diff options
| author |   Sage Weil <sage@inktank.com> | 2013-02-05 13:41:23 -0800 |
|---|---|---|
| committer |   Yan, Zheng <zheng.z.yan@intel.com> | 2014-04-03 10:33:53 +0800 |
| commit | 4b58c9b19bddb47a1961608bc62d0c2f3dc9705e (patch) | |
| tree | 41a7b687f380b397d379883295a6994e098583b5 /fs/ceph | |
| parent | ceph: do not assume r_old_dentry[_dir] always set together (diff) | |
| download | linux-dev-4b58c9b19bddb47a1961608bc62d0c2f3dc9705e.tar.xz linux-dev-4b58c9b19bddb47a1961608bc62d0c2f3dc9705e.zip | |
ceph: do not set r_old_dentry_dir on link()
This is racy--we do not know whather d_parent has changed out from
underneath us because i_mutex is not held on the source inode's directory.
Also, taking this reference is useless.
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/dir.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index e07973718ebe..ff2864a36a1c 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -812,8 +812,7 @@ static int ceph_link(struct dentry *old_dentry, struct inode *dir, } req->r_dentry = dget(dentry); req->r_num_caps = 2; - req->r_old_dentry = dget(old_dentry); /* or inode? hrm. */ - req->r_old_dentry_dir = ceph_get_dentry_parent_inode(old_dentry); + req->r_old_dentry = dget(old_dentry); req->r_locked_dir = dir; req->r_dentry_drop = CEPH_CAP_FILE_SHARED; req->r_dentry_unless = CEPH_CAP_FILE_EXCL; |