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authorWengang Wang <wen.gang.wang@oracle.com>2011-07-12 16:43:14 +0800
committerJoel Becker <jlbec@evilplan.org>2011-11-17 01:46:46 -0800
commit8298524803339a9a8df053ebdfebc2975ec55be9 (patch)
tree2bea3c08eac9239ea596707fadfefed7f1bab2d7
parentfc9f899483435935c1cd7005df29681929d1c99b (diff)
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ocfs2: make direntry invalid when deleting it
When we deleting a direntry from a directory, if it's the first in a block we invalid it by setting inode to 0; otherwise, we merge the deleted one to the prior and contiguous direntry. And we don't truncate directories. There is a problem for the later case since inode is not set to 0. This problem happens when the caller passes a file position as parameter to ocfs2_dir_foreach_blk(). If the position happens to point to a stale(not the first, deleted in betweens of ocfs2_dir_foreach_blk()s) direntry, we are not able to recognize its staleness. So that we treat it as a live one wrongly. The fix is to set inode to 0 in both cases indicating the direntry is stale. This won't introduce additional IOs. Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com> Signed-off-by: Joel Becker <jlbec@evilplan.org>
-rw-r--r--fs/ocfs2/dir.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 8582e3f4f120..3302088e1f04 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -1184,8 +1184,7 @@ static int __ocfs2_delete_entry(handle_t *handle, struct inode *dir,
if (pde)
le16_add_cpu(&pde->rec_len,
le16_to_cpu(de->rec_len));
- else
- de->inode = 0;
+ de->inode = 0;
dir->i_version++;
ocfs2_journal_dirty(handle, bh);
goto bail;