1 files changed, 20 insertions, 19 deletions

diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index faf467944baf..4e72922e5a75 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -6,14 +6,24 @@
 #include <linux/sched.h>
 #include <linux/err.h>
 
-#define UIDHASH_BITS    (CONFIG_BASE_SMALL ? 3 : 7)
-#define UIDHASH_SZ      (1 << UIDHASH_BITS)
+#define UID_GID_MAP_MAX_EXTENTS 5
+
+struct uid_gid_map {    /* 64 bytes -- 1 cache line */
+        u32 nr_extents;
+        struct uid_gid_extent {
+                u32 first;
+                u32 lower_first;
+                u32 count;
+        } extent[UID_GID_MAP_MAX_EXTENTS];
+};
 
 struct user_namespace {
+        struct uid_gid_map      uid_map;
+        struct uid_gid_map      gid_map;
         struct kref             kref;
-        struct hlist_head       uidhash_table[UIDHASH_SZ];
-        struct user_struct      *creator;
-        struct work_struct      destroyer;
+        struct user_namespace   *parent;
+        kuid_t                  owner;
+        kgid_t                  group;
 };
 
 extern struct user_namespace init_user_ns;
@@ -36,9 +46,11 @@ static inline void put_user_ns(struct user_namespace *ns)
                 kref_put(&ns->kref, free_user_ns);
 }
 
-uid_t user_ns_map_uid(struct user_namespace *to, const struct cred *cred, uid_t uid);
-gid_t user_ns_map_gid(struct user_namespace *to, const struct cred *cred, gid_t gid);
-
+struct seq_operations;
+extern struct seq_operations proc_uid_seq_operations;
+extern struct seq_operations proc_gid_seq_operations;
+extern ssize_t proc_uid_map_write(struct file *, const char __user *, size_t, loff_t *);
+extern ssize_t proc_gid_map_write(struct file *, const char __user *, size_t, loff_t *);
 #else
 
 static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
@@ -55,17 +67,6 @@ static inline void put_user_ns(struct user_namespace *ns)
 {
 }
 
-static inline uid_t user_ns_map_uid(struct user_namespace *to,
-        const struct cred *cred, uid_t uid)
-{
-        return uid;
-}
-static inline gid_t user_ns_map_gid(struct user_namespace *to,
-        const struct cred *cred, gid_t gid)
-{
-        return gid;
-}
-
 #endif
 
 #endif /* _LINUX_USER_H */