diff options
Diffstat (limited to 'sys/gnu/fs/xfs/FreeBSD/support/uuid.c')
| -rw-r--r-- | sys/gnu/fs/xfs/FreeBSD/support/uuid.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/sys/gnu/fs/xfs/FreeBSD/support/uuid.c b/sys/gnu/fs/xfs/FreeBSD/support/uuid.c deleted file mode 100644 index 55344c0..0000000 --- a/sys/gnu/fs/xfs/FreeBSD/support/uuid.c +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. - * - * This program is free 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. - * - * This program is distributed in the hope that it would be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - * - * Further, this software is distributed without any warranty that it is - * free of the rightful claim of any third person regarding infringement - * or the like. Any license provided herein, whether implied or - * otherwise, applies only to this software file. Patent licenses, if - * any, provided herein do not apply to combinations of this program with - * other software, or any other product whatsoever. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, - * Mountain View, CA 94043, or: - * - * http://www.sgi.com - * - * For further information regarding this notice, see: - * - * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ - */ - -#include <xfs_config.h> -#include <xfs_compat.h> -#include <xfs_types.h> -#include <xfs_arch.h> - -#include <support/uuid.h> -#include <support/kmem.h> -#include <support/debug.h> -#include <support/mutex.h> - -static mutex_t uuid_monitor; -static int uuid_table_size; -static uuid_t *uuid_table; - -void -uuid_init(void) -{ - mutex_init(&uuid_monitor, MUTEX_DEFAULT, "uuid_monitor"); -} - -void -uuid_cleanup(void) -{ - mutex_destroy(&uuid_monitor); -} - -/* - * uuid_getnodeuniq - obtain the node unique fields of a UUID. - * - * This is not in any way a standard or condoned UUID function; - * it just something that's needed for user-level file handles. - */ -void -uuid_getnodeuniq(uuid_t *uuid, int fsid [2]) -{ - char *uu = (char *)uuid; - - /* on IRIX, this function assumes big-endian fields within - * the uuid, so we use INT_GET to get the same result on - * little-endian systems - */ - - fsid[0] = (INT_GET(*(u_int16_t*)(uu+8), ARCH_CONVERT) << 16) + - INT_GET(*(u_int16_t*)(uu+4), ARCH_CONVERT); - fsid[1] = INT_GET(*(u_int32_t*)(uu ), ARCH_CONVERT); -} - -void -uuid_create_nil(uuid_t *uuid) -{ - memset(uuid, 0, sizeof(*uuid)); -} - -int -uuid_is_nil(uuid_t *uuid) -{ - int i; - char *cp = (char *)uuid; - - if (uuid == NULL) - return 0; - /* implied check of version number here... */ - for (i = 0; i < sizeof *uuid; i++) - if (*cp++) return 0; /* not nil */ - return 1; /* is nil */ -} - -int -uuid_equal(uuid_t *uuid1, uuid_t *uuid2) -{ - return memcmp(uuid1, uuid2, sizeof(uuid_t)) ? 0 : 1; -} - -/* - * Given a 128-bit uuid, return a 64-bit value by adding the top and bottom - * 64-bit words. NOTE: This function can not be changed EVER. Although - * brain-dead, some applications depend on this 64-bit value remaining - * persistent. Specifically, DMI vendors store the value as a persistent - * filehandle. - */ -__uint64_t -uuid_hash64(uuid_t *uuid) -{ - __uint64_t *sp = (__uint64_t *)uuid; - - return sp[0] + sp[1]; -} - -int -uuid_table_insert(uuid_t *uuid) -{ - int i, hole; - - mutex_lock(&uuid_monitor, PVFS); - for (i = 0, hole = -1; i < uuid_table_size; i++) { - if (uuid_is_nil(&uuid_table[i])) { - hole = i; - continue; - } - if (uuid_equal(uuid, &uuid_table[i])) { - mutex_unlock(&uuid_monitor); - return 0; - } - } - if (hole < 0) { - uuid_table = kmem_realloc(uuid_table, - (uuid_table_size + 1) * sizeof(*uuid_table), - uuid_table_size * sizeof(*uuid_table), - KM_SLEEP); - hole = uuid_table_size++; - } - uuid_table[hole] = *uuid; - mutex_unlock(&uuid_monitor); - return 1; -} - -void -uuid_table_remove(uuid_t *uuid) -{ - int i; - - mutex_lock(&uuid_monitor, PVFS); - for (i = 0; i < uuid_table_size; i++) { - if (uuid_is_nil(&uuid_table[i])) - continue; - if (!uuid_equal(uuid, &uuid_table[i])) - continue; - uuid_create_nil(&uuid_table[i]); - break; - } - ASSERT(i < uuid_table_size); - mutex_unlock(&uuid_monitor); -} |
