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authorQu Wenruo <quwenruo@cn.fujitsu.com>2015-10-13 04:53:10 +0300
committerChris Mason <clm@fb.com>2015-10-22 04:41:10 +0300
commit56fa9d0762ed17153c1bdff3c0aeeecbe522b504 (patch)
tree8a71bc780898b0fd8a8504187dd78be09a3ff948 /fs/btrfs/qgroup.c
parent51773bec7ea352f3b9afa11ecfc72324c7977335 (diff)
downloadlinux-56fa9d0762ed17153c1bdff3c0aeeecbe522b504.tar.xz
btrfs: qgroup: Check if qgroup reserved space leaked
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>
Diffstat (limited to 'fs/btrfs/qgroup.c')
-rw-r--r--fs/btrfs/qgroup.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 879343c959d9..158633c9bbd9 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -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);
+}