CRED: Wrap task credential accesses in the autofs4 filesystem

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>
Cc: Ian Kent <raven@themaw.net>
Cc: autofs@linux.kernel.org
Signed-off-by: James Morris <jmorris@namei.org>

2 files changed, 4 insertions, 4 deletions

diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index c7e65bb30ba0..7b19802cfef4 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -235,8 +235,8 @@ static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid,
         substring_t args[MAX_OPT_ARGS];
         int option;
 
-        *uid = current->uid;
-        *gid = current->gid;
+        *uid = current_uid();
+        *gid = current_gid();
         *pgrp = task_pgrp_nr(current);
 
         *minproto = AUTOFS_MIN_PROTO_VERSION;
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 4b67c2a2d77c..e02cc8ae5eb3 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -391,8 +391,8 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
                 memcpy(&wq->name, &qstr, sizeof(struct qstr));
                 wq->dev = autofs4_get_dev(sbi);
                 wq->ino = autofs4_get_ino(sbi);
-                wq->uid = current->uid;
-                wq->gid = current->gid;
+                wq->uid = current_uid();
+                wq->gid = current_gid();
                 wq->pid = current->pid;
                 wq->tgid = current->tgid;
                 wq->status = -EINTR; /* Status return if interrupted */