/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (c) 2002, 2003 Cluster File Systems, Inc. * Author: Mike Shaver * * This file is part of the Lustre file system, http://www.lustre.org * Lustre is a trademark of Cluster File Systems, Inc. * * You may have signed or agreed to another license before downloading * this software. If so, you are bound by the terms and conditions * of that agreement, and the following does not apply to you. See the * LICENSE file included with this distribution for more information. * * If you did not agree to a different license, then this copy of Lustre * is open source software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * In either case, Lustre is distributed in the hope that it will be * useful, but WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * license text for more details. */ #define DEBUG_SUBSYSTEM S_RPC #ifndef __KERNEL__ # include #endif #include #include #include #include #include #include #include #include "ptlrpc_internal.h" struct ptlrpc_connect_async_args { __u64 pcaa_peer_committed; int pcaa_initial_connect; }; /* 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)); \ imp->imp_state = 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(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 service %.*s via nid " "%s was lost; in progress operations using this " "service will wait for recovery to complete.\n", imp->imp_obd->obd_name, target_len, target_start, libcfs_nid2str(imp->imp_connection->c_peer.nid)); } else { LCONSOLE_ERROR_MSG(0x166, "%s: Connection to service " "%.*s via nid %s was lost; in progress" "operations using this service will" "fail.\n", imp->imp_obd->obd_name, target_len, target_start, libcfs_nid2str(imp->imp_connection->c_peer.nid)); } ptlrpc_deactivate_timeouts(imp); IMPORT_SET_STATE_NOLOCK(imp, LUSTRE_IMP_DISCON); spin_unlock(&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) { ENTRY; spin_lock(&imp->imp_lock); if (imp->imp_invalid) { spin_unlock(&imp->imp_lock); EXIT; return; } CDEBUG(D_HA, "setting import %s INVALID\n", obd2cli_tgt(imp->imp_obd)); 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); EXIT; } /* * 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 l_wait_info lwi; int rc; atomic_inc(&imp->imp_inval_count); ptlrpc_deactivate_import(imp); LASSERT(imp->imp_invalid); /* wait for all requests to error out and call completion callbacks */ lwi = LWI_TIMEOUT_INTERVAL(cfs_timeout_cap(cfs_time_seconds(obd_timeout)), HZ, NULL, NULL); rc = l_wait_event(imp->imp_recovery_waitq, (atomic_read(&imp->imp_inflight) == 0), &lwi); if (rc) CDEBUG(D_HA, "%s: rc = %d waiting for callback (%d != 0)\n", obd2cli_tgt(imp->imp_obd), rc, atomic_read(&imp->imp_inflight)); obd_import_event(imp->imp_obd, imp, IMP_EVENT_INVALIDATE); sptlrpc_import_flush_all_ctx(imp); atomic_dec(&imp->imp_inval_count); cfs_waitq_signal(&imp->imp_recovery_waitq); } /* unset imp_invalid */ void ptlrpc_activate_import(struct obd_import *imp) { struct obd_device *obd = imp->imp_obd; spin_lock(&imp->imp_lock); imp->imp_invalid = 0; ptlrpc_activate_timeouts(imp); 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)); spin_lock(&imp->imp_lock); imp->imp_force_verify = 1; spin_unlock(&imp->imp_lock); ptlrpc_pinger_wake_up(); } EXIT; } static int import_select_connection(struct obd_import *imp) { struct obd_import_conn *imp_conn = NULL, *conn; struct obd_export *dlmexp; ENTRY; 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 "LPU64"\n", imp->imp_obd->obd_name, libcfs_nid2str(conn->oic_conn->c_peer.nid), conn->oic_last_attempt); /* Throttle the reconnect rate to once per RECONNECT_INTERVAL */ if (cfs_time_before_64(conn->oic_last_attempt + RECONNECT_INTERVAL * HZ, cfs_time_current_64())) { /* If we have never tried this connection since the the last successful attempt, go with this one */ if (cfs_time_beforeq_64(conn->oic_last_attempt, imp->imp_last_success_conn)) { imp_conn = conn; break; } /* Both of these 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) { LASSERT(imp->imp_conn_current); imp_conn = imp->imp_conn_current; } LASSERT(imp_conn->oic_conn); 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_put_connection(imp->imp_connection); imp->imp_connection = ptlrpc_connection_addref(imp_conn->oic_conn); dlmexp = class_conn2export(&imp->imp_dlm_handle); LASSERT(dlmexp != NULL); if (dlmexp->exp_connection) ptlrpc_put_connection(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) LCONSOLE_INFO("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)); spin_unlock(&imp->imp_lock); RETURN(0); } /* * must be called under imp_lock */ int ptlrpc_first_transno(struct obd_import *imp, __u64 *transno) { struct ptlrpc_request *req; struct list_head *tmp; if (list_empty(&imp->imp_replay_list)) return 0; tmp = imp->imp_replay_list.next; req = list_entry(tmp, struct ptlrpc_request, rq_replay_list); *transno = req->rq_transno; 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; int rc; __u64 committed_before_reconnect = 0; struct ptlrpc_request *request; int size[] = { sizeof(struct ptlrpc_body), sizeof(imp->imp_obd->u.cli.cl_target_uuid), sizeof(obd->obd_uuid), sizeof(imp->imp_dlm_handle), sizeof(imp->imp_connect_data) }; char *tmp[] = { 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; ENTRY; 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) { 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); 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, strlen(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)); spin_lock(&imp->imp_lock); imp->imp_last_recon = 1; spin_unlock(&imp->imp_lock); } } /* 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; rc = obd_reconnect(imp->imp_obd->obd_self_export, obd, &obd->obd_uuid, &imp->imp_connect_data); if (rc) GOTO(out, rc); request = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, imp->imp_connect_op, 5, size, tmp); if (!request) GOTO(out, rc = -ENOMEM); #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_send_state = LUSTRE_IMP_CONNECTING; /* Allow a slightly larger reply for future growth compatibility */ size[REPLY_REC_OFF] = sizeof(struct obd_connect_data) + 16 * sizeof(__u64); ptlrpc_req_set_repsize(request, 2, size); request->rq_interpret_reply = ptlrpc_connect_interpret; CLASSERT(sizeof (*aa) <= sizeof (request->rq_async_args)); aa = (struct ptlrpc_connect_async_args *)&request->rq_async_args; 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); /* On an initial connect, we don't know which one of a failover server pair is up. Don't wait long. */ #ifdef CRAY_XT3 request->rq_timeout = max((int)(obd_timeout / 2), 5); #else request->rq_timeout = max((int)(obd_timeout / 20), 5); #endif 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"); 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) { #ifdef __KERNEL__ struct obd_import_conn *imp_conn; #endif int wake_pinger = 0; ENTRY; spin_lock(&imp->imp_lock); if (list_empty(&imp->imp_conn_list)) GOTO(unlock, 0); #ifdef __KERNEL__ imp_conn = list_entry(imp->imp_conn_list.prev, struct obd_import_conn, oic_item); if (imp->imp_conn_current != imp_conn) { ptlrpc_ping_import_soon(imp); wake_pinger = 1; } #else /* liblustre has no pinger thead, so we wakup pinger anyway */ wake_pinger = 1; #endif unlock: spin_unlock(&imp->imp_lock); if (wake_pinger) ptlrpc_pinger_wake_up(); EXIT; } static int ptlrpc_connect_interpret(struct ptlrpc_request *request, void * data, int rc) { struct ptlrpc_connect_async_args *aa = data; struct obd_import *imp = request->rq_import; struct client_obd *cli = &imp->imp_obd->u.cli; struct lustre_handle old_hdl; int msg_flags; ENTRY; spin_lock(&imp->imp_lock); if (imp->imp_state == LUSTRE_IMP_CLOSED) { spin_unlock(&imp->imp_lock); RETURN(0); } spin_unlock(&imp->imp_lock); if (rc) GOTO(out, rc); LASSERT(imp->imp_conn_current); msg_flags = lustre_msg_get_op_flags(request->rq_repmsg); /* All imports are pingable */ spin_lock(&imp->imp_lock); imp->imp_pingable = 1; if (aa->pcaa_initial_connect) { 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 (msg_flags & MSG_CONNECT_NEXT_VER) { imp->imp_msg_magic = LUSTRE_MSG_MAGIC_V2; CDEBUG(D_RPCTRACE, "connect to %s with lustre_msg_v2\n", obd2cli_tgt(imp->imp_obd)); } else { CDEBUG(D_RPCTRACE, "connect to %s with lustre_msg_v1\n", obd2cli_tgt(imp->imp_obd)); } imp->imp_remote_handle = *lustre_msg_get_handle(request->rq_repmsg); IMPORT_SET_STATE(imp, LUSTRE_IMP_FULL); ptlrpc_activate_import(imp); GOTO(finish, rc = 0); } else { 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 = D_ERROR; /* Old MGC can reconnect to a restarted MGS */ if (strcmp(imp->imp_obd->obd_type->typ_name, LUSTRE_MGC_NAME) == 0) { level = D_CONFIG; } CDEBUG(level, "%s@%s changed handle from "LPX64" to "LPX64 "; copying, but this may foreshadow disaster\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); } 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) { 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)); spin_lock(&imp->imp_lock); imp->imp_resend_replay = 1; 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 { 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.clusterfs.com/" "long_list.cgi?buglist=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; ocd = lustre_swab_repbuf(request, REPLY_REC_OFF, sizeof(*ocd), lustre_swab_connect); 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; if (ocd == NULL) { 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); 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); } 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_BRW_SIZE) { cli->cl_max_pages_per_rpc = ocd->ocd_brw_size >> CFS_PAGE_SHIFT; } 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; 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); if (aa->pcaa_initial_connect && !imp->imp_initial_recov && (request->rq_import_generation == imp->imp_generation)) ptlrpc_deactivate_import(imp); 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 = lustre_swab_repbuf(request, REPLY_REC_OFF, sizeof *ocd, lustre_swab_connect); 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); } spin_lock(&imp->imp_lock); imp->imp_last_recon = 0; spin_unlock(&imp->imp_lock); cfs_waitq_signal(&imp->imp_recovery_waitq); RETURN(rc); } static int completed_replay_interpret(struct ptlrpc_request *req, void * data, int rc) { ENTRY; atomic_dec(&req->rq_import->imp_replay_inflight); if (req->rq_status == 0) { ptlrpc_import_recovery_state_machine(req->rq_import); } else { CDEBUG(D_HA, "%s: LAST_REPLAY message error: %d, " "reconnecting\n", req->rq_import->imp_obd->obd_name, req->rq_status); ptlrpc_connect_import(req->rq_import, NULL); } RETURN(0); } static int signal_completed_replay(struct obd_import *imp) { struct ptlrpc_request *req; ENTRY; LASSERT(atomic_read(&imp->imp_replay_inflight) == 0); atomic_inc(&imp->imp_replay_inflight); req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, OBD_PING, 1, NULL, NULL); if (!req) { atomic_dec(&imp->imp_replay_inflight); RETURN(-ENOMEM); } ptlrpc_req_set_repsize(req, 1, NULL); req->rq_send_state = LUSTRE_IMP_REPLAY_WAIT; lustre_msg_add_flags(req->rq_reqmsg, MSG_LOCK_REPLAY_DONE | MSG_REQ_REPLAY_DONE); req->rq_timeout *= 3; req->rq_interpret_reply = completed_replay_interpret; ptlrpcd_add_req(req); RETURN(0); } #ifdef __KERNEL__ static int ptlrpc_invalidate_import_thread(void *data) { struct obd_import *imp = data; ENTRY; ptlrpc_daemonize("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); 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__ rc = cfs_kernel_thread(ptlrpc_invalidate_import_thread, imp, CLONE_VM | CLONE_FILES); if (rc < 0) 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 && atomic_read(&imp->imp_replay_inflight) == 0) { IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_LOCKS); rc = ldlm_replay_locks(imp); if (rc) GOTO(out, rc); } rc = 0; } if (imp->imp_state == LUSTRE_IMP_REPLAY_LOCKS) { if (atomic_read(&imp->imp_replay_inflight) == 0) { IMPORT_SET_STATE(imp, LUSTRE_IMP_REPLAY_WAIT); rc = signal_completed_replay(imp); if (rc) GOTO(out, rc); } } if (imp->imp_state == LUSTRE_IMP_REPLAY_WAIT) { if (atomic_read(&imp->imp_replay_inflight) == 0) { IMPORT_SET_STATE(imp, LUSTRE_IMP_RECOVER); } } if (imp->imp_state == LUSTRE_IMP_RECOVER) { CDEBUG(D_HA, "reconnected to %s@%s\n", 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_signal(&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 (imp->imp_server_timeout) timeout = cfs_time_seconds(obd_timeout / 2); else timeout = cfs_time_seconds(obd_timeout); timeout = MAX(timeout * HZ, 1); lwi = LWI_TIMEOUT_INTR(cfs_timeout_cap(timeout), back_to_sleep, LWI_ON_SIGNAL_NOOP, NULL); rc = l_wait_event(imp->imp_recovery_waitq, !ptlrpc_import_in_recovery(imp), &lwi); } spin_lock(&imp->imp_lock); if (imp->imp_state != LUSTRE_IMP_FULL) GOTO(out, 0); spin_unlock(&imp->imp_lock); req = ptlrpc_prep_req(imp, LUSTRE_OBD_VERSION, rq_opc, 1, NULL, NULL); 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; #ifdef CRAY_XT3 req->rq_timeout = obd_timeout / 3; #else req->rq_timeout = 5; #endif IMPORT_SET_STATE(imp, LUSTRE_IMP_CONNECTING); req->rq_send_state = LUSTRE_IMP_CONNECTING; ptlrpc_req_set_repsize(req, 1, NULL); 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)); imp->imp_conn_cnt = 0; imp->imp_last_recon = 0; spin_unlock(&imp->imp_lock); RETURN(rc); }