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
  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(d_inode(dentry), name, buffer, size);
  19 }
  20
  21 static int
  22 user_set(const struct xattr_handler *handler, struct dentry *dentry,
  23          const char *name, const void *buffer, size_t size, int 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(d_inode(dentry), name, buffer, size, flags);
  31 }
  32
  33 static size_t user_list(const struct xattr_handler *handler,
  34                         struct dentry *dentry, char *list, size_t list_size,
  35                         const char *name, size_t name_len)
  36 {
  37         const size_t len = name_len + 1;
  38
  39         if (!reiserfs_xattrs_user(dentry->d_sb))
  40                 return 0;
  41         if (list && len <= list_size) {
  42                 memcpy(list, name, name_len);
  43                 list[name_len] = '\0';
  44         }
  45         return len;
  46 }
  47
  48 const struct xattr_handler reiserfs_xattr_user_handler = {
  49         .prefix = XATTR_USER_PREFIX,
  50         .get = user_get,
  51         .set = user_set,
  52         .list = user_list,
  53 };