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