diff options
| author | Sage Weil <sage@inktank.com> | 2012-08-21 15:55:25 -0700 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2012-08-21 15:55:25 -0700 |
| commit | 6c5e50fa614fea5325a2973be06f7ec6f1055316 (patch) | |
| tree | 8732b96150e315ab711bfcccbaeef8b087af6e62 /fs/ceph | |
| parent | d1c338a509cea5378df59629ad47382810c38623 (diff) | |
| download | lwn-6c5e50fa614fea5325a2973be06f7ec6f1055316.tar.gz lwn-6c5e50fa614fea5325a2973be06f7ec6f1055316.zip | |
ceph: tolerate (and warn on) extraneous dentry from mds
If the MDS gives us a dentry and we weren't prepared to handle it,
WARN_ON_ONCE instead of crashing.
Reported-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/inode.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 9fff9f3b17e4..4b5762ef7c2b 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -992,11 +992,15 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, if (rinfo->head->is_dentry) { struct inode *dir = req->r_locked_dir; - err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, - session, req->r_request_started, -1, - &req->r_caps_reservation); - if (err < 0) - return err; + if (dir) { + err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, + session, req->r_request_started, -1, + &req->r_caps_reservation); + if (err < 0) + return err; + } else { + WARN_ON_ONCE(1); + } } /* @@ -1004,6 +1008,7 @@ int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req, * will have trouble splicing in the virtual snapdir later */ if (rinfo->head->is_dentry && !req->r_aborted && + req->r_locked_dir && (rinfo->head->is_target || strncmp(req->r_dentry->d_name.name, fsc->mount_options->snapdir_name, req->r_dentry->d_name.len))) { |