/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
- * Author: Mike Shaver <shaver@clusterfs.com>
+ * GPL HEADER START
*
- * This file is part of Lustre, http://www.lustre.org.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/ptlrpc/import.c
+ *
+ * Author: Mike Shaver <shaver@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_RPC
# include <liblustre.h>
#endif
-#include <linux/obd_support.h>
-#include <linux/lustre_ha.h>
-#include <linux/lustre_net.h>
-#include <linux/lustre_import.h>
-#include <linux/lustre_export.h>
-#include <linux/obd.h>
-#include <linux/obd_class.h>
-#include <linux/lustre_sec.h>
+#include <obd_support.h>
+#include <lustre_ha.h>
+#include <lustre_net.h>
+#include <lustre_import.h>
+#include <lustre_export.h>
+#include <obd.h>
+#include <obd_cksum.h>
+#include <obd_class.h>
#include "ptlrpc_internal.h"
int pcaa_initial_connect;
};
+static void __import_set_state(struct obd_import *imp,
+ enum lustre_imp_state state)
+{
+ imp->imp_state = state;
+ imp->imp_state_hist[imp->imp_state_hist_idx].ish_state = state;
+ imp->imp_state_hist[imp->imp_state_hist_idx].ish_time =
+ cfs_time_current_sec();
+ imp->imp_state_hist_idx = (imp->imp_state_hist_idx + 1) %
+ IMP_STATE_HIST_LEN;
+}
+
/* 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, \
+ imp, obd2cli_tgt(imp->imp_obd), \
ptlrpc_import_state_name(imp->imp_state), \
ptlrpc_import_state_name(state)); \
- imp->imp_state = state; \
+ __import_set_state(imp, 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); \
+#define IMPORT_SET_STATE(imp, state) \
+do { \
+ cfs_spin_lock(&imp->imp_lock); \
+ IMPORT_SET_STATE_NOLOCK(imp, state); \
+ cfs_spin_unlock(&imp->imp_lock); \
} while(0)
-static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
+static int ptlrpc_connect_interpret(const struct lu_env *env,
+ struct ptlrpc_request *request,
void * data, int rc);
int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
* though. */
int ptlrpc_init_import(struct obd_import *imp)
{
- unsigned long flags;
-
- spin_lock_irqsave(&imp->imp_lock, flags);
+ cfs_spin_lock(&imp->imp_lock);
imp->imp_generation++;
imp->imp_state = LUSTRE_IMP_NEW;
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ cfs_spin_unlock(&imp->imp_lock);
return 0;
}
+EXPORT_SYMBOL(ptlrpc_init_import);
+
+#define UUID_STR "_UUID"
+static void deuuidify(char *uuid, const char *prefix, char **uuid_start,
+ int *uuid_len)
+{
+ *uuid_start = !prefix || strncmp(uuid, prefix, strlen(prefix))
+ ? uuid : uuid + strlen(prefix);
+
+ *uuid_len = strlen(*uuid_start);
+
+ if (*uuid_len < strlen(UUID_STR))
+ return;
+
+ if (!strncmp(*uuid_start + *uuid_len - strlen(UUID_STR),
+ UUID_STR, strlen(UUID_STR)))
+ *uuid_len -= strlen(UUID_STR);
+}
/* Returns true if import was FULL, false if import was already not
* connected.
+ * @imp - import to be disconnected
+ * @conn_cnt - connection count (epoch) of the request that timed out
+ * and caused the disconnection. In some cases, multiple
+ * inflight requests can fail to a single target (e.g. OST
+ * bulk requests) and if one has already caused a reconnection
+ * (increasing the import->conn_cnt) the older failure should
+ * not also cause a reconnection. If zero it forces a reconnect.
*/
-int ptlrpc_set_import_discon(struct obd_import *imp)
+int ptlrpc_set_import_discon(struct obd_import *imp, __u32 conn_cnt)
{
- unsigned long flags;
int rc = 0;
- spin_lock_irqsave(&imp->imp_lock, flags);
+ cfs_spin_lock(&imp->imp_lock);
- if (imp->imp_state == LUSTRE_IMP_FULL) {
- CWARN("%s: connection lost to %s@%s\n",
- imp->imp_obd->obd_name,
- imp->imp_target_uuid.uuid,
- imp->imp_connection->c_remote_uuid.uuid);
- ptlrpc_deactivate_timeouts();
+ if (imp->imp_state == LUSTRE_IMP_FULL &&
+ (conn_cnt == 0 || conn_cnt == imp->imp_conn_cnt)) {
+ char *target_start;
+ int target_len;
+
+ deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
+ &target_start, &target_len);
+
+ if (imp->imp_replayable) {
+ LCONSOLE_WARN("%s: Connection to service %.*s via nid "
+ "%s was lost; in progress operations using this "
+ "service will wait for recovery to complete.\n",
+ imp->imp_obd->obd_name, target_len, target_start,
+ libcfs_nid2str(imp->imp_connection->c_peer.nid));
+ } else {
+ LCONSOLE_ERROR_MSG(0x166, "%s: Connection to service "
+ "%.*s via nid %s was lost; in progress "
+ "operations using this service will fail.\n",
+ imp->imp_obd->obd_name,
+ target_len, target_start,
+ libcfs_nid2str(imp->imp_connection->c_peer.nid));
+ }
+ ptlrpc_deactivate_timeouts(imp);
IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ cfs_spin_unlock(&imp->imp_lock);
+
+ if (obd_dump_on_timeout)
+ libcfs_debug_dumplog();
+
obd_import_event(imp->imp_obd, imp, IMP_EVENT_DISCON);
rc = 1;
} else {
- spin_unlock_irqrestore(&imp->imp_lock, flags);
- CDEBUG(D_HA, "%p %s: import already not connected: %s\n",
- imp,imp->imp_client->cli_name,
- ptlrpc_import_state_name(imp->imp_state));
+ cfs_spin_unlock(&imp->imp_lock);
+ CDEBUG(D_HA, "%s: import %p already %s (conn %u, was %u): %s\n",
+ imp->imp_client->cli_name, imp,
+ (imp->imp_state == LUSTRE_IMP_FULL &&
+ imp->imp_conn_cnt > conn_cnt) ?
+ "reconnected" : "not connected", imp->imp_conn_cnt,
+ conn_cnt, ptlrpc_import_state_name(imp->imp_state));
}
return rc;
}
-/*
- * This acts as a barrier; all existing requests are rejected, and
- * no new requests will be accepted until the import is valid again.
- */
-void ptlrpc_deactivate_import(struct obd_import *imp)
+/* Must be called with imp_lock held! */
+static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp)
{
- unsigned long flags;
ENTRY;
+ LASSERT_SPIN_LOCKED(&imp->imp_lock);
- spin_lock_irqsave(&imp->imp_lock, flags);
- CDEBUG(D_HA, "setting import %s INVALID\n",
- imp->imp_target_uuid.uuid);
+ CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd));
imp->imp_invalid = 1;
imp->imp_generation++;
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ cfs_spin_unlock(&imp->imp_lock);
ptlrpc_abort_inflight(imp);
obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE);
+
+ EXIT;
+}
+
+/*
+ * This acts as a barrier; all existing requests are rejected, and
+ * no new requests will be accepted until the import is valid again.
+ */
+void ptlrpc_deactivate_import(struct obd_import *imp)
+{
+ cfs_spin_lock(&imp->imp_lock);
+ ptlrpc_deactivate_and_unlock_import(imp);
+}
+
+static unsigned int
+ptlrpc_inflight_deadline(struct ptlrpc_request *req, time_t now)
+{
+ long dl;
+
+ if (!(((req->rq_phase == RQ_PHASE_RPC) && !req->rq_waiting) ||
+ (req->rq_phase == RQ_PHASE_BULK) ||
+ (req->rq_phase == RQ_PHASE_NEW)))
+ return 0;
+
+ if (req->rq_timedout)
+ return 0;
+
+ if (req->rq_phase == RQ_PHASE_NEW)
+ dl = req->rq_sent;
+ else
+ dl = req->rq_deadline;
+
+ if (dl <= now)
+ return 0;
+
+ return dl - now;
+}
+
+static unsigned int ptlrpc_inflight_timeout(struct obd_import *imp)
+{
+ time_t now = cfs_time_current_sec();
+ cfs_list_t *tmp, *n;
+ struct ptlrpc_request *req;
+ unsigned int timeout = 0;
+
+ cfs_spin_lock(&imp->imp_lock);
+ cfs_list_for_each_safe(tmp, n, &imp->imp_sending_list) {
+ req = cfs_list_entry(tmp, struct ptlrpc_request, rq_list);
+ timeout = max(ptlrpc_inflight_deadline(req, now), timeout);
+ }
+ cfs_spin_unlock(&imp->imp_lock);
+ return timeout;
}
/*
* for all the RPC completions, and finally notify the obd to
* invalidate its state (ie cancel locks, clear pending requests,
* etc).
- *
- * in_rpc: true if this is called while processing an rpc, like
- * CONNECT. It will allow for one RPC to be inflight while
- * waiting for requests to complete. Ugly, yes, but I don't see an
- * cleaner way right now.
*/
-void ptlrpc_invalidate_import(struct obd_import *imp, int in_rpc)
+void ptlrpc_invalidate_import(struct obd_import *imp)
{
+ cfs_list_t *tmp, *n;
+ struct ptlrpc_request *req;
struct l_wait_info lwi;
- unsigned long timeout;
- int inflight = 0;
+ unsigned int timeout;
int rc;
- if (!imp->imp_invalid)
- ptlrpc_deactivate_import(imp);
+ cfs_atomic_inc(&imp->imp_inval_count);
- LASSERT(imp->imp_invalid);
+ /*
+ * If this is an invalid MGC connection, then don't bother
+ * waiting for imp_inflight to drop to 0.
+ */
+ if (imp->imp_invalid && imp->imp_recon_bk &&!imp->imp_obd->obd_no_recov)
+ goto out;
- if (in_rpc)
- inflight = 1;
+ if (!imp->imp_invalid || imp->imp_obd->obd_no_recov)
+ ptlrpc_deactivate_import(imp);
- /* wait for all requests to error out and call completion
- callbacks */
- if (imp->imp_server_timeout)
- timeout = obd_timeout / 2;
- else
- timeout = obd_timeout;
- timeout = MAX(timeout * HZ, 1);
- lwi = LWI_TIMEOUT_INTR(timeout, NULL, NULL, NULL);
- rc = l_wait_event(imp->imp_recovery_waitq,
- (atomic_read(&imp->imp_inflight) == inflight),
- &lwi);
+ LASSERT(imp->imp_invalid);
- if (rc)
- CERROR("%s: rc = %d waiting for callback (%d != %d)\n",
- imp->imp_target_uuid.uuid, rc,
- atomic_read(&imp->imp_inflight), !!in_rpc);
+ /* Wait forever until inflight == 0. We really can't do it another
+ * way because in some cases we need to wait for very long reply
+ * unlink. We can't do anything before that because there is really
+ * no guarantee that some rdma transfer is not in progress right now. */
+ do {
+ /* Calculate max timeout for waiting on rpcs to error
+ * out. Use obd_timeout if calculated value is smaller
+ * than it. */
+ if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK)) {
+ timeout = ptlrpc_inflight_timeout(imp);
+ timeout += timeout / 3;
+
+ if (timeout == 0)
+ timeout = obd_timeout;
+ } else {
+ /* decrease the interval to increase race condition */
+ timeout = 1;
+ }
+ CDEBUG(D_RPCTRACE,"Sleeping %d sec for inflight to error out\n",
+ timeout);
+
+ /* Wait for all requests to error out and call completion
+ * callbacks. Cap it at obd_timeout -- these should all
+ * have been locally cancelled by ptlrpc_abort_inflight. */
+ lwi = LWI_TIMEOUT_INTERVAL(
+ cfs_timeout_cap(cfs_time_seconds(timeout)),
+ (timeout > 1)?cfs_time_seconds(1):cfs_time_seconds(1)/2,
+ NULL, NULL);
+ rc = l_wait_event(imp->imp_recovery_waitq,
+ (cfs_atomic_read(&imp->imp_inflight) == 0),
+ &lwi);
+ if (rc) {
+ const char *cli_tgt = obd2cli_tgt(imp->imp_obd);
+
+ CERROR("%s: rc = %d waiting for callback (%d != 0)\n",
+ cli_tgt, rc,
+ cfs_atomic_read(&imp->imp_inflight));
+
+ cfs_spin_lock(&imp->imp_lock);
+ if (cfs_atomic_read(&imp->imp_inflight) == 0) {
+ int count = cfs_atomic_read(&imp->imp_unregistering);
+
+ /* We know that "unregistering" rpcs only can
+ * survive in sending or delaying lists (they
+ * maybe waiting for long reply unlink in
+ * sluggish nets). Let's check this. If there
+ * is no inflight and unregistering != 0, this
+ * is bug. */
+ LASSERTF(count == 0, "Some RPCs are still "
+ "unregistering: %d\n", count);
+
+ /* Let's save one loop as soon as inflight have
+ * dropped to zero. No new inflights possible at
+ * this point. */
+ rc = 0;
+ } else {
+ cfs_list_for_each_safe(tmp, n,
+ &imp->imp_sending_list) {
+ req = cfs_list_entry(tmp,
+ struct ptlrpc_request,
+ rq_list);
+ DEBUG_REQ(D_ERROR, req,
+ "still on sending list");
+ }
+ cfs_list_for_each_safe(tmp, n,
+ &imp->imp_delayed_list) {
+ req = cfs_list_entry(tmp,
+ struct ptlrpc_request,
+ rq_list);
+ DEBUG_REQ(D_ERROR, req,
+ "still on delayed list");
+ }
+
+ CERROR("%s: RPCs in \"%s\" phase found (%d). "
+ "Network is sluggish? Waiting them "
+ "to error out.\n", cli_tgt,
+ ptlrpc_phase2str(RQ_PHASE_UNREGISTERING),
+ cfs_atomic_read(&imp->
+ imp_unregistering));
+ }
+ cfs_spin_unlock(&imp->imp_lock);
+ }
+ } while (rc != 0);
+
+ /*
+ * Let's additionally check that no new rpcs added to import in
+ * "invalidate" state.
+ */
+ LASSERT(cfs_atomic_read(&imp->imp_inflight) == 0);
+out:
obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE);
+ sptlrpc_import_flush_all_ctx(imp);
+
+ cfs_atomic_dec(&imp->imp_inval_count);
+ cfs_waitq_broadcast(&imp->imp_recovery_waitq);
}
+/* unset imp_invalid */
void ptlrpc_activate_import(struct obd_import *imp)
{
struct obd_device *obd = imp->imp_obd;
- unsigned long flags;
- spin_lock_irqsave(&imp->imp_lock, flags);
+ cfs_spin_lock(&imp->imp_lock);
imp->imp_invalid = 0;
- spin_unlock_irqrestore(&imp->imp_lock, flags);
-
+ ptlrpc_activate_timeouts(imp);
+ cfs_spin_unlock(&imp->imp_lock);
obd_import_event(obd, imp, IMP_EVENT_ACTIVE);
- ptlrpc_activate_timeouts();
}
-void ptlrpc_fail_import(struct obd_import *imp, int generation)
+void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt)
{
ENTRY;
- LASSERT (!imp->imp_dlm_fake);
-
- if (ptlrpc_set_import_discon(imp)) {
- unsigned long flags;
+ LASSERT(!imp->imp_dlm_fake);
+ if (ptlrpc_set_import_discon(imp, conn_cnt)) {
if (!imp->imp_replayable) {
CDEBUG(D_HA, "import %s@%s for %s not replayable, "
"auto-deactivating\n",
- imp->imp_target_uuid.uuid,
+ obd2cli_tgt(imp->imp_obd),
imp->imp_connection->c_remote_uuid.uuid,
imp->imp_obd->obd_name);
ptlrpc_deactivate_import(imp);
}
CDEBUG(D_HA, "%s: waking up pinger\n",
- imp->imp_target_uuid.uuid);
+ obd2cli_tgt(imp->imp_obd));
- spin_lock_irqsave(&imp->imp_lock, flags);
+ cfs_spin_lock(&imp->imp_lock);
imp->imp_force_verify = 1;
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ cfs_spin_unlock(&imp->imp_lock);
ptlrpc_pinger_wake_up();
}
EXIT;
}
-#define ATTEMPT_TOO_SOON(last) \
- ((last) && ((long)(jiffies - (last)) <= (long)(obd_timeout * 2 * HZ)))
+int ptlrpc_reconnect_import(struct obd_import *imp)
+{
+ ptlrpc_set_import_discon(imp, 0);
+ /* Force a new connect attempt */
+ ptlrpc_invalidate_import(imp);
+ /* Do a fresh connect next time by zeroing the handle */
+ ptlrpc_disconnect_import(imp, 1);
+ /* Wait for all invalidate calls to finish */
+ if (cfs_atomic_read(&imp->imp_inval_count) > 0) {
+ int rc;
+ struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
+ rc = l_wait_event(imp->imp_recovery_waitq,
+ (cfs_atomic_read(&imp->imp_inval_count) == 0),
+ &lwi);
+ if (rc)
+ CERROR("Interrupted, inval=%d\n",
+ cfs_atomic_read(&imp->imp_inval_count));
+ }
+
+ /* Allow reconnect attempts */
+ imp->imp_obd->obd_no_recov = 0;
+ /* Remove 'invalid' flag */
+ ptlrpc_activate_import(imp);
+ /* Attempt a new connect */
+ ptlrpc_recover_import(imp, NULL);
+ return 0;
+}
+
+EXPORT_SYMBOL(ptlrpc_reconnect_import);
static int import_select_connection(struct obd_import *imp)
{
- struct obd_import_conn *imp_conn, *tmp;
+ struct obd_import_conn *imp_conn = NULL, *conn;
struct obd_export *dlmexp;
- int found = 0;
+ int tried_all = 1;
ENTRY;
- spin_lock(&imp->imp_lock);
+ cfs_spin_lock(&imp->imp_lock);
- if (list_empty(&imp->imp_conn_list)) {
- CERROR("no available connections on imp %p@%s\n",
- imp, imp->imp_obd->obd_name);
- spin_unlock(&imp->imp_lock);
+ if (cfs_list_empty(&imp->imp_conn_list)) {
+ CERROR("%s: no connections available\n",
+ imp->imp_obd->obd_name);
+ cfs_spin_unlock(&imp->imp_lock);
RETURN(-EINVAL);
}
- list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) {
- if (!ATTEMPT_TOO_SOON(imp_conn->oic_last_attempt)) {
- found = 1;
+ cfs_list_for_each_entry(conn, &imp->imp_conn_list, oic_item) {
+ CDEBUG(D_HA, "%s: connect to NID %s last attempt "LPU64"\n",
+ imp->imp_obd->obd_name,
+ libcfs_nid2str(conn->oic_conn->c_peer.nid),
+ conn->oic_last_attempt);
+ /* Don't thrash connections */
+ if (cfs_time_before_64(cfs_time_current_64(),
+ conn->oic_last_attempt +
+ cfs_time_seconds(CONNECTION_SWITCH_MIN))) {
+ continue;
+ }
+
+ /* If we have not tried this connection since
+ the last successful attempt, go with this one */
+ if ((conn->oic_last_attempt == 0) ||
+ cfs_time_beforeq_64(conn->oic_last_attempt,
+ imp->imp_last_success_conn)) {
+ imp_conn = conn;
+ tried_all = 0;
break;
}
+
+ /* If all of the connections have already been tried
+ since the last successful connection; just choose the
+ least recently used */
+ if (!imp_conn)
+ imp_conn = conn;
+ else if (cfs_time_before_64(conn->oic_last_attempt,
+ imp_conn->oic_last_attempt))
+ imp_conn = conn;
}
/* if not found, simply choose the current one */
- if (!found) {
- CWARN("obd %s imp 0x%p: all connections have been "
- "tried recently\n", imp->imp_obd->obd_name, imp);
+ if (!imp_conn || imp->imp_force_reconnect) {
LASSERT(imp->imp_conn_current);
imp_conn = imp->imp_conn_current;
+ tried_all = 0;
}
LASSERT(imp_conn->oic_conn);
- imp_conn->oic_last_attempt = jiffies;
-
- /* move the items ahead of the selected one to list tail */
- while (1) {
- tmp= list_entry(imp->imp_conn_list.next,
- struct obd_import_conn, oic_item);
- if (tmp == imp_conn)
- break;
- list_del(&tmp->oic_item);
- list_add_tail(&tmp->oic_item, &imp->imp_conn_list);
- }
-
- /* switch connection if we chose a new one */
- if (imp->imp_connection != imp_conn->oic_conn) {
- if (imp->imp_connection) {
- ptlrpcs_sec_invalidate_cache(imp->imp_sec);
- ptlrpc_put_connection(imp->imp_connection);
+ /* If we've tried everything, and we're back to the beginning of the
+ list, increase our timeout and try again. It will be reset when
+ we do finally connect. (FIXME: really we should wait for all network
+ state associated with the last connection attempt to drain before
+ trying to reconnect on it.) */
+ if (tried_all && (imp->imp_conn_list.next == &imp_conn->oic_item) &&
+ !imp->imp_recon_bk /* not retrying */) {
+ if (at_get(&imp->imp_at.iat_net_latency) <
+ CONNECTION_SWITCH_MAX) {
+ at_measured(&imp->imp_at.iat_net_latency,
+ at_get(&imp->imp_at.iat_net_latency) +
+ CONNECTION_SWITCH_INC);
}
- imp->imp_connection =
- ptlrpc_connection_addref(imp_conn->oic_conn);
+ LASSERT(imp_conn->oic_last_attempt);
+ CWARN("%s: tried all connections, increasing latency to %ds\n",
+ imp->imp_obd->obd_name,
+ at_get(&imp->imp_at.iat_net_latency));
}
+ imp_conn->oic_last_attempt = cfs_time_current_64();
+
+ /* switch connection, don't mind if it's same as the current one */
+ if (imp->imp_connection)
+ ptlrpc_connection_put(imp->imp_connection);
+ imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
+
dlmexp = class_conn2export(&imp->imp_dlm_handle);
LASSERT(dlmexp != NULL);
if (dlmexp->exp_connection)
- ptlrpc_put_connection(imp->imp_connection);
+ ptlrpc_connection_put(dlmexp->exp_connection);
dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn);
class_export_put(dlmexp);
- imp->imp_conn_current = imp_conn;
- CWARN("obd %s imp 0x%p: select conn %s\n",
- imp->imp_obd->obd_name, imp,
- imp_conn->oic_uuid.uuid);
- spin_unlock(&imp->imp_lock);
+ if (imp->imp_conn_current != imp_conn) {
+ if (imp->imp_conn_current)
+ CDEBUG(D_HA, "Changing connection for %s to %s/%s\n",
+ imp->imp_obd->obd_name, imp_conn->oic_uuid.uuid,
+ libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
+ imp->imp_conn_current = imp_conn;
+ }
+
+ CDEBUG(D_HA, "%s: import %p using connection %s/%s\n",
+ imp->imp_obd->obd_name, imp, imp_conn->oic_uuid.uuid,
+ libcfs_nid2str(imp_conn->oic_conn->c_peer.nid));
+
+ cfs_spin_unlock(&imp->imp_lock);
RETURN(0);
}
/*
* must be called under imp_lock
*/
-int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
+static int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno)
{
struct ptlrpc_request *req;
- struct list_head *tmp;
-
- if (list_empty(&imp->imp_replay_list))
+ cfs_list_t *tmp;
+
+ if (cfs_list_empty(&imp->imp_replay_list))
return 0;
tmp = imp->imp_replay_list.next;
- req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
+ req = cfs_list_entry(tmp, struct ptlrpc_request, rq_replay_list);
*transno = req->rq_transno;
+ if (req->rq_transno == 0) {
+ DEBUG_REQ(D_ERROR, req, "zero transno in replay");
+ LBUG();
+ }
+
return 1;
}
-int ptlrpc_connect_import(struct obd_import *imp, char * new_uuid)
+int ptlrpc_connect_import(struct obd_import *imp, char *new_uuid)
{
struct obd_device *obd = imp->imp_obd;
int initial_connect = 0;
int set_transno = 0;
- int rc;
__u64 committed_before_reconnect = 0;
struct ptlrpc_request *request;
- int size[] = {0,
- sizeof(imp->imp_target_uuid),
- sizeof(obd->obd_uuid),
- sizeof(imp->imp_dlm_handle),
- sizeof(imp->imp_connect_flags),
- sizeof(imp->imp_connect_data)};
- char *tmp[] = {NULL,
- imp->imp_target_uuid.uuid,
- obd->obd_uuid.uuid,
- (char *)&imp->imp_dlm_handle,
- (char *)&imp->imp_connect_flags, /* XXX: make this portable! */
- (char*) &imp->imp_connect_data};
- int repsize = sizeof(struct obd_connect_data);
-
+ char *bufs[] = { NULL,
+ obd2cli_tgt(imp->imp_obd),
+ obd->obd_uuid.uuid,
+ (char *)&imp->imp_dlm_handle,
+ (char *)&imp->imp_connect_data };
struct ptlrpc_connect_async_args *aa;
- unsigned long flags;
+ int rc;
+ ENTRY;
- spin_lock_irqsave(&imp->imp_lock, flags);
+ cfs_spin_lock(&imp->imp_lock);
if (imp->imp_state == LUSTRE_IMP_CLOSED) {
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ cfs_spin_unlock(&imp->imp_lock);
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);
+ cfs_spin_unlock(&imp->imp_lock);
CERROR("already connected\n");
RETURN(0);
} else if (imp->imp_state == LUSTRE_IMP_CONNECTING) {
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ cfs_spin_unlock(&imp->imp_lock);
CERROR("already connecting\n");
RETURN(-EALREADY);
}
IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING);
+ imp->imp_conn_cnt++;
imp->imp_resend_replay = 0;
- if (imp->imp_remote_handle.cookie == 0) {
+ if (!lustre_handle_is_used(&imp->imp_remote_handle))
initial_connect = 1;
- } else {
- committed_before_reconnect = imp->imp_peer_committed_transno;;
- imp->imp_conn_cnt++;
- }
-
- set_transno = ptlrpc_first_transno(imp, &imp->imp_connect_data.transno);
+ else
+ committed_before_reconnect = imp->imp_peer_committed_transno;
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ set_transno = ptlrpc_first_transno(imp,
+ &imp->imp_connect_data.ocd_transno);
+ cfs_spin_unlock(&imp->imp_lock);
if (new_uuid) {
struct obd_uuid uuid;
obd_str2uuid(&uuid, new_uuid);
-
rc = import_set_conn_priority(imp, &uuid);
if (rc)
GOTO(out, rc);
}
+
rc = import_select_connection(imp);
if (rc)
GOTO(out, rc);
- LASSERT(imp->imp_sec);
+ /* last in connection list */
+ if (imp->imp_conn_current->oic_item.next == &imp->imp_conn_list) {
+ if (imp->imp_initial_recov_bk && initial_connect) {
+ CDEBUG(D_HA, "Last connection attempt (%d) for %s\n",
+ imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
+ /* Don't retry if connect fails */
+ rc = 0;
+ obd_set_info_async(obd->obd_self_export,
+ sizeof(KEY_INIT_RECOV),
+ KEY_INIT_RECOV,
+ sizeof(rc), &rc, NULL);
+ }
+ if (imp->imp_recon_bk) {
+ CDEBUG(D_HA, "Last reconnection attempt (%d) for %s\n",
+ imp->imp_conn_cnt, obd2cli_tgt(imp->imp_obd));
+ cfs_spin_lock(&imp->imp_lock);
+ imp->imp_last_recon = 1;
+ cfs_spin_unlock(&imp->imp_lock);
+ }
+ }
- size[0] = lustre_secdesc_size();
- request = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION,
- imp->imp_connect_op, 6, size, tmp);
- if (!request)
+ rc = sptlrpc_import_sec_adapt(imp, NULL, 0);
+ if (rc)
+ GOTO(out, rc);
+
+ /* Reset connect flags to the originally requested flags, in case
+ * the server is updated on-the-fly we will get the new features. */
+ imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig;
+ imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
+ imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
+
+ rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd,
+ &obd->obd_uuid, &imp->imp_connect_data, NULL);
+ if (rc)
+ GOTO(out, rc);
+
+ request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT);
+ if (request == NULL)
GOTO(out, rc = -ENOMEM);
- lustre_pack_secdesc(request, size[0]);
+ rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION,
+ imp->imp_connect_op, bufs, NULL);
+ if (rc) {
+ ptlrpc_request_free(request);
+ GOTO(out, rc);
+ }
+
+ /* Report the rpc service time to the server so that it knows how long
+ * to wait for clients to join recovery */
+ lustre_msg_set_service_time(request->rq_reqmsg,
+ at_timeout2est(request->rq_timeout));
+
+ /* The amount of time we give the server to process the connect req.
+ * import_select_connection will increase the net latency on
+ * repeated reconnect attempts to cover slow networks.
+ * We override/ignore the server rpc completion estimate here,
+ * which may be large if this is a reconnect attempt */
+ request->rq_timeout = INITIAL_CONNECT_TIMEOUT;
+ lustre_msg_set_timeout(request->rq_reqmsg, request->rq_timeout);
#ifndef __KERNEL__
lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT);
#endif
- if (obd->u.cli.cl_async) {
- lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_ASYNC);
- }
+ lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_NEXT_VER);
+ request->rq_no_resend = request->rq_no_delay = 1;
request->rq_send_state = LUSTRE_IMP_CONNECTING;
- request->rq_replen = lustre_msg_size(1, &repsize);
+ /* Allow a slightly larger reply for future growth compatibility */
+ req_capsule_set_size(&request->rq_pill, &RMF_CONNECT_DATA, RCL_SERVER,
+ sizeof(struct obd_connect_data)+16*sizeof(__u64));
+ ptlrpc_request_set_replen(request);
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;
+ CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args));
+ aa = ptlrpc_req_async_args(request);
memset(aa, 0, sizeof *aa);
aa->pcaa_peer_committed = committed_before_reconnect;
aa->pcaa_initial_connect = initial_connect;
if (aa->pcaa_initial_connect) {
- lustre_msg_add_op_flags(request->rq_reqmsg,
+ cfs_spin_lock(&imp->imp_lock);
+ imp->imp_replayable = 1;
+ cfs_spin_unlock(&imp->imp_lock);
+ lustre_msg_add_op_flags(request->rq_reqmsg,
MSG_CONNECT_INITIAL);
- imp->imp_replayable = 1;
}
+
if (set_transno)
- lustre_msg_add_op_flags(request->rq_reqmsg,
+ lustre_msg_add_op_flags(request->rq_reqmsg,
MSG_CONNECT_TRANSNO);
-
- imp->imp_reqs_replayed = imp->imp_locks_replayed = 0;
- ptlrpcd_add_req(request);
+ DEBUG_REQ(D_RPCTRACE, request, "(re)connect request (timeout %d)",
+ request->rq_timeout);
+ ptlrpcd_add_req(request, PSCOPE_OTHER);
rc = 0;
- imp->imp_connect_start = jiffies;
out:
if (rc != 0) {
IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
RETURN(rc);
}
+EXPORT_SYMBOL(ptlrpc_connect_import);
-static int ptlrpc_connect_interpret(struct ptlrpc_request *request,
+static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp)
+{
+#ifdef __KERNEL__
+ struct obd_import_conn *imp_conn;
+#endif
+ int wake_pinger = 0;
+
+ ENTRY;
+
+ cfs_spin_lock(&imp->imp_lock);
+ if (cfs_list_empty(&imp->imp_conn_list))
+ GOTO(unlock, 0);
+
+#ifdef __KERNEL__
+ imp_conn = cfs_list_entry(imp->imp_conn_list.prev,
+ struct obd_import_conn,
+ oic_item);
+
+ /* XXX: When the failover node is the primary node, it is possible
+ * to have two identical connections in imp_conn_list. We must
+ * compare not conn's pointers but NIDs, otherwise we can defeat
+ * connection throttling. (See bug 14774.) */
+ if (imp->imp_conn_current->oic_conn->c_peer.nid !=
+ imp_conn->oic_conn->c_peer.nid) {
+ ptlrpc_ping_import_soon(imp);
+ wake_pinger = 1;
+ }
+#else
+ /* liblustre has no pinger thread, so we wakeup pinger anyway */
+ wake_pinger = 1;
+#endif
+
+ unlock:
+ cfs_spin_unlock(&imp->imp_lock);
+
+ if (wake_pinger)
+ ptlrpc_pinger_wake_up();
+
+ EXIT;
+}
+
+static int ptlrpc_busy_reconnect(int rc)
+{
+ return (rc == -EBUSY) || (rc == -EAGAIN);
+}
+
+
+static int ptlrpc_connect_interpret(const struct lu_env *env,
+ struct ptlrpc_request *request,
void *data, int rc)
{
struct ptlrpc_connect_async_args *aa = data;
struct obd_import *imp = request->rq_import;
+ struct client_obd *cli = &imp->imp_obd->u.cli;
struct lustre_handle old_hdl;
- unsigned long flags;
+ __u64 old_connect_flags;
int msg_flags;
ENTRY;
- spin_lock_irqsave(&imp->imp_lock, flags);
+ cfs_spin_lock(&imp->imp_lock);
if (imp->imp_state == LUSTRE_IMP_CLOSED) {
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ cfs_spin_unlock(&imp->imp_lock);
RETURN(0);
}
- spin_unlock_irqrestore(&imp->imp_lock, flags);
- if (rc)
+ if (rc) {
+ /* if this reconnect to busy export - not need select new target
+ * for connecting*/
+ imp->imp_force_reconnect = ptlrpc_busy_reconnect(rc);
+ cfs_spin_unlock(&imp->imp_lock);
GOTO(out, rc);
+ }
+
LASSERT(imp->imp_conn_current);
- imp->imp_conn_current->oic_last_attempt = 0;
-/*
- remote_flag = lustre_msg_buf(request->rq_repmsg, 0, sizeof(int));
- LASSERT(remote_flag != NULL);
- imp->imp_obd->u.cli.cl_remote = *remote_flag;
-*/
- msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
- if (aa->pcaa_initial_connect) {
- struct obd_connect_data *conn_data;
+ msg_flags = lustre_msg_get_op_flags(request->rq_repmsg);
- conn_data = lustre_swab_repbuf(request, 0, sizeof(*conn_data),
- lustre_swab_connect);
- LASSERT(conn_data);
- imp->imp_connect_data.ocd_connect_flags =
- conn_data->ocd_connect_flags;
+ /* All imports are pingable */
+ imp->imp_pingable = 1;
+ imp->imp_force_reconnect = 0;
+ if (aa->pcaa_initial_connect) {
if (msg_flags & MSG_CONNECT_REPLAYABLE) {
+ imp->imp_replayable = 1;
+ cfs_spin_unlock(&imp->imp_lock);
CDEBUG(D_HA, "connected to replayable target: %s\n",
- imp->imp_target_uuid.uuid);
- imp->imp_pingable = imp->imp_replayable = 1;
+ obd2cli_tgt(imp->imp_obd));
} else {
imp->imp_replayable = 0;
+ cfs_spin_unlock(&imp->imp_lock);
}
- LASSERTF(imp->imp_conn_cnt < request->rq_repmsg->conn_cnt,
- "imp conn_cnt %d req conn_cnt %d",
- imp->imp_conn_cnt, request->rq_repmsg->conn_cnt);
- imp->imp_conn_cnt = request->rq_repmsg->conn_cnt;
- imp->imp_remote_handle = request->rq_repmsg->handle;
- IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
- ptlrpc_pinger_sending_on_import(imp);
+
+ /* if applies, adjust the imp->imp_msg_magic here
+ * according to reply flags */
+
+ imp->imp_remote_handle =
+ *lustre_msg_get_handle(request->rq_repmsg);
+
+ /* Initial connects are allowed for clients with non-random
+ * uuids when servers are in recovery. Simply signal the
+ * servers replay is complete and wait in REPLAY_WAIT. */
+ if (msg_flags & MSG_CONNECT_RECOVERING) {
+ CDEBUG(D_HA, "connect to %s during recovery\n",
+ obd2cli_tgt(imp->imp_obd));
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
+ } else {
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
+ ptlrpc_activate_import(imp);
+ }
+
GOTO(finish, rc = 0);
+ } else {
+ cfs_spin_unlock(&imp->imp_lock);
}
/* Determine what recovery state to move the import to. */
if (MSG_CONNECT_RECONNECT & msg_flags) {
memset(&old_hdl, 0, sizeof(old_hdl));
- if (!memcmp(&old_hdl, &request->rq_repmsg->handle,
+ if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg),
sizeof (old_hdl))) {
CERROR("%s@%s didn't like our handle "LPX64
- ", failed\n", imp->imp_target_uuid.uuid,
+ ", failed\n", obd2cli_tgt(imp->imp_obd),
imp->imp_connection->c_remote_uuid.uuid,
imp->imp_dlm_handle.cookie);
GOTO(out, rc = -ENOTCONN);
}
- if (memcmp(&imp->imp_remote_handle, &request->rq_repmsg->handle,
+ if (memcmp(&imp->imp_remote_handle,
+ lustre_msg_get_handle(request->rq_repmsg),
sizeof(imp->imp_remote_handle))) {
- CERROR("%s@%s changed handle from "LPX64" to "LPX64
- "; copying, but this may foreshadow disaster\n",
- imp->imp_target_uuid.uuid,
- imp->imp_connection->c_remote_uuid.uuid,
- imp->imp_remote_handle.cookie,
- request->rq_repmsg->handle.cookie);
- imp->imp_remote_handle = request->rq_repmsg->handle;
+ int level = msg_flags & MSG_CONNECT_RECOVERING ?
+ D_HA : D_WARNING;
+
+ /* Bug 16611/14775: if server handle have changed,
+ * that means some sort of disconnection happened.
+ * If the server is not in recovery, that also means it
+ * already erased all of our state because of previous
+ * eviction. If it is in recovery - we are safe to
+ * participate since we can reestablish all of our state
+ * with server again */
+ CDEBUG(level,"%s@%s changed server handle from "
+ LPX64" to "LPX64"%s\n",
+ obd2cli_tgt(imp->imp_obd),
+ imp->imp_connection->c_remote_uuid.uuid,
+ imp->imp_remote_handle.cookie,
+ lustre_msg_get_handle(request->rq_repmsg)->
+ cookie,
+ (MSG_CONNECT_RECOVERING & msg_flags) ?
+ " but is still in recovery" : "");
+
+ imp->imp_remote_handle =
+ *lustre_msg_get_handle(request->rq_repmsg);
+
+ if (!(MSG_CONNECT_RECOVERING & msg_flags)) {
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
+ GOTO(finish, rc = 0);
+ }
+
} else {
CDEBUG(D_HA, "reconnected to %s@%s after partition\n",
- imp->imp_target_uuid.uuid,
+ obd2cli_tgt(imp->imp_obd),
imp->imp_connection->c_remote_uuid.uuid);
}
if (imp->imp_invalid) {
+ CDEBUG(D_HA, "%s: reconnected but import is invalid; "
+ "marking evicted\n", imp->imp_obd->obd_name);
IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
} else if (MSG_CONNECT_RECOVERING & msg_flags) {
CDEBUG(D_HA, "%s: reconnected to %s during replay\n",
- imp->imp_obd->obd_name,
- imp->imp_target_uuid.uuid);
+ imp->imp_obd->obd_name,
+ obd2cli_tgt(imp->imp_obd));
+
+ cfs_spin_lock(&imp->imp_lock);
imp->imp_resend_replay = 1;
+ cfs_spin_unlock(&imp->imp_lock);
+
IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
} else {
IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
}
} else if ((MSG_CONNECT_RECOVERING & msg_flags) && !imp->imp_invalid) {
LASSERT(imp->imp_replayable);
- imp->imp_remote_handle = request->rq_repmsg->handle;
+ imp->imp_remote_handle =
+ *lustre_msg_get_handle(request->rq_repmsg);
imp->imp_last_replay_transno = 0;
IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY);
} else {
- CDEBUG(D_HA, "oops! we get evicted from %s\n", imp->imp_target_uuid.uuid);
- imp->imp_remote_handle = request->rq_repmsg->handle;
+ DEBUG_REQ(D_HA, request, "%s: evicting (reconnect/recover flags"
+ " not set: %x)", imp->imp_obd->obd_name, msg_flags);
+ imp->imp_remote_handle =
+ *lustre_msg_get_handle(request->rq_repmsg);
IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED);
}
"after reconnect. We should LBUG right here.\n");
}
- if (request->rq_repmsg->last_committed < aa->pcaa_peer_committed) {
+ if (lustre_msg_get_last_committed(request->rq_repmsg) > 0 &&
+ lustre_msg_get_last_committed(request->rq_repmsg) <
+ 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,
- aa->pcaa_peer_committed,
- request->rq_repmsg->last_committed);
+ ")! See https://bugzilla.lustre.org/show_bug.cgi?"
+ "id=9646\n",
+ obd2cli_tgt(imp->imp_obd), aa->pcaa_peer_committed,
+ lustre_msg_get_last_committed(request->rq_repmsg));
}
finish:
if (rc == -ENOTCONN) {
CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery;"
"invalidating and reconnecting\n",
- imp->imp_target_uuid.uuid,
+ obd2cli_tgt(imp->imp_obd),
imp->imp_connection->c_remote_uuid.uuid);
ptlrpc_connect_import(imp, NULL);
RETURN(0);
}
+ } else {
+ struct obd_connect_data *ocd;
+ struct obd_export *exp;
+ int ret;
+ ret = req_capsule_get_size(&request->rq_pill, &RMF_CONNECT_DATA,
+ RCL_SERVER);
+ /* server replied obd_connect_data is always bigger */
+ ocd = req_capsule_server_sized_get(&request->rq_pill,
+ &RMF_CONNECT_DATA, ret);
+
+ cfs_spin_lock(&imp->imp_lock);
+ cfs_list_del(&imp->imp_conn_current->oic_item);
+ cfs_list_add(&imp->imp_conn_current->oic_item,
+ &imp->imp_conn_list);
+ imp->imp_last_success_conn =
+ imp->imp_conn_current->oic_last_attempt;
+
+ if (ocd == NULL) {
+ cfs_spin_unlock(&imp->imp_lock);
+ CERROR("Wrong connect data from server\n");
+ rc = -EPROTO;
+ GOTO(out, rc);
+ }
+
+ imp->imp_connect_data = *ocd;
+
+ exp = class_conn2export(&imp->imp_dlm_handle);
+ cfs_spin_unlock(&imp->imp_lock);
+
+ /* check that server granted subset of flags we asked for. */
+ LASSERTF((ocd->ocd_connect_flags &
+ imp->imp_connect_flags_orig) ==
+ ocd->ocd_connect_flags, LPX64" != "LPX64,
+ imp->imp_connect_flags_orig, ocd->ocd_connect_flags);
+
+ if (!exp) {
+ /* This could happen if export is cleaned during the
+ connect attempt */
+ CERROR("Missing export for %s\n",
+ imp->imp_obd->obd_name);
+ GOTO(out, rc = -ENODEV);
+ }
+ old_connect_flags = exp->exp_connect_flags;
+ exp->exp_connect_flags = ocd->ocd_connect_flags;
+ imp->imp_obd->obd_self_export->exp_connect_flags =
+ ocd->ocd_connect_flags;
+ class_export_put(exp);
+
+ obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD);
+
+ if (!ocd->ocd_ibits_known &&
+ ocd->ocd_connect_flags & OBD_CONNECT_IBITS)
+ CERROR("Inodebits aware server returned zero compatible"
+ " bits?\n");
+
+ if ((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
+ (ocd->ocd_version > LUSTRE_VERSION_CODE +
+ LUSTRE_VERSION_OFFSET_WARN ||
+ ocd->ocd_version < LUSTRE_VERSION_CODE -
+ LUSTRE_VERSION_OFFSET_WARN)) {
+ /* Sigh, some compilers do not like #ifdef in the middle
+ of macro arguments */
+#ifdef __KERNEL__
+ const char *older =
+ "older. Consider upgrading this client";
+#else
+ const char *older =
+ "older. Consider recompiling this application";
+#endif
+ const char *newer = "newer than client version";
+
+ LCONSOLE_WARN("Server %s version (%d.%d.%d.%d) "
+ "is much %s (%s)\n",
+ obd2cli_tgt(imp->imp_obd),
+ OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
+ OBD_OCD_VERSION_MINOR(ocd->ocd_version),
+ OBD_OCD_VERSION_PATCH(ocd->ocd_version),
+ OBD_OCD_VERSION_FIX(ocd->ocd_version),
+ ocd->ocd_version > LUSTRE_VERSION_CODE ?
+ newer : older, LUSTRE_VERSION_STRING);
+ }
+
+ if (ocd->ocd_connect_flags & OBD_CONNECT_CKSUM) {
+ /* We sent to the server ocd_cksum_types with bits set
+ * for algorithms we understand. The server masked off
+ * the checksum types it doesn't support */
+ if ((ocd->ocd_cksum_types & OBD_CKSUM_ALL) == 0) {
+ LCONSOLE_WARN("The negotiation of the checksum "
+ "alogrithm to use with server %s "
+ "failed (%x/%x), disabling "
+ "checksums\n",
+ obd2cli_tgt(imp->imp_obd),
+ ocd->ocd_cksum_types,
+ OBD_CKSUM_ALL);
+ cli->cl_checksum = 0;
+ cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
+ cli->cl_cksum_type = OBD_CKSUM_CRC32;
+ } else {
+ cli->cl_supp_cksum_types = ocd->ocd_cksum_types;
+
+ if (ocd->ocd_cksum_types & OSC_DEFAULT_CKSUM)
+ cli->cl_cksum_type = OSC_DEFAULT_CKSUM;
+ else if (ocd->ocd_cksum_types & OBD_CKSUM_ADLER)
+ cli->cl_cksum_type = OBD_CKSUM_ADLER;
+ else
+ cli->cl_cksum_type = OBD_CKSUM_CRC32;
+ }
+ } else {
+ /* The server does not support OBD_CONNECT_CKSUM.
+ * Enforce CRC32 for backward compatibility*/
+ cli->cl_supp_cksum_types = OBD_CKSUM_CRC32;
+ cli->cl_cksum_type = OBD_CKSUM_CRC32;
+ }
+
+ if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
+ cli->cl_max_pages_per_rpc =
+ ocd->ocd_brw_size >> CFS_PAGE_SHIFT;
+ }
+
+ /* Reset ns_connect_flags only for initial connect. It might be
+ * changed in while using FS and if we reset it in reconnect
+ * this leads to losing user settings done before such as
+ * disable lru_resize, etc. */
+ if (old_connect_flags != exp->exp_connect_flags ||
+ aa->pcaa_initial_connect) {
+ CDEBUG(D_HA, "%s: Resetting ns_connect_flags to server "
+ "flags: "LPX64"\n", imp->imp_obd->obd_name,
+ ocd->ocd_connect_flags);
+ imp->imp_obd->obd_namespace->ns_connect_flags =
+ ocd->ocd_connect_flags;
+ imp->imp_obd->obd_namespace->ns_orig_connect_flags =
+ ocd->ocd_connect_flags;
+ }
+
+ if ((ocd->ocd_connect_flags & OBD_CONNECT_AT) &&
+ (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
+ /* We need a per-message support flag, because
+ a. we don't know if the incoming connect reply
+ supports AT or not (in reply_in_callback)
+ until we unpack it.
+ b. failovered server means export and flags are gone
+ (in ptlrpc_send_reply).
+ Can only be set when we know AT is supported at
+ both ends */
+ imp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT;
+ else
+ imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT;
+
+ if ((ocd->ocd_connect_flags & OBD_CONNECT_FULL20) &&
+ (imp->imp_msg_magic == LUSTRE_MSG_MAGIC_V2))
+ imp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18;
+ else
+ imp->imp_msghdr_flags &= ~MSGHDR_CKSUM_INCOMPAT18;
+
+ LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) &&
+ (cli->cl_max_pages_per_rpc > 0));
}
- out:
+
+out:
if (rc != 0) {
IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON);
- if (aa->pcaa_initial_connect && !imp->imp_initial_recov)
+ cfs_spin_lock(&imp->imp_lock);
+ if (aa->pcaa_initial_connect && !imp->imp_initial_recov &&
+ (request->rq_import_generation == imp->imp_generation))
+ ptlrpc_deactivate_and_unlock_import(imp);
+ else
+ cfs_spin_unlock(&imp->imp_lock);
+
+ if ((imp->imp_recon_bk && imp->imp_last_recon) ||
+ (rc == -EACCES)) {
+ /*
+ * Give up trying to reconnect
+ * EACCES means client has no permission for connection
+ */
+ imp->imp_obd->obd_no_recov = 1;
ptlrpc_deactivate_import(imp);
+ }
+
+ if (rc == -EPROTO) {
+ struct obd_connect_data *ocd;
+
+ /* reply message might not be ready */
+ if (request->rq_repmsg == NULL)
+ RETURN(-EPROTO);
+
+ ocd = req_capsule_server_get(&request->rq_pill,
+ &RMF_CONNECT_DATA);
+ if (ocd &&
+ (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) &&
+ (ocd->ocd_version != LUSTRE_VERSION_CODE)) {
+ /* Actually servers are only supposed to refuse
+ connection from liblustre clients, so we should
+ never see this from VFS context */
+ LCONSOLE_ERROR_MSG(0x16a, "Server %s version "
+ "(%d.%d.%d.%d)"
+ " refused connection from this client "
+ "with an incompatible version (%s). "
+ "Client must be recompiled\n",
+ obd2cli_tgt(imp->imp_obd),
+ OBD_OCD_VERSION_MAJOR(ocd->ocd_version),
+ OBD_OCD_VERSION_MINOR(ocd->ocd_version),
+ OBD_OCD_VERSION_PATCH(ocd->ocd_version),
+ OBD_OCD_VERSION_FIX(ocd->ocd_version),
+ LUSTRE_VERSION_STRING);
+ ptlrpc_deactivate_import(imp);
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED);
+ }
+ RETURN(-EPROTO);
+ }
+
+ ptlrpc_maybe_ping_import_soon(imp);
+
CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n",
- imp->imp_target_uuid.uuid,
+ obd2cli_tgt(imp->imp_obd),
(char *)imp->imp_connection->c_remote_uuid.uuid, rc);
}
- wake_up(&imp->imp_recovery_waitq);
+ cfs_spin_lock(&imp->imp_lock);
+ imp->imp_last_recon = 0;
+ cfs_spin_unlock(&imp->imp_lock);
+
+ cfs_waitq_broadcast(&imp->imp_recovery_waitq);
RETURN(rc);
}
-static int completed_replay_interpret(struct ptlrpc_request *req,
- void *data, int rc)
+static int completed_replay_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req,
+ void * data, int rc)
{
- atomic_dec(&req->rq_import->imp_replay_inflight);
- if (req->rq_status == 0) {
+ ENTRY;
+ cfs_atomic_dec(&req->rq_import->imp_replay_inflight);
+ if (req->rq_status == 0 &&
+ !req->rq_import->imp_vbr_failed) {
ptlrpc_import_recovery_state_machine(req->rq_import);
} else {
- CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
- "reconnecting\n",
- req->rq_import->imp_obd->obd_name, req->rq_status);
+ if (req->rq_import->imp_vbr_failed) {
+ CDEBUG(D_WARNING,
+ "%s: version recovery fails, reconnecting\n",
+ req->rq_import->imp_obd->obd_name);
+ } else {
+ CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, "
+ "reconnecting\n",
+ req->rq_import->imp_obd->obd_name,
+ req->rq_status);
+ }
ptlrpc_connect_import(req->rq_import, NULL);
}
}
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);
+ LASSERT(cfs_atomic_read(&imp->imp_replay_inflight) == 0);
+ cfs_atomic_inc(&imp->imp_replay_inflight);
- req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, OBD_PING, 0, NULL, NULL);
- if (!req) {
- atomic_dec(&imp->imp_replay_inflight);
+ req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION,
+ OBD_PING);
+ if (req == NULL) {
+ cfs_atomic_dec(&imp->imp_replay_inflight);
RETURN(-ENOMEM);
}
- req->rq_replen = lustre_msg_size(0, NULL);
+ ptlrpc_request_set_replen(req);
req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT;
- req->rq_reqmsg->flags |= MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE;
- req->rq_timeout *= 3;
+ lustre_msg_add_flags(req->rq_reqmsg,
+ MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE);
+ if (AT_OFF)
+ req->rq_timeout *= 3;
req->rq_interpret_reply = completed_replay_interpret;
- ptlrpcd_add_req(req);
+ ptlrpcd_add_req(req, PSCOPE_OTHER);
RETURN(0);
}
static int ptlrpc_invalidate_import_thread(void *data)
{
struct obd_import *imp = data;
- unsigned long flags;
ENTRY;
- lock_kernel();
- ptlrpc_daemonize();
-
- SIGNAL_MASK_LOCK(current, flags);
- sigfillset(¤t->blocked);
- RECALC_SIGPENDING;
- SIGNAL_MASK_UNLOCK(current, flags);
- THREAD_NAME(current->comm, sizeof(current->comm), "ll_imp_inval");
- unlock_kernel();
+ cfs_daemonize_ctxt("ll_imp_inval");
CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n",
- imp->imp_obd->obd_name, imp->imp_target_uuid.uuid,
+ imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd),
imp->imp_connection->c_remote_uuid.uuid);
- ptlrpc_invalidate_import(imp, 0);
- IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
+ ptlrpc_invalidate_import(imp);
+
+ if (obd_dump_on_eviction) {
+ CERROR("dump the log upon eviction\n");
+ libcfs_debug_dumplog();
+ }
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
ptlrpc_import_recovery_state_machine(imp);
+ class_import_put(imp);
RETURN(0);
}
#endif
{
int rc = 0;
int inflight;
+ char *target_start;
+ int target_len;
+ ENTRY;
if (imp->imp_state == LUSTRE_IMP_EVICTED) {
+ deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
+ &target_start, &target_len);
+ /* Don't care about MGC eviction */
+ if (strcmp(imp->imp_obd->obd_type->typ_name,
+ LUSTRE_MGC_NAME) != 0) {
+ LCONSOLE_ERROR_MSG(0x167, "This client was evicted by "
+ "%.*s; in progress operations using "
+ "this service will fail.\n",
+ target_len, target_start);
+ }
CDEBUG(D_HA, "evicted from %s@%s; invalidating\n",
- imp->imp_target_uuid.uuid,
+ obd2cli_tgt(imp->imp_obd),
imp->imp_connection->c_remote_uuid.uuid);
+ /* reset vbr_failed flag upon eviction */
+ cfs_spin_lock(&imp->imp_lock);
+ imp->imp_vbr_failed = 0;
+ cfs_spin_unlock(&imp->imp_lock);
#ifdef __KERNEL__
- rc = kernel_thread(ptlrpc_invalidate_import_thread, imp,
- CLONE_VM | CLONE_FILES);
- if (rc < 0)
+ /* bug 17802: XXX client_disconnect_export vs connect request
+ * race. if client will evicted at this time, we start
+ * invalidate thread without reference to import and import can
+ * be freed at same time. */
+ class_import_get(imp);
+ rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp,
+ CLONE_VM | CLONE_FILES);
+ if (rc < 0) {
+ class_import_put(imp);
CERROR("error starting invalidate thread: %d\n", rc);
- RETURN(rc < 0 ? rc : 0);
+ } else {
+ rc = 0;
+ }
+ RETURN(rc);
#else
- ptlrpc_invalidate_import(imp, 1);
+ ptlrpc_invalidate_import(imp);
IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER);
#endif
if (imp->imp_state == LUSTRE_IMP_REPLAY) {
CDEBUG(D_HA, "replay requested by %s\n",
- imp->imp_target_uuid.uuid);
+ obd2cli_tgt(imp->imp_obd));
rc = ptlrpc_replay_next(imp, &inflight);
if (inflight == 0 &&
- atomic_read(&imp->imp_replay_inflight) == 0) {
+ cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS);
rc = ldlm_replay_locks(imp);
if (rc)
}
if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) {
- if (atomic_read(&imp->imp_replay_inflight) == 0) {
+ if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) {
IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT);
rc = signal_completed_replay(imp);
if (rc)
}
if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) {
- if (atomic_read(&imp->imp_replay_inflight) == 0) {
+ if (cfs_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,
+ obd2cli_tgt(imp->imp_obd),
imp->imp_connection->c_remote_uuid.uuid);
rc = ptlrpc_resend(imp);
GOTO(out, rc);
IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL);
ptlrpc_activate_import(imp);
- CWARN("%s: connection restored to %s@%s, "
- "%d/%d req/lock replayed\n",
- imp->imp_obd->obd_name,
- imp->imp_target_uuid.uuid,
- imp->imp_connection->c_remote_uuid.uuid,
- imp->imp_reqs_replayed,
- imp->imp_locks_replayed);
+
+ deuuidify(obd2cli_tgt(imp->imp_obd), NULL,
+ &target_start, &target_len);
+ LCONSOLE_INFO("%s: Connection restored to service %.*s "
+ "using nid %s.\n", imp->imp_obd->obd_name,
+ target_len, target_start,
+ libcfs_nid2str(imp->imp_connection->c_peer.nid));
}
if (imp->imp_state == LUSTRE_IMP_FULL) {
- wake_up(&imp->imp_recovery_waitq);
+ cfs_waitq_broadcast(&imp->imp_recovery_waitq);
ptlrpc_wake_delayed(imp);
}
- out:
+out:
RETURN(rc);
}
-static int back_to_sleep(void *unused)
+int ptlrpc_disconnect_import(struct obd_import *imp, int noclose)
{
- return 0;
-}
-
-int ptlrpc_disconnect_import(struct obd_import *imp)
-{
- struct ptlrpc_request *request;
- int rq_opc;
- int rc = 0;
- unsigned long flags;
+ struct ptlrpc_request *req;
+ int rq_opc, rc = 0;
+ int nowait = imp->imp_obd->obd_force;
ENTRY;
+ if (nowait)
+ GOTO(set_state, rc);
+
switch (imp->imp_connect_op) {
case OST_CONNECT: rq_opc = OST_DISCONNECT; break;
case MDS_CONNECT: rq_opc = MDS_DISCONNECT; break;
- case MGMT_CONNECT: rq_opc = MGMT_DISCONNECT; break;
+ case MGS_CONNECT: rq_opc = MGS_DISCONNECT; break;
default:
CERROR("don't know how to disconnect from %s (connect_op %d)\n",
- imp->imp_target_uuid.uuid, imp->imp_connect_op);
+ obd2cli_tgt(imp->imp_obd), imp->imp_connect_op);
RETURN(-EINVAL);
}
-
if (ptlrpc_import_in_recovery(imp)) {
struct l_wait_info lwi;
- unsigned long timeout;
- if (imp->imp_server_timeout)
- timeout = obd_timeout / 2;
- else
- timeout = obd_timeout;
- timeout = MAX(timeout * HZ, 1);
- lwi = LWI_TIMEOUT_INTR(obd_timeout, back_to_sleep, NULL, NULL);
- rc = l_wait_event(imp->imp_recovery_waitq,
+ cfs_duration_t timeout;
+
+
+ if (AT_OFF) {
+ if (imp->imp_server_timeout)
+ timeout = cfs_time_seconds(obd_timeout / 2);
+ else
+ timeout = cfs_time_seconds(obd_timeout);
+ } else {
+ int idx = import_at_get_index(imp,
+ imp->imp_client->cli_request_portal);
+ timeout = cfs_time_seconds(
+ at_get(&imp->imp_at.iat_service_estimate[idx]));
+ }
+
+ lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout),
+ back_to_sleep, LWI_ON_SIGNAL_NOOP, 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) {
+ cfs_spin_lock(&imp->imp_lock);
+ if (imp->imp_state != LUSTRE_IMP_FULL)
GOTO(out, 0);
- }
- spin_unlock_irqrestore(&imp->imp_lock, flags);
- request = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, rq_opc,
- 0, NULL, NULL);
- if (request) {
- /* For non-replayable connections, don't attempt
- reconnect if this fails */
- if (!imp->imp_replayable) {
- request->rq_no_resend = 1;
- IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
- request->rq_send_state = LUSTRE_IMP_CONNECTING;
- }
- request->rq_replen = lustre_msg_size(0, NULL);
- rc = ptlrpc_queue_wait(request);
- ptlrpc_req_finished(request);
+ cfs_spin_unlock(&imp->imp_lock);
+
+ req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_DISCONNECT,
+ LUSTRE_OBD_VERSION, rq_opc);
+ if (req) {
+ /* We are disconnecting, do not retry a failed DISCONNECT rpc if
+ * it fails. We can get through the above with a down server
+ * if the client doesn't know the server is gone yet. */
+ req->rq_no_resend = 1;
+
+#ifndef CRAY_XT3
+ /* We want client umounts to happen quickly, no matter the
+ server state... */
+ req->rq_timeout = min_t(int, req->rq_timeout,
+ INITIAL_CONNECT_TIMEOUT);
+#else
+ /* ... but we always want liblustre clients to nicely
+ disconnect, so only use the adaptive value. */
+ if (AT_OFF)
+ req->rq_timeout = obd_timeout / 3;
+#endif
+
+ IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING);
+ req->rq_send_state = LUSTRE_IMP_CONNECTING;
+ ptlrpc_request_set_replen(req);
+ rc = ptlrpc_queue_wait(req);
+ ptlrpc_req_finished(req);
}
- spin_lock_irqsave(&imp->imp_lock, flags);
+set_state:
+ cfs_spin_lock(&imp->imp_lock);
out:
- IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
+ if (noclose)
+ IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON);
+ else
+ IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
memset(&imp->imp_remote_handle, 0, sizeof(imp->imp_remote_handle));
- imp->imp_conn_cnt = 0;
- spin_unlock_irqrestore(&imp->imp_lock, flags);
+ /* Try all connections in the future - bz 12758 */
+ imp->imp_last_recon = 0;
+ cfs_spin_unlock(&imp->imp_lock);
RETURN(rc);
}
+void ptlrpc_cleanup_imp(struct obd_import *imp)
+{
+ ENTRY;
+
+ cfs_spin_lock(&imp->imp_lock);
+ IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CLOSED);
+ imp->imp_generation++;
+ cfs_spin_unlock(&imp->imp_lock);
+ ptlrpc_abort_inflight(imp);
+
+ EXIT;
+}
+
+/* Adaptive Timeout utils */
+extern unsigned int at_min, at_max, at_history;
+
+/* Bin into timeslices using AT_BINS bins.
+ This gives us a max of the last binlimit*AT_BINS secs without the storage,
+ but still smoothing out a return to normalcy from a slow response.
+ (E.g. remember the maximum latency in each minute of the last 4 minutes.) */
+int at_measured(struct adaptive_timeout *at, unsigned int val)
+{
+ unsigned int old = at->at_current;
+ time_t now = cfs_time_current_sec();
+ time_t binlimit = max_t(time_t, at_history / AT_BINS, 1);
+
+ LASSERT(at);
+ CDEBUG(D_OTHER, "add %u to %p time=%lu v=%u (%u %u %u %u)\n",
+ val, at, now - at->at_binstart, at->at_current,
+ at->at_hist[0], at->at_hist[1], at->at_hist[2], at->at_hist[3]);
+
+ if (val == 0)
+ /* 0's don't count, because we never want our timeout to
+ drop to 0, and because 0 could mean an error */
+ return 0;
+
+ cfs_spin_lock(&at->at_lock);
+
+ if (unlikely(at->at_binstart == 0)) {
+ /* Special case to remove default from history */
+ at->at_current = val;
+ at->at_worst_ever = val;
+ at->at_worst_time = now;
+ at->at_hist[0] = val;
+ at->at_binstart = now;
+ } else if (now - at->at_binstart < binlimit ) {
+ /* in bin 0 */
+ at->at_hist[0] = max(val, at->at_hist[0]);
+ at->at_current = max(val, at->at_current);
+ } else {
+ int i, shift;
+ unsigned int maxv = val;
+ /* move bins over */
+ shift = (now - at->at_binstart) / binlimit;
+ LASSERT(shift > 0);
+ for(i = AT_BINS - 1; i >= 0; i--) {
+ if (i >= shift) {
+ at->at_hist[i] = at->at_hist[i - shift];
+ maxv = max(maxv, at->at_hist[i]);
+ } else {
+ at->at_hist[i] = 0;
+ }
+ }
+ at->at_hist[0] = val;
+ at->at_current = maxv;
+ at->at_binstart += shift * binlimit;
+ }
+
+ if (at->at_current > at->at_worst_ever) {
+ at->at_worst_ever = at->at_current;
+ at->at_worst_time = now;
+ }
+
+ if (at->at_flags & AT_FLG_NOHIST)
+ /* Only keep last reported val; keeping the rest of the history
+ for proc only */
+ at->at_current = val;
+
+ if (at_max > 0)
+ at->at_current = min(at->at_current, at_max);
+ at->at_current = max(at->at_current, at_min);
+
+ if (at->at_current != old)
+ CDEBUG(D_OTHER, "AT %p change: old=%u new=%u delta=%d "
+ "(val=%u) hist %u %u %u %u\n", at,
+ old, at->at_current, at->at_current - old, val,
+ at->at_hist[0], at->at_hist[1], at->at_hist[2],
+ at->at_hist[3]);
+
+ /* if we changed, report the old value */
+ old = (at->at_current != old) ? old : 0;
+
+ cfs_spin_unlock(&at->at_lock);
+ return old;
+}
+
+/* Find the imp_at index for a given portal; assign if space available */
+int import_at_get_index(struct obd_import *imp, int portal)
+{
+ struct imp_at *at = &imp->imp_at;
+ int i;
+
+ for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
+ if (at->iat_portal[i] == portal)
+ return i;
+ if (at->iat_portal[i] == 0)
+ /* unused */
+ break;
+ }
+
+ /* Not found in list, add it under a lock */
+ cfs_spin_lock(&imp->imp_lock);
+
+ /* Check unused under lock */
+ for (; i < IMP_AT_MAX_PORTALS; i++) {
+ if (at->iat_portal[i] == portal)
+ goto out;
+ if (at->iat_portal[i] == 0)
+ /* unused */
+ break;
+ }
+
+ /* Not enough portals? */
+ LASSERT(i < IMP_AT_MAX_PORTALS);
+
+ at->iat_portal[i] = portal;
+out:
+ cfs_spin_unlock(&imp->imp_lock);
+ return i;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff