fs/reiserfs/xattr_user.c

   1 #include <linux/reiserfs_fs.h>
   2 #include <linux/errno.h>
   3 #include <linux/fs.h>
   4 #include <linux/pagemap.h>
   5 #include <linux/xattr.h>
   6 #include <linux/reiserfs_xattr.h>
   7 #include <asm/uaccess.h>
   8
   9 static int
  10 user_get(struct inode *inode, const char *name, void *buffer, size_t size)
  11 {
  12
  13         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  14                 return -EINVAL;
  15         if (!reiserfs_xattrs_user(inode->i_sb))
  16                 return -EOPNOTSUPP;
  17         return reiserfs_xattr_get(inode, name, buffer, size);
  18 }
  19
  20 static int
  21 user_set(struct inode *inode, const char *name, const void *buffer,
  22          size_t size, int flags)
  23 {
  24         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  25                 return -EINVAL;
  26
  27         if (!reiserfs_xattrs_user(inode->i_sb))
  28                 return -EOPNOTSUPP;
  29         return reiserfs_xattr_set(inode, name, buffer, size, flags);
  30 }
  31
  32 static size_t user_list(struct inode *inode, 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(inode->i_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 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 };