LXR linux/fs/reiserfs/xattr

   1#include "reiserfs.h"
   2#include <linux/capability.h>
   3#include <linux/errno.h>
   4#include <linux/fs.h>
   5#include <linux/pagemap.h>
   6#include <linux/xattr.h>
   7#include "xattr.h"
   8#include <linux/uaccess.h>
   9
  10static int
  11trusted_get(const struct xattr_handler *handler, struct dentry *unused,
  12            struct inode *inode, const char *name, void *buffer, size_t size)
  13{
  14        if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
  15                return -EPERM;
  16
  17        return reiserfs_xattr_get(inode, xattr_full_name(handler, name),
  18                                  buffer, size);
  19}
  20
  21static int
  22trusted_set(const struct xattr_handler *handler, struct dentry *unused,
  23            struct inode *inode, const char *name, const void *buffer,
  24            size_t size, int flags)
  25{
  26        if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
  27                return -EPERM;
  28
  29        return reiserfs_xattr_set(inode,
  30                                  xattr_full_name(handler, name),
  31                                  buffer, size, flags);
  32}
  33
  34static bool trusted_list(struct dentry *dentry)
  35{
  36        return capable(CAP_SYS_ADMIN) && !IS_PRIVATE(d_inode(dentry));
  37}
  38
  39const struct xattr_handler reiserfs_xattr_trusted_handler = {
  40        .prefix = XATTR_TRUSTED_PREFIX,
  41        .get = trusted_get,
  42        .set = trusted_set,
  43        .list = trusted_list,
  44};
  45