2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2019 Eugene Grosbein <eugen@FreeBSD.org>.
5 * Contains code written by Alan Somers <asomers@FreeBSD.org>.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/ioctl.h>
47 #include <sys/cdefs.h>
48 __FBSDID("$FreeBSD$");
50 static bool candelete(int fd);
51 static off_t getsize(const char *path);
52 static int opendev(const char *path, int flags);
53 static int trim(const char *path, off_t offset, off_t length, bool dryrun, bool verbose);
54 static void usage(const char *name);
57 main(int argc, char **argv)
68 dryrun = verbose = true;
70 while ((ch = getopt(argc, argv, "Nfl:o:qr:v")) != -1)
81 if (expand_number(optarg, &usz) == -1 ||
82 (off_t)usz < 0 || (usz == 0 && ch == 'l'))
84 "invalid %s of the region: %s",
85 ch == 'o' ? "offset" : "length",
96 if ((length = getsize(optarg)) == 0)
98 "invalid zero length reference file"
99 " for the region: %s", optarg);
110 * Safety net: do not allow mistakes like
112 * trim -f /dev/da0 -r rfile
114 * This would trim whole device then error on non-existing file -r.
115 * Following check prevents this while allowing this form still:
117 * trim -f -- /dev/da0 -r rfile
120 if (strcmp(argv[optind-1], "--") != 0) {
121 for (ch = optind; ch < argc; ch++)
122 if (argv[ch][0] == '-')
132 while ((fname = *argv++) != NULL)
133 if (trim(fname, offset, length, dryrun, verbose) < 0)
136 return (error ? EXIT_FAILURE : EXIT_SUCCESS);
142 struct diocgattr_arg arg;
144 strlcpy(arg.name, "GEOM::candelete", sizeof(arg.name));
145 arg.len = sizeof(arg.value.i);
146 if (ioctl(fd, DIOCGATTR, &arg) == 0)
147 return (arg.value.i != 0);
153 opendev(const char *path, int flags)
158 if ((fd = open(path, flags)) < 0) {
159 if (errno == ENOENT && path[0] != '/') {
160 if (asprintf(&tstr, "%s%s", _PATH_DEV, path) < 0)
161 errx(EX_OSERR, "no memory");
162 fd = open(tstr, flags);
168 err(EX_NOINPUT, "open failed: %s", path);
174 getsize(const char *path)
180 fd = opendev(path, O_RDONLY | O_DIRECT);
182 if (fstat(fd, &sb) < 0)
183 err(EX_IOERR, "fstat failed: %s", path);
185 if (S_ISREG(sb.st_mode) || S_ISDIR(sb.st_mode)) {
190 if (!S_ISCHR(sb.st_mode) && !S_ISBLK(sb.st_mode))
192 "invalid type of the file "
193 "(not regular, directory nor special device): %s",
196 if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) < 0)
198 "ioctl(DIOCGMEDIASIZE) failed, probably not a disk: "
206 trim(const char *path, off_t offset, off_t length, bool dryrun, bool verbose)
212 length = getsize(path);
215 printf("trim %s offset %ju length %ju\n",
216 path, (uintmax_t)offset, (uintmax_t)length);
219 printf("dry run: add -f to actually perform the operation\n");
223 fd = opendev(path, O_RDWR | O_DIRECT);
227 error = ioctl(fd, DIOCGDELETE, arg);
229 if (errno == EOPNOTSUPP && verbose && !candelete(fd))
230 warnx("%s: TRIM/UNMAP not supported by driver", path);
232 warn("ioctl(DIOCGDELETE) failed: %s", path);
239 usage(const char *name)
241 (void)fprintf(stderr,
242 "usage: %s [-[lo] offset[K|k|M|m|G|g|T|t]] [-r rfile] [-Nfqv] device ...\n",