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Commit 794fe2dc authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Nathan Scott
Browse files

[XFS] endianess annotations and tidying for the uuid code 



SGI-PV: 943272
SGI-Modid: xfs-linux-melb:xfs-kern:203709a

Signed-off-by: default avatarChristoph Hellwig <hch@sgi.com>
Signed-off-by: default avatarNathan Scott <nathans@sgi.com>
parent 60a204f0

fs/xfs/support/uuid.c

+14 −9
Original line number Diff line number Diff line
@@ -27,6 +27,16 @@ uuid_init(void) 
	mutex_init(&uuid_monitor);

}





/* 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.

 *
@@ -36,16 +46,11 @@ uuid_init(void) 
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

	 */

	xfs_uu_t *uup = (xfs_uu_t *)uuid;



	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);

	fsid[0] = (be16_to_cpu(uup->uu_clockseq) << 16) |

		   be16_to_cpu(uup->uu_timemid);

	fsid[1] = be16_to_cpu(uup->uu_timelow);

}



void