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Commit | Line | Data |
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e5329c37 NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
ca3b6696 | 4 | * Copyright (C) 2001-2012 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> |
f9b08fec | 27 | #include <stdint.h> |
e5329c37 NB |
28 | |
29 | #if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN) | |
30 | #error no endian defined | |
31 | #endif | |
32 | #include "md_u.h" | |
33 | #include "md_p.h" | |
34 | ||
e9e43ec3 N |
35 | #ifndef offsetof |
36 | #define offsetof(t,f) ((size_t)&(((t*)0)->f)) | |
37 | #endif | |
38 | ||
3f54bd62 AK |
39 | int restore_backup(struct supertype *st, |
40 | struct mdinfo *content, | |
41 | int working_disks, | |
42 | int next_spare, | |
43 | char *backup_file, | |
44 | int verbose) | |
45 | { | |
46 | int i; | |
47 | int *fdlist; | |
48 | struct mdinfo *dev; | |
49 | int err; | |
50 | int disk_count = next_spare + working_disks; | |
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 | ||
72 | if (st->ss->external && st->ss->recover_backup) | |
73 | err = st->ss->recover_backup(st, content); | |
74 | else | |
75 | err = Grow_restart(st, content, fdlist, next_spare, | |
76 | backup_file, verbose > 0); | |
77 | ||
78 | while (next_spare > 0) { | |
cc7f63e5 N |
79 | next_spare--; |
80 | if (fdlist[next_spare] >= 0) | |
81 | close(fdlist[next_spare]); | |
3f54bd62 AK |
82 | } |
83 | free(fdlist); | |
84 | if (err) { | |
e7b84f9d N |
85 | pr_err("Failed to restore critical" |
86 | " section for reshape - sorry.\n"); | |
3f54bd62 | 87 | if (!backup_file) |
e7b84f9d | 88 | pr_err("Possibly you need" |
3f54bd62 AK |
89 | " to specify a --backup-file\n"); |
90 | return 1; | |
91 | } | |
92 | ||
93 | dprintf("restore_backup() returns status OK.\n"); | |
94 | return 0; | |
95 | } | |
96 | ||
e5329c37 NB |
97 | int Grow_Add_device(char *devname, int fd, char *newdev) |
98 | { | |
99 | /* Add a device to an active array. | |
100 | * Currently, just extend a linear array. | |
101 | * This requires writing a new superblock on the | |
102 | * new device, calling the kernel to add the device, | |
103 | * and if that succeeds, update the superblock on | |
104 | * all other devices. | |
105 | * This means that we need to *find* all other devices. | |
106 | */ | |
4b1ac34b NB |
107 | struct mdinfo info; |
108 | ||
e5329c37 NB |
109 | struct stat stb; |
110 | int nfd, fd2; | |
111 | int d, nd; | |
82d9eba6 | 112 | struct supertype *st = NULL; |
4725bc31 | 113 | char *subarray = NULL; |
e5329c37 | 114 | |
4b1ac34b | 115 | if (ioctl(fd, GET_ARRAY_INFO, &info.array) < 0) { |
e7b84f9d | 116 | pr_err("cannot get array info for %s\n", devname); |
e5329c37 NB |
117 | return 1; |
118 | } | |
119 | ||
4725bc31 | 120 | if (info.array.level != -1) { |
e7b84f9d | 121 | pr_err("can only add devices to linear arrays\n"); |
4725bc31 N |
122 | return 1; |
123 | } | |
124 | ||
125 | st = super_by_fd(fd, &subarray); | |
82d9eba6 | 126 | if (!st) { |
ca3b6696 N |
127 | pr_err("cannot handle arrays with superblock version %d\n", |
128 | info.array.major_version); | |
f9ce90ba NB |
129 | return 1; |
130 | } | |
131 | ||
4725bc31 | 132 | if (subarray) { |
e7b84f9d | 133 | pr_err("Cannot grow linear sub-arrays yet\n"); |
4725bc31 N |
134 | free(subarray); |
135 | free(st); | |
2641101b | 136 | return 1; |
e5329c37 NB |
137 | } |
138 | ||
6416d527 | 139 | nfd = open(newdev, O_RDWR|O_EXCL|O_DIRECT); |
e5329c37 | 140 | if (nfd < 0) { |
e7b84f9d | 141 | pr_err("cannot open %s\n", newdev); |
4725bc31 | 142 | free(st); |
e5329c37 NB |
143 | return 1; |
144 | } | |
145 | fstat(nfd, &stb); | |
146 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
e7b84f9d | 147 | pr_err("%s is not a block device!\n", newdev); |
e5329c37 | 148 | close(nfd); |
4725bc31 | 149 | free(st); |
e5329c37 NB |
150 | return 1; |
151 | } | |
ca3b6696 N |
152 | /* now check out all the devices and make sure we can read the |
153 | * superblock */ | |
4b1ac34b | 154 | for (d=0 ; d < info.array.raid_disks ; d++) { |
e5329c37 NB |
155 | mdu_disk_info_t disk; |
156 | char *dv; | |
157 | ||
4725bc31 N |
158 | st->ss->free_super(st); |
159 | ||
e5329c37 NB |
160 | disk.number = d; |
161 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) { | |
e7b84f9d | 162 | pr_err("cannot get device detail for device %d\n", |
e5329c37 | 163 | d); |
4725bc31 N |
164 | close(nfd); |
165 | free(st); | |
e5329c37 NB |
166 | return 1; |
167 | } | |
16c6fa80 | 168 | dv = map_dev(disk.major, disk.minor, 1); |
e5329c37 | 169 | if (!dv) { |
e7b84f9d | 170 | pr_err("cannot find device file for device %d\n", |
e5329c37 | 171 | d); |
4725bc31 N |
172 | close(nfd); |
173 | free(st); | |
e5329c37 NB |
174 | return 1; |
175 | } | |
16c6fa80 | 176 | fd2 = dev_open(dv, O_RDWR); |
68fe8c6e | 177 | if (fd2 < 0) { |
e7b84f9d | 178 | pr_err("cannot open device file %s\n", dv); |
4725bc31 N |
179 | close(nfd); |
180 | free(st); | |
e5329c37 NB |
181 | return 1; |
182 | } | |
3da92f27 NB |
183 | |
184 | if (st->ss->load_super(st, fd2, NULL)) { | |
e7b84f9d | 185 | pr_err("cannot find super block on %s\n", dv); |
4725bc31 | 186 | close(nfd); |
e5329c37 | 187 | close(fd2); |
4725bc31 | 188 | free(st); |
e5329c37 NB |
189 | return 1; |
190 | } | |
191 | close(fd2); | |
192 | } | |
193 | /* Ok, looks good. Lets update the superblock and write it out to | |
194 | * newdev. | |
195 | */ | |
aba69144 | 196 | |
4b1ac34b NB |
197 | info.disk.number = d; |
198 | info.disk.major = major(stb.st_rdev); | |
199 | info.disk.minor = minor(stb.st_rdev); | |
200 | info.disk.raid_disk = d; | |
201 | info.disk.state = (1 << MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE); | |
3da92f27 | 202 | st->ss->update_super(st, &info, "linear-grow-new", newdev, |
f752781f | 203 | 0, 0, NULL); |
e5329c37 | 204 | |
3da92f27 | 205 | if (st->ss->store_super(st, nfd)) { |
e7b84f9d | 206 | pr_err("Cannot store new superblock on %s\n", |
f752781f | 207 | newdev); |
e5329c37 NB |
208 | close(nfd); |
209 | return 1; | |
210 | } | |
e5329c37 | 211 | close(nfd); |
4b1ac34b NB |
212 | |
213 | if (ioctl(fd, ADD_NEW_DISK, &info.disk) != 0) { | |
e7b84f9d | 214 | pr_err("Cannot add new disk to this array\n"); |
e5329c37 NB |
215 | return 1; |
216 | } | |
217 | /* Well, that seems to have worked. | |
218 | * Now go through and update all superblocks | |
219 | */ | |
220 | ||
4b1ac34b | 221 | if (ioctl(fd, GET_ARRAY_INFO, &info.array) < 0) { |
e7b84f9d | 222 | pr_err("cannot get array info for %s\n", devname); |
e5329c37 NB |
223 | return 1; |
224 | } | |
225 | ||
226 | nd = d; | |
4b1ac34b | 227 | for (d=0 ; d < info.array.raid_disks ; d++) { |
e5329c37 NB |
228 | mdu_disk_info_t disk; |
229 | char *dv; | |
230 | ||
231 | disk.number = d; | |
232 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) { | |
e7b84f9d | 233 | pr_err("cannot get device detail for device %d\n", |
e5329c37 NB |
234 | d); |
235 | return 1; | |
236 | } | |
16c6fa80 | 237 | dv = map_dev(disk.major, disk.minor, 1); |
e5329c37 | 238 | if (!dv) { |
e7b84f9d | 239 | pr_err("cannot find device file for device %d\n", |
e5329c37 NB |
240 | d); |
241 | return 1; | |
242 | } | |
16c6fa80 | 243 | fd2 = dev_open(dv, O_RDWR); |
e5329c37 | 244 | if (fd2 < 0) { |
e7b84f9d | 245 | pr_err("cannot open device file %s\n", dv); |
e5329c37 NB |
246 | return 1; |
247 | } | |
3da92f27 | 248 | if (st->ss->load_super(st, fd2, NULL)) { |
e7b84f9d | 249 | pr_err("cannot find super block on %s\n", dv); |
e5329c37 NB |
250 | close(fd); |
251 | return 1; | |
252 | } | |
4b1ac34b NB |
253 | info.array.raid_disks = nd+1; |
254 | info.array.nr_disks = nd+1; | |
255 | info.array.active_disks = nd+1; | |
256 | info.array.working_disks = nd+1; | |
f752781f | 257 | |
3da92f27 | 258 | st->ss->update_super(st, &info, "linear-grow-update", dv, |
f752781f | 259 | 0, 0, NULL); |
aba69144 | 260 | |
3da92f27 | 261 | if (st->ss->store_super(st, fd2)) { |
e7b84f9d | 262 | pr_err("Cannot store new superblock on %s\n", dv); |
e5329c37 NB |
263 | close(fd2); |
264 | return 1; | |
265 | } | |
266 | close(fd2); | |
267 | } | |
268 | ||
269 | return 0; | |
270 | } | |
f5e166fe | 271 | |
50f01ba5 | 272 | int Grow_addbitmap(char *devname, int fd, struct context *c, struct shape *s) |
f5e166fe NB |
273 | { |
274 | /* | |
275 | * First check that array doesn't have a bitmap | |
276 | * Then create the bitmap | |
277 | * Then add it | |
278 | * | |
279 | * For internal bitmaps, we need to check the version, | |
280 | * find all the active devices, and write the bitmap block | |
281 | * to all devices | |
282 | */ | |
283 | mdu_bitmap_file_t bmf; | |
284 | mdu_array_info_t array; | |
285 | struct supertype *st; | |
4725bc31 | 286 | char *subarray = NULL; |
dcec9ee5 NB |
287 | int major = BITMAP_MAJOR_HI; |
288 | int vers = md_get_version(fd); | |
8fac0577 | 289 | unsigned long long bitmapsize, array_size; |
dcec9ee5 NB |
290 | |
291 | if (vers < 9003) { | |
292 | major = BITMAP_MAJOR_HOSTENDIAN; | |
e7b84f9d | 293 | pr_err("Warning - bitmaps created on this kernel" |
b3bd581b N |
294 | " are not portable\n" |
295 | " between different architectures. Consider upgrading" | |
296 | " the Linux kernel.\n"); | |
dcec9ee5 | 297 | } |
f5e166fe NB |
298 | |
299 | if (ioctl(fd, GET_BITMAP_FILE, &bmf) != 0) { | |
353632d9 | 300 | if (errno == ENOMEM) |
e7b84f9d | 301 | pr_err("Memory allocation failure.\n"); |
f5e166fe | 302 | else |
e7b84f9d | 303 | pr_err("bitmaps not supported by this kernel.\n"); |
f5e166fe NB |
304 | return 1; |
305 | } | |
306 | if (bmf.pathname[0]) { | |
50f01ba5 | 307 | if (strcmp(s->bitmap_file,"none")==0) { |
fe80f49b | 308 | if (ioctl(fd, SET_BITMAP_FILE, -1)!= 0) { |
e7b84f9d | 309 | pr_err("failed to remove bitmap %s\n", |
fe80f49b NB |
310 | bmf.pathname); |
311 | return 1; | |
312 | } | |
313 | return 0; | |
314 | } | |
e7b84f9d | 315 | pr_err("%s already has a bitmap (%s)\n", |
f5e166fe NB |
316 | devname, bmf.pathname); |
317 | return 1; | |
318 | } | |
319 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0) { | |
e7b84f9d | 320 | pr_err("cannot get array status for %s\n", devname); |
f5e166fe NB |
321 | return 1; |
322 | } | |
323 | if (array.state & (1<<MD_SB_BITMAP_PRESENT)) { | |
50f01ba5 | 324 | if (strcmp(s->bitmap_file, "none")==0) { |
fe80f49b NB |
325 | array.state &= ~(1<<MD_SB_BITMAP_PRESENT); |
326 | if (ioctl(fd, SET_ARRAY_INFO, &array)!= 0) { | |
e7b84f9d | 327 | pr_err("failed to remove internal bitmap.\n"); |
fe80f49b NB |
328 | return 1; |
329 | } | |
330 | return 0; | |
331 | } | |
e7b84f9d | 332 | pr_err("Internal bitmap already present on %s\n", |
f5e166fe NB |
333 | devname); |
334 | return 1; | |
335 | } | |
4725bc31 | 336 | |
50f01ba5 | 337 | if (strcmp(s->bitmap_file, "none") == 0) { |
e7b84f9d | 338 | pr_err("no bitmap found on %s\n", devname); |
4725bc31 N |
339 | return 1; |
340 | } | |
5b28bd56 | 341 | if (array.level <= 0) { |
e7b84f9d | 342 | pr_err("Bitmaps not meaningful with level %s\n", |
5b28bd56 NB |
343 | map_num(pers, array.level)?:"of this array"); |
344 | return 1; | |
345 | } | |
8fac0577 NB |
346 | bitmapsize = array.size; |
347 | bitmapsize <<= 1; | |
beae1dfe | 348 | if (get_dev_size(fd, NULL, &array_size) && |
8fac0577 NB |
349 | array_size > (0x7fffffffULL<<9)) { |
350 | /* Array is big enough that we cannot trust array.size | |
351 | * try other approaches | |
352 | */ | |
353 | bitmapsize = get_component_size(fd); | |
354 | } | |
8fac0577 | 355 | if (bitmapsize == 0) { |
e7b84f9d | 356 | pr_err("Cannot reliably determine size of array to create bitmap - sorry.\n"); |
8fac0577 NB |
357 | return 1; |
358 | } | |
359 | ||
f9c25f1d | 360 | if (array.level == 10) { |
8686f3ed | 361 | int ncopies = (array.layout&255)*((array.layout>>8)&255); |
f9c25f1d NB |
362 | bitmapsize = bitmapsize * array.raid_disks / ncopies; |
363 | } | |
364 | ||
4725bc31 | 365 | st = super_by_fd(fd, &subarray); |
f5e166fe | 366 | if (!st) { |
e7b84f9d | 367 | pr_err("Cannot understand version %d.%d\n", |
f5e166fe NB |
368 | array.major_version, array.minor_version); |
369 | return 1; | |
370 | } | |
4725bc31 | 371 | if (subarray) { |
e7b84f9d | 372 | pr_err("Cannot add bitmaps to sub-arrays yet\n"); |
4725bc31 N |
373 | free(subarray); |
374 | free(st); | |
fe80f49b | 375 | return 1; |
4725bc31 | 376 | } |
50f01ba5 | 377 | if (strcmp(s->bitmap_file, "internal") == 0) { |
c0c1acd6 | 378 | int rv; |
f5e166fe | 379 | int d; |
c0c1acd6 N |
380 | int offset_setable = 0; |
381 | struct mdinfo *mdi; | |
ebeb3663 | 382 | if (st->ss->add_internal_bitmap == NULL) { |
e7b84f9d | 383 | pr_err("Internal bitmaps not supported " |
ebeb3663 N |
384 | "with %s metadata\n", st->ss->name); |
385 | return 1; | |
386 | } | |
4dd2df09 | 387 | mdi = sysfs_read(fd, NULL, GET_BITMAP_LOCATION); |
c0c1acd6 N |
388 | if (mdi) |
389 | offset_setable = 1; | |
ea329559 | 390 | for (d=0; d< st->max_devs; d++) { |
f5e166fe NB |
391 | mdu_disk_info_t disk; |
392 | char *dv; | |
393 | disk.number = d; | |
394 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
395 | continue; | |
396 | if (disk.major == 0 && | |
397 | disk.minor == 0) | |
398 | continue; | |
399 | if ((disk.state & (1<<MD_DISK_SYNC))==0) | |
400 | continue; | |
16c6fa80 | 401 | dv = map_dev(disk.major, disk.minor, 1); |
f5e166fe | 402 | if (dv) { |
16c6fa80 | 403 | int fd2 = dev_open(dv, O_RDWR); |
f5e166fe NB |
404 | if (fd2 < 0) |
405 | continue; | |
3da92f27 | 406 | if (st->ss->load_super(st, fd2, NULL)==0) { |
199171a2 | 407 | if (st->ss->add_internal_bitmap( |
3da92f27 | 408 | st, |
50f01ba5 | 409 | &s->bitmap_chunk, c->delay, s->write_behind, |
c0c1acd6 N |
410 | bitmapsize, offset_setable, |
411 | major) | |
199171a2 | 412 | ) |
3da92f27 | 413 | st->ss->write_bitmap(st, fd2); |
21e92547 | 414 | else { |
ca3b6696 N |
415 | pr_err("failed to create internal bitmap" |
416 | " - chunksize problem.\n"); | |
21e92547 NB |
417 | close(fd2); |
418 | return 1; | |
419 | } | |
f5e166fe NB |
420 | } |
421 | close(fd2); | |
422 | } | |
423 | } | |
c0c1acd6 N |
424 | if (offset_setable) { |
425 | st->ss->getinfo_super(st, mdi, NULL); | |
4dd2df09 | 426 | sysfs_init(mdi, fd, NULL); |
012a8641 JS |
427 | rv = sysfs_set_num_signed(mdi, NULL, "bitmap/location", |
428 | mdi->bitmap_offset); | |
c0c1acd6 N |
429 | } else { |
430 | array.state |= (1<<MD_SB_BITMAP_PRESENT); | |
431 | rv = ioctl(fd, SET_ARRAY_INFO, &array); | |
432 | } | |
433 | if (rv < 0) { | |
ff634064 | 434 | if (errno == EBUSY) |
e7b84f9d N |
435 | pr_err("Cannot add bitmap while array is" |
436 | " resyncing or reshaping etc.\n"); | |
437 | pr_err("failed to set internal bitmap.\n"); | |
f5e166fe NB |
438 | return 1; |
439 | } | |
fe80f49b NB |
440 | } else { |
441 | int uuid[4]; | |
442 | int bitmap_fd; | |
443 | int d; | |
444 | int max_devs = st->max_devs; | |
fe80f49b NB |
445 | |
446 | /* try to load a superblock */ | |
ca3b6696 | 447 | for (d = 0; d < max_devs; d++) { |
fe80f49b NB |
448 | mdu_disk_info_t disk; |
449 | char *dv; | |
450 | int fd2; | |
451 | disk.number = d; | |
452 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
453 | continue; | |
454 | if ((disk.major==0 && disk.minor==0) || | |
455 | (disk.state & (1<<MD_DISK_REMOVED))) | |
456 | continue; | |
16c6fa80 | 457 | dv = map_dev(disk.major, disk.minor, 1); |
ca3b6696 N |
458 | if (!dv) |
459 | continue; | |
16c6fa80 | 460 | fd2 = dev_open(dv, O_RDONLY); |
e7344e90 JS |
461 | if (fd2 >= 0) { |
462 | if (st->ss->load_super(st, fd2, NULL) == 0) { | |
463 | close(fd2); | |
464 | st->ss->uuid_from_super(st, uuid); | |
465 | break; | |
466 | } | |
fe80f49b | 467 | close(fd2); |
fe80f49b | 468 | } |
fe80f49b NB |
469 | } |
470 | if (d == max_devs) { | |
e7b84f9d | 471 | pr_err("cannot find UUID for array!\n"); |
fe80f49b NB |
472 | return 1; |
473 | } | |
50f01ba5 N |
474 | if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, s->bitmap_chunk, |
475 | c->delay, s->write_behind, bitmapsize, major)) { | |
fe80f49b NB |
476 | return 1; |
477 | } | |
50f01ba5 | 478 | bitmap_fd = open(s->bitmap_file, O_RDWR); |
fe80f49b | 479 | if (bitmap_fd < 0) { |
e7b84f9d | 480 | pr_err("weird: %s cannot be opened\n", |
50f01ba5 | 481 | s->bitmap_file); |
fe80f49b NB |
482 | return 1; |
483 | } | |
484 | if (ioctl(fd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
ff634064 N |
485 | int err = errno; |
486 | if (errno == EBUSY) | |
e7b84f9d N |
487 | pr_err("Cannot add bitmap while array is" |
488 | " resyncing or reshaping etc.\n"); | |
489 | pr_err("Cannot set bitmap file for %s: %s\n", | |
ff634064 | 490 | devname, strerror(err)); |
fe80f49b NB |
491 | return 1; |
492 | } | |
493 | } | |
f5e166fe NB |
494 | |
495 | return 0; | |
496 | } | |
497 | ||
e86c9dd6 NB |
498 | /* |
499 | * When reshaping an array we might need to backup some data. | |
500 | * This is written to all spares with a 'super_block' describing it. | |
ff94fb86 | 501 | * The superblock goes 4K from the end of the used space on the |
e86c9dd6 NB |
502 | * device. |
503 | * It if written after the backup is complete. | |
504 | * It has the following structure. | |
505 | */ | |
506 | ||
5fdf37e3 | 507 | static struct mdp_backup_super { |
7236ee7a | 508 | char magic[16]; /* md_backup_data-1 or -2 */ |
e86c9dd6 NB |
509 | __u8 set_uuid[16]; |
510 | __u64 mtime; | |
511 | /* start/sizes in 512byte sectors */ | |
7236ee7a | 512 | __u64 devstart; /* address on backup device/file of data */ |
e86c9dd6 NB |
513 | __u64 arraystart; |
514 | __u64 length; | |
515 | __u32 sb_csum; /* csum of preceeding bytes. */ | |
7236ee7a N |
516 | __u32 pad1; |
517 | __u64 devstart2; /* offset in to data of second section */ | |
518 | __u64 arraystart2; | |
519 | __u64 length2; | |
520 | __u32 sb_csum2; /* csum of preceeding bytes. */ | |
521 | __u8 pad[512-68-32]; | |
5fdf37e3 | 522 | } __attribute__((aligned(512))) bsb, bsb2; |
e86c9dd6 | 523 | |
4411fb17 | 524 | static __u32 bsb_csum(char *buf, int len) |
e86c9dd6 NB |
525 | { |
526 | int i; | |
527 | int csum = 0; | |
ca3b6696 | 528 | for (i = 0; i < len; i++) |
e86c9dd6 NB |
529 | csum = (csum<<3) + buf[0]; |
530 | return __cpu_to_le32(csum); | |
531 | } | |
532 | ||
d7ca196c N |
533 | static int check_idle(struct supertype *st) |
534 | { | |
535 | /* Check that all member arrays for this container, or the | |
536 | * container of this array, are idle | |
537 | */ | |
4dd2df09 N |
538 | char *container = (st->container_devnm[0] |
539 | ? st->container_devnm : st->devnm); | |
d7ca196c N |
540 | struct mdstat_ent *ent, *e; |
541 | int is_idle = 1; | |
24daa16f | 542 | |
d7ca196c N |
543 | ent = mdstat_read(0, 0); |
544 | for (e = ent ; e; e = e->next) { | |
545 | if (!is_container_member(e, container)) | |
546 | continue; | |
547 | if (e->percent >= 0) { | |
548 | is_idle = 0; | |
549 | break; | |
550 | } | |
551 | } | |
552 | free_mdstat(ent); | |
553 | return is_idle; | |
554 | } | |
555 | ||
7f2ba464 | 556 | static int freeze_container(struct supertype *st) |
7236ee7a | 557 | { |
4dd2df09 N |
558 | char *container = (st->container_devnm[0] |
559 | ? st->container_devnm : st->devnm); | |
7f2ba464 | 560 | |
d7ca196c N |
561 | if (!check_idle(st)) |
562 | return -1; | |
24daa16f | 563 | |
7f2ba464 | 564 | if (block_monitor(container, 1)) { |
e7b84f9d | 565 | pr_err("failed to freeze container\n"); |
7f2ba464 DW |
566 | return -2; |
567 | } | |
568 | ||
569 | return 1; | |
570 | } | |
571 | ||
572 | static void unfreeze_container(struct supertype *st) | |
573 | { | |
4dd2df09 N |
574 | char *container = (st->container_devnm[0] |
575 | ? st->container_devnm : st->devnm); | |
7f2ba464 DW |
576 | |
577 | unblock_monitor(container, 1); | |
578 | } | |
579 | ||
580 | static int freeze(struct supertype *st) | |
581 | { | |
582 | /* Try to freeze resync/rebuild on this array/container. | |
7236ee7a | 583 | * Return -1 if the array is busy, |
7f2ba464 | 584 | * return -2 container cannot be frozen, |
7236ee7a N |
585 | * return 0 if this kernel doesn't support 'frozen' |
586 | * return 1 if it worked. | |
587 | */ | |
7f2ba464 DW |
588 | if (st->ss->external) |
589 | return freeze_container(st); | |
590 | else { | |
4dd2df09 | 591 | struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION); |
7f2ba464 | 592 | int err; |
815c8a7e | 593 | char buf[20]; |
7f2ba464 DW |
594 | |
595 | if (!sra) | |
596 | return -1; | |
815c8a7e N |
597 | /* Need to clear any 'read-auto' status */ |
598 | if (sysfs_get_str(sra, NULL, "array_state", buf, 20) > 0 && | |
599 | strncmp(buf, "read-auto", 9) == 0) | |
600 | sysfs_set_str(sra, NULL, "array_state", "clean"); | |
601 | ||
7f2ba464 DW |
602 | err = sysfs_freeze_array(sra); |
603 | sysfs_free(sra); | |
604 | return err; | |
605 | } | |
7236ee7a N |
606 | } |
607 | ||
9202b8eb | 608 | static void unfreeze(struct supertype *st) |
7236ee7a | 609 | { |
7f2ba464 DW |
610 | if (st->ss->external) |
611 | return unfreeze_container(st); | |
612 | else { | |
4dd2df09 | 613 | struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION); |
7f2ba464 DW |
614 | |
615 | if (sra) | |
616 | sysfs_set_str(sra, NULL, "sync_action", "idle"); | |
7f2ba464 DW |
617 | sysfs_free(sra); |
618 | } | |
7236ee7a N |
619 | } |
620 | ||
4411fb17 | 621 | static void wait_reshape(struct mdinfo *sra) |
7236ee7a N |
622 | { |
623 | int fd = sysfs_get_fd(sra, NULL, "sync_action"); | |
624 | char action[20]; | |
625 | ||
92a19f1a AK |
626 | if (fd < 0) |
627 | return; | |
628 | ||
629 | while (sysfs_fd_get_str(fd, action, 20) > 0 && | |
630 | strncmp(action, "reshape", 7) == 0) { | |
7236ee7a N |
631 | fd_set rfds; |
632 | FD_ZERO(&rfds); | |
633 | FD_SET(fd, &rfds); | |
634 | select(fd+1, NULL, NULL, &rfds, NULL); | |
92a19f1a AK |
635 | } |
636 | close(fd); | |
7236ee7a | 637 | } |
7bc71196 | 638 | |
7ec0996c LD |
639 | static int reshape_super(struct supertype *st, unsigned long long size, |
640 | int level, int layout, int chunksize, int raid_disks, | |
41784c88 | 641 | int delta_disks, char *backup_file, char *dev, |
016e00f5 | 642 | int direction, int verbose) |
7bc71196 DW |
643 | { |
644 | /* nothing extra to check in the native case */ | |
645 | if (!st->ss->external) | |
646 | return 0; | |
647 | if (!st->ss->reshape_super || | |
648 | !st->ss->manage_reshape) { | |
e7b84f9d | 649 | pr_err("%s metadata does not support reshape\n", |
7bc71196 DW |
650 | st->ss->name); |
651 | return 1; | |
652 | } | |
653 | ||
654 | return st->ss->reshape_super(st, size, level, layout, chunksize, | |
41784c88 | 655 | raid_disks, delta_disks, backup_file, dev, |
016e00f5 | 656 | direction, verbose); |
7bc71196 DW |
657 | } |
658 | ||
659 | static void sync_metadata(struct supertype *st) | |
660 | { | |
661 | if (st->ss->external) { | |
76266030 | 662 | if (st->update_tail) { |
7bc71196 | 663 | flush_metadata_updates(st); |
76266030 N |
664 | st->update_tail = &st->updates; |
665 | } else | |
7bc71196 DW |
666 | st->ss->sync_metadata(st); |
667 | } | |
668 | } | |
669 | ||
670 | static int subarray_set_num(char *container, struct mdinfo *sra, char *name, int n) | |
671 | { | |
672 | /* when dealing with external metadata subarrays we need to be | |
673 | * prepared to handle EAGAIN. The kernel may need to wait for | |
674 | * mdmon to mark the array active so the kernel can handle | |
675 | * allocations/writeback when preparing the reshape action | |
676 | * (md_allow_write()). We temporarily disable safe_mode_delay | |
677 | * to close a race with the array_state going clean before the | |
678 | * next write to raid_disks / stripe_cache_size | |
679 | */ | |
680 | char safe[50]; | |
681 | int rc; | |
682 | ||
683 | /* only 'raid_disks' and 'stripe_cache_size' trigger md_allow_write */ | |
5da9ab98 N |
684 | if (!container || |
685 | (strcmp(name, "raid_disks") != 0 && | |
686 | strcmp(name, "stripe_cache_size") != 0)) | |
7bc71196 DW |
687 | return sysfs_set_num(sra, NULL, name, n); |
688 | ||
689 | rc = sysfs_get_str(sra, NULL, "safe_mode_delay", safe, sizeof(safe)); | |
690 | if (rc <= 0) | |
691 | return -1; | |
692 | sysfs_set_num(sra, NULL, "safe_mode_delay", 0); | |
693 | rc = sysfs_set_num(sra, NULL, name, n); | |
694 | if (rc < 0 && errno == EAGAIN) { | |
695 | ping_monitor(container); | |
696 | /* if we get EAGAIN here then the monitor is not active | |
697 | * so stop trying | |
698 | */ | |
699 | rc = sysfs_set_num(sra, NULL, name, n); | |
700 | } | |
701 | sysfs_set_str(sra, NULL, "safe_mode_delay", safe); | |
702 | return rc; | |
703 | } | |
704 | ||
27a1e5b5 N |
705 | int start_reshape(struct mdinfo *sra, int already_running, |
706 | int before_data_disks, int data_disks) | |
47eb4d5a N |
707 | { |
708 | int err; | |
6937e6d2 AK |
709 | unsigned long long sync_max_to_set; |
710 | ||
0f28668b | 711 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); |
6937e6d2 AK |
712 | err = sysfs_set_num(sra, NULL, "suspend_hi", sra->reshape_progress); |
713 | err = err ?: sysfs_set_num(sra, NULL, "suspend_lo", | |
714 | sra->reshape_progress); | |
27a1e5b5 N |
715 | if (before_data_disks <= data_disks) |
716 | sync_max_to_set = sra->reshape_progress / data_disks; | |
717 | else | |
718 | sync_max_to_set = (sra->component_size * data_disks | |
719 | - sra->reshape_progress) / data_disks; | |
1e971e71 | 720 | if (!already_running) |
6937e6d2 AK |
721 | sysfs_set_num(sra, NULL, "sync_min", sync_max_to_set); |
722 | err = err ?: sysfs_set_num(sra, NULL, "sync_max", sync_max_to_set); | |
1e971e71 N |
723 | if (!already_running) |
724 | err = err ?: sysfs_set_str(sra, NULL, "sync_action", "reshape"); | |
47eb4d5a N |
725 | |
726 | return err; | |
727 | } | |
728 | ||
729 | void abort_reshape(struct mdinfo *sra) | |
730 | { | |
731 | sysfs_set_str(sra, NULL, "sync_action", "idle"); | |
732 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); | |
733 | sysfs_set_num(sra, NULL, "suspend_hi", 0); | |
734 | sysfs_set_num(sra, NULL, "suspend_lo", 0); | |
735 | sysfs_set_num(sra, NULL, "sync_min", 0); | |
736 | sysfs_set_str(sra, NULL, "sync_max", "max"); | |
737 | } | |
738 | ||
dfe77a9e KW |
739 | int remove_disks_for_takeover(struct supertype *st, |
740 | struct mdinfo *sra, | |
741 | int layout) | |
62a48395 AK |
742 | { |
743 | int nr_of_copies; | |
744 | struct mdinfo *remaining; | |
745 | int slot; | |
746 | ||
dfe77a9e KW |
747 | if (sra->array.level == 10) |
748 | nr_of_copies = layout & 0xff; | |
749 | else if (sra->array.level == 1) | |
750 | nr_of_copies = sra->array.raid_disks; | |
751 | else | |
752 | return 1; | |
62a48395 AK |
753 | |
754 | remaining = sra->devs; | |
755 | sra->devs = NULL; | |
756 | /* for each 'copy', select one device and remove from the list. */ | |
757 | for (slot = 0; slot < sra->array.raid_disks; slot += nr_of_copies) { | |
758 | struct mdinfo **diskp; | |
759 | int found = 0; | |
760 | ||
761 | /* Find a working device to keep */ | |
762 | for (diskp = &remaining; *diskp ; diskp = &(*diskp)->next) { | |
763 | struct mdinfo *disk = *diskp; | |
764 | ||
765 | if (disk->disk.raid_disk < slot) | |
766 | continue; | |
767 | if (disk->disk.raid_disk >= slot + nr_of_copies) | |
768 | continue; | |
769 | if (disk->disk.state & (1<<MD_DISK_REMOVED)) | |
770 | continue; | |
771 | if (disk->disk.state & (1<<MD_DISK_FAULTY)) | |
772 | continue; | |
773 | if (!(disk->disk.state & (1<<MD_DISK_SYNC))) | |
774 | continue; | |
775 | ||
776 | /* We have found a good disk to use! */ | |
777 | *diskp = disk->next; | |
778 | disk->next = sra->devs; | |
779 | sra->devs = disk; | |
780 | found = 1; | |
781 | break; | |
782 | } | |
783 | if (!found) | |
784 | break; | |
785 | } | |
786 | ||
787 | if (slot < sra->array.raid_disks) { | |
788 | /* didn't find all slots */ | |
789 | struct mdinfo **e; | |
790 | e = &remaining; | |
791 | while (*e) | |
792 | e = &(*e)->next; | |
793 | *e = sra->devs; | |
794 | sra->devs = remaining; | |
795 | return 1; | |
796 | } | |
797 | ||
798 | /* Remove all 'remaining' devices from the array */ | |
799 | while (remaining) { | |
800 | struct mdinfo *sd = remaining; | |
801 | remaining = sd->next; | |
802 | ||
803 | sysfs_set_str(sra, sd, "state", "faulty"); | |
804 | sysfs_set_str(sra, sd, "slot", "none"); | |
d5ca4a23 KW |
805 | /* for external metadata disks should be removed in mdmon */ |
806 | if (!st->ss->external) | |
807 | sysfs_set_str(sra, sd, "state", "remove"); | |
62a48395 AK |
808 | sd->disk.state |= (1<<MD_DISK_REMOVED); |
809 | sd->disk.state &= ~(1<<MD_DISK_SYNC); | |
810 | sd->next = sra->devs; | |
811 | sra->devs = sd; | |
812 | } | |
813 | return 0; | |
814 | } | |
815 | ||
130994cb AK |
816 | void reshape_free_fdlist(int *fdlist, |
817 | unsigned long long *offsets, | |
818 | int size) | |
819 | { | |
820 | int i; | |
821 | ||
822 | for (i = 0; i < size; i++) | |
823 | if (fdlist[i] >= 0) | |
824 | close(fdlist[i]); | |
825 | ||
826 | free(fdlist); | |
827 | free(offsets); | |
828 | } | |
829 | ||
830 | int reshape_prepare_fdlist(char *devname, | |
831 | struct mdinfo *sra, | |
832 | int raid_disks, | |
833 | int nrdisks, | |
834 | unsigned long blocks, | |
835 | char *backup_file, | |
836 | int *fdlist, | |
837 | unsigned long long *offsets) | |
838 | { | |
839 | int d = 0; | |
840 | struct mdinfo *sd; | |
841 | ||
a7dec3fd | 842 | enable_fds(nrdisks); |
130994cb AK |
843 | for (d = 0; d <= nrdisks; d++) |
844 | fdlist[d] = -1; | |
845 | d = raid_disks; | |
846 | for (sd = sra->devs; sd; sd = sd->next) { | |
847 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
848 | continue; | |
849 | if (sd->disk.state & (1<<MD_DISK_SYNC)) { | |
850 | char *dn = map_dev(sd->disk.major, | |
851 | sd->disk.minor, 1); | |
852 | fdlist[sd->disk.raid_disk] | |
853 | = dev_open(dn, O_RDONLY); | |
854 | offsets[sd->disk.raid_disk] = sd->data_offset*512; | |
855 | if (fdlist[sd->disk.raid_disk] < 0) { | |
e7b84f9d N |
856 | pr_err("%s: cannot open component %s\n", |
857 | devname, dn ? dn : "-unknown-"); | |
130994cb AK |
858 | d = -1; |
859 | goto release; | |
860 | } | |
861 | } else if (backup_file == NULL) { | |
862 | /* spare */ | |
863 | char *dn = map_dev(sd->disk.major, | |
864 | sd->disk.minor, 1); | |
865 | fdlist[d] = dev_open(dn, O_RDWR); | |
866 | offsets[d] = (sd->data_offset + sra->component_size - blocks - 8)*512; | |
867 | if (fdlist[d] < 0) { | |
e7b84f9d | 868 | pr_err("%s: cannot open component %s\n", |
130994cb AK |
869 | devname, dn ? dn : "-unknown-"); |
870 | d = -1; | |
871 | goto release; | |
872 | } | |
873 | d++; | |
874 | } | |
875 | } | |
876 | release: | |
877 | return d; | |
878 | } | |
879 | ||
e6e9d47b AK |
880 | int reshape_open_backup_file(char *backup_file, |
881 | int fd, | |
882 | char *devname, | |
883 | long blocks, | |
884 | int *fdlist, | |
a93f87ee N |
885 | unsigned long long *offsets, |
886 | int restart) | |
e6e9d47b AK |
887 | { |
888 | /* Return 1 on success, 0 on any form of failure */ | |
889 | /* need to check backup file is large enough */ | |
890 | char buf[512]; | |
891 | struct stat stb; | |
892 | unsigned int dev; | |
893 | int i; | |
894 | ||
a93f87ee | 895 | *fdlist = open(backup_file, O_RDWR|O_CREAT|(restart ? O_TRUNC : O_EXCL), |
e6e9d47b AK |
896 | S_IRUSR | S_IWUSR); |
897 | *offsets = 8 * 512; | |
898 | if (*fdlist < 0) { | |
e7b84f9d | 899 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
900 | devname, backup_file, strerror(errno)); |
901 | return 0; | |
902 | } | |
903 | /* Guard against backup file being on array device. | |
904 | * If array is partitioned or if LVM etc is in the | |
905 | * way this will not notice, but it is better than | |
906 | * nothing. | |
907 | */ | |
908 | fstat(*fdlist, &stb); | |
909 | dev = stb.st_dev; | |
910 | fstat(fd, &stb); | |
911 | if (stb.st_rdev == dev) { | |
e7b84f9d | 912 | pr_err("backup file must NOT be" |
e6e9d47b AK |
913 | " on the array being reshaped.\n"); |
914 | close(*fdlist); | |
915 | return 0; | |
916 | } | |
917 | ||
918 | memset(buf, 0, 512); | |
ca4fe0bf | 919 | for (i=0; i < blocks + 8 ; i++) { |
e6e9d47b | 920 | if (write(*fdlist, buf, 512) != 512) { |
e7b84f9d | 921 | pr_err("%s: cannot create" |
e6e9d47b AK |
922 | " backup file %s: %s\n", |
923 | devname, backup_file, strerror(errno)); | |
924 | return 0; | |
925 | } | |
926 | } | |
927 | if (fsync(*fdlist) != 0) { | |
e7b84f9d | 928 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
929 | devname, backup_file, strerror(errno)); |
930 | return 0; | |
931 | } | |
932 | ||
933 | return 1; | |
934 | } | |
935 | ||
b48e2e25 N |
936 | unsigned long GCD(unsigned long a, unsigned long b) |
937 | { | |
938 | while (a != b) { | |
939 | if (a < b) | |
940 | b -= a; | |
941 | if (b < a) | |
942 | a -= b; | |
943 | } | |
944 | return a; | |
945 | } | |
946 | ||
1c009fc2 AK |
947 | unsigned long compute_backup_blocks(int nchunk, int ochunk, |
948 | unsigned int ndata, unsigned int odata) | |
949 | { | |
950 | unsigned long a, b, blocks; | |
951 | /* So how much do we need to backup. | |
952 | * We need an amount of data which is both a whole number of | |
953 | * old stripes and a whole number of new stripes. | |
954 | * So LCM for (chunksize*datadisks). | |
955 | */ | |
956 | a = (ochunk/512) * odata; | |
957 | b = (nchunk/512) * ndata; | |
958 | /* Find GCD */ | |
b48e2e25 | 959 | a = GCD(a, b); |
1c009fc2 AK |
960 | /* LCM == product / GCD */ |
961 | blocks = (ochunk/512) * (nchunk/512) * odata * ndata / a; | |
962 | ||
963 | return blocks; | |
964 | } | |
965 | ||
5da9ab98 N |
966 | char *analyse_change(struct mdinfo *info, struct reshape *re) |
967 | { | |
968 | /* Based on the current array state in info->array and | |
969 | * the changes in info->new_* etc, determine: | |
970 | * - whether the change is possible | |
971 | * - Intermediate level/raid_disks/layout | |
972 | * - whether a restriping reshape is needed | |
973 | * - number of sectors in minimum change unit. This | |
974 | * will cover a whole number of stripes in 'before' and | |
975 | * 'after'. | |
976 | * | |
977 | * Return message if the change should be rejected | |
978 | * NULL if the change can be achieved | |
979 | * | |
980 | * This can be called as part of starting a reshape, or | |
981 | * when assembling an array that is undergoing reshape. | |
982 | */ | |
19ceb16d | 983 | int near, far, offset, copies; |
5da9ab98 | 984 | int new_disks; |
19ceb16d | 985 | int old_chunk, new_chunk; |
b545e14a N |
986 | /* delta_parity records change in number of devices |
987 | * caused by level change | |
988 | */ | |
989 | int delta_parity = 0; | |
5da9ab98 | 990 | |
6b2fc3c1 N |
991 | memset(re, 0, sizeof(*re)); |
992 | ||
5da9ab98 N |
993 | /* If a new level not explicitly given, we assume no-change */ |
994 | if (info->new_level == UnSet) | |
995 | info->new_level = info->array.level; | |
996 | ||
997 | if (info->new_chunk) | |
998 | switch (info->new_level) { | |
999 | case 0: | |
1000 | case 4: | |
1001 | case 5: | |
1002 | case 6: | |
1003 | case 10: | |
1004 | /* chunk size is meaningful, must divide component_size | |
1005 | * evenly | |
1006 | */ | |
1007 | if (info->component_size % (info->new_chunk/512)) | |
1008 | return "New chunk size does not" | |
1009 | " divide component size"; | |
1010 | break; | |
1011 | default: | |
1012 | return "chunk size not meaningful for this level"; | |
1013 | } | |
1014 | else | |
1015 | info->new_chunk = info->array.chunk_size; | |
1016 | ||
1017 | switch (info->array.level) { | |
90b60dfa N |
1018 | default: |
1019 | return "Cannot understand this RAID level"; | |
5da9ab98 N |
1020 | case 1: |
1021 | /* RAID1 can convert to RAID1 with different disks, or | |
dfe77a9e KW |
1022 | * raid5 with 2 disks, or |
1023 | * raid0 with 1 disk | |
5da9ab98 | 1024 | */ |
5ca3a902 N |
1025 | if (info->new_level > 1 && |
1026 | (info->component_size & 7)) | |
1027 | return "Cannot convert RAID1 of this size - " | |
1028 | "reduce size to multiple of 4K first."; | |
dfe77a9e | 1029 | if (info->new_level == 0) { |
b545e14a N |
1030 | if (info->delta_disks != UnSet && |
1031 | info->delta_disks != 0) | |
1032 | return "Cannot change number of disks " | |
1033 | "with RAID1->RAID0 conversion"; | |
dfe77a9e KW |
1034 | re->level = 0; |
1035 | re->before.data_disks = 1; | |
1036 | re->after.data_disks = 1; | |
dfe77a9e KW |
1037 | return NULL; |
1038 | } | |
5da9ab98 N |
1039 | if (info->new_level == 1) { |
1040 | if (info->delta_disks == UnSet) | |
1041 | /* Don't know what to do */ | |
1042 | return "no change requested for Growing RAID1"; | |
1043 | re->level = 1; | |
5da9ab98 N |
1044 | return NULL; |
1045 | } | |
1046 | if (info->array.raid_disks == 2 && | |
446d2a5a | 1047 | info->new_level == 5) { |
5652f2d9 | 1048 | |
5da9ab98 | 1049 | re->level = 5; |
5da9ab98 | 1050 | re->before.data_disks = 1; |
5652f2d9 N |
1051 | if (info->delta_disks != UnSet && |
1052 | info->delta_disks != 0) | |
1053 | re->after.data_disks = 1 + info->delta_disks; | |
1054 | else | |
1055 | re->after.data_disks = 1; | |
1056 | if (re->after.data_disks < 1) | |
1057 | return "Number of disks too small for RAID5"; | |
1058 | ||
5da9ab98 | 1059 | re->before.layout = ALGORITHM_LEFT_SYMMETRIC; |
446d2a5a N |
1060 | info->array.chunk_size = 65536; |
1061 | break; | |
5da9ab98 N |
1062 | } |
1063 | /* Could do some multi-stage conversions, but leave that to | |
1064 | * later. | |
1065 | */ | |
1066 | return "Impossibly level change request for RAID1"; | |
1067 | ||
1068 | case 10: | |
19ceb16d N |
1069 | /* RAID10 can be converted from near mode to |
1070 | * RAID0 by removing some devices. | |
1071 | * It can also be reshaped if the kernel supports | |
1072 | * new_data_offset. | |
5da9ab98 | 1073 | */ |
19ceb16d N |
1074 | switch (info->new_level) { |
1075 | case 0: | |
1076 | if ((info->array.layout & ~0xff) != 0x100) | |
1077 | return "Cannot Grow RAID10 with far/offset layout"; | |
1078 | /* number of devices must be multiple of number of copies */ | |
1079 | if (info->array.raid_disks % (info->array.layout & 0xff)) | |
1080 | return "RAID10 layout too complex for Grow operation"; | |
1081 | ||
1082 | new_disks = (info->array.raid_disks | |
1083 | / (info->array.layout & 0xff)); | |
1084 | if (info->delta_disks == UnSet) | |
1085 | info->delta_disks = (new_disks | |
1086 | - info->array.raid_disks); | |
5da9ab98 | 1087 | |
19ceb16d N |
1088 | if (info->delta_disks != new_disks - info->array.raid_disks) |
1089 | return "New number of raid-devices impossible for RAID10"; | |
1090 | if (info->new_chunk && | |
1091 | info->new_chunk != info->array.chunk_size) | |
1092 | return "Cannot change chunk-size with RAID10 Grow"; | |
1093 | ||
1094 | /* looks good */ | |
1095 | re->level = 0; | |
19ceb16d N |
1096 | re->before.data_disks = new_disks; |
1097 | re->after.data_disks = re->before.data_disks; | |
19ceb16d N |
1098 | return NULL; |
1099 | ||
1100 | case 10: | |
1101 | near = info->array.layout & 0xff; | |
1102 | far = (info->array.layout >> 8) & 0xff; | |
1103 | offset = info->array.layout & 0x10000; | |
1104 | if (far > 1 && !offset) | |
1105 | return "Cannot reshape RAID10 in far-mode"; | |
1106 | copies = near * far; | |
1107 | ||
1108 | old_chunk = info->array.chunk_size * far; | |
1109 | ||
1110 | if (info->new_layout == UnSet) | |
1111 | info->new_layout = info->array.layout; | |
1112 | else { | |
1113 | near = info->new_layout & 0xff; | |
1114 | far = (info->new_layout >> 8) & 0xff; | |
1115 | offset = info->new_layout & 0x10000; | |
1116 | if (far > 1 && !offset) | |
1117 | return "Cannot reshape RAID10 to far-mode"; | |
1118 | if (near * far != copies) | |
1119 | return "Cannot change number of copies" | |
1120 | " when reshaping RAID10"; | |
1121 | } | |
1122 | if (info->delta_disks == UnSet) | |
1123 | info->delta_disks = 0; | |
1124 | new_disks = (info->array.raid_disks + | |
1125 | info->delta_disks); | |
1126 | ||
1127 | new_chunk = info->new_chunk * far; | |
1128 | ||
1129 | re->level = 10; | |
19ceb16d N |
1130 | re->before.layout = info->array.layout; |
1131 | re->before.data_disks = info->array.raid_disks; | |
1132 | re->after.layout = info->new_layout; | |
1133 | re->after.data_disks = new_disks; | |
89ecd3cf N |
1134 | /* For RAID10 we don't do backup but do allow reshape, |
1135 | * so set backup_blocks to INVALID_SECTORS rather than | |
1136 | * zero. | |
1137 | * And there is no need to synchronise stripes on both | |
19ceb16d N |
1138 | * 'old' and 'new'. So the important |
1139 | * number is the minimum data_offset difference | |
1140 | * which is the larger of (offset copies * chunk). | |
1141 | */ | |
89ecd3cf N |
1142 | re->backup_blocks = INVALID_SECTORS; |
1143 | re->min_offset_change = max(old_chunk, new_chunk) / 512; | |
ee2429e0 | 1144 | if (new_disks < re->before.data_disks && |
89ecd3cf | 1145 | info->space_after < re->min_offset_change) |
ee2429e0 N |
1146 | /* Reduce component size by one chunk */ |
1147 | re->new_size = (info->component_size - | |
89ecd3cf | 1148 | re->min_offset_change); |
ee2429e0 N |
1149 | else |
1150 | re->new_size = info->component_size; | |
1151 | re->new_size = re->new_size * new_disks / copies; | |
19ceb16d | 1152 | return NULL; |
5da9ab98 | 1153 | |
19ceb16d N |
1154 | default: |
1155 | return "RAID10 can only be changed to RAID0"; | |
1156 | } | |
5da9ab98 N |
1157 | case 0: |
1158 | /* RAID0 can be converted to RAID10, or to RAID456 */ | |
1159 | if (info->new_level == 10) { | |
1160 | if (info->new_layout == UnSet && info->delta_disks == UnSet) { | |
1161 | /* Assume near=2 layout */ | |
1162 | info->new_layout = 0x102; | |
1163 | info->delta_disks = info->array.raid_disks; | |
1164 | } | |
1165 | if (info->new_layout == UnSet) { | |
1166 | int copies = 1 + (info->delta_disks | |
1167 | / info->array.raid_disks); | |
1168 | if (info->array.raid_disks * (copies-1) | |
1169 | != info->delta_disks) | |
1170 | return "Impossible number of devices" | |
1171 | " for RAID0->RAID10"; | |
1172 | info->new_layout = 0x100 + copies; | |
1173 | } | |
1174 | if (info->delta_disks == UnSet) { | |
1175 | int copies = info->new_layout & 0xff; | |
1176 | if (info->new_layout != 0x100 + copies) | |
1177 | return "New layout impossible" | |
1178 | " for RAID0->RAID10";; | |
1179 | info->delta_disks = (copies - 1) * | |
1180 | info->array.raid_disks; | |
1181 | } | |
1182 | if (info->new_chunk && | |
1183 | info->new_chunk != info->array.chunk_size) | |
1184 | return "Cannot change chunk-size with RAID0->RAID10"; | |
1185 | /* looks good */ | |
1186 | re->level = 10; | |
5da9ab98 N |
1187 | re->before.data_disks = (info->array.raid_disks + |
1188 | info->delta_disks); | |
031d445c | 1189 | re->after.data_disks = re->before.data_disks; |
5da9ab98 | 1190 | re->before.layout = info->new_layout; |
5da9ab98 N |
1191 | return NULL; |
1192 | } | |
1193 | ||
1194 | /* RAID0 can also covert to RAID0/4/5/6 by first converting to | |
1195 | * a raid4 style layout of the final level. | |
1196 | */ | |
1197 | switch (info->new_level) { | |
5da9ab98 | 1198 | case 4: |
b545e14a N |
1199 | delta_parity = 1; |
1200 | case 0: | |
5da9ab98 N |
1201 | re->level = 4; |
1202 | re->before.layout = 0; | |
1203 | break; | |
1204 | case 5: | |
b545e14a | 1205 | delta_parity = 1; |
5da9ab98 N |
1206 | re->level = 5; |
1207 | re->before.layout = ALGORITHM_PARITY_N; | |
1208 | break; | |
1209 | case 6: | |
b545e14a | 1210 | delta_parity = 2; |
5da9ab98 N |
1211 | re->level = 6; |
1212 | re->before.layout = ALGORITHM_PARITY_N; | |
1213 | break; | |
1214 | default: | |
1215 | return "Impossible level change requested"; | |
1216 | } | |
1217 | re->before.data_disks = info->array.raid_disks; | |
1218 | /* determining 'after' layout happens outside this 'switch' */ | |
1219 | break; | |
1220 | ||
1221 | case 4: | |
1222 | info->array.layout = ALGORITHM_PARITY_N; | |
1223 | case 5: | |
1224 | switch (info->new_level) { | |
f0cce442 | 1225 | case 0: |
b545e14a | 1226 | delta_parity = -1; |
5da9ab98 N |
1227 | case 4: |
1228 | re->level = info->array.level; | |
1229 | re->before.data_disks = info->array.raid_disks - 1; | |
1230 | re->before.layout = info->array.layout; | |
1231 | break; | |
1232 | case 5: | |
1233 | re->level = 5; | |
1234 | re->before.data_disks = info->array.raid_disks - 1; | |
1235 | re->before.layout = info->array.layout; | |
1236 | break; | |
1237 | case 6: | |
b545e14a | 1238 | delta_parity = 1; |
5da9ab98 N |
1239 | re->level = 6; |
1240 | re->before.data_disks = info->array.raid_disks - 1; | |
1241 | switch (info->array.layout) { | |
1242 | case ALGORITHM_LEFT_ASYMMETRIC: | |
1243 | re->before.layout = ALGORITHM_LEFT_ASYMMETRIC_6; | |
1244 | break; | |
1245 | case ALGORITHM_RIGHT_ASYMMETRIC: | |
1246 | re->before.layout = ALGORITHM_RIGHT_ASYMMETRIC_6; | |
1247 | break; | |
1248 | case ALGORITHM_LEFT_SYMMETRIC: | |
1249 | re->before.layout = ALGORITHM_LEFT_SYMMETRIC_6; | |
1250 | break; | |
1251 | case ALGORITHM_RIGHT_SYMMETRIC: | |
1252 | re->before.layout = ALGORITHM_RIGHT_SYMMETRIC_6; | |
1253 | break; | |
1254 | case ALGORITHM_PARITY_0: | |
1255 | re->before.layout = ALGORITHM_PARITY_0_6; | |
1256 | break; | |
1257 | case ALGORITHM_PARITY_N: | |
1258 | re->before.layout = ALGORITHM_PARITY_N_6; | |
1259 | break; | |
1260 | default: | |
1261 | return "Cannot convert an array with this layout"; | |
1262 | } | |
1263 | break; | |
1264 | case 1: | |
1265 | if (info->array.raid_disks != 2) | |
1266 | return "Can only convert a 2-device array to RAID1"; | |
b545e14a N |
1267 | if (info->delta_disks != UnSet && |
1268 | info->delta_disks != 0) | |
1269 | return "Cannot set raid_disk when " | |
1270 | "converting RAID5->RAID1"; | |
5da9ab98 | 1271 | re->level = 1; |
6a67848a N |
1272 | info->new_chunk = 0; |
1273 | return NULL; | |
5da9ab98 N |
1274 | default: |
1275 | return "Impossible level change requested"; | |
1276 | } | |
1277 | break; | |
1278 | case 6: | |
1279 | switch (info->new_level) { | |
1280 | case 4: | |
1281 | case 5: | |
b545e14a | 1282 | delta_parity = -1; |
5da9ab98 N |
1283 | case 6: |
1284 | re->level = 6; | |
1285 | re->before.data_disks = info->array.raid_disks - 2; | |
1286 | re->before.layout = info->array.layout; | |
1287 | break; | |
1288 | default: | |
1289 | return "Impossible level change requested"; | |
1290 | } | |
1291 | break; | |
1292 | } | |
1293 | ||
1294 | /* If we reached here then it looks like a re-stripe is | |
1295 | * happening. We have determined the intermediate level | |
1296 | * and initial raid_disks/layout and stored these in 're'. | |
1297 | * | |
1298 | * We need to deduce the final layout that can be atomically | |
1299 | * converted to the end state. | |
1300 | */ | |
1301 | switch (info->new_level) { | |
1302 | case 0: | |
1303 | /* We can only get to RAID0 from RAID4 or RAID5 | |
1304 | * with appropriate layout and one extra device | |
1305 | */ | |
1306 | if (re->level != 4 && re->level != 5) | |
1307 | return "Cannot covert to RAID0 from this level"; | |
b545e14a | 1308 | |
5da9ab98 N |
1309 | switch (re->level) { |
1310 | case 4: | |
fdcad551 | 1311 | re->before.layout = 0; |
ca3b6696 N |
1312 | re->after.layout = 0; |
1313 | break; | |
5da9ab98 | 1314 | case 5: |
ca3b6696 N |
1315 | re->after.layout = ALGORITHM_PARITY_N; |
1316 | break; | |
5da9ab98 N |
1317 | } |
1318 | break; | |
1319 | ||
1320 | case 4: | |
1321 | /* We can only get to RAID4 from RAID5 */ | |
1322 | if (re->level != 4 && re->level != 5) | |
1323 | return "Cannot convert to RAID4 from this level"; | |
b545e14a | 1324 | |
5da9ab98 N |
1325 | switch (re->level) { |
1326 | case 4: | |
fdcad551 | 1327 | re->before.layout = 0; |
ca3b6696 N |
1328 | re->after.layout = 0; |
1329 | break; | |
5da9ab98 | 1330 | case 5: |
ca3b6696 N |
1331 | re->after.layout = ALGORITHM_PARITY_N; |
1332 | break; | |
5da9ab98 N |
1333 | } |
1334 | break; | |
1335 | ||
1336 | case 5: | |
0073a6e1 | 1337 | /* We get to RAID5 from RAID5 or RAID6 */ |
5da9ab98 N |
1338 | if (re->level != 5 && re->level != 6) |
1339 | return "Cannot convert to RAID5 from this level"; | |
b545e14a | 1340 | |
5da9ab98 N |
1341 | switch (re->level) { |
1342 | case 5: | |
1343 | if (info->new_layout == UnSet) | |
1344 | re->after.layout = re->before.layout; | |
1345 | else | |
1346 | re->after.layout = info->new_layout; | |
1347 | break; | |
1348 | case 6: | |
4a870364 N |
1349 | if (info->new_layout == UnSet) |
1350 | info->new_layout = re->before.layout; | |
1351 | ||
5da9ab98 N |
1352 | /* after.layout needs to be raid6 version of new_layout */ |
1353 | if (info->new_layout == ALGORITHM_PARITY_N) | |
1354 | re->after.layout = ALGORITHM_PARITY_N; | |
1355 | else { | |
1356 | char layout[40]; | |
1357 | char *ls = map_num(r5layout, info->new_layout); | |
1358 | int l; | |
0073a6e1 N |
1359 | if (ls) { |
1360 | /* Current RAID6 layout has a RAID5 | |
1361 | * equivalent - good | |
1362 | */ | |
1363 | strcat(strcpy(layout, ls), "-6"); | |
1364 | l = map_name(r6layout, layout); | |
1365 | if (l == UnSet) | |
1366 | return "Cannot find RAID6 layout" | |
1367 | " to convert to"; | |
1368 | } else { | |
1369 | /* Current RAID6 has no equivalent. | |
1370 | * If it is already a '-6' layout we | |
1371 | * can leave it unchanged, else we must | |
1372 | * fail | |
1373 | */ | |
1374 | ls = map_num(r6layout, info->new_layout); | |
1375 | if (!ls || | |
1376 | strcmp(ls+strlen(ls)-2, "-6") != 0) | |
1377 | return "Please specify new layout"; | |
1378 | l = info->new_layout; | |
1379 | } | |
5da9ab98 N |
1380 | re->after.layout = l; |
1381 | } | |
1382 | } | |
1383 | break; | |
1384 | ||
1385 | case 6: | |
1386 | /* We must already be at level 6 */ | |
1387 | if (re->level != 6) | |
1388 | return "Impossible level change"; | |
5da9ab98 | 1389 | if (info->new_layout == UnSet) |
4a870364 | 1390 | re->after.layout = info->array.layout; |
5da9ab98 N |
1391 | else |
1392 | re->after.layout = info->new_layout; | |
1393 | break; | |
1394 | default: | |
1395 | return "Impossible level change requested"; | |
1396 | } | |
b545e14a N |
1397 | if (info->delta_disks == UnSet) |
1398 | info->delta_disks = delta_parity; | |
1399 | ||
1400 | re->after.data_disks = (re->before.data_disks | |
1401 | + info->delta_disks | |
1402 | - delta_parity); | |
5da9ab98 | 1403 | switch (re->level) { |
ca3b6696 N |
1404 | case 6: re->parity = 2; |
1405 | break; | |
5da9ab98 | 1406 | case 4: |
ca3b6696 N |
1407 | case 5: re->parity = 1; |
1408 | break; | |
1409 | default: re->parity = 0; | |
1410 | break; | |
5da9ab98 N |
1411 | } |
1412 | /* So we have a restripe operation, we need to calculate the number | |
1413 | * of blocks per reshape operation. | |
1414 | */ | |
ddbf2ebb | 1415 | re->new_size = info->component_size * re->before.data_disks; |
5da9ab98 N |
1416 | if (info->new_chunk == 0) |
1417 | info->new_chunk = info->array.chunk_size; | |
1418 | if (re->after.data_disks == re->before.data_disks && | |
1419 | re->after.layout == re->before.layout && | |
1420 | info->new_chunk == info->array.chunk_size) { | |
fdcad551 N |
1421 | /* Nothing to change, can change level immediately. */ |
1422 | re->level = info->new_level; | |
b4f8e38b | 1423 | re->backup_blocks = 0; |
5da9ab98 N |
1424 | return NULL; |
1425 | } | |
1426 | if (re->after.data_disks == 1 && re->before.data_disks == 1) { | |
446d2a5a | 1427 | /* chunk and layout changes make no difference */ |
fdcad551 | 1428 | re->level = info->new_level; |
b4f8e38b | 1429 | re->backup_blocks = 0; |
5da9ab98 N |
1430 | return NULL; |
1431 | } | |
1432 | ||
1433 | if (re->after.data_disks == re->before.data_disks && | |
1434 | get_linux_version() < 2006032) | |
1435 | return "in-place reshape is not safe before 2.6.32 - sorry."; | |
1436 | ||
1437 | if (re->after.data_disks < re->before.data_disks && | |
1438 | get_linux_version() < 2006030) | |
508ede86 | 1439 | return "reshape to fewer devices is not supported before 2.6.30 - sorry."; |
5da9ab98 | 1440 | |
b4f8e38b | 1441 | re->backup_blocks = compute_backup_blocks( |
5da9ab98 N |
1442 | info->new_chunk, info->array.chunk_size, |
1443 | re->after.data_disks, | |
1444 | re->before.data_disks); | |
63c12c89 | 1445 | re->min_offset_change = re->backup_blocks / re->before.data_disks; |
5da9ab98 N |
1446 | |
1447 | re->new_size = info->component_size * re->after.data_disks; | |
1448 | return NULL; | |
1449 | } | |
1450 | ||
54397ed9 AK |
1451 | static int set_array_size(struct supertype *st, struct mdinfo *sra, |
1452 | char *text_version) | |
1453 | { | |
1454 | struct mdinfo *info; | |
1455 | char *subarray; | |
1456 | int ret_val = -1; | |
1457 | ||
1458 | if ((st == NULL) || (sra == NULL)) | |
1459 | return ret_val; | |
1460 | ||
1461 | if (text_version == NULL) | |
1462 | text_version = sra->text_version; | |
1463 | subarray = strchr(text_version+1, '/')+1; | |
1464 | info = st->ss->container_content(st, subarray); | |
1465 | if (info) { | |
1466 | unsigned long long current_size = 0; | |
1467 | unsigned long long new_size = | |
1468 | info->custom_array_size/2; | |
1469 | ||
1470 | if (sysfs_get_ll(sra, NULL, "array_size", ¤t_size) == 0 && | |
1471 | new_size > current_size) { | |
1472 | if (sysfs_set_num(sra, NULL, "array_size", new_size) | |
1473 | < 0) | |
1474 | dprintf("Error: Cannot set array size"); | |
1475 | else { | |
1476 | ret_val = 0; | |
1477 | dprintf("Array size changed"); | |
1478 | } | |
1479 | dprintf(" from %llu to %llu.\n", | |
1480 | current_size, new_size); | |
1481 | } | |
1482 | sysfs_free(info); | |
1483 | } else | |
1484 | dprintf("Error: set_array_size(): info pointer in NULL\n"); | |
1485 | ||
1486 | return ret_val; | |
1487 | } | |
1488 | ||
5da9ab98 N |
1489 | static int reshape_array(char *container, int fd, char *devname, |
1490 | struct supertype *st, struct mdinfo *info, | |
e2e53a2d | 1491 | int force, struct mddev_dev *devlist, |
19ceb16d | 1492 | unsigned long long data_offset, |
ba728be7 | 1493 | char *backup_file, int verbose, int forked, |
b76b30e0 | 1494 | int restart, int freeze_reshape); |
493f5dd6 | 1495 | static int reshape_container(char *container, char *devname, |
9ad6f6e6 | 1496 | int mdfd, |
24daa16f | 1497 | struct supertype *st, |
5da9ab98 N |
1498 | struct mdinfo *info, |
1499 | int force, | |
1500 | char *backup_file, | |
ba728be7 | 1501 | int verbose, int restart, int freeze_reshape); |
1c009fc2 | 1502 | |
32754b7d | 1503 | int Grow_reshape(char *devname, int fd, |
e2e53a2d | 1504 | struct mddev_dev *devlist, |
40c9a66a | 1505 | unsigned long long data_offset, |
32754b7d | 1506 | struct context *c, struct shape *s) |
e86c9dd6 NB |
1507 | { |
1508 | /* Make some changes in the shape of an array. | |
1509 | * The kernel must support the change. | |
7236ee7a N |
1510 | * |
1511 | * There are three different changes. Each can trigger | |
1512 | * a resync or recovery so we freeze that until we have | |
1513 | * requested everything (if kernel supports freezing - 2.6.30). | |
1514 | * The steps are: | |
1515 | * - change size (i.e. component_size) | |
1516 | * - change level | |
1517 | * - change layout/chunksize/ndisks | |
1518 | * | |
1519 | * The last can require a reshape. It is different on different | |
1520 | * levels so we need to check the level before actioning it. | |
1521 | * Some times the level change needs to be requested after the | |
1522 | * reshape (e.g. raid6->raid5, raid5->raid0) | |
1523 | * | |
e86c9dd6 | 1524 | */ |
5da9ab98 | 1525 | struct mdu_array_info_s array; |
7236ee7a | 1526 | int rv = 0; |
e86c9dd6 | 1527 | struct supertype *st; |
4725bc31 | 1528 | char *subarray = NULL; |
e86c9dd6 | 1529 | |
7236ee7a | 1530 | int frozen; |
7236ee7a | 1531 | int changed = 0; |
7bc71196 DW |
1532 | char *container = NULL; |
1533 | int cfd = -1; | |
e86c9dd6 | 1534 | |
e2e53a2d N |
1535 | struct mddev_dev *dv; |
1536 | int added_disks; | |
1537 | ||
5da9ab98 | 1538 | struct mdinfo info; |
7e0f6979 | 1539 | struct mdinfo *sra; |
e86c9dd6 NB |
1540 | |
1541 | if (ioctl(fd, GET_ARRAY_INFO, &array) < 0) { | |
ed503f89 | 1542 | pr_err("%s is not an active md array - aborting\n", |
e86c9dd6 NB |
1543 | devname); |
1544 | return 1; | |
1545 | } | |
4abcbc21 N |
1546 | if (data_offset != INVALID_SECTORS && array.level != 10 |
1547 | && (array.level < 4 || array.level > 6)) { | |
19ceb16d N |
1548 | pr_err("--grow --data-offset not yet supported\n"); |
1549 | return 1; | |
1550 | } | |
24d40069 | 1551 | |
32754b7d N |
1552 | if (s->size > 0 && |
1553 | (s->chunk || s->level!= UnSet || s->layout_str || s->raiddisks)) { | |
e7b84f9d | 1554 | pr_err("cannot change component size at the same time " |
9ce510be N |
1555 | "as other changes.\n" |
1556 | " Change size first, then check data is intact before " | |
1557 | "making other changes.\n"); | |
1558 | return 1; | |
1559 | } | |
1560 | ||
32754b7d | 1561 | if (s->raiddisks && s->raiddisks < array.raid_disks && array.level > 1 && |
24d40069 N |
1562 | get_linux_version() < 2006032 && |
1563 | !check_env("MDADM_FORCE_FEWER")) { | |
e7b84f9d | 1564 | pr_err("reducing the number of devices is not safe before Linux 2.6.32\n" |
24d40069 N |
1565 | " Please use a newer kernel\n"); |
1566 | return 1; | |
1567 | } | |
7bc71196 DW |
1568 | |
1569 | st = super_by_fd(fd, &subarray); | |
1570 | if (!st) { | |
e7b84f9d | 1571 | pr_err("Unable to determine metadata format for %s\n", devname); |
7bc71196 DW |
1572 | return 1; |
1573 | } | |
32754b7d | 1574 | if (s->raiddisks > st->max_devs) { |
e7b84f9d | 1575 | pr_err("Cannot increase raid-disks on this array" |
acab7bb1 N |
1576 | " beyond %d\n", st->max_devs); |
1577 | return 1; | |
1578 | } | |
7bc71196 DW |
1579 | |
1580 | /* in the external case we need to check that the requested reshape is | |
1581 | * supported, and perform an initial check that the container holds the | |
1582 | * pre-requisite spare devices (mdmon owns final validation) | |
1583 | */ | |
1584 | if (st->ss->external) { | |
7f2ba464 | 1585 | int rv; |
7bc71196 DW |
1586 | |
1587 | if (subarray) { | |
4dd2df09 N |
1588 | container = st->container_devnm; |
1589 | cfd = open_dev_excl(st->container_devnm); | |
7bc71196 | 1590 | } else { |
4dd2df09 | 1591 | container = st->devnm; |
7bc71196 | 1592 | close(fd); |
4dd2df09 | 1593 | cfd = open_dev_excl(st->devnm); |
7bc71196 DW |
1594 | fd = cfd; |
1595 | } | |
1596 | if (cfd < 0) { | |
e7b84f9d | 1597 | pr_err("Unable to open container for %s\n", |
7bc71196 | 1598 | devname); |
7f2ba464 | 1599 | free(subarray); |
7bc71196 DW |
1600 | return 1; |
1601 | } | |
1602 | ||
eb744788 AK |
1603 | rv = st->ss->load_container(st, cfd, NULL); |
1604 | ||
7f2ba464 | 1605 | if (rv) { |
e7b84f9d | 1606 | pr_err("Cannot read superblock for %s\n", |
7bc71196 | 1607 | devname); |
7f2ba464 | 1608 | free(subarray); |
7bc71196 DW |
1609 | return 1; |
1610 | } | |
1611 | ||
81219e70 LM |
1612 | /* check if operation is supported for metadata handler */ |
1613 | if (st->ss->container_content) { | |
1614 | struct mdinfo *cc = NULL; | |
1615 | struct mdinfo *content = NULL; | |
1616 | ||
1617 | cc = st->ss->container_content(st, subarray); | |
1618 | for (content = cc; content ; content = content->next) { | |
446894ea | 1619 | int allow_reshape = 1; |
81219e70 LM |
1620 | |
1621 | /* check if reshape is allowed based on metadata | |
1622 | * indications stored in content.array.status | |
1623 | */ | |
446894ea N |
1624 | if (content->array.state & (1<<MD_SB_BLOCK_VOLUME)) |
1625 | allow_reshape = 0; | |
1626 | if (content->array.state | |
1627 | & (1<<MD_SB_BLOCK_CONTAINER_RESHAPE)) | |
1628 | allow_reshape = 0; | |
81219e70 | 1629 | if (!allow_reshape) { |
e7b84f9d N |
1630 | pr_err("cannot reshape arrays in" |
1631 | " container with unsupported" | |
1632 | " metadata: %s(%s)\n", | |
4dd2df09 | 1633 | devname, container); |
81219e70 LM |
1634 | sysfs_free(cc); |
1635 | free(subarray); | |
1636 | return 1; | |
1637 | } | |
1638 | } | |
1639 | sysfs_free(cc); | |
1640 | } | |
4dd2df09 | 1641 | if (mdmon_running(container)) |
7bc71196 | 1642 | st->update_tail = &st->updates; |
e2e53a2d | 1643 | } |
691a36b7 | 1644 | |
e2e53a2d N |
1645 | added_disks = 0; |
1646 | for (dv = devlist; dv; dv = dv->next) | |
1647 | added_disks++; | |
32754b7d N |
1648 | if (s->raiddisks > array.raid_disks && |
1649 | array.spare_disks +added_disks < (s->raiddisks - array.raid_disks) && | |
1650 | !c->force) { | |
e7b84f9d N |
1651 | pr_err("Need %d spare%s to avoid degraded array," |
1652 | " and only have %d.\n" | |
1653 | " Use --force to over-ride this check.\n", | |
32754b7d N |
1654 | s->raiddisks - array.raid_disks, |
1655 | s->raiddisks - array.raid_disks == 1 ? "" : "s", | |
e7b84f9d | 1656 | array.spare_disks + added_disks); |
691a36b7 | 1657 | return 1; |
7bc71196 DW |
1658 | } |
1659 | ||
4dd2df09 | 1660 | sra = sysfs_read(fd, NULL, GET_LEVEL | GET_DISKS | GET_DEVS |
3fa436ac | 1661 | | GET_STATE | GET_VERSION); |
24daa16f | 1662 | if (sra) { |
7f2ba464 | 1663 | if (st->ss->external && subarray == NULL) { |
7bc71196 DW |
1664 | array.level = LEVEL_CONTAINER; |
1665 | sra->array.level = LEVEL_CONTAINER; | |
1666 | } | |
7bc71196 | 1667 | } else { |
e7b84f9d | 1668 | pr_err("failed to read sysfs parameters for %s\n", |
b526e52d DW |
1669 | devname); |
1670 | return 1; | |
1671 | } | |
7f2ba464 DW |
1672 | frozen = freeze(st); |
1673 | if (frozen < -1) { | |
1674 | /* freeze() already spewed the reason */ | |
8e61e0d7 | 1675 | sysfs_free(sra); |
7f2ba464 DW |
1676 | return 1; |
1677 | } else if (frozen < 0) { | |
e7b84f9d | 1678 | pr_err("%s is performing resync/recovery and cannot" |
7236ee7a | 1679 | " be reshaped\n", devname); |
8e61e0d7 | 1680 | sysfs_free(sra); |
7236ee7a N |
1681 | return 1; |
1682 | } | |
1683 | ||
1684 | /* ========= set size =============== */ | |
887a7a9e | 1685 | if (s->size > 0 && (s->size == MAX_SIZE || s->size != (unsigned)array.size)) { |
d04f65f4 N |
1686 | unsigned long long orig_size = get_component_size(fd)/2; |
1687 | unsigned long long min_csize; | |
d1537ed1 | 1688 | struct mdinfo *mdi; |
44f6f181 | 1689 | int raid0_takeover = 0; |
7bc71196 | 1690 | |
85f10287 | 1691 | if (orig_size == 0) |
d04f65f4 | 1692 | orig_size = (unsigned) array.size; |
85f10287 | 1693 | |
3920235e N |
1694 | if (orig_size == 0) { |
1695 | pr_err("Cannot set device size in this type of array.\n"); | |
1696 | rv = 1; | |
1697 | goto release; | |
1698 | } | |
1699 | ||
32754b7d N |
1700 | if (reshape_super(st, s->size, UnSet, UnSet, 0, 0, UnSet, NULL, |
1701 | devname, APPLY_METADATA_CHANGES, c->verbose > 0)) { | |
7bc71196 DW |
1702 | rv = 1; |
1703 | goto release; | |
1704 | } | |
1705 | sync_metadata(st); | |
7e7e9a4d AK |
1706 | if (st->ss->external) { |
1707 | /* metadata can have size limitation | |
1708 | * update size value according to metadata information | |
1709 | */ | |
1710 | struct mdinfo *sizeinfo = | |
1711 | st->ss->container_content(st, subarray); | |
1712 | if (sizeinfo) { | |
1713 | unsigned long long new_size = | |
1714 | sizeinfo->custom_array_size/2; | |
1715 | int data_disks = get_data_disks( | |
1716 | sizeinfo->array.level, | |
1717 | sizeinfo->array.layout, | |
1718 | sizeinfo->array.raid_disks); | |
1719 | new_size /= data_disks; | |
1720 | dprintf("Metadata size correction from %llu to " | |
1721 | "%llu (%llu)\n", orig_size, new_size, | |
1722 | new_size * data_disks); | |
32754b7d | 1723 | s->size = new_size; |
7e7e9a4d AK |
1724 | sysfs_free(sizeinfo); |
1725 | } | |
1726 | } | |
d1537ed1 N |
1727 | |
1728 | /* Update the size of each member device in case | |
1729 | * they have been resized. This will never reduce | |
1730 | * below the current used-size. The "size" attribute | |
20a46756 | 1731 | * understands '0' to mean 'max'. |
d1537ed1 | 1732 | */ |
20a46756 | 1733 | min_csize = 0; |
65a9798b | 1734 | rv = 0; |
20a46756 | 1735 | for (mdi = sra->devs; mdi; mdi = mdi->next) { |
d04f65f4 | 1736 | if (sysfs_set_num(sra, mdi, "size", |
32754b7d | 1737 | s->size == MAX_SIZE ? 0 : s->size) < 0) { |
b0a658ff N |
1738 | /* Probably kernel refusing to let us |
1739 | * reduce the size - not an error. | |
1740 | */ | |
20a46756 | 1741 | break; |
65a9798b | 1742 | } |
20a46756 N |
1743 | if (array.not_persistent == 0 && |
1744 | array.major_version == 0 && | |
1745 | get_linux_version() < 3001000) { | |
1746 | /* Dangerous to allow size to exceed 2TB */ | |
1747 | unsigned long long csize; | |
1748 | if (sysfs_get_ll(sra, mdi, "size", &csize) == 0) { | |
1749 | if (csize >= 2ULL*1024*1024*1024) | |
1750 | csize = 2ULL*1024*1024*1024; | |
1751 | if ((min_csize == 0 || (min_csize | |
d04f65f4 | 1752 | > csize))) |
20a46756 N |
1753 | min_csize = csize; |
1754 | } | |
1755 | } | |
1756 | } | |
65a9798b | 1757 | if (rv) { |
e7b84f9d | 1758 | pr_err("Cannot set size on " |
65a9798b AK |
1759 | "array members.\n"); |
1760 | goto size_change_error; | |
1761 | } | |
32754b7d | 1762 | if (min_csize && s->size > min_csize) { |
e7b84f9d | 1763 | pr_err("Cannot safely make this array " |
20a46756 N |
1764 | "use more than 2TB per device on this kernel.\n"); |
1765 | rv = 1; | |
65a9798b | 1766 | goto size_change_error; |
20a46756 | 1767 | } |
32754b7d | 1768 | if (min_csize && s->size == MAX_SIZE) { |
20a46756 N |
1769 | /* Don't let the kernel choose a size - it will get |
1770 | * it wrong | |
1771 | */ | |
e7b84f9d N |
1772 | pr_err("Limited v0.90 array to " |
1773 | "2TB per device\n"); | |
32754b7d | 1774 | s->size = min_csize; |
20a46756 | 1775 | } |
44f6f181 AK |
1776 | if (st->ss->external) { |
1777 | if (sra->array.level == 0) { | |
1778 | rv = sysfs_set_str(sra, NULL, "level", | |
1779 | "raid5"); | |
1780 | if (!rv) { | |
1781 | raid0_takeover = 1; | |
1782 | /* get array parametes after takeover | |
1783 | * to chane one parameter at time only | |
1784 | */ | |
1785 | rv = ioctl(fd, GET_ARRAY_INFO, &array); | |
1786 | } | |
1787 | } | |
1788 | /* make sure mdmon is | |
1789 | * aware of the new level */ | |
4dd2df09 N |
1790 | if (!mdmon_running(st->container_devnm)) |
1791 | start_mdmon(st->container_devnm); | |
44f6f181 | 1792 | ping_monitor(container); |
4dd2df09 | 1793 | if (mdmon_running(st->container_devnm) && |
44f6f181 AK |
1794 | st->update_tail == NULL) |
1795 | st->update_tail = &st->updates; | |
1796 | } | |
1797 | ||
0a8b92a6 N |
1798 | if (s->size == MAX_SIZE) |
1799 | s->size = 0; | |
1800 | array.size = s->size; | |
32754b7d | 1801 | if ((unsigned)array.size != s->size) { |
7236ee7a N |
1802 | /* got truncated to 32bit, write to |
1803 | * component_size instead | |
1804 | */ | |
1805 | if (sra) | |
1806 | rv = sysfs_set_num(sra, NULL, | |
32754b7d | 1807 | "component_size", s->size); |
7236ee7a N |
1808 | else |
1809 | rv = -1; | |
54397ed9 | 1810 | } else { |
7236ee7a | 1811 | rv = ioctl(fd, SET_ARRAY_INFO, &array); |
44f6f181 | 1812 | |
54397ed9 AK |
1813 | /* manage array size when it is managed externally |
1814 | */ | |
1815 | if ((rv == 0) && st->ss->external) | |
1816 | rv = set_array_size(st, sra, sra->text_version); | |
1817 | } | |
1818 | ||
44f6f181 AK |
1819 | if (raid0_takeover) { |
1820 | /* do not recync non-existing parity, | |
1821 | * we will drop it anyway | |
1822 | */ | |
b51702b8 | 1823 | sysfs_set_str(sra, NULL, "sync_action", "frozen"); |
44f6f181 AK |
1824 | /* go back to raid0, drop parity disk |
1825 | */ | |
1826 | sysfs_set_str(sra, NULL, "level", "raid0"); | |
1827 | ioctl(fd, GET_ARRAY_INFO, &array); | |
1828 | } | |
1829 | ||
65a9798b | 1830 | size_change_error: |
7236ee7a | 1831 | if (rv != 0) { |
39bbb392 | 1832 | int err = errno; |
7bc71196 DW |
1833 | |
1834 | /* restore metadata */ | |
1835 | if (reshape_super(st, orig_size, UnSet, UnSet, 0, 0, | |
016e00f5 AK |
1836 | UnSet, NULL, devname, |
1837 | ROLLBACK_METADATA_CHANGES, | |
32754b7d | 1838 | c->verbose) == 0) |
7bc71196 | 1839 | sync_metadata(st); |
e7b84f9d | 1840 | pr_err("Cannot set device size for %s: %s\n", |
39bbb392 | 1841 | devname, strerror(err)); |
24daa16f | 1842 | if (err == EBUSY && |
39bbb392 | 1843 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) |
e7b84f9d | 1844 | cont_err("Bitmap must be removed before size can be changed\n"); |
7236ee7a N |
1845 | rv = 1; |
1846 | goto release; | |
1847 | } | |
32754b7d | 1848 | if (s->assume_clean) { |
86952387 | 1849 | /* This will fail on kernels older than 3.0 unless |
ce52f92f N |
1850 | * a backport has been arranged. |
1851 | */ | |
1852 | if (sra == NULL || | |
1853 | sysfs_set_str(sra, NULL, "resync_start", "none") < 0) | |
86952387 | 1854 | pr_err("--assume-clean not supported with --grow on this kernel\n"); |
ce52f92f | 1855 | } |
7236ee7a | 1856 | ioctl(fd, GET_ARRAY_INFO, &array); |
32754b7d N |
1857 | s->size = get_component_size(fd)/2; |
1858 | if (s->size == 0) | |
1859 | s->size = array.size; | |
1860 | if (c->verbose >= 0) { | |
1861 | if (s->size == orig_size) | |
e7b84f9d | 1862 | pr_err("component size of %s " |
85f10287 | 1863 | "unchanged at %lluK\n", |
32754b7d | 1864 | devname, s->size); |
85f10287 | 1865 | else |
e7b84f9d | 1866 | pr_err("component size of %s " |
85f10287 | 1867 | "has been set to %lluK\n", |
32754b7d | 1868 | devname, s->size); |
85f10287 | 1869 | } |
7236ee7a | 1870 | changed = 1; |
7bc71196 | 1871 | } else if (array.level != LEVEL_CONTAINER) { |
32754b7d N |
1872 | s->size = get_component_size(fd)/2; |
1873 | if (s->size == 0) | |
1874 | s->size = array.size; | |
7236ee7a N |
1875 | } |
1876 | ||
d515d27f | 1877 | /* See if there is anything else to do */ |
32754b7d N |
1878 | if ((s->level == UnSet || s->level == array.level) && |
1879 | (s->layout_str == NULL) && | |
1880 | (s->chunk == 0 || s->chunk == array.chunk_size) && | |
8876bf0b | 1881 | data_offset == INVALID_SECTORS && |
32754b7d | 1882 | (s->raiddisks == 0 || s->raiddisks == array.raid_disks)) { |
d515d27f | 1883 | /* Nothing more to do */ |
32754b7d | 1884 | if (!changed && c->verbose >= 0) |
e7b84f9d | 1885 | pr_err("%s: no change requested\n", |
d515d27f N |
1886 | devname); |
1887 | goto release; | |
1888 | } | |
1889 | ||
dfe77a9e | 1890 | /* ========= check for Raid10/Raid1 -> Raid0 conversion =============== |
5da9ab98 | 1891 | * current implementation assumes that following conditions must be met: |
dfe77a9e | 1892 | * - RAID10: |
24daa16f N |
1893 | * - far_copies == 1 |
1894 | * - near_copies == 2 | |
62a48395 | 1895 | */ |
32754b7d | 1896 | if ((s->level == 0 && array.level == 10 && sra && |
24daa16f | 1897 | array.layout == ((1 << 8) + 2) && !(array.raid_disks & 1)) || |
32754b7d | 1898 | (s->level == 0 && array.level == 1 && sra)) { |
62a48395 | 1899 | int err; |
dfe77a9e | 1900 | err = remove_disks_for_takeover(st, sra, array.layout); |
62a48395 AK |
1901 | if (err) { |
1902 | dprintf(Name": Array cannot be reshaped\n"); | |
62a48395 AK |
1903 | if (cfd > -1) |
1904 | close(cfd); | |
5da9ab98 N |
1905 | rv = 1; |
1906 | goto release; | |
7236ee7a | 1907 | } |
fde139b9 N |
1908 | /* Make sure mdmon has seen the device removal |
1909 | * and updated metadata before we continue with | |
1910 | * level change | |
1911 | */ | |
1912 | if (container) | |
1913 | ping_monitor(container); | |
7236ee7a N |
1914 | } |
1915 | ||
8ff6d094 | 1916 | memset(&info, 0, sizeof(info)); |
5da9ab98 | 1917 | info.array = array; |
4dd2df09 | 1918 | sysfs_init(&info, fd, NULL); |
3fa436ac | 1919 | strcpy(info.text_version, sra->text_version); |
32754b7d N |
1920 | info.component_size = s->size*2; |
1921 | info.new_level = s->level; | |
1922 | info.new_chunk = s->chunk * 1024; | |
eff4954d N |
1923 | if (info.array.level == LEVEL_CONTAINER) { |
1924 | info.delta_disks = UnSet; | |
32754b7d N |
1925 | info.array.raid_disks = s->raiddisks; |
1926 | } else if (s->raiddisks) | |
1927 | info.delta_disks = s->raiddisks - info.array.raid_disks; | |
5da9ab98 N |
1928 | else |
1929 | info.delta_disks = UnSet; | |
32754b7d | 1930 | if (s->layout_str == NULL) { |
5da9ab98 N |
1931 | info.new_layout = UnSet; |
1932 | if (info.array.level == 6 && | |
1933 | (info.new_level == 6 || info.new_level == UnSet) && | |
1934 | info.array.layout >= 16) { | |
e7b84f9d N |
1935 | pr_err("%s has a non-standard layout. If you" |
1936 | " wish to preserve this\n", devname); | |
1937 | cont_err("during the reshape, please specify" | |
1938 | " --layout=preserve\n"); | |
1939 | cont_err("If you want to change it, specify a" | |
1940 | " layout or use --layout=normalise\n"); | |
7236ee7a N |
1941 | rv = 1; |
1942 | goto release; | |
1943 | } | |
32754b7d N |
1944 | } else if (strcmp(s->layout_str, "normalise") == 0 || |
1945 | strcmp(s->layout_str, "normalize") == 0) { | |
5da9ab98 N |
1946 | /* If we have a -6 RAID6 layout, remove the '-6'. */ |
1947 | info.new_layout = UnSet; | |
1948 | if (info.array.level == 6 && info.new_level == UnSet) { | |
1949 | char l[40], *h; | |
1950 | strcpy(l, map_num(r6layout, info.array.layout)); | |
1951 | h = strrchr(l, '-'); | |
1952 | if (h && strcmp(h, "-6") == 0) { | |
1953 | *h = 0; | |
1954 | info.new_layout = map_name(r6layout, l); | |
7236ee7a | 1955 | } |
385167f3 | 1956 | } else { |
e7b84f9d | 1957 | pr_err("%s is only meaningful when reshaping" |
32754b7d | 1958 | " a RAID6 array.\n", s->layout_str); |
385167f3 N |
1959 | rv = 1; |
1960 | goto release; | |
7236ee7a | 1961 | } |
32754b7d | 1962 | } else if (strcmp(s->layout_str, "preserve") == 0) { |
385167f3 N |
1963 | /* This means that a non-standard RAID6 layout |
1964 | * is OK. | |
1965 | * In particular: | |
1966 | * - When reshape a RAID6 (e.g. adding a device) | |
1967 | * which is in a non-standard layout, it is OK | |
1968 | * to preserve that layout. | |
1969 | * - When converting a RAID5 to RAID6, leave it in | |
1970 | * the XXX-6 layout, don't re-layout. | |
1971 | */ | |
1972 | if (info.array.level == 6 && info.new_level == UnSet) | |
1973 | info.new_layout = info.array.layout; | |
1974 | else if (info.array.level == 5 && info.new_level == 6) { | |
1975 | char l[40]; | |
1976 | strcpy(l, map_num(r5layout, info.array.layout)); | |
1977 | strcat(l, "-6"); | |
1978 | info.new_layout = map_name(r6layout, l); | |
1979 | } else { | |
e7b84f9d | 1980 | pr_err("%s in only meaningful when reshaping" |
32754b7d | 1981 | " to RAID6\n", s->layout_str); |
385167f3 N |
1982 | rv = 1; |
1983 | goto release; | |
1984 | } | |
5da9ab98 N |
1985 | } else { |
1986 | int l = info.new_level; | |
1987 | if (l == UnSet) | |
1988 | l = info.array.level; | |
1989 | switch (l) { | |
1990 | case 5: | |
32754b7d | 1991 | info.new_layout = map_name(r5layout, s->layout_str); |
5da9ab98 N |
1992 | break; |
1993 | case 6: | |
32754b7d | 1994 | info.new_layout = map_name(r6layout, s->layout_str); |
5da9ab98 N |
1995 | break; |
1996 | case 10: | |
32754b7d | 1997 | info.new_layout = parse_layout_10(s->layout_str); |
5da9ab98 N |
1998 | break; |
1999 | case LEVEL_FAULTY: | |
32754b7d | 2000 | info.new_layout = parse_layout_faulty(s->layout_str); |
5da9ab98 N |
2001 | break; |
2002 | default: | |
e7b84f9d | 2003 | pr_err("layout not meaningful" |
5da9ab98 | 2004 | " with this level\n"); |
7bc71196 DW |
2005 | rv = 1; |
2006 | goto release; | |
2007 | } | |
5da9ab98 | 2008 | if (info.new_layout == UnSet) { |
e7b84f9d | 2009 | pr_err("layout %s not understood" |
5da9ab98 | 2010 | " for this level\n", |
32754b7d | 2011 | s->layout_str); |
5da9ab98 N |
2012 | rv = 1; |
2013 | goto release; | |
7bc71196 | 2014 | } |
7236ee7a N |
2015 | } |
2016 | ||
907ea753 | 2017 | if (array.level == LEVEL_FAULTY) { |
32754b7d | 2018 | if (s->level != UnSet && s->level != array.level) { |
e7b84f9d | 2019 | pr_err("cannot change level of Faulty device\n"); |
907ea753 N |
2020 | rv =1 ; |
2021 | } | |
32754b7d | 2022 | if (s->chunk) { |
e7b84f9d | 2023 | pr_err("cannot set chunksize of Faulty device\n"); |
907ea753 N |
2024 | rv =1 ; |
2025 | } | |
32754b7d | 2026 | if (s->raiddisks && s->raiddisks != 1) { |
e7b84f9d | 2027 | pr_err("cannot set raid_disks of Faulty device\n"); |
907ea753 N |
2028 | rv =1 ; |
2029 | } | |
32754b7d | 2030 | if (s->layout_str) { |
907ea753 N |
2031 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0) { |
2032 | dprintf("Cannot get array information.\n"); | |
2033 | goto release; | |
2034 | } | |
2035 | array.layout = info.new_layout; | |
2036 | if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) { | |
e7b84f9d | 2037 | pr_err("failed to set new layout\n"); |
907ea753 | 2038 | rv = 1; |
32754b7d | 2039 | } else if (c->verbose >= 0) |
907ea753 N |
2040 | printf("layout for %s set to %d\n", |
2041 | devname, array.layout); | |
2042 | } | |
2043 | } else if (array.level == LEVEL_CONTAINER) { | |
5da9ab98 N |
2044 | /* This change is to be applied to every array in the |
2045 | * container. This is only needed when the metadata imposes | |
2046 | * restraints of the various arrays in the container. | |
2047 | * Currently we only know that IMSM requires all arrays | |
2048 | * to have the same number of devices so changing the | |
2049 | * number of devices (On-Line Capacity Expansion) must be | |
2050 | * performed at the level of the container | |
2051 | */ | |
9ad6f6e6 | 2052 | rv = reshape_container(container, devname, -1, st, &info, |
32754b7d | 2053 | c->force, c->backup_file, c->verbose, 0, 0); |
9202b8eb | 2054 | frozen = 0; |
5da9ab98 | 2055 | } else { |
08f9e34b AK |
2056 | /* get spare devices from external metadata |
2057 | */ | |
2058 | if (st->ss->external) { | |
2059 | struct mdinfo *info2; | |
2060 | ||
2061 | info2 = st->ss->container_content(st, subarray); | |
2062 | if (info2) { | |
2063 | info.array.spare_disks = | |
2064 | info2->array.spare_disks; | |
2065 | sysfs_free(info2); | |
2066 | } | |
2067 | } | |
2068 | ||
5da9ab98 N |
2069 | /* Impose these changes on a single array. First |
2070 | * check that the metadata is OK with the change. */ | |
7bc71196 | 2071 | |
7ec0996c | 2072 | if (reshape_super(st, 0, info.new_level, |
5da9ab98 | 2073 | info.new_layout, info.new_chunk, |
41784c88 | 2074 | info.array.raid_disks, info.delta_disks, |
32754b7d N |
2075 | c->backup_file, devname, APPLY_METADATA_CHANGES, |
2076 | c->verbose)) { | |
7bc71196 DW |
2077 | rv = 1; |
2078 | goto release; | |
2079 | } | |
5da9ab98 | 2080 | sync_metadata(st); |
32754b7d | 2081 | rv = reshape_array(container, fd, devname, st, &info, c->force, |
19ceb16d N |
2082 | devlist, data_offset, c->backup_file, c->verbose, |
2083 | 0, 0, 0); | |
9202b8eb | 2084 | frozen = 0; |
5da9ab98 N |
2085 | } |
2086 | release: | |
8e61e0d7 | 2087 | sysfs_free(sra); |
9202b8eb N |
2088 | if (frozen > 0) |
2089 | unfreeze(st); | |
5da9ab98 N |
2090 | return rv; |
2091 | } | |
7bc71196 | 2092 | |
f93346ef AK |
2093 | /* verify_reshape_position() |
2094 | * Function checks if reshape position in metadata is not farther | |
2095 | * than position in md. | |
2096 | * Return value: | |
2097 | * 0 : not valid sysfs entry | |
2098 | * it can be caused by not started reshape, it should be started | |
2099 | * by reshape array or raid0 array is before takeover | |
2100 | * -1 : error, reshape position is obviously wrong | |
2101 | * 1 : success, reshape progress correct or updated | |
2102 | */ | |
2103 | static int verify_reshape_position(struct mdinfo *info, int level) | |
2104 | { | |
2105 | int ret_val = 0; | |
2106 | char buf[40]; | |
178950ea | 2107 | int rv; |
f93346ef AK |
2108 | |
2109 | /* read sync_max, failure can mean raid0 array */ | |
178950ea AK |
2110 | rv = sysfs_get_str(info, NULL, "sync_max", buf, 40); |
2111 | ||
2112 | if (rv > 0) { | |
f93346ef AK |
2113 | char *ep; |
2114 | unsigned long long position = strtoull(buf, &ep, 0); | |
2115 | ||
2116 | dprintf(Name": Read sync_max sysfs entry is: %s\n", buf); | |
2117 | if (!(ep == buf || (*ep != 0 && *ep != '\n' && *ep != ' '))) { | |
2118 | position *= get_data_disks(level, | |
2119 | info->new_layout, | |
2120 | info->array.raid_disks); | |
2121 | if (info->reshape_progress < position) { | |
2122 | dprintf("Corrected reshape progress (%llu) to " | |
2123 | "md position (%llu)\n", | |
2124 | info->reshape_progress, position); | |
2125 | info->reshape_progress = position; | |
2126 | ret_val = 1; | |
2127 | } else if (info->reshape_progress > position) { | |
e7b84f9d N |
2128 | pr_err("Fatal error: array " |
2129 | "reshape was not properly frozen " | |
2130 | "(expected reshape position is %llu, " | |
2131 | "but reshape progress is %llu.\n", | |
2132 | position, info->reshape_progress); | |
f93346ef AK |
2133 | ret_val = -1; |
2134 | } else { | |
2135 | dprintf("Reshape position in md and metadata " | |
2136 | "are the same;"); | |
2137 | ret_val = 1; | |
2138 | } | |
2139 | } | |
178950ea AK |
2140 | } else if (rv == 0) { |
2141 | /* for valid sysfs entry, 0-length content | |
2142 | * should be indicated as error | |
2143 | */ | |
2144 | ret_val = -1; | |
f93346ef AK |
2145 | } |
2146 | ||
2147 | return ret_val; | |
2148 | } | |
2149 | ||
534f5432 N |
2150 | static unsigned long long choose_offset(unsigned long long lo, |
2151 | unsigned long long hi, | |
2152 | unsigned long long min, | |
2153 | unsigned long long max) | |
2154 | { | |
2155 | /* Choose a new offset between hi and lo. | |
2156 | * It must be between min and max, but | |
2157 | * we would prefer something near the middle of hi/lo, and also | |
2158 | * prefer to be aligned to a big power of 2. | |
2159 | * | |
2160 | * So we start with the middle, then for each bit, | |
2161 | * starting at '1' and increasing, if it is set, we either | |
2162 | * add it or subtract it if possible, preferring the option | |
2163 | * which is furthest from the boundary. | |
2164 | * | |
2165 | * We stop once we get a 1MB alignment. As units are in sectors, | |
2166 | * 1MB = 2*1024 sectors. | |
2167 | */ | |
2168 | unsigned long long choice = (lo + hi) / 2; | |
2169 | unsigned long long bit = 1; | |
2170 | ||
2171 | for (bit = 1; bit < 2*1024; bit = bit << 1) { | |
2172 | unsigned long long bigger, smaller; | |
2173 | if (! (bit & choice)) | |
2174 | continue; | |
2175 | bigger = choice + bit; | |
2176 | smaller = choice - bit; | |
2177 | if (bigger > max && smaller < min) | |
2178 | break; | |
2179 | if (bigger > max) | |
2180 | choice = smaller; | |
2181 | else if (smaller < min) | |
2182 | choice = bigger; | |
2183 | else if (hi - bigger > smaller - lo) | |
2184 | choice = bigger; | |
2185 | else | |
2186 | choice = smaller; | |
2187 | } | |
2188 | return choice; | |
2189 | } | |
2190 | ||
13bbb145 | 2191 | static int set_new_data_offset(struct mdinfo *sra, struct supertype *st, |
50a4962f | 2192 | char *devname, int delta_disks, |
13bbb145 N |
2193 | unsigned long long data_offset, |
2194 | unsigned long long min) | |
19ceb16d | 2195 | { |
13bbb145 | 2196 | struct mdinfo *sd; |
19ceb16d N |
2197 | int dir = 0; |
2198 | int err = 0; | |
f9b08fec | 2199 | unsigned long long before, after; |
19ceb16d | 2200 | |
f9b08fec N |
2201 | /* Need to find min space before and after so same is used |
2202 | * on all devices | |
2203 | */ | |
2204 | before = UINT64_MAX; | |
2205 | after = UINT64_MAX; | |
19ceb16d N |
2206 | for (sd = sra->devs; sd; sd = sd->next) { |
2207 | char *dn; | |
2208 | int dfd; | |
2209 | int rv; | |
2210 | struct supertype *st2; | |
2211 | struct mdinfo info2; | |
2212 | ||
2213 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
2214 | continue; | |
2215 | dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
2216 | dfd = dev_open(dn, O_RDONLY); | |
2217 | if (dfd < 0) { | |
ed503f89 | 2218 | pr_err("%s: cannot open component %s\n", |
19ceb16d | 2219 | devname, dn ? dn : "-unknown-"); |
19ceb16d N |
2220 | goto release; |
2221 | } | |
2222 | st2 = dup_super(st); | |
2223 | rv = st2->ss->load_super(st2,dfd, NULL); | |
2224 | close(dfd); | |
2225 | if (rv) { | |
2226 | free(st2); | |
ed503f89 | 2227 | pr_err("%s: cannot get superblock from %s\n", |
19ceb16d N |
2228 | devname, dn); |
2229 | goto release; | |
2230 | } | |
2231 | st2->ss->getinfo_super(st2, &info2, NULL); | |
2232 | st2->ss->free_super(st2); | |
2233 | free(st2); | |
c4b26c64 N |
2234 | if (info2.space_before == 0 && |
2235 | info2.space_after == 0) { | |
2236 | /* Metadata doesn't support data_offset changes */ | |
2237 | return 1; | |
2238 | } | |
f9b08fec N |
2239 | if (before > info2.space_before) |
2240 | before = info2.space_before; | |
2241 | if (after > info2.space_after) | |
2242 | after = info2.space_after; | |
2243 | ||
2244 | if (data_offset != INVALID_SECTORS) { | |
2245 | if (dir == 0) { | |
2246 | if (info2.data_offset == data_offset) { | |
2247 | pr_err("%s: already has that data_offset\n", | |
2248 | dn); | |
2249 | goto release; | |
2250 | } | |
2251 | if (data_offset < info2.data_offset) | |
2252 | dir = -1; | |
2253 | else | |
2254 | dir = 1; | |
2255 | } else if ((data_offset <= info2.data_offset && dir == 1) || | |
2256 | (data_offset >= info2.data_offset && dir == -1)) { | |
2257 | pr_err("%s: differing data offsets on devices make this --data-offset setting impossible\n", | |
2258 | dn); | |
2259 | goto release; | |
2260 | } | |
2261 | } | |
2262 | } | |
2263 | if (before == UINT64_MAX) | |
2264 | /* impossible really, there must be no devices */ | |
2265 | return 1; | |
2266 | ||
2267 | for (sd = sra->devs; sd; sd = sd->next) { | |
2268 | char *dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
c0f0d812 | 2269 | unsigned long long new_data_offset; |
f9b08fec | 2270 | |
b397d7f3 N |
2271 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) |
2272 | continue; | |
50a4962f | 2273 | if (delta_disks < 0) { |
19ceb16d N |
2274 | /* Don't need any space as array is shrinking |
2275 | * just move data_offset up by min | |
2276 | */ | |
5582b118 | 2277 | if (data_offset == INVALID_SECTORS) |
c0f0d812 | 2278 | new_data_offset = sd->data_offset + min; |
19ceb16d | 2279 | else { |
c0f0d812 | 2280 | if (data_offset < sd->data_offset + min) { |
ed503f89 | 2281 | pr_err("--data-offset too small for %s\n", |
19ceb16d N |
2282 | dn); |
2283 | goto release; | |
2284 | } | |
c0f0d812 | 2285 | new_data_offset = data_offset; |
19ceb16d | 2286 | } |
50a4962f | 2287 | } else if (delta_disks > 0) { |
19ceb16d | 2288 | /* need space before */ |
f9b08fec | 2289 | if (before < min) { |
ed503f89 | 2290 | pr_err("Insufficient head-space for reshape on %s\n", |
19ceb16d N |
2291 | dn); |
2292 | goto release; | |
2293 | } | |
5582b118 | 2294 | if (data_offset == INVALID_SECTORS) |
c0f0d812 | 2295 | new_data_offset = sd->data_offset - min; |
19ceb16d | 2296 | else { |
c0f0d812 | 2297 | if (data_offset > sd->data_offset - min) { |
ed503f89 | 2298 | pr_err("--data-offset too large for %s\n", |
19ceb16d N |
2299 | dn); |
2300 | goto release; | |
2301 | } | |
c0f0d812 | 2302 | new_data_offset = data_offset; |
19ceb16d N |
2303 | } |
2304 | } else { | |
2305 | if (dir == 0) { | |
f9b08fec N |
2306 | /* can move up or down. If 'data_offset' |
2307 | * was set we would have already decided, | |
2308 | * so just choose direction with most space. | |
19ceb16d | 2309 | */ |
c0f0d812 | 2310 | if (before > after) |
19ceb16d N |
2311 | dir = -1; |
2312 | else | |
2313 | dir = 1; | |
19ceb16d | 2314 | } |
b397d7f3 N |
2315 | sysfs_set_str(sra, NULL, "reshape_direction", |
2316 | dir == 1 ? "backwards" : "forwards"); | |
c0f0d812 N |
2317 | if (dir > 0) { |
2318 | /* Increase data offset */ | |
f9b08fec | 2319 | if (after < min) { |
ed503f89 | 2320 | pr_err("Insufficient tail-space for reshape on %s\n", |
19ceb16d N |
2321 | dn); |
2322 | goto release; | |
2323 | } | |
5582b118 | 2324 | if (data_offset != INVALID_SECTORS && |
c0f0d812 | 2325 | data_offset < sd->data_offset + min) { |
ed503f89 | 2326 | pr_err("--data-offset too small on %s\n", |
19ceb16d N |
2327 | dn); |
2328 | goto release; | |
2329 | } | |
5582b118 | 2330 | if (data_offset != INVALID_SECTORS) |
c0f0d812 | 2331 | new_data_offset = data_offset; |
534f5432 N |
2332 | else |
2333 | new_data_offset = choose_offset(sd->data_offset, | |
2334 | sd->data_offset + after, | |
2335 | sd->data_offset + min, | |
2336 | sd->data_offset + after); | |
c0f0d812 N |
2337 | } else { |
2338 | /* Decrease data offset */ | |
f9b08fec | 2339 | if (before < min) { |
ed503f89 | 2340 | pr_err("insufficient head-room on %s\n", |
19ceb16d N |
2341 | dn); |
2342 | goto release; | |
2343 | } | |
5582b118 | 2344 | if (data_offset != INVALID_SECTORS && |
c0f0d812 | 2345 | data_offset < sd->data_offset - min) { |
ed503f89 | 2346 | pr_err("--data-offset too small on %s\n", |
19ceb16d N |
2347 | dn); |
2348 | goto release; | |
2349 | } | |
5582b118 | 2350 | if (data_offset != INVALID_SECTORS) |
c0f0d812 | 2351 | new_data_offset = data_offset; |
534f5432 N |
2352 | else |
2353 | new_data_offset = choose_offset(sd->data_offset - before, | |
2354 | sd->data_offset, | |
2355 | sd->data_offset - before, | |
2356 | sd->data_offset - min); | |
19ceb16d N |
2357 | } |
2358 | } | |
a6a78630 N |
2359 | err = sysfs_set_num(sra, sd, "new_offset", new_data_offset); |
2360 | if (err < 0 && errno == E2BIG) { | |
2361 | /* try again after increasing data size to max */ | |
2362 | err = sysfs_set_num(sra, sd, "size", 0); | |
2363 | if (err < 0 && errno == EINVAL && | |
2364 | !(sd->disk.state & (1<<MD_DISK_SYNC))) { | |
2365 | /* some kernels have a bug where you cannot | |
2366 | * use '0' on spare devices. */ | |
2367 | sysfs_set_num(sra, sd, "size", | |
2368 | (sra->component_size + after)/2); | |
2369 | } | |
2370 | err = sysfs_set_num(sra, sd, "new_offset", | |
2371 | new_data_offset); | |
2372 | } | |
2373 | if (err < 0) { | |
d7e1f52b N |
2374 | if (errno == E2BIG && data_offset != INVALID_SECTORS) { |
2375 | pr_err("data-offset is too big for %s\n", | |
2376 | dn); | |
2377 | goto release; | |
2378 | } | |
9ad2a640 N |
2379 | if (sd == sra->devs && |
2380 | (errno == ENOENT || errno == E2BIG)) | |
2381 | /* Early kernel, no 'new_offset' file, | |
2382 | * or kernel doesn't like us. | |
93f174b9 N |
2383 | * For RAID5/6 this is not fatal |
2384 | */ | |
2385 | return 1; | |
ed503f89 | 2386 | pr_err("Cannot set new_offset for %s\n", |
19ceb16d N |
2387 | dn); |
2388 | break; | |
2389 | } | |
2390 | } | |
13bbb145 N |
2391 | return err; |
2392 | release: | |
2393 | return -1; | |
2394 | } | |
2395 | ||
2396 | static int raid10_reshape(char *container, int fd, char *devname, | |
2397 | struct supertype *st, struct mdinfo *info, | |
2398 | struct reshape *reshape, | |
2399 | unsigned long long data_offset, | |
2400 | int force, int verbose) | |
2401 | { | |
2402 | /* Changing raid_disks, layout, chunksize or possibly | |
2403 | * just data_offset for a RAID10. | |
2404 | * We must always change data_offset. We change by at least | |
89ecd3cf | 2405 | * ->min_offset_change which is the largest of the old and new |
13bbb145 N |
2406 | * chunk sizes. |
2407 | * If raid_disks is increasing, then data_offset must decrease | |
2408 | * by at least this copy size. | |
2409 | * If raid_disks is unchanged, data_offset must increase or | |
89ecd3cf | 2410 | * decrease by at least min_offset_change but preferably by much more. |
13bbb145 N |
2411 | * We choose half of the available space. |
2412 | * If raid_disks is decreasing, data_offset must increase by | |
89ecd3cf | 2413 | * at least min_offset_change. To allow of this, component_size |
13bbb145 N |
2414 | * must be decreased by the same amount. |
2415 | * | |
2416 | * So we calculate the required minimum and direction, possibly | |
2417 | * reduce the component_size, then iterate through the devices | |
2418 | * and set the new_data_offset. | |
2419 | * If that all works, we set chunk_size, layout, raid_disks, and start | |
2420 | * 'reshape' | |
2421 | */ | |
2422 | struct mdinfo *sra; | |
2423 | unsigned long long min; | |
2424 | int err = 0; | |
2425 | ||
2426 | sra = sysfs_read(fd, NULL, | |
2427 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK | |
2428 | ); | |
2429 | if (!sra) { | |
ed503f89 | 2430 | pr_err("%s: Cannot get array details from sysfs\n", |
13bbb145 N |
2431 | devname); |
2432 | goto release; | |
2433 | } | |
89ecd3cf | 2434 | min = reshape->min_offset_change; |
13bbb145 N |
2435 | |
2436 | if (info->delta_disks) | |
2437 | sysfs_set_str(sra, NULL, "reshape_direction", | |
2438 | info->delta_disks < 0 ? "backwards" : "forwards"); | |
2439 | if (info->delta_disks < 0 && | |
89ecd3cf | 2440 | info->space_after < min) { |
13bbb145 N |
2441 | int rv = sysfs_set_num(sra, NULL, "component_size", |
2442 | (sra->component_size - | |
89ecd3cf | 2443 | min)/2); |
13bbb145 | 2444 | if (rv) { |
ed503f89 | 2445 | pr_err("cannot reduce component size\n"); |
13bbb145 N |
2446 | goto release; |
2447 | } | |
2448 | } | |
50a4962f | 2449 | err = set_new_data_offset(sra, st, devname, info->delta_disks, data_offset, |
13bbb145 | 2450 | min); |
93f174b9 N |
2451 | if (err == 1) { |
2452 | pr_err("Cannot set new_data_offset: RAID10 reshape not\n"); | |
2453 | cont_err("supported on this kernel\n"); | |
2454 | err = -1; | |
2455 | } | |
13bbb145 N |
2456 | if (err < 0) |
2457 | goto release; | |
2458 | ||
ee2429e0 | 2459 | if (!err && sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0) |
19ceb16d N |
2460 | err = errno; |
2461 | if (!err && sysfs_set_num(sra, NULL, "layout", reshape->after.layout) < 0) | |
2462 | err = errno; | |
2463 | if (!err && sysfs_set_num(sra, NULL, "raid_disks", | |
2464 | info->array.raid_disks + info->delta_disks) < 0) | |
2465 | err = errno; | |
2466 | if (!err && sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0) | |
2467 | err = errno; | |
2468 | if (err) { | |
ed503f89 | 2469 | pr_err("Cannot set array shape for %s\n", |
d33f1518 N |
2470 | devname); |
2471 | if (err == EBUSY && | |
2472 | (info->array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
2473 | cont_err(" Bitmap must be removed before" | |
2474 | " shape can be changed\n"); | |
2475 | goto release; | |
19ceb16d N |
2476 | } |
2477 | sysfs_free(sra); | |
2478 | return 0; | |
2479 | release: | |
2480 | sysfs_free(sra); | |
2481 | return 1; | |
2482 | } | |
2483 | ||
ee2429e0 N |
2484 | static void get_space_after(int fd, struct supertype *st, struct mdinfo *info) |
2485 | { | |
2486 | struct mdinfo *sra, *sd; | |
f3f09a52 LD |
2487 | /* Initialisation to silence compiler warning */ |
2488 | unsigned long long min_space_before = 0, min_space_after = 0; | |
ee2429e0 N |
2489 | int first = 1; |
2490 | ||
4dd2df09 | 2491 | sra = sysfs_read(fd, NULL, GET_DEVS); |
ee2429e0 N |
2492 | if (!sra) |
2493 | return; | |
2494 | for (sd = sra->devs; sd; sd = sd->next) { | |
2495 | char *dn; | |
2496 | int dfd; | |
2497 | struct supertype *st2; | |
2498 | struct mdinfo info2; | |
2499 | ||
2500 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
2501 | continue; | |
2502 | dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
2503 | dfd = dev_open(dn, O_RDONLY); | |
2504 | if (dfd < 0) | |
2505 | break; | |
2506 | st2 = dup_super(st); | |
2507 | if (st2->ss->load_super(st2,dfd, NULL)) { | |
2508 | close(dfd); | |
2509 | free(st2); | |
2510 | break; | |
2511 | } | |
2512 | close(dfd); | |
2513 | st2->ss->getinfo_super(st2, &info2, NULL); | |
2514 | st2->ss->free_super(st2); | |
2515 | free(st2); | |
2516 | if (first || | |
2517 | min_space_before > info2.space_before) | |
2518 | min_space_before = info2.space_before; | |
2519 | if (first || | |
2520 | min_space_after > info2.space_after) | |
2521 | min_space_after = info2.space_after; | |
2522 | first = 0; | |
2523 | } | |
2524 | if (sd == NULL && !first) { | |
2525 | info->space_after = min_space_after; | |
2526 | info->space_before = min_space_before; | |
2527 | } | |
2528 | sysfs_free(sra); | |
2529 | } | |
2530 | ||
434d167e N |
2531 | static void update_cache_size(char *container, struct mdinfo *sra, |
2532 | struct mdinfo *info, | |
2533 | int disks, unsigned long long blocks) | |
2534 | { | |
2535 | /* Check that the internal stripe cache is | |
2536 | * large enough, or it won't work. | |
2537 | * It must hold at least 4 stripes of the larger | |
2538 | * chunk size | |
2539 | */ | |
2540 | unsigned long cache; | |
2541 | cache = max(info->array.chunk_size, info->new_chunk); | |
2542 | cache *= 4; /* 4 stripes minimum */ | |
2543 | cache /= 512; /* convert to sectors */ | |
2544 | /* make sure there is room for 'blocks' with a bit to spare */ | |
2545 | if (cache < 16 + blocks / disks) | |
2546 | cache = 16 + blocks / disks; | |
2547 | cache /= (4096/512); /* Covert from sectors to pages */ | |
2548 | ||
2549 | if (sra->cache_size < cache) | |
2550 | subarray_set_num(container, sra, "stripe_cache_size", | |
2551 | cache+1); | |
2552 | } | |
2553 | ||
77afa056 N |
2554 | static int impose_reshape(struct mdinfo *sra, |
2555 | struct mdinfo *info, | |
2556 | struct supertype *st, | |
2557 | int fd, | |
2558 | int restart, | |
2559 | char *devname, char *container, | |
2560 | struct reshape *reshape) | |
2561 | { | |
2562 | struct mdu_array_info_s array; | |
2563 | ||
2564 | sra->new_chunk = info->new_chunk; | |
2565 | ||
2566 | if (restart) { | |
2567 | /* for external metadata checkpoint saved by mdmon can be lost | |
2568 | * or missed /due to e.g. crash/. Check if md is not during | |
2569 | * restart farther than metadata points to. | |
2570 | * If so, this means metadata information is obsolete. | |
2571 | */ | |
2572 | if (st->ss->external) | |
2573 | verify_reshape_position(info, reshape->level); | |
2574 | sra->reshape_progress = info->reshape_progress; | |
2575 | } else { | |
2576 | sra->reshape_progress = 0; | |
2577 | if (reshape->after.data_disks < reshape->before.data_disks) | |
2578 | /* start from the end of the new array */ | |
2579 | sra->reshape_progress = (sra->component_size | |
2580 | * reshape->after.data_disks); | |
2581 | } | |
2582 | ||
2583 | ioctl(fd, GET_ARRAY_INFO, &array); | |
2584 | if (info->array.chunk_size == info->new_chunk && | |
2585 | reshape->before.layout == reshape->after.layout && | |
2586 | st->ss->external == 0) { | |
2587 | /* use SET_ARRAY_INFO but only if reshape hasn't started */ | |
2588 | array.raid_disks = reshape->after.data_disks + reshape->parity; | |
2589 | if (!restart && | |
2590 | ioctl(fd, SET_ARRAY_INFO, &array) != 0) { | |
2591 | int err = errno; | |
2592 | ||
2593 | pr_err("Cannot set device shape for %s: %s\n", | |
2594 | devname, strerror(errno)); | |
2595 | ||
2596 | if (err == EBUSY && | |
2597 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
2598 | cont_err("Bitmap must be removed before" | |
2599 | " shape can be changed\n"); | |
2600 | ||
2601 | goto release; | |
2602 | } | |
2603 | } else if (!restart) { | |
2604 | /* set them all just in case some old 'new_*' value | |
2605 | * persists from some earlier problem. | |
2606 | */ | |
2607 | int err = 0; | |
2608 | if (sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0) | |
2609 | err = errno; | |
2610 | if (!err && sysfs_set_num(sra, NULL, "layout", | |
2611 | reshape->after.layout) < 0) | |
2612 | err = errno; | |
2613 | if (!err && subarray_set_num(container, sra, "raid_disks", | |
2614 | reshape->after.data_disks + | |
2615 | reshape->parity) < 0) | |
2616 | err = errno; | |
2617 | if (err) { | |
2618 | pr_err("Cannot set device shape for %s\n", | |
2619 | devname); | |
2620 | ||
2621 | if (err == EBUSY && | |
2622 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
2623 | cont_err("Bitmap must be removed before" | |
2624 | " shape can be changed\n"); | |
2625 | goto release; | |
2626 | } | |
2627 | } | |
2628 | return 0; | |
2629 | release: | |
2630 | return -1; | |
2631 | } | |
2632 | ||
97e3a6a0 N |
2633 | static int impose_level(int fd, int level, char *devname, int verbose) |
2634 | { | |
2635 | char *c; | |
2636 | struct mdu_array_info_s array; | |
2637 | struct mdinfo info; | |
2638 | sysfs_init(&info, fd, NULL); | |
2639 | ||
2640 | ioctl(fd, GET_ARRAY_INFO, &array); | |
2641 | if (level == 0 && | |
2642 | (array.level >= 4 && array.level <= 6)) { | |
2643 | /* To convert to RAID0 we need to fail and | |
2644 | * remove any non-data devices. */ | |
2645 | int found = 0; | |
2646 | int d; | |
2647 | int data_disks = array.raid_disks - 1; | |
2648 | if (array.level == 6) | |
2649 | data_disks -= 1; | |
2650 | if (array.level == 5 && | |
2651 | array.layout != ALGORITHM_PARITY_N) | |
2652 | return -1; | |
2653 | if (array.level == 6 && | |
2654 | array.layout != ALGORITHM_PARITY_N_6) | |
2655 | return -1; | |
2656 | sysfs_set_str(&info, NULL,"sync_action", "idle"); | |
2657 | /* First remove any spares so no recovery starts */ | |
2658 | for (d = 0, found = 0; | |
2659 | d < MAX_DISKS && found < array.nr_disks; | |
2660 | d++) { | |
2661 | mdu_disk_info_t disk; | |
2662 | disk.number = d; | |
2663 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
2664 | continue; | |
2665 | if (disk.major == 0 && disk.minor == 0) | |
2666 | continue; | |
2667 | found++; | |
2668 | if ((disk.state & (1 << MD_DISK_ACTIVE)) | |
2669 | && disk.raid_disk < data_disks) | |
2670 | /* keep this */ | |
2671 | continue; | |
2672 | ioctl(fd, HOT_REMOVE_DISK, | |
2673 | makedev(disk.major, disk.minor)); | |
2674 | } | |
2675 | /* Now fail anything left */ | |
2676 | ioctl(fd, GET_ARRAY_INFO, &array); | |
2677 | for (d = 0, found = 0; | |
2678 | d < MAX_DISKS && found < array.nr_disks; | |
2679 | d++) { | |
2680 | int cnt; | |
2681 | mdu_disk_info_t disk; | |
2682 | disk.number = d; | |
2683 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
2684 | continue; | |
2685 | if (disk.major == 0 && disk.minor == 0) | |
2686 | continue; | |
2687 | found++; | |
2688 | if ((disk.state & (1 << MD_DISK_ACTIVE)) | |
2689 | && disk.raid_disk < data_disks) | |
2690 | /* keep this */ | |
2691 | continue; | |
2692 | ioctl(fd, SET_DISK_FAULTY, | |
2693 | makedev(disk.major, disk.minor)); | |
2694 | cnt = 5; | |
2695 | while (ioctl(fd, HOT_REMOVE_DISK, | |
2696 | makedev(disk.major, disk.minor)) < 0 | |
2697 | && errno == EBUSY | |
2698 | && cnt--) { | |
2699 | usleep(10000); | |
2700 | } | |
2701 | } | |
2702 | } | |
2703 | c = map_num(pers, level); | |
2704 | if (c) { | |
2705 | int err = sysfs_set_str(&info, NULL, "level", c); | |
2706 | if (err) { | |
2707 | err = errno; | |
2708 | pr_err("%s: could not set level to %s\n", | |
2709 | devname, c); | |
2710 | if (err == EBUSY && | |
2711 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
2712 | cont_err("Bitmap must be removed" | |
2713 | " before level can be changed\n"); | |
2714 | return err; | |
2715 | } | |
2716 | if (verbose >= 0) | |
2717 | pr_err("level of %s changed to %s\n", | |
2718 | devname, c); | |
2719 | } | |
2720 | return 0; | |
2721 | } | |
2722 | ||
5da9ab98 N |
2723 | static int reshape_array(char *container, int fd, char *devname, |
2724 | struct supertype *st, struct mdinfo *info, | |
e2e53a2d | 2725 | int force, struct mddev_dev *devlist, |
19ceb16d | 2726 | unsigned long long data_offset, |
ba728be7 | 2727 | char *backup_file, int verbose, int forked, |
b76b30e0 | 2728 | int restart, int freeze_reshape) |
5da9ab98 N |
2729 | { |
2730 | struct reshape reshape; | |
2731 | int spares_needed; | |
2732 | char *msg; | |
2733 | int orig_level = UnSet; | |
434d167e | 2734 | int odisks; |
1f9b0e28 | 2735 | int delayed; |
7bc71196 | 2736 | |
5da9ab98 N |
2737 | struct mdu_array_info_s array; |
2738 | char *c; | |
e86c9dd6 | 2739 | |
e2e53a2d N |
2740 | struct mddev_dev *dv; |
2741 | int added_disks; | |
2742 | ||
d152f53e JS |
2743 | int *fdlist = NULL; |
2744 | unsigned long long *offsets = NULL; | |
5da9ab98 N |
2745 | int d; |
2746 | int nrdisks; | |
2747 | int err; | |
da8100ca | 2748 | unsigned long blocks; |
5da9ab98 N |
2749 | unsigned long long array_size; |
2750 | int done; | |
cf6ac177 | 2751 | struct mdinfo *sra = NULL; |
7bc71196 | 2752 | |
9468aeac N |
2753 | /* when reshaping a RAID0, the component_size might be zero. |
2754 | * So try to fix that up. | |
2755 | */ | |
2756 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0) { | |
2757 | dprintf("Cannot get array information.\n"); | |
2758 | goto release; | |
2759 | } | |
2760 | if (array.level == 0 && info->component_size == 0) { | |
2761 | get_dev_size(fd, NULL, &array_size); | |
2762 | info->component_size = array_size / array.raid_disks; | |
2763 | } | |
2764 | ||
ee2429e0 N |
2765 | if (array.level == 10) |
2766 | /* Need space_after info */ | |
2767 | get_space_after(fd, st, info); | |
2768 | ||
3cb2aed2 N |
2769 | if (info->reshape_active) { |
2770 | int new_level = info->new_level; | |
2771 | info->new_level = UnSet; | |
ce4783d3 N |
2772 | if (info->delta_disks > 0) |
2773 | info->array.raid_disks -= info->delta_disks; | |
3cb2aed2 N |
2774 | msg = analyse_change(info, &reshape); |
2775 | info->new_level = new_level; | |
ce4783d3 N |
2776 | if (info->delta_disks > 0) |
2777 | info->array.raid_disks += info->delta_disks; | |
fcdfb814 AK |
2778 | if (!restart) |
2779 | /* Make sure the array isn't read-only */ | |
2780 | ioctl(fd, RESTART_ARRAY_RW, 0); | |
3cb2aed2 N |
2781 | } else |
2782 | msg = analyse_change(info, &reshape); | |
5da9ab98 | 2783 | if (msg) { |
e7b84f9d | 2784 | pr_err("%s\n", msg); |
631d7405 | 2785 | goto release; |
5da9ab98 | 2786 | } |
817ed7d6 N |
2787 | if (restart && |
2788 | (reshape.level != info->array.level || | |
2789 | reshape.before.layout != info->array.layout || | |
384e9be1 | 2790 | reshape.before.data_disks + reshape.parity |
ce4783d3 | 2791 | != info->array.raid_disks - max(0, info->delta_disks))) { |
e7b84f9d | 2792 | pr_err("reshape info is not in native format -" |
20a40eca N |
2793 | " cannot continue.\n"); |
2794 | goto release; | |
2795 | } | |
a93f87ee | 2796 | |
e1dd332a AK |
2797 | if (st->ss->external && restart && (info->reshape_progress == 0)) { |
2798 | /* When reshape is restarted from '0', very begin of array | |
2799 | * it is possible that for external metadata reshape and array | |
2800 | * configuration doesn't happen. | |
2801 | * Check if md has the same opinion, and reshape is restarted | |
2802 | * from 0. If so, this is regular reshape start after reshape | |
2803 | * switch in metadata to next array only. | |
2804 | */ | |
2805 | if ((verify_reshape_position(info, reshape.level) >= 0) && | |
2806 | (info->reshape_progress == 0)) | |
2807 | restart = 0; | |
2808 | } | |
a93f87ee N |
2809 | if (restart) { |
2810 | /* reshape already started. just skip to monitoring the reshape */ | |
2811 | if (reshape.backup_blocks == 0) | |
2812 | return 0; | |
8ecf12b9 N |
2813 | if (restart & RESHAPE_NO_BACKUP) |
2814 | return 0; | |
a93f87ee N |
2815 | goto started; |
2816 | } | |
a9c3e78f AK |
2817 | /* The container is frozen but the array may not be. |
2818 | * So freeze the array so spares don't get put to the wrong use | |
2819 | * FIXME there should probably be a cleaner separation between | |
2820 | * freeze_array and freeze_container. | |
2821 | */ | |
2822 | sysfs_freeze_array(info); | |
e06c4e59 | 2823 | /* Check we have enough spares to not be degraded */ |
e2e53a2d N |
2824 | added_disks = 0; |
2825 | for (dv = devlist; dv ; dv=dv->next) | |
2826 | added_disks++; | |
5da9ab98 N |
2827 | spares_needed = max(reshape.before.data_disks, |
2828 | reshape.after.data_disks) | |
2829 | + reshape.parity - array.raid_disks; | |
7bc71196 | 2830 | |
88c1a083 | 2831 | if (!force && |
e2e53a2d N |
2832 | info->new_level > 1 && info->array.level > 1 && |
2833 | spares_needed > info->array.spare_disks + added_disks) { | |
e7b84f9d N |
2834 | pr_err("Need %d spare%s to avoid degraded array," |
2835 | " and only have %d.\n" | |
2836 | " Use --force to over-ride this check.\n", | |
2837 | spares_needed, | |
2838 | spares_needed == 1 ? "" : "s", | |
2839 | info->array.spare_disks + added_disks); | |
631d7405 | 2840 | goto release; |
7bc71196 | 2841 | } |
e06c4e59 N |
2842 | /* Check we have enough spares to not fail */ |
2843 | spares_needed = max(reshape.before.data_disks, | |
2844 | reshape.after.data_disks) | |
2845 | - array.raid_disks; | |
2846 | if ((info->new_level > 1 || info->new_level == 0) && | |
e2e53a2d | 2847 | spares_needed > info->array.spare_disks +added_disks) { |
e7b84f9d N |
2848 | pr_err("Need %d spare%s to create working array," |
2849 | " and only have %d.\n", | |
2850 | spares_needed, | |
2851 | spares_needed == 1 ? "" : "s", | |
2852 | info->array.spare_disks + added_disks); | |
e06c4e59 N |
2853 | goto release; |
2854 | } | |
e86c9dd6 | 2855 | |
eae35f5c | 2856 | if (reshape.level != array.level) { |
97e3a6a0 N |
2857 | int err = impose_level(fd, reshape.level, devname, verbose); |
2858 | if (err) | |
631d7405 | 2859 | goto release; |
97e3a6a0 N |
2860 | info->new_layout = UnSet; /* after level change, |
2861 | * layout is meaningless */ | |
eae35f5c | 2862 | orig_level = array.level; |
3cd4e7c4 | 2863 | sysfs_freeze_array(info); |
e86c9dd6 | 2864 | |
16d4d84e AK |
2865 | if (reshape.level > 0 && st->ss->external) { |
2866 | /* make sure mdmon is aware of the new level */ | |
4dd2df09 | 2867 | if (mdmon_running(container)) |
78340e26 AK |
2868 | flush_mdmon(container); |
2869 | ||
4dd2df09 N |
2870 | if (!mdmon_running(container)) |
2871 | start_mdmon(container); | |
16d4d84e | 2872 | ping_monitor(container); |
4dd2df09 | 2873 | if (mdmon_running(container) && |
e919fb0a AK |
2874 | st->update_tail == NULL) |
2875 | st->update_tail = &st->updates; | |
16d4d84e | 2876 | } |
5da9ab98 | 2877 | } |
5da9ab98 N |
2878 | /* ->reshape_super might have chosen some spares from the |
2879 | * container that it wants to be part of the new array. | |
2880 | * We can collect them with ->container_content and give | |
2881 | * them to the kernel. | |
2882 | */ | |
2883 | if (st->ss->reshape_super && st->ss->container_content) { | |
2884 | char *subarray = strchr(info->text_version+1, '/')+1; | |
2885 | struct mdinfo *info2 = | |
2886 | st->ss->container_content(st, subarray); | |
2887 | struct mdinfo *d; | |
2888 | ||
2dd0d697 | 2889 | if (info2) { |
4dd2df09 | 2890 | sysfs_init(info2, fd, st->devnm); |
0d5ac3c6 N |
2891 | /* When increasing number of devices, we need to set |
2892 | * new raid_disks before adding these, or they might | |
2893 | * be rejected. | |
2894 | */ | |
2895 | if (reshape.backup_blocks && | |
2896 | reshape.after.data_disks > reshape.before.data_disks) | |
2897 | subarray_set_num(container, info2, "raid_disks", | |
2898 | reshape.after.data_disks + | |
2899 | reshape.parity); | |
5da9ab98 N |
2900 | for (d = info2->devs; d; d = d->next) { |
2901 | if (d->disk.state == 0 && | |
2902 | d->disk.raid_disk >= 0) { | |
2903 | /* This is a spare that wants to | |
2904 | * be part of the array. | |
2905 | */ | |
2906 | add_disk(fd, st, info2, d); | |
2907 | } | |
9860f271 | 2908 | } |
2dd0d697 AK |
2909 | sysfs_free(info2); |
2910 | } | |
5da9ab98 | 2911 | } |
e2e53a2d N |
2912 | /* We might have been given some devices to add to the |
2913 | * array. Now that the array has been changed to the right | |
2914 | * level and frozen, we can safely add them. | |
2915 | */ | |
2916 | if (devlist) | |
ba728be7 | 2917 | Manage_subdevs(devname, fd, devlist, verbose, |
11b391ec | 2918 | 0,NULL, 0); |
1686dc25 | 2919 | |
e09233d0 | 2920 | if (reshape.backup_blocks == 0 && data_offset != INVALID_SECTORS) |
8876bf0b | 2921 | reshape.backup_blocks = reshape.before.data_disks * info->array.chunk_size/512; |
b4f8e38b | 2922 | if (reshape.backup_blocks == 0) { |
5da9ab98 N |
2923 | /* No restriping needed, but we might need to impose |
2924 | * some more changes: layout, raid_disks, chunk_size | |
e86c9dd6 | 2925 | */ |
24aebf3a KW |
2926 | /* read current array info */ |
2927 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0) { | |
83732c28 | 2928 | dprintf("Cannot get array information.\n"); |
24aebf3a KW |
2929 | goto release; |
2930 | } | |
2931 | /* compare current array info with new values and if | |
2932 | * it is different update them to new */ | |
5da9ab98 | 2933 | if (info->new_layout != UnSet && |
24aebf3a KW |
2934 | info->new_layout != array.layout) { |
2935 | array.layout = info->new_layout; | |
2936 | if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) { | |
e7b84f9d | 2937 | pr_err("failed to set new layout\n"); |
631d7405 | 2938 | goto release; |
ba728be7 | 2939 | } else if (verbose >= 0) |
5da9ab98 | 2940 | printf("layout for %s set to %d\n", |
24aebf3a | 2941 | devname, array.layout); |
5da9ab98 N |
2942 | } |
2943 | if (info->delta_disks != UnSet && | |
24aebf3a KW |
2944 | info->delta_disks != 0 && |
2945 | array.raid_disks != (info->array.raid_disks + info->delta_disks)) { | |
2946 | array.raid_disks += info->delta_disks; | |
2947 | if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) { | |
e7b84f9d | 2948 | pr_err("failed to set raid disks\n"); |
631d7405 | 2949 | goto release; |
ba728be7 | 2950 | } else if (verbose >= 0) { |
5da9ab98 | 2951 | printf("raid_disks for %s set to %d\n", |
24aebf3a KW |
2952 | devname, array.raid_disks); |
2953 | } | |
5da9ab98 N |
2954 | } |
2955 | if (info->new_chunk != 0 && | |
24aebf3a | 2956 | info->new_chunk != array.chunk_size) { |
5da9ab98 N |
2957 | if (sysfs_set_num(info, NULL, |
2958 | "chunk_size", info->new_chunk) != 0) { | |
e7b84f9d | 2959 | pr_err("failed to set chunk size\n"); |
631d7405 | 2960 | goto release; |
ba728be7 | 2961 | } else if (verbose >= 0) |
5da9ab98 | 2962 | printf("chunk size for %s set to %d\n", |
24aebf3a | 2963 | devname, array.chunk_size); |
4725bc31 | 2964 | } |
e35b189b | 2965 | unfreeze(st); |
631d7405 | 2966 | return 0; |
5da9ab98 | 2967 | } |
19678e53 | 2968 | |
5da9ab98 N |
2969 | /* |
2970 | * There are three possibilities. | |
2971 | * 1/ The array will shrink. | |
2972 | * We need to ensure the reshape will pause before reaching | |
2973 | * the 'critical section'. We also need to fork and wait for | |
24daa16f | 2974 | * that to happen. When it does we |
5da9ab98 N |
2975 | * suspend/backup/complete/unfreeze |
2976 | * | |
2977 | * 2/ The array will not change size. | |
2978 | * This requires that we keep a backup of a sliding window | |
2979 | * so that we can restore data after a crash. So we need | |
2980 | * to fork and monitor progress. | |
2981 | * In future we will allow the data_offset to change, so | |
2982 | * a sliding backup becomes unnecessary. | |
2983 | * | |
2984 | * 3/ The array will grow. This is relatively easy. | |
2985 | * However the kernel's restripe routines will cheerfully | |
2986 | * overwrite some early data before it is safe. So we | |
2987 | * need to make a backup of the early parts of the array | |
2988 | * and be ready to restore it if rebuild aborts very early. | |
2989 | * For externally managed metadata, we still need a forked | |
2990 | * child to monitor the reshape and suspend IO over the region | |
2991 | * that is being reshaped. | |
2992 | * | |
2993 | * We backup data by writing it to one spare, or to a | |
2994 | * file which was given on command line. | |
2995 | * | |
2996 | * In each case, we first make sure that storage is available | |
2997 | * for the required backup. | |
2998 | * Then we: | |
2999 | * - request the shape change. | |
3000 | * - fork to handle backup etc. | |
3001 | */ | |
5da9ab98 N |
3002 | /* Check that we can hold all the data */ |
3003 | get_dev_size(fd, NULL, &array_size); | |
3004 | if (reshape.new_size < (array_size/512)) { | |
e7b84f9d N |
3005 | pr_err("this change will reduce the size of the array.\n" |
3006 | " use --grow --array-size first to truncate array.\n" | |
3007 | " e.g. mdadm --grow %s --array-size %llu\n", | |
3008 | devname, reshape.new_size/2); | |
5da9ab98 N |
3009 | goto release; |
3010 | } | |
7236ee7a | 3011 | |
19ceb16d | 3012 | if (array.level == 10) { |
033d0929 | 3013 | /* Reshaping RAID10 does not require any data backup by |
19ceb16d N |
3014 | * user-space. Instead it requires that the data_offset |
3015 | * is changed to avoid the need for backup. | |
3016 | * So this is handled very separately | |
3017 | */ | |
3018 | if (restart) | |
3019 | /* Nothing to do. */ | |
3020 | return 0; | |
3021 | return raid10_reshape(container, fd, devname, st, info, | |
3022 | &reshape, data_offset, | |
3023 | force, verbose); | |
3024 | } | |
4dd2df09 | 3025 | sra = sysfs_read(fd, NULL, |
3656edcd | 3026 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK| |
5da9ab98 | 3027 | GET_CACHE); |
5da9ab98 | 3028 | if (!sra) { |
e7b84f9d | 3029 | pr_err("%s: Cannot get array details from sysfs\n", |
5da9ab98 | 3030 | devname); |
5da9ab98 N |
3031 | goto release; |
3032 | } | |
7236ee7a | 3033 | |
8192902f | 3034 | if (!backup_file) |
199f1a1f N |
3035 | switch(set_new_data_offset(sra, st, devname, |
3036 | reshape.after.data_disks - reshape.before.data_disks, | |
8192902f N |
3037 | data_offset, |
3038 | reshape.min_offset_change)) { | |
63c12c89 N |
3039 | case -1: |
3040 | goto release; | |
3041 | case 0: | |
3042 | /* Updated data_offset, so it's easy now */ | |
3043 | update_cache_size(container, sra, info, | |
3044 | min(reshape.before.data_disks, | |
3045 | reshape.after.data_disks), | |
3046 | reshape.backup_blocks); | |
3047 | ||
3048 | /* Right, everything seems fine. Let's kick things off. | |
3049 | */ | |
3050 | sync_metadata(st); | |
3051 | ||
3052 | if (impose_reshape(sra, info, st, fd, restart, | |
3053 | devname, container, &reshape) < 0) | |
3054 | goto release; | |
3055 | if (sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0) { | |
3056 | pr_err("Failed to initiate reshape!\n"); | |
3057 | goto release; | |
3058 | } | |
97e3a6a0 N |
3059 | if (info->new_level == reshape.level) |
3060 | return 0; | |
3061 | /* need to adjust level when reshape completes */ | |
3062 | switch(fork()) { | |
3063 | case -1: /* ignore error, but don't wait */ | |
3064 | return 0; | |
3065 | default: /* parent */ | |
3066 | return 0; | |
3067 | case 0: | |
3068 | map_fork(); | |
3069 | break; | |
3070 | } | |
3071 | wait_reshape(sra); | |
3072 | impose_level(fd, info->new_level, devname, verbose); | |
63c12c89 N |
3073 | |
3074 | return 0; | |
3075 | case 1: /* Couldn't set data_offset, try the old way */ | |
3076 | if (data_offset != INVALID_SECTORS) { | |
3077 | pr_err("Cannot update data_offset on this array\n"); | |
3078 | goto release; | |
3079 | } | |
3080 | break; | |
3081 | } | |
3082 | ||
8ecf12b9 | 3083 | started: |
5da9ab98 N |
3084 | /* Decide how many blocks (sectors) for a reshape |
3085 | * unit. The number we have so far is just a minimum | |
3086 | */ | |
b4f8e38b | 3087 | blocks = reshape.backup_blocks; |
24daa16f | 3088 | if (reshape.before.data_disks == |
5da9ab98 N |
3089 | reshape.after.data_disks) { |
3090 | /* Make 'blocks' bigger for better throughput, but | |
3091 | * not so big that we reject it below. | |
3092 | * Try for 16 megabytes | |
3093 | */ | |
3094 | while (blocks * 32 < sra->component_size && | |
3095 | blocks < 16*1024*2) | |
3096 | blocks *= 2; | |
3097 | } else | |
e7b84f9d | 3098 | pr_err("Need to backup %luK of critical " |
5da9ab98 N |
3099 | "section..\n", blocks/2); |
3100 | ||
3101 | if (blocks >= sra->component_size/2) { | |
e7b84f9d | 3102 | pr_err("%s: Something wrong" |
5da9ab98 N |
3103 | " - reshape aborted\n", |
3104 | devname); | |
5da9ab98 N |
3105 | goto release; |
3106 | } | |
7236ee7a | 3107 | |
5da9ab98 N |
3108 | /* Now we need to open all these devices so we can read/write. |
3109 | */ | |
b8b286a6 N |
3110 | nrdisks = max(reshape.before.data_disks, |
3111 | reshape.after.data_disks) + reshape.parity | |
3112 | + sra->array.spare_disks; | |
503975b9 N |
3113 | fdlist = xcalloc((1+nrdisks), sizeof(int)); |
3114 | offsets = xcalloc((1+nrdisks), sizeof(offsets[0])); | |
e380d3be | 3115 | |
b8b286a6 N |
3116 | odisks = reshape.before.data_disks + reshape.parity; |
3117 | d = reshape_prepare_fdlist(devname, sra, odisks, | |
5da9ab98 N |
3118 | nrdisks, blocks, backup_file, |
3119 | fdlist, offsets); | |
3120 | if (d < 0) { | |
5da9ab98 N |
3121 | goto release; |
3122 | } | |
13c37ad3 AK |
3123 | if ((st->ss->manage_reshape == NULL) || |
3124 | (st->ss->recover_backup == NULL)) { | |
3125 | if (backup_file == NULL) { | |
3126 | if (reshape.after.data_disks <= | |
3127 | reshape.before.data_disks) { | |
e7b84f9d | 3128 | pr_err("%s: Cannot grow - " |
13c37ad3 AK |
3129 | "need backup-file\n", devname); |
3130 | goto release; | |
3131 | } else if (sra->array.spare_disks == 0) { | |
e7b84f9d | 3132 | pr_err("%s: Cannot grow - " |
13c37ad3 AK |
3133 | "need a spare or backup-file to backup " |
3134 | "critical section\n", devname); | |
3135 | goto release; | |
3136 | } | |
3137 | } else { | |
3138 | if (!reshape_open_backup_file(backup_file, fd, devname, | |
3139 | (signed)blocks, | |
3140 | fdlist+d, offsets+d, | |
3141 | restart)) { | |
3142 | goto release; | |
3143 | } | |
3144 | d++; | |
e86c9dd6 | 3145 | } |
5da9ab98 | 3146 | } |
7236ee7a | 3147 | |
434d167e N |
3148 | update_cache_size(container, sra, info, |
3149 | min(reshape.before.data_disks, reshape.after.data_disks), | |
3150 | blocks); | |
5da9ab98 N |
3151 | |
3152 | /* Right, everything seems fine. Let's kick things off. | |
3153 | * If only changing raid_disks, use ioctl, else use | |
3154 | * sysfs. | |
3155 | */ | |
3156 | sync_metadata(st); | |
3157 | ||
77afa056 N |
3158 | if (impose_reshape(sra, info, st, fd, restart, |
3159 | devname, container, &reshape) < 0) | |
3160 | goto release; | |
e86c9dd6 | 3161 | |
27a1e5b5 N |
3162 | err = start_reshape(sra, restart, reshape.before.data_disks, |
3163 | reshape.after.data_disks); | |
fab32c97 | 3164 | if (err) { |
e7b84f9d N |
3165 | pr_err("Cannot %s reshape for %s\n", |
3166 | restart ? "continue" : "start", | |
3167 | devname); | |
fab32c97 AK |
3168 | goto release; |
3169 | } | |
a93f87ee N |
3170 | if (restart) |
3171 | sysfs_set_str(sra, NULL, "array_state", "active"); | |
b76b30e0 AK |
3172 | if (freeze_reshape) { |
3173 | free(fdlist); | |
3174 | free(offsets); | |
3175 | sysfs_free(sra); | |
e7b84f9d | 3176 | pr_err("Reshape has to be continued from" |
59ab9f54 | 3177 | " location %llu when root filesystem has been mounted.\n", |
b76b30e0 AK |
3178 | sra->reshape_progress); |
3179 | return 1; | |
3180 | } | |
5da9ab98 N |
3181 | |
3182 | /* Now we just need to kick off the reshape and watch, while | |
3183 | * handling backups of the data... | |
3184 | * This is all done by a forked background process. | |
3185 | */ | |
3186 | switch(forked ? 0 : fork()) { | |
6b2d630c | 3187 | case -1: |
e7b84f9d | 3188 | pr_err("Cannot run child to monitor reshape: %s\n", |
6b2d630c | 3189 | strerror(errno)); |
6b2d630c | 3190 | abort_reshape(sra); |
631d7405 | 3191 | goto release; |
6b2d630c | 3192 | default: |
d152f53e JS |
3193 | free(fdlist); |
3194 | free(offsets); | |
3195 | sysfs_free(sra); | |
6b2d630c | 3196 | return 0; |
5da9ab98 | 3197 | case 0: |
cc700db3 | 3198 | map_fork(); |
6b2d630c N |
3199 | break; |
3200 | } | |
5da9ab98 | 3201 | |
1f9b0e28 N |
3202 | /* If another array on the same devices is busy, the |
3203 | * reshape will wait for them. This would mean that | |
3204 | * the first section that we suspend will stay suspended | |
3205 | * for a long time. So check on that possibility | |
3206 | * by looking for "DELAYED" in /proc/mdstat, and if found, | |
3207 | * wait a while | |
3208 | */ | |
3209 | do { | |
3210 | struct mdstat_ent *mds, *m; | |
3211 | delayed = 0; | |
3212 | mds = mdstat_read(0, 0); | |
ae0dcfbd | 3213 | for (m = mds; m; m = m->next) |
4dd2df09 | 3214 | if (strcmp(m->devnm, sra->sys_name) == 0) { |
1f9b0e28 N |
3215 | if (m->resync && |
3216 | m->percent == RESYNC_DELAYED) | |
3217 | delayed = 1; | |
3218 | if (m->resync == 0) | |
3219 | /* Haven't started the reshape thread | |
3220 | * yet, wait a bit | |
3221 | */ | |
3222 | delayed = 2; | |
3223 | break; | |
3224 | } | |
3225 | free_mdstat(mds); | |
3226 | if (delayed == 1 && get_linux_version() < 3007000) { | |
3227 | pr_err("Reshape is delayed, but cannot wait carefully with this kernel.\n" | |
3228 | " You might experience problems until other reshapes complete.\n"); | |
3229 | delayed = 0; | |
3230 | } | |
3231 | if (delayed) | |
3232 | sleep(30 - (delayed-1) * 25); | |
3233 | } while (delayed); | |
3234 | ||
6b2d630c N |
3235 | close(fd); |
3236 | if (check_env("MDADM_GROW_VERIFY")) | |
3237 | fd = open(devname, O_RDONLY | O_DIRECT); | |
3238 | else | |
3239 | fd = -1; | |
3240 | mlockall(MCL_FUTURE); | |
5da9ab98 | 3241 | |
6b2d630c N |
3242 | if (st->ss->external) { |
3243 | /* metadata handler takes it from here */ | |
3244 | done = st->ss->manage_reshape( | |
3245 | fd, sra, &reshape, st, blocks, | |
3246 | fdlist, offsets, | |
3247 | d - odisks, fdlist+odisks, | |
3248 | offsets+odisks); | |
3249 | } else | |
3250 | done = child_monitor( | |
3251 | fd, sra, &reshape, st, blocks, | |
3252 | fdlist, offsets, | |
3253 | d - odisks, fdlist+odisks, | |
3254 | offsets+odisks); | |
3255 | ||
d152f53e JS |
3256 | free(fdlist); |
3257 | free(offsets); | |
3258 | ||
6b2d630c N |
3259 | if (backup_file && done) |
3260 | unlink(backup_file); | |
3261 | if (!done) { | |
3262 | abort_reshape(sra); | |
3263 | goto out; | |
3264 | } | |
1cbc5680 N |
3265 | |
3266 | if (!st->ss->external && | |
3267 | !(reshape.before.data_disks != reshape.after.data_disks | |
3268 | && info->custom_array_size) && | |
3269 | info->new_level == reshape.level && | |
3270 | !forked) { | |
3271 | /* no need to wait for the reshape to finish as | |
3272 | * there is nothing more to do. | |
3273 | */ | |
d152f53e | 3274 | sysfs_free(sra); |
1cbc5680 N |
3275 | exit(0); |
3276 | } | |
3277 | wait_reshape(sra); | |
3278 | ||
3279 | if (st->ss->external) { | |
3280 | /* Re-load the metadata as much could have changed */ | |
4dd2df09 | 3281 | int cfd = open_dev(st->container_devnm); |
1cbc5680 | 3282 | if (cfd >= 0) { |
78340e26 | 3283 | flush_mdmon(container); |
1cbc5680 N |
3284 | st->ss->free_super(st); |
3285 | st->ss->load_container(st, cfd, container); | |
3286 | close(cfd); | |
3287 | } | |
3288 | } | |
3289 | ||
6b2d630c N |
3290 | /* set new array size if required customer_array_size is used |
3291 | * by this metadata. | |
3292 | */ | |
3293 | if (reshape.before.data_disks != | |
3294 | reshape.after.data_disks && | |
54397ed9 AK |
3295 | info->custom_array_size) |
3296 | set_array_size(st, info, info->text_version); | |
582496b2 | 3297 | |
6b2d630c | 3298 | if (info->new_level != reshape.level) { |
97e3a6a0 N |
3299 | if (fd < 0) |
3300 | fd = open(devname, O_RDONLY); | |
3301 | impose_level(fd, info->new_level, devname, verbose); | |
3302 | close(fd); | |
e919fb0a AK |
3303 | if (info->new_level == 0) |
3304 | st->update_tail = NULL; | |
7236ee7a | 3305 | } |
6b2d630c | 3306 | out: |
d152f53e | 3307 | sysfs_free(sra); |
6b2d630c N |
3308 | if (forked) |
3309 | return 0; | |
e84f2c00 | 3310 | unfreeze(st); |
6b2d630c | 3311 | exit(0); |
e86c9dd6 | 3312 | |
6b2d630c | 3313 | release: |
d152f53e JS |
3314 | free(fdlist); |
3315 | free(offsets); | |
1cbc5680 | 3316 | if (orig_level != UnSet && sra) { |
7236ee7a N |
3317 | c = map_num(pers, orig_level); |
3318 | if (c && sysfs_set_str(sra, NULL, "level", c) == 0) | |
e7b84f9d | 3319 | pr_err("aborting level change\n"); |
7236ee7a | 3320 | } |
d152f53e | 3321 | sysfs_free(sra); |
9202b8eb N |
3322 | if (!forked) |
3323 | unfreeze(st); | |
631d7405 | 3324 | return 1; |
7236ee7a | 3325 | } |
e86c9dd6 | 3326 | |
9ad6f6e6 AK |
3327 | /* mdfd handle is passed to be closed in child process (after fork). |
3328 | */ | |
493f5dd6 | 3329 | int reshape_container(char *container, char *devname, |
9ad6f6e6 | 3330 | int mdfd, |
24daa16f | 3331 | struct supertype *st, |
5da9ab98 N |
3332 | struct mdinfo *info, |
3333 | int force, | |
3334 | char *backup_file, | |
ba728be7 | 3335 | int verbose, int restart, int freeze_reshape) |
5da9ab98 | 3336 | { |
1bb174ba | 3337 | struct mdinfo *cc = NULL; |
bcc9e9ed | 3338 | int rv = restart; |
4dd2df09 | 3339 | char last_devnm[32] = ""; |
1bb174ba | 3340 | |
d8eb27f7 | 3341 | /* component_size is not meaningful for a container, |
7ec0996c | 3342 | * so pass '0' meaning 'no change' |
d8eb27f7 | 3343 | */ |
493f5dd6 | 3344 | if (!restart && |
7ec0996c | 3345 | reshape_super(st, 0, info->new_level, |
5da9ab98 | 3346 | info->new_layout, info->new_chunk, |
41784c88 | 3347 | info->array.raid_disks, info->delta_disks, |
016e00f5 | 3348 | backup_file, devname, APPLY_METADATA_CHANGES, |
ba728be7 | 3349 | verbose)) { |
9e325442 | 3350 | unfreeze(st); |
5da9ab98 | 3351 | return 1; |
9e325442 | 3352 | } |
5da9ab98 N |
3353 | |
3354 | sync_metadata(st); | |
3355 | ||
1bb174ba AK |
3356 | /* ping monitor to be sure that update is on disk |
3357 | */ | |
3358 | ping_monitor(container); | |
5da9ab98 N |
3359 | |
3360 | switch (fork()) { | |
3361 | case -1: /* error */ | |
3362 | perror("Cannot fork to complete reshape\n"); | |
9e325442 | 3363 | unfreeze(st); |
5da9ab98 N |
3364 | return 1; |
3365 | default: /* parent */ | |
b76b30e0 AK |
3366 | if (!freeze_reshape) |
3367 | printf(Name ": multi-array reshape continues" | |
3368 | " in background\n"); | |
5da9ab98 N |
3369 | return 0; |
3370 | case 0: /* child */ | |
cc700db3 | 3371 | map_fork(); |
5da9ab98 N |
3372 | break; |
3373 | } | |
3374 | ||
9ad6f6e6 AK |
3375 | /* close unused handle in child process |
3376 | */ | |
3377 | if (mdfd > -1) | |
3378 | close(mdfd); | |
3379 | ||
1bb174ba AK |
3380 | while(1) { |
3381 | /* For each member array with reshape_active, | |
3382 | * we need to perform the reshape. | |
3383 | * We pick the first array that needs reshaping and | |
3384 | * reshape it. reshape_array() will re-read the metadata | |
3385 | * so the next time through a different array should be | |
3386 | * ready for reshape. | |
493f5dd6 N |
3387 | * It is possible that the 'different' array will not |
3388 | * be assembled yet. In that case we simple exit. | |
3389 | * When it is assembled, the mdadm which assembles it | |
3390 | * will take over the reshape. | |
1bb174ba AK |
3391 | */ |
3392 | struct mdinfo *content; | |
5da9ab98 N |
3393 | int fd; |
3394 | struct mdstat_ent *mdstat; | |
5da9ab98 | 3395 | char *adev; |
4dd2df09 | 3396 | int devid; |
5da9ab98 | 3397 | |
1bb174ba | 3398 | sysfs_free(cc); |
5da9ab98 | 3399 | |
1bb174ba AK |
3400 | cc = st->ss->container_content(st, NULL); |
3401 | ||
3402 | for (content = cc; content ; content = content->next) { | |
3403 | char *subarray; | |
3404 | if (!content->reshape_active) | |
3405 | continue; | |
3406 | ||
3407 | subarray = strchr(content->text_version+1, '/')+1; | |
4dd2df09 | 3408 | mdstat = mdstat_by_subdev(subarray, container); |
1bb174ba AK |
3409 | if (!mdstat) |
3410 | continue; | |
1ca90aa6 | 3411 | if (mdstat->active == 0) { |
4dd2df09 N |
3412 | pr_err("Skipping inactive array %s.\n", |
3413 | mdstat->devnm); | |
1ca90aa6 AK |
3414 | free_mdstat(mdstat); |
3415 | mdstat = NULL; | |
3416 | continue; | |
3417 | } | |
1bb174ba AK |
3418 | break; |
3419 | } | |
3420 | if (!content) | |
3421 | break; | |
5da9ab98 | 3422 | |
4dd2df09 N |
3423 | devid = devnm2devid(mdstat->devnm); |
3424 | adev = map_dev(major(devid), minor(devid), 0); | |
5da9ab98 | 3425 | if (!adev) |
1bb174ba AK |
3426 | adev = content->text_version; |
3427 | ||
4dd2df09 | 3428 | fd = open_dev(mdstat->devnm); |
97a3490c AK |
3429 | if (fd < 0) { |
3430 | printf(Name ": Device %s cannot be opened for reshape.", | |
3431 | adev); | |
3432 | break; | |
3433 | } | |
3434 | ||
4dd2df09 | 3435 | if (strcmp(last_devnm, mdstat->devnm) == 0) { |
2d04d7e5 AK |
3436 | /* Do not allow for multiple reshape_array() calls for |
3437 | * the same array. | |
3438 | * It can happen when reshape_array() returns without | |
3439 | * error, when reshape is not finished (wrong reshape | |
3440 | * starting/continuation conditions). Mdmon doesn't | |
3441 | * switch to next array in container and reentry | |
3442 | * conditions for the same array occur. | |
3443 | * This is possibly interim until the behaviour of | |
3444 | * reshape_array is resolved(). | |
3445 | */ | |
3446 | printf(Name ": Multiple reshape execution detected for " | |
3447 | "device %s.", adev); | |
3448 | close(fd); | |
3449 | break; | |
3450 | } | |
4dd2df09 | 3451 | strcpy(last_devnm, mdstat->devnm); |
2d04d7e5 | 3452 | |
4dd2df09 | 3453 | sysfs_init(content, fd, mdstat->devnm); |
5da9ab98 | 3454 | |
4dd2df09 | 3455 | if (mdmon_running(container)) |
78340e26 AK |
3456 | flush_mdmon(container); |
3457 | ||
1bb174ba | 3458 | rv = reshape_array(container, fd, adev, st, |
19ceb16d | 3459 | content, force, NULL, 0ULL, |
ba728be7 | 3460 | backup_file, verbose, 1, restart, |
b76b30e0 | 3461 | freeze_reshape); |
5da9ab98 | 3462 | close(fd); |
b76b30e0 AK |
3463 | |
3464 | if (freeze_reshape) { | |
3465 | sysfs_free(cc); | |
3466 | exit(0); | |
3467 | } | |
3468 | ||
493f5dd6 | 3469 | restart = 0; |
5da9ab98 N |
3470 | if (rv) |
3471 | break; | |
78340e26 | 3472 | |
4dd2df09 | 3473 | if (mdmon_running(container)) |
78340e26 | 3474 | flush_mdmon(container); |
5da9ab98 | 3475 | } |
bcc9e9ed AK |
3476 | if (!rv) |
3477 | unfreeze(st); | |
1bb174ba | 3478 | sysfs_free(cc); |
5da9ab98 N |
3479 | exit(0); |
3480 | } | |
3481 | ||
7236ee7a N |
3482 | /* |
3483 | * We run a child process in the background which performs the following | |
3484 | * steps: | |
3485 | * - wait for resync to reach a certain point | |
3486 | * - suspend io to the following section | |
3487 | * - backup that section | |
3488 | * - allow resync to proceed further | |
3489 | * - resume io | |
3490 | * - discard the backup. | |
3491 | * | |
3492 | * When are combined in slightly different ways in the three cases. | |
3493 | * Grow: | |
3494 | * - suspend/backup/allow/wait/resume/discard | |
3495 | * Shrink: | |
3496 | * - allow/wait/suspend/backup/allow/wait/resume/discard | |
3497 | * same-size: | |
3498 | * - wait/resume/discard/suspend/backup/allow | |
3499 | * | |
3500 | * suspend/backup/allow always come together | |
3501 | * wait/resume/discard do too. | |
3502 | * For the same-size case we have two backups to improve flow. | |
24daa16f | 3503 | * |
7236ee7a | 3504 | */ |
e86c9dd6 | 3505 | |
7443ee81 N |
3506 | int progress_reshape(struct mdinfo *info, struct reshape *reshape, |
3507 | unsigned long long backup_point, | |
3508 | unsigned long long wait_point, | |
3509 | unsigned long long *suspend_point, | |
3510 | unsigned long long *reshape_completed) | |
3511 | { | |
3512 | /* This function is called repeatedly by the reshape manager. | |
3513 | * It determines how much progress can safely be made and allows | |
3514 | * that progress. | |
3515 | * - 'info' identifies the array and particularly records in | |
3516 | * ->reshape_progress the metadata's knowledge of progress | |
3517 | * This is a sector offset from the start of the array | |
3518 | * of the next array block to be relocated. This number | |
3519 | * may increase from 0 or decrease from array_size, depending | |
3520 | * on the type of reshape that is happening. | |
3521 | * Note that in contrast, 'sync_completed' is a block count of the | |
3522 | * reshape so far. It gives the distance between the start point | |
3523 | * (head or tail of device) and the next place that data will be | |
3524 | * written. It always increases. | |
3525 | * - 'reshape' is the structure created by analyse_change | |
3526 | * - 'backup_point' shows how much the metadata manager has backed-up | |
3527 | * data. For reshapes with increasing progress, it is the next address | |
3528 | * to be backed up, previous addresses have been backed-up. For | |
3529 | * decreasing progress, it is the earliest address that has been | |
3530 | * backed up - later address are also backed up. | |
3531 | * So addresses between reshape_progress and backup_point are | |
3532 | * backed up providing those are in the 'correct' order. | |
3533 | * - 'wait_point' is an array address. When reshape_completed | |
3534 | * passes this point, progress_reshape should return. It might | |
3535 | * return earlier if it determines that ->reshape_progress needs | |
3536 | * to be updated or further backup is needed. | |
3537 | * - suspend_point is maintained by progress_reshape and the caller | |
3538 | * should not touch it except to initialise to zero. | |
3539 | * It is an array address and it only increases in 2.6.37 and earlier. | |
b6b95155 | 3540 | * This makes it difficult to handle reducing reshapes with |
7443ee81 N |
3541 | * external metadata. |
3542 | * However: it is similar to backup_point in that it records the | |
3543 | * other end of a suspended region from reshape_progress. | |
3544 | * it is moved to extend the region that is safe to backup and/or | |
3545 | * reshape | |
3546 | * - reshape_completed is read from sysfs and returned. The caller | |
3547 | * should copy this into ->reshape_progress when it has reason to | |
3548 | * believe that the metadata knows this, and any backup outside this | |
3549 | * has been erased. | |
3550 | * | |
3551 | * Return value is: | |
3552 | * 1 if more data from backup_point - but only as far as suspend_point, | |
3553 | * should be backed up | |
3554 | * 0 if things are progressing smoothly | |
9e034f70 N |
3555 | * -1 if the reshape is finished because it is all done, |
3556 | * -2 if the reshape is finished due to an error. | |
7443ee81 N |
3557 | */ |
3558 | ||
3559 | int advancing = (reshape->after.data_disks | |
3560 | >= reshape->before.data_disks); | |
38dad34a N |
3561 | unsigned long long need_backup; /* All data between start of array and |
3562 | * here will at some point need to | |
3563 | * be backed up. | |
d0ab945e | 3564 | */ |
7443ee81 | 3565 | unsigned long long read_offset, write_offset; |
b4f8e38b | 3566 | unsigned long long write_range; |
7443ee81 | 3567 | unsigned long long max_progress, target, completed; |
d0ab945e N |
3568 | unsigned long long array_size = (info->component_size |
3569 | * reshape->before.data_disks); | |
7443ee81 | 3570 | int fd; |
77a73a17 | 3571 | char buf[20]; |
7443ee81 N |
3572 | |
3573 | /* First, we unsuspend any region that is now known to be safe. | |
3574 | * If suspend_point is on the 'wrong' side of reshape_progress, then | |
3575 | * we don't have or need suspension at the moment. This is true for | |
3576 | * native metadata when we don't need to back-up. | |
3577 | */ | |
3578 | if (advancing) { | |
49cd738b | 3579 | if (info->reshape_progress <= *suspend_point) |
7443ee81 N |
3580 | sysfs_set_num(info, NULL, "suspend_lo", |
3581 | info->reshape_progress); | |
3582 | } else { | |
3583 | /* Note: this won't work in 2.6.37 and before. | |
3584 | * Something somewhere should make sure we don't need it! | |
3585 | */ | |
49cd738b | 3586 | if (info->reshape_progress >= *suspend_point) |
7443ee81 N |
3587 | sysfs_set_num(info, NULL, "suspend_hi", |
3588 | info->reshape_progress); | |
3589 | } | |
3590 | ||
3591 | /* Now work out how far it is safe to progress. | |
3592 | * If the read_offset for ->reshape_progress is less than | |
3593 | * 'blocks' beyond the write_offset, we can only progress as far | |
3594 | * as a backup. | |
3595 | * Otherwise we can progress until the write_offset for the new location | |
3596 | * reaches (within 'blocks' of) the read_offset at the current location. | |
3597 | * However that region must be suspended unless we are using native | |
3598 | * metadata. | |
3599 | * If we need to suspend more, we limit it to 128M per device, which is | |
3600 | * rather arbitrary and should be some time-based calculation. | |
3601 | */ | |
ec757320 N |
3602 | read_offset = info->reshape_progress / reshape->before.data_disks; |
3603 | write_offset = info->reshape_progress / reshape->after.data_disks; | |
b4f8e38b | 3604 | write_range = info->new_chunk/512; |
38dad34a N |
3605 | if (reshape->before.data_disks == reshape->after.data_disks) |
3606 | need_backup = array_size; | |
3607 | else | |
3608 | need_backup = reshape->backup_blocks; | |
7443ee81 | 3609 | if (advancing) { |
38dad34a | 3610 | if (read_offset < write_offset + write_range) |
7443ee81 | 3611 | max_progress = backup_point; |
ddee071d | 3612 | else |
7443ee81 | 3613 | max_progress = |
2f3dd5e4 N |
3614 | read_offset * |
3615 | reshape->after.data_disks; | |
7443ee81 | 3616 | } else { |
38dad34a N |
3617 | if (read_offset > write_offset - write_range) |
3618 | /* Can only progress as far as has been backed up, | |
3619 | * which must be suspended */ | |
7443ee81 | 3620 | max_progress = backup_point; |
38dad34a N |
3621 | else if (info->reshape_progress <= need_backup) |
3622 | max_progress = backup_point; | |
3623 | else { | |
3624 | if (info->array.major_version >= 0) | |
3625 | /* Can progress until backup is needed */ | |
3626 | max_progress = need_backup; | |
3627 | else { | |
3628 | /* Can progress until metadata update is required */ | |
3629 | max_progress = | |
3630 | read_offset * | |
3631 | reshape->after.data_disks; | |
3632 | /* but data must be suspended */ | |
3633 | if (max_progress < *suspend_point) | |
3634 | max_progress = *suspend_point; | |
3635 | } | |
7443ee81 N |
3636 | } |
3637 | } | |
3638 | ||
3639 | /* We know it is safe to progress to 'max_progress' providing | |
3640 | * it is suspended or we are using native metadata. | |
3641 | * Consider extending suspend_point 128M per device if it | |
3642 | * is less than 64M per device beyond reshape_progress. | |
3643 | * But always do a multiple of 'blocks' | |
832b2b9a N |
3644 | * FIXME this is too big - it takes to long to complete |
3645 | * this much. | |
7443ee81 N |
3646 | */ |
3647 | target = 64*1024*2 * min(reshape->before.data_disks, | |
24daa16f | 3648 | reshape->after.data_disks); |
b4f8e38b | 3649 | target /= reshape->backup_blocks; |
7443ee81 N |
3650 | if (target < 2) |
3651 | target = 2; | |
b4f8e38b | 3652 | target *= reshape->backup_blocks; |
7443ee81 N |
3653 | |
3654 | /* For externally managed metadata we always need to suspend IO to | |
3655 | * the area being reshaped so we regularly push suspend_point forward. | |
3656 | * For native metadata we only need the suspend if we are going to do | |
3657 | * a backup. | |
3658 | */ | |
3659 | if (advancing) { | |
d0ab945e N |
3660 | if ((need_backup > info->reshape_progress |
3661 | || info->array.major_version < 0) && | |
7443ee81 | 3662 | *suspend_point < info->reshape_progress + target) { |
d0ab945e N |
3663 | if (need_backup < *suspend_point + 2 * target) |
3664 | *suspend_point = need_backup; | |
3665 | else if (*suspend_point + 2 * target < array_size) | |
7443ee81 | 3666 | *suspend_point += 2 * target; |
d0ab945e N |
3667 | else |
3668 | *suspend_point = array_size; | |
7443ee81 | 3669 | sysfs_set_num(info, NULL, "suspend_hi", *suspend_point); |
d0ab945e N |
3670 | if (max_progress > *suspend_point) |
3671 | max_progress = *suspend_point; | |
7443ee81 N |
3672 | } |
3673 | } else { | |
38dad34a N |
3674 | if (info->array.major_version >= 0) { |
3675 | /* Only need to suspend when about to backup */ | |
3676 | if (info->reshape_progress < need_backup * 2 && | |
3677 | *suspend_point > 0) { | |
d0ab945e | 3678 | *suspend_point = 0; |
38dad34a N |
3679 | sysfs_set_num(info, NULL, "suspend_lo", 0); |
3680 | sysfs_set_num(info, NULL, "suspend_hi", need_backup); | |
3681 | } | |
3682 | } else { | |
3683 | /* Need to suspend continually */ | |
3684 | if (info->reshape_progress < *suspend_point) | |
3685 | *suspend_point = info->reshape_progress; | |
3686 | if (*suspend_point + target < info->reshape_progress) | |
3687 | /* No need to move suspend region yet */; | |
3688 | else { | |
3689 | if (*suspend_point >= 2 * target) | |
3690 | *suspend_point -= 2 * target; | |
3691 | else | |
3692 | *suspend_point = 0; | |
3693 | sysfs_set_num(info, NULL, "suspend_lo", | |
3694 | *suspend_point); | |
3695 | } | |
d0ab945e N |
3696 | if (max_progress < *suspend_point) |
3697 | max_progress = *suspend_point; | |
7443ee81 N |
3698 | } |
3699 | } | |
3700 | ||
3701 | /* now set sync_max to allow that progress. sync_max, like | |
3702 | * sync_completed is a count of sectors written per device, so | |
3703 | * we find the difference between max_progress and the start point, | |
3704 | * and divide that by after.data_disks to get a sync_max | |
3705 | * number. | |
3706 | * At the same time we convert wait_point to a similar number | |
3707 | * for comparing against sync_completed. | |
3708 | */ | |
92d1991f | 3709 | /* scale down max_progress to per_disk */ |
7443ee81 | 3710 | max_progress /= reshape->after.data_disks; |
92d1991f N |
3711 | /* Round to chunk size as some kernels give an erroneously high number */ |
3712 | max_progress /= info->new_chunk/512; | |
3713 | max_progress *= info->new_chunk/512; | |
7f913e9b N |
3714 | /* And round to old chunk size as the kernel wants that */ |
3715 | max_progress /= info->array.chunk_size/512; | |
3716 | max_progress *= info->array.chunk_size/512; | |
92d1991f N |
3717 | /* Limit progress to the whole device */ |
3718 | if (max_progress > info->component_size) | |
3719 | max_progress = info->component_size; | |
7443ee81 | 3720 | wait_point /= reshape->after.data_disks; |
92d1991f N |
3721 | if (!advancing) { |
3722 | /* switch from 'device offset' to 'processed block count' */ | |
3723 | max_progress = info->component_size - max_progress; | |
3724 | wait_point = info->component_size - wait_point; | |
3725 | } | |
7443ee81 N |
3726 | |
3727 | sysfs_set_num(info, NULL, "sync_max", max_progress); | |
3728 | ||
3729 | /* Now wait. If we have already reached the point that we were | |
3730 | * asked to wait to, don't wait at all, else wait for any change. | |
3731 | * We need to select on 'sync_completed' as that is the place that | |
3732 | * notifications happen, but we are really interested in | |
3733 | * 'reshape_position' | |
3734 | */ | |
3735 | fd = sysfs_get_fd(info, NULL, "sync_completed"); | |
3736 | if (fd < 0) | |
77a73a17 | 3737 | goto check_progress; |
7443ee81 | 3738 | |
621ea11b | 3739 | if (sysfs_fd_get_ll(fd, &completed) < 0) |
77a73a17 | 3740 | goto check_progress; |
621ea11b | 3741 | |
7443ee81 N |
3742 | while (completed < max_progress && completed < wait_point) { |
3743 | /* Check that sync_action is still 'reshape' to avoid | |
3744 | * waiting forever on a dead array | |
3745 | */ | |
3746 | char action[20]; | |
3747 | fd_set rfds; | |
3748 | if (sysfs_get_str(info, NULL, "sync_action", | |
3749 | action, 20) <= 0 || | |
3750 | strncmp(action, "reshape", 7) != 0) | |
3751 | break; | |
26d6e157 AK |
3752 | /* Some kernels reset 'sync_completed' to zero |
3753 | * before setting 'sync_action' to 'idle'. | |
3754 | * So we need these extra tests. | |
3755 | */ | |
3756 | if (completed == 0 && advancing | |
3757 | && info->reshape_progress > 0) | |
3758 | break; | |
3759 | if (completed == 0 && !advancing | |
3760 | && info->reshape_progress < (info->component_size | |
3761 | * reshape->after.data_disks)) | |
3762 | break; | |
7443ee81 N |
3763 | FD_ZERO(&rfds); |
3764 | FD_SET(fd, &rfds); | |
3765 | select(fd+1, NULL, NULL, &rfds, NULL); | |
621ea11b | 3766 | if (sysfs_fd_get_ll(fd, &completed) < 0) |
77a73a17 | 3767 | goto check_progress; |
7443ee81 | 3768 | } |
10d0d365 AK |
3769 | /* Some kernels reset 'sync_completed' to zero, |
3770 | * we need to have real point we are in md | |
3771 | */ | |
3772 | if (completed == 0) | |
3773 | completed = max_progress; | |
3774 | ||
92d1991f N |
3775 | /* some kernels can give an incorrectly high 'completed' number */ |
3776 | completed /= (info->new_chunk/512); | |
3777 | completed *= (info->new_chunk/512); | |
7443ee81 N |
3778 | /* Convert 'completed' back in to a 'progress' number */ |
3779 | completed *= reshape->after.data_disks; | |
3780 | if (!advancing) { | |
3781 | completed = info->component_size * reshape->after.data_disks | |
3782 | - completed; | |
3783 | } | |
3784 | *reshape_completed = completed; | |
24daa16f | 3785 | |
7443ee81 N |
3786 | close(fd); |
3787 | ||
3788 | /* We return the need_backup flag. Caller will decide | |
d0ab945e | 3789 | * how much - a multiple of ->backup_blocks up to *suspend_point |
7443ee81 | 3790 | */ |
38dad34a N |
3791 | if (advancing) |
3792 | return need_backup > info->reshape_progress; | |
3793 | else | |
3794 | return need_backup >= info->reshape_progress; | |
77a73a17 N |
3795 | |
3796 | check_progress: | |
3797 | /* if we couldn't read a number from sync_completed, then | |
3798 | * either the reshape did complete, or it aborted. | |
3799 | * We can tell which by checking for 'none' in reshape_position. | |
621ea11b N |
3800 | * If it did abort, then it might immediately restart if it |
3801 | * it was just a device failure that leaves us degraded but | |
3802 | * functioning. | |
77a73a17 N |
3803 | */ |
3804 | strcpy(buf, "hi"); | |
3805 | if (sysfs_get_str(info, NULL, "reshape_position", buf, sizeof(buf)) < 0 | |
621ea11b N |
3806 | || strncmp(buf, "none", 4) != 0) { |
3807 | /* The abort might only be temporary. Wait up to 10 | |
3808 | * seconds for fd to contain a valid number again. | |
3809 | */ | |
3810 | struct timeval tv; | |
3811 | int rv = -2; | |
3812 | tv.tv_sec = 10; | |
3813 | tv.tv_usec = 0; | |
6560987b | 3814 | while (fd >= 0 && rv < 0 && tv.tv_sec > 0) { |
621ea11b N |
3815 | fd_set rfds; |
3816 | FD_ZERO(&rfds); | |
3817 | FD_SET(fd, &rfds); | |
3818 | if (select(fd+1, NULL, NULL, &rfds, &tv) != 1) | |
3819 | break; | |
6560987b N |
3820 | switch (sysfs_fd_get_ll(fd, &completed)) { |
3821 | case 0: | |
621ea11b N |
3822 | /* all good again */ |
3823 | rv = 1; | |
6560987b N |
3824 | break; |
3825 | case -2: /* read error - abort */ | |
3826 | tv.tv_sec = 0; | |
3827 | break; | |
3828 | } | |
621ea11b N |
3829 | } |
3830 | if (fd >= 0) | |
3831 | close(fd); | |
3832 | return rv; /* abort */ | |
3833 | } else { | |
6d5316f6 | 3834 | /* Maybe racing with array shutdown - check state */ |
621ea11b N |
3835 | if (fd >= 0) |
3836 | close(fd); | |
6d5316f6 N |
3837 | if (sysfs_get_str(info, NULL, "array_state", buf, sizeof(buf)) < 0 |
3838 | || strncmp(buf, "inactive", 8) == 0 | |
3839 | || strncmp(buf, "clear",5) == 0) | |
3840 | return -2; /* abort */ | |
77a73a17 | 3841 | return -1; /* complete */ |
6d5316f6 | 3842 | } |
7443ee81 N |
3843 | } |
3844 | ||
fcf57625 | 3845 | /* FIXME return status is never checked */ |
4411fb17 | 3846 | static int grow_backup(struct mdinfo *sra, |
7236ee7a | 3847 | unsigned long long offset, /* per device */ |
7443ee81 | 3848 | unsigned long stripes, /* per device, in old chunks */ |
7236ee7a N |
3849 | int *sources, unsigned long long *offsets, |
3850 | int disks, int chunk, int level, int layout, | |
3851 | int dests, int *destfd, unsigned long long *destoffsets, | |
d4445387 | 3852 | int part, int *degraded, |
7236ee7a N |
3853 | char *buf) |
3854 | { | |
3855 | /* Backup 'blocks' sectors at 'offset' on each device of the array, | |
3856 | * to storage 'destfd' (offset 'destoffsets'), after first | |
3857 | * suspending IO. Then allow resync to continue | |
3858 | * over the suspended section. | |
3859 | * Use part 'part' of the backup-super-block. | |
3860 | */ | |
3861 | int odata = disks; | |
3862 | int rv = 0; | |
3863 | int i; | |
f21e18ca N |
3864 | unsigned long long ll; |
3865 | int new_degraded; | |
7236ee7a N |
3866 | //printf("offset %llu\n", offset); |
3867 | if (level >= 4) | |
3868 | odata--; | |
3869 | if (level == 6) | |
3870 | odata--; | |
7443ee81 | 3871 | |
d4445387 | 3872 | /* Check that array hasn't become degraded, else we might backup the wrong data */ |
2c6ac128 N |
3873 | if (sysfs_get_ll(sra, NULL, "degraded", &ll) < 0) |
3874 | return -1; /* FIXME this error is ignored */ | |
f21e18ca | 3875 | new_degraded = (int)ll; |
d4445387 N |
3876 | if (new_degraded != *degraded) { |
3877 | /* check each device to ensure it is still working */ | |
3878 | struct mdinfo *sd; | |
3879 | for (sd = sra->devs ; sd ; sd = sd->next) { | |
3880 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
3881 | continue; | |
3882 | if (sd->disk.state & (1<<MD_DISK_SYNC)) { | |
3883 | char sbuf[20]; | |
3884 | if (sysfs_get_str(sra, sd, "state", sbuf, 20) < 0 || | |
3885 | strstr(sbuf, "faulty") || | |
3886 | strstr(sbuf, "in_sync") == NULL) { | |
3887 | /* this device is dead */ | |
3888 | sd->disk.state = (1<<MD_DISK_FAULTY); | |
3889 | if (sd->disk.raid_disk >= 0 && | |
3890 | sources[sd->disk.raid_disk] >= 0) { | |
3891 | close(sources[sd->disk.raid_disk]); | |
3892 | sources[sd->disk.raid_disk] = -1; | |
3893 | } | |
3894 | } | |
3895 | } | |
3896 | } | |
3897 | *degraded = new_degraded; | |
3898 | } | |
7236ee7a N |
3899 | if (part) { |
3900 | bsb.arraystart2 = __cpu_to_le64(offset * odata); | |
200871ad | 3901 | bsb.length2 = __cpu_to_le64(stripes * (chunk/512) * odata); |
7236ee7a N |
3902 | } else { |
3903 | bsb.arraystart = __cpu_to_le64(offset * odata); | |
200871ad | 3904 | bsb.length = __cpu_to_le64(stripes * (chunk/512) * odata); |
7236ee7a N |
3905 | } |
3906 | if (part) | |
3907 | bsb.magic[15] = '2'; | |
3908 | for (i = 0; i < dests; i++) | |
3909 | if (part) | |
3910 | lseek64(destfd[i], destoffsets[i] + __le64_to_cpu(bsb.devstart2)*512, 0); | |
3911 | else | |
3912 | lseek64(destfd[i], destoffsets[i], 0); | |
3913 | ||
24daa16f | 3914 | rv = save_stripes(sources, offsets, |
7236ee7a N |
3915 | disks, chunk, level, layout, |
3916 | dests, destfd, | |
3917 | offset*512*odata, stripes * chunk * odata, | |
3918 | buf); | |
3919 | ||
3920 | if (rv) | |
3921 | return rv; | |
97396422 | 3922 | bsb.mtime = __cpu_to_le64(time(0)); |
7236ee7a N |
3923 | for (i = 0; i < dests; i++) { |
3924 | bsb.devstart = __cpu_to_le64(destoffsets[i]/512); | |
3925 | ||
3926 | bsb.sb_csum = bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb)); | |
3927 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0) | |
3928 | bsb.sb_csum2 = bsb_csum((char*)&bsb, | |
3929 | ((char*)&bsb.sb_csum2)-((char*)&bsb)); | |
3930 | ||
72044953 | 3931 | rv = -1; |
f21e18ca N |
3932 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i] - 4096, 0) |
3933 | != destoffsets[i] - 4096) | |
72044953 N |
3934 | break; |
3935 | if (write(destfd[i], &bsb, 512) != 512) | |
3936 | break; | |
ff94fb86 | 3937 | if (destoffsets[i] > 4096) { |
f21e18ca | 3938 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i]+stripes*chunk*odata, 0) != |
a847575a | 3939 | destoffsets[i]+stripes*chunk*odata) |
72044953 N |
3940 | break; |
3941 | if (write(destfd[i], &bsb, 512) != 512) | |
3942 | break; | |
ff94fb86 | 3943 | } |
7236ee7a | 3944 | fsync(destfd[i]); |
72044953 | 3945 | rv = 0; |
7236ee7a | 3946 | } |
2efedc7b | 3947 | |
fcf57625 | 3948 | return rv; |
7236ee7a N |
3949 | } |
3950 | ||
3951 | /* in 2.6.30, the value reported by sync_completed can be | |
3952 | * less that it should be by one stripe. | |
3953 | * This only happens when reshape hits sync_max and pauses. | |
3954 | * So allow wait_backup to either extent sync_max further | |
3955 | * than strictly necessary, or return before the | |
3956 | * sync has got quite as far as we would really like. | |
3957 | * This is what 'blocks2' is for. | |
3958 | * The various caller give appropriate values so that | |
3959 | * every works. | |
3960 | */ | |
fcf57625 | 3961 | /* FIXME return value is often ignored */ |
24daa16f N |
3962 | static int forget_backup(int dests, int *destfd, |
3963 | unsigned long long *destoffsets, | |
3964 | int part) | |
7236ee7a | 3965 | { |
24daa16f | 3966 | /* |
7443ee81 | 3967 | * Erase backup 'part' (which is 0 or 1) |
7236ee7a | 3968 | */ |
7236ee7a | 3969 | int i; |
fcf57625 | 3970 | int rv; |
7236ee7a | 3971 | |
7236ee7a N |
3972 | if (part) { |
3973 | bsb.arraystart2 = __cpu_to_le64(0); | |
3974 | bsb.length2 = __cpu_to_le64(0); | |
3975 | } else { | |
3976 | bsb.arraystart = __cpu_to_le64(0); | |
3977 | bsb.length = __cpu_to_le64(0); | |
3978 | } | |
97396422 | 3979 | bsb.mtime = __cpu_to_le64(time(0)); |
fcf57625 | 3980 | rv = 0; |
7236ee7a N |
3981 | for (i = 0; i < dests; i++) { |
3982 | bsb.devstart = __cpu_to_le64(destoffsets[i]/512); | |
3983 | bsb.sb_csum = bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb)); | |
3984 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0) | |
3985 | bsb.sb_csum2 = bsb_csum((char*)&bsb, | |
3986 | ((char*)&bsb.sb_csum2)-((char*)&bsb)); | |
f21e18ca | 3987 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i]-4096, 0) != |
a847575a | 3988 | destoffsets[i]-4096) |
72044953 | 3989 | rv = -1; |
24daa16f | 3990 | if (rv == 0 && |
72044953 N |
3991 | write(destfd[i], &bsb, 512) != 512) |
3992 | rv = -1; | |
7236ee7a N |
3993 | fsync(destfd[i]); |
3994 | } | |
fcf57625 | 3995 | return rv; |
7236ee7a | 3996 | } |
e86c9dd6 | 3997 | |
7236ee7a N |
3998 | static void fail(char *msg) |
3999 | { | |
fcf57625 | 4000 | int rv; |
72044953 N |
4001 | rv = (write(2, msg, strlen(msg)) != (int)strlen(msg)); |
4002 | rv |= (write(2, "\n", 1) != 1); | |
fcf57625 | 4003 | exit(rv ? 1 : 2); |
7236ee7a N |
4004 | } |
4005 | ||
4006 | static char *abuf, *bbuf; | |
f21e18ca | 4007 | static unsigned long long abuflen; |
7236ee7a N |
4008 | static void validate(int afd, int bfd, unsigned long long offset) |
4009 | { | |
4010 | /* check that the data in the backup against the array. | |
4011 | * This is only used for regression testing and should not | |
4012 | * be used while the array is active | |
4013 | */ | |
7236ee7a N |
4014 | if (afd < 0) |
4015 | return; | |
4016 | lseek64(bfd, offset - 4096, 0); | |
4017 | if (read(bfd, &bsb2, 512) != 512) | |
4018 | fail("cannot read bsb"); | |
4019 | if (bsb2.sb_csum != bsb_csum((char*)&bsb2, | |
4020 | ((char*)&bsb2.sb_csum)-((char*)&bsb2))) | |
4021 | fail("first csum bad"); | |
4022 | if (memcmp(bsb2.magic, "md_backup_data", 14) != 0) | |
4023 | fail("magic is bad"); | |
4024 | if (memcmp(bsb2.magic, "md_backup_data-2", 16) == 0 && | |
4025 | bsb2.sb_csum2 != bsb_csum((char*)&bsb2, | |
24daa16f | 4026 | ((char*)&bsb2.sb_csum2)-((char*)&bsb2))) |
7236ee7a N |
4027 | fail("second csum bad"); |
4028 | ||
4029 | if (__le64_to_cpu(bsb2.devstart)*512 != offset) | |
4030 | fail("devstart is wrong"); | |
4031 | ||
4032 | if (bsb2.length) { | |
4033 | unsigned long long len = __le64_to_cpu(bsb2.length)*512; | |
4034 | ||
4035 | if (abuflen < len) { | |
4036 | free(abuf); | |
4037 | free(bbuf); | |
4038 | abuflen = len; | |
fcf57625 N |
4039 | if (posix_memalign((void**)&abuf, 4096, abuflen) || |
4040 | posix_memalign((void**)&bbuf, 4096, abuflen)) { | |
4041 | abuflen = 0; | |
4042 | /* just stop validating on mem-alloc failure */ | |
4043 | return; | |
4044 | } | |
e86c9dd6 | 4045 | } |
48924014 | 4046 | |
7236ee7a | 4047 | lseek64(bfd, offset, 0); |
f21e18ca | 4048 | if ((unsigned long long)read(bfd, bbuf, len) != len) { |
080fd005 | 4049 | //printf("len %llu\n", len); |
7236ee7a N |
4050 | fail("read first backup failed"); |
4051 | } | |
4052 | lseek64(afd, __le64_to_cpu(bsb2.arraystart)*512, 0); | |
f21e18ca | 4053 | if ((unsigned long long)read(afd, abuf, len) != len) |
7236ee7a N |
4054 | fail("read first from array failed"); |
4055 | if (memcmp(bbuf, abuf, len) != 0) { | |
24daa16f | 4056 | #if 0 |
7236ee7a N |
4057 | int i; |
4058 | printf("offset=%llu len=%llu\n", | |
080fd005 | 4059 | (unsigned long long)__le64_to_cpu(bsb2.arraystart)*512, len); |
7236ee7a N |
4060 | for (i=0; i<len; i++) |
4061 | if (bbuf[i] != abuf[i]) { | |
4062 | printf("first diff byte %d\n", i); | |
93ecfa01 | 4063 | break; |
7236ee7a | 4064 | } |
24daa16f | 4065 | #endif |
7236ee7a | 4066 | fail("data1 compare failed"); |
e86c9dd6 | 4067 | } |
7236ee7a N |
4068 | } |
4069 | if (bsb2.length2) { | |
4070 | unsigned long long len = __le64_to_cpu(bsb2.length2)*512; | |
4071 | ||
4072 | if (abuflen < len) { | |
4073 | free(abuf); | |
4074 | free(bbuf); | |
4075 | abuflen = len; | |
503975b9 N |
4076 | abuf = xmalloc(abuflen); |
4077 | bbuf = xmalloc(abuflen); | |
e86c9dd6 NB |
4078 | } |
4079 | ||
7236ee7a | 4080 | lseek64(bfd, offset+__le64_to_cpu(bsb2.devstart2)*512, 0); |
f21e18ca | 4081 | if ((unsigned long long)read(bfd, bbuf, len) != len) |
7236ee7a N |
4082 | fail("read second backup failed"); |
4083 | lseek64(afd, __le64_to_cpu(bsb2.arraystart2)*512, 0); | |
f21e18ca | 4084 | if ((unsigned long long)read(afd, abuf, len) != len) |
7236ee7a N |
4085 | fail("read second from array failed"); |
4086 | if (memcmp(bbuf, abuf, len) != 0) | |
4087 | fail("data2 compare failed"); | |
e86c9dd6 | 4088 | } |
7236ee7a | 4089 | } |
e86c9dd6 | 4090 | |
999b4972 N |
4091 | int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, |
4092 | struct supertype *st, unsigned long blocks, | |
4093 | int *fds, unsigned long long *offsets, | |
4094 | int dests, int *destfd, unsigned long long *destoffsets) | |
7236ee7a | 4095 | { |
7443ee81 N |
4096 | /* Monitor a reshape where backup is being performed using |
4097 | * 'native' mechanism - either to a backup file, or | |
4098 | * to some space in a spare. | |
4099 | */ | |
7236ee7a | 4100 | char *buf; |
7443ee81 N |
4101 | int degraded = -1; |
4102 | unsigned long long speed; | |
4103 | unsigned long long suspend_point, array_size; | |
4104 | unsigned long long backup_point, wait_point; | |
4105 | unsigned long long reshape_completed; | |
4106 | int done = 0; | |
4107 | int increasing = reshape->after.data_disks >= reshape->before.data_disks; | |
4108 | int part = 0; /* The next part of the backup area to fill. It may already | |
4109 | * be full, so we need to check */ | |
4110 | int level = reshape->level; | |
4111 | int layout = reshape->before.layout; | |
4112 | int data = reshape->before.data_disks; | |
4113 | int disks = reshape->before.data_disks + reshape->parity; | |
4114 | int chunk = sra->array.chunk_size; | |
da8100ca N |
4115 | struct mdinfo *sd; |
4116 | unsigned long stripes; | |
3b7e9d0c | 4117 | int uuid[4]; |
da8100ca N |
4118 | |
4119 | /* set up the backup-super-block. This requires the | |
4120 | * uuid from the array. | |
4121 | */ | |
4122 | /* Find a superblock */ | |
4123 | for (sd = sra->devs; sd; sd = sd->next) { | |
4124 | char *dn; | |
4125 | int devfd; | |
4126 | int ok; | |
4127 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
4128 | continue; | |
4129 | dn = map_dev(sd->disk.major, sd->disk.minor, 1); | |
4130 | devfd = dev_open(dn, O_RDONLY); | |
4131 | if (devfd < 0) | |
4132 | continue; | |
4133 | ok = st->ss->load_super(st, devfd, NULL); | |
4134 | close(devfd); | |
77f8d358 | 4135 | if (ok == 0) |
da8100ca N |
4136 | break; |
4137 | } | |
4138 | if (!sd) { | |
e7b84f9d | 4139 | pr_err("Cannot find a superblock\n"); |
da8100ca N |
4140 | return 0; |
4141 | } | |
4142 | ||
4143 | memset(&bsb, 0, 512); | |
4144 | memcpy(bsb.magic, "md_backup_data-1", 16); | |
3b7e9d0c LB |
4145 | st->ss->uuid_from_super(st, uuid); |
4146 | memcpy(bsb.set_uuid, uuid, 16); | |
da8100ca N |
4147 | bsb.mtime = __cpu_to_le64(time(0)); |
4148 | bsb.devstart2 = blocks; | |
4149 | ||
4150 | stripes = blocks / (sra->array.chunk_size/512) / | |
4151 | reshape->before.data_disks; | |
e86c9dd6 | 4152 | |
fcf57625 N |
4153 | if (posix_memalign((void**)&buf, 4096, disks * chunk)) |
4154 | /* Don't start the 'reshape' */ | |
4155 | return 0; | |
7443ee81 N |
4156 | if (reshape->before.data_disks == reshape->after.data_disks) { |
4157 | sysfs_get_ll(sra, NULL, "sync_speed_min", &speed); | |
4158 | sysfs_set_num(sra, NULL, "sync_speed_min", 200000); | |
4159 | } | |
e86c9dd6 | 4160 | |
7443ee81 | 4161 | if (increasing) { |
96533072 | 4162 | array_size = sra->component_size * reshape->after.data_disks; |
7443ee81 N |
4163 | backup_point = sra->reshape_progress; |
4164 | suspend_point = 0; | |
4165 | } else { | |
96533072 | 4166 | array_size = sra->component_size * reshape->before.data_disks; |
25da62d9 | 4167 | backup_point = reshape->backup_blocks; |
7443ee81 N |
4168 | suspend_point = array_size; |
4169 | } | |
7236ee7a | 4170 | |
7443ee81 N |
4171 | while (!done) { |
4172 | int rv; | |
7236ee7a | 4173 | |
7443ee81 N |
4174 | /* Want to return as soon the oldest backup slot can |
4175 | * be released as that allows us to start backing up | |
4176 | * some more, providing suspend_point has been | |
b6b95155 | 4177 | * advanced, which it should have. |
7443ee81 N |
4178 | */ |
4179 | if (increasing) { | |
4180 | wait_point = array_size; | |
4181 | if (part == 0 && __le64_to_cpu(bsb.length) > 0) | |
4182 | wait_point = (__le64_to_cpu(bsb.arraystart) + | |
4183 | __le64_to_cpu(bsb.length)); | |
4184 | if (part == 1 && __le64_to_cpu(bsb.length2) > 0) | |
4185 | wait_point = (__le64_to_cpu(bsb.arraystart2) + | |
4186 | __le64_to_cpu(bsb.length2)); | |
4187 | } else { | |
4188 | wait_point = 0; | |
4189 | if (part == 0 && __le64_to_cpu(bsb.length) > 0) | |
4190 | wait_point = __le64_to_cpu(bsb.arraystart); | |
4191 | if (part == 1 && __le64_to_cpu(bsb.length2) > 0) | |
4192 | wait_point = __le64_to_cpu(bsb.arraystart2); | |
4193 | } | |
4194 | ||
4195 | rv = progress_reshape(sra, reshape, | |
4196 | backup_point, wait_point, | |
4197 | &suspend_point, &reshape_completed); | |
7443ee81 N |
4198 | /* external metadata would need to ping_monitor here */ |
4199 | sra->reshape_progress = reshape_completed; | |
7236ee7a | 4200 | |
7443ee81 N |
4201 | /* Clear any backup region that is before 'here' */ |
4202 | if (increasing) { | |
b3cf095a N |
4203 | if (__le64_to_cpu(bsb.length) > 0 && |
4204 | reshape_completed >= (__le64_to_cpu(bsb.arraystart) + | |
7443ee81 N |
4205 | __le64_to_cpu(bsb.length))) |
4206 | forget_backup(dests, destfd, | |
4207 | destoffsets, 0); | |
b3cf095a N |
4208 | if (__le64_to_cpu(bsb.length2) > 0 && |
4209 | reshape_completed >= (__le64_to_cpu(bsb.arraystart2) + | |
7443ee81 N |
4210 | __le64_to_cpu(bsb.length2))) |
4211 | forget_backup(dests, destfd, | |
4212 | destoffsets, 1); | |
4213 | } else { | |
b3cf095a N |
4214 | if (__le64_to_cpu(bsb.length) > 0 && |
4215 | reshape_completed <= (__le64_to_cpu(bsb.arraystart))) | |
7443ee81 N |
4216 | forget_backup(dests, destfd, |
4217 | destoffsets, 0); | |
b3cf095a N |
4218 | if (__le64_to_cpu(bsb.length2) > 0 && |
4219 | reshape_completed <= (__le64_to_cpu(bsb.arraystart2))) | |
7443ee81 N |
4220 | forget_backup(dests, destfd, |
4221 | destoffsets, 1); | |
4222 | } | |
7236ee7a | 4223 | |
223c5c99 | 4224 | if (rv < 0) { |
77a73a17 N |
4225 | if (rv == -1) |
4226 | done = 1; | |
223c5c99 N |
4227 | break; |
4228 | } | |
2d4de5f9 N |
4229 | if (rv == 0 && increasing && !st->ss->external) { |
4230 | /* No longer need to monitor this reshape */ | |
4231 | done = 1; | |
4232 | break; | |
4233 | } | |
223c5c99 | 4234 | |
60204e4e | 4235 | while (rv) { |
7443ee81 | 4236 | unsigned long long offset; |
e97ca002 | 4237 | unsigned long actual_stripes; |
60204e4e N |
4238 | /* Need to backup some data. |
4239 | * If 'part' is not used and the desired | |
4240 | * backup size is suspended, do a backup, | |
4241 | * then consider the next part. | |
4242 | */ | |
7443ee81 N |
4243 | /* Check that 'part' is unused */ |
4244 | if (part == 0 && __le64_to_cpu(bsb.length) != 0) | |
60204e4e | 4245 | break; |
7443ee81 | 4246 | if (part == 1 && __le64_to_cpu(bsb.length2) != 0) |
60204e4e | 4247 | break; |
7443ee81 N |
4248 | |
4249 | offset = backup_point / data; | |
e97ca002 | 4250 | actual_stripes = stripes; |
60204e4e | 4251 | if (increasing) { |
e97ca002 N |
4252 | if (offset + actual_stripes * (chunk/512) > |
4253 | sra->component_size) | |
4254 | actual_stripes = ((sra->component_size - offset) | |
4255 | / (chunk/512)); | |
4256 | if (offset + actual_stripes * (chunk/512) > | |
60204e4e N |
4257 | suspend_point/data) |
4258 | break; | |
4259 | } else { | |
e97ca002 N |
4260 | if (offset < actual_stripes * (chunk/512)) |
4261 | actual_stripes = offset / (chunk/512); | |
4262 | offset -= actual_stripes * (chunk/512); | |
4263 | if (offset < suspend_point/data) | |
60204e4e N |
4264 | break; |
4265 | } | |
e4b11073 N |
4266 | if (actual_stripes == 0) |
4267 | break; | |
e97ca002 | 4268 | grow_backup(sra, offset, actual_stripes, |
7443ee81 N |
4269 | fds, offsets, |
4270 | disks, chunk, level, layout, | |
4271 | dests, destfd, destoffsets, | |
4272 | part, °raded, buf); | |
4273 | validate(afd, destfd[0], destoffsets[0]); | |
4274 | /* record where 'part' is up to */ | |
4275 | part = !part; | |
4276 | if (increasing) | |
e97ca002 | 4277 | backup_point += actual_stripes * (chunk/512) * data; |
7443ee81 | 4278 | else |
e97ca002 | 4279 | backup_point -= actual_stripes * (chunk/512) * data; |
7443ee81 N |
4280 | } |
4281 | } | |
4282 | ||
223c5c99 N |
4283 | /* FIXME maybe call progress_reshape one more time instead */ |
4284 | abort_reshape(sra); /* remove any remaining suspension */ | |
7443ee81 N |
4285 | if (reshape->before.data_disks == reshape->after.data_disks) |
4286 | sysfs_set_num(sra, NULL, "sync_speed_min", speed); | |
7236ee7a | 4287 | free(buf); |
77a73a17 | 4288 | return done; |
e86c9dd6 | 4289 | } |
353632d9 NB |
4290 | |
4291 | /* | |
4292 | * If any spare contains md_back_data-1 which is recent wrt mtime, | |
4293 | * write that data into the array and update the super blocks with | |
4294 | * the new reshape_progress | |
4295 | */ | |
ea0ebe96 N |
4296 | int Grow_restart(struct supertype *st, struct mdinfo *info, int *fdlist, int cnt, |
4297 | char *backup_file, int verbose) | |
353632d9 NB |
4298 | { |
4299 | int i, j; | |
4300 | int old_disks; | |
353632d9 | 4301 | unsigned long long *offsets; |
82f2d6ab | 4302 | unsigned long long nstripe, ostripe; |
6e9eac4f | 4303 | int ndata, odata; |
353632d9 | 4304 | |
e9e43ec3 N |
4305 | odata = info->array.raid_disks - info->delta_disks - 1; |
4306 | if (info->array.level == 6) odata--; /* number of data disks */ | |
4307 | ndata = info->array.raid_disks - 1; | |
4308 | if (info->new_level == 6) ndata--; | |
353632d9 NB |
4309 | |
4310 | old_disks = info->array.raid_disks - info->delta_disks; | |
4311 | ||
e9e43ec3 N |
4312 | if (info->delta_disks <= 0) |
4313 | /* Didn't grow, so the backup file must have | |
4314 | * been used | |
4315 | */ | |
4316 | old_disks = cnt; | |
06b0d786 | 4317 | for (i=old_disks-(backup_file?1:0); i<cnt; i++) { |
353632d9 | 4318 | struct mdinfo dinfo; |
06b0d786 | 4319 | int fd; |
e9e43ec3 | 4320 | int bsbsize; |
ea0ebe96 | 4321 | char *devname, namebuf[20]; |
10af14c4 | 4322 | unsigned long long lo, hi; |
353632d9 NB |
4323 | |
4324 | /* This was a spare and may have some saved data on it. | |
4325 | * Load the superblock, find and load the | |
4326 | * backup_super_block. | |
4327 | * If either fail, go on to next device. | |
4328 | * If the backup contains no new info, just return | |
206c5eae | 4329 | * else restore data and update all superblocks |
353632d9 | 4330 | */ |
06b0d786 NB |
4331 | if (i == old_disks-1) { |
4332 | fd = open(backup_file, O_RDONLY); | |
e9e43ec3 | 4333 | if (fd<0) { |
e7b84f9d | 4334 | pr_err("backup file %s inaccessible: %s\n", |
e9e43ec3 | 4335 | backup_file, strerror(errno)); |
06b0d786 | 4336 | continue; |
e9e43ec3 | 4337 | } |
ea0ebe96 | 4338 | devname = backup_file; |
06b0d786 NB |
4339 | } else { |
4340 | fd = fdlist[i]; | |
4341 | if (fd < 0) | |
4342 | continue; | |
3da92f27 | 4343 | if (st->ss->load_super(st, fd, NULL)) |
06b0d786 | 4344 | continue; |
353632d9 | 4345 | |
a5d85af7 | 4346 | st->ss->getinfo_super(st, &dinfo, NULL); |
3da92f27 NB |
4347 | st->ss->free_super(st); |
4348 | ||
06b0d786 NB |
4349 | if (lseek64(fd, |
4350 | (dinfo.data_offset + dinfo.component_size - 8) <<9, | |
ea0ebe96 | 4351 | 0) < 0) { |
e7b84f9d | 4352 | pr_err("Cannot seek on device %d\n", i); |
06b0d786 | 4353 | continue; /* Cannot seek */ |
ea0ebe96 N |
4354 | } |
4355 | sprintf(namebuf, "device-%d", i); | |
4356 | devname = namebuf; | |
06b0d786 | 4357 | } |
ea0ebe96 N |
4358 | if (read(fd, &bsb, sizeof(bsb)) != sizeof(bsb)) { |
4359 | if (verbose) | |
e7b84f9d | 4360 | pr_err("Cannot read from %s\n", devname); |
353632d9 | 4361 | continue; /* Cannot read */ |
ea0ebe96 | 4362 | } |
e9e43ec3 | 4363 | if (memcmp(bsb.magic, "md_backup_data-1", 16) != 0 && |
ea0ebe96 N |
4364 | memcmp(bsb.magic, "md_backup_data-2", 16) != 0) { |
4365 | if (verbose) | |
e7b84f9d | 4366 | pr_err("No backup metadata on %s\n", devname); |
353632d9 | 4367 | continue; |
ea0ebe96 N |
4368 | } |
4369 | if (bsb.sb_csum != bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb))) { | |
4370 | if (verbose) | |
e7b84f9d | 4371 | pr_err("Bad backup-metadata checksum on %s\n", devname); |
353632d9 | 4372 | continue; /* bad checksum */ |
ea0ebe96 | 4373 | } |
e9e43ec3 | 4374 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0 && |
ea0ebe96 N |
4375 | bsb.sb_csum2 != bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum2)-((char*)&bsb))) { |
4376 | if (verbose) | |
e7b84f9d | 4377 | pr_err("Bad backup-metadata checksum2 on %s\n", devname); |
22e30516 | 4378 | continue; /* Bad second checksum */ |
ea0ebe96 N |
4379 | } |
4380 | if (memcmp(bsb.set_uuid,info->uuid, 16) != 0) { | |
4381 | if (verbose) | |
e7b84f9d | 4382 | pr_err("Wrong uuid on backup-metadata on %s\n", devname); |
353632d9 | 4383 | continue; /* Wrong uuid */ |
ea0ebe96 | 4384 | } |
353632d9 | 4385 | |
097075b6 N |
4386 | /* array utime and backup-mtime should be updated at much the same time, but it seems that |
4387 | * sometimes they aren't... So allow considerable flexability in matching, and allow | |
4388 | * this test to be overridden by an environment variable. | |
4389 | */ | |
f21e18ca N |
4390 | if (info->array.utime > (int)__le64_to_cpu(bsb.mtime) + 2*60*60 || |
4391 | info->array.utime < (int)__le64_to_cpu(bsb.mtime) - 10*60) { | |
097075b6 | 4392 | if (check_env("MDADM_GROW_ALLOW_OLD")) { |
e7b84f9d | 4393 | pr_err("accepting backup with timestamp %lu " |
097075b6 N |
4394 | "for array with timestamp %lu\n", |
4395 | (unsigned long)__le64_to_cpu(bsb.mtime), | |
4396 | (unsigned long)info->array.utime); | |
4397 | } else { | |
676ab312 N |
4398 | pr_err("too-old timestamp on backup-metadata on %s\n", devname); |
4399 | pr_err("If you think it is should be safe, try 'export MDADM_GROW_ALLOW_OLD=1'\n"); | |
097075b6 N |
4400 | continue; /* time stamp is too bad */ |
4401 | } | |
ea0ebe96 | 4402 | } |
353632d9 | 4403 | |
e9e43ec3 | 4404 | if (bsb.magic[15] == '1') { |
10af14c4 N |
4405 | if (bsb.length == 0) |
4406 | continue; | |
e7a71c6b N |
4407 | if (info->delta_disks >= 0) { |
4408 | /* reshape_progress is increasing */ | |
4409 | if (__le64_to_cpu(bsb.arraystart) | |
4410 | + __le64_to_cpu(bsb.length) | |
4411 | < info->reshape_progress) { | |
4412 | nonew: | |
4413 | if (verbose) | |
e7b84f9d | 4414 | pr_err("backup-metadata found on %s but is not needed\n", devname); |
e7a71c6b N |
4415 | continue; /* No new data here */ |
4416 | } | |
4417 | } else { | |
4418 | /* reshape_progress is decreasing */ | |
4419 | if (__le64_to_cpu(bsb.arraystart) >= | |
4420 | info->reshape_progress) | |
4421 | goto nonew; /* No new data here */ | |
ea0ebe96 | 4422 | } |
e9e43ec3 | 4423 | } else { |
10af14c4 N |
4424 | if (bsb.length == 0 && bsb.length2 == 0) |
4425 | continue; | |
e7a71c6b N |
4426 | if (info->delta_disks >= 0) { |
4427 | /* reshape_progress is increasing */ | |
4428 | if ((__le64_to_cpu(bsb.arraystart) | |
4429 | + __le64_to_cpu(bsb.length) | |
4430 | < info->reshape_progress) | |
4431 | && | |
4432 | (__le64_to_cpu(bsb.arraystart2) | |
4433 | + __le64_to_cpu(bsb.length2) | |
4434 | < info->reshape_progress)) | |
4435 | goto nonew; /* No new data here */ | |
4436 | } else { | |
4437 | /* reshape_progress is decreasing */ | |
4438 | if (__le64_to_cpu(bsb.arraystart) >= | |
4439 | info->reshape_progress && | |
4440 | __le64_to_cpu(bsb.arraystart2) >= | |
4441 | info->reshape_progress) | |
4442 | goto nonew; /* No new data here */ | |
4443 | } | |
e9e43ec3 | 4444 | } |
ea0ebe96 N |
4445 | if (lseek64(fd, __le64_to_cpu(bsb.devstart)*512, 0)< 0) { |
4446 | second_fail: | |
4447 | if (verbose) | |
e7b84f9d N |
4448 | pr_err("Failed to verify secondary backup-metadata block on %s\n", |
4449 | devname); | |
353632d9 | 4450 | continue; /* Cannot seek */ |
ea0ebe96 | 4451 | } |
2efedc7b | 4452 | /* There should be a duplicate backup superblock 4k before here */ |
06b0d786 | 4453 | if (lseek64(fd, -4096, 1) < 0 || |
0155af90 | 4454 | read(fd, &bsb2, sizeof(bsb2)) != sizeof(bsb2)) |
ea0ebe96 | 4455 | goto second_fail; /* Cannot find leading superblock */ |
e9e43ec3 N |
4456 | if (bsb.magic[15] == '1') |
4457 | bsbsize = offsetof(struct mdp_backup_super, pad1); | |
4458 | else | |
4459 | bsbsize = offsetof(struct mdp_backup_super, pad); | |
ff94fb86 | 4460 | if (memcmp(&bsb2, &bsb, bsbsize) != 0) |
ea0ebe96 | 4461 | goto second_fail; /* Cannot find leading superblock */ |
2efedc7b | 4462 | |
353632d9 | 4463 | /* Now need the data offsets for all devices. */ |
503975b9 | 4464 | offsets = xmalloc(sizeof(*offsets)*info->array.raid_disks); |
353632d9 NB |
4465 | for(j=0; j<info->array.raid_disks; j++) { |
4466 | if (fdlist[j] < 0) | |
4467 | continue; | |
3da92f27 | 4468 | if (st->ss->load_super(st, fdlist[j], NULL)) |
353632d9 NB |
4469 | /* FIXME should be this be an error */ |
4470 | continue; | |
a5d85af7 | 4471 | st->ss->getinfo_super(st, &dinfo, NULL); |
3da92f27 | 4472 | st->ss->free_super(st); |
14e5b4d7 | 4473 | offsets[j] = dinfo.data_offset * 512; |
353632d9 NB |
4474 | } |
4475 | printf(Name ": restoring critical section\n"); | |
4476 | ||
4477 | if (restore_stripes(fdlist, offsets, | |
4478 | info->array.raid_disks, | |
4479 | info->new_chunk, | |
4480 | info->new_level, | |
4481 | info->new_layout, | |
06b0d786 | 4482 | fd, __le64_to_cpu(bsb.devstart)*512, |
92dcdf7c | 4483 | __le64_to_cpu(bsb.arraystart)*512, |
2fcb75ae | 4484 | __le64_to_cpu(bsb.length)*512, NULL)) { |
e9e43ec3 | 4485 | /* didn't succeed, so giveup */ |
ea0ebe96 | 4486 | if (verbose) |
e7b84f9d | 4487 | pr_err("Error restoring backup from %s\n", |
ea0ebe96 | 4488 | devname); |
730ae51f | 4489 | free(offsets); |
e9e43ec3 N |
4490 | return 1; |
4491 | } | |
24daa16f | 4492 | |
e9e43ec3 N |
4493 | if (bsb.magic[15] == '2' && |
4494 | restore_stripes(fdlist, offsets, | |
4495 | info->array.raid_disks, | |
4496 | info->new_chunk, | |
4497 | info->new_level, | |
4498 | info->new_layout, | |
4499 | fd, __le64_to_cpu(bsb.devstart)*512 + | |
4500 | __le64_to_cpu(bsb.devstart2)*512, | |
92dcdf7c | 4501 | __le64_to_cpu(bsb.arraystart2)*512, |
2fcb75ae | 4502 | __le64_to_cpu(bsb.length2)*512, NULL)) { |
353632d9 | 4503 | /* didn't succeed, so giveup */ |
ea0ebe96 | 4504 | if (verbose) |
e7b84f9d | 4505 | pr_err("Error restoring second backup from %s\n", |
ea0ebe96 | 4506 | devname); |
730ae51f | 4507 | free(offsets); |
2295250a | 4508 | return 1; |
353632d9 NB |
4509 | } |
4510 | ||
730ae51f | 4511 | free(offsets); |
e9e43ec3 | 4512 | |
353632d9 NB |
4513 | /* Ok, so the data is restored. Let's update those superblocks. */ |
4514 | ||
10af14c4 N |
4515 | lo = hi = 0; |
4516 | if (bsb.length) { | |
4517 | lo = __le64_to_cpu(bsb.arraystart); | |
4518 | hi = lo + __le64_to_cpu(bsb.length); | |
4519 | } | |
4520 | if (bsb.magic[15] == '2' && bsb.length2) { | |
4521 | unsigned long long lo1, hi1; | |
4522 | lo1 = __le64_to_cpu(bsb.arraystart2); | |
4523 | hi1 = lo1 + __le64_to_cpu(bsb.length2); | |
4524 | if (lo == hi) { | |
4525 | lo = lo1; | |
4526 | hi = hi1; | |
4527 | } else if (lo < lo1) | |
4528 | hi = hi1; | |
4529 | else | |
4530 | lo = lo1; | |
4531 | } | |
4532 | if (lo < hi && | |
4533 | (info->reshape_progress < lo || | |
4534 | info->reshape_progress > hi)) | |
4535 | /* backup does not affect reshape_progress*/ ; | |
4536 | else if (info->delta_disks >= 0) { | |
e9e43ec3 N |
4537 | info->reshape_progress = __le64_to_cpu(bsb.arraystart) + |
4538 | __le64_to_cpu(bsb.length); | |
4539 | if (bsb.magic[15] == '2') { | |
4540 | unsigned long long p2 = __le64_to_cpu(bsb.arraystart2) + | |
4541 | __le64_to_cpu(bsb.length2); | |
4542 | if (p2 > info->reshape_progress) | |
4543 | info->reshape_progress = p2; | |
4544 | } | |
4545 | } else { | |
4546 | info->reshape_progress = __le64_to_cpu(bsb.arraystart); | |
4547 | if (bsb.magic[15] == '2') { | |
4548 | unsigned long long p2 = __le64_to_cpu(bsb.arraystart2); | |
4549 | if (p2 < info->reshape_progress) | |
4550 | info->reshape_progress = p2; | |
4551 | } | |
4552 | } | |
353632d9 | 4553 | for (j=0; j<info->array.raid_disks; j++) { |
ca3b6696 N |
4554 | if (fdlist[j] < 0) |
4555 | continue; | |
3da92f27 | 4556 | if (st->ss->load_super(st, fdlist[j], NULL)) |
353632d9 | 4557 | continue; |
a5d85af7 | 4558 | st->ss->getinfo_super(st, &dinfo, NULL); |
e9e43ec3 | 4559 | dinfo.reshape_progress = info->reshape_progress; |
3da92f27 | 4560 | st->ss->update_super(st, &dinfo, |
68c7d6d7 NB |
4561 | "_reshape_progress", |
4562 | NULL,0, 0, NULL); | |
3da92f27 NB |
4563 | st->ss->store_super(st, fdlist[j]); |
4564 | st->ss->free_super(st); | |
353632d9 | 4565 | } |
353632d9 NB |
4566 | return 0; |
4567 | } | |
6e9eac4f NB |
4568 | /* Didn't find any backup data, try to see if any |
4569 | * was needed. | |
4570 | */ | |
82f2d6ab N |
4571 | if (info->delta_disks < 0) { |
4572 | /* When shrinking, the critical section is at the end. | |
4573 | * So see if we are before the critical section. | |
4574 | */ | |
4575 | unsigned long long first_block; | |
4576 | nstripe = ostripe = 0; | |
4577 | first_block = 0; | |
4578 | while (ostripe >= nstripe) { | |
4579 | ostripe += info->array.chunk_size / 512; | |
4580 | first_block = ostripe * odata; | |
4581 | nstripe = first_block / ndata / (info->new_chunk/512) * | |
4582 | (info->new_chunk/512); | |
4583 | } | |
4584 | ||
4585 | if (info->reshape_progress >= first_block) | |
4586 | return 0; | |
6e9eac4f | 4587 | } |
82f2d6ab N |
4588 | if (info->delta_disks > 0) { |
4589 | /* See if we are beyond the critical section. */ | |
4590 | unsigned long long last_block; | |
4591 | nstripe = ostripe = 0; | |
4592 | last_block = 0; | |
4593 | while (nstripe >= ostripe) { | |
4594 | nstripe += info->new_chunk / 512; | |
4595 | last_block = nstripe * ndata; | |
4596 | ostripe = last_block / odata / (info->array.chunk_size/512) * | |
4597 | (info->array.chunk_size/512); | |
4598 | } | |
6e9eac4f | 4599 | |
82f2d6ab N |
4600 | if (info->reshape_progress >= last_block) |
4601 | return 0; | |
4602 | } | |
6e9eac4f | 4603 | /* needed to recover critical section! */ |
ea0ebe96 | 4604 | if (verbose) |
e7b84f9d | 4605 | pr_err("Failed to find backup of critical section\n"); |
2295250a | 4606 | return 1; |
353632d9 | 4607 | } |
e9e43ec3 | 4608 | |
2dddadb0 AK |
4609 | int Grow_continue_command(char *devname, int fd, |
4610 | char *backup_file, int verbose) | |
4611 | { | |
4612 | int ret_val = 0; | |
4613 | struct supertype *st = NULL; | |
4614 | struct mdinfo *content = NULL; | |
4615 | struct mdinfo array; | |
4616 | char *subarray = NULL; | |
4617 | struct mdinfo *cc = NULL; | |
4618 | struct mdstat_ent *mdstat = NULL; | |
2dddadb0 AK |
4619 | int cfd = -1; |
4620 | int fd2 = -1; | |
4621 | ||
4622 | dprintf("Grow continue from command line called for %s\n", | |
4623 | devname); | |
4624 | ||
4625 | st = super_by_fd(fd, &subarray); | |
4626 | if (!st || !st->ss) { | |
e7b84f9d N |
4627 | pr_err("Unable to determine metadata format for %s\n", |
4628 | devname); | |
2dddadb0 AK |
4629 | return 1; |
4630 | } | |
4631 | dprintf("Grow continue is run for "); | |
4632 | if (st->ss->external == 0) { | |
e0ab37a3 | 4633 | int d; |
2dddadb0 | 4634 | dprintf("native array (%s)\n", devname); |
e0ab37a3 | 4635 | if (ioctl(fd, GET_ARRAY_INFO, &array.array) < 0) { |
e7b84f9d | 4636 | pr_err("%s is not an active md array -" |
2dddadb0 AK |
4637 | " aborting\n", devname); |
4638 | ret_val = 1; | |
4639 | goto Grow_continue_command_exit; | |
4640 | } | |
4641 | content = &array; | |
e0ab37a3 N |
4642 | /* Need to load a superblock. |
4643 | * FIXME we should really get what we need from | |
4644 | * sysfs | |
4645 | */ | |
4646 | for (d = 0; d < MAX_DISKS; d++) { | |
4647 | mdu_disk_info_t disk; | |
4648 | char *dv; | |
4649 | int err; | |
4650 | disk.number = d; | |
4651 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
4652 | continue; | |
4653 | if (disk.major == 0 && disk.minor == 0) | |
4654 | continue; | |
4655 | if ((disk.state & (1 << MD_DISK_ACTIVE)) == 0) | |
4656 | continue; | |
4657 | dv = map_dev(disk.major, disk.minor, 1); | |
4658 | if (!dv) | |
4659 | continue; | |
4660 | fd2 = dev_open(dv, O_RDONLY); | |
4661 | if (fd2 < 0) | |
4662 | continue; | |
4663 | err = st->ss->load_super(st, fd2, NULL); | |
4664 | close(fd2); | |
4665 | if (err) | |
4666 | continue; | |
4667 | break; | |
4668 | } | |
4669 | if (d == MAX_DISKS) { | |
4670 | pr_err("Unable to load metadata for %s\n", | |
4671 | devname); | |
4672 | ret_val = 1; | |
4673 | goto Grow_continue_command_exit; | |
4674 | } | |
4675 | st->ss->getinfo_super(st, content, NULL); | |
2dddadb0 | 4676 | } else { |
4dd2df09 | 4677 | char *container; |
2dddadb0 AK |
4678 | |
4679 | if (subarray) { | |
4680 | dprintf("subarray (%s)\n", subarray); | |
4dd2df09 N |
4681 | container = st->container_devnm; |
4682 | cfd = open_dev_excl(st->container_devnm); | |
2dddadb0 | 4683 | } else { |
4dd2df09 | 4684 | container = st->devnm; |
2dddadb0 | 4685 | close(fd); |
4dd2df09 N |
4686 | cfd = open_dev_excl(st->devnm); |
4687 | dprintf("container (%s)\n", container); | |
2dddadb0 AK |
4688 | fd = cfd; |
4689 | } | |
4690 | if (cfd < 0) { | |
e7b84f9d | 4691 | pr_err("Unable to open container " |
2dddadb0 AK |
4692 | "for %s\n", devname); |
4693 | ret_val = 1; | |
4694 | goto Grow_continue_command_exit; | |
4695 | } | |
2dddadb0 AK |
4696 | |
4697 | /* find in container array under reshape | |
4698 | */ | |
4699 | ret_val = st->ss->load_container(st, cfd, NULL); | |
4700 | if (ret_val) { | |
e7b84f9d N |
4701 | pr_err("Cannot read superblock for %s\n", |
4702 | devname); | |
2dddadb0 AK |
4703 | ret_val = 1; |
4704 | goto Grow_continue_command_exit; | |
4705 | } | |
4706 | ||
446894ea | 4707 | cc = st->ss->container_content(st, subarray); |
2dddadb0 AK |
4708 | for (content = cc; content ; content = content->next) { |
4709 | char *array; | |
446894ea | 4710 | int allow_reshape = 1; |
2dddadb0 AK |
4711 | |
4712 | if (content->reshape_active == 0) | |
4713 | continue; | |
81219e70 LM |
4714 | /* The decision about array or container wide |
4715 | * reshape is taken in Grow_continue based | |
4716 | * content->reshape_active state, therefore we | |
4717 | * need to check_reshape based on | |
4718 | * reshape_active and subarray name | |
446894ea N |
4719 | */ |
4720 | if (content->array.state & (1<<MD_SB_BLOCK_VOLUME)) | |
4721 | allow_reshape = 0; | |
4722 | if (content->reshape_active == CONTAINER_RESHAPE && | |
4723 | (content->array.state | |
4724 | & (1<<MD_SB_BLOCK_CONTAINER_RESHAPE))) | |
4725 | allow_reshape = 0; | |
4726 | ||
81219e70 | 4727 | if (!allow_reshape) { |
e7b84f9d N |
4728 | pr_err("cannot continue reshape of an array" |
4729 | " in container with unsupported" | |
4730 | " metadata: %s(%s)\n", | |
4dd2df09 | 4731 | devname, container); |
81219e70 LM |
4732 | ret_val = 1; |
4733 | goto Grow_continue_command_exit; | |
4734 | } | |
2dddadb0 AK |
4735 | |
4736 | array = strchr(content->text_version+1, '/')+1; | |
4dd2df09 | 4737 | mdstat = mdstat_by_subdev(array, container); |
2dddadb0 AK |
4738 | if (!mdstat) |
4739 | continue; | |
1ca90aa6 | 4740 | if (mdstat->active == 0) { |
4dd2df09 N |
4741 | pr_err("Skipping inactive array %s.\n", |
4742 | mdstat->devnm); | |
1ca90aa6 AK |
4743 | free_mdstat(mdstat); |
4744 | mdstat = NULL; | |
4745 | continue; | |
4746 | } | |
2dddadb0 AK |
4747 | break; |
4748 | } | |
4749 | if (!content) { | |
e7b84f9d N |
4750 | pr_err("Unable to determine reshaped " |
4751 | "array for %s\n", devname); | |
2dddadb0 AK |
4752 | ret_val = 1; |
4753 | goto Grow_continue_command_exit; | |
4754 | } | |
4dd2df09 | 4755 | fd2 = open_dev(mdstat->devnm); |
2dddadb0 | 4756 | if (fd2 < 0) { |
4dd2df09 | 4757 | pr_err("cannot open (%s)\n", mdstat->devnm); |
2dddadb0 AK |
4758 | ret_val = 1; |
4759 | goto Grow_continue_command_exit; | |
4760 | } | |
4761 | ||
4dd2df09 | 4762 | sysfs_init(content, fd2, mdstat->devnm); |
2dddadb0 AK |
4763 | |
4764 | /* start mdmon in case it is not running | |
4765 | */ | |
4dd2df09 N |
4766 | if (!mdmon_running(container)) |
4767 | start_mdmon(container); | |
4768 | ping_monitor(container); | |
2dddadb0 | 4769 | |
4dd2df09 | 4770 | if (mdmon_running(container)) |
2dddadb0 AK |
4771 | st->update_tail = &st->updates; |
4772 | else { | |
e7b84f9d | 4773 | pr_err("No mdmon found. " |
2dddadb0 AK |
4774 | "Grow cannot continue.\n"); |
4775 | ret_val = 1; | |
4776 | goto Grow_continue_command_exit; | |
4777 | } | |
4778 | } | |
4779 | ||
f1fe496b AK |
4780 | /* verify that array under reshape is started from |
4781 | * correct position | |
4782 | */ | |
e0ab37a3 | 4783 | if (verify_reshape_position(content, content->array.level) < 0) { |
f1fe496b AK |
4784 | ret_val = 1; |
4785 | goto Grow_continue_command_exit; | |
4786 | } | |
4787 | ||
2dddadb0 AK |
4788 | /* continue reshape |
4789 | */ | |
4790 | ret_val = Grow_continue(fd, st, content, backup_file, 0); | |
4791 | ||
4792 | Grow_continue_command_exit: | |
4793 | if (fd2 > -1) | |
4794 | close(fd2); | |
4795 | if (cfd > -1) | |
4796 | close(cfd); | |
4797 | st->ss->free_super(st); | |
4798 | free_mdstat(mdstat); | |
4799 | sysfs_free(cc); | |
4800 | free(subarray); | |
4801 | ||
4802 | return ret_val; | |
4803 | } | |
4804 | ||
e9e43ec3 | 4805 | int Grow_continue(int mdfd, struct supertype *st, struct mdinfo *info, |
b76b30e0 | 4806 | char *backup_file, int freeze_reshape) |
e9e43ec3 | 4807 | { |
3bd58dc6 AK |
4808 | int ret_val = 2; |
4809 | ||
4810 | if (!info->reshape_active) | |
4811 | return ret_val; | |
864a004f | 4812 | |
20a40eca | 4813 | if (st->ss->external) { |
4dd2df09 | 4814 | int cfd = open_dev(st->container_devnm); |
3db2fdd8 | 4815 | |
3bd58dc6 AK |
4816 | if (cfd < 0) |
4817 | return 1; | |
f362d22b | 4818 | |
4dd2df09 | 4819 | st->ss->load_container(st, cfd, st->container_devnm); |
3bd58dc6 | 4820 | close(cfd); |
4dd2df09 | 4821 | ret_val = reshape_container(st->container_devnm, NULL, mdfd, |
3bd58dc6 | 4822 | st, info, 0, backup_file, |
8ecf12b9 N |
4823 | 0, |
4824 | 1 | info->reshape_active, | |
4825 | freeze_reshape); | |
3bd58dc6 AK |
4826 | } else |
4827 | ret_val = reshape_array(NULL, mdfd, "array", st, info, 1, | |
8ecf12b9 N |
4828 | NULL, 0ULL, backup_file, 0, 0, |
4829 | 1 | info->reshape_active, | |
3bd58dc6 | 4830 | freeze_reshape); |
f362d22b | 4831 | |
3bd58dc6 | 4832 | return ret_val; |
e9e43ec3 | 4833 | } |