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6e876a98 KZ |
1 | #ifdef HAVE_LIBBLKID |
2 | # include <blkid.h> | |
3 | #endif | |
823f0fd1 | 4 | |
b9da1532 | 5 | #include "blkdev.h" |
5ecd6185 KZ |
6 | #ifdef __linux__ |
7 | # include "partx.h" | |
8 | #endif | |
b9da1532 | 9 | #include "loopdev.h" |
f4be9e2b | 10 | #include "fdiskP.h" |
f7b1f75e | 11 | |
5175ae87 KZ |
12 | |
13 | /** | |
14 | * SECTION: context | |
705854f3 KZ |
15 | * @title: Context |
16 | * @short_description: stores info about device, labels etc. | |
5175ae87 | 17 | * |
7190b9b2 | 18 | * The library distinguish between three types of partitioning objects. |
5175ae87 KZ |
19 | * |
20 | * on-disk data | |
7190b9b2 KZ |
21 | * - disk label specific |
22 | * - probed and read by disklabel drivers when assign device to the context | |
23 | * or when switch to another disk label type | |
24 | * - only fdisk_write_disklabel() modify on-disk data | |
5175ae87 KZ |
25 | * |
26 | * in-memory data | |
7190b9b2 KZ |
27 | * - generic data and disklabel specific data stored in struct fdisk_label |
28 | * - all partitioning operations are based on in-memory data only | |
5175ae87 KZ |
29 | * |
30 | * struct fdisk_partition | |
7190b9b2 KZ |
31 | * - provides abstraction to present partitions to users |
32 | * - fdisk_partition is possible to gather to fdisk_table container | |
33 | * - used as unified template for new partitions | |
34 | * - the struct fdisk_partition is always completely independent object and | |
35 | * any change to the object has no effect to in-memory (or on-disk) label data | |
5175ae87 KZ |
36 | */ |
37 | ||
6a632136 KZ |
38 | /** |
39 | * fdisk_new_context: | |
40 | * | |
41 | * Returns: newly allocated libfdisk handler | |
42 | */ | |
4e0e8253 | 43 | struct fdisk_context *fdisk_new_context(void) |
0c5d095e KZ |
44 | { |
45 | struct fdisk_context *cxt; | |
0c5d095e KZ |
46 | |
47 | cxt = calloc(1, sizeof(*cxt)); | |
48 | if (!cxt) | |
49 | return NULL; | |
50 | ||
d71bd2f0 | 51 | DBG(CXT, ul_debugobj(cxt, "alloc")); |
4e0e8253 | 52 | cxt->dev_fd = -1; |
c7119037 | 53 | cxt->refcount = 1; |
4e0e8253 | 54 | |
131e38a2 KZ |
55 | INIT_LIST_HEAD(&cxt->wipes); |
56 | ||
0c5d095e KZ |
57 | /* |
58 | * Allocate label specific structs. | |
59 | * | |
60 | * This is necessary (for example) to store label specific | |
61 | * context setting. | |
62 | */ | |
63 | cxt->labels[ cxt->nlabels++ ] = fdisk_new_gpt_label(cxt); | |
64 | cxt->labels[ cxt->nlabels++ ] = fdisk_new_dos_label(cxt); | |
b4fb2a61 | 65 | cxt->labels[ cxt->nlabels++ ] = fdisk_new_bsd_label(cxt); |
0c5d095e KZ |
66 | cxt->labels[ cxt->nlabels++ ] = fdisk_new_sgi_label(cxt); |
67 | cxt->labels[ cxt->nlabels++ ] = fdisk_new_sun_label(cxt); | |
68 | ||
7095232d KZ |
69 | bindtextdomain(LIBFDISK_TEXTDOMAIN, LOCALEDIR); |
70 | ||
0c5d095e KZ |
71 | return cxt; |
72 | } | |
73 | ||
13633a81 | 74 | static int init_nested_from_parent(struct fdisk_context *cxt, int isnew) |
11eee4c4 KZ |
75 | { |
76 | struct fdisk_context *parent; | |
77 | ||
78 | assert(cxt); | |
79 | assert(cxt->parent); | |
80 | ||
81 | parent = cxt->parent; | |
82 | ||
11eee4c4 KZ |
83 | cxt->alignment_offset = parent->alignment_offset; |
84 | cxt->ask_cb = parent->ask_cb; | |
85 | cxt->ask_data = parent->ask_data; | |
86 | cxt->dev_fd = parent->dev_fd; | |
87 | cxt->first_lba = parent->first_lba; | |
88 | cxt->firstsector_bufsz = parent->firstsector_bufsz; | |
89 | cxt->firstsector = parent->firstsector; | |
90 | cxt->geom = parent->geom; | |
91 | cxt->grain = parent->grain; | |
92 | cxt->io_size = parent->io_size; | |
93 | cxt->last_lba = parent->last_lba; | |
94 | cxt->min_io_size = parent->min_io_size; | |
95 | cxt->optimal_io_size = parent->optimal_io_size; | |
96 | cxt->phy_sector_size = parent->phy_sector_size; | |
97 | cxt->readonly = parent->readonly; | |
98 | cxt->script = parent->script; | |
99 | fdisk_ref_script(cxt->script); | |
100 | cxt->sector_size = parent->sector_size; | |
101 | cxt->total_sectors = parent->total_sectors; | |
102 | cxt->user_geom = parent->user_geom; | |
103 | cxt->user_log_sector = parent->user_log_sector; | |
104 | cxt->user_pyh_sector = parent->user_pyh_sector; | |
105 | ||
3457d90e | 106 | /* parent <--> nested independent setting, initialize for new nested |
11eee4c4 KZ |
107 | * contexts only */ |
108 | if (isnew) { | |
109 | cxt->listonly = parent->listonly; | |
110 | cxt->display_details = parent->display_details; | |
111 | cxt->display_in_cyl_units = parent->display_in_cyl_units; | |
3457d90e | 112 | cxt->protect_bootbits = parent->protect_bootbits; |
11eee4c4 KZ |
113 | } |
114 | ||
745801e4 KZ |
115 | free(cxt->dev_model); |
116 | cxt->dev_model = NULL; | |
117 | cxt->dev_model_probed = 0; | |
118 | ||
13633a81 KZ |
119 | free(cxt->dev_path); |
120 | cxt->dev_path = NULL; | |
121 | ||
122 | if (parent->dev_path) { | |
123 | cxt->dev_path = strdup(parent->dev_path); | |
124 | if (!cxt->dev_path) | |
125 | return -ENOMEM; | |
126 | } | |
127 | ||
131e38a2 KZ |
128 | INIT_LIST_HEAD(&cxt->wipes); |
129 | ||
13633a81 | 130 | return 0; |
11eee4c4 KZ |
131 | } |
132 | ||
6a632136 KZ |
133 | /** |
134 | * fdisk_new_nested_context: | |
135 | * @parent: parental context | |
136 | * @name: optional label name (e.g. "bsd") | |
137 | * | |
11eee4c4 KZ |
138 | * Create a new nested fdisk context for nested disk labels (e.g. BSD or PMBR). |
139 | * The function also probes for the nested label on the device if device is | |
140 | * already assigned to parent. | |
141 | * | |
142 | * The new context is initialized according to @parent and both context shares | |
143 | * some settings and file descriptor to the device. The child propagate some | |
144 | * changes (like fdisk_assign_device()) to parent, but it does not work | |
145 | * vice-versa. The behavior is undefined if you assign another device to | |
146 | * parent. | |
6a632136 | 147 | * |
11eee4c4 | 148 | * Returns: new context for nested partition table. |
6a632136 | 149 | */ |
01b20713 KZ |
150 | struct fdisk_context *fdisk_new_nested_context(struct fdisk_context *parent, |
151 | const char *name) | |
152 | { | |
153 | struct fdisk_context *cxt; | |
8a9256f9 | 154 | struct fdisk_label *lb = NULL; |
01b20713 KZ |
155 | |
156 | assert(parent); | |
01b20713 KZ |
157 | |
158 | cxt = calloc(1, sizeof(*cxt)); | |
159 | if (!cxt) | |
160 | return NULL; | |
161 | ||
4a79a8f1 | 162 | DBG(CXT, ul_debugobj(parent, "alloc nested [%p] [name=%s]", cxt, name)); |
c7119037 | 163 | cxt->refcount = 1; |
01b20713 | 164 | |
11eee4c4 KZ |
165 | fdisk_ref_context(parent); |
166 | cxt->parent = parent; | |
b720e0d7 | 167 | |
9c321dfb KZ |
168 | if (init_nested_from_parent(cxt, 1) != 0) { |
169 | cxt->parent = NULL; | |
170 | fdisk_unref_context(cxt); | |
13633a81 | 171 | return NULL; |
9c321dfb | 172 | } |
01b20713 | 173 | |
d17c584a | 174 | if (name) { |
4a79a8f1 | 175 | if (strcasecmp(name, "bsd") == 0) |
d17c584a | 176 | lb = cxt->labels[ cxt->nlabels++ ] = fdisk_new_bsd_label(cxt); |
4a79a8f1 | 177 | else if (strcasecmp(name, "dos") == 0 || strcasecmp(name, "mbr") == 0) |
d17c584a KZ |
178 | lb = cxt->labels[ cxt->nlabels++ ] = fdisk_new_dos_label(cxt); |
179 | } | |
8a9256f9 | 180 | |
11eee4c4 | 181 | if (lb && parent->dev_fd >= 0) { |
d71bd2f0 | 182 | DBG(CXT, ul_debugobj(cxt, "probing for nested %s", lb->name)); |
8a9256f9 KZ |
183 | |
184 | cxt->label = lb; | |
185 | ||
186 | if (lb->op->probe(cxt) == 1) | |
6a632136 | 187 | __fdisk_switch_label(cxt, lb); |
8a9256f9 | 188 | else { |
d71bd2f0 | 189 | DBG(CXT, ul_debugobj(cxt, "not found %s label", lb->name)); |
8a9256f9 KZ |
190 | if (lb->op->deinit) |
191 | lb->op->deinit(lb); | |
192 | cxt->label = NULL; | |
193 | } | |
194 | } | |
01b20713 KZ |
195 | |
196 | return cxt; | |
197 | } | |
198 | ||
199 | ||
62a9ef3e KZ |
200 | /** |
201 | * fdisk_ref_context: | |
202 | * @cxt: context pointer | |
203 | * | |
7190b9b2 | 204 | * Increments reference counter. |
62a9ef3e KZ |
205 | */ |
206 | void fdisk_ref_context(struct fdisk_context *cxt) | |
207 | { | |
208 | if (cxt) | |
209 | cxt->refcount++; | |
210 | } | |
211 | ||
6a632136 KZ |
212 | /** |
213 | * fdisk_get_label: | |
214 | * @cxt: context instance | |
215 | * @name: label name (e.g. "gpt") | |
216 | * | |
217 | * If no @name specified then returns the current context label. | |
218 | * | |
3c5ee57c | 219 | * The label is allocated and maintained within the context #cxt. There is |
9e930041 | 220 | * nothing like reference counting for labels, you cannot deallocate the |
3c5ee57c KZ |
221 | * label. |
222 | * | |
6a632136 | 223 | * Returns: label struct or NULL in case of error. |
852ce62b | 224 | */ |
6a632136 | 225 | struct fdisk_label *fdisk_get_label(struct fdisk_context *cxt, const char *name) |
0c5d095e KZ |
226 | { |
227 | size_t i; | |
228 | ||
229 | assert(cxt); | |
230 | ||
852ce62b KZ |
231 | if (!name) |
232 | return cxt->label; | |
4a79a8f1 KZ |
233 | else if (strcasecmp(name, "mbr") == 0) |
234 | name = "dos"; | |
852ce62b | 235 | |
0c5d095e | 236 | for (i = 0; i < cxt->nlabels; i++) |
7ab242ec | 237 | if (cxt->labels[i] |
4a79a8f1 | 238 | && strcasecmp(cxt->labels[i]->name, name) == 0) |
0c5d095e KZ |
239 | return cxt->labels[i]; |
240 | ||
d71bd2f0 | 241 | DBG(CXT, ul_debugobj(cxt, "failed to found %s label driver", name)); |
0c5d095e KZ |
242 | return NULL; |
243 | } | |
244 | ||
6a632136 KZ |
245 | /** |
246 | * fdisk_next_label: | |
247 | * @cxt: context instance | |
248 | * @lb: returns pointer to the next label | |
249 | * | |
250 | * <informalexample> | |
251 | * <programlisting> | |
252 | * // print all supported labels | |
253 | * struct fdisk_context *cxt = fdisk_new_context(); | |
254 | * struct fdisk_label *lb = NULL; | |
255 | * | |
256 | * while (fdisk_next_label(cxt, &lb) == 0) | |
257 | * print("label name: %s\n", fdisk_label_get_name(lb)); | |
c7119037 | 258 | * fdisk_unref_context(cxt); |
6a632136 KZ |
259 | * </programlisting> |
260 | * </informalexample> | |
261 | * | |
262 | * Returns: <0 in case of error, 0 on success, 1 at the end. | |
263 | */ | |
264 | int fdisk_next_label(struct fdisk_context *cxt, struct fdisk_label **lb) | |
7a188aed KZ |
265 | { |
266 | size_t i; | |
267 | struct fdisk_label *res = NULL; | |
268 | ||
269 | if (!lb || !cxt) | |
270 | return -EINVAL; | |
271 | ||
272 | if (!*lb) | |
273 | res = cxt->labels[0]; | |
274 | else { | |
275 | for (i = 1; i < cxt->nlabels; i++) { | |
276 | if (*lb == cxt->labels[i - 1]) { | |
277 | res = cxt->labels[i]; | |
278 | break; | |
279 | } | |
280 | } | |
281 | } | |
282 | ||
283 | *lb = res; | |
284 | return res ? 0 : 1; | |
285 | } | |
286 | ||
6a632136 KZ |
287 | /** |
288 | * fdisk_get_nlabels: | |
289 | * @cxt: context | |
290 | * | |
291 | * Returns: number of supported label types | |
292 | */ | |
293 | size_t fdisk_get_nlabels(struct fdisk_context *cxt) | |
7aa0d529 KZ |
294 | { |
295 | return cxt ? cxt->nlabels : 0; | |
296 | } | |
297 | ||
6a632136 | 298 | int __fdisk_switch_label(struct fdisk_context *cxt, struct fdisk_label *lb) |
53b422ab | 299 | { |
7a188aed KZ |
300 | if (!lb || !cxt) |
301 | return -EINVAL; | |
302 | if (lb->disabled) { | |
d71bd2f0 | 303 | DBG(CXT, ul_debugobj(cxt, "*** attempt to switch to disabled label %s -- ignore!", lb->name)); |
53b422ab | 304 | return -EINVAL; |
7a188aed | 305 | } |
53b422ab | 306 | cxt->label = lb; |
d71bd2f0 | 307 | DBG(CXT, ul_debugobj(cxt, "--> switching context to %s!", lb->name)); |
9c76f85f KZ |
308 | |
309 | fdisk_apply_label_device_properties(cxt); | |
53b422ab KZ |
310 | return 0; |
311 | } | |
312 | ||
aa36c2cf KZ |
313 | /** |
314 | * fdisk_has_label: | |
315 | * @cxt: fdisk context | |
316 | * | |
317 | * Returns: return 1 if there is label on the device. | |
318 | */ | |
319 | int fdisk_has_label(struct fdisk_context *cxt) | |
320 | { | |
321 | return cxt && cxt->label; | |
322 | } | |
323 | ||
3457d90e KZ |
324 | /** |
325 | * fdisk_has_protected_bootbits: | |
326 | * @cxt: fdisk context | |
327 | * | |
328 | * Returns: return 1 if boot bits protection enabled. | |
329 | */ | |
330 | int fdisk_has_protected_bootbits(struct fdisk_context *cxt) | |
331 | { | |
332 | return cxt && cxt->protect_bootbits; | |
333 | } | |
334 | ||
335 | /** | |
336 | * fdisk_enable_bootbits_protection: | |
337 | * @cxt: fdisk context | |
338 | * @enable: 1 or 0 | |
339 | * | |
340 | * The library zeroizes all the first sector when create a new disk label by | |
341 | * default. This function allows to control this behavior. For now it's | |
342 | * supported for MBR and GPT. | |
343 | * | |
344 | * Returns: 0 on success, < 0 on error. | |
345 | */ | |
346 | int fdisk_enable_bootbits_protection(struct fdisk_context *cxt, int enable) | |
347 | { | |
348 | if (!cxt) | |
349 | return -EINVAL; | |
350 | cxt->protect_bootbits = enable ? 1 : 0; | |
351 | return 0; | |
352 | } | |
992f7cba KZ |
353 | /** |
354 | * fdisk_disable_dialogs | |
355 | * @cxt: fdisk context | |
9070c2e2 | 356 | * @disable: 1 or 0 |
992f7cba KZ |
357 | * |
358 | * The library uses dialog driven partitioning by default. | |
359 | * | |
360 | * Returns: 0 on success, < 0 on error. | |
361 | * | |
362 | * Since: 2.31 | |
363 | */ | |
364 | int fdisk_disable_dialogs(struct fdisk_context *cxt, int disable) | |
365 | { | |
366 | if (!cxt) | |
367 | return -EINVAL; | |
368 | ||
369 | cxt->no_disalogs = disable; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | /** | |
374 | * fdisk_has_dialogs | |
375 | * @cxt: fdisk context | |
376 | * | |
377 | * See fdisk_disable_dialogs() | |
378 | * | |
379 | * Returns: 1 if dialog driven partitioning enabled (default), or 0. | |
380 | * | |
381 | * Since: 2.31 | |
382 | */ | |
383 | int fdisk_has_dialogs(struct fdisk_context *cxt) | |
384 | { | |
385 | return cxt->no_disalogs == 0; | |
386 | } | |
3457d90e | 387 | |
6cbb7371 KZ |
388 | /** |
389 | * fdisk_enable_wipe | |
390 | * @cxt: fdisk context | |
391 | * @enable: 1 or 0 | |
392 | * | |
bd3457b8 KZ |
393 | * The library removes all PT/filesystem/RAID signatures before it writes |
394 | * partition table. The probing area where it looks for signatures is from | |
131e38a2 KZ |
395 | * the begin of the disk. The device is wiped by libblkid. |
396 | * | |
397 | * See also fdisk_wipe_partition(). | |
398 | * | |
6cbb7371 KZ |
399 | * Returns: 0 on success, < 0 on error. |
400 | */ | |
401 | int fdisk_enable_wipe(struct fdisk_context *cxt, int enable) | |
402 | { | |
403 | if (!cxt) | |
404 | return -EINVAL; | |
131e38a2 | 405 | |
bd3457b8 | 406 | fdisk_set_wipe_area(cxt, 0, cxt->total_sectors, enable); |
6cbb7371 KZ |
407 | return 0; |
408 | } | |
409 | ||
410 | /** | |
411 | * fdisk_has_wipe | |
412 | * @cxt: fdisk context | |
413 | * | |
414 | * Returns the current wipe setting. See fdisk_enable_wipe(). | |
415 | * | |
416 | * Returns: 0 on success, < 0 on error. | |
417 | */ | |
418 | int fdisk_has_wipe(struct fdisk_context *cxt) | |
419 | { | |
131e38a2 KZ |
420 | if (!cxt) |
421 | return 0; | |
422 | ||
bd3457b8 | 423 | return fdisk_has_wipe_area(cxt, 0, cxt->total_sectors); |
6cbb7371 KZ |
424 | } |
425 | ||
426 | ||
427 | /** | |
428 | * fdisk_get_collision | |
429 | * @cxt: fdisk context | |
430 | * | |
431 | * Returns: name of the filesystem or RAID detected on the device or NULL. | |
432 | */ | |
433 | const char *fdisk_get_collision(struct fdisk_context *cxt) | |
434 | { | |
435 | return cxt->collision; | |
436 | } | |
437 | ||
0cec78a3 KZ |
438 | /** |
439 | * fdisk_is_ptcollision: | |
440 | * @cxt: fdisk context | |
441 | * | |
fcf841f8 | 442 | * The collision detected by libblkid (usually another partition table). Note |
8d3e3e6b KZ |
443 | * that libfdisk does not support all partitions tables, so fdisk_has_label() |
444 | * may return false, but fdisk_is_ptcollision() may return true. | |
445 | * | |
446 | * Since: 2.30 | |
0cec78a3 KZ |
447 | * |
448 | * Returns: 0 or 1 | |
449 | */ | |
450 | int fdisk_is_ptcollision(struct fdisk_context *cxt) | |
451 | { | |
452 | return cxt->pt_collision; | |
453 | } | |
454 | ||
59c8e95b KZ |
455 | /** |
456 | * fdisk_get_npartitions: | |
457 | * @cxt: context | |
458 | * | |
7190b9b2 KZ |
459 | * The maximal number of the partitions depends on disklabel and does not |
460 | * have to describe the real limit of PT. | |
461 | * | |
462 | * For example the limit for MBR without extend partition is 4, with extended | |
463 | * partition it's unlimited (so the function returns the current number of all | |
464 | * partitions in this case). | |
465 | * | |
466 | * And for example for GPT it depends on space allocated on disk for array of | |
467 | * entry records (usually 128). | |
468 | * | |
469 | * It's fine to use fdisk_get_npartitions() in loops, but don't forget that | |
470 | * partition may be unused (see fdisk_is_partition_used()). | |
471 | * | |
472 | * <informalexample> | |
473 | * <programlisting> | |
474 | * struct fdisk_partition *pa = NULL; | |
475 | * size_t i, nmax = fdisk_get_npartitions(cxt); | |
476 | * | |
477 | * for (i = 0; i < nmax; i++) { | |
478 | * if (!fdisk_is_partition_used(cxt, i)) | |
479 | * continue; | |
480 | * ... do something ... | |
481 | * } | |
482 | * </programlisting> | |
483 | * </informalexample> | |
484 | * | |
485 | * Note that the recommended way to list partitions is to use | |
486 | * fdisk_get_partitions() and struct fdisk_table than ask disk driver for each | |
487 | * individual partitions. | |
488 | * | |
59c8e95b KZ |
489 | * Returns: maximal number of partitions for the current label. |
490 | */ | |
491 | size_t fdisk_get_npartitions(struct fdisk_context *cxt) | |
492 | { | |
493 | return cxt && cxt->label ? cxt->label->nparts_max : 0; | |
494 | } | |
495 | ||
aa36c2cf KZ |
496 | /** |
497 | * fdisk_is_labeltype: | |
498 | * @cxt: fdisk context | |
1753a234 | 499 | * @id: FDISK_DISKLABEL_* |
aa36c2cf | 500 | * |
5175ae87 | 501 | * See also fdisk_is_label() macro in libfdisk.h. |
4af064f3 | 502 | * |
705854f3 | 503 | * Returns: return 1 if the current label is @id |
aa36c2cf | 504 | */ |
1753a234 | 505 | int fdisk_is_labeltype(struct fdisk_context *cxt, enum fdisk_labeltype id) |
aa36c2cf | 506 | { |
1753a234 | 507 | assert(cxt); |
1753a234 | 508 | |
b9710f1f | 509 | return cxt->label && (unsigned)fdisk_label_get_type(cxt->label) == id; |
1753a234 KZ |
510 | } |
511 | ||
512 | /** | |
513 | * fdisk_get_parent: | |
514 | * @cxt: nested fdisk context | |
515 | * | |
516 | * Returns: pointer to parental context, or NULL | |
517 | */ | |
518 | struct fdisk_context *fdisk_get_parent(struct fdisk_context *cxt) | |
519 | { | |
520 | assert(cxt); | |
521 | return cxt->parent; | |
aa36c2cf | 522 | } |
53b422ab | 523 | |
4e0e8253 KZ |
524 | static void reset_context(struct fdisk_context *cxt) |
525 | { | |
7845ca8d | 526 | size_t i; |
4e0e8253 | 527 | |
d71bd2f0 | 528 | DBG(CXT, ul_debugobj(cxt, "*** resetting context")); |
0559e742 KZ |
529 | |
530 | /* reset drives' private data */ | |
531 | for (i = 0; i < cxt->nlabels; i++) | |
532 | fdisk_deinit_label(cxt->labels[i]); | |
4e0e8253 | 533 | |
11eee4c4 KZ |
534 | if (cxt->parent) { |
535 | /* the first sector may be independent on parent */ | |
536 | if (cxt->parent->firstsector != cxt->firstsector) | |
537 | free(cxt->firstsector); | |
538 | } else { | |
539 | /* we close device only in primary context */ | |
540 | if (cxt->dev_fd > -1) | |
541 | close(cxt->dev_fd); | |
d17c584a | 542 | free(cxt->firstsector); |
11eee4c4 | 543 | } |
4e0e8253 | 544 | |
13633a81 | 545 | free(cxt->dev_path); |
7845ca8d | 546 | cxt->dev_path = NULL; |
13633a81 | 547 | |
745801e4 KZ |
548 | free(cxt->dev_model); |
549 | cxt->dev_model = NULL; | |
550 | cxt->dev_model_probed = 0; | |
551 | ||
6cbb7371 KZ |
552 | free(cxt->collision); |
553 | cxt->collision = NULL; | |
554 | ||
7526c305 KZ |
555 | memset(&cxt->dev_st, 0, sizeof(cxt->dev_st)); |
556 | ||
13633a81 | 557 | cxt->dev_fd = -1; |
7845ca8d | 558 | cxt->firstsector = NULL; |
7c2cfb18 | 559 | cxt->firstsector_bufsz = 0; |
7845ca8d | 560 | |
1653f0b0 | 561 | fdisk_zeroize_device_properties(cxt); |
11eee4c4 | 562 | |
9138d6f9 | 563 | fdisk_unref_script(cxt->script); |
11eee4c4 | 564 | cxt->script = NULL; |
7845ca8d KZ |
565 | |
566 | cxt->label = NULL; | |
131e38a2 KZ |
567 | |
568 | fdisk_free_wipe_areas(cxt); | |
4e0e8253 KZ |
569 | } |
570 | ||
823f0fd1 | 571 | /** |
6a632136 | 572 | * fdisk_assign_device: |
11eee4c4 | 573 | * @cxt: context |
537187be | 574 | * @fname: path to the device to be handled |
25b529fe DB |
575 | * @readonly: how to open the device |
576 | * | |
11eee4c4 KZ |
577 | * Open the device, discovery topology, geometry, detect disklabel and switch |
578 | * the current label driver to reflect the probing result. | |
6a632136 | 579 | * |
11eee4c4 KZ |
580 | * Note that this function resets all generic setting in context. If the @cxt |
581 | * is nested context then the device is assigned to the parental context and | |
582 | * necessary properties are copied to the @cxt. The change is propagated in | |
583 | * child->parent direction only. It's impossible to use a different device for | |
584 | * primary and nested contexts. | |
347a7f77 | 585 | * |
58c41e15 | 586 | * Returns: 0 on success, < 0 on error. |
823f0fd1 | 587 | */ |
6a632136 KZ |
588 | int fdisk_assign_device(struct fdisk_context *cxt, |
589 | const char *fname, int readonly) | |
823f0fd1 | 590 | { |
2e2cfdae | 591 | int fd; |
823f0fd1 | 592 | |
d71bd2f0 | 593 | DBG(CXT, ul_debugobj(cxt, "assigning device %s", fname)); |
4e0e8253 KZ |
594 | assert(cxt); |
595 | ||
11eee4c4 KZ |
596 | /* redirect request to parent */ |
597 | if (cxt->parent) { | |
598 | int rc, org = fdisk_is_listonly(cxt->parent); | |
599 | ||
600 | /* assign_device() is sensitive to "listonly" mode, so let's | |
7526c305 | 601 | * follow the current context setting for the parent to avoid |
11eee4c4 KZ |
602 | * unwanted extra warnings. */ |
603 | fdisk_enable_listonly(cxt->parent, fdisk_is_listonly(cxt)); | |
604 | ||
605 | rc = fdisk_assign_device(cxt->parent, fname, readonly); | |
606 | fdisk_enable_listonly(cxt->parent, org); | |
607 | ||
13633a81 KZ |
608 | if (!rc) |
609 | rc = init_nested_from_parent(cxt, 0); | |
11eee4c4 KZ |
610 | if (!rc) |
611 | fdisk_probe_labels(cxt); | |
612 | return rc; | |
613 | } | |
614 | ||
4e0e8253 | 615 | reset_context(cxt); |
95f9f309 | 616 | |
e146ae4e KZ |
617 | fd = open(fname, (readonly ? O_RDONLY : O_RDWR ) | O_CLOEXEC); |
618 | if (fd < 0) | |
0a48e237 | 619 | goto fail; |
823f0fd1 | 620 | |
0a48e237 KZ |
621 | if (fstat(fd, &cxt->dev_st) != 0) |
622 | goto fail; | |
7526c305 | 623 | |
e146ae4e | 624 | cxt->readonly = readonly; |
823f0fd1 DB |
625 | cxt->dev_fd = fd; |
626 | cxt->dev_path = strdup(fname); | |
627 | if (!cxt->dev_path) | |
628 | goto fail; | |
618882d6 | 629 | |
aa42788d KZ |
630 | fdisk_discover_topology(cxt); |
631 | fdisk_discover_geometry(cxt); | |
823f0fd1 | 632 | |
502dd53c KZ |
633 | fdisk_apply_user_device_properties(cxt); |
634 | ||
3eb78aa7 KZ |
635 | if (fdisk_read_firstsector(cxt) < 0) |
636 | goto fail; | |
637 | ||
7ce10975 | 638 | fdisk_probe_labels(cxt); |
1653f0b0 | 639 | |
b2140d2f KZ |
640 | fdisk_apply_label_device_properties(cxt); |
641 | ||
6e876a98 KZ |
642 | /* warn about obsolete stuff on the device if we aren't in |
643 | * list-only mode and there is not PT yet */ | |
37204dc6 KZ |
644 | if (!fdisk_is_listonly(cxt) && !fdisk_has_label(cxt) |
645 | && fdisk_check_collisions(cxt) < 0) | |
6cbb7371 | 646 | goto fail; |
6e876a98 | 647 | |
d71bd2f0 KZ |
648 | DBG(CXT, ul_debugobj(cxt, "initialized for %s [%s]", |
649 | fname, readonly ? "READ-ONLY" : "READ-WRITE")); | |
4e0e8253 | 650 | return 0; |
823f0fd1 | 651 | fail: |
2e2cfdae SK |
652 | { |
653 | int rc = -errno; | |
654 | if (fd >= 0) | |
655 | close(fd); | |
656 | DBG(CXT, ul_debugobj(cxt, "failed to assign device [rc=%d]", rc)); | |
657 | return rc; | |
658 | } | |
823f0fd1 DB |
659 | } |
660 | ||
5175ae87 KZ |
661 | /** |
662 | * fdisk_deassign_device: | |
663 | * @cxt: context | |
664 | * @nosync: disable fsync() | |
665 | * | |
11eee4c4 KZ |
666 | * Close device and call fsync(). If the @cxt is nested context than the |
667 | * request is redirected to the parent. | |
7190b9b2 KZ |
668 | * |
669 | * Returns: 0 on success, < 0 on error. | |
5175ae87 | 670 | */ |
6a632136 | 671 | int fdisk_deassign_device(struct fdisk_context *cxt, int nosync) |
a57639e1 KZ |
672 | { |
673 | assert(cxt); | |
674 | assert(cxt->dev_fd >= 0); | |
675 | ||
11eee4c4 KZ |
676 | if (cxt->parent) { |
677 | int rc = fdisk_deassign_device(cxt->parent, nosync); | |
678 | ||
13633a81 KZ |
679 | if (!rc) |
680 | rc = init_nested_from_parent(cxt, 0); | |
11eee4c4 KZ |
681 | return rc; |
682 | } | |
683 | ||
2469ba36 KZ |
684 | DBG(CXT, ul_debugobj(cxt, "de-assigning device %s", cxt->dev_path)); |
685 | ||
2aeff761 | 686 | if (cxt->readonly) |
bc787727 | 687 | close(cxt->dev_fd); |
bc787727 KZ |
688 | else { |
689 | if (fsync(cxt->dev_fd) || close(cxt->dev_fd)) { | |
690 | fdisk_warn(cxt, _("%s: close device failed"), | |
691 | cxt->dev_path); | |
692 | return -errno; | |
693 | } | |
a57639e1 | 694 | |
2aeff761 KZ |
695 | if (!nosync) { |
696 | fdisk_info(cxt, _("Syncing disks.")); | |
697 | sync(); | |
698 | } | |
bc787727 | 699 | } |
152788aa KZ |
700 | |
701 | free(cxt->dev_path); | |
13633a81 | 702 | cxt->dev_path = NULL; |
152788aa | 703 | |
a57639e1 | 704 | cxt->dev_fd = -1; |
152788aa | 705 | |
a57639e1 KZ |
706 | return 0; |
707 | } | |
708 | ||
2469ba36 KZ |
709 | /** |
710 | * fdisk_reassign_device: | |
711 | * @cxt: context | |
712 | * | |
713 | * This function is "hard reset" of the context and it does not write anything | |
714 | * to the device. All in-memory changes associated with the context will be | |
715 | * lost. It's recommended to use this function after some fatal problem when the | |
716 | * context (and label specific driver) is in an undefined state. | |
717 | * | |
718 | * Returns: 0 on success, < 0 on error. | |
719 | */ | |
720 | int fdisk_reassign_device(struct fdisk_context *cxt) | |
721 | { | |
722 | char *devname; | |
723 | int rdonly, rc; | |
724 | ||
725 | assert(cxt); | |
726 | assert(cxt->dev_fd >= 0); | |
727 | ||
728 | DBG(CXT, ul_debugobj(cxt, "re-assigning device %s", cxt->dev_path)); | |
729 | ||
730 | devname = strdup(cxt->dev_path); | |
731 | if (!devname) | |
732 | return -ENOMEM; | |
733 | ||
734 | rdonly = cxt->readonly; | |
735 | ||
736 | fdisk_deassign_device(cxt, 1); | |
737 | rc = fdisk_assign_device(cxt, devname, rdonly); | |
738 | free(devname); | |
739 | ||
740 | return rc; | |
741 | } | |
742 | ||
6a1889b0 KZ |
743 | /** |
744 | * fdisk_reread_partition_table: | |
745 | * @cxt: context | |
746 | * | |
747 | * Force *kernel* to re-read partition table on block devices. | |
748 | * | |
749 | * Returns: 0 on success, < 0 in case of error. | |
750 | */ | |
751 | int fdisk_reread_partition_table(struct fdisk_context *cxt) | |
752 | { | |
2db3cc4c | 753 | int i = 0; |
6a1889b0 KZ |
754 | |
755 | assert(cxt); | |
756 | assert(cxt->dev_fd >= 0); | |
757 | ||
2db3cc4c KZ |
758 | if (!S_ISBLK(cxt->dev_st.st_mode)) |
759 | return 0; | |
760 | else { | |
6a1889b0 KZ |
761 | DBG(CXT, ul_debugobj(cxt, "calling re-read ioctl")); |
762 | sync(); | |
763 | #ifdef BLKRRPART | |
764 | fdisk_info(cxt, _("Calling ioctl() to re-read partition table.")); | |
765 | i = ioctl(cxt->dev_fd, BLKRRPART); | |
766 | #else | |
767 | errno = ENOSYS; | |
768 | i = 1; | |
769 | #endif | |
770 | } | |
771 | ||
772 | if (i) { | |
773 | fdisk_warn(cxt, _("Re-reading the partition table failed.")); | |
774 | fdisk_info(cxt, _( | |
775 | "The kernel still uses the old table. The " | |
776 | "new table will be used at the next reboot " | |
777 | "or after you run partprobe(8) or kpartx(8).")); | |
778 | return -errno; | |
779 | } | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
18751601 | 784 | #ifdef __linux__ |
1dd63a3b KZ |
785 | static inline int add_to_partitions_array( |
786 | struct fdisk_partition ***ary, | |
787 | struct fdisk_partition *pa, | |
788 | size_t *n, size_t nmax) | |
789 | { | |
790 | if (!*ary) { | |
791 | *ary = calloc(nmax, sizeof(struct fdisk_partition *)); | |
792 | if (!*ary) | |
793 | return -ENOMEM; | |
794 | } | |
795 | (*ary)[*n] = pa; | |
796 | (*n)++; | |
797 | return 0; | |
798 | } | |
18751601 | 799 | #endif |
1dd63a3b KZ |
800 | |
801 | /** | |
802 | * fdisk_reread_changes: | |
803 | * @cxt: context | |
804 | * @org: original layout (on disk) | |
805 | * | |
806 | * Like fdisk_reread_partition_table() but don't forces kernel re-read all | |
807 | * partition table. The BLKPG_* ioctls are used for individual partitions. The | |
808 | * advantage is that unmodified partitions maybe mounted. | |
809 | * | |
5ecd6185 | 810 | * The function behavies like fdisk_reread_partition_table() on systems where |
73afd3f8 | 811 | * are no available BLKPG_* ioctls. |
5ecd6185 | 812 | * |
1dd63a3b KZ |
813 | * Returns: <0 on error, or 0. |
814 | */ | |
5ecd6185 | 815 | #ifdef __linux__ |
1dd63a3b KZ |
816 | int fdisk_reread_changes(struct fdisk_context *cxt, struct fdisk_table *org) |
817 | { | |
818 | struct fdisk_table *tb = NULL; | |
819 | struct fdisk_iter itr; | |
820 | struct fdisk_partition *pa; | |
821 | struct fdisk_partition **rem = NULL, **add = NULL, **upd = NULL; | |
822 | int change, rc = 0, err = 0; | |
823 | size_t nparts, i, nadds = 0, nupds = 0, nrems = 0; | |
824 | ||
825 | DBG(CXT, ul_debugobj(cxt, "rereading changes")); | |
826 | ||
827 | fdisk_reset_iter(&itr, FDISK_ITER_FORWARD); | |
828 | ||
829 | /* the current layout */ | |
830 | fdisk_get_partitions(cxt, &tb); | |
831 | /* maximal number of partitions */ | |
832 | nparts = max(fdisk_table_get_nents(tb), fdisk_table_get_nents(org)); | |
833 | ||
834 | while (fdisk_diff_tables(org, tb, &itr, &pa, &change) == 0) { | |
835 | if (change == FDISK_DIFF_UNCHANGED) | |
836 | continue; | |
837 | switch (change) { | |
838 | case FDISK_DIFF_REMOVED: | |
839 | rc = add_to_partitions_array(&rem, pa, &nrems, nparts); | |
840 | break; | |
841 | case FDISK_DIFF_ADDED: | |
842 | rc = add_to_partitions_array(&add, pa, &nadds, nparts); | |
843 | break; | |
844 | case FDISK_DIFF_RESIZED: | |
845 | rc = add_to_partitions_array(&upd, pa, &nupds, nparts); | |
846 | break; | |
847 | case FDISK_DIFF_MOVED: | |
848 | rc = add_to_partitions_array(&rem, pa, &nrems, nparts); | |
7f3a9822 KZ |
849 | if (!rc) |
850 | rc = add_to_partitions_array(&add, pa, &nadds, nparts); | |
1dd63a3b KZ |
851 | break; |
852 | } | |
853 | if (rc != 0) | |
854 | goto done; | |
855 | } | |
856 | ||
857 | for (i = 0; i < nrems; i++) { | |
858 | pa = rem[i]; | |
859 | DBG(PART, ul_debugobj(pa, "#%zu calling BLKPG_DEL_PARTITION", pa->partno)); | |
860 | if (partx_del_partition(cxt->dev_fd, pa->partno + 1) != 0) { | |
c0eabc53 | 861 | fdisk_warn(cxt, _("Failed to remove partition %zu from system"), pa->partno + 1); |
1dd63a3b KZ |
862 | err++; |
863 | } | |
864 | } | |
865 | for (i = 0; i < nupds; i++) { | |
866 | pa = upd[i]; | |
867 | DBG(PART, ul_debugobj(pa, "#%zu calling BLKPG_RESIZE_PARTITION", pa->partno)); | |
868 | if (partx_resize_partition(cxt->dev_fd, pa->partno + 1, pa->start, pa->size) != 0) { | |
c0eabc53 | 869 | fdisk_warn(cxt, _("Failed to update system information about partition %zu"), pa->partno + 1); |
1dd63a3b KZ |
870 | err++; |
871 | } | |
872 | } | |
873 | for (i = 0; i < nadds; i++) { | |
874 | pa = add[i]; | |
875 | DBG(PART, ul_debugobj(pa, "#%zu calling BLKPG_ADD_PARTITION", pa->partno)); | |
876 | if (partx_add_partition(cxt->dev_fd, pa->partno + 1, pa->start, pa->size) != 0) { | |
c0eabc53 | 877 | fdisk_warn(cxt, _("Failed to add partition %zu to system"), pa->partno + 1); |
1dd63a3b KZ |
878 | err++; |
879 | } | |
880 | } | |
881 | if (err) | |
882 | fdisk_info(cxt, _( | |
883 | "The kernel still uses the old partitions. The new " | |
884 | "table will be used at the next reboot. ")); | |
885 | done: | |
886 | free(rem); | |
887 | free(add); | |
888 | free(upd); | |
889 | fdisk_unref_table(tb); | |
890 | return rc; | |
891 | } | |
5ecd6185 KZ |
892 | #else |
893 | int fdisk_reread_changes(struct fdisk_context *cxt, | |
894 | struct fdisk_table *org __attribute__((__unused__))) { | |
895 | return fdisk_reread_partition_table(cxt); | |
896 | } | |
897 | #endif | |
2db3cc4c | 898 | |
b9da1532 KZ |
899 | /** |
900 | * fdisk_device_is_used: | |
901 | * @cxt: context | |
902 | * | |
903 | * On systems where is no BLKRRPART ioctl the function returns zero and | |
904 | * sets errno to ENOSYS. | |
905 | * | |
906 | * Returns: 1 if the device assigned to the context is used by system, or 0. | |
907 | */ | |
908 | int fdisk_device_is_used(struct fdisk_context *cxt) | |
909 | { | |
910 | int rc = 0; | |
911 | ||
912 | assert(cxt); | |
913 | assert(cxt->dev_fd >= 0); | |
914 | ||
915 | errno = 0; | |
916 | ||
917 | #ifdef BLKRRPART | |
918 | /* it seems kernel always return EINVAL for BLKRRPART on loopdevices */ | |
919 | if (S_ISBLK(cxt->dev_st.st_mode) | |
920 | && major(cxt->dev_st.st_rdev) != LOOPDEV_MAJOR) { | |
921 | DBG(CXT, ul_debugobj(cxt, "calling re-read ioctl")); | |
922 | rc = ioctl(cxt->dev_fd, BLKRRPART) != 0; | |
923 | } | |
924 | #else | |
925 | errno = ENOSYS; | |
926 | #endif | |
927 | DBG(CXT, ul_debugobj(cxt, "device used: %s [errno=%d]", rc ? "TRUE" : "FALSE", errno)); | |
928 | return rc; | |
929 | } | |
930 | ||
5175ae87 KZ |
931 | /** |
932 | * fdisk_is_readonly: | |
933 | * @cxt: context | |
934 | * | |
935 | * Returns: 1 if device open readonly | |
936 | */ | |
6a632136 | 937 | int fdisk_is_readonly(struct fdisk_context *cxt) |
e146ae4e KZ |
938 | { |
939 | assert(cxt); | |
940 | return cxt->readonly; | |
941 | } | |
942 | ||
7526c305 KZ |
943 | /** |
944 | * fdisk_is_regfile: | |
945 | * @cxt: context | |
946 | * | |
8d3e3e6b KZ |
947 | * Since: 2.30 |
948 | * | |
7526c305 KZ |
949 | * Returns: 1 if open file descriptor is regular file rather than a block device. |
950 | */ | |
951 | int fdisk_is_regfile(struct fdisk_context *cxt) | |
952 | { | |
953 | assert(cxt); | |
954 | return S_ISREG(cxt->dev_st.st_mode); | |
955 | } | |
956 | ||
823f0fd1 | 957 | /** |
c7119037 | 958 | * fdisk_unref_context: |
823f0fd1 DB |
959 | * @cxt: fdisk context |
960 | * | |
961 | * Deallocates context struct. | |
962 | */ | |
c7119037 | 963 | void fdisk_unref_context(struct fdisk_context *cxt) |
823f0fd1 | 964 | { |
b9710f1f | 965 | unsigned i; |
0c5d095e | 966 | |
823f0fd1 DB |
967 | if (!cxt) |
968 | return; | |
969 | ||
c7119037 KZ |
970 | cxt->refcount--; |
971 | if (cxt->refcount <= 0) { | |
972 | DBG(CXT, ul_debugobj(cxt, "freeing context %p for %s", cxt, cxt->dev_path)); | |
11eee4c4 KZ |
973 | |
974 | reset_context(cxt); /* this is sensitive to parent<->child relationship! */ | |
c7119037 KZ |
975 | |
976 | /* deallocate label's private stuff */ | |
977 | for (i = 0; i < cxt->nlabels; i++) { | |
978 | if (!cxt->labels[i]) | |
979 | continue; | |
980 | if (cxt->labels[i]->op->free) | |
981 | cxt->labels[i]->op->free(cxt->labels[i]); | |
982 | else | |
983 | free(cxt->labels[i]); | |
984 | } | |
11eee4c4 KZ |
985 | |
986 | fdisk_unref_context(cxt->parent); | |
987 | cxt->parent = NULL; | |
988 | ||
c7119037 | 989 | free(cxt); |
0c5d095e | 990 | } |
823f0fd1 | 991 | } |
7845ca8d | 992 | |
cb7ce873 | 993 | |
a5c1b0fa | 994 | /** |
6a632136 KZ |
995 | * fdisk_enable_details: |
996 | * @cxt: context | |
9e930041 | 997 | * @enable: true/false |
a5c1b0fa | 998 | * |
6a632136 KZ |
999 | * Enables or disables "details" display mode. This function has effect to |
1000 | * fdisk_partition_to_string() function. | |
a5c1b0fa KZ |
1001 | * |
1002 | * Returns: 0 on success, < 0 on error. | |
1003 | */ | |
6a632136 | 1004 | int fdisk_enable_details(struct fdisk_context *cxt, int enable) |
a5c1b0fa KZ |
1005 | { |
1006 | assert(cxt); | |
1007 | cxt->display_details = enable ? 1 : 0; | |
1008 | return 0; | |
1009 | } | |
1010 | ||
6a632136 KZ |
1011 | /** |
1012 | * fdisk_is_details: | |
1013 | * @cxt: context | |
1014 | * | |
1015 | * Returns: 1 if details are enabled | |
1016 | */ | |
1017 | int fdisk_is_details(struct fdisk_context *cxt) | |
a5c1b0fa KZ |
1018 | { |
1019 | assert(cxt); | |
1020 | return cxt->display_details == 1; | |
1021 | } | |
cb7ce873 | 1022 | |
c10937dc | 1023 | /** |
6a632136 KZ |
1024 | * fdisk_enable_listonly: |
1025 | * @cxt: context | |
9e930041 | 1026 | * @enable: true/false |
c10937dc KZ |
1027 | * |
1028 | * Just list partition only, don't care about another details, mistakes, ... | |
1029 | * | |
1030 | * Returns: 0 on success, < 0 on error. | |
1031 | */ | |
6a632136 | 1032 | int fdisk_enable_listonly(struct fdisk_context *cxt, int enable) |
c10937dc KZ |
1033 | { |
1034 | assert(cxt); | |
1035 | cxt->listonly = enable ? 1 : 0; | |
1036 | return 0; | |
1037 | } | |
1038 | ||
6a632136 KZ |
1039 | /** |
1040 | * fdisk_is_listonly: | |
1041 | * @cxt: context | |
1042 | * | |
1043 | * Returns: 1 if list-only mode enabled | |
1044 | */ | |
1045 | int fdisk_is_listonly(struct fdisk_context *cxt) | |
c10937dc KZ |
1046 | { |
1047 | assert(cxt); | |
1048 | return cxt->listonly == 1; | |
1049 | } | |
1050 | ||
1051 | ||
6a632136 KZ |
1052 | /** |
1053 | * fdisk_set_unit: | |
1054 | * @cxt: context | |
cb7ce873 KZ |
1055 | * @str: "cylinder" or "sector". |
1056 | * | |
1057 | * This is pure shit, unfortunately for example Sun addresses begin of the | |
1058 | * partition by cylinders... | |
6a632136 | 1059 | * |
9e930041 | 1060 | * Returns: 0 on success, <0 on error. |
cb7ce873 | 1061 | */ |
6a632136 | 1062 | int fdisk_set_unit(struct fdisk_context *cxt, const char *str) |
cb7ce873 KZ |
1063 | { |
1064 | assert(cxt); | |
1065 | ||
1066 | cxt->display_in_cyl_units = 0; | |
1067 | ||
1068 | if (!str) | |
1069 | return 0; | |
1070 | ||
1071 | if (strcmp(str, "cylinder") == 0 || strcmp(str, "cylinders") == 0) | |
1072 | cxt->display_in_cyl_units = 1; | |
1073 | ||
1074 | else if (strcmp(str, "sector") == 0 || strcmp(str, "sectors") == 0) | |
1075 | cxt->display_in_cyl_units = 0; | |
1076 | ||
6a632136 | 1077 | DBG(CXT, ul_debugobj(cxt, "display unit: %s", fdisk_get_unit(cxt, 0))); |
cb7ce873 KZ |
1078 | return 0; |
1079 | } | |
1080 | ||
6a632136 KZ |
1081 | /** |
1082 | * fdisk_get_unit: | |
1083 | * @cxt: context | |
705854f3 | 1084 | * @n: FDISK_PLURAL or FDISK_SINGULAR |
6a632136 KZ |
1085 | * |
1086 | * Returns: unit name. | |
1087 | */ | |
1088 | const char *fdisk_get_unit(struct fdisk_context *cxt, int n) | |
cb7ce873 KZ |
1089 | { |
1090 | assert(cxt); | |
1091 | ||
6a632136 | 1092 | if (fdisk_use_cylinders(cxt)) |
cb7ce873 KZ |
1093 | return P_("cylinder", "cylinders", n); |
1094 | return P_("sector", "sectors", n); | |
1095 | } | |
1096 | ||
6a632136 KZ |
1097 | /** |
1098 | * fdisk_use_cylinders: | |
705854f3 | 1099 | * @cxt: context |
6a632136 | 1100 | * |
705854f3 | 1101 | * Returns: 1 if user wants to display in cylinders. |
6a632136 KZ |
1102 | */ |
1103 | int fdisk_use_cylinders(struct fdisk_context *cxt) | |
cb7ce873 KZ |
1104 | { |
1105 | assert(cxt); | |
1106 | return cxt->display_in_cyl_units == 1; | |
1107 | } | |
1108 | ||
6a632136 KZ |
1109 | /** |
1110 | * fdisk_get_units_per_sector: | |
1111 | * @cxt: context | |
1112 | * | |
1bcf491a | 1113 | * This is necessary only for brain dead situations when we use "cylinders"; |
6a632136 KZ |
1114 | * |
1115 | * Returns: number of "units" per sector, default is 1 if display unit is sector. | |
cb7ce873 | 1116 | */ |
6a632136 | 1117 | unsigned int fdisk_get_units_per_sector(struct fdisk_context *cxt) |
cb7ce873 KZ |
1118 | { |
1119 | assert(cxt); | |
1120 | ||
6a632136 | 1121 | if (fdisk_use_cylinders(cxt)) { |
cb7ce873 KZ |
1122 | assert(cxt->geom.heads); |
1123 | return cxt->geom.heads * cxt->geom.sectors; | |
1124 | } | |
1125 | return 1; | |
1126 | } | |
6a632136 KZ |
1127 | |
1128 | /** | |
1129 | * fdisk_get_optimal_iosize: | |
1130 | * @cxt: context | |
1131 | * | |
6b11aad2 KZ |
1132 | * The optimal I/O is optional and does not have to be provided by device, |
1133 | * anyway libfdisk never returns zero. If the optimal I/O size is not provided | |
1134 | * then libfdisk returns minimal I/O size or sector size. | |
1135 | * | |
7190b9b2 | 1136 | * Returns: optimal I/O size in bytes. |
6a632136 KZ |
1137 | */ |
1138 | unsigned long fdisk_get_optimal_iosize(struct fdisk_context *cxt) | |
1139 | { | |
1140 | assert(cxt); | |
6b11aad2 | 1141 | return cxt->optimal_io_size ? cxt->optimal_io_size : cxt->io_size; |
6a632136 KZ |
1142 | } |
1143 | ||
1144 | /** | |
1145 | * fdisk_get_minimal_iosize: | |
1146 | * @cxt: context | |
1147 | * | |
7190b9b2 | 1148 | * Returns: minimal I/O size in bytes |
6a632136 | 1149 | */ |
1753a234 | 1150 | unsigned long fdisk_get_minimal_iosize(struct fdisk_context *cxt) |
6a632136 KZ |
1151 | { |
1152 | assert(cxt); | |
1153 | return cxt->min_io_size; | |
1154 | } | |
1155 | ||
1156 | /** | |
1157 | * fdisk_get_physector_size: | |
1158 | * @cxt: context | |
1159 | * | |
7190b9b2 | 1160 | * Returns: physical sector size in bytes |
6a632136 KZ |
1161 | */ |
1162 | unsigned long fdisk_get_physector_size(struct fdisk_context *cxt) | |
1163 | { | |
1164 | assert(cxt); | |
1165 | return cxt->phy_sector_size; | |
1166 | } | |
1167 | ||
1168 | /** | |
1169 | * fdisk_get_sector_size: | |
1170 | * @cxt: context | |
1171 | * | |
7190b9b2 | 1172 | * Returns: logical sector size in bytes |
6a632136 KZ |
1173 | */ |
1174 | unsigned long fdisk_get_sector_size(struct fdisk_context *cxt) | |
1175 | { | |
1176 | assert(cxt); | |
1177 | return cxt->sector_size; | |
1178 | } | |
1179 | ||
1180 | /** | |
1181 | * fdisk_get_alignment_offset | |
1182 | * @cxt: context | |
1183 | * | |
7190b9b2 KZ |
1184 | * The alignment offset is offset between logical and physical sectors. For |
1185 | * backward compatibility the first logical sector on 4K disks does no have to | |
1186 | * start on the same place like physical sectors. | |
1187 | * | |
1188 | * Returns: alignment offset in bytes | |
6a632136 KZ |
1189 | */ |
1190 | unsigned long fdisk_get_alignment_offset(struct fdisk_context *cxt) | |
1191 | { | |
1192 | assert(cxt); | |
1193 | return cxt->alignment_offset; | |
1194 | } | |
1195 | ||
1196 | /** | |
1197 | * fdisk_get_grain_size: | |
1198 | * @cxt: context | |
1199 | * | |
7190b9b2 | 1200 | * Returns: grain in bytes used to align partitions (usually 1MiB) |
6a632136 KZ |
1201 | */ |
1202 | unsigned long fdisk_get_grain_size(struct fdisk_context *cxt) | |
1203 | { | |
1204 | assert(cxt); | |
1205 | return cxt->grain; | |
1206 | } | |
1207 | ||
1208 | /** | |
1209 | * fdisk_get_first_lba: | |
1210 | * @cxt: context | |
1211 | * | |
1212 | * Returns: first possible LBA on disk for data partitions. | |
1213 | */ | |
0073a4cf | 1214 | fdisk_sector_t fdisk_get_first_lba(struct fdisk_context *cxt) |
6a632136 KZ |
1215 | { |
1216 | assert(cxt); | |
1217 | return cxt->first_lba; | |
1218 | } | |
1219 | ||
6d37c2ce KZ |
1220 | /** |
1221 | * fdisk_set_first_lba: | |
1222 | * @cxt: fdisk context | |
7190b9b2 | 1223 | * @lba: first possible logical sector for data |
6d37c2ce KZ |
1224 | * |
1225 | * It's strongly recommended to use the default library setting. The first LBA | |
9e930041 | 1226 | * is always reset by fdisk_assign_device(), fdisk_override_geometry() |
6d37c2ce KZ |
1227 | * and fdisk_reset_alignment(). This is very low level function and library |
1228 | * does not check if your setting makes any sense. | |
1229 | * | |
7190b9b2 KZ |
1230 | * This function is necessary only when you want to work with very unusual |
1231 | * partition tables like GPT protective MBR or hybrid partition tables on | |
1232 | * bootable media where the first partition may start on very crazy offsets. | |
1233 | * | |
8a74df7f KZ |
1234 | * Note that this function changes only runtime information. It does not update |
1235 | * any range in on-disk partition table. For example GPT Header contains First | |
1236 | * and Last usable LBA fields. These fields are not updated by this function. | |
1237 | * Be careful. | |
1238 | * | |
6d37c2ce KZ |
1239 | * Returns: 0 on success, <0 on error. |
1240 | */ | |
0073a4cf | 1241 | fdisk_sector_t fdisk_set_first_lba(struct fdisk_context *cxt, fdisk_sector_t lba) |
6d37c2ce KZ |
1242 | { |
1243 | assert(cxt); | |
1244 | DBG(CXT, ul_debugobj(cxt, "setting first LBA from %ju to %ju", | |
1245 | (uintmax_t) cxt->first_lba, (uintmax_t) lba)); | |
1246 | cxt->first_lba = lba; | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | /** | |
1251 | * fdisk_get_last_lba: | |
1252 | * @cxt: fdisk context | |
1253 | * | |
1254 | * Note that the device has to be already assigned. | |
1255 | * | |
1256 | * Returns: last possible LBA on device | |
1257 | */ | |
0073a4cf | 1258 | fdisk_sector_t fdisk_get_last_lba(struct fdisk_context *cxt) |
6d37c2ce KZ |
1259 | { |
1260 | return cxt->last_lba; | |
1261 | } | |
1262 | ||
1263 | /** | |
1264 | * fdisk_set_last_lba: | |
1265 | * @cxt: fdisk context | |
7190b9b2 | 1266 | * @lba: last possible logical sector |
6d37c2ce KZ |
1267 | * |
1268 | * It's strongly recommended to use the default library setting. The last LBA | |
9e930041 | 1269 | * is always reset by fdisk_assign_device(), fdisk_override_geometry() and |
6d37c2ce KZ |
1270 | * fdisk_reset_alignment(). |
1271 | * | |
7190b9b2 | 1272 | * The default is number of sectors on the device, but maybe modified by the |
dee59a1e | 1273 | * current disklabel driver (for example GPT uses the end of disk for backup |
7190b9b2 KZ |
1274 | * header, so last_lba is smaller than total number of sectors). |
1275 | * | |
6d37c2ce KZ |
1276 | * Returns: 0 on success, <0 on error. |
1277 | */ | |
0073a4cf | 1278 | fdisk_sector_t fdisk_set_last_lba(struct fdisk_context *cxt, fdisk_sector_t lba) |
6d37c2ce KZ |
1279 | { |
1280 | assert(cxt); | |
1281 | ||
083c35b9 | 1282 | if (lba > cxt->total_sectors - 1 || lba < 1) |
6d37c2ce KZ |
1283 | return -ERANGE; |
1284 | cxt->last_lba = lba; | |
1285 | return 0; | |
1286 | } | |
1287 | ||
354f8cc8 KZ |
1288 | /** |
1289 | * fdisk_set_size_unit: | |
1290 | * @cxt: fdisk context | |
1291 | * @unit: FDISK_SIZEUNIT_* | |
1292 | * | |
1293 | * Sets unit for SIZE output field (see fdisk_partition_to_string()). | |
1294 | * | |
1295 | * Returns: 0 on success, <0 on error. | |
1296 | */ | |
1297 | int fdisk_set_size_unit(struct fdisk_context *cxt, int unit) | |
1298 | { | |
1299 | assert(cxt); | |
1300 | cxt->sizeunit = unit; | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | /** | |
1305 | * fdisk_get_size_unit: | |
1306 | * @cxt: fdisk context | |
1307 | * | |
1308 | * Gets unit for SIZE output field (see fdisk_partition_to_string()). | |
1309 | * | |
1310 | * Returns: unit | |
1311 | */ | |
f3aca7ab | 1312 | int fdisk_get_size_unit(struct fdisk_context *cxt) |
354f8cc8 KZ |
1313 | { |
1314 | assert(cxt); | |
1315 | return cxt->sizeunit; | |
1316 | } | |
6d37c2ce | 1317 | |
6a632136 KZ |
1318 | /** |
1319 | * fdisk_get_nsectors: | |
1320 | * @cxt: context | |
1321 | * | |
7190b9b2 | 1322 | * Returns: size of the device in logical sectors. |
6a632136 | 1323 | */ |
0073a4cf | 1324 | fdisk_sector_t fdisk_get_nsectors(struct fdisk_context *cxt) |
6a632136 KZ |
1325 | { |
1326 | assert(cxt); | |
1327 | return cxt->total_sectors; | |
1328 | } | |
1329 | ||
1330 | /** | |
1331 | * fdisk_get_devname: | |
1332 | * @cxt: context | |
1333 | * | |
1334 | * Returns: device name. | |
1335 | */ | |
1336 | const char *fdisk_get_devname(struct fdisk_context *cxt) | |
1337 | { | |
1338 | assert(cxt); | |
1339 | return cxt->dev_path; | |
1340 | } | |
aa36c2cf | 1341 | |
745801e4 KZ |
1342 | /** |
1343 | * fdisk_get_devno: | |
1344 | * @cxt: context | |
1345 | * | |
1346 | * Returns: device number or zero for non-block devices | |
1347 | */ | |
1348 | dev_t fdisk_get_devno(struct fdisk_context *cxt) | |
1349 | { | |
1350 | assert(cxt); | |
1351 | return S_ISBLK(cxt->dev_st.st_mode) ? cxt->dev_st.st_rdev : 0; | |
1352 | } | |
1353 | ||
1354 | /** | |
1355 | * fdisk_get_devmodel: | |
1356 | * @cxt: context | |
1357 | * | |
1358 | * Returns: device model string or NULL. | |
1359 | */ | |
e5e3a87c | 1360 | #ifdef __linux__ |
745801e4 KZ |
1361 | const char *fdisk_get_devmodel(struct fdisk_context *cxt) |
1362 | { | |
745801e4 KZ |
1363 | assert(cxt); |
1364 | ||
1365 | if (cxt->dev_model_probed) | |
1366 | return cxt->dev_model; | |
1367 | ||
1368 | if (fdisk_get_devno(cxt)) { | |
1369 | struct path_cxt *pc = ul_new_sysfs_path(fdisk_get_devno(cxt), NULL, NULL); | |
1370 | ||
1371 | if (pc) { | |
1372 | ul_path_read_string(pc, &cxt->dev_model, "device/model"); | |
1373 | ul_unref_path(pc); | |
1374 | } | |
1375 | } | |
1376 | cxt->dev_model_probed = 1; | |
1377 | return cxt->dev_model; | |
e5e3a87c | 1378 | } |
745801e4 | 1379 | #else |
e5e3a87c RM |
1380 | const char *fdisk_get_devmodel(struct fdisk_context *cxt __attribute__((__unused__))) |
1381 | { | |
745801e4 | 1382 | return NULL; |
745801e4 | 1383 | } |
e5e3a87c | 1384 | #endif |
745801e4 | 1385 | |
1753a234 KZ |
1386 | /** |
1387 | * fdisk_get_devfd: | |
1388 | * @cxt: context | |
1389 | * | |
9e930041 | 1390 | * Returns: device file descriptor. |
1753a234 KZ |
1391 | */ |
1392 | int fdisk_get_devfd(struct fdisk_context *cxt) | |
1393 | { | |
1394 | assert(cxt); | |
1395 | return cxt->dev_fd; | |
1396 | } | |
1397 | ||
1398 | /** | |
1399 | * fdisk_get_geom_heads: | |
1400 | * @cxt: context | |
1401 | * | |
1402 | * Returns: number of geometry heads. | |
1403 | */ | |
1404 | unsigned int fdisk_get_geom_heads(struct fdisk_context *cxt) | |
1405 | { | |
1406 | assert(cxt); | |
1407 | return cxt->geom.heads; | |
1408 | } | |
1409 | /** | |
1410 | * fdisk_get_geom_sectors: | |
1411 | * @cxt: context | |
1412 | * | |
1413 | * Returns: number of geometry sectors. | |
1414 | */ | |
0073a4cf | 1415 | fdisk_sector_t fdisk_get_geom_sectors(struct fdisk_context *cxt) |
1753a234 KZ |
1416 | { |
1417 | assert(cxt); | |
1418 | return cxt->geom.sectors; | |
1419 | ||
1420 | } | |
1421 | ||
1422 | /** | |
1423 | * fdisk_get_geom_cylinders: | |
1424 | * @cxt: context | |
1425 | * | |
1426 | * Returns: number of geometry cylinders | |
1427 | */ | |
0073a4cf | 1428 | fdisk_sector_t fdisk_get_geom_cylinders(struct fdisk_context *cxt) |
1753a234 KZ |
1429 | { |
1430 | assert(cxt); | |
1431 | return cxt->geom.cylinders; | |
1432 | } | |
aa36c2cf | 1433 | |
72d2965c KZ |
1434 | int fdisk_missing_geometry(struct fdisk_context *cxt) |
1435 | { | |
1436 | int rc; | |
1437 | ||
72d2965c KZ |
1438 | if (!cxt || !cxt->label) |
1439 | return 0; | |
1440 | ||
1441 | rc = (fdisk_label_require_geometry(cxt->label) && | |
1442 | (!cxt->geom.heads || !cxt->geom.sectors | |
1443 | || !cxt->geom.cylinders)); | |
1444 | ||
1445 | if (rc && !fdisk_is_listonly(cxt)) | |
1446 | fdisk_warnx(cxt, _("Incomplete geometry setting.")); | |
1447 | ||
1448 | return rc; | |
1449 | } | |
aa36c2cf | 1450 |