diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/ptlrpc/import.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/ptlrpc/import.c | 1676 |
1 files changed, 0 insertions, 1676 deletions
diff --git a/drivers/staging/lustre/lustre/ptlrpc/import.c b/drivers/staging/lustre/lustre/ptlrpc/import.c deleted file mode 100644 index a2c4fc3488b1..000000000000 --- a/drivers/staging/lustre/lustre/ptlrpc/import.c +++ /dev/null @@ -1,1676 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * 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. - * - * 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 - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, Intel Corporation. - */ -/* - * 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 <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" - -struct ptlrpc_connect_async_args { - __u64 pcaa_peer_committed; - int pcaa_initial_connect; -}; - -/** - * Updates import \a imp current state to provided \a state value - * Helper function. Must be called under imp_lock. - */ -static void __import_set_state(struct obd_import *imp, - enum lustre_imp_state state) -{ - switch (state) { - case LUSTRE_IMP_CLOSED: - case LUSTRE_IMP_NEW: - case LUSTRE_IMP_DISCON: - case LUSTRE_IMP_CONNECTING: - break; - case LUSTRE_IMP_REPLAY_WAIT: - imp->imp_replay_state = LUSTRE_IMP_REPLAY_LOCKS; - break; - default: - imp->imp_replay_state = LUSTRE_IMP_REPLAY; - } - - 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 = - ktime_get_real_seconds(); - 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, obd2cli_tgt(imp->imp_obd), \ - ptlrpc_import_state_name(imp->imp_state), \ - ptlrpc_import_state_name(state)); \ - __import_set_state(imp, state); \ - } \ -} while (0) - -#define IMPORT_SET_STATE(imp, state) \ -do { \ - spin_lock(&imp->imp_lock); \ - IMPORT_SET_STATE_NOLOCK(imp, state); \ - spin_unlock(&imp->imp_lock); \ -} while (0) - -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); - -/* Only this function is allowed to change the import state when it is - * CLOSED. I would rather refcount the import and free it after - * disconnection like we do with exports. To do that, the client_obd - * will need to save the peer info somewhere other than in the import, - * though. - */ -int ptlrpc_init_import(struct obd_import *imp) -{ - spin_lock(&imp->imp_lock); - - imp->imp_generation++; - imp->imp_state = LUSTRE_IMP_NEW; - - 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, __u32 conn_cnt) -{ - int rc = 0; - - spin_lock(&imp->imp_lock); - - 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 %.*s (at %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 %.*s (at %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)); - } - IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON); - 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(&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) -{ - CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd)); - - spin_lock(&imp->imp_lock); - imp->imp_invalid = 1; - imp->imp_generation++; - spin_unlock(&imp->imp_lock); - - ptlrpc_abort_inflight(imp); - obd_import_event(imp->imp_obd, imp, IMP_EVENT_INACTIVE); -} -EXPORT_SYMBOL(ptlrpc_deactivate_import); - -static unsigned int -ptlrpc_inflight_deadline(struct ptlrpc_request *req, time64_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) -{ - time64_t now = ktime_get_real_seconds(); - struct ptlrpc_request *req, *n; - unsigned int timeout = 0; - - spin_lock(&imp->imp_lock); - list_for_each_entry_safe(req, n, &imp->imp_sending_list, rq_list) - timeout = max(ptlrpc_inflight_deadline(req, now), timeout); - - spin_unlock(&imp->imp_lock); - return timeout; -} - -/** - * This function will invalidate the import, if necessary, then block - * for all the RPC completions, and finally notify the obd to - * invalidate its state (ie cancel locks, clear pending requests, - * etc). - */ -void ptlrpc_invalidate_import(struct obd_import *imp) -{ - struct ptlrpc_request *req, *n; - unsigned int timeout; - int rc; - - atomic_inc(&imp->imp_inval_count); - - if (!imp->imp_invalid || imp->imp_obd->obd_no_recov) - ptlrpc_deactivate_import(imp); - - CFS_FAIL_TIMEOUT(OBD_FAIL_MGS_CONNECT_NET, 3 * cfs_fail_val / 2); - LASSERT(imp->imp_invalid); - - /* 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. - */ - rc = wait_event_idle_timeout(imp->imp_recovery_waitq, - atomic_read(&imp->imp_inflight) == 0, - obd_timeout * HZ); - - if (rc == 0) { - const char *cli_tgt = obd2cli_tgt(imp->imp_obd); - - CERROR("%s: timeout waiting for callback (%d != 0)\n", - cli_tgt, - atomic_read(&imp->imp_inflight)); - - spin_lock(&imp->imp_lock); - if (atomic_read(&imp->imp_inflight) == 0) { - int count = 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 { - list_for_each_entry_safe(req, n, - &imp->imp_sending_list, rq_list) { - DEBUG_REQ(D_ERROR, req, - "still on sending list"); - } - list_for_each_entry_safe(req, n, - &imp->imp_delayed_list, rq_list) { - DEBUG_REQ(D_ERROR, req, - "still on delayed list"); - } - - CERROR("%s: Unregistering RPCs found (%d). Network is sluggish? Waiting them to error out.\n", - cli_tgt, - atomic_read(&imp-> - imp_unregistering)); - } - spin_unlock(&imp->imp_lock); - } - } while (rc == 0); - - /* - * Let's additionally check that no new rpcs added to import in - * "invalidate" state. - */ - LASSERT(atomic_read(&imp->imp_inflight) == 0); - obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE); - sptlrpc_import_flush_all_ctx(imp); - - atomic_dec(&imp->imp_inval_count); - wake_up_all(&imp->imp_recovery_waitq); -} -EXPORT_SYMBOL(ptlrpc_invalidate_import); - -/* unset imp_invalid */ -void ptlrpc_activate_import(struct obd_import *imp) -{ - struct obd_device *obd = imp->imp_obd; - - spin_lock(&imp->imp_lock); - if (imp->imp_deactive != 0) { - spin_unlock(&imp->imp_lock); - return; - } - - imp->imp_invalid = 0; - spin_unlock(&imp->imp_lock); - obd_import_event(obd, imp, IMP_EVENT_ACTIVE); -} -EXPORT_SYMBOL(ptlrpc_activate_import); - -void ptlrpc_pinger_force(struct obd_import *imp) -{ - CDEBUG(D_HA, "%s: waking up pinger s:%s\n", obd2cli_tgt(imp->imp_obd), - ptlrpc_import_state_name(imp->imp_state)); - - spin_lock(&imp->imp_lock); - imp->imp_force_verify = 1; - spin_unlock(&imp->imp_lock); - - if (imp->imp_state != LUSTRE_IMP_CONNECTING) - ptlrpc_pinger_wake_up(); -} -EXPORT_SYMBOL(ptlrpc_pinger_force); - -void ptlrpc_fail_import(struct obd_import *imp, __u32 conn_cnt) -{ - 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", - obd2cli_tgt(imp->imp_obd), - imp->imp_connection->c_remote_uuid.uuid, - imp->imp_obd->obd_name); - ptlrpc_deactivate_import(imp); - } - - ptlrpc_pinger_force(imp); - } -} - -int ptlrpc_reconnect_import(struct obd_import *imp) -{ - int rc; - - ptlrpc_pinger_force(imp); - - CDEBUG(D_HA, "%s: recovery started, waiting %u seconds\n", - obd2cli_tgt(imp->imp_obd), obd_timeout); - - rc = wait_event_idle_timeout(imp->imp_recovery_waitq, - !ptlrpc_import_in_recovery(imp), - obd_timeout * HZ); - CDEBUG(D_HA, "%s: recovery finished s:%s\n", obd2cli_tgt(imp->imp_obd), - ptlrpc_import_state_name(imp->imp_state)); - return rc == 0 ? -ETIMEDOUT : 0; -} -EXPORT_SYMBOL(ptlrpc_reconnect_import); - -/** - * Connection on import \a imp is changed to another one (if more than one is - * present). We typically chose connection that we have not tried to connect to - * the longest - */ -static int import_select_connection(struct obd_import *imp) -{ - struct obd_import_conn *imp_conn = NULL, *conn; - struct obd_export *dlmexp; - char *target_start; - int target_len, tried_all = 1; - - spin_lock(&imp->imp_lock); - - if (list_empty(&imp->imp_conn_list)) { - CERROR("%s: no connections available\n", - imp->imp_obd->obd_name); - spin_unlock(&imp->imp_lock); - return -EINVAL; - } - - list_for_each_entry(conn, &imp->imp_conn_list, oic_item) { - CDEBUG(D_HA, "%s: connect to NID %s last attempt %llu\n", - imp->imp_obd->obd_name, - libcfs_nid2str(conn->oic_conn->c_peer.nid), - conn->oic_last_attempt); - - /* 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)) { - struct adaptive_timeout *at = &imp->imp_at.iat_net_latency; - - if (at_get(at) < CONNECTION_SWITCH_MAX) { - at_measured(at, at_get(at) + CONNECTION_SWITCH_INC); - if (at_get(at) > CONNECTION_SWITCH_MAX) - at_reset(at, CONNECTION_SWITCH_MAX); - } - LASSERT(imp_conn->oic_last_attempt); - CDEBUG(D_HA, "%s: tried all connections, increasing latency to %ds\n", - imp->imp_obd->obd_name, at_get(at)); - } - - imp_conn->oic_last_attempt = cfs_time_current_64(); - - /* switch connection, don't mind if it's same as the current one */ - ptlrpc_connection_put(imp->imp_connection); - imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn); - - dlmexp = class_conn2export(&imp->imp_dlm_handle); - 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) { - deuuidify(obd2cli_tgt(imp->imp_obd), NULL, - &target_start, &target_len); - - CDEBUG(D_HA, "%s: Connection changing to %.*s (at %s)\n", - imp->imp_obd->obd_name, - target_len, target_start, - 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)); - - 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; - - /* The requests in committed_list always have smaller transnos than - * the requests in replay_list - */ - if (!list_empty(&imp->imp_committed_list)) { - req = list_first_entry(&imp->imp_committed_list, - struct ptlrpc_request, rq_replay_list); - *transno = req->rq_transno; - if (req->rq_transno == 0) { - DEBUG_REQ(D_ERROR, req, - "zero transno in committed_list"); - LBUG(); - } - return 1; - } - if (!list_empty(&imp->imp_replay_list)) { - req = list_first_entry(&imp->imp_replay_list, - struct ptlrpc_request, rq_replay_list); - *transno = req->rq_transno; - if (req->rq_transno == 0) { - DEBUG_REQ(D_ERROR, req, "zero transno in replay_list"); - LBUG(); - } - return 1; - } - return 0; -} - -/** - * Attempt to (re)connect import \a imp. This includes all preparations, - * initializing CONNECT RPC request and passing it to ptlrpcd for - * actual sending. - * Returns 0 on success or error code. - */ -int ptlrpc_connect_import(struct obd_import *imp) -{ - struct obd_device *obd = imp->imp_obd; - int initial_connect = 0; - int set_transno = 0; - __u64 committed_before_reconnect = 0; - struct ptlrpc_request *request; - 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; - int rc; - - spin_lock(&imp->imp_lock); - if (imp->imp_state == LUSTRE_IMP_CLOSED) { - 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(&imp->imp_lock); - CERROR("already connected\n"); - return 0; - } else if (imp->imp_state == LUSTRE_IMP_CONNECTING || - imp->imp_connected) { - 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 (!lustre_handle_is_used(&imp->imp_remote_handle)) - initial_connect = 1; - else - committed_before_reconnect = imp->imp_peer_committed_transno; - - set_transno = ptlrpc_first_transno(imp, - &imp->imp_connect_data.ocd_transno); - spin_unlock(&imp->imp_lock); - - rc = import_select_connection(imp); - if (rc) - goto out; - - rc = sptlrpc_import_sec_adapt(imp, NULL, NULL); - if (rc) - goto out; - - /* 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; - /* Reset ocd_version each time so the server knows the exact versions */ - imp->imp_connect_data.ocd_version = LUSTRE_VERSION_CODE; - 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; - - request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT); - if (!request) { - rc = -ENOMEM; - goto out; - } - - rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION, - imp->imp_connect_op, bufs, NULL); - if (rc) { - ptlrpc_request_free(request); - goto out; - } - - /* 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); - - request->rq_no_resend = 1; - request->rq_no_delay = 1; - request->rq_send_state = LUSTRE_IMP_CONNECTING; - /* 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; - - BUILD_BUG_ON(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) { - spin_lock(&imp->imp_lock); - imp->imp_replayable = 1; - 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); - - DEBUG_REQ(D_RPCTRACE, request, "(re)connect request (timeout %d)", - request->rq_timeout); - ptlrpcd_add_req(request); - rc = 0; -out: - if (rc != 0) - IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON); - - return rc; -} -EXPORT_SYMBOL(ptlrpc_connect_import); - -static void ptlrpc_maybe_ping_import_soon(struct obd_import *imp) -{ - int force_verify; - - spin_lock(&imp->imp_lock); - force_verify = imp->imp_force_verify != 0; - spin_unlock(&imp->imp_lock); - - if (force_verify) - ptlrpc_pinger_wake_up(); -} - -static int ptlrpc_busy_reconnect(int rc) -{ - return (rc == -EBUSY) || (rc == -EAGAIN); -} - -static int ptlrpc_connect_set_flags(struct obd_import *imp, - struct obd_connect_data *ocd, - u64 old_connect_flags, - struct obd_export *exp, int init_connect) -{ - struct client_obd *cli = &imp->imp_obd->u.cli; - static bool warned; - - if ((imp->imp_connect_flags_orig & OBD_CONNECT_IBITS) && - !(ocd->ocd_connect_flags & OBD_CONNECT_IBITS)) { - LCONSOLE_WARN("%s: MDS %s does not support ibits lock, either very old or invalid: requested %#llx, replied %#llx\n", - imp->imp_obd->obd_name, - imp->imp_connection->c_remote_uuid.uuid, - imp->imp_connect_flags_orig, - ocd->ocd_connect_flags); - return -EPROTO; - } - - spin_lock(&imp->imp_lock); - list_del(&imp->imp_conn_current->oic_item); - list_add(&imp->imp_conn_current->oic_item, &imp->imp_conn_list); - imp->imp_last_success_conn = imp->imp_conn_current->oic_last_attempt; - - spin_unlock(&imp->imp_lock); - - if (!warned && (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 - */ - const char *older = "older than client. Consider upgrading server"; - const char *newer = "newer than client. Consider recompiling application"; - - 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); - warned = true; - } - -#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0) - /* - * Check if server has LU-1252 fix applied to not always swab - * the IR MNE entries. Do this only once per connection. This - * fixup is version-limited, because we don't want to carry the - * OBD_CONNECT_MNE_SWAB flag around forever, just so long as we - * need interop with unpatched 2.2 servers. For newer servers, - * the client will do MNE swabbing only as needed. LU-1644 - */ - if (unlikely((ocd->ocd_connect_flags & OBD_CONNECT_VERSION) && - !(ocd->ocd_connect_flags & OBD_CONNECT_MNE_SWAB) && - OBD_OCD_VERSION_MAJOR(ocd->ocd_version) == 2 && - OBD_OCD_VERSION_MINOR(ocd->ocd_version) == 2 && - OBD_OCD_VERSION_PATCH(ocd->ocd_version) < 55 && - !strcmp(imp->imp_obd->obd_type->typ_name, - LUSTRE_MGC_NAME))) - imp->imp_need_mne_swab = 1; - else /* clear if server was upgraded since last connect */ - imp->imp_need_mne_swab = 0; -#endif - - 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 & cksum_types_supported_client())) { - LCONSOLE_WARN("The negotiation of the checksum algorithm to use with server %s failed (%x/%x), disabling checksums\n", - obd2cli_tgt(imp->imp_obd), - ocd->ocd_cksum_types, - cksum_types_supported_client()); - cli->cl_checksum = 0; - cli->cl_supp_cksum_types = OBD_CKSUM_ADLER; - } else { - cli->cl_supp_cksum_types = ocd->ocd_cksum_types; - } - } else { - /* - * The server does not support OBD_CONNECT_CKSUM. - * Enforce ADLER for backward compatibility - */ - cli->cl_supp_cksum_types = OBD_CKSUM_ADLER; - } - cli->cl_cksum_type = cksum_type_select(cli->cl_supp_cksum_types); - - if (ocd->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) - cli->cl_max_pages_per_rpc = - min(ocd->ocd_brw_size >> PAGE_SHIFT, - cli->cl_max_pages_per_rpc); - else if (imp->imp_connect_op == MDS_CONNECT || - imp->imp_connect_op == MGS_CONNECT) - cli->cl_max_pages_per_rpc = 1; - - LASSERT((cli->cl_max_pages_per_rpc <= PTLRPC_MAX_BRW_PAGES) && - (cli->cl_max_pages_per_rpc > 0)); - - client_adjust_max_dirty(cli); - - /* - * Update client max modify RPCs in flight with value returned - * by the server - */ - if (ocd->ocd_connect_flags & OBD_CONNECT_MULTIMODRPCS) - cli->cl_max_mod_rpcs_in_flight = min( - cli->cl_max_mod_rpcs_in_flight, - ocd->ocd_maxmodrpcs); - else - cli->cl_max_mod_rpcs_in_flight = 1; - - /* - * 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_connect_flags(exp) || init_connect) { - CDEBUG(D_HA, "%s: Resetting ns_connect_flags to server flags: %#llx\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) - /* - * 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; - - imp->imp_msghdr_flags |= MSGHDR_CKSUM_INCOMPAT18; - - return 0; -} - -/** - * Add all replay requests back to unreplied list before start replay, - * so that we can make sure the known replied XID is always increased - * only even if when replaying requests. - */ -static void ptlrpc_prepare_replay(struct obd_import *imp) -{ - struct ptlrpc_request *req; - - if (imp->imp_state != LUSTRE_IMP_REPLAY || - imp->imp_resend_replay) - return; - - /* - * If the server was restart during repaly, the requests may - * have been added to the unreplied list in former replay. - */ - spin_lock(&imp->imp_lock); - - list_for_each_entry(req, &imp->imp_committed_list, rq_replay_list) { - if (list_empty(&req->rq_unreplied_list)) - ptlrpc_add_unreplied(req); - } - - list_for_each_entry(req, &imp->imp_replay_list, rq_replay_list) { - if (list_empty(&req->rq_unreplied_list)) - ptlrpc_add_unreplied(req); - } - - imp->imp_known_replied_xid = ptlrpc_known_replied_xid(imp); - spin_unlock(&imp->imp_lock); -} - -/** - * interpret_reply callback for connect RPCs. - * Looks into returned status of connect operation and decides - * what to do with the import - i.e enter recovery, promote it to - * full state for normal operations of disconnect it due to an error. - */ -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 lustre_handle old_hdl; - __u64 old_connect_flags; - int msg_flags; - struct obd_connect_data *ocd; - struct obd_export *exp; - int ret; - - spin_lock(&imp->imp_lock); - if (imp->imp_state == LUSTRE_IMP_CLOSED) { - imp->imp_connect_tried = 1; - spin_unlock(&imp->imp_lock); - return 0; - } - - if (rc) { - /* if this reconnect to busy export - not need select new target - * for connecting - */ - imp->imp_force_reconnect = ptlrpc_busy_reconnect(rc); - spin_unlock(&imp->imp_lock); - ptlrpc_maybe_ping_import_soon(imp); - goto out; - } - - /* - * LU-7558: indicate that we are interpretting connect reply, - * pltrpc_connect_import() will not try to reconnect until - * interpret will finish. - */ - imp->imp_connected = 1; - spin_unlock(&imp->imp_lock); - - LASSERT(imp->imp_conn_current); - - msg_flags = lustre_msg_get_op_flags(request->rq_repmsg); - - 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); - - if (!ocd) { - CERROR("%s: no connect data from server\n", - imp->imp_obd->obd_name); - rc = -EPROTO; - goto out; - } - - spin_lock(&imp->imp_lock); - - /* All imports are pingable */ - imp->imp_pingable = 1; - imp->imp_force_reconnect = 0; - imp->imp_force_verify = 0; - - imp->imp_connect_data = *ocd; - - CDEBUG(D_HA, "%s: connect to target with instance %u\n", - imp->imp_obd->obd_name, ocd->ocd_instance); - exp = class_conn2export(&imp->imp_dlm_handle); - - spin_unlock(&imp->imp_lock); - - if (!exp) { - /* This could happen if export is cleaned during the - * connect attempt - */ - CERROR("%s: missing export after connect\n", - imp->imp_obd->obd_name); - rc = -ENODEV; - goto out; - } - - /* check that server granted subset of flags we asked for. */ - if ((ocd->ocd_connect_flags & imp->imp_connect_flags_orig) != - ocd->ocd_connect_flags) { - CERROR("%s: Server didn't grant the asked for subset of flags: asked=%#llx granted=%#llx\n", - imp->imp_obd->obd_name, imp->imp_connect_flags_orig, - ocd->ocd_connect_flags); - rc = -EPROTO; - goto out; - } - - old_connect_flags = exp_connect_flags(exp); - exp->exp_connect_data = *ocd; - imp->imp_obd->obd_self_export->exp_connect_data = *ocd; - - /* - * The net statistics after (re-)connect is not valid anymore, - * because may reflect other routing, etc. - */ - at_init(&imp->imp_at.iat_net_latency, 0, 0); - ptlrpc_at_adj_net_latency(request, - lustre_msg_get_service_time(request->rq_repmsg)); - - /* Import flags should be updated before waking import at FULL state */ - rc = ptlrpc_connect_set_flags(imp, ocd, old_connect_flags, exp, - aa->pcaa_initial_connect); - class_export_put(exp); - if (rc) - goto out; - - obd_import_event(imp->imp_obd, imp, IMP_EVENT_OCD); - - if (aa->pcaa_initial_connect) { - spin_lock(&imp->imp_lock); - if (msg_flags & MSG_CONNECT_REPLAYABLE) { - imp->imp_replayable = 1; - spin_unlock(&imp->imp_lock); - CDEBUG(D_HA, "connected to replayable target: %s\n", - obd2cli_tgt(imp->imp_obd)); - } else { - imp->imp_replayable = 0; - spin_unlock(&imp->imp_lock); - } - - /* 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); - } - - rc = 0; - goto finish; - } - - /* Determine what recovery state to move the import to. */ - if (msg_flags & MSG_CONNECT_RECONNECT) { - memset(&old_hdl, 0, sizeof(old_hdl)); - if (!memcmp(&old_hdl, lustre_msg_get_handle(request->rq_repmsg), - sizeof(old_hdl))) { - LCONSOLE_WARN("Reconnect to %s (at @%s) failed due bad handle %#llx\n", - obd2cli_tgt(imp->imp_obd), - imp->imp_connection->c_remote_uuid.uuid, - imp->imp_dlm_handle.cookie); - rc = -ENOTCONN; - goto out; - } - - if (memcmp(&imp->imp_remote_handle, - lustre_msg_get_handle(request->rq_repmsg), - sizeof(imp->imp_remote_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 - */ - if ((msg_flags & MSG_CONNECT_RECOVERING)) { - CDEBUG(level, "%s@%s changed server handle from %#llx to %#llx but is still in recovery\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); - } else { - LCONSOLE_WARN("Evicted from %s (at %s) after server handle changed from %#llx to %#llx\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); - } - - imp->imp_remote_handle = - *lustre_msg_get_handle(request->rq_repmsg); - - if (!(msg_flags & MSG_CONNECT_RECOVERING)) { - IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED); - rc = 0; - goto finish; - } - - } else { - 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) { - 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_flags & MSG_CONNECT_RECOVERING) { - CDEBUG(D_HA, "%s: reconnected to %s during replay\n", - imp->imp_obd->obd_name, - obd2cli_tgt(imp->imp_obd)); - - spin_lock(&imp->imp_lock); - imp->imp_resend_replay = 1; - spin_unlock(&imp->imp_lock); - - IMPORT_SET_STATE(imp, imp->imp_replay_state); - } else { - IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER); - } - } else if ((msg_flags & MSG_CONNECT_RECOVERING) && !imp->imp_invalid) { - LASSERT(imp->imp_replayable); - imp->imp_remote_handle = - *lustre_msg_get_handle(request->rq_repmsg); - imp->imp_last_replay_transno = 0; - imp->imp_replay_cursor = &imp->imp_committed_list; - IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY); - } else { - 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); - } - - /* Sanity checks for a reconnected import. */ - if (!(imp->imp_replayable) != !(msg_flags & MSG_CONNECT_REPLAYABLE)) - CERROR("imp_replayable flag does not match server after reconnect. We should LBUG right here.\n"); - - 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 %lld was previously committed, server now claims %lld)! 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: - ptlrpc_prepare_replay(imp); - rc = ptlrpc_import_recovery_state_machine(imp); - if (rc == -ENOTCONN) { - CDEBUG(D_HA, "evicted/aborted by %s@%s during recovery; invalidating and reconnecting\n", - obd2cli_tgt(imp->imp_obd), - imp->imp_connection->c_remote_uuid.uuid); - ptlrpc_connect_import(imp); - spin_lock(&imp->imp_lock); - imp->imp_connected = 0; - imp->imp_connect_tried = 1; - spin_unlock(&imp->imp_lock); - return 0; - } - -out: - spin_lock(&imp->imp_lock); - imp->imp_connected = 0; - imp->imp_connect_tried = 1; - spin_unlock(&imp->imp_lock); - - if (rc != 0) { - IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON); - if (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) - 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_all(&imp->imp_recovery_waitq); - return rc; -} - -/** - * interpret callback for "completed replay" RPCs. - * \see signal_completed_replay - */ -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 && - !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); - } 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); - } - - return 0; -} - -/** - * Let server know that we have no requests to replay anymore. - * Achieved by just sending a PING request - */ -static int signal_completed_replay(struct obd_import *imp) -{ - struct ptlrpc_request *req; - - if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_FINISH_REPLAY))) - return 0; - - LASSERT(atomic_read(&imp->imp_replay_inflight) == 0); - atomic_inc(&imp->imp_replay_inflight); - - req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION, - OBD_PING); - if (!req) { - atomic_dec(&imp->imp_replay_inflight); - return -ENOMEM; - } - - ptlrpc_request_set_replen(req); - req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT; - 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); - return 0; -} - -/** - * In kernel code all import invalidation happens in its own - * separate thread, so that whatever application happened to encounter - * a problem could still be killed or otherwise continue - */ -static int ptlrpc_invalidate_import_thread(void *data) -{ - struct obd_import *imp = data; - - unshare_fs_struct(); - - 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; -} - -/** - * This is the state machine for client-side recovery on import. - * - * Typically we have two possibly paths. If we came to server and it is not - * in recovery, we just enter IMP_EVICTED state, invalidate our import - * state and reconnect from scratch. - * If we came to server that is in recovery, we enter IMP_REPLAY import state. - * We go through our list of requests to replay and send them to server one by - * one. - * After sending all request from the list we change import state to - * IMP_REPLAY_LOCKS and re-request all the locks we believe we have from server - * and also all the locks we don't yet have and wait for server to grant us. - * After that we send a special "replay completed" request and change import - * state to IMP_REPLAY_WAIT. - * Upon receiving reply to that "replay completed" RPC we enter IMP_RECOVER - * state and resend all requests from sending list. - * After that we promote import to FULL state and send all delayed requests - * and import is fully operational after that. - * - */ -int ptlrpc_import_recovery_state_machine(struct obd_import *imp) -{ - int rc = 0; - int inflight; - char *target_start; - int target_len; - - 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, "%s: This client was evicted by %.*s; in progress operations using this service will fail.\n", - imp->imp_obd->obd_name, target_len, - target_start); - } - CDEBUG(D_HA, "evicted from %s@%s; invalidating\n", - obd2cli_tgt(imp->imp_obd), - imp->imp_connection->c_remote_uuid.uuid); - /* reset vbr_failed flag upon eviction */ - spin_lock(&imp->imp_lock); - imp->imp_vbr_failed = 0; - spin_unlock(&imp->imp_lock); - - { - struct task_struct *task; - /* bug 17802: XXX client_disconnect_export vs connect request - * race. if client is evicted at this time, we start - * invalidate thread without reference to import and import can - * be freed at same time. - */ - class_import_get(imp); - task = kthread_run(ptlrpc_invalidate_import_thread, imp, - "ll_imp_inval"); - if (IS_ERR(task)) { - class_import_put(imp); - CERROR("error starting invalidate thread: %d\n", rc); - rc = PTR_ERR(task); - } else { - rc = 0; - } - return rc; - } - } - - if (imp->imp_state == LUSTRE_IMP_REPLAY) { - CDEBUG(D_HA, "replay requested by %s\n", - obd2cli_tgt(imp->imp_obd)); - rc = ptlrpc_replay_next(imp, &inflight); - if (inflight == 0 && - atomic_read(&imp->imp_replay_inflight) == 0) { - IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS); - rc = ldlm_replay_locks(imp); - if (rc) - goto out; - } - rc = 0; - } - - if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) - if (atomic_read(&imp->imp_replay_inflight) == 0) { - IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT); - rc = signal_completed_replay(imp); - if (rc) - goto out; - } - - if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) - if (atomic_read(&imp->imp_replay_inflight) == 0) - IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER); - - if (imp->imp_state == LUSTRE_IMP_RECOVER) { - CDEBUG(D_HA, "reconnected to %s@%s\n", - obd2cli_tgt(imp->imp_obd), - imp->imp_connection->c_remote_uuid.uuid); - - rc = ptlrpc_resend(imp); - if (rc) - goto out; - 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 %.*s (at %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_all(&imp->imp_recovery_waitq); - ptlrpc_wake_delayed(imp); - } - -out: - return rc; -} - -int ptlrpc_disconnect_import(struct obd_import *imp, int noclose) -{ - struct ptlrpc_request *req; - int rq_opc, rc = 0; - - if (imp->imp_obd->obd_force) - goto set_state; - - switch (imp->imp_connect_op) { - case OST_CONNECT: - rq_opc = OST_DISCONNECT; - break; - case MDS_CONNECT: - rq_opc = MDS_DISCONNECT; - break; - case MGS_CONNECT: - rq_opc = MGS_DISCONNECT; - break; - default: - rc = -EINVAL; - CERROR("%s: don't know how to disconnect from %s (connect_op %d): rc = %d\n", - imp->imp_obd->obd_name, obd2cli_tgt(imp->imp_obd), - imp->imp_connect_op, rc); - return rc; - } - - if (ptlrpc_import_in_recovery(imp)) { - long timeout; - - if (AT_OFF) { - if (imp->imp_server_timeout) - timeout = obd_timeout * HZ / 2; - else - timeout = obd_timeout * HZ; - } else { - int idx = import_at_get_index(imp, - imp->imp_client->cli_request_portal); - timeout = at_get(&imp->imp_at.iat_service_estimate[idx]) * HZ; - } - - if (wait_event_idle_timeout(imp->imp_recovery_waitq, - !ptlrpc_import_in_recovery(imp), - cfs_timeout_cap(timeout)) == 0) - l_wait_event_abortable( - imp->imp_recovery_waitq, - !ptlrpc_import_in_recovery(imp)); - } - - spin_lock(&imp->imp_lock); - if (imp->imp_state != LUSTRE_IMP_FULL) - goto out; - 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; - - /* We want client umounts to happen quickly, no matter the - * server state... - */ - req->rq_timeout = min_t(int, req->rq_timeout, - INITIAL_CONNECT_TIMEOUT); - - 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); - } - -set_state: - spin_lock(&imp->imp_lock); -out: - 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(&imp->imp_lock); - - if (rc == -ETIMEDOUT || rc == -ENOTCONN || rc == -ESHUTDOWN) - rc = 0; - - return rc; -} -EXPORT_SYMBOL(ptlrpc_disconnect_import); - -/* Adaptive Timeout utils */ -extern unsigned int at_min, at_max, at_history; - -/* - *Update at_current with the specified value (bounded by at_min and at_max), - * as well as the AT history "bins". - * - Bin into timeslices using AT_BINS bins. - * - This gives us a max of the last at_history seconds 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; - time64_t now = ktime_get_real_seconds(); - long binlimit = max_t(long, 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, (long)(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; - - 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 = (u32)(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 debugfs 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; - - 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 */ - 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: - spin_unlock(&imp->imp_lock); - return i; -} |