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Commit | Line | Data |
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e5329c37 NB |
1 | /* |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
6f02172d | 4 | * Copyright (C) 2001-2013 Neil Brown <neilb@suse.de> |
e5329c37 NB |
5 | * |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | * Author: Neil Brown | |
e736b623 | 22 | * Email: <neilb@suse.de> |
e5329c37 NB |
23 | */ |
24 | #include "mdadm.h" | |
25 | #include "dlink.h" | |
7236ee7a | 26 | #include <sys/mman.h> |
04f903b2 | 27 | #include <stddef.h> |
f9b08fec | 28 | #include <stdint.h> |
84d11e6c | 29 | #include <signal.h> |
5e76dce1 | 30 | #include <sys/wait.h> |
e5329c37 NB |
31 | |
32 | #if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN) | |
33 | #error no endian defined | |
34 | #endif | |
35 | #include "md_u.h" | |
36 | #include "md_p.h" | |
37 | ||
3f54bd62 AK |
38 | int restore_backup(struct supertype *st, |
39 | struct mdinfo *content, | |
40 | int working_disks, | |
41 | int next_spare, | |
54ded86f | 42 | char **backup_filep, |
3f54bd62 AK |
43 | int verbose) |
44 | { | |
45 | int i; | |
46 | int *fdlist; | |
47 | struct mdinfo *dev; | |
48 | int err; | |
49 | int disk_count = next_spare + working_disks; | |
54ded86f | 50 | char *backup_file = *backup_filep; |
3f54bd62 AK |
51 | |
52 | dprintf("Called restore_backup()\n"); | |
503975b9 N |
53 | fdlist = xmalloc(sizeof(int) * disk_count); |
54 | ||
a7dec3fd | 55 | enable_fds(next_spare); |
3f54bd62 AK |
56 | for (i = 0; i < next_spare; i++) |
57 | fdlist[i] = -1; | |
58 | for (dev = content->devs; dev; dev = dev->next) { | |
59 | char buf[22]; | |
60 | int fd; | |
61 | sprintf(buf, "%d:%d", | |
62 | dev->disk.major, | |
63 | dev->disk.minor); | |
64 | fd = dev_open(buf, O_RDWR); | |
65 | ||
66 | if (dev->disk.raid_disk >= 0) | |
67 | fdlist[dev->disk.raid_disk] = fd; | |
68 | else | |
69 | fdlist[next_spare++] = fd; | |
70 | } | |
71 | ||
54ded86f N |
72 | if (!backup_file) { |
73 | backup_file = locate_backup(content->sys_name); | |
74 | *backup_filep = backup_file; | |
75 | } | |
76 | ||
3f54bd62 AK |
77 | if (st->ss->external && st->ss->recover_backup) |
78 | err = st->ss->recover_backup(st, content); | |
79 | else | |
80 | err = Grow_restart(st, content, fdlist, next_spare, | |
81 | backup_file, verbose > 0); | |
82 | ||
83 | while (next_spare > 0) { | |
cc7f63e5 N |
84 | next_spare--; |
85 | if (fdlist[next_spare] >= 0) | |
86 | close(fdlist[next_spare]); | |
3f54bd62 AK |
87 | } |
88 | free(fdlist); | |
89 | if (err) { | |
7a862a02 | 90 | pr_err("Failed to restore critical section for reshape - sorry.\n"); |
3f54bd62 | 91 | if (!backup_file) |
7a862a02 | 92 | pr_err("Possibly you need to specify a --backup-file\n"); |
3f54bd62 AK |
93 | return 1; |
94 | } | |
95 | ||
96 | dprintf("restore_backup() returns status OK.\n"); | |
97 | return 0; | |
98 | } | |
99 | ||
e5329c37 NB |
100 | int Grow_Add_device(char *devname, int fd, char *newdev) |
101 | { | |
102 | /* Add a device to an active array. | |
103 | * Currently, just extend a linear array. | |
104 | * This requires writing a new superblock on the | |
105 | * new device, calling the kernel to add the device, | |
106 | * and if that succeeds, update the superblock on | |
107 | * all other devices. | |
108 | * This means that we need to *find* all other devices. | |
109 | */ | |
4b1ac34b NB |
110 | struct mdinfo info; |
111 | ||
e5329c37 NB |
112 | struct stat stb; |
113 | int nfd, fd2; | |
114 | int d, nd; | |
82d9eba6 | 115 | struct supertype *st = NULL; |
4725bc31 | 116 | char *subarray = NULL; |
e5329c37 | 117 | |
4b1ac34b | 118 | if (ioctl(fd, GET_ARRAY_INFO, &info.array) < 0) { |
e7b84f9d | 119 | pr_err("cannot get array info for %s\n", devname); |
e5329c37 NB |
120 | return 1; |
121 | } | |
122 | ||
4725bc31 | 123 | if (info.array.level != -1) { |
e7b84f9d | 124 | pr_err("can only add devices to linear arrays\n"); |
4725bc31 N |
125 | return 1; |
126 | } | |
127 | ||
128 | st = super_by_fd(fd, &subarray); | |
82d9eba6 | 129 | if (!st) { |
ca3b6696 N |
130 | pr_err("cannot handle arrays with superblock version %d\n", |
131 | info.array.major_version); | |
f9ce90ba NB |
132 | return 1; |
133 | } | |
134 | ||
4725bc31 | 135 | if (subarray) { |
e7b84f9d | 136 | pr_err("Cannot grow linear sub-arrays yet\n"); |
4725bc31 N |
137 | free(subarray); |
138 | free(st); | |
2641101b | 139 | return 1; |
e5329c37 NB |
140 | } |
141 | ||
6416d527 | 142 | nfd = open(newdev, O_RDWR|O_EXCL|O_DIRECT); |
e5329c37 | 143 | if (nfd < 0) { |
e7b84f9d | 144 | pr_err("cannot open %s\n", newdev); |
4725bc31 | 145 | free(st); |
e5329c37 NB |
146 | return 1; |
147 | } | |
148 | fstat(nfd, &stb); | |
149 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
e7b84f9d | 150 | pr_err("%s is not a block device!\n", newdev); |
e5329c37 | 151 | close(nfd); |
4725bc31 | 152 | free(st); |
e5329c37 NB |
153 | return 1; |
154 | } | |
ca3b6696 N |
155 | /* now check out all the devices and make sure we can read the |
156 | * superblock */ | |
4b1ac34b | 157 | for (d=0 ; d < info.array.raid_disks ; d++) { |
e5329c37 NB |
158 | mdu_disk_info_t disk; |
159 | char *dv; | |
160 | ||
4725bc31 N |
161 | st->ss->free_super(st); |
162 | ||
e5329c37 NB |
163 | disk.number = d; |
164 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) { | |
e7b84f9d | 165 | pr_err("cannot get device detail for device %d\n", |
e5329c37 | 166 | d); |
4725bc31 N |
167 | close(nfd); |
168 | free(st); | |
e5329c37 NB |
169 | return 1; |
170 | } | |
16c6fa80 | 171 | dv = map_dev(disk.major, disk.minor, 1); |
e5329c37 | 172 | if (!dv) { |
e7b84f9d | 173 | pr_err("cannot find device file for device %d\n", |
e5329c37 | 174 | d); |
4725bc31 N |
175 | close(nfd); |
176 | free(st); | |
e5329c37 NB |
177 | return 1; |
178 | } | |
16c6fa80 | 179 | fd2 = dev_open(dv, O_RDWR); |
68fe8c6e | 180 | if (fd2 < 0) { |
e7b84f9d | 181 | pr_err("cannot open device file %s\n", dv); |
4725bc31 N |
182 | close(nfd); |
183 | free(st); | |
e5329c37 NB |
184 | return 1; |
185 | } | |
3da92f27 NB |
186 | |
187 | if (st->ss->load_super(st, fd2, NULL)) { | |
e7b84f9d | 188 | pr_err("cannot find super block on %s\n", dv); |
4725bc31 | 189 | close(nfd); |
e5329c37 | 190 | close(fd2); |
4725bc31 | 191 | free(st); |
e5329c37 NB |
192 | return 1; |
193 | } | |
194 | close(fd2); | |
195 | } | |
196 | /* Ok, looks good. Lets update the superblock and write it out to | |
197 | * newdev. | |
198 | */ | |
aba69144 | 199 | |
4b1ac34b NB |
200 | info.disk.number = d; |
201 | info.disk.major = major(stb.st_rdev); | |
202 | info.disk.minor = minor(stb.st_rdev); | |
203 | info.disk.raid_disk = d; | |
204 | info.disk.state = (1 << MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE); | |
3da92f27 | 205 | st->ss->update_super(st, &info, "linear-grow-new", newdev, |
f752781f | 206 | 0, 0, NULL); |
e5329c37 | 207 | |
3da92f27 | 208 | if (st->ss->store_super(st, nfd)) { |
e7b84f9d | 209 | pr_err("Cannot store new superblock on %s\n", |
f752781f | 210 | newdev); |
e5329c37 NB |
211 | close(nfd); |
212 | return 1; | |
213 | } | |
e5329c37 | 214 | close(nfd); |
4b1ac34b NB |
215 | |
216 | if (ioctl(fd, ADD_NEW_DISK, &info.disk) != 0) { | |
e7b84f9d | 217 | pr_err("Cannot add new disk to this array\n"); |
e5329c37 NB |
218 | return 1; |
219 | } | |
220 | /* Well, that seems to have worked. | |
221 | * Now go through and update all superblocks | |
222 | */ | |
223 | ||
4b1ac34b | 224 | if (ioctl(fd, GET_ARRAY_INFO, &info.array) < 0) { |
e7b84f9d | 225 | pr_err("cannot get array info for %s\n", devname); |
e5329c37 NB |
226 | return 1; |
227 | } | |
228 | ||
229 | nd = d; | |
4b1ac34b | 230 | for (d=0 ; d < info.array.raid_disks ; d++) { |
e5329c37 NB |
231 | mdu_disk_info_t disk; |
232 | char *dv; | |
233 | ||
234 | disk.number = d; | |
235 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) { | |
e7b84f9d | 236 | pr_err("cannot get device detail for device %d\n", |
e5329c37 NB |
237 | d); |
238 | return 1; | |
239 | } | |
16c6fa80 | 240 | dv = map_dev(disk.major, disk.minor, 1); |
e5329c37 | 241 | if (!dv) { |
e7b84f9d | 242 | pr_err("cannot find device file for device %d\n", |
e5329c37 NB |
243 | d); |
244 | return 1; | |
245 | } | |
16c6fa80 | 246 | fd2 = dev_open(dv, O_RDWR); |
e5329c37 | 247 | if (fd2 < 0) { |
e7b84f9d | 248 | pr_err("cannot open device file %s\n", dv); |
e5329c37 NB |
249 | return 1; |
250 | } | |
3da92f27 | 251 | if (st->ss->load_super(st, fd2, NULL)) { |
e7b84f9d | 252 | pr_err("cannot find super block on %s\n", dv); |
e5329c37 NB |
253 | close(fd); |
254 | return 1; | |
255 | } | |
4b1ac34b NB |
256 | info.array.raid_disks = nd+1; |
257 | info.array.nr_disks = nd+1; | |
258 | info.array.active_disks = nd+1; | |
259 | info.array.working_disks = nd+1; | |
f752781f | 260 | |
3da92f27 | 261 | st->ss->update_super(st, &info, "linear-grow-update", dv, |
f752781f | 262 | 0, 0, NULL); |
aba69144 | 263 | |
3da92f27 | 264 | if (st->ss->store_super(st, fd2)) { |
e7b84f9d | 265 | pr_err("Cannot store new superblock on %s\n", dv); |
e5329c37 NB |
266 | close(fd2); |
267 | return 1; | |
268 | } | |
269 | close(fd2); | |
270 | } | |
271 | ||
272 | return 0; | |
273 | } | |
f5e166fe | 274 | |
50f01ba5 | 275 | int Grow_addbitmap(char *devname, int fd, struct context *c, struct shape *s) |
f5e166fe NB |
276 | { |
277 | /* | |
278 | * First check that array doesn't have a bitmap | |
279 | * Then create the bitmap | |
280 | * Then add it | |
281 | * | |
282 | * For internal bitmaps, we need to check the version, | |
283 | * find all the active devices, and write the bitmap block | |
284 | * to all devices | |
285 | */ | |
286 | mdu_bitmap_file_t bmf; | |
287 | mdu_array_info_t array; | |
288 | struct supertype *st; | |
4725bc31 | 289 | char *subarray = NULL; |
dcec9ee5 NB |
290 | int major = BITMAP_MAJOR_HI; |
291 | int vers = md_get_version(fd); | |
8fac0577 | 292 | unsigned long long bitmapsize, array_size; |
dcec9ee5 NB |
293 | |
294 | if (vers < 9003) { | |
295 | major = BITMAP_MAJOR_HOSTENDIAN; | |
7a862a02 N |
296 | pr_err("Warning - bitmaps created on this kernel are not portable\n" |
297 | " between different architectures. Consider upgrading the Linux kernel.\n"); | |
dcec9ee5 | 298 | } |
f5e166fe | 299 | |
6d9c7c25 GR |
300 | if (s->bitmap_file && strcmp(s->bitmap_file, "clustered") == 0) |
301 | major = BITMAP_MAJOR_CLUSTERED; | |
302 | ||
f5e166fe | 303 | if (ioctl(fd, GET_BITMAP_FILE, &bmf) != 0) { |
353632d9 | 304 | if (errno == ENOMEM) |
e7b84f9d | 305 | pr_err("Memory allocation failure.\n"); |
f5e166fe | 306 | else |
e7b84f9d | 307 | pr_err("bitmaps not supported by this kernel.\n"); |
f5e166fe NB |
308 | return 1; |
309 | } | |
310 | if (bmf.pathname[0]) { | |
50f01ba5 | 311 | if (strcmp(s->bitmap_file,"none")==0) { |
fe80f49b | 312 | if (ioctl(fd, SET_BITMAP_FILE, -1)!= 0) { |
e7b84f9d | 313 | pr_err("failed to remove bitmap %s\n", |
fe80f49b NB |
314 | bmf.pathname); |
315 | return 1; | |
316 | } | |
317 | return 0; | |
318 | } | |
e7b84f9d | 319 | pr_err("%s already has a bitmap (%s)\n", |
f5e166fe NB |
320 | devname, bmf.pathname); |
321 | return 1; | |
322 | } | |
323 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0) { | |
e7b84f9d | 324 | pr_err("cannot get array status for %s\n", devname); |
f5e166fe NB |
325 | return 1; |
326 | } | |
327 | if (array.state & (1<<MD_SB_BITMAP_PRESENT)) { | |
50f01ba5 | 328 | if (strcmp(s->bitmap_file, "none")==0) { |
fe80f49b NB |
329 | array.state &= ~(1<<MD_SB_BITMAP_PRESENT); |
330 | if (ioctl(fd, SET_ARRAY_INFO, &array)!= 0) { | |
37d0ca9b GJ |
331 | if (array.state & (1<<MD_SB_CLUSTERED)) |
332 | pr_err("failed to remove clustered bitmap.\n"); | |
333 | else | |
334 | pr_err("failed to remove internal bitmap.\n"); | |
fe80f49b NB |
335 | return 1; |
336 | } | |
337 | return 0; | |
338 | } | |
37d0ca9b | 339 | pr_err("bitmap already present on %s\n", devname); |
f5e166fe NB |
340 | return 1; |
341 | } | |
4725bc31 | 342 | |
50f01ba5 | 343 | if (strcmp(s->bitmap_file, "none") == 0) { |
e7b84f9d | 344 | pr_err("no bitmap found on %s\n", devname); |
4725bc31 N |
345 | return 1; |
346 | } | |
5b28bd56 | 347 | if (array.level <= 0) { |
e7b84f9d | 348 | pr_err("Bitmaps not meaningful with level %s\n", |
5b28bd56 NB |
349 | map_num(pers, array.level)?:"of this array"); |
350 | return 1; | |
351 | } | |
8fac0577 NB |
352 | bitmapsize = array.size; |
353 | bitmapsize <<= 1; | |
beae1dfe | 354 | if (get_dev_size(fd, NULL, &array_size) && |
8fac0577 NB |
355 | array_size > (0x7fffffffULL<<9)) { |
356 | /* Array is big enough that we cannot trust array.size | |
357 | * try other approaches | |
358 | */ | |
359 | bitmapsize = get_component_size(fd); | |
360 | } | |
8fac0577 | 361 | if (bitmapsize == 0) { |
e7b84f9d | 362 | pr_err("Cannot reliably determine size of array to create bitmap - sorry.\n"); |
8fac0577 NB |
363 | return 1; |
364 | } | |
365 | ||
f9c25f1d | 366 | if (array.level == 10) { |
8686f3ed | 367 | int ncopies = (array.layout&255)*((array.layout>>8)&255); |
f9c25f1d NB |
368 | bitmapsize = bitmapsize * array.raid_disks / ncopies; |
369 | } | |
370 | ||
4725bc31 | 371 | st = super_by_fd(fd, &subarray); |
f5e166fe | 372 | if (!st) { |
e7b84f9d | 373 | pr_err("Cannot understand version %d.%d\n", |
f5e166fe NB |
374 | array.major_version, array.minor_version); |
375 | return 1; | |
376 | } | |
4725bc31 | 377 | if (subarray) { |
e7b84f9d | 378 | pr_err("Cannot add bitmaps to sub-arrays yet\n"); |
4725bc31 N |
379 | free(subarray); |
380 | free(st); | |
fe80f49b | 381 | return 1; |
4725bc31 | 382 | } |
7c25f4d7 GJ |
383 | if (strcmp(s->bitmap_file, "internal") == 0 || |
384 | strcmp(s->bitmap_file, "clustered") == 0) { | |
c0c1acd6 | 385 | int rv; |
f5e166fe | 386 | int d; |
c0c1acd6 N |
387 | int offset_setable = 0; |
388 | struct mdinfo *mdi; | |
ebeb3663 | 389 | if (st->ss->add_internal_bitmap == NULL) { |
7a862a02 | 390 | pr_err("Internal bitmaps not supported with %s metadata\n", st->ss->name); |
ebeb3663 N |
391 | return 1; |
392 | } | |
7c25f4d7 GJ |
393 | st->nodes = c->nodes; |
394 | st->cluster_name = c->homecluster; | |
4dd2df09 | 395 | mdi = sysfs_read(fd, NULL, GET_BITMAP_LOCATION); |
c0c1acd6 N |
396 | if (mdi) |
397 | offset_setable = 1; | |
ea329559 | 398 | for (d=0; d< st->max_devs; d++) { |
f5e166fe NB |
399 | mdu_disk_info_t disk; |
400 | char *dv; | |
401 | disk.number = d; | |
402 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
403 | continue; | |
404 | if (disk.major == 0 && | |
405 | disk.minor == 0) | |
406 | continue; | |
407 | if ((disk.state & (1<<MD_DISK_SYNC))==0) | |
408 | continue; | |
16c6fa80 | 409 | dv = map_dev(disk.major, disk.minor, 1); |
f5e166fe | 410 | if (dv) { |
16c6fa80 | 411 | int fd2 = dev_open(dv, O_RDWR); |
f5e166fe NB |
412 | if (fd2 < 0) |
413 | continue; | |
3da92f27 | 414 | if (st->ss->load_super(st, fd2, NULL)==0) { |
199171a2 | 415 | if (st->ss->add_internal_bitmap( |
3da92f27 | 416 | st, |
50f01ba5 | 417 | &s->bitmap_chunk, c->delay, s->write_behind, |
c0c1acd6 N |
418 | bitmapsize, offset_setable, |
419 | major) | |
199171a2 | 420 | ) |
0aa2f15b | 421 | st->ss->write_bitmap(st, fd2, NoUpdate); |
21e92547 | 422 | else { |
7a862a02 | 423 | pr_err("failed to create internal bitmap - chunksize problem.\n"); |
21e92547 NB |
424 | close(fd2); |
425 | return 1; | |
426 | } | |
f5e166fe NB |
427 | } |
428 | close(fd2); | |
429 | } | |
430 | } | |
c0c1acd6 N |
431 | if (offset_setable) { |
432 | st->ss->getinfo_super(st, mdi, NULL); | |
4dd2df09 | 433 | sysfs_init(mdi, fd, NULL); |
012a8641 JS |
434 | rv = sysfs_set_num_signed(mdi, NULL, "bitmap/location", |
435 | mdi->bitmap_offset); | |
c0c1acd6 | 436 | } else { |
7c25f4d7 GJ |
437 | if (strcmp(s->bitmap_file, "clustered") == 0) |
438 | array.state |= (1<<MD_SB_CLUSTERED); | |
c0c1acd6 N |
439 | array.state |= (1<<MD_SB_BITMAP_PRESENT); |
440 | rv = ioctl(fd, SET_ARRAY_INFO, &array); | |
441 | } | |
442 | if (rv < 0) { | |
ff634064 | 443 | if (errno == EBUSY) |
7a862a02 | 444 | pr_err("Cannot add bitmap while array is resyncing or reshaping etc.\n"); |
e7b84f9d | 445 | pr_err("failed to set internal bitmap.\n"); |
f5e166fe NB |
446 | return 1; |
447 | } | |
fe80f49b NB |
448 | } else { |
449 | int uuid[4]; | |
450 | int bitmap_fd; | |
451 | int d; | |
452 | int max_devs = st->max_devs; | |
fe80f49b NB |
453 | |
454 | /* try to load a superblock */ | |
ca3b6696 | 455 | for (d = 0; d < max_devs; d++) { |
fe80f49b NB |
456 | mdu_disk_info_t disk; |
457 | char *dv; | |
458 | int fd2; | |
459 | disk.number = d; | |
460 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
461 | continue; | |
462 | if ((disk.major==0 && disk.minor==0) || | |
463 | (disk.state & (1<<MD_DISK_REMOVED))) | |
464 | continue; | |
16c6fa80 | 465 | dv = map_dev(disk.major, disk.minor, 1); |
ca3b6696 N |
466 | if (!dv) |
467 | continue; | |
16c6fa80 | 468 | fd2 = dev_open(dv, O_RDONLY); |
e7344e90 JS |
469 | if (fd2 >= 0) { |
470 | if (st->ss->load_super(st, fd2, NULL) == 0) { | |
471 | close(fd2); | |
472 | st->ss->uuid_from_super(st, uuid); | |
473 | break; | |
474 | } | |
fe80f49b | 475 | close(fd2); |
fe80f49b | 476 | } |
fe80f49b NB |
477 | } |
478 | if (d == max_devs) { | |
e7b84f9d | 479 | pr_err("cannot find UUID for array!\n"); |
fe80f49b NB |
480 | return 1; |
481 | } | |
50f01ba5 N |
482 | if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, s->bitmap_chunk, |
483 | c->delay, s->write_behind, bitmapsize, major)) { | |
fe80f49b NB |
484 | return 1; |
485 | } | |
50f01ba5 | 486 | bitmap_fd = open(s->bitmap_file, O_RDWR); |
fe80f49b | 487 | if (bitmap_fd < 0) { |
e7b84f9d | 488 | pr_err("weird: %s cannot be opened\n", |
50f01ba5 | 489 | s->bitmap_file); |
fe80f49b NB |
490 | return 1; |
491 | } | |
492 | if (ioctl(fd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
ff634064 N |
493 | int err = errno; |
494 | if (errno == EBUSY) | |
7a862a02 | 495 | pr_err("Cannot add bitmap while array is resyncing or reshaping etc.\n"); |
e7b84f9d | 496 | pr_err("Cannot set bitmap file for %s: %s\n", |
ff634064 | 497 | devname, strerror(err)); |
fe80f49b NB |
498 | return 1; |
499 | } | |
500 | } | |
f5e166fe NB |
501 | |
502 | return 0; | |
503 | } | |
504 | ||
e86c9dd6 NB |
505 | /* |
506 | * When reshaping an array we might need to backup some data. | |
507 | * This is written to all spares with a 'super_block' describing it. | |
ff94fb86 | 508 | * The superblock goes 4K from the end of the used space on the |
e86c9dd6 NB |
509 | * device. |
510 | * It if written after the backup is complete. | |
511 | * It has the following structure. | |
512 | */ | |
513 | ||
5fdf37e3 | 514 | static struct mdp_backup_super { |
7236ee7a | 515 | char magic[16]; /* md_backup_data-1 or -2 */ |
e86c9dd6 NB |
516 | __u8 set_uuid[16]; |
517 | __u64 mtime; | |
518 | /* start/sizes in 512byte sectors */ | |
7236ee7a | 519 | __u64 devstart; /* address on backup device/file of data */ |
e86c9dd6 NB |
520 | __u64 arraystart; |
521 | __u64 length; | |
522 | __u32 sb_csum; /* csum of preceeding bytes. */ | |
7236ee7a N |
523 | __u32 pad1; |
524 | __u64 devstart2; /* offset in to data of second section */ | |
525 | __u64 arraystart2; | |
526 | __u64 length2; | |
527 | __u32 sb_csum2; /* csum of preceeding bytes. */ | |
528 | __u8 pad[512-68-32]; | |
5fdf37e3 | 529 | } __attribute__((aligned(512))) bsb, bsb2; |
e86c9dd6 | 530 | |
4411fb17 | 531 | static __u32 bsb_csum(char *buf, int len) |
e86c9dd6 NB |
532 | { |
533 | int i; | |
534 | int csum = 0; | |
ca3b6696 | 535 | for (i = 0; i < len; i++) |
e86c9dd6 NB |
536 | csum = (csum<<3) + buf[0]; |
537 | return __cpu_to_le32(csum); | |
538 | } | |
539 | ||
d7ca196c N |
540 | static int check_idle(struct supertype *st) |
541 | { | |
542 | /* Check that all member arrays for this container, or the | |
543 | * container of this array, are idle | |
544 | */ | |
4dd2df09 N |
545 | char *container = (st->container_devnm[0] |
546 | ? st->container_devnm : st->devnm); | |
d7ca196c N |
547 | struct mdstat_ent *ent, *e; |
548 | int is_idle = 1; | |
24daa16f | 549 | |
d7ca196c N |
550 | ent = mdstat_read(0, 0); |
551 | for (e = ent ; e; e = e->next) { | |
552 | if (!is_container_member(e, container)) | |
553 | continue; | |
554 | if (e->percent >= 0) { | |
555 | is_idle = 0; | |
556 | break; | |
557 | } | |
558 | } | |
559 | free_mdstat(ent); | |
560 | return is_idle; | |
561 | } | |
562 | ||
7f2ba464 | 563 | static int freeze_container(struct supertype *st) |
7236ee7a | 564 | { |
4dd2df09 N |
565 | char *container = (st->container_devnm[0] |
566 | ? st->container_devnm : st->devnm); | |
7f2ba464 | 567 | |
d7ca196c N |
568 | if (!check_idle(st)) |
569 | return -1; | |
24daa16f | 570 | |
7f2ba464 | 571 | if (block_monitor(container, 1)) { |
e7b84f9d | 572 | pr_err("failed to freeze container\n"); |
7f2ba464 DW |
573 | return -2; |
574 | } | |
575 | ||
576 | return 1; | |
577 | } | |
578 | ||
579 | static void unfreeze_container(struct supertype *st) | |
580 | { | |
4dd2df09 N |
581 | char *container = (st->container_devnm[0] |
582 | ? st->container_devnm : st->devnm); | |
7f2ba464 DW |
583 | |
584 | unblock_monitor(container, 1); | |
585 | } | |
586 | ||
587 | static int freeze(struct supertype *st) | |
588 | { | |
589 | /* Try to freeze resync/rebuild on this array/container. | |
7236ee7a | 590 | * Return -1 if the array is busy, |
7f2ba464 | 591 | * return -2 container cannot be frozen, |
7236ee7a N |
592 | * return 0 if this kernel doesn't support 'frozen' |
593 | * return 1 if it worked. | |
594 | */ | |
7f2ba464 DW |
595 | if (st->ss->external) |
596 | return freeze_container(st); | |
597 | else { | |
4dd2df09 | 598 | struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION); |
7f2ba464 | 599 | int err; |
815c8a7e | 600 | char buf[20]; |
7f2ba464 DW |
601 | |
602 | if (!sra) | |
603 | return -1; | |
815c8a7e N |
604 | /* Need to clear any 'read-auto' status */ |
605 | if (sysfs_get_str(sra, NULL, "array_state", buf, 20) > 0 && | |
606 | strncmp(buf, "read-auto", 9) == 0) | |
607 | sysfs_set_str(sra, NULL, "array_state", "clean"); | |
608 | ||
7f2ba464 DW |
609 | err = sysfs_freeze_array(sra); |
610 | sysfs_free(sra); | |
611 | return err; | |
612 | } | |
7236ee7a N |
613 | } |
614 | ||
9202b8eb | 615 | static void unfreeze(struct supertype *st) |
7236ee7a | 616 | { |
7f2ba464 DW |
617 | if (st->ss->external) |
618 | return unfreeze_container(st); | |
619 | else { | |
4dd2df09 | 620 | struct mdinfo *sra = sysfs_read(-1, st->devnm, GET_VERSION); |
5e7be838 | 621 | char buf[20]; |
7f2ba464 | 622 | |
5e7be838 N |
623 | if (sra && |
624 | sysfs_get_str(sra, NULL, "sync_action", buf, 20) > 0 | |
62844a4d | 625 | && strcmp(buf, "frozen\n") == 0) |
7f2ba464 | 626 | sysfs_set_str(sra, NULL, "sync_action", "idle"); |
7f2ba464 DW |
627 | sysfs_free(sra); |
628 | } | |
7236ee7a N |
629 | } |
630 | ||
4411fb17 | 631 | static void wait_reshape(struct mdinfo *sra) |
7236ee7a N |
632 | { |
633 | int fd = sysfs_get_fd(sra, NULL, "sync_action"); | |
634 | char action[20]; | |
635 | ||
92a19f1a AK |
636 | if (fd < 0) |
637 | return; | |
638 | ||
efc67e8e N |
639 | while (sysfs_fd_get_str(fd, action, 20) > 0 && |
640 | strncmp(action, "reshape", 7) == 0) | |
641 | sysfs_wait(fd, NULL); | |
92a19f1a | 642 | close(fd); |
7236ee7a | 643 | } |
7bc71196 | 644 | |
7ec0996c LD |
645 | static int reshape_super(struct supertype *st, unsigned long long size, |
646 | int level, int layout, int chunksize, int raid_disks, | |
41784c88 | 647 | int delta_disks, char *backup_file, char *dev, |
016e00f5 | 648 | int direction, int verbose) |
7bc71196 DW |
649 | { |
650 | /* nothing extra to check in the native case */ | |
651 | if (!st->ss->external) | |
652 | return 0; | |
653 | if (!st->ss->reshape_super || | |
654 | !st->ss->manage_reshape) { | |
e7b84f9d | 655 | pr_err("%s metadata does not support reshape\n", |
7bc71196 DW |
656 | st->ss->name); |
657 | return 1; | |
658 | } | |
659 | ||
660 | return st->ss->reshape_super(st, size, level, layout, chunksize, | |
41784c88 | 661 | raid_disks, delta_disks, backup_file, dev, |
016e00f5 | 662 | direction, verbose); |
7bc71196 DW |
663 | } |
664 | ||
665 | static void sync_metadata(struct supertype *st) | |
666 | { | |
667 | if (st->ss->external) { | |
76266030 | 668 | if (st->update_tail) { |
7bc71196 | 669 | flush_metadata_updates(st); |
76266030 N |
670 | st->update_tail = &st->updates; |
671 | } else | |
7bc71196 DW |
672 | st->ss->sync_metadata(st); |
673 | } | |
674 | } | |
675 | ||
676 | static int subarray_set_num(char *container, struct mdinfo *sra, char *name, int n) | |
677 | { | |
678 | /* when dealing with external metadata subarrays we need to be | |
679 | * prepared to handle EAGAIN. The kernel may need to wait for | |
680 | * mdmon to mark the array active so the kernel can handle | |
681 | * allocations/writeback when preparing the reshape action | |
682 | * (md_allow_write()). We temporarily disable safe_mode_delay | |
683 | * to close a race with the array_state going clean before the | |
684 | * next write to raid_disks / stripe_cache_size | |
685 | */ | |
686 | char safe[50]; | |
687 | int rc; | |
688 | ||
689 | /* only 'raid_disks' and 'stripe_cache_size' trigger md_allow_write */ | |
5da9ab98 N |
690 | if (!container || |
691 | (strcmp(name, "raid_disks") != 0 && | |
692 | strcmp(name, "stripe_cache_size") != 0)) | |
7bc71196 DW |
693 | return sysfs_set_num(sra, NULL, name, n); |
694 | ||
695 | rc = sysfs_get_str(sra, NULL, "safe_mode_delay", safe, sizeof(safe)); | |
696 | if (rc <= 0) | |
697 | return -1; | |
698 | sysfs_set_num(sra, NULL, "safe_mode_delay", 0); | |
699 | rc = sysfs_set_num(sra, NULL, name, n); | |
700 | if (rc < 0 && errno == EAGAIN) { | |
701 | ping_monitor(container); | |
702 | /* if we get EAGAIN here then the monitor is not active | |
703 | * so stop trying | |
704 | */ | |
705 | rc = sysfs_set_num(sra, NULL, name, n); | |
706 | } | |
707 | sysfs_set_str(sra, NULL, "safe_mode_delay", safe); | |
708 | return rc; | |
709 | } | |
710 | ||
27a1e5b5 N |
711 | int start_reshape(struct mdinfo *sra, int already_running, |
712 | int before_data_disks, int data_disks) | |
47eb4d5a N |
713 | { |
714 | int err; | |
6937e6d2 AK |
715 | unsigned long long sync_max_to_set; |
716 | ||
0f28668b | 717 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); |
6937e6d2 AK |
718 | err = sysfs_set_num(sra, NULL, "suspend_hi", sra->reshape_progress); |
719 | err = err ?: sysfs_set_num(sra, NULL, "suspend_lo", | |
720 | sra->reshape_progress); | |
27a1e5b5 N |
721 | if (before_data_disks <= data_disks) |
722 | sync_max_to_set = sra->reshape_progress / data_disks; | |
723 | else | |
724 | sync_max_to_set = (sra->component_size * data_disks | |
725 | - sra->reshape_progress) / data_disks; | |
1e971e71 | 726 | if (!already_running) |
6937e6d2 AK |
727 | sysfs_set_num(sra, NULL, "sync_min", sync_max_to_set); |
728 | err = err ?: sysfs_set_num(sra, NULL, "sync_max", sync_max_to_set); | |
ada38ebb N |
729 | if (!already_running && err == 0) { |
730 | int cnt = 5; | |
731 | do { | |
732 | err = sysfs_set_str(sra, NULL, "sync_action", "reshape"); | |
733 | if (err) | |
734 | sleep(1); | |
735 | } while (err && errno == EBUSY && cnt-- > 0); | |
736 | } | |
47eb4d5a N |
737 | return err; |
738 | } | |
739 | ||
740 | void abort_reshape(struct mdinfo *sra) | |
741 | { | |
742 | sysfs_set_str(sra, NULL, "sync_action", "idle"); | |
743 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); | |
744 | sysfs_set_num(sra, NULL, "suspend_hi", 0); | |
745 | sysfs_set_num(sra, NULL, "suspend_lo", 0); | |
746 | sysfs_set_num(sra, NULL, "sync_min", 0); | |
84d11e6c N |
747 | // It isn't safe to reset sync_max as we aren't monitoring. |
748 | // Array really should be stopped at this point. | |
47eb4d5a N |
749 | } |
750 | ||
dfe77a9e KW |
751 | int remove_disks_for_takeover(struct supertype *st, |
752 | struct mdinfo *sra, | |
753 | int layout) | |
62a48395 AK |
754 | { |
755 | int nr_of_copies; | |
756 | struct mdinfo *remaining; | |
757 | int slot; | |
758 | ||
dfe77a9e KW |
759 | if (sra->array.level == 10) |
760 | nr_of_copies = layout & 0xff; | |
761 | else if (sra->array.level == 1) | |
762 | nr_of_copies = sra->array.raid_disks; | |
763 | else | |
764 | return 1; | |
62a48395 AK |
765 | |
766 | remaining = sra->devs; | |
767 | sra->devs = NULL; | |
768 | /* for each 'copy', select one device and remove from the list. */ | |
769 | for (slot = 0; slot < sra->array.raid_disks; slot += nr_of_copies) { | |
770 | struct mdinfo **diskp; | |
771 | int found = 0; | |
772 | ||
773 | /* Find a working device to keep */ | |
774 | for (diskp = &remaining; *diskp ; diskp = &(*diskp)->next) { | |
775 | struct mdinfo *disk = *diskp; | |
776 | ||
777 | if (disk->disk.raid_disk < slot) | |
778 | continue; | |
779 | if (disk->disk.raid_disk >= slot + nr_of_copies) | |
780 | continue; | |
781 | if (disk->disk.state & (1<<MD_DISK_REMOVED)) | |
782 | continue; | |
783 | if (disk->disk.state & (1<<MD_DISK_FAULTY)) | |
784 | continue; | |
785 | if (!(disk->disk.state & (1<<MD_DISK_SYNC))) | |
786 | continue; | |
787 | ||
788 | /* We have found a good disk to use! */ | |
789 | *diskp = disk->next; | |
790 | disk->next = sra->devs; | |
791 | sra->devs = disk; | |
792 | found = 1; | |
793 | break; | |
794 | } | |
795 | if (!found) | |
796 | break; | |
797 | } | |
798 | ||
799 | if (slot < sra->array.raid_disks) { | |
800 | /* didn't find all slots */ | |
801 | struct mdinfo **e; | |
802 | e = &remaining; | |
803 | while (*e) | |
804 | e = &(*e)->next; | |
805 | *e = sra->devs; | |
806 | sra->devs = remaining; | |
807 | return 1; | |
808 | } | |
809 | ||
810 | /* Remove all 'remaining' devices from the array */ | |
811 | while (remaining) { | |
812 | struct mdinfo *sd = remaining; | |
813 | remaining = sd->next; | |
814 | ||
815 | sysfs_set_str(sra, sd, "state", "faulty"); | |
816 | sysfs_set_str(sra, sd, "slot", "none"); | |
d5ca4a23 KW |
817 | /* for external metadata disks should be removed in mdmon */ |
818 | if (!st->ss->external) | |
819 | sysfs_set_str(sra, sd, "state", "remove"); | |
62a48395 AK |
820 | sd->disk.state |= (1<<MD_DISK_REMOVED); |
821 | sd->disk.state &= ~(1<<MD_DISK_SYNC); | |
822 | sd->next = sra->devs; | |
823 | sra->devs = sd; | |
824 | } | |
825 | return 0; | |
826 | } | |
827 | ||
130994cb AK |
828 | void reshape_free_fdlist(int *fdlist, |
829 | unsigned long long *offsets, | |
830 | int size) | |
831 | { | |
832 | int i; | |
833 | ||
834 | for (i = 0; i < size; i++) | |
835 | if (fdlist[i] >= 0) | |
836 | close(fdlist[i]); | |
837 | ||
838 | free(fdlist); | |
839 | free(offsets); | |
840 | } | |
841 | ||
842 | int reshape_prepare_fdlist(char *devname, | |
843 | struct mdinfo *sra, | |
844 | int raid_disks, | |
845 | int nrdisks, | |
846 | unsigned long blocks, | |
847 | char *backup_file, | |
848 | int *fdlist, | |
849 | unsigned long long *offsets) | |
850 | { | |
851 | int d = 0; | |
852 | struct mdinfo *sd; | |
853 | ||
a7dec3fd | 854 | enable_fds(nrdisks); |
130994cb AK |
855 | for (d = 0; d <= nrdisks; d++) |
856 | fdlist[d] = -1; | |
857 | d = raid_disks; | |
858 | for (sd = sra->devs; sd; sd = sd->next) { | |
859 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
860 | continue; | |
8e7ddc5f N |
861 | if (sd->disk.state & (1<<MD_DISK_SYNC) && |
862 | sd->disk.raid_disk < raid_disks) { | |
130994cb AK |
863 | char *dn = map_dev(sd->disk.major, |
864 | sd->disk.minor, 1); | |
865 | fdlist[sd->disk.raid_disk] | |
866 | = dev_open(dn, O_RDONLY); | |
867 | offsets[sd->disk.raid_disk] = sd->data_offset*512; | |
868 | if (fdlist[sd->disk.raid_disk] < 0) { | |
e7b84f9d N |
869 | pr_err("%s: cannot open component %s\n", |
870 | devname, dn ? dn : "-unknown-"); | |
130994cb AK |
871 | d = -1; |
872 | goto release; | |
873 | } | |
874 | } else if (backup_file == NULL) { | |
875 | /* spare */ | |
876 | char *dn = map_dev(sd->disk.major, | |
877 | sd->disk.minor, 1); | |
878 | fdlist[d] = dev_open(dn, O_RDWR); | |
879 | offsets[d] = (sd->data_offset + sra->component_size - blocks - 8)*512; | |
880 | if (fdlist[d] < 0) { | |
e7b84f9d | 881 | pr_err("%s: cannot open component %s\n", |
130994cb AK |
882 | devname, dn ? dn : "-unknown-"); |
883 | d = -1; | |
884 | goto release; | |
885 | } | |
886 | d++; | |
887 | } | |
888 | } | |
889 | release: | |
890 | return d; | |
891 | } | |
892 | ||
e6e9d47b AK |
893 | int reshape_open_backup_file(char *backup_file, |
894 | int fd, | |
895 | char *devname, | |
896 | long blocks, | |
897 | int *fdlist, | |
a93f87ee | 898 | unsigned long long *offsets, |
54ded86f | 899 | char *sys_name, |
a93f87ee | 900 | int restart) |
e6e9d47b AK |
901 | { |
902 | /* Return 1 on success, 0 on any form of failure */ | |
903 | /* need to check backup file is large enough */ | |
904 | char buf[512]; | |
905 | struct stat stb; | |
906 | unsigned int dev; | |
907 | int i; | |
908 | ||
a93f87ee | 909 | *fdlist = open(backup_file, O_RDWR|O_CREAT|(restart ? O_TRUNC : O_EXCL), |
e6e9d47b AK |
910 | S_IRUSR | S_IWUSR); |
911 | *offsets = 8 * 512; | |
912 | if (*fdlist < 0) { | |
e7b84f9d | 913 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
914 | devname, backup_file, strerror(errno)); |
915 | return 0; | |
916 | } | |
917 | /* Guard against backup file being on array device. | |
918 | * If array is partitioned or if LVM etc is in the | |
919 | * way this will not notice, but it is better than | |
920 | * nothing. | |
921 | */ | |
922 | fstat(*fdlist, &stb); | |
923 | dev = stb.st_dev; | |
924 | fstat(fd, &stb); | |
925 | if (stb.st_rdev == dev) { | |
7a862a02 | 926 | pr_err("backup file must NOT be on the array being reshaped.\n"); |
e6e9d47b AK |
927 | close(*fdlist); |
928 | return 0; | |
929 | } | |
930 | ||
931 | memset(buf, 0, 512); | |
ca4fe0bf | 932 | for (i=0; i < blocks + 8 ; i++) { |
e6e9d47b | 933 | if (write(*fdlist, buf, 512) != 512) { |
7a862a02 | 934 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
935 | devname, backup_file, strerror(errno)); |
936 | return 0; | |
937 | } | |
938 | } | |
939 | if (fsync(*fdlist) != 0) { | |
e7b84f9d | 940 | pr_err("%s: cannot create backup file %s: %s\n", |
e6e9d47b AK |
941 | devname, backup_file, strerror(errno)); |
942 | return 0; | |
943 | } | |
944 | ||
54ded86f N |
945 | if (!restart && strncmp(backup_file, MAP_DIR, strlen(MAP_DIR)) != 0) { |
946 | char *bu = make_backup(sys_name); | |
1e60caeb | 947 | if (symlink(backup_file, bu)) |
a5a6a7d9 | 948 | pr_err("Recording backup file in " MAP_DIR " failed: %s\n", |
1e60caeb | 949 | strerror(errno)); |
54ded86f N |
950 | free(bu); |
951 | } | |
952 | ||
e6e9d47b AK |
953 | return 1; |
954 | } | |
955 | ||
1c009fc2 AK |
956 | unsigned long compute_backup_blocks(int nchunk, int ochunk, |
957 | unsigned int ndata, unsigned int odata) | |
958 | { | |
959 | unsigned long a, b, blocks; | |
960 | /* So how much do we need to backup. | |
961 | * We need an amount of data which is both a whole number of | |
962 | * old stripes and a whole number of new stripes. | |
963 | * So LCM for (chunksize*datadisks). | |
964 | */ | |
965 | a = (ochunk/512) * odata; | |
966 | b = (nchunk/512) * ndata; | |
967 | /* Find GCD */ | |
b48e2e25 | 968 | a = GCD(a, b); |
1c009fc2 AK |
969 | /* LCM == product / GCD */ |
970 | blocks = (ochunk/512) * (nchunk/512) * odata * ndata / a; | |
971 | ||
972 | return blocks; | |
973 | } | |
974 | ||
a73b0081 | 975 | char *analyse_change(char *devname, struct mdinfo *info, struct reshape *re) |
5da9ab98 N |
976 | { |
977 | /* Based on the current array state in info->array and | |
978 | * the changes in info->new_* etc, determine: | |
979 | * - whether the change is possible | |
980 | * - Intermediate level/raid_disks/layout | |
981 | * - whether a restriping reshape is needed | |
982 | * - number of sectors in minimum change unit. This | |
983 | * will cover a whole number of stripes in 'before' and | |
984 | * 'after'. | |
985 | * | |
986 | * Return message if the change should be rejected | |
987 | * NULL if the change can be achieved | |
988 | * | |
989 | * This can be called as part of starting a reshape, or | |
990 | * when assembling an array that is undergoing reshape. | |
991 | */ | |
19ceb16d | 992 | int near, far, offset, copies; |
5da9ab98 | 993 | int new_disks; |
19ceb16d | 994 | int old_chunk, new_chunk; |
b545e14a N |
995 | /* delta_parity records change in number of devices |
996 | * caused by level change | |
997 | */ | |
998 | int delta_parity = 0; | |
5da9ab98 | 999 | |
6b2fc3c1 N |
1000 | memset(re, 0, sizeof(*re)); |
1001 | ||
5da9ab98 N |
1002 | /* If a new level not explicitly given, we assume no-change */ |
1003 | if (info->new_level == UnSet) | |
1004 | info->new_level = info->array.level; | |
1005 | ||
1006 | if (info->new_chunk) | |
1007 | switch (info->new_level) { | |
1008 | case 0: | |
1009 | case 4: | |
1010 | case 5: | |
1011 | case 6: | |
1012 | case 10: | |
1013 | /* chunk size is meaningful, must divide component_size | |
1014 | * evenly | |
1015 | */ | |
a73b0081 N |
1016 | if (info->component_size % (info->new_chunk/512)) { |
1017 | unsigned long long shrink = info->component_size; | |
1018 | shrink &= ~(unsigned long long)(info->new_chunk/512-1); | |
1019 | pr_err("New chunk size (%dK) does not evenly divide device size (%lluk)\n", | |
1020 | info->new_chunk/1024, info->component_size/2); | |
1021 | pr_err("After shrinking any filesystem, \"mdadm --grow %s --size %llu\"\n", | |
1022 | devname, shrink/2); | |
1023 | pr_err("will shrink the array so the given chunk size would work.\n"); | |
1024 | return ""; | |
1025 | } | |
5da9ab98 N |
1026 | break; |
1027 | default: | |
1028 | return "chunk size not meaningful for this level"; | |
1029 | } | |
1030 | else | |
1031 | info->new_chunk = info->array.chunk_size; | |
1032 | ||
1033 | switch (info->array.level) { | |
90b60dfa | 1034 | default: |
46643e1a N |
1035 | return "No reshape is possibly for this RAID level"; |
1036 | case LEVEL_LINEAR: | |
1037 | if (info->delta_disks != UnSet) | |
1038 | return "Only --add is supported for LINEAR, setting --raid-disks is not needed"; | |
1039 | else | |
1040 | return "Only --add is supported for LINEAR, other --grow options are not meaningful"; | |
5da9ab98 N |
1041 | case 1: |
1042 | /* RAID1 can convert to RAID1 with different disks, or | |
dfe77a9e KW |
1043 | * raid5 with 2 disks, or |
1044 | * raid0 with 1 disk | |
5da9ab98 | 1045 | */ |
5ca3a902 N |
1046 | if (info->new_level > 1 && |
1047 | (info->component_size & 7)) | |
7a862a02 | 1048 | return "Cannot convert RAID1 of this size - reduce size to multiple of 4K first."; |
dfe77a9e | 1049 | if (info->new_level == 0) { |
b545e14a N |
1050 | if (info->delta_disks != UnSet && |
1051 | info->delta_disks != 0) | |
7a862a02 | 1052 | return "Cannot change number of disks with RAID1->RAID0 conversion"; |
dfe77a9e KW |
1053 | re->level = 0; |
1054 | re->before.data_disks = 1; | |
1055 | re->after.data_disks = 1; | |
dfe77a9e KW |
1056 | return NULL; |
1057 | } | |
5da9ab98 N |
1058 | if (info->new_level == 1) { |
1059 | if (info->delta_disks == UnSet) | |
1060 | /* Don't know what to do */ | |
1061 | return "no change requested for Growing RAID1"; | |
1062 | re->level = 1; | |
5da9ab98 N |
1063 | return NULL; |
1064 | } | |
1065 | if (info->array.raid_disks == 2 && | |
446d2a5a | 1066 | info->new_level == 5) { |
5652f2d9 | 1067 | |
5da9ab98 | 1068 | re->level = 5; |
5da9ab98 | 1069 | re->before.data_disks = 1; |
5652f2d9 N |
1070 | if (info->delta_disks != UnSet && |
1071 | info->delta_disks != 0) | |
1072 | re->after.data_disks = 1 + info->delta_disks; | |
1073 | else | |
1074 | re->after.data_disks = 1; | |
1075 | if (re->after.data_disks < 1) | |
1076 | return "Number of disks too small for RAID5"; | |
1077 | ||
5da9ab98 | 1078 | re->before.layout = ALGORITHM_LEFT_SYMMETRIC; |
446d2a5a N |
1079 | info->array.chunk_size = 65536; |
1080 | break; | |
5da9ab98 N |
1081 | } |
1082 | /* Could do some multi-stage conversions, but leave that to | |
1083 | * later. | |
1084 | */ | |
1085 | return "Impossibly level change request for RAID1"; | |
1086 | ||
1087 | case 10: | |
19ceb16d N |
1088 | /* RAID10 can be converted from near mode to |
1089 | * RAID0 by removing some devices. | |
1090 | * It can also be reshaped if the kernel supports | |
1091 | * new_data_offset. | |
5da9ab98 | 1092 | */ |
19ceb16d N |
1093 | switch (info->new_level) { |
1094 | case 0: | |
1095 | if ((info->array.layout & ~0xff) != 0x100) | |
1096 | return "Cannot Grow RAID10 with far/offset layout"; | |
1097 | /* number of devices must be multiple of number of copies */ | |
1098 | if (info->array.raid_disks % (info->array.layout & 0xff)) | |
1099 | return "RAID10 layout too complex for Grow operation"; | |
1100 | ||
1101 | new_disks = (info->array.raid_disks | |
1102 | / (info->array.layout & 0xff)); | |
1103 | if (info->delta_disks == UnSet) | |
1104 | info->delta_disks = (new_disks | |
1105 | - info->array.raid_disks); | |
5da9ab98 | 1106 | |
19ceb16d N |
1107 | if (info->delta_disks != new_disks - info->array.raid_disks) |
1108 | return "New number of raid-devices impossible for RAID10"; | |
1109 | if (info->new_chunk && | |
1110 | info->new_chunk != info->array.chunk_size) | |
1111 | return "Cannot change chunk-size with RAID10 Grow"; | |
1112 | ||
1113 | /* looks good */ | |
1114 | re->level = 0; | |
19ceb16d N |
1115 | re->before.data_disks = new_disks; |
1116 | re->after.data_disks = re->before.data_disks; | |
19ceb16d N |
1117 | return NULL; |
1118 | ||
1119 | case 10: | |
1120 | near = info->array.layout & 0xff; | |
1121 | far = (info->array.layout >> 8) & 0xff; | |
1122 | offset = info->array.layout & 0x10000; | |
1123 | if (far > 1 && !offset) | |
1124 | return "Cannot reshape RAID10 in far-mode"; | |
1125 | copies = near * far; | |
1126 | ||
1127 | old_chunk = info->array.chunk_size * far; | |
1128 | ||
1129 | if (info->new_layout == UnSet) | |
1130 | info->new_layout = info->array.layout; | |
1131 | else { | |
1132 | near = info->new_layout & 0xff; | |
1133 | far = (info->new_layout >> 8) & 0xff; | |
1134 | offset = info->new_layout & 0x10000; | |
1135 | if (far > 1 && !offset) | |
1136 | return "Cannot reshape RAID10 to far-mode"; | |
1137 | if (near * far != copies) | |
7a862a02 | 1138 | return "Cannot change number of copies when reshaping RAID10"; |
19ceb16d N |
1139 | } |
1140 | if (info->delta_disks == UnSet) | |
1141 | info->delta_disks = 0; | |
1142 | new_disks = (info->array.raid_disks + | |
1143 | info->delta_disks); | |
1144 | ||
1145 | new_chunk = info->new_chunk * far; | |
1146 | ||
1147 | re->level = 10; | |
19ceb16d N |
1148 | re->before.layout = info->array.layout; |
1149 | re->before.data_disks = info->array.raid_disks; | |
1150 | re->after.layout = info->new_layout; | |
1151 | re->after.data_disks = new_disks; | |
89ecd3cf N |
1152 | /* For RAID10 we don't do backup but do allow reshape, |
1153 | * so set backup_blocks to INVALID_SECTORS rather than | |
1154 | * zero. | |
1155 | * And there is no need to synchronise stripes on both | |
19ceb16d N |
1156 | * 'old' and 'new'. So the important |
1157 | * number is the minimum data_offset difference | |
1158 | * which is the larger of (offset copies * chunk). | |
1159 | */ | |
89ecd3cf N |
1160 | re->backup_blocks = INVALID_SECTORS; |
1161 | re->min_offset_change = max(old_chunk, new_chunk) / 512; | |
ee2429e0 | 1162 | if (new_disks < re->before.data_disks && |
89ecd3cf | 1163 | info->space_after < re->min_offset_change) |
ee2429e0 N |
1164 | /* Reduce component size by one chunk */ |
1165 | re->new_size = (info->component_size - | |
89ecd3cf | 1166 | re->min_offset_change); |
ee2429e0 N |
1167 | else |
1168 | re->new_size = info->component_size; | |
1169 | re->new_size = re->new_size * new_disks / copies; | |
19ceb16d | 1170 | return NULL; |
5da9ab98 | 1171 | |
19ceb16d N |
1172 | default: |
1173 | return "RAID10 can only be changed to RAID0"; | |
1174 | } | |
5da9ab98 N |
1175 | case 0: |
1176 | /* RAID0 can be converted to RAID10, or to RAID456 */ | |
1177 | if (info->new_level == 10) { | |
1178 | if (info->new_layout == UnSet && info->delta_disks == UnSet) { | |
1179 | /* Assume near=2 layout */ | |
1180 | info->new_layout = 0x102; | |
1181 | info->delta_disks = info->array.raid_disks; | |
1182 | } | |
1183 | if (info->new_layout == UnSet) { | |
1184 | int copies = 1 + (info->delta_disks | |
1185 | / info->array.raid_disks); | |
1186 | if (info->array.raid_disks * (copies-1) | |
1187 | != info->delta_disks) | |
7a862a02 | 1188 | return "Impossible number of devices for RAID0->RAID10"; |
5da9ab98 N |
1189 | info->new_layout = 0x100 + copies; |
1190 | } | |
1191 | if (info->delta_disks == UnSet) { | |
1192 | int copies = info->new_layout & 0xff; | |
1193 | if (info->new_layout != 0x100 + copies) | |
7a862a02 | 1194 | return "New layout impossible for RAID0->RAID10";; |
5da9ab98 N |
1195 | info->delta_disks = (copies - 1) * |
1196 | info->array.raid_disks; | |
1197 | } | |
1198 | if (info->new_chunk && | |
1199 | info->new_chunk != info->array.chunk_size) | |
1200 | return "Cannot change chunk-size with RAID0->RAID10"; | |
1201 | /* looks good */ | |
1202 | re->level = 10; | |
5da9ab98 N |
1203 | re->before.data_disks = (info->array.raid_disks + |
1204 | info->delta_disks); | |
031d445c | 1205 | re->after.data_disks = re->before.data_disks; |
5da9ab98 | 1206 | re->before.layout = info->new_layout; |
5da9ab98 N |
1207 | return NULL; |
1208 | } | |
1209 | ||
1210 | /* RAID0 can also covert to RAID0/4/5/6 by first converting to | |
1211 | * a raid4 style layout of the final level. | |
1212 | */ | |
1213 | switch (info->new_level) { | |
5da9ab98 | 1214 | case 4: |
b545e14a N |
1215 | delta_parity = 1; |
1216 | case 0: | |
5da9ab98 N |
1217 | re->level = 4; |
1218 | re->before.layout = 0; | |
1219 | break; | |
1220 | case 5: | |
b545e14a | 1221 | delta_parity = 1; |
5da9ab98 N |
1222 | re->level = 5; |
1223 | re->before.layout = ALGORITHM_PARITY_N; | |
e5ba75ce N |
1224 | if (info->new_layout == UnSet) |
1225 | info->new_layout = map_name(r5layout, "default"); | |
5da9ab98 N |
1226 | break; |
1227 | case 6: | |
b545e14a | 1228 | delta_parity = 2; |
5da9ab98 N |
1229 | re->level = 6; |
1230 | re->before.layout = ALGORITHM_PARITY_N; | |
e5ba75ce N |
1231 | if (info->new_layout == UnSet) |
1232 | info->new_layout = map_name(r6layout, "default"); | |
5da9ab98 N |
1233 | break; |
1234 | default: | |
1235 | return "Impossible level change requested"; | |
1236 | } | |
1237 | re->before.data_disks = info->array.raid_disks; | |
1238 | /* determining 'after' layout happens outside this 'switch' */ | |
1239 | break; | |
1240 | ||
1241 | case 4: | |
1242 | info->array.layout = ALGORITHM_PARITY_N; | |
1243 | case 5: | |
1244 | switch (info->new_level) { | |
f0cce442 | 1245 | case 0: |
b545e14a | 1246 | delta_parity = -1; |
5da9ab98 N |
1247 | case 4: |
1248 | re->level = info->array.level; | |
1249 | re->before.data_disks = info->array.raid_disks - 1; | |
1250 | re->before.layout = info->array.layout; | |
1251 | break; | |
1252 | case 5: | |
1253 | re->level = 5; | |
1254 | re->before.data_disks = info->array.raid_disks - 1; | |
1255 | re->before.layout = info->array.layout; | |
1256 | break; | |
1257 | case 6: | |
b545e14a | 1258 | delta_parity = 1; |
5da9ab98 N |
1259 | re->level = 6; |
1260 | re->before.data_disks = info->array.raid_disks - 1; | |
1261 | switch (info->array.layout) { | |
1262 | case ALGORITHM_LEFT_ASYMMETRIC: | |
1263 | re->before.layout = ALGORITHM_LEFT_ASYMMETRIC_6; | |
1264 | break; | |
1265 | case ALGORITHM_RIGHT_ASYMMETRIC: | |
1266 | re->before.layout = ALGORITHM_RIGHT_ASYMMETRIC_6; | |
1267 | break; | |
1268 | case ALGORITHM_LEFT_SYMMETRIC: | |
1269 | re->before.layout = ALGORITHM_LEFT_SYMMETRIC_6; | |
1270 | break; | |
1271 | case ALGORITHM_RIGHT_SYMMETRIC: | |
1272 | re->before.layout = ALGORITHM_RIGHT_SYMMETRIC_6; | |
1273 | break; | |
1274 | case ALGORITHM_PARITY_0: | |
1275 | re->before.layout = ALGORITHM_PARITY_0_6; | |
1276 | break; | |
1277 | case ALGORITHM_PARITY_N: | |
1278 | re->before.layout = ALGORITHM_PARITY_N_6; | |
1279 | break; | |
1280 | default: | |
1281 | return "Cannot convert an array with this layout"; | |
1282 | } | |
1283 | break; | |
1284 | case 1: | |
1285 | if (info->array.raid_disks != 2) | |
1286 | return "Can only convert a 2-device array to RAID1"; | |
b545e14a N |
1287 | if (info->delta_disks != UnSet && |
1288 | info->delta_disks != 0) | |
7a862a02 | 1289 | return "Cannot set raid_disk when converting RAID5->RAID1"; |
5da9ab98 | 1290 | re->level = 1; |
6a67848a N |
1291 | info->new_chunk = 0; |
1292 | return NULL; | |
5da9ab98 N |
1293 | default: |
1294 | return "Impossible level change requested"; | |
1295 | } | |
1296 | break; | |
1297 | case 6: | |
1298 | switch (info->new_level) { | |
1299 | case 4: | |
1300 | case 5: | |
b545e14a | 1301 | delta_parity = -1; |
5da9ab98 N |
1302 | case 6: |
1303 | re->level = 6; | |
1304 | re->before.data_disks = info->array.raid_disks - 2; | |
1305 | re->before.layout = info->array.layout; | |
1306 | break; | |
1307 | default: | |
1308 | return "Impossible level change requested"; | |
1309 | } | |
1310 | break; | |
1311 | } | |
1312 | ||
1313 | /* If we reached here then it looks like a re-stripe is | |
1314 | * happening. We have determined the intermediate level | |
1315 | * and initial raid_disks/layout and stored these in 're'. | |
1316 | * | |
1317 | * We need to deduce the final layout that can be atomically | |
1318 | * converted to the end state. | |
1319 | */ | |
1320 | switch (info->new_level) { | |
1321 | case 0: | |
1322 | /* We can only get to RAID0 from RAID4 or RAID5 | |
1323 | * with appropriate layout and one extra device | |
1324 | */ | |
1325 | if (re->level != 4 && re->level != 5) | |
1326 | return "Cannot covert to RAID0 from this level"; | |
b545e14a | 1327 | |
5da9ab98 N |
1328 | switch (re->level) { |
1329 | case 4: | |
e339dba2 | 1330 | re->before.layout = 0; |
ca3b6696 N |
1331 | re->after.layout = 0; |
1332 | break; | |
5da9ab98 | 1333 | case 5: |
ca3b6696 N |
1334 | re->after.layout = ALGORITHM_PARITY_N; |
1335 | break; | |
5da9ab98 N |
1336 | } |
1337 | break; | |
1338 | ||
1339 | case 4: | |
1340 | /* We can only get to RAID4 from RAID5 */ | |
1341 | if (re->level != 4 && re->level != 5) | |
1342 | return "Cannot convert to RAID4 from this level"; | |
b545e14a | 1343 | |
5da9ab98 N |
1344 | switch (re->level) { |
1345 | case 4: | |
ca3b6696 N |
1346 | re->after.layout = 0; |
1347 | break; | |
5da9ab98 | 1348 | case 5: |
ca3b6696 N |
1349 | re->after.layout = ALGORITHM_PARITY_N; |
1350 | break; | |
5da9ab98 N |
1351 | } |
1352 | break; | |
1353 | ||
1354 | case 5: | |
0073a6e1 | 1355 | /* We get to RAID5 from RAID5 or RAID6 */ |
5da9ab98 N |
1356 | if (re->level != 5 && re->level != 6) |
1357 | return "Cannot convert to RAID5 from this level"; | |
b545e14a | 1358 | |
5da9ab98 N |
1359 | switch (re->level) { |
1360 | case 5: | |
1361 | if (info->new_layout == UnSet) | |
1362 | re->after.layout = re->before.layout; | |
1363 | else | |
1364 | re->after.layout = info->new_layout; | |
1365 | break; | |
1366 | case 6: | |
4a870364 N |
1367 | if (info->new_layout == UnSet) |
1368 | info->new_layout = re->before.layout; | |
1369 | ||
5da9ab98 N |
1370 | /* after.layout needs to be raid6 version of new_layout */ |
1371 | if (info->new_layout == ALGORITHM_PARITY_N) | |
1372 | re->after.layout = ALGORITHM_PARITY_N; | |
1373 | else { | |
1374 | char layout[40]; | |
1375 | char *ls = map_num(r5layout, info->new_layout); | |
1376 | int l; | |
0073a6e1 N |
1377 | if (ls) { |
1378 | /* Current RAID6 layout has a RAID5 | |
1379 | * equivalent - good | |
1380 | */ | |
1381 | strcat(strcpy(layout, ls), "-6"); | |
1382 | l = map_name(r6layout, layout); | |
1383 | if (l == UnSet) | |
7a862a02 | 1384 | return "Cannot find RAID6 layout to convert to"; |
0073a6e1 N |
1385 | } else { |
1386 | /* Current RAID6 has no equivalent. | |
1387 | * If it is already a '-6' layout we | |
1388 | * can leave it unchanged, else we must | |
1389 | * fail | |
1390 | */ | |
1391 | ls = map_num(r6layout, info->new_layout); | |
1392 | if (!ls || | |
1393 | strcmp(ls+strlen(ls)-2, "-6") != 0) | |
1394 | return "Please specify new layout"; | |
1395 | l = info->new_layout; | |
1396 | } | |
5da9ab98 N |
1397 | re->after.layout = l; |
1398 | } | |
1399 | } | |
1400 | break; | |
1401 | ||
1402 | case 6: | |
1403 | /* We must already be at level 6 */ | |
1404 | if (re->level != 6) | |
1405 | return "Impossible level change"; | |
5da9ab98 | 1406 | if (info->new_layout == UnSet) |
4a870364 | 1407 | re->after.layout = info->array.layout; |
5da9ab98 N |
1408 | else |
1409 | re->after.layout = info->new_layout; | |
1410 | break; | |
1411 | default: | |
1412 | return "Impossible level change requested"; | |
1413 | } | |
b545e14a N |
1414 | if (info->delta_disks == UnSet) |
1415 | info->delta_disks = delta_parity; | |
1416 | ||
1417 | re->after.data_disks = (re->before.data_disks | |
1418 | + info->delta_disks | |
1419 | - delta_parity); | |
5da9ab98 | 1420 | switch (re->level) { |
ca3b6696 N |
1421 | case 6: re->parity = 2; |
1422 | break; | |
5da9ab98 | 1423 | case 4: |
ca3b6696 N |
1424 | case 5: re->parity = 1; |
1425 | break; | |
1426 | default: re->parity = 0; | |
1427 | break; | |
5da9ab98 N |
1428 | } |
1429 | /* So we have a restripe operation, we need to calculate the number | |
1430 | * of blocks per reshape operation. | |
1431 | */ | |
ddbf2ebb | 1432 | re->new_size = info->component_size * re->before.data_disks; |
5da9ab98 N |
1433 | if (info->new_chunk == 0) |
1434 | info->new_chunk = info->array.chunk_size; | |
1435 | if (re->after.data_disks == re->before.data_disks && | |
1436 | re->after.layout == re->before.layout && | |
1437 | info->new_chunk == info->array.chunk_size) { | |
fdcad551 N |
1438 | /* Nothing to change, can change level immediately. */ |
1439 | re->level = info->new_level; | |
b4f8e38b | 1440 | re->backup_blocks = 0; |
5da9ab98 N |
1441 | return NULL; |
1442 | } | |
1443 | if (re->after.data_disks == 1 && re->before.data_disks == 1) { | |
446d2a5a | 1444 | /* chunk and layout changes make no difference */ |
fdcad551 | 1445 | re->level = info->new_level; |
b4f8e38b | 1446 | re->backup_blocks = 0; |
5da9ab98 N |
1447 | return NULL; |
1448 | } | |
1449 | ||
1450 | if (re->after.data_disks == re->before.data_disks && | |
1451 | get_linux_version() < 2006032) | |
1452 | return "in-place reshape is not safe before 2.6.32 - sorry."; | |
1453 | ||
1454 | if (re->after.data_disks < re->before.data_disks && | |
1455 | get_linux_version() < 2006030) | |
508ede86 | 1456 | return "reshape to fewer devices is not supported before 2.6.30 - sorry."; |
5da9ab98 | 1457 | |
b4f8e38b | 1458 | re->backup_blocks = compute_backup_blocks( |
5da9ab98 N |
1459 | info->new_chunk, info->array.chunk_size, |
1460 | re->after.data_disks, | |
1461 | re->before.data_disks); | |
63c12c89 | 1462 | re->min_offset_change = re->backup_blocks / re->before.data_disks; |
5da9ab98 N |
1463 | |
1464 | re->new_size = info->component_size * re->after.data_disks; | |
1465 | return NULL; | |
1466 | } | |
1467 | ||
54397ed9 AK |
1468 | static int set_array_size(struct supertype *st, struct mdinfo *sra, |
1469 | char *text_version) | |
1470 | { | |
1471 | struct mdinfo *info; | |
1472 | char *subarray; | |
1473 | int ret_val = -1; | |
1474 | ||
1475 | if ((st == NULL) || (sra == NULL)) | |
1476 | return ret_val; | |
1477 | ||
1478 | if (text_version == NULL) | |
1479 | text_version = sra->text_version; | |
1480 | subarray = strchr(text_version+1, '/')+1; | |
1481 | info = st->ss->container_content(st, subarray); | |
1482 | if (info) { | |
1483 | unsigned long long current_size = 0; | |
1484 | unsigned long long new_size = | |
1485 | info->custom_array_size/2; | |
1486 | ||
1487 | if (sysfs_get_ll(sra, NULL, "array_size", ¤t_size) == 0 && | |
1488 | new_size > current_size) { | |
1489 | if (sysfs_set_num(sra, NULL, "array_size", new_size) | |
1490 | < 0) | |
1491 | dprintf("Error: Cannot set array size"); | |
1492 | else { | |
1493 | ret_val = 0; | |
1494 | dprintf("Array size changed"); | |
1495 | } | |
1ade5cc1 N |
1496 | dprintf_cont(" from %llu to %llu.\n", |
1497 | current_size, new_size); | |
54397ed9 AK |
1498 | } |
1499 | sysfs_free(info); | |
1500 | } else | |
1501 | dprintf("Error: set_array_size(): info pointer in NULL\n"); | |
1502 | ||
1503 | return ret_val; | |
1504 | } | |
1505 | ||
5da9ab98 N |
1506 | static int reshape_array(char *container, int fd, char *devname, |
1507 | struct supertype *st, struct mdinfo *info, | |
e2e53a2d | 1508 | int force, struct mddev_dev *devlist, |
19ceb16d | 1509 | unsigned long long data_offset, |
ba728be7 | 1510 | char *backup_file, int verbose, int forked, |
b76b30e0 | 1511 | int restart, int freeze_reshape); |
493f5dd6 | 1512 | static int reshape_container(char *container, char *devname, |
9ad6f6e6 | 1513 | int mdfd, |
24daa16f | 1514 | struct supertype *st, |
5da9ab98 N |
1515 | struct mdinfo *info, |
1516 | int force, | |
b0140ae8 N |
1517 | char *backup_file, int verbose, |
1518 | int forked, int restart, int freeze_reshape); | |
1c009fc2 | 1519 | |
32754b7d | 1520 | int Grow_reshape(char *devname, int fd, |
e2e53a2d | 1521 | struct mddev_dev *devlist, |
40c9a66a | 1522 | unsigned long long data_offset, |
32754b7d | 1523 | struct context *c, struct shape *s) |
e86c9dd6 NB |
1524 | { |
1525 | /* Make some changes in the shape of an array. | |
1526 | * The kernel must support the change. | |
7236ee7a N |
1527 | * |
1528 | * There are three different changes. Each can trigger | |
1529 | * a resync or recovery so we freeze that until we have | |
1530 | * requested everything (if kernel supports freezing - 2.6.30). | |
1531 | * The steps are: | |
1532 | * - change size (i.e. component_size) | |
1533 | * - change level | |
1534 | * - change layout/chunksize/ndisks | |
1535 | * | |
1536 | * The last can require a reshape. It is different on different | |
1537 | * levels so we need to check the level before actioning it. | |
1538 | * Some times the level change needs to be requested after the | |
1539 | * reshape (e.g. raid6->raid5, raid5->raid0) | |
1540 | * | |
e86c9dd6 | 1541 | */ |
5da9ab98 | 1542 | struct mdu_array_info_s array; |
7236ee7a | 1543 | int rv = 0; |
e86c9dd6 | 1544 | struct supertype *st; |
4725bc31 | 1545 | char *subarray = NULL; |
e86c9dd6 | 1546 | |
7236ee7a | 1547 | int frozen; |
7236ee7a | 1548 | int changed = 0; |
7bc71196 DW |
1549 | char *container = NULL; |
1550 | int cfd = -1; | |
e86c9dd6 | 1551 | |
e2e53a2d N |
1552 | struct mddev_dev *dv; |
1553 | int added_disks; | |
1554 | ||
5da9ab98 | 1555 | struct mdinfo info; |
7e0f6979 | 1556 | struct mdinfo *sra; |
e86c9dd6 NB |
1557 | |
1558 | if (ioctl(fd, GET_ARRAY_INFO, &array) < 0) { | |
ed503f89 | 1559 | pr_err("%s is not an active md array - aborting\n", |
e86c9dd6 NB |
1560 | devname); |
1561 | return 1; | |
1562 | } | |
4abcbc21 N |
1563 | if (data_offset != INVALID_SECTORS && array.level != 10 |
1564 | && (array.level < 4 || array.level > 6)) { | |
19ceb16d N |
1565 | pr_err("--grow --data-offset not yet supported\n"); |
1566 | return 1; | |
1567 | } | |
24d40069 | 1568 | |
32754b7d N |
1569 | if (s->size > 0 && |
1570 | (s->chunk || s->level!= UnSet || s->layout_str || s->raiddisks)) { | |
7a862a02 N |
1571 | pr_err("cannot change component size at the same time as other changes.\n" |
1572 | " Change size first, then check data is intact before making other changes.\n"); | |
9ce510be N |
1573 | return 1; |
1574 | } | |
1575 | ||
32754b7d | 1576 | if (s->raiddisks && s->raiddisks < array.raid_disks && array.level > 1 && |
24d40069 N |
1577 | get_linux_version() < 2006032 && |
1578 | !check_env("MDADM_FORCE_FEWER")) { | |
e7b84f9d | 1579 | pr_err("reducing the number of devices is not safe before Linux 2.6.32\n" |
24d40069 N |
1580 | " Please use a newer kernel\n"); |
1581 | return 1; | |
1582 | } | |
7bc71196 DW |
1583 | |
1584 | st = super_by_fd(fd, &subarray); | |
1585 | if (!st) { | |
e7b84f9d | 1586 | pr_err("Unable to determine metadata format for %s\n", devname); |
7bc71196 DW |
1587 | return 1; |
1588 | } | |
32754b7d | 1589 | if (s->raiddisks > st->max_devs) { |
7a862a02 | 1590 | pr_err("Cannot increase raid-disks on this array beyond %d\n", st->max_devs); |
acab7bb1 N |
1591 | return 1; |
1592 | } | |
f7cf9699 XN |
1593 | if (s->level == 0 && |
1594 | (array.state & (1<<MD_SB_BITMAP_PRESENT)) && | |
1595 | !(array.state & (1<<MD_SB_CLUSTERED))) { | |
1596 | array.state &= ~(1<<MD_SB_BITMAP_PRESENT); | |
1597 | if (ioctl(fd, SET_ARRAY_INFO, &array)!= 0) { | |
1598 | pr_err("failed to remove internal bitmap.\n"); | |
1599 | return 1; | |
1600 | } | |
1601 | } | |
7bc71196 DW |
1602 | |
1603 | /* in the external case we need to check that the requested reshape is | |
1604 | * supported, and perform an initial check that the container holds the | |
1605 | * pre-requisite spare devices (mdmon owns final validation) | |
1606 | */ | |
1607 | if (st->ss->external) { | |
7f2ba464 | 1608 | int rv; |
7bc71196 DW |
1609 | |
1610 | if (subarray) { | |
4dd2df09 N |
1611 | container = st->container_devnm; |
1612 | cfd = open_dev_excl(st->container_devnm); | |
7bc71196 | 1613 | } else { |
4dd2df09 | 1614 | container = st->devnm; |
7bc71196 | 1615 | close(fd); |
4dd2df09 | 1616 | cfd = open_dev_excl(st->devnm); |
7bc71196 DW |
1617 | fd = cfd; |
1618 | } | |
1619 | if (cfd < 0) { | |
e7b84f9d | 1620 | pr_err("Unable to open container for %s\n", |
7bc71196 | 1621 | devname); |
7f2ba464 | 1622 | free(subarray); |
7bc71196 DW |
1623 | return 1; |
1624 | } | |
1625 | ||
eb744788 AK |
1626 | rv = st->ss->load_container(st, cfd, NULL); |
1627 | ||
7f2ba464 | 1628 | if (rv) { |
e7b84f9d | 1629 | pr_err("Cannot read superblock for %s\n", |
7bc71196 | 1630 | devname); |
7f2ba464 | 1631 | free(subarray); |
7bc71196 DW |
1632 | return 1; |
1633 | } | |
1634 | ||
81219e70 LM |
1635 | /* check if operation is supported for metadata handler */ |
1636 | if (st->ss->container_content) { | |
1637 | struct mdinfo *cc = NULL; | |
1638 | struct mdinfo *content = NULL; | |
1639 | ||
1640 | cc = st->ss->container_content(st, subarray); | |
1641 | for (content = cc; content ; content = content->next) { | |
446894ea | 1642 | int allow_reshape = 1; |
81219e70 LM |
1643 | |
1644 | /* check if reshape is allowed based on metadata | |
1645 | * indications stored in content.array.status | |
1646 | */ | |
446894ea N |
1647 | if (content->array.state & (1<<MD_SB_BLOCK_VOLUME)) |
1648 | allow_reshape = 0; | |
1649 | if (content->array.state | |
1650 | & (1<<MD_SB_BLOCK_CONTAINER_RESHAPE)) | |
1651 | allow_reshape = 0; | |
81219e70 | 1652 | if (!allow_reshape) { |
7a862a02 | 1653 | pr_err("cannot reshape arrays in container with unsupported metadata: %s(%s)\n", |
4dd2df09 | 1654 | devname, container); |
81219e70 LM |
1655 | sysfs_free(cc); |
1656 | free(subarray); | |
1657 | return 1; | |
1658 | } | |
1659 | } | |
1660 | sysfs_free(cc); | |
1661 | } | |
4dd2df09 | 1662 | if (mdmon_running(container)) |
7bc71196 | 1663 | st->update_tail = &st->updates; |
e2e53a2d | 1664 | } |
691a36b7 | 1665 | |
e2e53a2d N |
1666 | added_disks = 0; |
1667 | for (dv = devlist; dv; dv = dv->next) | |
1668 | added_disks++; | |
32754b7d N |
1669 | if (s->raiddisks > array.raid_disks && |
1670 | array.spare_disks +added_disks < (s->raiddisks - array.raid_disks) && | |
1671 | !c->force) { | |
7a862a02 | 1672 | pr_err("Need %d spare%s to avoid degraded array, and only have %d.\n" |
e7b84f9d | 1673 | " Use --force to over-ride this check.\n", |
32754b7d N |
1674 | s->raiddisks - array.raid_disks, |
1675 | s->raiddisks - array.raid_disks == 1 ? "" : "s", | |
e7b84f9d | 1676 | array.spare_disks + added_disks); |
691a36b7 | 1677 | return 1; |
7bc71196 DW |
1678 | } |
1679 | ||
4dd2df09 | 1680 | sra = sysfs_read(fd, NULL, GET_LEVEL | GET_DISKS | GET_DEVS |
3fa436ac | 1681 | | GET_STATE | GET_VERSION); |
24daa16f | 1682 | if (sra) { |
7f2ba464 | 1683 | if (st->ss->external && subarray == NULL) { |
7bc71196 DW |
1684 | array.level = LEVEL_CONTAINER; |
1685 | sra->array.level = LEVEL_CONTAINER; | |
1686 | } | |
7bc71196 | 1687 | } else { |
e7b84f9d | 1688 | pr_err("failed to read sysfs parameters for %s\n", |
b526e52d DW |
1689 | devname); |
1690 | return 1; | |
1691 | } | |
7f2ba464 DW |
1692 | frozen = freeze(st); |
1693 | if (frozen < -1) { | |
1694 | /* freeze() already spewed the reason */ | |
8e61e0d7 | 1695 | sysfs_free(sra); |
7f2ba464 DW |
1696 | return 1; |
1697 | } else if (frozen < 0) { | |
7a862a02 | 1698 | pr_err("%s is performing resync/recovery and cannot be reshaped\n", devname); |
8e61e0d7 | 1699 | sysfs_free(sra); |
7236ee7a N |
1700 | return 1; |
1701 | } | |
1702 | ||
1703 | /* ========= set size =============== */ | |
887a7a9e | 1704 | if (s->size > 0 && (s->size == MAX_SIZE || s->size != (unsigned)array.size)) { |
d04f65f4 N |
1705 | unsigned long long orig_size = get_component_size(fd)/2; |
1706 | unsigned long long min_csize; | |
d1537ed1 | 1707 | struct mdinfo *mdi; |
44f6f181 | 1708 | int raid0_takeover = 0; |
7bc71196 | 1709 | |
85f10287 | 1710 | if (orig_size == 0) |
d04f65f4 | 1711 | orig_size = (unsigned) array.size; |
85f10287 | 1712 | |
3920235e N |
1713 | if (orig_size == 0) { |
1714 | pr_err("Cannot set device size in this type of array.\n"); | |
1715 | rv = 1; | |
1716 | goto release; | |
1717 | } | |
1718 | ||
32754b7d N |
1719 | if (reshape_super(st, s->size, UnSet, UnSet, 0, 0, UnSet, NULL, |
1720 | devname, APPLY_METADATA_CHANGES, c->verbose > 0)) { | |
7bc71196 DW |
1721 | rv = 1; |
1722 | goto release; | |
1723 | } | |
1724 | sync_metadata(st); | |
7e7e9a4d AK |
1725 | if (st->ss->external) { |
1726 | /* metadata can have size limitation | |
1727 | * update size value according to metadata information | |
1728 | */ | |
1729 | struct mdinfo *sizeinfo = | |
1730 | st->ss->container_content(st, subarray); | |
1731 | if (sizeinfo) { | |
1732 | unsigned long long new_size = | |
1733 | sizeinfo->custom_array_size/2; | |
1734 | int data_disks = get_data_disks( | |
1735 | sizeinfo->array.level, | |
1736 | sizeinfo->array.layout, | |
1737 | sizeinfo->array.raid_disks); | |
1738 | new_size /= data_disks; | |
7a862a02 | 1739 | dprintf("Metadata size correction from %llu to %llu (%llu)\n", orig_size, new_size, |
7e7e9a4d | 1740 | new_size * data_disks); |
32754b7d | 1741 | s->size = new_size; |
7e7e9a4d AK |
1742 | sysfs_free(sizeinfo); |
1743 | } | |
1744 | } | |
d1537ed1 N |
1745 | |
1746 | /* Update the size of each member device in case | |
1747 | * they have been resized. This will never reduce | |
1748 | * below the current used-size. The "size" attribute | |
20a46756 | 1749 | * understands '0' to mean 'max'. |
d1537ed1 | 1750 | */ |
20a46756 | 1751 | min_csize = 0; |
65a9798b | 1752 | rv = 0; |
20a46756 | 1753 | for (mdi = sra->devs; mdi; mdi = mdi->next) { |
d04f65f4 | 1754 | if (sysfs_set_num(sra, mdi, "size", |
32754b7d | 1755 | s->size == MAX_SIZE ? 0 : s->size) < 0) { |
b0a658ff N |
1756 | /* Probably kernel refusing to let us |
1757 | * reduce the size - not an error. | |
1758 | */ | |
20a46756 | 1759 | break; |
65a9798b | 1760 | } |
20a46756 N |
1761 | if (array.not_persistent == 0 && |
1762 | array.major_version == 0 && | |
1763 | get_linux_version() < 3001000) { | |
1764 | /* Dangerous to allow size to exceed 2TB */ | |
1765 | unsigned long long csize; | |
1766 | if (sysfs_get_ll(sra, mdi, "size", &csize) == 0) { | |
1767 | if (csize >= 2ULL*1024*1024*1024) | |
1768 | csize = 2ULL*1024*1024*1024; | |
1769 | if ((min_csize == 0 || (min_csize | |
d04f65f4 | 1770 | > csize))) |
20a46756 N |
1771 | min_csize = csize; |
1772 | } | |
1773 | } | |
1774 | } | |
65a9798b | 1775 | if (rv) { |
7a862a02 | 1776 | pr_err("Cannot set size on array members.\n"); |
65a9798b AK |
1777 | goto size_change_error; |
1778 | } | |
32754b7d | 1779 | if (min_csize && s->size > min_csize) { |
7a862a02 | 1780 | pr_err("Cannot safely make this array use more than 2TB per device on this kernel.\n"); |
20a46756 | 1781 | rv = 1; |
65a9798b | 1782 | goto size_change_error; |
20a46756 | 1783 | } |
32754b7d | 1784 | if (min_csize && s->size == MAX_SIZE) { |
20a46756 N |
1785 | /* Don't let the kernel choose a size - it will get |
1786 | * it wrong | |
1787 | */ | |
7a862a02 | 1788 | pr_err("Limited v0.90 array to 2TB per device\n"); |
32754b7d | 1789 | s->size = min_csize; |
20a46756 | 1790 | } |
44f6f181 AK |
1791 | if (st->ss->external) { |
1792 | if (sra->array.level == 0) { | |
1793 | rv = sysfs_set_str(sra, NULL, "level", | |
1794 | "raid5"); | |
1795 | if (!rv) { | |
1796 | raid0_takeover = 1; | |
2a6493cf N |
1797 | /* get array parameters after takeover |
1798 | * to change one parameter at time only | |
44f6f181 AK |
1799 | */ |
1800 | rv = ioctl(fd, GET_ARRAY_INFO, &array); | |
1801 | } | |
1802 | } | |
1803 | /* make sure mdmon is | |
1804 | * aware of the new level */ | |
4dd2df09 N |
1805 | if (!mdmon_running(st->container_devnm)) |
1806 | start_mdmon(st->container_devnm); | |
44f6f181 | 1807 | ping_monitor(container); |
4dd2df09 | 1808 | if (mdmon_running(st->container_devnm) && |
44f6f181 AK |
1809 | st->update_tail == NULL) |
1810 | st->update_tail = &st->updates; | |
1811 | } | |
1812 | ||
0a8b92a6 N |
1813 | if (s->size == MAX_SIZE) |
1814 | s->size = 0; | |
1815 | array.size = s->size; | |
0448027b | 1816 | if (s->size & ~INT32_MAX) { |
7236ee7a N |
1817 | /* got truncated to 32bit, write to |
1818 | * component_size instead | |
1819 | */ | |
1820 | if (sra) | |
1821 | rv = sysfs_set_num(sra, NULL, | |
32754b7d | 1822 | "component_size", s->size); |
7236ee7a N |
1823 | else |
1824 | rv = -1; | |
54397ed9 | 1825 | } else { |
7236ee7a | 1826 | rv = ioctl(fd, SET_ARRAY_INFO, &array); |
44f6f181 | 1827 | |
54397ed9 AK |
1828 | /* manage array size when it is managed externally |
1829 | */ | |
1830 | if ((rv == 0) && st->ss->external) | |
1831 | rv = set_array_size(st, sra, sra->text_version); | |
1832 | } | |
1833 | ||
44f6f181 AK |
1834 | if (raid0_takeover) { |
1835 | /* do not recync non-existing parity, | |
1836 | * we will drop it anyway | |
1837 | */ | |
b51702b8 | 1838 | sysfs_set_str(sra, NULL, "sync_action", "frozen"); |
44f6f181 AK |
1839 | /* go back to raid0, drop parity disk |
1840 | */ | |
1841 | sysfs_set_str(sra, NULL, "level", "raid0"); | |
1842 | ioctl(fd, GET_ARRAY_INFO, &array); | |
1843 | } | |
1844 | ||
65a9798b | 1845 | size_change_error: |
7236ee7a | 1846 | if (rv != 0) { |
39bbb392 | 1847 | int err = errno; |
7bc71196 DW |
1848 | |
1849 | /* restore metadata */ | |
1850 | if (reshape_super(st, orig_size, UnSet, UnSet, 0, 0, | |
016e00f5 AK |
1851 | UnSet, NULL, devname, |
1852 | ROLLBACK_METADATA_CHANGES, | |
32754b7d | 1853 | c->verbose) == 0) |
7bc71196 | 1854 | sync_metadata(st); |
e7b84f9d | 1855 | pr_err("Cannot set device size for %s: %s\n", |
39bbb392 | 1856 | devname, strerror(err)); |
24daa16f | 1857 | if (err == EBUSY && |
39bbb392 | 1858 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) |
e7b84f9d | 1859 | cont_err("Bitmap must be removed before size can be changed\n"); |
7236ee7a N |
1860 | rv = 1; |
1861 | goto release; | |
1862 | } | |
32754b7d | 1863 | if (s->assume_clean) { |
86952387 | 1864 | /* This will fail on kernels older than 3.0 unless |
ce52f92f N |
1865 | * a backport has been arranged. |
1866 | */ | |
1867 | if (sra == NULL || | |
1868 | sysfs_set_str(sra, NULL, "resync_start", "none") < 0) | |
86952387 | 1869 | pr_err("--assume-clean not supported with --grow on this kernel\n"); |
ce52f92f | 1870 | } |
7236ee7a | 1871 | ioctl(fd, GET_ARRAY_INFO, &array); |
32754b7d N |
1872 | s->size = get_component_size(fd)/2; |
1873 | if (s->size == 0) | |
1874 | s->size = array.size; | |
1875 | if (c->verbose >= 0) { | |
1876 | if (s->size == orig_size) | |
7a862a02 | 1877 | pr_err("component size of %s unchanged at %lluK\n", |
32754b7d | 1878 | devname, s->size); |
85f10287 | 1879 | else |
7a862a02 | 1880 | pr_err("component size of %s has been set to %lluK\n", |
32754b7d | 1881 | devname, s->size); |
85f10287 | 1882 | } |
7236ee7a | 1883 | changed = 1; |
7bc71196 | 1884 | } else if (array.level != LEVEL_CONTAINER) { |
32754b7d N |
1885 | s->size = get_component_size(fd)/2; |
1886 | if (s->size == 0) | |
1887 | s->size = array.size; | |
7236ee7a N |
1888 | } |
1889 | ||
d515d27f | 1890 | /* See if there is anything else to do */ |
32754b7d N |
1891 | if ((s->level == UnSet || s->level == array.level) && |
1892 | (s->layout_str == NULL) && | |
1893 | (s->chunk == 0 || s->chunk == array.chunk_size) && | |
8876bf0b | 1894 | data_offset == INVALID_SECTORS && |
32754b7d | 1895 | (s->raiddisks == 0 || s->raiddisks == array.raid_disks)) { |
d515d27f | 1896 | /* Nothing more to do */ |
32754b7d | 1897 | if (!changed && c->verbose >= 0) |
e7b84f9d | 1898 | pr_err("%s: no change requested\n", |
d515d27f N |
1899 | devname); |
1900 | goto release; | |
1901 | } | |
1902 | ||
dfe77a9e | 1903 | /* ========= check for Raid10/Raid1 -> Raid0 conversion =============== |
5da9ab98 | 1904 | * current implementation assumes that following conditions must be met: |
dfe77a9e | 1905 | * - RAID10: |
24daa16f N |
1906 | * - far_copies == 1 |
1907 | * - near_copies == 2 | |
62a48395 | 1908 | */ |
32754b7d | 1909 | if ((s->level == 0 && array.level == 10 && sra && |
24daa16f | 1910 | array.layout == ((1 << 8) + 2) && !(array.raid_disks & 1)) || |
32754b7d | 1911 | (s->level == 0 && array.level == 1 && sra)) { |
62a48395 | 1912 | int err; |
dfe77a9e | 1913 | err = remove_disks_for_takeover(st, sra, array.layout); |
62a48395 | 1914 | if (err) { |
1ade5cc1 | 1915 | dprintf("Array cannot be reshaped\n"); |
62a48395 AK |
1916 | if (cfd > -1) |
1917 | close(cfd); | |
5da9ab98 N |
1918 | rv = 1; |
1919 | goto release; | |
7236ee7a | 1920 | } |
fde139b9 N |
1921 | /* Make sure mdmon has seen the device removal |
1922 | * and updated metadata before we continue with | |
1923 | * level change | |
1924 | */ | |
1925 | if (container) | |
1926 | ping_monitor(container); | |
7236ee7a N |
1927 | } |
1928 | ||
8ff6d094 | 1929 | memset(&info, 0, sizeof(info)); |
5da9ab98 | 1930 | info.array = array; |
4dd2df09 | 1931 | sysfs_init(&info, fd, NULL); |
3fa436ac | 1932 | strcpy(info.text_version, sra->text_version); |
32754b7d N |
1933 | info.component_size = s->size*2; |
1934 | info.new_level = s->level; | |
1935 | info.new_chunk = s->chunk * 1024; | |
eff4954d N |
1936 | if (info.array.level == LEVEL_CONTAINER) { |
1937 | info.delta_disks = UnSet; | |
32754b7d N |
1938 | info.array.raid_disks = s->raiddisks; |
1939 | } else if (s->raiddisks) | |
1940 | info.delta_disks = s->raiddisks - info.array.raid_disks; | |
5da9ab98 N |
1941 | else |
1942 | info.delta_disks = UnSet; | |
32754b7d | 1943 | if (s->layout_str == NULL) { |
5da9ab98 N |
1944 | info.new_layout = UnSet; |
1945 | if (info.array.level == 6 && | |
1946 | (info.new_level == 6 || info.new_level == UnSet) && | |
1947 | info.array.layout >= 16) { | |
7a862a02 N |
1948 | pr_err("%s has a non-standard layout. If you wish to preserve this\n", devname); |
1949 | cont_err("during the reshape, please specify --layout=preserve\n"); | |
1950 | cont_err("If you want to change it, specify a layout or use --layout=normalise\n"); | |
7236ee7a N |
1951 | rv = 1; |
1952 | goto release; | |
1953 | } | |
32754b7d N |
1954 | } else if (strcmp(s->layout_str, "normalise") == 0 || |
1955 | strcmp(s->layout_str, "normalize") == 0) { | |
5da9ab98 N |
1956 | /* If we have a -6 RAID6 layout, remove the '-6'. */ |
1957 | info.new_layout = UnSet; | |
1958 | if (info.array.level == 6 && info.new_level == UnSet) { | |
1959 | char l[40], *h; | |
1960 | strcpy(l, map_num(r6layout, info.array.layout)); | |
1961 | h = strrchr(l, '-'); | |
1962 | if (h && strcmp(h, "-6") == 0) { | |
1963 | *h = 0; | |
1964 | info.new_layout = map_name(r6layout, l); | |
7236ee7a | 1965 | } |
385167f3 | 1966 | } else { |
7a862a02 | 1967 | pr_err("%s is only meaningful when reshaping a RAID6 array.\n", s->layout_str); |
385167f3 N |
1968 | rv = 1; |
1969 | goto release; | |
7236ee7a | 1970 | } |
32754b7d | 1971 | } else if (strcmp(s->layout_str, "preserve") == 0) { |
385167f3 N |
1972 | /* This means that a non-standard RAID6 layout |
1973 | * is OK. | |
1974 | * In particular: | |
1975 | * - When reshape a RAID6 (e.g. adding a device) | |
1976 | * which is in a non-standard layout, it is OK | |
1977 | * to preserve that layout. | |
1978 | * - When converting a RAID5 to RAID6, leave it in | |
1979 | * the XXX-6 layout, don't re-layout. | |
1980 | */ | |
1981 | if (info.array.level == 6 && info.new_level == UnSet) | |
1982 | info.new_layout = info.array.layout; | |
1983 | else if (info.array.level == 5 && info.new_level == 6) { | |
1984 | char l[40]; | |
1985 | strcpy(l, map_num(r5layout, info.array.layout)); | |
1986 | strcat(l, "-6"); | |
1987 | info.new_layout = map_name(r6layout, l); | |
1988 | } else { | |
7a862a02 | 1989 | pr_err("%s in only meaningful when reshaping to RAID6\n", s->layout_str); |
385167f3 N |
1990 | rv = 1; |
1991 | goto release; | |
1992 | } | |
5da9ab98 N |
1993 | } else { |
1994 | int l = info.new_level; | |
1995 | if (l == UnSet) | |
1996 | l = info.array.level; | |
1997 | switch (l) { | |
1998 | case 5: | |
32754b7d | 1999 | info.new_layout = map_name(r5layout, s->layout_str); |
5da9ab98 N |
2000 | break; |
2001 | case 6: | |
32754b7d | 2002 | info.new_layout = map_name(r6layout, s->layout_str); |
5da9ab98 N |
2003 | break; |
2004 | case 10: | |
32754b7d | 2005 | info.new_layout = parse_layout_10(s->layout_str); |
5da9ab98 N |
2006 | break; |
2007 | case LEVEL_FAULTY: | |
32754b7d | 2008 | info.new_layout = parse_layout_faulty(s->layout_str); |
5da9ab98 N |
2009 | break; |
2010 | default: | |
7a862a02 | 2011 | pr_err("layout not meaningful with this level\n"); |
7bc71196 DW |
2012 | rv = 1; |
2013 | goto release; | |
2014 | } | |
5da9ab98 | 2015 | if (info.new_layout == UnSet) { |
7a862a02 | 2016 | pr_err("layout %s not understood for this level\n", |
32754b7d | 2017 | s->layout_str); |
5da9ab98 N |
2018 | rv = 1; |
2019 | goto release; | |
7bc71196 | 2020 | } |
7236ee7a N |
2021 | } |
2022 | ||
907ea753 | 2023 | if (array.level == LEVEL_FAULTY) { |
32754b7d | 2024 | if (s->level != UnSet && s->level != array.level) { |
e7b84f9d | 2025 | pr_err("cannot change level of Faulty device\n"); |
907ea753 N |
2026 | rv =1 ; |
2027 | } | |
32754b7d | 2028 | if (s->chunk) { |
e7b84f9d | 2029 | pr_err("cannot set chunksize of Faulty device\n"); |
907ea753 N |
2030 | rv =1 ; |
2031 | } | |
32754b7d | 2032 | if (s->raiddisks && s->raiddisks != 1) { |
e7b84f9d | 2033 | pr_err("cannot set raid_disks of Faulty device\n"); |
907ea753 N |
2034 | rv =1 ; |
2035 | } | |
32754b7d | 2036 | if (s->layout_str) { |
907ea753 N |
2037 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0) { |
2038 | dprintf("Cannot get array information.\n"); | |
2039 | goto release; | |
2040 | } | |
2041 | array.layout = info.new_layout; | |
2042 | if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) { | |
e7b84f9d | 2043 | pr_err("failed to set new layout\n"); |
907ea753 | 2044 | rv = 1; |
32754b7d | 2045 | } else if (c->verbose >= 0) |
907ea753 N |
2046 | printf("layout for %s set to %d\n", |
2047 | devname, array.layout); | |
2048 | } | |
2049 | } else if (array.level == LEVEL_CONTAINER) { | |
5da9ab98 N |
2050 | /* This change is to be applied to every array in the |
2051 | * container. This is only needed when the metadata imposes | |
2052 | * restraints of the various arrays in the container. | |
2053 | * Currently we only know that IMSM requires all arrays | |
2054 | * to have the same number of devices so changing the | |
2055 | * number of devices (On-Line Capacity Expansion) must be | |
2056 | * performed at the level of the container | |
2057 | */ | |
9ad6f6e6 | 2058 | rv = reshape_container(container, devname, -1, st, &info, |
b0140ae8 | 2059 | c->force, c->backup_file, c->verbose, 0, 0, 0); |
9202b8eb | 2060 | frozen = 0; |
5da9ab98 | 2061 | } else { |
08f9e34b AK |
2062 | /* get spare devices from external metadata |
2063 | */ | |
2064 | if (st->ss->external) { | |
2065 | struct mdinfo *info2; | |
2066 | ||
2067 | info2 = st->ss->container_content(st, subarray); | |
2068 | if (info2) { | |
2069 | info.array.spare_disks = | |
2070 | info2->array.spare_disks; | |
2071 | sysfs_free(info2); | |
2072 | } | |
2073 | } | |
2074 | ||
5da9ab98 N |
2075 | /* Impose these changes on a single array. First |
2076 | * check that the metadata is OK with the change. */ | |
7bc71196 | 2077 | |
7ec0996c | 2078 | if (reshape_super(st, 0, info.new_level, |
5da9ab98 | 2079 | info.new_layout, info.new_chunk, |
41784c88 | 2080 | info.array.raid_disks, info.delta_disks, |
32754b7d N |
2081 | c->backup_file, devname, APPLY_METADATA_CHANGES, |
2082 | c->verbose)) { | |
7bc71196 DW |
2083 | rv = 1; |
2084 | goto release; | |
2085 | } | |
5da9ab98 | 2086 | sync_metadata(st); |
32754b7d | 2087 | rv = reshape_array(container, fd, devname, st, &info, c->force, |
19ceb16d N |
2088 | devlist, data_offset, c->backup_file, c->verbose, |
2089 | 0, 0, 0); | |
9202b8eb | 2090 | frozen = 0; |
5da9ab98 N |
2091 | } |
2092 | release: | |
8e61e0d7 | 2093 | sysfs_free(sra); |
9202b8eb N |
2094 | if (frozen > 0) |
2095 | unfreeze(st); | |
5da9ab98 N |
2096 | return rv; |
2097 | } | |
7bc71196 | 2098 | |
f93346ef AK |
2099 | /* verify_reshape_position() |
2100 | * Function checks if reshape position in metadata is not farther | |
2101 | * than position in md. | |
2102 | * Return value: | |
2103 | * 0 : not valid sysfs entry | |
2104 | * it can be caused by not started reshape, it should be started | |
2105 | * by reshape array or raid0 array is before takeover | |
2106 | * -1 : error, reshape position is obviously wrong | |
2107 | * 1 : success, reshape progress correct or updated | |
2108 | */ | |
2109 | static int verify_reshape_position(struct mdinfo *info, int level) | |
2110 | { | |
2111 | int ret_val = 0; | |
2112 | char buf[40]; | |
178950ea | 2113 | int rv; |
f93346ef AK |
2114 | |
2115 | /* read sync_max, failure can mean raid0 array */ | |
178950ea AK |
2116 | rv = sysfs_get_str(info, NULL, "sync_max", buf, 40); |
2117 | ||
2118 | if (rv > 0) { | |
f93346ef AK |
2119 | char *ep; |
2120 | unsigned long long position = strtoull(buf, &ep, 0); | |
2121 | ||
1ade5cc1 | 2122 | dprintf("Read sync_max sysfs entry is: %s\n", buf); |
f93346ef AK |
2123 | if (!(ep == buf || (*ep != 0 && *ep != '\n' && *ep != ' '))) { |
2124 | position *= get_data_disks(level, | |
2125 | info->new_layout, | |
2126 | info->array.raid_disks); | |
2127 | if (info->reshape_progress < position) { | |
7a862a02 | 2128 | dprintf("Corrected reshape progress (%llu) to md position (%llu)\n", |
f93346ef AK |
2129 | info->reshape_progress, position); |
2130 | info->reshape_progress = position; | |
2131 | ret_val = 1; | |
2132 | } else if (info->reshape_progress > position) { | |
7a862a02 | 2133 | pr_err("Fatal error: array reshape was not properly frozen (expected reshape position is %llu, but reshape progress is %llu.\n", |
e7b84f9d | 2134 | position, info->reshape_progress); |
f93346ef AK |
2135 | ret_val = -1; |
2136 | } else { | |
7a862a02 | 2137 | dprintf("Reshape position in md and metadata are the same;"); |
f93346ef AK |
2138 | ret_val = 1; |
2139 | } | |
2140 | } | |
178950ea AK |
2141 | } else if (rv == 0) { |
2142 | /* for valid sysfs entry, 0-length content | |
2143 | * should be indicated as error | |
2144 | */ | |
2145 | ret_val = -1; | |
f93346ef AK |
2146 | } |
2147 | ||
2148 | return ret_val; | |
2149 | } | |
2150 | ||
534f5432 N |
2151 | static unsigned long long choose_offset(unsigned long long lo, |
2152 | unsigned long long hi, | |
2153 | unsigned long long min, | |
2154 | unsigned long long max) | |
2155 | { | |
2156 | /* Choose a new offset between hi and lo. | |
2157 | * It must be between min and max, but | |
2158 | * we would prefer something near the middle of hi/lo, and also | |
2159 | * prefer to be aligned to a big power of 2. | |
2160 | * | |
2161 | * So we start with the middle, then for each bit, | |
2162 | * starting at '1' and increasing, if it is set, we either | |
2163 | * add it or subtract it if possible, preferring the option | |
2164 | * which is furthest from the boundary. | |
2165 | * | |
2166 | * We stop once we get a 1MB alignment. As units are in sectors, | |
2167 | * 1MB = 2*1024 sectors. | |
2168 | */ | |
2169 | unsigned long long choice = (lo + hi) / 2; | |
2170 | unsigned long long bit = 1; | |
2171 | ||
2172 | for (bit = 1; bit < 2*1024; bit = bit << 1) { | |
2173 | unsigned long long bigger, smaller; | |
2174 | if (! (bit & choice)) | |
2175 | continue; | |
2176 | bigger = choice + bit; | |
2177 | smaller = choice - bit; | |
2178 | if (bigger > max && smaller < min) | |
2179 | break; | |
2180 | if (bigger > max) | |
2181 | choice = smaller; | |
2182 | else if (smaller < min) | |
2183 | choice = bigger; | |
2184 | else if (hi - bigger > smaller - lo) | |
2185 | choice = bigger; | |
2186 | else | |
2187 | choice = smaller; | |
2188 | } | |
2189 | return choice; | |
2190 | } | |
2191 | ||
13bbb145 | 2192 | static int set_new_data_offset(struct mdinfo *sra, struct supertype *st, |
50a4962f | 2193 | char *devname, int delta_disks, |
13bbb145 | 2194 | unsigned long long data_offset, |
6a23fb9d N |
2195 | unsigned long long min, |
2196 | int can_fallback) | |
19ceb16d | 2197 | { |
13bbb145 | 2198 | struct mdinfo *sd; |
19ceb16d N |
2199 | int dir = 0; |
2200 | int err = 0; | |
f9b08fec | 2201 | unsigned long long before, after; |
19ceb16d | 2202 | |
f9b08fec N |
2203 | /* Need to find min space before and after so same is used |
2204 | * on all devices | |
2205 | */ | |
2206 | before = UINT64_MAX; | |
2207 | after = UINT64_MAX; | |
19ceb16d N |
2208 | for (sd = sra->devs; sd; sd = sd->next) { |
2209 | char *dn; | |
2210 | int dfd; | |
2211 | int rv; | |
2212 | struct supertype *st2; | |
2213 | struct mdinfo info2; | |
2214 | ||
2215 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
2216 | continue; | |
2217 | dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
2218 | dfd = dev_open(dn, O_RDONLY); | |
2219 | if (dfd < 0) { | |
ed503f89 | 2220 | pr_err("%s: cannot open component %s\n", |
19ceb16d | 2221 | devname, dn ? dn : "-unknown-"); |
19ceb16d N |
2222 | goto release; |
2223 | } | |
2224 | st2 = dup_super(st); | |
2225 | rv = st2->ss->load_super(st2,dfd, NULL); | |
2226 | close(dfd); | |
2227 | if (rv) { | |
2228 | free(st2); | |
ed503f89 | 2229 | pr_err("%s: cannot get superblock from %s\n", |
19ceb16d N |
2230 | devname, dn); |
2231 | goto release; | |
2232 | } | |
2233 | st2->ss->getinfo_super(st2, &info2, NULL); | |
2234 | st2->ss->free_super(st2); | |
2235 | free(st2); | |
c4b26c64 N |
2236 | if (info2.space_before == 0 && |
2237 | info2.space_after == 0) { | |
2238 | /* Metadata doesn't support data_offset changes */ | |
dd243f56 N |
2239 | if (!can_fallback) |
2240 | pr_err("%s: Metadata version doesn't support data_offset changes\n", | |
2241 | devname); | |
16afb1a5 | 2242 | goto fallback; |
c4b26c64 | 2243 | } |
f9b08fec N |
2244 | if (before > info2.space_before) |
2245 | before = info2.space_before; | |
2246 | if (after > info2.space_after) | |
2247 | after = info2.space_after; | |
2248 | ||
2249 | if (data_offset != INVALID_SECTORS) { | |
2250 | if (dir == 0) { | |
2251 | if (info2.data_offset == data_offset) { | |
2252 | pr_err("%s: already has that data_offset\n", | |
2253 | dn); | |
2254 | goto release; | |
2255 | } | |
2256 | if (data_offset < info2.data_offset) | |
2257 | dir = -1; | |
2258 | else | |
2259 | dir = 1; | |
2260 | } else if ((data_offset <= info2.data_offset && dir == 1) || | |
2261 | (data_offset >= info2.data_offset && dir == -1)) { | |
2262 | pr_err("%s: differing data offsets on devices make this --data-offset setting impossible\n", | |
2263 | dn); | |
2264 | goto release; | |
2265 | } | |
2266 | } | |
2267 | } | |
2268 | if (before == UINT64_MAX) | |
2269 | /* impossible really, there must be no devices */ | |
2270 | return 1; | |
2271 | ||
2272 | for (sd = sra->devs; sd; sd = sd->next) { | |
2273 | char *dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
c0f0d812 | 2274 | unsigned long long new_data_offset; |
f9b08fec | 2275 | |
b397d7f3 N |
2276 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) |
2277 | continue; | |
50a4962f | 2278 | if (delta_disks < 0) { |
19ceb16d N |
2279 | /* Don't need any space as array is shrinking |
2280 | * just move data_offset up by min | |
2281 | */ | |
5582b118 | 2282 | if (data_offset == INVALID_SECTORS) |
c0f0d812 | 2283 | new_data_offset = sd->data_offset + min; |
19ceb16d | 2284 | else { |
c0f0d812 | 2285 | if (data_offset < sd->data_offset + min) { |
ed503f89 | 2286 | pr_err("--data-offset too small for %s\n", |
19ceb16d N |
2287 | dn); |
2288 | goto release; | |
2289 | } | |
c0f0d812 | 2290 | new_data_offset = data_offset; |
19ceb16d | 2291 | } |
50a4962f | 2292 | } else if (delta_disks > 0) { |
19ceb16d | 2293 | /* need space before */ |
f9b08fec | 2294 | if (before < min) { |
6a23fb9d N |
2295 | if (can_fallback) |
2296 | goto fallback; | |
ed503f89 | 2297 | pr_err("Insufficient head-space for reshape on %s\n", |
19ceb16d N |
2298 | dn); |
2299 | goto release; | |
2300 | } | |
5582b118 | 2301 | if (data_offset == INVALID_SECTORS) |
c0f0d812 | 2302 | new_data_offset = sd->data_offset - min; |
19ceb16d | 2303 | else { |
c0f0d812 | 2304 | if (data_offset > sd->data_offset - min) { |
ed503f89 | 2305 | pr_err("--data-offset too large for %s\n", |
19ceb16d N |
2306 | dn); |
2307 | goto release; | |
2308 | } | |
c0f0d812 | 2309 | new_data_offset = data_offset; |
19ceb16d N |
2310 | } |
2311 | } else { | |
2312 | if (dir == 0) { | |
f9b08fec N |
2313 | /* can move up or down. If 'data_offset' |
2314 | * was set we would have already decided, | |
2315 | * so just choose direction with most space. | |
19ceb16d | 2316 | */ |
c0f0d812 | 2317 | if (before > after) |
19ceb16d N |
2318 | dir = -1; |
2319 | else | |
2320 | dir = 1; | |
19ceb16d | 2321 | } |
b397d7f3 N |
2322 | sysfs_set_str(sra, NULL, "reshape_direction", |
2323 | dir == 1 ? "backwards" : "forwards"); | |
c0f0d812 N |
2324 | if (dir > 0) { |
2325 | /* Increase data offset */ | |
f9b08fec | 2326 | if (after < min) { |
6a23fb9d N |
2327 | if (can_fallback) |
2328 | goto fallback; | |
ed503f89 | 2329 | pr_err("Insufficient tail-space for reshape on %s\n", |
19ceb16d N |
2330 | dn); |
2331 | goto release; | |
2332 | } | |
5582b118 | 2333 | if (data_offset != INVALID_SECTORS && |
c0f0d812 | 2334 | data_offset < sd->data_offset + min) { |
ed503f89 | 2335 | pr_err("--data-offset too small on %s\n", |
19ceb16d N |
2336 | dn); |
2337 | goto release; | |
2338 | } | |
5582b118 | 2339 | if (data_offset != INVALID_SECTORS) |
c0f0d812 | 2340 | new_data_offset = data_offset; |
534f5432 N |
2341 | else |
2342 | new_data_offset = choose_offset(sd->data_offset, | |
2343 | sd->data_offset + after, | |
2344 | sd->data_offset + min, | |
2345 | sd->data_offset + after); | |
c0f0d812 N |
2346 | } else { |
2347 | /* Decrease data offset */ | |
f9b08fec | 2348 | if (before < min) { |
6a23fb9d N |
2349 | if (can_fallback) |
2350 | goto fallback; | |
ed503f89 | 2351 | pr_err("insufficient head-room on %s\n", |
19ceb16d N |
2352 | dn); |
2353 | goto release; | |
2354 | } | |
5582b118 | 2355 | if (data_offset != INVALID_SECTORS && |
c0f0d812 | 2356 | data_offset < sd->data_offset - min) { |
ed503f89 | 2357 | pr_err("--data-offset too small on %s\n", |
19ceb16d N |
2358 | dn); |
2359 | goto release; | |
2360 | } | |
5582b118 | 2361 | if (data_offset != INVALID_SECTORS) |
c0f0d812 | 2362 | new_data_offset = data_offset; |
534f5432 N |
2363 | else |
2364 | new_data_offset = choose_offset(sd->data_offset - before, | |
2365 | sd->data_offset, | |
2366 | sd->data_offset - before, | |
2367 | sd->data_offset - min); | |
19ceb16d N |
2368 | } |
2369 | } | |
a6a78630 N |
2370 | err = sysfs_set_num(sra, sd, "new_offset", new_data_offset); |
2371 | if (err < 0 && errno == E2BIG) { | |
2372 | /* try again after increasing data size to max */ | |
2373 | err = sysfs_set_num(sra, sd, "size", 0); | |
2374 | if (err < 0 && errno == EINVAL && | |
2375 | !(sd->disk.state & (1<<MD_DISK_SYNC))) { | |
2376 | /* some kernels have a bug where you cannot | |
2377 | * use '0' on spare devices. */ | |
2378 | sysfs_set_num(sra, sd, "size", | |
2379 | (sra->component_size + after)/2); | |
2380 | } | |
2381 | err = sysfs_set_num(sra, sd, "new_offset", | |
2382 | new_data_offset); | |
2383 | } | |
2384 | if (err < 0) { | |
d7e1f52b N |
2385 | if (errno == E2BIG && data_offset != INVALID_SECTORS) { |
2386 | pr_err("data-offset is too big for %s\n", | |
2387 | dn); | |
2388 | goto release; | |
2389 | } | |
9ad2a640 N |
2390 | if (sd == sra->devs && |
2391 | (errno == ENOENT || errno == E2BIG)) | |
2392 | /* Early kernel, no 'new_offset' file, | |
2393 | * or kernel doesn't like us. | |
93f174b9 N |
2394 | * For RAID5/6 this is not fatal |
2395 | */ | |
2396 | return 1; | |
ed503f89 | 2397 | pr_err("Cannot set new_offset for %s\n", |
19ceb16d N |
2398 | dn); |
2399 | break; | |
2400 | } | |
2401 | } | |
13bbb145 N |
2402 | return err; |
2403 | release: | |
2404 | return -1; | |
6a23fb9d N |
2405 | fallback: |
2406 | /* Just use a backup file */ | |
2407 | return 1; | |
13bbb145 N |
2408 | } |
2409 | ||
2410 | static int raid10_reshape(char *container, int fd, char *devname, | |
2411 | struct supertype *st, struct mdinfo *info, | |
2412 | struct reshape *reshape, | |
2413 | unsigned long long data_offset, | |
2414 | int force, int verbose) | |
2415 | { | |
2416 | /* Changing raid_disks, layout, chunksize or possibly | |
2417 | * just data_offset for a RAID10. | |
2418 | * We must always change data_offset. We change by at least | |
89ecd3cf | 2419 | * ->min_offset_change which is the largest of the old and new |
13bbb145 N |
2420 | * chunk sizes. |
2421 | * If raid_disks is increasing, then data_offset must decrease | |
2422 | * by at least this copy size. | |
2423 | * If raid_disks is unchanged, data_offset must increase or | |
89ecd3cf | 2424 | * decrease by at least min_offset_change but preferably by much more. |
13bbb145 N |
2425 | * We choose half of the available space. |
2426 | * If raid_disks is decreasing, data_offset must increase by | |
89ecd3cf | 2427 | * at least min_offset_change. To allow of this, component_size |
13bbb145 N |
2428 | * must be decreased by the same amount. |
2429 | * | |
2430 | * So we calculate the required minimum and direction, possibly | |
2431 | * reduce the component_size, then iterate through the devices | |
2432 | * and set the new_data_offset. | |
2433 | * If that all works, we set chunk_size, layout, raid_disks, and start | |
2434 | * 'reshape' | |
2435 | */ | |
2436 | struct mdinfo *sra; | |
2437 | unsigned long long min; | |
2438 | int err = 0; | |
2439 | ||
2440 | sra = sysfs_read(fd, NULL, | |
2441 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK | |
2442 | ); | |
2443 | if (!sra) { | |
ed503f89 | 2444 | pr_err("%s: Cannot get array details from sysfs\n", |
13bbb145 N |
2445 | devname); |
2446 | goto release; | |
2447 | } | |
89ecd3cf | 2448 | min = reshape->min_offset_change; |
13bbb145 N |
2449 | |
2450 | if (info->delta_disks) | |
2451 | sysfs_set_str(sra, NULL, "reshape_direction", | |
2452 | info->delta_disks < 0 ? "backwards" : "forwards"); | |
2453 | if (info->delta_disks < 0 && | |
89ecd3cf | 2454 | info->space_after < min) { |
13bbb145 N |
2455 | int rv = sysfs_set_num(sra, NULL, "component_size", |
2456 | (sra->component_size - | |
89ecd3cf | 2457 | min)/2); |
13bbb145 | 2458 | if (rv) { |
ed503f89 | 2459 | pr_err("cannot reduce component size\n"); |
13bbb145 N |
2460 | goto release; |
2461 | } | |
2462 | } | |
50a4962f | 2463 | err = set_new_data_offset(sra, st, devname, info->delta_disks, data_offset, |
6a23fb9d | 2464 | min, 0); |
93f174b9 N |
2465 | if (err == 1) { |
2466 | pr_err("Cannot set new_data_offset: RAID10 reshape not\n"); | |
2467 | cont_err("supported on this kernel\n"); | |
2468 | err = -1; | |
2469 | } | |
13bbb145 N |
2470 | if (err < 0) |
2471 | goto release; | |
2472 | ||
ee2429e0 | 2473 | if (!err && sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0) |
19ceb16d N |
2474 | err = errno; |
2475 | if (!err && sysfs_set_num(sra, NULL, "layout", reshape->after.layout) < 0) | |
2476 | err = errno; | |
2477 | if (!err && sysfs_set_num(sra, NULL, "raid_disks", | |
2478 | info->array.raid_disks + info->delta_disks) < 0) | |
2479 | err = errno; | |
2480 | if (!err && sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0) | |
2481 | err = errno; | |
2482 | if (err) { | |
ed503f89 | 2483 | pr_err("Cannot set array shape for %s\n", |
d33f1518 N |
2484 | devname); |
2485 | if (err == EBUSY && | |
2486 | (info->array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2487 | cont_err(" Bitmap must be removed before shape can be changed\n"); |
d33f1518 | 2488 | goto release; |
19ceb16d N |
2489 | } |
2490 | sysfs_free(sra); | |
2491 | return 0; | |
2492 | release: | |
2493 | sysfs_free(sra); | |
2494 | return 1; | |
2495 | } | |
2496 | ||
ee2429e0 N |
2497 | static void get_space_after(int fd, struct supertype *st, struct mdinfo *info) |
2498 | { | |
2499 | struct mdinfo *sra, *sd; | |
f3f09a52 LD |
2500 | /* Initialisation to silence compiler warning */ |
2501 | unsigned long long min_space_before = 0, min_space_after = 0; | |
ee2429e0 N |
2502 | int first = 1; |
2503 | ||
4dd2df09 | 2504 | sra = sysfs_read(fd, NULL, GET_DEVS); |
ee2429e0 N |
2505 | if (!sra) |
2506 | return; | |
2507 | for (sd = sra->devs; sd; sd = sd->next) { | |
2508 | char *dn; | |
2509 | int dfd; | |
2510 | struct supertype *st2; | |
2511 | struct mdinfo info2; | |
2512 | ||
2513 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
2514 | continue; | |
2515 | dn = map_dev(sd->disk.major, sd->disk.minor, 0); | |
2516 | dfd = dev_open(dn, O_RDONLY); | |
2517 | if (dfd < 0) | |
2518 | break; | |
2519 | st2 = dup_super(st); | |
2520 | if (st2->ss->load_super(st2,dfd, NULL)) { | |
2521 | close(dfd); | |
2522 | free(st2); | |
2523 | break; | |
2524 | } | |
2525 | close(dfd); | |
2526 | st2->ss->getinfo_super(st2, &info2, NULL); | |
2527 | st2->ss->free_super(st2); | |
2528 | free(st2); | |
2529 | if (first || | |
2530 | min_space_before > info2.space_before) | |
2531 | min_space_before = info2.space_before; | |
2532 | if (first || | |
2533 | min_space_after > info2.space_after) | |
2534 | min_space_after = info2.space_after; | |
2535 | first = 0; | |
2536 | } | |
2537 | if (sd == NULL && !first) { | |
2538 | info->space_after = min_space_after; | |
2539 | info->space_before = min_space_before; | |
2540 | } | |
2541 | sysfs_free(sra); | |
2542 | } | |
2543 | ||
434d167e N |
2544 | static void update_cache_size(char *container, struct mdinfo *sra, |
2545 | struct mdinfo *info, | |
2546 | int disks, unsigned long long blocks) | |
2547 | { | |
2548 | /* Check that the internal stripe cache is | |
2549 | * large enough, or it won't work. | |
2550 | * It must hold at least 4 stripes of the larger | |
2551 | * chunk size | |
2552 | */ | |
2553 | unsigned long cache; | |
2554 | cache = max(info->array.chunk_size, info->new_chunk); | |
2555 | cache *= 4; /* 4 stripes minimum */ | |
2556 | cache /= 512; /* convert to sectors */ | |
2557 | /* make sure there is room for 'blocks' with a bit to spare */ | |
2558 | if (cache < 16 + blocks / disks) | |
2559 | cache = 16 + blocks / disks; | |
caf9ac0c | 2560 | cache /= (4096/512); /* Convert from sectors to pages */ |
434d167e N |
2561 | |
2562 | if (sra->cache_size < cache) | |
2563 | subarray_set_num(container, sra, "stripe_cache_size", | |
2564 | cache+1); | |
2565 | } | |
2566 | ||
77afa056 N |
2567 | static int impose_reshape(struct mdinfo *sra, |
2568 | struct mdinfo *info, | |
2569 | struct supertype *st, | |
2570 | int fd, | |
2571 | int restart, | |
2572 | char *devname, char *container, | |
2573 | struct reshape *reshape) | |
2574 | { | |
2575 | struct mdu_array_info_s array; | |
2576 | ||
2577 | sra->new_chunk = info->new_chunk; | |
2578 | ||
2579 | if (restart) { | |
2580 | /* for external metadata checkpoint saved by mdmon can be lost | |
2581 | * or missed /due to e.g. crash/. Check if md is not during | |
2582 | * restart farther than metadata points to. | |
2583 | * If so, this means metadata information is obsolete. | |
2584 | */ | |
2585 | if (st->ss->external) | |
2586 | verify_reshape_position(info, reshape->level); | |
2587 | sra->reshape_progress = info->reshape_progress; | |
2588 | } else { | |
2589 | sra->reshape_progress = 0; | |
2590 | if (reshape->after.data_disks < reshape->before.data_disks) | |
2591 | /* start from the end of the new array */ | |
2592 | sra->reshape_progress = (sra->component_size | |
2593 | * reshape->after.data_disks); | |
2594 | } | |
2595 | ||
2596 | ioctl(fd, GET_ARRAY_INFO, &array); | |
2597 | if (info->array.chunk_size == info->new_chunk && | |
2598 | reshape->before.layout == reshape->after.layout && | |
2599 | st->ss->external == 0) { | |
2600 | /* use SET_ARRAY_INFO but only if reshape hasn't started */ | |
2601 | array.raid_disks = reshape->after.data_disks + reshape->parity; | |
2602 | if (!restart && | |
2603 | ioctl(fd, SET_ARRAY_INFO, &array) != 0) { | |
2604 | int err = errno; | |
2605 | ||
2606 | pr_err("Cannot set device shape for %s: %s\n", | |
2607 | devname, strerror(errno)); | |
2608 | ||
2609 | if (err == EBUSY && | |
2610 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2611 | cont_err("Bitmap must be removed before shape can be changed\n"); |
77afa056 N |
2612 | |
2613 | goto release; | |
2614 | } | |
2615 | } else if (!restart) { | |
2616 | /* set them all just in case some old 'new_*' value | |
2617 | * persists from some earlier problem. | |
2618 | */ | |
2619 | int err = 0; | |
2620 | if (sysfs_set_num(sra, NULL, "chunk_size", info->new_chunk) < 0) | |
2621 | err = errno; | |
2622 | if (!err && sysfs_set_num(sra, NULL, "layout", | |
2623 | reshape->after.layout) < 0) | |
2624 | err = errno; | |
2625 | if (!err && subarray_set_num(container, sra, "raid_disks", | |
2626 | reshape->after.data_disks + | |
2627 | reshape->parity) < 0) | |
2628 | err = errno; | |
2629 | if (err) { | |
2630 | pr_err("Cannot set device shape for %s\n", | |
2631 | devname); | |
2632 | ||
2633 | if (err == EBUSY && | |
2634 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2635 | cont_err("Bitmap must be removed before shape can be changed\n"); |
77afa056 N |
2636 | goto release; |
2637 | } | |
2638 | } | |
2639 | return 0; | |
2640 | release: | |
2641 | return -1; | |
2642 | } | |
2643 | ||
97e3a6a0 N |
2644 | static int impose_level(int fd, int level, char *devname, int verbose) |
2645 | { | |
2646 | char *c; | |
2647 | struct mdu_array_info_s array; | |
2648 | struct mdinfo info; | |
2649 | sysfs_init(&info, fd, NULL); | |
2650 | ||
2651 | ioctl(fd, GET_ARRAY_INFO, &array); | |
2652 | if (level == 0 && | |
2653 | (array.level >= 4 && array.level <= 6)) { | |
2654 | /* To convert to RAID0 we need to fail and | |
2655 | * remove any non-data devices. */ | |
2656 | int found = 0; | |
2657 | int d; | |
2658 | int data_disks = array.raid_disks - 1; | |
2659 | if (array.level == 6) | |
2660 | data_disks -= 1; | |
2661 | if (array.level == 5 && | |
2662 | array.layout != ALGORITHM_PARITY_N) | |
2663 | return -1; | |
2664 | if (array.level == 6 && | |
2665 | array.layout != ALGORITHM_PARITY_N_6) | |
2666 | return -1; | |
2667 | sysfs_set_str(&info, NULL,"sync_action", "idle"); | |
2668 | /* First remove any spares so no recovery starts */ | |
2669 | for (d = 0, found = 0; | |
2670 | d < MAX_DISKS && found < array.nr_disks; | |
2671 | d++) { | |
5e7be838 | 2672 | mdu_disk_info_t disk; |
97e3a6a0 N |
2673 | disk.number = d; |
2674 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
2675 | continue; | |
2676 | if (disk.major == 0 && disk.minor == 0) | |
2677 | continue; | |
2678 | found++; | |
2679 | if ((disk.state & (1 << MD_DISK_ACTIVE)) | |
2680 | && disk.raid_disk < data_disks) | |
2681 | /* keep this */ | |
2682 | continue; | |
2683 | ioctl(fd, HOT_REMOVE_DISK, | |
2684 | makedev(disk.major, disk.minor)); | |
2685 | } | |
2686 | /* Now fail anything left */ | |
2687 | ioctl(fd, GET_ARRAY_INFO, &array); | |
2688 | for (d = 0, found = 0; | |
2689 | d < MAX_DISKS && found < array.nr_disks; | |
2690 | d++) { | |
2691 | int cnt; | |
2692 | mdu_disk_info_t disk; | |
2693 | disk.number = d; | |
2694 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
2695 | continue; | |
2696 | if (disk.major == 0 && disk.minor == 0) | |
2697 | continue; | |
2698 | found++; | |
2699 | if ((disk.state & (1 << MD_DISK_ACTIVE)) | |
2700 | && disk.raid_disk < data_disks) | |
2701 | /* keep this */ | |
2702 | continue; | |
2703 | ioctl(fd, SET_DISK_FAULTY, | |
2704 | makedev(disk.major, disk.minor)); | |
2705 | cnt = 5; | |
2706 | while (ioctl(fd, HOT_REMOVE_DISK, | |
2707 | makedev(disk.major, disk.minor)) < 0 | |
2708 | && errno == EBUSY | |
2709 | && cnt--) { | |
2710 | usleep(10000); | |
2711 | } | |
2712 | } | |
2713 | } | |
2714 | c = map_num(pers, level); | |
2715 | if (c) { | |
2716 | int err = sysfs_set_str(&info, NULL, "level", c); | |
2717 | if (err) { | |
2718 | err = errno; | |
2719 | pr_err("%s: could not set level to %s\n", | |
2720 | devname, c); | |
2721 | if (err == EBUSY && | |
2722 | (array.state & (1<<MD_SB_BITMAP_PRESENT))) | |
7a862a02 | 2723 | cont_err("Bitmap must be removed before level can be changed\n"); |
97e3a6a0 N |
2724 | return err; |
2725 | } | |
2726 | if (verbose >= 0) | |
2727 | pr_err("level of %s changed to %s\n", | |
2728 | devname, c); | |
2729 | } | |
2730 | return 0; | |
2731 | } | |
2732 | ||
84d11e6c N |
2733 | int sigterm = 0; |
2734 | static void catch_term(int sig) | |
2735 | { | |
2736 | sigterm = 1; | |
2737 | } | |
2738 | ||
b0b67933 N |
2739 | static int continue_via_systemd(char *devnm) |
2740 | { | |
2741 | int skipped, i, pid, status; | |
2742 | char pathbuf[1024]; | |
2743 | /* In a systemd/udev world, it is best to get systemd to | |
2744 | * run "mdadm --grow --continue" rather than running in the | |
2745 | * background. | |
2746 | */ | |
2747 | switch(fork()) { | |
2748 | case 0: | |
2749 | /* FIXME yuk. CLOSE_EXEC?? */ | |
2750 | skipped = 0; | |
2751 | for (i = 3; skipped < 20; i++) | |
2752 | if (close(i) < 0) | |
2753 | skipped++; | |
2754 | else | |
2755 | skipped = 0; | |
2756 | ||
2757 | /* Don't want to see error messages from | |
2758 | * systemctl. If the service doesn't exist, | |
2759 | * we fork ourselves. | |
2760 | */ | |
2761 | close(2); | |
2762 | open("/dev/null", O_WRONLY); | |
2763 | snprintf(pathbuf, sizeof(pathbuf), "mdadm-grow-continue@%s.service", | |
2764 | devnm); | |
2765 | status = execl("/usr/bin/systemctl", "systemctl", | |
2766 | "start", | |
2767 | pathbuf, NULL); | |
2768 | status = execl("/bin/systemctl", "systemctl", "start", | |
2769 | pathbuf, NULL); | |
2770 | exit(1); | |
2771 | case -1: /* Just do it ourselves. */ | |
2772 | break; | |
2773 | default: /* parent - good */ | |
2774 | pid = wait(&status); | |
2775 | if (pid >= 0 && status == 0) | |
2776 | return 1; | |
2777 | } | |
2778 | return 0; | |
2779 | } | |
2780 | ||
5da9ab98 N |
2781 | static int reshape_array(char *container, int fd, char *devname, |
2782 | struct supertype *st, struct mdinfo *info, | |
e2e53a2d | 2783 | int force, struct mddev_dev *devlist, |
19ceb16d | 2784 | unsigned long long data_offset, |
ba728be7 | 2785 | char *backup_file, int verbose, int forked, |
b76b30e0 | 2786 | int restart, int freeze_reshape) |
5da9ab98 N |
2787 | { |
2788 | struct reshape reshape; | |
2789 | int spares_needed; | |
2790 | char *msg; | |
2791 | int orig_level = UnSet; | |
434d167e | 2792 | int odisks; |
1f9b0e28 | 2793 | int delayed; |
7bc71196 | 2794 | |
5da9ab98 N |
2795 | struct mdu_array_info_s array; |
2796 | char *c; | |
e86c9dd6 | 2797 | |
e2e53a2d N |
2798 | struct mddev_dev *dv; |
2799 | int added_disks; | |
2800 | ||
d152f53e JS |
2801 | int *fdlist = NULL; |
2802 | unsigned long long *offsets = NULL; | |
5da9ab98 N |
2803 | int d; |
2804 | int nrdisks; | |
2805 | int err; | |
da8100ca | 2806 | unsigned long blocks; |
5da9ab98 N |
2807 | unsigned long long array_size; |
2808 | int done; | |
cf6ac177 | 2809 | struct mdinfo *sra = NULL; |
13ffbe89 | 2810 | char buf[20]; |
7bc71196 | 2811 | |
9468aeac N |
2812 | /* when reshaping a RAID0, the component_size might be zero. |
2813 | * So try to fix that up. | |
2814 | */ | |
2815 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0) { | |
2816 | dprintf("Cannot get array information.\n"); | |
2817 | goto release; | |
2818 | } | |
2819 | if (array.level == 0 && info->component_size == 0) { | |
2820 | get_dev_size(fd, NULL, &array_size); | |
2821 | info->component_size = array_size / array.raid_disks; | |
2822 | } | |
2823 | ||
ee2429e0 N |
2824 | if (array.level == 10) |
2825 | /* Need space_after info */ | |
2826 | get_space_after(fd, st, info); | |
2827 | ||
3cb2aed2 N |
2828 | if (info->reshape_active) { |
2829 | int new_level = info->new_level; | |
2830 | info->new_level = UnSet; | |
ce4783d3 N |
2831 | if (info->delta_disks > 0) |
2832 | info->array.raid_disks -= info->delta_disks; | |
a73b0081 | 2833 | msg = analyse_change(devname, info, &reshape); |
3cb2aed2 | 2834 | info->new_level = new_level; |
ce4783d3 N |
2835 | if (info->delta_disks > 0) |
2836 | info->array.raid_disks += info->delta_disks; | |
fcdfb814 AK |
2837 | if (!restart) |
2838 | /* Make sure the array isn't read-only */ | |
2839 | ioctl(fd, RESTART_ARRAY_RW, 0); | |
3cb2aed2 | 2840 | } else |
a73b0081 | 2841 | msg = analyse_change(devname, info, &reshape); |
5da9ab98 | 2842 | if (msg) { |
a73b0081 N |
2843 | /* if msg == "", error has already been printed */ |
2844 | if (msg[0]) | |
2845 | pr_err("%s\n", msg); | |
631d7405 | 2846 | goto release; |
5da9ab98 | 2847 | } |
817ed7d6 N |
2848 | if (restart && |
2849 | (reshape.level != info->array.level || | |
2850 | reshape.before.layout != info->array.layout || | |
384e9be1 | 2851 | reshape.before.data_disks + reshape.parity |
ce4783d3 | 2852 | != info->array.raid_disks - max(0, info->delta_disks))) { |
7a862a02 | 2853 | pr_err("reshape info is not in native format - cannot continue.\n"); |
20a40eca N |
2854 | goto release; |
2855 | } | |
a93f87ee | 2856 | |
13ffbe89 PB |
2857 | if (st->ss->external && restart && (info->reshape_progress == 0) && |
2858 | !((sysfs_get_str(info, NULL, "sync_action", buf, sizeof(buf)) > 0) && | |
2859 | (strncmp(buf, "reshape", 7) == 0))) { | |
e1dd332a AK |
2860 | /* When reshape is restarted from '0', very begin of array |
2861 | * it is possible that for external metadata reshape and array | |
2862 | * configuration doesn't happen. | |
2863 | * Check if md has the same opinion, and reshape is restarted | |
2864 | * from 0. If so, this is regular reshape start after reshape | |
2865 | * switch in metadata to next array only. | |
2866 | */ | |
2867 | if ((verify_reshape_position(info, reshape.level) >= 0) && | |
2868 | (info->reshape_progress == 0)) | |
2869 | restart = 0; | |
2870 | } | |
a93f87ee N |
2871 | if (restart) { |
2872 | /* reshape already started. just skip to monitoring the reshape */ | |
2873 | if (reshape.backup_blocks == 0) | |
2874 | return 0; | |
8ecf12b9 N |
2875 | if (restart & RESHAPE_NO_BACKUP) |
2876 | return 0; | |
dfa4d769 N |
2877 | |
2878 | /* Need 'sra' down at 'started:' */ | |
2879 | sra = sysfs_read(fd, NULL, | |
2880 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK| | |
2881 | GET_CACHE); | |
2882 | if (!sra) { | |
2883 | pr_err("%s: Cannot get array details from sysfs\n", | |
2884 | devname); | |
2885 | goto release; | |
2886 | } | |
54ded86f N |
2887 | |
2888 | if (!backup_file) | |
2889 | backup_file = locate_backup(sra->sys_name); | |
2890 | ||
a93f87ee N |
2891 | goto started; |
2892 | } | |
a9c3e78f AK |
2893 | /* The container is frozen but the array may not be. |
2894 | * So freeze the array so spares don't get put to the wrong use | |
2895 | * FIXME there should probably be a cleaner separation between | |
2896 | * freeze_array and freeze_container. | |
2897 | */ | |
2898 | sysfs_freeze_array(info); | |
e06c4e59 | 2899 | /* Check we have enough spares to not be degraded */ |
e2e53a2d N |
2900 | added_disks = 0; |
2901 | for (dv = devlist; dv ; dv=dv->next) | |
2902 | added_disks++; | |
5da9ab98 N |
2903 | spares_needed = max(reshape.before.data_disks, |
2904 | reshape.after.data_disks) | |
2905 | + reshape.parity - array.raid_disks; | |
7bc71196 | 2906 | |
88c1a083 | 2907 | if (!force && |
e2e53a2d N |
2908 | info->new_level > 1 && info->array.level > 1 && |
2909 | spares_needed > info->array.spare_disks + added_disks) { | |
7a862a02 | 2910 | pr_err("Need %d spare%s to avoid degraded array, and only have %d.\n" |
e7b84f9d N |
2911 | " Use --force to over-ride this check.\n", |
2912 | spares_needed, | |
2913 | spares_needed == 1 ? "" : "s", | |
2914 | info->array.spare_disks + added_disks); | |
631d7405 | 2915 | goto release; |
7bc71196 | 2916 | } |
e06c4e59 N |
2917 | /* Check we have enough spares to not fail */ |
2918 | spares_needed = max(reshape.before.data_disks, | |
2919 | reshape.after.data_disks) | |
2920 | - array.raid_disks; | |
2921 | if ((info->new_level > 1 || info->new_level == 0) && | |
e2e53a2d | 2922 | spares_needed > info->array.spare_disks +added_disks) { |
7a862a02 | 2923 | pr_err("Need %d spare%s to create working array, and only have %d.\n", |
e7b84f9d N |
2924 | spares_needed, |
2925 | spares_needed == 1 ? "" : "s", | |
2926 | info->array.spare_disks + added_disks); | |
e06c4e59 N |
2927 | goto release; |
2928 | } | |
e86c9dd6 | 2929 | |
eae35f5c | 2930 | if (reshape.level != array.level) { |
97e3a6a0 N |
2931 | int err = impose_level(fd, reshape.level, devname, verbose); |
2932 | if (err) | |
631d7405 | 2933 | goto release; |
97e3a6a0 N |
2934 | info->new_layout = UnSet; /* after level change, |
2935 | * layout is meaningless */ | |
eae35f5c | 2936 | orig_level = array.level; |
3cd4e7c4 | 2937 | sysfs_freeze_array(info); |
e86c9dd6 | 2938 | |
16d4d84e AK |
2939 | if (reshape.level > 0 && st->ss->external) { |
2940 | /* make sure mdmon is aware of the new level */ | |
4dd2df09 | 2941 | if (mdmon_running(container)) |
78340e26 AK |
2942 | flush_mdmon(container); |
2943 | ||
4dd2df09 N |
2944 | if (!mdmon_running(container)) |
2945 | start_mdmon(container); | |
16d4d84e | 2946 | ping_monitor(container); |
4dd2df09 | 2947 | if (mdmon_running(container) && |
e919fb0a AK |
2948 | st->update_tail == NULL) |
2949 | st->update_tail = &st->updates; | |
16d4d84e | 2950 | } |
5da9ab98 | 2951 | } |
5da9ab98 N |
2952 | /* ->reshape_super might have chosen some spares from the |
2953 | * container that it wants to be part of the new array. | |
2954 | * We can collect them with ->container_content and give | |
2955 | * them to the kernel. | |
2956 | */ | |
2957 | if (st->ss->reshape_super && st->ss->container_content) { | |
2958 | char *subarray = strchr(info->text_version+1, '/')+1; | |
2959 | struct mdinfo *info2 = | |
2960 | st->ss->container_content(st, subarray); | |
2961 | struct mdinfo *d; | |
2962 | ||
2dd0d697 | 2963 | if (info2) { |
4dd2df09 | 2964 | sysfs_init(info2, fd, st->devnm); |
0d5ac3c6 N |
2965 | /* When increasing number of devices, we need to set |
2966 | * new raid_disks before adding these, or they might | |
2967 | * be rejected. | |
2968 | */ | |
2969 | if (reshape.backup_blocks && | |
2970 | reshape.after.data_disks > reshape.before.data_disks) | |
2971 | subarray_set_num(container, info2, "raid_disks", | |
2972 | reshape.after.data_disks + | |
2973 | reshape.parity); | |
5da9ab98 N |
2974 | for (d = info2->devs; d; d = d->next) { |
2975 | if (d->disk.state == 0 && | |
2976 | d->disk.raid_disk >= 0) { | |
2977 | /* This is a spare that wants to | |
2978 | * be part of the array. | |
2979 | */ | |
2980 | add_disk(fd, st, info2, d); | |
2981 | } | |
9860f271 | 2982 | } |
2dd0d697 AK |
2983 | sysfs_free(info2); |
2984 | } | |
5da9ab98 | 2985 | } |
e2e53a2d N |
2986 | /* We might have been given some devices to add to the |
2987 | * array. Now that the array has been changed to the right | |
2988 | * level and frozen, we can safely add them. | |
2989 | */ | |
2990 | if (devlist) | |
ba728be7 | 2991 | Manage_subdevs(devname, fd, devlist, verbose, |
11b391ec | 2992 | 0,NULL, 0); |
1686dc25 | 2993 | |
e09233d0 | 2994 | if (reshape.backup_blocks == 0 && data_offset != INVALID_SECTORS) |
8876bf0b | 2995 | reshape.backup_blocks = reshape.before.data_disks * info->array.chunk_size/512; |
b4f8e38b | 2996 | if (reshape.backup_blocks == 0) { |
5da9ab98 N |
2997 | /* No restriping needed, but we might need to impose |
2998 | * some more changes: layout, raid_disks, chunk_size | |
e86c9dd6 | 2999 | */ |
24aebf3a KW |
3000 | /* read current array info */ |
3001 | if (ioctl(fd, GET_ARRAY_INFO, &array) != 0) { | |
83732c28 | 3002 | dprintf("Cannot get array information.\n"); |
24aebf3a KW |
3003 | goto release; |
3004 | } | |
3005 | /* compare current array info with new values and if | |
3006 | * it is different update them to new */ | |
5da9ab98 | 3007 | if (info->new_layout != UnSet && |
24aebf3a KW |
3008 | info->new_layout != array.layout) { |
3009 | array.layout = info->new_layout; | |
3010 | if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) { | |
e7b84f9d | 3011 | pr_err("failed to set new layout\n"); |
631d7405 | 3012 | goto release; |
ba728be7 | 3013 | } else if (verbose >= 0) |
5da9ab98 | 3014 | printf("layout for %s set to %d\n", |
24aebf3a | 3015 | devname, array.layout); |
5da9ab98 N |
3016 | } |
3017 | if (info->delta_disks != UnSet && | |
24aebf3a KW |
3018 | info->delta_disks != 0 && |
3019 | array.raid_disks != (info->array.raid_disks + info->delta_disks)) { | |
3020 | array.raid_disks += info->delta_disks; | |
3021 | if (ioctl(fd, SET_ARRAY_INFO, &array) != 0) { | |
e7b84f9d | 3022 | pr_err("failed to set raid disks\n"); |
631d7405 | 3023 | goto release; |
ba728be7 | 3024 | } else if (verbose >= 0) { |
5da9ab98 | 3025 | printf("raid_disks for %s set to %d\n", |
24aebf3a KW |
3026 | devname, array.raid_disks); |
3027 | } | |
5da9ab98 N |
3028 | } |
3029 | if (info->new_chunk != 0 && | |
24aebf3a | 3030 | info->new_chunk != array.chunk_size) { |
5da9ab98 N |
3031 | if (sysfs_set_num(info, NULL, |
3032 | "chunk_size", info->new_chunk) != 0) { | |
e7b84f9d | 3033 | pr_err("failed to set chunk size\n"); |
631d7405 | 3034 | goto release; |
ba728be7 | 3035 | } else if (verbose >= 0) |
5da9ab98 | 3036 | printf("chunk size for %s set to %d\n", |
24aebf3a | 3037 | devname, array.chunk_size); |
4725bc31 | 3038 | } |
e35b189b | 3039 | unfreeze(st); |
631d7405 | 3040 | return 0; |
5da9ab98 | 3041 | } |
19678e53 | 3042 | |
5da9ab98 N |
3043 | /* |
3044 | * There are three possibilities. | |
3045 | * 1/ The array will shrink. | |
3046 | * We need to ensure the reshape will pause before reaching | |
3047 | * the 'critical section'. We also need to fork and wait for | |
24daa16f | 3048 | * that to happen. When it does we |
5da9ab98 N |
3049 | * suspend/backup/complete/unfreeze |
3050 | * | |
3051 | * 2/ The array will not change size. | |
3052 | * This requires that we keep a backup of a sliding window | |
3053 | * so that we can restore data after a crash. So we need | |
3054 | * to fork and monitor progress. | |
3055 | * In future we will allow the data_offset to change, so | |
3056 | * a sliding backup becomes unnecessary. | |
3057 | * | |
3058 | * 3/ The array will grow. This is relatively easy. | |
3059 | * However the kernel's restripe routines will cheerfully | |
3060 | * overwrite some early data before it is safe. So we | |
3061 | * need to make a backup of the early parts of the array | |
3062 | * and be ready to restore it if rebuild aborts very early. | |
3063 | * For externally managed metadata, we still need a forked | |
3064 | * child to monitor the reshape and suspend IO over the region | |
3065 | * that is being reshaped. | |
3066 | * | |
3067 | * We backup data by writing it to one spare, or to a | |
3068 | * file which was given on command line. | |
3069 | * | |
3070 | * In each case, we first make sure that storage is available | |
3071 | * for the required backup. | |
3072 | * Then we: | |
3073 | * - request the shape change. | |
3074 | * - fork to handle backup etc. | |
3075 | */ | |
5da9ab98 N |
3076 | /* Check that we can hold all the data */ |
3077 | get_dev_size(fd, NULL, &array_size); | |
3078 | if (reshape.new_size < (array_size/512)) { | |
e7b84f9d N |
3079 | pr_err("this change will reduce the size of the array.\n" |
3080 | " use --grow --array-size first to truncate array.\n" | |
3081 | " e.g. mdadm --grow %s --array-size %llu\n", | |
3082 | devname, reshape.new_size/2); | |
5da9ab98 N |
3083 | goto release; |
3084 | } | |
7236ee7a | 3085 | |
19ceb16d | 3086 | if (array.level == 10) { |
033d0929 | 3087 | /* Reshaping RAID10 does not require any data backup by |
19ceb16d N |
3088 | * user-space. Instead it requires that the data_offset |
3089 | * is changed to avoid the need for backup. | |
3090 | * So this is handled very separately | |
3091 | */ | |
3092 | if (restart) | |
3093 | /* Nothing to do. */ | |
3094 | return 0; | |
3095 | return raid10_reshape(container, fd, devname, st, info, | |
3096 | &reshape, data_offset, | |
3097 | force, verbose); | |
3098 | } | |
4dd2df09 | 3099 | sra = sysfs_read(fd, NULL, |
3656edcd | 3100 | GET_COMPONENT|GET_DEVS|GET_OFFSET|GET_STATE|GET_CHUNK| |
5da9ab98 | 3101 | GET_CACHE); |
5da9ab98 | 3102 | if (!sra) { |
e7b84f9d | 3103 | pr_err("%s: Cannot get array details from sysfs\n", |
5da9ab98 | 3104 | devname); |
5da9ab98 N |
3105 | goto release; |
3106 | } | |
7236ee7a | 3107 | |
8192902f | 3108 | if (!backup_file) |
199f1a1f N |
3109 | switch(set_new_data_offset(sra, st, devname, |
3110 | reshape.after.data_disks - reshape.before.data_disks, | |
8192902f | 3111 | data_offset, |
6a23fb9d | 3112 | reshape.min_offset_change, 1)) { |
63c12c89 N |
3113 | case -1: |
3114 | goto release; | |
3115 | case 0: | |
3116 | /* Updated data_offset, so it's easy now */ | |
3117 | update_cache_size(container, sra, info, | |
3118 | min(reshape.before.data_disks, | |
3119 | reshape.after.data_disks), | |
3120 | reshape.backup_blocks); | |
3121 | ||
3122 | /* Right, everything seems fine. Let's kick things off. | |
3123 | */ | |
3124 | sync_metadata(st); | |
3125 | ||
3126 | if (impose_reshape(sra, info, st, fd, restart, | |
3127 | devname, container, &reshape) < 0) | |
3128 | goto release; | |
3129 | if (sysfs_set_str(sra, NULL, "sync_action", "reshape") < 0) { | |
783bbc2b N |
3130 | struct mdinfo *sd; |
3131 | if (errno != EINVAL) { | |
3132 | pr_err("Failed to initiate reshape!\n"); | |
3133 | goto release; | |
3134 | } | |
3135 | /* revert data_offset and try the old way */ | |
3136 | for (sd = sra->devs; sd; sd = sd->next) { | |
3137 | sysfs_set_num(sra, sd, "new_offset", | |
3138 | sd->data_offset); | |
3139 | sysfs_set_str(sra, NULL, "reshape_direction", | |
3140 | "forwards"); | |
3141 | } | |
3142 | break; | |
63c12c89 | 3143 | } |
97e3a6a0 N |
3144 | if (info->new_level == reshape.level) |
3145 | return 0; | |
3146 | /* need to adjust level when reshape completes */ | |
3147 | switch(fork()) { | |
3148 | case -1: /* ignore error, but don't wait */ | |
3149 | return 0; | |
3150 | default: /* parent */ | |
3151 | return 0; | |
3152 | case 0: | |
3153 | map_fork(); | |
3154 | break; | |
3155 | } | |
3377ee42 | 3156 | close(fd); |
97e3a6a0 | 3157 | wait_reshape(sra); |
3377ee42 N |
3158 | fd = open_dev(sra->sys_name); |
3159 | if (fd >= 0) | |
3160 | impose_level(fd, info->new_level, devname, verbose); | |
63c12c89 N |
3161 | return 0; |
3162 | case 1: /* Couldn't set data_offset, try the old way */ | |
3163 | if (data_offset != INVALID_SECTORS) { | |
3164 | pr_err("Cannot update data_offset on this array\n"); | |
3165 | goto release; | |
3166 | } | |
3167 | break; | |
3168 | } | |
3169 | ||
8ecf12b9 | 3170 | started: |
5da9ab98 N |
3171 | /* Decide how many blocks (sectors) for a reshape |
3172 | * unit. The number we have so far is just a minimum | |
3173 | */ | |
b4f8e38b | 3174 | blocks = reshape.backup_blocks; |
24daa16f | 3175 | if (reshape.before.data_disks == |
5da9ab98 N |
3176 | reshape.after.data_disks) { |
3177 | /* Make 'blocks' bigger for better throughput, but | |
3178 | * not so big that we reject it below. | |
3179 | * Try for 16 megabytes | |
3180 | */ | |
3181 | while (blocks * 32 < sra->component_size && | |
3182 | blocks < 16*1024*2) | |
3183 | blocks *= 2; | |
3184 | } else | |
7a862a02 | 3185 | pr_err("Need to backup %luK of critical section..\n", blocks/2); |
5da9ab98 N |
3186 | |
3187 | if (blocks >= sra->component_size/2) { | |
7a862a02 | 3188 | pr_err("%s: Something wrong - reshape aborted\n", |
5da9ab98 | 3189 | devname); |
5da9ab98 N |
3190 | goto release; |
3191 | } | |
7236ee7a | 3192 | |
5da9ab98 N |
3193 | /* Now we need to open all these devices so we can read/write. |
3194 | */ | |
b8b286a6 N |
3195 | nrdisks = max(reshape.before.data_disks, |
3196 | reshape.after.data_disks) + reshape.parity | |
3197 | + sra->array.spare_disks; | |
503975b9 N |
3198 | fdlist = xcalloc((1+nrdisks), sizeof(int)); |
3199 | offsets = xcalloc((1+nrdisks), sizeof(offsets[0])); | |
e380d3be | 3200 | |
b8b286a6 N |
3201 | odisks = reshape.before.data_disks + reshape.parity; |
3202 | d = reshape_prepare_fdlist(devname, sra, odisks, | |
5da9ab98 N |
3203 | nrdisks, blocks, backup_file, |
3204 | fdlist, offsets); | |
8e7ddc5f | 3205 | if (d < odisks) { |
5da9ab98 N |
3206 | goto release; |
3207 | } | |
13c37ad3 AK |
3208 | if ((st->ss->manage_reshape == NULL) || |
3209 | (st->ss->recover_backup == NULL)) { | |
3210 | if (backup_file == NULL) { | |
3211 | if (reshape.after.data_disks <= | |
3212 | reshape.before.data_disks) { | |
be7c26b4 N |
3213 | pr_err("%s: Cannot grow - need backup-file\n", |
3214 | devname); | |
3215 | pr_err(" Please provide one with \"--backup=...\"\n"); | |
13c37ad3 | 3216 | goto release; |
8e7ddc5f | 3217 | } else if (d == odisks) { |
7a862a02 | 3218 | pr_err("%s: Cannot grow - need a spare or backup-file to backup critical section\n", devname); |
13c37ad3 AK |
3219 | goto release; |
3220 | } | |
3221 | } else { | |
3222 | if (!reshape_open_backup_file(backup_file, fd, devname, | |
3223 | (signed)blocks, | |
3224 | fdlist+d, offsets+d, | |
54ded86f | 3225 | sra->sys_name, |
13c37ad3 AK |
3226 | restart)) { |
3227 | goto release; | |
3228 | } | |
3229 | d++; | |
e86c9dd6 | 3230 | } |
5da9ab98 | 3231 | } |
7236ee7a | 3232 | |
434d167e N |
3233 | update_cache_size(container, sra, info, |
3234 | min(reshape.before.data_disks, reshape.after.data_disks), | |
3235 | blocks); | |
5da9ab98 N |
3236 | |
3237 | /* Right, everything seems fine. Let's kick things off. | |
3238 | * If only changing raid_disks, use ioctl, else use | |
3239 | * sysfs. | |
3240 | */ | |
3241 | sync_metadata(st); | |
3242 | ||
77afa056 N |
3243 | if (impose_reshape(sra, info, st, fd, restart, |
3244 | devname, container, &reshape) < 0) | |
3245 | goto release; | |
e86c9dd6 | 3246 | |
27a1e5b5 N |
3247 | err = start_reshape(sra, restart, reshape.before.data_disks, |
3248 | reshape.after.data_disks); | |
fab32c97 | 3249 | if (err) { |
e7b84f9d N |
3250 | pr_err("Cannot %s reshape for %s\n", |
3251 | restart ? "continue" : "start", | |
3252 | devname); | |
fab32c97 AK |
3253 | goto release; |
3254 | } | |
a93f87ee N |
3255 | if (restart) |
3256 | sysfs_set_str(sra, NULL, "array_state", "active"); | |
b76b30e0 AK |
3257 | if (freeze_reshape) { |
3258 | free(fdlist); | |
3259 | free(offsets); | |
3260 | sysfs_free(sra); | |
7a862a02 | 3261 | pr_err("Reshape has to be continued from location %llu when root filesystem has been mounted.\n", |
b76b30e0 AK |
3262 | sra->reshape_progress); |
3263 | return 1; | |
3264 | } | |
5da9ab98 | 3265 | |
b0b67933 N |
3266 | if (!forked && !check_env("MDADM_NO_SYSTEMCTL")) |
3267 | if (continue_via_systemd(container ?: sra->sys_name)) { | |
3268 | free(fdlist); | |
3269 | free(offsets); | |
3270 | sysfs_free(sra); | |
3271 | return 0; | |
5e76dce1 | 3272 | } |
5e76dce1 | 3273 | |
5da9ab98 N |
3274 | /* Now we just need to kick off the reshape and watch, while |
3275 | * handling backups of the data... | |
3276 | * This is all done by a forked background process. | |
3277 | */ | |
3278 | switch(forked ? 0 : fork()) { | |
6b2d630c | 3279 | case -1: |
e7b84f9d | 3280 | pr_err("Cannot run child to monitor reshape: %s\n", |
6b2d630c | 3281 | strerror(errno)); |
6b2d630c | 3282 | abort_reshape(sra); |
631d7405 | 3283 | goto release; |
6b2d630c | 3284 | default: |
d152f53e JS |
3285 | free(fdlist); |
3286 | free(offsets); | |
3287 | sysfs_free(sra); | |
6b2d630c | 3288 | return 0; |
5da9ab98 | 3289 | case 0: |
cc700db3 | 3290 | map_fork(); |
6b2d630c N |
3291 | break; |
3292 | } | |
5da9ab98 | 3293 | |
1f9b0e28 N |
3294 | /* If another array on the same devices is busy, the |
3295 | * reshape will wait for them. This would mean that | |
3296 | * the first section that we suspend will stay suspended | |
3297 | * for a long time. So check on that possibility | |
3298 | * by looking for "DELAYED" in /proc/mdstat, and if found, | |
3299 | * wait a while | |
3300 | */ | |
3301 | do { | |
3302 | struct mdstat_ent *mds, *m; | |
3303 | delayed = 0; | |
a7a0d8a1 | 3304 | mds = mdstat_read(1, 0); |
ae0dcfbd | 3305 | for (m = mds; m; m = m->next) |
4dd2df09 | 3306 | if (strcmp(m->devnm, sra->sys_name) == 0) { |
1f9b0e28 N |
3307 | if (m->resync && |
3308 | m->percent == RESYNC_DELAYED) | |
3309 | delayed = 1; | |
3310 | if (m->resync == 0) | |
3311 | /* Haven't started the reshape thread | |
3312 | * yet, wait a bit | |
3313 | */ | |
3314 | delayed = 2; | |
3315 | break; | |
3316 | } | |
3317 | free_mdstat(mds); | |
3318 | if (delayed == 1 && get_linux_version() < 3007000) { | |
3319 | pr_err("Reshape is delayed, but cannot wait carefully with this kernel.\n" | |
3320 | " You might experience problems until other reshapes complete.\n"); | |
3321 | delayed = 0; | |
3322 | } | |
3323 | if (delayed) | |
a7a0d8a1 | 3324 | mdstat_wait(30 - (delayed-1) * 25); |
1f9b0e28 | 3325 | } while (delayed); |
a7a0d8a1 | 3326 | mdstat_close(); |
6b2d630c N |
3327 | close(fd); |
3328 | if (check_env("MDADM_GROW_VERIFY")) | |
3329 | fd = open(devname, O_RDONLY | O_DIRECT); | |
3330 | else | |
3331 | fd = -1; | |
3332 | mlockall(MCL_FUTURE); | |
5da9ab98 | 3333 | |
84d11e6c N |
3334 | signal(SIGTERM, catch_term); |
3335 | ||
6b2d630c N |
3336 | if (st->ss->external) { |
3337 | /* metadata handler takes it from here */ | |
3338 | done = st->ss->manage_reshape( | |
3339 | fd, sra, &reshape, st, blocks, | |
3340 | fdlist, offsets, | |
3341 | d - odisks, fdlist+odisks, | |
3342 | offsets+odisks); | |
3343 | } else | |
3344 | done = child_monitor( | |
3345 | fd, sra, &reshape, st, blocks, | |
3346 | fdlist, offsets, | |
3347 | d - odisks, fdlist+odisks, | |
3348 | offsets+odisks); | |
3349 | ||
d152f53e JS |
3350 | free(fdlist); |
3351 | free(offsets); | |
3352 | ||
54ded86f N |
3353 | if (backup_file && done) { |
3354 | char *bul; | |
54ded86f N |
3355 | bul = make_backup(sra->sys_name); |
3356 | if (bul) { | |
5e76dce1 | 3357 | char buf[1024]; |
9eb5ce5a | 3358 | int l = readlink(bul, buf, sizeof(buf) - 1); |
5e76dce1 N |
3359 | if (l > 0) { |
3360 | buf[l]=0; | |
3361 | unlink(buf); | |
3362 | } | |
54ded86f N |
3363 | unlink(bul); |
3364 | free(bul); | |
3365 | } | |
5e76dce1 | 3366 | unlink(backup_file); |
54ded86f | 3367 | } |
6b2d630c N |
3368 | if (!done) { |
3369 | abort_reshape(sra); | |
3370 | goto out; | |
3371 | } | |
1cbc5680 N |
3372 | |
3373 | if (!st->ss->external && | |
3374 | !(reshape.before.data_disks != reshape.after.data_disks | |
3375 | && info->custom_array_size) && | |
3376 | info->new_level == reshape.level && | |
3377 | !forked) { | |
3378 | /* no need to wait for the reshape to finish as | |
3379 | * there is nothing more to do. | |
3380 | */ | |
d152f53e | 3381 | sysfs_free(sra); |
1cbc5680 N |
3382 | exit(0); |
3383 | } | |
3384 | wait_reshape(sra); | |
3385 | ||
3386 | if (st->ss->external) { | |
3387 | /* Re-load the metadata as much could have changed */ | |
4dd2df09 | 3388 | int cfd = open_dev(st->container_devnm); |
1cbc5680 | 3389 | if (cfd >= 0) { |
78340e26 | 3390 | flush_mdmon(container); |
1cbc5680 N |
3391 | st->ss->free_super(st); |
3392 | st->ss->load_container(st, cfd, container); | |
3393 | close(cfd); | |
3394 | } | |
3395 | } | |
3396 | ||
6b2d630c N |
3397 | /* set new array size if required customer_array_size is used |
3398 | * by this metadata. | |
3399 | */ | |
3400 | if (reshape.before.data_disks != | |
3401 | reshape.after.data_disks && | |
54397ed9 AK |
3402 | info->custom_array_size) |
3403 | set_array_size(st, info, info->text_version); | |
582496b2 | 3404 | |
6b2d630c | 3405 | if (info->new_level != reshape.level) { |
97e3a6a0 N |
3406 | if (fd < 0) |
3407 | fd = open(devname, O_RDONLY); | |
3408 | impose_level(fd, info->new_level, devname, verbose); | |
3409 | close(fd); | |
e919fb0a AK |
3410 | if (info->new_level == 0) |
3411 | st->update_tail = NULL; | |
7236ee7a | 3412 | } |
6b2d630c | 3413 | out: |
d152f53e | 3414 | sysfs_free(sra); |
6b2d630c N |
3415 | if (forked) |
3416 | return 0; | |
e84f2c00 | 3417 | unfreeze(st); |
6b2d630c | 3418 | exit(0); |
e86c9dd6 | 3419 | |
6b2d630c | 3420 | release: |
d152f53e JS |
3421 | free(fdlist); |
3422 | free(offsets); | |
1cbc5680 | 3423 | if (orig_level != UnSet && sra) { |
7236ee7a N |
3424 | c = map_num(pers, orig_level); |
3425 | if (c && sysfs_set_str(sra, NULL, "level", c) == 0) | |
e7b84f9d | 3426 | pr_err("aborting level change\n"); |
7236ee7a | 3427 | } |
d152f53e | 3428 | sysfs_free(sra); |
9202b8eb N |
3429 | if (!forked) |
3430 | unfreeze(st); | |
631d7405 | 3431 | return 1; |
7236ee7a | 3432 | } |
e86c9dd6 | 3433 | |
9ad6f6e6 AK |
3434 | /* mdfd handle is passed to be closed in child process (after fork). |
3435 | */ | |
493f5dd6 | 3436 | int reshape_container(char *container, char *devname, |
9ad6f6e6 | 3437 | int mdfd, |
24daa16f | 3438 | struct supertype *st, |
5da9ab98 N |
3439 | struct mdinfo *info, |
3440 | int force, | |
b0140ae8 N |
3441 | char *backup_file, int verbose, |
3442 | int forked, int restart, int freeze_reshape) | |
5da9ab98 | 3443 | { |
1bb174ba | 3444 | struct mdinfo *cc = NULL; |
bcc9e9ed | 3445 | int rv = restart; |
4dd2df09 | 3446 | char last_devnm[32] = ""; |
1bb174ba | 3447 | |
d8eb27f7 | 3448 | /* component_size is not meaningful for a container, |
7ec0996c | 3449 | * so pass '0' meaning 'no change' |
d8eb27f7 | 3450 | */ |
493f5dd6 | 3451 | if (!restart && |
7ec0996c | 3452 | reshape_super(st, 0, info->new_level, |
5da9ab98 | 3453 | info->new_layout, info->new_chunk, |
41784c88 | 3454 | info->array.raid_disks, info->delta_disks, |
016e00f5 | 3455 | backup_file, devname, APPLY_METADATA_CHANGES, |
ba728be7 | 3456 | verbose)) { |
9e325442 | 3457 | unfreeze(st); |
5da9ab98 | 3458 | return 1; |
9e325442 | 3459 | } |
5da9ab98 N |
3460 | |
3461 | sync_metadata(st); | |
3462 | ||
1bb174ba AK |
3463 | /* ping monitor to be sure that update is on disk |
3464 | */ | |
3465 | ping_monitor(container); | |
5da9ab98 | 3466 | |
40b941b8 | 3467 | if (!forked && !freeze_reshape && !check_env("MDADM_NO_SYSTEMCTL")) |
4e0eb0db N |
3468 | if (continue_via_systemd(container)) |
3469 | return 0; | |
3470 | ||
b0140ae8 | 3471 | switch (forked ? 0 : fork()) { |
5da9ab98 N |
3472 | case -1: /* error */ |
3473 | perror("Cannot fork to complete reshape\n"); | |
9e325442 | 3474 | unfreeze(st); |
5da9ab98 N |
3475 | return 1; |
3476 | default: /* parent */ | |
b76b30e0 | 3477 | if (!freeze_reshape) |
7a862a02 | 3478 | printf("%s: multi-array reshape continues in background\n", Name); |
5da9ab98 N |
3479 | return 0; |
3480 | case 0: /* child */ | |
cc700db3 | 3481 | map_fork(); |
5da9ab98 N |
3482 | break; |
3483 | } | |
3484 | ||
9ad6f6e6 AK |
3485 | /* close unused handle in child process |
3486 | */ | |
3487 | if (mdfd > -1) | |
3488 | close(mdfd); | |
3489 | ||
1bb174ba AK |
3490 | while(1) { |
3491 | /* For each member array with reshape_active, | |
3492 | * we need to perform the reshape. | |
3493 | * We pick the first array that needs reshaping and | |
3494 | * reshape it. reshape_array() will re-read the metadata | |
3495 | * so the next time through a different array should be | |
3496 | * ready for reshape. | |
493f5dd6 N |
3497 | * It is possible that the 'different' array will not |
3498 | * be assembled yet. In that case we simple exit. | |
3499 | * When it is assembled, the mdadm which assembles it | |
3500 | * will take over the reshape. | |
1bb174ba AK |
3501 | */ |
3502 | struct mdinfo *content; | |
5da9ab98 N |
3503 | int fd; |
3504 | struct mdstat_ent *mdstat; | |
5da9ab98 | 3505 | char *adev; |
4dd2df09 | 3506 | int devid; |
5da9ab98 | 3507 | |
1bb174ba | 3508 | sysfs_free(cc); |
5da9ab98 | 3509 | |
1bb174ba AK |
3510 | cc = st->ss->container_content(st, NULL); |
3511 | ||
3512 | for (content = cc; content ; content = content->next) { | |
3513 | char *subarray; | |
3514 | if (!content->reshape_active) | |
3515 | continue; | |
3516 | ||
3517 | subarray = strchr(content->text_version+1, '/')+1; | |
4dd2df09 | 3518 | mdstat = mdstat_by_subdev(subarray, container); |
1bb174ba AK |
3519 | if (!mdstat) |
3520 | continue; | |
1ca90aa6 | 3521 | if (mdstat->active == 0) { |
4dd2df09 N |
3522 | pr_err("Skipping inactive array %s.\n", |
3523 | mdstat->devnm); | |
1ca90aa6 AK |
3524 | free_mdstat(mdstat); |
3525 | mdstat = NULL; | |
3526 | continue; | |
3527 | } | |
1bb174ba AK |
3528 | break; |
3529 | } | |
3530 | if (!content) | |
3531 | break; | |
5da9ab98 | 3532 | |
4dd2df09 N |
3533 | devid = devnm2devid(mdstat->devnm); |
3534 | adev = map_dev(major(devid), minor(devid), 0); | |
5da9ab98 | 3535 | if (!adev) |
1bb174ba AK |
3536 | adev = content->text_version; |
3537 | ||
4dd2df09 | 3538 | fd = open_dev(mdstat->devnm); |
97a3490c | 3539 | if (fd < 0) { |
1ade5cc1 | 3540 | pr_err("Device %s cannot be opened for reshape.\n", adev); |
97a3490c AK |
3541 | break; |
3542 | } | |
3543 | ||
4dd2df09 | 3544 | if (strcmp(last_devnm, mdstat->devnm) == 0) { |
2d04d7e5 AK |
3545 | /* Do not allow for multiple reshape_array() calls for |
3546 | * the same array. | |
3547 | * It can happen when reshape_array() returns without | |
3548 | * error, when reshape is not finished (wrong reshape | |
3549 | * starting/continuation conditions). Mdmon doesn't | |
3550 | * switch to next array in container and reentry | |
3551 | * conditions for the same array occur. | |
3552 | * This is possibly interim until the behaviour of | |
3553 | * reshape_array is resolved(). | |
3554 | */ | |
7a862a02 | 3555 | printf("%s: Multiple reshape execution detected for device %s.\n", Name, adev); |
2d04d7e5 AK |
3556 | close(fd); |
3557 | break; | |
3558 | } | |
4dd2df09 | 3559 | strcpy(last_devnm, mdstat->devnm); |
2d04d7e5 | 3560 | |
4dd2df09 | 3561 | sysfs_init(content, fd, mdstat->devnm); |
5da9ab98 | 3562 | |
4dd2df09 | 3563 | if (mdmon_running(container)) |
78340e26 AK |
3564 | flush_mdmon(container); |
3565 | ||
1bb174ba | 3566 | rv = reshape_array(container, fd, adev, st, |
ca36d707 | 3567 | content, force, NULL, INVALID_SECTORS, |
ba728be7 | 3568 | backup_file, verbose, 1, restart, |
b76b30e0 | 3569 | freeze_reshape); |
5da9ab98 | 3570 | close(fd); |
b76b30e0 AK |
3571 | |
3572 | if (freeze_reshape) { | |
3573 | sysfs_free(cc); | |
3574 | exit(0); | |
3575 | } | |
3576 | ||
493f5dd6 | 3577 | restart = 0; |
5da9ab98 N |
3578 | if (rv) |
3579 | break; | |
78340e26 | 3580 | |
4dd2df09 | 3581 | if (mdmon_running(container)) |
78340e26 | 3582 | flush_mdmon(container); |
5da9ab98 | 3583 | } |
bcc9e9ed AK |
3584 | if (!rv) |
3585 | unfreeze(st); | |
1bb174ba | 3586 | sysfs_free(cc); |
5da9ab98 N |
3587 | exit(0); |
3588 | } | |
3589 | ||
7236ee7a N |
3590 | /* |
3591 | * We run a child process in the background which performs the following | |
3592 | * steps: | |
3593 | * - wait for resync to reach a certain point | |
3594 | * - suspend io to the following section | |
3595 | * - backup that section | |
3596 | * - allow resync to proceed further | |
3597 | * - resume io | |
3598 | * - discard the backup. | |
3599 | * | |
3600 | * When are combined in slightly different ways in the three cases. | |
3601 | * Grow: | |
3602 | * - suspend/backup/allow/wait/resume/discard | |
3603 | * Shrink: | |
3604 | * - allow/wait/suspend/backup/allow/wait/resume/discard | |
3605 | * same-size: | |
3606 | * - wait/resume/discard/suspend/backup/allow | |
3607 | * | |
3608 | * suspend/backup/allow always come together | |
3609 | * wait/resume/discard do too. | |
3610 | * For the same-size case we have two backups to improve flow. | |
24daa16f | 3611 | * |
7236ee7a | 3612 | */ |
e86c9dd6 | 3613 | |
7443ee81 N |
3614 | int progress_reshape(struct mdinfo *info, struct reshape *reshape, |
3615 | unsigned long long backup_point, | |
3616 | unsigned long long wait_point, | |
3617 | unsigned long long *suspend_point, | |
a6b2d86c | 3618 | unsigned long long *reshape_completed, int *frozen) |
7443ee81 N |
3619 | { |
3620 | /* This function is called repeatedly by the reshape manager. | |
3621 | * It determines how much progress can safely be made and allows | |
3622 | * that progress. | |
3623 | * - 'info' identifies the array and particularly records in | |
3624 | * ->reshape_progress the metadata's knowledge of progress | |
3625 | * This is a sector offset from the start of the array | |
3626 | * of the next array block to be relocated. This number | |
3627 | * may increase from 0 or decrease from array_size, depending | |
3628 | * on the type of reshape that is happening. | |
3629 | * Note that in contrast, 'sync_completed' is a block count of the | |
3630 | * reshape so far. It gives the distance between the start point | |
3631 | * (head or tail of device) and the next place that data will be | |
3632 | * written. It always increases. | |
3633 | * - 'reshape' is the structure created by analyse_change | |
3634 | * - 'backup_point' shows how much the metadata manager has backed-up | |
3635 | * data. For reshapes with increasing progress, it is the next address | |
3636 | * to be backed up, previous addresses have been backed-up. For | |
3637 | * decreasing progress, it is the earliest address that has been | |
3638 | * backed up - later address are also backed up. | |
3639 | * So addresses between reshape_progress and backup_point are | |
3640 | * backed up providing those are in the 'correct' order. | |
3641 | * - 'wait_point' is an array address. When reshape_completed | |
3642 | * passes this point, progress_reshape should return. It might | |
3643 | * return earlier if it determines that ->reshape_progress needs | |
3644 | * to be updated or further backup is needed. | |
3645 | * - suspend_point is maintained by progress_reshape and the caller | |
3646 | * should not touch it except to initialise to zero. | |
3647 | * It is an array address and it only increases in 2.6.37 and earlier. | |
b6b95155 | 3648 | * This makes it difficult to handle reducing reshapes with |
7443ee81 N |
3649 | * external metadata. |
3650 | * However: it is similar to backup_point in that it records the | |
3651 | * other end of a suspended region from reshape_progress. | |
3652 | * it is moved to extend the region that is safe to backup and/or | |
3653 | * reshape | |
3654 | * - reshape_completed is read from sysfs and returned. The caller | |
3655 | * should copy this into ->reshape_progress when it has reason to | |
3656 | * believe that the metadata knows this, and any backup outside this | |
3657 | * has been erased. | |
3658 | * | |
3659 | * Return value is: | |
3660 | * 1 if more data from backup_point - but only as far as suspend_point, | |
3661 | * should be backed up | |
3662 | * 0 if things are progressing smoothly | |
9e034f70 N |
3663 | * -1 if the reshape is finished because it is all done, |
3664 | * -2 if the reshape is finished due to an error. | |
7443ee81 N |
3665 | */ |
3666 | ||
3667 | int advancing = (reshape->after.data_disks | |
3668 | >= reshape->before.data_disks); | |
38dad34a N |
3669 | unsigned long long need_backup; /* All data between start of array and |
3670 | * here will at some point need to | |
3671 | * be backed up. | |
d0ab945e | 3672 | */ |
7443ee81 | 3673 | unsigned long long read_offset, write_offset; |
b4f8e38b | 3674 | unsigned long long write_range; |
7443ee81 | 3675 | unsigned long long max_progress, target, completed; |
d0ab945e N |
3676 | unsigned long long array_size = (info->component_size |
3677 | * reshape->before.data_disks); | |
7443ee81 | 3678 | int fd; |
77a73a17 | 3679 | char buf[20]; |
7443ee81 N |
3680 | |
3681 | /* First, we unsuspend any region that is now known to be safe. | |
3682 | * If suspend_point is on the 'wrong' side of reshape_progress, then | |
3683 | * we don't have or need suspension at the moment. This is true for | |
3684 | * native metadata when we don't need to back-up. | |
3685 | */ | |
3686 | if (advancing) { | |
49cd738b | 3687 | if (info->reshape_progress <= *suspend_point) |
7443ee81 N |
3688 | sysfs_set_num(info, NULL, "suspend_lo", |
3689 | info->reshape_progress); | |
3690 | } else { | |
3691 | /* Note: this won't work in 2.6.37 and before. | |
3692 | * Something somewhere should make sure we don't need it! | |
3693 | */ | |
49cd738b | 3694 | if (info->reshape_progress >= *suspend_point) |
7443ee81 N |
3695 | sysfs_set_num(info, NULL, "suspend_hi", |
3696 | info->reshape_progress); | |
3697 | } | |
3698 | ||
3699 | /* Now work out how far it is safe to progress. | |
3700 | * If the read_offset for ->reshape_progress is less than | |
3701 | * 'blocks' beyond the write_offset, we can only progress as far | |
3702 | * as a backup. | |
3703 | * Otherwise we can progress until the write_offset for the new location | |
3704 | * reaches (within 'blocks' of) the read_offset at the current location. | |
3705 | * However that region must be suspended unless we are using native | |
3706 | * metadata. | |
3707 | * If we need to suspend more, we limit it to 128M per device, which is | |
3708 | * rather arbitrary and should be some time-based calculation. | |
3709 | */ | |
ec757320 N |
3710 | read_offset = info->reshape_progress / reshape->before.data_disks; |
3711 | write_offset = info->reshape_progress / reshape->after.data_disks; | |
b4f8e38b | 3712 | write_range = info->new_chunk/512; |
38dad34a N |
3713 | if (reshape->before.data_disks == reshape->after.data_disks) |
3714 | need_backup = array_size; | |
3715 | else | |
3716 | need_backup = reshape->backup_blocks; | |
7443ee81 | 3717 | if (advancing) { |
38dad34a | 3718 | if (read_offset < write_offset + write_range) |
7443ee81 | 3719 | max_progress = backup_point; |
ddee071d | 3720 | else |
7443ee81 | 3721 | max_progress = |
2f3dd5e4 N |
3722 | read_offset * |
3723 | reshape->after.data_disks; | |
7443ee81 | 3724 | } else { |
38dad34a N |
3725 | if (read_offset > write_offset - write_range) |
3726 | /* Can only progress as far as has been backed up, | |
3727 | * which must be suspended */ | |
7443ee81 | 3728 | max_progress = backup_point; |
38dad34a N |
3729 | else if (info->reshape_progress <= need_backup) |
3730 | max_progress = backup_point; | |
3731 | else { | |
3732 | if (info->array.major_version >= 0) | |
3733 | /* Can progress until backup is needed */ | |
3734 | max_progress = need_backup; | |
3735 | else { | |
3736 | /* Can progress until metadata update is required */ | |
3737 | max_progress = | |
3738 | read_offset * | |
3739 | reshape->after.data_disks; | |
3740 | /* but data must be suspended */ | |
3741 | if (max_progress < *suspend_point) | |
3742 | max_progress = *suspend_point; | |
3743 | } | |
7443ee81 N |
3744 | } |
3745 | } | |
3746 | ||
3747 | /* We know it is safe to progress to 'max_progress' providing | |
3748 | * it is suspended or we are using native metadata. | |
3749 | * Consider extending suspend_point 128M per device if it | |
3750 | * is less than 64M per device beyond reshape_progress. | |
3751 | * But always do a multiple of 'blocks' | |
832b2b9a N |
3752 | * FIXME this is too big - it takes to long to complete |
3753 | * this much. | |
7443ee81 N |
3754 | */ |
3755 | target = 64*1024*2 * min(reshape->before.data_disks, | |
24daa16f | 3756 | reshape->after.data_disks); |
b4f8e38b | 3757 | target /= reshape->backup_blocks; |
7443ee81 N |
3758 | if (target < 2) |
3759 | target = 2; | |
b4f8e38b | 3760 | target *= reshape->backup_blocks; |
7443ee81 N |
3761 | |
3762 | /* For externally managed metadata we always need to suspend IO to | |
3763 | * the area being reshaped so we regularly push suspend_point forward. | |
3764 | * For native metadata we only need the suspend if we are going to do | |
3765 | * a backup. | |
3766 | */ | |
3767 | if (advancing) { | |
d0ab945e N |
3768 | if ((need_backup > info->reshape_progress |
3769 | || info->array.major_version < 0) && | |
7443ee81 | 3770 | *suspend_point < info->reshape_progress + target) { |
d0ab945e N |
3771 | if (need_backup < *suspend_point + 2 * target) |
3772 | *suspend_point = need_backup; | |
3773 | else if (*suspend_point + 2 * target < array_size) | |
7443ee81 | 3774 | *suspend_point += 2 * target; |
d0ab945e N |
3775 | else |
3776 | *suspend_point = array_size; | |
7443ee81 | 3777 | sysfs_set_num(info, NULL, "suspend_hi", *suspend_point); |
d0ab945e N |
3778 | if (max_progress > *suspend_point) |
3779 | max_progress = *suspend_point; | |
7443ee81 N |
3780 | } |
3781 | } else { | |
38dad34a N |
3782 | if (info->array.major_version >= 0) { |
3783 | /* Only need to suspend when about to backup */ | |
3784 | if (info->reshape_progress < need_backup * 2 && | |
3785 | *suspend_point > 0) { | |
d0ab945e | 3786 | *suspend_point = 0; |
38dad34a N |
3787 | sysfs_set_num(info, NULL, "suspend_lo", 0); |
3788 | sysfs_set_num(info, NULL, "suspend_hi", need_backup); | |
3789 | } | |
3790 | } else { | |
3791 | /* Need to suspend continually */ | |
3792 | if (info->reshape_progress < *suspend_point) | |
3793 | *suspend_point = info->reshape_progress; | |
3794 | if (*suspend_point + target < info->reshape_progress) | |
3795 | /* No need to move suspend region yet */; | |
3796 | else { | |
3797 | if (*suspend_point >= 2 * target) | |
3798 | *suspend_point -= 2 * target; | |
3799 | else | |
3800 | *suspend_point = 0; | |
3801 | sysfs_set_num(info, NULL, "suspend_lo", | |
3802 | *suspend_point); | |
3803 | } | |
d0ab945e N |
3804 | if (max_progress < *suspend_point) |
3805 | max_progress = *suspend_point; | |
7443ee81 N |
3806 | } |
3807 | } | |
3808 | ||
3809 | /* now set sync_max to allow that progress. sync_max, like | |
3810 | * sync_completed is a count of sectors written per device, so | |
3811 | * we find the difference between max_progress and the start point, | |
3812 | * and divide that by after.data_disks to get a sync_max | |
3813 | * number. | |
3814 | * At the same time we convert wait_point to a similar number | |
3815 | * for comparing against sync_completed. | |
3816 | */ | |
92d1991f | 3817 | /* scale down max_progress to per_disk */ |
7443ee81 | 3818 | max_progress /= reshape->after.data_disks; |
92d1991f N |
3819 | /* Round to chunk size as some kernels give an erroneously high number */ |
3820 | max_progress /= info->new_chunk/512; | |
3821 | max_progress *= info->new_chunk/512; | |
7f913e9b N |
3822 | /* And round to old chunk size as the kernel wants that */ |
3823 | max_progress /= info->array.chunk_size/512; | |
3824 | max_progress *= info->array.chunk_size/512; | |
92d1991f N |
3825 | /* Limit progress to the whole device */ |
3826 | if (max_progress > info->component_size) | |
3827 | max_progress = info->component_size; | |
7443ee81 | 3828 | wait_point /= reshape->after.data_disks; |
92d1991f N |
3829 | if (!advancing) { |
3830 | /* switch from 'device offset' to 'processed block count' */ | |
3831 | max_progress = info->component_size - max_progress; | |
3832 | wait_point = info->component_size - wait_point; | |
3833 | } | |
7443ee81 | 3834 | |
a6b2d86c N |
3835 | if (!*frozen) |
3836 | sysfs_set_num(info, NULL, "sync_max", max_progress); | |
7443ee81 N |
3837 | |
3838 | /* Now wait. If we have already reached the point that we were | |
3839 | * asked to wait to, don't wait at all, else wait for any change. | |
3840 | * We need to select on 'sync_completed' as that is the place that | |
3841 | * notifications happen, but we are really interested in | |
3842 | * 'reshape_position' | |
3843 | */ | |
3844 | fd = sysfs_get_fd(info, NULL, "sync_completed"); | |
3845 | if (fd < 0) | |
77a73a17 | 3846 | goto check_progress; |
7443ee81 | 3847 | |
621ea11b | 3848 | if (sysfs_fd_get_ll(fd, &completed) < 0) |
77a73a17 | 3849 | goto check_progress; |
621ea11b | 3850 | |
7443ee81 N |
3851 | while (completed < max_progress && completed < wait_point) { |
3852 | /* Check that sync_action is still 'reshape' to avoid | |
3853 | * waiting forever on a dead array | |
3854 | */ | |
3855 | char action[20]; | |
7443ee81 N |
3856 | if (sysfs_get_str(info, NULL, "sync_action", |
3857 | action, 20) <= 0 || | |
3858 | strncmp(action, "reshape", 7) != 0) | |
3859 | break; | |
26d6e157 AK |
3860 | /* Some kernels reset 'sync_completed' to zero |
3861 | * before setting 'sync_action' to 'idle'. | |
3862 | * So we need these extra tests. | |
3863 | */ | |
3864 | if (completed == 0 && advancing | |
3ee556f8 | 3865 | && strncmp(action, "idle", 4) == 0 |
26d6e157 AK |
3866 | && info->reshape_progress > 0) |
3867 | break; | |
3868 | if (completed == 0 && !advancing | |
3ee556f8 | 3869 | && strncmp(action, "idle", 4) == 0 |
26d6e157 AK |
3870 | && info->reshape_progress < (info->component_size |
3871 | * reshape->after.data_disks)) | |
3872 | break; | |
efc67e8e | 3873 | sysfs_wait(fd, NULL); |
621ea11b | 3874 | if (sysfs_fd_get_ll(fd, &completed) < 0) |
77a73a17 | 3875 | goto check_progress; |
7443ee81 | 3876 | } |
10d0d365 | 3877 | /* Some kernels reset 'sync_completed' to zero, |
e0184a0c | 3878 | * we need to have real point we are in md. |
e0cc1c8d | 3879 | * So in that case, read 'reshape_position' from sysfs. |
10d0d365 | 3880 | */ |
e0184a0c | 3881 | if (completed == 0) { |
e0cc1c8d | 3882 | unsigned long long reshapep; |
e0184a0c N |
3883 | char action[20]; |
3884 | if (sysfs_get_str(info, NULL, "sync_action", | |
3885 | action, 20) > 0 && | |
e0cc1c8d N |
3886 | strncmp(action, "idle", 4) == 0 && |
3887 | sysfs_get_ll(info, NULL, | |
3888 | "reshape_position", &reshapep) == 0) | |
3889 | *reshape_completed = reshapep; | |
3890 | } else { | |
3891 | /* some kernels can give an incorrectly high | |
3892 | * 'completed' number, so round down */ | |
3893 | completed /= (info->new_chunk/512); | |
3894 | completed *= (info->new_chunk/512); | |
3895 | /* Convert 'completed' back in to a 'progress' number */ | |
3896 | completed *= reshape->after.data_disks; | |
3897 | if (!advancing) | |
3898 | completed = (info->component_size | |
3899 | * reshape->after.data_disks | |
3900 | - completed); | |
3901 | *reshape_completed = completed; | |
7443ee81 | 3902 | } |
24daa16f | 3903 | |
7443ee81 N |
3904 | close(fd); |
3905 | ||
3906 | /* We return the need_backup flag. Caller will decide | |
d0ab945e | 3907 | * how much - a multiple of ->backup_blocks up to *suspend_point |
7443ee81 | 3908 | */ |
38dad34a N |
3909 | if (advancing) |
3910 | return need_backup > info->reshape_progress; | |
3911 | else | |
3912 | return need_backup >= info->reshape_progress; | |
77a73a17 N |
3913 | |
3914 | check_progress: | |
3915 | /* if we couldn't read a number from sync_completed, then | |
3916 | * either the reshape did complete, or it aborted. | |
3917 | * We can tell which by checking for 'none' in reshape_position. | |
621ea11b N |
3918 | * If it did abort, then it might immediately restart if it |
3919 | * it was just a device failure that leaves us degraded but | |
3920 | * functioning. | |
77a73a17 | 3921 | */ |
77a73a17 | 3922 | if (sysfs_get_str(info, NULL, "reshape_position", buf, sizeof(buf)) < 0 |
621ea11b N |
3923 | || strncmp(buf, "none", 4) != 0) { |
3924 | /* The abort might only be temporary. Wait up to 10 | |
3925 | * seconds for fd to contain a valid number again. | |
3926 | */ | |
efc67e8e | 3927 | int wait = 10000; |
621ea11b | 3928 | int rv = -2; |
a6b2d86c | 3929 | unsigned long long new_sync_max; |
efc67e8e N |
3930 | while (fd >= 0 && rv < 0 && wait > 0) { |
3931 | if (sysfs_wait(fd, &wait) != 1) | |
621ea11b | 3932 | break; |
6560987b N |
3933 | switch (sysfs_fd_get_ll(fd, &completed)) { |
3934 | case 0: | |
621ea11b N |
3935 | /* all good again */ |
3936 | rv = 1; | |
a6b2d86c N |
3937 | /* If "sync_max" is no longer max_progress |
3938 | * we need to freeze things | |
3939 | */ | |
3940 | sysfs_get_ll(info, NULL, "sync_max", &new_sync_max); | |
3941 | *frozen = (new_sync_max != max_progress); | |
6560987b N |
3942 | break; |
3943 | case -2: /* read error - abort */ | |
efc67e8e | 3944 | wait = 0; |
6560987b N |
3945 | break; |
3946 | } | |
621ea11b N |
3947 | } |
3948 | if (fd >= 0) | |
3949 | close(fd); | |
3950 | return rv; /* abort */ | |
3951 | } else { | |
6d5316f6 | 3952 | /* Maybe racing with array shutdown - check state */ |
621ea11b N |
3953 | if (fd >= 0) |
3954 | close(fd); | |
6d5316f6 N |
3955 | if (sysfs_get_str(info, NULL, "array_state", buf, sizeof(buf)) < 0 |
3956 | || strncmp(buf, "inactive", 8) == 0 | |
3957 | || strncmp(buf, "clear",5) == 0) | |
3958 | return -2; /* abort */ | |
77a73a17 | 3959 | return -1; /* complete */ |
6d5316f6 | 3960 | } |
7443ee81 N |
3961 | } |
3962 | ||
fcf57625 | 3963 | /* FIXME return status is never checked */ |
4411fb17 | 3964 | static int grow_backup(struct mdinfo *sra, |
7236ee7a | 3965 | unsigned long long offset, /* per device */ |
7443ee81 | 3966 | unsigned long stripes, /* per device, in old chunks */ |
7236ee7a N |
3967 | int *sources, unsigned long long *offsets, |
3968 | int disks, int chunk, int level, int layout, | |
3969 | int dests, int *destfd, unsigned long long *destoffsets, | |
d4445387 | 3970 | int part, int *degraded, |
7236ee7a N |
3971 | char *buf) |
3972 | { | |
3973 | /* Backup 'blocks' sectors at 'offset' on each device of the array, | |
3974 | * to storage 'destfd' (offset 'destoffsets'), after first | |
3975 | * suspending IO. Then allow resync to continue | |
3976 | * over the suspended section. | |
3977 | * Use part 'part' of the backup-super-block. | |
3978 | */ | |
3979 | int odata = disks; | |
3980 | int rv = 0; | |
3981 | int i; | |
f21e18ca N |
3982 | unsigned long long ll; |
3983 | int new_degraded; | |
7236ee7a N |
3984 | //printf("offset %llu\n", offset); |
3985 | if (level >= 4) | |
3986 | odata--; | |
3987 | if (level == 6) | |
3988 | odata--; | |
7443ee81 | 3989 | |
d4445387 | 3990 | /* Check that array hasn't become degraded, else we might backup the wrong data */ |
2c6ac128 N |
3991 | if (sysfs_get_ll(sra, NULL, "degraded", &ll) < 0) |
3992 | return -1; /* FIXME this error is ignored */ | |
f21e18ca | 3993 | new_degraded = (int)ll; |
d4445387 N |
3994 | if (new_degraded != *degraded) { |
3995 | /* check each device to ensure it is still working */ | |
3996 | struct mdinfo *sd; | |
3997 | for (sd = sra->devs ; sd ; sd = sd->next) { | |
3998 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
3999 | continue; | |
4000 | if (sd->disk.state & (1<<MD_DISK_SYNC)) { | |
4001 | char sbuf[20]; | |
4002 | if (sysfs_get_str(sra, sd, "state", sbuf, 20) < 0 || | |
4003 | strstr(sbuf, "faulty") || | |
4004 | strstr(sbuf, "in_sync") == NULL) { | |
4005 | /* this device is dead */ | |
4006 | sd->disk.state = (1<<MD_DISK_FAULTY); | |
4007 | if (sd->disk.raid_disk >= 0 && | |
4008 | sources[sd->disk.raid_disk] >= 0) { | |
4009 | close(sources[sd->disk.raid_disk]); | |
4010 | sources[sd->disk.raid_disk] = -1; | |
4011 | } | |
4012 | } | |
4013 | } | |
4014 | } | |
4015 | *degraded = new_degraded; | |
4016 | } | |
7236ee7a N |
4017 | if (part) { |
4018 | bsb.arraystart2 = __cpu_to_le64(offset * odata); | |
200871ad | 4019 | bsb.length2 = __cpu_to_le64(stripes * (chunk/512) * odata); |
7236ee7a N |
4020 | } else { |
4021 | bsb.arraystart = __cpu_to_le64(offset * odata); | |
200871ad | 4022 | bsb.length = __cpu_to_le64(stripes * (chunk/512) * odata); |
7236ee7a N |
4023 | } |
4024 | if (part) | |
4025 | bsb.magic[15] = '2'; | |
4026 | for (i = 0; i < dests; i++) | |
4027 | if (part) | |
4028 | lseek64(destfd[i], destoffsets[i] + __le64_to_cpu(bsb.devstart2)*512, 0); | |
4029 | else | |
4030 | lseek64(destfd[i], destoffsets[i], 0); | |
4031 | ||
24daa16f | 4032 | rv = save_stripes(sources, offsets, |
7236ee7a N |
4033 | disks, chunk, level, layout, |
4034 | dests, destfd, | |
4035 | offset*512*odata, stripes * chunk * odata, | |
4036 | buf); | |
4037 | ||
4038 | if (rv) | |
4039 | return rv; | |
97396422 | 4040 | bsb.mtime = __cpu_to_le64(time(0)); |
7236ee7a N |
4041 | for (i = 0; i < dests; i++) { |
4042 | bsb.devstart = __cpu_to_le64(destoffsets[i]/512); | |
4043 | ||
4044 | bsb.sb_csum = bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb)); | |
4045 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0) | |
4046 | bsb.sb_csum2 = bsb_csum((char*)&bsb, | |
4047 | ((char*)&bsb.sb_csum2)-((char*)&bsb)); | |
4048 | ||
72044953 | 4049 | rv = -1; |
f21e18ca N |
4050 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i] - 4096, 0) |
4051 | != destoffsets[i] - 4096) | |
72044953 N |
4052 | break; |
4053 | if (write(destfd[i], &bsb, 512) != 512) | |
4054 | break; | |
ff94fb86 | 4055 | if (destoffsets[i] > 4096) { |
f21e18ca | 4056 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i]+stripes*chunk*odata, 0) != |
a847575a | 4057 | destoffsets[i]+stripes*chunk*odata) |
72044953 N |
4058 | break; |
4059 | if (write(destfd[i], &bsb, 512) != 512) | |
4060 | break; | |
ff94fb86 | 4061 | } |
7236ee7a | 4062 | fsync(destfd[i]); |
72044953 | 4063 | rv = 0; |
7236ee7a | 4064 | } |
2efedc7b | 4065 | |
fcf57625 | 4066 | return rv; |
7236ee7a N |
4067 | } |
4068 | ||
4069 | /* in 2.6.30, the value reported by sync_completed can be | |
4070 | * less that it should be by one stripe. | |
4071 | * This only happens when reshape hits sync_max and pauses. | |
4072 | * So allow wait_backup to either extent sync_max further | |
4073 | * than strictly necessary, or return before the | |
4074 | * sync has got quite as far as we would really like. | |
4075 | * This is what 'blocks2' is for. | |
4076 | * The various caller give appropriate values so that | |
4077 | * every works. | |
4078 | */ | |
fcf57625 | 4079 | /* FIXME return value is often ignored */ |
24daa16f N |
4080 | static int forget_backup(int dests, int *destfd, |
4081 | unsigned long long *destoffsets, | |
4082 | int part) | |
7236ee7a | 4083 | { |
24daa16f | 4084 | /* |
7443ee81 | 4085 | * Erase backup 'part' (which is 0 or 1) |
7236ee7a | 4086 | */ |
7236ee7a | 4087 | int i; |
fcf57625 | 4088 | int rv; |
7236ee7a | 4089 | |
7236ee7a N |
4090 | if (part) { |
4091 | bsb.arraystart2 = __cpu_to_le64(0); | |
4092 | bsb.length2 = __cpu_to_le64(0); | |
4093 | } else { | |
4094 | bsb.arraystart = __cpu_to_le64(0); | |
4095 | bsb.length = __cpu_to_le64(0); | |
4096 | } | |
97396422 | 4097 | bsb.mtime = __cpu_to_le64(time(0)); |
fcf57625 | 4098 | rv = 0; |
7236ee7a N |
4099 | for (i = 0; i < dests; i++) { |
4100 | bsb.devstart = __cpu_to_le64(destoffsets[i]/512); | |
4101 | bsb.sb_csum = bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb)); | |
4102 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0) | |
4103 | bsb.sb_csum2 = bsb_csum((char*)&bsb, | |
4104 | ((char*)&bsb.sb_csum2)-((char*)&bsb)); | |
f21e18ca | 4105 | if ((unsigned long long)lseek64(destfd[i], destoffsets[i]-4096, 0) != |
a847575a | 4106 | destoffsets[i]-4096) |
72044953 | 4107 | rv = -1; |
24daa16f | 4108 | if (rv == 0 && |
72044953 N |
4109 | write(destfd[i], &bsb, 512) != 512) |
4110 | rv = -1; | |
7236ee7a N |
4111 | fsync(destfd[i]); |
4112 | } | |
fcf57625 | 4113 | return rv; |
7236ee7a | 4114 | } |
e86c9dd6 | 4115 | |
7236ee7a N |
4116 | static void fail(char *msg) |
4117 | { | |
fcf57625 | 4118 | int rv; |
72044953 N |
4119 | rv = (write(2, msg, strlen(msg)) != (int)strlen(msg)); |
4120 | rv |= (write(2, "\n", 1) != 1); | |
fcf57625 | 4121 | exit(rv ? 1 : 2); |
7236ee7a N |
4122 | } |
4123 | ||
4124 | static char *abuf, *bbuf; | |
f21e18ca | 4125 | static unsigned long long abuflen; |
7236ee7a N |
4126 | static void validate(int afd, int bfd, unsigned long long offset) |
4127 | { | |
4128 | /* check that the data in the backup against the array. | |
4129 | * This is only used for regression testing and should not | |
4130 | * be used while the array is active | |
4131 | */ | |
7236ee7a N |
4132 | if (afd < 0) |
4133 | return; | |
4134 | lseek64(bfd, offset - 4096, 0); | |
4135 | if (read(bfd, &bsb2, 512) != 512) | |
4136 | fail("cannot read bsb"); | |
4137 | if (bsb2.sb_csum != bsb_csum((char*)&bsb2, | |
4138 | ((char*)&bsb2.sb_csum)-((char*)&bsb2))) | |
4139 | fail("first csum bad"); | |
4140 | if (memcmp(bsb2.magic, "md_backup_data", 14) != 0) | |
4141 | fail("magic is bad"); | |
4142 | if (memcmp(bsb2.magic, "md_backup_data-2", 16) == 0 && | |
4143 | bsb2.sb_csum2 != bsb_csum((char*)&bsb2, | |
24daa16f | 4144 | ((char*)&bsb2.sb_csum2)-((char*)&bsb2))) |
7236ee7a N |
4145 | fail("second csum bad"); |
4146 | ||
4147 | if (__le64_to_cpu(bsb2.devstart)*512 != offset) | |
4148 | fail("devstart is wrong"); | |
4149 | ||
4150 | if (bsb2.length) { | |
4151 | unsigned long long len = __le64_to_cpu(bsb2.length)*512; | |
4152 | ||
4153 | if (abuflen < len) { | |
4154 | free(abuf); | |
4155 | free(bbuf); | |
4156 | abuflen = len; | |
fcf57625 N |
4157 | if (posix_memalign((void**)&abuf, 4096, abuflen) || |
4158 | posix_memalign((void**)&bbuf, 4096, abuflen)) { | |
4159 | abuflen = 0; | |
4160 | /* just stop validating on mem-alloc failure */ | |
4161 | return; | |
4162 | } | |
e86c9dd6 | 4163 | } |
48924014 | 4164 | |
7236ee7a | 4165 | lseek64(bfd, offset, 0); |
f21e18ca | 4166 | if ((unsigned long long)read(bfd, bbuf, len) != len) { |
080fd005 | 4167 | //printf("len %llu\n", len); |
7236ee7a N |
4168 | fail("read first backup failed"); |
4169 | } | |
4170 | lseek64(afd, __le64_to_cpu(bsb2.arraystart)*512, 0); | |
f21e18ca | 4171 | if ((unsigned long long)read(afd, abuf, len) != len) |
7236ee7a N |
4172 | fail("read first from array failed"); |
4173 | if (memcmp(bbuf, abuf, len) != 0) { | |
24daa16f | 4174 | #if 0 |
7236ee7a N |
4175 | int i; |
4176 | printf("offset=%llu len=%llu\n", | |
080fd005 | 4177 | (unsigned long long)__le64_to_cpu(bsb2.arraystart)*512, len); |
7236ee7a N |
4178 | for (i=0; i<len; i++) |
4179 | if (bbuf[i] != abuf[i]) { | |
4180 | printf("first diff byte %d\n", i); | |
93ecfa01 | 4181 | break; |
7236ee7a | 4182 | } |
24daa16f | 4183 | #endif |
7236ee7a | 4184 | fail("data1 compare failed"); |
e86c9dd6 | 4185 | } |
7236ee7a N |
4186 | } |
4187 | if (bsb2.length2) { | |
4188 | unsigned long long len = __le64_to_cpu(bsb2.length2)*512; | |
4189 | ||
4190 | if (abuflen < len) { | |
4191 | free(abuf); | |
4192 | free(bbuf); | |
4193 | abuflen = len; | |
503975b9 N |
4194 | abuf = xmalloc(abuflen); |
4195 | bbuf = xmalloc(abuflen); | |
e86c9dd6 NB |
4196 | } |
4197 | ||
7236ee7a | 4198 | lseek64(bfd, offset+__le64_to_cpu(bsb2.devstart2)*512, 0); |
f21e18ca | 4199 | if ((unsigned long long)read(bfd, bbuf, len) != len) |
7236ee7a N |
4200 | fail("read second backup failed"); |
4201 | lseek64(afd, __le64_to_cpu(bsb2.arraystart2)*512, 0); | |
f21e18ca | 4202 | if ((unsigned long long)read(afd, abuf, len) != len) |
7236ee7a N |
4203 | fail("read second from array failed"); |
4204 | if (memcmp(bbuf, abuf, len) != 0) | |
4205 | fail("data2 compare failed"); | |
e86c9dd6 | 4206 | } |
7236ee7a | 4207 | } |
e86c9dd6 | 4208 | |
999b4972 N |
4209 | int child_monitor(int afd, struct mdinfo *sra, struct reshape *reshape, |
4210 | struct supertype *st, unsigned long blocks, | |
4211 | int *fds, unsigned long long *offsets, | |
4212 | int dests, int *destfd, unsigned long long *destoffsets) | |
7236ee7a | 4213 | { |
7443ee81 N |
4214 | /* Monitor a reshape where backup is being performed using |
4215 | * 'native' mechanism - either to a backup file, or | |
4216 | * to some space in a spare. | |
4217 | */ | |
7236ee7a | 4218 | char *buf; |
7443ee81 N |
4219 | int degraded = -1; |
4220 | unsigned long long speed; | |
4221 | unsigned long long suspend_point, array_size; | |
4222 | unsigned long long backup_point, wait_point; | |
4223 | unsigned long long reshape_completed; | |
4224 | int done = 0; | |
4225 | int increasing = reshape->after.data_disks >= reshape->before.data_disks; | |
4226 | int part = 0; /* The next part of the backup area to fill. It may already | |
4227 | * be full, so we need to check */ | |
4228 | int level = reshape->level; | |
4229 | int layout = reshape->before.layout; | |
4230 | int data = reshape->before.data_disks; | |
4231 | int disks = reshape->before.data_disks + reshape->parity; | |
4232 | int chunk = sra->array.chunk_size; | |
da8100ca N |
4233 | struct mdinfo *sd; |
4234 | unsigned long stripes; | |
3b7e9d0c | 4235 | int uuid[4]; |
a6b2d86c | 4236 | int frozen = 0; |
da8100ca N |
4237 | |
4238 | /* set up the backup-super-block. This requires the | |
4239 | * uuid from the array. | |
4240 | */ | |
4241 | /* Find a superblock */ | |
4242 | for (sd = sra->devs; sd; sd = sd->next) { | |
4243 | char *dn; | |
4244 | int devfd; | |
4245 | int ok; | |
4246 | if (sd->disk.state & (1<<MD_DISK_FAULTY)) | |
4247 | continue; | |
4248 | dn = map_dev(sd->disk.major, sd->disk.minor, 1); | |
4249 | devfd = dev_open(dn, O_RDONLY); | |
4250 | if (devfd < 0) | |
4251 | continue; | |
4252 | ok = st->ss->load_super(st, devfd, NULL); | |
4253 | close(devfd); | |
77f8d358 | 4254 | if (ok == 0) |
da8100ca N |
4255 | break; |
4256 | } | |
4257 | if (!sd) { | |
e7b84f9d | 4258 | pr_err("Cannot find a superblock\n"); |
da8100ca N |
4259 | return 0; |
4260 | } | |
4261 | ||
4262 | memset(&bsb, 0, 512); | |
4263 | memcpy(bsb.magic, "md_backup_data-1", 16); | |
3b7e9d0c LB |
4264 | st->ss->uuid_from_super(st, uuid); |
4265 | memcpy(bsb.set_uuid, uuid, 16); | |
da8100ca N |
4266 | bsb.mtime = __cpu_to_le64(time(0)); |
4267 | bsb.devstart2 = blocks; | |
4268 | ||
4269 | stripes = blocks / (sra->array.chunk_size/512) / | |
4270 | reshape->before.data_disks; | |
e86c9dd6 | 4271 | |
fcf57625 N |
4272 | if (posix_memalign((void**)&buf, 4096, disks * chunk)) |
4273 | /* Don't start the 'reshape' */ | |
4274 | return 0; | |
7443ee81 N |
4275 | if (reshape->before.data_disks == reshape->after.data_disks) { |
4276 | sysfs_get_ll(sra, NULL, "sync_speed_min", &speed); | |
4277 | sysfs_set_num(sra, NULL, "sync_speed_min", 200000); | |
4278 | } | |
e86c9dd6 | 4279 | |
7443ee81 | 4280 | if (increasing) { |
96533072 | 4281 | array_size = sra->component_size * reshape->after.data_disks; |
7443ee81 N |
4282 | backup_point = sra->reshape_progress; |
4283 | suspend_point = 0; | |
4284 | } else { | |
96533072 | 4285 | array_size = sra->component_size * reshape->before.data_disks; |
25da62d9 | 4286 | backup_point = reshape->backup_blocks; |
7443ee81 N |
4287 | suspend_point = array_size; |
4288 | } | |
7236ee7a | 4289 | |
7443ee81 N |
4290 | while (!done) { |
4291 | int rv; | |
7236ee7a | 4292 | |
7443ee81 N |
4293 | /* Want to return as soon the oldest backup slot can |
4294 | * be released as that allows us to start backing up | |
4295 | * some more, providing suspend_point has been | |
b6b95155 | 4296 | * advanced, which it should have. |
7443ee81 N |
4297 | */ |
4298 | if (increasing) { | |
4299 | wait_point = array_size; | |
4300 | if (part == 0 && __le64_to_cpu(bsb.length) > 0) | |
4301 | wait_point = (__le64_to_cpu(bsb.arraystart) + | |
4302 | __le64_to_cpu(bsb.length)); | |
4303 | if (part == 1 && __le64_to_cpu(bsb.length2) > 0) | |
4304 | wait_point = (__le64_to_cpu(bsb.arraystart2) + | |
4305 | __le64_to_cpu(bsb.length2)); | |
4306 | } else { | |
4307 | wait_point = 0; | |
4308 | if (part == 0 && __le64_to_cpu(bsb.length) > 0) | |
4309 | wait_point = __le64_to_cpu(bsb.arraystart); | |
4310 | if (part == 1 && __le64_to_cpu(bsb.length2) > 0) | |
4311 | wait_point = __le64_to_cpu(bsb.arraystart2); | |
4312 | } | |
4313 | ||
737f8574 | 4314 | reshape_completed = sra->reshape_progress; |
7443ee81 N |
4315 | rv = progress_reshape(sra, reshape, |
4316 | backup_point, wait_point, | |
a6b2d86c N |
4317 | &suspend_point, &reshape_completed, |
4318 | &frozen); | |
7443ee81 N |
4319 | /* external metadata would need to ping_monitor here */ |
4320 | sra->reshape_progress = reshape_completed; | |
7236ee7a | 4321 | |
7443ee81 N |
4322 | /* Clear any backup region that is before 'here' */ |
4323 | if (increasing) { | |
b3cf095a N |
4324 | if (__le64_to_cpu(bsb.length) > 0 && |
4325 | reshape_completed >= (__le64_to_cpu(bsb.arraystart) + | |
7443ee81 N |
4326 | __le64_to_cpu(bsb.length))) |
4327 | forget_backup(dests, destfd, | |
4328 | destoffsets, 0); | |
b3cf095a N |
4329 | if (__le64_to_cpu(bsb.length2) > 0 && |
4330 | reshape_completed >= (__le64_to_cpu(bsb.arraystart2) + | |
7443ee81 N |
4331 | __le64_to_cpu(bsb.length2))) |
4332 | forget_backup(dests, destfd, | |
4333 | destoffsets, 1); | |
4334 | } else { | |
b3cf095a N |
4335 | if (__le64_to_cpu(bsb.length) > 0 && |
4336 | reshape_completed <= (__le64_to_cpu(bsb.arraystart))) | |
7443ee81 N |
4337 | forget_backup(dests, destfd, |
4338 | destoffsets, 0); | |
b3cf095a N |
4339 | if (__le64_to_cpu(bsb.length2) > 0 && |
4340 | reshape_completed <= (__le64_to_cpu(bsb.arraystart2))) | |
7443ee81 N |
4341 | forget_backup(dests, destfd, |
4342 | destoffsets, 1); | |
4343 | } | |
84d11e6c N |
4344 | if (sigterm) |
4345 | rv = -2; | |
223c5c99 | 4346 | if (rv < 0) { |
77a73a17 N |
4347 | if (rv == -1) |
4348 | done = 1; | |
223c5c99 N |
4349 | break; |
4350 | } | |
2d4de5f9 N |
4351 | if (rv == 0 && increasing && !st->ss->external) { |
4352 | /* No longer need to monitor this reshape */ | |
2cdd5ce0 | 4353 | sysfs_set_str(sra, NULL, "sync_max", "max"); |
2d4de5f9 N |
4354 | done = 1; |
4355 | break; | |
4356 | } | |
223c5c99 | 4357 | |
60204e4e | 4358 | while (rv) { |
7443ee81 | 4359 | unsigned long long offset; |
e97ca002 | 4360 | unsigned long actual_stripes; |
60204e4e N |
4361 | /* Need to backup some data. |
4362 | * If 'part' is not used and the desired | |
4363 | * backup size is suspended, do a backup, | |
4364 | * then consider the next part. | |
4365 | */ | |
7443ee81 N |
4366 | /* Check that 'part' is unused */ |
4367 | if (part == 0 && __le64_to_cpu(bsb.length) != 0) | |
60204e4e | 4368 | break; |
7443ee81 | 4369 | if (part == 1 && __le64_to_cpu(bsb.length2) != 0) |
60204e4e | 4370 | break; |
7443ee81 N |
4371 | |
4372 | offset = backup_point / data; | |
e97ca002 | 4373 | actual_stripes = stripes; |
60204e4e | 4374 | if (increasing) { |
e97ca002 N |
4375 | if (offset + actual_stripes * (chunk/512) > |
4376 | sra->component_size) | |
4377 | actual_stripes = ((sra->component_size - offset) | |
4378 | / (chunk/512)); | |
4379 | if (offset + actual_stripes * (chunk/512) > | |
60204e4e N |
4380 | suspend_point/data) |
4381 | break; | |
4382 | } else { | |
e97ca002 N |
4383 | if (offset < actual_stripes * (chunk/512)) |
4384 | actual_stripes = offset / (chunk/512); | |
4385 | offset -= actual_stripes * (chunk/512); | |
4386 | if (offset < suspend_point/data) | |
60204e4e N |
4387 | break; |
4388 | } | |
e4b11073 N |
4389 | if (actual_stripes == 0) |
4390 | break; | |
e97ca002 | 4391 | grow_backup(sra, offset, actual_stripes, |
7443ee81 N |
4392 | fds, offsets, |
4393 | disks, chunk, level, layout, | |
4394 | dests, destfd, destoffsets, | |
4395 | part, °raded, buf); | |
4396 | validate(afd, destfd[0], destoffsets[0]); | |
4397 | /* record where 'part' is up to */ | |
4398 | part = !part; | |
4399 | if (increasing) | |
e97ca002 | 4400 | backup_point += actual_stripes * (chunk/512) * data; |
7443ee81 | 4401 | else |
e97ca002 | 4402 | backup_point -= actual_stripes * (chunk/512) * data; |
7443ee81 N |
4403 | } |
4404 | } | |
4405 | ||
223c5c99 | 4406 | /* FIXME maybe call progress_reshape one more time instead */ |
5e7be838 N |
4407 | /* remove any remaining suspension */ |
4408 | sysfs_set_num(sra, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL); | |
4409 | sysfs_set_num(sra, NULL, "suspend_hi", 0); | |
4410 | sysfs_set_num(sra, NULL, "suspend_lo", 0); | |
4411 | sysfs_set_num(sra, NULL, "sync_min", 0); | |
4412 | ||
7443ee81 N |
4413 | if (reshape->before.data_disks == reshape->after.data_disks) |
4414 | sysfs_set_num(sra, NULL, "sync_speed_min", speed); | |
7236ee7a | 4415 | free(buf); |
77a73a17 | 4416 | return done; |
e86c9dd6 | 4417 | } |
353632d9 NB |
4418 | |
4419 | /* | |
4420 | * If any spare contains md_back_data-1 which is recent wrt mtime, | |
4421 | * write that data into the array and update the super blocks with | |
4422 | * the new reshape_progress | |
4423 | */ | |
ea0ebe96 N |
4424 | int Grow_restart(struct supertype *st, struct mdinfo *info, int *fdlist, int cnt, |
4425 | char *backup_file, int verbose) | |
353632d9 NB |
4426 | { |
4427 | int i, j; | |
4428 | int old_disks; | |
353632d9 | 4429 | unsigned long long *offsets; |
82f2d6ab | 4430 | unsigned long long nstripe, ostripe; |
6e9eac4f | 4431 | int ndata, odata; |
353632d9 | 4432 | |
e9e43ec3 N |
4433 | odata = info->array.raid_disks - info->delta_disks - 1; |
4434 | if (info->array.level == 6) odata--; /* number of data disks */ | |
4435 | ndata = info->array.raid_disks - 1; | |
4436 | if (info->new_level == 6) ndata--; | |
353632d9 NB |
4437 | |
4438 | old_disks = info->array.raid_disks - info->delta_disks; | |
4439 | ||
e9e43ec3 N |
4440 | if (info->delta_disks <= 0) |
4441 | /* Didn't grow, so the backup file must have | |
4442 | * been used | |
4443 | */ | |
4444 | old_disks = cnt; | |
06b0d786 | 4445 | for (i=old_disks-(backup_file?1:0); i<cnt; i++) { |
353632d9 | 4446 | struct mdinfo dinfo; |
06b0d786 | 4447 | int fd; |
e9e43ec3 | 4448 | int bsbsize; |
ea0ebe96 | 4449 | char *devname, namebuf[20]; |
10af14c4 | 4450 | unsigned long long lo, hi; |
353632d9 NB |
4451 | |
4452 | /* This was a spare and may have some saved data on it. | |
4453 | * Load the superblock, find and load the | |
4454 | * backup_super_block. | |
4455 | * If either fail, go on to next device. | |
4456 | * If the backup contains no new info, just return | |
206c5eae | 4457 | * else restore data and update all superblocks |
353632d9 | 4458 | */ |
06b0d786 NB |
4459 | if (i == old_disks-1) { |
4460 | fd = open(backup_file, O_RDONLY); | |
e9e43ec3 | 4461 | if (fd<0) { |
e7b84f9d | 4462 | pr_err("backup file %s inaccessible: %s\n", |
e9e43ec3 | 4463 | backup_file, strerror(errno)); |
06b0d786 | 4464 | continue; |
e9e43ec3 | 4465 | } |
ea0ebe96 | 4466 | devname = backup_file; |
06b0d786 NB |
4467 | } else { |
4468 | fd = fdlist[i]; | |
4469 | if (fd < 0) | |
4470 | continue; | |
3da92f27 | 4471 | if (st->ss->load_super(st, fd, NULL)) |
06b0d786 | 4472 | continue; |
353632d9 | 4473 | |
a5d85af7 | 4474 | st->ss->getinfo_super(st, &dinfo, NULL); |
3da92f27 NB |
4475 | st->ss->free_super(st); |
4476 | ||
06b0d786 NB |
4477 | if (lseek64(fd, |
4478 | (dinfo.data_offset + dinfo.component_size - 8) <<9, | |
ea0ebe96 | 4479 | 0) < 0) { |
e7b84f9d | 4480 | pr_err("Cannot seek on device %d\n", i); |
06b0d786 | 4481 | continue; /* Cannot seek */ |
ea0ebe96 N |
4482 | } |
4483 | sprintf(namebuf, "device-%d", i); | |
4484 | devname = namebuf; | |
06b0d786 | 4485 | } |
ea0ebe96 N |
4486 | if (read(fd, &bsb, sizeof(bsb)) != sizeof(bsb)) { |
4487 | if (verbose) | |
e7b84f9d | 4488 | pr_err("Cannot read from %s\n", devname); |
353632d9 | 4489 | continue; /* Cannot read */ |
ea0ebe96 | 4490 | } |
e9e43ec3 | 4491 | if (memcmp(bsb.magic, "md_backup_data-1", 16) != 0 && |
ea0ebe96 N |
4492 | memcmp(bsb.magic, "md_backup_data-2", 16) != 0) { |
4493 | if (verbose) | |
e7b84f9d | 4494 | pr_err("No backup metadata on %s\n", devname); |
353632d9 | 4495 | continue; |
ea0ebe96 N |
4496 | } |
4497 | if (bsb.sb_csum != bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum)-((char*)&bsb))) { | |
4498 | if (verbose) | |
e7b84f9d | 4499 | pr_err("Bad backup-metadata checksum on %s\n", devname); |
353632d9 | 4500 | continue; /* bad checksum */ |
ea0ebe96 | 4501 | } |
e9e43ec3 | 4502 | if (memcmp(bsb.magic, "md_backup_data-2", 16) == 0 && |
ea0ebe96 N |
4503 | bsb.sb_csum2 != bsb_csum((char*)&bsb, ((char*)&bsb.sb_csum2)-((char*)&bsb))) { |
4504 | if (verbose) | |
e7b84f9d | 4505 | pr_err("Bad backup-metadata checksum2 on %s\n", devname); |
22e30516 | 4506 | continue; /* Bad second checksum */ |
ea0ebe96 N |
4507 | } |
4508 | if (memcmp(bsb.set_uuid,info->uuid, 16) != 0) { | |
4509 | if (verbose) | |
e7b84f9d | 4510 | pr_err("Wrong uuid on backup-metadata on %s\n", devname); |
353632d9 | 4511 | continue; /* Wrong uuid */ |
ea0ebe96 | 4512 | } |
353632d9 | 4513 | |
097075b6 N |
4514 | /* array utime and backup-mtime should be updated at much the same time, but it seems that |
4515 | * sometimes they aren't... So allow considerable flexability in matching, and allow | |
4516 | * this test to be overridden by an environment variable. | |
4517 | */ | |
26714713 DD |
4518 | if(time_after(info->array.utime, (unsigned int)__le64_to_cpu(bsb.mtime) + 2*60*60) || |
4519 | time_before(info->array.utime, (unsigned int)__le64_to_cpu(bsb.mtime) - 10*60)) { | |
097075b6 | 4520 | if (check_env("MDADM_GROW_ALLOW_OLD")) { |
7a862a02 | 4521 | pr_err("accepting backup with timestamp %lu for array with timestamp %lu\n", |
097075b6 N |
4522 | (unsigned long)__le64_to_cpu(bsb.mtime), |
4523 | (unsigned long)info->array.utime); | |
4524 | } else { | |
676ab312 N |
4525 | pr_err("too-old timestamp on backup-metadata on %s\n", devname); |
4526 | pr_err("If you think it is should be safe, try 'export MDADM_GROW_ALLOW_OLD=1'\n"); | |
097075b6 N |
4527 | continue; /* time stamp is too bad */ |
4528 | } | |
ea0ebe96 | 4529 | } |
353632d9 | 4530 | |
e9e43ec3 | 4531 | if (bsb.magic[15] == '1') { |
10af14c4 N |
4532 | if (bsb.length == 0) |
4533 | continue; | |
e7a71c6b N |
4534 | if (info->delta_disks >= 0) { |
4535 | /* reshape_progress is increasing */ | |
4536 | if (__le64_to_cpu(bsb.arraystart) | |
4537 | + __le64_to_cpu(bsb.length) | |
4538 | < info->reshape_progress) { | |
4539 | nonew: | |
4540 | if (verbose) | |
e7b84f9d | 4541 | pr_err("backup-metadata found on %s but is not needed\n", devname); |
e7a71c6b N |
4542 | continue; /* No new data here */ |
4543 | } | |
4544 | } else { | |
4545 | /* reshape_progress is decreasing */ | |
4546 | if (__le64_to_cpu(bsb.arraystart) >= | |
4547 | info->reshape_progress) | |
4548 | goto nonew; /* No new data here */ | |
ea0ebe96 | 4549 | } |
e9e43ec3 | 4550 | } else { |
10af14c4 N |
4551 | if (bsb.length == 0 && bsb.length2 == 0) |
4552 | continue; | |
e7a71c6b N |
4553 | if (info->delta_disks >= 0) { |
4554 | /* reshape_progress is increasing */ | |
4555 | if ((__le64_to_cpu(bsb.arraystart) | |
4556 | + __le64_to_cpu(bsb.length) | |
4557 | < info->reshape_progress) | |
4558 | && | |
4559 | (__le64_to_cpu(bsb.arraystart2) | |
4560 | + __le64_to_cpu(bsb.length2) | |
4561 | < info->reshape_progress)) | |
4562 | goto nonew; /* No new data here */ | |
4563 | } else { | |
4564 | /* reshape_progress is decreasing */ | |
4565 | if (__le64_to_cpu(bsb.arraystart) >= | |
4566 | info->reshape_progress && | |
4567 | __le64_to_cpu(bsb.arraystart2) >= | |
4568 | info->reshape_progress) | |
4569 | goto nonew; /* No new data here */ | |
4570 | } | |
e9e43ec3 | 4571 | } |
ea0ebe96 N |
4572 | if (lseek64(fd, __le64_to_cpu(bsb.devstart)*512, 0)< 0) { |
4573 | second_fail: | |
4574 | if (verbose) | |
e7b84f9d N |
4575 | pr_err("Failed to verify secondary backup-metadata block on %s\n", |
4576 | devname); | |
353632d9 | 4577 | continue; /* Cannot seek */ |
ea0ebe96 | 4578 | } |
2efedc7b | 4579 | /* There should be a duplicate backup superblock 4k before here */ |
06b0d786 | 4580 | if (lseek64(fd, -4096, 1) < 0 || |
0155af90 | 4581 | read(fd, &bsb2, sizeof(bsb2)) != sizeof(bsb2)) |
ea0ebe96 | 4582 | goto second_fail; /* Cannot find leading superblock */ |
e9e43ec3 N |
4583 | if (bsb.magic[15] == '1') |
4584 | bsbsize = offsetof(struct mdp_backup_super, pad1); | |
4585 | else | |
4586 | bsbsize = offsetof(struct mdp_backup_super, pad); | |
ff94fb86 | 4587 | if (memcmp(&bsb2, &bsb, bsbsize) != 0) |
ea0ebe96 | 4588 | goto second_fail; /* Cannot find leading superblock */ |
2efedc7b | 4589 | |
353632d9 | 4590 | /* Now need the data offsets for all devices. */ |
503975b9 | 4591 | offsets = xmalloc(sizeof(*offsets)*info->array.raid_disks); |
353632d9 NB |
4592 | for(j=0; j<info->array.raid_disks; j++) { |
4593 | if (fdlist[j] < 0) | |
4594 | continue; | |
3da92f27 | 4595 | if (st->ss->load_super(st, fdlist[j], NULL)) |
353632d9 NB |
4596 | /* FIXME should be this be an error */ |
4597 | continue; | |
a5d85af7 | 4598 | st->ss->getinfo_super(st, &dinfo, NULL); |
3da92f27 | 4599 | st->ss->free_super(st); |
14e5b4d7 | 4600 | offsets[j] = dinfo.data_offset * 512; |
353632d9 | 4601 | } |
d56dd607 | 4602 | printf("%s: restoring critical section\n", Name); |
353632d9 NB |
4603 | |
4604 | if (restore_stripes(fdlist, offsets, | |
4605 | info->array.raid_disks, | |
4606 | info->new_chunk, | |
4607 | info->new_level, | |
4608 | info->new_layout, | |
06b0d786 | 4609 | fd, __le64_to_cpu(bsb.devstart)*512, |
92dcdf7c | 4610 | __le64_to_cpu(bsb.arraystart)*512, |
2fcb75ae | 4611 | __le64_to_cpu(bsb.length)*512, NULL)) { |
e9e43ec3 | 4612 | /* didn't succeed, so giveup */ |
ea0ebe96 | 4613 | if (verbose) |
e7b84f9d | 4614 | pr_err("Error restoring backup from %s\n", |
ea0ebe96 | 4615 | devname); |
730ae51f | 4616 | free(offsets); |
e9e43ec3 N |
4617 | return 1; |
4618 | } | |
24daa16f | 4619 | |
e9e43ec3 N |
4620 | if (bsb.magic[15] == '2' && |
4621 | restore_stripes(fdlist, offsets, | |
4622 | info->array.raid_disks, | |
4623 | info->new_chunk, | |
4624 | info->new_level, | |
4625 | info->new_layout, | |
4626 | fd, __le64_to_cpu(bsb.devstart)*512 + | |
4627 | __le64_to_cpu(bsb.devstart2)*512, | |
92dcdf7c | 4628 | __le64_to_cpu(bsb.arraystart2)*512, |
2fcb75ae | 4629 | __le64_to_cpu(bsb.length2)*512, NULL)) { |
353632d9 | 4630 | /* didn't succeed, so giveup */ |
ea0ebe96 | 4631 | if (verbose) |
e7b84f9d | 4632 | pr_err("Error restoring second backup from %s\n", |
ea0ebe96 | 4633 | devname); |
730ae51f | 4634 | free(offsets); |
2295250a | 4635 | return 1; |
353632d9 NB |
4636 | } |
4637 | ||
730ae51f | 4638 | free(offsets); |
e9e43ec3 | 4639 | |
353632d9 NB |
4640 | /* Ok, so the data is restored. Let's update those superblocks. */ |
4641 | ||
10af14c4 N |
4642 | lo = hi = 0; |
4643 | if (bsb.length) { | |
4644 | lo = __le64_to_cpu(bsb.arraystart); | |
4645 | hi = lo + __le64_to_cpu(bsb.length); | |
4646 | } | |
4647 | if (bsb.magic[15] == '2' && bsb.length2) { | |
4648 | unsigned long long lo1, hi1; | |
4649 | lo1 = __le64_to_cpu(bsb.arraystart2); | |
4650 | hi1 = lo1 + __le64_to_cpu(bsb.length2); | |
4651 | if (lo == hi) { | |
4652 | lo = lo1; | |
4653 | hi = hi1; | |
4654 | } else if (lo < lo1) | |
4655 | hi = hi1; | |
4656 | else | |
4657 | lo = lo1; | |
4658 | } | |
4659 | if (lo < hi && | |
4660 | (info->reshape_progress < lo || | |
4661 | info->reshape_progress > hi)) | |
4662 | /* backup does not affect reshape_progress*/ ; | |
4663 | else if (info->delta_disks >= 0) { | |
e9e43ec3 N |
4664 | info->reshape_progress = __le64_to_cpu(bsb.arraystart) + |
4665 | __le64_to_cpu(bsb.length); | |
4666 | if (bsb.magic[15] == '2') { | |
4667 | unsigned long long p2 = __le64_to_cpu(bsb.arraystart2) + | |
4668 | __le64_to_cpu(bsb.length2); | |
4669 | if (p2 > info->reshape_progress) | |
4670 | info->reshape_progress = p2; | |
4671 | } | |
4672 | } else { | |
4673 | info->reshape_progress = __le64_to_cpu(bsb.arraystart); | |
4674 | if (bsb.magic[15] == '2') { | |
4675 | unsigned long long p2 = __le64_to_cpu(bsb.arraystart2); | |
4676 | if (p2 < info->reshape_progress) | |
4677 | info->reshape_progress = p2; | |
4678 | } | |
4679 | } | |
353632d9 | 4680 | for (j=0; j<info->array.raid_disks; j++) { |
ca3b6696 N |
4681 | if (fdlist[j] < 0) |
4682 | continue; | |
3da92f27 | 4683 | if (st->ss->load_super(st, fdlist[j], NULL)) |
353632d9 | 4684 | continue; |
a5d85af7 | 4685 | st->ss->getinfo_super(st, &dinfo, NULL); |
e9e43ec3 | 4686 | dinfo.reshape_progress = info->reshape_progress; |
3da92f27 | 4687 | st->ss->update_super(st, &dinfo, |
68c7d6d7 NB |
4688 | "_reshape_progress", |
4689 | NULL,0, 0, NULL); | |
3da92f27 NB |
4690 | st->ss->store_super(st, fdlist[j]); |
4691 | st->ss->free_super(st); | |
353632d9 | 4692 | } |
353632d9 NB |
4693 | return 0; |
4694 | } | |
6e9eac4f NB |
4695 | /* Didn't find any backup data, try to see if any |
4696 | * was needed. | |
4697 | */ | |
82f2d6ab N |
4698 | if (info->delta_disks < 0) { |
4699 | /* When shrinking, the critical section is at the end. | |
4700 | * So see if we are before the critical section. | |
4701 | */ | |
4702 | unsigned long long first_block; | |
4703 | nstripe = ostripe = 0; | |
4704 | first_block = 0; | |
4705 | while (ostripe >= nstripe) { | |
4706 | ostripe += info->array.chunk_size / 512; | |
4707 | first_block = ostripe * odata; | |
4708 | nstripe = first_block / ndata / (info->new_chunk/512) * | |
4709 | (info->new_chunk/512); | |
4710 | } | |
4711 | ||
4712 | if (info->reshape_progress >= first_block) | |
4713 | return 0; | |
6e9eac4f | 4714 | } |
82f2d6ab N |
4715 | if (info->delta_disks > 0) { |
4716 | /* See if we are beyond the critical section. */ | |
4717 | unsigned long long last_block; | |
4718 | nstripe = ostripe = 0; | |
4719 | last_block = 0; | |
4720 | while (nstripe >= ostripe) { | |
4721 | nstripe += info->new_chunk / 512; | |
4722 | last_block = nstripe * ndata; | |
4723 | ostripe = last_block / odata / (info->array.chunk_size/512) * | |
4724 | (info->array.chunk_size/512); | |
4725 | } | |
6e9eac4f | 4726 | |
82f2d6ab N |
4727 | if (info->reshape_progress >= last_block) |
4728 | return 0; | |
4729 | } | |
6e9eac4f | 4730 | /* needed to recover critical section! */ |
ea0ebe96 | 4731 | if (verbose) |
e7b84f9d | 4732 | pr_err("Failed to find backup of critical section\n"); |
2295250a | 4733 | return 1; |
353632d9 | 4734 | } |
e9e43ec3 | 4735 | |
2dddadb0 AK |
4736 | int Grow_continue_command(char *devname, int fd, |
4737 | char *backup_file, int verbose) | |
4738 | { | |
4739 | int ret_val = 0; | |
4740 | struct supertype *st = NULL; | |
4741 | struct mdinfo *content = NULL; | |
4742 | struct mdinfo array; | |
4743 | char *subarray = NULL; | |
4744 | struct mdinfo *cc = NULL; | |
4745 | struct mdstat_ent *mdstat = NULL; | |
2dddadb0 AK |
4746 | int cfd = -1; |
4747 | int fd2 = -1; | |
4748 | ||
4749 | dprintf("Grow continue from command line called for %s\n", | |
4750 | devname); | |
4751 | ||
4752 | st = super_by_fd(fd, &subarray); | |
4753 | if (!st || !st->ss) { | |
e7b84f9d N |
4754 | pr_err("Unable to determine metadata format for %s\n", |
4755 | devname); | |
2dddadb0 AK |
4756 | return 1; |
4757 | } | |
4758 | dprintf("Grow continue is run for "); | |
4759 | if (st->ss->external == 0) { | |
e0ab37a3 | 4760 | int d; |
1ade5cc1 | 4761 | dprintf_cont("native array (%s)\n", devname); |
e0ab37a3 | 4762 | if (ioctl(fd, GET_ARRAY_INFO, &array.array) < 0) { |
7a862a02 | 4763 | pr_err("%s is not an active md array - aborting\n", devname); |
2dddadb0 AK |
4764 | ret_val = 1; |
4765 | goto Grow_continue_command_exit; | |
4766 | } | |
4767 | content = &array; | |
e0ab37a3 N |
4768 | /* Need to load a superblock. |
4769 | * FIXME we should really get what we need from | |
4770 | * sysfs | |
4771 | */ | |
4772 | for (d = 0; d < MAX_DISKS; d++) { | |
4773 | mdu_disk_info_t disk; | |
4774 | char *dv; | |
4775 | int err; | |
4776 | disk.number = d; | |
4777 | if (ioctl(fd, GET_DISK_INFO, &disk) < 0) | |
4778 | continue; | |
4779 | if (disk.major == 0 && disk.minor == 0) | |
4780 | continue; | |
4781 | if ((disk.state & (1 << MD_DISK_ACTIVE)) == 0) | |
4782 | continue; | |
4783 | dv = map_dev(disk.major, disk.minor, 1); | |
4784 | if (!dv) | |
4785 | continue; | |
4786 | fd2 = dev_open(dv, O_RDONLY); | |
4787 | if (fd2 < 0) | |
4788 | continue; | |
4789 | err = st->ss->load_super(st, fd2, NULL); | |
4790 | close(fd2); | |
364a48c9 JS |
4791 | /* invalidate fd2 to avoid possible double close() */ |
4792 | fd2 = -1; | |
e0ab37a3 N |
4793 | if (err) |
4794 | continue; | |
4795 | break; | |
4796 | } | |
4797 | if (d == MAX_DISKS) { | |
4798 | pr_err("Unable to load metadata for %s\n", | |
4799 | devname); | |
4800 | ret_val = 1; | |
4801 | goto Grow_continue_command_exit; | |
4802 | } | |
4803 | st->ss->getinfo_super(st, content, NULL); | |
2dddadb0 | 4804 | } else { |
4dd2df09 | 4805 | char *container; |
2dddadb0 AK |
4806 | |
4807 | if (subarray) { | |
1ade5cc1 | 4808 | dprintf_cont("subarray (%s)\n", subarray); |
4dd2df09 N |
4809 | container = st->container_devnm; |
4810 | cfd = open_dev_excl(st->container_devnm); | |
2dddadb0 | 4811 | } else { |
4dd2df09 | 4812 | container = st->devnm; |
2dddadb0 | 4813 | close(fd); |
4dd2df09 | 4814 | cfd = open_dev_excl(st->devnm); |
1ade5cc1 | 4815 | dprintf_cont("container (%s)\n", container); |
2dddadb0 AK |
4816 | fd = cfd; |
4817 | } | |
4818 | if (cfd < 0) { | |
7a862a02 | 4819 | pr_err("Unable to open container for %s\n", devname); |
2dddadb0 AK |
4820 | ret_val = 1; |
4821 | goto Grow_continue_command_exit; | |
4822 | } | |
2dddadb0 AK |
4823 | |
4824 | /* find in container array under reshape | |
4825 | */ | |
4826 | ret_val = st->ss->load_container(st, cfd, NULL); | |
4827 | if (ret_val) { | |
e7b84f9d N |
4828 | pr_err("Cannot read superblock for %s\n", |
4829 | devname); | |
2dddadb0 AK |
4830 | ret_val = 1; |
4831 | goto Grow_continue_command_exit; | |
4832 | } | |
4833 | ||
446894ea | 4834 | cc = st->ss->container_content(st, subarray); |
2dddadb0 AK |
4835 | for (content = cc; content ; content = content->next) { |
4836 | char *array; | |
446894ea | 4837 | int allow_reshape = 1; |
2dddadb0 AK |
4838 | |
4839 | if (content->reshape_active == 0) | |
4840 | continue; | |
81219e70 LM |
4841 | /* The decision about array or container wide |
4842 | * reshape is taken in Grow_continue based | |
4843 | * content->reshape_active state, therefore we | |
4844 | * need to check_reshape based on | |
4845 | * reshape_active and subarray name | |
446894ea N |
4846 | */ |
4847 | if (content->array.state & (1<<MD_SB_BLOCK_VOLUME)) | |
4848 | allow_reshape = 0; | |
4849 | if (content->reshape_active == CONTAINER_RESHAPE && | |
4850 | (content->array.state | |
4851 | & (1<<MD_SB_BLOCK_CONTAINER_RESHAPE))) | |
4852 | allow_reshape = 0; | |
4853 | ||
81219e70 | 4854 | if (!allow_reshape) { |
7a862a02 | 4855 | pr_err("cannot continue reshape of an array in container with unsupported metadata: %s(%s)\n", |
4dd2df09 | 4856 | devname, container); |
81219e70 LM |
4857 | ret_val = 1; |
4858 | goto Grow_continue_command_exit; | |
4859 | } | |
2dddadb0 AK |
4860 | |
4861 | array = strchr(content->text_version+1, '/')+1; | |
4dd2df09 | 4862 | mdstat = mdstat_by_subdev(array, container); |
2dddadb0 AK |
4863 | if (!mdstat) |
4864 | continue; | |
1ca90aa6 | 4865 | if (mdstat->active == 0) { |
4dd2df09 N |
4866 | pr_err("Skipping inactive array %s.\n", |
4867 | mdstat->devnm); | |
1ca90aa6 AK |
4868 | free_mdstat(mdstat); |
4869 | mdstat = NULL; | |
4870 | continue; | |
4871 | } | |
2dddadb0 AK |
4872 | break; |
4873 | } | |
4874 | if (!content) { | |
7a862a02 | 4875 | pr_err("Unable to determine reshaped array for %s\n", devname); |
2dddadb0 AK |
4876 | ret_val = 1; |
4877 | goto Grow_continue_command_exit; | |
4878 | } | |
4dd2df09 | 4879 | fd2 = open_dev(mdstat->devnm); |
2dddadb0 | 4880 | if (fd2 < 0) { |
4dd2df09 | 4881 | pr_err("cannot open (%s)\n", mdstat->devnm); |
2dddadb0 AK |
4882 | ret_val = 1; |
4883 | goto Grow_continue_command_exit; | |
4884 | } | |
4885 | ||
4dd2df09 | 4886 | sysfs_init(content, fd2, mdstat->devnm); |
2dddadb0 | 4887 | |
10df72a0 AP |
4888 | close(fd2); |
4889 | fd2 = -1; | |
4890 | ||
2dddadb0 AK |
4891 | /* start mdmon in case it is not running |
4892 | */ | |
4dd2df09 N |
4893 | if (!mdmon_running(container)) |
4894 | start_mdmon(container); | |
4895 | ping_monitor(container); | |
2dddadb0 | 4896 | |
4dd2df09 | 4897 | if (mdmon_running(container)) |
2dddadb0 AK |
4898 | st->update_tail = &st->updates; |
4899 | else { | |
7a862a02 | 4900 | pr_err("No mdmon found. Grow cannot continue.\n"); |
2dddadb0 AK |
4901 | ret_val = 1; |
4902 | goto Grow_continue_command_exit; | |
4903 | } | |
4904 | } | |
4905 | ||
f1fe496b AK |
4906 | /* verify that array under reshape is started from |
4907 | * correct position | |
4908 | */ | |
e0ab37a3 | 4909 | if (verify_reshape_position(content, content->array.level) < 0) { |
f1fe496b AK |
4910 | ret_val = 1; |
4911 | goto Grow_continue_command_exit; | |
4912 | } | |
4913 | ||
2dddadb0 AK |
4914 | /* continue reshape |
4915 | */ | |
06e293d0 | 4916 | ret_val = Grow_continue(fd, st, content, backup_file, 1, 0); |
2dddadb0 AK |
4917 | |
4918 | Grow_continue_command_exit: | |
4919 | if (fd2 > -1) | |
4920 | close(fd2); | |
4921 | if (cfd > -1) | |
4922 | close(cfd); | |
4923 | st->ss->free_super(st); | |
4924 | free_mdstat(mdstat); | |
4925 | sysfs_free(cc); | |
4926 | free(subarray); | |
4927 | ||
4928 | return ret_val; | |
4929 | } | |
4930 | ||
e9e43ec3 | 4931 | int Grow_continue(int mdfd, struct supertype *st, struct mdinfo *info, |
06e293d0 | 4932 | char *backup_file, int forked, int freeze_reshape) |
e9e43ec3 | 4933 | { |
3bd58dc6 AK |
4934 | int ret_val = 2; |
4935 | ||
4936 | if (!info->reshape_active) | |
4937 | return ret_val; | |
864a004f | 4938 | |
20a40eca | 4939 | if (st->ss->external) { |
4dd2df09 | 4940 | int cfd = open_dev(st->container_devnm); |
3db2fdd8 | 4941 | |
3bd58dc6 AK |
4942 | if (cfd < 0) |
4943 | return 1; | |
f362d22b | 4944 | |
4dd2df09 | 4945 | st->ss->load_container(st, cfd, st->container_devnm); |
3bd58dc6 | 4946 | close(cfd); |
4dd2df09 | 4947 | ret_val = reshape_container(st->container_devnm, NULL, mdfd, |
3bd58dc6 | 4948 | st, info, 0, backup_file, |
054cba77 | 4949 | 0, forked, |
8ecf12b9 N |
4950 | 1 | info->reshape_active, |
4951 | freeze_reshape); | |
3bd58dc6 AK |
4952 | } else |
4953 | ret_val = reshape_array(NULL, mdfd, "array", st, info, 1, | |
ca36d707 | 4954 | NULL, INVALID_SECTORS, |
06e293d0 | 4955 | backup_file, 0, forked, |
8ecf12b9 | 4956 | 1 | info->reshape_active, |
3bd58dc6 | 4957 | freeze_reshape); |
f362d22b | 4958 | |
3bd58dc6 | 4959 | return ret_val; |
e9e43ec3 | 4960 | } |
54ded86f N |
4961 | |
4962 | char *make_backup(char *name) | |
4963 | { | |
4964 | char *base = "backup_file-"; | |
4965 | int len; | |
4966 | char *fname; | |
4967 | ||
4968 | len = strlen(MAP_DIR) + 1 + strlen(base) + strlen(name)+1; | |
4969 | fname = xmalloc(len); | |
4970 | sprintf(fname, "%s/%s%s", MAP_DIR, base, name); | |
4971 | return fname; | |
4972 | } | |
4973 | ||
4974 | char *locate_backup(char *name) | |
4975 | { | |
4976 | char *fl = make_backup(name); | |
4977 | struct stat stb; | |
4978 | ||
4979 | if (stat(fl, &stb) == 0 && | |
4980 | S_ISREG(stb.st_mode)) | |
4981 | return fl; | |
4982 | ||
4983 | free(fl); | |
4984 | return NULL; | |
4985 | } |