Commit c5eeb7ec authored by Dwight Engen's avatar Dwight Engen Committed by Ben Myers
Browse files

xfs: create wrappers for converting kuid_t to/from uid_t 



Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Reviewed-by: default avatarGao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: default avatarDwight Engen <dwight.engen@oracle.com>
Signed-off-by: default avatarBen Myers <bpm@sgi.com>
parent 4bb928cd

fs/xfs/xfs_linux.h

+26 −0
Original line number Original line Diff line number Diff line
@@ -191,6 +191,32 @@ typedef __uint64_t __psunsigned_t; 
#define MAX(a,b)	(max(a,b))

#define MAX(a,b)	(max(a,b))

#define howmany(x, y)	(((x)+((y)-1))/(y))

#define howmany(x, y)	(((x)+((y)-1))/(y))





/* Kernel uid/gid conversion. These are used to convert to/from the on disk

 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.

 * The conversion here is type only, the value will remain the same since we

 * are converting to the init_user_ns. The uid is later mapped to a particular

 * user namespace value when crossing the kernel/user boundary.

 */

static inline __uint32_t xfs_kuid_to_uid(kuid_t uid)

{

	return from_kuid(&init_user_ns, uid);

}



static inline kuid_t xfs_uid_to_kuid(__uint32_t uid)

{

	return make_kuid(&init_user_ns, uid);

}



static inline __uint32_t xfs_kgid_to_gid(kgid_t gid)

{

	return from_kgid(&init_user_ns, gid);

}



static inline kgid_t xfs_gid_to_kgid(__uint32_t gid)

{

	return make_kgid(&init_user_ns, gid);

}



/*

/*

 * Various platform dependent calls that don't fit anywhere else

 * Various platform dependent calls that don't fit anywhere else

 */

 */