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 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
  10 # include <linux/reiserfs_acl.h>
  11 #endif
  12
  13 static int
  14 user_get(struct inode *inode, const char *name, void *buffer, size_t size)
  15 {
  16
  17         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  18                 return -EINVAL;
  19         if (!reiserfs_xattrs_user(inode->i_sb))
  20                 return -EOPNOTSUPP;
  21         return reiserfs_xattr_get(inode, name, buffer, size);
  22 }
  23
  24 static int
  25 user_set(struct inode *inode, const char *name, const void *buffer,
  26          size_t size, int flags)
  27 {
  28
  29         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  30                 return -EINVAL;
  31
  32         if (!reiserfs_xattrs_user(inode->i_sb))
  33                 return -EOPNOTSUPP;
  34         return reiserfs_xattr_set(inode, name, buffer, size, flags);
  35 }
  36
  37 static int user_del(struct inode *inode, const char *name)
  38 {
  39         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  40                 return -EINVAL;
  41
  42         if (!reiserfs_xattrs_user(inode->i_sb))
  43                 return -EOPNOTSUPP;
  44         return 0;
  45 }
  46
  47 static int
  48 user_list(struct inode *inode, const char *name, int namelen, char *out)
  49 {
  50         int len = namelen;
  51         if (!reiserfs_xattrs_user(inode->i_sb))
  52                 return 0;
  53
  54         if (out)
  55                 memcpy(out, name, len);
  56
  57         return len;
  58 }
  59
  60 struct reiserfs_xattr_handler user_handler = {
  61         .prefix = XATTR_USER_PREFIX,
  62         .get = user_get,
  63         .set = user_set,
  64         .del = user_del,
  65         .list = user_list,
  66 };