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

/*
 * fstrim.c -- discard the part (or whole) of mounted filesystem.
 *
 * Copyright (C) 2010 Red Hat, Inc. All rights reserved.
 * Written by Lukas Czerner <lczerner@redhat.com>
 *            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/>.
 *
 *
 * This program uses FITRIM ioctl to discard parts or the whole filesystem
 * online (mounted). You can specify range (start and length) to be
 * discarded, or simply discard whole filesystem.
 */

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

#include "nls.h"
#include "strutils.h"
#include "c.h"
#include "closestream.h"
#include "pathnames.h"
#include "sysfs.h"

#include <libmount.h>

#ifndef FITRIM
struct fstrim_range {
	uint64_t start;
	uint64_t len;
	uint64_t minlen;
};
#define FITRIM		_IOWR('X', 121, struct fstrim_range)
#endif

/* returns: 0 = success, 1 = unsupported, < 0 = error */
static int fstrim_filesystem(const char *path, struct fstrim_range *rangetpl,
			    int verbose)
{
	int fd, rc;
	struct stat sb;
	struct fstrim_range range;

	/* kernel modifies the range */
	memcpy(&range, rangetpl, sizeof(range));

	fd = open(path, O_RDONLY);
	if (fd < 0) {
		warn(_("cannot open %s"), path);
		rc = -errno;
		goto done;
	}
	if (fstat(fd, &sb) == -1) {
		warn(_("stat of %s failed"), path);
		rc = -errno;
		goto done;
	}
	if (!S_ISDIR(sb.st_mode)) {
		warnx(_("%s: not a directory"), path);
		rc = -EINVAL;
		goto done;
	}
	errno = 0;
	if (ioctl(fd, FITRIM, &range)) {
		rc = errno == EOPNOTSUPP || errno == ENOTTY ? 1 : -errno;

		if (rc != 1)
			warn(_("%s: FITRIM ioctl failed"), path);
		goto done;
	}

	if (verbose) {
		char *str = size_to_human_string(
				SIZE_SUFFIX_3LETTER | SIZE_SUFFIX_SPACE,
				(uint64_t) range.len);
		/* TRANSLATORS: The standard value here is a very large number. */
		printf(_("%s: %s (%" PRIu64 " bytes) trimmed\n"),
				path, str, (uint64_t) range.len);
		free(str);
	}

	rc = 0;
done:
	if (fd >= 0)
		close(fd);
	return rc;
}

static int has_discard(const char *devname, struct sysfs_cxt *wholedisk)
{
	struct sysfs_cxt cxt, *parent = NULL;
	uint64_t dg = 0;
	dev_t disk = 0, dev;
	int rc;

	dev = sysfs_devname_to_devno(devname, NULL);
	if (!dev)
		return 1;
	/*
	 * This is tricky to read the info from sys/, because the queue
	 * attributes are provided for whole devices (disk) only. We're trying
	 * to reuse the whole-disk sysfs context to optimize this stuff (as
	 * system usually have just one disk only).
	 */
	if (sysfs_devno_to_wholedisk(dev, NULL, 0, &disk) || !disk)
		return 1;
	if (dev != disk) {
		if (wholedisk->devno != disk) {
			sysfs_deinit(wholedisk);
			if (sysfs_init(wholedisk, disk, NULL))
				return 1;
		}
		parent = wholedisk;
	}

	rc = sysfs_init(&cxt, dev, parent);
	if (!rc)
		rc = sysfs_read_u64(&cxt, "queue/discard_granularity", &dg);

	sysfs_deinit(&cxt);
	return rc == 0 && dg > 0;
}


static int uniq_fs_target_cmp(
		struct libmnt_table *tb __attribute__((__unused__)),
		struct libmnt_fs *a,
		struct libmnt_fs *b)
{
	return !mnt_fs_streq_target(a, mnt_fs_get_target(b));
}

static int uniq_fs_source_cmp(
		struct libmnt_table *tb __attribute__((__unused__)),
		struct libmnt_fs *a,
		struct libmnt_fs *b)
{
	if (mnt_fs_is_pseudofs(a) || mnt_fs_is_netfs(a) ||
	    mnt_fs_is_pseudofs(b) || mnt_fs_is_netfs(b))
		return 1;

	return !mnt_fs_streq_srcpath(a, mnt_fs_get_srcpath(b));
}

/*
 * fstrim --all follows "mount -a" return codes:
 *
 * 0  = all success
 * 32 = all failed
 * 64 = some failed, some success
 */
static int fstrim_all(struct fstrim_range *rangetpl, int verbose)
{
	struct libmnt_fs *fs;
	struct libmnt_iter *itr;
	struct libmnt_table *tab;
	struct sysfs_cxt wholedisk = UL_SYSFSCXT_EMPTY;
	int cnt = 0, cnt_err = 0;

	mnt_init_debug(0);

	itr = mnt_new_iter(MNT_ITER_BACKWARD);
	if (!itr)
		err(MNT_EX_FAIL, _("failed to initialize libmount iterator"));

	tab = mnt_new_table_from_file(_PATH_PROC_MOUNTINFO);
	if (!tab)
		err(MNT_EX_FAIL, _("failed to parse %s"), _PATH_PROC_MOUNTINFO);

	/* de-duplicate by mountpoints */
	mnt_table_uniq_fs(tab, 0, uniq_fs_target_cmp);

	/* de-duplicate by source */
	mnt_table_uniq_fs(tab, MNT_UNIQ_FORWARD, uniq_fs_source_cmp);

	while (mnt_table_next_fs(tab, itr, &fs) == 0) {
		const char *src = mnt_fs_get_srcpath(fs),
			   *tgt = mnt_fs_get_target(fs);
		char *path;
		int rc = 1;

		if (!src || !tgt || *src != '/' ||
		    mnt_fs_is_pseudofs(fs) ||
		    mnt_fs_is_netfs(fs))
			continue;

		/* Is it really accessible mountpoint? Not all mountpoints are
		 * accessible (maybe over mounted by another filesystem) */
		path = mnt_get_mountpoint(tgt);
		if (path && strcmp(path, tgt) == 0)
			rc = 0;
		free(path);
		if (rc)
			continue;	/* overlaying mount */

		if (!has_discard(src, &wholedisk))
			continue;
		cnt++;

		/*
		 * We're able to detect that the device supports discard, but
		 * things also depend on filesystem or device mapping, for
		 * example vfat or LUKS (by default) does not support FSTRIM.
		 *
		 * This is reason why we ignore EOPNOTSUPP and ENOTTY errors
		 * from discard ioctl.
		 */
		if (fstrim_filesystem(tgt, rangetpl, verbose) < 0)
		       cnt_err++;
	}

	sysfs_deinit(&wholedisk);
	mnt_unref_table(tab);
	mnt_free_iter(itr);

	if (cnt && cnt == cnt_err)
		return MNT_EX_FAIL;		/* all failed */
	if (cnt && cnt_err)
		return MNT_EX_SOMEOK;		/* some ok */

	return EXIT_SUCCESS;
}

static void __attribute__((__noreturn__)) usage(void)
{
	FILE *out = stdout;
	fputs(USAGE_HEADER, out);
	fprintf(out,
	      _(" %s [options] <mount point>\n"), program_invocation_short_name);

	fputs(USAGE_SEPARATOR, out);
	fputs(_("Discard unused blocks on a mounted filesystem.\n"), out);

	fputs(USAGE_OPTIONS, out);
	fputs(_(" -a, --all           trim all mounted filesystems that are supported\n"), out);
	fputs(_(" -o, --offset <num>  the offset in bytes to start discarding from\n"), out);
	fputs(_(" -l, --length <num>  the number of bytes to discard\n"), out);
	fputs(_(" -m, --minimum <num> the minimum extent length to discard\n"), out);
	fputs(_(" -v, --verbose       print number of discarded bytes\n"), out);

	fputs(USAGE_SEPARATOR, out);
	printf(USAGE_HELP_OPTIONS(21));
	printf(USAGE_MAN_TAIL("fstrim(8)"));
	exit(EXIT_SUCCESS);
}

int main(int argc, char **argv)
{
	char *path = NULL;
	int c, rc, verbose = 0, all = 0;
	struct fstrim_range range;

	static const struct option longopts[] = {
	    { "all",       no_argument,       NULL, 'a' },
	    { "help",      no_argument,       NULL, 'h' },
	    { "version",   no_argument,       NULL, 'V' },
	    { "offset",    required_argument, NULL, 'o' },
	    { "length",    required_argument, NULL, 'l' },
	    { "minimum",   required_argument, NULL, 'm' },
	    { "verbose",   no_argument,       NULL, 'v' },
	    { NULL, 0, NULL, 0 }
	};

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

	memset(&range, 0, sizeof(range));
	range.len = ULLONG_MAX;

	while ((c = getopt_long(argc, argv, "ahVo:l:m:v", longopts, NULL)) != -1) {
		switch(c) {
		case 'a':
			all = 1;
			break;
		case 'h':
			usage();
			break;
		case 'V':
			printf(UTIL_LINUX_VERSION);
			return EXIT_SUCCESS;
		case 'l':
			range.len = strtosize_or_err(optarg,
					_("failed to parse length"));
			break;
		case 'o':
			range.start = strtosize_or_err(optarg,
					_("failed to parse offset"));
			break;
		case 'm':
			range.minlen = strtosize_or_err(optarg,
					_("failed to parse minimum extent length"));
			break;
		case 'v':
			verbose = 1;
			break;
		default:
			errtryhelp(EXIT_FAILURE);
			break;
		}
	}

	if (!all) {
		if (optind == argc)
			errx(EXIT_FAILURE, _("no mountpoint specified"));
		path = argv[optind++];
	}

	if (optind != argc) {
		warnx(_("unexpected number of arguments"));
		errtryhelp(EXIT_FAILURE);
	}

	if (all)
		rc = fstrim_all(&range, verbose);
	else {
		rc = fstrim_filesystem(path, &range, verbose);
		if (rc == 1) {
			warnx(_("%s: the discard operation is not supported"), path);
			rc = EXIT_FAILURE;
		}
	}

	return rc;
}
Commit	Line	Data
d9e2d0dd LC	1	/*
	2	* fstrim.c -- discard the part (or whole) of mounted filesystem.
	3	*
fce05e96	4	* Copyright (C) 2010 Red Hat, Inc. All rights reserved.
d9e2d0dd LC	5	* Written by Lukas Czerner <lczerner@redhat.com>
	6	* Karel Zak <kzak@redhat.com>
	7	*
	8	* This program is free software: you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation, either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	20	*
	21	*
	22	* This program uses FITRIM ioctl to discard parts or the whole filesystem
	23	* online (mounted). You can specify range (start and length) to be
e3d61a45	24	* discarded, or simply discard whole filesystem.
d9e2d0dd	25	*/
fce05e96	26
d9e2d0dd LC	27	#include <string.h>
	28	#include <unistd.h>
	29	#include <stdlib.h>
	30	#include <stdio.h>
	31	#include <stdint.h>
	32	#include <fcntl.h>
	33	#include <limits.h>
	34	#include <getopt.h>
d9e2d0dd LC	35
	36	#include <sys/ioctl.h>
	37	#include <sys/stat.h>
	38	#include <linux/fs.h>
	39
	40	#include "nls.h"
	41	#include "strutils.h"
eb76ca98	42	#include "c.h"
efb8854f	43	#include "closestream.h"
36c370cb KZ	44	#include "pathnames.h"
36c370cb KZ	45	#include "sysfs.h"
36c370cb KZ	46
36c370cb KZ	47	#include <libmount.h>
d9e2d0dd LC	48
	49	#ifndef FITRIM
	50	struct fstrim_range {
	51	uint64_t start;
	52	uint64_t len;
	53	uint64_t minlen;
	54	};
fce05e96	55	#define FITRIM _IOWR('X', 121, struct fstrim_range)
d9e2d0dd LC	56	#endif
d9e2d0dd LC	57
36c370cb KZ	58	/* returns: 0 = success, 1 = unsupported, < 0 = error */
	59	static int fstrim_filesystem(const char path, struct fstrim_range rangetpl,
	60	int verbose)
	61	{
ee24ab6f	62	int fd, rc;
36c370cb KZ	63	struct stat sb;
	64	struct fstrim_range range;
	65
	66	/* kernel modifies the range */
	67	memcpy(&range, rangetpl, sizeof(range));
	68
e612ead9 SK	69	fd = open(path, O_RDONLY);
	70	if (fd < 0) {
	71	warn(_("cannot open %s"), path);
289b1533 KZ	72	rc = -errno;
289b1533 KZ	73	goto done;
e612ead9 SK	74	}
e612ead9 SK	75	if (fstat(fd, &sb) == -1) {
fc14ceba	76	warn(_("stat of %s failed"), path);
289b1533 KZ	77	rc = -errno;
289b1533 KZ	78	goto done;
36c370cb KZ	79	}
	80	if (!S_ISDIR(sb.st_mode)) {
	81	warnx(_("%s: not a directory"), path);
289b1533 KZ	82	rc = -EINVAL;
289b1533 KZ	83	goto done;
36c370cb	84	}
36c370cb KZ	85	errno = 0;
36c370cb KZ	86	if (ioctl(fd, FITRIM, &range)) {
289b1533	87	rc = errno == EOPNOTSUPP \|\| errno == ENOTTY ? 1 : -errno;
36c370cb KZ	88
	89	if (rc != 1)
	90	warn(_("%s: FITRIM ioctl failed"), path);
289b1533	91	goto done;
36c370cb KZ	92	}
	93
	94	if (verbose) {
	95	char *str = size_to_human_string(
	96	SIZE_SUFFIX_3LETTER \| SIZE_SUFFIX_SPACE,
	97	(uint64_t) range.len);
	98	/* TRANSLATORS: The standard value here is a very large number. */
	99	printf(_("%s: %s (%" PRIu64 " bytes) trimmed\n"),
	100	path, str, (uint64_t) range.len);
	101	free(str);
	102	}
289b1533 KZ	103
	104	rc = 0;
	105	done:
	106	if (fd >= 0)
	107	close(fd);
	108	return rc;
36c370cb KZ	109	}
	110
	111	static int has_discard(const char devname, struct sysfs_cxt wholedisk)
	112	{
	113	struct sysfs_cxt cxt, *parent = NULL;
	114	uint64_t dg = 0;
	115	dev_t disk = 0, dev;
	116	int rc;
	117
	118	dev = sysfs_devname_to_devno(devname, NULL);
	119	if (!dev)
	120	return 1;
	121	/*
	122	* This is tricky to read the info from sys/, because the queue
9e930041	123	* attributes are provided for whole devices (disk) only. We're trying
36c370cb	124	* to reuse the whole-disk sysfs context to optimize this stuff (as
0e65dcde	125	* system usually have just one disk only).
36c370cb KZ	126	*/
	127	if (sysfs_devno_to_wholedisk(dev, NULL, 0, &disk) \|\| !disk)
	128	return 1;
	129	if (dev != disk) {
	130	if (wholedisk->devno != disk) {
	131	sysfs_deinit(wholedisk);
	132	if (sysfs_init(wholedisk, disk, NULL))
	133	return 1;
	134	}
	135	parent = wholedisk;
	136	}
	137
	138	rc = sysfs_init(&cxt, dev, parent);
	139	if (!rc)
	140	rc = sysfs_read_u64(&cxt, "queue/discard_granularity", &dg);
	141
	142	sysfs_deinit(&cxt);
	143	return rc == 0 && dg > 0;
	144	}
	145
e05a3400 KZ	146
	147	static int uniq_fs_target_cmp(
	148	struct libmnt_table *tb __attribute__((__unused__)),
	149	struct libmnt_fs *a,
	150	struct libmnt_fs *b)
	151	{
	152	return !mnt_fs_streq_target(a, mnt_fs_get_target(b));
	153	}
	154
8dd51c18 KZ	155	static int uniq_fs_source_cmp(
	156	struct libmnt_table *tb __attribute__((__unused__)),
	157	struct libmnt_fs *a,
	158	struct libmnt_fs *b)
	159	{
8dd51c18 KZ	160	if (mnt_fs_is_pseudofs(a) \|\| mnt_fs_is_netfs(a) \|\|
	161	mnt_fs_is_pseudofs(b) \|\| mnt_fs_is_netfs(b))
	162	return 1;
	163
afa382f2	164	return !mnt_fs_streq_srcpath(a, mnt_fs_get_srcpath(b));
8dd51c18 KZ	165	}
8dd51c18 KZ	166
36c370cb KZ	167	/*
	168	* fstrim --all follows "mount -a" return codes:
	169	*
	170	* 0 = all success
	171	* 32 = all failed
	172	* 64 = some failed, some success
	173	*/
	174	static int fstrim_all(struct fstrim_range *rangetpl, int verbose)
	175	{
	176	struct libmnt_fs *fs;
	177	struct libmnt_iter *itr;
	178	struct libmnt_table *tab;
	179	struct sysfs_cxt wholedisk = UL_SYSFSCXT_EMPTY;
	180	int cnt = 0, cnt_err = 0;
	181
e05a3400 KZ	182	mnt_init_debug(0);
e05a3400 KZ	183
36c370cb KZ	184	itr = mnt_new_iter(MNT_ITER_BACKWARD);
36c370cb KZ	185	if (!itr)
8e9039af	186	err(MNT_EX_FAIL, _("failed to initialize libmount iterator"));
36c370cb KZ	187
	188	tab = mnt_new_table_from_file(_PATH_PROC_MOUNTINFO);
	189	if (!tab)
8e9039af	190	err(MNT_EX_FAIL, _("failed to parse %s"), _PATH_PROC_MOUNTINFO);
36c370cb	191
8dd51c18	192	/* de-duplicate by mountpoints */
e05a3400 KZ	193	mnt_table_uniq_fs(tab, 0, uniq_fs_target_cmp);
e05a3400 KZ	194
c0b07485	195	/* de-duplicate by source */
155d48f5	196	mnt_table_uniq_fs(tab, MNT_UNIQ_FORWARD, uniq_fs_source_cmp);
8dd51c18	197
36c370cb KZ	198	while (mnt_table_next_fs(tab, itr, &fs) == 0) {
	199	const char *src = mnt_fs_get_srcpath(fs),
	200	*tgt = mnt_fs_get_target(fs);
	201	char *path;
	202	int rc = 1;
	203
	204	if (!src \|\| !tgt \|\| *src != '/' \|\|
	205	mnt_fs_is_pseudofs(fs) \|\|
	206	mnt_fs_is_netfs(fs))
	207	continue;
	208
	209	/* Is it really accessible mountpoint? Not all mountpoints are
9e930041	210	* accessible (maybe over mounted by another filesystem) */
36c370cb KZ	211	path = mnt_get_mountpoint(tgt);
	212	if (path && strcmp(path, tgt) == 0)
	213	rc = 0;
	214	free(path);
	215	if (rc)
	216	continue; /* overlaying mount */
	217
	218	if (!has_discard(src, &wholedisk))
	219	continue;
	220	cnt++;
	221
	222	/*
	223	* We're able to detect that the device supports discard, but
	224	* things also depend on filesystem or device mapping, for
	225	* example vfat or LUKS (by default) does not support FSTRIM.
	226	*
	227	* This is reason why we ignore EOPNOTSUPP and ENOTTY errors
	228	* from discard ioctl.
	229	*/
	230	if (fstrim_filesystem(tgt, rangetpl, verbose) < 0)
	231	cnt_err++;
	232	}
	233
	234	sysfs_deinit(&wholedisk);
e05a3400	235	mnt_unref_table(tab);
df1a1ca0	236	mnt_free_iter(itr);
36c370cb KZ	237
36c370cb KZ	238	if (cnt && cnt == cnt_err)
8e9039af	239	return MNT_EX_FAIL; /* all failed */
36c370cb	240	if (cnt && cnt_err)
8e9039af	241	return MNT_EX_SOMEOK; /* some ok */
36c370cb KZ	242
	243	return EXIT_SUCCESS;
	244	}
	245
6e1eda6f	246	static void __attribute__((__noreturn__)) usage(void)
d9e2d0dd	247	{
6e1eda6f	248	FILE *out = stdout;
47a9edbd	249	fputs(USAGE_HEADER, out);
fce05e96 KZ	250	fprintf(out,
fce05e96 KZ	251	_(" %s [options] <mount point>\n"), program_invocation_short_name);
451dbcfa BS	252
	253	fputs(USAGE_SEPARATOR, out);
	254	fputs(_("Discard unused blocks on a mounted filesystem.\n"), out);
	255
fce05e96	256	fputs(USAGE_OPTIONS, out);
d6bbe804 BS	257	fputs(_(" -a, --all trim all mounted filesystems that are supported\n"), out);
	258	fputs(_(" -o, --offset <num> the offset in bytes to start discarding from\n"), out);
	259	fputs(_(" -l, --length <num> the number of bytes to discard\n"), out);
	260	fputs(_(" -m, --minimum <num> the minimum extent length to discard\n"), out);
a60fa93c KZ	261	fputs(_(" -v, --verbose print number of discarded bytes\n"), out);
a60fa93c KZ	262
47a9edbd	263	fputs(USAGE_SEPARATOR, out);
f45f3ec3 RM	264	printf(USAGE_HELP_OPTIONS(21));
f45f3ec3 RM	265	printf(USAGE_MAN_TAIL("fstrim(8)"));
6e1eda6f	266	exit(EXIT_SUCCESS);
d9e2d0dd LC	267	}
d9e2d0dd LC	268
c84ed54c KZ	269	int main(int argc, char **argv)
c84ed54c KZ	270	{
b35c3727	271	char *path = NULL;
36c370cb	272	int c, rc, verbose = 0, all = 0;
fce05e96	273	struct fstrim_range range;
c84ed54c	274
fce05e96	275	static const struct option longopts[] = {
87918040 SK	276	{ "all", no_argument, NULL, 'a' },
	277	{ "help", no_argument, NULL, 'h' },
	278	{ "version", no_argument, NULL, 'V' },
	279	{ "offset", required_argument, NULL, 'o' },
	280	{ "length", required_argument, NULL, 'l' },
	281	{ "minimum", required_argument, NULL, 'm' },
	282	{ "verbose", no_argument, NULL, 'v' },
	283	{ NULL, 0, NULL, 0 }
d9e2d0dd LC	284	};
	285
	286	setlocale(LC_ALL, "");
	287	bindtextdomain(PACKAGE, LOCALEDIR);
	288	textdomain(PACKAGE);
efb8854f	289	atexit(close_stdout);
d9e2d0dd	290
fce05e96 KZ	291	memset(&range, 0, sizeof(range));
fce05e96 KZ	292	range.len = ULLONG_MAX;
d9e2d0dd	293
36c370cb	294	while ((c = getopt_long(argc, argv, "ahVo:l:m:v", longopts, NULL)) != -1) {
d9e2d0dd	295	switch(c) {
36c370cb KZ	296	case 'a':
	297	all = 1;
	298	break;
d9e2d0dd	299	case 'h':
6e1eda6f	300	usage();
d9e2d0dd	301	break;
47a9edbd SK	302	case 'V':
	303	printf(UTIL_LINUX_VERSION);
	304	return EXIT_SUCCESS;
d9e2d0dd	305	case 'l':
fce05e96	306	range.len = strtosize_or_err(optarg,
28c71021	307	_("failed to parse length"));
d9e2d0dd LC	308	break;
d9e2d0dd LC	309	case 'o':
fce05e96	310	range.start = strtosize_or_err(optarg,
28c71021	311	_("failed to parse offset"));
d9e2d0dd LC	312	break;
d9e2d0dd LC	313	case 'm':
fce05e96	314	range.minlen = strtosize_or_err(optarg,
28c71021	315	_("failed to parse minimum extent length"));
d9e2d0dd LC	316	break;
	317	case 'v':
	318	verbose = 1;
	319	break;
	320	default:
677ec86c	321	errtryhelp(EXIT_FAILURE);
d9e2d0dd LC	322	break;
d9e2d0dd LC	323	}
fce05e96	324	}
d9e2d0dd	325
36c370cb KZ	326	if (!all) {
	327	if (optind == argc)
	328	errx(EXIT_FAILURE, _("no mountpoint specified"));
	329	path = argv[optind++];
	330	}
d9e2d0dd LC	331
	332	if (optind != argc) {
	333	warnx(_("unexpected number of arguments"));
6e1eda6f	334	errtryhelp(EXIT_FAILURE);
d9e2d0dd LC	335	}
d9e2d0dd LC	336
36c370cb KZ	337	if (all)
	338	rc = fstrim_all(&range, verbose);
	339	else {
	340	rc = fstrim_filesystem(path, &range, verbose);
	341	if (rc == 1) {
1d231190	342	warnx(_("%s: the discard operation is not supported"), path);
36c370cb KZ	343	rc = EXIT_FAILURE;
36c370cb KZ	344	}
fe98b180	345	}
36c370cb KZ	346
36c370cb KZ	347	return rc;
d9e2d0dd	348	}