stand/common/zfs_cmd.c

   1 /*-
   2  * Copyright (c) 2018 M. Warner Losh <imp@FreeBSD.org>
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  */
  25
  26 /*
  27  * MD bootstrap main() and assorted miscellaneous
  28  * commands.
  29  */
  30
  31 #include <stand.h>
  32 #include <stddef.h>
  33 #include <sys/disk.h>
  34 #include <sys/reboot.h>
  35
  36 #include "bootstrap.h"
  37 #include "libzfs.h"
  38
  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
  60 COMMAND_SET(reloadbe, "reloadbe", "refresh the list of ZFS Boot Environments",
  61             command_reloadbe);
  62
  63 static int
  64 command_reloadbe(int argc, char *argv[])
  65 {
  66         int err;
  67         char *root;
  68
  69         if (argc > 2) {
  70                 command_errmsg = "wrong number of arguments";
  71                 return (CMD_ERROR);
  72         }
  73
  74         if (argc == 2) {
  75                 err = zfs_bootenv(argv[1]);
  76         } else {
  77                 root = getenv("zfs_be_root");
  78                 if (root == NULL) {
  79                         /* There does not appear to be a ZFS pool here, exit without error */
  80                         return (CMD_OK);
  81                 }
  82                 err = zfs_bootenv(root);
  83         }
  84
  85         if (err != 0) {
  86                 command_errmsg = strerror(err);
  87                 return (CMD_ERROR);
  88         }
  89
  90         return (CMD_OK);
  91 }
  92
  93 uint64_t
  94 ldi_get_size(void *priv)
  95 {
  96         int fd = (uintptr_t) priv;
  97         uint64_t size;
  98
  99         ioctl(fd, DIOCGMEDIASIZE, &size);
 100         return (size);
 101 }