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Merge tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
[linux/fpc-iii.git] / net / ceph / osd_client.c
blob61229c5e22cb84e6943978671b3b8bb1749243e6
1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <linux/ceph/ceph_debug.h>
4
5 #include <linux/module.h>
6 #include <linux/err.h>
7 #include <linux/highmem.h>
8 #include <linux/mm.h>
9 #include <linux/pagemap.h>
10 #include <linux/slab.h>
11 #include <linux/uaccess.h>
12 #ifdef CONFIG_BLOCK
13 #include <linux/bio.h>
14 #endif
15
16 #include <linux/ceph/ceph_features.h>
17 #include <linux/ceph/libceph.h>
18 #include <linux/ceph/osd_client.h>
19 #include <linux/ceph/messenger.h>
20 #include <linux/ceph/decode.h>
21 #include <linux/ceph/auth.h>
22 #include <linux/ceph/pagelist.h>
23 #include <linux/ceph/striper.h>
24
25 #define OSD_OPREPLY_FRONT_LEN 512
26
27 static struct kmem_cache *ceph_osd_request_cache;
28
29 static const struct ceph_connection_operations osd_con_ops;
30
31 /*
32 * Implement client access to distributed object storage cluster.
33 *
34 * All data objects are stored within a cluster/cloud of OSDs, or
35 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
36 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
37 * remote daemons serving up and coordinating consistent and safe
38 * access to storage.
39 *
40 * Cluster membership and the mapping of data objects onto storage devices
41 * are described by the osd map.
42 *
43 * We keep track of pending OSD requests (read, write), resubmit
44 * requests to different OSDs when the cluster topology/data layout
45 * change, or retry the affected requests when the communications
46 * channel with an OSD is reset.
47 */
48
49 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
50 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
51 static void link_linger(struct ceph_osd *osd,
52 struct ceph_osd_linger_request *lreq);
53 static void unlink_linger(struct ceph_osd *osd,
54 struct ceph_osd_linger_request *lreq);
55 static void clear_backoffs(struct ceph_osd *osd);
56
57 #if 1
58 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
59 {
60 bool wrlocked = true;
61
62 if (unlikely(down_read_trylock(sem))) {
63 wrlocked = false;
64 up_read(sem);
65 }
66
67 return wrlocked;
68 }
69 static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
70 {
71 WARN_ON(!rwsem_is_locked(&osdc->lock));
72 }
73 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
74 {
75 WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
76 }
77 static inline void verify_osd_locked(struct ceph_osd *osd)
78 {
79 struct ceph_osd_client *osdc = osd->o_osdc;
80
81 WARN_ON(!(mutex_is_locked(&osd->lock) &&
82 rwsem_is_locked(&osdc->lock)) &&
83 !rwsem_is_wrlocked(&osdc->lock));
84 }
85 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
86 {
87 WARN_ON(!mutex_is_locked(&lreq->lock));
88 }
89 #else
90 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
91 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
92 static inline void verify_osd_locked(struct ceph_osd *osd) { }
93 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
94 #endif
95
96 /*
97 * calculate the mapping of a file extent onto an object, and fill out the
98 * request accordingly. shorten extent as necessary if it crosses an
99 * object boundary.
100 *
101 * fill osd op in request message.
102 */
103 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
104 u64 *objnum, u64 *objoff, u64 *objlen)
105 {
106 u64 orig_len = *plen;
107 u32 xlen;
108
109 /* object extent? */
110 ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
111 objoff, &xlen);
112 *objlen = xlen;
113 if (*objlen < orig_len) {
114 *plen = *objlen;
115 dout(" skipping last %llu, final file extent %llu~%llu\n",
116 orig_len - *plen, off, *plen);
117 }
118
119 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
120 return 0;
121 }
122
123 static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
124 {
125 memset(osd_data, 0, sizeof (*osd_data));
126 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
127 }
128
129 /*
130 * Consumes @pages if @own_pages is true.
131 */
132 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
133 struct page **pages, u64 length, u32 alignment,
134 bool pages_from_pool, bool own_pages)
135 {
136 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
137 osd_data->pages = pages;
138 osd_data->length = length;
139 osd_data->alignment = alignment;
140 osd_data->pages_from_pool = pages_from_pool;
141 osd_data->own_pages = own_pages;
142 }
143
144 /*
145 * Consumes a ref on @pagelist.
146 */
147 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
148 struct ceph_pagelist *pagelist)
149 {
150 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
151 osd_data->pagelist = pagelist;
152 }
153
154 #ifdef CONFIG_BLOCK
155 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
156 struct ceph_bio_iter *bio_pos,
157 u32 bio_length)
158 {
159 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
160 osd_data->bio_pos = *bio_pos;
161 osd_data->bio_length = bio_length;
162 }
163 #endif /* CONFIG_BLOCK */
164
165 static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
166 struct ceph_bvec_iter *bvec_pos,
167 u32 num_bvecs)
168 {
169 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
170 osd_data->bvec_pos = *bvec_pos;
171 osd_data->num_bvecs = num_bvecs;
172 }
173
174 static struct ceph_osd_data *
175 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
176 {
177 BUG_ON(which >= osd_req->r_num_ops);
178
179 return &osd_req->r_ops[which].raw_data_in;
180 }
181
182 struct ceph_osd_data *
183 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
184 unsigned int which)
185 {
186 return osd_req_op_data(osd_req, which, extent, osd_data);
187 }
188 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
189
190 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
191 unsigned int which, struct page **pages,
192 u64 length, u32 alignment,
193 bool pages_from_pool, bool own_pages)
194 {
195 struct ceph_osd_data *osd_data;
196
197 osd_data = osd_req_op_raw_data_in(osd_req, which);
198 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
199 pages_from_pool, own_pages);
200 }
201 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
202
203 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
204 unsigned int which, struct page **pages,
205 u64 length, u32 alignment,
206 bool pages_from_pool, bool own_pages)
207 {
208 struct ceph_osd_data *osd_data;
209
210 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
211 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
212 pages_from_pool, own_pages);
213 }
214 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
215
216 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
217 unsigned int which, struct ceph_pagelist *pagelist)
218 {
219 struct ceph_osd_data *osd_data;
220
221 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
222 ceph_osd_data_pagelist_init(osd_data, pagelist);
223 }
224 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
225
226 #ifdef CONFIG_BLOCK
227 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
228 unsigned int which,
229 struct ceph_bio_iter *bio_pos,
230 u32 bio_length)
231 {
232 struct ceph_osd_data *osd_data;
233
234 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
235 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
236 }
237 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
238 #endif /* CONFIG_BLOCK */
239
240 void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
241 unsigned int which,
242 struct bio_vec *bvecs, u32 num_bvecs,
243 u32 bytes)
244 {
245 struct ceph_osd_data *osd_data;
246 struct ceph_bvec_iter it = {
247 .bvecs = bvecs,
248 .iter = { .bi_size = bytes },
249 };
250
251 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
252 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
253 }
254 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
255
256 void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
257 unsigned int which,
258 struct ceph_bvec_iter *bvec_pos)
259 {
260 struct ceph_osd_data *osd_data;
261
262 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
263 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
264 }
265 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
266
267 static void osd_req_op_cls_request_info_pagelist(
268 struct ceph_osd_request *osd_req,
269 unsigned int which, struct ceph_pagelist *pagelist)
270 {
271 struct ceph_osd_data *osd_data;
272
273 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
274 ceph_osd_data_pagelist_init(osd_data, pagelist);
275 }
276
277 void osd_req_op_cls_request_data_pagelist(
278 struct ceph_osd_request *osd_req,
279 unsigned int which, struct ceph_pagelist *pagelist)
280 {
281 struct ceph_osd_data *osd_data;
282
283 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
284 ceph_osd_data_pagelist_init(osd_data, pagelist);
285 osd_req->r_ops[which].cls.indata_len += pagelist->length;
286 osd_req->r_ops[which].indata_len += pagelist->length;
287 }
288 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
289
290 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
291 unsigned int which, struct page **pages, u64 length,
292 u32 alignment, bool pages_from_pool, bool own_pages)
293 {
294 struct ceph_osd_data *osd_data;
295
296 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
297 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
298 pages_from_pool, own_pages);
299 osd_req->r_ops[which].cls.indata_len += length;
300 osd_req->r_ops[which].indata_len += length;
301 }
302 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
303
304 void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
305 unsigned int which,
306 struct bio_vec *bvecs, u32 num_bvecs,
307 u32 bytes)
308 {
309 struct ceph_osd_data *osd_data;
310 struct ceph_bvec_iter it = {
311 .bvecs = bvecs,
312 .iter = { .bi_size = bytes },
313 };
314
315 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
316 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
317 osd_req->r_ops[which].cls.indata_len += bytes;
318 osd_req->r_ops[which].indata_len += bytes;
319 }
320 EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
321
322 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
323 unsigned int which, struct page **pages, u64 length,
324 u32 alignment, bool pages_from_pool, bool own_pages)
325 {
326 struct ceph_osd_data *osd_data;
327
328 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
329 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
330 pages_from_pool, own_pages);
331 }
332 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
333
334 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
335 {
336 switch (osd_data->type) {
337 case CEPH_OSD_DATA_TYPE_NONE:
338 return 0;
339 case CEPH_OSD_DATA_TYPE_PAGES:
340 return osd_data->length;
341 case CEPH_OSD_DATA_TYPE_PAGELIST:
342 return (u64)osd_data->pagelist->length;
343 #ifdef CONFIG_BLOCK
344 case CEPH_OSD_DATA_TYPE_BIO:
345 return (u64)osd_data->bio_length;
346 #endif /* CONFIG_BLOCK */
347 case CEPH_OSD_DATA_TYPE_BVECS:
348 return osd_data->bvec_pos.iter.bi_size;
349 default:
350 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
351 return 0;
352 }
353 }
354
355 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
356 {
357 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
358 int num_pages;
359
360 num_pages = calc_pages_for((u64)osd_data->alignment,
361 (u64)osd_data->length);
362 ceph_release_page_vector(osd_data->pages, num_pages);
363 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
364 ceph_pagelist_release(osd_data->pagelist);
365 }
366 ceph_osd_data_init(osd_data);
367 }
368
369 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
370 unsigned int which)
371 {
372 struct ceph_osd_req_op *op;
373
374 BUG_ON(which >= osd_req->r_num_ops);
375 op = &osd_req->r_ops[which];
376
377 switch (op->op) {
378 case CEPH_OSD_OP_READ:
379 case CEPH_OSD_OP_WRITE:
380 case CEPH_OSD_OP_WRITEFULL:
381 ceph_osd_data_release(&op->extent.osd_data);
382 break;
383 case CEPH_OSD_OP_CALL:
384 ceph_osd_data_release(&op->cls.request_info);
385 ceph_osd_data_release(&op->cls.request_data);
386 ceph_osd_data_release(&op->cls.response_data);
387 break;
388 case CEPH_OSD_OP_SETXATTR:
389 case CEPH_OSD_OP_CMPXATTR:
390 ceph_osd_data_release(&op->xattr.osd_data);
391 break;
392 case CEPH_OSD_OP_STAT:
393 ceph_osd_data_release(&op->raw_data_in);
394 break;
395 case CEPH_OSD_OP_NOTIFY_ACK:
396 ceph_osd_data_release(&op->notify_ack.request_data);
397 break;
398 case CEPH_OSD_OP_NOTIFY:
399 ceph_osd_data_release(&op->notify.request_data);
400 ceph_osd_data_release(&op->notify.response_data);
401 break;
402 case CEPH_OSD_OP_LIST_WATCHERS:
403 ceph_osd_data_release(&op->list_watchers.response_data);
404 break;
405 case CEPH_OSD_OP_COPY_FROM2:
406 ceph_osd_data_release(&op->copy_from.osd_data);
407 break;
408 default:
409 break;
410 }
411 }
412
413 /*
414 * Assumes @t is zero-initialized.
415 */
416 static void target_init(struct ceph_osd_request_target *t)
417 {
418 ceph_oid_init(&t->base_oid);
419 ceph_oloc_init(&t->base_oloc);
420 ceph_oid_init(&t->target_oid);
421 ceph_oloc_init(&t->target_oloc);
422
423 ceph_osds_init(&t->acting);
424 ceph_osds_init(&t->up);
425 t->size = -1;
426 t->min_size = -1;
427
428 t->osd = CEPH_HOMELESS_OSD;
429 }
430
431 static void target_copy(struct ceph_osd_request_target *dest,
432 const struct ceph_osd_request_target *src)
433 {
434 ceph_oid_copy(&dest->base_oid, &src->base_oid);
435 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
436 ceph_oid_copy(&dest->target_oid, &src->target_oid);
437 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
438
439 dest->pgid = src->pgid; /* struct */
440 dest->spgid = src->spgid; /* struct */
441 dest->pg_num = src->pg_num;
442 dest->pg_num_mask = src->pg_num_mask;
443 ceph_osds_copy(&dest->acting, &src->acting);
444 ceph_osds_copy(&dest->up, &src->up);
445 dest->size = src->size;
446 dest->min_size = src->min_size;
447 dest->sort_bitwise = src->sort_bitwise;
448 dest->recovery_deletes = src->recovery_deletes;
449
450 dest->flags = src->flags;
451 dest->used_replica = src->used_replica;
452 dest->paused = src->paused;
453
454 dest->epoch = src->epoch;
455 dest->last_force_resend = src->last_force_resend;
456
457 dest->osd = src->osd;
458 }
459
460 static void target_destroy(struct ceph_osd_request_target *t)
461 {
462 ceph_oid_destroy(&t->base_oid);
463 ceph_oloc_destroy(&t->base_oloc);
464 ceph_oid_destroy(&t->target_oid);
465 ceph_oloc_destroy(&t->target_oloc);
466 }
467
468 /*
469 * requests
470 */
471 static void request_release_checks(struct ceph_osd_request *req)
472 {
473 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
474 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
475 WARN_ON(!list_empty(&req->r_private_item));
476 WARN_ON(req->r_osd);
477 }
478
479 static void ceph_osdc_release_request(struct kref *kref)
480 {
481 struct ceph_osd_request *req = container_of(kref,
482 struct ceph_osd_request, r_kref);
483 unsigned int which;
484
485 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
486 req->r_request, req->r_reply);
487 request_release_checks(req);
488
489 if (req->r_request)
490 ceph_msg_put(req->r_request);
491 if (req->r_reply)
492 ceph_msg_put(req->r_reply);
493
494 for (which = 0; which < req->r_num_ops; which++)
495 osd_req_op_data_release(req, which);
496
497 target_destroy(&req->r_t);
498 ceph_put_snap_context(req->r_snapc);
499
500 if (req->r_mempool)
501 mempool_free(req, req->r_osdc->req_mempool);
502 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
503 kmem_cache_free(ceph_osd_request_cache, req);
504 else
505 kfree(req);
506 }
507
508 void ceph_osdc_get_request(struct ceph_osd_request *req)
509 {
510 dout("%s %p (was %d)\n", __func__, req,
511 kref_read(&req->r_kref));
512 kref_get(&req->r_kref);
513 }
514 EXPORT_SYMBOL(ceph_osdc_get_request);
515
516 void ceph_osdc_put_request(struct ceph_osd_request *req)
517 {
518 if (req) {
519 dout("%s %p (was %d)\n", __func__, req,
520 kref_read(&req->r_kref));
521 kref_put(&req->r_kref, ceph_osdc_release_request);
522 }
523 }
524 EXPORT_SYMBOL(ceph_osdc_put_request);
525
526 static void request_init(struct ceph_osd_request *req)
527 {
528 /* req only, each op is zeroed in osd_req_op_init() */
529 memset(req, 0, sizeof(*req));
530
531 kref_init(&req->r_kref);
532 init_completion(&req->r_completion);
533 RB_CLEAR_NODE(&req->r_node);
534 RB_CLEAR_NODE(&req->r_mc_node);
535 INIT_LIST_HEAD(&req->r_private_item);
536
537 target_init(&req->r_t);
538 }
539
540 /*
541 * This is ugly, but it allows us to reuse linger registration and ping
542 * requests, keeping the structure of the code around send_linger{_ping}()
543 * reasonable. Setting up a min_nr=2 mempool for each linger request
544 * and dealing with copying ops (this blasts req only, watch op remains
545 * intact) isn't any better.
546 */
547 static void request_reinit(struct ceph_osd_request *req)
548 {
549 struct ceph_osd_client *osdc = req->r_osdc;
550 bool mempool = req->r_mempool;
551 unsigned int num_ops = req->r_num_ops;
552 u64 snapid = req->r_snapid;
553 struct ceph_snap_context *snapc = req->r_snapc;
554 bool linger = req->r_linger;
555 struct ceph_msg *request_msg = req->r_request;
556 struct ceph_msg *reply_msg = req->r_reply;
557
558 dout("%s req %p\n", __func__, req);
559 WARN_ON(kref_read(&req->r_kref) != 1);
560 request_release_checks(req);
561
562 WARN_ON(kref_read(&request_msg->kref) != 1);
563 WARN_ON(kref_read(&reply_msg->kref) != 1);
564 target_destroy(&req->r_t);
565
566 request_init(req);
567 req->r_osdc = osdc;
568 req->r_mempool = mempool;
569 req->r_num_ops = num_ops;
570 req->r_snapid = snapid;
571 req->r_snapc = snapc;
572 req->r_linger = linger;
573 req->r_request = request_msg;
574 req->r_reply = reply_msg;
575 }
576
577 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
578 struct ceph_snap_context *snapc,
579 unsigned int num_ops,
580 bool use_mempool,
581 gfp_t gfp_flags)
582 {
583 struct ceph_osd_request *req;
584
585 if (use_mempool) {
586 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
587 req = mempool_alloc(osdc->req_mempool, gfp_flags);
588 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
589 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
590 } else {
591 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
592 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
593 }
594 if (unlikely(!req))
595 return NULL;
596
597 request_init(req);
598 req->r_osdc = osdc;
599 req->r_mempool = use_mempool;
600 req->r_num_ops = num_ops;
601 req->r_snapid = CEPH_NOSNAP;
602 req->r_snapc = ceph_get_snap_context(snapc);
603
604 dout("%s req %p\n", __func__, req);
605 return req;
606 }
607 EXPORT_SYMBOL(ceph_osdc_alloc_request);
608
609 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
610 {
611 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
612 }
613
614 static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
615 int num_request_data_items,
616 int num_reply_data_items)
617 {
618 struct ceph_osd_client *osdc = req->r_osdc;
619 struct ceph_msg *msg;
620 int msg_size;
621
622 WARN_ON(req->r_request || req->r_reply);
623 WARN_ON(ceph_oid_empty(&req->r_base_oid));
624 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
625
626 /* create request message */
627 msg_size = CEPH_ENCODING_START_BLK_LEN +
628 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
629 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
630 msg_size += CEPH_ENCODING_START_BLK_LEN +
631 sizeof(struct ceph_osd_reqid); /* reqid */
632 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
633 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
634 msg_size += CEPH_ENCODING_START_BLK_LEN +
635 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
636 msg_size += 4 + req->r_base_oid.name_len; /* oid */
637 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
638 msg_size += 8; /* snapid */
639 msg_size += 8; /* snap_seq */
640 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
641 msg_size += 4 + 8; /* retry_attempt, features */
642
643 if (req->r_mempool)
644 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
645 num_request_data_items);
646 else
647 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
648 num_request_data_items, gfp, true);
649 if (!msg)
650 return -ENOMEM;
651
652 memset(msg->front.iov_base, 0, msg->front.iov_len);
653 req->r_request = msg;
654
655 /* create reply message */
656 msg_size = OSD_OPREPLY_FRONT_LEN;
657 msg_size += req->r_base_oid.name_len;
658 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
659
660 if (req->r_mempool)
661 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
662 num_reply_data_items);
663 else
664 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
665 num_reply_data_items, gfp, true);
666 if (!msg)
667 return -ENOMEM;
668
669 req->r_reply = msg;
670
671 return 0;
672 }
673
674 static bool osd_req_opcode_valid(u16 opcode)
675 {
676 switch (opcode) {
677 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
678 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
679 #undef GENERATE_CASE
680 default:
681 return false;
682 }
683 }
684
685 static void get_num_data_items(struct ceph_osd_request *req,
686 int *num_request_data_items,
687 int *num_reply_data_items)
688 {
689 struct ceph_osd_req_op *op;
690
691 *num_request_data_items = 0;
692 *num_reply_data_items = 0;
693
694 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
695 switch (op->op) {
696 /* request */
697 case CEPH_OSD_OP_WRITE:
698 case CEPH_OSD_OP_WRITEFULL:
699 case CEPH_OSD_OP_SETXATTR:
700 case CEPH_OSD_OP_CMPXATTR:
701 case CEPH_OSD_OP_NOTIFY_ACK:
702 case CEPH_OSD_OP_COPY_FROM2:
703 *num_request_data_items += 1;
704 break;
705
706 /* reply */
707 case CEPH_OSD_OP_STAT:
708 case CEPH_OSD_OP_READ:
709 case CEPH_OSD_OP_LIST_WATCHERS:
710 *num_reply_data_items += 1;
711 break;
712
713 /* both */
714 case CEPH_OSD_OP_NOTIFY:
715 *num_request_data_items += 1;
716 *num_reply_data_items += 1;
717 break;
718 case CEPH_OSD_OP_CALL:
719 *num_request_data_items += 2;
720 *num_reply_data_items += 1;
721 break;
722
723 default:
724 WARN_ON(!osd_req_opcode_valid(op->op));
725 break;
726 }
727 }
728 }
729
730 /*
731 * oid, oloc and OSD op opcode(s) must be filled in before this function
732 * is called.
733 */
734 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
735 {
736 int num_request_data_items, num_reply_data_items;
737
738 get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
739 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
740 num_reply_data_items);
741 }
742 EXPORT_SYMBOL(ceph_osdc_alloc_messages);
743
744 /*
745 * This is an osd op init function for opcodes that have no data or
746 * other information associated with them. It also serves as a
747 * common init routine for all the other init functions, below.
748 */
749 struct ceph_osd_req_op *
750 osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
751 u16 opcode, u32 flags)
752 {
753 struct ceph_osd_req_op *op;
754
755 BUG_ON(which >= osd_req->r_num_ops);
756 BUG_ON(!osd_req_opcode_valid(opcode));
757
758 op = &osd_req->r_ops[which];
759 memset(op, 0, sizeof (*op));
760 op->op = opcode;
761 op->flags = flags;
762
763 return op;
764 }
765 EXPORT_SYMBOL(osd_req_op_init);
766
767 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
768 unsigned int which, u16 opcode,
769 u64 offset, u64 length,
770 u64 truncate_size, u32 truncate_seq)
771 {
772 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
773 opcode, 0);
774 size_t payload_len = 0;
775
776 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
777 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
778 opcode != CEPH_OSD_OP_TRUNCATE);
779
780 op->extent.offset = offset;
781 op->extent.length = length;
782 op->extent.truncate_size = truncate_size;
783 op->extent.truncate_seq = truncate_seq;
784 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
785 payload_len += length;
786
787 op->indata_len = payload_len;
788 }
789 EXPORT_SYMBOL(osd_req_op_extent_init);
790
791 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
792 unsigned int which, u64 length)
793 {
794 struct ceph_osd_req_op *op;
795 u64 previous;
796
797 BUG_ON(which >= osd_req->r_num_ops);
798 op = &osd_req->r_ops[which];
799 previous = op->extent.length;
800
801 if (length == previous)
802 return; /* Nothing to do */
803 BUG_ON(length > previous);
804
805 op->extent.length = length;
806 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
807 op->indata_len -= previous - length;
808 }
809 EXPORT_SYMBOL(osd_req_op_extent_update);
810
811 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
812 unsigned int which, u64 offset_inc)
813 {
814 struct ceph_osd_req_op *op, *prev_op;
815
816 BUG_ON(which + 1 >= osd_req->r_num_ops);
817
818 prev_op = &osd_req->r_ops[which];
819 op = osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
820 /* dup previous one */
821 op->indata_len = prev_op->indata_len;
822 op->outdata_len = prev_op->outdata_len;
823 op->extent = prev_op->extent;
824 /* adjust offset */
825 op->extent.offset += offset_inc;
826 op->extent.length -= offset_inc;
827
828 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
829 op->indata_len -= offset_inc;
830 }
831 EXPORT_SYMBOL(osd_req_op_extent_dup_last);
832
833 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
834 const char *class, const char *method)
835 {
836 struct ceph_osd_req_op *op;
837 struct ceph_pagelist *pagelist;
838 size_t payload_len = 0;
839 size_t size;
840 int ret;
841
842 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
843
844 pagelist = ceph_pagelist_alloc(GFP_NOFS);
845 if (!pagelist)
846 return -ENOMEM;
847
848 op->cls.class_name = class;
849 size = strlen(class);
850 BUG_ON(size > (size_t) U8_MAX);
851 op->cls.class_len = size;
852 ret = ceph_pagelist_append(pagelist, class, size);
853 if (ret)
854 goto err_pagelist_free;
855 payload_len += size;
856
857 op->cls.method_name = method;
858 size = strlen(method);
859 BUG_ON(size > (size_t) U8_MAX);
860 op->cls.method_len = size;
861 ret = ceph_pagelist_append(pagelist, method, size);
862 if (ret)
863 goto err_pagelist_free;
864 payload_len += size;
865
866 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
867 op->indata_len = payload_len;
868 return 0;
869
870 err_pagelist_free:
871 ceph_pagelist_release(pagelist);
872 return ret;
873 }
874 EXPORT_SYMBOL(osd_req_op_cls_init);
875
876 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
877 u16 opcode, const char *name, const void *value,
878 size_t size, u8 cmp_op, u8 cmp_mode)
879 {
880 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
881 opcode, 0);
882 struct ceph_pagelist *pagelist;
883 size_t payload_len;
884 int ret;
885
886 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
887
888 pagelist = ceph_pagelist_alloc(GFP_NOFS);
889 if (!pagelist)
890 return -ENOMEM;
891
892 payload_len = strlen(name);
893 op->xattr.name_len = payload_len;
894 ret = ceph_pagelist_append(pagelist, name, payload_len);
895 if (ret)
896 goto err_pagelist_free;
897
898 op->xattr.value_len = size;
899 ret = ceph_pagelist_append(pagelist, value, size);
900 if (ret)
901 goto err_pagelist_free;
902 payload_len += size;
903
904 op->xattr.cmp_op = cmp_op;
905 op->xattr.cmp_mode = cmp_mode;
906
907 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
908 op->indata_len = payload_len;
909 return 0;
910
911 err_pagelist_free:
912 ceph_pagelist_release(pagelist);
913 return ret;
914 }
915 EXPORT_SYMBOL(osd_req_op_xattr_init);
916
917 /*
918 * @watch_opcode: CEPH_OSD_WATCH_OP_*
919 */
920 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
921 u64 cookie, u8 watch_opcode)
922 {
923 struct ceph_osd_req_op *op;
924
925 op = osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
926 op->watch.cookie = cookie;
927 op->watch.op = watch_opcode;
928 op->watch.gen = 0;
929 }
930
931 /*
932 * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_*
933 */
934 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
935 unsigned int which,
936 u64 expected_object_size,
937 u64 expected_write_size,
938 u32 flags)
939 {
940 struct ceph_osd_req_op *op;
941
942 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_SETALLOCHINT, 0);
943 op->alloc_hint.expected_object_size = expected_object_size;
944 op->alloc_hint.expected_write_size = expected_write_size;
945 op->alloc_hint.flags = flags;
946
947 /*
948 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
949 * not worth a feature bit. Set FAILOK per-op flag to make
950 * sure older osds don't trip over an unsupported opcode.
951 */
952 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
953 }
954 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
955
956 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
957 struct ceph_osd_data *osd_data)
958 {
959 u64 length = ceph_osd_data_length(osd_data);
960
961 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
962 BUG_ON(length > (u64) SIZE_MAX);
963 if (length)
964 ceph_msg_data_add_pages(msg, osd_data->pages,
965 length, osd_data->alignment, false);
966 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
967 BUG_ON(!length);
968 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
969 #ifdef CONFIG_BLOCK
970 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
971 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
972 #endif
973 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
974 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
975 } else {
976 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
977 }
978 }
979
980 static u32 osd_req_encode_op(struct ceph_osd_op *dst,
981 const struct ceph_osd_req_op *src)
982 {
983 switch (src->op) {
984 case CEPH_OSD_OP_STAT:
985 break;
986 case CEPH_OSD_OP_READ:
987 case CEPH_OSD_OP_WRITE:
988 case CEPH_OSD_OP_WRITEFULL:
989 case CEPH_OSD_OP_ZERO:
990 case CEPH_OSD_OP_TRUNCATE:
991 dst->extent.offset = cpu_to_le64(src->extent.offset);
992 dst->extent.length = cpu_to_le64(src->extent.length);
993 dst->extent.truncate_size =
994 cpu_to_le64(src->extent.truncate_size);
995 dst->extent.truncate_seq =
996 cpu_to_le32(src->extent.truncate_seq);
997 break;
998 case CEPH_OSD_OP_CALL:
999 dst->cls.class_len = src->cls.class_len;
1000 dst->cls.method_len = src->cls.method_len;
1001 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
1002 break;
1003 case CEPH_OSD_OP_WATCH:
1004 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
1005 dst->watch.ver = cpu_to_le64(0);
1006 dst->watch.op = src->watch.op;
1007 dst->watch.gen = cpu_to_le32(src->watch.gen);
1008 break;
1009 case CEPH_OSD_OP_NOTIFY_ACK:
1010 break;
1011 case CEPH_OSD_OP_NOTIFY:
1012 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
1013 break;
1014 case CEPH_OSD_OP_LIST_WATCHERS:
1015 break;
1016 case CEPH_OSD_OP_SETALLOCHINT:
1017 dst->alloc_hint.expected_object_size =
1018 cpu_to_le64(src->alloc_hint.expected_object_size);
1019 dst->alloc_hint.expected_write_size =
1020 cpu_to_le64(src->alloc_hint.expected_write_size);
1021 dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags);
1022 break;
1023 case CEPH_OSD_OP_SETXATTR:
1024 case CEPH_OSD_OP_CMPXATTR:
1025 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1026 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1027 dst->xattr.cmp_op = src->xattr.cmp_op;
1028 dst->xattr.cmp_mode = src->xattr.cmp_mode;
1029 break;
1030 case CEPH_OSD_OP_CREATE:
1031 case CEPH_OSD_OP_DELETE:
1032 break;
1033 case CEPH_OSD_OP_COPY_FROM2:
1034 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1035 dst->copy_from.src_version =
1036 cpu_to_le64(src->copy_from.src_version);
1037 dst->copy_from.flags = src->copy_from.flags;
1038 dst->copy_from.src_fadvise_flags =
1039 cpu_to_le32(src->copy_from.src_fadvise_flags);
1040 break;
1041 default:
1042 pr_err("unsupported osd opcode %s\n",
1043 ceph_osd_op_name(src->op));
1044 WARN_ON(1);
1045
1046 return 0;
1047 }
1048
1049 dst->op = cpu_to_le16(src->op);
1050 dst->flags = cpu_to_le32(src->flags);
1051 dst->payload_len = cpu_to_le32(src->indata_len);
1052
1053 return src->indata_len;
1054 }
1055
1056 /*
1057 * build new request AND message, calculate layout, and adjust file
1058 * extent as needed.
1059 *
1060 * if the file was recently truncated, we include information about its
1061 * old and new size so that the object can be updated appropriately. (we
1062 * avoid synchronously deleting truncated objects because it's slow.)
1063 */
1064 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1065 struct ceph_file_layout *layout,
1066 struct ceph_vino vino,
1067 u64 off, u64 *plen,
1068 unsigned int which, int num_ops,
1069 int opcode, int flags,
1070 struct ceph_snap_context *snapc,
1071 u32 truncate_seq,
1072 u64 truncate_size,
1073 bool use_mempool)
1074 {
1075 struct ceph_osd_request *req;
1076 u64 objnum = 0;
1077 u64 objoff = 0;
1078 u64 objlen = 0;
1079 int r;
1080
1081 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
1082 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1083 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
1084
1085 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
1086 GFP_NOFS);
1087 if (!req) {
1088 r = -ENOMEM;
1089 goto fail;
1090 }
1091
1092 /* calculate max write size */
1093 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
1094 if (r)
1095 goto fail;
1096
1097 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
1098 osd_req_op_init(req, which, opcode, 0);
1099 } else {
1100 u32 object_size = layout->object_size;
1101 u32 object_base = off - objoff;
1102 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1103 if (truncate_size <= object_base) {
1104 truncate_size = 0;
1105 } else {
1106 truncate_size -= object_base;
1107 if (truncate_size > object_size)
1108 truncate_size = object_size;
1109 }
1110 }
1111 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1112 truncate_size, truncate_seq);
1113 }
1114
1115 req->r_base_oloc.pool = layout->pool_id;
1116 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1117 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1118 req->r_flags = flags | osdc->client->options->read_from_replica;
1119
1120 req->r_snapid = vino.snap;
1121 if (flags & CEPH_OSD_FLAG_WRITE)
1122 req->r_data_offset = off;
1123
1124 if (num_ops > 1)
1125 /*
1126 * This is a special case for ceph_writepages_start(), but it
1127 * also covers ceph_uninline_data(). If more multi-op request
1128 * use cases emerge, we will need a separate helper.
1129 */
1130 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
1131 else
1132 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
1133 if (r)
1134 goto fail;
1135
1136 return req;
1137
1138 fail:
1139 ceph_osdc_put_request(req);
1140 return ERR_PTR(r);
1141 }
1142 EXPORT_SYMBOL(ceph_osdc_new_request);
1143
1144 /*
1145 * We keep osd requests in an rbtree, sorted by ->r_tid.
1146 */
1147 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
1148 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
1149
1150 /*
1151 * Call @fn on each OSD request as long as @fn returns 0.
1152 */
1153 static void for_each_request(struct ceph_osd_client *osdc,
1154 int (*fn)(struct ceph_osd_request *req, void *arg),
1155 void *arg)
1156 {
1157 struct rb_node *n, *p;
1158
1159 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1160 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1161
1162 for (p = rb_first(&osd->o_requests); p; ) {
1163 struct ceph_osd_request *req =
1164 rb_entry(p, struct ceph_osd_request, r_node);
1165
1166 p = rb_next(p);
1167 if (fn(req, arg))
1168 return;
1169 }
1170 }
1171
1172 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1173 struct ceph_osd_request *req =
1174 rb_entry(p, struct ceph_osd_request, r_node);
1175
1176 p = rb_next(p);
1177 if (fn(req, arg))
1178 return;
1179 }
1180 }
1181
1182 static bool osd_homeless(struct ceph_osd *osd)
1183 {
1184 return osd->o_osd == CEPH_HOMELESS_OSD;
1185 }
1186
1187 static bool osd_registered(struct ceph_osd *osd)
1188 {
1189 verify_osdc_locked(osd->o_osdc);
1190
1191 return !RB_EMPTY_NODE(&osd->o_node);
1192 }
1193
1194 /*
1195 * Assumes @osd is zero-initialized.
1196 */
1197 static void osd_init(struct ceph_osd *osd)
1198 {
1199 refcount_set(&osd->o_ref, 1);
1200 RB_CLEAR_NODE(&osd->o_node);
1201 osd->o_requests = RB_ROOT;
1202 osd->o_linger_requests = RB_ROOT;
1203 osd->o_backoff_mappings = RB_ROOT;
1204 osd->o_backoffs_by_id = RB_ROOT;
1205 INIT_LIST_HEAD(&osd->o_osd_lru);
1206 INIT_LIST_HEAD(&osd->o_keepalive_item);
1207 osd->o_incarnation = 1;
1208 mutex_init(&osd->lock);
1209 }
1210
1211 static void osd_cleanup(struct ceph_osd *osd)
1212 {
1213 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1214 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1215 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1216 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1217 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1218 WARN_ON(!list_empty(&osd->o_osd_lru));
1219 WARN_ON(!list_empty(&osd->o_keepalive_item));
1220
1221 if (osd->o_auth.authorizer) {
1222 WARN_ON(osd_homeless(osd));
1223 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1224 }
1225 }
1226
1227 /*
1228 * Track open sessions with osds.
1229 */
1230 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1231 {
1232 struct ceph_osd *osd;
1233
1234 WARN_ON(onum == CEPH_HOMELESS_OSD);
1235
1236 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1237 osd_init(osd);
1238 osd->o_osdc = osdc;
1239 osd->o_osd = onum;
1240
1241 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1242
1243 return osd;
1244 }
1245
1246 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1247 {
1248 if (refcount_inc_not_zero(&osd->o_ref)) {
1249 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1250 refcount_read(&osd->o_ref));
1251 return osd;
1252 } else {
1253 dout("get_osd %p FAIL\n", osd);
1254 return NULL;
1255 }
1256 }
1257
1258 static void put_osd(struct ceph_osd *osd)
1259 {
1260 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1261 refcount_read(&osd->o_ref) - 1);
1262 if (refcount_dec_and_test(&osd->o_ref)) {
1263 osd_cleanup(osd);
1264 kfree(osd);
1265 }
1266 }
1267
1268 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1269
1270 static void __move_osd_to_lru(struct ceph_osd *osd)
1271 {
1272 struct ceph_osd_client *osdc = osd->o_osdc;
1273
1274 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1275 BUG_ON(!list_empty(&osd->o_osd_lru));
1276
1277 spin_lock(&osdc->osd_lru_lock);
1278 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1279 spin_unlock(&osdc->osd_lru_lock);
1280
1281 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1282 }
1283
1284 static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1285 {
1286 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1287 RB_EMPTY_ROOT(&osd->o_linger_requests))
1288 __move_osd_to_lru(osd);
1289 }
1290
1291 static void __remove_osd_from_lru(struct ceph_osd *osd)
1292 {
1293 struct ceph_osd_client *osdc = osd->o_osdc;
1294
1295 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1296
1297 spin_lock(&osdc->osd_lru_lock);
1298 if (!list_empty(&osd->o_osd_lru))
1299 list_del_init(&osd->o_osd_lru);
1300 spin_unlock(&osdc->osd_lru_lock);
1301 }
1302
1303 /*
1304 * Close the connection and assign any leftover requests to the
1305 * homeless session.
1306 */
1307 static void close_osd(struct ceph_osd *osd)
1308 {
1309 struct ceph_osd_client *osdc = osd->o_osdc;
1310 struct rb_node *n;
1311
1312 verify_osdc_wrlocked(osdc);
1313 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1314
1315 ceph_con_close(&osd->o_con);
1316
1317 for (n = rb_first(&osd->o_requests); n; ) {
1318 struct ceph_osd_request *req =
1319 rb_entry(n, struct ceph_osd_request, r_node);
1320
1321 n = rb_next(n); /* unlink_request() */
1322
1323 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1324 unlink_request(osd, req);
1325 link_request(&osdc->homeless_osd, req);
1326 }
1327 for (n = rb_first(&osd->o_linger_requests); n; ) {
1328 struct ceph_osd_linger_request *lreq =
1329 rb_entry(n, struct ceph_osd_linger_request, node);
1330
1331 n = rb_next(n); /* unlink_linger() */
1332
1333 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1334 lreq->linger_id);
1335 unlink_linger(osd, lreq);
1336 link_linger(&osdc->homeless_osd, lreq);
1337 }
1338 clear_backoffs(osd);
1339
1340 __remove_osd_from_lru(osd);
1341 erase_osd(&osdc->osds, osd);
1342 put_osd(osd);
1343 }
1344
1345 /*
1346 * reset osd connect
1347 */
1348 static int reopen_osd(struct ceph_osd *osd)
1349 {
1350 struct ceph_entity_addr *peer_addr;
1351
1352 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1353
1354 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1355 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1356 close_osd(osd);
1357 return -ENODEV;
1358 }
1359
1360 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1361 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1362 !ceph_con_opened(&osd->o_con)) {
1363 struct rb_node *n;
1364
1365 dout("osd addr hasn't changed and connection never opened, "
1366 "letting msgr retry\n");
1367 /* touch each r_stamp for handle_timeout()'s benfit */
1368 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1369 struct ceph_osd_request *req =
1370 rb_entry(n, struct ceph_osd_request, r_node);
1371 req->r_stamp = jiffies;
1372 }
1373
1374 return -EAGAIN;
1375 }
1376
1377 ceph_con_close(&osd->o_con);
1378 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1379 osd->o_incarnation++;
1380
1381 return 0;
1382 }
1383
1384 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1385 bool wrlocked)
1386 {
1387 struct ceph_osd *osd;
1388
1389 if (wrlocked)
1390 verify_osdc_wrlocked(osdc);
1391 else
1392 verify_osdc_locked(osdc);
1393
1394 if (o != CEPH_HOMELESS_OSD)
1395 osd = lookup_osd(&osdc->osds, o);
1396 else
1397 osd = &osdc->homeless_osd;
1398 if (!osd) {
1399 if (!wrlocked)
1400 return ERR_PTR(-EAGAIN);
1401
1402 osd = create_osd(osdc, o);
1403 insert_osd(&osdc->osds, osd);
1404 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1405 &osdc->osdmap->osd_addr[osd->o_osd]);
1406 }
1407
1408 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1409 return osd;
1410 }
1411
1412 /*
1413 * Create request <-> OSD session relation.
1414 *
1415 * @req has to be assigned a tid, @osd may be homeless.
1416 */
1417 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1418 {
1419 verify_osd_locked(osd);
1420 WARN_ON(!req->r_tid || req->r_osd);
1421 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1422 req, req->r_tid);
1423
1424 if (!osd_homeless(osd))
1425 __remove_osd_from_lru(osd);
1426 else
1427 atomic_inc(&osd->o_osdc->num_homeless);
1428
1429 get_osd(osd);
1430 insert_request(&osd->o_requests, req);
1431 req->r_osd = osd;
1432 }
1433
1434 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1435 {
1436 verify_osd_locked(osd);
1437 WARN_ON(req->r_osd != osd);
1438 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1439 req, req->r_tid);
1440
1441 req->r_osd = NULL;
1442 erase_request(&osd->o_requests, req);
1443 put_osd(osd);
1444
1445 if (!osd_homeless(osd))
1446 maybe_move_osd_to_lru(osd);
1447 else
1448 atomic_dec(&osd->o_osdc->num_homeless);
1449 }
1450
1451 static bool __pool_full(struct ceph_pg_pool_info *pi)
1452 {
1453 return pi->flags & CEPH_POOL_FLAG_FULL;
1454 }
1455
1456 static bool have_pool_full(struct ceph_osd_client *osdc)
1457 {
1458 struct rb_node *n;
1459
1460 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1461 struct ceph_pg_pool_info *pi =
1462 rb_entry(n, struct ceph_pg_pool_info, node);
1463
1464 if (__pool_full(pi))
1465 return true;
1466 }
1467
1468 return false;
1469 }
1470
1471 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1472 {
1473 struct ceph_pg_pool_info *pi;
1474
1475 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1476 if (!pi)
1477 return false;
1478
1479 return __pool_full(pi);
1480 }
1481
1482 /*
1483 * Returns whether a request should be blocked from being sent
1484 * based on the current osdmap and osd_client settings.
1485 */
1486 static bool target_should_be_paused(struct ceph_osd_client *osdc,
1487 const struct ceph_osd_request_target *t,
1488 struct ceph_pg_pool_info *pi)
1489 {
1490 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1491 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1492 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1493 __pool_full(pi);
1494
1495 WARN_ON(pi->id != t->target_oloc.pool);
1496 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1497 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1498 (osdc->osdmap->epoch < osdc->epoch_barrier);
1499 }
1500
1501 static int pick_random_replica(const struct ceph_osds *acting)
1502 {
1503 int i = prandom_u32() % acting->size;
1504
1505 dout("%s picked osd%d, primary osd%d\n", __func__,
1506 acting->osds[i], acting->primary);
1507 return i;
1508 }
1509
1510 /*
1511 * Picks the closest replica based on client's location given by
1512 * crush_location option. Prefers the primary if the locality is
1513 * the same.
1514 */
1515 static int pick_closest_replica(struct ceph_osd_client *osdc,
1516 const struct ceph_osds *acting)
1517 {
1518 struct ceph_options *opt = osdc->client->options;
1519 int best_i, best_locality;
1520 int i = 0, locality;
1521
1522 do {
1523 locality = ceph_get_crush_locality(osdc->osdmap,
1524 acting->osds[i],
1525 &opt->crush_locs);
1526 if (i == 0 ||
1527 (locality >= 0 && best_locality < 0) ||
1528 (locality >= 0 && best_locality >= 0 &&
1529 locality < best_locality)) {
1530 best_i = i;
1531 best_locality = locality;
1532 }
1533 } while (++i < acting->size);
1534
1535 dout("%s picked osd%d with locality %d, primary osd%d\n", __func__,
1536 acting->osds[best_i], best_locality, acting->primary);
1537 return best_i;
1538 }
1539
1540 enum calc_target_result {
1541 CALC_TARGET_NO_ACTION = 0,
1542 CALC_TARGET_NEED_RESEND,
1543 CALC_TARGET_POOL_DNE,
1544 };
1545
1546 static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1547 struct ceph_osd_request_target *t,
1548 bool any_change)
1549 {
1550 struct ceph_pg_pool_info *pi;
1551 struct ceph_pg pgid, last_pgid;
1552 struct ceph_osds up, acting;
1553 bool is_read = t->flags & CEPH_OSD_FLAG_READ;
1554 bool is_write = t->flags & CEPH_OSD_FLAG_WRITE;
1555 bool force_resend = false;
1556 bool unpaused = false;
1557 bool legacy_change = false;
1558 bool split = false;
1559 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1560 bool recovery_deletes = ceph_osdmap_flag(osdc,
1561 CEPH_OSDMAP_RECOVERY_DELETES);
1562 enum calc_target_result ct_res;
1563
1564 t->epoch = osdc->osdmap->epoch;
1565 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1566 if (!pi) {
1567 t->osd = CEPH_HOMELESS_OSD;
1568 ct_res = CALC_TARGET_POOL_DNE;
1569 goto out;
1570 }
1571
1572 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1573 if (t->last_force_resend < pi->last_force_request_resend) {
1574 t->last_force_resend = pi->last_force_request_resend;
1575 force_resend = true;
1576 } else if (t->last_force_resend == 0) {
1577 force_resend = true;
1578 }
1579 }
1580
1581 /* apply tiering */
1582 ceph_oid_copy(&t->target_oid, &t->base_oid);
1583 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1584 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1585 if (is_read && pi->read_tier >= 0)
1586 t->target_oloc.pool = pi->read_tier;
1587 if (is_write && pi->write_tier >= 0)
1588 t->target_oloc.pool = pi->write_tier;
1589
1590 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1591 if (!pi) {
1592 t->osd = CEPH_HOMELESS_OSD;
1593 ct_res = CALC_TARGET_POOL_DNE;
1594 goto out;
1595 }
1596 }
1597
1598 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
1599 last_pgid.pool = pgid.pool;
1600 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1601
1602 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1603 if (any_change &&
1604 ceph_is_new_interval(&t->acting,
1605 &acting,
1606 &t->up,
1607 &up,
1608 t->size,
1609 pi->size,
1610 t->min_size,
1611 pi->min_size,
1612 t->pg_num,
1613 pi->pg_num,
1614 t->sort_bitwise,
1615 sort_bitwise,
1616 t->recovery_deletes,
1617 recovery_deletes,
1618 &last_pgid))
1619 force_resend = true;
1620
1621 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1622 t->paused = false;
1623 unpaused = true;
1624 }
1625 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1626 ceph_osds_changed(&t->acting, &acting,
1627 t->used_replica || any_change);
1628 if (t->pg_num)
1629 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1630
1631 if (legacy_change || force_resend || split) {
1632 t->pgid = pgid; /* struct */
1633 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1634 ceph_osds_copy(&t->acting, &acting);
1635 ceph_osds_copy(&t->up, &up);
1636 t->size = pi->size;
1637 t->min_size = pi->min_size;
1638 t->pg_num = pi->pg_num;
1639 t->pg_num_mask = pi->pg_num_mask;
1640 t->sort_bitwise = sort_bitwise;
1641 t->recovery_deletes = recovery_deletes;
1642
1643 if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS |
1644 CEPH_OSD_FLAG_LOCALIZE_READS)) &&
1645 !is_write && pi->type == CEPH_POOL_TYPE_REP &&
1646 acting.size > 1) {
1647 int pos;
1648
1649 WARN_ON(!is_read || acting.osds[0] != acting.primary);
1650 if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) {
1651 pos = pick_random_replica(&acting);
1652 } else {
1653 pos = pick_closest_replica(osdc, &acting);
1654 }
1655 t->osd = acting.osds[pos];
1656 t->used_replica = pos > 0;
1657 } else {
1658 t->osd = acting.primary;
1659 t->used_replica = false;
1660 }
1661 }
1662
1663 if (unpaused || legacy_change || force_resend || split)
1664 ct_res = CALC_TARGET_NEED_RESEND;
1665 else
1666 ct_res = CALC_TARGET_NO_ACTION;
1667
1668 out:
1669 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1670 legacy_change, force_resend, split, ct_res, t->osd);
1671 return ct_res;
1672 }
1673
1674 static struct ceph_spg_mapping *alloc_spg_mapping(void)
1675 {
1676 struct ceph_spg_mapping *spg;
1677
1678 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1679 if (!spg)
1680 return NULL;
1681
1682 RB_CLEAR_NODE(&spg->node);
1683 spg->backoffs = RB_ROOT;
1684 return spg;
1685 }
1686
1687 static void free_spg_mapping(struct ceph_spg_mapping *spg)
1688 {
1689 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1690 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1691
1692 kfree(spg);
1693 }
1694
1695 /*
1696 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1697 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1698 * defined only within a specific spgid; it does not pass anything to
1699 * children on split, or to another primary.
1700 */
1701 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1702 RB_BYPTR, const struct ceph_spg *, node)
1703
1704 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1705 {
1706 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1707 }
1708
1709 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1710 void **pkey, size_t *pkey_len)
1711 {
1712 if (hoid->key_len) {
1713 *pkey = hoid->key;
1714 *pkey_len = hoid->key_len;
1715 } else {
1716 *pkey = hoid->oid;
1717 *pkey_len = hoid->oid_len;
1718 }
1719 }
1720
1721 static int compare_names(const void *name1, size_t name1_len,
1722 const void *name2, size_t name2_len)
1723 {
1724 int ret;
1725
1726 ret = memcmp(name1, name2, min(name1_len, name2_len));
1727 if (!ret) {
1728 if (name1_len < name2_len)
1729 ret = -1;
1730 else if (name1_len > name2_len)
1731 ret = 1;
1732 }
1733 return ret;
1734 }
1735
1736 static int hoid_compare(const struct ceph_hobject_id *lhs,
1737 const struct ceph_hobject_id *rhs)
1738 {
1739 void *effective_key1, *effective_key2;
1740 size_t effective_key1_len, effective_key2_len;
1741 int ret;
1742
1743 if (lhs->is_max < rhs->is_max)
1744 return -1;
1745 if (lhs->is_max > rhs->is_max)
1746 return 1;
1747
1748 if (lhs->pool < rhs->pool)
1749 return -1;
1750 if (lhs->pool > rhs->pool)
1751 return 1;
1752
1753 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1754 return -1;
1755 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1756 return 1;
1757
1758 ret = compare_names(lhs->nspace, lhs->nspace_len,
1759 rhs->nspace, rhs->nspace_len);
1760 if (ret)
1761 return ret;
1762
1763 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1764 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1765 ret = compare_names(effective_key1, effective_key1_len,
1766 effective_key2, effective_key2_len);
1767 if (ret)
1768 return ret;
1769
1770 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1771 if (ret)
1772 return ret;
1773
1774 if (lhs->snapid < rhs->snapid)
1775 return -1;
1776 if (lhs->snapid > rhs->snapid)
1777 return 1;
1778
1779 return 0;
1780 }
1781
1782 /*
1783 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1784 * compat stuff here.
1785 *
1786 * Assumes @hoid is zero-initialized.
1787 */
1788 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1789 {
1790 u8 struct_v;
1791 u32 struct_len;
1792 int ret;
1793
1794 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1795 &struct_len);
1796 if (ret)
1797 return ret;
1798
1799 if (struct_v < 4) {
1800 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1801 goto e_inval;
1802 }
1803
1804 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1805 GFP_NOIO);
1806 if (IS_ERR(hoid->key)) {
1807 ret = PTR_ERR(hoid->key);
1808 hoid->key = NULL;
1809 return ret;
1810 }
1811
1812 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1813 GFP_NOIO);
1814 if (IS_ERR(hoid->oid)) {
1815 ret = PTR_ERR(hoid->oid);
1816 hoid->oid = NULL;
1817 return ret;
1818 }
1819
1820 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1821 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1822 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1823
1824 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1825 GFP_NOIO);
1826 if (IS_ERR(hoid->nspace)) {
1827 ret = PTR_ERR(hoid->nspace);
1828 hoid->nspace = NULL;
1829 return ret;
1830 }
1831
1832 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1833
1834 ceph_hoid_build_hash_cache(hoid);
1835 return 0;
1836
1837 e_inval:
1838 return -EINVAL;
1839 }
1840
1841 static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1842 {
1843 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1844 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1845 }
1846
1847 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1848 {
1849 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1850 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1851 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1852 ceph_encode_64(p, hoid->snapid);
1853 ceph_encode_32(p, hoid->hash);
1854 ceph_encode_8(p, hoid->is_max);
1855 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1856 ceph_encode_64(p, hoid->pool);
1857 }
1858
1859 static void free_hoid(struct ceph_hobject_id *hoid)
1860 {
1861 if (hoid) {
1862 kfree(hoid->key);
1863 kfree(hoid->oid);
1864 kfree(hoid->nspace);
1865 kfree(hoid);
1866 }
1867 }
1868
1869 static struct ceph_osd_backoff *alloc_backoff(void)
1870 {
1871 struct ceph_osd_backoff *backoff;
1872
1873 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1874 if (!backoff)
1875 return NULL;
1876
1877 RB_CLEAR_NODE(&backoff->spg_node);
1878 RB_CLEAR_NODE(&backoff->id_node);
1879 return backoff;
1880 }
1881
1882 static void free_backoff(struct ceph_osd_backoff *backoff)
1883 {
1884 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1885 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1886
1887 free_hoid(backoff->begin);
1888 free_hoid(backoff->end);
1889 kfree(backoff);
1890 }
1891
1892 /*
1893 * Within a specific spgid, backoffs are managed by ->begin hoid.
1894 */
1895 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1896 RB_BYVAL, spg_node);
1897
1898 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1899 const struct ceph_hobject_id *hoid)
1900 {
1901 struct rb_node *n = root->rb_node;
1902
1903 while (n) {
1904 struct ceph_osd_backoff *cur =
1905 rb_entry(n, struct ceph_osd_backoff, spg_node);
1906 int cmp;
1907
1908 cmp = hoid_compare(hoid, cur->begin);
1909 if (cmp < 0) {
1910 n = n->rb_left;
1911 } else if (cmp > 0) {
1912 if (hoid_compare(hoid, cur->end) < 0)
1913 return cur;
1914
1915 n = n->rb_right;
1916 } else {
1917 return cur;
1918 }
1919 }
1920
1921 return NULL;
1922 }
1923
1924 /*
1925 * Each backoff has a unique id within its OSD session.
1926 */
1927 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1928
1929 static void clear_backoffs(struct ceph_osd *osd)
1930 {
1931 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1932 struct ceph_spg_mapping *spg =
1933 rb_entry(rb_first(&osd->o_backoff_mappings),
1934 struct ceph_spg_mapping, node);
1935
1936 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1937 struct ceph_osd_backoff *backoff =
1938 rb_entry(rb_first(&spg->backoffs),
1939 struct ceph_osd_backoff, spg_node);
1940
1941 erase_backoff(&spg->backoffs, backoff);
1942 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1943 free_backoff(backoff);
1944 }
1945 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1946 free_spg_mapping(spg);
1947 }
1948 }
1949
1950 /*
1951 * Set up a temporary, non-owning view into @t.
1952 */
1953 static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1954 const struct ceph_osd_request_target *t)
1955 {
1956 hoid->key = NULL;
1957 hoid->key_len = 0;
1958 hoid->oid = t->target_oid.name;
1959 hoid->oid_len = t->target_oid.name_len;
1960 hoid->snapid = CEPH_NOSNAP;
1961 hoid->hash = t->pgid.seed;
1962 hoid->is_max = false;
1963 if (t->target_oloc.pool_ns) {
1964 hoid->nspace = t->target_oloc.pool_ns->str;
1965 hoid->nspace_len = t->target_oloc.pool_ns->len;
1966 } else {
1967 hoid->nspace = NULL;
1968 hoid->nspace_len = 0;
1969 }
1970 hoid->pool = t->target_oloc.pool;
1971 ceph_hoid_build_hash_cache(hoid);
1972 }
1973
1974 static bool should_plug_request(struct ceph_osd_request *req)
1975 {
1976 struct ceph_osd *osd = req->r_osd;
1977 struct ceph_spg_mapping *spg;
1978 struct ceph_osd_backoff *backoff;
1979 struct ceph_hobject_id hoid;
1980
1981 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1982 if (!spg)
1983 return false;
1984
1985 hoid_fill_from_target(&hoid, &req->r_t);
1986 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1987 if (!backoff)
1988 return false;
1989
1990 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1991 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1992 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1993 return true;
1994 }
1995
1996 /*
1997 * Keep get_num_data_items() in sync with this function.
1998 */
1999 static void setup_request_data(struct ceph_osd_request *req)
2000 {
2001 struct ceph_msg *request_msg = req->r_request;
2002 struct ceph_msg *reply_msg = req->r_reply;
2003 struct ceph_osd_req_op *op;
2004
2005 if (req->r_request->num_data_items || req->r_reply->num_data_items)
2006 return;
2007
2008 WARN_ON(request_msg->data_length || reply_msg->data_length);
2009 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
2010 switch (op->op) {
2011 /* request */
2012 case CEPH_OSD_OP_WRITE:
2013 case CEPH_OSD_OP_WRITEFULL:
2014 WARN_ON(op->indata_len != op->extent.length);
2015 ceph_osdc_msg_data_add(request_msg,
2016 &op->extent.osd_data);
2017 break;
2018 case CEPH_OSD_OP_SETXATTR:
2019 case CEPH_OSD_OP_CMPXATTR:
2020 WARN_ON(op->indata_len != op->xattr.name_len +
2021 op->xattr.value_len);
2022 ceph_osdc_msg_data_add(request_msg,
2023 &op->xattr.osd_data);
2024 break;
2025 case CEPH_OSD_OP_NOTIFY_ACK:
2026 ceph_osdc_msg_data_add(request_msg,
2027 &op->notify_ack.request_data);
2028 break;
2029 case CEPH_OSD_OP_COPY_FROM2:
2030 ceph_osdc_msg_data_add(request_msg,
2031 &op->copy_from.osd_data);
2032 break;
2033
2034 /* reply */
2035 case CEPH_OSD_OP_STAT:
2036 ceph_osdc_msg_data_add(reply_msg,
2037 &op->raw_data_in);
2038 break;
2039 case CEPH_OSD_OP_READ:
2040 ceph_osdc_msg_data_add(reply_msg,
2041 &op->extent.osd_data);
2042 break;
2043 case CEPH_OSD_OP_LIST_WATCHERS:
2044 ceph_osdc_msg_data_add(reply_msg,
2045 &op->list_watchers.response_data);
2046 break;
2047
2048 /* both */
2049 case CEPH_OSD_OP_CALL:
2050 WARN_ON(op->indata_len != op->cls.class_len +
2051 op->cls.method_len +
2052 op->cls.indata_len);
2053 ceph_osdc_msg_data_add(request_msg,
2054 &op->cls.request_info);
2055 /* optional, can be NONE */
2056 ceph_osdc_msg_data_add(request_msg,
2057 &op->cls.request_data);
2058 /* optional, can be NONE */
2059 ceph_osdc_msg_data_add(reply_msg,
2060 &op->cls.response_data);
2061 break;
2062 case CEPH_OSD_OP_NOTIFY:
2063 ceph_osdc_msg_data_add(request_msg,
2064 &op->notify.request_data);
2065 ceph_osdc_msg_data_add(reply_msg,
2066 &op->notify.response_data);
2067 break;
2068 }
2069 }
2070 }
2071
2072 static void encode_pgid(void **p, const struct ceph_pg *pgid)
2073 {
2074 ceph_encode_8(p, 1);
2075 ceph_encode_64(p, pgid->pool);
2076 ceph_encode_32(p, pgid->seed);
2077 ceph_encode_32(p, -1); /* preferred */
2078 }
2079
2080 static void encode_spgid(void **p, const struct ceph_spg *spgid)
2081 {
2082 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2083 encode_pgid(p, &spgid->pgid);
2084 ceph_encode_8(p, spgid->shard);
2085 }
2086
2087 static void encode_oloc(void **p, void *end,
2088 const struct ceph_object_locator *oloc)
2089 {
2090 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2091 ceph_encode_64(p, oloc->pool);
2092 ceph_encode_32(p, -1); /* preferred */
2093 ceph_encode_32(p, 0); /* key len */
2094 if (oloc->pool_ns)
2095 ceph_encode_string(p, end, oloc->pool_ns->str,
2096 oloc->pool_ns->len);
2097 else
2098 ceph_encode_32(p, 0);
2099 }
2100
2101 static void encode_request_partial(struct ceph_osd_request *req,
2102 struct ceph_msg *msg)
2103 {
2104 void *p = msg->front.iov_base;
2105 void *const end = p + msg->front_alloc_len;
2106 u32 data_len = 0;
2107 int i;
2108
2109 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2110 /* snapshots aren't writeable */
2111 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2112 } else {
2113 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2114 req->r_data_offset || req->r_snapc);
2115 }
2116
2117 setup_request_data(req);
2118
2119 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2120 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
2121 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2122 ceph_encode_32(&p, req->r_flags);
2123
2124 /* reqid */
2125 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2126 memset(p, 0, sizeof(struct ceph_osd_reqid));
2127 p += sizeof(struct ceph_osd_reqid);
2128
2129 /* trace */
2130 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2131 p += sizeof(struct ceph_blkin_trace_info);
2132
2133 ceph_encode_32(&p, 0); /* client_inc, always 0 */
2134 ceph_encode_timespec64(p, &req->r_mtime);
2135 p += sizeof(struct ceph_timespec);
2136
2137 encode_oloc(&p, end, &req->r_t.target_oloc);
2138 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2139 req->r_t.target_oid.name_len);
2140
2141 /* ops, can imply data */
2142 ceph_encode_16(&p, req->r_num_ops);
2143 for (i = 0; i < req->r_num_ops; i++) {
2144 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2145 p += sizeof(struct ceph_osd_op);
2146 }
2147
2148 ceph_encode_64(&p, req->r_snapid); /* snapid */
2149 if (req->r_snapc) {
2150 ceph_encode_64(&p, req->r_snapc->seq);
2151 ceph_encode_32(&p, req->r_snapc->num_snaps);
2152 for (i = 0; i < req->r_snapc->num_snaps; i++)
2153 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2154 } else {
2155 ceph_encode_64(&p, 0); /* snap_seq */
2156 ceph_encode_32(&p, 0); /* snaps len */
2157 }
2158
2159 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
2160 BUG_ON(p > end - 8); /* space for features */
2161
2162 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2163 /* front_len is finalized in encode_request_finish() */
2164 msg->front.iov_len = p - msg->front.iov_base;
2165 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2166 msg->hdr.data_len = cpu_to_le32(data_len);
2167 /*
2168 * The header "data_off" is a hint to the receiver allowing it
2169 * to align received data into its buffers such that there's no
2170 * need to re-copy it before writing it to disk (direct I/O).
2171 */
2172 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
2173
2174 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2175 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2176 }
2177
2178 static void encode_request_finish(struct ceph_msg *msg)
2179 {
2180 void *p = msg->front.iov_base;
2181 void *const partial_end = p + msg->front.iov_len;
2182 void *const end = p + msg->front_alloc_len;
2183
2184 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2185 /* luminous OSD -- encode features and be done */
2186 p = partial_end;
2187 ceph_encode_64(&p, msg->con->peer_features);
2188 } else {
2189 struct {
2190 char spgid[CEPH_ENCODING_START_BLK_LEN +
2191 CEPH_PGID_ENCODING_LEN + 1];
2192 __le32 hash;
2193 __le32 epoch;
2194 __le32 flags;
2195 char reqid[CEPH_ENCODING_START_BLK_LEN +
2196 sizeof(struct ceph_osd_reqid)];
2197 char trace[sizeof(struct ceph_blkin_trace_info)];
2198 __le32 client_inc;
2199 struct ceph_timespec mtime;
2200 } __packed head;
2201 struct ceph_pg pgid;
2202 void *oloc, *oid, *tail;
2203 int oloc_len, oid_len, tail_len;
2204 int len;
2205
2206 /*
2207 * Pre-luminous OSD -- reencode v8 into v4 using @head
2208 * as a temporary buffer. Encode the raw PG; the rest
2209 * is just a matter of moving oloc, oid and tail blobs
2210 * around.
2211 */
2212 memcpy(&head, p, sizeof(head));
2213 p += sizeof(head);
2214
2215 oloc = p;
2216 p += CEPH_ENCODING_START_BLK_LEN;
2217 pgid.pool = ceph_decode_64(&p);
2218 p += 4 + 4; /* preferred, key len */
2219 len = ceph_decode_32(&p);
2220 p += len; /* nspace */
2221 oloc_len = p - oloc;
2222
2223 oid = p;
2224 len = ceph_decode_32(&p);
2225 p += len;
2226 oid_len = p - oid;
2227
2228 tail = p;
2229 tail_len = partial_end - p;
2230
2231 p = msg->front.iov_base;
2232 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2233 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2234 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2235 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2236
2237 /* reassert_version */
2238 memset(p, 0, sizeof(struct ceph_eversion));
2239 p += sizeof(struct ceph_eversion);
2240
2241 BUG_ON(p >= oloc);
2242 memmove(p, oloc, oloc_len);
2243 p += oloc_len;
2244
2245 pgid.seed = le32_to_cpu(head.hash);
2246 encode_pgid(&p, &pgid); /* raw pg */
2247
2248 BUG_ON(p >= oid);
2249 memmove(p, oid, oid_len);
2250 p += oid_len;
2251
2252 /* tail -- ops, snapid, snapc, retry_attempt */
2253 BUG_ON(p >= tail);
2254 memmove(p, tail, tail_len);
2255 p += tail_len;
2256
2257 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2258 }
2259
2260 BUG_ON(p > end);
2261 msg->front.iov_len = p - msg->front.iov_base;
2262 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2263
2264 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2265 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2266 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2267 le16_to_cpu(msg->hdr.version));
2268 }
2269
2270 /*
2271 * @req has to be assigned a tid and registered.
2272 */
2273 static void send_request(struct ceph_osd_request *req)
2274 {
2275 struct ceph_osd *osd = req->r_osd;
2276
2277 verify_osd_locked(osd);
2278 WARN_ON(osd->o_osd != req->r_t.osd);
2279
2280 /* backoff? */
2281 if (should_plug_request(req))
2282 return;
2283
2284 /*
2285 * We may have a previously queued request message hanging
2286 * around. Cancel it to avoid corrupting the msgr.
2287 */
2288 if (req->r_sent)
2289 ceph_msg_revoke(req->r_request);
2290
2291 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2292 if (req->r_attempts)
2293 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2294 else
2295 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2296
2297 encode_request_partial(req, req->r_request);
2298
2299 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2300 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2301 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2302 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2303 req->r_attempts);
2304
2305 req->r_t.paused = false;
2306 req->r_stamp = jiffies;
2307 req->r_attempts++;
2308
2309 req->r_sent = osd->o_incarnation;
2310 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2311 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
2312 }
2313
2314 static void maybe_request_map(struct ceph_osd_client *osdc)
2315 {
2316 bool continuous = false;
2317
2318 verify_osdc_locked(osdc);
2319 WARN_ON(!osdc->osdmap->epoch);
2320
2321 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2322 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2323 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2324 dout("%s osdc %p continuous\n", __func__, osdc);
2325 continuous = true;
2326 } else {
2327 dout("%s osdc %p onetime\n", __func__, osdc);
2328 }
2329
2330 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2331 osdc->osdmap->epoch + 1, continuous))
2332 ceph_monc_renew_subs(&osdc->client->monc);
2333 }
2334
2335 static void complete_request(struct ceph_osd_request *req, int err);
2336 static void send_map_check(struct ceph_osd_request *req);
2337
2338 static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2339 {
2340 struct ceph_osd_client *osdc = req->r_osdc;
2341 struct ceph_osd *osd;
2342 enum calc_target_result ct_res;
2343 int err = 0;
2344 bool need_send = false;
2345 bool promoted = false;
2346
2347 WARN_ON(req->r_tid);
2348 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2349
2350 again:
2351 ct_res = calc_target(osdc, &req->r_t, false);
2352 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2353 goto promote;
2354
2355 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2356 if (IS_ERR(osd)) {
2357 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2358 goto promote;
2359 }
2360
2361 if (osdc->abort_err) {
2362 dout("req %p abort_err %d\n", req, osdc->abort_err);
2363 err = osdc->abort_err;
2364 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2365 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2366 osdc->epoch_barrier);
2367 req->r_t.paused = true;
2368 maybe_request_map(osdc);
2369 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2370 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2371 dout("req %p pausewr\n", req);
2372 req->r_t.paused = true;
2373 maybe_request_map(osdc);
2374 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2375 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2376 dout("req %p pauserd\n", req);
2377 req->r_t.paused = true;
2378 maybe_request_map(osdc);
2379 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2380 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2381 CEPH_OSD_FLAG_FULL_FORCE)) &&
2382 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2383 pool_full(osdc, req->r_t.base_oloc.pool))) {
2384 dout("req %p full/pool_full\n", req);
2385 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
2386 err = -ENOSPC;
2387 } else {
2388 pr_warn_ratelimited("FULL or reached pool quota\n");
2389 req->r_t.paused = true;
2390 maybe_request_map(osdc);
2391 }
2392 } else if (!osd_homeless(osd)) {
2393 need_send = true;
2394 } else {
2395 maybe_request_map(osdc);
2396 }
2397
2398 mutex_lock(&osd->lock);
2399 /*
2400 * Assign the tid atomically with send_request() to protect
2401 * multiple writes to the same object from racing with each
2402 * other, resulting in out of order ops on the OSDs.
2403 */
2404 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2405 link_request(osd, req);
2406 if (need_send)
2407 send_request(req);
2408 else if (err)
2409 complete_request(req, err);
2410 mutex_unlock(&osd->lock);
2411
2412 if (!err && ct_res == CALC_TARGET_POOL_DNE)
2413 send_map_check(req);
2414
2415 if (promoted)
2416 downgrade_write(&osdc->lock);
2417 return;
2418
2419 promote:
2420 up_read(&osdc->lock);
2421 down_write(&osdc->lock);
2422 wrlocked = true;
2423 promoted = true;
2424 goto again;
2425 }
2426
2427 static void account_request(struct ceph_osd_request *req)
2428 {
2429 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
2430 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2431
2432 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2433 atomic_inc(&req->r_osdc->num_requests);
2434
2435 req->r_start_stamp = jiffies;
2436 req->r_start_latency = ktime_get();
2437 }
2438
2439 static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2440 {
2441 ceph_osdc_get_request(req);
2442 account_request(req);
2443 __submit_request(req, wrlocked);
2444 }
2445
2446 static void finish_request(struct ceph_osd_request *req)
2447 {
2448 struct ceph_osd_client *osdc = req->r_osdc;
2449
2450 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2451 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2452
2453 req->r_end_latency = ktime_get();
2454
2455 if (req->r_osd)
2456 unlink_request(req->r_osd, req);
2457 atomic_dec(&osdc->num_requests);
2458
2459 /*
2460 * If an OSD has failed or returned and a request has been sent
2461 * twice, it's possible to get a reply and end up here while the
2462 * request message is queued for delivery. We will ignore the
2463 * reply, so not a big deal, but better to try and catch it.
2464 */
2465 ceph_msg_revoke(req->r_request);
2466 ceph_msg_revoke_incoming(req->r_reply);
2467 }
2468
2469 static void __complete_request(struct ceph_osd_request *req)
2470 {
2471 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
2472 req->r_tid, req->r_callback, req->r_result);
2473
2474 if (req->r_callback)
2475 req->r_callback(req);
2476 complete_all(&req->r_completion);
2477 ceph_osdc_put_request(req);
2478 }
2479
2480 static void complete_request_workfn(struct work_struct *work)
2481 {
2482 struct ceph_osd_request *req =
2483 container_of(work, struct ceph_osd_request, r_complete_work);
2484
2485 __complete_request(req);
2486 }
2487
2488 /*
2489 * This is open-coded in handle_reply().
2490 */
2491 static void complete_request(struct ceph_osd_request *req, int err)
2492 {
2493 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2494
2495 req->r_result = err;
2496 finish_request(req);
2497
2498 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2499 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
2500 }
2501
2502 static void cancel_map_check(struct ceph_osd_request *req)
2503 {
2504 struct ceph_osd_client *osdc = req->r_osdc;
2505 struct ceph_osd_request *lookup_req;
2506
2507 verify_osdc_wrlocked(osdc);
2508
2509 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2510 if (!lookup_req)
2511 return;
2512
2513 WARN_ON(lookup_req != req);
2514 erase_request_mc(&osdc->map_checks, req);
2515 ceph_osdc_put_request(req);
2516 }
2517
2518 static void cancel_request(struct ceph_osd_request *req)
2519 {
2520 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2521
2522 cancel_map_check(req);
2523 finish_request(req);
2524 complete_all(&req->r_completion);
2525 ceph_osdc_put_request(req);
2526 }
2527
2528 static void abort_request(struct ceph_osd_request *req, int err)
2529 {
2530 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2531
2532 cancel_map_check(req);
2533 complete_request(req, err);
2534 }
2535
2536 static int abort_fn(struct ceph_osd_request *req, void *arg)
2537 {
2538 int err = *(int *)arg;
2539
2540 abort_request(req, err);
2541 return 0; /* continue iteration */
2542 }
2543
2544 /*
2545 * Abort all in-flight requests with @err and arrange for all future
2546 * requests to be failed immediately.
2547 */
2548 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2549 {
2550 dout("%s osdc %p err %d\n", __func__, osdc, err);
2551 down_write(&osdc->lock);
2552 for_each_request(osdc, abort_fn, &err);
2553 osdc->abort_err = err;
2554 up_write(&osdc->lock);
2555 }
2556 EXPORT_SYMBOL(ceph_osdc_abort_requests);
2557
2558 void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc)
2559 {
2560 down_write(&osdc->lock);
2561 osdc->abort_err = 0;
2562 up_write(&osdc->lock);
2563 }
2564 EXPORT_SYMBOL(ceph_osdc_clear_abort_err);
2565
2566 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2567 {
2568 if (likely(eb > osdc->epoch_barrier)) {
2569 dout("updating epoch_barrier from %u to %u\n",
2570 osdc->epoch_barrier, eb);
2571 osdc->epoch_barrier = eb;
2572 /* Request map if we're not to the barrier yet */
2573 if (eb > osdc->osdmap->epoch)
2574 maybe_request_map(osdc);
2575 }
2576 }
2577
2578 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2579 {
2580 down_read(&osdc->lock);
2581 if (unlikely(eb > osdc->epoch_barrier)) {
2582 up_read(&osdc->lock);
2583 down_write(&osdc->lock);
2584 update_epoch_barrier(osdc, eb);
2585 up_write(&osdc->lock);
2586 } else {
2587 up_read(&osdc->lock);
2588 }
2589 }
2590 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2591
2592 /*
2593 * We can end up releasing caps as a result of abort_request().
2594 * In that case, we probably want to ensure that the cap release message
2595 * has an updated epoch barrier in it, so set the epoch barrier prior to
2596 * aborting the first request.
2597 */
2598 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2599 {
2600 struct ceph_osd_client *osdc = req->r_osdc;
2601 bool *victims = arg;
2602
2603 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2604 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2605 pool_full(osdc, req->r_t.base_oloc.pool))) {
2606 if (!*victims) {
2607 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2608 *victims = true;
2609 }
2610 abort_request(req, -ENOSPC);
2611 }
2612
2613 return 0; /* continue iteration */
2614 }
2615
2616 /*
2617 * Drop all pending requests that are stalled waiting on a full condition to
2618 * clear, and complete them with ENOSPC as the return code. Set the
2619 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2620 * cancelled.
2621 */
2622 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2623 {
2624 bool victims = false;
2625
2626 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
2627 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
2628 for_each_request(osdc, abort_on_full_fn, &victims);
2629 }
2630
2631 static void check_pool_dne(struct ceph_osd_request *req)
2632 {
2633 struct ceph_osd_client *osdc = req->r_osdc;
2634 struct ceph_osdmap *map = osdc->osdmap;
2635
2636 verify_osdc_wrlocked(osdc);
2637 WARN_ON(!map->epoch);
2638
2639 if (req->r_attempts) {
2640 /*
2641 * We sent a request earlier, which means that
2642 * previously the pool existed, and now it does not
2643 * (i.e., it was deleted).
2644 */
2645 req->r_map_dne_bound = map->epoch;
2646 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2647 req->r_tid);
2648 } else {
2649 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2650 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2651 }
2652
2653 if (req->r_map_dne_bound) {
2654 if (map->epoch >= req->r_map_dne_bound) {
2655 /* we had a new enough map */
2656 pr_info_ratelimited("tid %llu pool does not exist\n",
2657 req->r_tid);
2658 complete_request(req, -ENOENT);
2659 }
2660 } else {
2661 send_map_check(req);
2662 }
2663 }
2664
2665 static void map_check_cb(struct ceph_mon_generic_request *greq)
2666 {
2667 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2668 struct ceph_osd_request *req;
2669 u64 tid = greq->private_data;
2670
2671 WARN_ON(greq->result || !greq->u.newest);
2672
2673 down_write(&osdc->lock);
2674 req = lookup_request_mc(&osdc->map_checks, tid);
2675 if (!req) {
2676 dout("%s tid %llu dne\n", __func__, tid);
2677 goto out_unlock;
2678 }
2679
2680 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2681 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2682 if (!req->r_map_dne_bound)
2683 req->r_map_dne_bound = greq->u.newest;
2684 erase_request_mc(&osdc->map_checks, req);
2685 check_pool_dne(req);
2686
2687 ceph_osdc_put_request(req);
2688 out_unlock:
2689 up_write(&osdc->lock);
2690 }
2691
2692 static void send_map_check(struct ceph_osd_request *req)
2693 {
2694 struct ceph_osd_client *osdc = req->r_osdc;
2695 struct ceph_osd_request *lookup_req;
2696 int ret;
2697
2698 verify_osdc_wrlocked(osdc);
2699
2700 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2701 if (lookup_req) {
2702 WARN_ON(lookup_req != req);
2703 return;
2704 }
2705
2706 ceph_osdc_get_request(req);
2707 insert_request_mc(&osdc->map_checks, req);
2708 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2709 map_check_cb, req->r_tid);
2710 WARN_ON(ret);
2711 }
2712
2713 /*
2714 * lingering requests, watch/notify v2 infrastructure
2715 */
2716 static void linger_release(struct kref *kref)
2717 {
2718 struct ceph_osd_linger_request *lreq =
2719 container_of(kref, struct ceph_osd_linger_request, kref);
2720
2721 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2722 lreq->reg_req, lreq->ping_req);
2723 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2724 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
2725 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2726 WARN_ON(!list_empty(&lreq->scan_item));
2727 WARN_ON(!list_empty(&lreq->pending_lworks));
2728 WARN_ON(lreq->osd);
2729
2730 if (lreq->reg_req)
2731 ceph_osdc_put_request(lreq->reg_req);
2732 if (lreq->ping_req)
2733 ceph_osdc_put_request(lreq->ping_req);
2734 target_destroy(&lreq->t);
2735 kfree(lreq);
2736 }
2737
2738 static void linger_put(struct ceph_osd_linger_request *lreq)
2739 {
2740 if (lreq)
2741 kref_put(&lreq->kref, linger_release);
2742 }
2743
2744 static struct ceph_osd_linger_request *
2745 linger_get(struct ceph_osd_linger_request *lreq)
2746 {
2747 kref_get(&lreq->kref);
2748 return lreq;
2749 }
2750
2751 static struct ceph_osd_linger_request *
2752 linger_alloc(struct ceph_osd_client *osdc)
2753 {
2754 struct ceph_osd_linger_request *lreq;
2755
2756 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2757 if (!lreq)
2758 return NULL;
2759
2760 kref_init(&lreq->kref);
2761 mutex_init(&lreq->lock);
2762 RB_CLEAR_NODE(&lreq->node);
2763 RB_CLEAR_NODE(&lreq->osdc_node);
2764 RB_CLEAR_NODE(&lreq->mc_node);
2765 INIT_LIST_HEAD(&lreq->scan_item);
2766 INIT_LIST_HEAD(&lreq->pending_lworks);
2767 init_completion(&lreq->reg_commit_wait);
2768 init_completion(&lreq->notify_finish_wait);
2769
2770 lreq->osdc = osdc;
2771 target_init(&lreq->t);
2772
2773 dout("%s lreq %p\n", __func__, lreq);
2774 return lreq;
2775 }
2776
2777 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2778 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
2779 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2780
2781 /*
2782 * Create linger request <-> OSD session relation.
2783 *
2784 * @lreq has to be registered, @osd may be homeless.
2785 */
2786 static void link_linger(struct ceph_osd *osd,
2787 struct ceph_osd_linger_request *lreq)
2788 {
2789 verify_osd_locked(osd);
2790 WARN_ON(!lreq->linger_id || lreq->osd);
2791 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2792 osd->o_osd, lreq, lreq->linger_id);
2793
2794 if (!osd_homeless(osd))
2795 __remove_osd_from_lru(osd);
2796 else
2797 atomic_inc(&osd->o_osdc->num_homeless);
2798
2799 get_osd(osd);
2800 insert_linger(&osd->o_linger_requests, lreq);
2801 lreq->osd = osd;
2802 }
2803
2804 static void unlink_linger(struct ceph_osd *osd,
2805 struct ceph_osd_linger_request *lreq)
2806 {
2807 verify_osd_locked(osd);
2808 WARN_ON(lreq->osd != osd);
2809 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2810 osd->o_osd, lreq, lreq->linger_id);
2811
2812 lreq->osd = NULL;
2813 erase_linger(&osd->o_linger_requests, lreq);
2814 put_osd(osd);
2815
2816 if (!osd_homeless(osd))
2817 maybe_move_osd_to_lru(osd);
2818 else
2819 atomic_dec(&osd->o_osdc->num_homeless);
2820 }
2821
2822 static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2823 {
2824 verify_osdc_locked(lreq->osdc);
2825
2826 return !RB_EMPTY_NODE(&lreq->osdc_node);
2827 }
2828
2829 static bool linger_registered(struct ceph_osd_linger_request *lreq)
2830 {
2831 struct ceph_osd_client *osdc = lreq->osdc;
2832 bool registered;
2833
2834 down_read(&osdc->lock);
2835 registered = __linger_registered(lreq);
2836 up_read(&osdc->lock);
2837
2838 return registered;
2839 }
2840
2841 static void linger_register(struct ceph_osd_linger_request *lreq)
2842 {
2843 struct ceph_osd_client *osdc = lreq->osdc;
2844
2845 verify_osdc_wrlocked(osdc);
2846 WARN_ON(lreq->linger_id);
2847
2848 linger_get(lreq);
2849 lreq->linger_id = ++osdc->last_linger_id;
2850 insert_linger_osdc(&osdc->linger_requests, lreq);
2851 }
2852
2853 static void linger_unregister(struct ceph_osd_linger_request *lreq)
2854 {
2855 struct ceph_osd_client *osdc = lreq->osdc;
2856
2857 verify_osdc_wrlocked(osdc);
2858
2859 erase_linger_osdc(&osdc->linger_requests, lreq);
2860 linger_put(lreq);
2861 }
2862
2863 static void cancel_linger_request(struct ceph_osd_request *req)
2864 {
2865 struct ceph_osd_linger_request *lreq = req->r_priv;
2866
2867 WARN_ON(!req->r_linger);
2868 cancel_request(req);
2869 linger_put(lreq);
2870 }
2871
2872 struct linger_work {
2873 struct work_struct work;
2874 struct ceph_osd_linger_request *lreq;
2875 struct list_head pending_item;
2876 unsigned long queued_stamp;
2877
2878 union {
2879 struct {
2880 u64 notify_id;
2881 u64 notifier_id;
2882 void *payload; /* points into @msg front */
2883 size_t payload_len;
2884
2885 struct ceph_msg *msg; /* for ceph_msg_put() */
2886 } notify;
2887 struct {
2888 int err;
2889 } error;
2890 };
2891 };
2892
2893 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2894 work_func_t workfn)
2895 {
2896 struct linger_work *lwork;
2897
2898 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2899 if (!lwork)
2900 return NULL;
2901
2902 INIT_WORK(&lwork->work, workfn);
2903 INIT_LIST_HEAD(&lwork->pending_item);
2904 lwork->lreq = linger_get(lreq);
2905
2906 return lwork;
2907 }
2908
2909 static void lwork_free(struct linger_work *lwork)
2910 {
2911 struct ceph_osd_linger_request *lreq = lwork->lreq;
2912
2913 mutex_lock(&lreq->lock);
2914 list_del(&lwork->pending_item);
2915 mutex_unlock(&lreq->lock);
2916
2917 linger_put(lreq);
2918 kfree(lwork);
2919 }
2920
2921 static void lwork_queue(struct linger_work *lwork)
2922 {
2923 struct ceph_osd_linger_request *lreq = lwork->lreq;
2924 struct ceph_osd_client *osdc = lreq->osdc;
2925
2926 verify_lreq_locked(lreq);
2927 WARN_ON(!list_empty(&lwork->pending_item));
2928
2929 lwork->queued_stamp = jiffies;
2930 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2931 queue_work(osdc->notify_wq, &lwork->work);
2932 }
2933
2934 static void do_watch_notify(struct work_struct *w)
2935 {
2936 struct linger_work *lwork = container_of(w, struct linger_work, work);
2937 struct ceph_osd_linger_request *lreq = lwork->lreq;
2938
2939 if (!linger_registered(lreq)) {
2940 dout("%s lreq %p not registered\n", __func__, lreq);
2941 goto out;
2942 }
2943
2944 WARN_ON(!lreq->is_watch);
2945 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2946 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2947 lwork->notify.payload_len);
2948 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2949 lwork->notify.notifier_id, lwork->notify.payload,
2950 lwork->notify.payload_len);
2951
2952 out:
2953 ceph_msg_put(lwork->notify.msg);
2954 lwork_free(lwork);
2955 }
2956
2957 static void do_watch_error(struct work_struct *w)
2958 {
2959 struct linger_work *lwork = container_of(w, struct linger_work, work);
2960 struct ceph_osd_linger_request *lreq = lwork->lreq;
2961
2962 if (!linger_registered(lreq)) {
2963 dout("%s lreq %p not registered\n", __func__, lreq);
2964 goto out;
2965 }
2966
2967 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2968 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2969
2970 out:
2971 lwork_free(lwork);
2972 }
2973
2974 static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2975 {
2976 struct linger_work *lwork;
2977
2978 lwork = lwork_alloc(lreq, do_watch_error);
2979 if (!lwork) {
2980 pr_err("failed to allocate error-lwork\n");
2981 return;
2982 }
2983
2984 lwork->error.err = lreq->last_error;
2985 lwork_queue(lwork);
2986 }
2987
2988 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2989 int result)
2990 {
2991 if (!completion_done(&lreq->reg_commit_wait)) {
2992 lreq->reg_commit_error = (result <= 0 ? result : 0);
2993 complete_all(&lreq->reg_commit_wait);
2994 }
2995 }
2996
2997 static void linger_commit_cb(struct ceph_osd_request *req)
2998 {
2999 struct ceph_osd_linger_request *lreq = req->r_priv;
3000
3001 mutex_lock(&lreq->lock);
3002 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
3003 lreq->linger_id, req->r_result);
3004 linger_reg_commit_complete(lreq, req->r_result);
3005 lreq->committed = true;
3006
3007 if (!lreq->is_watch) {
3008 struct ceph_osd_data *osd_data =
3009 osd_req_op_data(req, 0, notify, response_data);
3010 void *p = page_address(osd_data->pages[0]);
3011
3012 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
3013 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
3014
3015 /* make note of the notify_id */
3016 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
3017 lreq->notify_id = ceph_decode_64(&p);
3018 dout("lreq %p notify_id %llu\n", lreq,
3019 lreq->notify_id);
3020 } else {
3021 dout("lreq %p no notify_id\n", lreq);
3022 }
3023 }
3024
3025 mutex_unlock(&lreq->lock);
3026 linger_put(lreq);
3027 }
3028
3029 static int normalize_watch_error(int err)
3030 {
3031 /*
3032 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
3033 * notification and a failure to reconnect because we raced with
3034 * the delete appear the same to the user.
3035 */
3036 if (err == -ENOENT)
3037 err = -ENOTCONN;
3038
3039 return err;
3040 }
3041
3042 static void linger_reconnect_cb(struct ceph_osd_request *req)
3043 {
3044 struct ceph_osd_linger_request *lreq = req->r_priv;
3045
3046 mutex_lock(&lreq->lock);
3047 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
3048 lreq, lreq->linger_id, req->r_result, lreq->last_error);
3049 if (req->r_result < 0) {
3050 if (!lreq->last_error) {
3051 lreq->last_error = normalize_watch_error(req->r_result);
3052 queue_watch_error(lreq);
3053 }
3054 }
3055
3056 mutex_unlock(&lreq->lock);
3057 linger_put(lreq);
3058 }
3059
3060 static void send_linger(struct ceph_osd_linger_request *lreq)
3061 {
3062 struct ceph_osd_request *req = lreq->reg_req;
3063 struct ceph_osd_req_op *op = &req->r_ops[0];
3064
3065 verify_osdc_wrlocked(req->r_osdc);
3066 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3067
3068 if (req->r_osd)
3069 cancel_linger_request(req);
3070
3071 request_reinit(req);
3072 target_copy(&req->r_t, &lreq->t);
3073 req->r_mtime = lreq->mtime;
3074
3075 mutex_lock(&lreq->lock);
3076 if (lreq->is_watch && lreq->committed) {
3077 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3078 op->watch.cookie != lreq->linger_id);
3079 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
3080 op->watch.gen = ++lreq->register_gen;
3081 dout("lreq %p reconnect register_gen %u\n", lreq,
3082 op->watch.gen);
3083 req->r_callback = linger_reconnect_cb;
3084 } else {
3085 if (!lreq->is_watch)
3086 lreq->notify_id = 0;
3087 else
3088 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
3089 dout("lreq %p register\n", lreq);
3090 req->r_callback = linger_commit_cb;
3091 }
3092 mutex_unlock(&lreq->lock);
3093
3094 req->r_priv = linger_get(lreq);
3095 req->r_linger = true;
3096
3097 submit_request(req, true);
3098 }
3099
3100 static void linger_ping_cb(struct ceph_osd_request *req)
3101 {
3102 struct ceph_osd_linger_request *lreq = req->r_priv;
3103
3104 mutex_lock(&lreq->lock);
3105 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3106 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3107 lreq->last_error);
3108 if (lreq->register_gen == req->r_ops[0].watch.gen) {
3109 if (!req->r_result) {
3110 lreq->watch_valid_thru = lreq->ping_sent;
3111 } else if (!lreq->last_error) {
3112 lreq->last_error = normalize_watch_error(req->r_result);
3113 queue_watch_error(lreq);
3114 }
3115 } else {
3116 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3117 lreq->register_gen, req->r_ops[0].watch.gen);
3118 }
3119
3120 mutex_unlock(&lreq->lock);
3121 linger_put(lreq);
3122 }
3123
3124 static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3125 {
3126 struct ceph_osd_client *osdc = lreq->osdc;
3127 struct ceph_osd_request *req = lreq->ping_req;
3128 struct ceph_osd_req_op *op = &req->r_ops[0];
3129
3130 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
3131 dout("%s PAUSERD\n", __func__);
3132 return;
3133 }
3134
3135 lreq->ping_sent = jiffies;
3136 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3137 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3138 lreq->register_gen);
3139
3140 if (req->r_osd)
3141 cancel_linger_request(req);
3142
3143 request_reinit(req);
3144 target_copy(&req->r_t, &lreq->t);
3145
3146 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3147 op->watch.cookie != lreq->linger_id ||
3148 op->watch.op != CEPH_OSD_WATCH_OP_PING);
3149 op->watch.gen = lreq->register_gen;
3150 req->r_callback = linger_ping_cb;
3151 req->r_priv = linger_get(lreq);
3152 req->r_linger = true;
3153
3154 ceph_osdc_get_request(req);
3155 account_request(req);
3156 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3157 link_request(lreq->osd, req);
3158 send_request(req);
3159 }
3160
3161 static void linger_submit(struct ceph_osd_linger_request *lreq)
3162 {
3163 struct ceph_osd_client *osdc = lreq->osdc;
3164 struct ceph_osd *osd;
3165
3166 down_write(&osdc->lock);
3167 linger_register(lreq);
3168 if (lreq->is_watch) {
3169 lreq->reg_req->r_ops[0].watch.cookie = lreq->linger_id;
3170 lreq->ping_req->r_ops[0].watch.cookie = lreq->linger_id;
3171 } else {
3172 lreq->reg_req->r_ops[0].notify.cookie = lreq->linger_id;
3173 }
3174
3175 calc_target(osdc, &lreq->t, false);
3176 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3177 link_linger(osd, lreq);
3178
3179 send_linger(lreq);
3180 up_write(&osdc->lock);
3181 }
3182
3183 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3184 {
3185 struct ceph_osd_client *osdc = lreq->osdc;
3186 struct ceph_osd_linger_request *lookup_lreq;
3187
3188 verify_osdc_wrlocked(osdc);
3189
3190 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3191 lreq->linger_id);
3192 if (!lookup_lreq)
3193 return;
3194
3195 WARN_ON(lookup_lreq != lreq);
3196 erase_linger_mc(&osdc->linger_map_checks, lreq);
3197 linger_put(lreq);
3198 }
3199
3200 /*
3201 * @lreq has to be both registered and linked.
3202 */
3203 static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3204 {
3205 if (lreq->is_watch && lreq->ping_req->r_osd)
3206 cancel_linger_request(lreq->ping_req);
3207 if (lreq->reg_req->r_osd)
3208 cancel_linger_request(lreq->reg_req);
3209 cancel_linger_map_check(lreq);
3210 unlink_linger(lreq->osd, lreq);
3211 linger_unregister(lreq);
3212 }
3213
3214 static void linger_cancel(struct ceph_osd_linger_request *lreq)
3215 {
3216 struct ceph_osd_client *osdc = lreq->osdc;
3217
3218 down_write(&osdc->lock);
3219 if (__linger_registered(lreq))
3220 __linger_cancel(lreq);
3221 up_write(&osdc->lock);
3222 }
3223
3224 static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3225
3226 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3227 {
3228 struct ceph_osd_client *osdc = lreq->osdc;
3229 struct ceph_osdmap *map = osdc->osdmap;
3230
3231 verify_osdc_wrlocked(osdc);
3232 WARN_ON(!map->epoch);
3233
3234 if (lreq->register_gen) {
3235 lreq->map_dne_bound = map->epoch;
3236 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3237 lreq, lreq->linger_id);
3238 } else {
3239 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3240 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3241 map->epoch);
3242 }
3243
3244 if (lreq->map_dne_bound) {
3245 if (map->epoch >= lreq->map_dne_bound) {
3246 /* we had a new enough map */
3247 pr_info("linger_id %llu pool does not exist\n",
3248 lreq->linger_id);
3249 linger_reg_commit_complete(lreq, -ENOENT);
3250 __linger_cancel(lreq);
3251 }
3252 } else {
3253 send_linger_map_check(lreq);
3254 }
3255 }
3256
3257 static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3258 {
3259 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3260 struct ceph_osd_linger_request *lreq;
3261 u64 linger_id = greq->private_data;
3262
3263 WARN_ON(greq->result || !greq->u.newest);
3264
3265 down_write(&osdc->lock);
3266 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3267 if (!lreq) {
3268 dout("%s linger_id %llu dne\n", __func__, linger_id);
3269 goto out_unlock;
3270 }
3271
3272 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3273 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3274 greq->u.newest);
3275 if (!lreq->map_dne_bound)
3276 lreq->map_dne_bound = greq->u.newest;
3277 erase_linger_mc(&osdc->linger_map_checks, lreq);
3278 check_linger_pool_dne(lreq);
3279
3280 linger_put(lreq);
3281 out_unlock:
3282 up_write(&osdc->lock);
3283 }
3284
3285 static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3286 {
3287 struct ceph_osd_client *osdc = lreq->osdc;
3288 struct ceph_osd_linger_request *lookup_lreq;
3289 int ret;
3290
3291 verify_osdc_wrlocked(osdc);
3292
3293 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3294 lreq->linger_id);
3295 if (lookup_lreq) {
3296 WARN_ON(lookup_lreq != lreq);
3297 return;
3298 }
3299
3300 linger_get(lreq);
3301 insert_linger_mc(&osdc->linger_map_checks, lreq);
3302 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3303 linger_map_check_cb, lreq->linger_id);
3304 WARN_ON(ret);
3305 }
3306
3307 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3308 {
3309 int ret;
3310
3311 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3312 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3313 return ret ?: lreq->reg_commit_error;
3314 }
3315
3316 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3317 {
3318 int ret;
3319
3320 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3321 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3322 return ret ?: lreq->notify_finish_error;
3323 }
3324
3325 /*
3326 * Timeout callback, called every N seconds. When 1 or more OSD
3327 * requests has been active for more than N seconds, we send a keepalive
3328 * (tag + timestamp) to its OSD to ensure any communications channel
3329 * reset is detected.
3330 */
3331 static void handle_timeout(struct work_struct *work)
3332 {
3333 struct ceph_osd_client *osdc =
3334 container_of(work, struct ceph_osd_client, timeout_work.work);
3335 struct ceph_options *opts = osdc->client->options;
3336 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3337 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3338 LIST_HEAD(slow_osds);
3339 struct rb_node *n, *p;
3340
3341 dout("%s osdc %p\n", __func__, osdc);
3342 down_write(&osdc->lock);
3343
3344 /*
3345 * ping osds that are a bit slow. this ensures that if there
3346 * is a break in the TCP connection we will notice, and reopen
3347 * a connection with that osd (from the fault callback).
3348 */
3349 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3350 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3351 bool found = false;
3352
3353 for (p = rb_first(&osd->o_requests); p; ) {
3354 struct ceph_osd_request *req =
3355 rb_entry(p, struct ceph_osd_request, r_node);
3356
3357 p = rb_next(p); /* abort_request() */
3358
3359 if (time_before(req->r_stamp, cutoff)) {
3360 dout(" req %p tid %llu on osd%d is laggy\n",
3361 req, req->r_tid, osd->o_osd);
3362 found = true;
3363 }
3364 if (opts->osd_request_timeout &&
3365 time_before(req->r_start_stamp, expiry_cutoff)) {
3366 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3367 req->r_tid, osd->o_osd);
3368 abort_request(req, -ETIMEDOUT);
3369 }
3370 }
3371 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3372 struct ceph_osd_linger_request *lreq =
3373 rb_entry(p, struct ceph_osd_linger_request, node);
3374
3375 dout(" lreq %p linger_id %llu is served by osd%d\n",
3376 lreq, lreq->linger_id, osd->o_osd);
3377 found = true;
3378
3379 mutex_lock(&lreq->lock);
3380 if (lreq->is_watch && lreq->committed && !lreq->last_error)
3381 send_linger_ping(lreq);
3382 mutex_unlock(&lreq->lock);
3383 }
3384
3385 if (found)
3386 list_move_tail(&osd->o_keepalive_item, &slow_osds);
3387 }
3388
3389 if (opts->osd_request_timeout) {
3390 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3391 struct ceph_osd_request *req =
3392 rb_entry(p, struct ceph_osd_request, r_node);
3393
3394 p = rb_next(p); /* abort_request() */
3395
3396 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3397 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3398 req->r_tid, osdc->homeless_osd.o_osd);
3399 abort_request(req, -ETIMEDOUT);
3400 }
3401 }
3402 }
3403
3404 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3405 maybe_request_map(osdc);
3406
3407 while (!list_empty(&slow_osds)) {
3408 struct ceph_osd *osd = list_first_entry(&slow_osds,
3409 struct ceph_osd,
3410 o_keepalive_item);
3411 list_del_init(&osd->o_keepalive_item);
3412 ceph_con_keepalive(&osd->o_con);
3413 }
3414
3415 up_write(&osdc->lock);
3416 schedule_delayed_work(&osdc->timeout_work,
3417 osdc->client->options->osd_keepalive_timeout);
3418 }
3419
3420 static void handle_osds_timeout(struct work_struct *work)
3421 {
3422 struct ceph_osd_client *osdc =
3423 container_of(work, struct ceph_osd_client,
3424 osds_timeout_work.work);
3425 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3426 struct ceph_osd *osd, *nosd;
3427
3428 dout("%s osdc %p\n", __func__, osdc);
3429 down_write(&osdc->lock);
3430 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3431 if (time_before(jiffies, osd->lru_ttl))
3432 break;
3433
3434 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3435 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3436 close_osd(osd);
3437 }
3438
3439 up_write(&osdc->lock);
3440 schedule_delayed_work(&osdc->osds_timeout_work,
3441 round_jiffies_relative(delay));
3442 }
3443
3444 static int ceph_oloc_decode(void **p, void *end,
3445 struct ceph_object_locator *oloc)
3446 {
3447 u8 struct_v, struct_cv;
3448 u32 len;
3449 void *struct_end;
3450 int ret = 0;
3451
3452 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3453 struct_v = ceph_decode_8(p);
3454 struct_cv = ceph_decode_8(p);
3455 if (struct_v < 3) {
3456 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3457 struct_v, struct_cv);
3458 goto e_inval;
3459 }
3460 if (struct_cv > 6) {
3461 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3462 struct_v, struct_cv);
3463 goto e_inval;
3464 }
3465 len = ceph_decode_32(p);
3466 ceph_decode_need(p, end, len, e_inval);
3467 struct_end = *p + len;
3468
3469 oloc->pool = ceph_decode_64(p);
3470 *p += 4; /* skip preferred */
3471
3472 len = ceph_decode_32(p);
3473 if (len > 0) {
3474 pr_warn("ceph_object_locator::key is set\n");
3475 goto e_inval;
3476 }
3477
3478 if (struct_v >= 5) {
3479 bool changed = false;
3480
3481 len = ceph_decode_32(p);
3482 if (len > 0) {
3483 ceph_decode_need(p, end, len, e_inval);
3484 if (!oloc->pool_ns ||
3485 ceph_compare_string(oloc->pool_ns, *p, len))
3486 changed = true;
3487 *p += len;
3488 } else {
3489 if (oloc->pool_ns)
3490 changed = true;
3491 }
3492 if (changed) {
3493 /* redirect changes namespace */
3494 pr_warn("ceph_object_locator::nspace is changed\n");
3495 goto e_inval;
3496 }
3497 }
3498
3499 if (struct_v >= 6) {
3500 s64 hash = ceph_decode_64(p);
3501 if (hash != -1) {
3502 pr_warn("ceph_object_locator::hash is set\n");
3503 goto e_inval;
3504 }
3505 }
3506
3507 /* skip the rest */
3508 *p = struct_end;
3509 out:
3510 return ret;
3511
3512 e_inval:
3513 ret = -EINVAL;
3514 goto out;
3515 }
3516
3517 static int ceph_redirect_decode(void **p, void *end,
3518 struct ceph_request_redirect *redir)
3519 {
3520 u8 struct_v, struct_cv;
3521 u32 len;
3522 void *struct_end;
3523 int ret;
3524
3525 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3526 struct_v = ceph_decode_8(p);
3527 struct_cv = ceph_decode_8(p);
3528 if (struct_cv > 1) {
3529 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3530 struct_v, struct_cv);
3531 goto e_inval;
3532 }
3533 len = ceph_decode_32(p);
3534 ceph_decode_need(p, end, len, e_inval);
3535 struct_end = *p + len;
3536
3537 ret = ceph_oloc_decode(p, end, &redir->oloc);
3538 if (ret)
3539 goto out;
3540
3541 len = ceph_decode_32(p);
3542 if (len > 0) {
3543 pr_warn("ceph_request_redirect::object_name is set\n");
3544 goto e_inval;
3545 }
3546
3547 /* skip the rest */
3548 *p = struct_end;
3549 out:
3550 return ret;
3551
3552 e_inval:
3553 ret = -EINVAL;
3554 goto out;
3555 }
3556
3557 struct MOSDOpReply {
3558 struct ceph_pg pgid;
3559 u64 flags;
3560 int result;
3561 u32 epoch;
3562 int num_ops;
3563 u32 outdata_len[CEPH_OSD_MAX_OPS];
3564 s32 rval[CEPH_OSD_MAX_OPS];
3565 int retry_attempt;
3566 struct ceph_eversion replay_version;
3567 u64 user_version;
3568 struct ceph_request_redirect redirect;
3569 };
3570
3571 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
3572 {
3573 void *p = msg->front.iov_base;
3574 void *const end = p + msg->front.iov_len;
3575 u16 version = le16_to_cpu(msg->hdr.version);
3576 struct ceph_eversion bad_replay_version;
3577 u8 decode_redir;
3578 u32 len;
3579 int ret;
3580 int i;
3581
3582 ceph_decode_32_safe(&p, end, len, e_inval);
3583 ceph_decode_need(&p, end, len, e_inval);
3584 p += len; /* skip oid */
3585
3586 ret = ceph_decode_pgid(&p, end, &m->pgid);
3587 if (ret)
3588 return ret;
3589
3590 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3591 ceph_decode_32_safe(&p, end, m->result, e_inval);
3592 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3593 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3594 p += sizeof(bad_replay_version);
3595 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
3596
3597 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3598 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3599 goto e_inval;
3600
3601 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3602 e_inval);
3603 for (i = 0; i < m->num_ops; i++) {
3604 struct ceph_osd_op *op = p;
3605
3606 m->outdata_len[i] = le32_to_cpu(op->payload_len);
3607 p += sizeof(*op);
3608 }
3609
3610 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3611 for (i = 0; i < m->num_ops; i++)
3612 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
3613
3614 if (version >= 5) {
3615 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3616 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3617 p += sizeof(m->replay_version);
3618 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3619 } else {
3620 m->replay_version = bad_replay_version; /* struct */
3621 m->user_version = le64_to_cpu(m->replay_version.version);
3622 }
3623
3624 if (version >= 6) {
3625 if (version >= 7)
3626 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
3627 else
3628 decode_redir = 1;
3629 } else {
3630 decode_redir = 0;
3631 }
3632
3633 if (decode_redir) {
3634 ret = ceph_redirect_decode(&p, end, &m->redirect);
3635 if (ret)
3636 return ret;
3637 } else {
3638 ceph_oloc_init(&m->redirect.oloc);
3639 }
3640
3641 return 0;
3642
3643 e_inval:
3644 return -EINVAL;
3645 }
3646
3647 /*
3648 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3649 * specified.
3650 */
3651 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3652 {
3653 struct ceph_osd_client *osdc = osd->o_osdc;
3654 struct ceph_osd_request *req;
3655 struct MOSDOpReply m;
3656 u64 tid = le64_to_cpu(msg->hdr.tid);
3657 u32 data_len = 0;
3658 int ret;
3659 int i;
3660
3661 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3662
3663 down_read(&osdc->lock);
3664 if (!osd_registered(osd)) {
3665 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3666 goto out_unlock_osdc;
3667 }
3668 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3669
3670 mutex_lock(&osd->lock);
3671 req = lookup_request(&osd->o_requests, tid);
3672 if (!req) {
3673 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3674 goto out_unlock_session;
3675 }
3676
3677 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3678 ret = decode_MOSDOpReply(msg, &m);
3679 m.redirect.oloc.pool_ns = NULL;
3680 if (ret) {
3681 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3682 req->r_tid, ret);
3683 ceph_msg_dump(msg);
3684 goto fail_request;
3685 }
3686 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3687 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3688 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3689 le64_to_cpu(m.replay_version.version), m.user_version);
3690
3691 if (m.retry_attempt >= 0) {
3692 if (m.retry_attempt != req->r_attempts - 1) {
3693 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3694 req, req->r_tid, m.retry_attempt,
3695 req->r_attempts - 1);
3696 goto out_unlock_session;
3697 }
3698 } else {
3699 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3700 }
3701
3702 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3703 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3704 m.redirect.oloc.pool);
3705 unlink_request(osd, req);
3706 mutex_unlock(&osd->lock);
3707
3708 /*
3709 * Not ceph_oloc_copy() - changing pool_ns is not
3710 * supported.
3711 */
3712 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3713 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED |
3714 CEPH_OSD_FLAG_IGNORE_OVERLAY |
3715 CEPH_OSD_FLAG_IGNORE_CACHE;
3716 req->r_tid = 0;
3717 __submit_request(req, false);
3718 goto out_unlock_osdc;
3719 }
3720
3721 if (m.result == -EAGAIN) {
3722 dout("req %p tid %llu EAGAIN\n", req, req->r_tid);
3723 unlink_request(osd, req);
3724 mutex_unlock(&osd->lock);
3725
3726 /*
3727 * The object is missing on the replica or not (yet)
3728 * readable. Clear pgid to force a resend to the primary
3729 * via legacy_change.
3730 */
3731 req->r_t.pgid.pool = 0;
3732 req->r_t.pgid.seed = 0;
3733 WARN_ON(!req->r_t.used_replica);
3734 req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS |
3735 CEPH_OSD_FLAG_LOCALIZE_READS);
3736 req->r_tid = 0;
3737 __submit_request(req, false);
3738 goto out_unlock_osdc;
3739 }
3740
3741 if (m.num_ops != req->r_num_ops) {
3742 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3743 req->r_num_ops, req->r_tid);
3744 goto fail_request;
3745 }
3746 for (i = 0; i < req->r_num_ops; i++) {
3747 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3748 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3749 req->r_ops[i].rval = m.rval[i];
3750 req->r_ops[i].outdata_len = m.outdata_len[i];
3751 data_len += m.outdata_len[i];
3752 }
3753 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3754 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3755 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3756 goto fail_request;
3757 }
3758 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3759 req, req->r_tid, m.result, data_len);
3760
3761 /*
3762 * Since we only ever request ONDISK, we should only ever get
3763 * one (type of) reply back.
3764 */
3765 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3766 req->r_result = m.result ?: data_len;
3767 finish_request(req);
3768 mutex_unlock(&osd->lock);
3769 up_read(&osdc->lock);
3770
3771 __complete_request(req);
3772 return;
3773
3774 fail_request:
3775 complete_request(req, -EIO);
3776 out_unlock_session:
3777 mutex_unlock(&osd->lock);
3778 out_unlock_osdc:
3779 up_read(&osdc->lock);
3780 }
3781
3782 static void set_pool_was_full(struct ceph_osd_client *osdc)
3783 {
3784 struct rb_node *n;
3785
3786 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3787 struct ceph_pg_pool_info *pi =
3788 rb_entry(n, struct ceph_pg_pool_info, node);
3789
3790 pi->was_full = __pool_full(pi);
3791 }
3792 }
3793
3794 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
3795 {
3796 struct ceph_pg_pool_info *pi;
3797
3798 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3799 if (!pi)
3800 return false;
3801
3802 return pi->was_full && !__pool_full(pi);
3803 }
3804
3805 static enum calc_target_result
3806 recalc_linger_target(struct ceph_osd_linger_request *lreq)
3807 {
3808 struct ceph_osd_client *osdc = lreq->osdc;
3809 enum calc_target_result ct_res;
3810
3811 ct_res = calc_target(osdc, &lreq->t, true);
3812 if (ct_res == CALC_TARGET_NEED_RESEND) {
3813 struct ceph_osd *osd;
3814
3815 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3816 if (osd != lreq->osd) {
3817 unlink_linger(lreq->osd, lreq);
3818 link_linger(osd, lreq);
3819 }
3820 }
3821
3822 return ct_res;
3823 }
3824
3825 /*
3826 * Requeue requests whose mapping to an OSD has changed.
3827 */
3828 static void scan_requests(struct ceph_osd *osd,
3829 bool force_resend,
3830 bool cleared_full,
3831 bool check_pool_cleared_full,
3832 struct rb_root *need_resend,
3833 struct list_head *need_resend_linger)
3834 {
3835 struct ceph_osd_client *osdc = osd->o_osdc;
3836 struct rb_node *n;
3837 bool force_resend_writes;
3838
3839 for (n = rb_first(&osd->o_linger_requests); n; ) {
3840 struct ceph_osd_linger_request *lreq =
3841 rb_entry(n, struct ceph_osd_linger_request, node);
3842 enum calc_target_result ct_res;
3843
3844 n = rb_next(n); /* recalc_linger_target() */
3845
3846 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3847 lreq->linger_id);
3848 ct_res = recalc_linger_target(lreq);
3849 switch (ct_res) {
3850 case CALC_TARGET_NO_ACTION:
3851 force_resend_writes = cleared_full ||
3852 (check_pool_cleared_full &&
3853 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3854 if (!force_resend && !force_resend_writes)
3855 break;
3856
3857 fallthrough;
3858 case CALC_TARGET_NEED_RESEND:
3859 cancel_linger_map_check(lreq);
3860 /*
3861 * scan_requests() for the previous epoch(s)
3862 * may have already added it to the list, since
3863 * it's not unlinked here.
3864 */
3865 if (list_empty(&lreq->scan_item))
3866 list_add_tail(&lreq->scan_item, need_resend_linger);
3867 break;
3868 case CALC_TARGET_POOL_DNE:
3869 list_del_init(&lreq->scan_item);
3870 check_linger_pool_dne(lreq);
3871 break;
3872 }
3873 }
3874
3875 for (n = rb_first(&osd->o_requests); n; ) {
3876 struct ceph_osd_request *req =
3877 rb_entry(n, struct ceph_osd_request, r_node);
3878 enum calc_target_result ct_res;
3879
3880 n = rb_next(n); /* unlink_request(), check_pool_dne() */
3881
3882 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3883 ct_res = calc_target(osdc, &req->r_t, false);
3884 switch (ct_res) {
3885 case CALC_TARGET_NO_ACTION:
3886 force_resend_writes = cleared_full ||
3887 (check_pool_cleared_full &&
3888 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3889 if (!force_resend &&
3890 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3891 !force_resend_writes))
3892 break;
3893
3894 fallthrough;
3895 case CALC_TARGET_NEED_RESEND:
3896 cancel_map_check(req);
3897 unlink_request(osd, req);
3898 insert_request(need_resend, req);
3899 break;
3900 case CALC_TARGET_POOL_DNE:
3901 check_pool_dne(req);
3902 break;
3903 }
3904 }
3905 }
3906
3907 static int handle_one_map(struct ceph_osd_client *osdc,
3908 void *p, void *end, bool incremental,
3909 struct rb_root *need_resend,
3910 struct list_head *need_resend_linger)
3911 {
3912 struct ceph_osdmap *newmap;
3913 struct rb_node *n;
3914 bool skipped_map = false;
3915 bool was_full;
3916
3917 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3918 set_pool_was_full(osdc);
3919
3920 if (incremental)
3921 newmap = osdmap_apply_incremental(&p, end,
3922 ceph_msgr2(osdc->client),
3923 osdc->osdmap);
3924 else
3925 newmap = ceph_osdmap_decode(&p, end, ceph_msgr2(osdc->client));
3926 if (IS_ERR(newmap))
3927 return PTR_ERR(newmap);
3928
3929 if (newmap != osdc->osdmap) {
3930 /*
3931 * Preserve ->was_full before destroying the old map.
3932 * For pools that weren't in the old map, ->was_full
3933 * should be false.
3934 */
3935 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3936 struct ceph_pg_pool_info *pi =
3937 rb_entry(n, struct ceph_pg_pool_info, node);
3938 struct ceph_pg_pool_info *old_pi;
3939
3940 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3941 if (old_pi)
3942 pi->was_full = old_pi->was_full;
3943 else
3944 WARN_ON(pi->was_full);
3945 }
3946
3947 if (osdc->osdmap->epoch &&
3948 osdc->osdmap->epoch + 1 < newmap->epoch) {
3949 WARN_ON(incremental);
3950 skipped_map = true;
3951 }
3952
3953 ceph_osdmap_destroy(osdc->osdmap);
3954 osdc->osdmap = newmap;
3955 }
3956
3957 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3958 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3959 need_resend, need_resend_linger);
3960
3961 for (n = rb_first(&osdc->osds); n; ) {
3962 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3963
3964 n = rb_next(n); /* close_osd() */
3965
3966 scan_requests(osd, skipped_map, was_full, true, need_resend,
3967 need_resend_linger);
3968 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3969 memcmp(&osd->o_con.peer_addr,
3970 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3971 sizeof(struct ceph_entity_addr)))
3972 close_osd(osd);
3973 }
3974
3975 return 0;
3976 }
3977
3978 static void kick_requests(struct ceph_osd_client *osdc,
3979 struct rb_root *need_resend,
3980 struct list_head *need_resend_linger)
3981 {
3982 struct ceph_osd_linger_request *lreq, *nlreq;
3983 enum calc_target_result ct_res;
3984 struct rb_node *n;
3985
3986 /* make sure need_resend targets reflect latest map */
3987 for (n = rb_first(need_resend); n; ) {
3988 struct ceph_osd_request *req =
3989 rb_entry(n, struct ceph_osd_request, r_node);
3990
3991 n = rb_next(n);
3992
3993 if (req->r_t.epoch < osdc->osdmap->epoch) {
3994 ct_res = calc_target(osdc, &req->r_t, false);
3995 if (ct_res == CALC_TARGET_POOL_DNE) {
3996 erase_request(need_resend, req);
3997 check_pool_dne(req);
3998 }
3999 }
4000 }
4001
4002 for (n = rb_first(need_resend); n; ) {
4003 struct ceph_osd_request *req =
4004 rb_entry(n, struct ceph_osd_request, r_node);
4005 struct ceph_osd *osd;
4006
4007 n = rb_next(n);
4008 erase_request(need_resend, req); /* before link_request() */
4009
4010 osd = lookup_create_osd(osdc, req->r_t.osd, true);
4011 link_request(osd, req);
4012 if (!req->r_linger) {
4013 if (!osd_homeless(osd) && !req->r_t.paused)
4014 send_request(req);
4015 } else {
4016 cancel_linger_request(req);
4017 }
4018 }
4019
4020 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
4021 if (!osd_homeless(lreq->osd))
4022 send_linger(lreq);
4023
4024 list_del_init(&lreq->scan_item);
4025 }
4026 }
4027
4028 /*
4029 * Process updated osd map.
4030 *
4031 * The message contains any number of incremental and full maps, normally
4032 * indicating some sort of topology change in the cluster. Kick requests
4033 * off to different OSDs as needed.
4034 */
4035 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
4036 {
4037 void *p = msg->front.iov_base;
4038 void *const end = p + msg->front.iov_len;
4039 u32 nr_maps, maplen;
4040 u32 epoch;
4041 struct ceph_fsid fsid;
4042 struct rb_root need_resend = RB_ROOT;
4043 LIST_HEAD(need_resend_linger);
4044 bool handled_incremental = false;
4045 bool was_pauserd, was_pausewr;
4046 bool pauserd, pausewr;
4047 int err;
4048
4049 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
4050 down_write(&osdc->lock);
4051
4052 /* verify fsid */
4053 ceph_decode_need(&p, end, sizeof(fsid), bad);
4054 ceph_decode_copy(&p, &fsid, sizeof(fsid));
4055 if (ceph_check_fsid(osdc->client, &fsid) < 0)
4056 goto bad;
4057
4058 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4059 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4060 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4061 have_pool_full(osdc);
4062
4063 /* incremental maps */
4064 ceph_decode_32_safe(&p, end, nr_maps, bad);
4065 dout(" %d inc maps\n", nr_maps);
4066 while (nr_maps > 0) {
4067 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4068 epoch = ceph_decode_32(&p);
4069 maplen = ceph_decode_32(&p);
4070 ceph_decode_need(&p, end, maplen, bad);
4071 if (osdc->osdmap->epoch &&
4072 osdc->osdmap->epoch + 1 == epoch) {
4073 dout("applying incremental map %u len %d\n",
4074 epoch, maplen);
4075 err = handle_one_map(osdc, p, p + maplen, true,
4076 &need_resend, &need_resend_linger);
4077 if (err)
4078 goto bad;
4079 handled_incremental = true;
4080 } else {
4081 dout("ignoring incremental map %u len %d\n",
4082 epoch, maplen);
4083 }
4084 p += maplen;
4085 nr_maps--;
4086 }
4087 if (handled_incremental)
4088 goto done;
4089
4090 /* full maps */
4091 ceph_decode_32_safe(&p, end, nr_maps, bad);
4092 dout(" %d full maps\n", nr_maps);
4093 while (nr_maps) {
4094 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4095 epoch = ceph_decode_32(&p);
4096 maplen = ceph_decode_32(&p);
4097 ceph_decode_need(&p, end, maplen, bad);
4098 if (nr_maps > 1) {
4099 dout("skipping non-latest full map %u len %d\n",
4100 epoch, maplen);
4101 } else if (osdc->osdmap->epoch >= epoch) {
4102 dout("skipping full map %u len %d, "
4103 "older than our %u\n", epoch, maplen,
4104 osdc->osdmap->epoch);
4105 } else {
4106 dout("taking full map %u len %d\n", epoch, maplen);
4107 err = handle_one_map(osdc, p, p + maplen, false,
4108 &need_resend, &need_resend_linger);
4109 if (err)
4110 goto bad;
4111 }
4112 p += maplen;
4113 nr_maps--;
4114 }
4115
4116 done:
4117 /*
4118 * subscribe to subsequent osdmap updates if full to ensure
4119 * we find out when we are no longer full and stop returning
4120 * ENOSPC.
4121 */
4122 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4123 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4124 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4125 have_pool_full(osdc);
4126 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4127 osdc->osdmap->epoch < osdc->epoch_barrier)
4128 maybe_request_map(osdc);
4129
4130 kick_requests(osdc, &need_resend, &need_resend_linger);
4131
4132 ceph_osdc_abort_on_full(osdc);
4133 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4134 osdc->osdmap->epoch);
4135 up_write(&osdc->lock);
4136 wake_up_all(&osdc->client->auth_wq);
4137 return;
4138
4139 bad:
4140 pr_err("osdc handle_map corrupt msg\n");
4141 ceph_msg_dump(msg);
4142 up_write(&osdc->lock);
4143 }
4144
4145 /*
4146 * Resubmit requests pending on the given osd.
4147 */
4148 static void kick_osd_requests(struct ceph_osd *osd)
4149 {
4150 struct rb_node *n;
4151
4152 clear_backoffs(osd);
4153
4154 for (n = rb_first(&osd->o_requests); n; ) {
4155 struct ceph_osd_request *req =
4156 rb_entry(n, struct ceph_osd_request, r_node);
4157
4158 n = rb_next(n); /* cancel_linger_request() */
4159
4160 if (!req->r_linger) {
4161 if (!req->r_t.paused)
4162 send_request(req);
4163 } else {
4164 cancel_linger_request(req);
4165 }
4166 }
4167 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4168 struct ceph_osd_linger_request *lreq =
4169 rb_entry(n, struct ceph_osd_linger_request, node);
4170
4171 send_linger(lreq);
4172 }
4173 }
4174
4175 /*
4176 * If the osd connection drops, we need to resubmit all requests.
4177 */
4178 static void osd_fault(struct ceph_connection *con)
4179 {
4180 struct ceph_osd *osd = con->private;
4181 struct ceph_osd_client *osdc = osd->o_osdc;
4182
4183 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4184
4185 down_write(&osdc->lock);
4186 if (!osd_registered(osd)) {
4187 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4188 goto out_unlock;
4189 }
4190
4191 if (!reopen_osd(osd))
4192 kick_osd_requests(osd);
4193 maybe_request_map(osdc);
4194
4195 out_unlock:
4196 up_write(&osdc->lock);
4197 }
4198
4199 struct MOSDBackoff {
4200 struct ceph_spg spgid;
4201 u32 map_epoch;
4202 u8 op;
4203 u64 id;
4204 struct ceph_hobject_id *begin;
4205 struct ceph_hobject_id *end;
4206 };
4207
4208 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4209 {
4210 void *p = msg->front.iov_base;
4211 void *const end = p + msg->front.iov_len;
4212 u8 struct_v;
4213 u32 struct_len;
4214 int ret;
4215
4216 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4217 if (ret)
4218 return ret;
4219
4220 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4221 if (ret)
4222 return ret;
4223
4224 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4225 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4226 ceph_decode_8_safe(&p, end, m->op, e_inval);
4227 ceph_decode_64_safe(&p, end, m->id, e_inval);
4228
4229 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4230 if (!m->begin)
4231 return -ENOMEM;
4232
4233 ret = decode_hoid(&p, end, m->begin);
4234 if (ret) {
4235 free_hoid(m->begin);
4236 return ret;
4237 }
4238
4239 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4240 if (!m->end) {
4241 free_hoid(m->begin);
4242 return -ENOMEM;
4243 }
4244
4245 ret = decode_hoid(&p, end, m->end);
4246 if (ret) {
4247 free_hoid(m->begin);
4248 free_hoid(m->end);
4249 return ret;
4250 }
4251
4252 return 0;
4253
4254 e_inval:
4255 return -EINVAL;
4256 }
4257
4258 static struct ceph_msg *create_backoff_message(
4259 const struct ceph_osd_backoff *backoff,
4260 u32 map_epoch)
4261 {
4262 struct ceph_msg *msg;
4263 void *p, *end;
4264 int msg_size;
4265
4266 msg_size = CEPH_ENCODING_START_BLK_LEN +
4267 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4268 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4269 msg_size += CEPH_ENCODING_START_BLK_LEN +
4270 hoid_encoding_size(backoff->begin);
4271 msg_size += CEPH_ENCODING_START_BLK_LEN +
4272 hoid_encoding_size(backoff->end);
4273
4274 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4275 if (!msg)
4276 return NULL;
4277
4278 p = msg->front.iov_base;
4279 end = p + msg->front_alloc_len;
4280
4281 encode_spgid(&p, &backoff->spgid);
4282 ceph_encode_32(&p, map_epoch);
4283 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4284 ceph_encode_64(&p, backoff->id);
4285 encode_hoid(&p, end, backoff->begin);
4286 encode_hoid(&p, end, backoff->end);
4287 BUG_ON(p != end);
4288
4289 msg->front.iov_len = p - msg->front.iov_base;
4290 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4291 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4292
4293 return msg;
4294 }
4295
4296 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4297 {
4298 struct ceph_spg_mapping *spg;
4299 struct ceph_osd_backoff *backoff;
4300 struct ceph_msg *msg;
4301
4302 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4303 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4304
4305 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4306 if (!spg) {
4307 spg = alloc_spg_mapping();
4308 if (!spg) {
4309 pr_err("%s failed to allocate spg\n", __func__);
4310 return;
4311 }
4312 spg->spgid = m->spgid; /* struct */
4313 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4314 }
4315
4316 backoff = alloc_backoff();
4317 if (!backoff) {
4318 pr_err("%s failed to allocate backoff\n", __func__);
4319 return;
4320 }
4321 backoff->spgid = m->spgid; /* struct */
4322 backoff->id = m->id;
4323 backoff->begin = m->begin;
4324 m->begin = NULL; /* backoff now owns this */
4325 backoff->end = m->end;
4326 m->end = NULL; /* ditto */
4327
4328 insert_backoff(&spg->backoffs, backoff);
4329 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4330
4331 /*
4332 * Ack with original backoff's epoch so that the OSD can
4333 * discard this if there was a PG split.
4334 */
4335 msg = create_backoff_message(backoff, m->map_epoch);
4336 if (!msg) {
4337 pr_err("%s failed to allocate msg\n", __func__);
4338 return;
4339 }
4340 ceph_con_send(&osd->o_con, msg);
4341 }
4342
4343 static bool target_contained_by(const struct ceph_osd_request_target *t,
4344 const struct ceph_hobject_id *begin,
4345 const struct ceph_hobject_id *end)
4346 {
4347 struct ceph_hobject_id hoid;
4348 int cmp;
4349
4350 hoid_fill_from_target(&hoid, t);
4351 cmp = hoid_compare(&hoid, begin);
4352 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4353 }
4354
4355 static void handle_backoff_unblock(struct ceph_osd *osd,
4356 const struct MOSDBackoff *m)
4357 {
4358 struct ceph_spg_mapping *spg;
4359 struct ceph_osd_backoff *backoff;
4360 struct rb_node *n;
4361
4362 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4363 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4364
4365 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4366 if (!backoff) {
4367 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4368 __func__, osd->o_osd, m->spgid.pgid.pool,
4369 m->spgid.pgid.seed, m->spgid.shard, m->id);
4370 return;
4371 }
4372
4373 if (hoid_compare(backoff->begin, m->begin) &&
4374 hoid_compare(backoff->end, m->end)) {
4375 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4376 __func__, osd->o_osd, m->spgid.pgid.pool,
4377 m->spgid.pgid.seed, m->spgid.shard, m->id);
4378 /* unblock it anyway... */
4379 }
4380
4381 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4382 BUG_ON(!spg);
4383
4384 erase_backoff(&spg->backoffs, backoff);
4385 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4386 free_backoff(backoff);
4387
4388 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4389 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4390 free_spg_mapping(spg);
4391 }
4392
4393 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4394 struct ceph_osd_request *req =
4395 rb_entry(n, struct ceph_osd_request, r_node);
4396
4397 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4398 /*
4399 * Match against @m, not @backoff -- the PG may
4400 * have split on the OSD.
4401 */
4402 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4403 /*
4404 * If no other installed backoff applies,
4405 * resend.
4406 */
4407 send_request(req);
4408 }
4409 }
4410 }
4411 }
4412
4413 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4414 {
4415 struct ceph_osd_client *osdc = osd->o_osdc;
4416 struct MOSDBackoff m;
4417 int ret;
4418
4419 down_read(&osdc->lock);
4420 if (!osd_registered(osd)) {
4421 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4422 up_read(&osdc->lock);
4423 return;
4424 }
4425 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4426
4427 mutex_lock(&osd->lock);
4428 ret = decode_MOSDBackoff(msg, &m);
4429 if (ret) {
4430 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4431 ceph_msg_dump(msg);
4432 goto out_unlock;
4433 }
4434
4435 switch (m.op) {
4436 case CEPH_OSD_BACKOFF_OP_BLOCK:
4437 handle_backoff_block(osd, &m);
4438 break;
4439 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4440 handle_backoff_unblock(osd, &m);
4441 break;
4442 default:
4443 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4444 }
4445
4446 free_hoid(m.begin);
4447 free_hoid(m.end);
4448
4449 out_unlock:
4450 mutex_unlock(&osd->lock);
4451 up_read(&osdc->lock);
4452 }
4453
4454 /*
4455 * Process osd watch notifications
4456 */
4457 static void handle_watch_notify(struct ceph_osd_client *osdc,
4458 struct ceph_msg *msg)
4459 {
4460 void *p = msg->front.iov_base;
4461 void *const end = p + msg->front.iov_len;
4462 struct ceph_osd_linger_request *lreq;
4463 struct linger_work *lwork;
4464 u8 proto_ver, opcode;
4465 u64 cookie, notify_id;
4466 u64 notifier_id = 0;
4467 s32 return_code = 0;
4468 void *payload = NULL;
4469 u32 payload_len = 0;
4470
4471 ceph_decode_8_safe(&p, end, proto_ver, bad);
4472 ceph_decode_8_safe(&p, end, opcode, bad);
4473 ceph_decode_64_safe(&p, end, cookie, bad);
4474 p += 8; /* skip ver */
4475 ceph_decode_64_safe(&p, end, notify_id, bad);
4476
4477 if (proto_ver >= 1) {
4478 ceph_decode_32_safe(&p, end, payload_len, bad);
4479 ceph_decode_need(&p, end, payload_len, bad);
4480 payload = p;
4481 p += payload_len;
4482 }
4483
4484 if (le16_to_cpu(msg->hdr.version) >= 2)
4485 ceph_decode_32_safe(&p, end, return_code, bad);
4486
4487 if (le16_to_cpu(msg->hdr.version) >= 3)
4488 ceph_decode_64_safe(&p, end, notifier_id, bad);
4489
4490 down_read(&osdc->lock);
4491 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4492 if (!lreq) {
4493 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4494 cookie);
4495 goto out_unlock_osdc;
4496 }
4497
4498 mutex_lock(&lreq->lock);
4499 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4500 opcode, cookie, lreq, lreq->is_watch);
4501 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4502 if (!lreq->last_error) {
4503 lreq->last_error = -ENOTCONN;
4504 queue_watch_error(lreq);
4505 }
4506 } else if (!lreq->is_watch) {
4507 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4508 if (lreq->notify_id && lreq->notify_id != notify_id) {
4509 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4510 lreq->notify_id, notify_id);
4511 } else if (!completion_done(&lreq->notify_finish_wait)) {
4512 struct ceph_msg_data *data =
4513 msg->num_data_items ? &msg->data[0] : NULL;
4514
4515 if (data) {
4516 if (lreq->preply_pages) {
4517 WARN_ON(data->type !=
4518 CEPH_MSG_DATA_PAGES);
4519 *lreq->preply_pages = data->pages;
4520 *lreq->preply_len = data->length;
4521 data->own_pages = false;
4522 }
4523 }
4524 lreq->notify_finish_error = return_code;
4525 complete_all(&lreq->notify_finish_wait);
4526 }
4527 } else {
4528 /* CEPH_WATCH_EVENT_NOTIFY */
4529 lwork = lwork_alloc(lreq, do_watch_notify);
4530 if (!lwork) {
4531 pr_err("failed to allocate notify-lwork\n");
4532 goto out_unlock_lreq;
4533 }
4534
4535 lwork->notify.notify_id = notify_id;
4536 lwork->notify.notifier_id = notifier_id;
4537 lwork->notify.payload = payload;
4538 lwork->notify.payload_len = payload_len;
4539 lwork->notify.msg = ceph_msg_get(msg);
4540 lwork_queue(lwork);
4541 }
4542
4543 out_unlock_lreq:
4544 mutex_unlock(&lreq->lock);
4545 out_unlock_osdc:
4546 up_read(&osdc->lock);
4547 return;
4548
4549 bad:
4550 pr_err("osdc handle_watch_notify corrupt msg\n");
4551 }
4552
4553 /*
4554 * Register request, send initial attempt.
4555 */
4556 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4557 struct ceph_osd_request *req,
4558 bool nofail)
4559 {
4560 down_read(&osdc->lock);
4561 submit_request(req, false);
4562 up_read(&osdc->lock);
4563
4564 return 0;
4565 }
4566 EXPORT_SYMBOL(ceph_osdc_start_request);
4567
4568 /*
4569 * Unregister a registered request. The request is not completed:
4570 * ->r_result isn't set and __complete_request() isn't called.
4571 */
4572 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4573 {
4574 struct ceph_osd_client *osdc = req->r_osdc;
4575
4576 down_write(&osdc->lock);
4577 if (req->r_osd)
4578 cancel_request(req);
4579 up_write(&osdc->lock);
4580 }
4581 EXPORT_SYMBOL(ceph_osdc_cancel_request);
4582
4583 /*
4584 * @timeout: in jiffies, 0 means "wait forever"
4585 */
4586 static int wait_request_timeout(struct ceph_osd_request *req,
4587 unsigned long timeout)
4588 {
4589 long left;
4590
4591 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4592 left = wait_for_completion_killable_timeout(&req->r_completion,
4593 ceph_timeout_jiffies(timeout));
4594 if (left <= 0) {
4595 left = left ?: -ETIMEDOUT;
4596 ceph_osdc_cancel_request(req);
4597 } else {
4598 left = req->r_result; /* completed */
4599 }
4600
4601 return left;
4602 }
4603
4604 /*
4605 * wait for a request to complete
4606 */
4607 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4608 struct ceph_osd_request *req)
4609 {
4610 return wait_request_timeout(req, 0);
4611 }
4612 EXPORT_SYMBOL(ceph_osdc_wait_request);
4613
4614 /*
4615 * sync - wait for all in-flight requests to flush. avoid starvation.
4616 */
4617 void ceph_osdc_sync(struct ceph_osd_client *osdc)
4618 {
4619 struct rb_node *n, *p;
4620 u64 last_tid = atomic64_read(&osdc->last_tid);
4621
4622 again:
4623 down_read(&osdc->lock);
4624 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4625 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4626
4627 mutex_lock(&osd->lock);
4628 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4629 struct ceph_osd_request *req =
4630 rb_entry(p, struct ceph_osd_request, r_node);
4631
4632 if (req->r_tid > last_tid)
4633 break;
4634
4635 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4636 continue;
4637
4638 ceph_osdc_get_request(req);
4639 mutex_unlock(&osd->lock);
4640 up_read(&osdc->lock);
4641 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4642 __func__, req, req->r_tid, last_tid);
4643 wait_for_completion(&req->r_completion);
4644 ceph_osdc_put_request(req);
4645 goto again;
4646 }
4647
4648 mutex_unlock(&osd->lock);
4649 }
4650
4651 up_read(&osdc->lock);
4652 dout("%s done last_tid %llu\n", __func__, last_tid);
4653 }
4654 EXPORT_SYMBOL(ceph_osdc_sync);
4655
4656 static struct ceph_osd_request *
4657 alloc_linger_request(struct ceph_osd_linger_request *lreq)
4658 {
4659 struct ceph_osd_request *req;
4660
4661 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4662 if (!req)
4663 return NULL;
4664
4665 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4666 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4667 return req;
4668 }
4669
4670 static struct ceph_osd_request *
4671 alloc_watch_request(struct ceph_osd_linger_request *lreq, u8 watch_opcode)
4672 {
4673 struct ceph_osd_request *req;
4674
4675 req = alloc_linger_request(lreq);
4676 if (!req)
4677 return NULL;
4678
4679 /*
4680 * Pass 0 for cookie because we don't know it yet, it will be
4681 * filled in by linger_submit().
4682 */
4683 osd_req_op_watch_init(req, 0, 0, watch_opcode);
4684
4685 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4686 ceph_osdc_put_request(req);
4687 return NULL;
4688 }
4689
4690 return req;
4691 }
4692
4693 /*
4694 * Returns a handle, caller owns a ref.
4695 */
4696 struct ceph_osd_linger_request *
4697 ceph_osdc_watch(struct ceph_osd_client *osdc,
4698 struct ceph_object_id *oid,
4699 struct ceph_object_locator *oloc,
4700 rados_watchcb2_t wcb,
4701 rados_watcherrcb_t errcb,
4702 void *data)
4703 {
4704 struct ceph_osd_linger_request *lreq;
4705 int ret;
4706
4707 lreq = linger_alloc(osdc);
4708 if (!lreq)
4709 return ERR_PTR(-ENOMEM);
4710
4711 lreq->is_watch = true;
4712 lreq->wcb = wcb;
4713 lreq->errcb = errcb;
4714 lreq->data = data;
4715 lreq->watch_valid_thru = jiffies;
4716
4717 ceph_oid_copy(&lreq->t.base_oid, oid);
4718 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4719 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4720 ktime_get_real_ts64(&lreq->mtime);
4721
4722 lreq->reg_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_WATCH);
4723 if (!lreq->reg_req) {
4724 ret = -ENOMEM;
4725 goto err_put_lreq;
4726 }
4727
4728 lreq->ping_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_PING);
4729 if (!lreq->ping_req) {
4730 ret = -ENOMEM;
4731 goto err_put_lreq;
4732 }
4733
4734 linger_submit(lreq);
4735 ret = linger_reg_commit_wait(lreq);
4736 if (ret) {
4737 linger_cancel(lreq);
4738 goto err_put_lreq;
4739 }
4740
4741 return lreq;
4742
4743 err_put_lreq:
4744 linger_put(lreq);
4745 return ERR_PTR(ret);
4746 }
4747 EXPORT_SYMBOL(ceph_osdc_watch);
4748
4749 /*
4750 * Releases a ref.
4751 *
4752 * Times out after mount_timeout to preserve rbd unmap behaviour
4753 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4754 * with mount_timeout").
4755 */
4756 int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4757 struct ceph_osd_linger_request *lreq)
4758 {
4759 struct ceph_options *opts = osdc->client->options;
4760 struct ceph_osd_request *req;
4761 int ret;
4762
4763 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4764 if (!req)
4765 return -ENOMEM;
4766
4767 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4768 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4769 req->r_flags = CEPH_OSD_FLAG_WRITE;
4770 ktime_get_real_ts64(&req->r_mtime);
4771 osd_req_op_watch_init(req, 0, lreq->linger_id,
4772 CEPH_OSD_WATCH_OP_UNWATCH);
4773
4774 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4775 if (ret)
4776 goto out_put_req;
4777
4778 ceph_osdc_start_request(osdc, req, false);
4779 linger_cancel(lreq);
4780 linger_put(lreq);
4781 ret = wait_request_timeout(req, opts->mount_timeout);
4782
4783 out_put_req:
4784 ceph_osdc_put_request(req);
4785 return ret;
4786 }
4787 EXPORT_SYMBOL(ceph_osdc_unwatch);
4788
4789 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4790 u64 notify_id, u64 cookie, void *payload,
4791 u32 payload_len)
4792 {
4793 struct ceph_osd_req_op *op;
4794 struct ceph_pagelist *pl;
4795 int ret;
4796
4797 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4798
4799 pl = ceph_pagelist_alloc(GFP_NOIO);
4800 if (!pl)
4801 return -ENOMEM;
4802
4803 ret = ceph_pagelist_encode_64(pl, notify_id);
4804 ret |= ceph_pagelist_encode_64(pl, cookie);
4805 if (payload) {
4806 ret |= ceph_pagelist_encode_32(pl, payload_len);
4807 ret |= ceph_pagelist_append(pl, payload, payload_len);
4808 } else {
4809 ret |= ceph_pagelist_encode_32(pl, 0);
4810 }
4811 if (ret) {
4812 ceph_pagelist_release(pl);
4813 return -ENOMEM;
4814 }
4815
4816 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4817 op->indata_len = pl->length;
4818 return 0;
4819 }
4820
4821 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4822 struct ceph_object_id *oid,
4823 struct ceph_object_locator *oloc,
4824 u64 notify_id,
4825 u64 cookie,
4826 void *payload,
4827 u32 payload_len)
4828 {
4829 struct ceph_osd_request *req;
4830 int ret;
4831
4832 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4833 if (!req)
4834 return -ENOMEM;
4835
4836 ceph_oid_copy(&req->r_base_oid, oid);
4837 ceph_oloc_copy(&req->r_base_oloc, oloc);
4838 req->r_flags = CEPH_OSD_FLAG_READ;
4839
4840 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4841 payload_len);
4842 if (ret)
4843 goto out_put_req;
4844
4845 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4846 if (ret)
4847 goto out_put_req;
4848
4849 ceph_osdc_start_request(osdc, req, false);
4850 ret = ceph_osdc_wait_request(osdc, req);
4851
4852 out_put_req:
4853 ceph_osdc_put_request(req);
4854 return ret;
4855 }
4856 EXPORT_SYMBOL(ceph_osdc_notify_ack);
4857
4858 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4859 u64 cookie, u32 prot_ver, u32 timeout,
4860 void *payload, u32 payload_len)
4861 {
4862 struct ceph_osd_req_op *op;
4863 struct ceph_pagelist *pl;
4864 int ret;
4865
4866 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4867 op->notify.cookie = cookie;
4868
4869 pl = ceph_pagelist_alloc(GFP_NOIO);
4870 if (!pl)
4871 return -ENOMEM;
4872
4873 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4874 ret |= ceph_pagelist_encode_32(pl, timeout);
4875 ret |= ceph_pagelist_encode_32(pl, payload_len);
4876 ret |= ceph_pagelist_append(pl, payload, payload_len);
4877 if (ret) {
4878 ceph_pagelist_release(pl);
4879 return -ENOMEM;
4880 }
4881
4882 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4883 op->indata_len = pl->length;
4884 return 0;
4885 }
4886
4887 /*
4888 * @timeout: in seconds
4889 *
4890 * @preply_{pages,len} are initialized both on success and error.
4891 * The caller is responsible for:
4892 *
4893 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4894 */
4895 int ceph_osdc_notify(struct ceph_osd_client *osdc,
4896 struct ceph_object_id *oid,
4897 struct ceph_object_locator *oloc,
4898 void *payload,
4899 u32 payload_len,
4900 u32 timeout,
4901 struct page ***preply_pages,
4902 size_t *preply_len)
4903 {
4904 struct ceph_osd_linger_request *lreq;
4905 struct page **pages;
4906 int ret;
4907
4908 WARN_ON(!timeout);
4909 if (preply_pages) {
4910 *preply_pages = NULL;
4911 *preply_len = 0;
4912 }
4913
4914 lreq = linger_alloc(osdc);
4915 if (!lreq)
4916 return -ENOMEM;
4917
4918 lreq->preply_pages = preply_pages;
4919 lreq->preply_len = preply_len;
4920
4921 ceph_oid_copy(&lreq->t.base_oid, oid);
4922 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4923 lreq->t.flags = CEPH_OSD_FLAG_READ;
4924
4925 lreq->reg_req = alloc_linger_request(lreq);
4926 if (!lreq->reg_req) {
4927 ret = -ENOMEM;
4928 goto out_put_lreq;
4929 }
4930
4931 /*
4932 * Pass 0 for cookie because we don't know it yet, it will be
4933 * filled in by linger_submit().
4934 */
4935 ret = osd_req_op_notify_init(lreq->reg_req, 0, 0, 1, timeout,
4936 payload, payload_len);
4937 if (ret)
4938 goto out_put_lreq;
4939
4940 /* for notify_id */
4941 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4942 if (IS_ERR(pages)) {
4943 ret = PTR_ERR(pages);
4944 goto out_put_lreq;
4945 }
4946 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4947 response_data),
4948 pages, PAGE_SIZE, 0, false, true);
4949
4950 ret = ceph_osdc_alloc_messages(lreq->reg_req, GFP_NOIO);
4951 if (ret)
4952 goto out_put_lreq;
4953
4954 linger_submit(lreq);
4955 ret = linger_reg_commit_wait(lreq);
4956 if (!ret)
4957 ret = linger_notify_finish_wait(lreq);
4958 else
4959 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4960
4961 linger_cancel(lreq);
4962 out_put_lreq:
4963 linger_put(lreq);
4964 return ret;
4965 }
4966 EXPORT_SYMBOL(ceph_osdc_notify);
4967
4968 /*
4969 * Return the number of milliseconds since the watch was last
4970 * confirmed, or an error. If there is an error, the watch is no
4971 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4972 */
4973 int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4974 struct ceph_osd_linger_request *lreq)
4975 {
4976 unsigned long stamp, age;
4977 int ret;
4978
4979 down_read(&osdc->lock);
4980 mutex_lock(&lreq->lock);
4981 stamp = lreq->watch_valid_thru;
4982 if (!list_empty(&lreq->pending_lworks)) {
4983 struct linger_work *lwork =
4984 list_first_entry(&lreq->pending_lworks,
4985 struct linger_work,
4986 pending_item);
4987
4988 if (time_before(lwork->queued_stamp, stamp))
4989 stamp = lwork->queued_stamp;
4990 }
4991 age = jiffies - stamp;
4992 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4993 lreq, lreq->linger_id, age, lreq->last_error);
4994 /* we are truncating to msecs, so return a safe upper bound */
4995 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4996
4997 mutex_unlock(&lreq->lock);
4998 up_read(&osdc->lock);
4999 return ret;
5000 }
5001
5002 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
5003 {
5004 u8 struct_v;
5005 u32 struct_len;
5006 int ret;
5007
5008 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
5009 &struct_v, &struct_len);
5010 if (ret)
5011 goto bad;
5012
5013 ret = -EINVAL;
5014 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
5015 ceph_decode_64_safe(p, end, item->cookie, bad);
5016 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
5017
5018 if (struct_v >= 2) {
5019 ret = ceph_decode_entity_addr(p, end, &item->addr);
5020 if (ret)
5021 goto bad;
5022 } else {
5023 ret = 0;
5024 }
5025
5026 dout("%s %s%llu cookie %llu addr %s\n", __func__,
5027 ENTITY_NAME(item->name), item->cookie,
5028 ceph_pr_addr(&item->addr));
5029 bad:
5030 return ret;
5031 }
5032
5033 static int decode_watchers(void **p, void *end,
5034 struct ceph_watch_item **watchers,
5035 u32 *num_watchers)
5036 {
5037 u8 struct_v;
5038 u32 struct_len;
5039 int i;
5040 int ret;
5041
5042 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
5043 &struct_v, &struct_len);
5044 if (ret)
5045 return ret;
5046
5047 *num_watchers = ceph_decode_32(p);
5048 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
5049 if (!*watchers)
5050 return -ENOMEM;
5051
5052 for (i = 0; i < *num_watchers; i++) {
5053 ret = decode_watcher(p, end, *watchers + i);
5054 if (ret) {
5055 kfree(*watchers);
5056 return ret;
5057 }
5058 }
5059
5060 return 0;
5061 }
5062
5063 /*
5064 * On success, the caller is responsible for:
5065 *
5066 * kfree(watchers);
5067 */
5068 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
5069 struct ceph_object_id *oid,
5070 struct ceph_object_locator *oloc,
5071 struct ceph_watch_item **watchers,
5072 u32 *num_watchers)
5073 {
5074 struct ceph_osd_request *req;
5075 struct page **pages;
5076 int ret;
5077
5078 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5079 if (!req)
5080 return -ENOMEM;
5081
5082 ceph_oid_copy(&req->r_base_oid, oid);
5083 ceph_oloc_copy(&req->r_base_oloc, oloc);
5084 req->r_flags = CEPH_OSD_FLAG_READ;
5085
5086 pages = ceph_alloc_page_vector(1, GFP_NOIO);
5087 if (IS_ERR(pages)) {
5088 ret = PTR_ERR(pages);
5089 goto out_put_req;
5090 }
5091
5092 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
5093 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
5094 response_data),
5095 pages, PAGE_SIZE, 0, false, true);
5096
5097 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5098 if (ret)
5099 goto out_put_req;
5100
5101 ceph_osdc_start_request(osdc, req, false);
5102 ret = ceph_osdc_wait_request(osdc, req);
5103 if (ret >= 0) {
5104 void *p = page_address(pages[0]);
5105 void *const end = p + req->r_ops[0].outdata_len;
5106
5107 ret = decode_watchers(&p, end, watchers, num_watchers);
5108 }
5109
5110 out_put_req:
5111 ceph_osdc_put_request(req);
5112 return ret;
5113 }
5114 EXPORT_SYMBOL(ceph_osdc_list_watchers);
5115
5116 /*
5117 * Call all pending notify callbacks - for use after a watch is
5118 * unregistered, to make sure no more callbacks for it will be invoked
5119 */
5120 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
5121 {
5122 dout("%s osdc %p\n", __func__, osdc);
5123 flush_workqueue(osdc->notify_wq);
5124 }
5125 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5126
5127 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5128 {
5129 down_read(&osdc->lock);
5130 maybe_request_map(osdc);
5131 up_read(&osdc->lock);
5132 }
5133 EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
5134
5135 /*
5136 * Execute an OSD class method on an object.
5137 *
5138 * @flags: CEPH_OSD_FLAG_*
5139 * @resp_len: in/out param for reply length
5140 */
5141 int ceph_osdc_call(struct ceph_osd_client *osdc,
5142 struct ceph_object_id *oid,
5143 struct ceph_object_locator *oloc,
5144 const char *class, const char *method,
5145 unsigned int flags,
5146 struct page *req_page, size_t req_len,
5147 struct page **resp_pages, size_t *resp_len)
5148 {
5149 struct ceph_osd_request *req;
5150 int ret;
5151
5152 if (req_len > PAGE_SIZE)
5153 return -E2BIG;
5154
5155 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5156 if (!req)
5157 return -ENOMEM;
5158
5159 ceph_oid_copy(&req->r_base_oid, oid);
5160 ceph_oloc_copy(&req->r_base_oloc, oloc);
5161 req->r_flags = flags;
5162
5163 ret = osd_req_op_cls_init(req, 0, class, method);
5164 if (ret)
5165 goto out_put_req;
5166
5167 if (req_page)
5168 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5169 0, false, false);
5170 if (resp_pages)
5171 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
5172 *resp_len, 0, false, false);
5173
5174 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5175 if (ret)
5176 goto out_put_req;
5177
5178 ceph_osdc_start_request(osdc, req, false);
5179 ret = ceph_osdc_wait_request(osdc, req);
5180 if (ret >= 0) {
5181 ret = req->r_ops[0].rval;
5182 if (resp_pages)
5183 *resp_len = req->r_ops[0].outdata_len;
5184 }
5185
5186 out_put_req:
5187 ceph_osdc_put_request(req);
5188 return ret;
5189 }
5190 EXPORT_SYMBOL(ceph_osdc_call);
5191
5192 /*
5193 * reset all osd connections
5194 */
5195 void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc)
5196 {
5197 struct rb_node *n;
5198
5199 down_write(&osdc->lock);
5200 for (n = rb_first(&osdc->osds); n; ) {
5201 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
5202
5203 n = rb_next(n);
5204 if (!reopen_osd(osd))
5205 kick_osd_requests(osd);
5206 }
5207 up_write(&osdc->lock);
5208 }
5209
5210 /*
5211 * init, shutdown
5212 */
5213 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5214 {
5215 int err;
5216
5217 dout("init\n");
5218 osdc->client = client;
5219 init_rwsem(&osdc->lock);
5220 osdc->osds = RB_ROOT;
5221 INIT_LIST_HEAD(&osdc->osd_lru);
5222 spin_lock_init(&osdc->osd_lru_lock);
5223 osd_init(&osdc->homeless_osd);
5224 osdc->homeless_osd.o_osdc = osdc;
5225 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
5226 osdc->last_linger_id = CEPH_LINGER_ID_START;
5227 osdc->linger_requests = RB_ROOT;
5228 osdc->map_checks = RB_ROOT;
5229 osdc->linger_map_checks = RB_ROOT;
5230 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
5231 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5232
5233 err = -ENOMEM;
5234 osdc->osdmap = ceph_osdmap_alloc();
5235 if (!osdc->osdmap)
5236 goto out;
5237
5238 osdc->req_mempool = mempool_create_slab_pool(10,
5239 ceph_osd_request_cache);
5240 if (!osdc->req_mempool)
5241 goto out_map;
5242
5243 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
5244 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
5245 if (err < 0)
5246 goto out_mempool;
5247 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
5248 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5249 "osd_op_reply");
5250 if (err < 0)
5251 goto out_msgpool;
5252
5253 err = -ENOMEM;
5254 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
5255 if (!osdc->notify_wq)
5256 goto out_msgpool_reply;
5257
5258 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5259 if (!osdc->completion_wq)
5260 goto out_notify_wq;
5261
5262 schedule_delayed_work(&osdc->timeout_work,
5263 osdc->client->options->osd_keepalive_timeout);
5264 schedule_delayed_work(&osdc->osds_timeout_work,
5265 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5266
5267 return 0;
5268
5269 out_notify_wq:
5270 destroy_workqueue(osdc->notify_wq);
5271 out_msgpool_reply:
5272 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5273 out_msgpool:
5274 ceph_msgpool_destroy(&osdc->msgpool_op);
5275 out_mempool:
5276 mempool_destroy(osdc->req_mempool);
5277 out_map:
5278 ceph_osdmap_destroy(osdc->osdmap);
5279 out:
5280 return err;
5281 }
5282
5283 void ceph_osdc_stop(struct ceph_osd_client *osdc)
5284 {
5285 destroy_workqueue(osdc->completion_wq);
5286 destroy_workqueue(osdc->notify_wq);
5287 cancel_delayed_work_sync(&osdc->timeout_work);
5288 cancel_delayed_work_sync(&osdc->osds_timeout_work);
5289
5290 down_write(&osdc->lock);
5291 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5292 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5293 struct ceph_osd, o_node);
5294 close_osd(osd);
5295 }
5296 up_write(&osdc->lock);
5297 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5298 osd_cleanup(&osdc->homeless_osd);
5299
5300 WARN_ON(!list_empty(&osdc->osd_lru));
5301 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
5302 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5303 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5304 WARN_ON(atomic_read(&osdc->num_requests));
5305 WARN_ON(atomic_read(&osdc->num_homeless));
5306
5307 ceph_osdmap_destroy(osdc->osdmap);
5308 mempool_destroy(osdc->req_mempool);
5309 ceph_msgpool_destroy(&osdc->msgpool_op);
5310 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5311 }
5312
5313 static int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5314 u64 src_snapid, u64 src_version,
5315 struct ceph_object_id *src_oid,
5316 struct ceph_object_locator *src_oloc,
5317 u32 src_fadvise_flags,
5318 u32 dst_fadvise_flags,
5319 u32 truncate_seq, u64 truncate_size,
5320 u8 copy_from_flags)
5321 {
5322 struct ceph_osd_req_op *op;
5323 struct page **pages;
5324 void *p, *end;
5325
5326 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5327 if (IS_ERR(pages))
5328 return PTR_ERR(pages);
5329
5330 op = osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2,
5331 dst_fadvise_flags);
5332 op->copy_from.snapid = src_snapid;
5333 op->copy_from.src_version = src_version;
5334 op->copy_from.flags = copy_from_flags;
5335 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5336
5337 p = page_address(pages[0]);
5338 end = p + PAGE_SIZE;
5339 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5340 encode_oloc(&p, end, src_oloc);
5341 ceph_encode_32(&p, truncate_seq);
5342 ceph_encode_64(&p, truncate_size);
5343 op->indata_len = PAGE_SIZE - (end - p);
5344
5345 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5346 op->indata_len, 0, false, true);
5347 return 0;
5348 }
5349
5350 int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
5351 u64 src_snapid, u64 src_version,
5352 struct ceph_object_id *src_oid,
5353 struct ceph_object_locator *src_oloc,
5354 u32 src_fadvise_flags,
5355 struct ceph_object_id *dst_oid,
5356 struct ceph_object_locator *dst_oloc,
5357 u32 dst_fadvise_flags,
5358 u32 truncate_seq, u64 truncate_size,
5359 u8 copy_from_flags)
5360 {
5361 struct ceph_osd_request *req;
5362 int ret;
5363
5364 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL);
5365 if (!req)
5366 return -ENOMEM;
5367
5368 req->r_flags = CEPH_OSD_FLAG_WRITE;
5369
5370 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
5371 ceph_oid_copy(&req->r_t.base_oid, dst_oid);
5372
5373 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid,
5374 src_oloc, src_fadvise_flags,
5375 dst_fadvise_flags, truncate_seq,
5376 truncate_size, copy_from_flags);
5377 if (ret)
5378 goto out;
5379
5380 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL);
5381 if (ret)
5382 goto out;
5383
5384 ceph_osdc_start_request(osdc, req, false);
5385 ret = ceph_osdc_wait_request(osdc, req);
5386
5387 out:
5388 ceph_osdc_put_request(req);
5389 return ret;
5390 }
5391 EXPORT_SYMBOL(ceph_osdc_copy_from);
5392
5393 int __init ceph_osdc_setup(void)
5394 {
5395 size_t size = sizeof(struct ceph_osd_request) +
5396 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5397
5398 BUG_ON(ceph_osd_request_cache);
5399 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5400 0, 0, NULL);
5401
5402 return ceph_osd_request_cache ? 0 : -ENOMEM;
5403 }
5404
5405 void ceph_osdc_cleanup(void)
5406 {
5407 BUG_ON(!ceph_osd_request_cache);
5408 kmem_cache_destroy(ceph_osd_request_cache);
5409 ceph_osd_request_cache = NULL;
5410 }
5411
5412 /*
5413 * handle incoming message
5414 */
5415 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5416 {
5417 struct ceph_osd *osd = con->private;
5418 struct ceph_osd_client *osdc = osd->o_osdc;
5419 int type = le16_to_cpu(msg->hdr.type);
5420
5421 switch (type) {
5422 case CEPH_MSG_OSD_MAP:
5423 ceph_osdc_handle_map(osdc, msg);
5424 break;
5425 case CEPH_MSG_OSD_OPREPLY:
5426 handle_reply(osd, msg);
5427 break;
5428 case CEPH_MSG_OSD_BACKOFF:
5429 handle_backoff(osd, msg);
5430 break;
5431 case CEPH_MSG_WATCH_NOTIFY:
5432 handle_watch_notify(osdc, msg);
5433 break;
5434
5435 default:
5436 pr_err("received unknown message type %d %s\n", type,
5437 ceph_msg_type_name(type));
5438 }
5439
5440 ceph_msg_put(msg);
5441 }
5442
5443 /*
5444 * Lookup and return message for incoming reply. Don't try to do
5445 * anything about a larger than preallocated data portion of the
5446 * message at the moment - for now, just skip the message.
5447 */
5448 static struct ceph_msg *get_reply(struct ceph_connection *con,
5449 struct ceph_msg_header *hdr,
5450 int *skip)
5451 {
5452 struct ceph_osd *osd = con->private;
5453 struct ceph_osd_client *osdc = osd->o_osdc;
5454 struct ceph_msg *m = NULL;
5455 struct ceph_osd_request *req;
5456 int front_len = le32_to_cpu(hdr->front_len);
5457 int data_len = le32_to_cpu(hdr->data_len);
5458 u64 tid = le64_to_cpu(hdr->tid);
5459
5460 down_read(&osdc->lock);
5461 if (!osd_registered(osd)) {
5462 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5463 *skip = 1;
5464 goto out_unlock_osdc;
5465 }
5466 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5467
5468 mutex_lock(&osd->lock);
5469 req = lookup_request(&osd->o_requests, tid);
5470 if (!req) {
5471 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5472 osd->o_osd, tid);
5473 *skip = 1;
5474 goto out_unlock_session;
5475 }
5476
5477 ceph_msg_revoke_incoming(req->r_reply);
5478
5479 if (front_len > req->r_reply->front_alloc_len) {
5480 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5481 __func__, osd->o_osd, req->r_tid, front_len,
5482 req->r_reply->front_alloc_len);
5483 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5484 false);
5485 if (!m)
5486 goto out_unlock_session;
5487 ceph_msg_put(req->r_reply);
5488 req->r_reply = m;
5489 }
5490
5491 if (data_len > req->r_reply->data_length) {
5492 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5493 __func__, osd->o_osd, req->r_tid, data_len,
5494 req->r_reply->data_length);
5495 m = NULL;
5496 *skip = 1;
5497 goto out_unlock_session;
5498 }
5499
5500 m = ceph_msg_get(req->r_reply);
5501 dout("get_reply tid %lld %p\n", tid, m);
5502
5503 out_unlock_session:
5504 mutex_unlock(&osd->lock);
5505 out_unlock_osdc:
5506 up_read(&osdc->lock);
5507 return m;
5508 }
5509
5510 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5511 {
5512 struct ceph_msg *m;
5513 int type = le16_to_cpu(hdr->type);
5514 u32 front_len = le32_to_cpu(hdr->front_len);
5515 u32 data_len = le32_to_cpu(hdr->data_len);
5516
5517 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
5518 if (!m)
5519 return NULL;
5520
5521 if (data_len) {
5522 struct page **pages;
5523
5524 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5525 GFP_NOIO);
5526 if (IS_ERR(pages)) {
5527 ceph_msg_put(m);
5528 return NULL;
5529 }
5530
5531 ceph_msg_data_add_pages(m, pages, data_len, 0, true);
5532 }
5533
5534 return m;
5535 }
5536
5537 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5538 struct ceph_msg_header *hdr,
5539 int *skip)
5540 {
5541 struct ceph_osd *osd = con->private;
5542 int type = le16_to_cpu(hdr->type);
5543
5544 *skip = 0;
5545 switch (type) {
5546 case CEPH_MSG_OSD_MAP:
5547 case CEPH_MSG_OSD_BACKOFF:
5548 case CEPH_MSG_WATCH_NOTIFY:
5549 return alloc_msg_with_page_vector(hdr);
5550 case CEPH_MSG_OSD_OPREPLY:
5551 return get_reply(con, hdr, skip);
5552 default:
5553 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5554 osd->o_osd, type);
5555 *skip = 1;
5556 return NULL;
5557 }
5558 }
5559
5560 /*
5561 * Wrappers to refcount containing ceph_osd struct
5562 */
5563 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5564 {
5565 struct ceph_osd *osd = con->private;
5566 if (get_osd(osd))
5567 return con;
5568 return NULL;
5569 }
5570
5571 static void put_osd_con(struct ceph_connection *con)
5572 {
5573 struct ceph_osd *osd = con->private;
5574 put_osd(osd);
5575 }
5576
5577 /*
5578 * authentication
5579 */
5580
5581 /*
5582 * Note: returned pointer is the address of a structure that's
5583 * managed separately. Caller must *not* attempt to free it.
5584 */
5585 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
5586 int *proto, int force_new)
5587 {
5588 struct ceph_osd *o = con->private;
5589 struct ceph_osd_client *osdc = o->o_osdc;
5590 struct ceph_auth_client *ac = osdc->client->monc.auth;
5591 struct ceph_auth_handshake *auth = &o->o_auth;
5592 int ret;
5593
5594 ret = __ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD,
5595 force_new, proto, NULL, NULL);
5596 if (ret)
5597 return ERR_PTR(ret);
5598
5599 return auth;
5600 }
5601
5602 static int add_authorizer_challenge(struct ceph_connection *con,
5603 void *challenge_buf, int challenge_buf_len)
5604 {
5605 struct ceph_osd *o = con->private;
5606 struct ceph_osd_client *osdc = o->o_osdc;
5607 struct ceph_auth_client *ac = osdc->client->monc.auth;
5608
5609 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5610 challenge_buf, challenge_buf_len);
5611 }
5612
5613 static int verify_authorizer_reply(struct ceph_connection *con)
5614 {
5615 struct ceph_osd *o = con->private;
5616 struct ceph_osd_client *osdc = o->o_osdc;
5617 struct ceph_auth_client *ac = osdc->client->monc.auth;
5618 struct ceph_auth_handshake *auth = &o->o_auth;
5619
5620 return ceph_auth_verify_authorizer_reply(ac, auth->authorizer,
5621 auth->authorizer_reply_buf, auth->authorizer_reply_buf_len,
5622 NULL, NULL, NULL, NULL);
5623 }
5624
5625 static int invalidate_authorizer(struct ceph_connection *con)
5626 {
5627 struct ceph_osd *o = con->private;
5628 struct ceph_osd_client *osdc = o->o_osdc;
5629 struct ceph_auth_client *ac = osdc->client->monc.auth;
5630
5631 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5632 return ceph_monc_validate_auth(&osdc->client->monc);
5633 }
5634
5635 static int osd_get_auth_request(struct ceph_connection *con,
5636 void *buf, int *buf_len,
5637 void **authorizer, int *authorizer_len)
5638 {
5639 struct ceph_osd *o = con->private;
5640 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5641 struct ceph_auth_handshake *auth = &o->o_auth;
5642 int ret;
5643
5644 ret = ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD,
5645 buf, buf_len);
5646 if (ret)
5647 return ret;
5648
5649 *authorizer = auth->authorizer_buf;
5650 *authorizer_len = auth->authorizer_buf_len;
5651 return 0;
5652 }
5653
5654 static int osd_handle_auth_reply_more(struct ceph_connection *con,
5655 void *reply, int reply_len,
5656 void *buf, int *buf_len,
5657 void **authorizer, int *authorizer_len)
5658 {
5659 struct ceph_osd *o = con->private;
5660 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5661 struct ceph_auth_handshake *auth = &o->o_auth;
5662 int ret;
5663
5664 ret = ceph_auth_handle_svc_reply_more(ac, auth, reply, reply_len,
5665 buf, buf_len);
5666 if (ret)
5667 return ret;
5668
5669 *authorizer = auth->authorizer_buf;
5670 *authorizer_len = auth->authorizer_buf_len;
5671 return 0;
5672 }
5673
5674 static int osd_handle_auth_done(struct ceph_connection *con,
5675 u64 global_id, void *reply, int reply_len,
5676 u8 *session_key, int *session_key_len,
5677 u8 *con_secret, int *con_secret_len)
5678 {
5679 struct ceph_osd *o = con->private;
5680 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5681 struct ceph_auth_handshake *auth = &o->o_auth;
5682
5683 return ceph_auth_handle_svc_reply_done(ac, auth, reply, reply_len,
5684 session_key, session_key_len,
5685 con_secret, con_secret_len);
5686 }
5687
5688 static int osd_handle_auth_bad_method(struct ceph_connection *con,
5689 int used_proto, int result,
5690 const int *allowed_protos, int proto_cnt,
5691 const int *allowed_modes, int mode_cnt)
5692 {
5693 struct ceph_osd *o = con->private;
5694 struct ceph_mon_client *monc = &o->o_osdc->client->monc;
5695 int ret;
5696
5697 if (ceph_auth_handle_bad_authorizer(monc->auth, CEPH_ENTITY_TYPE_OSD,
5698 used_proto, result,
5699 allowed_protos, proto_cnt,
5700 allowed_modes, mode_cnt)) {
5701 ret = ceph_monc_validate_auth(monc);
5702 if (ret)
5703 return ret;
5704 }
5705
5706 return -EACCES;
5707 }
5708
5709 static void osd_reencode_message(struct ceph_msg *msg)
5710 {
5711 int type = le16_to_cpu(msg->hdr.type);
5712
5713 if (type == CEPH_MSG_OSD_OP)
5714 encode_request_finish(msg);
5715 }
5716
5717 static int osd_sign_message(struct ceph_msg *msg)
5718 {
5719 struct ceph_osd *o = msg->con->private;
5720 struct ceph_auth_handshake *auth = &o->o_auth;
5721
5722 return ceph_auth_sign_message(auth, msg);
5723 }
5724
5725 static int osd_check_message_signature(struct ceph_msg *msg)
5726 {
5727 struct ceph_osd *o = msg->con->private;
5728 struct ceph_auth_handshake *auth = &o->o_auth;
5729
5730 return ceph_auth_check_message_signature(auth, msg);
5731 }
5732
5733 static const struct ceph_connection_operations osd_con_ops = {
5734 .get = get_osd_con,
5735 .put = put_osd_con,
5736 .dispatch = dispatch,
5737 .get_authorizer = get_authorizer,
5738 .add_authorizer_challenge = add_authorizer_challenge,
5739 .verify_authorizer_reply = verify_authorizer_reply,
5740 .invalidate_authorizer = invalidate_authorizer,
5741 .alloc_msg = alloc_msg,
5742 .reencode_message = osd_reencode_message,
5743 .sign_message = osd_sign_message,
5744 .check_message_signature = osd_check_message_signature,
5745 .fault = osd_fault,
5746 .get_auth_request = osd_get_auth_request,
5747 .handle_auth_reply_more = osd_handle_auth_reply_more,
5748 .handle_auth_done = osd_handle_auth_done,
5749 .handle_auth_bad_method = osd_handle_auth_bad_method,
5750 };
Linux with added FPC-III support