| /* |
| * 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. |
| * |
| * Copyright (c) 2010, 2012, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| */ |
| |
| /** |
| * This file deals with various client/target related logic including recovery. |
| * |
| * TODO: This code more logically belongs in the ptlrpc module than in ldlm and |
| * should be moved. |
| */ |
| |
| #define DEBUG_SUBSYSTEM S_LDLM |
| |
| # include <linux/libcfs/libcfs.h> |
| #include <obd.h> |
| #include <obd_class.h> |
| #include <lustre_dlm.h> |
| #include <lustre_net.h> |
| #include <lustre_sec.h> |
| #include "ldlm_internal.h" |
| |
| /* @priority: If non-zero, move the selected connection to the list head. |
| * @create: If zero, only search in existing 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); |
| } |
| } |
| /* No existing import connection found for \a uuid. */ |
| 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); |
| } |
| EXPORT_SYMBOL(client_import_add_conn); |
| |
| 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); |
| |
| 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); |
| } |
| EXPORT_SYMBOL(client_import_del_conn); |
| |
| /** |
| * Find conn UUID by peer NID. \a peer is a server NID. This function is used |
| * to find a conn uuid of \a imp which can reach \a peer. |
| */ |
| int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer, |
| struct obd_uuid *uuid) |
| { |
| struct obd_import_conn *conn; |
| int rc = -ENOENT; |
| ENTRY; |
| |
| spin_lock(&imp->imp_lock); |
| list_for_each_entry(conn, &imp->imp_conn_list, oic_item) { |
| /* Check if conn UUID does have this peer NID. */ |
| if (class_check_uuid(&conn->oic_uuid, peer)) { |
| *uuid = conn->oic_uuid; |
| rc = 0; |
| break; |
| } |
| } |
| spin_unlock(&imp->imp_lock); |
| RETURN(rc); |
| } |
| EXPORT_SYMBOL(client_import_find_conn); |
| |
| void client_destroy_import(struct obd_import *imp) |
| { |
| /* Drop security policy instance after all RPCs have 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); |
| } |
| EXPORT_SYMBOL(client_destroy_import); |
| |
| /** |
| * Check whether or not the OSC is on MDT. |
| * In the config log, |
| * osc on MDT |
| * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID |
| * osc on client |
| * setup 0:{fsname}-OSTxxxx-osc 1:lustre-OST0000_UUID 2:NID |
| * |
| **/ |
| static int osc_on_mdt(char *obdname) |
| { |
| char *ptr; |
| |
| ptr = strrchr(obdname, '-'); |
| if (ptr == NULL) |
| return 0; |
| |
| if (strncmp(ptr + 1, "MDT", 3) == 0) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* 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; |
| ldlm_ns_type_t ns_type = LDLM_NS_TYPE_UNKNOWN; |
| int rc; |
| char *cli_name = lustre_cfg_buf(lcfg, 0); |
| 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) || |
| (!(strcmp(name, LUSTRE_OSP_NAME)) && |
| (is_osp_on_mdt(cli_name) && |
| strstr(lustre_cfg_buf(lcfg, 1), "OST") != NULL))) { |
| /* OSC or OSP_on_MDT for OSTs */ |
| 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; |
| ns_type = LDLM_NS_TYPE_OSC; |
| } else if (!strcmp(name, LUSTRE_MDC_NAME) || |
| !strcmp(name, LUSTRE_LWP_NAME) || |
| (!strcmp(name, LUSTRE_OSP_NAME) && |
| (is_osp_on_mdt(cli_name) && |
| strstr(lustre_cfg_buf(lcfg, 1), "OST") == NULL))) { |
| /* MDC or OSP_on_MDT for other MDTs */ |
| 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; |
| ns_type = LDLM_NS_TYPE_MDC; |
| } 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; |
| ns_type = LDLM_NS_TYPE_MGC; |
| } 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 >> PAGE_CACHE_SHIFT > num_physpages / 8) |
| cli->cl_dirty_max = num_physpages << (PAGE_CACHE_SHIFT - 3); |
| INIT_LIST_HEAD(&cli->cl_cache_waiters); |
| INIT_LIST_HEAD(&cli->cl_loi_ready_list); |
| INIT_LIST_HEAD(&cli->cl_loi_hp_ready_list); |
| INIT_LIST_HEAD(&cli->cl_loi_write_list); |
| INIT_LIST_HEAD(&cli->cl_loi_read_list); |
| client_obd_list_lock_init(&cli->cl_loi_list_lock); |
| atomic_set(&cli->cl_pending_w_pages, 0); |
| atomic_set(&cli->cl_pending_r_pages, 0); |
| cli->cl_r_in_flight = 0; |
| cli->cl_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); |
| |
| /* lru for osc. */ |
| INIT_LIST_HEAD(&cli->cl_lru_osc); |
| atomic_set(&cli->cl_lru_shrinkers, 0); |
| atomic_set(&cli->cl_lru_busy, 0); |
| atomic_set(&cli->cl_lru_in_list, 0); |
| INIT_LIST_HEAD(&cli->cl_lru_list); |
| client_obd_list_lock_init(&cli->cl_lru_list_lock); |
| |
| init_waitqueue_head(&cli->cl_destroy_waitq); |
| atomic_set(&cli->cl_destroy_in_flight, 0); |
| /* 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; |
| atomic_set(&cli->cl_resends, OSC_DEFAULT_RESENDS); |
| |
| /* This value may be reduced at connect time in |
| * ptlrpc_connect_interpret() . We initialize it to only |
| * 1MB until we know what the performance looks like. |
| * In the future this should likely be increased. LU-1431 */ |
| cli->cl_max_pages_per_rpc = min_t(int, PTLRPC_MAX_BRW_PAGES, |
| LNET_MTU >> PAGE_CACHE_SHIFT); |
| |
| if (!strcmp(name, LUSTRE_MDC_NAME)) { |
| cli->cl_max_rpcs_in_flight = MDC_MAX_RIF_DEFAULT; |
| } else if (num_physpages >> (20 - PAGE_CACHE_SHIFT) <= 128 /* MB */) { |
| cli->cl_max_rpcs_in_flight = 2; |
| } else if (num_physpages >> (20 - PAGE_CACHE_SHIFT) <= 256 /* MB */) { |
| cli->cl_max_rpcs_in_flight = 3; |
| } else if (num_physpages >> (20 - PAGE_CACHE_SHIFT) <= 512 /* MB */) { |
| cli->cl_max_rpcs_in_flight = 4; |
| } else { |
| if (osc_on_mdt(obddev->obd_name)) |
| cli->cl_max_rpcs_in_flight = MDS_OSC_MAX_RIF_DEFAULT; |
| 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; |
| 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, |
| ns_type); |
| 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); |
| |
| } |
| EXPORT_SYMBOL(client_obd_setup); |
| |
| int client_obd_cleanup(struct obd_device *obddev) |
| { |
| ENTRY; |
| |
| ldlm_namespace_free_post(obddev->obd_namespace); |
| obddev->obd_namespace = NULL; |
| |
| LASSERT(obddev->u.cli.cl_import == NULL); |
| |
| ldlm_put_ref(); |
| RETURN(0); |
| } |
| EXPORT_SYMBOL(client_obd_cleanup); |
| |
| /* ->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; |
| 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); |
| 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: |
| up_write(&cli->cl_sem); |
| |
| return rc; |
| } |
| EXPORT_SYMBOL(client_connect_import); |
| |
| 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 ? LCF_LOCAL : 0, NULL); |
| ldlm_namespace_free_prior(obd->obd_namespace, imp, obd->obd_force); |
| } |
| |
| /* There's no need to hold sem while disconnecting an import, |
| * and it may actually cause deadlock in GSS. */ |
| up_write(&cli->cl_sem); |
| rc = ptlrpc_disconnect_import(imp, 0); |
| down_write(&cli->cl_sem); |
| |
| ptlrpc_invalidate_import(imp); |
| |
| 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); |
| } |
| EXPORT_SYMBOL(client_disconnect_export); |
| |
| |
| /** |
| * 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 at 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); |
| } |
| EXPORT_SYMBOL(target_pack_pool_reply); |
| |
| 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_NET, 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) |
| { |
| struct ptlrpc_service_part *svcpt; |
| int netrc; |
| struct ptlrpc_reply_state *rs; |
| struct obd_export *exp; |
| ENTRY; |
| |
| if (req->rq_no_reply) { |
| EXIT; |
| return; |
| } |
| |
| svcpt = req->rq_rqbd->rqbd_svcpt; |
| 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_svcpt == svcpt); |
| |
| /* "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); |
| |
| /* 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(req->rq_reqmsg); |
| |
| 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 */ |
| 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(&svcpt->scp_rep_lock); |
| |
| atomic_inc(&svcpt->scp_nreps_difficult); |
| |
| 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); |
| } |
| |
| spin_lock(&rs->rs_lock); |
| if (rs->rs_transno <= exp->exp_last_committed || |
| (!rs->rs_on_net && !rs->rs_no_ack) || |
| list_empty(&rs->rs_exp_list) || /* completed already */ |
| list_empty(&rs->rs_obd_list)) { |
| CDEBUG(D_HA, "Schedule reply immediately\n"); |
| ptlrpc_dispatch_difficult_reply(rs); |
| } else { |
| list_add(&rs->rs_list, &svcpt->scp_rep_active); |
| rs->rs_scheduled = 0; /* allow notifier to schedule */ |
| } |
| spin_unlock(&rs->rs_lock); |
| spin_unlock(&svcpt->scp_rep_lock); |
| EXIT; |
| } |
| EXPORT_SYMBOL(target_send_reply); |
| |
| 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: %d\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) |
| { |
| spin_lock(&exp->exp_locks_list_guard); |
| if (!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); |
| list_for_each_entry(lock, &exp->exp_locks_list, |
| l_exp_refs_link) |
| LDLM_ERROR(lock, "lock:"); |
| } |
| spin_unlock(&exp->exp_locks_list_guard); |
| } |
| #endif |