/* -*- 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 (c) 2003, 2010, Oracle and/or its affiliates. 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. */ #ifndef EXPORT_SYMTAB # define EXPORT_SYMTAB #endif #define DEBUG_SUBSYSTEM S_LDLM #ifdef __KERNEL__ # include #else # include #endif #include #include #include #include #include "ldlm_internal.h" /* @priority: if non-zero, move the selected to the list head * @create: if zero, only search in existed connections */ static int import_set_conn(struct obd_import *imp, struct obd_uuid *uuid, int priority, int create) { struct ptlrpc_connection *ptlrpc_conn; struct obd_import_conn *imp_conn = NULL, *item; int rc = 0; ENTRY; if (!create && !priority) { CDEBUG(D_HA, "Nothing to do\n"); RETURN(-EINVAL); } ptlrpc_conn = ptlrpc_uuid_to_connection(uuid); if (!ptlrpc_conn) { CDEBUG(D_HA, "can't find connection %s\n", uuid->uuid); RETURN (-ENOENT); } if (create) { OBD_ALLOC(imp_conn, sizeof(*imp_conn)); if (!imp_conn) { GOTO(out_put, rc = -ENOMEM); } } spin_lock(&imp->imp_lock); list_for_each_entry(item, &imp->imp_conn_list, oic_item) { if (obd_uuid_equals(uuid, &item->oic_uuid)) { if (priority) { list_del(&item->oic_item); list_add(&item->oic_item, &imp->imp_conn_list); item->oic_last_attempt = 0; } CDEBUG(D_HA, "imp %p@%s: found existing conn %s%s\n", imp, imp->imp_obd->obd_name, uuid->uuid, (priority ? ", moved to head" : "")); spin_unlock(&imp->imp_lock); GOTO(out_free, rc = 0); } } /* not found */ if (create) { imp_conn->oic_conn = ptlrpc_conn; imp_conn->oic_uuid = *uuid; imp_conn->oic_last_attempt = 0; if (priority) list_add(&imp_conn->oic_item, &imp->imp_conn_list); else list_add_tail(&imp_conn->oic_item, &imp->imp_conn_list); CDEBUG(D_HA, "imp %p@%s: add connection %s at %s\n", imp, imp->imp_obd->obd_name, uuid->uuid, (priority ? "head" : "tail")); } else { spin_unlock(&imp->imp_lock); GOTO(out_free, rc = -ENOENT); } spin_unlock(&imp->imp_lock); RETURN(0); out_free: if (imp_conn) OBD_FREE(imp_conn, sizeof(*imp_conn)); out_put: ptlrpc_connection_put(ptlrpc_conn); RETURN(rc); } int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid) { return import_set_conn(imp, uuid, 1, 0); } int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid, int priority) { return import_set_conn(imp, uuid, priority, 1); } int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid) { struct obd_import_conn *imp_conn; struct obd_export *dlmexp; int rc = -ENOENT; ENTRY; spin_lock(&imp->imp_lock); if (list_empty(&imp->imp_conn_list)) { LASSERT(!imp->imp_connection); GOTO(out, rc); } list_for_each_entry(imp_conn, &imp->imp_conn_list, oic_item) { if (!obd_uuid_equals(uuid, &imp_conn->oic_uuid)) continue; LASSERT(imp_conn->oic_conn); /* is current conn? */ if (imp_conn == imp->imp_conn_current) { LASSERT(imp_conn->oic_conn == imp->imp_connection); if (imp->imp_state != LUSTRE_IMP_CLOSED && imp->imp_state != LUSTRE_IMP_DISCON) { CERROR("can't remove current connection\n"); GOTO(out, rc = -EBUSY); } ptlrpc_connection_put(imp->imp_connection); imp->imp_connection = NULL; dlmexp = class_conn2export(&imp->imp_dlm_handle); if (dlmexp && dlmexp->exp_connection) { LASSERT(dlmexp->exp_connection == imp_conn->oic_conn); ptlrpc_connection_put(dlmexp->exp_connection); dlmexp->exp_connection = NULL; } } list_del(&imp_conn->oic_item); ptlrpc_connection_put(imp_conn->oic_conn); OBD_FREE(imp_conn, sizeof(*imp_conn)); CDEBUG(D_HA, "imp %p@%s: remove connection %s\n", imp, imp->imp_obd->obd_name, uuid->uuid); rc = 0; break; } out: spin_unlock(&imp->imp_lock); if (rc == -ENOENT) CERROR("connection %s not found\n", uuid->uuid); RETURN(rc); } /* configure an RPC client OBD device * * lcfg parameters: * 1 - client UUID * 2 - server UUID * 3 - inactive-on-startup */ int client_obd_setup(struct obd_device *obddev, obd_count len, void *buf) { struct lustre_cfg* lcfg = buf; struct client_obd *cli = &obddev->u.cli; struct obd_import *imp; struct obd_uuid server_uuid; int rq_portal, rp_portal, connect_op; char *name = obddev->obd_type->typ_name; int rc; ENTRY; /* In a more perfect world, we would hang a ptlrpc_client off of * obd_type and just use the values from there. */ if (!strcmp(name, LUSTRE_OSC_NAME)) { rq_portal = OST_REQUEST_PORTAL; rp_portal = OSC_REPLY_PORTAL; connect_op = OST_CONNECT; } else if (!strcmp(name, LUSTRE_MDC_NAME)) { rq_portal = MDS_REQUEST_PORTAL; rp_portal = MDC_REPLY_PORTAL; connect_op = MDS_CONNECT; } else if (!strcmp(name, LUSTRE_MGC_NAME)) { rq_portal = MGS_REQUEST_PORTAL; rp_portal = MGC_REPLY_PORTAL; connect_op = MGS_CONNECT; } else { CERROR("unknown client OBD type \"%s\", can't setup\n", name); RETURN(-EINVAL); } if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) { CERROR("requires a TARGET UUID\n"); RETURN(-EINVAL); } if (LUSTRE_CFG_BUFLEN(lcfg, 1) > 37) { CERROR("client UUID must be less than 38 characters\n"); RETURN(-EINVAL); } if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) { CERROR("setup requires a SERVER UUID\n"); RETURN(-EINVAL); } if (LUSTRE_CFG_BUFLEN(lcfg, 2) > 37) { CERROR("target UUID must be less than 38 characters\n"); RETURN(-EINVAL); } init_rwsem(&cli->cl_sem); sema_init(&cli->cl_mgc_sem, 1); cli->cl_conn_count = 0; memcpy(server_uuid.uuid, lustre_cfg_buf(lcfg, 2), min_t(unsigned int, LUSTRE_CFG_BUFLEN(lcfg, 2), sizeof(server_uuid))); cli->cl_dirty = 0; cli->cl_avail_grant = 0; /* FIXME: should limit this for the sum of all cl_dirty_max */ cli->cl_dirty_max = OSC_MAX_DIRTY_DEFAULT * 1024 * 1024; if (cli->cl_dirty_max >> CFS_PAGE_SHIFT > num_physpages / 8) cli->cl_dirty_max = num_physpages << (CFS_PAGE_SHIFT - 3); CFS_INIT_LIST_HEAD(&cli->cl_cache_waiters); CFS_INIT_LIST_HEAD(&cli->cl_loi_ready_list); CFS_INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list); CFS_INIT_LIST_HEAD(&cli->cl_loi_write_list); CFS_INIT_LIST_HEAD(&cli->cl_loi_read_list); client_obd_list_lock_init(&cli->cl_loi_list_lock); cli->cl_r_in_flight = 0; cli->cl_w_in_flight = 0; cli->cl_dio_r_in_flight = 0; cli->cl_dio_w_in_flight = 0; spin_lock_init(&cli->cl_read_rpc_hist.oh_lock); spin_lock_init(&cli->cl_write_rpc_hist.oh_lock); spin_lock_init(&cli->cl_read_page_hist.oh_lock); spin_lock_init(&cli->cl_write_page_hist.oh_lock); spin_lock_init(&cli->cl_read_offset_hist.oh_lock); spin_lock_init(&cli->cl_write_offset_hist.oh_lock); cfs_waitq_init(&cli->cl_destroy_waitq); atomic_set(&cli->cl_destroy_in_flight, 0); #ifdef ENABLE_CHECKSUM /* Turn on checksumming by default. */ cli->cl_checksum = 1; /* * The supported checksum types will be worked out at connect time * Set cl_chksum* to CRC32 for now to avoid returning screwed info * through procfs. */ cli->cl_cksum_type = cli->cl_supp_cksum_types = OBD_CKSUM_CRC32; #endif atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS); /* This value may be changed at connect time in ptlrpc_connect_interpret. */ cli->cl_max_pages_per_rpc = min((int)PTLRPC_MAX_BRW_PAGES, (int)(1024 * 1024 >> CFS_PAGE_SHIFT)); if (!strcmp(name, LUSTRE_MDC_NAME)) { cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT; } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 128 /* MB */) { cli->cl_max_rpcs_in_flight = 2; } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 256 /* MB */) { cli->cl_max_rpcs_in_flight = 3; } else if (num_physpages >> (20 - CFS_PAGE_SHIFT) <= 512 /* MB */) { cli->cl_max_rpcs_in_flight = 4; } else { cli->cl_max_rpcs_in_flight = OSC_MAX_RIF_DEFAULT; } rc = ldlm_get_ref(); if (rc) { CERROR("ldlm_get_ref failed: %d\n", rc); GOTO(err, rc); } ptlrpc_init_client(rq_portal, rp_portal, name, &obddev->obd_ldlm_client); imp = class_new_import(obddev); if (imp == NULL) GOTO(err_ldlm, rc = -ENOENT); imp->imp_client = &obddev->obd_ldlm_client; imp->imp_connect_op = connect_op; imp->imp_initial_recov = 1; imp->imp_initial_recov_bk = 0; CFS_INIT_LIST_HEAD(&imp->imp_pinger_chain); memcpy(cli->cl_target_uuid.uuid, lustre_cfg_buf(lcfg, 1), LUSTRE_CFG_BUFLEN(lcfg, 1)); class_import_put(imp); rc = client_import_add_conn(imp, &server_uuid, 1); if (rc) { CERROR("can't add initial connection\n"); GOTO(err_import, rc); } cli->cl_import = imp; /* cli->cl_max_mds_{easize,cookiesize} updated by mdc_init_ea_size() */ cli->cl_max_mds_easize = sizeof(struct lov_mds_md_v3); cli->cl_max_mds_cookiesize = sizeof(struct llog_cookie); if (LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) { if (!strcmp(lustre_cfg_string(lcfg, 3), "inactive")) { CDEBUG(D_HA, "marking %s %s->%s as inactive\n", name, obddev->obd_name, cli->cl_target_uuid.uuid); spin_lock(&imp->imp_lock); imp->imp_deactive = 1; spin_unlock(&imp->imp_lock); } } obddev->obd_namespace = ldlm_namespace_new(obddev, obddev->obd_name, LDLM_NAMESPACE_CLIENT, LDLM_NAMESPACE_GREEDY); if (obddev->obd_namespace == NULL) { CERROR("Unable to create client namespace - %s\n", obddev->obd_name); GOTO(err_import, rc = -ENOMEM); } cli->cl_qchk_stat = CL_NOT_QUOTACHECKED; RETURN(rc); err_import: class_destroy_import(imp); err_ldlm: ldlm_put_ref(); err: RETURN(rc); } int client_obd_cleanup(struct obd_device *obddev) { ENTRY; ldlm_namespace_free_post(obddev->obd_namespace); obddev->obd_namespace = NULL; ldlm_put_ref(); RETURN(0); } /* ->o_connect() method for client side (OSC and MDC and MGC) */ int client_connect_import(struct lustre_handle *dlm_handle, struct obd_device *obd, struct obd_uuid *cluuid, struct obd_connect_data *data, void *localdata) { struct client_obd *cli = &obd->u.cli; struct obd_import *imp = cli->cl_import; struct obd_export **exp = localdata; struct obd_connect_data *ocd; int rc; ENTRY; down_write(&cli->cl_sem); CDEBUG(D_INFO, "connect %s - %d\n", obd->obd_name, cli->cl_conn_count); if (cli->cl_conn_count > 0) GOTO(out_sem, rc = -EALREADY); rc = class_connect(dlm_handle, obd, cluuid); if (rc) GOTO(out_sem, rc); cli->cl_conn_count++; *exp = class_conn2export(dlm_handle); LASSERT(obd->obd_namespace); imp->imp_dlm_handle = *dlm_handle; rc = ptlrpc_init_import(imp); if (rc != 0) GOTO(out_ldlm, rc); ocd = &imp->imp_connect_data; if (data) { *ocd = *data; imp->imp_connect_flags_orig = data->ocd_connect_flags; } rc = ptlrpc_connect_import(imp, NULL); if (rc != 0) { LASSERT (imp->imp_state == LUSTRE_IMP_DISCON); GOTO(out_ldlm, rc); } LASSERT((*exp)->exp_connection); if (data) { LASSERT((ocd->ocd_connect_flags & data->ocd_connect_flags) == ocd->ocd_connect_flags); data->ocd_connect_flags = ocd->ocd_connect_flags; } ptlrpc_pinger_add_import(imp); EXIT; if (rc) { out_ldlm: cli->cl_conn_count--; class_disconnect(*exp); *exp = NULL; } out_sem: up_write(&cli->cl_sem); return rc; } int client_disconnect_export(struct obd_export *exp) { struct obd_device *obd = class_exp2obd(exp); struct client_obd *cli; struct obd_import *imp; int rc = 0, err; ENTRY; if (!obd) { CERROR("invalid export for disconnect: exp %p cookie "LPX64"\n", exp, exp ? exp->exp_handle.h_cookie : -1); RETURN(-EINVAL); } cli = &obd->u.cli; imp = cli->cl_import; down_write(&cli->cl_sem); CDEBUG(D_INFO, "disconnect %s - %d\n", obd->obd_name, cli->cl_conn_count); if (!cli->cl_conn_count) { CERROR("disconnecting disconnected device (%s)\n", obd->obd_name); GOTO(out_disconnect, rc = -EINVAL); } cli->cl_conn_count--; if (cli->cl_conn_count) GOTO(out_disconnect, rc = 0); /* Mark import deactivated now, so we don't try to reconnect if any * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't * fully deactivate the import, or that would drop all requests. */ spin_lock(&imp->imp_lock); imp->imp_deactive = 1; spin_unlock(&imp->imp_lock); /* Some non-replayable imports (MDS's OSCs) are pinged, so just * delete it regardless. (It's safe to delete an import that was * never added.) */ (void)ptlrpc_pinger_del_import(imp); if (obd->obd_namespace != NULL) { /* obd_force == local only */ ldlm_cli_cancel_unused(obd->obd_namespace, NULL, obd->obd_force ? LDLM_FL_LOCAL_ONLY:0, NULL); ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force); } rc = ptlrpc_disconnect_import(imp, 0); ptlrpc_invalidate_import(imp); if (imp->imp_rq_pool) { ptlrpc_free_rq_pool(imp->imp_rq_pool); imp->imp_rq_pool = NULL; } class_destroy_import(imp); cli->cl_import = NULL; EXIT; out_disconnect: /* use server style - class_disconnect should be always called for * o_disconnect */ err = class_disconnect(exp); if (!rc && err) rc = err; up_write(&cli->cl_sem); RETURN(rc); } int server_disconnect_export(struct obd_export *exp) { int rc; ENTRY; /* Disconnect early so that clients can't keep using export */ rc = class_disconnect(exp); /* close import for avoid sending any requests */ if (exp->exp_imp_reverse) ptlrpc_cleanup_imp(exp->exp_imp_reverse); if (exp->exp_obd->obd_namespace != NULL) ldlm_cancel_locks_for_export(exp); /* complete all outstanding replies */ spin_lock(&exp->exp_lock); while (!list_empty(&exp->exp_outstanding_replies)) { struct ptlrpc_reply_state *rs = list_entry(exp->exp_outstanding_replies.next, struct ptlrpc_reply_state, rs_exp_list); struct ptlrpc_service *svc = rs->rs_service; spin_lock(&svc->srv_lock); list_del_init(&rs->rs_exp_list); ptlrpc_schedule_difficult_reply(rs); spin_unlock(&svc->srv_lock); } spin_unlock(&exp->exp_lock); RETURN(rc); } /* -------------------------------------------------------------------------- * from old lib/target.c * -------------------------------------------------------------------------- */ static int target_handle_reconnect(struct lustre_handle *conn, struct obd_export *exp, struct obd_uuid *cluuid) { ENTRY; if (exp->exp_connection && exp->exp_imp_reverse) { struct lustre_handle *hdl; hdl = &exp->exp_imp_reverse->imp_remote_handle; /* Might be a re-connect after a partition. */ if (!memcmp(&conn->cookie, &hdl->cookie, sizeof conn->cookie)) { CWARN("%s: %s reconnecting\n", exp->exp_obd->obd_name, cluuid->uuid); conn->cookie = exp->exp_handle.h_cookie; /* target_handle_connect() treats EALREADY and * -EALREADY differently. EALREADY means we are * doing a valid reconnect from the same client. */ RETURN(EALREADY); } else { CERROR("%s reconnecting from %s, " "handle mismatch (ours "LPX64", theirs " LPX64")\n", cluuid->uuid, exp->exp_connection->c_remote_uuid.uuid, hdl->cookie, conn->cookie); memset(conn, 0, sizeof *conn); /* target_handle_connect() treats EALREADY and * -EALREADY differently. -EALREADY is an error * (same UUID, different handle). */ RETURN(-EALREADY); } } conn->cookie = exp->exp_handle.h_cookie; CDEBUG(D_HA, "connect export for UUID '%s' at %p, cookie "LPX64"\n", cluuid->uuid, exp, conn->cookie); RETURN(0); } void target_client_add_cb(struct obd_device *obd, __u64 transno, void *cb_data, int error) { struct obd_export *exp = cb_data; CDEBUG(D_RPCTRACE, "%s: committing for initial connect of %s\n", obd->obd_name, exp->exp_client_uuid.uuid); spin_lock(&exp->exp_lock); exp->exp_need_sync = 0; spin_unlock(&exp->exp_lock); } EXPORT_SYMBOL(target_client_add_cb); static void target_start_and_reset_recovery_timer(struct obd_device *obd, svc_handler_t handler, struct ptlrpc_request *req, int new_client); void target_stop_recovery(void *, int); static void reset_recovery_timer(struct obd_device *obd, int duration, int extend); int target_recovery_check_and_stop(struct obd_device *obd) { int abort_recovery = 0; if (obd->obd_stopping || !obd->obd_recovering) return 1; spin_lock_bh(&obd->obd_processing_task_lock); abort_recovery = obd->obd_abort_recovery; obd->obd_abort_recovery = 0; spin_unlock_bh(&obd->obd_processing_task_lock); if (!abort_recovery) return 0; /** check if fs version-capable */ if (target_fs_version_capable(obd)) { class_handle_stale_exports(obd); } else { CWARN("Versions are not supported by ldiskfs, VBR is OFF\n"); class_disconnect_stale_exports(obd, exp_flags_from_obd(obd)); } /* VBR: no clients are remained to replay, stop recovery */ spin_lock_bh(&obd->obd_processing_task_lock); if (obd->obd_recovering && obd->obd_recoverable_clients == 0) { spin_unlock_bh(&obd->obd_processing_task_lock); target_stop_recovery(obd, 0); return 1; } /* always check versions now */ obd->obd_version_recov = 1; cfs_waitq_signal(&obd->obd_next_transno_waitq); spin_unlock_bh(&obd->obd_processing_task_lock); /* reset timer, recovery will proceed with versions now */ reset_recovery_timer(obd, OBD_RECOVERY_TIME_SOFT, 1); return 0; } EXPORT_SYMBOL(target_recovery_check_and_stop); int target_handle_connect(struct ptlrpc_request *req, svc_handler_t handler) { struct obd_device *target, *targref = NULL; struct obd_export *export = NULL; struct obd_import *revimp; struct lustre_handle conn; struct obd_uuid tgtuuid; struct obd_uuid cluuid; struct obd_uuid remote_uuid; char *str, *tmp; int rc = 0; struct obd_connect_data *data; __u32 size[2] = { sizeof(struct ptlrpc_body), sizeof(*data) }; lnet_nid_t *client_nid = NULL; int mds_conn = 0; ENTRY; OBD_RACE(OBD_FAIL_TGT_CONN_RACE); lustre_set_req_swabbed(req, REQ_REC_OFF); str = lustre_msg_string(req->rq_reqmsg, REQ_REC_OFF, sizeof(tgtuuid)-1); if (str == NULL) { DEBUG_REQ(D_ERROR, req, "bad target UUID for connect"); GOTO(out, rc = -EINVAL); } obd_str2uuid (&tgtuuid, str); target = class_uuid2obd(&tgtuuid); /* COMPAT_146 */ /* old (pre 1.6) lustre_process_log tries to connect to mdsname (eg. mdsA) instead of uuid. */ if (!target) { snprintf((char *)tgtuuid.uuid, sizeof(tgtuuid), "%s_UUID", str); target = class_uuid2obd(&tgtuuid); } if (!target) target = class_name2obd(str); /* end COMPAT_146 */ if (!target || target->obd_stopping || !target->obd_set_up) { LCONSOLE_ERROR_MSG(0x137, "UUID '%s' is not available " " for connect (%s)\n", str, !target ? "no target" : (target->obd_stopping ? "stopping" : "not set up")); GOTO(out, rc = -ENODEV); } if (target->obd_no_conn) { LCONSOLE_WARN("%s: temporarily refusing client connection " "from %s\n", target->obd_name, libcfs_nid2str(req->rq_peer.nid)); GOTO(out, rc = -EAGAIN); } /* Make sure the target isn't cleaned up while we're here. Yes, there's still a race between the above check and our incref here. Really, class_uuid2obd should take the ref. */ targref = class_incref(target); lustre_set_req_swabbed(req, REQ_REC_OFF + 1); str = lustre_msg_string(req->rq_reqmsg, REQ_REC_OFF + 1, sizeof(cluuid) - 1); if (str == NULL) { DEBUG_REQ(D_ERROR, req, "bad client UUID for connect"); GOTO(out, rc = -EINVAL); } obd_str2uuid (&cluuid, str); /* XXX extract a nettype and format accordingly */ switch (sizeof(lnet_nid_t)) { /* NB the casts only avoid compiler warnings */ case 8: snprintf(remote_uuid.uuid, sizeof remote_uuid, "NET_"LPX64"_UUID", (__u64)req->rq_peer.nid); break; case 4: snprintf(remote_uuid.uuid, sizeof remote_uuid, "NET_%x_UUID", (__u32)req->rq_peer.nid); break; default: LBUG(); } target_recovery_check_and_stop(target); tmp = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2, sizeof conn); if (tmp == NULL) GOTO(out, rc = -EPROTO); memcpy(&conn, tmp, sizeof conn); data = lustre_swab_reqbuf(req, REQ_REC_OFF + 3, sizeof(*data), lustre_swab_connect); rc = lustre_pack_reply(req, 2, size, NULL); if (rc) GOTO(out, rc); if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) { if (!data) { DEBUG_REQ(D_WARNING, req, "Refusing old (unversioned) " "libclient connection attempt"); GOTO(out, rc = -EPROTO); } else if (data->ocd_version < LUSTRE_VERSION_CODE - LUSTRE_VERSION_ALLOWED_OFFSET || data->ocd_version > LUSTRE_VERSION_CODE + LUSTRE_VERSION_ALLOWED_OFFSET) { DEBUG_REQ(D_WARNING, req, "Refusing %s (%d.%d.%d.%d) " "libclient connection attempt", data->ocd_version < LUSTRE_VERSION_CODE ? "old" : "new", OBD_OCD_VERSION_MAJOR(data->ocd_version), OBD_OCD_VERSION_MINOR(data->ocd_version), OBD_OCD_VERSION_PATCH(data->ocd_version), OBD_OCD_VERSION_FIX(data->ocd_version)); data = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, offsetof(typeof(*data), ocd_version) + sizeof(data->ocd_version)); if (data) { data->ocd_connect_flags = OBD_CONNECT_VERSION; data->ocd_version = LUSTRE_VERSION_CODE; } GOTO(out, rc = -EPROTO); } } if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL) && (data->ocd_connect_flags & OBD_CONNECT_MDS)) mds_conn = 1; /* lctl gets a backstage, all-access pass. */ if (obd_uuid_equals(&cluuid, &target->obd_uuid)) goto dont_check_exports; export = lustre_hash_lookup(target->obd_uuid_hash, &cluuid); if (!export) goto no_export; /* we've found an export in the hash */ if (export->exp_connecting) { /* bug 9635, et. al. */ CWARN("%s: exp %p already connecting\n", export->exp_obd->obd_name, export); class_export_put(export); export = NULL; rc = -EALREADY; } else if (mds_conn && export->exp_connection) { if (req->rq_peer.nid != export->exp_connection->c_peer.nid) /* mds reconnected after failover */ CWARN("%s: received MDS connection from NID %s," " removing former export from NID %s\n", target->obd_name, libcfs_nid2str(req->rq_peer.nid), libcfs_nid2str(export->exp_connection->c_peer.nid)); else /* new mds connection from the same nid */ CWARN("%s: received new MDS connection from NID %s," " removing former export from same NID\n", target->obd_name, libcfs_nid2str(req->rq_peer.nid)); class_fail_export(export); class_export_put(export); export = NULL; rc = 0; } else if (export->exp_connection && req->rq_peer.nid != export->exp_connection->c_peer.nid && (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL)) { CWARN("%s: cookie %s seen on new NID %s when " "existing NID %s is already connected\n", target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid), libcfs_nid2str(export->exp_connection->c_peer.nid)); rc = -EALREADY; class_export_put(export); export = NULL; } else if (export->exp_failed) { /* bug 11327 */ CDEBUG(D_HA, "%s: exp %p evict in progress - new cookie needed " "for connect\n", export->exp_obd->obd_name, export); class_export_put(export); export = NULL; rc = -ENODEV; } else if (export->exp_delayed && !(data && data->ocd_connect_flags & OBD_CONNECT_VBR)) { class_fail_export(export); class_export_put(export); export = NULL; GOTO(out, rc = -ENODEV); } else { spin_lock(&export->exp_lock); export->exp_connecting = 1; spin_unlock(&export->exp_lock); class_export_put(export); LASSERT(export->exp_obd == target); rc = target_handle_reconnect(&conn, export, &cluuid); } /* If we found an export, we already unlocked. */ if (!export) { no_export: OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_CONNECT, 2 * obd_timeout); } else if (req->rq_export == NULL && atomic_read(&export->exp_rpc_count) > 0) { CWARN("%s: refuse connection from %s/%s to 0x%p; still busy " "with %d references\n", target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid), export, atomic_read(&export->exp_refcount)); GOTO(out, rc = -EBUSY); } else if (req->rq_export != NULL && atomic_read(&export->exp_rpc_count) > 1) { /* the current connect rpc has increased exp_rpc_count */ CWARN("%s: refuse reconnection from %s@%s to 0x%p; still busy " "with %d active RPCs\n", target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid), export, atomic_read(&export->exp_rpc_count) - 1); spin_lock(&export->exp_lock); if (req->rq_export->exp_conn_cnt < lustre_msg_get_conn_cnt(req->rq_reqmsg)) /* try to abort active requests */ req->rq_export->exp_abort_active_req = 1; spin_unlock(&export->exp_lock); GOTO(out, rc = -EBUSY); } else if (lustre_msg_get_conn_cnt(req->rq_reqmsg) == 1) { CERROR("%s: NID %s (%s) reconnected with 1 conn_cnt; " "cookies not random?\n", target->obd_name, libcfs_nid2str(req->rq_peer.nid), cluuid.uuid); GOTO(out, rc = -EALREADY); } else if (export->exp_delayed && target->obd_recovering) { /* VBR: don't allow delayed connection during recovery */ CWARN("%s: NID %s (%s) export was already marked as delayed " "and will wait for end of recovery\n", target->obd_name, libcfs_nid2str(req->rq_peer.nid), cluuid.uuid); GOTO(out, rc = -EBUSY); } else { OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout); } if (rc < 0) GOTO(out, rc); /* Tell the client if we're in recovery. */ if (target->obd_recovering) { lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECOVERING); /* If this is the first time a client connects, reset the recovery timer */ if (rc == 0) target_start_and_reset_recovery_timer(target, handler, req, !export); } /* We want to handle EALREADY but *not* -EALREADY from * target_handle_reconnect(), return reconnection state in a flag */ if (rc == EALREADY) { lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT); rc = 0; } else { LASSERT(rc == 0); } /* Tell the client if we support replayable requests */ if (target->obd_replayable) lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_REPLAYABLE); client_nid = &req->rq_peer.nid; /* VBR: for delayed connections we start recovery */ if (export && export->exp_delayed && !export->exp_in_recovery) { LASSERT(!target->obd_recovering); LASSERT(data && data->ocd_connect_flags & OBD_CONNECT_VBR); lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_DELAYED | MSG_CONNECT_RECOVERING); spin_lock_bh(&target->obd_processing_task_lock); target->obd_version_recov = 1; spin_unlock_bh(&target->obd_processing_task_lock); target_start_and_reset_recovery_timer(target, handler, req, 1); } if (export == NULL) { if (target->obd_recovering) { CERROR("%s: denying connection for new client %s (%s): " "%d clients in recovery for %lds\n", target->obd_name, libcfs_nid2str(req->rq_peer.nid), cluuid.uuid, target->obd_recoverable_clients, cfs_duration_sec(cfs_time_sub(cfs_timer_deadline(&target->obd_recovery_timer), cfs_time_current()))); rc = -EBUSY; } else { dont_check_exports: rc = obd_connect(&conn, target, &cluuid, data, client_nid); } } else { rc = obd_reconnect(export, target, &cluuid, data, client_nid); } if (rc) GOTO(out, rc); /* Return only the parts of obd_connect_data that we understand, so the * client knows that we don't understand the rest. */ if (data) memcpy(lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*data)), data, sizeof(*data)); /* If all else goes well, this is our RPC return code. */ req->rq_status = 0; lustre_msg_set_handle(req->rq_repmsg, &conn); /* ownership of this export ref transfers to the request AFTER we * drop any previous reference the request had, but we don't want * that to go to zero before we get our new export reference. */ export = class_conn2export(&conn); if (!export) { DEBUG_REQ(D_ERROR, req, "Missing export!"); GOTO(out, rc = -ENODEV); } /* If the client and the server are the same node, we will already * have an export that really points to the client's DLM export, * because we have a shared handles table. * * XXX this will go away when shaver stops sending the "connect" handle * in the real "remote handle" field of the request --phik 24 Apr 2003 */ if (req->rq_export != NULL) class_export_put(req->rq_export); req->rq_export = export; spin_lock(&export->exp_lock); if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) { CERROR("%s: %s already connected at higher conn_cnt: %d > %d\n", cluuid.uuid, libcfs_nid2str(req->rq_peer.nid), export->exp_conn_cnt, lustre_msg_get_conn_cnt(req->rq_reqmsg)); spin_unlock(&export->exp_lock); GOTO(out, rc = -EALREADY); } LASSERT(lustre_msg_get_conn_cnt(req->rq_reqmsg) > 0); export->exp_conn_cnt = lustre_msg_get_conn_cnt(req->rq_reqmsg); export->exp_abort_active_req = 0; /* request from liblustre? Don't evict it for not pinging. */ if (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_LIBCLIENT) { export->exp_libclient = 1; spin_unlock(&export->exp_lock); spin_lock(&target->obd_dev_lock); list_del_init(&export->exp_obd_chain_timed); spin_unlock(&target->obd_dev_lock); } else { spin_unlock(&export->exp_lock); } if (export->exp_connection != NULL) { /* Check to see if connection came from another NID */ if ((export->exp_connection->c_peer.nid != req->rq_peer.nid) && !hlist_unhashed(&export->exp_nid_hash)) lustre_hash_del(export->exp_obd->obd_nid_hash, &export->exp_connection->c_peer.nid, &export->exp_nid_hash); ptlrpc_connection_put(export->exp_connection); } export->exp_connection = ptlrpc_connection_get(req->rq_peer, req->rq_self, &remote_uuid); if (hlist_unhashed(&export->exp_nid_hash)) { lustre_hash_add(export->exp_obd->obd_nid_hash, &export->exp_connection->c_peer.nid, &export->exp_nid_hash); } if (lustre_msg_get_op_flags(req->rq_repmsg) & MSG_CONNECT_RECONNECT) { revimp = class_import_get(export->exp_imp_reverse); ptlrpc_connection_put(revimp->imp_connection); revimp->imp_connection = NULL; GOTO(set_flags, rc = 0); } if (target->obd_recovering && !export->exp_in_recovery) { spin_lock(&export->exp_lock); export->exp_in_recovery = 1; spin_unlock(&export->exp_lock); target->obd_connected_clients++; } memcpy(&conn, lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2, sizeof conn), sizeof conn); if (export->exp_imp_reverse != NULL) class_destroy_import(export->exp_imp_reverse); revimp = export->exp_imp_reverse = class_new_import(target); revimp->imp_client = &export->exp_obd->obd_ldlm_client; revimp->imp_remote_handle = conn; revimp->imp_dlm_fake = 1; revimp->imp_state = LUSTRE_IMP_FULL; set_flags: revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection); if (req->rq_reqmsg->lm_magic == LUSTRE_MSG_MAGIC_V1 && lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_NEXT_VER) { revimp->imp_msg_magic = LUSTRE_MSG_MAGIC_V2; lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_NEXT_VER); } else { /* unknown versions will be caught in * ptlrpc_handle_server_req_in->lustre_unpack_msg() */ revimp->imp_msg_magic = req->rq_reqmsg->lm_magic; } if (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1) { if (export->exp_connect_flags & OBD_CONNECT_AT) revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT; else revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT; } class_import_put(revimp); out: if (export) { spin_lock(&export->exp_lock); export->exp_connecting = 0; spin_unlock(&export->exp_lock); } if (targref) class_decref(targref); if (rc) req->rq_status = rc; RETURN(rc); } int target_handle_disconnect(struct ptlrpc_request *req) { int rc; ENTRY; rc = lustre_pack_reply(req, 1, NULL, NULL); if (rc) RETURN(rc); /* keep the rq_export around so we can send the reply */ req->rq_status = obd_disconnect(class_export_get(req->rq_export)); RETURN(0); } void target_destroy_export(struct obd_export *exp) { /* exports created from last_rcvd data, and "fake" exports created by lctl don't have an import */ if (exp->exp_imp_reverse != NULL) class_destroy_import(exp->exp_imp_reverse); /* We cancel locks at disconnect time, but this will catch any locks * granted in a race with recovery-induced disconnect. */ if (exp->exp_obd->obd_namespace != NULL) ldlm_cancel_locks_for_export(exp); } /* * Recovery functions */ static int target_exp_enqueue_req_replay(struct ptlrpc_request *req) { __u64 transno = lustre_msg_get_transno(req->rq_reqmsg); struct obd_export *exp = req->rq_export; struct ptlrpc_request *reqiter; int dup = 0; LASSERT(exp); spin_lock(&exp->exp_lock); list_for_each_entry(reqiter, &exp->exp_req_replay_queue, rq_replay_list) { if (lustre_msg_get_transno(reqiter->rq_reqmsg) == transno) { dup = 1; break; } } if (dup) { /* we expect it with RESENT and REPLAY flags */ if ((lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) != (MSG_RESENT | MSG_REPLAY)) CERROR("invalid flags %x of resent replay\n", lustre_msg_get_flags(req->rq_reqmsg)); } else { list_add_tail(&req->rq_replay_list, &exp->exp_req_replay_queue); } spin_unlock(&exp->exp_lock); return dup; } static void target_exp_dequeue_req_replay(struct ptlrpc_request *req) { LASSERT(!list_empty(&req->rq_replay_list)); LASSERT(req->rq_export); spin_lock(&req->rq_export->exp_lock); list_del_init(&req->rq_replay_list); spin_unlock(&req->rq_export->exp_lock); } static void target_request_copy_get(struct ptlrpc_request *req) { /* mark that request is in recovery queue, so request handler will not * drop rpc count in export, bug 19870*/ LASSERT(!req->rq_copy_queued); spin_lock(&req->rq_lock); req->rq_copy_queued = 1; spin_unlock(&req->rq_lock); /* increase refcount to keep request in queue */ atomic_inc(&req->rq_refcount); /* release service thread while request is queued * we are moving the request from active processing * to waiting on the replay queue */ ptlrpc_server_active_request_dec(req); } static void target_request_copy_put(struct ptlrpc_request *req) { LASSERTF(list_empty(&req->rq_replay_list), "next: %p, prev: %p\n", req->rq_replay_list.next, req->rq_replay_list.prev); /* class_export_rpc_get was done before handling request, * drop it early to allow new requests, see bug 19870. */ LASSERT(req->rq_copy_queued); class_export_rpc_put(req->rq_export); /* ptlrpc_server_drop_request() assumes the request is active */ ptlrpc_server_active_request_inc(req); ptlrpc_server_drop_request(req); } static void target_send_delayed_replies(struct obd_device *obd) { int max_clients = obd->obd_max_recoverable_clients; struct ptlrpc_request *req, *tmp; time_t elapsed_time = max_t(time_t, 1, cfs_time_current_sec() - obd->obd_recovery_start); LCONSOLE_INFO("%s: Recovery period over after %d:%.02d, of %d clients " "%d recovered and %d %s evicted.\n", obd->obd_name, (int)elapsed_time/60, (int)elapsed_time%60, max_clients, obd->obd_connected_clients, obd->obd_stale_clients, obd->obd_stale_clients == 1 ? "was" : "were"); LCONSOLE_INFO("%s: sending delayed replies to recovered clients\n", obd->obd_name); list_for_each_entry_safe(req, tmp, &obd->obd_delayed_reply_queue, rq_list) { list_del_init(&req->rq_list); DEBUG_REQ(D_HA, req, "delayed:"); ptlrpc_reply(req); target_request_copy_put(req); } obd->obd_recovery_end = cfs_time_current_sec(); } static void target_finish_recovery(struct obd_device *obd) { OBD_RACE(OBD_FAIL_TGT_REPLAY_DELAY); ldlm_reprocess_all_ns(obd->obd_namespace); spin_lock_bh(&obd->obd_processing_task_lock); if (list_empty(&obd->obd_recovery_queue)) { obd->obd_recovery_thread = NULL; obd->obd_processing_task = 0; } else { spin_unlock_bh(&obd->obd_processing_task_lock); CERROR("%s: Recovery queue isn't empty\n", obd->obd_name); LBUG(); } spin_unlock_bh(&obd->obd_processing_task_lock); ; /* when recovery finished, cleanup orphans on mds and ost */ if (OBT(obd) && OBP(obd, postrecov)) { int rc = OBP(obd, postrecov)(obd); if (rc < 0) LCONSOLE_WARN("%s: Post recovery failed, rc %d\n", obd->obd_name, rc); } target_send_delayed_replies(obd); } static void abort_recovery_queue(struct obd_device *obd) { struct ptlrpc_request *req, *n; struct list_head abort_list; int rc; CFS_INIT_LIST_HEAD(&abort_list); spin_lock_bh(&obd->obd_processing_task_lock); list_splice_init(&obd->obd_recovery_queue, &abort_list); spin_unlock_bh(&obd->obd_processing_task_lock); /* process abort list unlocked */ list_for_each_entry_safe(req, n, &abort_list, rq_list) { target_exp_dequeue_req_replay(req); list_del_init(&req->rq_list); DEBUG_REQ(D_ERROR, req, "%s: aborted:", obd->obd_name); req->rq_status = -ENOTCONN; req->rq_type = PTL_RPC_MSG_ERR; rc = lustre_pack_reply(req, 1, NULL, NULL); if (rc == 0) ptlrpc_reply(req); else DEBUG_REQ(D_ERROR, req, "packing failed for abort-reply; skipping"); target_request_copy_put(req); } } /* Called from a cleanup function if the device is being cleaned up forcefully. The exports should all have been disconnected already, the only thing left to do is - clear the recovery flags - cancel the timer - free queued requests and replies, but don't send replies Because the obd_stopping flag is set, no new requests should be received. */ void target_cleanup_recovery(struct obd_device *obd) { struct list_head *tmp, *n; struct ptlrpc_request *req; struct list_head clean_list; ENTRY; LASSERT(obd->obd_stopping); spin_lock_bh(&obd->obd_processing_task_lock); if (!obd->obd_recovering) { spin_unlock_bh(&obd->obd_processing_task_lock); EXIT; return; } obd->obd_recovering = obd->obd_abort_recovery = 0; target_cancel_recovery_timer(obd); spin_unlock_bh(&obd->obd_processing_task_lock); list_for_each_safe(tmp, n, &obd->obd_delayed_reply_queue) { req = list_entry(tmp, struct ptlrpc_request, rq_list); list_del(&req->rq_list); target_request_copy_put(req); } CFS_INIT_LIST_HEAD(&clean_list); spin_lock_bh(&obd->obd_processing_task_lock); list_splice_init(&obd->obd_recovery_queue, &clean_list); cfs_waitq_signal(&obd->obd_next_transno_waitq); spin_unlock_bh(&obd->obd_processing_task_lock); list_for_each_safe(tmp, n, &clean_list) { req = list_entry(tmp, struct ptlrpc_request, rq_list); target_exp_dequeue_req_replay(req); list_del_init(&req->rq_list); target_request_copy_put(req); } EXIT; } void target_stop_recovery(void *data, int abort) { struct obd_device *obd = data; enum obd_option flags; ENTRY; spin_lock_bh(&obd->obd_processing_task_lock); if (!obd->obd_recovering) { spin_unlock_bh(&obd->obd_processing_task_lock); EXIT; return; } flags = exp_flags_from_obd(obd) | OBD_OPT_ABORT_RECOV; obd->obd_recovering = 0; obd->obd_abort_recovery = 0; obd->obd_processing_task = 0; if (abort == 0) LASSERT(obd->obd_recoverable_clients == 0); target_cancel_recovery_timer(obd); spin_unlock_bh(&obd->obd_processing_task_lock); if (abort) { LCONSOLE_WARN("%s: recovery is aborted by administrative " "request; %d clients are not recovered " "(%d clients did)\n", obd->obd_name, obd->obd_recoverable_clients, obd->obd_connected_clients); class_disconnect_stale_exports(obd, flags); } abort_recovery_queue(obd); target_finish_recovery(obd); CDEBUG(D_HA, "%s: recovery complete\n", obd_uuid2str(&obd->obd_uuid)); EXIT; } void target_abort_recovery(void *data) { target_stop_recovery(data, 1); } static void reset_recovery_timer(struct obd_device *, int, int); static void target_recovery_expired(unsigned long castmeharder) { struct obd_device *obd = (struct obd_device *)castmeharder; CDEBUG(D_HA, "%s: recovery period over; %d clients never reconnected " "after %lds (%d clients did)\n", obd->obd_name, obd->obd_recoverable_clients, cfs_time_current_sec() - obd->obd_recovery_start, obd->obd_connected_clients); spin_lock_bh(&obd->obd_processing_task_lock); obd->obd_abort_recovery = 1; cfs_waitq_signal(&obd->obd_next_transno_waitq); spin_unlock_bh(&obd->obd_processing_task_lock); /* bug 18948: * The recovery timer expired and target_check_and_stop_recovery() * must be called. We cannot call it directly because we are in * interrupt context, so we need to wake up another thread to call it. * This may happen if there are obd->obd_next_transno_waitq waiters, * or if we happen to handle a connect request. However, we cannot * count on either of those things so we wake up the ping evictor * and leverage it's context to complete recovery. * * Note: HEAD has a separate recovery thread and handle this. */ spin_lock(&obd->obd_dev_lock); ping_evictor_wake(obd->obd_self_export); spin_unlock(&obd->obd_dev_lock); } /* obd_processing_task_lock should be held */ void target_cancel_recovery_timer(struct obd_device *obd) { CDEBUG(D_HA, "%s: cancel recovery timer\n", obd->obd_name); cfs_timer_disarm(&obd->obd_recovery_timer); } /* extend = 1 means require at least "duration" seconds left in the timer, extend = 0 means set the total duration (start_recovery_timer) */ static void reset_recovery_timer(struct obd_device *obd, int duration, int extend) { cfs_time_t now = cfs_time_current_sec(); cfs_duration_t left; spin_lock_bh(&obd->obd_processing_task_lock); if (!obd->obd_recovering) { spin_unlock_bh(&obd->obd_processing_task_lock); return; } left = cfs_time_sub(obd->obd_recovery_end, now); if (extend && (duration > left)) obd->obd_recovery_timeout += duration - left; else if (!extend && (duration > obd->obd_recovery_timeout)) /* Track the client's largest expected replay time */ obd->obd_recovery_timeout = duration; /* Hard limit of obd_recovery_time_hard which should not happen */ if(obd->obd_recovery_timeout > obd->obd_recovery_time_hard) obd->obd_recovery_timeout = obd->obd_recovery_time_hard; obd->obd_recovery_end = obd->obd_recovery_start + obd->obd_recovery_timeout; if (cfs_time_before(now, obd->obd_recovery_end)) { left = cfs_time_sub(obd->obd_recovery_end, now); cfs_timer_arm(&obd->obd_recovery_timer, cfs_time_shift(left)); } spin_unlock_bh(&obd->obd_processing_task_lock); CDEBUG(D_HA, "%s: recovery timer will expire in %u seconds\n", obd->obd_name, (unsigned)left); } static void check_and_start_recovery_timer(struct obd_device *obd, svc_handler_t handler) { spin_lock_bh(&obd->obd_processing_task_lock); if (obd->obd_recovery_handler) { spin_unlock_bh(&obd->obd_processing_task_lock); return; } CDEBUG(D_HA, "%s: starting recovery timer\n", obd->obd_name); obd->obd_recovery_start = cfs_time_current_sec(); obd->obd_recovery_handler = handler; cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd); spin_unlock_bh(&obd->obd_processing_task_lock); reset_recovery_timer(obd, obd->obd_recovery_timeout, 0); } /* Reset the timer with each new client connection */ /* * This timer is actually reconnect_timer, which is for making sure * the total recovery window is at least as big as my reconnect * attempt timing. So the initial recovery time_out will be set to * OBD_RECOVERY_FACTOR * obd_timeout. If the timeout coming * from client is bigger than this, then the recovery time_out will * be extend to make sure the client could be reconnected, in the * process, the timeout from the new client should be ignored. */ static void target_start_and_reset_recovery_timer(struct obd_device *obd, svc_handler_t handler, struct ptlrpc_request *req, int new_client) { int service_time = lustre_msg_get_service_time(req->rq_reqmsg); if (!new_client && service_time) /* Teach server about old server's estimates, as first guess at how long new requests will take. */ at_measured(&req->rq_rqbd->rqbd_service->srv_at_estimate, service_time); check_and_start_recovery_timer(obd, handler); /* convert the service time to rpc timeout, * reuse service_time to limit stack usage */ service_time = at_est2timeout(service_time); /* We expect other clients to timeout within service_time, then try * to reconnect, then try the failover server. The max delay between * connect attempts is SWITCH_MAX + SWITCH_INC + INITIAL */ service_time += 2 * (CONNECTION_SWITCH_MAX + CONNECTION_SWITCH_INC + INITIAL_CONNECT_TIMEOUT); if (service_time > obd->obd_recovery_timeout && !new_client) reset_recovery_timer(obd, service_time, 0); } static int check_for_next_transno(struct obd_device *obd) { struct ptlrpc_request *req; int wake_up = 0, connected, completed, queue_len, max; __u64 next_transno, req_transno; if (obd->obd_stopping) { CDEBUG(D_HA, "waking for stopping device\n"); return 1; } spin_lock_bh(&obd->obd_processing_task_lock); if (obd->obd_abort_recovery) { CDEBUG(D_HA, "waking for aborted recovery\n"); spin_unlock_bh(&obd->obd_processing_task_lock); return 1; } else if (!obd->obd_recovering) { CDEBUG(D_HA, "waking for completed recovery (?)\n"); spin_unlock_bh(&obd->obd_processing_task_lock); return 1; } LASSERT(!list_empty(&obd->obd_recovery_queue)); req = list_entry(obd->obd_recovery_queue.next, struct ptlrpc_request, rq_list); max = obd->obd_max_recoverable_clients; req_transno = lustre_msg_get_transno(req->rq_reqmsg); connected = obd->obd_connected_clients; completed = max - obd->obd_recoverable_clients - obd->obd_delayed_clients; queue_len = obd->obd_requests_queued_for_recovery; next_transno = obd->obd_next_recovery_transno; CDEBUG(D_HA,"max: %d, connected: %d, delayed %d, completed: %d, " "queue_len: %d, req_transno: "LPU64", next_transno: "LPU64"\n", max, connected, obd->obd_delayed_clients, completed, queue_len, req_transno, next_transno); if (req_transno == next_transno) { CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno); wake_up = 1; } else if (queue_len == obd->obd_recoverable_clients) { CDEBUG(D_ERROR, "%s: waking for skipped transno (skip: "LPD64 ", ql: %d, comp: %d, conn: %d, next: "LPD64")\n", obd->obd_name, next_transno, queue_len, completed, max, req_transno); obd->obd_next_recovery_transno = req_transno; wake_up = 1; } spin_unlock_bh(&obd->obd_processing_task_lock); LASSERT(lustre_msg_get_transno(req->rq_reqmsg) >= next_transno); return wake_up; } static void process_recovery_queue(struct obd_device *obd) { struct ptlrpc_request *req; struct l_wait_info lwi = { 0 }; ENTRY; for (;;) { spin_lock_bh(&obd->obd_processing_task_lock); if (!obd->obd_recovering) { spin_unlock_bh(&obd->obd_processing_task_lock); EXIT; return; } LASSERTF(obd->obd_processing_task == cfs_curproc_pid(), "%s: invalid pid in obd_processing_task (%d != %d)\n", obd->obd_name, obd->obd_processing_task, cfs_curproc_pid()); req = list_entry(obd->obd_recovery_queue.next, struct ptlrpc_request, rq_list); if (lustre_msg_get_transno(req->rq_reqmsg) != obd->obd_next_recovery_transno) { spin_unlock_bh(&obd->obd_processing_task_lock); CDEBUG(D_HA, "%s: waiting for transno "LPD64" (1st is " LPD64", x"LPU64")\n", obd->obd_name, obd->obd_next_recovery_transno, lustre_msg_get_transno(req->rq_reqmsg), req->rq_xid); l_wait_event(obd->obd_next_transno_waitq, check_for_next_transno(obd), &lwi); if (target_recovery_check_and_stop(obd)) { EXIT; return; } continue; } list_del_init(&req->rq_list); LASSERT(obd->obd_recovery_thread); /* replace request initial thread with current one, bug #18221 */ req->rq_svc_thread = obd->obd_recovery_thread; obd->obd_requests_queued_for_recovery--; spin_unlock_bh(&obd->obd_processing_task_lock); DEBUG_REQ(D_HA, req, "processing: "); (void)obd->obd_recovery_handler(req); obd->obd_replayed_requests++; /* Extend the recovery timer enough to complete the next * replayed rpc */ reset_recovery_timer(obd, AT_OFF ? obd_timeout : at_get(&req->rq_rqbd->rqbd_service->srv_at_estimate), 1); /* bug 1580: decide how to properly sync() in recovery */ //mds_fsync_super(obd->u.obt.obt_sb); spin_lock_bh(&obd->obd_processing_task_lock); obd->obd_next_recovery_transno++; spin_unlock_bh(&obd->obd_processing_task_lock); target_exp_dequeue_req_replay(req); target_request_copy_put(req); OBD_RACE(OBD_FAIL_TGT_REPLAY_DELAY); spin_lock_bh(&obd->obd_processing_task_lock); if (list_empty(&obd->obd_recovery_queue)) { obd->obd_processing_task = 0; obd->obd_recovery_thread = NULL; spin_unlock_bh(&obd->obd_processing_task_lock); break; } spin_unlock_bh(&obd->obd_processing_task_lock); } EXIT; } int target_queue_recovery_request(struct ptlrpc_request *req, struct obd_device *obd) { struct list_head *tmp; int inserted = 0; __u64 transno = lustre_msg_get_transno(req->rq_reqmsg); ENTRY; /* CAVEAT EMPTOR: The incoming request message has been swabbed * (i.e. buflens etc are in my own byte order), but type-dependent * buffers (eg mds_body, ost_body etc) have NOT been swabbed. */ if (!transno) { CFS_INIT_LIST_HEAD(&req->rq_list); DEBUG_REQ(D_HA, req, "not queueing"); RETURN(1); } spin_lock_bh(&obd->obd_processing_task_lock); if (!obd->obd_recovering) { spin_unlock_bh(&obd->obd_processing_task_lock); RETURN(0); } /* If we're processing the queue, we want don't want to queue this * message. * * Also, if this request has a transno less than the one we're waiting * for, we should process it now. It could (and currently always will) * be an open request for a descriptor that was opened some time ago. * * Also, a resent, replayed request that has already been * handled will pass through here and be processed immediately. */ if (obd->obd_processing_task == cfs_curproc_pid() || transno < obd->obd_next_recovery_transno) { /* Processing the queue right now, don't re-add. */ LASSERT(list_empty(&req->rq_list)); spin_unlock_bh(&obd->obd_processing_task_lock); RETURN(1); } if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP))) { spin_unlock_bh(&obd->obd_processing_task_lock); RETURN(0); } if (target_exp_enqueue_req_replay(req)) { spin_unlock_bh(&obd->obd_processing_task_lock); DEBUG_REQ(D_ERROR, req, "%s: dropping resent queued req", obd->obd_name); RETURN(0); } /* XXX O(n^2) */ list_for_each(tmp, &obd->obd_recovery_queue) { struct ptlrpc_request *reqiter = list_entry(tmp, struct ptlrpc_request, rq_list); if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) { list_add_tail(&req->rq_list, &reqiter->rq_list); inserted = 1; break; } if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) == transno)) { spin_unlock_bh(&obd->obd_processing_task_lock); DEBUG_REQ(D_ERROR, req, "%s: dropping replay: transno " "has been claimed by another client", obd->obd_name); target_exp_dequeue_req_replay(req); RETURN(0); } } if (!inserted) { list_add_tail(&req->rq_list, &obd->obd_recovery_queue); } target_request_copy_get(req); obd->obd_requests_queued_for_recovery++; if (obd->obd_processing_task != 0) { /* Someone else is processing this queue, we'll leave it to * them. */ cfs_waitq_signal(&obd->obd_next_transno_waitq); spin_unlock_bh(&obd->obd_processing_task_lock); RETURN(0); } /* Nobody is processing, and we know there's (at least) one to process * now, so we'll do the honours. */ obd->obd_processing_task = cfs_curproc_pid(); /* save thread that handle recovery queue */ obd->obd_recovery_thread = req->rq_svc_thread; spin_unlock_bh(&obd->obd_processing_task_lock); process_recovery_queue(obd); RETURN(0); } struct obd_device * target_req2obd(struct ptlrpc_request *req) { return req->rq_export->exp_obd; } int target_queue_last_replay_reply(struct ptlrpc_request *req, int rc) { struct obd_device *obd = target_req2obd(req); struct obd_export *exp = req->rq_export; int recovery_done = 0, delayed_done = 0; LASSERT ((rc == 0) == req->rq_packed_final); if (!req->rq_packed_final) { /* Just like ptlrpc_error, but without the sending. */ rc = lustre_pack_reply(req, 1, NULL, NULL); if (rc) return rc; req->rq_type = PTL_RPC_MSG_ERR; } LASSERT(!req->rq_reply_state->rs_difficult); LASSERT(list_empty(&req->rq_list)); /* Don't race cleanup */ spin_lock_bh(&obd->obd_processing_task_lock); if (obd->obd_stopping) { spin_unlock_bh(&obd->obd_processing_task_lock); goto out_noconn; } if (!exp->exp_vbr_failed) { target_request_copy_get(req); list_add(&req->rq_list, &obd->obd_delayed_reply_queue); } /* only count the first "replay over" request from each export */ if (exp->exp_replay_needed) { spin_lock(&exp->exp_lock); exp->exp_replay_needed = 0; spin_unlock(&exp->exp_lock); if (!exp->exp_delayed) { --obd->obd_recoverable_clients; } else { spin_lock(&exp->exp_lock); exp->exp_delayed = 0; spin_unlock(&exp->exp_lock); delayed_done = 1; if (obd->obd_delayed_clients == 0) { spin_unlock_bh(&obd->obd_processing_task_lock); LBUG(); } --obd->obd_delayed_clients; } } recovery_done = (obd->obd_recoverable_clients == 0); spin_unlock_bh(&obd->obd_processing_task_lock); if (delayed_done) { /* start pinging export */ spin_lock(&obd->obd_dev_lock); list_add_tail(&exp->exp_obd_chain_timed, &obd->obd_exports_timed); list_move_tail(&exp->exp_obd_chain, &obd->obd_exports); spin_unlock(&obd->obd_dev_lock); target_send_delayed_replies(obd); } OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS); if (recovery_done) { spin_lock_bh(&obd->obd_processing_task_lock); obd->obd_recovering = 0; obd->obd_version_recov = 0; obd->obd_abort_recovery = 0; target_cancel_recovery_timer(obd); spin_unlock_bh(&obd->obd_processing_task_lock); if (!delayed_done) target_finish_recovery(obd); CDEBUG(D_HA, "%s: recovery complete\n", obd_uuid2str(&obd->obd_uuid)); } else { CWARN("%s: %d recoverable clients remain\n", obd->obd_name, obd->obd_recoverable_clients); cfs_waitq_signal(&obd->obd_next_transno_waitq); } /* VBR: disconnect export with failed recovery */ if (exp->exp_vbr_failed) { CWARN("%s: disconnect export %s\n", obd->obd_name, exp->exp_client_uuid.uuid); class_fail_export(exp); req->rq_status = 0; ptlrpc_send_reply(req, 0); } return 1; out_noconn: req->rq_status = -ENOTCONN; /* rv is ignored anyhow */ return -ENOTCONN; } int target_handle_reply(struct ptlrpc_request *req, int rc, int fail) { struct obd_device *obd = NULL; if (req->rq_export) obd = target_req2obd(req); /* handle replay reply for version recovery */ if (obd && obd->obd_version_recov && (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)) { LASSERT(req->rq_repmsg); lustre_msg_add_flags(req->rq_repmsg, MSG_VERSION_REPLAY); } /* handle last replay */ if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) { if (obd && lustre_msg_get_flags(req->rq_reqmsg) & MSG_DELAY_REPLAY) { DEBUG_REQ(D_HA, req, "delayed LAST_REPLAY, queuing reply"); rc = target_queue_last_replay_reply(req, rc); LASSERT(req->rq_export->exp_delayed == 0); return rc; } if (obd && obd->obd_recovering) { /* normal recovery */ DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply"); rc = target_queue_last_replay_reply(req, rc); return rc; } /* Lost a race with recovery; let the error path DTRT. */ rc = req->rq_status = -ENOTCONN; } target_send_reply(req, rc, fail); return 0; } static inline struct ldlm_pool *ldlm_exp2pl(struct obd_export *exp) { LASSERT(exp != NULL); return &exp->exp_obd->obd_namespace->ns_pool; } int target_pack_pool_reply(struct ptlrpc_request *req) { struct obd_device *obd; ENTRY; /* * Check that we still have all structures alive as this may * be some late rpc in shutdown time. */ if (unlikely(!req->rq_export || !req->rq_export->exp_obd || !exp_connect_lru_resize(req->rq_export))) { lustre_msg_set_slv(req->rq_repmsg, 0); lustre_msg_set_limit(req->rq_repmsg, 0); RETURN(0); } /* * OBD is alive here as export is alive, which we checked above. */ obd = req->rq_export->exp_obd; read_lock(&obd->obd_pool_lock); lustre_msg_set_slv(req->rq_repmsg, obd->obd_pool_slv); lustre_msg_set_limit(req->rq_repmsg, obd->obd_pool_limit); read_unlock(&obd->obd_pool_lock); RETURN(0); } int target_send_reply_msg (struct ptlrpc_request *req, int rc, int fail_id) { if (OBD_FAIL_CHECK(fail_id | OBD_FAIL_ONCE)) { obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED; DEBUG_REQ(D_ERROR, req, "dropping reply"); return (-ECOMM); } if (rc) { DEBUG_REQ(D_ERROR, req, "processing error (%d)", rc); req->rq_status = rc; return (ptlrpc_send_error(req, 1)); } else { DEBUG_REQ(D_NET, req, "sending reply"); } return (ptlrpc_send_reply(req, PTLRPC_REPLY_MAYBE_DIFFICULT)); } void target_send_reply(struct ptlrpc_request *req, int rc, int fail_id) { int netrc; struct ptlrpc_reply_state *rs; struct obd_device *obd; struct obd_export *exp; struct ptlrpc_service *svc; svc = req->rq_rqbd->rqbd_service; rs = req->rq_reply_state; if (rs == NULL || !rs->rs_difficult) { /* no notifiers */ target_send_reply_msg (req, rc, fail_id); return; } /* must be an export if locks saved */ LASSERT (req->rq_export != NULL); /* req/reply consistent */ LASSERT (rs->rs_service == svc); /* "fresh" reply */ LASSERT (!rs->rs_scheduled); LASSERT (!rs->rs_scheduled_ever); LASSERT (!rs->rs_handled); LASSERT (!rs->rs_on_net); LASSERT (rs->rs_export == NULL); LASSERT (list_empty(&rs->rs_obd_list)); LASSERT (list_empty(&rs->rs_exp_list)); exp = class_export_get(req->rq_export); obd = exp->exp_obd; /* disable reply scheduling onto srv_reply_queue while I'm setting up */ rs->rs_scheduled = 1; rs->rs_on_net = 1; rs->rs_xid = req->rq_xid; rs->rs_transno = req->rq_transno; rs->rs_export = exp; spin_lock(&exp->exp_uncommitted_replies_lock); /* VBR: use exp_last_committed */ if (rs->rs_transno > exp->exp_last_committed) { /* not committed already */ list_add_tail (&rs->rs_obd_list, &exp->exp_uncommitted_replies); } spin_unlock (&exp->exp_uncommitted_replies_lock); spin_lock (&exp->exp_lock); list_add_tail (&rs->rs_exp_list, &exp->exp_outstanding_replies); spin_unlock(&exp->exp_lock); netrc = target_send_reply_msg (req, rc, fail_id); spin_lock(&svc->srv_lock); svc->srv_n_difficult_replies++; if (netrc != 0) { /* error sending: reply is off the net. Also we need +1 * reply ref until ptlrpc_server_handle_reply() is done * with the reply state (if the send was successful, there * would have been +1 ref for the net, which * reply_out_callback leaves alone) */ rs->rs_on_net = 0; ptlrpc_rs_addref(rs); atomic_inc (&svc->srv_outstanding_replies); } if (!rs->rs_on_net || /* some notifier */ list_empty(&rs->rs_exp_list) || /* completed already */ list_empty(&rs->rs_obd_list)) { list_add_tail (&rs->rs_list, &svc->srv_reply_queue); cfs_waitq_signal (&svc->srv_waitq); } else { list_add (&rs->rs_list, &svc->srv_active_replies); rs->rs_scheduled = 0; /* allow notifier to schedule */ } spin_unlock(&svc->srv_lock); } int target_handle_ping(struct ptlrpc_request *req) { if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY && req->rq_export->exp_in_recovery) { spin_lock(&req->rq_export->exp_lock); req->rq_export->exp_in_recovery = 0; spin_unlock(&req->rq_export->exp_lock); } obd_ping(req->rq_export); return lustre_pack_reply(req, 1, NULL, NULL); } void target_committed_to_req(struct ptlrpc_request *req) { struct obd_export *exp = req->rq_export; if (!exp->exp_obd->obd_no_transno && req->rq_repmsg != NULL) { lustre_msg_set_last_committed(req->rq_repmsg, exp->exp_last_committed); } else { DEBUG_REQ(D_IOCTL, req, "not sending last_committed update (%d/" "%d)", exp->exp_obd->obd_no_transno, req->rq_repmsg == NULL); } CDEBUG(D_INFO, "last_committed x"LPU64", this req x"LPU64"\n", exp->exp_obd->obd_last_committed, req->rq_xid); } EXPORT_SYMBOL(target_committed_to_req); int target_handle_qc_callback(struct ptlrpc_request *req) { struct obd_quotactl *oqctl; struct client_obd *cli = &req->rq_export->exp_obd->u.cli; oqctl = lustre_swab_reqbuf(req, REQ_REC_OFF, sizeof(*oqctl), lustre_swab_obd_quotactl); if (oqctl == NULL) { CERROR("Can't unpack obd_quatactl\n"); RETURN(-EPROTO); } cli->cl_qchk_stat = oqctl->qc_stat; return 0; } #ifdef HAVE_QUOTA_SUPPORT int target_handle_dqacq_callback(struct ptlrpc_request *req) { #ifdef __KERNEL__ struct obd_device *obd = req->rq_export->exp_obd; struct obd_device *master_obd = NULL, *lov_obd = NULL; struct lustre_quota_ctxt *qctxt; struct qunit_data *qdata = NULL; int rc = 0; int repsize[2] = { sizeof(struct ptlrpc_body), 0 }; ENTRY; if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_DROP_QUOTA_REQ)) RETURN(rc); repsize[1] = quota_get_qunit_data_size(req->rq_export-> exp_connect_flags); rc = lustre_pack_reply(req, 2, repsize, NULL); if (rc) RETURN(rc); LASSERT(req->rq_export); /* there are three forms of qunit(historic causes), so we need to * adjust qunits from slaves to the same form here */ OBD_ALLOC(qdata, sizeof(struct qunit_data)); if (!qdata) RETURN(-ENOMEM); rc = quota_get_qdata(req, qdata, QUOTA_REQUEST, QUOTA_EXPORT); if (rc < 0) { CDEBUG(D_ERROR, "Can't unpack qunit_data(rc: %d)\n", rc); GOTO(out, rc); } /* we use the observer */ if (obd_pin_observer(obd, &lov_obd) || obd_pin_observer(lov_obd, &master_obd)) { CERROR("Can't find the observer, it is recovering\n"); req->rq_status = -EAGAIN; GOTO(send_reply, rc = -EAGAIN); } qctxt = &master_obd->u.obt.obt_qctxt; if (!qctxt->lqc_setup) { /* quota_type has not been processed yet, return EAGAIN * until we know whether or not quotas are supposed to * be enabled */ CDEBUG(D_QUOTA, "quota_type not processed yet, return " "-EAGAIN\n"); req->rq_status = -EAGAIN; rc = ptlrpc_reply(req); GOTO(out, rc); } LASSERT(qctxt->lqc_handler); rc = qctxt->lqc_handler(master_obd, qdata, lustre_msg_get_opc(req->rq_reqmsg)); if (rc && rc != -EDQUOT) CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR, "dqacq failed! (rc:%d)\n", rc); req->rq_status = rc; /* there are three forms of qunit(historic causes), so we need to * adjust the same form to different forms slaves needed */ rc = quota_copy_qdata(req, qdata, QUOTA_REPLY, QUOTA_EXPORT); if (rc < 0) { CDEBUG(D_ERROR, "Can't pack qunit_data(rc: %d)\n", rc); GOTO(out, rc); } /* Block the quota req. b=14840 */ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_BLOCK_QUOTA_REQ, obd_timeout); send_reply: rc = ptlrpc_reply(req); out: if (master_obd) obd_unpin_observer(lov_obd); if (lov_obd) obd_unpin_observer(obd); OBD_FREE(qdata, sizeof(struct qunit_data)); RETURN(rc); #else return 0; #endif /* !__KERNEL__ */ } #endif /* HAVE_QUOTA_SUPPORT */ ldlm_mode_t lck_compat_array[] = { [LCK_EX] LCK_COMPAT_EX, [LCK_PW] LCK_COMPAT_PW, [LCK_PR] LCK_COMPAT_PR, [LCK_CW] LCK_COMPAT_CW, [LCK_CR] LCK_COMPAT_CR, [LCK_NL] LCK_COMPAT_NL, [LCK_GROUP] LCK_COMPAT_GROUP };