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 void ceph_osd_iter_init(struct ceph_osd_data *osd_data,
175 struct iov_iter *iter)
176 {
177 osd_data->type = CEPH_OSD_DATA_TYPE_ITER;
178 osd_data->iter = *iter;
179 }
180
181 static struct ceph_osd_data *
182 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
183 {
184 BUG_ON(which >= osd_req->r_num_ops);
185
186 return &osd_req->r_ops[which].raw_data_in;
187 }
188
189 struct ceph_osd_data *
190 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
191 unsigned int which)
192 {
193 return osd_req_op_data(osd_req, which, extent, osd_data);
194 }
195 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
196
197 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
198 unsigned int which, struct page **pages,
199 u64 length, u32 alignment,
200 bool pages_from_pool, bool own_pages)
201 {
202 struct ceph_osd_data *osd_data;
203
204 osd_data = osd_req_op_raw_data_in(osd_req, which);
205 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
206 pages_from_pool, own_pages);
207 }
208 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
209
210 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
211 unsigned int which, struct page **pages,
212 u64 length, u32 alignment,
213 bool pages_from_pool, bool own_pages)
214 {
215 struct ceph_osd_data *osd_data;
216
217 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
218 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
219 pages_from_pool, own_pages);
220 }
221 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
222
223 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
224 unsigned int which, struct ceph_pagelist *pagelist)
225 {
226 struct ceph_osd_data *osd_data;
227
228 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
229 ceph_osd_data_pagelist_init(osd_data, pagelist);
230 }
231 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
232
233 #ifdef CONFIG_BLOCK
234 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
235 unsigned int which,
236 struct ceph_bio_iter *bio_pos,
237 u32 bio_length)
238 {
239 struct ceph_osd_data *osd_data;
240
241 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
242 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
243 }
244 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
245 #endif /* CONFIG_BLOCK */
246
247 void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
248 unsigned int which,
249 struct bio_vec *bvecs, u32 num_bvecs,
250 u32 bytes)
251 {
252 struct ceph_osd_data *osd_data;
253 struct ceph_bvec_iter it = {
254 .bvecs = bvecs,
255 .iter = { .bi_size = bytes },
256 };
257
258 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
259 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
260 }
261 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
262
263 void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
264 unsigned int which,
265 struct ceph_bvec_iter *bvec_pos)
266 {
267 struct ceph_osd_data *osd_data;
268
269 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
270 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
271 }
272 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
273
274 /**
275 * osd_req_op_extent_osd_iter - Set up an operation with an iterator buffer
276 * @osd_req: The request to set up
277 * @which: Index of the operation in which to set the iter
278 * @iter: The buffer iterator
279 */
280 void osd_req_op_extent_osd_iter(struct ceph_osd_request *osd_req,
281 unsigned int which, struct iov_iter *iter)
282 {
283 struct ceph_osd_data *osd_data;
284
285 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
286 ceph_osd_iter_init(osd_data, iter);
287 }
288 EXPORT_SYMBOL(osd_req_op_extent_osd_iter);
289
290 static void osd_req_op_cls_request_info_pagelist(
291 struct ceph_osd_request *osd_req,
292 unsigned int which, struct ceph_pagelist *pagelist)
293 {
294 struct ceph_osd_data *osd_data;
295
296 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
297 ceph_osd_data_pagelist_init(osd_data, pagelist);
298 }
299
300 void osd_req_op_cls_request_data_pagelist(
301 struct ceph_osd_request *osd_req,
302 unsigned int which, struct ceph_pagelist *pagelist)
303 {
304 struct ceph_osd_data *osd_data;
305
306 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
307 ceph_osd_data_pagelist_init(osd_data, pagelist);
308 osd_req->r_ops[which].cls.indata_len += pagelist->length;
309 osd_req->r_ops[which].indata_len += pagelist->length;
310 }
311 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
312
313 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
314 unsigned int which, struct page **pages, u64 length,
315 u32 alignment, bool pages_from_pool, bool own_pages)
316 {
317 struct ceph_osd_data *osd_data;
318
319 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
320 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
321 pages_from_pool, own_pages);
322 osd_req->r_ops[which].cls.indata_len += length;
323 osd_req->r_ops[which].indata_len += length;
324 }
325 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
326
327 void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
328 unsigned int which,
329 struct bio_vec *bvecs, u32 num_bvecs,
330 u32 bytes)
331 {
332 struct ceph_osd_data *osd_data;
333 struct ceph_bvec_iter it = {
334 .bvecs = bvecs,
335 .iter = { .bi_size = bytes },
336 };
337
338 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
339 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
340 osd_req->r_ops[which].cls.indata_len += bytes;
341 osd_req->r_ops[which].indata_len += bytes;
342 }
343 EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
344
345 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
346 unsigned int which, struct page **pages, u64 length,
347 u32 alignment, bool pages_from_pool, bool own_pages)
348 {
349 struct ceph_osd_data *osd_data;
350
351 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
352 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
353 pages_from_pool, own_pages);
354 }
355 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
356
357 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
358 {
359 switch (osd_data->type) {
360 case CEPH_OSD_DATA_TYPE_NONE:
361 return 0;
362 case CEPH_OSD_DATA_TYPE_PAGES:
363 return osd_data->length;
364 case CEPH_OSD_DATA_TYPE_PAGELIST:
365 return (u64)osd_data->pagelist->length;
366 #ifdef CONFIG_BLOCK
367 case CEPH_OSD_DATA_TYPE_BIO:
368 return (u64)osd_data->bio_length;
369 #endif /* CONFIG_BLOCK */
370 case CEPH_OSD_DATA_TYPE_BVECS:
371 return osd_data->bvec_pos.iter.bi_size;
372 case CEPH_OSD_DATA_TYPE_ITER:
373 return iov_iter_count(&osd_data->iter);
374 default:
375 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
376 return 0;
377 }
378 }
379
380 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
381 {
382 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
383 int num_pages;
384
385 num_pages = calc_pages_for((u64)osd_data->alignment,
386 (u64)osd_data->length);
387 ceph_release_page_vector(osd_data->pages, num_pages);
388 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
389 ceph_pagelist_release(osd_data->pagelist);
390 }
391 ceph_osd_data_init(osd_data);
392 }
393
394 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
395 unsigned int which)
396 {
397 struct ceph_osd_req_op *op;
398
399 BUG_ON(which >= osd_req->r_num_ops);
400 op = &osd_req->r_ops[which];
401
402 switch (op->op) {
403 case CEPH_OSD_OP_READ:
404 case CEPH_OSD_OP_SPARSE_READ:
405 case CEPH_OSD_OP_WRITE:
406 case CEPH_OSD_OP_WRITEFULL:
407 kfree(op->extent.sparse_ext);
408 ceph_osd_data_release(&op->extent.osd_data);
409 break;
410 case CEPH_OSD_OP_CALL:
411 ceph_osd_data_release(&op->cls.request_info);
412 ceph_osd_data_release(&op->cls.request_data);
413 ceph_osd_data_release(&op->cls.response_data);
414 break;
415 case CEPH_OSD_OP_SETXATTR:
416 case CEPH_OSD_OP_CMPXATTR:
417 ceph_osd_data_release(&op->xattr.osd_data);
418 break;
419 case CEPH_OSD_OP_STAT:
420 ceph_osd_data_release(&op->raw_data_in);
421 break;
422 case CEPH_OSD_OP_NOTIFY_ACK:
423 ceph_osd_data_release(&op->notify_ack.request_data);
424 break;
425 case CEPH_OSD_OP_NOTIFY:
426 ceph_osd_data_release(&op->notify.request_data);
427 ceph_osd_data_release(&op->notify.response_data);
428 break;
429 case CEPH_OSD_OP_LIST_WATCHERS:
430 ceph_osd_data_release(&op->list_watchers.response_data);
431 break;
432 case CEPH_OSD_OP_COPY_FROM2:
433 ceph_osd_data_release(&op->copy_from.osd_data);
434 break;
435 default:
436 break;
437 }
438 }
439
440 /*
441 * Assumes @t is zero-initialized.
442 */
443 static void target_init(struct ceph_osd_request_target *t)
444 {
445 ceph_oid_init(&t->base_oid);
446 ceph_oloc_init(&t->base_oloc);
447 ceph_oid_init(&t->target_oid);
448 ceph_oloc_init(&t->target_oloc);
449
450 ceph_osds_init(&t->acting);
451 ceph_osds_init(&t->up);
452 t->size = -1;
453 t->min_size = -1;
454
455 t->osd = CEPH_HOMELESS_OSD;
456 }
457
458 static void target_copy(struct ceph_osd_request_target *dest,
459 const struct ceph_osd_request_target *src)
460 {
461 ceph_oid_copy(&dest->base_oid, &src->base_oid);
462 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
463 ceph_oid_copy(&dest->target_oid, &src->target_oid);
464 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
465
466 dest->pgid = src->pgid; /* struct */
467 dest->spgid = src->spgid; /* struct */
468 dest->pg_num = src->pg_num;
469 dest->pg_num_mask = src->pg_num_mask;
470 ceph_osds_copy(&dest->acting, &src->acting);
471 ceph_osds_copy(&dest->up, &src->up);
472 dest->size = src->size;
473 dest->min_size = src->min_size;
474 dest->sort_bitwise = src->sort_bitwise;
475 dest->recovery_deletes = src->recovery_deletes;
476
477 dest->flags = src->flags;
478 dest->used_replica = src->used_replica;
479 dest->paused = src->paused;
480
481 dest->epoch = src->epoch;
482 dest->last_force_resend = src->last_force_resend;
483
484 dest->osd = src->osd;
485 }
486
487 static void target_destroy(struct ceph_osd_request_target *t)
488 {
489 ceph_oid_destroy(&t->base_oid);
490 ceph_oloc_destroy(&t->base_oloc);
491 ceph_oid_destroy(&t->target_oid);
492 ceph_oloc_destroy(&t->target_oloc);
493 }
494
495 /*
496 * requests
497 */
498 static void request_release_checks(struct ceph_osd_request *req)
499 {
500 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
501 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
502 WARN_ON(!list_empty(&req->r_private_item));
503 WARN_ON(req->r_osd);
504 }
505
506 static void ceph_osdc_release_request(struct kref *kref)
507 {
508 struct ceph_osd_request *req = container_of(kref,
509 struct ceph_osd_request, r_kref);
510 unsigned int which;
511
512 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
513 req->r_request, req->r_reply);
514 request_release_checks(req);
515
516 if (req->r_request)
517 ceph_msg_put(req->r_request);
518 if (req->r_reply)
519 ceph_msg_put(req->r_reply);
520
521 for (which = 0; which < req->r_num_ops; which++)
522 osd_req_op_data_release(req, which);
523
524 target_destroy(&req->r_t);
525 ceph_put_snap_context(req->r_snapc);
526
527 if (req->r_mempool)
528 mempool_free(req, req->r_osdc->req_mempool);
529 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
530 kmem_cache_free(ceph_osd_request_cache, req);
531 else
532 kfree(req);
533 }
534
535 void ceph_osdc_get_request(struct ceph_osd_request *req)
536 {
537 dout("%s %p (was %d)\n", __func__, req,
538 kref_read(&req->r_kref));
539 kref_get(&req->r_kref);
540 }
541 EXPORT_SYMBOL(ceph_osdc_get_request);
542
543 void ceph_osdc_put_request(struct ceph_osd_request *req)
544 {
545 if (req) {
546 dout("%s %p (was %d)\n", __func__, req,
547 kref_read(&req->r_kref));
548 kref_put(&req->r_kref, ceph_osdc_release_request);
549 }
550 }
551 EXPORT_SYMBOL(ceph_osdc_put_request);
552
553 static void request_init(struct ceph_osd_request *req)
554 {
555 /* req only, each op is zeroed in osd_req_op_init() */
556 memset(req, 0, sizeof(*req));
557
558 kref_init(&req->r_kref);
559 init_completion(&req->r_completion);
560 RB_CLEAR_NODE(&req->r_node);
561 RB_CLEAR_NODE(&req->r_mc_node);
562 INIT_LIST_HEAD(&req->r_private_item);
563
564 target_init(&req->r_t);
565 }
566
567 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
568 struct ceph_snap_context *snapc,
569 unsigned int num_ops,
570 bool use_mempool,
571 gfp_t gfp_flags)
572 {
573 struct ceph_osd_request *req;
574
575 if (use_mempool) {
576 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
577 req = mempool_alloc(osdc->req_mempool, gfp_flags);
578 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
579 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
580 } else {
581 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
582 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
583 }
584 if (unlikely(!req))
585 return NULL;
586
587 request_init(req);
588 req->r_osdc = osdc;
589 req->r_mempool = use_mempool;
590 req->r_num_ops = num_ops;
591 req->r_snapid = CEPH_NOSNAP;
592 req->r_snapc = ceph_get_snap_context(snapc);
593
594 dout("%s req %p\n", __func__, req);
595 return req;
596 }
597 EXPORT_SYMBOL(ceph_osdc_alloc_request);
598
599 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
600 {
601 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
602 }
603
604 static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
605 int num_request_data_items,
606 int num_reply_data_items)
607 {
608 struct ceph_osd_client *osdc = req->r_osdc;
609 struct ceph_msg *msg;
610 int msg_size;
611
612 WARN_ON(req->r_request || req->r_reply);
613 WARN_ON(ceph_oid_empty(&req->r_base_oid));
614 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
615
616 /* create request message */
617 msg_size = CEPH_ENCODING_START_BLK_LEN +
618 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
619 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
620 msg_size += CEPH_ENCODING_START_BLK_LEN +
621 sizeof(struct ceph_osd_reqid); /* reqid */
622 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
623 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
624 msg_size += CEPH_ENCODING_START_BLK_LEN +
625 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
626 msg_size += 4 + req->r_base_oid.name_len; /* oid */
627 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
628 msg_size += 8; /* snapid */
629 msg_size += 8; /* snap_seq */
630 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
631 msg_size += 4 + 8; /* retry_attempt, features */
632
633 if (req->r_mempool)
634 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
635 num_request_data_items);
636 else
637 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
638 num_request_data_items, gfp, true);
639 if (!msg)
640 return -ENOMEM;
641
642 memset(msg->front.iov_base, 0, msg->front.iov_len);
643 req->r_request = msg;
644
645 /* create reply message */
646 msg_size = OSD_OPREPLY_FRONT_LEN;
647 msg_size += req->r_base_oid.name_len;
648 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
649
650 if (req->r_mempool)
651 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
652 num_reply_data_items);
653 else
654 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
655 num_reply_data_items, gfp, true);
656 if (!msg)
657 return -ENOMEM;
658
659 req->r_reply = msg;
660
661 return 0;
662 }
663
664 static bool osd_req_opcode_valid(u16 opcode)
665 {
666 switch (opcode) {
667 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
668 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
669 #undef GENERATE_CASE
670 default:
671 return false;
672 }
673 }
674
675 static void get_num_data_items(struct ceph_osd_request *req,
676 int *num_request_data_items,
677 int *num_reply_data_items)
678 {
679 struct ceph_osd_req_op *op;
680
681 *num_request_data_items = 0;
682 *num_reply_data_items = 0;
683
684 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
685 switch (op->op) {
686 /* request */
687 case CEPH_OSD_OP_WRITE:
688 case CEPH_OSD_OP_WRITEFULL:
689 case CEPH_OSD_OP_SETXATTR:
690 case CEPH_OSD_OP_CMPXATTR:
691 case CEPH_OSD_OP_NOTIFY_ACK:
692 case CEPH_OSD_OP_COPY_FROM2:
693 *num_request_data_items += 1;
694 break;
695
696 /* reply */
697 case CEPH_OSD_OP_STAT:
698 case CEPH_OSD_OP_READ:
699 case CEPH_OSD_OP_SPARSE_READ:
700 case CEPH_OSD_OP_LIST_WATCHERS:
701 *num_reply_data_items += 1;
702 break;
703
704 /* both */
705 case CEPH_OSD_OP_NOTIFY:
706 *num_request_data_items += 1;
707 *num_reply_data_items += 1;
708 break;
709 case CEPH_OSD_OP_CALL:
710 *num_request_data_items += 2;
711 *num_reply_data_items += 1;
712 break;
713
714 default:
715 WARN_ON(!osd_req_opcode_valid(op->op));
716 break;
717 }
718 }
719 }
720
721 /*
722 * oid, oloc and OSD op opcode(s) must be filled in before this function
723 * is called.
724 */
725 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
726 {
727 int num_request_data_items, num_reply_data_items;
728
729 get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
730 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
731 num_reply_data_items);
732 }
733 EXPORT_SYMBOL(ceph_osdc_alloc_messages);
734
735 /*
736 * This is an osd op init function for opcodes that have no data or
737 * other information associated with them. It also serves as a
738 * common init routine for all the other init functions, below.
739 */
740 struct ceph_osd_req_op *
741 osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
742 u16 opcode, u32 flags)
743 {
744 struct ceph_osd_req_op *op;
745
746 BUG_ON(which >= osd_req->r_num_ops);
747 BUG_ON(!osd_req_opcode_valid(opcode));
748
749 op = &osd_req->r_ops[which];
750 memset(op, 0, sizeof (*op));
751 op->op = opcode;
752 op->flags = flags;
753
754 return op;
755 }
756 EXPORT_SYMBOL(osd_req_op_init);
757
758 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
759 unsigned int which, u16 opcode,
760 u64 offset, u64 length,
761 u64 truncate_size, u32 truncate_seq)
762 {
763 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
764 opcode, 0);
765 size_t payload_len = 0;
766
767 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
768 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
769 opcode != CEPH_OSD_OP_TRUNCATE && opcode != CEPH_OSD_OP_SPARSE_READ);
770
771 op->extent.offset = offset;
772 op->extent.length = length;
773 op->extent.truncate_size = truncate_size;
774 op->extent.truncate_seq = truncate_seq;
775 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
776 payload_len += length;
777
778 op->indata_len = payload_len;
779 }
780 EXPORT_SYMBOL(osd_req_op_extent_init);
781
782 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
783 unsigned int which, u64 length)
784 {
785 struct ceph_osd_req_op *op;
786 u64 previous;
787
788 BUG_ON(which >= osd_req->r_num_ops);
789 op = &osd_req->r_ops[which];
790 previous = op->extent.length;
791
792 if (length == previous)
793 return; /* Nothing to do */
794 BUG_ON(length > previous);
795
796 op->extent.length = length;
797 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
798 op->indata_len -= previous - length;
799 }
800 EXPORT_SYMBOL(osd_req_op_extent_update);
801
802 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
803 unsigned int which, u64 offset_inc)
804 {
805 struct ceph_osd_req_op *op, *prev_op;
806
807 BUG_ON(which + 1 >= osd_req->r_num_ops);
808
809 prev_op = &osd_req->r_ops[which];
810 op = osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
811 /* dup previous one */
812 op->indata_len = prev_op->indata_len;
813 op->outdata_len = prev_op->outdata_len;
814 op->extent = prev_op->extent;
815 /* adjust offset */
816 op->extent.offset += offset_inc;
817 op->extent.length -= offset_inc;
818
819 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
820 op->indata_len -= offset_inc;
821 }
822 EXPORT_SYMBOL(osd_req_op_extent_dup_last);
823
824 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
825 const char *class, const char *method)
826 {
827 struct ceph_osd_req_op *op;
828 struct ceph_pagelist *pagelist;
829 size_t payload_len = 0;
830 size_t size;
831 int ret;
832
833 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
834
835 pagelist = ceph_pagelist_alloc(GFP_NOFS);
836 if (!pagelist)
837 return -ENOMEM;
838
839 op->cls.class_name = class;
840 size = strlen(class);
841 BUG_ON(size > (size_t) U8_MAX);
842 op->cls.class_len = size;
843 ret = ceph_pagelist_append(pagelist, class, size);
844 if (ret)
845 goto err_pagelist_free;
846 payload_len += size;
847
848 op->cls.method_name = method;
849 size = strlen(method);
850 BUG_ON(size > (size_t) U8_MAX);
851 op->cls.method_len = size;
852 ret = ceph_pagelist_append(pagelist, method, size);
853 if (ret)
854 goto err_pagelist_free;
855 payload_len += size;
856
857 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
858 op->indata_len = payload_len;
859 return 0;
860
861 err_pagelist_free:
862 ceph_pagelist_release(pagelist);
863 return ret;
864 }
865 EXPORT_SYMBOL(osd_req_op_cls_init);
866
867 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
868 u16 opcode, const char *name, const void *value,
869 size_t size, u8 cmp_op, u8 cmp_mode)
870 {
871 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
872 opcode, 0);
873 struct ceph_pagelist *pagelist;
874 size_t payload_len;
875 int ret;
876
877 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
878
879 pagelist = ceph_pagelist_alloc(GFP_NOFS);
880 if (!pagelist)
881 return -ENOMEM;
882
883 payload_len = strlen(name);
884 op->xattr.name_len = payload_len;
885 ret = ceph_pagelist_append(pagelist, name, payload_len);
886 if (ret)
887 goto err_pagelist_free;
888
889 op->xattr.value_len = size;
890 ret = ceph_pagelist_append(pagelist, value, size);
891 if (ret)
892 goto err_pagelist_free;
893 payload_len += size;
894
895 op->xattr.cmp_op = cmp_op;
896 op->xattr.cmp_mode = cmp_mode;
897
898 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
899 op->indata_len = payload_len;
900 return 0;
901
902 err_pagelist_free:
903 ceph_pagelist_release(pagelist);
904 return ret;
905 }
906 EXPORT_SYMBOL(osd_req_op_xattr_init);
907
908 /*
909 * @watch_opcode: CEPH_OSD_WATCH_OP_*
910 */
911 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
912 u8 watch_opcode, u64 cookie, u32 gen)
913 {
914 struct ceph_osd_req_op *op;
915
916 op = osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
917 op->watch.cookie = cookie;
918 op->watch.op = watch_opcode;
919 op->watch.gen = gen;
920 }
921
922 /*
923 * prot_ver, timeout and notify payload (may be empty) should already be
924 * encoded in @request_pl
925 */
926 static void osd_req_op_notify_init(struct ceph_osd_request *req, int which,
927 u64 cookie, struct ceph_pagelist *request_pl)
928 {
929 struct ceph_osd_req_op *op;
930
931 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
932 op->notify.cookie = cookie;
933
934 ceph_osd_data_pagelist_init(&op->notify.request_data, request_pl);
935 op->indata_len = request_pl->length;
936 }
937
938 /*
939 * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_*
940 */
941 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
942 unsigned int which,
943 u64 expected_object_size,
944 u64 expected_write_size,
945 u32 flags)
946 {
947 struct ceph_osd_req_op *op;
948
949 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_SETALLOCHINT, 0);
950 op->alloc_hint.expected_object_size = expected_object_size;
951 op->alloc_hint.expected_write_size = expected_write_size;
952 op->alloc_hint.flags = flags;
953
954 /*
955 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
956 * not worth a feature bit. Set FAILOK per-op flag to make
957 * sure older osds don't trip over an unsupported opcode.
958 */
959 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
960 }
961 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
962
963 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
964 struct ceph_osd_data *osd_data)
965 {
966 u64 length = ceph_osd_data_length(osd_data);
967
968 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
969 BUG_ON(length > (u64) SIZE_MAX);
970 if (length)
971 ceph_msg_data_add_pages(msg, osd_data->pages,
972 length, osd_data->alignment, false);
973 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
974 BUG_ON(!length);
975 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
976 #ifdef CONFIG_BLOCK
977 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
978 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
979 #endif
980 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
981 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
982 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_ITER) {
983 ceph_msg_data_add_iter(msg, &osd_data->iter);
984 } else {
985 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
986 }
987 }
988
989 static u32 osd_req_encode_op(struct ceph_osd_op *dst,
990 const struct ceph_osd_req_op *src)
991 {
992 switch (src->op) {
993 case CEPH_OSD_OP_STAT:
994 break;
995 case CEPH_OSD_OP_READ:
996 case CEPH_OSD_OP_SPARSE_READ:
997 case CEPH_OSD_OP_WRITE:
998 case CEPH_OSD_OP_WRITEFULL:
999 case CEPH_OSD_OP_ZERO:
1000 case CEPH_OSD_OP_TRUNCATE:
1001 dst->extent.offset = cpu_to_le64(src->extent.offset);
1002 dst->extent.length = cpu_to_le64(src->extent.length);
1003 dst->extent.truncate_size =
1004 cpu_to_le64(src->extent.truncate_size);
1005 dst->extent.truncate_seq =
1006 cpu_to_le32(src->extent.truncate_seq);
1007 break;
1008 case CEPH_OSD_OP_CALL:
1009 dst->cls.class_len = src->cls.class_len;
1010 dst->cls.method_len = src->cls.method_len;
1011 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
1012 break;
1013 case CEPH_OSD_OP_WATCH:
1014 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
1015 dst->watch.ver = cpu_to_le64(0);
1016 dst->watch.op = src->watch.op;
1017 dst->watch.gen = cpu_to_le32(src->watch.gen);
1018 break;
1019 case CEPH_OSD_OP_NOTIFY_ACK:
1020 break;
1021 case CEPH_OSD_OP_NOTIFY:
1022 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
1023 break;
1024 case CEPH_OSD_OP_LIST_WATCHERS:
1025 break;
1026 case CEPH_OSD_OP_SETALLOCHINT:
1027 dst->alloc_hint.expected_object_size =
1028 cpu_to_le64(src->alloc_hint.expected_object_size);
1029 dst->alloc_hint.expected_write_size =
1030 cpu_to_le64(src->alloc_hint.expected_write_size);
1031 dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags);
1032 break;
1033 case CEPH_OSD_OP_SETXATTR:
1034 case CEPH_OSD_OP_CMPXATTR:
1035 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1036 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1037 dst->xattr.cmp_op = src->xattr.cmp_op;
1038 dst->xattr.cmp_mode = src->xattr.cmp_mode;
1039 break;
1040 case CEPH_OSD_OP_CREATE:
1041 case CEPH_OSD_OP_DELETE:
1042 break;
1043 case CEPH_OSD_OP_COPY_FROM2:
1044 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1045 dst->copy_from.src_version =
1046 cpu_to_le64(src->copy_from.src_version);
1047 dst->copy_from.flags = src->copy_from.flags;
1048 dst->copy_from.src_fadvise_flags =
1049 cpu_to_le32(src->copy_from.src_fadvise_flags);
1050 break;
1051 case CEPH_OSD_OP_ASSERT_VER:
1052 dst->assert_ver.unused = cpu_to_le64(0);
1053 dst->assert_ver.ver = cpu_to_le64(src->assert_ver.ver);
1054 break;
1055 default:
1056 pr_err("unsupported osd opcode %s\n",
1057 ceph_osd_op_name(src->op));
1058 WARN_ON(1);
1059
1060 return 0;
1061 }
1062
1063 dst->op = cpu_to_le16(src->op);
1064 dst->flags = cpu_to_le32(src->flags);
1065 dst->payload_len = cpu_to_le32(src->indata_len);
1066
1067 return src->indata_len;
1068 }
1069
1070 /*
1071 * build new request AND message, calculate layout, and adjust file
1072 * extent as needed.
1073 *
1074 * if the file was recently truncated, we include information about its
1075 * old and new size so that the object can be updated appropriately. (we
1076 * avoid synchronously deleting truncated objects because it's slow.)
1077 */
1078 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1079 struct ceph_file_layout *layout,
1080 struct ceph_vino vino,
1081 u64 off, u64 *plen,
1082 unsigned int which, int num_ops,
1083 int opcode, int flags,
1084 struct ceph_snap_context *snapc,
1085 u32 truncate_seq,
1086 u64 truncate_size,
1087 bool use_mempool)
1088 {
1089 struct ceph_osd_request *req;
1090 u64 objnum = 0;
1091 u64 objoff = 0;
1092 u64 objlen = 0;
1093 int r;
1094
1095 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
1096 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1097 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE &&
1098 opcode != CEPH_OSD_OP_SPARSE_READ);
1099
1100 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
1101 GFP_NOFS);
1102 if (!req) {
1103 r = -ENOMEM;
1104 goto fail;
1105 }
1106
1107 /* calculate max write size */
1108 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
1109 if (r)
1110 goto fail;
1111
1112 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
1113 osd_req_op_init(req, which, opcode, 0);
1114 } else {
1115 u32 object_size = layout->object_size;
1116 u32 object_base = off - objoff;
1117 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1118 if (truncate_size <= object_base) {
1119 truncate_size = 0;
1120 } else {
1121 truncate_size -= object_base;
1122 if (truncate_size > object_size)
1123 truncate_size = object_size;
1124 }
1125 }
1126 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1127 truncate_size, truncate_seq);
1128 }
1129
1130 req->r_base_oloc.pool = layout->pool_id;
1131 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1132 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1133 req->r_flags = flags | osdc->client->options->read_from_replica;
1134
1135 req->r_snapid = vino.snap;
1136 if (flags & CEPH_OSD_FLAG_WRITE)
1137 req->r_data_offset = off;
1138
1139 if (num_ops > 1) {
1140 int num_req_ops, num_rep_ops;
1141
1142 /*
1143 * If this is a multi-op write request, assume that we'll need
1144 * request ops. If it's a multi-op read then assume we'll need
1145 * reply ops. Anything else and call it -EINVAL.
1146 */
1147 if (flags & CEPH_OSD_FLAG_WRITE) {
1148 num_req_ops = num_ops;
1149 num_rep_ops = 0;
1150 } else if (flags & CEPH_OSD_FLAG_READ) {
1151 num_req_ops = 0;
1152 num_rep_ops = num_ops;
1153 } else {
1154 r = -EINVAL;
1155 goto fail;
1156 }
1157
1158 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_req_ops,
1159 num_rep_ops);
1160 } else {
1161 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
1162 }
1163 if (r)
1164 goto fail;
1165
1166 return req;
1167
1168 fail:
1169 ceph_osdc_put_request(req);
1170 return ERR_PTR(r);
1171 }
1172 EXPORT_SYMBOL(ceph_osdc_new_request);
1173
1174 int __ceph_alloc_sparse_ext_map(struct ceph_osd_req_op *op, int cnt)
1175 {
1176 op->extent.sparse_ext_cnt = cnt;
1177 op->extent.sparse_ext = kmalloc_array(cnt,
1178 sizeof(*op->extent.sparse_ext),
1179 GFP_NOFS);
1180 if (!op->extent.sparse_ext)
1181 return -ENOMEM;
1182 return 0;
1183 }
1184 EXPORT_SYMBOL(__ceph_alloc_sparse_ext_map);
1185
1186 /*
1187 * We keep osd requests in an rbtree, sorted by ->r_tid.
1188 */
1189 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
1190 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
1191
1192 /*
1193 * Call @fn on each OSD request as long as @fn returns 0.
1194 */
1195 static void for_each_request(struct ceph_osd_client *osdc,
1196 int (*fn)(struct ceph_osd_request *req, void *arg),
1197 void *arg)
1198 {
1199 struct rb_node *n, *p;
1200
1201 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1202 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1203
1204 for (p = rb_first(&osd->o_requests); p; ) {
1205 struct ceph_osd_request *req =
1206 rb_entry(p, struct ceph_osd_request, r_node);
1207
1208 p = rb_next(p);
1209 if (fn(req, arg))
1210 return;
1211 }
1212 }
1213
1214 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1215 struct ceph_osd_request *req =
1216 rb_entry(p, struct ceph_osd_request, r_node);
1217
1218 p = rb_next(p);
1219 if (fn(req, arg))
1220 return;
1221 }
1222 }
1223
1224 static bool osd_homeless(struct ceph_osd *osd)
1225 {
1226 return osd->o_osd == CEPH_HOMELESS_OSD;
1227 }
1228
1229 static bool osd_registered(struct ceph_osd *osd)
1230 {
1231 verify_osdc_locked(osd->o_osdc);
1232
1233 return !RB_EMPTY_NODE(&osd->o_node);
1234 }
1235
1236 /*
1237 * Assumes @osd is zero-initialized.
1238 */
1239 static void osd_init(struct ceph_osd *osd)
1240 {
1241 refcount_set(&osd->o_ref, 1);
1242 RB_CLEAR_NODE(&osd->o_node);
1243 spin_lock_init(&osd->o_requests_lock);
1244 osd->o_requests = RB_ROOT;
1245 osd->o_linger_requests = RB_ROOT;
1246 osd->o_backoff_mappings = RB_ROOT;
1247 osd->o_backoffs_by_id = RB_ROOT;
1248 INIT_LIST_HEAD(&osd->o_osd_lru);
1249 INIT_LIST_HEAD(&osd->o_keepalive_item);
1250 osd->o_incarnation = 1;
1251 mutex_init(&osd->lock);
1252 }
1253
1254 static void ceph_init_sparse_read(struct ceph_sparse_read *sr)
1255 {
1256 kfree(sr->sr_extent);
1257 memset(sr, '\0', sizeof(*sr));
1258 sr->sr_state = CEPH_SPARSE_READ_HDR;
1259 }
1260
1261 static void osd_cleanup(struct ceph_osd *osd)
1262 {
1263 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1264 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1265 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1266 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1267 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1268 WARN_ON(!list_empty(&osd->o_osd_lru));
1269 WARN_ON(!list_empty(&osd->o_keepalive_item));
1270
1271 ceph_init_sparse_read(&osd->o_sparse_read);
1272
1273 if (osd->o_auth.authorizer) {
1274 WARN_ON(osd_homeless(osd));
1275 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1276 }
1277 }
1278
1279 /*
1280 * Track open sessions with osds.
1281 */
1282 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1283 {
1284 struct ceph_osd *osd;
1285
1286 WARN_ON(onum == CEPH_HOMELESS_OSD);
1287
1288 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1289 osd_init(osd);
1290 osd->o_osdc = osdc;
1291 osd->o_osd = onum;
1292 osd->o_sparse_op_idx = -1;
1293
1294 ceph_init_sparse_read(&osd->o_sparse_read);
1295
1296 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1297
1298 return osd;
1299 }
1300
1301 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1302 {
1303 if (refcount_inc_not_zero(&osd->o_ref)) {
1304 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1305 refcount_read(&osd->o_ref));
1306 return osd;
1307 } else {
1308 dout("get_osd %p FAIL\n", osd);
1309 return NULL;
1310 }
1311 }
1312
1313 static void put_osd(struct ceph_osd *osd)
1314 {
1315 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1316 refcount_read(&osd->o_ref) - 1);
1317 if (refcount_dec_and_test(&osd->o_ref)) {
1318 osd_cleanup(osd);
1319 kfree(osd);
1320 }
1321 }
1322
1323 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1324
1325 static void __move_osd_to_lru(struct ceph_osd *osd)
1326 {
1327 struct ceph_osd_client *osdc = osd->o_osdc;
1328
1329 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1330 BUG_ON(!list_empty(&osd->o_osd_lru));
1331
1332 spin_lock(&osdc->osd_lru_lock);
1333 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1334 spin_unlock(&osdc->osd_lru_lock);
1335
1336 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1337 }
1338
1339 static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1340 {
1341 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1342 RB_EMPTY_ROOT(&osd->o_linger_requests))
1343 __move_osd_to_lru(osd);
1344 }
1345
1346 static void __remove_osd_from_lru(struct ceph_osd *osd)
1347 {
1348 struct ceph_osd_client *osdc = osd->o_osdc;
1349
1350 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1351
1352 spin_lock(&osdc->osd_lru_lock);
1353 if (!list_empty(&osd->o_osd_lru))
1354 list_del_init(&osd->o_osd_lru);
1355 spin_unlock(&osdc->osd_lru_lock);
1356 }
1357
1358 /*
1359 * Close the connection and assign any leftover requests to the
1360 * homeless session.
1361 */
1362 static void close_osd(struct ceph_osd *osd)
1363 {
1364 struct ceph_osd_client *osdc = osd->o_osdc;
1365 struct rb_node *n;
1366
1367 verify_osdc_wrlocked(osdc);
1368 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1369
1370 ceph_con_close(&osd->o_con);
1371
1372 for (n = rb_first(&osd->o_requests); n; ) {
1373 struct ceph_osd_request *req =
1374 rb_entry(n, struct ceph_osd_request, r_node);
1375
1376 n = rb_next(n); /* unlink_request() */
1377
1378 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1379 unlink_request(osd, req);
1380 link_request(&osdc->homeless_osd, req);
1381 }
1382 for (n = rb_first(&osd->o_linger_requests); n; ) {
1383 struct ceph_osd_linger_request *lreq =
1384 rb_entry(n, struct ceph_osd_linger_request, node);
1385
1386 n = rb_next(n); /* unlink_linger() */
1387
1388 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1389 lreq->linger_id);
1390 unlink_linger(osd, lreq);
1391 link_linger(&osdc->homeless_osd, lreq);
1392 }
1393 clear_backoffs(osd);
1394
1395 __remove_osd_from_lru(osd);
1396 erase_osd(&osdc->osds, osd);
1397 put_osd(osd);
1398 }
1399
1400 /*
1401 * reset osd connect
1402 */
1403 static int reopen_osd(struct ceph_osd *osd)
1404 {
1405 struct ceph_entity_addr *peer_addr;
1406
1407 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1408
1409 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1410 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1411 close_osd(osd);
1412 return -ENODEV;
1413 }
1414
1415 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1416 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1417 !ceph_con_opened(&osd->o_con)) {
1418 struct rb_node *n;
1419
1420 dout("osd addr hasn't changed and connection never opened, "
1421 "letting msgr retry\n");
1422 /* touch each r_stamp for handle_timeout()'s benfit */
1423 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1424 struct ceph_osd_request *req =
1425 rb_entry(n, struct ceph_osd_request, r_node);
1426 req->r_stamp = jiffies;
1427 }
1428
1429 return -EAGAIN;
1430 }
1431
1432 ceph_con_close(&osd->o_con);
1433 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1434 osd->o_incarnation++;
1435
1436 return 0;
1437 }
1438
1439 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1440 bool wrlocked)
1441 {
1442 struct ceph_osd *osd;
1443
1444 if (wrlocked)
1445 verify_osdc_wrlocked(osdc);
1446 else
1447 verify_osdc_locked(osdc);
1448
1449 if (o != CEPH_HOMELESS_OSD)
1450 osd = lookup_osd(&osdc->osds, o);
1451 else
1452 osd = &osdc->homeless_osd;
1453 if (!osd) {
1454 if (!wrlocked)
1455 return ERR_PTR(-EAGAIN);
1456
1457 osd = create_osd(osdc, o);
1458 insert_osd(&osdc->osds, osd);
1459 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1460 &osdc->osdmap->osd_addr[osd->o_osd]);
1461 }
1462
1463 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1464 return osd;
1465 }
1466
1467 /*
1468 * Create request <-> OSD session relation.
1469 *
1470 * @req has to be assigned a tid, @osd may be homeless.
1471 */
1472 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1473 {
1474 verify_osd_locked(osd);
1475 WARN_ON(!req->r_tid || req->r_osd);
1476 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1477 req, req->r_tid);
1478
1479 if (!osd_homeless(osd))
1480 __remove_osd_from_lru(osd);
1481 else
1482 atomic_inc(&osd->o_osdc->num_homeless);
1483
1484 get_osd(osd);
1485 spin_lock(&osd->o_requests_lock);
1486 insert_request(&osd->o_requests, req);
1487 spin_unlock(&osd->o_requests_lock);
1488 req->r_osd = osd;
1489 }
1490
1491 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1492 {
1493 verify_osd_locked(osd);
1494 WARN_ON(req->r_osd != osd);
1495 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1496 req, req->r_tid);
1497
1498 req->r_osd = NULL;
1499 spin_lock(&osd->o_requests_lock);
1500 erase_request(&osd->o_requests, req);
1501 spin_unlock(&osd->o_requests_lock);
1502 put_osd(osd);
1503
1504 if (!osd_homeless(osd))
1505 maybe_move_osd_to_lru(osd);
1506 else
1507 atomic_dec(&osd->o_osdc->num_homeless);
1508 }
1509
1510 static bool __pool_full(struct ceph_pg_pool_info *pi)
1511 {
1512 return pi->flags & CEPH_POOL_FLAG_FULL;
1513 }
1514
1515 static bool have_pool_full(struct ceph_osd_client *osdc)
1516 {
1517 struct rb_node *n;
1518
1519 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1520 struct ceph_pg_pool_info *pi =
1521 rb_entry(n, struct ceph_pg_pool_info, node);
1522
1523 if (__pool_full(pi))
1524 return true;
1525 }
1526
1527 return false;
1528 }
1529
1530 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1531 {
1532 struct ceph_pg_pool_info *pi;
1533
1534 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1535 if (!pi)
1536 return false;
1537
1538 return __pool_full(pi);
1539 }
1540
1541 /*
1542 * Returns whether a request should be blocked from being sent
1543 * based on the current osdmap and osd_client settings.
1544 */
1545 static bool target_should_be_paused(struct ceph_osd_client *osdc,
1546 const struct ceph_osd_request_target *t,
1547 struct ceph_pg_pool_info *pi)
1548 {
1549 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1550 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1551 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1552 __pool_full(pi);
1553
1554 WARN_ON(pi->id != t->target_oloc.pool);
1555 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1556 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1557 (osdc->osdmap->epoch < osdc->epoch_barrier);
1558 }
1559
1560 static int pick_random_replica(const struct ceph_osds *acting)
1561 {
1562 int i = get_random_u32_below(acting->size);
1563
1564 dout("%s picked osd%d, primary osd%d\n", __func__,
1565 acting->osds[i], acting->primary);
1566 return i;
1567 }
1568
1569 /*
1570 * Picks the closest replica based on client's location given by
1571 * crush_location option. Prefers the primary if the locality is
1572 * the same.
1573 */
1574 static int pick_closest_replica(struct ceph_osd_client *osdc,
1575 const struct ceph_osds *acting)
1576 {
1577 struct ceph_options *opt = osdc->client->options;
1578 int best_i, best_locality;
1579 int i = 0, locality;
1580
1581 do {
1582 locality = ceph_get_crush_locality(osdc->osdmap,
1583 acting->osds[i],
1584 &opt->crush_locs);
1585 if (i == 0 ||
1586 (locality >= 0 && best_locality < 0) ||
1587 (locality >= 0 && best_locality >= 0 &&
1588 locality < best_locality)) {
1589 best_i = i;
1590 best_locality = locality;
1591 }
1592 } while (++i < acting->size);
1593
1594 dout("%s picked osd%d with locality %d, primary osd%d\n", __func__,
1595 acting->osds[best_i], best_locality, acting->primary);
1596 return best_i;
1597 }
1598
1599 enum calc_target_result {
1600 CALC_TARGET_NO_ACTION = 0,
1601 CALC_TARGET_NEED_RESEND,
1602 CALC_TARGET_POOL_DNE,
1603 };
1604
1605 static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1606 struct ceph_osd_request_target *t,
1607 bool any_change)
1608 {
1609 struct ceph_pg_pool_info *pi;
1610 struct ceph_pg pgid, last_pgid;
1611 struct ceph_osds up, acting;
1612 bool is_read = t->flags & CEPH_OSD_FLAG_READ;
1613 bool is_write = t->flags & CEPH_OSD_FLAG_WRITE;
1614 bool force_resend = false;
1615 bool unpaused = false;
1616 bool legacy_change = false;
1617 bool split = false;
1618 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1619 bool recovery_deletes = ceph_osdmap_flag(osdc,
1620 CEPH_OSDMAP_RECOVERY_DELETES);
1621 enum calc_target_result ct_res;
1622
1623 t->epoch = osdc->osdmap->epoch;
1624 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1625 if (!pi) {
1626 t->osd = CEPH_HOMELESS_OSD;
1627 ct_res = CALC_TARGET_POOL_DNE;
1628 goto out;
1629 }
1630
1631 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1632 if (t->last_force_resend < pi->last_force_request_resend) {
1633 t->last_force_resend = pi->last_force_request_resend;
1634 force_resend = true;
1635 } else if (t->last_force_resend == 0) {
1636 force_resend = true;
1637 }
1638 }
1639
1640 /* apply tiering */
1641 ceph_oid_copy(&t->target_oid, &t->base_oid);
1642 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1643 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1644 if (is_read && pi->read_tier >= 0)
1645 t->target_oloc.pool = pi->read_tier;
1646 if (is_write && pi->write_tier >= 0)
1647 t->target_oloc.pool = pi->write_tier;
1648
1649 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1650 if (!pi) {
1651 t->osd = CEPH_HOMELESS_OSD;
1652 ct_res = CALC_TARGET_POOL_DNE;
1653 goto out;
1654 }
1655 }
1656
1657 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
1658 last_pgid.pool = pgid.pool;
1659 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1660
1661 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1662 if (any_change &&
1663 ceph_is_new_interval(&t->acting,
1664 &acting,
1665 &t->up,
1666 &up,
1667 t->size,
1668 pi->size,
1669 t->min_size,
1670 pi->min_size,
1671 t->pg_num,
1672 pi->pg_num,
1673 t->sort_bitwise,
1674 sort_bitwise,
1675 t->recovery_deletes,
1676 recovery_deletes,
1677 &last_pgid))
1678 force_resend = true;
1679
1680 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1681 t->paused = false;
1682 unpaused = true;
1683 }
1684 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1685 ceph_osds_changed(&t->acting, &acting,
1686 t->used_replica || any_change);
1687 if (t->pg_num)
1688 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1689
1690 if (legacy_change || force_resend || split) {
1691 t->pgid = pgid; /* struct */
1692 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1693 ceph_osds_copy(&t->acting, &acting);
1694 ceph_osds_copy(&t->up, &up);
1695 t->size = pi->size;
1696 t->min_size = pi->min_size;
1697 t->pg_num = pi->pg_num;
1698 t->pg_num_mask = pi->pg_num_mask;
1699 t->sort_bitwise = sort_bitwise;
1700 t->recovery_deletes = recovery_deletes;
1701
1702 if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS |
1703 CEPH_OSD_FLAG_LOCALIZE_READS)) &&
1704 !is_write && pi->type == CEPH_POOL_TYPE_REP &&
1705 acting.size > 1) {
1706 int pos;
1707
1708 WARN_ON(!is_read || acting.osds[0] != acting.primary);
1709 if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) {
1710 pos = pick_random_replica(&acting);
1711 } else {
1712 pos = pick_closest_replica(osdc, &acting);
1713 }
1714 t->osd = acting.osds[pos];
1715 t->used_replica = pos > 0;
1716 } else {
1717 t->osd = acting.primary;
1718 t->used_replica = false;
1719 }
1720 }
1721
1722 if (unpaused || legacy_change || force_resend || split)
1723 ct_res = CALC_TARGET_NEED_RESEND;
1724 else
1725 ct_res = CALC_TARGET_NO_ACTION;
1726
1727 out:
1728 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1729 legacy_change, force_resend, split, ct_res, t->osd);
1730 return ct_res;
1731 }
1732
1733 static struct ceph_spg_mapping *alloc_spg_mapping(void)
1734 {
1735 struct ceph_spg_mapping *spg;
1736
1737 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1738 if (!spg)
1739 return NULL;
1740
1741 RB_CLEAR_NODE(&spg->node);
1742 spg->backoffs = RB_ROOT;
1743 return spg;
1744 }
1745
1746 static void free_spg_mapping(struct ceph_spg_mapping *spg)
1747 {
1748 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1749 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1750
1751 kfree(spg);
1752 }
1753
1754 /*
1755 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1756 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1757 * defined only within a specific spgid; it does not pass anything to
1758 * children on split, or to another primary.
1759 */
1760 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1761 RB_BYPTR, const struct ceph_spg *, node)
1762
1763 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1764 {
1765 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1766 }
1767
1768 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1769 void **pkey, size_t *pkey_len)
1770 {
1771 if (hoid->key_len) {
1772 *pkey = hoid->key;
1773 *pkey_len = hoid->key_len;
1774 } else {
1775 *pkey = hoid->oid;
1776 *pkey_len = hoid->oid_len;
1777 }
1778 }
1779
1780 static int compare_names(const void *name1, size_t name1_len,
1781 const void *name2, size_t name2_len)
1782 {
1783 int ret;
1784
1785 ret = memcmp(name1, name2, min(name1_len, name2_len));
1786 if (!ret) {
1787 if (name1_len < name2_len)
1788 ret = -1;
1789 else if (name1_len > name2_len)
1790 ret = 1;
1791 }
1792 return ret;
1793 }
1794
1795 static int hoid_compare(const struct ceph_hobject_id *lhs,
1796 const struct ceph_hobject_id *rhs)
1797 {
1798 void *effective_key1, *effective_key2;
1799 size_t effective_key1_len, effective_key2_len;
1800 int ret;
1801
1802 if (lhs->is_max < rhs->is_max)
1803 return -1;
1804 if (lhs->is_max > rhs->is_max)
1805 return 1;
1806
1807 if (lhs->pool < rhs->pool)
1808 return -1;
1809 if (lhs->pool > rhs->pool)
1810 return 1;
1811
1812 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1813 return -1;
1814 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1815 return 1;
1816
1817 ret = compare_names(lhs->nspace, lhs->nspace_len,
1818 rhs->nspace, rhs->nspace_len);
1819 if (ret)
1820 return ret;
1821
1822 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1823 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1824 ret = compare_names(effective_key1, effective_key1_len,
1825 effective_key2, effective_key2_len);
1826 if (ret)
1827 return ret;
1828
1829 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1830 if (ret)
1831 return ret;
1832
1833 if (lhs->snapid < rhs->snapid)
1834 return -1;
1835 if (lhs->snapid > rhs->snapid)
1836 return 1;
1837
1838 return 0;
1839 }
1840
1841 /*
1842 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1843 * compat stuff here.
1844 *
1845 * Assumes @hoid is zero-initialized.
1846 */
1847 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1848 {
1849 u8 struct_v;
1850 u32 struct_len;
1851 int ret;
1852
1853 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1854 &struct_len);
1855 if (ret)
1856 return ret;
1857
1858 if (struct_v < 4) {
1859 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1860 goto e_inval;
1861 }
1862
1863 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1864 GFP_NOIO);
1865 if (IS_ERR(hoid->key)) {
1866 ret = PTR_ERR(hoid->key);
1867 hoid->key = NULL;
1868 return ret;
1869 }
1870
1871 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1872 GFP_NOIO);
1873 if (IS_ERR(hoid->oid)) {
1874 ret = PTR_ERR(hoid->oid);
1875 hoid->oid = NULL;
1876 return ret;
1877 }
1878
1879 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1880 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1881 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1882
1883 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1884 GFP_NOIO);
1885 if (IS_ERR(hoid->nspace)) {
1886 ret = PTR_ERR(hoid->nspace);
1887 hoid->nspace = NULL;
1888 return ret;
1889 }
1890
1891 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1892
1893 ceph_hoid_build_hash_cache(hoid);
1894 return 0;
1895
1896 e_inval:
1897 return -EINVAL;
1898 }
1899
1900 static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1901 {
1902 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1903 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1904 }
1905
1906 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1907 {
1908 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1909 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1910 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1911 ceph_encode_64(p, hoid->snapid);
1912 ceph_encode_32(p, hoid->hash);
1913 ceph_encode_8(p, hoid->is_max);
1914 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1915 ceph_encode_64(p, hoid->pool);
1916 }
1917
1918 static void free_hoid(struct ceph_hobject_id *hoid)
1919 {
1920 if (hoid) {
1921 kfree(hoid->key);
1922 kfree(hoid->oid);
1923 kfree(hoid->nspace);
1924 kfree(hoid);
1925 }
1926 }
1927
1928 static struct ceph_osd_backoff *alloc_backoff(void)
1929 {
1930 struct ceph_osd_backoff *backoff;
1931
1932 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1933 if (!backoff)
1934 return NULL;
1935
1936 RB_CLEAR_NODE(&backoff->spg_node);
1937 RB_CLEAR_NODE(&backoff->id_node);
1938 return backoff;
1939 }
1940
1941 static void free_backoff(struct ceph_osd_backoff *backoff)
1942 {
1943 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1944 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1945
1946 free_hoid(backoff->begin);
1947 free_hoid(backoff->end);
1948 kfree(backoff);
1949 }
1950
1951 /*
1952 * Within a specific spgid, backoffs are managed by ->begin hoid.
1953 */
1954 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1955 RB_BYVAL, spg_node);
1956
1957 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1958 const struct ceph_hobject_id *hoid)
1959 {
1960 struct rb_node *n = root->rb_node;
1961
1962 while (n) {
1963 struct ceph_osd_backoff *cur =
1964 rb_entry(n, struct ceph_osd_backoff, spg_node);
1965 int cmp;
1966
1967 cmp = hoid_compare(hoid, cur->begin);
1968 if (cmp < 0) {
1969 n = n->rb_left;
1970 } else if (cmp > 0) {
1971 if (hoid_compare(hoid, cur->end) < 0)
1972 return cur;
1973
1974 n = n->rb_right;
1975 } else {
1976 return cur;
1977 }
1978 }
1979
1980 return NULL;
1981 }
1982
1983 /*
1984 * Each backoff has a unique id within its OSD session.
1985 */
1986 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1987
1988 static void clear_backoffs(struct ceph_osd *osd)
1989 {
1990 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1991 struct ceph_spg_mapping *spg =
1992 rb_entry(rb_first(&osd->o_backoff_mappings),
1993 struct ceph_spg_mapping, node);
1994
1995 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1996 struct ceph_osd_backoff *backoff =
1997 rb_entry(rb_first(&spg->backoffs),
1998 struct ceph_osd_backoff, spg_node);
1999
2000 erase_backoff(&spg->backoffs, backoff);
2001 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
2002 free_backoff(backoff);
2003 }
2004 erase_spg_mapping(&osd->o_backoff_mappings, spg);
2005 free_spg_mapping(spg);
2006 }
2007 }
2008
2009 /*
2010 * Set up a temporary, non-owning view into @t.
2011 */
2012 static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
2013 const struct ceph_osd_request_target *t)
2014 {
2015 hoid->key = NULL;
2016 hoid->key_len = 0;
2017 hoid->oid = t->target_oid.name;
2018 hoid->oid_len = t->target_oid.name_len;
2019 hoid->snapid = CEPH_NOSNAP;
2020 hoid->hash = t->pgid.seed;
2021 hoid->is_max = false;
2022 if (t->target_oloc.pool_ns) {
2023 hoid->nspace = t->target_oloc.pool_ns->str;
2024 hoid->nspace_len = t->target_oloc.pool_ns->len;
2025 } else {
2026 hoid->nspace = NULL;
2027 hoid->nspace_len = 0;
2028 }
2029 hoid->pool = t->target_oloc.pool;
2030 ceph_hoid_build_hash_cache(hoid);
2031 }
2032
2033 static bool should_plug_request(struct ceph_osd_request *req)
2034 {
2035 struct ceph_osd *osd = req->r_osd;
2036 struct ceph_spg_mapping *spg;
2037 struct ceph_osd_backoff *backoff;
2038 struct ceph_hobject_id hoid;
2039
2040 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
2041 if (!spg)
2042 return false;
2043
2044 hoid_fill_from_target(&hoid, &req->r_t);
2045 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
2046 if (!backoff)
2047 return false;
2048
2049 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
2050 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
2051 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
2052 return true;
2053 }
2054
2055 /*
2056 * Keep get_num_data_items() in sync with this function.
2057 */
2058 static void setup_request_data(struct ceph_osd_request *req)
2059 {
2060 struct ceph_msg *request_msg = req->r_request;
2061 struct ceph_msg *reply_msg = req->r_reply;
2062 struct ceph_osd_req_op *op;
2063
2064 if (req->r_request->num_data_items || req->r_reply->num_data_items)
2065 return;
2066
2067 WARN_ON(request_msg->data_length || reply_msg->data_length);
2068 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
2069 switch (op->op) {
2070 /* request */
2071 case CEPH_OSD_OP_WRITE:
2072 case CEPH_OSD_OP_WRITEFULL:
2073 WARN_ON(op->indata_len != op->extent.length);
2074 ceph_osdc_msg_data_add(request_msg,
2075 &op->extent.osd_data);
2076 break;
2077 case CEPH_OSD_OP_SETXATTR:
2078 case CEPH_OSD_OP_CMPXATTR:
2079 WARN_ON(op->indata_len != op->xattr.name_len +
2080 op->xattr.value_len);
2081 ceph_osdc_msg_data_add(request_msg,
2082 &op->xattr.osd_data);
2083 break;
2084 case CEPH_OSD_OP_NOTIFY_ACK:
2085 ceph_osdc_msg_data_add(request_msg,
2086 &op->notify_ack.request_data);
2087 break;
2088 case CEPH_OSD_OP_COPY_FROM2:
2089 ceph_osdc_msg_data_add(request_msg,
2090 &op->copy_from.osd_data);
2091 break;
2092
2093 /* reply */
2094 case CEPH_OSD_OP_STAT:
2095 ceph_osdc_msg_data_add(reply_msg,
2096 &op->raw_data_in);
2097 break;
2098 case CEPH_OSD_OP_READ:
2099 case CEPH_OSD_OP_SPARSE_READ:
2100 ceph_osdc_msg_data_add(reply_msg,
2101 &op->extent.osd_data);
2102 break;
2103 case CEPH_OSD_OP_LIST_WATCHERS:
2104 ceph_osdc_msg_data_add(reply_msg,
2105 &op->list_watchers.response_data);
2106 break;
2107
2108 /* both */
2109 case CEPH_OSD_OP_CALL:
2110 WARN_ON(op->indata_len != op->cls.class_len +
2111 op->cls.method_len +
2112 op->cls.indata_len);
2113 ceph_osdc_msg_data_add(request_msg,
2114 &op->cls.request_info);
2115 /* optional, can be NONE */
2116 ceph_osdc_msg_data_add(request_msg,
2117 &op->cls.request_data);
2118 /* optional, can be NONE */
2119 ceph_osdc_msg_data_add(reply_msg,
2120 &op->cls.response_data);
2121 break;
2122 case CEPH_OSD_OP_NOTIFY:
2123 ceph_osdc_msg_data_add(request_msg,
2124 &op->notify.request_data);
2125 ceph_osdc_msg_data_add(reply_msg,
2126 &op->notify.response_data);
2127 break;
2128 }
2129 }
2130 }
2131
2132 static void encode_pgid(void **p, const struct ceph_pg *pgid)
2133 {
2134 ceph_encode_8(p, 1);
2135 ceph_encode_64(p, pgid->pool);
2136 ceph_encode_32(p, pgid->seed);
2137 ceph_encode_32(p, -1); /* preferred */
2138 }
2139
2140 static void encode_spgid(void **p, const struct ceph_spg *spgid)
2141 {
2142 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2143 encode_pgid(p, &spgid->pgid);
2144 ceph_encode_8(p, spgid->shard);
2145 }
2146
2147 static void encode_oloc(void **p, void *end,
2148 const struct ceph_object_locator *oloc)
2149 {
2150 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2151 ceph_encode_64(p, oloc->pool);
2152 ceph_encode_32(p, -1); /* preferred */
2153 ceph_encode_32(p, 0); /* key len */
2154 if (oloc->pool_ns)
2155 ceph_encode_string(p, end, oloc->pool_ns->str,
2156 oloc->pool_ns->len);
2157 else
2158 ceph_encode_32(p, 0);
2159 }
2160
2161 static void encode_request_partial(struct ceph_osd_request *req,
2162 struct ceph_msg *msg)
2163 {
2164 void *p = msg->front.iov_base;
2165 void *const end = p + msg->front_alloc_len;
2166 u32 data_len = 0;
2167 int i;
2168
2169 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2170 /* snapshots aren't writeable */
2171 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2172 } else {
2173 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2174 req->r_data_offset || req->r_snapc);
2175 }
2176
2177 setup_request_data(req);
2178
2179 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2180 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
2181 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2182 ceph_encode_32(&p, req->r_flags);
2183
2184 /* reqid */
2185 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2186 memset(p, 0, sizeof(struct ceph_osd_reqid));
2187 p += sizeof(struct ceph_osd_reqid);
2188
2189 /* trace */
2190 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2191 p += sizeof(struct ceph_blkin_trace_info);
2192
2193 ceph_encode_32(&p, 0); /* client_inc, always 0 */
2194 ceph_encode_timespec64(p, &req->r_mtime);
2195 p += sizeof(struct ceph_timespec);
2196
2197 encode_oloc(&p, end, &req->r_t.target_oloc);
2198 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2199 req->r_t.target_oid.name_len);
2200
2201 /* ops, can imply data */
2202 ceph_encode_16(&p, req->r_num_ops);
2203 for (i = 0; i < req->r_num_ops; i++) {
2204 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2205 p += sizeof(struct ceph_osd_op);
2206 }
2207
2208 ceph_encode_64(&p, req->r_snapid); /* snapid */
2209 if (req->r_snapc) {
2210 ceph_encode_64(&p, req->r_snapc->seq);
2211 ceph_encode_32(&p, req->r_snapc->num_snaps);
2212 for (i = 0; i < req->r_snapc->num_snaps; i++)
2213 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2214 } else {
2215 ceph_encode_64(&p, 0); /* snap_seq */
2216 ceph_encode_32(&p, 0); /* snaps len */
2217 }
2218
2219 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
2220 BUG_ON(p > end - 8); /* space for features */
2221
2222 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2223 /* front_len is finalized in encode_request_finish() */
2224 msg->front.iov_len = p - msg->front.iov_base;
2225 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2226 msg->hdr.data_len = cpu_to_le32(data_len);
2227 /*
2228 * The header "data_off" is a hint to the receiver allowing it
2229 * to align received data into its buffers such that there's no
2230 * need to re-copy it before writing it to disk (direct I/O).
2231 */
2232 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
2233
2234 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2235 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2236 }
2237
2238 static void encode_request_finish(struct ceph_msg *msg)
2239 {
2240 void *p = msg->front.iov_base;
2241 void *const partial_end = p + msg->front.iov_len;
2242 void *const end = p + msg->front_alloc_len;
2243
2244 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2245 /* luminous OSD -- encode features and be done */
2246 p = partial_end;
2247 ceph_encode_64(&p, msg->con->peer_features);
2248 } else {
2249 struct {
2250 char spgid[CEPH_ENCODING_START_BLK_LEN +
2251 CEPH_PGID_ENCODING_LEN + 1];
2252 __le32 hash;
2253 __le32 epoch;
2254 __le32 flags;
2255 char reqid[CEPH_ENCODING_START_BLK_LEN +
2256 sizeof(struct ceph_osd_reqid)];
2257 char trace[sizeof(struct ceph_blkin_trace_info)];
2258 __le32 client_inc;
2259 struct ceph_timespec mtime;
2260 } __packed head;
2261 struct ceph_pg pgid;
2262 void *oloc, *oid, *tail;
2263 int oloc_len, oid_len, tail_len;
2264 int len;
2265
2266 /*
2267 * Pre-luminous OSD -- reencode v8 into v4 using @head
2268 * as a temporary buffer. Encode the raw PG; the rest
2269 * is just a matter of moving oloc, oid and tail blobs
2270 * around.
2271 */
2272 memcpy(&head, p, sizeof(head));
2273 p += sizeof(head);
2274
2275 oloc = p;
2276 p += CEPH_ENCODING_START_BLK_LEN;
2277 pgid.pool = ceph_decode_64(&p);
2278 p += 4 + 4; /* preferred, key len */
2279 len = ceph_decode_32(&p);
2280 p += len; /* nspace */
2281 oloc_len = p - oloc;
2282
2283 oid = p;
2284 len = ceph_decode_32(&p);
2285 p += len;
2286 oid_len = p - oid;
2287
2288 tail = p;
2289 tail_len = partial_end - p;
2290
2291 p = msg->front.iov_base;
2292 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2293 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2294 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2295 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2296
2297 /* reassert_version */
2298 memset(p, 0, sizeof(struct ceph_eversion));
2299 p += sizeof(struct ceph_eversion);
2300
2301 BUG_ON(p >= oloc);
2302 memmove(p, oloc, oloc_len);
2303 p += oloc_len;
2304
2305 pgid.seed = le32_to_cpu(head.hash);
2306 encode_pgid(&p, &pgid); /* raw pg */
2307
2308 BUG_ON(p >= oid);
2309 memmove(p, oid, oid_len);
2310 p += oid_len;
2311
2312 /* tail -- ops, snapid, snapc, retry_attempt */
2313 BUG_ON(p >= tail);
2314 memmove(p, tail, tail_len);
2315 p += tail_len;
2316
2317 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2318 }
2319
2320 BUG_ON(p > end);
2321 msg->front.iov_len = p - msg->front.iov_base;
2322 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2323
2324 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2325 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2326 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2327 le16_to_cpu(msg->hdr.version));
2328 }
2329
2330 /*
2331 * @req has to be assigned a tid and registered.
2332 */
2333 static void send_request(struct ceph_osd_request *req)
2334 {
2335 struct ceph_osd *osd = req->r_osd;
2336
2337 verify_osd_locked(osd);
2338 WARN_ON(osd->o_osd != req->r_t.osd);
2339
2340 /* backoff? */
2341 if (should_plug_request(req))
2342 return;
2343
2344 /*
2345 * We may have a previously queued request message hanging
2346 * around. Cancel it to avoid corrupting the msgr.
2347 */
2348 if (req->r_sent)
2349 ceph_msg_revoke(req->r_request);
2350
2351 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2352 if (req->r_attempts)
2353 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2354 else
2355 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2356
2357 encode_request_partial(req, req->r_request);
2358
2359 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2360 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2361 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2362 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2363 req->r_attempts);
2364
2365 req->r_t.paused = false;
2366 req->r_stamp = jiffies;
2367 req->r_attempts++;
2368
2369 req->r_sent = osd->o_incarnation;
2370 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2371 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
2372 }
2373
2374 static void maybe_request_map(struct ceph_osd_client *osdc)
2375 {
2376 bool continuous = false;
2377
2378 verify_osdc_locked(osdc);
2379 WARN_ON(!osdc->osdmap->epoch);
2380
2381 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2382 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2383 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2384 dout("%s osdc %p continuous\n", __func__, osdc);
2385 continuous = true;
2386 } else {
2387 dout("%s osdc %p onetime\n", __func__, osdc);
2388 }
2389
2390 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2391 osdc->osdmap->epoch + 1, continuous))
2392 ceph_monc_renew_subs(&osdc->client->monc);
2393 }
2394
2395 static void complete_request(struct ceph_osd_request *req, int err);
2396 static void send_map_check(struct ceph_osd_request *req);
2397
2398 static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2399 {
2400 struct ceph_osd_client *osdc = req->r_osdc;
2401 struct ceph_osd *osd;
2402 enum calc_target_result ct_res;
2403 int err = 0;
2404 bool need_send = false;
2405 bool promoted = false;
2406
2407 WARN_ON(req->r_tid);
2408 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2409
2410 again:
2411 ct_res = calc_target(osdc, &req->r_t, false);
2412 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2413 goto promote;
2414
2415 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2416 if (IS_ERR(osd)) {
2417 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2418 goto promote;
2419 }
2420
2421 if (osdc->abort_err) {
2422 dout("req %p abort_err %d\n", req, osdc->abort_err);
2423 err = osdc->abort_err;
2424 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2425 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2426 osdc->epoch_barrier);
2427 req->r_t.paused = true;
2428 maybe_request_map(osdc);
2429 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2430 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2431 dout("req %p pausewr\n", req);
2432 req->r_t.paused = true;
2433 maybe_request_map(osdc);
2434 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2435 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2436 dout("req %p pauserd\n", req);
2437 req->r_t.paused = true;
2438 maybe_request_map(osdc);
2439 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2440 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2441 CEPH_OSD_FLAG_FULL_FORCE)) &&
2442 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2443 pool_full(osdc, req->r_t.base_oloc.pool))) {
2444 dout("req %p full/pool_full\n", req);
2445 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
2446 err = -ENOSPC;
2447 } else {
2448 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL))
2449 pr_warn_ratelimited("cluster is full (osdmap FULL)\n");
2450 else
2451 pr_warn_ratelimited("pool %lld is full or reached quota\n",
2452 req->r_t.base_oloc.pool);
2453 req->r_t.paused = true;
2454 maybe_request_map(osdc);
2455 }
2456 } else if (!osd_homeless(osd)) {
2457 need_send = true;
2458 } else {
2459 maybe_request_map(osdc);
2460 }
2461
2462 mutex_lock(&osd->lock);
2463 /*
2464 * Assign the tid atomically with send_request() to protect
2465 * multiple writes to the same object from racing with each
2466 * other, resulting in out of order ops on the OSDs.
2467 */
2468 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2469 link_request(osd, req);
2470 if (need_send)
2471 send_request(req);
2472 else if (err)
2473 complete_request(req, err);
2474 mutex_unlock(&osd->lock);
2475
2476 if (!err && ct_res == CALC_TARGET_POOL_DNE)
2477 send_map_check(req);
2478
2479 if (promoted)
2480 downgrade_write(&osdc->lock);
2481 return;
2482
2483 promote:
2484 up_read(&osdc->lock);
2485 down_write(&osdc->lock);
2486 wrlocked = true;
2487 promoted = true;
2488 goto again;
2489 }
2490
2491 static void account_request(struct ceph_osd_request *req)
2492 {
2493 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
2494 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2495
2496 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2497 atomic_inc(&req->r_osdc->num_requests);
2498
2499 req->r_start_stamp = jiffies;
2500 req->r_start_latency = ktime_get();
2501 }
2502
2503 static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2504 {
2505 ceph_osdc_get_request(req);
2506 account_request(req);
2507 __submit_request(req, wrlocked);
2508 }
2509
2510 static void finish_request(struct ceph_osd_request *req)
2511 {
2512 struct ceph_osd_client *osdc = req->r_osdc;
2513
2514 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2515 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2516
2517 req->r_end_latency = ktime_get();
2518
2519 if (req->r_osd) {
2520 ceph_init_sparse_read(&req->r_osd->o_sparse_read);
2521 unlink_request(req->r_osd, req);
2522 }
2523 atomic_dec(&osdc->num_requests);
2524
2525 /*
2526 * If an OSD has failed or returned and a request has been sent
2527 * twice, it's possible to get a reply and end up here while the
2528 * request message is queued for delivery. We will ignore the
2529 * reply, so not a big deal, but better to try and catch it.
2530 */
2531 ceph_msg_revoke(req->r_request);
2532 ceph_msg_revoke_incoming(req->r_reply);
2533 }
2534
2535 static void __complete_request(struct ceph_osd_request *req)
2536 {
2537 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
2538 req->r_tid, req->r_callback, req->r_result);
2539
2540 if (req->r_callback)
2541 req->r_callback(req);
2542 complete_all(&req->r_completion);
2543 ceph_osdc_put_request(req);
2544 }
2545
2546 static void complete_request_workfn(struct work_struct *work)
2547 {
2548 struct ceph_osd_request *req =
2549 container_of(work, struct ceph_osd_request, r_complete_work);
2550
2551 __complete_request(req);
2552 }
2553
2554 /*
2555 * This is open-coded in handle_reply().
2556 */
2557 static void complete_request(struct ceph_osd_request *req, int err)
2558 {
2559 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2560
2561 req->r_result = err;
2562 finish_request(req);
2563
2564 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2565 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
2566 }
2567
2568 static void cancel_map_check(struct ceph_osd_request *req)
2569 {
2570 struct ceph_osd_client *osdc = req->r_osdc;
2571 struct ceph_osd_request *lookup_req;
2572
2573 verify_osdc_wrlocked(osdc);
2574
2575 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2576 if (!lookup_req)
2577 return;
2578
2579 WARN_ON(lookup_req != req);
2580 erase_request_mc(&osdc->map_checks, req);
2581 ceph_osdc_put_request(req);
2582 }
2583
2584 static void cancel_request(struct ceph_osd_request *req)
2585 {
2586 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2587
2588 cancel_map_check(req);
2589 finish_request(req);
2590 complete_all(&req->r_completion);
2591 ceph_osdc_put_request(req);
2592 }
2593
2594 static void abort_request(struct ceph_osd_request *req, int err)
2595 {
2596 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2597
2598 cancel_map_check(req);
2599 complete_request(req, err);
2600 }
2601
2602 static int abort_fn(struct ceph_osd_request *req, void *arg)
2603 {
2604 int err = *(int *)arg;
2605
2606 abort_request(req, err);
2607 return 0; /* continue iteration */
2608 }
2609
2610 /*
2611 * Abort all in-flight requests with @err and arrange for all future
2612 * requests to be failed immediately.
2613 */
2614 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2615 {
2616 dout("%s osdc %p err %d\n", __func__, osdc, err);
2617 down_write(&osdc->lock);
2618 for_each_request(osdc, abort_fn, &err);
2619 osdc->abort_err = err;
2620 up_write(&osdc->lock);
2621 }
2622 EXPORT_SYMBOL(ceph_osdc_abort_requests);
2623
2624 void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc)
2625 {
2626 down_write(&osdc->lock);
2627 osdc->abort_err = 0;
2628 up_write(&osdc->lock);
2629 }
2630 EXPORT_SYMBOL(ceph_osdc_clear_abort_err);
2631
2632 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2633 {
2634 if (likely(eb > osdc->epoch_barrier)) {
2635 dout("updating epoch_barrier from %u to %u\n",
2636 osdc->epoch_barrier, eb);
2637 osdc->epoch_barrier = eb;
2638 /* Request map if we're not to the barrier yet */
2639 if (eb > osdc->osdmap->epoch)
2640 maybe_request_map(osdc);
2641 }
2642 }
2643
2644 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2645 {
2646 down_read(&osdc->lock);
2647 if (unlikely(eb > osdc->epoch_barrier)) {
2648 up_read(&osdc->lock);
2649 down_write(&osdc->lock);
2650 update_epoch_barrier(osdc, eb);
2651 up_write(&osdc->lock);
2652 } else {
2653 up_read(&osdc->lock);
2654 }
2655 }
2656 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2657
2658 /*
2659 * We can end up releasing caps as a result of abort_request().
2660 * In that case, we probably want to ensure that the cap release message
2661 * has an updated epoch barrier in it, so set the epoch barrier prior to
2662 * aborting the first request.
2663 */
2664 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2665 {
2666 struct ceph_osd_client *osdc = req->r_osdc;
2667 bool *victims = arg;
2668
2669 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2670 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2671 pool_full(osdc, req->r_t.base_oloc.pool))) {
2672 if (!*victims) {
2673 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2674 *victims = true;
2675 }
2676 abort_request(req, -ENOSPC);
2677 }
2678
2679 return 0; /* continue iteration */
2680 }
2681
2682 /*
2683 * Drop all pending requests that are stalled waiting on a full condition to
2684 * clear, and complete them with ENOSPC as the return code. Set the
2685 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2686 * cancelled.
2687 */
2688 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2689 {
2690 bool victims = false;
2691
2692 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
2693 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
2694 for_each_request(osdc, abort_on_full_fn, &victims);
2695 }
2696
2697 static void check_pool_dne(struct ceph_osd_request *req)
2698 {
2699 struct ceph_osd_client *osdc = req->r_osdc;
2700 struct ceph_osdmap *map = osdc->osdmap;
2701
2702 verify_osdc_wrlocked(osdc);
2703 WARN_ON(!map->epoch);
2704
2705 if (req->r_attempts) {
2706 /*
2707 * We sent a request earlier, which means that
2708 * previously the pool existed, and now it does not
2709 * (i.e., it was deleted).
2710 */
2711 req->r_map_dne_bound = map->epoch;
2712 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2713 req->r_tid);
2714 } else {
2715 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2716 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2717 }
2718
2719 if (req->r_map_dne_bound) {
2720 if (map->epoch >= req->r_map_dne_bound) {
2721 /* we had a new enough map */
2722 pr_info_ratelimited("tid %llu pool does not exist\n",
2723 req->r_tid);
2724 complete_request(req, -ENOENT);
2725 }
2726 } else {
2727 send_map_check(req);
2728 }
2729 }
2730
2731 static void map_check_cb(struct ceph_mon_generic_request *greq)
2732 {
2733 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2734 struct ceph_osd_request *req;
2735 u64 tid = greq->private_data;
2736
2737 WARN_ON(greq->result || !greq->u.newest);
2738
2739 down_write(&osdc->lock);
2740 req = lookup_request_mc(&osdc->map_checks, tid);
2741 if (!req) {
2742 dout("%s tid %llu dne\n", __func__, tid);
2743 goto out_unlock;
2744 }
2745
2746 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2747 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2748 if (!req->r_map_dne_bound)
2749 req->r_map_dne_bound = greq->u.newest;
2750 erase_request_mc(&osdc->map_checks, req);
2751 check_pool_dne(req);
2752
2753 ceph_osdc_put_request(req);
2754 out_unlock:
2755 up_write(&osdc->lock);
2756 }
2757
2758 static void send_map_check(struct ceph_osd_request *req)
2759 {
2760 struct ceph_osd_client *osdc = req->r_osdc;
2761 struct ceph_osd_request *lookup_req;
2762 int ret;
2763
2764 verify_osdc_wrlocked(osdc);
2765
2766 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2767 if (lookup_req) {
2768 WARN_ON(lookup_req != req);
2769 return;
2770 }
2771
2772 ceph_osdc_get_request(req);
2773 insert_request_mc(&osdc->map_checks, req);
2774 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2775 map_check_cb, req->r_tid);
2776 WARN_ON(ret);
2777 }
2778
2779 /*
2780 * lingering requests, watch/notify v2 infrastructure
2781 */
2782 static void linger_release(struct kref *kref)
2783 {
2784 struct ceph_osd_linger_request *lreq =
2785 container_of(kref, struct ceph_osd_linger_request, kref);
2786
2787 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2788 lreq->reg_req, lreq->ping_req);
2789 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2790 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
2791 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2792 WARN_ON(!list_empty(&lreq->scan_item));
2793 WARN_ON(!list_empty(&lreq->pending_lworks));
2794 WARN_ON(lreq->osd);
2795
2796 if (lreq->request_pl)
2797 ceph_pagelist_release(lreq->request_pl);
2798 if (lreq->notify_id_pages)
2799 ceph_release_page_vector(lreq->notify_id_pages, 1);
2800
2801 ceph_osdc_put_request(lreq->reg_req);
2802 ceph_osdc_put_request(lreq->ping_req);
2803 target_destroy(&lreq->t);
2804 kfree(lreq);
2805 }
2806
2807 static void linger_put(struct ceph_osd_linger_request *lreq)
2808 {
2809 if (lreq)
2810 kref_put(&lreq->kref, linger_release);
2811 }
2812
2813 static struct ceph_osd_linger_request *
2814 linger_get(struct ceph_osd_linger_request *lreq)
2815 {
2816 kref_get(&lreq->kref);
2817 return lreq;
2818 }
2819
2820 static struct ceph_osd_linger_request *
2821 linger_alloc(struct ceph_osd_client *osdc)
2822 {
2823 struct ceph_osd_linger_request *lreq;
2824
2825 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2826 if (!lreq)
2827 return NULL;
2828
2829 kref_init(&lreq->kref);
2830 mutex_init(&lreq->lock);
2831 RB_CLEAR_NODE(&lreq->node);
2832 RB_CLEAR_NODE(&lreq->osdc_node);
2833 RB_CLEAR_NODE(&lreq->mc_node);
2834 INIT_LIST_HEAD(&lreq->scan_item);
2835 INIT_LIST_HEAD(&lreq->pending_lworks);
2836 init_completion(&lreq->reg_commit_wait);
2837 init_completion(&lreq->notify_finish_wait);
2838
2839 lreq->osdc = osdc;
2840 target_init(&lreq->t);
2841
2842 dout("%s lreq %p\n", __func__, lreq);
2843 return lreq;
2844 }
2845
2846 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2847 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
2848 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2849
2850 /*
2851 * Create linger request <-> OSD session relation.
2852 *
2853 * @lreq has to be registered, @osd may be homeless.
2854 */
2855 static void link_linger(struct ceph_osd *osd,
2856 struct ceph_osd_linger_request *lreq)
2857 {
2858 verify_osd_locked(osd);
2859 WARN_ON(!lreq->linger_id || lreq->osd);
2860 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2861 osd->o_osd, lreq, lreq->linger_id);
2862
2863 if (!osd_homeless(osd))
2864 __remove_osd_from_lru(osd);
2865 else
2866 atomic_inc(&osd->o_osdc->num_homeless);
2867
2868 get_osd(osd);
2869 insert_linger(&osd->o_linger_requests, lreq);
2870 lreq->osd = osd;
2871 }
2872
2873 static void unlink_linger(struct ceph_osd *osd,
2874 struct ceph_osd_linger_request *lreq)
2875 {
2876 verify_osd_locked(osd);
2877 WARN_ON(lreq->osd != osd);
2878 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2879 osd->o_osd, lreq, lreq->linger_id);
2880
2881 lreq->osd = NULL;
2882 erase_linger(&osd->o_linger_requests, lreq);
2883 put_osd(osd);
2884
2885 if (!osd_homeless(osd))
2886 maybe_move_osd_to_lru(osd);
2887 else
2888 atomic_dec(&osd->o_osdc->num_homeless);
2889 }
2890
2891 static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2892 {
2893 verify_osdc_locked(lreq->osdc);
2894
2895 return !RB_EMPTY_NODE(&lreq->osdc_node);
2896 }
2897
2898 static bool linger_registered(struct ceph_osd_linger_request *lreq)
2899 {
2900 struct ceph_osd_client *osdc = lreq->osdc;
2901 bool registered;
2902
2903 down_read(&osdc->lock);
2904 registered = __linger_registered(lreq);
2905 up_read(&osdc->lock);
2906
2907 return registered;
2908 }
2909
2910 static void linger_register(struct ceph_osd_linger_request *lreq)
2911 {
2912 struct ceph_osd_client *osdc = lreq->osdc;
2913
2914 verify_osdc_wrlocked(osdc);
2915 WARN_ON(lreq->linger_id);
2916
2917 linger_get(lreq);
2918 lreq->linger_id = ++osdc->last_linger_id;
2919 insert_linger_osdc(&osdc->linger_requests, lreq);
2920 }
2921
2922 static void linger_unregister(struct ceph_osd_linger_request *lreq)
2923 {
2924 struct ceph_osd_client *osdc = lreq->osdc;
2925
2926 verify_osdc_wrlocked(osdc);
2927
2928 erase_linger_osdc(&osdc->linger_requests, lreq);
2929 linger_put(lreq);
2930 }
2931
2932 static void cancel_linger_request(struct ceph_osd_request *req)
2933 {
2934 struct ceph_osd_linger_request *lreq = req->r_priv;
2935
2936 WARN_ON(!req->r_linger);
2937 cancel_request(req);
2938 linger_put(lreq);
2939 }
2940
2941 struct linger_work {
2942 struct work_struct work;
2943 struct ceph_osd_linger_request *lreq;
2944 struct list_head pending_item;
2945 unsigned long queued_stamp;
2946
2947 union {
2948 struct {
2949 u64 notify_id;
2950 u64 notifier_id;
2951 void *payload; /* points into @msg front */
2952 size_t payload_len;
2953
2954 struct ceph_msg *msg; /* for ceph_msg_put() */
2955 } notify;
2956 struct {
2957 int err;
2958 } error;
2959 };
2960 };
2961
2962 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2963 work_func_t workfn)
2964 {
2965 struct linger_work *lwork;
2966
2967 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2968 if (!lwork)
2969 return NULL;
2970
2971 INIT_WORK(&lwork->work, workfn);
2972 INIT_LIST_HEAD(&lwork->pending_item);
2973 lwork->lreq = linger_get(lreq);
2974
2975 return lwork;
2976 }
2977
2978 static void lwork_free(struct linger_work *lwork)
2979 {
2980 struct ceph_osd_linger_request *lreq = lwork->lreq;
2981
2982 mutex_lock(&lreq->lock);
2983 list_del(&lwork->pending_item);
2984 mutex_unlock(&lreq->lock);
2985
2986 linger_put(lreq);
2987 kfree(lwork);
2988 }
2989
2990 static void lwork_queue(struct linger_work *lwork)
2991 {
2992 struct ceph_osd_linger_request *lreq = lwork->lreq;
2993 struct ceph_osd_client *osdc = lreq->osdc;
2994
2995 verify_lreq_locked(lreq);
2996 WARN_ON(!list_empty(&lwork->pending_item));
2997
2998 lwork->queued_stamp = jiffies;
2999 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
3000 queue_work(osdc->notify_wq, &lwork->work);
3001 }
3002
3003 static void do_watch_notify(struct work_struct *w)
3004 {
3005 struct linger_work *lwork = container_of(w, struct linger_work, work);
3006 struct ceph_osd_linger_request *lreq = lwork->lreq;
3007
3008 if (!linger_registered(lreq)) {
3009 dout("%s lreq %p not registered\n", __func__, lreq);
3010 goto out;
3011 }
3012
3013 WARN_ON(!lreq->is_watch);
3014 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
3015 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
3016 lwork->notify.payload_len);
3017 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
3018 lwork->notify.notifier_id, lwork->notify.payload,
3019 lwork->notify.payload_len);
3020
3021 out:
3022 ceph_msg_put(lwork->notify.msg);
3023 lwork_free(lwork);
3024 }
3025
3026 static void do_watch_error(struct work_struct *w)
3027 {
3028 struct linger_work *lwork = container_of(w, struct linger_work, work);
3029 struct ceph_osd_linger_request *lreq = lwork->lreq;
3030
3031 if (!linger_registered(lreq)) {
3032 dout("%s lreq %p not registered\n", __func__, lreq);
3033 goto out;
3034 }
3035
3036 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
3037 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
3038
3039 out:
3040 lwork_free(lwork);
3041 }
3042
3043 static void queue_watch_error(struct ceph_osd_linger_request *lreq)
3044 {
3045 struct linger_work *lwork;
3046
3047 lwork = lwork_alloc(lreq, do_watch_error);
3048 if (!lwork) {
3049 pr_err("failed to allocate error-lwork\n");
3050 return;
3051 }
3052
3053 lwork->error.err = lreq->last_error;
3054 lwork_queue(lwork);
3055 }
3056
3057 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
3058 int result)
3059 {
3060 if (!completion_done(&lreq->reg_commit_wait)) {
3061 lreq->reg_commit_error = (result <= 0 ? result : 0);
3062 complete_all(&lreq->reg_commit_wait);
3063 }
3064 }
3065
3066 static void linger_commit_cb(struct ceph_osd_request *req)
3067 {
3068 struct ceph_osd_linger_request *lreq = req->r_priv;
3069
3070 mutex_lock(&lreq->lock);
3071 if (req != lreq->reg_req) {
3072 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
3073 __func__, lreq, lreq->linger_id, req, lreq->reg_req);
3074 goto out;
3075 }
3076
3077 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
3078 lreq->linger_id, req->r_result);
3079 linger_reg_commit_complete(lreq, req->r_result);
3080 lreq->committed = true;
3081
3082 if (!lreq->is_watch) {
3083 struct ceph_osd_data *osd_data =
3084 osd_req_op_data(req, 0, notify, response_data);
3085 void *p = page_address(osd_data->pages[0]);
3086
3087 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
3088 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
3089
3090 /* make note of the notify_id */
3091 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
3092 lreq->notify_id = ceph_decode_64(&p);
3093 dout("lreq %p notify_id %llu\n", lreq,
3094 lreq->notify_id);
3095 } else {
3096 dout("lreq %p no notify_id\n", lreq);
3097 }
3098 }
3099
3100 out:
3101 mutex_unlock(&lreq->lock);
3102 linger_put(lreq);
3103 }
3104
3105 static int normalize_watch_error(int err)
3106 {
3107 /*
3108 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
3109 * notification and a failure to reconnect because we raced with
3110 * the delete appear the same to the user.
3111 */
3112 if (err == -ENOENT)
3113 err = -ENOTCONN;
3114
3115 return err;
3116 }
3117
3118 static void linger_reconnect_cb(struct ceph_osd_request *req)
3119 {
3120 struct ceph_osd_linger_request *lreq = req->r_priv;
3121
3122 mutex_lock(&lreq->lock);
3123 if (req != lreq->reg_req) {
3124 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
3125 __func__, lreq, lreq->linger_id, req, lreq->reg_req);
3126 goto out;
3127 }
3128
3129 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
3130 lreq, lreq->linger_id, req->r_result, lreq->last_error);
3131 if (req->r_result < 0) {
3132 if (!lreq->last_error) {
3133 lreq->last_error = normalize_watch_error(req->r_result);
3134 queue_watch_error(lreq);
3135 }
3136 }
3137
3138 out:
3139 mutex_unlock(&lreq->lock);
3140 linger_put(lreq);
3141 }
3142
3143 static void send_linger(struct ceph_osd_linger_request *lreq)
3144 {
3145 struct ceph_osd_client *osdc = lreq->osdc;
3146 struct ceph_osd_request *req;
3147 int ret;
3148
3149 verify_osdc_wrlocked(osdc);
3150 mutex_lock(&lreq->lock);
3151 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3152
3153 if (lreq->reg_req) {
3154 if (lreq->reg_req->r_osd)
3155 cancel_linger_request(lreq->reg_req);
3156 ceph_osdc_put_request(lreq->reg_req);
3157 }
3158
3159 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO);
3160 BUG_ON(!req);
3161
3162 target_copy(&req->r_t, &lreq->t);
3163 req->r_mtime = lreq->mtime;
3164
3165 if (lreq->is_watch && lreq->committed) {
3166 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_RECONNECT,
3167 lreq->linger_id, ++lreq->register_gen);
3168 dout("lreq %p reconnect register_gen %u\n", lreq,
3169 req->r_ops[0].watch.gen);
3170 req->r_callback = linger_reconnect_cb;
3171 } else {
3172 if (lreq->is_watch) {
3173 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_WATCH,
3174 lreq->linger_id, 0);
3175 } else {
3176 lreq->notify_id = 0;
3177
3178 refcount_inc(&lreq->request_pl->refcnt);
3179 osd_req_op_notify_init(req, 0, lreq->linger_id,
3180 lreq->request_pl);
3181 ceph_osd_data_pages_init(
3182 osd_req_op_data(req, 0, notify, response_data),
3183 lreq->notify_id_pages, PAGE_SIZE, 0, false, false);
3184 }
3185 dout("lreq %p register\n", lreq);
3186 req->r_callback = linger_commit_cb;
3187 }
3188
3189 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3190 BUG_ON(ret);
3191
3192 req->r_priv = linger_get(lreq);
3193 req->r_linger = true;
3194 lreq->reg_req = req;
3195 mutex_unlock(&lreq->lock);
3196
3197 submit_request(req, true);
3198 }
3199
3200 static void linger_ping_cb(struct ceph_osd_request *req)
3201 {
3202 struct ceph_osd_linger_request *lreq = req->r_priv;
3203
3204 mutex_lock(&lreq->lock);
3205 if (req != lreq->ping_req) {
3206 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
3207 __func__, lreq, lreq->linger_id, req, lreq->ping_req);
3208 goto out;
3209 }
3210
3211 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3212 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3213 lreq->last_error);
3214 if (lreq->register_gen == req->r_ops[0].watch.gen) {
3215 if (!req->r_result) {
3216 lreq->watch_valid_thru = lreq->ping_sent;
3217 } else if (!lreq->last_error) {
3218 lreq->last_error = normalize_watch_error(req->r_result);
3219 queue_watch_error(lreq);
3220 }
3221 } else {
3222 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3223 lreq->register_gen, req->r_ops[0].watch.gen);
3224 }
3225
3226 out:
3227 mutex_unlock(&lreq->lock);
3228 linger_put(lreq);
3229 }
3230
3231 static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3232 {
3233 struct ceph_osd_client *osdc = lreq->osdc;
3234 struct ceph_osd_request *req;
3235 int ret;
3236
3237 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
3238 dout("%s PAUSERD\n", __func__);
3239 return;
3240 }
3241
3242 lreq->ping_sent = jiffies;
3243 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3244 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3245 lreq->register_gen);
3246
3247 if (lreq->ping_req) {
3248 if (lreq->ping_req->r_osd)
3249 cancel_linger_request(lreq->ping_req);
3250 ceph_osdc_put_request(lreq->ping_req);
3251 }
3252
3253 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO);
3254 BUG_ON(!req);
3255
3256 target_copy(&req->r_t, &lreq->t);
3257 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_PING, lreq->linger_id,
3258 lreq->register_gen);
3259 req->r_callback = linger_ping_cb;
3260
3261 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3262 BUG_ON(ret);
3263
3264 req->r_priv = linger_get(lreq);
3265 req->r_linger = true;
3266 lreq->ping_req = req;
3267
3268 ceph_osdc_get_request(req);
3269 account_request(req);
3270 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3271 link_request(lreq->osd, req);
3272 send_request(req);
3273 }
3274
3275 static void linger_submit(struct ceph_osd_linger_request *lreq)
3276 {
3277 struct ceph_osd_client *osdc = lreq->osdc;
3278 struct ceph_osd *osd;
3279
3280 down_write(&osdc->lock);
3281 linger_register(lreq);
3282
3283 calc_target(osdc, &lreq->t, false);
3284 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3285 link_linger(osd, lreq);
3286
3287 send_linger(lreq);
3288 up_write(&osdc->lock);
3289 }
3290
3291 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3292 {
3293 struct ceph_osd_client *osdc = lreq->osdc;
3294 struct ceph_osd_linger_request *lookup_lreq;
3295
3296 verify_osdc_wrlocked(osdc);
3297
3298 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3299 lreq->linger_id);
3300 if (!lookup_lreq)
3301 return;
3302
3303 WARN_ON(lookup_lreq != lreq);
3304 erase_linger_mc(&osdc->linger_map_checks, lreq);
3305 linger_put(lreq);
3306 }
3307
3308 /*
3309 * @lreq has to be both registered and linked.
3310 */
3311 static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3312 {
3313 if (lreq->ping_req && lreq->ping_req->r_osd)
3314 cancel_linger_request(lreq->ping_req);
3315 if (lreq->reg_req && lreq->reg_req->r_osd)
3316 cancel_linger_request(lreq->reg_req);
3317 cancel_linger_map_check(lreq);
3318 unlink_linger(lreq->osd, lreq);
3319 linger_unregister(lreq);
3320 }
3321
3322 static void linger_cancel(struct ceph_osd_linger_request *lreq)
3323 {
3324 struct ceph_osd_client *osdc = lreq->osdc;
3325
3326 down_write(&osdc->lock);
3327 if (__linger_registered(lreq))
3328 __linger_cancel(lreq);
3329 up_write(&osdc->lock);
3330 }
3331
3332 static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3333
3334 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3335 {
3336 struct ceph_osd_client *osdc = lreq->osdc;
3337 struct ceph_osdmap *map = osdc->osdmap;
3338
3339 verify_osdc_wrlocked(osdc);
3340 WARN_ON(!map->epoch);
3341
3342 if (lreq->register_gen) {
3343 lreq->map_dne_bound = map->epoch;
3344 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3345 lreq, lreq->linger_id);
3346 } else {
3347 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3348 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3349 map->epoch);
3350 }
3351
3352 if (lreq->map_dne_bound) {
3353 if (map->epoch >= lreq->map_dne_bound) {
3354 /* we had a new enough map */
3355 pr_info("linger_id %llu pool does not exist\n",
3356 lreq->linger_id);
3357 linger_reg_commit_complete(lreq, -ENOENT);
3358 __linger_cancel(lreq);
3359 }
3360 } else {
3361 send_linger_map_check(lreq);
3362 }
3363 }
3364
3365 static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3366 {
3367 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3368 struct ceph_osd_linger_request *lreq;
3369 u64 linger_id = greq->private_data;
3370
3371 WARN_ON(greq->result || !greq->u.newest);
3372
3373 down_write(&osdc->lock);
3374 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3375 if (!lreq) {
3376 dout("%s linger_id %llu dne\n", __func__, linger_id);
3377 goto out_unlock;
3378 }
3379
3380 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3381 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3382 greq->u.newest);
3383 if (!lreq->map_dne_bound)
3384 lreq->map_dne_bound = greq->u.newest;
3385 erase_linger_mc(&osdc->linger_map_checks, lreq);
3386 check_linger_pool_dne(lreq);
3387
3388 linger_put(lreq);
3389 out_unlock:
3390 up_write(&osdc->lock);
3391 }
3392
3393 static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3394 {
3395 struct ceph_osd_client *osdc = lreq->osdc;
3396 struct ceph_osd_linger_request *lookup_lreq;
3397 int ret;
3398
3399 verify_osdc_wrlocked(osdc);
3400
3401 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3402 lreq->linger_id);
3403 if (lookup_lreq) {
3404 WARN_ON(lookup_lreq != lreq);
3405 return;
3406 }
3407
3408 linger_get(lreq);
3409 insert_linger_mc(&osdc->linger_map_checks, lreq);
3410 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3411 linger_map_check_cb, lreq->linger_id);
3412 WARN_ON(ret);
3413 }
3414
3415 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3416 {
3417 int ret;
3418
3419 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3420 ret = wait_for_completion_killable(&lreq->reg_commit_wait);
3421 return ret ?: lreq->reg_commit_error;
3422 }
3423
3424 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq,
3425 unsigned long timeout)
3426 {
3427 long left;
3428
3429 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3430 left = wait_for_completion_killable_timeout(&lreq->notify_finish_wait,
3431 ceph_timeout_jiffies(timeout));
3432 if (left <= 0)
3433 left = left ?: -ETIMEDOUT;
3434 else
3435 left = lreq->notify_finish_error; /* completed */
3436
3437 return left;
3438 }
3439
3440 /*
3441 * Timeout callback, called every N seconds. When 1 or more OSD
3442 * requests has been active for more than N seconds, we send a keepalive
3443 * (tag + timestamp) to its OSD to ensure any communications channel
3444 * reset is detected.
3445 */
3446 static void handle_timeout(struct work_struct *work)
3447 {
3448 struct ceph_osd_client *osdc =
3449 container_of(work, struct ceph_osd_client, timeout_work.work);
3450 struct ceph_options *opts = osdc->client->options;
3451 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3452 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3453 LIST_HEAD(slow_osds);
3454 struct rb_node *n, *p;
3455
3456 dout("%s osdc %p\n", __func__, osdc);
3457 down_write(&osdc->lock);
3458
3459 /*
3460 * ping osds that are a bit slow. this ensures that if there
3461 * is a break in the TCP connection we will notice, and reopen
3462 * a connection with that osd (from the fault callback).
3463 */
3464 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3465 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3466 bool found = false;
3467
3468 for (p = rb_first(&osd->o_requests); p; ) {
3469 struct ceph_osd_request *req =
3470 rb_entry(p, struct ceph_osd_request, r_node);
3471
3472 p = rb_next(p); /* abort_request() */
3473
3474 if (time_before(req->r_stamp, cutoff)) {
3475 dout(" req %p tid %llu on osd%d is laggy\n",
3476 req, req->r_tid, osd->o_osd);
3477 found = true;
3478 }
3479 if (opts->osd_request_timeout &&
3480 time_before(req->r_start_stamp, expiry_cutoff)) {
3481 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3482 req->r_tid, osd->o_osd);
3483 abort_request(req, -ETIMEDOUT);
3484 }
3485 }
3486 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3487 struct ceph_osd_linger_request *lreq =
3488 rb_entry(p, struct ceph_osd_linger_request, node);
3489
3490 dout(" lreq %p linger_id %llu is served by osd%d\n",
3491 lreq, lreq->linger_id, osd->o_osd);
3492 found = true;
3493
3494 mutex_lock(&lreq->lock);
3495 if (lreq->is_watch && lreq->committed && !lreq->last_error)
3496 send_linger_ping(lreq);
3497 mutex_unlock(&lreq->lock);
3498 }
3499
3500 if (found)
3501 list_move_tail(&osd->o_keepalive_item, &slow_osds);
3502 }
3503
3504 if (opts->osd_request_timeout) {
3505 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3506 struct ceph_osd_request *req =
3507 rb_entry(p, struct ceph_osd_request, r_node);
3508
3509 p = rb_next(p); /* abort_request() */
3510
3511 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3512 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3513 req->r_tid, osdc->homeless_osd.o_osd);
3514 abort_request(req, -ETIMEDOUT);
3515 }
3516 }
3517 }
3518
3519 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3520 maybe_request_map(osdc);
3521
3522 while (!list_empty(&slow_osds)) {
3523 struct ceph_osd *osd = list_first_entry(&slow_osds,
3524 struct ceph_osd,
3525 o_keepalive_item);
3526 list_del_init(&osd->o_keepalive_item);
3527 ceph_con_keepalive(&osd->o_con);
3528 }
3529
3530 up_write(&osdc->lock);
3531 schedule_delayed_work(&osdc->timeout_work,
3532 osdc->client->options->osd_keepalive_timeout);
3533 }
3534
3535 static void handle_osds_timeout(struct work_struct *work)
3536 {
3537 struct ceph_osd_client *osdc =
3538 container_of(work, struct ceph_osd_client,
3539 osds_timeout_work.work);
3540 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3541 struct ceph_osd *osd, *nosd;
3542
3543 dout("%s osdc %p\n", __func__, osdc);
3544 down_write(&osdc->lock);
3545 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3546 if (time_before(jiffies, osd->lru_ttl))
3547 break;
3548
3549 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3550 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3551 close_osd(osd);
3552 }
3553
3554 up_write(&osdc->lock);
3555 schedule_delayed_work(&osdc->osds_timeout_work,
3556 round_jiffies_relative(delay));
3557 }
3558
3559 static int ceph_oloc_decode(void **p, void *end,
3560 struct ceph_object_locator *oloc)
3561 {
3562 u8 struct_v, struct_cv;
3563 u32 len;
3564 void *struct_end;
3565 int ret = 0;
3566
3567 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3568 struct_v = ceph_decode_8(p);
3569 struct_cv = ceph_decode_8(p);
3570 if (struct_v < 3) {
3571 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3572 struct_v, struct_cv);
3573 goto e_inval;
3574 }
3575 if (struct_cv > 6) {
3576 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3577 struct_v, struct_cv);
3578 goto e_inval;
3579 }
3580 len = ceph_decode_32(p);
3581 ceph_decode_need(p, end, len, e_inval);
3582 struct_end = *p + len;
3583
3584 oloc->pool = ceph_decode_64(p);
3585 *p += 4; /* skip preferred */
3586
3587 len = ceph_decode_32(p);
3588 if (len > 0) {
3589 pr_warn("ceph_object_locator::key is set\n");
3590 goto e_inval;
3591 }
3592
3593 if (struct_v >= 5) {
3594 bool changed = false;
3595
3596 len = ceph_decode_32(p);
3597 if (len > 0) {
3598 ceph_decode_need(p, end, len, e_inval);
3599 if (!oloc->pool_ns ||
3600 ceph_compare_string(oloc->pool_ns, *p, len))
3601 changed = true;
3602 *p += len;
3603 } else {
3604 if (oloc->pool_ns)
3605 changed = true;
3606 }
3607 if (changed) {
3608 /* redirect changes namespace */
3609 pr_warn("ceph_object_locator::nspace is changed\n");
3610 goto e_inval;
3611 }
3612 }
3613
3614 if (struct_v >= 6) {
3615 s64 hash = ceph_decode_64(p);
3616 if (hash != -1) {
3617 pr_warn("ceph_object_locator::hash is set\n");
3618 goto e_inval;
3619 }
3620 }
3621
3622 /* skip the rest */
3623 *p = struct_end;
3624 out:
3625 return ret;
3626
3627 e_inval:
3628 ret = -EINVAL;
3629 goto out;
3630 }
3631
3632 static int ceph_redirect_decode(void **p, void *end,
3633 struct ceph_request_redirect *redir)
3634 {
3635 u8 struct_v, struct_cv;
3636 u32 len;
3637 void *struct_end;
3638 int ret;
3639
3640 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3641 struct_v = ceph_decode_8(p);
3642 struct_cv = ceph_decode_8(p);
3643 if (struct_cv > 1) {
3644 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3645 struct_v, struct_cv);
3646 goto e_inval;
3647 }
3648 len = ceph_decode_32(p);
3649 ceph_decode_need(p, end, len, e_inval);
3650 struct_end = *p + len;
3651
3652 ret = ceph_oloc_decode(p, end, &redir->oloc);
3653 if (ret)
3654 goto out;
3655
3656 len = ceph_decode_32(p);
3657 if (len > 0) {
3658 pr_warn("ceph_request_redirect::object_name is set\n");
3659 goto e_inval;
3660 }
3661
3662 /* skip the rest */
3663 *p = struct_end;
3664 out:
3665 return ret;
3666
3667 e_inval:
3668 ret = -EINVAL;
3669 goto out;
3670 }
3671
3672 struct MOSDOpReply {
3673 struct ceph_pg pgid;
3674 u64 flags;
3675 int result;
3676 u32 epoch;
3677 int num_ops;
3678 u32 outdata_len[CEPH_OSD_MAX_OPS];
3679 s32 rval[CEPH_OSD_MAX_OPS];
3680 int retry_attempt;
3681 struct ceph_eversion replay_version;
3682 u64 user_version;
3683 struct ceph_request_redirect redirect;
3684 };
3685
3686 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
3687 {
3688 void *p = msg->front.iov_base;
3689 void *const end = p + msg->front.iov_len;
3690 u16 version = le16_to_cpu(msg->hdr.version);
3691 struct ceph_eversion bad_replay_version;
3692 u8 decode_redir;
3693 u32 len;
3694 int ret;
3695 int i;
3696
3697 ceph_decode_32_safe(&p, end, len, e_inval);
3698 ceph_decode_need(&p, end, len, e_inval);
3699 p += len; /* skip oid */
3700
3701 ret = ceph_decode_pgid(&p, end, &m->pgid);
3702 if (ret)
3703 return ret;
3704
3705 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3706 ceph_decode_32_safe(&p, end, m->result, e_inval);
3707 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3708 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3709 p += sizeof(bad_replay_version);
3710 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
3711
3712 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3713 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3714 goto e_inval;
3715
3716 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3717 e_inval);
3718 for (i = 0; i < m->num_ops; i++) {
3719 struct ceph_osd_op *op = p;
3720
3721 m->outdata_len[i] = le32_to_cpu(op->payload_len);
3722 p += sizeof(*op);
3723 }
3724
3725 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3726 for (i = 0; i < m->num_ops; i++)
3727 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
3728
3729 if (version >= 5) {
3730 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3731 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3732 p += sizeof(m->replay_version);
3733 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3734 } else {
3735 m->replay_version = bad_replay_version; /* struct */
3736 m->user_version = le64_to_cpu(m->replay_version.version);
3737 }
3738
3739 if (version >= 6) {
3740 if (version >= 7)
3741 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
3742 else
3743 decode_redir = 1;
3744 } else {
3745 decode_redir = 0;
3746 }
3747
3748 if (decode_redir) {
3749 ret = ceph_redirect_decode(&p, end, &m->redirect);
3750 if (ret)
3751 return ret;
3752 } else {
3753 ceph_oloc_init(&m->redirect.oloc);
3754 }
3755
3756 return 0;
3757
3758 e_inval:
3759 return -EINVAL;
3760 }
3761
3762 /*
3763 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3764 * specified.
3765 */
3766 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3767 {
3768 struct ceph_osd_client *osdc = osd->o_osdc;
3769 struct ceph_osd_request *req;
3770 struct MOSDOpReply m;
3771 u64 tid = le64_to_cpu(msg->hdr.tid);
3772 u32 data_len = 0;
3773 int ret;
3774 int i;
3775
3776 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3777
3778 down_read(&osdc->lock);
3779 if (!osd_registered(osd)) {
3780 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3781 goto out_unlock_osdc;
3782 }
3783 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3784
3785 mutex_lock(&osd->lock);
3786 req = lookup_request(&osd->o_requests, tid);
3787 if (!req) {
3788 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3789 goto out_unlock_session;
3790 }
3791
3792 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3793 ret = decode_MOSDOpReply(msg, &m);
3794 m.redirect.oloc.pool_ns = NULL;
3795 if (ret) {
3796 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3797 req->r_tid, ret);
3798 ceph_msg_dump(msg);
3799 goto fail_request;
3800 }
3801 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3802 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3803 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3804 le64_to_cpu(m.replay_version.version), m.user_version);
3805
3806 if (m.retry_attempt >= 0) {
3807 if (m.retry_attempt != req->r_attempts - 1) {
3808 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3809 req, req->r_tid, m.retry_attempt,
3810 req->r_attempts - 1);
3811 goto out_unlock_session;
3812 }
3813 } else {
3814 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3815 }
3816
3817 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3818 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3819 m.redirect.oloc.pool);
3820 unlink_request(osd, req);
3821 mutex_unlock(&osd->lock);
3822
3823 /*
3824 * Not ceph_oloc_copy() - changing pool_ns is not
3825 * supported.
3826 */
3827 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3828 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED |
3829 CEPH_OSD_FLAG_IGNORE_OVERLAY |
3830 CEPH_OSD_FLAG_IGNORE_CACHE;
3831 req->r_tid = 0;
3832 __submit_request(req, false);
3833 goto out_unlock_osdc;
3834 }
3835
3836 if (m.result == -EAGAIN) {
3837 dout("req %p tid %llu EAGAIN\n", req, req->r_tid);
3838 unlink_request(osd, req);
3839 mutex_unlock(&osd->lock);
3840
3841 /*
3842 * The object is missing on the replica or not (yet)
3843 * readable. Clear pgid to force a resend to the primary
3844 * via legacy_change.
3845 */
3846 req->r_t.pgid.pool = 0;
3847 req->r_t.pgid.seed = 0;
3848 WARN_ON(!req->r_t.used_replica);
3849 req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS |
3850 CEPH_OSD_FLAG_LOCALIZE_READS);
3851 req->r_tid = 0;
3852 __submit_request(req, false);
3853 goto out_unlock_osdc;
3854 }
3855
3856 if (m.num_ops != req->r_num_ops) {
3857 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3858 req->r_num_ops, req->r_tid);
3859 goto fail_request;
3860 }
3861 for (i = 0; i < req->r_num_ops; i++) {
3862 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3863 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3864 req->r_ops[i].rval = m.rval[i];
3865 req->r_ops[i].outdata_len = m.outdata_len[i];
3866 data_len += m.outdata_len[i];
3867 }
3868 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3869 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3870 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3871 goto fail_request;
3872 }
3873 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3874 req, req->r_tid, m.result, data_len);
3875
3876 /*
3877 * Since we only ever request ONDISK, we should only ever get
3878 * one (type of) reply back.
3879 */
3880 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3881 req->r_version = m.user_version;
3882 req->r_result = m.result ?: data_len;
3883 finish_request(req);
3884 mutex_unlock(&osd->lock);
3885 up_read(&osdc->lock);
3886
3887 __complete_request(req);
3888 return;
3889
3890 fail_request:
3891 complete_request(req, -EIO);
3892 out_unlock_session:
3893 mutex_unlock(&osd->lock);
3894 out_unlock_osdc:
3895 up_read(&osdc->lock);
3896 }
3897
3898 static void set_pool_was_full(struct ceph_osd_client *osdc)
3899 {
3900 struct rb_node *n;
3901
3902 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3903 struct ceph_pg_pool_info *pi =
3904 rb_entry(n, struct ceph_pg_pool_info, node);
3905
3906 pi->was_full = __pool_full(pi);
3907 }
3908 }
3909
3910 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
3911 {
3912 struct ceph_pg_pool_info *pi;
3913
3914 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3915 if (!pi)
3916 return false;
3917
3918 return pi->was_full && !__pool_full(pi);
3919 }
3920
3921 static enum calc_target_result
3922 recalc_linger_target(struct ceph_osd_linger_request *lreq)
3923 {
3924 struct ceph_osd_client *osdc = lreq->osdc;
3925 enum calc_target_result ct_res;
3926
3927 ct_res = calc_target(osdc, &lreq->t, true);
3928 if (ct_res == CALC_TARGET_NEED_RESEND) {
3929 struct ceph_osd *osd;
3930
3931 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3932 if (osd != lreq->osd) {
3933 unlink_linger(lreq->osd, lreq);
3934 link_linger(osd, lreq);
3935 }
3936 }
3937
3938 return ct_res;
3939 }
3940
3941 /*
3942 * Requeue requests whose mapping to an OSD has changed.
3943 */
3944 static void scan_requests(struct ceph_osd *osd,
3945 bool force_resend,
3946 bool cleared_full,
3947 bool check_pool_cleared_full,
3948 struct rb_root *need_resend,
3949 struct list_head *need_resend_linger)
3950 {
3951 struct ceph_osd_client *osdc = osd->o_osdc;
3952 struct rb_node *n;
3953 bool force_resend_writes;
3954
3955 for (n = rb_first(&osd->o_linger_requests); n; ) {
3956 struct ceph_osd_linger_request *lreq =
3957 rb_entry(n, struct ceph_osd_linger_request, node);
3958 enum calc_target_result ct_res;
3959
3960 n = rb_next(n); /* recalc_linger_target() */
3961
3962 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3963 lreq->linger_id);
3964 ct_res = recalc_linger_target(lreq);
3965 switch (ct_res) {
3966 case CALC_TARGET_NO_ACTION:
3967 force_resend_writes = cleared_full ||
3968 (check_pool_cleared_full &&
3969 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3970 if (!force_resend && !force_resend_writes)
3971 break;
3972
3973 fallthrough;
3974 case CALC_TARGET_NEED_RESEND:
3975 cancel_linger_map_check(lreq);
3976 /*
3977 * scan_requests() for the previous epoch(s)
3978 * may have already added it to the list, since
3979 * it's not unlinked here.
3980 */
3981 if (list_empty(&lreq->scan_item))
3982 list_add_tail(&lreq->scan_item, need_resend_linger);
3983 break;
3984 case CALC_TARGET_POOL_DNE:
3985 list_del_init(&lreq->scan_item);
3986 check_linger_pool_dne(lreq);
3987 break;
3988 }
3989 }
3990
3991 for (n = rb_first(&osd->o_requests); n; ) {
3992 struct ceph_osd_request *req =
3993 rb_entry(n, struct ceph_osd_request, r_node);
3994 enum calc_target_result ct_res;
3995
3996 n = rb_next(n); /* unlink_request(), check_pool_dne() */
3997
3998 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3999 ct_res = calc_target(osdc, &req->r_t, false);
4000 switch (ct_res) {
4001 case CALC_TARGET_NO_ACTION:
4002 force_resend_writes = cleared_full ||
4003 (check_pool_cleared_full &&
4004 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
4005 if (!force_resend &&
4006 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
4007 !force_resend_writes))
4008 break;
4009
4010 fallthrough;
4011 case CALC_TARGET_NEED_RESEND:
4012 cancel_map_check(req);
4013 unlink_request(osd, req);
4014 insert_request(need_resend, req);
4015 break;
4016 case CALC_TARGET_POOL_DNE:
4017 check_pool_dne(req);
4018 break;
4019 }
4020 }
4021 }
4022
4023 static int handle_one_map(struct ceph_osd_client *osdc,
4024 void *p, void *end, bool incremental,
4025 struct rb_root *need_resend,
4026 struct list_head *need_resend_linger)
4027 {
4028 struct ceph_osdmap *newmap;
4029 struct rb_node *n;
4030 bool skipped_map = false;
4031 bool was_full;
4032
4033 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
4034 set_pool_was_full(osdc);
4035
4036 if (incremental)
4037 newmap = osdmap_apply_incremental(&p, end,
4038 ceph_msgr2(osdc->client),
4039 osdc->osdmap);
4040 else
4041 newmap = ceph_osdmap_decode(&p, end, ceph_msgr2(osdc->client));
4042 if (IS_ERR(newmap))
4043 return PTR_ERR(newmap);
4044
4045 if (newmap != osdc->osdmap) {
4046 /*
4047 * Preserve ->was_full before destroying the old map.
4048 * For pools that weren't in the old map, ->was_full
4049 * should be false.
4050 */
4051 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
4052 struct ceph_pg_pool_info *pi =
4053 rb_entry(n, struct ceph_pg_pool_info, node);
4054 struct ceph_pg_pool_info *old_pi;
4055
4056 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
4057 if (old_pi)
4058 pi->was_full = old_pi->was_full;
4059 else
4060 WARN_ON(pi->was_full);
4061 }
4062
4063 if (osdc->osdmap->epoch &&
4064 osdc->osdmap->epoch + 1 < newmap->epoch) {
4065 WARN_ON(incremental);
4066 skipped_map = true;
4067 }
4068
4069 ceph_osdmap_destroy(osdc->osdmap);
4070 osdc->osdmap = newmap;
4071 }
4072
4073 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
4074 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
4075 need_resend, need_resend_linger);
4076
4077 for (n = rb_first(&osdc->osds); n; ) {
4078 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4079
4080 n = rb_next(n); /* close_osd() */
4081
4082 scan_requests(osd, skipped_map, was_full, true, need_resend,
4083 need_resend_linger);
4084 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
4085 memcmp(&osd->o_con.peer_addr,
4086 ceph_osd_addr(osdc->osdmap, osd->o_osd),
4087 sizeof(struct ceph_entity_addr)))
4088 close_osd(osd);
4089 }
4090
4091 return 0;
4092 }
4093
4094 static void kick_requests(struct ceph_osd_client *osdc,
4095 struct rb_root *need_resend,
4096 struct list_head *need_resend_linger)
4097 {
4098 struct ceph_osd_linger_request *lreq, *nlreq;
4099 enum calc_target_result ct_res;
4100 struct rb_node *n;
4101
4102 /* make sure need_resend targets reflect latest map */
4103 for (n = rb_first(need_resend); n; ) {
4104 struct ceph_osd_request *req =
4105 rb_entry(n, struct ceph_osd_request, r_node);
4106
4107 n = rb_next(n);
4108
4109 if (req->r_t.epoch < osdc->osdmap->epoch) {
4110 ct_res = calc_target(osdc, &req->r_t, false);
4111 if (ct_res == CALC_TARGET_POOL_DNE) {
4112 erase_request(need_resend, req);
4113 check_pool_dne(req);
4114 }
4115 }
4116 }
4117
4118 for (n = rb_first(need_resend); n; ) {
4119 struct ceph_osd_request *req =
4120 rb_entry(n, struct ceph_osd_request, r_node);
4121 struct ceph_osd *osd;
4122
4123 n = rb_next(n);
4124 erase_request(need_resend, req); /* before link_request() */
4125
4126 osd = lookup_create_osd(osdc, req->r_t.osd, true);
4127 link_request(osd, req);
4128 if (!req->r_linger) {
4129 if (!osd_homeless(osd) && !req->r_t.paused)
4130 send_request(req);
4131 } else {
4132 cancel_linger_request(req);
4133 }
4134 }
4135
4136 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
4137 if (!osd_homeless(lreq->osd))
4138 send_linger(lreq);
4139
4140 list_del_init(&lreq->scan_item);
4141 }
4142 }
4143
4144 /*
4145 * Process updated osd map.
4146 *
4147 * The message contains any number of incremental and full maps, normally
4148 * indicating some sort of topology change in the cluster. Kick requests
4149 * off to different OSDs as needed.
4150 */
4151 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
4152 {
4153 void *p = msg->front.iov_base;
4154 void *const end = p + msg->front.iov_len;
4155 u32 nr_maps, maplen;
4156 u32 epoch;
4157 struct ceph_fsid fsid;
4158 struct rb_root need_resend = RB_ROOT;
4159 LIST_HEAD(need_resend_linger);
4160 bool handled_incremental = false;
4161 bool was_pauserd, was_pausewr;
4162 bool pauserd, pausewr;
4163 int err;
4164
4165 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
4166 down_write(&osdc->lock);
4167
4168 /* verify fsid */
4169 ceph_decode_need(&p, end, sizeof(fsid), bad);
4170 ceph_decode_copy(&p, &fsid, sizeof(fsid));
4171 if (ceph_check_fsid(osdc->client, &fsid) < 0)
4172 goto bad;
4173
4174 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4175 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4176 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4177 have_pool_full(osdc);
4178
4179 /* incremental maps */
4180 ceph_decode_32_safe(&p, end, nr_maps, bad);
4181 dout(" %d inc maps\n", nr_maps);
4182 while (nr_maps > 0) {
4183 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4184 epoch = ceph_decode_32(&p);
4185 maplen = ceph_decode_32(&p);
4186 ceph_decode_need(&p, end, maplen, bad);
4187 if (osdc->osdmap->epoch &&
4188 osdc->osdmap->epoch + 1 == epoch) {
4189 dout("applying incremental map %u len %d\n",
4190 epoch, maplen);
4191 err = handle_one_map(osdc, p, p + maplen, true,
4192 &need_resend, &need_resend_linger);
4193 if (err)
4194 goto bad;
4195 handled_incremental = true;
4196 } else {
4197 dout("ignoring incremental map %u len %d\n",
4198 epoch, maplen);
4199 }
4200 p += maplen;
4201 nr_maps--;
4202 }
4203 if (handled_incremental)
4204 goto done;
4205
4206 /* full maps */
4207 ceph_decode_32_safe(&p, end, nr_maps, bad);
4208 dout(" %d full maps\n", nr_maps);
4209 while (nr_maps) {
4210 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4211 epoch = ceph_decode_32(&p);
4212 maplen = ceph_decode_32(&p);
4213 ceph_decode_need(&p, end, maplen, bad);
4214 if (nr_maps > 1) {
4215 dout("skipping non-latest full map %u len %d\n",
4216 epoch, maplen);
4217 } else if (osdc->osdmap->epoch >= epoch) {
4218 dout("skipping full map %u len %d, "
4219 "older than our %u\n", epoch, maplen,
4220 osdc->osdmap->epoch);
4221 } else {
4222 dout("taking full map %u len %d\n", epoch, maplen);
4223 err = handle_one_map(osdc, p, p + maplen, false,
4224 &need_resend, &need_resend_linger);
4225 if (err)
4226 goto bad;
4227 }
4228 p += maplen;
4229 nr_maps--;
4230 }
4231
4232 done:
4233 /*
4234 * subscribe to subsequent osdmap updates if full to ensure
4235 * we find out when we are no longer full and stop returning
4236 * ENOSPC.
4237 */
4238 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4239 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4240 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4241 have_pool_full(osdc);
4242 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4243 osdc->osdmap->epoch < osdc->epoch_barrier)
4244 maybe_request_map(osdc);
4245
4246 kick_requests(osdc, &need_resend, &need_resend_linger);
4247
4248 ceph_osdc_abort_on_full(osdc);
4249 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4250 osdc->osdmap->epoch);
4251 up_write(&osdc->lock);
4252 wake_up_all(&osdc->client->auth_wq);
4253 return;
4254
4255 bad:
4256 pr_err("osdc handle_map corrupt msg\n");
4257 ceph_msg_dump(msg);
4258 up_write(&osdc->lock);
4259 }
4260
4261 /*
4262 * Resubmit requests pending on the given osd.
4263 */
4264 static void kick_osd_requests(struct ceph_osd *osd)
4265 {
4266 struct rb_node *n;
4267
4268 clear_backoffs(osd);
4269
4270 for (n = rb_first(&osd->o_requests); n; ) {
4271 struct ceph_osd_request *req =
4272 rb_entry(n, struct ceph_osd_request, r_node);
4273
4274 n = rb_next(n); /* cancel_linger_request() */
4275
4276 if (!req->r_linger) {
4277 if (!req->r_t.paused)
4278 send_request(req);
4279 } else {
4280 cancel_linger_request(req);
4281 }
4282 }
4283 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4284 struct ceph_osd_linger_request *lreq =
4285 rb_entry(n, struct ceph_osd_linger_request, node);
4286
4287 send_linger(lreq);
4288 }
4289 }
4290
4291 /*
4292 * If the osd connection drops, we need to resubmit all requests.
4293 */
4294 static void osd_fault(struct ceph_connection *con)
4295 {
4296 struct ceph_osd *osd = con->private;
4297 struct ceph_osd_client *osdc = osd->o_osdc;
4298
4299 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4300
4301 down_write(&osdc->lock);
4302 if (!osd_registered(osd)) {
4303 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4304 goto out_unlock;
4305 }
4306
4307 if (!reopen_osd(osd))
4308 kick_osd_requests(osd);
4309 maybe_request_map(osdc);
4310
4311 out_unlock:
4312 up_write(&osdc->lock);
4313 }
4314
4315 struct MOSDBackoff {
4316 struct ceph_spg spgid;
4317 u32 map_epoch;
4318 u8 op;
4319 u64 id;
4320 struct ceph_hobject_id *begin;
4321 struct ceph_hobject_id *end;
4322 };
4323
4324 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4325 {
4326 void *p = msg->front.iov_base;
4327 void *const end = p + msg->front.iov_len;
4328 u8 struct_v;
4329 u32 struct_len;
4330 int ret;
4331
4332 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4333 if (ret)
4334 return ret;
4335
4336 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4337 if (ret)
4338 return ret;
4339
4340 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4341 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4342 ceph_decode_8_safe(&p, end, m->op, e_inval);
4343 ceph_decode_64_safe(&p, end, m->id, e_inval);
4344
4345 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4346 if (!m->begin)
4347 return -ENOMEM;
4348
4349 ret = decode_hoid(&p, end, m->begin);
4350 if (ret) {
4351 free_hoid(m->begin);
4352 return ret;
4353 }
4354
4355 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4356 if (!m->end) {
4357 free_hoid(m->begin);
4358 return -ENOMEM;
4359 }
4360
4361 ret = decode_hoid(&p, end, m->end);
4362 if (ret) {
4363 free_hoid(m->begin);
4364 free_hoid(m->end);
4365 return ret;
4366 }
4367
4368 return 0;
4369
4370 e_inval:
4371 return -EINVAL;
4372 }
4373
4374 static struct ceph_msg *create_backoff_message(
4375 const struct ceph_osd_backoff *backoff,
4376 u32 map_epoch)
4377 {
4378 struct ceph_msg *msg;
4379 void *p, *end;
4380 int msg_size;
4381
4382 msg_size = CEPH_ENCODING_START_BLK_LEN +
4383 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4384 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4385 msg_size += CEPH_ENCODING_START_BLK_LEN +
4386 hoid_encoding_size(backoff->begin);
4387 msg_size += CEPH_ENCODING_START_BLK_LEN +
4388 hoid_encoding_size(backoff->end);
4389
4390 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4391 if (!msg)
4392 return NULL;
4393
4394 p = msg->front.iov_base;
4395 end = p + msg->front_alloc_len;
4396
4397 encode_spgid(&p, &backoff->spgid);
4398 ceph_encode_32(&p, map_epoch);
4399 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4400 ceph_encode_64(&p, backoff->id);
4401 encode_hoid(&p, end, backoff->begin);
4402 encode_hoid(&p, end, backoff->end);
4403 BUG_ON(p != end);
4404
4405 msg->front.iov_len = p - msg->front.iov_base;
4406 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4407 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4408
4409 return msg;
4410 }
4411
4412 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4413 {
4414 struct ceph_spg_mapping *spg;
4415 struct ceph_osd_backoff *backoff;
4416 struct ceph_msg *msg;
4417
4418 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4419 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4420
4421 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4422 if (!spg) {
4423 spg = alloc_spg_mapping();
4424 if (!spg) {
4425 pr_err("%s failed to allocate spg\n", __func__);
4426 return;
4427 }
4428 spg->spgid = m->spgid; /* struct */
4429 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4430 }
4431
4432 backoff = alloc_backoff();
4433 if (!backoff) {
4434 pr_err("%s failed to allocate backoff\n", __func__);
4435 return;
4436 }
4437 backoff->spgid = m->spgid; /* struct */
4438 backoff->id = m->id;
4439 backoff->begin = m->begin;
4440 m->begin = NULL; /* backoff now owns this */
4441 backoff->end = m->end;
4442 m->end = NULL; /* ditto */
4443
4444 insert_backoff(&spg->backoffs, backoff);
4445 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4446
4447 /*
4448 * Ack with original backoff's epoch so that the OSD can
4449 * discard this if there was a PG split.
4450 */
4451 msg = create_backoff_message(backoff, m->map_epoch);
4452 if (!msg) {
4453 pr_err("%s failed to allocate msg\n", __func__);
4454 return;
4455 }
4456 ceph_con_send(&osd->o_con, msg);
4457 }
4458
4459 static bool target_contained_by(const struct ceph_osd_request_target *t,
4460 const struct ceph_hobject_id *begin,
4461 const struct ceph_hobject_id *end)
4462 {
4463 struct ceph_hobject_id hoid;
4464 int cmp;
4465
4466 hoid_fill_from_target(&hoid, t);
4467 cmp = hoid_compare(&hoid, begin);
4468 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4469 }
4470
4471 static void handle_backoff_unblock(struct ceph_osd *osd,
4472 const struct MOSDBackoff *m)
4473 {
4474 struct ceph_spg_mapping *spg;
4475 struct ceph_osd_backoff *backoff;
4476 struct rb_node *n;
4477
4478 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4479 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4480
4481 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4482 if (!backoff) {
4483 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4484 __func__, osd->o_osd, m->spgid.pgid.pool,
4485 m->spgid.pgid.seed, m->spgid.shard, m->id);
4486 return;
4487 }
4488
4489 if (hoid_compare(backoff->begin, m->begin) &&
4490 hoid_compare(backoff->end, m->end)) {
4491 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4492 __func__, osd->o_osd, m->spgid.pgid.pool,
4493 m->spgid.pgid.seed, m->spgid.shard, m->id);
4494 /* unblock it anyway... */
4495 }
4496
4497 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4498 BUG_ON(!spg);
4499
4500 erase_backoff(&spg->backoffs, backoff);
4501 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4502 free_backoff(backoff);
4503
4504 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4505 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4506 free_spg_mapping(spg);
4507 }
4508
4509 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4510 struct ceph_osd_request *req =
4511 rb_entry(n, struct ceph_osd_request, r_node);
4512
4513 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4514 /*
4515 * Match against @m, not @backoff -- the PG may
4516 * have split on the OSD.
4517 */
4518 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4519 /*
4520 * If no other installed backoff applies,
4521 * resend.
4522 */
4523 send_request(req);
4524 }
4525 }
4526 }
4527 }
4528
4529 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4530 {
4531 struct ceph_osd_client *osdc = osd->o_osdc;
4532 struct MOSDBackoff m;
4533 int ret;
4534
4535 down_read(&osdc->lock);
4536 if (!osd_registered(osd)) {
4537 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4538 up_read(&osdc->lock);
4539 return;
4540 }
4541 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4542
4543 mutex_lock(&osd->lock);
4544 ret = decode_MOSDBackoff(msg, &m);
4545 if (ret) {
4546 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4547 ceph_msg_dump(msg);
4548 goto out_unlock;
4549 }
4550
4551 switch (m.op) {
4552 case CEPH_OSD_BACKOFF_OP_BLOCK:
4553 handle_backoff_block(osd, &m);
4554 break;
4555 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4556 handle_backoff_unblock(osd, &m);
4557 break;
4558 default:
4559 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4560 }
4561
4562 free_hoid(m.begin);
4563 free_hoid(m.end);
4564
4565 out_unlock:
4566 mutex_unlock(&osd->lock);
4567 up_read(&osdc->lock);
4568 }
4569
4570 /*
4571 * Process osd watch notifications
4572 */
4573 static void handle_watch_notify(struct ceph_osd_client *osdc,
4574 struct ceph_msg *msg)
4575 {
4576 void *p = msg->front.iov_base;
4577 void *const end = p + msg->front.iov_len;
4578 struct ceph_osd_linger_request *lreq;
4579 struct linger_work *lwork;
4580 u8 proto_ver, opcode;
4581 u64 cookie, notify_id;
4582 u64 notifier_id = 0;
4583 s32 return_code = 0;
4584 void *payload = NULL;
4585 u32 payload_len = 0;
4586
4587 ceph_decode_8_safe(&p, end, proto_ver, bad);
4588 ceph_decode_8_safe(&p, end, opcode, bad);
4589 ceph_decode_64_safe(&p, end, cookie, bad);
4590 p += 8; /* skip ver */
4591 ceph_decode_64_safe(&p, end, notify_id, bad);
4592
4593 if (proto_ver >= 1) {
4594 ceph_decode_32_safe(&p, end, payload_len, bad);
4595 ceph_decode_need(&p, end, payload_len, bad);
4596 payload = p;
4597 p += payload_len;
4598 }
4599
4600 if (le16_to_cpu(msg->hdr.version) >= 2)
4601 ceph_decode_32_safe(&p, end, return_code, bad);
4602
4603 if (le16_to_cpu(msg->hdr.version) >= 3)
4604 ceph_decode_64_safe(&p, end, notifier_id, bad);
4605
4606 down_read(&osdc->lock);
4607 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4608 if (!lreq) {
4609 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4610 cookie);
4611 goto out_unlock_osdc;
4612 }
4613
4614 mutex_lock(&lreq->lock);
4615 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4616 opcode, cookie, lreq, lreq->is_watch);
4617 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4618 if (!lreq->last_error) {
4619 lreq->last_error = -ENOTCONN;
4620 queue_watch_error(lreq);
4621 }
4622 } else if (!lreq->is_watch) {
4623 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4624 if (lreq->notify_id && lreq->notify_id != notify_id) {
4625 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4626 lreq->notify_id, notify_id);
4627 } else if (!completion_done(&lreq->notify_finish_wait)) {
4628 struct ceph_msg_data *data =
4629 msg->num_data_items ? &msg->data[0] : NULL;
4630
4631 if (data) {
4632 if (lreq->preply_pages) {
4633 WARN_ON(data->type !=
4634 CEPH_MSG_DATA_PAGES);
4635 *lreq->preply_pages = data->pages;
4636 *lreq->preply_len = data->length;
4637 data->own_pages = false;
4638 }
4639 }
4640 lreq->notify_finish_error = return_code;
4641 complete_all(&lreq->notify_finish_wait);
4642 }
4643 } else {
4644 /* CEPH_WATCH_EVENT_NOTIFY */
4645 lwork = lwork_alloc(lreq, do_watch_notify);
4646 if (!lwork) {
4647 pr_err("failed to allocate notify-lwork\n");
4648 goto out_unlock_lreq;
4649 }
4650
4651 lwork->notify.notify_id = notify_id;
4652 lwork->notify.notifier_id = notifier_id;
4653 lwork->notify.payload = payload;
4654 lwork->notify.payload_len = payload_len;
4655 lwork->notify.msg = ceph_msg_get(msg);
4656 lwork_queue(lwork);
4657 }
4658
4659 out_unlock_lreq:
4660 mutex_unlock(&lreq->lock);
4661 out_unlock_osdc:
4662 up_read(&osdc->lock);
4663 return;
4664
4665 bad:
4666 pr_err("osdc handle_watch_notify corrupt msg\n");
4667 }
4668
4669 /*
4670 * Register request, send initial attempt.
4671 */
4672 void ceph_osdc_start_request(struct ceph_osd_client *osdc,
4673 struct ceph_osd_request *req)
4674 {
4675 down_read(&osdc->lock);
4676 submit_request(req, false);
4677 up_read(&osdc->lock);
4678 }
4679 EXPORT_SYMBOL(ceph_osdc_start_request);
4680
4681 /*
4682 * Unregister request. If @req was registered, it isn't completed:
4683 * r_result isn't set and __complete_request() isn't invoked.
4684 *
4685 * If @req wasn't registered, this call may have raced with
4686 * handle_reply(), in which case r_result would already be set and
4687 * __complete_request() would be getting invoked, possibly even
4688 * concurrently with this call.
4689 */
4690 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4691 {
4692 struct ceph_osd_client *osdc = req->r_osdc;
4693
4694 down_write(&osdc->lock);
4695 if (req->r_osd)
4696 cancel_request(req);
4697 up_write(&osdc->lock);
4698 }
4699 EXPORT_SYMBOL(ceph_osdc_cancel_request);
4700
4701 /*
4702 * @timeout: in jiffies, 0 means "wait forever"
4703 */
4704 static int wait_request_timeout(struct ceph_osd_request *req,
4705 unsigned long timeout)
4706 {
4707 long left;
4708
4709 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4710 left = wait_for_completion_killable_timeout(&req->r_completion,
4711 ceph_timeout_jiffies(timeout));
4712 if (left <= 0) {
4713 left = left ?: -ETIMEDOUT;
4714 ceph_osdc_cancel_request(req);
4715 } else {
4716 left = req->r_result; /* completed */
4717 }
4718
4719 return left;
4720 }
4721
4722 /*
4723 * wait for a request to complete
4724 */
4725 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4726 struct ceph_osd_request *req)
4727 {
4728 return wait_request_timeout(req, 0);
4729 }
4730 EXPORT_SYMBOL(ceph_osdc_wait_request);
4731
4732 /*
4733 * sync - wait for all in-flight requests to flush. avoid starvation.
4734 */
4735 void ceph_osdc_sync(struct ceph_osd_client *osdc)
4736 {
4737 struct rb_node *n, *p;
4738 u64 last_tid = atomic64_read(&osdc->last_tid);
4739
4740 again:
4741 down_read(&osdc->lock);
4742 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4743 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4744
4745 mutex_lock(&osd->lock);
4746 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4747 struct ceph_osd_request *req =
4748 rb_entry(p, struct ceph_osd_request, r_node);
4749
4750 if (req->r_tid > last_tid)
4751 break;
4752
4753 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4754 continue;
4755
4756 ceph_osdc_get_request(req);
4757 mutex_unlock(&osd->lock);
4758 up_read(&osdc->lock);
4759 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4760 __func__, req, req->r_tid, last_tid);
4761 wait_for_completion(&req->r_completion);
4762 ceph_osdc_put_request(req);
4763 goto again;
4764 }
4765
4766 mutex_unlock(&osd->lock);
4767 }
4768
4769 up_read(&osdc->lock);
4770 dout("%s done last_tid %llu\n", __func__, last_tid);
4771 }
4772 EXPORT_SYMBOL(ceph_osdc_sync);
4773
4774 /*
4775 * Returns a handle, caller owns a ref.
4776 */
4777 struct ceph_osd_linger_request *
4778 ceph_osdc_watch(struct ceph_osd_client *osdc,
4779 struct ceph_object_id *oid,
4780 struct ceph_object_locator *oloc,
4781 rados_watchcb2_t wcb,
4782 rados_watcherrcb_t errcb,
4783 void *data)
4784 {
4785 struct ceph_osd_linger_request *lreq;
4786 int ret;
4787
4788 lreq = linger_alloc(osdc);
4789 if (!lreq)
4790 return ERR_PTR(-ENOMEM);
4791
4792 lreq->is_watch = true;
4793 lreq->wcb = wcb;
4794 lreq->errcb = errcb;
4795 lreq->data = data;
4796 lreq->watch_valid_thru = jiffies;
4797
4798 ceph_oid_copy(&lreq->t.base_oid, oid);
4799 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4800 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4801 ktime_get_real_ts64(&lreq->mtime);
4802
4803 linger_submit(lreq);
4804 ret = linger_reg_commit_wait(lreq);
4805 if (ret) {
4806 linger_cancel(lreq);
4807 goto err_put_lreq;
4808 }
4809
4810 return lreq;
4811
4812 err_put_lreq:
4813 linger_put(lreq);
4814 return ERR_PTR(ret);
4815 }
4816 EXPORT_SYMBOL(ceph_osdc_watch);
4817
4818 /*
4819 * Releases a ref.
4820 *
4821 * Times out after mount_timeout to preserve rbd unmap behaviour
4822 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4823 * with mount_timeout").
4824 */
4825 int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4826 struct ceph_osd_linger_request *lreq)
4827 {
4828 struct ceph_options *opts = osdc->client->options;
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, &lreq->t.base_oid);
4837 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4838 req->r_flags = CEPH_OSD_FLAG_WRITE;
4839 ktime_get_real_ts64(&req->r_mtime);
4840 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_UNWATCH,
4841 lreq->linger_id, 0);
4842
4843 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4844 if (ret)
4845 goto out_put_req;
4846
4847 ceph_osdc_start_request(osdc, req);
4848 linger_cancel(lreq);
4849 linger_put(lreq);
4850 ret = wait_request_timeout(req, opts->mount_timeout);
4851
4852 out_put_req:
4853 ceph_osdc_put_request(req);
4854 return ret;
4855 }
4856 EXPORT_SYMBOL(ceph_osdc_unwatch);
4857
4858 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4859 u64 notify_id, u64 cookie, void *payload,
4860 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_ACK, 0);
4867
4868 pl = ceph_pagelist_alloc(GFP_NOIO);
4869 if (!pl)
4870 return -ENOMEM;
4871
4872 ret = ceph_pagelist_encode_64(pl, notify_id);
4873 ret |= ceph_pagelist_encode_64(pl, cookie);
4874 if (payload) {
4875 ret |= ceph_pagelist_encode_32(pl, payload_len);
4876 ret |= ceph_pagelist_append(pl, payload, payload_len);
4877 } else {
4878 ret |= ceph_pagelist_encode_32(pl, 0);
4879 }
4880 if (ret) {
4881 ceph_pagelist_release(pl);
4882 return -ENOMEM;
4883 }
4884
4885 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4886 op->indata_len = pl->length;
4887 return 0;
4888 }
4889
4890 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4891 struct ceph_object_id *oid,
4892 struct ceph_object_locator *oloc,
4893 u64 notify_id,
4894 u64 cookie,
4895 void *payload,
4896 u32 payload_len)
4897 {
4898 struct ceph_osd_request *req;
4899 int ret;
4900
4901 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4902 if (!req)
4903 return -ENOMEM;
4904
4905 ceph_oid_copy(&req->r_base_oid, oid);
4906 ceph_oloc_copy(&req->r_base_oloc, oloc);
4907 req->r_flags = CEPH_OSD_FLAG_READ;
4908
4909 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4910 payload_len);
4911 if (ret)
4912 goto out_put_req;
4913
4914 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4915 if (ret)
4916 goto out_put_req;
4917
4918 ceph_osdc_start_request(osdc, req);
4919 ret = ceph_osdc_wait_request(osdc, req);
4920
4921 out_put_req:
4922 ceph_osdc_put_request(req);
4923 return ret;
4924 }
4925 EXPORT_SYMBOL(ceph_osdc_notify_ack);
4926
4927 /*
4928 * @timeout: in seconds
4929 *
4930 * @preply_{pages,len} are initialized both on success and error.
4931 * The caller is responsible for:
4932 *
4933 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4934 */
4935 int ceph_osdc_notify(struct ceph_osd_client *osdc,
4936 struct ceph_object_id *oid,
4937 struct ceph_object_locator *oloc,
4938 void *payload,
4939 u32 payload_len,
4940 u32 timeout,
4941 struct page ***preply_pages,
4942 size_t *preply_len)
4943 {
4944 struct ceph_osd_linger_request *lreq;
4945 int ret;
4946
4947 WARN_ON(!timeout);
4948 if (preply_pages) {
4949 *preply_pages = NULL;
4950 *preply_len = 0;
4951 }
4952
4953 lreq = linger_alloc(osdc);
4954 if (!lreq)
4955 return -ENOMEM;
4956
4957 lreq->request_pl = ceph_pagelist_alloc(GFP_NOIO);
4958 if (!lreq->request_pl) {
4959 ret = -ENOMEM;
4960 goto out_put_lreq;
4961 }
4962
4963 ret = ceph_pagelist_encode_32(lreq->request_pl, 1); /* prot_ver */
4964 ret |= ceph_pagelist_encode_32(lreq->request_pl, timeout);
4965 ret |= ceph_pagelist_encode_32(lreq->request_pl, payload_len);
4966 ret |= ceph_pagelist_append(lreq->request_pl, payload, payload_len);
4967 if (ret) {
4968 ret = -ENOMEM;
4969 goto out_put_lreq;
4970 }
4971
4972 /* for notify_id */
4973 lreq->notify_id_pages = ceph_alloc_page_vector(1, GFP_NOIO);
4974 if (IS_ERR(lreq->notify_id_pages)) {
4975 ret = PTR_ERR(lreq->notify_id_pages);
4976 lreq->notify_id_pages = NULL;
4977 goto out_put_lreq;
4978 }
4979
4980 lreq->preply_pages = preply_pages;
4981 lreq->preply_len = preply_len;
4982
4983 ceph_oid_copy(&lreq->t.base_oid, oid);
4984 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4985 lreq->t.flags = CEPH_OSD_FLAG_READ;
4986
4987 linger_submit(lreq);
4988 ret = linger_reg_commit_wait(lreq);
4989 if (!ret)
4990 ret = linger_notify_finish_wait(lreq,
4991 msecs_to_jiffies(2 * timeout * MSEC_PER_SEC));
4992 else
4993 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4994
4995 linger_cancel(lreq);
4996 out_put_lreq:
4997 linger_put(lreq);
4998 return ret;
4999 }
5000 EXPORT_SYMBOL(ceph_osdc_notify);
5001
5002 /*
5003 * Return the number of milliseconds since the watch was last
5004 * confirmed, or an error. If there is an error, the watch is no
5005 * longer valid, and should be destroyed with ceph_osdc_unwatch().
5006 */
5007 int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
5008 struct ceph_osd_linger_request *lreq)
5009 {
5010 unsigned long stamp, age;
5011 int ret;
5012
5013 down_read(&osdc->lock);
5014 mutex_lock(&lreq->lock);
5015 stamp = lreq->watch_valid_thru;
5016 if (!list_empty(&lreq->pending_lworks)) {
5017 struct linger_work *lwork =
5018 list_first_entry(&lreq->pending_lworks,
5019 struct linger_work,
5020 pending_item);
5021
5022 if (time_before(lwork->queued_stamp, stamp))
5023 stamp = lwork->queued_stamp;
5024 }
5025 age = jiffies - stamp;
5026 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
5027 lreq, lreq->linger_id, age, lreq->last_error);
5028 /* we are truncating to msecs, so return a safe upper bound */
5029 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
5030
5031 mutex_unlock(&lreq->lock);
5032 up_read(&osdc->lock);
5033 return ret;
5034 }
5035
5036 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
5037 {
5038 u8 struct_v;
5039 u32 struct_len;
5040 int ret;
5041
5042 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
5043 &struct_v, &struct_len);
5044 if (ret)
5045 goto bad;
5046
5047 ret = -EINVAL;
5048 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
5049 ceph_decode_64_safe(p, end, item->cookie, bad);
5050 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
5051
5052 if (struct_v >= 2) {
5053 ret = ceph_decode_entity_addr(p, end, &item->addr);
5054 if (ret)
5055 goto bad;
5056 } else {
5057 ret = 0;
5058 }
5059
5060 dout("%s %s%llu cookie %llu addr %s\n", __func__,
5061 ENTITY_NAME(item->name), item->cookie,
5062 ceph_pr_addr(&item->addr));
5063 bad:
5064 return ret;
5065 }
5066
5067 static int decode_watchers(void **p, void *end,
5068 struct ceph_watch_item **watchers,
5069 u32 *num_watchers)
5070 {
5071 u8 struct_v;
5072 u32 struct_len;
5073 int i;
5074 int ret;
5075
5076 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
5077 &struct_v, &struct_len);
5078 if (ret)
5079 return ret;
5080
5081 *num_watchers = ceph_decode_32(p);
5082 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
5083 if (!*watchers)
5084 return -ENOMEM;
5085
5086 for (i = 0; i < *num_watchers; i++) {
5087 ret = decode_watcher(p, end, *watchers + i);
5088 if (ret) {
5089 kfree(*watchers);
5090 return ret;
5091 }
5092 }
5093
5094 return 0;
5095 }
5096
5097 /*
5098 * On success, the caller is responsible for:
5099 *
5100 * kfree(watchers);
5101 */
5102 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
5103 struct ceph_object_id *oid,
5104 struct ceph_object_locator *oloc,
5105 struct ceph_watch_item **watchers,
5106 u32 *num_watchers)
5107 {
5108 struct ceph_osd_request *req;
5109 struct page **pages;
5110 int ret;
5111
5112 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5113 if (!req)
5114 return -ENOMEM;
5115
5116 ceph_oid_copy(&req->r_base_oid, oid);
5117 ceph_oloc_copy(&req->r_base_oloc, oloc);
5118 req->r_flags = CEPH_OSD_FLAG_READ;
5119
5120 pages = ceph_alloc_page_vector(1, GFP_NOIO);
5121 if (IS_ERR(pages)) {
5122 ret = PTR_ERR(pages);
5123 goto out_put_req;
5124 }
5125
5126 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
5127 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
5128 response_data),
5129 pages, PAGE_SIZE, 0, false, true);
5130
5131 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5132 if (ret)
5133 goto out_put_req;
5134
5135 ceph_osdc_start_request(osdc, req);
5136 ret = ceph_osdc_wait_request(osdc, req);
5137 if (ret >= 0) {
5138 void *p = page_address(pages[0]);
5139 void *const end = p + req->r_ops[0].outdata_len;
5140
5141 ret = decode_watchers(&p, end, watchers, num_watchers);
5142 }
5143
5144 out_put_req:
5145 ceph_osdc_put_request(req);
5146 return ret;
5147 }
5148 EXPORT_SYMBOL(ceph_osdc_list_watchers);
5149
5150 /*
5151 * Call all pending notify callbacks - for use after a watch is
5152 * unregistered, to make sure no more callbacks for it will be invoked
5153 */
5154 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
5155 {
5156 dout("%s osdc %p\n", __func__, osdc);
5157 flush_workqueue(osdc->notify_wq);
5158 }
5159 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5160
5161 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5162 {
5163 down_read(&osdc->lock);
5164 maybe_request_map(osdc);
5165 up_read(&osdc->lock);
5166 }
5167 EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
5168
5169 /*
5170 * Execute an OSD class method on an object.
5171 *
5172 * @flags: CEPH_OSD_FLAG_*
5173 * @resp_len: in/out param for reply length
5174 */
5175 int ceph_osdc_call(struct ceph_osd_client *osdc,
5176 struct ceph_object_id *oid,
5177 struct ceph_object_locator *oloc,
5178 const char *class, const char *method,
5179 unsigned int flags,
5180 struct page *req_page, size_t req_len,
5181 struct page **resp_pages, size_t *resp_len)
5182 {
5183 struct ceph_osd_request *req;
5184 int ret;
5185
5186 if (req_len > PAGE_SIZE)
5187 return -E2BIG;
5188
5189 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5190 if (!req)
5191 return -ENOMEM;
5192
5193 ceph_oid_copy(&req->r_base_oid, oid);
5194 ceph_oloc_copy(&req->r_base_oloc, oloc);
5195 req->r_flags = flags;
5196
5197 ret = osd_req_op_cls_init(req, 0, class, method);
5198 if (ret)
5199 goto out_put_req;
5200
5201 if (req_page)
5202 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5203 0, false, false);
5204 if (resp_pages)
5205 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
5206 *resp_len, 0, false, false);
5207
5208 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5209 if (ret)
5210 goto out_put_req;
5211
5212 ceph_osdc_start_request(osdc, req);
5213 ret = ceph_osdc_wait_request(osdc, req);
5214 if (ret >= 0) {
5215 ret = req->r_ops[0].rval;
5216 if (resp_pages)
5217 *resp_len = req->r_ops[0].outdata_len;
5218 }
5219
5220 out_put_req:
5221 ceph_osdc_put_request(req);
5222 return ret;
5223 }
5224 EXPORT_SYMBOL(ceph_osdc_call);
5225
5226 /*
5227 * reset all osd connections
5228 */
5229 void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc)
5230 {
5231 struct rb_node *n;
5232
5233 down_write(&osdc->lock);
5234 for (n = rb_first(&osdc->osds); n; ) {
5235 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
5236
5237 n = rb_next(n);
5238 if (!reopen_osd(osd))
5239 kick_osd_requests(osd);
5240 }
5241 up_write(&osdc->lock);
5242 }
5243
5244 /*
5245 * init, shutdown
5246 */
5247 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5248 {
5249 int err;
5250
5251 dout("init\n");
5252 osdc->client = client;
5253 init_rwsem(&osdc->lock);
5254 osdc->osds = RB_ROOT;
5255 INIT_LIST_HEAD(&osdc->osd_lru);
5256 spin_lock_init(&osdc->osd_lru_lock);
5257 osd_init(&osdc->homeless_osd);
5258 osdc->homeless_osd.o_osdc = osdc;
5259 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
5260 osdc->last_linger_id = CEPH_LINGER_ID_START;
5261 osdc->linger_requests = RB_ROOT;
5262 osdc->map_checks = RB_ROOT;
5263 osdc->linger_map_checks = RB_ROOT;
5264 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
5265 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5266
5267 err = -ENOMEM;
5268 osdc->osdmap = ceph_osdmap_alloc();
5269 if (!osdc->osdmap)
5270 goto out;
5271
5272 osdc->req_mempool = mempool_create_slab_pool(10,
5273 ceph_osd_request_cache);
5274 if (!osdc->req_mempool)
5275 goto out_map;
5276
5277 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
5278 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
5279 if (err < 0)
5280 goto out_mempool;
5281 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
5282 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5283 "osd_op_reply");
5284 if (err < 0)
5285 goto out_msgpool;
5286
5287 err = -ENOMEM;
5288 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
5289 if (!osdc->notify_wq)
5290 goto out_msgpool_reply;
5291
5292 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5293 if (!osdc->completion_wq)
5294 goto out_notify_wq;
5295
5296 schedule_delayed_work(&osdc->timeout_work,
5297 osdc->client->options->osd_keepalive_timeout);
5298 schedule_delayed_work(&osdc->osds_timeout_work,
5299 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5300
5301 return 0;
5302
5303 out_notify_wq:
5304 destroy_workqueue(osdc->notify_wq);
5305 out_msgpool_reply:
5306 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5307 out_msgpool:
5308 ceph_msgpool_destroy(&osdc->msgpool_op);
5309 out_mempool:
5310 mempool_destroy(osdc->req_mempool);
5311 out_map:
5312 ceph_osdmap_destroy(osdc->osdmap);
5313 out:
5314 return err;
5315 }
5316
5317 void ceph_osdc_stop(struct ceph_osd_client *osdc)
5318 {
5319 destroy_workqueue(osdc->completion_wq);
5320 destroy_workqueue(osdc->notify_wq);
5321 cancel_delayed_work_sync(&osdc->timeout_work);
5322 cancel_delayed_work_sync(&osdc->osds_timeout_work);
5323
5324 down_write(&osdc->lock);
5325 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5326 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5327 struct ceph_osd, o_node);
5328 close_osd(osd);
5329 }
5330 up_write(&osdc->lock);
5331 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5332 osd_cleanup(&osdc->homeless_osd);
5333
5334 WARN_ON(!list_empty(&osdc->osd_lru));
5335 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
5336 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5337 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5338 WARN_ON(atomic_read(&osdc->num_requests));
5339 WARN_ON(atomic_read(&osdc->num_homeless));
5340
5341 ceph_osdmap_destroy(osdc->osdmap);
5342 mempool_destroy(osdc->req_mempool);
5343 ceph_msgpool_destroy(&osdc->msgpool_op);
5344 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5345 }
5346
5347 int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5348 u64 src_snapid, u64 src_version,
5349 struct ceph_object_id *src_oid,
5350 struct ceph_object_locator *src_oloc,
5351 u32 src_fadvise_flags,
5352 u32 dst_fadvise_flags,
5353 u32 truncate_seq, u64 truncate_size,
5354 u8 copy_from_flags)
5355 {
5356 struct ceph_osd_req_op *op;
5357 struct page **pages;
5358 void *p, *end;
5359
5360 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5361 if (IS_ERR(pages))
5362 return PTR_ERR(pages);
5363
5364 op = osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2,
5365 dst_fadvise_flags);
5366 op->copy_from.snapid = src_snapid;
5367 op->copy_from.src_version = src_version;
5368 op->copy_from.flags = copy_from_flags;
5369 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5370
5371 p = page_address(pages[0]);
5372 end = p + PAGE_SIZE;
5373 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5374 encode_oloc(&p, end, src_oloc);
5375 ceph_encode_32(&p, truncate_seq);
5376 ceph_encode_64(&p, truncate_size);
5377 op->indata_len = PAGE_SIZE - (end - p);
5378
5379 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5380 op->indata_len, 0, false, true);
5381 return 0;
5382 }
5383 EXPORT_SYMBOL(osd_req_op_copy_from_init);
5384
5385 int __init ceph_osdc_setup(void)
5386 {
5387 size_t size = sizeof(struct ceph_osd_request) +
5388 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5389
5390 BUG_ON(ceph_osd_request_cache);
5391 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5392 0, 0, NULL);
5393
5394 return ceph_osd_request_cache ? 0 : -ENOMEM;
5395 }
5396
5397 void ceph_osdc_cleanup(void)
5398 {
5399 BUG_ON(!ceph_osd_request_cache);
5400 kmem_cache_destroy(ceph_osd_request_cache);
5401 ceph_osd_request_cache = NULL;
5402 }
5403
5404 /*
5405 * handle incoming message
5406 */
5407 static void osd_dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5408 {
5409 struct ceph_osd *osd = con->private;
5410 struct ceph_osd_client *osdc = osd->o_osdc;
5411 int type = le16_to_cpu(msg->hdr.type);
5412
5413 switch (type) {
5414 case CEPH_MSG_OSD_MAP:
5415 ceph_osdc_handle_map(osdc, msg);
5416 break;
5417 case CEPH_MSG_OSD_OPREPLY:
5418 handle_reply(osd, msg);
5419 break;
5420 case CEPH_MSG_OSD_BACKOFF:
5421 handle_backoff(osd, msg);
5422 break;
5423 case CEPH_MSG_WATCH_NOTIFY:
5424 handle_watch_notify(osdc, msg);
5425 break;
5426
5427 default:
5428 pr_err("received unknown message type %d %s\n", type,
5429 ceph_msg_type_name(type));
5430 }
5431
5432 ceph_msg_put(msg);
5433 }
5434
5435 /* How much sparse data was requested? */
5436 static u64 sparse_data_requested(struct ceph_osd_request *req)
5437 {
5438 u64 len = 0;
5439
5440 if (req->r_flags & CEPH_OSD_FLAG_READ) {
5441 int i;
5442
5443 for (i = 0; i < req->r_num_ops; ++i) {
5444 struct ceph_osd_req_op *op = &req->r_ops[i];
5445
5446 if (op->op == CEPH_OSD_OP_SPARSE_READ)
5447 len += op->extent.length;
5448 }
5449 }
5450 return len;
5451 }
5452
5453 /*
5454 * Lookup and return message for incoming reply. Don't try to do
5455 * anything about a larger than preallocated data portion of the
5456 * message at the moment - for now, just skip the message.
5457 */
5458 static struct ceph_msg *get_reply(struct ceph_connection *con,
5459 struct ceph_msg_header *hdr,
5460 int *skip)
5461 {
5462 struct ceph_osd *osd = con->private;
5463 struct ceph_osd_client *osdc = osd->o_osdc;
5464 struct ceph_msg *m = NULL;
5465 struct ceph_osd_request *req;
5466 int front_len = le32_to_cpu(hdr->front_len);
5467 int data_len = le32_to_cpu(hdr->data_len);
5468 u64 tid = le64_to_cpu(hdr->tid);
5469 u64 srlen;
5470
5471 down_read(&osdc->lock);
5472 if (!osd_registered(osd)) {
5473 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5474 *skip = 1;
5475 goto out_unlock_osdc;
5476 }
5477 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5478
5479 mutex_lock(&osd->lock);
5480 req = lookup_request(&osd->o_requests, tid);
5481 if (!req) {
5482 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5483 osd->o_osd, tid);
5484 *skip = 1;
5485 goto out_unlock_session;
5486 }
5487
5488 ceph_msg_revoke_incoming(req->r_reply);
5489
5490 if (front_len > req->r_reply->front_alloc_len) {
5491 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5492 __func__, osd->o_osd, req->r_tid, front_len,
5493 req->r_reply->front_alloc_len);
5494 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5495 false);
5496 if (!m)
5497 goto out_unlock_session;
5498 ceph_msg_put(req->r_reply);
5499 req->r_reply = m;
5500 }
5501
5502 srlen = sparse_data_requested(req);
5503 if (!srlen && data_len > req->r_reply->data_length) {
5504 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5505 __func__, osd->o_osd, req->r_tid, data_len,
5506 req->r_reply->data_length);
5507 m = NULL;
5508 *skip = 1;
5509 goto out_unlock_session;
5510 }
5511
5512 m = ceph_msg_get(req->r_reply);
5513 m->sparse_read_total = srlen;
5514
5515 dout("get_reply tid %lld %p\n", tid, m);
5516
5517 out_unlock_session:
5518 mutex_unlock(&osd->lock);
5519 out_unlock_osdc:
5520 up_read(&osdc->lock);
5521 return m;
5522 }
5523
5524 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5525 {
5526 struct ceph_msg *m;
5527 int type = le16_to_cpu(hdr->type);
5528 u32 front_len = le32_to_cpu(hdr->front_len);
5529 u32 data_len = le32_to_cpu(hdr->data_len);
5530
5531 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
5532 if (!m)
5533 return NULL;
5534
5535 if (data_len) {
5536 struct page **pages;
5537
5538 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5539 GFP_NOIO);
5540 if (IS_ERR(pages)) {
5541 ceph_msg_put(m);
5542 return NULL;
5543 }
5544
5545 ceph_msg_data_add_pages(m, pages, data_len, 0, true);
5546 }
5547
5548 return m;
5549 }
5550
5551 static struct ceph_msg *osd_alloc_msg(struct ceph_connection *con,
5552 struct ceph_msg_header *hdr,
5553 int *skip)
5554 {
5555 struct ceph_osd *osd = con->private;
5556 int type = le16_to_cpu(hdr->type);
5557
5558 *skip = 0;
5559 switch (type) {
5560 case CEPH_MSG_OSD_MAP:
5561 case CEPH_MSG_OSD_BACKOFF:
5562 case CEPH_MSG_WATCH_NOTIFY:
5563 return alloc_msg_with_page_vector(hdr);
5564 case CEPH_MSG_OSD_OPREPLY:
5565 return get_reply(con, hdr, skip);
5566 default:
5567 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5568 osd->o_osd, type);
5569 *skip = 1;
5570 return NULL;
5571 }
5572 }
5573
5574 /*
5575 * Wrappers to refcount containing ceph_osd struct
5576 */
5577 static struct ceph_connection *osd_get_con(struct ceph_connection *con)
5578 {
5579 struct ceph_osd *osd = con->private;
5580 if (get_osd(osd))
5581 return con;
5582 return NULL;
5583 }
5584
5585 static void osd_put_con(struct ceph_connection *con)
5586 {
5587 struct ceph_osd *osd = con->private;
5588 put_osd(osd);
5589 }
5590
5591 /*
5592 * authentication
5593 */
5594
5595 /*
5596 * Note: returned pointer is the address of a structure that's
5597 * managed separately. Caller must *not* attempt to free it.
5598 */
5599 static struct ceph_auth_handshake *
5600 osd_get_authorizer(struct ceph_connection *con, int *proto, int force_new)
5601 {
5602 struct ceph_osd *o = con->private;
5603 struct ceph_osd_client *osdc = o->o_osdc;
5604 struct ceph_auth_client *ac = osdc->client->monc.auth;
5605 struct ceph_auth_handshake *auth = &o->o_auth;
5606 int ret;
5607
5608 ret = __ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD,
5609 force_new, proto, NULL, NULL);
5610 if (ret)
5611 return ERR_PTR(ret);
5612
5613 return auth;
5614 }
5615
5616 static int osd_add_authorizer_challenge(struct ceph_connection *con,
5617 void *challenge_buf, int challenge_buf_len)
5618 {
5619 struct ceph_osd *o = con->private;
5620 struct ceph_osd_client *osdc = o->o_osdc;
5621 struct ceph_auth_client *ac = osdc->client->monc.auth;
5622
5623 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5624 challenge_buf, challenge_buf_len);
5625 }
5626
5627 static int osd_verify_authorizer_reply(struct ceph_connection *con)
5628 {
5629 struct ceph_osd *o = con->private;
5630 struct ceph_osd_client *osdc = o->o_osdc;
5631 struct ceph_auth_client *ac = osdc->client->monc.auth;
5632 struct ceph_auth_handshake *auth = &o->o_auth;
5633
5634 return ceph_auth_verify_authorizer_reply(ac, auth->authorizer,
5635 auth->authorizer_reply_buf, auth->authorizer_reply_buf_len,
5636 NULL, NULL, NULL, NULL);
5637 }
5638
5639 static int osd_invalidate_authorizer(struct ceph_connection *con)
5640 {
5641 struct ceph_osd *o = con->private;
5642 struct ceph_osd_client *osdc = o->o_osdc;
5643 struct ceph_auth_client *ac = osdc->client->monc.auth;
5644
5645 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5646 return ceph_monc_validate_auth(&osdc->client->monc);
5647 }
5648
5649 static int osd_get_auth_request(struct ceph_connection *con,
5650 void *buf, int *buf_len,
5651 void **authorizer, int *authorizer_len)
5652 {
5653 struct ceph_osd *o = con->private;
5654 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5655 struct ceph_auth_handshake *auth = &o->o_auth;
5656 int ret;
5657
5658 ret = ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD,
5659 buf, buf_len);
5660 if (ret)
5661 return ret;
5662
5663 *authorizer = auth->authorizer_buf;
5664 *authorizer_len = auth->authorizer_buf_len;
5665 return 0;
5666 }
5667
5668 static int osd_handle_auth_reply_more(struct ceph_connection *con,
5669 void *reply, int reply_len,
5670 void *buf, int *buf_len,
5671 void **authorizer, int *authorizer_len)
5672 {
5673 struct ceph_osd *o = con->private;
5674 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5675 struct ceph_auth_handshake *auth = &o->o_auth;
5676 int ret;
5677
5678 ret = ceph_auth_handle_svc_reply_more(ac, auth, reply, reply_len,
5679 buf, buf_len);
5680 if (ret)
5681 return ret;
5682
5683 *authorizer = auth->authorizer_buf;
5684 *authorizer_len = auth->authorizer_buf_len;
5685 return 0;
5686 }
5687
5688 static int osd_handle_auth_done(struct ceph_connection *con,
5689 u64 global_id, void *reply, int reply_len,
5690 u8 *session_key, int *session_key_len,
5691 u8 *con_secret, int *con_secret_len)
5692 {
5693 struct ceph_osd *o = con->private;
5694 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5695 struct ceph_auth_handshake *auth = &o->o_auth;
5696
5697 return ceph_auth_handle_svc_reply_done(ac, auth, reply, reply_len,
5698 session_key, session_key_len,
5699 con_secret, con_secret_len);
5700 }
5701
5702 static int osd_handle_auth_bad_method(struct ceph_connection *con,
5703 int used_proto, int result,
5704 const int *allowed_protos, int proto_cnt,
5705 const int *allowed_modes, int mode_cnt)
5706 {
5707 struct ceph_osd *o = con->private;
5708 struct ceph_mon_client *monc = &o->o_osdc->client->monc;
5709 int ret;
5710
5711 if (ceph_auth_handle_bad_authorizer(monc->auth, CEPH_ENTITY_TYPE_OSD,
5712 used_proto, result,
5713 allowed_protos, proto_cnt,
5714 allowed_modes, mode_cnt)) {
5715 ret = ceph_monc_validate_auth(monc);
5716 if (ret)
5717 return ret;
5718 }
5719
5720 return -EACCES;
5721 }
5722
5723 static void osd_reencode_message(struct ceph_msg *msg)
5724 {
5725 int type = le16_to_cpu(msg->hdr.type);
5726
5727 if (type == CEPH_MSG_OSD_OP)
5728 encode_request_finish(msg);
5729 }
5730
5731 static int osd_sign_message(struct ceph_msg *msg)
5732 {
5733 struct ceph_osd *o = msg->con->private;
5734 struct ceph_auth_handshake *auth = &o->o_auth;
5735
5736 return ceph_auth_sign_message(auth, msg);
5737 }
5738
5739 static int osd_check_message_signature(struct ceph_msg *msg)
5740 {
5741 struct ceph_osd *o = msg->con->private;
5742 struct ceph_auth_handshake *auth = &o->o_auth;
5743
5744 return ceph_auth_check_message_signature(auth, msg);
5745 }
5746
5747 static void advance_cursor(struct ceph_msg_data_cursor *cursor, size_t len,
5748 bool zero)
5749 {
5750 while (len) {
5751 struct page *page;
5752 size_t poff, plen;
5753
5754 page = ceph_msg_data_next(cursor, &poff, &plen);
5755 if (plen > len)
5756 plen = len;
5757 if (zero)
5758 zero_user_segment(page, poff, poff + plen);
5759 len -= plen;
5760 ceph_msg_data_advance(cursor, plen);
5761 }
5762 }
5763
5764 static int prep_next_sparse_read(struct ceph_connection *con,
5765 struct ceph_msg_data_cursor *cursor)
5766 {
5767 struct ceph_osd *o = con->private;
5768 struct ceph_sparse_read *sr = &o->o_sparse_read;
5769 struct ceph_osd_request *req;
5770 struct ceph_osd_req_op *op;
5771
5772 spin_lock(&o->o_requests_lock);
5773 req = lookup_request(&o->o_requests, le64_to_cpu(con->in_msg->hdr.tid));
5774 if (!req) {
5775 spin_unlock(&o->o_requests_lock);
5776 return -EBADR;
5777 }
5778
5779 if (o->o_sparse_op_idx < 0) {
5780 dout("%s: [%d] starting new sparse read req\n",
5781 __func__, o->o_osd);
5782 } else {
5783 u64 end;
5784
5785 op = &req->r_ops[o->o_sparse_op_idx];
5786
5787 WARN_ON_ONCE(op->extent.sparse_ext);
5788
5789 /* hand back buffer we took earlier */
5790 op->extent.sparse_ext = sr->sr_extent;
5791 sr->sr_extent = NULL;
5792 op->extent.sparse_ext_cnt = sr->sr_count;
5793 sr->sr_ext_len = 0;
5794 dout("%s: [%d] completed extent array len %d cursor->resid %zd\n",
5795 __func__, o->o_osd, op->extent.sparse_ext_cnt, cursor->resid);
5796 /* Advance to end of data for this operation */
5797 end = ceph_sparse_ext_map_end(op);
5798 if (end < sr->sr_req_len)
5799 advance_cursor(cursor, sr->sr_req_len - end, false);
5800 }
5801
5802 ceph_init_sparse_read(sr);
5803
5804 /* find next op in this request (if any) */
5805 while (++o->o_sparse_op_idx < req->r_num_ops) {
5806 op = &req->r_ops[o->o_sparse_op_idx];
5807 if (op->op == CEPH_OSD_OP_SPARSE_READ)
5808 goto found;
5809 }
5810
5811 /* reset for next sparse read request */
5812 spin_unlock(&o->o_requests_lock);
5813 o->o_sparse_op_idx = -1;
5814 return 0;
5815 found:
5816 sr->sr_req_off = op->extent.offset;
5817 sr->sr_req_len = op->extent.length;
5818 sr->sr_pos = sr->sr_req_off;
5819 dout("%s: [%d] new sparse read op at idx %d 0x%llx~0x%llx\n", __func__,
5820 o->o_osd, o->o_sparse_op_idx, sr->sr_req_off, sr->sr_req_len);
5821
5822 /* hand off request's sparse extent map buffer */
5823 sr->sr_ext_len = op->extent.sparse_ext_cnt;
5824 op->extent.sparse_ext_cnt = 0;
5825 sr->sr_extent = op->extent.sparse_ext;
5826 op->extent.sparse_ext = NULL;
5827
5828 spin_unlock(&o->o_requests_lock);
5829 return 1;
5830 }
5831
5832 #ifdef __BIG_ENDIAN
5833 static inline void convert_extent_map(struct ceph_sparse_read *sr)
5834 {
5835 int i;
5836
5837 for (i = 0; i < sr->sr_count; i++) {
5838 struct ceph_sparse_extent *ext = &sr->sr_extent[i];
5839
5840 ext->off = le64_to_cpu((__force __le64)ext->off);
5841 ext->len = le64_to_cpu((__force __le64)ext->len);
5842 }
5843 }
5844 #else
5845 static inline void convert_extent_map(struct ceph_sparse_read *sr)
5846 {
5847 }
5848 #endif
5849
5850 static int osd_sparse_read(struct ceph_connection *con,
5851 struct ceph_msg_data_cursor *cursor,
5852 char **pbuf)
5853 {
5854 struct ceph_osd *o = con->private;
5855 struct ceph_sparse_read *sr = &o->o_sparse_read;
5856 u32 count = sr->sr_count;
5857 u64 eoff, elen, len = 0;
5858 int i, ret;
5859
5860 switch (sr->sr_state) {
5861 case CEPH_SPARSE_READ_HDR:
5862 next_op:
5863 ret = prep_next_sparse_read(con, cursor);
5864 if (ret <= 0)
5865 return ret;
5866
5867 /* number of extents */
5868 ret = sizeof(sr->sr_count);
5869 *pbuf = (char *)&sr->sr_count;
5870 sr->sr_state = CEPH_SPARSE_READ_EXTENTS;
5871 break;
5872 case CEPH_SPARSE_READ_EXTENTS:
5873 /* Convert sr_count to host-endian */
5874 count = le32_to_cpu((__force __le32)sr->sr_count);
5875 sr->sr_count = count;
5876 dout("[%d] got %u extents\n", o->o_osd, count);
5877
5878 if (count > 0) {
5879 if (!sr->sr_extent || count > sr->sr_ext_len) {
5880 /* no extent array provided, or too short */
5881 kfree(sr->sr_extent);
5882 sr->sr_extent = kmalloc_array(count,
5883 sizeof(*sr->sr_extent),
5884 GFP_NOIO);
5885 if (!sr->sr_extent) {
5886 pr_err("%s: failed to allocate %u extents\n",
5887 __func__, count);
5888 return -ENOMEM;
5889 }
5890 sr->sr_ext_len = count;
5891 }
5892 ret = count * sizeof(*sr->sr_extent);
5893 *pbuf = (char *)sr->sr_extent;
5894 sr->sr_state = CEPH_SPARSE_READ_DATA_LEN;
5895 break;
5896 }
5897 /* No extents? Read data len */
5898 fallthrough;
5899 case CEPH_SPARSE_READ_DATA_LEN:
5900 convert_extent_map(sr);
5901 ret = sizeof(sr->sr_datalen);
5902 *pbuf = (char *)&sr->sr_datalen;
5903 sr->sr_state = CEPH_SPARSE_READ_DATA_PRE;
5904 break;
5905 case CEPH_SPARSE_READ_DATA_PRE:
5906 /* Convert sr_datalen to host-endian */
5907 sr->sr_datalen = le32_to_cpu((__force __le32)sr->sr_datalen);
5908 for (i = 0; i < count; i++)
5909 len += sr->sr_extent[i].len;
5910 if (sr->sr_datalen != len) {
5911 pr_warn_ratelimited("data len %u != extent len %llu\n",
5912 sr->sr_datalen, len);
5913 return -EREMOTEIO;
5914 }
5915 sr->sr_state = CEPH_SPARSE_READ_DATA;
5916 fallthrough;
5917 case CEPH_SPARSE_READ_DATA:
5918 if (sr->sr_index >= count) {
5919 sr->sr_state = CEPH_SPARSE_READ_HDR;
5920 goto next_op;
5921 }
5922
5923 eoff = sr->sr_extent[sr->sr_index].off;
5924 elen = sr->sr_extent[sr->sr_index].len;
5925
5926 dout("[%d] ext %d off 0x%llx len 0x%llx\n",
5927 o->o_osd, sr->sr_index, eoff, elen);
5928
5929 if (elen > INT_MAX) {
5930 dout("Sparse read extent length too long (0x%llx)\n",
5931 elen);
5932 return -EREMOTEIO;
5933 }
5934
5935 /* zero out anything from sr_pos to start of extent */
5936 if (sr->sr_pos < eoff)
5937 advance_cursor(cursor, eoff - sr->sr_pos, true);
5938
5939 /* Set position to end of extent */
5940 sr->sr_pos = eoff + elen;
5941
5942 /* send back the new length and nullify the ptr */
5943 cursor->sr_resid = elen;
5944 ret = elen;
5945 *pbuf = NULL;
5946
5947 /* Bump the array index */
5948 ++sr->sr_index;
5949 break;
5950 }
5951 return ret;
5952 }
5953
5954 static const struct ceph_connection_operations osd_con_ops = {
5955 .get = osd_get_con,
5956 .put = osd_put_con,
5957 .sparse_read = osd_sparse_read,
5958 .alloc_msg = osd_alloc_msg,
5959 .dispatch = osd_dispatch,
5960 .fault = osd_fault,
5961 .reencode_message = osd_reencode_message,
5962 .get_authorizer = osd_get_authorizer,
5963 .add_authorizer_challenge = osd_add_authorizer_challenge,
5964 .verify_authorizer_reply = osd_verify_authorizer_reply,
5965 .invalidate_authorizer = osd_invalidate_authorizer,
5966 .sign_message = osd_sign_message,
5967 .check_message_signature = osd_check_message_signature,
5968 .get_auth_request = osd_get_auth_request,
5969 .handle_auth_reply_more = osd_handle_auth_reply_more,
5970 .handle_auth_done = osd_handle_auth_done,
5971 .handle_auth_bad_method = osd_handle_auth_bad_method,
5972 };
5973
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