The patch titled
Subject: ocfs2: set filesytem read-only when ocfs2_delete_entry failed.
has been added to the -mm tree. Its filename is
ocfs2-set-filesytem-read-only-when-ocfs2_delete_entry-failed.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/ocfs2-set-filesytem-read-only-when-ocfs2_delete_entry-failed.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/ocfs2-set-filesytem-read-only-when-ocfs2_delete_entry-failed.patch
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From: jiangyiwen <jiangyiwen@xxxxxxxxxx>
Subject: ocfs2: set filesytem read-only when ocfs2_delete_entry failed.
In ocfs2_rename, it will lead to an inode with two entried(old and new) if
ocfs2_delete_entry(old) failed. Thus, filesystem will be inconsistent.
The case is described below:
ocfs2_rename
-> ocfs2_start_trans
-> ocfs2_add_entry(new)
-> ocfs2_delete_entry(old)
-> __ocfs2_journal_access *failed* because of -ENOMEM
-> ocfs2_commit_trans
So filesystem should be set to read-only at the moment.
Signed-off-by: Yiwen Jiang <jiangyiwen@xxxxxxxxxx>
Cc: Joseph Qi <joseph.qi@xxxxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Mark Fasheh <mfasheh@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/namei.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff -puN fs/ocfs2/namei.c~ocfs2-set-filesytem-read-only-when-ocfs2_delete_entry-failed fs/ocfs2/namei.c
--- a/fs/ocfs2/namei.c~ocfs2-set-filesytem-read-only-when-ocfs2_delete_entry-failed
+++ a/fs/ocfs2/namei.c
@@ -1551,12 +1551,21 @@ static int ocfs2_rename(struct inode *ol
status = ocfs2_find_entry(old_dentry->d_name.name,
old_dentry->d_name.len, old_dir,
&old_entry_lookup);
- if (status)
+ if (status) {
+ ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
+ "is not deleted.",
+ new_dentry->d_name.len, new_dentry->d_name.name,
+ old_dentry->d_name.len, old_dentry->d_name.name);
goto bail;
+ }
status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
if (status < 0) {
mlog_errno(status);
+ ocfs2_error(osb->sb, "new entry %.*s is added, but old entry %.*s "
+ "is not deleted.",
+ new_dentry->d_name.len, new_dentry->d_name.name,
+ old_dentry->d_name.len, old_dentry->d_name.name);
goto bail;
}
_
Patches currently in -mm which might be from jiangyiwen@xxxxxxxxxx are
origin.patch
ocfs2-set-filesytem-read-only-when-ocfs2_delete_entry-failed.patch
ocfs2-fix-a-tiny-case-that-inode-can-not-removed.patch
ocfs2-avoid-access-invalid-address-when-read-o2dlm-debug-messages.patch
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