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Commit | Line | Data |
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e5329c37 NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
6f02172d | 4 | * Copyright (C) 2001-2013 Neil Brown <neilb@suse.de> |
e5329c37 NB |
5 | * |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
e736b623 | 22 | * Email: <neilb@suse.de> |
e5329c37 NB |
23 | */ |
24 | #include "mdadm.h" | |
25 | #include "dlink.h" | |
7236ee7a | 26 | #include <sys/mman.h> |
04f903b2 | 27 | #include <stddef.h> |
f9b08fec | 28 | #include <stdint.h> |
84d11e6c | 29 | #include <signal.h> |
5e76dce1 | 30 | #include <sys/wait.h> |
e5329c37 NB |
31 | |
32 | #if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN) | |
33 | #error no endian defined | |
34 | #endif | |
35 | #include "md_u.h" | |
36 | #include "md_p.h" | |
37 | ||
3f54bd62 AK |
38 | int restore_backup(struct supertype *st, |
39 | struct mdinfo *content, | |
40 | int working_disks, | |
41 | int next_spare, | |
54ded86f | 42 | char **backup_filep, |
3f54bd62 AK |
43 | int verbose) |
44 | { | |
45 | int i; | |
46 | int *fdlist; | |
47 | struct mdinfo *dev; | |
48 | int err; | |
49 | int disk_count = next_spare + working_disks; | |
54ded86f | 50 | char *backup_file = *backup_filep; |
3f54bd62 AK |
51 | |
52 | dprintf("Called restore_backup()\n"); | |
503975b9 N |
53 | fdlist = xmalloc(sizeof(int) * disk_count); |
54 | ||
a7dec3fd | 55 | enable_fds(next_spare); |
3f54bd62 AK |
56 | for (i = 0; i < next_spare; i++) |
57 | fdlist[i] = -1; | |
58 | for (dev = content->devs; dev; dev = dev->next) { | |
59 | char buf[22]; | |
60 | int fd; | |
358ef9bf JS |
61 | |
62 | sprintf(buf, "%d:%d", dev->disk.major, dev->disk.minor); | |
3f54bd62 AK |
63 | fd = dev_open(buf, O_RDWR); |
64 | ||
65 | if (dev->disk.raid_disk >= 0) | |
66 | fdlist[dev->disk.raid_disk] = fd; | |
67 | else | |
68 | fdlist[next_spare++] = fd; | |
69 | } | |
70 | ||
54ded86f N |
71 | if (!backup_file) { |
72 | backup_file = locate_backup(content->sys_name); | |
73 | *backup_filep = backup_file; | |
74 | } | |
75 | ||
3f54bd62 AK |
76 | if (st->ss->external && st->ss->recover_backup) |
77 | err = st->ss->recover_backup(st, content); | |
78 | else | |
79 | err = Grow_restart(st, content, fdlist, next_spare, | |
80 | backup_file, verbose > 0); | |
81 | ||
82 | while (next_spare > 0) { | |
cc7f63e5 N |
83 | next_spare--; |
84 | if (fdlist[next_spare] >= 0) | |
85 | close(fdlist[next_spare]); | |
3f54bd62 AK |
86 | } |
87 | free(fdlist); | |
88 | if (err) { | |
7a862a02 | 89 | pr_err("Failed to restore critical section for reshape - sorry.\n"); |
3f54bd62 | 90 | if (!backup_file) |
7a862a02 | 91 | pr_err("Possibly you need to specify a --backup-file\n"); |
3f54bd62 AK |
92 | return 1; |
93 | } | |
94 | ||
95 | dprintf("restore_backup() returns status OK.\n"); | |
96 | return 0; | |
97 | } | |
98 | ||
e5329c37 NB |
99 | int Grow_Add_device(char *devname, int fd, char *newdev) |
100 | { | |
101 | /* Add a device to an active array. | |
102 | * Currently, just extend a linear array. | |
103 | * This requires writing a new superblock on the | |
104 | * new device, calling the kernel to add the device, | |
105 | * and if that succeeds, update the superblock on | |
106 | * all other devices. | |
107 | * This means that we need to *find* all other devices. | |
108 | */ | |
4b1ac34b NB |
109 | struct mdinfo info; |
110 | ||
0a6bff09 | 111 | dev_t rdev; |
e5329c37 NB |
112 | int nfd, fd2; |
113 | int d, nd; | |
82d9eba6 | 114 | struct supertype *st = NULL; |
4725bc31 | 115 | char *subarray = NULL; |
e5329c37 | 116 | |
9cd39f01 | 117 | if (md_get_array_info(fd, &info.array) < 0) { |
e7b84f9d | 118 | pr_err("cannot get array info for %s\n", devname); |
e5329c37 NB |
119 | return 1; |
120 | } | |
121 | ||
4725bc31 | 122 | if (info.array.level != -1) { |
e7b84f9d | 123 | pr_err("can only add devices to linear arrays\n"); |
4725bc31 N |
124 | return 1; |
125 | } | |
126 | ||
127 | st = super_by_fd(fd, &subarray); | |
82d9eba6 | 128 | if (!st) { |
ca3b6696 N |
129 | pr_err("cannot handle arrays with superblock version %d\n", |
130 | info.array.major_version); | |
f9ce90ba NB |
131 | return 1; |
132 | } | |
133 | ||
4725bc31 | 134 | if (subarray) { |
e7b84f9d | 135 | pr_err("Cannot grow linear sub-arrays yet\n"); |
4725bc31 N |
136 | free(subarray); |
137 | free(st); | |
2641101b | 138 | return 1; |
e5329c37 NB |
139 | } |
140 | ||
6416d527 | 141 | nfd = open(newdev, O_RDWR|O_EXCL|O_DIRECT); |
e5329c37 | 142 | if (nfd < 0) { |
e7b84f9d | 143 | pr_err("cannot open %s\n", newdev); |
4725bc31 | 144 | free(st); |
e5329c37 NB |
145 | return 1; |
146 | } | |
0a6bff09 | 147 | if (!fstat_is_blkdev(nfd, newdev, &rdev)) { |
e5329c37 | 148 | close(nfd); |
4725bc31 | 149 | free(st); |
e5329c37 NB |
150 | return 1; |
151 | } | |
ca3b6696 N |
152 | /* now check out all the devices and make sure we can read the |
153 | * superblock */ | |
4b1ac34b | 154 | for (d=0 ; d < info.array.raid_disks ; d++) { |
e5329c37 NB |
155 | mdu_disk_info_t disk; |
156 | char *dv; | |
157 | ||
4725bc31 N |
158 | st->ss->free_super(st); |
159 | ||
e5329c37 | 160 | disk.number = d; |
d97572f5 | 161 | if (md_get_disk_info(fd, &disk) < 0) { |
358ef9bf | 162 | pr_err("cannot get device detail for device %d\n", d); |
4725bc31 N |
163 | close(nfd); |
164 | free(st); | |
e5329c37 NB |
165 | return 1; |
166 | } | |
16c6fa80 | 167 | dv = map_dev(disk.major, disk.minor, 1); |
e5329c37 | 168 | if (!dv) { |
358ef9bf | 169 | pr_err("cannot find device file for device %d\n", d); |
4725bc31 N |
170 | close(nfd); |
171 | free(st); | |
e5329c37 NB |
172 | return 1; |
173 | } | |
16c6fa80 | 174 | fd2 = dev_open(dv, O_RDWR); |
68fe8c6e | 175 | if (fd2 < 0) { |
e7b84f9d | 176 | pr_err("cannot open device file %s\n", dv); |
4725bc31 N |
177 | close(nfd); |
178 | free(st); | |
e5329c37 NB |
179 | return 1; |
180 | } | |
3da92f27 NB |
181 | |
182 | if (st->ss->load_super(st, fd2, NULL)) { | |
e7b84f9d | 183 | pr_err("cannot find super block on %s\n", dv); |
4725bc31 | 184 | close(nfd); |
e5329c37 | 185 | close(fd2); |
4725bc31 | 186 | free(st); |
e5329c37 NB |
187 | return 1; |
188 | } | |
189 | close(fd2); | |
190 | } | |
191 | /* Ok, looks good. Lets update the superblock and write it out to | |
192 | * newdev. | |
193 | */ | |
aba69144 | 194 | |
4b1ac34b | 195 | info.disk.number = d; |
0a6bff09 ZL |
196 | info.disk.major = major(rdev); |
197 | info.disk.minor = minor(rdev); | |
4b1ac34b NB |
198 | info.disk.raid_disk = d; |
199 | info.disk.state = (1 << MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE); | |
358ef9bf | 200 | st->ss->update_super(st, &info, "linear-grow-new", newdev, 0, 0, NULL); |
e5329c37 | 201 | |
3da92f27 | 202 | if (st->ss->store_super(st, nfd)) { |
358ef9bf | 203 | pr_err("Cannot store new superblock on %s\n", newdev); |
e5329c37 NB |
204 | close(nfd); |
205 | return 1; | |
206 | } | |
e5329c37 | 207 | close(nfd); |
4b1ac34b NB |
208 | |
209 | if (ioctl(fd, ADD_NEW_DISK, &info.disk) != 0) { | |
e7b84f9d | 210 | pr_err("Cannot add new disk to this array\n"); |
e5329c37 NB |
211 | return 1; |
212 | } | |
213 | /* Well, that seems to have worked. | |
214 | * Now go through and update all superblocks | |
215 | */ | |
216 | ||
9cd39f01 | 217 | if (md_get_array_info(fd, &info.array) < 0) { |
e7b84f9d | 218 | pr_err("cannot get array info for %s\n", devname); |
e5329c37 NB |
219 | return 1; |
220 | } | |
221 | ||
222 | nd = d; | |
4b1ac34b | 223 | for (d=0 ; d < info.array.raid_disks ; d++) { |
e5329c37 NB |
224 | mdu_disk_info_t disk; |
225 | char *dv; | |
226 | ||
227 | disk.number = d; | |
d97572f5 | 228 | if (md_get_disk_info(fd, &disk) < 0) { |
358ef9bf | 229 | pr_err("cannot get device detail for device %d\n", d); |
e5329c37 NB |
230 | return 1; |
231 | } | |
16c6fa80 | 232 | dv = map_dev(disk.major, disk.minor, 1); |
e5329c37 | 233 | if (!dv) { |
358ef9bf | 234 | pr_err("cannot find device file for device %d\n", d); |
e5329c37 NB |
235 | return 1; |
236 | } | |
16c6fa80 | 237 | fd2 = dev_open(dv, O_RDWR); |
e5329c37 | 238 | if (fd2 < 0) { |
e7b84f9d | 239 | pr_err("cannot open device file %s\n", dv); |
e5329c37 NB |
240 | return 1; |
241 | } | |
3da92f27 | 242 | if (st->ss->load_super(st, fd2, NULL)) { |
e7b84f9d | 243 | pr_err("cannot find super block on %s\n", dv); |
e5329c37 NB |
244 | close(fd); |
245 | return 1; | |
246 | } | |
4b1ac34b NB |
247 | info.array.raid_disks = nd+1; |
248 | info.array.nr_disks = nd+1; | |
249 | info.array.active_disks = nd+1; | |
250 | info.array.working_disks = nd+1; | |
f752781f | 251 | |
3da92f27 | 252 | st->ss->update_super(st, &info, "linear-grow-update", dv, |
f752781f | 253 | 0, 0, NULL); |
aba69144 | 254 | |
3da92f27 | 255 | if (st->ss->store_super(st, fd2)) { |
e7b84f9d | 256 | pr_err("Cannot store new superblock on %s\n", dv); |
e5329c37 NB |
257 | close(fd2); |
258 | return 1; | |
259 | } | |
260 | close(fd2); | |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
f5e166fe | 265 | |
50f01ba5 | 266 | int Grow_addbitmap(char *devname, int fd, struct context *c, struct shape *s) |
f5e166fe NB |
267 | { |
268 | /* | |
269 | * First check that array doesn't have a bitmap | |
270 | * Then create the bitmap | |
271 | * Then add it | |
272 | * | |
273 | * For internal bitmaps, we need to check the version, | |
274 | * find all the active devices, and write the bitmap block | |
275 | * to all devices | |
276 | */ | |
277 | mdu_bitmap_file_t bmf; | |
278 | mdu_array_info_t array; | |
279 | struct supertype *st; | |
4725bc31 | 280 | char *subarray = NULL; |
dcec9ee5 | 281 | int major = BITMAP_MAJOR_HI; |
8fac0577 | 282 | unsigned long long bitmapsize, array_size; |
e97a7cd0 | 283 | struct mdinfo *mdi; |
dcec9ee5 | 284 | |
efdfcc9e JS |
285 | /* |
286 | * We only ever get called if s->bitmap_file is != NULL, so this check | |
287 | * is just here to quiet down static code checkers. | |
288 | */ | |
289 | if (!s->bitmap_file) | |
290 | return 1; | |
291 | ||
292 | if (strcmp(s->bitmap_file, "clustered") == 0) | |
6d9c7c25 GR |
293 | major = BITMAP_MAJOR_CLUSTERED; |
294 | ||
f5e166fe | 295 | if (ioctl(fd, GET_BITMAP_FILE, &bmf) != 0) { |
353632d9 | 296 | if (errno == ENOMEM) |
e7b84f9d | 297 | pr_err("Memory allocation failure.\n"); |
f5e166fe | 298 | else |
e7b84f9d | 299 | pr_err("bitmaps not supported by this kernel.\n"); |
f5e166fe NB |
300 | return 1; |
301 | } | |
302 | if (bmf.pathname[0]) { | |
6ac963ce JS |
303 | if (strcmp(s->bitmap_file,"none") == 0) { |
304 | if (ioctl(fd, SET_BITMAP_FILE, -1) != 0) { | |
e7b84f9d | 305 | pr_err("failed to remove bitmap %s\n", |
fe80f49b NB |
306 | bmf.pathname); |
307 | return 1; | |
308 | } | |
309 | return 0; | |
310 | } | |
358ef9bf | 311 | pr_err("%s already has a bitmap (%s)\n", devname, bmf.pathname); |
f5e166fe NB |
312 | return 1; |
313 | } | |
9cd39f01 | 314 | if (md_get_array_info(fd, &array) != 0) { |
e7b84f9d | 315 | pr_err("cannot get array status for %s\n", devname); |
f5e166fe NB |
316 | return 1; |
317 | } | |
6ac963ce | 318 | if (array.state & (1 << MD_SB_BITMAP_PRESENT)) { |
50f01ba5 | 319 | if (strcmp(s->bitmap_file, "none")==0) { |
6ac963ce | 320 | array.state &= ~(1 << MD_SB_BITMAP_PRESENT); |
018a4882 | 321 | if (md_set_array_info(fd, &array) != 0) { |
6ac963ce | 322 | if (array.state & (1 << MD_SB_CLUSTERED)) |
37d0ca9b GJ |
323 | pr_err("failed to remove clustered bitmap.\n"); |
324 | else | |
325 | pr_err("failed to remove internal bitmap.\n"); | |
fe80f49b NB |
326 | return 1; |
327 | } | |
328 | return 0; | |
329 | } | |
37d0ca9b | 330 | pr_err("bitmap already present on %s\n", devname); |
f5e166fe NB |
331 | return 1; |
332 | } | |
4725bc31 | 333 | |
50f01ba5 | 334 | if (strcmp(s->bitmap_file, "none") == 0) { |
e7b84f9d | 335 | pr_err("no bitmap found on %s\n", devname); |
4725bc31 N |
336 | return 1; |
337 | } | |
5b28bd56 | 338 | if (array.level <= 0) { |
e7b84f9d | 339 | pr_err("Bitmaps not meaningful with level %s\n", |
5b28bd56 NB |
340 | map_num(pers, array.level)?:"of this array"); |
341 | return 1; | |
342 | } | |
8fac0577 NB |
343 | bitmapsize = array.size; |
344 | bitmapsize <<= 1; | |
beae1dfe | 345 | if (get_dev_size(fd, NULL, &array_size) && |
6ac963ce | 346 | array_size > (0x7fffffffULL << 9)) { |
8fac0577 NB |
347 | /* Array is big enough that we cannot trust array.size |
348 | * try other approaches | |
349 | */ | |
350 | bitmapsize = get_component_size(fd); | |
351 | } | |
8fac0577 | 352 | if (bitmapsize == 0) { |
e7b84f9d | 353 | pr_err("Cannot reliably determine size of array to create bitmap - sorry.\n"); |
8fac0577 NB |
354 | return 1; |
355 | } | |
356 | ||
f9c25f1d | 357 | if (array.level == 10) { |
6ac963ce JS |
358 | int ncopies; |
359 | ||
360 | ncopies = (array.layout & 255) * ((array.layout >> 8) & 255); | |
f9c25f1d | 361 | bitmapsize = bitmapsize * array.raid_disks / ncopies; |
5339f996 GJ |
362 | |
363 | if (strcmp(s->bitmap_file, "clustered") == 0 && | |
364 | !is_near_layout_10(array.layout)) { | |
365 | pr_err("only near layout is supported with clustered raid10\n"); | |
366 | return 1; | |
367 | } | |
f9c25f1d NB |
368 | } |
369 | ||
4725bc31 | 370 | st = super_by_fd(fd, &subarray); |
f5e166fe | 371 | if (!st) { |
e7b84f9d | 372 | pr_err("Cannot understand version %d.%d\n", |
f5e166fe NB |
373 | array.major_version, array.minor_version); |
374 | return 1; | |
375 | } | |
4725bc31 | 376 | if (subarray) { |
e7b84f9d | 377 | pr_err("Cannot add bitmaps to sub-arrays yet\n"); |
4725bc31 N |
378 | free(subarray); |
379 | free(st); | |
fe80f49b | 380 | return 1; |
4725bc31 | 381 | } |
e97a7cd0 AP |
382 | |
383 | mdi = sysfs_read(fd, NULL, GET_CONSISTENCY_POLICY); | |
384 | if (mdi) { | |
385 | if (mdi->consistency_policy == CONSISTENCY_POLICY_PPL) { | |
386 | pr_err("Cannot add bitmap to array with PPL\n"); | |
387 | free(mdi); | |
388 | free(st); | |
389 | return 1; | |
390 | } | |
391 | free(mdi); | |
392 | } | |
393 | ||
7c25f4d7 GJ |
394 | if (strcmp(s->bitmap_file, "internal") == 0 || |
395 | strcmp(s->bitmap_file, "clustered") == 0) { | |
c0c1acd6 | 396 | int rv; |
f5e166fe | 397 | int d; |
c0c1acd6 | 398 | int offset_setable = 0; |
ebeb3663 | 399 | if (st->ss->add_internal_bitmap == NULL) { |
7a862a02 | 400 | pr_err("Internal bitmaps not supported with %s metadata\n", st->ss->name); |
ebeb3663 N |
401 | return 1; |
402 | } | |
7c25f4d7 GJ |
403 | st->nodes = c->nodes; |
404 | st->cluster_name = c->homecluster; | |
4dd2df09 | 405 | mdi = sysfs_read(fd, NULL, GET_BITMAP_LOCATION); |
c0c1acd6 N |
406 | if (mdi) |
407 | offset_setable = 1; | |
6ac963ce | 408 | for (d = 0; d < st->max_devs; d++) { |
f5e166fe NB |
409 | mdu_disk_info_t disk; |
410 | char *dv; | |
dac1b111 JS |
411 | int fd2; |
412 | ||
f5e166fe | 413 | disk.number = d; |
d97572f5 | 414 | if (md_get_disk_info(fd, &disk) < 0) |
f5e166fe | 415 | continue; |
6ac963ce | 416 | if (disk.major == 0 && disk.minor == 0) |
f5e166fe | 417 | continue; |
6ac963ce | 418 | if ((disk.state & (1 << MD_DISK_SYNC)) == 0) |
f5e166fe | 419 | continue; |
16c6fa80 | 420 | dv = map_dev(disk.major, disk.minor, 1); |
dac1b111 JS |
421 | if (!dv) |
422 | continue; | |
423 | fd2 = dev_open(dv, O_RDWR); | |
424 | if (fd2 < 0) | |
425 | continue; | |
c152f361 JS |
426 | rv = st->ss->load_super(st, fd2, NULL); |
427 | if (!rv) { | |
4ed129ac JS |
428 | rv = st->ss->add_internal_bitmap( |
429 | st, &s->bitmap_chunk, c->delay, | |
430 | s->write_behind, bitmapsize, | |
431 | offset_setable, major); | |
432 | if (!rv) { | |
433 | st->ss->write_bitmap(st, fd2, | |
434 | NodeNumUpdate); | |
435 | } else { | |
dac1b111 | 436 | pr_err("failed to create internal bitmap - chunksize problem.\n"); |
f5e166fe | 437 | } |
c152f361 JS |
438 | } else { |
439 | pr_err("failed to load super-block.\n"); | |
f5e166fe | 440 | } |
dac1b111 | 441 | close(fd2); |
4ed129ac JS |
442 | if (rv) |
443 | return 1; | |
f5e166fe | 444 | } |
c0c1acd6 N |
445 | if (offset_setable) { |
446 | st->ss->getinfo_super(st, mdi, NULL); | |
dae13137 JS |
447 | if (sysfs_init(mdi, fd, NULL)) { |
448 | pr_err("failed to intialize sysfs.\n"); | |
449 | free(mdi); | |
450 | } | |
012a8641 JS |
451 | rv = sysfs_set_num_signed(mdi, NULL, "bitmap/location", |
452 | mdi->bitmap_offset); | |
e97a7cd0 | 453 | free(mdi); |
c0c1acd6 | 454 | } else { |
7c25f4d7 | 455 | if (strcmp(s->bitmap_file, "clustered") == 0) |
6ac963ce JS |
456 | array.state |= (1 << MD_SB_CLUSTERED); |
457 | array.state |= (1 << MD_SB_BITMAP_PRESENT); | |
018a4882 | 458 | rv = md_set_array_info(fd, &array); |
c0c1acd6 N |
459 | } |
460 | if (rv < 0) { | |
ff634064 | 461 | if (errno == EBUSY) |
7a862a02 | 462 | pr_err("Cannot add bitmap while array is resyncing or reshaping etc.\n"); |
e7b84f9d | 463 | pr_err("failed to set internal bitmap.\n"); |
f5e166fe NB |
464 | return 1; |
465 | } | |
fe80f49b NB |
466 | } else { |
467 | int uuid[4]; | |
468 | int bitmap_fd; | |
469 | int d; | |
470 | int max_devs = st->max_devs; | |
fe80f49b NB |
471 | |
472 | /* try to load a superblock */ | |
ca3b6696 | 473 | for (d = 0; d < max_devs; d++) { |
fe80f49b NB |
474 | mdu_disk_info_t disk; |
475 | char *dv; | |
476 | int fd2; | |
477 | disk.number = d; | |
d97572f5 | 478 | if (md_get_disk_info(fd, &disk) < 0) |
fe80f49b | 479 | continue; |
6ac963ce JS |
480 | if ((disk.major==0 && disk.minor == 0) || |
481 | (disk.state & (1 << MD_DISK_REMOVED))) | |
fe80f49b | 482 | continue; |
16c6fa80 | 483 | dv = map_dev(disk.major, disk.minor, 1); |
ca3b6696 N |
484 | if (!dv) |
485 | continue; | |
16c6fa80 | 486 | fd2 = dev_open(dv, O_RDONLY); |
e7344e90 JS |
487 | if (fd2 >= 0) { |
488 | if (st->ss->load_super(st, fd2, NULL) == 0) { | |
489 | close(fd2); | |
490 | st->ss->uuid_from_super(st, uuid); | |
491 | break; | |
492 | } | |
fe80f49b | 493 | close(fd2); |
fe80f49b | 494 | } |
fe80f49b NB |
495 | } |
496 | if (d == max_devs) { | |
e7b84f9d | 497 | pr_err("cannot find UUID for array!\n"); |
fe80f49b NB |
498 | return 1; |
499 | } | |
6ac963ce JS |
500 | if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, |
501 | s->bitmap_chunk, c->delay, s->write_behind, | |
502 | bitmapsize, major)) { | |
fe80f49b NB |
503 | return 1; |
504 | } | |
50f01ba5 | 505 | bitmap_fd = open(s->bitmap_file, O_RDWR); |
fe80f49b | 506 | if (bitmap_fd < 0) { |
6ac963ce | 507 | pr_err("weird: %s cannot be opened\n", s->bitmap_file); |
fe80f49b NB |
508 | return 1; |
509 | } | |
510 | if (ioctl(fd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
ff634064 N |
511 | int err = errno; |
512 | if (errno == EBUSY) | |
7a862a02 | 513 | pr_err("Cannot add bitmap while array is resyncing or reshaping etc.\n"); |
e7b84f9d | 514 | pr_err("Cannot set bitmap file for %s: %s\n", |
ff634064 | 515 | devname, strerror(err)); |
fe80f49b NB |
516 | return 1; |
517 | } | |
518 | } | |
f5e166fe NB |
519 | |
520 | return 0; | |
521 | } | |
522 | ||
860f11ed AP |
523 | int Grow_consistency_policy(char *devname, int fd, struct context *c, struct shape *s) |
524 | { | |
525 | struct supertype *st; | |
526 | struct mdinfo *sra; | |
527 | struct mdinfo *sd; | |
528 | char *subarray = NULL; | |
529 | int ret = 0; | |
530 | char container_dev[PATH_MAX]; | |
922a5829 | 531 | char buf[20]; |
860f11ed AP |
532 | |
533 | if (s->consistency_policy != CONSISTENCY_POLICY_RESYNC && | |
534 | s->consistency_policy != CONSISTENCY_POLICY_PPL) { | |
535 | pr_err("Operation not supported for consistency policy %s\n", | |
536 | map_num(consistency_policies, s->consistency_policy)); | |
537 | return 1; | |
538 | } | |
539 | ||
540 | st = super_by_fd(fd, &subarray); | |
541 | if (!st) | |
542 | return 1; | |
543 | ||
544 | sra = sysfs_read(fd, NULL, GET_CONSISTENCY_POLICY|GET_LEVEL| | |
545 | GET_DEVS|GET_STATE); | |
546 | if (!sra) { | |
547 | ret = 1; | |
548 | goto free_st; | |
549 | } | |
550 | ||
551 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL && | |
552 | !st->ss->write_init_ppl) { | |
553 | pr_err("%s metadata does not support PPL\n", st->ss->name); | |
554 | ret = 1; | |
555 | goto free_info; | |
556 | } | |
557 | ||
558 | if (sra->array.level != 5) { | |
559 | pr_err("Operation not supported for array level %d\n", | |
560 | sra->array.level); | |
561 | ret = 1; | |
562 | goto free_info; | |
563 | } | |
564 | ||
565 | if (sra->consistency_policy == (unsigned)s->consistency_policy) { | |
566 | pr_err("Consistency policy is already %s\n", | |
567 | map_num(consistency_policies, s->consistency_policy)); | |
568 | ret = 1; | |
569 | goto free_info; | |
570 | } else if (sra->consistency_policy != CONSISTENCY_POLICY_RESYNC && | |
571 | sra->consistency_policy != CONSISTENCY_POLICY_PPL) { | |
572 | pr_err("Current consistency policy is %s, cannot change to %s\n", | |
573 | map_num(consistency_policies, sra->consistency_policy), | |
574 | map_num(consistency_policies, s->consistency_policy)); | |
575 | ret = 1; | |
576 | goto free_info; | |
577 | } | |
578 | ||
922a5829 TM |
579 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL) { |
580 | if (sysfs_get_str(sra, NULL, "sync_action", buf, 20) <= 0) { | |
581 | ret = 1; | |
582 | goto free_info; | |
583 | } else if (strcmp(buf, "reshape\n") == 0) { | |
584 | pr_err("PPL cannot be enabled when reshape is in progress\n"); | |
585 | ret = 1; | |
586 | goto free_info; | |
587 | } | |
588 | } | |
589 | ||
860f11ed AP |
590 | if (subarray) { |
591 | char *update; | |
592 | ||
593 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL) | |
594 | update = "ppl"; | |
595 | else | |
596 | update = "no-ppl"; | |
597 | ||
598 | sprintf(container_dev, "/dev/%s", st->container_devnm); | |
599 | ||
600 | ret = Update_subarray(container_dev, subarray, update, NULL, | |
601 | c->verbose); | |
602 | if (ret) | |
603 | goto free_info; | |
604 | } | |
605 | ||
606 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL) { | |
607 | struct mdinfo info; | |
608 | ||
609 | if (subarray) { | |
610 | struct mdinfo *mdi; | |
611 | int cfd; | |
612 | ||
613 | cfd = open(container_dev, O_RDWR|O_EXCL); | |
614 | if (cfd < 0) { | |
615 | pr_err("Failed to open %s\n", container_dev); | |
616 | ret = 1; | |
617 | goto free_info; | |
618 | } | |
619 | ||
620 | ret = st->ss->load_container(st, cfd, st->container_devnm); | |
621 | close(cfd); | |
622 | ||
623 | if (ret) { | |
624 | pr_err("Cannot read superblock for %s\n", | |
625 | container_dev); | |
626 | goto free_info; | |
627 | } | |
628 | ||
629 | mdi = st->ss->container_content(st, subarray); | |
630 | info = *mdi; | |
631 | free(mdi); | |
632 | } | |
633 | ||
634 | for (sd = sra->devs; sd; sd = sd->next) { | |
635 | int dfd; | |
636 | char *devpath; | |
637 | ||
860f11ed AP |
638 | devpath = map_dev(sd->disk.major, sd->disk.minor, 0); |
639 | dfd = dev_open(devpath, O_RDWR); | |
640 | if (dfd < 0) { | |
641 | pr_err("Failed to open %s\n", devpath); | |
642 | ret = 1; | |
643 | goto free_info; | |
644 | } | |
645 | ||
646 | if (!subarray) { | |
647 | ret = st->ss->load_super(st, dfd, NULL); | |
648 | if (ret) { | |
649 | pr_err("Failed to load super-block.\n"); | |
650 | close(dfd); | |
651 | goto free_info; | |
652 | } | |
653 | ||
358ef9bf JS |
654 | ret = st->ss->update_super(st, sra, "ppl", |
655 | devname, | |
860f11ed AP |
656 | c->verbose, 0, NULL); |
657 | if (ret) { | |
658 | close(dfd); | |
659 | st->ss->free_super(st); | |
660 | goto free_info; | |
661 | } | |
662 | st->ss->getinfo_super(st, &info, NULL); | |
663 | } | |
664 | ||
358ef9bf JS |
665 | ret |= sysfs_set_num(sra, sd, "ppl_sector", |
666 | info.ppl_sector); | |
667 | ret |= sysfs_set_num(sra, sd, "ppl_size", | |
668 | info.ppl_size); | |
860f11ed AP |
669 | |
670 | if (ret) { | |
671 | pr_err("Failed to set PPL attributes for %s\n", | |
672 | sd->sys_name); | |
673 | close(dfd); | |
674 | st->ss->free_super(st); | |
675 | goto free_info; | |
676 | } | |
677 | ||
678 | ret = st->ss->write_init_ppl(st, &info, dfd); | |
679 | if (ret) | |
680 | pr_err("Failed to write PPL\n"); | |
681 | ||
682 | close(dfd); | |
683 | ||
684 | if (!subarray) | |
685 | st->ss->free_super(st); | |
686 | ||
687 | if (ret) | |
688 | goto free_info; | |
689 | } | |
690 | } | |
691 | ||
692 | ret = sysfs_set_str(sra, NULL, "consistency_policy", | |
693 | map_num(consistency_policies, | |
694 | s->consistency_policy)); | |
695 | if (ret) | |
696 | pr_err("Failed to change array consistency policy\n"); | |
697 | ||
698 | free_info: | |
699 | sysfs_free(sra); | |
700 | free_st: | |
701 | free(st); | |
702 | free(subarray); | |
703 | ||
704 | return ret; | |
705 | } | |
706 | ||
e86c9dd6 NB |
707 | /* |
708 | * When reshaping an array we might need to backup some data. | |
709 | * This is written to all spares with a 'super_block' describing it. | |
ff94fb86 | 710 | * The superblock goes 4K from the end of the used space on the |
e86c9dd6 NB |
711 | * device. |
712 | * It if written after the backup is complete. | |
713 | * It has the following structure. | |
714 | */ | |
715 | ||
5fdf37e3 | 716 | static struct mdp_backup_super { |
7236ee7a | 717 | char magic[16]; /* md_backup_data-1 or -2 */ |
e86c9dd6 NB |
718 | __u8 set_uuid[16]; |
719 | __u64 mtime; | |
720 | /* start/sizes in 512byte sectors */ | |
7236ee7a | 721 | __u64 devstart; /* address on backup device/file of data */ |
e86c9dd6 NB |
722 | __u64 arraystart; |
723 | __u64 length; | |
724 | __u32 sb_csum; /* csum of preceeding bytes. */ | |
7236ee7a N |
725 | __u32 pad1; |
726 | __u64 devstart2; /* offset in to data of second section */ | |
727 | __u64 arraystart2; | |
728 | __u64 length2; | |
729 | __u32 sb_csum2; /* csum of preceeding bytes. */ | |
730 | __u8 pad[512-68-32]; | |
5fdf37e3 | 731 | } __attribute__((aligned(512))) bsb, bsb2; |
e86c9dd6 | 732 | |
4411fb17 | 733 | static __u32 bsb_csum(char *buf, int len) |
e86c9dd6 NB |
734 | { |
735 | int i; | |
736 | int csum = 0; | |
ca3b6696 | 737 | for (i = 0; i < len; i++) |
e86c9dd6 NB |
738 | csum = (csum<<3) + buf[0]; |
739 | return __cpu_to_le32(csum); | |
740 | } | |
741 | ||
d7ca196c N |
742 | static int check_idle(struct supertype *st) |
743 | { | |
744 | /* Check that all member arrays for this container, or the | |
745 | * container of this array, are idle | |
746 | */ | |
4dd2df09 N |
747 | char *container = (st->container_devnm[0] |
748 | ? st->container_devnm : st->devnm); | |
d7ca196c N |
749 | struct mdstat_ent *ent, *e; |
750 | int is_idle = 1; | |
24daa16f | 751 | |
d7ca196c N |
752 | ent = mdstat_read(0, 0); |
753 | for (e = ent ; e; e = e->next) { | |
754 | if (!is_container_member(e, container)) | |
755 | continue; | |
756 | if (e->percent >= 0) { | |
757 | is_idle = 0; | |
758 | break; | |
759 | } | |
760 | } | |
761 | free_mdstat(ent); | |
762 | return is_idle; | |
763 | } | |
764 | ||
7f2ba464 | 765 | static int freeze_container(struct supertype *st) |
7236ee7a | 766 | { |
4dd2df09 N |
767 | char *container = (st->container_devnm[0] |
768 | ? st->container_devnm : st->devnm); | |
7f2ba464 | 769 | |
d7ca196c N |
770 | if (!check_idle(st)) |
771 | return -1; | |
24daa16f | 772 | |
7f2ba464 | 773 | if (block_monitor(container, 1)) { |
e7b84f9d | 774 | pr_err("failed to freeze container\n"); |
7f2ba464 DW |
775 | return -2; |
776 | } | |
777 | ||
778 | return 1; | |
779 | } | |
780 | ||
781 | static void unfreeze_container(struct supertype *st) | |
782 | { | |
4dd2df09 N |
783 | char *container = (st->container_devnm[0] |
784 | ? st->container_devnm : st->devnm); | |
7f2ba464 DW |
785 | |
786 | unblock_monitor(container, 1); | |
787 | } | |
788 | ||
789 | static int freeze(struct supertype *st) | |
790 | { | |
791 | /* Try to freeze resync/rebuild on this array/container. | |
7236ee7a | 792 | * Return -1 if the array is busy, |
7f2ba464 | 793 | * return -2 container cannot be frozen, |
7236ee7a N |
794 | * return 0 if this kernel doesn't support 'frozen' |
795 | * return 1 if it worked. | |
796 | */ | |
7f2ba464 DW |
797 | if (st->ss->external) |
798 | return freeze_container(st); | |
799 | else { | |
4dd2df09 | 800 | struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION); |
7f2ba464 | 801 | int err; |
815c8a7e | 802 | char buf[20]; |
7f2ba464 DW |
803 | |
804 | if (!sra) | |
805 | return -1; | |
815c8a7e N |
806 | /* Need to clear any 'read-auto' status */ |
807 | if (sysfs_get_str(sra, NULL, "array_state", buf, 20) > 0 && | |
808 | strncmp(buf, "read-auto", 9) == 0) | |
809 | sysfs_set_str(sra, NULL, "array_state", "clean"); | |
810 | ||
7f2ba464 DW |
811 | err = sysfs_freeze_array(sra); |
812 | sysfs_free(sra); | |
813 | return err; | |
814 | } | |
7236ee7a N |
815 | } |
816 | ||
9202b8eb | 817 | static void unfreeze(struct supertype *st) |
7236ee7a | 818 | { |
7f2ba464 DW |
819 | if (st->ss->external) |
820 | return unfreeze_container(st); | |
821 | else { | |
4dd2df09 | 822 | struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION); |
5e7be838 | 823 | char buf[20]; |
7f2ba464 | 824 | |
5e7be838 | 825 | if (sra && |
fc54fe7a JS |
826 | sysfs_get_str(sra, NULL, "sync_action", buf, 20) > 0 && |
827 | strcmp(buf, "frozen\n") == 0) | |
7f2ba464 | 828 | sysfs_set_str(sra, NULL, "sync_action", "idle"); |
7f2ba464 DW |
829 | sysfs_free(sra); |
830 | } | |
7236ee7a N |
831 | } |
832 | ||
4411fb17 | 833 | static void wait_reshape(struct mdinfo *sra) |
7236ee7a N |
834 | { |
835 | int fd = sysfs_get_fd(sra, NULL, "sync_action"); | |
836 | char action[20]; | |
837 | ||
92a19f1a AK |
838 | if (fd < 0) |
839 | return; | |
840 | ||
efc67e8e N |
841 | while (sysfs_fd_get_str(fd, action, 20) > 0 && |
842 | strncmp(action, "reshape", 7) == 0) | |
843 | sysfs_wait(fd, NULL); | |
92a19f1a | 844 | close(fd); |
7236ee7a | 845 | } |
7bc71196 | 846 | |
7ec0996c LD |
847 | static int reshape_super(struct supertype *st, unsigned long long size, |
848 | int level, int layout, int chunksize, int raid_disks, | |
41784c88 | 849 | int delta_disks, char *backup_file, char *dev, |
016e00f5 | 850 | int direction, int verbose) |
7bc71196 DW |
851 | { |
852 | /* nothing extra to check in the native case */ | |
853 | if (!st->ss->external) | |
854 | return 0; | |
358ef9bf | 855 | if (!st->ss->reshape_super || !st->ss->manage_reshape) { |
e7b84f9d | 856 | pr_err("%s metadata does not support reshape\n", |
7bc71196 DW |
857 | st->ss->name); |
858 | return 1; | |
859 | } | |
860 | ||
861 | return st->ss->reshape_super(st, size, level, layout, chunksize, | |
41784c88 | 862 | raid_disks, delta_disks, backup_file, dev, |
016e00f5 | 863 | direction, verbose); |
7bc71196 DW |
864 | } |
865 | ||
866 | static void sync_metadata(struct supertype *st) | |
867 | { | |
868 | if (st->ss->external) { | |
76266030 | 869 | if (st->update_tail) { |
7bc71196 | 870 | flush_metadata_updates(st); |
76266030 N |
871 | st->update_tail = &st->updates; |
872 | } else | |
7bc71196 DW |
873 | st->ss->sync_metadata(st); |
874 | } | |
875 | } | |
876 | ||
877 | static int subarray_set_num(char *container, struct mdinfo *sra, char *name, int n) | |
878 | { | |
879 | /* when dealing with external metadata subarrays we need to be | |
880 | * prepared to handle EAGAIN. The kernel may need to wait for | |
881 | * mdmon to mark the array active so the kernel can handle | |
882 | * allocations/writeback when preparing the reshape action | |
883 | * (md_allow_write()). We temporarily disable safe_mode_delay | |
884 | * to close a race with the array_state going clean before the | |
885 | * next write to raid_disks / stripe_cache_size | |
886 | */ | |
887 | char safe[50]; | |
888 | int rc; | |
889 | ||
890 | /* only 'raid_disks' and 'stripe_cache_size' trigger md_allow_write */ | |
5da9ab98 N |
891 | if (!container || |
892 | (strcmp(name, "raid_disks") != 0 && | |
893 | strcmp(name, "stripe_cache_size") != 0)) | |
7bc71196 DW |
894 | return sysfs_set_num(sra, NULL, name, n); |
895 | ||
896 | rc = sysfs_get_str(sra, NULL, "safe_mode_delay", safe, sizeof(safe)); | |
897 | if (rc <= 0) | |
898 | return -1; | |
899 | sysfs_set_num(sra, NULL, "safe_mode_delay", 0); | |
900 | rc = sysfs_set_num(sra, NULL, name, n); | |
901 | if (rc < 0 && errno == EAGAIN) { | |
902 | ping_monitor(container); | |
903 | /* if we get EAGAIN here then the monitor is not active | |
904 | * so stop trying | |
905 | */ | |
906 | rc = sysfs_set_num(sra, NULL, name, n); | |
907 | } | |
908 | sysfs_set_str(sra, NULL, "safe_mode_delay", safe); | |
909 | return rc; | |
910 | } | |
911 | ||
27a1e5b5 N |
912 | int start_reshape(struct mdinfo *sra, int already_running, |
913 | int before_data_disks, int data_disks) | |
47eb4d5a N |
914 | { |
915 | int err; | |
6937e6d2 AK |
916 | unsigned long long sync_max_to_set; |
917 | ||
0f28668b | 918 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); |
6937e6d2 AK |
919 | err = sysfs_set_num(sra, NULL, "suspend_hi", sra->reshape_progress); |
920 | err = err ?: sysfs_set_num(sra, NULL, "suspend_lo", | |
921 | sra->reshape_progress); | |
27a1e5b5 N |
922 | if (before_data_disks <= data_disks) |
923 | sync_max_to_set = sra->reshape_progress / data_disks; | |
924 | else | |
925 | sync_max_to_set = (sra->component_size * data_disks | |
926 | - sra->reshape_progress) / data_disks; | |
1e971e71 | 927 | if (!already_running) |
6937e6d2 AK |
928 | sysfs_set_num(sra, NULL, "sync_min", sync_max_to_set); |
929 | err = err ?: sysfs_set_num(sra, NULL, "sync_max", sync_max_to_set); | |
ada38ebb N |
930 | if (!already_running && err == 0) { |
931 | int cnt = 5; | |
932 | do { | |
358ef9bf JS |
933 | err = sysfs_set_str(sra, NULL, "sync_action", |
934 | "reshape"); | |
ada38ebb N |
935 | if (err) |
936 | sleep(1); | |
937 | } while (err && errno == EBUSY && cnt-- > 0); | |
938 | } | |
47eb4d5a N |
939 | return err; |
940 | } | |
941 | ||
942 | void abort_reshape(struct mdinfo *sra) | |
943 | { | |
944 | sysfs_set_str(sra, NULL, "sync_action", "idle"); | |
bf08f6b1 JS |
945 | /* |
946 | * Prior to kernel commit: 23ddff3792f6 ("md: allow suspend_lo and | |
947 | * suspend_hi to decrease as well as increase.") | |
948 | * you could only increase suspend_{lo,hi} unless the region they | |
949 | * covered was empty. So to reset to 0, you need to push suspend_lo | |
950 | * up past suspend_hi first. So to maximize the chance of mdadm | |
951 | * working on all kernels, we want to keep doing that. | |
952 | */ | |
47eb4d5a N |
953 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); |
954 | sysfs_set_num(sra, NULL, "suspend_hi", 0); | |
955 | sysfs_set_num(sra, NULL, "suspend_lo", 0); | |
956 | sysfs_set_num(sra, NULL, "sync_min", 0); | |
84d11e6c N |
957 | // It isn't safe to reset sync_max as we aren't monitoring. |
958 | // Array really should be stopped at this point. | |
47eb4d5a N |
959 | } |
960 | ||
dfe77a9e KW |
961 | int remove_disks_for_takeover(struct supertype *st, |
962 | struct mdinfo *sra, | |
963 | int layout) | |
62a48395 AK |
964 | { |
965 | int nr_of_copies; | |
966 | struct mdinfo *remaining; | |
967 | int slot; | |
968 | ||
ddab63c7 MD |
969 | if (st->ss->external) { |
970 | int rv = 0; | |
971 | struct mdinfo *arrays = st->ss->container_content(st, NULL); | |
972 | /* | |
973 | * containter_content returns list of arrays in container | |
974 | * If arrays->next is not NULL it means that there are | |
975 | * 2 arrays in container and operation should be blocked | |
976 | */ | |
977 | if (arrays) { | |
978 | if (arrays->next) | |
979 | rv = 1; | |
980 | sysfs_free(arrays); | |
981 | if (rv) { | |
982 | pr_err("Error. Cannot perform operation on /dev/%s\n", st->devnm); | |
983 | pr_err("For this operation it MUST be single array in container\n"); | |
984 | return rv; | |
985 | } | |
986 | } | |
987 | } | |
988 | ||
dfe77a9e KW |
989 | if (sra->array.level == 10) |
990 | nr_of_copies = layout & 0xff; | |
991 | else if (sra->array.level == 1) | |
992 | nr_of_copies = sra->array.raid_disks; | |
993 | else | |
994 | return 1; | |
62a48395 AK |
995 | |
996 | remaining = sra->devs; | |
997 | sra->devs = NULL; | |
998 | /* for each 'copy', select one device and remove from the list. */ | |
999 | for (slot = 0; slot < sra->array.raid_disks; slot += nr_of_copies) { | |
1000 | struct mdinfo **diskp; | |
1001 | int found = 0; | |
1002 | ||
1003 | /* Find a working device to keep */ | |
1004 | for (diskp = &remaining; *diskp ; diskp = &(*diskp)->next) { | |
1005 | struct mdinfo *disk = *diskp; | |
1006 | ||
1007 | if (disk->disk.raid_disk < slot) | |
1008 | continue; | |
1009 | if (disk->disk.raid_disk >= slot + nr_of_copies) | |
1010 | continue; | |
1011 | if (disk->disk.state & (1<<MD_DISK_REMOVED)) | |
1012 | continue; | |
1013 | if (disk->disk.state & (1<<MD_DISK_FAULTY)) | |
1014 | continue; | |
1015 | if (!(disk->disk.state & (1<<MD_DISK_SYNC))) | |
1016 | continue; | |
1017 | ||
1018 | /* We have found a good disk to use! */ | |
1019 | *diskp = disk->next; | |
1020 | disk->next = sra->devs; | |
1021 | sra->devs = disk; | |
1022 | found = 1; | |
1023 | break; | |
1024 | } | |
1025 | if (!found) | |
1026 | break; | |
1027 | } | |
1028 | ||
1029 | if (slot < sra->array.raid_disks) { | |
1030 | /* didn't find all slots */ | |
1031 | struct mdinfo **e; | |
1032 | e = &remaining; | |
1033 | while (*e) | |
1034 | e = &(*e)->next; | |
1035 | *e = sra->devs; | |
1036 | sra->devs = remaining; | |
1037 | return 1; | |
1038 | } | |
1039 | ||
1040 | /* Remove all 'remaining' devices from the array */ | |
1041 | while (remaining) { | |
1042 | struct mdinfo *sd = remaining; | |
1043 | remaining = sd->next; | |
1044 | ||
1045 | sysfs_set_str(sra, sd, "state", "faulty"); | |
1046 | sysfs_set_str(sra, sd, "slot", "none"); | |
d5ca4a23 KW |
1047 | /* for external metadata disks should be removed in mdmon */ |
1048 | if (!st->ss->external) | |
1049 | sysfs_set_str(sra, sd, "state", "remove"); | |
62a48395 AK |
1050 | sd->disk.state |= (1<<MD_DISK_REMOVED); |
1051 | sd->disk.state &= ~(1<<MD_DISK_SYNC); | |
1052 | sd->next = sra->devs; | |
1053 | sra->devs = sd; | |
1054 | } | |
1055 | return 0; | |
1056 | } | |
1057 | ||
130994cb AK |
1058 | void reshape_free_fdlist(int *fdlist, |
1059 | unsigned long long *offsets, | |
1060 | int size) | |
1061 | { | |
1062 | int i; | |
1063 | ||
1064 | for (i = 0; i < size; i++) | |
1065 | if (fdlist[i] >= 0) | |
1066 | close(fdlist[i]); | |
1067 | ||
1068 | free(fdlist); | |
1069 | free(offsets); | |
1070 | } | |
1071 | ||
1072 | int reshape_prepare_fdlist(char *devname, | |
1073 | struct mdinfo *sra, | |
1074 | int raid_disks, | |
1075 | int nrdisks, | |
1076 | unsigned long blocks, | |
1077 | char *backup_file, | |
1078 | int *fdlist, | |
1079 | unsigned long long *offsets) | |
1080 | { | |
1081 | int d = 0; | |
1082 | struct mdinfo *sd; | |
1083 | ||
a7dec3fd | 1084 | enable_fds(nrdisks); |
130994cb AK |
1085 | for (d = 0; d <= nrdisks; d++) |
1086 | fdlist[d] = -1; | |
1087 | d = raid_disks; | |
1088 | for (sd = sra->devs; sd; sd = sd->next) { | |
1089 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
1090 | continue; | |
8e7ddc5f N |
1091 | if (sd->disk.state & (1<<MD_DISK_SYNC) && |
1092 | sd->disk.raid_disk < raid_disks) { | |
358ef9bf JS |
1093 | char *dn = map_dev(sd->disk.major, sd->disk.minor, 1); |
1094 | fdlist[sd->disk.raid_disk] = dev_open(dn, O_RDONLY); | |
130994cb AK |
1095 | offsets[sd->disk.raid_disk] = sd->data_offset*512; |
1096 | if (fdlist[sd->disk.raid_disk] < 0) { | |
e7b84f9d N |
1097 | pr_err("%s: cannot open component %s\n", |
1098 | devname, dn ? dn : "-unknown-"); | |
130994cb AK |
1099 | d = -1; |
1100 | goto release; | |
1101 | } | |
1102 | } else if (backup_file == NULL) { | |
1103 | /* spare */ | |
358ef9bf | 1104 | char *dn = map_dev(sd->disk.major, sd->disk.minor, 1); |
130994cb AK |
1105 | fdlist[d] = dev_open(dn, O_RDWR); |
1106 | offsets[d] = (sd->data_offset + sra->component_size - blocks - 8)*512; | |
1107 | if (fdlist[d] < 0) { | |
e7b84f9d | 1108 | pr_err("%s: cannot open component %s\n", |
130994cb AK |
1109 | devname, dn ? dn : "-unknown-"); |
1110 | d = -1; | |
1111 | goto release; | |
1112 | } | |
1113 | d++; | |
1114 | } | |
1115 | } | |
1116 | release: | |
1117 | return d; | |
1118 | } | |
1119 | ||
e6e9d47b AK |
1120 | int reshape_open_backup_file(char *backup_file, |
1121 | int fd, | |
1122 | char *devname, | |
1123 | long blocks, | |
1124 | int *fdlist, | |
a93f87ee | 1125 | unsigned long long *offsets, |
54ded86f | 1126 | char *sys_name, |
a93f87ee | 1127 | int restart) |
e6e9d47b AK |
1128 | { |
1129 | /* Return 1 on success, 0 on any form of failure */ | |
1130 | /* need to check backup file is large enough */ | |
1131 | char buf[512]; | |
1132 | struct stat stb; | |
1133 | unsigned int dev; | |
1134 | int i; | |
1135 | ||
a93f87ee | 1136 | *fdlist = open(backup_file, O_RDWR|O_CREAT|(restart ? O_TRUNC : O_EXCL), |
e6e9d47b AK |
1137 | S_IRUSR | S_IWUSR); |
1138 | *offsets = 8 * 512; | |
1139 | if (*fdlist < 0) { | |
e7b84f9d | 1140 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
1141 | devname, backup_file, strerror(errno)); |
1142 | return 0; | |
1143 | } | |
1144 | /* Guard against backup file being on array device. | |
1145 | * If array is partitioned or if LVM etc is in the | |
1146 | * way this will not notice, but it is better than | |
1147 | * nothing. | |
1148 | */ | |
1149 | fstat(*fdlist, &stb); | |
1150 | dev = stb.st_dev; | |
1151 | fstat(fd, &stb); | |
1152 | if (stb.st_rdev == dev) { | |
7a862a02 | 1153 | pr_err("backup file must NOT be on the array being reshaped.\n"); |
e6e9d47b AK |
1154 | close(*fdlist); |
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | memset(buf, 0, 512); | |
ca4fe0bf | 1159 | for (i=0; i < blocks + 8 ; i++) { |
e6e9d47b | 1160 | if (write(*fdlist, buf, 512) != 512) { |
7a862a02 | 1161 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
1162 | devname, backup_file, strerror(errno)); |
1163 | return 0; | |
1164 | } | |
1165 | } | |
1166 | if (fsync(*fdlist) != 0) { | |
e7b84f9d | 1167 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
1168 | devname, backup_file, strerror(errno)); |
1169 | return 0; | |
1170 | } | |
1171 | ||
54ded86f N |
1172 | if (!restart && strncmp(backup_file, MAP_DIR, strlen(MAP_DIR)) != 0) { |
1173 | char *bu = make_backup(sys_name); | |
1e60caeb | 1174 | if (symlink(backup_file, bu)) |
a5a6a7d9 | 1175 | pr_err("Recording backup file in " MAP_DIR " failed: %s\n", |
1e60caeb | 1176 | strerror(errno)); |
54ded86f N |
1177 | free(bu); |
1178 | } | |
1179 | ||
e6e9d47b AK |
1180 | return 1; |
1181 | } | |
1182 | ||
1c009fc2 AK |
1183 | unsigned long compute_backup_blocks(int nchunk, int ochunk, |
1184 | unsigned int ndata, unsigned int odata) | |
1185 | { | |
1186 | unsigned long a, b, blocks; | |
1187 | /* So how much do we need to backup. | |
1188 | * We need an amount of data which is both a whole number of | |
1189 | * old stripes and a whole number of new stripes. | |
1190 | * So LCM for (chunksize*datadisks). | |
1191 | */ | |
1192 | a = (ochunk/512) * odata; | |
1193 | b = (nchunk/512) * ndata; | |
1194 | /* Find GCD */ | |
b48e2e25 | 1195 | a = GCD(a, b); |
1c009fc2 AK |
1196 | /* LCM == product / GCD */ |
1197 | blocks = (ochunk/512) * (nchunk/512) * odata * ndata / a; | |
1198 | ||
1199 | return blocks; | |
1200 | } | |
1201 | ||
a73b0081 | 1202 | char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re) |
5da9ab98 N |
1203 | { |
1204 | /* Based on the current array state in info->array and | |
1205 | * the changes in info->new_* etc, determine: | |
1206 | * - whether the change is possible | |
1207 | * - Intermediate level/raid_disks/layout | |
1208 | * - whether a restriping reshape is needed | |
1209 | * - number of sectors in minimum change unit. This | |
1210 | * will cover a whole number of stripes in 'before' and | |
1211 | * 'after'. | |
1212 | * | |
1213 | * Return message if the change should be rejected | |
1214 | * NULL if the change can be achieved | |
1215 | * | |
1216 | * This can be called as part of starting a reshape, or | |
1217 | * when assembling an array that is undergoing reshape. | |
1218 | */ | |
19ceb16d | 1219 | int near, far, offset, copies; |
5da9ab98 | 1220 | int new_disks; |
19ceb16d | 1221 | int old_chunk, new_chunk; |
b545e14a N |
1222 | /* delta_parity records change in number of devices |
1223 | * caused by level change | |
1224 | */ | |
1225 | int delta_parity = 0; | |
5da9ab98 | 1226 | |
6b2fc3c1 N |
1227 | memset(re, 0, sizeof(*re)); |
1228 | ||
5da9ab98 N |
1229 | /* If a new level not explicitly given, we assume no-change */ |
1230 | if (info->new_level == UnSet) | |
1231 | info->new_level = info->array.level; | |
1232 | ||
1233 | if (info->new_chunk) | |
1234 | switch (info->new_level) { | |
1235 | case 0: | |
1236 | case 4: | |
1237 | case 5: | |
1238 | case 6: | |
1239 | case 10: | |
1240 | /* chunk size is meaningful, must divide component_size | |
1241 | * evenly | |
1242 | */ | |
a73b0081 N |
1243 | if (info->component_size % (info->new_chunk/512)) { |
1244 | unsigned long long shrink = info->component_size; | |
1245 | shrink &= ~(unsigned long long)(info->new_chunk/512-1); | |
1246 | pr_err("New chunk size (%dK) does not evenly divide device size (%lluk)\n", | |
1247 | info->new_chunk/1024, info->component_size/2); | |
1248 | pr_err("After shrinking any filesystem, \"mdadm --grow %s --size %llu\"\n", | |
1249 | devname, shrink/2); | |
1250 | pr_err("will shrink the array so the given chunk size would work.\n"); | |
1251 | return ""; | |
1252 | } | |
5da9ab98 N |
1253 | break; |
1254 | default: | |
1255 | return "chunk size not meaningful for this level"; | |
1256 | } | |
1257 | else | |
1258 | info->new_chunk = info->array.chunk_size; | |
1259 | ||
1260 | switch (info->array.level) { | |
90b60dfa | 1261 | default: |
46643e1a N |
1262 | return "No reshape is possibly for this RAID level"; |
1263 | case LEVEL_LINEAR: | |
1264 | if (info->delta_disks != UnSet) | |
1265 | return "Only --add is supported for LINEAR, setting --raid-disks is not needed"; | |
1266 | else | |
1267 | return "Only --add is supported for LINEAR, other --grow options are not meaningful"; | |
5da9ab98 N |
1268 | case 1: |
1269 | /* RAID1 can convert to RAID1 with different disks, or | |
dfe77a9e KW |
1270 | * raid5 with 2 disks, or |
1271 | * raid0 with 1 disk | |
5da9ab98 | 1272 | */ |
6ebf34e6 | 1273 | if (info->new_level > 1 && (info->component_size & 7)) |
7a862a02 | 1274 | return "Cannot convert RAID1 of this size - reduce size to multiple of 4K first."; |
dfe77a9e | 1275 | if (info->new_level == 0) { |
b545e14a N |
1276 | if (info->delta_disks != UnSet && |
1277 | info->delta_disks != 0) | |
7a862a02 | 1278 | return "Cannot change number of disks with RAID1->RAID0 conversion"; |
dfe77a9e KW |
1279 | re->level = 0; |
1280 | re->before.data_disks = 1; | |
1281 | re->after.data_disks = 1; | |
dfe77a9e KW |
1282 | return NULL; |
1283 | } | |
5da9ab98 N |
1284 | if (info->new_level == 1) { |
1285 | if (info->delta_disks == UnSet) | |
1286 | /* Don't know what to do */ | |
1287 | return "no change requested for Growing RAID1"; | |
1288 | re->level = 1; | |
5da9ab98 N |
1289 | return NULL; |
1290 | } | |
6ebf34e6 | 1291 | if (info->array.raid_disks != 2 && info->new_level == 5) |
a58e0da4 | 1292 | return "Can only convert a 2-device array to RAID5"; |
6ebf34e6 | 1293 | if (info->array.raid_disks == 2 && info->new_level == 5) { |
5da9ab98 | 1294 | re->level = 5; |
5da9ab98 | 1295 | re->before.data_disks = 1; |
5652f2d9 N |
1296 | if (info->delta_disks != UnSet && |
1297 | info->delta_disks != 0) | |
1298 | re->after.data_disks = 1 + info->delta_disks; | |
1299 | else | |
1300 | re->after.data_disks = 1; | |
1301 | if (re->after.data_disks < 1) | |
1302 | return "Number of disks too small for RAID5"; | |
1303 | ||
5da9ab98 | 1304 | re->before.layout = ALGORITHM_LEFT_SYMMETRIC; |
446d2a5a N |
1305 | info->array.chunk_size = 65536; |
1306 | break; | |
5da9ab98 N |
1307 | } |
1308 | /* Could do some multi-stage conversions, but leave that to | |
1309 | * later. | |
1310 | */ | |
1311 | return "Impossibly level change request for RAID1"; | |
1312 | ||
1313 | case 10: | |
19ceb16d N |
1314 | /* RAID10 can be converted from near mode to |
1315 | * RAID0 by removing some devices. | |
1316 | * It can also be reshaped if the kernel supports | |
1317 | * new_data_offset. | |
5da9ab98 | 1318 | */ |
19ceb16d N |
1319 | switch (info->new_level) { |
1320 | case 0: | |
1321 | if ((info->array.layout & ~0xff) != 0x100) | |
1322 | return "Cannot Grow RAID10 with far/offset layout"; | |
358ef9bf JS |
1323 | /* |
1324 | * number of devices must be multiple of | |
1325 | * number of copies | |
1326 | */ | |
1327 | if (info->array.raid_disks % | |
1328 | (info->array.layout & 0xff)) | |
19ceb16d N |
1329 | return "RAID10 layout too complex for Grow operation"; |
1330 | ||
358ef9bf JS |
1331 | new_disks = (info->array.raid_disks / |
1332 | (info->array.layout & 0xff)); | |
19ceb16d N |
1333 | if (info->delta_disks == UnSet) |
1334 | info->delta_disks = (new_disks | |
1335 | - info->array.raid_disks); | |
5da9ab98 | 1336 | |
358ef9bf JS |
1337 | if (info->delta_disks != |
1338 | new_disks - info->array.raid_disks) | |
19ceb16d N |
1339 | return "New number of raid-devices impossible for RAID10"; |
1340 | if (info->new_chunk && | |
1341 | info->new_chunk != info->array.chunk_size) | |
1342 | return "Cannot change chunk-size with RAID10 Grow"; | |
1343 | ||
1344 | /* looks good */ | |
1345 | re->level = 0; | |
19ceb16d N |
1346 | re->before.data_disks = new_disks; |
1347 | re->after.data_disks = re->before.data_disks; | |
19ceb16d N |
1348 | return NULL; |
1349 | ||
1350 | case 10: | |
1351 | near = info->array.layout & 0xff; | |
1352 | far = (info->array.layout >> 8) & 0xff; | |
1353 | offset = info->array.layout & 0x10000; | |
1354 | if (far > 1 && !offset) | |
1355 | return "Cannot reshape RAID10 in far-mode"; | |
1356 | copies = near * far; | |
1357 | ||
1358 | old_chunk = info->array.chunk_size * far; | |
1359 | ||
1360 | if (info->new_layout == UnSet) | |
1361 | info->new_layout = info->array.layout; | |
1362 | else { | |
1363 | near = info->new_layout & 0xff; | |
1364 | far = (info->new_layout >> 8) & 0xff; | |
1365 | offset = info->new_layout & 0x10000; | |
1366 | if (far > 1 && !offset) | |
1367 | return "Cannot reshape RAID10 to far-mode"; | |
1368 | if (near * far != copies) | |
7a862a02 | 1369 | return "Cannot change number of copies when reshaping RAID10"; |
19ceb16d N |
1370 | } |
1371 | if (info->delta_disks == UnSet) | |
1372 | info->delta_disks = 0; | |
1373 | new_disks = (info->array.raid_disks + | |
1374 | info->delta_disks); | |
1375 | ||
1376 | new_chunk = info->new_chunk * far; | |
1377 | ||
1378 | re->level = 10; | |
19ceb16d N |
1379 | re->before.layout = info->array.layout; |
1380 | re->before.data_disks = info->array.raid_disks; | |
1381 | re->after.layout = info->new_layout; | |
1382 | re->after.data_disks = new_disks; | |
89ecd3cf N |
1383 | /* For RAID10 we don't do backup but do allow reshape, |
1384 | * so set backup_blocks to INVALID_SECTORS rather than | |
1385 | * zero. | |
1386 | * And there is no need to synchronise stripes on both | |
19ceb16d N |
1387 | * 'old' and 'new'. So the important |
1388 | * number is the minimum data_offset difference | |
1389 | * which is the larger of (offset copies * chunk). | |
1390 | */ | |
89ecd3cf N |
1391 | re->backup_blocks = INVALID_SECTORS; |
1392 | re->min_offset_change = max(old_chunk, new_chunk) / 512; | |
ee2429e0 | 1393 | if (new_disks < re->before.data_disks && |
89ecd3cf | 1394 | info->space_after < re->min_offset_change) |
ee2429e0 N |
1395 | /* Reduce component size by one chunk */ |
1396 | re->new_size = (info->component_size - | |
89ecd3cf | 1397 | re->min_offset_change); |
ee2429e0 N |
1398 | else |
1399 | re->new_size = info->component_size; | |
1400 | re->new_size = re->new_size * new_disks / copies; | |
19ceb16d | 1401 | return NULL; |
5da9ab98 | 1402 | |
19ceb16d N |
1403 | default: |
1404 | return "RAID10 can only be changed to RAID0"; | |
1405 | } | |
5da9ab98 N |
1406 | case 0: |
1407 | /* RAID0 can be converted to RAID10, or to RAID456 */ | |
1408 | if (info->new_level == 10) { | |
6ebf34e6 JS |
1409 | if (info->new_layout == UnSet && |
1410 | info->delta_disks == UnSet) { | |
5da9ab98 N |
1411 | /* Assume near=2 layout */ |
1412 | info->new_layout = 0x102; | |
1413 | info->delta_disks = info->array.raid_disks; | |
1414 | } | |
1415 | if (info->new_layout == UnSet) { | |
1416 | int copies = 1 + (info->delta_disks | |
1417 | / info->array.raid_disks); | |
d16a7494 JS |
1418 | if (info->array.raid_disks * (copies-1) != |
1419 | info->delta_disks) | |
7a862a02 | 1420 | return "Impossible number of devices for RAID0->RAID10"; |
5da9ab98 N |
1421 | info->new_layout = 0x100 + copies; |
1422 | } | |
1423 | if (info->delta_disks == UnSet) { | |
1424 | int copies = info->new_layout & 0xff; | |
1425 | if (info->new_layout != 0x100 + copies) | |
7a862a02 | 1426 | return "New layout impossible for RAID0->RAID10";; |
5da9ab98 N |
1427 | info->delta_disks = (copies - 1) * |
1428 | info->array.raid_disks; | |
1429 | } | |
1430 | if (info->new_chunk && | |
1431 | info->new_chunk != info->array.chunk_size) | |
1432 | return "Cannot change chunk-size with RAID0->RAID10"; | |
1433 | /* looks good */ | |
1434 | re->level = 10; | |
5da9ab98 N |
1435 | re->before.data_disks = (info->array.raid_disks + |
1436 | info->delta_disks); | |
031d445c | 1437 | re->after.data_disks = re->before.data_disks; |
5da9ab98 | 1438 | re->before.layout = info->new_layout; |
5da9ab98 N |
1439 | return NULL; |
1440 | } | |
1441 | ||
1442 | /* RAID0 can also covert to RAID0/4/5/6 by first converting to | |
1443 | * a raid4 style layout of the final level. | |
1444 | */ | |
1445 | switch (info->new_level) { | |
5da9ab98 | 1446 | case 4: |
b545e14a N |
1447 | delta_parity = 1; |
1448 | case 0: | |
5da9ab98 N |
1449 | re->level = 4; |
1450 | re->before.layout = 0; | |
1451 | break; | |
1452 | case 5: | |
b545e14a | 1453 | delta_parity = 1; |
5da9ab98 N |
1454 | re->level = 5; |
1455 | re->before.layout = ALGORITHM_PARITY_N; | |
e5ba75ce N |
1456 | if (info->new_layout == UnSet) |
1457 | info->new_layout = map_name(r5layout, "default"); | |
5da9ab98 N |
1458 | break; |
1459 | case 6: | |
b545e14a | 1460 | delta_parity = 2; |
5da9ab98 N |
1461 | re->level = 6; |
1462 | re->before.layout = ALGORITHM_PARITY_N; | |
e5ba75ce N |
1463 | if (info->new_layout == UnSet) |
1464 | info->new_layout = map_name(r6layout, "default"); | |
5da9ab98 N |
1465 | break; |
1466 | default: | |
1467 | return "Impossible level change requested"; | |
1468 | } | |
1469 | re->before.data_disks = info->array.raid_disks; | |
1470 | /* determining 'after' layout happens outside this 'switch' */ | |
1471 | break; | |
1472 | ||
1473 | case 4: | |
1474 | info->array.layout = ALGORITHM_PARITY_N; | |
1475 | case 5: | |
1476 | switch (info->new_level) { | |
f0cce442 | 1477 | case 0: |
b545e14a | 1478 | delta_parity = -1; |
5da9ab98 N |
1479 | case 4: |
1480 | re->level = info->array.level; | |
1481 | re->before.data_disks = info->array.raid_disks - 1; | |
1482 | re->before.layout = info->array.layout; | |
1483 | break; | |
1484 | case 5: | |
1485 | re->level = 5; | |
1486 | re->before.data_disks = info->array.raid_disks - 1; | |
1487 | re->before.layout = info->array.layout; | |
1488 | break; | |
1489 | case 6: | |
b545e14a | 1490 | delta_parity = 1; |
5da9ab98 N |
1491 | re->level = 6; |
1492 | re->before.data_disks = info->array.raid_disks - 1; | |
1493 | switch (info->array.layout) { | |
1494 | case ALGORITHM_LEFT_ASYMMETRIC: | |
1495 | re->before.layout = ALGORITHM_LEFT_ASYMMETRIC_6; | |
1496 | break; | |
1497 | case ALGORITHM_RIGHT_ASYMMETRIC: | |
1498 | re->before.layout = ALGORITHM_RIGHT_ASYMMETRIC_6; | |
1499 | break; | |
1500 | case ALGORITHM_LEFT_SYMMETRIC: | |
1501 | re->before.layout = ALGORITHM_LEFT_SYMMETRIC_6; | |
1502 | break; | |
1503 | case ALGORITHM_RIGHT_SYMMETRIC: | |
1504 | re->before.layout = ALGORITHM_RIGHT_SYMMETRIC_6; | |
1505 | break; | |
1506 | case ALGORITHM_PARITY_0: | |
1507 | re->before.layout = ALGORITHM_PARITY_0_6; | |
1508 | break; | |
1509 | case ALGORITHM_PARITY_N: | |
1510 | re->before.layout = ALGORITHM_PARITY_N_6; | |
1511 | break; | |
1512 | default: | |
1513 | return "Cannot convert an array with this layout"; | |
1514 | } | |
1515 | break; | |
1516 | case 1: | |
1517 | if (info->array.raid_disks != 2) | |
1518 | return "Can only convert a 2-device array to RAID1"; | |
b545e14a N |
1519 | if (info->delta_disks != UnSet && |
1520 | info->delta_disks != 0) | |
7a862a02 | 1521 | return "Cannot set raid_disk when converting RAID5->RAID1"; |
5da9ab98 | 1522 | re->level = 1; |
6a67848a N |
1523 | info->new_chunk = 0; |
1524 | return NULL; | |
5da9ab98 N |
1525 | default: |
1526 | return "Impossible level change requested"; | |
1527 | } | |
1528 | break; | |
1529 | case 6: | |
1530 | switch (info->new_level) { | |
1531 | case 4: | |
1532 | case 5: | |
b545e14a | 1533 | delta_parity = -1; |
5da9ab98 N |
1534 | case 6: |
1535 | re->level = 6; | |
1536 | re->before.data_disks = info->array.raid_disks - 2; | |
1537 | re->before.layout = info->array.layout; | |
1538 | break; | |
1539 | default: | |
1540 | return "Impossible level change requested"; | |
1541 | } | |
1542 | break; | |
1543 | } | |
1544 | ||
1545 | /* If we reached here then it looks like a re-stripe is | |
1546 | * happening. We have determined the intermediate level | |
1547 | * and initial raid_disks/layout and stored these in 're'. | |
1548 | * | |
1549 | * We need to deduce the final layout that can be atomically | |
1550 | * converted to the end state. | |
1551 | */ | |
1552 | switch (info->new_level) { | |
1553 | case 0: | |
1554 | /* We can only get to RAID0 from RAID4 or RAID5 | |
1555 | * with appropriate layout and one extra device | |
1556 | */ | |
1557 | if (re->level != 4 && re->level != 5) | |
1558 | return "Cannot covert to RAID0 from this level"; | |
b545e14a | 1559 | |
5da9ab98 N |
1560 | switch (re->level) { |
1561 | case 4: | |
e339dba2 | 1562 | re->before.layout = 0; |
ca3b6696 N |
1563 | re->after.layout = 0; |
1564 | break; | |
5da9ab98 | 1565 | case 5: |
ca3b6696 N |
1566 | re->after.layout = ALGORITHM_PARITY_N; |
1567 | break; | |
5da9ab98 N |
1568 | } |
1569 | break; | |
1570 | ||
1571 | case 4: | |
1572 | /* We can only get to RAID4 from RAID5 */ | |
1573 | if (re->level != 4 && re->level != 5) | |
1574 | return "Cannot convert to RAID4 from this level"; | |
b545e14a | 1575 | |
5da9ab98 N |
1576 | switch (re->level) { |
1577 | case 4: | |
ca3b6696 N |
1578 | re->after.layout = 0; |
1579 | break; | |
5da9ab98 | 1580 | case 5: |
ca3b6696 N |
1581 | re->after.layout = ALGORITHM_PARITY_N; |
1582 | break; | |
5da9ab98 N |
1583 | } |
1584 | break; | |
1585 | ||
1586 | case 5: | |
0073a6e1 | 1587 | /* We get to RAID5 from RAID5 or RAID6 */ |
5da9ab98 N |
1588 | if (re->level != 5 && re->level != 6) |
1589 | return "Cannot convert to RAID5 from this level"; | |
b545e14a | 1590 | |
5da9ab98 N |
1591 | switch (re->level) { |
1592 | case 5: | |
1593 | if (info->new_layout == UnSet) | |
1594 | re->after.layout = re->before.layout; | |
1595 | else | |
1596 | re->after.layout = info->new_layout; | |
1597 | break; | |
1598 | case 6: | |
4a870364 N |
1599 | if (info->new_layout == UnSet) |
1600 | info->new_layout = re->before.layout; | |
1601 | ||
5da9ab98 N |
1602 | /* after.layout needs to be raid6 version of new_layout */ |
1603 | if (info->new_layout == ALGORITHM_PARITY_N) | |
1604 | re->after.layout = ALGORITHM_PARITY_N; | |
1605 | else { | |
1606 | char layout[40]; | |
1607 | char *ls = map_num(r5layout, info->new_layout); | |
1608 | int l; | |
0073a6e1 N |
1609 | if (ls) { |
1610 | /* Current RAID6 layout has a RAID5 | |
1611 | * equivalent - good | |
1612 | */ | |
1613 | strcat(strcpy(layout, ls), "-6"); | |
1614 | l = map_name(r6layout, layout); | |
1615 | if (l == UnSet) | |
7a862a02 | 1616 | return "Cannot find RAID6 layout to convert to"; |
0073a6e1 N |
1617 | } else { |
1618 | /* Current RAID6 has no equivalent. | |
1619 | * If it is already a '-6' layout we | |
1620 | * can leave it unchanged, else we must | |
1621 | * fail | |
1622 | */ | |
358ef9bf JS |
1623 | ls = map_num(r6layout, |
1624 | info->new_layout); | |
0073a6e1 N |
1625 | if (!ls || |
1626 | strcmp(ls+strlen(ls)-2, "-6") != 0) | |
1627 | return "Please specify new layout"; | |
1628 | l = info->new_layout; | |
1629 | } | |
5da9ab98 N |
1630 | re->after.layout = l; |
1631 | } | |
1632 | } | |
1633 | break; | |
1634 | ||
1635 | case 6: | |
1636 | /* We must already be at level 6 */ | |
1637 | if (re->level != 6) | |
1638 | return "Impossible level change"; | |
5da9ab98 | 1639 | if (info->new_layout == UnSet) |
4a870364 | 1640 | re->after.layout = info->array.layout; |
5da9ab98 N |
1641 | else |
1642 | re->after.layout = info->new_layout; | |
1643 | break; | |
1644 | default: | |
1645 | return "Impossible level change requested"; | |
1646 | } | |
b545e14a N |
1647 | if (info->delta_disks == UnSet) |
1648 | info->delta_disks = delta_parity; | |
1649 | ||
6ebf34e6 JS |
1650 | re->after.data_disks = |
1651 | (re->before.data_disks + info->delta_disks - delta_parity); | |
1652 | ||
5da9ab98 | 1653 | switch (re->level) { |
6ebf34e6 JS |
1654 | case 6: |
1655 | re->parity = 2; | |
ca3b6696 | 1656 | break; |
5da9ab98 | 1657 | case 4: |
6ebf34e6 JS |
1658 | case 5: |
1659 | re->parity = 1; | |
ca3b6696 | 1660 | break; |
6ebf34e6 JS |
1661 | default: |
1662 | re->parity = 0; | |
ca3b6696 | 1663 | break; |
5da9ab98 N |
1664 | } |
1665 | /* So we have a restripe operation, we need to calculate the number | |
1666 | * of blocks per reshape operation. | |
1667 | */ | |
ddbf2ebb | 1668 | re->new_size = info->component_size * re->before.data_disks; |
5da9ab98 N |
1669 | if (info->new_chunk == 0) |
1670 | info->new_chunk = info->array.chunk_size; | |
1671 | if (re->after.data_disks == re->before.data_disks && | |
1672 | re->after.layout == re->before.layout && | |
1673 | info->new_chunk == info->array.chunk_size) { | |
fdcad551 N |
1674 | /* Nothing to change, can change level immediately. */ |
1675 | re->level = info->new_level; | |
b4f8e38b | 1676 | re->backup_blocks = 0; |
5da9ab98 N |
1677 | return NULL; |
1678 | } | |
1679 | if (re->after.data_disks == 1 && re->before.data_disks == 1) { | |
446d2a5a | 1680 | /* chunk and layout changes make no difference */ |
fdcad551 | 1681 | re->level = info->new_level; |
b4f8e38b | 1682 | re->backup_blocks = 0; |
5da9ab98 N |
1683 | return NULL; |
1684 | } | |
1685 | ||
1686 | if (re->after.data_disks == re->before.data_disks && | |
1687 | get_linux_version() < 2006032) | |
1688 | return "in-place reshape is not safe before 2.6.32 - sorry."; | |
1689 | ||
1690 | if (re->after.data_disks < re->before.data_disks && | |
1691 | get_linux_version() < 2006030) | |
508ede86 | 1692 | return "reshape to fewer devices is not supported before 2.6.30 - sorry."; |
5da9ab98 | 1693 | |
b4f8e38b | 1694 | re->backup_blocks = compute_backup_blocks( |
5da9ab98 | 1695 | info->new_chunk, info->array.chunk_size, |
358ef9bf | 1696 | re->after.data_disks, re->before.data_disks); |
63c12c89 | 1697 | re->min_offset_change = re->backup_blocks / re->before.data_disks; |
5da9ab98 N |
1698 | |
1699 | re->new_size = info->component_size * re->after.data_disks; | |
1700 | return NULL; | |
1701 | } | |
1702 | ||
54397ed9 AK |
1703 | static int set_array_size(struct supertype *st, struct mdinfo *sra, |
1704 | char *text_version) | |
1705 | { | |
1706 | struct mdinfo *info; | |
1707 | char *subarray; | |
1708 | int ret_val = -1; | |
1709 | ||
1710 | if ((st == NULL) || (sra == NULL)) | |
1711 | return ret_val; | |
1712 | ||
1713 | if (text_version == NULL) | |
1714 | text_version = sra->text_version; | |
6ebf34e6 | 1715 | subarray = strchr(text_version + 1, '/')+1; |
54397ed9 AK |
1716 | info = st->ss->container_content(st, subarray); |
1717 | if (info) { | |
1718 | unsigned long long current_size = 0; | |
358ef9bf | 1719 | unsigned long long new_size = info->custom_array_size/2; |
54397ed9 AK |
1720 | |
1721 | if (sysfs_get_ll(sra, NULL, "array_size", ¤t_size) == 0 && | |
1722 | new_size > current_size) { | |
1723 | if (sysfs_set_num(sra, NULL, "array_size", new_size) | |
1724 | < 0) | |
1725 | dprintf("Error: Cannot set array size"); | |
1726 | else { | |
1727 | ret_val = 0; | |
1728 | dprintf("Array size changed"); | |
1729 | } | |
1ade5cc1 N |
1730 | dprintf_cont(" from %llu to %llu.\n", |
1731 | current_size, new_size); | |
54397ed9 AK |
1732 | } |
1733 | sysfs_free(info); | |
1734 | } else | |
1735 | dprintf("Error: set_array_size(): info pointer in NULL\n"); | |
1736 | ||
1737 | return ret_val; | |
1738 | } | |
1739 | ||
5da9ab98 N |
1740 | static int reshape_array(char *container, int fd, char *devname, |
1741 | struct supertype *st, struct mdinfo *info, | |
e2e53a2d | 1742 | int force, struct mddev_dev *devlist, |
19ceb16d | 1743 | unsigned long long data_offset, |
ba728be7 | 1744 | char *backup_file, int verbose, int forked, |
b76b30e0 | 1745 | int restart, int freeze_reshape); |
493f5dd6 | 1746 | static int reshape_container(char *container, char *devname, |
9ad6f6e6 | 1747 | int mdfd, |
24daa16f | 1748 | struct supertype *st, |
5da9ab98 N |
1749 | struct mdinfo *info, |
1750 | int force, | |
b0140ae8 N |
1751 | char *backup_file, int verbose, |
1752 | int forked, int restart, int freeze_reshape); | |
1c009fc2 | 1753 | |
32754b7d | 1754 | int Grow_reshape(char *devname, int fd, |
e2e53a2d | 1755 | struct mddev_dev *devlist, |
40c9a66a | 1756 | unsigned long long data_offset, |
32754b7d | 1757 | struct context *c, struct shape *s) |
e86c9dd6 NB |
1758 | { |
1759 | /* Make some changes in the shape of an array. | |
1760 | * The kernel must support the change. | |
7236ee7a N |
1761 | * |
1762 | * There are three different changes. Each can trigger | |
1763 | * a resync or recovery so we freeze that until we have | |
1764 | * requested everything (if kernel supports freezing - 2.6.30). | |
1765 | * The steps are: | |
1766 | * - change size (i.e. component_size) | |
1767 | * - change level | |
1768 | * - change layout/chunksize/ndisks | |
1769 | * | |
1770 | * The last can require a reshape. It is different on different | |
1771 | * levels so we need to check the level before actioning it. | |
1772 | * Some times the level change needs to be requested after the | |
1773 | * reshape (e.g. raid6->raid5, raid5->raid0) | |
1774 | * | |
e86c9dd6 | 1775 | */ |
5da9ab98 | 1776 | struct mdu_array_info_s array; |
7236ee7a | 1777 | int rv = 0; |
e86c9dd6 | 1778 | struct supertype *st; |
4725bc31 | 1779 | char *subarray = NULL; |
e86c9dd6 | 1780 | |
7236ee7a | 1781 | int frozen; |
7236ee7a | 1782 | int changed = 0; |
7bc71196 DW |
1783 | char *container = NULL; |
1784 | int cfd = -1; | |
e86c9dd6 | 1785 | |
e2e53a2d N |
1786 | struct mddev_dev *dv; |
1787 | int added_disks; | |
1788 | ||
5da9ab98 | 1789 | struct mdinfo info; |
7e0f6979 | 1790 | struct mdinfo *sra; |
e86c9dd6 | 1791 | |
9cd39f01 | 1792 | if (md_get_array_info(fd, &array) < 0) { |
ed503f89 | 1793 | pr_err("%s is not an active md array - aborting\n", |
e86c9dd6 NB |
1794 | devname); |
1795 | return 1; | |
1796 | } | |
6ebf34e6 JS |
1797 | if (data_offset != INVALID_SECTORS && array.level != 10 && |
1798 | (array.level < 4 || array.level > 6)) { | |
19ceb16d N |
1799 | pr_err("--grow --data-offset not yet supported\n"); |
1800 | return 1; | |
1801 | } | |
24d40069 | 1802 | |
32754b7d N |
1803 | if (s->size > 0 && |
1804 | (s->chunk || s->level!= UnSet || s->layout_str || s->raiddisks)) { | |
7a862a02 N |
1805 | pr_err("cannot change component size at the same time as other changes.\n" |
1806 | " Change size first, then check data is intact before making other changes.\n"); | |
9ce510be N |
1807 | return 1; |
1808 | } | |
1809 | ||
6ebf34e6 JS |
1810 | if (s->raiddisks && s->raiddisks < array.raid_disks && |
1811 | array.level > 1 && get_linux_version() < 2006032 && | |
24d40069 | 1812 | !check_env("MDADM_FORCE_FEWER")) { |
e7b84f9d | 1813 | pr_err("reducing the number of devices is not safe before Linux 2.6.32\n" |
24d40069 N |
1814 | " Please use a newer kernel\n"); |
1815 | return 1; | |
1816 | } | |
7bc71196 | 1817 | |
56e1e6ac | 1818 | if (array.level > 1 && s->size > 1 && |
1b21c449 | 1819 | (array.chunk_size / 1024) > (int)s->size) { |
4b74a905 ZL |
1820 | pr_err("component size must be larger than chunk size.\n"); |
1821 | return 1; | |
1822 | } | |
1823 | ||
7bc71196 DW |
1824 | st = super_by_fd(fd, &subarray); |
1825 | if (!st) { | |
e7b84f9d | 1826 | pr_err("Unable to determine metadata format for %s\n", devname); |
7bc71196 DW |
1827 | return 1; |
1828 | } | |
32754b7d | 1829 | if (s->raiddisks > st->max_devs) { |
7a862a02 | 1830 | pr_err("Cannot increase raid-disks on this array beyond %d\n", st->max_devs); |
acab7bb1 N |
1831 | return 1; |
1832 | } | |
f7cf9699 XN |
1833 | if (s->level == 0 && |
1834 | (array.state & (1<<MD_SB_BITMAP_PRESENT)) && | |
1835 | !(array.state & (1<<MD_SB_CLUSTERED))) { | |
1836 | array.state &= ~(1<<MD_SB_BITMAP_PRESENT); | |
018a4882 | 1837 | if (md_set_array_info(fd, &array)!= 0) { |
f7cf9699 XN |
1838 | pr_err("failed to remove internal bitmap.\n"); |
1839 | return 1; | |
1840 | } | |
1841 | } | |
7bc71196 DW |
1842 | |
1843 | /* in the external case we need to check that the requested reshape is | |
1844 | * supported, and perform an initial check that the container holds the | |
1845 | * pre-requisite spare devices (mdmon owns final validation) | |
1846 | */ | |
1847 | if (st->ss->external) { | |
49948a35 | 1848 | int retval; |
7bc71196 DW |
1849 | |
1850 | if (subarray) { | |
4dd2df09 N |
1851 | container = st->container_devnm; |
1852 | cfd = open_dev_excl(st->container_devnm); | |
7bc71196 | 1853 | } else { |
4dd2df09 | 1854 | container = st->devnm; |
7bc71196 | 1855 | close(fd); |
4dd2df09 | 1856 | cfd = open_dev_excl(st->devnm); |
7bc71196 DW |
1857 | fd = cfd; |
1858 | } | |
1859 | if (cfd < 0) { | |
358ef9bf | 1860 | pr_err("Unable to open container for %s\n", devname); |
7f2ba464 | 1861 | free(subarray); |
7bc71196 DW |
1862 | return 1; |
1863 | } | |
1864 | ||
49948a35 | 1865 | retval = st->ss->load_container(st, cfd, NULL); |
eb744788 | 1866 | |
49948a35 | 1867 | if (retval) { |
358ef9bf | 1868 | pr_err("Cannot read superblock for %s\n", devname); |
7f2ba464 | 1869 | free(subarray); |
7bc71196 DW |
1870 | return 1; |
1871 | } | |
1872 | ||
81219e70 LM |
1873 | /* check if operation is supported for metadata handler */ |
1874 | if (st->ss->container_content) { | |
1875 | struct mdinfo *cc = NULL; | |
1876 | struct mdinfo *content = NULL; | |
1877 | ||
1878 | cc = st->ss->container_content(st, subarray); | |
1879 | for (content = cc; content ; content = content->next) { | |
446894ea | 1880 | int allow_reshape = 1; |
81219e70 LM |
1881 | |
1882 | /* check if reshape is allowed based on metadata | |
1883 | * indications stored in content.array.status | |
1884 | */ | |
6ebf34e6 JS |
1885 | if (content->array.state & |
1886 | (1 << MD_SB_BLOCK_VOLUME)) | |
446894ea | 1887 | allow_reshape = 0; |
6ebf34e6 JS |
1888 | if (content->array.state & |
1889 | (1 << MD_SB_BLOCK_CONTAINER_RESHAPE)) | |
446894ea | 1890 | allow_reshape = 0; |
81219e70 | 1891 | if (!allow_reshape) { |
7a862a02 | 1892 | pr_err("cannot reshape arrays in container with unsupported metadata: %s(%s)\n", |
4dd2df09 | 1893 | devname, container); |
81219e70 LM |
1894 | sysfs_free(cc); |
1895 | free(subarray); | |
1896 | return 1; | |
1897 | } | |
b208f817 TM |
1898 | if (content->consistency_policy == |
1899 | CONSISTENCY_POLICY_PPL) { | |
1900 | pr_err("Operation not supported when ppl consistency policy is enabled\n"); | |
1901 | sysfs_free(cc); | |
1902 | free(subarray); | |
1903 | return 1; | |
1904 | } | |
81219e70 LM |
1905 | } |
1906 | sysfs_free(cc); | |
1907 | } | |
4dd2df09 | 1908 | if (mdmon_running(container)) |
7bc71196 | 1909 | st->update_tail = &st->updates; |
e2e53a2d | 1910 | } |
691a36b7 | 1911 | |
e2e53a2d N |
1912 | added_disks = 0; |
1913 | for (dv = devlist; dv; dv = dv->next) | |
1914 | added_disks++; | |
32754b7d | 1915 | if (s->raiddisks > array.raid_disks && |
358ef9bf JS |
1916 | array.spare_disks + added_disks < |
1917 | (s->raiddisks - array.raid_disks) && | |
32754b7d | 1918 | !c->force) { |
7a862a02 | 1919 | pr_err("Need %d spare%s to avoid degraded array, and only have %d.\n" |
e7b84f9d | 1920 | " Use --force to over-ride this check.\n", |
32754b7d N |
1921 | s->raiddisks - array.raid_disks, |
1922 | s->raiddisks - array.raid_disks == 1 ? "" : "s", | |
e7b84f9d | 1923 | array.spare_disks + added_disks); |
691a36b7 | 1924 | return 1; |
7bc71196 DW |
1925 | } |
1926 | ||
6ebf34e6 JS |
1927 | sra = sysfs_read(fd, NULL, GET_LEVEL | GET_DISKS | GET_DEVS | |
1928 | GET_STATE | GET_VERSION); | |
24daa16f | 1929 | if (sra) { |
7f2ba464 | 1930 | if (st->ss->external && subarray == NULL) { |
7bc71196 DW |
1931 | array.level = LEVEL_CONTAINER; |
1932 | sra->array.level = LEVEL_CONTAINER; | |
1933 | } | |
7bc71196 | 1934 | } else { |
e7b84f9d | 1935 | pr_err("failed to read sysfs parameters for %s\n", |
b526e52d DW |
1936 | devname); |
1937 | return 1; | |
1938 | } | |
7f2ba464 DW |
1939 | frozen = freeze(st); |
1940 | if (frozen < -1) { | |
1941 | /* freeze() already spewed the reason */ | |
8e61e0d7 | 1942 | sysfs_free(sra); |
7f2ba464 DW |
1943 | return 1; |
1944 | } else if (frozen < 0) { | |
7a862a02 | 1945 | pr_err("%s is performing resync/recovery and cannot be reshaped\n", devname); |
8e61e0d7 | 1946 | sysfs_free(sra); |
7236ee7a N |
1947 | return 1; |
1948 | } | |
1949 | ||
1950 | /* ========= set size =============== */ | |
6ebf34e6 JS |
1951 | if (s->size > 0 && |
1952 | (s->size == MAX_SIZE || s->size != (unsigned)array.size)) { | |
d04f65f4 N |
1953 | unsigned long long orig_size = get_component_size(fd)/2; |
1954 | unsigned long long min_csize; | |
d1537ed1 | 1955 | struct mdinfo *mdi; |
44f6f181 | 1956 | int raid0_takeover = 0; |
7bc71196 | 1957 | |
85f10287 | 1958 | if (orig_size == 0) |
d04f65f4 | 1959 | orig_size = (unsigned) array.size; |
85f10287 | 1960 | |
3920235e N |
1961 | if (orig_size == 0) { |
1962 | pr_err("Cannot set device size in this type of array.\n"); | |
1963 | rv = 1; | |
1964 | goto release; | |
1965 | } | |
1966 | ||
32754b7d | 1967 | if (reshape_super(st, s->size, UnSet, UnSet, 0, 0, UnSet, NULL, |
6ebf34e6 JS |
1968 | devname, APPLY_METADATA_CHANGES, |
1969 | c->verbose > 0)) { | |
7bc71196 DW |
1970 | rv = 1; |
1971 | goto release; | |
1972 | } | |
1973 | sync_metadata(st); | |
7e7e9a4d AK |
1974 | if (st->ss->external) { |
1975 | /* metadata can have size limitation | |
1976 | * update size value according to metadata information | |
1977 | */ | |
1978 | struct mdinfo *sizeinfo = | |
1979 | st->ss->container_content(st, subarray); | |
1980 | if (sizeinfo) { | |
1981 | unsigned long long new_size = | |
1982 | sizeinfo->custom_array_size/2; | |
1983 | int data_disks = get_data_disks( | |
1984 | sizeinfo->array.level, | |
1985 | sizeinfo->array.layout, | |
1986 | sizeinfo->array.raid_disks); | |
1987 | new_size /= data_disks; | |
6ebf34e6 JS |
1988 | dprintf("Metadata size correction from %llu to %llu (%llu)\n", |
1989 | orig_size, new_size, | |
7e7e9a4d | 1990 | new_size * data_disks); |
32754b7d | 1991 | s->size = new_size; |
7e7e9a4d AK |
1992 | sysfs_free(sizeinfo); |
1993 | } | |
1994 | } | |
d1537ed1 N |
1995 | |
1996 | /* Update the size of each member device in case | |
1997 | * they have been resized. This will never reduce | |
1998 | * below the current used-size. The "size" attribute | |
20a46756 | 1999 | * understands '0' to mean 'max'. |
d1537ed1 | 2000 | */ |
20a46756 N |
2001 | min_csize = 0; |
2002 | for (mdi = sra->devs; mdi; mdi = mdi->next) { | |
358ef9bf JS |
2003 | sysfs_set_num(sra, mdi, "size", |
2004 | s->size == MAX_SIZE ? 0 : s->size); | |
20a46756 N |
2005 | if (array.not_persistent == 0 && |
2006 | array.major_version == 0 && | |
2007 | get_linux_version() < 3001000) { | |
2008 | /* Dangerous to allow size to exceed 2TB */ | |
2009 | unsigned long long csize; | |
358ef9bf JS |
2010 | if (sysfs_get_ll(sra, mdi, "size", |
2011 | &csize) == 0) { | |
20a46756 N |
2012 | if (csize >= 2ULL*1024*1024*1024) |
2013 | csize = 2ULL*1024*1024*1024; | |
358ef9bf JS |
2014 | if ((min_csize == 0 || |
2015 | (min_csize > csize))) | |
20a46756 N |
2016 | min_csize = csize; |
2017 | } | |
2018 | } | |
2019 | } | |
32754b7d | 2020 | if (min_csize && s->size > min_csize) { |
7a862a02 | 2021 | pr_err("Cannot safely make this array use more than 2TB per device on this kernel.\n"); |
20a46756 | 2022 | rv = 1; |
65a9798b | 2023 | goto size_change_error; |
20a46756 | 2024 | } |
32754b7d | 2025 | if (min_csize && s->size == MAX_SIZE) { |
20a46756 N |
2026 | /* Don't let the kernel choose a size - it will get |
2027 | * it wrong | |
2028 | */ | |
7a862a02 | 2029 | pr_err("Limited v0.90 array to 2TB per device\n"); |
32754b7d | 2030 | s->size = min_csize; |
20a46756 | 2031 | } |
44f6f181 AK |
2032 | if (st->ss->external) { |
2033 | if (sra->array.level == 0) { | |
358ef9bf | 2034 | rv = sysfs_set_str(sra, NULL, "level", "raid5"); |
44f6f181 AK |
2035 | if (!rv) { |
2036 | raid0_takeover = 1; | |
2a6493cf N |
2037 | /* get array parameters after takeover |
2038 | * to change one parameter at time only | |
44f6f181 | 2039 | */ |
9cd39f01 | 2040 | rv = md_get_array_info(fd, &array); |
44f6f181 AK |
2041 | } |
2042 | } | |
2043 | /* make sure mdmon is | |
2044 | * aware of the new level */ | |
4dd2df09 N |
2045 | if (!mdmon_running(st->container_devnm)) |
2046 | start_mdmon(st->container_devnm); | |
44f6f181 | 2047 | ping_monitor(container); |
4dd2df09 | 2048 | if (mdmon_running(st->container_devnm) && |
44f6f181 AK |
2049 | st->update_tail == NULL) |
2050 | st->update_tail = &st->updates; | |
2051 | } | |
2052 | ||
0a8b92a6 N |
2053 | if (s->size == MAX_SIZE) |
2054 | s->size = 0; | |
2055 | array.size = s->size; | |
0448027b | 2056 | if (s->size & ~INT32_MAX) { |
7236ee7a N |
2057 | /* got truncated to 32bit, write to |
2058 | * component_size instead | |
2059 | */ | |
2060 | if (sra) | |
2061 | rv = sysfs_set_num(sra, NULL, | |
32754b7d | 2062 | "component_size", s->size); |
7236ee7a N |
2063 | else |
2064 | rv = -1; | |
54397ed9 | 2065 | } else { |
018a4882 | 2066 | rv = md_set_array_info(fd, &array); |
44f6f181 | 2067 | |
54397ed9 AK |
2068 | /* manage array size when it is managed externally |
2069 | */ | |
2070 | if ((rv == 0) && st->ss->external) | |
2071 | rv = set_array_size(st, sra, sra->text_version); | |
2072 | } | |
2073 | ||
44f6f181 AK |
2074 | if (raid0_takeover) { |
2075 | /* do not recync non-existing parity, | |
2076 | * we will drop it anyway | |
2077 | */ | |
b51702b8 | 2078 | sysfs_set_str(sra, NULL, "sync_action", "frozen"); |
44f6f181 AK |
2079 | /* go back to raid0, drop parity disk |
2080 | */ | |
2081 | sysfs_set_str(sra, NULL, "level", "raid0"); | |
9cd39f01 | 2082 | md_get_array_info(fd, &array); |
44f6f181 AK |
2083 | } |
2084 | ||
65a9798b | 2085 | size_change_error: |
7236ee7a | 2086 | if (rv != 0) { |
39bbb392 | 2087 | int err = errno; |
7bc71196 DW |
2088 | |
2089 | /* restore metadata */ | |
2090 | if (reshape_super(st, orig_size, UnSet, UnSet, 0, 0, | |
016e00f5 AK |
2091 | UnSet, NULL, devname, |
2092 | ROLLBACK_METADATA_CHANGES, | |
32754b7d | 2093 | c->verbose) == 0) |
7bc71196 | 2094 | sync_metadata(st); |
e7b84f9d | 2095 | pr_err("Cannot set device size for %s: %s\n", |
39bbb392 | 2096 | devname, strerror(err)); |
24daa16f | 2097 | if (err == EBUSY && |
39bbb392 | 2098 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) |
e7b84f9d | 2099 | cont_err("Bitmap must be removed before size can be changed\n"); |
7236ee7a N |
2100 | rv = 1; |
2101 | goto release; | |
2102 | } | |
32754b7d | 2103 | if (s->assume_clean) { |
86952387 | 2104 | /* This will fail on kernels older than 3.0 unless |
ce52f92f N |
2105 | * a backport has been arranged. |
2106 | */ | |
2107 | if (sra == NULL || | |
358ef9bf JS |
2108 | sysfs_set_str(sra, NULL, "resync_start", |
2109 | "none") < 0) | |
86952387 | 2110 | pr_err("--assume-clean not supported with --grow on this kernel\n"); |
ce52f92f | 2111 | } |
9cd39f01 | 2112 | md_get_array_info(fd, &array); |
32754b7d N |
2113 | s->size = get_component_size(fd)/2; |
2114 | if (s->size == 0) | |
2115 | s->size = array.size; | |
2116 | if (c->verbose >= 0) { | |
2117 | if (s->size == orig_size) | |
7a862a02 | 2118 | pr_err("component size of %s unchanged at %lluK\n", |
32754b7d | 2119 | devname, s->size); |
85f10287 | 2120 | else |
7a862a02 | 2121 | pr_err("component size of %s has been set to %lluK\n", |
32754b7d | 2122 | devname, s->size); |
85f10287 | 2123 | } |
7236ee7a | 2124 | changed = 1; |
7bc71196 | 2125 | } else if (array.level != LEVEL_CONTAINER) { |
32754b7d N |
2126 | s->size = get_component_size(fd)/2; |
2127 | if (s->size == 0) | |
2128 | s->size = array.size; | |
7236ee7a N |
2129 | } |
2130 | ||
d515d27f | 2131 | /* See if there is anything else to do */ |
32754b7d N |
2132 | if ((s->level == UnSet || s->level == array.level) && |
2133 | (s->layout_str == NULL) && | |
2134 | (s->chunk == 0 || s->chunk == array.chunk_size) && | |
8876bf0b | 2135 | data_offset == INVALID_SECTORS && |
32754b7d | 2136 | (s->raiddisks == 0 || s->raiddisks == array.raid_disks)) { |
d515d27f | 2137 | /* Nothing more to do */ |
32754b7d | 2138 | if (!changed && c->verbose >= 0) |
358ef9bf | 2139 | pr_err("%s: no change requested\n", devname); |
d515d27f N |
2140 | goto release; |
2141 | } | |
2142 | ||
dfe77a9e | 2143 | /* ========= check for Raid10/Raid1 -> Raid0 conversion =============== |
5da9ab98 | 2144 | * current implementation assumes that following conditions must be met: |
dfe77a9e | 2145 | * - RAID10: |
24daa16f N |
2146 | * - far_copies == 1 |
2147 | * - near_copies == 2 | |
62a48395 | 2148 | */ |
32754b7d | 2149 | if ((s->level == 0 && array.level == 10 && sra && |
24daa16f | 2150 | array.layout == ((1 << 8) + 2) && !(array.raid_disks & 1)) || |
32754b7d | 2151 | (s->level == 0 && array.level == 1 && sra)) { |
62a48395 | 2152 | int err; |
358ef9bf | 2153 | |
dfe77a9e | 2154 | err = remove_disks_for_takeover(st, sra, array.layout); |
62a48395 | 2155 | if (err) { |
1ade5cc1 | 2156 | dprintf("Array cannot be reshaped\n"); |
62a48395 AK |
2157 | if (cfd > -1) |
2158 | close(cfd); | |
5da9ab98 N |
2159 | rv = 1; |
2160 | goto release; | |
7236ee7a | 2161 | } |
fde139b9 N |
2162 | /* Make sure mdmon has seen the device removal |
2163 | * and updated metadata before we continue with | |
2164 | * level change | |
2165 | */ | |
2166 | if (container) | |
2167 | ping_monitor(container); | |
7236ee7a N |
2168 | } |
2169 | ||
8ff6d094 | 2170 | memset(&info, 0, sizeof(info)); |
5da9ab98 | 2171 | info.array = array; |
dae13137 JS |
2172 | if (sysfs_init(&info, fd, NULL)) { |
2173 | pr_err("failed to intialize sysfs.\n"); | |
2174 | rv = 1; | |
2175 | goto release; | |
2176 | } | |
3fa436ac | 2177 | strcpy(info.text_version, sra->text_version); |
32754b7d N |
2178 | info.component_size = s->size*2; |
2179 | info.new_level = s->level; | |
2180 | info.new_chunk = s->chunk * 1024; | |
eff4954d N |
2181 | if (info.array.level == LEVEL_CONTAINER) { |
2182 | info.delta_disks = UnSet; | |
32754b7d N |
2183 | info.array.raid_disks = s->raiddisks; |
2184 | } else if (s->raiddisks) | |
2185 | info.delta_disks = s->raiddisks - info.array.raid_disks; | |
5da9ab98 N |
2186 | else |
2187 | info.delta_disks = UnSet; | |
32754b7d | 2188 | if (s->layout_str == NULL) { |
5da9ab98 N |
2189 | info.new_layout = UnSet; |
2190 | if (info.array.level == 6 && | |
2191 | (info.new_level == 6 || info.new_level == UnSet) && | |
2192 | info.array.layout >= 16) { | |
7a862a02 N |
2193 | pr_err("%s has a non-standard layout. If you wish to preserve this\n", devname); |
2194 | cont_err("during the reshape, please specify --layout=preserve\n"); | |
2195 | cont_err("If you want to change it, specify a layout or use --layout=normalise\n"); | |
7236ee7a N |
2196 | rv = 1; |
2197 | goto release; | |
2198 | } | |
32754b7d N |
2199 | } else if (strcmp(s->layout_str, "normalise") == 0 || |
2200 | strcmp(s->layout_str, "normalize") == 0) { | |
5da9ab98 N |
2201 | /* If we have a -6 RAID6 layout, remove the '-6'. */ |
2202 | info.new_layout = UnSet; | |
2203 | if (info.array.level == 6 && info.new_level == UnSet) { | |
2204 | char l[40], *h; | |
2205 | strcpy(l, map_num(r6layout, info.array.layout)); | |
2206 | h = strrchr(l, '-'); | |
2207 | if (h && strcmp(h, "-6") == 0) { | |
2208 | *h = 0; | |
2209 | info.new_layout = map_name(r6layout, l); | |
7236ee7a | 2210 | } |
385167f3 | 2211 | } else { |
7a862a02 | 2212 | pr_err("%s is only meaningful when reshaping a RAID6 array.\n", s->layout_str); |
385167f3 N |
2213 | rv = 1; |
2214 | goto release; | |
7236ee7a | 2215 | } |
32754b7d | 2216 | } else if (strcmp(s->layout_str, "preserve") == 0) { |
385167f3 N |
2217 | /* This means that a non-standard RAID6 layout |
2218 | * is OK. | |
2219 | * In particular: | |
2220 | * - When reshape a RAID6 (e.g. adding a device) | |
2221 | * which is in a non-standard layout, it is OK | |
2222 | * to preserve that layout. | |
2223 | * - When converting a RAID5 to RAID6, leave it in | |
2224 | * the XXX-6 layout, don't re-layout. | |
2225 | */ | |
2226 | if (info.array.level == 6 && info.new_level == UnSet) | |
2227 | info.new_layout = info.array.layout; | |
2228 | else if (info.array.level == 5 && info.new_level == 6) { | |
2229 | char l[40]; | |
2230 | strcpy(l, map_num(r5layout, info.array.layout)); | |
2231 | strcat(l, "-6"); | |
2232 | info.new_layout = map_name(r6layout, l); | |
2233 | } else { | |
7a862a02 | 2234 | pr_err("%s in only meaningful when reshaping to RAID6\n", s->layout_str); |
385167f3 N |
2235 | rv = 1; |
2236 | goto release; | |
2237 | } | |
5da9ab98 N |
2238 | } else { |
2239 | int l = info.new_level; | |
2240 | if (l == UnSet) | |
2241 | l = info.array.level; | |
2242 | switch (l) { | |
2243 | case 5: | |
32754b7d | 2244 | info.new_layout = map_name(r5layout, s->layout_str); |
5da9ab98 N |
2245 | break; |
2246 | case 6: | |
32754b7d | 2247 | info.new_layout = map_name(r6layout, s->layout_str); |
5da9ab98 N |
2248 | break; |
2249 | case 10: | |
32754b7d | 2250 | info.new_layout = parse_layout_10(s->layout_str); |
5da9ab98 N |
2251 | break; |
2252 | case LEVEL_FAULTY: | |
32754b7d | 2253 | info.new_layout = parse_layout_faulty(s->layout_str); |
5da9ab98 N |
2254 | break; |
2255 | default: | |
7a862a02 | 2256 | pr_err("layout not meaningful with this level\n"); |
7bc71196 DW |
2257 | rv = 1; |
2258 | goto release; | |
2259 | } | |
5da9ab98 | 2260 | if (info.new_layout == UnSet) { |
7a862a02 | 2261 | pr_err("layout %s not understood for this level\n", |
32754b7d | 2262 | s->layout_str); |
5da9ab98 N |
2263 | rv = 1; |
2264 | goto release; | |
7bc71196 | 2265 | } |
7236ee7a N |
2266 | } |
2267 | ||
907ea753 | 2268 | if (array.level == LEVEL_FAULTY) { |
32754b7d | 2269 | if (s->level != UnSet && s->level != array.level) { |
e7b84f9d | 2270 | pr_err("cannot change level of Faulty device\n"); |
907ea753 N |
2271 | rv =1 ; |
2272 | } | |
32754b7d | 2273 | if (s->chunk) { |
e7b84f9d | 2274 | pr_err("cannot set chunksize of Faulty device\n"); |
907ea753 N |
2275 | rv =1 ; |
2276 | } | |
32754b7d | 2277 | if (s->raiddisks && s->raiddisks != 1) { |
e7b84f9d | 2278 | pr_err("cannot set raid_disks of Faulty device\n"); |
907ea753 N |
2279 | rv =1 ; |
2280 | } | |
32754b7d | 2281 | if (s->layout_str) { |
9cd39f01 | 2282 | if (md_get_array_info(fd, &array) != 0) { |
907ea753 N |
2283 | dprintf("Cannot get array information.\n"); |
2284 | goto release; | |
2285 | } | |
2286 | array.layout = info.new_layout; | |
018a4882 | 2287 | if (md_set_array_info(fd, &array) != 0) { |
e7b84f9d | 2288 | pr_err("failed to set new layout\n"); |
907ea753 | 2289 | rv = 1; |
32754b7d | 2290 | } else if (c->verbose >= 0) |
907ea753 N |
2291 | printf("layout for %s set to %d\n", |
2292 | devname, array.layout); | |
2293 | } | |
2294 | } else if (array.level == LEVEL_CONTAINER) { | |
5da9ab98 N |
2295 | /* This change is to be applied to every array in the |
2296 | * container. This is only needed when the metadata imposes | |
2297 | * restraints of the various arrays in the container. | |
2298 | * Currently we only know that IMSM requires all arrays | |
2299 | * to have the same number of devices so changing the | |
2300 | * number of devices (On-Line Capacity Expansion) must be | |
2301 | * performed at the level of the container | |
2302 | */ | |
ad2f4646 PB |
2303 | if (fd > 0) { |
2304 | close(fd); | |
2305 | fd = -1; | |
2306 | } | |
9ad6f6e6 | 2307 | rv = reshape_container(container, devname, -1, st, &info, |
358ef9bf JS |
2308 | c->force, c->backup_file, c->verbose, |
2309 | 0, 0, 0); | |
9202b8eb | 2310 | frozen = 0; |
5da9ab98 | 2311 | } else { |
08f9e34b AK |
2312 | /* get spare devices from external metadata |
2313 | */ | |
2314 | if (st->ss->external) { | |
2315 | struct mdinfo *info2; | |
2316 | ||
2317 | info2 = st->ss->container_content(st, subarray); | |
2318 | if (info2) { | |
2319 | info.array.spare_disks = | |
2320 | info2->array.spare_disks; | |
2321 | sysfs_free(info2); | |
2322 | } | |
2323 | } | |
2324 | ||
5da9ab98 N |
2325 | /* Impose these changes on a single array. First |
2326 | * check that the metadata is OK with the change. */ | |
7bc71196 | 2327 | |
7ec0996c | 2328 | if (reshape_super(st, 0, info.new_level, |
5da9ab98 | 2329 | info.new_layout, info.new_chunk, |
41784c88 | 2330 | info.array.raid_disks, info.delta_disks, |
358ef9bf JS |
2331 | c->backup_file, devname, |
2332 | APPLY_METADATA_CHANGES, c->verbose)) { | |
7bc71196 DW |
2333 | rv = 1; |
2334 | goto release; | |
2335 | } | |
5da9ab98 | 2336 | sync_metadata(st); |
32754b7d | 2337 | rv = reshape_array(container, fd, devname, st, &info, c->force, |
358ef9bf JS |
2338 | devlist, data_offset, c->backup_file, |
2339 | c->verbose, 0, 0, 0); | |
9202b8eb | 2340 | frozen = 0; |
5da9ab98 N |
2341 | } |
2342 | release: | |
8e61e0d7 | 2343 | sysfs_free(sra); |
9202b8eb N |
2344 | if (frozen > 0) |
2345 | unfreeze(st); | |
5da9ab98 N |
2346 | return rv; |
2347 | } | |
7bc71196 | 2348 | |
f93346ef AK |
2349 | /* verify_reshape_position() |
2350 | * Function checks if reshape position in metadata is not farther | |
2351 | * than position in md. | |
2352 | * Return value: | |
2353 | * 0 : not valid sysfs entry | |
2354 | * it can be caused by not started reshape, it should be started | |
2355 | * by reshape array or raid0 array is before takeover | |
2356 | * -1 : error, reshape position is obviously wrong | |
2357 | * 1 : success, reshape progress correct or updated | |
2358 | */ | |
2359 | static int verify_reshape_position(struct mdinfo *info, int level) | |
2360 | { | |
2361 | int ret_val = 0; | |
2362 | char buf[40]; | |
178950ea | 2363 | int rv; |
f93346ef AK |
2364 | |
2365 | /* read sync_max, failure can mean raid0 array */ | |
178950ea AK |
2366 | rv = sysfs_get_str(info, NULL, "sync_max", buf, 40); |
2367 | ||
2368 | if (rv > 0) { | |
f93346ef AK |
2369 | char *ep; |
2370 | unsigned long long position = strtoull(buf, &ep, 0); | |
2371 | ||
1ade5cc1 | 2372 | dprintf("Read sync_max sysfs entry is: %s\n", buf); |
f93346ef AK |
2373 | if (!(ep == buf || (*ep != 0 && *ep != '\n' && *ep != ' '))) { |
2374 | position *= get_data_disks(level, | |
2375 | info->new_layout, | |
2376 | info->array.raid_disks); | |
2377 | if (info->reshape_progress < position) { | |
7a862a02 | 2378 | dprintf("Corrected reshape progress (%llu) to md position (%llu)\n", |
f93346ef AK |
2379 | info->reshape_progress, position); |
2380 | info->reshape_progress = position; | |
2381 | ret_val = 1; | |
2382 | } else if (info->reshape_progress > position) { | |
7a862a02 | 2383 | pr_err("Fatal error: array reshape was not properly frozen (expected reshape position is %llu, but reshape progress is %llu.\n", |
e7b84f9d | 2384 | position, info->reshape_progress); |
f93346ef AK |
2385 | ret_val = -1; |
2386 | } else { | |
7a862a02 | 2387 | dprintf("Reshape position in md and metadata are the same;"); |
f93346ef AK |
2388 | ret_val = 1; |
2389 | } | |
2390 | } | |
178950ea AK |
2391 | } else if (rv == 0) { |
2392 | /* for valid sysfs entry, 0-length content | |
2393 | * should be indicated as error | |
2394 | */ | |
2395 | ret_val = -1; | |
f93346ef AK |
2396 | } |
2397 | ||
2398 | return ret_val; | |
2399 | } | |
2400 | ||
534f5432 N |
2401 | static unsigned long long choose_offset(unsigned long long lo, |
2402 | unsigned long long hi, | |
2403 | unsigned long long min, | |
2404 | unsigned long long max) | |
2405 | { | |
2406 | /* Choose a new offset between hi and lo. | |
2407 | * It must be between min and max, but | |
2408 | * we would prefer something near the middle of hi/lo, and also | |
2409 | * prefer to be aligned to a big power of 2. | |
2410 | * | |
2411 | * So we start with the middle, then for each bit, | |
2412 | * starting at '1' and increasing, if it is set, we either | |
2413 | * add it or subtract it if possible, preferring the option | |
2414 | * which is furthest from the boundary. | |
2415 | * | |
2416 | * We stop once we get a 1MB alignment. As units are in sectors, | |
2417 | * 1MB = 2*1024 sectors. | |
2418 | */ | |
2419 | unsigned long long choice = (lo + hi) / 2; | |
2420 | unsigned long long bit = 1; | |
2421 | ||
2422 | for (bit = 1; bit < 2*1024; bit = bit << 1) { | |
2423 | unsigned long long bigger, smaller; | |
2424 | if (! (bit & choice)) | |
2425 | continue; | |
2426 | bigger = choice + bit; | |
2427 | smaller = choice - bit; | |
2428 | if (bigger > max && smaller < min) | |
2429 | break; | |
2430 | if (bigger > max) | |
2431 | choice = smaller; | |
2432 | else if (smaller < min) | |
2433 | choice = bigger; | |
2434 | else if (hi - bigger > smaller - lo) | |
2435 | choice = bigger; | |
2436 | else | |
2437 | choice = smaller; | |
2438 | } | |
2439 | return choice; | |
2440 | } | |
2441 | ||
13bbb145 | 2442 | static int set_new_data_offset(struct mdinfo *sra, struct supertype *st, |
50a4962f | 2443 | char *devname, int delta_disks, |
13bbb145 | 2444 | unsigned long long data_offset, |
6a23fb9d N |
2445 | unsigned long long min, |
2446 | int can_fallback) | |
19ceb16d | 2447 | { |
13bbb145 | 2448 | struct mdinfo *sd; |
19ceb16d N |
2449 | int dir = 0; |
2450 | int err = 0; | |
f9b08fec | 2451 | unsigned long long before, after; |
19ceb16d | 2452 | |
f9b08fec N |
2453 | /* Need to find min space before and after so same is used |
2454 | * on all devices | |
2455 | */ | |
2456 | before = UINT64_MAX; | |
2457 | after = UINT64_MAX; | |
19ceb16d N |
2458 | for (sd = sra->devs; sd; sd = sd->next) { |
2459 | char *dn; | |
2460 | int dfd; | |
2461 | int rv; | |
2462 | struct supertype *st2; | |
2463 | struct mdinfo info2; | |
2464 | ||
2465 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
2466 | continue; | |
2467 | dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
2468 | dfd = dev_open(dn, O_RDONLY); | |
2469 | if (dfd < 0) { | |
ed503f89 | 2470 | pr_err("%s: cannot open component %s\n", |
19ceb16d | 2471 | devname, dn ? dn : "-unknown-"); |
19ceb16d N |
2472 | goto release; |
2473 | } | |
2474 | st2 = dup_super(st); | |
2475 | rv = st2->ss->load_super(st2,dfd, NULL); | |
2476 | close(dfd); | |
2477 | if (rv) { | |
2478 | free(st2); | |
ed503f89 | 2479 | pr_err("%s: cannot get superblock from %s\n", |
19ceb16d N |
2480 | devname, dn); |
2481 | goto release; | |
2482 | } | |
2483 | st2->ss->getinfo_super(st2, &info2, NULL); | |
2484 | st2->ss->free_super(st2); | |
2485 | free(st2); | |
c4b26c64 N |
2486 | if (info2.space_before == 0 && |
2487 | info2.space_after == 0) { | |
2488 | /* Metadata doesn't support data_offset changes */ | |
dd243f56 N |
2489 | if (!can_fallback) |
2490 | pr_err("%s: Metadata version doesn't support data_offset changes\n", | |
2491 | devname); | |
16afb1a5 | 2492 | goto fallback; |
c4b26c64 | 2493 | } |
f9b08fec N |
2494 | if (before > info2.space_before) |
2495 | before = info2.space_before; | |
2496 | if (after > info2.space_after) | |
2497 | after = info2.space_after; | |
2498 | ||
2499 | if (data_offset != INVALID_SECTORS) { | |
2500 | if (dir == 0) { | |
2501 | if (info2.data_offset == data_offset) { | |
2502 | pr_err("%s: already has that data_offset\n", | |
2503 | dn); | |
2504 | goto release; | |
2505 | } | |
2506 | if (data_offset < info2.data_offset) | |
2507 | dir = -1; | |
2508 | else | |
2509 | dir = 1; | |
358ef9bf JS |
2510 | } else if ((data_offset <= info2.data_offset && |
2511 | dir == 1) || | |
2512 | (data_offset >= info2.data_offset && | |
2513 | dir == -1)) { | |
f9b08fec N |
2514 | pr_err("%s: differing data offsets on devices make this --data-offset setting impossible\n", |
2515 | dn); | |
2516 | goto release; | |
2517 | } | |
2518 | } | |
2519 | } | |
2520 | if (before == UINT64_MAX) | |
2521 | /* impossible really, there must be no devices */ | |
2522 | return 1; | |
2523 | ||
2524 | for (sd = sra->devs; sd; sd = sd->next) { | |
2525 | char *dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
c0f0d812 | 2526 | unsigned long long new_data_offset; |
f9b08fec | 2527 | |
b397d7f3 N |
2528 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) |
2529 | continue; | |
50a4962f | 2530 | if (delta_disks < 0) { |
19ceb16d N |
2531 | /* Don't need any space as array is shrinking |
2532 | * just move data_offset up by min | |
2533 | */ | |
5582b118 | 2534 | if (data_offset == INVALID_SECTORS) |
c0f0d812 | 2535 | new_data_offset = sd->data_offset + min; |
19ceb16d | 2536 | else { |
c0f0d812 | 2537 | if (data_offset < sd->data_offset + min) { |
ed503f89 | 2538 | pr_err("--data-offset too small for %s\n", |
19ceb16d N |
2539 | dn); |
2540 | goto release; | |
2541 | } | |
c0f0d812 | 2542 | new_data_offset = data_offset; |
19ceb16d | 2543 | } |
50a4962f | 2544 | } else if (delta_disks > 0) { |
19ceb16d | 2545 | /* need space before */ |
f9b08fec | 2546 | if (before < min) { |
6a23fb9d N |
2547 | if (can_fallback) |
2548 | goto fallback; | |
ed503f89 | 2549 | pr_err("Insufficient head-space for reshape on %s\n", |
19ceb16d N |
2550 | dn); |
2551 | goto release; | |
2552 | } | |
5582b118 | 2553 | if (data_offset == INVALID_SECTORS) |
c0f0d812 | 2554 | new_data_offset = sd->data_offset - min; |
19ceb16d | 2555 | else { |
c0f0d812 | 2556 | if (data_offset > sd->data_offset - min) { |
ed503f89 | 2557 | pr_err("--data-offset too large for %s\n", |
19ceb16d N |
2558 | dn); |
2559 | goto release; | |
2560 | } | |
c0f0d812 | 2561 | new_data_offset = data_offset; |
19ceb16d N |
2562 | } |
2563 | } else { | |
2564 | if (dir == 0) { | |
f9b08fec N |
2565 | /* can move up or down. If 'data_offset' |
2566 | * was set we would have already decided, | |
2567 | * so just choose direction with most space. | |
19ceb16d | 2568 | */ |
c0f0d812 | 2569 | if (before > after) |
19ceb16d N |
2570 | dir = -1; |
2571 | else | |
2572 | dir = 1; | |
19ceb16d | 2573 | } |
b397d7f3 N |
2574 | sysfs_set_str(sra, NULL, "reshape_direction", |
2575 | dir == 1 ? "backwards" : "forwards"); | |
c0f0d812 N |
2576 | if (dir > 0) { |
2577 | /* Increase data offset */ | |
f9b08fec | 2578 | if (after < min) { |
6a23fb9d N |
2579 | if (can_fallback) |
2580 | goto fallback; | |
ed503f89 | 2581 | pr_err("Insufficient tail-space for reshape on %s\n", |
19ceb16d N |
2582 | dn); |
2583 | goto release; | |
2584 | } | |
5582b118 | 2585 | if (data_offset != INVALID_SECTORS && |
c0f0d812 | 2586 | data_offset < sd->data_offset + min) { |
ed503f89 | 2587 | pr_err("--data-offset too small on %s\n", |
19ceb16d N |
2588 | dn); |
2589 | goto release; | |
2590 | } | |
5582b118 | 2591 | if (data_offset != INVALID_SECTORS) |
c0f0d812 | 2592 | new_data_offset = data_offset; |
534f5432 N |
2593 | else |
2594 | new_data_offset = choose_offset(sd->data_offset, | |
2595 | sd->data_offset + after, | |
2596 | sd->data_offset + min, | |
2597 | sd->data_offset + after); | |
c0f0d812 N |
2598 | } else { |
2599 | /* Decrease data offset */ | |
f9b08fec | 2600 | if (before < min) { |
6a23fb9d N |
2601 | if (can_fallback) |
2602 | goto fallback; | |
ed503f89 | 2603 | pr_err("insufficient head-room on %s\n", |
19ceb16d N |
2604 | dn); |
2605 | goto release; | |
2606 | } | |
5582b118 | 2607 | if (data_offset != INVALID_SECTORS && |
c0f0d812 | 2608 | data_offset < sd->data_offset - min) { |
ed503f89 | 2609 | pr_err("--data-offset too small on %s\n", |
19ceb16d N |
2610 | dn); |
2611 | goto release; | |
2612 | } | |
5582b118 | 2613 | if (data_offset != INVALID_SECTORS) |
c0f0d812 | 2614 | new_data_offset = data_offset; |
534f5432 N |
2615 | else |
2616 | new_data_offset = choose_offset(sd->data_offset - before, | |
2617 | sd->data_offset, | |
2618 | sd->data_offset - before, | |
2619 | sd->data_offset - min); | |
19ceb16d N |
2620 | } |
2621 | } | |
a6a78630 N |
2622 | err = sysfs_set_num(sra, sd, "new_offset", new_data_offset); |
2623 | if (err < 0 && errno == E2BIG) { | |
2624 | /* try again after increasing data size to max */ | |
2625 | err = sysfs_set_num(sra, sd, "size", 0); | |
2626 | if (err < 0 && errno == EINVAL && | |
2627 | !(sd->disk.state & (1<<MD_DISK_SYNC))) { | |
2628 | /* some kernels have a bug where you cannot | |
2629 | * use '0' on spare devices. */ | |
2630 | sysfs_set_num(sra, sd, "size", | |
2631 | (sra->component_size + after)/2); | |
2632 | } | |
2633 | err = sysfs_set_num(sra, sd, "new_offset", | |
2634 | new_data_offset); | |
2635 | } | |
2636 | if (err < 0) { | |
d7e1f52b | 2637 | if (errno == E2BIG && data_offset != INVALID_SECTORS) { |
358ef9bf | 2638 | pr_err("data-offset is too big for %s\n", dn); |
d7e1f52b N |
2639 | goto release; |
2640 | } | |
9ad2a640 N |
2641 | if (sd == sra->devs && |
2642 | (errno == ENOENT || errno == E2BIG)) | |
2643 | /* Early kernel, no 'new_offset' file, | |
2644 | * or kernel doesn't like us. | |
93f174b9 N |
2645 | * For RAID5/6 this is not fatal |
2646 | */ | |
2647 | return 1; | |
358ef9bf | 2648 | pr_err("Cannot set new_offset for %s\n", dn); |
19ceb16d N |
2649 | break; |
2650 | } | |
2651 | } | |
13bbb145 N |
2652 | return err; |
2653 | release: | |
2654 | return -1; | |
6a23fb9d N |
2655 | fallback: |
2656 | /* Just use a backup file */ | |
2657 | return 1; | |
13bbb145 N |
2658 | } |
2659 | ||
2660 | static int raid10_reshape(char *container, int fd, char *devname, | |
2661 | struct supertype *st, struct mdinfo *info, | |
2662 | struct reshape *reshape, | |
2663 | unsigned long long data_offset, | |
2664 | int force, int verbose) | |
2665 | { | |
2666 | /* Changing raid_disks, layout, chunksize or possibly | |
2667 | * just data_offset for a RAID10. | |
2668 | * We must always change data_offset. We change by at least | |
89ecd3cf | 2669 | * ->min_offset_change which is the largest of the old and new |
13bbb145 N |
2670 | * chunk sizes. |
2671 | * If raid_disks is increasing, then data_offset must decrease | |
2672 | * by at least this copy size. | |
2673 | * If raid_disks is unchanged, data_offset must increase or | |
89ecd3cf | 2674 | * decrease by at least min_offset_change but preferably by much more. |
13bbb145 N |
2675 | * We choose half of the available space. |
2676 | * If raid_disks is decreasing, data_offset must increase by | |
89ecd3cf | 2677 | * at least min_offset_change. To allow of this, component_size |
13bbb145 N |
2678 | * must be decreased by the same amount. |
2679 | * | |
2680 | * So we calculate the required minimum and direction, possibly | |
2681 | * reduce the component_size, then iterate through the devices | |
2682 | * and set the new_data_offset. | |
2683 | * If that all works, we set chunk_size, layout, raid_disks, and start | |
2684 | * 'reshape' | |
2685 | */ | |
2686 | struct mdinfo *sra; | |
2687 | unsigned long long min; | |
2688 | int err = 0; | |
2689 | ||
2690 | sra = sysfs_read(fd, NULL, | |
2691 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK | |
2692 | ); | |
2693 | if (!sra) { | |
358ef9bf | 2694 | pr_err("%s: Cannot get array details from sysfs\n", devname); |
13bbb145 N |
2695 | goto release; |
2696 | } | |
89ecd3cf | 2697 | min = reshape->min_offset_change; |
13bbb145 N |
2698 | |
2699 | if (info->delta_disks) | |
2700 | sysfs_set_str(sra, NULL, "reshape_direction", | |
2701 | info->delta_disks < 0 ? "backwards" : "forwards"); | |
358ef9bf | 2702 | if (info->delta_disks < 0 && info->space_after < min) { |
13bbb145 | 2703 | int rv = sysfs_set_num(sra, NULL, "component_size", |
358ef9bf | 2704 | (sra->component_size - min)/2); |
13bbb145 | 2705 | if (rv) { |
ed503f89 | 2706 | pr_err("cannot reduce component size\n"); |
13bbb145 N |
2707 | goto release; |
2708 | } | |
2709 | } | |
358ef9bf JS |
2710 | err = set_new_data_offset(sra, st, devname, info->delta_disks, |
2711 | data_offset, min, 0); | |
93f174b9 N |
2712 | if (err == 1) { |
2713 | pr_err("Cannot set new_data_offset: RAID10 reshape not\n"); | |
2714 | cont_err("supported on this kernel\n"); | |
2715 | err = -1; | |
2716 | } | |
13bbb145 N |
2717 | if (err < 0) |
2718 | goto release; | |
2719 | ||
ee2429e0 | 2720 | if (!err && sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0) |
19ceb16d | 2721 | err = errno; |
358ef9bf JS |
2722 | if (!err && sysfs_set_num(sra, NULL, "layout", |
2723 | reshape->after.layout) < 0) | |
19ceb16d | 2724 | err = errno; |
358ef9bf JS |
2725 | if (!err && |
2726 | sysfs_set_num(sra, NULL, "raid_disks", | |
2727 | info->array.raid_disks + info->delta_disks) < 0) | |
19ceb16d N |
2728 | err = errno; |
2729 | if (!err && sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0) | |
2730 | err = errno; | |
2731 | if (err) { | |
ed503f89 | 2732 | pr_err("Cannot set array shape for %s\n", |
d33f1518 N |
2733 | devname); |
2734 | if (err == EBUSY && | |
2735 | (info->array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2736 | cont_err(" Bitmap must be removed before shape can be changed\n"); |
d33f1518 | 2737 | goto release; |
19ceb16d N |
2738 | } |
2739 | sysfs_free(sra); | |
2740 | return 0; | |
2741 | release: | |
2742 | sysfs_free(sra); | |
2743 | return 1; | |
2744 | } | |
2745 | ||
ee2429e0 N |
2746 | static void get_space_after(int fd, struct supertype *st, struct mdinfo *info) |
2747 | { | |
2748 | struct mdinfo *sra, *sd; | |
f3f09a52 LD |
2749 | /* Initialisation to silence compiler warning */ |
2750 | unsigned long long min_space_before = 0, min_space_after = 0; | |
ee2429e0 N |
2751 | int first = 1; |
2752 | ||
4dd2df09 | 2753 | sra = sysfs_read(fd, NULL, GET_DEVS); |
ee2429e0 N |
2754 | if (!sra) |
2755 | return; | |
2756 | for (sd = sra->devs; sd; sd = sd->next) { | |
2757 | char *dn; | |
2758 | int dfd; | |
2759 | struct supertype *st2; | |
2760 | struct mdinfo info2; | |
2761 | ||
2762 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
2763 | continue; | |
2764 | dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
2765 | dfd = dev_open(dn, O_RDONLY); | |
2766 | if (dfd < 0) | |
2767 | break; | |
2768 | st2 = dup_super(st); | |
2769 | if (st2->ss->load_super(st2,dfd, NULL)) { | |
2770 | close(dfd); | |
2771 | free(st2); | |
2772 | break; | |
2773 | } | |
2774 | close(dfd); | |
2775 | st2->ss->getinfo_super(st2, &info2, NULL); | |
2776 | st2->ss->free_super(st2); | |
2777 | free(st2); | |
2778 | if (first || | |
2779 | min_space_before > info2.space_before) | |
2780 | min_space_before = info2.space_before; | |
2781 | if (first || | |
2782 | min_space_after > info2.space_after) | |
2783 | min_space_after = info2.space_after; | |
2784 | first = 0; | |
2785 | } | |
2786 | if (sd == NULL && !first) { | |
2787 | info->space_after = min_space_after; | |
2788 | info->space_before = min_space_before; | |
2789 | } | |
2790 | sysfs_free(sra); | |
2791 | } | |
2792 | ||
434d167e N |
2793 | static void update_cache_size(char *container, struct mdinfo *sra, |
2794 | struct mdinfo *info, | |
2795 | int disks, unsigned long long blocks) | |
2796 | { | |
2797 | /* Check that the internal stripe cache is | |
2798 | * large enough, or it won't work. | |
2799 | * It must hold at least 4 stripes of the larger | |
2800 | * chunk size | |
2801 | */ | |
2802 | unsigned long cache; | |
2803 | cache = max(info->array.chunk_size, info->new_chunk); | |
2804 | cache *= 4; /* 4 stripes minimum */ | |
2805 | cache /= 512; /* convert to sectors */ | |
2806 | /* make sure there is room for 'blocks' with a bit to spare */ | |
2807 | if (cache < 16 + blocks / disks) | |
2808 | cache = 16 + blocks / disks; | |
caf9ac0c | 2809 | cache /= (4096/512); /* Convert from sectors to pages */ |
434d167e N |
2810 | |
2811 | if (sra->cache_size < cache) | |
2812 | subarray_set_num(container, sra, "stripe_cache_size", | |
2813 | cache+1); | |
2814 | } | |
2815 | ||
77afa056 N |
2816 | static int impose_reshape(struct mdinfo *sra, |
2817 | struct mdinfo *info, | |
2818 | struct supertype *st, | |
2819 | int fd, | |
2820 | int restart, | |
2821 | char *devname, char *container, | |
2822 | struct reshape *reshape) | |
2823 | { | |
2824 | struct mdu_array_info_s array; | |
2825 | ||
2826 | sra->new_chunk = info->new_chunk; | |
2827 | ||
2828 | if (restart) { | |
2829 | /* for external metadata checkpoint saved by mdmon can be lost | |
2830 | * or missed /due to e.g. crash/. Check if md is not during | |
2831 | * restart farther than metadata points to. | |
2832 | * If so, this means metadata information is obsolete. | |
2833 | */ | |
2834 | if (st->ss->external) | |
2835 | verify_reshape_position(info, reshape->level); | |
2836 | sra->reshape_progress = info->reshape_progress; | |
2837 | } else { | |
2838 | sra->reshape_progress = 0; | |
2839 | if (reshape->after.data_disks < reshape->before.data_disks) | |
2840 | /* start from the end of the new array */ | |
2841 | sra->reshape_progress = (sra->component_size | |
2842 | * reshape->after.data_disks); | |
2843 | } | |
2844 | ||
9cd39f01 | 2845 | md_get_array_info(fd, &array); |
77afa056 N |
2846 | if (info->array.chunk_size == info->new_chunk && |
2847 | reshape->before.layout == reshape->after.layout && | |
2848 | st->ss->external == 0) { | |
2849 | /* use SET_ARRAY_INFO but only if reshape hasn't started */ | |
2850 | array.raid_disks = reshape->after.data_disks + reshape->parity; | |
018a4882 | 2851 | if (!restart && md_set_array_info(fd, &array) != 0) { |
77afa056 N |
2852 | int err = errno; |
2853 | ||
2854 | pr_err("Cannot set device shape for %s: %s\n", | |
2855 | devname, strerror(errno)); | |
2856 | ||
2857 | if (err == EBUSY && | |
2858 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2859 | cont_err("Bitmap must be removed before shape can be changed\n"); |
77afa056 N |
2860 | |
2861 | goto release; | |
2862 | } | |
2863 | } else if (!restart) { | |
2864 | /* set them all just in case some old 'new_*' value | |
2865 | * persists from some earlier problem. | |
2866 | */ | |
2867 | int err = 0; | |
2868 | if (sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0) | |
2869 | err = errno; | |
2870 | if (!err && sysfs_set_num(sra, NULL, "layout", | |
2871 | reshape->after.layout) < 0) | |
2872 | err = errno; | |
2873 | if (!err && subarray_set_num(container, sra, "raid_disks", | |
2874 | reshape->after.data_disks + | |
2875 | reshape->parity) < 0) | |
2876 | err = errno; | |
2877 | if (err) { | |
358ef9bf | 2878 | pr_err("Cannot set device shape for %s\n", devname); |
77afa056 N |
2879 | |
2880 | if (err == EBUSY && | |
2881 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2882 | cont_err("Bitmap must be removed before shape can be changed\n"); |
77afa056 N |
2883 | goto release; |
2884 | } | |
2885 | } | |
2886 | return 0; | |
2887 | release: | |
2888 | return -1; | |
2889 | } | |
2890 | ||
97e3a6a0 N |
2891 | static int impose_level(int fd, int level, char *devname, int verbose) |
2892 | { | |
2893 | char *c; | |
2894 | struct mdu_array_info_s array; | |
2895 | struct mdinfo info; | |
dae13137 JS |
2896 | |
2897 | if (sysfs_init(&info, fd, NULL)) { | |
2898 | pr_err("failed to intialize sysfs.\n"); | |
2899 | return 1; | |
2900 | } | |
97e3a6a0 | 2901 | |
9cd39f01 | 2902 | md_get_array_info(fd, &array); |
358ef9bf | 2903 | if (level == 0 && (array.level >= 4 && array.level <= 6)) { |
97e3a6a0 N |
2904 | /* To convert to RAID0 we need to fail and |
2905 | * remove any non-data devices. */ | |
2906 | int found = 0; | |
2907 | int d; | |
2908 | int data_disks = array.raid_disks - 1; | |
2909 | if (array.level == 6) | |
2910 | data_disks -= 1; | |
358ef9bf | 2911 | if (array.level == 5 && array.layout != ALGORITHM_PARITY_N) |
97e3a6a0 | 2912 | return -1; |
358ef9bf | 2913 | if (array.level == 6 && array.layout != ALGORITHM_PARITY_N_6) |
97e3a6a0 N |
2914 | return -1; |
2915 | sysfs_set_str(&info, NULL,"sync_action", "idle"); | |
2916 | /* First remove any spares so no recovery starts */ | |
2917 | for (d = 0, found = 0; | |
358ef9bf | 2918 | d < MAX_DISKS && found < array.nr_disks; d++) { |
5e7be838 | 2919 | mdu_disk_info_t disk; |
97e3a6a0 | 2920 | disk.number = d; |
d97572f5 | 2921 | if (md_get_disk_info(fd, &disk) < 0) |
97e3a6a0 N |
2922 | continue; |
2923 | if (disk.major == 0 && disk.minor == 0) | |
2924 | continue; | |
2925 | found++; | |
fc54fe7a JS |
2926 | if ((disk.state & (1 << MD_DISK_ACTIVE)) && |
2927 | disk.raid_disk < data_disks) | |
97e3a6a0 N |
2928 | /* keep this */ |
2929 | continue; | |
2930 | ioctl(fd, HOT_REMOVE_DISK, | |
2931 | makedev(disk.major, disk.minor)); | |
2932 | } | |
2933 | /* Now fail anything left */ | |
9cd39f01 | 2934 | md_get_array_info(fd, &array); |
97e3a6a0 | 2935 | for (d = 0, found = 0; |
358ef9bf | 2936 | d < MAX_DISKS && found < array.nr_disks; d++) { |
97e3a6a0 N |
2937 | mdu_disk_info_t disk; |
2938 | disk.number = d; | |
d97572f5 | 2939 | if (md_get_disk_info(fd, &disk) < 0) |
97e3a6a0 N |
2940 | continue; |
2941 | if (disk.major == 0 && disk.minor == 0) | |
2942 | continue; | |
2943 | found++; | |
fc54fe7a JS |
2944 | if ((disk.state & (1 << MD_DISK_ACTIVE)) && |
2945 | disk.raid_disk < data_disks) | |
97e3a6a0 N |
2946 | /* keep this */ |
2947 | continue; | |
2948 | ioctl(fd, SET_DISK_FAULTY, | |
2949 | makedev(disk.major, disk.minor)); | |
1ab9ed2a | 2950 | hot_remove_disk(fd, makedev(disk.major, disk.minor), 1); |
97e3a6a0 N |
2951 | } |
2952 | } | |
2953 | c = map_num(pers, level); | |
2954 | if (c) { | |
2955 | int err = sysfs_set_str(&info, NULL, "level", c); | |
2956 | if (err) { | |
2957 | err = errno; | |
2958 | pr_err("%s: could not set level to %s\n", | |
2959 | devname, c); | |
2960 | if (err == EBUSY && | |
2961 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2962 | cont_err("Bitmap must be removed before level can be changed\n"); |
97e3a6a0 N |
2963 | return err; |
2964 | } | |
2965 | if (verbose >= 0) | |
358ef9bf | 2966 | pr_err("level of %s changed to %s\n", devname, c); |
97e3a6a0 N |
2967 | } |
2968 | return 0; | |
2969 | } | |
2970 | ||
84d11e6c N |
2971 | int sigterm = 0; |
2972 | static void catch_term(int sig) | |
2973 | { | |
2974 | sigterm = 1; | |
2975 | } | |
2976 | ||
b0b67933 N |
2977 | static int continue_via_systemd(char *devnm) |
2978 | { | |
2979 | int skipped, i, pid, status; | |
2980 | char pathbuf[1024]; | |
2981 | /* In a systemd/udev world, it is best to get systemd to | |
2982 | * run "mdadm --grow --continue" rather than running in the | |
2983 | * background. | |
2984 | */ | |
2985 | switch(fork()) { | |
2986 | case 0: | |
2987 | /* FIXME yuk. CLOSE_EXEC?? */ | |
2988 | skipped = 0; | |
2989 | for (i = 3; skipped < 20; i++) | |
2990 | if (close(i) < 0) | |
2991 | skipped++; | |
2992 | else | |
2993 | skipped = 0; | |
2994 | ||
2995 | /* Don't want to see error messages from | |
2996 | * systemctl. If the service doesn't exist, | |
2997 | * we fork ourselves. | |
2998 | */ | |
2999 | close(2); | |
3000 | open("/dev/null", O_WRONLY); | |
358ef9bf JS |
3001 | snprintf(pathbuf, sizeof(pathbuf), |
3002 | "mdadm-grow-continue@%s.service", devnm); | |
3003 | status = execl("/usr/bin/systemctl", "systemctl", "restart", | |
b0b67933 | 3004 | pathbuf, NULL); |
e1b942b9 | 3005 | status = execl("/bin/systemctl", "systemctl", "restart", |
b0b67933 N |
3006 | pathbuf, NULL); |
3007 | exit(1); | |
3008 | case -1: /* Just do it ourselves. */ | |
3009 | break; | |
3010 | default: /* parent - good */ | |
3011 | pid = wait(&status); | |
3012 | if (pid >= 0 && status == 0) | |
3013 | return 1; | |
3014 | } | |
3015 | return 0; | |
3016 | } | |
3017 | ||
5da9ab98 N |
3018 | static int reshape_array(char *container, int fd, char *devname, |
3019 | struct supertype *st, struct mdinfo *info, | |
e2e53a2d | 3020 | int force, struct mddev_dev *devlist, |
19ceb16d | 3021 | unsigned long long data_offset, |
ba728be7 | 3022 | char *backup_file, int verbose, int forked, |
b76b30e0 | 3023 | int restart, int freeze_reshape) |
5da9ab98 N |
3024 | { |
3025 | struct reshape reshape; | |
3026 | int spares_needed; | |
3027 | char *msg; | |
3028 | int orig_level = UnSet; | |
434d167e | 3029 | int odisks; |
1f9b0e28 | 3030 | int delayed; |
7bc71196 | 3031 | |
5da9ab98 N |
3032 | struct mdu_array_info_s array; |
3033 | char *c; | |
e86c9dd6 | 3034 | |
e2e53a2d N |
3035 | struct mddev_dev *dv; |
3036 | int added_disks; | |
3037 | ||
d152f53e JS |
3038 | int *fdlist = NULL; |
3039 | unsigned long long *offsets = NULL; | |
5da9ab98 N |
3040 | int d; |
3041 | int nrdisks; | |
3042 | int err; | |
da8100ca | 3043 | unsigned long blocks; |
5da9ab98 N |
3044 | unsigned long long array_size; |
3045 | int done; | |
cf6ac177 | 3046 | struct mdinfo *sra = NULL; |
13ffbe89 | 3047 | char buf[20]; |
7bc71196 | 3048 | |
9468aeac N |
3049 | /* when reshaping a RAID0, the component_size might be zero. |
3050 | * So try to fix that up. | |
3051 | */ | |
9cd39f01 | 3052 | if (md_get_array_info(fd, &array) != 0) { |
9468aeac N |
3053 | dprintf("Cannot get array information.\n"); |
3054 | goto release; | |
3055 | } | |
3056 | if (array.level == 0 && info->component_size == 0) { | |
3057 | get_dev_size(fd, NULL, &array_size); | |
3058 | info->component_size = array_size / array.raid_disks; | |
3059 | } | |
3060 | ||
ee2429e0 N |
3061 | if (array.level == 10) |
3062 | /* Need space_after info */ | |
3063 | get_space_after(fd, st, info); | |
3064 | ||
3cb2aed2 N |
3065 | if (info->reshape_active) { |
3066 | int new_level = info->new_level; | |
3067 | info->new_level = UnSet; | |
ce4783d3 N |
3068 | if (info->delta_disks > 0) |
3069 | info->array.raid_disks -= info->delta_disks; | |
a73b0081 | 3070 | msg = analyse_change(devname, info, &reshape); |
3cb2aed2 | 3071 | info->new_level = new_level; |
ce4783d3 N |
3072 | if (info->delta_disks > 0) |
3073 | info->array.raid_disks += info->delta_disks; | |
fcdfb814 AK |
3074 | if (!restart) |
3075 | /* Make sure the array isn't read-only */ | |
3076 | ioctl(fd, RESTART_ARRAY_RW, 0); | |
3cb2aed2 | 3077 | } else |
a73b0081 | 3078 | msg = analyse_change(devname, info, &reshape); |
5da9ab98 | 3079 | if (msg) { |
a73b0081 N |
3080 | /* if msg == "", error has already been printed */ |
3081 | if (msg[0]) | |
3082 | pr_err("%s\n", msg); | |
631d7405 | 3083 | goto release; |
5da9ab98 | 3084 | } |
358ef9bf JS |
3085 | if (restart && (reshape.level != info->array.level || |
3086 | reshape.before.layout != info->array.layout || | |
3087 | reshape.before.data_disks + reshape.parity != | |
3088 | info->array.raid_disks - max(0, info->delta_disks))) { | |
7a862a02 | 3089 | pr_err("reshape info is not in native format - cannot continue.\n"); |
20a40eca N |
3090 | goto release; |
3091 | } | |
a93f87ee | 3092 | |
13ffbe89 | 3093 | if (st->ss->external && restart && (info->reshape_progress == 0) && |
358ef9bf JS |
3094 | !((sysfs_get_str(info, NULL, "sync_action", |
3095 | buf, sizeof(buf)) > 0) && | |
13ffbe89 | 3096 | (strncmp(buf, "reshape", 7) == 0))) { |
e1dd332a AK |
3097 | /* When reshape is restarted from '0', very begin of array |
3098 | * it is possible that for external metadata reshape and array | |
3099 | * configuration doesn't happen. | |
3100 | * Check if md has the same opinion, and reshape is restarted | |
3101 | * from 0. If so, this is regular reshape start after reshape | |
3102 | * switch in metadata to next array only. | |
3103 | */ | |
3104 | if ((verify_reshape_position(info, reshape.level) >= 0) && | |
3105 | (info->reshape_progress == 0)) | |
3106 | restart = 0; | |
3107 | } | |
a93f87ee | 3108 | if (restart) { |
358ef9bf JS |
3109 | /* |
3110 | * reshape already started. just skip to monitoring | |
3111 | * the reshape | |
3112 | */ | |
a93f87ee N |
3113 | if (reshape.backup_blocks == 0) |
3114 | return 0; | |
8ecf12b9 N |
3115 | if (restart & RESHAPE_NO_BACKUP) |
3116 | return 0; | |
dfa4d769 N |
3117 | |
3118 | /* Need 'sra' down at 'started:' */ | |
3119 | sra = sysfs_read(fd, NULL, | |
358ef9bf JS |
3120 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE| |
3121 | GET_CHUNK|GET_CACHE); | |
dfa4d769 N |
3122 | if (!sra) { |
3123 | pr_err("%s: Cannot get array details from sysfs\n", | |
3124 | devname); | |
3125 | goto release; | |
3126 | } | |
54ded86f N |
3127 | |
3128 | if (!backup_file) | |
3129 | backup_file = locate_backup(sra->sys_name); | |
3130 | ||
a93f87ee N |
3131 | goto started; |
3132 | } | |
a9c3e78f AK |
3133 | /* The container is frozen but the array may not be. |
3134 | * So freeze the array so spares don't get put to the wrong use | |
3135 | * FIXME there should probably be a cleaner separation between | |
3136 | * freeze_array and freeze_container. | |
3137 | */ | |
3138 | sysfs_freeze_array(info); | |
e06c4e59 | 3139 | /* Check we have enough spares to not be degraded */ |
e2e53a2d N |
3140 | added_disks = 0; |
3141 | for (dv = devlist; dv ; dv=dv->next) | |
3142 | added_disks++; | |
5da9ab98 | 3143 | spares_needed = max(reshape.before.data_disks, |
358ef9bf JS |
3144 | reshape.after.data_disks) + |
3145 | reshape.parity - array.raid_disks; | |
7bc71196 | 3146 | |
358ef9bf | 3147 | if (!force && info->new_level > 1 && info->array.level > 1 && |
e2e53a2d | 3148 | spares_needed > info->array.spare_disks + added_disks) { |
7a862a02 | 3149 | pr_err("Need %d spare%s to avoid degraded array, and only have %d.\n" |
e7b84f9d N |
3150 | " Use --force to over-ride this check.\n", |
3151 | spares_needed, | |
3152 | spares_needed == 1 ? "" : "s", | |
3153 | info->array.spare_disks + added_disks); | |
631d7405 | 3154 | goto release; |
7bc71196 | 3155 | } |
e06c4e59 N |
3156 | /* Check we have enough spares to not fail */ |
3157 | spares_needed = max(reshape.before.data_disks, | |
3158 | reshape.after.data_disks) | |
3159 | - array.raid_disks; | |
3160 | if ((info->new_level > 1 || info->new_level == 0) && | |
e2e53a2d | 3161 | spares_needed > info->array.spare_disks +added_disks) { |
7a862a02 | 3162 | pr_err("Need %d spare%s to create working array, and only have %d.\n", |
358ef9bf | 3163 | spares_needed, spares_needed == 1 ? "" : "s", |
e7b84f9d | 3164 | info->array.spare_disks + added_disks); |
e06c4e59 N |
3165 | goto release; |
3166 | } | |
e86c9dd6 | 3167 | |
eae35f5c | 3168 | if (reshape.level != array.level) { |
97e3a6a0 N |
3169 | int err = impose_level(fd, reshape.level, devname, verbose); |
3170 | if (err) | |
631d7405 | 3171 | goto release; |
97e3a6a0 N |
3172 | info->new_layout = UnSet; /* after level change, |
3173 | * layout is meaningless */ | |
eae35f5c | 3174 | orig_level = array.level; |
3cd4e7c4 | 3175 | sysfs_freeze_array(info); |
e86c9dd6 | 3176 | |
16d4d84e AK |
3177 | if (reshape.level > 0 && st->ss->external) { |
3178 | /* make sure mdmon is aware of the new level */ | |
4dd2df09 | 3179 | if (mdmon_running(container)) |
78340e26 AK |
3180 | flush_mdmon(container); |
3181 | ||
4dd2df09 N |
3182 | if (!mdmon_running(container)) |
3183 | start_mdmon(container); | |
16d4d84e | 3184 | ping_monitor(container); |
358ef9bf | 3185 | if (mdmon_running(container) && st->update_tail == NULL) |
e919fb0a | 3186 | st->update_tail = &st->updates; |
16d4d84e | 3187 | } |
5da9ab98 | 3188 | } |
5da9ab98 N |
3189 | /* ->reshape_super might have chosen some spares from the |
3190 | * container that it wants to be part of the new array. | |
3191 | * We can collect them with ->container_content and give | |
3192 | * them to the kernel. | |
3193 | */ | |
3194 | if (st->ss->reshape_super && st->ss->container_content) { | |
3195 | char *subarray = strchr(info->text_version+1, '/')+1; | |
3196 | struct mdinfo *info2 = | |
3197 | st->ss->container_content(st, subarray); | |
3198 | struct mdinfo *d; | |
3199 | ||
2dd0d697 | 3200 | if (info2) { |
dae13137 | 3201 | if (sysfs_init(info2, fd, st->devnm)) { |
8e5b52cd | 3202 | pr_err("unable to initialize sysfs for %s\n", |
dae13137 JS |
3203 | st->devnm); |
3204 | free(info2); | |
3205 | goto release; | |
3206 | } | |
0d5ac3c6 N |
3207 | /* When increasing number of devices, we need to set |
3208 | * new raid_disks before adding these, or they might | |
3209 | * be rejected. | |
3210 | */ | |
3211 | if (reshape.backup_blocks && | |
358ef9bf JS |
3212 | reshape.after.data_disks > |
3213 | reshape.before.data_disks) | |
0d5ac3c6 N |
3214 | subarray_set_num(container, info2, "raid_disks", |
3215 | reshape.after.data_disks + | |
3216 | reshape.parity); | |
5da9ab98 N |
3217 | for (d = info2->devs; d; d = d->next) { |
3218 | if (d->disk.state == 0 && | |
3219 | d->disk.raid_disk >= 0) { | |
3220 | /* This is a spare that wants to | |
3221 | * be part of the array. | |
3222 | */ | |
3223 | add_disk(fd, st, info2, d); | |
3224 | } | |
9860f271 | 3225 | } |
2dd0d697 AK |
3226 | sysfs_free(info2); |
3227 | } | |
5da9ab98 | 3228 | } |
e2e53a2d N |
3229 | /* We might have been given some devices to add to the |
3230 | * array. Now that the array has been changed to the right | |
3231 | * level and frozen, we can safely add them. | |
3232 | */ | |
31dbeda7 | 3233 | if (devlist) { |
358ef9bf | 3234 | if (Manage_subdevs(devname, fd, devlist, verbose, 0, NULL, 0)) |
31dbeda7 GJ |
3235 | goto release; |
3236 | } | |
1686dc25 | 3237 | |
e09233d0 | 3238 | if (reshape.backup_blocks == 0 && data_offset != INVALID_SECTORS) |
8876bf0b | 3239 | reshape.backup_blocks = reshape.before.data_disks * info->array.chunk_size/512; |
b4f8e38b | 3240 | if (reshape.backup_blocks == 0) { |
5da9ab98 N |
3241 | /* No restriping needed, but we might need to impose |
3242 | * some more changes: layout, raid_disks, chunk_size | |
e86c9dd6 | 3243 | */ |
24aebf3a | 3244 | /* read current array info */ |
9cd39f01 | 3245 | if (md_get_array_info(fd, &array) != 0) { |
83732c28 | 3246 | dprintf("Cannot get array information.\n"); |
24aebf3a KW |
3247 | goto release; |
3248 | } | |
3249 | /* compare current array info with new values and if | |
3250 | * it is different update them to new */ | |
5da9ab98 | 3251 | if (info->new_layout != UnSet && |
24aebf3a KW |
3252 | info->new_layout != array.layout) { |
3253 | array.layout = info->new_layout; | |
018a4882 | 3254 | if (md_set_array_info(fd, &array) != 0) { |
e7b84f9d | 3255 | pr_err("failed to set new layout\n"); |
631d7405 | 3256 | goto release; |
ba728be7 | 3257 | } else if (verbose >= 0) |
5da9ab98 | 3258 | printf("layout for %s set to %d\n", |
24aebf3a | 3259 | devname, array.layout); |
5da9ab98 | 3260 | } |
358ef9bf JS |
3261 | if (info->delta_disks != UnSet && info->delta_disks != 0 && |
3262 | array.raid_disks != | |
3263 | (info->array.raid_disks + info->delta_disks)) { | |
24aebf3a | 3264 | array.raid_disks += info->delta_disks; |
018a4882 | 3265 | if (md_set_array_info(fd, &array) != 0) { |
e7b84f9d | 3266 | pr_err("failed to set raid disks\n"); |
631d7405 | 3267 | goto release; |
ba728be7 | 3268 | } else if (verbose >= 0) { |
5da9ab98 | 3269 | printf("raid_disks for %s set to %d\n", |
24aebf3a KW |
3270 | devname, array.raid_disks); |
3271 | } | |
5da9ab98 N |
3272 | } |
3273 | if (info->new_chunk != 0 && | |
24aebf3a | 3274 | info->new_chunk != array.chunk_size) { |
5da9ab98 N |
3275 | if (sysfs_set_num(info, NULL, |
3276 | "chunk_size", info->new_chunk) != 0) { | |
e7b84f9d | 3277 | pr_err("failed to set chunk size\n"); |
631d7405 | 3278 | goto release; |
ba728be7 | 3279 | } else if (verbose >= 0) |
5da9ab98 | 3280 | printf("chunk size for %s set to %d\n", |
24aebf3a | 3281 | devname, array.chunk_size); |
4725bc31 | 3282 | } |
e35b189b | 3283 | unfreeze(st); |
631d7405 | 3284 | return 0; |
5da9ab98 | 3285 | } |
19678e53 | 3286 | |
5da9ab98 N |
3287 | /* |
3288 | * There are three possibilities. | |
3289 | * 1/ The array will shrink. | |
3290 | * We need to ensure the reshape will pause before reaching | |
3291 | * the 'critical section'. We also need to fork and wait for | |
24daa16f | 3292 | * that to happen. When it does we |
5da9ab98 N |
3293 | * suspend/backup/complete/unfreeze |
3294 | * | |
3295 | * 2/ The array will not change size. | |
3296 | * This requires that we keep a backup of a sliding window | |
3297 | * so that we can restore data after a crash. So we need | |
3298 | * to fork and monitor progress. | |
3299 | * In future we will allow the data_offset to change, so | |
3300 | * a sliding backup becomes unnecessary. | |
3301 | * | |
3302 | * 3/ The array will grow. This is relatively easy. | |
3303 | * However the kernel's restripe routines will cheerfully | |
3304 | * overwrite some early data before it is safe. So we | |
3305 | * need to make a backup of the early parts of the array | |
3306 | * and be ready to restore it if rebuild aborts very early. | |
3307 | * For externally managed metadata, we still need a forked | |
3308 | * child to monitor the reshape and suspend IO over the region | |
3309 | * that is being reshaped. | |
3310 | * | |
3311 | * We backup data by writing it to one spare, or to a | |
3312 | * file which was given on command line. | |
3313 | * | |
3314 | * In each case, we first make sure that storage is available | |
3315 | * for the required backup. | |
3316 | * Then we: | |
3317 | * - request the shape change. | |
3318 | * - fork to handle backup etc. | |
3319 | */ | |
5da9ab98 N |
3320 | /* Check that we can hold all the data */ |
3321 | get_dev_size(fd, NULL, &array_size); | |
3322 | if (reshape.new_size < (array_size/512)) { | |
e7b84f9d N |
3323 | pr_err("this change will reduce the size of the array.\n" |
3324 | " use --grow --array-size first to truncate array.\n" | |
3325 | " e.g. mdadm --grow %s --array-size %llu\n", | |
3326 | devname, reshape.new_size/2); | |
5da9ab98 N |
3327 | goto release; |
3328 | } | |
7236ee7a | 3329 | |
19ceb16d | 3330 | if (array.level == 10) { |
033d0929 | 3331 | /* Reshaping RAID10 does not require any data backup by |
19ceb16d N |
3332 | * user-space. Instead it requires that the data_offset |
3333 | * is changed to avoid the need for backup. | |
3334 | * So this is handled very separately | |
3335 | */ | |
3336 | if (restart) | |
3337 | /* Nothing to do. */ | |
3338 | return 0; | |
3339 | return raid10_reshape(container, fd, devname, st, info, | |
358ef9bf | 3340 | &reshape, data_offset, force, verbose); |
19ceb16d | 3341 | } |
4dd2df09 | 3342 | sra = sysfs_read(fd, NULL, |
3656edcd | 3343 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK| |
5da9ab98 | 3344 | GET_CACHE); |
5da9ab98 | 3345 | if (!sra) { |
e7b84f9d | 3346 | pr_err("%s: Cannot get array details from sysfs\n", |
5da9ab98 | 3347 | devname); |
5da9ab98 N |
3348 | goto release; |
3349 | } | |
7236ee7a | 3350 | |
8192902f | 3351 | if (!backup_file) |
199f1a1f N |
3352 | switch(set_new_data_offset(sra, st, devname, |
3353 | reshape.after.data_disks - reshape.before.data_disks, | |
8192902f | 3354 | data_offset, |
6a23fb9d | 3355 | reshape.min_offset_change, 1)) { |
63c12c89 N |
3356 | case -1: |
3357 | goto release; | |
3358 | case 0: | |
3359 | /* Updated data_offset, so it's easy now */ | |
3360 | update_cache_size(container, sra, info, | |
3361 | min(reshape.before.data_disks, | |
3362 | reshape.after.data_disks), | |
3363 | reshape.backup_blocks); | |
3364 | ||
3365 | /* Right, everything seems fine. Let's kick things off. | |
3366 | */ | |
3367 | sync_metadata(st); | |
3368 | ||
3369 | if (impose_reshape(sra, info, st, fd, restart, | |
3370 | devname, container, &reshape) < 0) | |
3371 | goto release; | |
3372 | if (sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0) { | |
783bbc2b N |
3373 | struct mdinfo *sd; |
3374 | if (errno != EINVAL) { | |
3375 | pr_err("Failed to initiate reshape!\n"); | |
3376 | goto release; | |
3377 | } | |
3378 | /* revert data_offset and try the old way */ | |
3379 | for (sd = sra->devs; sd; sd = sd->next) { | |
3380 | sysfs_set_num(sra, sd, "new_offset", | |
3381 | sd->data_offset); | |
3382 | sysfs_set_str(sra, NULL, "reshape_direction", | |
3383 | "forwards"); | |
3384 | } | |
3385 | break; | |
63c12c89 | 3386 | } |
97e3a6a0 N |
3387 | if (info->new_level == reshape.level) |
3388 | return 0; | |
3389 | /* need to adjust level when reshape completes */ | |
3390 | switch(fork()) { | |
3391 | case -1: /* ignore error, but don't wait */ | |
3392 | return 0; | |
3393 | default: /* parent */ | |
3394 | return 0; | |
3395 | case 0: | |
3396 | map_fork(); | |
3397 | break; | |
3398 | } | |
3377ee42 | 3399 | close(fd); |
97e3a6a0 | 3400 | wait_reshape(sra); |
3377ee42 N |
3401 | fd = open_dev(sra->sys_name); |
3402 | if (fd >= 0) | |
3403 | impose_level(fd, info->new_level, devname, verbose); | |
63c12c89 N |
3404 | return 0; |
3405 | case 1: /* Couldn't set data_offset, try the old way */ | |
3406 | if (data_offset != INVALID_SECTORS) { | |
3407 | pr_err("Cannot update data_offset on this array\n"); | |
3408 | goto release; | |
3409 | } | |
3410 | break; | |
3411 | } | |
3412 | ||
8ecf12b9 | 3413 | started: |
5da9ab98 N |
3414 | /* Decide how many blocks (sectors) for a reshape |
3415 | * unit. The number we have so far is just a minimum | |
3416 | */ | |
b4f8e38b | 3417 | blocks = reshape.backup_blocks; |
24daa16f | 3418 | if (reshape.before.data_disks == |
5da9ab98 N |
3419 | reshape.after.data_disks) { |
3420 | /* Make 'blocks' bigger for better throughput, but | |
3421 | * not so big that we reject it below. | |
3422 | * Try for 16 megabytes | |
3423 | */ | |
358ef9bf | 3424 | while (blocks * 32 < sra->component_size && blocks < 16*1024*2) |
5da9ab98 N |
3425 | blocks *= 2; |
3426 | } else | |
7a862a02 | 3427 | pr_err("Need to backup %luK of critical section..\n", blocks/2); |
5da9ab98 N |
3428 | |
3429 | if (blocks >= sra->component_size/2) { | |
358ef9bf | 3430 | pr_err("%s: Something wrong - reshape aborted\n", devname); |
5da9ab98 N |
3431 | goto release; |
3432 | } | |
7236ee7a | 3433 | |
5da9ab98 N |
3434 | /* Now we need to open all these devices so we can read/write. |
3435 | */ | |
b8b286a6 N |
3436 | nrdisks = max(reshape.before.data_disks, |
3437 | reshape.after.data_disks) + reshape.parity | |
3438 | + sra->array.spare_disks; | |
503975b9 N |
3439 | fdlist = xcalloc((1+nrdisks), sizeof(int)); |
3440 | offsets = xcalloc((1+nrdisks), sizeof(offsets[0])); | |
e380d3be | 3441 | |
b8b286a6 | 3442 | odisks = reshape.before.data_disks + reshape.parity; |
358ef9bf JS |
3443 | d = reshape_prepare_fdlist(devname, sra, odisks, nrdisks, blocks, |
3444 | backup_file, fdlist, offsets); | |
8e7ddc5f | 3445 | if (d < odisks) { |
5da9ab98 N |
3446 | goto release; |
3447 | } | |
13c37ad3 AK |
3448 | if ((st->ss->manage_reshape == NULL) || |
3449 | (st->ss->recover_backup == NULL)) { | |
3450 | if (backup_file == NULL) { | |
3451 | if (reshape.after.data_disks <= | |
3452 | reshape.before.data_disks) { | |
be7c26b4 N |
3453 | pr_err("%s: Cannot grow - need backup-file\n", |
3454 | devname); | |
3455 | pr_err(" Please provide one with \"--backup=...\"\n"); | |
13c37ad3 | 3456 | goto release; |
8e7ddc5f | 3457 | } else if (d == odisks) { |
7a862a02 | 3458 | pr_err("%s: Cannot grow - need a spare or backup-file to backup critical section\n", devname); |
13c37ad3 AK |
3459 | goto release; |
3460 | } | |
3461 | } else { | |
3462 | if (!reshape_open_backup_file(backup_file, fd, devname, | |
3463 | (signed)blocks, | |
3464 | fdlist+d, offsets+d, | |
358ef9bf | 3465 | sra->sys_name, restart)) { |
13c37ad3 AK |
3466 | goto release; |
3467 | } | |
3468 | d++; | |
e86c9dd6 | 3469 | } |
5da9ab98 | 3470 | } |
7236ee7a | 3471 | |
434d167e | 3472 | update_cache_size(container, sra, info, |
358ef9bf JS |
3473 | min(reshape.before.data_disks, |
3474 | reshape.after.data_disks), blocks); | |
5da9ab98 N |
3475 | |
3476 | /* Right, everything seems fine. Let's kick things off. | |
3477 | * If only changing raid_disks, use ioctl, else use | |
3478 | * sysfs. | |
3479 | */ | |
3480 | sync_metadata(st); | |
3481 | ||
77afa056 N |
3482 | if (impose_reshape(sra, info, st, fd, restart, |
3483 | devname, container, &reshape) < 0) | |
3484 | goto release; | |
e86c9dd6 | 3485 | |
27a1e5b5 N |
3486 | err = start_reshape(sra, restart, reshape.before.data_disks, |
3487 | reshape.after.data_disks); | |
fab32c97 | 3488 | if (err) { |
e7b84f9d | 3489 | pr_err("Cannot %s reshape for %s\n", |
358ef9bf | 3490 | restart ? "continue" : "start", devname); |
fab32c97 AK |
3491 | goto release; |
3492 | } | |
a93f87ee N |
3493 | if (restart) |
3494 | sysfs_set_str(sra, NULL, "array_state", "active"); | |
b76b30e0 AK |
3495 | if (freeze_reshape) { |
3496 | free(fdlist); | |
3497 | free(offsets); | |
3498 | sysfs_free(sra); | |
7a862a02 | 3499 | pr_err("Reshape has to be continued from location %llu when root filesystem has been mounted.\n", |
b76b30e0 AK |
3500 | sra->reshape_progress); |
3501 | return 1; | |
3502 | } | |
5da9ab98 | 3503 | |
b0b67933 N |
3504 | if (!forked && !check_env("MDADM_NO_SYSTEMCTL")) |
3505 | if (continue_via_systemd(container ?: sra->sys_name)) { | |
3506 | free(fdlist); | |
3507 | free(offsets); | |
3508 | sysfs_free(sra); | |
3509 | return 0; | |
5e76dce1 | 3510 | } |
5e76dce1 | 3511 | |
5da9ab98 N |
3512 | /* Now we just need to kick off the reshape and watch, while |
3513 | * handling backups of the data... | |
3514 | * This is all done by a forked background process. | |
3515 | */ | |
3516 | switch(forked ? 0 : fork()) { | |
6b2d630c | 3517 | case -1: |
e7b84f9d | 3518 | pr_err("Cannot run child to monitor reshape: %s\n", |
6b2d630c | 3519 | strerror(errno)); |
6b2d630c | 3520 | abort_reshape(sra); |
631d7405 | 3521 | goto release; |
6b2d630c | 3522 | default: |
d152f53e JS |
3523 | free(fdlist); |
3524 | free(offsets); | |
3525 | sysfs_free(sra); | |
6b2d630c | 3526 | return 0; |
5da9ab98 | 3527 | case 0: |
cc700db3 | 3528 | map_fork(); |
6b2d630c N |
3529 | break; |
3530 | } | |
5da9ab98 | 3531 | |
1f9b0e28 N |
3532 | /* If another array on the same devices is busy, the |
3533 | * reshape will wait for them. This would mean that | |
3534 | * the first section that we suspend will stay suspended | |
3535 | * for a long time. So check on that possibility | |
3536 | * by looking for "DELAYED" in /proc/mdstat, and if found, | |
3537 | * wait a while | |
3538 | */ | |
3539 | do { | |
3540 | struct mdstat_ent *mds, *m; | |
3541 | delayed = 0; | |
a7a0d8a1 | 3542 | mds = mdstat_read(1, 0); |
ae0dcfbd | 3543 | for (m = mds; m; m = m->next) |
4dd2df09 | 3544 | if (strcmp(m->devnm, sra->sys_name) == 0) { |
358ef9bf | 3545 | if (m->resync && m->percent == RESYNC_DELAYED) |
1f9b0e28 N |
3546 | delayed = 1; |
3547 | if (m->resync == 0) | |
3548 | /* Haven't started the reshape thread | |
3549 | * yet, wait a bit | |
3550 | */ | |
3551 | delayed = 2; | |
3552 | break; | |
3553 | } | |
3554 | free_mdstat(mds); | |
3555 | if (delayed == 1 && get_linux_version() < 3007000) { | |
3556 | pr_err("Reshape is delayed, but cannot wait carefully with this kernel.\n" | |
3557 | " You might experience problems until other reshapes complete.\n"); | |
3558 | delayed = 0; | |
3559 | } | |
3560 | if (delayed) | |
a7a0d8a1 | 3561 | mdstat_wait(30 - (delayed-1) * 25); |
1f9b0e28 | 3562 | } while (delayed); |
a7a0d8a1 | 3563 | mdstat_close(); |
6b2d630c N |
3564 | close(fd); |
3565 | if (check_env("MDADM_GROW_VERIFY")) | |
3566 | fd = open(devname, O_RDONLY | O_DIRECT); | |
3567 | else | |
3568 | fd = -1; | |
3569 | mlockall(MCL_FUTURE); | |
5da9ab98 | 3570 | |
84d11e6c N |
3571 | signal(SIGTERM, catch_term); |
3572 | ||
6b2d630c N |
3573 | if (st->ss->external) { |
3574 | /* metadata handler takes it from here */ | |
3575 | done = st->ss->manage_reshape( | |
3576 | fd, sra, &reshape, st, blocks, | |
358ef9bf JS |
3577 | fdlist, offsets, d - odisks, fdlist + odisks, |
3578 | offsets + odisks); | |
6b2d630c N |
3579 | } else |
3580 | done = child_monitor( | |
358ef9bf JS |
3581 | fd, sra, &reshape, st, blocks, fdlist, offsets, |
3582 | d - odisks, fdlist + odisks, offsets + odisks); | |
6b2d630c | 3583 | |
d152f53e JS |
3584 | free(fdlist); |
3585 | free(offsets); | |
3586 | ||
54ded86f N |
3587 | if (backup_file && done) { |
3588 | char *bul; | |
54ded86f N |
3589 | bul = make_backup(sra->sys_name); |
3590 | if (bul) { | |
5e76dce1 | 3591 | char buf[1024]; |
9eb5ce5a | 3592 | int l = readlink(bul, buf, sizeof(buf) - 1); |
5e76dce1 N |
3593 | if (l > 0) { |
3594 | buf[l]=0; | |
3595 | unlink(buf); | |
3596 | } | |
54ded86f N |
3597 | unlink(bul); |
3598 | free(bul); | |
3599 | } | |
5e76dce1 | 3600 | unlink(backup_file); |
54ded86f | 3601 | } |
6b2d630c N |
3602 | if (!done) { |
3603 | abort_reshape(sra); | |
3604 | goto out; | |
3605 | } | |
1cbc5680 N |
3606 | |
3607 | if (!st->ss->external && | |
fc54fe7a JS |
3608 | !(reshape.before.data_disks != reshape.after.data_disks && |
3609 | info->custom_array_size) && info->new_level == reshape.level && | |
1cbc5680 N |
3610 | !forked) { |
3611 | /* no need to wait for the reshape to finish as | |
3612 | * there is nothing more to do. | |
3613 | */ | |
d152f53e | 3614 | sysfs_free(sra); |
1cbc5680 N |
3615 | exit(0); |
3616 | } | |
3617 | wait_reshape(sra); | |
3618 | ||
3619 | if (st->ss->external) { | |
3620 | /* Re-load the metadata as much could have changed */ | |
4dd2df09 | 3621 | int cfd = open_dev(st->container_devnm); |
1cbc5680 | 3622 | if (cfd >= 0) { |
78340e26 | 3623 | flush_mdmon(container); |
1cbc5680 N |
3624 | st->ss->free_super(st); |
3625 | st->ss->load_container(st, cfd, container); | |
3626 | close(cfd); | |
3627 | } | |
3628 | } | |
3629 | ||
6b2d630c N |
3630 | /* set new array size if required customer_array_size is used |
3631 | * by this metadata. | |
3632 | */ | |
358ef9bf | 3633 | if (reshape.before.data_disks != reshape.after.data_disks && |
54397ed9 AK |
3634 | info->custom_array_size) |
3635 | set_array_size(st, info, info->text_version); | |
582496b2 | 3636 | |
6b2d630c | 3637 | if (info->new_level != reshape.level) { |
97e3a6a0 N |
3638 | if (fd < 0) |
3639 | fd = open(devname, O_RDONLY); | |
3640 | impose_level(fd, info->new_level, devname, verbose); | |
3641 | close(fd); | |
e919fb0a AK |
3642 | if (info->new_level == 0) |
3643 | st->update_tail = NULL; | |
7236ee7a | 3644 | } |
6b2d630c | 3645 | out: |
d152f53e | 3646 | sysfs_free(sra); |
6b2d630c N |
3647 | if (forked) |
3648 | return 0; | |
e84f2c00 | 3649 | unfreeze(st); |
6b2d630c | 3650 | exit(0); |
e86c9dd6 | 3651 | |
6b2d630c | 3652 | release: |
d152f53e JS |
3653 | free(fdlist); |
3654 | free(offsets); | |
1cbc5680 | 3655 | if (orig_level != UnSet && sra) { |
7236ee7a N |
3656 | c = map_num(pers, orig_level); |
3657 | if (c && sysfs_set_str(sra, NULL, "level", c) == 0) | |
e7b84f9d | 3658 | pr_err("aborting level change\n"); |
7236ee7a | 3659 | } |
d152f53e | 3660 | sysfs_free(sra); |
9202b8eb N |
3661 | if (!forked) |
3662 | unfreeze(st); | |
631d7405 | 3663 | return 1; |
7236ee7a | 3664 | } |
e86c9dd6 | 3665 | |
9ad6f6e6 AK |
3666 | /* mdfd handle is passed to be closed in child process (after fork). |
3667 | */ | |
493f5dd6 | 3668 | int reshape_container(char *container, char *devname, |
9ad6f6e6 | 3669 | int mdfd, |
24daa16f | 3670 | struct supertype *st, |
5da9ab98 N |
3671 | struct mdinfo *info, |
3672 | int force, | |
b0140ae8 N |
3673 | char *backup_file, int verbose, |
3674 | int forked, int restart, int freeze_reshape) | |
5da9ab98 | 3675 | { |
1bb174ba | 3676 | struct mdinfo *cc = NULL; |
bcc9e9ed | 3677 | int rv = restart; |
4dd2df09 | 3678 | char last_devnm[32] = ""; |
1bb174ba | 3679 | |
d8eb27f7 | 3680 | /* component_size is not meaningful for a container, |
7ec0996c | 3681 | * so pass '0' meaning 'no change' |
d8eb27f7 | 3682 | */ |
493f5dd6 | 3683 | if (!restart && |
7ec0996c | 3684 | reshape_super(st, 0, info->new_level, |
5da9ab98 | 3685 | info->new_layout, info->new_chunk, |
41784c88 | 3686 | info->array.raid_disks, info->delta_disks, |
016e00f5 | 3687 | backup_file, devname, APPLY_METADATA_CHANGES, |
ba728be7 | 3688 | verbose)) { |
9e325442 | 3689 | unfreeze(st); |
5da9ab98 | 3690 | return 1; |
9e325442 | 3691 | } |
5da9ab98 N |
3692 | |
3693 | sync_metadata(st); | |
3694 | ||
1bb174ba AK |
3695 | /* ping monitor to be sure that update is on disk |
3696 | */ | |
3697 | ping_monitor(container); | |
5da9ab98 | 3698 | |
40b941b8 | 3699 | if (!forked && !freeze_reshape && !check_env("MDADM_NO_SYSTEMCTL")) |
4e0eb0db N |
3700 | if (continue_via_systemd(container)) |
3701 | return 0; | |
3702 | ||
b0140ae8 | 3703 | switch (forked ? 0 : fork()) { |
5da9ab98 N |
3704 | case -1: /* error */ |
3705 | perror("Cannot fork to complete reshape\n"); | |
9e325442 | 3706 | unfreeze(st); |
5da9ab98 N |
3707 | return 1; |
3708 | default: /* parent */ | |
b76b30e0 | 3709 | if (!freeze_reshape) |
7a862a02 | 3710 | printf("%s: multi-array reshape continues in background\n", Name); |
5da9ab98 N |
3711 | return 0; |
3712 | case 0: /* child */ | |
cc700db3 | 3713 | map_fork(); |
5da9ab98 N |
3714 | break; |
3715 | } | |
3716 | ||
9ad6f6e6 AK |
3717 | /* close unused handle in child process |
3718 | */ | |
3719 | if (mdfd > -1) | |
3720 | close(mdfd); | |
3721 | ||
1bb174ba AK |
3722 | while(1) { |
3723 | /* For each member array with reshape_active, | |
3724 | * we need to perform the reshape. | |
3725 | * We pick the first array that needs reshaping and | |
3726 | * reshape it. reshape_array() will re-read the metadata | |
3727 | * so the next time through a different array should be | |
3728 | * ready for reshape. | |
493f5dd6 N |
3729 | * It is possible that the 'different' array will not |
3730 | * be assembled yet. In that case we simple exit. | |
3731 | * When it is assembled, the mdadm which assembles it | |
3732 | * will take over the reshape. | |
1bb174ba AK |
3733 | */ |
3734 | struct mdinfo *content; | |
5da9ab98 N |
3735 | int fd; |
3736 | struct mdstat_ent *mdstat; | |
5da9ab98 | 3737 | char *adev; |
13db17bd | 3738 | dev_t devid; |
5da9ab98 | 3739 | |
1bb174ba | 3740 | sysfs_free(cc); |
5da9ab98 | 3741 | |
1bb174ba AK |
3742 | cc = st->ss->container_content(st, NULL); |
3743 | ||
3744 | for (content = cc; content ; content = content->next) { | |
3745 | char *subarray; | |
3746 | if (!content->reshape_active) | |
3747 | continue; | |
3748 | ||
3749 | subarray = strchr(content->text_version+1, '/')+1; | |
4dd2df09 | 3750 | mdstat = mdstat_by_subdev(subarray, container); |
1bb174ba AK |
3751 | if (!mdstat) |
3752 | continue; | |
1ca90aa6 | 3753 | if (mdstat->active == 0) { |
4dd2df09 N |
3754 | pr_err("Skipping inactive array %s.\n", |
3755 | mdstat->devnm); | |
1ca90aa6 AK |
3756 | free_mdstat(mdstat); |
3757 | mdstat = NULL; | |
3758 | continue; | |
3759 | } | |
1bb174ba AK |
3760 | break; |
3761 | } | |
3762 | if (!content) | |
3763 | break; | |
5da9ab98 | 3764 | |
4dd2df09 N |
3765 | devid = devnm2devid(mdstat->devnm); |
3766 | adev = map_dev(major(devid), minor(devid), 0); | |
5da9ab98 | 3767 | if (!adev) |
1bb174ba AK |
3768 | adev = content->text_version; |
3769 | ||
4dd2df09 | 3770 | fd = open_dev(mdstat->devnm); |
97a3490c | 3771 | if (fd < 0) { |
358ef9bf JS |
3772 | pr_err("Device %s cannot be opened for reshape.\n", |
3773 | adev); | |
97a3490c AK |
3774 | break; |
3775 | } | |
3776 | ||
4dd2df09 | 3777 | if (strcmp(last_devnm, mdstat->devnm) == 0) { |
2d04d7e5 AK |
3778 | /* Do not allow for multiple reshape_array() calls for |
3779 | * the same array. | |
3780 | * It can happen when reshape_array() returns without | |
3781 | * error, when reshape is not finished (wrong reshape | |
3782 | * starting/continuation conditions). Mdmon doesn't | |
3783 | * switch to next array in container and reentry | |
3784 | * conditions for the same array occur. | |
3785 | * This is possibly interim until the behaviour of | |
3786 | * reshape_array is resolved(). | |
3787 | */ | |
7a862a02 | 3788 | printf("%s: Multiple reshape execution detected for device %s.\n", Name, adev); |
2d04d7e5 AK |
3789 | close(fd); |
3790 | break; | |
3791 | } | |
4dd2df09 | 3792 | strcpy(last_devnm, mdstat->devnm); |
2d04d7e5 | 3793 | |
dae13137 JS |
3794 | if (sysfs_init(content, fd, mdstat->devnm)) { |
3795 | pr_err("Unable to initialize sysfs for %s\n", | |
3796 | mdstat->devnm); | |
3797 | rv = 1; | |
3798 | break; | |
3799 | } | |
5da9ab98 | 3800 | |
4dd2df09 | 3801 | if (mdmon_running(container)) |
78340e26 AK |
3802 | flush_mdmon(container); |
3803 | ||
1bb174ba | 3804 | rv = reshape_array(container, fd, adev, st, |
ca36d707 | 3805 | content, force, NULL, INVALID_SECTORS, |
ba728be7 | 3806 | backup_file, verbose, 1, restart, |
b76b30e0 | 3807 | freeze_reshape); |
5da9ab98 | 3808 | close(fd); |
b76b30e0 AK |
3809 | |
3810 | if (freeze_reshape) { | |
3811 | sysfs_free(cc); | |
3812 | exit(0); | |
3813 | } | |
3814 | ||
493f5dd6 | 3815 | restart = 0; |
5da9ab98 N |
3816 | if (rv) |
3817 | break; | |
78340e26 | 3818 | |
4dd2df09 | 3819 | if (mdmon_running(container)) |
78340e26 | 3820 | flush_mdmon(container); |
5da9ab98 | 3821 | } |
bcc9e9ed AK |
3822 | if (!rv) |
3823 | unfreeze(st); | |
1bb174ba | 3824 | sysfs_free(cc); |
5da9ab98 N |
3825 | exit(0); |
3826 | } | |
3827 | ||
7236ee7a N |
3828 | /* |
3829 | * We run a child process in the background which performs the following | |
3830 | * steps: | |
3831 | * - wait for resync to reach a certain point | |
3832 | * - suspend io to the following section | |
3833 | * - backup that section | |
3834 | * - allow resync to proceed further | |
3835 | * - resume io | |
3836 | * - discard the backup. | |
3837 | * | |
3838 | * When are combined in slightly different ways in the three cases. | |
3839 | * Grow: | |
3840 | * - suspend/backup/allow/wait/resume/discard | |
3841 | * Shrink: | |
3842 | * - allow/wait/suspend/backup/allow/wait/resume/discard | |
3843 | * same-size: | |
3844 | * - wait/resume/discard/suspend/backup/allow | |
3845 | * | |
3846 | * suspend/backup/allow always come together | |
3847 | * wait/resume/discard do too. | |
3848 | * For the same-size case we have two backups to improve flow. | |
24daa16f | 3849 | * |
7236ee7a | 3850 | */ |
e86c9dd6 | 3851 | |
7443ee81 N |
3852 | int progress_reshape(struct mdinfo *info, struct reshape *reshape, |
3853 | unsigned long long backup_point, | |
3854 | unsigned long long wait_point, | |
3855 | unsigned long long *suspend_point, | |
a6b2d86c | 3856 | unsigned long long *reshape_completed, int *frozen) |
7443ee81 N |
3857 | { |
3858 | /* This function is called repeatedly by the reshape manager. | |
3859 | * It determines how much progress can safely be made and allows | |
3860 | * that progress. | |
3861 | * - 'info' identifies the array and particularly records in | |
3862 | * ->reshape_progress the metadata's knowledge of progress | |
3863 | * This is a sector offset from the start of the array | |
3864 | * of the next array block to be relocated. This number | |
3865 | * may increase from 0 or decrease from array_size, depending | |
3866 | * on the type of reshape that is happening. | |
3867 | * Note that in contrast, 'sync_completed' is a block count of the | |
3868 | * reshape so far. It gives the distance between the start point | |
3869 | * (head or tail of device) and the next place that data will be | |
3870 | * written. It always increases. | |
3871 | * - 'reshape' is the structure created by analyse_change | |
3872 | * - 'backup_point' shows how much the metadata manager has backed-up | |
3873 | * data. For reshapes with increasing progress, it is the next address | |
3874 | * to be backed up, previous addresses have been backed-up. For | |
3875 | * decreasing progress, it is the earliest address that has been | |
3876 | * backed up - later address are also backed up. | |
3877 | * So addresses between reshape_progress and backup_point are | |
3878 | * backed up providing those are in the 'correct' order. | |
3879 | * - 'wait_point' is an array address. When reshape_completed | |
3880 | * passes this point, progress_reshape should return. It might | |
3881 | * return earlier if it determines that ->reshape_progress needs | |
3882 | * to be updated or further backup is needed. | |
3883 | * - suspend_point is maintained by progress_reshape and the caller | |
3884 | * should not touch it except to initialise to zero. | |
3885 | * It is an array address and it only increases in 2.6.37 and earlier. | |
b6b95155 | 3886 | * This makes it difficult to handle reducing reshapes with |
7443ee81 N |
3887 | * external metadata. |
3888 | * However: it is similar to backup_point in that it records the | |
3889 | * other end of a suspended region from reshape_progress. | |
3890 | * it is moved to extend the region that is safe to backup and/or | |
3891 | * reshape | |
3892 | * - reshape_completed is read from sysfs and returned. The caller | |
3893 | * should copy this into ->reshape_progress when it has reason to | |
3894 | * believe that the metadata knows this, and any backup outside this | |
3895 | * has been erased. | |
3896 | * | |
3897 | * Return value is: | |
3898 | * 1 if more data from backup_point - but only as far as suspend_point, | |
3899 | * should be backed up | |
3900 | * 0 if things are progressing smoothly | |
9e034f70 N |
3901 | * -1 if the reshape is finished because it is all done, |
3902 | * -2 if the reshape is finished due to an error. | |
7443ee81 N |
3903 | */ |
3904 | ||
3905 | int advancing = (reshape->after.data_disks | |
3906 | >= reshape->before.data_disks); | |
38dad34a N |
3907 | unsigned long long need_backup; /* All data between start of array and |
3908 | * here will at some point need to | |
3909 | * be backed up. | |
d0ab945e | 3910 | */ |
7443ee81 | 3911 | unsigned long long read_offset, write_offset; |
b4f8e38b | 3912 | unsigned long long write_range; |
7443ee81 | 3913 | unsigned long long max_progress, target, completed; |
d0ab945e N |
3914 | unsigned long long array_size = (info->component_size |
3915 | * reshape->before.data_disks); | |
7443ee81 | 3916 | int fd; |
77a73a17 | 3917 | char buf[20]; |
7443ee81 N |
3918 | |
3919 | /* First, we unsuspend any region that is now known to be safe. | |
3920 | * If suspend_point is on the 'wrong' side of reshape_progress, then | |
3921 | * we don't have or need suspension at the moment. This is true for | |
3922 | * native metadata when we don't need to back-up. | |
3923 | */ | |
3924 | if (advancing) { | |
49cd738b | 3925 | if (info->reshape_progress <= *suspend_point) |
7443ee81 N |
3926 | sysfs_set_num(info, NULL, "suspend_lo", |
3927 | info->reshape_progress); | |
3928 | } else { | |
3929 | /* Note: this won't work in 2.6.37 and before. | |
3930 | * Something somewhere should make sure we don't need it! | |
3931 | */ | |
49cd738b | 3932 | if (info->reshape_progress >= *suspend_point) |
7443ee81 N |
3933 | sysfs_set_num(info, NULL, "suspend_hi", |
3934 | info->reshape_progress); | |
3935 | } | |
3936 | ||
3937 | /* Now work out how far it is safe to progress. | |
3938 | * If the read_offset for ->reshape_progress is less than | |
3939 | * 'blocks' beyond the write_offset, we can only progress as far | |
3940 | * as a backup. | |
3941 | * Otherwise we can progress until the write_offset for the new location | |
3942 | * reaches (within 'blocks' of) the read_offset at the current location. | |
3943 | * However that region must be suspended unless we are using native | |
3944 | * metadata. | |
3945 | * If we need to suspend more, we limit it to 128M per device, which is | |
3946 | * rather arbitrary and should be some time-based calculation. | |
3947 | */ | |
ec757320 N |
3948 | read_offset = info->reshape_progress / reshape->before.data_disks; |
3949 | write_offset = info->reshape_progress / reshape->after.data_disks; | |
b4f8e38b | 3950 | write_range = info->new_chunk/512; |
38dad34a N |
3951 | if (reshape->before.data_disks == reshape->after.data_disks) |
3952 | need_backup = array_size; | |
3953 | else | |
3954 | need_backup = reshape->backup_blocks; | |
7443ee81 | 3955 | if (advancing) { |
38dad34a | 3956 | if (read_offset < write_offset + write_range) |
7443ee81 | 3957 | max_progress = backup_point; |
ddee071d | 3958 | else |
7443ee81 | 3959 | max_progress = |
358ef9bf | 3960 | read_offset * reshape->after.data_disks; |
7443ee81 | 3961 | } else { |
38dad34a N |
3962 | if (read_offset > write_offset - write_range) |
3963 | /* Can only progress as far as has been backed up, | |
3964 | * which must be suspended */ | |
7443ee81 | 3965 | max_progress = backup_point; |
38dad34a N |
3966 | else if (info->reshape_progress <= need_backup) |
3967 | max_progress = backup_point; | |
3968 | else { | |
3969 | if (info->array.major_version >= 0) | |
3970 | /* Can progress until backup is needed */ | |
3971 | max_progress = need_backup; | |
3972 | else { | |
3973 | /* Can progress until metadata update is required */ | |
3974 | max_progress = | |
358ef9bf | 3975 | read_offset * reshape->after.data_disks; |
38dad34a N |
3976 | /* but data must be suspended */ |
3977 | if (max_progress < *suspend_point) | |
3978 | max_progress = *suspend_point; | |
3979 | } | |
7443ee81 N |
3980 | } |
3981 | } | |
3982 | ||
3983 | /* We know it is safe to progress to 'max_progress' providing | |
3984 | * it is suspended or we are using native metadata. | |
3985 | * Consider extending suspend_point 128M per device if it | |
3986 | * is less than 64M per device beyond reshape_progress. | |
3987 | * But always do a multiple of 'blocks' | |
832b2b9a N |
3988 | * FIXME this is too big - it takes to long to complete |
3989 | * this much. | |
7443ee81 N |
3990 | */ |
3991 | target = 64*1024*2 * min(reshape->before.data_disks, | |
24daa16f | 3992 | reshape->after.data_disks); |
b4f8e38b | 3993 | target /= reshape->backup_blocks; |
7443ee81 N |
3994 | if (target < 2) |
3995 | target = 2; | |
b4f8e38b | 3996 | target *= reshape->backup_blocks; |
7443ee81 N |
3997 | |
3998 | /* For externally managed metadata we always need to suspend IO to | |
3999 | * the area being reshaped so we regularly push suspend_point forward. | |
4000 | * For native metadata we only need the suspend if we are going to do | |
4001 | * a backup. | |
4002 | */ | |
4003 | if (advancing) { | |
d7be7d87 JS |
4004 | if ((need_backup > info->reshape_progress || |
4005 | info->array.major_version < 0) && | |
7443ee81 | 4006 | *suspend_point < info->reshape_progress + target) { |
d0ab945e N |
4007 | if (need_backup < *suspend_point + 2 * target) |
4008 | *suspend_point = need_backup; | |
4009 | else if (*suspend_point + 2 * target < array_size) | |
7443ee81 | 4010 | *suspend_point += 2 * target; |
d0ab945e N |
4011 | else |
4012 | *suspend_point = array_size; | |
7443ee81 | 4013 | sysfs_set_num(info, NULL, "suspend_hi", *suspend_point); |
d0ab945e N |
4014 | if (max_progress > *suspend_point) |
4015 | max_progress = *suspend_point; | |
7443ee81 N |
4016 | } |
4017 | } else { | |
38dad34a N |
4018 | if (info->array.major_version >= 0) { |
4019 | /* Only need to suspend when about to backup */ | |
4020 | if (info->reshape_progress < need_backup * 2 && | |
4021 | *suspend_point > 0) { | |
d0ab945e | 4022 | *suspend_point = 0; |
38dad34a | 4023 | sysfs_set_num(info, NULL, "suspend_lo", 0); |
358ef9bf JS |
4024 | sysfs_set_num(info, NULL, "suspend_hi", |
4025 | need_backup); | |
38dad34a N |
4026 | } |
4027 | } else { | |
4028 | /* Need to suspend continually */ | |
4029 | if (info->reshape_progress < *suspend_point) | |
4030 | *suspend_point = info->reshape_progress; | |
4031 | if (*suspend_point + target < info->reshape_progress) | |
4032 | /* No need to move suspend region yet */; | |
4033 | else { | |
4034 | if (*suspend_point >= 2 * target) | |
4035 | *suspend_point -= 2 * target; | |
4036 | else | |
4037 | *suspend_point = 0; | |
4038 | sysfs_set_num(info, NULL, "suspend_lo", | |
4039 | *suspend_point); | |
4040 | } | |
d0ab945e N |
4041 | if (max_progress < *suspend_point) |
4042 | max_progress = *suspend_point; | |
7443ee81 N |
4043 | } |
4044 | } | |
4045 | ||
4046 | /* now set sync_max to allow that progress. sync_max, like | |
4047 | * sync_completed is a count of sectors written per device, so | |
4048 | * we find the difference between max_progress and the start point, | |
4049 | * and divide that by after.data_disks to get a sync_max | |
4050 | * number. | |
4051 | * At the same time we convert wait_point to a similar number | |
4052 | * for comparing against sync_completed. | |
4053 | */ | |
92d1991f | 4054 | /* scale down max_progress to per_disk */ |
7443ee81 | 4055 | max_progress /= reshape->after.data_disks; |
358ef9bf JS |
4056 | /* |
4057 | * Round to chunk size as some kernels give an erroneously | |
4058 | * high number | |
4059 | */ | |
92d1991f N |
4060 | max_progress /= info->new_chunk/512; |
4061 | max_progress *= info->new_chunk/512; | |
7f913e9b N |
4062 | /* And round to old chunk size as the kernel wants that */ |
4063 | max_progress /= info->array.chunk_size/512; | |
4064 | max_progress *= info->array.chunk_size/512; | |
92d1991f N |
4065 | /* Limit progress to the whole device */ |
4066 | if (max_progress > info->component_size) | |
4067 | max_progress = info->component_size; | |
7443ee81 | 4068 | wait_point /= reshape->after.data_disks; |
92d1991f N |
4069 | if (!advancing) { |
4070 | /* switch from 'device offset' to 'processed block count' */ | |
4071 | max_progress = info->component_size - max_progress; | |
4072 | wait_point = info->component_size - wait_point; | |
4073 | } | |
7443ee81 | 4074 | |
a6b2d86c N |
4075 | if (!*frozen) |
4076 | sysfs_set_num(info, NULL, "sync_max", max_progress); | |
7443ee81 N |
4077 | |
4078 | /* Now wait. If we have already reached the point that we were | |
4079 | * asked to wait to, don't wait at all, else wait for any change. | |
4080 | * We need to select on 'sync_completed' as that is the place that | |
4081 | * notifications happen, but we are really interested in | |
4082 | * 'reshape_position' | |
4083 | */ | |
4084 | fd = sysfs_get_fd(info, NULL, "sync_completed"); | |
4085 | if (fd < 0) | |
77a73a17 | 4086 | goto check_progress; |
7443ee81 | 4087 | |
621ea11b | 4088 | if (sysfs_fd_get_ll(fd, &completed) < 0) |
77a73a17 | 4089 | goto check_progress; |
621ea11b | 4090 | |
7443ee81 N |
4091 | while (completed < max_progress && completed < wait_point) { |
4092 | /* Check that sync_action is still 'reshape' to avoid | |
4093 | * waiting forever on a dead array | |
4094 | */ | |
4095 | char action[20]; | |
358ef9bf | 4096 | if (sysfs_get_str(info, NULL, "sync_action", action, 20) <= 0 || |
7443ee81 N |
4097 | strncmp(action, "reshape", 7) != 0) |
4098 | break; | |
26d6e157 AK |
4099 | /* Some kernels reset 'sync_completed' to zero |
4100 | * before setting 'sync_action' to 'idle'. | |
4101 | * So we need these extra tests. | |
4102 | */ | |
fc54fe7a JS |
4103 | if (completed == 0 && advancing && |
4104 | strncmp(action, "idle", 4) == 0 && | |
4105 | info->reshape_progress > 0) | |
26d6e157 | 4106 | break; |
fc54fe7a JS |
4107 | if (completed == 0 && !advancing && |
4108 | strncmp(action, "idle", 4) == 0 && | |
358ef9bf JS |
4109 | info->reshape_progress < |
4110 | (info->component_size * reshape->after.data_disks)) | |
26d6e157 | 4111 | break; |
efc67e8e | 4112 | sysfs_wait(fd, NULL); |
621ea11b | 4113 | if (sysfs_fd_get_ll(fd, &completed) < 0) |
77a73a17 | 4114 | goto check_progress; |
7443ee81 | 4115 | } |
10d0d365 | 4116 | /* Some kernels reset 'sync_completed' to zero, |
e0184a0c | 4117 | * we need to have real point we are in md. |
e0cc1c8d | 4118 | * So in that case, read 'reshape_position' from sysfs. |
10d0d365 | 4119 | */ |
e0184a0c | 4120 | if (completed == 0) { |
e0cc1c8d | 4121 | unsigned long long reshapep; |
e0184a0c | 4122 | char action[20]; |
358ef9bf | 4123 | if (sysfs_get_str(info, NULL, "sync_action", action, 20) > 0 && |
e0cc1c8d N |
4124 | strncmp(action, "idle", 4) == 0 && |
4125 | sysfs_get_ll(info, NULL, | |
4126 | "reshape_position", &reshapep) == 0) | |
4127 | *reshape_completed = reshapep; | |
4128 | } else { | |
4129 | /* some kernels can give an incorrectly high | |
4130 | * 'completed' number, so round down */ | |
4131 | completed /= (info->new_chunk/512); | |
4132 | completed *= (info->new_chunk/512); | |
4133 | /* Convert 'completed' back in to a 'progress' number */ | |
4134 | completed *= reshape->after.data_disks; | |
4135 | if (!advancing) | |
4136 | completed = (info->component_size | |
4137 | * reshape->after.data_disks | |
4138 | - completed); | |
4139 | *reshape_completed = completed; | |
7443ee81 | 4140 | } |
24daa16f | 4141 | |
7443ee81 N |
4142 | close(fd); |
4143 | ||
4144 | /* We return the need_backup flag. Caller will decide | |
d0ab945e | 4145 | * how much - a multiple of ->backup_blocks up to *suspend_point |
7443ee81 | 4146 | */ |
38dad34a N |
4147 | if (advancing) |
4148 | return need_backup > info->reshape_progress; | |
4149 | else | |
4150 | return need_backup >= info->reshape_progress; | |
77a73a17 N |
4151 | |
4152 | check_progress: | |
4153 | /* if we couldn't read a number from sync_completed, then | |
4154 | * either the reshape did complete, or it aborted. | |
4155 | * We can tell which by checking for 'none' in reshape_position. | |
621ea11b N |
4156 | * If it did abort, then it might immediately restart if it |
4157 | * it was just a device failure that leaves us degraded but | |
4158 | * functioning. | |
77a73a17 | 4159 | */ |
d7be7d87 | 4160 | if (sysfs_get_str(info, NULL, "reshape_position", buf, |
358ef9bf | 4161 | sizeof(buf)) < 0 || strncmp(buf, "none", 4) != 0) { |
621ea11b N |
4162 | /* The abort might only be temporary. Wait up to 10 |
4163 | * seconds for fd to contain a valid number again. | |
4164 | */ | |
efc67e8e | 4165 | int wait = 10000; |
621ea11b | 4166 | int rv = -2; |
a6b2d86c | 4167 | unsigned long long new_sync_max; |
efc67e8e N |
4168 | while (fd >= 0 && rv < 0 && wait > 0) { |
4169 | if (sysfs_wait(fd, &wait) != 1) | |
621ea11b | 4170 | break; |
6560987b N |
4171 | switch (sysfs_fd_get_ll(fd, &completed)) { |
4172 | case 0: | |
621ea11b N |
4173 | /* all good again */ |
4174 | rv = 1; | |
a6b2d86c N |
4175 | /* If "sync_max" is no longer max_progress |
4176 | * we need to freeze things | |
4177 | */ | |
358ef9bf JS |
4178 | sysfs_get_ll(info, NULL, "sync_max", |
4179 | &new_sync_max); | |
a6b2d86c | 4180 | *frozen = (new_sync_max != max_progress); |
6560987b N |
4181 | break; |
4182 | case -2: /* read error - abort */ | |
efc67e8e | 4183 | wait = 0; |
6560987b N |
4184 | break; |
4185 | } | |
621ea11b N |
4186 | } |
4187 | if (fd >= 0) | |
4188 | close(fd); | |
4189 | return rv; /* abort */ | |
4190 | } else { | |
6d5316f6 | 4191 | /* Maybe racing with array shutdown - check state */ |
621ea11b N |
4192 | if (fd >= 0) |
4193 | close(fd); | |
d7be7d87 JS |
4194 | if (sysfs_get_str(info, NULL, "array_state", buf, |
4195 | sizeof(buf)) < 0 || | |
4196 | strncmp(buf, "inactive", 8) == 0 || | |
4197 | strncmp(buf, "clear",5) == 0) | |
6d5316f6 | 4198 | return -2; /* abort */ |
77a73a17 | 4199 | return -1; /* complete */ |
6d5316f6 | 4200 | } |
7443ee81 N |
4201 | } |
4202 | ||
fcf57625 | 4203 | /* FIXME return status is never checked */ |
4411fb17 | 4204 | static int grow_backup(struct mdinfo *sra, |
7236ee7a | 4205 | unsigned long long offset, /* per device */ |
7443ee81 | 4206 | unsigned long stripes, /* per device, in old chunks */ |
7236ee7a N |
4207 | int *sources, unsigned long long *offsets, |
4208 | int disks, int chunk, int level, int layout, | |
4209 | int dests, int *destfd, unsigned long long *destoffsets, | |
d4445387 | 4210 | int part, int *degraded, |
7236ee7a N |
4211 | char *buf) |
4212 | { | |
4213 | /* Backup 'blocks' sectors at 'offset' on each device of the array, | |
4214 | * to storage 'destfd' (offset 'destoffsets'), after first | |
4215 | * suspending IO. Then allow resync to continue | |
4216 | * over the suspended section. | |
4217 | * Use part 'part' of the backup-super-block. | |
4218 | */ | |
4219 | int odata = disks; | |
4220 | int rv = 0; | |
4221 | int i; | |
f21e18ca N |
4222 | unsigned long long ll; |
4223 | int new_degraded; | |
7236ee7a N |
4224 | //printf("offset %llu\n", offset); |
4225 | if (level >= 4) | |
4226 | odata--; | |
4227 | if (level == 6) | |
4228 | odata--; | |
7443ee81 | 4229 | |
d4445387 | 4230 | /* Check that array hasn't become degraded, else we might backup the wrong data */ |
2c6ac128 N |
4231 | if (sysfs_get_ll(sra, NULL, "degraded", &ll) < 0) |
4232 | return -1; /* FIXME this error is ignored */ | |
f21e18ca | 4233 | new_degraded = (int)ll; |
d4445387 N |
4234 | if (new_degraded != *degraded) { |
4235 | /* check each device to ensure it is still working */ | |
4236 | struct mdinfo *sd; | |
4237 | for (sd = sra->devs ; sd ; sd = sd->next) { | |
4238 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
4239 | continue; | |
4240 | if (sd->disk.state & (1<<MD_DISK_SYNC)) { | |
cf52eff5 TM |
4241 | char sbuf[100]; |
4242 | ||
4243 | if (sysfs_get_str(sra, sd, "state", | |
4244 | sbuf, sizeof(sbuf)) < 0 || | |
d4445387 N |
4245 | strstr(sbuf, "faulty") || |
4246 | strstr(sbuf, "in_sync") == NULL) { | |
4247 | /* this device is dead */ | |
4248 | sd->disk.state = (1<<MD_DISK_FAULTY); | |
4249 | if (sd->disk.raid_disk >= 0 && | |
4250 | sources[sd->disk.raid_disk] >= 0) { | |
4251 | close(sources[sd->disk.raid_disk]); | |
4252 | sources[sd->disk.raid_disk] = -1; | |
4253 | } | |
4254 | } | |
4255 | } | |
4256 | } | |
4257 | *degraded = new_degraded; | |
4258 | } | |
7236ee7a N |
4259 | if (part) { |
4260 | bsb.arraystart2 = __cpu_to_le64(offset * odata); | |
200871ad | 4261 | bsb.length2 = __cpu_to_le64(stripes * (chunk/512) * odata); |
7236ee7a N |
4262 | } else { |
4263 | bsb.arraystart = __cpu_to_le64(offset * odata); | |
200871ad | 4264 | bsb.length = __cpu_to_le64(stripes * (chunk/512) * odata); |
7236ee7a N |
4265 | } |
4266 | if (part) | |
4267 | bsb.magic[15] = '2'; | |
4268 | for (i = 0; i < dests; i++) | |
4269 | if (part) | |
358ef9bf JS |
4270 | lseek64(destfd[i], destoffsets[i] + |
4271 | __le64_to_cpu(bsb.devstart2)*512, 0); | |
7236ee7a N |
4272 | else |
4273 | lseek64(destfd[i], destoffsets[i], 0); | |
4274 | ||
358ef9bf JS |
4275 | rv = save_stripes(sources, offsets, disks, chunk, level, layout, |
4276 | dests, destfd, offset * 512 * odata, | |
4277 | stripes * chunk * odata, buf); | |
7236ee7a N |
4278 | |
4279 | if (rv) | |
4280 | return rv; | |
97396422 | 4281 | bsb.mtime = __cpu_to_le64(time(0)); |
7236ee7a N |
4282 | for (i = 0; i < dests; i++) { |
4283 | bsb.devstart = __cpu_to_le64(destoffsets[i]/512); | |
4284 | ||
358ef9bf JS |
4285 | bsb.sb_csum = bsb_csum((char*)&bsb, |
4286 | ((char*)&bsb.sb_csum)-((char*)&bsb)); | |
7236ee7a N |
4287 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0) |
4288 | bsb.sb_csum2 = bsb_csum((char*)&bsb, | |
4289 | ((char*)&bsb.sb_csum2)-((char*)&bsb)); | |
4290 | ||
72044953 | 4291 | rv = -1; |
d16a7494 JS |
4292 | if ((unsigned long long)lseek64(destfd[i], |
4293 | destoffsets[i] - 4096, 0) != | |
4294 | destoffsets[i] - 4096) | |
72044953 N |
4295 | break; |
4296 | if (write(destfd[i], &bsb, 512) != 512) | |
4297 | break; | |
ff94fb86 | 4298 | if (destoffsets[i] > 4096) { |
f21e18ca | 4299 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i]+stripes*chunk*odata, 0) != |
a847575a | 4300 | destoffsets[i]+stripes*chunk*odata) |
72044953 N |
4301 | break; |
4302 | if (write(destfd[i], &bsb, 512) != 512) | |
4303 | break; | |
ff94fb86 | 4304 | } |
7236ee7a | 4305 | fsync(destfd[i]); |
72044953 | 4306 | rv = 0; |
7236ee7a | 4307 | } |
2efedc7b | 4308 | |
fcf57625 | 4309 | return rv; |
7236ee7a N |
4310 | } |
4311 | ||
4312 | /* in 2.6.30, the value reported by sync_completed can be | |
4313 | * less that it should be by one stripe. | |
4314 | * This only happens when reshape hits sync_max and pauses. | |
4315 | * So allow wait_backup to either extent sync_max further | |
4316 | * than strictly necessary, or return before the | |
4317 | * sync has got quite as far as we would really like. | |
4318 | * This is what 'blocks2' is for. | |
4319 | * The various caller give appropriate values so that | |
4320 | * every works. | |
4321 | */ | |
fcf57625 | 4322 | /* FIXME return value is often ignored */ |
24daa16f N |
4323 | static int forget_backup(int dests, int *destfd, |
4324 | unsigned long long *destoffsets, | |
4325 | int part) | |
7236ee7a | 4326 | { |
24daa16f | 4327 | /* |
7443ee81 | 4328 | * Erase backup 'part' (which is 0 or 1) |
7236ee7a | 4329 | */ |
7236ee7a | 4330 | int i; |
fcf57625 | 4331 | int rv; |
7236ee7a | 4332 | |
7236ee7a N |
4333 | if (part) { |
4334 | bsb.arraystart2 = __cpu_to_le64(0); | |
4335 | bsb.length2 = __cpu_to_le64(0); | |
4336 | } else { | |
4337 | bsb.arraystart = __cpu_to_le64(0); | |
4338 | bsb.length = __cpu_to_le64(0); | |
4339 | } | |
97396422 | 4340 | bsb.mtime = __cpu_to_le64(time(0)); |
fcf57625 | 4341 | rv = 0; |
7236ee7a N |
4342 | for (i = 0; i < dests; i++) { |
4343 | bsb.devstart = __cpu_to_le64(destoffsets[i]/512); | |
358ef9bf JS |
4344 | bsb.sb_csum = bsb_csum((char*)&bsb, |
4345 | ((char*)&bsb.sb_csum)-((char*)&bsb)); | |
7236ee7a N |
4346 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0) |
4347 | bsb.sb_csum2 = bsb_csum((char*)&bsb, | |
4348 | ((char*)&bsb.sb_csum2)-((char*)&bsb)); | |
f21e18ca | 4349 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i]-4096, 0) != |
a847575a | 4350 | destoffsets[i]-4096) |
72044953 | 4351 | rv = -1; |
358ef9bf | 4352 | if (rv == 0 && write(destfd[i], &bsb, 512) != 512) |
72044953 | 4353 | rv = -1; |
7236ee7a N |
4354 | fsync(destfd[i]); |
4355 | } | |
fcf57625 | 4356 | return rv; |
7236ee7a | 4357 | } |
e86c9dd6 | 4358 | |
7236ee7a N |
4359 | static void fail(char *msg) |
4360 | { | |
fcf57625 | 4361 | int rv; |
72044953 N |
4362 | rv = (write(2, msg, strlen(msg)) != (int)strlen(msg)); |
4363 | rv |= (write(2, "\n", 1) != 1); | |
fcf57625 | 4364 | exit(rv ? 1 : 2); |
7236ee7a N |
4365 | } |
4366 | ||
4367 | static char *abuf, *bbuf; | |
f21e18ca | 4368 | static unsigned long long abuflen; |
7236ee7a N |
4369 | static void validate(int afd, int bfd, unsigned long long offset) |
4370 | { | |
4371 | /* check that the data in the backup against the array. | |
4372 | * This is only used for regression testing and should not | |
4373 | * be used while the array is active | |
4374 | */ | |
7236ee7a N |
4375 | if (afd < 0) |
4376 | return; | |
4377 | lseek64(bfd, offset - 4096, 0); | |
4378 | if (read(bfd, &bsb2, 512) != 512) | |
4379 | fail("cannot read bsb"); | |
4380 | if (bsb2.sb_csum != bsb_csum((char*)&bsb2, | |
4381 | ((char*)&bsb2.sb_csum)-((char*)&bsb2))) | |
4382 | fail("first csum bad"); | |
4383 | if (memcmp(bsb2.magic, "md_backup_data", 14) != 0) | |
4384 | fail("magic is bad"); | |
4385 | if (memcmp(bsb2.magic, "md_backup_data-2", 16) == 0 && | |
4386 | bsb2.sb_csum2 != bsb_csum((char*)&bsb2, | |
24daa16f | 4387 | ((char*)&bsb2.sb_csum2)-((char*)&bsb2))) |
7236ee7a N |
4388 | fail("second csum bad"); |
4389 | ||
4390 | if (__le64_to_cpu(bsb2.devstart)*512 != offset) | |
4391 | fail("devstart is wrong"); | |
4392 | ||
4393 | if (bsb2.length) { | |
4394 | unsigned long long len = __le64_to_cpu(bsb2.length)*512; | |
4395 | ||
4396 | if (abuflen < len) { | |
4397 | free(abuf); | |
4398 | free(bbuf); | |
4399 | abuflen = len; | |
fcf57625 N |
4400 | if (posix_memalign((void**)&abuf, 4096, abuflen) || |
4401 | posix_memalign((void**)&bbuf, 4096, abuflen)) { | |
4402 | abuflen = 0; | |
4403 | /* just stop validating on mem-alloc failure */ | |
4404 | return; | |
4405 | } | |
e86c9dd6 | 4406 | } |
48924014 | 4407 | |
7236ee7a | 4408 | lseek64(bfd, offset, 0); |
f21e18ca | 4409 | if ((unsigned long long)read(bfd, bbuf, len) != len) { |
080fd005 | 4410 | //printf("len %llu\n", len); |
7236ee7a N |
4411 | fail("read first backup failed"); |
4412 | } | |
4413 | lseek64(afd, __le64_to_cpu(bsb2.arraystart)*512, 0); | |
f21e18ca | 4414 | if ((unsigned long long)read(afd, abuf, len) != len) |
7236ee7a N |
4415 | fail("read first from array failed"); |
4416 | if (memcmp(bbuf, abuf, len) != 0) { | |
24daa16f | 4417 | #if 0 |
7236ee7a N |
4418 | int i; |
4419 | printf("offset=%llu len=%llu\n", | |
080fd005 | 4420 | (unsigned long long)__le64_to_cpu(bsb2.arraystart)*512, len); |
7236ee7a N |
4421 | for (i=0; i<len; i++) |
4422 | if (bbuf[i] != abuf[i]) { | |
4423 | printf("first diff byte %d\n", i); | |
93ecfa01 | 4424 | break; |
7236ee7a | 4425 | } |
24daa16f | 4426 | #endif |
7236ee7a | 4427 | fail("data1 compare failed"); |
e86c9dd6 | 4428 | } |
7236ee7a N |
4429 | } |
4430 | if (bsb2.length2) { | |
4431 | unsigned long long len = __le64_to_cpu(bsb2.length2)*512; | |
4432 | ||
4433 | if (abuflen < len) { | |
4434 | free(abuf); | |
4435 | free(bbuf); | |
4436 | abuflen = len; | |
503975b9 N |
4437 | abuf = xmalloc(abuflen); |
4438 | bbuf = xmalloc(abuflen); | |
e86c9dd6 NB |
4439 | } |
4440 | ||
7236ee7a | 4441 | lseek64(bfd, offset+__le64_to_cpu(bsb2.devstart2)*512, 0); |
f21e18ca | 4442 | if ((unsigned long long)read(bfd, bbuf, len) != len) |
7236ee7a N |
4443 | fail("read second backup failed"); |
4444 | lseek64(afd, __le64_to_cpu(bsb2.arraystart2)*512, 0); | |
f21e18ca | 4445 | if ((unsigned long long)read(afd, abuf, len) != len) |
7236ee7a N |
4446 | fail("read second from array failed"); |
4447 | if (memcmp(bbuf, abuf, len) != 0) | |
4448 | fail("data2 compare failed"); | |
e86c9dd6 | 4449 | } |
7236ee7a | 4450 | } |
e86c9dd6 | 4451 | |
999b4972 N |
4452 | int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, |
4453 | struct supertype *st, unsigned long blocks, | |
4454 | int *fds, unsigned long long *offsets, | |
4455 | int dests, int *destfd, unsigned long long *destoffsets) | |
7236ee7a | 4456 | { |
7443ee81 N |
4457 | /* Monitor a reshape where backup is being performed using |
4458 | * 'native' mechanism - either to a backup file, or | |
4459 | * to some space in a spare. | |
4460 | */ | |
7236ee7a | 4461 | char *buf; |
7443ee81 N |
4462 | int degraded = -1; |
4463 | unsigned long long speed; | |
4464 | unsigned long long suspend_point, array_size; | |
4465 | unsigned long long backup_point, wait_point; | |
4466 | unsigned long long reshape_completed; | |
4467 | int done = 0; | |
358ef9bf JS |
4468 | int increasing = reshape->after.data_disks >= |
4469 | reshape->before.data_disks; | |
4470 | int part = 0; /* The next part of the backup area to fill. It | |
4471 | * may already be full, so we need to check */ | |
7443ee81 N |
4472 | int level = reshape->level; |
4473 | int layout = reshape->before.layout; | |
4474 | int data = reshape->before.data_disks; | |
4475 | int disks = reshape->before.data_disks + reshape->parity; | |
4476 | int chunk = sra->array.chunk_size; | |
da8100ca N |
4477 | struct mdinfo *sd; |
4478 | unsigned long stripes; | |
3b7e9d0c | 4479 | int uuid[4]; |
a6b2d86c | 4480 | int frozen = 0; |
da8100ca N |
4481 | |
4482 | /* set up the backup-super-block. This requires the | |
4483 | * uuid from the array. | |
4484 | */ | |
4485 | /* Find a superblock */ | |
4486 | for (sd = sra->devs; sd; sd = sd->next) { | |
4487 | char *dn; | |
4488 | int devfd; | |
4489 | int ok; | |
4490 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
4491 | continue; | |
4492 | dn = map_dev(sd->disk.major, sd->disk.minor, 1); | |
4493 | devfd = dev_open(dn, O_RDONLY); | |
4494 | if (devfd < 0) | |
4495 | continue; | |
4496 | ok = st->ss->load_super(st, devfd, NULL); | |
4497 | close(devfd); | |
77f8d358 | 4498 | if (ok == 0) |
da8100ca N |
4499 | break; |
4500 | } | |
4501 | if (!sd) { | |
e7b84f9d | 4502 | pr_err("Cannot find a superblock\n"); |
da8100ca N |
4503 | return 0; |
4504 | } | |
4505 | ||
4506 | memset(&bsb, 0, 512); | |
4507 | memcpy(bsb.magic, "md_backup_data-1", 16); | |
3b7e9d0c LB |
4508 | st->ss->uuid_from_super(st, uuid); |
4509 | memcpy(bsb.set_uuid, uuid, 16); | |
da8100ca N |
4510 | bsb.mtime = __cpu_to_le64(time(0)); |
4511 | bsb.devstart2 = blocks; | |
4512 | ||
4513 | stripes = blocks / (sra->array.chunk_size/512) / | |
4514 | reshape->before.data_disks; | |
e86c9dd6 | 4515 | |
fcf57625 N |
4516 | if (posix_memalign((void**)&buf, 4096, disks * chunk)) |
4517 | /* Don't start the 'reshape' */ | |
4518 | return 0; | |
7443ee81 N |
4519 | if (reshape->before.data_disks == reshape->after.data_disks) { |
4520 | sysfs_get_ll(sra, NULL, "sync_speed_min", &speed); | |
4521 | sysfs_set_num(sra, NULL, "sync_speed_min", 200000); | |
4522 | } | |
e86c9dd6 | 4523 | |
7443ee81 | 4524 | if (increasing) { |
96533072 | 4525 | array_size = sra->component_size * reshape->after.data_disks; |
7443ee81 N |
4526 | backup_point = sra->reshape_progress; |
4527 | suspend_point = 0; | |
4528 | } else { | |
96533072 | 4529 | array_size = sra->component_size * reshape->before.data_disks; |
25da62d9 | 4530 | backup_point = reshape->backup_blocks; |
7443ee81 N |
4531 | suspend_point = array_size; |
4532 | } | |
7236ee7a | 4533 | |
7443ee81 N |
4534 | while (!done) { |
4535 | int rv; | |
7236ee7a | 4536 | |
7443ee81 N |
4537 | /* Want to return as soon the oldest backup slot can |
4538 | * be released as that allows us to start backing up | |
4539 | * some more, providing suspend_point has been | |
b6b95155 | 4540 | * advanced, which it should have. |
7443ee81 N |
4541 | */ |
4542 | if (increasing) { | |
4543 | wait_point = array_size; | |
4544 | if (part == 0 && __le64_to_cpu(bsb.length) > 0) | |
4545 | wait_point = (__le64_to_cpu(bsb.arraystart) + | |
4546 | __le64_to_cpu(bsb.length)); | |
4547 | if (part == 1 && __le64_to_cpu(bsb.length2) > 0) | |
4548 | wait_point = (__le64_to_cpu(bsb.arraystart2) + | |
4549 | __le64_to_cpu(bsb.length2)); | |
4550 | } else { | |
4551 | wait_point = 0; | |
4552 | if (part == 0 && __le64_to_cpu(bsb.length) > 0) | |
4553 | wait_point = __le64_to_cpu(bsb.arraystart); | |
4554 | if (part == 1 && __le64_to_cpu(bsb.length2) > 0) | |
4555 | wait_point = __le64_to_cpu(bsb.arraystart2); | |
4556 | } | |
4557 | ||
737f8574 | 4558 | reshape_completed = sra->reshape_progress; |
7443ee81 N |
4559 | rv = progress_reshape(sra, reshape, |
4560 | backup_point, wait_point, | |
a6b2d86c N |
4561 | &suspend_point, &reshape_completed, |
4562 | &frozen); | |
7443ee81 N |
4563 | /* external metadata would need to ping_monitor here */ |
4564 | sra->reshape_progress = reshape_completed; | |
7236ee7a | 4565 | |
7443ee81 N |
4566 | /* Clear any backup region that is before 'here' */ |
4567 | if (increasing) { | |
b3cf095a N |
4568 | if (__le64_to_cpu(bsb.length) > 0 && |
4569 | reshape_completed >= (__le64_to_cpu(bsb.arraystart) + | |
7443ee81 N |
4570 | __le64_to_cpu(bsb.length))) |
4571 | forget_backup(dests, destfd, | |
4572 | destoffsets, 0); | |
b3cf095a N |
4573 | if (__le64_to_cpu(bsb.length2) > 0 && |
4574 | reshape_completed >= (__le64_to_cpu(bsb.arraystart2) + | |
7443ee81 N |
4575 | __le64_to_cpu(bsb.length2))) |
4576 | forget_backup(dests, destfd, | |
4577 | destoffsets, 1); | |
4578 | } else { | |
b3cf095a N |
4579 | if (__le64_to_cpu(bsb.length) > 0 && |
4580 | reshape_completed <= (__le64_to_cpu(bsb.arraystart))) | |
7443ee81 N |
4581 | forget_backup(dests, destfd, |
4582 | destoffsets, 0); | |
b3cf095a N |
4583 | if (__le64_to_cpu(bsb.length2) > 0 && |
4584 | reshape_completed <= (__le64_to_cpu(bsb.arraystart2))) | |
7443ee81 N |
4585 | forget_backup(dests, destfd, |
4586 | destoffsets, 1); | |
4587 | } | |
84d11e6c N |
4588 | if (sigterm) |
4589 | rv = -2; | |
223c5c99 | 4590 | if (rv < 0) { |
77a73a17 N |
4591 | if (rv == -1) |
4592 | done = 1; | |
223c5c99 N |
4593 | break; |
4594 | } | |
2d4de5f9 N |
4595 | if (rv == 0 && increasing && !st->ss->external) { |
4596 | /* No longer need to monitor this reshape */ | |
2cdd5ce0 | 4597 | sysfs_set_str(sra, NULL, "sync_max", "max"); |
2d4de5f9 N |
4598 | done = 1; |
4599 | break; | |
4600 | } | |
223c5c99 | 4601 | |
60204e4e | 4602 | while (rv) { |
7443ee81 | 4603 | unsigned long long offset; |
e97ca002 | 4604 | unsigned long actual_stripes; |
60204e4e N |
4605 | /* Need to backup some data. |
4606 | * If 'part' is not used and the desired | |
4607 | * backup size is suspended, do a backup, | |
4608 | * then consider the next part. | |
4609 | */ | |
7443ee81 N |
4610 | /* Check that 'part' is unused */ |
4611 | if (part == 0 && __le64_to_cpu(bsb.length) != 0) | |
60204e4e | 4612 | break; |
7443ee81 | 4613 | if (part == 1 && __le64_to_cpu(bsb.length2) != 0) |
60204e4e | 4614 | break; |
7443ee81 N |
4615 | |
4616 | offset = backup_point / data; | |
e97ca002 | 4617 | actual_stripes = stripes; |
60204e4e | 4618 | if (increasing) { |
e97ca002 N |
4619 | if (offset + actual_stripes * (chunk/512) > |
4620 | sra->component_size) | |
4621 | actual_stripes = ((sra->component_size - offset) | |
4622 | / (chunk/512)); | |
4623 | if (offset + actual_stripes * (chunk/512) > | |
60204e4e N |
4624 | suspend_point/data) |
4625 | break; | |
4626 | } else { | |
e97ca002 N |
4627 | if (offset < actual_stripes * (chunk/512)) |
4628 | actual_stripes = offset / (chunk/512); | |
4629 | offset -= actual_stripes * (chunk/512); | |
4630 | if (offset < suspend_point/data) | |
60204e4e N |
4631 | break; |
4632 | } | |
e4b11073 N |
4633 | if (actual_stripes == 0) |
4634 | break; | |
358ef9bf JS |
4635 | grow_backup(sra, offset, actual_stripes, fds, offsets, |
4636 | disks, chunk, level, layout, dests, destfd, | |
4637 | destoffsets, part, °raded, buf); | |
7443ee81 N |
4638 | validate(afd, destfd[0], destoffsets[0]); |
4639 | /* record where 'part' is up to */ | |
4640 | part = !part; | |
4641 | if (increasing) | |
e97ca002 | 4642 | backup_point += actual_stripes * (chunk/512) * data; |
7443ee81 | 4643 | else |
e97ca002 | 4644 | backup_point -= actual_stripes * (chunk/512) * data; |
7443ee81 N |
4645 | } |
4646 | } | |
4647 | ||
223c5c99 | 4648 | /* FIXME maybe call progress_reshape one more time instead */ |
5e7be838 N |
4649 | /* remove any remaining suspension */ |
4650 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); | |
4651 | sysfs_set_num(sra, NULL, "suspend_hi", 0); | |
4652 | sysfs_set_num(sra, NULL, "suspend_lo", 0); | |
4653 | sysfs_set_num(sra, NULL, "sync_min", 0); | |
4654 | ||
7443ee81 N |
4655 | if (reshape->before.data_disks == reshape->after.data_disks) |
4656 | sysfs_set_num(sra, NULL, "sync_speed_min", speed); | |
7236ee7a | 4657 | free(buf); |
77a73a17 | 4658 | return done; |
e86c9dd6 | 4659 | } |
353632d9 NB |
4660 | |
4661 | /* | |
4662 | * If any spare contains md_back_data-1 which is recent wrt mtime, | |
4663 | * write that data into the array and update the super blocks with | |
4664 | * the new reshape_progress | |
4665 | */ | |
358ef9bf JS |
4666 | int Grow_restart(struct supertype *st, struct mdinfo *info, int *fdlist, |
4667 | int cnt, char *backup_file, int verbose) | |
353632d9 NB |
4668 | { |
4669 | int i, j; | |
4670 | int old_disks; | |
353632d9 | 4671 | unsigned long long *offsets; |
82f2d6ab | 4672 | unsigned long long nstripe, ostripe; |
6e9eac4f | 4673 | int ndata, odata; |
353632d9 | 4674 | |
e9e43ec3 | 4675 | odata = info->array.raid_disks - info->delta_disks - 1; |
358ef9bf JS |
4676 | if (info->array.level == 6) |
4677 | odata--; /* number of data disks */ | |
e9e43ec3 | 4678 | ndata = info->array.raid_disks - 1; |
358ef9bf JS |
4679 | if (info->new_level == 6) |
4680 | ndata--; | |
353632d9 NB |
4681 | |
4682 | old_disks = info->array.raid_disks - info->delta_disks; | |
4683 | ||
e9e43ec3 N |
4684 | if (info->delta_disks <= 0) |
4685 | /* Didn't grow, so the backup file must have | |
4686 | * been used | |
4687 | */ | |
4688 | old_disks = cnt; | |
06b0d786 | 4689 | for (i=old_disks-(backup_file?1:0); i<cnt; i++) { |
353632d9 | 4690 | struct mdinfo dinfo; |
06b0d786 | 4691 | int fd; |
e9e43ec3 | 4692 | int bsbsize; |
ea0ebe96 | 4693 | char *devname, namebuf[20]; |
10af14c4 | 4694 | unsigned long long lo, hi; |
353632d9 NB |
4695 | |
4696 | /* This was a spare and may have some saved data on it. | |
4697 | * Load the superblock, find and load the | |
4698 | * backup_super_block. | |
4699 | * If either fail, go on to next device. | |
4700 | * If the backup contains no new info, just return | |
206c5eae | 4701 | * else restore data and update all superblocks |
353632d9 | 4702 | */ |
06b0d786 NB |
4703 | if (i == old_disks-1) { |
4704 | fd = open(backup_file, O_RDONLY); | |
e9e43ec3 | 4705 | if (fd<0) { |
e7b84f9d | 4706 | pr_err("backup file %s inaccessible: %s\n", |
e9e43ec3 | 4707 | backup_file, strerror(errno)); |
06b0d786 | 4708 | continue; |
e9e43ec3 | 4709 | } |
ea0ebe96 | 4710 | devname = backup_file; |
06b0d786 NB |
4711 | } else { |
4712 | fd = fdlist[i]; | |
4713 | if (fd < 0) | |
4714 | continue; | |
3da92f27 | 4715 | if (st->ss->load_super(st, fd, NULL)) |
06b0d786 | 4716 | continue; |
353632d9 | 4717 | |
a5d85af7 | 4718 | st->ss->getinfo_super(st, &dinfo, NULL); |
3da92f27 NB |
4719 | st->ss->free_super(st); |
4720 | ||
06b0d786 NB |
4721 | if (lseek64(fd, |
4722 | (dinfo.data_offset + dinfo.component_size - 8) <<9, | |
ea0ebe96 | 4723 | 0) < 0) { |
e7b84f9d | 4724 | pr_err("Cannot seek on device %d\n", i); |
06b0d786 | 4725 | continue; /* Cannot seek */ |
ea0ebe96 N |
4726 | } |
4727 | sprintf(namebuf, "device-%d", i); | |
4728 | devname = namebuf; | |
06b0d786 | 4729 | } |
ea0ebe96 N |
4730 | if (read(fd, &bsb, sizeof(bsb)) != sizeof(bsb)) { |
4731 | if (verbose) | |
e7b84f9d | 4732 | pr_err("Cannot read from %s\n", devname); |
353632d9 | 4733 | continue; /* Cannot read */ |
ea0ebe96 | 4734 | } |
e9e43ec3 | 4735 | if (memcmp(bsb.magic, "md_backup_data-1", 16) != 0 && |
ea0ebe96 N |
4736 | memcmp(bsb.magic, "md_backup_data-2", 16) != 0) { |
4737 | if (verbose) | |
e7b84f9d | 4738 | pr_err("No backup metadata on %s\n", devname); |
353632d9 | 4739 | continue; |
ea0ebe96 N |
4740 | } |
4741 | if (bsb.sb_csum != bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb))) { | |
4742 | if (verbose) | |
358ef9bf JS |
4743 | pr_err("Bad backup-metadata checksum on %s\n", |
4744 | devname); | |
353632d9 | 4745 | continue; /* bad checksum */ |
ea0ebe96 | 4746 | } |
e9e43ec3 | 4747 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0 && |
ea0ebe96 N |
4748 | bsb.sb_csum2 != bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum2)-((char*)&bsb))) { |
4749 | if (verbose) | |
358ef9bf JS |
4750 | pr_err("Bad backup-metadata checksum2 on %s\n", |
4751 | devname); | |
22e30516 | 4752 | continue; /* Bad second checksum */ |
ea0ebe96 N |
4753 | } |
4754 | if (memcmp(bsb.set_uuid,info->uuid, 16) != 0) { | |
4755 | if (verbose) | |
358ef9bf JS |
4756 | pr_err("Wrong uuid on backup-metadata on %s\n", |
4757 | devname); | |
353632d9 | 4758 | continue; /* Wrong uuid */ |
ea0ebe96 | 4759 | } |
353632d9 | 4760 | |
358ef9bf JS |
4761 | /* |
4762 | * array utime and backup-mtime should be updated at | |
4763 | * much the same time, but it seems that sometimes | |
4764 | * they aren't... So allow considerable flexability in | |
4765 | * matching, and allow this test to be overridden by | |
4766 | * an environment variable. | |
097075b6 | 4767 | */ |
26714713 DD |
4768 | if(time_after(info->array.utime, (unsigned int)__le64_to_cpu(bsb.mtime) + 2*60*60) || |
4769 | time_before(info->array.utime, (unsigned int)__le64_to_cpu(bsb.mtime) - 10*60)) { | |
097075b6 | 4770 | if (check_env("MDADM_GROW_ALLOW_OLD")) { |
7a862a02 | 4771 | pr_err("accepting backup with timestamp %lu for array with timestamp %lu\n", |
097075b6 N |
4772 | (unsigned long)__le64_to_cpu(bsb.mtime), |
4773 | (unsigned long)info->array.utime); | |
4774 | } else { | |
676ab312 N |
4775 | pr_err("too-old timestamp on backup-metadata on %s\n", devname); |
4776 | pr_err("If you think it is should be safe, try 'export MDADM_GROW_ALLOW_OLD=1'\n"); | |
097075b6 N |
4777 | continue; /* time stamp is too bad */ |
4778 | } | |
ea0ebe96 | 4779 | } |
353632d9 | 4780 | |
e9e43ec3 | 4781 | if (bsb.magic[15] == '1') { |
10af14c4 N |
4782 | if (bsb.length == 0) |
4783 | continue; | |
e7a71c6b N |
4784 | if (info->delta_disks >= 0) { |
4785 | /* reshape_progress is increasing */ | |
4786 | if (__le64_to_cpu(bsb.arraystart) | |
4787 | + __le64_to_cpu(bsb.length) | |
4788 | < info->reshape_progress) { | |
4789 | nonew: | |
4790 | if (verbose) | |
e7b84f9d | 4791 | pr_err("backup-metadata found on %s but is not needed\n", devname); |
e7a71c6b N |
4792 | continue; /* No new data here */ |
4793 | } | |
4794 | } else { | |
4795 | /* reshape_progress is decreasing */ | |
4796 | if (__le64_to_cpu(bsb.arraystart) >= | |
4797 | info->reshape_progress) | |
4798 | goto nonew; /* No new data here */ | |
ea0ebe96 | 4799 | } |
e9e43ec3 | 4800 | } else { |
10af14c4 N |
4801 | if (bsb.length == 0 && bsb.length2 == 0) |
4802 | continue; | |
e7a71c6b N |
4803 | if (info->delta_disks >= 0) { |
4804 | /* reshape_progress is increasing */ | |
4805 | if ((__le64_to_cpu(bsb.arraystart) | |
4806 | + __le64_to_cpu(bsb.length) | |
fc54fe7a | 4807 | < info->reshape_progress) && |
e7a71c6b N |
4808 | (__le64_to_cpu(bsb.arraystart2) |
4809 | + __le64_to_cpu(bsb.length2) | |
4810 | < info->reshape_progress)) | |
4811 | goto nonew; /* No new data here */ | |
4812 | } else { | |
4813 | /* reshape_progress is decreasing */ | |
4814 | if (__le64_to_cpu(bsb.arraystart) >= | |
4815 | info->reshape_progress && | |
4816 | __le64_to_cpu(bsb.arraystart2) >= | |
4817 | info->reshape_progress) | |
4818 | goto nonew; /* No new data here */ | |
4819 | } | |
e9e43ec3 | 4820 | } |
ea0ebe96 N |
4821 | if (lseek64(fd, __le64_to_cpu(bsb.devstart)*512, 0)< 0) { |
4822 | second_fail: | |
4823 | if (verbose) | |
e7b84f9d N |
4824 | pr_err("Failed to verify secondary backup-metadata block on %s\n", |
4825 | devname); | |
353632d9 | 4826 | continue; /* Cannot seek */ |
ea0ebe96 | 4827 | } |
2efedc7b | 4828 | /* There should be a duplicate backup superblock 4k before here */ |
06b0d786 | 4829 | if (lseek64(fd, -4096, 1) < 0 || |
0155af90 | 4830 | read(fd, &bsb2, sizeof(bsb2)) != sizeof(bsb2)) |
ea0ebe96 | 4831 | goto second_fail; /* Cannot find leading superblock */ |
e9e43ec3 N |
4832 | if (bsb.magic[15] == '1') |
4833 | bsbsize = offsetof(struct mdp_backup_super, pad1); | |
4834 | else | |
4835 | bsbsize = offsetof(struct mdp_backup_super, pad); | |
ff94fb86 | 4836 | if (memcmp(&bsb2, &bsb, bsbsize) != 0) |
ea0ebe96 | 4837 | goto second_fail; /* Cannot find leading superblock */ |
2efedc7b | 4838 | |
353632d9 | 4839 | /* Now need the data offsets for all devices. */ |
503975b9 | 4840 | offsets = xmalloc(sizeof(*offsets)*info->array.raid_disks); |
353632d9 NB |
4841 | for(j=0; j<info->array.raid_disks; j++) { |
4842 | if (fdlist[j] < 0) | |
4843 | continue; | |
3da92f27 | 4844 | if (st->ss->load_super(st, fdlist[j], NULL)) |
353632d9 NB |
4845 | /* FIXME should be this be an error */ |
4846 | continue; | |
a5d85af7 | 4847 | st->ss->getinfo_super(st, &dinfo, NULL); |
3da92f27 | 4848 | st->ss->free_super(st); |
14e5b4d7 | 4849 | offsets[j] = dinfo.data_offset * 512; |
353632d9 | 4850 | } |
d56dd607 | 4851 | printf("%s: restoring critical section\n", Name); |
353632d9 | 4852 | |
358ef9bf JS |
4853 | if (restore_stripes(fdlist, offsets, info->array.raid_disks, |
4854 | info->new_chunk, info->new_level, | |
4855 | info->new_layout, fd, | |
4856 | __le64_to_cpu(bsb.devstart)*512, | |
92dcdf7c | 4857 | __le64_to_cpu(bsb.arraystart)*512, |
2fcb75ae | 4858 | __le64_to_cpu(bsb.length)*512, NULL)) { |
e9e43ec3 | 4859 | /* didn't succeed, so giveup */ |
ea0ebe96 | 4860 | if (verbose) |
e7b84f9d | 4861 | pr_err("Error restoring backup from %s\n", |
ea0ebe96 | 4862 | devname); |
730ae51f | 4863 | free(offsets); |
e9e43ec3 N |
4864 | return 1; |
4865 | } | |
24daa16f | 4866 | |
e9e43ec3 | 4867 | if (bsb.magic[15] == '2' && |
358ef9bf JS |
4868 | restore_stripes(fdlist, offsets, info->array.raid_disks, |
4869 | info->new_chunk, info->new_level, | |
4870 | info->new_layout, fd, | |
4871 | __le64_to_cpu(bsb.devstart)*512 + | |
e9e43ec3 | 4872 | __le64_to_cpu(bsb.devstart2)*512, |
92dcdf7c | 4873 | __le64_to_cpu(bsb.arraystart2)*512, |
2fcb75ae | 4874 | __le64_to_cpu(bsb.length2)*512, NULL)) { |
353632d9 | 4875 | /* didn't succeed, so giveup */ |
ea0ebe96 | 4876 | if (verbose) |
e7b84f9d | 4877 | pr_err("Error restoring second backup from %s\n", |
ea0ebe96 | 4878 | devname); |
730ae51f | 4879 | free(offsets); |
2295250a | 4880 | return 1; |
353632d9 NB |
4881 | } |
4882 | ||
730ae51f | 4883 | free(offsets); |
e9e43ec3 | 4884 | |
353632d9 NB |
4885 | /* Ok, so the data is restored. Let's update those superblocks. */ |
4886 | ||
10af14c4 N |
4887 | lo = hi = 0; |
4888 | if (bsb.length) { | |
4889 | lo = __le64_to_cpu(bsb.arraystart); | |
4890 | hi = lo + __le64_to_cpu(bsb.length); | |
4891 | } | |
4892 | if (bsb.magic[15] == '2' && bsb.length2) { | |
4893 | unsigned long long lo1, hi1; | |
4894 | lo1 = __le64_to_cpu(bsb.arraystart2); | |
4895 | hi1 = lo1 + __le64_to_cpu(bsb.length2); | |
4896 | if (lo == hi) { | |
4897 | lo = lo1; | |
4898 | hi = hi1; | |
4899 | } else if (lo < lo1) | |
4900 | hi = hi1; | |
4901 | else | |
4902 | lo = lo1; | |
4903 | } | |
358ef9bf JS |
4904 | if (lo < hi && (info->reshape_progress < lo || |
4905 | info->reshape_progress > hi)) | |
10af14c4 N |
4906 | /* backup does not affect reshape_progress*/ ; |
4907 | else if (info->delta_disks >= 0) { | |
e9e43ec3 N |
4908 | info->reshape_progress = __le64_to_cpu(bsb.arraystart) + |
4909 | __le64_to_cpu(bsb.length); | |
4910 | if (bsb.magic[15] == '2') { | |
358ef9bf JS |
4911 | unsigned long long p2; |
4912 | ||
4913 | p2 = __le64_to_cpu(bsb.arraystart2) + | |
e9e43ec3 N |
4914 | __le64_to_cpu(bsb.length2); |
4915 | if (p2 > info->reshape_progress) | |
4916 | info->reshape_progress = p2; | |
4917 | } | |
4918 | } else { | |
4919 | info->reshape_progress = __le64_to_cpu(bsb.arraystart); | |
4920 | if (bsb.magic[15] == '2') { | |
358ef9bf JS |
4921 | unsigned long long p2; |
4922 | ||
4923 | p2 = __le64_to_cpu(bsb.arraystart2); | |
e9e43ec3 N |
4924 | if (p2 < info->reshape_progress) |
4925 | info->reshape_progress = p2; | |
4926 | } | |
4927 | } | |
353632d9 | 4928 | for (j=0; j<info->array.raid_disks; j++) { |
ca3b6696 N |
4929 | if (fdlist[j] < 0) |
4930 | continue; | |
3da92f27 | 4931 | if (st->ss->load_super(st, fdlist[j], NULL)) |
353632d9 | 4932 | continue; |
a5d85af7 | 4933 | st->ss->getinfo_super(st, &dinfo, NULL); |
e9e43ec3 | 4934 | dinfo.reshape_progress = info->reshape_progress; |
358ef9bf | 4935 | st->ss->update_super(st, &dinfo, "_reshape_progress", |
68c7d6d7 | 4936 | NULL,0, 0, NULL); |
3da92f27 NB |
4937 | st->ss->store_super(st, fdlist[j]); |
4938 | st->ss->free_super(st); | |
353632d9 | 4939 | } |
353632d9 NB |
4940 | return 0; |
4941 | } | |
6e9eac4f NB |
4942 | /* Didn't find any backup data, try to see if any |
4943 | * was needed. | |
4944 | */ | |
82f2d6ab N |
4945 | if (info->delta_disks < 0) { |
4946 | /* When shrinking, the critical section is at the end. | |
4947 | * So see if we are before the critical section. | |
4948 | */ | |
4949 | unsigned long long first_block; | |
4950 | nstripe = ostripe = 0; | |
4951 | first_block = 0; | |
4952 | while (ostripe >= nstripe) { | |
4953 | ostripe += info->array.chunk_size / 512; | |
4954 | first_block = ostripe * odata; | |
4955 | nstripe = first_block / ndata / (info->new_chunk/512) * | |
4956 | (info->new_chunk/512); | |
4957 | } | |
4958 | ||
4959 | if (info->reshape_progress >= first_block) | |
4960 | return 0; | |
6e9eac4f | 4961 | } |
82f2d6ab N |
4962 | if (info->delta_disks > 0) { |
4963 | /* See if we are beyond the critical section. */ | |
4964 | unsigned long long last_block; | |
4965 | nstripe = ostripe = 0; | |
4966 | last_block = 0; | |
4967 | while (nstripe >= ostripe) { | |
4968 | nstripe += info->new_chunk / 512; | |
4969 | last_block = nstripe * ndata; | |
4970 | ostripe = last_block / odata / (info->array.chunk_size/512) * | |
4971 | (info->array.chunk_size/512); | |
4972 | } | |
6e9eac4f | 4973 | |
82f2d6ab N |
4974 | if (info->reshape_progress >= last_block) |
4975 | return 0; | |
4976 | } | |
6e9eac4f | 4977 | /* needed to recover critical section! */ |
ea0ebe96 | 4978 | if (verbose) |
e7b84f9d | 4979 | pr_err("Failed to find backup of critical section\n"); |
2295250a | 4980 | return 1; |
353632d9 | 4981 | } |
e9e43ec3 | 4982 | |
2dddadb0 AK |
4983 | int Grow_continue_command(char *devname, int fd, |
4984 | char *backup_file, int verbose) | |
4985 | { | |
4986 | int ret_val = 0; | |
4987 | struct supertype *st = NULL; | |
4988 | struct mdinfo *content = NULL; | |
4989 | struct mdinfo array; | |
4990 | char *subarray = NULL; | |
4991 | struct mdinfo *cc = NULL; | |
4992 | struct mdstat_ent *mdstat = NULL; | |
2dddadb0 | 4993 | int cfd = -1; |
12add445 | 4994 | int fd2; |
2dddadb0 | 4995 | |
358ef9bf | 4996 | dprintf("Grow continue from command line called for %s\n", devname); |
2dddadb0 AK |
4997 | |
4998 | st = super_by_fd(fd, &subarray); | |
4999 | if (!st || !st->ss) { | |
358ef9bf | 5000 | pr_err("Unable to determine metadata format for %s\n", devname); |
2dddadb0 AK |
5001 | return 1; |
5002 | } | |
5003 | dprintf("Grow continue is run for "); | |
5004 | if (st->ss->external == 0) { | |
e0ab37a3 | 5005 | int d; |
8800f853 | 5006 | int cnt = 5; |
1ade5cc1 | 5007 | dprintf_cont("native array (%s)\n", devname); |
9cd39f01 JS |
5008 | if (md_get_array_info(fd, &array.array) < 0) { |
5009 | pr_err("%s is not an active md array - aborting\n", | |
5010 | devname); | |
2dddadb0 AK |
5011 | ret_val = 1; |
5012 | goto Grow_continue_command_exit; | |
5013 | } | |
5014 | content = &array; | |
a250ce24 | 5015 | sysfs_init(content, fd, NULL); |
e0ab37a3 N |
5016 | /* Need to load a superblock. |
5017 | * FIXME we should really get what we need from | |
5018 | * sysfs | |
5019 | */ | |
8800f853 XN |
5020 | do { |
5021 | for (d = 0; d < MAX_DISKS; d++) { | |
5022 | mdu_disk_info_t disk; | |
5023 | char *dv; | |
5024 | int err; | |
5025 | disk.number = d; | |
d97572f5 | 5026 | if (md_get_disk_info(fd, &disk) < 0) |
8800f853 XN |
5027 | continue; |
5028 | if (disk.major == 0 && disk.minor == 0) | |
5029 | continue; | |
5030 | if ((disk.state & (1 << MD_DISK_ACTIVE)) == 0) | |
5031 | continue; | |
5032 | dv = map_dev(disk.major, disk.minor, 1); | |
5033 | if (!dv) | |
5034 | continue; | |
5035 | fd2 = dev_open(dv, O_RDONLY); | |
5036 | if (fd2 < 0) | |
5037 | continue; | |
5038 | err = st->ss->load_super(st, fd2, NULL); | |
5039 | close(fd2); | |
5040 | if (err) | |
5041 | continue; | |
5042 | break; | |
5043 | } | |
5044 | if (d == MAX_DISKS) { | |
5045 | pr_err("Unable to load metadata for %s\n", | |
5046 | devname); | |
5047 | ret_val = 1; | |
5048 | goto Grow_continue_command_exit; | |
5049 | } | |
5050 | st->ss->getinfo_super(st, content, NULL); | |
5051 | if (!content->reshape_active) | |
5052 | sleep(3); | |
5053 | else | |
5054 | break; | |
5055 | } while (cnt-- > 0); | |
2dddadb0 | 5056 | } else { |
4dd2df09 | 5057 | char *container; |
2dddadb0 AK |
5058 | |
5059 | if (subarray) { | |
1ade5cc1 | 5060 | dprintf_cont("subarray (%s)\n", subarray); |
4dd2df09 N |
5061 | container = st->container_devnm; |
5062 | cfd = open_dev_excl(st->container_devnm); | |
2dddadb0 | 5063 | } else { |
4dd2df09 | 5064 | container = st->devnm; |
2dddadb0 | 5065 | close(fd); |
4dd2df09 | 5066 | cfd = open_dev_excl(st->devnm); |
1ade5cc1 | 5067 | dprintf_cont("container (%s)\n", container); |
2dddadb0 AK |
5068 | fd = cfd; |
5069 | } | |
5070 | if (cfd < 0) { | |
7a862a02 | 5071 | pr_err("Unable to open container for %s\n", devname); |
2dddadb0 AK |
5072 | ret_val = 1; |
5073 | goto Grow_continue_command_exit; | |
5074 | } | |
2dddadb0 AK |
5075 | |
5076 | /* find in container array under reshape | |
5077 | */ | |
5078 | ret_val = st->ss->load_container(st, cfd, NULL); | |
5079 | if (ret_val) { | |
358ef9bf | 5080 | pr_err("Cannot read superblock for %s\n", devname); |
2dddadb0 AK |
5081 | ret_val = 1; |
5082 | goto Grow_continue_command_exit; | |
5083 | } | |
5084 | ||
446894ea | 5085 | cc = st->ss->container_content(st, subarray); |
2dddadb0 | 5086 | for (content = cc; content ; content = content->next) { |
9e4524df | 5087 | char *array_name; |
446894ea | 5088 | int allow_reshape = 1; |
2dddadb0 AK |
5089 | |
5090 | if (content->reshape_active == 0) | |
5091 | continue; | |
81219e70 LM |
5092 | /* The decision about array or container wide |
5093 | * reshape is taken in Grow_continue based | |
5094 | * content->reshape_active state, therefore we | |
5095 | * need to check_reshape based on | |
5096 | * reshape_active and subarray name | |
446894ea N |
5097 | */ |
5098 | if (content->array.state & (1<<MD_SB_BLOCK_VOLUME)) | |
5099 | allow_reshape = 0; | |
5100 | if (content->reshape_active == CONTAINER_RESHAPE && | |
5101 | (content->array.state | |
5102 | & (1<<MD_SB_BLOCK_CONTAINER_RESHAPE))) | |
5103 | allow_reshape = 0; | |
5104 | ||
81219e70 | 5105 | if (!allow_reshape) { |
7a862a02 | 5106 | pr_err("cannot continue reshape of an array in container with unsupported metadata: %s(%s)\n", |
4dd2df09 | 5107 | devname, container); |
81219e70 LM |
5108 | ret_val = 1; |
5109 | goto Grow_continue_command_exit; | |
5110 | } | |
2dddadb0 | 5111 | |
9e4524df JS |
5112 | array_name = strchr(content->text_version+1, '/')+1; |
5113 | mdstat = mdstat_by_subdev(array_name, container); | |
2dddadb0 AK |
5114 | if (!mdstat) |
5115 | continue; | |
1ca90aa6 | 5116 | if (mdstat->active == 0) { |
4dd2df09 N |
5117 | pr_err("Skipping inactive array %s.\n", |
5118 | mdstat->devnm); | |
1ca90aa6 AK |
5119 | free_mdstat(mdstat); |
5120 | mdstat = NULL; | |
5121 | continue; | |
5122 | } | |
2dddadb0 AK |
5123 | break; |
5124 | } | |
5125 | if (!content) { | |
7a862a02 | 5126 | pr_err("Unable to determine reshaped array for %s\n", devname); |
2dddadb0 AK |
5127 | ret_val = 1; |
5128 | goto Grow_continue_command_exit; | |
5129 | } | |
4dd2df09 | 5130 | fd2 = open_dev(mdstat->devnm); |
2dddadb0 | 5131 | if (fd2 < 0) { |
4dd2df09 | 5132 | pr_err("cannot open (%s)\n", mdstat->devnm); |
2dddadb0 AK |
5133 | ret_val = 1; |
5134 | goto Grow_continue_command_exit; | |
5135 | } | |
5136 | ||
dae13137 | 5137 | if (sysfs_init(content, fd2, mdstat->devnm)) { |
8e5b52cd | 5138 | pr_err("Unable to initialize sysfs for %s, Grow cannot continue.\n", |
dae13137 JS |
5139 | mdstat->devnm); |
5140 | ret_val = 1; | |
5141 | close(fd2); | |
5142 | goto Grow_continue_command_exit; | |
5143 | } | |
2dddadb0 | 5144 | |
10df72a0 | 5145 | close(fd2); |
10df72a0 | 5146 | |
2dddadb0 AK |
5147 | /* start mdmon in case it is not running |
5148 | */ | |
4dd2df09 N |
5149 | if (!mdmon_running(container)) |
5150 | start_mdmon(container); | |
5151 | ping_monitor(container); | |
2dddadb0 | 5152 | |
4dd2df09 | 5153 | if (mdmon_running(container)) |
2dddadb0 AK |
5154 | st->update_tail = &st->updates; |
5155 | else { | |
7a862a02 | 5156 | pr_err("No mdmon found. Grow cannot continue.\n"); |
2dddadb0 AK |
5157 | ret_val = 1; |
5158 | goto Grow_continue_command_exit; | |
5159 | } | |
5160 | } | |
5161 | ||
f1fe496b AK |
5162 | /* verify that array under reshape is started from |
5163 | * correct position | |
5164 | */ | |
e0ab37a3 | 5165 | if (verify_reshape_position(content, content->array.level) < 0) { |
f1fe496b AK |
5166 | ret_val = 1; |
5167 | goto Grow_continue_command_exit; | |
5168 | } | |
5169 | ||
2dddadb0 AK |
5170 | /* continue reshape |
5171 | */ | |
06e293d0 | 5172 | ret_val = Grow_continue(fd, st, content, backup_file, 1, 0); |
2dddadb0 AK |
5173 | |
5174 | Grow_continue_command_exit: | |
2dddadb0 AK |
5175 | if (cfd > -1) |
5176 | close(cfd); | |
5177 | st->ss->free_super(st); | |
5178 | free_mdstat(mdstat); | |
5179 | sysfs_free(cc); | |
5180 | free(subarray); | |
5181 | ||
5182 | return ret_val; | |
5183 | } | |
5184 | ||
e9e43ec3 | 5185 | int Grow_continue(int mdfd, struct supertype *st, struct mdinfo *info, |
06e293d0 | 5186 | char *backup_file, int forked, int freeze_reshape) |
e9e43ec3 | 5187 | { |
3bd58dc6 AK |
5188 | int ret_val = 2; |
5189 | ||
5190 | if (!info->reshape_active) | |
5191 | return ret_val; | |
864a004f | 5192 | |
20a40eca | 5193 | if (st->ss->external) { |
4dd2df09 | 5194 | int cfd = open_dev(st->container_devnm); |
3db2fdd8 | 5195 | |
3bd58dc6 AK |
5196 | if (cfd < 0) |
5197 | return 1; | |
f362d22b | 5198 | |
4dd2df09 | 5199 | st->ss->load_container(st, cfd, st->container_devnm); |
3bd58dc6 | 5200 | close(cfd); |
4dd2df09 | 5201 | ret_val = reshape_container(st->container_devnm, NULL, mdfd, |
358ef9bf JS |
5202 | st, info, 0, backup_file, 0, |
5203 | forked, 1 | info->reshape_active, | |
8ecf12b9 | 5204 | freeze_reshape); |
3bd58dc6 AK |
5205 | } else |
5206 | ret_val = reshape_array(NULL, mdfd, "array", st, info, 1, | |
358ef9bf JS |
5207 | NULL, INVALID_SECTORS, backup_file, |
5208 | 0, forked, 1 | info->reshape_active, | |
3bd58dc6 | 5209 | freeze_reshape); |
f362d22b | 5210 | |
3bd58dc6 | 5211 | return ret_val; |
e9e43ec3 | 5212 | } |
54ded86f N |
5213 | |
5214 | char *make_backup(char *name) | |
5215 | { | |
5216 | char *base = "backup_file-"; | |
5217 | int len; | |
5218 | char *fname; | |
5219 | ||
5220 | len = strlen(MAP_DIR) + 1 + strlen(base) + strlen(name)+1; | |
5221 | fname = xmalloc(len); | |
5222 | sprintf(fname, "%s/%s%s", MAP_DIR, base, name); | |
5223 | return fname; | |
5224 | } | |
5225 | ||
5226 | char *locate_backup(char *name) | |
5227 | { | |
5228 | char *fl = make_backup(name); | |
5229 | struct stat stb; | |
5230 | ||
358ef9bf | 5231 | if (stat(fl, &stb) == 0 && S_ISREG(stb.st_mode)) |
54ded86f N |
5232 | return fl; |
5233 | ||
5234 | free(fl); | |
5235 | return NULL; | |
5236 | } |