From aaedb55bc08f384b7f57dbb3222a511baed4decf Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Fri, 11 Oct 2013 14:44:09 -0400 Subject: [PATCH] Btrfs: add tests for btrfs_get_extent I'm going to be removing hole extents in the near future so I wanted to make a sanity test for btrfs_get_extent to make sure I don't break anything in the meantime. This patch just puts btrfs_get_extent through its paces by giving it a completely unreasonable mapping to look at and make sure it is giving us back maps that make sense. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/Makefile | 3 +- fs/btrfs/ctree.h | 4 + fs/btrfs/inode.c | 8 + fs/btrfs/super.c | 3 + fs/btrfs/tests/btrfs-tests.c | 8 +- fs/btrfs/tests/btrfs-tests.h | 5 + fs/btrfs/tests/inode-tests.c | 832 +++++++++++++++++++++++++++++++++++ 7 files changed, 861 insertions(+), 2 deletions(-) create mode 100644 fs/btrfs/tests/inode-tests.c diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile index cac4f2d001a3..1a44e42d602a 100644 --- a/fs/btrfs/Makefile +++ b/fs/btrfs/Makefile @@ -15,4 +15,5 @@ btrfs-$(CONFIG_BTRFS_FS_POSIX_ACL) += acl.o btrfs-$(CONFIG_BTRFS_FS_CHECK_INTEGRITY) += check-integrity.o btrfs-$(CONFIG_BTRFS_FS_RUN_SANITY_TESTS) += tests/free-space-tests.o \ - tests/extent-buffer-tests.o tests/btrfs-tests.o tests/extent-io-tests.o + tests/extent-buffer-tests.o tests/btrfs-tests.o \ + tests/extent-io-tests.o tests/inode-tests.o diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 2f398062b942..9f5e1cfb0209 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -4034,5 +4034,9 @@ static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) return signal_pending(current); } +/* Sanity test specific functions */ +#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS +void btrfs_test_destroy_inode(struct inode *inode); +#endif #endif diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index bba7f1a5e9f3..b5c2ad8fe2ca 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -7795,6 +7795,14 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) return inode; } +#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS +void btrfs_test_destroy_inode(struct inode *inode) +{ + btrfs_drop_extent_cache(inode, 0, (u64)-1, 0); + kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode)); +} +#endif + static void btrfs_i_callback(struct rcu_head *head) { struct inode *inode = container_of(head, struct inode, i_rcu); diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 78041e34d15a..1f62c1ccab1f 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1802,6 +1802,9 @@ static int btrfs_run_sanity_tests(void) if (ret) goto out; ret = btrfs_test_extent_io(); + if (ret) + goto out; + ret = btrfs_test_inodes(); out: btrfs_destroy_test_fs(); return ret; diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c index 697d527377c1..757ef00a75a4 100644 --- a/fs/btrfs/tests/btrfs-tests.c +++ b/fs/btrfs/tests/btrfs-tests.c @@ -24,11 +24,17 @@ static struct vfsmount *test_mnt = NULL; +static const struct super_operations btrfs_test_super_ops = { + .alloc_inode = btrfs_alloc_inode, + .destroy_inode = btrfs_test_destroy_inode, +}; + static struct dentry *btrfs_test_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - return mount_pseudo(fs_type, "btrfs_test:", NULL, NULL, BTRFS_TEST_MAGIC); + return mount_pseudo(fs_type, "btrfs_test:", &btrfs_test_super_ops, + NULL, BTRFS_TEST_MAGIC); } static struct file_system_type test_type = { diff --git a/fs/btrfs/tests/btrfs-tests.h b/fs/btrfs/tests/btrfs-tests.h index e935fe5291e7..b353bc806ca0 100644 --- a/fs/btrfs/tests/btrfs-tests.h +++ b/fs/btrfs/tests/btrfs-tests.h @@ -26,6 +26,7 @@ int btrfs_test_free_space_cache(void); int btrfs_test_extent_buffer_operations(void); int btrfs_test_extent_io(void); +int btrfs_test_inodes(void); int btrfs_init_test_fs(void); void btrfs_destroy_test_fs(void); struct inode *btrfs_new_test_inode(void); @@ -49,6 +50,10 @@ static inline int btrfs_test_extent_io(void) { return 0; } +static inline int btrfs_test_inodes(void) +{ + return 0; +} #endif #endif diff --git a/fs/btrfs/tests/inode-tests.c b/fs/btrfs/tests/inode-tests.c new file mode 100644 index 000000000000..b0fc3bab2a96 --- /dev/null +++ b/fs/btrfs/tests/inode-tests.c @@ -0,0 +1,832 @@ +/* + * Copyright (C) 2013 Fusion IO. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#include "btrfs-tests.h" +#include "../ctree.h" +#include "../btrfs_inode.h" +#include "../disk-io.h" +#include "../extent_io.h" +#include "../volumes.h" + +static struct btrfs_fs_info *alloc_dummy_fs_info(void) +{ + struct btrfs_fs_info *fs_info = kzalloc(sizeof(struct btrfs_fs_info), + GFP_NOFS); + if (!fs_info) + return fs_info; + fs_info->fs_devices = kzalloc(sizeof(struct btrfs_fs_devices), + GFP_NOFS); + if (!fs_info->fs_devices) { + kfree(fs_info); + return NULL; + } + return fs_info; +} +static void free_dummy_root(struct btrfs_root *root) +{ + if (!root) + return; + if (root->fs_info) { + kfree(root->fs_info->fs_devices); + kfree(root->fs_info); + } + if (root->node) + free_extent_buffer(root->node); + kfree(root); +} + +static void insert_extent(struct btrfs_root *root, u64 start, u64 len, + u64 ram_bytes, u64 offset, u64 disk_bytenr, + u64 disk_len, u32 type, u8 compression, int slot) +{ + struct btrfs_path path; + struct btrfs_file_extent_item *fi; + struct extent_buffer *leaf = root->node; + struct btrfs_key key; + u32 value_len = sizeof(struct btrfs_file_extent_item); + + if (type == BTRFS_FILE_EXTENT_INLINE) + value_len += len; + memset(&path, 0, sizeof(path)); + + path.nodes[0] = leaf; + path.slots[0] = slot; + + key.objectid = BTRFS_FIRST_FREE_OBJECTID; + key.type = BTRFS_EXTENT_DATA_KEY; + key.offset = start; + + setup_items_for_insert(root, &path, &key, &value_len, value_len, + value_len + sizeof(struct btrfs_item), 1); + fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item); + btrfs_set_file_extent_generation(leaf, fi, 1); + btrfs_set_file_extent_type(leaf, fi, type); + btrfs_set_file_extent_disk_bytenr(leaf, fi, disk_bytenr); + btrfs_set_file_extent_disk_num_bytes(leaf, fi, disk_len); + btrfs_set_file_extent_offset(leaf, fi, offset); + btrfs_set_file_extent_num_bytes(leaf, fi, len); + btrfs_set_file_extent_ram_bytes(leaf, fi, ram_bytes); + btrfs_set_file_extent_compression(leaf, fi, compression); + btrfs_set_file_extent_encryption(leaf, fi, 0); + btrfs_set_file_extent_other_encoding(leaf, fi, 0); +} + +/* + * Build the most complicated map of extents the earth has ever seen. We want + * this so we can test all of the corner cases of btrfs_get_extent. Here is a + * diagram of how the extents will look though this may not be possible we still + * want to make sure everything acts normally (the last number is not inclusive) + * + * [0 - 5][5 - 6][6 - 10][10 - 4096][ 4096 - 8192 ][8192 - 12288] + * [hole ][inline][ hole ][ regular ][regular1 split][ hole ] + * + * [ 12288 - 20480][20480 - 24576][ 24576 - 28672 ][28672 - 36864][36864 - 45056] + * [regular1 split][ prealloc1 ][prealloc1 written][ prealloc1 ][ compressed ] + * + * [45056 - 49152][49152-53248][53248-61440][61440-65536][ 65536+81920 ] + * [ compressed1 ][ regular ][compressed1][ regular ][ hole but no extent] + * + * [81920-86016] + * [ regular ] + */ +static void setup_file_extents(struct btrfs_root *root) +{ + int slot = 0; + u64 disk_bytenr = 1 * 1024 * 1024; + u64 offset = 0; + + /* First we want a hole */ + insert_extent(root, offset, 5, 5, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0, + slot); + slot++; + offset += 5; + + /* + * Now we want an inline extent, I don't think this is possible but hey + * why not? Also keep in mind if we have an inline extent it counts as + * the whole first page. If we were to expand it we would have to cow + * and we wouldn't have an inline extent anymore. + */ + insert_extent(root, offset, 1, 1, 0, 0, 0, BTRFS_FILE_EXTENT_INLINE, 0, + slot); + slot++; + offset = 4096; + + /* Now another hole */ + insert_extent(root, offset, 4, 4, 0, 0, 0, BTRFS_FILE_EXTENT_REG, 0, + slot); + slot++; + offset += 4; + + /* Now for a regular extent */ + insert_extent(root, offset, 4095, 4095, 0, disk_bytenr, 4096, + BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + disk_bytenr += 4096; + offset += 4095; + + /* + * Now for 3 extents that were split from a hole punch so we test + * offsets properly. + */ + insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384, + BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += 4096; + insert_extent(root, offset, 4096, 4096, 0, 0, 0, BTRFS_FILE_EXTENT_REG, + 0, slot); + slot++; + offset += 4096; + insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384, + BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += 8192; + disk_bytenr += 16384; + + /* Now for a unwritten prealloc extent */ + insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096, + BTRFS_FILE_EXTENT_PREALLOC, 0, slot); + slot++; + offset += 4096; + + /* + * We want to jack up disk_bytenr a little more so the em stuff doesn't + * merge our records. + */ + disk_bytenr += 8192; + + /* + * Now for a partially written prealloc extent, basically the same as + * the hole punch example above. Ram_bytes never changes when you mark + * extents written btw. + */ + insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 16384, + BTRFS_FILE_EXTENT_PREALLOC, 0, slot); + slot++; + offset += 4096; + insert_extent(root, offset, 4096, 16384, 4096, disk_bytenr, 16384, + BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += 4096; + insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 16384, + BTRFS_FILE_EXTENT_PREALLOC, 0, slot); + slot++; + offset += 8192; + disk_bytenr += 16384; + + /* Now a normal compressed extent */ + insert_extent(root, offset, 8192, 8192, 0, disk_bytenr, 4096, + BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot); + slot++; + offset += 8192; + /* No merges */ + disk_bytenr += 8192; + + /* Now a split compressed extent */ + insert_extent(root, offset, 4096, 16384, 0, disk_bytenr, 4096, + BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot); + slot++; + offset += 4096; + insert_extent(root, offset, 4096, 4096, 0, disk_bytenr + 4096, 4096, + BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += 4096; + insert_extent(root, offset, 8192, 16384, 8192, disk_bytenr, 4096, + BTRFS_FILE_EXTENT_REG, BTRFS_COMPRESS_ZLIB, slot); + slot++; + offset += 8192; + disk_bytenr += 8192; + + /* Now extents that have a hole but no hole extent */ + insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096, + BTRFS_FILE_EXTENT_REG, 0, slot); + slot++; + offset += 16384; + disk_bytenr += 4096; + insert_extent(root, offset, 4096, 4096, 0, disk_bytenr, 4096, + BTRFS_FILE_EXTENT_REG, 0, slot); +} + +static unsigned long prealloc_only = 0; +static unsigned long compressed_only = 0; +static unsigned long vacancy_only = 0; + +static noinline int test_btrfs_get_extent(void) +{ + struct inode *inode = NULL; + struct btrfs_root *root = NULL; + struct extent_map *em = NULL; + u64 orig_start; + u64 disk_bytenr; + u64 offset; + int ret = -ENOMEM; + + set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only); + set_bit(EXTENT_FLAG_VACANCY, &vacancy_only); + set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only); + + inode = btrfs_new_test_inode(); + if (!inode) { + test_msg("Couldn't allocate inode\n"); + return ret; + } + + BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY; + BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID; + BTRFS_I(inode)->location.offset = 0; + + root = btrfs_alloc_dummy_root(); + if (IS_ERR(root)) { + test_msg("Couldn't allocate root\n"); + goto out; + } + + /* + * We do this since btrfs_get_extent wants to assign em->bdev to + * root->fs_info->fs_devices->latest_bdev. + */ + root->fs_info = alloc_dummy_fs_info(); + if (!root->fs_info) { + test_msg("Couldn't allocate dummy fs info\n"); + goto out; + } + + root->node = alloc_dummy_extent_buffer(0, 4096); + if (!root->node) { + test_msg("Couldn't allocate dummy buffer\n"); + goto out; + } + + /* + * We will just free a dummy node if it's ref count is 2 so we need an + * extra ref so our searches don't accidently release our page. + */ + extent_buffer_get(root->node); + btrfs_set_header_nritems(root->node, 0); + btrfs_set_header_level(root->node, 0); + ret = -EINVAL; + + /* First with no extents */ + BTRFS_I(inode)->root = root; + em = btrfs_get_extent(inode, NULL, 0, 0, 4096, 0); + if (IS_ERR(em)) { + em = NULL; + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start != EXTENT_MAP_HOLE) { + test_msg("Expected a hole, got %llu\n", em->block_start); + goto out; + } + if (!test_bit(EXTENT_FLAG_VACANCY, &em->flags)) { + test_msg("Vacancy flag wasn't set properly\n"); + goto out; + } + free_extent_map(em); + btrfs_drop_extent_cache(inode, 0, (u64)-1, 0); + + /* + * All of the magic numbers are based on the mapping setup in + * setup_file_extents, so if you change anything there you need to + * update the comment and update the expected values below. + */ + setup_file_extents(root); + + em = btrfs_get_extent(inode, NULL, 0, 0, (u64)-1, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start != EXTENT_MAP_HOLE) { + test_msg("Expected a hole, got %llu\n", em->block_start); + goto out; + } + if (em->start != 0 || em->len != 5) { + test_msg("Unexpected extent wanted start 0 len 5, got start " + "%llu len %llu\n", em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start != EXTENT_MAP_INLINE) { + test_msg("Expected an inline, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4091) { + test_msg("Unexpected extent wanted start %llu len 1, got start " + "%llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + /* + * We don't test anything else for inline since it doesn't get set + * unless we have a page for it to write into. Maybe we should change + * this? + */ + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start != EXTENT_MAP_HOLE) { + test_msg("Expected a hole, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4) { + test_msg("Unexpected extent wanted start %llu len 4, got start " + "%llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + /* Regular extent */ + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4095) { + test_msg("Unexpected extent wanted start %llu len 4095, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", em->start, + em->orig_start); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + /* The next 3 are split extents */ + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4096) { + test_msg("Unexpected extent wanted start %llu len 4096, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", em->start, + em->orig_start); + goto out; + } + disk_bytenr = em->block_start; + orig_start = em->start; + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start != EXTENT_MAP_HOLE) { + test_msg("Expected a hole, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4096) { + test_msg("Unexpected extent wanted start %llu len 4096, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 8192) { + test_msg("Unexpected extent wanted start %llu len 8192, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + if (em->orig_start != orig_start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", + orig_start, em->orig_start); + goto out; + } + disk_bytenr += (em->start - orig_start); + if (em->block_start != disk_bytenr) { + test_msg("Wrong block start, want %llu, have %llu\n", + disk_bytenr, em->block_start); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + /* Prealloc extent */ + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4096) { + test_msg("Unexpected extent wanted start %llu len 4096, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != prealloc_only) { + test_msg("Unexpected flags set, want %lu have %lu\n", + prealloc_only, em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", em->start, + em->orig_start); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + /* The next 3 are a half written prealloc extent */ + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4096) { + test_msg("Unexpected extent wanted start %llu len 4096, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != prealloc_only) { + test_msg("Unexpected flags set, want %lu have %lu\n", + prealloc_only, em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", em->start, + em->orig_start); + goto out; + } + disk_bytenr = em->block_start; + orig_start = em->start; + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_HOLE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4096) { + test_msg("Unexpected extent wanted start %llu len 4096, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + if (em->orig_start != orig_start) { + test_msg("Unexpected orig offset, wanted %llu, have %llu\n", + orig_start, em->orig_start); + goto out; + } + if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) { + test_msg("Unexpected block start, wanted %llu, have %llu\n", + disk_bytenr + (em->start - em->orig_start), + em->block_start); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 8192) { + test_msg("Unexpected extent wanted start %llu len 8192, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != prealloc_only) { + test_msg("Unexpected flags set, want %lu have %lu\n", + prealloc_only, em->flags); + goto out; + } + if (em->orig_start != orig_start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", orig_start, + em->orig_start); + goto out; + } + if (em->block_start != (disk_bytenr + (em->start - em->orig_start))) { + test_msg("Unexpected block start, wanted %llu, have %llu\n", + disk_bytenr + (em->start - em->orig_start), + em->block_start); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + /* Now for the compressed extent */ + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 8192) { + test_msg("Unexpected extent wanted start %llu len 8192, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != compressed_only) { + test_msg("Unexpected flags set, want %lu have %lu\n", + compressed_only, em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", + em->start, em->orig_start); + goto out; + } + if (em->compress_type != BTRFS_COMPRESS_ZLIB) { + test_msg("Unexpected compress type, wanted %d, got %d\n", + BTRFS_COMPRESS_ZLIB, em->compress_type); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + /* Split compressed extent */ + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4096) { + test_msg("Unexpected extent wanted start %llu len 4096, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != compressed_only) { + test_msg("Unexpected flags set, want %lu have %lu\n", + compressed_only, em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", + em->start, em->orig_start); + goto out; + } + if (em->compress_type != BTRFS_COMPRESS_ZLIB) { + test_msg("Unexpected compress type, wanted %d, got %d\n", + BTRFS_COMPRESS_ZLIB, em->compress_type); + goto out; + } + disk_bytenr = em->block_start; + orig_start = em->start; + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4096) { + test_msg("Unexpected extent wanted start %llu len 4096, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", em->start, + em->orig_start); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start != disk_bytenr) { + test_msg("Block start does not match, want %llu got %llu\n", + disk_bytenr, em->block_start); + goto out; + } + if (em->start != offset || em->len != 8192) { + test_msg("Unexpected extent wanted start %llu len 8192, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != compressed_only) { + test_msg("Unexpected flags set, want %lu have %lu\n", + compressed_only, em->flags); + goto out; + } + if (em->orig_start != orig_start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", + em->start, orig_start); + goto out; + } + if (em->compress_type != BTRFS_COMPRESS_ZLIB) { + test_msg("Unexpected compress type, wanted %d, got %d\n", + BTRFS_COMPRESS_ZLIB, em->compress_type); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + /* A hole between regular extents but no hole extent */ + em = btrfs_get_extent(inode, NULL, 0, offset + 6, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4096) { + test_msg("Unexpected extent wanted start %llu len 4096, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", em->start, + em->orig_start); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096 * 1024, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start != EXTENT_MAP_HOLE) { + test_msg("Expected a hole extent, got %llu\n", em->block_start); + goto out; + } + /* + * Currently we just return a length that we requested rather than the + * length of the actual hole, if this changes we'll have to change this + * test. + */ + if (em->start != offset || em->len != 12288) { + test_msg("Unexpected extent wanted start %llu len 12288, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != vacancy_only) { + test_msg("Unexpected flags set, want %lu have %lu\n", + vacancy_only, em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", em->start, + em->orig_start); + goto out; + } + offset = em->start + em->len; + free_extent_map(em); + + em = btrfs_get_extent(inode, NULL, 0, offset, 4096, 0); + if (IS_ERR(em)) { + test_msg("Got an error when we shouldn't have\n"); + goto out; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + test_msg("Expected a real extent, got %llu\n", em->block_start); + goto out; + } + if (em->start != offset || em->len != 4096) { + test_msg("Unexpected extent wanted start %llu len 4096, got " + "start %llu len %llu\n", offset, em->start, em->len); + goto out; + } + if (em->flags != 0) { + test_msg("Unexpected flags set, want 0 have %lu\n", em->flags); + goto out; + } + if (em->orig_start != em->start) { + test_msg("Wrong orig offset, want %llu, have %llu\n", em->start, + em->orig_start); + goto out; + } + ret = 0; +out: + if (!IS_ERR(em)) + free_extent_map(em); + iput(inode); + free_dummy_root(root); + return ret; +} + +int btrfs_test_inodes(void) +{ + test_msg("Running btrfs_get_extent tests\n"); + return test_btrfs_get_extent(); +} -- 2.20.1