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Btrfs: add sanity test for outstanding_extents accounting

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I introduced a regression wrt outstanding_extents accounting.  These are tricky
areas that aren't easily covered by xfstests as we could change MAX_EXTENT_SIZE
at any time.  So add sanity tests to cover the various conditions that are
tricky in order to make sure we don't introduce regressions in the future.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Josef Bacik
2015-03-16 17:38:52 -04:00
parent bcb7e449ec
commit 6a3891c551
4 changed files with 217 additions and 1 deletions
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15
fs/btrfs/inode.c
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@@ -108,6 +108,13 @@ static struct extent_map *create_pinned_em(struct inode *inode, u64 start,
static int btrfs_dirty_inode(struct inode *inode);
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_inode_set_ops(struct inode *inode)
{
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
#endif
static int btrfs_init_inode_security(struct btrfs_trans_handle *trans,
struct inode *inode, struct inode *dir,
const struct qstr *qstr)
@@ -1694,6 +1701,10 @@ static void btrfs_set_bit_hook(struct inode *inode,
spin_unlock(&BTRFS_I(inode)->lock);
}
/* For sanity tests */
if (btrfs_test_is_dummy_root(root))
return;
__percpu_counter_add(&root->fs_info->delalloc_bytes, len,
root->fs_info->delalloc_batch);
spin_lock(&BTRFS_I(inode)->lock);
@@ -1749,6 +1760,10 @@ static void btrfs_clear_bit_hook(struct inode *inode,
root != root->fs_info->tree_root)
btrfs_delalloc_release_metadata(inode, len);
/* For sanity tests. */
if (btrfs_test_is_dummy_root(root))
return;
if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID
&& do_list && !(state->state & EXTENT_NORESERVE))
btrfs_free_reserved_data_space(inode, len);