1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
39 #define DEBUG_SUBSYSTEM S_RPC
42 # include <liblustre.h>
45 #include <obd_support.h>
46 #include <obd_class.h>
47 #include <lustre_lib.h>
48 #include <lustre_ha.h>
49 #include <lustre_net.h>
50 #include <lprocfs_status.h>
54 struct uuid_nid_data {
56 struct obd_uuid un_uuid;
58 lnet_nid_t un_nids[NIDS_MAX];
61 /* FIXME: This should probably become more elegant than a global linked list */
62 static cfs_list_t g_uuid_list;
63 static cfs_spinlock_t g_uuid_lock;
65 void class_init_uuidlist(void)
67 CFS_INIT_LIST_HEAD(&g_uuid_list);
68 cfs_spin_lock_init(&g_uuid_lock);
71 void class_exit_uuidlist(void)
77 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index)
79 struct uuid_nid_data *data;
83 obd_str2uuid(&tmp, uuid);
84 cfs_spin_lock(&g_uuid_lock);
85 cfs_list_for_each_entry(data, &g_uuid_list, un_list) {
86 if (obd_uuid_equals(&data->un_uuid, &tmp)) {
87 if (index >= data->un_nid_count)
91 *peer_nid = data->un_nids[index];
95 cfs_spin_unlock(&g_uuid_lock);
99 /* Add a nid to a niduuid. Multiple nids can be added to a single uuid;
100 LNET will choose the best one. */
101 int class_add_uuid(const char *uuid, __u64 nid)
103 struct uuid_nid_data *data, *entry;
106 LASSERT(nid != 0); /* valid newconfig NID is never zero */
108 if (strlen(uuid) > UUID_MAX - 1)
115 obd_str2uuid(&data->un_uuid, uuid);
116 data->un_nids[0] = nid;
117 data->un_nid_count = 1;
119 cfs_spin_lock(&g_uuid_lock);
120 cfs_list_for_each_entry(entry, &g_uuid_list, un_list) {
121 if (obd_uuid_equals(&entry->un_uuid, &data->un_uuid)) {
125 for (i = 0; i < data->un_nid_count; i++)
126 if (nid == entry->un_nids[i])
129 if (i == data->un_nid_count) {
130 LASSERT(data->un_nid_count < NIDS_MAX);
131 data->un_nids[++data->un_nid_count] = nid;
137 cfs_list_add(&data->un_list, &g_uuid_list);
138 cfs_spin_unlock(&g_uuid_lock);
141 CDEBUG(D_INFO, "found uuid %s %s cnt=%d\n", uuid,
142 libcfs_nid2str(nid), entry->un_nid_count);
143 OBD_FREE(data, sizeof(*data));
145 CDEBUG(D_INFO, "add uuid %s %s\n", uuid, libcfs_nid2str(nid));
150 /* Delete the nids for one uuid if specified, otherwise delete all */
151 int class_del_uuid(const char *uuid)
153 CFS_LIST_HEAD(deathrow);
154 struct uuid_nid_data *data;
156 cfs_spin_lock(&g_uuid_lock);
160 obd_str2uuid(&tmp, uuid);
161 cfs_list_for_each_entry(data, &g_uuid_list, un_list) {
162 if (obd_uuid_equals(&data->un_uuid, &tmp)) {
163 cfs_list_move(&data->un_list, &deathrow);
168 cfs_list_splice_init(&g_uuid_list, &deathrow);
169 cfs_spin_unlock(&g_uuid_lock);
171 if (uuid != NULL && cfs_list_empty(&deathrow)) {
172 CDEBUG(D_INFO, "Try to delete a non-existent uuid %s\n", uuid);
176 while (!cfs_list_empty(&deathrow)) {
177 data = cfs_list_entry(deathrow.next, struct uuid_nid_data,
179 cfs_list_del(&data->un_list);
181 CDEBUG(D_INFO, "del uuid %s %s/%d\n",
182 obd_uuid2str(&data->un_uuid),
183 libcfs_nid2str(data->un_nids[0]),
186 OBD_FREE(data, sizeof(*data));
192 /* check if @nid exists in nid list of @uuid */
193 int class_check_uuid(struct obd_uuid *uuid, __u64 nid)
195 struct uuid_nid_data *entry;
199 CDEBUG(D_INFO, "check if uuid %s has %s.\n",
200 obd_uuid2str(uuid), libcfs_nid2str(nid));
202 cfs_spin_lock(&g_uuid_lock);
203 cfs_list_for_each_entry(entry, &g_uuid_list, un_list) {
206 if (!obd_uuid_equals(&entry->un_uuid, uuid))
209 /* found the uuid, check if it has @nid */
210 for (i = 0; i < entry->un_nid_count; i++) {
211 if (entry->un_nids[i] == nid) {
217 cfs_spin_unlock (&g_uuid_lock);
220 EXPORT_SYMBOL(class_check_uuid);