[thirdparty/util-linux.git] / sys-utils / blkzone.c

/*
 * blkzone.c -- the block device zone commands
 *
 * Copyright (C) 2015,2016 Seagate Technology PLC
 * Written by Shaun Tancheff <shaun.tancheff@seagate.com>
 *
 * Copyright (C) 2017 Karel Zak <kzak@redhat.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <fcntl.h>
#include <limits.h>
#include <getopt.h>
#include <time.h>

#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <linux/fs.h>
#include <linux/blkzoned.h>

#include "nls.h"
#include "strutils.h"
#include "xalloc.h"
#include "c.h"
#include "closestream.h"
#include "blkdev.h"
#include "sysfs.h"
#include "optutils.h"

struct blkzone_control;

static int blkzone_report(struct blkzone_control *ctl);
static int blkzone_reset(struct blkzone_control *ctl);

struct blkzone_command {
	const char *name;
	int (*handler)(struct blkzone_control *);
	const char *help;
};

struct blkzone_control {
	const char *devname;
	const struct blkzone_command *command;

	uint64_t total_sectors;
	int secsize;

	uint64_t offset;
	uint64_t length;
	uint32_t count;

	unsigned int verbose : 1;
};

static const struct blkzone_command commands[] = {
	{ "report",	blkzone_report, N_("Report zone information about the given device") },
	{ "reset",	blkzone_reset,  N_("Reset a range of zones.") }
};

static const struct blkzone_command *name_to_command(const char *name)
{
	size_t i;

	for (i = 0; i < ARRAY_SIZE(commands); i++) {
		if (strcmp(commands[i].name, name) == 0)
			return &commands[i];
	}

	return NULL;
}

static int init_device(struct blkzone_control *ctl, int mode)
{
	struct stat sb;
	int fd;

	fd = open(ctl->devname, mode);
	if (fd < 0)
		err(EXIT_FAILURE, _("cannot open %s"), ctl->devname);

	if (fstat(fd, &sb) == -1)
		err(EXIT_FAILURE, _("stat of %s failed"), ctl->devname);
	if (!S_ISBLK(sb.st_mode))
		errx(EXIT_FAILURE, _("%s: not a block device"), ctl->devname);

	if (blkdev_get_sectors(fd, (unsigned long long *) &ctl->total_sectors))
		err(EXIT_FAILURE, _("%s: blkdev_get_sectors ioctl failed"), ctl->devname);

	if (blkdev_get_sector_size(fd, &ctl->secsize))
		err(EXIT_FAILURE, _("%s: BLKSSZGET ioctl failed"), ctl->devname);

	return fd;
}

/*
 * Get the device zone size indicated by chunk sectors).
 */
static unsigned long blkdev_chunk_sectors(const char *dname)
{
	struct path_cxt *pc = NULL;
	dev_t devno = sysfs_devname_to_devno(dname);
	dev_t disk;
	uint64_t sz = 0;
	int rc;

	/*
	 * Mapping /dev/sdXn -> /sys/block/sdX to read the chunk_size entry.
	 * This method masks off the partition specified by the minor device
	 * component.
	 */
	pc = ul_new_sysfs_path(devno, NULL, NULL);
	if (!pc)
		return 0;

	rc = sysfs_blkdev_get_wholedisk(pc, NULL, 0, &disk);
	if (rc != 0)
		goto done;

	/* if @pc is not while-disk device, switch to disk */
	if (devno != disk) {
		rc = sysfs_blkdev_init_path(pc, disk, NULL);
		if (rc != 0)
			goto done;
	}

	rc = ul_path_read_u64(pc, &sz, "queue/chunk_sectors");
done:
	ul_unref_path(pc);
	return rc == 0 ? sz : 0;
}

/*
 * blkzone report
 */
#define DEF_REPORT_LEN		(1U << 12) /* 4k zones per report (256k kzalloc) */

static const char *type_text[] = {
	"RESERVED",
	"CONVENTIONAL",
	"SEQ_WRITE_REQUIRED",
	"SEQ_WRITE_PREFERRED",
};

static const char *condition_str[] = {
	"nw", /* Not write pointer */
	"em", /* Empty */
	"oi", /* Implicitly opened */
	"oe", /* Explicitly opened */
	"cl", /* Closed */
	"x5", "x6", "x7", "x8", "x9", "xA", "xB", "xC", /* xN: reserved */
	"ro", /* Read only */
	"fu", /* Full */
	"of"  /* Offline */
};

static int blkzone_report(struct blkzone_control *ctl)
{
	struct blk_zone_report *zi;
	unsigned long zonesize;
	uint32_t i, nr_zones;
	int fd;

	fd = init_device(ctl, O_RDONLY);

	if (ctl->offset > ctl->total_sectors)
		errx(EXIT_FAILURE, _("%s: offset is greater than device size"), ctl->devname);

	zonesize = blkdev_chunk_sectors(ctl->devname);
	if (!zonesize)
		errx(EXIT_FAILURE, _("%s: unable to determine zone size"), ctl->devname);

	if (ctl->count)
		nr_zones = ctl->count;
	else if (ctl->length)
		nr_zones = (ctl->length + zonesize - 1) / zonesize;
	else
		nr_zones = 1 + (ctl->total_sectors - ctl->offset) / zonesize;

	zi = xmalloc(sizeof(struct blk_zone_report) +
		     (DEF_REPORT_LEN * sizeof(struct blk_zone)));

	while (nr_zones && ctl->offset < ctl->total_sectors) {

		zi->nr_zones = min(nr_zones, DEF_REPORT_LEN);
		zi->sector = ctl->offset;

		if (ioctl(fd, BLKREPORTZONE, zi) == -1)
			err(EXIT_FAILURE, _("%s: BLKREPORTZONE ioctl failed"), ctl->devname);

		if (ctl->verbose)
			printf(_("Found %d zones from 0x%"PRIx64"\n"),
				zi->nr_zones, ctl->offset);

		if (!zi->nr_zones) {
			nr_zones = 0;
			break;
		}

		for (i = 0; i < zi->nr_zones; i++) {
			const struct blk_zone *entry = &zi->zones[i];
			unsigned int type = entry->type;
			uint64_t start = entry->start;
			uint64_t wp = entry->wp;
			uint8_t cond = entry->cond;
			uint64_t len = entry->len;

			if (!len) {
				nr_zones = 0;
				break;
			}

			printf(_("  start: 0x%09"PRIx64", len 0x%06"PRIx64", wptr 0x%06"PRIx64
			 	" reset:%u non-seq:%u, zcond:%2u(%s) [type: %u(%s)]\n"),
				start, len, (type == 0x1) ? 0 : wp - start,
				entry->reset, entry->non_seq,
				cond, condition_str[cond & (ARRAY_SIZE(condition_str) - 1)],
				type, type_text[type]);

			nr_zones--;
			ctl->offset = start + len;

		}

	}

	free(zi);
	close(fd);

	return 0;
}

/*
 * blkzone reset
 */
static int blkzone_reset(struct blkzone_control *ctl)
{
	struct blk_zone_range za = { .sector = 0 };
	unsigned long zonesize;
	uint64_t zlen;
	int fd;

	zonesize = blkdev_chunk_sectors(ctl->devname);
	if (!zonesize)
		errx(EXIT_FAILURE, _("%s: unable to determine zone size"), ctl->devname);

	fd = init_device(ctl, O_WRONLY);

	if (ctl->offset & (zonesize - 1))
		errx(EXIT_FAILURE, _("%s: offset %" PRIu64 " is not aligned "
			"to zone size %lu"),
			ctl->devname, ctl->offset, zonesize);

	if (ctl->offset > ctl->total_sectors)
		errx(EXIT_FAILURE, _("%s: offset is greater than device size"), ctl->devname);

	if (ctl->count)
		zlen = ctl->count * zonesize;
	else if (ctl->length)
		zlen = ctl->length;
	else
		zlen = ctl->total_sectors;
	if (ctl->offset + zlen > ctl->total_sectors)
		zlen = ctl->total_sectors - ctl->offset;

	if (ctl->length &&
	    (zlen & (zonesize - 1)) &&
	    ctl->offset + zlen != ctl->total_sectors)
		errx(EXIT_FAILURE, _("%s: number of sectors %" PRIu64 " is not aligned "
			"to zone size %lu"),
			ctl->devname, ctl->length, zonesize);

	za.sector = ctl->offset;
	za.nr_sectors = zlen;

	if (ioctl(fd, BLKRESETZONE, &za) == -1)
		err(EXIT_FAILURE, _("%s: BLKRESETZONE ioctl failed"), ctl->devname);
	else if (ctl->verbose)
		printf(_("%s: successfully reset in range from %" PRIu64 ", to %" PRIu64),
			ctl->devname,
			ctl->offset,
			ctl->offset + zlen);
	close(fd);
	return 0;
}

static void __attribute__((__noreturn__)) usage(void)
{
	FILE *out = stdout;
	size_t i;

	fputs(USAGE_HEADER, out);
	fprintf(out, _(" %s <command> [options] <device>\n"), program_invocation_short_name);

	fputs(USAGE_SEPARATOR, out);
	fputs(_("Run zone command on the given block device.\n"), out);

	fputs(USAGE_COMMANDS, out);
	for (i = 0; i < ARRAY_SIZE(commands); i++)
		fprintf(out, " %-11s  %s\n", commands[i].name, _(commands[i].help));

	fputs(USAGE_OPTIONS, out);
	fputs(_(" -o, --offset <sector>  start sector of zone to act (in 512-byte sectors)\n"), out);
	fputs(_(" -l, --length <sectors> maximum sectors to act (in 512-byte sectors)\n"), out);
	fputs(_(" -c, --count <number>   maximum number of zones\n"), out);
	fputs(_(" -v, --verbose          display more details\n"), out);
	fputs(USAGE_SEPARATOR, out);
	printf(USAGE_HELP_OPTIONS(24));

	printf(USAGE_MAN_TAIL("blkzone(8)"));
	exit(EXIT_SUCCESS);
}

int main(int argc, char **argv)
{
	int c;
	struct blkzone_control ctl = {
		.devname = NULL,
		.offset = 0,
		.count = 0,
		.length = 0
	};

	static const struct option longopts[] = {
	    { "help",    no_argument,       NULL, 'h' },
	    { "count",   required_argument, NULL, 'c' }, /* max #of zones to operate on */
	    { "length",  required_argument, NULL, 'l' }, /* max of sectors to operate on */
	    { "offset",  required_argument, NULL, 'o' }, /* starting LBA */
	    { "verbose", no_argument,       NULL, 'v' },
	    { "version", no_argument,       NULL, 'V' },
	    { NULL, 0, NULL, 0 }
	};
	static const ul_excl_t excl[] = {       /* rows and cols in ASCII order */
		{ 'c', 'l' },
		{ 0 }
	};
	int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;


	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);
	atexit(close_stdout);

	if (argc >= 2 && *argv[1] != '-') {
		ctl.command = name_to_command(argv[1]);
		if (!ctl.command)
			errx(EXIT_FAILURE, _("%s is not valid command name"), argv[1]);
		argv++;
		argc--;
	}

	while ((c = getopt_long(argc, argv, "hc:l:o:vV", longopts, NULL)) != -1) {

		err_exclusive_options(c, longopts, excl, excl_st);

		switch (c) {
		case 'h':
			usage();
			break;
		case 'c':
			ctl.count = strtou32_or_err(optarg,
					_("failed to parse number of zones"));
			break;
		case 'l':
			ctl.length = strtosize_or_err(optarg,
					_("failed to parse number of sectors"));
			break;
		case 'o':
			ctl.offset = strtosize_or_err(optarg,
					_("failed to parse zone offset"));
			break;
		case 'v':
			ctl.verbose = 1;
			break;
		case 'V':
			printf(UTIL_LINUX_VERSION);
			return EXIT_SUCCESS;
		default:
			errtryhelp(EXIT_FAILURE);
		}
	}

	if (!ctl.command)
		errx(EXIT_FAILURE, _("no command specified"));

	if (optind == argc)
		errx(EXIT_FAILURE, _("no device specified"));
	ctl.devname = argv[optind++];

	if (optind != argc)
		errx(EXIT_FAILURE,_("unexpected number of arguments"));

	if (ctl.command->handler(&ctl) < 0)
		return EXIT_FAILURE;

	return EXIT_SUCCESS;

}
Commit	Line	Data
1ad8ef91 KZ	1	/*
	2	* blkzone.c -- the block device zone commands
	3	*
	4	* Copyright (C) 2015,2016 Seagate Technology PLC
	5	* Written by Shaun Tancheff <shaun.tancheff@seagate.com>
	6	*
	7	* Copyright (C) 2017 Karel Zak <kzak@redhat.com>
	8	*
	9	* This program is free software: you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation, either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	21	*/
	22	#include <string.h>
	23	#include <unistd.h>
	24	#include <stdlib.h>
	25	#include <stdio.h>
	26	#include <stdint.h>
	27	#include <fcntl.h>
	28	#include <limits.h>
	29	#include <getopt.h>
	30	#include <time.h>
	31
	32	#include <sys/ioctl.h>
	33	#include <sys/stat.h>
	34	#include <sys/time.h>
	35	#include <linux/fs.h>
	36	#include <linux/blkzoned.h>
	37
	38	#include "nls.h"
	39	#include "strutils.h"
	40	#include "xalloc.h"
	41	#include "c.h"
	42	#include "closestream.h"
	43	#include "blkdev.h"
	44	#include "sysfs.h"
c16970f7	45	#include "optutils.h"
1ad8ef91 KZ	46
	47	struct blkzone_control;
	48
	49	static int blkzone_report(struct blkzone_control *ctl);
	50	static int blkzone_reset(struct blkzone_control *ctl);
	51
	52	struct blkzone_command {
	53	const char *name;
	54	int (handler)(struct blkzone_control );
	55	const char *help;
	56	};
	57
	58	struct blkzone_control {
	59	const char *devname;
	60	const struct blkzone_command *command;
	61
	62	uint64_t total_sectors;
	63	int secsize;
	64
	65	uint64_t offset;
	66	uint64_t length;
f1b8b84d	67	uint32_t count;
1ad8ef91 KZ	68
	69	unsigned int verbose : 1;
	70	};
	71
	72	static const struct blkzone_command commands[] = {
	73	{ "report", blkzone_report, N_("Report zone information about the given device") },
	74	{ "reset", blkzone_reset, N_("Reset a range of zones.") }
	75	};
	76
	77	static const struct blkzone_command name_to_command(const char name)
	78	{
	79	size_t i;
	80
	81	for (i = 0; i < ARRAY_SIZE(commands); i++) {
	82	if (strcmp(commands[i].name, name) == 0)
	83	return &commands[i];
	84	}
	85
	86	return NULL;
	87	}
	88
	89	static int init_device(struct blkzone_control *ctl, int mode)
	90	{
	91	struct stat sb;
	92	int fd;
	93
	94	fd = open(ctl->devname, mode);
	95	if (fd < 0)
	96	err(EXIT_FAILURE, _("cannot open %s"), ctl->devname);
	97
	98	if (fstat(fd, &sb) == -1)
	99	err(EXIT_FAILURE, _("stat of %s failed"), ctl->devname);
	100	if (!S_ISBLK(sb.st_mode))
	101	errx(EXIT_FAILURE, _("%s: not a block device"), ctl->devname);
	102
	103	if (blkdev_get_sectors(fd, (unsigned long long *) &ctl->total_sectors))
	104	err(EXIT_FAILURE, _("%s: blkdev_get_sectors ioctl failed"), ctl->devname);
	105
	106	if (blkdev_get_sector_size(fd, &ctl->secsize))
	107	err(EXIT_FAILURE, _("%s: BLKSSZGET ioctl failed"), ctl->devname);
	108
	109	return fd;
	110	}
	111
6e1958d8 DLM	112	/*
	113	* Get the device zone size indicated by chunk sectors).
	114	*/
	115	static unsigned long blkdev_chunk_sectors(const char *dname)
	116	{
4448b3ab KZ	117	struct path_cxt *pc = NULL;
4448b3ab KZ	118	dev_t devno = sysfs_devname_to_devno(dname);
ddf287b4	119	dev_t disk;
4448b3ab	120	uint64_t sz = 0;
6e1958d8 DLM	121	int rc;
	122
	123	/*
	124	* Mapping /dev/sdXn -> /sys/block/sdX to read the chunk_size entry.
	125	* This method masks off the partition specified by the minor device
	126	* component.
	127	*/
4448b3ab KZ	128	pc = ul_new_sysfs_path(devno, NULL, NULL);
4448b3ab KZ	129	if (!pc)
ddf287b4 KZ	130	return 0;
ddf287b4 KZ	131
4448b3ab KZ	132	rc = sysfs_blkdev_get_wholedisk(pc, NULL, 0, &disk);
	133	if (rc != 0)
	134	goto done;
6e1958d8	135
4448b3ab KZ	136	/* if @pc is not while-disk device, switch to disk */
	137	if (devno != disk) {
	138	rc = sysfs_blkdev_init_path(pc, disk, NULL);
	139	if (rc != 0)
	140	goto done;
	141	}
6e1958d8	142
4448b3ab KZ	143	rc = ul_path_read_u64(pc, &sz, "queue/chunk_sectors");
	144	done:
	145	ul_unref_path(pc);
6e1958d8 DLM	146	return rc == 0 ? sz : 0;
	147	}
	148
1ad8ef91 KZ	149	/*
	150	* blkzone report
	151	*/
f1b8b84d	152	#define DEF_REPORT_LEN (1U << 12) /* 4k zones per report (256k kzalloc) */
1ad8ef91 KZ	153
	154	static const char *type_text[] = {
	155	"RESERVED",
	156	"CONVENTIONAL",
	157	"SEQ_WRITE_REQUIRED",
	158	"SEQ_WRITE_PREFERRED",
	159	};
	160
	161	static const char *condition_str[] = {
a7f74206 DLM	162	"nw", /* Not write pointer */
a7f74206 DLM	163	"em", /* Empty */
b1484d8d DLM	164	"oi", /* Implicitly opened */
b1484d8d DLM	165	"oe", /* Explicitly opened */
a7f74206	166	"cl", /* Closed */
b1484d8d	167	"x5", "x6", "x7", "x8", "x9", "xA", "xB", "xC", /* xN: reserved */
a7f74206 DLM	168	"ro", /* Read only */
	169	"fu", /* Full */
	170	"of" /* Offline */
1ad8ef91 KZ	171	};
	172
	173	static int blkzone_report(struct blkzone_control *ctl)
	174	{
	175	struct blk_zone_report *zi;
6e1958d8	176	unsigned long zonesize;
f1b8b84d	177	uint32_t i, nr_zones;
1ad8ef91 KZ	178	int fd;
	179
	180	fd = init_device(ctl, O_RDONLY);
	181
	182	if (ctl->offset > ctl->total_sectors)
	183	errx(EXIT_FAILURE, _("%s: offset is greater than device size"), ctl->devname);
f1b8b84d DLM	184
	185	zonesize = blkdev_chunk_sectors(ctl->devname);
	186	if (!zonesize)
	187	errx(EXIT_FAILURE, _("%s: unable to determine zone size"), ctl->devname);
	188
	189	if (ctl->count)
	190	nr_zones = ctl->count;
	191	else if (ctl->length)
	192	nr_zones = (ctl->length + zonesize - 1) / zonesize;
	193	else
	194	nr_zones = 1 + (ctl->total_sectors - ctl->offset) / zonesize;
1ad8ef91	195
6e1958d8 DLM	196	zi = xmalloc(sizeof(struct blk_zone_report) +
6e1958d8 DLM	197	(DEF_REPORT_LEN * sizeof(struct blk_zone)));
1ad8ef91	198
f1b8b84d	199	while (nr_zones && ctl->offset < ctl->total_sectors) {
1ad8ef91	200
f1b8b84d	201	zi->nr_zones = min(nr_zones, DEF_REPORT_LEN);
6e1958d8	202	zi->sector = ctl->offset;
1ad8ef91	203
6e1958d8 DLM	204	if (ioctl(fd, BLKREPORTZONE, zi) == -1)
6e1958d8 DLM	205	err(EXIT_FAILURE, _("%s: BLKREPORTZONE ioctl failed"), ctl->devname);
1ad8ef91	206
6e1958d8	207	if (ctl->verbose)
c8df4b17	208	printf(_("Found %d zones from 0x%"PRIx64"\n"),
6e1958d8	209	zi->nr_zones, ctl->offset);
1ad8ef91	210
6e1958d8	211	if (!zi->nr_zones) {
f1b8b84d	212	nr_zones = 0;
1ad8ef91	213	break;
6e1958d8 DLM	214	}
	215
	216	for (i = 0; i < zi->nr_zones; i++) {
	217	const struct blk_zone *entry = &zi->zones[i];
	218	unsigned int type = entry->type;
	219	uint64_t start = entry->start;
	220	uint64_t wp = entry->wp;
	221	uint8_t cond = entry->cond;
	222	uint64_t len = entry->len;
	223
	224	if (!len) {
f1b8b84d	225	nr_zones = 0;
6e1958d8 DLM	226	break;
	227	}
	228
c8df4b17	229	printf(_(" start: 0x%09"PRIx64", len 0x%06"PRIx64", wptr 0x%06"PRIx64
6e1958d8	230	" reset:%u non-seq:%u, zcond:%2u(%s) [type: %u(%s)]\n"),
a7f74206	231	start, len, (type == 0x1) ? 0 : wp - start,
6e1958d8	232	entry->reset, entry->non_seq,
b1484d8d	233	cond, condition_str[cond & (ARRAY_SIZE(condition_str) - 1)],
6e1958d8 DLM	234	type, type_text[type]);
6e1958d8 DLM	235
f1b8b84d	236	nr_zones--;
6e1958d8 DLM	237	ctl->offset = start + len;
	238
	239	}
1ad8ef91	240
1ad8ef91 KZ	241	}
	242
	243	free(zi);
	244	close(fd);
	245
	246	return 0;
	247	}
	248
	249	/*
	250	* blkzone reset
	251	*/
1ad8ef91 KZ	252	static int blkzone_reset(struct blkzone_control *ctl)
	253	{
	254	struct blk_zone_range za = { .sector = 0 };
	255	unsigned long zonesize;
	256	uint64_t zlen;
	257	int fd;
	258
	259	zonesize = blkdev_chunk_sectors(ctl->devname);
	260	if (!zonesize)
	261	errx(EXIT_FAILURE, _("%s: unable to determine zone size"), ctl->devname);
	262
	263	fd = init_device(ctl, O_WRONLY);
	264
	265	if (ctl->offset & (zonesize - 1))
f1b8b84d	266	errx(EXIT_FAILURE, _("%s: offset %" PRIu64 " is not aligned "
c8df4b17	267	"to zone size %lu"),
1ad8ef91 KZ	268	ctl->devname, ctl->offset, zonesize);
	269
	270	if (ctl->offset > ctl->total_sectors)
	271	errx(EXIT_FAILURE, _("%s: offset is greater than device size"), ctl->devname);
	272
f1b8b84d DLM	273	if (ctl->count)
	274	zlen = ctl->count * zonesize;
	275	else if (ctl->length)
	276	zlen = ctl->length;
72a73102	277	else
f1b8b84d	278	zlen = ctl->total_sectors;
1ad8ef91	279	if (ctl->offset + zlen > ctl->total_sectors)
72a73102	280	zlen = ctl->total_sectors - ctl->offset;
1ad8ef91	281
f1b8b84d DLM	282	if (ctl->length &&
	283	(zlen & (zonesize - 1)) &&
	284	ctl->offset + zlen != ctl->total_sectors)
	285	errx(EXIT_FAILURE, _("%s: number of sectors %" PRIu64 " is not aligned "
c8df4b17	286	"to zone size %lu"),
f1b8b84d DLM	287	ctl->devname, ctl->length, zonesize);
f1b8b84d DLM	288
1ad8ef91 KZ	289	za.sector = ctl->offset;
	290	za.nr_sectors = zlen;
	291
	292	if (ioctl(fd, BLKRESETZONE, &za) == -1)
	293	err(EXIT_FAILURE, _("%s: BLKRESETZONE ioctl failed"), ctl->devname);
1ad8ef91 KZ	294	else if (ctl->verbose)
	295	printf(_("%s: successfully reset in range from %" PRIu64 ", to %" PRIu64),
	296	ctl->devname,
	297	ctl->offset,
f1b8b84d	298	ctl->offset + zlen);
1ad8ef91 KZ	299	close(fd);
	300	return 0;
	301	}
	302
86be6a32	303	static void __attribute__((__noreturn__)) usage(void)
1ad8ef91	304	{
86be6a32	305	FILE *out = stdout;
1ad8ef91 KZ	306	size_t i;
	307
	308	fputs(USAGE_HEADER, out);
	309	fprintf(out, _(" %s <command> [options] <device>\n"), program_invocation_short_name);
	310
	311	fputs(USAGE_SEPARATOR, out);
	312	fputs(_("Run zone command on the given block device.\n"), out);
	313
6e2d5a44	314	fputs(USAGE_COMMANDS, out);
1ad8ef91 KZ	315	for (i = 0; i < ARRAY_SIZE(commands); i++)
	316	fprintf(out, " %-11s %s\n", commands[i].name, _(commands[i].help));
	317
	318	fputs(USAGE_OPTIONS, out);
	319	fputs(_(" -o, --offset <sector> start sector of zone to act (in 512-byte sectors)\n"), out);
c16970f7 KZ	320	fputs(_(" -l, --length <sectors> maximum sectors to act (in 512-byte sectors)\n"), out);
c16970f7 KZ	321	fputs(_(" -c, --count <number> maximum number of zones\n"), out);
1ad8ef91 KZ	322	fputs(_(" -v, --verbose display more details\n"), out);
1ad8ef91 KZ	323	fputs(USAGE_SEPARATOR, out);
f45f3ec3	324	printf(USAGE_HELP_OPTIONS(24));
1ad8ef91	325
f45f3ec3	326	printf(USAGE_MAN_TAIL("blkzone(8)"));
86be6a32	327	exit(EXIT_SUCCESS);
1ad8ef91 KZ	328	}
	329
	330	int main(int argc, char **argv)
	331	{
	332	int c;
f1b8b84d DLM	333	struct blkzone_control ctl = {
	334	.devname = NULL,
	335	.offset = 0,
	336	.count = 0,
	337	.length = 0
	338	};
1ad8ef91 KZ	339
	340	static const struct option longopts[] = {
	341	{ "help", no_argument, NULL, 'h' },
c16970f7	342	{ "count", required_argument, NULL, 'c' }, /* max #of zones to operate on */
f1b8b84d	343	{ "length", required_argument, NULL, 'l' }, /* max of sectors to operate on */
1ad8ef91 KZ	344	{ "offset", required_argument, NULL, 'o' }, /* starting LBA */
	345	{ "verbose", no_argument, NULL, 'v' },
	346	{ "version", no_argument, NULL, 'V' },
	347	{ NULL, 0, NULL, 0 }
	348	};
c16970f7 KZ	349	static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
	350	{ 'c', 'l' },
	351	{ 0 }
	352	};
	353	int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
	354
1ad8ef91 KZ	355
	356	setlocale(LC_ALL, "");
	357	bindtextdomain(PACKAGE, LOCALEDIR);
	358	textdomain(PACKAGE);
	359	atexit(close_stdout);
	360
	361	if (argc >= 2 && *argv[1] != '-') {
	362	ctl.command = name_to_command(argv[1]);
	363	if (!ctl.command)
	364	errx(EXIT_FAILURE, _("%s is not valid command name"), argv[1]);
	365	argv++;
	366	argc--;
	367	}
	368
f1b8b84d	369	while ((c = getopt_long(argc, argv, "hc:l:o:vV", longopts, NULL)) != -1) {
c16970f7 KZ	370
	371	err_exclusive_options(c, longopts, excl, excl_st);
	372
1ad8ef91 KZ	373	switch (c) {
1ad8ef91 KZ	374	case 'h':
86be6a32	375	usage();
1ad8ef91	376	break;
f1b8b84d DLM	377	case 'c':
	378	ctl.count = strtou32_or_err(optarg,
	379	_("failed to parse number of zones"));
	380	break;
1ad8ef91 KZ	381	case 'l':
1ad8ef91 KZ	382	ctl.length = strtosize_or_err(optarg,
f1b8b84d	383	_("failed to parse number of sectors"));
1ad8ef91 KZ	384	break;
	385	case 'o':
	386	ctl.offset = strtosize_or_err(optarg,
	387	_("failed to parse zone offset"));
	388	break;
	389	case 'v':
	390	ctl.verbose = 1;
	391	break;
	392	case 'V':
	393	printf(UTIL_LINUX_VERSION);
	394	return EXIT_SUCCESS;
	395	default:
	396	errtryhelp(EXIT_FAILURE);
	397	}
	398	}
	399
	400	if (!ctl.command)
	401	errx(EXIT_FAILURE, _("no command specified"));
	402
	403	if (optind == argc)
	404	errx(EXIT_FAILURE, _("no device specified"));
	405	ctl.devname = argv[optind++];
	406
	407	if (optind != argc)
	408	errx(EXIT_FAILURE,_("unexpected number of arguments"));
	409
	410	if (ctl.command->handler(&ctl) < 0)
	411	return EXIT_FAILURE;
	412
	413	return EXIT_SUCCESS;
	414
	415	}