linux/fs/reiserfs/xattr_user.c
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   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 <asm/uaccess.h>
   8
   9static int
  10user_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
  21static int
  22user_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
  33static 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
  47const 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};
  53
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