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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / fs / ceph / osdmap.c
blobe31f118f1392988351257d2385863c37228bc7df
1
2 #include "ceph_debug.h"
3
4 #include <linux/slab.h>
5 #include <asm/div64.h>
6
7 #include "super.h"
8 #include "osdmap.h"
9 #include "crush/hash.h"
10 #include "crush/mapper.h"
11 #include "decode.h"
12
13 char *ceph_osdmap_state_str(char *str, int len, int state)
14 {
15 int flag = 0;
16
17 if (!len)
18 goto done;
19
20 *str = '\0';
21 if (state) {
22 if (state & CEPH_OSD_EXISTS) {
23 snprintf(str, len, "exists");
24 flag = 1;
25 }
26 if (state & CEPH_OSD_UP) {
27 snprintf(str, len, "%s%s%s", str, (flag ? ", " : ""),
28 "up");
29 flag = 1;
30 }
31 } else {
32 snprintf(str, len, "doesn't exist");
33 }
34 done:
35 return str;
36 }
37
38 /* maps */
39
40 static int calc_bits_of(unsigned t)
41 {
42 int b = 0;
43 while (t) {
44 t = t >> 1;
45 b++;
46 }
47 return b;
48 }
49
50 /*
51 * the foo_mask is the smallest value 2^n-1 that is >= foo.
52 */
53 static void calc_pg_masks(struct ceph_pg_pool_info *pi)
54 {
55 pi->pg_num_mask = (1 << calc_bits_of(le32_to_cpu(pi->v.pg_num)-1)) - 1;
56 pi->pgp_num_mask =
57 (1 << calc_bits_of(le32_to_cpu(pi->v.pgp_num)-1)) - 1;
58 pi->lpg_num_mask =
59 (1 << calc_bits_of(le32_to_cpu(pi->v.lpg_num)-1)) - 1;
60 pi->lpgp_num_mask =
61 (1 << calc_bits_of(le32_to_cpu(pi->v.lpgp_num)-1)) - 1;
62 }
63
64 /*
65 * decode crush map
66 */
67 static int crush_decode_uniform_bucket(void **p, void *end,
68 struct crush_bucket_uniform *b)
69 {
70 dout("crush_decode_uniform_bucket %p to %p\n", *p, end);
71 ceph_decode_need(p, end, (1+b->h.size) * sizeof(u32), bad);
72 b->item_weight = ceph_decode_32(p);
73 return 0;
74 bad:
75 return -EINVAL;
76 }
77
78 static int crush_decode_list_bucket(void **p, void *end,
79 struct crush_bucket_list *b)
80 {
81 int j;
82 dout("crush_decode_list_bucket %p to %p\n", *p, end);
83 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
84 if (b->item_weights == NULL)
85 return -ENOMEM;
86 b->sum_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
87 if (b->sum_weights == NULL)
88 return -ENOMEM;
89 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
90 for (j = 0; j < b->h.size; j++) {
91 b->item_weights[j] = ceph_decode_32(p);
92 b->sum_weights[j] = ceph_decode_32(p);
93 }
94 return 0;
95 bad:
96 return -EINVAL;
97 }
98
99 static int crush_decode_tree_bucket(void **p, void *end,
100 struct crush_bucket_tree *b)
101 {
102 int j;
103 dout("crush_decode_tree_bucket %p to %p\n", *p, end);
104 ceph_decode_32_safe(p, end, b->num_nodes, bad);
105 b->node_weights = kcalloc(b->num_nodes, sizeof(u32), GFP_NOFS);
106 if (b->node_weights == NULL)
107 return -ENOMEM;
108 ceph_decode_need(p, end, b->num_nodes * sizeof(u32), bad);
109 for (j = 0; j < b->num_nodes; j++)
110 b->node_weights[j] = ceph_decode_32(p);
111 return 0;
112 bad:
113 return -EINVAL;
114 }
115
116 static int crush_decode_straw_bucket(void **p, void *end,
117 struct crush_bucket_straw *b)
118 {
119 int j;
120 dout("crush_decode_straw_bucket %p to %p\n", *p, end);
121 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
122 if (b->item_weights == NULL)
123 return -ENOMEM;
124 b->straws = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
125 if (b->straws == NULL)
126 return -ENOMEM;
127 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
128 for (j = 0; j < b->h.size; j++) {
129 b->item_weights[j] = ceph_decode_32(p);
130 b->straws[j] = ceph_decode_32(p);
131 }
132 return 0;
133 bad:
134 return -EINVAL;
135 }
136
137 static struct crush_map *crush_decode(void *pbyval, void *end)
138 {
139 struct crush_map *c;
140 int err = -EINVAL;
141 int i, j;
142 void **p = &pbyval;
143 void *start = pbyval;
144 u32 magic;
145
146 dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p));
147
148 c = kzalloc(sizeof(*c), GFP_NOFS);
149 if (c == NULL)
150 return ERR_PTR(-ENOMEM);
151
152 ceph_decode_need(p, end, 4*sizeof(u32), bad);
153 magic = ceph_decode_32(p);
154 if (magic != CRUSH_MAGIC) {
155 pr_err("crush_decode magic %x != current %x\n",
156 (unsigned)magic, (unsigned)CRUSH_MAGIC);
157 goto bad;
158 }
159 c->max_buckets = ceph_decode_32(p);
160 c->max_rules = ceph_decode_32(p);
161 c->max_devices = ceph_decode_32(p);
162
163 c->device_parents = kcalloc(c->max_devices, sizeof(u32), GFP_NOFS);
164 if (c->device_parents == NULL)
165 goto badmem;
166 c->bucket_parents = kcalloc(c->max_buckets, sizeof(u32), GFP_NOFS);
167 if (c->bucket_parents == NULL)
168 goto badmem;
169
170 c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
171 if (c->buckets == NULL)
172 goto badmem;
173 c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS);
174 if (c->rules == NULL)
175 goto badmem;
176
177 /* buckets */
178 for (i = 0; i < c->max_buckets; i++) {
179 int size = 0;
180 u32 alg;
181 struct crush_bucket *b;
182
183 ceph_decode_32_safe(p, end, alg, bad);
184 if (alg == 0) {
185 c->buckets[i] = NULL;
186 continue;
187 }
188 dout("crush_decode bucket %d off %x %p to %p\n",
189 i, (int)(*p-start), *p, end);
190
191 switch (alg) {
192 case CRUSH_BUCKET_UNIFORM:
193 size = sizeof(struct crush_bucket_uniform);
194 break;
195 case CRUSH_BUCKET_LIST:
196 size = sizeof(struct crush_bucket_list);
197 break;
198 case CRUSH_BUCKET_TREE:
199 size = sizeof(struct crush_bucket_tree);
200 break;
201 case CRUSH_BUCKET_STRAW:
202 size = sizeof(struct crush_bucket_straw);
203 break;
204 default:
205 err = -EINVAL;
206 goto bad;
207 }
208 BUG_ON(size == 0);
209 b = c->buckets[i] = kzalloc(size, GFP_NOFS);
210 if (b == NULL)
211 goto badmem;
212
213 ceph_decode_need(p, end, 4*sizeof(u32), bad);
214 b->id = ceph_decode_32(p);
215 b->type = ceph_decode_16(p);
216 b->alg = ceph_decode_8(p);
217 b->hash = ceph_decode_8(p);
218 b->weight = ceph_decode_32(p);
219 b->size = ceph_decode_32(p);
220
221 dout("crush_decode bucket size %d off %x %p to %p\n",
222 b->size, (int)(*p-start), *p, end);
223
224 b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS);
225 if (b->items == NULL)
226 goto badmem;
227 b->perm = kcalloc(b->size, sizeof(u32), GFP_NOFS);
228 if (b->perm == NULL)
229 goto badmem;
230 b->perm_n = 0;
231
232 ceph_decode_need(p, end, b->size*sizeof(u32), bad);
233 for (j = 0; j < b->size; j++)
234 b->items[j] = ceph_decode_32(p);
235
236 switch (b->alg) {
237 case CRUSH_BUCKET_UNIFORM:
238 err = crush_decode_uniform_bucket(p, end,
239 (struct crush_bucket_uniform *)b);
240 if (err < 0)
241 goto bad;
242 break;
243 case CRUSH_BUCKET_LIST:
244 err = crush_decode_list_bucket(p, end,
245 (struct crush_bucket_list *)b);
246 if (err < 0)
247 goto bad;
248 break;
249 case CRUSH_BUCKET_TREE:
250 err = crush_decode_tree_bucket(p, end,
251 (struct crush_bucket_tree *)b);
252 if (err < 0)
253 goto bad;
254 break;
255 case CRUSH_BUCKET_STRAW:
256 err = crush_decode_straw_bucket(p, end,
257 (struct crush_bucket_straw *)b);
258 if (err < 0)
259 goto bad;
260 break;
261 }
262 }
263
264 /* rules */
265 dout("rule vec is %p\n", c->rules);
266 for (i = 0; i < c->max_rules; i++) {
267 u32 yes;
268 struct crush_rule *r;
269
270 ceph_decode_32_safe(p, end, yes, bad);
271 if (!yes) {
272 dout("crush_decode NO rule %d off %x %p to %p\n",
273 i, (int)(*p-start), *p, end);
274 c->rules[i] = NULL;
275 continue;
276 }
277
278 dout("crush_decode rule %d off %x %p to %p\n",
279 i, (int)(*p-start), *p, end);
280
281 /* len */
282 ceph_decode_32_safe(p, end, yes, bad);
283 #if BITS_PER_LONG == 32
284 err = -EINVAL;
285 if (yes > ULONG_MAX / sizeof(struct crush_rule_step))
286 goto bad;
287 #endif
288 r = c->rules[i] = kmalloc(sizeof(*r) +
289 yes*sizeof(struct crush_rule_step),
290 GFP_NOFS);
291 if (r == NULL)
292 goto badmem;
293 dout(" rule %d is at %p\n", i, r);
294 r->len = yes;
295 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
296 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
297 for (j = 0; j < r->len; j++) {
298 r->steps[j].op = ceph_decode_32(p);
299 r->steps[j].arg1 = ceph_decode_32(p);
300 r->steps[j].arg2 = ceph_decode_32(p);
301 }
302 }
303
304 /* ignore trailing name maps. */
305
306 dout("crush_decode success\n");
307 return c;
308
309 badmem:
310 err = -ENOMEM;
311 bad:
312 dout("crush_decode fail %d\n", err);
313 crush_destroy(c);
314 return ERR_PTR(err);
315 }
316
317 /*
318 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
319 * to a set of osds)
320 */
321 static int pgid_cmp(struct ceph_pg l, struct ceph_pg r)
322 {
323 u64 a = *(u64 *)&l;
324 u64 b = *(u64 *)&r;
325
326 if (a < b)
327 return -1;
328 if (a > b)
329 return 1;
330 return 0;
331 }
332
333 static int __insert_pg_mapping(struct ceph_pg_mapping *new,
334 struct rb_root *root)
335 {
336 struct rb_node **p = &root->rb_node;
337 struct rb_node *parent = NULL;
338 struct ceph_pg_mapping *pg = NULL;
339 int c;
340
341 while (*p) {
342 parent = *p;
343 pg = rb_entry(parent, struct ceph_pg_mapping, node);
344 c = pgid_cmp(new->pgid, pg->pgid);
345 if (c < 0)
346 p = &(*p)->rb_left;
347 else if (c > 0)
348 p = &(*p)->rb_right;
349 else
350 return -EEXIST;
351 }
352
353 rb_link_node(&new->node, parent, p);
354 rb_insert_color(&new->node, root);
355 return 0;
356 }
357
358 static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
359 struct ceph_pg pgid)
360 {
361 struct rb_node *n = root->rb_node;
362 struct ceph_pg_mapping *pg;
363 int c;
364
365 while (n) {
366 pg = rb_entry(n, struct ceph_pg_mapping, node);
367 c = pgid_cmp(pgid, pg->pgid);
368 if (c < 0)
369 n = n->rb_left;
370 else if (c > 0)
371 n = n->rb_right;
372 else
373 return pg;
374 }
375 return NULL;
376 }
377
378 /*
379 * rbtree of pg pool info
380 */
381 static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
382 {
383 struct rb_node **p = &root->rb_node;
384 struct rb_node *parent = NULL;
385 struct ceph_pg_pool_info *pi = NULL;
386
387 while (*p) {
388 parent = *p;
389 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
390 if (new->id < pi->id)
391 p = &(*p)->rb_left;
392 else if (new->id > pi->id)
393 p = &(*p)->rb_right;
394 else
395 return -EEXIST;
396 }
397
398 rb_link_node(&new->node, parent, p);
399 rb_insert_color(&new->node, root);
400 return 0;
401 }
402
403 static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, int id)
404 {
405 struct ceph_pg_pool_info *pi;
406 struct rb_node *n = root->rb_node;
407
408 while (n) {
409 pi = rb_entry(n, struct ceph_pg_pool_info, node);
410 if (id < pi->id)
411 n = n->rb_left;
412 else if (id > pi->id)
413 n = n->rb_right;
414 else
415 return pi;
416 }
417 return NULL;
418 }
419
420 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
421 {
422 rb_erase(&pi->node, root);
423 kfree(pi->name);
424 kfree(pi);
425 }
426
427 static int __decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
428 {
429 unsigned n, m;
430
431 ceph_decode_copy(p, &pi->v, sizeof(pi->v));
432 calc_pg_masks(pi);
433
434 /* num_snaps * snap_info_t */
435 n = le32_to_cpu(pi->v.num_snaps);
436 while (n--) {
437 ceph_decode_need(p, end, sizeof(u64) + 1 + sizeof(u64) +
438 sizeof(struct ceph_timespec), bad);
439 *p += sizeof(u64) + /* key */
440 1 + sizeof(u64) + /* u8, snapid */
441 sizeof(struct ceph_timespec);
442 m = ceph_decode_32(p); /* snap name */
443 *p += m;
444 }
445
446 *p += le32_to_cpu(pi->v.num_removed_snap_intervals) * sizeof(u64) * 2;
447 return 0;
448
449 bad:
450 return -EINVAL;
451 }
452
453 static int __decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
454 {
455 struct ceph_pg_pool_info *pi;
456 u32 num, len, pool;
457
458 ceph_decode_32_safe(p, end, num, bad);
459 dout(" %d pool names\n", num);
460 while (num--) {
461 ceph_decode_32_safe(p, end, pool, bad);
462 ceph_decode_32_safe(p, end, len, bad);
463 dout(" pool %d len %d\n", pool, len);
464 pi = __lookup_pg_pool(&map->pg_pools, pool);
465 if (pi) {
466 kfree(pi->name);
467 pi->name = kmalloc(len + 1, GFP_NOFS);
468 if (pi->name) {
469 memcpy(pi->name, *p, len);
470 pi->name[len] = '\0';
471 dout(" name is %s\n", pi->name);
472 }
473 }
474 *p += len;
475 }
476 return 0;
477
478 bad:
479 return -EINVAL;
480 }
481
482 /*
483 * osd map
484 */
485 void ceph_osdmap_destroy(struct ceph_osdmap *map)
486 {
487 dout("osdmap_destroy %p\n", map);
488 if (map->crush)
489 crush_destroy(map->crush);
490 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
491 struct ceph_pg_mapping *pg =
492 rb_entry(rb_first(&map->pg_temp),
493 struct ceph_pg_mapping, node);
494 rb_erase(&pg->node, &map->pg_temp);
495 kfree(pg);
496 }
497 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
498 struct ceph_pg_pool_info *pi =
499 rb_entry(rb_first(&map->pg_pools),
500 struct ceph_pg_pool_info, node);
501 __remove_pg_pool(&map->pg_pools, pi);
502 }
503 kfree(map->osd_state);
504 kfree(map->osd_weight);
505 kfree(map->osd_addr);
506 kfree(map);
507 }
508
509 /*
510 * adjust max osd value. reallocate arrays.
511 */
512 static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
513 {
514 u8 *state;
515 struct ceph_entity_addr *addr;
516 u32 *weight;
517
518 state = kcalloc(max, sizeof(*state), GFP_NOFS);
519 addr = kcalloc(max, sizeof(*addr), GFP_NOFS);
520 weight = kcalloc(max, sizeof(*weight), GFP_NOFS);
521 if (state == NULL || addr == NULL || weight == NULL) {
522 kfree(state);
523 kfree(addr);
524 kfree(weight);
525 return -ENOMEM;
526 }
527
528 /* copy old? */
529 if (map->osd_state) {
530 memcpy(state, map->osd_state, map->max_osd*sizeof(*state));
531 memcpy(addr, map->osd_addr, map->max_osd*sizeof(*addr));
532 memcpy(weight, map->osd_weight, map->max_osd*sizeof(*weight));
533 kfree(map->osd_state);
534 kfree(map->osd_addr);
535 kfree(map->osd_weight);
536 }
537
538 map->osd_state = state;
539 map->osd_weight = weight;
540 map->osd_addr = addr;
541 map->max_osd = max;
542 return 0;
543 }
544
545 /*
546 * decode a full map.
547 */
548 struct ceph_osdmap *osdmap_decode(void **p, void *end)
549 {
550 struct ceph_osdmap *map;
551 u16 version;
552 u32 len, max, i;
553 u8 ev;
554 int err = -EINVAL;
555 void *start = *p;
556 struct ceph_pg_pool_info *pi;
557
558 dout("osdmap_decode %p to %p len %d\n", *p, end, (int)(end - *p));
559
560 map = kzalloc(sizeof(*map), GFP_NOFS);
561 if (map == NULL)
562 return ERR_PTR(-ENOMEM);
563 map->pg_temp = RB_ROOT;
564
565 ceph_decode_16_safe(p, end, version, bad);
566 if (version > CEPH_OSDMAP_VERSION) {
567 pr_warning("got unknown v %d > %d of osdmap\n", version,
568 CEPH_OSDMAP_VERSION);
569 goto bad;
570 }
571
572 ceph_decode_need(p, end, 2*sizeof(u64)+6*sizeof(u32), bad);
573 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
574 map->epoch = ceph_decode_32(p);
575 ceph_decode_copy(p, &map->created, sizeof(map->created));
576 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
577
578 ceph_decode_32_safe(p, end, max, bad);
579 while (max--) {
580 ceph_decode_need(p, end, 4 + 1 + sizeof(pi->v), bad);
581 pi = kzalloc(sizeof(*pi), GFP_NOFS);
582 if (!pi)
583 goto bad;
584 pi->id = ceph_decode_32(p);
585 ev = ceph_decode_8(p); /* encoding version */
586 if (ev > CEPH_PG_POOL_VERSION) {
587 pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
588 ev, CEPH_PG_POOL_VERSION);
589 kfree(pi);
590 goto bad;
591 }
592 err = __decode_pool(p, end, pi);
593 if (err < 0)
594 goto bad;
595 __insert_pg_pool(&map->pg_pools, pi);
596 }
597
598 if (version >= 5 && __decode_pool_names(p, end, map) < 0)
599 goto bad;
600
601 ceph_decode_32_safe(p, end, map->pool_max, bad);
602
603 ceph_decode_32_safe(p, end, map->flags, bad);
604
605 max = ceph_decode_32(p);
606
607 /* (re)alloc osd arrays */
608 err = osdmap_set_max_osd(map, max);
609 if (err < 0)
610 goto bad;
611 dout("osdmap_decode max_osd = %d\n", map->max_osd);
612
613 /* osds */
614 err = -EINVAL;
615 ceph_decode_need(p, end, 3*sizeof(u32) +
616 map->max_osd*(1 + sizeof(*map->osd_weight) +
617 sizeof(*map->osd_addr)), bad);
618 *p += 4; /* skip length field (should match max) */
619 ceph_decode_copy(p, map->osd_state, map->max_osd);
620
621 *p += 4; /* skip length field (should match max) */
622 for (i = 0; i < map->max_osd; i++)
623 map->osd_weight[i] = ceph_decode_32(p);
624
625 *p += 4; /* skip length field (should match max) */
626 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
627 for (i = 0; i < map->max_osd; i++)
628 ceph_decode_addr(&map->osd_addr[i]);
629
630 /* pg_temp */
631 ceph_decode_32_safe(p, end, len, bad);
632 for (i = 0; i < len; i++) {
633 int n, j;
634 struct ceph_pg pgid;
635 struct ceph_pg_mapping *pg;
636
637 ceph_decode_need(p, end, sizeof(u32) + sizeof(u64), bad);
638 ceph_decode_copy(p, &pgid, sizeof(pgid));
639 n = ceph_decode_32(p);
640 ceph_decode_need(p, end, n * sizeof(u32), bad);
641 err = -ENOMEM;
642 pg = kmalloc(sizeof(*pg) + n*sizeof(u32), GFP_NOFS);
643 if (!pg)
644 goto bad;
645 pg->pgid = pgid;
646 pg->len = n;
647 for (j = 0; j < n; j++)
648 pg->osds[j] = ceph_decode_32(p);
649
650 err = __insert_pg_mapping(pg, &map->pg_temp);
651 if (err)
652 goto bad;
653 dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid, len);
654 }
655
656 /* crush */
657 ceph_decode_32_safe(p, end, len, bad);
658 dout("osdmap_decode crush len %d from off 0x%x\n", len,
659 (int)(*p - start));
660 ceph_decode_need(p, end, len, bad);
661 map->crush = crush_decode(*p, end);
662 *p += len;
663 if (IS_ERR(map->crush)) {
664 err = PTR_ERR(map->crush);
665 map->crush = NULL;
666 goto bad;
667 }
668
669 /* ignore the rest of the map */
670 *p = end;
671
672 dout("osdmap_decode done %p %p\n", *p, end);
673 return map;
674
675 bad:
676 dout("osdmap_decode fail\n");
677 ceph_osdmap_destroy(map);
678 return ERR_PTR(err);
679 }
680
681 /*
682 * decode and apply an incremental map update.
683 */
684 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
685 struct ceph_osdmap *map,
686 struct ceph_messenger *msgr)
687 {
688 struct crush_map *newcrush = NULL;
689 struct ceph_fsid fsid;
690 u32 epoch = 0;
691 struct ceph_timespec modified;
692 u32 len, pool;
693 __s32 new_pool_max, new_flags, max;
694 void *start = *p;
695 int err = -EINVAL;
696 u16 version;
697 struct rb_node *rbp;
698
699 ceph_decode_16_safe(p, end, version, bad);
700 if (version > CEPH_OSDMAP_INC_VERSION) {
701 pr_warning("got unknown v %d > %d of inc osdmap\n", version,
702 CEPH_OSDMAP_INC_VERSION);
703 goto bad;
704 }
705
706 ceph_decode_need(p, end, sizeof(fsid)+sizeof(modified)+2*sizeof(u32),
707 bad);
708 ceph_decode_copy(p, &fsid, sizeof(fsid));
709 epoch = ceph_decode_32(p);
710 BUG_ON(epoch != map->epoch+1);
711 ceph_decode_copy(p, &modified, sizeof(modified));
712 new_pool_max = ceph_decode_32(p);
713 new_flags = ceph_decode_32(p);
714
715 /* full map? */
716 ceph_decode_32_safe(p, end, len, bad);
717 if (len > 0) {
718 dout("apply_incremental full map len %d, %p to %p\n",
719 len, *p, end);
720 return osdmap_decode(p, min(*p+len, end));
721 }
722
723 /* new crush? */
724 ceph_decode_32_safe(p, end, len, bad);
725 if (len > 0) {
726 dout("apply_incremental new crush map len %d, %p to %p\n",
727 len, *p, end);
728 newcrush = crush_decode(*p, min(*p+len, end));
729 if (IS_ERR(newcrush))
730 return ERR_CAST(newcrush);
731 *p += len;
732 }
733
734 /* new flags? */
735 if (new_flags >= 0)
736 map->flags = new_flags;
737 if (new_pool_max >= 0)
738 map->pool_max = new_pool_max;
739
740 ceph_decode_need(p, end, 5*sizeof(u32), bad);
741
742 /* new max? */
743 max = ceph_decode_32(p);
744 if (max >= 0) {
745 err = osdmap_set_max_osd(map, max);
746 if (err < 0)
747 goto bad;
748 }
749
750 map->epoch++;
751 map->modified = map->modified;
752 if (newcrush) {
753 if (map->crush)
754 crush_destroy(map->crush);
755 map->crush = newcrush;
756 newcrush = NULL;
757 }
758
759 /* new_pool */
760 ceph_decode_32_safe(p, end, len, bad);
761 while (len--) {
762 __u8 ev;
763 struct ceph_pg_pool_info *pi;
764
765 ceph_decode_32_safe(p, end, pool, bad);
766 ceph_decode_need(p, end, 1 + sizeof(pi->v), bad);
767 ev = ceph_decode_8(p); /* encoding version */
768 if (ev > CEPH_PG_POOL_VERSION) {
769 pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
770 ev, CEPH_PG_POOL_VERSION);
771 goto bad;
772 }
773 pi = __lookup_pg_pool(&map->pg_pools, pool);
774 if (!pi) {
775 pi = kzalloc(sizeof(*pi), GFP_NOFS);
776 if (!pi) {
777 err = -ENOMEM;
778 goto bad;
779 }
780 pi->id = pool;
781 __insert_pg_pool(&map->pg_pools, pi);
782 }
783 err = __decode_pool(p, end, pi);
784 if (err < 0)
785 goto bad;
786 }
787 if (version >= 5 && __decode_pool_names(p, end, map) < 0)
788 goto bad;
789
790 /* old_pool */
791 ceph_decode_32_safe(p, end, len, bad);
792 while (len--) {
793 struct ceph_pg_pool_info *pi;
794
795 ceph_decode_32_safe(p, end, pool, bad);
796 pi = __lookup_pg_pool(&map->pg_pools, pool);
797 if (pi)
798 __remove_pg_pool(&map->pg_pools, pi);
799 }
800
801 /* new_up */
802 err = -EINVAL;
803 ceph_decode_32_safe(p, end, len, bad);
804 while (len--) {
805 u32 osd;
806 struct ceph_entity_addr addr;
807 ceph_decode_32_safe(p, end, osd, bad);
808 ceph_decode_copy_safe(p, end, &addr, sizeof(addr), bad);
809 ceph_decode_addr(&addr);
810 pr_info("osd%d up\n", osd);
811 BUG_ON(osd >= map->max_osd);
812 map->osd_state[osd] |= CEPH_OSD_UP;
813 map->osd_addr[osd] = addr;
814 }
815
816 /* new_down */
817 ceph_decode_32_safe(p, end, len, bad);
818 while (len--) {
819 u32 osd;
820 ceph_decode_32_safe(p, end, osd, bad);
821 (*p)++; /* clean flag */
822 pr_info("osd%d down\n", osd);
823 if (osd < map->max_osd)
824 map->osd_state[osd] &= ~CEPH_OSD_UP;
825 }
826
827 /* new_weight */
828 ceph_decode_32_safe(p, end, len, bad);
829 while (len--) {
830 u32 osd, off;
831 ceph_decode_need(p, end, sizeof(u32)*2, bad);
832 osd = ceph_decode_32(p);
833 off = ceph_decode_32(p);
834 pr_info("osd%d weight 0x%x %s\n", osd, off,
835 off == CEPH_OSD_IN ? "(in)" :
836 (off == CEPH_OSD_OUT ? "(out)" : ""));
837 if (osd < map->max_osd)
838 map->osd_weight[osd] = off;
839 }
840
841 /* new_pg_temp */
842 rbp = rb_first(&map->pg_temp);
843 ceph_decode_32_safe(p, end, len, bad);
844 while (len--) {
845 struct ceph_pg_mapping *pg;
846 int j;
847 struct ceph_pg pgid;
848 u32 pglen;
849 ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad);
850 ceph_decode_copy(p, &pgid, sizeof(pgid));
851 pglen = ceph_decode_32(p);
852
853 /* remove any? */
854 while (rbp && pgid_cmp(rb_entry(rbp, struct ceph_pg_mapping,
855 node)->pgid, pgid) <= 0) {
856 struct ceph_pg_mapping *cur =
857 rb_entry(rbp, struct ceph_pg_mapping, node);
858
859 rbp = rb_next(rbp);
860 dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid);
861 rb_erase(&cur->node, &map->pg_temp);
862 kfree(cur);
863 }
864
865 if (pglen) {
866 /* insert */
867 ceph_decode_need(p, end, pglen*sizeof(u32), bad);
868 pg = kmalloc(sizeof(*pg) + sizeof(u32)*pglen, GFP_NOFS);
869 if (!pg) {
870 err = -ENOMEM;
871 goto bad;
872 }
873 pg->pgid = pgid;
874 pg->len = pglen;
875 for (j = 0; j < pglen; j++)
876 pg->osds[j] = ceph_decode_32(p);
877 err = __insert_pg_mapping(pg, &map->pg_temp);
878 if (err) {
879 kfree(pg);
880 goto bad;
881 }
882 dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid,
883 pglen);
884 }
885 }
886 while (rbp) {
887 struct ceph_pg_mapping *cur =
888 rb_entry(rbp, struct ceph_pg_mapping, node);
889
890 rbp = rb_next(rbp);
891 dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid);
892 rb_erase(&cur->node, &map->pg_temp);
893 kfree(cur);
894 }
895
896 /* ignore the rest */
897 *p = end;
898 return map;
899
900 bad:
901 pr_err("corrupt inc osdmap epoch %d off %d (%p of %p-%p)\n",
902 epoch, (int)(*p - start), *p, start, end);
903 print_hex_dump(KERN_DEBUG, "osdmap: ",
904 DUMP_PREFIX_OFFSET, 16, 1,
905 start, end - start, true);
906 if (newcrush)
907 crush_destroy(newcrush);
908 return ERR_PTR(err);
909 }
910
911
912
913
914 /*
915 * calculate file layout from given offset, length.
916 * fill in correct oid, logical length, and object extent
917 * offset, length.
918 *
919 * for now, we write only a single su, until we can
920 * pass a stride back to the caller.
921 */
922 void ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
923 u64 off, u64 *plen,
924 u64 *ono,
925 u64 *oxoff, u64 *oxlen)
926 {
927 u32 osize = le32_to_cpu(layout->fl_object_size);
928 u32 su = le32_to_cpu(layout->fl_stripe_unit);
929 u32 sc = le32_to_cpu(layout->fl_stripe_count);
930 u32 bl, stripeno, stripepos, objsetno;
931 u32 su_per_object;
932 u64 t, su_offset;
933
934 dout("mapping %llu~%llu osize %u fl_su %u\n", off, *plen,
935 osize, su);
936 su_per_object = osize / su;
937 dout("osize %u / su %u = su_per_object %u\n", osize, su,
938 su_per_object);
939
940 BUG_ON((su & ~PAGE_MASK) != 0);
941 /* bl = *off / su; */
942 t = off;
943 do_div(t, su);
944 bl = t;
945 dout("off %llu / su %u = bl %u\n", off, su, bl);
946
947 stripeno = bl / sc;
948 stripepos = bl % sc;
949 objsetno = stripeno / su_per_object;
950
951 *ono = objsetno * sc + stripepos;
952 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned)*ono);
953
954 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
955 t = off;
956 su_offset = do_div(t, su);
957 *oxoff = su_offset + (stripeno % su_per_object) * su;
958
959 /*
960 * Calculate the length of the extent being written to the selected
961 * object. This is the minimum of the full length requested (plen) or
962 * the remainder of the current stripe being written to.
963 */
964 *oxlen = min_t(u64, *plen, su - su_offset);
965 *plen = *oxlen;
966
967 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
968 }
969
970 /*
971 * calculate an object layout (i.e. pgid) from an oid,
972 * file_layout, and osdmap
973 */
974 int ceph_calc_object_layout(struct ceph_object_layout *ol,
975 const char *oid,
976 struct ceph_file_layout *fl,
977 struct ceph_osdmap *osdmap)
978 {
979 unsigned num, num_mask;
980 struct ceph_pg pgid;
981 s32 preferred = (s32)le32_to_cpu(fl->fl_pg_preferred);
982 int poolid = le32_to_cpu(fl->fl_pg_pool);
983 struct ceph_pg_pool_info *pool;
984 unsigned ps;
985
986 BUG_ON(!osdmap);
987
988 pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
989 if (!pool)
990 return -EIO;
991 ps = ceph_str_hash(pool->v.object_hash, oid, strlen(oid));
992 if (preferred >= 0) {
993 ps += preferred;
994 num = le32_to_cpu(pool->v.lpg_num);
995 num_mask = pool->lpg_num_mask;
996 } else {
997 num = le32_to_cpu(pool->v.pg_num);
998 num_mask = pool->pg_num_mask;
999 }
1000
1001 pgid.ps = cpu_to_le16(ps);
1002 pgid.preferred = cpu_to_le16(preferred);
1003 pgid.pool = fl->fl_pg_pool;
1004 if (preferred >= 0)
1005 dout("calc_object_layout '%s' pgid %d.%xp%d\n", oid, poolid, ps,
1006 (int)preferred);
1007 else
1008 dout("calc_object_layout '%s' pgid %d.%x\n", oid, poolid, ps);
1009
1010 ol->ol_pgid = pgid;
1011 ol->ol_stripe_unit = fl->fl_object_stripe_unit;
1012 return 0;
1013 }
1014
1015 /*
1016 * Calculate raw osd vector for the given pgid. Return pointer to osd
1017 * array, or NULL on failure.
1018 */
1019 static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
1020 int *osds, int *num)
1021 {
1022 struct ceph_pg_mapping *pg;
1023 struct ceph_pg_pool_info *pool;
1024 int ruleno;
1025 unsigned poolid, ps, pps;
1026 int preferred;
1027
1028 /* pg_temp? */
1029 pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
1030 if (pg) {
1031 *num = pg->len;
1032 return pg->osds;
1033 }
1034
1035 /* crush */
1036 poolid = le32_to_cpu(pgid.pool);
1037 ps = le16_to_cpu(pgid.ps);
1038 preferred = (s16)le16_to_cpu(pgid.preferred);
1039
1040 /* don't forcefeed bad device ids to crush */
1041 if (preferred >= osdmap->max_osd ||
1042 preferred >= osdmap->crush->max_devices)
1043 preferred = -1;
1044
1045 pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
1046 if (!pool)
1047 return NULL;
1048 ruleno = crush_find_rule(osdmap->crush, pool->v.crush_ruleset,
1049 pool->v.type, pool->v.size);
1050 if (ruleno < 0) {
1051 pr_err("no crush rule pool %d ruleset %d type %d size %d\n",
1052 poolid, pool->v.crush_ruleset, pool->v.type,
1053 pool->v.size);
1054 return NULL;
1055 }
1056
1057 if (preferred >= 0)
1058 pps = ceph_stable_mod(ps,
1059 le32_to_cpu(pool->v.lpgp_num),
1060 pool->lpgp_num_mask);
1061 else
1062 pps = ceph_stable_mod(ps,
1063 le32_to_cpu(pool->v.pgp_num),
1064 pool->pgp_num_mask);
1065 pps += poolid;
1066 *num = crush_do_rule(osdmap->crush, ruleno, pps, osds,
1067 min_t(int, pool->v.size, *num),
1068 preferred, osdmap->osd_weight);
1069 return osds;
1070 }
1071
1072 /*
1073 * Return acting set for given pgid.
1074 */
1075 int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
1076 int *acting)
1077 {
1078 int rawosds[CEPH_PG_MAX_SIZE], *osds;
1079 int i, o, num = CEPH_PG_MAX_SIZE;
1080
1081 osds = calc_pg_raw(osdmap, pgid, rawosds, &num);
1082 if (!osds)
1083 return -1;
1084
1085 /* primary is first up osd */
1086 o = 0;
1087 for (i = 0; i < num; i++)
1088 if (ceph_osd_is_up(osdmap, osds[i]))
1089 acting[o++] = osds[i];
1090 return o;
1091 }
1092
1093 /*
1094 * Return primary osd for given pgid, or -1 if none.
1095 */
1096 int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid)
1097 {
1098 int rawosds[CEPH_PG_MAX_SIZE], *osds;
1099 int i, num = CEPH_PG_MAX_SIZE;
1100
1101 osds = calc_pg_raw(osdmap, pgid, rawosds, &num);
1102 if (!osds)
1103 return -1;
1104
1105 /* primary is first up osd */
1106 for (i = 0; i < num; i++)
1107 if (ceph_osd_is_up(osdmap, osds[i]))
1108 return osds[i];
1109 return -1;
1110 }
Tomato firmware and modifications.