From 794fe2dc65f1ec4acacc388053bb52d32d3a932e Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 11 Jan 2006 15:37:17 +1100 Subject: [PATCH] [XFS] endianess annotations and tidying for the uuid code SGI-PV: 943272 SGI-Modid: xfs-linux-melb:xfs-kern:203709a Signed-off-by: Christoph Hellwig Signed-off-by: Nathan Scott --- fs/xfs/support/uuid.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/fs/xfs/support/uuid.c b/fs/xfs/support/uuid.c index 69ec4f540c..a3d565a677 100644 --- a/fs/xfs/support/uuid.c +++ b/fs/xfs/support/uuid.c @@ -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 -- 2.39.5