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| author | Mark Fasheh <mark.fasheh@oracle.com> | 2006-09-08 14:22:54 -0700 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2006-09-24 13:50:45 -0700 |
| commit | 1ba9da2ffa54b56a6346746248bfa38124d499a6 (patch) | |
| tree | 51b25c65e92b6d2b3281d175e517cb5699e4b9ee | |
| parent | 349457ccf2592c14bdf13b6706170ae2e94931b1 (diff) | |
| download | linux-3.10-1ba9da2ffa54b56a6346746248bfa38124d499a6.tar.gz linux-3.10-1ba9da2ffa54b56a6346746248bfa38124d499a6.tar.bz2 linux-3.10-1ba9da2ffa54b56a6346746248bfa38124d499a6.zip | |
ocfs2: manually d_move() during ocfs2_rename()
Make use of FS_RENAME_DOES_D_MOVE to avoid a race condition that can occur
during ->rename() if we d_move() outside of the parent directory cluster
locks, and another node discovers the new name (created during the rename)
and unlinks it. d_move() will unconditionally rehash a dentry - which will
leave stale data in the system.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
| -rw-r--r-- | fs/ocfs2/dcache.c | 5 | ||||
| -rw-r--r-- | fs/ocfs2/super.c | 2 |
2 files changed, 5 insertions, 2 deletions
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c index 09efe240e65..18a31906316 100644 --- a/fs/ocfs2/dcache.c +++ b/fs/ocfs2/dcache.c @@ -414,7 +414,7 @@ void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target, * XXX: Is there any advantage to dropping the lock here? */ if (old_dir == new_dir) - return; + goto out_move; ocfs2_dentry_lock_put(osb, dentry->d_fsdata); @@ -423,6 +423,9 @@ void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target, OCFS2_I(new_dir)->ip_blkno, 0); if (ret) mlog_errno(ret); + +out_move: + d_move(dentry, target); } struct dentry_operations ocfs2_dentry_ops = { diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index d17e33e66a1..33a6de6fc61 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -682,7 +682,7 @@ static struct file_system_type ocfs2_fs_type = { .kill_sb = kill_block_super, /* set to the generic one * right now, but do we * need to change that? */ - .fs_flags = FS_REQUIRES_DEV, + .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, .next = NULL }; |