#include "ptlrpc_internal.h"
-/* should this take an imp_sem to ensure connect is single threaded? */
-int ptlrpc_connect_import(struct obd_import *imp)
+struct ptlrpc_connect_async_args {
+ __u64 pcaa_peer_committed;
+ int pcaa_initial_connect;
+ int pcaa_was_invalid;
+};
+
+/* A CLOSED import should remain so. */
+#define IMPORT_SET_STATE_NOLOCK(imp, state) \
+do { \
+ if (imp->imp_state != LUSTRE_IMP_CLOSED) { \
+ CDEBUG(D_HA, "%p %s: changing import state from %s to %s\n", \
+ imp, imp->imp_target_uuid.uuid, \
+ ptlrpc_import_state_name(imp->imp_state), \
+ ptlrpc_import_state_name(state)); \
+ imp->imp_state = state; \
+ } \
+} while(0)
+
+#define IMPORT_SET_STATE(imp, state) \
+do { \
+ unsigned long flags; \
+ \
+ spin_lock_irqsave(&imp->imp_lock, flags); \
+ IMPORT_SET_STATE_NOLOCK(imp, state); \
+ spin_unlock_irqrestore(&imp->imp_lock, flags); \
+} while(0)
+
+
+static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
+ void * data, int rc);
+int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
+
+/* Only this function is allowed to change the import state when it is
+ * CLOSED. I would rather refcount the import and free it after
+ * disconnection like we do with exports. To do that, the client_obd
+ * will need to save the peer info somewhere other than in the import,
+ * though. */
+int ptlrpc_init_import(struct obd_import *imp)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&imp->imp_lock, flags);
+
+ imp->imp_generation++;
+ imp->imp_state = LUSTRE_IMP_NEW;
+
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+
+ return 0;
+}
+
+/* Returns true if import was FULL, false if import was already not
+ * connected.
+ */
+int ptlrpc_set_import_discon(struct obd_import *imp)
+{
+ unsigned long flags;
+ int rc = 0;
+
+ spin_lock_irqsave(&imp->imp_lock, flags);
+
+ if (imp->imp_state == LUSTRE_IMP_FULL) {
+ IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
+ rc = 1;
+ } else {
+ CDEBUG(D_HA, "%p %s: import already not connected: %s\n",
+ imp,imp->imp_client->cli_name,
+ ptlrpc_import_state_name(imp->imp_state));
+ }
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+
+ return rc;
+}
+
+void ptlrpc_fail_import(struct obd_import *imp, int generation)
+{
+ ENTRY;
+
+ LASSERT (!imp->imp_dlm_fake);
+
+ if (ptlrpc_set_import_discon(imp))
+ ptlrpc_handle_failed_import(imp);
+
+ EXIT;
+}
+
+int ptlrpc_connect_import(struct obd_import *imp, char * new_uuid)
{
struct obd_device *obd = imp->imp_obd;
- int msg_flags;
int initial_connect = 0;
int rc;
__u64 committed_before_reconnect = 0;
+ int was_invalid = 0;
struct ptlrpc_request *request;
- struct lustre_handle old_hdl;
int size[] = {sizeof(imp->imp_target_uuid),
sizeof(obd->obd_uuid),
sizeof(imp->imp_dlm_handle)};
char *tmp[] = {imp->imp_target_uuid.uuid,
obd->obd_uuid.uuid,
(char *)&imp->imp_dlm_handle};
+ struct ptlrpc_connect_async_args *aa;
unsigned long flags;
spin_lock_irqsave(&imp->imp_lock, flags);
- if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
+ if (imp->imp_state == LUSTRE_IMP_CLOSED) {
spin_unlock_irqrestore(&imp->imp_lock, flags);
+ CERROR("can't connect to a closed import\n");
+ RETURN(-EINVAL);
+ } else if (imp->imp_state == LUSTRE_IMP_FULL) {
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+ CERROR("already connected\n");
+ RETURN(0);
+ } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+ CERROR("already connecting\n");
RETURN(-EALREADY);
- } else {
- LASSERT(imp->imp_state == LUSTRE_IMP_DISCON);
}
- CDEBUG(D_HA, "%s: new state: CONNECTING\n",
- imp->imp_client->cli_name);
- imp->imp_state = LUSTRE_IMP_CONNECTING;
+
+ IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
+
imp->imp_conn_cnt++;
+ imp->imp_last_replay_transno = 0;
+
if (imp->imp_remote_handle.cookie == 0) {
initial_connect = 1;
} else {
- committed_before_reconnect = imp->imp_peer_committed_transno;
+ committed_before_reconnect = imp->imp_peer_committed_transno;;
+
+ }
+
+ if (imp->imp_invalid) {
+ imp->imp_invalid = 0;
+ was_invalid = 1;
}
+
spin_unlock_irqrestore(&imp->imp_lock, flags);
+ if (new_uuid) {
+ struct ptlrpc_connection *conn;
+ struct obd_uuid uuid;
+ struct obd_export *dlmexp;
+
+ obd_str2uuid(&uuid, new_uuid);
+
+ conn = ptlrpc_uuid_to_connection(&uuid);
+ if (!conn)
+ GOTO(out, rc = -ENOENT);
+
+ CDEBUG(D_HA, "switching import %s/%s from %s to %s\n",
+ imp->imp_target_uuid.uuid, imp->imp_obd->obd_name,
+ imp->imp_connection->c_remote_uuid.uuid,
+ conn->c_remote_uuid.uuid);
+
+ /* Switch the import's connection and the DLM export's
+ * connection (which are almost certainly the same, but we
+ * keep distinct refs just to make things clearer. I think. */
+ if (imp->imp_connection)
+ ptlrpc_put_connection(imp->imp_connection);
+ /* We hand off the ref from ptlrpc_get_connection. */
+ imp->imp_connection = conn;
+
+ dlmexp = class_conn2export(&imp->imp_dlm_handle);
+
+ LASSERT(dlmexp != NULL);
+
+ if (dlmexp->exp_connection)
+ ptlrpc_put_connection(dlmexp->exp_connection);
+ dlmexp->exp_connection = ptlrpc_connection_addref(conn);
+ class_export_put(dlmexp);
+
+ }
+
request = ptlrpc_prep_req(imp, imp->imp_connect_op, 3, size, tmp);
if (!request)
GOTO(out, rc = -ENOMEM);
request->rq_send_state = LUSTRE_IMP_CONNECTING;
request->rq_replen = lustre_msg_size(0, NULL);
+ request->rq_interpret_reply = ptlrpc_connect_interpret;
+
+ LASSERT (sizeof (*aa) <= sizeof (request->rq_async_args));
+ aa = (struct ptlrpc_connect_async_args *)&request->rq_async_args;
+ memset(aa, 0, sizeof *aa);
- // lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_PEER);
+ aa->pcaa_peer_committed = committed_before_reconnect;
+ aa->pcaa_initial_connect = initial_connect;
+ aa->pcaa_was_invalid = was_invalid;
- rc = ptlrpc_queue_wait(request);
- if (rc) {
- GOTO(free_req, rc);
+ if (aa->pcaa_initial_connect)
+ imp->imp_replayable = 1;
+ ptlrpcd_add_req(request);
+ rc = 0;
+out:
+ if (rc != 0) {
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
+ }
+
+ RETURN(rc);
+}
+
+static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
+ void * data, int rc)
+{
+ struct ptlrpc_connect_async_args *aa = data;
+ struct obd_import *imp = request->rq_import;
+ struct lustre_handle old_hdl;
+ unsigned long flags;
+ int msg_flags;
+ ENTRY;
+
+ spin_lock_irqsave(&imp->imp_lock, flags);
+ if (imp->imp_state == LUSTRE_IMP_CLOSED) {
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+ RETURN(0);
}
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+
+ if (rc)
+ GOTO(out, rc);
msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
- if (initial_connect) {
- CDEBUG(D_HA, "%s: new state: FULL\n",
- imp->imp_client->cli_name);
- if (msg_flags & MSG_CONNECT_REPLAYABLE)
+ if (aa->pcaa_initial_connect) {
+ if (msg_flags & MSG_CONNECT_REPLAYABLE) {
+ CDEBUG(D_HA, "connected to replayable target: %s\n",
+ imp->imp_target_uuid.uuid);
imp->imp_replayable = 1;
+ ptlrpc_pinger_add_import(imp);
+ } else {
+ imp->imp_replayable = 0;
+ }
imp->imp_remote_handle = request->rq_repmsg->handle;
- imp->imp_state = LUSTRE_IMP_FULL;
- GOTO(free_req, rc = 0);
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
+ GOTO(finish, rc = 0);
}
/* Determine what recovery state to move the import to. */
", failed\n", imp->imp_target_uuid.uuid,
imp->imp_connection->c_remote_uuid.uuid,
imp->imp_dlm_handle.cookie);
- GOTO(free_req, rc = -ENOTCONN);
+ GOTO(out, rc = -ENOTCONN);
}
if (memcmp(&imp->imp_remote_handle, &request->rq_repmsg->handle,
imp->imp_target_uuid.uuid,
imp->imp_connection->c_remote_uuid.uuid);
}
- CDEBUG(D_HA, "%s: new state: RECOVER\n",
- imp->imp_client->cli_name);
- imp->imp_state = LUSTRE_IMP_RECOVER;
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
}
else if (MSG_CONNECT_RECOVERING & msg_flags) {
- CDEBUG(D_HA, "%s: new state: REPLAY\n",
- imp->imp_client->cli_name);
LASSERT(imp->imp_replayable);
imp->imp_state = LUSTRE_IMP_RECOVER;
imp->imp_remote_handle = request->rq_repmsg->handle;
- imp->imp_state = LUSTRE_IMP_REPLAY;
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
}
else {
- CDEBUG(D_HA, "%s: new state: EVICTED\n",
- imp->imp_client->cli_name);
imp->imp_remote_handle = request->rq_repmsg->handle;
- imp->imp_state = LUSTRE_IMP_EVICTED;
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
}
/* Sanity checks for a reconnected import. */
"after reconnect. We should LBUG right here.\n");
}
- if (request->rq_repmsg->last_committed < committed_before_reconnect) {
+ if (request->rq_repmsg->last_committed < aa->pcaa_peer_committed) {
CERROR("%s went back in time (transno "LPD64
" was previously committed, server now claims "LPD64
")! is shared storage not coherent?\n",
imp->imp_target_uuid.uuid,
- committed_before_reconnect,
+ aa->pcaa_peer_committed,
request->rq_repmsg->last_committed);
}
- free_req:
- ptlrpc_req_finished(request);
+finish:
+ rc = ptlrpc_import_recovery_state_machine(imp);
+ if (rc != 0) {
+ if (aa->pcaa_was_invalid) {
+ ptlrpc_set_import_active(imp, 0);
+ }
+ if (rc == -ENOTCONN) {
+ CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
+ "invalidating and reconnecting\n",
+ imp->imp_target_uuid.uuid,
+ imp->imp_connection->c_remote_uuid.uuid);
+ ptlrpc_connect_import(imp, NULL);
+ RETURN(0);
+ }
+ }
out:
- if (rc != 0)
- imp->imp_state = LUSTRE_IMP_DISCON;
+ if (rc != 0) {
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
+ if (aa->pcaa_initial_connect && !imp->imp_initial_recov)
+ GOTO(norecov, rc);
+ CDEBUG(D_ERROR,
+ "recovery of %s on %s failed (%d); restarting\n",
+ imp->imp_target_uuid.uuid,
+ (char *)imp->imp_connection->c_remote_uuid.uuid, rc);
+ ptlrpc_handle_failed_import(imp);
+ }
+
+norecov:
+ wake_up(&imp->imp_recovery_waitq);
RETURN(rc);
}
+static int completed_replay_interpret(struct ptlrpc_request *req,
+ void * data, int rc)
+{
+ atomic_dec(&req->rq_import->imp_replay_inflight);
+ ptlrpc_import_recovery_state_machine(req->rq_import);
+ RETURN(0);
+}
+
+static int signal_completed_replay(struct obd_import *imp)
+ {
+ struct ptlrpc_request *req;
+ ENTRY;
+
+ LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
+ atomic_inc(&imp->imp_replay_inflight);
+
+ req = ptlrpc_prep_req(imp, OBD_PING, 0, NULL, NULL);
+ if (!req)
+ RETURN(-ENOMEM);
+
+ req->rq_replen = lustre_msg_size(0, NULL);
+ req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
+ req->rq_reqmsg->flags |= MSG_LAST_REPLAY;
+ req->rq_timeout *= 3;
+ req->rq_interpret_reply = completed_replay_interpret;
+
+ ptlrpcd_add_req(req);
+ RETURN(0);
+}
+
+
+int ptlrpc_import_recovery_state_machine(struct obd_import *imp)
+{
+ int rc = 0;
+
+ if (imp->imp_state == LUSTRE_IMP_EVICTED) {
+ CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
+ imp->imp_target_uuid.uuid,
+ imp->imp_connection->c_remote_uuid.uuid);
+ ptlrpc_set_import_active(imp, 0);
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
+ }
+
+ if (imp->imp_state == LUSTRE_IMP_REPLAY) {
+ CDEBUG(D_HA, "replay requested by %s\n",
+ imp->imp_target_uuid.uuid);
+ rc = ptlrpc_replay_next(imp);
+ if (rc == 0 && atomic_read(&imp->imp_replay_inflight) == 0) {
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
+ rc = ldlm_replay_locks(imp);
+ if (rc)
+ GOTO(out, rc);
+ }
+ rc = 0;
+ }
+
+ if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
+ if (atomic_read(&imp->imp_replay_inflight) == 0) {
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
+ rc = signal_completed_replay(imp);
+ if (rc)
+ GOTO(out, rc);
+ }
+ }
+
+ if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
+ if (atomic_read(&imp->imp_replay_inflight) == 0) {
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
+ }
+ }
+
+ if (imp->imp_state == LUSTRE_IMP_RECOVER) {
+ CDEBUG(D_HA, "reconnected to %s@%s\n",
+ imp->imp_target_uuid.uuid,
+ imp->imp_connection->c_remote_uuid.uuid);
+
+ ptlrpc_set_import_active(imp, 1);
+ ptlrpc_resend(imp);
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
+ }
+
+ if (imp->imp_state == LUSTRE_IMP_FULL) {
+ wake_up(&imp->imp_recovery_waitq);
+ ptlrpc_wake_delayed(imp);
+ }
+
+ out:
+ RETURN(rc);
+}
+
+static int back_to_sleep(void *unused)
+{
+ return 0;
+}
int ptlrpc_disconnect_import(struct obd_import *imp)
{
struct ptlrpc_request *request;
int rq_opc;
int rc = 0;
+ unsigned long flags;
ENTRY;
switch (imp->imp_connect_op) {
RETURN(-EINVAL);
}
+
+ if (ptlrpc_import_in_recovery(imp)) {
+ struct l_wait_info lwi;
+ lwi = LWI_TIMEOUT_INTR(MAX(obd_timeout * HZ, 1), back_to_sleep,
+ NULL, NULL);
+ rc = l_wait_event(imp->imp_recovery_waitq,
+ !ptlrpc_import_in_recovery(imp), &lwi);
+
+ }
+
+ spin_lock_irqsave(&imp->imp_lock, flags);
+ if (imp->imp_state != LUSTRE_IMP_FULL) {
+ GOTO(out, 0);
+ }
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+
request = ptlrpc_prep_req(imp, rq_opc, 0, NULL, NULL);
if (request) {
/* For non-replayable connections, don't attempt
reconnect if this fails */
- if (!imp->imp_obd->obd_replayable) {
- imp->imp_state = LUSTRE_IMP_DISCON;
+ if (!imp->imp_replayable) {
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
request->rq_send_state = LUSTRE_IMP_DISCON;
}
request->rq_replen = lustre_msg_size(0, NULL);
ptlrpc_req_finished(request);
}
- imp->imp_state = LUSTRE_IMP_DISCON;
+ spin_lock_irqsave(&imp->imp_lock, flags);
+out:
+ IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
+ spin_unlock_irqrestore(&imp->imp_lock, flags);
+
RETURN(rc);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff