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authorSage Weil <sage@inktank.com>2012-08-21 15:55:25 -0700
committerSage Weil <sage@inktank.com>2012-08-21 15:55:25 -0700
commit6c5e50fa614fea5325a2973be06f7ec6f1055316 (patch)
tree8732b96150e315ab711bfcccbaeef8b087af6e62 /fs/ceph
parentd1c338a509cea5378df59629ad47382810c38623 (diff)
downloadlinux-6c5e50fa614fea5325a2973be06f7ec6f1055316.tar.bz2
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.c15
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))) {