From mboxrd@z Thu Jan 1 00:00:00 1970 From: "\"Eric W. Beiderman" Subject: [PATCH 10/43] userns: Deprecate and rename the user_namespace reference in the user_struct Date: Sat, 7 Apr 2012 22:15:06 -0700 Message-ID: <1333862139-31737-10-git-send-email-ebiederm@xmission.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Linux Containers , Cyrill Gorcunov , linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Al Viro , linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Andrew Morton , Linus Torvalds , "Eric W. Biederman" To: Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: linux-fsdevel.vger.kernel.org From: Eric W. Biederman With a user_ns reference in struct cred the only user of the user namespace reference in struct user_struct is to keep the uid hash table alive. The user_namespace reference in struct user_struct will be going away soon, and I have removed all of the references. Rename the field from user_ns to _user_ns so that the compiler can verify nothing follows the user struct to the user namespace anymore. Acked-by: Serge Hallyn Signed-off-by: Eric W. Biederman --- include/linux/sched.h | 2 +- kernel/user.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/sched.h b/include/linux/sched.h index 720ce8d..6867ae9 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -729,7 +729,7 @@ struct user_struct { /* Hash table maintenance information */ struct hlist_node uidhash_node; uid_t uid; - struct user_namespace *user_ns; + struct user_namespace *_user_ns; /* Don't use will be removed soon */ #ifdef CONFIG_PERF_EVENTS atomic_long_t locked_vm; diff --git a/kernel/user.c b/kernel/user.c index 71dd236..d65fec0 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -58,7 +58,7 @@ struct user_struct root_user = { .files = ATOMIC_INIT(0), .sigpending = ATOMIC_INIT(0), .locked_shm = 0, - .user_ns = &init_user_ns, + ._user_ns = &init_user_ns, }; /* @@ -72,7 +72,7 @@ static void uid_hash_insert(struct user_struct *up, struct hlist_head *hashent) static void uid_hash_remove(struct user_struct *up) { hlist_del_init(&up->uidhash_node); - put_user_ns(up->user_ns); + put_user_ns(up->_user_ns); /* It is safe to free the uid hash table now */ } static struct user_struct *uid_hash_find(uid_t uid, struct hlist_head *hashent) @@ -153,7 +153,7 @@ struct user_struct *alloc_uid(struct user_namespace *ns, uid_t uid) new->uid = uid; atomic_set(&new->__count, 1); - new->user_ns = get_user_ns(ns); + new->_user_ns = get_user_ns(ns); /* * Before adding this, check whether we raced -- 1.7.2.5