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 dentry *dentry, const char *name, void *buffer, size_t size,
  11          int handler_flags)
  12 {
  13
  14         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  15                 return -EINVAL;
  16         if (!reiserfs_xattrs_user(dentry->d_sb))
  17                 return -EOPNOTSUPP;
  18         return reiserfs_xattr_get(dentry->d_inode, name, buffer, size);
  19 }
  20
  21 static int
  22 user_set(struct dentry *dentry, const char *name, const void *buffer,
  23          size_t size, int flags, int handler_flags)
  24 {
  25         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  26                 return -EINVAL;
  27
  28         if (!reiserfs_xattrs_user(dentry->d_sb))
  29                 return -EOPNOTSUPP;
  30         return reiserfs_xattr_set(dentry->d_inode, name, buffer, size, flags);
  31 }
  32
  33 static size_t user_list(struct dentry *dentry, char *list, size_t list_size,
  34                         const char *name, size_t name_len, int handler_flags)
  35 {
  36         const size_t len = name_len + 1;
  37
  38         if (!reiserfs_xattrs_user(dentry->d_sb))
  39                 return 0;
  40         if (list && len <= list_size) {
  41                 memcpy(list, name, name_len);
  42                 list[name_len] = '\0';
  43         }
  44         return len;
  45 }
  46
  47 struct xattr_handler reiserfs_xattr_user_handler = {
  48         .prefix = XATTR_USER_PREFIX,
  49         .get = user_get,
  50         .set = user_set,
  51         .list = user_list,
  52 };