From: Chris Mason Date: Mon, 15 Oct 2007 20:14:19 +0000 (-0400) Subject: Btrfs: Create extent_buffer interface for large blocksizes X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5f39d397dfbe;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Btrfs: Create extent_buffer interface for large blocksizes Signed-off-by: Chris Mason --- diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile index 6341cf7a9f91..a3b51085d7f0 100644 --- a/fs/btrfs/Makefile +++ b/fs/btrfs/Makefile @@ -23,4 +23,6 @@ modules_install: clean: $(MAKE) -C $(KERNELDIR) M=`pwd` clean +tester: + $(MAKE) -C $(KERNELDIR) M=`pwd` tree-defrag.o transaction.o sysfs.o super.o root-tree.o inode-map.o inode-item.o inode.o file-item.o file.o extent_map.o disk-io.o ctree.o dir-item.o extent-tree.o endif diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index b41f48ade419..f60920e8a0e0 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -16,21 +16,24 @@ * Boston, MA 021110-1307, USA. */ +#include #include "ctree.h" #include "disk-io.h" #include "transaction.h" +#include "print-tree.h" static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level); static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_key *ins_key, struct btrfs_path *path, int data_size); -static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct buffer_head *dst, struct buffer_head - *src); -static int balance_node_right(struct btrfs_trans_handle *trans, struct - btrfs_root *root, struct buffer_head *dst_buf, - struct buffer_head *src_buf); +static int push_node_left(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct extent_buffer *dst, + struct extent_buffer *src); +static int balance_node_right(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct extent_buffer *dst_buf, + struct extent_buffer *src_buf); static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level, int slot); @@ -62,40 +65,38 @@ void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p) for (i = 0; i < BTRFS_MAX_LEVEL; i++) { if (!p->nodes[i]) break; - btrfs_block_release(root, p->nodes[i]); + free_extent_buffer(p->nodes[i]); } memset(p, 0, sizeof(*p)); } -static int __btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct buffer_head *buf, struct buffer_head - *parent, int parent_slot, struct buffer_head - **cow_ret, u64 search_start, u64 empty_size) +static int __btrfs_cow_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct extent_buffer *buf, + struct extent_buffer *parent, int parent_slot, + struct extent_buffer **cow_ret, + u64 search_start, u64 empty_size) { - struct buffer_head *cow; - struct btrfs_node *cow_node; + struct extent_buffer *cow; int ret = 0; int different_trans = 0; WARN_ON(root->ref_cows && trans->transid != root->last_trans); - WARN_ON(!buffer_uptodate(buf)); + cow = btrfs_alloc_free_block(trans, root, search_start, empty_size); if (IS_ERR(cow)) return PTR_ERR(cow); - cow_node = btrfs_buffer_node(cow); - if (buf->b_size != root->blocksize || cow->b_size != root->blocksize) + if (buf->len != root->sectorsize || cow->len != root->sectorsize) WARN_ON(1); - memcpy(cow_node, btrfs_buffer_node(buf), root->blocksize); - btrfs_set_header_blocknr(&cow_node->header, bh_blocknr(cow)); - btrfs_set_header_generation(&cow_node->header, trans->transid); - btrfs_set_header_owner(&cow_node->header, root->root_key.objectid); + copy_extent_buffer(cow, buf, 0, 0, cow->len); + btrfs_set_header_blocknr(cow, extent_buffer_blocknr(cow)); + btrfs_set_header_generation(cow, trans->transid); + btrfs_set_header_owner(cow, root->root_key.objectid); - WARN_ON(btrfs_header_generation(btrfs_buffer_header(buf)) > - trans->transid); - if (btrfs_header_generation(btrfs_buffer_header(buf)) != - trans->transid) { + WARN_ON(btrfs_header_generation(buf) > trans->transid); + if (btrfs_header_generation(buf) != trans->transid) { different_trans = 1; ret = btrfs_inc_ref(trans, root, buf); if (ret) @@ -106,29 +107,29 @@ static int __btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root if (buf == root->node) { root->node = cow; - get_bh(cow); + extent_buffer_get(cow); if (buf != root->commit_root) { - btrfs_free_extent(trans, root, bh_blocknr(buf), 1, 1); + btrfs_free_extent(trans, root, + extent_buffer_blocknr(buf), 1, 1); } - btrfs_block_release(root, buf); + free_extent_buffer(buf); } else { - btrfs_set_node_blockptr(btrfs_buffer_node(parent), parent_slot, - bh_blocknr(cow)); + btrfs_set_node_blockptr(parent, parent_slot, + extent_buffer_blocknr(cow)); btrfs_mark_buffer_dirty(parent); - WARN_ON(btrfs_header_generation(btrfs_buffer_header(parent)) != - trans->transid); - btrfs_free_extent(trans, root, bh_blocknr(buf), 1, 1); + WARN_ON(btrfs_header_generation(parent) != trans->transid); + btrfs_free_extent(trans, root, extent_buffer_blocknr(buf),1,1); } - btrfs_block_release(root, buf); + free_extent_buffer(buf); btrfs_mark_buffer_dirty(cow); *cow_ret = cow; return 0; } -int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct buffer_head *buf, struct buffer_head - *parent, int parent_slot, struct buffer_head - **cow_ret) +int btrfs_cow_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct extent_buffer *buf, + struct extent_buffer *parent, int parent_slot, + struct extent_buffer **cow_ret) { u64 search_start; if (trans->transaction != root->fs_info->running_transaction) { @@ -141,13 +142,12 @@ int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root root->fs_info->generation); WARN_ON(1); } - if (btrfs_header_generation(btrfs_buffer_header(buf)) == - trans->transid) { + if (btrfs_header_generation(buf) == trans->transid) { *cow_ret = buf; return 0; } - search_start = bh_blocknr(buf) & ~((u64)65535); + search_start = extent_buffer_blocknr(buf) & ~((u64)65535); return __btrfs_cow_block(trans, root, buf, parent, parent_slot, cow_ret, search_start, 0); } @@ -161,9 +161,11 @@ static int close_blocks(u64 blocknr, u64 other) return 0; } -static int should_defrag_leaf(struct buffer_head *bh) +#if 0 +static int should_defrag_leaf(struct extent_buffer *eb) { - struct btrfs_leaf *leaf = btrfs_buffer_leaf(bh); + return 0; + struct btrfs_leaf *leaf = btrfs_buffer_leaf(eb); struct btrfs_disk_key *key; u32 nritems; @@ -188,14 +190,17 @@ static int should_defrag_leaf(struct buffer_head *bh) } return 0; } +#endif int btrfs_realloc_node(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct buffer_head *parent, + struct btrfs_root *root, struct extent_buffer *parent, int cache_only, u64 *last_ret) { + return 0; +#if 0 struct btrfs_node *parent_node; - struct buffer_head *cur_bh; - struct buffer_head *tmp_bh; + struct extent_buffer *cur_eb; + struct extent_buffer *tmp_eb; u64 blocknr; u64 search_start = *last_ret; u64 last_block = 0; @@ -281,6 +286,7 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans, brelse(tmp_bh); } return err; +#endif } /* @@ -289,12 +295,12 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans, * which is the stop of the leaf data stack */ static inline unsigned int leaf_data_end(struct btrfs_root *root, - struct btrfs_leaf *leaf) + struct extent_buffer *leaf) { - u32 nr = btrfs_header_nritems(&leaf->header); + u32 nr = btrfs_header_nritems(leaf); if (nr == 0) return BTRFS_LEAF_DATA_SIZE(root); - return btrfs_item_offset(leaf->items + nr - 1); + return btrfs_item_offset_nr(leaf, nr - 1); } /* @@ -310,9 +316,9 @@ static int comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2) return 1; if (k1.objectid < k2->objectid) return -1; - if (k1.flags > k2->flags) + if (k1.type > k2->type) return 1; - if (k1.flags < k2->flags) + if (k1.type < k2->type) return -1; if (k1.offset > k2->offset) return 1; @@ -324,37 +330,39 @@ static int comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2) static int check_node(struct btrfs_root *root, struct btrfs_path *path, int level) { - struct btrfs_node *parent = NULL; - struct btrfs_node *node = btrfs_buffer_node(path->nodes[level]); + struct extent_buffer *parent = NULL; + struct extent_buffer *node = path->nodes[level]; + struct btrfs_disk_key parent_key; + struct btrfs_disk_key node_key; int parent_slot; int slot; struct btrfs_key cpukey; - u32 nritems = btrfs_header_nritems(&node->header); + u32 nritems = btrfs_header_nritems(node); if (path->nodes[level + 1]) - parent = btrfs_buffer_node(path->nodes[level + 1]); + parent = path->nodes[level + 1]; slot = path->slots[level]; - BUG_ON(!buffer_uptodate(path->nodes[level])); BUG_ON(nritems == 0); if (parent) { - struct btrfs_disk_key *parent_key; - parent_slot = path->slots[level + 1]; - parent_key = &parent->ptrs[parent_slot].key; - BUG_ON(memcmp(parent_key, &node->ptrs[0].key, + btrfs_node_key(parent, &parent_key, parent_slot); + btrfs_node_key(node, &node_key, 0); + BUG_ON(memcmp(&parent_key, &node_key, sizeof(struct btrfs_disk_key))); BUG_ON(btrfs_node_blockptr(parent, parent_slot) != - btrfs_header_blocknr(&node->header)); + btrfs_header_blocknr(node)); } BUG_ON(nritems > BTRFS_NODEPTRS_PER_BLOCK(root)); if (slot != 0) { - btrfs_disk_key_to_cpu(&cpukey, &node->ptrs[slot - 1].key); - BUG_ON(comp_keys(&node->ptrs[slot].key, &cpukey) <= 0); + btrfs_node_key_to_cpu(node, &cpukey, slot - 1); + btrfs_node_key(node, &node_key, slot); + BUG_ON(comp_keys(&node_key, &cpukey) <= 0); } if (slot < nritems - 1) { - btrfs_disk_key_to_cpu(&cpukey, &node->ptrs[slot + 1].key); - BUG_ON(comp_keys(&node->ptrs[slot].key, &cpukey) >= 0); + btrfs_node_key_to_cpu(node, &cpukey, slot + 1); + btrfs_node_key(node, &node_key, slot); + BUG_ON(comp_keys(&node_key, &cpukey) >= 0); } return 0; } @@ -362,83 +370,172 @@ static int check_node(struct btrfs_root *root, struct btrfs_path *path, static int check_leaf(struct btrfs_root *root, struct btrfs_path *path, int level) { - struct btrfs_leaf *leaf = btrfs_buffer_leaf(path->nodes[level]); - struct btrfs_node *parent = NULL; + struct extent_buffer *leaf = path->nodes[level]; + struct extent_buffer *parent = NULL; int parent_slot; - int slot = path->slots[0]; struct btrfs_key cpukey; + struct btrfs_disk_key parent_key; + struct btrfs_disk_key leaf_key; + int slot = path->slots[0]; - u32 nritems = btrfs_header_nritems(&leaf->header); + u32 nritems = btrfs_header_nritems(leaf); if (path->nodes[level + 1]) - parent = btrfs_buffer_node(path->nodes[level + 1]); - - BUG_ON(btrfs_leaf_free_space(root, leaf) < 0); + parent = path->nodes[level + 1]; if (nritems == 0) return 0; if (parent) { - struct btrfs_disk_key *parent_key; - parent_slot = path->slots[level + 1]; - parent_key = &parent->ptrs[parent_slot].key; + btrfs_node_key(parent, &parent_key, parent_slot); + btrfs_item_key(leaf, &leaf_key, 0); - BUG_ON(memcmp(parent_key, &leaf->items[0].key, + BUG_ON(memcmp(&parent_key, &leaf_key, sizeof(struct btrfs_disk_key))); BUG_ON(btrfs_node_blockptr(parent, parent_slot) != - btrfs_header_blocknr(&leaf->header)); + btrfs_header_blocknr(leaf)); + } +#if 0 + for (i = 0; nritems > 1 && i < nritems - 2; i++) { + btrfs_item_key_to_cpu(leaf, &cpukey, i + 1); + btrfs_item_key(leaf, &leaf_key, i); + if (comp_keys(&leaf_key, &cpukey) >= 0) { + btrfs_print_leaf(root, leaf); + printk("slot %d offset bad key\n", i); + BUG_ON(1); + } + if (btrfs_item_offset_nr(leaf, i) != + btrfs_item_end_nr(leaf, i + 1)) { + btrfs_print_leaf(root, leaf); + printk("slot %d offset bad\n", i); + BUG_ON(1); + } + if (i == 0) { + if (btrfs_item_offset_nr(leaf, i) + + btrfs_item_size_nr(leaf, i) != + BTRFS_LEAF_DATA_SIZE(root)) { + btrfs_print_leaf(root, leaf); + printk("slot %d first offset bad\n", i); + BUG_ON(1); + } + } } - if (slot != 0) { - btrfs_disk_key_to_cpu(&cpukey, &leaf->items[slot - 1].key); - BUG_ON(comp_keys(&leaf->items[slot].key, &cpukey) <= 0); - BUG_ON(btrfs_item_offset(leaf->items + slot - 1) != - btrfs_item_end(leaf->items + slot)); + if (nritems > 0) { + if (btrfs_item_size_nr(leaf, nritems - 1) > 4096) { + btrfs_print_leaf(root, leaf); + printk("slot %d bad size \n", nritems - 1); + BUG_ON(1); + } + } +#endif + if (slot != 0 && slot < nritems - 1) { + btrfs_item_key(leaf, &leaf_key, slot); + btrfs_item_key_to_cpu(leaf, &cpukey, slot - 1); + if (comp_keys(&leaf_key, &cpukey) <= 0) { + btrfs_print_leaf(root, leaf); + printk("slot %d offset bad key\n", slot); + BUG_ON(1); + } + if (btrfs_item_offset_nr(leaf, slot - 1) != + btrfs_item_end_nr(leaf, slot)) { + btrfs_print_leaf(root, leaf); + printk("slot %d offset bad\n", slot); + BUG_ON(1); + } } if (slot < nritems - 1) { - btrfs_disk_key_to_cpu(&cpukey, &leaf->items[slot + 1].key); - BUG_ON(comp_keys(&leaf->items[slot].key, &cpukey) >= 0); - BUG_ON(btrfs_item_offset(leaf->items + slot) != - btrfs_item_end(leaf->items + slot + 1)); + btrfs_item_key(leaf, &leaf_key, slot); + btrfs_item_key_to_cpu(leaf, &cpukey, slot + 1); + BUG_ON(comp_keys(&leaf_key, &cpukey) >= 0); + if (btrfs_item_offset_nr(leaf, slot) != + btrfs_item_end_nr(leaf, slot + 1)) { + btrfs_print_leaf(root, leaf); + printk("slot %d offset bad\n", slot); + BUG_ON(1); + } } - BUG_ON(btrfs_item_offset(leaf->items) + - btrfs_item_size(leaf->items) != BTRFS_LEAF_DATA_SIZE(root)); + BUG_ON(btrfs_item_offset_nr(leaf, 0) + + btrfs_item_size_nr(leaf, 0) != BTRFS_LEAF_DATA_SIZE(root)); return 0; } static int check_block(struct btrfs_root *root, struct btrfs_path *path, int level) { - struct btrfs_node *node = btrfs_buffer_node(path->nodes[level]); - if (memcmp(node->header.fsid, root->fs_info->disk_super->fsid, - sizeof(node->header.fsid))) - BUG(); + struct extent_buffer *buf = path->nodes[level]; + char fsid[BTRFS_FSID_SIZE]; + + read_extent_buffer(buf, fsid, (unsigned long)btrfs_header_fsid(buf), + BTRFS_FSID_SIZE); + + if (memcmp(fsid, root->fs_info->fsid, BTRFS_FSID_SIZE)) { + int i = 0; + printk("warning bad block %Lu\n", buf->start); + if (!btrfs_buffer_uptodate(buf)) { + WARN_ON(1); + } + for (i = 0; i < BTRFS_FSID_SIZE; i++) { + printk("%x:%x ", root->fs_info->fsid[i], fsid[i]); + } + printk("\n"); + // BUG(); + } if (level == 0) return check_leaf(root, path, level); return check_node(root, path, level); } /* - * search for key in the array p. items p are item_size apart - * and there are 'max' items in p + * search for key in the extent_buffer. The items start at offset p, + * and they are item_size apart. There are 'max' items in p. + * * the slot in the array is returned via slot, and it points to * the place where you would insert key if it is not found in * the array. * * slot may point to max if the key is bigger than all of the keys */ -static int generic_bin_search(char *p, int item_size, struct btrfs_key *key, - int max, int *slot) +static int generic_bin_search(struct extent_buffer *eb, unsigned long p, + int item_size, struct btrfs_key *key, + int max, int *slot) { int low = 0; int high = max; int mid; int ret; struct btrfs_disk_key *tmp; + struct btrfs_disk_key unaligned; + unsigned long offset; + char *map_token = NULL; + char *kaddr = NULL; + unsigned long map_start = 0; + unsigned long map_len = 0; while(low < high) { mid = (low + high) / 2; - tmp = (struct btrfs_disk_key *)(p + mid * item_size); + offset = p + mid * item_size; + + if (!map_token || offset < map_start || + (offset + sizeof(struct btrfs_disk_key)) > + map_start + map_len) { + if (map_token) + unmap_extent_buffer(eb, map_token, KM_USER0); + map_extent_buffer(eb, offset, &map_token, &kaddr, + &map_start, &map_len, KM_USER0); + + } + if (offset + sizeof(struct btrfs_disk_key) > + map_start + map_len) { + unmap_extent_buffer(eb, map_token, KM_USER0); + read_extent_buffer(eb, &unaligned, + offset, sizeof(unaligned)); + map_token = NULL; + tmp = &unaligned; + } else { + tmp = (struct btrfs_disk_key *)(kaddr + offset - + map_start); + } ret = comp_keys(tmp, key); if (ret < 0) @@ -447,10 +544,13 @@ static int generic_bin_search(char *p, int item_size, struct btrfs_key *key, high = mid; else { *slot = mid; + unmap_extent_buffer(eb, map_token, KM_USER0); return 0; } } *slot = low; + if (map_token) + unmap_extent_buffer(eb, map_token, KM_USER0); return 1; } @@ -458,46 +558,42 @@ static int generic_bin_search(char *p, int item_size, struct btrfs_key *key, * simple bin_search frontend that does the right thing for * leaves vs nodes */ -static int bin_search(struct btrfs_node *c, struct btrfs_key *key, int *slot) +static int bin_search(struct extent_buffer *eb, struct btrfs_key *key, + int level, int *slot) { - if (btrfs_is_leaf(c)) { - struct btrfs_leaf *l = (struct btrfs_leaf *)c; - return generic_bin_search((void *)l->items, + if (level == 0) { + return generic_bin_search(eb, + offsetof(struct btrfs_leaf, items), sizeof(struct btrfs_item), - key, btrfs_header_nritems(&c->header), + key, btrfs_header_nritems(eb), slot); } else { - return generic_bin_search((void *)c->ptrs, + return generic_bin_search(eb, + offsetof(struct btrfs_node, ptrs), sizeof(struct btrfs_key_ptr), - key, btrfs_header_nritems(&c->header), + key, btrfs_header_nritems(eb), slot); } return -1; } -static struct buffer_head *read_node_slot(struct btrfs_root *root, - struct buffer_head *parent_buf, - int slot) +static struct extent_buffer *read_node_slot(struct btrfs_root *root, + struct extent_buffer *parent, int slot) { - struct btrfs_node *node = btrfs_buffer_node(parent_buf); if (slot < 0) return NULL; - if (slot >= btrfs_header_nritems(&node->header)) + if (slot >= btrfs_header_nritems(parent)) return NULL; - return read_tree_block(root, btrfs_node_blockptr(node, slot)); + return read_tree_block(root, btrfs_node_blockptr(parent, slot)); } static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level) { - struct buffer_head *right_buf; - struct buffer_head *mid_buf; - struct buffer_head *left_buf; - struct buffer_head *parent_buf = NULL; - struct btrfs_node *right = NULL; - struct btrfs_node *mid; - struct btrfs_node *left = NULL; - struct btrfs_node *parent = NULL; + struct extent_buffer *right = NULL; + struct extent_buffer *mid; + struct extent_buffer *left = NULL; + struct extent_buffer *parent = NULL; int ret = 0; int wret; int pslot; @@ -508,60 +604,57 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root if (level == 0) return 0; - mid_buf = path->nodes[level]; - mid = btrfs_buffer_node(mid_buf); + mid = path->nodes[level]; orig_ptr = btrfs_node_blockptr(mid, orig_slot); if (level < BTRFS_MAX_LEVEL - 1) - parent_buf = path->nodes[level + 1]; + parent = path->nodes[level + 1]; pslot = path->slots[level + 1]; /* * deal with the case where there is only one pointer in the root * by promoting the node below to a root */ - if (!parent_buf) { - struct buffer_head *child; - u64 blocknr = bh_blocknr(mid_buf); + if (!parent) { + struct extent_buffer *child; + u64 blocknr = extent_buffer_blocknr(mid); - if (btrfs_header_nritems(&mid->header) != 1) + if (btrfs_header_nritems(mid) != 1) return 0; /* promote the child to a root */ - child = read_node_slot(root, mid_buf, 0); + child = read_node_slot(root, mid, 0); BUG_ON(!child); root->node = child; path->nodes[level] = NULL; - clean_tree_block(trans, root, mid_buf); - wait_on_buffer(mid_buf); + clean_tree_block(trans, root, mid); + wait_on_tree_block_writeback(root, mid); /* once for the path */ - btrfs_block_release(root, mid_buf); + free_extent_buffer(mid); /* once for the root ptr */ - btrfs_block_release(root, mid_buf); + free_extent_buffer(mid); return btrfs_free_extent(trans, root, blocknr, 1, 1); } - parent = btrfs_buffer_node(parent_buf); - - if (btrfs_header_nritems(&mid->header) > + if (btrfs_header_nritems(mid) > BTRFS_NODEPTRS_PER_BLOCK(root) / 4) return 0; - if (btrfs_header_nritems(&mid->header) < 2) + if (btrfs_header_nritems(mid) < 2) err_on_enospc = 1; - left_buf = read_node_slot(root, parent_buf, pslot - 1); - if (left_buf) { - wret = btrfs_cow_block(trans, root, left_buf, - parent_buf, pslot - 1, &left_buf); + left = read_node_slot(root, parent, pslot - 1); + if (left) { + wret = btrfs_cow_block(trans, root, left, + parent, pslot - 1, &left); if (wret) { ret = wret; goto enospc; } } - right_buf = read_node_slot(root, parent_buf, pslot + 1); - if (right_buf) { - wret = btrfs_cow_block(trans, root, right_buf, - parent_buf, pslot + 1, &right_buf); + right = read_node_slot(root, parent, pslot + 1); + if (right) { + wret = btrfs_cow_block(trans, root, right, + parent, pslot + 1, &right); if (wret) { ret = wret; goto enospc; @@ -569,30 +662,27 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root } /* first, try to make some room in the middle buffer */ - if (left_buf) { - left = btrfs_buffer_node(left_buf); - orig_slot += btrfs_header_nritems(&left->header); - wret = push_node_left(trans, root, left_buf, mid_buf); + if (left) { + orig_slot += btrfs_header_nritems(left); + wret = push_node_left(trans, root, left, mid); if (wret < 0) ret = wret; - if (btrfs_header_nritems(&mid->header) < 2) + if (btrfs_header_nritems(mid) < 2) err_on_enospc = 1; } /* * then try to empty the right most buffer into the middle */ - if (right_buf) { - right = btrfs_buffer_node(right_buf); - wret = push_node_left(trans, root, mid_buf, right_buf); + if (right) { + wret = push_node_left(trans, root, mid, right); if (wret < 0 && wret != -ENOSPC) ret = wret; - if (btrfs_header_nritems(&right->header) == 0) { - u64 blocknr = bh_blocknr(right_buf); - clean_tree_block(trans, root, right_buf); - wait_on_buffer(right_buf); - btrfs_block_release(root, right_buf); - right_buf = NULL; + if (btrfs_header_nritems(right) == 0) { + u64 blocknr = extent_buffer_blocknr(right); + clean_tree_block(trans, root, right); + wait_on_tree_block_writeback(root, right); + free_extent_buffer(right); right = NULL; wret = del_ptr(trans, root, path, level + 1, pslot + 1); @@ -602,14 +692,13 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root if (wret) ret = wret; } else { - btrfs_memcpy(root, parent, - &parent->ptrs[pslot + 1].key, - &right->ptrs[0].key, - sizeof(struct btrfs_disk_key)); - btrfs_mark_buffer_dirty(parent_buf); + struct btrfs_disk_key right_key; + btrfs_node_key(right, &right_key, 0); + btrfs_set_node_key(parent, &right_key, pslot + 1); + btrfs_mark_buffer_dirty(parent); } } - if (btrfs_header_nritems(&mid->header) == 1) { + if (btrfs_header_nritems(mid) == 1) { /* * we're not allowed to leave a node with one item in the * tree during a delete. A deletion from lower in the tree @@ -619,21 +708,20 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root * otherwise we would have pulled some pointers from the * right */ - BUG_ON(!left_buf); - wret = balance_node_right(trans, root, mid_buf, left_buf); + BUG_ON(!left); + wret = balance_node_right(trans, root, mid, left); if (wret < 0) { ret = wret; goto enospc; } BUG_ON(wret == 1); } - if (btrfs_header_nritems(&mid->header) == 0) { + if (btrfs_header_nritems(mid) == 0) { /* we've managed to empty the middle node, drop it */ - u64 blocknr = bh_blocknr(mid_buf); - clean_tree_block(trans, root, mid_buf); - wait_on_buffer(mid_buf); - btrfs_block_release(root, mid_buf); - mid_buf = NULL; + u64 blocknr = extent_buffer_blocknr(mid); + clean_tree_block(trans, root, mid); + wait_on_tree_block_writeback(root, mid); + free_extent_buffer(mid); mid = NULL; wret = del_ptr(trans, root, path, level + 1, pslot); if (wret) @@ -643,37 +731,36 @@ static int balance_level(struct btrfs_trans_handle *trans, struct btrfs_root ret = wret; } else { /* update the parent key to reflect our changes */ - btrfs_memcpy(root, parent, - &parent->ptrs[pslot].key, &mid->ptrs[0].key, - sizeof(struct btrfs_disk_key)); - btrfs_mark_buffer_dirty(parent_buf); + struct btrfs_disk_key mid_key; + btrfs_node_key(mid, &mid_key, 0); + btrfs_set_node_key(parent, &mid_key, pslot); + btrfs_mark_buffer_dirty(parent); } /* update the path */ - if (left_buf) { - if (btrfs_header_nritems(&left->header) > orig_slot) { - get_bh(left_buf); - path->nodes[level] = left_buf; + if (left) { + if (btrfs_header_nritems(left) > orig_slot) { + extent_buffer_get(left); + path->nodes[level] = left; path->slots[level + 1] -= 1; path->slots[level] = orig_slot; - if (mid_buf) - btrfs_block_release(root, mid_buf); + if (mid) + free_extent_buffer(mid); } else { - orig_slot -= btrfs_header_nritems(&left->header); + orig_slot -= btrfs_header_nritems(left); path->slots[level] = orig_slot; } } /* double check we haven't messed things up */ check_block(root, path, level); if (orig_ptr != - btrfs_node_blockptr(btrfs_buffer_node(path->nodes[level]), - path->slots[level])) + btrfs_node_blockptr(path->nodes[level], path->slots[level])) BUG(); enospc: - if (right_buf) - btrfs_block_release(root, right_buf); - if (left_buf) - btrfs_block_release(root, left_buf); + if (right) + free_extent_buffer(right); + if (left) + free_extent_buffer(left); return ret; } @@ -682,14 +769,10 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level) { - struct buffer_head *right_buf; - struct buffer_head *mid_buf; - struct buffer_head *left_buf; - struct buffer_head *parent_buf = NULL; - struct btrfs_node *right = NULL; - struct btrfs_node *mid; - struct btrfs_node *left = NULL; - struct btrfs_node *parent = NULL; + struct extent_buffer *right = NULL; + struct extent_buffer *mid; + struct extent_buffer *left = NULL; + struct extent_buffer *parent = NULL; int ret = 0; int wret; int pslot; @@ -699,107 +782,101 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans, if (level == 0) return 1; - mid_buf = path->nodes[level]; - mid = btrfs_buffer_node(mid_buf); + mid = path->nodes[level]; orig_ptr = btrfs_node_blockptr(mid, orig_slot); if (level < BTRFS_MAX_LEVEL - 1) - parent_buf = path->nodes[level + 1]; + parent = path->nodes[level + 1]; pslot = path->slots[level + 1]; - if (!parent_buf) + if (!parent) return 1; - parent = btrfs_buffer_node(parent_buf); - left_buf = read_node_slot(root, parent_buf, pslot - 1); + left = read_node_slot(root, parent, pslot - 1); /* first, try to make some room in the middle buffer */ - if (left_buf) { + if (left) { u32 left_nr; - left = btrfs_buffer_node(left_buf); - left_nr = btrfs_header_nritems(&left->header); + left_nr = btrfs_header_nritems(left); if (left_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) { wret = 1; } else { - ret = btrfs_cow_block(trans, root, left_buf, parent_buf, - pslot - 1, &left_buf); + ret = btrfs_cow_block(trans, root, left, parent, + pslot - 1, &left); if (ret) wret = 1; else { - left = btrfs_buffer_node(left_buf); wret = push_node_left(trans, root, - left_buf, mid_buf); + left, mid); } } if (wret < 0) ret = wret; if (wret == 0) { + struct btrfs_disk_key disk_key; orig_slot += left_nr; - btrfs_memcpy(root, parent, - &parent->ptrs[pslot].key, - &mid->ptrs[0].key, - sizeof(struct btrfs_disk_key)); - btrfs_mark_buffer_dirty(parent_buf); - if (btrfs_header_nritems(&left->header) > orig_slot) { - path->nodes[level] = left_buf; + btrfs_node_key(mid, &disk_key, 0); + btrfs_set_node_key(parent, &disk_key, pslot); + btrfs_mark_buffer_dirty(parent); + if (btrfs_header_nritems(left) > orig_slot) { + path->nodes[level] = left; path->slots[level + 1] -= 1; path->slots[level] = orig_slot; - btrfs_block_release(root, mid_buf); + free_extent_buffer(mid); } else { orig_slot -= - btrfs_header_nritems(&left->header); + btrfs_header_nritems(left); path->slots[level] = orig_slot; - btrfs_block_release(root, left_buf); + free_extent_buffer(left); } check_node(root, path, level); return 0; } - btrfs_block_release(root, left_buf); + free_extent_buffer(left); } - right_buf = read_node_slot(root, parent_buf, pslot + 1); + right= read_node_slot(root, parent, pslot + 1); /* * then try to empty the right most buffer into the middle */ - if (right_buf) { + if (right) { u32 right_nr; - right = btrfs_buffer_node(right_buf); - right_nr = btrfs_header_nritems(&right->header); + right_nr = btrfs_header_nritems(right); if (right_nr >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) { wret = 1; } else { - ret = btrfs_cow_block(trans, root, right_buf, - parent_buf, pslot + 1, - &right_buf); + ret = btrfs_cow_block(trans, root, right, + parent, pslot + 1, + &right); if (ret) wret = 1; else { - right = btrfs_buffer_node(right_buf); wret = balance_node_right(trans, root, - right_buf, mid_buf); + right, mid); } } if (wret < 0) ret = wret; if (wret == 0) { - btrfs_memcpy(root, parent, - &parent->ptrs[pslot + 1].key, - &right->ptrs[0].key, - sizeof(struct btrfs_disk_key)); - btrfs_mark_buffer_dirty(parent_buf); - if (btrfs_header_nritems(&mid->header) <= orig_slot) { - path->nodes[level] = right_buf; + struct btrfs_disk_key disk_key; + + btrfs_node_key(right, &disk_key, 0); + btrfs_set_node_key(parent, &disk_key, pslot + 1); + btrfs_mark_buffer_dirty(parent); + + if (btrfs_header_nritems(mid) <= orig_slot) { + path->nodes[level] = right; path->slots[level + 1] += 1; path->slots[level] = orig_slot - - btrfs_header_nritems(&mid->header); - btrfs_block_release(root, mid_buf); + btrfs_header_nritems(mid); + free_extent_buffer(mid); } else { - btrfs_block_release(root, right_buf); + free_extent_buffer(right); } check_node(root, path, level); return 0; } - btrfs_block_release(root, right_buf); + free_extent_buffer(right); } check_node(root, path, level); return 1; @@ -811,10 +888,9 @@ static int push_nodes_for_insert(struct btrfs_trans_handle *trans, static void reada_for_search(struct btrfs_root *root, struct btrfs_path *path, int level, int slot) { - struct btrfs_node *node; + struct extent_buffer *node; int i; u32 nritems; - u64 item_objectid; u64 blocknr; u64 search; u64 cluster_start; @@ -823,7 +899,7 @@ static void reada_for_search(struct btrfs_root *root, struct btrfs_path *path, int direction = path->reada; struct radix_tree_root found; unsigned long gang[8]; - struct buffer_head *bh; + struct extent_buffer *eb; if (level == 0) return; @@ -831,18 +907,17 @@ static void reada_for_search(struct btrfs_root *root, struct btrfs_path *path, if (!path->nodes[level]) return; - node = btrfs_buffer_node(path->nodes[level]); + node = path->nodes[level]; search = btrfs_node_blockptr(node, slot); - bh = btrfs_find_tree_block(root, search); - if (bh) { - brelse(bh); + eb = btrfs_find_tree_block(root, search); + if (eb) { + free_extent_buffer(eb); return; } init_bit_radix(&found); - nritems = btrfs_header_nritems(&node->header); + nritems = btrfs_header_nritems(node); for (i = slot; i < nritems; i++) { - item_objectid = btrfs_disk_key_objectid(&node->ptrs[i].key); blocknr = btrfs_node_blockptr(node, i); set_radix_bit(&found, blocknr); } @@ -886,8 +961,7 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_key *key, struct btrfs_path *p, int ins_len, int cow) { - struct buffer_head *b; - struct btrfs_node *c; + struct extent_buffer *b; u64 blocknr; int slot; int ret; @@ -901,10 +975,9 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root WARN_ON(!mutex_is_locked(&root->fs_info->fs_mutex)); again: b = root->node; - get_bh(b); + extent_buffer_get(b); while (b) { - c = btrfs_buffer_node(b); - level = btrfs_header_level(&c->header); + level = btrfs_header_level(b); if (cow) { int wret; wret = btrfs_cow_block(trans, root, b, @@ -912,32 +985,30 @@ again: p->slots[level + 1], &b); if (wret) { - btrfs_block_release(root, b); + free_extent_buffer(b); return wret; } - c = btrfs_buffer_node(b); } BUG_ON(!cow && ins_len); - if (level != btrfs_header_level(&c->header)) + if (level != btrfs_header_level(b)) WARN_ON(1); - level = btrfs_header_level(&c->header); + level = btrfs_header_level(b); p->nodes[level] = b; ret = check_block(root, p, level); if (ret) return -1; - ret = bin_search(c, key, &slot); - if (!btrfs_is_leaf(c)) { + ret = bin_search(b, key, level, &slot); + if (level != 0) { if (ret && slot > 0) slot -= 1; p->slots[level] = slot; - if (ins_len > 0 && btrfs_header_nritems(&c->header) >= + if (ins_len > 0 && btrfs_header_nritems(b) >= BTRFS_NODEPTRS_PER_BLOCK(root) - 1) { int sret = split_node(trans, root, p, level); BUG_ON(sret > 0); if (sret) return sret; b = p->nodes[level]; - c = btrfs_buffer_node(b); slot = p->slots[level]; } else if (ins_len < 0) { int sret = balance_level(trans, root, p, @@ -947,22 +1018,19 @@ again: b = p->nodes[level]; if (!b) goto again; - c = btrfs_buffer_node(b); slot = p->slots[level]; - BUG_ON(btrfs_header_nritems(&c->header) == 1); + BUG_ON(btrfs_header_nritems(b) == 1); } /* this is only true while dropping a snapshot */ if (level == lowest_level) break; - blocknr = btrfs_node_blockptr(c, slot); + blocknr = btrfs_node_blockptr(b, slot); if (should_reada) reada_for_search(root, p, level, slot); - b = read_tree_block(root, btrfs_node_blockptr(c, slot)); - + b = read_tree_block(root, btrfs_node_blockptr(b, slot)); } else { - struct btrfs_leaf *l = (struct btrfs_leaf *)c; p->slots[level] = slot; - if (ins_len > 0 && btrfs_leaf_free_space(root, l) < + if (ins_len > 0 && btrfs_leaf_free_space(root, b) < sizeof(struct btrfs_item) + ins_len) { int sret = split_leaf(trans, root, key, p, ins_len); @@ -986,19 +1054,20 @@ again: * If this fails to write a tree block, it returns -1, but continues * fixing up the blocks in ram so the tree is consistent. */ -static int fixup_low_keys(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_path *path, struct btrfs_disk_key - *key, int level) +static int fixup_low_keys(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + struct btrfs_disk_key *key, int level) { int i; int ret = 0; + struct extent_buffer *t; + for (i = level; i < BTRFS_MAX_LEVEL; i++) { - struct btrfs_node *t; int tslot = path->slots[i]; if (!path->nodes[i]) break; - t = btrfs_buffer_node(path->nodes[i]); - btrfs_memcpy(root, t, &t->ptrs[tslot].key, key, sizeof(*key)); + t = path->nodes[i]; + btrfs_set_node_key(t, key, tslot); btrfs_mark_buffer_dirty(path->nodes[i]); if (tslot != 0) break; @@ -1014,18 +1083,16 @@ static int fixup_low_keys(struct btrfs_trans_handle *trans, struct btrfs_root * error, and > 0 if there was no room in the left hand block. */ static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct buffer_head *dst_buf, struct - buffer_head *src_buf) + *root, struct extent_buffer *dst, + struct extent_buffer *src) { - struct btrfs_node *src = btrfs_buffer_node(src_buf); - struct btrfs_node *dst = btrfs_buffer_node(dst_buf); int push_items = 0; int src_nritems; int dst_nritems; int ret = 0; - src_nritems = btrfs_header_nritems(&src->header); - dst_nritems = btrfs_header_nritems(&dst->header); + src_nritems = btrfs_header_nritems(src); + dst_nritems = btrfs_header_nritems(dst); push_items = BTRFS_NODEPTRS_PER_BLOCK(root) - dst_nritems; if (push_items <= 0) { @@ -1035,17 +1102,21 @@ static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root if (src_nritems < push_items) push_items = src_nritems; - btrfs_memcpy(root, dst, dst->ptrs + dst_nritems, src->ptrs, - push_items * sizeof(struct btrfs_key_ptr)); + copy_extent_buffer(dst, src, + btrfs_node_key_ptr_offset(dst_nritems), + btrfs_node_key_ptr_offset(0), + push_items * sizeof(struct btrfs_key_ptr)); + if (push_items < src_nritems) { - btrfs_memmove(root, src, src->ptrs, src->ptrs + push_items, - (src_nritems - push_items) * - sizeof(struct btrfs_key_ptr)); - } - btrfs_set_header_nritems(&src->header, src_nritems - push_items); - btrfs_set_header_nritems(&dst->header, dst_nritems + push_items); - btrfs_mark_buffer_dirty(src_buf); - btrfs_mark_buffer_dirty(dst_buf); + memmove_extent_buffer(src, btrfs_node_key_ptr_offset(0), + btrfs_node_key_ptr_offset(push_items), + (src_nritems - push_items) * + sizeof(struct btrfs_key_ptr)); + } + btrfs_set_header_nritems(src, src_nritems - push_items); + btrfs_set_header_nritems(dst, dst_nritems + push_items); + btrfs_mark_buffer_dirty(src); + btrfs_mark_buffer_dirty(dst); return ret; } @@ -1058,24 +1129,22 @@ static int push_node_left(struct btrfs_trans_handle *trans, struct btrfs_root * * this will only push up to 1/2 the contents of the left node over */ -static int balance_node_right(struct btrfs_trans_handle *trans, struct - btrfs_root *root, struct buffer_head *dst_buf, - struct buffer_head *src_buf) +static int balance_node_right(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct extent_buffer *dst, + struct extent_buffer *src) { - struct btrfs_node *src = btrfs_buffer_node(src_buf); - struct btrfs_node *dst = btrfs_buffer_node(dst_buf); int push_items = 0; int max_push; int src_nritems; int dst_nritems; int ret = 0; - src_nritems = btrfs_header_nritems(&src->header); - dst_nritems = btrfs_header_nritems(&dst->header); + src_nritems = btrfs_header_nritems(src); + dst_nritems = btrfs_header_nritems(dst); push_items = BTRFS_NODEPTRS_PER_BLOCK(root) - dst_nritems; - if (push_items <= 0) { + if (push_items <= 0) return 1; - } max_push = src_nritems / 2 + 1; /* don't try to empty the node */ @@ -1085,18 +1154,21 @@ static int balance_node_right(struct btrfs_trans_handle *trans, struct if (max_push < push_items) push_items = max_push; - btrfs_memmove(root, dst, dst->ptrs + push_items, dst->ptrs, - dst_nritems * sizeof(struct btrfs_key_ptr)); + memmove_extent_buffer(dst, btrfs_node_key_ptr_offset(push_items), + btrfs_node_key_ptr_offset(0), + (dst_nritems) * + sizeof(struct btrfs_key_ptr)); - btrfs_memcpy(root, dst, dst->ptrs, - src->ptrs + src_nritems - push_items, - push_items * sizeof(struct btrfs_key_ptr)); + copy_extent_buffer(dst, src, + btrfs_node_key_ptr_offset(0), + btrfs_node_key_ptr_offset(src_nritems - push_items), + push_items * sizeof(struct btrfs_key_ptr)); - btrfs_set_header_nritems(&src->header, src_nritems - push_items); - btrfs_set_header_nritems(&dst->header, dst_nritems + push_items); + btrfs_set_header_nritems(src, src_nritems - push_items); + btrfs_set_header_nritems(dst, dst_nritems + push_items); - btrfs_mark_buffer_dirty(src_buf); - btrfs_mark_buffer_dirty(dst_buf); + btrfs_mark_buffer_dirty(src); + btrfs_mark_buffer_dirty(dst); return ret; } @@ -1107,45 +1179,46 @@ static int balance_node_right(struct btrfs_trans_handle *trans, struct * * returns zero on success or < 0 on failure. */ -static int insert_new_root(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_path *path, int level) +static int insert_new_root(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, int level) { - struct buffer_head *t; - struct btrfs_node *lower; - struct btrfs_node *c; - struct btrfs_disk_key *lower_key; + struct extent_buffer *lower; + struct extent_buffer *c; + struct btrfs_disk_key lower_key; BUG_ON(path->nodes[level]); BUG_ON(path->nodes[level-1] != root->node); - t = btrfs_alloc_free_block(trans, root, root->node->b_blocknr, 0); - if (IS_ERR(t)) - return PTR_ERR(t); - c = btrfs_buffer_node(t); - memset(c, 0, root->blocksize); - btrfs_set_header_nritems(&c->header, 1); - btrfs_set_header_level(&c->header, level); - btrfs_set_header_blocknr(&c->header, bh_blocknr(t)); - btrfs_set_header_generation(&c->header, trans->transid); - btrfs_set_header_owner(&c->header, root->root_key.objectid); - lower = btrfs_buffer_node(path->nodes[level-1]); - memcpy(c->header.fsid, root->fs_info->disk_super->fsid, - sizeof(c->header.fsid)); - if (btrfs_is_leaf(lower)) - lower_key = &((struct btrfs_leaf *)lower)->items[0].key; + c = btrfs_alloc_free_block(trans, root, + extent_buffer_blocknr(root->node), 0); + if (IS_ERR(c)) + return PTR_ERR(c); + memset_extent_buffer(c, 0, 0, root->nodesize); + btrfs_set_header_nritems(c, 1); + btrfs_set_header_level(c, level); + btrfs_set_header_blocknr(c, extent_buffer_blocknr(c)); + btrfs_set_header_generation(c, trans->transid); + btrfs_set_header_owner(c, root->root_key.objectid); + lower = path->nodes[level-1]; + + write_extent_buffer(c, root->fs_info->fsid, + (unsigned long)btrfs_header_fsid(c), + BTRFS_FSID_SIZE); + if (level == 1) + btrfs_item_key(lower, &lower_key, 0); else - lower_key = &lower->ptrs[0].key; - btrfs_memcpy(root, c, &c->ptrs[0].key, lower_key, - sizeof(struct btrfs_disk_key)); - btrfs_set_node_blockptr(c, 0, bh_blocknr(path->nodes[level - 1])); + btrfs_node_key(lower, &lower_key, 0); + btrfs_set_node_key(c, &lower_key, 0); + btrfs_set_node_blockptr(c, 0, extent_buffer_blocknr(lower)); - btrfs_mark_buffer_dirty(t); + btrfs_mark_buffer_dirty(c); /* the super has an extra ref to root->node */ - btrfs_block_release(root, root->node); - root->node = t; - get_bh(t); - path->nodes[level] = t; + free_extent_buffer(root->node); + root->node = c; + extent_buffer_get(c); + path->nodes[level] = c; path->slots[level] = 0; return 0; } @@ -1163,26 +1236,26 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, struct btrfs_disk_key *key, u64 blocknr, int slot, int level) { - struct btrfs_node *lower; + struct extent_buffer *lower; int nritems; BUG_ON(!path->nodes[level]); - lower = btrfs_buffer_node(path->nodes[level]); - nritems = btrfs_header_nritems(&lower->header); + lower = path->nodes[level]; + nritems = btrfs_header_nritems(lower); if (slot > nritems) BUG(); if (nritems == BTRFS_NODEPTRS_PER_BLOCK(root)) BUG(); if (slot != nritems) { - btrfs_memmove(root, lower, lower->ptrs + slot + 1, - lower->ptrs + slot, + memmove_extent_buffer(lower, + btrfs_node_key_ptr_offset(slot + 1), + btrfs_node_key_ptr_offset(slot), (nritems - slot) * sizeof(struct btrfs_key_ptr)); } - btrfs_memcpy(root, lower, &lower->ptrs[slot].key, - key, sizeof(struct btrfs_disk_key)); + btrfs_set_node_key(lower, key, slot); btrfs_set_node_blockptr(lower, slot, blocknr); - btrfs_set_header_nritems(&lower->header, nritems + 1); - btrfs_mark_buffer_dirty(path->nodes[level]); + btrfs_set_header_nritems(lower, nritems + 1); + btrfs_mark_buffer_dirty(lower); check_node(root, path, level); return 0; } @@ -1199,69 +1272,73 @@ static int insert_ptr(struct btrfs_trans_handle *trans, struct btrfs_root static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level) { - struct buffer_head *t; - struct btrfs_node *c; - struct buffer_head *split_buffer; - struct btrfs_node *split; + struct extent_buffer *c; + struct extent_buffer *split; + struct btrfs_disk_key disk_key; int mid; int ret; int wret; u32 c_nritems; - t = path->nodes[level]; - c = btrfs_buffer_node(t); - if (t == root->node) { + c = path->nodes[level]; + if (c == root->node) { /* trying to split the root, lets make a new one */ ret = insert_new_root(trans, root, path, level + 1); if (ret) return ret; } else { ret = push_nodes_for_insert(trans, root, path, level); - t = path->nodes[level]; - c = btrfs_buffer_node(t); - if (!ret && - btrfs_header_nritems(&c->header) < + c = path->nodes[level]; + if (!ret && btrfs_header_nritems(c) < BTRFS_NODEPTRS_PER_BLOCK(root) - 1) return 0; if (ret < 0) return ret; } - c_nritems = btrfs_header_nritems(&c->header); - split_buffer = btrfs_alloc_free_block(trans, root, t->b_blocknr, 0); - if (IS_ERR(split_buffer)) - return PTR_ERR(split_buffer); + c_nritems = btrfs_header_nritems(c); + split = btrfs_alloc_free_block(trans, root, + extent_buffer_blocknr(c), 0); + if (IS_ERR(split)) + return PTR_ERR(split); + + btrfs_set_header_flags(split, btrfs_header_flags(c)); + btrfs_set_header_level(split, btrfs_header_level(c)); + btrfs_set_header_blocknr(split, extent_buffer_blocknr(split)); + btrfs_set_header_generation(split, trans->transid); + btrfs_set_header_owner(split, root->root_key.objectid); + write_extent_buffer(split, root->fs_info->fsid, + (unsigned long)btrfs_header_fsid(split), + BTRFS_FSID_SIZE); - split = btrfs_buffer_node(split_buffer); - btrfs_set_header_flags(&split->header, btrfs_header_flags(&c->header)); - btrfs_set_header_level(&split->header, btrfs_header_level(&c->header)); - btrfs_set_header_blocknr(&split->header, bh_blocknr(split_buffer)); - btrfs_set_header_generation(&split->header, trans->transid); - btrfs_set_header_owner(&split->header, root->root_key.objectid); - memcpy(split->header.fsid, root->fs_info->disk_super->fsid, - sizeof(split->header.fsid)); mid = (c_nritems + 1) / 2; - btrfs_memcpy(root, split, split->ptrs, c->ptrs + mid, - (c_nritems - mid) * sizeof(struct btrfs_key_ptr)); - btrfs_set_header_nritems(&split->header, c_nritems - mid); - btrfs_set_header_nritems(&c->header, mid); + + copy_extent_buffer(split, c, + btrfs_node_key_ptr_offset(0), + btrfs_node_key_ptr_offset(mid), + (c_nritems - mid) * sizeof(struct btrfs_key_ptr)); + btrfs_set_header_nritems(split, c_nritems - mid); + btrfs_set_header_nritems(c, mid); ret = 0; - btrfs_mark_buffer_dirty(t); - btrfs_mark_buffer_dirty(split_buffer); - wret = insert_ptr(trans, root, path, &split->ptrs[0].key, - bh_blocknr(split_buffer), path->slots[level + 1] + 1, + btrfs_mark_buffer_dirty(c); + btrfs_mark_buffer_dirty(split); + + btrfs_node_key(split, &disk_key, 0); + wret = insert_ptr(trans, root, path, &disk_key, + extent_buffer_blocknr(split), + path->slots[level + 1] + 1, level + 1); if (wret) ret = wret; if (path->slots[level] >= mid) { path->slots[level] -= mid; - btrfs_block_release(root, t); - path->nodes[level] = split_buffer; + free_extent_buffer(c); + path->nodes[level] = split; path->slots[level + 1] += 1; } else { - btrfs_block_release(root, split_buffer); + free_extent_buffer(split); } return ret; } @@ -1271,16 +1348,16 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root * and nr indicate which items in the leaf to check. This totals up the * space used both by the item structs and the item data */ -static int leaf_space_used(struct btrfs_leaf *l, int start, int nr) +static int leaf_space_used(struct extent_buffer *l, int start, int nr) { int data_len; - int nritems = btrfs_header_nritems(&l->header); + int nritems = btrfs_header_nritems(l); int end = min(nritems, start + nr) - 1; if (!nr) return 0; - data_len = btrfs_item_end(l->items + start); - data_len = data_len - btrfs_item_offset(l->items + end); + data_len = btrfs_item_end_nr(l, start); + data_len = data_len - btrfs_item_offset_nr(l, end); data_len += sizeof(struct btrfs_item) * nr; WARN_ON(data_len < 0); return data_len; @@ -1291,10 +1368,17 @@ static int leaf_space_used(struct btrfs_leaf *l, int start, int nr) * the start of the leaf data. IOW, how much room * the leaf has left for both items and data */ -int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf) +int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf) { - int nritems = btrfs_header_nritems(&leaf->header); - return BTRFS_LEAF_DATA_SIZE(root) - leaf_space_used(leaf, 0, nritems); + int nritems = btrfs_header_nritems(leaf); + int ret; + ret = BTRFS_LEAF_DATA_SIZE(root) - leaf_space_used(leaf, 0, nritems); + if (ret < 0) { + printk("leaf free space ret %d, leaf data size %lu, used %d nritems %d\n", + ret, BTRFS_LEAF_DATA_SIZE(root), + leaf_space_used(leaf, 0, nritems), nritems); + } + return ret; } /* @@ -1307,12 +1391,10 @@ int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf) static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int data_size) { - struct buffer_head *left_buf = path->nodes[0]; - struct btrfs_leaf *left = btrfs_buffer_leaf(left_buf); - struct btrfs_leaf *right; - struct buffer_head *right_buf; - struct buffer_head *upper; - struct btrfs_node *upper_node; + struct extent_buffer *left = path->nodes[0]; + struct extent_buffer *right; + struct extent_buffer *upper; + struct btrfs_disk_key disk_key; int slot; int i; int free_space; @@ -1321,6 +1403,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root struct btrfs_item *item; u32 left_nritems; u32 right_nritems; + u32 data_end; int ret; slot = path->slots[1]; @@ -1328,102 +1411,109 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root return 1; } upper = path->nodes[1]; - upper_node = btrfs_buffer_node(upper); - if (slot >= btrfs_header_nritems(&upper_node->header) - 1) { + if (slot >= btrfs_header_nritems(upper) - 1) return 1; - } - right_buf = read_tree_block(root, - btrfs_node_blockptr(btrfs_buffer_node(upper), slot + 1)); - right = btrfs_buffer_leaf(right_buf); + + right = read_tree_block(root, btrfs_node_blockptr(upper, slot + 1)); free_space = btrfs_leaf_free_space(root, right); if (free_space < data_size + sizeof(struct btrfs_item)) { - btrfs_block_release(root, right_buf); + free_extent_buffer(right); return 1; } + /* cow and double check */ - ret = btrfs_cow_block(trans, root, right_buf, upper, - slot + 1, &right_buf); + ret = btrfs_cow_block(trans, root, right, upper, + slot + 1, &right); if (ret) { - btrfs_block_release(root, right_buf); + free_extent_buffer(right); return 1; } - right = btrfs_buffer_leaf(right_buf); free_space = btrfs_leaf_free_space(root, right); if (free_space < data_size + sizeof(struct btrfs_item)) { - btrfs_block_release(root, right_buf); + free_extent_buffer(right); return 1; } - left_nritems = btrfs_header_nritems(&left->header); + left_nritems = btrfs_header_nritems(left); if (left_nritems == 0) { - btrfs_block_release(root, right_buf); + free_extent_buffer(right); return 1; } + for (i = left_nritems - 1; i >= 1; i--) { - item = left->items + i; + item = btrfs_item_nr(left, i); if (path->slots[0] == i) push_space += data_size + sizeof(*item); - if (btrfs_item_size(item) + sizeof(*item) + push_space > + if (btrfs_item_size(left, item) + sizeof(*item) + push_space > free_space) break; push_items++; - push_space += btrfs_item_size(item) + sizeof(*item); + push_space += btrfs_item_size(left, item) + sizeof(*item); } + if (push_items == 0) { - btrfs_block_release(root, right_buf); + free_extent_buffer(right); return 1; } + if (push_items == left_nritems) WARN_ON(1); - right_nritems = btrfs_header_nritems(&right->header); + /* push left to right */ - push_space = btrfs_item_end(left->items + left_nritems - push_items); + right_nritems = btrfs_header_nritems(right); + push_space = btrfs_item_end_nr(left, left_nritems - push_items); push_space -= leaf_data_end(root, left); + /* make room in the right data area */ - btrfs_memmove(root, right, btrfs_leaf_data(right) + - leaf_data_end(root, right) - push_space, - btrfs_leaf_data(right) + - leaf_data_end(root, right), BTRFS_LEAF_DATA_SIZE(root) - - leaf_data_end(root, right)); + data_end = leaf_data_end(root, right); + memmove_extent_buffer(right, + btrfs_leaf_data(right) + data_end - push_space, + btrfs_leaf_data(right) + data_end, + BTRFS_LEAF_DATA_SIZE(root) - data_end); + /* copy from the left data area */ - btrfs_memcpy(root, right, btrfs_leaf_data(right) + + copy_extent_buffer(right, left, btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) - push_space, btrfs_leaf_data(left) + leaf_data_end(root, left), push_space); - btrfs_memmove(root, right, right->items + push_items, right->items, - right_nritems * sizeof(struct btrfs_item)); + + memmove_extent_buffer(right, btrfs_item_nr_offset(push_items), + btrfs_item_nr_offset(0), + right_nritems * sizeof(struct btrfs_item)); + /* copy the items from left to right */ - btrfs_memcpy(root, right, right->items, left->items + - left_nritems - push_items, - push_items * sizeof(struct btrfs_item)); + copy_extent_buffer(right, left, btrfs_item_nr_offset(0), + btrfs_item_nr_offset(left_nritems - push_items), + push_items * sizeof(struct btrfs_item)); /* update the item pointers */ right_nritems += push_items; - btrfs_set_header_nritems(&right->header, right_nritems); + btrfs_set_header_nritems(right, right_nritems); push_space = BTRFS_LEAF_DATA_SIZE(root); for (i = 0; i < right_nritems; i++) { - btrfs_set_item_offset(right->items + i, push_space - - btrfs_item_size(right->items + i)); - push_space = btrfs_item_offset(right->items + i); + item = btrfs_item_nr(right, i); + btrfs_set_item_offset(right, item, push_space - + btrfs_item_size(right, item)); + push_space = btrfs_item_offset(right, item); } left_nritems -= push_items; - btrfs_set_header_nritems(&left->header, left_nritems); + btrfs_set_header_nritems(left, left_nritems); - btrfs_mark_buffer_dirty(left_buf); - btrfs_mark_buffer_dirty(right_buf); + btrfs_mark_buffer_dirty(left); + btrfs_mark_buffer_dirty(right); - btrfs_memcpy(root, upper_node, &upper_node->ptrs[slot + 1].key, - &right->items[0].key, sizeof(struct btrfs_disk_key)); + btrfs_item_key(right, &disk_key, 0); + btrfs_set_node_key(upper, &disk_key, slot + 1); btrfs_mark_buffer_dirty(upper); /* then fixup the leaf pointer in the path */ if (path->slots[0] >= left_nritems) { path->slots[0] -= left_nritems; - btrfs_block_release(root, path->nodes[0]); - path->nodes[0] = right_buf; + free_extent_buffer(path->nodes[0]); + path->nodes[0] = right; path->slots[1] += 1; } else { - btrfs_block_release(root, right_buf); + free_extent_buffer(right); } if (path->nodes[1]) check_node(root, path, 1); @@ -1436,10 +1526,9 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int data_size) { - struct buffer_head *right_buf = path->nodes[0]; - struct btrfs_leaf *right = btrfs_buffer_leaf(right_buf); - struct buffer_head *t; - struct btrfs_leaf *left; + struct btrfs_disk_key disk_key; + struct extent_buffer *right = path->nodes[0]; + struct extent_buffer *left; int slot; int i; int free_space; @@ -1447,119 +1536,128 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root int push_items = 0; struct btrfs_item *item; u32 old_left_nritems; + u32 right_nritems; int ret = 0; int wret; slot = path->slots[1]; - if (slot == 0) { + if (slot == 0) return 1; - } - if (!path->nodes[1]) { + if (!path->nodes[1]) return 1; - } - t = read_tree_block(root, - btrfs_node_blockptr(btrfs_buffer_node(path->nodes[1]), slot - 1)); - left = btrfs_buffer_leaf(t); + + left = read_tree_block(root, btrfs_node_blockptr(path->nodes[1], + slot - 1)); free_space = btrfs_leaf_free_space(root, left); if (free_space < data_size + sizeof(struct btrfs_item)) { - btrfs_block_release(root, t); + free_extent_buffer(left); return 1; } /* cow and double check */ - ret = btrfs_cow_block(trans, root, t, path->nodes[1], slot - 1, &t); + ret = btrfs_cow_block(trans, root, left, + path->nodes[1], slot - 1, &left); if (ret) { /* we hit -ENOSPC, but it isn't fatal here */ - btrfs_block_release(root, t); + free_extent_buffer(left); return 1; } - left = btrfs_buffer_leaf(t); free_space = btrfs_leaf_free_space(root, left); if (free_space < data_size + sizeof(struct btrfs_item)) { - btrfs_block_release(root, t); + free_extent_buffer(left); return 1; } - if (btrfs_header_nritems(&right->header) == 0) { - btrfs_block_release(root, t); + right_nritems = btrfs_header_nritems(right); + if (right_nritems == 0) { + free_extent_buffer(left); return 1; } - for (i = 0; i < btrfs_header_nritems(&right->header) - 1; i++) { - item = right->items + i; + for (i = 0; i < right_nritems - 1; i++) { + item = btrfs_item_nr(right, i); if (path->slots[0] == i) push_space += data_size + sizeof(*item); - if (btrfs_item_size(item) + sizeof(*item) + push_space > + if (btrfs_item_size(right, item) + sizeof(*item) + push_space > free_space) break; push_items++; - push_space += btrfs_item_size(item) + sizeof(*item); + push_space += btrfs_item_size(right, item) + sizeof(*item); } if (push_items == 0) { - btrfs_block_release(root, t); + free_extent_buffer(left); return 1; } - if (push_items == btrfs_header_nritems(&right->header)) + if (push_items == btrfs_header_nritems(right)) WARN_ON(1); + /* push data from right to left */ - btrfs_memcpy(root, left, left->items + - btrfs_header_nritems(&left->header), - right->items, push_items * sizeof(struct btrfs_item)); + copy_extent_buffer(left, right, + btrfs_item_nr_offset(btrfs_header_nritems(left)), + btrfs_item_nr_offset(0), + push_items * sizeof(struct btrfs_item)); + push_space = BTRFS_LEAF_DATA_SIZE(root) - - btrfs_item_offset(right->items + push_items -1); - btrfs_memcpy(root, left, btrfs_leaf_data(left) + + btrfs_item_offset_nr(right, push_items -1); + + copy_extent_buffer(left, right, btrfs_leaf_data(left) + leaf_data_end(root, left) - push_space, btrfs_leaf_data(right) + - btrfs_item_offset(right->items + push_items - 1), + btrfs_item_offset_nr(right, push_items - 1), push_space); - old_left_nritems = btrfs_header_nritems(&left->header); + old_left_nritems = btrfs_header_nritems(left); BUG_ON(old_left_nritems < 0); for (i = old_left_nritems; i < old_left_nritems + push_items; i++) { - u32 ioff = btrfs_item_offset(left->items + i); - btrfs_set_item_offset(left->items + i, ioff - - (BTRFS_LEAF_DATA_SIZE(root) - - btrfs_item_offset(left->items + - old_left_nritems - 1))); + u32 ioff; + item = btrfs_item_nr(left, i); + ioff = btrfs_item_offset(left, item); + btrfs_set_item_offset(left, item, + ioff - (BTRFS_LEAF_DATA_SIZE(root) - + btrfs_item_offset_nr(left, old_left_nritems - 1))); } - btrfs_set_header_nritems(&left->header, old_left_nritems + push_items); + btrfs_set_header_nritems(left, old_left_nritems + push_items); /* fixup right node */ - push_space = btrfs_item_offset(right->items + push_items - 1) - - leaf_data_end(root, right); - btrfs_memmove(root, right, btrfs_leaf_data(right) + - BTRFS_LEAF_DATA_SIZE(root) - push_space, - btrfs_leaf_data(right) + - leaf_data_end(root, right), push_space); - btrfs_memmove(root, right, right->items, right->items + push_items, - (btrfs_header_nritems(&right->header) - push_items) * - sizeof(struct btrfs_item)); - btrfs_set_header_nritems(&right->header, - btrfs_header_nritems(&right->header) - - push_items); + push_space = btrfs_item_offset_nr(right, push_items - 1) - + leaf_data_end(root, right); + memmove_extent_buffer(right, btrfs_leaf_data(right) + + BTRFS_LEAF_DATA_SIZE(root) - push_space, + btrfs_leaf_data(right) + + leaf_data_end(root, right), push_space); + + memmove_extent_buffer(right, btrfs_item_nr_offset(0), + btrfs_item_nr_offset(push_items), + (btrfs_header_nritems(right) - push_items) * + sizeof(struct btrfs_item)); + + right_nritems = btrfs_header_nritems(right) - push_items; + btrfs_set_header_nritems(right, right_nritems); push_space = BTRFS_LEAF_DATA_SIZE(root); - for (i = 0; i < btrfs_header_nritems(&right->header); i++) { - btrfs_set_item_offset(right->items + i, push_space - - btrfs_item_size(right->items + i)); - push_space = btrfs_item_offset(right->items + i); + for (i = 0; i < right_nritems; i++) { + item = btrfs_item_nr(right, i); + btrfs_set_item_offset(right, item, push_space - + btrfs_item_size(right, item)); + push_space = btrfs_item_offset(right, item); } - btrfs_mark_buffer_dirty(t); - btrfs_mark_buffer_dirty(right_buf); + btrfs_mark_buffer_dirty(left); + btrfs_mark_buffer_dirty(right); - wret = fixup_low_keys(trans, root, path, &right->items[0].key, 1); + btrfs_item_key(right, &disk_key, 0); + wret = fixup_low_keys(trans, root, path, &disk_key, 1); if (wret) ret = wret; /* then fixup the leaf pointer in the path */ if (path->slots[0] < push_items) { path->slots[0] += old_left_nritems; - btrfs_block_release(root, path->nodes[0]); - path->nodes[0] = t; + free_extent_buffer(path->nodes[0]); + path->nodes[0] = left; path->slots[1] -= 1; } else { - btrfs_block_release(root, t); + free_extent_buffer(left); path->slots[0] -= push_items; } BUG_ON(path->slots[0] < 0); @@ -1578,13 +1676,11 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_key *ins_key, struct btrfs_path *path, int data_size) { - struct buffer_head *l_buf; - struct btrfs_leaf *l; + struct extent_buffer *l; u32 nritems; int mid; int slot; - struct btrfs_leaf *right; - struct buffer_head *right_buffer; + struct extent_buffer *right; int space_needed = data_size + sizeof(struct btrfs_item); int data_copy_size; int rt_data_off; @@ -1603,8 +1699,7 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root if (wret < 0) return wret; } - l_buf = path->nodes[0]; - l = btrfs_buffer_leaf(l_buf); + l = path->nodes[0]; /* did the pushes work? */ if (btrfs_leaf_free_space(root, l) >= @@ -1617,36 +1712,38 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root return ret; } slot = path->slots[0]; - nritems = btrfs_header_nritems(&l->header); + nritems = btrfs_header_nritems(l); mid = (nritems + 1)/ 2; - right_buffer = btrfs_alloc_free_block(trans, root, l_buf->b_blocknr, 0); - if (IS_ERR(right_buffer)) - return PTR_ERR(right_buffer); - - right = btrfs_buffer_leaf(right_buffer); - memset(&right->header, 0, sizeof(right->header)); - btrfs_set_header_blocknr(&right->header, bh_blocknr(right_buffer)); - btrfs_set_header_generation(&right->header, trans->transid); - btrfs_set_header_owner(&right->header, root->root_key.objectid); - btrfs_set_header_level(&right->header, 0); - memcpy(right->header.fsid, root->fs_info->disk_super->fsid, - sizeof(right->header.fsid)); + right = btrfs_alloc_free_block(trans, root, + extent_buffer_blocknr(l), 0); + if (IS_ERR(right)) + return PTR_ERR(right); + + memset_extent_buffer(right, 0, 0, sizeof(struct btrfs_header)); + btrfs_set_header_blocknr(right, extent_buffer_blocknr(right)); + btrfs_set_header_generation(right, trans->transid); + btrfs_set_header_owner(right, root->root_key.objectid); + btrfs_set_header_level(right, 0); + write_extent_buffer(right, root->fs_info->fsid, + (unsigned long)btrfs_header_fsid(right), + BTRFS_FSID_SIZE); + if (mid <= slot) { if (nritems == 1 || leaf_space_used(l, mid, nritems - mid) + space_needed > BTRFS_LEAF_DATA_SIZE(root)) { if (slot >= nritems) { btrfs_cpu_key_to_disk(&disk_key, ins_key); - btrfs_set_header_nritems(&right->header, 0); + btrfs_set_header_nritems(right, 0); wret = insert_ptr(trans, root, path, &disk_key, - bh_blocknr(right_buffer), + extent_buffer_blocknr(right), path->slots[1] + 1, 1); if (wret) ret = wret; - btrfs_block_release(root, path->nodes[0]); - path->nodes[0] = right_buffer; + free_extent_buffer(path->nodes[0]); + path->nodes[0] = right; path->slots[0] = 0; path->slots[1] += 1; return ret; @@ -1659,15 +1756,15 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root BTRFS_LEAF_DATA_SIZE(root)) { if (slot == 0) { btrfs_cpu_key_to_disk(&disk_key, ins_key); - btrfs_set_header_nritems(&right->header, 0); + btrfs_set_header_nritems(right, 0); wret = insert_ptr(trans, root, path, &disk_key, - bh_blocknr(right_buffer), + extent_buffer_blocknr(right), path->slots[1], 1); if (wret) ret = wret; - btrfs_block_release(root, path->nodes[0]); - path->nodes[0] = right_buffer; + free_extent_buffer(path->nodes[0]); + path->nodes[0] = right; path->slots[0] = 0; if (path->slots[1] == 0) { wret = fixup_low_keys(trans, root, @@ -1681,61 +1778,74 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root double_split = 1; } } - btrfs_set_header_nritems(&right->header, nritems - mid); - data_copy_size = btrfs_item_end(l->items + mid) - - leaf_data_end(root, l); - btrfs_memcpy(root, right, right->items, l->items + mid, - (nritems - mid) * sizeof(struct btrfs_item)); - btrfs_memcpy(root, right, + nritems = nritems - mid; + btrfs_set_header_nritems(right, nritems); + data_copy_size = btrfs_item_end_nr(l, mid) - leaf_data_end(root, l); + + copy_extent_buffer(right, l, btrfs_item_nr_offset(0), + btrfs_item_nr_offset(mid), + nritems * sizeof(struct btrfs_item)); + + copy_extent_buffer(right, l, btrfs_leaf_data(right) + BTRFS_LEAF_DATA_SIZE(root) - data_copy_size, btrfs_leaf_data(l) + leaf_data_end(root, l), data_copy_size); + rt_data_off = BTRFS_LEAF_DATA_SIZE(root) - - btrfs_item_end(l->items + mid); + btrfs_item_end_nr(l, mid); - for (i = 0; i < btrfs_header_nritems(&right->header); i++) { - u32 ioff = btrfs_item_offset(right->items + i); - btrfs_set_item_offset(right->items + i, ioff + rt_data_off); + for (i = 0; i < nritems; i++) { + struct btrfs_item *item = btrfs_item_nr(right, i); + u32 ioff = btrfs_item_offset(right, item); + btrfs_set_item_offset(right, item, ioff + rt_data_off); } - btrfs_set_header_nritems(&l->header, mid); + btrfs_set_header_nritems(l, mid); ret = 0; - wret = insert_ptr(trans, root, path, &right->items[0].key, - bh_blocknr(right_buffer), path->slots[1] + 1, 1); + btrfs_item_key(right, &disk_key, 0); + wret = insert_ptr(trans, root, path, &disk_key, + extent_buffer_blocknr(right), path->slots[1] + 1, 1); if (wret) ret = wret; - btrfs_mark_buffer_dirty(right_buffer); - btrfs_mark_buffer_dirty(l_buf); + + btrfs_mark_buffer_dirty(right); + btrfs_mark_buffer_dirty(l); BUG_ON(path->slots[0] != slot); + if (mid <= slot) { - btrfs_block_release(root, path->nodes[0]); - path->nodes[0] = right_buffer; + free_extent_buffer(path->nodes[0]); + path->nodes[0] = right; path->slots[0] -= mid; path->slots[1] += 1; } else - btrfs_block_release(root, right_buffer); + free_extent_buffer(right); + BUG_ON(path->slots[0] < 0); check_node(root, path, 1); + check_leaf(root, path, 0); if (!double_split) return ret; - right_buffer = btrfs_alloc_free_block(trans, root, l_buf->b_blocknr, 0); - if (IS_ERR(right_buffer)) - return PTR_ERR(right_buffer); - - right = btrfs_buffer_leaf(right_buffer); - memset(&right->header, 0, sizeof(right->header)); - btrfs_set_header_blocknr(&right->header, bh_blocknr(right_buffer)); - btrfs_set_header_generation(&right->header, trans->transid); - btrfs_set_header_owner(&right->header, root->root_key.objectid); - btrfs_set_header_level(&right->header, 0); - memcpy(right->header.fsid, root->fs_info->disk_super->fsid, - sizeof(right->header.fsid)); + + right = btrfs_alloc_free_block(trans, root, + extent_buffer_blocknr(l), 0); + if (IS_ERR(right)) + return PTR_ERR(right); + + memset_extent_buffer(right, 0, 0, sizeof(struct btrfs_header)); + btrfs_set_header_blocknr(right, extent_buffer_blocknr(right)); + btrfs_set_header_generation(right, trans->transid); + btrfs_set_header_owner(right, root->root_key.objectid); + btrfs_set_header_level(right, 0); + write_extent_buffer(right, root->fs_info->fsid, + (unsigned long)btrfs_header_fsid(right), + BTRFS_FSID_SIZE); + btrfs_cpu_key_to_disk(&disk_key, ins_key); - btrfs_set_header_nritems(&right->header, 0); + btrfs_set_header_nritems(right, 0); wret = insert_ptr(trans, root, path, &disk_key, - bh_blocknr(right_buffer), + extent_buffer_blocknr(right), path->slots[1], 1); if (wret) ret = wret; @@ -1744,8 +1854,8 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root if (wret) ret = wret; } - btrfs_block_release(root, path->nodes[0]); - path->nodes[0] = right_buffer; + free_extent_buffer(path->nodes[0]); + path->nodes[0] = right; path->slots[0] = 0; check_node(root, path, 1); check_leaf(root, path, 0); @@ -1760,8 +1870,8 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans, int ret = 0; int slot; int slot_orig; - struct btrfs_leaf *leaf; - struct buffer_head *leaf_buf; + struct extent_buffer *leaf; + struct btrfs_item *item; u32 nritems; unsigned int data_end; unsigned int old_data_start; @@ -1770,15 +1880,14 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans, int i; slot_orig = path->slots[0]; - leaf_buf = path->nodes[0]; - leaf = btrfs_buffer_leaf(leaf_buf); + leaf = path->nodes[0]; - nritems = btrfs_header_nritems(&leaf->header); + nritems = btrfs_header_nritems(leaf); data_end = leaf_data_end(root, leaf); slot = path->slots[0]; - old_data_start = btrfs_item_offset(leaf->items + slot); - old_size = btrfs_item_size(leaf->items + slot); + old_data_start = btrfs_item_offset_nr(leaf, slot); + old_size = btrfs_item_size_nr(leaf, slot); BUG_ON(old_size <= new_size); size_diff = old_size - new_size; @@ -1790,32 +1899,38 @@ int btrfs_truncate_item(struct btrfs_trans_handle *trans, */ /* first correct the data pointers */ for (i = slot; i < nritems; i++) { - u32 ioff = btrfs_item_offset(leaf->items + i); - btrfs_set_item_offset(leaf->items + i, - ioff + size_diff); + u32 ioff; + item = btrfs_item_nr(leaf, i); + ioff = btrfs_item_offset(leaf, item); + btrfs_set_item_offset(leaf, item, ioff + size_diff); } /* shift the data */ - btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) + + memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + data_end + size_diff, btrfs_leaf_data(leaf) + data_end, old_data_start + new_size - data_end); - btrfs_set_item_size(leaf->items + slot, new_size); - btrfs_mark_buffer_dirty(leaf_buf); + + item = btrfs_item_nr(leaf, slot); + btrfs_set_item_size(leaf, item, new_size); + btrfs_mark_buffer_dirty(leaf); ret = 0; - if (btrfs_leaf_free_space(root, leaf) < 0) + if (btrfs_leaf_free_space(root, leaf) < 0) { + btrfs_print_leaf(root, leaf); BUG(); + } check_leaf(root, path, 0); return ret; } -int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_path *path, u32 data_size) +int btrfs_extend_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct btrfs_path *path, + u32 data_size) { int ret = 0; int slot; int slot_orig; - struct btrfs_leaf *leaf; - struct buffer_head *leaf_buf; + struct extent_buffer *leaf; + struct btrfs_item *item; u32 nritems; unsigned int data_end; unsigned int old_data; @@ -1823,16 +1938,17 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root int i; slot_orig = path->slots[0]; - leaf_buf = path->nodes[0]; - leaf = btrfs_buffer_leaf(leaf_buf); + leaf = path->nodes[0]; - nritems = btrfs_header_nritems(&leaf->header); + nritems = btrfs_header_nritems(leaf); data_end = leaf_data_end(root, leaf); - if (btrfs_leaf_free_space(root, leaf) < data_size) + if (btrfs_leaf_free_space(root, leaf) < data_size) { + btrfs_print_leaf(root, leaf); BUG(); + } slot = path->slots[0]; - old_data = btrfs_item_end(leaf->items + slot); + old_data = btrfs_item_end_nr(leaf, slot); BUG_ON(slot < 0); BUG_ON(slot >= nritems); @@ -1842,22 +1958,28 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root */ /* first correct the data pointers */ for (i = slot; i < nritems; i++) { - u32 ioff = btrfs_item_offset(leaf->items + i); - btrfs_set_item_offset(leaf->items + i, - ioff - data_size); + u32 ioff; + item = btrfs_item_nr(leaf, i); + ioff = btrfs_item_offset(leaf, item); + btrfs_set_item_offset(leaf, item, ioff - data_size); } + /* shift the data */ - btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) + + memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + data_end - data_size, btrfs_leaf_data(leaf) + data_end, old_data - data_end); + data_end = old_data; - old_size = btrfs_item_size(leaf->items + slot); - btrfs_set_item_size(leaf->items + slot, old_size + data_size); - btrfs_mark_buffer_dirty(leaf_buf); + old_size = btrfs_item_size_nr(leaf, slot); + item = btrfs_item_nr(leaf, slot); + btrfs_set_item_size(leaf, item, old_size + data_size); + btrfs_mark_buffer_dirty(leaf); ret = 0; - if (btrfs_leaf_free_space(root, leaf) < 0) + if (btrfs_leaf_free_space(root, leaf) < 0) { + btrfs_print_leaf(root, leaf); BUG(); + } check_leaf(root, path, 0); return ret; } @@ -1866,15 +1988,16 @@ int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root * Given a key and some data, insert an item into the tree. * This does all the path init required, making room in the tree if needed. */ -int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct btrfs_path *path, struct btrfs_key - *cpu_key, u32 data_size) +int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + struct btrfs_key *cpu_key, u32 data_size) { + struct extent_buffer *leaf; + struct btrfs_item *item; int ret = 0; int slot; int slot_orig; - struct btrfs_leaf *leaf; - struct buffer_head *leaf_buf; u32 nritems; unsigned int data_end; struct btrfs_disk_key disk_key; @@ -1884,6 +2007,7 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root /* create a root if there isn't one */ if (!root->node) BUG(); + ret = btrfs_search_slot(trans, root, cpu_key, path, data_size, 1); if (ret == 0) { return -EEXIST; @@ -1892,57 +2016,68 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root goto out; slot_orig = path->slots[0]; - leaf_buf = path->nodes[0]; - leaf = btrfs_buffer_leaf(leaf_buf); + leaf = path->nodes[0]; - nritems = btrfs_header_nritems(&leaf->header); + nritems = btrfs_header_nritems(leaf); data_end = leaf_data_end(root, leaf); if (btrfs_leaf_free_space(root, leaf) < sizeof(struct btrfs_item) + data_size) { BUG(); } + slot = path->slots[0]; BUG_ON(slot < 0); + if (slot != nritems) { int i; - unsigned int old_data = btrfs_item_end(leaf->items + slot); + unsigned int old_data = btrfs_item_end_nr(leaf, slot); + if (old_data < data_end) { + btrfs_print_leaf(root, leaf); + printk("slot %d old_data %d data_end %d\n", + slot, old_data, data_end); + BUG_ON(1); + } /* * item0..itemN ... dataN.offset..dataN.size .. data0.size */ /* first correct the data pointers */ for (i = slot; i < nritems; i++) { - u32 ioff = btrfs_item_offset(leaf->items + i); - btrfs_set_item_offset(leaf->items + i, - ioff - data_size); + u32 ioff; + item = btrfs_item_nr(leaf, i); + ioff = btrfs_item_offset(leaf, item); + btrfs_set_item_offset(leaf, item, ioff - data_size); } /* shift the items */ - btrfs_memmove(root, leaf, leaf->items + slot + 1, - leaf->items + slot, + memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot + 1), + btrfs_item_nr_offset(slot), (nritems - slot) * sizeof(struct btrfs_item)); /* shift the data */ - btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) + + memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + data_end - data_size, btrfs_leaf_data(leaf) + data_end, old_data - data_end); data_end = old_data; } + /* setup the item for the new data */ - btrfs_memcpy(root, leaf, &leaf->items[slot].key, &disk_key, - sizeof(struct btrfs_disk_key)); - btrfs_set_item_offset(leaf->items + slot, data_end - data_size); - btrfs_set_item_size(leaf->items + slot, data_size); - btrfs_set_header_nritems(&leaf->header, nritems + 1); - btrfs_mark_buffer_dirty(leaf_buf); + btrfs_set_item_key(leaf, &disk_key, slot); + item = btrfs_item_nr(leaf, slot); + btrfs_set_item_offset(leaf, item, data_end - data_size); + btrfs_set_item_size(leaf, item, data_size); + btrfs_set_header_nritems(leaf, nritems + 1); + btrfs_mark_buffer_dirty(leaf); ret = 0; if (slot == 0) ret = fixup_low_keys(trans, root, path, &disk_key, 1); - if (btrfs_leaf_free_space(root, leaf) < 0) + if (btrfs_leaf_free_space(root, leaf) < 0) { + btrfs_print_leaf(root, leaf); BUG(); + } check_leaf(root, path, 0); out: return ret; @@ -1958,17 +2093,17 @@ int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root { int ret = 0; struct btrfs_path *path; - u8 *ptr; + struct extent_buffer *leaf; + unsigned long ptr; path = btrfs_alloc_path(); BUG_ON(!path); ret = btrfs_insert_empty_item(trans, root, path, cpu_key, data_size); if (!ret) { - ptr = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), - path->slots[0], u8); - btrfs_memcpy(root, path->nodes[0]->b_data, - ptr, data, data_size); - btrfs_mark_buffer_dirty(path->nodes[0]); + leaf = path->nodes[0]; + ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); + write_extent_buffer(leaf, data, ptr, data_size); + btrfs_mark_buffer_dirty(leaf); } btrfs_free_path(path); return ret; @@ -1984,30 +2119,30 @@ int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root static int del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int level, int slot) { - struct btrfs_node *node; - struct buffer_head *parent = path->nodes[level]; + struct extent_buffer *parent = path->nodes[level]; u32 nritems; int ret = 0; int wret; - node = btrfs_buffer_node(parent); - nritems = btrfs_header_nritems(&node->header); + nritems = btrfs_header_nritems(parent); if (slot != nritems -1) { - btrfs_memmove(root, node, node->ptrs + slot, - node->ptrs + slot + 1, + memmove_extent_buffer(parent, + btrfs_node_key_ptr_offset(slot), + btrfs_node_key_ptr_offset(slot + 1), sizeof(struct btrfs_key_ptr) * (nritems - slot - 1)); } nritems--; - btrfs_set_header_nritems(&node->header, nritems); + btrfs_set_header_nritems(parent, nritems); if (nritems == 0 && parent == root->node) { - struct btrfs_header *header = btrfs_buffer_header(root->node); - BUG_ON(btrfs_header_level(header) != 1); + BUG_ON(btrfs_header_level(root->node) != 1); /* just turn the root into a leaf and break */ - btrfs_set_header_level(header, 0); + btrfs_set_header_level(root->node, 0); } else if (slot == 0) { - wret = fixup_low_keys(trans, root, path, &node->ptrs[0].key, - level + 1); + struct btrfs_disk_key disk_key; + + btrfs_node_key(parent, &disk_key, 0); + wret = fixup_low_keys(trans, root, path, &disk_key, level + 1); if (wret) ret = wret; } @@ -2023,59 +2158,67 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path) { int slot; - struct btrfs_leaf *leaf; - struct buffer_head *leaf_buf; + struct extent_buffer *leaf; + struct btrfs_item *item; int doff; int dsize; int ret = 0; int wret; u32 nritems; - leaf_buf = path->nodes[0]; - leaf = btrfs_buffer_leaf(leaf_buf); + leaf = path->nodes[0]; slot = path->slots[0]; - doff = btrfs_item_offset(leaf->items + slot); - dsize = btrfs_item_size(leaf->items + slot); - nritems = btrfs_header_nritems(&leaf->header); + doff = btrfs_item_offset_nr(leaf, slot); + dsize = btrfs_item_size_nr(leaf, slot); + nritems = btrfs_header_nritems(leaf); if (slot != nritems - 1) { int i; int data_end = leaf_data_end(root, leaf); - btrfs_memmove(root, leaf, btrfs_leaf_data(leaf) + + + memmove_extent_buffer(leaf, btrfs_leaf_data(leaf) + data_end + dsize, btrfs_leaf_data(leaf) + data_end, doff - data_end); + for (i = slot + 1; i < nritems; i++) { - u32 ioff = btrfs_item_offset(leaf->items + i); - btrfs_set_item_offset(leaf->items + i, ioff + dsize); + u32 ioff; + item = btrfs_item_nr(leaf, i); + ioff = btrfs_item_offset(leaf, item); + btrfs_set_item_offset(leaf, item, ioff + dsize); } - btrfs_memmove(root, leaf, leaf->items + slot, - leaf->items + slot + 1, + memmove_extent_buffer(leaf, btrfs_item_nr_offset(slot), + btrfs_item_nr_offset(slot + 1), sizeof(struct btrfs_item) * (nritems - slot - 1)); } - btrfs_set_header_nritems(&leaf->header, nritems - 1); + btrfs_set_header_nritems(leaf, nritems - 1); nritems--; + /* delete the leaf if we've emptied it */ if (nritems == 0) { - if (leaf_buf == root->node) { - btrfs_set_header_level(&leaf->header, 0); + if (leaf == root->node) { + btrfs_set_header_level(leaf, 0); } else { - clean_tree_block(trans, root, leaf_buf); - wait_on_buffer(leaf_buf); + clean_tree_block(trans, root, leaf); + wait_on_tree_block_writeback(root, leaf); wret = del_ptr(trans, root, path, 1, path->slots[1]); if (wret) ret = wret; wret = btrfs_free_extent(trans, root, - bh_blocknr(leaf_buf), 1, 1); + extent_buffer_blocknr(leaf), + 1, 1); if (wret) ret = wret; } } else { int used = leaf_space_used(leaf, 0, nritems); if (slot == 0) { + struct btrfs_disk_key disk_key; + + btrfs_item_key(leaf, &disk_key, 0); wret = fixup_low_keys(trans, root, path, - &leaf->items[0].key, 1); + &disk_key, 1); if (wret) ret = wret; } @@ -2087,34 +2230,40 @@ int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, * for possible call to del_ptr below */ slot = path->slots[1]; - get_bh(leaf_buf); + extent_buffer_get(leaf); + wret = push_leaf_left(trans, root, path, 1); if (wret < 0 && wret != -ENOSPC) ret = wret; - if (path->nodes[0] == leaf_buf && - btrfs_header_nritems(&leaf->header)) { + + if (path->nodes[0] == leaf && + btrfs_header_nritems(leaf)) { wret = push_leaf_right(trans, root, path, 1); if (wret < 0 && wret != -ENOSPC) ret = wret; } - if (btrfs_header_nritems(&leaf->header) == 0) { - u64 blocknr = bh_blocknr(leaf_buf); - clean_tree_block(trans, root, leaf_buf); - wait_on_buffer(leaf_buf); + + if (btrfs_header_nritems(leaf) == 0) { + u64 blocknr = extent_buffer_blocknr(leaf); + + clean_tree_block(trans, root, leaf); + wait_on_tree_block_writeback(root, leaf); + wret = del_ptr(trans, root, path, 1, slot); if (wret) ret = wret; - btrfs_block_release(root, leaf_buf); + + free_extent_buffer(leaf); wret = btrfs_free_extent(trans, root, blocknr, 1, 1); if (wret) ret = wret; } else { - btrfs_mark_buffer_dirty(leaf_buf); - btrfs_block_release(root, leaf_buf); + btrfs_mark_buffer_dirty(leaf); + free_extent_buffer(leaf); } } else { - btrfs_mark_buffer_dirty(leaf_buf); + btrfs_mark_buffer_dirty(leaf); } } return ret; @@ -2130,25 +2279,27 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path) int slot; int level = 1; u64 blocknr; - struct buffer_head *c; - struct btrfs_node *c_node; - struct buffer_head *next = NULL; + struct extent_buffer *c; + struct extent_buffer *next = NULL; while(level < BTRFS_MAX_LEVEL) { if (!path->nodes[level]) return 1; + slot = path->slots[level] + 1; c = path->nodes[level]; - c_node = btrfs_buffer_node(c); - if (slot >= btrfs_header_nritems(&c_node->header)) { + if (slot >= btrfs_header_nritems(c)) { level++; continue; } - blocknr = btrfs_node_blockptr(c_node, slot); + + blocknr = btrfs_node_blockptr(c, slot); if (next) - btrfs_block_release(root, next); + free_extent_buffer(next); + if (path->reada) reada_for_search(root, path, level, slot); + next = read_tree_block(root, blocknr); break; } @@ -2156,15 +2307,14 @@ int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path) while(1) { level--; c = path->nodes[level]; - btrfs_block_release(root, c); + free_extent_buffer(c); path->nodes[level] = next; path->slots[level] = 0; if (!level) break; if (path->reada) reada_for_search(root, path, level, 0); - next = read_tree_block(root, - btrfs_node_blockptr(btrfs_buffer_node(next), 0)); + next = read_tree_block(root, btrfs_node_blockptr(next, 0)); } return 0; } diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 800a3499cc3f..c4b829806855 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -20,10 +20,10 @@ #define __BTRFS__ #include -#include #include #include #include "bit-radix.h" +#include "extent_map.h" struct btrfs_trans_handle; struct btrfs_transaction; @@ -32,7 +32,7 @@ extern struct kmem_cache *btrfs_transaction_cachep; extern struct kmem_cache *btrfs_bit_radix_cachep; extern struct kmem_cache *btrfs_path_cachep; -#define BTRFS_MAGIC "_BtRfS_M" +#define BTRFS_MAGIC "_B2RfS_M" #define BTRFS_ROOT_TREE_OBJECTID 1ULL #define BTRFS_EXTENT_TREE_OBJECTID 2ULL @@ -78,41 +78,41 @@ extern struct kmem_cache *btrfs_path_cachep; */ struct btrfs_disk_key { __le64 objectid; - __le32 flags; + u8 type; __le64 offset; } __attribute__ ((__packed__)); struct btrfs_key { u64 objectid; - u32 flags; + u8 type; u64 offset; } __attribute__ ((__packed__)); +#define BTRFS_FSID_SIZE 16 /* * every tree block (leaf or node) starts with this header. */ struct btrfs_header { u8 csum[BTRFS_CSUM_SIZE]; - u8 fsid[16]; /* FS specific uuid */ + u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ __le64 blocknr; /* which block this node is supposed to live in */ __le64 generation; __le64 owner; - __le16 nritems; + __le32 nritems; __le16 flags; u8 level; } __attribute__ ((__packed__)); #define BTRFS_MAX_LEVEL 8 -#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \ +#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ sizeof(struct btrfs_header)) / \ (sizeof(struct btrfs_disk_key) + sizeof(u64))) #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) -#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize)) +#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ sizeof(struct btrfs_item) - \ sizeof(struct btrfs_file_extent_item)) -struct buffer_head; /* * the super block basically lists the main trees of the FS * it currently lacks any block count etc etc @@ -128,7 +128,9 @@ struct btrfs_super_block { __le64 total_blocks; __le64 blocks_used; __le64 root_dir_objectid; - __le32 blocksize; + __le32 sectorsize; + __le32 nodesize; + __le32 leafsize; } __attribute__ ((__packed__)); /* @@ -138,7 +140,7 @@ struct btrfs_super_block { struct btrfs_item { struct btrfs_disk_key key; __le32 offset; - __le16 size; + __le32 size; } __attribute__ ((__packed__)); /* @@ -176,7 +178,7 @@ struct btrfs_node { * used while walking the tree. */ struct btrfs_path { - struct buffer_head *nodes[BTRFS_MAX_LEVEL]; + struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; int slots[BTRFS_MAX_LEVEL]; int reada; int lowest_level; @@ -292,6 +294,7 @@ struct btrfs_block_group_cache { }; struct btrfs_fs_info { + u8 fsid[BTRFS_FSID_SIZE]; struct btrfs_root *extent_root; struct btrfs_root *tree_root; struct radix_tree_root fs_roots_radix; @@ -304,9 +307,8 @@ struct btrfs_fs_info { u64 generation; u64 last_trans_committed; struct btrfs_transaction *running_transaction; - struct btrfs_super_block *disk_super; struct btrfs_super_block super_copy; - struct buffer_head *sb_buffer; + struct extent_buffer *sb_buffer; struct super_block *sb; struct inode *btree_inode; struct mutex trans_mutex; @@ -325,8 +327,8 @@ struct btrfs_fs_info { * and for the extent tree extent_root root. */ struct btrfs_root { - struct buffer_head *node; - struct buffer_head *commit_root; + struct extent_buffer *node; + struct extent_buffer *commit_root; struct btrfs_root_item root_item; struct btrfs_key root_key; struct btrfs_fs_info *fs_info; @@ -336,7 +338,16 @@ struct btrfs_root { struct rw_semaphore snap_sem; u64 objectid; u64 last_trans; - u32 blocksize; + + /* data allocations are done in sectorsize units */ + u32 sectorsize; + + /* node allocations are done in nodesize units */ + u32 nodesize; + + /* leaf allocations are done in leafsize units */ + u32 leafsize; + u32 type; u64 highest_inode; u64 last_inode_alloc; @@ -347,12 +358,6 @@ struct btrfs_root { char *name; }; -/* the lower bits in the key flags defines the item type */ -#define BTRFS_KEY_TYPE_MAX 256 -#define BTRFS_KEY_TYPE_SHIFT 24 -#define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \ - BTRFS_KEY_TYPE_SHIFT) - /* * inode items have the data typically returned from stat and store other * info about object characteristics. There is one for every file and dir in @@ -402,246 +407,253 @@ struct btrfs_root { */ #define BTRFS_STRING_ITEM_KEY 253 +/* some macros to generate set/get funcs for the struct fields. This + * assumes there is a lefoo_to_cpu for every type, so lets make a simple + * one for u8: + */ +#define le8_to_cpu(v) (v) +#define cpu_to_le8(v) (v) +#define __le8 u8 + +#define read_eb_member(eb, ptr, type, member, result) ( \ + read_extent_buffer(eb, (char *)(result), \ + ((unsigned long)(ptr)) + \ + offsetof(type, member), \ + sizeof(((type *)0)->member))) + +#define write_eb_member(eb, ptr, type, member, result) ( \ + write_extent_buffer(eb, (char *)(result), \ + ((unsigned long)(ptr)) + \ + offsetof(type, member), \ + sizeof(((type *)0)->member))) + +#define BTRFS_SETGET_FUNCS(name, type, member, bits) \ +static inline u##bits btrfs_##name(struct extent_buffer *eb, \ + type *s) \ +{ \ + __le##bits res; \ + read_eb_member(eb, s, type, member, &res); \ + return le##bits##_to_cpu(res); \ +} \ +static inline void btrfs_set_##name(struct extent_buffer *eb, \ + type *s, u##bits val) \ +{ \ + val = cpu_to_le##bits(val); \ + write_eb_member(eb, s, type, member, &val); \ +} + +#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ +static inline u##bits btrfs_##name(struct extent_buffer *eb) \ +{ \ + __le##bits res; \ + read_eb_member(eb, NULL, type, member, &res); \ + return le##bits##_to_cpu(res); \ +} \ +static inline void btrfs_set_##name(struct extent_buffer *eb, \ + u##bits val) \ +{ \ + val = cpu_to_le##bits(val); \ + write_eb_member(eb, NULL, type, member, &val); \ +} -static inline u64 btrfs_block_group_used(struct btrfs_block_group_item *bi) -{ - return le64_to_cpu(bi->used); -} - -static inline void btrfs_set_block_group_used(struct - btrfs_block_group_item *bi, - u64 val) -{ - bi->used = cpu_to_le64(val); -} - -static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i) -{ - return le64_to_cpu(i->generation); -} - -static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i, - u64 val) -{ - i->generation = cpu_to_le64(val); -} - -static inline u64 btrfs_inode_size(struct btrfs_inode_item *i) -{ - return le64_to_cpu(i->size); -} - -static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val) -{ - i->size = cpu_to_le64(val); -} - -static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i) -{ - return le64_to_cpu(i->nblocks); -} - -static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val) -{ - i->nblocks = cpu_to_le64(val); -} - -static inline u64 btrfs_inode_block_group(struct btrfs_inode_item *i) -{ - return le64_to_cpu(i->block_group); -} - -static inline void btrfs_set_inode_block_group(struct btrfs_inode_item *i, - u64 val) -{ - i->block_group = cpu_to_le64(val); -} - -static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->nlink); -} - -static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val) -{ - i->nlink = cpu_to_le32(val); -} - -static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->uid); -} - -static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val) -{ - i->uid = cpu_to_le32(val); -} - -static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->gid); -} - -static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val) -{ - i->gid = cpu_to_le32(val); -} - -static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->mode); -} - -static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val) -{ - i->mode = cpu_to_le32(val); +#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ +static inline u##bits btrfs_##name(type *s) \ +{ \ + return le##bits##_to_cpu(s->member); \ +} \ +static inline void btrfs_set_##name(type *s, u##bits val) \ +{ \ + s->member = cpu_to_le##bits(val); \ } -static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i) -{ - return le32_to_cpu(i->rdev); -} +/* struct btrfs_block_group_item */ +BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, + used, 64); +BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, + used, 64); -static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val) -{ - i->rdev = cpu_to_le32(val); -} +/* struct btrfs_inode_item */ +BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); +BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); +BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); +BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); +BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); +BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); +BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); +BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); +BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 32); +BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); +BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, + compat_flags, 16); -static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i) +static inline struct btrfs_inode_timespec * +btrfs_inode_atime(struct btrfs_inode_item *inode_item) { - return le16_to_cpu(i->flags); + unsigned long ptr = (unsigned long)inode_item; + ptr += offsetof(struct btrfs_inode_item, atime); + return (struct btrfs_inode_timespec *)ptr; } -static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val) +static inline struct btrfs_inode_timespec * +btrfs_inode_mtime(struct btrfs_inode_item *inode_item) { - i->flags = cpu_to_le16(val); + unsigned long ptr = (unsigned long)inode_item; + ptr += offsetof(struct btrfs_inode_item, mtime); + return (struct btrfs_inode_timespec *)ptr; } -static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i) +static inline struct btrfs_inode_timespec * +btrfs_inode_ctime(struct btrfs_inode_item *inode_item) { - return le16_to_cpu(i->compat_flags); + unsigned long ptr = (unsigned long)inode_item; + ptr += offsetof(struct btrfs_inode_item, ctime); + return (struct btrfs_inode_timespec *)ptr; } -static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i, - u16 val) +static inline struct btrfs_inode_timespec * +btrfs_inode_otime(struct btrfs_inode_item *inode_item) { - i->compat_flags = cpu_to_le16(val); + unsigned long ptr = (unsigned long)inode_item; + ptr += offsetof(struct btrfs_inode_item, otime); + return (struct btrfs_inode_timespec *)ptr; } -static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts) -{ - return le64_to_cpu(ts->sec); -} +BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_inode_timespec, sec, 64); +BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_inode_timespec, nsec, 32); -static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts, - u64 val) -{ - ts->sec = cpu_to_le64(val); -} +/* struct btrfs_extent_item */ +BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); +BTRFS_SETGET_FUNCS(extent_owner, struct btrfs_extent_item, owner, 32); -static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts) -{ - return le32_to_cpu(ts->nsec); -} +BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, + refs, 32); +BTRFS_SETGET_STACK_FUNCS(stack_extent_owner, struct btrfs_extent_item, + owner, 32); -static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts, - u32 val) -{ - ts->nsec = cpu_to_le32(val); -} +/* struct btrfs_node */ +BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); -static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei) +static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) { - return le32_to_cpu(ei->refs); + unsigned long ptr; + ptr = offsetof(struct btrfs_node, ptrs) + + sizeof(struct btrfs_key_ptr) * nr; + return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); } -static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val) +static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, + int nr, u64 val) { - ei->refs = cpu_to_le32(val); + unsigned long ptr; + ptr = offsetof(struct btrfs_node, ptrs) + + sizeof(struct btrfs_key_ptr) * nr; + btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); } -static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei) +static unsigned long btrfs_node_key_ptr_offset(int nr) { - return le64_to_cpu(ei->owner); + return offsetof(struct btrfs_node, ptrs) + + sizeof(struct btrfs_key_ptr) * nr; } -static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val) +static void btrfs_node_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr) { - ei->owner = cpu_to_le64(val); + unsigned long ptr; + ptr = btrfs_node_key_ptr_offset(nr); + read_eb_member(eb, (struct btrfs_key_ptr *)ptr, + struct btrfs_key_ptr, key, disk_key); } - -static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr) +static inline void btrfs_set_node_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr) { - return le64_to_cpu(n->ptrs[nr].blockptr); + unsigned long ptr; + ptr = btrfs_node_key_ptr_offset(nr); + write_eb_member(eb, (struct btrfs_key_ptr *)ptr, + struct btrfs_key_ptr, key, disk_key); } +/* struct btrfs_item */ +BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); +BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); -static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr, - u64 val) +static inline unsigned long btrfs_item_nr_offset(int nr) { - n->ptrs[nr].blockptr = cpu_to_le64(val); + return offsetof(struct btrfs_leaf, items) + + sizeof(struct btrfs_item) * nr; } -static inline u32 btrfs_item_offset(struct btrfs_item *item) +static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, + int nr) { - return le32_to_cpu(item->offset); + return (struct btrfs_item *)btrfs_item_nr_offset(nr); } -static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val) +static inline u32 btrfs_item_end(struct extent_buffer *eb, + struct btrfs_item *item) { - item->offset = cpu_to_le32(val); + return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); } -static inline u32 btrfs_item_end(struct btrfs_item *item) +static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) { - return le32_to_cpu(item->offset) + le16_to_cpu(item->size); + return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); } -static inline u16 btrfs_item_size(struct btrfs_item *item) +static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) { - return le16_to_cpu(item->size); + return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); } -static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val) +static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) { - item->size = cpu_to_le16(val); + return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); } -static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d) +static inline void btrfs_item_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr) { - return le16_to_cpu(d->flags); + struct btrfs_item *item = btrfs_item_nr(eb, nr); + read_eb_member(eb, item, struct btrfs_item, key, disk_key); } -static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val) +static inline void btrfs_set_item_key(struct extent_buffer *eb, + struct btrfs_disk_key *disk_key, int nr) { - d->flags = cpu_to_le16(val); + struct btrfs_item *item = btrfs_item_nr(eb, nr); + write_eb_member(eb, item, struct btrfs_item, key, disk_key); } -static inline u8 btrfs_dir_type(struct btrfs_dir_item *d) -{ - return d->type; -} +/* struct btrfs_dir_item */ +BTRFS_SETGET_FUNCS(dir_flags, struct btrfs_dir_item, flags, 16); +BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); +BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); -static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val) +static inline void btrfs_dir_item_key(struct extent_buffer *eb, + struct btrfs_dir_item *item, + struct btrfs_disk_key *key) { - d->type = val; + read_eb_member(eb, item, struct btrfs_dir_item, location, key); } -static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d) +static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, + struct btrfs_dir_item *item, + struct btrfs_disk_key *key) { - return le16_to_cpu(d->name_len); + write_eb_member(eb, item, struct btrfs_dir_item, location, key); } -static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val) -{ - d->name_len = cpu_to_le16(val); -} +/* struct btrfs_disk_key */ +BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, + objectid, 64); +BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); +BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, struct btrfs_disk_key *disk) { cpu->offset = le64_to_cpu(disk->offset); - cpu->flags = le32_to_cpu(disk->flags); + cpu->type = disk->type; cpu->objectid = le64_to_cpu(disk->objectid); } @@ -649,400 +661,167 @@ static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, struct btrfs_key *cpu) { disk->offset = cpu_to_le64(cpu->offset); - disk->flags = cpu_to_le32(cpu->flags); + disk->type = cpu->type; disk->objectid = cpu_to_le64(cpu->objectid); } -static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk) -{ - return le64_to_cpu(disk->objectid); -} - -static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk, - u64 val) -{ - disk->objectid = cpu_to_le64(val); -} - -static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk) -{ - return le64_to_cpu(disk->offset); -} - -static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk, - u64 val) -{ - disk->offset = cpu_to_le64(val); -} - -static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk) -{ - return le32_to_cpu(disk->flags); -} - -static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk, - u32 val) -{ - disk->flags = cpu_to_le32(val); -} - -static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key) -{ - return le32_to_cpu(key->flags) >> BTRFS_KEY_TYPE_SHIFT; -} - -static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, - u32 val) -{ - u32 flags = btrfs_disk_key_flags(key); - BUG_ON(val >= BTRFS_KEY_TYPE_MAX); - val = val << BTRFS_KEY_TYPE_SHIFT; - flags = (flags & ~BTRFS_KEY_TYPE_MASK) | val; - btrfs_set_disk_key_flags(key, flags); -} - -static inline u32 btrfs_key_type(struct btrfs_key *key) -{ - return key->flags >> BTRFS_KEY_TYPE_SHIFT; -} - -static inline void btrfs_set_key_type(struct btrfs_key *key, u32 val) -{ - BUG_ON(val >= BTRFS_KEY_TYPE_MAX); - val = val << BTRFS_KEY_TYPE_SHIFT; - key->flags = (key->flags & ~(BTRFS_KEY_TYPE_MASK)) | val; -} - -static inline u64 btrfs_header_blocknr(struct btrfs_header *h) -{ - return le64_to_cpu(h->blocknr); -} - -static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr) -{ - h->blocknr = cpu_to_le64(blocknr); -} - -static inline u64 btrfs_header_generation(struct btrfs_header *h) +static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, + struct btrfs_key *key, int nr) { - return le64_to_cpu(h->generation); + struct btrfs_disk_key disk_key; + btrfs_node_key(eb, &disk_key, nr); + btrfs_disk_key_to_cpu(key, &disk_key); } -static inline void btrfs_set_header_generation(struct btrfs_header *h, - u64 val) +static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, + struct btrfs_key *key, int nr) { - h->generation = cpu_to_le64(val); + struct btrfs_disk_key disk_key; + btrfs_item_key(eb, &disk_key, nr); + btrfs_disk_key_to_cpu(key, &disk_key); } -static inline u64 btrfs_header_owner(struct btrfs_header *h) +static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, + struct btrfs_dir_item *item, + struct btrfs_key *key) { - return le64_to_cpu(h->owner); + struct btrfs_disk_key disk_key; + btrfs_dir_item_key(eb, item, &disk_key); + btrfs_disk_key_to_cpu(key, &disk_key); } -static inline void btrfs_set_header_owner(struct btrfs_header *h, - u64 val) -{ - h->owner = cpu_to_le64(val); -} - -static inline u16 btrfs_header_nritems(struct btrfs_header *h) -{ - return le16_to_cpu(h->nritems); -} - -static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val) -{ - h->nritems = cpu_to_le16(val); -} - -static inline u16 btrfs_header_flags(struct btrfs_header *h) -{ - return le16_to_cpu(h->flags); -} - -static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val) -{ - h->flags = cpu_to_le16(val); -} - -static inline int btrfs_header_level(struct btrfs_header *h) -{ - return h->level; -} - -static inline void btrfs_set_header_level(struct btrfs_header *h, int level) -{ - BUG_ON(level > BTRFS_MAX_LEVEL); - h->level = level; -} - -static inline int btrfs_is_leaf(struct btrfs_node *n) -{ - return (btrfs_header_level(&n->header) == 0); -} - -static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item) -{ - return le64_to_cpu(item->blocknr); -} - -static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val) -{ - item->blocknr = cpu_to_le64(val); -} - -static inline u64 btrfs_root_dirid(struct btrfs_root_item *item) -{ - return le64_to_cpu(item->root_dirid); -} - -static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val) -{ - item->root_dirid = cpu_to_le64(val); -} - -static inline u32 btrfs_root_refs(struct btrfs_root_item *item) -{ - return le32_to_cpu(item->refs); -} - -static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val) -{ - item->refs = cpu_to_le32(val); -} - -static inline u32 btrfs_root_flags(struct btrfs_root_item *item) -{ - return le32_to_cpu(item->flags); -} - -static inline void btrfs_set_root_flags(struct btrfs_root_item *item, u32 val) -{ - item->flags = cpu_to_le32(val); -} - -static inline void btrfs_set_root_blocks_used(struct btrfs_root_item *item, - u64 val) -{ - item->blocks_used = cpu_to_le64(val); -} - -static inline u64 btrfs_root_blocks_used(struct btrfs_root_item *item) -{ - return le64_to_cpu(item->blocks_used); -} - -static inline void btrfs_set_root_block_limit(struct btrfs_root_item *item, - u64 val) -{ - item->block_limit = cpu_to_le64(val); -} - -static inline u64 btrfs_root_block_limit(struct btrfs_root_item *item) -{ - return le64_to_cpu(item->block_limit); -} -static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s) +static inline u8 btrfs_key_type(struct btrfs_key *key) { - return le64_to_cpu(s->blocknr); + return key->type; } -static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val) +static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) { - s->blocknr = cpu_to_le64(val); + key->type = val; } -static inline u64 btrfs_super_generation(struct btrfs_super_block *s) -{ - return le64_to_cpu(s->generation); -} +/* struct btrfs_header */ +BTRFS_SETGET_HEADER_FUNCS(header_blocknr, struct btrfs_header, blocknr, 64); +BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, + generation, 64); +BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); +BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); +BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16); +BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); -static inline void btrfs_set_super_generation(struct btrfs_super_block *s, - u64 val) +static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) { - s->generation = cpu_to_le64(val); + unsigned long ptr = offsetof(struct btrfs_header, fsid); + return (u8 *)ptr; } -static inline u64 btrfs_super_root(struct btrfs_super_block *s) +static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) { - return le64_to_cpu(s->root); + unsigned long ptr = offsetof(struct btrfs_super_block, fsid); + return (u8 *)ptr; } -static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val) +static inline u8 *btrfs_header_csum(struct extent_buffer *eb) { - s->root = cpu_to_le64(val); + unsigned long ptr = offsetof(struct btrfs_header, csum); + return (u8 *)ptr; } -static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s) +static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) { - return le64_to_cpu(s->total_blocks); + return NULL; } -static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s, - u64 val) +static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) { - s->total_blocks = cpu_to_le64(val); + return NULL; } -static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s) +static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) { - return le64_to_cpu(s->blocks_used); + return NULL; } -static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s, - u64 val) +static inline int btrfs_is_leaf(struct extent_buffer *eb) { - s->blocks_used = cpu_to_le64(val); + return (btrfs_header_level(eb) == 0); } -static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s) -{ - return le32_to_cpu(s->blocksize); -} +/* struct btrfs_root_item */ +BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); +BTRFS_SETGET_FUNCS(disk_root_blocknr, struct btrfs_root_item, blocknr, 64); -static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, - u32 val) -{ - s->blocksize = cpu_to_le32(val); -} +BTRFS_SETGET_STACK_FUNCS(root_blocknr, struct btrfs_root_item, blocknr, 64); +BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); +BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); +BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); +BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, blocks_used, 64); +BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, block_limit, 64); -static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s) -{ - return le64_to_cpu(s->root_dir_objectid); -} +/* struct btrfs_super_block */ +BTRFS_SETGET_STACK_FUNCS(super_blocknr, struct btrfs_super_block, blocknr, 64); +BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, + generation, 64); +BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); +BTRFS_SETGET_STACK_FUNCS(super_total_blocks, struct btrfs_super_block, + total_blocks, 64); +BTRFS_SETGET_STACK_FUNCS(super_blocks_used, struct btrfs_super_block, + blocks_used, 64); +BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, + sectorsize, 32); +BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, + nodesize, 32); +BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, + leafsize, 32); +BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, + root_dir_objectid, 64); -static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64 - val) +static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) { - s->root_dir_objectid = cpu_to_le64(val); + return offsetof(struct btrfs_leaf, items); } -static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l) -{ - return (u8 *)l->items; -} +/* struct btrfs_file_extent_item */ +BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); -static inline int btrfs_file_extent_type(struct btrfs_file_extent_item *e) -{ - return e->type; -} -static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item *e, - u8 val) -{ - e->type = val; -} - -static inline char *btrfs_file_extent_inline_start(struct +static inline unsigned long btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) { - return (char *)(&e->disk_blocknr); + unsigned long offset = (unsigned long)e; + offset += offsetof(struct btrfs_file_extent_item, disk_blocknr); + return offset; } static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) { - return (unsigned long)(&((struct - btrfs_file_extent_item *)NULL)->disk_blocknr) + datasize; -} - -static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e) -{ - struct btrfs_file_extent_item *fe = NULL; - return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr); -} - -static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item - *e) -{ - return le64_to_cpu(e->disk_blocknr); + return offsetof(struct btrfs_file_extent_item, disk_blocknr) + datasize; } -static inline void btrfs_set_file_extent_disk_blocknr(struct - btrfs_file_extent_item - *e, u64 val) +static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, + struct btrfs_item *e) { - e->disk_blocknr = cpu_to_le64(val); + unsigned long offset; + offset = offsetof(struct btrfs_file_extent_item, disk_blocknr); + return btrfs_item_size(eb, e) - offset; } -static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e) -{ - return le64_to_cpu(e->generation); -} - -static inline void btrfs_set_file_extent_generation(struct - btrfs_file_extent_item *e, - u64 val) -{ - e->generation = cpu_to_le64(val); -} - -static inline u64 btrfs_file_extent_disk_num_blocks(struct - btrfs_file_extent_item *e) -{ - return le64_to_cpu(e->disk_num_blocks); -} - -static inline void btrfs_set_file_extent_disk_num_blocks(struct - btrfs_file_extent_item - *e, u64 val) -{ - e->disk_num_blocks = cpu_to_le64(val); -} - -static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e) -{ - return le64_to_cpu(e->offset); -} - -static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item - *e, u64 val) -{ - e->offset = cpu_to_le64(val); -} - -static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item - *e) -{ - return le64_to_cpu(e->num_blocks); -} - -static inline void btrfs_set_file_extent_num_blocks(struct - btrfs_file_extent_item *e, - u64 val) -{ - e->num_blocks = cpu_to_le64(val); -} +BTRFS_SETGET_FUNCS(file_extent_disk_blocknr, struct btrfs_file_extent_item, + disk_blocknr, 64); +BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, + generation, 64); +BTRFS_SETGET_FUNCS(file_extent_disk_num_blocks, struct btrfs_file_extent_item, + disk_num_blocks, 64); +BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, + offset, 64); +BTRFS_SETGET_FUNCS(file_extent_num_blocks, struct btrfs_file_extent_item, + num_blocks, 64); static inline struct btrfs_root *btrfs_sb(struct super_block *sb) { return sb->s_fs_info; } -static inline void btrfs_check_bounds(void *vptr, size_t len, - void *vcontainer, size_t container_len) -{ - char *ptr = vptr; - char *container = vcontainer; - WARN_ON(ptr < container); - WARN_ON(ptr + len > container + container_len); -} - -static inline void btrfs_memcpy(struct btrfs_root *root, - void *dst_block, - void *dst, const void *src, size_t nr) -{ - btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); - memcpy(dst, src, nr); -} - -static inline void btrfs_memmove(struct btrfs_root *root, - void *dst_block, - void *dst, void *src, size_t nr) -{ - btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); - memmove(dst, src, nr); -} - static inline int btrfs_set_root_name(struct btrfs_root *root, const char *name, int len) { @@ -1063,7 +842,11 @@ static inline int btrfs_set_root_name(struct btrfs_root *root, /* helper function to cast into the data area of the leaf. */ #define btrfs_item_ptr(leaf, slot, type) \ ((type *)(btrfs_leaf_data(leaf) + \ - btrfs_item_offset((leaf)->items + (slot)))) + btrfs_item_offset_nr(leaf, slot))) + +#define btrfs_item_ptr_offset(leaf, slot) \ + ((unsigned long)(btrfs_leaf_data(leaf) + \ + btrfs_item_offset_nr(leaf, slot))) /* mount option defines and helpers */ #define BTRFS_MOUNT_SUBVOL 0x000001 @@ -1084,7 +867,7 @@ struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, int data, int owner); int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root); -struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, +struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 hint, u64 empty_size); int btrfs_alloc_extent(struct btrfs_trans_handle *trans, @@ -1092,7 +875,7 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans, u64 num_blocks, u64 empty_size, u64 search_start, u64 search_end, struct btrfs_key *ins, int data); int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct buffer_head *buf); + struct extent_buffer *buf); int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 blocknr, u64 num_blocks, int pin); int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, @@ -1106,10 +889,10 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, int btrfs_free_block_groups(struct btrfs_fs_info *info); int btrfs_read_block_groups(struct btrfs_root *root); /* ctree.c */ -int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root - *root, struct buffer_head *buf, struct buffer_head - *parent, int parent_slot, struct buffer_head - **cow_ret); +int btrfs_cow_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, struct extent_buffer *buf, + struct extent_buffer *parent, int parent_slot, + struct extent_buffer **cow_ret); int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, u32 data_size); int btrfs_truncate_item(struct btrfs_trans_handle *trans, @@ -1120,7 +903,7 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_key *key, struct btrfs_path *p, int ins_len, int cow); int btrfs_realloc_node(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct buffer_head *parent, + struct btrfs_root *root, struct extent_buffer *parent, int cache_only, u64 *last_ret); void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); struct btrfs_path *btrfs_alloc_path(void); @@ -1134,7 +917,7 @@ int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, struct btrfs_key *cpu_key, u32 data_size); int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); -int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf); +int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root *root); /* root-item.c */ @@ -1179,9 +962,9 @@ int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); /* inode-item.c */ -int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root - *root, u64 objectid, struct btrfs_inode_item - *inode_item); +int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, u64 objectid); int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, struct btrfs_key *location, int mod); @@ -1224,8 +1007,6 @@ struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, struct btrfs_root *root); int btrfs_commit_write(struct file *file, struct page *page, unsigned from, unsigned to); -int btrfs_get_block(struct inode *inode, sector_t iblock, - struct buffer_head *result, int create); struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, size_t page_offset, u64 start, u64 end, int create); diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c index 49db5fa7ced3..6f19de41b878 100644 --- a/fs/btrfs/dir-item.c +++ b/fs/btrfs/dir-item.c @@ -33,7 +33,7 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle int ret; char *ptr; struct btrfs_item *item; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; ret = btrfs_insert_empty_item(trans, root, path, cpu_key, data_size); if (ret == -EEXIST) { @@ -49,11 +49,11 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle if (ret < 0) return ERR_PTR(ret); WARN_ON(ret > 0); - leaf = btrfs_buffer_leaf(path->nodes[0]); - item = leaf->items + path->slots[0]; + leaf = path->nodes[0]; + item = btrfs_item_nr(leaf, path->slots[0]); ptr = btrfs_item_ptr(leaf, path->slots[0], char); - BUG_ON(data_size > btrfs_item_size(item)); - ptr += btrfs_item_size(item) - data_size; + BUG_ON(data_size > btrfs_item_size(leaf, item)); + ptr += btrfs_item_size(leaf, item) - data_size; return (struct btrfs_dir_item *)ptr; } @@ -65,12 +65,13 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root int ret2 = 0; struct btrfs_path *path; struct btrfs_dir_item *dir_item; - char *name_ptr; + struct extent_buffer *leaf; + unsigned long name_ptr; struct btrfs_key key; + struct btrfs_disk_key disk_key; u32 data_size; key.objectid = dir; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); ret = btrfs_name_hash(name, name_len, &key.offset); BUG_ON(ret); @@ -85,14 +86,16 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root goto out; } - btrfs_cpu_key_to_disk(&dir_item->location, location); - btrfs_set_dir_type(dir_item, type); - btrfs_set_dir_flags(dir_item, 0); - btrfs_set_dir_name_len(dir_item, name_len); - name_ptr = (char *)(dir_item + 1); + leaf = path->nodes[0]; + btrfs_cpu_key_to_disk(&disk_key, location); + btrfs_set_dir_item_key(leaf, dir_item, &disk_key); + btrfs_set_dir_type(leaf, dir_item, type); + btrfs_set_dir_flags(leaf, dir_item, 0); + btrfs_set_dir_name_len(leaf, dir_item, name_len); + name_ptr = (unsigned long)(dir_item + 1); - btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len); - btrfs_mark_buffer_dirty(path->nodes[0]); + write_extent_buffer(leaf, name, name_ptr, name_len); + btrfs_mark_buffer_dirty(leaf); second_insert: /* FIXME, use some real flag for selecting the extra index */ @@ -110,13 +113,15 @@ second_insert: ret2 = PTR_ERR(dir_item); goto out; } - btrfs_cpu_key_to_disk(&dir_item->location, location); - btrfs_set_dir_type(dir_item, type); - btrfs_set_dir_flags(dir_item, 0); - btrfs_set_dir_name_len(dir_item, name_len); - name_ptr = (char *)(dir_item + 1); - btrfs_memcpy(root, path->nodes[0]->b_data, name_ptr, name, name_len); - btrfs_mark_buffer_dirty(path->nodes[0]); + leaf = path->nodes[0]; + btrfs_cpu_key_to_disk(&disk_key, location); + btrfs_set_dir_item_key(leaf, dir_item, &disk_key); + btrfs_set_dir_type(leaf, dir_item, type); + btrfs_set_dir_flags(leaf, dir_item, 0); + btrfs_set_dir_name_len(leaf, dir_item, name_len); + name_ptr = (unsigned long)(dir_item + 1); + write_extent_buffer(leaf, name, name_ptr, name_len); + btrfs_mark_buffer_dirty(leaf); out: btrfs_free_path(path); if (ret) @@ -136,14 +141,15 @@ struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, struct btrfs_key key; int ins_len = mod < 0 ? -1 : 0; int cow = mod != 0; - struct btrfs_disk_key *found_key; - struct btrfs_leaf *leaf; + struct btrfs_key found_key; + struct extent_buffer *leaf; key.objectid = dir; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_DIR_ITEM_KEY); + ret = btrfs_name_hash(name, name_len, &key.offset); BUG_ON(ret); + ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); if (ret < 0) return ERR_PTR(ret); @@ -152,12 +158,13 @@ struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, return NULL; path->slots[0]--; } - leaf = btrfs_buffer_leaf(path->nodes[0]); - found_key = &leaf->items[path->slots[0]].key; - if (btrfs_disk_key_objectid(found_key) != dir || - btrfs_disk_key_type(found_key) != BTRFS_DIR_ITEM_KEY || - btrfs_disk_key_offset(found_key) != key.offset) + leaf = path->nodes[0]; + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); + + if (found_key.objectid != dir || + btrfs_key_type(&found_key) != BTRFS_DIR_ITEM_KEY || + found_key.offset != key.offset) return NULL; return btrfs_match_dir_item_name(root, path, name, name_len); @@ -176,7 +183,6 @@ btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, int cow = mod != 0; key.objectid = dir; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_DIR_INDEX_KEY); key.offset = objectid; @@ -193,21 +199,22 @@ struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, const char *name, int name_len) { struct btrfs_dir_item *dir_item; - char *name_ptr; + unsigned long name_ptr; u32 total_len; u32 cur = 0; u32 this_len; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; - leaf = btrfs_buffer_leaf(path->nodes[0]); + leaf = path->nodes[0]; dir_item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_dir_item); - total_len = btrfs_item_size(leaf->items + path->slots[0]); + total_len = btrfs_item_size_nr(leaf, path->slots[0]); while(cur < total_len) { - this_len = sizeof(*dir_item) + btrfs_dir_name_len(dir_item); - name_ptr = (char *)(dir_item + 1); + this_len = sizeof(*dir_item) + + btrfs_dir_name_len(leaf, dir_item); + name_ptr = (unsigned long)(dir_item + 1); - if (btrfs_dir_name_len(dir_item) == name_len && - memcmp(name_ptr, name, name_len) == 0) + if (btrfs_dir_name_len(leaf, dir_item) == name_len && + memcmp_extent_buffer(leaf, name, name_ptr, name_len) == 0) return dir_item; cur += this_len; @@ -223,20 +230,23 @@ int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, struct btrfs_dir_item *di) { - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; u32 sub_item_len; u32 item_len; int ret = 0; - leaf = btrfs_buffer_leaf(path->nodes[0]); - sub_item_len = sizeof(*di) + btrfs_dir_name_len(di); - item_len = btrfs_item_size(leaf->items + path->slots[0]); - if (sub_item_len == btrfs_item_size(leaf->items + path->slots[0])) { + leaf = path->nodes[0]; + sub_item_len = sizeof(*di) + btrfs_dir_name_len(leaf, di); + item_len = btrfs_item_size_nr(leaf, path->slots[0]); + if (sub_item_len == item_len) { ret = btrfs_del_item(trans, root, path); } else { - char *ptr = (char *)di; - char *start = btrfs_item_ptr(leaf, path->slots[0], char); - btrfs_memmove(root, leaf, ptr, ptr + sub_item_len, + /* MARKER */ + unsigned long ptr = (unsigned long)di; + unsigned long start; + + start = btrfs_item_ptr_offset(leaf, path->slots[0]); + memmove_extent_buffer(leaf, ptr, ptr + sub_item_len, item_len - (ptr + sub_item_len - start)); ret = btrfs_truncate_item(trans, root, path, item_len - sub_item_len); diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index ef6d76f2ec20..0c1f90cbedb0 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -23,138 +23,132 @@ #include #include #include +#include // for block_sync_page #include "ctree.h" #include "disk-io.h" #include "transaction.h" #include "btrfs_inode.h" -u64 bh_blocknr(struct buffer_head *bh) +#if 0 +static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf) { - return bh->b_blocknr; -} - -static int check_tree_block(struct btrfs_root *root, struct buffer_head *buf) -{ - struct btrfs_node *node = btrfs_buffer_node(buf); - if (bh_blocknr(buf) != btrfs_header_blocknr(&node->header)) { - printk(KERN_CRIT "bh_blocknr(buf) is %llu, header is %llu\n", - (unsigned long long)bh_blocknr(buf), - (unsigned long long)btrfs_header_blocknr(&node->header)); + if (extent_buffer_blocknr(buf) != btrfs_header_blocknr(buf)) { + printk(KERN_CRIT "buf blocknr(buf) is %llu, header is %llu\n", + (unsigned long long)extent_buffer_blocknr(buf), + (unsigned long long)btrfs_header_blocknr(buf)); return 1; } return 0; } +#endif -struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr) +struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, + u64 blocknr) { - struct address_space *mapping = root->fs_info->btree_inode->i_mapping; - int blockbits = root->fs_info->sb->s_blocksize_bits; - unsigned long index = blocknr >> (PAGE_CACHE_SHIFT - blockbits); - struct page *page; - struct buffer_head *bh; - struct buffer_head *head; - struct buffer_head *ret = NULL; - - - page = find_lock_page(mapping, index); - if (!page) - return NULL; - - if (!page_has_buffers(page)) - goto out_unlock; + struct inode *btree_inode = root->fs_info->btree_inode; + return find_extent_buffer(&BTRFS_I(btree_inode)->extent_tree, + blocknr * root->sectorsize, + root->sectorsize, GFP_NOFS); +} - head = page_buffers(page); - bh = head; - do { - if (buffer_mapped(bh) && bh_blocknr(bh) == blocknr) { - ret = bh; - get_bh(bh); - goto out_unlock; - } - bh = bh->b_this_page; - } while (bh != head); -out_unlock: - unlock_page(page); - page_cache_release(page); - return ret; +struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, + u64 blocknr) +{ + struct inode *btree_inode = root->fs_info->btree_inode; + return alloc_extent_buffer(&BTRFS_I(btree_inode)->extent_tree, + blocknr * root->sectorsize, + root->sectorsize, GFP_NOFS); } -int btrfs_map_bh_to_logical(struct btrfs_root *root, struct buffer_head *bh, - u64 logical) +struct extent_map *btree_get_extent(struct inode *inode, struct page *page, + size_t page_offset, u64 start, u64 end, + int create) { - if (logical == 0) { - bh->b_bdev = NULL; - bh->b_blocknr = 0; - set_buffer_mapped(bh); - } else { - map_bh(bh, root->fs_info->sb, logical); + struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; + struct extent_map *em; + int ret; + +again: + em = lookup_extent_mapping(em_tree, start, end); + if (em) { + goto out; } - return 0; + em = alloc_extent_map(GFP_NOFS); + if (!em) { + em = ERR_PTR(-ENOMEM); + goto out; + } + em->start = 0; + em->end = (i_size_read(inode) & ~((u64)PAGE_CACHE_SIZE -1)) - 1; + em->block_start = 0; + em->block_end = em->end; + em->bdev = inode->i_sb->s_bdev; + ret = add_extent_mapping(em_tree, em); + if (ret == -EEXIST) { + free_extent_map(em); + em = NULL; + goto again; + } else if (ret) { + em = ERR_PTR(ret); + } +out: + return em; } -struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root, - u64 blocknr) +static int btree_writepage(struct page *page, struct writeback_control *wbc) { - struct address_space *mapping = root->fs_info->btree_inode->i_mapping; - int blockbits = root->fs_info->sb->s_blocksize_bits; - unsigned long index = blocknr >> (PAGE_CACHE_SHIFT - blockbits); - struct page *page; - struct buffer_head *bh; - struct buffer_head *head; - struct buffer_head *ret = NULL; - int err; - u64 first_block = index << (PAGE_CACHE_SHIFT - blockbits); + struct extent_map_tree *tree; + tree = &BTRFS_I(page->mapping->host)->extent_tree; + return extent_write_full_page(tree, page, btree_get_extent, wbc); +} +int btree_readpage(struct file *file, struct page *page) +{ + struct extent_map_tree *tree; + tree = &BTRFS_I(page->mapping->host)->extent_tree; + return extent_read_full_page(tree, page, btree_get_extent); +} - page = find_or_create_page(mapping, index, GFP_NOFS); - if (!page) - return NULL; +static int btree_releasepage(struct page *page, gfp_t unused_gfp_flags) +{ + struct extent_map_tree *tree; + int ret; - if (!page_has_buffers(page)) - create_empty_buffers(page, root->fs_info->sb->s_blocksize, 0); - head = page_buffers(page); - bh = head; - do { - if (!buffer_mapped(bh)) { - err = btrfs_map_bh_to_logical(root, bh, first_block); - BUG_ON(err); - } - if (bh_blocknr(bh) == blocknr) { - ret = bh; - get_bh(bh); - goto out_unlock; - } - bh = bh->b_this_page; - first_block++; - } while (bh != head); -out_unlock: - unlock_page(page); - if (ret) - touch_buffer(ret); - page_cache_release(page); + BUG_ON(page->private != 1); + tree = &BTRFS_I(page->mapping->host)->extent_tree; + ret = try_release_extent_mapping(tree, page); + if (ret == 1) { + ClearPagePrivate(page); + set_page_private(page, 0); + page_cache_release(page); + } return ret; } -static int btree_get_block(struct inode *inode, sector_t iblock, - struct buffer_head *bh, int create) +static void btree_invalidatepage(struct page *page, unsigned long offset) { - int err; - struct btrfs_root *root = BTRFS_I(bh->b_page->mapping->host)->root; - err = btrfs_map_bh_to_logical(root, bh, iblock); - return err; + struct extent_map_tree *tree; + tree = &BTRFS_I(page->mapping->host)->extent_tree; + extent_invalidatepage(tree, page, offset); + btree_releasepage(page, GFP_NOFS); } int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len, char *result) { + return 0; +#if 0 u32 crc; crc = crc32c(0, data, len); memcpy(result, &crc, BTRFS_CRC32_SIZE); return 0; +#endif } -static int csum_tree_block(struct btrfs_root *root, struct buffer_head *bh, +#if 0 +static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf, int verify) { + return 0; char result[BTRFS_CRC32_SIZE]; int ret; struct btrfs_node *node; @@ -176,7 +170,9 @@ static int csum_tree_block(struct btrfs_root *root, struct buffer_head *bh, } return 0; } +#endif +#if 0 static int btree_writepage(struct page *page, struct writeback_control *wbc) { struct buffer_head *bh; @@ -195,87 +191,65 @@ static int btree_writepage(struct page *page, struct writeback_control *wbc) } while (bh != head); return block_write_full_page(page, btree_get_block, wbc); } - -static int btree_readpage(struct file * file, struct page * page) -{ - return block_read_full_page(page, btree_get_block); -} +#endif static struct address_space_operations btree_aops = { .readpage = btree_readpage, .writepage = btree_writepage, + .releasepage = btree_releasepage, + .invalidatepage = btree_invalidatepage, .sync_page = block_sync_page, }; int readahead_tree_block(struct btrfs_root *root, u64 blocknr) { - struct buffer_head *bh = NULL; + struct extent_buffer *buf = NULL; + struct inode *btree_inode = root->fs_info->btree_inode; int ret = 0; - bh = btrfs_find_create_tree_block(root, blocknr); - if (!bh) + buf = btrfs_find_create_tree_block(root, blocknr); + if (!buf) return 0; - if (buffer_uptodate(bh)) { - ret = 1; - goto done; - } - if (test_set_buffer_locked(bh)) { - ret = 1; - goto done; - } - if (!buffer_uptodate(bh)) { - get_bh(bh); - bh->b_end_io = end_buffer_read_sync; - submit_bh(READ, bh); - } else { - unlock_buffer(bh); - ret = 1; - } -done: - brelse(bh); + read_extent_buffer_pages(&BTRFS_I(btree_inode)->extent_tree, + buf, 0); + free_extent_buffer(buf); return ret; } -struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr) +struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr) { - struct buffer_head *bh = NULL; - - bh = btrfs_find_create_tree_block(root, blocknr); - if (!bh) - return bh; - if (buffer_uptodate(bh)) - goto uptodate; - lock_buffer(bh); - if (!buffer_uptodate(bh)) { - get_bh(bh); - bh->b_end_io = end_buffer_read_sync; - submit_bh(READ, bh); - wait_on_buffer(bh); - if (!buffer_uptodate(bh)) - goto fail; - } else { - unlock_buffer(bh); - } -uptodate: - if (!buffer_checked(bh)) { - csum_tree_block(root, bh, 1); - set_buffer_checked(bh); - } - if (check_tree_block(root, bh)) - goto fail; - return bh; -fail: - brelse(bh); - return NULL; + struct extent_buffer *buf = NULL; + struct inode *btree_inode = root->fs_info->btree_inode; + + buf = btrfs_find_create_tree_block(root, blocknr); + if (!buf) + return NULL; + read_extent_buffer_pages(&BTRFS_I(btree_inode)->extent_tree, + buf, 1); + return buf; } int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct buffer_head *buf) + struct extent_buffer *buf) { - WARN_ON(atomic_read(&buf->b_count) == 0); - lock_buffer(buf); - clear_buffer_dirty(buf); - unlock_buffer(buf); + struct inode *btree_inode = root->fs_info->btree_inode; + clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, buf); + return 0; +} + +int wait_on_tree_block_writeback(struct btrfs_root *root, + struct extent_buffer *buf) +{ + struct inode *btree_inode = root->fs_info->btree_inode; + wait_on_extent_buffer_writeback(&BTRFS_I(btree_inode)->extent_tree, + buf); + return 0; +} + +int set_tree_block_dirty(struct btrfs_root *root, struct extent_buffer *buf) +{ + struct inode *btree_inode = root->fs_info->btree_inode; + set_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, buf); return 0; } @@ -287,7 +261,9 @@ static int __setup_root(int blocksize, root->node = NULL; root->inode = NULL; root->commit_root = NULL; - root->blocksize = blocksize; + root->sectorsize = blocksize; + root->nodesize = blocksize; + root->leafsize = blocksize; root->ref_cows = 0; root->fs_info = fs_info; root->objectid = objectid; @@ -332,7 +308,7 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info, struct btrfs_root *root; struct btrfs_root *tree_root = fs_info->tree_root; struct btrfs_path *path; - struct btrfs_leaf *l; + struct extent_buffer *l; u64 highest_inode; int ret = 0; @@ -361,11 +337,10 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info, ret = -ENOENT; goto out; } - l = btrfs_buffer_leaf(path->nodes[0]); - memcpy(&root->root_item, - btrfs_item_ptr(l, path->slots[0], struct btrfs_root_item), + l = path->nodes[0]; + read_extent_buffer(l, &root->root_item, + btrfs_item_ptr_offset(l, path->slots[0]), sizeof(root->root_item)); - memcpy(&root->root_key, location, sizeof(*location)); ret = 0; out: btrfs_release_path(root, path); @@ -406,21 +381,21 @@ struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, (unsigned long)root->root_key.objectid, root); if (ret) { - brelse(root->node); + free_extent_buffer(root->node); kfree(root); return ERR_PTR(ret); } ret = btrfs_set_root_name(root, name, namelen); if (ret) { - brelse(root->node); + free_extent_buffer(root->node); kfree(root); return ERR_PTR(ret); } ret = btrfs_sysfs_add_root(root); if (ret) { - brelse(root->node); + free_extent_buffer(root->node); kfree(root->name); kfree(root); return ERR_PTR(ret); @@ -471,6 +446,9 @@ struct btrfs_root *open_ctree(struct super_block *sb) fs_info->btree_inode->i_nlink = 1; fs_info->btree_inode->i_size = sb->s_bdev->bd_inode->i_size; fs_info->btree_inode->i_mapping->a_ops = &btree_aops; + extent_map_tree_init(&BTRFS_I(fs_info->btree_inode)->extent_tree, + fs_info->btree_inode->i_mapping, + GFP_NOFS); fs_info->do_barriers = 1; fs_info->closing = 0; @@ -493,10 +471,14 @@ struct btrfs_root *open_ctree(struct super_block *sb) if (!fs_info->sb_buffer) goto fail_iput; - disk_super = (struct btrfs_super_block *)fs_info->sb_buffer->b_data; - fs_info->disk_super = disk_super; - memcpy(&fs_info->super_copy, disk_super, sizeof(fs_info->super_copy)); + read_extent_buffer(fs_info->sb_buffer, &fs_info->super_copy, 0, + sizeof(fs_info->super_copy)); + + read_extent_buffer(fs_info->sb_buffer, fs_info->fsid, + (unsigned long)btrfs_super_fsid(fs_info->sb_buffer), + BTRFS_FSID_SIZE); + disk_super = &fs_info->super_copy; if (!btrfs_super_root(disk_super)) goto fail_sb_buffer; @@ -530,9 +512,9 @@ struct btrfs_root *open_ctree(struct super_block *sb) return tree_root; fail_tree_root: - btrfs_block_release(tree_root, tree_root->node); + free_extent_buffer(tree_root->node); fail_sb_buffer: - btrfs_block_release(tree_root, fs_info->sb_buffer); + free_extent_buffer(fs_info->sb_buffer); fail_iput: iput(fs_info->btree_inode); fail: @@ -546,31 +528,13 @@ int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root) { int ret; - struct buffer_head *bh = root->fs_info->sb_buffer; - - lock_buffer(bh); - WARN_ON(atomic_read(&bh->b_count) < 1); - clear_buffer_dirty(bh); - csum_tree_block(root, bh, 0); - bh->b_end_io = end_buffer_write_sync; - get_bh(bh); - if (root->fs_info->do_barriers) - ret = submit_bh(WRITE_BARRIER, bh); - else - ret = submit_bh(WRITE, bh); - if (ret == -EOPNOTSUPP) { - get_bh(bh); - lock_buffer(bh); - set_buffer_uptodate(bh); - root->fs_info->do_barriers = 0; - ret = submit_bh(WRITE, bh); - } - wait_on_buffer(bh); - if (!buffer_uptodate(bh)) { - WARN_ON(1); - return -EIO; - } - return 0; + struct extent_buffer *super = root->fs_info->sb_buffer; + struct inode *btree_inode = root->fs_info->btree_inode; + + set_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, super); + ret = sync_page_range_nolock(btree_inode, btree_inode->i_mapping, + super->start, super->len); + return ret; } int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) @@ -581,9 +545,9 @@ int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root) if (root->inode) iput(root->inode); if (root->node) - brelse(root->node); + free_extent_buffer(root->node); if (root->commit_root) - brelse(root->commit_root); + free_extent_buffer(root->commit_root); if (root->name) kfree(root->name); kfree(root); @@ -629,12 +593,10 @@ int close_ctree(struct btrfs_root *root) mutex_unlock(&fs_info->fs_mutex); if (fs_info->extent_root->node) - btrfs_block_release(fs_info->extent_root, - fs_info->extent_root->node); + free_extent_buffer(fs_info->extent_root->node); if (fs_info->tree_root->node) - btrfs_block_release(fs_info->tree_root, - fs_info->tree_root->node); - btrfs_block_release(root, fs_info->sb_buffer); + free_extent_buffer(fs_info->tree_root->node); + free_extent_buffer(fs_info->sb_buffer); truncate_inode_pages(fs_info->btree_inode->i_mapping, 0); iput(fs_info->btree_inode); @@ -645,25 +607,32 @@ int close_ctree(struct btrfs_root *root) return 0; } -void btrfs_mark_buffer_dirty(struct buffer_head *bh) +int btrfs_buffer_uptodate(struct extent_buffer *buf) +{ + struct inode *btree_inode = buf->pages[0]->mapping->host; + return extent_buffer_uptodate(&BTRFS_I(btree_inode)->extent_tree, buf); +} + +int btrfs_set_buffer_uptodate(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(bh->b_page->mapping->host)->root; - u64 transid = btrfs_header_generation(btrfs_buffer_header(bh)); + struct inode *btree_inode = buf->pages[0]->mapping->host; + return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->extent_tree, + buf); +} - WARN_ON(!atomic_read(&bh->b_count)); +void btrfs_mark_buffer_dirty(struct extent_buffer *buf) +{ + struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root; + u64 transid = btrfs_header_generation(buf); + struct inode *btree_inode = root->fs_info->btree_inode; if (transid != root->fs_info->generation) { printk(KERN_CRIT "transid mismatch buffer %llu, found %Lu running %Lu\n", - (unsigned long long)bh->b_blocknr, + (unsigned long long)extent_buffer_blocknr(buf), transid, root->fs_info->generation); WARN_ON(1); } - mark_buffer_dirty(bh); -} - -void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf) -{ - brelse(buf); + set_extent_buffer_dirty(&BTRFS_I(btree_inode)->extent_tree, buf); } void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index fc6b520c6e0b..70d9413c599f 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -19,68 +19,35 @@ #ifndef __DISKIO__ #define __DISKIO__ -#include - #define BTRFS_SUPER_INFO_OFFSET (16 * 1024) -enum btrfs_bh_state_bits { - BH_Checked = BH_PrivateStart, - BH_Defrag, - BH_DefragDone, -}; -BUFFER_FNS(Checked, checked); -BUFFER_FNS(Defrag, defrag); -BUFFER_FNS(DefragDone, defrag_done); - -static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh) -{ - return (struct btrfs_node *)bh->b_data; -} - -static inline struct btrfs_leaf *btrfs_buffer_leaf(struct buffer_head *bh) -{ - return (struct btrfs_leaf *)bh->b_data; -} - -static inline struct btrfs_header *btrfs_buffer_header(struct buffer_head *bh) -{ - return &((struct btrfs_node *)bh->b_data)->header; -} - -struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr); +struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr); int readahead_tree_block(struct btrfs_root *root, u64 blocknr); -struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root, - u64 blocknr); -int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct buffer_head *buf); -int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct buffer_head *buf); +struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, + u64 blocknr); int clean_tree_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct buffer_head *buf); -int btrfs_commit_transaction(struct btrfs_trans_handle *trans, - struct btrfs_root *root); + struct btrfs_root *root, struct extent_buffer *buf); struct btrfs_root *open_ctree(struct super_block *sb); int close_ctree(struct btrfs_root *root); -void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf); int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root); -struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr); -int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len, - char *result); +struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, + u64 blocknr); struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_key *location, const char *name, int namelen); struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_fs_info *fs_info, struct btrfs_key *location); -u64 bh_blocknr(struct buffer_head *bh); int btrfs_insert_dev_radix(struct btrfs_root *root, struct block_device *bdev, u64 device_id, u64 block_start, u64 num_blocks); -int btrfs_map_bh_to_logical(struct btrfs_root *root, struct buffer_head *bh, - u64 logical); void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr); int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root); -void btrfs_mark_buffer_dirty(struct buffer_head *bh); +void btrfs_mark_buffer_dirty(struct extent_buffer *buf); +int btrfs_buffer_uptodate(struct extent_buffer *buf); +int btrfs_set_buffer_uptodate(struct extent_buffer *buf); +int wait_on_tree_block_writeback(struct btrfs_root *root, + struct extent_buffer *buf); #endif diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index f261a8326cdf..089c41cbca74 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -33,7 +33,7 @@ static int cache_block_group(struct btrfs_root *root, struct btrfs_path *path; int ret; struct btrfs_key key; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; struct radix_tree_root *extent_radix; int slot; u64 i; @@ -56,7 +56,6 @@ static int cache_block_group(struct btrfs_root *root, path->reada = 2; first_free = block_group->key.objectid; key.objectid = block_group->key.objectid; - key.flags = 0; key.offset = 0; btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY); @@ -69,9 +68,9 @@ static int cache_block_group(struct btrfs_root *root, path->slots[0]--; while(1) { - leaf = btrfs_buffer_leaf(path->nodes[0]); + leaf = path->nodes[0]; slot = path->slots[0]; - if (slot >= btrfs_header_nritems(&leaf->header)) { + if (slot >= btrfs_header_nritems(leaf)) { ret = btrfs_next_leaf(root, path); if (ret < 0) goto err; @@ -82,7 +81,7 @@ static int cache_block_group(struct btrfs_root *root, } } - btrfs_disk_key_to_cpu(&key, &leaf->items[slot].key); + btrfs_item_key_to_cpu(leaf, &key, slot); if (key.objectid < block_group->key.objectid) { if (key.objectid + key.offset > first_free) first_free = key.objectid + key.offset; @@ -116,8 +115,7 @@ next: hole_size = block_group->key.objectid + block_group->key.offset - last; for (i = 0; i < hole_size; i++) { - set_radix_bit(extent_radix, - last + i); + set_radix_bit(extent_radix, last + i); } } block_group->cached = 1; @@ -366,7 +364,7 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, struct btrfs_path *path; int ret; struct btrfs_key key; - struct btrfs_leaf *l; + struct extent_buffer *l; struct btrfs_extent_item *item; u32 refs; @@ -375,7 +373,6 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, return -ENOMEM; key.objectid = blocknr; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY); key.offset = num_blocks; ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path, @@ -386,10 +383,10 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, BUG(); } BUG_ON(ret != 0); - l = btrfs_buffer_leaf(path->nodes[0]); + l = path->nodes[0]; item = btrfs_item_ptr(l, path->slots[0], struct btrfs_extent_item); - refs = btrfs_extent_refs(item); - btrfs_set_extent_refs(item, refs + 1); + refs = btrfs_extent_refs(l, item); + btrfs_set_extent_refs(l, item, refs + 1); btrfs_mark_buffer_dirty(path->nodes[0]); btrfs_release_path(root->fs_info->extent_root, path); @@ -414,23 +411,25 @@ static int lookup_extent_ref(struct btrfs_trans_handle *trans, struct btrfs_path *path; int ret; struct btrfs_key key; - struct btrfs_leaf *l; + struct extent_buffer *l; struct btrfs_extent_item *item; path = btrfs_alloc_path(); key.objectid = blocknr; key.offset = num_blocks; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY); ret = btrfs_search_slot(trans, root->fs_info->extent_root, &key, path, 0, 0); if (ret < 0) goto out; - if (ret != 0) + if (ret != 0) { + btrfs_print_leaf(root, path->nodes[0]); + printk("failed to find block number %Lu\n", blocknr); BUG(); - l = btrfs_buffer_leaf(path->nodes[0]); + } + l = path->nodes[0]; item = btrfs_item_ptr(l, path->slots[0], struct btrfs_extent_item); - *refs = btrfs_extent_refs(item); + *refs = btrfs_extent_refs(l, item); out: btrfs_free_path(path); return 0; @@ -439,16 +438,16 @@ out: int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root) { - return btrfs_inc_extent_ref(trans, root, bh_blocknr(root->node), 1); + return btrfs_inc_extent_ref(trans, root, + extent_buffer_blocknr(root->node), 1); } int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, - struct buffer_head *buf) + struct extent_buffer *buf) { u64 blocknr; - struct btrfs_node *buf_node; - struct btrfs_leaf *buf_leaf; - struct btrfs_disk_key *key; + u32 nritems; + struct btrfs_key key; struct btrfs_file_extent_item *fi; int i; int leaf; @@ -458,31 +457,31 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, if (!root->ref_cows) return 0; - buf_node = btrfs_buffer_node(buf); - leaf = btrfs_is_leaf(buf_node); - buf_leaf = btrfs_buffer_leaf(buf); - for (i = 0; i < btrfs_header_nritems(&buf_node->header); i++) { + + leaf = btrfs_is_leaf(buf); + nritems = btrfs_header_nritems(buf); + for (i = 0; i < nritems; i++) { if (leaf) { u64 disk_blocknr; - key = &buf_leaf->items[i].key; - if (btrfs_disk_key_type(key) != BTRFS_EXTENT_DATA_KEY) + btrfs_item_key_to_cpu(buf, &key, i); + if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY) continue; - fi = btrfs_item_ptr(buf_leaf, i, + fi = btrfs_item_ptr(buf, i, struct btrfs_file_extent_item); - if (btrfs_file_extent_type(fi) == + if (btrfs_file_extent_type(buf, fi) == BTRFS_FILE_EXTENT_INLINE) continue; - disk_blocknr = btrfs_file_extent_disk_blocknr(fi); + disk_blocknr = btrfs_file_extent_disk_blocknr(buf, fi); if (disk_blocknr == 0) continue; ret = btrfs_inc_extent_ref(trans, root, disk_blocknr, - btrfs_file_extent_disk_num_blocks(fi)); + btrfs_file_extent_disk_num_blocks(buf, fi)); if (ret) { faili = i; goto fail; } } else { - blocknr = btrfs_node_blockptr(buf_node, i); + blocknr = btrfs_node_blockptr(buf, i); ret = btrfs_inc_extent_ref(trans, root, blocknr, 1); if (ret) { faili = i; @@ -496,22 +495,23 @@ fail: for (i =0; i < faili; i++) { if (leaf) { u64 disk_blocknr; - key = &buf_leaf->items[i].key; - if (btrfs_disk_key_type(key) != BTRFS_EXTENT_DATA_KEY) + btrfs_item_key_to_cpu(buf, &key, i); + if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY) continue; - fi = btrfs_item_ptr(buf_leaf, i, + fi = btrfs_item_ptr(buf, i, struct btrfs_file_extent_item); - if (btrfs_file_extent_type(fi) == + if (btrfs_file_extent_type(buf, fi) == BTRFS_FILE_EXTENT_INLINE) continue; - disk_blocknr = btrfs_file_extent_disk_blocknr(fi); + disk_blocknr = btrfs_file_extent_disk_blocknr(buf, fi); if (disk_blocknr == 0) continue; err = btrfs_free_extent(trans, root, disk_blocknr, - btrfs_file_extent_disk_num_blocks(fi), 0); + btrfs_file_extent_disk_num_blocks(buf, + fi), 0); BUG_ON(err); } else { - blocknr = btrfs_node_blockptr(buf_node, i); + blocknr = btrfs_node_blockptr(buf, i); err = btrfs_free_extent(trans, root, blocknr, 1, 0); BUG_ON(err); } @@ -527,16 +527,18 @@ static int write_one_cache_group(struct btrfs_trans_handle *trans, int ret; int pending_ret; struct btrfs_root *extent_root = root->fs_info->extent_root; - struct btrfs_block_group_item *bi; + unsigned long bi; + struct extent_buffer *leaf; ret = btrfs_search_slot(trans, extent_root, &cache->key, path, 0, 1); if (ret < 0) goto fail; BUG_ON(ret); - bi = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0], - struct btrfs_block_group_item); - memcpy(bi, &cache->item, sizeof(*bi)); - btrfs_mark_buffer_dirty(path->nodes[0]); + + leaf = path->nodes[0]; + bi = btrfs_item_ptr_offset(leaf, path->slots[0]); + write_extent_buffer(leaf, &cache->item, bi, sizeof(cache->item)); + btrfs_mark_buffer_dirty(leaf); btrfs_release_path(extent_root, path); fail: finish_current_insert(trans, extent_root); @@ -768,11 +770,11 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, struct unsigned long gang[8]; struct btrfs_fs_info *info = extent_root->fs_info; - btrfs_set_extent_refs(&extent_item, 1); + btrfs_set_stack_extent_refs(&extent_item, 1); ins.offset = 1; - ins.flags = 0; btrfs_set_key_type(&ins, BTRFS_EXTENT_ITEM_KEY); - btrfs_set_extent_owner(&extent_item, extent_root->root_key.objectid); + btrfs_set_stack_extent_owner(&extent_item, + extent_root->root_key.objectid); while(1) { ret = find_first_radix_bit(&info->extent_ins_radix, gang, 0, @@ -795,23 +797,20 @@ static int finish_current_insert(struct btrfs_trans_handle *trans, struct static int pin_down_block(struct btrfs_root *root, u64 blocknr, int pending) { int err; - struct btrfs_header *header; - struct buffer_head *bh; + struct extent_buffer *buf; if (!pending) { - bh = btrfs_find_tree_block(root, blocknr); - if (bh) { - if (buffer_uptodate(bh)) { + buf = btrfs_find_tree_block(root, blocknr); + if (buf) { + if (btrfs_buffer_uptodate(buf)) { u64 transid = root->fs_info->running_transaction->transid; - header = btrfs_buffer_header(bh); - if (btrfs_header_generation(header) == - transid) { - btrfs_block_release(root, bh); + if (btrfs_header_generation(buf) == transid) { + free_extent_buffer(buf); return 0; } } - btrfs_block_release(root, bh); + free_extent_buffer(buf); } err = set_radix_bit(&root->fs_info->pinned_radix, blocknr); if (!err) { @@ -839,12 +838,12 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root struct btrfs_key key; struct btrfs_fs_info *info = root->fs_info; struct btrfs_root *extent_root = info->extent_root; + struct extent_buffer *leaf; int ret; struct btrfs_extent_item *ei; u32 refs; key.objectid = blocknr; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY); key.offset = num_blocks; @@ -856,12 +855,16 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root if (ret < 0) return ret; BUG_ON(ret); - ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0], + + leaf = path->nodes[0]; + ei = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item); - BUG_ON(ei->refs == 0); - refs = btrfs_extent_refs(ei) - 1; - btrfs_set_extent_refs(ei, refs); - btrfs_mark_buffer_dirty(path->nodes[0]); + refs = btrfs_extent_refs(leaf, ei); + BUG_ON(refs == 0); + refs -= 1; + btrfs_set_extent_refs(leaf, ei, refs); + btrfs_mark_buffer_dirty(leaf); + if (refs == 0) { u64 super_blocks_used, root_blocks_used; @@ -876,8 +879,8 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root super_blocks_used - num_blocks); /* block accounting for root item */ - root_blocks_used = btrfs_root_blocks_used(&root->root_item); - btrfs_set_root_blocks_used(&root->root_item, + root_blocks_used = btrfs_root_used(&root->root_item); + btrfs_set_root_used(&root->root_item, root_blocks_used - num_blocks); ret = btrfs_del_item(trans, extent_root, path); @@ -984,7 +987,7 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root u64 test_block; u64 orig_search_start = search_start; int start_found; - struct btrfs_leaf *l; + struct extent_buffer *l; struct btrfs_root * root = orig_root->fs_info->extent_root; struct btrfs_fs_info *info = root->fs_info; int total_needed = num_blocks; @@ -994,10 +997,10 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root int wrapped = 0; WARN_ON(num_blocks < 1); - ins->flags = 0; btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY); - level = btrfs_header_level(btrfs_buffer_header(root->node)); + level = btrfs_header_level(root->node); + if (search_end == (u64)-1) search_end = btrfs_super_total_blocks(&info->super_copy); if (hint_block) { @@ -1034,8 +1037,9 @@ check_failed: path->slots[0]--; } - l = btrfs_buffer_leaf(path->nodes[0]); - btrfs_disk_key_to_cpu(&key, &l->items[path->slots[0]].key); + l = path->nodes[0]; + btrfs_item_key_to_cpu(l, &key, path->slots[0]); + /* * a rare case, go back one key if we hit a block group item * instead of an extent item @@ -1055,9 +1059,9 @@ check_failed: } while (1) { - l = btrfs_buffer_leaf(path->nodes[0]); + l = path->nodes[0]; slot = path->slots[0]; - if (slot >= btrfs_header_nritems(&l->header)) { + if (slot >= btrfs_header_nritems(l)) { ret = btrfs_next_leaf(root, path); if (ret == 0) continue; @@ -1075,7 +1079,7 @@ check_failed: goto check_pending; } - btrfs_disk_key_to_cpu(&key, &l->items[slot].key); + btrfs_item_key_to_cpu(l, &key, slot); if (key.objectid >= search_start && key.objectid > last_block && start_found) { if (last_block < search_start) @@ -1183,8 +1187,8 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans, struct btrfs_root *extent_root = info->extent_root; struct btrfs_extent_item extent_item; - btrfs_set_extent_refs(&extent_item, 1); - btrfs_set_extent_owner(&extent_item, owner); + btrfs_set_stack_extent_refs(&extent_item, 1); + btrfs_set_stack_extent_owner(&extent_item, owner); WARN_ON(num_blocks < 1); ret = find_free_extent(trans, root, num_blocks, empty_size, @@ -1201,8 +1205,8 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans, num_blocks); /* block accounting for root item */ - root_blocks_used = btrfs_root_blocks_used(&root->root_item); - btrfs_set_root_blocks_used(&root->root_item, root_blocks_used + + root_blocks_used = btrfs_root_used(&root->root_item); + btrfs_set_root_used(&root->root_item, root_blocks_used + num_blocks); if (root == extent_root) { @@ -1241,13 +1245,13 @@ update_block: * helper function to allocate a block for a given tree * returns the tree buffer or NULL. */ -struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, - struct btrfs_root *root, u64 hint, - u64 empty_size) +struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, u64 hint, + u64 empty_size) { struct btrfs_key ins; int ret; - struct buffer_head *buf; + struct extent_buffer *buf; ret = btrfs_alloc_extent(trans, root, root->root_key.objectid, 1, empty_size, hint, (u64)-1, &ins, 0); @@ -1260,53 +1264,57 @@ struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, btrfs_free_extent(trans, root, ins.objectid, 1, 0); return ERR_PTR(-ENOMEM); } - WARN_ON(buffer_dirty(buf)); - set_buffer_uptodate(buf); + btrfs_set_buffer_uptodate(buf); + set_extent_dirty(&trans->transaction->dirty_pages, buf->start, + buf->start + buf->len - 1, GFP_NOFS); + /* set_buffer_checked(buf); set_buffer_defrag(buf); - set_radix_bit(&trans->transaction->dirty_pages, buf->b_page->index); + */ + /* FIXME!!!!!!!!!!!!!!!! + set_radix_bit(&trans->transaction->dirty_pages, buf->pages[0]->index); + */ trans->blocks_used++; return buf; } static int drop_leaf_ref(struct btrfs_trans_handle *trans, - struct btrfs_root *root, struct buffer_head *cur) + struct btrfs_root *root, struct extent_buffer *leaf) { - struct btrfs_disk_key *key; - struct btrfs_leaf *leaf; + struct btrfs_key key; struct btrfs_file_extent_item *fi; int i; int nritems; int ret; - BUG_ON(!btrfs_is_leaf(btrfs_buffer_node(cur))); - leaf = btrfs_buffer_leaf(cur); - nritems = btrfs_header_nritems(&leaf->header); + BUG_ON(!btrfs_is_leaf(leaf)); + nritems = btrfs_header_nritems(leaf); for (i = 0; i < nritems; i++) { u64 disk_blocknr; - key = &leaf->items[i].key; - if (btrfs_disk_key_type(key) != BTRFS_EXTENT_DATA_KEY) + + btrfs_item_key_to_cpu(leaf, &key, i); + if (btrfs_key_type(&key) != BTRFS_EXTENT_DATA_KEY) continue; fi = btrfs_item_ptr(leaf, i, struct btrfs_file_extent_item); - if (btrfs_file_extent_type(fi) == BTRFS_FILE_EXTENT_INLINE) + if (btrfs_file_extent_type(leaf, fi) == + BTRFS_FILE_EXTENT_INLINE) continue; /* * FIXME make sure to insert a trans record that * repeats the snapshot del on crash */ - disk_blocknr = btrfs_file_extent_disk_blocknr(fi); + disk_blocknr = btrfs_file_extent_disk_blocknr(leaf, fi); if (disk_blocknr == 0) continue; ret = btrfs_free_extent(trans, root, disk_blocknr, - btrfs_file_extent_disk_num_blocks(fi), - 0); + btrfs_file_extent_disk_num_blocks(leaf, fi), 0); BUG_ON(ret); } return 0; } static void reada_walk_down(struct btrfs_root *root, - struct btrfs_node *node) + struct extent_buffer *node) { int i; u32 nritems; @@ -1314,7 +1322,7 @@ static void reada_walk_down(struct btrfs_root *root, int ret; u32 refs; - nritems = btrfs_header_nritems(&node->header); + nritems = btrfs_header_nritems(node); for (i = 0; i < nritems; i++) { blocknr = btrfs_node_blockptr(node, i); ret = lookup_extent_ref(NULL, root, blocknr, 1, &refs); @@ -1337,16 +1345,17 @@ static void reada_walk_down(struct btrfs_root *root, static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, int *level) { - struct buffer_head *next; - struct buffer_head *cur; + struct extent_buffer *next; + struct extent_buffer *cur; u64 blocknr; int ret; u32 refs; WARN_ON(*level < 0); WARN_ON(*level >= BTRFS_MAX_LEVEL); - ret = lookup_extent_ref(trans, root, bh_blocknr(path->nodes[*level]), - 1, &refs); + ret = lookup_extent_ref(trans, root, + extent_buffer_blocknr(path->nodes[*level]), + 1, &refs); BUG_ON(ret); if (refs > 1) goto out; @@ -1360,21 +1369,20 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root cur = path->nodes[*level]; if (*level > 0 && path->slots[*level] == 0) - reada_walk_down(root, btrfs_buffer_node(cur)); + reada_walk_down(root, cur); - if (btrfs_header_level(btrfs_buffer_header(cur)) != *level) + if (btrfs_header_level(cur) != *level) WARN_ON(1); if (path->slots[*level] >= - btrfs_header_nritems(btrfs_buffer_header(cur))) + btrfs_header_nritems(cur)) break; if (*level == 0) { ret = drop_leaf_ref(trans, root, cur); BUG_ON(ret); break; } - blocknr = btrfs_node_blockptr(btrfs_buffer_node(cur), - path->slots[*level]); + blocknr = btrfs_node_blockptr(cur, path->slots[*level]); ret = lookup_extent_ref(trans, root, blocknr, 1, &refs); BUG_ON(ret); if (refs != 1) { @@ -1384,8 +1392,8 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root continue; } next = btrfs_find_tree_block(root, blocknr); - if (!next || !buffer_uptodate(next)) { - brelse(next); + if (!next || !btrfs_buffer_uptodate(next)) { + free_extent_buffer(next); mutex_unlock(&root->fs_info->fs_mutex); next = read_tree_block(root, blocknr); mutex_lock(&root->fs_info->fs_mutex); @@ -1395,7 +1403,7 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root BUG_ON(ret); if (refs != 1) { path->slots[*level]++; - brelse(next); + free_extent_buffer(next); ret = btrfs_free_extent(trans, root, blocknr, 1, 1); BUG_ON(ret); @@ -1404,17 +1412,17 @@ static int walk_down_tree(struct btrfs_trans_handle *trans, struct btrfs_root } WARN_ON(*level <= 0); if (path->nodes[*level-1]) - btrfs_block_release(root, path->nodes[*level-1]); + free_extent_buffer(path->nodes[*level-1]); path->nodes[*level-1] = next; - *level = btrfs_header_level(btrfs_buffer_header(next)); + *level = btrfs_header_level(next); path->slots[*level] = 0; } out: WARN_ON(*level < 0); WARN_ON(*level >= BTRFS_MAX_LEVEL); ret = btrfs_free_extent(trans, root, - bh_blocknr(path->nodes[*level]), 1, 1); - btrfs_block_release(root, path->nodes[*level]); + extent_buffer_blocknr(path->nodes[*level]), 1, 1); + free_extent_buffer(path->nodes[*level]); path->nodes[*level] = NULL; *level += 1; BUG_ON(ret); @@ -1436,24 +1444,24 @@ static int walk_up_tree(struct btrfs_trans_handle *trans, struct btrfs_root for(i = *level; i < BTRFS_MAX_LEVEL - 1 && path->nodes[i]; i++) { slot = path->slots[i]; - if (slot < btrfs_header_nritems( - btrfs_buffer_header(path->nodes[i])) - 1) { - struct btrfs_node *node; - node = btrfs_buffer_node(path->nodes[i]); + if (slot < btrfs_header_nritems(path->nodes[i]) - 1) { + struct extent_buffer *node; + struct btrfs_disk_key disk_key; + node = path->nodes[i]; path->slots[i]++; *level = i; WARN_ON(*level == 0); + btrfs_node_key(node, &disk_key, path->slots[i]); memcpy(&root_item->drop_progress, - &node->ptrs[path->slots[i]].key, - sizeof(root_item->drop_progress)); + &disk_key, sizeof(disk_key)); root_item->drop_level = i; return 0; } else { ret = btrfs_free_extent(trans, root, - bh_blocknr(path->nodes[*level]), - 1, 1); + extent_buffer_blocknr(path->nodes[*level]), + 1, 1); BUG_ON(ret); - btrfs_block_release(root, path->nodes[*level]); + free_extent_buffer(path->nodes[*level]); path->nodes[*level] = NULL; *level = i + 1; } @@ -1480,15 +1488,15 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root path = btrfs_alloc_path(); BUG_ON(!path); - level = btrfs_header_level(btrfs_buffer_header(root->node)); + level = btrfs_header_level(root->node); orig_level = level; if (btrfs_disk_key_objectid(&root_item->drop_progress) == 0) { path->nodes[level] = root->node; path->slots[level] = 0; } else { struct btrfs_key key; - struct btrfs_disk_key *found_key; - struct btrfs_node *node; + struct btrfs_disk_key found_key; + struct extent_buffer *node; btrfs_disk_key_to_cpu(&key, &root_item->drop_progress); level = root_item->drop_level; @@ -1498,10 +1506,10 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root ret = wret; goto out; } - node = btrfs_buffer_node(path->nodes[level]); - found_key = &node->ptrs[path->slots[level]].key; - WARN_ON(memcmp(found_key, &root_item->drop_progress, - sizeof(*found_key))); + node = path->nodes[level]; + btrfs_node_key(node, &found_key, path->slots[level]); + WARN_ON(memcmp(&found_key, &root_item->drop_progress, + sizeof(found_key))); } while(1) { wret = walk_down_tree(trans, root, path, &level); @@ -1516,12 +1524,12 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root if (wret < 0) ret = wret; ret = -EAGAIN; - get_bh(root->node); + extent_buffer_get(root->node); break; } for (i = 0; i <= orig_level; i++) { if (path->nodes[i]) { - btrfs_block_release(root, path->nodes[i]); + free_extent_buffer(path->nodes[i]); path->nodes[i] = 0; } } @@ -1581,13 +1589,12 @@ int btrfs_read_block_groups(struct btrfs_root *root) struct btrfs_path *path; int ret; int err = 0; - struct btrfs_block_group_item *bi; struct btrfs_block_group_cache *cache; struct btrfs_fs_info *info = root->fs_info; struct radix_tree_root *radix; struct btrfs_key key; struct btrfs_key found_key; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; u64 group_size_blocks; u64 used; @@ -1596,7 +1603,6 @@ int btrfs_read_block_groups(struct btrfs_root *root) root = info->extent_root; key.objectid = 0; key.offset = group_size_blocks; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_BLOCK_GROUP_ITEM_KEY); path = btrfs_alloc_path(); @@ -1610,18 +1616,18 @@ int btrfs_read_block_groups(struct btrfs_root *root) err = ret; break; } - leaf = btrfs_buffer_leaf(path->nodes[0]); - btrfs_disk_key_to_cpu(&found_key, - &leaf->items[path->slots[0]].key); + leaf = path->nodes[0]; + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); cache = kmalloc(sizeof(*cache), GFP_NOFS); if (!cache) { err = -1; break; } - bi = btrfs_item_ptr(leaf, path->slots[0], - struct btrfs_block_group_item); - if (bi->flags & BTRFS_BLOCK_GROUP_DATA) { + read_extent_buffer(leaf, &cache->item, + btrfs_item_ptr_offset(leaf, path->slots[0]), + sizeof(cache->item)); + if (cache->item.flags & BTRFS_BLOCK_GROUP_DATA) { radix = &info->block_group_data_radix; cache->data = 1; } else { @@ -1629,7 +1635,6 @@ int btrfs_read_block_groups(struct btrfs_root *root) cache->data = 0; } - memcpy(&cache->item, bi, sizeof(*bi)); memcpy(&cache->key, &found_key, sizeof(found_key)); cache->last_alloc = cache->key.objectid; cache->first_free = cache->key.objectid; @@ -1640,11 +1645,12 @@ int btrfs_read_block_groups(struct btrfs_root *root) key.objectid = found_key.objectid + found_key.offset; btrfs_release_path(root, path); + ret = radix_tree_insert(radix, found_key.objectid + found_key.offset - 1, (void *)cache); BUG_ON(ret); - used = btrfs_block_group_used(bi); + used = btrfs_block_group_used(&cache->item); if (used < div_factor(key.offset, 8)) { radix_tree_tag_set(radix, found_key.objectid + found_key.offset - 1, diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 0ab368e091f9..55fefdfab84c 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -26,16 +26,6 @@ struct tree_entry { struct rb_node rb_node; }; -/* bits for the extent state */ -#define EXTENT_DIRTY 1 -#define EXTENT_WRITEBACK (1 << 1) -#define EXTENT_UPTODATE (1 << 2) -#define EXTENT_LOCKED (1 << 3) -#define EXTENT_NEW (1 << 4) -#define EXTENT_DELALLOC (1 << 5) - -#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) - void __init extent_map_init(void) { extent_map_cache = btrfs_cache_create("extent_map", @@ -223,7 +213,8 @@ int add_extent_mapping(struct extent_map_tree *tree, if (rb) prev = rb_entry(rb, struct extent_map, rb_node); if (prev && prev->end + 1 == em->start && - ((em->block_start == 0 && prev->block_start == 0) || + ((em->block_start == EXTENT_MAP_HOLE && + prev->block_start == EXTENT_MAP_HOLE) || (em->block_start == prev->block_end + 1))) { em->start = prev->start; em->block_start = prev->block_start; @@ -926,6 +917,40 @@ int set_range_writeback(struct extent_map_tree *tree, u64 start, u64 end) } EXPORT_SYMBOL(set_range_writeback); +int find_first_extent_bit(struct extent_map_tree *tree, u64 start, + u64 *start_ret, u64 *end_ret, int bits) +{ + struct rb_node *node; + struct extent_state *state; + int ret = 1; + + write_lock_irq(&tree->lock); + /* + * this search will find all the extents that end after + * our range starts. + */ + node = tree_search(&tree->state, start); + if (!node || IS_ERR(node)) { + goto out; + } + + while(1) { + state = rb_entry(node, struct extent_state, rb_node); + if (state->state & bits) { + *start_ret = state->start; + *end_ret = state->end; + ret = 0; + } + node = rb_next(node); + if (!node) + break; + } +out: + write_unlock_irq(&tree->lock); + return ret; +} +EXPORT_SYMBOL(find_first_extent_bit); + u64 find_lock_delalloc_range(struct extent_map_tree *tree, u64 start, u64 lock_start, u64 *end, u64 max_bytes) { @@ -1450,7 +1475,7 @@ int extent_read_full_page(struct extent_map_tree *tree, struct page *page, em = NULL; /* we've found a hole, just zero and go on */ - if (block_start == 0) { + if (block_start == EXTENT_MAP_HOLE) { zero_user_page(page, page_offset, iosize, KM_USER0); set_extent_uptodate(tree, cur, cur + iosize - 1, GFP_NOFS); @@ -1593,7 +1618,8 @@ int extent_write_full_page(struct extent_map_tree *tree, struct page *page, free_extent_map(em); em = NULL; - if (block_start == 0 || block_start == EXTENT_MAP_INLINE) { + if (block_start == EXTENT_MAP_HOLE || + block_start == EXTENT_MAP_INLINE) { clear_extent_dirty(tree, cur, cur + iosize - 1, GFP_NOFS); cur = cur + iosize; @@ -1630,7 +1656,6 @@ int extent_write_full_page(struct extent_map_tree *tree, struct page *page, nr++; } done: - WARN_ON(test_range_bit(tree, start, page_end, EXTENT_DIRTY, 0)); unlock_extent(tree, start, page_end, GFP_NOFS); unlock_page(page); return 0; @@ -1827,8 +1852,623 @@ sector_t extent_bmap(struct address_space *mapping, sector_t iblock, // XXX(hch): block 0 is valid in some cases, e.g. XFS RT device if (em->block_start == EXTENT_MAP_INLINE || - em->block_start == 0) - return 0; + em->block_start == EXTENT_MAP_HOLE) + return 0; return (em->block_start + start - em->start) >> inode->i_blkbits; } + +struct extent_buffer *alloc_extent_buffer(struct extent_map_tree *tree, + u64 start, unsigned long len, + gfp_t mask) +{ + unsigned long num_pages = ((start + len - 1) >> PAGE_CACHE_SHIFT) - + (start >> PAGE_CACHE_SHIFT) + 1; + unsigned long i; + unsigned long index = start >> PAGE_CACHE_SHIFT; + struct extent_buffer *eb; + struct page *p; + struct address_space *mapping = tree->mapping; + int uptodate = 0; + + eb = kzalloc(EXTENT_BUFFER_SIZE(num_pages), mask); + if (!eb || IS_ERR(eb)) + return NULL; + + eb->start = start; + eb->len = len; + atomic_set(&eb->refs, 1); + + for (i = 0; i < num_pages; i++, index++) { + p = find_or_create_page(mapping, index, mask | __GFP_HIGHMEM); + if (!p) + goto fail; + eb->pages[i] = p; + if (!PageUptodate(p)) + uptodate = 0; + unlock_page(p); + } + if (uptodate) + eb->flags |= EXTENT_UPTODATE; + return eb; +fail: + free_extent_buffer(eb); + return NULL; +} +EXPORT_SYMBOL(alloc_extent_buffer); + +struct extent_buffer *find_extent_buffer(struct extent_map_tree *tree, + u64 start, unsigned long len, + gfp_t mask) +{ + unsigned long num_pages = ((start + len - 1) >> PAGE_CACHE_SHIFT) - + (start >> PAGE_CACHE_SHIFT) + 1; + unsigned long i; + unsigned long index = start >> PAGE_CACHE_SHIFT; + struct extent_buffer *eb; + struct page *p; + struct address_space *mapping = tree->mapping; + + eb = kzalloc(EXTENT_BUFFER_SIZE(num_pages), mask); + if (!eb || IS_ERR(eb)) + return NULL; + + eb->start = start; + eb->len = len; + atomic_set(&eb->refs, 1); + + for (i = 0; i < num_pages; i++, index++) { + p = find_get_page(mapping, index); + if (!p) + goto fail; + eb->pages[i] = p; + } + return eb; +fail: + free_extent_buffer(eb); + return NULL; +} +EXPORT_SYMBOL(find_extent_buffer); + +void free_extent_buffer(struct extent_buffer *eb) +{ + unsigned long i; + unsigned long num_pages; + + if (!eb) + return; + + if (!atomic_dec_and_test(&eb->refs)) + return; + + num_pages = ((eb->start + eb->len - 1) >> PAGE_CACHE_SHIFT) - + (eb->start >> PAGE_CACHE_SHIFT) + 1; + + for (i = 0; i < num_pages; i++) { + if (eb->pages[i]) + page_cache_release(eb->pages[i]); + } + kfree(eb); +} +EXPORT_SYMBOL(free_extent_buffer); + +int clear_extent_buffer_dirty(struct extent_map_tree *tree, + struct extent_buffer *eb) +{ + int set; + unsigned long i; + unsigned long num_pages; + struct page *page; + + u64 start = eb->start; + u64 end = start + eb->len - 1; + + set = clear_extent_dirty(tree, start, end, GFP_NOFS); + num_pages = ((eb->start + eb->len - 1) >> PAGE_CACHE_SHIFT) - + (eb->start >> PAGE_CACHE_SHIFT) + 1; + + for (i = 0; i < num_pages; i++) { + page = eb->pages[i]; + lock_page(page); + /* + * if we're on the last page or the first page and the + * block isn't aligned on a page boundary, do extra checks + * to make sure we don't clean page that is partially dirty + */ + if ((i == 0 && (eb->start & (PAGE_CACHE_SIZE - 1))) || + ((i == num_pages - 1) && + ((eb->start + eb->len - 1) & (PAGE_CACHE_SIZE - 1)))) { + start = page->index << PAGE_CACHE_SHIFT; + end = start + PAGE_CACHE_SIZE - 1; + if (test_range_bit(tree, start, end, + EXTENT_DIRTY, 0)) { + unlock_page(page); + continue; + } + } + clear_page_dirty_for_io(page); + unlock_page(page); + } + return 0; +} +EXPORT_SYMBOL(clear_extent_buffer_dirty); + +int wait_on_extent_buffer_writeback(struct extent_map_tree *tree, + struct extent_buffer *eb) +{ + return wait_on_extent_writeback(tree, eb->start, + eb->start + eb->len - 1); +} +EXPORT_SYMBOL(wait_on_extent_buffer_writeback); + +int set_extent_buffer_dirty(struct extent_map_tree *tree, + struct extent_buffer *eb) +{ + return set_range_dirty(tree, eb->start, eb->start + eb->len - 1); +} +EXPORT_SYMBOL(set_extent_buffer_dirty); + +int set_extent_buffer_uptodate(struct extent_map_tree *tree, + struct extent_buffer *eb) +{ + unsigned long i; + struct page *page; + unsigned long num_pages; + + num_pages = ((eb->start + eb->len - 1) >> PAGE_CACHE_SHIFT) - + (eb->start >> PAGE_CACHE_SHIFT) + 1; + + set_extent_uptodate(tree, eb->start, eb->start + eb->len - 1, + GFP_NOFS); + for (i = 0; i < num_pages; i++) { + page = eb->pages[i]; + if ((i == 0 && (eb->start & (PAGE_CACHE_SIZE - 1))) || + ((i == num_pages - 1) && + ((eb->start + eb->len - 1) & (PAGE_CACHE_SIZE - 1)))) { + check_page_uptodate(tree, page); + continue; + } + SetPageUptodate(page); + } + return 0; +} +EXPORT_SYMBOL(set_extent_buffer_uptodate); + +int extent_buffer_uptodate(struct extent_map_tree *tree, + struct extent_buffer *eb) +{ + if (eb->flags & EXTENT_UPTODATE) + return 1; + return test_range_bit(tree, eb->start, eb->start + eb->len - 1, + EXTENT_UPTODATE, 1); +} +EXPORT_SYMBOL(extent_buffer_uptodate); + +int read_extent_buffer_pages(struct extent_map_tree *tree, + struct extent_buffer *eb, int wait) +{ + unsigned long i; + struct page *page; + int err; + int ret = 0; + unsigned long num_pages; + + if (eb->flags & EXTENT_UPTODATE) + return 0; + + if (test_range_bit(tree, eb->start, eb->start + eb->len - 1, + EXTENT_UPTODATE, 1)) { + return 0; + } + + num_pages = ((eb->start + eb->len - 1) >> PAGE_CACHE_SHIFT) - + (eb->start >> PAGE_CACHE_SHIFT) + 1; + for (i = 0; i < num_pages; i++) { + page = eb->pages[i]; + if (PageUptodate(page)) { + continue; + } + if (!wait) { + if (TestSetPageLocked(page)) { + continue; + } + } else { + lock_page(page); + } + if (!PageUptodate(page)) { + err = page->mapping->a_ops->readpage(NULL, page); + if (err) { + ret = err; + } + } else { + unlock_page(page); + } + } + + if (ret || !wait) { + return ret; + } + + for (i = 0; i < num_pages; i++) { + page = eb->pages[i]; + wait_on_page_locked(page); + if (!PageUptodate(page)) { + ret = -EIO; + } + } + eb->flags |= EXTENT_UPTODATE; + return ret; +} +EXPORT_SYMBOL(read_extent_buffer_pages); + +void read_extent_buffer(struct extent_buffer *eb, void *dstv, + unsigned long start, + unsigned long len) +{ + size_t cur; + size_t offset; + struct page *page; + char *kaddr; + char *dst = (char *)dstv; + size_t start_offset = eb->start & ((u64)PAGE_CACHE_SIZE - 1); + unsigned long i = (start_offset + start) >> PAGE_CACHE_SHIFT; + + WARN_ON(start > eb->len); + WARN_ON(start + len > eb->start + eb->len); + + page = eb->pages[i]; + offset = start & ((unsigned long)PAGE_CACHE_SIZE - 1); + if (i == 0) + offset += start_offset; + + while(len > 0) { + WARN_ON(!PageUptodate(page)); + + cur = min(len, (PAGE_CACHE_SIZE - offset)); + // kaddr = kmap_atomic(page, KM_USER0); + kaddr = page_address(page); + memcpy(dst, kaddr + offset, cur); + // kunmap_atomic(kaddr, KM_USER0); + + dst += cur; + len -= cur; + offset = 0; + i++; + page = eb->pages[i]; + } +} +EXPORT_SYMBOL(read_extent_buffer); + +int map_extent_buffer(struct extent_buffer *eb, unsigned long start, + char **token, char **map, + unsigned long *map_start, + unsigned long *map_len, int km) +{ + size_t offset; + char *kaddr; + size_t start_offset = eb->start & ((u64)PAGE_CACHE_SIZE - 1); + unsigned long i = (start_offset + start) >> PAGE_CACHE_SHIFT; + + WARN_ON(start > eb->len); + + if (i == 0) { + offset = start_offset; + *map_start = 0; + } else { + offset = 0; + *map_start = (i << PAGE_CACHE_SHIFT) - offset; + } + + // kaddr = kmap_atomic(eb->pages[i], km); + kaddr = page_address(eb->pages[i]); + *token = kaddr; + *map = kaddr + offset; + *map_len = PAGE_CACHE_SIZE - offset; + return 0; +} +EXPORT_SYMBOL(map_extent_buffer); + +void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km) +{ + // kunmap_atomic(token, km); +} +EXPORT_SYMBOL(unmap_extent_buffer); + +int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, + unsigned long start, + unsigned long len) +{ + size_t cur; + size_t offset; + struct page *page; + char *kaddr; + char *ptr = (char *)ptrv; + size_t start_offset = eb->start & ((u64)PAGE_CACHE_SIZE - 1); + unsigned long i = (start_offset + start) >> PAGE_CACHE_SHIFT; + int ret = 0; + + WARN_ON(start > eb->len); + WARN_ON(start + len > eb->start + eb->len); + + page = eb->pages[i]; + offset = start & ((unsigned long)PAGE_CACHE_SIZE - 1); + if (i == 0) + offset += start_offset; + + while(len > 0) { + WARN_ON(!PageUptodate(page)); + + cur = min(len, (PAGE_CACHE_SIZE - offset)); + + // kaddr = kmap_atomic(page, KM_USER0); + kaddr = page_address(page); + ret = memcmp(ptr, kaddr + offset, cur); + // kunmap_atomic(kaddr, KM_USER0); + if (ret) + break; + + ptr += cur; + len -= cur; + offset = 0; + i++; + page = eb->pages[i]; + } + return ret; +} +EXPORT_SYMBOL(memcmp_extent_buffer); + +void write_extent_buffer(struct extent_buffer *eb, const void *srcv, + unsigned long start, unsigned long len) +{ + size_t cur; + size_t offset; + struct page *page; + char *kaddr; + char *src = (char *)srcv; + size_t start_offset = eb->start & ((u64)PAGE_CACHE_SIZE - 1); + unsigned long i = (start_offset + start) >> PAGE_CACHE_SHIFT; + + WARN_ON(start > eb->len); + WARN_ON(start + len > eb->start + eb->len); + + page = eb->pages[i]; + offset = start & ((unsigned long)PAGE_CACHE_SIZE - 1); + if (i == 0) + offset += start_offset; + + while(len > 0) { + WARN_ON(!PageUptodate(page)); + + cur = min(len, PAGE_CACHE_SIZE - offset); + // kaddr = kmap_atomic(page, KM_USER0); + kaddr = page_address(page); + memcpy(kaddr + offset, src, cur); + // kunmap_atomic(kaddr, KM_USER0); + + src += cur; + len -= cur; + offset = 0; + i++; + page = eb->pages[i]; + } +} +EXPORT_SYMBOL(write_extent_buffer); + +void memset_extent_buffer(struct extent_buffer *eb, char c, + unsigned long start, unsigned long len) +{ + size_t cur; + size_t offset; + struct page *page; + char *kaddr; + size_t start_offset = eb->start & ((u64)PAGE_CACHE_SIZE - 1); + unsigned long i = (start_offset + start) >> PAGE_CACHE_SHIFT; + + WARN_ON(start > eb->len); + WARN_ON(start + len > eb->start + eb->len); + + page = eb->pages[i]; + offset = start & ((unsigned long)PAGE_CACHE_SIZE - 1); + if (i == 0) + offset += start_offset; + + while(len > 0) { + WARN_ON(!PageUptodate(page)); + + cur = min(len, PAGE_CACHE_SIZE - offset); + // kaddr = kmap_atomic(page, KM_USER0); + kaddr = page_address(page); + memset(kaddr + offset, c, cur); + // kunmap_atomic(kaddr, KM_USER0); + + len -= cur; + offset = 0; + i++; + page = eb->pages[i]; + } +} +EXPORT_SYMBOL(memset_extent_buffer); + +void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, + unsigned long dst_offset, unsigned long src_offset, + unsigned long len) +{ + u64 dst_len = dst->len; + size_t cur; + size_t offset; + struct page *page; + char *kaddr; + size_t start_offset = dst->start & ((u64)PAGE_CACHE_SIZE - 1); + unsigned long i = (start_offset + dst_offset) >> PAGE_CACHE_SHIFT; + + WARN_ON(src->len != dst_len); + + offset = dst_offset & ((unsigned long)PAGE_CACHE_SIZE - 1); + if (i == 0) + offset += start_offset; + + while(len > 0) { + page = dst->pages[i]; + WARN_ON(!PageUptodate(page)); + + cur = min(len, (unsigned long)(PAGE_CACHE_SIZE - offset)); + + // kaddr = kmap_atomic(page, KM_USER1); + kaddr = page_address(page); + read_extent_buffer(src, kaddr + offset, src_offset, cur); + // kunmap_atomic(kaddr, KM_USER1); + + src_offset += cur; + len -= cur; + offset = 0; + i++; + } +} +EXPORT_SYMBOL(copy_extent_buffer); + +static void move_pages(struct page *dst_page, struct page *src_page, + unsigned long dst_off, unsigned long src_off, + unsigned long len) +{ + // char *dst_kaddr = kmap_atomic(dst_page, KM_USER0); + char *dst_kaddr = page_address(dst_page); + if (dst_page == src_page) { + memmove(dst_kaddr + dst_off, dst_kaddr + src_off, len); + } else { + // char *src_kaddr = kmap_atomic(src_page, KM_USER1); + char *src_kaddr = page_address(src_page); + char *p = dst_kaddr + dst_off + len; + char *s = src_kaddr + src_off + len; + + while (len--) + *--p = *--s; + + // kunmap_atomic(src_kaddr, KM_USER1); + } + // kunmap_atomic(dst_kaddr, KM_USER0); +} + +static void copy_pages(struct page *dst_page, struct page *src_page, + unsigned long dst_off, unsigned long src_off, + unsigned long len) +{ + //kmap_atomic(dst_page, KM_USER0); + char *dst_kaddr = page_address(dst_page); + char *src_kaddr; + + if (dst_page != src_page) + src_kaddr = page_address(src_page); // kmap_atomic(src_page, KM_USER1); + else + src_kaddr = dst_kaddr; + + memcpy(dst_kaddr + dst_off, src_kaddr + src_off, len); + /* + kunmap_atomic(dst_kaddr, KM_USER0); + if (dst_page != src_page) + kunmap_atomic(src_kaddr, KM_USER1); + */ +} + +void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, + unsigned long src_offset, unsigned long len) +{ + size_t cur; + size_t dst_off_in_page; + size_t src_off_in_page; + size_t start_offset = dst->start & ((u64)PAGE_CACHE_SIZE - 1); + unsigned long dst_i; + unsigned long src_i; + + if (src_offset + len > dst->len) { + printk("memmove bogus src_offset %lu move len %lu len %lu\n", + src_offset, len, dst->len); + BUG_ON(1); + } + if (dst_offset + len > dst->len) { + printk("memmove bogus dst_offset %lu move len %lu len %lu\n", + dst_offset, len, dst->len); + BUG_ON(1); + } + + while(len > 0) { + dst_off_in_page = dst_offset & + ((unsigned long)PAGE_CACHE_SIZE - 1); + src_off_in_page = src_offset & + ((unsigned long)PAGE_CACHE_SIZE - 1); + + dst_i = (start_offset + dst_offset) >> PAGE_CACHE_SHIFT; + src_i = (start_offset + src_offset) >> PAGE_CACHE_SHIFT; + + if (src_i == 0) + src_off_in_page += start_offset; + if (dst_i == 0) + dst_off_in_page += start_offset; + + cur = min(len, (unsigned long)(PAGE_CACHE_SIZE - + src_off_in_page)); + cur = min(cur, (unsigned long)(PAGE_CACHE_SIZE - + dst_off_in_page)); + + copy_pages(dst->pages[dst_i], dst->pages[src_i], + dst_off_in_page, src_off_in_page, cur); + + src_offset += cur; + dst_offset += cur; + len -= cur; + } +} +EXPORT_SYMBOL(memcpy_extent_buffer); + +void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, + unsigned long src_offset, unsigned long len) +{ + size_t cur; + size_t dst_off_in_page; + size_t src_off_in_page; + unsigned long dst_end = dst_offset + len - 1; + unsigned long src_end = src_offset + len - 1; + size_t start_offset = dst->start & ((u64)PAGE_CACHE_SIZE - 1); + unsigned long dst_i; + unsigned long src_i; + + if (src_offset + len > dst->len) { + printk("memmove bogus src_offset %lu move len %lu len %lu\n", + src_offset, len, dst->len); + BUG_ON(1); + } + if (dst_offset + len > dst->len) { + printk("memmove bogus dst_offset %lu move len %lu len %lu\n", + dst_offset, len, dst->len); + BUG_ON(1); + } + if (dst_offset < src_offset) { + memcpy_extent_buffer(dst, dst_offset, src_offset, len); + return; + } + while(len > 0) { + dst_i = (start_offset + dst_end) >> PAGE_CACHE_SHIFT; + src_i = (start_offset + src_end) >> PAGE_CACHE_SHIFT; + + dst_off_in_page = dst_end & + ((unsigned long)PAGE_CACHE_SIZE - 1); + src_off_in_page = src_end & + ((unsigned long)PAGE_CACHE_SIZE - 1); + + if (src_i == 0) + src_off_in_page += start_offset; + if (dst_i == 0) + dst_off_in_page += start_offset; + + cur = min(len, src_off_in_page + 1); + cur = min(cur, dst_off_in_page + 1); +// printk("move pages orig dst %lu src %lu len %lu, this %lu %lu %lu\n", dst_offset, src_offset, len, dst_off_in_page - cur + 1, src_off_in_page - cur + 1, cur); + move_pages(dst->pages[dst_i], dst->pages[src_i], + dst_off_in_page - cur + 1, + src_off_in_page - cur + 1, cur); + + dst_end -= cur - 1; + src_end -= cur - 1; + len -= cur; + } +} +EXPORT_SYMBOL(memmove_extent_buffer); diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index d913ce01248d..430b997a70f6 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -3,9 +3,20 @@ #include +#define EXTENT_MAP_HOLE (u64)-3 #define EXTENT_MAP_INLINE (u64)-2 #define EXTENT_MAP_DELALLOC (u64)-1 +/* bits for the extent state */ +#define EXTENT_DIRTY 1 +#define EXTENT_WRITEBACK (1 << 1) +#define EXTENT_UPTODATE (1 << 2) +#define EXTENT_LOCKED (1 << 3) +#define EXTENT_NEW (1 << 4) +#define EXTENT_DELALLOC (1 << 5) +#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) + + struct extent_map_ops { int (*fill_delalloc)(struct inode *inode, u64 start, u64 end); int (*writepage_io_hook)(struct page *page, u64 start, u64 end); @@ -51,10 +62,13 @@ struct extent_state { struct list_head list; }; +#define EXTENT_BUFFER_SIZE(nr) (sizeof(struct extent_buffer) + \ + (nr - 1) * sizeof(struct page *)) struct extent_buffer { u64 start; - u64 end; /* inclusive */ - char *addr; + unsigned long len; + atomic_t refs; + int flags; struct page *pages[]; }; @@ -87,8 +101,12 @@ int set_extent_new(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask); int set_extent_dirty(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask); +int clear_extent_dirty(struct extent_map_tree *tree, u64 start, u64 end, + gfp_t mask); int set_extent_delalloc(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask); +int find_first_extent_bit(struct extent_map_tree *tree, u64 start, + u64 *start_ret, u64 *end_ret, int bits); int extent_invalidatepage(struct extent_map_tree *tree, struct page *page, unsigned long offset); int extent_write_full_page(struct extent_map_tree *tree, struct page *page, @@ -106,4 +124,57 @@ int set_range_dirty(struct extent_map_tree *tree, u64 start, u64 end); int set_state_private(struct extent_map_tree *tree, u64 start, u64 private); int get_state_private(struct extent_map_tree *tree, u64 start, u64 *private); void set_page_extent_mapped(struct page *page); + +struct extent_buffer *alloc_extent_buffer(struct extent_map_tree *tree, + u64 start, unsigned long len, + gfp_t mask); +struct extent_buffer *find_extent_buffer(struct extent_map_tree *tree, + u64 start, unsigned long len, + gfp_t mask); +void free_extent_buffer(struct extent_buffer *eb); +int read_extent_buffer_pages(struct extent_map_tree *tree, + struct extent_buffer *eb, int wait); + +static inline void extent_buffer_get(struct extent_buffer *eb) +{ + atomic_inc(&eb->refs); +} + +static inline u64 extent_buffer_blocknr(struct extent_buffer *eb) +{ + return eb->start / 4096; +} + +int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, + unsigned long start, + unsigned long len); +void read_extent_buffer(struct extent_buffer *eb, void *dst, + unsigned long start, + unsigned long len); +void write_extent_buffer(struct extent_buffer *eb, const void *src, + unsigned long start, unsigned long len); +void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, + unsigned long dst_offset, unsigned long src_offset, + unsigned long len); +void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, + unsigned long src_offset, unsigned long len); +void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, + unsigned long src_offset, unsigned long len); +void memset_extent_buffer(struct extent_buffer *eb, char c, + unsigned long start, unsigned long len); +int wait_on_extent_buffer_writeback(struct extent_map_tree *tree, + struct extent_buffer *eb); +int clear_extent_buffer_dirty(struct extent_map_tree *tree, + struct extent_buffer *eb); +int set_extent_buffer_dirty(struct extent_map_tree *tree, + struct extent_buffer *eb); +int set_extent_buffer_uptodate(struct extent_map_tree *tree, + struct extent_buffer *eb); +int extent_buffer_uptodate(struct extent_map_tree *tree, + struct extent_buffer *eb); +int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, + char **token, char **map, + unsigned long *map_start, + unsigned long *map_len, int km); +void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); #endif diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index ea4dd4c5fce3..226f6d028c3f 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -34,12 +34,12 @@ int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, struct btrfs_file_extent_item *item; struct btrfs_key file_key; struct btrfs_path *path; + struct extent_buffer *leaf; path = btrfs_alloc_path(); BUG_ON(!path); file_key.objectid = objectid; file_key.offset = pos; - file_key.flags = 0; btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY); ret = btrfs_insert_empty_item(trans, root, path, &file_key, @@ -47,15 +47,16 @@ int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, if (ret < 0) goto out; BUG_ON(ret); - item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0], + leaf = path->nodes[0]; + item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); - btrfs_set_file_extent_disk_blocknr(item, offset); - btrfs_set_file_extent_disk_num_blocks(item, disk_num_blocks); - btrfs_set_file_extent_offset(item, 0); - btrfs_set_file_extent_num_blocks(item, num_blocks); - btrfs_set_file_extent_generation(item, trans->transid); - btrfs_set_file_extent_type(item, BTRFS_FILE_EXTENT_REG); - btrfs_mark_buffer_dirty(path->nodes[0]); + btrfs_set_file_extent_disk_blocknr(leaf, item, offset); + btrfs_set_file_extent_disk_num_blocks(leaf, item, disk_num_blocks); + btrfs_set_file_extent_offset(leaf, item, 0); + btrfs_set_file_extent_num_blocks(leaf, item, num_blocks); + btrfs_set_file_extent_generation(leaf, item, trans->transid); + btrfs_set_file_extent_type(leaf, item, BTRFS_FILE_EXTENT_REG); + btrfs_mark_buffer_dirty(leaf); out: btrfs_free_path(path); return ret; @@ -71,32 +72,30 @@ struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, struct btrfs_key file_key; struct btrfs_key found_key; struct btrfs_csum_item *item; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; u64 csum_offset = 0; int csums_in_item; file_key.objectid = objectid; file_key.offset = offset; - file_key.flags = 0; btrfs_set_key_type(&file_key, BTRFS_CSUM_ITEM_KEY); ret = btrfs_search_slot(trans, root, &file_key, path, 0, cow); if (ret < 0) goto fail; - leaf = btrfs_buffer_leaf(path->nodes[0]); + leaf = path->nodes[0]; if (ret > 0) { ret = 1; if (path->slots[0] == 0) goto fail; path->slots[0]--; - btrfs_disk_key_to_cpu(&found_key, - &leaf->items[path->slots[0]].key); + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); if (btrfs_key_type(&found_key) != BTRFS_CSUM_ITEM_KEY || found_key.objectid != objectid) { goto fail; } csum_offset = (offset - found_key.offset) >> root->fs_info->sb->s_blocksize_bits; - csums_in_item = btrfs_item_size(leaf->items + path->slots[0]); + csums_in_item = btrfs_item_size_nr(leaf, path->slots[0]); csums_in_item /= BTRFS_CRC32_SIZE; if (csum_offset >= csums_in_item) { @@ -127,7 +126,6 @@ int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, file_key.objectid = objectid; file_key.offset = offset; - file_key.flags = 0; btrfs_set_key_type(&file_key, BTRFS_EXTENT_DATA_KEY); ret = btrfs_search_slot(trans, root, &file_key, path, ins_len, cow); return ret; @@ -138,12 +136,14 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans, u64 objectid, u64 offset, char *data, size_t len) { + return 0; +#if 0 int ret; struct btrfs_key file_key; struct btrfs_key found_key; struct btrfs_path *path; struct btrfs_csum_item *item; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; u64 csum_offset; path = btrfs_alloc_path(); @@ -161,8 +161,8 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans, if (ret == -EFBIG) { u32 item_size; /* we found one, but it isn't big enough yet */ - leaf = btrfs_buffer_leaf(path->nodes[0]); - item_size = btrfs_item_size(leaf->items + path->slots[0]); + leaf = path->nodes[0]; + item_size = btrfs_item_size_nr(leaf, path->slots[0]); if ((item_size / BTRFS_CRC32_SIZE) >= MAX_CSUM_ITEMS(root)) { /* already at max size, make a new one */ goto insert; @@ -188,8 +188,8 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans, goto insert; } path->slots[0]--; - leaf = btrfs_buffer_leaf(path->nodes[0]); - btrfs_disk_key_to_cpu(&found_key, &leaf->items[path->slots[0]].key); + leaf = path->nodes[0]; + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); csum_offset = (offset - found_key.offset) >> root->fs_info->sb->s_blocksize_bits; if (btrfs_key_type(&found_key) != BTRFS_CSUM_ITEM_KEY || @@ -197,10 +197,10 @@ int btrfs_csum_file_block(struct btrfs_trans_handle *trans, csum_offset >= MAX_CSUM_ITEMS(root)) { goto insert; } - if (csum_offset >= btrfs_item_size(leaf->items + path->slots[0]) / + if (csum_offset >= btrfs_item_size_nr(leaf, path->slots[0]) / BTRFS_CRC32_SIZE) { u32 diff = (csum_offset + 1) * BTRFS_CRC32_SIZE; - diff = diff - btrfs_item_size(leaf->items + path->slots[0]); + diff = diff - btrfs_item_size_nr(leaf, path->slots[0]); if (diff != BTRFS_CRC32_SIZE) goto insert; ret = btrfs_extend_item(trans, root, path, diff); @@ -220,21 +220,20 @@ insert: goto fail; } csum: - item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0], - struct btrfs_csum_item); + leaf = path->nodes[0]; + item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_csum_item); ret = 0; item = (struct btrfs_csum_item *)((unsigned char *)item + csum_offset * BTRFS_CRC32_SIZE); found: - btrfs_check_bounds(&item->csum, BTRFS_CRC32_SIZE, - path->nodes[0]->b_data, - root->fs_info->sb->s_blocksize); + /* FIXME!!!!!!!!!!!! */ ret = btrfs_csum_data(root, data, len, &item->csum); btrfs_mark_buffer_dirty(path->nodes[0]); fail: btrfs_release_path(root, path); btrfs_free_path(path); return ret; +#endif } int btrfs_csum_truncate(struct btrfs_trans_handle *trans, @@ -242,21 +241,21 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans, u64 isize) { struct btrfs_key key; - struct btrfs_leaf *leaf = btrfs_buffer_leaf(path->nodes[0]); + struct extent_buffer *leaf = path->nodes[0]; int slot = path->slots[0]; int ret; u32 new_item_size; u64 new_item_span; u64 blocks; - btrfs_disk_key_to_cpu(&key, &leaf->items[slot].key); + btrfs_item_key_to_cpu(leaf, &key, slot); if (isize <= key.offset) return 0; new_item_span = isize - key.offset; - blocks = (new_item_span + root->blocksize - 1) >> + blocks = (new_item_span + root->sectorsize - 1) >> root->fs_info->sb->s_blocksize_bits; new_item_size = blocks * BTRFS_CRC32_SIZE; - if (new_item_size >= btrfs_item_size(leaf->items + slot)) + if (new_item_size >= btrfs_item_size_nr(leaf, slot)) return 0; ret = btrfs_truncate_item(trans, root, path, new_item_size); BUG_ON(ret); diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 4cc459c943ec..1734ca695555 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -16,7 +16,6 @@ * Boston, MA 021110-1307, USA. */ -#include #include #include #include @@ -88,7 +87,9 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, { struct btrfs_key key; struct btrfs_path *path; - char *ptr, *kaddr; + struct extent_buffer *leaf; + char *kaddr; + unsigned long ptr; struct btrfs_file_extent_item *ei; u32 datasize; int err = 0; @@ -102,7 +103,6 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, key.objectid = inode->i_ino; key.offset = offset; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY); BUG_ON(size >= PAGE_CACHE_SIZE); datasize = btrfs_file_extent_calc_inline_size(size); @@ -113,18 +113,17 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, err = ret; goto fail; } - ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), - path->slots[0], struct btrfs_file_extent_item); - btrfs_set_file_extent_generation(ei, trans->transid); - btrfs_set_file_extent_type(ei, - BTRFS_FILE_EXTENT_INLINE); + leaf = path->nodes[0]; + ei = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_file_extent_item); + btrfs_set_file_extent_generation(leaf, ei, trans->transid); + btrfs_set_file_extent_type(leaf, ei, BTRFS_FILE_EXTENT_INLINE); ptr = btrfs_file_extent_inline_start(ei); kaddr = kmap_atomic(page, KM_USER0); - btrfs_memcpy(root, path->nodes[0]->b_data, - ptr, kaddr + page_offset, size); + write_extent_buffer(leaf, kaddr + page_offset, ptr, size); kunmap_atomic(kaddr, KM_USER0); - btrfs_mark_buffer_dirty(path->nodes[0]); + btrfs_mark_buffer_dirty(leaf); fail: btrfs_free_path(path); return err; @@ -156,8 +155,8 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans, em->bdev = inode->i_sb->s_bdev; - start_pos = pos & ~((u64)root->blocksize - 1); - num_blocks = (write_bytes + pos - start_pos + root->blocksize - 1) >> + start_pos = pos & ~((u64)root->sectorsize - 1); + num_blocks = (write_bytes + pos - start_pos + root->sectorsize - 1) >> inode->i_blkbits; down_read(&BTRFS_I(inode)->root->snap_sem); @@ -184,7 +183,7 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans, if (inode->i_size < start_pos) { u64 last_pos_in_file; u64 hole_size; - u64 mask = root->blocksize - 1; + u64 mask = root->sectorsize - 1; last_pos_in_file = (isize + mask) & ~mask; hole_size = (start_pos - last_pos_in_file + mask) & ~mask; @@ -227,8 +226,8 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans, /* step one, delete the existing extents in this range */ /* FIXME blocksize != pagesize */ err = btrfs_drop_extents(trans, root, inode, start_pos, - (pos + write_bytes + root->blocksize -1) & - ~((u64)root->blocksize - 1), &hint_block); + (pos + write_bytes + root->sectorsize -1) & + ~((u64)root->sectorsize - 1), &hint_block); if (err) goto failed; @@ -288,7 +287,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans, { int ret; struct btrfs_key key; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; int slot; struct btrfs_file_extent_item *extent; u64 extent_end = 0; @@ -327,10 +326,10 @@ next_slot: found_extent = 0; found_inline = 0; extent = NULL; - leaf = btrfs_buffer_leaf(path->nodes[0]); + leaf = path->nodes[0]; slot = path->slots[0]; ret = 0; - btrfs_disk_key_to_cpu(&key, &leaf->items[slot].key); + btrfs_item_key_to_cpu(leaf, &key, slot); if (key.offset >= end || key.objectid != inode->i_ino) { goto out; } @@ -344,17 +343,18 @@ next_slot: if (btrfs_key_type(&key) == BTRFS_EXTENT_DATA_KEY) { extent = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item); - found_type = btrfs_file_extent_type(extent); + found_type = btrfs_file_extent_type(leaf, extent); if (found_type == BTRFS_FILE_EXTENT_REG) { extent_end = key.offset + - (btrfs_file_extent_num_blocks(extent) << + (btrfs_file_extent_num_blocks(leaf, extent) << inode->i_blkbits); found_extent = 1; } else if (found_type == BTRFS_FILE_EXTENT_INLINE) { + struct btrfs_item *item; + item = btrfs_item_nr(leaf, slot); found_inline = 1; extent_end = key.offset + - btrfs_file_extent_inline_len(leaf->items + - slot); + btrfs_file_extent_inline_len(leaf, item); } } else { extent_end = search_start; @@ -365,8 +365,7 @@ next_slot: search_start >= extent_end) { int nextret; u32 nritems; - nritems = btrfs_header_nritems( - btrfs_buffer_header(path->nodes[0])); + nritems = btrfs_header_nritems(leaf); if (slot >= nritems - 1) { nextret = btrfs_next_leaf(root, path); if (nextret) @@ -380,7 +379,7 @@ next_slot: /* FIXME, there's only one inline extent allowed right now */ if (found_inline) { - u64 mask = root->blocksize - 1; + u64 mask = root->sectorsize - 1; search_start = (extent_end + mask) & ~mask; } else search_start = extent_end; @@ -388,10 +387,13 @@ next_slot: if (end < extent_end && end >= key.offset) { if (found_extent) { u64 disk_blocknr = - btrfs_file_extent_disk_blocknr(extent); + btrfs_file_extent_disk_blocknr(leaf,extent); u64 disk_num_blocks = - btrfs_file_extent_disk_num_blocks(extent); - memcpy(&old, extent, sizeof(old)); + btrfs_file_extent_disk_num_blocks(leaf, + extent); + read_extent_buffer(leaf, &old, + (unsigned long)extent, + sizeof(old)); if (disk_blocknr != 0) { ret = btrfs_inc_extent_ref(trans, root, disk_blocknr, disk_num_blocks); @@ -406,20 +408,24 @@ next_slot: u64 new_num; u64 old_num; keep = 1; - WARN_ON(start & (root->blocksize - 1)); + WARN_ON(start & (root->sectorsize - 1)); if (found_extent) { new_num = (start - key.offset) >> inode->i_blkbits; - old_num = btrfs_file_extent_num_blocks(extent); + old_num = btrfs_file_extent_num_blocks(leaf, + extent); *hint_block = - btrfs_file_extent_disk_blocknr(extent); - if (btrfs_file_extent_disk_blocknr(extent)) { + btrfs_file_extent_disk_blocknr(leaf, + extent); + if (btrfs_file_extent_disk_blocknr(leaf, + extent)) { inode->i_blocks -= (old_num - new_num) << 3; } - btrfs_set_file_extent_num_blocks(extent, + btrfs_set_file_extent_num_blocks(leaf, + extent, new_num); - btrfs_mark_buffer_dirty(path->nodes[0]); + btrfs_mark_buffer_dirty(leaf); } else { WARN_ON(1); } @@ -431,13 +437,17 @@ next_slot: u64 extent_num_blocks = 0; if (found_extent) { disk_blocknr = - btrfs_file_extent_disk_blocknr(extent); + btrfs_file_extent_disk_blocknr(leaf, + extent); disk_num_blocks = - btrfs_file_extent_disk_num_blocks(extent); + btrfs_file_extent_disk_num_blocks(leaf, + extent); extent_num_blocks = - btrfs_file_extent_num_blocks(extent); + btrfs_file_extent_num_blocks(leaf, + extent); *hint_block = - btrfs_file_extent_disk_blocknr(extent); + btrfs_file_extent_disk_blocknr(leaf, + extent); } ret = btrfs_del_item(trans, root, path); /* TODO update progress marker and return */ @@ -464,42 +474,37 @@ next_slot: struct btrfs_key ins; ins.objectid = inode->i_ino; ins.offset = end; - ins.flags = 0; btrfs_set_key_type(&ins, BTRFS_EXTENT_DATA_KEY); btrfs_release_path(root, path); ret = btrfs_insert_empty_item(trans, root, path, &ins, sizeof(*extent)); + leaf = path->nodes[0]; if (ret) { - btrfs_print_leaf(root, btrfs_buffer_leaf(path->nodes[0])); - printk("got %d on inserting %Lu %u %Lu start %Lu end %Lu found %Lu %Lu keep was %d\n", ret , ins.objectid, ins.flags, ins.offset, start, end, key.offset, extent_end, keep); + btrfs_print_leaf(root, leaf); + printk("got %d on inserting %Lu %u %Lu start %Lu end %Lu found %Lu %Lu keep was %d\n", ret , ins.objectid, ins.type, ins.offset, start, end, key.offset, extent_end, keep); } BUG_ON(ret); - extent = btrfs_item_ptr( - btrfs_buffer_leaf(path->nodes[0]), - path->slots[0], - struct btrfs_file_extent_item); - btrfs_set_file_extent_disk_blocknr(extent, - btrfs_file_extent_disk_blocknr(&old)); - btrfs_set_file_extent_disk_num_blocks(extent, - btrfs_file_extent_disk_num_blocks(&old)); - - btrfs_set_file_extent_offset(extent, - btrfs_file_extent_offset(&old) + + extent = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_file_extent_item); + write_extent_buffer(leaf, &old, + (unsigned long)extent, sizeof(old)); + + btrfs_set_file_extent_offset(leaf, extent, + le64_to_cpu(old.offset) + ((end - key.offset) >> inode->i_blkbits)); - WARN_ON(btrfs_file_extent_num_blocks(&old) < + WARN_ON(le64_to_cpu(old.num_blocks) < (extent_end - end) >> inode->i_blkbits); - btrfs_set_file_extent_num_blocks(extent, + btrfs_set_file_extent_num_blocks(leaf, extent, (extent_end - end) >> inode->i_blkbits); - btrfs_set_file_extent_type(extent, + btrfs_set_file_extent_type(leaf, extent, BTRFS_FILE_EXTENT_REG); - btrfs_set_file_extent_generation(extent, - btrfs_file_extent_generation(&old)); btrfs_mark_buffer_dirty(path->nodes[0]); - if (btrfs_file_extent_disk_blocknr(&old) != 0) { + if (le64_to_cpu(old.disk_blocknr) != 0) { inode->i_blocks += - btrfs_file_extent_num_blocks(extent) << 3; + btrfs_file_extent_num_blocks(leaf, + extent) << 3; } ret = 0; goto out; @@ -529,8 +534,8 @@ static int prepare_pages(struct btrfs_root *root, u64 num_blocks; u64 start_pos; - start_pos = pos & ~((u64)root->blocksize - 1); - num_blocks = (write_bytes + pos - start_pos + root->blocksize - 1) >> + start_pos = pos & ~((u64)root->sectorsize - 1); + num_blocks = (write_bytes + pos - start_pos + root->sectorsize - 1) >> inode->i_blkbits; memset(pages, 0, num_pages * sizeof(struct page *)); diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c index b78346177539..35d2608f8918 100644 --- a/fs/btrfs/inode-item.c +++ b/fs/btrfs/inode-item.c @@ -20,24 +20,18 @@ #include "disk-io.h" #include "transaction.h" -int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root - *root, u64 objectid, struct btrfs_inode_item - *inode_item) +int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, u64 objectid) { - struct btrfs_path *path; struct btrfs_key key; int ret; key.objectid = objectid; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY); key.offset = 0; - path = btrfs_alloc_path(); - BUG_ON(!path); - ret = btrfs_insert_item(trans, root, &key, inode_item, - sizeof(*inode_item)); - btrfs_release_path(root, path); - btrfs_free_path(path); + ret = btrfs_insert_empty_item(trans, root, path, &key, + sizeof(struct btrfs_inode_item)); if (ret == 0 && objectid > root->highest_inode) root->highest_inode = objectid; return ret; @@ -51,15 +45,15 @@ int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root int cow = mod != 0; int ret; int slot; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; struct btrfs_key found_key; ret = btrfs_search_slot(trans, root, location, path, ins_len, cow); if (ret > 0 && btrfs_key_type(location) == BTRFS_ROOT_ITEM_KEY && location->offset == (u64)-1 && path->slots[0] != 0) { slot = path->slots[0] - 1; - leaf = btrfs_buffer_leaf(path->nodes[0]); - btrfs_disk_key_to_cpu(&found_key, &leaf->items[slot].key); + leaf = path->nodes[0]; + btrfs_item_key_to_cpu(leaf, &found_key, slot); if (found_key.objectid == location->objectid && btrfs_key_type(&found_key) == btrfs_key_type(location)) { path->slots[0]--; diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c index 405470866254..ab74977adf5c 100644 --- a/fs/btrfs/inode-map.c +++ b/fs/btrfs/inode-map.c @@ -24,8 +24,9 @@ int btrfs_find_highest_inode(struct btrfs_root *root, u64 *objectid) { struct btrfs_path *path; int ret; - struct btrfs_leaf *l; + struct extent_buffer *l; struct btrfs_key search_key; + struct btrfs_key found_key; int slot; path = btrfs_alloc_path(); @@ -39,8 +40,9 @@ int btrfs_find_highest_inode(struct btrfs_root *root, u64 *objectid) BUG_ON(ret == 0); if (path->slots[0] > 0) { slot = path->slots[0] - 1; - l = btrfs_buffer_leaf(path->nodes[0]); - *objectid = btrfs_disk_key_objectid(&l->items[slot].key); + l = path->nodes[0]; + btrfs_item_key_to_cpu(l, &found_key, slot); + *objectid = found_key.objectid; } else { *objectid = BTRFS_FIRST_FREE_OBJECTID; } @@ -64,13 +66,12 @@ int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, int slot = 0; u64 last_ino = 0; int start_found; - struct btrfs_leaf *l; + struct extent_buffer *l; struct btrfs_key search_key; u64 search_start = dirid; path = btrfs_alloc_path(); BUG_ON(!path); - search_key.flags = 0; search_start = root->last_inode_alloc; search_start = max(search_start, BTRFS_FIRST_FREE_OBJECTID); search_key.objectid = search_start; @@ -86,9 +87,9 @@ int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, path->slots[0]--; while (1) { - l = btrfs_buffer_leaf(path->nodes[0]); + l = path->nodes[0]; slot = path->slots[0]; - if (slot >= btrfs_header_nritems(&l->header)) { + if (slot >= btrfs_header_nritems(l)) { ret = btrfs_next_leaf(root, path); if (ret == 0) continue; @@ -103,7 +104,7 @@ int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, last_ino : search_start; goto found; } - btrfs_disk_key_to_cpu(&key, &l->items[slot].key); + btrfs_item_key_to_cpu(l, &key, slot); if (key.objectid >= search_start) { if (start_found) { if (last_ino < search_start) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index b03d40a907ca..fbe2836364e0 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -159,10 +159,8 @@ out: int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end) { - char csum[BTRFS_CRC32_SIZE]; size_t offset = start - (page->index << PAGE_CACHE_SHIFT); struct inode *inode = page->mapping->host; - struct btrfs_root *root = BTRFS_I(inode)->root; struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; char *kaddr; u64 private; @@ -173,11 +171,15 @@ int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end) if (ret) { goto zeroit; } + /* + struct btrfs_root *root = BTRFS_I(inode)->root; + char csum[BTRFS_CRC32_SIZE]; ret = btrfs_csum_data(root, kaddr + offset, end - start + 1, csum); BUG_ON(ret); if (memcmp(csum, &private, BTRFS_CRC32_SIZE)) { goto zeroit; } + */ kunmap_atomic(kaddr, KM_IRQ0); return 0; @@ -192,7 +194,9 @@ zeroit: void btrfs_read_locked_inode(struct inode *inode) { struct btrfs_path *path; + struct extent_buffer *leaf; struct btrfs_inode_item *inode_item; + struct btrfs_inode_timespec *tspec; struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_key location; u64 alloc_group_block; @@ -205,29 +209,37 @@ void btrfs_read_locked_inode(struct inode *inode) memcpy(&location, &BTRFS_I(inode)->location, sizeof(location)); ret = btrfs_lookup_inode(NULL, root, path, &location, 0); - if (ret) { + if (ret) goto make_bad; - } - inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), - path->slots[0], - struct btrfs_inode_item); - inode->i_mode = btrfs_inode_mode(inode_item); - inode->i_nlink = btrfs_inode_nlink(inode_item); - inode->i_uid = btrfs_inode_uid(inode_item); - inode->i_gid = btrfs_inode_gid(inode_item); - inode->i_size = btrfs_inode_size(inode_item); - inode->i_atime.tv_sec = btrfs_timespec_sec(&inode_item->atime); - inode->i_atime.tv_nsec = btrfs_timespec_nsec(&inode_item->atime); - inode->i_mtime.tv_sec = btrfs_timespec_sec(&inode_item->mtime); - inode->i_mtime.tv_nsec = btrfs_timespec_nsec(&inode_item->mtime); - inode->i_ctime.tv_sec = btrfs_timespec_sec(&inode_item->ctime); - inode->i_ctime.tv_nsec = btrfs_timespec_nsec(&inode_item->ctime); - inode->i_blocks = btrfs_inode_nblocks(inode_item); - inode->i_generation = btrfs_inode_generation(inode_item); + leaf = path->nodes[0]; + inode_item = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_inode_item); + + inode->i_mode = btrfs_inode_mode(leaf, inode_item); + inode->i_nlink = btrfs_inode_nlink(leaf, inode_item); + inode->i_uid = btrfs_inode_uid(leaf, inode_item); + inode->i_gid = btrfs_inode_gid(leaf, inode_item); + inode->i_size = btrfs_inode_size(leaf, inode_item); + + tspec = btrfs_inode_atime(inode_item); + inode->i_atime.tv_sec = btrfs_timespec_sec(leaf, tspec); + inode->i_atime.tv_nsec = btrfs_timespec_nsec(leaf, tspec); + + tspec = btrfs_inode_mtime(inode_item); + inode->i_mtime.tv_sec = btrfs_timespec_sec(leaf, tspec); + inode->i_mtime.tv_nsec = btrfs_timespec_nsec(leaf, tspec); + + tspec = btrfs_inode_ctime(inode_item); + inode->i_ctime.tv_sec = btrfs_timespec_sec(leaf, tspec); + inode->i_ctime.tv_nsec = btrfs_timespec_nsec(leaf, tspec); + + inode->i_blocks = btrfs_inode_nblocks(leaf, inode_item); + inode->i_generation = btrfs_inode_generation(leaf, inode_item); inode->i_rdev = 0; - rdev = btrfs_inode_rdev(inode_item); - alloc_group_block = btrfs_inode_block_group(inode_item); + rdev = btrfs_inode_rdev(leaf, inode_item); + + alloc_group_block = btrfs_inode_block_group(leaf, inode_item); BTRFS_I(inode)->block_group = btrfs_lookup_block_group(root->fs_info, alloc_group_block); @@ -267,24 +279,35 @@ make_bad: make_bad_inode(inode); } -static void fill_inode_item(struct btrfs_inode_item *item, +static void fill_inode_item(struct extent_buffer *leaf, + struct btrfs_inode_item *item, struct inode *inode) { - btrfs_set_inode_uid(item, inode->i_uid); - btrfs_set_inode_gid(item, inode->i_gid); - btrfs_set_inode_size(item, inode->i_size); - btrfs_set_inode_mode(item, inode->i_mode); - btrfs_set_inode_nlink(item, inode->i_nlink); - btrfs_set_timespec_sec(&item->atime, inode->i_atime.tv_sec); - btrfs_set_timespec_nsec(&item->atime, inode->i_atime.tv_nsec); - btrfs_set_timespec_sec(&item->mtime, inode->i_mtime.tv_sec); - btrfs_set_timespec_nsec(&item->mtime, inode->i_mtime.tv_nsec); - btrfs_set_timespec_sec(&item->ctime, inode->i_ctime.tv_sec); - btrfs_set_timespec_nsec(&item->ctime, inode->i_ctime.tv_nsec); - btrfs_set_inode_nblocks(item, inode->i_blocks); - btrfs_set_inode_generation(item, inode->i_generation); - btrfs_set_inode_rdev(item, inode->i_rdev); - btrfs_set_inode_block_group(item, + btrfs_set_inode_uid(leaf, item, inode->i_uid); + btrfs_set_inode_gid(leaf, item, inode->i_gid); + btrfs_set_inode_size(leaf, item, inode->i_size); + btrfs_set_inode_mode(leaf, item, inode->i_mode); + btrfs_set_inode_nlink(leaf, item, inode->i_nlink); + + btrfs_set_timespec_sec(leaf, btrfs_inode_atime(item), + inode->i_atime.tv_sec); + btrfs_set_timespec_nsec(leaf, btrfs_inode_atime(item), + inode->i_atime.tv_nsec); + + btrfs_set_timespec_sec(leaf, btrfs_inode_mtime(item), + inode->i_mtime.tv_sec); + btrfs_set_timespec_nsec(leaf, btrfs_inode_mtime(item), + inode->i_mtime.tv_nsec); + + btrfs_set_timespec_sec(leaf, btrfs_inode_ctime(item), + inode->i_ctime.tv_sec); + btrfs_set_timespec_nsec(leaf, btrfs_inode_ctime(item), + inode->i_ctime.tv_nsec); + + btrfs_set_inode_nblocks(leaf, item, inode->i_blocks); + btrfs_set_inode_generation(leaf, item, inode->i_generation); + btrfs_set_inode_rdev(leaf, item, inode->i_rdev); + btrfs_set_inode_block_group(leaf, item, BTRFS_I(inode)->block_group->key.objectid); } @@ -294,6 +317,7 @@ int btrfs_update_inode(struct btrfs_trans_handle *trans, { struct btrfs_inode_item *inode_item; struct btrfs_path *path; + struct extent_buffer *leaf; int ret; path = btrfs_alloc_path(); @@ -306,12 +330,12 @@ int btrfs_update_inode(struct btrfs_trans_handle *trans, goto failed; } - inode_item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), - path->slots[0], + leaf = path->nodes[0]; + inode_item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_inode_item); - fill_inode_item(inode_item, inode); - btrfs_mark_buffer_dirty(path->nodes[0]); + fill_inode_item(leaf, inode_item, inode); + btrfs_mark_buffer_dirty(leaf); btrfs_set_inode_last_trans(trans, inode); ret = 0; failed: @@ -330,8 +354,9 @@ static int btrfs_unlink_trans(struct btrfs_trans_handle *trans, const char *name = dentry->d_name.name; int name_len = dentry->d_name.len; int ret = 0; - u64 objectid; + struct extent_buffer *leaf; struct btrfs_dir_item *di; + struct btrfs_key key; path = btrfs_alloc_path(); if (!path) { @@ -349,14 +374,15 @@ static int btrfs_unlink_trans(struct btrfs_trans_handle *trans, ret = -ENOENT; goto err; } - objectid = btrfs_disk_key_objectid(&di->location); + leaf = path->nodes[0]; + btrfs_dir_item_key_to_cpu(leaf, di, &key); ret = btrfs_delete_one_dir_name(trans, root, path, di); if (ret) goto err; btrfs_release_path(root, path); di = btrfs_lookup_dir_index_item(trans, root, path, dir->i_ino, - objectid, name, name_len, -1); + key.objectid, name, name_len, -1); if (IS_ERR(di)) { ret = PTR_ERR(di); goto err; @@ -391,12 +417,15 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry) root = BTRFS_I(dir)->root; mutex_lock(&root->fs_info->fs_mutex); trans = btrfs_start_transaction(root, 1); + btrfs_set_trans_block_group(trans, dir); ret = btrfs_unlink_trans(trans, root, dir, dentry); nr = trans->blocks_used; + btrfs_end_transaction(trans, root); mutex_unlock(&root->fs_info->fs_mutex); btrfs_btree_balance_dirty(root, nr); + return ret; } @@ -411,7 +440,7 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) struct btrfs_trans_handle *trans; struct btrfs_key found_key; int found_type; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; char *goodnames = ".."; unsigned long nr; @@ -419,10 +448,11 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) BUG_ON(!path); mutex_lock(&root->fs_info->fs_mutex); trans = btrfs_start_transaction(root, 1); + btrfs_set_trans_block_group(trans, dir); key.objectid = inode->i_ino; key.offset = (u64)-1; - key.flags = (u32)-1; + key.type = (u8)-1; while(1) { ret = btrfs_search_slot(trans, root, &key, path, -1, 1); if (ret < 0) { @@ -435,9 +465,8 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry) goto out; } path->slots[0]--; - leaf = btrfs_buffer_leaf(path->nodes[0]); - btrfs_disk_key_to_cpu(&found_key, - &leaf->items[path->slots[0]].key); + leaf = path->nodes[0]; + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); found_type = btrfs_key_type(&found_key); if (found_key.objectid != inode->i_ino) { err = -ENOENT; @@ -513,9 +542,9 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans, int ret; struct btrfs_path *path; struct btrfs_key key; - struct btrfs_disk_key *found_key; + struct btrfs_key found_key; u32 found_type; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; struct btrfs_file_extent_item *fi; u64 extent_start = 0; u64 extent_num_blocks = 0; @@ -527,10 +556,12 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans, path = btrfs_alloc_path(); path->reada = -1; BUG_ON(!path); + /* FIXME, add redo link to tree so we don't leak on crash */ key.objectid = inode->i_ino; key.offset = (u64)-1; - key.flags = (u32)-1; + key.type = (u8)-1; + while(1) { btrfs_init_path(path); fi = NULL; @@ -542,27 +573,28 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans, BUG_ON(path->slots[0] == 0); path->slots[0]--; } - leaf = btrfs_buffer_leaf(path->nodes[0]); - found_key = &leaf->items[path->slots[0]].key; - found_type = btrfs_disk_key_type(found_key); + leaf = path->nodes[0]; + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); + found_type = btrfs_key_type(&found_key); - if (btrfs_disk_key_objectid(found_key) != inode->i_ino) + if (found_key.objectid != inode->i_ino) break; + if (found_type != BTRFS_CSUM_ITEM_KEY && found_type != BTRFS_DIR_ITEM_KEY && found_type != BTRFS_DIR_INDEX_KEY && found_type != BTRFS_EXTENT_DATA_KEY) break; - item_end = btrfs_disk_key_offset(found_key); + item_end = found_key.offset; if (found_type == BTRFS_EXTENT_DATA_KEY) { - fi = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), - path->slots[0], + fi = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); - if (btrfs_file_extent_type(fi) != + if (btrfs_file_extent_type(leaf, fi) != BTRFS_FILE_EXTENT_INLINE) { - item_end += btrfs_file_extent_num_blocks(fi) << - inode->i_blkbits; + item_end += + btrfs_file_extent_num_blocks(leaf, fi) << + inode->i_blkbits; } } if (found_type == BTRFS_CSUM_ITEM_KEY) { @@ -583,7 +615,7 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans, btrfs_set_key_type(&key, found_type); continue; } - if (btrfs_disk_key_offset(found_key) >= inode->i_size) + if (found_key.offset >= inode->i_size) del_item = 1; else del_item = 0; @@ -591,30 +623,31 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans, /* FIXME, shrink the extent if the ref count is only 1 */ if (found_type == BTRFS_EXTENT_DATA_KEY && - btrfs_file_extent_type(fi) != + btrfs_file_extent_type(leaf, fi) != BTRFS_FILE_EXTENT_INLINE) { u64 num_dec; - extent_start = btrfs_file_extent_disk_blocknr(fi); + extent_start = btrfs_file_extent_disk_blocknr(leaf, fi); if (!del_item) { u64 orig_num_blocks = - btrfs_file_extent_num_blocks(fi); + btrfs_file_extent_num_blocks(leaf, fi); extent_num_blocks = inode->i_size - - btrfs_disk_key_offset(found_key) + - root->blocksize - 1; + found_key.offset + root->sectorsize - 1; extent_num_blocks >>= inode->i_blkbits; - btrfs_set_file_extent_num_blocks(fi, + btrfs_set_file_extent_num_blocks(leaf, fi, extent_num_blocks); num_dec = (orig_num_blocks - extent_num_blocks) << 3; if (extent_start != 0) { inode->i_blocks -= num_dec; } - btrfs_mark_buffer_dirty(path->nodes[0]); + btrfs_mark_buffer_dirty(leaf); } else { extent_num_blocks = - btrfs_file_extent_disk_num_blocks(fi); + btrfs_file_extent_disk_num_blocks(leaf, + fi); /* FIXME blocksize != 4096 */ - num_dec = btrfs_file_extent_num_blocks(fi) << 3; + num_dec = btrfs_file_extent_num_blocks(leaf, + fi) << 3; if (extent_start != 0) { found_extent = 1; inode->i_blocks -= num_dec; @@ -725,7 +758,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr) struct btrfs_root *root = BTRFS_I(inode)->root; struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; - u64 mask = root->blocksize - 1; + u64 mask = root->sectorsize - 1; u64 pos = (inode->i_size + mask) & ~mask; u64 block_end = attr->ia_size | mask; u64 hole_size; @@ -771,9 +804,11 @@ void btrfs_delete_inode(struct inode *inode) if (is_bad_inode(inode)) { goto no_delete; } + inode->i_size = 0; mutex_lock(&root->fs_info->fs_mutex); trans = btrfs_start_transaction(root, 1); + btrfs_set_trans_block_group(trans, inode); ret = btrfs_truncate_in_trans(trans, root, inode); if (ret) @@ -782,6 +817,7 @@ void btrfs_delete_inode(struct inode *inode) if (ret) goto no_delete_lock; nr = trans->blocks_used; + btrfs_end_transaction(trans, root); mutex_unlock(&root->fs_info->fs_mutex); btrfs_btree_balance_dirty(root, nr); @@ -819,7 +855,7 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry, ret = 0; goto out; } - btrfs_disk_key_to_cpu(location, &di->location); + btrfs_dir_item_key_to_cpu(path->nodes[0], di, location); out: btrfs_release_path(root, path); btrfs_free_path(path); @@ -856,7 +892,6 @@ static int fixup_tree_root_location(struct btrfs_root *root, ri = &(*sub_root)->root_item; location->objectid = btrfs_root_dirid(ri); - location->flags = 0; btrfs_set_key_type(location, BTRFS_INODE_ITEM_KEY); location->offset = 0; @@ -908,11 +943,14 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry, if (dentry->d_name.len > BTRFS_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); + mutex_lock(&root->fs_info->fs_mutex); ret = btrfs_inode_by_name(dir, dentry, &location); mutex_unlock(&root->fs_info->fs_mutex); + if (ret < 0) return ERR_PTR(ret); + inode = NULL; if (location.objectid) { ret = fixup_tree_root_location(root, &location, &sub_root, @@ -952,10 +990,11 @@ static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir) struct btrfs_item *item; struct btrfs_dir_item *di; struct btrfs_key key; + struct btrfs_key found_key; struct btrfs_path *path; int ret; u32 nritems; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; int slot; int advance; unsigned char d_type; @@ -964,15 +1003,19 @@ static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir) u32 di_total; u32 di_len; int key_type = BTRFS_DIR_INDEX_KEY; + char tmp_name[32]; + char *name_ptr; + int name_len; /* FIXME, use a real flag for deciding about the key type */ if (root->fs_info->tree_root == root) key_type = BTRFS_DIR_ITEM_KEY; + mutex_lock(&root->fs_info->fs_mutex); key.objectid = inode->i_ino; - key.flags = 0; btrfs_set_key_type(&key, key_type); key.offset = filp->f_pos; + path = btrfs_alloc_path(); path->reada = 2; ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); @@ -980,16 +1023,16 @@ static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir) goto err; advance = 0; while(1) { - leaf = btrfs_buffer_leaf(path->nodes[0]); - nritems = btrfs_header_nritems(&leaf->header); + leaf = path->nodes[0]; + nritems = btrfs_header_nritems(leaf); slot = path->slots[0]; if (advance || slot >= nritems) { if (slot >= nritems -1) { ret = btrfs_next_leaf(root, path); if (ret) break; - leaf = btrfs_buffer_leaf(path->nodes[0]); - nritems = btrfs_header_nritems(&leaf->header); + leaf = path->nodes[0]; + nritems = btrfs_header_nritems(leaf); slot = path->slots[0]; } else { slot++; @@ -997,28 +1040,48 @@ static int btrfs_readdir(struct file *filp, void *dirent, filldir_t filldir) } } advance = 1; - item = leaf->items + slot; - if (btrfs_disk_key_objectid(&item->key) != key.objectid) + item = btrfs_item_nr(leaf, slot); + btrfs_item_key_to_cpu(leaf, &found_key, slot); + + if (found_key.objectid != key.objectid) break; - if (btrfs_disk_key_type(&item->key) != key_type) + if (btrfs_key_type(&found_key) != key_type) break; - if (btrfs_disk_key_offset(&item->key) < filp->f_pos) + if (found_key.offset < filp->f_pos) continue; - filp->f_pos = btrfs_disk_key_offset(&item->key); + + filp->f_pos = found_key.offset; advance = 1; di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item); di_cur = 0; - di_total = btrfs_item_size(leaf->items + slot); + di_total = btrfs_item_size(leaf, item); while(di_cur < di_total) { - d_type = btrfs_filetype_table[btrfs_dir_type(di)]; - over = filldir(dirent, (const char *)(di + 1), - btrfs_dir_name_len(di), - btrfs_disk_key_offset(&item->key), - btrfs_disk_key_objectid(&di->location), + struct btrfs_key location; + + name_len = btrfs_dir_name_len(leaf, di); + if (name_len < 32) { + name_ptr = tmp_name; + } else { + name_ptr = kmalloc(name_len, GFP_NOFS); + BUG_ON(!name_ptr); + } + read_extent_buffer(leaf, name_ptr, + (unsigned long)(di + 1), name_len); + + d_type = btrfs_filetype_table[btrfs_dir_type(leaf, di)]; + btrfs_dir_item_key_to_cpu(leaf, di, &location); + + over = filldir(dirent, name_ptr, name_len, + found_key.offset, + location.objectid, d_type); + + if (name_ptr != tmp_name) + kfree(name_ptr); + if (over) goto nopos; - di_len = btrfs_dir_name_len(di) + sizeof(*di); + di_len = btrfs_dir_name_len(leaf, di) + sizeof(*di); di_cur += di_len; di = (struct btrfs_dir_item *)((char *)di + di_len); } @@ -1075,11 +1138,15 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, int mode) { struct inode *inode; - struct btrfs_inode_item inode_item; + struct btrfs_inode_item *inode_item; struct btrfs_key *location; + struct btrfs_path *path; int ret; int owner; + path = btrfs_alloc_path(); + BUG_ON(!path); + inode = new_inode(root->fs_info->sb); if (!inode) return ERR_PTR(-ENOMEM); @@ -1095,24 +1162,32 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, group = btrfs_find_block_group(root, group, 0, 0, owner); BTRFS_I(inode)->block_group = group; + ret = btrfs_insert_empty_inode(trans, root, path, objectid); + if (ret) + goto fail; + inode->i_uid = current->fsuid; inode->i_gid = current->fsgid; inode->i_mode = mode; inode->i_ino = objectid; inode->i_blocks = 0; inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; - fill_inode_item(&inode_item, inode); + inode_item = btrfs_item_ptr(path->nodes[0], path->slots[0], + struct btrfs_inode_item); + fill_inode_item(path->nodes[0], inode_item, inode); + btrfs_mark_buffer_dirty(path->nodes[0]); + btrfs_free_path(path); + location = &BTRFS_I(inode)->location; location->objectid = objectid; - location->flags = 0; location->offset = 0; btrfs_set_key_type(location, BTRFS_INODE_ITEM_KEY); - ret = btrfs_insert_inode(trans, root, objectid, &inode_item); - if (ret) - return ERR_PTR(ret); insert_inode_hash(inode); return inode; +fail: + btrfs_free_path(path); + return ERR_PTR(ret); } static inline u8 btrfs_inode_type(struct inode *inode) @@ -1127,8 +1202,8 @@ static int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_key key; struct btrfs_root *root = BTRFS_I(dentry->d_parent->d_inode)->root; struct inode *parent_inode; + key.objectid = inode->i_ino; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY); key.offset = 0; @@ -1285,14 +1360,18 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, inc_nlink(inode); mutex_lock(&root->fs_info->fs_mutex); trans = btrfs_start_transaction(root, 1); + btrfs_set_trans_block_group(trans, dir); atomic_inc(&inode->i_count); err = btrfs_add_nondir(trans, dentry, inode); + if (err) drop_inode = 1; + dir->i_sb->s_dirt = 1; btrfs_update_inode_block_group(trans, dir); err = btrfs_update_inode(trans, root, inode); + if (err) drop_inode = 1; @@ -1321,13 +1400,13 @@ static int btrfs_make_empty_dir(struct btrfs_trans_handle *trans, key.objectid = objectid; key.offset = 0; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY); ret = btrfs_insert_dir_item(trans, root, buf, 1, objectid, &key, BTRFS_FT_DIR); if (ret) goto error; + key.objectid = dirid; ret = btrfs_insert_dir_item(trans, root, buf, 2, objectid, &key, BTRFS_FT_DIR); @@ -1350,6 +1429,7 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) mutex_lock(&root->fs_info->fs_mutex); trans = btrfs_start_transaction(root, 1); btrfs_set_trans_block_group(trans, dir); + if (IS_ERR(trans)) { err = PTR_ERR(trans); goto out_unlock; @@ -1367,6 +1447,7 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) err = PTR_ERR(inode); goto out_fail; } + drop_on_err = 1; inode->i_op = &btrfs_dir_inode_operations; inode->i_fop = &btrfs_dir_file_operations; @@ -1380,9 +1461,11 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) err = btrfs_update_inode(trans, root, inode); if (err) goto out_fail; + err = btrfs_add_link(trans, dentry, inode); if (err) goto out_fail; + d_instantiate(dentry, inode); drop_on_err = 0; dir->i_sb->s_dirt = 1; @@ -1392,6 +1475,7 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) out_fail: nr = trans->blocks_used; btrfs_end_transaction(trans, root); + out_unlock: mutex_unlock(&root->fs_info->fs_mutex); if (drop_on_err) @@ -1415,8 +1499,8 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, struct btrfs_path *path; struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_file_extent_item *item; - struct btrfs_leaf *leaf; - struct btrfs_disk_key *found_key; + struct extent_buffer *leaf; + struct btrfs_key found_key; struct extent_map *em = NULL; struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; struct btrfs_trans_handle *trans = NULL; @@ -1436,8 +1520,8 @@ again: err = -ENOMEM; goto out; } - em->start = 0; - em->end = 0; + em->start = EXTENT_MAP_HOLE; + em->end = EXTENT_MAP_HOLE; } em->bdev = inode->i_sb->s_bdev; ret = btrfs_lookup_file_extent(NULL, root, path, @@ -1453,25 +1537,27 @@ again: path->slots[0]--; } - item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0], + leaf = path->nodes[0]; + item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); - leaf = btrfs_buffer_leaf(path->nodes[0]); - blocknr = btrfs_file_extent_disk_blocknr(item); - blocknr += btrfs_file_extent_offset(item); + + blocknr = btrfs_file_extent_disk_blocknr(leaf, item); + blocknr += btrfs_file_extent_offset(leaf, item); /* are we inside the extent that was found? */ - found_key = &leaf->items[path->slots[0]].key; - found_type = btrfs_disk_key_type(found_key); - if (btrfs_disk_key_objectid(found_key) != objectid || + btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]); + found_type = btrfs_key_type(&found_key); + if (found_key.objectid != objectid || found_type != BTRFS_EXTENT_DATA_KEY) { goto not_found; } - found_type = btrfs_file_extent_type(item); - extent_start = btrfs_disk_key_offset(&leaf->items[path->slots[0]].key); + found_type = btrfs_file_extent_type(leaf, item); + extent_start = found_key.offset; if (found_type == BTRFS_FILE_EXTENT_REG) { extent_end = extent_start + - (btrfs_file_extent_num_blocks(item) << inode->i_blkbits); + (btrfs_file_extent_num_blocks(leaf, item) << + inode->i_blkbits); err = 0; if (start < extent_start || start >= extent_end) { em->start = start; @@ -1484,28 +1570,29 @@ again: } goto not_found_em; } - if (btrfs_file_extent_disk_blocknr(item) == 0) { + if (btrfs_file_extent_disk_blocknr(leaf, item) == 0) { em->start = extent_start; em->end = extent_end - 1; - em->block_start = 0; - em->block_end = 0; + em->block_start = EXTENT_MAP_HOLE; + em->block_end = EXTENT_MAP_HOLE; goto insert; } em->block_start = blocknr << inode->i_blkbits; em->block_end = em->block_start + - (btrfs_file_extent_num_blocks(item) << + (btrfs_file_extent_num_blocks(leaf, item) << inode->i_blkbits) - 1; em->start = extent_start; em->end = extent_end - 1; goto insert; } else if (found_type == BTRFS_FILE_EXTENT_INLINE) { - char *ptr; + unsigned long ptr; char *map; u32 size; - size = btrfs_file_extent_inline_len(leaf->items + - path->slots[0]); - extent_end = extent_start | ((u64)root->blocksize - 1); + size = btrfs_file_extent_inline_len(leaf, btrfs_item_nr(leaf, + path->slots[0])); + + extent_end = extent_start | ((u64)root->sectorsize - 1); if (start < extent_start || start >= extent_end) { em->start = start; if (start < extent_start) { @@ -1517,18 +1604,21 @@ again: } goto not_found_em; } + em->block_start = EXTENT_MAP_INLINE; em->block_end = EXTENT_MAP_INLINE; em->start = extent_start; em->end = extent_end; + if (!page) { goto insert; } + ptr = btrfs_file_extent_inline_start(item); map = kmap(page); - memcpy(map + page_offset, ptr, size); + read_extent_buffer(leaf, map + page_offset, ptr, size); memset(map + page_offset + size, 0, - root->blocksize - (page_offset + size)); + root->sectorsize - (page_offset + size)); flush_dcache_page(page); kunmap(page); set_extent_uptodate(em_tree, extent_start, @@ -1542,8 +1632,8 @@ not_found: em->start = start; em->end = end; not_found_em: - em->block_start = 0; - em->block_end = 0; + em->block_start = EXTENT_MAP_HOLE; + em->block_end = EXTENT_MAP_HOLE; insert: btrfs_release_path(root, path); if (em->start > start || em->end < start) { @@ -1712,6 +1802,7 @@ static void btrfs_truncate(struct inode *inode) ret = btrfs_truncate_in_trans(trans, root, inode); btrfs_update_inode(trans, root, inode); nr = trans->blocks_used; + ret = btrfs_end_transaction(trans, root); BUG_ON(ret); mutex_unlock(&root->fs_info->fs_mutex); @@ -1731,8 +1822,7 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen) struct btrfs_key key; struct btrfs_root_item root_item; struct btrfs_inode_item *inode_item; - struct buffer_head *subvol; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; struct btrfs_root *new_root; struct inode *inode; struct inode *dir; @@ -1746,34 +1836,37 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen) trans = btrfs_start_transaction(root, 1); BUG_ON(!trans); - subvol = btrfs_alloc_free_block(trans, root, 0, 0); - if (IS_ERR(subvol)) - return PTR_ERR(subvol); - leaf = btrfs_buffer_leaf(subvol); - btrfs_set_header_nritems(&leaf->header, 0); - btrfs_set_header_level(&leaf->header, 0); - btrfs_set_header_blocknr(&leaf->header, bh_blocknr(subvol)); - btrfs_set_header_generation(&leaf->header, trans->transid); - btrfs_set_header_owner(&leaf->header, root->root_key.objectid); - memcpy(leaf->header.fsid, root->fs_info->disk_super->fsid, - sizeof(leaf->header.fsid)); - btrfs_mark_buffer_dirty(subvol); + leaf = btrfs_alloc_free_block(trans, root, 0, 0); + if (IS_ERR(leaf)) + return PTR_ERR(leaf); + + btrfs_set_header_nritems(leaf, 0); + btrfs_set_header_level(leaf, 0); + btrfs_set_header_blocknr(leaf, extent_buffer_blocknr(leaf)); + btrfs_set_header_generation(leaf, trans->transid); + btrfs_set_header_owner(leaf, root->root_key.objectid); + write_extent_buffer(leaf, root->fs_info->fsid, + (unsigned long)btrfs_header_fsid(leaf), + BTRFS_FSID_SIZE); + btrfs_mark_buffer_dirty(leaf); inode_item = &root_item.inode; memset(inode_item, 0, sizeof(*inode_item)); - btrfs_set_inode_generation(inode_item, 1); - btrfs_set_inode_size(inode_item, 3); - btrfs_set_inode_nlink(inode_item, 1); - btrfs_set_inode_nblocks(inode_item, 1); - btrfs_set_inode_mode(inode_item, S_IFDIR | 0755); + inode_item->generation = cpu_to_le64(1); + inode_item->size = cpu_to_le64(3); + inode_item->nlink = cpu_to_le32(1); + inode_item->nblocks = cpu_to_le64(1); + inode_item->mode = cpu_to_le32(S_IFDIR | 0755); - btrfs_set_root_blocknr(&root_item, bh_blocknr(subvol)); + btrfs_set_root_blocknr(&root_item, extent_buffer_blocknr(leaf)); btrfs_set_root_refs(&root_item, 1); - btrfs_set_root_blocks_used(&root_item, 0); + btrfs_set_root_used(&root_item, 0); + memset(&root_item.drop_progress, 0, sizeof(root_item.drop_progress)); root_item.drop_level = 0; - brelse(subvol); - subvol = NULL; + + free_extent_buffer(leaf); + leaf = NULL; ret = btrfs_find_free_objectid(trans, root->fs_info->tree_root, 0, &objectid); @@ -1784,7 +1877,6 @@ static int create_subvol(struct btrfs_root *root, char *name, int namelen) key.objectid = objectid; key.offset = 1; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key, &root_item); @@ -1845,7 +1937,7 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen) struct btrfs_trans_handle *trans; struct btrfs_key key; struct btrfs_root_item new_root_item; - struct buffer_head *tmp; + struct extent_buffer *tmp; int ret; int err; u64 objectid; @@ -1876,10 +1968,11 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen) key.objectid = objectid; key.offset = 1; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); + btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp); - btrfs_set_root_blocknr(&new_root_item, bh_blocknr(root->node)); + btrfs_set_root_blocknr(&new_root_item, + extent_buffer_blocknr(root->node)); ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key, &new_root_item); @@ -1904,8 +1997,10 @@ static int create_snapshot(struct btrfs_root *root, char *name, int namelen) fail: nr = trans->blocks_used; err = btrfs_commit_transaction(trans, root); + if (err && !ret) ret = err; + mutex_unlock(&root->fs_info->fs_mutex); up_write(&root->snap_sem); btrfs_btree_balance_dirty(root, nr); @@ -1986,7 +2081,7 @@ static int btrfs_ioctl_snap_create(struct btrfs_root *root, void __user *arg) if (copy_from_user(&vol_args, arg, sizeof(vol_args))) return -EFAULT; - + namelen = strlen(vol_args.name); if (namelen > BTRFS_VOL_NAME_MAX) return -EINVAL; @@ -2164,8 +2259,10 @@ static int btrfs_rename(struct inode * old_dir, struct dentry *old_dentry, new_inode->i_size > BTRFS_EMPTY_DIR_SIZE) { return -ENOTEMPTY; } + mutex_lock(&root->fs_info->fs_mutex); trans = btrfs_start_transaction(root, 1); + btrfs_set_trans_block_group(trans, new_dir); path = btrfs_alloc_path(); if (!path) { @@ -2177,9 +2274,10 @@ static int btrfs_rename(struct inode * old_dir, struct dentry *old_dentry, old_dir->i_ctime = old_dir->i_mtime = ctime; new_dir->i_ctime = new_dir->i_mtime = ctime; old_inode->i_ctime = ctime; + if (S_ISDIR(old_inode->i_mode) && old_dir != new_dir) { struct btrfs_key *location = &BTRFS_I(new_dir)->location; - u64 old_parent_oid; + struct btrfs_key old_parent_key; di = btrfs_lookup_dir_item(trans, root, path, old_inode->i_ino, "..", 2, -1); if (IS_ERR(di)) { @@ -2190,7 +2288,7 @@ static int btrfs_rename(struct inode * old_dir, struct dentry *old_dentry, ret = -ENOENT; goto out_fail; } - old_parent_oid = btrfs_disk_key_objectid(&di->location); + btrfs_dir_item_key_to_cpu(path->nodes[0], di, &old_parent_key); ret = btrfs_del_item(trans, root, path); if (ret) { goto out_fail; @@ -2199,7 +2297,7 @@ static int btrfs_rename(struct inode * old_dir, struct dentry *old_dentry, di = btrfs_lookup_dir_index_item(trans, root, path, old_inode->i_ino, - old_parent_oid, + old_parent_key.objectid, "..", 2, -1); if (IS_ERR(di)) { ret = PTR_ERR(di); @@ -2257,8 +2355,9 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, u64 objectid; int name_len; int datasize; - char *ptr; + unsigned long ptr; struct btrfs_file_extent_item *ei; + struct extent_buffer *leaf; unsigned long nr; name_len = strlen(symname) + 1; @@ -2302,7 +2401,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, BUG_ON(!path); key.objectid = inode->i_ino; key.offset = 0; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY); datasize = btrfs_file_extent_calc_inline_size(name_len); err = btrfs_insert_empty_item(trans, root, path, &key, @@ -2311,16 +2409,17 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, drop_inode = 1; goto out_unlock; } - ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), - path->slots[0], struct btrfs_file_extent_item); - btrfs_set_file_extent_generation(ei, trans->transid); - btrfs_set_file_extent_type(ei, + leaf = path->nodes[0]; + ei = btrfs_item_ptr(leaf, path->slots[0], + struct btrfs_file_extent_item); + btrfs_set_file_extent_generation(leaf, ei, trans->transid); + btrfs_set_file_extent_type(leaf, ei, BTRFS_FILE_EXTENT_INLINE); ptr = btrfs_file_extent_inline_start(ei); - btrfs_memcpy(root, path->nodes[0]->b_data, - ptr, symname, name_len); - btrfs_mark_buffer_dirty(path->nodes[0]); + write_extent_buffer(leaf, symname, ptr, name_len); + btrfs_mark_buffer_dirty(leaf); btrfs_free_path(path); + inode->i_op = &btrfs_symlink_inode_operations; inode->i_mapping->a_ops = &btrfs_symlink_aops; inode->i_size = name_len - 1; diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c index bafa78603bd2..a825ce078a54 100644 --- a/fs/btrfs/print-tree.c +++ b/fs/btrfs/print-tree.c @@ -20,10 +20,10 @@ #include "disk-io.h" #include "print-tree.h" -void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l) +void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) { int i; - u32 nr = btrfs_header_nritems(&l->header); + u32 nr = btrfs_header_nritems(l); struct btrfs_item *item; struct btrfs_extent_item *ei; struct btrfs_root_item *ri; @@ -31,119 +31,113 @@ void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l) struct btrfs_inode_item *ii; struct btrfs_block_group_item *bi; struct btrfs_file_extent_item *fi; + struct btrfs_key key; + struct btrfs_key found_key; u32 type; printk("leaf %llu total ptrs %d free space %d\n", - (unsigned long long)btrfs_header_blocknr(&l->header), nr, + (unsigned long long)btrfs_header_blocknr(l), nr, btrfs_leaf_free_space(root, l)); for (i = 0 ; i < nr ; i++) { - item = l->items + i; - type = btrfs_disk_key_type(&item->key); + item = btrfs_item_nr(l, i); + btrfs_item_key_to_cpu(l, &key, i); + type = btrfs_key_type(&key); printk("\titem %d key (%llu %x %llu) itemoff %d itemsize %d\n", i, - (unsigned long long)btrfs_disk_key_objectid(&item->key), - btrfs_disk_key_flags(&item->key), - (unsigned long long)btrfs_disk_key_offset(&item->key), - btrfs_item_offset(item), - btrfs_item_size(item)); + (unsigned long long)key.objectid, type, + (unsigned long long)key.offset, + btrfs_item_offset(l, item), btrfs_item_size(l, item)); switch (type) { case BTRFS_INODE_ITEM_KEY: ii = btrfs_item_ptr(l, i, struct btrfs_inode_item); printk("\t\tinode generation %llu size %llu mode %o\n", - (unsigned long long)btrfs_inode_generation(ii), - (unsigned long long)btrfs_inode_size(ii), - btrfs_inode_mode(ii)); + (unsigned long long)btrfs_inode_generation(l, ii), + (unsigned long long)btrfs_inode_size(l, ii), + btrfs_inode_mode(l, ii)); break; case BTRFS_DIR_ITEM_KEY: di = btrfs_item_ptr(l, i, struct btrfs_dir_item); + btrfs_dir_item_key_to_cpu(l, di, &found_key); printk("\t\tdir oid %llu flags %u type %u\n", - (unsigned long long)btrfs_disk_key_objectid( - &di->location), - btrfs_dir_flags(di), - btrfs_dir_type(di)); - printk("\t\tname %.*s\n", - btrfs_dir_name_len(di),(char *)(di + 1)); + (unsigned long long)found_key.objectid, + btrfs_dir_flags(l, di), + btrfs_dir_type(l, di)); break; case BTRFS_ROOT_ITEM_KEY: ri = btrfs_item_ptr(l, i, struct btrfs_root_item); printk("\t\troot data blocknr %llu refs %u\n", - (unsigned long long)btrfs_root_blocknr(ri), - btrfs_root_refs(ri)); + (unsigned long long)btrfs_disk_root_blocknr(l, ri), + btrfs_disk_root_refs(l, ri)); break; case BTRFS_EXTENT_ITEM_KEY: ei = btrfs_item_ptr(l, i, struct btrfs_extent_item); printk("\t\textent data refs %u\n", - btrfs_extent_refs(ei)); + btrfs_extent_refs(l, ei)); break; case BTRFS_EXTENT_DATA_KEY: fi = btrfs_item_ptr(l, i, struct btrfs_file_extent_item); - if (btrfs_file_extent_type(fi) == + if (btrfs_file_extent_type(l, fi) == BTRFS_FILE_EXTENT_INLINE) { printk("\t\tinline extent data size %u\n", - btrfs_file_extent_inline_len(l->items + i)); + btrfs_file_extent_inline_len(l, item)); break; } printk("\t\textent data disk block %llu nr %llu\n", - (unsigned long long)btrfs_file_extent_disk_blocknr(fi), - (unsigned long long)btrfs_file_extent_disk_num_blocks(fi)); + (unsigned long long)btrfs_file_extent_disk_blocknr(l, fi), + (unsigned long long)btrfs_file_extent_disk_num_blocks(l, fi)); printk("\t\textent data offset %llu nr %llu\n", - (unsigned long long)btrfs_file_extent_offset(fi), - (unsigned long long)btrfs_file_extent_num_blocks(fi)); + (unsigned long long)btrfs_file_extent_offset(l, fi), + (unsigned long long)btrfs_file_extent_num_blocks(l, fi)); break; case BTRFS_BLOCK_GROUP_ITEM_KEY: bi = btrfs_item_ptr(l, i, struct btrfs_block_group_item); printk("\t\tblock group used %llu\n", - (unsigned long long)btrfs_block_group_used(bi)); - break; - case BTRFS_STRING_ITEM_KEY: - printk("\t\titem data %.*s\n", btrfs_item_size(item), - btrfs_leaf_data(l) + btrfs_item_offset(item)); + (unsigned long long)btrfs_disk_block_group_used(l, bi)); break; }; } } -void btrfs_print_tree(struct btrfs_root *root, struct buffer_head *t) +void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c) { int i; u32 nr; - struct btrfs_node *c; + struct btrfs_key key; - if (!t) + if (!c) return; - c = btrfs_buffer_node(t); - nr = btrfs_header_nritems(&c->header); + nr = btrfs_header_nritems(c); if (btrfs_is_leaf(c)) { - btrfs_print_leaf(root, (struct btrfs_leaf *)c); + btrfs_print_leaf(root, c); return; } printk("node %llu level %d total ptrs %d free spc %u\n", - (unsigned long long)btrfs_header_blocknr(&c->header), - btrfs_header_level(&c->header), nr, + (unsigned long long)btrfs_header_blocknr(c), + btrfs_header_level(c), nr, (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr); for (i = 0; i < nr; i++) { + btrfs_node_key_to_cpu(c, &key, i); printk("\tkey %d (%llu %u %llu) block %llu\n", i, - (unsigned long long)c->ptrs[i].key.objectid, - c->ptrs[i].key.flags, - (unsigned long long)c->ptrs[i].key.offset, + (unsigned long long)key.objectid, + key.type, + (unsigned long long)key.offset, (unsigned long long)btrfs_node_blockptr(c, i)); } for (i = 0; i < nr; i++) { - struct buffer_head *next_buf = read_tree_block(root, + struct extent_buffer *next = read_tree_block(root, btrfs_node_blockptr(c, i)); - struct btrfs_node *next = btrfs_buffer_node(next_buf); if (btrfs_is_leaf(next) && - btrfs_header_level(&c->header) != 1) + btrfs_header_level(c) != 1) BUG(); - if (btrfs_header_level(&next->header) != - btrfs_header_level(&c->header) - 1) + if (btrfs_header_level(next) != + btrfs_header_level(c) - 1) BUG(); - btrfs_print_tree(root, next_buf); - btrfs_block_release(root, next_buf); + btrfs_print_tree(root, next); + free_extent_buffer(next); } } diff --git a/fs/btrfs/print-tree.h b/fs/btrfs/print-tree.h index 205cd03601ab..da75efe534d5 100644 --- a/fs/btrfs/print-tree.h +++ b/fs/btrfs/print-tree.h @@ -18,6 +18,6 @@ #ifndef __PRINT_TREE_ #define __PRINT_TREE_ -void btrfs_print_leaf(struct btrfs_root *root, struct btrfs_leaf *l); -void btrfs_print_tree(struct btrfs_root *root, struct buffer_head *t); +void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l); +void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *t); #endif diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index 3b5926dfbeba..88bcdd33f56e 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -26,12 +26,13 @@ int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, { struct btrfs_path *path; struct btrfs_key search_key; - struct btrfs_leaf *l; + struct btrfs_key found_key; + struct extent_buffer *l; int ret; int slot; search_key.objectid = objectid; - search_key.flags = (u32)-1; + search_key.type = (u8)-1; search_key.offset = (u64)-1; path = btrfs_alloc_path(); @@ -39,17 +40,19 @@ int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0); if (ret < 0) goto out; + BUG_ON(ret == 0); - l = btrfs_buffer_leaf(path->nodes[0]); + l = path->nodes[0]; BUG_ON(path->slots[0] == 0); slot = path->slots[0] - 1; - if (btrfs_disk_key_objectid(&l->items[slot].key) != objectid) { + btrfs_item_key_to_cpu(l, &found_key, slot); + if (found_key.objectid != objectid) { ret = 1; goto out; } - memcpy(item, btrfs_item_ptr(l, slot, struct btrfs_root_item), - sizeof(*item)); - btrfs_disk_key_to_cpu(key, &l->items[slot].key); + read_extent_buffer(l, item, btrfs_item_ptr_offset(l, slot), + sizeof(*item)); + memcpy(key, &found_key, sizeof(found_key)); ret = 0; out: btrfs_release_path(root, path); @@ -62,10 +65,10 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root *item) { struct btrfs_path *path; - struct btrfs_leaf *l; + struct extent_buffer *l; int ret; int slot; - struct btrfs_root_item *update_item; + unsigned long ptr; path = btrfs_alloc_path(); BUG_ON(!path); @@ -73,10 +76,10 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root if (ret < 0) goto out; BUG_ON(ret != 0); - l = btrfs_buffer_leaf(path->nodes[0]); + l = path->nodes[0]; slot = path->slots[0]; - update_item = btrfs_item_ptr(l, slot, struct btrfs_root_item); - btrfs_memcpy(root, l, update_item, item, sizeof(*item)); + ptr = btrfs_item_ptr_offset(l, slot); + write_extent_buffer(l, item, ptr, sizeof(*item)); btrfs_mark_buffer_dirty(path->nodes[0]); out: btrfs_release_path(root, path); @@ -103,11 +106,10 @@ int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, struct btrfs_path *path; int ret; u32 nritems; - struct btrfs_leaf *leaf; + struct extent_buffer *leaf; int slot; key.objectid = objectid; - key.flags = 0; btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); key.offset = 0; path = btrfs_alloc_path(); @@ -117,19 +119,19 @@ int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, if (ret < 0) goto err; while(1) { - leaf = btrfs_buffer_leaf(path->nodes[0]); - nritems = btrfs_header_nritems(&leaf->header); + leaf = path->nodes[0]; + nritems = btrfs_header_nritems(leaf); slot = path->slots[0]; if (slot >= nritems) { ret = btrfs_next_leaf(root, path); if (ret) break; - leaf = btrfs_buffer_leaf(path->nodes[0]); - nritems = btrfs_header_nritems(&leaf->header); + leaf = path->nodes[0]; + nritems = btrfs_header_nritems(leaf); slot = path->slots[0]; } - item = leaf->items + slot; - btrfs_disk_key_to_cpu(&key, &item->key); + item = btrfs_item_nr(leaf, slot); + btrfs_item_key_to_cpu(leaf, &key, slot); if (btrfs_key_type(&key) != BTRFS_ROOT_ITEM_KEY) goto next; @@ -140,7 +142,7 @@ int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, break; ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item); - if (btrfs_root_refs(ri) != 0) + if (btrfs_disk_root_refs(leaf, ri) != 0) goto next; dead_root = btrfs_read_fs_root_no_radix(root->fs_info, &key); @@ -170,6 +172,7 @@ int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, int ret; u32 refs; struct btrfs_root_item *ri; + struct extent_buffer *leaf; path = btrfs_alloc_path(); BUG_ON(!path); @@ -177,10 +180,10 @@ int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, if (ret < 0) goto out; BUG_ON(ret != 0); - ri = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), - path->slots[0], struct btrfs_root_item); + leaf = path->nodes[0]; + ri = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_root_item); - refs = btrfs_root_refs(ri); + refs = btrfs_disk_root_refs(leaf, ri); BUG_ON(refs != 0); ret = btrfs_del_item(trans, root, path); out: diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 66a01cbbbea1..39a1435c68f1 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -41,7 +41,7 @@ #include "ioctl.h" #include "print-tree.h" -#define BTRFS_SUPER_MAGIC 0x9123682E +#define BTRFS_SUPER_MAGIC 0x9123683E static struct super_operations btrfs_super_ops; @@ -115,13 +115,12 @@ static int btrfs_fill_super(struct super_block * sb, void * data, int silent) return -EIO; } sb->s_fs_info = tree_root; - disk_super = tree_root->fs_info->disk_super; + disk_super = &tree_root->fs_info->super_copy; inode = btrfs_iget_locked(sb, btrfs_super_root_dir(disk_super), tree_root); bi = BTRFS_I(inode); bi->location.objectid = inode->i_ino; bi->location.offset = 0; - bi->location.flags = 0; bi->root = tree_root; btrfs_set_key_type(&bi->location, BTRFS_INODE_ITEM_KEY); @@ -281,6 +280,7 @@ error_s: error_bdev: close_bdev_excl(bdev); error: +printk("get_sb failed\n"); return error; } /* end copy & paste */ @@ -295,6 +295,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, ret = btrfs_get_sb_bdev(fs_type, flags, dev_name, data, btrfs_fill_super, mnt, subvol_name ? subvol_name : "default"); +printk("btrfs_get_sb returns %d\n", ret); return ret; } diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 2058783373eb..9654e90eec89 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -31,31 +31,31 @@ static ssize_t root_blocks_used_show(struct btrfs_root *root, char *buf) { return snprintf(buf, PAGE_SIZE, "%llu\n", - (unsigned long long)btrfs_root_blocks_used(&root->root_item)); + (unsigned long long)btrfs_root_used(&root->root_item)); } static ssize_t root_block_limit_show(struct btrfs_root *root, char *buf) { return snprintf(buf, PAGE_SIZE, "%llu\n", - (unsigned long long)btrfs_root_block_limit(&root->root_item)); + (unsigned long long)btrfs_root_limit(&root->root_item)); } static ssize_t super_blocks_used_show(struct btrfs_fs_info *fs, char *buf) { return snprintf(buf, PAGE_SIZE, "%llu\n", - (unsigned long long)btrfs_super_blocks_used(fs->disk_super)); + (unsigned long long)btrfs_super_blocks_used(&fs->super_copy)); } static ssize_t super_total_blocks_show(struct btrfs_fs_info *fs, char *buf) { return snprintf(buf, PAGE_SIZE, "%llu\n", - (unsigned long long)btrfs_super_total_blocks(fs->disk_super)); + (unsigned long long)btrfs_super_total_blocks(&fs->super_copy)); } static ssize_t super_blocksize_show(struct btrfs_fs_info *fs, char *buf) { return snprintf(buf, PAGE_SIZE, "%llu\n", - (unsigned long long)btrfs_super_blocksize(fs->disk_super)); + (unsigned long long)btrfs_super_sectorsize(&fs->super_copy)); } /* this is for root attrs (subvols/snapshots) */ diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 087074db0bd5..750f35a37aae 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -19,6 +19,7 @@ #include #include #include +#include #include "ctree.h" #include "disk-io.h" #include "transaction.h" @@ -66,7 +67,9 @@ static int join_transaction(struct btrfs_root *root) cur_trans->commit_done = 0; cur_trans->start_time = get_seconds(); list_add_tail(&cur_trans->list, &root->fs_info->trans_list); - init_bit_radix(&cur_trans->dirty_pages); + extent_map_tree_init(&cur_trans->dirty_pages, + root->fs_info->btree_inode->i_mapping, + GFP_NOFS); } else { cur_trans->num_writers++; cur_trans->num_joined++; @@ -88,7 +91,7 @@ static int record_root_in_trans(struct btrfs_root *root) (unsigned long)root->root_key.objectid, BTRFS_ROOT_DEFRAG_TAG); root->commit_root = root->node; - get_bh(root->node); + extent_buffer_get(root->node); } else { WARN_ON(1); } @@ -144,29 +147,30 @@ int btrfs_end_transaction(struct btrfs_trans_handle *trans, int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans, struct btrfs_root *root) { - unsigned long gang[16]; int ret; - int i; int err; int werr = 0; + struct extent_map_tree *dirty_pages; struct page *page; - struct radix_tree_root *dirty_pages; struct inode *btree_inode = root->fs_info->btree_inode; + u64 start; + u64 end; + unsigned long index; if (!trans || !trans->transaction) { return filemap_write_and_wait(btree_inode->i_mapping); } dirty_pages = &trans->transaction->dirty_pages; while(1) { - ret = find_first_radix_bit(dirty_pages, gang, - 0, ARRAY_SIZE(gang)); - if (!ret) + ret = find_first_extent_bit(dirty_pages, 0, &start, &end, + EXTENT_DIRTY); + if (ret) break; - for (i = 0; i < ret; i++) { - /* FIXME EIO */ - clear_radix_bit(dirty_pages, gang[i]); - page = find_lock_page(btree_inode->i_mapping, - gang[i]); + clear_extent_dirty(dirty_pages, start, end, GFP_NOFS); + while(start <= end) { + index = start >> PAGE_CACHE_SHIFT; + start = (index + 1) << PAGE_CACHE_SHIFT; + page = find_lock_page(btree_inode->i_mapping, index); if (!page) continue; if (PageWriteback(page)) { @@ -202,10 +206,11 @@ int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans, btrfs_write_dirty_block_groups(trans, extent_root); while(1) { old_extent_block = btrfs_root_blocknr(&extent_root->root_item); - if (old_extent_block == bh_blocknr(extent_root->node)) + if (old_extent_block == + extent_buffer_blocknr(extent_root->node)) break; btrfs_set_root_blocknr(&extent_root->root_item, - bh_blocknr(extent_root->node)); + extent_buffer_blocknr(extent_root->node)); ret = btrfs_update_root(trans, tree_root, &extent_root->root_key, &extent_root->root_item); @@ -279,9 +284,9 @@ static int add_dirty_roots(struct btrfs_trans_handle *trans, (unsigned long)root->root_key.objectid, BTRFS_ROOT_TRANS_TAG); if (root->commit_root == root->node) { - WARN_ON(bh_blocknr(root->node) != + WARN_ON(extent_buffer_blocknr(root->node) != btrfs_root_blocknr(&root->root_item)); - brelse(root->commit_root); + free_extent_buffer(root->commit_root); root->commit_root = NULL; /* make sure to update the root on disk @@ -310,7 +315,7 @@ static int add_dirty_roots(struct btrfs_trans_handle *trans, root->root_key.offset = root->fs_info->generation; btrfs_set_root_blocknr(&root->root_item, - bh_blocknr(root->node)); + extent_buffer_blocknr(root->node)); err = btrfs_insert_root(trans, root->fs_info->tree_root, &root->root_key, &root->root_item); @@ -389,10 +394,10 @@ int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info) for (i = 0; i < ret; i++) { root = gang[i]; last = root->root_key.objectid + 1; - btrfs_defrag_root(root, 1); + // btrfs_defrag_root(root, 1); } } - btrfs_defrag_root(info->extent_root, 1); + // btrfs_defrag_root(info->extent_root, 1); return err; } @@ -414,7 +419,7 @@ static int drop_dirty_roots(struct btrfs_root *tree_root, dirty = list_entry(list->next, struct dirty_root, list); list_del_init(&dirty->list); - num_blocks = btrfs_root_blocks_used(&dirty->root->root_item); + num_blocks = btrfs_root_used(&dirty->root->root_item); root = dirty->latest_root; while(1) { @@ -441,11 +446,11 @@ static int drop_dirty_roots(struct btrfs_root *tree_root, } BUG_ON(ret); - num_blocks -= btrfs_root_blocks_used(&dirty->root->root_item); - blocks_used = btrfs_root_blocks_used(&root->root_item); + num_blocks -= btrfs_root_used(&dirty->root->root_item); + blocks_used = btrfs_root_used(&root->root_item); if (num_blocks) { record_root_in_trans(root); - btrfs_set_root_blocks_used(&root->root_item, + btrfs_set_root_used(&root->root_item, blocks_used - num_blocks); } ret = btrfs_del_root(trans, tree_root, &dirty->root->root_key); @@ -553,9 +558,11 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, btrfs_set_super_generation(&root->fs_info->super_copy, cur_trans->transid); btrfs_set_super_root(&root->fs_info->super_copy, - bh_blocknr(root->fs_info->tree_root->node)); - memcpy(root->fs_info->disk_super, &root->fs_info->super_copy, - sizeof(root->fs_info->super_copy)); + extent_buffer_blocknr(root->fs_info->tree_root->node)); + + write_extent_buffer(root->fs_info->sb_buffer, + &root->fs_info->super_copy, 0, + sizeof(root->fs_info->super_copy)); btrfs_copy_pinned(root, &pinned_copy); diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index 4bc328cbb24c..ae39fcfc169a 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -28,7 +28,7 @@ struct btrfs_transaction { int use_count; int commit_done; struct list_head list; - struct radix_tree_root dirty_pages; + struct extent_map_tree dirty_pages; unsigned long start_time; wait_queue_head_t writer_wait; wait_queue_head_t commit_wait; @@ -83,5 +83,6 @@ int btrfs_add_dead_root(struct btrfs_root *root, struct btrfs_root *latest, int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info); int btrfs_defrag_root(struct btrfs_root *root, int cacheonly); int btrfs_clean_old_snapshots(struct btrfs_root *root); - +int btrfs_commit_transaction(struct btrfs_trans_handle *trans, + struct btrfs_root *root); #endif diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c index 420597127ed1..daf019afa0a1 100644 --- a/fs/btrfs/tree-defrag.c +++ b/fs/btrfs/tree-defrag.c @@ -23,14 +23,14 @@ #include "transaction.h" static void reada_defrag(struct btrfs_root *root, - struct btrfs_node *node) + struct extent_buffer *node) { int i; u32 nritems; u64 blocknr; int ret; - nritems = btrfs_header_nritems(&node->header); + nritems = btrfs_header_nritems(node); for (i = 0; i < nritems; i++) { blocknr = btrfs_node_blockptr(node, i); ret = readahead_tree_block(root, blocknr); @@ -44,8 +44,8 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans, struct btrfs_path *path, int *level, int cache_only, u64 *last_ret) { - struct buffer_head *next; - struct buffer_head *cur; + struct extent_buffer *next; + struct extent_buffer *cur; u64 blocknr; int ret = 0; int is_extent = 0; @@ -62,13 +62,13 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans, cur = path->nodes[*level]; if (!cache_only && *level > 1 && path->slots[*level] == 0) - reada_defrag(root, btrfs_buffer_node(cur)); + reada_defrag(root, cur); - if (btrfs_header_level(btrfs_buffer_header(cur)) != *level) + if (btrfs_header_level(cur) != *level) WARN_ON(1); if (path->slots[*level] >= - btrfs_header_nritems(btrfs_buffer_header(cur))) + btrfs_header_nritems(cur)) break; if (*level == 1) { @@ -80,14 +80,13 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans, break; } - blocknr = btrfs_node_blockptr(btrfs_buffer_node(cur), - path->slots[*level]); + blocknr = btrfs_node_blockptr(cur, path->slots[*level]); if (cache_only) { next = btrfs_find_tree_block(root, blocknr); - if (!next || !buffer_uptodate(next) || - buffer_locked(next) || !buffer_defrag(next)) { - brelse(next); + /* FIXME, test for defrag */ + if (!next || !btrfs_buffer_uptodate(next)) { + free_extent_buffer(next); path->slots[*level]++; continue; } @@ -106,16 +105,18 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans, WARN_ON(*level <= 0); if (path->nodes[*level-1]) - btrfs_block_release(root, path->nodes[*level-1]); + free_extent_buffer(path->nodes[*level-1]); path->nodes[*level-1] = next; - *level = btrfs_header_level(btrfs_buffer_header(next)); + *level = btrfs_header_level(next); path->slots[*level] = 0; } WARN_ON(*level < 0); WARN_ON(*level >= BTRFS_MAX_LEVEL); +#if 0 clear_buffer_defrag(path->nodes[*level]); clear_buffer_defrag_done(path->nodes[*level]); - btrfs_block_release(root, path->nodes[*level]); +#endif + free_extent_buffer(path->nodes[*level]); path->nodes[*level] = NULL; *level += 1; WARN_ON(ret); @@ -129,24 +130,25 @@ static int defrag_walk_up(struct btrfs_trans_handle *trans, { int i; int slot; - struct btrfs_node *node; + struct extent_buffer *node; for(i = *level; i < BTRFS_MAX_LEVEL - 1 && path->nodes[i]; i++) { slot = path->slots[i]; - if (slot < btrfs_header_nritems( - btrfs_buffer_header(path->nodes[i])) - 1) { + if (slot < btrfs_header_nritems(path->nodes[i]) - 1) { path->slots[i]++; *level = i; - node = btrfs_buffer_node(path->nodes[i]); + node = path->nodes[i]; WARN_ON(i == 0); - btrfs_disk_key_to_cpu(&root->defrag_progress, - &node->ptrs[path->slots[i]].key); + btrfs_node_key_to_cpu(node, &root->defrag_progress, + path->slots[i]); root->defrag_level = i; return 0; } else { + /* clear_buffer_defrag(path->nodes[*level]); clear_buffer_defrag_done(path->nodes[*level]); - btrfs_block_release(root, path->nodes[*level]); + */ + free_extent_buffer(path->nodes[*level]); path->nodes[*level] = NULL; *level = i + 1; } @@ -158,7 +160,7 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, struct btrfs_root *root, int cache_only) { struct btrfs_path *path = NULL; - struct buffer_head *tmp; + struct extent_buffer *tmp; int ret = 0; int wret; int level; @@ -172,17 +174,18 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, if (root->ref_cows == 0 && !is_extent) goto out; + path = btrfs_alloc_path(); if (!path) return -ENOMEM; - level = btrfs_header_level(btrfs_buffer_header(root->node)); + level = btrfs_header_level(root->node); orig_level = level; if (level == 0) { goto out; } if (root->defrag_progress.objectid == 0) { - get_bh(root->node); + extent_buffer_get(root->node); ret = btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp); BUG_ON(ret); ret = btrfs_realloc_node(trans, root, root->node, cache_only, @@ -200,12 +203,15 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, if (is_extent) btrfs_extent_post_op(trans, root); + if (wret < 0) { ret = wret; goto out; } + while(level > 0 && !path->nodes[level]) level--; + if (!path->nodes[level]) { ret = 0; goto out; @@ -230,7 +236,7 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, } for (i = 0; i <= orig_level; i++) { if (path->nodes[i]) { - btrfs_block_release(root, path->nodes[i]); + free_extent_buffer(path->nodes[i]); path->nodes[i] = 0; } }