-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of the Lustre file system, http://www.lustre.org
- * Lustre is a trademark of Cluster File Systems, Inc.
+ * 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.
*
- * You may have signed or agreed to another license before downloading
- * this software. If so, you are bound by the terms and conditions
- * of that agreement, and the following does not apply to you. See the
- * LICENSE file included with this distribution for more information.
+ * 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).
*
- * If you did not agree to a different license, then this copy of Lustre
- * is open source software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
+ * 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
*
- * In either case, Lustre 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
- * license text for more details.
+ * 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) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*/
#define DEBUG_SUBSYSTEM S_RPC
#include <lustre_net.h>
#include <lprocfs_status.h>
+#define NIDS_MAX 32
+
struct uuid_nid_data {
- struct list_head un_list;
- lnet_nid_t un_nid;
- char *un_uuid;
- int un_count; /* nid/uuid pair refcount */
+ struct list_head un_list;
+ struct obd_uuid un_uuid;
+ int un_nid_count;
+ lnet_nid_t un_nids[NIDS_MAX];
};
/* FIXME: This should probably become more elegant than a global linked list */
-static struct list_head g_uuid_list;
-static spinlock_t g_uuid_lock;
+static struct list_head g_uuid_list;
+static spinlock_t g_uuid_lock;
void class_init_uuidlist(void)
{
- CFS_INIT_LIST_HEAD(&g_uuid_list);
- spin_lock_init(&g_uuid_lock);
+ INIT_LIST_HEAD(&g_uuid_list);
+ spin_lock_init(&g_uuid_lock);
}
void class_exit_uuidlist(void)
int lustre_uuid_to_peer(const char *uuid, lnet_nid_t *peer_nid, int index)
{
- struct list_head *tmp;
-
- spin_lock (&g_uuid_lock);
-
- list_for_each(tmp, &g_uuid_list) {
- struct uuid_nid_data *data =
- list_entry(tmp, struct uuid_nid_data, un_list);
-
- if (!strcmp(data->un_uuid, uuid) &&
- index-- == 0) {
- *peer_nid = data->un_nid;
-
- spin_unlock (&g_uuid_lock);
- return 0;
- }
- }
-
- spin_unlock (&g_uuid_lock);
- return -ENOENT;
+ struct uuid_nid_data *data;
+ struct obd_uuid tmp;
+ int rc = -ENOENT;
+
+ obd_str2uuid(&tmp, uuid);
+ spin_lock(&g_uuid_lock);
+ list_for_each_entry(data, &g_uuid_list, un_list) {
+ if (obd_uuid_equals(&data->un_uuid, &tmp)) {
+ if (index >= data->un_nid_count)
+ break;
+
+ rc = 0;
+ *peer_nid = data->un_nids[index];
+ break;
+ }
+ }
+ spin_unlock(&g_uuid_lock);
+ return rc;
}
+EXPORT_SYMBOL(lustre_uuid_to_peer);
/* Add a nid to a niduuid. Multiple nids can be added to a single uuid;
LNET will choose the best one. */
int class_add_uuid(const char *uuid, __u64 nid)
{
struct uuid_nid_data *data, *entry;
- int nob = strnlen (uuid, CFS_PAGE_SIZE) + 1;
int found = 0;
LASSERT(nid != 0); /* valid newconfig NID is never zero */
- if (nob > CFS_PAGE_SIZE)
- return -EINVAL;
+ if (strlen(uuid) > UUID_MAX - 1)
+ return -EOVERFLOW;
- OBD_ALLOC(data, sizeof(*data));
+ OBD_ALLOC_PTR(data);
if (data == NULL)
return -ENOMEM;
- OBD_ALLOC(data->un_uuid, nob);
- if (data == NULL) {
- OBD_FREE(data, sizeof(*data));
- return -ENOMEM;
- }
+ obd_str2uuid(&data->un_uuid, uuid);
+ data->un_nids[0] = nid;
+ data->un_nid_count = 1;
- memcpy(data->un_uuid, uuid, nob);
- data->un_nid = nid;
- data->un_count = 1;
+ spin_lock(&g_uuid_lock);
+ list_for_each_entry(entry, &g_uuid_list, un_list) {
+ if (obd_uuid_equals(&entry->un_uuid, &data->un_uuid)) {
+ int i;
- spin_lock (&g_uuid_lock);
+ found = 1;
+ for (i = 0; i < entry->un_nid_count; i++)
+ if (nid == entry->un_nids[i])
+ break;
- list_for_each_entry(entry, &g_uuid_list, un_list) {
- if (entry->un_nid == nid &&
- (strcmp(entry->un_uuid, uuid) == 0)) {
- found++;
- entry->un_count++;
+ if (i == entry->un_nid_count) {
+ LASSERT(entry->un_nid_count < NIDS_MAX);
+ entry->un_nids[entry->un_nid_count++] = nid;
+ }
break;
}
}
- if (!found)
- list_add(&data->un_list, &g_uuid_list);
- spin_unlock (&g_uuid_lock);
+ if (!found)
+ list_add(&data->un_list, &g_uuid_list);
+ spin_unlock(&g_uuid_lock);
if (found) {
- CDEBUG(D_INFO, "found uuid %s %s cnt=%d\n", uuid,
- libcfs_nid2str(nid), entry->un_count);
- OBD_FREE(data->un_uuid, nob);
+ CDEBUG(D_INFO, "found uuid %s %s cnt=%d\n", uuid,
+ libcfs_nid2str(nid), entry->un_nid_count);
OBD_FREE(data, sizeof(*data));
} else {
CDEBUG(D_INFO, "add uuid %s %s\n", uuid, libcfs_nid2str(nid));
}
return 0;
}
+EXPORT_SYMBOL(class_add_uuid);
/* Delete the nids for one uuid if specified, otherwise delete all */
int class_del_uuid(const char *uuid)
{
- struct list_head deathrow;
- struct uuid_nid_data *data, *n;
-
- CFS_INIT_LIST_HEAD (&deathrow);
-
- spin_lock (&g_uuid_lock);
-
- list_for_each_entry_safe(data, n, &g_uuid_list, un_list) {
- if (uuid == NULL) {
- list_del (&data->un_list);
- list_add (&data->un_list, &deathrow);
- } else if (strcmp(data->un_uuid, uuid) == 0) {
- --data->un_count;
- if (data->un_count <= 0) {
- list_del (&data->un_list);
- list_add (&data->un_list, &deathrow);
- }
- break;
- }
- }
- spin_unlock (&g_uuid_lock);
+ struct uuid_nid_data *data;
+ struct list_head deathrow;
+
+ INIT_LIST_HEAD(&deathrow);
+
+ spin_lock(&g_uuid_lock);
+ if (uuid != NULL) {
+ struct obd_uuid tmp;
+
+ obd_str2uuid(&tmp, uuid);
+ list_for_each_entry(data, &g_uuid_list, un_list) {
+ if (obd_uuid_equals(&data->un_uuid, &tmp)) {
+ list_move(&data->un_list, &deathrow);
+ break;
+ }
+ }
+ } else
+ list_splice_init(&g_uuid_list, &deathrow);
+ spin_unlock(&g_uuid_lock);
+
+ if (uuid != NULL && list_empty(&deathrow)) {
+ CDEBUG(D_INFO, "Try to delete a non-existent uuid %s\n", uuid);
+ return -EINVAL;
+ }
+
+ while (!list_empty(&deathrow)) {
+ data = list_entry(deathrow.next, struct uuid_nid_data,
+ un_list);
+ list_del(&data->un_list);
+
+ CDEBUG(D_INFO, "del uuid %s %s/%d\n",
+ obd_uuid2str(&data->un_uuid),
+ libcfs_nid2str(data->un_nids[0]),
+ data->un_nid_count);
+
+ OBD_FREE(data, sizeof(*data));
+ }
+ return 0;
+}
- if (list_empty (&deathrow)) {
- if (uuid)
- CERROR("delete non-existent uuid %s\n", uuid);
- return -EINVAL;
- }
+/* check if @nid exists in nid list of @uuid */
+int class_check_uuid(struct obd_uuid *uuid, __u64 nid)
+{
+ struct uuid_nid_data *entry;
+ int found = 0;
+ ENTRY;
- do {
- data = list_entry(deathrow.next, struct uuid_nid_data, un_list);
+ CDEBUG(D_INFO, "check if uuid %s has %s.\n",
+ obd_uuid2str(uuid), libcfs_nid2str(nid));
- list_del (&data->un_list);
- CDEBUG(D_INFO, "del uuid %s %s\n", data->un_uuid,
- libcfs_nid2str(data->un_nid));
+ spin_lock(&g_uuid_lock);
+ list_for_each_entry(entry, &g_uuid_list, un_list) {
+ int i;
- OBD_FREE(data->un_uuid, strlen(data->un_uuid) + 1);
- OBD_FREE(data, sizeof(*data));
- } while (!list_empty (&deathrow));
+ if (!obd_uuid_equals(&entry->un_uuid, uuid))
+ continue;
- return 0;
+ /* found the uuid, check if it has @nid */
+ for (i = 0; i < entry->un_nid_count; i++) {
+ if (entry->un_nids[i] == nid) {
+ found = 1;
+ break;
+ }
+ }
+ break;
+ }
+ spin_unlock(&g_uuid_lock);
+ RETURN(found);
}
+EXPORT_SYMBOL(class_check_uuid);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff