* 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.
*
*/
char *tmp[] = {cli->cl_target_uuid, obd->obd_uuid };
struct ptlrpc_connection *conn = imp->imp_connection;
struct lustre_handle old_hdl;
- struct ptlrpc_request *request;
+ struct ptlrpc_request *request;
struct obd_export *ldlmexp;
int rc;
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;
}
int rc;
ENTRY;
- conn->c_level = LUSTRE_CONN_RECOVD;
-
argv[0] = obd_recovery_upcall;
argv[1] = conn->c_remote_uuid;
argv[2] = NULL;
RETURN(0);
}
-#define REPLAY_COMMITTED 0 /* Fully processed (commit + reply) */
-#define REPLAY_REPLAY 1 /* Forced-replay (e.g. open) */
-#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! */
-
-static int replay_state(struct ptlrpc_request *req, __u64 last_xid)
+int ptlrpc_replay(struct obd_import *imp, int send_last_flag)
{
- /* This request must always be replayed. */
- if (req->rq_flags & PTL_RPC_FL_REPLAY)
- return REPLAY_REPLAY;
+ int rc = 0;
+ struct list_head *tmp, *pos;
+ struct ptlrpc_request *req;
+ __u64 committed = imp->imp_peer_committed_transno;
+ ENTRY;
- /* Uncommitted request */
- if (req->rq_xid > last_xid) {
- if (req->rq_flags & PTL_RPC_FL_REPLIED) {
- /* Saw reply, so resend and ignore new reply. */
- return REPLAY_RESEND_IGNORE;
- }
+ /* It might have committed some after we last spoke, so make sure we
+ * get rid of them now.
+ */
+ spin_lock(&imp->imp_lock);
- /* Didn't see reply either, so resend. */
- return REPLAY_RESEND;
+ ptlrpc_free_committed(imp);
+
+ 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, &imp->imp_replay_list) {
+ req = list_entry(tmp, struct ptlrpc_request, rq_list);
+ DEBUG_REQ(D_HA, req, "RETAINED: ");
}
- /* This request has been committed and we saw the reply. Goodbye! */
- if (req->rq_flags & PTL_RPC_FL_REPLIED)
- return REPLAY_COMMITTED;
+ list_for_each_safe(tmp, pos, &imp->imp_replay_list) {
+ req = list_entry(tmp, struct ptlrpc_request, rq_list);
+
+ if (req->rq_transno == imp->imp_max_transno &&
+ send_last_flag) {
+ req->rq_reqmsg->flags |= MSG_LAST_REPLAY;
+ DEBUG_REQ(D_HA, req, "LAST_REPLAY:");
+ } else {
+ DEBUG_REQ(D_HA, req, "REPLAY:");
+ }
+
+ rc = ptlrpc_replay_req(req);
+ req->rq_reqmsg->flags &= ~MSG_LAST_REPLAY;
- /* Request committed, but we didn't see the reply: have to restart. */
- return REPLAY_RESTART;
+ if (rc) {
+ CERROR("recovery replay error %d for req %Ld\n",
+ rc, req->rq_xid);
+ GOTO(out, rc);
+ }
+ }
+
+ out:
+ spin_unlock(&imp->imp_lock);
+ return rc;
}
-static char *replay_state2str(int state) {
- static char *state_strings[] = {
- "COMMITTED", "REPLAY", "RESEND", "RESEND_IGNORE", "RESTART"
- };
- static char *unknown_state = "UNKNOWN";
+#define NO_RESEND 0 /* No action required. */
+#define RESEND 1 /* Resend required. */
+#define RESEND_IGNORE 2 /* Resend, ignore the reply (already saw it). */
+#define RESTART 3 /* Have to restart the call, sorry! */
- if (state < 0 ||
- state > (sizeof(state_strings) / sizeof(state_strings[0]))) {
- return unknown_state;
+static int resend_type(struct ptlrpc_request *req, __u64 committed)
+{
+ if (req->rq_transno < committed) {
+ if (req->rq_flags & PTL_RPC_FL_REPLIED) {
+ /* Saw the reply and it was committed, no biggie. */
+ DEBUG_REQ(D_HA, req, "NO_RESEND");
+ return NO_RESEND;
+ }
+ /* Request committed, but no reply: have to restart. */
+ return RESTART;
+ }
+
+ if (req->rq_flags & PTL_RPC_FL_REPLIED) {
+ /* Saw reply, so resend and ignore new reply. */
+ return RESEND_IGNORE;
}
- return state_strings[state];
+ /* Didn't see reply either, so resend. */
+ return RESEND;
+
}
-int ptlrpc_replay(struct ptlrpc_connection *conn)
+int ptlrpc_resend(struct obd_import *imp)
{
int rc = 0;
struct list_head *tmp, *pos;
struct ptlrpc_request *req;
- ENTRY;
-
- spin_lock(&conn->c_lock);
+ __u64 committed = imp->imp_peer_committed_transno;
- CDEBUG(D_HA, "connection %p to %s has last_xid "LPD64"\n",
- conn, conn->c_remote_uuid, conn->c_last_xid);
+ ENTRY;
- list_for_each(tmp, &conn->c_sending_head) {
- int state;
+ spin_lock(&imp->imp_lock);
+ list_for_each(tmp, &imp->imp_sending_list) {
req = list_entry(tmp, struct ptlrpc_request, rq_list);
- state = replay_state(req, conn->c_last_xid);
- DEBUG_REQ(D_HA, req, "SENDING: %s: ", replay_state2str(state));
+ DEBUG_REQ(D_HA, req, "SENDING: ");
}
- list_for_each(tmp, &conn->c_delayed_head) {
- int state;
+ list_for_each_safe(tmp, pos, &imp->imp_sending_list) {
req = list_entry(tmp, struct ptlrpc_request, rq_list);
- state = replay_state(req, conn->c_last_xid);
- DEBUG_REQ(D_HA, req, "DELAYED: ");
- }
- list_for_each_safe(tmp, pos, &conn->c_sending_head) {
- req = list_entry(tmp, struct ptlrpc_request, rq_list);
-
- switch (replay_state(req, conn->c_last_xid)) {
- case REPLAY_REPLAY:
- DEBUG_REQ(D_HA, req, "REPLAY:");
- rc = ptlrpc_replay_req(req);
-#if 0
-#error We should not hold a spinlock over such a lengthy operation.
-#error If necessary, drop spinlock, do operation, re-get spinlock, restart loop.
-#error If we need to avoid re-processint items, then delete them from the list
-#error as they are replayed and re-add at the tail of this list, so the next
-#error item to process will always be at the head of the list.
-#endif
- if (rc) {
- CERROR("recovery replay error %d for req %Ld\n",
- rc, req->rq_xid);
- GOTO(out, rc);
- }
+ switch(resend_type(req, committed)) {
+ case NO_RESEND:
break;
-
- case REPLAY_COMMITTED:
- DEBUG_REQ(D_HA, req, "COMMITTED:");
- /* XXX commit now? */
+ case RESTART:
+ DEBUG_REQ(D_HA, req, "RESTART:");
+ ptlrpc_restart_req(req);
break;
- case REPLAY_RESEND_IGNORE:
+ case RESEND_IGNORE:
DEBUG_REQ(D_HA, req, "RESEND_IGNORE:");
- rc = ptlrpc_replay_req(req);
+ rc = ptlrpc_replay_req(req);
if (rc) {
- CERROR("request resend error %d for req %Ld\n",
- rc, req->rq_xid);
- GOTO(out, rc);
+ DEBUG_REQ(D_ERROR, req, "error %d resending:",
+ rc);
+ ptlrpc_restart_req(req); /* might as well */
}
break;
- case REPLAY_RESTART:
- DEBUG_REQ(D_HA, req, "RESTART:");
- ptlrpc_restart_req(req);
- break;
-
- case REPLAY_RESEND:
+ case RESEND:
DEBUG_REQ(D_HA, req, "RESEND:");
ptlrpc_resend_req(req);
break;
default:
LBUG();
}
-
}
- conn->c_level = LUSTRE_CONN_FULL;
- recovd_conn_fixed(conn);
+ RETURN(rc);
+}
- CERROR("recovery complete on conn %p(%s), waking delayed reqs\n",
- conn, conn->c_remote_uuid);
- /* Finally, continue processing requests that blocked for recovery. */
- list_for_each_safe(tmp, pos, &conn->c_delayed_head) {
+void ptlrpc_wake_delayed(struct obd_import *imp)
+{
+ struct list_head *tmp, *pos;
+ struct ptlrpc_request *req;
+
+ spin_lock(&imp->imp_lock);
+ list_for_each_safe(tmp, pos, &imp->imp_delayed_list) {
req = list_entry(tmp, struct ptlrpc_request, rq_list);
- DEBUG_REQ(D_HA, req, "WAKING: ");
- ptlrpc_continue_req(req);
+ DEBUG_REQ(D_HA, req, "waking:");
+ wake_up(&req->rq_wait_for_rep);
}
-
- EXIT;
- out:
- spin_unlock(&conn->c_lock);
- return rc;
+ spin_unlock(&imp->imp_lock);
}