diff options
Diffstat (limited to 'fs/ceph/mds_client.c')
| -rw-r--r-- | fs/ceph/mds_client.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index b3b19f0..c0568fe 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1181,6 +1181,7 @@ ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode) if (!req) return ERR_PTR(-ENOMEM); + mutex_init(&req->r_fill_mutex); req->r_started = jiffies; req->r_resend_mds = -1; INIT_LIST_HEAD(&req->r_unsafe_dir_item); @@ -1715,8 +1716,16 @@ int ceph_mdsc_do_request(struct ceph_mds_client *mdsc, err = le32_to_cpu(req->r_reply_info.head->result); } else if (err < 0) { dout("aborted request %lld with %d\n", req->r_tid, err); + + /* + * ensure we aren't running concurrently with + * ceph_fill_trace or ceph_readdir_prepopulate, which + * rely on locks (dir mutex) held by our caller. + */ + mutex_lock(&req->r_fill_mutex); req->r_err = err; req->r_aborted = true; + mutex_unlock(&req->r_fill_mutex); if (req->r_locked_dir && (req->r_op & CEPH_MDS_OP_WRITE)) { @@ -1861,12 +1870,14 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) } /* insert trace into our cache */ + mutex_lock(&req->r_fill_mutex); err = ceph_fill_trace(mdsc->client->sb, req, req->r_session); if (err == 0) { if (result == 0 && rinfo->dir_nr) ceph_readdir_prepopulate(req, req->r_session); ceph_unreserve_caps(&req->r_caps_reservation); } + mutex_unlock(&req->r_fill_mutex); up_read(&mdsc->snap_rwsem); out_err: |