Commit | Line | Data |
---|---|---|
f24e9980 | 1 | |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
5a0e3ad6 | 3 | |
3d14c5d2 | 4 | #include <linux/module.h> |
5a0e3ad6 | 5 | #include <linux/slab.h> |
f24e9980 SW |
6 | #include <asm/div64.h> |
7 | ||
3d14c5d2 YS |
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> | |
f24e9980 SW |
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); | |
c89136ea | 73 | b->item_weight = ceph_decode_32(p); |
f24e9980 SW |
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++) { | |
c89136ea SW |
92 | b->item_weights[j] = ceph_decode_32(p); |
93 | b->sum_weights[j] = ceph_decode_32(p); | |
f24e9980 SW |
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++) | |
c89136ea | 111 | b->node_weights[j] = ceph_decode_32(p); |
f24e9980 SW |
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++) { | |
c89136ea SW |
130 | b->item_weights[j] = ceph_decode_32(p); |
131 | b->straws[j] = ceph_decode_32(p); | |
f24e9980 SW |
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); | |
c89136ea | 154 | magic = ceph_decode_32(p); |
f24e9980 SW |
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 | } | |
c89136ea SW |
160 | c->max_buckets = ceph_decode_32(p); |
161 | c->max_rules = ceph_decode_32(p); | |
162 | c->max_devices = ceph_decode_32(p); | |
f24e9980 SW |
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: | |
30dc6381 | 206 | err = -EINVAL; |
f24e9980 SW |
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); | |
c89136ea SW |
215 | b->id = ceph_decode_32(p); |
216 | b->type = ceph_decode_16(p); | |
fb690390 SW |
217 | b->alg = ceph_decode_8(p); |
218 | b->hash = ceph_decode_8(p); | |
c89136ea SW |
219 | b->weight = ceph_decode_32(p); |
220 | b->size = ceph_decode_32(p); | |
f24e9980 SW |
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++) | |
c89136ea | 235 | b->items[j] = ceph_decode_32(p); |
f24e9980 SW |
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 | |
30dc6381 | 285 | err = -EINVAL; |
f24e9980 SW |
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++) { | |
c89136ea SW |
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); | |
f24e9980 SW |
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 | ||
f24e9980 | 318 | /* |
9794b146 SW |
319 | * rbtree of pg_mapping for handling pg_temp (explicit mapping of pgid |
320 | * to a set of osds) | |
f24e9980 | 321 | */ |
51042122 SW |
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 | ||
991abb6e SW |
334 | static int __insert_pg_mapping(struct ceph_pg_mapping *new, |
335 | struct rb_root *root) | |
f24e9980 SW |
336 | { |
337 | struct rb_node **p = &root->rb_node; | |
338 | struct rb_node *parent = NULL; | |
339 | struct ceph_pg_mapping *pg = NULL; | |
51042122 | 340 | int c; |
f24e9980 SW |
341 | |
342 | while (*p) { | |
343 | parent = *p; | |
344 | pg = rb_entry(parent, struct ceph_pg_mapping, node); | |
51042122 SW |
345 | c = pgid_cmp(new->pgid, pg->pgid); |
346 | if (c < 0) | |
f24e9980 | 347 | p = &(*p)->rb_left; |
51042122 | 348 | else if (c > 0) |
f24e9980 SW |
349 | p = &(*p)->rb_right; |
350 | else | |
991abb6e | 351 | return -EEXIST; |
f24e9980 SW |
352 | } |
353 | ||
354 | rb_link_node(&new->node, parent, p); | |
355 | rb_insert_color(&new->node, root); | |
991abb6e | 356 | return 0; |
f24e9980 SW |
357 | } |
358 | ||
9794b146 SW |
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 | ||
4fc51be8 SW |
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 | ||
7669a2c9 YS |
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 | } | |
3d14c5d2 | 433 | EXPORT_SYMBOL(ceph_pg_poolid_by_name); |
7669a2c9 | 434 | |
2844a76a SW |
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 | ||
73a7e693 | 442 | static int __decode_pool(void **p, void *end, struct ceph_pg_pool_info *pi) |
efd7576b | 443 | { |
73a7e693 SW |
444 | unsigned n, m; |
445 | ||
efd7576b SW |
446 | ceph_decode_copy(p, &pi->v, sizeof(pi->v)); |
447 | calc_pg_masks(pi); | |
73a7e693 SW |
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 | ||
efd7576b | 461 | *p += le32_to_cpu(pi->v.num_removed_snap_intervals) * sizeof(u64) * 2; |
73a7e693 SW |
462 | return 0; |
463 | ||
464 | bad: | |
465 | return -EINVAL; | |
efd7576b SW |
466 | } |
467 | ||
2844a76a SW |
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 | ||
f24e9980 SW |
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; | |
361be860 | 568 | u8 ev; |
f24e9980 SW |
569 | int err = -EINVAL; |
570 | void *start = *p; | |
4fc51be8 | 571 | struct ceph_pg_pool_info *pi; |
f24e9980 SW |
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); | |
02f90c61 SW |
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 | } | |
f24e9980 SW |
586 | |
587 | ceph_decode_need(p, end, 2*sizeof(u64)+6*sizeof(u32), bad); | |
588 | ceph_decode_copy(p, &map->fsid, sizeof(map->fsid)); | |
c89136ea | 589 | map->epoch = ceph_decode_32(p); |
f24e9980 SW |
590 | ceph_decode_copy(p, &map->created, sizeof(map->created)); |
591 | ceph_decode_copy(p, &map->modified, sizeof(map->modified)); | |
592 | ||
f24e9980 SW |
593 | ceph_decode_32_safe(p, end, max, bad); |
594 | while (max--) { | |
4fc51be8 | 595 | ceph_decode_need(p, end, 4 + 1 + sizeof(pi->v), bad); |
2844a76a | 596 | pi = kzalloc(sizeof(*pi), GFP_NOFS); |
4fc51be8 | 597 | if (!pi) |
f24e9980 | 598 | goto bad; |
4fc51be8 | 599 | pi->id = ceph_decode_32(p); |
361be860 | 600 | ev = ceph_decode_8(p); /* encoding version */ |
02f90c61 SW |
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); | |
b0bbb0be | 604 | kfree(pi); |
02f90c61 SW |
605 | goto bad; |
606 | } | |
73a7e693 SW |
607 | err = __decode_pool(p, end, pi); |
608 | if (err < 0) | |
609 | goto bad; | |
4fc51be8 | 610 | __insert_pg_pool(&map->pg_pools, pi); |
f24e9980 | 611 | } |
2844a76a SW |
612 | |
613 | if (version >= 5 && __decode_pool_names(p, end, map) < 0) | |
614 | goto bad; | |
615 | ||
4fc51be8 | 616 | ceph_decode_32_safe(p, end, map->pool_max, bad); |
f24e9980 SW |
617 | |
618 | ceph_decode_32_safe(p, end, map->flags, bad); | |
619 | ||
c89136ea | 620 | max = ceph_decode_32(p); |
f24e9980 SW |
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++) | |
c89136ea | 638 | map->osd_weight[i] = ceph_decode_32(p); |
f24e9980 SW |
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)); | |
63f2d211 SW |
642 | for (i = 0; i < map->max_osd; i++) |
643 | ceph_decode_addr(&map->osd_addr[i]); | |
f24e9980 SW |
644 | |
645 | /* pg_temp */ | |
646 | ceph_decode_32_safe(p, end, len, bad); | |
647 | for (i = 0; i < len; i++) { | |
648 | int n, j; | |
51042122 | 649 | struct ceph_pg pgid; |
f24e9980 SW |
650 | struct ceph_pg_mapping *pg; |
651 | ||
652 | ceph_decode_need(p, end, sizeof(u32) + sizeof(u64), bad); | |
51042122 | 653 | ceph_decode_copy(p, &pgid, sizeof(pgid)); |
c89136ea | 654 | n = ceph_decode_32(p); |
f24e9980 | 655 | ceph_decode_need(p, end, n * sizeof(u32), bad); |
30dc6381 | 656 | err = -ENOMEM; |
f24e9980 | 657 | pg = kmalloc(sizeof(*pg) + n*sizeof(u32), GFP_NOFS); |
30dc6381 | 658 | if (!pg) |
f24e9980 | 659 | goto bad; |
f24e9980 SW |
660 | pg->pgid = pgid; |
661 | pg->len = n; | |
662 | for (j = 0; j < n; j++) | |
c89136ea | 663 | pg->osds[j] = ceph_decode_32(p); |
f24e9980 | 664 | |
991abb6e SW |
665 | err = __insert_pg_mapping(pg, &map->pg_temp); |
666 | if (err) | |
667 | goto bad; | |
51042122 | 668 | dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid, len); |
f24e9980 SW |
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 | { | |
f24e9980 SW |
703 | struct crush_map *newcrush = NULL; |
704 | struct ceph_fsid fsid; | |
705 | u32 epoch = 0; | |
706 | struct ceph_timespec modified; | |
707 | u32 len, pool; | |
4fc51be8 | 708 | __s32 new_pool_max, new_flags, max; |
f24e9980 SW |
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); | |
02f90c61 SW |
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 | } | |
f24e9980 SW |
720 | |
721 | ceph_decode_need(p, end, sizeof(fsid)+sizeof(modified)+2*sizeof(u32), | |
722 | bad); | |
723 | ceph_decode_copy(p, &fsid, sizeof(fsid)); | |
c89136ea | 724 | epoch = ceph_decode_32(p); |
f24e9980 SW |
725 | BUG_ON(epoch != map->epoch+1); |
726 | ceph_decode_copy(p, &modified, sizeof(modified)); | |
4fc51be8 | 727 | new_pool_max = ceph_decode_32(p); |
c89136ea | 728 | new_flags = ceph_decode_32(p); |
f24e9980 SW |
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); | |
30dc6381 | 735 | return osdmap_decode(p, min(*p+len, end)); |
f24e9980 SW |
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)) | |
7e34bc52 | 745 | return ERR_CAST(newcrush); |
cebc5be6 | 746 | *p += len; |
f24e9980 SW |
747 | } |
748 | ||
749 | /* new flags? */ | |
750 | if (new_flags >= 0) | |
751 | map->flags = new_flags; | |
4fc51be8 SW |
752 | if (new_pool_max >= 0) |
753 | map->pool_max = new_pool_max; | |
f24e9980 SW |
754 | |
755 | ceph_decode_need(p, end, 5*sizeof(u32), bad); | |
756 | ||
757 | /* new max? */ | |
c89136ea | 758 | max = ceph_decode_32(p); |
f24e9980 SW |
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--) { | |
361be860 | 777 | __u8 ev; |
4fc51be8 | 778 | struct ceph_pg_pool_info *pi; |
361be860 | 779 | |
f24e9980 | 780 | ceph_decode_32_safe(p, end, pool, bad); |
4fc51be8 | 781 | ceph_decode_need(p, end, 1 + sizeof(pi->v), bad); |
361be860 | 782 | ev = ceph_decode_8(p); /* encoding version */ |
02f90c61 SW |
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 | } | |
4fc51be8 SW |
788 | pi = __lookup_pg_pool(&map->pg_pools, pool); |
789 | if (!pi) { | |
2844a76a | 790 | pi = kzalloc(sizeof(*pi), GFP_NOFS); |
4fc51be8 SW |
791 | if (!pi) { |
792 | err = -ENOMEM; | |
793 | goto bad; | |
794 | } | |
795 | pi->id = pool; | |
796 | __insert_pg_pool(&map->pg_pools, pi); | |
797 | } | |
73a7e693 SW |
798 | err = __decode_pool(p, end, pi); |
799 | if (err < 0) | |
800 | goto bad; | |
f24e9980 | 801 | } |
2844a76a SW |
802 | if (version >= 5 && __decode_pool_names(p, end, map) < 0) |
803 | goto bad; | |
f24e9980 | 804 | |
4fc51be8 | 805 | /* old_pool */ |
f24e9980 | 806 | ceph_decode_32_safe(p, end, len, bad); |
4fc51be8 SW |
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); | |
2844a76a SW |
812 | if (pi) |
813 | __remove_pg_pool(&map->pg_pools, pi); | |
4fc51be8 | 814 | } |
f24e9980 SW |
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); | |
63f2d211 | 824 | ceph_decode_addr(&addr); |
f24e9980 SW |
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 */ | |
1bdb70e5 | 837 | pr_info("osd%d down\n", osd); |
f24e9980 SW |
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); | |
c89136ea SW |
847 | osd = ceph_decode_32(p); |
848 | off = ceph_decode_32(p); | |
f24e9980 SW |
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; | |
51042122 | 862 | struct ceph_pg pgid; |
f24e9980 SW |
863 | u32 pglen; |
864 | ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad); | |
51042122 | 865 | ceph_decode_copy(p, &pgid, sizeof(pgid)); |
c89136ea | 866 | pglen = ceph_decode_32(p); |
f24e9980 SW |
867 | |
868 | /* remove any? */ | |
51042122 SW |
869 | while (rbp && pgid_cmp(rb_entry(rbp, struct ceph_pg_mapping, |
870 | node)->pgid, pgid) <= 0) { | |
bc4fdca8 SW |
871 | struct ceph_pg_mapping *cur = |
872 | rb_entry(rbp, struct ceph_pg_mapping, node); | |
213c99ee | 873 | |
f24e9980 | 874 | rbp = rb_next(rbp); |
bc4fdca8 SW |
875 | dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid); |
876 | rb_erase(&cur->node, &map->pg_temp); | |
877 | kfree(cur); | |
f24e9980 SW |
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; | |
7067f797 | 890 | for (j = 0; j < pglen; j++) |
c89136ea | 891 | pg->osds[j] = ceph_decode_32(p); |
991abb6e | 892 | err = __insert_pg_mapping(pg, &map->pg_temp); |
bc4fdca8 SW |
893 | if (err) { |
894 | kfree(pg); | |
991abb6e | 895 | goto bad; |
bc4fdca8 | 896 | } |
51042122 SW |
897 | dout(" added pg_temp %llx len %d\n", *(u64 *)&pgid, |
898 | pglen); | |
f24e9980 SW |
899 | } |
900 | } | |
901 | while (rbp) { | |
bc4fdca8 SW |
902 | struct ceph_pg_mapping *cur = |
903 | rb_entry(rbp, struct ceph_pg_mapping, node); | |
904 | ||
f24e9980 | 905 | rbp = rb_next(rbp); |
bc4fdca8 SW |
906 | dout(" removed pg_temp %llx\n", *(u64 *)&cur->pgid); |
907 | rb_erase(&cur->node, &map->pg_temp); | |
908 | kfree(cur); | |
f24e9980 SW |
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); | |
9ec7cab1 SW |
918 | print_hex_dump(KERN_DEBUG, "osdmap: ", |
919 | DUMP_PREFIX_OFFSET, 16, 1, | |
920 | start, end - start, true); | |
f24e9980 SW |
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, | |
645a1025 | 939 | u64 *ono, |
f24e9980 SW |
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; | |
ff1d1f71 | 947 | u64 t, su_offset; |
f24e9980 SW |
948 | |
949 | dout("mapping %llu~%llu osize %u fl_su %u\n", off, *plen, | |
950 | osize, su); | |
35e054a6 | 951 | su_per_object = osize / su; |
f24e9980 SW |
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 | ||
645a1025 SW |
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 */ | |
f24e9980 | 970 | t = off; |
ff1d1f71 NW |
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); | |
f24e9980 SW |
980 | *plen = *oxlen; |
981 | ||
982 | dout(" obj extent %llu~%llu\n", *oxoff, *oxlen); | |
983 | } | |
3d14c5d2 | 984 | EXPORT_SYMBOL(ceph_calc_file_object_mapping); |
f24e9980 SW |
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; | |
51042122 | 996 | struct ceph_pg pgid; |
f24e9980 SW |
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; | |
51042122 | 1000 | unsigned ps; |
f24e9980 | 1001 | |
30dc6381 | 1002 | BUG_ON(!osdmap); |
f24e9980 | 1003 | |
4fc51be8 SW |
1004 | pool = __lookup_pg_pool(&osdmap->pg_pools, poolid); |
1005 | if (!pool) | |
1006 | return -EIO; | |
1654dd0c | 1007 | ps = ceph_str_hash(pool->v.object_hash, oid, strlen(oid)); |
f24e9980 | 1008 | if (preferred >= 0) { |
51042122 | 1009 | ps += preferred; |
f24e9980 SW |
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 | ||
51042122 SW |
1017 | pgid.ps = cpu_to_le16(ps); |
1018 | pgid.preferred = cpu_to_le16(preferred); | |
1019 | pgid.pool = fl->fl_pg_pool; | |
f24e9980 | 1020 | if (preferred >= 0) |
51042122 SW |
1021 | dout("calc_object_layout '%s' pgid %d.%xp%d\n", oid, poolid, ps, |
1022 | (int)preferred); | |
f24e9980 | 1023 | else |
51042122 | 1024 | dout("calc_object_layout '%s' pgid %d.%x\n", oid, poolid, ps); |
f24e9980 | 1025 | |
51042122 | 1026 | ol->ol_pgid = pgid; |
f24e9980 | 1027 | ol->ol_stripe_unit = fl->fl_object_stripe_unit; |
f24e9980 SW |
1028 | return 0; |
1029 | } | |
3d14c5d2 | 1030 | EXPORT_SYMBOL(ceph_calc_object_layout); |
f24e9980 SW |
1031 | |
1032 | /* | |
1033 | * Calculate raw osd vector for the given pgid. Return pointer to osd | |
1034 | * array, or NULL on failure. | |
1035 | */ | |
51042122 | 1036 | static int *calc_pg_raw(struct ceph_osdmap *osdmap, struct ceph_pg pgid, |
f24e9980 SW |
1037 | int *osds, int *num) |
1038 | { | |
f24e9980 SW |
1039 | struct ceph_pg_mapping *pg; |
1040 | struct ceph_pg_pool_info *pool; | |
1041 | int ruleno; | |
51042122 SW |
1042 | unsigned poolid, ps, pps; |
1043 | int preferred; | |
f24e9980 SW |
1044 | |
1045 | /* pg_temp? */ | |
9794b146 SW |
1046 | pg = __lookup_pg_mapping(&osdmap->pg_temp, pgid); |
1047 | if (pg) { | |
1048 | *num = pg->len; | |
1049 | return pg->osds; | |
f24e9980 SW |
1050 | } |
1051 | ||
1052 | /* crush */ | |
51042122 SW |
1053 | poolid = le32_to_cpu(pgid.pool); |
1054 | ps = le16_to_cpu(pgid.ps); | |
1055 | preferred = (s16)le16_to_cpu(pgid.preferred); | |
1056 | ||
767ea5c3 SW |
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 | ||
4fc51be8 SW |
1062 | pool = __lookup_pg_pool(&osdmap->pg_pools, poolid); |
1063 | if (!pool) | |
f24e9980 | 1064 | return NULL; |
f24e9980 SW |
1065 | ruleno = crush_find_rule(osdmap->crush, pool->v.crush_ruleset, |
1066 | pool->v.type, pool->v.size); | |
1067 | if (ruleno < 0) { | |
effcb9ed SW |
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); | |
f24e9980 SW |
1071 | return NULL; |
1072 | } | |
1073 | ||
51042122 SW |
1074 | if (preferred >= 0) |
1075 | pps = ceph_stable_mod(ps, | |
f24e9980 SW |
1076 | le32_to_cpu(pool->v.lpgp_num), |
1077 | pool->lpgp_num_mask); | |
1078 | else | |
51042122 | 1079 | pps = ceph_stable_mod(ps, |
f24e9980 SW |
1080 | le32_to_cpu(pool->v.pgp_num), |
1081 | pool->pgp_num_mask); | |
51042122 | 1082 | pps += poolid; |
f24e9980 SW |
1083 | *num = crush_do_rule(osdmap->crush, ruleno, pps, osds, |
1084 | min_t(int, pool->v.size, *num), | |
51042122 | 1085 | preferred, osdmap->osd_weight); |
f24e9980 SW |
1086 | return osds; |
1087 | } | |
1088 | ||
d85b7056 SW |
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 | ||
f24e9980 SW |
1110 | /* |
1111 | * Return primary osd for given pgid, or -1 if none. | |
1112 | */ | |
51042122 | 1113 | int ceph_calc_pg_primary(struct ceph_osdmap *osdmap, struct ceph_pg pgid) |
f24e9980 | 1114 | { |
d85b7056 SW |
1115 | int rawosds[CEPH_PG_MAX_SIZE], *osds; |
1116 | int i, num = CEPH_PG_MAX_SIZE; | |
f24e9980 SW |
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++) | |
d85b7056 | 1124 | if (ceph_osd_is_up(osdmap, osds[i])) |
f24e9980 | 1125 | return osds[i]; |
f24e9980 SW |
1126 | return -1; |
1127 | } | |
3d14c5d2 | 1128 | EXPORT_SYMBOL(ceph_calc_pg_primary); |