CRED: Wrap task credential accesses in the SYSV IPC subsystem

Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.

Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().

Change some task->e?[ug]id to task_e?[ug]id().  In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 68eb857cfdea..abda5991d7e3 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -117,8 +117,8 @@ static struct inode *mqueue_get_inode(struct super_block *sb, int mode,
         inode = new_inode(sb);
         if (inode) {
                 inode->i_mode = mode;
-                inode->i_uid = current->fsuid;
-                inode->i_gid = current->fsgid;
+                inode->i_uid = current_fsuid();
+                inode->i_gid = current_fsgid();
                 inode->i_blocks = 0;
                 inode->i_mtime = inode->i_ctime = inode->i_atime =
                                 CURRENT_TIME;
@@ -507,7 +507,7 @@ static void __do_notify(struct mqueue_inode_info *info)
                         sig_i.si_code = SI_MESGQ;
                         sig_i.si_value = info->notify.sigev_value;
                         sig_i.si_pid = task_tgid_vnr(current);
-                        sig_i.si_uid = current->uid;
+                        sig_i.si_uid = current_uid();
 
                         kill_pid_info(info->notify.sigev_signo,
                                       &sig_i, info->notify_owner);