io/shutdown.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2004-2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6
   7 #include "command.h"
   8 #include "input.h"
   9 #include "init.h"
  10 #include "io.h"
  11
  12 static cmdinfo_t shutdown_cmd;
  13
  14 static int
  15 shutdown_f(
  16         int             argc,
  17         char            **argv)
  18 {
  19         int             c, flag = XFS_FSOP_GOING_FLAGS_NOLOGFLUSH;
  20
  21         while ((c = getopt(argc, argv, "fv")) != -1) {
  22                 switch (c) {
  23                 case 'f':
  24                         flag = XFS_FSOP_GOING_FLAGS_LOGFLUSH;
  25                         break;
  26                 default:
  27                         exitcode = 1;
  28                         return command_usage(&shutdown_cmd);
  29                 }
  30         }
  31
  32         if ((xfsctl(file->name, file->fd, XFS_IOC_GOINGDOWN, &flag)) < 0) {
  33                 perror("XFS_IOC_GOINGDOWN");
  34                 exitcode = 1;
  35                 return 0;
  36         }
  37         return 0;
  38 }
  39
  40 static void
  41 shutdown_help(void)
  42 {
  43         printf(_(
  44 "\n"
  45 " Shuts down the filesystem and prevents any further IO from occurring.\n"
  46 "\n"
  47 " By default, shutdown will not flush completed transactions to disk\n"
  48 " before shutting the filesystem down, simulating a disk failure or crash.\n"
  49 " With -f, the log will be flushed to disk, matching XFS behavior when\n"
  50 " metadata corruption is encountered.\n"
  51 "\n"
  52 " -f -- Flush completed transactions to disk before shut down.\n"
  53 "\n"));
  54 }
  55
  56 void
  57 shutdown_init(void)
  58 {
  59         shutdown_cmd.name = "shutdown";
  60         shutdown_cmd.cfunc = shutdown_f;
  61         shutdown_cmd.argmin = 0;
  62         shutdown_cmd.argmax = 1;
  63         shutdown_cmd.flags = CMD_NOMAP_OK | CMD_FLAG_ONESHOT | CMD_FLAG_FOREIGN_OK;
  64         shutdown_cmd.args = _("[-f]");
  65         shutdown_cmd.help = shutdown_help;
  66         shutdown_cmd.oneline =
  67                 _("shuts down the filesystem where the current file resides");
  68
  69         if (expert)
  70                 add_command(&shutdown_cmd);
  71 }