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1 | /* | |
2 | * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. | |
3 | * Copyright (C) 2004-2012 Red Hat, Inc. All rights reserved. | |
4 | * | |
5 | * This file is part of LVM2. | |
6 | * | |
7 | * This copyrighted material is made available to anyone wishing to use, | |
8 | * modify, copy, or redistribute it subject to the terms and conditions | |
9 | * of the GNU Lesser General Public License v.2.1. | |
10 | * | |
11 | * You should have received a copy of the GNU Lesser General Public License | |
12 | * along with this program; if not, write to the Free Software Foundation, | |
13 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
14 | */ | |
15 | ||
16 | #include "tools.h" | |
17 | ||
18 | #define SIZE_BUF 128 | |
19 | ||
20 | struct lvresize_params { | |
21 | const char *vg_name; | |
22 | const char *lv_name; | |
23 | ||
24 | uint32_t stripes; | |
25 | uint32_t stripe_size; | |
26 | uint32_t mirrors; | |
27 | ||
28 | const struct segment_type *segtype; | |
29 | ||
30 | /* size */ | |
31 | uint32_t extents; | |
32 | uint64_t size; | |
33 | sign_t sign; | |
34 | percent_type_t percent; | |
35 | ||
36 | enum { | |
37 | LV_ANY = 0, | |
38 | LV_REDUCE = 1, | |
39 | LV_EXTEND = 2 | |
40 | } resize; | |
41 | ||
42 | int resizefs; | |
43 | int nofsck; | |
44 | ||
45 | int argc; | |
46 | char **argv; | |
47 | }; | |
48 | ||
49 | static int _validate_stripesize(struct cmd_context *cmd, | |
50 | const struct volume_group *vg, | |
51 | struct lvresize_params *lp) | |
52 | { | |
53 | if (arg_sign_value(cmd, stripesize_ARG, SIGN_NONE) == SIGN_MINUS) { | |
54 | log_error("Stripesize may not be negative."); | |
55 | return 0; | |
56 | } | |
57 | ||
58 | if (arg_uint64_value(cmd, stripesize_ARG, 0) > STRIPE_SIZE_LIMIT * 2) { | |
59 | log_error("Stripe size cannot be larger than %s", | |
60 | display_size(cmd, (uint64_t) STRIPE_SIZE_LIMIT)); | |
61 | return 0; | |
62 | } | |
63 | ||
64 | if (!(vg->fid->fmt->features & FMT_SEGMENTS)) | |
65 | log_warn("Varied stripesize not supported. Ignoring."); | |
66 | else if (arg_uint_value(cmd, stripesize_ARG, 0) > (uint64_t) vg->extent_size * 2) { | |
67 | log_error("Reducing stripe size %s to maximum, " | |
68 | "physical extent size %s", | |
69 | display_size(cmd, | |
70 | (uint64_t) arg_uint_value(cmd, stripesize_ARG, 0)), | |
71 | display_size(cmd, (uint64_t) vg->extent_size)); | |
72 | lp->stripe_size = vg->extent_size; | |
73 | } else | |
74 | lp->stripe_size = arg_uint_value(cmd, stripesize_ARG, 0); | |
75 | ||
76 | if (lp->stripe_size & (lp->stripe_size - 1)) { | |
77 | log_error("Stripe size must be power of 2"); | |
78 | return 0; | |
79 | } | |
80 | ||
81 | return 1; | |
82 | } | |
83 | ||
84 | static int _request_confirmation(struct cmd_context *cmd, | |
85 | const struct volume_group *vg, | |
86 | const struct logical_volume *lv, | |
87 | const struct lvresize_params *lp) | |
88 | { | |
89 | struct lvinfo info; | |
90 | ||
91 | memset(&info, 0, sizeof(info)); | |
92 | ||
93 | if (!lv_info(cmd, lv, 0, &info, 1, 0) && driver_version(NULL, 0)) { | |
94 | log_error("lv_info failed: aborting"); | |
95 | return 0; | |
96 | } | |
97 | ||
98 | if (lp->resizefs) { | |
99 | if (!info.exists) { | |
100 | log_error("Logical volume %s must be activated " | |
101 | "before resizing filesystem", lp->lv_name); | |
102 | return 0; | |
103 | } | |
104 | return 1; | |
105 | } | |
106 | ||
107 | if (!info.exists) | |
108 | return 1; | |
109 | ||
110 | log_warn("WARNING: Reducing active%s logical volume to %s", | |
111 | info.open_count ? " and open" : "", | |
112 | display_size(cmd, (uint64_t) lp->extents * vg->extent_size)); | |
113 | ||
114 | log_warn("THIS MAY DESTROY YOUR DATA (filesystem etc.)"); | |
115 | ||
116 | if (!arg_count(cmd, force_ARG)) { | |
117 | if (yes_no_prompt("Do you really want to reduce %s? [y/n]: ", | |
118 | lp->lv_name) == 'n') { | |
119 | log_error("Logical volume %s NOT reduced", lp->lv_name); | |
120 | return 0; | |
121 | } | |
122 | if (sigint_caught()) | |
123 | return 0; | |
124 | } | |
125 | ||
126 | return 1; | |
127 | } | |
128 | ||
129 | enum fsadm_cmd_e { FSADM_CMD_CHECK, FSADM_CMD_RESIZE }; | |
130 | #define FSADM_CMD "fsadm" | |
131 | #define FSADM_CMD_MAX_ARGS 6 | |
132 | #define FSADM_CHECK_FAILS_FOR_MOUNTED 3 /* shell exist status code */ | |
133 | ||
134 | /* | |
135 | * FSADM_CMD --dry-run --verbose --force check lv_path | |
136 | * FSADM_CMD --dry-run --verbose --force resize lv_path size | |
137 | */ | |
138 | static int _fsadm_cmd(struct cmd_context *cmd, | |
139 | const struct volume_group *vg, | |
140 | const struct lvresize_params *lp, | |
141 | enum fsadm_cmd_e fcmd, | |
142 | int *status) | |
143 | { | |
144 | char lv_path[PATH_MAX]; | |
145 | char size_buf[SIZE_BUF]; | |
146 | const char *argv[FSADM_CMD_MAX_ARGS + 2]; | |
147 | unsigned i = 0; | |
148 | ||
149 | argv[i++] = FSADM_CMD; | |
150 | ||
151 | if (test_mode()) | |
152 | argv[i++] = "--dry-run"; | |
153 | ||
154 | if (verbose_level() >= _LOG_NOTICE) | |
155 | argv[i++] = "--verbose"; | |
156 | ||
157 | if (arg_count(cmd, force_ARG)) | |
158 | argv[i++] = "--force"; | |
159 | ||
160 | argv[i++] = (fcmd == FSADM_CMD_RESIZE) ? "resize" : "check"; | |
161 | ||
162 | if (status) | |
163 | *status = -1; | |
164 | ||
165 | if (dm_snprintf(lv_path, PATH_MAX, "%s%s/%s", cmd->dev_dir, lp->vg_name, | |
166 | lp->lv_name) < 0) { | |
167 | log_error("Couldn't create LV path for %s", lp->lv_name); | |
168 | return 0; | |
169 | } | |
170 | ||
171 | argv[i++] = lv_path; | |
172 | ||
173 | if (fcmd == FSADM_CMD_RESIZE) { | |
174 | if (dm_snprintf(size_buf, SIZE_BUF, "%" PRIu64 "K", | |
175 | (uint64_t) lp->extents * vg->extent_size / 2) < 0) { | |
176 | log_error("Couldn't generate new LV size string"); | |
177 | return 0; | |
178 | } | |
179 | ||
180 | argv[i++] = size_buf; | |
181 | } | |
182 | ||
183 | argv[i] = NULL; | |
184 | ||
185 | return exec_cmd(cmd, argv, status, 1); | |
186 | } | |
187 | ||
188 | static int _lvresize_params(struct cmd_context *cmd, int argc, char **argv, | |
189 | struct lvresize_params *lp) | |
190 | { | |
191 | const char *cmd_name; | |
192 | char *st; | |
193 | unsigned dev_dir_found = 0; | |
194 | int use_policy = arg_count(cmd, use_policies_ARG); | |
195 | ||
196 | lp->sign = SIGN_NONE; | |
197 | lp->resize = LV_ANY; | |
198 | ||
199 | cmd_name = command_name(cmd); | |
200 | if (!strcmp(cmd_name, "lvreduce")) | |
201 | lp->resize = LV_REDUCE; | |
202 | if (!strcmp(cmd_name, "lvextend")) | |
203 | lp->resize = LV_EXTEND; | |
204 | ||
205 | if (use_policy) { | |
206 | /* do nothing; _lvresize will handle --use-policies itself */ | |
207 | lp->extents = 0; | |
208 | lp->sign = SIGN_PLUS; | |
209 | lp->percent = PERCENT_LV; | |
210 | } else { | |
211 | /* | |
212 | * Allow omission of extents and size if the user has given us | |
213 | * one or more PVs. Most likely, the intent was "resize this | |
214 | * LV the best you can with these PVs" | |
215 | */ | |
216 | if ((arg_count(cmd, extents_ARG) + arg_count(cmd, size_ARG) == 0) && | |
217 | (argc >= 2)) { | |
218 | lp->extents = 100; | |
219 | lp->percent = PERCENT_PVS; | |
220 | lp->sign = SIGN_PLUS; | |
221 | } else if ((arg_count(cmd, extents_ARG) + | |
222 | arg_count(cmd, size_ARG) != 1)) { | |
223 | log_error("Please specify either size or extents but not " | |
224 | "both."); | |
225 | return 0; | |
226 | } | |
227 | ||
228 | if (arg_count(cmd, extents_ARG)) { | |
229 | lp->extents = arg_uint_value(cmd, extents_ARG, 0); | |
230 | lp->sign = arg_sign_value(cmd, extents_ARG, SIGN_NONE); | |
231 | lp->percent = arg_percent_value(cmd, extents_ARG, PERCENT_NONE); | |
232 | } | |
233 | ||
234 | /* Size returned in kilobyte units; held in sectors */ | |
235 | if (arg_count(cmd, size_ARG)) { | |
236 | lp->size = arg_uint64_value(cmd, size_ARG, 0); | |
237 | lp->sign = arg_sign_value(cmd, size_ARG, SIGN_NONE); | |
238 | lp->percent = PERCENT_NONE; | |
239 | } | |
240 | } | |
241 | ||
242 | if (lp->resize == LV_EXTEND && lp->sign == SIGN_MINUS) { | |
243 | log_error("Negative argument not permitted - use lvreduce"); | |
244 | return 0; | |
245 | } | |
246 | ||
247 | if (lp->resize == LV_REDUCE && lp->sign == SIGN_PLUS) { | |
248 | log_error("Positive sign not permitted - use lvextend"); | |
249 | return 0; | |
250 | } | |
251 | ||
252 | lp->resizefs = arg_is_set(cmd, resizefs_ARG); | |
253 | lp->nofsck = arg_is_set(cmd, nofsck_ARG); | |
254 | ||
255 | if (!argc) { | |
256 | log_error("Please provide the logical volume name"); | |
257 | return 0; | |
258 | } | |
259 | ||
260 | lp->lv_name = argv[0]; | |
261 | argv++; | |
262 | argc--; | |
263 | ||
264 | if (!(lp->lv_name = skip_dev_dir(cmd, lp->lv_name, &dev_dir_found)) || | |
265 | !(lp->vg_name = extract_vgname(cmd, lp->lv_name))) { | |
266 | log_error("Please provide a volume group name"); | |
267 | return 0; | |
268 | } | |
269 | ||
270 | if (!validate_name(lp->vg_name)) { | |
271 | log_error("Volume group name %s has invalid characters", | |
272 | lp->vg_name); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | if ((st = strrchr(lp->lv_name, '/'))) | |
277 | lp->lv_name = st + 1; | |
278 | ||
279 | lp->argc = argc; | |
280 | lp->argv = argv; | |
281 | ||
282 | return 1; | |
283 | } | |
284 | ||
285 | static int _adjust_policy_params(struct cmd_context *cmd, | |
286 | struct logical_volume *lv, struct lvresize_params *lp) | |
287 | { | |
288 | percent_t percent; | |
289 | int policy_threshold, policy_amount; | |
290 | ||
291 | if (lv_is_thin_pool(lv)) { | |
292 | policy_threshold = | |
293 | find_config_tree_int(cmd, "activation/thin_pool_autoextend_threshold", | |
294 | DEFAULT_THIN_POOL_AUTOEXTEND_THRESHOLD) * PERCENT_1; | |
295 | policy_amount = | |
296 | find_config_tree_int(cmd, "activation/thin_pool_autoextend_percent", | |
297 | DEFAULT_THIN_POOL_AUTOEXTEND_PERCENT); | |
298 | } else { | |
299 | policy_threshold = | |
300 | find_config_tree_int(cmd, "activation/snapshot_autoextend_threshold", | |
301 | DEFAULT_SNAPSHOT_AUTOEXTEND_THRESHOLD) * PERCENT_1; | |
302 | policy_amount = | |
303 | find_config_tree_int(cmd, "activation/snapshot_autoextend_percent", | |
304 | DEFAULT_SNAPSHOT_AUTOEXTEND_PERCENT); | |
305 | } | |
306 | ||
307 | if (policy_threshold >= PERCENT_100) | |
308 | return 1; /* nothing to do */ | |
309 | ||
310 | if (lv_is_thin_pool(lv)) { | |
311 | if (!lv_thin_pool_percent(lv, 1, &percent)) | |
312 | return_0; | |
313 | if (percent > policy_threshold) { | |
314 | /* FIXME: metadata resize support missing */ | |
315 | log_error("Resize for %s/%s is not yet supported.", | |
316 | lp->vg_name, lp->lv_name); | |
317 | return ECMD_FAILED; | |
318 | } | |
319 | ||
320 | if (!lv_thin_pool_percent(lv, 0, &percent)) | |
321 | return_0; | |
322 | if (!(PERCENT_0 < percent && percent <= PERCENT_100) || | |
323 | percent <= policy_threshold) | |
324 | return 1; /* nothing to do */ | |
325 | } else { | |
326 | if (!lv_snapshot_percent(lv, &percent)) | |
327 | return_0; | |
328 | if (!(PERCENT_0 < percent && percent < PERCENT_100) || percent <= policy_threshold) | |
329 | return 1; /* nothing to do */ | |
330 | } | |
331 | ||
332 | lp->extents = policy_amount; | |
333 | ||
334 | return 1; | |
335 | } | |
336 | ||
337 | static uint32_t lvseg_get_stripes(struct lv_segment *seg, uint32_t *stripesize) | |
338 | { | |
339 | uint32_t s; | |
340 | struct lv_segment *seg_mirr; | |
341 | ||
342 | /* If segment mirrored, check if images are striped */ | |
343 | if (seg_is_mirrored(seg)) | |
344 | for (s = 0; s < seg->area_count; s++) { | |
345 | if (seg_type(seg, s) != AREA_LV) | |
346 | continue; | |
347 | seg_mirr = first_seg(seg_lv(seg, s)); | |
348 | ||
349 | if (seg_is_striped(seg_mirr)) { | |
350 | seg = seg_mirr; | |
351 | break; | |
352 | } | |
353 | } | |
354 | ||
355 | ||
356 | if (seg_is_striped(seg)) { | |
357 | *stripesize = seg->stripe_size; | |
358 | return seg->area_count; | |
359 | } | |
360 | ||
361 | *stripesize = 0; | |
362 | return 0; | |
363 | } | |
364 | ||
365 | static int _lvresize(struct cmd_context *cmd, struct volume_group *vg, | |
366 | struct lvresize_params *lp) | |
367 | { | |
368 | struct logical_volume *lv; | |
369 | struct lvinfo info; | |
370 | uint32_t stripesize_extents; | |
371 | uint32_t seg_stripes = 0, seg_stripesize = 0, seg_size; | |
372 | uint32_t seg_mirrors = 0; | |
373 | uint32_t extents_used; | |
374 | uint32_t size_rest; | |
375 | uint32_t pv_extent_count; | |
376 | alloc_policy_t alloc; | |
377 | struct logical_volume *lock_lv; | |
378 | struct lv_list *lvl; | |
379 | struct lv_segment *seg, *uninitialized_var(mirr_seg); | |
380 | uint32_t seg_extents; | |
381 | uint32_t sz, str; | |
382 | int status; | |
383 | struct dm_list *pvh = NULL; | |
384 | int use_policy = arg_count(cmd, use_policies_ARG); | |
385 | ||
386 | /* does LV exist? */ | |
387 | if (!(lvl = find_lv_in_vg(vg, lp->lv_name))) { | |
388 | log_error("Logical volume %s not found in volume group %s", | |
389 | lp->lv_name, lp->vg_name); | |
390 | return ECMD_FAILED; | |
391 | } | |
392 | ||
393 | if (lvl->lv->status & (RAID_IMAGE | RAID_META)) { | |
394 | log_error("Cannot resize a RAID %s directly", | |
395 | (lvl->lv->status & RAID_IMAGE) ? "image" : | |
396 | "metadata area"); | |
397 | return ECMD_FAILED; | |
398 | } | |
399 | ||
400 | if (lv_is_raid_with_tracking(lvl->lv)) { | |
401 | log_error("Cannot resize %s while it is tracking a split image", | |
402 | lvl->lv->name); | |
403 | return ECMD_FAILED; | |
404 | } | |
405 | ||
406 | if (arg_count(cmd, stripes_ARG)) { | |
407 | if (vg->fid->fmt->features & FMT_SEGMENTS) | |
408 | lp->stripes = arg_uint_value(cmd, stripes_ARG, 1); | |
409 | else | |
410 | log_warn("Varied striping not supported. Ignoring."); | |
411 | } | |
412 | ||
413 | if (arg_count(cmd, mirrors_ARG)) { | |
414 | if (vg->fid->fmt->features & FMT_SEGMENTS) | |
415 | lp->mirrors = arg_uint_value(cmd, mirrors_ARG, 1) + 1; | |
416 | else | |
417 | log_warn("Mirrors not supported. Ignoring."); | |
418 | if (arg_sign_value(cmd, mirrors_ARG, SIGN_NONE) == SIGN_MINUS) { | |
419 | log_error("Mirrors argument may not be negative"); | |
420 | return EINVALID_CMD_LINE; | |
421 | } | |
422 | } | |
423 | ||
424 | if (arg_count(cmd, stripesize_ARG) && | |
425 | !_validate_stripesize(cmd, vg, lp)) | |
426 | return EINVALID_CMD_LINE; | |
427 | ||
428 | lv = lvl->lv; | |
429 | ||
430 | if (use_policy) { | |
431 | if (!lv_is_cow(lv) && | |
432 | !lv_is_thin_pool(lv)) { | |
433 | log_error("Policy-based resize is supported only for snapshot and thin pool volumes."); | |
434 | return ECMD_FAILED; | |
435 | } | |
436 | if (!_adjust_policy_params(cmd, lv, lp)) | |
437 | return ECMD_FAILED; | |
438 | } | |
439 | ||
440 | if (!lv_is_visible(lv)) { | |
441 | log_error("Can't resize internal logical volume %s", lv->name); | |
442 | return ECMD_FAILED; | |
443 | } | |
444 | ||
445 | if (lv->status & LOCKED) { | |
446 | log_error("Can't resize locked LV %s", lv->name); | |
447 | return ECMD_FAILED; | |
448 | } | |
449 | ||
450 | if (lv->status & CONVERTING) { | |
451 | log_error("Can't resize %s while lvconvert in progress", lv->name); | |
452 | return ECMD_FAILED; | |
453 | } | |
454 | ||
455 | alloc = (alloc_policy_t) arg_uint_value(cmd, alloc_ARG, lv->alloc); | |
456 | ||
457 | /* | |
458 | * First adjust to an exact multiple of extent size. | |
459 | * When extending by a relative amount we round that amount up. | |
460 | * When reducing by a relative amount we remove at most that amount. | |
461 | * When changing to an absolute size, we round that size up. | |
462 | */ | |
463 | if (lp->size) { | |
464 | if (lp->size % vg->extent_size) { | |
465 | if (lp->sign == SIGN_MINUS) | |
466 | lp->size -= lp->size % vg->extent_size; | |
467 | else | |
468 | lp->size += vg->extent_size - | |
469 | (lp->size % vg->extent_size); | |
470 | ||
471 | log_print("Rounding size to boundary between physical extents: %s", | |
472 | display_size(cmd, lp->size)); | |
473 | } | |
474 | ||
475 | lp->extents = lp->size / vg->extent_size; | |
476 | } | |
477 | ||
478 | if (!(pvh = lp->argc ? create_pv_list(cmd->mem, vg, lp->argc, | |
479 | lp->argv, 1) : &vg->pvs)) { | |
480 | stack; | |
481 | return ECMD_FAILED; | |
482 | } | |
483 | ||
484 | switch(lp->percent) { | |
485 | case PERCENT_VG: | |
486 | lp->extents = percent_of_extents(lp->extents, vg->extent_count, | |
487 | (lp->sign != SIGN_MINUS)); | |
488 | break; | |
489 | case PERCENT_FREE: | |
490 | lp->extents = percent_of_extents(lp->extents, vg->free_count, | |
491 | (lp->sign != SIGN_MINUS)); | |
492 | break; | |
493 | case PERCENT_LV: | |
494 | lp->extents = percent_of_extents(lp->extents, lv->le_count, | |
495 | (lp->sign != SIGN_MINUS)); | |
496 | break; | |
497 | case PERCENT_PVS: | |
498 | if (lp->argc) { | |
499 | pv_extent_count = pv_list_extents_free(pvh); | |
500 | lp->extents = percent_of_extents(lp->extents, pv_extent_count, | |
501 | (lp->sign != SIGN_MINUS)); | |
502 | } else | |
503 | lp->extents = percent_of_extents(lp->extents, vg->extent_count, | |
504 | (lp->sign != SIGN_MINUS)); | |
505 | break; | |
506 | case PERCENT_ORIGIN: | |
507 | if (!lv_is_cow(lv)) { | |
508 | log_error("Specified LV does not have an origin LV."); | |
509 | return EINVALID_CMD_LINE; | |
510 | } | |
511 | lp->extents = percent_of_extents(lp->extents, origin_from_cow(lv)->le_count, | |
512 | (lp->sign != SIGN_MINUS)); | |
513 | break; | |
514 | case PERCENT_NONE: | |
515 | break; | |
516 | } | |
517 | ||
518 | if (lp->sign == SIGN_PLUS) { | |
519 | if (lp->extents >= (MAX_EXTENT_COUNT - lv->le_count)) { | |
520 | log_error("Unable to extend %s by %u extents, exceeds limit (%u).", | |
521 | lp->lv_name, lv->le_count, MAX_EXTENT_COUNT); | |
522 | return EINVALID_CMD_LINE; | |
523 | } | |
524 | lp->extents += lv->le_count; | |
525 | } | |
526 | ||
527 | if (lp->sign == SIGN_MINUS) { | |
528 | if (lp->extents >= lv->le_count) { | |
529 | log_error("Unable to reduce %s below 1 extent", | |
530 | lp->lv_name); | |
531 | return EINVALID_CMD_LINE; | |
532 | } | |
533 | ||
534 | lp->extents = lv->le_count - lp->extents; | |
535 | } | |
536 | ||
537 | if (!lp->extents) { | |
538 | log_error("New size of 0 not permitted"); | |
539 | return EINVALID_CMD_LINE; | |
540 | } | |
541 | ||
542 | if (lp->extents == lv->le_count) { | |
543 | if (use_policy) | |
544 | return ECMD_PROCESSED; /* Nothing to do. */ | |
545 | if (!lp->resizefs) { | |
546 | log_error("New size (%d extents) matches existing size " | |
547 | "(%d extents)", lp->extents, lv->le_count); | |
548 | return EINVALID_CMD_LINE; | |
549 | } | |
550 | lp->resize = LV_EXTEND; /* lets pretend zero size extension */ | |
551 | } | |
552 | ||
553 | seg_size = lp->extents - lv->le_count; | |
554 | ||
555 | /* Use segment type of last segment */ | |
556 | dm_list_iterate_items(seg, &lv->segments) { | |
557 | lp->segtype = seg->segtype; | |
558 | } | |
559 | ||
560 | /* FIXME Support LVs with mixed segment types */ | |
561 | if (lp->segtype != get_segtype_from_string(cmd, arg_str_value(cmd, type_ARG, | |
562 | lp->segtype->name))) { | |
563 | log_error("VolumeType does not match (%s)", lp->segtype->name); | |
564 | return EINVALID_CMD_LINE; | |
565 | } | |
566 | ||
567 | /* If extending, find mirrors of last segment */ | |
568 | if ((lp->extents > lv->le_count)) { | |
569 | /* | |
570 | * Has the user specified that they would like the additional | |
571 | * extents of a mirror not to have an initial sync? | |
572 | */ | |
573 | if (seg_is_mirrored(first_seg(lv)) && arg_count(cmd, nosync_ARG)) | |
574 | lv->status |= LV_NOTSYNCED; | |
575 | ||
576 | dm_list_iterate_back_items(mirr_seg, &lv->segments) { | |
577 | if (seg_is_mirrored(mirr_seg)) | |
578 | seg_mirrors = lv_mirror_count(mirr_seg->lv); | |
579 | else | |
580 | seg_mirrors = 0; | |
581 | break; | |
582 | } | |
583 | if (!arg_count(cmd, mirrors_ARG) && seg_mirrors) { | |
584 | log_print("Extending %" PRIu32 " mirror images.", | |
585 | seg_mirrors); | |
586 | lp->mirrors = seg_mirrors; | |
587 | } | |
588 | if ((arg_count(cmd, mirrors_ARG) || seg_mirrors) && | |
589 | (lp->mirrors != seg_mirrors)) { | |
590 | log_error("Cannot vary number of mirrors in LV yet."); | |
591 | return EINVALID_CMD_LINE; | |
592 | } | |
593 | } | |
594 | ||
595 | /* If extending, find stripes, stripesize & size of last segment */ | |
596 | if ((lp->extents > lv->le_count) && | |
597 | !(lp->stripes == 1 || (lp->stripes > 1 && lp->stripe_size))) { | |
598 | /* FIXME Don't assume mirror seg will always be AREA_LV */ | |
599 | /* FIXME We will need to support resize for metadata LV as well, | |
600 | * and data LV could be any type (i.e. mirror)) */ | |
601 | dm_list_iterate_items(seg, seg_mirrors ? &seg_lv(mirr_seg, 0)->segments : | |
602 | lv_is_thin_pool(lv) ? &seg_lv(first_seg(lv), 0)->segments : &lv->segments) { | |
603 | if (!seg_is_striped(seg)) | |
604 | continue; | |
605 | ||
606 | sz = seg->stripe_size; | |
607 | str = seg->area_count; | |
608 | ||
609 | if ((seg_stripesize && seg_stripesize != sz && | |
610 | sz && !lp->stripe_size) || | |
611 | (seg_stripes && seg_stripes != str && !lp->stripes)) { | |
612 | log_error("Please specify number of " | |
613 | "stripes (-i) and stripesize (-I)"); | |
614 | return EINVALID_CMD_LINE; | |
615 | } | |
616 | ||
617 | seg_stripesize = sz; | |
618 | seg_stripes = str; | |
619 | } | |
620 | ||
621 | if (!lp->stripes) | |
622 | lp->stripes = seg_stripes; | |
623 | ||
624 | if (!lp->stripe_size && lp->stripes > 1) { | |
625 | if (seg_stripesize) { | |
626 | log_print("Using stripesize of last segment %s", | |
627 | display_size(cmd, (uint64_t) seg_stripesize)); | |
628 | lp->stripe_size = seg_stripesize; | |
629 | } else { | |
630 | lp->stripe_size = | |
631 | find_config_tree_int(cmd, | |
632 | "metadata/stripesize", | |
633 | DEFAULT_STRIPESIZE) * 2; | |
634 | log_print("Using default stripesize %s", | |
635 | display_size(cmd, (uint64_t) lp->stripe_size)); | |
636 | } | |
637 | } | |
638 | } | |
639 | ||
640 | /* If reducing, find stripes, stripesize & size of last segment */ | |
641 | if (lp->extents < lv->le_count) { | |
642 | extents_used = 0; | |
643 | ||
644 | if (lp->stripes || lp->stripe_size || lp->mirrors) | |
645 | log_error("Ignoring stripes, stripesize and mirrors " | |
646 | "arguments when reducing"); | |
647 | ||
648 | dm_list_iterate_items(seg, &lv->segments) { | |
649 | seg_extents = seg->len; | |
650 | ||
651 | /* Check for underlying stripe sizes */ | |
652 | seg_stripes = lvseg_get_stripes(seg, &seg_stripesize); | |
653 | ||
654 | if (seg_is_mirrored(seg)) | |
655 | seg_mirrors = lv_mirror_count(seg->lv); | |
656 | else | |
657 | seg_mirrors = 0; | |
658 | ||
659 | if (lp->extents <= extents_used + seg_extents) | |
660 | break; | |
661 | ||
662 | extents_used += seg_extents; | |
663 | } | |
664 | ||
665 | seg_size = lp->extents - extents_used; | |
666 | lp->stripe_size = seg_stripesize; | |
667 | lp->stripes = seg_stripes; | |
668 | lp->mirrors = seg_mirrors; | |
669 | } | |
670 | ||
671 | if (lp->stripes > 1 && !lp->stripe_size) { | |
672 | log_error("Stripesize for striped segment should not be 0!"); | |
673 | return EINVALID_CMD_LINE; | |
674 | } | |
675 | ||
676 | if (lp->stripes > 1) { | |
677 | if (lp->stripe_size < STRIPE_SIZE_MIN) { | |
678 | log_error("Invalid stripe size %s", | |
679 | display_size(cmd, (uint64_t) lp->stripe_size)); | |
680 | return EINVALID_CMD_LINE; | |
681 | } | |
682 | ||
683 | if (!(stripesize_extents = lp->stripe_size / vg->extent_size)) | |
684 | stripesize_extents = 1; | |
685 | ||
686 | size_rest = seg_size % (lp->stripes * stripesize_extents); | |
687 | /* Round toward the original size. */ | |
688 | if (size_rest && | |
689 | ((lp->extents < lv->le_count) || | |
690 | !lp->percent || | |
691 | (vg->free_count >= (lp->extents - lv->le_count - size_rest + | |
692 | (lp->stripes * stripesize_extents))))) { | |
693 | log_print("Rounding size (%d extents) up to stripe " | |
694 | "boundary size for segment (%d extents)", | |
695 | lp->extents, lp->extents - size_rest + | |
696 | (lp->stripes * stripesize_extents)); | |
697 | lp->extents = lp->extents - size_rest + | |
698 | (lp->stripes * stripesize_extents); | |
699 | } else if (size_rest) { | |
700 | log_print("Rounding size (%d extents) down to stripe " | |
701 | "boundary size for segment (%d extents)", | |
702 | lp->extents, lp->extents - size_rest); | |
703 | lp->extents = lp->extents - size_rest; | |
704 | } | |
705 | } | |
706 | ||
707 | if (lp->extents < lv->le_count) { | |
708 | if (lp->resize == LV_EXTEND) { | |
709 | log_error("New size given (%d extents) not larger " | |
710 | "than existing size (%d extents)", | |
711 | lp->extents, lv->le_count); | |
712 | return EINVALID_CMD_LINE; | |
713 | } | |
714 | lp->resize = LV_REDUCE; | |
715 | } else if (lp->extents > lv->le_count) { | |
716 | if (lp->resize == LV_REDUCE) { | |
717 | log_error("New size given (%d extents) not less than " | |
718 | "existing size (%d extents)", lp->extents, | |
719 | lv->le_count); | |
720 | return EINVALID_CMD_LINE; | |
721 | } | |
722 | lp->resize = LV_EXTEND; | |
723 | } else if (lp->extents == lv->le_count) { | |
724 | if (use_policy) | |
725 | return ECMD_PROCESSED; /* Nothing to do. */ | |
726 | if (!lp->resizefs) { | |
727 | log_error("New size (%d extents) matches existing size " | |
728 | "(%d extents)", lp->extents, lv->le_count); | |
729 | return EINVALID_CMD_LINE; | |
730 | } | |
731 | lp->resize = LV_EXTEND; | |
732 | } | |
733 | ||
734 | if (lv_is_origin(lv)) { | |
735 | if (lp->resize == LV_REDUCE) { | |
736 | log_error("Snapshot origin volumes cannot be reduced " | |
737 | "in size yet."); | |
738 | return ECMD_FAILED; | |
739 | } | |
740 | ||
741 | memset(&info, 0, sizeof(info)); | |
742 | ||
743 | if (lv_info(cmd, lv, 0, &info, 0, 0) && info.exists) { | |
744 | log_error("Snapshot origin volumes can be resized " | |
745 | "only while inactive: try lvchange -an"); | |
746 | return ECMD_FAILED; | |
747 | } | |
748 | } | |
749 | ||
750 | if (lv_is_thin_pool(lv)) { | |
751 | if (lp->resize == LV_REDUCE) { | |
752 | log_error("Thin pool volumes cannot be reduced in size yet."); | |
753 | return ECMD_FAILED; | |
754 | } | |
755 | ||
756 | if (lp->resizefs) { | |
757 | log_warn("Thin pool volumes do not have filesystem."); | |
758 | lp->resizefs = 0; | |
759 | } | |
760 | } | |
761 | ||
762 | if ((lp->resize == LV_REDUCE) && lp->argc) | |
763 | log_warn("Ignoring PVs on command line when reducing"); | |
764 | ||
765 | /* Request confirmation before operations that are often mistakes. */ | |
766 | if ((lp->resizefs || (lp->resize == LV_REDUCE)) && | |
767 | !_request_confirmation(cmd, vg, lv, lp)) { | |
768 | stack; | |
769 | return ECMD_FAILED; | |
770 | } | |
771 | ||
772 | if (lp->resizefs) { | |
773 | if (!lp->nofsck && | |
774 | !_fsadm_cmd(cmd, vg, lp, FSADM_CMD_CHECK, &status)) { | |
775 | if (status != FSADM_CHECK_FAILS_FOR_MOUNTED) { | |
776 | log_error("Filesystem check failed."); | |
777 | return ECMD_FAILED; | |
778 | } | |
779 | /* some filesystems supports online resize */ | |
780 | } | |
781 | ||
782 | if ((lp->resize == LV_REDUCE) && | |
783 | !_fsadm_cmd(cmd, vg, lp, FSADM_CMD_RESIZE, NULL)) { | |
784 | log_error("Filesystem resize failed."); | |
785 | return ECMD_FAILED; | |
786 | } | |
787 | } | |
788 | ||
789 | if (!archive(vg)) { | |
790 | stack; | |
791 | return ECMD_FAILED; | |
792 | } | |
793 | ||
794 | log_print("%sing logical volume %s to %s", | |
795 | (lp->resize == LV_REDUCE) ? "Reduc" : "Extend", | |
796 | lp->lv_name, | |
797 | display_size(cmd, (uint64_t) lp->extents * vg->extent_size)); | |
798 | ||
799 | if (lp->resize == LV_REDUCE) { | |
800 | if (!lv_reduce(lv, lv->le_count - lp->extents)) { | |
801 | stack; | |
802 | return ECMD_FAILED; | |
803 | } | |
804 | } else if ((lp->extents > lv->le_count) && /* Ensure we extend */ | |
805 | !lv_extend(lv, lp->segtype, | |
806 | lp->stripes, lp->stripe_size, | |
807 | lp->mirrors, first_seg(lv)->region_size, | |
808 | lp->extents - lv->le_count, NULL, | |
809 | pvh, alloc)) { | |
810 | stack; | |
811 | return ECMD_FAILED; | |
812 | } | |
813 | ||
814 | /* store vg on disk(s) */ | |
815 | if (!vg_write(vg)) { | |
816 | stack; | |
817 | return ECMD_FAILED; | |
818 | } | |
819 | ||
820 | /* If snapshot, must suspend all associated devices */ | |
821 | if (lv_is_cow(lv)) | |
822 | lock_lv = origin_from_cow(lv); | |
823 | else | |
824 | lock_lv = lv; | |
825 | ||
826 | if (!suspend_lv(cmd, lock_lv)) { | |
827 | log_error("Failed to suspend %s", lp->lv_name); | |
828 | vg_revert(vg); | |
829 | backup(vg); | |
830 | return ECMD_FAILED; | |
831 | } | |
832 | ||
833 | if (!vg_commit(vg)) { | |
834 | stack; | |
835 | if (!resume_lv(cmd, lock_lv)) | |
836 | stack; | |
837 | backup(vg); | |
838 | return ECMD_FAILED; | |
839 | } | |
840 | ||
841 | if (!resume_lv(cmd, lock_lv)) { | |
842 | log_error("Problem reactivating %s", lp->lv_name); | |
843 | backup(vg); | |
844 | return ECMD_FAILED; | |
845 | } | |
846 | ||
847 | backup(vg); | |
848 | ||
849 | /* | |
850 | * Update lvm pool metadata (drop messages) if the pool has been | |
851 | * resumed and do a pool active/deactivate in other case. | |
852 | * | |
853 | * Note: Active thin pool can be waiting for resize. | |
854 | * | |
855 | * FIXME: Activate only when thin volume is active | |
856 | */ | |
857 | if (lv_is_thin_pool(lv) && | |
858 | !update_pool_lv(lv, !lv_is_active(lv))) { | |
859 | stack; | |
860 | return ECMD_FAILED; | |
861 | } | |
862 | ||
863 | log_print("Logical volume %s successfully resized", lp->lv_name); | |
864 | ||
865 | if (lp->resizefs && (lp->resize == LV_EXTEND) && | |
866 | !_fsadm_cmd(cmd, vg, lp, FSADM_CMD_RESIZE, NULL)) { | |
867 | stack; | |
868 | return ECMD_FAILED; | |
869 | } | |
870 | ||
871 | return ECMD_PROCESSED; | |
872 | } | |
873 | ||
874 | int lvresize(struct cmd_context *cmd, int argc, char **argv) | |
875 | { | |
876 | struct lvresize_params lp; | |
877 | struct volume_group *vg; | |
878 | int r; | |
879 | ||
880 | memset(&lp, 0, sizeof(lp)); | |
881 | ||
882 | if (!_lvresize_params(cmd, argc, argv, &lp)) | |
883 | return EINVALID_CMD_LINE; | |
884 | ||
885 | log_verbose("Finding volume group %s", lp.vg_name); | |
886 | vg = vg_read_for_update(cmd, lp.vg_name, NULL, 0); | |
887 | if (vg_read_error(vg)) { | |
888 | release_vg(vg); | |
889 | stack; | |
890 | return ECMD_FAILED; | |
891 | } | |
892 | ||
893 | if (!(r = _lvresize(cmd, vg, &lp))) | |
894 | stack; | |
895 | ||
896 | unlock_and_release_vg(cmd, vg, lp.vg_name); | |
897 | ||
898 | return r; | |
899 | } |