fs/jffs2/xattr_trusted.c

   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright © 2006  NEC Corporation
   5  *
   6  * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
   7  *
   8  * For licensing information, see the file 'LICENCE' in this directory.
   9  *
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/fs.h>
  14 #include <linux/jffs2.h>
  15 #include <linux/xattr.h>
  16 #include <linux/mtd/mtd.h>
  17 #include "nodelist.h"
  18
  19 static int jffs2_trusted_getxattr(const struct xattr_handler *handler,
  20                                   struct dentry *unused, struct inode *inode,
  21                                   const char *name, void *buffer, size_t size)
  22 {
  23         return do_jffs2_getxattr(inode, JFFS2_XPREFIX_TRUSTED,
  24                                  name, buffer, size);
  25 }
  26
  27 static int jffs2_trusted_setxattr(const struct xattr_handler *handler,
  28                                   struct user_namespace *mnt_userns,
  29                                   struct dentry *unused, struct inode *inode,
  30                                   const char *name, const void *buffer,
  31                                   size_t size, int flags)
  32 {
  33         return do_jffs2_setxattr(inode, JFFS2_XPREFIX_TRUSTED,
  34                                  name, buffer, size, flags);
  35 }
  36
  37 static bool jffs2_trusted_listxattr(struct dentry *dentry)
  38 {
  39         return capable(CAP_SYS_ADMIN);
  40 }
  41
  42 const struct xattr_handler jffs2_trusted_xattr_handler = {
  43         .prefix = XATTR_TRUSTED_PREFIX,
  44         .list = jffs2_trusted_listxattr,
  45         .set = jffs2_trusted_setxattr,
  46         .get = jffs2_trusted_getxattr
  47 };