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1 /*
2 * mdadm - Intel(R) Matrix Storage Manager Support
3 *
4 * Copyright (C) 2002-2008 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 #define HAVE_STDINT_H 1
21 #include "mdadm.h"
22 #include "mdmon.h"
23 #include "sha1.h"
24 #include "platform-intel.h"
25 #include <values.h>
26 #include <scsi/sg.h>
27 #include <ctype.h>
28 #include <dirent.h>
29
30 /* MPB == Metadata Parameter Block */
31 #define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. "
32 #define MPB_SIG_LEN (strlen(MPB_SIGNATURE))
33 #define MPB_VERSION_RAID0 "1.0.00"
34 #define MPB_VERSION_RAID1 "1.1.00"
35 #define MPB_VERSION_MANY_VOLUMES_PER_ARRAY "1.2.00"
36 #define MPB_VERSION_3OR4_DISK_ARRAY "1.2.01"
37 #define MPB_VERSION_RAID5 "1.2.02"
38 #define MPB_VERSION_5OR6_DISK_ARRAY "1.2.04"
39 #define MPB_VERSION_CNG "1.2.06"
40 #define MPB_VERSION_ATTRIBS "1.3.00"
41 #define MAX_SIGNATURE_LENGTH 32
42 #define MAX_RAID_SERIAL_LEN 16
43
44 #define MPB_ATTRIB_CHECKSUM_VERIFY __cpu_to_le32(0x80000000)
45 #define MPB_ATTRIB_PM __cpu_to_le32(0x40000000)
46 #define MPB_ATTRIB_2TB __cpu_to_le32(0x20000000)
47 #define MPB_ATTRIB_RAID0 __cpu_to_le32(0x00000001)
48 #define MPB_ATTRIB_RAID1 __cpu_to_le32(0x00000002)
49 #define MPB_ATTRIB_RAID10 __cpu_to_le32(0x00000004)
50 #define MPB_ATTRIB_RAID1E __cpu_to_le32(0x00000008)
51 #define MPB_ATTRIB_RAID5 __cpu_to_le32(0x00000010)
52 #define MPB_ATTRIB_RAIDCNG __cpu_to_le32(0x00000020)
53
54 #define MPB_SECTOR_CNT 418
55 #define IMSM_RESERVED_SECTORS 4096
56 #define SECT_PER_MB_SHIFT 11
57
58 /* Disk configuration info. */
59 #define IMSM_MAX_DEVICES 255
60 struct imsm_disk {
61 __u8 serial[MAX_RAID_SERIAL_LEN];/* 0xD8 - 0xE7 ascii serial number */
62 __u32 total_blocks; /* 0xE8 - 0xEB total blocks */
63 __u32 scsi_id; /* 0xEC - 0xEF scsi ID */
64 #define SPARE_DISK __cpu_to_le32(0x01) /* Spare */
65 #define CONFIGURED_DISK __cpu_to_le32(0x02) /* Member of some RaidDev */
66 #define FAILED_DISK __cpu_to_le32(0x04) /* Permanent failure */
67 #define USABLE_DISK __cpu_to_le32(0x08) /* Fully usable unless FAILED_DISK is set */
68 __u32 status; /* 0xF0 - 0xF3 */
69 __u32 owner_cfg_num; /* which config 0,1,2... owns this disk */
70 #define IMSM_DISK_FILLERS 4
71 __u32 filler[IMSM_DISK_FILLERS]; /* 0xF4 - 0x107 MPB_DISK_FILLERS for future expansion */
72 };
73
74 /* RAID map configuration infos. */
75 struct imsm_map {
76 __u32 pba_of_lba0; /* start address of partition */
77 __u32 blocks_per_member;/* blocks per member */
78 __u32 num_data_stripes; /* number of data stripes */
79 __u16 blocks_per_strip;
80 __u8 map_state; /* Normal, Uninitialized, Degraded, Failed */
81 #define IMSM_T_STATE_NORMAL 0
82 #define IMSM_T_STATE_UNINITIALIZED 1
83 #define IMSM_T_STATE_DEGRADED 2
84 #define IMSM_T_STATE_FAILED 3
85 __u8 raid_level;
86 #define IMSM_T_RAID0 0
87 #define IMSM_T_RAID1 1
88 #define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */
89 __u8 num_members; /* number of member disks */
90 __u8 num_domains; /* number of parity domains */
91 __u8 failed_disk_num; /* valid only when state is degraded */
92 __u8 ddf;
93 __u32 filler[7]; /* expansion area */
94 #define IMSM_ORD_REBUILD (1 << 24)
95 __u32 disk_ord_tbl[1]; /* disk_ord_tbl[num_members],
96 * top byte contains some flags
97 */
98 } __attribute__ ((packed));
99
100 struct imsm_vol {
101 __u32 curr_migr_unit;
102 __u32 checkpoint_id; /* id to access curr_migr_unit */
103 __u8 migr_state; /* Normal or Migrating */
104 #define MIGR_INIT 0
105 #define MIGR_REBUILD 1
106 #define MIGR_VERIFY 2 /* analagous to echo check > sync_action */
107 #define MIGR_GEN_MIGR 3
108 #define MIGR_STATE_CHANGE 4
109 #define MIGR_REPAIR 5
110 __u8 migr_type; /* Initializing, Rebuilding, ... */
111 __u8 dirty;
112 __u8 fs_state; /* fast-sync state for CnG (0xff == disabled) */
113 __u16 verify_errors; /* number of mismatches */
114 __u16 bad_blocks; /* number of bad blocks during verify */
115 __u32 filler[4];
116 struct imsm_map map[1];
117 /* here comes another one if migr_state */
118 } __attribute__ ((packed));
119
120 struct imsm_dev {
121 __u8 volume[MAX_RAID_SERIAL_LEN];
122 __u32 size_low;
123 __u32 size_high;
124 #define DEV_BOOTABLE __cpu_to_le32(0x01)
125 #define DEV_BOOT_DEVICE __cpu_to_le32(0x02)
126 #define DEV_READ_COALESCING __cpu_to_le32(0x04)
127 #define DEV_WRITE_COALESCING __cpu_to_le32(0x08)
128 #define DEV_LAST_SHUTDOWN_DIRTY __cpu_to_le32(0x10)
129 #define DEV_HIDDEN_AT_BOOT __cpu_to_le32(0x20)
130 #define DEV_CURRENTLY_HIDDEN __cpu_to_le32(0x40)
131 #define DEV_VERIFY_AND_FIX __cpu_to_le32(0x80)
132 #define DEV_MAP_STATE_UNINIT __cpu_to_le32(0x100)
133 #define DEV_NO_AUTO_RECOVERY __cpu_to_le32(0x200)
134 #define DEV_CLONE_N_GO __cpu_to_le32(0x400)
135 #define DEV_CLONE_MAN_SYNC __cpu_to_le32(0x800)
136 #define DEV_CNG_MASTER_DISK_NUM __cpu_to_le32(0x1000)
137 __u32 status; /* Persistent RaidDev status */
138 __u32 reserved_blocks; /* Reserved blocks at beginning of volume */
139 __u8 migr_priority;
140 __u8 num_sub_vols;
141 __u8 tid;
142 __u8 cng_master_disk;
143 __u16 cache_policy;
144 __u8 cng_state;
145 __u8 cng_sub_state;
146 #define IMSM_DEV_FILLERS 10
147 __u32 filler[IMSM_DEV_FILLERS];
148 struct imsm_vol vol;
149 } __attribute__ ((packed));
150
151 struct imsm_super {
152 __u8 sig[MAX_SIGNATURE_LENGTH]; /* 0x00 - 0x1F */
153 __u32 check_sum; /* 0x20 - 0x23 MPB Checksum */
154 __u32 mpb_size; /* 0x24 - 0x27 Size of MPB */
155 __u32 family_num; /* 0x28 - 0x2B Checksum from first time this config was written */
156 __u32 generation_num; /* 0x2C - 0x2F Incremented each time this array's MPB is written */
157 __u32 error_log_size; /* 0x30 - 0x33 in bytes */
158 __u32 attributes; /* 0x34 - 0x37 */
159 __u8 num_disks; /* 0x38 Number of configured disks */
160 __u8 num_raid_devs; /* 0x39 Number of configured volumes */
161 __u8 error_log_pos; /* 0x3A */
162 __u8 fill[1]; /* 0x3B */
163 __u32 cache_size; /* 0x3c - 0x40 in mb */
164 __u32 orig_family_num; /* 0x40 - 0x43 original family num */
165 __u32 pwr_cycle_count; /* 0x44 - 0x47 simulated power cycle count for array */
166 __u32 bbm_log_size; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */
167 #define IMSM_FILLERS 35
168 __u32 filler[IMSM_FILLERS]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */
169 struct imsm_disk disk[1]; /* 0xD8 diskTbl[numDisks] */
170 /* here comes imsm_dev[num_raid_devs] */
171 /* here comes BBM logs */
172 } __attribute__ ((packed));
173
174 #define BBM_LOG_MAX_ENTRIES 254
175
176 struct bbm_log_entry {
177 __u64 defective_block_start;
178 #define UNREADABLE 0xFFFFFFFF
179 __u32 spare_block_offset;
180 __u16 remapped_marked_count;
181 __u16 disk_ordinal;
182 } __attribute__ ((__packed__));
183
184 struct bbm_log {
185 __u32 signature; /* 0xABADB10C */
186 __u32 entry_count;
187 __u32 reserved_spare_block_count; /* 0 */
188 __u32 reserved; /* 0xFFFF */
189 __u64 first_spare_lba;
190 struct bbm_log_entry mapped_block_entries[BBM_LOG_MAX_ENTRIES];
191 } __attribute__ ((__packed__));
192
193
194 #ifndef MDASSEMBLE
195 static char *map_state_str[] = { "normal", "uninitialized", "degraded", "failed" };
196 #endif
197
198 static __u8 migr_type(struct imsm_dev *dev)
199 {
200 if (dev->vol.migr_type == MIGR_VERIFY &&
201 dev->status & DEV_VERIFY_AND_FIX)
202 return MIGR_REPAIR;
203 else
204 return dev->vol.migr_type;
205 }
206
207 static void set_migr_type(struct imsm_dev *dev, __u8 migr_type)
208 {
209 /* for compatibility with older oroms convert MIGR_REPAIR, into
210 * MIGR_VERIFY w/ DEV_VERIFY_AND_FIX status
211 */
212 if (migr_type == MIGR_REPAIR) {
213 dev->vol.migr_type = MIGR_VERIFY;
214 dev->status |= DEV_VERIFY_AND_FIX;
215 } else {
216 dev->vol.migr_type = migr_type;
217 dev->status &= ~DEV_VERIFY_AND_FIX;
218 }
219 }
220
221 static unsigned int sector_count(__u32 bytes)
222 {
223 return ((bytes + (512-1)) & (~(512-1))) / 512;
224 }
225
226 static unsigned int mpb_sectors(struct imsm_super *mpb)
227 {
228 return sector_count(__le32_to_cpu(mpb->mpb_size));
229 }
230
231 struct intel_dev {
232 struct imsm_dev *dev;
233 struct intel_dev *next;
234 int index;
235 };
236
237 /* internal representation of IMSM metadata */
238 struct intel_super {
239 union {
240 void *buf; /* O_DIRECT buffer for reading/writing metadata */
241 struct imsm_super *anchor; /* immovable parameters */
242 };
243 size_t len; /* size of the 'buf' allocation */
244 void *next_buf; /* for realloc'ing buf from the manager */
245 size_t next_len;
246 int updates_pending; /* count of pending updates for mdmon */
247 int creating_imsm; /* flag to indicate container creation */
248 int current_vol; /* index of raid device undergoing creation */
249 __u32 create_offset; /* common start for 'current_vol' */
250 struct intel_dev *devlist;
251 struct dl {
252 struct dl *next;
253 int index;
254 __u8 serial[MAX_RAID_SERIAL_LEN];
255 int major, minor;
256 char *devname;
257 struct imsm_disk disk;
258 int fd;
259 int extent_cnt;
260 struct extent *e; /* for determining freespace @ create */
261 int raiddisk; /* slot to fill in autolayout */
262 } *disks;
263 struct dl *add; /* list of disks to add while mdmon active */
264 struct dl *missing; /* disks removed while we weren't looking */
265 struct bbm_log *bbm_log;
266 const char *hba; /* device path of the raid controller for this metadata */
267 const struct imsm_orom *orom; /* platform firmware support */
268 };
269
270 struct extent {
271 unsigned long long start, size;
272 };
273
274 /* definition of messages passed to imsm_process_update */
275 enum imsm_update_type {
276 update_activate_spare,
277 update_create_array,
278 update_add_disk,
279 };
280
281 struct imsm_update_activate_spare {
282 enum imsm_update_type type;
283 struct dl *dl;
284 int slot;
285 int array;
286 struct imsm_update_activate_spare *next;
287 };
288
289 struct disk_info {
290 __u8 serial[MAX_RAID_SERIAL_LEN];
291 };
292
293 struct imsm_update_create_array {
294 enum imsm_update_type type;
295 int dev_idx;
296 struct imsm_dev dev;
297 };
298
299 struct imsm_update_add_disk {
300 enum imsm_update_type type;
301 };
302
303 static struct supertype *match_metadata_desc_imsm(char *arg)
304 {
305 struct supertype *st;
306
307 if (strcmp(arg, "imsm") != 0 &&
308 strcmp(arg, "default") != 0
309 )
310 return NULL;
311
312 st = malloc(sizeof(*st));
313 memset(st, 0, sizeof(*st));
314 st->ss = &super_imsm;
315 st->max_devs = IMSM_MAX_DEVICES;
316 st->minor_version = 0;
317 st->sb = NULL;
318 return st;
319 }
320
321 #ifndef MDASSEMBLE
322 static __u8 *get_imsm_version(struct imsm_super *mpb)
323 {
324 return &mpb->sig[MPB_SIG_LEN];
325 }
326 #endif
327
328 /* retrieve a disk directly from the anchor when the anchor is known to be
329 * up-to-date, currently only at load time
330 */
331 static struct imsm_disk *__get_imsm_disk(struct imsm_super *mpb, __u8 index)
332 {
333 if (index >= mpb->num_disks)
334 return NULL;
335 return &mpb->disk[index];
336 }
337
338 #ifndef MDASSEMBLE
339 /* retrieve a disk from the parsed metadata */
340 static struct imsm_disk *get_imsm_disk(struct intel_super *super, __u8 index)
341 {
342 struct dl *d;
343
344 for (d = super->disks; d; d = d->next)
345 if (d->index == index)
346 return &d->disk;
347
348 return NULL;
349 }
350 #endif
351
352 /* generate a checksum directly from the anchor when the anchor is known to be
353 * up-to-date, currently only at load or write_super after coalescing
354 */
355 static __u32 __gen_imsm_checksum(struct imsm_super *mpb)
356 {
357 __u32 end = mpb->mpb_size / sizeof(end);
358 __u32 *p = (__u32 *) mpb;
359 __u32 sum = 0;
360
361 while (end--) {
362 sum += __le32_to_cpu(*p);
363 p++;
364 }
365
366 return sum - __le32_to_cpu(mpb->check_sum);
367 }
368
369 static size_t sizeof_imsm_map(struct imsm_map *map)
370 {
371 return sizeof(struct imsm_map) + sizeof(__u32) * (map->num_members - 1);
372 }
373
374 struct imsm_map *get_imsm_map(struct imsm_dev *dev, int second_map)
375 {
376 struct imsm_map *map = &dev->vol.map[0];
377
378 if (second_map && !dev->vol.migr_state)
379 return NULL;
380 else if (second_map) {
381 void *ptr = map;
382
383 return ptr + sizeof_imsm_map(map);
384 } else
385 return map;
386
387 }
388
389 /* return the size of the device.
390 * migr_state increases the returned size if map[0] were to be duplicated
391 */
392 static size_t sizeof_imsm_dev(struct imsm_dev *dev, int migr_state)
393 {
394 size_t size = sizeof(*dev) - sizeof(struct imsm_map) +
395 sizeof_imsm_map(get_imsm_map(dev, 0));
396
397 /* migrating means an additional map */
398 if (dev->vol.migr_state)
399 size += sizeof_imsm_map(get_imsm_map(dev, 1));
400 else if (migr_state)
401 size += sizeof_imsm_map(get_imsm_map(dev, 0));
402
403 return size;
404 }
405
406 #ifndef MDASSEMBLE
407 /* retrieve disk serial number list from a metadata update */
408 static struct disk_info *get_disk_info(struct imsm_update_create_array *update)
409 {
410 void *u = update;
411 struct disk_info *inf;
412
413 inf = u + sizeof(*update) - sizeof(struct imsm_dev) +
414 sizeof_imsm_dev(&update->dev, 0);
415
416 return inf;
417 }
418 #endif
419
420 static struct imsm_dev *__get_imsm_dev(struct imsm_super *mpb, __u8 index)
421 {
422 int offset;
423 int i;
424 void *_mpb = mpb;
425
426 if (index >= mpb->num_raid_devs)
427 return NULL;
428
429 /* devices start after all disks */
430 offset = ((void *) &mpb->disk[mpb->num_disks]) - _mpb;
431
432 for (i = 0; i <= index; i++)
433 if (i == index)
434 return _mpb + offset;
435 else
436 offset += sizeof_imsm_dev(_mpb + offset, 0);
437
438 return NULL;
439 }
440
441 static struct imsm_dev *get_imsm_dev(struct intel_super *super, __u8 index)
442 {
443 struct intel_dev *dv;
444
445 if (index >= super->anchor->num_raid_devs)
446 return NULL;
447 for (dv = super->devlist; dv; dv = dv->next)
448 if (dv->index == index)
449 return dv->dev;
450 return NULL;
451 }
452
453 static __u32 get_imsm_ord_tbl_ent(struct imsm_dev *dev, int slot)
454 {
455 struct imsm_map *map;
456
457 if (dev->vol.migr_state)
458 map = get_imsm_map(dev, 1);
459 else
460 map = get_imsm_map(dev, 0);
461
462 /* top byte identifies disk under rebuild */
463 return __le32_to_cpu(map->disk_ord_tbl[slot]);
464 }
465
466 #define ord_to_idx(ord) (((ord) << 8) >> 8)
467 static __u32 get_imsm_disk_idx(struct imsm_dev *dev, int slot)
468 {
469 __u32 ord = get_imsm_ord_tbl_ent(dev, slot);
470
471 return ord_to_idx(ord);
472 }
473
474 static void set_imsm_ord_tbl_ent(struct imsm_map *map, int slot, __u32 ord)
475 {
476 map->disk_ord_tbl[slot] = __cpu_to_le32(ord);
477 }
478
479 static int get_imsm_disk_slot(struct imsm_map *map, int idx)
480 {
481 int slot;
482 __u32 ord;
483
484 for (slot = 0; slot < map->num_members; slot++) {
485 ord = __le32_to_cpu(map->disk_ord_tbl[slot]);
486 if (ord_to_idx(ord) == idx)
487 return slot;
488 }
489
490 return -1;
491 }
492
493 static int get_imsm_raid_level(struct imsm_map *map)
494 {
495 if (map->raid_level == 1) {
496 if (map->num_members == 2)
497 return 1;
498 else
499 return 10;
500 }
501
502 return map->raid_level;
503 }
504
505 static int cmp_extent(const void *av, const void *bv)
506 {
507 const struct extent *a = av;
508 const struct extent *b = bv;
509 if (a->start < b->start)
510 return -1;
511 if (a->start > b->start)
512 return 1;
513 return 0;
514 }
515
516 static int count_memberships(struct dl *dl, struct intel_super *super)
517 {
518 int memberships = 0;
519 int i;
520
521 for (i = 0; i < super->anchor->num_raid_devs; i++) {
522 struct imsm_dev *dev = get_imsm_dev(super, i);
523 struct imsm_map *map = get_imsm_map(dev, 0);
524
525 if (get_imsm_disk_slot(map, dl->index) >= 0)
526 memberships++;
527 }
528
529 return memberships;
530 }
531
532 static struct extent *get_extents(struct intel_super *super, struct dl *dl)
533 {
534 /* find a list of used extents on the given physical device */
535 struct extent *rv, *e;
536 int i;
537 int memberships = count_memberships(dl, super);
538 __u32 reservation = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
539
540 rv = malloc(sizeof(struct extent) * (memberships + 1));
541 if (!rv)
542 return NULL;
543 e = rv;
544
545 for (i = 0; i < super->anchor->num_raid_devs; i++) {
546 struct imsm_dev *dev = get_imsm_dev(super, i);
547 struct imsm_map *map = get_imsm_map(dev, 0);
548
549 if (get_imsm_disk_slot(map, dl->index) >= 0) {
550 e->start = __le32_to_cpu(map->pba_of_lba0);
551 e->size = __le32_to_cpu(map->blocks_per_member);
552 e++;
553 }
554 }
555 qsort(rv, memberships, sizeof(*rv), cmp_extent);
556
557 /* determine the start of the metadata
558 * when no raid devices are defined use the default
559 * ...otherwise allow the metadata to truncate the value
560 * as is the case with older versions of imsm
561 */
562 if (memberships) {
563 struct extent *last = &rv[memberships - 1];
564 __u32 remainder;
565
566 remainder = __le32_to_cpu(dl->disk.total_blocks) -
567 (last->start + last->size);
568 /* round down to 1k block to satisfy precision of the kernel
569 * 'size' interface
570 */
571 remainder &= ~1UL;
572 /* make sure remainder is still sane */
573 if (remainder < ROUND_UP(super->len, 512) >> 9)
574 remainder = ROUND_UP(super->len, 512) >> 9;
575 if (reservation > remainder)
576 reservation = remainder;
577 }
578 e->start = __le32_to_cpu(dl->disk.total_blocks) - reservation;
579 e->size = 0;
580 return rv;
581 }
582
583 /* try to determine how much space is reserved for metadata from
584 * the last get_extents() entry, otherwise fallback to the
585 * default
586 */
587 static __u32 imsm_reserved_sectors(struct intel_super *super, struct dl *dl)
588 {
589 struct extent *e;
590 int i;
591 __u32 rv;
592
593 /* for spares just return a minimal reservation which will grow
594 * once the spare is picked up by an array
595 */
596 if (dl->index == -1)
597 return MPB_SECTOR_CNT;
598
599 e = get_extents(super, dl);
600 if (!e)
601 return MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
602
603 /* scroll to last entry */
604 for (i = 0; e[i].size; i++)
605 continue;
606
607 rv = __le32_to_cpu(dl->disk.total_blocks) - e[i].start;
608
609 free(e);
610
611 return rv;
612 }
613
614 #ifndef MDASSEMBLE
615 static void print_imsm_dev(struct imsm_dev *dev, char *uuid, int disk_idx)
616 {
617 __u64 sz;
618 int slot;
619 struct imsm_map *map = get_imsm_map(dev, 0);
620 __u32 ord;
621
622 printf("\n");
623 printf("[%.16s]:\n", dev->volume);
624 printf(" UUID : %s\n", uuid);
625 printf(" RAID Level : %d\n", get_imsm_raid_level(map));
626 printf(" Members : %d\n", map->num_members);
627 slot = get_imsm_disk_slot(map, disk_idx);
628 if (slot >= 0) {
629 ord = get_imsm_ord_tbl_ent(dev, slot);
630 printf(" This Slot : %d%s\n", slot,
631 ord & IMSM_ORD_REBUILD ? " (out-of-sync)" : "");
632 } else
633 printf(" This Slot : ?\n");
634 sz = __le32_to_cpu(dev->size_high);
635 sz <<= 32;
636 sz += __le32_to_cpu(dev->size_low);
637 printf(" Array Size : %llu%s\n", (unsigned long long)sz,
638 human_size(sz * 512));
639 sz = __le32_to_cpu(map->blocks_per_member);
640 printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz,
641 human_size(sz * 512));
642 printf(" Sector Offset : %u\n",
643 __le32_to_cpu(map->pba_of_lba0));
644 printf(" Num Stripes : %u\n",
645 __le32_to_cpu(map->num_data_stripes));
646 printf(" Chunk Size : %u KiB\n",
647 __le16_to_cpu(map->blocks_per_strip) / 2);
648 printf(" Reserved : %d\n", __le32_to_cpu(dev->reserved_blocks));
649 printf(" Migrate State : %s", dev->vol.migr_state ? "migrating" : "idle\n");
650 if (dev->vol.migr_state) {
651 if (migr_type(dev) == MIGR_INIT)
652 printf(": initializing\n");
653 else if (migr_type(dev) == MIGR_REBUILD)
654 printf(": rebuilding\n");
655 else if (migr_type(dev) == MIGR_VERIFY)
656 printf(": check\n");
657 else if (migr_type(dev) == MIGR_GEN_MIGR)
658 printf(": general migration\n");
659 else if (migr_type(dev) == MIGR_STATE_CHANGE)
660 printf(": state change\n");
661 else if (migr_type(dev) == MIGR_REPAIR)
662 printf(": repair\n");
663 else
664 printf(": <unknown:%d>\n", migr_type(dev));
665 }
666 printf(" Map State : %s", map_state_str[map->map_state]);
667 if (dev->vol.migr_state) {
668 struct imsm_map *map = get_imsm_map(dev, 1);
669 printf(" <-- %s", map_state_str[map->map_state]);
670 }
671 printf("\n");
672 printf(" Dirty State : %s\n", dev->vol.dirty ? "dirty" : "clean");
673 }
674
675 static void print_imsm_disk(struct imsm_super *mpb, int index, __u32 reserved)
676 {
677 struct imsm_disk *disk = __get_imsm_disk(mpb, index);
678 char str[MAX_RAID_SERIAL_LEN + 1];
679 __u32 s;
680 __u64 sz;
681
682 if (index < 0)
683 return;
684
685 printf("\n");
686 snprintf(str, MAX_RAID_SERIAL_LEN + 1, "%s", disk->serial);
687 printf(" Disk%02d Serial : %s\n", index, str);
688 s = disk->status;
689 printf(" State :%s%s%s%s\n", s&SPARE_DISK ? " spare" : "",
690 s&CONFIGURED_DISK ? " active" : "",
691 s&FAILED_DISK ? " failed" : "",
692 s&USABLE_DISK ? " usable" : "");
693 printf(" Id : %08x\n", __le32_to_cpu(disk->scsi_id));
694 sz = __le32_to_cpu(disk->total_blocks) - reserved;
695 printf(" Usable Size : %llu%s\n", (unsigned long long)sz,
696 human_size(sz * 512));
697 }
698
699 static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info);
700
701 static void examine_super_imsm(struct supertype *st, char *homehost)
702 {
703 struct intel_super *super = st->sb;
704 struct imsm_super *mpb = super->anchor;
705 char str[MAX_SIGNATURE_LENGTH];
706 int i;
707 struct mdinfo info;
708 char nbuf[64];
709 __u32 sum;
710 __u32 reserved = imsm_reserved_sectors(super, super->disks);
711
712
713 snprintf(str, MPB_SIG_LEN, "%s", mpb->sig);
714 printf(" Magic : %s\n", str);
715 snprintf(str, strlen(MPB_VERSION_RAID0), "%s", get_imsm_version(mpb));
716 printf(" Version : %s\n", get_imsm_version(mpb));
717 printf(" Family : %08x\n", __le32_to_cpu(mpb->family_num));
718 printf(" Generation : %08x\n", __le32_to_cpu(mpb->generation_num));
719 getinfo_super_imsm(st, &info);
720 fname_from_uuid(st, &info, nbuf, ':');
721 printf(" UUID : %s\n", nbuf + 5);
722 sum = __le32_to_cpu(mpb->check_sum);
723 printf(" Checksum : %08x %s\n", sum,
724 __gen_imsm_checksum(mpb) == sum ? "correct" : "incorrect");
725 printf(" MPB Sectors : %d\n", mpb_sectors(mpb));
726 printf(" Disks : %d\n", mpb->num_disks);
727 printf(" RAID Devices : %d\n", mpb->num_raid_devs);
728 print_imsm_disk(mpb, super->disks->index, reserved);
729 if (super->bbm_log) {
730 struct bbm_log *log = super->bbm_log;
731
732 printf("\n");
733 printf("Bad Block Management Log:\n");
734 printf(" Log Size : %d\n", __le32_to_cpu(mpb->bbm_log_size));
735 printf(" Signature : %x\n", __le32_to_cpu(log->signature));
736 printf(" Entry Count : %d\n", __le32_to_cpu(log->entry_count));
737 printf(" Spare Blocks : %d\n", __le32_to_cpu(log->reserved_spare_block_count));
738 printf(" First Spare : %llx\n",
739 (unsigned long long) __le64_to_cpu(log->first_spare_lba));
740 }
741 for (i = 0; i < mpb->num_raid_devs; i++) {
742 struct mdinfo info;
743 struct imsm_dev *dev = __get_imsm_dev(mpb, i);
744
745 super->current_vol = i;
746 getinfo_super_imsm(st, &info);
747 fname_from_uuid(st, &info, nbuf, ':');
748 print_imsm_dev(dev, nbuf + 5, super->disks->index);
749 }
750 for (i = 0; i < mpb->num_disks; i++) {
751 if (i == super->disks->index)
752 continue;
753 print_imsm_disk(mpb, i, reserved);
754 }
755 }
756
757 static void brief_examine_super_imsm(struct supertype *st, int verbose)
758 {
759 /* We just write a generic IMSM ARRAY entry */
760 struct mdinfo info;
761 char nbuf[64];
762 char nbuf1[64];
763 struct intel_super *super = st->sb;
764 int i;
765
766 if (!super->anchor->num_raid_devs)
767 return;
768
769 getinfo_super_imsm(st, &info);
770 fname_from_uuid(st, &info, nbuf, ':');
771 for (i = 0; i < super->anchor->num_raid_devs; i++) {
772 struct imsm_dev *dev = get_imsm_dev(super, i);
773
774 super->current_vol = i;
775 getinfo_super_imsm(st, &info);
776 fname_from_uuid(st, &info, nbuf1, ':');
777 printf("ARRAY /dev/md/%.16s container=%s member=%d UUID=%s\n",
778 dev->volume, nbuf + 5, i, nbuf1 + 5);
779 }
780 printf("ARRAY metadata=imsm UUID=%s\n", nbuf + 5);
781 }
782
783 static void export_examine_super_imsm(struct supertype *st)
784 {
785 struct intel_super *super = st->sb;
786 struct imsm_super *mpb = super->anchor;
787 struct mdinfo info;
788 char nbuf[64];
789
790 getinfo_super_imsm(st, &info);
791 fname_from_uuid(st, &info, nbuf, ':');
792 printf("MD_METADATA=imsm\n");
793 printf("MD_LEVEL=container\n");
794 printf("MD_UUID=%s\n", nbuf+5);
795 printf("MD_DEVICES=%u\n", mpb->num_disks);
796 }
797
798 static void detail_super_imsm(struct supertype *st, char *homehost)
799 {
800 struct mdinfo info;
801 char nbuf[64];
802
803 getinfo_super_imsm(st, &info);
804 fname_from_uuid(st, &info, nbuf, ':');
805 printf("\n UUID : %s\n", nbuf + 5);
806 }
807
808 static void brief_detail_super_imsm(struct supertype *st)
809 {
810 struct mdinfo info;
811 char nbuf[64];
812 getinfo_super_imsm(st, &info);
813 fname_from_uuid(st, &info, nbuf, ':');
814 printf(" UUID=%s", nbuf + 5);
815 }
816
817 static int imsm_read_serial(int fd, char *devname, __u8 *serial);
818 static void fd2devname(int fd, char *name);
819
820 static int imsm_enumerate_ports(const char *hba_path, int port_count, int host_base, int verbose)
821 {
822 /* dump an unsorted list of devices attached to ahci, as well as
823 * non-connected ports
824 */
825 int hba_len = strlen(hba_path) + 1;
826 struct dirent *ent;
827 DIR *dir;
828 char *path = NULL;
829 int err = 0;
830 unsigned long port_mask = (1 << port_count) - 1;
831
832 if (port_count > sizeof(port_mask) * 8) {
833 if (verbose)
834 fprintf(stderr, Name ": port_count %d out of range\n", port_count);
835 return 2;
836 }
837
838 /* scroll through /sys/dev/block looking for devices attached to
839 * this hba
840 */
841 dir = opendir("/sys/dev/block");
842 for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) {
843 int fd;
844 char model[64];
845 char vendor[64];
846 char buf[1024];
847 int major, minor;
848 char *device;
849 char *c;
850 int port;
851 int type;
852
853 if (sscanf(ent->d_name, "%d:%d", &major, &minor) != 2)
854 continue;
855 path = devt_to_devpath(makedev(major, minor));
856 if (!path)
857 continue;
858 if (!path_attached_to_hba(path, hba_path)) {
859 free(path);
860 path = NULL;
861 continue;
862 }
863
864 /* retrieve the scsi device type */
865 if (asprintf(&device, "/sys/dev/block/%d:%d/device/xxxxxxx", major, minor) < 0) {
866 if (verbose)
867 fprintf(stderr, Name ": failed to allocate 'device'\n");
868 err = 2;
869 break;
870 }
871 sprintf(device, "/sys/dev/block/%d:%d/device/type", major, minor);
872 if (load_sys(device, buf) != 0) {
873 if (verbose)
874 fprintf(stderr, Name ": failed to read device type for %s\n",
875 path);
876 err = 2;
877 free(device);
878 break;
879 }
880 type = strtoul(buf, NULL, 10);
881
882 /* if it's not a disk print the vendor and model */
883 if (!(type == 0 || type == 7 || type == 14)) {
884 vendor[0] = '\0';
885 model[0] = '\0';
886 sprintf(device, "/sys/dev/block/%d:%d/device/vendor", major, minor);
887 if (load_sys(device, buf) == 0) {
888 strncpy(vendor, buf, sizeof(vendor));
889 vendor[sizeof(vendor) - 1] = '\0';
890 c = (char *) &vendor[sizeof(vendor) - 1];
891 while (isspace(*c) || *c == '\0')
892 *c-- = '\0';
893
894 }
895 sprintf(device, "/sys/dev/block/%d:%d/device/model", major, minor);
896 if (load_sys(device, buf) == 0) {
897 strncpy(model, buf, sizeof(model));
898 model[sizeof(model) - 1] = '\0';
899 c = (char *) &model[sizeof(model) - 1];
900 while (isspace(*c) || *c == '\0')
901 *c-- = '\0';
902 }
903
904 if (vendor[0] && model[0])
905 sprintf(buf, "%.64s %.64s", vendor, model);
906 else
907 switch (type) { /* numbers from hald/linux/device.c */
908 case 1: sprintf(buf, "tape"); break;
909 case 2: sprintf(buf, "printer"); break;
910 case 3: sprintf(buf, "processor"); break;
911 case 4:
912 case 5: sprintf(buf, "cdrom"); break;
913 case 6: sprintf(buf, "scanner"); break;
914 case 8: sprintf(buf, "media_changer"); break;
915 case 9: sprintf(buf, "comm"); break;
916 case 12: sprintf(buf, "raid"); break;
917 default: sprintf(buf, "unknown");
918 }
919 } else
920 buf[0] = '\0';
921 free(device);
922
923 /* chop device path to 'host%d' and calculate the port number */
924 c = strchr(&path[hba_len], '/');
925 *c = '\0';
926 if (sscanf(&path[hba_len], "host%d", &port) == 1)
927 port -= host_base;
928 else {
929 if (verbose) {
930 *c = '/'; /* repair the full string */
931 fprintf(stderr, Name ": failed to determine port number for %s\n",
932 path);
933 }
934 err = 2;
935 break;
936 }
937
938 /* mark this port as used */
939 port_mask &= ~(1 << port);
940
941 /* print out the device information */
942 if (buf[0]) {
943 printf(" Port%d : - non-disk device (%s) -\n", port, buf);
944 continue;
945 }
946
947 fd = dev_open(ent->d_name, O_RDONLY);
948 if (fd < 0)
949 printf(" Port%d : - disk info unavailable -\n", port);
950 else {
951 fd2devname(fd, buf);
952 printf(" Port%d : %s", port, buf);
953 if (imsm_read_serial(fd, NULL, (__u8 *) buf) == 0)
954 printf(" (%s)\n", buf);
955 else
956 printf("()\n");
957 }
958 close(fd);
959 free(path);
960 path = NULL;
961 }
962 if (path)
963 free(path);
964 if (dir)
965 closedir(dir);
966 if (err == 0) {
967 int i;
968
969 for (i = 0; i < port_count; i++)
970 if (port_mask & (1 << i))
971 printf(" Port%d : - no device attached -\n", i);
972 }
973
974 return err;
975 }
976
977 static int detail_platform_imsm(int verbose, int enumerate_only)
978 {
979 /* There are two components to imsm platform support, the ahci SATA
980 * controller and the option-rom. To find the SATA controller we
981 * simply look in /sys/bus/pci/drivers/ahci to see if an ahci
982 * controller with the Intel vendor id is present. This approach
983 * allows mdadm to leverage the kernel's ahci detection logic, with the
984 * caveat that if ahci.ko is not loaded mdadm will not be able to
985 * detect platform raid capabilities. The option-rom resides in a
986 * platform "Adapter ROM". We scan for its signature to retrieve the
987 * platform capabilities. If raid support is disabled in the BIOS the
988 * option-rom capability structure will not be available.
989 */
990 const struct imsm_orom *orom;
991 struct sys_dev *list, *hba;
992 DIR *dir;
993 struct dirent *ent;
994 const char *hba_path;
995 int host_base = 0;
996 int port_count = 0;
997
998 if (enumerate_only) {
999 if (check_env("IMSM_NO_PLATFORM") || find_imsm_orom())
1000 return 0;
1001 return 2;
1002 }
1003
1004 list = find_driver_devices("pci", "ahci");
1005 for (hba = list; hba; hba = hba->next)
1006 if (devpath_to_vendor(hba->path) == 0x8086)
1007 break;
1008
1009 if (!hba) {
1010 if (verbose)
1011 fprintf(stderr, Name ": unable to find active ahci controller\n");
1012 free_sys_dev(&list);
1013 return 2;
1014 } else if (verbose)
1015 fprintf(stderr, Name ": found Intel SATA AHCI Controller\n");
1016 hba_path = hba->path;
1017 hba->path = NULL;
1018 free_sys_dev(&list);
1019
1020 orom = find_imsm_orom();
1021 if (!orom) {
1022 if (verbose)
1023 fprintf(stderr, Name ": imsm option-rom not found\n");
1024 return 2;
1025 }
1026
1027 printf(" Platform : Intel(R) Matrix Storage Manager\n");
1028 printf(" Version : %d.%d.%d.%d\n", orom->major_ver, orom->minor_ver,
1029 orom->hotfix_ver, orom->build);
1030 printf(" RAID Levels :%s%s%s%s%s\n",
1031 imsm_orom_has_raid0(orom) ? " raid0" : "",
1032 imsm_orom_has_raid1(orom) ? " raid1" : "",
1033 imsm_orom_has_raid1e(orom) ? " raid1e" : "",
1034 imsm_orom_has_raid10(orom) ? " raid10" : "",
1035 imsm_orom_has_raid5(orom) ? " raid5" : "");
1036 printf(" Chunk Sizes :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
1037 imsm_orom_has_chunk(orom, 2) ? " 2k" : "",
1038 imsm_orom_has_chunk(orom, 4) ? " 4k" : "",
1039 imsm_orom_has_chunk(orom, 8) ? " 8k" : "",
1040 imsm_orom_has_chunk(orom, 16) ? " 16k" : "",
1041 imsm_orom_has_chunk(orom, 32) ? " 32k" : "",
1042 imsm_orom_has_chunk(orom, 64) ? " 64k" : "",
1043 imsm_orom_has_chunk(orom, 128) ? " 128k" : "",
1044 imsm_orom_has_chunk(orom, 256) ? " 256k" : "",
1045 imsm_orom_has_chunk(orom, 512) ? " 512k" : "",
1046 imsm_orom_has_chunk(orom, 1024*1) ? " 1M" : "",
1047 imsm_orom_has_chunk(orom, 1024*2) ? " 2M" : "",
1048 imsm_orom_has_chunk(orom, 1024*4) ? " 4M" : "",
1049 imsm_orom_has_chunk(orom, 1024*8) ? " 8M" : "",
1050 imsm_orom_has_chunk(orom, 1024*16) ? " 16M" : "",
1051 imsm_orom_has_chunk(orom, 1024*32) ? " 32M" : "",
1052 imsm_orom_has_chunk(orom, 1024*64) ? " 64M" : "");
1053 printf(" Max Disks : %d\n", orom->tds);
1054 printf(" Max Volumes : %d\n", orom->vpa);
1055 printf(" I/O Controller : %s\n", hba_path);
1056
1057 /* find the smallest scsi host number to determine a port number base */
1058 dir = opendir(hba_path);
1059 for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) {
1060 int host;
1061
1062 if (sscanf(ent->d_name, "host%d", &host) != 1)
1063 continue;
1064 if (port_count == 0)
1065 host_base = host;
1066 else if (host < host_base)
1067 host_base = host;
1068
1069 if (host + 1 > port_count + host_base)
1070 port_count = host + 1 - host_base;
1071
1072 }
1073 if (dir)
1074 closedir(dir);
1075
1076 if (!port_count || imsm_enumerate_ports(hba_path, port_count,
1077 host_base, verbose) != 0) {
1078 if (verbose)
1079 fprintf(stderr, Name ": failed to enumerate ports\n");
1080 return 2;
1081 }
1082
1083 return 0;
1084 }
1085 #endif
1086
1087 static int match_home_imsm(struct supertype *st, char *homehost)
1088 {
1089 /* the imsm metadata format does not specify any host
1090 * identification information. We return -1 since we can never
1091 * confirm nor deny whether a given array is "meant" for this
1092 * host. We rely on compare_super and the 'family_num' field to
1093 * exclude member disks that do not belong, and we rely on
1094 * mdadm.conf to specify the arrays that should be assembled.
1095 * Auto-assembly may still pick up "foreign" arrays.
1096 */
1097
1098 return -1;
1099 }
1100
1101 static void uuid_from_super_imsm(struct supertype *st, int uuid[4])
1102 {
1103 /* The uuid returned here is used for:
1104 * uuid to put into bitmap file (Create, Grow)
1105 * uuid for backup header when saving critical section (Grow)
1106 * comparing uuids when re-adding a device into an array
1107 * In these cases the uuid required is that of the data-array,
1108 * not the device-set.
1109 * uuid to recognise same set when adding a missing device back
1110 * to an array. This is a uuid for the device-set.
1111 *
1112 * For each of these we can make do with a truncated
1113 * or hashed uuid rather than the original, as long as
1114 * everyone agrees.
1115 * In each case the uuid required is that of the data-array,
1116 * not the device-set.
1117 */
1118 /* imsm does not track uuid's so we synthesis one using sha1 on
1119 * - The signature (Which is constant for all imsm array, but no matter)
1120 * - the family_num of the container
1121 * - the index number of the volume
1122 * - the 'serial' number of the volume.
1123 * Hopefully these are all constant.
1124 */
1125 struct intel_super *super = st->sb;
1126
1127 char buf[20];
1128 struct sha1_ctx ctx;
1129 struct imsm_dev *dev = NULL;
1130
1131 sha1_init_ctx(&ctx);
1132 sha1_process_bytes(super->anchor->sig, MPB_SIG_LEN, &ctx);
1133 sha1_process_bytes(&super->anchor->family_num, sizeof(__u32), &ctx);
1134 if (super->current_vol >= 0)
1135 dev = get_imsm_dev(super, super->current_vol);
1136 if (dev) {
1137 __u32 vol = super->current_vol;
1138 sha1_process_bytes(&vol, sizeof(vol), &ctx);
1139 sha1_process_bytes(dev->volume, MAX_RAID_SERIAL_LEN, &ctx);
1140 }
1141 sha1_finish_ctx(&ctx, buf);
1142 memcpy(uuid, buf, 4*4);
1143 }
1144
1145 #if 0
1146 static void
1147 get_imsm_numerical_version(struct imsm_super *mpb, int *m, int *p)
1148 {
1149 __u8 *v = get_imsm_version(mpb);
1150 __u8 *end = mpb->sig + MAX_SIGNATURE_LENGTH;
1151 char major[] = { 0, 0, 0 };
1152 char minor[] = { 0 ,0, 0 };
1153 char patch[] = { 0, 0, 0 };
1154 char *ver_parse[] = { major, minor, patch };
1155 int i, j;
1156
1157 i = j = 0;
1158 while (*v != '\0' && v < end) {
1159 if (*v != '.' && j < 2)
1160 ver_parse[i][j++] = *v;
1161 else {
1162 i++;
1163 j = 0;
1164 }
1165 v++;
1166 }
1167
1168 *m = strtol(minor, NULL, 0);
1169 *p = strtol(patch, NULL, 0);
1170 }
1171 #endif
1172
1173 static int imsm_level_to_layout(int level)
1174 {
1175 switch (level) {
1176 case 0:
1177 case 1:
1178 return 0;
1179 case 5:
1180 case 6:
1181 return ALGORITHM_LEFT_ASYMMETRIC;
1182 case 10:
1183 return 0x102;
1184 }
1185 return UnSet;
1186 }
1187
1188 static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info)
1189 {
1190 struct intel_super *super = st->sb;
1191 struct imsm_dev *dev = get_imsm_dev(super, super->current_vol);
1192 struct imsm_map *map = get_imsm_map(dev, 0);
1193 struct dl *dl;
1194
1195 for (dl = super->disks; dl; dl = dl->next)
1196 if (dl->raiddisk == info->disk.raid_disk)
1197 break;
1198 info->container_member = super->current_vol;
1199 info->array.raid_disks = map->num_members;
1200 info->array.level = get_imsm_raid_level(map);
1201 info->array.layout = imsm_level_to_layout(info->array.level);
1202 info->array.md_minor = -1;
1203 info->array.ctime = 0;
1204 info->array.utime = 0;
1205 info->array.chunk_size = __le16_to_cpu(map->blocks_per_strip) << 9;
1206 info->array.state = !dev->vol.dirty;
1207 info->custom_array_size = __le32_to_cpu(dev->size_high);
1208 info->custom_array_size <<= 32;
1209 info->custom_array_size |= __le32_to_cpu(dev->size_low);
1210
1211 info->disk.major = 0;
1212 info->disk.minor = 0;
1213 if (dl) {
1214 info->disk.major = dl->major;
1215 info->disk.minor = dl->minor;
1216 }
1217
1218 info->data_offset = __le32_to_cpu(map->pba_of_lba0);
1219 info->component_size = __le32_to_cpu(map->blocks_per_member);
1220 memset(info->uuid, 0, sizeof(info->uuid));
1221
1222 if (map->map_state == IMSM_T_STATE_UNINITIALIZED || dev->vol.dirty)
1223 info->resync_start = 0;
1224 else if (dev->vol.migr_state)
1225 /* FIXME add curr_migr_unit to resync_start conversion */
1226 info->resync_start = 0;
1227 else
1228 info->resync_start = ~0ULL;
1229
1230 strncpy(info->name, (char *) dev->volume, MAX_RAID_SERIAL_LEN);
1231 info->name[MAX_RAID_SERIAL_LEN] = 0;
1232
1233 info->array.major_version = -1;
1234 info->array.minor_version = -2;
1235 sprintf(info->text_version, "/%s/%d",
1236 devnum2devname(st->container_dev),
1237 info->container_member);
1238 info->safe_mode_delay = 4000; /* 4 secs like the Matrix driver */
1239 uuid_from_super_imsm(st, info->uuid);
1240 }
1241
1242 /* check the config file to see if we can return a real uuid for this spare */
1243 static void fixup_container_spare_uuid(struct mdinfo *inf)
1244 {
1245 struct mddev_ident_s *array_list;
1246
1247 if (inf->array.level != LEVEL_CONTAINER ||
1248 memcmp(inf->uuid, uuid_match_any, sizeof(int[4])) != 0)
1249 return;
1250
1251 array_list = conf_get_ident(NULL);
1252
1253 for (; array_list; array_list = array_list->next) {
1254 if (array_list->uuid_set) {
1255 struct supertype *_sst; /* spare supertype */
1256 struct supertype *_cst; /* container supertype */
1257
1258 _cst = array_list->st;
1259 _sst = _cst->ss->match_metadata_desc(inf->text_version);
1260 if (_sst) {
1261 memcpy(inf->uuid, array_list->uuid, sizeof(int[4]));
1262 free(_sst);
1263 break;
1264 }
1265 }
1266 }
1267 }
1268
1269 static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info)
1270 {
1271 struct intel_super *super = st->sb;
1272 struct imsm_disk *disk;
1273 __u32 s;
1274
1275 if (super->current_vol >= 0) {
1276 getinfo_super_imsm_volume(st, info);
1277 return;
1278 }
1279
1280 /* Set raid_disks to zero so that Assemble will always pull in valid
1281 * spares
1282 */
1283 info->array.raid_disks = 0;
1284 info->array.level = LEVEL_CONTAINER;
1285 info->array.layout = 0;
1286 info->array.md_minor = -1;
1287 info->array.ctime = 0; /* N/A for imsm */
1288 info->array.utime = 0;
1289 info->array.chunk_size = 0;
1290
1291 info->disk.major = 0;
1292 info->disk.minor = 0;
1293 info->disk.raid_disk = -1;
1294 info->reshape_active = 0;
1295 info->array.major_version = -1;
1296 info->array.minor_version = -2;
1297 strcpy(info->text_version, "imsm");
1298 info->safe_mode_delay = 0;
1299 info->disk.number = -1;
1300 info->disk.state = 0;
1301 info->name[0] = 0;
1302
1303 if (super->disks) {
1304 __u32 reserved = imsm_reserved_sectors(super, super->disks);
1305
1306 disk = &super->disks->disk;
1307 info->data_offset = __le32_to_cpu(disk->total_blocks) - reserved;
1308 info->component_size = reserved;
1309 s = disk->status;
1310 info->disk.state = s & CONFIGURED_DISK ? (1 << MD_DISK_ACTIVE) : 0;
1311 /* we don't change info->disk.raid_disk here because
1312 * this state will be finalized in mdmon after we have
1313 * found the 'most fresh' version of the metadata
1314 */
1315 info->disk.state |= s & FAILED_DISK ? (1 << MD_DISK_FAULTY) : 0;
1316 info->disk.state |= s & SPARE_DISK ? 0 : (1 << MD_DISK_SYNC);
1317 }
1318
1319 /* only call uuid_from_super_imsm when this disk is part of a populated container,
1320 * ->compare_super may have updated the 'num_raid_devs' field for spares
1321 */
1322 if (info->disk.state & (1 << MD_DISK_SYNC) || super->anchor->num_raid_devs)
1323 uuid_from_super_imsm(st, info->uuid);
1324 else {
1325 memcpy(info->uuid, uuid_match_any, sizeof(int[4]));
1326 fixup_container_spare_uuid(info);
1327 }
1328 }
1329
1330 static int update_super_imsm(struct supertype *st, struct mdinfo *info,
1331 char *update, char *devname, int verbose,
1332 int uuid_set, char *homehost)
1333 {
1334 /* FIXME */
1335
1336 /* For 'assemble' and 'force' we need to return non-zero if any
1337 * change was made. For others, the return value is ignored.
1338 * Update options are:
1339 * force-one : This device looks a bit old but needs to be included,
1340 * update age info appropriately.
1341 * assemble: clear any 'faulty' flag to allow this device to
1342 * be assembled.
1343 * force-array: Array is degraded but being forced, mark it clean
1344 * if that will be needed to assemble it.
1345 *
1346 * newdev: not used ????
1347 * grow: Array has gained a new device - this is currently for
1348 * linear only
1349 * resync: mark as dirty so a resync will happen.
1350 * name: update the name - preserving the homehost
1351 *
1352 * Following are not relevant for this imsm:
1353 * sparc2.2 : update from old dodgey metadata
1354 * super-minor: change the preferred_minor number
1355 * summaries: update redundant counters.
1356 * uuid: Change the uuid of the array to match watch is given
1357 * homehost: update the recorded homehost
1358 * _reshape_progress: record new reshape_progress position.
1359 */
1360 int rv = 0;
1361 //struct intel_super *super = st->sb;
1362 //struct imsm_super *mpb = super->mpb;
1363
1364 if (strcmp(update, "grow") == 0) {
1365 }
1366 if (strcmp(update, "resync") == 0) {
1367 /* dev->vol.dirty = 1; */
1368 }
1369
1370 /* IMSM has no concept of UUID or homehost */
1371
1372 return rv;
1373 }
1374
1375 static size_t disks_to_mpb_size(int disks)
1376 {
1377 size_t size;
1378
1379 size = sizeof(struct imsm_super);
1380 size += (disks - 1) * sizeof(struct imsm_disk);
1381 size += 2 * sizeof(struct imsm_dev);
1382 /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */
1383 size += (4 - 2) * sizeof(struct imsm_map);
1384 /* 4 possible disk_ord_tbl's */
1385 size += 4 * (disks - 1) * sizeof(__u32);
1386
1387 return size;
1388 }
1389
1390 static __u64 avail_size_imsm(struct supertype *st, __u64 devsize)
1391 {
1392 if (devsize < (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS))
1393 return 0;
1394
1395 return devsize - (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS);
1396 }
1397
1398 static void free_devlist(struct intel_super *super)
1399 {
1400 struct intel_dev *dv;
1401
1402 while (super->devlist) {
1403 dv = super->devlist->next;
1404 free(super->devlist->dev);
1405 free(super->devlist);
1406 super->devlist = dv;
1407 }
1408 }
1409
1410 static void imsm_copy_dev(struct imsm_dev *dest, struct imsm_dev *src)
1411 {
1412 memcpy(dest, src, sizeof_imsm_dev(src, 0));
1413 }
1414
1415 static int compare_super_imsm(struct supertype *st, struct supertype *tst)
1416 {
1417 /*
1418 * return:
1419 * 0 same, or first was empty, and second was copied
1420 * 1 second had wrong number
1421 * 2 wrong uuid
1422 * 3 wrong other info
1423 */
1424 struct intel_super *first = st->sb;
1425 struct intel_super *sec = tst->sb;
1426
1427 if (!first) {
1428 st->sb = tst->sb;
1429 tst->sb = NULL;
1430 return 0;
1431 }
1432
1433 if (memcmp(first->anchor->sig, sec->anchor->sig, MAX_SIGNATURE_LENGTH) != 0)
1434 return 3;
1435
1436 /* if an anchor does not have num_raid_devs set then it is a free
1437 * floating spare
1438 */
1439 if (first->anchor->num_raid_devs > 0 &&
1440 sec->anchor->num_raid_devs > 0) {
1441 if (first->anchor->family_num != sec->anchor->family_num)
1442 return 3;
1443 }
1444
1445 /* if 'first' is a spare promote it to a populated mpb with sec's
1446 * family number
1447 */
1448 if (first->anchor->num_raid_devs == 0 &&
1449 sec->anchor->num_raid_devs > 0) {
1450 int i;
1451 struct intel_dev *dv;
1452 struct imsm_dev *dev;
1453
1454 /* we need to copy raid device info from sec if an allocation
1455 * fails here we don't associate the spare
1456 */
1457 for (i = 0; i < sec->anchor->num_raid_devs; i++) {
1458 dv = malloc(sizeof(*dv));
1459 if (!dv)
1460 break;
1461 dev = malloc(sizeof_imsm_dev(get_imsm_dev(sec, i), 1));
1462 if (!dev) {
1463 free(dv);
1464 break;
1465 }
1466 dv->dev = dev;
1467 dv->index = i;
1468 dv->next = first->devlist;
1469 first->devlist = dv;
1470 }
1471 if (i <= sec->anchor->num_raid_devs) {
1472 /* allocation failure */
1473 free_devlist(first);
1474 fprintf(stderr, "imsm: failed to associate spare\n");
1475 return 3;
1476 }
1477 for (i = 0; i < sec->anchor->num_raid_devs; i++)
1478 imsm_copy_dev(get_imsm_dev(first, i), get_imsm_dev(sec, i));
1479
1480 first->anchor->num_raid_devs = sec->anchor->num_raid_devs;
1481 first->anchor->family_num = sec->anchor->family_num;
1482 }
1483
1484 return 0;
1485 }
1486
1487 static void fd2devname(int fd, char *name)
1488 {
1489 struct stat st;
1490 char path[256];
1491 char dname[100];
1492 char *nm;
1493 int rv;
1494
1495 name[0] = '\0';
1496 if (fstat(fd, &st) != 0)
1497 return;
1498 sprintf(path, "/sys/dev/block/%d:%d",
1499 major(st.st_rdev), minor(st.st_rdev));
1500
1501 rv = readlink(path, dname, sizeof(dname));
1502 if (rv <= 0)
1503 return;
1504
1505 dname[rv] = '\0';
1506 nm = strrchr(dname, '/');
1507 nm++;
1508 snprintf(name, MAX_RAID_SERIAL_LEN, "/dev/%s", nm);
1509 }
1510
1511
1512 extern int scsi_get_serial(int fd, void *buf, size_t buf_len);
1513
1514 static int imsm_read_serial(int fd, char *devname,
1515 __u8 serial[MAX_RAID_SERIAL_LEN])
1516 {
1517 unsigned char scsi_serial[255];
1518 int rv;
1519 int rsp_len;
1520 int len;
1521 char *dest;
1522 char *src;
1523 char *rsp_buf;
1524 int i;
1525
1526 memset(scsi_serial, 0, sizeof(scsi_serial));
1527
1528 rv = scsi_get_serial(fd, scsi_serial, sizeof(scsi_serial));
1529
1530 if (rv && check_env("IMSM_DEVNAME_AS_SERIAL")) {
1531 memset(serial, 0, MAX_RAID_SERIAL_LEN);
1532 fd2devname(fd, (char *) serial);
1533 return 0;
1534 }
1535
1536 if (rv != 0) {
1537 if (devname)
1538 fprintf(stderr,
1539 Name ": Failed to retrieve serial for %s\n",
1540 devname);
1541 return rv;
1542 }
1543
1544 rsp_len = scsi_serial[3];
1545 if (!rsp_len) {
1546 if (devname)
1547 fprintf(stderr,
1548 Name ": Failed to retrieve serial for %s\n",
1549 devname);
1550 return 2;
1551 }
1552 rsp_buf = (char *) &scsi_serial[4];
1553
1554 /* trim all whitespace and non-printable characters and convert
1555 * ':' to ';'
1556 */
1557 for (i = 0, dest = rsp_buf; i < rsp_len; i++) {
1558 src = &rsp_buf[i];
1559 if (*src > 0x20) {
1560 /* ':' is reserved for use in placeholder serial
1561 * numbers for missing disks
1562 */
1563 if (*src == ':')
1564 *dest++ = ';';
1565 else
1566 *dest++ = *src;
1567 }
1568 }
1569 len = dest - rsp_buf;
1570 dest = rsp_buf;
1571
1572 /* truncate leading characters */
1573 if (len > MAX_RAID_SERIAL_LEN) {
1574 dest += len - MAX_RAID_SERIAL_LEN;
1575 len = MAX_RAID_SERIAL_LEN;
1576 }
1577
1578 memset(serial, 0, MAX_RAID_SERIAL_LEN);
1579 memcpy(serial, dest, len);
1580
1581 return 0;
1582 }
1583
1584 static int serialcmp(__u8 *s1, __u8 *s2)
1585 {
1586 return strncmp((char *) s1, (char *) s2, MAX_RAID_SERIAL_LEN);
1587 }
1588
1589 static void serialcpy(__u8 *dest, __u8 *src)
1590 {
1591 strncpy((char *) dest, (char *) src, MAX_RAID_SERIAL_LEN);
1592 }
1593
1594 static struct dl *serial_to_dl(__u8 *serial, struct intel_super *super)
1595 {
1596 struct dl *dl;
1597
1598 for (dl = super->disks; dl; dl = dl->next)
1599 if (serialcmp(dl->serial, serial) == 0)
1600 break;
1601
1602 return dl;
1603 }
1604
1605 static int
1606 load_imsm_disk(int fd, struct intel_super *super, char *devname, int keep_fd)
1607 {
1608 struct dl *dl;
1609 struct stat stb;
1610 int rv;
1611 int i;
1612 int alloc = 1;
1613 __u8 serial[MAX_RAID_SERIAL_LEN];
1614
1615 rv = imsm_read_serial(fd, devname, serial);
1616
1617 if (rv != 0)
1618 return 2;
1619
1620 /* check if this is a disk we have seen before. it may be a spare in
1621 * super->disks while the current anchor believes it is a raid member,
1622 * check if we need to update dl->index
1623 */
1624 dl = serial_to_dl(serial, super);
1625 if (!dl)
1626 dl = malloc(sizeof(*dl));
1627 else
1628 alloc = 0;
1629
1630 if (!dl) {
1631 if (devname)
1632 fprintf(stderr,
1633 Name ": failed to allocate disk buffer for %s\n",
1634 devname);
1635 return 2;
1636 }
1637
1638 if (alloc) {
1639 fstat(fd, &stb);
1640 dl->major = major(stb.st_rdev);
1641 dl->minor = minor(stb.st_rdev);
1642 dl->next = super->disks;
1643 dl->fd = keep_fd ? fd : -1;
1644 dl->devname = devname ? strdup(devname) : NULL;
1645 serialcpy(dl->serial, serial);
1646 dl->index = -2;
1647 dl->e = NULL;
1648 } else if (keep_fd) {
1649 close(dl->fd);
1650 dl->fd = fd;
1651 }
1652
1653 /* look up this disk's index in the current anchor */
1654 for (i = 0; i < super->anchor->num_disks; i++) {
1655 struct imsm_disk *disk_iter;
1656
1657 disk_iter = __get_imsm_disk(super->anchor, i);
1658
1659 if (serialcmp(disk_iter->serial, dl->serial) == 0) {
1660 dl->disk = *disk_iter;
1661 /* only set index on disks that are a member of a
1662 * populated contianer, i.e. one with raid_devs
1663 */
1664 if (dl->disk.status & FAILED_DISK)
1665 dl->index = -2;
1666 else if (dl->disk.status & SPARE_DISK)
1667 dl->index = -1;
1668 else
1669 dl->index = i;
1670
1671 break;
1672 }
1673 }
1674
1675 /* no match, maybe a stale failed drive */
1676 if (i == super->anchor->num_disks && dl->index >= 0) {
1677 dl->disk = *__get_imsm_disk(super->anchor, dl->index);
1678 if (dl->disk.status & FAILED_DISK)
1679 dl->index = -2;
1680 }
1681
1682 if (alloc)
1683 super->disks = dl;
1684
1685 return 0;
1686 }
1687
1688 #ifndef MDASSEMBLE
1689 /* When migrating map0 contains the 'destination' state while map1
1690 * contains the current state. When not migrating map0 contains the
1691 * current state. This routine assumes that map[0].map_state is set to
1692 * the current array state before being called.
1693 *
1694 * Migration is indicated by one of the following states
1695 * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed)
1696 * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal
1697 * map1state=unitialized)
1698 * 3/ Repair (Resync) (migr_state=1 migr_type=MIGR_REPAIR map0state=normal
1699 * map1state=normal)
1700 * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal
1701 * map1state=degraded)
1702 */
1703 static void migrate(struct imsm_dev *dev, __u8 to_state, int migr_type)
1704 {
1705 struct imsm_map *dest;
1706 struct imsm_map *src = get_imsm_map(dev, 0);
1707
1708 dev->vol.migr_state = 1;
1709 set_migr_type(dev, migr_type);
1710 dev->vol.curr_migr_unit = 0;
1711 dest = get_imsm_map(dev, 1);
1712
1713 /* duplicate and then set the target end state in map[0] */
1714 memcpy(dest, src, sizeof_imsm_map(src));
1715 if (migr_type == MIGR_REBUILD) {
1716 __u32 ord;
1717 int i;
1718
1719 for (i = 0; i < src->num_members; i++) {
1720 ord = __le32_to_cpu(src->disk_ord_tbl[i]);
1721 set_imsm_ord_tbl_ent(src, i, ord_to_idx(ord));
1722 }
1723 }
1724
1725 src->map_state = to_state;
1726 }
1727
1728 static void end_migration(struct imsm_dev *dev, __u8 map_state)
1729 {
1730 struct imsm_map *map = get_imsm_map(dev, 0);
1731 struct imsm_map *prev = get_imsm_map(dev, dev->vol.migr_state);
1732 int i;
1733
1734 /* merge any IMSM_ORD_REBUILD bits that were not successfully
1735 * completed in the last migration.
1736 *
1737 * FIXME add support for online capacity expansion and
1738 * raid-level-migration
1739 */
1740 for (i = 0; i < prev->num_members; i++)
1741 map->disk_ord_tbl[i] |= prev->disk_ord_tbl[i];
1742
1743 dev->vol.migr_state = 0;
1744 dev->vol.curr_migr_unit = 0;
1745 map->map_state = map_state;
1746 }
1747 #endif
1748
1749 static int parse_raid_devices(struct intel_super *super)
1750 {
1751 int i;
1752 struct imsm_dev *dev_new;
1753 size_t len, len_migr;
1754 size_t space_needed = 0;
1755 struct imsm_super *mpb = super->anchor;
1756
1757 for (i = 0; i < super->anchor->num_raid_devs; i++) {
1758 struct imsm_dev *dev_iter = __get_imsm_dev(super->anchor, i);
1759 struct intel_dev *dv;
1760
1761 len = sizeof_imsm_dev(dev_iter, 0);
1762 len_migr = sizeof_imsm_dev(dev_iter, 1);
1763 if (len_migr > len)
1764 space_needed += len_migr - len;
1765
1766 dv = malloc(sizeof(*dv));
1767 if (!dv)
1768 return 1;
1769 dev_new = malloc(len_migr);
1770 if (!dev_new) {
1771 free(dv);
1772 return 1;
1773 }
1774 imsm_copy_dev(dev_new, dev_iter);
1775 dv->dev = dev_new;
1776 dv->index = i;
1777 dv->next = super->devlist;
1778 super->devlist = dv;
1779 }
1780
1781 /* ensure that super->buf is large enough when all raid devices
1782 * are migrating
1783 */
1784 if (__le32_to_cpu(mpb->mpb_size) + space_needed > super->len) {
1785 void *buf;
1786
1787 len = ROUND_UP(__le32_to_cpu(mpb->mpb_size) + space_needed, 512);
1788 if (posix_memalign(&buf, 512, len) != 0)
1789 return 1;
1790
1791 memcpy(buf, super->buf, super->len);
1792 memset(buf + super->len, 0, len - super->len);
1793 free(super->buf);
1794 super->buf = buf;
1795 super->len = len;
1796 }
1797
1798 return 0;
1799 }
1800
1801 /* retrieve a pointer to the bbm log which starts after all raid devices */
1802 struct bbm_log *__get_imsm_bbm_log(struct imsm_super *mpb)
1803 {
1804 void *ptr = NULL;
1805
1806 if (__le32_to_cpu(mpb->bbm_log_size)) {
1807 ptr = mpb;
1808 ptr += mpb->mpb_size - __le32_to_cpu(mpb->bbm_log_size);
1809 }
1810
1811 return ptr;
1812 }
1813
1814 static void __free_imsm(struct intel_super *super, int free_disks);
1815
1816 /* load_imsm_mpb - read matrix metadata
1817 * allocates super->mpb to be freed by free_super
1818 */
1819 static int load_imsm_mpb(int fd, struct intel_super *super, char *devname)
1820 {
1821 unsigned long long dsize;
1822 unsigned long long sectors;
1823 struct stat;
1824 struct imsm_super *anchor;
1825 __u32 check_sum;
1826 int rc;
1827
1828 get_dev_size(fd, NULL, &dsize);
1829
1830 if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) {
1831 if (devname)
1832 fprintf(stderr,
1833 Name ": Cannot seek to anchor block on %s: %s\n",
1834 devname, strerror(errno));
1835 return 1;
1836 }
1837
1838 if (posix_memalign((void**)&anchor, 512, 512) != 0) {
1839 if (devname)
1840 fprintf(stderr,
1841 Name ": Failed to allocate imsm anchor buffer"
1842 " on %s\n", devname);
1843 return 1;
1844 }
1845 if (read(fd, anchor, 512) != 512) {
1846 if (devname)
1847 fprintf(stderr,
1848 Name ": Cannot read anchor block on %s: %s\n",
1849 devname, strerror(errno));
1850 free(anchor);
1851 return 1;
1852 }
1853
1854 if (strncmp((char *) anchor->sig, MPB_SIGNATURE, MPB_SIG_LEN) != 0) {
1855 if (devname)
1856 fprintf(stderr,
1857 Name ": no IMSM anchor on %s\n", devname);
1858 free(anchor);
1859 return 2;
1860 }
1861
1862 __free_imsm(super, 0);
1863 super->len = ROUND_UP(anchor->mpb_size, 512);
1864 if (posix_memalign(&super->buf, 512, super->len) != 0) {
1865 if (devname)
1866 fprintf(stderr,
1867 Name ": unable to allocate %zu byte mpb buffer\n",
1868 super->len);
1869 free(anchor);
1870 return 2;
1871 }
1872 memcpy(super->buf, anchor, 512);
1873
1874 sectors = mpb_sectors(anchor) - 1;
1875 free(anchor);
1876 if (!sectors) {
1877 check_sum = __gen_imsm_checksum(super->anchor);
1878 if (check_sum != __le32_to_cpu(super->anchor->check_sum)) {
1879 if (devname)
1880 fprintf(stderr,
1881 Name ": IMSM checksum %x != %x on %s\n",
1882 check_sum,
1883 __le32_to_cpu(super->anchor->check_sum),
1884 devname);
1885 return 2;
1886 }
1887
1888 rc = load_imsm_disk(fd, super, devname, 0);
1889 if (rc == 0)
1890 rc = parse_raid_devices(super);
1891 return rc;
1892 }
1893
1894 /* read the extended mpb */
1895 if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0) {
1896 if (devname)
1897 fprintf(stderr,
1898 Name ": Cannot seek to extended mpb on %s: %s\n",
1899 devname, strerror(errno));
1900 return 1;
1901 }
1902
1903 if (read(fd, super->buf + 512, super->len - 512) != super->len - 512) {
1904 if (devname)
1905 fprintf(stderr,
1906 Name ": Cannot read extended mpb on %s: %s\n",
1907 devname, strerror(errno));
1908 return 2;
1909 }
1910
1911 check_sum = __gen_imsm_checksum(super->anchor);
1912 if (check_sum != __le32_to_cpu(super->anchor->check_sum)) {
1913 if (devname)
1914 fprintf(stderr,
1915 Name ": IMSM checksum %x != %x on %s\n",
1916 check_sum, __le32_to_cpu(super->anchor->check_sum),
1917 devname);
1918 return 3;
1919 }
1920
1921 /* FIXME the BBM log is disk specific so we cannot use this global
1922 * buffer for all disks. Ok for now since we only look at the global
1923 * bbm_log_size parameter to gate assembly
1924 */
1925 super->bbm_log = __get_imsm_bbm_log(super->anchor);
1926
1927 rc = load_imsm_disk(fd, super, devname, 0);
1928 if (rc == 0)
1929 rc = parse_raid_devices(super);
1930
1931 return rc;
1932 }
1933
1934 static void __free_imsm_disk(struct dl *d)
1935 {
1936 if (d->fd >= 0)
1937 close(d->fd);
1938 if (d->devname)
1939 free(d->devname);
1940 if (d->e)
1941 free(d->e);
1942 free(d);
1943
1944 }
1945 static void free_imsm_disks(struct intel_super *super)
1946 {
1947 struct dl *d;
1948
1949 while (super->disks) {
1950 d = super->disks;
1951 super->disks = d->next;
1952 __free_imsm_disk(d);
1953 }
1954 while (super->missing) {
1955 d = super->missing;
1956 super->missing = d->next;
1957 __free_imsm_disk(d);
1958 }
1959
1960 }
1961
1962 /* free all the pieces hanging off of a super pointer */
1963 static void __free_imsm(struct intel_super *super, int free_disks)
1964 {
1965 if (super->buf) {
1966 free(super->buf);
1967 super->buf = NULL;
1968 }
1969 if (free_disks)
1970 free_imsm_disks(super);
1971 free_devlist(super);
1972 if (super->hba) {
1973 free((void *) super->hba);
1974 super->hba = NULL;
1975 }
1976 }
1977
1978 static void free_imsm(struct intel_super *super)
1979 {
1980 __free_imsm(super, 1);
1981 free(super);
1982 }
1983
1984 static void free_super_imsm(struct supertype *st)
1985 {
1986 struct intel_super *super = st->sb;
1987
1988 if (!super)
1989 return;
1990
1991 free_imsm(super);
1992 st->sb = NULL;
1993 }
1994
1995 static struct intel_super *alloc_super(int creating_imsm)
1996 {
1997 struct intel_super *super = malloc(sizeof(*super));
1998
1999 if (super) {
2000 memset(super, 0, sizeof(*super));
2001 super->creating_imsm = creating_imsm;
2002 super->current_vol = -1;
2003 super->create_offset = ~((__u32 ) 0);
2004 if (!check_env("IMSM_NO_PLATFORM"))
2005 super->orom = find_imsm_orom();
2006 if (super->orom && !check_env("IMSM_TEST_OROM")) {
2007 struct sys_dev *list, *ent;
2008
2009 /* find the first intel ahci controller */
2010 list = find_driver_devices("pci", "ahci");
2011 for (ent = list; ent; ent = ent->next)
2012 if (devpath_to_vendor(ent->path) == 0x8086)
2013 break;
2014 if (ent) {
2015 super->hba = ent->path;
2016 ent->path = NULL;
2017 }
2018 free_sys_dev(&list);
2019 }
2020 }
2021
2022 return super;
2023 }
2024
2025 #ifndef MDASSEMBLE
2026 /* find_missing - helper routine for load_super_imsm_all that identifies
2027 * disks that have disappeared from the system. This routine relies on
2028 * the mpb being uptodate, which it is at load time.
2029 */
2030 static int find_missing(struct intel_super *super)
2031 {
2032 int i;
2033 struct imsm_super *mpb = super->anchor;
2034 struct dl *dl;
2035 struct imsm_disk *disk;
2036
2037 for (i = 0; i < mpb->num_disks; i++) {
2038 disk = __get_imsm_disk(mpb, i);
2039 dl = serial_to_dl(disk->serial, super);
2040 if (dl)
2041 continue;
2042
2043 dl = malloc(sizeof(*dl));
2044 if (!dl)
2045 return 1;
2046 dl->major = 0;
2047 dl->minor = 0;
2048 dl->fd = -1;
2049 dl->devname = strdup("missing");
2050 dl->index = i;
2051 serialcpy(dl->serial, disk->serial);
2052 dl->disk = *disk;
2053 dl->e = NULL;
2054 dl->next = super->missing;
2055 super->missing = dl;
2056 }
2057
2058 return 0;
2059 }
2060
2061 static int load_super_imsm_all(struct supertype *st, int fd, void **sbp,
2062 char *devname, int keep_fd)
2063 {
2064 struct mdinfo *sra;
2065 struct intel_super *super;
2066 struct mdinfo *sd, *best = NULL;
2067 __u32 bestgen = 0;
2068 __u32 gen;
2069 char nm[20];
2070 int dfd;
2071 int rv;
2072 int devnum = fd2devnum(fd);
2073 int retry;
2074 enum sysfs_read_flags flags;
2075
2076 flags = GET_LEVEL|GET_VERSION|GET_DEVS|GET_STATE;
2077 if (mdmon_running(devnum))
2078 flags |= SKIP_GONE_DEVS;
2079
2080 /* check if 'fd' an opened container */
2081 sra = sysfs_read(fd, 0, flags);
2082 if (!sra)
2083 return 1;
2084
2085 if (sra->array.major_version != -1 ||
2086 sra->array.minor_version != -2 ||
2087 strcmp(sra->text_version, "imsm") != 0)
2088 return 1;
2089
2090 super = alloc_super(0);
2091 if (!super)
2092 return 1;
2093
2094 /* find the most up to date disk in this array, skipping spares */
2095 for (sd = sra->devs; sd; sd = sd->next) {
2096 sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
2097 dfd = dev_open(nm, keep_fd ? O_RDWR : O_RDONLY);
2098 if (dfd < 0) {
2099 free_imsm(super);
2100 return 2;
2101 }
2102 rv = load_imsm_mpb(dfd, super, NULL);
2103
2104 /* retry the load if we might have raced against mdmon */
2105 if (rv == 3 && mdmon_running(devnum))
2106 for (retry = 0; retry < 3; retry++) {
2107 usleep(3000);
2108 rv = load_imsm_mpb(dfd, super, NULL);
2109 if (rv != 3)
2110 break;
2111 }
2112 if (!keep_fd)
2113 close(dfd);
2114 if (rv == 0) {
2115 if (super->anchor->num_raid_devs == 0)
2116 gen = 0;
2117 else
2118 gen = __le32_to_cpu(super->anchor->generation_num);
2119 if (!best || gen > bestgen) {
2120 bestgen = gen;
2121 best = sd;
2122 }
2123 } else {
2124 free_imsm(super);
2125 return rv;
2126 }
2127 }
2128
2129 if (!best) {
2130 free_imsm(super);
2131 return 1;
2132 }
2133
2134 /* load the most up to date anchor */
2135 sprintf(nm, "%d:%d", best->disk.major, best->disk.minor);
2136 dfd = dev_open(nm, O_RDONLY);
2137 if (dfd < 0) {
2138 free_imsm(super);
2139 return 1;
2140 }
2141 rv = load_imsm_mpb(dfd, super, NULL);
2142 close(dfd);
2143 if (rv != 0) {
2144 free_imsm(super);
2145 return 2;
2146 }
2147
2148 /* re-parse the disk list with the current anchor */
2149 for (sd = sra->devs ; sd ; sd = sd->next) {
2150 sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor);
2151 dfd = dev_open(nm, keep_fd? O_RDWR : O_RDONLY);
2152 if (dfd < 0) {
2153 free_imsm(super);
2154 return 2;
2155 }
2156 load_imsm_disk(dfd, super, NULL, keep_fd);
2157 if (!keep_fd)
2158 close(dfd);
2159 }
2160
2161
2162 if (find_missing(super) != 0) {
2163 free_imsm(super);
2164 return 2;
2165 }
2166
2167 if (st->subarray[0]) {
2168 if (atoi(st->subarray) <= super->anchor->num_raid_devs)
2169 super->current_vol = atoi(st->subarray);
2170 else {
2171 free_imsm(super);
2172 return 1;
2173 }
2174 }
2175
2176 *sbp = super;
2177 st->container_dev = devnum;
2178 if (st->ss == NULL) {
2179 st->ss = &super_imsm;
2180 st->minor_version = 0;
2181 st->max_devs = IMSM_MAX_DEVICES;
2182 }
2183 st->loaded_container = 1;
2184
2185 return 0;
2186 }
2187 #endif
2188
2189 static int load_super_imsm(struct supertype *st, int fd, char *devname)
2190 {
2191 struct intel_super *super;
2192 int rv;
2193
2194 #ifndef MDASSEMBLE
2195 if (load_super_imsm_all(st, fd, &st->sb, devname, 1) == 0)
2196 return 0;
2197 #endif
2198
2199 free_super_imsm(st);
2200
2201 super = alloc_super(0);
2202 if (!super) {
2203 fprintf(stderr,
2204 Name ": malloc of %zu failed.\n",
2205 sizeof(*super));
2206 return 1;
2207 }
2208
2209 rv = load_imsm_mpb(fd, super, devname);
2210
2211 if (rv) {
2212 if (devname)
2213 fprintf(stderr,
2214 Name ": Failed to load all information "
2215 "sections on %s\n", devname);
2216 free_imsm(super);
2217 return rv;
2218 }
2219
2220 if (st->subarray[0]) {
2221 if (atoi(st->subarray) <= super->anchor->num_raid_devs)
2222 super->current_vol = atoi(st->subarray);
2223 else {
2224 free_imsm(super);
2225 return 1;
2226 }
2227 }
2228
2229 st->sb = super;
2230 if (st->ss == NULL) {
2231 st->ss = &super_imsm;
2232 st->minor_version = 0;
2233 st->max_devs = IMSM_MAX_DEVICES;
2234 }
2235 st->loaded_container = 0;
2236
2237 return 0;
2238 }
2239
2240 static __u16 info_to_blocks_per_strip(mdu_array_info_t *info)
2241 {
2242 if (info->level == 1)
2243 return 128;
2244 return info->chunk_size >> 9;
2245 }
2246
2247 static __u32 info_to_num_data_stripes(mdu_array_info_t *info, int num_domains)
2248 {
2249 __u32 num_stripes;
2250
2251 num_stripes = (info->size * 2) / info_to_blocks_per_strip(info);
2252 num_stripes /= num_domains;
2253
2254 return num_stripes;
2255 }
2256
2257 static __u32 info_to_blocks_per_member(mdu_array_info_t *info)
2258 {
2259 if (info->level == 1)
2260 return info->size * 2;
2261 else
2262 return (info->size * 2) & ~(info_to_blocks_per_strip(info) - 1);
2263 }
2264
2265 static void imsm_update_version_info(struct intel_super *super)
2266 {
2267 /* update the version and attributes */
2268 struct imsm_super *mpb = super->anchor;
2269 char *version;
2270 struct imsm_dev *dev;
2271 struct imsm_map *map;
2272 int i;
2273
2274 for (i = 0; i < mpb->num_raid_devs; i++) {
2275 dev = get_imsm_dev(super, i);
2276 map = get_imsm_map(dev, 0);
2277 if (__le32_to_cpu(dev->size_high) > 0)
2278 mpb->attributes |= MPB_ATTRIB_2TB;
2279
2280 /* FIXME detect when an array spans a port multiplier */
2281 #if 0
2282 mpb->attributes |= MPB_ATTRIB_PM;
2283 #endif
2284
2285 if (mpb->num_raid_devs > 1 ||
2286 mpb->attributes != MPB_ATTRIB_CHECKSUM_VERIFY) {
2287 version = MPB_VERSION_ATTRIBS;
2288 switch (get_imsm_raid_level(map)) {
2289 case 0: mpb->attributes |= MPB_ATTRIB_RAID0; break;
2290 case 1: mpb->attributes |= MPB_ATTRIB_RAID1; break;
2291 case 10: mpb->attributes |= MPB_ATTRIB_RAID10; break;
2292 case 5: mpb->attributes |= MPB_ATTRIB_RAID5; break;
2293 }
2294 } else {
2295 if (map->num_members >= 5)
2296 version = MPB_VERSION_5OR6_DISK_ARRAY;
2297 else if (dev->status == DEV_CLONE_N_GO)
2298 version = MPB_VERSION_CNG;
2299 else if (get_imsm_raid_level(map) == 5)
2300 version = MPB_VERSION_RAID5;
2301 else if (map->num_members >= 3)
2302 version = MPB_VERSION_3OR4_DISK_ARRAY;
2303 else if (get_imsm_raid_level(map) == 1)
2304 version = MPB_VERSION_RAID1;
2305 else
2306 version = MPB_VERSION_RAID0;
2307 }
2308 strcpy(((char *) mpb->sig) + strlen(MPB_SIGNATURE), version);
2309 }
2310 }
2311
2312 static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info,
2313 unsigned long long size, char *name,
2314 char *homehost, int *uuid)
2315 {
2316 /* We are creating a volume inside a pre-existing container.
2317 * so st->sb is already set.
2318 */
2319 struct intel_super *super = st->sb;
2320 struct imsm_super *mpb = super->anchor;
2321 struct intel_dev *dv;
2322 struct imsm_dev *dev;
2323 struct imsm_vol *vol;
2324 struct imsm_map *map;
2325 int idx = mpb->num_raid_devs;
2326 int i;
2327 unsigned long long array_blocks;
2328 size_t size_old, size_new;
2329 __u32 num_data_stripes;
2330
2331 if (super->orom && mpb->num_raid_devs >= super->orom->vpa) {
2332 fprintf(stderr, Name": This imsm-container already has the "
2333 "maximum of %d volumes\n", super->orom->vpa);
2334 return 0;
2335 }
2336
2337 /* ensure the mpb is large enough for the new data */
2338 size_old = __le32_to_cpu(mpb->mpb_size);
2339 size_new = disks_to_mpb_size(info->nr_disks);
2340 if (size_new > size_old) {
2341 void *mpb_new;
2342 size_t size_round = ROUND_UP(size_new, 512);
2343
2344 if (posix_memalign(&mpb_new, 512, size_round) != 0) {
2345 fprintf(stderr, Name": could not allocate new mpb\n");
2346 return 0;
2347 }
2348 memcpy(mpb_new, mpb, size_old);
2349 free(mpb);
2350 mpb = mpb_new;
2351 super->anchor = mpb_new;
2352 mpb->mpb_size = __cpu_to_le32(size_new);
2353 memset(mpb_new + size_old, 0, size_round - size_old);
2354 }
2355 super->current_vol = idx;
2356 /* when creating the first raid device in this container set num_disks
2357 * to zero, i.e. delete this spare and add raid member devices in
2358 * add_to_super_imsm_volume()
2359 */
2360 if (super->current_vol == 0)
2361 mpb->num_disks = 0;
2362
2363 for (i = 0; i < super->current_vol; i++) {
2364 dev = get_imsm_dev(super, i);
2365 if (strncmp((char *) dev->volume, name,
2366 MAX_RAID_SERIAL_LEN) == 0) {
2367 fprintf(stderr, Name": '%s' is already defined for this container\n",
2368 name);
2369 return 0;
2370 }
2371 }
2372
2373 sprintf(st->subarray, "%d", idx);
2374 dv = malloc(sizeof(*dv));
2375 if (!dv) {
2376 fprintf(stderr, Name ": failed to allocate device list entry\n");
2377 return 0;
2378 }
2379 dev = malloc(sizeof(*dev) + sizeof(__u32) * (info->raid_disks - 1));
2380 if (!dev) {
2381 free(dv);
2382 fprintf(stderr, Name": could not allocate raid device\n");
2383 return 0;
2384 }
2385 strncpy((char *) dev->volume, name, MAX_RAID_SERIAL_LEN);
2386 if (info->level == 1)
2387 array_blocks = info_to_blocks_per_member(info);
2388 else
2389 array_blocks = calc_array_size(info->level, info->raid_disks,
2390 info->layout, info->chunk_size,
2391 info->size*2);
2392 /* round array size down to closest MB */
2393 array_blocks = (array_blocks >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT;
2394
2395 dev->size_low = __cpu_to_le32((__u32) array_blocks);
2396 dev->size_high = __cpu_to_le32((__u32) (array_blocks >> 32));
2397 dev->status = __cpu_to_le32(0);
2398 dev->reserved_blocks = __cpu_to_le32(0);
2399 vol = &dev->vol;
2400 vol->migr_state = 0;
2401 set_migr_type(dev, MIGR_INIT);
2402 vol->dirty = 0;
2403 vol->curr_migr_unit = 0;
2404 map = get_imsm_map(dev, 0);
2405 map->pba_of_lba0 = __cpu_to_le32(super->create_offset);
2406 map->blocks_per_member = __cpu_to_le32(info_to_blocks_per_member(info));
2407 map->blocks_per_strip = __cpu_to_le16(info_to_blocks_per_strip(info));
2408 map->failed_disk_num = ~0;
2409 map->map_state = info->level ? IMSM_T_STATE_UNINITIALIZED :
2410 IMSM_T_STATE_NORMAL;
2411 map->ddf = 1;
2412
2413 if (info->level == 1 && info->raid_disks > 2) {
2414 fprintf(stderr, Name": imsm does not support more than 2 disks"
2415 "in a raid1 volume\n");
2416 return 0;
2417 }
2418
2419 map->raid_level = info->level;
2420 if (info->level == 10) {
2421 map->raid_level = 1;
2422 map->num_domains = info->raid_disks / 2;
2423 } else if (info->level == 1)
2424 map->num_domains = info->raid_disks;
2425 else
2426 map->num_domains = 1;
2427
2428 num_data_stripes = info_to_num_data_stripes(info, map->num_domains);
2429 map->num_data_stripes = __cpu_to_le32(num_data_stripes);
2430
2431 map->num_members = info->raid_disks;
2432 for (i = 0; i < map->num_members; i++) {
2433 /* initialized in add_to_super */
2434 set_imsm_ord_tbl_ent(map, i, 0);
2435 }
2436 mpb->num_raid_devs++;
2437
2438 dv->dev = dev;
2439 dv->index = super->current_vol;
2440 dv->next = super->devlist;
2441 super->devlist = dv;
2442
2443 imsm_update_version_info(super);
2444
2445 return 1;
2446 }
2447
2448 static int init_super_imsm(struct supertype *st, mdu_array_info_t *info,
2449 unsigned long long size, char *name,
2450 char *homehost, int *uuid)
2451 {
2452 /* This is primarily called by Create when creating a new array.
2453 * We will then get add_to_super called for each component, and then
2454 * write_init_super called to write it out to each device.
2455 * For IMSM, Create can create on fresh devices or on a pre-existing
2456 * array.
2457 * To create on a pre-existing array a different method will be called.
2458 * This one is just for fresh drives.
2459 */
2460 struct intel_super *super;
2461 struct imsm_super *mpb;
2462 size_t mpb_size;
2463 char *version;
2464
2465 if (!info) {
2466 st->sb = NULL;
2467 return 0;
2468 }
2469 if (st->sb)
2470 return init_super_imsm_volume(st, info, size, name, homehost,
2471 uuid);
2472
2473 super = alloc_super(1);
2474 if (!super)
2475 return 0;
2476 mpb_size = disks_to_mpb_size(info->nr_disks);
2477 if (posix_memalign(&super->buf, 512, mpb_size) != 0) {
2478 free(super);
2479 return 0;
2480 }
2481 mpb = super->buf;
2482 memset(mpb, 0, mpb_size);
2483
2484 mpb->attributes = MPB_ATTRIB_CHECKSUM_VERIFY;
2485
2486 version = (char *) mpb->sig;
2487 strcpy(version, MPB_SIGNATURE);
2488 version += strlen(MPB_SIGNATURE);
2489 strcpy(version, MPB_VERSION_RAID0);
2490 mpb->mpb_size = mpb_size;
2491
2492 st->sb = super;
2493 return 1;
2494 }
2495
2496 #ifndef MDASSEMBLE
2497 static int add_to_super_imsm_volume(struct supertype *st, mdu_disk_info_t *dk,
2498 int fd, char *devname)
2499 {
2500 struct intel_super *super = st->sb;
2501 struct imsm_super *mpb = super->anchor;
2502 struct dl *dl;
2503 struct imsm_dev *dev;
2504 struct imsm_map *map;
2505
2506 dev = get_imsm_dev(super, super->current_vol);
2507 map = get_imsm_map(dev, 0);
2508
2509 if (! (dk->state & (1<<MD_DISK_SYNC))) {
2510 fprintf(stderr, Name ": %s: Cannot add spare devices to IMSM volume\n",
2511 devname);
2512 return 1;
2513 }
2514
2515 if (fd == -1) {
2516 /* we're doing autolayout so grab the pre-marked (in
2517 * validate_geometry) raid_disk
2518 */
2519 for (dl = super->disks; dl; dl = dl->next)
2520 if (dl->raiddisk == dk->raid_disk)
2521 break;
2522 } else {
2523 for (dl = super->disks; dl ; dl = dl->next)
2524 if (dl->major == dk->major &&
2525 dl->minor == dk->minor)
2526 break;
2527 }
2528
2529 if (!dl) {
2530 fprintf(stderr, Name ": %s is not a member of the same container\n", devname);
2531 return 1;
2532 }
2533
2534 /* add a pristine spare to the metadata */
2535 if (dl->index < 0) {
2536 dl->index = super->anchor->num_disks;
2537 super->anchor->num_disks++;
2538 }
2539 set_imsm_ord_tbl_ent(map, dk->number, dl->index);
2540 dl->disk.status = CONFIGURED_DISK | USABLE_DISK;
2541
2542 /* if we are creating the first raid device update the family number */
2543 if (super->current_vol == 0) {
2544 __u32 sum;
2545 struct imsm_dev *_dev = __get_imsm_dev(mpb, 0);
2546 struct imsm_disk *_disk = __get_imsm_disk(mpb, dl->index);
2547
2548 *_dev = *dev;
2549 *_disk = dl->disk;
2550 sum = __gen_imsm_checksum(mpb);
2551 mpb->family_num = __cpu_to_le32(sum);
2552 }
2553
2554 return 0;
2555 }
2556
2557 static int add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk,
2558 int fd, char *devname)
2559 {
2560 struct intel_super *super = st->sb;
2561 struct dl *dd;
2562 unsigned long long size;
2563 __u32 id;
2564 int rv;
2565 struct stat stb;
2566
2567 /* if we are on an RAID enabled platform check that the disk is
2568 * attached to the raid controller
2569 */
2570 if (super->hba && !disk_attached_to_hba(fd, super->hba)) {
2571 fprintf(stderr,
2572 Name ": %s is not attached to the raid controller: %s\n",
2573 devname ? : "disk", super->hba);
2574 return 1;
2575 }
2576
2577 if (super->current_vol >= 0)
2578 return add_to_super_imsm_volume(st, dk, fd, devname);
2579
2580 fstat(fd, &stb);
2581 dd = malloc(sizeof(*dd));
2582 if (!dd) {
2583 fprintf(stderr,
2584 Name ": malloc failed %s:%d.\n", __func__, __LINE__);
2585 return 1;
2586 }
2587 memset(dd, 0, sizeof(*dd));
2588 dd->major = major(stb.st_rdev);
2589 dd->minor = minor(stb.st_rdev);
2590 dd->index = -1;
2591 dd->devname = devname ? strdup(devname) : NULL;
2592 dd->fd = fd;
2593 dd->e = NULL;
2594 rv = imsm_read_serial(fd, devname, dd->serial);
2595 if (rv) {
2596 fprintf(stderr,
2597 Name ": failed to retrieve scsi serial, aborting\n");
2598 free(dd);
2599 abort();
2600 }
2601
2602 get_dev_size(fd, NULL, &size);
2603 size /= 512;
2604 serialcpy(dd->disk.serial, dd->serial);
2605 dd->disk.total_blocks = __cpu_to_le32(size);
2606 dd->disk.status = USABLE_DISK | SPARE_DISK;
2607 if (sysfs_disk_to_scsi_id(fd, &id) == 0)
2608 dd->disk.scsi_id = __cpu_to_le32(id);
2609 else
2610 dd->disk.scsi_id = __cpu_to_le32(0);
2611
2612 if (st->update_tail) {
2613 dd->next = super->add;
2614 super->add = dd;
2615 } else {
2616 dd->next = super->disks;
2617 super->disks = dd;
2618 }
2619
2620 return 0;
2621 }
2622
2623 static int store_imsm_mpb(int fd, struct intel_super *super);
2624
2625 /* spare records have their own family number and do not have any defined raid
2626 * devices
2627 */
2628 static int write_super_imsm_spares(struct intel_super *super, int doclose)
2629 {
2630 struct imsm_super mpb_save;
2631 struct imsm_super *mpb = super->anchor;
2632 __u32 sum;
2633 struct dl *d;
2634
2635 mpb_save = *mpb;
2636 mpb->num_raid_devs = 0;
2637 mpb->num_disks = 1;
2638 mpb->mpb_size = sizeof(struct imsm_super);
2639 mpb->generation_num = __cpu_to_le32(1UL);
2640
2641 for (d = super->disks; d; d = d->next) {
2642 if (d->index != -1)
2643 continue;
2644
2645 mpb->disk[0] = d->disk;
2646 sum = __gen_imsm_checksum(mpb);
2647 mpb->family_num = __cpu_to_le32(sum);
2648 sum = __gen_imsm_checksum(mpb);
2649 mpb->check_sum = __cpu_to_le32(sum);
2650
2651 if (store_imsm_mpb(d->fd, super)) {
2652 fprintf(stderr, "%s: failed for device %d:%d %s\n",
2653 __func__, d->major, d->minor, strerror(errno));
2654 *mpb = mpb_save;
2655 return 1;
2656 }
2657 if (doclose) {
2658 close(d->fd);
2659 d->fd = -1;
2660 }
2661 }
2662
2663 *mpb = mpb_save;
2664 return 0;
2665 }
2666
2667 static int write_super_imsm(struct intel_super *super, int doclose)
2668 {
2669 struct imsm_super *mpb = super->anchor;
2670 struct dl *d;
2671 __u32 generation;
2672 __u32 sum;
2673 int spares = 0;
2674 int i;
2675 __u32 mpb_size = sizeof(struct imsm_super) - sizeof(struct imsm_disk);
2676
2677 /* 'generation' is incremented everytime the metadata is written */
2678 generation = __le32_to_cpu(mpb->generation_num);
2679 generation++;
2680 mpb->generation_num = __cpu_to_le32(generation);
2681
2682 mpb_size += sizeof(struct imsm_disk) * mpb->num_disks;
2683 for (d = super->disks; d; d = d->next) {
2684 if (d->index == -1)
2685 spares++;
2686 else
2687 mpb->disk[d->index] = d->disk;
2688 }
2689 for (d = super->missing; d; d = d->next)
2690 mpb->disk[d->index] = d->disk;
2691
2692 for (i = 0; i < mpb->num_raid_devs; i++) {
2693 struct imsm_dev *dev = __get_imsm_dev(mpb, i);
2694
2695 imsm_copy_dev(dev, get_imsm_dev(super, i));
2696 mpb_size += sizeof_imsm_dev(dev, 0);
2697 }
2698 mpb_size += __le32_to_cpu(mpb->bbm_log_size);
2699 mpb->mpb_size = __cpu_to_le32(mpb_size);
2700
2701 /* recalculate checksum */
2702 sum = __gen_imsm_checksum(mpb);
2703 mpb->check_sum = __cpu_to_le32(sum);
2704
2705 /* write the mpb for disks that compose raid devices */
2706 for (d = super->disks; d ; d = d->next) {
2707 if (d->index < 0)
2708 continue;
2709 if (store_imsm_mpb(d->fd, super))
2710 fprintf(stderr, "%s: failed for device %d:%d %s\n",
2711 __func__, d->major, d->minor, strerror(errno));
2712 if (doclose) {
2713 close(d->fd);
2714 d->fd = -1;
2715 }
2716 }
2717
2718 if (spares)
2719 return write_super_imsm_spares(super, doclose);
2720
2721 return 0;
2722 }
2723
2724
2725 static int create_array(struct supertype *st)
2726 {
2727 size_t len;
2728 struct imsm_update_create_array *u;
2729 struct intel_super *super = st->sb;
2730 struct imsm_dev *dev = get_imsm_dev(super, super->current_vol);
2731 struct imsm_map *map = get_imsm_map(dev, 0);
2732 struct disk_info *inf;
2733 struct imsm_disk *disk;
2734 int i;
2735 int idx;
2736
2737 len = sizeof(*u) - sizeof(*dev) + sizeof_imsm_dev(dev, 0) +
2738 sizeof(*inf) * map->num_members;
2739 u = malloc(len);
2740 if (!u) {
2741 fprintf(stderr, "%s: failed to allocate update buffer\n",
2742 __func__);
2743 return 1;
2744 }
2745
2746 u->type = update_create_array;
2747 u->dev_idx = super->current_vol;
2748 imsm_copy_dev(&u->dev, dev);
2749 inf = get_disk_info(u);
2750 for (i = 0; i < map->num_members; i++) {
2751 idx = get_imsm_disk_idx(dev, i);
2752 disk = get_imsm_disk(super, idx);
2753 serialcpy(inf[i].serial, disk->serial);
2754 }
2755 append_metadata_update(st, u, len);
2756
2757 return 0;
2758 }
2759
2760 static int _add_disk(struct supertype *st)
2761 {
2762 struct intel_super *super = st->sb;
2763 size_t len;
2764 struct imsm_update_add_disk *u;
2765
2766 if (!super->add)
2767 return 0;
2768
2769 len = sizeof(*u);
2770 u = malloc(len);
2771 if (!u) {
2772 fprintf(stderr, "%s: failed to allocate update buffer\n",
2773 __func__);
2774 return 1;
2775 }
2776
2777 u->type = update_add_disk;
2778 append_metadata_update(st, u, len);
2779
2780 return 0;
2781 }
2782
2783 static int write_init_super_imsm(struct supertype *st)
2784 {
2785 if (st->update_tail) {
2786 /* queue the recently created array / added disk
2787 * as a metadata update */
2788 struct intel_super *super = st->sb;
2789 struct dl *d;
2790 int rv;
2791
2792 /* determine if we are creating a volume or adding a disk */
2793 if (super->current_vol < 0) {
2794 /* in the add disk case we are running in mdmon
2795 * context, so don't close fd's
2796 */
2797 return _add_disk(st);
2798 } else
2799 rv = create_array(st);
2800
2801 for (d = super->disks; d ; d = d->next) {
2802 close(d->fd);
2803 d->fd = -1;
2804 }
2805
2806 return rv;
2807 } else
2808 return write_super_imsm(st->sb, 1);
2809 }
2810 #endif
2811
2812 static int store_zero_imsm(struct supertype *st, int fd)
2813 {
2814 unsigned long long dsize;
2815 void *buf;
2816
2817 get_dev_size(fd, NULL, &dsize);
2818
2819 /* first block is stored on second to last sector of the disk */
2820 if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
2821 return 1;
2822
2823 if (posix_memalign(&buf, 512, 512) != 0)
2824 return 1;
2825
2826 memset(buf, 0, 512);
2827 if (write(fd, buf, 512) != 512)
2828 return 1;
2829 return 0;
2830 }
2831
2832 static int imsm_bbm_log_size(struct imsm_super *mpb)
2833 {
2834 return __le32_to_cpu(mpb->bbm_log_size);
2835 }
2836
2837 #ifndef MDASSEMBLE
2838 static int validate_geometry_imsm_container(struct supertype *st, int level,
2839 int layout, int raiddisks, int chunk,
2840 unsigned long long size, char *dev,
2841 unsigned long long *freesize,
2842 int verbose)
2843 {
2844 int fd;
2845 unsigned long long ldsize;
2846 const struct imsm_orom *orom;
2847
2848 if (level != LEVEL_CONTAINER)
2849 return 0;
2850 if (!dev)
2851 return 1;
2852
2853 if (check_env("IMSM_NO_PLATFORM"))
2854 orom = NULL;
2855 else
2856 orom = find_imsm_orom();
2857 if (orom && raiddisks > orom->tds) {
2858 if (verbose)
2859 fprintf(stderr, Name ": %d exceeds maximum number of"
2860 " platform supported disks: %d\n",
2861 raiddisks, orom->tds);
2862 return 0;
2863 }
2864
2865 fd = open(dev, O_RDONLY|O_EXCL, 0);
2866 if (fd < 0) {
2867 if (verbose)
2868 fprintf(stderr, Name ": imsm: Cannot open %s: %s\n",
2869 dev, strerror(errno));
2870 return 0;
2871 }
2872 if (!get_dev_size(fd, dev, &ldsize)) {
2873 close(fd);
2874 return 0;
2875 }
2876 close(fd);
2877
2878 *freesize = avail_size_imsm(st, ldsize >> 9);
2879
2880 return 1;
2881 }
2882
2883 static unsigned long long find_size(struct extent *e, int *idx, int num_extents)
2884 {
2885 const unsigned long long base_start = e[*idx].start;
2886 unsigned long long end = base_start + e[*idx].size;
2887 int i;
2888
2889 if (base_start == end)
2890 return 0;
2891
2892 *idx = *idx + 1;
2893 for (i = *idx; i < num_extents; i++) {
2894 /* extend overlapping extents */
2895 if (e[i].start >= base_start &&
2896 e[i].start <= end) {
2897 if (e[i].size == 0)
2898 return 0;
2899 if (e[i].start + e[i].size > end)
2900 end = e[i].start + e[i].size;
2901 } else if (e[i].start > end) {
2902 *idx = i;
2903 break;
2904 }
2905 }
2906
2907 return end - base_start;
2908 }
2909
2910 static unsigned long long merge_extents(struct intel_super *super, int sum_extents)
2911 {
2912 /* build a composite disk with all known extents and generate a new
2913 * 'maxsize' given the "all disks in an array must share a common start
2914 * offset" constraint
2915 */
2916 struct extent *e = calloc(sum_extents, sizeof(*e));
2917 struct dl *dl;
2918 int i, j;
2919 int start_extent;
2920 unsigned long long pos;
2921 unsigned long long start = 0;
2922 unsigned long long maxsize;
2923 unsigned long reserve;
2924
2925 if (!e)
2926 return ~0ULL; /* error */
2927
2928 /* coalesce and sort all extents. also, check to see if we need to
2929 * reserve space between member arrays
2930 */
2931 j = 0;
2932 for (dl = super->disks; dl; dl = dl->next) {
2933 if (!dl->e)
2934 continue;
2935 for (i = 0; i < dl->extent_cnt; i++)
2936 e[j++] = dl->e[i];
2937 }
2938 qsort(e, sum_extents, sizeof(*e), cmp_extent);
2939
2940 /* merge extents */
2941 i = 0;
2942 j = 0;
2943 while (i < sum_extents) {
2944 e[j].start = e[i].start;
2945 e[j].size = find_size(e, &i, sum_extents);
2946 j++;
2947 if (e[j-1].size == 0)
2948 break;
2949 }
2950
2951 pos = 0;
2952 maxsize = 0;
2953 start_extent = 0;
2954 i = 0;
2955 do {
2956 unsigned long long esize;
2957
2958 esize = e[i].start - pos;
2959 if (esize >= maxsize) {
2960 maxsize = esize;
2961 start = pos;
2962 start_extent = i;
2963 }
2964 pos = e[i].start + e[i].size;
2965 i++;
2966 } while (e[i-1].size);
2967 free(e);
2968
2969 if (start_extent > 0)
2970 reserve = IMSM_RESERVED_SECTORS; /* gap between raid regions */
2971 else
2972 reserve = 0;
2973
2974 if (maxsize < reserve)
2975 return ~0ULL;
2976
2977 super->create_offset = ~((__u32) 0);
2978 if (start + reserve > super->create_offset)
2979 return ~0ULL; /* start overflows create_offset */
2980 super->create_offset = start + reserve;
2981
2982 return maxsize - reserve;
2983 }
2984
2985 static int is_raid_level_supported(const struct imsm_orom *orom, int level, int raiddisks)
2986 {
2987 if (level < 0 || level == 6 || level == 4)
2988 return 0;
2989
2990 /* if we have an orom prevent invalid raid levels */
2991 if (orom)
2992 switch (level) {
2993 case 0: return imsm_orom_has_raid0(orom);
2994 case 1:
2995 if (raiddisks > 2)
2996 return imsm_orom_has_raid1e(orom);
2997 return imsm_orom_has_raid1(orom) && raiddisks == 2;
2998 case 10: return imsm_orom_has_raid10(orom) && raiddisks == 4;
2999 case 5: return imsm_orom_has_raid5(orom) && raiddisks > 2;
3000 }
3001 else
3002 return 1; /* not on an Intel RAID platform so anything goes */
3003
3004 return 0;
3005 }
3006
3007 #define pr_vrb(fmt, arg...) (void) (verbose && fprintf(stderr, Name fmt, ##arg))
3008 /* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd
3009 * FIX ME add ahci details
3010 */
3011 static int validate_geometry_imsm_volume(struct supertype *st, int level,
3012 int layout, int raiddisks, int chunk,
3013 unsigned long long size, char *dev,
3014 unsigned long long *freesize,
3015 int verbose)
3016 {
3017 struct stat stb;
3018 struct intel_super *super = st->sb;
3019 struct imsm_super *mpb = super->anchor;
3020 struct dl *dl;
3021 unsigned long long pos = 0;
3022 unsigned long long maxsize;
3023 struct extent *e;
3024 int i;
3025
3026 /* We must have the container info already read in. */
3027 if (!super)
3028 return 0;
3029
3030 if (!is_raid_level_supported(super->orom, level, raiddisks)) {
3031 pr_vrb(": platform does not support raid%d with %d disk%s\n",
3032 level, raiddisks, raiddisks > 1 ? "s" : "");
3033 return 0;
3034 }
3035 if (super->orom && level != 1 &&
3036 !imsm_orom_has_chunk(super->orom, chunk)) {
3037 pr_vrb(": platform does not support a chunk size of: %d\n", chunk);
3038 return 0;
3039 }
3040 if (layout != imsm_level_to_layout(level)) {
3041 if (level == 5)
3042 pr_vrb(": imsm raid 5 only supports the left-asymmetric layout\n");
3043 else if (level == 10)
3044 pr_vrb(": imsm raid 10 only supports the n2 layout\n");
3045 else
3046 pr_vrb(": imsm unknown layout %#x for this raid level %d\n",
3047 layout, level);
3048 return 0;
3049 }
3050
3051 if (!dev) {
3052 /* General test: make sure there is space for
3053 * 'raiddisks' device extents of size 'size' at a given
3054 * offset
3055 */
3056 unsigned long long minsize = size;
3057 unsigned long long start_offset = ~0ULL;
3058 int dcnt = 0;
3059 if (minsize == 0)
3060 minsize = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS;
3061 for (dl = super->disks; dl ; dl = dl->next) {
3062 int found = 0;
3063
3064 pos = 0;
3065 i = 0;
3066 e = get_extents(super, dl);
3067 if (!e) continue;
3068 do {
3069 unsigned long long esize;
3070 esize = e[i].start - pos;
3071 if (esize >= minsize)
3072 found = 1;
3073 if (found && start_offset == ~0ULL) {
3074 start_offset = pos;
3075 break;
3076 } else if (found && pos != start_offset) {
3077 found = 0;
3078 break;
3079 }
3080 pos = e[i].start + e[i].size;
3081 i++;
3082 } while (e[i-1].size);
3083 if (found)
3084 dcnt++;
3085 free(e);
3086 }
3087 if (dcnt < raiddisks) {
3088 if (verbose)
3089 fprintf(stderr, Name ": imsm: Not enough "
3090 "devices with space for this array "
3091 "(%d < %d)\n",
3092 dcnt, raiddisks);
3093 return 0;
3094 }
3095 return 1;
3096 }
3097
3098 /* This device must be a member of the set */
3099 if (stat(dev, &stb) < 0)
3100 return 0;
3101 if ((S_IFMT & stb.st_mode) != S_IFBLK)
3102 return 0;
3103 for (dl = super->disks ; dl ; dl = dl->next) {
3104 if (dl->major == major(stb.st_rdev) &&
3105 dl->minor == minor(stb.st_rdev))
3106 break;
3107 }
3108 if (!dl) {
3109 if (verbose)
3110 fprintf(stderr, Name ": %s is not in the "
3111 "same imsm set\n", dev);
3112 return 0;
3113 } else if (super->orom && dl->index < 0 && mpb->num_raid_devs) {
3114 /* If a volume is present then the current creation attempt
3115 * cannot incorporate new spares because the orom may not
3116 * understand this configuration (all member disks must be
3117 * members of each array in the container).
3118 */
3119 fprintf(stderr, Name ": %s is a spare and a volume"
3120 " is already defined for this container\n", dev);
3121 fprintf(stderr, Name ": The option-rom requires all member"
3122 " disks to be a member of all volumes\n");
3123 return 0;
3124 }
3125
3126 /* retrieve the largest free space block */
3127 e = get_extents(super, dl);
3128 maxsize = 0;
3129 i = 0;
3130 if (e) {
3131 do {
3132 unsigned long long esize;
3133
3134 esize = e[i].start - pos;
3135 if (esize >= maxsize)
3136 maxsize = esize;
3137 pos = e[i].start + e[i].size;
3138 i++;
3139 } while (e[i-1].size);
3140 dl->e = e;
3141 dl->extent_cnt = i;
3142 } else {
3143 if (verbose)
3144 fprintf(stderr, Name ": unable to determine free space for: %s\n",
3145 dev);
3146 return 0;
3147 }
3148 if (maxsize < size) {
3149 if (verbose)
3150 fprintf(stderr, Name ": %s not enough space (%llu < %llu)\n",
3151 dev, maxsize, size);
3152 return 0;
3153 }
3154
3155 /* count total number of extents for merge */
3156 i = 0;
3157 for (dl = super->disks; dl; dl = dl->next)
3158 if (dl->e)
3159 i += dl->extent_cnt;
3160
3161 maxsize = merge_extents(super, i);
3162 if (maxsize < size) {
3163 if (verbose)
3164 fprintf(stderr, Name ": not enough space after merge (%llu < %llu)\n",
3165 maxsize, size);
3166 return 0;
3167 } else if (maxsize == ~0ULL) {
3168 if (verbose)
3169 fprintf(stderr, Name ": failed to merge %d extents\n", i);
3170 return 0;
3171 }
3172
3173 *freesize = maxsize;
3174
3175 return 1;
3176 }
3177
3178 static int reserve_space(struct supertype *st, int raiddisks,
3179 unsigned long long size, int chunk,
3180 unsigned long long *freesize)
3181 {
3182 struct intel_super *super = st->sb;
3183 struct imsm_super *mpb = super->anchor;
3184 struct dl *dl;
3185 int i;
3186 int extent_cnt;
3187 struct extent *e;
3188 unsigned long long maxsize;
3189 unsigned long long minsize;
3190 int cnt;
3191 int used;
3192
3193 /* find the largest common start free region of the possible disks */
3194 used = 0;
3195 extent_cnt = 0;
3196 cnt = 0;
3197 for (dl = super->disks; dl; dl = dl->next) {
3198 dl->raiddisk = -1;
3199
3200 if (dl->index >= 0)
3201 used++;
3202
3203 /* don't activate new spares if we are orom constrained
3204 * and there is already a volume active in the container
3205 */
3206 if (super->orom && dl->index < 0 && mpb->num_raid_devs)
3207 continue;
3208
3209 e = get_extents(super, dl);
3210 if (!e)
3211 continue;
3212 for (i = 1; e[i-1].size; i++)
3213 ;
3214 dl->e = e;
3215 dl->extent_cnt = i;
3216 extent_cnt += i;
3217 cnt++;
3218 }
3219
3220 maxsize = merge_extents(super, extent_cnt);
3221 minsize = size;
3222 if (size == 0)
3223 minsize = chunk;
3224
3225 if (cnt < raiddisks ||
3226 (super->orom && used && used != raiddisks) ||
3227 maxsize < minsize) {
3228 fprintf(stderr, Name ": not enough devices with space to create array.\n");
3229 return 0; /* No enough free spaces large enough */
3230 }
3231
3232 if (size == 0) {
3233 size = maxsize;
3234 if (chunk) {
3235 size /= chunk;
3236 size *= chunk;
3237 }
3238 }
3239
3240 cnt = 0;
3241 for (dl = super->disks; dl; dl = dl->next)
3242 if (dl->e)
3243 dl->raiddisk = cnt++;
3244
3245 *freesize = size;
3246
3247 return 1;
3248 }
3249
3250 static int validate_geometry_imsm(struct supertype *st, int level, int layout,
3251 int raiddisks, int chunk, unsigned long long size,
3252 char *dev, unsigned long long *freesize,
3253 int verbose)
3254 {
3255 int fd, cfd;
3256 struct mdinfo *sra;
3257
3258 /* if given unused devices create a container
3259 * if given given devices in a container create a member volume
3260 */
3261 if (level == LEVEL_CONTAINER) {
3262 /* Must be a fresh device to add to a container */
3263 return validate_geometry_imsm_container(st, level, layout,
3264 raiddisks, chunk, size,
3265 dev, freesize,
3266 verbose);
3267 }
3268
3269 if (!dev) {
3270 if (st->sb && freesize) {
3271 /* we are being asked to automatically layout a
3272 * new volume based on the current contents of
3273 * the container. If the the parameters can be
3274 * satisfied reserve_space will record the disks,
3275 * start offset, and size of the volume to be
3276 * created. add_to_super and getinfo_super
3277 * detect when autolayout is in progress.
3278 */
3279 return reserve_space(st, raiddisks, size, chunk, freesize);
3280 }
3281 return 1;
3282 }
3283 if (st->sb) {
3284 /* creating in a given container */
3285 return validate_geometry_imsm_volume(st, level, layout,
3286 raiddisks, chunk, size,
3287 dev, freesize, verbose);
3288 }
3289
3290 /* limit creation to the following levels */
3291 if (!dev)
3292 switch (level) {
3293 case 0:
3294 case 1:
3295 case 10:
3296 case 5:
3297 break;
3298 default:
3299 return 1;
3300 }
3301
3302 /* This device needs to be a device in an 'imsm' container */
3303 fd = open(dev, O_RDONLY|O_EXCL, 0);
3304 if (fd >= 0) {
3305 if (verbose)
3306 fprintf(stderr,
3307 Name ": Cannot create this array on device %s\n",
3308 dev);
3309 close(fd);
3310 return 0;
3311 }
3312 if (errno != EBUSY || (fd = open(dev, O_RDONLY, 0)) < 0) {
3313 if (verbose)
3314 fprintf(stderr, Name ": Cannot open %s: %s\n",
3315 dev, strerror(errno));
3316 return 0;
3317 }
3318 /* Well, it is in use by someone, maybe an 'imsm' container. */
3319 cfd = open_container(fd);
3320 if (cfd < 0) {
3321 close(fd);
3322 if (verbose)
3323 fprintf(stderr, Name ": Cannot use %s: It is busy\n",
3324 dev);
3325 return 0;
3326 }
3327 sra = sysfs_read(cfd, 0, GET_VERSION);
3328 close(fd);
3329 if (sra && sra->array.major_version == -1 &&
3330 strcmp(sra->text_version, "imsm") == 0) {
3331 /* This is a member of a imsm container. Load the container
3332 * and try to create a volume
3333 */
3334 struct intel_super *super;
3335
3336 if (load_super_imsm_all(st, cfd, (void **) &super, NULL, 1) == 0) {
3337 st->sb = super;
3338 st->container_dev = fd2devnum(cfd);
3339 close(cfd);
3340 return validate_geometry_imsm_volume(st, level, layout,
3341 raiddisks, chunk,
3342 size, dev,
3343 freesize, verbose);
3344 }
3345 close(cfd);
3346 } else /* may belong to another container */
3347 return 0;
3348
3349 return 1;
3350 }
3351 #endif /* MDASSEMBLE */
3352
3353 static struct mdinfo *container_content_imsm(struct supertype *st)
3354 {
3355 /* Given a container loaded by load_super_imsm_all,
3356 * extract information about all the arrays into
3357 * an mdinfo tree.
3358 *
3359 * For each imsm_dev create an mdinfo, fill it in,
3360 * then look for matching devices in super->disks
3361 * and create appropriate device mdinfo.
3362 */
3363 struct intel_super *super = st->sb;
3364 struct imsm_super *mpb = super->anchor;
3365 struct mdinfo *rest = NULL;
3366 int i;
3367
3368 /* do not assemble arrays that might have bad blocks */
3369 if (imsm_bbm_log_size(super->anchor)) {
3370 fprintf(stderr, Name ": BBM log found in metadata. "
3371 "Cannot activate array(s).\n");
3372 return NULL;
3373 }
3374
3375 for (i = 0; i < mpb->num_raid_devs; i++) {
3376 struct imsm_dev *dev = get_imsm_dev(super, i);
3377 struct imsm_map *map = get_imsm_map(dev, 0);
3378 struct mdinfo *this;
3379 int slot;
3380
3381 /* do not publish arrays that are in the middle of an
3382 * unsupported migration
3383 */
3384 if (dev->vol.migr_state &&
3385 (migr_type(dev) == MIGR_GEN_MIGR ||
3386 migr_type(dev) == MIGR_STATE_CHANGE)) {
3387 fprintf(stderr, Name ": cannot assemble volume '%.16s':"
3388 " unsupported migration in progress\n",
3389 dev->volume);
3390 continue;
3391 }
3392
3393 this = malloc(sizeof(*this));
3394 memset(this, 0, sizeof(*this));
3395 this->next = rest;
3396
3397 super->current_vol = i;
3398 getinfo_super_imsm_volume(st, this);
3399 for (slot = 0 ; slot < map->num_members; slot++) {
3400 struct mdinfo *info_d;
3401 struct dl *d;
3402 int idx;
3403 int skip;
3404 __u32 s;
3405 __u32 ord;
3406
3407 skip = 0;
3408 idx = get_imsm_disk_idx(dev, slot);
3409 ord = get_imsm_ord_tbl_ent(dev, slot);
3410 for (d = super->disks; d ; d = d->next)
3411 if (d->index == idx)
3412 break;
3413
3414 if (d == NULL)
3415 skip = 1;
3416
3417 s = d ? d->disk.status : 0;
3418 if (s & FAILED_DISK)
3419 skip = 1;
3420 if (!(s & USABLE_DISK))
3421 skip = 1;
3422 if (ord & IMSM_ORD_REBUILD)
3423 skip = 1;
3424
3425 /*
3426 * if we skip some disks the array will be assmebled degraded;
3427 * reset resync start to avoid a dirty-degraded situation
3428 *
3429 * FIXME handle dirty degraded
3430 */
3431 if (skip && !dev->vol.dirty)
3432 this->resync_start = ~0ULL;
3433 if (skip)
3434 continue;
3435
3436 info_d = malloc(sizeof(*info_d));
3437 if (!info_d) {
3438 fprintf(stderr, Name ": failed to allocate disk"
3439 " for volume %.16s\n", dev->volume);
3440 free(this);
3441 this = rest;
3442 break;
3443 }
3444 memset(info_d, 0, sizeof(*info_d));
3445 info_d->next = this->devs;
3446 this->devs = info_d;
3447
3448 info_d->disk.number = d->index;
3449 info_d->disk.major = d->major;
3450 info_d->disk.minor = d->minor;
3451 info_d->disk.raid_disk = slot;
3452
3453 this->array.working_disks++;
3454
3455 info_d->events = __le32_to_cpu(mpb->generation_num);
3456 info_d->data_offset = __le32_to_cpu(map->pba_of_lba0);
3457 info_d->component_size = __le32_to_cpu(map->blocks_per_member);
3458 if (d->devname)
3459 strcpy(info_d->name, d->devname);
3460 }
3461 rest = this;
3462 }
3463
3464 return rest;
3465 }
3466
3467
3468 #ifndef MDASSEMBLE
3469 static int imsm_open_new(struct supertype *c, struct active_array *a,
3470 char *inst)
3471 {
3472 struct intel_super *super = c->sb;
3473 struct imsm_super *mpb = super->anchor;
3474
3475 if (atoi(inst) >= mpb->num_raid_devs) {
3476 fprintf(stderr, "%s: subarry index %d, out of range\n",
3477 __func__, atoi(inst));
3478 return -ENODEV;
3479 }
3480
3481 dprintf("imsm: open_new %s\n", inst);
3482 a->info.container_member = atoi(inst);
3483 return 0;
3484 }
3485
3486 static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev, int failed)
3487 {
3488 struct imsm_map *map = get_imsm_map(dev, 0);
3489
3490 if (!failed)
3491 return map->map_state == IMSM_T_STATE_UNINITIALIZED ?
3492 IMSM_T_STATE_UNINITIALIZED : IMSM_T_STATE_NORMAL;
3493
3494 switch (get_imsm_raid_level(map)) {
3495 case 0:
3496 return IMSM_T_STATE_FAILED;
3497 break;
3498 case 1:
3499 if (failed < map->num_members)
3500 return IMSM_T_STATE_DEGRADED;
3501 else
3502 return IMSM_T_STATE_FAILED;
3503 break;
3504 case 10:
3505 {
3506 /**
3507 * check to see if any mirrors have failed, otherwise we
3508 * are degraded. Even numbered slots are mirrored on
3509 * slot+1
3510 */
3511 int i;
3512 /* gcc -Os complains that this is unused */
3513 int insync = insync;
3514
3515 for (i = 0; i < map->num_members; i++) {
3516 __u32 ord = get_imsm_ord_tbl_ent(dev, i);
3517 int idx = ord_to_idx(ord);
3518 struct imsm_disk *disk;
3519
3520 /* reset the potential in-sync count on even-numbered
3521 * slots. num_copies is always 2 for imsm raid10
3522 */
3523 if ((i & 1) == 0)
3524 insync = 2;
3525
3526 disk = get_imsm_disk(super, idx);
3527 if (!disk || disk->status & FAILED_DISK ||
3528 ord & IMSM_ORD_REBUILD)
3529 insync--;
3530
3531 /* no in-sync disks left in this mirror the
3532 * array has failed
3533 */
3534 if (insync == 0)
3535 return IMSM_T_STATE_FAILED;
3536 }
3537
3538 return IMSM_T_STATE_DEGRADED;
3539 }
3540 case 5:
3541 if (failed < 2)
3542 return IMSM_T_STATE_DEGRADED;
3543 else
3544 return IMSM_T_STATE_FAILED;
3545 break;
3546 default:
3547 break;
3548 }
3549
3550 return map->map_state;
3551 }
3552
3553 static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev)
3554 {
3555 int i;
3556 int failed = 0;
3557 struct imsm_disk *disk;
3558 struct imsm_map *map = get_imsm_map(dev, 0);
3559 struct imsm_map *prev = get_imsm_map(dev, dev->vol.migr_state);
3560 __u32 ord;
3561 int idx;
3562
3563 /* at the beginning of migration we set IMSM_ORD_REBUILD on
3564 * disks that are being rebuilt. New failures are recorded to
3565 * map[0]. So we look through all the disks we started with and
3566 * see if any failures are still present, or if any new ones
3567 * have arrived
3568 *
3569 * FIXME add support for online capacity expansion and
3570 * raid-level-migration
3571 */
3572 for (i = 0; i < prev->num_members; i++) {
3573 ord = __le32_to_cpu(prev->disk_ord_tbl[i]);
3574 ord |= __le32_to_cpu(map->disk_ord_tbl[i]);
3575 idx = ord_to_idx(ord);
3576
3577 disk = get_imsm_disk(super, idx);
3578 if (!disk || disk->status & FAILED_DISK ||
3579 ord & IMSM_ORD_REBUILD)
3580 failed++;
3581 }
3582
3583 return failed;
3584 }
3585
3586 static int is_resyncing(struct imsm_dev *dev)
3587 {
3588 struct imsm_map *migr_map;
3589
3590 if (!dev->vol.migr_state)
3591 return 0;
3592
3593 if (migr_type(dev) == MIGR_INIT ||
3594 migr_type(dev) == MIGR_REPAIR)
3595 return 1;
3596
3597 migr_map = get_imsm_map(dev, 1);
3598
3599 if (migr_map->map_state == IMSM_T_STATE_NORMAL)
3600 return 1;
3601 else
3602 return 0;
3603 }
3604
3605 static int is_rebuilding(struct imsm_dev *dev)
3606 {
3607 struct imsm_map *migr_map;
3608
3609 if (!dev->vol.migr_state)
3610 return 0;
3611
3612 if (migr_type(dev) != MIGR_REBUILD)
3613 return 0;
3614
3615 migr_map = get_imsm_map(dev, 1);
3616
3617 if (migr_map->map_state == IMSM_T_STATE_DEGRADED)
3618 return 1;
3619 else
3620 return 0;
3621 }
3622
3623 /* return true if we recorded new information */
3624 static int mark_failure(struct imsm_dev *dev, struct imsm_disk *disk, int idx)
3625 {
3626 __u32 ord;
3627 int slot;
3628 struct imsm_map *map;
3629
3630 /* new failures are always set in map[0] */
3631 map = get_imsm_map(dev, 0);
3632
3633 slot = get_imsm_disk_slot(map, idx);
3634 if (slot < 0)
3635 return 0;
3636
3637 ord = __le32_to_cpu(map->disk_ord_tbl[slot]);
3638 if ((disk->status & FAILED_DISK) && (ord & IMSM_ORD_REBUILD))
3639 return 0;
3640
3641 disk->status |= FAILED_DISK;
3642 set_imsm_ord_tbl_ent(map, slot, idx | IMSM_ORD_REBUILD);
3643 if (~map->failed_disk_num == 0)
3644 map->failed_disk_num = slot;
3645 return 1;
3646 }
3647
3648 static void mark_missing(struct imsm_dev *dev, struct imsm_disk *disk, int idx)
3649 {
3650 mark_failure(dev, disk, idx);
3651
3652 if (disk->scsi_id == __cpu_to_le32(~(__u32)0))
3653 return;
3654
3655 disk->scsi_id = __cpu_to_le32(~(__u32)0);
3656 memmove(&disk->serial[0], &disk->serial[1], MAX_RAID_SERIAL_LEN - 1);
3657 }
3658
3659 /* Handle dirty -> clean transititions and resync. Degraded and rebuild
3660 * states are handled in imsm_set_disk() with one exception, when a
3661 * resync is stopped due to a new failure this routine will set the
3662 * 'degraded' state for the array.
3663 */
3664 static int imsm_set_array_state(struct active_array *a, int consistent)
3665 {
3666 int inst = a->info.container_member;
3667 struct intel_super *super = a->container->sb;
3668 struct imsm_dev *dev = get_imsm_dev(super, inst);
3669 struct imsm_map *map = get_imsm_map(dev, 0);
3670 int failed = imsm_count_failed(super, dev);
3671 __u8 map_state = imsm_check_degraded(super, dev, failed);
3672
3673 /* before we activate this array handle any missing disks */
3674 if (consistent == 2 && super->missing) {
3675 struct dl *dl;
3676
3677 dprintf("imsm: mark missing\n");
3678 end_migration(dev, map_state);
3679 for (dl = super->missing; dl; dl = dl->next)
3680 mark_missing(dev, &dl->disk, dl->index);
3681 super->updates_pending++;
3682 }
3683
3684 if (consistent == 2 &&
3685 (!is_resync_complete(a) ||
3686 map_state != IMSM_T_STATE_NORMAL ||
3687 dev->vol.migr_state))
3688 consistent = 0;
3689
3690 if (is_resync_complete(a)) {
3691 /* complete intialization / resync,
3692 * recovery and interrupted recovery is completed in
3693 * ->set_disk
3694 */
3695 if (is_resyncing(dev)) {
3696 dprintf("imsm: mark resync done\n");
3697 end_migration(dev, map_state);
3698 super->updates_pending++;
3699 }
3700 } else if (!is_resyncing(dev) && !failed) {
3701 /* mark the start of the init process if nothing is failed */
3702 dprintf("imsm: mark resync start (%llu)\n", a->resync_start);
3703 if (map->map_state == IMSM_T_STATE_UNINITIALIZED)
3704 migrate(dev, IMSM_T_STATE_NORMAL, MIGR_INIT);
3705 else
3706 migrate(dev, IMSM_T_STATE_NORMAL, MIGR_REPAIR);
3707 super->updates_pending++;
3708 }
3709
3710 /* FIXME check if we can update curr_migr_unit from resync_start */
3711
3712 /* mark dirty / clean */
3713 if (dev->vol.dirty != !consistent) {
3714 dprintf("imsm: mark '%s' (%llu)\n",
3715 consistent ? "clean" : "dirty", a->resync_start);
3716 if (consistent)
3717 dev->vol.dirty = 0;
3718 else
3719 dev->vol.dirty = 1;
3720 super->updates_pending++;
3721 }
3722 return consistent;
3723 }
3724
3725 static void imsm_set_disk(struct active_array *a, int n, int state)
3726 {
3727 int inst = a->info.container_member;
3728 struct intel_super *super = a->container->sb;
3729 struct imsm_dev *dev = get_imsm_dev(super, inst);
3730 struct imsm_map *map = get_imsm_map(dev, 0);
3731 struct imsm_disk *disk;
3732 int failed;
3733 __u32 ord;
3734 __u8 map_state;
3735
3736 if (n > map->num_members)
3737 fprintf(stderr, "imsm: set_disk %d out of range 0..%d\n",
3738 n, map->num_members - 1);
3739
3740 if (n < 0)
3741 return;
3742
3743 dprintf("imsm: set_disk %d:%x\n", n, state);
3744
3745 ord = get_imsm_ord_tbl_ent(dev, n);
3746 disk = get_imsm_disk(super, ord_to_idx(ord));
3747
3748 /* check for new failures */
3749 if (state & DS_FAULTY) {
3750 if (mark_failure(dev, disk, ord_to_idx(ord)))
3751 super->updates_pending++;
3752 }
3753
3754 /* check if in_sync */
3755 if (state & DS_INSYNC && ord & IMSM_ORD_REBUILD && is_rebuilding(dev)) {
3756 struct imsm_map *migr_map = get_imsm_map(dev, 1);
3757
3758 set_imsm_ord_tbl_ent(migr_map, n, ord_to_idx(ord));
3759 super->updates_pending++;
3760 }
3761
3762 failed = imsm_count_failed(super, dev);
3763 map_state = imsm_check_degraded(super, dev, failed);
3764
3765 /* check if recovery complete, newly degraded, or failed */
3766 if (map_state == IMSM_T_STATE_NORMAL && is_rebuilding(dev)) {
3767 end_migration(dev, map_state);
3768 map = get_imsm_map(dev, 0);
3769 map->failed_disk_num = ~0;
3770 super->updates_pending++;
3771 } else if (map_state == IMSM_T_STATE_DEGRADED &&
3772 map->map_state != map_state &&
3773 !dev->vol.migr_state) {
3774 dprintf("imsm: mark degraded\n");
3775 map->map_state = map_state;
3776 super->updates_pending++;
3777 } else if (map_state == IMSM_T_STATE_FAILED &&
3778 map->map_state != map_state) {
3779 dprintf("imsm: mark failed\n");
3780 end_migration(dev, map_state);
3781 super->updates_pending++;
3782 }
3783 }
3784
3785 static int store_imsm_mpb(int fd, struct intel_super *super)
3786 {
3787 struct imsm_super *mpb = super->anchor;
3788 __u32 mpb_size = __le32_to_cpu(mpb->mpb_size);
3789 unsigned long long dsize;
3790 unsigned long long sectors;
3791
3792 get_dev_size(fd, NULL, &dsize);
3793
3794 if (mpb_size > 512) {
3795 /* -1 to account for anchor */
3796 sectors = mpb_sectors(mpb) - 1;
3797
3798 /* write the extended mpb to the sectors preceeding the anchor */
3799 if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0)
3800 return 1;
3801
3802 if (write(fd, super->buf + 512, 512 * sectors) != 512 * sectors)
3803 return 1;
3804 }
3805
3806 /* first block is stored on second to last sector of the disk */
3807 if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
3808 return 1;
3809
3810 if (write(fd, super->buf, 512) != 512)
3811 return 1;
3812
3813 return 0;
3814 }
3815
3816 static void imsm_sync_metadata(struct supertype *container)
3817 {
3818 struct intel_super *super = container->sb;
3819
3820 if (!super->updates_pending)
3821 return;
3822
3823 write_super_imsm(super, 0);
3824
3825 super->updates_pending = 0;
3826 }
3827
3828 static struct dl *imsm_readd(struct intel_super *super, int idx, struct active_array *a)
3829 {
3830 struct imsm_dev *dev = get_imsm_dev(super, a->info.container_member);
3831 int i = get_imsm_disk_idx(dev, idx);
3832 struct dl *dl;
3833
3834 for (dl = super->disks; dl; dl = dl->next)
3835 if (dl->index == i)
3836 break;
3837
3838 if (dl && dl->disk.status & FAILED_DISK)
3839 dl = NULL;
3840
3841 if (dl)
3842 dprintf("%s: found %x:%x\n", __func__, dl->major, dl->minor);
3843
3844 return dl;
3845 }
3846
3847 static struct dl *imsm_add_spare(struct intel_super *super, int slot,
3848 struct active_array *a, int activate_new)
3849 {
3850 struct imsm_dev *dev = get_imsm_dev(super, a->info.container_member);
3851 int idx = get_imsm_disk_idx(dev, slot);
3852 struct imsm_super *mpb = super->anchor;
3853 struct imsm_map *map;
3854 unsigned long long esize;
3855 unsigned long long pos;
3856 struct mdinfo *d;
3857 struct extent *ex;
3858 int i, j;
3859 int found;
3860 __u32 array_start;
3861 __u32 blocks;
3862 struct dl *dl;
3863
3864 for (dl = super->disks; dl; dl = dl->next) {
3865 /* If in this array, skip */
3866 for (d = a->info.devs ; d ; d = d->next)
3867 if (d->state_fd >= 0 &&
3868 d->disk.major == dl->major &&
3869 d->disk.minor == dl->minor) {
3870 dprintf("%x:%x already in array\n", dl->major, dl->minor);
3871 break;
3872 }
3873 if (d)
3874 continue;
3875
3876 /* skip in use or failed drives */
3877 if (dl->disk.status & FAILED_DISK || idx == dl->index ||
3878 dl->index == -2) {
3879 dprintf("%x:%x status (failed: %d index: %d)\n",
3880 dl->major, dl->minor,
3881 (dl->disk.status & FAILED_DISK) == FAILED_DISK, idx);
3882 continue;
3883 }
3884
3885 /* skip pure spares when we are looking for partially
3886 * assimilated drives
3887 */
3888 if (dl->index == -1 && !activate_new)
3889 continue;
3890
3891 /* Does this unused device have the requisite free space?
3892 * It needs to be able to cover all member volumes
3893 */
3894 ex = get_extents(super, dl);
3895 if (!ex) {
3896 dprintf("cannot get extents\n");
3897 continue;
3898 }
3899 for (i = 0; i < mpb->num_raid_devs; i++) {
3900 dev = get_imsm_dev(super, i);
3901 map = get_imsm_map(dev, 0);
3902
3903 /* check if this disk is already a member of
3904 * this array
3905 */
3906 if (get_imsm_disk_slot(map, dl->index) >= 0)
3907 continue;
3908
3909 found = 0;
3910 j = 0;
3911 pos = 0;
3912 array_start = __le32_to_cpu(map->pba_of_lba0);
3913 blocks = __le32_to_cpu(map->blocks_per_member);
3914
3915 do {
3916 /* check that we can start at pba_of_lba0 with
3917 * blocks_per_member of space
3918 */
3919 esize = ex[j].start - pos;
3920 if (array_start >= pos &&
3921 array_start + blocks < ex[j].start) {
3922 found = 1;
3923 break;
3924 }
3925 pos = ex[j].start + ex[j].size;
3926 j++;
3927 } while (ex[j-1].size);
3928
3929 if (!found)
3930 break;
3931 }
3932
3933 free(ex);
3934 if (i < mpb->num_raid_devs) {
3935 dprintf("%x:%x does not have %u at %u\n",
3936 dl->major, dl->minor,
3937 blocks, array_start);
3938 /* No room */
3939 continue;
3940 }
3941 return dl;
3942 }
3943
3944 return dl;
3945 }
3946
3947 static struct mdinfo *imsm_activate_spare(struct active_array *a,
3948 struct metadata_update **updates)
3949 {
3950 /**
3951 * Find a device with unused free space and use it to replace a
3952 * failed/vacant region in an array. We replace failed regions one a
3953 * array at a time. The result is that a new spare disk will be added
3954 * to the first failed array and after the monitor has finished
3955 * propagating failures the remainder will be consumed.
3956 *
3957 * FIXME add a capability for mdmon to request spares from another
3958 * container.
3959 */
3960
3961 struct intel_super *super = a->container->sb;
3962 int inst = a->info.container_member;
3963 struct imsm_dev *dev = get_imsm_dev(super, inst);
3964 struct imsm_map *map = get_imsm_map(dev, 0);
3965 int failed = a->info.array.raid_disks;
3966 struct mdinfo *rv = NULL;
3967 struct mdinfo *d;
3968 struct mdinfo *di;
3969 struct metadata_update *mu;
3970 struct dl *dl;
3971 struct imsm_update_activate_spare *u;
3972 int num_spares = 0;
3973 int i;
3974
3975 for (d = a->info.devs ; d ; d = d->next) {
3976 if ((d->curr_state & DS_FAULTY) &&
3977 d->state_fd >= 0)
3978 /* wait for Removal to happen */
3979 return NULL;
3980 if (d->state_fd >= 0)
3981 failed--;
3982 }
3983
3984 dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n",
3985 inst, failed, a->info.array.raid_disks, a->info.array.level);
3986 if (imsm_check_degraded(super, dev, failed) != IMSM_T_STATE_DEGRADED)
3987 return NULL;
3988
3989 /* For each slot, if it is not working, find a spare */
3990 for (i = 0; i < a->info.array.raid_disks; i++) {
3991 for (d = a->info.devs ; d ; d = d->next)
3992 if (d->disk.raid_disk == i)
3993 break;
3994 dprintf("found %d: %p %x\n", i, d, d?d->curr_state:0);
3995 if (d && (d->state_fd >= 0))
3996 continue;
3997
3998 /*
3999 * OK, this device needs recovery. Try to re-add the
4000 * previous occupant of this slot, if this fails see if
4001 * we can continue the assimilation of a spare that was
4002 * partially assimilated, finally try to activate a new
4003 * spare.
4004 */
4005 dl = imsm_readd(super, i, a);
4006 if (!dl)
4007 dl = imsm_add_spare(super, i, a, 0);
4008 if (!dl)
4009 dl = imsm_add_spare(super, i, a, 1);
4010 if (!dl)
4011 continue;
4012
4013 /* found a usable disk with enough space */
4014 di = malloc(sizeof(*di));
4015 if (!di)
4016 continue;
4017 memset(di, 0, sizeof(*di));
4018
4019 /* dl->index will be -1 in the case we are activating a
4020 * pristine spare. imsm_process_update() will create a
4021 * new index in this case. Once a disk is found to be
4022 * failed in all member arrays it is kicked from the
4023 * metadata
4024 */
4025 di->disk.number = dl->index;
4026
4027 /* (ab)use di->devs to store a pointer to the device
4028 * we chose
4029 */
4030 di->devs = (struct mdinfo *) dl;
4031
4032 di->disk.raid_disk = i;
4033 di->disk.major = dl->major;
4034 di->disk.minor = dl->minor;
4035 di->disk.state = 0;
4036 di->data_offset = __le32_to_cpu(map->pba_of_lba0);
4037 di->component_size = a->info.component_size;
4038 di->container_member = inst;
4039 di->next = rv;
4040 rv = di;
4041 num_spares++;
4042 dprintf("%x:%x to be %d at %llu\n", dl->major, dl->minor,
4043 i, di->data_offset);
4044
4045 break;
4046 }
4047
4048 if (!rv)
4049 /* No spares found */
4050 return rv;
4051 /* Now 'rv' has a list of devices to return.
4052 * Create a metadata_update record to update the
4053 * disk_ord_tbl for the array
4054 */
4055 mu = malloc(sizeof(*mu));
4056 if (mu) {
4057 mu->buf = malloc(sizeof(struct imsm_update_activate_spare) * num_spares);
4058 if (mu->buf == NULL) {
4059 free(mu);
4060 mu = NULL;
4061 }
4062 }
4063 if (!mu) {
4064 while (rv) {
4065 struct mdinfo *n = rv->next;
4066
4067 free(rv);
4068 rv = n;
4069 }
4070 return NULL;
4071 }
4072
4073 mu->space = NULL;
4074 mu->len = sizeof(struct imsm_update_activate_spare) * num_spares;
4075 mu->next = *updates;
4076 u = (struct imsm_update_activate_spare *) mu->buf;
4077
4078 for (di = rv ; di ; di = di->next) {
4079 u->type = update_activate_spare;
4080 u->dl = (struct dl *) di->devs;
4081 di->devs = NULL;
4082 u->slot = di->disk.raid_disk;
4083 u->array = inst;
4084 u->next = u + 1;
4085 u++;
4086 }
4087 (u-1)->next = NULL;
4088 *updates = mu;
4089
4090 return rv;
4091 }
4092
4093 static int disks_overlap(struct intel_super *super, int idx, struct imsm_update_create_array *u)
4094 {
4095 struct imsm_dev *dev = get_imsm_dev(super, idx);
4096 struct imsm_map *map = get_imsm_map(dev, 0);
4097 struct imsm_map *new_map = get_imsm_map(&u->dev, 0);
4098 struct disk_info *inf = get_disk_info(u);
4099 struct imsm_disk *disk;
4100 int i;
4101 int j;
4102
4103 for (i = 0; i < map->num_members; i++) {
4104 disk = get_imsm_disk(super, get_imsm_disk_idx(dev, i));
4105 for (j = 0; j < new_map->num_members; j++)
4106 if (serialcmp(disk->serial, inf[j].serial) == 0)
4107 return 1;
4108 }
4109
4110 return 0;
4111 }
4112
4113 static void imsm_delete(struct intel_super *super, struct dl **dlp, int index);
4114
4115 static void imsm_process_update(struct supertype *st,
4116 struct metadata_update *update)
4117 {
4118 /**
4119 * crack open the metadata_update envelope to find the update record
4120 * update can be one of:
4121 * update_activate_spare - a spare device has replaced a failed
4122 * device in an array, update the disk_ord_tbl. If this disk is
4123 * present in all member arrays then also clear the SPARE_DISK
4124 * flag
4125 */
4126 struct intel_super *super = st->sb;
4127 struct imsm_super *mpb;
4128 enum imsm_update_type type = *(enum imsm_update_type *) update->buf;
4129
4130 /* update requires a larger buf but the allocation failed */
4131 if (super->next_len && !super->next_buf) {
4132 super->next_len = 0;
4133 return;
4134 }
4135
4136 if (super->next_buf) {
4137 memcpy(super->next_buf, super->buf, super->len);
4138 free(super->buf);
4139 super->len = super->next_len;
4140 super->buf = super->next_buf;
4141
4142 super->next_len = 0;
4143 super->next_buf = NULL;
4144 }
4145
4146 mpb = super->anchor;
4147
4148 switch (type) {
4149 case update_activate_spare: {
4150 struct imsm_update_activate_spare *u = (void *) update->buf;
4151 struct imsm_dev *dev = get_imsm_dev(super, u->array);
4152 struct imsm_map *map = get_imsm_map(dev, 0);
4153 struct imsm_map *migr_map;
4154 struct active_array *a;
4155 struct imsm_disk *disk;
4156 __u8 to_state;
4157 struct dl *dl;
4158 unsigned int found;
4159 int failed;
4160 int victim = get_imsm_disk_idx(dev, u->slot);
4161 int i;
4162
4163 for (dl = super->disks; dl; dl = dl->next)
4164 if (dl == u->dl)
4165 break;
4166
4167 if (!dl) {
4168 fprintf(stderr, "error: imsm_activate_spare passed "
4169 "an unknown disk (index: %d)\n",
4170 u->dl->index);
4171 return;
4172 }
4173
4174 super->updates_pending++;
4175
4176 /* count failures (excluding rebuilds and the victim)
4177 * to determine map[0] state
4178 */
4179 failed = 0;
4180 for (i = 0; i < map->num_members; i++) {
4181 if (i == u->slot)
4182 continue;
4183 disk = get_imsm_disk(super, get_imsm_disk_idx(dev, i));
4184 if (!disk || disk->status & FAILED_DISK)
4185 failed++;
4186 }
4187
4188 /* adding a pristine spare, assign a new index */
4189 if (dl->index < 0) {
4190 dl->index = super->anchor->num_disks;
4191 super->anchor->num_disks++;
4192 }
4193 disk = &dl->disk;
4194 disk->status |= CONFIGURED_DISK;
4195 disk->status &= ~SPARE_DISK;
4196
4197 /* mark rebuild */
4198 to_state = imsm_check_degraded(super, dev, failed);
4199 map->map_state = IMSM_T_STATE_DEGRADED;
4200 migrate(dev, to_state, MIGR_REBUILD);
4201 migr_map = get_imsm_map(dev, 1);
4202 set_imsm_ord_tbl_ent(map, u->slot, dl->index);
4203 set_imsm_ord_tbl_ent(migr_map, u->slot, dl->index | IMSM_ORD_REBUILD);
4204
4205 /* count arrays using the victim in the metadata */
4206 found = 0;
4207 for (a = st->arrays; a ; a = a->next) {
4208 dev = get_imsm_dev(super, a->info.container_member);
4209 map = get_imsm_map(dev, 0);
4210
4211 if (get_imsm_disk_slot(map, victim) >= 0)
4212 found++;
4213 }
4214
4215 /* delete the victim if it is no longer being
4216 * utilized anywhere
4217 */
4218 if (!found) {
4219 struct dl **dlp;
4220
4221 /* We know that 'manager' isn't touching anything,
4222 * so it is safe to delete
4223 */
4224 for (dlp = &super->disks; *dlp; dlp = &(*dlp)->next)
4225 if ((*dlp)->index == victim)
4226 break;
4227
4228 /* victim may be on the missing list */
4229 if (!*dlp)
4230 for (dlp = &super->missing; *dlp; dlp = &(*dlp)->next)
4231 if ((*dlp)->index == victim)
4232 break;
4233 imsm_delete(super, dlp, victim);
4234 }
4235 break;
4236 }
4237 case update_create_array: {
4238 /* someone wants to create a new array, we need to be aware of
4239 * a few races/collisions:
4240 * 1/ 'Create' called by two separate instances of mdadm
4241 * 2/ 'Create' versus 'activate_spare': mdadm has chosen
4242 * devices that have since been assimilated via
4243 * activate_spare.
4244 * In the event this update can not be carried out mdadm will
4245 * (FIX ME) notice that its update did not take hold.
4246 */
4247 struct imsm_update_create_array *u = (void *) update->buf;
4248 struct intel_dev *dv;
4249 struct imsm_dev *dev;
4250 struct imsm_map *map, *new_map;
4251 unsigned long long start, end;
4252 unsigned long long new_start, new_end;
4253 int i;
4254 struct disk_info *inf;
4255 struct dl *dl;
4256
4257 /* handle racing creates: first come first serve */
4258 if (u->dev_idx < mpb->num_raid_devs) {
4259 dprintf("%s: subarray %d already defined\n",
4260 __func__, u->dev_idx);
4261 goto create_error;
4262 }
4263
4264 /* check update is next in sequence */
4265 if (u->dev_idx != mpb->num_raid_devs) {
4266 dprintf("%s: can not create array %d expected index %d\n",
4267 __func__, u->dev_idx, mpb->num_raid_devs);
4268 goto create_error;
4269 }
4270
4271 new_map = get_imsm_map(&u->dev, 0);
4272 new_start = __le32_to_cpu(new_map->pba_of_lba0);
4273 new_end = new_start + __le32_to_cpu(new_map->blocks_per_member);
4274 inf = get_disk_info(u);
4275
4276 /* handle activate_spare versus create race:
4277 * check to make sure that overlapping arrays do not include
4278 * overalpping disks
4279 */
4280 for (i = 0; i < mpb->num_raid_devs; i++) {
4281 dev = get_imsm_dev(super, i);
4282 map = get_imsm_map(dev, 0);
4283 start = __le32_to_cpu(map->pba_of_lba0);
4284 end = start + __le32_to_cpu(map->blocks_per_member);
4285 if ((new_start >= start && new_start <= end) ||
4286 (start >= new_start && start <= new_end))
4287 /* overlap */;
4288 else
4289 continue;
4290
4291 if (disks_overlap(super, i, u)) {
4292 dprintf("%s: arrays overlap\n", __func__);
4293 goto create_error;
4294 }
4295 }
4296
4297 /* check that prepare update was successful */
4298 if (!update->space) {
4299 dprintf("%s: prepare update failed\n", __func__);
4300 goto create_error;
4301 }
4302
4303 /* check that all disks are still active before committing
4304 * changes. FIXME: could we instead handle this by creating a
4305 * degraded array? That's probably not what the user expects,
4306 * so better to drop this update on the floor.
4307 */
4308 for (i = 0; i < new_map->num_members; i++) {
4309 dl = serial_to_dl(inf[i].serial, super);
4310 if (!dl) {
4311 dprintf("%s: disk disappeared\n", __func__);
4312 goto create_error;
4313 }
4314 }
4315
4316 super->updates_pending++;
4317
4318 /* convert spares to members and fixup ord_tbl */
4319 for (i = 0; i < new_map->num_members; i++) {
4320 dl = serial_to_dl(inf[i].serial, super);
4321 if (dl->index == -1) {
4322 dl->index = mpb->num_disks;
4323 mpb->num_disks++;
4324 dl->disk.status |= CONFIGURED_DISK;
4325 dl->disk.status &= ~SPARE_DISK;
4326 }
4327 set_imsm_ord_tbl_ent(new_map, i, dl->index);
4328 }
4329
4330 dv = update->space;
4331 dev = dv->dev;
4332 update->space = NULL;
4333 imsm_copy_dev(dev, &u->dev);
4334 dv->index = u->dev_idx;
4335 dv->next = super->devlist;
4336 super->devlist = dv;
4337 mpb->num_raid_devs++;
4338
4339 imsm_update_version_info(super);
4340 break;
4341 create_error:
4342 /* mdmon knows how to release update->space, but not
4343 * ((struct intel_dev *) update->space)->dev
4344 */
4345 if (update->space) {
4346 dv = update->space;
4347 free(dv->dev);
4348 }
4349 break;
4350 }
4351 case update_add_disk:
4352
4353 /* we may be able to repair some arrays if disks are
4354 * being added */
4355 if (super->add) {
4356 struct active_array *a;
4357
4358 super->updates_pending++;
4359 for (a = st->arrays; a; a = a->next)
4360 a->check_degraded = 1;
4361 }
4362 /* add some spares to the metadata */
4363 while (super->add) {
4364 struct dl *al;
4365
4366 al = super->add;
4367 super->add = al->next;
4368 al->next = super->disks;
4369 super->disks = al;
4370 dprintf("%s: added %x:%x\n",
4371 __func__, al->major, al->minor);
4372 }
4373
4374 break;
4375 }
4376 }
4377
4378 static void imsm_prepare_update(struct supertype *st,
4379 struct metadata_update *update)
4380 {
4381 /**
4382 * Allocate space to hold new disk entries, raid-device entries or a new
4383 * mpb if necessary. The manager synchronously waits for updates to
4384 * complete in the monitor, so new mpb buffers allocated here can be
4385 * integrated by the monitor thread without worrying about live pointers
4386 * in the manager thread.
4387 */
4388 enum imsm_update_type type = *(enum imsm_update_type *) update->buf;
4389 struct intel_super *super = st->sb;
4390 struct imsm_super *mpb = super->anchor;
4391 size_t buf_len;
4392 size_t len = 0;
4393
4394 switch (type) {
4395 case update_create_array: {
4396 struct imsm_update_create_array *u = (void *) update->buf;
4397 struct intel_dev *dv;
4398 struct imsm_dev *dev = &u->dev;
4399 struct imsm_map *map = get_imsm_map(dev, 0);
4400 struct dl *dl;
4401 struct disk_info *inf;
4402 int i;
4403 int activate = 0;
4404
4405 inf = get_disk_info(u);
4406 len = sizeof_imsm_dev(dev, 1);
4407 /* allocate a new super->devlist entry */
4408 dv = malloc(sizeof(*dv));
4409 if (dv) {
4410 dv->dev = malloc(len);
4411 if (dv->dev)
4412 update->space = dv;
4413 else {
4414 free(dv);
4415 update->space = NULL;
4416 }
4417 }
4418
4419 /* count how many spares will be converted to members */
4420 for (i = 0; i < map->num_members; i++) {
4421 dl = serial_to_dl(inf[i].serial, super);
4422 if (!dl) {
4423 /* hmm maybe it failed?, nothing we can do about
4424 * it here
4425 */
4426 continue;
4427 }
4428 if (count_memberships(dl, super) == 0)
4429 activate++;
4430 }
4431 len += activate * sizeof(struct imsm_disk);
4432 break;
4433 default:
4434 break;
4435 }
4436 }
4437
4438 /* check if we need a larger metadata buffer */
4439 if (super->next_buf)
4440 buf_len = super->next_len;
4441 else
4442 buf_len = super->len;
4443
4444 if (__le32_to_cpu(mpb->mpb_size) + len > buf_len) {
4445 /* ok we need a larger buf than what is currently allocated
4446 * if this allocation fails process_update will notice that
4447 * ->next_len is set and ->next_buf is NULL
4448 */
4449 buf_len = ROUND_UP(__le32_to_cpu(mpb->mpb_size) + len, 512);
4450 if (super->next_buf)
4451 free(super->next_buf);
4452
4453 super->next_len = buf_len;
4454 if (posix_memalign(&super->next_buf, 512, buf_len) == 0)
4455 memset(super->next_buf, 0, buf_len);
4456 else
4457 super->next_buf = NULL;
4458 }
4459 }
4460
4461 /* must be called while manager is quiesced */
4462 static void imsm_delete(struct intel_super *super, struct dl **dlp, int index)
4463 {
4464 struct imsm_super *mpb = super->anchor;
4465 struct dl *iter;
4466 struct imsm_dev *dev;
4467 struct imsm_map *map;
4468 int i, j, num_members;
4469 __u32 ord;
4470
4471 dprintf("%s: deleting device[%d] from imsm_super\n",
4472 __func__, index);
4473
4474 /* shift all indexes down one */
4475 for (iter = super->disks; iter; iter = iter->next)
4476 if (iter->index > index)
4477 iter->index--;
4478 for (iter = super->missing; iter; iter = iter->next)
4479 if (iter->index > index)
4480 iter->index--;
4481
4482 for (i = 0; i < mpb->num_raid_devs; i++) {
4483 dev = get_imsm_dev(super, i);
4484 map = get_imsm_map(dev, 0);
4485 num_members = map->num_members;
4486 for (j = 0; j < num_members; j++) {
4487 /* update ord entries being careful not to propagate
4488 * ord-flags to the first map
4489 */
4490 ord = get_imsm_ord_tbl_ent(dev, j);
4491
4492 if (ord_to_idx(ord) <= index)
4493 continue;
4494
4495 map = get_imsm_map(dev, 0);
4496 set_imsm_ord_tbl_ent(map, j, ord_to_idx(ord - 1));
4497 map = get_imsm_map(dev, 1);
4498 if (map)
4499 set_imsm_ord_tbl_ent(map, j, ord - 1);
4500 }
4501 }
4502
4503 mpb->num_disks--;
4504 super->updates_pending++;
4505 if (*dlp) {
4506 struct dl *dl = *dlp;
4507
4508 *dlp = (*dlp)->next;
4509 __free_imsm_disk(dl);
4510 }
4511 }
4512 #endif /* MDASSEMBLE */
4513
4514 struct superswitch super_imsm = {
4515 #ifndef MDASSEMBLE
4516 .examine_super = examine_super_imsm,
4517 .brief_examine_super = brief_examine_super_imsm,
4518 .export_examine_super = export_examine_super_imsm,
4519 .detail_super = detail_super_imsm,
4520 .brief_detail_super = brief_detail_super_imsm,
4521 .write_init_super = write_init_super_imsm,
4522 .validate_geometry = validate_geometry_imsm,
4523 .add_to_super = add_to_super_imsm,
4524 .detail_platform = detail_platform_imsm,
4525 #endif
4526 .match_home = match_home_imsm,
4527 .uuid_from_super= uuid_from_super_imsm,
4528 .getinfo_super = getinfo_super_imsm,
4529 .update_super = update_super_imsm,
4530
4531 .avail_size = avail_size_imsm,
4532
4533 .compare_super = compare_super_imsm,
4534
4535 .load_super = load_super_imsm,
4536 .init_super = init_super_imsm,
4537 .store_super = store_zero_imsm,
4538 .free_super = free_super_imsm,
4539 .match_metadata_desc = match_metadata_desc_imsm,
4540 .container_content = container_content_imsm,
4541 .default_layout = imsm_level_to_layout,
4542
4543 .external = 1,
4544 .name = "imsm",
4545
4546 #ifndef MDASSEMBLE
4547 /* for mdmon */
4548 .open_new = imsm_open_new,
4549 .load_super = load_super_imsm,
4550 .set_array_state= imsm_set_array_state,
4551 .set_disk = imsm_set_disk,
4552 .sync_metadata = imsm_sync_metadata,
4553 .activate_spare = imsm_activate_spare,
4554 .process_update = imsm_process_update,
4555 .prepare_update = imsm_prepare_update,
4556 #endif /* MDASSEMBLE */
4557 };
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