CRED: Wrap task credential accesses in the hugetlbfs 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: William Irwin <wli@holomorphy.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 8 insertions, 8 deletions

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 61edc701b0e6..08ad76c79b49 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -551,9 +551,9 @@ static int hugetlbfs_mknod(struct inode *dir,
                 if (S_ISDIR(mode))
                         mode |= S_ISGID;
         } else {
-                gid = current->fsgid;
+                gid = current_fsgid();
         }
-        inode = hugetlbfs_get_inode(dir->i_sb, current->fsuid, gid, mode, dev);
+        inode = hugetlbfs_get_inode(dir->i_sb, current_fsuid(), gid, mode, dev);
         if (inode) {
                 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
                 d_instantiate(dentry, inode);
@@ -586,9 +586,9 @@ static int hugetlbfs_symlink(struct inode *dir,
         if (dir->i_mode & S_ISGID)
                 gid = dir->i_gid;
         else
-                gid = current->fsgid;
+                gid = current_fsgid();
 
-        inode = hugetlbfs_get_inode(dir->i_sb, current->fsuid,
+        inode = hugetlbfs_get_inode(dir->i_sb, current_fsuid(),
                                         gid, S_IFLNK|S_IRWXUGO, 0);
         if (inode) {
                 int l = strlen(symname)+1;
@@ -854,8 +854,8 @@ hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
 
         config.nr_blocks = -1; /* No limit on size by default */
         config.nr_inodes = -1; /* No limit on number of inodes by default */
-        config.uid = current->fsuid;
-        config.gid = current->fsgid;
+        config.uid = current_fsuid();
+        config.gid = current_fsgid();
         config.mode = 0755;
         config.hstate = &default_hstate;
         ret = hugetlbfs_parse_options(data, &config);
@@ -970,8 +970,8 @@ struct file *hugetlb_file_setup(const char *name, size_t size)
                 goto out_shm_unlock;
 
         error = -ENOSPC;
-        inode = hugetlbfs_get_inode(root->d_sb, current->fsuid,
-                                current->fsgid, S_IFREG | S_IRWXUGO, 0);
+        inode = hugetlbfs_get_inode(root->d_sb, current_fsuid(),
+                                current_fsgid(), S_IFREG | S_IRWXUGO, 0);
         if (!inode)
                 goto out_dentry;