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btrfs: qgroup: Check if qgroup reserved space leaked

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Add check at btrfs_destroy_inode() time to detect qgroup reserved space
leak.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Qu Wenruo 2015-10-13 09:53:10 +08:00 committed by Chris Mason
parent 51773bec7e
commit 56fa9d0762
3 changed files with 34 additions and 0 deletions
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1
fs/btrfs/inode.c
View file

@ -9108,6 +9108,7 @@ void btrfs_destroy_inode(struct inode *inode)
btrfs_put_ordered_extent(ordered);
}
}
btrfs_qgroup_check_reserved_leak(inode);
inode_tree_del(inode);
btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
free:

32
fs/btrfs/qgroup.c
View file

@ -2645,3 +2645,35 @@ void btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes)
atomic_sub(num_bytes, &root->qgroup_meta_rsv);
qgroup_free(root, num_bytes);
}
/*
* Check qgroup reserved space leaking, normally at destory inode
* time
*/
void btrfs_qgroup_check_reserved_leak(struct inode *inode)
{
struct extent_changeset changeset;
struct ulist_node *unode;
struct ulist_iterator iter;
int ret;
changeset.bytes_changed = 0;
changeset.range_changed = ulist_alloc(GFP_NOFS);
if (WARN_ON(!changeset.range_changed))
return;
ret = clear_record_extent_bits(&BTRFS_I(inode)->io_tree, 0, (u64)-1,
EXTENT_QGROUP_RESERVED, GFP_NOFS, &changeset);
WARN_ON(ret < 0);
if (WARN_ON(changeset.bytes_changed)) {
ULIST_ITER_INIT(&iter);
while ((unode = ulist_next(changeset.range_changed, &iter))) {
btrfs_warn(BTRFS_I(inode)->root->fs_info,
"leaking qgroup reserved space, ino: %lu, start: %llu, end: %llu",
inode->i_ino, unode->val, unode->aux);
}
qgroup_free(BTRFS_I(inode)->root, changeset.bytes_changed);
}
ulist_free(changeset.range_changed);
}

1
fs/btrfs/qgroup.h
View file

@ -105,4 +105,5 @@ int btrfs_qgroup_free_data(struct inode *inode, u64 start, u64 len);
int btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes);
void btrfs_qgroup_free_meta_all(struct btrfs_root *root);
void btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes);
void btrfs_qgroup_check_reserved_leak(struct inode *inode);
#endif /* __BTRFS_QGROUP__ */