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Add subarray field to supertype.
[thirdparty/mdadm.git] / super-intel.c
1 /*
2 * mdadm - Intel(R) Matrix Storage Manager Support
3 *
4 * Copyright (C) 2002-2007 Intel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #include "mdadm.h"
21 #include "mdmon.h"
22 #include <values.h>
23 #include <scsi/sg.h>
24 #include <ctype.h>
25
26 /* MPB == Metadata Parameter Block */
27 #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
28 #define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
29 #define MPB_VERSION_RAID0 "1.0.00"
30 #define MPB_VERSION_RAID1 "1.1.00"
31 #define MPB_VERSION_RAID5 "1.2.02"
32 #define MAX_SIGNATURE_LENGTH 32
33 #define MAX_RAID_SERIAL_LEN 16
34 #define MPB_SECTOR_CNT 418
35 #define IMSM_RESERVED_SECTORS 4096
36
37 /* Disk configuration info. */
38 #define IMSM_MAX_DEVICES 255
39 struct imsm_disk {
40 __u8 serial[MAX_RAID_SERIAL_LEN];/* 0xD8 - 0xE7 ascii serial number */
41 __u32 total_blocks; /* 0xE8 - 0xEB total blocks */
42 __u32 scsi_id; /* 0xEC - 0xEF scsi ID */
43 __u32 status; /* 0xF0 - 0xF3 */
44 #define SPARE_DISK 0x01 /* Spare */
45 #define CONFIGURED_DISK 0x02 /* Member of some RaidDev */
46 #define FAILED_DISK 0x04 /* Permanent failure */
47 #define USABLE_DISK 0x08 /* Fully usable unless FAILED_DISK is set */
48
49 #define IMSM_DISK_FILLERS 5
50 __u32 filler[IMSM_DISK_FILLERS]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
51 };
52
53 /* RAID map configuration infos. */
54 struct imsm_map {
55 __u32 pba_of_lba0; /* start address of partition */
56 __u32 blocks_per_member;/* blocks per member */
57 __u32 num_data_stripes; /* number of data stripes */
58 __u16 blocks_per_strip;
59 __u8 map_state; /* Normal, Uninitialized, Degraded, Failed */
60 #define IMSM_T_STATE_NORMAL 0
61 #define IMSM_T_STATE_UNINITIALIZED 1
62 #define IMSM_T_STATE_DEGRADED 2 /* FIXME: is this correct? */
63 #define IMSM_T_STATE_FAILED 3 /* FIXME: is this correct? */
64 __u8 raid_level;
65 #define IMSM_T_RAID0 0
66 #define IMSM_T_RAID1 1
67 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
68 __u8 num_members; /* number of member disks */
69 __u8 reserved[3];
70 __u32 filler[7]; /* expansion area */
71 __u32 disk_ord_tbl[1]; /* disk_ord_tbl[num_members],
72 top byte special */
73 } __attribute__ ((packed));
74
75 struct imsm_vol {
76 __u32 reserved[2];
77 __u8 migr_state; /* Normal or Migrating */
78 __u8 migr_type; /* Initializing, Rebuilding, ... */
79 __u8 dirty;
80 __u8 fill[1];
81 __u32 filler[5];
82 struct imsm_map map[1];
83 /* here comes another one if migr_state */
84 } __attribute__ ((packed));
85
86 struct imsm_dev {
87 __u8 volume[MAX_RAID_SERIAL_LEN];
88 __u32 size_low;
89 __u32 size_high;
90 __u32 status; /* Persistent RaidDev status */
91 __u32 reserved_blocks; /* Reserved blocks at beginning of volume */
92 #define IMSM_DEV_FILLERS 12
93 __u32 filler[IMSM_DEV_FILLERS];
94 struct imsm_vol vol;
95 } __attribute__ ((packed));
96
97 struct imsm_super {
98 __u8 sig[MAX_SIGNATURE_LENGTH]; /* 0x00 - 0x1F */
99 __u32 check_sum; /* 0x20 - 0x23 MPB Checksum */
100 __u32 mpb_size; /* 0x24 - 0x27 Size of MPB */
101 __u32 family_num; /* 0x28 - 0x2B Checksum from first time this config was written */
102 __u32 generation_num; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
103 __u32 reserved[2]; /* 0x30 - 0x37 */
104 __u8 num_disks; /* 0x38 Number of configured disks */
105 __u8 num_raid_devs; /* 0x39 Number of configured volumes */
106 __u8 fill[2]; /* 0x3A - 0x3B */
107 #define IMSM_FILLERS 39
108 __u32 filler[IMSM_FILLERS]; /* 0x3C - 0xD7 RAID_MPB_FILLERS */
109 struct imsm_disk disk[1]; /* 0xD8 diskTbl[numDisks] */
110 /* here comes imsm_dev[num_raid_devs] */
111 } __attribute__ ((packed));
112
113 #ifndef MDASSEMBLE
114 static char *map_state_str[] = { "normal", "uninitialized", "degraded", "failed" };
115 #endif
116
117 static unsigned int sector_count(__u32 bytes)
118 {
119 return ((bytes + (512-1)) & (~(512-1))) / 512;
120 }
121
122 static unsigned int mpb_sectors(struct imsm_super *mpb)
123 {
124 return sector_count(__le32_to_cpu(mpb->mpb_size));
125 }
126
127 static struct superswitch super_imsm_volume;
128
129 /* internal representation of IMSM metadata */
130 struct intel_super {
131 union {
132 struct imsm_super *mpb;
133 void *buf;
134 };
135 int updates_pending; /* count of pending updates for mdmon */
136 int creating_imsm; /* flag to indicate container creation */
137 int creating_dev; /* index of raid device undergoing creation */
138 struct dl {
139 struct dl *next;
140 int index;
141 __u8 serial[MAX_RAID_SERIAL_LEN];
142 int major, minor;
143 char *devname;
144 int fd;
145 } *disks;
146 };
147
148 struct extent {
149 unsigned long long start, size;
150 };
151
152 static struct supertype *match_metadata_desc_imsm(char *arg)
153 {
154 struct supertype *st;
155
156 if (strcmp(arg, "imsm") != 0 &&
157 strcmp(arg, "default") != 0
158 )
159 return NULL;
160
161 st = malloc(sizeof(*st));
162 memset(st, 0, sizeof(*st));
163 st->ss = &super_imsm;
164 st->max_devs = IMSM_MAX_DEVICES;
165 st->minor_version = 0;
166 st->sb = NULL;
167 return st;
168 }
169
170 static struct supertype *match_metadata_desc_imsm_volume(char *arg)
171 {
172 struct supertype *st;
173
174 if (strcmp(arg, "imsm/volume") != 0 &&
175 strcmp(arg, "raid") != 0 &&
176 strcmp(arg, "default") != 0
177 )
178 return NULL;
179
180 st = malloc(sizeof(*st));
181 memset(st, 0, sizeof(*st));
182 st->ss = &super_imsm_volume;
183 st->max_devs = IMSM_MAX_DEVICES;
184 st->minor_version = 0;
185 st->sb = NULL;
186 return st;
187 }
188
189 static __u8 *get_imsm_version(struct imsm_super *mpb)
190 {
191 return &mpb->sig[MPB_SIG_LEN];
192 }
193
194 static struct imsm_disk *get_imsm_disk(struct imsm_super *mpb, __u8 index)
195 {
196 if (index > mpb->num_disks - 1)
197 return NULL;
198 return &mpb->disk[index];
199 }
200
201 static __u32 gen_imsm_checksum(struct imsm_super *mpb)
202 {
203 __u32 end = mpb->mpb_size / sizeof(end);
204 __u32 *p = (__u32 *) mpb;
205 __u32 sum = 0;
206
207 while (end--)
208 sum += __le32_to_cpu(*p++);
209
210 return sum - __le32_to_cpu(mpb->check_sum);
211 }
212
213 static size_t sizeof_imsm_dev(struct imsm_dev *dev)
214 {
215 size_t size = sizeof(*dev);
216
217 /* each map has disk_ord_tbl[num_members - 1] additional space */
218 size += sizeof(__u32) * (dev->vol.map[0].num_members - 1);
219
220 /* migrating means an additional map */
221 if (dev->vol.migr_state) {
222 size += sizeof(struct imsm_map);
223 size += sizeof(__u32) * (dev->vol.map[1].num_members - 1);
224 }
225
226 return size;
227 }
228
229 static struct imsm_dev *get_imsm_dev(struct imsm_super *mpb, __u8 index)
230 {
231 int offset;
232 int i;
233 void *_mpb = mpb;
234
235 if (index > mpb->num_raid_devs - 1)
236 return NULL;
237
238 /* devices start after all disks */
239 offset = ((void *) &mpb->disk[mpb->num_disks]) - _mpb;
240
241 for (i = 0; i <= index; i++)
242 if (i == index)
243 return _mpb + offset;
244 else
245 offset += sizeof_imsm_dev(_mpb + offset);
246
247 return NULL;
248 }
249
250 static __u32 get_imsm_disk_idx(struct imsm_map *map, int slot)
251 {
252 __u32 *ord_tbl = &map->disk_ord_tbl[slot];
253
254 /* top byte is 'special' */
255 return __le32_to_cpu(*ord_tbl & ~(0xff << 24));
256 }
257
258 static int get_imsm_raid_level(struct imsm_map *map)
259 {
260 if (map->raid_level == 1) {
261 if (map->num_members == 2)
262 return 1;
263 else
264 return 10;
265 }
266
267 return map->raid_level;
268 }
269
270 static int cmp_extent(const void *av, const void *bv)
271 {
272 const struct extent *a = av;
273 const struct extent *b = bv;
274 if (a->start < b->start)
275 return -1;
276 if (a->start > b->start)
277 return 1;
278 return 0;
279 }
280
281 static struct extent *get_extents(struct intel_super *super, struct dl *dl)
282 {
283 /* find a list of used extents on the given physical device */
284 struct imsm_super *mpb = super->mpb;
285 struct imsm_disk *disk;
286 struct extent *rv, *e;
287 int i, j;
288 int memberships = 0;
289
290 disk = get_imsm_disk(mpb, dl->index);
291 if (!disk)
292 return NULL;
293
294 for (i = 0; i < mpb->num_raid_devs; i++) {
295 struct imsm_dev *dev = get_imsm_dev(mpb, i);
296 struct imsm_map *map = dev->vol.map;
297
298 for (j = 0; j < map->num_members; j++) {
299 __u32 index = get_imsm_disk_idx(map, j);
300
301 if (index == dl->index)
302 memberships++;
303 }
304 }
305 rv = malloc(sizeof(struct extent) * (memberships + 1));
306 if (!rv)
307 return NULL;
308 e = rv;
309
310 for (i = 0; i < mpb->num_raid_devs; i++) {
311 struct imsm_dev *dev = get_imsm_dev(mpb, i);
312 struct imsm_map *map = dev->vol.map;
313
314 for (j = 0; j < map->num_members; j++) {
315 __u32 index = get_imsm_disk_idx(map, j);
316
317 if (index == dl->index) {
318 e->start = __le32_to_cpu(map->pba_of_lba0);
319 e->size = __le32_to_cpu(map->blocks_per_member);
320 e++;
321 }
322 }
323 }
324 qsort(rv, memberships, sizeof(*rv), cmp_extent);
325
326 e->start = __le32_to_cpu(disk->total_blocks) -
327 (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
328 e->size = 0;
329 return rv;
330 }
331
332 #ifndef MDASSEMBLE
333 static void print_imsm_dev(struct imsm_dev *dev, int index)
334 {
335 __u64 sz;
336 int slot;
337 struct imsm_map *map = dev->vol.map;
338
339 printf("\n");
340 printf("[%s]:\n", dev->volume);
341 printf(" RAID Level : %d\n", get_imsm_raid_level(map));
342 printf(" Members : %d\n", map->num_members);
343 for (slot = 0; slot < map->num_members; slot++)
344 if (index == get_imsm_disk_idx(map, slot))
345 break;
346 if (slot < map->num_members)
347 printf(" This Slot : %d\n", slot);
348 else
349 printf(" This Slot : ?\n");
350 sz = __le32_to_cpu(dev->size_high);
351 sz <<= 32;
352 sz += __le32_to_cpu(dev->size_low);
353 printf(" Array Size : %llu%s\n", (unsigned long long)sz,
354 human_size(sz * 512));
355 sz = __le32_to_cpu(map->blocks_per_member);
356 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz,
357 human_size(sz * 512));
358 printf(" Sector Offset : %u\n",
359 __le32_to_cpu(map->pba_of_lba0));
360 printf(" Num Stripes : %u\n",
361 __le32_to_cpu(map->num_data_stripes));
362 printf(" Chunk Size : %u KiB\n",
363 __le16_to_cpu(map->blocks_per_strip) / 2);
364 printf(" Reserved : %d\n", __le32_to_cpu(dev->reserved_blocks));
365 printf(" Migrate State : %s\n", dev->vol.migr_state ? "migrating" : "idle");
366 printf(" Dirty State : %s\n", dev->vol.dirty ? "dirty" : "clean");
367 printf(" Map State : %s\n", map_state_str[map->map_state]);
368 }
369
370 static void print_imsm_disk(struct imsm_super *mpb, int index)
371 {
372 struct imsm_disk *disk = get_imsm_disk(mpb, index);
373 char str[MAX_RAID_SERIAL_LEN];
374 __u32 s;
375 __u64 sz;
376
377 printf("\n");
378 snprintf(str, MAX_RAID_SERIAL_LEN, "%s", disk->serial);
379 printf(" Disk%02d Serial : %s\n", index, str);
380 s = __le32_to_cpu(disk->status);
381 printf(" State :%s%s%s%s\n", s&SPARE_DISK ? " spare" : "",
382 s&CONFIGURED_DISK ? " active" : "",
383 s&FAILED_DISK ? " failed" : "",
384 s&USABLE_DISK ? " usable" : "");
385 printf(" Id : %08x\n", __le32_to_cpu(disk->scsi_id));
386 sz = __le32_to_cpu(disk->total_blocks) -
387 (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS * mpb->num_raid_devs);
388 printf(" Usable Size : %llu%s\n", (unsigned long long)sz,
389 human_size(sz * 512));
390 }
391
392 static void examine_super_imsm(struct supertype *st, char *homehost)
393 {
394 struct intel_super *super = st->sb;
395 struct imsm_super *mpb = super->mpb;
396 char str[MAX_SIGNATURE_LENGTH];
397 int i;
398 __u32 sum;
399
400 snprintf(str, MPB_SIG_LEN, "%s", mpb->sig);
401 printf(" Magic : %s\n", str);
402 snprintf(str, strlen(MPB_VERSION_RAID0), "%s", get_imsm_version(mpb));
403 printf(" Version : %s\n", get_imsm_version(mpb));
404 printf(" Family : %08x\n", __le32_to_cpu(mpb->family_num));
405 printf(" Generation : %08x\n", __le32_to_cpu(mpb->generation_num));
406 sum = __le32_to_cpu(mpb->check_sum);
407 printf(" Checksum : %08x %s\n", sum,
408 gen_imsm_checksum(mpb) == sum ? "correct" : "incorrect");
409 printf(" MPB Sectors : %d\n", mpb_sectors(mpb));
410 printf(" Disks : %d\n", mpb->num_disks);
411 printf(" RAID Devices : %d\n", mpb->num_raid_devs);
412 print_imsm_disk(mpb, super->disks->index);
413 for (i = 0; i < mpb->num_raid_devs; i++)
414 print_imsm_dev(get_imsm_dev(mpb, i), super->disks->index);
415 for (i = 0; i < mpb->num_disks; i++) {
416 if (i == super->disks->index)
417 continue;
418 print_imsm_disk(mpb, i);
419 }
420 }
421
422 static void brief_examine_super_imsm(struct supertype *st)
423 {
424 struct intel_super *super = st->sb;
425 struct imsm_super *mpb = super->mpb;
426
427 printf("ARRAY /dev/imsm family=%08x metadata=external:imsm\n",
428 __le32_to_cpu(mpb->family_num));
429 }
430
431 static void detail_super_imsm(struct supertype *st, char *homehost)
432 {
433 printf("%s\n", __FUNCTION__);
434 }
435
436 static void brief_detail_super_imsm(struct supertype *st)
437 {
438 printf("%s\n", __FUNCTION__);
439 }
440 #endif
441
442 static int match_home_imsm(struct supertype *st, char *homehost)
443 {
444 printf("%s\n", __FUNCTION__);
445
446 return 0;
447 }
448
449 static void uuid_from_super_imsm(struct supertype *st, int uuid[4])
450 {
451 printf("%s\n", __FUNCTION__);
452 }
453
454 static void
455 get_imsm_numerical_version(struct imsm_super *mpb, int *m, int *p)
456 {
457 __u8 *v = get_imsm_version(mpb);
458 __u8 *end = mpb->sig + MAX_SIGNATURE_LENGTH;
459 char major[] = { 0, 0, 0 };
460 char minor[] = { 0 ,0, 0 };
461 char patch[] = { 0, 0, 0 };
462 char *ver_parse[] = { major, minor, patch };
463 int i, j;
464
465 i = j = 0;
466 while (*v != '\0' && v < end) {
467 if (*v != '.' && j < 2)
468 ver_parse[i][j++] = *v;
469 else {
470 i++;
471 j = 0;
472 }
473 v++;
474 }
475
476 *m = strtol(minor, NULL, 0);
477 *p = strtol(patch, NULL, 0);
478 }
479
480 static int imsm_level_to_layout(int level)
481 {
482 switch (level) {
483 case 0:
484 case 1:
485 return 0;
486 case 5:
487 case 6:
488 return ALGORITHM_LEFT_SYMMETRIC;
489 case 10:
490 return 0x102; //FIXME is this correct?
491 }
492 return -1;
493 }
494
495 static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info)
496 {
497 struct intel_super *super = st->sb;
498 struct imsm_super *mpb = super->mpb;
499 struct imsm_disk *disk;
500 __u32 s;
501
502 info->array.major_version = 2000;
503 get_imsm_numerical_version(mpb, &info->array.minor_version,
504 &info->array.patch_version);
505 info->array.raid_disks = mpb->num_disks;
506 info->array.level = LEVEL_CONTAINER;
507 info->array.layout = 0;
508 info->array.md_minor = -1;
509 info->array.ctime = 0; /* N/A for imsm */
510 info->array.utime = 0;
511 info->array.chunk_size = 0;
512
513 info->disk.major = 0;
514 info->disk.minor = 0;
515 info->disk.raid_disk = -1;
516 info->reshape_active = 0;
517 strcpy(info->text_version, "imsm");
518 info->disk.number = -1;
519 info->disk.state = 0;
520
521 if (super->disks) {
522 info->disk.number = super->disks->index;
523 info->disk.raid_disk = super->disks->index;
524 disk = get_imsm_disk(mpb, super->disks->index);
525 s = __le32_to_cpu(disk->status);
526 info->disk.state = s & CONFIGURED_DISK ? (1 << MD_DISK_ACTIVE) : 0;
527 info->disk.state |= s & FAILED_DISK ? (1 << MD_DISK_FAULTY) : 0;
528 info->disk.state |= s & USABLE_DISK ? (1 << MD_DISK_SYNC) : 0;
529 }
530 }
531
532 static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info)
533 {
534 struct intel_super *super = st->sb;
535 struct imsm_super *mpb = super->mpb;
536 struct imsm_dev *dev = get_imsm_dev(mpb, info->container_member);
537 struct imsm_map *map = &dev->vol.map[0];
538
539 info->array.major_version = 2000;
540 get_imsm_numerical_version(mpb, &info->array.minor_version,
541 &info->array.patch_version);
542 info->array.raid_disks = map->num_members;
543 info->array.level = get_imsm_raid_level(map);
544 info->array.layout = imsm_level_to_layout(info->array.level);
545 info->array.md_minor = -1;
546 info->array.ctime = 0;
547 info->array.utime = 0;
548 info->array.chunk_size = __le16_to_cpu(map->blocks_per_strip * 512);
549
550 info->data_offset = __le32_to_cpu(map->pba_of_lba0);
551 info->component_size = __le32_to_cpu(map->blocks_per_member);
552
553 info->disk.major = 0;
554 info->disk.minor = 0;
555
556 sprintf(info->text_version, "/%s/%d",
557 devnum2devname(st->container_dev),
558 info->container_member);
559 }
560
561 static int update_super_imsm(struct supertype *st, struct mdinfo *info,
562 char *update, char *devname, int verbose,
563 int uuid_set, char *homehost)
564 {
565 /* FIXME */
566
567 /* For 'assemble' and 'force' we need to return non-zero if any
568 * change was made. For others, the return value is ignored.
569 * Update options are:
570 * force-one : This device looks a bit old but needs to be included,
571 * update age info appropriately.
572 * assemble: clear any 'faulty' flag to allow this device to
573 * be assembled.
574 * force-array: Array is degraded but being forced, mark it clean
575 * if that will be needed to assemble it.
576 *
577 * newdev: not used ????
578 * grow: Array has gained a new device - this is currently for
579 * linear only
580 * resync: mark as dirty so a resync will happen.
581 * name: update the name - preserving the homehost
582 *
583 * Following are not relevant for this imsm:
584 * sparc2.2 : update from old dodgey metadata
585 * super-minor: change the preferred_minor number
586 * summaries: update redundant counters.
587 * uuid: Change the uuid of the array to match watch is given
588 * homehost: update the recorded homehost
589 * _reshape_progress: record new reshape_progress position.
590 */
591 int rv = 0;
592 //struct intel_super *super = st->sb;
593 //struct imsm_super *mpb = super->mpb;
594
595 if (strcmp(update, "grow") == 0) {
596 }
597 if (strcmp(update, "resync") == 0) {
598 /* dev->vol.dirty = 1; */
599 }
600
601 /* IMSM has no concept of UUID or homehost */
602
603 return rv;
604 }
605
606 static size_t disks_to_mpb_size(int disks)
607 {
608 size_t size;
609
610 size = sizeof(struct imsm_super);
611 size += (disks - 1) * sizeof(struct imsm_disk);
612 size += 2 * sizeof(struct imsm_dev);
613 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
614 size += (4 - 2) * sizeof(struct imsm_map);
615 /* 4 possible disk_ord_tbl's */
616 size += 4 * (disks - 1) * sizeof(__u32);
617
618 return size;
619 }
620
621 static __u64 avail_size_imsm(struct supertype *st, __u64 devsize)
622 {
623 if (devsize < (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS))
624 return 0;
625
626 return devsize - (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
627 }
628
629 static int compare_super_imsm(struct supertype *st, struct supertype *tst)
630 {
631 /*
632 * return:
633 * 0 same, or first was empty, and second was copied
634 * 1 second had wrong number
635 * 2 wrong uuid
636 * 3 wrong other info
637 */
638 struct intel_super *first = st->sb;
639 struct intel_super *sec = tst->sb;
640
641 if (!first) {
642 st->sb = tst->sb;
643 tst->sb = NULL;
644 return 0;
645 }
646
647 if (memcmp(first->mpb->sig, sec->mpb->sig, MAX_SIGNATURE_LENGTH) != 0)
648 return 3;
649 if (first->mpb->family_num != sec->mpb->family_num)
650 return 3;
651 if (first->mpb->mpb_size != sec->mpb->mpb_size)
652 return 3;
653 if (first->mpb->check_sum != sec->mpb->check_sum)
654 return 3;
655
656 return 0;
657 }
658
659 extern int scsi_get_serial(int fd, void *buf, size_t buf_len);
660
661 static int imsm_read_serial(int fd, char *devname,
662 __u8 serial[MAX_RAID_SERIAL_LEN])
663 {
664 unsigned char scsi_serial[255];
665 int sg_fd;
666 int rv;
667 int rsp_len;
668 int i, cnt;
669
670 memset(scsi_serial, 0, sizeof(scsi_serial));
671
672 sg_fd = sysfs_disk_to_sg(fd);
673 if (sg_fd < 0) {
674 if (devname)
675 fprintf(stderr,
676 Name ": Failed to open sg interface for %s: %s\n",
677 devname, strerror(errno));
678 return 1;
679 }
680
681 rv = scsi_get_serial(sg_fd, scsi_serial, sizeof(scsi_serial));
682 close(sg_fd);
683
684 if (rv != 0) {
685 if (devname)
686 fprintf(stderr,
687 Name ": Failed to retrieve serial for %s\n",
688 devname);
689 return rv;
690 }
691
692 rsp_len = scsi_serial[3];
693 for (i = 0, cnt = 0; i < rsp_len; i++) {
694 if (!isspace(scsi_serial[4 + i]))
695 serial[cnt++] = scsi_serial[4 + i];
696 if (cnt == MAX_RAID_SERIAL_LEN)
697 break;
698 }
699
700 serial[MAX_RAID_SERIAL_LEN - 1] = '\0';
701
702 return 0;
703 }
704
705 static int
706 load_imsm_disk(int fd, struct intel_super *super, char *devname, int keep_fd)
707 {
708 struct imsm_super *mpb = super->mpb;
709 struct dl *dl;
710 struct stat stb;
711 struct imsm_disk *disk;
712 int rv;
713 int i;
714
715 dl = malloc(sizeof(*dl));
716 if (!dl) {
717 if (devname)
718 fprintf(stderr,
719 Name ": failed to allocate disk buffer for %s\n",
720 devname);
721 return 2;
722 }
723 memset(dl, 0, sizeof(*dl));
724
725 fstat(fd, &stb);
726 dl->major = major(stb.st_rdev);
727 dl->minor = minor(stb.st_rdev);
728 dl->next = super->disks;
729 dl->fd = keep_fd ? fd : -1;
730 dl->devname = devname ? strdup(devname) : NULL;
731 dl->index = -1;
732 super->disks = dl;
733 rv = imsm_read_serial(fd, devname, dl->serial);
734
735 if (rv != 0)
736 return 2;
737
738 /* look up this disk's index */
739 for (i = 0; i < mpb->num_disks; i++) {
740 disk = get_imsm_disk(mpb, i);
741
742 if (memcmp(disk->serial, dl->serial, MAX_RAID_SERIAL_LEN) == 0)
743 break;
744 }
745
746 if (i > mpb->num_disks)
747 return 2;
748
749 dl->index = i;
750
751 return 0;
752 }
753
754 /* load_imsm_mpb - read matrix metadata
755 * allocates super->mpb to be freed by free_super
756 */
757 static int load_imsm_mpb(int fd, struct intel_super *super, char *devname)
758 {
759 unsigned long long dsize;
760 size_t len, mpb_size;
761 unsigned long long sectors;
762 struct stat;
763 struct imsm_super anchor;
764 __u32 check_sum;
765
766 memset(super, 0, sizeof(*super));
767 get_dev_size(fd, NULL, &dsize);
768
769 if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) {
770 if (devname)
771 fprintf(stderr,
772 Name ": Cannot seek to anchor block on %s: %s\n",
773 devname, strerror(errno));
774 return 1;
775 }
776
777 len = sizeof(anchor);
778 if (read(fd, &anchor, len) != len) {
779 if (devname)
780 fprintf(stderr,
781 Name ": Cannot read anchor block on %s: %s\n",
782 devname, strerror(errno));
783 return 1;
784 }
785
786 if (strncmp((char *) anchor.sig, MPB_SIGNATURE, MPB_SIG_LEN) != 0) {
787 if (devname)
788 fprintf(stderr,
789 Name ": no IMSM anchor on %s\n", devname);
790 return 2;
791 }
792
793 mpb_size = __le32_to_cpu(anchor.mpb_size);
794 super->mpb = malloc(mpb_size < 512 ? 512 : mpb_size);
795 if (!super->mpb) {
796 if (devname)
797 fprintf(stderr,
798 Name ": unable to allocate %zu byte mpb buffer\n",
799 mpb_size);
800 return 2;
801 }
802 memcpy(super->buf, &anchor, sizeof(anchor));
803
804 /* read the rest of the first block */
805 len = 512 - sizeof(anchor);
806 if (read(fd, super->buf + sizeof(anchor), len) != len) {
807 if (devname)
808 fprintf(stderr,
809 Name ": Cannot read anchor remainder on %s: %s\n",
810 devname, strerror(errno));
811 return 2;
812 }
813
814 sectors = mpb_sectors(&anchor) - 1;
815 if (!sectors)
816 return load_imsm_disk(fd, super, devname, 0);
817
818 /* read the extended mpb */
819 if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0) {
820 if (devname)
821 fprintf(stderr,
822 Name ": Cannot seek to extended mpb on %s: %s\n",
823 devname, strerror(errno));
824 return 1;
825 }
826
827 len = mpb_size - 512;
828 if (read(fd, super->buf + 512, len) != len) {
829 if (devname)
830 fprintf(stderr,
831 Name ": Cannot read extended mpb on %s: %s\n",
832 devname, strerror(errno));
833 return 2;
834 }
835
836 check_sum = gen_imsm_checksum(super->mpb);
837 if (check_sum != __le32_to_cpu(super->mpb->check_sum)) {
838 if (devname)
839 fprintf(stderr,
840 Name ": IMSM checksum %x != %x on %s\n",
841 check_sum, __le32_to_cpu(super->mpb->check_sum),
842 devname);
843 return 2;
844 }
845
846 return load_imsm_disk(fd, super, devname, 0);
847 }
848
849 struct superswitch super_imsm_container;
850
851 static void free_imsm_disks(struct intel_super *super)
852 {
853 while (super->disks) {
854 struct dl *d = super->disks;
855
856 super->disks = d->next;
857 if (d->fd >= 0)
858 close(d->fd);
859 if (d->devname)
860 free(d->devname);
861 free(d);
862 }
863 }
864
865 static void free_imsm(struct intel_super *super)
866 {
867 if (super->mpb)
868 free(super->mpb);
869 free_imsm_disks(super);
870 free(super);
871 }
872
873
874 static void free_super_imsm(struct supertype *st)
875 {
876 struct intel_super *super = st->sb;
877
878 if (!super)
879 return;
880
881 free_imsm(super);
882 st->sb = NULL;
883 }
884
885 static struct intel_super *alloc_super(int creating_imsm)
886 {
887 struct intel_super *super = malloc(sizeof(*super));
888
889 if (super) {
890 memset(super, 0, sizeof(*super));
891 super->creating_imsm = creating_imsm;
892 super->creating_dev = -1;
893 }
894
895 return super;
896 }
897
898 #ifndef MDASSEMBLE
899 static int load_super_imsm_all(struct supertype *st, int fd, void **sbp,
900 char *devname, int keep_fd)
901 {
902 struct mdinfo *sra;
903 struct intel_super *super;
904 struct mdinfo *sd, *best = NULL;
905 __u32 bestgen = 0;
906 __u32 gen;
907 char nm[20];
908 int dfd;
909 int rv;
910
911 /* check if this disk is a member of an active array */
912 sra = sysfs_read(fd, 0, GET_LEVEL|GET_VERSION|GET_DEVS|GET_STATE);
913 if (!sra)
914 return 1;
915
916 if (sra->array.major_version != -1 ||
917 sra->array.minor_version != -2 ||
918 strcmp(sra->text_version, "imsm") != 0)
919 return 1;
920
921 super = alloc_super(0);
922 if (!super)
923 return 1;
924
925 /* find the most up to date disk in this array */
926 for (sd = sra->devs; sd; sd = sd->next) {
927 sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
928 dfd = dev_open(nm, keep_fd ? O_RDWR : O_RDONLY);
929 if (!dfd) {
930 free_imsm(super);
931 return 2;
932 }
933 rv = load_imsm_mpb(dfd, super, NULL);
934 if (!keep_fd)
935 close(dfd);
936 if (rv == 0) {
937 gen = __le32_to_cpu(super->mpb->generation_num);
938 if (!best || gen > bestgen) {
939 bestgen = gen;
940 best = sd;
941 }
942 } else {
943 free_imsm(super);
944 return 2;
945 }
946 }
947
948 if (!best) {
949 free_imsm(super);
950 return 1;
951 }
952
953 /* load the most up to date anchor */
954 sprintf(nm, "%d:%d", best->disk.major, best->disk.minor);
955 dfd = dev_open(nm, O_RDONLY);
956 if (!dfd) {
957 free_imsm(super);
958 return 1;
959 }
960 rv = load_imsm_mpb(dfd, super, NULL);
961 close(dfd);
962 if (rv != 0) {
963 free_imsm(super);
964 return 2;
965 }
966
967 /* reset the disk list */
968 free_imsm_disks(super);
969
970 /* populate disk list */
971 for (sd = sra->devs ; sd ; sd = sd->next) {
972 sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
973 dfd = dev_open(nm, keep_fd? O_RDWR : O_RDONLY);
974 if (!dfd) {
975 free_imsm(super);
976 return 2;
977 }
978 load_imsm_disk(dfd, super, NULL, keep_fd);
979 if (!keep_fd)
980 close(dfd);
981 }
982
983 if (st->subarray[0]) {
984 /* FIXME */
985 }
986
987 *sbp = super;
988 if (st->ss == NULL) {
989 st->ss = &super_imsm_container;
990 st->minor_version = 0;
991 st->max_devs = IMSM_MAX_DEVICES;
992 st->container_dev = fd2devnum(fd);
993 }
994
995 return 0;
996 }
997 #endif
998
999 static int load_super_imsm(struct supertype *st, int fd, char *devname)
1000 {
1001 struct intel_super *super;
1002 int rv;
1003
1004 #ifndef MDASSEMBLE
1005 if (load_super_imsm_all(st, fd, &st->sb, devname, 1) == 0)
1006 return 0;
1007 #endif
1008 if (st->subarray[0])
1009 return 1; /* FIXME */
1010
1011 super = alloc_super(0);
1012 if (!super) {
1013 fprintf(stderr,
1014 Name ": malloc of %zu failed.\n",
1015 sizeof(*super));
1016 return 1;
1017 }
1018
1019 rv = load_imsm_mpb(fd, super, devname);
1020
1021 if (rv) {
1022 if (devname)
1023 fprintf(stderr,
1024 Name ": Failed to load all information "
1025 "sections on %s\n", devname);
1026 free_imsm(super);
1027 return rv;
1028 }
1029
1030 st->sb = super;
1031 if (st->ss == NULL) {
1032 st->ss = &super_imsm;
1033 st->minor_version = 0;
1034 st->max_devs = IMSM_MAX_DEVICES;
1035 }
1036
1037 return 0;
1038 }
1039
1040 static int init_zero_imsm(struct supertype *st, mdu_array_info_t *info,
1041 unsigned long long size, char *name,
1042 char *homehost, int *uuid)
1043 {
1044 st->sb = NULL;
1045 return 0;
1046 }
1047
1048 static int init_super_imsm(struct supertype *st, mdu_array_info_t *info,
1049 unsigned long long size, char *name,
1050 char *homehost, int *uuid)
1051 {
1052 /* This is primarily called by Create when creating a new array.
1053 * We will then get add_to_super called for each component, and then
1054 * write_init_super called to write it out to each device.
1055 * For IMSM, Create can create on fresh devices or on a pre-existing
1056 * array.
1057 * To create on a pre-existing array a different method will be called.
1058 * This one is just for fresh drives.
1059 */
1060 struct intel_super *super;
1061 struct imsm_super *mpb;
1062 size_t mpb_size;
1063
1064 super = alloc_super(1);
1065 if (!super)
1066 return 0;
1067 mpb_size = disks_to_mpb_size(info->nr_disks);
1068 mpb = malloc(mpb_size);
1069 if (!mpb) {
1070 free(super);
1071 return 0;
1072 }
1073 memset(mpb, 0, mpb_size);
1074
1075 memcpy(mpb->sig, MPB_SIGNATURE, strlen(MPB_SIGNATURE));
1076 memcpy(mpb->sig + strlen(MPB_SIGNATURE), MPB_VERSION_RAID5,
1077 strlen(MPB_VERSION_RAID5));
1078 mpb->mpb_size = mpb_size;
1079
1080 super->mpb = mpb;
1081 st->sb = super;
1082 return 1;
1083 }
1084
1085 static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info,
1086 unsigned long long size, char *name,
1087 char *homehost, int *uuid)
1088 {
1089 /* We are creating a volume inside a pre-existing container.
1090 * so st->sb is already set.
1091 */
1092 struct intel_super *super = st->sb;
1093 struct imsm_super *mpb = super->mpb;
1094 struct imsm_dev *dev;
1095 struct imsm_vol *vol;
1096 struct imsm_map *map;
1097 int idx = mpb->num_raid_devs;
1098 int i;
1099 unsigned long long array_blocks;
1100 unsigned long long sz;
1101 __u32 offset = 0;
1102
1103 if (mpb->num_raid_devs >= 2) {
1104 fprintf(stderr, Name": This imsm-container already has the "
1105 "maximum of 2 volumes\n");
1106 return 0;
1107 }
1108
1109 super->creating_dev = idx;
1110 mpb->num_raid_devs++;
1111 dev = get_imsm_dev(mpb, idx);
1112 strncpy((char *) dev->volume, name, MAX_RAID_SERIAL_LEN);
1113 array_blocks = calc_array_size(info->level, info->raid_disks,
1114 info->layout, info->chunk_size,
1115 info->size*2);
1116 dev->size_low = __cpu_to_le32((__u32) array_blocks);
1117 dev->size_high = __cpu_to_le32((__u32) (array_blocks >> 32));
1118 dev->status = __cpu_to_le32(0);
1119 dev->reserved_blocks = __cpu_to_le32(0);
1120 vol = &dev->vol;
1121 vol->migr_state = 0;
1122 vol->migr_type = 0;
1123 vol->dirty = 0;
1124 for (i = 0; i < idx; i++) {
1125 struct imsm_dev *prev = get_imsm_dev(mpb, i);
1126 struct imsm_map *pmap = &prev->vol.map[0];
1127
1128 offset += __le32_to_cpu(pmap->blocks_per_member);
1129 offset += IMSM_RESERVED_SECTORS;
1130 }
1131 map = &vol->map[0];
1132 map->pba_of_lba0 = __cpu_to_le32(offset);
1133 sz = info->size * 2;
1134 map->blocks_per_member = __cpu_to_le32(sz);
1135 map->blocks_per_strip = __cpu_to_le16(info->chunk_size >> 9);
1136 map->num_data_stripes = __cpu_to_le32(sz / (info->chunk_size >> 9));
1137 map->map_state = info->level ? IMSM_T_STATE_UNINITIALIZED :
1138 IMSM_T_STATE_NORMAL;
1139 if (info->level == 10)
1140 map->raid_level = 1;
1141 else
1142 map->raid_level = info->level;
1143 map->num_members = info->raid_disks;
1144 for (i = 0; i < map->num_members; i++) {
1145 /* initialized in add_to_super */
1146 map->disk_ord_tbl[i] = __cpu_to_le32(0);
1147 }
1148
1149 return 1;
1150 }
1151
1152 static void add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk,
1153 int fd, char *devname)
1154 {
1155 struct intel_super *super = st->sb;
1156 struct imsm_super *mpb = super->mpb;
1157 struct imsm_disk *disk;
1158 struct dl *dd;
1159 unsigned long long size;
1160 __u32 status, id;
1161 int rv;
1162 struct stat stb;
1163
1164 fstat(fd, &stb);
1165 dd = malloc(sizeof(*dd));
1166 if (!dd) {
1167 fprintf(stderr,
1168 Name ": malloc failed %s:%d.\n", __func__, __LINE__);
1169 abort();
1170 }
1171 memset(dd, 0, sizeof(*dd));
1172 dd->major = major(stb.st_rdev);
1173 dd->minor = minor(stb.st_rdev);
1174 dd->index = dk->number;
1175 dd->devname = devname ? strdup(devname) : NULL;
1176 dd->next = super->disks;
1177 dd->fd = fd;
1178 rv = imsm_read_serial(fd, devname, dd->serial);
1179 if (rv) {
1180 fprintf(stderr,
1181 Name ": failed to retrieve scsi serial "
1182 "using \'%s\' instead\n", devname);
1183 strcpy((char *) dd->serial, devname);
1184 }
1185
1186 if (mpb->num_disks <= dk->number)
1187 mpb->num_disks = dk->number + 1;
1188
1189 disk = get_imsm_disk(mpb, dk->number);
1190 get_dev_size(fd, NULL, &size);
1191 size /= 512;
1192 status = USABLE_DISK | SPARE_DISK;
1193 strcpy((char *) disk->serial, (char *) dd->serial);
1194 disk->total_blocks = __cpu_to_le32(size);
1195 disk->status = __cpu_to_le32(status);
1196 if (sysfs_disk_to_scsi_id(fd, &id) == 0)
1197 disk->scsi_id = __cpu_to_le32(id);
1198 else
1199 disk->scsi_id = __cpu_to_le32(0);
1200
1201 /* update the family number if we are creating a container */
1202 if (super->creating_imsm)
1203 mpb->family_num = __cpu_to_le32(gen_imsm_checksum(mpb));
1204
1205 super->disks = dd;
1206 }
1207
1208 static void add_to_super_imsm_volume(struct supertype *st, mdu_disk_info_t *dk,
1209 int fd, char *devname)
1210 {
1211 struct intel_super *super = st->sb;
1212 struct imsm_super *mpb = super->mpb;
1213 struct dl *dl;
1214 struct imsm_dev *dev;
1215 struct imsm_map *map;
1216 struct imsm_disk *disk;
1217 __u32 status;
1218
1219 if (super->creating_dev == -1) {
1220 fprintf(stderr, Name ": no active raid device\n");
1221 abort();
1222 }
1223
1224 dev = get_imsm_dev(mpb, super->creating_dev);
1225 map = &dev->vol.map[0];
1226
1227 for (dl = super->disks; dl ; dl = dl->next)
1228 if (dl->major == dk->major &&
1229 dl->minor == dk->minor)
1230 break;
1231 if (!dl || ! (dk->state & (1<<MD_DISK_SYNC)))
1232 return;
1233
1234 map->disk_ord_tbl[dk->number] = __cpu_to_le32(dl->index);
1235
1236 disk = get_imsm_disk(mpb, dl->index);
1237 status = CONFIGURED_DISK | USABLE_DISK;
1238 disk->status = __cpu_to_le32(status);
1239 }
1240
1241 static int store_imsm_mpb(int fd, struct intel_super *super);
1242
1243 static int write_super_imsm(struct intel_super *super, int doclose)
1244 {
1245 struct imsm_super *mpb = super->mpb;
1246 struct dl *d;
1247 __u32 generation;
1248 __u32 sum;
1249
1250 /* 'generation' is incremented everytime the metadata is written */
1251 generation = __le32_to_cpu(mpb->generation_num);
1252 generation++;
1253 mpb->generation_num = __cpu_to_le32(generation);
1254
1255 /* recalculate checksum */
1256 sum = gen_imsm_checksum(mpb);
1257 mpb->check_sum = __cpu_to_le32(sum);
1258
1259 for (d = super->disks; d ; d = d->next) {
1260 if (store_imsm_mpb(d->fd, super)) {
1261 fprintf(stderr, "%s: failed for device %d:%d %s\n",
1262 __func__, d->major, d->minor, strerror(errno));
1263 return 0;
1264 }
1265 if (doclose) {
1266 close(d->fd);
1267 d->fd = -1;
1268 }
1269 }
1270
1271 return 1;
1272 }
1273
1274 static int write_init_super_imsm(struct supertype *st)
1275 {
1276 return write_super_imsm(st->sb, 1);
1277 }
1278
1279 static int store_zero_imsm(struct supertype *st, int fd)
1280 {
1281 unsigned long long dsize;
1282 char buf[512];
1283
1284 get_dev_size(fd, NULL, &dsize);
1285
1286 /* first block is stored on second to last sector of the disk */
1287 if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
1288 return 1;
1289
1290 memset(buf, 0, sizeof(buf));
1291 if (write(fd, buf, sizeof(buf)) != sizeof(buf))
1292 return 1;
1293
1294 return 0;
1295 }
1296
1297 static void getinfo_super_n_imsm_container(struct supertype *st, struct mdinfo *info)
1298 {
1299 /* just need offset and size...
1300 * of the metadata
1301 */
1302 struct intel_super *super = st->sb;
1303 struct imsm_super *mpb = super->mpb;
1304 struct imsm_disk *disk = get_imsm_disk(mpb, info->disk.number);
1305
1306 info->data_offset = __le32_to_cpu(disk->total_blocks) -
1307 (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
1308 info->component_size = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
1309 }
1310
1311 static void getinfo_super_n_imsm_volume(struct supertype *st, struct mdinfo *info)
1312 {
1313 /* Find the particular details for info->disk.raid_disk.
1314 * This includes data_offset, component_size,
1315 */
1316 struct intel_super *super = st->sb;
1317 struct imsm_super *mpb = super->mpb;
1318 struct imsm_dev *dev = get_imsm_dev(mpb, super->creating_dev);
1319 struct imsm_map *map = &dev->vol.map[0];
1320
1321 info->data_offset = __le32_to_cpu(map->pba_of_lba0);
1322 info->component_size = __le32_to_cpu(map->blocks_per_member);
1323 }
1324
1325 static int validate_geometry_imsm(struct supertype *st, int level, int layout,
1326 int raiddisks, int chunk, unsigned long long size,
1327 char *dev, unsigned long long *freesize)
1328 {
1329 int fd, cfd;
1330 struct mdinfo *sra;
1331
1332 /* if given unused devices create a container
1333 * if given given devices in a container create a member volume
1334 */
1335 if (level == LEVEL_CONTAINER) {
1336 st->ss = &super_imsm_container;
1337 if (dev) {
1338 /* validate the container, dev == NULL */
1339 int rv = st->ss->validate_geometry(st, level, layout,
1340 raiddisks, chunk,
1341 size,
1342 NULL, freesize);
1343 if (rv)
1344 return rv;
1345 }
1346 return st->ss->validate_geometry(st, level, layout, raiddisks,
1347 chunk, size, dev, freesize);
1348 }
1349
1350 if (st->sb) {
1351 /* creating in a given container */
1352 st->ss = &super_imsm_volume;
1353 if (dev) {
1354 int rv = st->ss->validate_geometry(st, level, layout,
1355 raiddisks, chunk,
1356 size,
1357 NULL, freesize);
1358 if (rv)
1359 return rv;
1360 }
1361 return st->ss->validate_geometry(st, level, layout, raiddisks,
1362 chunk, size, dev, freesize);
1363 }
1364
1365 /* limit creation to the following levels */
1366 if (!dev)
1367 switch (level) {
1368 case 0:
1369 case 1:
1370 case 10:
1371 case 5:
1372 break;
1373 default:
1374 return 1;
1375 }
1376
1377 /* This device needs to be a device in an 'imsm' container */
1378 fd = open(dev, O_RDONLY|O_EXCL, 0);
1379 if (fd >= 0) {
1380 fprintf(stderr,
1381 Name ": Cannot create this array on device %s\n",
1382 dev);
1383 close(fd);
1384 return 0;
1385 }
1386 if (errno != EBUSY || (fd = open(dev, O_RDONLY, 0)) < 0) {
1387 fprintf(stderr, Name ": Cannot open %s: %s\n",
1388 dev, strerror(errno));
1389 return 0;
1390 }
1391 /* Well, it is in use by someone, maybe an 'imsm' container. */
1392 cfd = open_container(fd);
1393 if (cfd < 0) {
1394 close(fd);
1395 fprintf(stderr, Name ": Cannot use %s: It is busy\n",
1396 dev);
1397 return 0;
1398 }
1399 sra = sysfs_read(cfd, 0, GET_VERSION);
1400 close(fd);
1401 if (sra && sra->array.major_version == -1 &&
1402 strcmp(sra->text_version, "imsm") == 0) {
1403 /* This is a member of a imsm container. Load the container
1404 * and try to create a volume
1405 */
1406 struct intel_super *super;
1407 st->ss = &super_imsm_volume;
1408 if (load_super_imsm_all(st, cfd, (void **) &super, NULL, 1) == 0) {
1409 st->sb = super;
1410 st->container_dev = fd2devnum(cfd);
1411 close(cfd);
1412 return st->ss->validate_geometry(st, level, layout,
1413 raiddisks, chunk, size,
1414 dev, freesize);
1415 }
1416 close(cfd);
1417 } else /* may belong to another container */
1418 return 0;
1419
1420 return 1;
1421 }
1422
1423 static int validate_geometry_imsm_container(struct supertype *st, int level,
1424 int layout, int raiddisks, int chunk,
1425 unsigned long long size, char *dev,
1426 unsigned long long *freesize)
1427 {
1428 int fd;
1429 unsigned long long ldsize;
1430
1431 if (level != LEVEL_CONTAINER)
1432 return 0;
1433 if (!dev)
1434 return 1;
1435
1436 fd = open(dev, O_RDONLY|O_EXCL, 0);
1437 if (fd < 0) {
1438 fprintf(stderr, Name ": Cannot open %s: %s\n",
1439 dev, strerror(errno));
1440 return 0;
1441 }
1442 if (!get_dev_size(fd, dev, &ldsize)) {
1443 close(fd);
1444 return 0;
1445 }
1446 close(fd);
1447
1448 *freesize = avail_size_imsm(st, ldsize >> 9);
1449
1450 return 1;
1451 }
1452
1453 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1454 * FIX ME add ahci details
1455 */
1456 static int validate_geometry_imsm_volume(struct supertype *st, int level,
1457 int layout, int raiddisks, int chunk,
1458 unsigned long long size, char *dev,
1459 unsigned long long *freesize)
1460 {
1461 struct stat stb;
1462 struct intel_super *super = st->sb;
1463 struct dl *dl;
1464 unsigned long long pos = 0;
1465 unsigned long long maxsize;
1466 struct extent *e;
1467 int i;
1468
1469 if (level == LEVEL_CONTAINER)
1470 return 0;
1471
1472 if (level == 1 && raiddisks > 2) {
1473 fprintf(stderr, Name ": imsm does not support more than 2 "
1474 "in a raid1 configuration\n");
1475 return 0;
1476 }
1477
1478 /* We must have the container info already read in. */
1479 if (!super)
1480 return 0;
1481
1482 if (!dev) {
1483 /* General test: make sure there is space for
1484 * 'raiddisks' device extents of size 'size'.
1485 */
1486 unsigned long long minsize = size*2 /* convert to blocks */;
1487 int dcnt = 0;
1488 if (minsize == 0)
1489 minsize = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
1490 for (dl = super->disks; dl ; dl = dl->next) {
1491 int found = 0;
1492
1493 i = 0;
1494 e = get_extents(super, dl);
1495 if (!e) continue;
1496 do {
1497 unsigned long long esize;
1498 esize = e[i].start - pos;
1499 if (esize >= minsize)
1500 found = 1;
1501 pos = e[i].start + e[i].size;
1502 i++;
1503 } while (e[i-1].size);
1504 if (found)
1505 dcnt++;
1506 free(e);
1507 }
1508 if (dcnt < raiddisks) {
1509 fprintf(stderr, Name ": Not enough devices with space "
1510 "for this array (%d < %d)\n",
1511 dcnt, raiddisks);
1512 return 0;
1513 }
1514 return 1;
1515 }
1516 /* This device must be a member of the set */
1517 if (stat(dev, &stb) < 0)
1518 return 0;
1519 if ((S_IFMT & stb.st_mode) != S_IFBLK)
1520 return 0;
1521 for (dl = super->disks ; dl ; dl = dl->next) {
1522 if (dl->major == major(stb.st_rdev) &&
1523 dl->minor == minor(stb.st_rdev))
1524 break;
1525 }
1526 if (!dl) {
1527 fprintf(stderr, Name ": %s is not in the same imsm set\n",
1528 dev);
1529 return 0;
1530 }
1531 e = get_extents(super, dl);
1532 maxsize = 0;
1533 i = 0;
1534 if (e) do {
1535 unsigned long long esize;
1536 esize = e[i].start - pos;
1537 if (esize >= maxsize)
1538 maxsize = esize;
1539 pos = e[i].start + e[i].size;
1540 i++;
1541 } while (e[i-1].size);
1542 *freesize = maxsize;
1543
1544 return 1;
1545 }
1546
1547 static struct mdinfo *container_content_imsm(struct supertype *st)
1548 {
1549 /* Given a container loaded by load_super_imsm_all,
1550 * extract information about all the arrays into
1551 * an mdinfo tree.
1552 *
1553 * For each imsm_dev create an mdinfo, fill it in,
1554 * then look for matching devices in super->disks
1555 * and create appropriate device mdinfo.
1556 */
1557 struct intel_super *super = st->sb;
1558 struct imsm_super *mpb = super->mpb;
1559 struct mdinfo *rest = NULL;
1560 int i;
1561
1562 for (i = 0; i < mpb->num_raid_devs; i++) {
1563 struct imsm_dev *dev = get_imsm_dev(mpb, i);
1564 struct imsm_vol *vol = &dev->vol;
1565 struct imsm_map *map = vol->map;
1566 struct mdinfo *this;
1567 __u64 sz;
1568 int slot;
1569
1570 this = malloc(sizeof(*this));
1571 memset(this, 0, sizeof(*this));
1572 this->next = rest;
1573 rest = this;
1574
1575 this->array.major_version = 2000;
1576 get_imsm_numerical_version(mpb, &this->array.minor_version,
1577 &this->array.patch_version);
1578 this->array.level = get_imsm_raid_level(map);
1579 this->array.raid_disks = map->num_members;
1580 this->array.layout = imsm_level_to_layout(this->array.level);
1581 this->array.md_minor = -1;
1582 this->array.ctime = 0;
1583 this->array.utime = 0;
1584 this->array.chunk_size = __le16_to_cpu(map->blocks_per_strip) << 9;
1585 this->array.state = !vol->dirty;
1586 this->container_member = i;
1587 if (map->map_state == IMSM_T_STATE_UNINITIALIZED || dev->vol.dirty)
1588 this->resync_start = 0;
1589 else
1590 this->resync_start = ~0ULL;
1591
1592 strncpy(this->name, (char *) dev->volume, MAX_RAID_SERIAL_LEN);
1593 this->name[MAX_RAID_SERIAL_LEN] = 0;
1594
1595 sprintf(this->text_version, "/%s/%d",
1596 devnum2devname(st->container_dev),
1597 this->container_member);
1598
1599 memset(this->uuid, 0, sizeof(this->uuid));
1600
1601 sz = __le32_to_cpu(dev->size_high);
1602 sz <<= 32;
1603 sz += __le32_to_cpu(dev->size_low);
1604 this->component_size = sz;
1605 this->array.size = this->component_size / 2;
1606
1607 for (slot = 0 ; slot < map->num_members; slot++) {
1608 struct imsm_disk *disk;
1609 struct mdinfo *info_d;
1610 struct dl *d;
1611 int idx;
1612 __u32 s;
1613
1614 idx = __le32_to_cpu(map->disk_ord_tbl[slot] & ~(0xff << 24));
1615 for (d = super->disks; d ; d = d->next)
1616 if (d->index == idx)
1617 break;
1618
1619 if (d == NULL)
1620 break; /* shouldn't this be continue ?? */
1621
1622 info_d = malloc(sizeof(*info_d));
1623 if (!info_d)
1624 break; /* ditto ?? */
1625 memset(info_d, 0, sizeof(*info_d));
1626 info_d->next = this->devs;
1627 this->devs = info_d;
1628
1629 disk = get_imsm_disk(mpb, idx);
1630 s = __le32_to_cpu(disk->status);
1631
1632 info_d->disk.number = d->index;
1633 info_d->disk.major = d->major;
1634 info_d->disk.minor = d->minor;
1635 info_d->disk.raid_disk = slot;
1636 info_d->disk.state = s & CONFIGURED_DISK ? (1 << MD_DISK_ACTIVE) : 0;
1637 info_d->disk.state |= s & FAILED_DISK ? (1 << MD_DISK_FAULTY) : 0;
1638 info_d->disk.state |= s & USABLE_DISK ? (1 << MD_DISK_SYNC) : 0;
1639
1640 this->array.working_disks++;
1641
1642 info_d->events = __le32_to_cpu(mpb->generation_num);
1643 info_d->data_offset = __le32_to_cpu(map->pba_of_lba0);
1644 info_d->component_size = __le32_to_cpu(map->blocks_per_member);
1645 if (d->devname)
1646 strcpy(info_d->name, d->devname);
1647 }
1648 }
1649
1650 return rest;
1651 }
1652
1653
1654 static int imsm_open_new(struct supertype *c, struct active_array *a,
1655 char *inst)
1656 {
1657 dprintf("imsm: open_new %s\n", inst);
1658 a->info.container_member = atoi(inst);
1659 return 0;
1660 }
1661
1662 static __u8 imsm_check_degraded(struct imsm_super *mpb, int n, int failed)
1663 {
1664 struct imsm_dev *dev = get_imsm_dev(mpb, n);
1665 struct imsm_map *map = dev->vol.map;
1666
1667 if (!failed)
1668 return map->map_state;
1669
1670 switch (get_imsm_raid_level(map)) {
1671 case 0:
1672 return IMSM_T_STATE_FAILED;
1673 break;
1674 case 1:
1675 if (failed < map->num_members)
1676 return IMSM_T_STATE_DEGRADED;
1677 else
1678 return IMSM_T_STATE_FAILED;
1679 break;
1680 case 10:
1681 {
1682 /**
1683 * check to see if any mirrors have failed,
1684 * otherwise we are degraded
1685 */
1686 int device_per_mirror = 2; /* FIXME is this always the case?
1687 * and are they always adjacent?
1688 */
1689 int failed = 0;
1690 int i;
1691
1692 for (i = 0; i < map->num_members; i++) {
1693 int idx = get_imsm_disk_idx(map, i);
1694 struct imsm_disk *disk = get_imsm_disk(mpb, idx);
1695
1696 if (__le32_to_cpu(disk->status) & FAILED_DISK)
1697 failed++;
1698
1699 if (failed >= device_per_mirror)
1700 return IMSM_T_STATE_FAILED;
1701
1702 /* reset 'failed' for next mirror set */
1703 if (!((i + 1) % device_per_mirror))
1704 failed = 0;
1705 }
1706
1707 return IMSM_T_STATE_DEGRADED;
1708 }
1709 case 5:
1710 if (failed < 2)
1711 return IMSM_T_STATE_DEGRADED;
1712 else
1713 return IMSM_T_STATE_FAILED;
1714 break;
1715 default:
1716 break;
1717 }
1718
1719 return map->map_state;
1720 }
1721
1722 static int imsm_count_failed(struct imsm_super *mpb, struct imsm_map *map)
1723 {
1724 int i;
1725 int failed = 0;
1726 struct imsm_disk *disk;
1727
1728 for (i = 0; i < map->num_members; i++) {
1729 int idx = get_imsm_disk_idx(map, i);
1730
1731 disk = get_imsm_disk(mpb, idx);
1732 if (__le32_to_cpu(disk->status) & FAILED_DISK)
1733 failed++;
1734 }
1735
1736 return failed;
1737 }
1738
1739 static void imsm_set_array_state(struct active_array *a, int consistent)
1740 {
1741 int inst = a->info.container_member;
1742 struct intel_super *super = a->container->sb;
1743 struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
1744 struct imsm_map *map = &dev->vol.map[0];
1745 int dirty = !consistent;
1746 int failed;
1747 __u8 map_state;
1748
1749 if (a->resync_start == ~0ULL) {
1750 failed = imsm_count_failed(super->mpb, map);
1751 map_state = imsm_check_degraded(super->mpb, inst, failed);
1752 if (!failed)
1753 map_state = IMSM_T_STATE_NORMAL;
1754 if (map->map_state != map_state) {
1755 dprintf("imsm: map_state %d: %d\n",
1756 inst, map_state);
1757 map->map_state = map_state;
1758 super->updates_pending++;
1759 }
1760 }
1761
1762 if (dev->vol.dirty != dirty) {
1763 dprintf("imsm: mark '%s' (%llu)\n",
1764 dirty?"dirty":"clean", a->resync_start);
1765
1766 dev->vol.dirty = dirty;
1767 super->updates_pending++;
1768 }
1769 }
1770
1771 static void imsm_set_disk(struct active_array *a, int n, int state)
1772 {
1773 int inst = a->info.container_member;
1774 struct intel_super *super = a->container->sb;
1775 struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
1776 struct imsm_map *map = dev->vol.map;
1777 struct imsm_disk *disk;
1778 __u32 status;
1779 int failed = 0;
1780 int new_failure = 0;
1781
1782 if (n > map->num_members)
1783 fprintf(stderr, "imsm: set_disk %d out of range 0..%d\n",
1784 n, map->num_members - 1);
1785
1786 if (n < 0)
1787 return;
1788
1789 dprintf("imsm: set_disk %d:%x\n", n, state);
1790
1791 disk = get_imsm_disk(super->mpb, get_imsm_disk_idx(map, n));
1792
1793 /* check if we have seen this failure before */
1794 status = __le32_to_cpu(disk->status);
1795 if ((state & DS_FAULTY) && !(status & FAILED_DISK)) {
1796 status |= FAILED_DISK;
1797 disk->status = __cpu_to_le32(status);
1798 new_failure = 1;
1799 }
1800
1801 /**
1802 * the number of failures have changed, count up 'failed' to determine
1803 * degraded / failed status
1804 */
1805 if (new_failure && map->map_state != IMSM_T_STATE_FAILED)
1806 failed = imsm_count_failed(super->mpb, map);
1807
1808 if (failed)
1809 map->map_state = imsm_check_degraded(super->mpb, inst, failed);
1810
1811 if (new_failure)
1812 super->updates_pending++;
1813 }
1814
1815 static int store_imsm_mpb(int fd, struct intel_super *super)
1816 {
1817 struct imsm_super *mpb = super->mpb;
1818 __u32 mpb_size = __le32_to_cpu(mpb->mpb_size);
1819 unsigned long long dsize;
1820 unsigned long long sectors;
1821
1822 get_dev_size(fd, NULL, &dsize);
1823
1824 if (mpb_size > 512) {
1825 /* -1 to account for anchor */
1826 sectors = mpb_sectors(mpb) - 1;
1827
1828 /* write the extended mpb to the sectors preceeding the anchor */
1829 if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0)
1830 return 1;
1831
1832 if (write(fd, super->buf + 512, mpb_size - 512) != mpb_size - 512)
1833 return 1;
1834 }
1835
1836 /* first block is stored on second to last sector of the disk */
1837 if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
1838 return 1;
1839
1840 if (write(fd, super->buf, 512) != 512)
1841 return 1;
1842
1843 fsync(fd);
1844
1845 return 0;
1846 }
1847
1848 static void imsm_sync_metadata(struct supertype *container)
1849 {
1850 struct intel_super *super = container->sb;
1851
1852 if (!super->updates_pending)
1853 return;
1854
1855 write_super_imsm(super, 0);
1856
1857 super->updates_pending = 0;
1858 }
1859
1860 struct superswitch super_imsm = {
1861 #ifndef MDASSEMBLE
1862 .examine_super = examine_super_imsm,
1863 .brief_examine_super = brief_examine_super_imsm,
1864 .detail_super = detail_super_imsm,
1865 .brief_detail_super = brief_detail_super_imsm,
1866 #endif
1867 .match_home = match_home_imsm,
1868 .uuid_from_super= uuid_from_super_imsm,
1869 .getinfo_super = getinfo_super_imsm,
1870 .update_super = update_super_imsm,
1871
1872 .avail_size = avail_size_imsm,
1873
1874 .compare_super = compare_super_imsm,
1875
1876 .load_super = load_super_imsm,
1877 .init_super = init_zero_imsm,
1878 .store_super = store_zero_imsm,
1879 .free_super = free_super_imsm,
1880 .match_metadata_desc = match_metadata_desc_imsm,
1881 .getinfo_super_n = getinfo_super_n_imsm_container,
1882
1883 .validate_geometry = validate_geometry_imsm,
1884 .swapuuid = 0,
1885 .external = 1,
1886
1887 /* for mdmon */
1888 .open_new = imsm_open_new,
1889 .load_super = load_super_imsm,
1890 .set_array_state= imsm_set_array_state,
1891 .set_disk = imsm_set_disk,
1892 .sync_metadata = imsm_sync_metadata,
1893 };
1894
1895 /* super_imsm_container is set by validate_geometry_imsm when given a
1896 * device that is not part of any array
1897 */
1898 struct superswitch super_imsm_container = {
1899
1900 .validate_geometry = validate_geometry_imsm_container,
1901 .init_super = init_super_imsm,
1902 .add_to_super = add_to_super_imsm,
1903 .write_init_super = write_init_super_imsm,
1904 .getinfo_super = getinfo_super_imsm,
1905 .getinfo_super_n = getinfo_super_n_imsm_container,
1906 .load_super = load_super_imsm,
1907
1908 #ifndef MDASSEMBLE
1909 .examine_super = examine_super_imsm,
1910 .brief_examine_super = brief_examine_super_imsm,
1911 .detail_super = detail_super_imsm,
1912 .brief_detail_super = brief_detail_super_imsm,
1913 #endif
1914
1915 .free_super = free_super_imsm,
1916
1917 .container_content = container_content_imsm,
1918
1919 .swapuuid = 0,
1920 .external = 1,
1921 };
1922
1923 static struct superswitch super_imsm_volume = {
1924 .update_super = update_super_imsm,
1925 .init_super = init_super_imsm_volume,
1926 .add_to_super = add_to_super_imsm_volume,
1927 .getinfo_super = getinfo_super_imsm_volume,
1928 .getinfo_super_n = getinfo_super_n_imsm_volume,
1929 .write_init_super = write_init_super_imsm,
1930
1931 .load_super = load_super_imsm,
1932 .free_super = free_super_imsm,
1933 .match_metadata_desc = match_metadata_desc_imsm_volume,
1934
1935
1936 .validate_geometry = validate_geometry_imsm_volume,
1937 .swapuuid = 0,
1938 .external = 2,
1939 };
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