CRED: Wrap task credential accesses in the CIFS 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: Steve French <sfrench@samba.org>
Cc: linux-cifs-client@lists.samba.org
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index ff8c68de4a92..8b7305e73d7e 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1143,11 +1143,11 @@ mkdir_get_info:
                                 .device = 0,
                         };
                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
-                                args.uid = (__u64)current->fsuid;
+                                args.uid = (__u64)current_fsuid();
                                 if (inode->i_mode & S_ISGID)
                                         args.gid = (__u64)inode->i_gid;
                                 else
-                                        args.gid = (__u64)current->fsgid;
+                                        args.gid = (__u64)current_fsgid();
                         } else {
                                 args.uid = NO_CHANGE_64;
                                 args.gid = NO_CHANGE_64;
@@ -1184,13 +1184,13 @@ mkdir_get_info:
                                 if (cifs_sb->mnt_cifs_flags &
                                      CIFS_MOUNT_SET_UID) {
                                         direntry->d_inode->i_uid =
-                                                current->fsuid;
+                                                current_fsuid();
                                         if (inode->i_mode & S_ISGID)
                                                 direntry->d_inode->i_gid =
                                                         inode->i_gid;
                                         else
                                                 direntry->d_inode->i_gid =
-                                                        current->fsgid;
+                                                        current_fsgid();
                                 }
                         }
                 }