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