* This code is issued under the GNU General Public License.
* See the file COPYING in this distribution
*
- * Copryright (C) 1996 Peter J. Braam <braam@stelias.com>
- * Copryright (C) 1999 Stelias Computing Inc. <braam@stelias.com>
- * Copryright (C) 1999 Seagate Technology Inc.
- * Copryright (C) 2001 Mountain View Data, Inc.
- * Copryright (C) 2002 Cluster File Systems, Inc.
+ * Copyright (C) 1996 Peter J. Braam <braam@stelias.com>
+ * Copyright (C) 1999 Stelias Computing Inc. <braam@stelias.com>
+ * Copyright (C) 1999 Seagate Technology Inc.
+ * Copyright (C) 2001 Mountain View Data, Inc.
+ * Copyright (C) 2002 Cluster File Systems, Inc.
*
*/
request->rq_level = LUSTRE_CONN_NEW;
request->rq_replen = lustre_msg_size(0, NULL);
/*
-
* This address is the export that represents our client-side LDLM
* service (for ASTs). We should only have one on this list, so we
* just grab the first one.
request->rq_reqmsg->addr = (__u64)(unsigned long)ldlmexp;
request->rq_reqmsg->cookie = ldlmexp->exp_cookie;
rc = ptlrpc_queue_wait(request);
- rc = ptlrpc_check_status(request, rc);
- if (rc) {
+ switch (rc) {
+ case EALREADY:
+ case -EALREADY:
+ /* already connected! */
+ memset(&old_hdl, 0, sizeof(old_hdl));
+ if (!memcmp(&old_hdl.addr, &request->rq_repmsg->addr,
+ sizeof (old_hdl.addr)) &&
+ !memcmp(&old_hdl.cookie, &request->rq_repmsg->cookie,
+ sizeof (old_hdl.cookie))) {
+ CERROR("%s@%s didn't like our handle %Lx/%Lx, failed\n",
+ cli->cl_target_uuid, conn->c_remote_uuid,
+ (__u64)(unsigned long)ldlmexp,
+ ldlmexp->exp_cookie);
+ GOTO(out_disc, rc = -ENOTCONN);
+ }
+
+ old_hdl.addr = request->rq_repmsg->addr;
+ old_hdl.cookie = request->rq_repmsg->cookie;
+ if (memcmp(&imp->imp_handle, &old_hdl, sizeof(old_hdl))) {
+ CERROR("%s@%s changed handle from %Lx/%Lx to %Lx/%Lx; "
+ "copying, but this may foreshadow disaster\n",
+ cli->cl_target_uuid, conn->c_remote_uuid,
+ old_hdl.addr, old_hdl.cookie,
+ imp->imp_handle.addr, imp->imp_handle.cookie);
+ imp->imp_handle.addr = request->rq_repmsg->addr;
+ imp->imp_handle.cookie = request->rq_repmsg->cookie;
+ GOTO(out_disc, rc = EALREADY);
+ }
+
+ CERROR("reconnected to %s@%s after partition\n",
+ cli->cl_target_uuid, conn->c_remote_uuid);
+ GOTO(out_disc, rc = EALREADY);
+ case 0:
+ old_hdl = imp->imp_handle;
+ imp->imp_handle.addr = request->rq_repmsg->addr;
+ imp->imp_handle.cookie = request->rq_repmsg->cookie;
+ CERROR("now connected to %s@%s (%Lx/%Lx, was %Lx/%Lx)!\n",
+ cli->cl_target_uuid, conn->c_remote_uuid,
+ imp->imp_handle.addr, imp->imp_handle.cookie,
+ old_hdl.addr, old_hdl.cookie);
+ GOTO(out_disc, rc = 0);
+ default:
CERROR("cannot connect to %s@%s: rc = %d\n",
cli->cl_target_uuid, conn->c_remote_uuid, rc);
- ptlrpc_free_req(request);
- GOTO(out_disc, rc = -ENOTCONN);
+ GOTO(out_disc, rc = -ENOTCONN); /* XXX preserve rc? */
}
-
- old_hdl = imp->imp_handle;
- imp->imp_handle.addr = request->rq_repmsg->addr;
- imp->imp_handle.cookie = request->rq_repmsg->cookie;
- CERROR("reconnected to %s@%s (%Lx/%Lx, was %Lx/%Lx)!\n",
- cli->cl_target_uuid, conn->c_remote_uuid,
- imp->imp_handle.addr, imp->imp_handle.cookie,
- old_hdl.addr, old_hdl.cookie);
- ptlrpc_req_finished(request);
out_disc:
+ ptlrpc_req_finished(request);
return rc;
}
#define REPLAY_RESEND 2 /* Resend required. */
#define REPLAY_RESEND_IGNORE 3 /* Resend, ignore the reply (already saw it). */
#define REPLAY_RESTART 4 /* Have to restart the call, sorry! */
-#define REPLAY_NO_STATE 5 /* Request doesn't change MDS state: skip. */
-static int replay_state(struct ptlrpc_request *req, __u64 last_xid)
+static int replay_state(struct ptlrpc_request *req, __u64 committed)
{
/* This request must always be replayed. */
if (req->rq_flags & PTL_RPC_FL_REPLAY)
return REPLAY_REPLAY;
/* Uncommitted request */
- if (req->rq_xid > last_xid) {
+ if (req->rq_transno > committed) {
if (req->rq_flags & PTL_RPC_FL_REPLIED) {
- if (req->rq_transno == 0) {
- /* If no transno was returned, no state was
- altered on the MDS. */
- return REPLAY_NO_STATE;
- }
-
/* Saw reply, so resend and ignore new reply. */
return REPLAY_RESEND_IGNORE;
}
static char *replay_state2str(int state) {
static char *state_strings[] = {
"COMMITTED", "REPLAY", "RESEND", "RESEND_IGNORE", "RESTART",
- "NO_STATE"
};
static char *unknown_state = "UNKNOWN";
return state_strings[state];
}
-int ptlrpc_replay(struct ptlrpc_connection *conn)
+int ptlrpc_replay(struct obd_import *imp, int unreplied_only)
{
- int rc = 0;
+ int rc = 0, state;
struct list_head *tmp, *pos;
struct ptlrpc_request *req;
+ struct ptlrpc_connection *conn = imp->imp_connection;
+ __u64 committed = imp->imp_peer_committed_transno;
ENTRY;
- spin_lock(&conn->c_lock);
+ spin_lock(&imp->imp_lock);
- CDEBUG(D_HA, "connection %p to %s has last_xid "LPD64"\n",
- conn, conn->c_remote_uuid, conn->c_last_xid);
+ CDEBUG(D_HA, "import %p from %s has committed "LPD64"\n",
+ imp, imp->imp_obd->u.cli.cl_target_uuid, committed);
- list_for_each(tmp, &conn->c_sending_head) {
- int state;
+ list_for_each(tmp, &imp->imp_request_list) {
req = list_entry(tmp, struct ptlrpc_request, rq_list);
- state = replay_state(req, conn->c_last_xid);
+ state = replay_state(req, committed);
DEBUG_REQ(D_HA, req, "SENDING: %s: ", replay_state2str(state));
}
list_for_each(tmp, &conn->c_delayed_head) {
- int state;
req = list_entry(tmp, struct ptlrpc_request, rq_list);
- state = replay_state(req, conn->c_last_xid);
- DEBUG_REQ(D_HA, req, "DELAYED: ");
+ state = replay_state(req, committed);
+ DEBUG_REQ(D_HA, req, "DELAYED: %s: ", replay_state2str(state));
}
- list_for_each_safe(tmp, pos, &conn->c_sending_head) {
+ list_for_each_safe(tmp, pos, &imp->imp_request_list) {
req = list_entry(tmp, struct ptlrpc_request, rq_list);
-
- switch (replay_state(req, conn->c_last_xid)) {
+
+ if (unreplied_only) {
+ if (!(req->rq_flags & PTL_RPC_FL_REPLIED)) {
+ DEBUG_REQ(D_HA, req, "UNREPLIED:");
+ ptlrpc_restart_req(req);
+ }
+ continue;
+ }
+
+ state = replay_state(req, committed);
+
+ if (req->rq_transno == imp->imp_max_transno) {
+ req->rq_reqmsg->flags |= MSG_LAST_REPLAY;
+ DEBUG_REQ(D_HA, req, "last for replay");
+ LASSERT(state != REPLAY_COMMITTED);
+ }
+
+ switch (state) {
case REPLAY_REPLAY:
DEBUG_REQ(D_HA, req, "REPLAY:");
rc = ptlrpc_replay_req(req);
}
break;
-
case REPLAY_COMMITTED:
- DEBUG_REQ(D_HA, req, "COMMITTED:");
- /* XXX commit now? */
- break;
-
- case REPLAY_NO_STATE:
- DEBUG_REQ(D_HA, req, "NO_STATE:");
+ DEBUG_REQ(D_ERROR, req, "COMMITTED:");
/* XXX commit now? */
break;