-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* 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 [sun.com URL with a
- * copy of GPLv2].
+ * 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
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Whamcloud, Inc.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#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 */
+ cfs_list_t 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 cfs_list_t g_uuid_list;
+static cfs_spinlock_t g_uuid_lock;
void class_init_uuidlist(void)
{
CFS_INIT_LIST_HEAD(&g_uuid_list);
- spin_lock_init(&g_uuid_lock);
+ cfs_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;
+ struct uuid_nid_data *data;
+ struct obd_uuid tmp;
+ int rc = -ENOENT;
+
+ obd_str2uuid(&tmp, uuid);
+ cfs_spin_lock(&g_uuid_lock);
+ cfs_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 -ENOENT;
+ cfs_spin_unlock(&g_uuid_lock);
+ return rc;
}
/* Add a nid to a niduuid. Multiple nids can be added to a single uuid;
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;
- }
-
- memcpy(data->un_uuid, uuid, nob);
- data->un_nid = nid;
- data->un_count = 1;
+ obd_str2uuid(&data->un_uuid, uuid);
+ data->un_nids[0] = nid;
+ data->un_nid_count = 1;
- spin_lock (&g_uuid_lock);
+ cfs_spin_lock(&g_uuid_lock);
+ cfs_list_for_each_entry(entry, &g_uuid_list, un_list) {
+ if (obd_uuid_equals(&entry->un_uuid, &data->un_uuid)) {
+ int i;
- 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++;
+ found = 1;
+ for (i = 0; i < entry->un_nid_count; i++)
+ if (nid == entry->un_nids[i])
+ break;
+
+ 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)
+ cfs_list_add(&data->un_list, &g_uuid_list);
+ cfs_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));
{
CFS_LIST_HEAD(deathrow);
struct uuid_nid_data *data;
- int found = 0;
- spin_lock (&g_uuid_lock);
- if (uuid == NULL) {
- list_splice_init(&g_uuid_list, &deathrow);
- found = 1;
- } else {
- list_for_each_entry(data, &g_uuid_list, un_list) {
- if (strcmp(data->un_uuid, uuid))
- continue;
- --data->un_count;
- LASSERT(data->un_count >= 0);
- if (data->un_count == 0)
- list_move(&data->un_list, &deathrow);
- found = 1;
- break;
+ cfs_spin_lock(&g_uuid_lock);
+ if (uuid != NULL) {
+ struct obd_uuid tmp;
+
+ obd_str2uuid(&tmp, uuid);
+ cfs_list_for_each_entry(data, &g_uuid_list, un_list) {
+ if (obd_uuid_equals(&data->un_uuid, &tmp)) {
+ cfs_list_move(&data->un_list, &deathrow);
+ break;
+ }
}
- }
- spin_unlock (&g_uuid_lock);
+ } else
+ cfs_list_splice_init(&g_uuid_list, &deathrow);
+ cfs_spin_unlock(&g_uuid_lock);
- if (!found) {
- if (uuid)
- CERROR("Try to delete a non-existent uuid %s\n", uuid);
+ if (uuid != NULL && cfs_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);
+ while (!cfs_list_empty(&deathrow)) {
+ data = cfs_list_entry(deathrow.next, struct uuid_nid_data,
+ un_list);
+ cfs_list_del(&data->un_list);
- CDEBUG(D_INFO, "del uuid %s %s\n", data->un_uuid,
- libcfs_nid2str(data->un_nid));
+ 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->un_uuid, strlen(data->un_uuid) + 1);
OBD_FREE(data, sizeof(*data));
}
return 0;
}
+
+/* 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;
+
+ CDEBUG(D_INFO, "check if uuid %s has %s.\n",
+ obd_uuid2str(uuid), libcfs_nid2str(nid));
+
+ cfs_spin_lock(&g_uuid_lock);
+ cfs_list_for_each_entry(entry, &g_uuid_list, un_list) {
+ int i;
+
+ if (!obd_uuid_equals(&entry->un_uuid, uuid))
+ continue;
+
+ /* 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;
+ }
+ cfs_spin_unlock (&g_uuid_lock);
+ RETURN(found);
+}
+EXPORT_SYMBOL(class_check_uuid);