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netdev: bfin_mac: clean up printk messages
[linux-2.6.git] / net / ceph / osdmap.c
blobd73f3f6efa36ff6cf9efc33cada1853afa8073e7
1
2 #include <linux/ceph/ceph_debug.h>
3
4 #include <linux/module.h>
5 #include <linux/slab.h>
6 #include <asm/div64.h>
7
8 #include <linux/ceph/libceph.h>
9 #include <linux/ceph/osdmap.h>
10 #include <linux/ceph/decode.h>
11 #include <linux/crush/hash.h>
12 #include <linux/crush/mapper.h>
13
14 char *ceph_osdmap_state_str(char *str, int len, int state)
15 {
16 int flag = 0;
17
18 if (!len)
19 goto done;
20
21 *str = '\0';
22 if (state) {
23 if (state & CEPH_OSD_EXISTS) {
24 snprintf(str, len, "exists");
25 flag = 1;
26 }
27 if (state & CEPH_OSD_UP) {
28 snprintf(str, len, "%s%s%s", str, (flag ? ", " : ""),
29 "up");
30 flag = 1;
31 }
32 } else {
33 snprintf(str, len, "doesn't exist");
34 }
35 done:
36 return str;
37 }
38
39 /* maps */
40
41 static int calc_bits_of(unsigned t)
42 {
43 int b = 0;
44 while (t) {
45 t = t >> 1;
46 b++;
47 }
48 return b;
49 }
50
51 /*
52 * the foo_mask is the smallest value 2^n-1 that is >= foo.
53 */
54 static void calc_pg_masks(struct ceph_pg_pool_info *pi)
55 {
56 pi->pg_num_mask = (1 << calc_bits_of(le32_to_cpu(pi->v.pg_num)-1)) - 1;
57 pi->pgp_num_mask =
58 (1 << calc_bits_of(le32_to_cpu(pi->v.pgp_num)-1)) - 1;
59 pi->lpg_num_mask =
60 (1 << calc_bits_of(le32_to_cpu(pi->v.lpg_num)-1)) - 1;
61 pi->lpgp_num_mask =
62 (1 << calc_bits_of(le32_to_cpu(pi->v.lpgp_num)-1)) - 1;
63 }
64
65 /*
66 * decode crush map
67 */
68 static int crush_decode_uniform_bucket(void **p, void *end,
69 struct crush_bucket_uniform *b)
70 {
71 dout("crush_decode_uniform_bucket %p to %p\n", *p, end);
72 ceph_decode_need(p, end, (1+b->h.size) * sizeof(u32), bad);
73 b->item_weight = ceph_decode_32(p);
74 return 0;
75 bad:
76 return -EINVAL;
77 }
78
79 static int crush_decode_list_bucket(void **p, void *end,
80 struct crush_bucket_list *b)
81 {
82 int j;
83 dout("crush_decode_list_bucket %p to %p\n", *p, end);
84 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
85 if (b->item_weights == NULL)
86 return -ENOMEM;
87 b->sum_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
88 if (b->sum_weights == NULL)
89 return -ENOMEM;
90 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
91 for (j = 0; j < b->h.size; j++) {
92 b->item_weights[j] = ceph_decode_32(p);
93 b->sum_weights[j] = ceph_decode_32(p);
94 }
95 return 0;
96 bad:
97 return -EINVAL;
98 }
99
100 static int crush_decode_tree_bucket(void **p, void *end,
101 struct crush_bucket_tree *b)
102 {
103 int j;
104 dout("crush_decode_tree_bucket %p to %p\n", *p, end);
105 ceph_decode_32_safe(p, end, b->num_nodes, bad);
106 b->node_weights = kcalloc(b->num_nodes, sizeof(u32), GFP_NOFS);
107 if (b->node_weights == NULL)
108 return -ENOMEM;
109 ceph_decode_need(p, end, b->num_nodes * sizeof(u32), bad);
110 for (j = 0; j < b->num_nodes; j++)
111 b->node_weights[j] = ceph_decode_32(p);
112 return 0;
113 bad:
114 return -EINVAL;
115 }
116
117 static int crush_decode_straw_bucket(void **p, void *end,
118 struct crush_bucket_straw *b)
119 {
120 int j;
121 dout("crush_decode_straw_bucket %p to %p\n", *p, end);
122 b->item_weights = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
123 if (b->item_weights == NULL)
124 return -ENOMEM;
125 b->straws = kcalloc(b->h.size, sizeof(u32), GFP_NOFS);
126 if (b->straws == NULL)
127 return -ENOMEM;
128 ceph_decode_need(p, end, 2 * b->h.size * sizeof(u32), bad);
129 for (j = 0; j < b->h.size; j++) {
130 b->item_weights[j] = ceph_decode_32(p);
131 b->straws[j] = ceph_decode_32(p);
132 }
133 return 0;
134 bad:
135 return -EINVAL;
136 }
137
138 static struct crush_map *crush_decode(void *pbyval, void *end)
139 {
140 struct crush_map *c;
141 int err = -EINVAL;
142 int i, j;
143 void **p = &pbyval;
144 void *start = pbyval;
145 u32 magic;
146
147 dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p));
148
149 c = kzalloc(sizeof(*c), GFP_NOFS);
150 if (c == NULL)
151 return ERR_PTR(-ENOMEM);
152
153 ceph_decode_need(p, end, 4*sizeof(u32), bad);
154 magic = ceph_decode_32(p);
155 if (magic != CRUSH_MAGIC) {
156 pr_err("crush_decode magic %x != current %x\n",
157 (unsigned)magic, (unsigned)CRUSH_MAGIC);
158 goto bad;
159 }
160 c->max_buckets = ceph_decode_32(p);
161 c->max_rules = ceph_decode_32(p);
162 c->max_devices = ceph_decode_32(p);
163
164 c->device_parents = kcalloc(c->max_devices, sizeof(u32), GFP_NOFS);
165 if (c->device_parents == NULL)
166 goto badmem;
167 c->bucket_parents = kcalloc(c->max_buckets, sizeof(u32), GFP_NOFS);
168 if (c->bucket_parents == NULL)
169 goto badmem;
170
171 c->buckets = kcalloc(c->max_buckets, sizeof(*c->buckets), GFP_NOFS);
172 if (c->buckets == NULL)
173 goto badmem;
174 c->rules = kcalloc(c->max_rules, sizeof(*c->rules), GFP_NOFS);
175 if (c->rules == NULL)
176 goto badmem;
177
178 /* buckets */
179 for (i = 0; i < c->max_buckets; i++) {
180 int size = 0;
181 u32 alg;
182 struct crush_bucket *b;
183
184 ceph_decode_32_safe(p, end, alg, bad);
185 if (alg == 0) {
186 c->buckets[i] = NULL;
187 continue;
188 }
189 dout("crush_decode bucket %d off %x %p to %p\n",
190 i, (int)(*p-start), *p, end);
191
192 switch (alg) {
193 case CRUSH_BUCKET_UNIFORM:
194 size = sizeof(struct crush_bucket_uniform);
195 break;
196 case CRUSH_BUCKET_LIST:
197 size = sizeof(struct crush_bucket_list);
198 break;
199 case CRUSH_BUCKET_TREE:
200 size = sizeof(struct crush_bucket_tree);
201 break;
202 case CRUSH_BUCKET_STRAW:
203 size = sizeof(struct crush_bucket_straw);
204 break;
205 default:
206 err = -EINVAL;
207 goto bad;
208 }
209 BUG_ON(size == 0);
210 b = c->buckets[i] = kzalloc(size, GFP_NOFS);
211 if (b == NULL)
212 goto badmem;
213
214 ceph_decode_need(p, end, 4*sizeof(u32), bad);
215 b->id = ceph_decode_32(p);
216 b->type = ceph_decode_16(p);
217 b->alg = ceph_decode_8(p);
218 b->hash = ceph_decode_8(p);
219 b->weight = ceph_decode_32(p);
220 b->size = ceph_decode_32(p);
221
222 dout("crush_decode bucket size %d off %x %p to %p\n",
223 b->size, (int)(*p-start), *p, end);
224
225 b->items = kcalloc(b->size, sizeof(__s32), GFP_NOFS);
226 if (b->items == NULL)
227 goto badmem;
228 b->perm = kcalloc(b->size, sizeof(u32), GFP_NOFS);
229 if (b->perm == NULL)
230 goto badmem;
231 b->perm_n = 0;
232
233 ceph_decode_need(p, end, b->size*sizeof(u32), bad);
234 for (j = 0; j < b->size; j++)
235 b->items[j] = ceph_decode_32(p);
236
237 switch (b->alg) {
238 case CRUSH_BUCKET_UNIFORM:
239 err = crush_decode_uniform_bucket(p, end,
240 (struct crush_bucket_uniform *)b);
241 if (err < 0)
242 goto bad;
243 break;
244 case CRUSH_BUCKET_LIST:
245 err = crush_decode_list_bucket(p, end,
246 (struct crush_bucket_list *)b);
247 if (err < 0)
248 goto bad;
249 break;
250 case CRUSH_BUCKET_TREE:
251 err = crush_decode_tree_bucket(p, end,
252 (struct crush_bucket_tree *)b);
253 if (err < 0)
254 goto bad;
255 break;
256 case CRUSH_BUCKET_STRAW:
257 err = crush_decode_straw_bucket(p, end,
258 (struct crush_bucket_straw *)b);
259 if (err < 0)
260 goto bad;
261 break;
262 }
263 }
264
265 /* rules */
266 dout("rule vec is %p\n", c->rules);
267 for (i = 0; i < c->max_rules; i++) {
268 u32 yes;
269 struct crush_rule *r;
270
271 ceph_decode_32_safe(p, end, yes, bad);
272 if (!yes) {
273 dout("crush_decode NO rule %d off %x %p to %p\n",
274 i, (int)(*p-start), *p, end);
275 c->rules[i] = NULL;
276 continue;
277 }
278
279 dout("crush_decode rule %d off %x %p to %p\n",
280 i, (int)(*p-start), *p, end);
281
282 /* len */
283 ceph_decode_32_safe(p, end, yes, bad);
284 #if BITS_PER_LONG == 32
285 err = -EINVAL;
286 if (yes > ULONG_MAX / sizeof(struct crush_rule_step))
287 goto bad;
288 #endif
289 r = c->rules[i] = kmalloc(sizeof(*r) +
290 yes*sizeof(struct crush_rule_step),
291 GFP_NOFS);
292 if (r == NULL)
293 goto badmem;
294 dout(" rule %d is at %p\n", i, r);
295 r->len = yes;
296 ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
297 ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);
298 for (j = 0; j < r->len; j++) {
299 r->steps[j].op = ceph_decode_32(p);
300 r->steps[j].arg1 = ceph_decode_32(p);
301 r->steps[j].arg2 = ceph_decode_32(p);
302 }
303 }
304
305 /* ignore trailing name maps. */
306
307 dout("crush_decode success\n");
308 return c;
309
310 badmem:
311 err = -ENOMEM;
312 bad:
313 dout("crush_decode fail %d\n", err);
314 crush_destroy(c);
315 return ERR_PTR(err);
316 }
317
318 /*
319 * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid
320 * to a set of osds)
321 */
322 static int pgid_cmp(struct ceph_pg l, struct ceph_pg r)
323 {
324 u64 a = *(u64 *)&l;
325 u64 b = *(u64 *)&r;
326
327 if (a < b)
328 return -1;
329 if (a > b)
330 return 1;
331 return 0;
332 }
333
334 static int __insert_pg_mapping(struct ceph_pg_mapping *new,
335 struct rb_root *root)
336 {
337 struct rb_node **p = &root->rb_node;
338 struct rb_node *parent = NULL;
339 struct ceph_pg_mapping *pg = NULL;
340 int c;
341
342 while (*p) {
343 parent = *p;
344 pg = rb_entry(parent, struct ceph_pg_mapping, node);
345 c = pgid_cmp(new->pgid, pg->pgid);
346 if (c < 0)
347 p = &(*p)->rb_left;
348 else if (c > 0)
349 p = &(*p)->rb_right;
350 else
351 return -EEXIST;
352 }
353
354 rb_link_node(&new->node, parent, p);
355 rb_insert_color(&new->node, root);
356 return 0;
357 }
358
359 static struct ceph_pg_mapping *__lookup_pg_mapping(struct rb_root *root,
360 struct ceph_pg pgid)
361 {
362 struct rb_node *n = root->rb_node;
363 struct ceph_pg_mapping *pg;
364 int c;
365
366 while (n) {
367 pg = rb_entry(n, struct ceph_pg_mapping, node);
368 c = pgid_cmp(pgid, pg->pgid);
369 if (c < 0)
370 n = n->rb_left;
371 else if (c > 0)
372 n = n->rb_right;
373 else
374 return pg;
375 }
376 return NULL;
377 }
378
379 /*
380 * rbtree of pg pool info
381 */
382 static int __insert_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *new)
383 {
384 struct rb_node **p = &root->rb_node;
385 struct rb_node *parent = NULL;
386 struct ceph_pg_pool_info *pi = NULL;
387
388 while (*p) {
389 parent = *p;
390 pi = rb_entry(parent, struct ceph_pg_pool_info, node);
391 if (new->id < pi->id)
392 p = &(*p)->rb_left;
393 else if (new->id > pi->id)
394 p = &(*p)->rb_right;
395 else
396 return -EEXIST;
397 }
398
399 rb_link_node(&new->node, parent, p);
400 rb_insert_color(&new->node, root);
401 return 0;
402 }
403
404 static struct ceph_pg_pool_info *__lookup_pg_pool(struct rb_root *root, int id)
405 {
406 struct ceph_pg_pool_info *pi;
407 struct rb_node *n = root->rb_node;
408
409 while (n) {
410 pi = rb_entry(n, struct ceph_pg_pool_info, node);
411 if (id < pi->id)
412 n = n->rb_left;
413 else if (id > pi->id)
414 n = n->rb_right;
415 else
416 return pi;
417 }
418 return NULL;
419 }
420
421 int ceph_pg_poolid_by_name(struct ceph_osdmap *map, const char *name)
422 {
423 struct rb_node *rbp;
424
425 for (rbp = rb_first(&map->pg_pools); rbp; rbp = rb_next(rbp)) {
426 struct ceph_pg_pool_info *pi =
427 rb_entry(rbp, struct ceph_pg_pool_info, node);
428 if (pi->name && strcmp(pi->name, name) == 0)
429 return pi->id;
430 }
431 return -ENOENT;
432 }
433 EXPORT_SYMBOL(ceph_pg_poolid_by_name);
434
435 static void __remove_pg_pool(struct rb_root *root, struct ceph_pg_pool_info *pi)
436 {
437 rb_erase(&pi->node, root);
438 kfree(pi->name);
439 kfree(pi);
440 }
441
442 static int __decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi)
443 {
444 unsigned n, m;
445
446 ceph_decode_copy(p, &pi->v, sizeof(pi->v));
447 calc_pg_masks(pi);
448
449 /* num_snaps * snap_info_t */
450 n = le32_to_cpu(pi->v.num_snaps);
451 while (n--) {
452 ceph_decode_need(p, end, sizeof(u64) + 1 + sizeof(u64) +
453 sizeof(struct ceph_timespec), bad);
454 *p += sizeof(u64) + /* key */
455 1 + sizeof(u64) + /* u8, snapid */
456 sizeof(struct ceph_timespec);
457 m = ceph_decode_32(p); /* snap name */
458 *p += m;
459 }
460
461 *p += le32_to_cpu(pi->v.num_removed_snap_intervals) * sizeof(u64) * 2;
462 return 0;
463
464 bad:
465 return -EINVAL;
466 }
467
468 static int __decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
469 {
470 struct ceph_pg_pool_info *pi;
471 u32 num, len, pool;
472
473 ceph_decode_32_safe(p, end, num, bad);
474 dout(" %d pool names\n", num);
475 while (num--) {
476 ceph_decode_32_safe(p, end, pool, bad);
477 ceph_decode_32_safe(p, end, len, bad);
478 dout(" pool %d len %d\n", pool, len);
479 pi = __lookup_pg_pool(&map->pg_pools, pool);
480 if (pi) {
481 kfree(pi->name);
482 pi->name = kmalloc(len + 1, GFP_NOFS);
483 if (pi->name) {
484 memcpy(pi->name, *p, len);
485 pi->name[len] = '\0';
486 dout(" name is %s\n", pi->name);
487 }
488 }
489 *p += len;
490 }
491 return 0;
492
493 bad:
494 return -EINVAL;
495 }
496
497 /*
498 * osd map
499 */
500 void ceph_osdmap_destroy(struct ceph_osdmap *map)
501 {
502 dout("osdmap_destroy %p\n", map);
503 if (map->crush)
504 crush_destroy(map->crush);
505 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
506 struct ceph_pg_mapping *pg =
507 rb_entry(rb_first(&map->pg_temp),
508 struct ceph_pg_mapping, node);
509 rb_erase(&pg->node, &map->pg_temp);
510 kfree(pg);
511 }
512 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
513 struct ceph_pg_pool_info *pi =
514 rb_entry(rb_first(&map->pg_pools),
515 struct ceph_pg_pool_info, node);
516 __remove_pg_pool(&map->pg_pools, pi);
517 }
518 kfree(map->osd_state);
519 kfree(map->osd_weight);
520 kfree(map->osd_addr);
521 kfree(map);
522 }
523
524 /*
525 * adjust max osd value. reallocate arrays.
526 */
527 static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
528 {
529 u8 *state;
530 struct ceph_entity_addr *addr;
531 u32 *weight;
532
533 state = kcalloc(max, sizeof(*state), GFP_NOFS);
534 addr = kcalloc(max, sizeof(*addr), GFP_NOFS);
535 weight = kcalloc(max, sizeof(*weight), GFP_NOFS);
536 if (state == NULL || addr == NULL || weight == NULL) {
537 kfree(state);
538 kfree(addr);
539 kfree(weight);
540 return -ENOMEM;
541 }
542
543 /* copy old? */
544 if (map->osd_state) {
545 memcpy(state, map->osd_state, map->max_osd*sizeof(*state));
546 memcpy(addr, map->osd_addr, map->max_osd*sizeof(*addr));
547 memcpy(weight, map->osd_weight, map->max_osd*sizeof(*weight));
548 kfree(map->osd_state);
549 kfree(map->osd_addr);
550 kfree(map->osd_weight);
551 }
552
553 map->osd_state = state;
554 map->osd_weight = weight;
555 map->osd_addr = addr;
556 map->max_osd = max;
557 return 0;
558 }
559
560 /*
561 * decode a full map.
562 */
563 struct ceph_osdmap *osdmap_decode(void **p, void *end)
564 {
565 struct ceph_osdmap *map;
566 u16 version;
567 u32 len, max, i;
568 u8 ev;
569 int err = -EINVAL;
570 void *start = *p;
571 struct ceph_pg_pool_info *pi;
572
573 dout("osdmap_decode %p to %p len %d\n", *p, end, (int)(end - *p));
574
575 map = kzalloc(sizeof(*map), GFP_NOFS);
576 if (map == NULL)
577 return ERR_PTR(-ENOMEM);
578 map->pg_temp = RB_ROOT;
579
580 ceph_decode_16_safe(p, end, version, bad);
581 if (version > CEPH_OSDMAP_VERSION) {
582 pr_warning("got unknown v %d > %d of osdmap\n", version,
583 CEPH_OSDMAP_VERSION);
584 goto bad;
585 }
586
587 ceph_decode_need(p, end, 2*sizeof(u64)+6*sizeof(u32), bad);
588 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
589 map->epoch = ceph_decode_32(p);
590 ceph_decode_copy(p, &map->created, sizeof(map->created));
591 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
592
593 ceph_decode_32_safe(p, end, max, bad);
594 while (max--) {
595 ceph_decode_need(p, end, 4 + 1 + sizeof(pi->v), bad);
596 pi = kzalloc(sizeof(*pi), GFP_NOFS);
597 if (!pi)
598 goto bad;
599 pi->id = ceph_decode_32(p);
600 ev = ceph_decode_8(p); /* encoding version */
601 if (ev > CEPH_PG_POOL_VERSION) {
602 pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
603 ev, CEPH_PG_POOL_VERSION);
604 kfree(pi);
605 goto bad;
606 }
607 err = __decode_pool(p, end, pi);
608 if (err < 0)
609 goto bad;
610 __insert_pg_pool(&map->pg_pools, pi);
611 }
612
613 if (version >= 5 && __decode_pool_names(p, end, map) < 0)
614 goto bad;
615
616 ceph_decode_32_safe(p, end, map->pool_max, bad);
617
618 ceph_decode_32_safe(p, end, map->flags, bad);
619
620 max = ceph_decode_32(p);
621
622 /* (re)alloc osd arrays */
623 err = osdmap_set_max_osd(map, max);
624 if (err < 0)
625 goto bad;
626 dout("osdmap_decode max_osd = %d\n", map->max_osd);
627
628 /* osds */
629 err = -EINVAL;
630 ceph_decode_need(p, end, 3*sizeof(u32) +
631 map->max_osd*(1 + sizeof(*map->osd_weight) +
632 sizeof(*map->osd_addr)), bad);
633 *p += 4; /* skip length field (should match max) */
634 ceph_decode_copy(p, map->osd_state, map->max_osd);
635
636 *p += 4; /* skip length field (should match max) */
637 for (i = 0; i < map->max_osd; i++)
638 map->osd_weight[i] = ceph_decode_32(p);
639
640 *p += 4; /* skip length field (should match max) */
641 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
642 for (i = 0; i < map->max_osd; i++)
643 ceph_decode_addr(&map->osd_addr[i]);
644
645 /* pg_temp */
646 ceph_decode_32_safe(p, end, len, bad);
647 for (i = 0; i < len; i++) {
648 int n, j;
649 struct ceph_pg pgid;
650 struct ceph_pg_mapping *pg;
651
652 ceph_decode_need(p, end, sizeof(u32) + sizeof(u64), bad);
653 ceph_decode_copy(p, &pgid, sizeof(pgid));
654 n = ceph_decode_32(p);
655 ceph_decode_need(p, end, n * sizeof(u32), bad);
656 err = -ENOMEM;
657 pg = kmalloc(sizeof(*pg) + n*sizeof(u32), GFP_NOFS);
658 if (!pg)
659 goto bad;
660 pg->pgid = pgid;
661 pg->len = n;
662 for (j = 0; j < n; j++)
663 pg->osds[j] = ceph_decode_32(p);
664
665 err = __insert_pg_mapping(pg, &map->pg_temp);
666 if (err)
667 goto bad;
668 dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid, len);
669 }
670
671 /* crush */
672 ceph_decode_32_safe(p, end, len, bad);
673 dout("osdmap_decode crush len %d from off 0x%x\n", len,
674 (int)(*p - start));
675 ceph_decode_need(p, end, len, bad);
676 map->crush = crush_decode(*p, end);
677 *p += len;
678 if (IS_ERR(map->crush)) {
679 err = PTR_ERR(map->crush);
680 map->crush = NULL;
681 goto bad;
682 }
683
684 /* ignore the rest of the map */
685 *p = end;
686
687 dout("osdmap_decode done %p %p\n", *p, end);
688 return map;
689
690 bad:
691 dout("osdmap_decode fail\n");
692 ceph_osdmap_destroy(map);
693 return ERR_PTR(err);
694 }
695
696 /*
697 * decode and apply an incremental map update.
698 */
699 struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
700 struct ceph_osdmap *map,
701 struct ceph_messenger *msgr)
702 {
703 struct crush_map *newcrush = NULL;
704 struct ceph_fsid fsid;
705 u32 epoch = 0;
706 struct ceph_timespec modified;
707 u32 len, pool;
708 __s32 new_pool_max, new_flags, max;
709 void *start = *p;
710 int err = -EINVAL;
711 u16 version;
712 struct rb_node *rbp;
713
714 ceph_decode_16_safe(p, end, version, bad);
715 if (version > CEPH_OSDMAP_INC_VERSION) {
716 pr_warning("got unknown v %d > %d of inc osdmap\n", version,
717 CEPH_OSDMAP_INC_VERSION);
718 goto bad;
719 }
720
721 ceph_decode_need(p, end, sizeof(fsid)+sizeof(modified)+2*sizeof(u32),
722 bad);
723 ceph_decode_copy(p, &fsid, sizeof(fsid));
724 epoch = ceph_decode_32(p);
725 BUG_ON(epoch != map->epoch+1);
726 ceph_decode_copy(p, &modified, sizeof(modified));
727 new_pool_max = ceph_decode_32(p);
728 new_flags = ceph_decode_32(p);
729
730 /* full map? */
731 ceph_decode_32_safe(p, end, len, bad);
732 if (len > 0) {
733 dout("apply_incremental full map len %d, %p to %p\n",
734 len, *p, end);
735 return osdmap_decode(p, min(*p+len, end));
736 }
737
738 /* new crush? */
739 ceph_decode_32_safe(p, end, len, bad);
740 if (len > 0) {
741 dout("apply_incremental new crush map len %d, %p to %p\n",
742 len, *p, end);
743 newcrush = crush_decode(*p, min(*p+len, end));
744 if (IS_ERR(newcrush))
745 return ERR_CAST(newcrush);
746 *p += len;
747 }
748
749 /* new flags? */
750 if (new_flags >= 0)
751 map->flags = new_flags;
752 if (new_pool_max >= 0)
753 map->pool_max = new_pool_max;
754
755 ceph_decode_need(p, end, 5*sizeof(u32), bad);
756
757 /* new max? */
758 max = ceph_decode_32(p);
759 if (max >= 0) {
760 err = osdmap_set_max_osd(map, max);
761 if (err < 0)
762 goto bad;
763 }
764
765 map->epoch++;
766 map->modified = map->modified;
767 if (newcrush) {
768 if (map->crush)
769 crush_destroy(map->crush);
770 map->crush = newcrush;
771 newcrush = NULL;
772 }
773
774 /* new_pool */
775 ceph_decode_32_safe(p, end, len, bad);
776 while (len--) {
777 __u8 ev;
778 struct ceph_pg_pool_info *pi;
779
780 ceph_decode_32_safe(p, end, pool, bad);
781 ceph_decode_need(p, end, 1 + sizeof(pi->v), bad);
782 ev = ceph_decode_8(p); /* encoding version */
783 if (ev > CEPH_PG_POOL_VERSION) {
784 pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
785 ev, CEPH_PG_POOL_VERSION);
786 goto bad;
787 }
788 pi = __lookup_pg_pool(&map->pg_pools, pool);
789 if (!pi) {
790 pi = kzalloc(sizeof(*pi), GFP_NOFS);
791 if (!pi) {
792 err = -ENOMEM;
793 goto bad;
794 }
795 pi->id = pool;
796 __insert_pg_pool(&map->pg_pools, pi);
797 }
798 err = __decode_pool(p, end, pi);
799 if (err < 0)
800 goto bad;
801 }
802 if (version >= 5 && __decode_pool_names(p, end, map) < 0)
803 goto bad;
804
805 /* old_pool */
806 ceph_decode_32_safe(p, end, len, bad);
807 while (len--) {
808 struct ceph_pg_pool_info *pi;
809
810 ceph_decode_32_safe(p, end, pool, bad);
811 pi = __lookup_pg_pool(&map->pg_pools, pool);
812 if (pi)
813 __remove_pg_pool(&map->pg_pools, pi);
814 }
815
816 /* new_up */
817 err = -EINVAL;
818 ceph_decode_32_safe(p, end, len, bad);
819 while (len--) {
820 u32 osd;
821 struct ceph_entity_addr addr;
822 ceph_decode_32_safe(p, end, osd, bad);
823 ceph_decode_copy_safe(p, end, &addr, sizeof(addr), bad);
824 ceph_decode_addr(&addr);
825 pr_info("osd%d up\n", osd);
826 BUG_ON(osd >= map->max_osd);
827 map->osd_state[osd] |= CEPH_OSD_UP;
828 map->osd_addr[osd] = addr;
829 }
830
831 /* new_down */
832 ceph_decode_32_safe(p, end, len, bad);
833 while (len--) {
834 u32 osd;
835 ceph_decode_32_safe(p, end, osd, bad);
836 (*p)++; /* clean flag */
837 pr_info("osd%d down\n", osd);
838 if (osd < map->max_osd)
839 map->osd_state[osd] &= ~CEPH_OSD_UP;
840 }
841
842 /* new_weight */
843 ceph_decode_32_safe(p, end, len, bad);
844 while (len--) {
845 u32 osd, off;
846 ceph_decode_need(p, end, sizeof(u32)*2, bad);
847 osd = ceph_decode_32(p);
848 off = ceph_decode_32(p);
849 pr_info("osd%d weight 0x%x %s\n", osd, off,
850 off == CEPH_OSD_IN ? "(in)" :
851 (off == CEPH_OSD_OUT ? "(out)" : ""));
852 if (osd < map->max_osd)
853 map->osd_weight[osd] = off;
854 }
855
856 /* new_pg_temp */
857 rbp = rb_first(&map->pg_temp);
858 ceph_decode_32_safe(p, end, len, bad);
859 while (len--) {
860 struct ceph_pg_mapping *pg;
861 int j;
862 struct ceph_pg pgid;
863 u32 pglen;
864 ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad);
865 ceph_decode_copy(p, &pgid, sizeof(pgid));
866 pglen = ceph_decode_32(p);
867
868 /* remove any? */
869 while (rbp && pgid_cmp(rb_entry(rbp, struct ceph_pg_mapping,
870 node)->pgid, pgid) <= 0) {
871 struct ceph_pg_mapping *cur =
872 rb_entry(rbp, struct ceph_pg_mapping, node);
873
874 rbp = rb_next(rbp);
875 dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid);
876 rb_erase(&cur->node, &map->pg_temp);
877 kfree(cur);
878 }
879
880 if (pglen) {
881 /* insert */
882 ceph_decode_need(p, end, pglen*sizeof(u32), bad);
883 pg = kmalloc(sizeof(*pg) + sizeof(u32)*pglen, GFP_NOFS);
884 if (!pg) {
885 err = -ENOMEM;
886 goto bad;
887 }
888 pg->pgid = pgid;
889 pg->len = pglen;
890 for (j = 0; j < pglen; j++)
891 pg->osds[j] = ceph_decode_32(p);
892 err = __insert_pg_mapping(pg, &map->pg_temp);
893 if (err) {
894 kfree(pg);
895 goto bad;
896 }
897 dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid,
898 pglen);
899 }
900 }
901 while (rbp) {
902 struct ceph_pg_mapping *cur =
903 rb_entry(rbp, struct ceph_pg_mapping, node);
904
905 rbp = rb_next(rbp);
906 dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid);
907 rb_erase(&cur->node, &map->pg_temp);
908 kfree(cur);
909 }
910
911 /* ignore the rest */
912 *p = end;
913 return map;
914
915 bad:
916 pr_err("corrupt inc osdmap epoch %d off %d (%p of %p-%p)\n",
917 epoch, (int)(*p - start), *p, start, end);
918 print_hex_dump(KERN_DEBUG, "osdmap: ",
919 DUMP_PREFIX_OFFSET, 16, 1,
920 start, end - start, true);
921 if (newcrush)
922 crush_destroy(newcrush);
923 return ERR_PTR(err);
924 }
925
926
927
928
929 /*
930 * calculate file layout from given offset, length.
931 * fill in correct oid, logical length, and object extent
932 * offset, length.
933 *
934 * for now, we write only a single su, until we can
935 * pass a stride back to the caller.
936 */
937 void ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
938 u64 off, u64 *plen,
939 u64 *ono,
940 u64 *oxoff, u64 *oxlen)
941 {
942 u32 osize = le32_to_cpu(layout->fl_object_size);
943 u32 su = le32_to_cpu(layout->fl_stripe_unit);
944 u32 sc = le32_to_cpu(layout->fl_stripe_count);
945 u32 bl, stripeno, stripepos, objsetno;
946 u32 su_per_object;
947 u64 t, su_offset;
948
949 dout("mapping %llu~%llu osize %u fl_su %u\n", off, *plen,
950 osize, su);
951 su_per_object = osize / su;
952 dout("osize %u / su %u = su_per_object %u\n", osize, su,
953 su_per_object);
954
955 BUG_ON((su & ~PAGE_MASK) != 0);
956 /* bl = *off / su; */
957 t = off;
958 do_div(t, su);
959 bl = t;
960 dout("off %llu / su %u = bl %u\n", off, su, bl);
961
962 stripeno = bl / sc;
963 stripepos = bl % sc;
964 objsetno = stripeno / su_per_object;
965
966 *ono = objsetno * sc + stripepos;
967 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned)*ono);
968
969 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
970 t = off;
971 su_offset = do_div(t, su);
972 *oxoff = su_offset + (stripeno % su_per_object) * su;
973
974 /*
975 * Calculate the length of the extent being written to the selected
976 * object. This is the minimum of the full length requested (plen) or
977 * the remainder of the current stripe being written to.
978 */
979 *oxlen = min_t(u64, *plen, su - su_offset);
980 *plen = *oxlen;
981
982 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
983 }
984 EXPORT_SYMBOL(ceph_calc_file_object_mapping);
985
986 /*
987 * calculate an object layout (i.e. pgid) from an oid,
988 * file_layout, and osdmap
989 */
990 int ceph_calc_object_layout(struct ceph_object_layout *ol,
991 const char *oid,
992 struct ceph_file_layout *fl,
993 struct ceph_osdmap *osdmap)
994 {
995 unsigned num, num_mask;
996 struct ceph_pg pgid;
997 s32 preferred = (s32)le32_to_cpu(fl->fl_pg_preferred);
998 int poolid = le32_to_cpu(fl->fl_pg_pool);
999 struct ceph_pg_pool_info *pool;
1000 unsigned ps;
1001
1002 BUG_ON(!osdmap);
1003
1004 pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
1005 if (!pool)
1006 return -EIO;
1007 ps = ceph_str_hash(pool->v.object_hash, oid, strlen(oid));
1008 if (preferred >= 0) {
1009 ps += preferred;
1010 num = le32_to_cpu(pool->v.lpg_num);
1011 num_mask = pool->lpg_num_mask;
1012 } else {
1013 num = le32_to_cpu(pool->v.pg_num);
1014 num_mask = pool->pg_num_mask;
1015 }
1016
1017 pgid.ps = cpu_to_le16(ps);
1018 pgid.preferred = cpu_to_le16(preferred);
1019 pgid.pool = fl->fl_pg_pool;
1020 if (preferred >= 0)
1021 dout("calc_object_layout '%s' pgid %d.%xp%d\n", oid, poolid, ps,
1022 (int)preferred);
1023 else
1024 dout("calc_object_layout '%s' pgid %d.%x\n", oid, poolid, ps);
1025
1026 ol->ol_pgid = pgid;
1027 ol->ol_stripe_unit = fl->fl_object_stripe_unit;
1028 return 0;
1029 }
1030 EXPORT_SYMBOL(ceph_calc_object_layout);
1031
1032 /*
1033 * Calculate raw osd vector for the given pgid. Return pointer to osd
1034 * array, or NULL on failure.
1035 */
1036 static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
1037 int *osds, int *num)
1038 {
1039 struct ceph_pg_mapping *pg;
1040 struct ceph_pg_pool_info *pool;
1041 int ruleno;
1042 unsigned poolid, ps, pps;
1043 int preferred;
1044
1045 /* pg_temp? */
1046 pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
1047 if (pg) {
1048 *num = pg->len;
1049 return pg->osds;
1050 }
1051
1052 /* crush */
1053 poolid = le32_to_cpu(pgid.pool);
1054 ps = le16_to_cpu(pgid.ps);
1055 preferred = (s16)le16_to_cpu(pgid.preferred);
1056
1057 /* don't forcefeed bad device ids to crush */
1058 if (preferred >= osdmap->max_osd ||
1059 preferred >= osdmap->crush->max_devices)
1060 preferred = -1;
1061
1062 pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
1063 if (!pool)
1064 return NULL;
1065 ruleno = crush_find_rule(osdmap->crush, pool->v.crush_ruleset,
1066 pool->v.type, pool->v.size);
1067 if (ruleno < 0) {
1068 pr_err("no crush rule pool %d ruleset %d type %d size %d\n",
1069 poolid, pool->v.crush_ruleset, pool->v.type,
1070 pool->v.size);
1071 return NULL;
1072 }
1073
1074 if (preferred >= 0)
1075 pps = ceph_stable_mod(ps,
1076 le32_to_cpu(pool->v.lpgp_num),
1077 pool->lpgp_num_mask);
1078 else
1079 pps = ceph_stable_mod(ps,
1080 le32_to_cpu(pool->v.pgp_num),
1081 pool->pgp_num_mask);
1082 pps += poolid;
1083 *num = crush_do_rule(osdmap->crush, ruleno, pps, osds,
1084 min_t(int, pool->v.size, *num),
1085 preferred, osdmap->osd_weight);
1086 return osds;
1087 }
1088
1089 /*
1090 * Return acting set for given pgid.
1091 */
1092 int ceph_calc_pg_acting(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
1093 int *acting)
1094 {
1095 int rawosds[CEPH_PG_MAX_SIZE], *osds;
1096 int i, o, num = CEPH_PG_MAX_SIZE;
1097
1098 osds = calc_pg_raw(osdmap, pgid, rawosds, &num);
1099 if (!osds)
1100 return -1;
1101
1102 /* primary is first up osd */
1103 o = 0;
1104 for (i = 0; i < num; i++)
1105 if (ceph_osd_is_up(osdmap, osds[i]))
1106 acting[o++] = osds[i];
1107 return o;
1108 }
1109
1110 /*
1111 * Return primary osd for given pgid, or -1 if none.
1112 */
1113 int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid)
1114 {
1115 int rawosds[CEPH_PG_MAX_SIZE], *osds;
1116 int i, num = CEPH_PG_MAX_SIZE;
1117
1118 osds = calc_pg_raw(osdmap, pgid, rawosds, &num);
1119 if (!osds)
1120 return -1;
1121
1122 /* primary is first up osd */
1123 for (i = 0; i < num; i++)
1124 if (ceph_osd_is_up(osdmap, osds[i]))
1125 return osds[i];
1126 return -1;
1127 }
1128 EXPORT_SYMBOL(ceph_calc_pg_primary);
Linus' kernel tree