fs/ext4/xattr_trusted.c

   1 /*
   2  * linux/fs/ext4/xattr_trusted.c
   3  * Handler for trusted extended attributes.
   4  *
   5  * Copyright (C) 2003 by Andreas Gruenbacher, <[email protected]>
   6  */
   7
   8 #include <linux/string.h>
   9 #include <linux/capability.h>
  10 #include <linux/fs.h>
  11 #include "ext4_jbd2.h"
  12 #include "ext4.h"
  13 #include "xattr.h"
  14
  15 static bool
  16 ext4_xattr_trusted_list(struct dentry *dentry)
  17 {
  18         return capable(CAP_SYS_ADMIN);
  19 }
  20
  21 static int
  22 ext4_xattr_trusted_get(const struct xattr_handler *handler,
  23                        struct dentry *dentry, const char *name, void *buffer,
  24                        size_t size)
  25 {
  26         return ext4_xattr_get(d_inode(dentry), EXT4_XATTR_INDEX_TRUSTED,
  27                               name, buffer, size);
  28 }
  29
  30 static int
  31 ext4_xattr_trusted_set(const struct xattr_handler *handler,
  32                        struct dentry *dentry, const char *name,
  33                        const void *value, size_t size, int flags)
  34 {
  35         return ext4_xattr_set(d_inode(dentry), EXT4_XATTR_INDEX_TRUSTED,
  36                               name, value, size, flags);
  37 }
  38
  39 const struct xattr_handler ext4_xattr_trusted_handler = {
  40         .prefix = XATTR_TRUSTED_PREFIX,
  41         .list   = ext4_xattr_trusted_list,
  42         .get    = ext4_xattr_trusted_get,
  43         .set    = ext4_xattr_trusted_set,
  44 };