usr/src/boot/sys/boot/common/zfs_cmd.c

   1 /*
   2  * Copyright (c) 2018 Warner Losh <imp@freebd.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28
  29 #include <stand.h>
  30 #include <stddef.h>
  31 #include <sys/disk.h>
  32 #include <sys/reboot.h>
  33
  34 #include "bootstrap.h"
  35
  36 #include "libzfs.h"
  37
  38 #ifndef BOOT2
  39 COMMAND_SET(lszfs, "lszfs", "list child datasets of a zfs dataset",
  40             command_lszfs);
  41
  42 static int
  43 command_lszfs(int argc, char *argv[])
  44 {
  45         int err;
  46
  47         if (argc != 2) {
  48                 command_errmsg = "a single dataset must be supplied";
  49                 return (CMD_ERROR);
  50         }
  51
  52         err = zfs_list(argv[1]);
  53         if (err != 0) {
  54                 command_errmsg = strerror(err);
  55                 return (CMD_ERROR);
  56         }
  57         return (CMD_OK);
  58 }
  59 #endif
  60
  61 uint64_t
  62 ldi_get_size(void *priv)
  63 {
  64         int fd = (uintptr_t) priv;
  65         uint64_t size;
  66
  67         ioctl(fd, DIOCGMEDIASIZE, &size);
  68         return (size);
  69 }