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tty: serial: lpuart: avoid leaking struct tty_struct
[linux/fpc-iii.git] / net / ceph / osd_client.c
blob60934bd8796c53c5ec96477e1c29fb9e8234e804
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 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
130 struct page **pages, u64 length, u32 alignment,
131 bool pages_from_pool, bool own_pages)
132 {
133 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
134 osd_data->pages = pages;
135 osd_data->length = length;
136 osd_data->alignment = alignment;
137 osd_data->pages_from_pool = pages_from_pool;
138 osd_data->own_pages = own_pages;
139 }
140
141 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
142 struct ceph_pagelist *pagelist)
143 {
144 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
145 osd_data->pagelist = pagelist;
146 }
147
148 #ifdef CONFIG_BLOCK
149 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
150 struct ceph_bio_iter *bio_pos,
151 u32 bio_length)
152 {
153 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
154 osd_data->bio_pos = *bio_pos;
155 osd_data->bio_length = bio_length;
156 }
157 #endif /* CONFIG_BLOCK */
158
159 static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
160 struct ceph_bvec_iter *bvec_pos,
161 u32 num_bvecs)
162 {
163 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
164 osd_data->bvec_pos = *bvec_pos;
165 osd_data->num_bvecs = num_bvecs;
166 }
167
168 #define osd_req_op_data(oreq, whch, typ, fld) \
169 ({ \
170 struct ceph_osd_request *__oreq = (oreq); \
171 unsigned int __whch = (whch); \
172 BUG_ON(__whch >= __oreq->r_num_ops); \
173 &__oreq->r_ops[__whch].typ.fld; \
174 })
175
176 static struct ceph_osd_data *
177 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
178 {
179 BUG_ON(which >= osd_req->r_num_ops);
180
181 return &osd_req->r_ops[which].raw_data_in;
182 }
183
184 struct ceph_osd_data *
185 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
186 unsigned int which)
187 {
188 return osd_req_op_data(osd_req, which, extent, osd_data);
189 }
190 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
191
192 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
193 unsigned int which, struct page **pages,
194 u64 length, u32 alignment,
195 bool pages_from_pool, bool own_pages)
196 {
197 struct ceph_osd_data *osd_data;
198
199 osd_data = osd_req_op_raw_data_in(osd_req, which);
200 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
201 pages_from_pool, own_pages);
202 }
203 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
204
205 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
206 unsigned int which, struct page **pages,
207 u64 length, u32 alignment,
208 bool pages_from_pool, bool own_pages)
209 {
210 struct ceph_osd_data *osd_data;
211
212 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
213 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
214 pages_from_pool, own_pages);
215 }
216 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
217
218 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
219 unsigned int which, struct ceph_pagelist *pagelist)
220 {
221 struct ceph_osd_data *osd_data;
222
223 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
224 ceph_osd_data_pagelist_init(osd_data, pagelist);
225 }
226 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
227
228 #ifdef CONFIG_BLOCK
229 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
230 unsigned int which,
231 struct ceph_bio_iter *bio_pos,
232 u32 bio_length)
233 {
234 struct ceph_osd_data *osd_data;
235
236 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
237 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
238 }
239 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
240 #endif /* CONFIG_BLOCK */
241
242 void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
243 unsigned int which,
244 struct bio_vec *bvecs, u32 num_bvecs,
245 u32 bytes)
246 {
247 struct ceph_osd_data *osd_data;
248 struct ceph_bvec_iter it = {
249 .bvecs = bvecs,
250 .iter = { .bi_size = bytes },
251 };
252
253 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
254 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
255 }
256 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
257
258 void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
259 unsigned int which,
260 struct ceph_bvec_iter *bvec_pos)
261 {
262 struct ceph_osd_data *osd_data;
263
264 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
265 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
266 }
267 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
268
269 static void osd_req_op_cls_request_info_pagelist(
270 struct ceph_osd_request *osd_req,
271 unsigned int which, struct ceph_pagelist *pagelist)
272 {
273 struct ceph_osd_data *osd_data;
274
275 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
276 ceph_osd_data_pagelist_init(osd_data, pagelist);
277 }
278
279 void osd_req_op_cls_request_data_pagelist(
280 struct ceph_osd_request *osd_req,
281 unsigned int which, struct ceph_pagelist *pagelist)
282 {
283 struct ceph_osd_data *osd_data;
284
285 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
286 ceph_osd_data_pagelist_init(osd_data, pagelist);
287 osd_req->r_ops[which].cls.indata_len += pagelist->length;
288 osd_req->r_ops[which].indata_len += pagelist->length;
289 }
290 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
291
292 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
293 unsigned int which, struct page **pages, u64 length,
294 u32 alignment, bool pages_from_pool, bool own_pages)
295 {
296 struct ceph_osd_data *osd_data;
297
298 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
299 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
300 pages_from_pool, own_pages);
301 osd_req->r_ops[which].cls.indata_len += length;
302 osd_req->r_ops[which].indata_len += length;
303 }
304 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
305
306 void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
307 unsigned int which,
308 struct bio_vec *bvecs, u32 num_bvecs,
309 u32 bytes)
310 {
311 struct ceph_osd_data *osd_data;
312 struct ceph_bvec_iter it = {
313 .bvecs = bvecs,
314 .iter = { .bi_size = bytes },
315 };
316
317 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
318 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
319 osd_req->r_ops[which].cls.indata_len += bytes;
320 osd_req->r_ops[which].indata_len += bytes;
321 }
322 EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
323
324 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
325 unsigned int which, struct page **pages, u64 length,
326 u32 alignment, bool pages_from_pool, bool own_pages)
327 {
328 struct ceph_osd_data *osd_data;
329
330 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
331 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
332 pages_from_pool, own_pages);
333 }
334 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
335
336 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
337 {
338 switch (osd_data->type) {
339 case CEPH_OSD_DATA_TYPE_NONE:
340 return 0;
341 case CEPH_OSD_DATA_TYPE_PAGES:
342 return osd_data->length;
343 case CEPH_OSD_DATA_TYPE_PAGELIST:
344 return (u64)osd_data->pagelist->length;
345 #ifdef CONFIG_BLOCK
346 case CEPH_OSD_DATA_TYPE_BIO:
347 return (u64)osd_data->bio_length;
348 #endif /* CONFIG_BLOCK */
349 case CEPH_OSD_DATA_TYPE_BVECS:
350 return osd_data->bvec_pos.iter.bi_size;
351 default:
352 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
353 return 0;
354 }
355 }
356
357 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
358 {
359 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
360 int num_pages;
361
362 num_pages = calc_pages_for((u64)osd_data->alignment,
363 (u64)osd_data->length);
364 ceph_release_page_vector(osd_data->pages, num_pages);
365 }
366 ceph_osd_data_init(osd_data);
367 }
368
369 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
370 unsigned int which)
371 {
372 struct ceph_osd_req_op *op;
373
374 BUG_ON(which >= osd_req->r_num_ops);
375 op = &osd_req->r_ops[which];
376
377 switch (op->op) {
378 case CEPH_OSD_OP_READ:
379 case CEPH_OSD_OP_WRITE:
380 case CEPH_OSD_OP_WRITEFULL:
381 ceph_osd_data_release(&op->extent.osd_data);
382 break;
383 case CEPH_OSD_OP_CALL:
384 ceph_osd_data_release(&op->cls.request_info);
385 ceph_osd_data_release(&op->cls.request_data);
386 ceph_osd_data_release(&op->cls.response_data);
387 break;
388 case CEPH_OSD_OP_SETXATTR:
389 case CEPH_OSD_OP_CMPXATTR:
390 ceph_osd_data_release(&op->xattr.osd_data);
391 break;
392 case CEPH_OSD_OP_STAT:
393 ceph_osd_data_release(&op->raw_data_in);
394 break;
395 case CEPH_OSD_OP_NOTIFY_ACK:
396 ceph_osd_data_release(&op->notify_ack.request_data);
397 break;
398 case CEPH_OSD_OP_NOTIFY:
399 ceph_osd_data_release(&op->notify.request_data);
400 ceph_osd_data_release(&op->notify.response_data);
401 break;
402 case CEPH_OSD_OP_LIST_WATCHERS:
403 ceph_osd_data_release(&op->list_watchers.response_data);
404 break;
405 default:
406 break;
407 }
408 }
409
410 /*
411 * Assumes @t is zero-initialized.
412 */
413 static void target_init(struct ceph_osd_request_target *t)
414 {
415 ceph_oid_init(&t->base_oid);
416 ceph_oloc_init(&t->base_oloc);
417 ceph_oid_init(&t->target_oid);
418 ceph_oloc_init(&t->target_oloc);
419
420 ceph_osds_init(&t->acting);
421 ceph_osds_init(&t->up);
422 t->size = -1;
423 t->min_size = -1;
424
425 t->osd = CEPH_HOMELESS_OSD;
426 }
427
428 static void target_copy(struct ceph_osd_request_target *dest,
429 const struct ceph_osd_request_target *src)
430 {
431 ceph_oid_copy(&dest->base_oid, &src->base_oid);
432 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
433 ceph_oid_copy(&dest->target_oid, &src->target_oid);
434 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
435
436 dest->pgid = src->pgid; /* struct */
437 dest->spgid = src->spgid; /* struct */
438 dest->pg_num = src->pg_num;
439 dest->pg_num_mask = src->pg_num_mask;
440 ceph_osds_copy(&dest->acting, &src->acting);
441 ceph_osds_copy(&dest->up, &src->up);
442 dest->size = src->size;
443 dest->min_size = src->min_size;
444 dest->sort_bitwise = src->sort_bitwise;
445
446 dest->flags = src->flags;
447 dest->paused = src->paused;
448
449 dest->epoch = src->epoch;
450 dest->last_force_resend = src->last_force_resend;
451
452 dest->osd = src->osd;
453 }
454
455 static void target_destroy(struct ceph_osd_request_target *t)
456 {
457 ceph_oid_destroy(&t->base_oid);
458 ceph_oloc_destroy(&t->base_oloc);
459 ceph_oid_destroy(&t->target_oid);
460 ceph_oloc_destroy(&t->target_oloc);
461 }
462
463 /*
464 * requests
465 */
466 static void request_release_checks(struct ceph_osd_request *req)
467 {
468 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
469 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
470 WARN_ON(!list_empty(&req->r_unsafe_item));
471 WARN_ON(req->r_osd);
472 }
473
474 static void ceph_osdc_release_request(struct kref *kref)
475 {
476 struct ceph_osd_request *req = container_of(kref,
477 struct ceph_osd_request, r_kref);
478 unsigned int which;
479
480 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
481 req->r_request, req->r_reply);
482 request_release_checks(req);
483
484 if (req->r_request)
485 ceph_msg_put(req->r_request);
486 if (req->r_reply)
487 ceph_msg_put(req->r_reply);
488
489 for (which = 0; which < req->r_num_ops; which++)
490 osd_req_op_data_release(req, which);
491
492 target_destroy(&req->r_t);
493 ceph_put_snap_context(req->r_snapc);
494
495 if (req->r_mempool)
496 mempool_free(req, req->r_osdc->req_mempool);
497 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
498 kmem_cache_free(ceph_osd_request_cache, req);
499 else
500 kfree(req);
501 }
502
503 void ceph_osdc_get_request(struct ceph_osd_request *req)
504 {
505 dout("%s %p (was %d)\n", __func__, req,
506 kref_read(&req->r_kref));
507 kref_get(&req->r_kref);
508 }
509 EXPORT_SYMBOL(ceph_osdc_get_request);
510
511 void ceph_osdc_put_request(struct ceph_osd_request *req)
512 {
513 if (req) {
514 dout("%s %p (was %d)\n", __func__, req,
515 kref_read(&req->r_kref));
516 kref_put(&req->r_kref, ceph_osdc_release_request);
517 }
518 }
519 EXPORT_SYMBOL(ceph_osdc_put_request);
520
521 static void request_init(struct ceph_osd_request *req)
522 {
523 /* req only, each op is zeroed in _osd_req_op_init() */
524 memset(req, 0, sizeof(*req));
525
526 kref_init(&req->r_kref);
527 init_completion(&req->r_completion);
528 RB_CLEAR_NODE(&req->r_node);
529 RB_CLEAR_NODE(&req->r_mc_node);
530 INIT_LIST_HEAD(&req->r_unsafe_item);
531
532 target_init(&req->r_t);
533 }
534
535 /*
536 * This is ugly, but it allows us to reuse linger registration and ping
537 * requests, keeping the structure of the code around send_linger{_ping}()
538 * reasonable. Setting up a min_nr=2 mempool for each linger request
539 * and dealing with copying ops (this blasts req only, watch op remains
540 * intact) isn't any better.
541 */
542 static void request_reinit(struct ceph_osd_request *req)
543 {
544 struct ceph_osd_client *osdc = req->r_osdc;
545 bool mempool = req->r_mempool;
546 unsigned int num_ops = req->r_num_ops;
547 u64 snapid = req->r_snapid;
548 struct ceph_snap_context *snapc = req->r_snapc;
549 bool linger = req->r_linger;
550 struct ceph_msg *request_msg = req->r_request;
551 struct ceph_msg *reply_msg = req->r_reply;
552
553 dout("%s req %p\n", __func__, req);
554 WARN_ON(kref_read(&req->r_kref) != 1);
555 request_release_checks(req);
556
557 WARN_ON(kref_read(&request_msg->kref) != 1);
558 WARN_ON(kref_read(&reply_msg->kref) != 1);
559 target_destroy(&req->r_t);
560
561 request_init(req);
562 req->r_osdc = osdc;
563 req->r_mempool = mempool;
564 req->r_num_ops = num_ops;
565 req->r_snapid = snapid;
566 req->r_snapc = snapc;
567 req->r_linger = linger;
568 req->r_request = request_msg;
569 req->r_reply = reply_msg;
570 }
571
572 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
573 struct ceph_snap_context *snapc,
574 unsigned int num_ops,
575 bool use_mempool,
576 gfp_t gfp_flags)
577 {
578 struct ceph_osd_request *req;
579
580 if (use_mempool) {
581 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
582 req = mempool_alloc(osdc->req_mempool, gfp_flags);
583 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
584 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
585 } else {
586 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
587 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
588 }
589 if (unlikely(!req))
590 return NULL;
591
592 request_init(req);
593 req->r_osdc = osdc;
594 req->r_mempool = use_mempool;
595 req->r_num_ops = num_ops;
596 req->r_snapid = CEPH_NOSNAP;
597 req->r_snapc = ceph_get_snap_context(snapc);
598
599 dout("%s req %p\n", __func__, req);
600 return req;
601 }
602 EXPORT_SYMBOL(ceph_osdc_alloc_request);
603
604 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
605 {
606 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
607 }
608
609 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
610 {
611 struct ceph_osd_client *osdc = req->r_osdc;
612 struct ceph_msg *msg;
613 int msg_size;
614
615 WARN_ON(ceph_oid_empty(&req->r_base_oid));
616 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
617
618 /* create request message */
619 msg_size = CEPH_ENCODING_START_BLK_LEN +
620 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
621 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
622 msg_size += CEPH_ENCODING_START_BLK_LEN +
623 sizeof(struct ceph_osd_reqid); /* reqid */
624 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
625 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
626 msg_size += CEPH_ENCODING_START_BLK_LEN +
627 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
628 msg_size += 4 + req->r_base_oid.name_len; /* oid */
629 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
630 msg_size += 8; /* snapid */
631 msg_size += 8; /* snap_seq */
632 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
633 msg_size += 4 + 8; /* retry_attempt, features */
634
635 if (req->r_mempool)
636 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
637 else
638 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, 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, 0);
652 else
653 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
654 if (!msg)
655 return -ENOMEM;
656
657 req->r_reply = msg;
658
659 return 0;
660 }
661 EXPORT_SYMBOL(ceph_osdc_alloc_messages);
662
663 static bool osd_req_opcode_valid(u16 opcode)
664 {
665 switch (opcode) {
666 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
667 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
668 #undef GENERATE_CASE
669 default:
670 return false;
671 }
672 }
673
674 /*
675 * This is an osd op init function for opcodes that have no data or
676 * other information associated with them. It also serves as a
677 * common init routine for all the other init functions, below.
678 */
679 static struct ceph_osd_req_op *
680 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
681 u16 opcode, u32 flags)
682 {
683 struct ceph_osd_req_op *op;
684
685 BUG_ON(which >= osd_req->r_num_ops);
686 BUG_ON(!osd_req_opcode_valid(opcode));
687
688 op = &osd_req->r_ops[which];
689 memset(op, 0, sizeof (*op));
690 op->op = opcode;
691 op->flags = flags;
692
693 return op;
694 }
695
696 void osd_req_op_init(struct ceph_osd_request *osd_req,
697 unsigned int which, u16 opcode, u32 flags)
698 {
699 (void)_osd_req_op_init(osd_req, which, opcode, flags);
700 }
701 EXPORT_SYMBOL(osd_req_op_init);
702
703 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
704 unsigned int which, u16 opcode,
705 u64 offset, u64 length,
706 u64 truncate_size, u32 truncate_seq)
707 {
708 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
709 opcode, 0);
710 size_t payload_len = 0;
711
712 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
713 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
714 opcode != CEPH_OSD_OP_TRUNCATE);
715
716 op->extent.offset = offset;
717 op->extent.length = length;
718 op->extent.truncate_size = truncate_size;
719 op->extent.truncate_seq = truncate_seq;
720 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
721 payload_len += length;
722
723 op->indata_len = payload_len;
724 }
725 EXPORT_SYMBOL(osd_req_op_extent_init);
726
727 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
728 unsigned int which, u64 length)
729 {
730 struct ceph_osd_req_op *op;
731 u64 previous;
732
733 BUG_ON(which >= osd_req->r_num_ops);
734 op = &osd_req->r_ops[which];
735 previous = op->extent.length;
736
737 if (length == previous)
738 return; /* Nothing to do */
739 BUG_ON(length > previous);
740
741 op->extent.length = length;
742 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
743 op->indata_len -= previous - length;
744 }
745 EXPORT_SYMBOL(osd_req_op_extent_update);
746
747 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
748 unsigned int which, u64 offset_inc)
749 {
750 struct ceph_osd_req_op *op, *prev_op;
751
752 BUG_ON(which + 1 >= osd_req->r_num_ops);
753
754 prev_op = &osd_req->r_ops[which];
755 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
756 /* dup previous one */
757 op->indata_len = prev_op->indata_len;
758 op->outdata_len = prev_op->outdata_len;
759 op->extent = prev_op->extent;
760 /* adjust offset */
761 op->extent.offset += offset_inc;
762 op->extent.length -= offset_inc;
763
764 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
765 op->indata_len -= offset_inc;
766 }
767 EXPORT_SYMBOL(osd_req_op_extent_dup_last);
768
769 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
770 u16 opcode, const char *class, const char *method)
771 {
772 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
773 opcode, 0);
774 struct ceph_pagelist *pagelist;
775 size_t payload_len = 0;
776 size_t size;
777
778 BUG_ON(opcode != CEPH_OSD_OP_CALL);
779
780 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
781 if (!pagelist)
782 return -ENOMEM;
783
784 ceph_pagelist_init(pagelist);
785
786 op->cls.class_name = class;
787 size = strlen(class);
788 BUG_ON(size > (size_t) U8_MAX);
789 op->cls.class_len = size;
790 ceph_pagelist_append(pagelist, class, size);
791 payload_len += size;
792
793 op->cls.method_name = method;
794 size = strlen(method);
795 BUG_ON(size > (size_t) U8_MAX);
796 op->cls.method_len = size;
797 ceph_pagelist_append(pagelist, method, size);
798 payload_len += size;
799
800 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
801
802 op->indata_len = payload_len;
803 return 0;
804 }
805 EXPORT_SYMBOL(osd_req_op_cls_init);
806
807 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
808 u16 opcode, const char *name, const void *value,
809 size_t size, u8 cmp_op, u8 cmp_mode)
810 {
811 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
812 opcode, 0);
813 struct ceph_pagelist *pagelist;
814 size_t payload_len;
815
816 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
817
818 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
819 if (!pagelist)
820 return -ENOMEM;
821
822 ceph_pagelist_init(pagelist);
823
824 payload_len = strlen(name);
825 op->xattr.name_len = payload_len;
826 ceph_pagelist_append(pagelist, name, payload_len);
827
828 op->xattr.value_len = size;
829 ceph_pagelist_append(pagelist, value, size);
830 payload_len += size;
831
832 op->xattr.cmp_op = cmp_op;
833 op->xattr.cmp_mode = cmp_mode;
834
835 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
836 op->indata_len = payload_len;
837 return 0;
838 }
839 EXPORT_SYMBOL(osd_req_op_xattr_init);
840
841 /*
842 * @watch_opcode: CEPH_OSD_WATCH_OP_*
843 */
844 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
845 u64 cookie, u8 watch_opcode)
846 {
847 struct ceph_osd_req_op *op;
848
849 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
850 op->watch.cookie = cookie;
851 op->watch.op = watch_opcode;
852 op->watch.gen = 0;
853 }
854
855 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
856 unsigned int which,
857 u64 expected_object_size,
858 u64 expected_write_size)
859 {
860 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
861 CEPH_OSD_OP_SETALLOCHINT,
862 0);
863
864 op->alloc_hint.expected_object_size = expected_object_size;
865 op->alloc_hint.expected_write_size = expected_write_size;
866
867 /*
868 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
869 * not worth a feature bit. Set FAILOK per-op flag to make
870 * sure older osds don't trip over an unsupported opcode.
871 */
872 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
873 }
874 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
875
876 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
877 struct ceph_osd_data *osd_data)
878 {
879 u64 length = ceph_osd_data_length(osd_data);
880
881 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
882 BUG_ON(length > (u64) SIZE_MAX);
883 if (length)
884 ceph_msg_data_add_pages(msg, osd_data->pages,
885 length, osd_data->alignment);
886 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
887 BUG_ON(!length);
888 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
889 #ifdef CONFIG_BLOCK
890 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
891 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
892 #endif
893 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
894 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
895 } else {
896 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
897 }
898 }
899
900 static u32 osd_req_encode_op(struct ceph_osd_op *dst,
901 const struct ceph_osd_req_op *src)
902 {
903 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
904 pr_err("unrecognized osd opcode %d\n", src->op);
905
906 return 0;
907 }
908
909 switch (src->op) {
910 case CEPH_OSD_OP_STAT:
911 break;
912 case CEPH_OSD_OP_READ:
913 case CEPH_OSD_OP_WRITE:
914 case CEPH_OSD_OP_WRITEFULL:
915 case CEPH_OSD_OP_ZERO:
916 case CEPH_OSD_OP_TRUNCATE:
917 dst->extent.offset = cpu_to_le64(src->extent.offset);
918 dst->extent.length = cpu_to_le64(src->extent.length);
919 dst->extent.truncate_size =
920 cpu_to_le64(src->extent.truncate_size);
921 dst->extent.truncate_seq =
922 cpu_to_le32(src->extent.truncate_seq);
923 break;
924 case CEPH_OSD_OP_CALL:
925 dst->cls.class_len = src->cls.class_len;
926 dst->cls.method_len = src->cls.method_len;
927 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
928 break;
929 case CEPH_OSD_OP_WATCH:
930 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
931 dst->watch.ver = cpu_to_le64(0);
932 dst->watch.op = src->watch.op;
933 dst->watch.gen = cpu_to_le32(src->watch.gen);
934 break;
935 case CEPH_OSD_OP_NOTIFY_ACK:
936 break;
937 case CEPH_OSD_OP_NOTIFY:
938 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
939 break;
940 case CEPH_OSD_OP_LIST_WATCHERS:
941 break;
942 case CEPH_OSD_OP_SETALLOCHINT:
943 dst->alloc_hint.expected_object_size =
944 cpu_to_le64(src->alloc_hint.expected_object_size);
945 dst->alloc_hint.expected_write_size =
946 cpu_to_le64(src->alloc_hint.expected_write_size);
947 break;
948 case CEPH_OSD_OP_SETXATTR:
949 case CEPH_OSD_OP_CMPXATTR:
950 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
951 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
952 dst->xattr.cmp_op = src->xattr.cmp_op;
953 dst->xattr.cmp_mode = src->xattr.cmp_mode;
954 break;
955 case CEPH_OSD_OP_CREATE:
956 case CEPH_OSD_OP_DELETE:
957 break;
958 default:
959 pr_err("unsupported osd opcode %s\n",
960 ceph_osd_op_name(src->op));
961 WARN_ON(1);
962
963 return 0;
964 }
965
966 dst->op = cpu_to_le16(src->op);
967 dst->flags = cpu_to_le32(src->flags);
968 dst->payload_len = cpu_to_le32(src->indata_len);
969
970 return src->indata_len;
971 }
972
973 /*
974 * build new request AND message, calculate layout, and adjust file
975 * extent as needed.
976 *
977 * if the file was recently truncated, we include information about its
978 * old and new size so that the object can be updated appropriately. (we
979 * avoid synchronously deleting truncated objects because it's slow.)
980 */
981 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
982 struct ceph_file_layout *layout,
983 struct ceph_vino vino,
984 u64 off, u64 *plen,
985 unsigned int which, int num_ops,
986 int opcode, int flags,
987 struct ceph_snap_context *snapc,
988 u32 truncate_seq,
989 u64 truncate_size,
990 bool use_mempool)
991 {
992 struct ceph_osd_request *req;
993 u64 objnum = 0;
994 u64 objoff = 0;
995 u64 objlen = 0;
996 int r;
997
998 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
999 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1000 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
1001
1002 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
1003 GFP_NOFS);
1004 if (!req) {
1005 r = -ENOMEM;
1006 goto fail;
1007 }
1008
1009 /* calculate max write size */
1010 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
1011 if (r)
1012 goto fail;
1013
1014 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
1015 osd_req_op_init(req, which, opcode, 0);
1016 } else {
1017 u32 object_size = layout->object_size;
1018 u32 object_base = off - objoff;
1019 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1020 if (truncate_size <= object_base) {
1021 truncate_size = 0;
1022 } else {
1023 truncate_size -= object_base;
1024 if (truncate_size > object_size)
1025 truncate_size = object_size;
1026 }
1027 }
1028 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1029 truncate_size, truncate_seq);
1030 }
1031
1032 req->r_flags = flags;
1033 req->r_base_oloc.pool = layout->pool_id;
1034 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1035 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1036
1037 req->r_snapid = vino.snap;
1038 if (flags & CEPH_OSD_FLAG_WRITE)
1039 req->r_data_offset = off;
1040
1041 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
1042 if (r)
1043 goto fail;
1044
1045 return req;
1046
1047 fail:
1048 ceph_osdc_put_request(req);
1049 return ERR_PTR(r);
1050 }
1051 EXPORT_SYMBOL(ceph_osdc_new_request);
1052
1053 /*
1054 * We keep osd requests in an rbtree, sorted by ->r_tid.
1055 */
1056 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
1057 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
1058
1059 /*
1060 * Call @fn on each OSD request as long as @fn returns 0.
1061 */
1062 static void for_each_request(struct ceph_osd_client *osdc,
1063 int (*fn)(struct ceph_osd_request *req, void *arg),
1064 void *arg)
1065 {
1066 struct rb_node *n, *p;
1067
1068 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1069 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1070
1071 for (p = rb_first(&osd->o_requests); p; ) {
1072 struct ceph_osd_request *req =
1073 rb_entry(p, struct ceph_osd_request, r_node);
1074
1075 p = rb_next(p);
1076 if (fn(req, arg))
1077 return;
1078 }
1079 }
1080
1081 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1082 struct ceph_osd_request *req =
1083 rb_entry(p, struct ceph_osd_request, r_node);
1084
1085 p = rb_next(p);
1086 if (fn(req, arg))
1087 return;
1088 }
1089 }
1090
1091 static bool osd_homeless(struct ceph_osd *osd)
1092 {
1093 return osd->o_osd == CEPH_HOMELESS_OSD;
1094 }
1095
1096 static bool osd_registered(struct ceph_osd *osd)
1097 {
1098 verify_osdc_locked(osd->o_osdc);
1099
1100 return !RB_EMPTY_NODE(&osd->o_node);
1101 }
1102
1103 /*
1104 * Assumes @osd is zero-initialized.
1105 */
1106 static void osd_init(struct ceph_osd *osd)
1107 {
1108 refcount_set(&osd->o_ref, 1);
1109 RB_CLEAR_NODE(&osd->o_node);
1110 osd->o_requests = RB_ROOT;
1111 osd->o_linger_requests = RB_ROOT;
1112 osd->o_backoff_mappings = RB_ROOT;
1113 osd->o_backoffs_by_id = RB_ROOT;
1114 INIT_LIST_HEAD(&osd->o_osd_lru);
1115 INIT_LIST_HEAD(&osd->o_keepalive_item);
1116 osd->o_incarnation = 1;
1117 mutex_init(&osd->lock);
1118 }
1119
1120 static void osd_cleanup(struct ceph_osd *osd)
1121 {
1122 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1123 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1124 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1125 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1126 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1127 WARN_ON(!list_empty(&osd->o_osd_lru));
1128 WARN_ON(!list_empty(&osd->o_keepalive_item));
1129
1130 if (osd->o_auth.authorizer) {
1131 WARN_ON(osd_homeless(osd));
1132 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1133 }
1134 }
1135
1136 /*
1137 * Track open sessions with osds.
1138 */
1139 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1140 {
1141 struct ceph_osd *osd;
1142
1143 WARN_ON(onum == CEPH_HOMELESS_OSD);
1144
1145 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1146 osd_init(osd);
1147 osd->o_osdc = osdc;
1148 osd->o_osd = onum;
1149
1150 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1151
1152 return osd;
1153 }
1154
1155 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1156 {
1157 if (refcount_inc_not_zero(&osd->o_ref)) {
1158 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1159 refcount_read(&osd->o_ref));
1160 return osd;
1161 } else {
1162 dout("get_osd %p FAIL\n", osd);
1163 return NULL;
1164 }
1165 }
1166
1167 static void put_osd(struct ceph_osd *osd)
1168 {
1169 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1170 refcount_read(&osd->o_ref) - 1);
1171 if (refcount_dec_and_test(&osd->o_ref)) {
1172 osd_cleanup(osd);
1173 kfree(osd);
1174 }
1175 }
1176
1177 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1178
1179 static void __move_osd_to_lru(struct ceph_osd *osd)
1180 {
1181 struct ceph_osd_client *osdc = osd->o_osdc;
1182
1183 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1184 BUG_ON(!list_empty(&osd->o_osd_lru));
1185
1186 spin_lock(&osdc->osd_lru_lock);
1187 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1188 spin_unlock(&osdc->osd_lru_lock);
1189
1190 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1191 }
1192
1193 static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1194 {
1195 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1196 RB_EMPTY_ROOT(&osd->o_linger_requests))
1197 __move_osd_to_lru(osd);
1198 }
1199
1200 static void __remove_osd_from_lru(struct ceph_osd *osd)
1201 {
1202 struct ceph_osd_client *osdc = osd->o_osdc;
1203
1204 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1205
1206 spin_lock(&osdc->osd_lru_lock);
1207 if (!list_empty(&osd->o_osd_lru))
1208 list_del_init(&osd->o_osd_lru);
1209 spin_unlock(&osdc->osd_lru_lock);
1210 }
1211
1212 /*
1213 * Close the connection and assign any leftover requests to the
1214 * homeless session.
1215 */
1216 static void close_osd(struct ceph_osd *osd)
1217 {
1218 struct ceph_osd_client *osdc = osd->o_osdc;
1219 struct rb_node *n;
1220
1221 verify_osdc_wrlocked(osdc);
1222 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1223
1224 ceph_con_close(&osd->o_con);
1225
1226 for (n = rb_first(&osd->o_requests); n; ) {
1227 struct ceph_osd_request *req =
1228 rb_entry(n, struct ceph_osd_request, r_node);
1229
1230 n = rb_next(n); /* unlink_request() */
1231
1232 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1233 unlink_request(osd, req);
1234 link_request(&osdc->homeless_osd, req);
1235 }
1236 for (n = rb_first(&osd->o_linger_requests); n; ) {
1237 struct ceph_osd_linger_request *lreq =
1238 rb_entry(n, struct ceph_osd_linger_request, node);
1239
1240 n = rb_next(n); /* unlink_linger() */
1241
1242 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1243 lreq->linger_id);
1244 unlink_linger(osd, lreq);
1245 link_linger(&osdc->homeless_osd, lreq);
1246 }
1247 clear_backoffs(osd);
1248
1249 __remove_osd_from_lru(osd);
1250 erase_osd(&osdc->osds, osd);
1251 put_osd(osd);
1252 }
1253
1254 /*
1255 * reset osd connect
1256 */
1257 static int reopen_osd(struct ceph_osd *osd)
1258 {
1259 struct ceph_entity_addr *peer_addr;
1260
1261 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1262
1263 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1264 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1265 close_osd(osd);
1266 return -ENODEV;
1267 }
1268
1269 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1270 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1271 !ceph_con_opened(&osd->o_con)) {
1272 struct rb_node *n;
1273
1274 dout("osd addr hasn't changed and connection never opened, "
1275 "letting msgr retry\n");
1276 /* touch each r_stamp for handle_timeout()'s benfit */
1277 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1278 struct ceph_osd_request *req =
1279 rb_entry(n, struct ceph_osd_request, r_node);
1280 req->r_stamp = jiffies;
1281 }
1282
1283 return -EAGAIN;
1284 }
1285
1286 ceph_con_close(&osd->o_con);
1287 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1288 osd->o_incarnation++;
1289
1290 return 0;
1291 }
1292
1293 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1294 bool wrlocked)
1295 {
1296 struct ceph_osd *osd;
1297
1298 if (wrlocked)
1299 verify_osdc_wrlocked(osdc);
1300 else
1301 verify_osdc_locked(osdc);
1302
1303 if (o != CEPH_HOMELESS_OSD)
1304 osd = lookup_osd(&osdc->osds, o);
1305 else
1306 osd = &osdc->homeless_osd;
1307 if (!osd) {
1308 if (!wrlocked)
1309 return ERR_PTR(-EAGAIN);
1310
1311 osd = create_osd(osdc, o);
1312 insert_osd(&osdc->osds, osd);
1313 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1314 &osdc->osdmap->osd_addr[osd->o_osd]);
1315 }
1316
1317 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1318 return osd;
1319 }
1320
1321 /*
1322 * Create request <-> OSD session relation.
1323 *
1324 * @req has to be assigned a tid, @osd may be homeless.
1325 */
1326 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1327 {
1328 verify_osd_locked(osd);
1329 WARN_ON(!req->r_tid || req->r_osd);
1330 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1331 req, req->r_tid);
1332
1333 if (!osd_homeless(osd))
1334 __remove_osd_from_lru(osd);
1335 else
1336 atomic_inc(&osd->o_osdc->num_homeless);
1337
1338 get_osd(osd);
1339 insert_request(&osd->o_requests, req);
1340 req->r_osd = osd;
1341 }
1342
1343 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1344 {
1345 verify_osd_locked(osd);
1346 WARN_ON(req->r_osd != osd);
1347 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1348 req, req->r_tid);
1349
1350 req->r_osd = NULL;
1351 erase_request(&osd->o_requests, req);
1352 put_osd(osd);
1353
1354 if (!osd_homeless(osd))
1355 maybe_move_osd_to_lru(osd);
1356 else
1357 atomic_dec(&osd->o_osdc->num_homeless);
1358 }
1359
1360 static bool __pool_full(struct ceph_pg_pool_info *pi)
1361 {
1362 return pi->flags & CEPH_POOL_FLAG_FULL;
1363 }
1364
1365 static bool have_pool_full(struct ceph_osd_client *osdc)
1366 {
1367 struct rb_node *n;
1368
1369 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1370 struct ceph_pg_pool_info *pi =
1371 rb_entry(n, struct ceph_pg_pool_info, node);
1372
1373 if (__pool_full(pi))
1374 return true;
1375 }
1376
1377 return false;
1378 }
1379
1380 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1381 {
1382 struct ceph_pg_pool_info *pi;
1383
1384 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1385 if (!pi)
1386 return false;
1387
1388 return __pool_full(pi);
1389 }
1390
1391 /*
1392 * Returns whether a request should be blocked from being sent
1393 * based on the current osdmap and osd_client settings.
1394 */
1395 static bool target_should_be_paused(struct ceph_osd_client *osdc,
1396 const struct ceph_osd_request_target *t,
1397 struct ceph_pg_pool_info *pi)
1398 {
1399 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1400 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1401 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1402 __pool_full(pi);
1403
1404 WARN_ON(pi->id != t->target_oloc.pool);
1405 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1406 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1407 (osdc->osdmap->epoch < osdc->epoch_barrier);
1408 }
1409
1410 enum calc_target_result {
1411 CALC_TARGET_NO_ACTION = 0,
1412 CALC_TARGET_NEED_RESEND,
1413 CALC_TARGET_POOL_DNE,
1414 };
1415
1416 static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1417 struct ceph_osd_request_target *t,
1418 struct ceph_connection *con,
1419 bool any_change)
1420 {
1421 struct ceph_pg_pool_info *pi;
1422 struct ceph_pg pgid, last_pgid;
1423 struct ceph_osds up, acting;
1424 bool force_resend = false;
1425 bool unpaused = false;
1426 bool legacy_change;
1427 bool split = false;
1428 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1429 bool recovery_deletes = ceph_osdmap_flag(osdc,
1430 CEPH_OSDMAP_RECOVERY_DELETES);
1431 enum calc_target_result ct_res;
1432
1433 t->epoch = osdc->osdmap->epoch;
1434 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1435 if (!pi) {
1436 t->osd = CEPH_HOMELESS_OSD;
1437 ct_res = CALC_TARGET_POOL_DNE;
1438 goto out;
1439 }
1440
1441 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1442 if (t->last_force_resend < pi->last_force_request_resend) {
1443 t->last_force_resend = pi->last_force_request_resend;
1444 force_resend = true;
1445 } else if (t->last_force_resend == 0) {
1446 force_resend = true;
1447 }
1448 }
1449
1450 /* apply tiering */
1451 ceph_oid_copy(&t->target_oid, &t->base_oid);
1452 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1453 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1454 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1455 t->target_oloc.pool = pi->read_tier;
1456 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1457 t->target_oloc.pool = pi->write_tier;
1458
1459 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1460 if (!pi) {
1461 t->osd = CEPH_HOMELESS_OSD;
1462 ct_res = CALC_TARGET_POOL_DNE;
1463 goto out;
1464 }
1465 }
1466
1467 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
1468 last_pgid.pool = pgid.pool;
1469 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1470
1471 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1472 if (any_change &&
1473 ceph_is_new_interval(&t->acting,
1474 &acting,
1475 &t->up,
1476 &up,
1477 t->size,
1478 pi->size,
1479 t->min_size,
1480 pi->min_size,
1481 t->pg_num,
1482 pi->pg_num,
1483 t->sort_bitwise,
1484 sort_bitwise,
1485 t->recovery_deletes,
1486 recovery_deletes,
1487 &last_pgid))
1488 force_resend = true;
1489
1490 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1491 t->paused = false;
1492 unpaused = true;
1493 }
1494 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1495 ceph_osds_changed(&t->acting, &acting, any_change);
1496 if (t->pg_num)
1497 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1498
1499 if (legacy_change || force_resend || split) {
1500 t->pgid = pgid; /* struct */
1501 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1502 ceph_osds_copy(&t->acting, &acting);
1503 ceph_osds_copy(&t->up, &up);
1504 t->size = pi->size;
1505 t->min_size = pi->min_size;
1506 t->pg_num = pi->pg_num;
1507 t->pg_num_mask = pi->pg_num_mask;
1508 t->sort_bitwise = sort_bitwise;
1509 t->recovery_deletes = recovery_deletes;
1510
1511 t->osd = acting.primary;
1512 }
1513
1514 if (unpaused || legacy_change || force_resend ||
1515 (split && con && CEPH_HAVE_FEATURE(con->peer_features,
1516 RESEND_ON_SPLIT)))
1517 ct_res = CALC_TARGET_NEED_RESEND;
1518 else
1519 ct_res = CALC_TARGET_NO_ACTION;
1520
1521 out:
1522 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1523 return ct_res;
1524 }
1525
1526 static struct ceph_spg_mapping *alloc_spg_mapping(void)
1527 {
1528 struct ceph_spg_mapping *spg;
1529
1530 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1531 if (!spg)
1532 return NULL;
1533
1534 RB_CLEAR_NODE(&spg->node);
1535 spg->backoffs = RB_ROOT;
1536 return spg;
1537 }
1538
1539 static void free_spg_mapping(struct ceph_spg_mapping *spg)
1540 {
1541 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1542 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1543
1544 kfree(spg);
1545 }
1546
1547 /*
1548 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1549 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1550 * defined only within a specific spgid; it does not pass anything to
1551 * children on split, or to another primary.
1552 */
1553 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1554 RB_BYPTR, const struct ceph_spg *, node)
1555
1556 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1557 {
1558 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1559 }
1560
1561 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1562 void **pkey, size_t *pkey_len)
1563 {
1564 if (hoid->key_len) {
1565 *pkey = hoid->key;
1566 *pkey_len = hoid->key_len;
1567 } else {
1568 *pkey = hoid->oid;
1569 *pkey_len = hoid->oid_len;
1570 }
1571 }
1572
1573 static int compare_names(const void *name1, size_t name1_len,
1574 const void *name2, size_t name2_len)
1575 {
1576 int ret;
1577
1578 ret = memcmp(name1, name2, min(name1_len, name2_len));
1579 if (!ret) {
1580 if (name1_len < name2_len)
1581 ret = -1;
1582 else if (name1_len > name2_len)
1583 ret = 1;
1584 }
1585 return ret;
1586 }
1587
1588 static int hoid_compare(const struct ceph_hobject_id *lhs,
1589 const struct ceph_hobject_id *rhs)
1590 {
1591 void *effective_key1, *effective_key2;
1592 size_t effective_key1_len, effective_key2_len;
1593 int ret;
1594
1595 if (lhs->is_max < rhs->is_max)
1596 return -1;
1597 if (lhs->is_max > rhs->is_max)
1598 return 1;
1599
1600 if (lhs->pool < rhs->pool)
1601 return -1;
1602 if (lhs->pool > rhs->pool)
1603 return 1;
1604
1605 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1606 return -1;
1607 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1608 return 1;
1609
1610 ret = compare_names(lhs->nspace, lhs->nspace_len,
1611 rhs->nspace, rhs->nspace_len);
1612 if (ret)
1613 return ret;
1614
1615 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1616 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1617 ret = compare_names(effective_key1, effective_key1_len,
1618 effective_key2, effective_key2_len);
1619 if (ret)
1620 return ret;
1621
1622 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1623 if (ret)
1624 return ret;
1625
1626 if (lhs->snapid < rhs->snapid)
1627 return -1;
1628 if (lhs->snapid > rhs->snapid)
1629 return 1;
1630
1631 return 0;
1632 }
1633
1634 /*
1635 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1636 * compat stuff here.
1637 *
1638 * Assumes @hoid is zero-initialized.
1639 */
1640 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1641 {
1642 u8 struct_v;
1643 u32 struct_len;
1644 int ret;
1645
1646 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1647 &struct_len);
1648 if (ret)
1649 return ret;
1650
1651 if (struct_v < 4) {
1652 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1653 goto e_inval;
1654 }
1655
1656 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1657 GFP_NOIO);
1658 if (IS_ERR(hoid->key)) {
1659 ret = PTR_ERR(hoid->key);
1660 hoid->key = NULL;
1661 return ret;
1662 }
1663
1664 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1665 GFP_NOIO);
1666 if (IS_ERR(hoid->oid)) {
1667 ret = PTR_ERR(hoid->oid);
1668 hoid->oid = NULL;
1669 return ret;
1670 }
1671
1672 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1673 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1674 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1675
1676 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1677 GFP_NOIO);
1678 if (IS_ERR(hoid->nspace)) {
1679 ret = PTR_ERR(hoid->nspace);
1680 hoid->nspace = NULL;
1681 return ret;
1682 }
1683
1684 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1685
1686 ceph_hoid_build_hash_cache(hoid);
1687 return 0;
1688
1689 e_inval:
1690 return -EINVAL;
1691 }
1692
1693 static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1694 {
1695 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1696 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1697 }
1698
1699 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1700 {
1701 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1702 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1703 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1704 ceph_encode_64(p, hoid->snapid);
1705 ceph_encode_32(p, hoid->hash);
1706 ceph_encode_8(p, hoid->is_max);
1707 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1708 ceph_encode_64(p, hoid->pool);
1709 }
1710
1711 static void free_hoid(struct ceph_hobject_id *hoid)
1712 {
1713 if (hoid) {
1714 kfree(hoid->key);
1715 kfree(hoid->oid);
1716 kfree(hoid->nspace);
1717 kfree(hoid);
1718 }
1719 }
1720
1721 static struct ceph_osd_backoff *alloc_backoff(void)
1722 {
1723 struct ceph_osd_backoff *backoff;
1724
1725 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1726 if (!backoff)
1727 return NULL;
1728
1729 RB_CLEAR_NODE(&backoff->spg_node);
1730 RB_CLEAR_NODE(&backoff->id_node);
1731 return backoff;
1732 }
1733
1734 static void free_backoff(struct ceph_osd_backoff *backoff)
1735 {
1736 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1737 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1738
1739 free_hoid(backoff->begin);
1740 free_hoid(backoff->end);
1741 kfree(backoff);
1742 }
1743
1744 /*
1745 * Within a specific spgid, backoffs are managed by ->begin hoid.
1746 */
1747 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1748 RB_BYVAL, spg_node);
1749
1750 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1751 const struct ceph_hobject_id *hoid)
1752 {
1753 struct rb_node *n = root->rb_node;
1754
1755 while (n) {
1756 struct ceph_osd_backoff *cur =
1757 rb_entry(n, struct ceph_osd_backoff, spg_node);
1758 int cmp;
1759
1760 cmp = hoid_compare(hoid, cur->begin);
1761 if (cmp < 0) {
1762 n = n->rb_left;
1763 } else if (cmp > 0) {
1764 if (hoid_compare(hoid, cur->end) < 0)
1765 return cur;
1766
1767 n = n->rb_right;
1768 } else {
1769 return cur;
1770 }
1771 }
1772
1773 return NULL;
1774 }
1775
1776 /*
1777 * Each backoff has a unique id within its OSD session.
1778 */
1779 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1780
1781 static void clear_backoffs(struct ceph_osd *osd)
1782 {
1783 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1784 struct ceph_spg_mapping *spg =
1785 rb_entry(rb_first(&osd->o_backoff_mappings),
1786 struct ceph_spg_mapping, node);
1787
1788 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1789 struct ceph_osd_backoff *backoff =
1790 rb_entry(rb_first(&spg->backoffs),
1791 struct ceph_osd_backoff, spg_node);
1792
1793 erase_backoff(&spg->backoffs, backoff);
1794 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1795 free_backoff(backoff);
1796 }
1797 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1798 free_spg_mapping(spg);
1799 }
1800 }
1801
1802 /*
1803 * Set up a temporary, non-owning view into @t.
1804 */
1805 static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1806 const struct ceph_osd_request_target *t)
1807 {
1808 hoid->key = NULL;
1809 hoid->key_len = 0;
1810 hoid->oid = t->target_oid.name;
1811 hoid->oid_len = t->target_oid.name_len;
1812 hoid->snapid = CEPH_NOSNAP;
1813 hoid->hash = t->pgid.seed;
1814 hoid->is_max = false;
1815 if (t->target_oloc.pool_ns) {
1816 hoid->nspace = t->target_oloc.pool_ns->str;
1817 hoid->nspace_len = t->target_oloc.pool_ns->len;
1818 } else {
1819 hoid->nspace = NULL;
1820 hoid->nspace_len = 0;
1821 }
1822 hoid->pool = t->target_oloc.pool;
1823 ceph_hoid_build_hash_cache(hoid);
1824 }
1825
1826 static bool should_plug_request(struct ceph_osd_request *req)
1827 {
1828 struct ceph_osd *osd = req->r_osd;
1829 struct ceph_spg_mapping *spg;
1830 struct ceph_osd_backoff *backoff;
1831 struct ceph_hobject_id hoid;
1832
1833 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1834 if (!spg)
1835 return false;
1836
1837 hoid_fill_from_target(&hoid, &req->r_t);
1838 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1839 if (!backoff)
1840 return false;
1841
1842 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1843 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1844 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1845 return true;
1846 }
1847
1848 static void setup_request_data(struct ceph_osd_request *req,
1849 struct ceph_msg *msg)
1850 {
1851 u32 data_len = 0;
1852 int i;
1853
1854 if (!list_empty(&msg->data))
1855 return;
1856
1857 WARN_ON(msg->data_length);
1858 for (i = 0; i < req->r_num_ops; i++) {
1859 struct ceph_osd_req_op *op = &req->r_ops[i];
1860
1861 switch (op->op) {
1862 /* request */
1863 case CEPH_OSD_OP_WRITE:
1864 case CEPH_OSD_OP_WRITEFULL:
1865 WARN_ON(op->indata_len != op->extent.length);
1866 ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1867 break;
1868 case CEPH_OSD_OP_SETXATTR:
1869 case CEPH_OSD_OP_CMPXATTR:
1870 WARN_ON(op->indata_len != op->xattr.name_len +
1871 op->xattr.value_len);
1872 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1873 break;
1874 case CEPH_OSD_OP_NOTIFY_ACK:
1875 ceph_osdc_msg_data_add(msg,
1876 &op->notify_ack.request_data);
1877 break;
1878
1879 /* reply */
1880 case CEPH_OSD_OP_STAT:
1881 ceph_osdc_msg_data_add(req->r_reply,
1882 &op->raw_data_in);
1883 break;
1884 case CEPH_OSD_OP_READ:
1885 ceph_osdc_msg_data_add(req->r_reply,
1886 &op->extent.osd_data);
1887 break;
1888 case CEPH_OSD_OP_LIST_WATCHERS:
1889 ceph_osdc_msg_data_add(req->r_reply,
1890 &op->list_watchers.response_data);
1891 break;
1892
1893 /* both */
1894 case CEPH_OSD_OP_CALL:
1895 WARN_ON(op->indata_len != op->cls.class_len +
1896 op->cls.method_len +
1897 op->cls.indata_len);
1898 ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1899 /* optional, can be NONE */
1900 ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1901 /* optional, can be NONE */
1902 ceph_osdc_msg_data_add(req->r_reply,
1903 &op->cls.response_data);
1904 break;
1905 case CEPH_OSD_OP_NOTIFY:
1906 ceph_osdc_msg_data_add(msg,
1907 &op->notify.request_data);
1908 ceph_osdc_msg_data_add(req->r_reply,
1909 &op->notify.response_data);
1910 break;
1911 }
1912
1913 data_len += op->indata_len;
1914 }
1915
1916 WARN_ON(data_len != msg->data_length);
1917 }
1918
1919 static void encode_pgid(void **p, const struct ceph_pg *pgid)
1920 {
1921 ceph_encode_8(p, 1);
1922 ceph_encode_64(p, pgid->pool);
1923 ceph_encode_32(p, pgid->seed);
1924 ceph_encode_32(p, -1); /* preferred */
1925 }
1926
1927 static void encode_spgid(void **p, const struct ceph_spg *spgid)
1928 {
1929 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
1930 encode_pgid(p, &spgid->pgid);
1931 ceph_encode_8(p, spgid->shard);
1932 }
1933
1934 static void encode_oloc(void **p, void *end,
1935 const struct ceph_object_locator *oloc)
1936 {
1937 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
1938 ceph_encode_64(p, oloc->pool);
1939 ceph_encode_32(p, -1); /* preferred */
1940 ceph_encode_32(p, 0); /* key len */
1941 if (oloc->pool_ns)
1942 ceph_encode_string(p, end, oloc->pool_ns->str,
1943 oloc->pool_ns->len);
1944 else
1945 ceph_encode_32(p, 0);
1946 }
1947
1948 static void encode_request_partial(struct ceph_osd_request *req,
1949 struct ceph_msg *msg)
1950 {
1951 void *p = msg->front.iov_base;
1952 void *const end = p + msg->front_alloc_len;
1953 u32 data_len = 0;
1954 int i;
1955
1956 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1957 /* snapshots aren't writeable */
1958 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1959 } else {
1960 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1961 req->r_data_offset || req->r_snapc);
1962 }
1963
1964 setup_request_data(req, msg);
1965
1966 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
1967 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
1968 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1969 ceph_encode_32(&p, req->r_flags);
1970
1971 /* reqid */
1972 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
1973 memset(p, 0, sizeof(struct ceph_osd_reqid));
1974 p += sizeof(struct ceph_osd_reqid);
1975
1976 /* trace */
1977 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
1978 p += sizeof(struct ceph_blkin_trace_info);
1979
1980 ceph_encode_32(&p, 0); /* client_inc, always 0 */
1981 ceph_encode_timespec64(p, &req->r_mtime);
1982 p += sizeof(struct ceph_timespec);
1983
1984 encode_oloc(&p, end, &req->r_t.target_oloc);
1985 ceph_encode_string(&p, end, req->r_t.target_oid.name,
1986 req->r_t.target_oid.name_len);
1987
1988 /* ops, can imply data */
1989 ceph_encode_16(&p, req->r_num_ops);
1990 for (i = 0; i < req->r_num_ops; i++) {
1991 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1992 p += sizeof(struct ceph_osd_op);
1993 }
1994
1995 ceph_encode_64(&p, req->r_snapid); /* snapid */
1996 if (req->r_snapc) {
1997 ceph_encode_64(&p, req->r_snapc->seq);
1998 ceph_encode_32(&p, req->r_snapc->num_snaps);
1999 for (i = 0; i < req->r_snapc->num_snaps; i++)
2000 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2001 } else {
2002 ceph_encode_64(&p, 0); /* snap_seq */
2003 ceph_encode_32(&p, 0); /* snaps len */
2004 }
2005
2006 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
2007 BUG_ON(p > end - 8); /* space for features */
2008
2009 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2010 /* front_len is finalized in encode_request_finish() */
2011 msg->front.iov_len = p - msg->front.iov_base;
2012 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2013 msg->hdr.data_len = cpu_to_le32(data_len);
2014 /*
2015 * The header "data_off" is a hint to the receiver allowing it
2016 * to align received data into its buffers such that there's no
2017 * need to re-copy it before writing it to disk (direct I/O).
2018 */
2019 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
2020
2021 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2022 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2023 }
2024
2025 static void encode_request_finish(struct ceph_msg *msg)
2026 {
2027 void *p = msg->front.iov_base;
2028 void *const partial_end = p + msg->front.iov_len;
2029 void *const end = p + msg->front_alloc_len;
2030
2031 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2032 /* luminous OSD -- encode features and be done */
2033 p = partial_end;
2034 ceph_encode_64(&p, msg->con->peer_features);
2035 } else {
2036 struct {
2037 char spgid[CEPH_ENCODING_START_BLK_LEN +
2038 CEPH_PGID_ENCODING_LEN + 1];
2039 __le32 hash;
2040 __le32 epoch;
2041 __le32 flags;
2042 char reqid[CEPH_ENCODING_START_BLK_LEN +
2043 sizeof(struct ceph_osd_reqid)];
2044 char trace[sizeof(struct ceph_blkin_trace_info)];
2045 __le32 client_inc;
2046 struct ceph_timespec mtime;
2047 } __packed head;
2048 struct ceph_pg pgid;
2049 void *oloc, *oid, *tail;
2050 int oloc_len, oid_len, tail_len;
2051 int len;
2052
2053 /*
2054 * Pre-luminous OSD -- reencode v8 into v4 using @head
2055 * as a temporary buffer. Encode the raw PG; the rest
2056 * is just a matter of moving oloc, oid and tail blobs
2057 * around.
2058 */
2059 memcpy(&head, p, sizeof(head));
2060 p += sizeof(head);
2061
2062 oloc = p;
2063 p += CEPH_ENCODING_START_BLK_LEN;
2064 pgid.pool = ceph_decode_64(&p);
2065 p += 4 + 4; /* preferred, key len */
2066 len = ceph_decode_32(&p);
2067 p += len; /* nspace */
2068 oloc_len = p - oloc;
2069
2070 oid = p;
2071 len = ceph_decode_32(&p);
2072 p += len;
2073 oid_len = p - oid;
2074
2075 tail = p;
2076 tail_len = partial_end - p;
2077
2078 p = msg->front.iov_base;
2079 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2080 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2081 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2082 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2083
2084 /* reassert_version */
2085 memset(p, 0, sizeof(struct ceph_eversion));
2086 p += sizeof(struct ceph_eversion);
2087
2088 BUG_ON(p >= oloc);
2089 memmove(p, oloc, oloc_len);
2090 p += oloc_len;
2091
2092 pgid.seed = le32_to_cpu(head.hash);
2093 encode_pgid(&p, &pgid); /* raw pg */
2094
2095 BUG_ON(p >= oid);
2096 memmove(p, oid, oid_len);
2097 p += oid_len;
2098
2099 /* tail -- ops, snapid, snapc, retry_attempt */
2100 BUG_ON(p >= tail);
2101 memmove(p, tail, tail_len);
2102 p += tail_len;
2103
2104 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2105 }
2106
2107 BUG_ON(p > end);
2108 msg->front.iov_len = p - msg->front.iov_base;
2109 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2110
2111 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2112 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2113 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2114 le16_to_cpu(msg->hdr.version));
2115 }
2116
2117 /*
2118 * @req has to be assigned a tid and registered.
2119 */
2120 static void send_request(struct ceph_osd_request *req)
2121 {
2122 struct ceph_osd *osd = req->r_osd;
2123
2124 verify_osd_locked(osd);
2125 WARN_ON(osd->o_osd != req->r_t.osd);
2126
2127 /* backoff? */
2128 if (should_plug_request(req))
2129 return;
2130
2131 /*
2132 * We may have a previously queued request message hanging
2133 * around. Cancel it to avoid corrupting the msgr.
2134 */
2135 if (req->r_sent)
2136 ceph_msg_revoke(req->r_request);
2137
2138 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2139 if (req->r_attempts)
2140 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2141 else
2142 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2143
2144 encode_request_partial(req, req->r_request);
2145
2146 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2147 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2148 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2149 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2150 req->r_attempts);
2151
2152 req->r_t.paused = false;
2153 req->r_stamp = jiffies;
2154 req->r_attempts++;
2155
2156 req->r_sent = osd->o_incarnation;
2157 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2158 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
2159 }
2160
2161 static void maybe_request_map(struct ceph_osd_client *osdc)
2162 {
2163 bool continuous = false;
2164
2165 verify_osdc_locked(osdc);
2166 WARN_ON(!osdc->osdmap->epoch);
2167
2168 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2169 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2170 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2171 dout("%s osdc %p continuous\n", __func__, osdc);
2172 continuous = true;
2173 } else {
2174 dout("%s osdc %p onetime\n", __func__, osdc);
2175 }
2176
2177 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2178 osdc->osdmap->epoch + 1, continuous))
2179 ceph_monc_renew_subs(&osdc->client->monc);
2180 }
2181
2182 static void complete_request(struct ceph_osd_request *req, int err);
2183 static void send_map_check(struct ceph_osd_request *req);
2184
2185 static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2186 {
2187 struct ceph_osd_client *osdc = req->r_osdc;
2188 struct ceph_osd *osd;
2189 enum calc_target_result ct_res;
2190 int err = 0;
2191 bool need_send = false;
2192 bool promoted = false;
2193
2194 WARN_ON(req->r_tid);
2195 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2196
2197 again:
2198 ct_res = calc_target(osdc, &req->r_t, NULL, false);
2199 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2200 goto promote;
2201
2202 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2203 if (IS_ERR(osd)) {
2204 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2205 goto promote;
2206 }
2207
2208 if (osdc->abort_err) {
2209 dout("req %p abort_err %d\n", req, osdc->abort_err);
2210 err = osdc->abort_err;
2211 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2212 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2213 osdc->epoch_barrier);
2214 req->r_t.paused = true;
2215 maybe_request_map(osdc);
2216 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2217 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2218 dout("req %p pausewr\n", req);
2219 req->r_t.paused = true;
2220 maybe_request_map(osdc);
2221 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2222 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2223 dout("req %p pauserd\n", req);
2224 req->r_t.paused = true;
2225 maybe_request_map(osdc);
2226 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2227 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2228 CEPH_OSD_FLAG_FULL_FORCE)) &&
2229 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2230 pool_full(osdc, req->r_t.base_oloc.pool))) {
2231 dout("req %p full/pool_full\n", req);
2232 if (osdc->abort_on_full) {
2233 err = -ENOSPC;
2234 } else {
2235 pr_warn_ratelimited("FULL or reached pool quota\n");
2236 req->r_t.paused = true;
2237 maybe_request_map(osdc);
2238 }
2239 } else if (!osd_homeless(osd)) {
2240 need_send = true;
2241 } else {
2242 maybe_request_map(osdc);
2243 }
2244
2245 mutex_lock(&osd->lock);
2246 /*
2247 * Assign the tid atomically with send_request() to protect
2248 * multiple writes to the same object from racing with each
2249 * other, resulting in out of order ops on the OSDs.
2250 */
2251 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2252 link_request(osd, req);
2253 if (need_send)
2254 send_request(req);
2255 else if (err)
2256 complete_request(req, err);
2257 mutex_unlock(&osd->lock);
2258
2259 if (!err && ct_res == CALC_TARGET_POOL_DNE)
2260 send_map_check(req);
2261
2262 if (promoted)
2263 downgrade_write(&osdc->lock);
2264 return;
2265
2266 promote:
2267 up_read(&osdc->lock);
2268 down_write(&osdc->lock);
2269 wrlocked = true;
2270 promoted = true;
2271 goto again;
2272 }
2273
2274 static void account_request(struct ceph_osd_request *req)
2275 {
2276 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
2277 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2278
2279 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2280 atomic_inc(&req->r_osdc->num_requests);
2281
2282 req->r_start_stamp = jiffies;
2283 }
2284
2285 static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2286 {
2287 ceph_osdc_get_request(req);
2288 account_request(req);
2289 __submit_request(req, wrlocked);
2290 }
2291
2292 static void finish_request(struct ceph_osd_request *req)
2293 {
2294 struct ceph_osd_client *osdc = req->r_osdc;
2295
2296 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2297 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2298
2299 if (req->r_osd)
2300 unlink_request(req->r_osd, req);
2301 atomic_dec(&osdc->num_requests);
2302
2303 /*
2304 * If an OSD has failed or returned and a request has been sent
2305 * twice, it's possible to get a reply and end up here while the
2306 * request message is queued for delivery. We will ignore the
2307 * reply, so not a big deal, but better to try and catch it.
2308 */
2309 ceph_msg_revoke(req->r_request);
2310 ceph_msg_revoke_incoming(req->r_reply);
2311 }
2312
2313 static void __complete_request(struct ceph_osd_request *req)
2314 {
2315 dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
2316 req->r_tid, req->r_callback, req->r_result);
2317
2318 if (req->r_callback)
2319 req->r_callback(req);
2320 complete_all(&req->r_completion);
2321 ceph_osdc_put_request(req);
2322 }
2323
2324 static void complete_request_workfn(struct work_struct *work)
2325 {
2326 struct ceph_osd_request *req =
2327 container_of(work, struct ceph_osd_request, r_complete_work);
2328
2329 __complete_request(req);
2330 }
2331
2332 /*
2333 * This is open-coded in handle_reply().
2334 */
2335 static void complete_request(struct ceph_osd_request *req, int err)
2336 {
2337 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2338
2339 req->r_result = err;
2340 finish_request(req);
2341
2342 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2343 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
2344 }
2345
2346 static void cancel_map_check(struct ceph_osd_request *req)
2347 {
2348 struct ceph_osd_client *osdc = req->r_osdc;
2349 struct ceph_osd_request *lookup_req;
2350
2351 verify_osdc_wrlocked(osdc);
2352
2353 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2354 if (!lookup_req)
2355 return;
2356
2357 WARN_ON(lookup_req != req);
2358 erase_request_mc(&osdc->map_checks, req);
2359 ceph_osdc_put_request(req);
2360 }
2361
2362 static void cancel_request(struct ceph_osd_request *req)
2363 {
2364 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2365
2366 cancel_map_check(req);
2367 finish_request(req);
2368 complete_all(&req->r_completion);
2369 ceph_osdc_put_request(req);
2370 }
2371
2372 static void abort_request(struct ceph_osd_request *req, int err)
2373 {
2374 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2375
2376 cancel_map_check(req);
2377 complete_request(req, err);
2378 }
2379
2380 static int abort_fn(struct ceph_osd_request *req, void *arg)
2381 {
2382 int err = *(int *)arg;
2383
2384 abort_request(req, err);
2385 return 0; /* continue iteration */
2386 }
2387
2388 /*
2389 * Abort all in-flight requests with @err and arrange for all future
2390 * requests to be failed immediately.
2391 */
2392 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2393 {
2394 dout("%s osdc %p err %d\n", __func__, osdc, err);
2395 down_write(&osdc->lock);
2396 for_each_request(osdc, abort_fn, &err);
2397 osdc->abort_err = err;
2398 up_write(&osdc->lock);
2399 }
2400 EXPORT_SYMBOL(ceph_osdc_abort_requests);
2401
2402 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2403 {
2404 if (likely(eb > osdc->epoch_barrier)) {
2405 dout("updating epoch_barrier from %u to %u\n",
2406 osdc->epoch_barrier, eb);
2407 osdc->epoch_barrier = eb;
2408 /* Request map if we're not to the barrier yet */
2409 if (eb > osdc->osdmap->epoch)
2410 maybe_request_map(osdc);
2411 }
2412 }
2413
2414 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2415 {
2416 down_read(&osdc->lock);
2417 if (unlikely(eb > osdc->epoch_barrier)) {
2418 up_read(&osdc->lock);
2419 down_write(&osdc->lock);
2420 update_epoch_barrier(osdc, eb);
2421 up_write(&osdc->lock);
2422 } else {
2423 up_read(&osdc->lock);
2424 }
2425 }
2426 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2427
2428 /*
2429 * We can end up releasing caps as a result of abort_request().
2430 * In that case, we probably want to ensure that the cap release message
2431 * has an updated epoch barrier in it, so set the epoch barrier prior to
2432 * aborting the first request.
2433 */
2434 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2435 {
2436 struct ceph_osd_client *osdc = req->r_osdc;
2437 bool *victims = arg;
2438
2439 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2440 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2441 pool_full(osdc, req->r_t.base_oloc.pool))) {
2442 if (!*victims) {
2443 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2444 *victims = true;
2445 }
2446 abort_request(req, -ENOSPC);
2447 }
2448
2449 return 0; /* continue iteration */
2450 }
2451
2452 /*
2453 * Drop all pending requests that are stalled waiting on a full condition to
2454 * clear, and complete them with ENOSPC as the return code. Set the
2455 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2456 * cancelled.
2457 */
2458 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2459 {
2460 bool victims = false;
2461
2462 if (osdc->abort_on_full &&
2463 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
2464 for_each_request(osdc, abort_on_full_fn, &victims);
2465 }
2466
2467 static void check_pool_dne(struct ceph_osd_request *req)
2468 {
2469 struct ceph_osd_client *osdc = req->r_osdc;
2470 struct ceph_osdmap *map = osdc->osdmap;
2471
2472 verify_osdc_wrlocked(osdc);
2473 WARN_ON(!map->epoch);
2474
2475 if (req->r_attempts) {
2476 /*
2477 * We sent a request earlier, which means that
2478 * previously the pool existed, and now it does not
2479 * (i.e., it was deleted).
2480 */
2481 req->r_map_dne_bound = map->epoch;
2482 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2483 req->r_tid);
2484 } else {
2485 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2486 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2487 }
2488
2489 if (req->r_map_dne_bound) {
2490 if (map->epoch >= req->r_map_dne_bound) {
2491 /* we had a new enough map */
2492 pr_info_ratelimited("tid %llu pool does not exist\n",
2493 req->r_tid);
2494 complete_request(req, -ENOENT);
2495 }
2496 } else {
2497 send_map_check(req);
2498 }
2499 }
2500
2501 static void map_check_cb(struct ceph_mon_generic_request *greq)
2502 {
2503 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2504 struct ceph_osd_request *req;
2505 u64 tid = greq->private_data;
2506
2507 WARN_ON(greq->result || !greq->u.newest);
2508
2509 down_write(&osdc->lock);
2510 req = lookup_request_mc(&osdc->map_checks, tid);
2511 if (!req) {
2512 dout("%s tid %llu dne\n", __func__, tid);
2513 goto out_unlock;
2514 }
2515
2516 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2517 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2518 if (!req->r_map_dne_bound)
2519 req->r_map_dne_bound = greq->u.newest;
2520 erase_request_mc(&osdc->map_checks, req);
2521 check_pool_dne(req);
2522
2523 ceph_osdc_put_request(req);
2524 out_unlock:
2525 up_write(&osdc->lock);
2526 }
2527
2528 static void send_map_check(struct ceph_osd_request *req)
2529 {
2530 struct ceph_osd_client *osdc = req->r_osdc;
2531 struct ceph_osd_request *lookup_req;
2532 int ret;
2533
2534 verify_osdc_wrlocked(osdc);
2535
2536 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2537 if (lookup_req) {
2538 WARN_ON(lookup_req != req);
2539 return;
2540 }
2541
2542 ceph_osdc_get_request(req);
2543 insert_request_mc(&osdc->map_checks, req);
2544 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2545 map_check_cb, req->r_tid);
2546 WARN_ON(ret);
2547 }
2548
2549 /*
2550 * lingering requests, watch/notify v2 infrastructure
2551 */
2552 static void linger_release(struct kref *kref)
2553 {
2554 struct ceph_osd_linger_request *lreq =
2555 container_of(kref, struct ceph_osd_linger_request, kref);
2556
2557 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2558 lreq->reg_req, lreq->ping_req);
2559 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2560 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
2561 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2562 WARN_ON(!list_empty(&lreq->scan_item));
2563 WARN_ON(!list_empty(&lreq->pending_lworks));
2564 WARN_ON(lreq->osd);
2565
2566 if (lreq->reg_req)
2567 ceph_osdc_put_request(lreq->reg_req);
2568 if (lreq->ping_req)
2569 ceph_osdc_put_request(lreq->ping_req);
2570 target_destroy(&lreq->t);
2571 kfree(lreq);
2572 }
2573
2574 static void linger_put(struct ceph_osd_linger_request *lreq)
2575 {
2576 if (lreq)
2577 kref_put(&lreq->kref, linger_release);
2578 }
2579
2580 static struct ceph_osd_linger_request *
2581 linger_get(struct ceph_osd_linger_request *lreq)
2582 {
2583 kref_get(&lreq->kref);
2584 return lreq;
2585 }
2586
2587 static struct ceph_osd_linger_request *
2588 linger_alloc(struct ceph_osd_client *osdc)
2589 {
2590 struct ceph_osd_linger_request *lreq;
2591
2592 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2593 if (!lreq)
2594 return NULL;
2595
2596 kref_init(&lreq->kref);
2597 mutex_init(&lreq->lock);
2598 RB_CLEAR_NODE(&lreq->node);
2599 RB_CLEAR_NODE(&lreq->osdc_node);
2600 RB_CLEAR_NODE(&lreq->mc_node);
2601 INIT_LIST_HEAD(&lreq->scan_item);
2602 INIT_LIST_HEAD(&lreq->pending_lworks);
2603 init_completion(&lreq->reg_commit_wait);
2604 init_completion(&lreq->notify_finish_wait);
2605
2606 lreq->osdc = osdc;
2607 target_init(&lreq->t);
2608
2609 dout("%s lreq %p\n", __func__, lreq);
2610 return lreq;
2611 }
2612
2613 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2614 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
2615 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2616
2617 /*
2618 * Create linger request <-> OSD session relation.
2619 *
2620 * @lreq has to be registered, @osd may be homeless.
2621 */
2622 static void link_linger(struct ceph_osd *osd,
2623 struct ceph_osd_linger_request *lreq)
2624 {
2625 verify_osd_locked(osd);
2626 WARN_ON(!lreq->linger_id || lreq->osd);
2627 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2628 osd->o_osd, lreq, lreq->linger_id);
2629
2630 if (!osd_homeless(osd))
2631 __remove_osd_from_lru(osd);
2632 else
2633 atomic_inc(&osd->o_osdc->num_homeless);
2634
2635 get_osd(osd);
2636 insert_linger(&osd->o_linger_requests, lreq);
2637 lreq->osd = osd;
2638 }
2639
2640 static void unlink_linger(struct ceph_osd *osd,
2641 struct ceph_osd_linger_request *lreq)
2642 {
2643 verify_osd_locked(osd);
2644 WARN_ON(lreq->osd != osd);
2645 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2646 osd->o_osd, lreq, lreq->linger_id);
2647
2648 lreq->osd = NULL;
2649 erase_linger(&osd->o_linger_requests, lreq);
2650 put_osd(osd);
2651
2652 if (!osd_homeless(osd))
2653 maybe_move_osd_to_lru(osd);
2654 else
2655 atomic_dec(&osd->o_osdc->num_homeless);
2656 }
2657
2658 static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2659 {
2660 verify_osdc_locked(lreq->osdc);
2661
2662 return !RB_EMPTY_NODE(&lreq->osdc_node);
2663 }
2664
2665 static bool linger_registered(struct ceph_osd_linger_request *lreq)
2666 {
2667 struct ceph_osd_client *osdc = lreq->osdc;
2668 bool registered;
2669
2670 down_read(&osdc->lock);
2671 registered = __linger_registered(lreq);
2672 up_read(&osdc->lock);
2673
2674 return registered;
2675 }
2676
2677 static void linger_register(struct ceph_osd_linger_request *lreq)
2678 {
2679 struct ceph_osd_client *osdc = lreq->osdc;
2680
2681 verify_osdc_wrlocked(osdc);
2682 WARN_ON(lreq->linger_id);
2683
2684 linger_get(lreq);
2685 lreq->linger_id = ++osdc->last_linger_id;
2686 insert_linger_osdc(&osdc->linger_requests, lreq);
2687 }
2688
2689 static void linger_unregister(struct ceph_osd_linger_request *lreq)
2690 {
2691 struct ceph_osd_client *osdc = lreq->osdc;
2692
2693 verify_osdc_wrlocked(osdc);
2694
2695 erase_linger_osdc(&osdc->linger_requests, lreq);
2696 linger_put(lreq);
2697 }
2698
2699 static void cancel_linger_request(struct ceph_osd_request *req)
2700 {
2701 struct ceph_osd_linger_request *lreq = req->r_priv;
2702
2703 WARN_ON(!req->r_linger);
2704 cancel_request(req);
2705 linger_put(lreq);
2706 }
2707
2708 struct linger_work {
2709 struct work_struct work;
2710 struct ceph_osd_linger_request *lreq;
2711 struct list_head pending_item;
2712 unsigned long queued_stamp;
2713
2714 union {
2715 struct {
2716 u64 notify_id;
2717 u64 notifier_id;
2718 void *payload; /* points into @msg front */
2719 size_t payload_len;
2720
2721 struct ceph_msg *msg; /* for ceph_msg_put() */
2722 } notify;
2723 struct {
2724 int err;
2725 } error;
2726 };
2727 };
2728
2729 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2730 work_func_t workfn)
2731 {
2732 struct linger_work *lwork;
2733
2734 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2735 if (!lwork)
2736 return NULL;
2737
2738 INIT_WORK(&lwork->work, workfn);
2739 INIT_LIST_HEAD(&lwork->pending_item);
2740 lwork->lreq = linger_get(lreq);
2741
2742 return lwork;
2743 }
2744
2745 static void lwork_free(struct linger_work *lwork)
2746 {
2747 struct ceph_osd_linger_request *lreq = lwork->lreq;
2748
2749 mutex_lock(&lreq->lock);
2750 list_del(&lwork->pending_item);
2751 mutex_unlock(&lreq->lock);
2752
2753 linger_put(lreq);
2754 kfree(lwork);
2755 }
2756
2757 static void lwork_queue(struct linger_work *lwork)
2758 {
2759 struct ceph_osd_linger_request *lreq = lwork->lreq;
2760 struct ceph_osd_client *osdc = lreq->osdc;
2761
2762 verify_lreq_locked(lreq);
2763 WARN_ON(!list_empty(&lwork->pending_item));
2764
2765 lwork->queued_stamp = jiffies;
2766 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2767 queue_work(osdc->notify_wq, &lwork->work);
2768 }
2769
2770 static void do_watch_notify(struct work_struct *w)
2771 {
2772 struct linger_work *lwork = container_of(w, struct linger_work, work);
2773 struct ceph_osd_linger_request *lreq = lwork->lreq;
2774
2775 if (!linger_registered(lreq)) {
2776 dout("%s lreq %p not registered\n", __func__, lreq);
2777 goto out;
2778 }
2779
2780 WARN_ON(!lreq->is_watch);
2781 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2782 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2783 lwork->notify.payload_len);
2784 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2785 lwork->notify.notifier_id, lwork->notify.payload,
2786 lwork->notify.payload_len);
2787
2788 out:
2789 ceph_msg_put(lwork->notify.msg);
2790 lwork_free(lwork);
2791 }
2792
2793 static void do_watch_error(struct work_struct *w)
2794 {
2795 struct linger_work *lwork = container_of(w, struct linger_work, work);
2796 struct ceph_osd_linger_request *lreq = lwork->lreq;
2797
2798 if (!linger_registered(lreq)) {
2799 dout("%s lreq %p not registered\n", __func__, lreq);
2800 goto out;
2801 }
2802
2803 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2804 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2805
2806 out:
2807 lwork_free(lwork);
2808 }
2809
2810 static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2811 {
2812 struct linger_work *lwork;
2813
2814 lwork = lwork_alloc(lreq, do_watch_error);
2815 if (!lwork) {
2816 pr_err("failed to allocate error-lwork\n");
2817 return;
2818 }
2819
2820 lwork->error.err = lreq->last_error;
2821 lwork_queue(lwork);
2822 }
2823
2824 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2825 int result)
2826 {
2827 if (!completion_done(&lreq->reg_commit_wait)) {
2828 lreq->reg_commit_error = (result <= 0 ? result : 0);
2829 complete_all(&lreq->reg_commit_wait);
2830 }
2831 }
2832
2833 static void linger_commit_cb(struct ceph_osd_request *req)
2834 {
2835 struct ceph_osd_linger_request *lreq = req->r_priv;
2836
2837 mutex_lock(&lreq->lock);
2838 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2839 lreq->linger_id, req->r_result);
2840 linger_reg_commit_complete(lreq, req->r_result);
2841 lreq->committed = true;
2842
2843 if (!lreq->is_watch) {
2844 struct ceph_osd_data *osd_data =
2845 osd_req_op_data(req, 0, notify, response_data);
2846 void *p = page_address(osd_data->pages[0]);
2847
2848 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2849 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2850
2851 /* make note of the notify_id */
2852 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2853 lreq->notify_id = ceph_decode_64(&p);
2854 dout("lreq %p notify_id %llu\n", lreq,
2855 lreq->notify_id);
2856 } else {
2857 dout("lreq %p no notify_id\n", lreq);
2858 }
2859 }
2860
2861 mutex_unlock(&lreq->lock);
2862 linger_put(lreq);
2863 }
2864
2865 static int normalize_watch_error(int err)
2866 {
2867 /*
2868 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2869 * notification and a failure to reconnect because we raced with
2870 * the delete appear the same to the user.
2871 */
2872 if (err == -ENOENT)
2873 err = -ENOTCONN;
2874
2875 return err;
2876 }
2877
2878 static void linger_reconnect_cb(struct ceph_osd_request *req)
2879 {
2880 struct ceph_osd_linger_request *lreq = req->r_priv;
2881
2882 mutex_lock(&lreq->lock);
2883 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2884 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2885 if (req->r_result < 0) {
2886 if (!lreq->last_error) {
2887 lreq->last_error = normalize_watch_error(req->r_result);
2888 queue_watch_error(lreq);
2889 }
2890 }
2891
2892 mutex_unlock(&lreq->lock);
2893 linger_put(lreq);
2894 }
2895
2896 static void send_linger(struct ceph_osd_linger_request *lreq)
2897 {
2898 struct ceph_osd_request *req = lreq->reg_req;
2899 struct ceph_osd_req_op *op = &req->r_ops[0];
2900
2901 verify_osdc_wrlocked(req->r_osdc);
2902 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2903
2904 if (req->r_osd)
2905 cancel_linger_request(req);
2906
2907 request_reinit(req);
2908 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2909 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2910 req->r_flags = lreq->t.flags;
2911 req->r_mtime = lreq->mtime;
2912
2913 mutex_lock(&lreq->lock);
2914 if (lreq->is_watch && lreq->committed) {
2915 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2916 op->watch.cookie != lreq->linger_id);
2917 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2918 op->watch.gen = ++lreq->register_gen;
2919 dout("lreq %p reconnect register_gen %u\n", lreq,
2920 op->watch.gen);
2921 req->r_callback = linger_reconnect_cb;
2922 } else {
2923 if (!lreq->is_watch)
2924 lreq->notify_id = 0;
2925 else
2926 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
2927 dout("lreq %p register\n", lreq);
2928 req->r_callback = linger_commit_cb;
2929 }
2930 mutex_unlock(&lreq->lock);
2931
2932 req->r_priv = linger_get(lreq);
2933 req->r_linger = true;
2934
2935 submit_request(req, true);
2936 }
2937
2938 static void linger_ping_cb(struct ceph_osd_request *req)
2939 {
2940 struct ceph_osd_linger_request *lreq = req->r_priv;
2941
2942 mutex_lock(&lreq->lock);
2943 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
2944 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
2945 lreq->last_error);
2946 if (lreq->register_gen == req->r_ops[0].watch.gen) {
2947 if (!req->r_result) {
2948 lreq->watch_valid_thru = lreq->ping_sent;
2949 } else if (!lreq->last_error) {
2950 lreq->last_error = normalize_watch_error(req->r_result);
2951 queue_watch_error(lreq);
2952 }
2953 } else {
2954 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
2955 lreq->register_gen, req->r_ops[0].watch.gen);
2956 }
2957
2958 mutex_unlock(&lreq->lock);
2959 linger_put(lreq);
2960 }
2961
2962 static void send_linger_ping(struct ceph_osd_linger_request *lreq)
2963 {
2964 struct ceph_osd_client *osdc = lreq->osdc;
2965 struct ceph_osd_request *req = lreq->ping_req;
2966 struct ceph_osd_req_op *op = &req->r_ops[0];
2967
2968 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2969 dout("%s PAUSERD\n", __func__);
2970 return;
2971 }
2972
2973 lreq->ping_sent = jiffies;
2974 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
2975 __func__, lreq, lreq->linger_id, lreq->ping_sent,
2976 lreq->register_gen);
2977
2978 if (req->r_osd)
2979 cancel_linger_request(req);
2980
2981 request_reinit(req);
2982 target_copy(&req->r_t, &lreq->t);
2983
2984 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2985 op->watch.cookie != lreq->linger_id ||
2986 op->watch.op != CEPH_OSD_WATCH_OP_PING);
2987 op->watch.gen = lreq->register_gen;
2988 req->r_callback = linger_ping_cb;
2989 req->r_priv = linger_get(lreq);
2990 req->r_linger = true;
2991
2992 ceph_osdc_get_request(req);
2993 account_request(req);
2994 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2995 link_request(lreq->osd, req);
2996 send_request(req);
2997 }
2998
2999 static void linger_submit(struct ceph_osd_linger_request *lreq)
3000 {
3001 struct ceph_osd_client *osdc = lreq->osdc;
3002 struct ceph_osd *osd;
3003
3004 calc_target(osdc, &lreq->t, NULL, false);
3005 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3006 link_linger(osd, lreq);
3007
3008 send_linger(lreq);
3009 }
3010
3011 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3012 {
3013 struct ceph_osd_client *osdc = lreq->osdc;
3014 struct ceph_osd_linger_request *lookup_lreq;
3015
3016 verify_osdc_wrlocked(osdc);
3017
3018 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3019 lreq->linger_id);
3020 if (!lookup_lreq)
3021 return;
3022
3023 WARN_ON(lookup_lreq != lreq);
3024 erase_linger_mc(&osdc->linger_map_checks, lreq);
3025 linger_put(lreq);
3026 }
3027
3028 /*
3029 * @lreq has to be both registered and linked.
3030 */
3031 static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3032 {
3033 if (lreq->is_watch && lreq->ping_req->r_osd)
3034 cancel_linger_request(lreq->ping_req);
3035 if (lreq->reg_req->r_osd)
3036 cancel_linger_request(lreq->reg_req);
3037 cancel_linger_map_check(lreq);
3038 unlink_linger(lreq->osd, lreq);
3039 linger_unregister(lreq);
3040 }
3041
3042 static void linger_cancel(struct ceph_osd_linger_request *lreq)
3043 {
3044 struct ceph_osd_client *osdc = lreq->osdc;
3045
3046 down_write(&osdc->lock);
3047 if (__linger_registered(lreq))
3048 __linger_cancel(lreq);
3049 up_write(&osdc->lock);
3050 }
3051
3052 static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3053
3054 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3055 {
3056 struct ceph_osd_client *osdc = lreq->osdc;
3057 struct ceph_osdmap *map = osdc->osdmap;
3058
3059 verify_osdc_wrlocked(osdc);
3060 WARN_ON(!map->epoch);
3061
3062 if (lreq->register_gen) {
3063 lreq->map_dne_bound = map->epoch;
3064 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3065 lreq, lreq->linger_id);
3066 } else {
3067 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3068 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3069 map->epoch);
3070 }
3071
3072 if (lreq->map_dne_bound) {
3073 if (map->epoch >= lreq->map_dne_bound) {
3074 /* we had a new enough map */
3075 pr_info("linger_id %llu pool does not exist\n",
3076 lreq->linger_id);
3077 linger_reg_commit_complete(lreq, -ENOENT);
3078 __linger_cancel(lreq);
3079 }
3080 } else {
3081 send_linger_map_check(lreq);
3082 }
3083 }
3084
3085 static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3086 {
3087 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3088 struct ceph_osd_linger_request *lreq;
3089 u64 linger_id = greq->private_data;
3090
3091 WARN_ON(greq->result || !greq->u.newest);
3092
3093 down_write(&osdc->lock);
3094 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3095 if (!lreq) {
3096 dout("%s linger_id %llu dne\n", __func__, linger_id);
3097 goto out_unlock;
3098 }
3099
3100 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3101 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3102 greq->u.newest);
3103 if (!lreq->map_dne_bound)
3104 lreq->map_dne_bound = greq->u.newest;
3105 erase_linger_mc(&osdc->linger_map_checks, lreq);
3106 check_linger_pool_dne(lreq);
3107
3108 linger_put(lreq);
3109 out_unlock:
3110 up_write(&osdc->lock);
3111 }
3112
3113 static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3114 {
3115 struct ceph_osd_client *osdc = lreq->osdc;
3116 struct ceph_osd_linger_request *lookup_lreq;
3117 int ret;
3118
3119 verify_osdc_wrlocked(osdc);
3120
3121 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3122 lreq->linger_id);
3123 if (lookup_lreq) {
3124 WARN_ON(lookup_lreq != lreq);
3125 return;
3126 }
3127
3128 linger_get(lreq);
3129 insert_linger_mc(&osdc->linger_map_checks, lreq);
3130 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3131 linger_map_check_cb, lreq->linger_id);
3132 WARN_ON(ret);
3133 }
3134
3135 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3136 {
3137 int ret;
3138
3139 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3140 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3141 return ret ?: lreq->reg_commit_error;
3142 }
3143
3144 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3145 {
3146 int ret;
3147
3148 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3149 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3150 return ret ?: lreq->notify_finish_error;
3151 }
3152
3153 /*
3154 * Timeout callback, called every N seconds. When 1 or more OSD
3155 * requests has been active for more than N seconds, we send a keepalive
3156 * (tag + timestamp) to its OSD to ensure any communications channel
3157 * reset is detected.
3158 */
3159 static void handle_timeout(struct work_struct *work)
3160 {
3161 struct ceph_osd_client *osdc =
3162 container_of(work, struct ceph_osd_client, timeout_work.work);
3163 struct ceph_options *opts = osdc->client->options;
3164 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3165 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3166 LIST_HEAD(slow_osds);
3167 struct rb_node *n, *p;
3168
3169 dout("%s osdc %p\n", __func__, osdc);
3170 down_write(&osdc->lock);
3171
3172 /*
3173 * ping osds that are a bit slow. this ensures that if there
3174 * is a break in the TCP connection we will notice, and reopen
3175 * a connection with that osd (from the fault callback).
3176 */
3177 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3178 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3179 bool found = false;
3180
3181 for (p = rb_first(&osd->o_requests); p; ) {
3182 struct ceph_osd_request *req =
3183 rb_entry(p, struct ceph_osd_request, r_node);
3184
3185 p = rb_next(p); /* abort_request() */
3186
3187 if (time_before(req->r_stamp, cutoff)) {
3188 dout(" req %p tid %llu on osd%d is laggy\n",
3189 req, req->r_tid, osd->o_osd);
3190 found = true;
3191 }
3192 if (opts->osd_request_timeout &&
3193 time_before(req->r_start_stamp, expiry_cutoff)) {
3194 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3195 req->r_tid, osd->o_osd);
3196 abort_request(req, -ETIMEDOUT);
3197 }
3198 }
3199 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3200 struct ceph_osd_linger_request *lreq =
3201 rb_entry(p, struct ceph_osd_linger_request, node);
3202
3203 dout(" lreq %p linger_id %llu is served by osd%d\n",
3204 lreq, lreq->linger_id, osd->o_osd);
3205 found = true;
3206
3207 mutex_lock(&lreq->lock);
3208 if (lreq->is_watch && lreq->committed && !lreq->last_error)
3209 send_linger_ping(lreq);
3210 mutex_unlock(&lreq->lock);
3211 }
3212
3213 if (found)
3214 list_move_tail(&osd->o_keepalive_item, &slow_osds);
3215 }
3216
3217 if (opts->osd_request_timeout) {
3218 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3219 struct ceph_osd_request *req =
3220 rb_entry(p, struct ceph_osd_request, r_node);
3221
3222 p = rb_next(p); /* abort_request() */
3223
3224 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3225 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3226 req->r_tid, osdc->homeless_osd.o_osd);
3227 abort_request(req, -ETIMEDOUT);
3228 }
3229 }
3230 }
3231
3232 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3233 maybe_request_map(osdc);
3234
3235 while (!list_empty(&slow_osds)) {
3236 struct ceph_osd *osd = list_first_entry(&slow_osds,
3237 struct ceph_osd,
3238 o_keepalive_item);
3239 list_del_init(&osd->o_keepalive_item);
3240 ceph_con_keepalive(&osd->o_con);
3241 }
3242
3243 up_write(&osdc->lock);
3244 schedule_delayed_work(&osdc->timeout_work,
3245 osdc->client->options->osd_keepalive_timeout);
3246 }
3247
3248 static void handle_osds_timeout(struct work_struct *work)
3249 {
3250 struct ceph_osd_client *osdc =
3251 container_of(work, struct ceph_osd_client,
3252 osds_timeout_work.work);
3253 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3254 struct ceph_osd *osd, *nosd;
3255
3256 dout("%s osdc %p\n", __func__, osdc);
3257 down_write(&osdc->lock);
3258 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3259 if (time_before(jiffies, osd->lru_ttl))
3260 break;
3261
3262 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3263 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3264 close_osd(osd);
3265 }
3266
3267 up_write(&osdc->lock);
3268 schedule_delayed_work(&osdc->osds_timeout_work,
3269 round_jiffies_relative(delay));
3270 }
3271
3272 static int ceph_oloc_decode(void **p, void *end,
3273 struct ceph_object_locator *oloc)
3274 {
3275 u8 struct_v, struct_cv;
3276 u32 len;
3277 void *struct_end;
3278 int ret = 0;
3279
3280 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3281 struct_v = ceph_decode_8(p);
3282 struct_cv = ceph_decode_8(p);
3283 if (struct_v < 3) {
3284 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3285 struct_v, struct_cv);
3286 goto e_inval;
3287 }
3288 if (struct_cv > 6) {
3289 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3290 struct_v, struct_cv);
3291 goto e_inval;
3292 }
3293 len = ceph_decode_32(p);
3294 ceph_decode_need(p, end, len, e_inval);
3295 struct_end = *p + len;
3296
3297 oloc->pool = ceph_decode_64(p);
3298 *p += 4; /* skip preferred */
3299
3300 len = ceph_decode_32(p);
3301 if (len > 0) {
3302 pr_warn("ceph_object_locator::key is set\n");
3303 goto e_inval;
3304 }
3305
3306 if (struct_v >= 5) {
3307 bool changed = false;
3308
3309 len = ceph_decode_32(p);
3310 if (len > 0) {
3311 ceph_decode_need(p, end, len, e_inval);
3312 if (!oloc->pool_ns ||
3313 ceph_compare_string(oloc->pool_ns, *p, len))
3314 changed = true;
3315 *p += len;
3316 } else {
3317 if (oloc->pool_ns)
3318 changed = true;
3319 }
3320 if (changed) {
3321 /* redirect changes namespace */
3322 pr_warn("ceph_object_locator::nspace is changed\n");
3323 goto e_inval;
3324 }
3325 }
3326
3327 if (struct_v >= 6) {
3328 s64 hash = ceph_decode_64(p);
3329 if (hash != -1) {
3330 pr_warn("ceph_object_locator::hash is set\n");
3331 goto e_inval;
3332 }
3333 }
3334
3335 /* skip the rest */
3336 *p = struct_end;
3337 out:
3338 return ret;
3339
3340 e_inval:
3341 ret = -EINVAL;
3342 goto out;
3343 }
3344
3345 static int ceph_redirect_decode(void **p, void *end,
3346 struct ceph_request_redirect *redir)
3347 {
3348 u8 struct_v, struct_cv;
3349 u32 len;
3350 void *struct_end;
3351 int ret;
3352
3353 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3354 struct_v = ceph_decode_8(p);
3355 struct_cv = ceph_decode_8(p);
3356 if (struct_cv > 1) {
3357 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3358 struct_v, struct_cv);
3359 goto e_inval;
3360 }
3361 len = ceph_decode_32(p);
3362 ceph_decode_need(p, end, len, e_inval);
3363 struct_end = *p + len;
3364
3365 ret = ceph_oloc_decode(p, end, &redir->oloc);
3366 if (ret)
3367 goto out;
3368
3369 len = ceph_decode_32(p);
3370 if (len > 0) {
3371 pr_warn("ceph_request_redirect::object_name is set\n");
3372 goto e_inval;
3373 }
3374
3375 len = ceph_decode_32(p);
3376 *p += len; /* skip osd_instructions */
3377
3378 /* skip the rest */
3379 *p = struct_end;
3380 out:
3381 return ret;
3382
3383 e_inval:
3384 ret = -EINVAL;
3385 goto out;
3386 }
3387
3388 struct MOSDOpReply {
3389 struct ceph_pg pgid;
3390 u64 flags;
3391 int result;
3392 u32 epoch;
3393 int num_ops;
3394 u32 outdata_len[CEPH_OSD_MAX_OPS];
3395 s32 rval[CEPH_OSD_MAX_OPS];
3396 int retry_attempt;
3397 struct ceph_eversion replay_version;
3398 u64 user_version;
3399 struct ceph_request_redirect redirect;
3400 };
3401
3402 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
3403 {
3404 void *p = msg->front.iov_base;
3405 void *const end = p + msg->front.iov_len;
3406 u16 version = le16_to_cpu(msg->hdr.version);
3407 struct ceph_eversion bad_replay_version;
3408 u8 decode_redir;
3409 u32 len;
3410 int ret;
3411 int i;
3412
3413 ceph_decode_32_safe(&p, end, len, e_inval);
3414 ceph_decode_need(&p, end, len, e_inval);
3415 p += len; /* skip oid */
3416
3417 ret = ceph_decode_pgid(&p, end, &m->pgid);
3418 if (ret)
3419 return ret;
3420
3421 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3422 ceph_decode_32_safe(&p, end, m->result, e_inval);
3423 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3424 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3425 p += sizeof(bad_replay_version);
3426 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
3427
3428 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3429 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3430 goto e_inval;
3431
3432 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3433 e_inval);
3434 for (i = 0; i < m->num_ops; i++) {
3435 struct ceph_osd_op *op = p;
3436
3437 m->outdata_len[i] = le32_to_cpu(op->payload_len);
3438 p += sizeof(*op);
3439 }
3440
3441 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3442 for (i = 0; i < m->num_ops; i++)
3443 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
3444
3445 if (version >= 5) {
3446 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3447 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3448 p += sizeof(m->replay_version);
3449 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3450 } else {
3451 m->replay_version = bad_replay_version; /* struct */
3452 m->user_version = le64_to_cpu(m->replay_version.version);
3453 }
3454
3455 if (version >= 6) {
3456 if (version >= 7)
3457 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
3458 else
3459 decode_redir = 1;
3460 } else {
3461 decode_redir = 0;
3462 }
3463
3464 if (decode_redir) {
3465 ret = ceph_redirect_decode(&p, end, &m->redirect);
3466 if (ret)
3467 return ret;
3468 } else {
3469 ceph_oloc_init(&m->redirect.oloc);
3470 }
3471
3472 return 0;
3473
3474 e_inval:
3475 return -EINVAL;
3476 }
3477
3478 /*
3479 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3480 * specified.
3481 */
3482 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3483 {
3484 struct ceph_osd_client *osdc = osd->o_osdc;
3485 struct ceph_osd_request *req;
3486 struct MOSDOpReply m;
3487 u64 tid = le64_to_cpu(msg->hdr.tid);
3488 u32 data_len = 0;
3489 int ret;
3490 int i;
3491
3492 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3493
3494 down_read(&osdc->lock);
3495 if (!osd_registered(osd)) {
3496 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3497 goto out_unlock_osdc;
3498 }
3499 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3500
3501 mutex_lock(&osd->lock);
3502 req = lookup_request(&osd->o_requests, tid);
3503 if (!req) {
3504 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3505 goto out_unlock_session;
3506 }
3507
3508 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3509 ret = decode_MOSDOpReply(msg, &m);
3510 m.redirect.oloc.pool_ns = NULL;
3511 if (ret) {
3512 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3513 req->r_tid, ret);
3514 ceph_msg_dump(msg);
3515 goto fail_request;
3516 }
3517 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3518 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3519 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3520 le64_to_cpu(m.replay_version.version), m.user_version);
3521
3522 if (m.retry_attempt >= 0) {
3523 if (m.retry_attempt != req->r_attempts - 1) {
3524 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3525 req, req->r_tid, m.retry_attempt,
3526 req->r_attempts - 1);
3527 goto out_unlock_session;
3528 }
3529 } else {
3530 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3531 }
3532
3533 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3534 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3535 m.redirect.oloc.pool);
3536 unlink_request(osd, req);
3537 mutex_unlock(&osd->lock);
3538
3539 /*
3540 * Not ceph_oloc_copy() - changing pool_ns is not
3541 * supported.
3542 */
3543 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3544 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
3545 req->r_tid = 0;
3546 __submit_request(req, false);
3547 goto out_unlock_osdc;
3548 }
3549
3550 if (m.num_ops != req->r_num_ops) {
3551 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3552 req->r_num_ops, req->r_tid);
3553 goto fail_request;
3554 }
3555 for (i = 0; i < req->r_num_ops; i++) {
3556 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3557 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3558 req->r_ops[i].rval = m.rval[i];
3559 req->r_ops[i].outdata_len = m.outdata_len[i];
3560 data_len += m.outdata_len[i];
3561 }
3562 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3563 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3564 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3565 goto fail_request;
3566 }
3567 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3568 req, req->r_tid, m.result, data_len);
3569
3570 /*
3571 * Since we only ever request ONDISK, we should only ever get
3572 * one (type of) reply back.
3573 */
3574 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3575 req->r_result = m.result ?: data_len;
3576 finish_request(req);
3577 mutex_unlock(&osd->lock);
3578 up_read(&osdc->lock);
3579
3580 __complete_request(req);
3581 return;
3582
3583 fail_request:
3584 complete_request(req, -EIO);
3585 out_unlock_session:
3586 mutex_unlock(&osd->lock);
3587 out_unlock_osdc:
3588 up_read(&osdc->lock);
3589 }
3590
3591 static void set_pool_was_full(struct ceph_osd_client *osdc)
3592 {
3593 struct rb_node *n;
3594
3595 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3596 struct ceph_pg_pool_info *pi =
3597 rb_entry(n, struct ceph_pg_pool_info, node);
3598
3599 pi->was_full = __pool_full(pi);
3600 }
3601 }
3602
3603 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
3604 {
3605 struct ceph_pg_pool_info *pi;
3606
3607 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3608 if (!pi)
3609 return false;
3610
3611 return pi->was_full && !__pool_full(pi);
3612 }
3613
3614 static enum calc_target_result
3615 recalc_linger_target(struct ceph_osd_linger_request *lreq)
3616 {
3617 struct ceph_osd_client *osdc = lreq->osdc;
3618 enum calc_target_result ct_res;
3619
3620 ct_res = calc_target(osdc, &lreq->t, NULL, true);
3621 if (ct_res == CALC_TARGET_NEED_RESEND) {
3622 struct ceph_osd *osd;
3623
3624 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3625 if (osd != lreq->osd) {
3626 unlink_linger(lreq->osd, lreq);
3627 link_linger(osd, lreq);
3628 }
3629 }
3630
3631 return ct_res;
3632 }
3633
3634 /*
3635 * Requeue requests whose mapping to an OSD has changed.
3636 */
3637 static void scan_requests(struct ceph_osd *osd,
3638 bool force_resend,
3639 bool cleared_full,
3640 bool check_pool_cleared_full,
3641 struct rb_root *need_resend,
3642 struct list_head *need_resend_linger)
3643 {
3644 struct ceph_osd_client *osdc = osd->o_osdc;
3645 struct rb_node *n;
3646 bool force_resend_writes;
3647
3648 for (n = rb_first(&osd->o_linger_requests); n; ) {
3649 struct ceph_osd_linger_request *lreq =
3650 rb_entry(n, struct ceph_osd_linger_request, node);
3651 enum calc_target_result ct_res;
3652
3653 n = rb_next(n); /* recalc_linger_target() */
3654
3655 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3656 lreq->linger_id);
3657 ct_res = recalc_linger_target(lreq);
3658 switch (ct_res) {
3659 case CALC_TARGET_NO_ACTION:
3660 force_resend_writes = cleared_full ||
3661 (check_pool_cleared_full &&
3662 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3663 if (!force_resend && !force_resend_writes)
3664 break;
3665
3666 /* fall through */
3667 case CALC_TARGET_NEED_RESEND:
3668 cancel_linger_map_check(lreq);
3669 /*
3670 * scan_requests() for the previous epoch(s)
3671 * may have already added it to the list, since
3672 * it's not unlinked here.
3673 */
3674 if (list_empty(&lreq->scan_item))
3675 list_add_tail(&lreq->scan_item, need_resend_linger);
3676 break;
3677 case CALC_TARGET_POOL_DNE:
3678 list_del_init(&lreq->scan_item);
3679 check_linger_pool_dne(lreq);
3680 break;
3681 }
3682 }
3683
3684 for (n = rb_first(&osd->o_requests); n; ) {
3685 struct ceph_osd_request *req =
3686 rb_entry(n, struct ceph_osd_request, r_node);
3687 enum calc_target_result ct_res;
3688
3689 n = rb_next(n); /* unlink_request(), check_pool_dne() */
3690
3691 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3692 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
3693 false);
3694 switch (ct_res) {
3695 case CALC_TARGET_NO_ACTION:
3696 force_resend_writes = cleared_full ||
3697 (check_pool_cleared_full &&
3698 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3699 if (!force_resend &&
3700 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3701 !force_resend_writes))
3702 break;
3703
3704 /* fall through */
3705 case CALC_TARGET_NEED_RESEND:
3706 cancel_map_check(req);
3707 unlink_request(osd, req);
3708 insert_request(need_resend, req);
3709 break;
3710 case CALC_TARGET_POOL_DNE:
3711 check_pool_dne(req);
3712 break;
3713 }
3714 }
3715 }
3716
3717 static int handle_one_map(struct ceph_osd_client *osdc,
3718 void *p, void *end, bool incremental,
3719 struct rb_root *need_resend,
3720 struct list_head *need_resend_linger)
3721 {
3722 struct ceph_osdmap *newmap;
3723 struct rb_node *n;
3724 bool skipped_map = false;
3725 bool was_full;
3726
3727 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3728 set_pool_was_full(osdc);
3729
3730 if (incremental)
3731 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3732 else
3733 newmap = ceph_osdmap_decode(&p, end);
3734 if (IS_ERR(newmap))
3735 return PTR_ERR(newmap);
3736
3737 if (newmap != osdc->osdmap) {
3738 /*
3739 * Preserve ->was_full before destroying the old map.
3740 * For pools that weren't in the old map, ->was_full
3741 * should be false.
3742 */
3743 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3744 struct ceph_pg_pool_info *pi =
3745 rb_entry(n, struct ceph_pg_pool_info, node);
3746 struct ceph_pg_pool_info *old_pi;
3747
3748 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3749 if (old_pi)
3750 pi->was_full = old_pi->was_full;
3751 else
3752 WARN_ON(pi->was_full);
3753 }
3754
3755 if (osdc->osdmap->epoch &&
3756 osdc->osdmap->epoch + 1 < newmap->epoch) {
3757 WARN_ON(incremental);
3758 skipped_map = true;
3759 }
3760
3761 ceph_osdmap_destroy(osdc->osdmap);
3762 osdc->osdmap = newmap;
3763 }
3764
3765 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3766 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3767 need_resend, need_resend_linger);
3768
3769 for (n = rb_first(&osdc->osds); n; ) {
3770 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3771
3772 n = rb_next(n); /* close_osd() */
3773
3774 scan_requests(osd, skipped_map, was_full, true, need_resend,
3775 need_resend_linger);
3776 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3777 memcmp(&osd->o_con.peer_addr,
3778 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3779 sizeof(struct ceph_entity_addr)))
3780 close_osd(osd);
3781 }
3782
3783 return 0;
3784 }
3785
3786 static void kick_requests(struct ceph_osd_client *osdc,
3787 struct rb_root *need_resend,
3788 struct list_head *need_resend_linger)
3789 {
3790 struct ceph_osd_linger_request *lreq, *nlreq;
3791 enum calc_target_result ct_res;
3792 struct rb_node *n;
3793
3794 /* make sure need_resend targets reflect latest map */
3795 for (n = rb_first(need_resend); n; ) {
3796 struct ceph_osd_request *req =
3797 rb_entry(n, struct ceph_osd_request, r_node);
3798
3799 n = rb_next(n);
3800
3801 if (req->r_t.epoch < osdc->osdmap->epoch) {
3802 ct_res = calc_target(osdc, &req->r_t, NULL, false);
3803 if (ct_res == CALC_TARGET_POOL_DNE) {
3804 erase_request(need_resend, req);
3805 check_pool_dne(req);
3806 }
3807 }
3808 }
3809
3810 for (n = rb_first(need_resend); n; ) {
3811 struct ceph_osd_request *req =
3812 rb_entry(n, struct ceph_osd_request, r_node);
3813 struct ceph_osd *osd;
3814
3815 n = rb_next(n);
3816 erase_request(need_resend, req); /* before link_request() */
3817
3818 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3819 link_request(osd, req);
3820 if (!req->r_linger) {
3821 if (!osd_homeless(osd) && !req->r_t.paused)
3822 send_request(req);
3823 } else {
3824 cancel_linger_request(req);
3825 }
3826 }
3827
3828 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3829 if (!osd_homeless(lreq->osd))
3830 send_linger(lreq);
3831
3832 list_del_init(&lreq->scan_item);
3833 }
3834 }
3835
3836 /*
3837 * Process updated osd map.
3838 *
3839 * The message contains any number of incremental and full maps, normally
3840 * indicating some sort of topology change in the cluster. Kick requests
3841 * off to different OSDs as needed.
3842 */
3843 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3844 {
3845 void *p = msg->front.iov_base;
3846 void *const end = p + msg->front.iov_len;
3847 u32 nr_maps, maplen;
3848 u32 epoch;
3849 struct ceph_fsid fsid;
3850 struct rb_root need_resend = RB_ROOT;
3851 LIST_HEAD(need_resend_linger);
3852 bool handled_incremental = false;
3853 bool was_pauserd, was_pausewr;
3854 bool pauserd, pausewr;
3855 int err;
3856
3857 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
3858 down_write(&osdc->lock);
3859
3860 /* verify fsid */
3861 ceph_decode_need(&p, end, sizeof(fsid), bad);
3862 ceph_decode_copy(&p, &fsid, sizeof(fsid));
3863 if (ceph_check_fsid(osdc->client, &fsid) < 0)
3864 goto bad;
3865
3866 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3867 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3868 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
3869 have_pool_full(osdc);
3870
3871 /* incremental maps */
3872 ceph_decode_32_safe(&p, end, nr_maps, bad);
3873 dout(" %d inc maps\n", nr_maps);
3874 while (nr_maps > 0) {
3875 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3876 epoch = ceph_decode_32(&p);
3877 maplen = ceph_decode_32(&p);
3878 ceph_decode_need(&p, end, maplen, bad);
3879 if (osdc->osdmap->epoch &&
3880 osdc->osdmap->epoch + 1 == epoch) {
3881 dout("applying incremental map %u len %d\n",
3882 epoch, maplen);
3883 err = handle_one_map(osdc, p, p + maplen, true,
3884 &need_resend, &need_resend_linger);
3885 if (err)
3886 goto bad;
3887 handled_incremental = true;
3888 } else {
3889 dout("ignoring incremental map %u len %d\n",
3890 epoch, maplen);
3891 }
3892 p += maplen;
3893 nr_maps--;
3894 }
3895 if (handled_incremental)
3896 goto done;
3897
3898 /* full maps */
3899 ceph_decode_32_safe(&p, end, nr_maps, bad);
3900 dout(" %d full maps\n", nr_maps);
3901 while (nr_maps) {
3902 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3903 epoch = ceph_decode_32(&p);
3904 maplen = ceph_decode_32(&p);
3905 ceph_decode_need(&p, end, maplen, bad);
3906 if (nr_maps > 1) {
3907 dout("skipping non-latest full map %u len %d\n",
3908 epoch, maplen);
3909 } else if (osdc->osdmap->epoch >= epoch) {
3910 dout("skipping full map %u len %d, "
3911 "older than our %u\n", epoch, maplen,
3912 osdc->osdmap->epoch);
3913 } else {
3914 dout("taking full map %u len %d\n", epoch, maplen);
3915 err = handle_one_map(osdc, p, p + maplen, false,
3916 &need_resend, &need_resend_linger);
3917 if (err)
3918 goto bad;
3919 }
3920 p += maplen;
3921 nr_maps--;
3922 }
3923
3924 done:
3925 /*
3926 * subscribe to subsequent osdmap updates if full to ensure
3927 * we find out when we are no longer full and stop returning
3928 * ENOSPC.
3929 */
3930 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3931 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3932 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
3933 have_pool_full(osdc);
3934 if (was_pauserd || was_pausewr || pauserd || pausewr ||
3935 osdc->osdmap->epoch < osdc->epoch_barrier)
3936 maybe_request_map(osdc);
3937
3938 kick_requests(osdc, &need_resend, &need_resend_linger);
3939
3940 ceph_osdc_abort_on_full(osdc);
3941 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
3942 osdc->osdmap->epoch);
3943 up_write(&osdc->lock);
3944 wake_up_all(&osdc->client->auth_wq);
3945 return;
3946
3947 bad:
3948 pr_err("osdc handle_map corrupt msg\n");
3949 ceph_msg_dump(msg);
3950 up_write(&osdc->lock);
3951 }
3952
3953 /*
3954 * Resubmit requests pending on the given osd.
3955 */
3956 static void kick_osd_requests(struct ceph_osd *osd)
3957 {
3958 struct rb_node *n;
3959
3960 clear_backoffs(osd);
3961
3962 for (n = rb_first(&osd->o_requests); n; ) {
3963 struct ceph_osd_request *req =
3964 rb_entry(n, struct ceph_osd_request, r_node);
3965
3966 n = rb_next(n); /* cancel_linger_request() */
3967
3968 if (!req->r_linger) {
3969 if (!req->r_t.paused)
3970 send_request(req);
3971 } else {
3972 cancel_linger_request(req);
3973 }
3974 }
3975 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
3976 struct ceph_osd_linger_request *lreq =
3977 rb_entry(n, struct ceph_osd_linger_request, node);
3978
3979 send_linger(lreq);
3980 }
3981 }
3982
3983 /*
3984 * If the osd connection drops, we need to resubmit all requests.
3985 */
3986 static void osd_fault(struct ceph_connection *con)
3987 {
3988 struct ceph_osd *osd = con->private;
3989 struct ceph_osd_client *osdc = osd->o_osdc;
3990
3991 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
3992
3993 down_write(&osdc->lock);
3994 if (!osd_registered(osd)) {
3995 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3996 goto out_unlock;
3997 }
3998
3999 if (!reopen_osd(osd))
4000 kick_osd_requests(osd);
4001 maybe_request_map(osdc);
4002
4003 out_unlock:
4004 up_write(&osdc->lock);
4005 }
4006
4007 struct MOSDBackoff {
4008 struct ceph_spg spgid;
4009 u32 map_epoch;
4010 u8 op;
4011 u64 id;
4012 struct ceph_hobject_id *begin;
4013 struct ceph_hobject_id *end;
4014 };
4015
4016 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4017 {
4018 void *p = msg->front.iov_base;
4019 void *const end = p + msg->front.iov_len;
4020 u8 struct_v;
4021 u32 struct_len;
4022 int ret;
4023
4024 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4025 if (ret)
4026 return ret;
4027
4028 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4029 if (ret)
4030 return ret;
4031
4032 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4033 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4034 ceph_decode_8_safe(&p, end, m->op, e_inval);
4035 ceph_decode_64_safe(&p, end, m->id, e_inval);
4036
4037 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4038 if (!m->begin)
4039 return -ENOMEM;
4040
4041 ret = decode_hoid(&p, end, m->begin);
4042 if (ret) {
4043 free_hoid(m->begin);
4044 return ret;
4045 }
4046
4047 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4048 if (!m->end) {
4049 free_hoid(m->begin);
4050 return -ENOMEM;
4051 }
4052
4053 ret = decode_hoid(&p, end, m->end);
4054 if (ret) {
4055 free_hoid(m->begin);
4056 free_hoid(m->end);
4057 return ret;
4058 }
4059
4060 return 0;
4061
4062 e_inval:
4063 return -EINVAL;
4064 }
4065
4066 static struct ceph_msg *create_backoff_message(
4067 const struct ceph_osd_backoff *backoff,
4068 u32 map_epoch)
4069 {
4070 struct ceph_msg *msg;
4071 void *p, *end;
4072 int msg_size;
4073
4074 msg_size = CEPH_ENCODING_START_BLK_LEN +
4075 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4076 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4077 msg_size += CEPH_ENCODING_START_BLK_LEN +
4078 hoid_encoding_size(backoff->begin);
4079 msg_size += CEPH_ENCODING_START_BLK_LEN +
4080 hoid_encoding_size(backoff->end);
4081
4082 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4083 if (!msg)
4084 return NULL;
4085
4086 p = msg->front.iov_base;
4087 end = p + msg->front_alloc_len;
4088
4089 encode_spgid(&p, &backoff->spgid);
4090 ceph_encode_32(&p, map_epoch);
4091 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4092 ceph_encode_64(&p, backoff->id);
4093 encode_hoid(&p, end, backoff->begin);
4094 encode_hoid(&p, end, backoff->end);
4095 BUG_ON(p != end);
4096
4097 msg->front.iov_len = p - msg->front.iov_base;
4098 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4099 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4100
4101 return msg;
4102 }
4103
4104 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4105 {
4106 struct ceph_spg_mapping *spg;
4107 struct ceph_osd_backoff *backoff;
4108 struct ceph_msg *msg;
4109
4110 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4111 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4112
4113 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4114 if (!spg) {
4115 spg = alloc_spg_mapping();
4116 if (!spg) {
4117 pr_err("%s failed to allocate spg\n", __func__);
4118 return;
4119 }
4120 spg->spgid = m->spgid; /* struct */
4121 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4122 }
4123
4124 backoff = alloc_backoff();
4125 if (!backoff) {
4126 pr_err("%s failed to allocate backoff\n", __func__);
4127 return;
4128 }
4129 backoff->spgid = m->spgid; /* struct */
4130 backoff->id = m->id;
4131 backoff->begin = m->begin;
4132 m->begin = NULL; /* backoff now owns this */
4133 backoff->end = m->end;
4134 m->end = NULL; /* ditto */
4135
4136 insert_backoff(&spg->backoffs, backoff);
4137 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4138
4139 /*
4140 * Ack with original backoff's epoch so that the OSD can
4141 * discard this if there was a PG split.
4142 */
4143 msg = create_backoff_message(backoff, m->map_epoch);
4144 if (!msg) {
4145 pr_err("%s failed to allocate msg\n", __func__);
4146 return;
4147 }
4148 ceph_con_send(&osd->o_con, msg);
4149 }
4150
4151 static bool target_contained_by(const struct ceph_osd_request_target *t,
4152 const struct ceph_hobject_id *begin,
4153 const struct ceph_hobject_id *end)
4154 {
4155 struct ceph_hobject_id hoid;
4156 int cmp;
4157
4158 hoid_fill_from_target(&hoid, t);
4159 cmp = hoid_compare(&hoid, begin);
4160 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4161 }
4162
4163 static void handle_backoff_unblock(struct ceph_osd *osd,
4164 const struct MOSDBackoff *m)
4165 {
4166 struct ceph_spg_mapping *spg;
4167 struct ceph_osd_backoff *backoff;
4168 struct rb_node *n;
4169
4170 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4171 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4172
4173 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4174 if (!backoff) {
4175 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4176 __func__, osd->o_osd, m->spgid.pgid.pool,
4177 m->spgid.pgid.seed, m->spgid.shard, m->id);
4178 return;
4179 }
4180
4181 if (hoid_compare(backoff->begin, m->begin) &&
4182 hoid_compare(backoff->end, m->end)) {
4183 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4184 __func__, osd->o_osd, m->spgid.pgid.pool,
4185 m->spgid.pgid.seed, m->spgid.shard, m->id);
4186 /* unblock it anyway... */
4187 }
4188
4189 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4190 BUG_ON(!spg);
4191
4192 erase_backoff(&spg->backoffs, backoff);
4193 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4194 free_backoff(backoff);
4195
4196 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4197 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4198 free_spg_mapping(spg);
4199 }
4200
4201 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4202 struct ceph_osd_request *req =
4203 rb_entry(n, struct ceph_osd_request, r_node);
4204
4205 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4206 /*
4207 * Match against @m, not @backoff -- the PG may
4208 * have split on the OSD.
4209 */
4210 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4211 /*
4212 * If no other installed backoff applies,
4213 * resend.
4214 */
4215 send_request(req);
4216 }
4217 }
4218 }
4219 }
4220
4221 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4222 {
4223 struct ceph_osd_client *osdc = osd->o_osdc;
4224 struct MOSDBackoff m;
4225 int ret;
4226
4227 down_read(&osdc->lock);
4228 if (!osd_registered(osd)) {
4229 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4230 up_read(&osdc->lock);
4231 return;
4232 }
4233 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4234
4235 mutex_lock(&osd->lock);
4236 ret = decode_MOSDBackoff(msg, &m);
4237 if (ret) {
4238 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4239 ceph_msg_dump(msg);
4240 goto out_unlock;
4241 }
4242
4243 switch (m.op) {
4244 case CEPH_OSD_BACKOFF_OP_BLOCK:
4245 handle_backoff_block(osd, &m);
4246 break;
4247 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4248 handle_backoff_unblock(osd, &m);
4249 break;
4250 default:
4251 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4252 }
4253
4254 free_hoid(m.begin);
4255 free_hoid(m.end);
4256
4257 out_unlock:
4258 mutex_unlock(&osd->lock);
4259 up_read(&osdc->lock);
4260 }
4261
4262 /*
4263 * Process osd watch notifications
4264 */
4265 static void handle_watch_notify(struct ceph_osd_client *osdc,
4266 struct ceph_msg *msg)
4267 {
4268 void *p = msg->front.iov_base;
4269 void *const end = p + msg->front.iov_len;
4270 struct ceph_osd_linger_request *lreq;
4271 struct linger_work *lwork;
4272 u8 proto_ver, opcode;
4273 u64 cookie, notify_id;
4274 u64 notifier_id = 0;
4275 s32 return_code = 0;
4276 void *payload = NULL;
4277 u32 payload_len = 0;
4278
4279 ceph_decode_8_safe(&p, end, proto_ver, bad);
4280 ceph_decode_8_safe(&p, end, opcode, bad);
4281 ceph_decode_64_safe(&p, end, cookie, bad);
4282 p += 8; /* skip ver */
4283 ceph_decode_64_safe(&p, end, notify_id, bad);
4284
4285 if (proto_ver >= 1) {
4286 ceph_decode_32_safe(&p, end, payload_len, bad);
4287 ceph_decode_need(&p, end, payload_len, bad);
4288 payload = p;
4289 p += payload_len;
4290 }
4291
4292 if (le16_to_cpu(msg->hdr.version) >= 2)
4293 ceph_decode_32_safe(&p, end, return_code, bad);
4294
4295 if (le16_to_cpu(msg->hdr.version) >= 3)
4296 ceph_decode_64_safe(&p, end, notifier_id, bad);
4297
4298 down_read(&osdc->lock);
4299 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4300 if (!lreq) {
4301 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4302 cookie);
4303 goto out_unlock_osdc;
4304 }
4305
4306 mutex_lock(&lreq->lock);
4307 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4308 opcode, cookie, lreq, lreq->is_watch);
4309 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4310 if (!lreq->last_error) {
4311 lreq->last_error = -ENOTCONN;
4312 queue_watch_error(lreq);
4313 }
4314 } else if (!lreq->is_watch) {
4315 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4316 if (lreq->notify_id && lreq->notify_id != notify_id) {
4317 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4318 lreq->notify_id, notify_id);
4319 } else if (!completion_done(&lreq->notify_finish_wait)) {
4320 struct ceph_msg_data *data =
4321 list_first_entry_or_null(&msg->data,
4322 struct ceph_msg_data,
4323 links);
4324
4325 if (data) {
4326 if (lreq->preply_pages) {
4327 WARN_ON(data->type !=
4328 CEPH_MSG_DATA_PAGES);
4329 *lreq->preply_pages = data->pages;
4330 *lreq->preply_len = data->length;
4331 } else {
4332 ceph_release_page_vector(data->pages,
4333 calc_pages_for(0, data->length));
4334 }
4335 }
4336 lreq->notify_finish_error = return_code;
4337 complete_all(&lreq->notify_finish_wait);
4338 }
4339 } else {
4340 /* CEPH_WATCH_EVENT_NOTIFY */
4341 lwork = lwork_alloc(lreq, do_watch_notify);
4342 if (!lwork) {
4343 pr_err("failed to allocate notify-lwork\n");
4344 goto out_unlock_lreq;
4345 }
4346
4347 lwork->notify.notify_id = notify_id;
4348 lwork->notify.notifier_id = notifier_id;
4349 lwork->notify.payload = payload;
4350 lwork->notify.payload_len = payload_len;
4351 lwork->notify.msg = ceph_msg_get(msg);
4352 lwork_queue(lwork);
4353 }
4354
4355 out_unlock_lreq:
4356 mutex_unlock(&lreq->lock);
4357 out_unlock_osdc:
4358 up_read(&osdc->lock);
4359 return;
4360
4361 bad:
4362 pr_err("osdc handle_watch_notify corrupt msg\n");
4363 }
4364
4365 /*
4366 * Register request, send initial attempt.
4367 */
4368 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4369 struct ceph_osd_request *req,
4370 bool nofail)
4371 {
4372 down_read(&osdc->lock);
4373 submit_request(req, false);
4374 up_read(&osdc->lock);
4375
4376 return 0;
4377 }
4378 EXPORT_SYMBOL(ceph_osdc_start_request);
4379
4380 /*
4381 * Unregister a registered request. The request is not completed:
4382 * ->r_result isn't set and __complete_request() isn't called.
4383 */
4384 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4385 {
4386 struct ceph_osd_client *osdc = req->r_osdc;
4387
4388 down_write(&osdc->lock);
4389 if (req->r_osd)
4390 cancel_request(req);
4391 up_write(&osdc->lock);
4392 }
4393 EXPORT_SYMBOL(ceph_osdc_cancel_request);
4394
4395 /*
4396 * @timeout: in jiffies, 0 means "wait forever"
4397 */
4398 static int wait_request_timeout(struct ceph_osd_request *req,
4399 unsigned long timeout)
4400 {
4401 long left;
4402
4403 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4404 left = wait_for_completion_killable_timeout(&req->r_completion,
4405 ceph_timeout_jiffies(timeout));
4406 if (left <= 0) {
4407 left = left ?: -ETIMEDOUT;
4408 ceph_osdc_cancel_request(req);
4409 } else {
4410 left = req->r_result; /* completed */
4411 }
4412
4413 return left;
4414 }
4415
4416 /*
4417 * wait for a request to complete
4418 */
4419 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4420 struct ceph_osd_request *req)
4421 {
4422 return wait_request_timeout(req, 0);
4423 }
4424 EXPORT_SYMBOL(ceph_osdc_wait_request);
4425
4426 /*
4427 * sync - wait for all in-flight requests to flush. avoid starvation.
4428 */
4429 void ceph_osdc_sync(struct ceph_osd_client *osdc)
4430 {
4431 struct rb_node *n, *p;
4432 u64 last_tid = atomic64_read(&osdc->last_tid);
4433
4434 again:
4435 down_read(&osdc->lock);
4436 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4437 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4438
4439 mutex_lock(&osd->lock);
4440 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4441 struct ceph_osd_request *req =
4442 rb_entry(p, struct ceph_osd_request, r_node);
4443
4444 if (req->r_tid > last_tid)
4445 break;
4446
4447 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4448 continue;
4449
4450 ceph_osdc_get_request(req);
4451 mutex_unlock(&osd->lock);
4452 up_read(&osdc->lock);
4453 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4454 __func__, req, req->r_tid, last_tid);
4455 wait_for_completion(&req->r_completion);
4456 ceph_osdc_put_request(req);
4457 goto again;
4458 }
4459
4460 mutex_unlock(&osd->lock);
4461 }
4462
4463 up_read(&osdc->lock);
4464 dout("%s done last_tid %llu\n", __func__, last_tid);
4465 }
4466 EXPORT_SYMBOL(ceph_osdc_sync);
4467
4468 static struct ceph_osd_request *
4469 alloc_linger_request(struct ceph_osd_linger_request *lreq)
4470 {
4471 struct ceph_osd_request *req;
4472
4473 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4474 if (!req)
4475 return NULL;
4476
4477 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4478 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4479
4480 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4481 ceph_osdc_put_request(req);
4482 return NULL;
4483 }
4484
4485 return req;
4486 }
4487
4488 /*
4489 * Returns a handle, caller owns a ref.
4490 */
4491 struct ceph_osd_linger_request *
4492 ceph_osdc_watch(struct ceph_osd_client *osdc,
4493 struct ceph_object_id *oid,
4494 struct ceph_object_locator *oloc,
4495 rados_watchcb2_t wcb,
4496 rados_watcherrcb_t errcb,
4497 void *data)
4498 {
4499 struct ceph_osd_linger_request *lreq;
4500 int ret;
4501
4502 lreq = linger_alloc(osdc);
4503 if (!lreq)
4504 return ERR_PTR(-ENOMEM);
4505
4506 lreq->is_watch = true;
4507 lreq->wcb = wcb;
4508 lreq->errcb = errcb;
4509 lreq->data = data;
4510 lreq->watch_valid_thru = jiffies;
4511
4512 ceph_oid_copy(&lreq->t.base_oid, oid);
4513 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4514 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4515 ktime_get_real_ts64(&lreq->mtime);
4516
4517 lreq->reg_req = alloc_linger_request(lreq);
4518 if (!lreq->reg_req) {
4519 ret = -ENOMEM;
4520 goto err_put_lreq;
4521 }
4522
4523 lreq->ping_req = alloc_linger_request(lreq);
4524 if (!lreq->ping_req) {
4525 ret = -ENOMEM;
4526 goto err_put_lreq;
4527 }
4528
4529 down_write(&osdc->lock);
4530 linger_register(lreq); /* before osd_req_op_* */
4531 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
4532 CEPH_OSD_WATCH_OP_WATCH);
4533 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
4534 CEPH_OSD_WATCH_OP_PING);
4535 linger_submit(lreq);
4536 up_write(&osdc->lock);
4537
4538 ret = linger_reg_commit_wait(lreq);
4539 if (ret) {
4540 linger_cancel(lreq);
4541 goto err_put_lreq;
4542 }
4543
4544 return lreq;
4545
4546 err_put_lreq:
4547 linger_put(lreq);
4548 return ERR_PTR(ret);
4549 }
4550 EXPORT_SYMBOL(ceph_osdc_watch);
4551
4552 /*
4553 * Releases a ref.
4554 *
4555 * Times out after mount_timeout to preserve rbd unmap behaviour
4556 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4557 * with mount_timeout").
4558 */
4559 int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4560 struct ceph_osd_linger_request *lreq)
4561 {
4562 struct ceph_options *opts = osdc->client->options;
4563 struct ceph_osd_request *req;
4564 int ret;
4565
4566 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4567 if (!req)
4568 return -ENOMEM;
4569
4570 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4571 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4572 req->r_flags = CEPH_OSD_FLAG_WRITE;
4573 ktime_get_real_ts64(&req->r_mtime);
4574 osd_req_op_watch_init(req, 0, lreq->linger_id,
4575 CEPH_OSD_WATCH_OP_UNWATCH);
4576
4577 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4578 if (ret)
4579 goto out_put_req;
4580
4581 ceph_osdc_start_request(osdc, req, false);
4582 linger_cancel(lreq);
4583 linger_put(lreq);
4584 ret = wait_request_timeout(req, opts->mount_timeout);
4585
4586 out_put_req:
4587 ceph_osdc_put_request(req);
4588 return ret;
4589 }
4590 EXPORT_SYMBOL(ceph_osdc_unwatch);
4591
4592 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4593 u64 notify_id, u64 cookie, void *payload,
4594 u32 payload_len)
4595 {
4596 struct ceph_osd_req_op *op;
4597 struct ceph_pagelist *pl;
4598 int ret;
4599
4600 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4601
4602 pl = kmalloc(sizeof(*pl), GFP_NOIO);
4603 if (!pl)
4604 return -ENOMEM;
4605
4606 ceph_pagelist_init(pl);
4607 ret = ceph_pagelist_encode_64(pl, notify_id);
4608 ret |= ceph_pagelist_encode_64(pl, cookie);
4609 if (payload) {
4610 ret |= ceph_pagelist_encode_32(pl, payload_len);
4611 ret |= ceph_pagelist_append(pl, payload, payload_len);
4612 } else {
4613 ret |= ceph_pagelist_encode_32(pl, 0);
4614 }
4615 if (ret) {
4616 ceph_pagelist_release(pl);
4617 return -ENOMEM;
4618 }
4619
4620 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4621 op->indata_len = pl->length;
4622 return 0;
4623 }
4624
4625 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4626 struct ceph_object_id *oid,
4627 struct ceph_object_locator *oloc,
4628 u64 notify_id,
4629 u64 cookie,
4630 void *payload,
4631 u32 payload_len)
4632 {
4633 struct ceph_osd_request *req;
4634 int ret;
4635
4636 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4637 if (!req)
4638 return -ENOMEM;
4639
4640 ceph_oid_copy(&req->r_base_oid, oid);
4641 ceph_oloc_copy(&req->r_base_oloc, oloc);
4642 req->r_flags = CEPH_OSD_FLAG_READ;
4643
4644 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4645 if (ret)
4646 goto out_put_req;
4647
4648 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4649 payload_len);
4650 if (ret)
4651 goto out_put_req;
4652
4653 ceph_osdc_start_request(osdc, req, false);
4654 ret = ceph_osdc_wait_request(osdc, req);
4655
4656 out_put_req:
4657 ceph_osdc_put_request(req);
4658 return ret;
4659 }
4660 EXPORT_SYMBOL(ceph_osdc_notify_ack);
4661
4662 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4663 u64 cookie, u32 prot_ver, u32 timeout,
4664 void *payload, u32 payload_len)
4665 {
4666 struct ceph_osd_req_op *op;
4667 struct ceph_pagelist *pl;
4668 int ret;
4669
4670 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4671 op->notify.cookie = cookie;
4672
4673 pl = kmalloc(sizeof(*pl), GFP_NOIO);
4674 if (!pl)
4675 return -ENOMEM;
4676
4677 ceph_pagelist_init(pl);
4678 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4679 ret |= ceph_pagelist_encode_32(pl, timeout);
4680 ret |= ceph_pagelist_encode_32(pl, payload_len);
4681 ret |= ceph_pagelist_append(pl, payload, payload_len);
4682 if (ret) {
4683 ceph_pagelist_release(pl);
4684 return -ENOMEM;
4685 }
4686
4687 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4688 op->indata_len = pl->length;
4689 return 0;
4690 }
4691
4692 /*
4693 * @timeout: in seconds
4694 *
4695 * @preply_{pages,len} are initialized both on success and error.
4696 * The caller is responsible for:
4697 *
4698 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4699 */
4700 int ceph_osdc_notify(struct ceph_osd_client *osdc,
4701 struct ceph_object_id *oid,
4702 struct ceph_object_locator *oloc,
4703 void *payload,
4704 u32 payload_len,
4705 u32 timeout,
4706 struct page ***preply_pages,
4707 size_t *preply_len)
4708 {
4709 struct ceph_osd_linger_request *lreq;
4710 struct page **pages;
4711 int ret;
4712
4713 WARN_ON(!timeout);
4714 if (preply_pages) {
4715 *preply_pages = NULL;
4716 *preply_len = 0;
4717 }
4718
4719 lreq = linger_alloc(osdc);
4720 if (!lreq)
4721 return -ENOMEM;
4722
4723 lreq->preply_pages = preply_pages;
4724 lreq->preply_len = preply_len;
4725
4726 ceph_oid_copy(&lreq->t.base_oid, oid);
4727 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4728 lreq->t.flags = CEPH_OSD_FLAG_READ;
4729
4730 lreq->reg_req = alloc_linger_request(lreq);
4731 if (!lreq->reg_req) {
4732 ret = -ENOMEM;
4733 goto out_put_lreq;
4734 }
4735
4736 /* for notify_id */
4737 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4738 if (IS_ERR(pages)) {
4739 ret = PTR_ERR(pages);
4740 goto out_put_lreq;
4741 }
4742
4743 down_write(&osdc->lock);
4744 linger_register(lreq); /* before osd_req_op_* */
4745 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
4746 timeout, payload, payload_len);
4747 if (ret) {
4748 linger_unregister(lreq);
4749 up_write(&osdc->lock);
4750 ceph_release_page_vector(pages, 1);
4751 goto out_put_lreq;
4752 }
4753 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4754 response_data),
4755 pages, PAGE_SIZE, 0, false, true);
4756 linger_submit(lreq);
4757 up_write(&osdc->lock);
4758
4759 ret = linger_reg_commit_wait(lreq);
4760 if (!ret)
4761 ret = linger_notify_finish_wait(lreq);
4762 else
4763 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4764
4765 linger_cancel(lreq);
4766 out_put_lreq:
4767 linger_put(lreq);
4768 return ret;
4769 }
4770 EXPORT_SYMBOL(ceph_osdc_notify);
4771
4772 /*
4773 * Return the number of milliseconds since the watch was last
4774 * confirmed, or an error. If there is an error, the watch is no
4775 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4776 */
4777 int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4778 struct ceph_osd_linger_request *lreq)
4779 {
4780 unsigned long stamp, age;
4781 int ret;
4782
4783 down_read(&osdc->lock);
4784 mutex_lock(&lreq->lock);
4785 stamp = lreq->watch_valid_thru;
4786 if (!list_empty(&lreq->pending_lworks)) {
4787 struct linger_work *lwork =
4788 list_first_entry(&lreq->pending_lworks,
4789 struct linger_work,
4790 pending_item);
4791
4792 if (time_before(lwork->queued_stamp, stamp))
4793 stamp = lwork->queued_stamp;
4794 }
4795 age = jiffies - stamp;
4796 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4797 lreq, lreq->linger_id, age, lreq->last_error);
4798 /* we are truncating to msecs, so return a safe upper bound */
4799 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4800
4801 mutex_unlock(&lreq->lock);
4802 up_read(&osdc->lock);
4803 return ret;
4804 }
4805
4806 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4807 {
4808 u8 struct_v;
4809 u32 struct_len;
4810 int ret;
4811
4812 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4813 &struct_v, &struct_len);
4814 if (ret)
4815 return ret;
4816
4817 ceph_decode_copy(p, &item->name, sizeof(item->name));
4818 item->cookie = ceph_decode_64(p);
4819 *p += 4; /* skip timeout_seconds */
4820 if (struct_v >= 2) {
4821 ceph_decode_copy(p, &item->addr, sizeof(item->addr));
4822 ceph_decode_addr(&item->addr);
4823 }
4824
4825 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4826 ENTITY_NAME(item->name), item->cookie,
4827 ceph_pr_addr(&item->addr.in_addr));
4828 return 0;
4829 }
4830
4831 static int decode_watchers(void **p, void *end,
4832 struct ceph_watch_item **watchers,
4833 u32 *num_watchers)
4834 {
4835 u8 struct_v;
4836 u32 struct_len;
4837 int i;
4838 int ret;
4839
4840 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4841 &struct_v, &struct_len);
4842 if (ret)
4843 return ret;
4844
4845 *num_watchers = ceph_decode_32(p);
4846 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4847 if (!*watchers)
4848 return -ENOMEM;
4849
4850 for (i = 0; i < *num_watchers; i++) {
4851 ret = decode_watcher(p, end, *watchers + i);
4852 if (ret) {
4853 kfree(*watchers);
4854 return ret;
4855 }
4856 }
4857
4858 return 0;
4859 }
4860
4861 /*
4862 * On success, the caller is responsible for:
4863 *
4864 * kfree(watchers);
4865 */
4866 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
4867 struct ceph_object_id *oid,
4868 struct ceph_object_locator *oloc,
4869 struct ceph_watch_item **watchers,
4870 u32 *num_watchers)
4871 {
4872 struct ceph_osd_request *req;
4873 struct page **pages;
4874 int ret;
4875
4876 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4877 if (!req)
4878 return -ENOMEM;
4879
4880 ceph_oid_copy(&req->r_base_oid, oid);
4881 ceph_oloc_copy(&req->r_base_oloc, oloc);
4882 req->r_flags = CEPH_OSD_FLAG_READ;
4883
4884 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4885 if (ret)
4886 goto out_put_req;
4887
4888 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4889 if (IS_ERR(pages)) {
4890 ret = PTR_ERR(pages);
4891 goto out_put_req;
4892 }
4893
4894 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
4895 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
4896 response_data),
4897 pages, PAGE_SIZE, 0, false, true);
4898
4899 ceph_osdc_start_request(osdc, req, false);
4900 ret = ceph_osdc_wait_request(osdc, req);
4901 if (ret >= 0) {
4902 void *p = page_address(pages[0]);
4903 void *const end = p + req->r_ops[0].outdata_len;
4904
4905 ret = decode_watchers(&p, end, watchers, num_watchers);
4906 }
4907
4908 out_put_req:
4909 ceph_osdc_put_request(req);
4910 return ret;
4911 }
4912 EXPORT_SYMBOL(ceph_osdc_list_watchers);
4913
4914 /*
4915 * Call all pending notify callbacks - for use after a watch is
4916 * unregistered, to make sure no more callbacks for it will be invoked
4917 */
4918 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
4919 {
4920 dout("%s osdc %p\n", __func__, osdc);
4921 flush_workqueue(osdc->notify_wq);
4922 }
4923 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
4924
4925 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
4926 {
4927 down_read(&osdc->lock);
4928 maybe_request_map(osdc);
4929 up_read(&osdc->lock);
4930 }
4931 EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
4932
4933 /*
4934 * Execute an OSD class method on an object.
4935 *
4936 * @flags: CEPH_OSD_FLAG_*
4937 * @resp_len: in/out param for reply length
4938 */
4939 int ceph_osdc_call(struct ceph_osd_client *osdc,
4940 struct ceph_object_id *oid,
4941 struct ceph_object_locator *oloc,
4942 const char *class, const char *method,
4943 unsigned int flags,
4944 struct page *req_page, size_t req_len,
4945 struct page *resp_page, size_t *resp_len)
4946 {
4947 struct ceph_osd_request *req;
4948 int ret;
4949
4950 if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE))
4951 return -E2BIG;
4952
4953 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4954 if (!req)
4955 return -ENOMEM;
4956
4957 ceph_oid_copy(&req->r_base_oid, oid);
4958 ceph_oloc_copy(&req->r_base_oloc, oloc);
4959 req->r_flags = flags;
4960
4961 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4962 if (ret)
4963 goto out_put_req;
4964
4965 ret = osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
4966 if (ret)
4967 goto out_put_req;
4968
4969 if (req_page)
4970 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
4971 0, false, false);
4972 if (resp_page)
4973 osd_req_op_cls_response_data_pages(req, 0, &resp_page,
4974 *resp_len, 0, false, false);
4975
4976 ceph_osdc_start_request(osdc, req, false);
4977 ret = ceph_osdc_wait_request(osdc, req);
4978 if (ret >= 0) {
4979 ret = req->r_ops[0].rval;
4980 if (resp_page)
4981 *resp_len = req->r_ops[0].outdata_len;
4982 }
4983
4984 out_put_req:
4985 ceph_osdc_put_request(req);
4986 return ret;
4987 }
4988 EXPORT_SYMBOL(ceph_osdc_call);
4989
4990 /*
4991 * init, shutdown
4992 */
4993 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
4994 {
4995 int err;
4996
4997 dout("init\n");
4998 osdc->client = client;
4999 init_rwsem(&osdc->lock);
5000 osdc->osds = RB_ROOT;
5001 INIT_LIST_HEAD(&osdc->osd_lru);
5002 spin_lock_init(&osdc->osd_lru_lock);
5003 osd_init(&osdc->homeless_osd);
5004 osdc->homeless_osd.o_osdc = osdc;
5005 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
5006 osdc->last_linger_id = CEPH_LINGER_ID_START;
5007 osdc->linger_requests = RB_ROOT;
5008 osdc->map_checks = RB_ROOT;
5009 osdc->linger_map_checks = RB_ROOT;
5010 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
5011 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5012
5013 err = -ENOMEM;
5014 osdc->osdmap = ceph_osdmap_alloc();
5015 if (!osdc->osdmap)
5016 goto out;
5017
5018 osdc->req_mempool = mempool_create_slab_pool(10,
5019 ceph_osd_request_cache);
5020 if (!osdc->req_mempool)
5021 goto out_map;
5022
5023 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
5024 PAGE_SIZE, 10, true, "osd_op");
5025 if (err < 0)
5026 goto out_mempool;
5027 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
5028 PAGE_SIZE, 10, true, "osd_op_reply");
5029 if (err < 0)
5030 goto out_msgpool;
5031
5032 err = -ENOMEM;
5033 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
5034 if (!osdc->notify_wq)
5035 goto out_msgpool_reply;
5036
5037 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5038 if (!osdc->completion_wq)
5039 goto out_notify_wq;
5040
5041 schedule_delayed_work(&osdc->timeout_work,
5042 osdc->client->options->osd_keepalive_timeout);
5043 schedule_delayed_work(&osdc->osds_timeout_work,
5044 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5045
5046 return 0;
5047
5048 out_notify_wq:
5049 destroy_workqueue(osdc->notify_wq);
5050 out_msgpool_reply:
5051 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5052 out_msgpool:
5053 ceph_msgpool_destroy(&osdc->msgpool_op);
5054 out_mempool:
5055 mempool_destroy(osdc->req_mempool);
5056 out_map:
5057 ceph_osdmap_destroy(osdc->osdmap);
5058 out:
5059 return err;
5060 }
5061
5062 void ceph_osdc_stop(struct ceph_osd_client *osdc)
5063 {
5064 destroy_workqueue(osdc->completion_wq);
5065 destroy_workqueue(osdc->notify_wq);
5066 cancel_delayed_work_sync(&osdc->timeout_work);
5067 cancel_delayed_work_sync(&osdc->osds_timeout_work);
5068
5069 down_write(&osdc->lock);
5070 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5071 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5072 struct ceph_osd, o_node);
5073 close_osd(osd);
5074 }
5075 up_write(&osdc->lock);
5076 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5077 osd_cleanup(&osdc->homeless_osd);
5078
5079 WARN_ON(!list_empty(&osdc->osd_lru));
5080 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
5081 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5082 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5083 WARN_ON(atomic_read(&osdc->num_requests));
5084 WARN_ON(atomic_read(&osdc->num_homeless));
5085
5086 ceph_osdmap_destroy(osdc->osdmap);
5087 mempool_destroy(osdc->req_mempool);
5088 ceph_msgpool_destroy(&osdc->msgpool_op);
5089 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5090 }
5091
5092 /*
5093 * Read some contiguous pages. If we cross a stripe boundary, shorten
5094 * *plen. Return number of bytes read, or error.
5095 */
5096 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
5097 struct ceph_vino vino, struct ceph_file_layout *layout,
5098 u64 off, u64 *plen,
5099 u32 truncate_seq, u64 truncate_size,
5100 struct page **pages, int num_pages, int page_align)
5101 {
5102 struct ceph_osd_request *req;
5103 int rc = 0;
5104
5105 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
5106 vino.snap, off, *plen);
5107 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
5108 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
5109 NULL, truncate_seq, truncate_size,
5110 false);
5111 if (IS_ERR(req))
5112 return PTR_ERR(req);
5113
5114 /* it may be a short read due to an object boundary */
5115 osd_req_op_extent_osd_data_pages(req, 0,
5116 pages, *plen, page_align, false, false);
5117
5118 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
5119 off, *plen, *plen, page_align);
5120
5121 rc = ceph_osdc_start_request(osdc, req, false);
5122 if (!rc)
5123 rc = ceph_osdc_wait_request(osdc, req);
5124
5125 ceph_osdc_put_request(req);
5126 dout("readpages result %d\n", rc);
5127 return rc;
5128 }
5129 EXPORT_SYMBOL(ceph_osdc_readpages);
5130
5131 /*
5132 * do a synchronous write on N pages
5133 */
5134 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
5135 struct ceph_file_layout *layout,
5136 struct ceph_snap_context *snapc,
5137 u64 off, u64 len,
5138 u32 truncate_seq, u64 truncate_size,
5139 struct timespec64 *mtime,
5140 struct page **pages, int num_pages)
5141 {
5142 struct ceph_osd_request *req;
5143 int rc = 0;
5144 int page_align = off & ~PAGE_MASK;
5145
5146 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
5147 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
5148 snapc, truncate_seq, truncate_size,
5149 true);
5150 if (IS_ERR(req))
5151 return PTR_ERR(req);
5152
5153 /* it may be a short write due to an object boundary */
5154 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
5155 false, false);
5156 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
5157
5158 req->r_mtime = *mtime;
5159 rc = ceph_osdc_start_request(osdc, req, true);
5160 if (!rc)
5161 rc = ceph_osdc_wait_request(osdc, req);
5162
5163 ceph_osdc_put_request(req);
5164 if (rc == 0)
5165 rc = len;
5166 dout("writepages result %d\n", rc);
5167 return rc;
5168 }
5169 EXPORT_SYMBOL(ceph_osdc_writepages);
5170
5171 int __init ceph_osdc_setup(void)
5172 {
5173 size_t size = sizeof(struct ceph_osd_request) +
5174 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5175
5176 BUG_ON(ceph_osd_request_cache);
5177 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5178 0, 0, NULL);
5179
5180 return ceph_osd_request_cache ? 0 : -ENOMEM;
5181 }
5182
5183 void ceph_osdc_cleanup(void)
5184 {
5185 BUG_ON(!ceph_osd_request_cache);
5186 kmem_cache_destroy(ceph_osd_request_cache);
5187 ceph_osd_request_cache = NULL;
5188 }
5189
5190 /*
5191 * handle incoming message
5192 */
5193 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5194 {
5195 struct ceph_osd *osd = con->private;
5196 struct ceph_osd_client *osdc = osd->o_osdc;
5197 int type = le16_to_cpu(msg->hdr.type);
5198
5199 switch (type) {
5200 case CEPH_MSG_OSD_MAP:
5201 ceph_osdc_handle_map(osdc, msg);
5202 break;
5203 case CEPH_MSG_OSD_OPREPLY:
5204 handle_reply(osd, msg);
5205 break;
5206 case CEPH_MSG_OSD_BACKOFF:
5207 handle_backoff(osd, msg);
5208 break;
5209 case CEPH_MSG_WATCH_NOTIFY:
5210 handle_watch_notify(osdc, msg);
5211 break;
5212
5213 default:
5214 pr_err("received unknown message type %d %s\n", type,
5215 ceph_msg_type_name(type));
5216 }
5217
5218 ceph_msg_put(msg);
5219 }
5220
5221 /*
5222 * Lookup and return message for incoming reply. Don't try to do
5223 * anything about a larger than preallocated data portion of the
5224 * message at the moment - for now, just skip the message.
5225 */
5226 static struct ceph_msg *get_reply(struct ceph_connection *con,
5227 struct ceph_msg_header *hdr,
5228 int *skip)
5229 {
5230 struct ceph_osd *osd = con->private;
5231 struct ceph_osd_client *osdc = osd->o_osdc;
5232 struct ceph_msg *m = NULL;
5233 struct ceph_osd_request *req;
5234 int front_len = le32_to_cpu(hdr->front_len);
5235 int data_len = le32_to_cpu(hdr->data_len);
5236 u64 tid = le64_to_cpu(hdr->tid);
5237
5238 down_read(&osdc->lock);
5239 if (!osd_registered(osd)) {
5240 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5241 *skip = 1;
5242 goto out_unlock_osdc;
5243 }
5244 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5245
5246 mutex_lock(&osd->lock);
5247 req = lookup_request(&osd->o_requests, tid);
5248 if (!req) {
5249 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5250 osd->o_osd, tid);
5251 *skip = 1;
5252 goto out_unlock_session;
5253 }
5254
5255 ceph_msg_revoke_incoming(req->r_reply);
5256
5257 if (front_len > req->r_reply->front_alloc_len) {
5258 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5259 __func__, osd->o_osd, req->r_tid, front_len,
5260 req->r_reply->front_alloc_len);
5261 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5262 false);
5263 if (!m)
5264 goto out_unlock_session;
5265 ceph_msg_put(req->r_reply);
5266 req->r_reply = m;
5267 }
5268
5269 if (data_len > req->r_reply->data_length) {
5270 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5271 __func__, osd->o_osd, req->r_tid, data_len,
5272 req->r_reply->data_length);
5273 m = NULL;
5274 *skip = 1;
5275 goto out_unlock_session;
5276 }
5277
5278 m = ceph_msg_get(req->r_reply);
5279 dout("get_reply tid %lld %p\n", tid, m);
5280
5281 out_unlock_session:
5282 mutex_unlock(&osd->lock);
5283 out_unlock_osdc:
5284 up_read(&osdc->lock);
5285 return m;
5286 }
5287
5288 /*
5289 * TODO: switch to a msg-owned pagelist
5290 */
5291 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5292 {
5293 struct ceph_msg *m;
5294 int type = le16_to_cpu(hdr->type);
5295 u32 front_len = le32_to_cpu(hdr->front_len);
5296 u32 data_len = le32_to_cpu(hdr->data_len);
5297
5298 m = ceph_msg_new(type, front_len, GFP_NOIO, false);
5299 if (!m)
5300 return NULL;
5301
5302 if (data_len) {
5303 struct page **pages;
5304 struct ceph_osd_data osd_data;
5305
5306 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5307 GFP_NOIO);
5308 if (IS_ERR(pages)) {
5309 ceph_msg_put(m);
5310 return NULL;
5311 }
5312
5313 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
5314 false);
5315 ceph_osdc_msg_data_add(m, &osd_data);
5316 }
5317
5318 return m;
5319 }
5320
5321 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5322 struct ceph_msg_header *hdr,
5323 int *skip)
5324 {
5325 struct ceph_osd *osd = con->private;
5326 int type = le16_to_cpu(hdr->type);
5327
5328 *skip = 0;
5329 switch (type) {
5330 case CEPH_MSG_OSD_MAP:
5331 case CEPH_MSG_OSD_BACKOFF:
5332 case CEPH_MSG_WATCH_NOTIFY:
5333 return alloc_msg_with_page_vector(hdr);
5334 case CEPH_MSG_OSD_OPREPLY:
5335 return get_reply(con, hdr, skip);
5336 default:
5337 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5338 osd->o_osd, type);
5339 *skip = 1;
5340 return NULL;
5341 }
5342 }
5343
5344 /*
5345 * Wrappers to refcount containing ceph_osd struct
5346 */
5347 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5348 {
5349 struct ceph_osd *osd = con->private;
5350 if (get_osd(osd))
5351 return con;
5352 return NULL;
5353 }
5354
5355 static void put_osd_con(struct ceph_connection *con)
5356 {
5357 struct ceph_osd *osd = con->private;
5358 put_osd(osd);
5359 }
5360
5361 /*
5362 * authentication
5363 */
5364 /*
5365 * Note: returned pointer is the address of a structure that's
5366 * managed separately. Caller must *not* attempt to free it.
5367 */
5368 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
5369 int *proto, int force_new)
5370 {
5371 struct ceph_osd *o = con->private;
5372 struct ceph_osd_client *osdc = o->o_osdc;
5373 struct ceph_auth_client *ac = osdc->client->monc.auth;
5374 struct ceph_auth_handshake *auth = &o->o_auth;
5375
5376 if (force_new && auth->authorizer) {
5377 ceph_auth_destroy_authorizer(auth->authorizer);
5378 auth->authorizer = NULL;
5379 }
5380 if (!auth->authorizer) {
5381 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5382 auth);
5383 if (ret)
5384 return ERR_PTR(ret);
5385 } else {
5386 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5387 auth);
5388 if (ret)
5389 return ERR_PTR(ret);
5390 }
5391 *proto = ac->protocol;
5392
5393 return auth;
5394 }
5395
5396 static int add_authorizer_challenge(struct ceph_connection *con,
5397 void *challenge_buf, int challenge_buf_len)
5398 {
5399 struct ceph_osd *o = con->private;
5400 struct ceph_osd_client *osdc = o->o_osdc;
5401 struct ceph_auth_client *ac = osdc->client->monc.auth;
5402
5403 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5404 challenge_buf, challenge_buf_len);
5405 }
5406
5407 static int verify_authorizer_reply(struct ceph_connection *con)
5408 {
5409 struct ceph_osd *o = con->private;
5410 struct ceph_osd_client *osdc = o->o_osdc;
5411 struct ceph_auth_client *ac = osdc->client->monc.auth;
5412
5413 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
5414 }
5415
5416 static int invalidate_authorizer(struct ceph_connection *con)
5417 {
5418 struct ceph_osd *o = con->private;
5419 struct ceph_osd_client *osdc = o->o_osdc;
5420 struct ceph_auth_client *ac = osdc->client->monc.auth;
5421
5422 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5423 return ceph_monc_validate_auth(&osdc->client->monc);
5424 }
5425
5426 static void osd_reencode_message(struct ceph_msg *msg)
5427 {
5428 int type = le16_to_cpu(msg->hdr.type);
5429
5430 if (type == CEPH_MSG_OSD_OP)
5431 encode_request_finish(msg);
5432 }
5433
5434 static int osd_sign_message(struct ceph_msg *msg)
5435 {
5436 struct ceph_osd *o = msg->con->private;
5437 struct ceph_auth_handshake *auth = &o->o_auth;
5438
5439 return ceph_auth_sign_message(auth, msg);
5440 }
5441
5442 static int osd_check_message_signature(struct ceph_msg *msg)
5443 {
5444 struct ceph_osd *o = msg->con->private;
5445 struct ceph_auth_handshake *auth = &o->o_auth;
5446
5447 return ceph_auth_check_message_signature(auth, msg);
5448 }
5449
5450 static const struct ceph_connection_operations osd_con_ops = {
5451 .get = get_osd_con,
5452 .put = put_osd_con,
5453 .dispatch = dispatch,
5454 .get_authorizer = get_authorizer,
5455 .add_authorizer_challenge = add_authorizer_challenge,
5456 .verify_authorizer_reply = verify_authorizer_reply,
5457 .invalidate_authorizer = invalidate_authorizer,
5458 .alloc_msg = alloc_msg,
5459 .reencode_message = osd_reencode_message,
5460 .sign_message = osd_sign_message,
5461 .check_message_signature = osd_check_message_signature,
5462 .fault = osd_fault,
5463 };
Linux with added FPC-III support