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-rw-r--r--fs/ceph/osdmap.c1062
1 files changed, 1062 insertions, 0 deletions
diff --git a/fs/ceph/osdmap.c b/fs/ceph/osdmap.c
new file mode 100644
index 000000000000..2e2c15eed82a
--- /dev/null
+++ b/fs/ceph/osdmap.c
@@ -0,0 +1,1062 @@
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
13char *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 }
34done:
35 return str;
36}
37
38/* maps */
39
40static 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 */
53static 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 */
67static 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;
74bad:
75 return -EINVAL;
76}
77
78static 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;
95bad:
96 return -EINVAL;
97}
98
99static 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;
112bad:
113 return -EINVAL;
114}
115
116static 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;
133bad:
134 return -EINVAL;
135}
136
137static 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
309badmem:
310 err = -ENOMEM;
311bad:
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 */
321static 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
333static 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
358static 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 */
381static 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
403static 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
420static 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
427void __decode_pool(void **p, struct ceph_pg_pool_info *pi)
428{
429 ceph_decode_copy(p, &pi->v, sizeof(pi->v));
430 calc_pg_masks(pi);
431 *p += le32_to_cpu(pi->v.num_snaps) * sizeof(u64);
432 *p += le32_to_cpu(pi->v.num_removed_snap_intervals) * sizeof(u64) * 2;
433}
434
435static int __decode_pool_names(void **p, void *end, struct ceph_osdmap *map)
436{
437 struct ceph_pg_pool_info *pi;
438 u32 num, len, pool;
439
440 ceph_decode_32_safe(p, end, num, bad);
441 dout(" %d pool names\n", num);
442 while (num--) {
443 ceph_decode_32_safe(p, end, pool, bad);
444 ceph_decode_32_safe(p, end, len, bad);
445 dout(" pool %d len %d\n", pool, len);
446 pi = __lookup_pg_pool(&map->pg_pools, pool);
447 if (pi) {
448 kfree(pi->name);
449 pi->name = kmalloc(len + 1, GFP_NOFS);
450 if (pi->name) {
451 memcpy(pi->name, *p, len);
452 pi->name[len] = '\0';
453 dout(" name is %s\n", pi->name);
454 }
455 }
456 *p += len;
457 }
458 return 0;
459
460bad:
461 return -EINVAL;
462}
463
464/*
465 * osd map
466 */
467void ceph_osdmap_destroy(struct ceph_osdmap *map)
468{
469 dout("osdmap_destroy %p\n", map);
470 if (map->crush)
471 crush_destroy(map->crush);
472 while (!RB_EMPTY_ROOT(&map->pg_temp)) {
473 struct ceph_pg_mapping *pg =
474 rb_entry(rb_first(&map->pg_temp),
475 struct ceph_pg_mapping, node);
476 rb_erase(&pg->node, &map->pg_temp);
477 kfree(pg);
478 }
479 while (!RB_EMPTY_ROOT(&map->pg_pools)) {
480 struct ceph_pg_pool_info *pi =
481 rb_entry(rb_first(&map->pg_pools),
482 struct ceph_pg_pool_info, node);
483 __remove_pg_pool(&map->pg_pools, pi);
484 }
485 kfree(map->osd_state);
486 kfree(map->osd_weight);
487 kfree(map->osd_addr);
488 kfree(map);
489}
490
491/*
492 * adjust max osd value. reallocate arrays.
493 */
494static int osdmap_set_max_osd(struct ceph_osdmap *map, int max)
495{
496 u8 *state;
497 struct ceph_entity_addr *addr;
498 u32 *weight;
499
500 state = kcalloc(max, sizeof(*state), GFP_NOFS);
501 addr = kcalloc(max, sizeof(*addr), GFP_NOFS);
502 weight = kcalloc(max, sizeof(*weight), GFP_NOFS);
503 if (state == NULL || addr == NULL || weight == NULL) {
504 kfree(state);
505 kfree(addr);
506 kfree(weight);
507 return -ENOMEM;
508 }
509
510 /* copy old? */
511 if (map->osd_state) {
512 memcpy(state, map->osd_state, map->max_osd*sizeof(*state));
513 memcpy(addr, map->osd_addr, map->max_osd*sizeof(*addr));
514 memcpy(weight, map->osd_weight, map->max_osd*sizeof(*weight));
515 kfree(map->osd_state);
516 kfree(map->osd_addr);
517 kfree(map->osd_weight);
518 }
519
520 map->osd_state = state;
521 map->osd_weight = weight;
522 map->osd_addr = addr;
523 map->max_osd = max;
524 return 0;
525}
526
527/*
528 * decode a full map.
529 */
530struct ceph_osdmap *osdmap_decode(void **p, void *end)
531{
532 struct ceph_osdmap *map;
533 u16 version;
534 u32 len, max, i;
535 u8 ev;
536 int err = -EINVAL;
537 void *start = *p;
538 struct ceph_pg_pool_info *pi;
539
540 dout("osdmap_decode %p to %p len %d\n", *p, end, (int)(end - *p));
541
542 map = kzalloc(sizeof(*map), GFP_NOFS);
543 if (map == NULL)
544 return ERR_PTR(-ENOMEM);
545 map->pg_temp = RB_ROOT;
546
547 ceph_decode_16_safe(p, end, version, bad);
548 if (version > CEPH_OSDMAP_VERSION) {
549 pr_warning("got unknown v %d > %d of osdmap\n", version,
550 CEPH_OSDMAP_VERSION);
551 goto bad;
552 }
553
554 ceph_decode_need(p, end, 2*sizeof(u64)+6*sizeof(u32), bad);
555 ceph_decode_copy(p, &map->fsid, sizeof(map->fsid));
556 map->epoch = ceph_decode_32(p);
557 ceph_decode_copy(p, &map->created, sizeof(map->created));
558 ceph_decode_copy(p, &map->modified, sizeof(map->modified));
559
560 ceph_decode_32_safe(p, end, max, bad);
561 while (max--) {
562 ceph_decode_need(p, end, 4 + 1 + sizeof(pi->v), bad);
563 pi = kzalloc(sizeof(*pi), GFP_NOFS);
564 if (!pi)
565 goto bad;
566 pi->id = ceph_decode_32(p);
567 ev = ceph_decode_8(p); /* encoding version */
568 if (ev > CEPH_PG_POOL_VERSION) {
569 pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
570 ev, CEPH_PG_POOL_VERSION);
571 goto bad;
572 }
573 __decode_pool(p, pi);
574 __insert_pg_pool(&map->pg_pools, pi);
575 }
576
577 if (version >= 5 && __decode_pool_names(p, end, map) < 0)
578 goto bad;
579
580 ceph_decode_32_safe(p, end, map->pool_max, bad);
581
582 ceph_decode_32_safe(p, end, map->flags, bad);
583
584 max = ceph_decode_32(p);
585
586 /* (re)alloc osd arrays */
587 err = osdmap_set_max_osd(map, max);
588 if (err < 0)
589 goto bad;
590 dout("osdmap_decode max_osd = %d\n", map->max_osd);
591
592 /* osds */
593 err = -EINVAL;
594 ceph_decode_need(p, end, 3*sizeof(u32) +
595 map->max_osd*(1 + sizeof(*map->osd_weight) +
596 sizeof(*map->osd_addr)), bad);
597 *p += 4; /* skip length field (should match max) */
598 ceph_decode_copy(p, map->osd_state, map->max_osd);
599
600 *p += 4; /* skip length field (should match max) */
601 for (i = 0; i < map->max_osd; i++)
602 map->osd_weight[i] = ceph_decode_32(p);
603
604 *p += 4; /* skip length field (should match max) */
605 ceph_decode_copy(p, map->osd_addr, map->max_osd*sizeof(*map->osd_addr));
606 for (i = 0; i < map->max_osd; i++)
607 ceph_decode_addr(&map->osd_addr[i]);
608
609 /* pg_temp */
610 ceph_decode_32_safe(p, end, len, bad);
611 for (i = 0; i < len; i++) {
612 int n, j;
613 struct ceph_pg pgid;
614 struct ceph_pg_mapping *pg;
615
616 ceph_decode_need(p, end, sizeof(u32) + sizeof(u64), bad);
617 ceph_decode_copy(p, &pgid, sizeof(pgid));
618 n = ceph_decode_32(p);
619 ceph_decode_need(p, end, n * sizeof(u32), bad);
620 err = -ENOMEM;
621 pg = kmalloc(sizeof(*pg) + n*sizeof(u32), GFP_NOFS);
622 if (!pg)
623 goto bad;
624 pg->pgid = pgid;
625 pg->len = n;
626 for (j = 0; j < n; j++)
627 pg->osds[j] = ceph_decode_32(p);
628
629 err = __insert_pg_mapping(pg, &map->pg_temp);
630 if (err)
631 goto bad;
632 dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid, len);
633 }
634
635 /* crush */
636 ceph_decode_32_safe(p, end, len, bad);
637 dout("osdmap_decode crush len %d from off 0x%x\n", len,
638 (int)(*p - start));
639 ceph_decode_need(p, end, len, bad);
640 map->crush = crush_decode(*p, end);
641 *p += len;
642 if (IS_ERR(map->crush)) {
643 err = PTR_ERR(map->crush);
644 map->crush = NULL;
645 goto bad;
646 }
647
648 /* ignore the rest of the map */
649 *p = end;
650
651 dout("osdmap_decode done %p %p\n", *p, end);
652 return map;
653
654bad:
655 dout("osdmap_decode fail\n");
656 ceph_osdmap_destroy(map);
657 return ERR_PTR(err);
658}
659
660/*
661 * decode and apply an incremental map update.
662 */
663struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
664 struct ceph_osdmap *map,
665 struct ceph_messenger *msgr)
666{
667 struct crush_map *newcrush = NULL;
668 struct ceph_fsid fsid;
669 u32 epoch = 0;
670 struct ceph_timespec modified;
671 u32 len, pool;
672 __s32 new_pool_max, new_flags, max;
673 void *start = *p;
674 int err = -EINVAL;
675 u16 version;
676 struct rb_node *rbp;
677
678 ceph_decode_16_safe(p, end, version, bad);
679 if (version > CEPH_OSDMAP_INC_VERSION) {
680 pr_warning("got unknown v %d > %d of inc osdmap\n", version,
681 CEPH_OSDMAP_INC_VERSION);
682 goto bad;
683 }
684
685 ceph_decode_need(p, end, sizeof(fsid)+sizeof(modified)+2*sizeof(u32),
686 bad);
687 ceph_decode_copy(p, &fsid, sizeof(fsid));
688 epoch = ceph_decode_32(p);
689 BUG_ON(epoch != map->epoch+1);
690 ceph_decode_copy(p, &modified, sizeof(modified));
691 new_pool_max = ceph_decode_32(p);
692 new_flags = ceph_decode_32(p);
693
694 /* full map? */
695 ceph_decode_32_safe(p, end, len, bad);
696 if (len > 0) {
697 dout("apply_incremental full map len %d, %p to %p\n",
698 len, *p, end);
699 return osdmap_decode(p, min(*p+len, end));
700 }
701
702 /* new crush? */
703 ceph_decode_32_safe(p, end, len, bad);
704 if (len > 0) {
705 dout("apply_incremental new crush map len %d, %p to %p\n",
706 len, *p, end);
707 newcrush = crush_decode(*p, min(*p+len, end));
708 if (IS_ERR(newcrush))
709 return ERR_PTR(PTR_ERR(newcrush));
710 }
711
712 /* new flags? */
713 if (new_flags >= 0)
714 map->flags = new_flags;
715 if (new_pool_max >= 0)
716 map->pool_max = new_pool_max;
717
718 ceph_decode_need(p, end, 5*sizeof(u32), bad);
719
720 /* new max? */
721 max = ceph_decode_32(p);
722 if (max >= 0) {
723 err = osdmap_set_max_osd(map, max);
724 if (err < 0)
725 goto bad;
726 }
727
728 map->epoch++;
729 map->modified = map->modified;
730 if (newcrush) {
731 if (map->crush)
732 crush_destroy(map->crush);
733 map->crush = newcrush;
734 newcrush = NULL;
735 }
736
737 /* new_pool */
738 ceph_decode_32_safe(p, end, len, bad);
739 while (len--) {
740 __u8 ev;
741 struct ceph_pg_pool_info *pi;
742
743 ceph_decode_32_safe(p, end, pool, bad);
744 ceph_decode_need(p, end, 1 + sizeof(pi->v), bad);
745 ev = ceph_decode_8(p); /* encoding version */
746 if (ev > CEPH_PG_POOL_VERSION) {
747 pr_warning("got unknown v %d > %d of ceph_pg_pool\n",
748 ev, CEPH_PG_POOL_VERSION);
749 goto bad;
750 }
751 pi = __lookup_pg_pool(&map->pg_pools, pool);
752 if (!pi) {
753 pi = kzalloc(sizeof(*pi), GFP_NOFS);
754 if (!pi) {
755 err = -ENOMEM;
756 goto bad;
757 }
758 pi->id = pool;
759 __insert_pg_pool(&map->pg_pools, pi);
760 }
761 __decode_pool(p, pi);
762 }
763 if (version >= 5 && __decode_pool_names(p, end, map) < 0)
764 goto bad;
765
766 /* old_pool */
767 ceph_decode_32_safe(p, end, len, bad);
768 while (len--) {
769 struct ceph_pg_pool_info *pi;
770
771 ceph_decode_32_safe(p, end, pool, bad);
772 pi = __lookup_pg_pool(&map->pg_pools, pool);
773 if (pi)
774 __remove_pg_pool(&map->pg_pools, pi);
775 }
776
777 /* new_up */
778 err = -EINVAL;
779 ceph_decode_32_safe(p, end, len, bad);
780 while (len--) {
781 u32 osd;
782 struct ceph_entity_addr addr;
783 ceph_decode_32_safe(p, end, osd, bad);
784 ceph_decode_copy_safe(p, end, &addr, sizeof(addr), bad);
785 ceph_decode_addr(&addr);
786 pr_info("osd%d up\n", osd);
787 BUG_ON(osd >= map->max_osd);
788 map->osd_state[osd] |= CEPH_OSD_UP;
789 map->osd_addr[osd] = addr;
790 }
791
792 /* new_down */
793 ceph_decode_32_safe(p, end, len, bad);
794 while (len--) {
795 u32 osd;
796 ceph_decode_32_safe(p, end, osd, bad);
797 (*p)++; /* clean flag */
798 pr_info("osd%d down\n", osd);
799 if (osd < map->max_osd)
800 map->osd_state[osd] &= ~CEPH_OSD_UP;
801 }
802
803 /* new_weight */
804 ceph_decode_32_safe(p, end, len, bad);
805 while (len--) {
806 u32 osd, off;
807 ceph_decode_need(p, end, sizeof(u32)*2, bad);
808 osd = ceph_decode_32(p);
809 off = ceph_decode_32(p);
810 pr_info("osd%d weight 0x%x %s\n", osd, off,
811 off == CEPH_OSD_IN ? "(in)" :
812 (off == CEPH_OSD_OUT ? "(out)" : ""));
813 if (osd < map->max_osd)
814 map->osd_weight[osd] = off;
815 }
816
817 /* new_pg_temp */
818 rbp = rb_first(&map->pg_temp);
819 ceph_decode_32_safe(p, end, len, bad);
820 while (len--) {
821 struct ceph_pg_mapping *pg;
822 int j;
823 struct ceph_pg pgid;
824 u32 pglen;
825 ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad);
826 ceph_decode_copy(p, &pgid, sizeof(pgid));
827 pglen = ceph_decode_32(p);
828
829 /* remove any? */
830 while (rbp && pgid_cmp(rb_entry(rbp, struct ceph_pg_mapping,
831 node)->pgid, pgid) <= 0) {
832 struct rb_node *cur = rbp;
833 rbp = rb_next(rbp);
834 dout(" removed pg_temp %llx\n",
835 *(u64 *)&rb_entry(cur, struct ceph_pg_mapping,
836 node)->pgid);
837 rb_erase(cur, &map->pg_temp);
838 }
839
840 if (pglen) {
841 /* insert */
842 ceph_decode_need(p, end, pglen*sizeof(u32), bad);
843 pg = kmalloc(sizeof(*pg) + sizeof(u32)*pglen, GFP_NOFS);
844 if (!pg) {
845 err = -ENOMEM;
846 goto bad;
847 }
848 pg->pgid = pgid;
849 pg->len = pglen;
850 for (j = 0; j < pglen; j++)
851 pg->osds[j] = ceph_decode_32(p);
852 err = __insert_pg_mapping(pg, &map->pg_temp);
853 if (err)
854 goto bad;
855 dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid,
856 pglen);
857 }
858 }
859 while (rbp) {
860 struct rb_node *cur = rbp;
861 rbp = rb_next(rbp);
862 dout(" removed pg_temp %llx\n",
863 *(u64 *)&rb_entry(cur, struct ceph_pg_mapping,
864 node)->pgid);
865 rb_erase(cur, &map->pg_temp);
866 }
867
868 /* ignore the rest */
869 *p = end;
870 return map;
871
872bad:
873 pr_err("corrupt inc osdmap epoch %d off %d (%p of %p-%p)\n",
874 epoch, (int)(*p - start), *p, start, end);
875 print_hex_dump(KERN_DEBUG, "osdmap: ",
876 DUMP_PREFIX_OFFSET, 16, 1,
877 start, end - start, true);
878 if (newcrush)
879 crush_destroy(newcrush);
880 return ERR_PTR(err);
881}
882
883
884
885
886/*
887 * calculate file layout from given offset, length.
888 * fill in correct oid, logical length, and object extent
889 * offset, length.
890 *
891 * for now, we write only a single su, until we can
892 * pass a stride back to the caller.
893 */
894void ceph_calc_file_object_mapping(struct ceph_file_layout *layout,
895 u64 off, u64 *plen,
896 u64 *ono,
897 u64 *oxoff, u64 *oxlen)
898{
899 u32 osize = le32_to_cpu(layout->fl_object_size);
900 u32 su = le32_to_cpu(layout->fl_stripe_unit);
901 u32 sc = le32_to_cpu(layout->fl_stripe_count);
902 u32 bl, stripeno, stripepos, objsetno;
903 u32 su_per_object;
904 u64 t, su_offset;
905
906 dout("mapping %llu~%llu osize %u fl_su %u\n", off, *plen,
907 osize, su);
908 su_per_object = osize / su;
909 dout("osize %u / su %u = su_per_object %u\n", osize, su,
910 su_per_object);
911
912 BUG_ON((su & ~PAGE_MASK) != 0);
913 /* bl = *off / su; */
914 t = off;
915 do_div(t, su);
916 bl = t;
917 dout("off %llu / su %u = bl %u\n", off, su, bl);
918
919 stripeno = bl / sc;
920 stripepos = bl % sc;
921 objsetno = stripeno / su_per_object;
922
923 *ono = objsetno * sc + stripepos;
924 dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned)*ono);
925
926 /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */
927 t = off;
928 su_offset = do_div(t, su);
929 *oxoff = su_offset + (stripeno % su_per_object) * su;
930
931 /*
932 * Calculate the length of the extent being written to the selected
933 * object. This is the minimum of the full length requested (plen) or
934 * the remainder of the current stripe being written to.
935 */
936 *oxlen = min_t(u64, *plen, su - su_offset);
937 *plen = *oxlen;
938
939 dout(" obj extent %llu~%llu\n", *oxoff, *oxlen);
940}
941
942/*
943 * calculate an object layout (i.e. pgid) from an oid,
944 * file_layout, and osdmap
945 */
946int ceph_calc_object_layout(struct ceph_object_layout *ol,
947 const char *oid,
948 struct ceph_file_layout *fl,
949 struct ceph_osdmap *osdmap)
950{
951 unsigned num, num_mask;
952 struct ceph_pg pgid;
953 s32 preferred = (s32)le32_to_cpu(fl->fl_pg_preferred);
954 int poolid = le32_to_cpu(fl->fl_pg_pool);
955 struct ceph_pg_pool_info *pool;
956 unsigned ps;
957
958 BUG_ON(!osdmap);
959
960 pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
961 if (!pool)
962 return -EIO;
963 ps = ceph_str_hash(pool->v.object_hash, oid, strlen(oid));
964 if (preferred >= 0) {
965 ps += preferred;
966 num = le32_to_cpu(pool->v.lpg_num);
967 num_mask = pool->lpg_num_mask;
968 } else {
969 num = le32_to_cpu(pool->v.pg_num);
970 num_mask = pool->pg_num_mask;
971 }
972
973 pgid.ps = cpu_to_le16(ps);
974 pgid.preferred = cpu_to_le16(preferred);
975 pgid.pool = fl->fl_pg_pool;
976 if (preferred >= 0)
977 dout("calc_object_layout '%s' pgid %d.%xp%d\n", oid, poolid, ps,
978 (int)preferred);
979 else
980 dout("calc_object_layout '%s' pgid %d.%x\n", oid, poolid, ps);
981
982 ol->ol_pgid = pgid;
983 ol->ol_stripe_unit = fl->fl_object_stripe_unit;
984 return 0;
985}
986
987/*
988 * Calculate raw osd vector for the given pgid. Return pointer to osd
989 * array, or NULL on failure.
990 */
991static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid,
992 int *osds, int *num)
993{
994 struct ceph_pg_mapping *pg;
995 struct ceph_pg_pool_info *pool;
996 int ruleno;
997 unsigned poolid, ps, pps;
998 int preferred;
999
1000 /* pg_temp? */
1001 pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid);
1002 if (pg) {
1003 *num = pg->len;
1004 return pg->osds;
1005 }
1006
1007 /* crush */
1008 poolid = le32_to_cpu(pgid.pool);
1009 ps = le16_to_cpu(pgid.ps);
1010 preferred = (s16)le16_to_cpu(pgid.preferred);
1011
1012 /* don't forcefeed bad device ids to crush */
1013 if (preferred >= osdmap->max_osd ||
1014 preferred >= osdmap->crush->max_devices)
1015 preferred = -1;
1016
1017 pool = __lookup_pg_pool(&osdmap->pg_pools, poolid);
1018 if (!pool)
1019 return NULL;
1020 ruleno = crush_find_rule(osdmap->crush, pool->v.crush_ruleset,
1021 pool->v.type, pool->v.size);
1022 if (ruleno < 0) {
1023 pr_err("no crush rule pool %d type %d size %d\n",
1024 poolid, pool->v.type, pool->v.size);
1025 return NULL;
1026 }
1027
1028 if (preferred >= 0)
1029 pps = ceph_stable_mod(ps,
1030 le32_to_cpu(pool->v.lpgp_num),
1031 pool->lpgp_num_mask);
1032 else
1033 pps = ceph_stable_mod(ps,
1034 le32_to_cpu(pool->v.pgp_num),
1035 pool->pgp_num_mask);
1036 pps += poolid;
1037 *num = crush_do_rule(osdmap->crush, ruleno, pps, osds,
1038 min_t(int, pool->v.size, *num),
1039 preferred, osdmap->osd_weight);
1040 return osds;
1041}
1042
1043/*
1044 * Return primary osd for given pgid, or -1 if none.
1045 */
1046int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid)
1047{
1048 int rawosds[10], *osds;
1049 int i, num = ARRAY_SIZE(rawosds);
1050
1051 osds = calc_pg_raw(osdmap, pgid, rawosds, &num);
1052 if (!osds)
1053 return -1;
1054
1055 /* primary is first up osd */
1056 for (i = 0; i < num; i++)
1057 if (ceph_osd_is_up(osdmap, osds[i])) {
1058 return osds[i];
1059 break;
1060 }
1061 return -1;
1062}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-22 21:45:08 -0500