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| author | Yan, Zheng <zyan@redhat.com> | 2014-09-16 23:45:12 (GMT) |
|---|---|---|
| committer | Ilya Dryomov <idryomov@redhat.com> | 2014-10-14 17:03:39 (GMT) |
| commit | 6cd3bcad0d269f96667ea704d4f6459a5c6ccbab (patch) | |
| tree | b1b9f47e26f0553902803e7e58d23a0a3d3b5b0b /fs/ceph/mds_client.c | |
| parent | 508b32d8661b12da4c9ca41a9b2054e1dc92fa7e (diff) | |
| download | linux-6cd3bcad0d269f96667ea704d4f6459a5c6ccbab.tar.xz | |
ceph: move ceph_find_inode() outside the s_mutex
ceph_find_inode() may wait on freeing inode, using it inside the s_mutex
may cause deadlock. (the freeing inode is waiting for OSD read reply, but
dispatch thread is blocked by the s_mutex)
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Diffstat (limited to 'fs/ceph/mds_client.c')
| -rw-r--r-- | fs/ceph/mds_client.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index a17fc49..5edf206 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -2944,14 +2944,15 @@ static void handle_lease(struct ceph_mds_client *mdsc, if (dname.len != get_unaligned_le32(h+1)) goto bad; - mutex_lock(&session->s_mutex); - session->s_seq++; - /* lookup inode */ inode = ceph_find_inode(sb, vino); dout("handle_lease %s, ino %llx %p %.*s\n", ceph_lease_op_name(h->action), vino.ino, inode, dname.len, dname.name); + + mutex_lock(&session->s_mutex); + session->s_seq++; + if (inode == NULL) { dout("handle_lease no inode %llx\n", vino.ino); goto release; |