X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fptlrpc%2Fimport.c;h=12a19db0ae004b2d82515c744bf76a0037621244;hp=7ed3c170403007e60c11383fbb7195b50e995727;hb=934ed595e3e1e24086e26435ad59dc1058d2926d;hpb=c7e34b11887dc6bdf9b294925462469519ddf1a1 diff --git a/lustre/ptlrpc/import.c b/lustre/ptlrpc/import.c index 7ed3c17..12a19db 100644 --- a/lustre/ptlrpc/import.c +++ b/lustre/ptlrpc/import.c @@ -1,41 +1,56 @@ /* -*- 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 + * 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 */ #define DEBUG_SUBSYSTEM S_RPC -#ifdef __KERNEL__ -# include -# include -# include -#else +#ifndef __KERNEL__ # include #endif -#include -#include -#include -#include -#include -#include -#include +#include +#include +#include +#include +#include +#include +#include +#include #include "ptlrpc_internal.h" @@ -44,29 +59,39 @@ struct ptlrpc_connect_async_args { 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); @@ -77,61 +102,159 @@ 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) { + 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; } /* @@ -139,109 +262,351 @@ void ptlrpc_deactivate_import(struct obd_import *imp) * 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; - int inflight = 0; + unsigned int timeout; int rc; - if (!imp->imp_invalid) + cfs_atomic_inc(&imp->imp_inval_count); + + /* + * 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 (!imp->imp_invalid || imp->imp_obd->obd_no_recov) ptlrpc_deactivate_import(imp); LASSERT(imp->imp_invalid); - if (in_rpc) - inflight = 1; - /* wait for all requests to error out and call completion callbacks */ - lwi = LWI_TIMEOUT_INTR(MAX(obd_timeout * HZ, 1), NULL, - NULL, NULL); - rc = l_wait_event(imp->imp_recovery_waitq, - (atomic_read(&imp->imp_inflight) == inflight), - &lwi); + /* 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; + } - if (rc) - CERROR("%s: rc = %d waiting for callback (%d != %d)\n", - imp->imp_target_uuid.uuid, rc, - atomic_read(&imp->imp_inflight), inflight); + 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); } -static void ptlrpc_activate_import(struct obd_import *imp) +/* 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); } -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; } -int ptlrpc_connect_import(struct obd_import *imp, char * new_uuid) +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 = NULL, *conn; + struct obd_export *dlmexp; + int tried_all = 1; + ENTRY; + + cfs_spin_lock(&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); + } + + 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 (!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); + + /* 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_add(&imp->imp_at.iat_net_latency, + at_get(&imp->imp_at.iat_net_latency) + + CONNECTION_SWITCH_INC); + } + 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_connection_put(dlmexp->exp_connection); + dlmexp->exp_connection = ptlrpc_connection_addref(imp_conn->oic_conn); + class_export_put(dlmexp); + + 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 + */ +static int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno) +{ + struct ptlrpc_request *req; + cfs_list_t *tmp; + + if (cfs_list_empty(&imp->imp_replay_list)) + return 0; + tmp = imp->imp_replay_list.next; + 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) { struct obd_device *obd = imp->imp_obd; int initial_connect = 0; - int rc; + int set_transno = 0; __u64 committed_before_reconnect = 0; struct ptlrpc_request *request; - 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}; + 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); } @@ -249,76 +614,124 @@ int ptlrpc_connect_import(struct obd_import *imp, char * new_uuid) IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING); imp->imp_conn_cnt++; - imp->imp_last_replay_transno = 0; + 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;; - - } + 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 ptlrpc_connection *conn; struct obd_uuid uuid; - struct obd_export *dlmexp; obd_str2uuid(&uuid, new_uuid); + rc = import_set_conn_priority(imp, &uuid); + if (rc) + GOTO(out, rc); + } - conn = ptlrpc_uuid_to_connection(&uuid); - if (!conn) - GOTO(out, rc = -ENOENT); + rc = import_select_connection(imp); + if (rc) + GOTO(out, rc); - 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); + /* 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); + } + } - /* 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; + rc = sptlrpc_import_sec_adapt(imp, NULL, 0); + if (rc) + GOTO(out, rc); - dlmexp = class_conn2export(&imp->imp_dlm_handle); + /* 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; - LASSERT(dlmexp != NULL); + rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd, + &obd->obd_uuid, &imp->imp_connect_data, NULL); + if (rc) + GOTO(out, rc); - if (dlmexp->exp_connection) - ptlrpc_put_connection(dlmexp->exp_connection); - dlmexp->exp_connection = ptlrpc_connection_addref(conn); - class_export_put(dlmexp); + request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT); + if (request == NULL) + GOTO(out, rc = -ENOMEM); + rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION, + imp->imp_connect_op, bufs, NULL); + if (rc) { + ptlrpc_request_free(request); + GOTO(out, rc); } - request = ptlrpc_prep_req(imp, imp->imp_connect_op, 3, size, tmp); - if (!request) - GOTO(out, rc = -ENOMEM); + /* 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 + 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(0, NULL); + /* 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) + if (aa->pcaa_initial_connect) { + 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); + } + + if (set_transno) + lustre_msg_add_op_flags(request->rq_reqmsg, + MSG_CONNECT_TRANSNO); - 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; out: if (rc != 0) { @@ -327,79 +740,200 @@ out: RETURN(rc); } +EXPORT_SYMBOL(ptlrpc_connect_import); -static int ptlrpc_connect_interpret(struct ptlrpc_request *request, - void * data, int rc) +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); msg_flags = lustre_msg_get_op_flags(request->rq_repmsg); + /* 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); } - imp->imp_remote_handle = request->rq_repmsg->handle; - IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL); + + /* 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 { - CERROR("reconnected to %s@%s after partition\n", - imp->imp_target_uuid.uuid, + CDEBUG(D_HA, "reconnected to %s@%s after partition\n", + obd2cli_tgt(imp->imp_obd), imp->imp_connection->c_remote_uuid.uuid); } - if (imp->imp_invalid) + 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 + } else if (MSG_CONNECT_RECOVERING & msg_flags) { + CDEBUG(D_HA, "%s: reconnected to %s during replay\n", + 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 { - 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); } @@ -409,13 +943,14 @@ static int ptlrpc_connect_interpret(struct ptlrpc_request *request, "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) < + 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: @@ -424,78 +959,365 @@ 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; + + 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); } - CDEBUG(D_ERROR, "recovery of %s on %s failed (%d)\n", - imp->imp_target_uuid.uuid, + + 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", + 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); - ptlrpc_import_recovery_state_machine(req->rq_import); + 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 { + if (req->rq_import->imp_vbr_failed) { + CDEBUG(D_WARNING, + "%s: version recovery fails, reconnecting\n", + req->rq_import->imp_obd->obd_name); + cfs_spin_lock(&req->rq_import->imp_lock); + req->rq_import->imp_vbr_failed = 0; + cfs_spin_unlock(&req->rq_import->imp_lock); + } 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); + } + 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); + LASSERT(cfs_atomic_read(&imp->imp_replay_inflight) == 0); + cfs_atomic_inc(&imp->imp_replay_inflight); - req = ptlrpc_prep_req(imp, OBD_PING, 0, NULL, NULL); - if (!req) + 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_LAST_REPLAY; - 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); +} + +#ifdef __KERNEL__ +static int ptlrpc_invalidate_import_thread(void *data) +{ + struct obd_import *imp = data; + + ENTRY; + + cfs_daemonize_ctxt("ll_imp_inval"); + + CDEBUG(D_HA, "thread invalidate import %s to %s@%s\n", + imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd), + imp->imp_connection->c_remote_uuid.uuid); + + 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 ptlrpc_import_recovery_state_machine(struct obd_import *imp) { 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); - ptlrpc_invalidate_import(imp, 1); +#ifdef __KERNEL__ + /* 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); + } else { + rc = 0; + } + RETURN(rc); +#else + 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) @@ -505,7 +1327,7 @@ int ptlrpc_import_recovery_state_machine(struct obd_import *imp) } 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) @@ -515,14 +1337,14 @@ int ptlrpc_import_recovery_state_machine(struct obd_import *imp) } 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); @@ -530,76 +1352,248 @@ int ptlrpc_import_recovery_state_machine(struct obd_import *imp) GOTO(out, rc); IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL); ptlrpc_activate_import(imp); + + 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) { - return 0; + return 0; } -int ptlrpc_disconnect_import(struct obd_import *imp) +int ptlrpc_disconnect_import(struct obd_import *imp, int noclose) { - 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; - lwi = LWI_TIMEOUT_INTR(MAX(obd_timeout * HZ, 1), back_to_sleep, - NULL, NULL); + 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, 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)); - 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_add(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; +}