kernel/fs/reiserfs/xattr_user.c

   1 #include "reiserfs.h"
   2 #include <linux/errno.h>
   3 #include <linux/fs.h>
   4 #include <linux/pagemap.h>
   5 #include <linux/xattr.h>
   6 #include "xattr.h"
   7 #include <linux/uaccess.h>
   8
   9 static int
  10 user_get(const struct xattr_handler *handler, struct dentry *dentry,
  11          const char *name, void *buffer, size_t size)
  12 {
  13         if (!reiserfs_xattrs_user(dentry->d_sb))
  14                 return -EOPNOTSUPP;
  15         return reiserfs_xattr_get(d_inode(dentry),
  16                                   xattr_full_name(handler, name),
  17                                   buffer, size);
  18 }
  19
  20 static int
  21 user_set(const struct xattr_handler *handler, struct dentry *dentry,
  22          const char *name, const void *buffer, size_t size, int flags)
  23 {
  24         if (!reiserfs_xattrs_user(dentry->d_sb))
  25                 return -EOPNOTSUPP;
  26         return reiserfs_xattr_set(d_inode(dentry),
  27                                   xattr_full_name(handler, name),
  28                                   buffer, size, flags);
  29 }
  30
  31 static size_t user_list(const struct xattr_handler *handler,
  32                         struct dentry *dentry, char *list, size_t list_size,
  33                         const char *name, size_t name_len)
  34 {
  35         const size_t len = name_len + 1;
  36
  37         if (!reiserfs_xattrs_user(dentry->d_sb))
  38                 return 0;
  39         if (list && len <= list_size) {
  40                 memcpy(list, name, name_len);
  41                 list[name_len] = '\0';
  42         }
  43         return len;
  44 }
  45
  46 const struct xattr_handler reiserfs_xattr_user_handler = {
  47         .prefix = XATTR_USER_PREFIX,
  48         .get = user_get,
  49         .set = user_set,
  50         .list = user_list,
  51 };