Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

Pull user namespaces work from Eric Biederman:
 "The work to convert the kernel to use kuid_t and kgid_t has been
  finished since 3.12 so it is time to remove the scaffolding that
  allowed the work to progress incrementally.

  The first patch on this branch just removes the scaffolding, ensuring
  we will always get compile errors if people accidentally try the
  userspace and the kernel uid and gid types.  The second patch an
  overlooked and unused chunk of mips code that that fails to build
  after the first patch.

  The code hasn't been in linux-next for long (as I was out of it and
  could not sheppared the cold properly) but the patch has been around
  for a long time just waiting for the day when I had finished the
  uid/gid conversions.  Putting the code in linux-next did find the
  compile failure on mips so I took the time to get that fix reviewed
  and included.  Beyond that I am not too worried about errors because
  all these two patches do is delete a modest amount of code"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  MIPS: VPE: Remove vpe_getuid and vpe_getgid
  userns:  userns: Remove UIDGID_STRICT_TYPE_CHECKS

arch/mips/include/asm/vpe.h

@@ -30,8 +30,6 @@ struct vpe_notifications {
 extern int vpe_notify(int index, struct vpe_notifications *notify);
 
 extern void *vpe_get_shared(int index);
-extern int vpe_getuid(int index);
-extern int vpe_getgid(int index);
 extern char *vpe_getcwd(int index);
 
 #endif /* _ASM_VPE_H */

arch/mips/kernel/vpe.c

@@ -105,7 +105,6 @@ struct vpe {
 	unsigned long len;
 	char *pbuffer;
 	unsigned long plen;
-	unsigned int uid, gid;
 	char cwd[VPE_PATH_MAX];
 
 	unsigned long __start;
@@ -1083,9 +1082,6 @@ static int vpe_open(struct inode *inode, struct file *filp)
 	v->load_addr = NULL;
 	v->len = 0;
 
-	v->uid = filp->f_cred->fsuid;
-	v->gid = filp->f_cred->fsgid;
-
 	v->cwd[0] = 0;
 	ret = getcwd(v->cwd, VPE_PATH_MAX);
 	if (ret < 0)
@@ -1269,30 +1265,6 @@ void *vpe_get_shared(int index)
 
 EXPORT_SYMBOL(vpe_get_shared);
 
-int vpe_getuid(int index)
-{
-	struct vpe *v;
-
-	if ((v = get_vpe(index)) == NULL)
-		return -1;
-
-	return v->uid;
-}
-
-EXPORT_SYMBOL(vpe_getuid);
-
-int vpe_getgid(int index)
-{
-	struct vpe *v;
-
-	if ((v = get_vpe(index)) == NULL)
-		return -1;
-
-	return v->gid;
-}
-
-EXPORT_SYMBOL(vpe_getgid);
-
 int vpe_notify(int index, struct vpe_notifications *notify)
 {
 	struct vpe *v;

include/linux/posix_acl.h

@@ -39,9 +39,6 @@ struct posix_acl_entry {
 	union {
 		kuid_t		e_uid;
 		kgid_t		e_gid;
-#ifndef CONFIG_UIDGID_STRICT_TYPE_CHECKS
-		unsigned int	e_id;
-#endif
 	};
 };
 

include/linux/projid.h

@@ -18,8 +18,6 @@ extern struct user_namespace init_user_ns;
 
 typedef __kernel_uid32_t projid_t;
 
-#ifdef CONFIG_UIDGID_STRICT_TYPE_CHECKS
-
 typedef struct {
 	projid_t val;
 } kprojid_t;
@@ -31,19 +29,6 @@ static inline projid_t __kprojid_val(kprojid_t projid)
 
 #define KPROJIDT_INIT(value) (kprojid_t){ value }
 
-#else
-
-typedef projid_t kprojid_t;
-
-static inline projid_t __kprojid_val(kprojid_t projid)
-{
-	return projid;
-}
-
-#define KPROJIDT_INIT(value) ((kprojid_t) value )
-
-#endif
-
 #define INVALID_PROJID KPROJIDT_INIT(-1)
 #define OVERFLOW_PROJID 65534
 

include/linux/uidgid.h

@@ -17,8 +17,6 @@
 struct user_namespace;
 extern struct user_namespace init_user_ns;
 
-#ifdef CONFIG_UIDGID_STRICT_TYPE_CHECKS
-
 typedef struct {
 	uid_t val;
 } kuid_t;
@@ -41,26 +39,6 @@ static inline gid_t __kgid_val(kgid_t gid)
 	return gid.val;
 }
 
-#else
-
-typedef uid_t kuid_t;
-typedef gid_t kgid_t;
-
-static inline uid_t __kuid_val(kuid_t uid)
-{
-	return uid;
-}
-
-static inline gid_t __kgid_val(kgid_t gid)
-{
-	return gid;
-}
-
-#define KUIDT_INIT(value) ((kuid_t) value )
-#define KGIDT_INIT(value) ((kgid_t) value )
-
-#endif
-
 #define GLOBAL_ROOT_UID KUIDT_INIT(0)
 #define GLOBAL_ROOT_GID KGIDT_INIT(0)
 

init/Kconfig

@@ -1116,8 +1116,6 @@ config IPC_NS
 
 config USER_NS
 	bool "User namespace"
-	select UIDGID_STRICT_TYPE_CHECKS
-
 	default n
 	help
 	  This allows containers, i.e. vservers, to use user namespaces
@@ -1149,15 +1147,6 @@ config NET_NS
 
 endif # NAMESPACES
 
-config UIDGID_STRICT_TYPE_CHECKS
-	bool "Require conversions between uid/gids and their internal representation"
-	default n
-	help
-	 While the nececessary conversions are being added to all subsystems this option allows
-	 the code to continue to build for unconverted subsystems.
-
-	 Say Y here if you want the strict type checking enabled
-
 config SCHED_AUTOGROUP
 	bool "Automatic process group scheduling"
 	select CGROUPS