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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; | |
61 | sprintf(buf, "%d:%d", | |
62 | dev->disk.major, | |
63 | dev->disk.minor); | |
64 | fd = dev_open(buf, O_RDWR); | |
65 | ||
66 | if (dev->disk.raid_disk >= 0) | |
67 | fdlist[dev->disk.raid_disk] = fd; | |
68 | else | |
69 | fdlist[next_spare++] = fd; | |
70 | } | |
71 | ||
54ded86f N |
72 | if (!backup_file) { |
73 | backup_file = locate_backup(content->sys_name); | |
74 | *backup_filep = backup_file; | |
75 | } | |
76 | ||
3f54bd62 AK |
77 | if (st->ss->external && st->ss->recover_backup) |
78 | err = st->ss->recover_backup(st, content); | |
79 | else | |
80 | err = Grow_restart(st, content, fdlist, next_spare, | |
81 | backup_file, verbose > 0); | |
82 | ||
83 | while (next_spare > 0) { | |
cc7f63e5 N |
84 | next_spare--; |
85 | if (fdlist[next_spare] >= 0) | |
86 | close(fdlist[next_spare]); | |
3f54bd62 AK |
87 | } |
88 | free(fdlist); | |
89 | if (err) { | |
7a862a02 | 90 | pr_err("Failed to restore critical section for reshape - sorry.\n"); |
3f54bd62 | 91 | if (!backup_file) |
7a862a02 | 92 | pr_err("Possibly you need to specify a --backup-file\n"); |
3f54bd62 AK |
93 | return 1; |
94 | } | |
95 | ||
96 | dprintf("restore_backup() returns status OK.\n"); | |
97 | return 0; | |
98 | } | |
99 | ||
e5329c37 NB |
100 | int Grow_Add_device(char *devname, int fd, char *newdev) |
101 | { | |
102 | /* Add a device to an active array. | |
103 | * Currently, just extend a linear array. | |
104 | * This requires writing a new superblock on the | |
105 | * new device, calling the kernel to add the device, | |
106 | * and if that succeeds, update the superblock on | |
107 | * all other devices. | |
108 | * This means that we need to *find* all other devices. | |
109 | */ | |
4b1ac34b NB |
110 | struct mdinfo info; |
111 | ||
e5329c37 NB |
112 | struct stat stb; |
113 | int nfd, fd2; | |
114 | int d, nd; | |
82d9eba6 | 115 | struct supertype *st = NULL; |
4725bc31 | 116 | char *subarray = NULL; |
e5329c37 | 117 | |
9cd39f01 | 118 | if (md_get_array_info(fd, &info.array) < 0) { |
e7b84f9d | 119 | pr_err("cannot get array info for %s\n", devname); |
e5329c37 NB |
120 | return 1; |
121 | } | |
122 | ||
4725bc31 | 123 | if (info.array.level != -1) { |
e7b84f9d | 124 | pr_err("can only add devices to linear arrays\n"); |
4725bc31 N |
125 | return 1; |
126 | } | |
127 | ||
128 | st = super_by_fd(fd, &subarray); | |
82d9eba6 | 129 | if (!st) { |
ca3b6696 N |
130 | pr_err("cannot handle arrays with superblock version %d\n", |
131 | info.array.major_version); | |
f9ce90ba NB |
132 | return 1; |
133 | } | |
134 | ||
4725bc31 | 135 | if (subarray) { |
e7b84f9d | 136 | pr_err("Cannot grow linear sub-arrays yet\n"); |
4725bc31 N |
137 | free(subarray); |
138 | free(st); | |
2641101b | 139 | return 1; |
e5329c37 NB |
140 | } |
141 | ||
6416d527 | 142 | nfd = open(newdev, O_RDWR|O_EXCL|O_DIRECT); |
e5329c37 | 143 | if (nfd < 0) { |
e7b84f9d | 144 | pr_err("cannot open %s\n", newdev); |
4725bc31 | 145 | free(st); |
e5329c37 NB |
146 | return 1; |
147 | } | |
148 | fstat(nfd, &stb); | |
149 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
e7b84f9d | 150 | pr_err("%s is not a block device!\n", newdev); |
e5329c37 | 151 | close(nfd); |
4725bc31 | 152 | free(st); |
e5329c37 NB |
153 | return 1; |
154 | } | |
ca3b6696 N |
155 | /* now check out all the devices and make sure we can read the |
156 | * superblock */ | |
4b1ac34b | 157 | for (d=0 ; d < info.array.raid_disks ; d++) { |
e5329c37 NB |
158 | mdu_disk_info_t disk; |
159 | char *dv; | |
160 | ||
4725bc31 N |
161 | st->ss->free_super(st); |
162 | ||
e5329c37 | 163 | disk.number = d; |
d97572f5 | 164 | if (md_get_disk_info(fd, &disk) < 0) { |
e7b84f9d | 165 | pr_err("cannot get device detail for device %d\n", |
e5329c37 | 166 | d); |
4725bc31 N |
167 | close(nfd); |
168 | free(st); | |
e5329c37 NB |
169 | return 1; |
170 | } | |
16c6fa80 | 171 | dv = map_dev(disk.major, disk.minor, 1); |
e5329c37 | 172 | if (!dv) { |
e7b84f9d | 173 | pr_err("cannot find device file for device %d\n", |
e5329c37 | 174 | d); |
4725bc31 N |
175 | close(nfd); |
176 | free(st); | |
e5329c37 NB |
177 | return 1; |
178 | } | |
16c6fa80 | 179 | fd2 = dev_open(dv, O_RDWR); |
68fe8c6e | 180 | if (fd2 < 0) { |
e7b84f9d | 181 | pr_err("cannot open device file %s\n", dv); |
4725bc31 N |
182 | close(nfd); |
183 | free(st); | |
e5329c37 NB |
184 | return 1; |
185 | } | |
3da92f27 NB |
186 | |
187 | if (st->ss->load_super(st, fd2, NULL)) { | |
e7b84f9d | 188 | pr_err("cannot find super block on %s\n", dv); |
4725bc31 | 189 | close(nfd); |
e5329c37 | 190 | close(fd2); |
4725bc31 | 191 | free(st); |
e5329c37 NB |
192 | return 1; |
193 | } | |
194 | close(fd2); | |
195 | } | |
196 | /* Ok, looks good. Lets update the superblock and write it out to | |
197 | * newdev. | |
198 | */ | |
aba69144 | 199 | |
4b1ac34b NB |
200 | info.disk.number = d; |
201 | info.disk.major = major(stb.st_rdev); | |
202 | info.disk.minor = minor(stb.st_rdev); | |
203 | info.disk.raid_disk = d; | |
204 | info.disk.state = (1 << MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE); | |
3da92f27 | 205 | st->ss->update_super(st, &info, "linear-grow-new", newdev, |
f752781f | 206 | 0, 0, NULL); |
e5329c37 | 207 | |
3da92f27 | 208 | if (st->ss->store_super(st, nfd)) { |
e7b84f9d | 209 | pr_err("Cannot store new superblock on %s\n", |
f752781f | 210 | newdev); |
e5329c37 NB |
211 | close(nfd); |
212 | return 1; | |
213 | } | |
e5329c37 | 214 | close(nfd); |
4b1ac34b NB |
215 | |
216 | if (ioctl(fd, ADD_NEW_DISK, &info.disk) != 0) { | |
e7b84f9d | 217 | pr_err("Cannot add new disk to this array\n"); |
e5329c37 NB |
218 | return 1; |
219 | } | |
220 | /* Well, that seems to have worked. | |
221 | * Now go through and update all superblocks | |
222 | */ | |
223 | ||
9cd39f01 | 224 | if (md_get_array_info(fd, &info.array) < 0) { |
e7b84f9d | 225 | pr_err("cannot get array info for %s\n", devname); |
e5329c37 NB |
226 | return 1; |
227 | } | |
228 | ||
229 | nd = d; | |
4b1ac34b | 230 | for (d=0 ; d < info.array.raid_disks ; d++) { |
e5329c37 NB |
231 | mdu_disk_info_t disk; |
232 | char *dv; | |
233 | ||
234 | disk.number = d; | |
d97572f5 | 235 | if (md_get_disk_info(fd, &disk) < 0) { |
e7b84f9d | 236 | pr_err("cannot get device detail for device %d\n", |
e5329c37 NB |
237 | d); |
238 | return 1; | |
239 | } | |
16c6fa80 | 240 | dv = map_dev(disk.major, disk.minor, 1); |
e5329c37 | 241 | if (!dv) { |
e7b84f9d | 242 | pr_err("cannot find device file for device %d\n", |
e5329c37 NB |
243 | d); |
244 | return 1; | |
245 | } | |
16c6fa80 | 246 | fd2 = dev_open(dv, O_RDWR); |
e5329c37 | 247 | if (fd2 < 0) { |
e7b84f9d | 248 | pr_err("cannot open device file %s\n", dv); |
e5329c37 NB |
249 | return 1; |
250 | } | |
3da92f27 | 251 | if (st->ss->load_super(st, fd2, NULL)) { |
e7b84f9d | 252 | pr_err("cannot find super block on %s\n", dv); |
e5329c37 NB |
253 | close(fd); |
254 | return 1; | |
255 | } | |
4b1ac34b NB |
256 | info.array.raid_disks = nd+1; |
257 | info.array.nr_disks = nd+1; | |
258 | info.array.active_disks = nd+1; | |
259 | info.array.working_disks = nd+1; | |
f752781f | 260 | |
3da92f27 | 261 | st->ss->update_super(st, &info, "linear-grow-update", dv, |
f752781f | 262 | 0, 0, NULL); |
aba69144 | 263 | |
3da92f27 | 264 | if (st->ss->store_super(st, fd2)) { |
e7b84f9d | 265 | pr_err("Cannot store new superblock on %s\n", dv); |
e5329c37 NB |
266 | close(fd2); |
267 | return 1; | |
268 | } | |
269 | close(fd2); | |
270 | } | |
271 | ||
272 | return 0; | |
273 | } | |
f5e166fe | 274 | |
50f01ba5 | 275 | int Grow_addbitmap(char *devname, int fd, struct context *c, struct shape *s) |
f5e166fe NB |
276 | { |
277 | /* | |
278 | * First check that array doesn't have a bitmap | |
279 | * Then create the bitmap | |
280 | * Then add it | |
281 | * | |
282 | * For internal bitmaps, we need to check the version, | |
283 | * find all the active devices, and write the bitmap block | |
284 | * to all devices | |
285 | */ | |
286 | mdu_bitmap_file_t bmf; | |
287 | mdu_array_info_t array; | |
288 | struct supertype *st; | |
4725bc31 | 289 | char *subarray = NULL; |
dcec9ee5 | 290 | int major = BITMAP_MAJOR_HI; |
8fac0577 | 291 | unsigned long long bitmapsize, array_size; |
e97a7cd0 | 292 | struct mdinfo *mdi; |
dcec9ee5 | 293 | |
efdfcc9e JS |
294 | /* |
295 | * We only ever get called if s->bitmap_file is != NULL, so this check | |
296 | * is just here to quiet down static code checkers. | |
297 | */ | |
298 | if (!s->bitmap_file) | |
299 | return 1; | |
300 | ||
301 | if (strcmp(s->bitmap_file, "clustered") == 0) | |
6d9c7c25 GR |
302 | major = BITMAP_MAJOR_CLUSTERED; |
303 | ||
f5e166fe | 304 | if (ioctl(fd, GET_BITMAP_FILE, &bmf) != 0) { |
353632d9 | 305 | if (errno == ENOMEM) |
e7b84f9d | 306 | pr_err("Memory allocation failure.\n"); |
f5e166fe | 307 | else |
e7b84f9d | 308 | pr_err("bitmaps not supported by this kernel.\n"); |
f5e166fe NB |
309 | return 1; |
310 | } | |
311 | if (bmf.pathname[0]) { | |
6ac963ce JS |
312 | if (strcmp(s->bitmap_file,"none") == 0) { |
313 | if (ioctl(fd, SET_BITMAP_FILE, -1) != 0) { | |
e7b84f9d | 314 | pr_err("failed to remove bitmap %s\n", |
fe80f49b NB |
315 | bmf.pathname); |
316 | return 1; | |
317 | } | |
318 | return 0; | |
319 | } | |
e7b84f9d | 320 | pr_err("%s already has a bitmap (%s)\n", |
f5e166fe NB |
321 | devname, bmf.pathname); |
322 | return 1; | |
323 | } | |
9cd39f01 | 324 | if (md_get_array_info(fd, &array) != 0) { |
e7b84f9d | 325 | pr_err("cannot get array status for %s\n", devname); |
f5e166fe NB |
326 | return 1; |
327 | } | |
6ac963ce | 328 | if (array.state & (1 << MD_SB_BITMAP_PRESENT)) { |
50f01ba5 | 329 | if (strcmp(s->bitmap_file, "none")==0) { |
6ac963ce | 330 | array.state &= ~(1 << MD_SB_BITMAP_PRESENT); |
018a4882 | 331 | if (md_set_array_info(fd, &array) != 0) { |
6ac963ce | 332 | if (array.state & (1 << MD_SB_CLUSTERED)) |
37d0ca9b GJ |
333 | pr_err("failed to remove clustered bitmap.\n"); |
334 | else | |
335 | pr_err("failed to remove internal bitmap.\n"); | |
fe80f49b NB |
336 | return 1; |
337 | } | |
338 | return 0; | |
339 | } | |
37d0ca9b | 340 | pr_err("bitmap already present on %s\n", devname); |
f5e166fe NB |
341 | return 1; |
342 | } | |
4725bc31 | 343 | |
50f01ba5 | 344 | if (strcmp(s->bitmap_file, "none") == 0) { |
e7b84f9d | 345 | pr_err("no bitmap found on %s\n", devname); |
4725bc31 N |
346 | return 1; |
347 | } | |
5b28bd56 | 348 | if (array.level <= 0) { |
e7b84f9d | 349 | pr_err("Bitmaps not meaningful with level %s\n", |
5b28bd56 NB |
350 | map_num(pers, array.level)?:"of this array"); |
351 | return 1; | |
352 | } | |
8fac0577 NB |
353 | bitmapsize = array.size; |
354 | bitmapsize <<= 1; | |
beae1dfe | 355 | if (get_dev_size(fd, NULL, &array_size) && |
6ac963ce | 356 | array_size > (0x7fffffffULL << 9)) { |
8fac0577 NB |
357 | /* Array is big enough that we cannot trust array.size |
358 | * try other approaches | |
359 | */ | |
360 | bitmapsize = get_component_size(fd); | |
361 | } | |
8fac0577 | 362 | if (bitmapsize == 0) { |
e7b84f9d | 363 | pr_err("Cannot reliably determine size of array to create bitmap - sorry.\n"); |
8fac0577 NB |
364 | return 1; |
365 | } | |
366 | ||
f9c25f1d | 367 | if (array.level == 10) { |
6ac963ce JS |
368 | int ncopies; |
369 | ||
370 | ncopies = (array.layout & 255) * ((array.layout >> 8) & 255); | |
f9c25f1d NB |
371 | bitmapsize = bitmapsize * array.raid_disks / ncopies; |
372 | } | |
373 | ||
4725bc31 | 374 | st = super_by_fd(fd, &subarray); |
f5e166fe | 375 | if (!st) { |
e7b84f9d | 376 | pr_err("Cannot understand version %d.%d\n", |
f5e166fe NB |
377 | array.major_version, array.minor_version); |
378 | return 1; | |
379 | } | |
4725bc31 | 380 | if (subarray) { |
e7b84f9d | 381 | pr_err("Cannot add bitmaps to sub-arrays yet\n"); |
4725bc31 N |
382 | free(subarray); |
383 | free(st); | |
fe80f49b | 384 | return 1; |
4725bc31 | 385 | } |
e97a7cd0 AP |
386 | |
387 | mdi = sysfs_read(fd, NULL, GET_CONSISTENCY_POLICY); | |
388 | if (mdi) { | |
389 | if (mdi->consistency_policy == CONSISTENCY_POLICY_PPL) { | |
390 | pr_err("Cannot add bitmap to array with PPL\n"); | |
391 | free(mdi); | |
392 | free(st); | |
393 | return 1; | |
394 | } | |
395 | free(mdi); | |
396 | } | |
397 | ||
7c25f4d7 GJ |
398 | if (strcmp(s->bitmap_file, "internal") == 0 || |
399 | strcmp(s->bitmap_file, "clustered") == 0) { | |
c0c1acd6 | 400 | int rv; |
f5e166fe | 401 | int d; |
c0c1acd6 | 402 | int offset_setable = 0; |
ebeb3663 | 403 | if (st->ss->add_internal_bitmap == NULL) { |
7a862a02 | 404 | pr_err("Internal bitmaps not supported with %s metadata\n", st->ss->name); |
ebeb3663 N |
405 | return 1; |
406 | } | |
7c25f4d7 GJ |
407 | st->nodes = c->nodes; |
408 | st->cluster_name = c->homecluster; | |
4dd2df09 | 409 | mdi = sysfs_read(fd, NULL, GET_BITMAP_LOCATION); |
c0c1acd6 N |
410 | if (mdi) |
411 | offset_setable = 1; | |
6ac963ce | 412 | for (d = 0; d < st->max_devs; d++) { |
f5e166fe NB |
413 | mdu_disk_info_t disk; |
414 | char *dv; | |
dac1b111 JS |
415 | int fd2; |
416 | ||
f5e166fe | 417 | disk.number = d; |
d97572f5 | 418 | if (md_get_disk_info(fd, &disk) < 0) |
f5e166fe | 419 | continue; |
6ac963ce | 420 | if (disk.major == 0 && disk.minor == 0) |
f5e166fe | 421 | continue; |
6ac963ce | 422 | if ((disk.state & (1 << MD_DISK_SYNC)) == 0) |
f5e166fe | 423 | continue; |
16c6fa80 | 424 | dv = map_dev(disk.major, disk.minor, 1); |
dac1b111 JS |
425 | if (!dv) |
426 | continue; | |
427 | fd2 = dev_open(dv, O_RDWR); | |
428 | if (fd2 < 0) | |
429 | continue; | |
c152f361 JS |
430 | rv = st->ss->load_super(st, fd2, NULL); |
431 | if (!rv) { | |
4ed129ac JS |
432 | rv = st->ss->add_internal_bitmap( |
433 | st, &s->bitmap_chunk, c->delay, | |
434 | s->write_behind, bitmapsize, | |
435 | offset_setable, major); | |
436 | if (!rv) { | |
437 | st->ss->write_bitmap(st, fd2, | |
438 | NodeNumUpdate); | |
439 | } else { | |
dac1b111 | 440 | pr_err("failed to create internal bitmap - chunksize problem.\n"); |
f5e166fe | 441 | } |
c152f361 JS |
442 | } else { |
443 | pr_err("failed to load super-block.\n"); | |
f5e166fe | 444 | } |
dac1b111 | 445 | close(fd2); |
4ed129ac JS |
446 | if (rv) |
447 | return 1; | |
f5e166fe | 448 | } |
c0c1acd6 N |
449 | if (offset_setable) { |
450 | st->ss->getinfo_super(st, mdi, NULL); | |
dae13137 JS |
451 | if (sysfs_init(mdi, fd, NULL)) { |
452 | pr_err("failed to intialize sysfs.\n"); | |
453 | free(mdi); | |
454 | } | |
012a8641 JS |
455 | rv = sysfs_set_num_signed(mdi, NULL, "bitmap/location", |
456 | mdi->bitmap_offset); | |
e97a7cd0 | 457 | free(mdi); |
c0c1acd6 | 458 | } else { |
7c25f4d7 | 459 | if (strcmp(s->bitmap_file, "clustered") == 0) |
6ac963ce JS |
460 | array.state |= (1 << MD_SB_CLUSTERED); |
461 | array.state |= (1 << MD_SB_BITMAP_PRESENT); | |
018a4882 | 462 | rv = md_set_array_info(fd, &array); |
c0c1acd6 N |
463 | } |
464 | if (rv < 0) { | |
ff634064 | 465 | if (errno == EBUSY) |
7a862a02 | 466 | pr_err("Cannot add bitmap while array is resyncing or reshaping etc.\n"); |
e7b84f9d | 467 | pr_err("failed to set internal bitmap.\n"); |
f5e166fe NB |
468 | return 1; |
469 | } | |
fe80f49b NB |
470 | } else { |
471 | int uuid[4]; | |
472 | int bitmap_fd; | |
473 | int d; | |
474 | int max_devs = st->max_devs; | |
fe80f49b NB |
475 | |
476 | /* try to load a superblock */ | |
ca3b6696 | 477 | for (d = 0; d < max_devs; d++) { |
fe80f49b NB |
478 | mdu_disk_info_t disk; |
479 | char *dv; | |
480 | int fd2; | |
481 | disk.number = d; | |
d97572f5 | 482 | if (md_get_disk_info(fd, &disk) < 0) |
fe80f49b | 483 | continue; |
6ac963ce JS |
484 | if ((disk.major==0 && disk.minor == 0) || |
485 | (disk.state & (1 << MD_DISK_REMOVED))) | |
fe80f49b | 486 | continue; |
16c6fa80 | 487 | dv = map_dev(disk.major, disk.minor, 1); |
ca3b6696 N |
488 | if (!dv) |
489 | continue; | |
16c6fa80 | 490 | fd2 = dev_open(dv, O_RDONLY); |
e7344e90 JS |
491 | if (fd2 >= 0) { |
492 | if (st->ss->load_super(st, fd2, NULL) == 0) { | |
493 | close(fd2); | |
494 | st->ss->uuid_from_super(st, uuid); | |
495 | break; | |
496 | } | |
fe80f49b | 497 | close(fd2); |
fe80f49b | 498 | } |
fe80f49b NB |
499 | } |
500 | if (d == max_devs) { | |
e7b84f9d | 501 | pr_err("cannot find UUID for array!\n"); |
fe80f49b NB |
502 | return 1; |
503 | } | |
6ac963ce JS |
504 | if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, |
505 | s->bitmap_chunk, c->delay, s->write_behind, | |
506 | bitmapsize, major)) { | |
fe80f49b NB |
507 | return 1; |
508 | } | |
50f01ba5 | 509 | bitmap_fd = open(s->bitmap_file, O_RDWR); |
fe80f49b | 510 | if (bitmap_fd < 0) { |
6ac963ce | 511 | pr_err("weird: %s cannot be opened\n", s->bitmap_file); |
fe80f49b NB |
512 | return 1; |
513 | } | |
514 | if (ioctl(fd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
ff634064 N |
515 | int err = errno; |
516 | if (errno == EBUSY) | |
7a862a02 | 517 | pr_err("Cannot add bitmap while array is resyncing or reshaping etc.\n"); |
e7b84f9d | 518 | pr_err("Cannot set bitmap file for %s: %s\n", |
ff634064 | 519 | devname, strerror(err)); |
fe80f49b NB |
520 | return 1; |
521 | } | |
522 | } | |
f5e166fe NB |
523 | |
524 | return 0; | |
525 | } | |
526 | ||
860f11ed AP |
527 | int Grow_consistency_policy(char *devname, int fd, struct context *c, struct shape *s) |
528 | { | |
529 | struct supertype *st; | |
530 | struct mdinfo *sra; | |
531 | struct mdinfo *sd; | |
532 | char *subarray = NULL; | |
533 | int ret = 0; | |
534 | char container_dev[PATH_MAX]; | |
535 | ||
536 | if (s->consistency_policy != CONSISTENCY_POLICY_RESYNC && | |
537 | s->consistency_policy != CONSISTENCY_POLICY_PPL) { | |
538 | pr_err("Operation not supported for consistency policy %s\n", | |
539 | map_num(consistency_policies, s->consistency_policy)); | |
540 | return 1; | |
541 | } | |
542 | ||
543 | st = super_by_fd(fd, &subarray); | |
544 | if (!st) | |
545 | return 1; | |
546 | ||
547 | sra = sysfs_read(fd, NULL, GET_CONSISTENCY_POLICY|GET_LEVEL| | |
548 | GET_DEVS|GET_STATE); | |
549 | if (!sra) { | |
550 | ret = 1; | |
551 | goto free_st; | |
552 | } | |
553 | ||
554 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL && | |
555 | !st->ss->write_init_ppl) { | |
556 | pr_err("%s metadata does not support PPL\n", st->ss->name); | |
557 | ret = 1; | |
558 | goto free_info; | |
559 | } | |
560 | ||
561 | if (sra->array.level != 5) { | |
562 | pr_err("Operation not supported for array level %d\n", | |
563 | sra->array.level); | |
564 | ret = 1; | |
565 | goto free_info; | |
566 | } | |
567 | ||
568 | if (sra->consistency_policy == (unsigned)s->consistency_policy) { | |
569 | pr_err("Consistency policy is already %s\n", | |
570 | map_num(consistency_policies, s->consistency_policy)); | |
571 | ret = 1; | |
572 | goto free_info; | |
573 | } else if (sra->consistency_policy != CONSISTENCY_POLICY_RESYNC && | |
574 | sra->consistency_policy != CONSISTENCY_POLICY_PPL) { | |
575 | pr_err("Current consistency policy is %s, cannot change to %s\n", | |
576 | map_num(consistency_policies, sra->consistency_policy), | |
577 | map_num(consistency_policies, s->consistency_policy)); | |
578 | ret = 1; | |
579 | goto free_info; | |
580 | } | |
581 | ||
582 | if (subarray) { | |
583 | char *update; | |
584 | ||
585 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL) | |
586 | update = "ppl"; | |
587 | else | |
588 | update = "no-ppl"; | |
589 | ||
590 | sprintf(container_dev, "/dev/%s", st->container_devnm); | |
591 | ||
592 | ret = Update_subarray(container_dev, subarray, update, NULL, | |
593 | c->verbose); | |
594 | if (ret) | |
595 | goto free_info; | |
596 | } | |
597 | ||
598 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL) { | |
599 | struct mdinfo info; | |
600 | ||
601 | if (subarray) { | |
602 | struct mdinfo *mdi; | |
603 | int cfd; | |
604 | ||
605 | cfd = open(container_dev, O_RDWR|O_EXCL); | |
606 | if (cfd < 0) { | |
607 | pr_err("Failed to open %s\n", container_dev); | |
608 | ret = 1; | |
609 | goto free_info; | |
610 | } | |
611 | ||
612 | ret = st->ss->load_container(st, cfd, st->container_devnm); | |
613 | close(cfd); | |
614 | ||
615 | if (ret) { | |
616 | pr_err("Cannot read superblock for %s\n", | |
617 | container_dev); | |
618 | goto free_info; | |
619 | } | |
620 | ||
621 | mdi = st->ss->container_content(st, subarray); | |
622 | info = *mdi; | |
623 | free(mdi); | |
624 | } | |
625 | ||
626 | for (sd = sra->devs; sd; sd = sd->next) { | |
627 | int dfd; | |
628 | char *devpath; | |
629 | ||
630 | if ((sd->disk.state & (1 << MD_DISK_SYNC)) == 0) | |
631 | continue; | |
632 | ||
633 | devpath = map_dev(sd->disk.major, sd->disk.minor, 0); | |
634 | dfd = dev_open(devpath, O_RDWR); | |
635 | if (dfd < 0) { | |
636 | pr_err("Failed to open %s\n", devpath); | |
637 | ret = 1; | |
638 | goto free_info; | |
639 | } | |
640 | ||
641 | if (!subarray) { | |
642 | ret = st->ss->load_super(st, dfd, NULL); | |
643 | if (ret) { | |
644 | pr_err("Failed to load super-block.\n"); | |
645 | close(dfd); | |
646 | goto free_info; | |
647 | } | |
648 | ||
649 | ret = st->ss->update_super(st, sra, "ppl", devname, | |
650 | c->verbose, 0, NULL); | |
651 | if (ret) { | |
652 | close(dfd); | |
653 | st->ss->free_super(st); | |
654 | goto free_info; | |
655 | } | |
656 | st->ss->getinfo_super(st, &info, NULL); | |
657 | } | |
658 | ||
659 | ret |= sysfs_set_num(sra, sd, "ppl_sector", info.ppl_sector); | |
660 | ret |= sysfs_set_num(sra, sd, "ppl_size", info.ppl_size); | |
661 | ||
662 | if (ret) { | |
663 | pr_err("Failed to set PPL attributes for %s\n", | |
664 | sd->sys_name); | |
665 | close(dfd); | |
666 | st->ss->free_super(st); | |
667 | goto free_info; | |
668 | } | |
669 | ||
670 | ret = st->ss->write_init_ppl(st, &info, dfd); | |
671 | if (ret) | |
672 | pr_err("Failed to write PPL\n"); | |
673 | ||
674 | close(dfd); | |
675 | ||
676 | if (!subarray) | |
677 | st->ss->free_super(st); | |
678 | ||
679 | if (ret) | |
680 | goto free_info; | |
681 | } | |
682 | } | |
683 | ||
684 | ret = sysfs_set_str(sra, NULL, "consistency_policy", | |
685 | map_num(consistency_policies, | |
686 | s->consistency_policy)); | |
687 | if (ret) | |
688 | pr_err("Failed to change array consistency policy\n"); | |
689 | ||
690 | free_info: | |
691 | sysfs_free(sra); | |
692 | free_st: | |
693 | free(st); | |
694 | free(subarray); | |
695 | ||
696 | return ret; | |
697 | } | |
698 | ||
e86c9dd6 NB |
699 | /* |
700 | * When reshaping an array we might need to backup some data. | |
701 | * This is written to all spares with a 'super_block' describing it. | |
ff94fb86 | 702 | * The superblock goes 4K from the end of the used space on the |
e86c9dd6 NB |
703 | * device. |
704 | * It if written after the backup is complete. | |
705 | * It has the following structure. | |
706 | */ | |
707 | ||
5fdf37e3 | 708 | static struct mdp_backup_super { |
7236ee7a | 709 | char magic[16]; /* md_backup_data-1 or -2 */ |
e86c9dd6 NB |
710 | __u8 set_uuid[16]; |
711 | __u64 mtime; | |
712 | /* start/sizes in 512byte sectors */ | |
7236ee7a | 713 | __u64 devstart; /* address on backup device/file of data */ |
e86c9dd6 NB |
714 | __u64 arraystart; |
715 | __u64 length; | |
716 | __u32 sb_csum; /* csum of preceeding bytes. */ | |
7236ee7a N |
717 | __u32 pad1; |
718 | __u64 devstart2; /* offset in to data of second section */ | |
719 | __u64 arraystart2; | |
720 | __u64 length2; | |
721 | __u32 sb_csum2; /* csum of preceeding bytes. */ | |
722 | __u8 pad[512-68-32]; | |
5fdf37e3 | 723 | } __attribute__((aligned(512))) bsb, bsb2; |
e86c9dd6 | 724 | |
4411fb17 | 725 | static __u32 bsb_csum(char *buf, int len) |
e86c9dd6 NB |
726 | { |
727 | int i; | |
728 | int csum = 0; | |
ca3b6696 | 729 | for (i = 0; i < len; i++) |
e86c9dd6 NB |
730 | csum = (csum<<3) + buf[0]; |
731 | return __cpu_to_le32(csum); | |
732 | } | |
733 | ||
d7ca196c N |
734 | static int check_idle(struct supertype *st) |
735 | { | |
736 | /* Check that all member arrays for this container, or the | |
737 | * container of this array, are idle | |
738 | */ | |
4dd2df09 N |
739 | char *container = (st->container_devnm[0] |
740 | ? st->container_devnm : st->devnm); | |
d7ca196c N |
741 | struct mdstat_ent *ent, *e; |
742 | int is_idle = 1; | |
24daa16f | 743 | |
d7ca196c N |
744 | ent = mdstat_read(0, 0); |
745 | for (e = ent ; e; e = e->next) { | |
746 | if (!is_container_member(e, container)) | |
747 | continue; | |
748 | if (e->percent >= 0) { | |
749 | is_idle = 0; | |
750 | break; | |
751 | } | |
752 | } | |
753 | free_mdstat(ent); | |
754 | return is_idle; | |
755 | } | |
756 | ||
7f2ba464 | 757 | static int freeze_container(struct supertype *st) |
7236ee7a | 758 | { |
4dd2df09 N |
759 | char *container = (st->container_devnm[0] |
760 | ? st->container_devnm : st->devnm); | |
7f2ba464 | 761 | |
d7ca196c N |
762 | if (!check_idle(st)) |
763 | return -1; | |
24daa16f | 764 | |
7f2ba464 | 765 | if (block_monitor(container, 1)) { |
e7b84f9d | 766 | pr_err("failed to freeze container\n"); |
7f2ba464 DW |
767 | return -2; |
768 | } | |
769 | ||
770 | return 1; | |
771 | } | |
772 | ||
773 | static void unfreeze_container(struct supertype *st) | |
774 | { | |
4dd2df09 N |
775 | char *container = (st->container_devnm[0] |
776 | ? st->container_devnm : st->devnm); | |
7f2ba464 DW |
777 | |
778 | unblock_monitor(container, 1); | |
779 | } | |
780 | ||
781 | static int freeze(struct supertype *st) | |
782 | { | |
783 | /* Try to freeze resync/rebuild on this array/container. | |
7236ee7a | 784 | * Return -1 if the array is busy, |
7f2ba464 | 785 | * return -2 container cannot be frozen, |
7236ee7a N |
786 | * return 0 if this kernel doesn't support 'frozen' |
787 | * return 1 if it worked. | |
788 | */ | |
7f2ba464 DW |
789 | if (st->ss->external) |
790 | return freeze_container(st); | |
791 | else { | |
4dd2df09 | 792 | struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION); |
7f2ba464 | 793 | int err; |
815c8a7e | 794 | char buf[20]; |
7f2ba464 DW |
795 | |
796 | if (!sra) | |
797 | return -1; | |
815c8a7e N |
798 | /* Need to clear any 'read-auto' status */ |
799 | if (sysfs_get_str(sra, NULL, "array_state", buf, 20) > 0 && | |
800 | strncmp(buf, "read-auto", 9) == 0) | |
801 | sysfs_set_str(sra, NULL, "array_state", "clean"); | |
802 | ||
7f2ba464 DW |
803 | err = sysfs_freeze_array(sra); |
804 | sysfs_free(sra); | |
805 | return err; | |
806 | } | |
7236ee7a N |
807 | } |
808 | ||
9202b8eb | 809 | static void unfreeze(struct supertype *st) |
7236ee7a | 810 | { |
7f2ba464 DW |
811 | if (st->ss->external) |
812 | return unfreeze_container(st); | |
813 | else { | |
4dd2df09 | 814 | struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION); |
5e7be838 | 815 | char buf[20]; |
7f2ba464 | 816 | |
5e7be838 N |
817 | if (sra && |
818 | sysfs_get_str(sra, NULL, "sync_action", buf, 20) > 0 | |
62844a4d | 819 | && strcmp(buf, "frozen\n") == 0) |
7f2ba464 | 820 | sysfs_set_str(sra, NULL, "sync_action", "idle"); |
7f2ba464 DW |
821 | sysfs_free(sra); |
822 | } | |
7236ee7a N |
823 | } |
824 | ||
4411fb17 | 825 | static void wait_reshape(struct mdinfo *sra) |
7236ee7a N |
826 | { |
827 | int fd = sysfs_get_fd(sra, NULL, "sync_action"); | |
828 | char action[20]; | |
829 | ||
92a19f1a AK |
830 | if (fd < 0) |
831 | return; | |
832 | ||
efc67e8e N |
833 | while (sysfs_fd_get_str(fd, action, 20) > 0 && |
834 | strncmp(action, "reshape", 7) == 0) | |
835 | sysfs_wait(fd, NULL); | |
92a19f1a | 836 | close(fd); |
7236ee7a | 837 | } |
7bc71196 | 838 | |
7ec0996c LD |
839 | static int reshape_super(struct supertype *st, unsigned long long size, |
840 | int level, int layout, int chunksize, int raid_disks, | |
41784c88 | 841 | int delta_disks, char *backup_file, char *dev, |
016e00f5 | 842 | int direction, int verbose) |
7bc71196 DW |
843 | { |
844 | /* nothing extra to check in the native case */ | |
845 | if (!st->ss->external) | |
846 | return 0; | |
847 | if (!st->ss->reshape_super || | |
848 | !st->ss->manage_reshape) { | |
e7b84f9d | 849 | pr_err("%s metadata does not support reshape\n", |
7bc71196 DW |
850 | st->ss->name); |
851 | return 1; | |
852 | } | |
853 | ||
854 | return st->ss->reshape_super(st, size, level, layout, chunksize, | |
41784c88 | 855 | raid_disks, delta_disks, backup_file, dev, |
016e00f5 | 856 | direction, verbose); |
7bc71196 DW |
857 | } |
858 | ||
859 | static void sync_metadata(struct supertype *st) | |
860 | { | |
861 | if (st->ss->external) { | |
76266030 | 862 | if (st->update_tail) { |
7bc71196 | 863 | flush_metadata_updates(st); |
76266030 N |
864 | st->update_tail = &st->updates; |
865 | } else | |
7bc71196 DW |
866 | st->ss->sync_metadata(st); |
867 | } | |
868 | } | |
869 | ||
870 | static int subarray_set_num(char *container, struct mdinfo *sra, char *name, int n) | |
871 | { | |
872 | /* when dealing with external metadata subarrays we need to be | |
873 | * prepared to handle EAGAIN. The kernel may need to wait for | |
874 | * mdmon to mark the array active so the kernel can handle | |
875 | * allocations/writeback when preparing the reshape action | |
876 | * (md_allow_write()). We temporarily disable safe_mode_delay | |
877 | * to close a race with the array_state going clean before the | |
878 | * next write to raid_disks / stripe_cache_size | |
879 | */ | |
880 | char safe[50]; | |
881 | int rc; | |
882 | ||
883 | /* only 'raid_disks' and 'stripe_cache_size' trigger md_allow_write */ | |
5da9ab98 N |
884 | if (!container || |
885 | (strcmp(name, "raid_disks") != 0 && | |
886 | strcmp(name, "stripe_cache_size") != 0)) | |
7bc71196 DW |
887 | return sysfs_set_num(sra, NULL, name, n); |
888 | ||
889 | rc = sysfs_get_str(sra, NULL, "safe_mode_delay", safe, sizeof(safe)); | |
890 | if (rc <= 0) | |
891 | return -1; | |
892 | sysfs_set_num(sra, NULL, "safe_mode_delay", 0); | |
893 | rc = sysfs_set_num(sra, NULL, name, n); | |
894 | if (rc < 0 && errno == EAGAIN) { | |
895 | ping_monitor(container); | |
896 | /* if we get EAGAIN here then the monitor is not active | |
897 | * so stop trying | |
898 | */ | |
899 | rc = sysfs_set_num(sra, NULL, name, n); | |
900 | } | |
901 | sysfs_set_str(sra, NULL, "safe_mode_delay", safe); | |
902 | return rc; | |
903 | } | |
904 | ||
27a1e5b5 N |
905 | int start_reshape(struct mdinfo *sra, int already_running, |
906 | int before_data_disks, int data_disks) | |
47eb4d5a N |
907 | { |
908 | int err; | |
6937e6d2 AK |
909 | unsigned long long sync_max_to_set; |
910 | ||
0f28668b | 911 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); |
6937e6d2 AK |
912 | err = sysfs_set_num(sra, NULL, "suspend_hi", sra->reshape_progress); |
913 | err = err ?: sysfs_set_num(sra, NULL, "suspend_lo", | |
914 | sra->reshape_progress); | |
27a1e5b5 N |
915 | if (before_data_disks <= data_disks) |
916 | sync_max_to_set = sra->reshape_progress / data_disks; | |
917 | else | |
918 | sync_max_to_set = (sra->component_size * data_disks | |
919 | - sra->reshape_progress) / data_disks; | |
1e971e71 | 920 | if (!already_running) |
6937e6d2 AK |
921 | sysfs_set_num(sra, NULL, "sync_min", sync_max_to_set); |
922 | err = err ?: sysfs_set_num(sra, NULL, "sync_max", sync_max_to_set); | |
ada38ebb N |
923 | if (!already_running && err == 0) { |
924 | int cnt = 5; | |
925 | do { | |
926 | err = sysfs_set_str(sra, NULL, "sync_action", "reshape"); | |
927 | if (err) | |
928 | sleep(1); | |
929 | } while (err && errno == EBUSY && cnt-- > 0); | |
930 | } | |
47eb4d5a N |
931 | return err; |
932 | } | |
933 | ||
934 | void abort_reshape(struct mdinfo *sra) | |
935 | { | |
936 | sysfs_set_str(sra, NULL, "sync_action", "idle"); | |
bf08f6b1 JS |
937 | /* |
938 | * Prior to kernel commit: 23ddff3792f6 ("md: allow suspend_lo and | |
939 | * suspend_hi to decrease as well as increase.") | |
940 | * you could only increase suspend_{lo,hi} unless the region they | |
941 | * covered was empty. So to reset to 0, you need to push suspend_lo | |
942 | * up past suspend_hi first. So to maximize the chance of mdadm | |
943 | * working on all kernels, we want to keep doing that. | |
944 | */ | |
47eb4d5a N |
945 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); |
946 | sysfs_set_num(sra, NULL, "suspend_hi", 0); | |
947 | sysfs_set_num(sra, NULL, "suspend_lo", 0); | |
948 | sysfs_set_num(sra, NULL, "sync_min", 0); | |
84d11e6c N |
949 | // It isn't safe to reset sync_max as we aren't monitoring. |
950 | // Array really should be stopped at this point. | |
47eb4d5a N |
951 | } |
952 | ||
dfe77a9e KW |
953 | int remove_disks_for_takeover(struct supertype *st, |
954 | struct mdinfo *sra, | |
955 | int layout) | |
62a48395 AK |
956 | { |
957 | int nr_of_copies; | |
958 | struct mdinfo *remaining; | |
959 | int slot; | |
960 | ||
ddab63c7 MD |
961 | if (st->ss->external) { |
962 | int rv = 0; | |
963 | struct mdinfo *arrays = st->ss->container_content(st, NULL); | |
964 | /* | |
965 | * containter_content returns list of arrays in container | |
966 | * If arrays->next is not NULL it means that there are | |
967 | * 2 arrays in container and operation should be blocked | |
968 | */ | |
969 | if (arrays) { | |
970 | if (arrays->next) | |
971 | rv = 1; | |
972 | sysfs_free(arrays); | |
973 | if (rv) { | |
974 | pr_err("Error. Cannot perform operation on /dev/%s\n", st->devnm); | |
975 | pr_err("For this operation it MUST be single array in container\n"); | |
976 | return rv; | |
977 | } | |
978 | } | |
979 | } | |
980 | ||
dfe77a9e KW |
981 | if (sra->array.level == 10) |
982 | nr_of_copies = layout & 0xff; | |
983 | else if (sra->array.level == 1) | |
984 | nr_of_copies = sra->array.raid_disks; | |
985 | else | |
986 | return 1; | |
62a48395 AK |
987 | |
988 | remaining = sra->devs; | |
989 | sra->devs = NULL; | |
990 | /* for each 'copy', select one device and remove from the list. */ | |
991 | for (slot = 0; slot < sra->array.raid_disks; slot += nr_of_copies) { | |
992 | struct mdinfo **diskp; | |
993 | int found = 0; | |
994 | ||
995 | /* Find a working device to keep */ | |
996 | for (diskp = &remaining; *diskp ; diskp = &(*diskp)->next) { | |
997 | struct mdinfo *disk = *diskp; | |
998 | ||
999 | if (disk->disk.raid_disk < slot) | |
1000 | continue; | |
1001 | if (disk->disk.raid_disk >= slot + nr_of_copies) | |
1002 | continue; | |
1003 | if (disk->disk.state & (1<<MD_DISK_REMOVED)) | |
1004 | continue; | |
1005 | if (disk->disk.state & (1<<MD_DISK_FAULTY)) | |
1006 | continue; | |
1007 | if (!(disk->disk.state & (1<<MD_DISK_SYNC))) | |
1008 | continue; | |
1009 | ||
1010 | /* We have found a good disk to use! */ | |
1011 | *diskp = disk->next; | |
1012 | disk->next = sra->devs; | |
1013 | sra->devs = disk; | |
1014 | found = 1; | |
1015 | break; | |
1016 | } | |
1017 | if (!found) | |
1018 | break; | |
1019 | } | |
1020 | ||
1021 | if (slot < sra->array.raid_disks) { | |
1022 | /* didn't find all slots */ | |
1023 | struct mdinfo **e; | |
1024 | e = &remaining; | |
1025 | while (*e) | |
1026 | e = &(*e)->next; | |
1027 | *e = sra->devs; | |
1028 | sra->devs = remaining; | |
1029 | return 1; | |
1030 | } | |
1031 | ||
1032 | /* Remove all 'remaining' devices from the array */ | |
1033 | while (remaining) { | |
1034 | struct mdinfo *sd = remaining; | |
1035 | remaining = sd->next; | |
1036 | ||
1037 | sysfs_set_str(sra, sd, "state", "faulty"); | |
1038 | sysfs_set_str(sra, sd, "slot", "none"); | |
d5ca4a23 KW |
1039 | /* for external metadata disks should be removed in mdmon */ |
1040 | if (!st->ss->external) | |
1041 | sysfs_set_str(sra, sd, "state", "remove"); | |
62a48395 AK |
1042 | sd->disk.state |= (1<<MD_DISK_REMOVED); |
1043 | sd->disk.state &= ~(1<<MD_DISK_SYNC); | |
1044 | sd->next = sra->devs; | |
1045 | sra->devs = sd; | |
1046 | } | |
1047 | return 0; | |
1048 | } | |
1049 | ||
130994cb AK |
1050 | void reshape_free_fdlist(int *fdlist, |
1051 | unsigned long long *offsets, | |
1052 | int size) | |
1053 | { | |
1054 | int i; | |
1055 | ||
1056 | for (i = 0; i < size; i++) | |
1057 | if (fdlist[i] >= 0) | |
1058 | close(fdlist[i]); | |
1059 | ||
1060 | free(fdlist); | |
1061 | free(offsets); | |
1062 | } | |
1063 | ||
1064 | int reshape_prepare_fdlist(char *devname, | |
1065 | struct mdinfo *sra, | |
1066 | int raid_disks, | |
1067 | int nrdisks, | |
1068 | unsigned long blocks, | |
1069 | char *backup_file, | |
1070 | int *fdlist, | |
1071 | unsigned long long *offsets) | |
1072 | { | |
1073 | int d = 0; | |
1074 | struct mdinfo *sd; | |
1075 | ||
a7dec3fd | 1076 | enable_fds(nrdisks); |
130994cb AK |
1077 | for (d = 0; d <= nrdisks; d++) |
1078 | fdlist[d] = -1; | |
1079 | d = raid_disks; | |
1080 | for (sd = sra->devs; sd; sd = sd->next) { | |
1081 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
1082 | continue; | |
8e7ddc5f N |
1083 | if (sd->disk.state & (1<<MD_DISK_SYNC) && |
1084 | sd->disk.raid_disk < raid_disks) { | |
130994cb AK |
1085 | char *dn = map_dev(sd->disk.major, |
1086 | sd->disk.minor, 1); | |
1087 | fdlist[sd->disk.raid_disk] | |
1088 | = dev_open(dn, O_RDONLY); | |
1089 | offsets[sd->disk.raid_disk] = sd->data_offset*512; | |
1090 | if (fdlist[sd->disk.raid_disk] < 0) { | |
e7b84f9d N |
1091 | pr_err("%s: cannot open component %s\n", |
1092 | devname, dn ? dn : "-unknown-"); | |
130994cb AK |
1093 | d = -1; |
1094 | goto release; | |
1095 | } | |
1096 | } else if (backup_file == NULL) { | |
1097 | /* spare */ | |
1098 | char *dn = map_dev(sd->disk.major, | |
1099 | sd->disk.minor, 1); | |
1100 | fdlist[d] = dev_open(dn, O_RDWR); | |
1101 | offsets[d] = (sd->data_offset + sra->component_size - blocks - 8)*512; | |
1102 | if (fdlist[d] < 0) { | |
e7b84f9d | 1103 | pr_err("%s: cannot open component %s\n", |
130994cb AK |
1104 | devname, dn ? dn : "-unknown-"); |
1105 | d = -1; | |
1106 | goto release; | |
1107 | } | |
1108 | d++; | |
1109 | } | |
1110 | } | |
1111 | release: | |
1112 | return d; | |
1113 | } | |
1114 | ||
e6e9d47b AK |
1115 | int reshape_open_backup_file(char *backup_file, |
1116 | int fd, | |
1117 | char *devname, | |
1118 | long blocks, | |
1119 | int *fdlist, | |
a93f87ee | 1120 | unsigned long long *offsets, |
54ded86f | 1121 | char *sys_name, |
a93f87ee | 1122 | int restart) |
e6e9d47b AK |
1123 | { |
1124 | /* Return 1 on success, 0 on any form of failure */ | |
1125 | /* need to check backup file is large enough */ | |
1126 | char buf[512]; | |
1127 | struct stat stb; | |
1128 | unsigned int dev; | |
1129 | int i; | |
1130 | ||
a93f87ee | 1131 | *fdlist = open(backup_file, O_RDWR|O_CREAT|(restart ? O_TRUNC : O_EXCL), |
e6e9d47b AK |
1132 | S_IRUSR | S_IWUSR); |
1133 | *offsets = 8 * 512; | |
1134 | if (*fdlist < 0) { | |
e7b84f9d | 1135 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
1136 | devname, backup_file, strerror(errno)); |
1137 | return 0; | |
1138 | } | |
1139 | /* Guard against backup file being on array device. | |
1140 | * If array is partitioned or if LVM etc is in the | |
1141 | * way this will not notice, but it is better than | |
1142 | * nothing. | |
1143 | */ | |
1144 | fstat(*fdlist, &stb); | |
1145 | dev = stb.st_dev; | |
1146 | fstat(fd, &stb); | |
1147 | if (stb.st_rdev == dev) { | |
7a862a02 | 1148 | pr_err("backup file must NOT be on the array being reshaped.\n"); |
e6e9d47b AK |
1149 | close(*fdlist); |
1150 | return 0; | |
1151 | } | |
1152 | ||
1153 | memset(buf, 0, 512); | |
ca4fe0bf | 1154 | for (i=0; i < blocks + 8 ; i++) { |
e6e9d47b | 1155 | if (write(*fdlist, buf, 512) != 512) { |
7a862a02 | 1156 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
1157 | devname, backup_file, strerror(errno)); |
1158 | return 0; | |
1159 | } | |
1160 | } | |
1161 | if (fsync(*fdlist) != 0) { | |
e7b84f9d | 1162 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
1163 | devname, backup_file, strerror(errno)); |
1164 | return 0; | |
1165 | } | |
1166 | ||
54ded86f N |
1167 | if (!restart && strncmp(backup_file, MAP_DIR, strlen(MAP_DIR)) != 0) { |
1168 | char *bu = make_backup(sys_name); | |
1e60caeb | 1169 | if (symlink(backup_file, bu)) |
a5a6a7d9 | 1170 | pr_err("Recording backup file in " MAP_DIR " failed: %s\n", |
1e60caeb | 1171 | strerror(errno)); |
54ded86f N |
1172 | free(bu); |
1173 | } | |
1174 | ||
e6e9d47b AK |
1175 | return 1; |
1176 | } | |
1177 | ||
1c009fc2 AK |
1178 | unsigned long compute_backup_blocks(int nchunk, int ochunk, |
1179 | unsigned int ndata, unsigned int odata) | |
1180 | { | |
1181 | unsigned long a, b, blocks; | |
1182 | /* So how much do we need to backup. | |
1183 | * We need an amount of data which is both a whole number of | |
1184 | * old stripes and a whole number of new stripes. | |
1185 | * So LCM for (chunksize*datadisks). | |
1186 | */ | |
1187 | a = (ochunk/512) * odata; | |
1188 | b = (nchunk/512) * ndata; | |
1189 | /* Find GCD */ | |
b48e2e25 | 1190 | a = GCD(a, b); |
1c009fc2 AK |
1191 | /* LCM == product / GCD */ |
1192 | blocks = (ochunk/512) * (nchunk/512) * odata * ndata / a; | |
1193 | ||
1194 | return blocks; | |
1195 | } | |
1196 | ||
a73b0081 | 1197 | char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re) |
5da9ab98 N |
1198 | { |
1199 | /* Based on the current array state in info->array and | |
1200 | * the changes in info->new_* etc, determine: | |
1201 | * - whether the change is possible | |
1202 | * - Intermediate level/raid_disks/layout | |
1203 | * - whether a restriping reshape is needed | |
1204 | * - number of sectors in minimum change unit. This | |
1205 | * will cover a whole number of stripes in 'before' and | |
1206 | * 'after'. | |
1207 | * | |
1208 | * Return message if the change should be rejected | |
1209 | * NULL if the change can be achieved | |
1210 | * | |
1211 | * This can be called as part of starting a reshape, or | |
1212 | * when assembling an array that is undergoing reshape. | |
1213 | */ | |
19ceb16d | 1214 | int near, far, offset, copies; |
5da9ab98 | 1215 | int new_disks; |
19ceb16d | 1216 | int old_chunk, new_chunk; |
b545e14a N |
1217 | /* delta_parity records change in number of devices |
1218 | * caused by level change | |
1219 | */ | |
1220 | int delta_parity = 0; | |
5da9ab98 | 1221 | |
6b2fc3c1 N |
1222 | memset(re, 0, sizeof(*re)); |
1223 | ||
5da9ab98 N |
1224 | /* If a new level not explicitly given, we assume no-change */ |
1225 | if (info->new_level == UnSet) | |
1226 | info->new_level = info->array.level; | |
1227 | ||
1228 | if (info->new_chunk) | |
1229 | switch (info->new_level) { | |
1230 | case 0: | |
1231 | case 4: | |
1232 | case 5: | |
1233 | case 6: | |
1234 | case 10: | |
1235 | /* chunk size is meaningful, must divide component_size | |
1236 | * evenly | |
1237 | */ | |
a73b0081 N |
1238 | if (info->component_size % (info->new_chunk/512)) { |
1239 | unsigned long long shrink = info->component_size; | |
1240 | shrink &= ~(unsigned long long)(info->new_chunk/512-1); | |
1241 | pr_err("New chunk size (%dK) does not evenly divide device size (%lluk)\n", | |
1242 | info->new_chunk/1024, info->component_size/2); | |
1243 | pr_err("After shrinking any filesystem, \"mdadm --grow %s --size %llu\"\n", | |
1244 | devname, shrink/2); | |
1245 | pr_err("will shrink the array so the given chunk size would work.\n"); | |
1246 | return ""; | |
1247 | } | |
5da9ab98 N |
1248 | break; |
1249 | default: | |
1250 | return "chunk size not meaningful for this level"; | |
1251 | } | |
1252 | else | |
1253 | info->new_chunk = info->array.chunk_size; | |
1254 | ||
1255 | switch (info->array.level) { | |
90b60dfa | 1256 | default: |
46643e1a N |
1257 | return "No reshape is possibly for this RAID level"; |
1258 | case LEVEL_LINEAR: | |
1259 | if (info->delta_disks != UnSet) | |
1260 | return "Only --add is supported for LINEAR, setting --raid-disks is not needed"; | |
1261 | else | |
1262 | return "Only --add is supported for LINEAR, other --grow options are not meaningful"; | |
5da9ab98 N |
1263 | case 1: |
1264 | /* RAID1 can convert to RAID1 with different disks, or | |
dfe77a9e KW |
1265 | * raid5 with 2 disks, or |
1266 | * raid0 with 1 disk | |
5da9ab98 | 1267 | */ |
6ebf34e6 | 1268 | if (info->new_level > 1 && (info->component_size & 7)) |
7a862a02 | 1269 | return "Cannot convert RAID1 of this size - reduce size to multiple of 4K first."; |
dfe77a9e | 1270 | if (info->new_level == 0) { |
b545e14a N |
1271 | if (info->delta_disks != UnSet && |
1272 | info->delta_disks != 0) | |
7a862a02 | 1273 | return "Cannot change number of disks with RAID1->RAID0 conversion"; |
dfe77a9e KW |
1274 | re->level = 0; |
1275 | re->before.data_disks = 1; | |
1276 | re->after.data_disks = 1; | |
dfe77a9e KW |
1277 | return NULL; |
1278 | } | |
5da9ab98 N |
1279 | if (info->new_level == 1) { |
1280 | if (info->delta_disks == UnSet) | |
1281 | /* Don't know what to do */ | |
1282 | return "no change requested for Growing RAID1"; | |
1283 | re->level = 1; | |
5da9ab98 N |
1284 | return NULL; |
1285 | } | |
6ebf34e6 | 1286 | if (info->array.raid_disks != 2 && info->new_level == 5) |
a58e0da4 | 1287 | return "Can only convert a 2-device array to RAID5"; |
6ebf34e6 | 1288 | if (info->array.raid_disks == 2 && info->new_level == 5) { |
5da9ab98 | 1289 | re->level = 5; |
5da9ab98 | 1290 | re->before.data_disks = 1; |
5652f2d9 N |
1291 | if (info->delta_disks != UnSet && |
1292 | info->delta_disks != 0) | |
1293 | re->after.data_disks = 1 + info->delta_disks; | |
1294 | else | |
1295 | re->after.data_disks = 1; | |
1296 | if (re->after.data_disks < 1) | |
1297 | return "Number of disks too small for RAID5"; | |
1298 | ||
5da9ab98 | 1299 | re->before.layout = ALGORITHM_LEFT_SYMMETRIC; |
446d2a5a N |
1300 | info->array.chunk_size = 65536; |
1301 | break; | |
5da9ab98 N |
1302 | } |
1303 | /* Could do some multi-stage conversions, but leave that to | |
1304 | * later. | |
1305 | */ | |
1306 | return "Impossibly level change request for RAID1"; | |
1307 | ||
1308 | case 10: | |
19ceb16d N |
1309 | /* RAID10 can be converted from near mode to |
1310 | * RAID0 by removing some devices. | |
1311 | * It can also be reshaped if the kernel supports | |
1312 | * new_data_offset. | |
5da9ab98 | 1313 | */ |
19ceb16d N |
1314 | switch (info->new_level) { |
1315 | case 0: | |
1316 | if ((info->array.layout & ~0xff) != 0x100) | |
1317 | return "Cannot Grow RAID10 with far/offset layout"; | |
1318 | /* number of devices must be multiple of number of copies */ | |
1319 | if (info->array.raid_disks % (info->array.layout & 0xff)) | |
1320 | return "RAID10 layout too complex for Grow operation"; | |
1321 | ||
1322 | new_disks = (info->array.raid_disks | |
1323 | / (info->array.layout & 0xff)); | |
1324 | if (info->delta_disks == UnSet) | |
1325 | info->delta_disks = (new_disks | |
1326 | - info->array.raid_disks); | |
5da9ab98 | 1327 | |
19ceb16d N |
1328 | if (info->delta_disks != new_disks - info->array.raid_disks) |
1329 | return "New number of raid-devices impossible for RAID10"; | |
1330 | if (info->new_chunk && | |
1331 | info->new_chunk != info->array.chunk_size) | |
1332 | return "Cannot change chunk-size with RAID10 Grow"; | |
1333 | ||
1334 | /* looks good */ | |
1335 | re->level = 0; | |
19ceb16d N |
1336 | re->before.data_disks = new_disks; |
1337 | re->after.data_disks = re->before.data_disks; | |
19ceb16d N |
1338 | return NULL; |
1339 | ||
1340 | case 10: | |
1341 | near = info->array.layout & 0xff; | |
1342 | far = (info->array.layout >> 8) & 0xff; | |
1343 | offset = info->array.layout & 0x10000; | |
1344 | if (far > 1 && !offset) | |
1345 | return "Cannot reshape RAID10 in far-mode"; | |
1346 | copies = near * far; | |
1347 | ||
1348 | old_chunk = info->array.chunk_size * far; | |
1349 | ||
1350 | if (info->new_layout == UnSet) | |
1351 | info->new_layout = info->array.layout; | |
1352 | else { | |
1353 | near = info->new_layout & 0xff; | |
1354 | far = (info->new_layout >> 8) & 0xff; | |
1355 | offset = info->new_layout & 0x10000; | |
1356 | if (far > 1 && !offset) | |
1357 | return "Cannot reshape RAID10 to far-mode"; | |
1358 | if (near * far != copies) | |
7a862a02 | 1359 | return "Cannot change number of copies when reshaping RAID10"; |
19ceb16d N |
1360 | } |
1361 | if (info->delta_disks == UnSet) | |
1362 | info->delta_disks = 0; | |
1363 | new_disks = (info->array.raid_disks + | |
1364 | info->delta_disks); | |
1365 | ||
1366 | new_chunk = info->new_chunk * far; | |
1367 | ||
1368 | re->level = 10; | |
19ceb16d N |
1369 | re->before.layout = info->array.layout; |
1370 | re->before.data_disks = info->array.raid_disks; | |
1371 | re->after.layout = info->new_layout; | |
1372 | re->after.data_disks = new_disks; | |
89ecd3cf N |
1373 | /* For RAID10 we don't do backup but do allow reshape, |
1374 | * so set backup_blocks to INVALID_SECTORS rather than | |
1375 | * zero. | |
1376 | * And there is no need to synchronise stripes on both | |
19ceb16d N |
1377 | * 'old' and 'new'. So the important |
1378 | * number is the minimum data_offset difference | |
1379 | * which is the larger of (offset copies * chunk). | |
1380 | */ | |
89ecd3cf N |
1381 | re->backup_blocks = INVALID_SECTORS; |
1382 | re->min_offset_change = max(old_chunk, new_chunk) / 512; | |
ee2429e0 | 1383 | if (new_disks < re->before.data_disks && |
89ecd3cf | 1384 | info->space_after < re->min_offset_change) |
ee2429e0 N |
1385 | /* Reduce component size by one chunk */ |
1386 | re->new_size = (info->component_size - | |
89ecd3cf | 1387 | re->min_offset_change); |
ee2429e0 N |
1388 | else |
1389 | re->new_size = info->component_size; | |
1390 | re->new_size = re->new_size * new_disks / copies; | |
19ceb16d | 1391 | return NULL; |
5da9ab98 | 1392 | |
19ceb16d N |
1393 | default: |
1394 | return "RAID10 can only be changed to RAID0"; | |
1395 | } | |
5da9ab98 N |
1396 | case 0: |
1397 | /* RAID0 can be converted to RAID10, or to RAID456 */ | |
1398 | if (info->new_level == 10) { | |
6ebf34e6 JS |
1399 | if (info->new_layout == UnSet && |
1400 | info->delta_disks == UnSet) { | |
5da9ab98 N |
1401 | /* Assume near=2 layout */ |
1402 | info->new_layout = 0x102; | |
1403 | info->delta_disks = info->array.raid_disks; | |
1404 | } | |
1405 | if (info->new_layout == UnSet) { | |
1406 | int copies = 1 + (info->delta_disks | |
1407 | / info->array.raid_disks); | |
1408 | if (info->array.raid_disks * (copies-1) | |
1409 | != info->delta_disks) | |
7a862a02 | 1410 | return "Impossible number of devices for RAID0->RAID10"; |
5da9ab98 N |
1411 | info->new_layout = 0x100 + copies; |
1412 | } | |
1413 | if (info->delta_disks == UnSet) { | |
1414 | int copies = info->new_layout & 0xff; | |
1415 | if (info->new_layout != 0x100 + copies) | |
7a862a02 | 1416 | return "New layout impossible for RAID0->RAID10";; |
5da9ab98 N |
1417 | info->delta_disks = (copies - 1) * |
1418 | info->array.raid_disks; | |
1419 | } | |
1420 | if (info->new_chunk && | |
1421 | info->new_chunk != info->array.chunk_size) | |
1422 | return "Cannot change chunk-size with RAID0->RAID10"; | |
1423 | /* looks good */ | |
1424 | re->level = 10; | |
5da9ab98 N |
1425 | re->before.data_disks = (info->array.raid_disks + |
1426 | info->delta_disks); | |
031d445c | 1427 | re->after.data_disks = re->before.data_disks; |
5da9ab98 | 1428 | re->before.layout = info->new_layout; |
5da9ab98 N |
1429 | return NULL; |
1430 | } | |
1431 | ||
1432 | /* RAID0 can also covert to RAID0/4/5/6 by first converting to | |
1433 | * a raid4 style layout of the final level. | |
1434 | */ | |
1435 | switch (info->new_level) { | |
5da9ab98 | 1436 | case 4: |
b545e14a N |
1437 | delta_parity = 1; |
1438 | case 0: | |
5da9ab98 N |
1439 | re->level = 4; |
1440 | re->before.layout = 0; | |
1441 | break; | |
1442 | case 5: | |
b545e14a | 1443 | delta_parity = 1; |
5da9ab98 N |
1444 | re->level = 5; |
1445 | re->before.layout = ALGORITHM_PARITY_N; | |
e5ba75ce N |
1446 | if (info->new_layout == UnSet) |
1447 | info->new_layout = map_name(r5layout, "default"); | |
5da9ab98 N |
1448 | break; |
1449 | case 6: | |
b545e14a | 1450 | delta_parity = 2; |
5da9ab98 N |
1451 | re->level = 6; |
1452 | re->before.layout = ALGORITHM_PARITY_N; | |
e5ba75ce N |
1453 | if (info->new_layout == UnSet) |
1454 | info->new_layout = map_name(r6layout, "default"); | |
5da9ab98 N |
1455 | break; |
1456 | default: | |
1457 | return "Impossible level change requested"; | |
1458 | } | |
1459 | re->before.data_disks = info->array.raid_disks; | |
1460 | /* determining 'after' layout happens outside this 'switch' */ | |
1461 | break; | |
1462 | ||
1463 | case 4: | |
1464 | info->array.layout = ALGORITHM_PARITY_N; | |
1465 | case 5: | |
1466 | switch (info->new_level) { | |
f0cce442 | 1467 | case 0: |
b545e14a | 1468 | delta_parity = -1; |
5da9ab98 N |
1469 | case 4: |
1470 | re->level = info->array.level; | |
1471 | re->before.data_disks = info->array.raid_disks - 1; | |
1472 | re->before.layout = info->array.layout; | |
1473 | break; | |
1474 | case 5: | |
1475 | re->level = 5; | |
1476 | re->before.data_disks = info->array.raid_disks - 1; | |
1477 | re->before.layout = info->array.layout; | |
1478 | break; | |
1479 | case 6: | |
b545e14a | 1480 | delta_parity = 1; |
5da9ab98 N |
1481 | re->level = 6; |
1482 | re->before.data_disks = info->array.raid_disks - 1; | |
1483 | switch (info->array.layout) { | |
1484 | case ALGORITHM_LEFT_ASYMMETRIC: | |
1485 | re->before.layout = ALGORITHM_LEFT_ASYMMETRIC_6; | |
1486 | break; | |
1487 | case ALGORITHM_RIGHT_ASYMMETRIC: | |
1488 | re->before.layout = ALGORITHM_RIGHT_ASYMMETRIC_6; | |
1489 | break; | |
1490 | case ALGORITHM_LEFT_SYMMETRIC: | |
1491 | re->before.layout = ALGORITHM_LEFT_SYMMETRIC_6; | |
1492 | break; | |
1493 | case ALGORITHM_RIGHT_SYMMETRIC: | |
1494 | re->before.layout = ALGORITHM_RIGHT_SYMMETRIC_6; | |
1495 | break; | |
1496 | case ALGORITHM_PARITY_0: | |
1497 | re->before.layout = ALGORITHM_PARITY_0_6; | |
1498 | break; | |
1499 | case ALGORITHM_PARITY_N: | |
1500 | re->before.layout = ALGORITHM_PARITY_N_6; | |
1501 | break; | |
1502 | default: | |
1503 | return "Cannot convert an array with this layout"; | |
1504 | } | |
1505 | break; | |
1506 | case 1: | |
1507 | if (info->array.raid_disks != 2) | |
1508 | return "Can only convert a 2-device array to RAID1"; | |
b545e14a N |
1509 | if (info->delta_disks != UnSet && |
1510 | info->delta_disks != 0) | |
7a862a02 | 1511 | return "Cannot set raid_disk when converting RAID5->RAID1"; |
5da9ab98 | 1512 | re->level = 1; |
6a67848a N |
1513 | info->new_chunk = 0; |
1514 | return NULL; | |
5da9ab98 N |
1515 | default: |
1516 | return "Impossible level change requested"; | |
1517 | } | |
1518 | break; | |
1519 | case 6: | |
1520 | switch (info->new_level) { | |
1521 | case 4: | |
1522 | case 5: | |
b545e14a | 1523 | delta_parity = -1; |
5da9ab98 N |
1524 | case 6: |
1525 | re->level = 6; | |
1526 | re->before.data_disks = info->array.raid_disks - 2; | |
1527 | re->before.layout = info->array.layout; | |
1528 | break; | |
1529 | default: | |
1530 | return "Impossible level change requested"; | |
1531 | } | |
1532 | break; | |
1533 | } | |
1534 | ||
1535 | /* If we reached here then it looks like a re-stripe is | |
1536 | * happening. We have determined the intermediate level | |
1537 | * and initial raid_disks/layout and stored these in 're'. | |
1538 | * | |
1539 | * We need to deduce the final layout that can be atomically | |
1540 | * converted to the end state. | |
1541 | */ | |
1542 | switch (info->new_level) { | |
1543 | case 0: | |
1544 | /* We can only get to RAID0 from RAID4 or RAID5 | |
1545 | * with appropriate layout and one extra device | |
1546 | */ | |
1547 | if (re->level != 4 && re->level != 5) | |
1548 | return "Cannot covert to RAID0 from this level"; | |
b545e14a | 1549 | |
5da9ab98 N |
1550 | switch (re->level) { |
1551 | case 4: | |
e339dba2 | 1552 | re->before.layout = 0; |
ca3b6696 N |
1553 | re->after.layout = 0; |
1554 | break; | |
5da9ab98 | 1555 | case 5: |
ca3b6696 N |
1556 | re->after.layout = ALGORITHM_PARITY_N; |
1557 | break; | |
5da9ab98 N |
1558 | } |
1559 | break; | |
1560 | ||
1561 | case 4: | |
1562 | /* We can only get to RAID4 from RAID5 */ | |
1563 | if (re->level != 4 && re->level != 5) | |
1564 | return "Cannot convert to RAID4 from this level"; | |
b545e14a | 1565 | |
5da9ab98 N |
1566 | switch (re->level) { |
1567 | case 4: | |
ca3b6696 N |
1568 | re->after.layout = 0; |
1569 | break; | |
5da9ab98 | 1570 | case 5: |
ca3b6696 N |
1571 | re->after.layout = ALGORITHM_PARITY_N; |
1572 | break; | |
5da9ab98 N |
1573 | } |
1574 | break; | |
1575 | ||
1576 | case 5: | |
0073a6e1 | 1577 | /* We get to RAID5 from RAID5 or RAID6 */ |
5da9ab98 N |
1578 | if (re->level != 5 && re->level != 6) |
1579 | return "Cannot convert to RAID5 from this level"; | |
b545e14a | 1580 | |
5da9ab98 N |
1581 | switch (re->level) { |
1582 | case 5: | |
1583 | if (info->new_layout == UnSet) | |
1584 | re->after.layout = re->before.layout; | |
1585 | else | |
1586 | re->after.layout = info->new_layout; | |
1587 | break; | |
1588 | case 6: | |
4a870364 N |
1589 | if (info->new_layout == UnSet) |
1590 | info->new_layout = re->before.layout; | |
1591 | ||
5da9ab98 N |
1592 | /* after.layout needs to be raid6 version of new_layout */ |
1593 | if (info->new_layout == ALGORITHM_PARITY_N) | |
1594 | re->after.layout = ALGORITHM_PARITY_N; | |
1595 | else { | |
1596 | char layout[40]; | |
1597 | char *ls = map_num(r5layout, info->new_layout); | |
1598 | int l; | |
0073a6e1 N |
1599 | if (ls) { |
1600 | /* Current RAID6 layout has a RAID5 | |
1601 | * equivalent - good | |
1602 | */ | |
1603 | strcat(strcpy(layout, ls), "-6"); | |
1604 | l = map_name(r6layout, layout); | |
1605 | if (l == UnSet) | |
7a862a02 | 1606 | return "Cannot find RAID6 layout to convert to"; |
0073a6e1 N |
1607 | } else { |
1608 | /* Current RAID6 has no equivalent. | |
1609 | * If it is already a '-6' layout we | |
1610 | * can leave it unchanged, else we must | |
1611 | * fail | |
1612 | */ | |
1613 | ls = map_num(r6layout, info->new_layout); | |
1614 | if (!ls || | |
1615 | strcmp(ls+strlen(ls)-2, "-6") != 0) | |
1616 | return "Please specify new layout"; | |
1617 | l = info->new_layout; | |
1618 | } | |
5da9ab98 N |
1619 | re->after.layout = l; |
1620 | } | |
1621 | } | |
1622 | break; | |
1623 | ||
1624 | case 6: | |
1625 | /* We must already be at level 6 */ | |
1626 | if (re->level != 6) | |
1627 | return "Impossible level change"; | |
5da9ab98 | 1628 | if (info->new_layout == UnSet) |
4a870364 | 1629 | re->after.layout = info->array.layout; |
5da9ab98 N |
1630 | else |
1631 | re->after.layout = info->new_layout; | |
1632 | break; | |
1633 | default: | |
1634 | return "Impossible level change requested"; | |
1635 | } | |
b545e14a N |
1636 | if (info->delta_disks == UnSet) |
1637 | info->delta_disks = delta_parity; | |
1638 | ||
6ebf34e6 JS |
1639 | re->after.data_disks = |
1640 | (re->before.data_disks + info->delta_disks - delta_parity); | |
1641 | ||
5da9ab98 | 1642 | switch (re->level) { |
6ebf34e6 JS |
1643 | case 6: |
1644 | re->parity = 2; | |
ca3b6696 | 1645 | break; |
5da9ab98 | 1646 | case 4: |
6ebf34e6 JS |
1647 | case 5: |
1648 | re->parity = 1; | |
ca3b6696 | 1649 | break; |
6ebf34e6 JS |
1650 | default: |
1651 | re->parity = 0; | |
ca3b6696 | 1652 | break; |
5da9ab98 N |
1653 | } |
1654 | /* So we have a restripe operation, we need to calculate the number | |
1655 | * of blocks per reshape operation. | |
1656 | */ | |
ddbf2ebb | 1657 | re->new_size = info->component_size * re->before.data_disks; |
5da9ab98 N |
1658 | if (info->new_chunk == 0) |
1659 | info->new_chunk = info->array.chunk_size; | |
1660 | if (re->after.data_disks == re->before.data_disks && | |
1661 | re->after.layout == re->before.layout && | |
1662 | info->new_chunk == info->array.chunk_size) { | |
fdcad551 N |
1663 | /* Nothing to change, can change level immediately. */ |
1664 | re->level = info->new_level; | |
b4f8e38b | 1665 | re->backup_blocks = 0; |
5da9ab98 N |
1666 | return NULL; |
1667 | } | |
1668 | if (re->after.data_disks == 1 && re->before.data_disks == 1) { | |
446d2a5a | 1669 | /* chunk and layout changes make no difference */ |
fdcad551 | 1670 | re->level = info->new_level; |
b4f8e38b | 1671 | re->backup_blocks = 0; |
5da9ab98 N |
1672 | return NULL; |
1673 | } | |
1674 | ||
1675 | if (re->after.data_disks == re->before.data_disks && | |
1676 | get_linux_version() < 2006032) | |
1677 | return "in-place reshape is not safe before 2.6.32 - sorry."; | |
1678 | ||
1679 | if (re->after.data_disks < re->before.data_disks && | |
1680 | get_linux_version() < 2006030) | |
508ede86 | 1681 | return "reshape to fewer devices is not supported before 2.6.30 - sorry."; |
5da9ab98 | 1682 | |
b4f8e38b | 1683 | re->backup_blocks = compute_backup_blocks( |
5da9ab98 N |
1684 | info->new_chunk, info->array.chunk_size, |
1685 | re->after.data_disks, | |
1686 | re->before.data_disks); | |
63c12c89 | 1687 | re->min_offset_change = re->backup_blocks / re->before.data_disks; |
5da9ab98 N |
1688 | |
1689 | re->new_size = info->component_size * re->after.data_disks; | |
1690 | return NULL; | |
1691 | } | |
1692 | ||
54397ed9 AK |
1693 | static int set_array_size(struct supertype *st, struct mdinfo *sra, |
1694 | char *text_version) | |
1695 | { | |
1696 | struct mdinfo *info; | |
1697 | char *subarray; | |
1698 | int ret_val = -1; | |
1699 | ||
1700 | if ((st == NULL) || (sra == NULL)) | |
1701 | return ret_val; | |
1702 | ||
1703 | if (text_version == NULL) | |
1704 | text_version = sra->text_version; | |
6ebf34e6 | 1705 | subarray = strchr(text_version + 1, '/')+1; |
54397ed9 AK |
1706 | info = st->ss->container_content(st, subarray); |
1707 | if (info) { | |
1708 | unsigned long long current_size = 0; | |
1709 | unsigned long long new_size = | |
1710 | info->custom_array_size/2; | |
1711 | ||
1712 | if (sysfs_get_ll(sra, NULL, "array_size", ¤t_size) == 0 && | |
1713 | new_size > current_size) { | |
1714 | if (sysfs_set_num(sra, NULL, "array_size", new_size) | |
1715 | < 0) | |
1716 | dprintf("Error: Cannot set array size"); | |
1717 | else { | |
1718 | ret_val = 0; | |
1719 | dprintf("Array size changed"); | |
1720 | } | |
1ade5cc1 N |
1721 | dprintf_cont(" from %llu to %llu.\n", |
1722 | current_size, new_size); | |
54397ed9 AK |
1723 | } |
1724 | sysfs_free(info); | |
1725 | } else | |
1726 | dprintf("Error: set_array_size(): info pointer in NULL\n"); | |
1727 | ||
1728 | return ret_val; | |
1729 | } | |
1730 | ||
5da9ab98 N |
1731 | static int reshape_array(char *container, int fd, char *devname, |
1732 | struct supertype *st, struct mdinfo *info, | |
e2e53a2d | 1733 | int force, struct mddev_dev *devlist, |
19ceb16d | 1734 | unsigned long long data_offset, |
ba728be7 | 1735 | char *backup_file, int verbose, int forked, |
b76b30e0 | 1736 | int restart, int freeze_reshape); |
493f5dd6 | 1737 | static int reshape_container(char *container, char *devname, |
9ad6f6e6 | 1738 | int mdfd, |
24daa16f | 1739 | struct supertype *st, |
5da9ab98 N |
1740 | struct mdinfo *info, |
1741 | int force, | |
b0140ae8 N |
1742 | char *backup_file, int verbose, |
1743 | int forked, int restart, int freeze_reshape); | |
1c009fc2 | 1744 | |
32754b7d | 1745 | int Grow_reshape(char *devname, int fd, |
e2e53a2d | 1746 | struct mddev_dev *devlist, |
40c9a66a | 1747 | unsigned long long data_offset, |
32754b7d | 1748 | struct context *c, struct shape *s) |
e86c9dd6 NB |
1749 | { |
1750 | /* Make some changes in the shape of an array. | |
1751 | * The kernel must support the change. | |
7236ee7a N |
1752 | * |
1753 | * There are three different changes. Each can trigger | |
1754 | * a resync or recovery so we freeze that until we have | |
1755 | * requested everything (if kernel supports freezing - 2.6.30). | |
1756 | * The steps are: | |
1757 | * - change size (i.e. component_size) | |
1758 | * - change level | |
1759 | * - change layout/chunksize/ndisks | |
1760 | * | |
1761 | * The last can require a reshape. It is different on different | |
1762 | * levels so we need to check the level before actioning it. | |
1763 | * Some times the level change needs to be requested after the | |
1764 | * reshape (e.g. raid6->raid5, raid5->raid0) | |
1765 | * | |
e86c9dd6 | 1766 | */ |
5da9ab98 | 1767 | struct mdu_array_info_s array; |
7236ee7a | 1768 | int rv = 0; |
e86c9dd6 | 1769 | struct supertype *st; |
4725bc31 | 1770 | char *subarray = NULL; |
e86c9dd6 | 1771 | |
7236ee7a | 1772 | int frozen; |
7236ee7a | 1773 | int changed = 0; |
7bc71196 DW |
1774 | char *container = NULL; |
1775 | int cfd = -1; | |
e86c9dd6 | 1776 | |
e2e53a2d N |
1777 | struct mddev_dev *dv; |
1778 | int added_disks; | |
1779 | ||
5da9ab98 | 1780 | struct mdinfo info; |
7e0f6979 | 1781 | struct mdinfo *sra; |
e86c9dd6 | 1782 | |
9cd39f01 | 1783 | if (md_get_array_info(fd, &array) < 0) { |
ed503f89 | 1784 | pr_err("%s is not an active md array - aborting\n", |
e86c9dd6 NB |
1785 | devname); |
1786 | return 1; | |
1787 | } | |
6ebf34e6 JS |
1788 | if (data_offset != INVALID_SECTORS && array.level != 10 && |
1789 | (array.level < 4 || array.level > 6)) { | |
19ceb16d N |
1790 | pr_err("--grow --data-offset not yet supported\n"); |
1791 | return 1; | |
1792 | } | |
24d40069 | 1793 | |
32754b7d N |
1794 | if (s->size > 0 && |
1795 | (s->chunk || s->level!= UnSet || s->layout_str || s->raiddisks)) { | |
7a862a02 N |
1796 | pr_err("cannot change component size at the same time as other changes.\n" |
1797 | " Change size first, then check data is intact before making other changes.\n"); | |
9ce510be N |
1798 | return 1; |
1799 | } | |
1800 | ||
6ebf34e6 JS |
1801 | if (s->raiddisks && s->raiddisks < array.raid_disks && |
1802 | array.level > 1 && get_linux_version() < 2006032 && | |
24d40069 | 1803 | !check_env("MDADM_FORCE_FEWER")) { |
e7b84f9d | 1804 | pr_err("reducing the number of devices is not safe before Linux 2.6.32\n" |
24d40069 N |
1805 | " Please use a newer kernel\n"); |
1806 | return 1; | |
1807 | } | |
7bc71196 DW |
1808 | |
1809 | st = super_by_fd(fd, &subarray); | |
1810 | if (!st) { | |
e7b84f9d | 1811 | pr_err("Unable to determine metadata format for %s\n", devname); |
7bc71196 DW |
1812 | return 1; |
1813 | } | |
32754b7d | 1814 | if (s->raiddisks > st->max_devs) { |
7a862a02 | 1815 | pr_err("Cannot increase raid-disks on this array beyond %d\n", st->max_devs); |
acab7bb1 N |
1816 | return 1; |
1817 | } | |
f7cf9699 XN |
1818 | if (s->level == 0 && |
1819 | (array.state & (1<<MD_SB_BITMAP_PRESENT)) && | |
1820 | !(array.state & (1<<MD_SB_CLUSTERED))) { | |
1821 | array.state &= ~(1<<MD_SB_BITMAP_PRESENT); | |
018a4882 | 1822 | if (md_set_array_info(fd, &array)!= 0) { |
f7cf9699 XN |
1823 | pr_err("failed to remove internal bitmap.\n"); |
1824 | return 1; | |
1825 | } | |
1826 | } | |
7bc71196 DW |
1827 | |
1828 | /* in the external case we need to check that the requested reshape is | |
1829 | * supported, and perform an initial check that the container holds the | |
1830 | * pre-requisite spare devices (mdmon owns final validation) | |
1831 | */ | |
1832 | if (st->ss->external) { | |
49948a35 | 1833 | int retval; |
7bc71196 DW |
1834 | |
1835 | if (subarray) { | |
4dd2df09 N |
1836 | container = st->container_devnm; |
1837 | cfd = open_dev_excl(st->container_devnm); | |
7bc71196 | 1838 | } else { |
4dd2df09 | 1839 | container = st->devnm; |
7bc71196 | 1840 | close(fd); |
4dd2df09 | 1841 | cfd = open_dev_excl(st->devnm); |
7bc71196 DW |
1842 | fd = cfd; |
1843 | } | |
1844 | if (cfd < 0) { | |
e7b84f9d | 1845 | pr_err("Unable to open container for %s\n", |
7bc71196 | 1846 | devname); |
7f2ba464 | 1847 | free(subarray); |
7bc71196 DW |
1848 | return 1; |
1849 | } | |
1850 | ||
49948a35 | 1851 | retval = st->ss->load_container(st, cfd, NULL); |
eb744788 | 1852 | |
49948a35 | 1853 | if (retval) { |
e7b84f9d | 1854 | pr_err("Cannot read superblock for %s\n", |
7bc71196 | 1855 | devname); |
7f2ba464 | 1856 | free(subarray); |
7bc71196 DW |
1857 | return 1; |
1858 | } | |
1859 | ||
81219e70 LM |
1860 | /* check if operation is supported for metadata handler */ |
1861 | if (st->ss->container_content) { | |
1862 | struct mdinfo *cc = NULL; | |
1863 | struct mdinfo *content = NULL; | |
1864 | ||
1865 | cc = st->ss->container_content(st, subarray); | |
1866 | for (content = cc; content ; content = content->next) { | |
446894ea | 1867 | int allow_reshape = 1; |
81219e70 LM |
1868 | |
1869 | /* check if reshape is allowed based on metadata | |
1870 | * indications stored in content.array.status | |
1871 | */ | |
6ebf34e6 JS |
1872 | if (content->array.state & |
1873 | (1 << MD_SB_BLOCK_VOLUME)) | |
446894ea | 1874 | allow_reshape = 0; |
6ebf34e6 JS |
1875 | if (content->array.state & |
1876 | (1 << MD_SB_BLOCK_CONTAINER_RESHAPE)) | |
446894ea | 1877 | allow_reshape = 0; |
81219e70 | 1878 | if (!allow_reshape) { |
7a862a02 | 1879 | pr_err("cannot reshape arrays in container with unsupported metadata: %s(%s)\n", |
4dd2df09 | 1880 | devname, container); |
81219e70 LM |
1881 | sysfs_free(cc); |
1882 | free(subarray); | |
1883 | return 1; | |
1884 | } | |
1885 | } | |
1886 | sysfs_free(cc); | |
1887 | } | |
4dd2df09 | 1888 | if (mdmon_running(container)) |
7bc71196 | 1889 | st->update_tail = &st->updates; |
e2e53a2d | 1890 | } |
691a36b7 | 1891 | |
e2e53a2d N |
1892 | added_disks = 0; |
1893 | for (dv = devlist; dv; dv = dv->next) | |
1894 | added_disks++; | |
32754b7d | 1895 | if (s->raiddisks > array.raid_disks && |
6ebf34e6 | 1896 | array.spare_disks + added_disks < (s->raiddisks - array.raid_disks) && |
32754b7d | 1897 | !c->force) { |
7a862a02 | 1898 | pr_err("Need %d spare%s to avoid degraded array, and only have %d.\n" |
e7b84f9d | 1899 | " Use --force to over-ride this check.\n", |
32754b7d N |
1900 | s->raiddisks - array.raid_disks, |
1901 | s->raiddisks - array.raid_disks == 1 ? "" : "s", | |
e7b84f9d | 1902 | array.spare_disks + added_disks); |
691a36b7 | 1903 | return 1; |
7bc71196 DW |
1904 | } |
1905 | ||
6ebf34e6 JS |
1906 | sra = sysfs_read(fd, NULL, GET_LEVEL | GET_DISKS | GET_DEVS | |
1907 | GET_STATE | GET_VERSION); | |
24daa16f | 1908 | if (sra) { |
7f2ba464 | 1909 | if (st->ss->external && subarray == NULL) { |
7bc71196 DW |
1910 | array.level = LEVEL_CONTAINER; |
1911 | sra->array.level = LEVEL_CONTAINER; | |
1912 | } | |
7bc71196 | 1913 | } else { |
e7b84f9d | 1914 | pr_err("failed to read sysfs parameters for %s\n", |
b526e52d DW |
1915 | devname); |
1916 | return 1; | |
1917 | } | |
7f2ba464 DW |
1918 | frozen = freeze(st); |
1919 | if (frozen < -1) { | |
1920 | /* freeze() already spewed the reason */ | |
8e61e0d7 | 1921 | sysfs_free(sra); |
7f2ba464 DW |
1922 | return 1; |
1923 | } else if (frozen < 0) { | |
7a862a02 | 1924 | pr_err("%s is performing resync/recovery and cannot be reshaped\n", devname); |
8e61e0d7 | 1925 | sysfs_free(sra); |
7236ee7a N |
1926 | return 1; |
1927 | } | |
1928 | ||
1929 | /* ========= set size =============== */ | |
6ebf34e6 JS |
1930 | if (s->size > 0 && |
1931 | (s->size == MAX_SIZE || s->size != (unsigned)array.size)) { | |
d04f65f4 N |
1932 | unsigned long long orig_size = get_component_size(fd)/2; |
1933 | unsigned long long min_csize; | |
d1537ed1 | 1934 | struct mdinfo *mdi; |
44f6f181 | 1935 | int raid0_takeover = 0; |
7bc71196 | 1936 | |
85f10287 | 1937 | if (orig_size == 0) |
d04f65f4 | 1938 | orig_size = (unsigned) array.size; |
85f10287 | 1939 | |
3920235e N |
1940 | if (orig_size == 0) { |
1941 | pr_err("Cannot set device size in this type of array.\n"); | |
1942 | rv = 1; | |
1943 | goto release; | |
1944 | } | |
1945 | ||
32754b7d | 1946 | if (reshape_super(st, s->size, UnSet, UnSet, 0, 0, UnSet, NULL, |
6ebf34e6 JS |
1947 | devname, APPLY_METADATA_CHANGES, |
1948 | c->verbose > 0)) { | |
7bc71196 DW |
1949 | rv = 1; |
1950 | goto release; | |
1951 | } | |
1952 | sync_metadata(st); | |
7e7e9a4d AK |
1953 | if (st->ss->external) { |
1954 | /* metadata can have size limitation | |
1955 | * update size value according to metadata information | |
1956 | */ | |
1957 | struct mdinfo *sizeinfo = | |
1958 | st->ss->container_content(st, subarray); | |
1959 | if (sizeinfo) { | |
1960 | unsigned long long new_size = | |
1961 | sizeinfo->custom_array_size/2; | |
1962 | int data_disks = get_data_disks( | |
1963 | sizeinfo->array.level, | |
1964 | sizeinfo->array.layout, | |
1965 | sizeinfo->array.raid_disks); | |
1966 | new_size /= data_disks; | |
6ebf34e6 JS |
1967 | dprintf("Metadata size correction from %llu to %llu (%llu)\n", |
1968 | orig_size, new_size, | |
7e7e9a4d | 1969 | new_size * data_disks); |
32754b7d | 1970 | s->size = new_size; |
7e7e9a4d AK |
1971 | sysfs_free(sizeinfo); |
1972 | } | |
1973 | } | |
d1537ed1 N |
1974 | |
1975 | /* Update the size of each member device in case | |
1976 | * they have been resized. This will never reduce | |
1977 | * below the current used-size. The "size" attribute | |
20a46756 | 1978 | * understands '0' to mean 'max'. |
d1537ed1 | 1979 | */ |
20a46756 N |
1980 | min_csize = 0; |
1981 | for (mdi = sra->devs; mdi; mdi = mdi->next) { | |
20a46756 N |
1982 | if (array.not_persistent == 0 && |
1983 | array.major_version == 0 && | |
1984 | get_linux_version() < 3001000) { | |
1985 | /* Dangerous to allow size to exceed 2TB */ | |
1986 | unsigned long long csize; | |
1987 | if (sysfs_get_ll(sra, mdi, "size", &csize) == 0) { | |
1988 | if (csize >= 2ULL*1024*1024*1024) | |
1989 | csize = 2ULL*1024*1024*1024; | |
1990 | if ((min_csize == 0 || (min_csize | |
d04f65f4 | 1991 | > csize))) |
20a46756 N |
1992 | min_csize = csize; |
1993 | } | |
1994 | } | |
1995 | } | |
32754b7d | 1996 | if (min_csize && s->size > min_csize) { |
7a862a02 | 1997 | pr_err("Cannot safely make this array use more than 2TB per device on this kernel.\n"); |
20a46756 | 1998 | rv = 1; |
65a9798b | 1999 | goto size_change_error; |
20a46756 | 2000 | } |
32754b7d | 2001 | if (min_csize && s->size == MAX_SIZE) { |
20a46756 N |
2002 | /* Don't let the kernel choose a size - it will get |
2003 | * it wrong | |
2004 | */ | |
7a862a02 | 2005 | pr_err("Limited v0.90 array to 2TB per device\n"); |
32754b7d | 2006 | s->size = min_csize; |
20a46756 | 2007 | } |
44f6f181 AK |
2008 | if (st->ss->external) { |
2009 | if (sra->array.level == 0) { | |
2010 | rv = sysfs_set_str(sra, NULL, "level", | |
2011 | "raid5"); | |
2012 | if (!rv) { | |
2013 | raid0_takeover = 1; | |
2a6493cf N |
2014 | /* get array parameters after takeover |
2015 | * to change one parameter at time only | |
44f6f181 | 2016 | */ |
9cd39f01 | 2017 | rv = md_get_array_info(fd, &array); |
44f6f181 AK |
2018 | } |
2019 | } | |
2020 | /* make sure mdmon is | |
2021 | * aware of the new level */ | |
4dd2df09 N |
2022 | if (!mdmon_running(st->container_devnm)) |
2023 | start_mdmon(st->container_devnm); | |
44f6f181 | 2024 | ping_monitor(container); |
4dd2df09 | 2025 | if (mdmon_running(st->container_devnm) && |
44f6f181 AK |
2026 | st->update_tail == NULL) |
2027 | st->update_tail = &st->updates; | |
2028 | } | |
2029 | ||
0a8b92a6 N |
2030 | if (s->size == MAX_SIZE) |
2031 | s->size = 0; | |
2032 | array.size = s->size; | |
0448027b | 2033 | if (s->size & ~INT32_MAX) { |
7236ee7a N |
2034 | /* got truncated to 32bit, write to |
2035 | * component_size instead | |
2036 | */ | |
2037 | if (sra) | |
2038 | rv = sysfs_set_num(sra, NULL, | |
32754b7d | 2039 | "component_size", s->size); |
7236ee7a N |
2040 | else |
2041 | rv = -1; | |
54397ed9 | 2042 | } else { |
018a4882 | 2043 | rv = md_set_array_info(fd, &array); |
44f6f181 | 2044 | |
54397ed9 AK |
2045 | /* manage array size when it is managed externally |
2046 | */ | |
2047 | if ((rv == 0) && st->ss->external) | |
2048 | rv = set_array_size(st, sra, sra->text_version); | |
2049 | } | |
2050 | ||
44f6f181 AK |
2051 | if (raid0_takeover) { |
2052 | /* do not recync non-existing parity, | |
2053 | * we will drop it anyway | |
2054 | */ | |
b51702b8 | 2055 | sysfs_set_str(sra, NULL, "sync_action", "frozen"); |
44f6f181 AK |
2056 | /* go back to raid0, drop parity disk |
2057 | */ | |
2058 | sysfs_set_str(sra, NULL, "level", "raid0"); | |
9cd39f01 | 2059 | md_get_array_info(fd, &array); |
44f6f181 AK |
2060 | } |
2061 | ||
65a9798b | 2062 | size_change_error: |
7236ee7a | 2063 | if (rv != 0) { |
39bbb392 | 2064 | int err = errno; |
7bc71196 DW |
2065 | |
2066 | /* restore metadata */ | |
2067 | if (reshape_super(st, orig_size, UnSet, UnSet, 0, 0, | |
016e00f5 AK |
2068 | UnSet, NULL, devname, |
2069 | ROLLBACK_METADATA_CHANGES, | |
32754b7d | 2070 | c->verbose) == 0) |
7bc71196 | 2071 | sync_metadata(st); |
e7b84f9d | 2072 | pr_err("Cannot set device size for %s: %s\n", |
39bbb392 | 2073 | devname, strerror(err)); |
24daa16f | 2074 | if (err == EBUSY && |
39bbb392 | 2075 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) |
e7b84f9d | 2076 | cont_err("Bitmap must be removed before size can be changed\n"); |
7236ee7a N |
2077 | rv = 1; |
2078 | goto release; | |
2079 | } | |
32754b7d | 2080 | if (s->assume_clean) { |
86952387 | 2081 | /* This will fail on kernels older than 3.0 unless |
ce52f92f N |
2082 | * a backport has been arranged. |
2083 | */ | |
2084 | if (sra == NULL || | |
2085 | sysfs_set_str(sra, NULL, "resync_start", "none") < 0) | |
86952387 | 2086 | pr_err("--assume-clean not supported with --grow on this kernel\n"); |
ce52f92f | 2087 | } |
9cd39f01 | 2088 | md_get_array_info(fd, &array); |
32754b7d N |
2089 | s->size = get_component_size(fd)/2; |
2090 | if (s->size == 0) | |
2091 | s->size = array.size; | |
2092 | if (c->verbose >= 0) { | |
2093 | if (s->size == orig_size) | |
7a862a02 | 2094 | pr_err("component size of %s unchanged at %lluK\n", |
32754b7d | 2095 | devname, s->size); |
85f10287 | 2096 | else |
7a862a02 | 2097 | pr_err("component size of %s has been set to %lluK\n", |
32754b7d | 2098 | devname, s->size); |
85f10287 | 2099 | } |
7236ee7a | 2100 | changed = 1; |
7bc71196 | 2101 | } else if (array.level != LEVEL_CONTAINER) { |
32754b7d N |
2102 | s->size = get_component_size(fd)/2; |
2103 | if (s->size == 0) | |
2104 | s->size = array.size; | |
7236ee7a N |
2105 | } |
2106 | ||
d515d27f | 2107 | /* See if there is anything else to do */ |
32754b7d N |
2108 | if ((s->level == UnSet || s->level == array.level) && |
2109 | (s->layout_str == NULL) && | |
2110 | (s->chunk == 0 || s->chunk == array.chunk_size) && | |
8876bf0b | 2111 | data_offset == INVALID_SECTORS && |
32754b7d | 2112 | (s->raiddisks == 0 || s->raiddisks == array.raid_disks)) { |
d515d27f | 2113 | /* Nothing more to do */ |
32754b7d | 2114 | if (!changed && c->verbose >= 0) |
e7b84f9d | 2115 | pr_err("%s: no change requested\n", |
d515d27f N |
2116 | devname); |
2117 | goto release; | |
2118 | } | |
2119 | ||
dfe77a9e | 2120 | /* ========= check for Raid10/Raid1 -> Raid0 conversion =============== |
5da9ab98 | 2121 | * current implementation assumes that following conditions must be met: |
dfe77a9e | 2122 | * - RAID10: |
24daa16f N |
2123 | * - far_copies == 1 |
2124 | * - near_copies == 2 | |
62a48395 | 2125 | */ |
32754b7d | 2126 | if ((s->level == 0 && array.level == 10 && sra && |
24daa16f | 2127 | array.layout == ((1 << 8) + 2) && !(array.raid_disks & 1)) || |
32754b7d | 2128 | (s->level == 0 && array.level == 1 && sra)) { |
62a48395 | 2129 | int err; |
dfe77a9e | 2130 | err = remove_disks_for_takeover(st, sra, array.layout); |
62a48395 | 2131 | if (err) { |
1ade5cc1 | 2132 | dprintf("Array cannot be reshaped\n"); |
62a48395 AK |
2133 | if (cfd > -1) |
2134 | close(cfd); | |
5da9ab98 N |
2135 | rv = 1; |
2136 | goto release; | |
7236ee7a | 2137 | } |
fde139b9 N |
2138 | /* Make sure mdmon has seen the device removal |
2139 | * and updated metadata before we continue with | |
2140 | * level change | |
2141 | */ | |
2142 | if (container) | |
2143 | ping_monitor(container); | |
7236ee7a N |
2144 | } |
2145 | ||
8ff6d094 | 2146 | memset(&info, 0, sizeof(info)); |
5da9ab98 | 2147 | info.array = array; |
dae13137 JS |
2148 | if (sysfs_init(&info, fd, NULL)) { |
2149 | pr_err("failed to intialize sysfs.\n"); | |
2150 | rv = 1; | |
2151 | goto release; | |
2152 | } | |
3fa436ac | 2153 | strcpy(info.text_version, sra->text_version); |
32754b7d N |
2154 | info.component_size = s->size*2; |
2155 | info.new_level = s->level; | |
2156 | info.new_chunk = s->chunk * 1024; | |
eff4954d N |
2157 | if (info.array.level == LEVEL_CONTAINER) { |
2158 | info.delta_disks = UnSet; | |
32754b7d N |
2159 | info.array.raid_disks = s->raiddisks; |
2160 | } else if (s->raiddisks) | |
2161 | info.delta_disks = s->raiddisks - info.array.raid_disks; | |
5da9ab98 N |
2162 | else |
2163 | info.delta_disks = UnSet; | |
32754b7d | 2164 | if (s->layout_str == NULL) { |
5da9ab98 N |
2165 | info.new_layout = UnSet; |
2166 | if (info.array.level == 6 && | |
2167 | (info.new_level == 6 || info.new_level == UnSet) && | |
2168 | info.array.layout >= 16) { | |
7a862a02 N |
2169 | pr_err("%s has a non-standard layout. If you wish to preserve this\n", devname); |
2170 | cont_err("during the reshape, please specify --layout=preserve\n"); | |
2171 | cont_err("If you want to change it, specify a layout or use --layout=normalise\n"); | |
7236ee7a N |
2172 | rv = 1; |
2173 | goto release; | |
2174 | } | |
32754b7d N |
2175 | } else if (strcmp(s->layout_str, "normalise") == 0 || |
2176 | strcmp(s->layout_str, "normalize") == 0) { | |
5da9ab98 N |
2177 | /* If we have a -6 RAID6 layout, remove the '-6'. */ |
2178 | info.new_layout = UnSet; | |
2179 | if (info.array.level == 6 && info.new_level == UnSet) { | |
2180 | char l[40], *h; | |
2181 | strcpy(l, map_num(r6layout, info.array.layout)); | |
2182 | h = strrchr(l, '-'); | |
2183 | if (h && strcmp(h, "-6") == 0) { | |
2184 | *h = 0; | |
2185 | info.new_layout = map_name(r6layout, l); | |
7236ee7a | 2186 | } |
385167f3 | 2187 | } else { |
7a862a02 | 2188 | pr_err("%s is only meaningful when reshaping a RAID6 array.\n", s->layout_str); |
385167f3 N |
2189 | rv = 1; |
2190 | goto release; | |
7236ee7a | 2191 | } |
32754b7d | 2192 | } else if (strcmp(s->layout_str, "preserve") == 0) { |
385167f3 N |
2193 | /* This means that a non-standard RAID6 layout |
2194 | * is OK. | |
2195 | * In particular: | |
2196 | * - When reshape a RAID6 (e.g. adding a device) | |
2197 | * which is in a non-standard layout, it is OK | |
2198 | * to preserve that layout. | |
2199 | * - When converting a RAID5 to RAID6, leave it in | |
2200 | * the XXX-6 layout, don't re-layout. | |
2201 | */ | |
2202 | if (info.array.level == 6 && info.new_level == UnSet) | |
2203 | info.new_layout = info.array.layout; | |
2204 | else if (info.array.level == 5 && info.new_level == 6) { | |
2205 | char l[40]; | |
2206 | strcpy(l, map_num(r5layout, info.array.layout)); | |
2207 | strcat(l, "-6"); | |
2208 | info.new_layout = map_name(r6layout, l); | |
2209 | } else { | |
7a862a02 | 2210 | pr_err("%s in only meaningful when reshaping to RAID6\n", s->layout_str); |
385167f3 N |
2211 | rv = 1; |
2212 | goto release; | |
2213 | } | |
5da9ab98 N |
2214 | } else { |
2215 | int l = info.new_level; | |
2216 | if (l == UnSet) | |
2217 | l = info.array.level; | |
2218 | switch (l) { | |
2219 | case 5: | |
32754b7d | 2220 | info.new_layout = map_name(r5layout, s->layout_str); |
5da9ab98 N |
2221 | break; |
2222 | case 6: | |
32754b7d | 2223 | info.new_layout = map_name(r6layout, s->layout_str); |
5da9ab98 N |
2224 | break; |
2225 | case 10: | |
32754b7d | 2226 | info.new_layout = parse_layout_10(s->layout_str); |
5da9ab98 N |
2227 | break; |
2228 | case LEVEL_FAULTY: | |
32754b7d | 2229 | info.new_layout = parse_layout_faulty(s->layout_str); |
5da9ab98 N |
2230 | break; |
2231 | default: | |
7a862a02 | 2232 | pr_err("layout not meaningful with this level\n"); |
7bc71196 DW |
2233 | rv = 1; |
2234 | goto release; | |
2235 | } | |
5da9ab98 | 2236 | if (info.new_layout == UnSet) { |
7a862a02 | 2237 | pr_err("layout %s not understood for this level\n", |
32754b7d | 2238 | s->layout_str); |
5da9ab98 N |
2239 | rv = 1; |
2240 | goto release; | |
7bc71196 | 2241 | } |
7236ee7a N |
2242 | } |
2243 | ||
907ea753 | 2244 | if (array.level == LEVEL_FAULTY) { |
32754b7d | 2245 | if (s->level != UnSet && s->level != array.level) { |
e7b84f9d | 2246 | pr_err("cannot change level of Faulty device\n"); |
907ea753 N |
2247 | rv =1 ; |
2248 | } | |
32754b7d | 2249 | if (s->chunk) { |
e7b84f9d | 2250 | pr_err("cannot set chunksize of Faulty device\n"); |
907ea753 N |
2251 | rv =1 ; |
2252 | } | |
32754b7d | 2253 | if (s->raiddisks && s->raiddisks != 1) { |
e7b84f9d | 2254 | pr_err("cannot set raid_disks of Faulty device\n"); |
907ea753 N |
2255 | rv =1 ; |
2256 | } | |
32754b7d | 2257 | if (s->layout_str) { |
9cd39f01 | 2258 | if (md_get_array_info(fd, &array) != 0) { |
907ea753 N |
2259 | dprintf("Cannot get array information.\n"); |
2260 | goto release; | |
2261 | } | |
2262 | array.layout = info.new_layout; | |
018a4882 | 2263 | if (md_set_array_info(fd, &array) != 0) { |
e7b84f9d | 2264 | pr_err("failed to set new layout\n"); |
907ea753 | 2265 | rv = 1; |
32754b7d | 2266 | } else if (c->verbose >= 0) |
907ea753 N |
2267 | printf("layout for %s set to %d\n", |
2268 | devname, array.layout); | |
2269 | } | |
2270 | } else if (array.level == LEVEL_CONTAINER) { | |
5da9ab98 N |
2271 | /* This change is to be applied to every array in the |
2272 | * container. This is only needed when the metadata imposes | |
2273 | * restraints of the various arrays in the container. | |
2274 | * Currently we only know that IMSM requires all arrays | |
2275 | * to have the same number of devices so changing the | |
2276 | * number of devices (On-Line Capacity Expansion) must be | |
2277 | * performed at the level of the container | |
2278 | */ | |
ad2f4646 PB |
2279 | if (fd > 0) { |
2280 | close(fd); | |
2281 | fd = -1; | |
2282 | } | |
9ad6f6e6 | 2283 | rv = reshape_container(container, devname, -1, st, &info, |
b0140ae8 | 2284 | c->force, c->backup_file, c->verbose, 0, 0, 0); |
9202b8eb | 2285 | frozen = 0; |
5da9ab98 | 2286 | } else { |
08f9e34b AK |
2287 | /* get spare devices from external metadata |
2288 | */ | |
2289 | if (st->ss->external) { | |
2290 | struct mdinfo *info2; | |
2291 | ||
2292 | info2 = st->ss->container_content(st, subarray); | |
2293 | if (info2) { | |
2294 | info.array.spare_disks = | |
2295 | info2->array.spare_disks; | |
2296 | sysfs_free(info2); | |
2297 | } | |
2298 | } | |
2299 | ||
5da9ab98 N |
2300 | /* Impose these changes on a single array. First |
2301 | * check that the metadata is OK with the change. */ | |
7bc71196 | 2302 | |
7ec0996c | 2303 | if (reshape_super(st, 0, info.new_level, |
5da9ab98 | 2304 | info.new_layout, info.new_chunk, |
41784c88 | 2305 | info.array.raid_disks, info.delta_disks, |
32754b7d N |
2306 | c->backup_file, devname, APPLY_METADATA_CHANGES, |
2307 | c->verbose)) { | |
7bc71196 DW |
2308 | rv = 1; |
2309 | goto release; | |
2310 | } | |
5da9ab98 | 2311 | sync_metadata(st); |
32754b7d | 2312 | rv = reshape_array(container, fd, devname, st, &info, c->force, |
19ceb16d N |
2313 | devlist, data_offset, c->backup_file, c->verbose, |
2314 | 0, 0, 0); | |
9202b8eb | 2315 | frozen = 0; |
5da9ab98 N |
2316 | } |
2317 | release: | |
8e61e0d7 | 2318 | sysfs_free(sra); |
9202b8eb N |
2319 | if (frozen > 0) |
2320 | unfreeze(st); | |
5da9ab98 N |
2321 | return rv; |
2322 | } | |
7bc71196 | 2323 | |
f93346ef AK |
2324 | /* verify_reshape_position() |
2325 | * Function checks if reshape position in metadata is not farther | |
2326 | * than position in md. | |
2327 | * Return value: | |
2328 | * 0 : not valid sysfs entry | |
2329 | * it can be caused by not started reshape, it should be started | |
2330 | * by reshape array or raid0 array is before takeover | |
2331 | * -1 : error, reshape position is obviously wrong | |
2332 | * 1 : success, reshape progress correct or updated | |
2333 | */ | |
2334 | static int verify_reshape_position(struct mdinfo *info, int level) | |
2335 | { | |
2336 | int ret_val = 0; | |
2337 | char buf[40]; | |
178950ea | 2338 | int rv; |
f93346ef AK |
2339 | |
2340 | /* read sync_max, failure can mean raid0 array */ | |
178950ea AK |
2341 | rv = sysfs_get_str(info, NULL, "sync_max", buf, 40); |
2342 | ||
2343 | if (rv > 0) { | |
f93346ef AK |
2344 | char *ep; |
2345 | unsigned long long position = strtoull(buf, &ep, 0); | |
2346 | ||
1ade5cc1 | 2347 | dprintf("Read sync_max sysfs entry is: %s\n", buf); |
f93346ef AK |
2348 | if (!(ep == buf || (*ep != 0 && *ep != '\n' && *ep != ' '))) { |
2349 | position *= get_data_disks(level, | |
2350 | info->new_layout, | |
2351 | info->array.raid_disks); | |
2352 | if (info->reshape_progress < position) { | |
7a862a02 | 2353 | dprintf("Corrected reshape progress (%llu) to md position (%llu)\n", |
f93346ef AK |
2354 | info->reshape_progress, position); |
2355 | info->reshape_progress = position; | |
2356 | ret_val = 1; | |
2357 | } else if (info->reshape_progress > position) { | |
7a862a02 | 2358 | pr_err("Fatal error: array reshape was not properly frozen (expected reshape position is %llu, but reshape progress is %llu.\n", |
e7b84f9d | 2359 | position, info->reshape_progress); |
f93346ef AK |
2360 | ret_val = -1; |
2361 | } else { | |
7a862a02 | 2362 | dprintf("Reshape position in md and metadata are the same;"); |
f93346ef AK |
2363 | ret_val = 1; |
2364 | } | |
2365 | } | |
178950ea AK |
2366 | } else if (rv == 0) { |
2367 | /* for valid sysfs entry, 0-length content | |
2368 | * should be indicated as error | |
2369 | */ | |
2370 | ret_val = -1; | |
f93346ef AK |
2371 | } |
2372 | ||
2373 | return ret_val; | |
2374 | } | |
2375 | ||
534f5432 N |
2376 | static unsigned long long choose_offset(unsigned long long lo, |
2377 | unsigned long long hi, | |
2378 | unsigned long long min, | |
2379 | unsigned long long max) | |
2380 | { | |
2381 | /* Choose a new offset between hi and lo. | |
2382 | * It must be between min and max, but | |
2383 | * we would prefer something near the middle of hi/lo, and also | |
2384 | * prefer to be aligned to a big power of 2. | |
2385 | * | |
2386 | * So we start with the middle, then for each bit, | |
2387 | * starting at '1' and increasing, if it is set, we either | |
2388 | * add it or subtract it if possible, preferring the option | |
2389 | * which is furthest from the boundary. | |
2390 | * | |
2391 | * We stop once we get a 1MB alignment. As units are in sectors, | |
2392 | * 1MB = 2*1024 sectors. | |
2393 | */ | |
2394 | unsigned long long choice = (lo + hi) / 2; | |
2395 | unsigned long long bit = 1; | |
2396 | ||
2397 | for (bit = 1; bit < 2*1024; bit = bit << 1) { | |
2398 | unsigned long long bigger, smaller; | |
2399 | if (! (bit & choice)) | |
2400 | continue; | |
2401 | bigger = choice + bit; | |
2402 | smaller = choice - bit; | |
2403 | if (bigger > max && smaller < min) | |
2404 | break; | |
2405 | if (bigger > max) | |
2406 | choice = smaller; | |
2407 | else if (smaller < min) | |
2408 | choice = bigger; | |
2409 | else if (hi - bigger > smaller - lo) | |
2410 | choice = bigger; | |
2411 | else | |
2412 | choice = smaller; | |
2413 | } | |
2414 | return choice; | |
2415 | } | |
2416 | ||
13bbb145 | 2417 | static int set_new_data_offset(struct mdinfo *sra, struct supertype *st, |
50a4962f | 2418 | char *devname, int delta_disks, |
13bbb145 | 2419 | unsigned long long data_offset, |
6a23fb9d N |
2420 | unsigned long long min, |
2421 | int can_fallback) | |
19ceb16d | 2422 | { |
13bbb145 | 2423 | struct mdinfo *sd; |
19ceb16d N |
2424 | int dir = 0; |
2425 | int err = 0; | |
f9b08fec | 2426 | unsigned long long before, after; |
19ceb16d | 2427 | |
f9b08fec N |
2428 | /* Need to find min space before and after so same is used |
2429 | * on all devices | |
2430 | */ | |
2431 | before = UINT64_MAX; | |
2432 | after = UINT64_MAX; | |
19ceb16d N |
2433 | for (sd = sra->devs; sd; sd = sd->next) { |
2434 | char *dn; | |
2435 | int dfd; | |
2436 | int rv; | |
2437 | struct supertype *st2; | |
2438 | struct mdinfo info2; | |
2439 | ||
2440 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
2441 | continue; | |
2442 | dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
2443 | dfd = dev_open(dn, O_RDONLY); | |
2444 | if (dfd < 0) { | |
ed503f89 | 2445 | pr_err("%s: cannot open component %s\n", |
19ceb16d | 2446 | devname, dn ? dn : "-unknown-"); |
19ceb16d N |
2447 | goto release; |
2448 | } | |
2449 | st2 = dup_super(st); | |
2450 | rv = st2->ss->load_super(st2,dfd, NULL); | |
2451 | close(dfd); | |
2452 | if (rv) { | |
2453 | free(st2); | |
ed503f89 | 2454 | pr_err("%s: cannot get superblock from %s\n", |
19ceb16d N |
2455 | devname, dn); |
2456 | goto release; | |
2457 | } | |
2458 | st2->ss->getinfo_super(st2, &info2, NULL); | |
2459 | st2->ss->free_super(st2); | |
2460 | free(st2); | |
c4b26c64 N |
2461 | if (info2.space_before == 0 && |
2462 | info2.space_after == 0) { | |
2463 | /* Metadata doesn't support data_offset changes */ | |
dd243f56 N |
2464 | if (!can_fallback) |
2465 | pr_err("%s: Metadata version doesn't support data_offset changes\n", | |
2466 | devname); | |
16afb1a5 | 2467 | goto fallback; |
c4b26c64 | 2468 | } |
f9b08fec N |
2469 | if (before > info2.space_before) |
2470 | before = info2.space_before; | |
2471 | if (after > info2.space_after) | |
2472 | after = info2.space_after; | |
2473 | ||
2474 | if (data_offset != INVALID_SECTORS) { | |
2475 | if (dir == 0) { | |
2476 | if (info2.data_offset == data_offset) { | |
2477 | pr_err("%s: already has that data_offset\n", | |
2478 | dn); | |
2479 | goto release; | |
2480 | } | |
2481 | if (data_offset < info2.data_offset) | |
2482 | dir = -1; | |
2483 | else | |
2484 | dir = 1; | |
2485 | } else if ((data_offset <= info2.data_offset && dir == 1) || | |
2486 | (data_offset >= info2.data_offset && dir == -1)) { | |
2487 | pr_err("%s: differing data offsets on devices make this --data-offset setting impossible\n", | |
2488 | dn); | |
2489 | goto release; | |
2490 | } | |
2491 | } | |
2492 | } | |
2493 | if (before == UINT64_MAX) | |
2494 | /* impossible really, there must be no devices */ | |
2495 | return 1; | |
2496 | ||
2497 | for (sd = sra->devs; sd; sd = sd->next) { | |
2498 | char *dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
c0f0d812 | 2499 | unsigned long long new_data_offset; |
f9b08fec | 2500 | |
b397d7f3 N |
2501 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) |
2502 | continue; | |
50a4962f | 2503 | if (delta_disks < 0) { |
19ceb16d N |
2504 | /* Don't need any space as array is shrinking |
2505 | * just move data_offset up by min | |
2506 | */ | |
5582b118 | 2507 | if (data_offset == INVALID_SECTORS) |
c0f0d812 | 2508 | new_data_offset = sd->data_offset + min; |
19ceb16d | 2509 | else { |
c0f0d812 | 2510 | if (data_offset < sd->data_offset + min) { |
ed503f89 | 2511 | pr_err("--data-offset too small for %s\n", |
19ceb16d N |
2512 | dn); |
2513 | goto release; | |
2514 | } | |
c0f0d812 | 2515 | new_data_offset = data_offset; |
19ceb16d | 2516 | } |
50a4962f | 2517 | } else if (delta_disks > 0) { |
19ceb16d | 2518 | /* need space before */ |
f9b08fec | 2519 | if (before < min) { |
6a23fb9d N |
2520 | if (can_fallback) |
2521 | goto fallback; | |
ed503f89 | 2522 | pr_err("Insufficient head-space for reshape on %s\n", |
19ceb16d N |
2523 | dn); |
2524 | goto release; | |
2525 | } | |
5582b118 | 2526 | if (data_offset == INVALID_SECTORS) |
c0f0d812 | 2527 | new_data_offset = sd->data_offset - min; |
19ceb16d | 2528 | else { |
c0f0d812 | 2529 | if (data_offset > sd->data_offset - min) { |
ed503f89 | 2530 | pr_err("--data-offset too large for %s\n", |
19ceb16d N |
2531 | dn); |
2532 | goto release; | |
2533 | } | |
c0f0d812 | 2534 | new_data_offset = data_offset; |
19ceb16d N |
2535 | } |
2536 | } else { | |
2537 | if (dir == 0) { | |
f9b08fec N |
2538 | /* can move up or down. If 'data_offset' |
2539 | * was set we would have already decided, | |
2540 | * so just choose direction with most space. | |
19ceb16d | 2541 | */ |
c0f0d812 | 2542 | if (before > after) |
19ceb16d N |
2543 | dir = -1; |
2544 | else | |
2545 | dir = 1; | |
19ceb16d | 2546 | } |
b397d7f3 N |
2547 | sysfs_set_str(sra, NULL, "reshape_direction", |
2548 | dir == 1 ? "backwards" : "forwards"); | |
c0f0d812 N |
2549 | if (dir > 0) { |
2550 | /* Increase data offset */ | |
f9b08fec | 2551 | if (after < min) { |
6a23fb9d N |
2552 | if (can_fallback) |
2553 | goto fallback; | |
ed503f89 | 2554 | pr_err("Insufficient tail-space for reshape on %s\n", |
19ceb16d N |
2555 | dn); |
2556 | goto release; | |
2557 | } | |
5582b118 | 2558 | if (data_offset != INVALID_SECTORS && |
c0f0d812 | 2559 | data_offset < sd->data_offset + min) { |
ed503f89 | 2560 | pr_err("--data-offset too small on %s\n", |
19ceb16d N |
2561 | dn); |
2562 | goto release; | |
2563 | } | |
5582b118 | 2564 | if (data_offset != INVALID_SECTORS) |
c0f0d812 | 2565 | new_data_offset = data_offset; |
534f5432 N |
2566 | else |
2567 | new_data_offset = choose_offset(sd->data_offset, | |
2568 | sd->data_offset + after, | |
2569 | sd->data_offset + min, | |
2570 | sd->data_offset + after); | |
c0f0d812 N |
2571 | } else { |
2572 | /* Decrease data offset */ | |
f9b08fec | 2573 | if (before < min) { |
6a23fb9d N |
2574 | if (can_fallback) |
2575 | goto fallback; | |
ed503f89 | 2576 | pr_err("insufficient head-room on %s\n", |
19ceb16d N |
2577 | dn); |
2578 | goto release; | |
2579 | } | |
5582b118 | 2580 | if (data_offset != INVALID_SECTORS && |
c0f0d812 | 2581 | data_offset < sd->data_offset - min) { |
ed503f89 | 2582 | pr_err("--data-offset too small on %s\n", |
19ceb16d N |
2583 | dn); |
2584 | goto release; | |
2585 | } | |
5582b118 | 2586 | if (data_offset != INVALID_SECTORS) |
c0f0d812 | 2587 | new_data_offset = data_offset; |
534f5432 N |
2588 | else |
2589 | new_data_offset = choose_offset(sd->data_offset - before, | |
2590 | sd->data_offset, | |
2591 | sd->data_offset - before, | |
2592 | sd->data_offset - min); | |
19ceb16d N |
2593 | } |
2594 | } | |
a6a78630 N |
2595 | err = sysfs_set_num(sra, sd, "new_offset", new_data_offset); |
2596 | if (err < 0 && errno == E2BIG) { | |
2597 | /* try again after increasing data size to max */ | |
2598 | err = sysfs_set_num(sra, sd, "size", 0); | |
2599 | if (err < 0 && errno == EINVAL && | |
2600 | !(sd->disk.state & (1<<MD_DISK_SYNC))) { | |
2601 | /* some kernels have a bug where you cannot | |
2602 | * use '0' on spare devices. */ | |
2603 | sysfs_set_num(sra, sd, "size", | |
2604 | (sra->component_size + after)/2); | |
2605 | } | |
2606 | err = sysfs_set_num(sra, sd, "new_offset", | |
2607 | new_data_offset); | |
2608 | } | |
2609 | if (err < 0) { | |
d7e1f52b N |
2610 | if (errno == E2BIG && data_offset != INVALID_SECTORS) { |
2611 | pr_err("data-offset is too big for %s\n", | |
2612 | dn); | |
2613 | goto release; | |
2614 | } | |
9ad2a640 N |
2615 | if (sd == sra->devs && |
2616 | (errno == ENOENT || errno == E2BIG)) | |
2617 | /* Early kernel, no 'new_offset' file, | |
2618 | * or kernel doesn't like us. | |
93f174b9 N |
2619 | * For RAID5/6 this is not fatal |
2620 | */ | |
2621 | return 1; | |
ed503f89 | 2622 | pr_err("Cannot set new_offset for %s\n", |
19ceb16d N |
2623 | dn); |
2624 | break; | |
2625 | } | |
2626 | } | |
13bbb145 N |
2627 | return err; |
2628 | release: | |
2629 | return -1; | |
6a23fb9d N |
2630 | fallback: |
2631 | /* Just use a backup file */ | |
2632 | return 1; | |
13bbb145 N |
2633 | } |
2634 | ||
2635 | static int raid10_reshape(char *container, int fd, char *devname, | |
2636 | struct supertype *st, struct mdinfo *info, | |
2637 | struct reshape *reshape, | |
2638 | unsigned long long data_offset, | |
2639 | int force, int verbose) | |
2640 | { | |
2641 | /* Changing raid_disks, layout, chunksize or possibly | |
2642 | * just data_offset for a RAID10. | |
2643 | * We must always change data_offset. We change by at least | |
89ecd3cf | 2644 | * ->min_offset_change which is the largest of the old and new |
13bbb145 N |
2645 | * chunk sizes. |
2646 | * If raid_disks is increasing, then data_offset must decrease | |
2647 | * by at least this copy size. | |
2648 | * If raid_disks is unchanged, data_offset must increase or | |
89ecd3cf | 2649 | * decrease by at least min_offset_change but preferably by much more. |
13bbb145 N |
2650 | * We choose half of the available space. |
2651 | * If raid_disks is decreasing, data_offset must increase by | |
89ecd3cf | 2652 | * at least min_offset_change. To allow of this, component_size |
13bbb145 N |
2653 | * must be decreased by the same amount. |
2654 | * | |
2655 | * So we calculate the required minimum and direction, possibly | |
2656 | * reduce the component_size, then iterate through the devices | |
2657 | * and set the new_data_offset. | |
2658 | * If that all works, we set chunk_size, layout, raid_disks, and start | |
2659 | * 'reshape' | |
2660 | */ | |
2661 | struct mdinfo *sra; | |
2662 | unsigned long long min; | |
2663 | int err = 0; | |
2664 | ||
2665 | sra = sysfs_read(fd, NULL, | |
2666 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK | |
2667 | ); | |
2668 | if (!sra) { | |
ed503f89 | 2669 | pr_err("%s: Cannot get array details from sysfs\n", |
13bbb145 N |
2670 | devname); |
2671 | goto release; | |
2672 | } | |
89ecd3cf | 2673 | min = reshape->min_offset_change; |
13bbb145 N |
2674 | |
2675 | if (info->delta_disks) | |
2676 | sysfs_set_str(sra, NULL, "reshape_direction", | |
2677 | info->delta_disks < 0 ? "backwards" : "forwards"); | |
2678 | if (info->delta_disks < 0 && | |
89ecd3cf | 2679 | info->space_after < min) { |
13bbb145 N |
2680 | int rv = sysfs_set_num(sra, NULL, "component_size", |
2681 | (sra->component_size - | |
89ecd3cf | 2682 | min)/2); |
13bbb145 | 2683 | if (rv) { |
ed503f89 | 2684 | pr_err("cannot reduce component size\n"); |
13bbb145 N |
2685 | goto release; |
2686 | } | |
2687 | } | |
50a4962f | 2688 | err = set_new_data_offset(sra, st, devname, info->delta_disks, data_offset, |
6a23fb9d | 2689 | min, 0); |
93f174b9 N |
2690 | if (err == 1) { |
2691 | pr_err("Cannot set new_data_offset: RAID10 reshape not\n"); | |
2692 | cont_err("supported on this kernel\n"); | |
2693 | err = -1; | |
2694 | } | |
13bbb145 N |
2695 | if (err < 0) |
2696 | goto release; | |
2697 | ||
ee2429e0 | 2698 | if (!err && sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0) |
19ceb16d N |
2699 | err = errno; |
2700 | if (!err && sysfs_set_num(sra, NULL, "layout", reshape->after.layout) < 0) | |
2701 | err = errno; | |
2702 | if (!err && sysfs_set_num(sra, NULL, "raid_disks", | |
2703 | info->array.raid_disks + info->delta_disks) < 0) | |
2704 | err = errno; | |
2705 | if (!err && sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0) | |
2706 | err = errno; | |
2707 | if (err) { | |
ed503f89 | 2708 | pr_err("Cannot set array shape for %s\n", |
d33f1518 N |
2709 | devname); |
2710 | if (err == EBUSY && | |
2711 | (info->array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2712 | cont_err(" Bitmap must be removed before shape can be changed\n"); |
d33f1518 | 2713 | goto release; |
19ceb16d N |
2714 | } |
2715 | sysfs_free(sra); | |
2716 | return 0; | |
2717 | release: | |
2718 | sysfs_free(sra); | |
2719 | return 1; | |
2720 | } | |
2721 | ||
ee2429e0 N |
2722 | static void get_space_after(int fd, struct supertype *st, struct mdinfo *info) |
2723 | { | |
2724 | struct mdinfo *sra, *sd; | |
f3f09a52 LD |
2725 | /* Initialisation to silence compiler warning */ |
2726 | unsigned long long min_space_before = 0, min_space_after = 0; | |
ee2429e0 N |
2727 | int first = 1; |
2728 | ||
4dd2df09 | 2729 | sra = sysfs_read(fd, NULL, GET_DEVS); |
ee2429e0 N |
2730 | if (!sra) |
2731 | return; | |
2732 | for (sd = sra->devs; sd; sd = sd->next) { | |
2733 | char *dn; | |
2734 | int dfd; | |
2735 | struct supertype *st2; | |
2736 | struct mdinfo info2; | |
2737 | ||
2738 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
2739 | continue; | |
2740 | dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
2741 | dfd = dev_open(dn, O_RDONLY); | |
2742 | if (dfd < 0) | |
2743 | break; | |
2744 | st2 = dup_super(st); | |
2745 | if (st2->ss->load_super(st2,dfd, NULL)) { | |
2746 | close(dfd); | |
2747 | free(st2); | |
2748 | break; | |
2749 | } | |
2750 | close(dfd); | |
2751 | st2->ss->getinfo_super(st2, &info2, NULL); | |
2752 | st2->ss->free_super(st2); | |
2753 | free(st2); | |
2754 | if (first || | |
2755 | min_space_before > info2.space_before) | |
2756 | min_space_before = info2.space_before; | |
2757 | if (first || | |
2758 | min_space_after > info2.space_after) | |
2759 | min_space_after = info2.space_after; | |
2760 | first = 0; | |
2761 | } | |
2762 | if (sd == NULL && !first) { | |
2763 | info->space_after = min_space_after; | |
2764 | info->space_before = min_space_before; | |
2765 | } | |
2766 | sysfs_free(sra); | |
2767 | } | |
2768 | ||
434d167e N |
2769 | static void update_cache_size(char *container, struct mdinfo *sra, |
2770 | struct mdinfo *info, | |
2771 | int disks, unsigned long long blocks) | |
2772 | { | |
2773 | /* Check that the internal stripe cache is | |
2774 | * large enough, or it won't work. | |
2775 | * It must hold at least 4 stripes of the larger | |
2776 | * chunk size | |
2777 | */ | |
2778 | unsigned long cache; | |
2779 | cache = max(info->array.chunk_size, info->new_chunk); | |
2780 | cache *= 4; /* 4 stripes minimum */ | |
2781 | cache /= 512; /* convert to sectors */ | |
2782 | /* make sure there is room for 'blocks' with a bit to spare */ | |
2783 | if (cache < 16 + blocks / disks) | |
2784 | cache = 16 + blocks / disks; | |
caf9ac0c | 2785 | cache /= (4096/512); /* Convert from sectors to pages */ |
434d167e N |
2786 | |
2787 | if (sra->cache_size < cache) | |
2788 | subarray_set_num(container, sra, "stripe_cache_size", | |
2789 | cache+1); | |
2790 | } | |
2791 | ||
77afa056 N |
2792 | static int impose_reshape(struct mdinfo *sra, |
2793 | struct mdinfo *info, | |
2794 | struct supertype *st, | |
2795 | int fd, | |
2796 | int restart, | |
2797 | char *devname, char *container, | |
2798 | struct reshape *reshape) | |
2799 | { | |
2800 | struct mdu_array_info_s array; | |
2801 | ||
2802 | sra->new_chunk = info->new_chunk; | |
2803 | ||
2804 | if (restart) { | |
2805 | /* for external metadata checkpoint saved by mdmon can be lost | |
2806 | * or missed /due to e.g. crash/. Check if md is not during | |
2807 | * restart farther than metadata points to. | |
2808 | * If so, this means metadata information is obsolete. | |
2809 | */ | |
2810 | if (st->ss->external) | |
2811 | verify_reshape_position(info, reshape->level); | |
2812 | sra->reshape_progress = info->reshape_progress; | |
2813 | } else { | |
2814 | sra->reshape_progress = 0; | |
2815 | if (reshape->after.data_disks < reshape->before.data_disks) | |
2816 | /* start from the end of the new array */ | |
2817 | sra->reshape_progress = (sra->component_size | |
2818 | * reshape->after.data_disks); | |
2819 | } | |
2820 | ||
9cd39f01 | 2821 | md_get_array_info(fd, &array); |
77afa056 N |
2822 | if (info->array.chunk_size == info->new_chunk && |
2823 | reshape->before.layout == reshape->after.layout && | |
2824 | st->ss->external == 0) { | |
2825 | /* use SET_ARRAY_INFO but only if reshape hasn't started */ | |
2826 | array.raid_disks = reshape->after.data_disks + reshape->parity; | |
018a4882 | 2827 | if (!restart && md_set_array_info(fd, &array) != 0) { |
77afa056 N |
2828 | int err = errno; |
2829 | ||
2830 | pr_err("Cannot set device shape for %s: %s\n", | |
2831 | devname, strerror(errno)); | |
2832 | ||
2833 | if (err == EBUSY && | |
2834 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2835 | cont_err("Bitmap must be removed before shape can be changed\n"); |
77afa056 N |
2836 | |
2837 | goto release; | |
2838 | } | |
2839 | } else if (!restart) { | |
2840 | /* set them all just in case some old 'new_*' value | |
2841 | * persists from some earlier problem. | |
2842 | */ | |
2843 | int err = 0; | |
2844 | if (sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0) | |
2845 | err = errno; | |
2846 | if (!err && sysfs_set_num(sra, NULL, "layout", | |
2847 | reshape->after.layout) < 0) | |
2848 | err = errno; | |
2849 | if (!err && subarray_set_num(container, sra, "raid_disks", | |
2850 | reshape->after.data_disks + | |
2851 | reshape->parity) < 0) | |
2852 | err = errno; | |
2853 | if (err) { | |
2854 | pr_err("Cannot set device shape for %s\n", | |
2855 | devname); | |
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 | goto release; |
2861 | } | |
2862 | } | |
2863 | return 0; | |
2864 | release: | |
2865 | return -1; | |
2866 | } | |
2867 | ||
97e3a6a0 N |
2868 | static int impose_level(int fd, int level, char *devname, int verbose) |
2869 | { | |
2870 | char *c; | |
2871 | struct mdu_array_info_s array; | |
2872 | struct mdinfo info; | |
dae13137 JS |
2873 | |
2874 | if (sysfs_init(&info, fd, NULL)) { | |
2875 | pr_err("failed to intialize sysfs.\n"); | |
2876 | return 1; | |
2877 | } | |
97e3a6a0 | 2878 | |
9cd39f01 | 2879 | md_get_array_info(fd, &array); |
97e3a6a0 N |
2880 | if (level == 0 && |
2881 | (array.level >= 4 && array.level <= 6)) { | |
2882 | /* To convert to RAID0 we need to fail and | |
2883 | * remove any non-data devices. */ | |
2884 | int found = 0; | |
2885 | int d; | |
2886 | int data_disks = array.raid_disks - 1; | |
2887 | if (array.level == 6) | |
2888 | data_disks -= 1; | |
2889 | if (array.level == 5 && | |
2890 | array.layout != ALGORITHM_PARITY_N) | |
2891 | return -1; | |
2892 | if (array.level == 6 && | |
2893 | array.layout != ALGORITHM_PARITY_N_6) | |
2894 | return -1; | |
2895 | sysfs_set_str(&info, NULL,"sync_action", "idle"); | |
2896 | /* First remove any spares so no recovery starts */ | |
2897 | for (d = 0, found = 0; | |
2898 | d < MAX_DISKS && found < array.nr_disks; | |
2899 | d++) { | |
5e7be838 | 2900 | mdu_disk_info_t disk; |
97e3a6a0 | 2901 | disk.number = d; |
d97572f5 | 2902 | if (md_get_disk_info(fd, &disk) < 0) |
97e3a6a0 N |
2903 | continue; |
2904 | if (disk.major == 0 && disk.minor == 0) | |
2905 | continue; | |
2906 | found++; | |
2907 | if ((disk.state & (1 << MD_DISK_ACTIVE)) | |
2908 | && disk.raid_disk < data_disks) | |
2909 | /* keep this */ | |
2910 | continue; | |
2911 | ioctl(fd, HOT_REMOVE_DISK, | |
2912 | makedev(disk.major, disk.minor)); | |
2913 | } | |
2914 | /* Now fail anything left */ | |
9cd39f01 | 2915 | md_get_array_info(fd, &array); |
97e3a6a0 N |
2916 | for (d = 0, found = 0; |
2917 | d < MAX_DISKS && found < array.nr_disks; | |
2918 | d++) { | |
97e3a6a0 N |
2919 | mdu_disk_info_t disk; |
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++; | |
2926 | if ((disk.state & (1 << MD_DISK_ACTIVE)) | |
2927 | && disk.raid_disk < data_disks) | |
2928 | /* keep this */ | |
2929 | continue; | |
2930 | ioctl(fd, SET_DISK_FAULTY, | |
2931 | makedev(disk.major, disk.minor)); | |
1ab9ed2a | 2932 | hot_remove_disk(fd, makedev(disk.major, disk.minor), 1); |
97e3a6a0 N |
2933 | } |
2934 | } | |
2935 | c = map_num(pers, level); | |
2936 | if (c) { | |
2937 | int err = sysfs_set_str(&info, NULL, "level", c); | |
2938 | if (err) { | |
2939 | err = errno; | |
2940 | pr_err("%s: could not set level to %s\n", | |
2941 | devname, c); | |
2942 | if (err == EBUSY && | |
2943 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2944 | cont_err("Bitmap must be removed before level can be changed\n"); |
97e3a6a0 N |
2945 | return err; |
2946 | } | |
2947 | if (verbose >= 0) | |
2948 | pr_err("level of %s changed to %s\n", | |
2949 | devname, c); | |
2950 | } | |
2951 | return 0; | |
2952 | } | |
2953 | ||
84d11e6c N |
2954 | int sigterm = 0; |
2955 | static void catch_term(int sig) | |
2956 | { | |
2957 | sigterm = 1; | |
2958 | } | |
2959 | ||
b0b67933 N |
2960 | static int continue_via_systemd(char *devnm) |
2961 | { | |
2962 | int skipped, i, pid, status; | |
2963 | char pathbuf[1024]; | |
2964 | /* In a systemd/udev world, it is best to get systemd to | |
2965 | * run "mdadm --grow --continue" rather than running in the | |
2966 | * background. | |
2967 | */ | |
2968 | switch(fork()) { | |
2969 | case 0: | |
2970 | /* FIXME yuk. CLOSE_EXEC?? */ | |
2971 | skipped = 0; | |
2972 | for (i = 3; skipped < 20; i++) | |
2973 | if (close(i) < 0) | |
2974 | skipped++; | |
2975 | else | |
2976 | skipped = 0; | |
2977 | ||
2978 | /* Don't want to see error messages from | |
2979 | * systemctl. If the service doesn't exist, | |
2980 | * we fork ourselves. | |
2981 | */ | |
2982 | close(2); | |
2983 | open("/dev/null", O_WRONLY); | |
2984 | snprintf(pathbuf, sizeof(pathbuf), "mdadm-grow-continue@%s.service", | |
2985 | devnm); | |
2986 | status = execl("/usr/bin/systemctl", "systemctl", | |
2987 | "start", | |
2988 | pathbuf, NULL); | |
2989 | status = execl("/bin/systemctl", "systemctl", "start", | |
2990 | pathbuf, NULL); | |
2991 | exit(1); | |
2992 | case -1: /* Just do it ourselves. */ | |
2993 | break; | |
2994 | default: /* parent - good */ | |
2995 | pid = wait(&status); | |
2996 | if (pid >= 0 && status == 0) | |
2997 | return 1; | |
2998 | } | |
2999 | return 0; | |
3000 | } | |
3001 | ||
5da9ab98 N |
3002 | static int reshape_array(char *container, int fd, char *devname, |
3003 | struct supertype *st, struct mdinfo *info, | |
e2e53a2d | 3004 | int force, struct mddev_dev *devlist, |
19ceb16d | 3005 | unsigned long long data_offset, |
ba728be7 | 3006 | char *backup_file, int verbose, int forked, |
b76b30e0 | 3007 | int restart, int freeze_reshape) |
5da9ab98 N |
3008 | { |
3009 | struct reshape reshape; | |
3010 | int spares_needed; | |
3011 | char *msg; | |
3012 | int orig_level = UnSet; | |
434d167e | 3013 | int odisks; |
1f9b0e28 | 3014 | int delayed; |
7bc71196 | 3015 | |
5da9ab98 N |
3016 | struct mdu_array_info_s array; |
3017 | char *c; | |
e86c9dd6 | 3018 | |
e2e53a2d N |
3019 | struct mddev_dev *dv; |
3020 | int added_disks; | |
3021 | ||
d152f53e JS |
3022 | int *fdlist = NULL; |
3023 | unsigned long long *offsets = NULL; | |
5da9ab98 N |
3024 | int d; |
3025 | int nrdisks; | |
3026 | int err; | |
da8100ca | 3027 | unsigned long blocks; |
5da9ab98 N |
3028 | unsigned long long array_size; |
3029 | int done; | |
cf6ac177 | 3030 | struct mdinfo *sra = NULL; |
13ffbe89 | 3031 | char buf[20]; |
7bc71196 | 3032 | |
9468aeac N |
3033 | /* when reshaping a RAID0, the component_size might be zero. |
3034 | * So try to fix that up. | |
3035 | */ | |
9cd39f01 | 3036 | if (md_get_array_info(fd, &array) != 0) { |
9468aeac N |
3037 | dprintf("Cannot get array information.\n"); |
3038 | goto release; | |
3039 | } | |
3040 | if (array.level == 0 && info->component_size == 0) { | |
3041 | get_dev_size(fd, NULL, &array_size); | |
3042 | info->component_size = array_size / array.raid_disks; | |
3043 | } | |
3044 | ||
ee2429e0 N |
3045 | if (array.level == 10) |
3046 | /* Need space_after info */ | |
3047 | get_space_after(fd, st, info); | |
3048 | ||
3cb2aed2 N |
3049 | if (info->reshape_active) { |
3050 | int new_level = info->new_level; | |
3051 | info->new_level = UnSet; | |
ce4783d3 N |
3052 | if (info->delta_disks > 0) |
3053 | info->array.raid_disks -= info->delta_disks; | |
a73b0081 | 3054 | msg = analyse_change(devname, info, &reshape); |
3cb2aed2 | 3055 | info->new_level = new_level; |
ce4783d3 N |
3056 | if (info->delta_disks > 0) |
3057 | info->array.raid_disks += info->delta_disks; | |
fcdfb814 AK |
3058 | if (!restart) |
3059 | /* Make sure the array isn't read-only */ | |
3060 | ioctl(fd, RESTART_ARRAY_RW, 0); | |
3cb2aed2 | 3061 | } else |
a73b0081 | 3062 | msg = analyse_change(devname, info, &reshape); |
5da9ab98 | 3063 | if (msg) { |
a73b0081 N |
3064 | /* if msg == "", error has already been printed */ |
3065 | if (msg[0]) | |
3066 | pr_err("%s\n", msg); | |
631d7405 | 3067 | goto release; |
5da9ab98 | 3068 | } |
817ed7d6 N |
3069 | if (restart && |
3070 | (reshape.level != info->array.level || | |
3071 | reshape.before.layout != info->array.layout || | |
384e9be1 | 3072 | reshape.before.data_disks + reshape.parity |
ce4783d3 | 3073 | != info->array.raid_disks - max(0, info->delta_disks))) { |
7a862a02 | 3074 | pr_err("reshape info is not in native format - cannot continue.\n"); |
20a40eca N |
3075 | goto release; |
3076 | } | |
a93f87ee | 3077 | |
13ffbe89 PB |
3078 | if (st->ss->external && restart && (info->reshape_progress == 0) && |
3079 | !((sysfs_get_str(info, NULL, "sync_action", buf, sizeof(buf)) > 0) && | |
3080 | (strncmp(buf, "reshape", 7) == 0))) { | |
e1dd332a AK |
3081 | /* When reshape is restarted from '0', very begin of array |
3082 | * it is possible that for external metadata reshape and array | |
3083 | * configuration doesn't happen. | |
3084 | * Check if md has the same opinion, and reshape is restarted | |
3085 | * from 0. If so, this is regular reshape start after reshape | |
3086 | * switch in metadata to next array only. | |
3087 | */ | |
3088 | if ((verify_reshape_position(info, reshape.level) >= 0) && | |
3089 | (info->reshape_progress == 0)) | |
3090 | restart = 0; | |
3091 | } | |
a93f87ee N |
3092 | if (restart) { |
3093 | /* reshape already started. just skip to monitoring the reshape */ | |
3094 | if (reshape.backup_blocks == 0) | |
3095 | return 0; | |
8ecf12b9 N |
3096 | if (restart & RESHAPE_NO_BACKUP) |
3097 | return 0; | |
dfa4d769 N |
3098 | |
3099 | /* Need 'sra' down at 'started:' */ | |
3100 | sra = sysfs_read(fd, NULL, | |
3101 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK| | |
3102 | GET_CACHE); | |
3103 | if (!sra) { | |
3104 | pr_err("%s: Cannot get array details from sysfs\n", | |
3105 | devname); | |
3106 | goto release; | |
3107 | } | |
54ded86f N |
3108 | |
3109 | if (!backup_file) | |
3110 | backup_file = locate_backup(sra->sys_name); | |
3111 | ||
a93f87ee N |
3112 | goto started; |
3113 | } | |
a9c3e78f AK |
3114 | /* The container is frozen but the array may not be. |
3115 | * So freeze the array so spares don't get put to the wrong use | |
3116 | * FIXME there should probably be a cleaner separation between | |
3117 | * freeze_array and freeze_container. | |
3118 | */ | |
3119 | sysfs_freeze_array(info); | |
e06c4e59 | 3120 | /* Check we have enough spares to not be degraded */ |
e2e53a2d N |
3121 | added_disks = 0; |
3122 | for (dv = devlist; dv ; dv=dv->next) | |
3123 | added_disks++; | |
5da9ab98 N |
3124 | spares_needed = max(reshape.before.data_disks, |
3125 | reshape.after.data_disks) | |
3126 | + reshape.parity - array.raid_disks; | |
7bc71196 | 3127 | |
88c1a083 | 3128 | if (!force && |
e2e53a2d N |
3129 | info->new_level > 1 && info->array.level > 1 && |
3130 | spares_needed > info->array.spare_disks + added_disks) { | |
7a862a02 | 3131 | pr_err("Need %d spare%s to avoid degraded array, and only have %d.\n" |
e7b84f9d N |
3132 | " Use --force to over-ride this check.\n", |
3133 | spares_needed, | |
3134 | spares_needed == 1 ? "" : "s", | |
3135 | info->array.spare_disks + added_disks); | |
631d7405 | 3136 | goto release; |
7bc71196 | 3137 | } |
e06c4e59 N |
3138 | /* Check we have enough spares to not fail */ |
3139 | spares_needed = max(reshape.before.data_disks, | |
3140 | reshape.after.data_disks) | |
3141 | - array.raid_disks; | |
3142 | if ((info->new_level > 1 || info->new_level == 0) && | |
e2e53a2d | 3143 | spares_needed > info->array.spare_disks +added_disks) { |
7a862a02 | 3144 | pr_err("Need %d spare%s to create working array, and only have %d.\n", |
e7b84f9d N |
3145 | spares_needed, |
3146 | spares_needed == 1 ? "" : "s", | |
3147 | info->array.spare_disks + added_disks); | |
e06c4e59 N |
3148 | goto release; |
3149 | } | |
e86c9dd6 | 3150 | |
eae35f5c | 3151 | if (reshape.level != array.level) { |
97e3a6a0 N |
3152 | int err = impose_level(fd, reshape.level, devname, verbose); |
3153 | if (err) | |
631d7405 | 3154 | goto release; |
97e3a6a0 N |
3155 | info->new_layout = UnSet; /* after level change, |
3156 | * layout is meaningless */ | |
eae35f5c | 3157 | orig_level = array.level; |
3cd4e7c4 | 3158 | sysfs_freeze_array(info); |
e86c9dd6 | 3159 | |
16d4d84e AK |
3160 | if (reshape.level > 0 && st->ss->external) { |
3161 | /* make sure mdmon is aware of the new level */ | |
4dd2df09 | 3162 | if (mdmon_running(container)) |
78340e26 AK |
3163 | flush_mdmon(container); |
3164 | ||
4dd2df09 N |
3165 | if (!mdmon_running(container)) |
3166 | start_mdmon(container); | |
16d4d84e | 3167 | ping_monitor(container); |
4dd2df09 | 3168 | if (mdmon_running(container) && |
e919fb0a AK |
3169 | st->update_tail == NULL) |
3170 | st->update_tail = &st->updates; | |
16d4d84e | 3171 | } |
5da9ab98 | 3172 | } |
5da9ab98 N |
3173 | /* ->reshape_super might have chosen some spares from the |
3174 | * container that it wants to be part of the new array. | |
3175 | * We can collect them with ->container_content and give | |
3176 | * them to the kernel. | |
3177 | */ | |
3178 | if (st->ss->reshape_super && st->ss->container_content) { | |
3179 | char *subarray = strchr(info->text_version+1, '/')+1; | |
3180 | struct mdinfo *info2 = | |
3181 | st->ss->container_content(st, subarray); | |
3182 | struct mdinfo *d; | |
3183 | ||
2dd0d697 | 3184 | if (info2) { |
dae13137 JS |
3185 | if (sysfs_init(info2, fd, st->devnm)) { |
3186 | pr_err("unable to initialize sysfs for %s", | |
3187 | st->devnm); | |
3188 | free(info2); | |
3189 | goto release; | |
3190 | } | |
0d5ac3c6 N |
3191 | /* When increasing number of devices, we need to set |
3192 | * new raid_disks before adding these, or they might | |
3193 | * be rejected. | |
3194 | */ | |
3195 | if (reshape.backup_blocks && | |
3196 | reshape.after.data_disks > reshape.before.data_disks) | |
3197 | subarray_set_num(container, info2, "raid_disks", | |
3198 | reshape.after.data_disks + | |
3199 | reshape.parity); | |
5da9ab98 N |
3200 | for (d = info2->devs; d; d = d->next) { |
3201 | if (d->disk.state == 0 && | |
3202 | d->disk.raid_disk >= 0) { | |
3203 | /* This is a spare that wants to | |
3204 | * be part of the array. | |
3205 | */ | |
3206 | add_disk(fd, st, info2, d); | |
3207 | } | |
9860f271 | 3208 | } |
2dd0d697 AK |
3209 | sysfs_free(info2); |
3210 | } | |
5da9ab98 | 3211 | } |
e2e53a2d N |
3212 | /* We might have been given some devices to add to the |
3213 | * array. Now that the array has been changed to the right | |
3214 | * level and frozen, we can safely add them. | |
3215 | */ | |
31dbeda7 GJ |
3216 | if (devlist) { |
3217 | if (Manage_subdevs(devname, fd, devlist, verbose, | |
3218 | 0, NULL, 0)) | |
3219 | goto release; | |
3220 | } | |
1686dc25 | 3221 | |
e09233d0 | 3222 | if (reshape.backup_blocks == 0 && data_offset != INVALID_SECTORS) |
8876bf0b | 3223 | reshape.backup_blocks = reshape.before.data_disks * info->array.chunk_size/512; |
b4f8e38b | 3224 | if (reshape.backup_blocks == 0) { |
5da9ab98 N |
3225 | /* No restriping needed, but we might need to impose |
3226 | * some more changes: layout, raid_disks, chunk_size | |
e86c9dd6 | 3227 | */ |
24aebf3a | 3228 | /* read current array info */ |
9cd39f01 | 3229 | if (md_get_array_info(fd, &array) != 0) { |
83732c28 | 3230 | dprintf("Cannot get array information.\n"); |
24aebf3a KW |
3231 | goto release; |
3232 | } | |
3233 | /* compare current array info with new values and if | |
3234 | * it is different update them to new */ | |
5da9ab98 | 3235 | if (info->new_layout != UnSet && |
24aebf3a KW |
3236 | info->new_layout != array.layout) { |
3237 | array.layout = info->new_layout; | |
018a4882 | 3238 | if (md_set_array_info(fd, &array) != 0) { |
e7b84f9d | 3239 | pr_err("failed to set new layout\n"); |
631d7405 | 3240 | goto release; |
ba728be7 | 3241 | } else if (verbose >= 0) |
5da9ab98 | 3242 | printf("layout for %s set to %d\n", |
24aebf3a | 3243 | devname, array.layout); |
5da9ab98 N |
3244 | } |
3245 | if (info->delta_disks != UnSet && | |
24aebf3a KW |
3246 | info->delta_disks != 0 && |
3247 | array.raid_disks != (info->array.raid_disks + info->delta_disks)) { | |
3248 | array.raid_disks += info->delta_disks; | |
018a4882 | 3249 | if (md_set_array_info(fd, &array) != 0) { |
e7b84f9d | 3250 | pr_err("failed to set raid disks\n"); |
631d7405 | 3251 | goto release; |
ba728be7 | 3252 | } else if (verbose >= 0) { |
5da9ab98 | 3253 | printf("raid_disks for %s set to %d\n", |
24aebf3a KW |
3254 | devname, array.raid_disks); |
3255 | } | |
5da9ab98 N |
3256 | } |
3257 | if (info->new_chunk != 0 && | |
24aebf3a | 3258 | info->new_chunk != array.chunk_size) { |
5da9ab98 N |
3259 | if (sysfs_set_num(info, NULL, |
3260 | "chunk_size", info->new_chunk) != 0) { | |
e7b84f9d | 3261 | pr_err("failed to set chunk size\n"); |
631d7405 | 3262 | goto release; |
ba728be7 | 3263 | } else if (verbose >= 0) |
5da9ab98 | 3264 | printf("chunk size for %s set to %d\n", |
24aebf3a | 3265 | devname, array.chunk_size); |
4725bc31 | 3266 | } |
e35b189b | 3267 | unfreeze(st); |
631d7405 | 3268 | return 0; |
5da9ab98 | 3269 | } |
19678e53 | 3270 | |
5da9ab98 N |
3271 | /* |
3272 | * There are three possibilities. | |
3273 | * 1/ The array will shrink. | |
3274 | * We need to ensure the reshape will pause before reaching | |
3275 | * the 'critical section'. We also need to fork and wait for | |
24daa16f | 3276 | * that to happen. When it does we |
5da9ab98 N |
3277 | * suspend/backup/complete/unfreeze |
3278 | * | |
3279 | * 2/ The array will not change size. | |
3280 | * This requires that we keep a backup of a sliding window | |
3281 | * so that we can restore data after a crash. So we need | |
3282 | * to fork and monitor progress. | |
3283 | * In future we will allow the data_offset to change, so | |
3284 | * a sliding backup becomes unnecessary. | |
3285 | * | |
3286 | * 3/ The array will grow. This is relatively easy. | |
3287 | * However the kernel's restripe routines will cheerfully | |
3288 | * overwrite some early data before it is safe. So we | |
3289 | * need to make a backup of the early parts of the array | |
3290 | * and be ready to restore it if rebuild aborts very early. | |
3291 | * For externally managed metadata, we still need a forked | |
3292 | * child to monitor the reshape and suspend IO over the region | |
3293 | * that is being reshaped. | |
3294 | * | |
3295 | * We backup data by writing it to one spare, or to a | |
3296 | * file which was given on command line. | |
3297 | * | |
3298 | * In each case, we first make sure that storage is available | |
3299 | * for the required backup. | |
3300 | * Then we: | |
3301 | * - request the shape change. | |
3302 | * - fork to handle backup etc. | |
3303 | */ | |
5da9ab98 N |
3304 | /* Check that we can hold all the data */ |
3305 | get_dev_size(fd, NULL, &array_size); | |
3306 | if (reshape.new_size < (array_size/512)) { | |
e7b84f9d N |
3307 | pr_err("this change will reduce the size of the array.\n" |
3308 | " use --grow --array-size first to truncate array.\n" | |
3309 | " e.g. mdadm --grow %s --array-size %llu\n", | |
3310 | devname, reshape.new_size/2); | |
5da9ab98 N |
3311 | goto release; |
3312 | } | |
7236ee7a | 3313 | |
19ceb16d | 3314 | if (array.level == 10) { |
033d0929 | 3315 | /* Reshaping RAID10 does not require any data backup by |
19ceb16d N |
3316 | * user-space. Instead it requires that the data_offset |
3317 | * is changed to avoid the need for backup. | |
3318 | * So this is handled very separately | |
3319 | */ | |
3320 | if (restart) | |
3321 | /* Nothing to do. */ | |
3322 | return 0; | |
3323 | return raid10_reshape(container, fd, devname, st, info, | |
3324 | &reshape, data_offset, | |
3325 | force, verbose); | |
3326 | } | |
4dd2df09 | 3327 | sra = sysfs_read(fd, NULL, |
3656edcd | 3328 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK| |
5da9ab98 | 3329 | GET_CACHE); |
5da9ab98 | 3330 | if (!sra) { |
e7b84f9d | 3331 | pr_err("%s: Cannot get array details from sysfs\n", |
5da9ab98 | 3332 | devname); |
5da9ab98 N |
3333 | goto release; |
3334 | } | |
7236ee7a | 3335 | |
8192902f | 3336 | if (!backup_file) |
199f1a1f N |
3337 | switch(set_new_data_offset(sra, st, devname, |
3338 | reshape.after.data_disks - reshape.before.data_disks, | |
8192902f | 3339 | data_offset, |
6a23fb9d | 3340 | reshape.min_offset_change, 1)) { |
63c12c89 N |
3341 | case -1: |
3342 | goto release; | |
3343 | case 0: | |
3344 | /* Updated data_offset, so it's easy now */ | |
3345 | update_cache_size(container, sra, info, | |
3346 | min(reshape.before.data_disks, | |
3347 | reshape.after.data_disks), | |
3348 | reshape.backup_blocks); | |
3349 | ||
3350 | /* Right, everything seems fine. Let's kick things off. | |
3351 | */ | |
3352 | sync_metadata(st); | |
3353 | ||
3354 | if (impose_reshape(sra, info, st, fd, restart, | |
3355 | devname, container, &reshape) < 0) | |
3356 | goto release; | |
3357 | if (sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0) { | |
783bbc2b N |
3358 | struct mdinfo *sd; |
3359 | if (errno != EINVAL) { | |
3360 | pr_err("Failed to initiate reshape!\n"); | |
3361 | goto release; | |
3362 | } | |
3363 | /* revert data_offset and try the old way */ | |
3364 | for (sd = sra->devs; sd; sd = sd->next) { | |
3365 | sysfs_set_num(sra, sd, "new_offset", | |
3366 | sd->data_offset); | |
3367 | sysfs_set_str(sra, NULL, "reshape_direction", | |
3368 | "forwards"); | |
3369 | } | |
3370 | break; | |
63c12c89 | 3371 | } |
97e3a6a0 N |
3372 | if (info->new_level == reshape.level) |
3373 | return 0; | |
3374 | /* need to adjust level when reshape completes */ | |
3375 | switch(fork()) { | |
3376 | case -1: /* ignore error, but don't wait */ | |
3377 | return 0; | |
3378 | default: /* parent */ | |
3379 | return 0; | |
3380 | case 0: | |
3381 | map_fork(); | |
3382 | break; | |
3383 | } | |
3377ee42 | 3384 | close(fd); |
97e3a6a0 | 3385 | wait_reshape(sra); |
3377ee42 N |
3386 | fd = open_dev(sra->sys_name); |
3387 | if (fd >= 0) | |
3388 | impose_level(fd, info->new_level, devname, verbose); | |
63c12c89 N |
3389 | return 0; |
3390 | case 1: /* Couldn't set data_offset, try the old way */ | |
3391 | if (data_offset != INVALID_SECTORS) { | |
3392 | pr_err("Cannot update data_offset on this array\n"); | |
3393 | goto release; | |
3394 | } | |
3395 | break; | |
3396 | } | |
3397 | ||
8ecf12b9 | 3398 | started: |
5da9ab98 N |
3399 | /* Decide how many blocks (sectors) for a reshape |
3400 | * unit. The number we have so far is just a minimum | |
3401 | */ | |
b4f8e38b | 3402 | blocks = reshape.backup_blocks; |
24daa16f | 3403 | if (reshape.before.data_disks == |
5da9ab98 N |
3404 | reshape.after.data_disks) { |
3405 | /* Make 'blocks' bigger for better throughput, but | |
3406 | * not so big that we reject it below. | |
3407 | * Try for 16 megabytes | |
3408 | */ | |
3409 | while (blocks * 32 < sra->component_size && | |
3410 | blocks < 16*1024*2) | |
3411 | blocks *= 2; | |
3412 | } else | |
7a862a02 | 3413 | pr_err("Need to backup %luK of critical section..\n", blocks/2); |
5da9ab98 N |
3414 | |
3415 | if (blocks >= sra->component_size/2) { | |
7a862a02 | 3416 | pr_err("%s: Something wrong - reshape aborted\n", |
5da9ab98 | 3417 | devname); |
5da9ab98 N |
3418 | goto release; |
3419 | } | |
7236ee7a | 3420 | |
5da9ab98 N |
3421 | /* Now we need to open all these devices so we can read/write. |
3422 | */ | |
b8b286a6 N |
3423 | nrdisks = max(reshape.before.data_disks, |
3424 | reshape.after.data_disks) + reshape.parity | |
3425 | + sra->array.spare_disks; | |
503975b9 N |
3426 | fdlist = xcalloc((1+nrdisks), sizeof(int)); |
3427 | offsets = xcalloc((1+nrdisks), sizeof(offsets[0])); | |
e380d3be | 3428 | |
b8b286a6 N |
3429 | odisks = reshape.before.data_disks + reshape.parity; |
3430 | d = reshape_prepare_fdlist(devname, sra, odisks, | |
5da9ab98 N |
3431 | nrdisks, blocks, backup_file, |
3432 | fdlist, offsets); | |
8e7ddc5f | 3433 | if (d < odisks) { |
5da9ab98 N |
3434 | goto release; |
3435 | } | |
13c37ad3 AK |
3436 | if ((st->ss->manage_reshape == NULL) || |
3437 | (st->ss->recover_backup == NULL)) { | |
3438 | if (backup_file == NULL) { | |
3439 | if (reshape.after.data_disks <= | |
3440 | reshape.before.data_disks) { | |
be7c26b4 N |
3441 | pr_err("%s: Cannot grow - need backup-file\n", |
3442 | devname); | |
3443 | pr_err(" Please provide one with \"--backup=...\"\n"); | |
13c37ad3 | 3444 | goto release; |
8e7ddc5f | 3445 | } else if (d == odisks) { |
7a862a02 | 3446 | pr_err("%s: Cannot grow - need a spare or backup-file to backup critical section\n", devname); |
13c37ad3 AK |
3447 | goto release; |
3448 | } | |
3449 | } else { | |
3450 | if (!reshape_open_backup_file(backup_file, fd, devname, | |
3451 | (signed)blocks, | |
3452 | fdlist+d, offsets+d, | |
54ded86f | 3453 | sra->sys_name, |
13c37ad3 AK |
3454 | restart)) { |
3455 | goto release; | |
3456 | } | |
3457 | d++; | |
e86c9dd6 | 3458 | } |
5da9ab98 | 3459 | } |
7236ee7a | 3460 | |
434d167e N |
3461 | update_cache_size(container, sra, info, |
3462 | min(reshape.before.data_disks, reshape.after.data_disks), | |
3463 | blocks); | |
5da9ab98 N |
3464 | |
3465 | /* Right, everything seems fine. Let's kick things off. | |
3466 | * If only changing raid_disks, use ioctl, else use | |
3467 | * sysfs. | |
3468 | */ | |
3469 | sync_metadata(st); | |
3470 | ||
77afa056 N |
3471 | if (impose_reshape(sra, info, st, fd, restart, |
3472 | devname, container, &reshape) < 0) | |
3473 | goto release; | |
e86c9dd6 | 3474 | |
27a1e5b5 N |
3475 | err = start_reshape(sra, restart, reshape.before.data_disks, |
3476 | reshape.after.data_disks); | |
fab32c97 | 3477 | if (err) { |
e7b84f9d N |
3478 | pr_err("Cannot %s reshape for %s\n", |
3479 | restart ? "continue" : "start", | |
3480 | devname); | |
fab32c97 AK |
3481 | goto release; |
3482 | } | |
a93f87ee N |
3483 | if (restart) |
3484 | sysfs_set_str(sra, NULL, "array_state", "active"); | |
b76b30e0 AK |
3485 | if (freeze_reshape) { |
3486 | free(fdlist); | |
3487 | free(offsets); | |
3488 | sysfs_free(sra); | |
7a862a02 | 3489 | pr_err("Reshape has to be continued from location %llu when root filesystem has been mounted.\n", |
b76b30e0 AK |
3490 | sra->reshape_progress); |
3491 | return 1; | |
3492 | } | |
5da9ab98 | 3493 | |
b0b67933 N |
3494 | if (!forked && !check_env("MDADM_NO_SYSTEMCTL")) |
3495 | if (continue_via_systemd(container ?: sra->sys_name)) { | |
3496 | free(fdlist); | |
3497 | free(offsets); | |
3498 | sysfs_free(sra); | |
3499 | return 0; | |
5e76dce1 | 3500 | } |
5e76dce1 | 3501 | |
5da9ab98 N |
3502 | /* Now we just need to kick off the reshape and watch, while |
3503 | * handling backups of the data... | |
3504 | * This is all done by a forked background process. | |
3505 | */ | |
3506 | switch(forked ? 0 : fork()) { | |
6b2d630c | 3507 | case -1: |
e7b84f9d | 3508 | pr_err("Cannot run child to monitor reshape: %s\n", |
6b2d630c | 3509 | strerror(errno)); |
6b2d630c | 3510 | abort_reshape(sra); |
631d7405 | 3511 | goto release; |
6b2d630c | 3512 | default: |
d152f53e JS |
3513 | free(fdlist); |
3514 | free(offsets); | |
3515 | sysfs_free(sra); | |
6b2d630c | 3516 | return 0; |
5da9ab98 | 3517 | case 0: |
cc700db3 | 3518 | map_fork(); |
6b2d630c N |
3519 | break; |
3520 | } | |
5da9ab98 | 3521 | |
1f9b0e28 N |
3522 | /* If another array on the same devices is busy, the |
3523 | * reshape will wait for them. This would mean that | |
3524 | * the first section that we suspend will stay suspended | |
3525 | * for a long time. So check on that possibility | |
3526 | * by looking for "DELAYED" in /proc/mdstat, and if found, | |
3527 | * wait a while | |
3528 | */ | |
3529 | do { | |
3530 | struct mdstat_ent *mds, *m; | |
3531 | delayed = 0; | |
a7a0d8a1 | 3532 | mds = mdstat_read(1, 0); |
ae0dcfbd | 3533 | for (m = mds; m; m = m->next) |
4dd2df09 | 3534 | if (strcmp(m->devnm, sra->sys_name) == 0) { |
1f9b0e28 N |
3535 | if (m->resync && |
3536 | m->percent == RESYNC_DELAYED) | |
3537 | delayed = 1; | |
3538 | if (m->resync == 0) | |
3539 | /* Haven't started the reshape thread | |
3540 | * yet, wait a bit | |
3541 | */ | |
3542 | delayed = 2; | |
3543 | break; | |
3544 | } | |
3545 | free_mdstat(mds); | |
3546 | if (delayed == 1 && get_linux_version() < 3007000) { | |
3547 | pr_err("Reshape is delayed, but cannot wait carefully with this kernel.\n" | |
3548 | " You might experience problems until other reshapes complete.\n"); | |
3549 | delayed = 0; | |
3550 | } | |
3551 | if (delayed) | |
a7a0d8a1 | 3552 | mdstat_wait(30 - (delayed-1) * 25); |
1f9b0e28 | 3553 | } while (delayed); |
a7a0d8a1 | 3554 | mdstat_close(); |
6b2d630c N |
3555 | close(fd); |
3556 | if (check_env("MDADM_GROW_VERIFY")) | |
3557 | fd = open(devname, O_RDONLY | O_DIRECT); | |
3558 | else | |
3559 | fd = -1; | |
3560 | mlockall(MCL_FUTURE); | |
5da9ab98 | 3561 | |
84d11e6c N |
3562 | signal(SIGTERM, catch_term); |
3563 | ||
6b2d630c N |
3564 | if (st->ss->external) { |
3565 | /* metadata handler takes it from here */ | |
3566 | done = st->ss->manage_reshape( | |
3567 | fd, sra, &reshape, st, blocks, | |
3568 | fdlist, offsets, | |
3569 | d - odisks, fdlist+odisks, | |
3570 | offsets+odisks); | |
3571 | } else | |
3572 | done = child_monitor( | |
3573 | fd, sra, &reshape, st, blocks, | |
3574 | fdlist, offsets, | |
3575 | d - odisks, fdlist+odisks, | |
3576 | offsets+odisks); | |
3577 | ||
d152f53e JS |
3578 | free(fdlist); |
3579 | free(offsets); | |
3580 | ||
54ded86f N |
3581 | if (backup_file && done) { |
3582 | char *bul; | |
54ded86f N |
3583 | bul = make_backup(sra->sys_name); |
3584 | if (bul) { | |
5e76dce1 | 3585 | char buf[1024]; |
9eb5ce5a | 3586 | int l = readlink(bul, buf, sizeof(buf) - 1); |
5e76dce1 N |
3587 | if (l > 0) { |
3588 | buf[l]=0; | |
3589 | unlink(buf); | |
3590 | } | |
54ded86f N |
3591 | unlink(bul); |
3592 | free(bul); | |
3593 | } | |
5e76dce1 | 3594 | unlink(backup_file); |
54ded86f | 3595 | } |
6b2d630c N |
3596 | if (!done) { |
3597 | abort_reshape(sra); | |
3598 | goto out; | |
3599 | } | |
1cbc5680 N |
3600 | |
3601 | if (!st->ss->external && | |
3602 | !(reshape.before.data_disks != reshape.after.data_disks | |
3603 | && info->custom_array_size) && | |
3604 | info->new_level == reshape.level && | |
3605 | !forked) { | |
3606 | /* no need to wait for the reshape to finish as | |
3607 | * there is nothing more to do. | |
3608 | */ | |
d152f53e | 3609 | sysfs_free(sra); |
1cbc5680 N |
3610 | exit(0); |
3611 | } | |
3612 | wait_reshape(sra); | |
3613 | ||
3614 | if (st->ss->external) { | |
3615 | /* Re-load the metadata as much could have changed */ | |
4dd2df09 | 3616 | int cfd = open_dev(st->container_devnm); |
1cbc5680 | 3617 | if (cfd >= 0) { |
78340e26 | 3618 | flush_mdmon(container); |
1cbc5680 N |
3619 | st->ss->free_super(st); |
3620 | st->ss->load_container(st, cfd, container); | |
3621 | close(cfd); | |
3622 | } | |
3623 | } | |
3624 | ||
6b2d630c N |
3625 | /* set new array size if required customer_array_size is used |
3626 | * by this metadata. | |
3627 | */ | |
3628 | if (reshape.before.data_disks != | |
3629 | reshape.after.data_disks && | |
54397ed9 AK |
3630 | info->custom_array_size) |
3631 | set_array_size(st, info, info->text_version); | |
582496b2 | 3632 | |
6b2d630c | 3633 | if (info->new_level != reshape.level) { |
97e3a6a0 N |
3634 | if (fd < 0) |
3635 | fd = open(devname, O_RDONLY); | |
3636 | impose_level(fd, info->new_level, devname, verbose); | |
3637 | close(fd); | |
e919fb0a AK |
3638 | if (info->new_level == 0) |
3639 | st->update_tail = NULL; | |
7236ee7a | 3640 | } |
6b2d630c | 3641 | out: |
d152f53e | 3642 | sysfs_free(sra); |
6b2d630c N |
3643 | if (forked) |
3644 | return 0; | |
e84f2c00 | 3645 | unfreeze(st); |
6b2d630c | 3646 | exit(0); |
e86c9dd6 | 3647 | |
6b2d630c | 3648 | release: |
d152f53e JS |
3649 | free(fdlist); |
3650 | free(offsets); | |
1cbc5680 | 3651 | if (orig_level != UnSet && sra) { |
7236ee7a N |
3652 | c = map_num(pers, orig_level); |
3653 | if (c && sysfs_set_str(sra, NULL, "level", c) == 0) | |
e7b84f9d | 3654 | pr_err("aborting level change\n"); |
7236ee7a | 3655 | } |
d152f53e | 3656 | sysfs_free(sra); |
9202b8eb N |
3657 | if (!forked) |
3658 | unfreeze(st); | |
631d7405 | 3659 | return 1; |
7236ee7a | 3660 | } |
e86c9dd6 | 3661 | |
9ad6f6e6 AK |
3662 | /* mdfd handle is passed to be closed in child process (after fork). |
3663 | */ | |
493f5dd6 | 3664 | int reshape_container(char *container, char *devname, |
9ad6f6e6 | 3665 | int mdfd, |
24daa16f | 3666 | struct supertype *st, |
5da9ab98 N |
3667 | struct mdinfo *info, |
3668 | int force, | |
b0140ae8 N |
3669 | char *backup_file, int verbose, |
3670 | int forked, int restart, int freeze_reshape) | |
5da9ab98 | 3671 | { |
1bb174ba | 3672 | struct mdinfo *cc = NULL; |
bcc9e9ed | 3673 | int rv = restart; |
4dd2df09 | 3674 | char last_devnm[32] = ""; |
1bb174ba | 3675 | |
d8eb27f7 | 3676 | /* component_size is not meaningful for a container, |
7ec0996c | 3677 | * so pass '0' meaning 'no change' |
d8eb27f7 | 3678 | */ |
493f5dd6 | 3679 | if (!restart && |
7ec0996c | 3680 | reshape_super(st, 0, info->new_level, |
5da9ab98 | 3681 | info->new_layout, info->new_chunk, |
41784c88 | 3682 | info->array.raid_disks, info->delta_disks, |
016e00f5 | 3683 | backup_file, devname, APPLY_METADATA_CHANGES, |
ba728be7 | 3684 | verbose)) { |
9e325442 | 3685 | unfreeze(st); |
5da9ab98 | 3686 | return 1; |
9e325442 | 3687 | } |
5da9ab98 N |
3688 | |
3689 | sync_metadata(st); | |
3690 | ||
1bb174ba AK |
3691 | /* ping monitor to be sure that update is on disk |
3692 | */ | |
3693 | ping_monitor(container); | |
5da9ab98 | 3694 | |
40b941b8 | 3695 | if (!forked && !freeze_reshape && !check_env("MDADM_NO_SYSTEMCTL")) |
4e0eb0db N |
3696 | if (continue_via_systemd(container)) |
3697 | return 0; | |
3698 | ||
b0140ae8 | 3699 | switch (forked ? 0 : fork()) { |
5da9ab98 N |
3700 | case -1: /* error */ |
3701 | perror("Cannot fork to complete reshape\n"); | |
9e325442 | 3702 | unfreeze(st); |
5da9ab98 N |
3703 | return 1; |
3704 | default: /* parent */ | |
b76b30e0 | 3705 | if (!freeze_reshape) |
7a862a02 | 3706 | printf("%s: multi-array reshape continues in background\n", Name); |
5da9ab98 N |
3707 | return 0; |
3708 | case 0: /* child */ | |
cc700db3 | 3709 | map_fork(); |
5da9ab98 N |
3710 | break; |
3711 | } | |
3712 | ||
9ad6f6e6 AK |
3713 | /* close unused handle in child process |
3714 | */ | |
3715 | if (mdfd > -1) | |
3716 | close(mdfd); | |
3717 | ||
1bb174ba AK |
3718 | while(1) { |
3719 | /* For each member array with reshape_active, | |
3720 | * we need to perform the reshape. | |
3721 | * We pick the first array that needs reshaping and | |
3722 | * reshape it. reshape_array() will re-read the metadata | |
3723 | * so the next time through a different array should be | |
3724 | * ready for reshape. | |
493f5dd6 N |
3725 | * It is possible that the 'different' array will not |
3726 | * be assembled yet. In that case we simple exit. | |
3727 | * When it is assembled, the mdadm which assembles it | |
3728 | * will take over the reshape. | |
1bb174ba AK |
3729 | */ |
3730 | struct mdinfo *content; | |
5da9ab98 N |
3731 | int fd; |
3732 | struct mdstat_ent *mdstat; | |
5da9ab98 | 3733 | char *adev; |
13db17bd | 3734 | dev_t devid; |
5da9ab98 | 3735 | |
1bb174ba | 3736 | sysfs_free(cc); |
5da9ab98 | 3737 | |
1bb174ba AK |
3738 | cc = st->ss->container_content(st, NULL); |
3739 | ||
3740 | for (content = cc; content ; content = content->next) { | |
3741 | char *subarray; | |
3742 | if (!content->reshape_active) | |
3743 | continue; | |
3744 | ||
3745 | subarray = strchr(content->text_version+1, '/')+1; | |
4dd2df09 | 3746 | mdstat = mdstat_by_subdev(subarray, container); |
1bb174ba AK |
3747 | if (!mdstat) |
3748 | continue; | |
1ca90aa6 | 3749 | if (mdstat->active == 0) { |
4dd2df09 N |
3750 | pr_err("Skipping inactive array %s.\n", |
3751 | mdstat->devnm); | |
1ca90aa6 AK |
3752 | free_mdstat(mdstat); |
3753 | mdstat = NULL; | |
3754 | continue; | |
3755 | } | |
1bb174ba AK |
3756 | break; |
3757 | } | |
3758 | if (!content) | |
3759 | break; | |
5da9ab98 | 3760 | |
4dd2df09 N |
3761 | devid = devnm2devid(mdstat->devnm); |
3762 | adev = map_dev(major(devid), minor(devid), 0); | |
5da9ab98 | 3763 | if (!adev) |
1bb174ba AK |
3764 | adev = content->text_version; |
3765 | ||
4dd2df09 | 3766 | fd = open_dev(mdstat->devnm); |
97a3490c | 3767 | if (fd < 0) { |
1ade5cc1 | 3768 | pr_err("Device %s cannot be opened for reshape.\n", adev); |
97a3490c AK |
3769 | break; |
3770 | } | |
3771 | ||
4dd2df09 | 3772 | if (strcmp(last_devnm, mdstat->devnm) == 0) { |
2d04d7e5 AK |
3773 | /* Do not allow for multiple reshape_array() calls for |
3774 | * the same array. | |
3775 | * It can happen when reshape_array() returns without | |
3776 | * error, when reshape is not finished (wrong reshape | |
3777 | * starting/continuation conditions). Mdmon doesn't | |
3778 | * switch to next array in container and reentry | |
3779 | * conditions for the same array occur. | |
3780 | * This is possibly interim until the behaviour of | |
3781 | * reshape_array is resolved(). | |
3782 | */ | |
7a862a02 | 3783 | printf("%s: Multiple reshape execution detected for device %s.\n", Name, adev); |
2d04d7e5 AK |
3784 | close(fd); |
3785 | break; | |
3786 | } | |
4dd2df09 | 3787 | strcpy(last_devnm, mdstat->devnm); |
2d04d7e5 | 3788 | |
dae13137 JS |
3789 | if (sysfs_init(content, fd, mdstat->devnm)) { |
3790 | pr_err("Unable to initialize sysfs for %s\n", | |
3791 | mdstat->devnm); | |
3792 | rv = 1; | |
3793 | break; | |
3794 | } | |
5da9ab98 | 3795 | |
4dd2df09 | 3796 | if (mdmon_running(container)) |
78340e26 AK |
3797 | flush_mdmon(container); |
3798 | ||
1bb174ba | 3799 | rv = reshape_array(container, fd, adev, st, |
ca36d707 | 3800 | content, force, NULL, INVALID_SECTORS, |
ba728be7 | 3801 | backup_file, verbose, 1, restart, |
b76b30e0 | 3802 | freeze_reshape); |
5da9ab98 | 3803 | close(fd); |
b76b30e0 AK |
3804 | |
3805 | if (freeze_reshape) { | |
3806 | sysfs_free(cc); | |
3807 | exit(0); | |
3808 | } | |
3809 | ||
493f5dd6 | 3810 | restart = 0; |
5da9ab98 N |
3811 | if (rv) |
3812 | break; | |
78340e26 | 3813 | |
4dd2df09 | 3814 | if (mdmon_running(container)) |
78340e26 | 3815 | flush_mdmon(container); |
5da9ab98 | 3816 | } |
bcc9e9ed AK |
3817 | if (!rv) |
3818 | unfreeze(st); | |
1bb174ba | 3819 | sysfs_free(cc); |
5da9ab98 N |
3820 | exit(0); |
3821 | } | |
3822 | ||
7236ee7a N |
3823 | /* |
3824 | * We run a child process in the background which performs the following | |
3825 | * steps: | |
3826 | * - wait for resync to reach a certain point | |
3827 | * - suspend io to the following section | |
3828 | * - backup that section | |
3829 | * - allow resync to proceed further | |
3830 | * - resume io | |
3831 | * - discard the backup. | |
3832 | * | |
3833 | * When are combined in slightly different ways in the three cases. | |
3834 | * Grow: | |
3835 | * - suspend/backup/allow/wait/resume/discard | |
3836 | * Shrink: | |
3837 | * - allow/wait/suspend/backup/allow/wait/resume/discard | |
3838 | * same-size: | |
3839 | * - wait/resume/discard/suspend/backup/allow | |
3840 | * | |
3841 | * suspend/backup/allow always come together | |
3842 | * wait/resume/discard do too. | |
3843 | * For the same-size case we have two backups to improve flow. | |
24daa16f | 3844 | * |
7236ee7a | 3845 | */ |
e86c9dd6 | 3846 | |
7443ee81 N |
3847 | int progress_reshape(struct mdinfo *info, struct reshape *reshape, |
3848 | unsigned long long backup_point, | |
3849 | unsigned long long wait_point, | |
3850 | unsigned long long *suspend_point, | |
a6b2d86c | 3851 | unsigned long long *reshape_completed, int *frozen) |
7443ee81 N |
3852 | { |
3853 | /* This function is called repeatedly by the reshape manager. | |
3854 | * It determines how much progress can safely be made and allows | |
3855 | * that progress. | |
3856 | * - 'info' identifies the array and particularly records in | |
3857 | * ->reshape_progress the metadata's knowledge of progress | |
3858 | * This is a sector offset from the start of the array | |
3859 | * of the next array block to be relocated. This number | |
3860 | * may increase from 0 or decrease from array_size, depending | |
3861 | * on the type of reshape that is happening. | |
3862 | * Note that in contrast, 'sync_completed' is a block count of the | |
3863 | * reshape so far. It gives the distance between the start point | |
3864 | * (head or tail of device) and the next place that data will be | |
3865 | * written. It always increases. | |
3866 | * - 'reshape' is the structure created by analyse_change | |
3867 | * - 'backup_point' shows how much the metadata manager has backed-up | |
3868 | * data. For reshapes with increasing progress, it is the next address | |
3869 | * to be backed up, previous addresses have been backed-up. For | |
3870 | * decreasing progress, it is the earliest address that has been | |
3871 | * backed up - later address are also backed up. | |
3872 | * So addresses between reshape_progress and backup_point are | |
3873 | * backed up providing those are in the 'correct' order. | |
3874 | * - 'wait_point' is an array address. When reshape_completed | |
3875 | * passes this point, progress_reshape should return. It might | |
3876 | * return earlier if it determines that ->reshape_progress needs | |
3877 | * to be updated or further backup is needed. | |
3878 | * - suspend_point is maintained by progress_reshape and the caller | |
3879 | * should not touch it except to initialise to zero. | |
3880 | * It is an array address and it only increases in 2.6.37 and earlier. | |
b6b95155 | 3881 | * This makes it difficult to handle reducing reshapes with |
7443ee81 N |
3882 | * external metadata. |
3883 | * However: it is similar to backup_point in that it records the | |
3884 | * other end of a suspended region from reshape_progress. | |
3885 | * it is moved to extend the region that is safe to backup and/or | |
3886 | * reshape | |
3887 | * - reshape_completed is read from sysfs and returned. The caller | |
3888 | * should copy this into ->reshape_progress when it has reason to | |
3889 | * believe that the metadata knows this, and any backup outside this | |
3890 | * has been erased. | |
3891 | * | |
3892 | * Return value is: | |
3893 | * 1 if more data from backup_point - but only as far as suspend_point, | |
3894 | * should be backed up | |
3895 | * 0 if things are progressing smoothly | |
9e034f70 N |
3896 | * -1 if the reshape is finished because it is all done, |
3897 | * -2 if the reshape is finished due to an error. | |
7443ee81 N |
3898 | */ |
3899 | ||
3900 | int advancing = (reshape->after.data_disks | |
3901 | >= reshape->before.data_disks); | |
38dad34a N |
3902 | unsigned long long need_backup; /* All data between start of array and |
3903 | * here will at some point need to | |
3904 | * be backed up. | |
d0ab945e | 3905 | */ |
7443ee81 | 3906 | unsigned long long read_offset, write_offset; |
b4f8e38b | 3907 | unsigned long long write_range; |
7443ee81 | 3908 | unsigned long long max_progress, target, completed; |
d0ab945e N |
3909 | unsigned long long array_size = (info->component_size |
3910 | * reshape->before.data_disks); | |
7443ee81 | 3911 | int fd; |
77a73a17 | 3912 | char buf[20]; |
7443ee81 N |
3913 | |
3914 | /* First, we unsuspend any region that is now known to be safe. | |
3915 | * If suspend_point is on the 'wrong' side of reshape_progress, then | |
3916 | * we don't have or need suspension at the moment. This is true for | |
3917 | * native metadata when we don't need to back-up. | |
3918 | */ | |
3919 | if (advancing) { | |
49cd738b | 3920 | if (info->reshape_progress <= *suspend_point) |
7443ee81 N |
3921 | sysfs_set_num(info, NULL, "suspend_lo", |
3922 | info->reshape_progress); | |
3923 | } else { | |
3924 | /* Note: this won't work in 2.6.37 and before. | |
3925 | * Something somewhere should make sure we don't need it! | |
3926 | */ | |
49cd738b | 3927 | if (info->reshape_progress >= *suspend_point) |
7443ee81 N |
3928 | sysfs_set_num(info, NULL, "suspend_hi", |
3929 | info->reshape_progress); | |
3930 | } | |
3931 | ||
3932 | /* Now work out how far it is safe to progress. | |
3933 | * If the read_offset for ->reshape_progress is less than | |
3934 | * 'blocks' beyond the write_offset, we can only progress as far | |
3935 | * as a backup. | |
3936 | * Otherwise we can progress until the write_offset for the new location | |
3937 | * reaches (within 'blocks' of) the read_offset at the current location. | |
3938 | * However that region must be suspended unless we are using native | |
3939 | * metadata. | |
3940 | * If we need to suspend more, we limit it to 128M per device, which is | |
3941 | * rather arbitrary and should be some time-based calculation. | |
3942 | */ | |
ec757320 N |
3943 | read_offset = info->reshape_progress / reshape->before.data_disks; |
3944 | write_offset = info->reshape_progress / reshape->after.data_disks; | |
b4f8e38b | 3945 | write_range = info->new_chunk/512; |
38dad34a N |
3946 | if (reshape->before.data_disks == reshape->after.data_disks) |
3947 | need_backup = array_size; | |
3948 | else | |
3949 | need_backup = reshape->backup_blocks; | |
7443ee81 | 3950 | if (advancing) { |
38dad34a | 3951 | if (read_offset < write_offset + write_range) |
7443ee81 | 3952 | max_progress = backup_point; |
ddee071d | 3953 | else |
7443ee81 | 3954 | max_progress = |
2f3dd5e4 N |
3955 | read_offset * |
3956 | reshape->after.data_disks; | |
7443ee81 | 3957 | } else { |
38dad34a N |
3958 | if (read_offset > write_offset - write_range) |
3959 | /* Can only progress as far as has been backed up, | |
3960 | * which must be suspended */ | |
7443ee81 | 3961 | max_progress = backup_point; |
38dad34a N |
3962 | else if (info->reshape_progress <= need_backup) |
3963 | max_progress = backup_point; | |
3964 | else { | |
3965 | if (info->array.major_version >= 0) | |
3966 | /* Can progress until backup is needed */ | |
3967 | max_progress = need_backup; | |
3968 | else { | |
3969 | /* Can progress until metadata update is required */ | |
3970 | max_progress = | |
3971 | read_offset * | |
3972 | reshape->after.data_disks; | |
3973 | /* but data must be suspended */ | |
3974 | if (max_progress < *suspend_point) | |
3975 | max_progress = *suspend_point; | |
3976 | } | |
7443ee81 N |
3977 | } |
3978 | } | |
3979 | ||
3980 | /* We know it is safe to progress to 'max_progress' providing | |
3981 | * it is suspended or we are using native metadata. | |
3982 | * Consider extending suspend_point 128M per device if it | |
3983 | * is less than 64M per device beyond reshape_progress. | |
3984 | * But always do a multiple of 'blocks' | |
832b2b9a N |
3985 | * FIXME this is too big - it takes to long to complete |
3986 | * this much. | |
7443ee81 N |
3987 | */ |
3988 | target = 64*1024*2 * min(reshape->before.data_disks, | |
24daa16f | 3989 | reshape->after.data_disks); |
b4f8e38b | 3990 | target /= reshape->backup_blocks; |
7443ee81 N |
3991 | if (target < 2) |
3992 | target = 2; | |
b4f8e38b | 3993 | target *= reshape->backup_blocks; |
7443ee81 N |
3994 | |
3995 | /* For externally managed metadata we always need to suspend IO to | |
3996 | * the area being reshaped so we regularly push suspend_point forward. | |
3997 | * For native metadata we only need the suspend if we are going to do | |
3998 | * a backup. | |
3999 | */ | |
4000 | if (advancing) { | |
d0ab945e N |
4001 | if ((need_backup > info->reshape_progress |
4002 | || info->array.major_version < 0) && | |
7443ee81 | 4003 | *suspend_point < info->reshape_progress + target) { |
d0ab945e N |
4004 | if (need_backup < *suspend_point + 2 * target) |
4005 | *suspend_point = need_backup; | |
4006 | else if (*suspend_point + 2 * target < array_size) | |
7443ee81 | 4007 | *suspend_point += 2 * target; |
d0ab945e N |
4008 | else |
4009 | *suspend_point = array_size; | |
7443ee81 | 4010 | sysfs_set_num(info, NULL, "suspend_hi", *suspend_point); |
d0ab945e N |
4011 | if (max_progress > *suspend_point) |
4012 | max_progress = *suspend_point; | |
7443ee81 N |
4013 | } |
4014 | } else { | |
38dad34a N |
4015 | if (info->array.major_version >= 0) { |
4016 | /* Only need to suspend when about to backup */ | |
4017 | if (info->reshape_progress < need_backup * 2 && | |
4018 | *suspend_point > 0) { | |
d0ab945e | 4019 | *suspend_point = 0; |
38dad34a N |
4020 | sysfs_set_num(info, NULL, "suspend_lo", 0); |
4021 | sysfs_set_num(info, NULL, "suspend_hi", need_backup); | |
4022 | } | |
4023 | } else { | |
4024 | /* Need to suspend continually */ | |
4025 | if (info->reshape_progress < *suspend_point) | |
4026 | *suspend_point = info->reshape_progress; | |
4027 | if (*suspend_point + target < info->reshape_progress) | |
4028 | /* No need to move suspend region yet */; | |
4029 | else { | |
4030 | if (*suspend_point >= 2 * target) | |
4031 | *suspend_point -= 2 * target; | |
4032 | else | |
4033 | *suspend_point = 0; | |
4034 | sysfs_set_num(info, NULL, "suspend_lo", | |
4035 | *suspend_point); | |
4036 | } | |
d0ab945e N |
4037 | if (max_progress < *suspend_point) |
4038 | max_progress = *suspend_point; | |
7443ee81 N |
4039 | } |
4040 | } | |
4041 | ||
4042 | /* now set sync_max to allow that progress. sync_max, like | |
4043 | * sync_completed is a count of sectors written per device, so | |
4044 | * we find the difference between max_progress and the start point, | |
4045 | * and divide that by after.data_disks to get a sync_max | |
4046 | * number. | |
4047 | * At the same time we convert wait_point to a similar number | |
4048 | * for comparing against sync_completed. | |
4049 | */ | |
92d1991f | 4050 | /* scale down max_progress to per_disk */ |
7443ee81 | 4051 | max_progress /= reshape->after.data_disks; |
92d1991f N |
4052 | /* Round to chunk size as some kernels give an erroneously high number */ |
4053 | max_progress /= info->new_chunk/512; | |
4054 | max_progress *= info->new_chunk/512; | |
7f913e9b N |
4055 | /* And round to old chunk size as the kernel wants that */ |
4056 | max_progress /= info->array.chunk_size/512; | |
4057 | max_progress *= info->array.chunk_size/512; | |
92d1991f N |
4058 | /* Limit progress to the whole device */ |
4059 | if (max_progress > info->component_size) | |
4060 | max_progress = info->component_size; | |
7443ee81 | 4061 | wait_point /= reshape->after.data_disks; |
92d1991f N |
4062 | if (!advancing) { |
4063 | /* switch from 'device offset' to 'processed block count' */ | |
4064 | max_progress = info->component_size - max_progress; | |
4065 | wait_point = info->component_size - wait_point; | |
4066 | } | |
7443ee81 | 4067 | |
a6b2d86c N |
4068 | if (!*frozen) |
4069 | sysfs_set_num(info, NULL, "sync_max", max_progress); | |
7443ee81 N |
4070 | |
4071 | /* Now wait. If we have already reached the point that we were | |
4072 | * asked to wait to, don't wait at all, else wait for any change. | |
4073 | * We need to select on 'sync_completed' as that is the place that | |
4074 | * notifications happen, but we are really interested in | |
4075 | * 'reshape_position' | |
4076 | */ | |
4077 | fd = sysfs_get_fd(info, NULL, "sync_completed"); | |
4078 | if (fd < 0) | |
77a73a17 | 4079 | goto check_progress; |
7443ee81 | 4080 | |
621ea11b | 4081 | if (sysfs_fd_get_ll(fd, &completed) < 0) |
77a73a17 | 4082 | goto check_progress; |
621ea11b | 4083 | |
7443ee81 N |
4084 | while (completed < max_progress && completed < wait_point) { |
4085 | /* Check that sync_action is still 'reshape' to avoid | |
4086 | * waiting forever on a dead array | |
4087 | */ | |
4088 | char action[20]; | |
7443ee81 N |
4089 | if (sysfs_get_str(info, NULL, "sync_action", |
4090 | action, 20) <= 0 || | |
4091 | strncmp(action, "reshape", 7) != 0) | |
4092 | break; | |
26d6e157 AK |
4093 | /* Some kernels reset 'sync_completed' to zero |
4094 | * before setting 'sync_action' to 'idle'. | |
4095 | * So we need these extra tests. | |
4096 | */ | |
4097 | if (completed == 0 && advancing | |
3ee556f8 | 4098 | && strncmp(action, "idle", 4) == 0 |
26d6e157 AK |
4099 | && info->reshape_progress > 0) |
4100 | break; | |
4101 | if (completed == 0 && !advancing | |
3ee556f8 | 4102 | && strncmp(action, "idle", 4) == 0 |
26d6e157 AK |
4103 | && info->reshape_progress < (info->component_size |
4104 | * reshape->after.data_disks)) | |
4105 | break; | |
efc67e8e | 4106 | sysfs_wait(fd, NULL); |
621ea11b | 4107 | if (sysfs_fd_get_ll(fd, &completed) < 0) |
77a73a17 | 4108 | goto check_progress; |
7443ee81 | 4109 | } |
10d0d365 | 4110 | /* Some kernels reset 'sync_completed' to zero, |
e0184a0c | 4111 | * we need to have real point we are in md. |
e0cc1c8d | 4112 | * So in that case, read 'reshape_position' from sysfs. |
10d0d365 | 4113 | */ |
e0184a0c | 4114 | if (completed == 0) { |
e0cc1c8d | 4115 | unsigned long long reshapep; |
e0184a0c N |
4116 | char action[20]; |
4117 | if (sysfs_get_str(info, NULL, "sync_action", | |
4118 | action, 20) > 0 && | |
e0cc1c8d N |
4119 | strncmp(action, "idle", 4) == 0 && |
4120 | sysfs_get_ll(info, NULL, | |
4121 | "reshape_position", &reshapep) == 0) | |
4122 | *reshape_completed = reshapep; | |
4123 | } else { | |
4124 | /* some kernels can give an incorrectly high | |
4125 | * 'completed' number, so round down */ | |
4126 | completed /= (info->new_chunk/512); | |
4127 | completed *= (info->new_chunk/512); | |
4128 | /* Convert 'completed' back in to a 'progress' number */ | |
4129 | completed *= reshape->after.data_disks; | |
4130 | if (!advancing) | |
4131 | completed = (info->component_size | |
4132 | * reshape->after.data_disks | |
4133 | - completed); | |
4134 | *reshape_completed = completed; | |
7443ee81 | 4135 | } |
24daa16f | 4136 | |
7443ee81 N |
4137 | close(fd); |
4138 | ||
4139 | /* We return the need_backup flag. Caller will decide | |
d0ab945e | 4140 | * how much - a multiple of ->backup_blocks up to *suspend_point |
7443ee81 | 4141 | */ |
38dad34a N |
4142 | if (advancing) |
4143 | return need_backup > info->reshape_progress; | |
4144 | else | |
4145 | return need_backup >= info->reshape_progress; | |
77a73a17 N |
4146 | |
4147 | check_progress: | |
4148 | /* if we couldn't read a number from sync_completed, then | |
4149 | * either the reshape did complete, or it aborted. | |
4150 | * We can tell which by checking for 'none' in reshape_position. | |
621ea11b N |
4151 | * If it did abort, then it might immediately restart if it |
4152 | * it was just a device failure that leaves us degraded but | |
4153 | * functioning. | |
77a73a17 | 4154 | */ |
77a73a17 | 4155 | if (sysfs_get_str(info, NULL, "reshape_position", buf, sizeof(buf)) < 0 |
621ea11b N |
4156 | || strncmp(buf, "none", 4) != 0) { |
4157 | /* The abort might only be temporary. Wait up to 10 | |
4158 | * seconds for fd to contain a valid number again. | |
4159 | */ | |
efc67e8e | 4160 | int wait = 10000; |
621ea11b | 4161 | int rv = -2; |
a6b2d86c | 4162 | unsigned long long new_sync_max; |
efc67e8e N |
4163 | while (fd >= 0 && rv < 0 && wait > 0) { |
4164 | if (sysfs_wait(fd, &wait) != 1) | |
621ea11b | 4165 | break; |
6560987b N |
4166 | switch (sysfs_fd_get_ll(fd, &completed)) { |
4167 | case 0: | |
621ea11b N |
4168 | /* all good again */ |
4169 | rv = 1; | |
a6b2d86c N |
4170 | /* If "sync_max" is no longer max_progress |
4171 | * we need to freeze things | |
4172 | */ | |
4173 | sysfs_get_ll(info, NULL, "sync_max", &new_sync_max); | |
4174 | *frozen = (new_sync_max != max_progress); | |
6560987b N |
4175 | break; |
4176 | case -2: /* read error - abort */ | |
efc67e8e | 4177 | wait = 0; |
6560987b N |
4178 | break; |
4179 | } | |
621ea11b N |
4180 | } |
4181 | if (fd >= 0) | |
4182 | close(fd); | |
4183 | return rv; /* abort */ | |
4184 | } else { | |
6d5316f6 | 4185 | /* Maybe racing with array shutdown - check state */ |
621ea11b N |
4186 | if (fd >= 0) |
4187 | close(fd); | |
6d5316f6 N |
4188 | if (sysfs_get_str(info, NULL, "array_state", buf, sizeof(buf)) < 0 |
4189 | || strncmp(buf, "inactive", 8) == 0 | |
4190 | || strncmp(buf, "clear",5) == 0) | |
4191 | return -2; /* abort */ | |
77a73a17 | 4192 | return -1; /* complete */ |
6d5316f6 | 4193 | } |
7443ee81 N |
4194 | } |
4195 | ||
fcf57625 | 4196 | /* FIXME return status is never checked */ |
4411fb17 | 4197 | static int grow_backup(struct mdinfo *sra, |
7236ee7a | 4198 | unsigned long long offset, /* per device */ |
7443ee81 | 4199 | unsigned long stripes, /* per device, in old chunks */ |
7236ee7a N |
4200 | int *sources, unsigned long long *offsets, |
4201 | int disks, int chunk, int level, int layout, | |
4202 | int dests, int *destfd, unsigned long long *destoffsets, | |
d4445387 | 4203 | int part, int *degraded, |
7236ee7a N |
4204 | char *buf) |
4205 | { | |
4206 | /* Backup 'blocks' sectors at 'offset' on each device of the array, | |
4207 | * to storage 'destfd' (offset 'destoffsets'), after first | |
4208 | * suspending IO. Then allow resync to continue | |
4209 | * over the suspended section. | |
4210 | * Use part 'part' of the backup-super-block. | |
4211 | */ | |
4212 | int odata = disks; | |
4213 | int rv = 0; | |
4214 | int i; | |
f21e18ca N |
4215 | unsigned long long ll; |
4216 | int new_degraded; | |
7236ee7a N |
4217 | //printf("offset %llu\n", offset); |
4218 | if (level >= 4) | |
4219 | odata--; | |
4220 | if (level == 6) | |
4221 | odata--; | |
7443ee81 | 4222 | |
d4445387 | 4223 | /* Check that array hasn't become degraded, else we might backup the wrong data */ |
2c6ac128 N |
4224 | if (sysfs_get_ll(sra, NULL, "degraded", &ll) < 0) |
4225 | return -1; /* FIXME this error is ignored */ | |
f21e18ca | 4226 | new_degraded = (int)ll; |
d4445387 N |
4227 | if (new_degraded != *degraded) { |
4228 | /* check each device to ensure it is still working */ | |
4229 | struct mdinfo *sd; | |
4230 | for (sd = sra->devs ; sd ; sd = sd->next) { | |
4231 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
4232 | continue; | |
4233 | if (sd->disk.state & (1<<MD_DISK_SYNC)) { | |
cf52eff5 TM |
4234 | char sbuf[100]; |
4235 | ||
4236 | if (sysfs_get_str(sra, sd, "state", | |
4237 | sbuf, sizeof(sbuf)) < 0 || | |
d4445387 N |
4238 | strstr(sbuf, "faulty") || |
4239 | strstr(sbuf, "in_sync") == NULL) { | |
4240 | /* this device is dead */ | |
4241 | sd->disk.state = (1<<MD_DISK_FAULTY); | |
4242 | if (sd->disk.raid_disk >= 0 && | |
4243 | sources[sd->disk.raid_disk] >= 0) { | |
4244 | close(sources[sd->disk.raid_disk]); | |
4245 | sources[sd->disk.raid_disk] = -1; | |
4246 | } | |
4247 | } | |
4248 | } | |
4249 | } | |
4250 | *degraded = new_degraded; | |
4251 | } | |
7236ee7a N |
4252 | if (part) { |
4253 | bsb.arraystart2 = __cpu_to_le64(offset * odata); | |
200871ad | 4254 | bsb.length2 = __cpu_to_le64(stripes * (chunk/512) * odata); |
7236ee7a N |
4255 | } else { |
4256 | bsb.arraystart = __cpu_to_le64(offset * odata); | |
200871ad | 4257 | bsb.length = __cpu_to_le64(stripes * (chunk/512) * odata); |
7236ee7a N |
4258 | } |
4259 | if (part) | |
4260 | bsb.magic[15] = '2'; | |
4261 | for (i = 0; i < dests; i++) | |
4262 | if (part) | |
4263 | lseek64(destfd[i], destoffsets[i] + __le64_to_cpu(bsb.devstart2)*512, 0); | |
4264 | else | |
4265 | lseek64(destfd[i], destoffsets[i], 0); | |
4266 | ||
24daa16f | 4267 | rv = save_stripes(sources, offsets, |
7236ee7a N |
4268 | disks, chunk, level, layout, |
4269 | dests, destfd, | |
4270 | offset*512*odata, stripes * chunk * odata, | |
4271 | buf); | |
4272 | ||
4273 | if (rv) | |
4274 | return rv; | |
97396422 | 4275 | bsb.mtime = __cpu_to_le64(time(0)); |
7236ee7a N |
4276 | for (i = 0; i < dests; i++) { |
4277 | bsb.devstart = __cpu_to_le64(destoffsets[i]/512); | |
4278 | ||
4279 | bsb.sb_csum = bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb)); | |
4280 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0) | |
4281 | bsb.sb_csum2 = bsb_csum((char*)&bsb, | |
4282 | ((char*)&bsb.sb_csum2)-((char*)&bsb)); | |
4283 | ||
72044953 | 4284 | rv = -1; |
f21e18ca N |
4285 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i] - 4096, 0) |
4286 | != destoffsets[i] - 4096) | |
72044953 N |
4287 | break; |
4288 | if (write(destfd[i], &bsb, 512) != 512) | |
4289 | break; | |
ff94fb86 | 4290 | if (destoffsets[i] > 4096) { |
f21e18ca | 4291 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i]+stripes*chunk*odata, 0) != |
a847575a | 4292 | destoffsets[i]+stripes*chunk*odata) |
72044953 N |
4293 | break; |
4294 | if (write(destfd[i], &bsb, 512) != 512) | |
4295 | break; | |
ff94fb86 | 4296 | } |
7236ee7a | 4297 | fsync(destfd[i]); |
72044953 | 4298 | rv = 0; |
7236ee7a | 4299 | } |
2efedc7b | 4300 | |
fcf57625 | 4301 | return rv; |
7236ee7a N |
4302 | } |
4303 | ||
4304 | /* in 2.6.30, the value reported by sync_completed can be | |
4305 | * less that it should be by one stripe. | |
4306 | * This only happens when reshape hits sync_max and pauses. | |
4307 | * So allow wait_backup to either extent sync_max further | |
4308 | * than strictly necessary, or return before the | |
4309 | * sync has got quite as far as we would really like. | |
4310 | * This is what 'blocks2' is for. | |
4311 | * The various caller give appropriate values so that | |
4312 | * every works. | |
4313 | */ | |
fcf57625 | 4314 | /* FIXME return value is often ignored */ |
24daa16f N |
4315 | static int forget_backup(int dests, int *destfd, |
4316 | unsigned long long *destoffsets, | |
4317 | int part) | |
7236ee7a | 4318 | { |
24daa16f | 4319 | /* |
7443ee81 | 4320 | * Erase backup 'part' (which is 0 or 1) |
7236ee7a | 4321 | */ |
7236ee7a | 4322 | int i; |
fcf57625 | 4323 | int rv; |
7236ee7a | 4324 | |
7236ee7a N |
4325 | if (part) { |
4326 | bsb.arraystart2 = __cpu_to_le64(0); | |
4327 | bsb.length2 = __cpu_to_le64(0); | |
4328 | } else { | |
4329 | bsb.arraystart = __cpu_to_le64(0); | |
4330 | bsb.length = __cpu_to_le64(0); | |
4331 | } | |
97396422 | 4332 | bsb.mtime = __cpu_to_le64(time(0)); |
fcf57625 | 4333 | rv = 0; |
7236ee7a N |
4334 | for (i = 0; i < dests; i++) { |
4335 | bsb.devstart = __cpu_to_le64(destoffsets[i]/512); | |
4336 | bsb.sb_csum = bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb)); | |
4337 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0) | |
4338 | bsb.sb_csum2 = bsb_csum((char*)&bsb, | |
4339 | ((char*)&bsb.sb_csum2)-((char*)&bsb)); | |
f21e18ca | 4340 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i]-4096, 0) != |
a847575a | 4341 | destoffsets[i]-4096) |
72044953 | 4342 | rv = -1; |
24daa16f | 4343 | if (rv == 0 && |
72044953 N |
4344 | write(destfd[i], &bsb, 512) != 512) |
4345 | rv = -1; | |
7236ee7a N |
4346 | fsync(destfd[i]); |
4347 | } | |
fcf57625 | 4348 | return rv; |
7236ee7a | 4349 | } |
e86c9dd6 | 4350 | |
7236ee7a N |
4351 | static void fail(char *msg) |
4352 | { | |
fcf57625 | 4353 | int rv; |
72044953 N |
4354 | rv = (write(2, msg, strlen(msg)) != (int)strlen(msg)); |
4355 | rv |= (write(2, "\n", 1) != 1); | |
fcf57625 | 4356 | exit(rv ? 1 : 2); |
7236ee7a N |
4357 | } |
4358 | ||
4359 | static char *abuf, *bbuf; | |
f21e18ca | 4360 | static unsigned long long abuflen; |
7236ee7a N |
4361 | static void validate(int afd, int bfd, unsigned long long offset) |
4362 | { | |
4363 | /* check that the data in the backup against the array. | |
4364 | * This is only used for regression testing and should not | |
4365 | * be used while the array is active | |
4366 | */ | |
7236ee7a N |
4367 | if (afd < 0) |
4368 | return; | |
4369 | lseek64(bfd, offset - 4096, 0); | |
4370 | if (read(bfd, &bsb2, 512) != 512) | |
4371 | fail("cannot read bsb"); | |
4372 | if (bsb2.sb_csum != bsb_csum((char*)&bsb2, | |
4373 | ((char*)&bsb2.sb_csum)-((char*)&bsb2))) | |
4374 | fail("first csum bad"); | |
4375 | if (memcmp(bsb2.magic, "md_backup_data", 14) != 0) | |
4376 | fail("magic is bad"); | |
4377 | if (memcmp(bsb2.magic, "md_backup_data-2", 16) == 0 && | |
4378 | bsb2.sb_csum2 != bsb_csum((char*)&bsb2, | |
24daa16f | 4379 | ((char*)&bsb2.sb_csum2)-((char*)&bsb2))) |
7236ee7a N |
4380 | fail("second csum bad"); |
4381 | ||
4382 | if (__le64_to_cpu(bsb2.devstart)*512 != offset) | |
4383 | fail("devstart is wrong"); | |
4384 | ||
4385 | if (bsb2.length) { | |
4386 | unsigned long long len = __le64_to_cpu(bsb2.length)*512; | |
4387 | ||
4388 | if (abuflen < len) { | |
4389 | free(abuf); | |
4390 | free(bbuf); | |
4391 | abuflen = len; | |
fcf57625 N |
4392 | if (posix_memalign((void**)&abuf, 4096, abuflen) || |
4393 | posix_memalign((void**)&bbuf, 4096, abuflen)) { | |
4394 | abuflen = 0; | |
4395 | /* just stop validating on mem-alloc failure */ | |
4396 | return; | |
4397 | } | |
e86c9dd6 | 4398 | } |
48924014 | 4399 | |
7236ee7a | 4400 | lseek64(bfd, offset, 0); |
f21e18ca | 4401 | if ((unsigned long long)read(bfd, bbuf, len) != len) { |
080fd005 | 4402 | //printf("len %llu\n", len); |
7236ee7a N |
4403 | fail("read first backup failed"); |
4404 | } | |
4405 | lseek64(afd, __le64_to_cpu(bsb2.arraystart)*512, 0); | |
f21e18ca | 4406 | if ((unsigned long long)read(afd, abuf, len) != len) |
7236ee7a N |
4407 | fail("read first from array failed"); |
4408 | if (memcmp(bbuf, abuf, len) != 0) { | |
24daa16f | 4409 | #if 0 |
7236ee7a N |
4410 | int i; |
4411 | printf("offset=%llu len=%llu\n", | |
080fd005 | 4412 | (unsigned long long)__le64_to_cpu(bsb2.arraystart)*512, len); |
7236ee7a N |
4413 | for (i=0; i<len; i++) |
4414 | if (bbuf[i] != abuf[i]) { | |
4415 | printf("first diff byte %d\n", i); | |
93ecfa01 | 4416 | break; |
7236ee7a | 4417 | } |
24daa16f | 4418 | #endif |
7236ee7a | 4419 | fail("data1 compare failed"); |
e86c9dd6 | 4420 | } |
7236ee7a N |
4421 | } |
4422 | if (bsb2.length2) { | |
4423 | unsigned long long len = __le64_to_cpu(bsb2.length2)*512; | |
4424 | ||
4425 | if (abuflen < len) { | |
4426 | free(abuf); | |
4427 | free(bbuf); | |
4428 | abuflen = len; | |
503975b9 N |
4429 | abuf = xmalloc(abuflen); |
4430 | bbuf = xmalloc(abuflen); | |
e86c9dd6 NB |
4431 | } |
4432 | ||
7236ee7a | 4433 | lseek64(bfd, offset+__le64_to_cpu(bsb2.devstart2)*512, 0); |
f21e18ca | 4434 | if ((unsigned long long)read(bfd, bbuf, len) != len) |
7236ee7a N |
4435 | fail("read second backup failed"); |
4436 | lseek64(afd, __le64_to_cpu(bsb2.arraystart2)*512, 0); | |
f21e18ca | 4437 | if ((unsigned long long)read(afd, abuf, len) != len) |
7236ee7a N |
4438 | fail("read second from array failed"); |
4439 | if (memcmp(bbuf, abuf, len) != 0) | |
4440 | fail("data2 compare failed"); | |
e86c9dd6 | 4441 | } |
7236ee7a | 4442 | } |
e86c9dd6 | 4443 | |
999b4972 N |
4444 | int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, |
4445 | struct supertype *st, unsigned long blocks, | |
4446 | int *fds, unsigned long long *offsets, | |
4447 | int dests, int *destfd, unsigned long long *destoffsets) | |
7236ee7a | 4448 | { |
7443ee81 N |
4449 | /* Monitor a reshape where backup is being performed using |
4450 | * 'native' mechanism - either to a backup file, or | |
4451 | * to some space in a spare. | |
4452 | */ | |
7236ee7a | 4453 | char *buf; |
7443ee81 N |
4454 | int degraded = -1; |
4455 | unsigned long long speed; | |
4456 | unsigned long long suspend_point, array_size; | |
4457 | unsigned long long backup_point, wait_point; | |
4458 | unsigned long long reshape_completed; | |
4459 | int done = 0; | |
4460 | int increasing = reshape->after.data_disks >= reshape->before.data_disks; | |
4461 | int part = 0; /* The next part of the backup area to fill. It may already | |
4462 | * be full, so we need to check */ | |
4463 | int level = reshape->level; | |
4464 | int layout = reshape->before.layout; | |
4465 | int data = reshape->before.data_disks; | |
4466 | int disks = reshape->before.data_disks + reshape->parity; | |
4467 | int chunk = sra->array.chunk_size; | |
da8100ca N |
4468 | struct mdinfo *sd; |
4469 | unsigned long stripes; | |
3b7e9d0c | 4470 | int uuid[4]; |
a6b2d86c | 4471 | int frozen = 0; |
da8100ca N |
4472 | |
4473 | /* set up the backup-super-block. This requires the | |
4474 | * uuid from the array. | |
4475 | */ | |
4476 | /* Find a superblock */ | |
4477 | for (sd = sra->devs; sd; sd = sd->next) { | |
4478 | char *dn; | |
4479 | int devfd; | |
4480 | int ok; | |
4481 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
4482 | continue; | |
4483 | dn = map_dev(sd->disk.major, sd->disk.minor, 1); | |
4484 | devfd = dev_open(dn, O_RDONLY); | |
4485 | if (devfd < 0) | |
4486 | continue; | |
4487 | ok = st->ss->load_super(st, devfd, NULL); | |
4488 | close(devfd); | |
77f8d358 | 4489 | if (ok == 0) |
da8100ca N |
4490 | break; |
4491 | } | |
4492 | if (!sd) { | |
e7b84f9d | 4493 | pr_err("Cannot find a superblock\n"); |
da8100ca N |
4494 | return 0; |
4495 | } | |
4496 | ||
4497 | memset(&bsb, 0, 512); | |
4498 | memcpy(bsb.magic, "md_backup_data-1", 16); | |
3b7e9d0c LB |
4499 | st->ss->uuid_from_super(st, uuid); |
4500 | memcpy(bsb.set_uuid, uuid, 16); | |
da8100ca N |
4501 | bsb.mtime = __cpu_to_le64(time(0)); |
4502 | bsb.devstart2 = blocks; | |
4503 | ||
4504 | stripes = blocks / (sra->array.chunk_size/512) / | |
4505 | reshape->before.data_disks; | |
e86c9dd6 | 4506 | |
fcf57625 N |
4507 | if (posix_memalign((void**)&buf, 4096, disks * chunk)) |
4508 | /* Don't start the 'reshape' */ | |
4509 | return 0; | |
7443ee81 N |
4510 | if (reshape->before.data_disks == reshape->after.data_disks) { |
4511 | sysfs_get_ll(sra, NULL, "sync_speed_min", &speed); | |
4512 | sysfs_set_num(sra, NULL, "sync_speed_min", 200000); | |
4513 | } | |
e86c9dd6 | 4514 | |
7443ee81 | 4515 | if (increasing) { |
96533072 | 4516 | array_size = sra->component_size * reshape->after.data_disks; |
7443ee81 N |
4517 | backup_point = sra->reshape_progress; |
4518 | suspend_point = 0; | |
4519 | } else { | |
96533072 | 4520 | array_size = sra->component_size * reshape->before.data_disks; |
25da62d9 | 4521 | backup_point = reshape->backup_blocks; |
7443ee81 N |
4522 | suspend_point = array_size; |
4523 | } | |
7236ee7a | 4524 | |
7443ee81 N |
4525 | while (!done) { |
4526 | int rv; | |
7236ee7a | 4527 | |
7443ee81 N |
4528 | /* Want to return as soon the oldest backup slot can |
4529 | * be released as that allows us to start backing up | |
4530 | * some more, providing suspend_point has been | |
b6b95155 | 4531 | * advanced, which it should have. |
7443ee81 N |
4532 | */ |
4533 | if (increasing) { | |
4534 | wait_point = array_size; | |
4535 | if (part == 0 && __le64_to_cpu(bsb.length) > 0) | |
4536 | wait_point = (__le64_to_cpu(bsb.arraystart) + | |
4537 | __le64_to_cpu(bsb.length)); | |
4538 | if (part == 1 && __le64_to_cpu(bsb.length2) > 0) | |
4539 | wait_point = (__le64_to_cpu(bsb.arraystart2) + | |
4540 | __le64_to_cpu(bsb.length2)); | |
4541 | } else { | |
4542 | wait_point = 0; | |
4543 | if (part == 0 && __le64_to_cpu(bsb.length) > 0) | |
4544 | wait_point = __le64_to_cpu(bsb.arraystart); | |
4545 | if (part == 1 && __le64_to_cpu(bsb.length2) > 0) | |
4546 | wait_point = __le64_to_cpu(bsb.arraystart2); | |
4547 | } | |
4548 | ||
737f8574 | 4549 | reshape_completed = sra->reshape_progress; |
7443ee81 N |
4550 | rv = progress_reshape(sra, reshape, |
4551 | backup_point, wait_point, | |
a6b2d86c N |
4552 | &suspend_point, &reshape_completed, |
4553 | &frozen); | |
7443ee81 N |
4554 | /* external metadata would need to ping_monitor here */ |
4555 | sra->reshape_progress = reshape_completed; | |
7236ee7a | 4556 | |
7443ee81 N |
4557 | /* Clear any backup region that is before 'here' */ |
4558 | if (increasing) { | |
b3cf095a N |
4559 | if (__le64_to_cpu(bsb.length) > 0 && |
4560 | reshape_completed >= (__le64_to_cpu(bsb.arraystart) + | |
7443ee81 N |
4561 | __le64_to_cpu(bsb.length))) |
4562 | forget_backup(dests, destfd, | |
4563 | destoffsets, 0); | |
b3cf095a N |
4564 | if (__le64_to_cpu(bsb.length2) > 0 && |
4565 | reshape_completed >= (__le64_to_cpu(bsb.arraystart2) + | |
7443ee81 N |
4566 | __le64_to_cpu(bsb.length2))) |
4567 | forget_backup(dests, destfd, | |
4568 | destoffsets, 1); | |
4569 | } else { | |
b3cf095a N |
4570 | if (__le64_to_cpu(bsb.length) > 0 && |
4571 | reshape_completed <= (__le64_to_cpu(bsb.arraystart))) | |
7443ee81 N |
4572 | forget_backup(dests, destfd, |
4573 | destoffsets, 0); | |
b3cf095a N |
4574 | if (__le64_to_cpu(bsb.length2) > 0 && |
4575 | reshape_completed <= (__le64_to_cpu(bsb.arraystart2))) | |
7443ee81 N |
4576 | forget_backup(dests, destfd, |
4577 | destoffsets, 1); | |
4578 | } | |
84d11e6c N |
4579 | if (sigterm) |
4580 | rv = -2; | |
223c5c99 | 4581 | if (rv < 0) { |
77a73a17 N |
4582 | if (rv == -1) |
4583 | done = 1; | |
223c5c99 N |
4584 | break; |
4585 | } | |
2d4de5f9 N |
4586 | if (rv == 0 && increasing && !st->ss->external) { |
4587 | /* No longer need to monitor this reshape */ | |
2cdd5ce0 | 4588 | sysfs_set_str(sra, NULL, "sync_max", "max"); |
2d4de5f9 N |
4589 | done = 1; |
4590 | break; | |
4591 | } | |
223c5c99 | 4592 | |
60204e4e | 4593 | while (rv) { |
7443ee81 | 4594 | unsigned long long offset; |
e97ca002 | 4595 | unsigned long actual_stripes; |
60204e4e N |
4596 | /* Need to backup some data. |
4597 | * If 'part' is not used and the desired | |
4598 | * backup size is suspended, do a backup, | |
4599 | * then consider the next part. | |
4600 | */ | |
7443ee81 N |
4601 | /* Check that 'part' is unused */ |
4602 | if (part == 0 && __le64_to_cpu(bsb.length) != 0) | |
60204e4e | 4603 | break; |
7443ee81 | 4604 | if (part == 1 && __le64_to_cpu(bsb.length2) != 0) |
60204e4e | 4605 | break; |
7443ee81 N |
4606 | |
4607 | offset = backup_point / data; | |
e97ca002 | 4608 | actual_stripes = stripes; |
60204e4e | 4609 | if (increasing) { |
e97ca002 N |
4610 | if (offset + actual_stripes * (chunk/512) > |
4611 | sra->component_size) | |
4612 | actual_stripes = ((sra->component_size - offset) | |
4613 | / (chunk/512)); | |
4614 | if (offset + actual_stripes * (chunk/512) > | |
60204e4e N |
4615 | suspend_point/data) |
4616 | break; | |
4617 | } else { | |
e97ca002 N |
4618 | if (offset < actual_stripes * (chunk/512)) |
4619 | actual_stripes = offset / (chunk/512); | |
4620 | offset -= actual_stripes * (chunk/512); | |
4621 | if (offset < suspend_point/data) | |
60204e4e N |
4622 | break; |
4623 | } | |
e4b11073 N |
4624 | if (actual_stripes == 0) |
4625 | break; | |
e97ca002 | 4626 | grow_backup(sra, offset, actual_stripes, |
7443ee81 N |
4627 | fds, offsets, |
4628 | disks, chunk, level, layout, | |
4629 | dests, destfd, destoffsets, | |
4630 | part, °raded, buf); | |
4631 | validate(afd, destfd[0], destoffsets[0]); | |
4632 | /* record where 'part' is up to */ | |
4633 | part = !part; | |
4634 | if (increasing) | |
e97ca002 | 4635 | backup_point += actual_stripes * (chunk/512) * data; |
7443ee81 | 4636 | else |
e97ca002 | 4637 | backup_point -= actual_stripes * (chunk/512) * data; |
7443ee81 N |
4638 | } |
4639 | } | |
4640 | ||
223c5c99 | 4641 | /* FIXME maybe call progress_reshape one more time instead */ |
5e7be838 N |
4642 | /* remove any remaining suspension */ |
4643 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); | |
4644 | sysfs_set_num(sra, NULL, "suspend_hi", 0); | |
4645 | sysfs_set_num(sra, NULL, "suspend_lo", 0); | |
4646 | sysfs_set_num(sra, NULL, "sync_min", 0); | |
4647 | ||
7443ee81 N |
4648 | if (reshape->before.data_disks == reshape->after.data_disks) |
4649 | sysfs_set_num(sra, NULL, "sync_speed_min", speed); | |
7236ee7a | 4650 | free(buf); |
77a73a17 | 4651 | return done; |
e86c9dd6 | 4652 | } |
353632d9 NB |
4653 | |
4654 | /* | |
4655 | * If any spare contains md_back_data-1 which is recent wrt mtime, | |
4656 | * write that data into the array and update the super blocks with | |
4657 | * the new reshape_progress | |
4658 | */ | |
ea0ebe96 N |
4659 | int Grow_restart(struct supertype *st, struct mdinfo *info, int *fdlist, int cnt, |
4660 | char *backup_file, int verbose) | |
353632d9 NB |
4661 | { |
4662 | int i, j; | |
4663 | int old_disks; | |
353632d9 | 4664 | unsigned long long *offsets; |
82f2d6ab | 4665 | unsigned long long nstripe, ostripe; |
6e9eac4f | 4666 | int ndata, odata; |
353632d9 | 4667 | |
e9e43ec3 N |
4668 | odata = info->array.raid_disks - info->delta_disks - 1; |
4669 | if (info->array.level == 6) odata--; /* number of data disks */ | |
4670 | ndata = info->array.raid_disks - 1; | |
4671 | if (info->new_level == 6) ndata--; | |
353632d9 NB |
4672 | |
4673 | old_disks = info->array.raid_disks - info->delta_disks; | |
4674 | ||
e9e43ec3 N |
4675 | if (info->delta_disks <= 0) |
4676 | /* Didn't grow, so the backup file must have | |
4677 | * been used | |
4678 | */ | |
4679 | old_disks = cnt; | |
06b0d786 | 4680 | for (i=old_disks-(backup_file?1:0); i<cnt; i++) { |
353632d9 | 4681 | struct mdinfo dinfo; |
06b0d786 | 4682 | int fd; |
e9e43ec3 | 4683 | int bsbsize; |
ea0ebe96 | 4684 | char *devname, namebuf[20]; |
10af14c4 | 4685 | unsigned long long lo, hi; |
353632d9 NB |
4686 | |
4687 | /* This was a spare and may have some saved data on it. | |
4688 | * Load the superblock, find and load the | |
4689 | * backup_super_block. | |
4690 | * If either fail, go on to next device. | |
4691 | * If the backup contains no new info, just return | |
206c5eae | 4692 | * else restore data and update all superblocks |
353632d9 | 4693 | */ |
06b0d786 NB |
4694 | if (i == old_disks-1) { |
4695 | fd = open(backup_file, O_RDONLY); | |
e9e43ec3 | 4696 | if (fd<0) { |
e7b84f9d | 4697 | pr_err("backup file %s inaccessible: %s\n", |
e9e43ec3 | 4698 | backup_file, strerror(errno)); |
06b0d786 | 4699 | continue; |
e9e43ec3 | 4700 | } |
ea0ebe96 | 4701 | devname = backup_file; |
06b0d786 NB |
4702 | } else { |
4703 | fd = fdlist[i]; | |
4704 | if (fd < 0) | |
4705 | continue; | |
3da92f27 | 4706 | if (st->ss->load_super(st, fd, NULL)) |
06b0d786 | 4707 | continue; |
353632d9 | 4708 | |
a5d85af7 | 4709 | st->ss->getinfo_super(st, &dinfo, NULL); |
3da92f27 NB |
4710 | st->ss->free_super(st); |
4711 | ||
06b0d786 NB |
4712 | if (lseek64(fd, |
4713 | (dinfo.data_offset + dinfo.component_size - 8) <<9, | |
ea0ebe96 | 4714 | 0) < 0) { |
e7b84f9d | 4715 | pr_err("Cannot seek on device %d\n", i); |
06b0d786 | 4716 | continue; /* Cannot seek */ |
ea0ebe96 N |
4717 | } |
4718 | sprintf(namebuf, "device-%d", i); | |
4719 | devname = namebuf; | |
06b0d786 | 4720 | } |
ea0ebe96 N |
4721 | if (read(fd, &bsb, sizeof(bsb)) != sizeof(bsb)) { |
4722 | if (verbose) | |
e7b84f9d | 4723 | pr_err("Cannot read from %s\n", devname); |
353632d9 | 4724 | continue; /* Cannot read */ |
ea0ebe96 | 4725 | } |
e9e43ec3 | 4726 | if (memcmp(bsb.magic, "md_backup_data-1", 16) != 0 && |
ea0ebe96 N |
4727 | memcmp(bsb.magic, "md_backup_data-2", 16) != 0) { |
4728 | if (verbose) | |
e7b84f9d | 4729 | pr_err("No backup metadata on %s\n", devname); |
353632d9 | 4730 | continue; |
ea0ebe96 N |
4731 | } |
4732 | if (bsb.sb_csum != bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb))) { | |
4733 | if (verbose) | |
e7b84f9d | 4734 | pr_err("Bad backup-metadata checksum on %s\n", devname); |
353632d9 | 4735 | continue; /* bad checksum */ |
ea0ebe96 | 4736 | } |
e9e43ec3 | 4737 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0 && |
ea0ebe96 N |
4738 | bsb.sb_csum2 != bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum2)-((char*)&bsb))) { |
4739 | if (verbose) | |
e7b84f9d | 4740 | pr_err("Bad backup-metadata checksum2 on %s\n", devname); |
22e30516 | 4741 | continue; /* Bad second checksum */ |
ea0ebe96 N |
4742 | } |
4743 | if (memcmp(bsb.set_uuid,info->uuid, 16) != 0) { | |
4744 | if (verbose) | |
e7b84f9d | 4745 | pr_err("Wrong uuid on backup-metadata on %s\n", devname); |
353632d9 | 4746 | continue; /* Wrong uuid */ |
ea0ebe96 | 4747 | } |
353632d9 | 4748 | |
097075b6 N |
4749 | /* array utime and backup-mtime should be updated at much the same time, but it seems that |
4750 | * sometimes they aren't... So allow considerable flexability in matching, and allow | |
4751 | * this test to be overridden by an environment variable. | |
4752 | */ | |
26714713 DD |
4753 | if(time_after(info->array.utime, (unsigned int)__le64_to_cpu(bsb.mtime) + 2*60*60) || |
4754 | time_before(info->array.utime, (unsigned int)__le64_to_cpu(bsb.mtime) - 10*60)) { | |
097075b6 | 4755 | if (check_env("MDADM_GROW_ALLOW_OLD")) { |
7a862a02 | 4756 | pr_err("accepting backup with timestamp %lu for array with timestamp %lu\n", |
097075b6 N |
4757 | (unsigned long)__le64_to_cpu(bsb.mtime), |
4758 | (unsigned long)info->array.utime); | |
4759 | } else { | |
676ab312 N |
4760 | pr_err("too-old timestamp on backup-metadata on %s\n", devname); |
4761 | pr_err("If you think it is should be safe, try 'export MDADM_GROW_ALLOW_OLD=1'\n"); | |
097075b6 N |
4762 | continue; /* time stamp is too bad */ |
4763 | } | |
ea0ebe96 | 4764 | } |
353632d9 | 4765 | |
e9e43ec3 | 4766 | if (bsb.magic[15] == '1') { |
10af14c4 N |
4767 | if (bsb.length == 0) |
4768 | continue; | |
e7a71c6b N |
4769 | if (info->delta_disks >= 0) { |
4770 | /* reshape_progress is increasing */ | |
4771 | if (__le64_to_cpu(bsb.arraystart) | |
4772 | + __le64_to_cpu(bsb.length) | |
4773 | < info->reshape_progress) { | |
4774 | nonew: | |
4775 | if (verbose) | |
e7b84f9d | 4776 | pr_err("backup-metadata found on %s but is not needed\n", devname); |
e7a71c6b N |
4777 | continue; /* No new data here */ |
4778 | } | |
4779 | } else { | |
4780 | /* reshape_progress is decreasing */ | |
4781 | if (__le64_to_cpu(bsb.arraystart) >= | |
4782 | info->reshape_progress) | |
4783 | goto nonew; /* No new data here */ | |
ea0ebe96 | 4784 | } |
e9e43ec3 | 4785 | } else { |
10af14c4 N |
4786 | if (bsb.length == 0 && bsb.length2 == 0) |
4787 | continue; | |
e7a71c6b N |
4788 | if (info->delta_disks >= 0) { |
4789 | /* reshape_progress is increasing */ | |
4790 | if ((__le64_to_cpu(bsb.arraystart) | |
4791 | + __le64_to_cpu(bsb.length) | |
4792 | < info->reshape_progress) | |
4793 | && | |
4794 | (__le64_to_cpu(bsb.arraystart2) | |
4795 | + __le64_to_cpu(bsb.length2) | |
4796 | < info->reshape_progress)) | |
4797 | goto nonew; /* No new data here */ | |
4798 | } else { | |
4799 | /* reshape_progress is decreasing */ | |
4800 | if (__le64_to_cpu(bsb.arraystart) >= | |
4801 | info->reshape_progress && | |
4802 | __le64_to_cpu(bsb.arraystart2) >= | |
4803 | info->reshape_progress) | |
4804 | goto nonew; /* No new data here */ | |
4805 | } | |
e9e43ec3 | 4806 | } |
ea0ebe96 N |
4807 | if (lseek64(fd, __le64_to_cpu(bsb.devstart)*512, 0)< 0) { |
4808 | second_fail: | |
4809 | if (verbose) | |
e7b84f9d N |
4810 | pr_err("Failed to verify secondary backup-metadata block on %s\n", |
4811 | devname); | |
353632d9 | 4812 | continue; /* Cannot seek */ |
ea0ebe96 | 4813 | } |
2efedc7b | 4814 | /* There should be a duplicate backup superblock 4k before here */ |
06b0d786 | 4815 | if (lseek64(fd, -4096, 1) < 0 || |
0155af90 | 4816 | read(fd, &bsb2, sizeof(bsb2)) != sizeof(bsb2)) |
ea0ebe96 | 4817 | goto second_fail; /* Cannot find leading superblock */ |
e9e43ec3 N |
4818 | if (bsb.magic[15] == '1') |
4819 | bsbsize = offsetof(struct mdp_backup_super, pad1); | |
4820 | else | |
4821 | bsbsize = offsetof(struct mdp_backup_super, pad); | |
ff94fb86 | 4822 | if (memcmp(&bsb2, &bsb, bsbsize) != 0) |
ea0ebe96 | 4823 | goto second_fail; /* Cannot find leading superblock */ |
2efedc7b | 4824 | |
353632d9 | 4825 | /* Now need the data offsets for all devices. */ |
503975b9 | 4826 | offsets = xmalloc(sizeof(*offsets)*info->array.raid_disks); |
353632d9 NB |
4827 | for(j=0; j<info->array.raid_disks; j++) { |
4828 | if (fdlist[j] < 0) | |
4829 | continue; | |
3da92f27 | 4830 | if (st->ss->load_super(st, fdlist[j], NULL)) |
353632d9 NB |
4831 | /* FIXME should be this be an error */ |
4832 | continue; | |
a5d85af7 | 4833 | st->ss->getinfo_super(st, &dinfo, NULL); |
3da92f27 | 4834 | st->ss->free_super(st); |
14e5b4d7 | 4835 | offsets[j] = dinfo.data_offset * 512; |
353632d9 | 4836 | } |
d56dd607 | 4837 | printf("%s: restoring critical section\n", Name); |
353632d9 NB |
4838 | |
4839 | if (restore_stripes(fdlist, offsets, | |
4840 | info->array.raid_disks, | |
4841 | info->new_chunk, | |
4842 | info->new_level, | |
4843 | info->new_layout, | |
06b0d786 | 4844 | fd, __le64_to_cpu(bsb.devstart)*512, |
92dcdf7c | 4845 | __le64_to_cpu(bsb.arraystart)*512, |
2fcb75ae | 4846 | __le64_to_cpu(bsb.length)*512, NULL)) { |
e9e43ec3 | 4847 | /* didn't succeed, so giveup */ |
ea0ebe96 | 4848 | if (verbose) |
e7b84f9d | 4849 | pr_err("Error restoring backup from %s\n", |
ea0ebe96 | 4850 | devname); |
730ae51f | 4851 | free(offsets); |
e9e43ec3 N |
4852 | return 1; |
4853 | } | |
24daa16f | 4854 | |
e9e43ec3 N |
4855 | if (bsb.magic[15] == '2' && |
4856 | restore_stripes(fdlist, offsets, | |
4857 | info->array.raid_disks, | |
4858 | info->new_chunk, | |
4859 | info->new_level, | |
4860 | info->new_layout, | |
4861 | fd, __le64_to_cpu(bsb.devstart)*512 + | |
4862 | __le64_to_cpu(bsb.devstart2)*512, | |
92dcdf7c | 4863 | __le64_to_cpu(bsb.arraystart2)*512, |
2fcb75ae | 4864 | __le64_to_cpu(bsb.length2)*512, NULL)) { |
353632d9 | 4865 | /* didn't succeed, so giveup */ |
ea0ebe96 | 4866 | if (verbose) |
e7b84f9d | 4867 | pr_err("Error restoring second backup from %s\n", |
ea0ebe96 | 4868 | devname); |
730ae51f | 4869 | free(offsets); |
2295250a | 4870 | return 1; |
353632d9 NB |
4871 | } |
4872 | ||
730ae51f | 4873 | free(offsets); |
e9e43ec3 | 4874 | |
353632d9 NB |
4875 | /* Ok, so the data is restored. Let's update those superblocks. */ |
4876 | ||
10af14c4 N |
4877 | lo = hi = 0; |
4878 | if (bsb.length) { | |
4879 | lo = __le64_to_cpu(bsb.arraystart); | |
4880 | hi = lo + __le64_to_cpu(bsb.length); | |
4881 | } | |
4882 | if (bsb.magic[15] == '2' && bsb.length2) { | |
4883 | unsigned long long lo1, hi1; | |
4884 | lo1 = __le64_to_cpu(bsb.arraystart2); | |
4885 | hi1 = lo1 + __le64_to_cpu(bsb.length2); | |
4886 | if (lo == hi) { | |
4887 | lo = lo1; | |
4888 | hi = hi1; | |
4889 | } else if (lo < lo1) | |
4890 | hi = hi1; | |
4891 | else | |
4892 | lo = lo1; | |
4893 | } | |
4894 | if (lo < hi && | |
4895 | (info->reshape_progress < lo || | |
4896 | info->reshape_progress > hi)) | |
4897 | /* backup does not affect reshape_progress*/ ; | |
4898 | else if (info->delta_disks >= 0) { | |
e9e43ec3 N |
4899 | info->reshape_progress = __le64_to_cpu(bsb.arraystart) + |
4900 | __le64_to_cpu(bsb.length); | |
4901 | if (bsb.magic[15] == '2') { | |
4902 | unsigned long long p2 = __le64_to_cpu(bsb.arraystart2) + | |
4903 | __le64_to_cpu(bsb.length2); | |
4904 | if (p2 > info->reshape_progress) | |
4905 | info->reshape_progress = p2; | |
4906 | } | |
4907 | } else { | |
4908 | info->reshape_progress = __le64_to_cpu(bsb.arraystart); | |
4909 | if (bsb.magic[15] == '2') { | |
4910 | unsigned long long p2 = __le64_to_cpu(bsb.arraystart2); | |
4911 | if (p2 < info->reshape_progress) | |
4912 | info->reshape_progress = p2; | |
4913 | } | |
4914 | } | |
353632d9 | 4915 | for (j=0; j<info->array.raid_disks; j++) { |
ca3b6696 N |
4916 | if (fdlist[j] < 0) |
4917 | continue; | |
3da92f27 | 4918 | if (st->ss->load_super(st, fdlist[j], NULL)) |
353632d9 | 4919 | continue; |
a5d85af7 | 4920 | st->ss->getinfo_super(st, &dinfo, NULL); |
e9e43ec3 | 4921 | dinfo.reshape_progress = info->reshape_progress; |
3da92f27 | 4922 | st->ss->update_super(st, &dinfo, |
68c7d6d7 NB |
4923 | "_reshape_progress", |
4924 | NULL,0, 0, NULL); | |
3da92f27 NB |
4925 | st->ss->store_super(st, fdlist[j]); |
4926 | st->ss->free_super(st); | |
353632d9 | 4927 | } |
353632d9 NB |
4928 | return 0; |
4929 | } | |
6e9eac4f NB |
4930 | /* Didn't find any backup data, try to see if any |
4931 | * was needed. | |
4932 | */ | |
82f2d6ab N |
4933 | if (info->delta_disks < 0) { |
4934 | /* When shrinking, the critical section is at the end. | |
4935 | * So see if we are before the critical section. | |
4936 | */ | |
4937 | unsigned long long first_block; | |
4938 | nstripe = ostripe = 0; | |
4939 | first_block = 0; | |
4940 | while (ostripe >= nstripe) { | |
4941 | ostripe += info->array.chunk_size / 512; | |
4942 | first_block = ostripe * odata; | |
4943 | nstripe = first_block / ndata / (info->new_chunk/512) * | |
4944 | (info->new_chunk/512); | |
4945 | } | |
4946 | ||
4947 | if (info->reshape_progress >= first_block) | |
4948 | return 0; | |
6e9eac4f | 4949 | } |
82f2d6ab N |
4950 | if (info->delta_disks > 0) { |
4951 | /* See if we are beyond the critical section. */ | |
4952 | unsigned long long last_block; | |
4953 | nstripe = ostripe = 0; | |
4954 | last_block = 0; | |
4955 | while (nstripe >= ostripe) { | |
4956 | nstripe += info->new_chunk / 512; | |
4957 | last_block = nstripe * ndata; | |
4958 | ostripe = last_block / odata / (info->array.chunk_size/512) * | |
4959 | (info->array.chunk_size/512); | |
4960 | } | |
6e9eac4f | 4961 | |
82f2d6ab N |
4962 | if (info->reshape_progress >= last_block) |
4963 | return 0; | |
4964 | } | |
6e9eac4f | 4965 | /* needed to recover critical section! */ |
ea0ebe96 | 4966 | if (verbose) |
e7b84f9d | 4967 | pr_err("Failed to find backup of critical section\n"); |
2295250a | 4968 | return 1; |
353632d9 | 4969 | } |
e9e43ec3 | 4970 | |
2dddadb0 AK |
4971 | int Grow_continue_command(char *devname, int fd, |
4972 | char *backup_file, int verbose) | |
4973 | { | |
4974 | int ret_val = 0; | |
4975 | struct supertype *st = NULL; | |
4976 | struct mdinfo *content = NULL; | |
4977 | struct mdinfo array; | |
4978 | char *subarray = NULL; | |
4979 | struct mdinfo *cc = NULL; | |
4980 | struct mdstat_ent *mdstat = NULL; | |
2dddadb0 | 4981 | int cfd = -1; |
12add445 | 4982 | int fd2; |
2dddadb0 AK |
4983 | |
4984 | dprintf("Grow continue from command line called for %s\n", | |
4985 | devname); | |
4986 | ||
4987 | st = super_by_fd(fd, &subarray); | |
4988 | if (!st || !st->ss) { | |
e7b84f9d N |
4989 | pr_err("Unable to determine metadata format for %s\n", |
4990 | devname); | |
2dddadb0 AK |
4991 | return 1; |
4992 | } | |
4993 | dprintf("Grow continue is run for "); | |
4994 | if (st->ss->external == 0) { | |
e0ab37a3 | 4995 | int d; |
8800f853 | 4996 | int cnt = 5; |
1ade5cc1 | 4997 | dprintf_cont("native array (%s)\n", devname); |
9cd39f01 JS |
4998 | if (md_get_array_info(fd, &array.array) < 0) { |
4999 | pr_err("%s is not an active md array - aborting\n", | |
5000 | devname); | |
2dddadb0 AK |
5001 | ret_val = 1; |
5002 | goto Grow_continue_command_exit; | |
5003 | } | |
5004 | content = &array; | |
a250ce24 | 5005 | sysfs_init(content, fd, NULL); |
e0ab37a3 N |
5006 | /* Need to load a superblock. |
5007 | * FIXME we should really get what we need from | |
5008 | * sysfs | |
5009 | */ | |
8800f853 XN |
5010 | do { |
5011 | for (d = 0; d < MAX_DISKS; d++) { | |
5012 | mdu_disk_info_t disk; | |
5013 | char *dv; | |
5014 | int err; | |
5015 | disk.number = d; | |
d97572f5 | 5016 | if (md_get_disk_info(fd, &disk) < 0) |
8800f853 XN |
5017 | continue; |
5018 | if (disk.major == 0 && disk.minor == 0) | |
5019 | continue; | |
5020 | if ((disk.state & (1 << MD_DISK_ACTIVE)) == 0) | |
5021 | continue; | |
5022 | dv = map_dev(disk.major, disk.minor, 1); | |
5023 | if (!dv) | |
5024 | continue; | |
5025 | fd2 = dev_open(dv, O_RDONLY); | |
5026 | if (fd2 < 0) | |
5027 | continue; | |
5028 | err = st->ss->load_super(st, fd2, NULL); | |
5029 | close(fd2); | |
5030 | if (err) | |
5031 | continue; | |
5032 | break; | |
5033 | } | |
5034 | if (d == MAX_DISKS) { | |
5035 | pr_err("Unable to load metadata for %s\n", | |
5036 | devname); | |
5037 | ret_val = 1; | |
5038 | goto Grow_continue_command_exit; | |
5039 | } | |
5040 | st->ss->getinfo_super(st, content, NULL); | |
5041 | if (!content->reshape_active) | |
5042 | sleep(3); | |
5043 | else | |
5044 | break; | |
5045 | } while (cnt-- > 0); | |
2dddadb0 | 5046 | } else { |
4dd2df09 | 5047 | char *container; |
2dddadb0 AK |
5048 | |
5049 | if (subarray) { | |
1ade5cc1 | 5050 | dprintf_cont("subarray (%s)\n", subarray); |
4dd2df09 N |
5051 | container = st->container_devnm; |
5052 | cfd = open_dev_excl(st->container_devnm); | |
2dddadb0 | 5053 | } else { |
4dd2df09 | 5054 | container = st->devnm; |
2dddadb0 | 5055 | close(fd); |
4dd2df09 | 5056 | cfd = open_dev_excl(st->devnm); |
1ade5cc1 | 5057 | dprintf_cont("container (%s)\n", container); |
2dddadb0 AK |
5058 | fd = cfd; |
5059 | } | |
5060 | if (cfd < 0) { | |
7a862a02 | 5061 | pr_err("Unable to open container for %s\n", devname); |
2dddadb0 AK |
5062 | ret_val = 1; |
5063 | goto Grow_continue_command_exit; | |
5064 | } | |
2dddadb0 AK |
5065 | |
5066 | /* find in container array under reshape | |
5067 | */ | |
5068 | ret_val = st->ss->load_container(st, cfd, NULL); | |
5069 | if (ret_val) { | |
e7b84f9d N |
5070 | pr_err("Cannot read superblock for %s\n", |
5071 | devname); | |
2dddadb0 AK |
5072 | ret_val = 1; |
5073 | goto Grow_continue_command_exit; | |
5074 | } | |
5075 | ||
446894ea | 5076 | cc = st->ss->container_content(st, subarray); |
2dddadb0 | 5077 | for (content = cc; content ; content = content->next) { |
9e4524df | 5078 | char *array_name; |
446894ea | 5079 | int allow_reshape = 1; |
2dddadb0 AK |
5080 | |
5081 | if (content->reshape_active == 0) | |
5082 | continue; | |
81219e70 LM |
5083 | /* The decision about array or container wide |
5084 | * reshape is taken in Grow_continue based | |
5085 | * content->reshape_active state, therefore we | |
5086 | * need to check_reshape based on | |
5087 | * reshape_active and subarray name | |
446894ea N |
5088 | */ |
5089 | if (content->array.state & (1<<MD_SB_BLOCK_VOLUME)) | |
5090 | allow_reshape = 0; | |
5091 | if (content->reshape_active == CONTAINER_RESHAPE && | |
5092 | (content->array.state | |
5093 | & (1<<MD_SB_BLOCK_CONTAINER_RESHAPE))) | |
5094 | allow_reshape = 0; | |
5095 | ||
81219e70 | 5096 | if (!allow_reshape) { |
7a862a02 | 5097 | pr_err("cannot continue reshape of an array in container with unsupported metadata: %s(%s)\n", |
4dd2df09 | 5098 | devname, container); |
81219e70 LM |
5099 | ret_val = 1; |
5100 | goto Grow_continue_command_exit; | |
5101 | } | |
2dddadb0 | 5102 | |
9e4524df JS |
5103 | array_name = strchr(content->text_version+1, '/')+1; |
5104 | mdstat = mdstat_by_subdev(array_name, container); | |
2dddadb0 AK |
5105 | if (!mdstat) |
5106 | continue; | |
1ca90aa6 | 5107 | if (mdstat->active == 0) { |
4dd2df09 N |
5108 | pr_err("Skipping inactive array %s.\n", |
5109 | mdstat->devnm); | |
1ca90aa6 AK |
5110 | free_mdstat(mdstat); |
5111 | mdstat = NULL; | |
5112 | continue; | |
5113 | } | |
2dddadb0 AK |
5114 | break; |
5115 | } | |
5116 | if (!content) { | |
7a862a02 | 5117 | pr_err("Unable to determine reshaped array for %s\n", devname); |
2dddadb0 AK |
5118 | ret_val = 1; |
5119 | goto Grow_continue_command_exit; | |
5120 | } | |
4dd2df09 | 5121 | fd2 = open_dev(mdstat->devnm); |
2dddadb0 | 5122 | if (fd2 < 0) { |
4dd2df09 | 5123 | pr_err("cannot open (%s)\n", mdstat->devnm); |
2dddadb0 AK |
5124 | ret_val = 1; |
5125 | goto Grow_continue_command_exit; | |
5126 | } | |
5127 | ||
dae13137 JS |
5128 | if (sysfs_init(content, fd2, mdstat->devnm)) { |
5129 | pr_err("Unable to initialize sysfs for %s, Grow cannot continue", | |
5130 | mdstat->devnm); | |
5131 | ret_val = 1; | |
5132 | close(fd2); | |
5133 | goto Grow_continue_command_exit; | |
5134 | } | |
2dddadb0 | 5135 | |
10df72a0 | 5136 | close(fd2); |
10df72a0 | 5137 | |
2dddadb0 AK |
5138 | /* start mdmon in case it is not running |
5139 | */ | |
4dd2df09 N |
5140 | if (!mdmon_running(container)) |
5141 | start_mdmon(container); | |
5142 | ping_monitor(container); | |
2dddadb0 | 5143 | |
4dd2df09 | 5144 | if (mdmon_running(container)) |
2dddadb0 AK |
5145 | st->update_tail = &st->updates; |
5146 | else { | |
7a862a02 | 5147 | pr_err("No mdmon found. Grow cannot continue.\n"); |
2dddadb0 AK |
5148 | ret_val = 1; |
5149 | goto Grow_continue_command_exit; | |
5150 | } | |
5151 | } | |
5152 | ||
f1fe496b AK |
5153 | /* verify that array under reshape is started from |
5154 | * correct position | |
5155 | */ | |
e0ab37a3 | 5156 | if (verify_reshape_position(content, content->array.level) < 0) { |
f1fe496b AK |
5157 | ret_val = 1; |
5158 | goto Grow_continue_command_exit; | |
5159 | } | |
5160 | ||
2dddadb0 AK |
5161 | /* continue reshape |
5162 | */ | |
06e293d0 | 5163 | ret_val = Grow_continue(fd, st, content, backup_file, 1, 0); |
2dddadb0 AK |
5164 | |
5165 | Grow_continue_command_exit: | |
2dddadb0 AK |
5166 | if (cfd > -1) |
5167 | close(cfd); | |
5168 | st->ss->free_super(st); | |
5169 | free_mdstat(mdstat); | |
5170 | sysfs_free(cc); | |
5171 | free(subarray); | |
5172 | ||
5173 | return ret_val; | |
5174 | } | |
5175 | ||
e9e43ec3 | 5176 | int Grow_continue(int mdfd, struct supertype *st, struct mdinfo *info, |
06e293d0 | 5177 | char *backup_file, int forked, int freeze_reshape) |
e9e43ec3 | 5178 | { |
3bd58dc6 AK |
5179 | int ret_val = 2; |
5180 | ||
5181 | if (!info->reshape_active) | |
5182 | return ret_val; | |
864a004f | 5183 | |
20a40eca | 5184 | if (st->ss->external) { |
4dd2df09 | 5185 | int cfd = open_dev(st->container_devnm); |
3db2fdd8 | 5186 | |
3bd58dc6 AK |
5187 | if (cfd < 0) |
5188 | return 1; | |
f362d22b | 5189 | |
4dd2df09 | 5190 | st->ss->load_container(st, cfd, st->container_devnm); |
3bd58dc6 | 5191 | close(cfd); |
4dd2df09 | 5192 | ret_val = reshape_container(st->container_devnm, NULL, mdfd, |
3bd58dc6 | 5193 | st, info, 0, backup_file, |
054cba77 | 5194 | 0, forked, |
8ecf12b9 N |
5195 | 1 | info->reshape_active, |
5196 | freeze_reshape); | |
3bd58dc6 AK |
5197 | } else |
5198 | ret_val = reshape_array(NULL, mdfd, "array", st, info, 1, | |
ca36d707 | 5199 | NULL, INVALID_SECTORS, |
06e293d0 | 5200 | backup_file, 0, forked, |
8ecf12b9 | 5201 | 1 | info->reshape_active, |
3bd58dc6 | 5202 | freeze_reshape); |
f362d22b | 5203 | |
3bd58dc6 | 5204 | return ret_val; |
e9e43ec3 | 5205 | } |
54ded86f N |
5206 | |
5207 | char *make_backup(char *name) | |
5208 | { | |
5209 | char *base = "backup_file-"; | |
5210 | int len; | |
5211 | char *fname; | |
5212 | ||
5213 | len = strlen(MAP_DIR) + 1 + strlen(base) + strlen(name)+1; | |
5214 | fname = xmalloc(len); | |
5215 | sprintf(fname, "%s/%s%s", MAP_DIR, base, name); | |
5216 | return fname; | |
5217 | } | |
5218 | ||
5219 | char *locate_backup(char *name) | |
5220 | { | |
5221 | char *fl = make_backup(name); | |
5222 | struct stat stb; | |
5223 | ||
5224 | if (stat(fl, &stb) == 0 && | |
5225 | S_ISREG(stb.st_mode)) | |
5226 | return fl; | |
5227 | ||
5228 | free(fl); | |
5229 | return NULL; | |
5230 | } |