4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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30 * Copyright (c) 2011, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_RPC
40 # include <liblustre.h>
43 #include <obd_support.h>
44 #include <obd_class.h>
45 #include <lustre_lib.h>
46 #include <lustre_ha.h>
47 #include <lustre_net.h>
48 #include <lprocfs_status.h>
52 struct uuid_nid_data {
54 struct obd_uuid un_uuid;
56 lnet_nid_t un_nids[NIDS_MAX];
59 /* FIXME: This should probably become more elegant than a global linked list */
60 static cfs_list_t g_uuid_list;
61 static cfs_spinlock_t g_uuid_lock;
63 void class_init_uuidlist(void)
65 CFS_INIT_LIST_HEAD(&g_uuid_list);
66 cfs_spin_lock_init(&g_uuid_lock);
69 void class_exit_uuidlist(void)
75 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index)
77 struct uuid_nid_data *data;
81 obd_str2uuid(&tmp, uuid);
82 cfs_spin_lock(&g_uuid_lock);
83 cfs_list_for_each_entry(data, &g_uuid_list, un_list) {
84 if (obd_uuid_equals(&data->un_uuid, &tmp)) {
85 if (index >= data->un_nid_count)
89 *peer_nid = data->un_nids[index];
93 cfs_spin_unlock(&g_uuid_lock);
97 /* Add a nid to a niduuid. Multiple nids can be added to a single uuid;
98 LNET will choose the best one. */
99 int class_add_uuid(const char *uuid, __u64 nid)
101 struct uuid_nid_data *data, *entry;
104 LASSERT(nid != 0); /* valid newconfig NID is never zero */
106 if (strlen(uuid) > UUID_MAX - 1)
113 obd_str2uuid(&data->un_uuid, uuid);
114 data->un_nids[0] = nid;
115 data->un_nid_count = 1;
117 cfs_spin_lock(&g_uuid_lock);
118 cfs_list_for_each_entry(entry, &g_uuid_list, un_list) {
119 if (obd_uuid_equals(&entry->un_uuid, &data->un_uuid)) {
123 for (i = 0; i < entry->un_nid_count; i++)
124 if (nid == entry->un_nids[i])
127 if (i == entry->un_nid_count) {
128 LASSERT(entry->un_nid_count < NIDS_MAX);
129 entry->un_nids[entry->un_nid_count++] = nid;
135 cfs_list_add(&data->un_list, &g_uuid_list);
136 cfs_spin_unlock(&g_uuid_lock);
139 CDEBUG(D_INFO, "found uuid %s %s cnt=%d\n", uuid,
140 libcfs_nid2str(nid), entry->un_nid_count);
141 OBD_FREE(data, sizeof(*data));
143 CDEBUG(D_INFO, "add uuid %s %s\n", uuid, libcfs_nid2str(nid));
148 /* Delete the nids for one uuid if specified, otherwise delete all */
149 int class_del_uuid(const char *uuid)
151 CFS_LIST_HEAD(deathrow);
152 struct uuid_nid_data *data;
154 cfs_spin_lock(&g_uuid_lock);
158 obd_str2uuid(&tmp, uuid);
159 cfs_list_for_each_entry(data, &g_uuid_list, un_list) {
160 if (obd_uuid_equals(&data->un_uuid, &tmp)) {
161 cfs_list_move(&data->un_list, &deathrow);
166 cfs_list_splice_init(&g_uuid_list, &deathrow);
167 cfs_spin_unlock(&g_uuid_lock);
169 if (uuid != NULL && cfs_list_empty(&deathrow)) {
170 CDEBUG(D_INFO, "Try to delete a non-existent uuid %s\n", uuid);
174 while (!cfs_list_empty(&deathrow)) {
175 data = cfs_list_entry(deathrow.next, struct uuid_nid_data,
177 cfs_list_del(&data->un_list);
179 CDEBUG(D_INFO, "del uuid %s %s/%d\n",
180 obd_uuid2str(&data->un_uuid),
181 libcfs_nid2str(data->un_nids[0]),
184 OBD_FREE(data, sizeof(*data));
190 /* check if @nid exists in nid list of @uuid */
191 int class_check_uuid(struct obd_uuid *uuid, __u64 nid)
193 struct uuid_nid_data *entry;
197 CDEBUG(D_INFO, "check if uuid %s has %s.\n",
198 obd_uuid2str(uuid), libcfs_nid2str(nid));
200 cfs_spin_lock(&g_uuid_lock);
201 cfs_list_for_each_entry(entry, &g_uuid_list, un_list) {
204 if (!obd_uuid_equals(&entry->un_uuid, uuid))
207 /* found the uuid, check if it has @nid */
208 for (i = 0; i < entry->un_nid_count; i++) {
209 if (entry->un_nids[i] == nid) {
216 cfs_spin_unlock (&g_uuid_lock);
219 EXPORT_SYMBOL(class_check_uuid);