#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/quotaops.h>
+#include <linux/sort.h>
#define MLOG_MASK_PREFIX ML_NAMEI
#include <cluster/masklog.h>
#include "namei.h"
#include "suballoc.h"
#include "super.h"
+#include "sysfile.h"
#include "uptodate.h"
#include "buffer_head_io.h"
DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
};
-static int ocfs2_extend_dir(struct ocfs2_super *osb,
- struct inode *dir,
- struct buffer_head *parent_fe_bh,
- unsigned int blocks_wanted,
- struct buffer_head **new_de_bh);
static int ocfs2_do_extend_dir(struct super_block *sb,
handle_t *handle,
struct inode *dir,
void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res)
{
brelse(res->dl_leaf_bh);
+ brelse(res->dl_dx_leaf_bh);
+}
+
+static int ocfs2_dir_indexed(struct inode *inode)
+{
+ if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INDEXED_DIR_FL)
+ return 1;
+ return 0;
+}
+
+/*
+ * Hashing code adapted from ext3
+ */
+#define DELTA 0x9E3779B9
+
+static void TEA_transform(__u32 buf[4], __u32 const in[])
+{
+ __u32 sum = 0;
+ __u32 b0 = buf[0], b1 = buf[1];
+ __u32 a = in[0], b = in[1], c = in[2], d = in[3];
+ int n = 16;
+
+ do {
+ sum += DELTA;
+ b0 += ((b1 << 4)+a) ^ (b1+sum) ^ ((b1 >> 5)+b);
+ b1 += ((b0 << 4)+c) ^ (b0+sum) ^ ((b0 >> 5)+d);
+ } while (--n);
+
+ buf[0] += b0;
+ buf[1] += b1;
+}
+
+static void str2hashbuf(const char *msg, int len, __u32 *buf, int num)
+{
+ __u32 pad, val;
+ int i;
+
+ pad = (__u32)len | ((__u32)len << 8);
+ pad |= pad << 16;
+
+ val = pad;
+ if (len > num*4)
+ len = num * 4;
+ for (i = 0; i < len; i++) {
+ if ((i % 4) == 0)
+ val = pad;
+ val = msg[i] + (val << 8);
+ if ((i % 4) == 3) {
+ *buf++ = val;
+ val = pad;
+ num--;
+ }
+ }
+ if (--num >= 0)
+ *buf++ = val;
+ while (--num >= 0)
+ *buf++ = pad;
+}
+
+static void ocfs2_dx_dir_name_hash(struct inode *dir, const char *name, int len,
+ struct ocfs2_dx_hinfo *hinfo)
+{
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+ const char *p;
+ __u32 in[8], buf[4];
+
+ /*
+ * XXX: Is this really necessary, if the index is never looked
+ * at by readdir? Is a hash value of '0' a bad idea?
+ */
+ if ((len == 1 && !strncmp(".", name, 1)) ||
+ (len == 2 && !strncmp("..", name, 2))) {
+ buf[0] = buf[1] = 0;
+ goto out;
+ }
+
+#ifdef OCFS2_DEBUG_DX_DIRS
+ /*
+ * This makes it very easy to debug indexing problems. We
+ * should never allow this to be selected without hand editing
+ * this file though.
+ */
+ buf[0] = buf[1] = len;
+ goto out;
+#endif
+
+ memcpy(buf, osb->osb_dx_seed, sizeof(buf));
+
+ p = name;
+ while (len > 0) {
+ str2hashbuf(p, len, in, 4);
+ TEA_transform(buf, in);
+ len -= 16;
+ p += 16;
+ }
+
+out:
+ hinfo->major_hash = buf[0];
+ hinfo->minor_hash = buf[1];
}
/*
return rc;
}
+/*
+ * Validate a directory trailer.
+ *
+ * We check the trailer here rather than in ocfs2_validate_dir_block()
+ * because that function doesn't have the inode to test.
+ */
+static int ocfs2_check_dir_trailer(struct inode *dir, struct buffer_head *bh)
+{
+ int rc = 0;
+ struct ocfs2_dir_block_trailer *trailer;
+
+ trailer = ocfs2_trailer_from_bh(bh, dir->i_sb);
+ if (!OCFS2_IS_VALID_DIR_TRAILER(trailer)) {
+ rc = -EINVAL;
+ ocfs2_error(dir->i_sb,
+ "Invalid dirblock #%llu: "
+ "signature = %.*s\n",
+ (unsigned long long)bh->b_blocknr, 7,
+ trailer->db_signature);
+ goto out;
+ }
+ if (le64_to_cpu(trailer->db_blkno) != bh->b_blocknr) {
+ rc = -EINVAL;
+ ocfs2_error(dir->i_sb,
+ "Directory block #%llu has an invalid "
+ "db_blkno of %llu",
+ (unsigned long long)bh->b_blocknr,
+ (unsigned long long)le64_to_cpu(trailer->db_blkno));
+ goto out;
+ }
+ if (le64_to_cpu(trailer->db_parent_dinode) !=
+ OCFS2_I(dir)->ip_blkno) {
+ rc = -EINVAL;
+ ocfs2_error(dir->i_sb,
+ "Directory block #%llu on dinode "
+ "#%llu has an invalid parent_dinode "
+ "of %llu",
+ (unsigned long long)bh->b_blocknr,
+ (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ (unsigned long long)le64_to_cpu(trailer->db_blkno));
+ goto out;
+ }
+out:
+ return rc;
+}
+
/*
* This function forces all errors to -EIO for consistency with its
* predecessor, ocfs2_bread(). We haven't audited what returning the
{
int rc = 0;
struct buffer_head *tmp = *bh;
- struct ocfs2_dir_block_trailer *trailer;
rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, flags,
ocfs2_validate_dir_block);
goto out;
}
- /*
- * We check the trailer here rather than in
- * ocfs2_validate_dir_block() because that function doesn't have
- * the inode to test.
- */
if (!(flags & OCFS2_BH_READAHEAD) &&
ocfs2_dir_has_trailer(inode)) {
- trailer = ocfs2_trailer_from_bh(tmp, inode->i_sb);
- if (!OCFS2_IS_VALID_DIR_TRAILER(trailer)) {
- rc = -EINVAL;
- ocfs2_error(inode->i_sb,
- "Invalid dirblock #%llu: "
- "signature = %.*s\n",
- (unsigned long long)tmp->b_blocknr, 7,
- trailer->db_signature);
- goto out;
- }
- if (le64_to_cpu(trailer->db_blkno) != tmp->b_blocknr) {
- rc = -EINVAL;
- ocfs2_error(inode->i_sb,
- "Directory block #%llu has an invalid "
- "db_blkno of %llu",
- (unsigned long long)tmp->b_blocknr,
- (unsigned long long)le64_to_cpu(trailer->db_blkno));
- goto out;
- }
- if (le64_to_cpu(trailer->db_parent_dinode) !=
- OCFS2_I(inode)->ip_blkno) {
- rc = -EINVAL;
- ocfs2_error(inode->i_sb,
- "Directory block #%llu on dinode "
- "#%llu has an invalid parent_dinode "
- "of %llu",
- (unsigned long long)tmp->b_blocknr,
- (unsigned long long)OCFS2_I(inode)->ip_blkno,
- (unsigned long long)le64_to_cpu(trailer->db_blkno));
+ rc = ocfs2_check_dir_trailer(inode, tmp);
+ if (rc) {
+ if (!*bh)
+ brelse(tmp);
+ mlog_errno(rc);
goto out;
}
}
return rc ? -EIO : 0;
}
+/*
+ * Read the block at 'phys' which belongs to this directory
+ * inode. This function does no virtual->physical block translation -
+ * what's passed in is assumed to be a valid directory block.
+ */
+static int ocfs2_read_dir_block_direct(struct inode *dir, u64 phys,
+ struct buffer_head **bh)
+{
+ int ret;
+ struct buffer_head *tmp = *bh;
+
+ ret = ocfs2_read_block(dir, phys, &tmp, ocfs2_validate_dir_block);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (ocfs2_supports_dir_trailer(dir)) {
+ ret = ocfs2_check_dir_trailer(dir, tmp);
+ if (ret) {
+ if (!*bh)
+ brelse(tmp);
+ mlog_errno(ret);
+ goto out;
+ }
+ }
+
+ if (!ret && !*bh)
+ *bh = tmp;
+out:
+ return ret;
+}
+
+static int ocfs2_validate_dx_root(struct super_block *sb,
+ struct buffer_head *bh)
+{
+ int ret;
+ struct ocfs2_dx_root_block *dx_root;
+
+ BUG_ON(!buffer_uptodate(bh));
+
+ dx_root = (struct ocfs2_dx_root_block *) bh->b_data;
+
+ ret = ocfs2_validate_meta_ecc(sb, bh->b_data, &dx_root->dr_check);
+ if (ret) {
+ mlog(ML_ERROR,
+ "Checksum failed for dir index root block %llu\n",
+ (unsigned long long)bh->b_blocknr);
+ return ret;
+ }
+
+ if (!OCFS2_IS_VALID_DX_ROOT(dx_root)) {
+ ocfs2_error(sb,
+ "Dir Index Root # %llu has bad signature %.*s",
+ (unsigned long long)le64_to_cpu(dx_root->dr_blkno),
+ 7, dx_root->dr_signature);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ocfs2_read_dx_root(struct inode *dir, struct ocfs2_dinode *di,
+ struct buffer_head **dx_root_bh)
+{
+ int ret;
+ u64 blkno = le64_to_cpu(di->i_dx_root);
+ struct buffer_head *tmp = *dx_root_bh;
+
+ ret = ocfs2_read_block(dir, blkno, &tmp, ocfs2_validate_dx_root);
+
+ /* If ocfs2_read_block() got us a new bh, pass it up. */
+ if (!ret && !*dx_root_bh)
+ *dx_root_bh = tmp;
+
+ return ret;
+}
+
+static int ocfs2_validate_dx_leaf(struct super_block *sb,
+ struct buffer_head *bh)
+{
+ int ret;
+ struct ocfs2_dx_leaf *dx_leaf = (struct ocfs2_dx_leaf *)bh->b_data;
+
+ BUG_ON(!buffer_uptodate(bh));
+
+ ret = ocfs2_validate_meta_ecc(sb, bh->b_data, &dx_leaf->dl_check);
+ if (ret) {
+ mlog(ML_ERROR,
+ "Checksum failed for dir index leaf block %llu\n",
+ (unsigned long long)bh->b_blocknr);
+ return ret;
+ }
+
+ if (!OCFS2_IS_VALID_DX_LEAF(dx_leaf)) {
+ ocfs2_error(sb, "Dir Index Leaf has bad signature %.*s",
+ 7, dx_leaf->dl_signature);
+ return -EROFS;
+ }
+
+ return 0;
+}
+
+static int ocfs2_read_dx_leaf(struct inode *dir, u64 blkno,
+ struct buffer_head **dx_leaf_bh)
+{
+ int ret;
+ struct buffer_head *tmp = *dx_leaf_bh;
+
+ ret = ocfs2_read_block(dir, blkno, &tmp, ocfs2_validate_dx_leaf);
+
+ /* If ocfs2_read_block() got us a new bh, pass it up. */
+ if (!ret && !*dx_leaf_bh)
+ *dx_leaf_bh = tmp;
+
+ return ret;
+}
+
+/*
+ * Read a series of dx_leaf blocks. This expects all buffer_head
+ * pointers to be NULL on function entry.
+ */
+static int ocfs2_read_dx_leaves(struct inode *dir, u64 start, int num,
+ struct buffer_head **dx_leaf_bhs)
+{
+ int ret;
+
+ ret = ocfs2_read_blocks(dir, start, num, dx_leaf_bhs, 0,
+ ocfs2_validate_dx_leaf);
+ if (ret)
+ mlog_errno(ret);
+
+ return ret;
+}
+
static struct buffer_head *ocfs2_find_entry_el(const char *name, int namelen,
struct inode *dir,
struct ocfs2_dir_entry **res_dir)
return ret;
}
-/*
- * Try to find an entry of the provided name within 'dir'.
- *
- * If nothing was found, -ENOENT is returned. Otherwise, zero is
- * returned and the struct 'res' will contain information useful to
- * other directory manipulation functions.
- *
- * Caller can NOT assume anything about the contents of the
- * buffer_heads - they are passed back only so that it can be passed into
- * any one of the manipulation functions (add entry, delete entry,
- * etc). As an example, bh in the extent directory case is a data
- * block, in the inline-data case it actually points to an inode.
- */
-int ocfs2_find_entry(const char *name, int namelen,
- struct inode *dir, struct ocfs2_dir_lookup_result *lookup)
+static int ocfs2_dx_dir_lookup_rec(struct inode *inode,
+ struct ocfs2_extent_list *el,
+ u32 major_hash,
+ u32 *ret_cpos,
+ u64 *ret_phys_blkno,
+ unsigned int *ret_clen)
{
- struct buffer_head *bh;
- struct ocfs2_dir_entry *res_dir = NULL;
+ int ret = 0, i, found;
+ struct buffer_head *eb_bh = NULL;
+ struct ocfs2_extent_block *eb;
+ struct ocfs2_extent_rec *rec = NULL;
- if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
- bh = ocfs2_find_entry_id(name, namelen, dir, &res_dir);
- else
- bh = ocfs2_find_entry_el(name, namelen, dir, &res_dir);
+ if (el->l_tree_depth) {
+ ret = ocfs2_find_leaf(inode, el, major_hash, &eb_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
- if (bh == NULL)
- return -ENOENT;
+ eb = (struct ocfs2_extent_block *) eb_bh->b_data;
+ el = &eb->h_list;
- lookup->dl_leaf_bh = bh;
- lookup->dl_entry = res_dir;
- return 0;
+ if (el->l_tree_depth) {
+ ocfs2_error(inode->i_sb,
+ "Inode %lu has non zero tree depth in "
+ "btree tree block %llu\n", inode->i_ino,
+ (unsigned long long)eb_bh->b_blocknr);
+ ret = -EROFS;
+ goto out;
+ }
+ }
+
+ found = 0;
+ for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
+ rec = &el->l_recs[i];
+
+ if (le32_to_cpu(rec->e_cpos) <= major_hash) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ ocfs2_error(inode->i_sb, "Inode %lu has bad extent "
+ "record (%u, %u, 0) in btree", inode->i_ino,
+ le32_to_cpu(rec->e_cpos),
+ ocfs2_rec_clusters(el, rec));
+ ret = -EROFS;
+ goto out;
+ }
+
+ if (ret_phys_blkno)
+ *ret_phys_blkno = le64_to_cpu(rec->e_blkno);
+ if (ret_cpos)
+ *ret_cpos = le32_to_cpu(rec->e_cpos);
+ if (ret_clen)
+ *ret_clen = le16_to_cpu(rec->e_leaf_clusters);
+
+out:
+ brelse(eb_bh);
+ return ret;
}
/*
- * Update inode number and type of a previously found directory entry.
+ * Returns the block index, from the start of the cluster which this
+ * hash belongs too.
*/
-int ocfs2_update_entry(struct inode *dir, handle_t *handle,
- struct ocfs2_dir_lookup_result *res,
- struct inode *new_entry_inode)
+static unsigned int ocfs2_dx_dir_hash_idx(struct ocfs2_super *osb,
+ struct ocfs2_dx_hinfo *hinfo)
{
- int ret;
- ocfs2_journal_access_func access = ocfs2_journal_access_db;
- struct ocfs2_dir_entry *de = res->dl_entry;
- struct buffer_head *de_bh = res->dl_leaf_bh;
-
- /*
- * The same code works fine for both inline-data and extent
- * based directories, so no need to split this up. The only
- * difference is the journal_access function.
- */
+ u32 minor_hash = hinfo->minor_hash;
+ return minor_hash & osb->osb_dx_mask;
+}
- if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
- access = ocfs2_journal_access_di;
+static int ocfs2_dx_dir_lookup(struct inode *inode,
+ struct ocfs2_extent_list *el,
+ struct ocfs2_dx_hinfo *hinfo,
+ u32 *ret_cpos,
+ u64 *ret_phys_blkno)
+{
+ int ret = 0;
+ unsigned int cend, uninitialized_var(clen);
+ u32 uninitialized_var(cpos);
+ u64 uninitialized_var(blkno);
+ u32 name_hash = hinfo->major_hash;
- ret = access(handle, dir, de_bh, OCFS2_JOURNAL_ACCESS_WRITE);
+ ret = ocfs2_dx_dir_lookup_rec(inode, el, name_hash, &cpos, &blkno,
+ &clen);
if (ret) {
mlog_errno(ret);
goto out;
}
- de->inode = cpu_to_le64(OCFS2_I(new_entry_inode)->ip_blkno);
- ocfs2_set_de_type(de, new_entry_inode->i_mode);
+ cend = cpos + clen;
+ if (name_hash >= cend) {
+ /* We want the last cluster */
+ blkno += ocfs2_clusters_to_blocks(inode->i_sb, clen - 1);
+ cpos += clen - 1;
+ } else {
+ blkno += ocfs2_clusters_to_blocks(inode->i_sb,
+ name_hash - cpos);
+ cpos = name_hash;
+ }
- ocfs2_journal_dirty(handle, de_bh);
+ /*
+ * We now have the cluster which should hold our entry. To
+ * find the exact block from the start of the cluster to
+ * search, we take the lower bits of the hash.
+ */
+ blkno += ocfs2_dx_dir_hash_idx(OCFS2_SB(inode->i_sb), hinfo);
+
+ if (ret_phys_blkno)
+ *ret_phys_blkno = blkno;
+ if (ret_cpos)
+ *ret_cpos = cpos;
out:
+
return ret;
}
-static int __ocfs2_delete_entry(handle_t *handle, struct inode *dir,
- struct ocfs2_dir_entry *de_del,
- struct buffer_head *bh, char *first_de,
- unsigned int bytes)
+static int ocfs2_dx_dir_search(const char *name, int namelen,
+ struct inode *dir,
+ struct ocfs2_extent_list *dr_el,
+ struct ocfs2_dir_lookup_result *res)
{
- struct ocfs2_dir_entry *de, *pde;
- int i, status = -ENOENT;
- ocfs2_journal_access_func access = ocfs2_journal_access_db;
+ int ret, i, found;
+ u64 uninitialized_var(phys);
+ struct buffer_head *dx_leaf_bh = NULL;
+ struct ocfs2_dx_leaf *dx_leaf;
+ struct ocfs2_dx_entry *dx_entry = NULL;
+ struct buffer_head *dir_ent_bh = NULL;
+ struct ocfs2_dir_entry *dir_ent = NULL;
+ struct ocfs2_dx_hinfo *hinfo = &res->dl_hinfo;
+
+ ocfs2_dx_dir_name_hash(dir, name, namelen, &res->dl_hinfo);
+
+ ret = ocfs2_dx_dir_lookup(dir, dr_el, hinfo, NULL, &phys);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
- mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh);
+ mlog(0, "Dir %llu: name: \"%.*s\", lookup of hash: %u.0x%x "
+ "returns: %llu\n",
+ (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ namelen, name, hinfo->major_hash, hinfo->minor_hash,
+ (unsigned long long)phys);
- if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
- access = ocfs2_journal_access_di;
+ ret = ocfs2_read_dx_leaf(dir, phys, &dx_leaf_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
- i = 0;
- pde = NULL;
- de = (struct ocfs2_dir_entry *) first_de;
- while (i < bytes) {
- if (!ocfs2_check_dir_entry(dir, de, bh, i)) {
- status = -EIO;
- mlog_errno(status);
- goto bail;
+ dx_leaf = (struct ocfs2_dx_leaf *) dx_leaf_bh->b_data;
+
+ mlog(0, "leaf info: num_used: %d, count: %d\n",
+ le16_to_cpu(dx_leaf->dl_list.de_num_used),
+ le16_to_cpu(dx_leaf->dl_list.de_count));
+
+ /*
+ * Empty leaf is legal, so no need to check for that.
+ */
+ found = 0;
+ for (i = 0; i < le16_to_cpu(dx_leaf->dl_list.de_num_used); i++) {
+ dx_entry = &dx_leaf->dl_list.de_entries[i];
+
+ if (hinfo->major_hash != le32_to_cpu(dx_entry->dx_major_hash)
+ || hinfo->minor_hash != le32_to_cpu(dx_entry->dx_minor_hash))
+ continue;
+
+ /*
+ * Search unindexed leaf block now. We're not
+ * guaranteed to find anything.
+ */
+ ret = ocfs2_read_dir_block_direct(dir,
+ le64_to_cpu(dx_entry->dx_dirent_blk),
+ &dir_ent_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
}
- if (de == de_del) {
- status = access(handle, dir, bh,
+
+ /*
+ * XXX: We should check the unindexed block here,
+ * before using it.
+ */
+
+ found = ocfs2_search_dirblock(dir_ent_bh, dir, name, namelen,
+ 0, dir_ent_bh->b_data,
+ dir->i_sb->s_blocksize, &dir_ent);
+ if (found == 1)
+ break;
+
+ if (found == -1) {
+ /* This means we found a bad directory entry. */
+ ret = -EIO;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ brelse(dir_ent_bh);
+ dir_ent_bh = NULL;
+ }
+
+ if (found <= 0) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ res->dl_leaf_bh = dir_ent_bh;
+ res->dl_entry = dir_ent;
+ res->dl_dx_leaf_bh = dx_leaf_bh;
+ res->dl_dx_entry = dx_entry;
+
+ ret = 0;
+out:
+ if (ret) {
+ brelse(dx_leaf_bh);
+ brelse(dir_ent_bh);
+ }
+ return ret;
+}
+
+static int ocfs2_find_entry_dx(const char *name, int namelen,
+ struct inode *dir,
+ struct ocfs2_dir_lookup_result *lookup)
+{
+ int ret;
+ struct buffer_head *di_bh = NULL;
+ struct ocfs2_dinode *di;
+ struct buffer_head *dx_root_bh = NULL;
+ struct ocfs2_dx_root_block *dx_root;
+
+ ret = ocfs2_read_inode_block(dir, &di_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ di = (struct ocfs2_dinode *)di_bh->b_data;
+
+ ret = ocfs2_read_dx_root(dir, di, &dx_root_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data;
+
+ ret = ocfs2_dx_dir_search(name, namelen, dir, &dx_root->dr_list,
+ lookup);
+ if (ret) {
+ if (ret != -ENOENT)
+ mlog_errno(ret);
+ goto out;
+ }
+
+out:
+ brelse(di_bh);
+ brelse(dx_root_bh);
+ return ret;
+}
+
+/*
+ * Try to find an entry of the provided name within 'dir'.
+ *
+ * If nothing was found, -ENOENT is returned. Otherwise, zero is
+ * returned and the struct 'res' will contain information useful to
+ * other directory manipulation functions.
+ *
+ * Caller can NOT assume anything about the contents of the
+ * buffer_heads - they are passed back only so that it can be passed
+ * into any one of the manipulation functions (add entry, delete
+ * entry, etc). As an example, bh in the extent directory case is a
+ * data block, in the inline-data case it actually points to an inode,
+ * in the indexed directory case, multiple buffers are involved.
+ */
+int ocfs2_find_entry(const char *name, int namelen,
+ struct inode *dir, struct ocfs2_dir_lookup_result *lookup)
+{
+ struct buffer_head *bh;
+ struct ocfs2_dir_entry *res_dir = NULL;
+
+ if (ocfs2_dir_indexed(dir))
+ return ocfs2_find_entry_dx(name, namelen, dir, lookup);
+
+ /*
+ * The unindexed dir code only uses part of the lookup
+ * structure, so there's no reason to push it down further
+ * than this.
+ */
+ if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
+ bh = ocfs2_find_entry_id(name, namelen, dir, &res_dir);
+ else
+ bh = ocfs2_find_entry_el(name, namelen, dir, &res_dir);
+
+ if (bh == NULL)
+ return -ENOENT;
+
+ lookup->dl_leaf_bh = bh;
+ lookup->dl_entry = res_dir;
+ return 0;
+}
+
+/*
+ * Update inode number and type of a previously found directory entry.
+ */
+int ocfs2_update_entry(struct inode *dir, handle_t *handle,
+ struct ocfs2_dir_lookup_result *res,
+ struct inode *new_entry_inode)
+{
+ int ret;
+ ocfs2_journal_access_func access = ocfs2_journal_access_db;
+ struct ocfs2_dir_entry *de = res->dl_entry;
+ struct buffer_head *de_bh = res->dl_leaf_bh;
+
+ /*
+ * The same code works fine for both inline-data and extent
+ * based directories, so no need to split this up. The only
+ * difference is the journal_access function.
+ */
+
+ if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
+ access = ocfs2_journal_access_di;
+
+ ret = access(handle, dir, de_bh, OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ de->inode = cpu_to_le64(OCFS2_I(new_entry_inode)->ip_blkno);
+ ocfs2_set_de_type(de, new_entry_inode->i_mode);
+
+ ocfs2_journal_dirty(handle, de_bh);
+
+out:
+ return ret;
+}
+
+/*
+ * __ocfs2_delete_entry deletes a directory entry by merging it with the
+ * previous entry
+ */
+static int __ocfs2_delete_entry(handle_t *handle, struct inode *dir,
+ struct ocfs2_dir_entry *de_del,
+ struct buffer_head *bh, char *first_de,
+ unsigned int bytes)
+{
+ struct ocfs2_dir_entry *de, *pde;
+ int i, status = -ENOENT;
+ ocfs2_journal_access_func access = ocfs2_journal_access_db;
+
+ mlog_entry("(0x%p, 0x%p, 0x%p, 0x%p)\n", handle, dir, de_del, bh);
+
+ if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
+ access = ocfs2_journal_access_di;
+
+ i = 0;
+ pde = NULL;
+ de = (struct ocfs2_dir_entry *) first_de;
+ while (i < bytes) {
+ if (!ocfs2_check_dir_entry(dir, de, bh, i)) {
+ status = -EIO;
+ mlog_errno(status);
+ goto bail;
+ }
+ if (de == de_del) {
+ status = access(handle, dir, bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
status = -EIO;
return status;
}
+static void ocfs2_dx_leaf_remove_entry(struct ocfs2_dx_leaf *dx_leaf, int index)
+{
+ struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list;
+ int num_used = le16_to_cpu(dl_list->de_num_used);
+
+ if (num_used == 1 || index == (num_used - 1))
+ goto clear;
+
+ memmove(&dl_list->de_entries[index], &dl_list->de_entries[index + 1],
+ (num_used - index - 1)*sizeof(struct ocfs2_dx_entry));
+clear:
+ num_used--;
+ memset(&dl_list->de_entries[num_used], 0,
+ sizeof(struct ocfs2_dx_entry));
+ dl_list->de_num_used = cpu_to_le16(num_used);
+}
+
+static int ocfs2_delete_entry_dx(handle_t *handle, struct inode *dir,
+ struct ocfs2_dir_lookup_result *lookup)
+{
+ int ret, index;
+ struct buffer_head *leaf_bh = lookup->dl_leaf_bh;
+ struct ocfs2_dx_leaf *dx_leaf;
+ struct ocfs2_dx_entry *dx_entry = lookup->dl_dx_entry;
+
+ dx_leaf = (struct ocfs2_dx_leaf *) lookup->dl_dx_leaf_bh->b_data;
+ /* Neither of these are a disk corruption - that should have
+ * been caught by lookup, before we got here. */
+ BUG_ON(le16_to_cpu(dx_leaf->dl_list.de_count) <= 0);
+ BUG_ON(le16_to_cpu(dx_leaf->dl_list.de_num_used) <= 0);
+
+ index = (char *)dx_entry - (char *)dx_leaf->dl_list.de_entries;
+ index /= sizeof(*dx_entry);
+
+ if (index >= le16_to_cpu(dx_leaf->dl_list.de_num_used)) {
+ mlog(ML_ERROR, "Dir %llu: Bad dx_entry ptr idx %d, (%p, %p)\n",
+ (unsigned long long)OCFS2_I(dir)->ip_blkno, index, dx_leaf,
+ dx_entry);
+ return -EIO;
+ }
+
+ mlog(0, "Dir %llu: delete entry at index: %d\n",
+ (unsigned long long)OCFS2_I(dir)->ip_blkno, index);
+
+ /*
+ * Add the index leaf into the journal before removing the
+ * unindexed entry. If we get an error return from
+ * __ocfs2_delete_entry(), then it hasn't removed the entry
+ * yet. Likewise, successful return means we *must* remove the
+ * indexed entry.
+ */
+ ret = ocfs2_journal_access_dl(handle, dir, lookup->dl_dx_leaf_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = __ocfs2_delete_entry(handle, dir, lookup->dl_entry,
+ leaf_bh, leaf_bh->b_data, leaf_bh->b_size);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ocfs2_dx_leaf_remove_entry(dx_leaf, index);
+
+ ocfs2_journal_dirty(handle, lookup->dl_dx_leaf_bh);
+
+out:
+ return ret;
+}
+
static inline int ocfs2_delete_entry_id(handle_t *handle,
struct inode *dir,
struct ocfs2_dir_entry *de_del,
}
/*
- * ocfs2_delete_entry deletes a directory entry by merging it with the
- * previous entry
+ * Delete a directory entry. Hide the details of directory
+ * implementation from the caller.
*/
int ocfs2_delete_entry(handle_t *handle,
struct inode *dir,
struct ocfs2_dir_lookup_result *res)
{
+ if (ocfs2_dir_indexed(dir))
+ return ocfs2_delete_entry_dx(handle, dir, res);
+
if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
return ocfs2_delete_entry_id(handle, dir, res->dl_entry,
res->dl_leaf_bh);
return 0;
}
+static void ocfs2_dx_dir_leaf_insert_tail(struct ocfs2_dx_leaf *dx_leaf,
+ struct ocfs2_dx_entry *dx_new_entry)
+{
+ int i;
+
+ i = le16_to_cpu(dx_leaf->dl_list.de_num_used);
+ dx_leaf->dl_list.de_entries[i] = *dx_new_entry;
+
+ le16_add_cpu(&dx_leaf->dl_list.de_num_used, 1);
+}
+
+static int __ocfs2_dx_dir_leaf_insert(struct inode *dir, handle_t *handle,
+ struct ocfs2_dx_hinfo *hinfo,
+ u64 dirent_blk,
+ struct buffer_head *dx_leaf_bh)
+{
+ int ret, i;
+ struct ocfs2_dx_entry *dx_entry;
+ struct ocfs2_dx_leaf *dx_leaf;
+
+ ret = ocfs2_journal_access_dl(handle, dir, dx_leaf_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ dx_leaf = (struct ocfs2_dx_leaf *)dx_leaf_bh->b_data;
+ i = le16_to_cpu(dx_leaf->dl_list.de_num_used);
+ dx_entry = &dx_leaf->dl_list.de_entries[i];
+
+ memset(dx_entry, 0, sizeof(*dx_entry));
+ dx_entry->dx_major_hash = cpu_to_le32(hinfo->major_hash);
+ dx_entry->dx_minor_hash = cpu_to_le32(hinfo->minor_hash);
+ dx_entry->dx_dirent_blk = cpu_to_le64(dirent_blk);
+
+ le16_add_cpu(&dx_leaf->dl_list.de_num_used, 1);
+
+ ocfs2_journal_dirty(handle, dx_leaf_bh);
+
+out:
+ return ret;
+}
+
+static int ocfs2_dx_dir_leaf_insert(struct inode *dir, handle_t *handle,
+ struct ocfs2_dir_lookup_result *lookup)
+{
+ return __ocfs2_dx_dir_leaf_insert(dir, handle, &lookup->dl_hinfo,
+ lookup->dl_leaf_bh->b_blocknr,
+ lookup->dl_dx_leaf_bh);
+}
+
/* we don't always have a dentry for what we want to add, so people
* like orphan dir can call this instead.
*
status = ocfs2_journal_access_di(handle, dir,
insert_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
- else
+ else {
status = ocfs2_journal_access_db(handle, dir,
insert_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ocfs2_dir_indexed(dir)) {
+ status = ocfs2_dx_dir_leaf_insert(dir,
+ handle,
+ lookup);
+ if (status) {
+ mlog_errno(status);
+ goto bail;
+ }
+ }
+ }
+
/* By now the buffer is marked for journaling */
offset += le16_to_cpu(de->rec_len);
if (le64_to_cpu(de->inode)) {
return 0;
}
+/*
+ * NOTE: This function can be called against unindexed directories,
+ * and indexed ones.
+ */
static int ocfs2_dir_foreach_blk_el(struct inode *inode,
u64 *f_version,
loff_t *f_pos, void *priv,
* routine to check that the specified directory is empty (for rmdir)
*
* Returns 1 if dir is empty, zero otherwise.
+ *
+ * XXX: This is a performance problem
*/
int ocfs2_empty_dir(struct inode *inode)
{
struct inode *parent,
struct inode *inode,
struct buffer_head *fe_bh,
- struct ocfs2_alloc_context *data_ac)
+ struct ocfs2_alloc_context *data_ac,
+ struct buffer_head **ret_new_bh)
{
int status;
unsigned int size = osb->sb->s_blocksize;
}
status = 0;
+ if (ret_new_bh) {
+ *ret_new_bh = new_bh;
+ new_bh = NULL;
+ }
bail:
brelse(new_bh);
return status;
}
-int ocfs2_fill_new_dir(struct ocfs2_super *osb,
- handle_t *handle,
- struct inode *parent,
- struct inode *inode,
- struct buffer_head *fe_bh,
- struct ocfs2_alloc_context *data_ac)
+static int ocfs2_dx_dir_attach_index(struct ocfs2_super *osb,
+ handle_t *handle, struct inode *dir,
+ struct buffer_head *di_bh,
+ struct ocfs2_alloc_context *meta_ac,
+ struct buffer_head **ret_dx_root_bh)
{
- BUG_ON(!ocfs2_supports_inline_data(osb) && data_ac == NULL);
-
- if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
- return ocfs2_fill_new_dir_id(osb, handle, parent, inode, fe_bh);
+ int ret;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
+ u16 dr_suballoc_bit;
+ u64 dr_blkno;
+ unsigned int num_bits;
+ struct buffer_head *dx_root_bh = NULL;
+ struct ocfs2_dx_root_block *dx_root;
+
+ ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, &dr_suballoc_bit,
+ &num_bits, &dr_blkno);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
- return ocfs2_fill_new_dir_el(osb, handle, parent, inode, fe_bh,
- data_ac);
-}
+ mlog(0, "Dir %llu, attach new index block: %llu\n",
+ (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ (unsigned long long)dr_blkno);
-/*
- * Expand rec_len of the rightmost dirent in a directory block so that it
- * contains the end of our valid space for dirents. We do this during
- * expansion from an inline directory to one with extents. The first dir block
- * in that case is taken from the inline data portion of the inode block.
- *
- * We add the dir trailer if this filesystem wants it.
- */
-static void ocfs2_expand_last_dirent(char *start, unsigned int old_size,
- struct super_block *sb)
-{
- struct ocfs2_dir_entry *de;
- struct ocfs2_dir_entry *prev_de;
- char *de_buf, *limit;
- unsigned int new_size = sb->s_blocksize;
- unsigned int bytes;
+ dx_root_bh = sb_getblk(osb->sb, dr_blkno);
+ if (dx_root_bh == NULL) {
+ ret = -EIO;
+ goto out;
+ }
+ ocfs2_set_new_buffer_uptodate(dir, dx_root_bh);
- if (ocfs2_supports_dir_trailer(OCFS2_SB(sb)))
- new_size = ocfs2_dir_trailer_blk_off(sb);
+ ret = ocfs2_journal_access_dr(handle, dir, dx_root_bh,
+ OCFS2_JOURNAL_ACCESS_CREATE);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
- bytes = new_size - old_size;
+ dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
+ memset(dx_root, 0, osb->sb->s_blocksize);
+ strcpy(dx_root->dr_signature, OCFS2_DX_ROOT_SIGNATURE);
+ dx_root->dr_suballoc_slot = cpu_to_le16(osb->slot_num);
+ dx_root->dr_suballoc_bit = cpu_to_le16(dr_suballoc_bit);
+ dx_root->dr_fs_generation = cpu_to_le32(osb->fs_generation);
+ dx_root->dr_blkno = cpu_to_le64(dr_blkno);
+ dx_root->dr_dir_blkno = cpu_to_le64(OCFS2_I(dir)->ip_blkno);
+ dx_root->dr_list.l_count =
+ cpu_to_le16(ocfs2_extent_recs_per_dx_root(osb->sb));
+
+ ret = ocfs2_journal_dirty(handle, dx_root_bh);
+ if (ret)
+ mlog_errno(ret);
- limit = start + old_size;
- de_buf = start;
- de = (struct ocfs2_dir_entry *)de_buf;
+ ret = ocfs2_journal_access_di(handle, dir, di_bh,
+ OCFS2_JOURNAL_ACCESS_CREATE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ di->i_dx_root = cpu_to_le64(dr_blkno);
+
+ OCFS2_I(dir)->ip_dyn_features |= OCFS2_INDEXED_DIR_FL;
+ di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features);
+
+ ret = ocfs2_journal_dirty(handle, di_bh);
+ if (ret)
+ mlog_errno(ret);
+
+ *ret_dx_root_bh = dx_root_bh;
+ dx_root_bh = NULL;
+
+out:
+ brelse(dx_root_bh);
+ return ret;
+}
+
+static int ocfs2_dx_dir_format_cluster(struct ocfs2_super *osb,
+ handle_t *handle, struct inode *dir,
+ struct buffer_head **dx_leaves,
+ int num_dx_leaves, u64 start_blk)
+{
+ int ret, i;
+ struct ocfs2_dx_leaf *dx_leaf;
+ struct buffer_head *bh;
+
+ for (i = 0; i < num_dx_leaves; i++) {
+ bh = sb_getblk(osb->sb, start_blk + i);
+ if (bh == NULL) {
+ ret = -EIO;
+ goto out;
+ }
+ dx_leaves[i] = bh;
+
+ ocfs2_set_new_buffer_uptodate(dir, bh);
+
+ ret = ocfs2_journal_access_dl(handle, dir, bh,
+ OCFS2_JOURNAL_ACCESS_CREATE);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ dx_leaf = (struct ocfs2_dx_leaf *) bh->b_data;
+
+ memset(dx_leaf, 0, osb->sb->s_blocksize);
+ strcpy(dx_leaf->dl_signature, OCFS2_DX_LEAF_SIGNATURE);
+ dx_leaf->dl_fs_generation = cpu_to_le32(osb->fs_generation);
+ dx_leaf->dl_blkno = cpu_to_le64(bh->b_blocknr);
+ dx_leaf->dl_list.de_count =
+ cpu_to_le16(ocfs2_dx_entries_per_leaf(osb->sb));
+
+ mlog(0,
+ "Dir %llu, format dx_leaf: %llu, entry count: %u\n",
+ (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ (unsigned long long)bh->b_blocknr,
+ le16_to_cpu(dx_leaf->dl_list.de_count));
+
+ ocfs2_journal_dirty(handle, bh);
+ }
+
+ ret = 0;
+out:
+ return ret;
+}
+
+/*
+ * Allocates and formats a new cluster for use in an indexed dir
+ * leaf. This version will not do the extent insert, so that it can be
+ * used by operations which need careful ordering.
+ */
+static int __ocfs2_dx_dir_new_cluster(struct inode *dir,
+ u32 cpos, handle_t *handle,
+ struct ocfs2_alloc_context *data_ac,
+ struct buffer_head **dx_leaves,
+ int num_dx_leaves, u64 *ret_phys_blkno)
+{
+ int ret;
+ u32 phys, num;
+ u64 phys_blkno;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+
+ /*
+ * XXX: For create, this should claim cluster for the index
+ * *before* the unindexed insert so that we have a better
+ * chance of contiguousness as the directory grows in number
+ * of entries.
+ */
+ ret = __ocfs2_claim_clusters(osb, handle, data_ac, 1, 1, &phys, &num);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /*
+ * Format the new cluster first. That way, we're inserting
+ * valid data.
+ */
+ phys_blkno = ocfs2_clusters_to_blocks(osb->sb, phys);
+ ret = ocfs2_dx_dir_format_cluster(osb, handle, dir, dx_leaves,
+ num_dx_leaves, phys_blkno);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ *ret_phys_blkno = phys_blkno;
+out:
+ return ret;
+}
+
+static int ocfs2_dx_dir_new_cluster(struct inode *dir,
+ struct ocfs2_extent_tree *et,
+ u32 cpos, handle_t *handle,
+ struct ocfs2_alloc_context *data_ac,
+ struct ocfs2_alloc_context *meta_ac,
+ struct buffer_head **dx_leaves,
+ int num_dx_leaves)
+{
+ int ret;
+ u64 phys_blkno;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+
+ ret = __ocfs2_dx_dir_new_cluster(dir, cpos, handle, data_ac, dx_leaves,
+ num_dx_leaves, &phys_blkno);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_insert_extent(osb, handle, dir, et, cpos, phys_blkno, 1, 0,
+ meta_ac);
+ if (ret)
+ mlog_errno(ret);
+out:
+ return ret;
+}
+
+static struct buffer_head **ocfs2_dx_dir_kmalloc_leaves(struct super_block *sb,
+ int *ret_num_leaves)
+{
+ int num_dx_leaves = ocfs2_clusters_to_blocks(sb, 1);
+ struct buffer_head **dx_leaves;
+
+ dx_leaves = kcalloc(num_dx_leaves, sizeof(struct buffer_head *),
+ GFP_NOFS);
+ if (dx_leaves && ret_num_leaves)
+ *ret_num_leaves = num_dx_leaves;
+
+ return dx_leaves;
+}
+
+static int ocfs2_fill_new_dir_dx(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *parent,
+ struct inode *inode,
+ struct buffer_head *di_bh,
+ struct ocfs2_alloc_context *data_ac,
+ struct ocfs2_alloc_context *meta_ac)
+{
+ int ret, num_dx_leaves, i;
+ struct buffer_head *leaf_bh = NULL;
+ struct buffer_head *dx_root_bh = NULL;
+ struct buffer_head **dx_leaves = NULL;
+ struct ocfs2_extent_tree et;
+ struct ocfs2_dx_hinfo hinfo;
+ u64 insert_blkno;
+
+ dx_leaves = ocfs2_dx_dir_kmalloc_leaves(osb->sb, &num_dx_leaves);
+ if (!dx_leaves) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /*
+ * Our strategy is to create the directory as though it were
+ * unindexed, then add the index block. This works with very
+ * little complication since the state of a new directory is a
+ * very well known quantity.
+ *
+ * Essentially, we have two dirents ("." and ".."), in the 1st
+ * block which need indexing.
+ */
+
+ ret = ocfs2_fill_new_dir_el(osb, handle, parent, inode, di_bh,
+ data_ac, &leaf_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /*
+ * Allocate and format the index leaf first, before attaching
+ * the index root. That way we're sure that the main bitmap
+ * won't -enospc on us with a half-created dir index.
+ *
+ * The meta data allocation for our index block will not
+ * -enospc on us unless there is a disk corruption.
+ */
+
+ ret = __ocfs2_dx_dir_new_cluster(inode, 0, handle, data_ac, dx_leaves,
+ num_dx_leaves, &insert_blkno);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ocfs2_dx_dir_name_hash(inode, ".", 1, &hinfo);
+ i = ocfs2_dx_dir_hash_idx(osb, &hinfo);
+ ret = __ocfs2_dx_dir_leaf_insert(inode, handle, &hinfo,
+ leaf_bh->b_blocknr, dx_leaves[i]);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ocfs2_dx_dir_name_hash(inode, "..", 2, &hinfo);
+ i = ocfs2_dx_dir_hash_idx(osb, &hinfo);
+ ret = __ocfs2_dx_dir_leaf_insert(inode, handle, &hinfo,
+ leaf_bh->b_blocknr, dx_leaves[i]);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_dx_dir_attach_index(osb, handle, inode, di_bh, meta_ac,
+ &dx_root_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /* This should never fail considering we start with an empty
+ * dx_root. */
+ ocfs2_init_dx_root_extent_tree(&et, inode, dx_root_bh);
+ ret = ocfs2_insert_extent(osb, handle, inode, &et, 0,
+ insert_blkno, 1, 0, NULL);
+ if (ret)
+ mlog_errno(ret);
+
+out:
+ if (dx_leaves) {
+ for (i = 0; i < num_dx_leaves; i++)
+ brelse(dx_leaves[i]);
+ kfree(dx_leaves);
+ }
+ brelse(dx_root_bh);
+ brelse(leaf_bh);
+ return ret;
+}
+
+int ocfs2_fill_new_dir(struct ocfs2_super *osb,
+ handle_t *handle,
+ struct inode *parent,
+ struct inode *inode,
+ struct buffer_head *fe_bh,
+ struct ocfs2_alloc_context *data_ac,
+ struct ocfs2_alloc_context *meta_ac)
+
+{
+ BUG_ON(!ocfs2_supports_inline_data(osb) && data_ac == NULL);
+
+ if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)
+ return ocfs2_fill_new_dir_id(osb, handle, parent, inode, fe_bh);
+
+ if (ocfs2_supports_indexed_dirs(osb))
+ return ocfs2_fill_new_dir_dx(osb, handle, parent, inode, fe_bh,
+ data_ac, meta_ac);
+
+ return ocfs2_fill_new_dir_el(osb, handle, parent, inode, fe_bh,
+ data_ac, NULL);
+}
+
+static int ocfs2_dx_dir_index_block(struct inode *dir,
+ handle_t *handle,
+ struct buffer_head **dx_leaves,
+ int num_dx_leaves,
+ struct buffer_head *dirent_bh)
+{
+ int ret, namelen, i;
+ char *de_buf, *limit;
+ struct ocfs2_dir_entry *de;
+ struct buffer_head *dx_leaf_bh;
+ struct ocfs2_dx_hinfo hinfo;
+ u64 dirent_blk = dirent_bh->b_blocknr;
+
+ de_buf = dirent_bh->b_data;
+ limit = de_buf + dir->i_sb->s_blocksize;
+
+ while (de_buf < limit) {
+ de = (struct ocfs2_dir_entry *)de_buf;
+
+ namelen = de->name_len;
+ if (!namelen || !de->inode)
+ goto inc;
+
+ ocfs2_dx_dir_name_hash(dir, de->name, namelen, &hinfo);
+
+ i = ocfs2_dx_dir_hash_idx(OCFS2_SB(dir->i_sb), &hinfo);
+ dx_leaf_bh = dx_leaves[i];
+
+ ret = __ocfs2_dx_dir_leaf_insert(dir, handle, &hinfo,
+ dirent_blk, dx_leaf_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+inc:
+ de_buf += le16_to_cpu(de->rec_len);
+ }
+
+out:
+ return ret;
+}
+
+/*
+ * Expand rec_len of the rightmost dirent in a directory block so that it
+ * contains the end of our valid space for dirents. We do this during
+ * expansion from an inline directory to one with extents. The first dir block
+ * in that case is taken from the inline data portion of the inode block.
+ *
+ * We add the dir trailer if this filesystem wants it.
+ */
+static void ocfs2_expand_last_dirent(char *start, unsigned int old_size,
+ struct super_block *sb)
+{
+ struct ocfs2_dir_entry *de;
+ struct ocfs2_dir_entry *prev_de;
+ char *de_buf, *limit;
+ unsigned int new_size = sb->s_blocksize;
+ unsigned int bytes;
+
+ if (ocfs2_supports_dir_trailer(OCFS2_SB(sb)))
+ new_size = ocfs2_dir_trailer_blk_off(sb);
+
+ bytes = new_size - old_size;
+
+ limit = start + old_size;
+ de_buf = start;
+ de = (struct ocfs2_dir_entry *)de_buf;
do {
prev_de = de;
de_buf += le16_to_cpu(de->rec_len);
*/
static int ocfs2_expand_inline_dir(struct inode *dir, struct buffer_head *di_bh,
unsigned int blocks_wanted,
+ struct ocfs2_dir_lookup_result *lookup,
struct buffer_head **first_block_bh)
{
- u32 alloc, bit_off, len;
+ u32 alloc, dx_alloc, bit_off, len;
struct super_block *sb = dir->i_sb;
- int ret, credits = ocfs2_inline_to_extents_credits(sb);
- u64 blkno, bytes = blocks_wanted << sb->s_blocksize_bits;
+ int ret, i, num_dx_leaves = 0,
+ credits = ocfs2_inline_to_extents_credits(sb);
+ u64 dx_insert_blkno, blkno,
+ bytes = blocks_wanted << sb->s_blocksize_bits;
struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
struct ocfs2_inode_info *oi = OCFS2_I(dir);
struct ocfs2_alloc_context *data_ac;
+ struct ocfs2_alloc_context *meta_ac = NULL;
struct buffer_head *dirdata_bh = NULL;
+ struct buffer_head *dx_root_bh = NULL;
+ struct buffer_head **dx_leaves = NULL;
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
handle_t *handle;
struct ocfs2_extent_tree et;
- int did_quota = 0;
+ struct ocfs2_extent_tree dx_et;
+ int did_quota = 0, bytes_allocated = 0;
ocfs2_init_dinode_extent_tree(&et, dir, di_bh);
alloc = ocfs2_clusters_for_bytes(sb, bytes);
+ dx_alloc = 0;
+
+ if (ocfs2_supports_indexed_dirs(osb)) {
+ /* Add one more cluster for an index leaf */
+ dx_alloc++;
+ credits += ocfs2_add_dir_index_credits(sb);
+
+ dx_leaves = ocfs2_dx_dir_kmalloc_leaves(sb, &num_dx_leaves);
+ if (!dx_leaves) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /* This gets us the dx_root */
+ ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ }
/*
- * We should never need more than 2 clusters for this -
- * maximum dirent size is far less than one block. In fact,
- * the only time we'd need more than one cluster is if
+ * We should never need more than 2 clusters for the unindexed
+ * tree - maximum dirent size is far less than one block. In
+ * fact, the only time we'd need more than one cluster is if
* blocksize == clustersize and the dirent won't fit in the
* extra space that the expansion to a single block gives. As
* of today, that only happens on 4k/4k file systems.
/*
* Prepare for worst case allocation scenario of two separate
- * extents.
+ * extents in the unindexed tree.
*/
if (alloc == 2)
credits += OCFS2_SUBALLOC_ALLOC;
}
if (vfs_dq_alloc_space_nodirty(dir,
- ocfs2_clusters_to_bytes(osb->sb, alloc))) {
+ ocfs2_clusters_to_bytes(osb->sb,
+ alloc + dx_alloc))) {
ret = -EDQUOT;
goto out_commit;
}
did_quota = 1;
+
+ if (ocfs2_supports_indexed_dirs(osb)) {
+ /*
+ * Allocate our index cluster first, to maximize the
+ * possibility that unindexed leaves grow
+ * contiguously.
+ */
+ ret = __ocfs2_dx_dir_new_cluster(dir, 0, handle, data_ac,
+ dx_leaves, num_dx_leaves,
+ &dx_insert_blkno);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+ bytes_allocated += ocfs2_clusters_to_bytes(dir->i_sb, 1);
+ }
+
/*
* Try to claim as many clusters as the bitmap can give though
* if we only get one now, that's enough to continue. The rest
mlog_errno(ret);
goto out_commit;
}
+ bytes_allocated += ocfs2_clusters_to_bytes(dir->i_sb, 1);
/*
* Operations are carefully ordered so that we set up the new
goto out_commit;
}
+ if (ocfs2_supports_indexed_dirs(osb)) {
+ ret = ocfs2_dx_dir_index_block(dir, handle, dx_leaves,
+ num_dx_leaves, dirdata_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+ }
+
/*
* Set extent, i_size, etc on the directory. After this, the
* inode should contain the same exact dirents as before and
goto out_commit;
}
+ if (ocfs2_supports_indexed_dirs(osb)) {
+ ret = ocfs2_dx_dir_attach_index(osb, handle, dir, di_bh,
+ meta_ac, &dx_root_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ ocfs2_init_dx_root_extent_tree(&dx_et, dir, dx_root_bh);
+ ret = ocfs2_insert_extent(osb, handle, dir, &dx_et, 0,
+ dx_insert_blkno, 1, 0, NULL);
+ if (ret)
+ mlog_errno(ret);
+ }
+
/*
* We asked for two clusters, but only got one in the 1st
* pass. Claim the 2nd cluster as a separate extent.
mlog_errno(ret);
goto out_commit;
}
+ bytes_allocated += ocfs2_clusters_to_bytes(dir->i_sb, 1);
}
*first_block_bh = dirdata_bh;
dirdata_bh = NULL;
+ if (ocfs2_supports_indexed_dirs(osb)) {
+ unsigned int off;
+
+ /*
+ * We need to return the correct block within the
+ * cluster which should hold our entry.
+ */
+ off = ocfs2_dx_dir_hash_idx(OCFS2_SB(dir->i_sb),
+ &lookup->dl_hinfo);
+ get_bh(dx_leaves[off]);
+ lookup->dl_dx_leaf_bh = dx_leaves[off];
+ }
out_commit:
if (ret < 0 && did_quota)
- vfs_dq_free_space_nodirty(dir,
- ocfs2_clusters_to_bytes(osb->sb, 2));
+ vfs_dq_free_space_nodirty(dir, bytes_allocated);
+
ocfs2_commit_trans(osb, handle);
out_sem:
out:
if (data_ac)
ocfs2_free_alloc_context(data_ac);
+ if (meta_ac)
+ ocfs2_free_alloc_context(meta_ac);
+
+ if (dx_leaves) {
+ for (i = 0; i < num_dx_leaves; i++)
+ brelse(dx_leaves[i]);
+ kfree(dx_leaves);
+ }
brelse(dirdata_bh);
+ brelse(dx_root_bh);
return ret;
}
struct inode *dir,
struct buffer_head *parent_fe_bh,
unsigned int blocks_wanted,
+ struct ocfs2_dir_lookup_result *lookup,
struct buffer_head **new_de_bh)
{
int status = 0;
if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
status = ocfs2_expand_inline_dir(dir, parent_fe_bh,
- blocks_wanted, &new_bh);
+ blocks_wanted, lookup,
+ &new_bh);
if (status) {
mlog_errno(status);
goto bail;
return status;
}
-/*
- * Get a directory ready for insert. Any directory allocation required
- * happens here. Success returns zero, and enough context in the dir
- * lookup result that ocfs2_add_entry() will be able complete the task
- * with minimal performance impact.
- */
-int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
- struct inode *dir,
- struct buffer_head *parent_fe_bh,
- const char *name,
- int namelen,
- struct ocfs2_dir_lookup_result *lookup)
+static int dx_leaf_sort_cmp(const void *a, const void *b)
{
- int ret;
+ const struct ocfs2_dx_entry *entry1 = a;
+ const struct ocfs2_dx_entry *entry2 = b;
+ u32 major_hash1 = le32_to_cpu(entry1->dx_major_hash);
+ u32 major_hash2 = le32_to_cpu(entry2->dx_major_hash);
+ u32 minor_hash1 = le32_to_cpu(entry1->dx_minor_hash);
+ u32 minor_hash2 = le32_to_cpu(entry2->dx_minor_hash);
+
+ if (major_hash1 > major_hash2)
+ return 1;
+ if (major_hash1 < major_hash2)
+ return -1;
+
+ /*
+ * It is not strictly necessary to sort by minor
+ */
+ if (minor_hash1 > minor_hash2)
+ return 1;
+ if (minor_hash1 < minor_hash2)
+ return -1;
+ return 0;
+}
+
+static void dx_leaf_sort_swap(void *a, void *b, int size)
+{
+ struct ocfs2_dx_entry *entry1 = a;
+ struct ocfs2_dx_entry *entry2 = b;
+ struct ocfs2_dx_entry tmp;
+
+ BUG_ON(size != sizeof(*entry1));
+
+ tmp = *entry1;
+ *entry1 = *entry2;
+ *entry2 = tmp;
+}
+
+static int ocfs2_dx_leaf_same_major(struct ocfs2_dx_leaf *dx_leaf)
+{
+ struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list;
+ int i, num = le16_to_cpu(dl_list->de_num_used);
+
+ for (i = 0; i < (num - 1); i++) {
+ if (le32_to_cpu(dl_list->de_entries[i].dx_major_hash) !=
+ le32_to_cpu(dl_list->de_entries[i + 1].dx_major_hash))
+ return 0;
+ }
+
+ return 1;
+}
+
+/*
+ * Find the optimal value to split this leaf on. This expects the leaf
+ * entries to be in sorted order.
+ *
+ * leaf_cpos is the cpos of the leaf we're splitting. insert_hash is
+ * the hash we want to insert.
+ *
+ * This function is only concerned with the major hash - that which
+ * determines which cluster an item belongs to.
+ */
+static int ocfs2_dx_dir_find_leaf_split(struct ocfs2_dx_leaf *dx_leaf,
+ u32 leaf_cpos, u32 insert_hash,
+ u32 *split_hash)
+{
+ struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list;
+ int i, num_used = le16_to_cpu(dl_list->de_num_used);
+ int allsame;
+
+ /*
+ * There's a couple rare, but nasty corner cases we have to
+ * check for here. All of them involve a leaf where all value
+ * have the same hash, which is what we look for first.
+ *
+ * Most of the time, all of the above is false, and we simply
+ * pick the median value for a split.
+ */
+ allsame = ocfs2_dx_leaf_same_major(dx_leaf);
+ if (allsame) {
+ u32 val = le32_to_cpu(dl_list->de_entries[0].dx_major_hash);
+
+ if (val == insert_hash) {
+ /*
+ * No matter where we would choose to split,
+ * the new entry would want to occupy the same
+ * block as these. Since there's no space left
+ * in their existing block, we know there
+ * won't be space after the split.
+ */
+ return -ENOSPC;
+ }
+
+ if (val == leaf_cpos) {
+ /*
+ * Because val is the same as leaf_cpos (which
+ * is the smallest value this leaf can have),
+ * yet is not equal to insert_hash, then we
+ * know that insert_hash *must* be larger than
+ * val (and leaf_cpos). At least cpos+1 in value.
+ *
+ * We also know then, that there cannot be an
+ * adjacent extent (otherwise we'd be looking
+ * at it). Choosing this value gives us a
+ * chance to get some contiguousness.
+ */
+ *split_hash = leaf_cpos + 1;
+ return 0;
+ }
+
+ if (val > insert_hash) {
+ /*
+ * val can not be the same as insert hash, and
+ * also must be larger than leaf_cpos. Also,
+ * we know that there can't be a leaf between
+ * cpos and val, otherwise the entries with
+ * hash 'val' would be there.
+ */
+ *split_hash = val;
+ return 0;
+ }
+
+ *split_hash = insert_hash;
+ return 0;
+ }
+
+ /*
+ * Since the records are sorted and the checks above
+ * guaranteed that not all records in this block are the same,
+ * we simple travel forward, from the median, and pick the 1st
+ * record whose value is larger than leaf_cpos.
+ */
+ for (i = (num_used / 2); i < num_used; i++)
+ if (le32_to_cpu(dl_list->de_entries[i].dx_major_hash) >
+ leaf_cpos)
+ break;
+
+ BUG_ON(i == num_used); /* Should be impossible */
+ *split_hash = le32_to_cpu(dl_list->de_entries[i].dx_major_hash);
+ return 0;
+}
+
+/*
+ * Transfer all entries in orig_dx_leaves whose major hash is equal to or
+ * larger than split_hash into new_dx_leaves. We use a temporary
+ * buffer (tmp_dx_leaf) to make the changes to the original leaf blocks.
+ *
+ * Since the block offset inside a leaf (cluster) is a constant mask
+ * of minor_hash, we can optimize - an item at block offset X within
+ * the original cluster, will be at offset X within the new cluster.
+ */
+static void ocfs2_dx_dir_transfer_leaf(struct inode *dir, u32 split_hash,
+ handle_t *handle,
+ struct ocfs2_dx_leaf *tmp_dx_leaf,
+ struct buffer_head **orig_dx_leaves,
+ struct buffer_head **new_dx_leaves,
+ int num_dx_leaves)
+{
+ int i, j, num_used;
+ u32 major_hash;
+ struct ocfs2_dx_leaf *orig_dx_leaf, *new_dx_leaf;
+ struct ocfs2_dx_entry_list *orig_list, *new_list, *tmp_list;
+ struct ocfs2_dx_entry *dx_entry;
+
+ tmp_list = &tmp_dx_leaf->dl_list;
+
+ for (i = 0; i < num_dx_leaves; i++) {
+ orig_dx_leaf = (struct ocfs2_dx_leaf *) orig_dx_leaves[i]->b_data;
+ orig_list = &orig_dx_leaf->dl_list;
+ new_dx_leaf = (struct ocfs2_dx_leaf *) new_dx_leaves[i]->b_data;
+ new_list = &new_dx_leaf->dl_list;
+
+ num_used = le16_to_cpu(orig_list->de_num_used);
+
+ memcpy(tmp_dx_leaf, orig_dx_leaf, dir->i_sb->s_blocksize);
+ tmp_list->de_num_used = cpu_to_le16(0);
+ memset(&tmp_list->de_entries, 0, sizeof(*dx_entry)*num_used);
+
+ for (j = 0; j < num_used; j++) {
+ dx_entry = &orig_list->de_entries[j];
+ major_hash = le32_to_cpu(dx_entry->dx_major_hash);
+ if (major_hash >= split_hash)
+ ocfs2_dx_dir_leaf_insert_tail(new_dx_leaf,
+ dx_entry);
+ else
+ ocfs2_dx_dir_leaf_insert_tail(tmp_dx_leaf,
+ dx_entry);
+ }
+ memcpy(orig_dx_leaf, tmp_dx_leaf, dir->i_sb->s_blocksize);
+
+ ocfs2_journal_dirty(handle, orig_dx_leaves[i]);
+ ocfs2_journal_dirty(handle, new_dx_leaves[i]);
+ }
+}
+
+static int ocfs2_dx_dir_rebalance_credits(struct ocfs2_super *osb,
+ struct ocfs2_dx_root_block *dx_root)
+{
+ int credits = ocfs2_clusters_to_blocks(osb->sb, 2);
+
+ credits += ocfs2_calc_extend_credits(osb->sb, &dx_root->dr_list, 1);
+ credits += ocfs2_quota_trans_credits(osb->sb);
+ return credits;
+}
+
+/*
+ * Find the median value in dx_leaf_bh and allocate a new leaf to move
+ * half our entries into.
+ */
+static int ocfs2_dx_dir_rebalance(struct ocfs2_super *osb, struct inode *dir,
+ struct buffer_head *dx_root_bh,
+ struct buffer_head *dx_leaf_bh,
+ struct ocfs2_dx_hinfo *hinfo, u32 leaf_cpos,
+ u64 leaf_blkno)
+{
+ struct ocfs2_dx_leaf *dx_leaf = (struct ocfs2_dx_leaf *)dx_leaf_bh->b_data;
+ int credits, ret, i, num_used, did_quota = 0;
+ u32 cpos, split_hash, insert_hash = hinfo->major_hash;
+ u64 orig_leaves_start;
+ int num_dx_leaves;
+ struct buffer_head **orig_dx_leaves = NULL;
+ struct buffer_head **new_dx_leaves = NULL;
+ struct ocfs2_alloc_context *data_ac = NULL, *meta_ac = NULL;
+ struct ocfs2_extent_tree et;
+ handle_t *handle = NULL;
+ struct ocfs2_dx_root_block *dx_root;
+ struct ocfs2_dx_leaf *tmp_dx_leaf = NULL;
+
+ mlog(0, "DX Dir: %llu, rebalance leaf leaf_blkno: %llu insert: %u\n",
+ (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ (unsigned long long)leaf_blkno, insert_hash);
+
+ ocfs2_init_dx_root_extent_tree(&et, dir, dx_root_bh);
+
+ dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
+ /*
+ * XXX: This is a rather large limit. We should use a more
+ * realistic value.
+ */
+ if (le32_to_cpu(dx_root->dr_clusters) == UINT_MAX)
+ return -ENOSPC;
+
+ num_used = le16_to_cpu(dx_leaf->dl_list.de_num_used);
+ if (num_used < le16_to_cpu(dx_leaf->dl_list.de_count)) {
+ mlog(ML_ERROR, "DX Dir: %llu, Asked to rebalance empty leaf: "
+ "%llu, %d\n", (unsigned long long)OCFS2_I(dir)->ip_blkno,
+ (unsigned long long)leaf_blkno, num_used);
+ ret = -EIO;
+ goto out;
+ }
+
+ orig_dx_leaves = ocfs2_dx_dir_kmalloc_leaves(osb->sb, &num_dx_leaves);
+ if (!orig_dx_leaves) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ new_dx_leaves = ocfs2_dx_dir_kmalloc_leaves(osb->sb, NULL);
+ if (!new_dx_leaves) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_lock_allocators(dir, &et, 1, 0, &data_ac, &meta_ac);
+ if (ret) {
+ if (ret != -ENOSPC)
+ mlog_errno(ret);
+ goto out;
+ }
+
+ credits = ocfs2_dx_dir_rebalance_credits(osb, dx_root);
+ handle = ocfs2_start_trans(osb, credits);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ handle = NULL;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (vfs_dq_alloc_space_nodirty(dir,
+ ocfs2_clusters_to_bytes(dir->i_sb, 1))) {
+ ret = -EDQUOT;
+ goto out_commit;
+ }
+ did_quota = 1;
+
+ ret = ocfs2_journal_access_dl(handle, dir, dx_leaf_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ /*
+ * This block is changing anyway, so we can sort it in place.
+ */
+ sort(dx_leaf->dl_list.de_entries, num_used,
+ sizeof(struct ocfs2_dx_entry), dx_leaf_sort_cmp,
+ dx_leaf_sort_swap);
+
+ ret = ocfs2_journal_dirty(handle, dx_leaf_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ ret = ocfs2_dx_dir_find_leaf_split(dx_leaf, leaf_cpos, insert_hash,
+ &split_hash);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ mlog(0, "Split leaf (%u) at %u, insert major hash is %u\n",
+ leaf_cpos, split_hash, insert_hash);
+
+ /*
+ * We have to carefully order operations here. There are items
+ * which want to be in the new cluster before insert, but in
+ * order to put those items in the new cluster, we alter the
+ * old cluster. A failure to insert gets nasty.
+ *
+ * So, start by reserving writes to the old
+ * cluster. ocfs2_dx_dir_new_cluster will reserve writes on
+ * the new cluster for us, before inserting it. The insert
+ * won't happen if there's an error before that. Once the
+ * insert is done then, we can transfer from one leaf into the
+ * other without fear of hitting any error.
+ */
+
+ /*
+ * The leaf transfer wants some scratch space so that we don't
+ * wind up doing a bunch of expensive memmove().
+ */
+ tmp_dx_leaf = kmalloc(osb->sb->s_blocksize, GFP_NOFS);
+ if (!tmp_dx_leaf) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ orig_leaves_start = leaf_blkno & ~(osb->s_clustersize_bits -
+ osb->sb->s_blocksize_bits);
+ ret = ocfs2_read_dx_leaves(dir, orig_leaves_start, num_dx_leaves,
+ orig_dx_leaves);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ for (i = 0; i < num_dx_leaves; i++) {
+ ret = ocfs2_journal_access_dl(handle, dir, orig_dx_leaves[i],
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+ }
+
+ cpos = split_hash;
+ ret = ocfs2_dx_dir_new_cluster(dir, &et, cpos, handle,
+ data_ac, meta_ac, new_dx_leaves,
+ num_dx_leaves);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ ocfs2_dx_dir_transfer_leaf(dir, split_hash, handle, tmp_dx_leaf,
+ orig_dx_leaves, new_dx_leaves, num_dx_leaves);
+
+out_commit:
+ if (ret < 0 && did_quota)
+ vfs_dq_free_space_nodirty(dir,
+ ocfs2_clusters_to_bytes(dir->i_sb, 1));
+
+ ocfs2_commit_trans(osb, handle);
+
+out:
+ if (orig_dx_leaves || new_dx_leaves) {
+ for (i = 0; i < num_dx_leaves; i++) {
+ if (orig_dx_leaves)
+ brelse(orig_dx_leaves[i]);
+ if (new_dx_leaves)
+ brelse(new_dx_leaves[i]);
+ }
+ kfree(orig_dx_leaves);
+ kfree(new_dx_leaves);
+ }
+
+ if (meta_ac)
+ ocfs2_free_alloc_context(meta_ac);
+ if (data_ac)
+ ocfs2_free_alloc_context(data_ac);
+
+ kfree(tmp_dx_leaf);
+ return ret;
+}
+
+static int ocfs2_find_dir_space_dx(struct ocfs2_super *osb, struct inode *dir,
+ struct buffer_head *di_bh, const char *name,
+ int namelen,
+ struct ocfs2_dir_lookup_result *lookup)
+{
+ int ret, rebalanced = 0;
+ struct buffer_head *dx_root_bh = NULL;
+ struct ocfs2_dx_root_block *dx_root;
+ struct buffer_head *dx_leaf_bh = NULL;
+ struct ocfs2_dx_leaf *dx_leaf;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+ u64 blkno;
+ u32 leaf_cpos;
+
+ ret = ocfs2_read_dx_root(dir, di, &dx_root_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
+
+restart_search:
+ ret = ocfs2_dx_dir_lookup(dir, &dx_root->dr_list, &lookup->dl_hinfo,
+ &leaf_cpos, &blkno);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_read_dx_leaf(dir, blkno, &dx_leaf_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ dx_leaf = (struct ocfs2_dx_leaf *)dx_leaf_bh->b_data;
+
+ if (le16_to_cpu(dx_leaf->dl_list.de_num_used) >=
+ le16_to_cpu(dx_leaf->dl_list.de_count)) {
+ if (rebalanced) {
+ /*
+ * Rebalancing should have provided us with
+ * space in an appropriate leaf.
+ *
+ * XXX: Is this an abnormal condition then?
+ * Should we print a message here?
+ */
+ ret = -ENOSPC;
+ goto out;
+ }
+
+ ret = ocfs2_dx_dir_rebalance(osb, dir, dx_root_bh, dx_leaf_bh,
+ &lookup->dl_hinfo, leaf_cpos,
+ blkno);
+ if (ret) {
+ if (ret != -ENOSPC)
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /*
+ * Restart the lookup. The rebalance might have
+ * changed which block our item fits into. Mark our
+ * progress, so we only execute this once.
+ */
+ brelse(dx_leaf_bh);
+ dx_leaf_bh = NULL;
+ rebalanced = 1;
+ goto restart_search;
+ }
+
+ lookup->dl_dx_leaf_bh = dx_leaf_bh;
+ dx_leaf_bh = NULL;
+
+out:
+ brelse(dx_leaf_bh);
+ brelse(dx_root_bh);
+ return ret;
+}
+
+/*
+ * Get a directory ready for insert. Any directory allocation required
+ * happens here. Success returns zero, and enough context in the dir
+ * lookup result that ocfs2_add_entry() will be able complete the task
+ * with minimal performance impact.
+ */
+int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb,
+ struct inode *dir,
+ struct buffer_head *parent_fe_bh,
+ const char *name,
+ int namelen,
+ struct ocfs2_dir_lookup_result *lookup)
+{
+ int ret;
unsigned int blocks_wanted = 1;
struct buffer_head *bh = NULL;
goto out;
}
+ /*
+ * Do this up front to reduce confusion.
+ *
+ * The directory might start inline, then be turned into an
+ * indexed one, in which case we'd need to hash deep inside
+ * ocfs2_find_dir_space_id(). Since
+ * ocfs2_prepare_dx_dir_for_insert() also needs this hash
+ * done, there seems no point in spreading out the calls. We
+ * can optimize away the case where the file system doesn't
+ * support indexing.
+ */
+ if (ocfs2_supports_indexed_dirs(osb))
+ ocfs2_dx_dir_name_hash(dir, name, namelen, &lookup->dl_hinfo);
+
+ if (ocfs2_dir_indexed(dir)) {
+ ret = ocfs2_find_dir_space_dx(osb, dir, parent_fe_bh, name,
+ namelen, lookup);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ /*
+ * We intentionally fall through so that the unindexed
+ * tree can also be prepared.
+ */
+ }
+
if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
ret = ocfs2_find_dir_space_id(dir, parent_fe_bh, name,
namelen, &bh, &blocks_wanted);
BUG_ON(bh);
ret = ocfs2_extend_dir(osb, dir, parent_fe_bh, blocks_wanted,
- &bh);
+ lookup, &bh);
if (ret) {
if (ret != -ENOSPC)
mlog_errno(ret);
brelse(bh);
return ret;
}
+
+static int ocfs2_dx_dir_remove_index(struct inode *dir,
+ struct buffer_head *di_bh,
+ struct buffer_head *dx_root_bh)
+{
+ int ret;
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+ struct ocfs2_dx_root_block *dx_root;
+ struct inode *dx_alloc_inode = NULL;
+ struct buffer_head *dx_alloc_bh = NULL;
+ handle_t *handle;
+ u64 blk;
+ u16 bit;
+ u64 bg_blkno;
+
+ dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data;
+
+ dx_alloc_inode = ocfs2_get_system_file_inode(osb,
+ EXTENT_ALLOC_SYSTEM_INODE,
+ le16_to_cpu(dx_root->dr_suballoc_slot));
+ if (!dx_alloc_inode) {
+ ret = -ENOMEM;
+ mlog_errno(ret);
+ goto out;
+ }
+ mutex_lock(&dx_alloc_inode->i_mutex);
+
+ ret = ocfs2_inode_lock(dx_alloc_inode, &dx_alloc_bh, 1);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_mutex;
+ }
+
+ handle = ocfs2_start_trans(osb, OCFS2_DX_ROOT_REMOVE_CREDITS);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ mlog_errno(ret);
+ goto out_unlock;
+ }
+
+ ret = ocfs2_journal_access_di(handle, dir, di_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ OCFS2_I(dir)->ip_dyn_features &= ~OCFS2_INDEXED_DIR_FL;
+ di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features);
+ di->i_dx_root = cpu_to_le64(0ULL);
+
+ ocfs2_journal_dirty(handle, di_bh);
+
+ blk = le64_to_cpu(dx_root->dr_blkno);
+ bit = le16_to_cpu(dx_root->dr_suballoc_bit);
+ bg_blkno = ocfs2_which_suballoc_group(blk, bit);
+ ret = ocfs2_free_suballoc_bits(handle, dx_alloc_inode, dx_alloc_bh,
+ bit, bg_blkno, 1);
+ if (ret)
+ mlog_errno(ret);
+
+out_commit:
+ ocfs2_commit_trans(osb, handle);
+
+out_unlock:
+ ocfs2_inode_unlock(dx_alloc_inode, 1);
+
+out_mutex:
+ mutex_unlock(&dx_alloc_inode->i_mutex);
+ brelse(dx_alloc_bh);
+out:
+ iput(dx_alloc_inode);
+ return ret;
+}
+
+int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh)
+{
+ int ret;
+ unsigned int uninitialized_var(clen);
+ u32 major_hash = UINT_MAX, p_cpos, uninitialized_var(cpos);
+ u64 uninitialized_var(blkno);
+ struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
+ struct buffer_head *dx_root_bh = NULL;
+ struct ocfs2_dx_root_block *dx_root;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
+ struct ocfs2_cached_dealloc_ctxt dealloc;
+ struct ocfs2_extent_tree et;
+
+ ocfs2_init_dealloc_ctxt(&dealloc);
+
+ if (!ocfs2_dir_indexed(dir))
+ return 0;
+
+ ret = ocfs2_read_dx_root(dir, di, &dx_root_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ocfs2_init_dx_root_extent_tree(&et, dir, dx_root_bh);
+
+ dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data;
+
+ /* XXX: What if dr_clusters is too large? */
+ while (le32_to_cpu(dx_root->dr_clusters)) {
+ ret = ocfs2_dx_dir_lookup_rec(dir, &dx_root->dr_list,
+ major_hash, &cpos, &blkno, &clen);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ p_cpos = ocfs2_blocks_to_clusters(dir->i_sb, blkno);
+
+ ret = ocfs2_remove_btree_range(dir, &et, cpos, p_cpos, clen,
+ &dealloc);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (cpos == 0)
+ break;
+
+ major_hash = cpos - 1;
+ }
+
+ ret = ocfs2_dx_dir_remove_index(dir, di_bh, dx_root_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ocfs2_remove_from_cache(dir, dx_root_bh);
+out:
+ ocfs2_schedule_truncate_log_flush(osb, 1);
+ ocfs2_run_deallocs(osb, &dealloc);
+
+ brelse(dx_root_bh);
+ return ret;
+}
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff