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[thirdparty/mdadm.git] / super-intel.c
CommitLineData
cdddbdbc
DW		 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"
c2a1e7da 21#include "mdmon.h"
cdddbdbc
DW		 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
c2c087e6
DW		 34#define MPB_SECTOR_CNT 418
35#define IMSM_RESERVED_SECTORS 4096
cdddbdbc
DW		 36
37/* Disk configuration info. */
38#define IMSM_MAX_DEVICES 255
39struct 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. */
54struct 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
75struct 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
86struct 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
97struct 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
114static char *map_state_str[] = { "normal", "uninitialized", "degraded", "failed" };
115#endif
116
87eb16df 117static unsigned int sector_count(__u32 bytes)
cdddbdbc 118{
87eb16df
DW		 119 return ((bytes + (512-1)) & (~(512-1))) / 512;
120}
cdddbdbc 121
87eb16df
DW		 122static unsigned int mpb_sectors(struct imsm_super *mpb)
123{
124 return sector_count(__le32_to_cpu(mpb->mpb_size));
cdddbdbc
DW		 125}
126
0063ecba
NB		 127static struct superswitch super_imsm_volume;
128
cdddbdbc
DW		 129/* internal representation of IMSM metadata */
130struct intel_super {
131 union {
132 struct imsm_super *mpb;
133 void *buf;
134 };
c2c087e6
DW		 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 */
cdddbdbc
DW		 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
c2c087e6
DW		 148struct extent {
149 unsigned long long start, size;
150};
151
cdddbdbc
DW		 152static 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));
ef609477 162 memset(st, 0, sizeof(*st));
cdddbdbc
DW		 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
8b353278 170static struct supertype *match_metadata_desc_imsm_volume(char *arg)
cdddbdbc
DW		 171{
172 struct supertype *st;
173
8b353278 174 if (strcmp(arg, "imsm/volume") != 0 &&
cdddbdbc
DW		 175 strcmp(arg, "raid") != 0 &&
176 strcmp(arg, "default") != 0
177 )
178 return NULL;
179
180 st = malloc(sizeof(*st));
ef609477 181 memset(st, 0, sizeof(*st));
8b353278 182 st->ss = &super_imsm_volume;
cdddbdbc
DW		 183 st->max_devs = IMSM_MAX_DEVICES;
184 st->minor_version = 0;
185 st->sb = NULL;
186 return st;
187}
188
189static __u8 *get_imsm_version(struct imsm_super *mpb)
190{
191 return &mpb->sig[MPB_SIG_LEN];
192}
193
194static 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
201static __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
213static 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
229static 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
250static __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
cdddbdbc
DW		 258static 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
c2c087e6
DW		 270static 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
281static 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
4f5bc454 332#ifndef MDASSEMBLE
cdddbdbc
DW		 333static 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
370static 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));
c2c087e6
DW		 386 sz = __le32_to_cpu(disk->total_blocks) -
387 (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS * mpb->num_raid_devs);
cdddbdbc
DW		 388 printf(" Usable Size : %llu%s\n", (unsigned long long)sz,
389 human_size(sz * 512));
390}
391
392static 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");
87eb16df 409 printf(" MPB Sectors : %d\n", mpb_sectors(mpb));
cdddbdbc
DW		 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
422static 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
431static void detail_super_imsm(struct supertype *st, char *homehost)
432{
433 printf("%s\n", __FUNCTION__);
434}
435
436static void brief_detail_super_imsm(struct supertype *st)
437{
438 printf("%s\n", __FUNCTION__);
439}
440#endif
441
442static int match_home_imsm(struct supertype *st, char *homehost)
443{
444 printf("%s\n", __FUNCTION__);
445
446 return 0;
447}
448
449static void uuid_from_super_imsm(struct supertype *st, int uuid[4])
450{
451 printf("%s\n", __FUNCTION__);
452}
453
0d481d37 454#if 0
4f5bc454
DW		 455static void
456get_imsm_numerical_version(struct imsm_super *mpb, int *m, int *p)
cdddbdbc 457{
cdddbdbc
DW		 458 __u8 *v = get_imsm_version(mpb);
459 __u8 *end = mpb->sig + MAX_SIGNATURE_LENGTH;
460 char major[] = { 0, 0, 0 };
461 char minor[] = { 0 ,0, 0 };
462 char patch[] = { 0, 0, 0 };
463 char *ver_parse[] = { major, minor, patch };
464 int i, j;
465
466 i = j = 0;
467 while (*v != '\0' && v < end) {
468 if (*v != '.' && j < 2)
469 ver_parse[i][j++] = *v;
470 else {
471 i++;
472 j = 0;
473 }
474 v++;
475 }
476
4f5bc454
DW		 477 *m = strtol(minor, NULL, 0);
478 *p = strtol(patch, NULL, 0);
479}
0d481d37 480#endif
4f5bc454 481
c2c087e6
DW		 482static int imsm_level_to_layout(int level)
483{
484 switch (level) {
485 case 0:
486 case 1:
487 return 0;
488 case 5:
489 case 6:
490 return ALGORITHM_LEFT_SYMMETRIC;
491 case 10:
492 return 0x102; //FIXME is this correct?
493 }
494 return -1;
495}
496
4f5bc454
DW		 497static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info)
498{
499 struct intel_super *super = st->sb;
500 struct imsm_super *mpb = super->mpb;
501 struct imsm_disk *disk;
502 __u32 s;
4f5bc454 503
cdddbdbc
DW		 504 info->array.raid_disks = mpb->num_disks;
505 info->array.level = LEVEL_CONTAINER;
506 info->array.layout = 0;
507 info->array.md_minor = -1;
c2c087e6 508 info->array.ctime = 0; /* N/A for imsm */
cdddbdbc
DW		 509 info->array.utime = 0;
510 info->array.chunk_size = 0;
511
512 info->disk.major = 0;
513 info->disk.minor = 0;
cdddbdbc 514 info->disk.raid_disk = -1;
c2c087e6
DW		 515 info->reshape_active = 0;
516 strcpy(info->text_version, "imsm");
517 info->disk.number = -1;
518 info->disk.state = 0;
519
4a04ec6c
DW		 520 if (super->disks) {
521 info->disk.number = super->disks->index;
522 info->disk.raid_disk = super->disks->index;
523 disk = get_imsm_disk(mpb, super->disks->index);
524 s = __le32_to_cpu(disk->status);
525 info->disk.state = s & CONFIGURED_DISK ? (1 << MD_DISK_ACTIVE) : 0;
526 info->disk.state |= s & FAILED_DISK ? (1 << MD_DISK_FAULTY) : 0;
527 info->disk.state |= s & USABLE_DISK ? (1 << MD_DISK_SYNC) : 0;
cdddbdbc 528 }
cdddbdbc
DW		 529}
530
8b353278 531static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info)
cdddbdbc 532{
c2c087e6
DW		 533 struct intel_super *super = st->sb;
534 struct imsm_super *mpb = super->mpb;
535 struct imsm_dev *dev = get_imsm_dev(mpb, info->container_member);
536 struct imsm_map *map = &dev->vol.map[0];
537
c2c087e6
DW		 538 info->array.raid_disks = map->num_members;
539 info->array.level = get_imsm_raid_level(map);
540 info->array.layout = imsm_level_to_layout(info->array.level);
541 info->array.md_minor = -1;
542 info->array.ctime = 0;
543 info->array.utime = 0;
544 info->array.chunk_size = __le16_to_cpu(map->blocks_per_strip * 512);
545
546 info->data_offset = __le32_to_cpu(map->pba_of_lba0);
547 info->component_size = __le32_to_cpu(map->blocks_per_member);
548
549 info->disk.major = 0;
550 info->disk.minor = 0;
159c3a1a
NB		 551
552 sprintf(info->text_version, "/%s/%d",
553 devnum2devname(st->container_dev),
c2c087e6 554 info->container_member);
cdddbdbc
DW		 555}
556
557static int update_super_imsm(struct supertype *st, struct mdinfo *info,
558 char *update, char *devname, int verbose,
559 int uuid_set, char *homehost)
560{
f352c545
DW		 561 /* FIXME */
562
563 /* For 'assemble' and 'force' we need to return non-zero if any
564 * change was made. For others, the return value is ignored.
565 * Update options are:
566 * force-one : This device looks a bit old but needs to be included,
567 * update age info appropriately.
568 * assemble: clear any 'faulty' flag to allow this device to
569 * be assembled.
570 * force-array: Array is degraded but being forced, mark it clean
571 * if that will be needed to assemble it.
572 *
573 * newdev: not used ????
574 * grow: Array has gained a new device - this is currently for
575 * linear only
576 * resync: mark as dirty so a resync will happen.
577 * name: update the name - preserving the homehost
578 *
579 * Following are not relevant for this imsm:
580 * sparc2.2 : update from old dodgey metadata
581 * super-minor: change the preferred_minor number
582 * summaries: update redundant counters.
583 * uuid: Change the uuid of the array to match watch is given
584 * homehost: update the recorded homehost
585 * _reshape_progress: record new reshape_progress position.
586 */
587 int rv = 0;
588 //struct intel_super *super = st->sb;
589 //struct imsm_super *mpb = super->mpb;
590
591 if (strcmp(update, "grow") == 0) {
592 }
593 if (strcmp(update, "resync") == 0) {
594 /* dev->vol.dirty = 1; */
595 }
596
597 /* IMSM has no concept of UUID or homehost */
598
599 return rv;
cdddbdbc
DW		 600}
601
c2c087e6 602static size_t disks_to_mpb_size(int disks)
cdddbdbc 603{
c2c087e6 604 size_t size;
cdddbdbc 605
c2c087e6
DW		 606 size = sizeof(struct imsm_super);
607 size += (disks - 1) * sizeof(struct imsm_disk);
608 size += 2 * sizeof(struct imsm_dev);
609 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
610 size += (4 - 2) * sizeof(struct imsm_map);
611 /* 4 possible disk_ord_tbl's */
612 size += 4 * (disks - 1) * sizeof(__u32);
613
614 return size;
615}
616
617static __u64 avail_size_imsm(struct supertype *st, __u64 devsize)
618{
619 if (devsize < (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS))
620 return 0;
621
622 return devsize - (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
cdddbdbc
DW		 623}
624
625static int compare_super_imsm(struct supertype *st, struct supertype *tst)
626{
627 /*
628 * return:
629 * 0 same, or first was empty, and second was copied
630 * 1 second had wrong number
631 * 2 wrong uuid
632 * 3 wrong other info
633 */
634 struct intel_super *first = st->sb;
635 struct intel_super *sec = tst->sb;
636
637 if (!first) {
638 st->sb = tst->sb;
639 tst->sb = NULL;
640 return 0;
641 }
642
643 if (memcmp(first->mpb->sig, sec->mpb->sig, MAX_SIGNATURE_LENGTH) != 0)
644 return 3;
645 if (first->mpb->family_num != sec->mpb->family_num)
646 return 3;
647 if (first->mpb->mpb_size != sec->mpb->mpb_size)
648 return 3;
649 if (first->mpb->check_sum != sec->mpb->check_sum)
650 return 3;
651
652 return 0;
653}
654
655extern int scsi_get_serial(int fd, void *buf, size_t buf_len);
656
657static int imsm_read_serial(int fd, char *devname,
658 __u8 serial[MAX_RAID_SERIAL_LEN])
659{
660 unsigned char scsi_serial[255];
cdddbdbc 661 int sg_fd;
cdddbdbc
DW		 662 int rv;
663 int rsp_len;
664 int i, cnt;
665
666 memset(scsi_serial, 0, sizeof(scsi_serial));
cdddbdbc 667
90c8b707 668 sg_fd = sysfs_disk_to_sg(fd);
cdddbdbc
DW		 669 if (sg_fd < 0) {
670 if (devname)
671 fprintf(stderr,
90c8b707
DW		 672 Name ": Failed to open sg interface for %s: %s\n",
673 devname, strerror(errno));
cdddbdbc
DW		 674 return 1;
675 }
676
677 rv = scsi_get_serial(sg_fd, scsi_serial, sizeof(scsi_serial));
678 close(sg_fd);
679
680 if (rv != 0) {
681 if (devname)
682 fprintf(stderr,
683 Name ": Failed to retrieve serial for %s\n",
684 devname);
685 return rv;
686 }
687
688 rsp_len = scsi_serial[3];
689 for (i = 0, cnt = 0; i < rsp_len; i++) {
690 if (!isspace(scsi_serial[4 + i]))
691 serial[cnt++] = scsi_serial[4 + i];
692 if (cnt == MAX_RAID_SERIAL_LEN)
693 break;
694 }
695
696 serial[MAX_RAID_SERIAL_LEN - 1] = '\0';
697
698 return 0;
699}
700
701static int
702load_imsm_disk(int fd, struct intel_super *super, char *devname, int keep_fd)
703{
704 struct imsm_super *mpb = super->mpb;
705 struct dl *dl;
706 struct stat stb;
707 struct imsm_disk *disk;
708 int rv;
709 int i;
710
711 dl = malloc(sizeof(*dl));
712 if (!dl) {
713 if (devname)
714 fprintf(stderr,
715 Name ": failed to allocate disk buffer for %s\n",
716 devname);
717 return 2;
718 }
719 memset(dl, 0, sizeof(*dl));
720
721 fstat(fd, &stb);
722 dl->major = major(stb.st_rdev);
723 dl->minor = minor(stb.st_rdev);
724 dl->next = super->disks;
725 dl->fd = keep_fd ? fd : -1;
726 dl->devname = devname ? strdup(devname) : NULL;
727 dl->index = -1;
728 super->disks = dl;
729 rv = imsm_read_serial(fd, devname, dl->serial);
730
731 if (rv != 0)
732 return 2;
733
734 /* look up this disk's index */
735 for (i = 0; i < mpb->num_disks; i++) {
736 disk = get_imsm_disk(mpb, i);
737
738 if (memcmp(disk->serial, dl->serial, MAX_RAID_SERIAL_LEN) == 0)
739 break;
740 }
741
742 if (i > mpb->num_disks)
743 return 2;
744
745 dl->index = i;
746
747 return 0;
748}
749
750/* load_imsm_mpb - read matrix metadata
751 * allocates super->mpb to be freed by free_super
752 */
753static int load_imsm_mpb(int fd, struct intel_super *super, char *devname)
754{
755 unsigned long long dsize;
756 size_t len, mpb_size;
757 unsigned long long sectors;
758 struct stat;
759 struct imsm_super anchor;
760 __u32 check_sum;
761
762 memset(super, 0, sizeof(*super));
763 get_dev_size(fd, NULL, &dsize);
764
765 if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) {
766 if (devname)
767 fprintf(stderr,
768 Name ": Cannot seek to anchor block on %s: %s\n",
769 devname, strerror(errno));
770 return 1;
771 }
772
773 len = sizeof(anchor);
774 if (read(fd, &anchor, len) != len) {
775 if (devname)
776 fprintf(stderr,
777 Name ": Cannot read anchor block on %s: %s\n",
778 devname, strerror(errno));
779 return 1;
780 }
781
782 if (strncmp((char *) anchor.sig, MPB_SIGNATURE, MPB_SIG_LEN) != 0) {
783 if (devname)
784 fprintf(stderr,
785 Name ": no IMSM anchor on %s\n", devname);
786 return 2;
787 }
788
789 mpb_size = __le32_to_cpu(anchor.mpb_size);
790 super->mpb = malloc(mpb_size < 512 ? 512 : mpb_size);
791 if (!super->mpb) {
792 if (devname)
793 fprintf(stderr,
794 Name ": unable to allocate %zu byte mpb buffer\n",
795 mpb_size);
796 return 2;
797 }
798 memcpy(super->buf, &anchor, sizeof(anchor));
799
800 /* read the rest of the first block */
801 len = 512 - sizeof(anchor);
802 if (read(fd, super->buf + sizeof(anchor), len) != len) {
803 if (devname)
804 fprintf(stderr,
805 Name ": Cannot read anchor remainder on %s: %s\n",
806 devname, strerror(errno));
807 return 2;
808 }
809
810 sectors = mpb_sectors(&anchor) - 1;
811 if (!sectors)
812 return load_imsm_disk(fd, super, devname, 0);
813
814 /* read the extended mpb */
815 if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0) {
816 if (devname)
817 fprintf(stderr,
818 Name ": Cannot seek to extended mpb on %s: %s\n",
819 devname, strerror(errno));
820 return 1;
821 }
822
823 len = mpb_size - 512;
824 if (read(fd, super->buf + 512, len) != len) {
825 if (devname)
826 fprintf(stderr,
827 Name ": Cannot read extended mpb on %s: %s\n",
828 devname, strerror(errno));
829 return 2;
830 }
831
832 check_sum = gen_imsm_checksum(super->mpb);
833 if (check_sum != __le32_to_cpu(super->mpb->check_sum)) {
834 if (devname)
835 fprintf(stderr,
836 Name ": IMSM checksum %x != %x on %s\n",
837 check_sum, __le32_to_cpu(super->mpb->check_sum),
838 devname);
839 return 2;
840 }
841
842 return load_imsm_disk(fd, super, devname, 0);
843}
844
845struct superswitch super_imsm_container;
846
847static void free_imsm_disks(struct intel_super *super)
848{
849 while (super->disks) {
850 struct dl *d = super->disks;
851
852 super->disks = d->next;
853 if (d->fd >= 0)
854 close(d->fd);
855 if (d->devname)
856 free(d->devname);
857 free(d);
858 }
859}
860
861static void free_imsm(struct intel_super *super)
862{
863 if (super->mpb)
864 free(super->mpb);
865 free_imsm_disks(super);
866 free(super);
867}
868
869
870static void free_super_imsm(struct supertype *st)
871{
872 struct intel_super *super = st->sb;
873
874 if (!super)
875 return;
876
877 free_imsm(super);
878 st->sb = NULL;
879}
880
c2c087e6
DW		 881static struct intel_super *alloc_super(int creating_imsm)
882{
883 struct intel_super *super = malloc(sizeof(*super));
884
885 if (super) {
886 memset(super, 0, sizeof(*super));
887 super->creating_imsm = creating_imsm;
888 super->creating_dev = -1;
889 }
890
891 return super;
892}
893
cdddbdbc
DW		 894#ifndef MDASSEMBLE
895static int load_super_imsm_all(struct supertype *st, int fd, void **sbp,
896 char *devname, int keep_fd)
897{
898 struct mdinfo *sra;
899 struct intel_super *super;
900 struct mdinfo *sd, *best = NULL;
901 __u32 bestgen = 0;
902 __u32 gen;
903 char nm[20];
904 int dfd;
905 int rv;
906
907 /* check if this disk is a member of an active array */
908 sra = sysfs_read(fd, 0, GET_LEVEL|GET_VERSION|GET_DEVS|GET_STATE);
909 if (!sra)
910 return 1;
911
912 if (sra->array.major_version != -1 ||
913 sra->array.minor_version != -2 ||
914 strcmp(sra->text_version, "imsm") != 0)
915 return 1;
916
c2c087e6 917 super = alloc_super(0);
cdddbdbc
DW		 918 if (!super)
919 return 1;
920
921 /* find the most up to date disk in this array */
922 for (sd = sra->devs; sd; sd = sd->next) {
923 sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
924 dfd = dev_open(nm, keep_fd ? O_RDWR : O_RDONLY);
925 if (!dfd) {
926 free_imsm(super);
927 return 2;
928 }
929 rv = load_imsm_mpb(dfd, super, NULL);
930 if (!keep_fd)
931 close(dfd);
932 if (rv == 0) {
933 gen = __le32_to_cpu(super->mpb->generation_num);
934 if (!best || gen > bestgen) {
935 bestgen = gen;
936 best = sd;
937 }
938 } else {
939 free_imsm(super);
940 return 2;
941 }
942 }
943
944 if (!best) {
945 free_imsm(super);
946 return 1;
947 }
948
949 /* load the most up to date anchor */
950 sprintf(nm, "%d:%d", best->disk.major, best->disk.minor);
951 dfd = dev_open(nm, O_RDONLY);
952 if (!dfd) {
953 free_imsm(super);
954 return 1;
955 }
956 rv = load_imsm_mpb(dfd, super, NULL);
957 close(dfd);
958 if (rv != 0) {
959 free_imsm(super);
960 return 2;
961 }
962
963 /* reset the disk list */
964 free_imsm_disks(super);
965
966 /* populate disk list */
967 for (sd = sra->devs ; sd ; sd = sd->next) {
968 sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
969 dfd = dev_open(nm, keep_fd? O_RDWR : O_RDONLY);
970 if (!dfd) {
971 free_imsm(super);
972 return 2;
973 }
974 load_imsm_disk(dfd, super, NULL, keep_fd);
975 if (!keep_fd)
976 close(dfd);
977 }
978
f7e7067b
NB		 979 if (st->subarray[0]) {
980 /* FIXME */
981 }
982
cdddbdbc
DW		 983 *sbp = super;
984 if (st->ss == NULL) {
985 st->ss = &super_imsm_container;
986 st->minor_version = 0;
987 st->max_devs = IMSM_MAX_DEVICES;
f4d11639 988 st->container_dev = fd2devnum(fd);
cdddbdbc
DW		 989 }
990
991 return 0;
992}
993#endif
994
995static int load_super_imsm(struct supertype *st, int fd, char *devname)
996{
997 struct intel_super *super;
998 int rv;
999
1000#ifndef MDASSEMBLE
3dbccbcf 1001 if (load_super_imsm_all(st, fd, &st->sb, devname, 1) == 0)
cdddbdbc
DW		 1002 return 0;
1003#endif
f7e7067b
NB		 1004 if (st->subarray[0])
1005 return 1; /* FIXME */
cdddbdbc 1006
c2c087e6 1007 super = alloc_super(0);
cdddbdbc
DW		 1008 if (!super) {
1009 fprintf(stderr,
1010 Name ": malloc of %zu failed.\n",
1011 sizeof(*super));
1012 return 1;
1013 }
1014
1015 rv = load_imsm_mpb(fd, super, devname);
1016
1017 if (rv) {
1018 if (devname)
1019 fprintf(stderr,
1020 Name ": Failed to load all information "
1021 "sections on %s\n", devname);
1022 free_imsm(super);
1023 return rv;
1024 }
1025
1026 st->sb = super;
1027 if (st->ss == NULL) {
1028 st->ss = &super_imsm;
1029 st->minor_version = 0;
1030 st->max_devs = IMSM_MAX_DEVICES;
1031 }
1032
1033 return 0;
1034}
1035
1036static int init_zero_imsm(struct supertype *st, mdu_array_info_t *info,
1037 unsigned long long size, char *name,
1038 char *homehost, int *uuid)
1039{
551c80c1 1040 st->sb = NULL;
cdddbdbc
DW		 1041 return 0;
1042}
1043
1044static int init_super_imsm(struct supertype *st, mdu_array_info_t *info,
1045 unsigned long long size, char *name,
1046 char *homehost, int *uuid)
1047{
c2c087e6
DW		 1048 /* This is primarily called by Create when creating a new array.
1049 * We will then get add_to_super called for each component, and then
1050 * write_init_super called to write it out to each device.
1051 * For IMSM, Create can create on fresh devices or on a pre-existing
1052 * array.
1053 * To create on a pre-existing array a different method will be called.
1054 * This one is just for fresh drives.
1055 */
1056 struct intel_super *super;
1057 struct imsm_super *mpb;
1058 size_t mpb_size;
cdddbdbc 1059
c2c087e6
DW		 1060 super = alloc_super(1);
1061 if (!super)
1062 return 0;
1063 mpb_size = disks_to_mpb_size(info->nr_disks);
1064 mpb = malloc(mpb_size);
1065 if (!mpb) {
1066 free(super);
1067 return 0;
1068 }
1069 memset(mpb, 0, mpb_size);
1070
1071 memcpy(mpb->sig, MPB_SIGNATURE, strlen(MPB_SIGNATURE));
1072 memcpy(mpb->sig + strlen(MPB_SIGNATURE), MPB_VERSION_RAID5,
1073 strlen(MPB_VERSION_RAID5));
1074 mpb->mpb_size = mpb_size;
1075
1076 super->mpb = mpb;
1077 st->sb = super;
1078 return 1;
cdddbdbc
DW		 1079}
1080
8b353278
DW		 1081static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info,
1082 unsigned long long size, char *name,
1083 char *homehost, int *uuid)
cdddbdbc 1084{
c2c087e6
DW		 1085 /* We are creating a volume inside a pre-existing container.
1086 * so st->sb is already set.
1087 */
1088 struct intel_super *super = st->sb;
1089 struct imsm_super *mpb = super->mpb;
1090 struct imsm_dev *dev;
1091 struct imsm_vol *vol;
1092 struct imsm_map *map;
1093 int idx = mpb->num_raid_devs;
1094 int i;
1095 unsigned long long array_blocks;
1096 unsigned long long sz;
1097 __u32 offset = 0;
cdddbdbc 1098
c2c087e6
DW		 1099 if (mpb->num_raid_devs >= 2) {
1100 fprintf(stderr, Name": This imsm-container already has the "
1101 "maximum of 2 volumes\n");
1102 return 0;
1103 }
1104
1105 super->creating_dev = idx;
1106 mpb->num_raid_devs++;
1107 dev = get_imsm_dev(mpb, idx);
1108 strncpy((char *) dev->volume, name, MAX_RAID_SERIAL_LEN);
1109 array_blocks = calc_array_size(info->level, info->raid_disks,
1110 info->layout, info->chunk_size,
1111 info->size*2);
1112 dev->size_low = __cpu_to_le32((__u32) array_blocks);
1113 dev->size_high = __cpu_to_le32((__u32) (array_blocks >> 32));
1114 dev->status = __cpu_to_le32(0);
1115 dev->reserved_blocks = __cpu_to_le32(0);
1116 vol = &dev->vol;
1117 vol->migr_state = 0;
1118 vol->migr_type = 0;
1119 vol->dirty = 0;
1120 for (i = 0; i < idx; i++) {
1121 struct imsm_dev *prev = get_imsm_dev(mpb, i);
1122 struct imsm_map *pmap = &prev->vol.map[0];
1123
1124 offset += __le32_to_cpu(pmap->blocks_per_member);
1125 offset += IMSM_RESERVED_SECTORS;
1126 }
1127 map = &vol->map[0];
1128 map->pba_of_lba0 = __cpu_to_le32(offset);
1129 sz = info->size * 2;
1130 map->blocks_per_member = __cpu_to_le32(sz);
1131 map->blocks_per_strip = __cpu_to_le16(info->chunk_size >> 9);
1132 map->num_data_stripes = __cpu_to_le32(sz / (info->chunk_size >> 9));
1133 map->map_state = info->level ? IMSM_T_STATE_UNINITIALIZED :
1134 IMSM_T_STATE_NORMAL;
1135 if (info->level == 10)
1136 map->raid_level = 1;
1137 else
1138 map->raid_level = info->level;
1139 map->num_members = info->raid_disks;
1140 for (i = 0; i < map->num_members; i++) {
1141 /* initialized in add_to_super */
1142 map->disk_ord_tbl[i] = __cpu_to_le32(0);
1143 }
1144
1145 return 1;
cdddbdbc
DW		 1146}
1147
c2c087e6 1148static void add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk,
cdddbdbc
DW		 1149 int fd, char *devname)
1150{
c2c087e6
DW		 1151 struct intel_super *super = st->sb;
1152 struct imsm_super *mpb = super->mpb;
1153 struct imsm_disk *disk;
1154 struct dl *dd;
1155 unsigned long long size;
1156 __u32 status, id;
1157 int rv;
1158 struct stat stb;
1159
1160 fstat(fd, &stb);
1161 dd = malloc(sizeof(*dd));
1162 if (!dd) {
1163 fprintf(stderr,
1164 Name ": malloc failed %s:%d.\n", __func__, __LINE__);
1165 abort();
1166 }
1167 memset(dd, 0, sizeof(*dd));
1168 dd->major = major(stb.st_rdev);
1169 dd->minor = minor(stb.st_rdev);
1170 dd->index = dk->number;
1171 dd->devname = devname ? strdup(devname) : NULL;
1172 dd->next = super->disks;
1173 dd->fd = fd;
1174 rv = imsm_read_serial(fd, devname, dd->serial);
1175 if (rv) {
1176 fprintf(stderr,
1177 Name ": failed to retrieve scsi serial "
1178 "using \'%s\' instead\n", devname);
1179 strcpy((char *) dd->serial, devname);
1180 }
1181
1182 if (mpb->num_disks <= dk->number)
1183 mpb->num_disks = dk->number + 1;
1184
1185 disk = get_imsm_disk(mpb, dk->number);
1186 get_dev_size(fd, NULL, &size);
1187 size /= 512;
1188 status = USABLE_DISK | SPARE_DISK;
1189 strcpy((char *) disk->serial, (char *) dd->serial);
1190 disk->total_blocks = __cpu_to_le32(size);
1191 disk->status = __cpu_to_le32(status);
1192 if (sysfs_disk_to_scsi_id(fd, &id) == 0)
1193 disk->scsi_id = __cpu_to_le32(id);
1194 else
1195 disk->scsi_id = __cpu_to_le32(0);
1196
1197 /* update the family number if we are creating a container */
1198 if (super->creating_imsm)
1199 mpb->family_num = __cpu_to_le32(gen_imsm_checksum(mpb));
1200
1201 super->disks = dd;
cdddbdbc
DW		 1202}
1203
c2c087e6 1204static void add_to_super_imsm_volume(struct supertype *st, mdu_disk_info_t *dk,
8b353278 1205 int fd, char *devname)
cdddbdbc 1206{
c2c087e6
DW		 1207 struct intel_super *super = st->sb;
1208 struct imsm_super *mpb = super->mpb;
1209 struct dl *dl;
1210 struct imsm_dev *dev;
1211 struct imsm_map *map;
1212 struct imsm_disk *disk;
1213 __u32 status;
1214
1215 if (super->creating_dev == -1) {
1216 fprintf(stderr, Name ": no active raid device\n");
1217 abort();
1218 }
1219
1220 dev = get_imsm_dev(mpb, super->creating_dev);
1221 map = &dev->vol.map[0];
1222
1223 for (dl = super->disks; dl ; dl = dl->next)
1224 if (dl->major == dk->major &&
1225 dl->minor == dk->minor)
1226 break;
1227 if (!dl || ! (dk->state & (1<<MD_DISK_SYNC)))
1228 return;
1229
1230 map->disk_ord_tbl[dk->number] = __cpu_to_le32(dl->index);
1231
1232 disk = get_imsm_disk(mpb, dl->index);
1233 status = CONFIGURED_DISK | USABLE_DISK;
1234 disk->status = __cpu_to_le32(status);
cdddbdbc
DW		 1235}
1236
c2c087e6
DW		 1237static int store_imsm_mpb(int fd, struct intel_super *super);
1238
1239static int write_super_imsm(struct intel_super *super, int doclose)
cdddbdbc 1240{
c2c087e6
DW		 1241 struct imsm_super *mpb = super->mpb;
1242 struct dl *d;
1243 __u32 generation;
1244 __u32 sum;
cdddbdbc 1245
c2c087e6
DW		 1246 /* 'generation' is incremented everytime the metadata is written */
1247 generation = __le32_to_cpu(mpb->generation_num);
1248 generation++;
1249 mpb->generation_num = __cpu_to_le32(generation);
1250
1251 /* recalculate checksum */
1252 sum = gen_imsm_checksum(mpb);
1253 mpb->check_sum = __cpu_to_le32(sum);
1254
1255 for (d = super->disks; d ; d = d->next) {
1256 if (store_imsm_mpb(d->fd, super)) {
1257 fprintf(stderr, "%s: failed for device %d:%d %s\n",
1258 __func__, d->major, d->minor, strerror(errno));
1259 return 0;
1260 }
1261 if (doclose) {
1262 close(d->fd);
1263 d->fd = -1;
1264 }
1265 }
1266
1267 return 1;
1268}
1269
1270static int write_init_super_imsm(struct supertype *st)
1271{
1272 return write_super_imsm(st->sb, 1);
cdddbdbc
DW		 1273}
1274
1275static int store_zero_imsm(struct supertype *st, int fd)
1276{
551c80c1
DW		 1277 unsigned long long dsize;
1278 char buf[512];
1279
1280 get_dev_size(fd, NULL, &dsize);
1281
1282 /* first block is stored on second to last sector of the disk */
1283 if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
1284 return 1;
1285
1286 memset(buf, 0, sizeof(buf));
1287 if (write(fd, buf, sizeof(buf)) != sizeof(buf))
1288 return 1;
cdddbdbc
DW		 1289
1290 return 0;
1291}
1292
f352c545 1293static void getinfo_super_n_imsm_container(struct supertype *st, struct mdinfo *info)
cdddbdbc 1294{
f352c545 1295 /* just need offset and size...
c2c087e6 1296 * of the metadata
f352c545
DW		 1297 */
1298 struct intel_super *super = st->sb;
1299 struct imsm_super *mpb = super->mpb;
1300 struct imsm_disk *disk = get_imsm_disk(mpb, info->disk.number);
f352c545 1301
c2c087e6
DW		 1302 info->data_offset = __le32_to_cpu(disk->total_blocks) -
1303 (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
1304 info->component_size = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
cdddbdbc
DW		 1305}
1306
8b353278 1307static void getinfo_super_n_imsm_volume(struct supertype *st, struct mdinfo *info)
cdddbdbc 1308{
c2c087e6
DW		 1309 /* Find the particular details for info->disk.raid_disk.
1310 * This includes data_offset, component_size,
1311 */
1312 struct intel_super *super = st->sb;
1313 struct imsm_super *mpb = super->mpb;
1314 struct imsm_dev *dev = get_imsm_dev(mpb, super->creating_dev);
1315 struct imsm_map *map = &dev->vol.map[0];
1316
1317 info->data_offset = __le32_to_cpu(map->pba_of_lba0);
1318 info->component_size = __le32_to_cpu(map->blocks_per_member);
cdddbdbc
DW		 1319}
1320
1321static int validate_geometry_imsm(struct supertype *st, int level, int layout,
1322 int raiddisks, int chunk, unsigned long long size,
c2c087e6 1323 char *dev, unsigned long long *freesize)
cdddbdbc 1324{
c2c087e6
DW		 1325 int fd, cfd;
1326 struct mdinfo *sra;
cdddbdbc 1327
c2c087e6
DW		 1328 /* if given unused devices create a container
1329 * if given given devices in a container create a member volume
1330 */
1331 if (level == LEVEL_CONTAINER) {
1332 st->ss = &super_imsm_container;
1333 if (dev) {
1334 /* validate the container, dev == NULL */
1335 int rv = st->ss->validate_geometry(st, level, layout,
1336 raiddisks, chunk,
1337 size,
1338 NULL, freesize);
1339 if (rv)
1340 return rv;
1341 }
1342 return st->ss->validate_geometry(st, level, layout, raiddisks,
1343 chunk, size, dev, freesize);
1344 }
1345
1346 if (st->sb) {
1347 /* creating in a given container */
1348 st->ss = &super_imsm_volume;
1349 if (dev) {
1350 int rv = st->ss->validate_geometry(st, level, layout,
1351 raiddisks, chunk,
1352 size,
1353 NULL, freesize);
1354 if (rv)
1355 return rv;
1356 }
1357 return st->ss->validate_geometry(st, level, layout, raiddisks,
1358 chunk, size, dev, freesize);
1359 }
1360
1361 /* limit creation to the following levels */
1362 if (!dev)
1363 switch (level) {
1364 case 0:
1365 case 1:
1366 case 10:
1367 case 5:
1368 break;
1369 default:
1370 return 1;
1371 }
1372
1373 /* This device needs to be a device in an 'imsm' container */
1374 fd = open(dev, O_RDONLY|O_EXCL, 0);
1375 if (fd >= 0) {
1376 fprintf(stderr,
1377 Name ": Cannot create this array on device %s\n",
1378 dev);
1379 close(fd);
1380 return 0;
1381 }
1382 if (errno != EBUSY || (fd = open(dev, O_RDONLY, 0)) < 0) {
1383 fprintf(stderr, Name ": Cannot open %s: %s\n",
1384 dev, strerror(errno));
1385 return 0;
1386 }
1387 /* Well, it is in use by someone, maybe an 'imsm' container. */
1388 cfd = open_container(fd);
1389 if (cfd < 0) {
1390 close(fd);
1391 fprintf(stderr, Name ": Cannot use %s: It is busy\n",
1392 dev);
1393 return 0;
1394 }
1395 sra = sysfs_read(cfd, 0, GET_VERSION);
1396 close(fd);
1397 if (sra && sra->array.major_version == -1 &&
1398 strcmp(sra->text_version, "imsm") == 0) {
1399 /* This is a member of a imsm container. Load the container
1400 * and try to create a volume
1401 */
1402 struct intel_super *super;
1403 st->ss = &super_imsm_volume;
1404 if (load_super_imsm_all(st, cfd, (void **) &super, NULL, 1) == 0) {
1405 st->sb = super;
1406 st->container_dev = fd2devnum(cfd);
1407 close(cfd);
1408 return st->ss->validate_geometry(st, level, layout,
1409 raiddisks, chunk, size,
1410 dev, freesize);
1411 }
1412 close(cfd);
1413 } else /* may belong to another container */
1414 return 0;
1415
1416 return 1;
cdddbdbc
DW		 1417}
1418
1419static int validate_geometry_imsm_container(struct supertype *st, int level,
1420 int layout, int raiddisks, int chunk,
c2c087e6 1421 unsigned long long size, char *dev,
cdddbdbc
DW		 1422 unsigned long long *freesize)
1423{
c2c087e6
DW		 1424 int fd;
1425 unsigned long long ldsize;
cdddbdbc 1426
c2c087e6
DW		 1427 if (level != LEVEL_CONTAINER)
1428 return 0;
1429 if (!dev)
1430 return 1;
1431
1432 fd = open(dev, O_RDONLY|O_EXCL, 0);
1433 if (fd < 0) {
1434 fprintf(stderr, Name ": Cannot open %s: %s\n",
1435 dev, strerror(errno));
1436 return 0;
1437 }
1438 if (!get_dev_size(fd, dev, &ldsize)) {
1439 close(fd);
1440 return 0;
1441 }
1442 close(fd);
1443
1444 *freesize = avail_size_imsm(st, ldsize >> 9);
1445
1446 return 1;
cdddbdbc
DW		 1447}
1448
c2c087e6
DW		 1449/* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
1450 * FIX ME add ahci details
1451 */
8b353278
DW		 1452static int validate_geometry_imsm_volume(struct supertype *st, int level,
1453 int layout, int raiddisks, int chunk,
c2c087e6 1454 unsigned long long size, char *dev,
8b353278 1455 unsigned long long *freesize)
cdddbdbc 1456{
c2c087e6
DW		 1457 struct stat stb;
1458 struct intel_super *super = st->sb;
1459 struct dl *dl;
1460 unsigned long long pos = 0;
1461 unsigned long long maxsize;
1462 struct extent *e;
1463 int i;
cdddbdbc 1464
c2c087e6
DW		 1465 if (level == LEVEL_CONTAINER)
1466 return 0;
1467
1468 if (level == 1 && raiddisks > 2) {
1469 fprintf(stderr, Name ": imsm does not support more than 2 "
1470 "in a raid1 configuration\n");
1471 return 0;
1472 }
1473
1474 /* We must have the container info already read in. */
1475 if (!super)
1476 return 0;
1477
1478 if (!dev) {
1479 /* General test: make sure there is space for
1480 * 'raiddisks' device extents of size 'size'.
1481 */
1482 unsigned long long minsize = size*2 /* convert to blocks */;
1483 int dcnt = 0;
1484 if (minsize == 0)
1485 minsize = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
1486 for (dl = super->disks; dl ; dl = dl->next) {
1487 int found = 0;
1488
1489 i = 0;
1490 e = get_extents(super, dl);
1491 if (!e) continue;
1492 do {
1493 unsigned long long esize;
1494 esize = e[i].start - pos;
1495 if (esize >= minsize)
1496 found = 1;
1497 pos = e[i].start + e[i].size;
1498 i++;
1499 } while (e[i-1].size);
1500 if (found)
1501 dcnt++;
1502 free(e);
1503 }
1504 if (dcnt < raiddisks) {
1505 fprintf(stderr, Name ": Not enough devices with space "
1506 "for this array (%d < %d)\n",
1507 dcnt, raiddisks);
1508 return 0;
1509 }
1510 return 1;
1511 }
1512 /* This device must be a member of the set */
1513 if (stat(dev, &stb) < 0)
1514 return 0;
1515 if ((S_IFMT & stb.st_mode) != S_IFBLK)
1516 return 0;
1517 for (dl = super->disks ; dl ; dl = dl->next) {
1518 if (dl->major == major(stb.st_rdev) &&
1519 dl->minor == minor(stb.st_rdev))
1520 break;
1521 }
1522 if (!dl) {
1523 fprintf(stderr, Name ": %s is not in the same imsm set\n",
1524 dev);
1525 return 0;
1526 }
1527 e = get_extents(super, dl);
1528 maxsize = 0;
1529 i = 0;
1530 if (e) do {
1531 unsigned long long esize;
1532 esize = e[i].start - pos;
1533 if (esize >= maxsize)
1534 maxsize = esize;
1535 pos = e[i].start + e[i].size;
1536 i++;
1537 } while (e[i-1].size);
1538 *freesize = maxsize;
1539
1540 return 1;
cdddbdbc
DW		 1541}
1542
cdddbdbc
DW		 1543static struct mdinfo *container_content_imsm(struct supertype *st)
1544{
4f5bc454
DW		 1545 /* Given a container loaded by load_super_imsm_all,
1546 * extract information about all the arrays into
1547 * an mdinfo tree.
1548 *
1549 * For each imsm_dev create an mdinfo, fill it in,
1550 * then look for matching devices in super->disks
1551 * and create appropriate device mdinfo.
1552 */
1553 struct intel_super *super = st->sb;
1554 struct imsm_super *mpb = super->mpb;
1555 struct mdinfo *rest = NULL;
1556 int i;
cdddbdbc 1557
4f5bc454
DW		 1558 for (i = 0; i < mpb->num_raid_devs; i++) {
1559 struct imsm_dev *dev = get_imsm_dev(mpb, i);
1560 struct imsm_vol *vol = &dev->vol;
1561 struct imsm_map *map = vol->map;
1562 struct mdinfo *this;
1563 __u64 sz;
1564 int slot;
1565
1566 this = malloc(sizeof(*this));
1567 memset(this, 0, sizeof(*this));
1568 this->next = rest;
1569 rest = this;
1570
4f5bc454
DW		 1571 this->array.level = get_imsm_raid_level(map);
1572 this->array.raid_disks = map->num_members;
c2c087e6 1573 this->array.layout = imsm_level_to_layout(this->array.level);
4f5bc454
DW		 1574 this->array.md_minor = -1;
1575 this->array.ctime = 0;
1576 this->array.utime = 0;
1577 this->array.chunk_size = __le16_to_cpu(map->blocks_per_strip) << 9;
1578 this->array.state = !vol->dirty;
1579 this->container_member = i;
0fd5c350
DW		 1580 if (map->map_state == IMSM_T_STATE_UNINITIALIZED || dev->vol.dirty)
1581 this->resync_start = 0;
1582 else
1583 this->resync_start = ~0ULL;
1584
4f5bc454
DW		 1585 strncpy(this->name, (char *) dev->volume, MAX_RAID_SERIAL_LEN);
1586 this->name[MAX_RAID_SERIAL_LEN] = 0;
1587
159c3a1a
NB		 1588 sprintf(this->text_version, "/%s/%d",
1589 devnum2devname(st->container_dev),
1590 this->container_member);
1591
4f5bc454
DW		 1592 memset(this->uuid, 0, sizeof(this->uuid));
1593
1594 sz = __le32_to_cpu(dev->size_high);
1595 sz <<= 32;
1596 sz += __le32_to_cpu(dev->size_low);
1597 this->component_size = sz;
1598 this->array.size = this->component_size / 2;
1599
1600 for (slot = 0 ; slot < map->num_members; slot++) {
1601 struct imsm_disk *disk;
1602 struct mdinfo *info_d;
1603 struct dl *d;
1604 int idx;
1605 __u32 s;
1606
1607 idx = __le32_to_cpu(map->disk_ord_tbl[slot] & ~(0xff << 24));
1608 for (d = super->disks; d ; d = d->next)
1609 if (d->index == idx)
1610 break;
1611
1612 if (d == NULL)
1613 break; /* shouldn't this be continue ?? */
1614
1615 info_d = malloc(sizeof(*info_d));
1616 if (!info_d)
1617 break; /* ditto ?? */
1618 memset(info_d, 0, sizeof(*info_d));
1619 info_d->next = this->devs;
1620 this->devs = info_d;
1621
1622 disk = get_imsm_disk(mpb, idx);
1623 s = __le32_to_cpu(disk->status);
1624
1625 info_d->disk.number = d->index;
1626 info_d->disk.major = d->major;
1627 info_d->disk.minor = d->minor;
1628 info_d->disk.raid_disk = slot;
1629 info_d->disk.state = s & CONFIGURED_DISK ? (1 << MD_DISK_ACTIVE) : 0;
1630 info_d->disk.state |= s & FAILED_DISK ? (1 << MD_DISK_FAULTY) : 0;
1631 info_d->disk.state |= s & USABLE_DISK ? (1 << MD_DISK_SYNC) : 0;
1632
1633 this->array.working_disks++;
1634
1635 info_d->events = __le32_to_cpu(mpb->generation_num);
1636 info_d->data_offset = __le32_to_cpu(map->pba_of_lba0);
1637 info_d->component_size = __le32_to_cpu(map->blocks_per_member);
1638 if (d->devname)
1639 strcpy(info_d->name, d->devname);
1640 }
1641 }
1642
1643 return rest;
cdddbdbc
DW		 1644}
1645
845dea95 1646
cba0191b
NB		 1647static int imsm_open_new(struct supertype *c, struct active_array *a,
1648 char *inst)
845dea95 1649{
4e6e574a 1650 dprintf("imsm: open_new %s\n", inst);
cba0191b 1651 a->info.container_member = atoi(inst);
845dea95
NB		 1652 return 0;
1653}
1654
c2a1e7da
DW		 1655static __u8 imsm_check_degraded(struct imsm_super *mpb, int n, int failed)
1656{
1657 struct imsm_dev *dev = get_imsm_dev(mpb, n);
1658 struct imsm_map *map = dev->vol.map;
1659
1660 if (!failed)
1661 return map->map_state;
1662
1663 switch (get_imsm_raid_level(map)) {
1664 case 0:
1665 return IMSM_T_STATE_FAILED;
1666 break;
1667 case 1:
1668 if (failed < map->num_members)
1669 return IMSM_T_STATE_DEGRADED;
1670 else
1671 return IMSM_T_STATE_FAILED;
1672 break;
1673 case 10:
1674 {
1675 /**
1676 * check to see if any mirrors have failed,
1677 * otherwise we are degraded
1678 */
1679 int device_per_mirror = 2; /* FIXME is this always the case?
1680 * and are they always adjacent?
1681 */
1682 int failed = 0;
1683 int i;
1684
1685 for (i = 0; i < map->num_members; i++) {
1686 int idx = get_imsm_disk_idx(map, i);
1687 struct imsm_disk *disk = get_imsm_disk(mpb, idx);
1688
1689 if (__le32_to_cpu(disk->status) & FAILED_DISK)
1690 failed++;
1691
1692 if (failed >= device_per_mirror)
1693 return IMSM_T_STATE_FAILED;
1694
1695 /* reset 'failed' for next mirror set */
1696 if (!((i + 1) % device_per_mirror))
1697 failed = 0;
1698 }
1699
1700 return IMSM_T_STATE_DEGRADED;
1701 }
1702 case 5:
1703 if (failed < 2)
1704 return IMSM_T_STATE_DEGRADED;
1705 else
1706 return IMSM_T_STATE_FAILED;
1707 break;
1708 default:
1709 break;
1710 }
1711
1712 return map->map_state;
1713}
1714
1715static int imsm_count_failed(struct imsm_super *mpb, struct imsm_map *map)
1716{
1717 int i;
1718 int failed = 0;
1719 struct imsm_disk *disk;
1720
1721 for (i = 0; i < map->num_members; i++) {
1722 int idx = get_imsm_disk_idx(map, i);
1723
1724 disk = get_imsm_disk(mpb, idx);
1725 if (__le32_to_cpu(disk->status) & FAILED_DISK)
1726 failed++;
1727 }
1728
1729 return failed;
845dea95
NB		 1730}
1731
a862209d
DW		 1732static void imsm_set_array_state(struct active_array *a, int consistent)
1733{
1734 int inst = a->info.container_member;
1735 struct intel_super *super = a->container->sb;
1736 struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
1737 struct imsm_map *map = &dev->vol.map[0];
1738 int dirty = !consistent;
1739 int failed;
1740 __u8 map_state;
1741
1742 if (a->resync_start == ~0ULL) {
1743 failed = imsm_count_failed(super->mpb, map);
1744 map_state = imsm_check_degraded(super->mpb, inst, failed);
1745 if (!failed)
1746 map_state = IMSM_T_STATE_NORMAL;
1747 if (map->map_state != map_state) {
4e6e574a 1748 dprintf("imsm: map_state %d: %d\n",
a862209d
DW		 1749 inst, map_state);
1750 map->map_state = map_state;
1751 super->updates_pending++;
1752 }
1753 }
1754
1755 if (dev->vol.dirty != dirty) {
4e6e574a 1756 dprintf("imsm: mark '%s' (%llu)\n",
a862209d
DW		 1757 dirty?"dirty":"clean", a->resync_start);
1758
1759 dev->vol.dirty = dirty;
1760 super->updates_pending++;
1761 }
1762}
1763
8d45d196 1764static void imsm_set_disk(struct active_array *a, int n, int state)
845dea95 1765{
8d45d196
DW		 1766 int inst = a->info.container_member;
1767 struct intel_super *super = a->container->sb;
1768 struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
1769 struct imsm_map *map = dev->vol.map;
1770 struct imsm_disk *disk;
1771 __u32 status;
1772 int failed = 0;
1773 int new_failure = 0;
1774
1775 if (n > map->num_members)
1776 fprintf(stderr, "imsm: set_disk %d out of range 0..%d\n",
1777 n, map->num_members - 1);
1778
1779 if (n < 0)
1780 return;
1781
4e6e574a 1782 dprintf("imsm: set_disk %d:%x\n", n, state);
8d45d196
DW		 1783
1784 disk = get_imsm_disk(super->mpb, get_imsm_disk_idx(map, n));
1785
1786 /* check if we have seen this failure before */
1787 status = __le32_to_cpu(disk->status);
1788 if ((state & DS_FAULTY) && !(status & FAILED_DISK)) {
1789 status |= FAILED_DISK;
1790 disk->status = __cpu_to_le32(status);
1791 new_failure = 1;
1792 }
1793
1794 /**
1795 * the number of failures have changed, count up 'failed' to determine
1796 * degraded / failed status
1797 */
1798 if (new_failure && map->map_state != IMSM_T_STATE_FAILED)
1799 failed = imsm_count_failed(super->mpb, map);
1800
1801 if (failed)
1802 map->map_state = imsm_check_degraded(super->mpb, inst, failed);
1803
1804 if (new_failure)
1805 super->updates_pending++;
845dea95
NB		 1806}
1807
c2a1e7da
DW		 1808static int store_imsm_mpb(int fd, struct intel_super *super)
1809{
1810 struct imsm_super *mpb = super->mpb;
1811 __u32 mpb_size = __le32_to_cpu(mpb->mpb_size);
1812 unsigned long long dsize;
1813 unsigned long long sectors;
1814
1815 get_dev_size(fd, NULL, &dsize);
1816
272f648f
DW		 1817 if (mpb_size > 512) {
1818 /* -1 to account for anchor */
1819 sectors = mpb_sectors(mpb) - 1;
c2a1e7da 1820
272f648f
DW		 1821 /* write the extended mpb to the sectors preceeding the anchor */
1822 if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0)
1823 return 1;
c2a1e7da 1824
272f648f
DW		 1825 if (write(fd, super->buf + 512, mpb_size - 512) != mpb_size - 512)
1826 return 1;
1827 }
c2a1e7da 1828
272f648f
DW		 1829 /* first block is stored on second to last sector of the disk */
1830 if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
c2a1e7da
DW		 1831 return 1;
1832
272f648f 1833 if (write(fd, super->buf, 512) != 512)
c2a1e7da
DW		 1834 return 1;
1835
1836 fsync(fd);
1837
1838 return 0;
1839}
1840
2e735d19 1841static void imsm_sync_metadata(struct supertype *container)
845dea95 1842{
2e735d19 1843 struct intel_super *super = container->sb;
c2a1e7da
DW		 1844
1845 if (!super->updates_pending)
1846 return;
1847
c2c087e6 1848 write_super_imsm(super, 0);
c2a1e7da
DW		 1849
1850 super->updates_pending = 0;
845dea95
NB		 1851}
1852
cdddbdbc
DW		 1853struct superswitch super_imsm = {
1854#ifndef MDASSEMBLE
1855 .examine_super = examine_super_imsm,
1856 .brief_examine_super = brief_examine_super_imsm,
1857 .detail_super = detail_super_imsm,
1858 .brief_detail_super = brief_detail_super_imsm,
1859#endif
1860 .match_home = match_home_imsm,
1861 .uuid_from_super= uuid_from_super_imsm,
1862 .getinfo_super = getinfo_super_imsm,
1863 .update_super = update_super_imsm,
1864
1865 .avail_size = avail_size_imsm,
1866
1867 .compare_super = compare_super_imsm,
1868
1869 .load_super = load_super_imsm,
1870 .init_super = init_zero_imsm,
1871 .store_super = store_zero_imsm,
1872 .free_super = free_super_imsm,
1873 .match_metadata_desc = match_metadata_desc_imsm,
f352c545 1874 .getinfo_super_n = getinfo_super_n_imsm_container,
cdddbdbc
DW		 1875
1876 .validate_geometry = validate_geometry_imsm,
cdddbdbc
DW		 1877 .swapuuid = 0,
1878 .external = 1,
845dea95
NB		 1879
1880/* for mdmon */
1881 .open_new = imsm_open_new,
1882 .load_super = load_super_imsm,
ed9d66aa 1883 .set_array_state= imsm_set_array_state,
845dea95
NB		 1884 .set_disk = imsm_set_disk,
1885 .sync_metadata = imsm_sync_metadata,
cdddbdbc
DW		 1886};
1887
1888/* super_imsm_container is set by validate_geometry_imsm when given a
1889 * device that is not part of any array
1890 */
1891struct superswitch super_imsm_container = {
1892
1893 .validate_geometry = validate_geometry_imsm_container,
1894 .init_super = init_super_imsm,
1895 .add_to_super = add_to_super_imsm,
1896 .write_init_super = write_init_super_imsm,
1897 .getinfo_super = getinfo_super_imsm,
f352c545 1898 .getinfo_super_n = getinfo_super_n_imsm_container,
cdddbdbc
DW		 1899 .load_super = load_super_imsm,
1900
1901#ifndef MDASSEMBLE
1902 .examine_super = examine_super_imsm,
1903 .brief_examine_super = brief_examine_super_imsm,
1904 .detail_super = detail_super_imsm,
1905 .brief_detail_super = brief_detail_super_imsm,
1906#endif
1907
1908 .free_super = free_super_imsm,
1909
1910 .container_content = container_content_imsm,
1911
cdddbdbc
DW		 1912 .swapuuid = 0,
1913 .external = 1,
cdddbdbc
DW		 1914};
1915
0063ecba 1916static struct superswitch super_imsm_volume = {
cdddbdbc 1917 .update_super = update_super_imsm,
8b353278
DW		 1918 .init_super = init_super_imsm_volume,
1919 .add_to_super = add_to_super_imsm_volume,
1920 .getinfo_super = getinfo_super_imsm_volume,
1921 .getinfo_super_n = getinfo_super_n_imsm_volume,
cdddbdbc
DW		 1922 .write_init_super = write_init_super_imsm,
1923
1924 .load_super = load_super_imsm,
1925 .free_super = free_super_imsm,
8b353278 1926 .match_metadata_desc = match_metadata_desc_imsm_volume,
cdddbdbc
DW		 1927
1928
8b353278 1929 .validate_geometry = validate_geometry_imsm_volume,
cdddbdbc
DW		 1930 .swapuuid = 0,
1931 .external = 2,
cdddbdbc 1932};
Unnamed repository; edit this file 'description' to name the repository.