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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2012 Red Hat, Inc.
* All Rights Reserved.
*/
#include "command.h"
#include "input.h"
#include "init.h"
#include "io.h"
static cmdinfo_t sync_range_cmd;
static void
sync_range_help(void)
{
printf(_(
"\n"
" Trigger specific writeback commands on a range of the current file\n"
"\n"
" With no options, the SYNC_FILE_RANGE_WRITE is implied.\n"
" -a -- wait for IO to finish after writing (SYNC_FILE_RANGE_WAIT_AFTER).\n"
" -b -- wait for IO to finish before writing (SYNC_FILE_RANGE_WAIT_BEFORE).\n"
" -w -- write dirty data in range (SYNC_FILE_RANGE_WRITE).\n"
"\n"));
}
static int
sync_range_f(
int argc,
char **argv)
{
off64_t offset = 0, length = 0;
int c, sync_mode = 0;
size_t blocksize, sectsize;
while ((c = getopt(argc, argv, "abw")) != EOF) {
switch (c) {
case 'a':
sync_mode = SYNC_FILE_RANGE_WAIT_AFTER;
break;
case 'b':
sync_mode = SYNC_FILE_RANGE_WAIT_BEFORE;
break;
case 'w':
sync_mode = SYNC_FILE_RANGE_WRITE;
break;
default:
return command_usage(&sync_range_cmd);
}
}
/* default to just starting writeback on the range */
if (!sync_mode)
sync_mode = SYNC_FILE_RANGE_WRITE;
if (optind != argc - 2)
return command_usage(&sync_range_cmd);
init_cvtnum(&blocksize, §size);
offset = cvtnum(blocksize, sectsize, argv[optind]);
if (offset < 0) {
printf(_("non-numeric offset argument -- %s\n"),
argv[optind]);
return 0;
}
optind++;
length = cvtnum(blocksize, sectsize, argv[optind]);
if (length < 0) {
printf(_("non-numeric length argument -- %s\n"),
argv[optind]);
return 0;
}
if (sync_file_range(file->fd, offset, length, sync_mode) < 0) {
perror("sync_file_range");
return 0;
}
return 0;
}
void
sync_range_init(void)
{
sync_range_cmd.name = "sync_range";
sync_range_cmd.cfunc = sync_range_f;
sync_range_cmd.argmin = 2;
sync_range_cmd.argmax = -1;
sync_range_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
sync_range_cmd.args = _("[-abw] off len");
sync_range_cmd.oneline = _("Control writeback on a range of a file");
sync_range_cmd.help = sync_range_help;
add_command(&sync_range_cmd);
}
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