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fs/xfs/uuid.c
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/* |
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. * All Rights Reserved. |
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* |
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* This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation. * |
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* 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. See the * GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <xfs.h> |
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/* IRIX interpretation of an uuid_t */ typedef struct { __be32 uu_timelow; __be16 uu_timemid; __be16 uu_timehi; __be16 uu_clockseq; __be16 uu_node[3]; } xfs_uu_t; |
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/* * 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]) { |
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xfs_uu_t *uup = (xfs_uu_t *)uuid; |
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fsid[0] = (be16_to_cpu(uup->uu_clockseq) << 16) | be16_to_cpu(uup->uu_timemid); |
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fsid[1] = be32_to_cpu(uup->uu_timelow); |
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} |
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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; } |