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authorDwight Engen <dwight.engen@oracle.com>2013-08-15 14:07:58 -0400
committerBen Myers <bpm@sgi.com>2013-08-15 14:17:34 -0500
commitc5eeb7ec3e1bb9884e97066bc293792ab57fb4ab (patch)
treed45db31136338ee54470c036e2056f9cf5b8a84b /fs/xfs/xfs_linux.h
parent4bb928cdb900d0614f4766d5f1ca5bc3844f7656 (diff)
xfs: create wrappers for converting kuid_t to/from uid_t
Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Gao feng <gaofeng@cn.fujitsu.com> Signed-off-by: Dwight Engen <dwight.engen@oracle.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_linux.h')
-rw-r--r--fs/xfs/xfs_linux.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index 3bc52b78f8b7..2dbabcb31a7d 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -191,6 +191,32 @@ typedef __uint64_t __psunsigned_t;
#define MAX(a,b) (max(a,b))
#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
*/