diff options
| author | Yan, Zheng <zheng.z.yan@intel.com> | 2012-11-19 10:49:06 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-17 08:51:21 -0800 |
| commit | 42d519d12ef2d43a83b86cd2931c539045d07059 (patch) | |
| tree | 684fc58b0dfb653ed59707404d96ac476b59e877 | |
| parent | 7ae7b557aaaf1d50f04706b775341957f12bab10 (diff) | |
ceph: Fix infinite loop in __wake_requests
__wake_requests() will enter infinite loop if we use it to wake
requests in the session->s_waiting list. __wake_requests() deletes
requests from the list and __do_request() adds requests back to
the list.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Sage Weil <sage@inktank.com>
(cherry picked from commit ed75ec2cd19b47efcd292b6e23f58e56f4c5bc34)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/ceph/mds_client.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 95708dd092f1..3fd08ad5c478 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1886,9 +1886,14 @@ finish: static void __wake_requests(struct ceph_mds_client *mdsc, struct list_head *head) { - struct ceph_mds_request *req, *nreq; + struct ceph_mds_request *req; + LIST_HEAD(tmp_list); + + list_splice_init(head, &tmp_list); - list_for_each_entry_safe(req, nreq, head, r_wait) { + while (!list_empty(&tmp_list)) { + req = list_entry(tmp_list.next, + struct ceph_mds_request, r_wait); list_del_init(&req->r_wait); __do_request(mdsc, req); } |