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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_RPC
36 #include <obd_support.h>
37 #include <obd_class.h>
38 #include <lustre_lib.h>
39 #include <lustre_ha.h>
40 #include <lustre_net.h>
41 #include <lprocfs_status.h>
45 struct uuid_nid_data {
46 struct list_head un_list;
47 struct obd_uuid un_uuid;
49 lnet_nid_t un_nids[NIDS_MAX];
52 /* FIXME: This should probably become more elegant than a global linked list */
53 static LIST_HEAD(g_uuid_list);
54 static DEFINE_SPINLOCK(g_uuid_lock);
56 int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index)
58 struct uuid_nid_data *data;
62 obd_str2uuid(&tmp, uuid);
63 spin_lock(&g_uuid_lock);
64 list_for_each_entry(data, &g_uuid_list, un_list) {
65 if (obd_uuid_equals(&data->un_uuid, &tmp)) {
66 if (index >= data->un_nid_count)
70 *peer_nid = data->un_nids[index];
74 spin_unlock(&g_uuid_lock);
77 EXPORT_SYMBOL(lustre_uuid_to_peer);
79 /* Add a nid to a niduuid. Multiple nids can be added to a single uuid;
80 LNET will choose the best one. */
81 int class_add_uuid(const char *uuid, __u64 nid)
83 struct uuid_nid_data *data, *entry;
86 LASSERT(nid != 0); /* valid newconfig NID is never zero */
88 if (strlen(uuid) > UUID_MAX - 1)
95 obd_str2uuid(&data->un_uuid, uuid);
96 data->un_nids[0] = nid;
97 data->un_nid_count = 1;
99 spin_lock(&g_uuid_lock);
100 list_for_each_entry(entry, &g_uuid_list, un_list) {
101 if (obd_uuid_equals(&entry->un_uuid, &data->un_uuid)) {
105 for (i = 0; i < entry->un_nid_count; i++)
106 if (nid == entry->un_nids[i])
109 if (i == entry->un_nid_count) {
110 LASSERT(entry->un_nid_count < NIDS_MAX);
111 entry->un_nids[entry->un_nid_count++] = nid;
117 list_add(&data->un_list, &g_uuid_list);
118 spin_unlock(&g_uuid_lock);
121 CDEBUG(D_INFO, "found uuid %s %s cnt=%d\n", uuid,
122 libcfs_nid2str(nid), entry->un_nid_count);
123 OBD_FREE(data, sizeof(*data));
125 CDEBUG(D_INFO, "add uuid %s %s\n", uuid, libcfs_nid2str(nid));
130 /* Delete the nids for one uuid if specified, otherwise delete all */
131 int class_del_uuid(const char *uuid)
133 struct uuid_nid_data *data;
136 spin_lock(&g_uuid_lock);
140 obd_str2uuid(&tmp, uuid);
141 list_for_each_entry(data, &g_uuid_list, un_list) {
142 if (obd_uuid_equals(&data->un_uuid, &tmp)) {
143 list_move(&data->un_list, &deathrow);
148 list_splice_init(&g_uuid_list, &deathrow);
149 spin_unlock(&g_uuid_lock);
151 if (uuid != NULL && list_empty(&deathrow)) {
152 CDEBUG(D_INFO, "Try to delete a non-existent uuid %s\n", uuid);
156 while (!list_empty(&deathrow)) {
157 data = list_entry(deathrow.next, struct uuid_nid_data,
159 list_del(&data->un_list);
161 CDEBUG(D_INFO, "del uuid %s %s/%d\n",
162 obd_uuid2str(&data->un_uuid),
163 libcfs_nid2str(data->un_nids[0]),
166 OBD_FREE(data, sizeof(*data));
171 /* check if @nid exists in nid list of @uuid */
172 int class_check_uuid(struct obd_uuid *uuid, __u64 nid)
174 struct uuid_nid_data *entry;
179 CDEBUG(D_INFO, "check if uuid %s has %s.\n",
180 obd_uuid2str(uuid), libcfs_nid2str(nid));
182 spin_lock(&g_uuid_lock);
183 list_for_each_entry(entry, &g_uuid_list, un_list) {
186 if (!obd_uuid_equals(&entry->un_uuid, uuid))
189 /* found the uuid, check if it has @nid */
190 for (i = 0; i < entry->un_nid_count; i++) {
191 if (entry->un_nids[i] == nid) {
198 spin_unlock(&g_uuid_lock);
201 EXPORT_SYMBOL(class_check_uuid);