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Commit | Line | Data |
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6dbe3af9 | 1 | /* |
9abd5e4b KZ |
2 | * SPDX-License-Identifier: GPL-2.0-or-later |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * Original implementation from Ted Ts'o; losetup was part of mount. | |
10 | * | |
11 | * Copyright (C) 2011-2023 Karel Zak <kzak@redhat.com> | |
39fde137 | 12 | * |
6dbe3af9 KZ |
13 | * losetup.c - setup and control loop devices |
14 | */ | |
896352d3 | 15 | #include <assert.h> |
6dbe3af9 KZ |
16 | #include <stdio.h> |
17 | #include <string.h> | |
fd6b7a7f | 18 | #include <errno.h> |
6dbe3af9 KZ |
19 | #include <stdlib.h> |
20 | #include <unistd.h> | |
21 | #include <sys/ioctl.h> | |
fd6b7a7f | 22 | #include <sys/stat.h> |
7711bc17 | 23 | #include <inttypes.h> |
65329058 | 24 | #include <getopt.h> |
6dbe3af9 | 25 | |
7e86cd54 OO |
26 | #include <libsmartcols.h> |
27 | ||
934df30d | 28 | #include "c.h" |
7eda085c | 29 | #include "nls.h" |
934df30d | 30 | #include "strutils.h" |
de4acb05 | 31 | #include "loopdev.h" |
efb8854f | 32 | #include "closestream.h" |
96801c48 | 33 | #include "optutils.h" |
896352d3 | 34 | #include "xalloc.h" |
114ade3d | 35 | #include "canonicalize.h" |
362f5d20 | 36 | #include "pathnames.h" |
96801c48 | 37 | |
39fde137 | 38 | enum { |
c7e0925d | 39 | A_CREATE = 1, /* setup a new device */ |
c654c4f0 KZ |
40 | A_DELETE, /* delete given device(s) */ |
41 | A_DELETE_ALL, /* delete all devices */ | |
39fde137 | 42 | A_SHOW, /* list devices */ |
09ec0c0a | 43 | A_SHOW_ONE, /* print info about one device */ |
39fde137 KZ |
44 | A_FIND_FREE, /* find first unused */ |
45 | A_SET_CAPACITY, /* set device capacity */ | |
64c3bb3c | 46 | A_SET_DIRECT_IO, /* set accessing backing file by direct io */ |
a1a41597 | 47 | A_SET_BLOCKSIZE, /* set logical block size of the loop device */ |
39fde137 KZ |
48 | }; |
49 | ||
896352d3 OO |
50 | enum { |
51 | COL_NAME = 0, | |
52 | COL_AUTOCLR, | |
53 | COL_BACK_FILE, | |
54 | COL_BACK_INO, | |
55 | COL_BACK_MAJMIN, | |
422f54c0 KZ |
56 | COL_BACK_MAJ, |
57 | COL_BACK_MIN, | |
896352d3 | 58 | COL_MAJMIN, |
422f54c0 KZ |
59 | COL_MAJ, |
60 | COL_MIN, | |
896352d3 OO |
61 | COL_OFFSET, |
62 | COL_PARTSCAN, | |
db8f7815 | 63 | COL_REF, |
896352d3 | 64 | COL_RO, |
4ad996d7 | 65 | COL_SIZELIMIT, |
faeef4d2 | 66 | COL_DIO, |
76493ceb | 67 | COL_LOGSEC, |
896352d3 OO |
68 | }; |
69 | ||
7e86cd54 OO |
70 | /* basic output flags */ |
71 | static int no_headings; | |
72 | static int raw; | |
4827093d | 73 | static int json; |
896352d3 OO |
74 | |
75 | struct colinfo { | |
37b2b3fa | 76 | const char * const name; |
896352d3 OO |
77 | double whint; |
78 | int flags; | |
79 | const char *help; | |
46de0fe6 KZ |
80 | |
81 | int json_type; /* default is string */ | |
896352d3 OO |
82 | }; |
83 | ||
37b2b3fa | 84 | static const struct colinfo infos[] = { |
46de0fe6 | 85 | [COL_AUTOCLR] = { "AUTOCLEAR", 1, SCOLS_FL_RIGHT, N_("autoclear flag set"), SCOLS_JSON_BOOLEAN}, |
9e85d591 | 86 | [COL_BACK_FILE] = { "BACK-FILE", 0.3, SCOLS_FL_NOEXTREMES, N_("device backing file")}, |
46de0fe6 | 87 | [COL_BACK_INO] = { "BACK-INO", 4, SCOLS_FL_RIGHT, N_("backing file inode number"), SCOLS_JSON_NUMBER}, |
896352d3 | 88 | [COL_BACK_MAJMIN] = { "BACK-MAJ:MIN", 6, 0, N_("backing file major:minor device number")}, |
422f54c0 KZ |
89 | [COL_BACK_MAJ] = { "BACK-MAJ", 6, 0, N_("backing file major device number")}, |
90 | [COL_BACK_MIN] = { "BACK-MIN", 6, 0, N_("backing file minor device number")}, | |
896352d3 | 91 | [COL_NAME] = { "NAME", 0.25, 0, N_("loop device name")}, |
46de0fe6 KZ |
92 | [COL_OFFSET] = { "OFFSET", 5, SCOLS_FL_RIGHT, N_("offset from the beginning"), SCOLS_JSON_NUMBER}, |
93 | [COL_PARTSCAN] = { "PARTSCAN", 1, SCOLS_FL_RIGHT, N_("partscan flag set"), SCOLS_JSON_BOOLEAN}, | |
db8f7815 | 94 | [COL_REF] = { "REF", 0.1, 0, N_("loop device reference string")}, |
46de0fe6 KZ |
95 | [COL_RO] = { "RO", 1, SCOLS_FL_RIGHT, N_("read-only device"), SCOLS_JSON_BOOLEAN}, |
96 | [COL_SIZELIMIT] = { "SIZELIMIT", 5, SCOLS_FL_RIGHT, N_("size limit of the file in bytes"), SCOLS_JSON_NUMBER}, | |
896352d3 | 97 | [COL_MAJMIN] = { "MAJ:MIN", 3, 0, N_("loop device major:minor number")}, |
422f54c0 KZ |
98 | [COL_MAJ] = { "MAJ", 1, SCOLS_FL_RIGHT, N_("loop device major number"), SCOLS_JSON_NUMBER}, |
99 | [COL_MIN] = { "MIN", 1, SCOLS_FL_RIGHT, N_("loop device minor number"), SCOLS_JSON_NUMBER}, | |
46de0fe6 KZ |
100 | [COL_DIO] = { "DIO", 1, SCOLS_FL_RIGHT, N_("access backing file with direct-io"), SCOLS_JSON_BOOLEAN}, |
101 | [COL_LOGSEC] = { "LOG-SEC", 4, SCOLS_FL_RIGHT, N_("logical sector size in bytes"), SCOLS_JSON_NUMBER}, | |
896352d3 OO |
102 | }; |
103 | ||
d78deddc | 104 | static int columns[ARRAY_SIZE(infos) * 2] = {-1}; |
40b17508 | 105 | static size_t ncolumns; |
6dbe3af9 | 106 | |
896352d3 OO |
107 | static int get_column_id(int num) |
108 | { | |
40b17508 KZ |
109 | assert(num >= 0); |
110 | assert((size_t) num < ncolumns); | |
d78deddc | 111 | assert(columns[num] < (int) ARRAY_SIZE(infos)); |
896352d3 OO |
112 | return columns[num]; |
113 | } | |
114 | ||
37b2b3fa | 115 | static const struct colinfo *get_column_info(int num) |
896352d3 OO |
116 | { |
117 | return &infos[ get_column_id(num) ]; | |
118 | } | |
119 | ||
120 | static int column_name_to_id(const char *name, size_t namesz) | |
121 | { | |
122 | size_t i; | |
123 | ||
d78deddc | 124 | for (i = 0; i < ARRAY_SIZE(infos); i++) { |
896352d3 OO |
125 | const char *cn = infos[i].name; |
126 | ||
127 | if (!strncasecmp(name, cn, namesz) && !*(cn + namesz)) | |
128 | return i; | |
129 | } | |
130 | warnx(_("unknown column: %s"), name); | |
131 | return -1; | |
132 | } | |
d03dd608 | 133 | |
39fde137 KZ |
134 | static int printf_loopdev(struct loopdev_cxt *lc) |
135 | { | |
136 | uint64_t x; | |
137 | dev_t dev = 0; | |
138 | ino_t ino = 0; | |
1b504263 | 139 | char *fname; |
a3b421df | 140 | uint32_t type; |
39fde137 KZ |
141 | |
142 | fname = loopcxt_get_backing_file(lc); | |
143 | if (!fname) | |
144 | return -EINVAL; | |
145 | ||
146 | if (loopcxt_get_backing_devno(lc, &dev) == 0) | |
147 | loopcxt_get_backing_inode(lc, &ino); | |
148 | ||
149 | if (!dev && !ino) { | |
150 | /* | |
151 | * Probably non-root user (no permissions to | |
152 | * call LOOP_GET_STATUS ioctls). | |
153 | */ | |
a6ca0456 JB |
154 | printf("%s%s: []: (%s)", |
155 | loopcxt_get_device(lc), | |
156 | loopcxt_is_lost(lc) ? " (lost)" : "", | |
157 | fname); | |
39fde137 KZ |
158 | |
159 | if (loopcxt_get_offset(lc, &x) == 0 && x) | |
160 | printf(_(", offset %ju"), x); | |
39fde137 KZ |
161 | if (loopcxt_get_sizelimit(lc, &x) == 0 && x) |
162 | printf(_(", sizelimit %ju"), x); | |
a6ca0456 | 163 | |
9c6af25c | 164 | goto done; |
39fde137 KZ |
165 | } |
166 | ||
a6ca0456 JB |
167 | printf("%s%s: [%04jd]:%ju (%s)", |
168 | loopcxt_get_device(lc), | |
169 | loopcxt_is_lost(lc) ? " (lost)" : "", | |
170 | (intmax_t) dev, (uintmax_t) ino, fname); | |
39fde137 KZ |
171 | |
172 | if (loopcxt_get_offset(lc, &x) == 0 && x) | |
173 | printf(_(", offset %ju"), x); | |
39fde137 KZ |
174 | if (loopcxt_get_sizelimit(lc, &x) == 0 && x) |
175 | printf(_(", sizelimit %ju"), x); | |
176 | ||
177 | if (loopcxt_get_encrypt_type(lc, &type) == 0) { | |
178 | const char *e = loopcxt_get_crypt_name(lc); | |
179 | ||
180 | if ((!e || !*e) && type == 1) | |
181 | e = "XOR"; | |
182 | if (e && *e) | |
a3b421df | 183 | printf(_(", encryption %s (type %u)"), e, type); |
39fde137 | 184 | } |
9c6af25c KZ |
185 | |
186 | done: | |
187 | free(fname); | |
39fde137 KZ |
188 | printf("\n"); |
189 | return 0; | |
190 | } | |
191 | ||
bc0ac075 KZ |
192 | static int show_all_loops(struct loopdev_cxt *lc, const char *file, |
193 | uint64_t offset, int flags) | |
39fde137 | 194 | { |
bc0ac075 | 195 | struct stat sbuf, *st = &sbuf; |
6d62bc0f | 196 | char *cn_file = NULL; |
bc0ac075 | 197 | |
39fde137 | 198 | if (loopcxt_init_iterator(lc, LOOPITER_FL_USED)) |
6e90a44c | 199 | return -1; |
39fde137 | 200 | |
bc0ac075 KZ |
201 | if (!file || stat(file, st)) |
202 | st = NULL; | |
203 | ||
204 | while (loopcxt_next(lc) == 0) { | |
6d62bc0f KZ |
205 | if (file) { |
206 | int used; | |
207 | const char *bf = cn_file ? cn_file : file; | |
208 | ||
74a4705a | 209 | used = loopcxt_is_used(lc, st, bf, offset, 0, flags); |
6d62bc0f KZ |
210 | if (!used && !cn_file) { |
211 | bf = cn_file = canonicalize_path(file); | |
74a4705a | 212 | used = loopcxt_is_used(lc, st, bf, offset, 0, flags); |
6d62bc0f KZ |
213 | } |
214 | if (!used) | |
114ade3d SK |
215 | continue; |
216 | } | |
bc0ac075 KZ |
217 | printf_loopdev(lc); |
218 | } | |
c654c4f0 | 219 | loopcxt_deinit_iterator(lc); |
f614b73c | 220 | free(cn_file); |
6e90a44c KZ |
221 | return 0; |
222 | } | |
223 | ||
a6ca0456 JB |
224 | static void warn_lost(struct loopdev_cxt *lc) |
225 | { | |
226 | dev_t devno = loopcxt_get_devno(lc); | |
227 | ||
228 | if (devno <= 0) | |
229 | return; | |
230 | ||
231 | warnx(("device node %s (%u:%u) is lost. You may use mknod(1) to recover it."), | |
232 | loopcxt_get_device(lc), major(devno), minor(devno)); | |
233 | } | |
234 | ||
c654c4f0 KZ |
235 | static int delete_loop(struct loopdev_cxt *lc) |
236 | { | |
a6ca0456 | 237 | if (loopcxt_delete_device(lc)) { |
c654c4f0 | 238 | warn(_("%s: detach failed"), loopcxt_get_device(lc)); |
a6ca0456 JB |
239 | if (loopcxt_is_lost(lc)) |
240 | warn_lost(lc); | |
241 | } else | |
c654c4f0 KZ |
242 | return 0; |
243 | ||
244 | return -1; | |
245 | } | |
246 | ||
247 | static int delete_all_loops(struct loopdev_cxt *lc) | |
248 | { | |
249 | int res = 0; | |
250 | ||
251 | if (loopcxt_init_iterator(lc, LOOPITER_FL_USED)) | |
252 | return -1; | |
253 | ||
254 | while (loopcxt_next(lc) == 0) | |
255 | res += delete_loop(lc); | |
256 | ||
257 | loopcxt_deinit_iterator(lc); | |
258 | return res; | |
39fde137 KZ |
259 | } |
260 | ||
7e86cd54 | 261 | static int set_scols_data(struct loopdev_cxt *lc, struct libscols_line *ln) |
896352d3 | 262 | { |
40b17508 | 263 | size_t i; |
896352d3 OO |
264 | |
265 | for (i = 0; i < ncolumns; i++) { | |
48f1f38b KZ |
266 | const char *p = NULL; /* external data */ |
267 | char *np = NULL; /* allocated here */ | |
896352d3 | 268 | uint64_t x = 0; |
a9e3ec19 | 269 | int rc = 0; |
896352d3 OO |
270 | |
271 | switch(get_column_id(i)) { | |
272 | case COL_NAME: | |
273 | p = loopcxt_get_device(lc); | |
a6ca0456 JB |
274 | if (loopcxt_is_lost(lc)) { |
275 | xasprintf(&np, "%s (lost)", p); | |
276 | p = NULL; | |
277 | } | |
896352d3 OO |
278 | break; |
279 | case COL_BACK_FILE: | |
01dd2838 | 280 | np = loopcxt_get_backing_file(lc); |
896352d3 OO |
281 | break; |
282 | case COL_OFFSET: | |
283 | if (loopcxt_get_offset(lc, &x) == 0) | |
284 | xasprintf(&np, "%jd", x); | |
896352d3 | 285 | break; |
4ad996d7 | 286 | case COL_SIZELIMIT: |
896352d3 OO |
287 | if (loopcxt_get_sizelimit(lc, &x) == 0) |
288 | xasprintf(&np, "%jd", x); | |
896352d3 OO |
289 | break; |
290 | case COL_BACK_MAJMIN: | |
291 | { | |
292 | dev_t dev = 0; | |
293 | if (loopcxt_get_backing_devno(lc, &dev) == 0 && dev) | |
7d5caac4 KZ |
294 | xasprintf(&np, raw || json ? "%u:%u" : "%8u:%-3u", |
295 | major(dev), minor(dev)); | |
896352d3 OO |
296 | break; |
297 | } | |
422f54c0 KZ |
298 | case COL_BACK_MAJ: |
299 | { | |
300 | dev_t dev = 0; | |
301 | if (loopcxt_get_backing_devno(lc, &dev) == 0 && dev) | |
302 | xasprintf(&np, "%u", major(dev)); | |
303 | break; | |
304 | } | |
305 | case COL_BACK_MIN: | |
306 | { | |
307 | dev_t dev = 0; | |
308 | if (loopcxt_get_backing_devno(lc, &dev) == 0 && dev) | |
309 | xasprintf(&np, "%u", minor(dev)); | |
310 | break; | |
311 | } | |
896352d3 OO |
312 | case COL_MAJMIN: |
313 | { | |
a6ca0456 | 314 | dev_t dev = loopcxt_get_devno(lc); |
422f54c0 | 315 | if (dev) |
7d5caac4 | 316 | xasprintf(&np, raw || json ? "%u:%u" :"%3u:%-3u", |
422f54c0 KZ |
317 | major(dev), minor(dev)); |
318 | break; | |
319 | } | |
320 | case COL_MAJ: { | |
a6ca0456 | 321 | dev_t dev = loopcxt_get_devno(lc); |
422f54c0 KZ |
322 | if (dev) |
323 | xasprintf(&np, "%u", major(dev)); | |
324 | break; | |
325 | } | |
326 | case COL_MIN: { | |
a6ca0456 | 327 | dev_t dev = loopcxt_get_devno(lc); |
422f54c0 KZ |
328 | if (dev) |
329 | xasprintf(&np, "%u", minor(dev)); | |
896352d3 OO |
330 | break; |
331 | } | |
332 | case COL_BACK_INO: | |
333 | { | |
334 | ino_t ino = 0; | |
335 | if (loopcxt_get_backing_inode(lc, &ino) == 0 && ino) | |
336 | xasprintf(&np, "%ju", ino); | |
896352d3 OO |
337 | break; |
338 | } | |
339 | case COL_AUTOCLR: | |
48f1f38b | 340 | p = loopcxt_is_autoclear(lc) ? "1" : "0"; |
896352d3 OO |
341 | break; |
342 | case COL_RO: | |
48f1f38b | 343 | p = loopcxt_is_readonly(lc) ? "1" : "0"; |
896352d3 | 344 | break; |
faeef4d2 ML |
345 | case COL_DIO: |
346 | p = loopcxt_is_dio(lc) ? "1" : "0"; | |
347 | break; | |
896352d3 | 348 | case COL_PARTSCAN: |
48f1f38b | 349 | p = loopcxt_is_partscan(lc) ? "1" : "0"; |
896352d3 | 350 | break; |
76493ceb | 351 | case COL_LOGSEC: |
a1a41597 SB |
352 | if (loopcxt_get_blocksize(lc, &x) == 0) |
353 | xasprintf(&np, "%jd", x); | |
354 | break; | |
db8f7815 KZ |
355 | case COL_REF: |
356 | np = loopcxt_get_refname(lc); | |
357 | break; | |
896352d3 OO |
358 | default: |
359 | return -EINVAL; | |
360 | } | |
48f1f38b KZ |
361 | |
362 | ||
363 | if (p) | |
780ce22c | 364 | rc = scols_line_set_data(ln, i, p); /* calls strdup() */ |
48f1f38b | 365 | else if (np) |
780ce22c KZ |
366 | rc = scols_line_refer_data(ln, i, np); /* only refers */ |
367 | ||
368 | if (rc) | |
369 | err(EXIT_FAILURE, _("failed to add output data")); | |
896352d3 | 370 | } |
48f1f38b | 371 | |
896352d3 OO |
372 | return 0; |
373 | } | |
374 | ||
48f1f38b | 375 | static int show_table(struct loopdev_cxt *lc, |
9f56106d KZ |
376 | const char *file, |
377 | uint64_t offset, | |
7e86cd54 | 378 | int flags) |
896352d3 OO |
379 | { |
380 | struct stat sbuf, *st = &sbuf; | |
48f1f38b | 381 | struct libscols_table *tb; |
7e86cd54 | 382 | struct libscols_line *ln; |
40b17508 KZ |
383 | int rc = 0; |
384 | size_t i; | |
896352d3 | 385 | |
710ed55d KZ |
386 | scols_init_debug(0); |
387 | ||
0925a9dd | 388 | if (!(tb = scols_new_table())) |
780ce22c | 389 | err(EXIT_FAILURE, _("failed to allocate output table")); |
0925a9dd | 390 | scols_table_enable_raw(tb, raw); |
4827093d | 391 | scols_table_enable_json(tb, json); |
0925a9dd | 392 | scols_table_enable_noheadings(tb, no_headings); |
896352d3 | 393 | |
4827093d KZ |
394 | if (json) |
395 | scols_table_set_name(tb, "loopdevices"); | |
396 | ||
e0b06769 | 397 | for (i = 0; i < ncolumns; i++) { |
37b2b3fa | 398 | const struct colinfo *ci = get_column_info(i); |
46de0fe6 | 399 | struct libscols_column *cl; |
896352d3 | 400 | |
46de0fe6 KZ |
401 | cl = scols_table_new_column(tb, ci->name, ci->whint, ci->flags); |
402 | if (!cl) | |
780ce22c | 403 | err(EXIT_FAILURE, _("failed to allocate output column")); |
46de0fe6 KZ |
404 | if (json) |
405 | scols_column_set_json_type(cl, ci->json_type); | |
896352d3 OO |
406 | } |
407 | ||
9f56106d | 408 | /* only one loopdev requested (already assigned to loopdev_cxt) */ |
896352d3 | 409 | if (loopcxt_get_device(lc)) { |
48f1f38b | 410 | ln = scols_table_new_line(tb, NULL); |
7e86cd54 | 411 | if (!ln) |
780ce22c | 412 | err(EXIT_FAILURE, _("failed to allocate output line")); |
48f1f38b | 413 | rc = set_scols_data(lc, ln); |
896352d3 | 414 | |
9f56106d | 415 | /* list all loopdevs */ |
48f1f38b KZ |
416 | } else { |
417 | char *cn_file = NULL; | |
896352d3 | 418 | |
48f1f38b KZ |
419 | rc = loopcxt_init_iterator(lc, LOOPITER_FL_USED); |
420 | if (rc) | |
421 | goto done; | |
422 | if (!file || stat(file, st)) | |
423 | st = NULL; | |
424 | ||
425 | while (loopcxt_next(lc) == 0) { | |
426 | if (file) { | |
427 | int used; | |
428 | const char *bf = cn_file ? cn_file : file; | |
6d62bc0f | 429 | |
74a4705a | 430 | used = loopcxt_is_used(lc, st, bf, offset, 0, flags); |
48f1f38b KZ |
431 | if (!used && !cn_file) { |
432 | bf = cn_file = canonicalize_path(file); | |
74a4705a | 433 | used = loopcxt_is_used(lc, st, bf, offset, 0, flags); |
48f1f38b KZ |
434 | } |
435 | if (!used) | |
436 | continue; | |
6d62bc0f | 437 | } |
48f1f38b KZ |
438 | |
439 | ln = scols_table_new_line(tb, NULL); | |
440 | if (!ln) | |
780ce22c | 441 | err(EXIT_FAILURE, _("failed to allocate output line")); |
48f1f38b KZ |
442 | rc = set_scols_data(lc, ln); |
443 | if (rc) | |
444 | break; | |
6d62bc0f | 445 | } |
896352d3 | 446 | |
48f1f38b KZ |
447 | loopcxt_deinit_iterator(lc); |
448 | free(cn_file); | |
896352d3 | 449 | } |
48f1f38b KZ |
450 | done: |
451 | if (rc == 0) | |
452 | rc = scols_print_table(tb); | |
453 | scols_unref_table(tb); | |
454 | return rc; | |
896352d3 OO |
455 | } |
456 | ||
6e1eda6f | 457 | static void __attribute__((__noreturn__)) usage(void) |
aadb9303 | 458 | { |
6e1eda6f | 459 | FILE *out = stdout; |
e0b06769 SK |
460 | size_t i; |
461 | ||
aadb9303 KZ |
462 | fputs(USAGE_HEADER, out); |
463 | ||
464 | fprintf(out, | |
465 | _(" %1$s [options] [<loopdev>]\n" | |
466 | " %1$s [options] -f | <loopdev> <file>\n"), | |
467 | program_invocation_short_name); | |
468 | ||
451dbcfa BS |
469 | fputs(USAGE_SEPARATOR, out); |
470 | fputs(_("Set up and control loop devices.\n"), out); | |
471 | ||
ec3624aa | 472 | /* commands */ |
aadb9303 | 473 | fputs(USAGE_OPTIONS, out); |
9c47f25e | 474 | fputs(_(" -a, --all list all used devices\n"), out); |
aa06617f | 475 | fputs(_(" -d, --detach <loopdev>... detach one or more devices\n"), out); |
9c47f25e BS |
476 | fputs(_(" -D, --detach-all detach all used devices\n"), out); |
477 | fputs(_(" -f, --find find first unused device\n"), out); | |
aa06617f | 478 | fputs(_(" -c, --set-capacity <loopdev> resize the device\n"), out); |
9c47f25e | 479 | fputs(_(" -j, --associated <file> list all devices associated with <file>\n"), out); |
9a94b634 | 480 | fputs(_(" -L, --nooverlap avoid possible conflict between devices\n"), out); |
9c47f25e | 481 | |
ec3624aa | 482 | /* commands options */ |
aadb9303 | 483 | fputs(USAGE_SEPARATOR, out); |
59a4ed11 | 484 | fputs(_(" -o, --offset <num> start at offset <num> into file\n"), out); |
aa06617f | 485 | fputs(_(" --sizelimit <num> device is limited to <num> bytes of the file\n"), out); |
ec06412c | 486 | fputs(_(" -b, --sector-size <num> set the logical sector size to <num>\n"), out); |
aa06617f BS |
487 | fputs(_(" -P, --partscan create a partitioned loop device\n"), out); |
488 | fputs(_(" -r, --read-only set up a read-only loop device\n"), out); | |
f98d9641 | 489 | fputs(_(" --direct-io[=<on|off>] open backing file with O_DIRECT\n"), out); |
db8f7815 | 490 | fputs(_(" --loop-ref <string> loop device reference\n"), out); |
59a4ed11 SK |
491 | fputs(_(" --show print device name after setup (with -f)\n"), out); |
492 | fputs(_(" -v, --verbose verbose mode\n"), out); | |
aadb9303 | 493 | |
ec3624aa | 494 | /* output options */ |
9f56106d | 495 | fputs(USAGE_SEPARATOR, out); |
ec3624aa | 496 | fputs(_(" -J, --json use JSON --list output format\n"), out); |
14576644 | 497 | fputs(_(" -l, --list list info about all or specified (default)\n"), out); |
0d0d12ad | 498 | fputs(_(" -n, --noheadings don't print headings for --list output\n"), out); |
ec3624aa | 499 | fputs(_(" -O, --output <cols> specify columns to output for --list\n"), out); |
289673b1 | 500 | fputs(_(" --output-all output all columns\n"), out); |
9f56106d KZ |
501 | fputs(_(" --raw use raw --list output format\n"), out); |
502 | ||
aadb9303 | 503 | fputs(USAGE_SEPARATOR, out); |
bad4c729 | 504 | fprintf(out, USAGE_HELP_OPTIONS(31)); |
aadb9303 | 505 | |
c3a4cfc5 | 506 | fputs(USAGE_COLUMNS, out); |
d78deddc | 507 | for (i = 0; i < ARRAY_SIZE(infos); i++) |
896352d3 OO |
508 | fprintf(out, " %12s %s\n", infos[i].name, _(infos[i].help)); |
509 | ||
bad4c729 | 510 | fprintf(out, USAGE_MAN_TAIL("losetup(8)")); |
6997468e | 511 | |
6e1eda6f | 512 | exit(EXIT_SUCCESS); |
aadb9303 | 513 | } |
22853e4a | 514 | |
6daf185c | 515 | static void warn_size(const char *filename, uint64_t size, uint64_t offset, int flags) |
35545456 KZ |
516 | { |
517 | struct stat st; | |
518 | ||
519 | if (!size) { | |
b048b8af | 520 | if (stat(filename, &st) || S_ISBLK(st.st_mode)) |
35545456 KZ |
521 | return; |
522 | size = st.st_size; | |
6daf185c KZ |
523 | |
524 | if (flags & LOOPDEV_FL_OFFSET) | |
525 | size -= offset; | |
35545456 KZ |
526 | } |
527 | ||
528 | if (size < 512) | |
97b820bf BS |
529 | warnx(_("%s: Warning: file is smaller than 512 bytes; the loop device " |
530 | "may be useless or invisible for system tools."), | |
35545456 KZ |
531 | filename); |
532 | else if (size % 512) | |
6f3f2243 KZ |
533 | warnx(_("%s: Warning: file does not end on a 512-byte sector boundary; " |
534 | "the remaining end of the file will be ignored."), | |
35545456 KZ |
535 | filename); |
536 | } | |
537 | ||
af9fc22d TW |
538 | static int find_unused(struct loopdev_cxt *lc) |
539 | { | |
540 | int rc; | |
541 | ||
542 | rc = loopcxt_find_unused(lc); | |
543 | if (!rc) | |
544 | return 0; | |
545 | ||
546 | if (access(_PATH_DEV_LOOPCTL, F_OK) == 0 && | |
547 | access(_PATH_DEV_LOOPCTL, W_OK) != 0) | |
548 | ; | |
549 | else | |
550 | errno = -rc; | |
551 | ||
552 | warn(_("cannot find an unused loop device")); | |
553 | ||
554 | return rc; | |
555 | } | |
556 | ||
9a94b634 KZ |
557 | static int create_loop(struct loopdev_cxt *lc, |
558 | int nooverlap, int lo_flags, int flags, | |
db8f7815 KZ |
559 | const char *file, const char *refname, |
560 | uint64_t offset, uint64_t sizelimit, | |
422f0e9f | 561 | uint64_t blocksize) |
9a94b634 KZ |
562 | { |
563 | int hasdev = loopcxt_has_device(lc); | |
3ff6fb80 | 564 | int rc = 0, ntries = 0; |
9a94b634 | 565 | |
d8ba61fc | 566 | /* losetup --find --noverlap file.img */ |
9a94b634 KZ |
567 | if (!hasdev && nooverlap) { |
568 | rc = loopcxt_find_overlap(lc, file, offset, sizelimit); | |
569 | switch (rc) { | |
570 | case 0: /* not found */ | |
571 | break; | |
572 | ||
573 | case 1: /* overlap */ | |
574 | loopcxt_deinit(lc); | |
575 | errx(EXIT_FAILURE, _("%s: overlapping loop device exists"), file); | |
576 | ||
577 | case 2: /* overlap -- full size and offset match (reuse) */ | |
578 | { | |
579 | uint32_t lc_encrypt_type; | |
580 | ||
581 | /* Once a loop is initialized RO, there is no | |
582 | * way to change its parameters. */ | |
583 | if (loopcxt_is_readonly(lc) | |
584 | && !(lo_flags & LO_FLAGS_READ_ONLY)) { | |
585 | loopcxt_deinit(lc); | |
586 | errx(EXIT_FAILURE, _("%s: overlapping read-only loop device exists"), file); | |
587 | } | |
588 | ||
589 | /* This is no more supported, but check to be safe. */ | |
590 | if (loopcxt_get_encrypt_type(lc, &lc_encrypt_type) == 0 | |
591 | && lc_encrypt_type != LO_CRYPT_NONE) { | |
592 | loopcxt_deinit(lc); | |
593 | errx(EXIT_FAILURE, _("%s: overlapping encrypted loop device exists"), file); | |
594 | } | |
f27d989c | 595 | |
d5fd456c | 596 | lc->config.info.lo_flags &= ~LO_FLAGS_AUTOCLEAR; |
9fcc8936 | 597 | if (loopcxt_ioctl_status(lc)) { |
f27d989c SB |
598 | loopcxt_deinit(lc); |
599 | errx(EXIT_FAILURE, _("%s: failed to re-use loop device"), file); | |
600 | } | |
9a94b634 KZ |
601 | return 0; /* success, re-use */ |
602 | } | |
603 | default: /* error */ | |
604 | loopcxt_deinit(lc); | |
605 | errx(EXIT_FAILURE, _("failed to inspect loop devices")); | |
606 | return -errno; | |
607 | } | |
608 | } | |
609 | ||
dfa92ef1 | 610 | if (hasdev) |
9a94b634 KZ |
611 | loopcxt_add_device(lc); |
612 | ||
d8ba61fc KZ |
613 | /* losetup --noverlap /dev/loopN file.img */ |
614 | if (hasdev && nooverlap) { | |
615 | struct loopdev_cxt lc2; | |
616 | ||
617 | if (loopcxt_init(&lc2, 0)) { | |
618 | loopcxt_deinit(lc); | |
619 | err(EXIT_FAILURE, _("failed to initialize loopcxt")); | |
620 | } | |
621 | rc = loopcxt_find_overlap(&lc2, file, offset, sizelimit); | |
622 | loopcxt_deinit(&lc2); | |
623 | ||
624 | if (rc) { | |
625 | loopcxt_deinit(lc); | |
626 | if (rc > 0) | |
627 | errx(EXIT_FAILURE, _("%s: overlapping loop device exists"), file); | |
628 | err(EXIT_FAILURE, _("%s: failed to check for conflicting loop devices"), file); | |
629 | } | |
630 | } | |
631 | ||
9a94b634 KZ |
632 | /* Create a new device */ |
633 | do { | |
634 | const char *errpre; | |
635 | ||
636 | /* Note that loopcxt_{find_unused,set_device}() resets | |
637 | * loopcxt struct. | |
638 | */ | |
af9fc22d | 639 | if (!hasdev && (rc = find_unused(lc))) |
9a94b634 | 640 | break; |
9a94b634 KZ |
641 | if (flags & LOOPDEV_FL_OFFSET) |
642 | loopcxt_set_offset(lc, offset); | |
643 | if (flags & LOOPDEV_FL_SIZELIMIT) | |
644 | loopcxt_set_sizelimit(lc, sizelimit); | |
645 | if (lo_flags) | |
646 | loopcxt_set_flags(lc, lo_flags); | |
422f0e9f KZ |
647 | if (blocksize > 0) |
648 | loopcxt_set_blocksize(lc, blocksize); | |
db8f7815 KZ |
649 | if (refname && (rc = loopcxt_set_refname(lc, refname))) { |
650 | warnx(_("cannot set loop reference string")); | |
651 | break; | |
652 | } | |
9a94b634 KZ |
653 | if ((rc = loopcxt_set_backing_file(lc, file))) { |
654 | warn(_("%s: failed to use backing file"), file); | |
655 | break; | |
656 | } | |
657 | errno = 0; | |
658 | rc = loopcxt_setup_device(lc); | |
659 | if (rc == 0) | |
660 | break; /* success */ | |
3ff6fb80 | 661 | |
3e03cb68 | 662 | if ((errno == EBUSY || errno == EAGAIN) && !hasdev && ntries < 64) { |
3ff6fb80 KZ |
663 | xusleep(200000); |
664 | ntries++; | |
9a94b634 | 665 | continue; |
3ff6fb80 | 666 | } |
9a94b634 KZ |
667 | |
668 | /* errors */ | |
a6ca0456 | 669 | errpre = hasdev && lc->fd < 0 ? |
9a94b634 KZ |
670 | loopcxt_get_device(lc) : file; |
671 | warn(_("%s: failed to set up loop device"), errpre); | |
672 | break; | |
673 | } while (hasdev == 0); | |
674 | ||
675 | return rc; | |
676 | } | |
677 | ||
39fde137 KZ |
678 | int main(int argc, char **argv) |
679 | { | |
680 | struct loopdev_cxt lc; | |
9a94b634 | 681 | int act = 0, flags = 0, no_overlap = 0, c; |
db8f7815 | 682 | char *file = NULL, *refname = NULL; |
a1a41597 | 683 | uint64_t offset = 0, sizelimit = 0, blocksize = 0; |
7e86cd54 | 684 | int res = 0, showdev = 0, lo_flags = 0; |
896352d3 OO |
685 | char *outarg = NULL; |
686 | int list = 0; | |
a1a41597 | 687 | unsigned long use_dio = 0, set_dio = 0, set_blocksize = 0; |
6c7d5ae9 | 688 | |
aadb9303 KZ |
689 | enum { |
690 | OPT_SIZELIMIT = CHAR_MAX + 1, | |
9f56106d | 691 | OPT_SHOW, |
64c3bb3c | 692 | OPT_RAW, |
db8f7815 | 693 | OPT_REF, |
289673b1 SK |
694 | OPT_DIO, |
695 | OPT_OUTPUT_ALL | |
aadb9303 KZ |
696 | }; |
697 | static const struct option longopts[] = { | |
87918040 SK |
698 | { "all", no_argument, NULL, 'a' }, |
699 | { "set-capacity", required_argument, NULL, 'c' }, | |
700 | { "detach", required_argument, NULL, 'd' }, | |
701 | { "detach-all", no_argument, NULL, 'D' }, | |
702 | { "find", no_argument, NULL, 'f' }, | |
703 | { "nooverlap", no_argument, NULL, 'L' }, | |
704 | { "help", no_argument, NULL, 'h' }, | |
705 | { "associated", required_argument, NULL, 'j' }, | |
706 | { "json", no_argument, NULL, 'J' }, | |
707 | { "list", no_argument, NULL, 'l' }, | |
76493ceb | 708 | { "sector-size", required_argument, NULL, 'b' }, |
87918040 SK |
709 | { "noheadings", no_argument, NULL, 'n' }, |
710 | { "offset", required_argument, NULL, 'o' }, | |
711 | { "output", required_argument, NULL, 'O' }, | |
289673b1 | 712 | { "output-all", no_argument, NULL, OPT_OUTPUT_ALL }, |
87918040 SK |
713 | { "sizelimit", required_argument, NULL, OPT_SIZELIMIT }, |
714 | { "partscan", no_argument, NULL, 'P' }, | |
715 | { "read-only", no_argument, NULL, 'r' }, | |
716 | { "direct-io", optional_argument, NULL, OPT_DIO }, | |
717 | { "raw", no_argument, NULL, OPT_RAW }, | |
db8f7815 | 718 | { "loop-ref", required_argument, NULL, OPT_REF, }, |
87918040 SK |
719 | { "show", no_argument, NULL, OPT_SHOW }, |
720 | { "verbose", no_argument, NULL, 'v' }, | |
721 | { "version", no_argument, NULL, 'V' }, | |
722 | { NULL, 0, NULL, 0 } | |
d99f0140 | 723 | }; |
22853e4a | 724 | |
c1ac3144 KZ |
725 | static const ul_excl_t excl[] = { /* rows and cols in ASCII order */ |
726 | { 'D','a','c','d','f','j' }, | |
896352d3 | 727 | { 'D','c','d','f','l' }, |
65178cb3 | 728 | { 'D','c','d','f','O' }, |
4827093d | 729 | { 'J',OPT_RAW }, |
c1ac3144 KZ |
730 | { 0 } |
731 | }; | |
732 | int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT; | |
733 | ||
22853e4a KZ |
734 | setlocale(LC_ALL, ""); |
735 | bindtextdomain(PACKAGE, LOCALEDIR); | |
736 | textdomain(PACKAGE); | |
25b7045e | 737 | close_stdout_atexit(); |
22853e4a | 738 | |
defa0710 KZ |
739 | if (loopcxt_init(&lc, 0)) |
740 | err(EXIT_FAILURE, _("failed to initialize loopcxt")); | |
741 | ||
a1a41597 | 742 | while ((c = getopt_long(argc, argv, "ab:c:d:Dfhj:JlLno:O:PrvV", |
d99f0140 | 743 | longopts, NULL)) != -1) { |
c1ac3144 KZ |
744 | |
745 | err_exclusive_options(c, longopts, excl, excl_st); | |
746 | ||
22853e4a | 747 | switch (c) { |
8b125fae | 748 | case 'a': |
39fde137 | 749 | act = A_SHOW; |
8b125fae | 750 | break; |
a1a41597 SB |
751 | case 'b': |
752 | set_blocksize = 1; | |
753 | blocksize = strtosize_or_err(optarg, _("failed to parse logical block size")); | |
754 | break; | |
d34ac93a | 755 | case 'c': |
6e90a44c | 756 | act = A_SET_CAPACITY; |
a6ca0456 | 757 | if (loopcxt_set_device(&lc, optarg)) |
defa0710 KZ |
758 | err(EXIT_FAILURE, _("%s: failed to use device"), |
759 | optarg); | |
d34ac93a | 760 | break; |
faf142b6 | 761 | case 'r': |
c7e0925d | 762 | lo_flags |= LO_FLAGS_READ_ONLY; |
faf142b6 | 763 | break; |
db8f7815 KZ |
764 | case OPT_REF: |
765 | refname = optarg; | |
766 | break; | |
22853e4a | 767 | case 'd': |
c654c4f0 | 768 | act = A_DELETE; |
a6ca0456 | 769 | if (loopcxt_set_device(&lc, optarg)) |
defa0710 KZ |
770 | err(EXIT_FAILURE, _("%s: failed to use device"), |
771 | optarg); | |
22853e4a | 772 | break; |
34f9b684 | 773 | case 'D': |
c654c4f0 | 774 | act = A_DELETE_ALL; |
34f9b684 | 775 | break; |
d162fcb5 | 776 | case 'f': |
bcdbdc72 | 777 | act = A_FIND_FREE; |
d162fcb5 | 778 | break; |
4827093d KZ |
779 | case 'J': |
780 | json = 1; | |
781 | break; | |
259fcc57 | 782 | case 'j': |
bc0ac075 KZ |
783 | act = A_SHOW; |
784 | file = optarg; | |
259fcc57 | 785 | break; |
896352d3 OO |
786 | case 'l': |
787 | list = 1; | |
788 | break; | |
9a94b634 KZ |
789 | case 'L': |
790 | no_overlap = 1; | |
791 | break; | |
9f56106d | 792 | case 'n': |
7e86cd54 | 793 | no_headings = 1; |
9f56106d KZ |
794 | break; |
795 | case OPT_RAW: | |
7e86cd54 | 796 | raw = 1; |
9f56106d | 797 | break; |
22853e4a | 798 | case 'o': |
e9e426eb | 799 | offset = strtosize_or_err(optarg, _("failed to parse offset")); |
bc0ac075 | 800 | flags |= LOOPDEV_FL_OFFSET; |
22853e4a | 801 | break; |
896352d3 OO |
802 | case 'O': |
803 | outarg = optarg; | |
65178cb3 | 804 | list = 1; |
896352d3 | 805 | break; |
289673b1 | 806 | case OPT_OUTPUT_ALL: |
cdc69063 | 807 | list = 1; |
289673b1 SK |
808 | for (ncolumns = 0; ncolumns < ARRAY_SIZE(infos); ncolumns++) |
809 | columns[ncolumns] = ncolumns; | |
810 | break; | |
916bf85e KZ |
811 | case 'P': |
812 | lo_flags |= LO_FLAGS_PARTSCAN; | |
813 | break; | |
aadb9303 | 814 | case OPT_SHOW: |
ba3809b0 KZ |
815 | showdev = 1; |
816 | break; | |
64c3bb3c | 817 | case OPT_DIO: |
f98d9641 KZ |
818 | use_dio = set_dio = 1; |
819 | if (optarg) | |
820 | use_dio = parse_switch(optarg, _("argument error"), "on", "off", NULL); | |
d53346ed AXH |
821 | if (use_dio) |
822 | lo_flags |= LO_FLAGS_DIRECT_IO; | |
64c3bb3c | 823 | break; |
22853e4a | 824 | case 'v': |
22853e4a | 825 | break; |
aadb9303 | 826 | case OPT_SIZELIMIT: /* --sizelimit */ |
e9e426eb | 827 | sizelimit = strtosize_or_err(optarg, _("failed to parse size")); |
c7e0925d | 828 | flags |= LOOPDEV_FL_SIZELIMIT; |
7bcefc7f | 829 | break; |
2c308875 KZ |
830 | |
831 | case 'h': | |
832 | usage(); | |
833 | case 'V': | |
834 | print_version(EXIT_SUCCESS); | |
22853e4a | 835 | default: |
677ec86c | 836 | errtryhelp(EXIT_FAILURE); |
22853e4a KZ |
837 | } |
838 | } | |
d162fcb5 | 839 | |
bcf445fd KZ |
840 | ul_path_init_debug(); |
841 | ul_sysfs_init_debug(); | |
842 | ||
896352d3 OO |
843 | /* default is --list --all */ |
844 | if (argc == 1) { | |
845 | act = A_SHOW; | |
846 | list = 1; | |
847 | } | |
848 | ||
4827093d KZ |
849 | if (!act && argc == 2 && (raw || json)) { |
850 | act = A_SHOW; | |
851 | list = 1; | |
852 | } | |
853 | ||
896352d3 OO |
854 | /* default --list output columns */ |
855 | if (list && !ncolumns) { | |
856 | columns[ncolumns++] = COL_NAME; | |
4ad996d7 | 857 | columns[ncolumns++] = COL_SIZELIMIT; |
896352d3 OO |
858 | columns[ncolumns++] = COL_OFFSET; |
859 | columns[ncolumns++] = COL_AUTOCLR; | |
860 | columns[ncolumns++] = COL_RO; | |
861 | columns[ncolumns++] = COL_BACK_FILE; | |
faeef4d2 | 862 | columns[ncolumns++] = COL_DIO; |
76493ceb | 863 | columns[ncolumns++] = COL_LOGSEC; |
896352d3 | 864 | } |
39fde137 | 865 | |
c7e0925d KZ |
866 | if (act == A_FIND_FREE && optind < argc) { |
867 | /* | |
868 | * losetup -f <backing_file> | |
869 | */ | |
870 | act = A_CREATE; | |
871 | file = argv[optind++]; | |
c3f5a0f1 KZ |
872 | |
873 | if (optind < argc) | |
874 | errx(EXIT_FAILURE, _("unexpected arguments")); | |
c7e0925d | 875 | } |
896352d3 OO |
876 | |
877 | if (list && !act && optind == argc) | |
878 | /* | |
879 | * losetup --list defaults to --all | |
880 | */ | |
881 | act = A_SHOW; | |
882 | ||
09ec0c0a KZ |
883 | if (!act && optind + 1 == argc) { |
884 | /* | |
896352d3 | 885 | * losetup [--list] <device> |
64c3bb3c | 886 | * OR |
a1a41597 | 887 | * losetup {--direct-io[=off]|--logical-blocksize=size}... <device> |
09ec0c0a | 888 | */ |
5b3bb7da | 889 | if (set_dio) { |
64c3bb3c | 890 | act = A_SET_DIRECT_IO; |
5b3bb7da KZ |
891 | lo_flags &= ~LO_FLAGS_DIRECT_IO; |
892 | } else if (set_blocksize) | |
a1a41597 | 893 | act = A_SET_BLOCKSIZE; |
5b3bb7da KZ |
894 | else |
895 | act = A_SHOW_ONE; | |
896 | ||
a6ca0456 | 897 | if (loopcxt_set_device(&lc, argv[optind])) |
defa0710 KZ |
898 | err(EXIT_FAILURE, _("%s: failed to use device"), |
899 | argv[optind]); | |
900 | optind++; | |
09ec0c0a | 901 | } |
c7e0925d KZ |
902 | if (!act) { |
903 | /* | |
904 | * losetup <loopdev> <backing_file> | |
905 | */ | |
906 | act = A_CREATE; | |
907 | ||
908 | if (optind >= argc) | |
909 | errx(EXIT_FAILURE, _("no loop device specified")); | |
21ce3f3a | 910 | /* don't use is_loopdev() here, the device does not have exist yet */ |
defa0710 | 911 | if (loopcxt_set_device(&lc, argv[optind])) |
e9e7698e | 912 | err(EXIT_FAILURE, _("%s: failed to use device"), |
defa0710 KZ |
913 | argv[optind]); |
914 | optind++; | |
c7e0925d KZ |
915 | |
916 | if (optind >= argc) | |
917 | errx(EXIT_FAILURE, _("no file specified")); | |
918 | file = argv[optind++]; | |
919 | } | |
920 | ||
921 | if (act != A_CREATE && | |
5cf05c71 | 922 | (sizelimit || lo_flags || showdev)) |
c7e0925d | 923 | errx(EXIT_FAILURE, |
136b23ef | 924 | _("the options %s are allowed during loop device setup only"), |
014e7eb3 | 925 | "--{sizelimit,partscan,read-only,show}"); |
c7e0925d | 926 | |
934df30d KZ |
927 | if ((flags & LOOPDEV_FL_OFFSET) && |
928 | act != A_CREATE && (act != A_SHOW || !file)) | |
136b23ef | 929 | errx(EXIT_FAILURE, _("the option --offset is not allowed in this context")); |
c654c4f0 | 930 | |
896352d3 OO |
931 | if (outarg && string_add_to_idarray(outarg, columns, ARRAY_SIZE(columns), |
932 | &ncolumns, column_name_to_id) < 0) | |
933 | return EXIT_FAILURE; | |
934 | ||
39fde137 | 935 | switch (act) { |
c7e0925d | 936 | case A_CREATE: |
db8f7815 | 937 | res = create_loop(&lc, no_overlap, lo_flags, flags, file, refname, |
422f0e9f | 938 | offset, sizelimit, blocksize); |
35545456 KZ |
939 | if (res == 0) { |
940 | if (showdev) | |
941 | printf("%s\n", loopcxt_get_device(&lc)); | |
6daf185c | 942 | warn_size(file, sizelimit, offset, flags); |
35545456 | 943 | } |
c7e0925d | 944 | break; |
c654c4f0 KZ |
945 | case A_DELETE: |
946 | res = delete_loop(&lc); | |
947 | while (optind < argc) { | |
a6ca0456 | 948 | if (loopcxt_set_device(&lc, argv[optind])) |
defa0710 KZ |
949 | warn(_("%s: failed to use device"), |
950 | argv[optind]); | |
951 | optind++; | |
c654c4f0 KZ |
952 | res += delete_loop(&lc); |
953 | } | |
954 | break; | |
955 | case A_DELETE_ALL: | |
956 | res = delete_all_loops(&lc); | |
957 | break; | |
bcdbdc72 | 958 | case A_FIND_FREE: |
af9fc22d TW |
959 | res = find_unused(&lc); |
960 | if (!res) | |
556dac80 JB |
961 | printf("%s%s\n", loopcxt_get_device(&lc), |
962 | loopcxt_is_lost(&lc) ? " (lost)" : ""); | |
bcdbdc72 | 963 | break; |
39fde137 | 964 | case A_SHOW: |
896352d3 | 965 | if (list) |
48f1f38b | 966 | res = show_table(&lc, file, offset, flags); |
896352d3 OO |
967 | else |
968 | res = show_all_loops(&lc, file, offset, flags); | |
bc0ac075 | 969 | break; |
09ec0c0a | 970 | case A_SHOW_ONE: |
896352d3 | 971 | if (list) |
48f1f38b | 972 | res = show_table(&lc, NULL, 0, 0); |
896352d3 OO |
973 | else |
974 | res = printf_loopdev(&lc); | |
09ec0c0a | 975 | if (res) |
136b23ef | 976 | warn("%s", loopcxt_get_device(&lc)); |
09ec0c0a | 977 | break; |
6e90a44c | 978 | case A_SET_CAPACITY: |
9fcc8936 | 979 | res = loopcxt_ioctl_capacity(&lc); |
293714c0 JM |
980 | if (res) |
981 | warn(_("%s: set capacity failed"), | |
982 | loopcxt_get_device(&lc)); | |
6e90a44c | 983 | break; |
64c3bb3c | 984 | case A_SET_DIRECT_IO: |
422f0e9f KZ |
985 | res = loopcxt_ioctl_dio(&lc, use_dio); |
986 | if (res) | |
987 | warn(_("%s: set direct io failed"), | |
988 | loopcxt_get_device(&lc)); | |
989 | break; | |
a1a41597 | 990 | case A_SET_BLOCKSIZE: |
422f0e9f KZ |
991 | res = loopcxt_ioctl_blocksize(&lc, blocksize); |
992 | if (res) | |
993 | warn(_("%s: set logical block size failed"), | |
994 | loopcxt_get_device(&lc)); | |
64c3bb3c | 995 | break; |
39fde137 | 996 | default: |
6e1eda6f RM |
997 | warnx(_("bad usage")); |
998 | errtryhelp(EXIT_FAILURE); | |
39fde137 KZ |
999 | break; |
1000 | } | |
1001 | ||
a6ca0456 | 1002 | if (res && (act == A_SET_CAPACITY |
556dac80 | 1003 | || act == A_CREATE |
a6ca0456 JB |
1004 | || act == A_SET_DIRECT_IO |
1005 | || act == A_SET_BLOCKSIZE) | |
1006 | && loopcxt_is_lost(&lc)) | |
1007 | warn_lost(&lc); | |
1008 | ||
39fde137 | 1009 | loopcxt_deinit(&lc); |
c7e0925d | 1010 | return res ? EXIT_FAILURE : EXIT_SUCCESS; |
22853e4a | 1011 | } |