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, 6 insertions, 6 deletions

diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index e962e75e6f7b..2f02c52db666 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -235,11 +235,11 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                         };
 
                         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;
@@ -271,13 +271,13 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
                                 if ((oplock & CIFS_CREATE_ACTION) &&
                                     (cifs_sb->mnt_cifs_flags &
                                      CIFS_MOUNT_SET_UID)) {
-                                        newinode->i_uid = current->fsuid;
+                                        newinode->i_uid = current_fsuid();
                                         if (inode->i_mode & S_ISGID)
                                                 newinode->i_gid =
                                                         inode->i_gid;
                                         else
                                                 newinode->i_gid =
-                                                        current->fsgid;
+                                                        current_fsgid();
                                 }
                         }
                 }
@@ -375,8 +375,8 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
                         .device = device_number,
                 };
                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
-                        args.uid = (__u64) current->fsuid;
-                        args.gid = (__u64) current->fsgid;
+                        args.uid = (__u64) current_fsuid();
+                        args.gid = (__u64) current_fsgid();
                 } else {
                         args.uid = NO_CHANGE_64;
                         args.gid = NO_CHANGE_64;