cregit-Linux how code gets into the kernel

Release 4.10 fs/xfs/uuid.c

Directory: fs/xfs
/*
 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms 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.  See the
 * GNU General Public License for more details.
 *
 * 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
 */
#include <xfs.h>

/* 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;

/*
 * 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]) { xfs_uu_t *uup = (xfs_uu_t *)uuid; fsid[0] = (be16_to_cpu(uup->uu_clockseq) << 16) | be16_to_cpu(uup->uu_timemid); fsid[1] = be32_to_cpu(uup->uu_timelow); }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig5998.33%266.67%
nathan scottnathan scott11.67%133.33%
Total60100.00%3100.00%


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 */ }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig5895.08%150.00%
nathan scottnathan scott34.92%150.00%
Total61100.00%2100.00%


int uuid_equal(uuid_t *uuid1, uuid_t *uuid2) { return memcmp(uuid1, uuid2, sizeof(uuid_t)) ? 0 : 1; }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig2790.00%133.33%
nathan scottnathan scott310.00%266.67%
Total30100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig17295.03%228.57%
nathan scottnathan scott94.97%571.43%
Total181100.00%7100.00%
Directory: fs/xfs
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