diff options
| -rw-r--r-- | fs/ceph/mds_client.c | 41 | ||||
| -rw-r--r-- | fs/ceph/mds_client.h | 2 |
2 files changed, 35 insertions, 8 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index a546e0ddb8e..34d215ff4c8 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1628,6 +1628,15 @@ static int __prepare_send_request(struct ceph_mds_client *mdsc, req->r_mds = mds; req->r_attempts++; + if (req->r_inode) { + struct ceph_cap *cap = + ceph_get_cap_for_mds(ceph_inode(req->r_inode), mds); + + if (cap) + req->r_sent_on_mseq = cap->mseq; + else + req->r_sent_on_mseq = -1; + } dout("prepare_send_request %p tid %lld %s (attempt %d)\n", req, req->r_tid, ceph_mds_op_name(req->r_op), req->r_attempts); @@ -1962,21 +1971,39 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) result = le32_to_cpu(head->result); /* - * Tolerate 2 consecutive ESTALEs from the same mds. - * FIXME: we should be looking at the cap migrate_seq. + * Handle an ESTALE + * if we're not talking to the authority, send to them + * if the authority has changed while we weren't looking, + * send to new authority + * Otherwise we just have to return an ESTALE */ if (result == -ESTALE) { - req->r_direct_mode = USE_AUTH_MDS; - req->r_num_stale++; - if (req->r_num_stale <= 2) { + dout("got ESTALE on request %llu", req->r_tid); + if (!req->r_inode) ; //do nothing; not an authority problem + else if (req->r_direct_mode != USE_AUTH_MDS) { + dout("not using auth, setting for that now"); + req->r_direct_mode = USE_AUTH_MDS; __do_request(mdsc, req); mutex_unlock(&mdsc->mutex); goto out; + } else { + struct ceph_inode_info *ci = ceph_inode(req->r_inode); + struct ceph_cap *cap = + ceph_get_cap_for_mds(ci, req->r_mds);; + + dout("already using auth"); + if ((!cap || cap != ci->i_auth_cap) || + (cap->mseq != req->r_sent_on_mseq)) { + dout("but cap changed, so resending"); + __do_request(mdsc, req); + mutex_unlock(&mdsc->mutex); + goto out; + } } - } else { - req->r_num_stale = 0; + dout("have to return ESTALE on request %llu", req->r_tid); } + if (head->safe) { req->r_got_safe = true; __unregister_request(mdsc, req); diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index c86be30e870..ab7e89f5e34 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -208,8 +208,8 @@ struct ceph_mds_request { int r_attempts; /* resend attempts */ int r_num_fwd; /* number of forward attempts */ - int r_num_stale; int r_resend_mds; /* mds to resend to next, if any*/ + u32 r_sent_on_mseq; /* cap mseq request was sent at*/ struct kref r_kref; struct list_head r_wait; |