TOMOYO: Use GFP_NOFS rather than GFP_KERNEL.

[net-next-2.6.git] / security / tomoyo / realpath.c

diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c
index c00df45c7ede899681344086e509c52f4b180bc0..8fe3ee20a18942d0c83f49f79462a7b23952ff8f 100644 (file)
--- a/security/tomoyo/realpath.c
+++ b/security/tomoyo/realpath.c
@@ -88,29 +88,14 @@ int tomoyo_realpath_from_path2(struct path *path, char *newname,
                sp = dentry->d_op->d_dname(dentry, newname + offset,
                                           newname_len - offset);
        } else {
-               /* Taken from d_namespace_path(). */
-               struct path root;
-               struct path ns_root = { };
-               struct path tmp;
+               struct path ns_root = {.mnt = NULL, .dentry = NULL};
 
-               read_lock(&current->fs->lock);
-               root = current->fs->root;
-               path_get(&root);
-               read_unlock(&current->fs->lock);
-               spin_lock(&vfsmount_lock);
-               if (root.mnt && root.mnt->mnt_ns)
-                       ns_root.mnt = mntget(root.mnt->mnt_ns->root);
-               if (ns_root.mnt)
-                       ns_root.dentry = dget(ns_root.mnt->mnt_root);
-               spin_unlock(&vfsmount_lock);
                spin_lock(&dcache_lock);
-               tmp = ns_root;
-               sp = __d_path(path, &tmp, newname, newname_len);
+               /* go to whatever namespace root we are under */
+               sp = __d_path(path, &ns_root, newname, newname_len);
                spin_unlock(&dcache_lock);
-               path_put(&root);
-               path_put(&ns_root);
                /* Prepend "/proc" prefix if using internal proc vfs mount. */
-               if (!IS_ERR(sp) && (path->mnt->mnt_parent == path->mnt) &&
+               if (!IS_ERR(sp) && (path->mnt->mnt_flags & MNT_INTERNAL) &&
                    (path->mnt->mnt_sb->s_magic == PROC_SUPER_MAGIC)) {
                        sp -= 5;
                        if (sp >= newname)
@@ -153,7 +138,7 @@ int tomoyo_realpath_from_path2(struct path *path, char *newname,
  */
 char *tomoyo_realpath_from_path(struct path *path)
 {
-       char *buf = kzalloc(sizeof(struct tomoyo_page_buffer), GFP_KERNEL);
+       char *buf = kzalloc(sizeof(struct tomoyo_page_buffer), GFP_NOFS);
 
        BUILD_BUG_ON(sizeof(struct tomoyo_page_buffer)
                     <= TOMOYO_MAX_PATHNAME_LEN - 1);
@@ -284,7 +269,7 @@ const struct tomoyo_path_info *tomoyo_get_name(const char *name)
                atomic_inc(&ptr->users);
                goto out;
        }
-       ptr = kzalloc(sizeof(*ptr) + len, GFP_KERNEL);
+       ptr = kzalloc(sizeof(*ptr) + len, GFP_NOFS);
        allocated_len = ptr ? ksize(ptr) : 0;
        if (!ptr || (tomoyo_quota_for_policy &&
                     atomic_read(&tomoyo_policy_memory_size) + allocated_len