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 #define XATTR_USER_PREFIX "user."
  14
  15 static int
  16 user_get(struct inode *inode, const char *name, void *buffer, size_t size)
  17 {
  18
  19         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  20                 return -EINVAL;
  21         if (!reiserfs_xattrs_user(inode->i_sb))
  22                 return -EOPNOTSUPP;
  23         return reiserfs_xattr_get(inode, name, buffer, size);
  24 }
  25
  26 static int
  27 user_set(struct inode *inode, const char *name, const void *buffer,
  28          size_t size, int flags)
  29 {
  30
  31         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  32                 return -EINVAL;
  33
  34         if (!reiserfs_xattrs_user(inode->i_sb))
  35                 return -EOPNOTSUPP;
  36         return reiserfs_xattr_set(inode, name, buffer, size, flags);
  37 }
  38
  39 static int user_del(struct inode *inode, const char *name)
  40 {
  41         if (strlen(name) < sizeof(XATTR_USER_PREFIX))
  42                 return -EINVAL;
  43
  44         if (!reiserfs_xattrs_user(inode->i_sb))
  45                 return -EOPNOTSUPP;
  46         return 0;
  47 }
  48
  49 static int
  50 user_list(struct inode *inode, const char *name, int namelen, char *out)
  51 {
  52         int len = namelen;
  53         if (!reiserfs_xattrs_user(inode->i_sb))
  54                 return 0;
  55
  56         if (out)
  57                 memcpy(out, name, len);
  58
  59         return len;
  60 }
  61
  62 struct reiserfs_xattr_handler user_handler = {
  63         .prefix = XATTR_USER_PREFIX,
  64         .get = user_get,
  65         .set = user_set,
  66         .del = user_del,
  67         .list = user_list,
  68 };