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 *dentry, const char *name,
  21                                   void *buffer, size_t size)
  22 {
  23         return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED,
  24                                  name, buffer, size);
  25 }
  26
  27 static int jffs2_trusted_setxattr(const struct xattr_handler *handler,
  28                                   struct dentry *dentry, const char *name,
  29                                   const void *buffer, size_t size, int flags)
  30 {
  31         return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED,
  32                                  name, buffer, size, flags);
  33 }
  34
  35 static bool jffs2_trusted_listxattr(struct dentry *dentry)
  36 {
  37         return capable(CAP_SYS_ADMIN);
  38 }
  39
  40 const struct xattr_handler jffs2_trusted_xattr_handler = {
  41         .prefix = XATTR_TRUSTED_PREFIX,
  42         .list = jffs2_trusted_listxattr,
  43         .set = jffs2_trusted_setxattr,
  44         .get = jffs2_trusted_getxattr
  45 };