/* -*- 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. */ #ifndef EXPORT_SYMTAB # define EXPORT_SYMTAB #endif #define DEBUG_SUBSYSTEM S_LDLM #ifdef __KERNEL__ # include #else # include #endif #include #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); } } cfs_spin_lock(&imp->imp_lock); cfs_list_for_each_entry(item, &imp->imp_conn_list, oic_item) { if (obd_uuid_equals(uuid, &item->oic_uuid)) { if (priority) { cfs_list_del(&item->oic_item); cfs_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" : "")); cfs_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) cfs_list_add(&imp_conn->oic_item, &imp->imp_conn_list); else cfs_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 { cfs_spin_unlock(&imp->imp_lock); GOTO(out_free, rc = -ENOENT); } cfs_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; cfs_spin_lock(&imp->imp_lock); if (cfs_list_empty(&imp->imp_conn_list)) { LASSERT(!imp->imp_connection); GOTO(out, rc); } cfs_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; } } cfs_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: cfs_spin_unlock(&imp->imp_lock); if (rc == -ENOENT) CERROR("connection %s not found\n", uuid->uuid); RETURN(rc); } void client_destroy_import(struct obd_import *imp) { /* drop security policy instance after all rpc finished/aborted * to let all busy contexts be released. */ class_import_get(imp); class_destroy_import(imp); sptlrpc_import_sec_put(imp); class_import_put(imp); } /* 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, struct lustre_cfg *lcfg) { 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; cli->cl_sp_me = LUSTRE_SP_CLI; cli->cl_sp_to = LUSTRE_SP_OST; } else if (!strcmp(name, LUSTRE_MDC_NAME)) { rq_portal = MDS_REQUEST_PORTAL; rp_portal = MDC_REPLY_PORTAL; connect_op = MDS_CONNECT; cli->cl_sp_me = LUSTRE_SP_CLI; cli->cl_sp_to = LUSTRE_SP_MDT; } else if (!strcmp(name, LUSTRE_MGC_NAME)) { rq_portal = MGS_REQUEST_PORTAL; rp_portal = MGC_REPLY_PORTAL; connect_op = MGS_CONNECT; cli->cl_sp_me = LUSTRE_SP_MGC; cli->cl_sp_to = LUSTRE_SP_MGS; cli->cl_flvr_mgc.sf_rpc = SPTLRPC_FLVR_INVALID; } 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); } cfs_init_rwsem(&cli->cl_sem); cfs_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 > cfs_num_physpages / 8) cli->cl_dirty_max = cfs_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; cfs_spin_lock_init(&cli->cl_read_rpc_hist.oh_lock); cfs_spin_lock_init(&cli->cl_write_rpc_hist.oh_lock); cfs_spin_lock_init(&cli->cl_read_page_hist.oh_lock); cfs_spin_lock_init(&cli->cl_write_page_hist.oh_lock); cfs_spin_lock_init(&cli->cl_read_offset_hist.oh_lock); cfs_spin_lock_init(&cli->cl_write_offset_hist.oh_lock); cfs_waitq_init(&cli->cl_destroy_waitq); cfs_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 cfs_atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS); cfs_atomic_set(&cli->cl_quota_resends, CLIENT_QUOTA_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 (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 128 /* MB */) { cli->cl_max_rpcs_in_flight = 2; } else if (cfs_num_physpages >> (20 - CFS_PAGE_SHIFT) <= 256 /* MB */) { cli->cl_max_rpcs_in_flight = 3; } else if (cfs_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); cfs_spin_lock(&imp->imp_lock); imp->imp_deactive = 1; cfs_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(const struct lu_env *env, struct obd_export **exp, 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_connect_data *ocd; struct lustre_handle conn = { 0 }; int rc; ENTRY; *exp = NULL; cfs_down_write(&cli->cl_sem); if (cli->cl_conn_count > 0 ) GOTO(out_sem, rc = -EALREADY); rc = class_connect(&conn, obd, cluuid); if (rc) GOTO(out_sem, rc); cli->cl_conn_count++; *exp = class_conn2export(&conn); LASSERT(obd->obd_namespace); imp->imp_dlm_handle = conn; 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) { LASSERTF((ocd->ocd_connect_flags & data->ocd_connect_flags) == ocd->ocd_connect_flags, "old "LPX64", new "LPX64"\n", 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: cfs_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; cfs_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. */ cfs_spin_lock(&imp->imp_lock); imp->imp_deactive = 1; cfs_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); } /* * there's no need to hold sem during disconnecting an import, * and actually it may cause deadlock in gss. */ cfs_up_write(&cli->cl_sem); rc = ptlrpc_disconnect_import(imp, 0); cfs_down_write(&cli->cl_sem); ptlrpc_invalidate_import(imp); if (imp->imp_rq_pool) { ptlrpc_free_rq_pool(imp->imp_rq_pool); imp->imp_rq_pool = NULL; } client_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; cfs_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 */ cfs_spin_lock(&exp->exp_lock); while (!cfs_list_empty(&exp->exp_outstanding_replies)) { struct ptlrpc_reply_state *rs = cfs_list_entry(exp->exp_outstanding_replies.next, struct ptlrpc_reply_state, rs_exp_list); struct ptlrpc_service *svc = rs->rs_service; cfs_spin_lock(&svc->srv_lock); cfs_list_del_init(&rs->rs_exp_list); cfs_spin_lock(&rs->rs_lock); ptlrpc_schedule_difficult_reply(rs); cfs_spin_unlock(&rs->rs_lock); cfs_spin_unlock(&svc->srv_lock); } cfs_spin_unlock(&exp->exp_lock); /* release nid stat refererence */ lprocfs_exp_cleanup(exp); 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); cfs_spin_lock(&exp->exp_lock); exp->exp_need_sync = 0; cfs_spin_unlock(&exp->exp_lock); class_export_cb_put(exp); } EXPORT_SYMBOL(target_client_add_cb); static void target_start_and_reset_recovery_timer(struct obd_device *obd, struct ptlrpc_request *req, int new_client); int target_handle_connect(struct ptlrpc_request *req) { struct obd_device *target, *targref = NULL; struct obd_export *export = NULL; struct obd_import *revimp; struct lustre_handle conn; struct lustre_handle *tmp; struct obd_uuid tgtuuid; struct obd_uuid cluuid; struct obd_uuid remote_uuid; char *str; int rc = 0; int mds_conn = 0; struct obd_connect_data *data, *tmpdata; lnet_nid_t *client_nid = NULL; ENTRY; OBD_RACE(OBD_FAIL_TGT_CONN_RACE); str = req_capsule_client_get(&req->rq_pill, &RMF_TGTUUID); 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); if (!target) target = class_name2obd(str); 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, __FUNCTION__, cfs_current()); str = req_capsule_client_get(&req->rq_pill, &RMF_CLUUID); 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(); } tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN); if (tmp == NULL) GOTO(out, rc = -EPROTO); conn = *tmp; data = req_capsule_client_get(&req->rq_pill, &RMF_CONNECT_DATA); if (!data) GOTO(out, rc = -EPROTO); rc = req_capsule_server_pack(&req->rq_pill); 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 = req_capsule_server_sized_get(&req->rq_pill, &RMF_CONNECT_DATA, 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 = cfs_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 != NULL && req->rq_peer.nid != export->exp_connection->c_peer.nid && (lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_INITIAL)) { /* in mds failover we have static uuid but nid can be * changed*/ 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 { cfs_spin_lock(&export->exp_lock); export->exp_connecting = 1; cfs_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 && cfs_atomic_read(&export->exp_rpc_count) > 0) { CWARN("%s: refuse connection from %s/%s to 0x%p/%d\n", target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid), export, cfs_atomic_read(&export->exp_refcount)); GOTO(out, rc = -EBUSY); } else if (req->rq_export != NULL && (cfs_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/%d\n", target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid), export, cfs_atomic_read(&export->exp_rpc_count) - 1); cfs_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; cfs_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 { OBD_FAIL_TIMEOUT(OBD_FAIL_TGT_DELAY_RECONNECT, 2 * obd_timeout); } if (rc < 0) { GOTO(out, rc); } CWARN("%s: connection from %s@%s %st"LPU64" exp %p cur %ld last %ld\n", target->obd_name, cluuid.uuid, libcfs_nid2str(req->rq_peer.nid), target->obd_recovering ? "recovering/" : "", data->ocd_transno, export, (long)cfs_time_current_sec(), export ? (long)export->exp_last_request_time : 0); /* 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, 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; if (export == NULL) { if (target->obd_recovering) { cfs_time_t t; t = cfs_timer_deadline(&target->obd_recovery_timer); t = cfs_time_sub(t, cfs_time_current()); CERROR("%s: denying connection for new client %s (%s): " "%d clients in recovery for "CFS_TIME_T"s\n", target->obd_name, libcfs_nid2str(req->rq_peer.nid), cluuid.uuid, cfs_atomic_read(&target-> \ obd_lock_replay_clients), cfs_duration_sec(t)); rc = -EBUSY; } else { dont_check_exports: rc = obd_connect(req->rq_svc_thread->t_env, &export, target, &cluuid, data, client_nid); if (rc == 0) conn.cookie = export->exp_handle.h_cookie; } } else { rc = obd_reconnect(req->rq_svc_thread->t_env, export, target, &cluuid, data, client_nid); if (rc == 0) /* prevous done via class_conn2export */ class_export_get(export); } 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) { tmpdata = req_capsule_server_get(&req->rq_pill, &RMF_CONNECT_DATA); //data->ocd_connect_flags &= OBD_CONNECT_SUPPORTED; *tmpdata = *data; } /* If all else goes well, this is our RPC return code. */ req->rq_status = 0; lustre_msg_set_handle(req->rq_repmsg, &conn); /* 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; cfs_spin_lock(&export->exp_lock); if (export->exp_conn_cnt >= lustre_msg_get_conn_cnt(req->rq_reqmsg)) { cfs_spin_unlock(&export->exp_lock); 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)); 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; cfs_spin_unlock(&export->exp_lock); cfs_spin_lock(&target->obd_dev_lock); cfs_list_del_init(&export->exp_obd_chain_timed); cfs_spin_unlock(&target->obd_dev_lock); } else { cfs_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) && !cfs_hlist_unhashed(&export->exp_nid_hash)) cfs_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 (cfs_hlist_unhashed(&export->exp_nid_hash)) { cfs_hash_add_unique(export->exp_obd->obd_nid_hash, &export->exp_connection->c_peer.nid, &export->exp_nid_hash); } cfs_spin_lock_bh(&target->obd_processing_task_lock); if (target->obd_recovering && !export->exp_in_recovery) { cfs_spin_lock(&export->exp_lock); export->exp_in_recovery = 1; export->exp_req_replay_needed = 1; export->exp_lock_replay_needed = 1; cfs_spin_unlock(&export->exp_lock); if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO) && (data->ocd_transno == 0)) CWARN("Connect with zero transno!\n"); if ((lustre_msg_get_op_flags(req->rq_reqmsg) & MSG_CONNECT_TRANSNO) && data->ocd_transno < target->obd_next_recovery_transno) target->obd_next_recovery_transno = data->ocd_transno; target->obd_connected_clients++; cfs_atomic_inc(&target->obd_req_replay_clients); cfs_atomic_inc(&target->obd_lock_replay_clients); if (target->obd_connected_clients == target->obd_max_recoverable_clients) cfs_waitq_signal(&target->obd_next_transno_waitq); } cfs_spin_unlock_bh(&target->obd_processing_task_lock); tmp = req_capsule_client_get(&req->rq_pill, &RMF_CONN); conn = *tmp; if (export->exp_imp_reverse != NULL) { /* destroyed import can be still referenced in ctxt */ obd_set_info_async(export, sizeof(KEY_REVIMP_UPD), KEY_REVIMP_UPD, 0, NULL, NULL); client_destroy_import(export->exp_imp_reverse); } /* for the rest part, we return -ENOTCONN in case of errors * in order to let client initialize connection again. */ revimp = export->exp_imp_reverse = class_new_import(target); if (!revimp) { CERROR("fail to alloc new reverse import.\n"); GOTO(out, rc = -ENOTCONN); } revimp->imp_connection = ptlrpc_connection_addref(export->exp_connection); 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; /* unknown versions will be caught in * ptlrpc_handle_server_req_in->lustre_unpack_msg() */ revimp->imp_msg_magic = req->rq_reqmsg->lm_magic; if ((export->exp_connect_flags & OBD_CONNECT_AT) && (revimp->imp_msg_magic != LUSTRE_MSG_MAGIC_V1)) revimp->imp_msghdr_flags |= MSGHDR_AT_SUPPORT; else revimp->imp_msghdr_flags &= ~MSGHDR_AT_SUPPORT; rc = sptlrpc_import_sec_adapt(revimp, req->rq_svc_ctx, &req->rq_flvr); if (rc) { CERROR("Failed to get sec for reverse import: %d\n", rc); export->exp_imp_reverse = NULL; class_destroy_import(revimp); } class_import_put(revimp); out: if (export) { cfs_spin_lock(&export->exp_lock); export->exp_connecting = 0; cfs_spin_unlock(&export->exp_lock); } if (targref) class_decref(targref, __FUNCTION__, cfs_current()); if (rc) req->rq_status = rc; RETURN(rc); } int target_handle_disconnect(struct ptlrpc_request *req) { int rc; ENTRY; rc = req_capsule_server_pack(&req->rq_pill); 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) client_destroy_import(exp->exp_imp_reverse); LASSERT(cfs_atomic_read(&exp->exp_locks_count) == 0); LASSERT(cfs_atomic_read(&exp->exp_rpc_count) == 0); LASSERT(cfs_atomic_read(&exp->exp_cb_count) == 0); LASSERT(cfs_atomic_read(&exp->exp_replay_count) == 0); } /* * Recovery functions */ static void target_request_copy_get(struct ptlrpc_request *req) { class_export_rpc_get(req->rq_export); LASSERT(cfs_list_empty(&req->rq_list)); CFS_INIT_LIST_HEAD(&req->rq_replay_list); /* increase refcount to keep request in queue */ LASSERT(cfs_atomic_read(&req->rq_refcount)); cfs_atomic_inc(&req->rq_refcount); /** let export know it has replays to be handled */ cfs_atomic_inc(&req->rq_export->exp_replay_count); /* 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) { LASSERT(cfs_list_empty(&req->rq_replay_list)); LASSERT(cfs_atomic_read(&req->rq_export->exp_replay_count) > 0); cfs_atomic_dec(&req->rq_export->exp_replay_count); 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 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); cfs_spin_lock(&exp->exp_lock); cfs_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 { cfs_list_add_tail(&req->rq_replay_list, &exp->exp_req_replay_queue); } cfs_spin_unlock(&exp->exp_lock); return dup; } static void target_exp_dequeue_req_replay(struct ptlrpc_request *req) { LASSERT(!cfs_list_empty(&req->rq_replay_list)); LASSERT(req->rq_export); cfs_spin_lock(&req->rq_export->exp_lock); cfs_list_del_init(&req->rq_replay_list); cfs_spin_unlock(&req->rq_export->exp_lock); } #ifdef __KERNEL__ static void target_finish_recovery(struct obd_device *obd) { ENTRY; LCONSOLE_INFO("%s: sending delayed replies to recovered clients\n", obd->obd_name); ldlm_reprocess_all_ns(obd->obd_namespace); cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (!cfs_list_empty(&obd->obd_req_replay_queue) || !cfs_list_empty(&obd->obd_lock_replay_queue) || !cfs_list_empty(&obd->obd_final_req_queue)) { CERROR("%s: Recovery queues ( %s%s%s) are not empty\n", obd->obd_name, cfs_list_empty(&obd->obd_req_replay_queue) ? "" : "req ", cfs_list_empty(&obd->obd_lock_replay_queue) ? \ "" : "lock ", cfs_list_empty(&obd->obd_final_req_queue) ? \ "" : "final "); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); LBUG(); } cfs_spin_unlock_bh(&obd->obd_processing_task_lock); obd->obd_recovery_end = cfs_time_current_sec(); /* 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); } EXIT; } static void abort_req_replay_queue(struct obd_device *obd) { struct ptlrpc_request *req, *n; cfs_list_t abort_list; CFS_INIT_LIST_HEAD(&abort_list); cfs_spin_lock_bh(&obd->obd_processing_task_lock); cfs_list_splice_init(&obd->obd_req_replay_queue, &abort_list); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list) { DEBUG_REQ(D_WARNING, req, "aborted:"); req->rq_status = -ENOTCONN; if (ptlrpc_error(req)) { DEBUG_REQ(D_ERROR, req, "failed abort_req_reply; skipping"); } target_exp_dequeue_req_replay(req); target_request_copy_put(req); } } static void abort_lock_replay_queue(struct obd_device *obd) { struct ptlrpc_request *req, *n; cfs_list_t abort_list; CFS_INIT_LIST_HEAD(&abort_list); cfs_spin_lock_bh(&obd->obd_processing_task_lock); cfs_list_splice_init(&obd->obd_lock_replay_queue, &abort_list); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); cfs_list_for_each_entry_safe(req, n, &abort_list, rq_list){ DEBUG_REQ(D_ERROR, req, "aborted:"); req->rq_status = -ENOTCONN; if (ptlrpc_error(req)) { DEBUG_REQ(D_ERROR, req, "failed abort_lock_reply; skipping"); } target_request_copy_put(req); } } #endif /* 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 ptlrpc_request *req, *n; cfs_list_t clean_list; ENTRY; CFS_INIT_LIST_HEAD(&clean_list); cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (!obd->obd_recovering) { cfs_spin_unlock_bh(&obd->obd_processing_task_lock); EXIT; return; } obd->obd_recovering = obd->obd_abort_recovery = 0; target_cancel_recovery_timer(obd); cfs_list_splice_init(&obd->obd_req_replay_queue, &clean_list); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list) { LASSERT(req->rq_reply_state == 0); target_exp_dequeue_req_replay(req); target_request_copy_put(req); } cfs_spin_lock_bh(&obd->obd_processing_task_lock); cfs_list_splice_init(&obd->obd_lock_replay_queue, &clean_list); cfs_list_splice_init(&obd->obd_final_req_queue, &clean_list); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); cfs_list_for_each_entry_safe(req, n, &clean_list, rq_list){ LASSERT(req->rq_reply_state == 0); target_request_copy_put(req); } EXIT; } /* 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; cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (!obd->obd_recovering || obd->obd_abort_recovery) { cfs_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; #ifdef CRAY_XT3 /* * If total recovery time already exceed the * obd_recovery_max_time, then CRAY XT3 will * abort the recovery */ if(obd->obd_recovery_timeout > obd->obd_recovery_max_time) obd->obd_recovery_timeout = obd->obd_recovery_max_time; #endif obd->obd_recovery_end = obd->obd_recovery_start + obd->obd_recovery_timeout; if (!cfs_timer_is_armed(&obd->obd_recovery_timer) || 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)); } cfs_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) { cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (cfs_timer_is_armed(&obd->obd_recovery_timer)) { cfs_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(); /* minimum */ obd->obd_recovery_timeout = OBD_RECOVERY_FACTOR * obd_timeout; cfs_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 extended 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, 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_add(&req->rq_rqbd->rqbd_service->srv_at_estimate, service_time); check_and_start_recovery_timer(obd); /* 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); } #ifdef __KERNEL__ /** Health checking routines */ static inline int exp_connect_healthy(struct obd_export *exp) { return (exp->exp_in_recovery); } /** if export done req_replay or has replay in queue */ static inline int exp_req_replay_healthy(struct obd_export *exp) { return (!exp->exp_req_replay_needed || cfs_atomic_read(&exp->exp_replay_count) > 0); } /** if export done lock_replay or has replay in queue */ static inline int exp_lock_replay_healthy(struct obd_export *exp) { return (!exp->exp_lock_replay_needed || cfs_atomic_read(&exp->exp_replay_count) > 0); } static inline int exp_vbr_healthy(struct obd_export *exp) { return (!exp->exp_vbr_failed); } static inline int exp_finished(struct obd_export *exp) { return (exp->exp_in_recovery && !exp->exp_lock_replay_needed); } /** Checking routines for recovery */ static int check_for_clients(struct obd_device *obd) { if (obd->obd_abort_recovery || obd->obd_recovery_expired) return 1; LASSERT(obd->obd_connected_clients <= obd->obd_max_recoverable_clients); if (obd->obd_no_conn == 0 && obd->obd_connected_clients + obd->obd_stale_clients == obd->obd_max_recoverable_clients) return 1; return 0; } static int check_for_next_transno(struct obd_device *obd) { struct ptlrpc_request *req = NULL; int wake_up = 0, connected, completed, queue_len; __u64 next_transno, req_transno; ENTRY; cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (!cfs_list_empty(&obd->obd_req_replay_queue)) { req = cfs_list_entry(obd->obd_req_replay_queue.next, struct ptlrpc_request, rq_list); req_transno = lustre_msg_get_transno(req->rq_reqmsg); } else { req_transno = 0; } connected = obd->obd_connected_clients; completed = connected - cfs_atomic_read(&obd->obd_req_replay_clients); queue_len = obd->obd_requests_queued_for_recovery; next_transno = obd->obd_next_recovery_transno; CDEBUG(D_HA, "max: %d, connected: %d, completed: %d, queue_len: %d, " "req_transno: "LPU64", next_transno: "LPU64"\n", obd->obd_max_recoverable_clients, connected, completed, queue_len, req_transno, next_transno); if (obd->obd_abort_recovery) { CDEBUG(D_HA, "waking for aborted recovery\n"); wake_up = 1; } else if (obd->obd_recovery_expired) { CDEBUG(D_HA, "waking for expired recovery\n"); wake_up = 1; } else if (cfs_atomic_read(&obd->obd_req_replay_clients) == 0) { CDEBUG(D_HA, "waking for completed recovery\n"); wake_up = 1; } else if (req_transno == next_transno) { CDEBUG(D_HA, "waking for next ("LPD64")\n", next_transno); wake_up = 1; } else if (queue_len == cfs_atomic_read(&obd->obd_req_replay_clients)) { int d_lvl = D_HA; /** handle gaps occured due to lost reply or VBR */ LASSERTF(req_transno >= next_transno, "req_transno: "LPU64", next_transno: "LPU64"\n", req_transno, next_transno); if (req_transno > obd->obd_last_committed && !obd->obd_version_recov) d_lvl = D_ERROR; CDEBUG(d_lvl, "%s: waking for gap in transno, VBR is %s (skip: " LPD64", ql: %d, comp: %d, conn: %d, next: "LPD64 ", last_committed: "LPD64")\n", obd->obd_name, obd->obd_version_recov ? "ON" : "OFF", next_transno, queue_len, completed, connected, req_transno, obd->obd_last_committed); obd->obd_next_recovery_transno = req_transno; wake_up = 1; } else if (OBD_FAIL_CHECK(OBD_FAIL_MDS_RECOVERY_ACCEPTS_GAPS)) { CDEBUG(D_HA, "accepting transno gaps is explicitly allowed" " by fail_lock, waking up ("LPD64")\n", next_transno); obd->obd_next_recovery_transno = req_transno; wake_up = 1; } cfs_spin_unlock_bh(&obd->obd_processing_task_lock); return wake_up; } static int check_for_next_lock(struct obd_device *obd) { int wake_up = 0; cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (!cfs_list_empty(&obd->obd_lock_replay_queue)) { CDEBUG(D_HA, "waking for next lock\n"); wake_up = 1; } else if (cfs_atomic_read(&obd->obd_lock_replay_clients) == 0) { CDEBUG(D_HA, "waking for completed lock replay\n"); wake_up = 1; } else if (obd->obd_abort_recovery) { CDEBUG(D_HA, "waking for aborted recovery\n"); wake_up = 1; } else if (obd->obd_recovery_expired) { CDEBUG(D_HA, "waking for expired recovery\n"); wake_up = 1; } cfs_spin_unlock_bh(&obd->obd_processing_task_lock); return wake_up; } /** * wait for recovery events, * check its status with help of check_routine * evict dead clients via health_check */ static int target_recovery_overseer(struct obd_device *obd, int (*check_routine)(struct obd_device *), int (*health_check)(struct obd_export *)) { int abort = 0, expired = 1; do { cfs_wait_event(obd->obd_next_transno_waitq, check_routine(obd)); cfs_spin_lock_bh(&obd->obd_processing_task_lock); abort = obd->obd_abort_recovery; expired = obd->obd_recovery_expired; obd->obd_recovery_expired = 0; cfs_spin_unlock_bh(&obd->obd_processing_task_lock); if (abort) { CWARN("recovery is aborted, evict exports in recovery\n"); /** evict exports which didn't finish recovery yet */ class_disconnect_stale_exports(obd, exp_finished); } else if (expired) { /** If some clients died being recovered, evict them */ CDEBUG(D_WARNING, "recovery is timed out, evict stale exports\n"); /** evict cexports with no replay in queue, they are stalled */ class_disconnect_stale_exports(obd, health_check); /** continue with VBR */ cfs_spin_lock_bh(&obd->obd_processing_task_lock); obd->obd_version_recov = 1; cfs_spin_unlock_bh(&obd->obd_processing_task_lock); /** * reset timer, recovery will proceed with versions now, * timeout is set just to handle reconnection delays */ reset_recovery_timer(obd, RECONNECT_DELAY_MAX, 1); /** Wait for recovery events again, after evicting bad clients */ } } while (!abort && expired); return abort; } static struct ptlrpc_request *target_next_replay_req(struct obd_device *obd) { struct ptlrpc_request *req = NULL; ENTRY; CDEBUG(D_HA, "Waiting for transno "LPD64"\n", obd->obd_next_recovery_transno); if (target_recovery_overseer(obd, check_for_next_transno, exp_req_replay_healthy)) { abort_req_replay_queue(obd); abort_lock_replay_queue(obd); } cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (!cfs_list_empty(&obd->obd_req_replay_queue)) { req = cfs_list_entry(obd->obd_req_replay_queue.next, struct ptlrpc_request, rq_list); cfs_list_del_init(&req->rq_list); obd->obd_requests_queued_for_recovery--; cfs_spin_unlock_bh(&obd->obd_processing_task_lock); } else { cfs_spin_unlock_bh(&obd->obd_processing_task_lock); LASSERT(cfs_list_empty(&obd->obd_req_replay_queue)); LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) == 0); /** evict exports failed VBR */ class_disconnect_stale_exports(obd, exp_vbr_healthy); } RETURN(req); } static struct ptlrpc_request *target_next_replay_lock(struct obd_device *obd) { struct ptlrpc_request *req = NULL; CDEBUG(D_HA, "Waiting for lock\n"); if (target_recovery_overseer(obd, check_for_next_lock, exp_lock_replay_healthy)) abort_lock_replay_queue(obd); cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (!cfs_list_empty(&obd->obd_lock_replay_queue)) { req = cfs_list_entry(obd->obd_lock_replay_queue.next, struct ptlrpc_request, rq_list); cfs_list_del_init(&req->rq_list); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); } else { cfs_spin_unlock_bh(&obd->obd_processing_task_lock); LASSERT(cfs_list_empty(&obd->obd_lock_replay_queue)); LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) == 0); /** evict exports failed VBR */ class_disconnect_stale_exports(obd, exp_vbr_healthy); } return req; } static struct ptlrpc_request *target_next_final_ping(struct obd_device *obd) { struct ptlrpc_request *req = NULL; cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (!cfs_list_empty(&obd->obd_final_req_queue)) { req = cfs_list_entry(obd->obd_final_req_queue.next, struct ptlrpc_request, rq_list); cfs_list_del_init(&req->rq_list); if (req->rq_export->exp_in_recovery) { cfs_spin_lock(&req->rq_export->exp_lock); req->rq_export->exp_in_recovery = 0; cfs_spin_unlock(&req->rq_export->exp_lock); } } cfs_spin_unlock_bh(&obd->obd_processing_task_lock); return req; } static int handle_recovery_req(struct ptlrpc_thread *thread, struct ptlrpc_request *req, svc_handler_t handler) { int rc; ENTRY; rc = lu_context_init(&req->rq_recov_session, LCT_SESSION); if (rc) { CERROR("Failure to initialize session: %d\n", rc); GOTO(reqcopy_put, rc); } /** * export can be evicted during recovery, no need to handle replays for * it after that, discard such request silently */ if (req->rq_export->exp_disconnected) GOTO(reqcopy_put, rc); req->rq_recov_session.lc_thread = thread; lu_context_enter(&req->rq_recov_session); req->rq_svc_thread = thread; req->rq_svc_thread->t_env->le_ses = &req->rq_recov_session; /* thread context */ lu_context_enter(&thread->t_env->le_ctx); (void)handler(req); lu_context_exit(&thread->t_env->le_ctx); lu_context_exit(&req->rq_recov_session); lu_context_fini(&req->rq_recov_session); /* don't reset timer for final stage */ if (!exp_finished(req->rq_export)) { /** * Add request timeout to the recovery time so next request from * this client may come in recovery time */ reset_recovery_timer(class_exp2obd(req->rq_export), AT_OFF ? obd_timeout : lustre_msg_get_timeout(req->rq_reqmsg), 1); } reqcopy_put: RETURN(rc); } static int target_recovery_thread(void *arg) { struct lu_target *lut = arg; struct obd_device *obd = lut->lut_obd; struct ptlrpc_request *req; struct target_recovery_data *trd = &obd->obd_recovery_data; unsigned long delta; unsigned long flags; struct lu_env env; struct ptlrpc_thread fake_svc_thread, *thread = &fake_svc_thread; int rc = 0; ENTRY; cfs_daemonize("tgt_recov"); SIGNAL_MASK_LOCK(current, flags); sigfillset(¤t->blocked); RECALC_SIGPENDING; SIGNAL_MASK_UNLOCK(current, flags); rc = lu_context_init(&env.le_ctx, LCT_MD_THREAD); if (rc) RETURN(rc); thread->t_env = &env; env.le_ctx.lc_thread = thread; CERROR("%s: started recovery thread pid %d\n", obd->obd_name, cfs_curproc_pid()); trd->trd_processing_task = cfs_curproc_pid(); obd->obd_recovering = 1; cfs_complete(&trd->trd_starting); /* first of all, we have to know the first transno to replay */ if (target_recovery_overseer(obd, check_for_clients, exp_connect_healthy)) { abort_req_replay_queue(obd); abort_lock_replay_queue(obd); } /* next stage: replay requests */ delta = jiffies; obd->obd_req_replaying = 1; CDEBUG(D_INFO, "1: request replay stage - %d clients from t"LPU64"\n", cfs_atomic_read(&obd->obd_req_replay_clients), obd->obd_next_recovery_transno); while ((req = target_next_replay_req(obd))) { LASSERT(trd->trd_processing_task == cfs_curproc_pid()); DEBUG_REQ(D_HA, req, "processing t"LPD64" from %s", lustre_msg_get_transno(req->rq_reqmsg), libcfs_nid2str(req->rq_peer.nid)); handle_recovery_req(thread, req, trd->trd_recovery_handler); /** * bz18031: increase next_recovery_transno before * target_request_copy_put() will drop exp_rpc reference */ cfs_spin_lock_bh(&obd->obd_processing_task_lock); obd->obd_next_recovery_transno++; cfs_spin_unlock_bh(&obd->obd_processing_task_lock); target_exp_dequeue_req_replay(req); target_request_copy_put(req); obd->obd_replayed_requests++; } /** * The second stage: replay locks */ CDEBUG(D_INFO, "2: lock replay stage - %d clients\n", cfs_atomic_read(&obd->obd_lock_replay_clients)); while ((req = target_next_replay_lock(obd))) { LASSERT(trd->trd_processing_task == cfs_curproc_pid()); DEBUG_REQ(D_HA, req, "processing lock from %s: ", libcfs_nid2str(req->rq_peer.nid)); handle_recovery_req(thread, req, trd->trd_recovery_handler); target_request_copy_put(req); obd->obd_replayed_locks++; } /** * The third stage: reply on final pings, at this moment all clients * must have request in final queue */ CDEBUG(D_INFO, "3: final stage - process recovery completion pings\n"); /** Update server last boot epoch */ lut_boot_epoch_update(lut); /* We drop recoverying flag to forward all new requests * to regular mds_handle() since now */ cfs_spin_lock_bh(&obd->obd_processing_task_lock); obd->obd_recovering = obd->obd_abort_recovery = 0; target_cancel_recovery_timer(obd); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); while ((req = target_next_final_ping(obd))) { LASSERT(trd->trd_processing_task == cfs_curproc_pid()); DEBUG_REQ(D_HA, req, "processing final ping from %s: ", libcfs_nid2str(req->rq_peer.nid)); handle_recovery_req(thread, req, trd->trd_recovery_handler); target_request_copy_put(req); } delta = (jiffies - delta) / CFS_HZ; CDEBUG(D_INFO,"4: recovery completed in %lus - %d/%d reqs/locks\n", delta, obd->obd_replayed_requests, obd->obd_replayed_locks); if (delta > obd_timeout * OBD_RECOVERY_FACTOR) { CWARN("too long recovery - read logs\n"); libcfs_debug_dumplog(); } target_finish_recovery(obd); lu_context_fini(&env.le_ctx); trd->trd_processing_task = 0; cfs_complete(&trd->trd_finishing); RETURN(rc); } static int target_start_recovery_thread(struct lu_target *lut, svc_handler_t handler) { struct obd_device *obd = lut->lut_obd; int rc = 0; struct target_recovery_data *trd = &obd->obd_recovery_data; memset(trd, 0, sizeof(*trd)); cfs_init_completion(&trd->trd_starting); cfs_init_completion(&trd->trd_finishing); trd->trd_recovery_handler = handler; if (cfs_kernel_thread(target_recovery_thread, lut, 0) > 0) { cfs_wait_for_completion(&trd->trd_starting); LASSERT(obd->obd_recovering != 0); } else rc = -ECHILD; return rc; } void target_stop_recovery_thread(struct obd_device *obd) { cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (obd->obd_recovery_data.trd_processing_task > 0) { struct target_recovery_data *trd = &obd->obd_recovery_data; /** recovery can be done but postrecovery is not yet */ if (obd->obd_recovering) { CERROR("%s: Aborting recovery\n", obd->obd_name); obd->obd_abort_recovery = 1; cfs_waitq_signal(&obd->obd_next_transno_waitq); } cfs_spin_unlock_bh(&obd->obd_processing_task_lock); cfs_wait_for_completion(&trd->trd_finishing); } else { cfs_spin_unlock_bh(&obd->obd_processing_task_lock); } } void target_recovery_fini(struct obd_device *obd) { class_disconnect_exports(obd); target_stop_recovery_thread(obd); target_cleanup_recovery(obd); } EXPORT_SYMBOL(target_recovery_fini); static void target_recovery_expired(unsigned long castmeharder) { struct obd_device *obd = (struct obd_device *)castmeharder; CDEBUG(D_HA, "%s: recovery timed out; %d clients are still in recovery" " after %lds (%d clients connected)\n", obd->obd_name, cfs_atomic_read(&obd->obd_lock_replay_clients), cfs_time_current_sec()- obd->obd_recovery_start, obd->obd_connected_clients); cfs_spin_lock_bh(&obd->obd_processing_task_lock); obd->obd_recovery_expired = 1; cfs_waitq_signal(&obd->obd_next_transno_waitq); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); } void target_recovery_init(struct lu_target *lut, svc_handler_t handler) { struct obd_device *obd = lut->lut_obd; if (obd->obd_max_recoverable_clients == 0) { /** Update server last boot epoch */ lut_boot_epoch_update(lut); return; } CWARN("RECOVERY: service %s, %d recoverable clients, " "last_transno "LPU64"\n", obd->obd_name, obd->obd_max_recoverable_clients, obd->obd_last_committed); LASSERT(obd->obd_stopping == 0); obd->obd_next_recovery_transno = obd->obd_last_committed + 1; obd->obd_recovery_start = 0; obd->obd_recovery_end = 0; obd->obd_recovery_timeout = OBD_RECOVERY_FACTOR * obd_timeout; /* bz13079: this should be set to desired value for ost but not for mds */ obd->obd_recovery_max_time = OBD_RECOVERY_MAX_TIME; cfs_timer_init(&obd->obd_recovery_timer, target_recovery_expired, obd); target_start_recovery_thread(lut, handler); } EXPORT_SYMBOL(target_recovery_init); #endif static int target_process_req_flags(struct obd_device *obd, struct ptlrpc_request *req) { struct obd_export *exp = req->rq_export; LASSERT(exp != NULL); if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) { /* client declares he's ready to replay locks */ cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (exp->exp_req_replay_needed) { LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients) > 0); cfs_spin_lock(&exp->exp_lock); exp->exp_req_replay_needed = 0; cfs_spin_unlock(&exp->exp_lock); cfs_atomic_dec(&obd->obd_req_replay_clients); } cfs_spin_unlock_bh(&obd->obd_processing_task_lock); } if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) { /* client declares he's ready to complete recovery * so, we put the request on th final queue */ cfs_spin_lock_bh(&obd->obd_processing_task_lock); if (exp->exp_lock_replay_needed) { LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients) > 0); cfs_spin_lock(&exp->exp_lock); exp->exp_lock_replay_needed = 0; cfs_spin_unlock(&exp->exp_lock); cfs_atomic_dec(&obd->obd_lock_replay_clients); } cfs_spin_unlock_bh(&obd->obd_processing_task_lock); } return 0; } int target_queue_recovery_request(struct ptlrpc_request *req, struct obd_device *obd) { cfs_list_t *tmp; int inserted = 0; __u64 transno = lustre_msg_get_transno(req->rq_reqmsg); ENTRY; if (obd->obd_recovery_data.trd_processing_task == cfs_curproc_pid()) { /* Processing the queue right now, don't re-add. */ RETURN(1); } target_process_req_flags(obd, req); if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LOCK_REPLAY_DONE) { /* client declares he's ready to complete recovery * so, we put the request on th final queue */ target_request_copy_get(req); DEBUG_REQ(D_HA, req, "queue final req"); cfs_spin_lock_bh(&obd->obd_processing_task_lock); cfs_waitq_signal(&obd->obd_next_transno_waitq); if (obd->obd_recovering) { cfs_list_add_tail(&req->rq_list, &obd->obd_final_req_queue); } else { cfs_spin_unlock_bh(&obd->obd_processing_task_lock); target_request_copy_put(req); RETURN(obd->obd_stopping ? -ENOTCONN : 1); } cfs_spin_unlock_bh(&obd->obd_processing_task_lock); RETURN(0); } if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REQ_REPLAY_DONE) { /* client declares he's ready to replay locks */ target_request_copy_get(req); DEBUG_REQ(D_HA, req, "queue lock replay req"); cfs_spin_lock_bh(&obd->obd_processing_task_lock); cfs_waitq_signal(&obd->obd_next_transno_waitq); LASSERT(obd->obd_recovering); /* usually due to recovery abort */ if (!req->rq_export->exp_in_recovery) { cfs_spin_unlock_bh(&obd->obd_processing_task_lock); target_request_copy_put(req); RETURN(-ENOTCONN); } LASSERT(req->rq_export->exp_lock_replay_needed); cfs_list_add_tail(&req->rq_list, &obd->obd_lock_replay_queue); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); RETURN(0); } /* 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); } cfs_spin_lock_bh(&obd->obd_processing_task_lock); /* 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. */ CWARN("Next recovery transno: "LPU64", current: "LPU64", replaying: %i\n", obd->obd_next_recovery_transno, transno, obd->obd_req_replaying); if (transno < obd->obd_next_recovery_transno && obd->obd_req_replaying) { /* Processing the queue right now, don't re-add. */ LASSERT(cfs_list_empty(&req->rq_list)); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); RETURN(1); } cfs_spin_unlock_bh(&obd->obd_processing_task_lock); if (OBD_FAIL_CHECK(OBD_FAIL_TGT_REPLAY_DROP)) RETURN(0); target_request_copy_get(req); cfs_spin_lock_bh(&obd->obd_processing_task_lock); LASSERT(obd->obd_recovering); if (!req->rq_export->exp_in_recovery) { cfs_spin_unlock_bh(&obd->obd_processing_task_lock); target_request_copy_put(req); RETURN(-ENOTCONN); } LASSERT(req->rq_export->exp_req_replay_needed); if (target_exp_enqueue_req_replay(req)) { cfs_spin_unlock_bh(&obd->obd_processing_task_lock); DEBUG_REQ(D_ERROR, req, "dropping resent queued req"); target_request_copy_put(req); RETURN(0); } /* XXX O(n^2) */ cfs_list_for_each(tmp, &obd->obd_req_replay_queue) { struct ptlrpc_request *reqiter = cfs_list_entry(tmp, struct ptlrpc_request, rq_list); if (lustre_msg_get_transno(reqiter->rq_reqmsg) > transno) { cfs_list_add_tail(&req->rq_list, &reqiter->rq_list); inserted = 1; break; } if (unlikely(lustre_msg_get_transno(reqiter->rq_reqmsg) == transno)) { DEBUG_REQ(D_ERROR, req, "dropping replay: transno " "has been claimed by another client"); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); target_exp_dequeue_req_replay(req); target_request_copy_put(req); RETURN(0); } } if (!inserted) cfs_list_add_tail(&req->rq_list, &obd->obd_req_replay_queue); obd->obd_requests_queued_for_recovery++; cfs_waitq_signal(&obd->obd_next_transno_waitq); cfs_spin_unlock_bh(&obd->obd_processing_task_lock); RETURN(0); } /** * Packs current SLV and Limit into \a req. */ 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; cfs_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); cfs_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_ORSET(fail_id & ~OBD_FAIL_ONCE, OBD_FAIL_ONCE)) { DEBUG_REQ(D_ERROR, req, "dropping reply"); return (-ECOMM); } if (unlikely(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; ENTRY; if (req->rq_no_reply) { EXIT; return; } 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); EXIT; 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 (cfs_list_empty(&rs->rs_obd_list)); LASSERT (cfs_list_empty(&rs->rs_exp_list)); exp = class_export_get (req->rq_export); obd = exp->exp_obd; /* disable reply scheduling 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; rs->rs_opc = lustre_msg_get_opc(rs->rs_msg); cfs_spin_lock(&exp->exp_uncommitted_replies_lock); CDEBUG(D_NET, "rs transno = "LPU64", last committed = "LPU64"\n", rs->rs_transno, exp->exp_last_committed); if (rs->rs_transno > exp->exp_last_committed) { /* not committed already */ cfs_list_add_tail(&rs->rs_obd_list, &exp->exp_uncommitted_replies); } cfs_spin_unlock (&exp->exp_uncommitted_replies_lock); cfs_spin_lock(&exp->exp_lock); cfs_list_add_tail(&rs->rs_exp_list, &exp->exp_outstanding_replies); cfs_spin_unlock(&exp->exp_lock); netrc = target_send_reply_msg (req, rc, fail_id); cfs_spin_lock(&svc->srv_lock); cfs_atomic_inc(&svc->srv_n_difficult_replies); if (netrc != 0) { /* error sending: reply is off the net. Also we need +1 * reply ref until ptlrpc_handle_rs() 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); cfs_atomic_inc (&svc->srv_outstanding_replies); } cfs_spin_lock(&rs->rs_lock); if (rs->rs_transno <= exp->exp_last_committed || (!rs->rs_on_net && !rs->rs_no_ack) || cfs_list_empty(&rs->rs_exp_list) || /* completed already */ cfs_list_empty(&rs->rs_obd_list)) { CDEBUG(D_HA, "Schedule reply immediately\n"); ptlrpc_dispatch_difficult_reply(rs); } else { cfs_list_add (&rs->rs_list, &svc->srv_active_replies); rs->rs_scheduled = 0; /* allow notifier to schedule */ } cfs_spin_unlock(&rs->rs_lock); cfs_spin_unlock(&svc->srv_lock); EXIT; } int target_handle_ping(struct ptlrpc_request *req) { obd_ping(req->rq_export); return req_capsule_server_pack(&req->rq_pill); } 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 "LPU64", transno "LPU64", xid "LPU64"\n", exp->exp_last_committed, req->rq_transno, 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 = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL); if (oqctl == NULL) { CERROR("Can't unpack obd_quotactl\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 obd_device_target *obt; struct lustre_quota_ctxt *qctxt; struct qunit_data *qdata = NULL; int rc = 0; ENTRY; if (OBD_FAIL_CHECK(OBD_FAIL_MDS_DROP_QUOTA_REQ)) RETURN(rc); rc = req_capsule_server_pack(&req->rq_pill); if (rc) { CERROR("packing reply failed!: rc = %d\n", rc); RETURN(rc); } LASSERT(req->rq_export); qdata = quota_get_qdata(req, QUOTA_REQUEST, QUOTA_EXPORT); if (IS_ERR(qdata)) { rc = PTR_ERR(qdata); CDEBUG(D_ERROR, "Can't unpack qunit_data(rc: %d)\n", rc); req->rq_status = 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(out, rc); } obt = &master_obd->u.obt; qctxt = &obt->obt_qctxt; if (!qctxt->lqc_setup || !qctxt->lqc_valid) { /* 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; GOTO(out, rc); } cfs_down_read(&obt->obt_rwsem); if (qctxt->lqc_lqs_hash == NULL) { cfs_up_read(&obt->obt_rwsem); /* 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_ctxt is not ready yet, return " "-EAGAIN\n"); req->rq_status = -EAGAIN; GOTO(out, rc); } LASSERT(qctxt->lqc_handler); rc = qctxt->lqc_handler(master_obd, qdata, lustre_msg_get_opc(req->rq_reqmsg)); cfs_up_read(&obt->obt_rwsem); if (rc && rc != -EDQUOT) CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR, "dqacq/dqrel failed! (rc:%d)\n", rc); req->rq_status = rc; rc = quota_copy_qdata(req, qdata, QUOTA_REPLY, QUOTA_EXPORT); if (rc < 0) { CERROR("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); EXIT; out: if (master_obd) obd_unpin_observer(lov_obd); if (lov_obd) obd_unpin_observer(obd); rc = ptlrpc_reply(req); return rc; #else return 0; #endif /* !__KERNEL__ */ } #endif /* HAVE_QUOTA_SUPPORT */ /* Send a remote set_info_async. * This may go from client to server or server to client */ int target_set_info_rpc(struct obd_import *imp, int opcode, obd_count keylen, void *key, obd_count vallen, void *val, struct ptlrpc_request_set *set) { struct ptlrpc_request *req; char *tmp; int rc; ENTRY; req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO); if (req == NULL) RETURN(-ENOMEM); req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY, RCL_CLIENT, keylen); req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL, RCL_CLIENT, vallen); rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, opcode); if (rc) { ptlrpc_request_free(req); RETURN(rc); } tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY); memcpy(tmp, key, keylen); tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL); memcpy(tmp, val, vallen); ptlrpc_request_set_replen(req); if (set) { ptlrpc_set_add_req(set, req); ptlrpc_check_set(NULL, set); } else { rc = ptlrpc_queue_wait(req); ptlrpc_req_finished(req); } RETURN(rc); } EXPORT_SYMBOL(target_set_info_rpc); 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, [LCK_COS] LCK_COMPAT_COS, }; /** * Rather arbitrary mapping from LDLM error codes to errno values. This should * not escape to the user level. */ int ldlm_error2errno(ldlm_error_t error) { int result; switch (error) { case ELDLM_OK: result = 0; break; case ELDLM_LOCK_CHANGED: result = -ESTALE; break; case ELDLM_LOCK_ABORTED: result = -ENAVAIL; break; case ELDLM_LOCK_REPLACED: result = -ESRCH; break; case ELDLM_NO_LOCK_DATA: result = -ENOENT; break; case ELDLM_NAMESPACE_EXISTS: result = -EEXIST; break; case ELDLM_BAD_NAMESPACE: result = -EBADF; break; default: if (((int)error) < 0) /* cast to signed type */ result = error; /* as ldlm_error_t can be unsigned */ else { CERROR("Invalid DLM result code: %i\n", error); result = -EPROTO; } } return result; } EXPORT_SYMBOL(ldlm_error2errno); /** * Dual to ldlm_error2errno(): maps errno values back to ldlm_error_t. */ ldlm_error_t ldlm_errno2error(int err_no) { int error; switch (err_no) { case 0: error = ELDLM_OK; break; case -ESTALE: error = ELDLM_LOCK_CHANGED; break; case -ENAVAIL: error = ELDLM_LOCK_ABORTED; break; case -ESRCH: error = ELDLM_LOCK_REPLACED; break; case -ENOENT: error = ELDLM_NO_LOCK_DATA; break; case -EEXIST: error = ELDLM_NAMESPACE_EXISTS; break; case -EBADF: error = ELDLM_BAD_NAMESPACE; break; default: error = err_no; } return error; } EXPORT_SYMBOL(ldlm_errno2error); #if LUSTRE_TRACKS_LOCK_EXP_REFS void ldlm_dump_export_locks(struct obd_export *exp) { cfs_spin_lock(&exp->exp_locks_list_guard); if (!cfs_list_empty(&exp->exp_locks_list)) { struct ldlm_lock *lock; CERROR("dumping locks for export %p," "ignore if the unmount doesn't hang\n", exp); cfs_list_for_each_entry(lock, &exp->exp_locks_list, l_exp_refs_link) ldlm_lock_dump(D_ERROR, lock, 0); } cfs_spin_unlock(&exp->exp_locks_list_guard); } #endif