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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2016 Neil Brown <neilb@suse.com> | |
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 | |
22 | * Email: <neilb@suse.de> | |
23 | */ | |
24 | ||
25 | #include <stddef.h> | |
26 | #include "mdadm.h" | |
27 | /* | |
28 | * The version-1 superblock : | |
29 | * All numeric fields are little-endian. | |
30 | * | |
31 | * total size: 256 bytes plus 2 per device. | |
32 | * 1K allows 384 devices. | |
33 | */ | |
34 | struct mdp_superblock_1 { | |
35 | /* constant array information - 128 bytes */ | |
36 | __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */ | |
37 | __u32 major_version; /* 1 */ | |
38 | __u32 feature_map; /* 0 for now */ | |
39 | __u32 pad0; /* always set to 0 when writing */ | |
40 | ||
41 | __u8 set_uuid[16]; /* user-space generated. */ | |
42 | char set_name[32]; /* set and interpreted by user-space */ | |
43 | ||
44 | __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/ | |
45 | __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */ | |
46 | __u32 layout; /* used for raid5, raid6, raid10, and raid0 */ | |
47 | __u64 size; /* used size of component devices, in 512byte sectors */ | |
48 | ||
49 | __u32 chunksize; /* in 512byte sectors */ | |
50 | __u32 raid_disks; | |
51 | union { | |
52 | __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts | |
53 | * NOTE: signed, so bitmap can be before superblock | |
54 | * only meaningful of feature_map[0] is set. | |
55 | */ | |
56 | ||
57 | /* only meaningful when feature_map[MD_FEATURE_PPL] is set */ | |
58 | struct { | |
59 | __s16 offset; /* sectors from start of superblock that ppl starts */ | |
60 | __u16 size; /* ppl size in sectors */ | |
61 | } ppl; | |
62 | }; | |
63 | ||
64 | /* These are only valid with feature bit '4' */ | |
65 | __u32 new_level; /* new level we are reshaping to */ | |
66 | __u64 reshape_position; /* next address in array-space for reshape */ | |
67 | __u32 delta_disks; /* change in number of raid_disks */ | |
68 | __u32 new_layout; /* new layout */ | |
69 | __u32 new_chunk; /* new chunk size (sectors) */ | |
70 | __u32 new_offset; /* signed number to add to data_offset in new | |
71 | * layout. 0 == no-change. This can be | |
72 | * different on each device in the array. | |
73 | */ | |
74 | ||
75 | /* constant this-device information - 64 bytes */ | |
76 | __u64 data_offset; /* sector start of data, often 0 */ | |
77 | __u64 data_size; /* sectors in this device that can be used for data */ | |
78 | __u64 super_offset; /* sector start of this superblock */ | |
79 | union { | |
80 | __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */ | |
81 | __u64 journal_tail;/* journal tail of journal device (from data_offset) */ | |
82 | }; | |
83 | __u32 dev_number; /* permanent identifier of this device - not role in raid */ | |
84 | __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */ | |
85 | __u8 device_uuid[16]; /* user-space setable, ignored by kernel */ | |
86 | __u8 devflags; /* per-device flags. Only one defined...*/ | |
87 | #define WriteMostly1 1 /* mask for writemostly flag in above */ | |
88 | #define FailFast1 2 /* Device should get FailFast requests */ | |
89 | /* bad block log. If there are any bad blocks the feature flag is set. | |
90 | * if offset and size are non-zero, that space is reserved and available. | |
91 | */ | |
92 | __u8 bblog_shift; /* shift from sectors to block size for badblock list */ | |
93 | __u16 bblog_size; /* number of sectors reserved for badblock list */ | |
94 | __u32 bblog_offset; /* sector offset from superblock to bblog, signed */ | |
95 | ||
96 | /* array state information - 64 bytes */ | |
97 | __u64 utime; /* 40 bits second, 24 bits microseconds */ | |
98 | __u64 events; /* incremented when superblock updated */ | |
99 | __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */ | |
100 | __u32 sb_csum; /* checksum upto dev_roles[max_dev] */ | |
101 | __u32 max_dev; /* size of dev_roles[] array to consider */ | |
102 | __u8 pad3[64-32]; /* set to 0 when writing */ | |
103 | ||
104 | /* device state information. Indexed by dev_number. | |
105 | * 2 bytes per device | |
106 | * Note there are no per-device state flags. State information is rolled | |
107 | * into the 'roles' value. If a device is spare or faulty, then it doesn't | |
108 | * have a meaningful role. | |
109 | */ | |
110 | __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ | |
111 | }; | |
112 | ||
113 | #define MAX_SB_SIZE 4096 | |
114 | /* bitmap super size is 256, but we round up to a sector for alignment */ | |
115 | #define BM_SUPER_SIZE 512 | |
116 | #define MAX_DEVS ((int)(MAX_SB_SIZE - sizeof(struct mdp_superblock_1)) / 2) | |
117 | #define SUPER1_SIZE (MAX_SB_SIZE + BM_SUPER_SIZE \ | |
118 | + sizeof(struct misc_dev_info)) | |
119 | ||
120 | struct misc_dev_info { | |
121 | __u64 device_size; | |
122 | }; | |
123 | ||
124 | #define MULTIPLE_PPL_AREA_SIZE_SUPER1 (1024 * 1024) /* Size of the whole | |
125 | * mutliple PPL area | |
126 | */ | |
127 | /* feature_map bits */ | |
128 | #define MD_FEATURE_BITMAP_OFFSET 1 | |
129 | #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and | |
130 | * must be honoured | |
131 | */ | |
132 | #define MD_FEATURE_RESHAPE_ACTIVE 4 | |
133 | #define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */ | |
134 | #define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an | |
135 | * active device with same 'role'. | |
136 | * 'recovery_offset' is also set. | |
137 | */ | |
138 | #define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number | |
139 | * of devices, but is going | |
140 | * backwards anyway. | |
141 | */ | |
142 | #define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */ | |
143 | #define MD_FEATURE_BITMAP_VERSIONED 256 /* bitmap version number checked properly */ | |
144 | #define MD_FEATURE_JOURNAL 512 /* support write journal */ | |
145 | #define MD_FEATURE_PPL 1024 /* support PPL */ | |
146 | #define MD_FEATURE_MUTLIPLE_PPLS 2048 /* support for multiple PPLs */ | |
147 | #define MD_FEATURE_RAID0_LAYOUT 4096 /* layout is meaningful in RAID0 */ | |
148 | #define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \ | |
149 | |MD_FEATURE_RECOVERY_OFFSET \ | |
150 | |MD_FEATURE_RESHAPE_ACTIVE \ | |
151 | |MD_FEATURE_BAD_BLOCKS \ | |
152 | |MD_FEATURE_REPLACEMENT \ | |
153 | |MD_FEATURE_RESHAPE_BACKWARDS \ | |
154 | |MD_FEATURE_NEW_OFFSET \ | |
155 | |MD_FEATURE_BITMAP_VERSIONED \ | |
156 | |MD_FEATURE_JOURNAL \ | |
157 | |MD_FEATURE_PPL \ | |
158 | |MD_FEATURE_MULTIPLE_PPLS \ | |
159 | |MD_FEATURE_RAID0_LAYOUT \ | |
160 | ) | |
161 | ||
162 | static int role_from_sb(struct mdp_superblock_1 *sb) | |
163 | { | |
164 | unsigned int d; | |
165 | int role; | |
166 | ||
167 | d = __le32_to_cpu(sb->dev_number); | |
168 | if (d < __le32_to_cpu(sb->max_dev)) | |
169 | role = __le16_to_cpu(sb->dev_roles[d]); | |
170 | else | |
171 | role = MD_DISK_ROLE_SPARE; | |
172 | return role; | |
173 | } | |
174 | ||
175 | /* return how many bytes are needed for bitmap, for cluster-md each node | |
176 | * should have it's own bitmap */ | |
177 | static unsigned int calc_bitmap_size(bitmap_super_t *bms, unsigned int boundary) | |
178 | { | |
179 | unsigned long long bits, bytes; | |
180 | ||
181 | bits = bitmap_bits(__le64_to_cpu(bms->sync_size), | |
182 | __le32_to_cpu(bms->chunksize)); | |
183 | bytes = (bits+7) >> 3; | |
184 | bytes += sizeof(bitmap_super_t); | |
185 | bytes = ROUND_UP(bytes, boundary); | |
186 | ||
187 | return bytes; | |
188 | } | |
189 | ||
190 | static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb) | |
191 | { | |
192 | unsigned int disk_csum, csum; | |
193 | unsigned long long newcsum; | |
194 | int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2; | |
195 | unsigned int *isuper = (unsigned int*)sb; | |
196 | ||
197 | /* make sure I can count... */ | |
198 | if (offsetof(struct mdp_superblock_1,data_offset) != 128 || | |
199 | offsetof(struct mdp_superblock_1, utime) != 192 || | |
200 | sizeof(struct mdp_superblock_1) != 256) { | |
201 | fprintf(stderr, "WARNING - superblock isn't sized correctly\n"); | |
202 | } | |
203 | ||
204 | disk_csum = sb->sb_csum; | |
205 | sb->sb_csum = 0; | |
206 | newcsum = 0; | |
207 | for (; size>=4; size -= 4 ) { | |
208 | newcsum += __le32_to_cpu(*isuper); | |
209 | isuper++; | |
210 | } | |
211 | ||
212 | if (size == 2) | |
213 | newcsum += __le16_to_cpu(*(unsigned short*) isuper); | |
214 | ||
215 | csum = (newcsum & 0xffffffff) + (newcsum >> 32); | |
216 | sb->sb_csum = disk_csum; | |
217 | return __cpu_to_le32(csum); | |
218 | } | |
219 | ||
220 | /* | |
221 | * Information related to file descriptor used for aligned reads/writes. | |
222 | * Cache the block size. | |
223 | */ | |
224 | struct align_fd { | |
225 | int fd; | |
226 | int blk_sz; | |
227 | }; | |
228 | ||
229 | static void init_afd(struct align_fd *afd, int fd) | |
230 | { | |
231 | afd->fd = fd; | |
232 | if (!get_dev_sector_size(afd->fd, NULL, (unsigned int *)&afd->blk_sz)) | |
233 | afd->blk_sz = 512; | |
234 | } | |
235 | ||
236 | static char abuf[4096+4096]; | |
237 | ||
238 | static int aread(struct align_fd *afd, void *buf, int len) | |
239 | { | |
240 | /* aligned read. | |
241 | * On devices with a 4K sector size, we need to read | |
242 | * the full sector and copy relevant bits into | |
243 | * the buffer | |
244 | */ | |
245 | int bsize, iosize; | |
246 | char *b; | |
247 | int n; | |
248 | ||
249 | bsize = afd->blk_sz; | |
250 | ||
251 | if (!bsize || bsize > 4096 || len > 4096) { | |
252 | if (!bsize) | |
253 | fprintf(stderr, "WARNING - aread() called with invalid block size\n"); | |
254 | return -1; | |
255 | } | |
256 | b = ROUND_UP_PTR((char *)abuf, 4096); | |
257 | ||
258 | for (iosize = 0; iosize < len; iosize += bsize) | |
259 | ; | |
260 | n = read(afd->fd, b, iosize); | |
261 | if (n <= 0) | |
262 | return n; | |
263 | lseek(afd->fd, len - n, 1); | |
264 | if (n > len) | |
265 | n = len; | |
266 | memcpy(buf, b, n); | |
267 | return n; | |
268 | } | |
269 | ||
270 | static int awrite(struct align_fd *afd, void *buf, int len) | |
271 | { | |
272 | /* aligned write. | |
273 | * On devices with a 4K sector size, we need to write | |
274 | * the full sector. We pre-read if the sector is larger | |
275 | * than the write. | |
276 | * The address must be sector-aligned. | |
277 | */ | |
278 | int bsize, iosize; | |
279 | char *b; | |
280 | int n; | |
281 | ||
282 | bsize = afd->blk_sz; | |
283 | if (!bsize || bsize > 4096 || len > 4096) { | |
284 | if (!bsize) | |
285 | fprintf(stderr, "WARNING - awrite() called with invalid block size\n"); | |
286 | return -1; | |
287 | } | |
288 | b = ROUND_UP_PTR((char *)abuf, 4096); | |
289 | ||
290 | for (iosize = 0; iosize < len ; iosize += bsize) | |
291 | ; | |
292 | ||
293 | if (len != iosize) { | |
294 | n = read(afd->fd, b, iosize); | |
295 | if (n <= 0) | |
296 | return n; | |
297 | lseek(afd->fd, -n, 1); | |
298 | } | |
299 | ||
300 | memcpy(b, buf, len); | |
301 | n = write(afd->fd, b, iosize); | |
302 | if (n <= 0) | |
303 | return n; | |
304 | lseek(afd->fd, len - n, 1); | |
305 | return len; | |
306 | } | |
307 | ||
308 | static inline unsigned int md_feature_any_ppl_on(__u32 feature_map) | |
309 | { | |
310 | return ((__cpu_to_le32(feature_map) & | |
311 | (MD_FEATURE_PPL | MD_FEATURE_MUTLIPLE_PPLS))); | |
312 | } | |
313 | ||
314 | static inline unsigned int choose_ppl_space(int chunk) | |
315 | { | |
316 | return (PPL_HEADER_SIZE >> 9) + (chunk > 128*2 ? chunk : 128*2); | |
317 | } | |
318 | ||
319 | static void examine_super1(struct supertype *st, char *homehost) | |
320 | { | |
321 | struct mdp_superblock_1 *sb = st->sb; | |
322 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE); | |
323 | time_t atime; | |
324 | unsigned int d; | |
325 | int role; | |
326 | int delta_extra = 0; | |
327 | int i; | |
328 | char *c; | |
329 | int l = homehost ? strlen(homehost) : 0; | |
330 | int layout; | |
331 | unsigned long long sb_offset; | |
332 | struct mdinfo info; | |
333 | ||
334 | printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); | |
335 | printf(" Version : 1"); | |
336 | sb_offset = __le64_to_cpu(sb->super_offset); | |
337 | if (sb_offset <= 4) | |
338 | printf(".1\n"); | |
339 | else if (sb_offset <= 8) | |
340 | printf(".2\n"); | |
341 | else | |
342 | printf(".0\n"); | |
343 | printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); | |
344 | printf(" Array UUID : "); | |
345 | for (i=0; i<16; i++) { | |
346 | if ((i&3)==0 && i != 0) printf(":"); | |
347 | printf("%02x", sb->set_uuid[i]); | |
348 | } | |
349 | printf("\n"); | |
350 | printf(" Name : %.32s", sb->set_name); | |
351 | if (l > 0 && l < 32 && | |
352 | sb->set_name[l] == ':' && | |
353 | strncmp(sb->set_name, homehost, l) == 0) | |
354 | printf(" (local to host %s)", homehost); | |
355 | printf("\n"); | |
356 | if (bms->nodes > 0 && | |
357 | (__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) | |
358 | printf(" Cluster Name : %-64s\n", bms->cluster_name); | |
359 | atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; | |
360 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
361 | c=map_num(pers, __le32_to_cpu(sb->level)); | |
362 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
363 | printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); | |
364 | printf("\n"); | |
365 | printf(" Avail Dev Size : %llu sectors%s\n", | |
366 | (unsigned long long)__le64_to_cpu(sb->data_size), | |
367 | human_size(__le64_to_cpu(sb->data_size)<<9)); | |
368 | if (__le32_to_cpu(sb->level) > 0) { | |
369 | int ddsks = 0, ddsks_denom = 1; | |
370 | switch(__le32_to_cpu(sb->level)) { | |
371 | case 1: ddsks=1;break; | |
372 | case 4: | |
373 | case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break; | |
374 | case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break; | |
375 | case 10: | |
376 | layout = __le32_to_cpu(sb->layout); | |
377 | ddsks = __le32_to_cpu(sb->raid_disks); | |
378 | ddsks_denom = (layout&255) * ((layout>>8)&255); | |
379 | } | |
380 | if (ddsks) { | |
381 | long long asize = __le64_to_cpu(sb->size); | |
382 | asize = (asize << 9) * ddsks / ddsks_denom; | |
383 | printf(" Array Size : %llu KiB%s\n", | |
384 | asize >> 10, human_size(asize)); | |
385 | } | |
386 | if (sb->size != sb->data_size) | |
387 | printf(" Used Dev Size : %llu sectors%s\n", | |
388 | (unsigned long long)__le64_to_cpu(sb->size), | |
389 | human_size(__le64_to_cpu(sb->size)<<9)); | |
390 | } | |
391 | if (sb->data_offset) | |
392 | printf(" Data Offset : %llu sectors\n", | |
393 | (unsigned long long)__le64_to_cpu(sb->data_offset)); | |
394 | if (sb->new_offset && | |
395 | (__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) { | |
396 | unsigned long long offset = __le64_to_cpu(sb->data_offset); | |
397 | offset += (signed)(int32_t)__le32_to_cpu(sb->new_offset); | |
398 | printf(" New Offset : %llu sectors\n", offset); | |
399 | } | |
400 | printf(" Super Offset : %llu sectors\n", | |
401 | (unsigned long long)__le64_to_cpu(sb->super_offset)); | |
402 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) | |
403 | printf("Recovery Offset : %llu sectors\n", | |
404 | (unsigned long long)__le64_to_cpu(sb->recovery_offset)); | |
405 | ||
406 | st->ss->getinfo_super(st, &info, NULL); | |
407 | if (info.space_after != 1 && | |
408 | !(__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) | |
409 | printf(" Unused Space : before=%llu sectors, after=%llu sectors\n", | |
410 | info.space_before, info.space_after); | |
411 | ||
412 | printf(" State : %s\n", | |
413 | (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); | |
414 | printf(" Device UUID : "); | |
415 | for (i=0; i<16; i++) { | |
416 | if ((i&3)==0 && i != 0) | |
417 | printf(":"); | |
418 | printf("%02x", sb->device_uuid[i]); | |
419 | } | |
420 | printf("\n"); | |
421 | printf("\n"); | |
422 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
423 | printf("Internal Bitmap : %ld sectors from superblock\n", | |
424 | (long)(int32_t)__le32_to_cpu(sb->bitmap_offset)); | |
425 | } else if (md_feature_any_ppl_on(sb->feature_map)) { | |
426 | printf(" PPL : %u sectors at offset %d sectors from superblock\n", | |
427 | __le16_to_cpu(sb->ppl.size), | |
428 | __le16_to_cpu(sb->ppl.offset)); | |
429 | } | |
430 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE)) { | |
431 | printf(" Reshape pos'n : %llu%s\n", (unsigned long long) | |
432 | __le64_to_cpu(sb->reshape_position)/2, | |
433 | human_size(__le64_to_cpu(sb->reshape_position)<<9)); | |
434 | if (__le32_to_cpu(sb->delta_disks)) { | |
435 | printf(" Delta Devices : %d", | |
436 | __le32_to_cpu(sb->delta_disks)); | |
437 | printf(" (%d->%d)\n", | |
438 | __le32_to_cpu(sb->raid_disks) - | |
439 | __le32_to_cpu(sb->delta_disks), | |
440 | __le32_to_cpu(sb->raid_disks)); | |
441 | if ((int)__le32_to_cpu(sb->delta_disks) < 0) | |
442 | delta_extra = -__le32_to_cpu(sb->delta_disks); | |
443 | } | |
444 | if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { | |
445 | c = map_num(pers, __le32_to_cpu(sb->new_level)); | |
446 | printf(" New Level : %s\n", c?c:"-unknown-"); | |
447 | } | |
448 | if (__le32_to_cpu(sb->new_layout) != | |
449 | __le32_to_cpu(sb->layout)) { | |
450 | if (__le32_to_cpu(sb->level) == 5) { | |
451 | c = map_num(r5layout, | |
452 | __le32_to_cpu(sb->new_layout)); | |
453 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
454 | } | |
455 | if (__le32_to_cpu(sb->level) == 6) { | |
456 | c = map_num(r6layout, | |
457 | __le32_to_cpu(sb->new_layout)); | |
458 | printf(" New Layout : %s\n", c?c:"-unknown-"); | |
459 | } | |
460 | if (__le32_to_cpu(sb->level) == 10) { | |
461 | printf(" New Layout :"); | |
462 | print_r10_layout(__le32_to_cpu(sb->new_layout)); | |
463 | printf("\n"); | |
464 | } | |
465 | } | |
466 | if (__le32_to_cpu(sb->new_chunk) != | |
467 | __le32_to_cpu(sb->chunksize)) | |
468 | printf(" New Chunksize : %dK\n", | |
469 | __le32_to_cpu(sb->new_chunk)/2); | |
470 | printf("\n"); | |
471 | } | |
472 | if (sb->devflags) { | |
473 | printf(" Flags :"); | |
474 | if (sb->devflags & WriteMostly1) | |
475 | printf(" write-mostly"); | |
476 | if (sb->devflags & FailFast1) | |
477 | printf(" failfast"); | |
478 | printf("\n"); | |
479 | } | |
480 | ||
481 | atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; | |
482 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
483 | ||
484 | if (sb->bblog_size && sb->bblog_offset) { | |
485 | printf(" Bad Block Log : %d entries available at offset %ld sectors", | |
486 | __le16_to_cpu(sb->bblog_size)*512/8, | |
487 | (long)(int32_t)__le32_to_cpu(sb->bblog_offset)); | |
488 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS)) | |
489 | printf(" - bad blocks present."); | |
490 | printf("\n"); | |
491 | } | |
492 | ||
493 | if (calc_sb_1_csum(sb) == sb->sb_csum) | |
494 | printf(" Checksum : %x - correct\n", | |
495 | __le32_to_cpu(sb->sb_csum)); | |
496 | else | |
497 | printf(" Checksum : %x - expected %x\n", | |
498 | __le32_to_cpu(sb->sb_csum), | |
499 | __le32_to_cpu(calc_sb_1_csum(sb))); | |
500 | printf(" Events : %llu\n", | |
501 | (unsigned long long)__le64_to_cpu(sb->events)); | |
502 | printf("\n"); | |
503 | if (__le32_to_cpu(sb->level) == 0 && | |
504 | (sb->feature_map & __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT))) { | |
505 | c = map_num(r0layout, __le32_to_cpu(sb->layout)); | |
506 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
507 | } | |
508 | if (__le32_to_cpu(sb->level) == 5) { | |
509 | c = map_num(r5layout, __le32_to_cpu(sb->layout)); | |
510 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
511 | } | |
512 | if (__le32_to_cpu(sb->level) == 6) { | |
513 | c = map_num(r6layout, __le32_to_cpu(sb->layout)); | |
514 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
515 | } | |
516 | if (__le32_to_cpu(sb->level) == 10) { | |
517 | int lo = __le32_to_cpu(sb->layout); | |
518 | printf(" Layout :"); | |
519 | print_r10_layout(lo); | |
520 | printf("\n"); | |
521 | } | |
522 | switch(__le32_to_cpu(sb->level)) { | |
523 | case 0: | |
524 | case 4: | |
525 | case 5: | |
526 | case 6: | |
527 | case 10: | |
528 | printf(" Chunk Size : %dK\n", | |
529 | __le32_to_cpu(sb->chunksize)/2); | |
530 | break; | |
531 | case -1: | |
532 | printf(" Rounding : %dK\n", | |
533 | __le32_to_cpu(sb->chunksize)/2); | |
534 | break; | |
535 | default: | |
536 | break; | |
537 | } | |
538 | printf("\n"); | |
539 | #if 0 | |
540 | /* This turns out to just be confusing */ | |
541 | printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number)); | |
542 | for (i = __le32_to_cpu(sb->max_dev); i> 0 ; i--) | |
543 | if (__le16_to_cpu(sb->dev_roles[i-1]) != MD_DISK_ROLE_SPARE) | |
544 | break; | |
545 | for (d = 0; d < i; d++) { | |
546 | int role = __le16_to_cpu(sb->dev_roles[d]); | |
547 | if (d) | |
548 | printf(", "); | |
549 | if (role == MD_DISK_ROLE_SPARE) | |
550 | printf("empty"); | |
551 | else | |
552 | if(role == MD_DISK_ROLE_FAULTY) | |
553 | printf("failed"); | |
554 | else | |
555 | printf("%d", role); | |
556 | } | |
557 | printf(")\n"); | |
558 | #endif | |
559 | printf(" Device Role : "); | |
560 | role = role_from_sb(sb); | |
561 | if (role >= MD_DISK_ROLE_FAULTY) | |
562 | printf("spare\n"); | |
563 | else if (role == MD_DISK_ROLE_JOURNAL) | |
564 | printf("Journal\n"); | |
565 | else if (sb->feature_map & __cpu_to_le32(MD_FEATURE_REPLACEMENT)) | |
566 | printf("Replacement device %d\n", role); | |
567 | else | |
568 | printf("Active device %d\n", role); | |
569 | ||
570 | printf(" Array State : "); | |
571 | for (d = 0; d < __le32_to_cpu(sb->raid_disks) + delta_extra; d++) { | |
572 | int cnt = 0; | |
573 | unsigned int i; | |
574 | for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) { | |
575 | unsigned int role = __le16_to_cpu(sb->dev_roles[i]); | |
576 | if (role == d) | |
577 | cnt++; | |
578 | } | |
579 | if (cnt == 2) | |
580 | printf("R"); | |
581 | else if (cnt == 1) | |
582 | printf("A"); | |
583 | else if (cnt == 0) | |
584 | printf("."); | |
585 | else | |
586 | printf("?"); | |
587 | } | |
588 | #if 0 | |
589 | /* This is confusing too */ | |
590 | faulty = 0; | |
591 | for (i = 0; i< __le32_to_cpu(sb->max_dev); i++) { | |
592 | int role = __le16_to_cpu(sb->dev_roles[i]); | |
593 | if (role == MD_DISK_ROLE_FAULTY) | |
594 | faulty++; | |
595 | } | |
596 | if (faulty) | |
597 | printf(" %d failed", faulty); | |
598 | #endif | |
599 | printf(" ('A' == active, '.' == missing, 'R' == replacing)"); | |
600 | printf("\n"); | |
601 | } | |
602 | ||
603 | static void brief_examine_super1(struct supertype *st, int verbose) | |
604 | { | |
605 | struct mdp_superblock_1 *sb = st->sb; | |
606 | int i; | |
607 | unsigned long long sb_offset; | |
608 | char *nm; | |
609 | char *c = map_num(pers, __le32_to_cpu(sb->level)); | |
610 | ||
611 | nm = strchr(sb->set_name, ':'); | |
612 | if (nm) | |
613 | nm++; | |
614 | else if (sb->set_name[0]) | |
615 | nm = sb->set_name; | |
616 | else | |
617 | nm = NULL; | |
618 | ||
619 | printf("ARRAY "); | |
620 | if (nm) { | |
621 | printf("/dev/md/"); | |
622 | print_escape(nm); | |
623 | putchar(' '); | |
624 | } | |
625 | if (verbose && c) | |
626 | printf(" level=%s", c); | |
627 | sb_offset = __le64_to_cpu(sb->super_offset); | |
628 | if (sb_offset <= 4) | |
629 | printf(" metadata=1.1 "); | |
630 | else if (sb_offset <= 8) | |
631 | printf(" metadata=1.2 "); | |
632 | else | |
633 | printf(" metadata=1.0 "); | |
634 | if (verbose) | |
635 | printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks)); | |
636 | printf("UUID="); | |
637 | for (i = 0; i < 16; i++) { | |
638 | if ((i&3)==0 && i != 0) | |
639 | printf(":"); | |
640 | printf("%02x", sb->set_uuid[i]); | |
641 | } | |
642 | if (sb->set_name[0]) { | |
643 | printf(" name="); | |
644 | print_quoted(sb->set_name); | |
645 | } | |
646 | printf("\n"); | |
647 | } | |
648 | ||
649 | static void export_examine_super1(struct supertype *st) | |
650 | { | |
651 | struct mdp_superblock_1 *sb = st->sb; | |
652 | int i; | |
653 | int len = 32; | |
654 | int layout; | |
655 | ||
656 | printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level))); | |
657 | printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks)); | |
658 | for (i = 0; i < 32; i++) | |
659 | if (sb->set_name[i] == '\n' || sb->set_name[i] == '\0') { | |
660 | len = i; | |
661 | break; | |
662 | } | |
663 | if (len) | |
664 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
665 | if (__le32_to_cpu(sb->level) > 0) { | |
666 | int ddsks = 0, ddsks_denom = 1; | |
667 | switch(__le32_to_cpu(sb->level)) { | |
668 | case 1: | |
669 | ddsks = 1; | |
670 | break; | |
671 | case 4: | |
672 | case 5: | |
673 | ddsks = __le32_to_cpu(sb->raid_disks)-1; | |
674 | break; | |
675 | case 6: | |
676 | ddsks = __le32_to_cpu(sb->raid_disks)-2; | |
677 | break; | |
678 | case 10: | |
679 | layout = __le32_to_cpu(sb->layout); | |
680 | ddsks = __le32_to_cpu(sb->raid_disks); | |
681 | ddsks_denom = (layout&255) * ((layout>>8)&255); | |
682 | } | |
683 | if (ddsks) { | |
684 | long long asize = __le64_to_cpu(sb->size); | |
685 | asize = (asize << 9) * ddsks / ddsks_denom; | |
686 | printf("MD_ARRAY_SIZE=%s\n", | |
687 | human_size_brief(asize, JEDEC)); | |
688 | } | |
689 | } | |
690 | printf("MD_UUID="); | |
691 | for (i = 0; i < 16; i++) { | |
692 | if ((i&3) == 0 && i != 0) | |
693 | printf(":"); | |
694 | printf("%02x", sb->set_uuid[i]); | |
695 | } | |
696 | printf("\n"); | |
697 | printf("MD_UPDATE_TIME=%llu\n", | |
698 | __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL); | |
699 | printf("MD_DEV_UUID="); | |
700 | for (i = 0; i < 16; i++) { | |
701 | if ((i&3) == 0 && i != 0) | |
702 | printf(":"); | |
703 | printf("%02x", sb->device_uuid[i]); | |
704 | } | |
705 | printf("\n"); | |
706 | printf("MD_EVENTS=%llu\n", | |
707 | (unsigned long long)__le64_to_cpu(sb->events)); | |
708 | } | |
709 | ||
710 | static int copy_metadata1(struct supertype *st, int from, int to) | |
711 | { | |
712 | /* Read superblock. If it looks good, write it out. | |
713 | * Then if a bitmap is present, copy that. | |
714 | * And if a bad-block-list is present, copy that too. | |
715 | */ | |
716 | void *buf; | |
717 | unsigned long long dsize, sb_offset; | |
718 | const int bufsize = 4*1024; | |
719 | struct mdp_superblock_1 super, *sb; | |
720 | ||
721 | if (posix_memalign(&buf, 4096, bufsize) != 0) | |
722 | return 1; | |
723 | ||
724 | if (!get_dev_size(from, NULL, &dsize)) | |
725 | goto err; | |
726 | ||
727 | dsize >>= 9; | |
728 | if (dsize < 24) | |
729 | goto err; | |
730 | switch(st->minor_version) { | |
731 | case 0: | |
732 | sb_offset = dsize; | |
733 | sb_offset -= 8*2; | |
734 | sb_offset &= ~(4*2-1); | |
735 | break; | |
736 | case 1: | |
737 | sb_offset = 0; | |
738 | break; | |
739 | case 2: | |
740 | sb_offset = 4*2; | |
741 | break; | |
742 | default: | |
743 | goto err; | |
744 | } | |
745 | ||
746 | if (lseek64(from, sb_offset << 9, 0) < 0LL) | |
747 | goto err; | |
748 | if (read(from, buf, bufsize) != bufsize) | |
749 | goto err; | |
750 | ||
751 | sb = buf; | |
752 | super = *sb; // save most of sb for when we reuse buf | |
753 | ||
754 | if (__le32_to_cpu(super.magic) != MD_SB_MAGIC || | |
755 | __le32_to_cpu(super.major_version) != 1 || | |
756 | __le64_to_cpu(super.super_offset) != sb_offset || | |
757 | calc_sb_1_csum(sb) != super.sb_csum) | |
758 | goto err; | |
759 | ||
760 | if (lseek64(to, sb_offset << 9, 0) < 0LL) | |
761 | goto err; | |
762 | if (write(to, buf, bufsize) != bufsize) | |
763 | goto err; | |
764 | ||
765 | if (super.feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) { | |
766 | unsigned long long bitmap_offset = sb_offset; | |
767 | int bytes = 4096; // just an estimate. | |
768 | int written = 0; | |
769 | struct align_fd afrom, ato; | |
770 | ||
771 | init_afd(&afrom, from); | |
772 | init_afd(&ato, to); | |
773 | ||
774 | bitmap_offset += (int32_t)__le32_to_cpu(super.bitmap_offset); | |
775 | ||
776 | if (lseek64(from, bitmap_offset<<9, 0) < 0) | |
777 | goto err; | |
778 | if (lseek64(to, bitmap_offset<<9, 0) < 0) | |
779 | goto err; | |
780 | ||
781 | for (written = 0; written < bytes ; ) { | |
782 | int n = bytes - written; | |
783 | if (n > 4096) | |
784 | n = 4096; | |
785 | if (aread(&afrom, buf, n) != n) | |
786 | goto err; | |
787 | if (written == 0) { | |
788 | /* have the header, can calculate | |
789 | * correct bitmap bytes */ | |
790 | bitmap_super_t *bms; | |
791 | bms = (void*)buf; | |
792 | bytes = calc_bitmap_size(bms, 512); | |
793 | if (n > bytes) | |
794 | n = bytes; | |
795 | } | |
796 | if (awrite(&ato, buf, n) != n) | |
797 | goto err; | |
798 | written += n; | |
799 | } | |
800 | } | |
801 | ||
802 | if (super.bblog_size != 0 && | |
803 | __le16_to_cpu(super.bblog_size) <= 100 && | |
804 | super.bblog_offset != 0 && | |
805 | (super.feature_map & __le32_to_cpu(MD_FEATURE_BAD_BLOCKS))) { | |
806 | /* There is a bad block log */ | |
807 | unsigned long long bb_offset = sb_offset; | |
808 | int bytes = __le16_to_cpu(super.bblog_size) * 512; | |
809 | int written = 0; | |
810 | struct align_fd afrom, ato; | |
811 | ||
812 | init_afd(&afrom, from); | |
813 | init_afd(&ato, to); | |
814 | ||
815 | bb_offset += (int32_t)__le32_to_cpu(super.bblog_offset); | |
816 | ||
817 | if (lseek64(from, bb_offset<<9, 0) < 0) | |
818 | goto err; | |
819 | if (lseek64(to, bb_offset<<9, 0) < 0) | |
820 | goto err; | |
821 | ||
822 | for (written = 0; written < bytes ; ) { | |
823 | int n = bytes - written; | |
824 | if (n > 4096) | |
825 | n = 4096; | |
826 | if (aread(&afrom, buf, n) != n) | |
827 | goto err; | |
828 | ||
829 | if (awrite(&ato, buf, n) != n) | |
830 | goto err; | |
831 | written += n; | |
832 | } | |
833 | } | |
834 | ||
835 | free(buf); | |
836 | return 0; | |
837 | ||
838 | err: | |
839 | free(buf); | |
840 | return 1; | |
841 | } | |
842 | ||
843 | static void detail_super1(struct supertype *st, char *homehost, char *subarray) | |
844 | { | |
845 | struct mdp_superblock_1 *sb = st->sb; | |
846 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE); | |
847 | int i; | |
848 | int l = homehost ? strlen(homehost) : 0; | |
849 | ||
850 | printf(" Name : %.32s", sb->set_name); | |
851 | if (l > 0 && l < 32 && sb->set_name[l] == ':' && | |
852 | strncmp(sb->set_name, homehost, l) == 0) | |
853 | printf(" (local to host %s)", homehost); | |
854 | if (bms->nodes > 0 && | |
855 | (__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) | |
856 | printf("\n Cluster Name : %-64s", bms->cluster_name); | |
857 | printf("\n UUID : "); | |
858 | for (i = 0; i < 16; i++) { | |
859 | if ((i&3) == 0 && i != 0) | |
860 | printf(":"); | |
861 | printf("%02x", sb->set_uuid[i]); | |
862 | } | |
863 | printf("\n Events : %llu\n\n", | |
864 | (unsigned long long)__le64_to_cpu(sb->events)); | |
865 | } | |
866 | ||
867 | static void brief_detail_super1(struct supertype *st, char *subarray) | |
868 | { | |
869 | struct mdp_superblock_1 *sb = st->sb; | |
870 | int i; | |
871 | ||
872 | if (sb->set_name[0]) { | |
873 | printf(" name="); | |
874 | print_quoted(sb->set_name); | |
875 | } | |
876 | printf(" UUID="); | |
877 | for (i = 0; i < 16; i++) { | |
878 | if ((i & 3) == 0 && i != 0) | |
879 | printf(":"); | |
880 | printf("%02x", sb->set_uuid[i]); | |
881 | } | |
882 | } | |
883 | ||
884 | static void export_detail_super1(struct supertype *st) | |
885 | { | |
886 | struct mdp_superblock_1 *sb = st->sb; | |
887 | int i; | |
888 | int len = 32; | |
889 | ||
890 | for (i = 0; i < 32; i++) | |
891 | if (sb->set_name[i] == '\n' || sb->set_name[i] == '\0') { | |
892 | len = i; | |
893 | break; | |
894 | } | |
895 | if (len) | |
896 | printf("MD_NAME=%.*s\n", len, sb->set_name); | |
897 | } | |
898 | ||
899 | static int examine_badblocks_super1(struct supertype *st, int fd, char *devname) | |
900 | { | |
901 | struct mdp_superblock_1 *sb = st->sb; | |
902 | unsigned long long offset; | |
903 | int size; | |
904 | __u64 *bbl, *bbp; | |
905 | int i; | |
906 | ||
907 | if (!sb->bblog_size || __le16_to_cpu(sb->bblog_size) > 100 || | |
908 | !sb->bblog_offset){ | |
909 | printf("No bad-blocks list configured on %s\n", devname); | |
910 | return 0; | |
911 | } | |
912 | if ((sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS)) == 0) { | |
913 | printf("Bad-blocks list is empty in %s\n", devname); | |
914 | return 0; | |
915 | } | |
916 | ||
917 | size = __le16_to_cpu(sb->bblog_size)* 512; | |
918 | if (posix_memalign((void**)&bbl, 4096, size) != 0) { | |
919 | pr_err("could not allocate badblocks list\n"); | |
920 | return 0; | |
921 | } | |
922 | offset = __le64_to_cpu(sb->super_offset) + | |
923 | (int)__le32_to_cpu(sb->bblog_offset); | |
924 | offset <<= 9; | |
925 | if (lseek64(fd, offset, 0) < 0) { | |
926 | pr_err("Cannot seek to bad-blocks list\n"); | |
927 | return 1; | |
928 | } | |
929 | if (read(fd, bbl, size) != size) { | |
930 | pr_err("Cannot read bad-blocks list\n"); | |
931 | return 1; | |
932 | } | |
933 | /* 64bits per entry. 10 bits is block-count, 54 bits is block | |
934 | * offset. Blocks are sectors unless bblog->shift makes them bigger | |
935 | */ | |
936 | bbp = (__u64*)bbl; | |
937 | printf("Bad-blocks on %s:\n", devname); | |
938 | for (i = 0; i < size/8; i++, bbp++) { | |
939 | __u64 bb = __le64_to_cpu(*bbp); | |
940 | int count = bb & 0x3ff; | |
941 | unsigned long long sector = bb >> 10; | |
942 | ||
943 | if (bb + 1 == 0) | |
944 | break; | |
945 | ||
946 | sector <<= sb->bblog_shift; | |
947 | count <<= sb->bblog_shift; | |
948 | ||
949 | printf("%20llu for %d sectors\n", sector, count); | |
950 | } | |
951 | return 0; | |
952 | } | |
953 | ||
954 | static int match_home1(struct supertype *st, char *homehost) | |
955 | { | |
956 | struct mdp_superblock_1 *sb = st->sb; | |
957 | int l = homehost ? strlen(homehost) : 0; | |
958 | ||
959 | return (l > 0 && l < 32 && sb->set_name[l] == ':' && | |
960 | strncmp(sb->set_name, homehost, l) == 0); | |
961 | } | |
962 | ||
963 | static void uuid_from_super1(struct supertype *st, int uuid[4]) | |
964 | { | |
965 | struct mdp_superblock_1 *super = st->sb; | |
966 | char *cuuid = (char*)uuid; | |
967 | int i; | |
968 | for (i = 0; i < 16; i++) | |
969 | cuuid[i] = super->set_uuid[i]; | |
970 | } | |
971 | ||
972 | static void getinfo_super1(struct supertype *st, struct mdinfo *info, char *map) | |
973 | { | |
974 | struct mdp_superblock_1 *sb = st->sb; | |
975 | struct bitmap_super_s *bsb = (void*)(((char*)sb)+MAX_SB_SIZE); | |
976 | struct misc_dev_info *misc = | |
977 | (void*)(((char*)sb)+MAX_SB_SIZE+BM_SUPER_SIZE); | |
978 | int working = 0; | |
979 | unsigned int i; | |
980 | unsigned int role; | |
981 | unsigned int map_disks = info->array.raid_disks; | |
982 | unsigned long long super_offset; | |
983 | unsigned long long data_size; | |
984 | ||
985 | memset(info, 0, sizeof(*info)); | |
986 | info->array.major_version = 1; | |
987 | info->array.minor_version = st->minor_version; | |
988 | info->array.patch_version = 0; | |
989 | info->array.raid_disks = __le32_to_cpu(sb->raid_disks); | |
990 | info->array.level = __le32_to_cpu(sb->level); | |
991 | info->array.layout = __le32_to_cpu(sb->layout); | |
992 | info->array.md_minor = -1; | |
993 | info->array.ctime = __le64_to_cpu(sb->ctime); | |
994 | info->array.utime = __le64_to_cpu(sb->utime); | |
995 | info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; | |
996 | info->array.state = | |
997 | (__le64_to_cpu(sb->resync_offset) == MaxSector) ? 1 : 0; | |
998 | ||
999 | super_offset = __le64_to_cpu(sb->super_offset); | |
1000 | info->data_offset = __le64_to_cpu(sb->data_offset); | |
1001 | info->component_size = __le64_to_cpu(sb->size); | |
1002 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) { | |
1003 | info->bitmap_offset = (int32_t)__le32_to_cpu(sb->bitmap_offset); | |
1004 | if (__le32_to_cpu(bsb->nodes) > 1) | |
1005 | info->array.state |= (1 << MD_SB_CLUSTERED); | |
1006 | } else if (md_feature_any_ppl_on(sb->feature_map)) { | |
1007 | info->ppl_offset = __le16_to_cpu(sb->ppl.offset); | |
1008 | info->ppl_size = __le16_to_cpu(sb->ppl.size); | |
1009 | info->ppl_sector = super_offset + info->ppl_offset; | |
1010 | } | |
1011 | ||
1012 | info->disk.major = 0; | |
1013 | info->disk.minor = 0; | |
1014 | info->disk.number = __le32_to_cpu(sb->dev_number); | |
1015 | if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || | |
1016 | __le32_to_cpu(sb->dev_number) >= MAX_DEVS) | |
1017 | role = MD_DISK_ROLE_FAULTY; | |
1018 | else | |
1019 | role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); | |
1020 | ||
1021 | if (info->array.level <= 0) | |
1022 | data_size = __le64_to_cpu(sb->data_size); | |
1023 | else | |
1024 | data_size = __le64_to_cpu(sb->size); | |
1025 | if (info->data_offset < super_offset) { | |
1026 | unsigned long long end; | |
1027 | info->space_before = info->data_offset; | |
1028 | end = super_offset; | |
1029 | ||
1030 | if (sb->bblog_offset && sb->bblog_size) { | |
1031 | unsigned long long bboffset = super_offset; | |
1032 | bboffset += (int32_t)__le32_to_cpu(sb->bblog_offset); | |
1033 | if (bboffset < end) | |
1034 | end = bboffset; | |
1035 | } | |
1036 | ||
1037 | if (super_offset + info->bitmap_offset + info->ppl_offset < end) | |
1038 | end = super_offset + info->bitmap_offset + | |
1039 | info->ppl_offset; | |
1040 | ||
1041 | if (info->data_offset + data_size < end) | |
1042 | info->space_after = end - data_size - info->data_offset; | |
1043 | else | |
1044 | info->space_after = 0; | |
1045 | } else { | |
1046 | unsigned long long earliest; | |
1047 | earliest = super_offset + (32+4)*2; /* match kernel */ | |
1048 | if (info->bitmap_offset > 0) { | |
1049 | unsigned long long bmend = info->bitmap_offset; | |
1050 | unsigned long long size = calc_bitmap_size(bsb, 4096); | |
1051 | size /= 512; | |
1052 | bmend += size; | |
1053 | if (bmend > earliest) | |
1054 | earliest = bmend; | |
1055 | } else if (info->ppl_offset > 0) { | |
1056 | unsigned long long pplend; | |
1057 | ||
1058 | pplend = info->ppl_offset + info->ppl_size; | |
1059 | if (pplend > earliest) | |
1060 | earliest = pplend; | |
1061 | } | |
1062 | if (sb->bblog_offset && sb->bblog_size) { | |
1063 | unsigned long long bbend = super_offset; | |
1064 | bbend += (int32_t)__le32_to_cpu(sb->bblog_offset); | |
1065 | bbend += __le16_to_cpu(sb->bblog_size); | |
1066 | if (bbend > earliest) | |
1067 | earliest = bbend; | |
1068 | } | |
1069 | if (earliest < info->data_offset) | |
1070 | info->space_before = info->data_offset - earliest; | |
1071 | else | |
1072 | info->space_before = 0; | |
1073 | info->space_after = misc->device_size - data_size - | |
1074 | info->data_offset; | |
1075 | } | |
1076 | if (info->space_before == 0 && info->space_after == 0) { | |
1077 | /* It will look like we don't support data_offset changes, | |
1078 | * be we do - it's just that there is no room. | |
1079 | * A change that reduced the number of devices should | |
1080 | * still be allowed, so set the otherwise useless value of '1' | |
1081 | */ | |
1082 | info->space_after = 1; | |
1083 | } | |
1084 | ||
1085 | info->disk.raid_disk = -1; | |
1086 | switch(role) { | |
1087 | case MD_DISK_ROLE_SPARE: | |
1088 | /* spare: not active, not sync, not faulty */ | |
1089 | info->disk.state = 0; | |
1090 | break; | |
1091 | case MD_DISK_ROLE_FAULTY: | |
1092 | info->disk.state = (1 << MD_DISK_FAULTY); /* faulty */ | |
1093 | break; | |
1094 | case MD_DISK_ROLE_JOURNAL: | |
1095 | info->disk.state = (1 << MD_DISK_JOURNAL); | |
1096 | info->disk.raid_disk = role; | |
1097 | /* journal uses all 4kB blocks*/ | |
1098 | info->space_after = (misc->device_size - info->data_offset) % 8; | |
1099 | break; | |
1100 | default: | |
1101 | info->disk.state = 6; /* active and in sync */ | |
1102 | info->disk.raid_disk = role; | |
1103 | } | |
1104 | if (sb->devflags & WriteMostly1) | |
1105 | info->disk.state |= (1 << MD_DISK_WRITEMOSTLY); | |
1106 | if (sb->devflags & FailFast1) | |
1107 | info->disk.state |= (1 << MD_DISK_FAILFAST); | |
1108 | info->events = __le64_to_cpu(sb->events); | |
1109 | sprintf(info->text_version, "1.%d", st->minor_version); | |
1110 | info->safe_mode_delay = 200; | |
1111 | ||
1112 | memcpy(info->uuid, sb->set_uuid, 16); | |
1113 | ||
1114 | strncpy(info->name, sb->set_name, 32); | |
1115 | info->name[32] = 0; | |
1116 | ||
1117 | if ((__le32_to_cpu(sb->feature_map)&MD_FEATURE_REPLACEMENT)) { | |
1118 | info->disk.state &= ~(1 << MD_DISK_SYNC); | |
1119 | info->disk.state |= 1 << MD_DISK_REPLACEMENT; | |
1120 | } | |
1121 | ||
1122 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET)) | |
1123 | info->recovery_start = __le32_to_cpu(sb->recovery_offset); | |
1124 | else | |
1125 | info->recovery_start = MaxSector; | |
1126 | ||
1127 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { | |
1128 | info->reshape_active = 1; | |
1129 | if ((sb->feature_map & __le32_to_cpu(MD_FEATURE_NEW_OFFSET)) && | |
1130 | sb->new_offset != 0) | |
1131 | info->reshape_active |= RESHAPE_NO_BACKUP; | |
1132 | info->reshape_progress = __le64_to_cpu(sb->reshape_position); | |
1133 | info->new_level = __le32_to_cpu(sb->new_level); | |
1134 | info->delta_disks = __le32_to_cpu(sb->delta_disks); | |
1135 | info->new_layout = __le32_to_cpu(sb->new_layout); | |
1136 | info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; | |
1137 | if (info->delta_disks < 0) | |
1138 | info->array.raid_disks -= info->delta_disks; | |
1139 | } else | |
1140 | info->reshape_active = 0; | |
1141 | ||
1142 | info->recovery_blocked = info->reshape_active; | |
1143 | ||
1144 | if (map) | |
1145 | for (i=0; i<map_disks; i++) | |
1146 | map[i] = 0; | |
1147 | for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) { | |
1148 | role = __le16_to_cpu(sb->dev_roles[i]); | |
1149 | if (/*role == MD_DISK_ROLE_SPARE || */role < (unsigned) info->array.raid_disks) { | |
1150 | working++; | |
1151 | if (map && role < map_disks) | |
1152 | map[role] = 1; | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | info->array.working_disks = working; | |
1157 | ||
1158 | if (sb->feature_map & __le32_to_cpu(MD_FEATURE_JOURNAL)) { | |
1159 | info->journal_device_required = 1; | |
1160 | info->consistency_policy = CONSISTENCY_POLICY_JOURNAL; | |
1161 | } else if (md_feature_any_ppl_on(sb->feature_map)) { | |
1162 | info->consistency_policy = CONSISTENCY_POLICY_PPL; | |
1163 | } else if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) { | |
1164 | info->consistency_policy = CONSISTENCY_POLICY_BITMAP; | |
1165 | } else if (info->array.level <= 0) { | |
1166 | info->consistency_policy = CONSISTENCY_POLICY_NONE; | |
1167 | } else { | |
1168 | info->consistency_policy = CONSISTENCY_POLICY_RESYNC; | |
1169 | } | |
1170 | ||
1171 | info->journal_clean = 0; | |
1172 | } | |
1173 | ||
1174 | static struct mdinfo *container_content1(struct supertype *st, char *subarray) | |
1175 | { | |
1176 | struct mdinfo *info; | |
1177 | ||
1178 | if (subarray) | |
1179 | return NULL; | |
1180 | ||
1181 | info = xmalloc(sizeof(*info)); | |
1182 | getinfo_super1(st, info, NULL); | |
1183 | return info; | |
1184 | } | |
1185 | ||
1186 | static int update_super1(struct supertype *st, struct mdinfo *info, | |
1187 | char *update, char *devname, int verbose, | |
1188 | int uuid_set, char *homehost) | |
1189 | { | |
1190 | /* NOTE: for 'assemble' and 'force' we need to return non-zero | |
1191 | * if any change was made. For others, the return value is | |
1192 | * ignored. | |
1193 | */ | |
1194 | int rv = 0; | |
1195 | struct mdp_superblock_1 *sb = st->sb; | |
1196 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE); | |
1197 | ||
1198 | if (strcmp(update, "homehost") == 0 && | |
1199 | homehost) { | |
1200 | /* Note that 'homehost' is special as it is really | |
1201 | * a "name" update. | |
1202 | */ | |
1203 | char *c; | |
1204 | update = "name"; | |
1205 | c = strchr(sb->set_name, ':'); | |
1206 | if (c) | |
1207 | strncpy(info->name, c+1, 31 - (c-sb->set_name)); | |
1208 | else | |
1209 | strncpy(info->name, sb->set_name, 32); | |
1210 | info->name[32] = 0; | |
1211 | } | |
1212 | ||
1213 | if (strcmp(update, "force-one")==0) { | |
1214 | /* Not enough devices for a working array, | |
1215 | * so bring this one up-to-date | |
1216 | */ | |
1217 | if (sb->events != __cpu_to_le64(info->events)) | |
1218 | rv = 1; | |
1219 | sb->events = __cpu_to_le64(info->events); | |
1220 | } else if (strcmp(update, "force-array")==0) { | |
1221 | /* Degraded array and 'force' requests to | |
1222 | * maybe need to mark it 'clean'. | |
1223 | */ | |
1224 | switch(__le32_to_cpu(sb->level)) { | |
1225 | case 4: | |
1226 | case 5: | |
1227 | case 6: | |
1228 | /* need to force clean */ | |
1229 | if (sb->resync_offset != MaxSector) | |
1230 | rv = 1; | |
1231 | sb->resync_offset = MaxSector; | |
1232 | } | |
1233 | } else if (strcmp(update, "assemble")==0) { | |
1234 | int d = info->disk.number; | |
1235 | int want; | |
1236 | if (info->disk.state & (1<<MD_DISK_ACTIVE)) | |
1237 | want = info->disk.raid_disk; | |
1238 | else if (info->disk.state & (1<<MD_DISK_JOURNAL)) | |
1239 | want = MD_DISK_ROLE_JOURNAL; | |
1240 | else | |
1241 | want = MD_DISK_ROLE_SPARE; | |
1242 | if (sb->dev_roles[d] != __cpu_to_le16(want)) { | |
1243 | sb->dev_roles[d] = __cpu_to_le16(want); | |
1244 | rv = 1; | |
1245 | } | |
1246 | if (info->reshape_active && | |
1247 | sb->feature_map & | |
1248 | __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) && | |
1249 | info->delta_disks >= 0 && | |
1250 | info->reshape_progress < | |
1251 | __le64_to_cpu(sb->reshape_position)) { | |
1252 | sb->reshape_position = | |
1253 | __cpu_to_le64(info->reshape_progress); | |
1254 | rv = 1; | |
1255 | } | |
1256 | if (info->reshape_active && | |
1257 | sb->feature_map & | |
1258 | __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) && | |
1259 | info->delta_disks < 0 && | |
1260 | info->reshape_progress > | |
1261 | __le64_to_cpu(sb->reshape_position)) { | |
1262 | sb->reshape_position = | |
1263 | __cpu_to_le64(info->reshape_progress); | |
1264 | rv = 1; | |
1265 | } | |
1266 | } else if (strcmp(update, "linear-grow-new") == 0) { | |
1267 | unsigned int i; | |
1268 | int fd; | |
1269 | unsigned int max = __le32_to_cpu(sb->max_dev); | |
1270 | ||
1271 | for (i = 0; i < max; i++) | |
1272 | if (__le16_to_cpu(sb->dev_roles[i]) >= | |
1273 | MD_DISK_ROLE_FAULTY) | |
1274 | break; | |
1275 | sb->dev_number = __cpu_to_le32(i); | |
1276 | info->disk.number = i; | |
1277 | if (i >= max) { | |
1278 | sb->max_dev = __cpu_to_le32(max+1); | |
1279 | } | |
1280 | ||
1281 | random_uuid(sb->device_uuid); | |
1282 | ||
1283 | sb->dev_roles[i] = __cpu_to_le16(info->disk.raid_disk); | |
1284 | ||
1285 | fd = open(devname, O_RDONLY); | |
1286 | if (fd >= 0) { | |
1287 | unsigned long long ds; | |
1288 | get_dev_size(fd, devname, &ds); | |
1289 | close(fd); | |
1290 | ds >>= 9; | |
1291 | if (__le64_to_cpu(sb->super_offset) < | |
1292 | __le64_to_cpu(sb->data_offset)) { | |
1293 | sb->data_size = __cpu_to_le64( | |
1294 | ds - __le64_to_cpu(sb->data_offset)); | |
1295 | } else { | |
1296 | ds -= 8*2; | |
1297 | ds &= ~(unsigned long long)(4*2-1); | |
1298 | sb->super_offset = __cpu_to_le64(ds); | |
1299 | sb->data_size = __cpu_to_le64( | |
1300 | ds - __le64_to_cpu(sb->data_offset)); | |
1301 | } | |
1302 | } | |
1303 | } else if (strcmp(update, "linear-grow-update") == 0) { | |
1304 | int max = __le32_to_cpu(sb->max_dev); | |
1305 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
1306 | if (info->array.raid_disks > max) { | |
1307 | sb->max_dev = __cpu_to_le32(max+1); | |
1308 | } | |
1309 | sb->dev_roles[info->disk.number] = | |
1310 | __cpu_to_le16(info->disk.raid_disk); | |
1311 | } else if (strcmp(update, "resync") == 0) { | |
1312 | /* make sure resync happens */ | |
1313 | sb->resync_offset = 0ULL; | |
1314 | } else if (strcmp(update, "uuid") == 0) { | |
1315 | copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid); | |
1316 | ||
1317 | if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) | |
1318 | memcpy(bms->uuid, sb->set_uuid, 16); | |
1319 | } else if (strcmp(update, "no-bitmap") == 0) { | |
1320 | sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); | |
1321 | } else if (strcmp(update, "bbl") == 0) { | |
1322 | /* only possible if there is room after the bitmap, or if | |
1323 | * there is no bitmap | |
1324 | */ | |
1325 | unsigned long long sb_offset = __le64_to_cpu(sb->super_offset); | |
1326 | unsigned long long data_offset = __le64_to_cpu(sb->data_offset); | |
1327 | long bitmap_offset = 0; | |
1328 | long bm_sectors = 0; | |
1329 | long space; | |
1330 | ||
1331 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
1332 | bitmap_offset = (long)__le32_to_cpu(sb->bitmap_offset); | |
1333 | bm_sectors = calc_bitmap_size(bms, 4096) >> 9; | |
1334 | } else if (md_feature_any_ppl_on(sb->feature_map)) { | |
1335 | bitmap_offset = (long)__le16_to_cpu(sb->ppl.offset); | |
1336 | bm_sectors = (long)__le16_to_cpu(sb->ppl.size); | |
1337 | } | |
1338 | ||
1339 | if (sb_offset < data_offset) { | |
1340 | /* | |
1341 | * 1.1 or 1.2. Put bbl after bitmap leaving | |
1342 | * at least 32K | |
1343 | */ | |
1344 | long bb_offset; | |
1345 | bb_offset = sb_offset + 8; | |
1346 | if (bm_sectors && bitmap_offset > 0) | |
1347 | bb_offset = bitmap_offset + bm_sectors; | |
1348 | while (bb_offset < (long)sb_offset + 8 + 32*2 && | |
1349 | bb_offset + 8+8 <= (long)data_offset) | |
1350 | /* too close to bitmap, and room to grow */ | |
1351 | bb_offset += 8; | |
1352 | if (bb_offset + 8 <= (long)data_offset) { | |
1353 | sb->bblog_size = __cpu_to_le16(8); | |
1354 | sb->bblog_offset = __cpu_to_le32(bb_offset); | |
1355 | } | |
1356 | } else { | |
1357 | /* 1.0 - Put bbl just before super block */ | |
1358 | if (bm_sectors && bitmap_offset < 0) | |
1359 | space = -bitmap_offset - bm_sectors; | |
1360 | else | |
1361 | space = sb_offset - data_offset - | |
1362 | __le64_to_cpu(sb->data_size); | |
1363 | if (space >= 8) { | |
1364 | sb->bblog_size = __cpu_to_le16(8); | |
1365 | sb->bblog_offset = __cpu_to_le32((unsigned)-8); | |
1366 | } | |
1367 | } | |
1368 | } else if (strcmp(update, "no-bbl") == 0) { | |
1369 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS)) | |
1370 | pr_err("Cannot remove active bbl from %s\n",devname); | |
1371 | else { | |
1372 | sb->bblog_size = 0; | |
1373 | sb->bblog_shift = 0; | |
1374 | sb->bblog_offset = 0; | |
1375 | } | |
1376 | } else if (strcmp(update, "force-no-bbl") == 0) { | |
1377 | sb->feature_map &= ~ __cpu_to_le32(MD_FEATURE_BAD_BLOCKS); | |
1378 | sb->bblog_size = 0; | |
1379 | sb->bblog_shift = 0; | |
1380 | sb->bblog_offset = 0; | |
1381 | } else if (strcmp(update, "ppl") == 0) { | |
1382 | unsigned long long sb_offset = __le64_to_cpu(sb->super_offset); | |
1383 | unsigned long long data_offset = __le64_to_cpu(sb->data_offset); | |
1384 | unsigned long long data_size = __le64_to_cpu(sb->data_size); | |
1385 | long bb_offset = __le32_to_cpu(sb->bblog_offset); | |
1386 | int space; | |
1387 | int offset; | |
1388 | ||
1389 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
1390 | pr_err("Cannot add PPL to array with bitmap\n"); | |
1391 | return -2; | |
1392 | } | |
1393 | ||
1394 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_JOURNAL)) { | |
1395 | pr_err("Cannot add PPL to array with journal\n"); | |
1396 | return -2; | |
1397 | } | |
1398 | ||
1399 | if (sb_offset < data_offset) { | |
1400 | if (bb_offset) | |
1401 | space = bb_offset - 8; | |
1402 | else | |
1403 | space = data_offset - sb_offset - 8; | |
1404 | offset = 8; | |
1405 | } else { | |
1406 | offset = -(sb_offset - data_offset - data_size); | |
1407 | if (offset < INT16_MIN) | |
1408 | offset = INT16_MIN; | |
1409 | space = -(offset - bb_offset); | |
1410 | } | |
1411 | ||
1412 | if (space < (PPL_HEADER_SIZE >> 9) + 8) { | |
1413 | pr_err("Not enough space to add ppl\n"); | |
1414 | return -2; | |
1415 | } | |
1416 | ||
1417 | if (space >= (MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9)) { | |
1418 | space = (MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9); | |
1419 | } else { | |
1420 | int optimal_space = choose_ppl_space( | |
1421 | __le32_to_cpu(sb->chunksize)); | |
1422 | if (space > optimal_space) | |
1423 | space = optimal_space; | |
1424 | if (space > UINT16_MAX) | |
1425 | space = UINT16_MAX; | |
1426 | } | |
1427 | ||
1428 | sb->ppl.offset = __cpu_to_le16(offset); | |
1429 | sb->ppl.size = __cpu_to_le16(space); | |
1430 | sb->feature_map |= __cpu_to_le32(MD_FEATURE_PPL); | |
1431 | } else if (strcmp(update, "no-ppl") == 0) { | |
1432 | sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_PPL | | |
1433 | MD_FEATURE_MUTLIPLE_PPLS); | |
1434 | } else if (strcmp(update, "name") == 0) { | |
1435 | if (info->name[0] == 0) | |
1436 | sprintf(info->name, "%d", info->array.md_minor); | |
1437 | memset(sb->set_name, 0, sizeof(sb->set_name)); | |
1438 | if (homehost && | |
1439 | strchr(info->name, ':') == NULL && | |
1440 | strlen(homehost)+1+strlen(info->name) < 32) { | |
1441 | strcpy(sb->set_name, homehost); | |
1442 | strcat(sb->set_name, ":"); | |
1443 | strcat(sb->set_name, info->name); | |
1444 | } else { | |
1445 | int namelen; | |
1446 | ||
1447 | namelen = min((int)strlen(info->name), | |
1448 | (int)sizeof(sb->set_name) - 1); | |
1449 | memcpy(sb->set_name, info->name, namelen); | |
1450 | memset(&sb->set_name[namelen], '\0', | |
1451 | sizeof(sb->set_name) - namelen); | |
1452 | } | |
1453 | } else if (strcmp(update, "devicesize") == 0 && | |
1454 | __le64_to_cpu(sb->super_offset) < | |
1455 | __le64_to_cpu(sb->data_offset)) { | |
1456 | /* set data_size to device size less data_offset */ | |
1457 | struct misc_dev_info *misc = (struct misc_dev_info*) | |
1458 | (st->sb + MAX_SB_SIZE + BM_SUPER_SIZE); | |
1459 | sb->data_size = __cpu_to_le64( | |
1460 | misc->device_size - __le64_to_cpu(sb->data_offset)); | |
1461 | } else if (strncmp(update, "revert-reshape", 14) == 0) { | |
1462 | rv = -2; | |
1463 | if (!(sb->feature_map & | |
1464 | __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE))) | |
1465 | pr_err("No active reshape to revert on %s\n", | |
1466 | devname); | |
1467 | else { | |
1468 | __u32 temp; | |
1469 | unsigned long long reshape_sectors; | |
1470 | long reshape_chunk; | |
1471 | rv = 0; | |
1472 | /* If the reshape hasn't started, just stop it. | |
1473 | * It is conceivable that a stripe was modified but | |
1474 | * the metadata not updated. In that case the backup | |
1475 | * should have been used to get passed the critical stage. | |
1476 | * If that couldn't happen, the "-nobackup" version | |
1477 | * will be used. | |
1478 | */ | |
1479 | if (strcmp(update, "revert-reshape-nobackup") == 0 && | |
1480 | sb->reshape_position == 0 && | |
1481 | (__le32_to_cpu(sb->delta_disks) > 0 || | |
1482 | (__le32_to_cpu(sb->delta_disks) == 0 && | |
1483 | !(sb->feature_map & __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS))))) { | |
1484 | sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); | |
1485 | sb->raid_disks = __cpu_to_le32(__le32_to_cpu(sb->raid_disks) - | |
1486 | __le32_to_cpu(sb->delta_disks)); | |
1487 | sb->delta_disks = 0; | |
1488 | goto done; | |
1489 | } | |
1490 | /* reshape_position is a little messy. | |
1491 | * Its value must be a multiple of the larger | |
1492 | * chunk size, and of the "after" data disks. | |
1493 | * So when reverting we need to change it to | |
1494 | * be a multiple of the new "after" data disks, | |
1495 | * which is the old "before". | |
1496 | * If it isn't already a multiple of 'before', | |
1497 | * the only thing we could do would be | |
1498 | * copy some block around on the disks, which | |
1499 | * is easy to get wrong. | |
1500 | * So we reject a revert-reshape unless the | |
1501 | * alignment is good. | |
1502 | */ | |
1503 | if (__le32_to_cpu(sb->level) >= 4 && | |
1504 | __le32_to_cpu(sb->level) <= 6) { | |
1505 | reshape_sectors = | |
1506 | __le64_to_cpu(sb->reshape_position); | |
1507 | reshape_chunk = __le32_to_cpu(sb->new_chunk); | |
1508 | reshape_chunk *= __le32_to_cpu(sb->raid_disks) - | |
1509 | __le32_to_cpu(sb->delta_disks) - | |
1510 | (__le32_to_cpu(sb->level)==6 ? 2 : 1); | |
1511 | if (reshape_sectors % reshape_chunk) { | |
1512 | pr_err("Reshape position is not suitably aligned.\n"); | |
1513 | pr_err("Try normal assembly and stop again\n"); | |
1514 | return -2; | |
1515 | } | |
1516 | } | |
1517 | sb->raid_disks = | |
1518 | __cpu_to_le32(__le32_to_cpu(sb->raid_disks) - | |
1519 | __le32_to_cpu(sb->delta_disks)); | |
1520 | if (sb->delta_disks == 0) | |
1521 | sb->feature_map ^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); | |
1522 | else | |
1523 | sb->delta_disks = __cpu_to_le32(-__le32_to_cpu(sb->delta_disks)); | |
1524 | ||
1525 | temp = sb->new_layout; | |
1526 | sb->new_layout = sb->layout; | |
1527 | sb->layout = temp; | |
1528 | ||
1529 | temp = sb->new_chunk; | |
1530 | sb->new_chunk = sb->chunksize; | |
1531 | sb->chunksize = temp; | |
1532 | ||
1533 | if (sb->feature_map & | |
1534 | __cpu_to_le32(MD_FEATURE_NEW_OFFSET)) { | |
1535 | long offset_delta = | |
1536 | (int32_t)__le32_to_cpu(sb->new_offset); | |
1537 | sb->data_offset = __cpu_to_le64(__le64_to_cpu(sb->data_offset) + offset_delta); | |
1538 | sb->new_offset = __cpu_to_le32(-offset_delta); | |
1539 | sb->data_size = __cpu_to_le64(__le64_to_cpu(sb->data_size) - offset_delta); | |
1540 | } | |
1541 | done:; | |
1542 | } | |
1543 | } else if (strcmp(update, "_reshape_progress") == 0) | |
1544 | sb->reshape_position = __cpu_to_le64(info->reshape_progress); | |
1545 | else if (strcmp(update, "writemostly") == 0) | |
1546 | sb->devflags |= WriteMostly1; | |
1547 | else if (strcmp(update, "readwrite") == 0) | |
1548 | sb->devflags &= ~WriteMostly1; | |
1549 | else if (strcmp(update, "failfast") == 0) | |
1550 | sb->devflags |= FailFast1; | |
1551 | else if (strcmp(update, "nofailfast") == 0) | |
1552 | sb->devflags &= ~FailFast1; | |
1553 | else | |
1554 | rv = -1; | |
1555 | ||
1556 | sb->sb_csum = calc_sb_1_csum(sb); | |
1557 | ||
1558 | return rv; | |
1559 | } | |
1560 | ||
1561 | static int init_super1(struct supertype *st, mdu_array_info_t *info, | |
1562 | struct shape *s, char *name, char *homehost, | |
1563 | int *uuid, unsigned long long data_offset) | |
1564 | { | |
1565 | struct mdp_superblock_1 *sb; | |
1566 | int spares; | |
1567 | char defname[10]; | |
1568 | int sbsize; | |
1569 | ||
1570 | if (posix_memalign((void**)&sb, 4096, SUPER1_SIZE) != 0) { | |
1571 | pr_err("could not allocate superblock\n"); | |
1572 | return 0; | |
1573 | } | |
1574 | memset(sb, 0, SUPER1_SIZE); | |
1575 | ||
1576 | st->sb = sb; | |
1577 | if (info == NULL) { | |
1578 | /* zeroing superblock */ | |
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | spares = info->working_disks - info->active_disks; | |
1583 | if (info->raid_disks + spares > MAX_DEVS) { | |
1584 | pr_err("too many devices requested: %d+%d > %d\n", | |
1585 | info->raid_disks , spares, MAX_DEVS); | |
1586 | return 0; | |
1587 | } | |
1588 | ||
1589 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
1590 | sb->major_version = __cpu_to_le32(1); | |
1591 | sb->feature_map = 0; | |
1592 | sb->pad0 = 0; | |
1593 | ||
1594 | if (uuid) | |
1595 | copy_uuid(sb->set_uuid, uuid, super1.swapuuid); | |
1596 | else | |
1597 | random_uuid(sb->set_uuid);; | |
1598 | ||
1599 | if (name == NULL || *name == 0) { | |
1600 | sprintf(defname, "%d", info->md_minor); | |
1601 | name = defname; | |
1602 | } | |
1603 | if (homehost && | |
1604 | strchr(name, ':')== NULL && | |
1605 | strlen(homehost)+1+strlen(name) < 32) { | |
1606 | strcpy(sb->set_name, homehost); | |
1607 | strcat(sb->set_name, ":"); | |
1608 | strcat(sb->set_name, name); | |
1609 | } else { | |
1610 | int namelen; | |
1611 | ||
1612 | namelen = min((int)strlen(name), | |
1613 | (int)sizeof(sb->set_name) - 1); | |
1614 | memcpy(sb->set_name, name, namelen); | |
1615 | memset(&sb->set_name[namelen], '\0', | |
1616 | sizeof(sb->set_name) - namelen); | |
1617 | } | |
1618 | ||
1619 | sb->ctime = __cpu_to_le64((unsigned long long)time(0)); | |
1620 | sb->level = __cpu_to_le32(info->level); | |
1621 | sb->layout = __cpu_to_le32(info->layout); | |
1622 | sb->size = __cpu_to_le64(s->size*2ULL); | |
1623 | sb->chunksize = __cpu_to_le32(info->chunk_size>>9); | |
1624 | sb->raid_disks = __cpu_to_le32(info->raid_disks); | |
1625 | ||
1626 | sb->data_offset = __cpu_to_le64(data_offset); | |
1627 | sb->data_size = __cpu_to_le64(0); | |
1628 | sb->super_offset = __cpu_to_le64(0); | |
1629 | sb->recovery_offset = __cpu_to_le64(0); | |
1630 | ||
1631 | sb->utime = sb->ctime; | |
1632 | sb->events = __cpu_to_le64(1); | |
1633 | if (info->state & (1<<MD_SB_CLEAN)) | |
1634 | sb->resync_offset = MaxSector; | |
1635 | else | |
1636 | sb->resync_offset = 0; | |
1637 | sbsize = sizeof(struct mdp_superblock_1) + | |
1638 | 2 * (info->raid_disks + spares); | |
1639 | sbsize = ROUND_UP(sbsize, 512); | |
1640 | sb->max_dev = | |
1641 | __cpu_to_le32((sbsize - sizeof(struct mdp_superblock_1)) / 2); | |
1642 | ||
1643 | memset(sb->dev_roles, 0xff, | |
1644 | MAX_SB_SIZE - sizeof(struct mdp_superblock_1)); | |
1645 | ||
1646 | if (s->consistency_policy == CONSISTENCY_POLICY_PPL) | |
1647 | sb->feature_map |= __cpu_to_le32(MD_FEATURE_PPL); | |
1648 | ||
1649 | return 1; | |
1650 | } | |
1651 | ||
1652 | struct devinfo { | |
1653 | int fd; | |
1654 | char *devname; | |
1655 | long long data_offset; | |
1656 | unsigned long long dev_size; | |
1657 | mdu_disk_info_t disk; | |
1658 | struct devinfo *next; | |
1659 | }; | |
1660 | ||
1661 | /* Add a device to the superblock being created */ | |
1662 | static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk, | |
1663 | int fd, char *devname, unsigned long long data_offset) | |
1664 | { | |
1665 | struct mdp_superblock_1 *sb = st->sb; | |
1666 | __u16 *rp = sb->dev_roles + dk->number; | |
1667 | struct devinfo *di, **dip; | |
1668 | int dk_state; | |
1669 | ||
1670 | dk_state = dk->state & ~(1<<MD_DISK_FAILFAST); | |
1671 | if ((dk_state & (1<<MD_DISK_ACTIVE)) && | |
1672 | (dk_state & (1<<MD_DISK_SYNC)))/* active, sync */ | |
1673 | *rp = __cpu_to_le16(dk->raid_disk); | |
1674 | else if (dk_state & (1<<MD_DISK_JOURNAL)) | |
1675 | *rp = MD_DISK_ROLE_JOURNAL; | |
1676 | else if ((dk_state & ~(1<<MD_DISK_ACTIVE)) == 0) | |
1677 | /* active or idle -> spare */ | |
1678 | *rp = MD_DISK_ROLE_SPARE; | |
1679 | else | |
1680 | *rp = MD_DISK_ROLE_FAULTY; | |
1681 | ||
1682 | if (dk->number >= (int)__le32_to_cpu(sb->max_dev) && | |
1683 | __le32_to_cpu(sb->max_dev) < MAX_DEVS) | |
1684 | sb->max_dev = __cpu_to_le32(dk->number+1); | |
1685 | ||
1686 | sb->dev_number = __cpu_to_le32(dk->number); | |
1687 | sb->devflags = 0; /* don't copy another disks flags */ | |
1688 | sb->sb_csum = calc_sb_1_csum(sb); | |
1689 | ||
1690 | dip = (struct devinfo **)&st->info; | |
1691 | while (*dip) | |
1692 | dip = &(*dip)->next; | |
1693 | di = xmalloc(sizeof(struct devinfo)); | |
1694 | di->fd = fd; | |
1695 | di->devname = devname; | |
1696 | di->disk = *dk; | |
1697 | di->data_offset = data_offset; | |
1698 | get_dev_size(fd, NULL, &di->dev_size); | |
1699 | di->next = NULL; | |
1700 | *dip = di; | |
1701 | ||
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | static int locate_bitmap1(struct supertype *st, int fd, int node_num); | |
1706 | ||
1707 | static int store_super1(struct supertype *st, int fd) | |
1708 | { | |
1709 | struct mdp_superblock_1 *sb = st->sb; | |
1710 | unsigned long long sb_offset; | |
1711 | struct align_fd afd; | |
1712 | int sbsize; | |
1713 | unsigned long long dsize; | |
1714 | ||
1715 | if (!get_dev_size(fd, NULL, &dsize)) | |
1716 | return 1; | |
1717 | ||
1718 | dsize >>= 9; | |
1719 | ||
1720 | if (dsize < 24) | |
1721 | return 2; | |
1722 | ||
1723 | init_afd(&afd, fd); | |
1724 | ||
1725 | /* | |
1726 | * Calculate the position of the superblock. | |
1727 | * It is always aligned to a 4K boundary and | |
1728 | * depending on minor_version, it can be: | |
1729 | * 0: At least 8K, but less than 12K, from end of device | |
1730 | * 1: At start of device | |
1731 | * 2: 4K from start of device. | |
1732 | */ | |
1733 | switch(st->minor_version) { | |
1734 | case 0: | |
1735 | sb_offset = dsize; | |
1736 | sb_offset -= 8*2; | |
1737 | sb_offset &= ~(4*2-1); | |
1738 | break; | |
1739 | case 1: | |
1740 | sb_offset = 0; | |
1741 | break; | |
1742 | case 2: | |
1743 | sb_offset = 4*2; | |
1744 | break; | |
1745 | default: | |
1746 | return -EINVAL; | |
1747 | } | |
1748 | ||
1749 | if (sb_offset != __le64_to_cpu(sb->super_offset) && | |
1750 | 0 != __le64_to_cpu(sb->super_offset) | |
1751 | ) { | |
1752 | pr_err("internal error - sb_offset is wrong\n"); | |
1753 | abort(); | |
1754 | } | |
1755 | ||
1756 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) | |
1757 | return 3; | |
1758 | ||
1759 | sbsize = ROUND_UP(sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev), 512); | |
1760 | ||
1761 | if (awrite(&afd, sb, sbsize) != sbsize) | |
1762 | return 4; | |
1763 | ||
1764 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
1765 | struct bitmap_super_s *bm = (struct bitmap_super_s*) | |
1766 | (((char*)sb)+MAX_SB_SIZE); | |
1767 | if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { | |
1768 | locate_bitmap1(st, fd, 0); | |
1769 | if (awrite(&afd, bm, sizeof(*bm)) != sizeof(*bm)) | |
1770 | return 5; | |
1771 | } | |
1772 | } | |
1773 | fsync(fd); | |
1774 | ||
1775 | return 0; | |
1776 | } | |
1777 | ||
1778 | static int load_super1(struct supertype *st, int fd, char *devname); | |
1779 | ||
1780 | static unsigned long choose_bm_space(unsigned long devsize) | |
1781 | { | |
1782 | /* if the device is bigger than 8Gig, save 64k for bitmap usage, | |
1783 | * if bigger than 200Gig, save 128k | |
1784 | * NOTE: result must be multiple of 4K else bad things happen | |
1785 | * on 4K-sector devices. | |
1786 | */ | |
1787 | if (devsize < 64*2) | |
1788 | return 0; | |
1789 | if (devsize - 64*2 >= 200*1024*1024*2) | |
1790 | return 128*2; | |
1791 | if (devsize - 4*2 > 8*1024*1024*2) | |
1792 | return 64*2; | |
1793 | return 4*2; | |
1794 | } | |
1795 | ||
1796 | static void free_super1(struct supertype *st); | |
1797 | ||
1798 | __u32 crc32c_le(__u32 crc, unsigned char const *p, size_t len); | |
1799 | ||
1800 | static int write_init_ppl1(struct supertype *st, struct mdinfo *info, int fd) | |
1801 | { | |
1802 | struct mdp_superblock_1 *sb = st->sb; | |
1803 | void *buf; | |
1804 | struct ppl_header *ppl_hdr; | |
1805 | int ret; | |
1806 | ||
1807 | /* first clear entire ppl space */ | |
1808 | ret = zero_disk_range(fd, info->ppl_sector, info->ppl_size); | |
1809 | if (ret) | |
1810 | return ret; | |
1811 | ||
1812 | ret = posix_memalign(&buf, 4096, PPL_HEADER_SIZE); | |
1813 | if (ret) { | |
1814 | pr_err("Failed to allocate PPL header buffer\n"); | |
1815 | return ret; | |
1816 | } | |
1817 | ||
1818 | memset(buf, 0, PPL_HEADER_SIZE); | |
1819 | ppl_hdr = buf; | |
1820 | memset(ppl_hdr->reserved, 0xff, PPL_HDR_RESERVED); | |
1821 | ppl_hdr->signature = __cpu_to_le32(~crc32c_le(~0, sb->set_uuid, | |
1822 | sizeof(sb->set_uuid))); | |
1823 | ppl_hdr->checksum = __cpu_to_le32(~crc32c_le(~0, buf, PPL_HEADER_SIZE)); | |
1824 | ||
1825 | if (lseek64(fd, info->ppl_sector * 512, SEEK_SET) < 0) { | |
1826 | ret = errno; | |
1827 | perror("Failed to seek to PPL header location"); | |
1828 | } | |
1829 | ||
1830 | if (!ret && write(fd, buf, PPL_HEADER_SIZE) != PPL_HEADER_SIZE) { | |
1831 | ret = errno; | |
1832 | perror("Write PPL header failed"); | |
1833 | } | |
1834 | ||
1835 | if (!ret) | |
1836 | fsync(fd); | |
1837 | ||
1838 | free(buf); | |
1839 | return ret; | |
1840 | } | |
1841 | ||
1842 | #define META_BLOCK_SIZE 4096 | |
1843 | ||
1844 | static int write_empty_r5l_meta_block(struct supertype *st, int fd) | |
1845 | { | |
1846 | struct r5l_meta_block *mb; | |
1847 | struct mdp_superblock_1 *sb = st->sb; | |
1848 | struct align_fd afd; | |
1849 | __u32 crc; | |
1850 | ||
1851 | init_afd(&afd, fd); | |
1852 | ||
1853 | if (posix_memalign((void**)&mb, 4096, META_BLOCK_SIZE) != 0) { | |
1854 | pr_err("Could not allocate memory for the meta block.\n"); | |
1855 | return 1; | |
1856 | } | |
1857 | ||
1858 | memset(mb, 0, META_BLOCK_SIZE); | |
1859 | ||
1860 | mb->magic = __cpu_to_le32(R5LOG_MAGIC); | |
1861 | mb->version = R5LOG_VERSION; | |
1862 | mb->meta_size = __cpu_to_le32(sizeof(struct r5l_meta_block)); | |
1863 | mb->seq = __cpu_to_le64(random32()); | |
1864 | mb->position = __cpu_to_le64(0); | |
1865 | ||
1866 | crc = crc32c_le(0xffffffff, sb->set_uuid, sizeof(sb->set_uuid)); | |
1867 | crc = crc32c_le(crc, (void *)mb, META_BLOCK_SIZE); | |
1868 | mb->checksum = crc; | |
1869 | ||
1870 | if (lseek64(fd, __le64_to_cpu(sb->data_offset) * 512, 0) < 0LL) { | |
1871 | pr_err("cannot seek to offset of the meta block\n"); | |
1872 | goto fail_to_write; | |
1873 | } | |
1874 | ||
1875 | if (awrite(&afd, mb, META_BLOCK_SIZE) != META_BLOCK_SIZE) { | |
1876 | pr_err("failed to store write the meta block \n"); | |
1877 | goto fail_to_write; | |
1878 | } | |
1879 | fsync(fd); | |
1880 | ||
1881 | free(mb); | |
1882 | return 0; | |
1883 | ||
1884 | fail_to_write: | |
1885 | free(mb); | |
1886 | return 1; | |
1887 | } | |
1888 | ||
1889 | static int write_init_super1(struct supertype *st) | |
1890 | { | |
1891 | struct mdp_superblock_1 *sb = st->sb; | |
1892 | struct supertype *refst; | |
1893 | int rv = 0; | |
1894 | unsigned long long bm_space; | |
1895 | struct devinfo *di; | |
1896 | unsigned long long dsize, array_size; | |
1897 | unsigned long long sb_offset; | |
1898 | unsigned long long data_offset; | |
1899 | long bm_offset; | |
1900 | int raid0_need_layout = 0; | |
1901 | ||
1902 | for (di = st->info; di; di = di->next) { | |
1903 | if (di->disk.state & (1 << MD_DISK_JOURNAL)) | |
1904 | sb->feature_map |= __cpu_to_le32(MD_FEATURE_JOURNAL); | |
1905 | if (sb->level == 0 && sb->layout != 0) { | |
1906 | struct devinfo *di2 = st->info; | |
1907 | unsigned long long s1, s2; | |
1908 | s1 = di->dev_size; | |
1909 | if (di->data_offset != INVALID_SECTORS) | |
1910 | s1 -= di->data_offset; | |
1911 | s1 /= __le32_to_cpu(sb->chunksize); | |
1912 | s2 = di2->dev_size; | |
1913 | if (di2->data_offset != INVALID_SECTORS) | |
1914 | s2 -= di2->data_offset; | |
1915 | s2 /= __le32_to_cpu(sb->chunksize); | |
1916 | if (s1 != s2) | |
1917 | raid0_need_layout = 1; | |
1918 | } | |
1919 | } | |
1920 | ||
1921 | for (di = st->info; di; di = di->next) { | |
1922 | if (di->disk.state & (1 << MD_DISK_FAULTY)) | |
1923 | continue; | |
1924 | if (di->fd < 0) | |
1925 | continue; | |
1926 | ||
1927 | while (Kill(di->devname, NULL, 0, -1, 1) == 0) | |
1928 | ; | |
1929 | ||
1930 | sb->dev_number = __cpu_to_le32(di->disk.number); | |
1931 | if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY)) | |
1932 | sb->devflags |= WriteMostly1; | |
1933 | else | |
1934 | sb->devflags &= ~WriteMostly1; | |
1935 | if (di->disk.state & (1<<MD_DISK_FAILFAST)) | |
1936 | sb->devflags |= FailFast1; | |
1937 | else | |
1938 | sb->devflags &= ~FailFast1; | |
1939 | ||
1940 | random_uuid(sb->device_uuid); | |
1941 | ||
1942 | if (!(di->disk.state & (1<<MD_DISK_JOURNAL))) | |
1943 | sb->events = 0; | |
1944 | ||
1945 | refst = dup_super(st); | |
1946 | if (load_super1(refst, di->fd, NULL)==0) { | |
1947 | struct mdp_superblock_1 *refsb = refst->sb; | |
1948 | ||
1949 | memcpy(sb->device_uuid, refsb->device_uuid, 16); | |
1950 | if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { | |
1951 | /* same array, so preserve events and | |
1952 | * dev_number */ | |
1953 | sb->events = refsb->events; | |
1954 | /* bugs in 2.6.17 and earlier mean the | |
1955 | * dev_number chosen in Manage must be preserved | |
1956 | */ | |
1957 | if (get_linux_version() >= 2006018) | |
1958 | sb->dev_number = refsb->dev_number; | |
1959 | } | |
1960 | free_super1(refst); | |
1961 | } | |
1962 | free(refst); | |
1963 | ||
1964 | if (!get_dev_size(di->fd, NULL, &dsize)) { | |
1965 | rv = 1; | |
1966 | goto error_out; | |
1967 | } | |
1968 | dsize >>= 9; | |
1969 | ||
1970 | if (dsize < 24) { | |
1971 | close(di->fd); | |
1972 | rv = 2; | |
1973 | goto error_out; | |
1974 | } | |
1975 | ||
1976 | /* | |
1977 | * Calculate the position of the superblock. | |
1978 | * It is always aligned to a 4K boundary and | |
1979 | * depending on minor_version, it can be: | |
1980 | * 0: At least 8K, but less than 12K, from end of device | |
1981 | * 1: At start of device | |
1982 | * 2: 4K from start of device. | |
1983 | * data_offset has already been set. | |
1984 | */ | |
1985 | array_size = __le64_to_cpu(sb->size); | |
1986 | ||
1987 | /* work out how much space we left for a bitmap */ | |
1988 | if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { | |
1989 | bitmap_super_t *bms = (bitmap_super_t *) | |
1990 | (((char *)sb) + MAX_SB_SIZE); | |
1991 | bm_space = calc_bitmap_size(bms, 4096) >> 9; | |
1992 | bm_offset = (long)__le32_to_cpu(sb->bitmap_offset); | |
1993 | } else if (md_feature_any_ppl_on(sb->feature_map)) { | |
1994 | bm_space = MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9; | |
1995 | if (st->minor_version == 0) | |
1996 | bm_offset = -bm_space - 8; | |
1997 | else | |
1998 | bm_offset = 8; | |
1999 | sb->ppl.offset = __cpu_to_le16(bm_offset); | |
2000 | sb->ppl.size = __cpu_to_le16(bm_space); | |
2001 | } else { | |
2002 | bm_space = choose_bm_space(array_size); | |
2003 | bm_offset = 8; | |
2004 | } | |
2005 | ||
2006 | data_offset = di->data_offset; | |
2007 | if (data_offset == INVALID_SECTORS) | |
2008 | data_offset = st->data_offset; | |
2009 | switch(st->minor_version) { | |
2010 | case 0: | |
2011 | /* Add 8 sectors for bad block log */ | |
2012 | bm_space += 8; | |
2013 | if (data_offset == INVALID_SECTORS) | |
2014 | data_offset = 0; | |
2015 | sb_offset = dsize; | |
2016 | sb_offset -= 8*2; | |
2017 | sb_offset &= ~(4*2-1); | |
2018 | sb->data_offset = __cpu_to_le64(data_offset); | |
2019 | sb->super_offset = __cpu_to_le64(sb_offset); | |
2020 | if (sb_offset < array_size + bm_space) | |
2021 | bm_space = sb_offset - array_size; | |
2022 | sb->data_size = __cpu_to_le64(sb_offset - bm_space); | |
2023 | if (bm_space >= 8) { | |
2024 | sb->bblog_size = __cpu_to_le16(8); | |
2025 | sb->bblog_offset = __cpu_to_le32((unsigned)-8); | |
2026 | } | |
2027 | break; | |
2028 | case 1: | |
2029 | case 2: | |
2030 | sb_offset = st->minor_version == 2 ? 8 : 0; | |
2031 | sb->super_offset = __cpu_to_le64(sb_offset); | |
2032 | if (data_offset == INVALID_SECTORS) | |
2033 | data_offset = sb_offset + 16; | |
2034 | ||
2035 | sb->data_offset = __cpu_to_le64(data_offset); | |
2036 | sb->data_size = __cpu_to_le64(dsize - data_offset); | |
2037 | if (data_offset >= sb_offset+bm_offset+bm_space+8) { | |
2038 | sb->bblog_size = __cpu_to_le16(8); | |
2039 | sb->bblog_offset = __cpu_to_le32(bm_offset + | |
2040 | bm_space); | |
2041 | } else if (data_offset >= sb_offset + 16) { | |
2042 | sb->bblog_size = __cpu_to_le16(8); | |
2043 | /* '8' sectors for the bblog, and 'sb_offset' | |
2044 | * because we want offset from superblock, not | |
2045 | * start of device. | |
2046 | */ | |
2047 | sb->bblog_offset = __cpu_to_le32(data_offset - | |
2048 | 8 - sb_offset); | |
2049 | } | |
2050 | break; | |
2051 | default: | |
2052 | pr_err("Failed to write invalid metadata format 1.%i to %s\n", | |
2053 | st->minor_version, di->devname); | |
2054 | rv = -EINVAL; | |
2055 | goto out; | |
2056 | } | |
2057 | /* | |
2058 | * Disable badblock log on clusters, or when | |
2059 | * explicitly requested | |
2060 | */ | |
2061 | if (st->nodes > 0 || conf_get_create_info()->bblist == 0) { | |
2062 | sb->bblog_size = 0; | |
2063 | sb->bblog_offset = 0; | |
2064 | } | |
2065 | ||
2066 | /* RAID0 needs a layout if devices aren't all the same size */ | |
2067 | if (raid0_need_layout) | |
2068 | sb->feature_map |= __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT); | |
2069 | ||
2070 | sb->sb_csum = calc_sb_1_csum(sb); | |
2071 | rv = store_super1(st, di->fd); | |
2072 | ||
2073 | if (rv == 0 && (di->disk.state & (1 << MD_DISK_JOURNAL))) { | |
2074 | rv = write_empty_r5l_meta_block(st, di->fd); | |
2075 | if (rv) | |
2076 | goto error_out; | |
2077 | } | |
2078 | ||
2079 | if (rv == 0 && | |
2080 | (__le32_to_cpu(sb->feature_map) & | |
2081 | MD_FEATURE_BITMAP_OFFSET)) { | |
2082 | rv = st->ss->write_bitmap(st, di->fd, NodeNumUpdate); | |
2083 | } else if (rv == 0 && | |
2084 | md_feature_any_ppl_on(sb->feature_map)) { | |
2085 | struct mdinfo info; | |
2086 | ||
2087 | st->ss->getinfo_super(st, &info, NULL); | |
2088 | rv = st->ss->write_init_ppl(st, &info, di->fd); | |
2089 | } | |
2090 | ||
2091 | close(di->fd); | |
2092 | di->fd = -1; | |
2093 | if (rv) | |
2094 | goto error_out; | |
2095 | } | |
2096 | error_out: | |
2097 | if (rv) | |
2098 | pr_err("Failed to write metadata to %s\n", di->devname); | |
2099 | out: | |
2100 | return rv; | |
2101 | } | |
2102 | ||
2103 | static int compare_super1(struct supertype *st, struct supertype *tst) | |
2104 | { | |
2105 | /* | |
2106 | * return: | |
2107 | * 0 same, or first was empty, and second was copied | |
2108 | * 1 second had wrong number | |
2109 | * 2 wrong uuid | |
2110 | * 3 wrong other info | |
2111 | */ | |
2112 | struct mdp_superblock_1 *first = st->sb; | |
2113 | struct mdp_superblock_1 *second = tst->sb; | |
2114 | ||
2115 | if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) | |
2116 | return 1; | |
2117 | if (second->major_version != __cpu_to_le32(1)) | |
2118 | return 1; | |
2119 | ||
2120 | if (!first) { | |
2121 | if (posix_memalign((void**)&first, 4096, SUPER1_SIZE) != 0) { | |
2122 | pr_err("could not allocate superblock\n"); | |
2123 | return 1; | |
2124 | } | |
2125 | memcpy(first, second, SUPER1_SIZE); | |
2126 | st->sb = first; | |
2127 | return 0; | |
2128 | } | |
2129 | if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) | |
2130 | return 2; | |
2131 | ||
2132 | if (first->ctime != second->ctime || | |
2133 | first->level != second->level || | |
2134 | first->layout != second->layout || | |
2135 | first->size != second->size || | |
2136 | first->chunksize != second->chunksize || | |
2137 | first->raid_disks != second->raid_disks) | |
2138 | return 3; | |
2139 | return 0; | |
2140 | } | |
2141 | ||
2142 | static int load_super1(struct supertype *st, int fd, char *devname) | |
2143 | { | |
2144 | unsigned long long dsize; | |
2145 | unsigned long long sb_offset; | |
2146 | struct mdp_superblock_1 *super; | |
2147 | int uuid[4]; | |
2148 | struct bitmap_super_s *bsb; | |
2149 | struct misc_dev_info *misc; | |
2150 | struct align_fd afd; | |
2151 | ||
2152 | free_super1(st); | |
2153 | ||
2154 | init_afd(&afd, fd); | |
2155 | ||
2156 | if (st->ss == NULL || st->minor_version == -1) { | |
2157 | int bestvers = -1; | |
2158 | struct supertype tst; | |
2159 | __u64 bestctime = 0; | |
2160 | /* guess... choose latest ctime */ | |
2161 | memset(&tst, 0, sizeof(tst)); | |
2162 | tst.ss = &super1; | |
2163 | for (tst.minor_version = 0; tst.minor_version <= 2; | |
2164 | tst.minor_version++) { | |
2165 | switch(load_super1(&tst, fd, devname)) { | |
2166 | case 0: super = tst.sb; | |
2167 | if (bestvers == -1 || | |
2168 | bestctime < __le64_to_cpu(super->ctime)) { | |
2169 | bestvers = tst.minor_version; | |
2170 | bestctime = __le64_to_cpu(super->ctime); | |
2171 | } | |
2172 | free(super); | |
2173 | tst.sb = NULL; | |
2174 | break; | |
2175 | case 1: return 1; /*bad device */ | |
2176 | case 2: break; /* bad, try next */ | |
2177 | } | |
2178 | } | |
2179 | if (bestvers != -1) { | |
2180 | int rv; | |
2181 | tst.minor_version = bestvers; | |
2182 | tst.ss = &super1; | |
2183 | tst.max_devs = MAX_DEVS; | |
2184 | rv = load_super1(&tst, fd, devname); | |
2185 | if (rv == 0) | |
2186 | *st = tst; | |
2187 | return rv; | |
2188 | } | |
2189 | return 2; | |
2190 | } | |
2191 | if (!get_dev_size(fd, devname, &dsize)) | |
2192 | return 1; | |
2193 | dsize >>= 9; | |
2194 | ||
2195 | if (dsize < 24) { | |
2196 | if (devname) | |
2197 | pr_err("%s is too small for md: size is %llu sectors.\n", | |
2198 | devname, dsize); | |
2199 | return 1; | |
2200 | } | |
2201 | ||
2202 | /* | |
2203 | * Calculate the position of the superblock. | |
2204 | * It is always aligned to a 4K boundary and | |
2205 | * depending on minor_version, it can be: | |
2206 | * 0: At least 8K, but less than 12K, from end of device | |
2207 | * 1: At start of device | |
2208 | * 2: 4K from start of device. | |
2209 | */ | |
2210 | switch(st->minor_version) { | |
2211 | case 0: | |
2212 | sb_offset = dsize; | |
2213 | sb_offset -= 8*2; | |
2214 | sb_offset &= ~(4*2-1); | |
2215 | break; | |
2216 | case 1: | |
2217 | sb_offset = 0; | |
2218 | break; | |
2219 | case 2: | |
2220 | sb_offset = 4*2; | |
2221 | break; | |
2222 | default: | |
2223 | return -EINVAL; | |
2224 | } | |
2225 | ||
2226 | if (lseek64(fd, sb_offset << 9, 0)< 0LL) { | |
2227 | if (devname) | |
2228 | pr_err("Cannot seek to superblock on %s: %s\n", | |
2229 | devname, strerror(errno)); | |
2230 | return 1; | |
2231 | } | |
2232 | ||
2233 | if (posix_memalign((void**)&super, 4096, SUPER1_SIZE) != 0) { | |
2234 | pr_err("could not allocate superblock\n"); | |
2235 | return 1; | |
2236 | } | |
2237 | ||
2238 | memset(super, 0, SUPER1_SIZE); | |
2239 | ||
2240 | if (aread(&afd, super, MAX_SB_SIZE) != MAX_SB_SIZE) { | |
2241 | if (devname) | |
2242 | pr_err("Cannot read superblock on %s\n", | |
2243 | devname); | |
2244 | free(super); | |
2245 | return 1; | |
2246 | } | |
2247 | ||
2248 | if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { | |
2249 | if (devname) | |
2250 | pr_err("No super block found on %s (Expected magic %08x, got %08x)\n", | |
2251 | devname, MD_SB_MAGIC, | |
2252 | __le32_to_cpu(super->magic)); | |
2253 | free(super); | |
2254 | return 2; | |
2255 | } | |
2256 | ||
2257 | if (__le32_to_cpu(super->major_version) != 1) { | |
2258 | if (devname) | |
2259 | pr_err("Cannot interpret superblock on %s - version is %d\n", | |
2260 | devname, __le32_to_cpu(super->major_version)); | |
2261 | free(super); | |
2262 | return 2; | |
2263 | } | |
2264 | if (__le64_to_cpu(super->super_offset) != sb_offset) { | |
2265 | if (devname) | |
2266 | pr_err("No superblock found on %s (super_offset is wrong)\n", | |
2267 | devname); | |
2268 | free(super); | |
2269 | return 2; | |
2270 | } | |
2271 | st->sb = super; | |
2272 | ||
2273 | bsb = (struct bitmap_super_s *)(((char*)super)+MAX_SB_SIZE); | |
2274 | ||
2275 | misc = (struct misc_dev_info*) | |
2276 | (((char*)super)+MAX_SB_SIZE+BM_SUPER_SIZE); | |
2277 | misc->device_size = dsize; | |
2278 | if (st->data_offset == INVALID_SECTORS) | |
2279 | st->data_offset = __le64_to_cpu(super->data_offset); | |
2280 | ||
2281 | /* Now check on the bitmap superblock */ | |
2282 | if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0) | |
2283 | return 0; | |
2284 | /* Read the bitmap superblock and make sure it looks | |
2285 | * valid. If it doesn't clear the bit. An --assemble --force | |
2286 | * should get that written out. | |
2287 | */ | |
2288 | locate_bitmap1(st, fd, 0); | |
2289 | if (aread(&afd, bsb, 512) != 512) | |
2290 | goto no_bitmap; | |
2291 | ||
2292 | uuid_from_super1(st, uuid); | |
2293 | if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || | |
2294 | memcmp(bsb->uuid, uuid, 16) != 0) | |
2295 | goto no_bitmap; | |
2296 | return 0; | |
2297 | ||
2298 | no_bitmap: | |
2299 | super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) | |
2300 | & ~MD_FEATURE_BITMAP_OFFSET); | |
2301 | return 0; | |
2302 | } | |
2303 | ||
2304 | static struct supertype *match_metadata_desc1(char *arg) | |
2305 | { | |
2306 | struct supertype *st = xcalloc(1, sizeof(*st)); | |
2307 | ||
2308 | st->container_devnm[0] = 0; | |
2309 | st->ss = &super1; | |
2310 | st->max_devs = MAX_DEVS; | |
2311 | st->sb = NULL; | |
2312 | st->data_offset = INVALID_SECTORS; | |
2313 | /* leading zeros can be safely ignored. --detail generates them. */ | |
2314 | while (*arg == '0') | |
2315 | arg++; | |
2316 | if (strcmp(arg, "1.0") == 0 || strcmp(arg, "1.00") == 0) { | |
2317 | st->minor_version = 0; | |
2318 | return st; | |
2319 | } | |
2320 | if (strcmp(arg, "1.1") == 0 || strcmp(arg, "1.01") == 0 | |
2321 | ) { | |
2322 | st->minor_version = 1; | |
2323 | return st; | |
2324 | } | |
2325 | if (strcmp(arg, "1.2") == 0 || | |
2326 | #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */ | |
2327 | strcmp(arg, "default") == 0 || | |
2328 | #endif /* DEFAULT_OLD_METADATA */ | |
2329 | strcmp(arg, "1.02") == 0) { | |
2330 | st->minor_version = 2; | |
2331 | return st; | |
2332 | } | |
2333 | if (strcmp(arg, "1") == 0 || strcmp(arg, "default") == 0) { | |
2334 | st->minor_version = -1; | |
2335 | return st; | |
2336 | } | |
2337 | ||
2338 | free(st); | |
2339 | return NULL; | |
2340 | } | |
2341 | ||
2342 | /* find available size on device with this devsize, using | |
2343 | * superblock type st, and reserving 'reserve' sectors for | |
2344 | * a possible bitmap | |
2345 | */ | |
2346 | static __u64 avail_size1(struct supertype *st, __u64 devsize, | |
2347 | unsigned long long data_offset) | |
2348 | { | |
2349 | struct mdp_superblock_1 *super = st->sb; | |
2350 | int bmspace = 0; | |
2351 | int bbspace = 0; | |
2352 | if (devsize < 24) | |
2353 | return 0; | |
2354 | ||
2355 | if (__le32_to_cpu(super->feature_map) & MD_FEATURE_BITMAP_OFFSET) { | |
2356 | /* hot-add. allow for actual size of bitmap */ | |
2357 | struct bitmap_super_s *bsb; | |
2358 | bsb = (struct bitmap_super_s *)(((char*)super)+MAX_SB_SIZE); | |
2359 | bmspace = calc_bitmap_size(bsb, 4096) >> 9; | |
2360 | } else if (md_feature_any_ppl_on(super->feature_map)) { | |
2361 | bmspace = __le16_to_cpu(super->ppl.size); | |
2362 | } | |
2363 | ||
2364 | /* Allow space for bad block log */ | |
2365 | if (super->bblog_size) | |
2366 | bbspace = __le16_to_cpu(super->bblog_size); | |
2367 | ||
2368 | if (st->minor_version < 0) | |
2369 | /* not specified, so time to set default */ | |
2370 | st->minor_version = 2; | |
2371 | ||
2372 | if (data_offset == INVALID_SECTORS) | |
2373 | data_offset = st->data_offset; | |
2374 | ||
2375 | if (data_offset != INVALID_SECTORS) | |
2376 | switch(st->minor_version) { | |
2377 | case 0: | |
2378 | return devsize - data_offset - 8*2 - bbspace; | |
2379 | case 1: | |
2380 | case 2: | |
2381 | return devsize - data_offset; | |
2382 | default: | |
2383 | return 0; | |
2384 | } | |
2385 | ||
2386 | devsize -= bmspace; | |
2387 | ||
2388 | switch(st->minor_version) { | |
2389 | case 0: | |
2390 | /* at end */ | |
2391 | return ((devsize - 8*2 - bbspace ) & ~(4*2-1)); | |
2392 | case 1: | |
2393 | /* at start, 4K for superblock and possible bitmap */ | |
2394 | return devsize - 4*2 - bbspace; | |
2395 | case 2: | |
2396 | /* 4k from start, 4K for superblock and possible bitmap */ | |
2397 | return devsize - (4+4)*2 - bbspace; | |
2398 | } | |
2399 | return 0; | |
2400 | } | |
2401 | ||
2402 | static int | |
2403 | add_internal_bitmap1(struct supertype *st, | |
2404 | int *chunkp, int delay, int write_behind, | |
2405 | unsigned long long size, | |
2406 | int may_change, int major) | |
2407 | { | |
2408 | /* | |
2409 | * If not may_change, then this is a 'Grow' without sysfs support for | |
2410 | * bitmaps, and the bitmap must fit after the superblock at 1K offset. | |
2411 | * If may_change, then this is create or a Grow with sysfs support, | |
2412 | * and we can put the bitmap wherever we like. | |
2413 | * | |
2414 | * size is in sectors, chunk is in bytes !!! | |
2415 | */ | |
2416 | ||
2417 | unsigned long long bits; | |
2418 | unsigned long long max_bits; | |
2419 | unsigned long long min_chunk; | |
2420 | long offset; | |
2421 | long bbl_offset, bbl_size; | |
2422 | unsigned long long chunk = *chunkp; | |
2423 | int room = 0; | |
2424 | int creating = 0; | |
2425 | int len; | |
2426 | struct mdp_superblock_1 *sb = st->sb; | |
2427 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE); | |
2428 | int uuid[4]; | |
2429 | ||
2430 | if (__le64_to_cpu(sb->data_size) == 0) | |
2431 | /* | |
2432 | * Must be creating the array, else data_size | |
2433 | * would be non-zero | |
2434 | */ | |
2435 | creating = 1; | |
2436 | switch(st->minor_version) { | |
2437 | case 0: | |
2438 | /* | |
2439 | * either 3K after the superblock (when hot-add), | |
2440 | * or some amount of space before. | |
2441 | */ | |
2442 | if (creating) { | |
2443 | /* | |
2444 | * We are creating array, so we *know* how much room has | |
2445 | * been left. | |
2446 | */ | |
2447 | offset = 0; | |
2448 | bbl_size = 8; | |
2449 | room = | |
2450 | choose_bm_space(__le64_to_cpu(sb->size)) + bbl_size; | |
2451 | } else { | |
2452 | room = __le64_to_cpu(sb->super_offset) | |
2453 | - __le64_to_cpu(sb->data_offset) | |
2454 | - __le64_to_cpu(sb->data_size); | |
2455 | bbl_size = __le16_to_cpu(sb->bblog_size); | |
2456 | if (bbl_size < 8) | |
2457 | bbl_size = 8; | |
2458 | bbl_offset = (__s32)__le32_to_cpu(sb->bblog_offset); | |
2459 | if (bbl_size < -bbl_offset) | |
2460 | bbl_size = -bbl_offset; | |
2461 | ||
2462 | if (!may_change || | |
2463 | (room < 3*2 && __le32_to_cpu(sb->max_dev) <= 384)) { | |
2464 | room = 3*2; | |
2465 | offset = 1*2; | |
2466 | bbl_size = 0; | |
2467 | } else { | |
2468 | offset = 0; /* means movable offset */ | |
2469 | } | |
2470 | } | |
2471 | break; | |
2472 | case 1: | |
2473 | case 2: /* between superblock and data */ | |
2474 | if (creating) { | |
2475 | offset = 4*2; | |
2476 | bbl_size = 8; | |
2477 | room = | |
2478 | choose_bm_space(__le64_to_cpu(sb->size)) + bbl_size; | |
2479 | } else { | |
2480 | room = __le64_to_cpu(sb->data_offset) | |
2481 | - __le64_to_cpu(sb->super_offset); | |
2482 | bbl_size = __le16_to_cpu(sb->bblog_size); | |
2483 | if (bbl_size) | |
2484 | room = | |
2485 | __le32_to_cpu(sb->bblog_offset) + bbl_size; | |
2486 | else | |
2487 | bbl_size = 8; | |
2488 | ||
2489 | if (!may_change) { | |
2490 | room -= 2; /* Leave 1K for superblock */ | |
2491 | offset = 2; | |
2492 | bbl_size = 0; | |
2493 | } else { | |
2494 | room -= 4*2; /* leave 4K for superblock */ | |
2495 | offset = 4*2; | |
2496 | } | |
2497 | } | |
2498 | break; | |
2499 | default: | |
2500 | return -ENOSPC; | |
2501 | } | |
2502 | ||
2503 | room -= bbl_size; | |
2504 | if (chunk == UnSet && room > 128*2) | |
2505 | /* Limit to 128K of bitmap when chunk size not requested */ | |
2506 | room = 128*2; | |
2507 | ||
2508 | if (room <= 1) | |
2509 | /* No room for a bitmap */ | |
2510 | return -ENOSPC; | |
2511 | ||
2512 | max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8; | |
2513 | ||
2514 | min_chunk = 4096; /* sub-page chunks don't work yet.. */ | |
2515 | bits = (size*512)/min_chunk +1; | |
2516 | while (bits > max_bits) { | |
2517 | min_chunk *= 2; | |
2518 | bits = (bits+1)/2; | |
2519 | } | |
2520 | if (chunk == UnSet) { | |
2521 | /* For practical purpose, 64Meg is a good | |
2522 | * default chunk size for internal bitmaps. | |
2523 | */ | |
2524 | chunk = min_chunk; | |
2525 | if (chunk < 64*1024*1024) | |
2526 | chunk = 64*1024*1024; | |
2527 | } else if (chunk < min_chunk) | |
2528 | return -EINVAL; /* chunk size too small */ | |
2529 | if (chunk == 0) /* rounding problem */ | |
2530 | return -EINVAL; | |
2531 | ||
2532 | if (offset == 0) { | |
2533 | /* start bitmap on a 4K boundary with enough space for | |
2534 | * the bitmap | |
2535 | */ | |
2536 | bits = (size*512) / chunk + 1; | |
2537 | room = ((bits+7)/8 + sizeof(bitmap_super_t) +4095)/4096; | |
2538 | room *= 8; /* convert 4K blocks to sectors */ | |
2539 | offset = -room - bbl_size; | |
2540 | } | |
2541 | ||
2542 | sb->bitmap_offset = (int32_t)__cpu_to_le32(offset); | |
2543 | ||
2544 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | | |
2545 | MD_FEATURE_BITMAP_OFFSET); | |
2546 | memset(bms, 0, sizeof(*bms)); | |
2547 | bms->magic = __cpu_to_le32(BITMAP_MAGIC); | |
2548 | bms->version = __cpu_to_le32(major); | |
2549 | uuid_from_super1(st, uuid); | |
2550 | memcpy(bms->uuid, uuid, 16); | |
2551 | bms->chunksize = __cpu_to_le32(chunk); | |
2552 | bms->daemon_sleep = __cpu_to_le32(delay); | |
2553 | bms->sync_size = __cpu_to_le64(size); | |
2554 | bms->write_behind = __cpu_to_le32(write_behind); | |
2555 | bms->nodes = __cpu_to_le32(st->nodes); | |
2556 | if (st->nodes) | |
2557 | sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | | |
2558 | MD_FEATURE_BITMAP_VERSIONED); | |
2559 | if (st->cluster_name) { | |
2560 | len = sizeof(bms->cluster_name); | |
2561 | strncpy((char *)bms->cluster_name, st->cluster_name, len); | |
2562 | bms->cluster_name[len - 1] = '\0'; | |
2563 | } | |
2564 | ||
2565 | *chunkp = chunk; | |
2566 | return 0; | |
2567 | } | |
2568 | ||
2569 | static int locate_bitmap1(struct supertype *st, int fd, int node_num) | |
2570 | { | |
2571 | unsigned long long offset; | |
2572 | struct mdp_superblock_1 *sb; | |
2573 | int mustfree = 0; | |
2574 | int ret; | |
2575 | ||
2576 | if (!st->sb) { | |
2577 | if (st->ss->load_super(st, fd, NULL)) | |
2578 | return -1; /* no error I hope... */ | |
2579 | mustfree = 1; | |
2580 | } | |
2581 | sb = st->sb; | |
2582 | ||
2583 | if ((__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) | |
2584 | ret = 0; | |
2585 | else | |
2586 | ret = -1; | |
2587 | offset = __le64_to_cpu(sb->super_offset); | |
2588 | offset += (int32_t) __le32_to_cpu(sb->bitmap_offset) * (node_num + 1); | |
2589 | if (mustfree) | |
2590 | free(sb); | |
2591 | lseek64(fd, offset<<9, 0); | |
2592 | return ret; | |
2593 | } | |
2594 | ||
2595 | static int write_bitmap1(struct supertype *st, int fd, enum bitmap_update update) | |
2596 | { | |
2597 | struct mdp_superblock_1 *sb = st->sb; | |
2598 | bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE); | |
2599 | int rv = 0; | |
2600 | void *buf; | |
2601 | int towrite, n, len; | |
2602 | struct align_fd afd; | |
2603 | unsigned int i = 0; | |
2604 | unsigned long long total_bm_space, bm_space_per_node; | |
2605 | ||
2606 | switch (update) { | |
2607 | case NameUpdate: | |
2608 | /* update cluster name */ | |
2609 | if (st->cluster_name) { | |
2610 | len = sizeof(bms->cluster_name); | |
2611 | memset((char *)bms->cluster_name, 0, len); | |
2612 | strncpy((char *)bms->cluster_name, | |
2613 | st->cluster_name, len); | |
2614 | bms->cluster_name[len - 1] = '\0'; | |
2615 | } | |
2616 | break; | |
2617 | case NodeNumUpdate: | |
2618 | /* cluster md only supports superblock 1.2 now */ | |
2619 | if (st->minor_version != 2 && | |
2620 | bms->version == BITMAP_MAJOR_CLUSTERED) { | |
2621 | pr_err("Warning: cluster md only works with superblock 1.2\n"); | |
2622 | return -EINVAL; | |
2623 | } | |
2624 | ||
2625 | if (bms->version == BITMAP_MAJOR_CLUSTERED) { | |
2626 | if (__cpu_to_le32(st->nodes) < bms->nodes) { | |
2627 | /* | |
2628 | * Since the nodes num is not increased, no | |
2629 | * need to check the space enough or not, | |
2630 | * just update bms->nodes | |
2631 | */ | |
2632 | bms->nodes = __cpu_to_le32(st->nodes); | |
2633 | break; | |
2634 | } | |
2635 | } else { | |
2636 | /* | |
2637 | * no need to change bms->nodes for other | |
2638 | * bitmap types | |
2639 | */ | |
2640 | if (st->nodes) | |
2641 | pr_err("Warning: --nodes option is only suitable for clustered bitmap\n"); | |
2642 | break; | |
2643 | } | |
2644 | ||
2645 | /* | |
2646 | * Each node has an independent bitmap, it is necessary to | |
2647 | * calculate the space is enough or not, first get how many | |
2648 | * bytes for the total bitmap | |
2649 | */ | |
2650 | bm_space_per_node = calc_bitmap_size(bms, 4096); | |
2651 | ||
2652 | total_bm_space = 512 * (__le64_to_cpu(sb->data_offset) - | |
2653 | __le64_to_cpu(sb->super_offset)); | |
2654 | /* leave another 4k for superblock */ | |
2655 | total_bm_space = total_bm_space - 4096; | |
2656 | ||
2657 | if (bm_space_per_node * st->nodes > total_bm_space) { | |
2658 | pr_err("Warning: The max num of nodes can't exceed %llu\n", | |
2659 | total_bm_space / bm_space_per_node); | |
2660 | return -ENOMEM; | |
2661 | } | |
2662 | ||
2663 | bms->nodes = __cpu_to_le32(st->nodes); | |
2664 | break; | |
2665 | case NoUpdate: | |
2666 | default: | |
2667 | break; | |
2668 | } | |
2669 | ||
2670 | init_afd(&afd, fd); | |
2671 | ||
2672 | locate_bitmap1(st, fd, 0); | |
2673 | ||
2674 | if (posix_memalign(&buf, 4096, 4096)) | |
2675 | return -ENOMEM; | |
2676 | ||
2677 | do { | |
2678 | /* Only the bitmap[0] should resync | |
2679 | * whole device on initial assembly | |
2680 | */ | |
2681 | if (i) | |
2682 | memset(buf, 0x00, 4096); | |
2683 | else | |
2684 | memset(buf, 0xff, 4096); | |
2685 | memcpy(buf, (char *)bms, sizeof(bitmap_super_t)); | |
2686 | ||
2687 | /* | |
2688 | * use 4096 boundary if bitmap_offset is aligned | |
2689 | * with 8 sectors, then it should compatible with | |
2690 | * older mdadm. | |
2691 | */ | |
2692 | if (__le32_to_cpu(sb->bitmap_offset) & 7) | |
2693 | towrite = calc_bitmap_size(bms, 512); | |
2694 | else | |
2695 | towrite = calc_bitmap_size(bms, 4096); | |
2696 | while (towrite > 0) { | |
2697 | n = towrite; | |
2698 | if (n > 4096) | |
2699 | n = 4096; | |
2700 | n = awrite(&afd, buf, n); | |
2701 | if (n > 0) | |
2702 | towrite -= n; | |
2703 | else | |
2704 | break; | |
2705 | if (i) | |
2706 | memset(buf, 0x00, 4096); | |
2707 | else | |
2708 | memset(buf, 0xff, 4096); | |
2709 | } | |
2710 | fsync(fd); | |
2711 | if (towrite) { | |
2712 | rv = -2; | |
2713 | break; | |
2714 | } | |
2715 | } while (++i < __le32_to_cpu(bms->nodes)); | |
2716 | ||
2717 | free(buf); | |
2718 | return rv; | |
2719 | } | |
2720 | ||
2721 | static void free_super1(struct supertype *st) | |
2722 | { | |
2723 | ||
2724 | if (st->sb) | |
2725 | free(st->sb); | |
2726 | while (st->info) { | |
2727 | struct devinfo *di = st->info; | |
2728 | st->info = di->next; | |
2729 | if (di->fd >= 0) | |
2730 | close(di->fd); | |
2731 | free(di); | |
2732 | } | |
2733 | st->sb = NULL; | |
2734 | } | |
2735 | ||
2736 | static int validate_geometry1(struct supertype *st, int level, | |
2737 | int layout, int raiddisks, | |
2738 | int *chunk, unsigned long long size, | |
2739 | unsigned long long data_offset, | |
2740 | char *subdev, unsigned long long *freesize, | |
2741 | int consistency_policy, int verbose) | |
2742 | { | |
2743 | unsigned long long ldsize, devsize; | |
2744 | int bmspace; | |
2745 | unsigned long long headroom; | |
2746 | int fd; | |
2747 | ||
2748 | if (level == LEVEL_CONTAINER) { | |
2749 | if (verbose) | |
2750 | pr_err("1.x metadata does not support containers\n"); | |
2751 | return 0; | |
2752 | } | |
2753 | if (*chunk == UnSet) | |
2754 | *chunk = DEFAULT_CHUNK; | |
2755 | ||
2756 | if (!subdev) | |
2757 | return 1; | |
2758 | ||
2759 | if (st->minor_version < 0) | |
2760 | /* not specified, so time to set default */ | |
2761 | st->minor_version = 2; | |
2762 | ||
2763 | fd = open(subdev, O_RDONLY|O_EXCL, 0); | |
2764 | if (fd < 0) { | |
2765 | if (verbose) | |
2766 | pr_err("super1.x cannot open %s: %s\n", | |
2767 | subdev, strerror(errno)); | |
2768 | return 0; | |
2769 | } | |
2770 | ||
2771 | if (!get_dev_size(fd, subdev, &ldsize)) { | |
2772 | close(fd); | |
2773 | return 0; | |
2774 | } | |
2775 | close(fd); | |
2776 | ||
2777 | devsize = ldsize >> 9; | |
2778 | if (devsize < 24) { | |
2779 | *freesize = 0; | |
2780 | return 0; | |
2781 | } | |
2782 | ||
2783 | /* creating: allow suitable space for bitmap or PPL */ | |
2784 | if (consistency_policy == CONSISTENCY_POLICY_PPL) | |
2785 | bmspace = MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9; | |
2786 | else | |
2787 | bmspace = choose_bm_space(devsize); | |
2788 | ||
2789 | if (data_offset == INVALID_SECTORS) | |
2790 | data_offset = st->data_offset; | |
2791 | if (data_offset == INVALID_SECTORS) | |
2792 | switch (st->minor_version) { | |
2793 | case 0: | |
2794 | data_offset = 0; | |
2795 | break; | |
2796 | case 1: | |
2797 | case 2: | |
2798 | /* Choose data offset appropriate for this device | |
2799 | * and use as default for whole array. | |
2800 | * The data_offset must allow for bitmap space | |
2801 | * and base metadata, should allow for some headroom | |
2802 | * for reshape, and should be rounded to multiple | |
2803 | * of 1M. | |
2804 | * Headroom is limited to 128M, but aim for about 0.1% | |
2805 | */ | |
2806 | headroom = 128*1024*2; | |
2807 | while ((headroom << 10) > devsize && | |
2808 | (*chunk == 0 || | |
2809 | headroom / 2 >= ((unsigned)(*chunk)*2)*2)) | |
2810 | headroom >>= 1; | |
2811 | data_offset = 12*2 + bmspace + headroom; | |
2812 | #define ONE_MEG (2*1024) | |
2813 | data_offset = ROUND_UP(data_offset, ONE_MEG); | |
2814 | break; | |
2815 | } | |
2816 | if (st->data_offset == INVALID_SECTORS) | |
2817 | st->data_offset = data_offset; | |
2818 | switch(st->minor_version) { | |
2819 | case 0: /* metadata at end. Round down and subtract space to reserve */ | |
2820 | devsize = (devsize & ~(4ULL*2-1)); | |
2821 | /* space for metadata, bblog, bitmap/ppl */ | |
2822 | devsize -= 8*2 + 8 + bmspace; | |
2823 | break; | |
2824 | case 1: | |
2825 | case 2: | |
2826 | devsize -= data_offset; | |
2827 | break; | |
2828 | } | |
2829 | *freesize = devsize; | |
2830 | return 1; | |
2831 | } | |
2832 | ||
2833 | void *super1_make_v0(struct supertype *st, struct mdinfo *info, mdp_super_t *sb0) | |
2834 | { | |
2835 | /* Create a v1.0 superblock based on 'info'*/ | |
2836 | void *ret; | |
2837 | struct mdp_superblock_1 *sb; | |
2838 | int i; | |
2839 | unsigned long long offset; | |
2840 | ||
2841 | if (posix_memalign(&ret, 4096, 1024) != 0) | |
2842 | return NULL; | |
2843 | sb = ret; | |
2844 | memset(ret, 0, 1024); | |
2845 | sb->magic = __cpu_to_le32(MD_SB_MAGIC); | |
2846 | sb->major_version = __cpu_to_le32(1); | |
2847 | ||
2848 | copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid); | |
2849 | sprintf(sb->set_name, "%d", sb0->md_minor); | |
2850 | sb->ctime = __cpu_to_le32(info->array.ctime+1); | |
2851 | sb->level = __cpu_to_le32(info->array.level); | |
2852 | sb->layout = __cpu_to_le32(info->array.layout); | |
2853 | sb->size = __cpu_to_le64(info->component_size); | |
2854 | sb->chunksize = __cpu_to_le32(info->array.chunk_size/512); | |
2855 | sb->raid_disks = __cpu_to_le32(info->array.raid_disks); | |
2856 | if (info->array.level > 0) | |
2857 | sb->data_size = sb->size; | |
2858 | else | |
2859 | sb->data_size = st->ss->avail_size(st, st->devsize/512, 0); | |
2860 | sb->resync_offset = MaxSector; | |
2861 | sb->max_dev = __cpu_to_le32(MD_SB_DISKS); | |
2862 | sb->dev_number = __cpu_to_le32(info->disk.number); | |
2863 | sb->utime = __cpu_to_le64(info->array.utime); | |
2864 | ||
2865 | offset = st->devsize/512 - 8*2; | |
2866 | offset &= ~(4*2-1); | |
2867 | sb->super_offset = __cpu_to_le64(offset); | |
2868 | //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset); | |
2869 | ||
2870 | random_uuid(sb->device_uuid); | |
2871 | ||
2872 | for (i = 0; i < MD_SB_DISKS; i++) { | |
2873 | int state = sb0->disks[i].state; | |
2874 | sb->dev_roles[i] = MD_DISK_ROLE_SPARE; | |
2875 | if ((state & (1<<MD_DISK_SYNC)) && | |
2876 | !(state & (1<<MD_DISK_FAULTY))) | |
2877 | sb->dev_roles[i] = __cpu_to_le16(sb0->disks[i].raid_disk); | |
2878 | } | |
2879 | sb->sb_csum = calc_sb_1_csum(sb); | |
2880 | return ret; | |
2881 | } | |
2882 | ||
2883 | struct superswitch super1 = { | |
2884 | .examine_super = examine_super1, | |
2885 | .brief_examine_super = brief_examine_super1, | |
2886 | .export_examine_super = export_examine_super1, | |
2887 | .detail_super = detail_super1, | |
2888 | .brief_detail_super = brief_detail_super1, | |
2889 | .export_detail_super = export_detail_super1, | |
2890 | .write_init_super = write_init_super1, | |
2891 | .validate_geometry = validate_geometry1, | |
2892 | .add_to_super = add_to_super1, | |
2893 | .examine_badblocks = examine_badblocks_super1, | |
2894 | .copy_metadata = copy_metadata1, | |
2895 | .write_init_ppl = write_init_ppl1, | |
2896 | .match_home = match_home1, | |
2897 | .uuid_from_super = uuid_from_super1, | |
2898 | .getinfo_super = getinfo_super1, | |
2899 | .container_content = container_content1, | |
2900 | .update_super = update_super1, | |
2901 | .init_super = init_super1, | |
2902 | .store_super = store_super1, | |
2903 | .compare_super = compare_super1, | |
2904 | .load_super = load_super1, | |
2905 | .match_metadata_desc = match_metadata_desc1, | |
2906 | .avail_size = avail_size1, | |
2907 | .add_internal_bitmap = add_internal_bitmap1, | |
2908 | .locate_bitmap = locate_bitmap1, | |
2909 | .write_bitmap = write_bitmap1, | |
2910 | .free_super = free_super1, | |
2911 | #if __BYTE_ORDER == BIG_ENDIAN | |
2912 | .swapuuid = 0, | |
2913 | #else | |
2914 | .swapuuid = 1, | |
2915 | #endif | |
2916 | .name = "1.x", | |
2917 | }; |