/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * 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.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 #ifndef __KERNEL__ # include #endif #include #include #include #include #include #include #include #include #include "ptlrpc_internal.h" struct ptlrpc_connect_async_args { __u64 pcaa_peer_committed; 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, 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 { \ 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(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) { cfs_spin_lock(&imp->imp_lock); imp->imp_generation++; imp->imp_state = LUSTRE_IMP_NEW; 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, __u32 conn_cnt) { int rc = 0; cfs_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 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); 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 { 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; } /* Must be called with imp_lock held! */ static void ptlrpc_deactivate_and_unlock_import(struct obd_import *imp) { ENTRY; LASSERT_SPIN_LOCKED(&imp->imp_lock); CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd)); imp->imp_invalid = 1; imp->imp_generation++; 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; } /* * 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) { cfs_list_t *tmp, *n; struct ptlrpc_request *req; struct l_wait_info lwi; unsigned int timeout; int rc; 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); /* Wait forever until inflight == 0. We really can't do it another * way because in some cases we need to wait for very long reply * unlink. We can't do anything before that because there is really * no guarantee that some rdma transfer is not in progress right now. */ do { /* Calculate max timeout for waiting on rpcs to error * out. Use obd_timeout if calculated value is smaller * than it. */ if (!OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK)) { timeout = ptlrpc_inflight_timeout(imp); timeout += timeout / 3; if (timeout == 0) timeout = obd_timeout; } else { /* decrease the interval to increase race condition */ timeout = 1; } CDEBUG(D_RPCTRACE,"Sleeping %d sec for inflight to error out\n", timeout); /* Wait for all requests to error out and call completion * callbacks. Cap it at obd_timeout -- these should all * have been locally cancelled by ptlrpc_abort_inflight. */ lwi = LWI_TIMEOUT_INTERVAL( cfs_timeout_cap(cfs_time_seconds(timeout)), (timeout > 1)?cfs_time_seconds(1):cfs_time_seconds(1)/2, NULL, NULL); rc = l_wait_event(imp->imp_recovery_waitq, (cfs_atomic_read(&imp->imp_inflight) == 0), &lwi); if (rc) { const char *cli_tgt = obd2cli_tgt(imp->imp_obd); CERROR("%s: rc = %d waiting for callback (%d != 0)\n", cli_tgt, rc, cfs_atomic_read(&imp->imp_inflight)); cfs_spin_lock(&imp->imp_lock); if (cfs_atomic_read(&imp->imp_inflight) == 0) { int count = cfs_atomic_read(&imp->imp_unregistering); /* We know that "unregistering" rpcs only can * survive in sending or delaying lists (they * maybe waiting for long reply unlink in * sluggish nets). Let's check this. If there * is no inflight and unregistering != 0, this * is bug. */ LASSERTF(count == 0, "Some RPCs are still " "unregistering: %d\n", count); /* Let's save one loop as soon as inflight have * dropped to zero. No new inflights possible at * this point. */ rc = 0; } else { cfs_list_for_each_safe(tmp, n, &imp->imp_sending_list) { req = cfs_list_entry(tmp, struct ptlrpc_request, rq_list); DEBUG_REQ(D_ERROR, req, "still on sending list"); } cfs_list_for_each_safe(tmp, n, &imp->imp_delayed_list) { req = cfs_list_entry(tmp, struct ptlrpc_request, rq_list); DEBUG_REQ(D_ERROR, req, "still on delayed list"); } CERROR("%s: RPCs in \"%s\" phase found (%d). " "Network is sluggish? Waiting them " "to error out.\n", cli_tgt, ptlrpc_phase2str(RQ_PHASE_UNREGISTERING), cfs_atomic_read(&imp-> imp_unregistering)); } cfs_spin_unlock(&imp->imp_lock); } } while (rc != 0); /* * Let's additionally check that no new rpcs added to import in * "invalidate" state. */ LASSERT(cfs_atomic_read(&imp->imp_inflight) == 0); out: obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE); sptlrpc_import_flush_all_ctx(imp); cfs_atomic_dec(&imp->imp_inval_count); cfs_waitq_broadcast(&imp->imp_recovery_waitq); } /* unset imp_invalid */ void ptlrpc_activate_import(struct obd_import *imp) { struct obd_device *obd = imp->imp_obd; cfs_spin_lock(&imp->imp_lock); imp->imp_invalid = 0; 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, __u32 conn_cnt) { ENTRY; 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); } CDEBUG(D_HA, "%s: waking up pinger\n", obd2cli_tgt(imp->imp_obd)); cfs_spin_lock(&imp->imp_lock); imp->imp_force_verify = 1; cfs_spin_unlock(&imp->imp_lock); ptlrpc_pinger_wake_up(); } EXIT; } 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 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; ENTRY; cfs_spin_lock(&imp->imp_lock); if (imp->imp_state == LUSTRE_IMP_CLOSED) { 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) { cfs_spin_unlock(&imp->imp_lock); CERROR("already connected\n"); RETURN(0); } else if (imp->imp_state == LUSTRE_IMP_CONNECTING) { cfs_spin_unlock(&imp->imp_lock); CERROR("already connecting\n"); RETURN(-EALREADY); } IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_CONNECTING); imp->imp_conn_cnt++; imp->imp_resend_replay = 0; if (!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); cfs_spin_unlock(&imp->imp_lock); if (new_uuid) { struct obd_uuid uuid; obd_str2uuid(&uuid, new_uuid); rc = import_set_conn_priority(imp, &uuid); if (rc) GOTO(out, rc); } rc = import_select_connection(imp); if (rc) GOTO(out, rc); /* 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); } } rc = sptlrpc_import_sec_adapt(imp, NULL, 0); if (rc) GOTO(out, rc); /* Reset connect flags to the originally requested flags, in case * the server is updated on-the-fly we will get the new features. */ imp->imp_connect_data.ocd_connect_flags = imp->imp_connect_flags_orig; imp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT; rc = obd_reconnect(NULL, imp->imp_obd->obd_self_export, obd, &obd->obd_uuid, &imp->imp_connect_data, NULL); if (rc) GOTO(out, rc); request = ptlrpc_request_alloc(imp, &RQF_MDS_CONNECT); if (request == NULL) GOTO(out, rc = -ENOMEM); rc = ptlrpc_request_bufs_pack(request, LUSTRE_OBD_VERSION, imp->imp_connect_op, bufs, NULL); if (rc) { ptlrpc_request_free(request); GOTO(out, rc); } /* Report the rpc service time to the server so that it knows how long * to wait for clients to join recovery */ lustre_msg_set_service_time(request->rq_reqmsg, at_timeout2est(request->rq_timeout)); /* The amount of time we give the server to process the connect req. * import_select_connection will increase the net latency on * repeated reconnect attempts to cover slow networks. * We override/ignore the server rpc completion estimate here, * which may be large if this is a reconnect attempt */ request->rq_timeout = INITIAL_CONNECT_TIMEOUT; lustre_msg_set_timeout(request->rq_reqmsg, request->rq_timeout); #ifndef __KERNEL__ lustre_msg_add_op_flags(request->rq_reqmsg, MSG_CONNECT_LIBCLIENT); #endif 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; /* 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; 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) { 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); 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) { 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) { #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; __u64 old_connect_flags; int msg_flags; ENTRY; cfs_spin_lock(&imp->imp_lock); if (imp->imp_state == LUSTRE_IMP_CLOSED) { cfs_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); 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", obd2cli_tgt(imp->imp_obd)); } else { imp->imp_replayable = 0; cfs_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); } 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, lustre_msg_get_handle(request->rq_repmsg), sizeof (old_hdl))) { CERROR("%s@%s didn't like our handle "LPX64 ", 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, 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 */ CDEBUG(level,"%s@%s changed server handle from " LPX64" to "LPX64"%s\n", obd2cli_tgt(imp->imp_obd), imp->imp_connection->c_remote_uuid.uuid, imp->imp_remote_handle.cookie, lustre_msg_get_handle(request->rq_repmsg)-> cookie, (MSG_CONNECT_RECOVERING & msg_flags) ? " but is still in recovery" : ""); imp->imp_remote_handle = *lustre_msg_get_handle(request->rq_repmsg); if (!(MSG_CONNECT_RECOVERING & msg_flags)) { IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED); GOTO(finish, rc = 0); } } else { CDEBUG(D_HA, "reconnected to %s@%s after partition\n", obd2cli_tgt(imp->imp_obd), imp->imp_connection->c_remote_uuid.uuid); } if (imp->imp_invalid) { CDEBUG(D_HA, "%s: reconnected but import is invalid; " "marking evicted\n", imp->imp_obd->obd_name); IMPORT_SET_STATE(imp, LUSTRE_IMP_EVICTED); } else if (MSG_CONNECT_RECOVERING & msg_flags) { CDEBUG(D_HA, "%s: reconnected to %s during replay\n", imp->imp_obd->obd_name, 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 = *lustre_msg_get_handle(request->rq_repmsg); imp->imp_last_replay_transno = 0; 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) < aa->pcaa_peer_committed) { CERROR("%s went back in time (transno "LPD64 " was previously committed, server now claims "LPD64 ")! 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: rc = ptlrpc_import_recovery_state_machine(imp); if (rc != 0) { 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, 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: if (rc != 0) { IMPORT_SET_STATE(imp, LUSTRE_IMP_DISCON); cfs_spin_lock(&imp->imp_lock); if (aa->pcaa_initial_connect && !imp->imp_initial_recov && (request->rq_import_generation == imp->imp_generation)) ptlrpc_deactivate_and_unlock_import(imp); else cfs_spin_unlock(&imp->imp_lock); if ((imp->imp_recon_bk && imp->imp_last_recon) || (rc == -EACCES)) { /* * Give up trying to reconnect * EACCES means client has no permission for connection */ imp->imp_obd->obd_no_recov = 1; ptlrpc_deactivate_import(imp); } if (rc == -EPROTO) { struct obd_connect_data *ocd; /* reply message might not be ready */ if (request->rq_repmsg == NULL) RETURN(-EPROTO); ocd = req_capsule_server_get(&request->rq_pill, &RMF_CONNECT_DATA); if (ocd && (ocd->ocd_connect_flags & OBD_CONNECT_VERSION) && (ocd->ocd_version != LUSTRE_VERSION_CODE)) { /* Actually servers are only supposed to refuse connection from liblustre clients, so we should never see this from VFS context */ LCONSOLE_ERROR_MSG(0x16a, "Server %s version " "(%d.%d.%d.%d)" " refused connection from this client " "with an incompatible version (%s). " "Client must be recompiled\n", obd2cli_tgt(imp->imp_obd), OBD_OCD_VERSION_MAJOR(ocd->ocd_version), OBD_OCD_VERSION_MINOR(ocd->ocd_version), OBD_OCD_VERSION_PATCH(ocd->ocd_version), OBD_OCD_VERSION_FIX(ocd->ocd_version), LUSTRE_VERSION_STRING); ptlrpc_deactivate_import(imp); IMPORT_SET_STATE(imp, LUSTRE_IMP_CLOSED); } RETURN(-EPROTO); } ptlrpc_maybe_ping_import_soon(imp); CDEBUG(D_HA, "recovery of %s on %s failed (%d)\n", obd2cli_tgt(imp->imp_obd), (char *)imp->imp_connection->c_remote_uuid.uuid, rc); } 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(const struct lu_env *env, struct ptlrpc_request *req, void * data, int rc) { 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(cfs_atomic_read(&imp->imp_replay_inflight) == 0); cfs_atomic_inc(&imp->imp_replay_inflight); req = ptlrpc_request_alloc_pack(imp, &RQF_OBD_PING, LUSTRE_OBD_VERSION, OBD_PING); if (req == NULL) { cfs_atomic_dec(&imp->imp_replay_inflight); RETURN(-ENOMEM); } 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, 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", obd2cli_tgt(imp->imp_obd), imp->imp_connection->c_remote_uuid.uuid); #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", obd2cli_tgt(imp->imp_obd)); rc = ptlrpc_replay_next(imp, &inflight); if (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) GOTO(out, rc); } rc = 0; } if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) { if (cfs_atomic_read(&imp->imp_replay_inflight) == 0) { IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT); rc = signal_completed_replay(imp); if (rc) GOTO(out, rc); } } if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) { if (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", obd2cli_tgt(imp->imp_obd), imp->imp_connection->c_remote_uuid.uuid); rc = ptlrpc_resend(imp); if (rc) 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) { cfs_waitq_broadcast(&imp->imp_recovery_waitq); ptlrpc_wake_delayed(imp); } out: RETURN(rc); } static int back_to_sleep(void *unused) { return 0; } int ptlrpc_disconnect_import(struct obd_import *imp, int noclose) { 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 MGS_CONNECT: rq_opc = MGS_DISCONNECT; break; default: CERROR("don't know how to disconnect from %s (connect_op %d)\n", obd2cli_tgt(imp->imp_obd), imp->imp_connect_op); RETURN(-EINVAL); } if (ptlrpc_import_in_recovery(imp)) { struct l_wait_info lwi; 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); } cfs_spin_lock(&imp->imp_lock); if (imp->imp_state != LUSTRE_IMP_FULL) GOTO(out, 0); 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); } set_state: cfs_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)); /* 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; }