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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
27static struct kmem_cache *ceph_osd_request_cache;
28
29static 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
49static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
50static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
51static void link_linger(struct ceph_osd *osd,
52 struct ceph_osd_linger_request *lreq);
53static void unlink_linger(struct ceph_osd *osd,
54 struct ceph_osd_linger_request *lreq);
55static void clear_backoffs(struct ceph_osd *osd);
56
57#if 1
58static 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}
69static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
70{
71 WARN_ON(!rwsem_is_locked(&osdc->lock));
72}
73static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
74{
75 WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
76}
77static 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}
85static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
86{
87 WARN_ON(!mutex_is_locked(&lreq->lock));
88}
89#else
90static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
91static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
92static inline void verify_osd_locked(struct ceph_osd *osd) { }
93static 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 */
103static 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
123static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
124{
125 memset(osd_data, 0, sizeof (*osd_data));
126 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
127}
128
129/*
130 * Consumes @pages if @own_pages is true.
131 */
132static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
133 struct page **pages, u64 length, u32 alignment,
134 bool pages_from_pool, bool own_pages)
135{
136 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
137 osd_data->pages = pages;
138 osd_data->length = length;
139 osd_data->alignment = alignment;
140 osd_data->pages_from_pool = pages_from_pool;
141 osd_data->own_pages = own_pages;
142}
143
144/*
145 * Consumes a ref on @pagelist.
146 */
147static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
148 struct ceph_pagelist *pagelist)
149{
150 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
151 osd_data->pagelist = pagelist;
152}
153
154#ifdef CONFIG_BLOCK
155static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
156 struct ceph_bio_iter *bio_pos,
157 u32 bio_length)
158{
159 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
160 osd_data->bio_pos = *bio_pos;
161 osd_data->bio_length = bio_length;
162}
163#endif /* CONFIG_BLOCK */
164
165static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
166 struct ceph_bvec_iter *bvec_pos,
167 u32 num_bvecs)
168{
169 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
170 osd_data->bvec_pos = *bvec_pos;
171 osd_data->num_bvecs = num_bvecs;
172}
173
174static struct ceph_osd_data *
175osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
176{
177 BUG_ON(which >= osd_req->r_num_ops);
178
179 return &osd_req->r_ops[which].raw_data_in;
180}
181
182struct ceph_osd_data *
183osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
184 unsigned int which)
185{
186 return osd_req_op_data(osd_req, which, extent, osd_data);
187}
188EXPORT_SYMBOL(osd_req_op_extent_osd_data);
189
190void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
191 unsigned int which, struct page **pages,
192 u64 length, u32 alignment,
193 bool pages_from_pool, bool own_pages)
194{
195 struct ceph_osd_data *osd_data;
196
197 osd_data = osd_req_op_raw_data_in(osd_req, which);
198 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
199 pages_from_pool, own_pages);
200}
201EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
202
203void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
204 unsigned int which, struct page **pages,
205 u64 length, u32 alignment,
206 bool pages_from_pool, bool own_pages)
207{
208 struct ceph_osd_data *osd_data;
209
210 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
211 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
212 pages_from_pool, own_pages);
213}
214EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
215
216void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
217 unsigned int which, struct ceph_pagelist *pagelist)
218{
219 struct ceph_osd_data *osd_data;
220
221 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
222 ceph_osd_data_pagelist_init(osd_data, pagelist);
223}
224EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
225
226#ifdef CONFIG_BLOCK
227void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
228 unsigned int which,
229 struct ceph_bio_iter *bio_pos,
230 u32 bio_length)
231{
232 struct ceph_osd_data *osd_data;
233
234 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
235 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
236}
237EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
238#endif /* CONFIG_BLOCK */
239
240void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
241 unsigned int which,
242 struct bio_vec *bvecs, u32 num_bvecs,
243 u32 bytes)
244{
245 struct ceph_osd_data *osd_data;
246 struct ceph_bvec_iter it = {
247 .bvecs = bvecs,
248 .iter = { .bi_size = bytes },
249 };
250
251 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
252 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
253}
254EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
255
256void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
257 unsigned int which,
258 struct ceph_bvec_iter *bvec_pos)
259{
260 struct ceph_osd_data *osd_data;
261
262 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
263 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
264}
265EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
266
267static void osd_req_op_cls_request_info_pagelist(
268 struct ceph_osd_request *osd_req,
269 unsigned int which, struct ceph_pagelist *pagelist)
270{
271 struct ceph_osd_data *osd_data;
272
273 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
274 ceph_osd_data_pagelist_init(osd_data, pagelist);
275}
276
277void osd_req_op_cls_request_data_pagelist(
278 struct ceph_osd_request *osd_req,
279 unsigned int which, struct ceph_pagelist *pagelist)
280{
281 struct ceph_osd_data *osd_data;
282
283 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
284 ceph_osd_data_pagelist_init(osd_data, pagelist);
285 osd_req->r_ops[which].cls.indata_len += pagelist->length;
286 osd_req->r_ops[which].indata_len += pagelist->length;
287}
288EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
289
290void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
291 unsigned int which, struct page **pages, u64 length,
292 u32 alignment, bool pages_from_pool, bool own_pages)
293{
294 struct ceph_osd_data *osd_data;
295
296 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
297 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
298 pages_from_pool, own_pages);
299 osd_req->r_ops[which].cls.indata_len += length;
300 osd_req->r_ops[which].indata_len += length;
301}
302EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
303
304void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
305 unsigned int which,
306 struct bio_vec *bvecs, u32 num_bvecs,
307 u32 bytes)
308{
309 struct ceph_osd_data *osd_data;
310 struct ceph_bvec_iter it = {
311 .bvecs = bvecs,
312 .iter = { .bi_size = bytes },
313 };
314
315 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
316 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
317 osd_req->r_ops[which].cls.indata_len += bytes;
318 osd_req->r_ops[which].indata_len += bytes;
319}
320EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
321
322void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
323 unsigned int which, struct page **pages, u64 length,
324 u32 alignment, bool pages_from_pool, bool own_pages)
325{
326 struct ceph_osd_data *osd_data;
327
328 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
329 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
330 pages_from_pool, own_pages);
331}
332EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
333
334static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
335{
336 switch (osd_data->type) {
337 case CEPH_OSD_DATA_TYPE_NONE:
338 return 0;
339 case CEPH_OSD_DATA_TYPE_PAGES:
340 return osd_data->length;
341 case CEPH_OSD_DATA_TYPE_PAGELIST:
342 return (u64)osd_data->pagelist->length;
343#ifdef CONFIG_BLOCK
344 case CEPH_OSD_DATA_TYPE_BIO:
345 return (u64)osd_data->bio_length;
346#endif /* CONFIG_BLOCK */
347 case CEPH_OSD_DATA_TYPE_BVECS:
348 return osd_data->bvec_pos.iter.bi_size;
349 default:
350 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
351 return 0;
352 }
353}
354
355static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
356{
357 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
358 int num_pages;
359
360 num_pages = calc_pages_for((u64)osd_data->alignment,
361 (u64)osd_data->length);
362 ceph_release_page_vector(osd_data->pages, num_pages);
363 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
364 ceph_pagelist_release(osd_data->pagelist);
365 }
366 ceph_osd_data_init(osd_data);
367}
368
369static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
370 unsigned int which)
371{
372 struct ceph_osd_req_op *op;
373
374 BUG_ON(which >= osd_req->r_num_ops);
375 op = &osd_req->r_ops[which];
376
377 switch (op->op) {
378 case CEPH_OSD_OP_READ:
379 case CEPH_OSD_OP_WRITE:
380 case CEPH_OSD_OP_WRITEFULL:
381 ceph_osd_data_release(&op->extent.osd_data);
382 break;
383 case CEPH_OSD_OP_CALL:
384 ceph_osd_data_release(&op->cls.request_info);
385 ceph_osd_data_release(&op->cls.request_data);
386 ceph_osd_data_release(&op->cls.response_data);
387 break;
388 case CEPH_OSD_OP_SETXATTR:
389 case CEPH_OSD_OP_CMPXATTR:
390 ceph_osd_data_release(&op->xattr.osd_data);
391 break;
392 case CEPH_OSD_OP_STAT:
393 ceph_osd_data_release(&op->raw_data_in);
394 break;
395 case CEPH_OSD_OP_NOTIFY_ACK:
396 ceph_osd_data_release(&op->notify_ack.request_data);
397 break;
398 case CEPH_OSD_OP_NOTIFY:
399 ceph_osd_data_release(&op->notify.request_data);
400 ceph_osd_data_release(&op->notify.response_data);
401 break;
402 case CEPH_OSD_OP_LIST_WATCHERS:
403 ceph_osd_data_release(&op->list_watchers.response_data);
404 break;
405 case CEPH_OSD_OP_COPY_FROM2:
406 ceph_osd_data_release(&op->copy_from.osd_data);
407 break;
408 default:
409 break;
410 }
411}
412
413/*
414 * Assumes @t is zero-initialized.
415 */
416static void target_init(struct ceph_osd_request_target *t)
417{
418 ceph_oid_init(&t->base_oid);
419 ceph_oloc_init(&t->base_oloc);
420 ceph_oid_init(&t->target_oid);
421 ceph_oloc_init(&t->target_oloc);
422
423 ceph_osds_init(&t->acting);
424 ceph_osds_init(&t->up);
425 t->size = -1;
426 t->min_size = -1;
427
428 t->osd = CEPH_HOMELESS_OSD;
429}
430
431static void target_copy(struct ceph_osd_request_target *dest,
432 const struct ceph_osd_request_target *src)
433{
434 ceph_oid_copy(&dest->base_oid, &src->base_oid);
435 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
436 ceph_oid_copy(&dest->target_oid, &src->target_oid);
437 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
438
439 dest->pgid = src->pgid; /* struct */
440 dest->spgid = src->spgid; /* struct */
441 dest->pg_num = src->pg_num;
442 dest->pg_num_mask = src->pg_num_mask;
443 ceph_osds_copy(&dest->acting, &src->acting);
444 ceph_osds_copy(&dest->up, &src->up);
445 dest->size = src->size;
446 dest->min_size = src->min_size;
447 dest->sort_bitwise = src->sort_bitwise;
448 dest->recovery_deletes = src->recovery_deletes;
449
450 dest->flags = src->flags;
451 dest->used_replica = src->used_replica;
452 dest->paused = src->paused;
453
454 dest->epoch = src->epoch;
455 dest->last_force_resend = src->last_force_resend;
456
457 dest->osd = src->osd;
458}
459
460static void target_destroy(struct ceph_osd_request_target *t)
461{
462 ceph_oid_destroy(&t->base_oid);
463 ceph_oloc_destroy(&t->base_oloc);
464 ceph_oid_destroy(&t->target_oid);
465 ceph_oloc_destroy(&t->target_oloc);
466}
467
468/*
469 * requests
470 */
471static void request_release_checks(struct ceph_osd_request *req)
472{
473 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
474 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
475 WARN_ON(!list_empty(&req->r_private_item));
476 WARN_ON(req->r_osd);
477}
478
479static void ceph_osdc_release_request(struct kref *kref)
480{
481 struct ceph_osd_request *req = container_of(kref,
482 struct ceph_osd_request, r_kref);
483 unsigned int which;
484
485 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
486 req->r_request, req->r_reply);
487 request_release_checks(req);
488
489 if (req->r_request)
490 ceph_msg_put(req->r_request);
491 if (req->r_reply)
492 ceph_msg_put(req->r_reply);
493
494 for (which = 0; which < req->r_num_ops; which++)
495 osd_req_op_data_release(req, which);
496
497 target_destroy(&req->r_t);
498 ceph_put_snap_context(req->r_snapc);
499
500 if (req->r_mempool)
501 mempool_free(req, req->r_osdc->req_mempool);
502 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
503 kmem_cache_free(ceph_osd_request_cache, req);
504 else
505 kfree(req);
506}
507
508void ceph_osdc_get_request(struct ceph_osd_request *req)
509{
510 dout("%s %p (was %d)\n", __func__, req,
511 kref_read(&req->r_kref));
512 kref_get(&req->r_kref);
513}
514EXPORT_SYMBOL(ceph_osdc_get_request);
515
516void ceph_osdc_put_request(struct ceph_osd_request *req)
517{
518 if (req) {
519 dout("%s %p (was %d)\n", __func__, req,
520 kref_read(&req->r_kref));
521 kref_put(&req->r_kref, ceph_osdc_release_request);
522 }
523}
524EXPORT_SYMBOL(ceph_osdc_put_request);
525
526static void request_init(struct ceph_osd_request *req)
527{
528 /* req only, each op is zeroed in osd_req_op_init() */
529 memset(req, 0, sizeof(*req));
530
531 kref_init(&req->r_kref);
532 init_completion(&req->r_completion);
533 RB_CLEAR_NODE(&req->r_node);
534 RB_CLEAR_NODE(&req->r_mc_node);
535 INIT_LIST_HEAD(&req->r_private_item);
536
537 target_init(&req->r_t);
538}
539
540struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
541 struct ceph_snap_context *snapc,
542 unsigned int num_ops,
543 bool use_mempool,
544 gfp_t gfp_flags)
545{
546 struct ceph_osd_request *req;
547
548 if (use_mempool) {
549 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
550 req = mempool_alloc(osdc->req_mempool, gfp_flags);
551 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
552 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
553 } else {
554 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
555 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
556 }
557 if (unlikely(!req))
558 return NULL;
559
560 request_init(req);
561 req->r_osdc = osdc;
562 req->r_mempool = use_mempool;
563 req->r_num_ops = num_ops;
564 req->r_snapid = CEPH_NOSNAP;
565 req->r_snapc = ceph_get_snap_context(snapc);
566
567 dout("%s req %p\n", __func__, req);
568 return req;
569}
570EXPORT_SYMBOL(ceph_osdc_alloc_request);
571
572static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
573{
574 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
575}
576
577static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
578 int num_request_data_items,
579 int num_reply_data_items)
580{
581 struct ceph_osd_client *osdc = req->r_osdc;
582 struct ceph_msg *msg;
583 int msg_size;
584
585 WARN_ON(req->r_request || req->r_reply);
586 WARN_ON(ceph_oid_empty(&req->r_base_oid));
587 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
588
589 /* create request message */
590 msg_size = CEPH_ENCODING_START_BLK_LEN +
591 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
592 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
593 msg_size += CEPH_ENCODING_START_BLK_LEN +
594 sizeof(struct ceph_osd_reqid); /* reqid */
595 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
596 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
597 msg_size += CEPH_ENCODING_START_BLK_LEN +
598 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
599 msg_size += 4 + req->r_base_oid.name_len; /* oid */
600 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
601 msg_size += 8; /* snapid */
602 msg_size += 8; /* snap_seq */
603 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
604 msg_size += 4 + 8; /* retry_attempt, features */
605
606 if (req->r_mempool)
607 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
608 num_request_data_items);
609 else
610 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
611 num_request_data_items, gfp, true);
612 if (!msg)
613 return -ENOMEM;
614
615 memset(msg->front.iov_base, 0, msg->front.iov_len);
616 req->r_request = msg;
617
618 /* create reply message */
619 msg_size = OSD_OPREPLY_FRONT_LEN;
620 msg_size += req->r_base_oid.name_len;
621 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
622
623 if (req->r_mempool)
624 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
625 num_reply_data_items);
626 else
627 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
628 num_reply_data_items, gfp, true);
629 if (!msg)
630 return -ENOMEM;
631
632 req->r_reply = msg;
633
634 return 0;
635}
636
637static bool osd_req_opcode_valid(u16 opcode)
638{
639 switch (opcode) {
640#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
641__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
642#undef GENERATE_CASE
643 default:
644 return false;
645 }
646}
647
648static void get_num_data_items(struct ceph_osd_request *req,
649 int *num_request_data_items,
650 int *num_reply_data_items)
651{
652 struct ceph_osd_req_op *op;
653
654 *num_request_data_items = 0;
655 *num_reply_data_items = 0;
656
657 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
658 switch (op->op) {
659 /* request */
660 case CEPH_OSD_OP_WRITE:
661 case CEPH_OSD_OP_WRITEFULL:
662 case CEPH_OSD_OP_SETXATTR:
663 case CEPH_OSD_OP_CMPXATTR:
664 case CEPH_OSD_OP_NOTIFY_ACK:
665 case CEPH_OSD_OP_COPY_FROM2:
666 *num_request_data_items += 1;
667 break;
668
669 /* reply */
670 case CEPH_OSD_OP_STAT:
671 case CEPH_OSD_OP_READ:
672 case CEPH_OSD_OP_LIST_WATCHERS:
673 *num_reply_data_items += 1;
674 break;
675
676 /* both */
677 case CEPH_OSD_OP_NOTIFY:
678 *num_request_data_items += 1;
679 *num_reply_data_items += 1;
680 break;
681 case CEPH_OSD_OP_CALL:
682 *num_request_data_items += 2;
683 *num_reply_data_items += 1;
684 break;
685
686 default:
687 WARN_ON(!osd_req_opcode_valid(op->op));
688 break;
689 }
690 }
691}
692
693/*
694 * oid, oloc and OSD op opcode(s) must be filled in before this function
695 * is called.
696 */
697int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
698{
699 int num_request_data_items, num_reply_data_items;
700
701 get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
702 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
703 num_reply_data_items);
704}
705EXPORT_SYMBOL(ceph_osdc_alloc_messages);
706
707/*
708 * This is an osd op init function for opcodes that have no data or
709 * other information associated with them. It also serves as a
710 * common init routine for all the other init functions, below.
711 */
712struct ceph_osd_req_op *
713osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
714 u16 opcode, u32 flags)
715{
716 struct ceph_osd_req_op *op;
717
718 BUG_ON(which >= osd_req->r_num_ops);
719 BUG_ON(!osd_req_opcode_valid(opcode));
720
721 op = &osd_req->r_ops[which];
722 memset(op, 0, sizeof (*op));
723 op->op = opcode;
724 op->flags = flags;
725
726 return op;
727}
728EXPORT_SYMBOL(osd_req_op_init);
729
730void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
731 unsigned int which, u16 opcode,
732 u64 offset, u64 length,
733 u64 truncate_size, u32 truncate_seq)
734{
735 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
736 opcode, 0);
737 size_t payload_len = 0;
738
739 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
740 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
741 opcode != CEPH_OSD_OP_TRUNCATE);
742
743 op->extent.offset = offset;
744 op->extent.length = length;
745 op->extent.truncate_size = truncate_size;
746 op->extent.truncate_seq = truncate_seq;
747 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
748 payload_len += length;
749
750 op->indata_len = payload_len;
751}
752EXPORT_SYMBOL(osd_req_op_extent_init);
753
754void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
755 unsigned int which, u64 length)
756{
757 struct ceph_osd_req_op *op;
758 u64 previous;
759
760 BUG_ON(which >= osd_req->r_num_ops);
761 op = &osd_req->r_ops[which];
762 previous = op->extent.length;
763
764 if (length == previous)
765 return; /* Nothing to do */
766 BUG_ON(length > previous);
767
768 op->extent.length = length;
769 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
770 op->indata_len -= previous - length;
771}
772EXPORT_SYMBOL(osd_req_op_extent_update);
773
774void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
775 unsigned int which, u64 offset_inc)
776{
777 struct ceph_osd_req_op *op, *prev_op;
778
779 BUG_ON(which + 1 >= osd_req->r_num_ops);
780
781 prev_op = &osd_req->r_ops[which];
782 op = osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
783 /* dup previous one */
784 op->indata_len = prev_op->indata_len;
785 op->outdata_len = prev_op->outdata_len;
786 op->extent = prev_op->extent;
787 /* adjust offset */
788 op->extent.offset += offset_inc;
789 op->extent.length -= offset_inc;
790
791 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
792 op->indata_len -= offset_inc;
793}
794EXPORT_SYMBOL(osd_req_op_extent_dup_last);
795
796int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
797 const char *class, const char *method)
798{
799 struct ceph_osd_req_op *op;
800 struct ceph_pagelist *pagelist;
801 size_t payload_len = 0;
802 size_t size;
803 int ret;
804
805 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
806
807 pagelist = ceph_pagelist_alloc(GFP_NOFS);
808 if (!pagelist)
809 return -ENOMEM;
810
811 op->cls.class_name = class;
812 size = strlen(class);
813 BUG_ON(size > (size_t) U8_MAX);
814 op->cls.class_len = size;
815 ret = ceph_pagelist_append(pagelist, class, size);
816 if (ret)
817 goto err_pagelist_free;
818 payload_len += size;
819
820 op->cls.method_name = method;
821 size = strlen(method);
822 BUG_ON(size > (size_t) U8_MAX);
823 op->cls.method_len = size;
824 ret = ceph_pagelist_append(pagelist, method, size);
825 if (ret)
826 goto err_pagelist_free;
827 payload_len += size;
828
829 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
830 op->indata_len = payload_len;
831 return 0;
832
833err_pagelist_free:
834 ceph_pagelist_release(pagelist);
835 return ret;
836}
837EXPORT_SYMBOL(osd_req_op_cls_init);
838
839int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
840 u16 opcode, const char *name, const void *value,
841 size_t size, u8 cmp_op, u8 cmp_mode)
842{
843 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
844 opcode, 0);
845 struct ceph_pagelist *pagelist;
846 size_t payload_len;
847 int ret;
848
849 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
850
851 pagelist = ceph_pagelist_alloc(GFP_NOFS);
852 if (!pagelist)
853 return -ENOMEM;
854
855 payload_len = strlen(name);
856 op->xattr.name_len = payload_len;
857 ret = ceph_pagelist_append(pagelist, name, payload_len);
858 if (ret)
859 goto err_pagelist_free;
860
861 op->xattr.value_len = size;
862 ret = ceph_pagelist_append(pagelist, value, size);
863 if (ret)
864 goto err_pagelist_free;
865 payload_len += size;
866
867 op->xattr.cmp_op = cmp_op;
868 op->xattr.cmp_mode = cmp_mode;
869
870 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
871 op->indata_len = payload_len;
872 return 0;
873
874err_pagelist_free:
875 ceph_pagelist_release(pagelist);
876 return ret;
877}
878EXPORT_SYMBOL(osd_req_op_xattr_init);
879
880/*
881 * @watch_opcode: CEPH_OSD_WATCH_OP_*
882 */
883static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
884 u8 watch_opcode, u64 cookie, u32 gen)
885{
886 struct ceph_osd_req_op *op;
887
888 op = osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
889 op->watch.cookie = cookie;
890 op->watch.op = watch_opcode;
891 op->watch.gen = gen;
892}
893
894/*
895 * prot_ver, timeout and notify payload (may be empty) should already be
896 * encoded in @request_pl
897 */
898static void osd_req_op_notify_init(struct ceph_osd_request *req, int which,
899 u64 cookie, struct ceph_pagelist *request_pl)
900{
901 struct ceph_osd_req_op *op;
902
903 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
904 op->notify.cookie = cookie;
905
906 ceph_osd_data_pagelist_init(&op->notify.request_data, request_pl);
907 op->indata_len = request_pl->length;
908}
909
910/*
911 * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_*
912 */
913void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
914 unsigned int which,
915 u64 expected_object_size,
916 u64 expected_write_size,
917 u32 flags)
918{
919 struct ceph_osd_req_op *op;
920
921 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_SETALLOCHINT, 0);
922 op->alloc_hint.expected_object_size = expected_object_size;
923 op->alloc_hint.expected_write_size = expected_write_size;
924 op->alloc_hint.flags = flags;
925
926 /*
927 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
928 * not worth a feature bit. Set FAILOK per-op flag to make
929 * sure older osds don't trip over an unsupported opcode.
930 */
931 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
932}
933EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
934
935static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
936 struct ceph_osd_data *osd_data)
937{
938 u64 length = ceph_osd_data_length(osd_data);
939
940 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
941 BUG_ON(length > (u64) SIZE_MAX);
942 if (length)
943 ceph_msg_data_add_pages(msg, osd_data->pages,
944 length, osd_data->alignment, false);
945 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
946 BUG_ON(!length);
947 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
948#ifdef CONFIG_BLOCK
949 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
950 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
951#endif
952 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
953 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
954 } else {
955 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
956 }
957}
958
959static u32 osd_req_encode_op(struct ceph_osd_op *dst,
960 const struct ceph_osd_req_op *src)
961{
962 switch (src->op) {
963 case CEPH_OSD_OP_STAT:
964 break;
965 case CEPH_OSD_OP_READ:
966 case CEPH_OSD_OP_WRITE:
967 case CEPH_OSD_OP_WRITEFULL:
968 case CEPH_OSD_OP_ZERO:
969 case CEPH_OSD_OP_TRUNCATE:
970 dst->extent.offset = cpu_to_le64(src->extent.offset);
971 dst->extent.length = cpu_to_le64(src->extent.length);
972 dst->extent.truncate_size =
973 cpu_to_le64(src->extent.truncate_size);
974 dst->extent.truncate_seq =
975 cpu_to_le32(src->extent.truncate_seq);
976 break;
977 case CEPH_OSD_OP_CALL:
978 dst->cls.class_len = src->cls.class_len;
979 dst->cls.method_len = src->cls.method_len;
980 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
981 break;
982 case CEPH_OSD_OP_WATCH:
983 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
984 dst->watch.ver = cpu_to_le64(0);
985 dst->watch.op = src->watch.op;
986 dst->watch.gen = cpu_to_le32(src->watch.gen);
987 break;
988 case CEPH_OSD_OP_NOTIFY_ACK:
989 break;
990 case CEPH_OSD_OP_NOTIFY:
991 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
992 break;
993 case CEPH_OSD_OP_LIST_WATCHERS:
994 break;
995 case CEPH_OSD_OP_SETALLOCHINT:
996 dst->alloc_hint.expected_object_size =
997 cpu_to_le64(src->alloc_hint.expected_object_size);
998 dst->alloc_hint.expected_write_size =
999 cpu_to_le64(src->alloc_hint.expected_write_size);
1000 dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags);
1001 break;
1002 case CEPH_OSD_OP_SETXATTR:
1003 case CEPH_OSD_OP_CMPXATTR:
1004 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1005 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1006 dst->xattr.cmp_op = src->xattr.cmp_op;
1007 dst->xattr.cmp_mode = src->xattr.cmp_mode;
1008 break;
1009 case CEPH_OSD_OP_CREATE:
1010 case CEPH_OSD_OP_DELETE:
1011 break;
1012 case CEPH_OSD_OP_COPY_FROM2:
1013 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1014 dst->copy_from.src_version =
1015 cpu_to_le64(src->copy_from.src_version);
1016 dst->copy_from.flags = src->copy_from.flags;
1017 dst->copy_from.src_fadvise_flags =
1018 cpu_to_le32(src->copy_from.src_fadvise_flags);
1019 break;
1020 default:
1021 pr_err("unsupported osd opcode %s\n",
1022 ceph_osd_op_name(src->op));
1023 WARN_ON(1);
1024
1025 return 0;
1026 }
1027
1028 dst->op = cpu_to_le16(src->op);
1029 dst->flags = cpu_to_le32(src->flags);
1030 dst->payload_len = cpu_to_le32(src->indata_len);
1031
1032 return src->indata_len;
1033}
1034
1035/*
1036 * build new request AND message, calculate layout, and adjust file
1037 * extent as needed.
1038 *
1039 * if the file was recently truncated, we include information about its
1040 * old and new size so that the object can be updated appropriately. (we
1041 * avoid synchronously deleting truncated objects because it's slow.)
1042 */
1043struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1044 struct ceph_file_layout *layout,
1045 struct ceph_vino vino,
1046 u64 off, u64 *plen,
1047 unsigned int which, int num_ops,
1048 int opcode, int flags,
1049 struct ceph_snap_context *snapc,
1050 u32 truncate_seq,
1051 u64 truncate_size,
1052 bool use_mempool)
1053{
1054 struct ceph_osd_request *req;
1055 u64 objnum = 0;
1056 u64 objoff = 0;
1057 u64 objlen = 0;
1058 int r;
1059
1060 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
1061 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1062 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
1063
1064 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
1065 GFP_NOFS);
1066 if (!req) {
1067 r = -ENOMEM;
1068 goto fail;
1069 }
1070
1071 /* calculate max write size */
1072 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
1073 if (r)
1074 goto fail;
1075
1076 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
1077 osd_req_op_init(req, which, opcode, 0);
1078 } else {
1079 u32 object_size = layout->object_size;
1080 u32 object_base = off - objoff;
1081 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1082 if (truncate_size <= object_base) {
1083 truncate_size = 0;
1084 } else {
1085 truncate_size -= object_base;
1086 if (truncate_size > object_size)
1087 truncate_size = object_size;
1088 }
1089 }
1090 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1091 truncate_size, truncate_seq);
1092 }
1093
1094 req->r_base_oloc.pool = layout->pool_id;
1095 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1096 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1097 req->r_flags = flags | osdc->client->options->read_from_replica;
1098
1099 req->r_snapid = vino.snap;
1100 if (flags & CEPH_OSD_FLAG_WRITE)
1101 req->r_data_offset = off;
1102
1103 if (num_ops > 1)
1104 /*
1105 * This is a special case for ceph_writepages_start(), but it
1106 * also covers ceph_uninline_data(). If more multi-op request
1107 * use cases emerge, we will need a separate helper.
1108 */
1109 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
1110 else
1111 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
1112 if (r)
1113 goto fail;
1114
1115 return req;
1116
1117fail:
1118 ceph_osdc_put_request(req);
1119 return ERR_PTR(r);
1120}
1121EXPORT_SYMBOL(ceph_osdc_new_request);
1122
1123/*
1124 * We keep osd requests in an rbtree, sorted by ->r_tid.
1125 */
1126DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
1127DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
1128
1129/*
1130 * Call @fn on each OSD request as long as @fn returns 0.
1131 */
1132static void for_each_request(struct ceph_osd_client *osdc,
1133 int (*fn)(struct ceph_osd_request *req, void *arg),
1134 void *arg)
1135{
1136 struct rb_node *n, *p;
1137
1138 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1139 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1140
1141 for (p = rb_first(&osd->o_requests); p; ) {
1142 struct ceph_osd_request *req =
1143 rb_entry(p, struct ceph_osd_request, r_node);
1144
1145 p = rb_next(p);
1146 if (fn(req, arg))
1147 return;
1148 }
1149 }
1150
1151 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1152 struct ceph_osd_request *req =
1153 rb_entry(p, struct ceph_osd_request, r_node);
1154
1155 p = rb_next(p);
1156 if (fn(req, arg))
1157 return;
1158 }
1159}
1160
1161static bool osd_homeless(struct ceph_osd *osd)
1162{
1163 return osd->o_osd == CEPH_HOMELESS_OSD;
1164}
1165
1166static bool osd_registered(struct ceph_osd *osd)
1167{
1168 verify_osdc_locked(osd->o_osdc);
1169
1170 return !RB_EMPTY_NODE(&osd->o_node);
1171}
1172
1173/*
1174 * Assumes @osd is zero-initialized.
1175 */
1176static void osd_init(struct ceph_osd *osd)
1177{
1178 refcount_set(&osd->o_ref, 1);
1179 RB_CLEAR_NODE(&osd->o_node);
1180 osd->o_requests = RB_ROOT;
1181 osd->o_linger_requests = RB_ROOT;
1182 osd->o_backoff_mappings = RB_ROOT;
1183 osd->o_backoffs_by_id = RB_ROOT;
1184 INIT_LIST_HEAD(&osd->o_osd_lru);
1185 INIT_LIST_HEAD(&osd->o_keepalive_item);
1186 osd->o_incarnation = 1;
1187 mutex_init(&osd->lock);
1188}
1189
1190static void osd_cleanup(struct ceph_osd *osd)
1191{
1192 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1193 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1194 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1195 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1196 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1197 WARN_ON(!list_empty(&osd->o_osd_lru));
1198 WARN_ON(!list_empty(&osd->o_keepalive_item));
1199
1200 if (osd->o_auth.authorizer) {
1201 WARN_ON(osd_homeless(osd));
1202 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1203 }
1204}
1205
1206/*
1207 * Track open sessions with osds.
1208 */
1209static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1210{
1211 struct ceph_osd *osd;
1212
1213 WARN_ON(onum == CEPH_HOMELESS_OSD);
1214
1215 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1216 osd_init(osd);
1217 osd->o_osdc = osdc;
1218 osd->o_osd = onum;
1219
1220 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1221
1222 return osd;
1223}
1224
1225static struct ceph_osd *get_osd(struct ceph_osd *osd)
1226{
1227 if (refcount_inc_not_zero(&osd->o_ref)) {
1228 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1229 refcount_read(&osd->o_ref));
1230 return osd;
1231 } else {
1232 dout("get_osd %p FAIL\n", osd);
1233 return NULL;
1234 }
1235}
1236
1237static void put_osd(struct ceph_osd *osd)
1238{
1239 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1240 refcount_read(&osd->o_ref) - 1);
1241 if (refcount_dec_and_test(&osd->o_ref)) {
1242 osd_cleanup(osd);
1243 kfree(osd);
1244 }
1245}
1246
1247DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1248
1249static void __move_osd_to_lru(struct ceph_osd *osd)
1250{
1251 struct ceph_osd_client *osdc = osd->o_osdc;
1252
1253 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1254 BUG_ON(!list_empty(&osd->o_osd_lru));
1255
1256 spin_lock(&osdc->osd_lru_lock);
1257 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1258 spin_unlock(&osdc->osd_lru_lock);
1259
1260 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1261}
1262
1263static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1264{
1265 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1266 RB_EMPTY_ROOT(&osd->o_linger_requests))
1267 __move_osd_to_lru(osd);
1268}
1269
1270static void __remove_osd_from_lru(struct ceph_osd *osd)
1271{
1272 struct ceph_osd_client *osdc = osd->o_osdc;
1273
1274 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1275
1276 spin_lock(&osdc->osd_lru_lock);
1277 if (!list_empty(&osd->o_osd_lru))
1278 list_del_init(&osd->o_osd_lru);
1279 spin_unlock(&osdc->osd_lru_lock);
1280}
1281
1282/*
1283 * Close the connection and assign any leftover requests to the
1284 * homeless session.
1285 */
1286static void close_osd(struct ceph_osd *osd)
1287{
1288 struct ceph_osd_client *osdc = osd->o_osdc;
1289 struct rb_node *n;
1290
1291 verify_osdc_wrlocked(osdc);
1292 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1293
1294 ceph_con_close(&osd->o_con);
1295
1296 for (n = rb_first(&osd->o_requests); n; ) {
1297 struct ceph_osd_request *req =
1298 rb_entry(n, struct ceph_osd_request, r_node);
1299
1300 n = rb_next(n); /* unlink_request() */
1301
1302 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1303 unlink_request(osd, req);
1304 link_request(&osdc->homeless_osd, req);
1305 }
1306 for (n = rb_first(&osd->o_linger_requests); n; ) {
1307 struct ceph_osd_linger_request *lreq =
1308 rb_entry(n, struct ceph_osd_linger_request, node);
1309
1310 n = rb_next(n); /* unlink_linger() */
1311
1312 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1313 lreq->linger_id);
1314 unlink_linger(osd, lreq);
1315 link_linger(&osdc->homeless_osd, lreq);
1316 }
1317 clear_backoffs(osd);
1318
1319 __remove_osd_from_lru(osd);
1320 erase_osd(&osdc->osds, osd);
1321 put_osd(osd);
1322}
1323
1324/*
1325 * reset osd connect
1326 */
1327static int reopen_osd(struct ceph_osd *osd)
1328{
1329 struct ceph_entity_addr *peer_addr;
1330
1331 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1332
1333 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1334 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1335 close_osd(osd);
1336 return -ENODEV;
1337 }
1338
1339 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1340 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1341 !ceph_con_opened(&osd->o_con)) {
1342 struct rb_node *n;
1343
1344 dout("osd addr hasn't changed and connection never opened, "
1345 "letting msgr retry\n");
1346 /* touch each r_stamp for handle_timeout()'s benfit */
1347 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1348 struct ceph_osd_request *req =
1349 rb_entry(n, struct ceph_osd_request, r_node);
1350 req->r_stamp = jiffies;
1351 }
1352
1353 return -EAGAIN;
1354 }
1355
1356 ceph_con_close(&osd->o_con);
1357 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1358 osd->o_incarnation++;
1359
1360 return 0;
1361}
1362
1363static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1364 bool wrlocked)
1365{
1366 struct ceph_osd *osd;
1367
1368 if (wrlocked)
1369 verify_osdc_wrlocked(osdc);
1370 else
1371 verify_osdc_locked(osdc);
1372
1373 if (o != CEPH_HOMELESS_OSD)
1374 osd = lookup_osd(&osdc->osds, o);
1375 else
1376 osd = &osdc->homeless_osd;
1377 if (!osd) {
1378 if (!wrlocked)
1379 return ERR_PTR(-EAGAIN);
1380
1381 osd = create_osd(osdc, o);
1382 insert_osd(&osdc->osds, osd);
1383 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1384 &osdc->osdmap->osd_addr[osd->o_osd]);
1385 }
1386
1387 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1388 return osd;
1389}
1390
1391/*
1392 * Create request <-> OSD session relation.
1393 *
1394 * @req has to be assigned a tid, @osd may be homeless.
1395 */
1396static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1397{
1398 verify_osd_locked(osd);
1399 WARN_ON(!req->r_tid || req->r_osd);
1400 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1401 req, req->r_tid);
1402
1403 if (!osd_homeless(osd))
1404 __remove_osd_from_lru(osd);
1405 else
1406 atomic_inc(&osd->o_osdc->num_homeless);
1407
1408 get_osd(osd);
1409 insert_request(&osd->o_requests, req);
1410 req->r_osd = osd;
1411}
1412
1413static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1414{
1415 verify_osd_locked(osd);
1416 WARN_ON(req->r_osd != osd);
1417 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1418 req, req->r_tid);
1419
1420 req->r_osd = NULL;
1421 erase_request(&osd->o_requests, req);
1422 put_osd(osd);
1423
1424 if (!osd_homeless(osd))
1425 maybe_move_osd_to_lru(osd);
1426 else
1427 atomic_dec(&osd->o_osdc->num_homeless);
1428}
1429
1430static bool __pool_full(struct ceph_pg_pool_info *pi)
1431{
1432 return pi->flags & CEPH_POOL_FLAG_FULL;
1433}
1434
1435static bool have_pool_full(struct ceph_osd_client *osdc)
1436{
1437 struct rb_node *n;
1438
1439 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1440 struct ceph_pg_pool_info *pi =
1441 rb_entry(n, struct ceph_pg_pool_info, node);
1442
1443 if (__pool_full(pi))
1444 return true;
1445 }
1446
1447 return false;
1448}
1449
1450static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1451{
1452 struct ceph_pg_pool_info *pi;
1453
1454 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1455 if (!pi)
1456 return false;
1457
1458 return __pool_full(pi);
1459}
1460
1461/*
1462 * Returns whether a request should be blocked from being sent
1463 * based on the current osdmap and osd_client settings.
1464 */
1465static bool target_should_be_paused(struct ceph_osd_client *osdc,
1466 const struct ceph_osd_request_target *t,
1467 struct ceph_pg_pool_info *pi)
1468{
1469 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1470 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1471 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1472 __pool_full(pi);
1473
1474 WARN_ON(pi->id != t->target_oloc.pool);
1475 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1476 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1477 (osdc->osdmap->epoch < osdc->epoch_barrier);
1478}
1479
1480static int pick_random_replica(const struct ceph_osds *acting)
1481{
1482 int i = get_random_u32_below(acting->size);
1483
1484 dout("%s picked osd%d, primary osd%d\n", __func__,
1485 acting->osds[i], acting->primary);
1486 return i;
1487}
1488
1489/*
1490 * Picks the closest replica based on client's location given by
1491 * crush_location option. Prefers the primary if the locality is
1492 * the same.
1493 */
1494static int pick_closest_replica(struct ceph_osd_client *osdc,
1495 const struct ceph_osds *acting)
1496{
1497 struct ceph_options *opt = osdc->client->options;
1498 int best_i, best_locality;
1499 int i = 0, locality;
1500
1501 do {
1502 locality = ceph_get_crush_locality(osdc->osdmap,
1503 acting->osds[i],
1504 &opt->crush_locs);
1505 if (i == 0 ||
1506 (locality >= 0 && best_locality < 0) ||
1507 (locality >= 0 && best_locality >= 0 &&
1508 locality < best_locality)) {
1509 best_i = i;
1510 best_locality = locality;
1511 }
1512 } while (++i < acting->size);
1513
1514 dout("%s picked osd%d with locality %d, primary osd%d\n", __func__,
1515 acting->osds[best_i], best_locality, acting->primary);
1516 return best_i;
1517}
1518
1519enum calc_target_result {
1520 CALC_TARGET_NO_ACTION = 0,
1521 CALC_TARGET_NEED_RESEND,
1522 CALC_TARGET_POOL_DNE,
1523};
1524
1525static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1526 struct ceph_osd_request_target *t,
1527 bool any_change)
1528{
1529 struct ceph_pg_pool_info *pi;
1530 struct ceph_pg pgid, last_pgid;
1531 struct ceph_osds up, acting;
1532 bool is_read = t->flags & CEPH_OSD_FLAG_READ;
1533 bool is_write = t->flags & CEPH_OSD_FLAG_WRITE;
1534 bool force_resend = false;
1535 bool unpaused = false;
1536 bool legacy_change = false;
1537 bool split = false;
1538 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1539 bool recovery_deletes = ceph_osdmap_flag(osdc,
1540 CEPH_OSDMAP_RECOVERY_DELETES);
1541 enum calc_target_result ct_res;
1542
1543 t->epoch = osdc->osdmap->epoch;
1544 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1545 if (!pi) {
1546 t->osd = CEPH_HOMELESS_OSD;
1547 ct_res = CALC_TARGET_POOL_DNE;
1548 goto out;
1549 }
1550
1551 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1552 if (t->last_force_resend < pi->last_force_request_resend) {
1553 t->last_force_resend = pi->last_force_request_resend;
1554 force_resend = true;
1555 } else if (t->last_force_resend == 0) {
1556 force_resend = true;
1557 }
1558 }
1559
1560 /* apply tiering */
1561 ceph_oid_copy(&t->target_oid, &t->base_oid);
1562 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1563 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1564 if (is_read && pi->read_tier >= 0)
1565 t->target_oloc.pool = pi->read_tier;
1566 if (is_write && pi->write_tier >= 0)
1567 t->target_oloc.pool = pi->write_tier;
1568
1569 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1570 if (!pi) {
1571 t->osd = CEPH_HOMELESS_OSD;
1572 ct_res = CALC_TARGET_POOL_DNE;
1573 goto out;
1574 }
1575 }
1576
1577 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
1578 last_pgid.pool = pgid.pool;
1579 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1580
1581 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1582 if (any_change &&
1583 ceph_is_new_interval(&t->acting,
1584 &acting,
1585 &t->up,
1586 &up,
1587 t->size,
1588 pi->size,
1589 t->min_size,
1590 pi->min_size,
1591 t->pg_num,
1592 pi->pg_num,
1593 t->sort_bitwise,
1594 sort_bitwise,
1595 t->recovery_deletes,
1596 recovery_deletes,
1597 &last_pgid))
1598 force_resend = true;
1599
1600 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1601 t->paused = false;
1602 unpaused = true;
1603 }
1604 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1605 ceph_osds_changed(&t->acting, &acting,
1606 t->used_replica || any_change);
1607 if (t->pg_num)
1608 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1609
1610 if (legacy_change || force_resend || split) {
1611 t->pgid = pgid; /* struct */
1612 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1613 ceph_osds_copy(&t->acting, &acting);
1614 ceph_osds_copy(&t->up, &up);
1615 t->size = pi->size;
1616 t->min_size = pi->min_size;
1617 t->pg_num = pi->pg_num;
1618 t->pg_num_mask = pi->pg_num_mask;
1619 t->sort_bitwise = sort_bitwise;
1620 t->recovery_deletes = recovery_deletes;
1621
1622 if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS |
1623 CEPH_OSD_FLAG_LOCALIZE_READS)) &&
1624 !is_write && pi->type == CEPH_POOL_TYPE_REP &&
1625 acting.size > 1) {
1626 int pos;
1627
1628 WARN_ON(!is_read || acting.osds[0] != acting.primary);
1629 if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) {
1630 pos = pick_random_replica(&acting);
1631 } else {
1632 pos = pick_closest_replica(osdc, &acting);
1633 }
1634 t->osd = acting.osds[pos];
1635 t->used_replica = pos > 0;
1636 } else {
1637 t->osd = acting.primary;
1638 t->used_replica = false;
1639 }
1640 }
1641
1642 if (unpaused || legacy_change || force_resend || split)
1643 ct_res = CALC_TARGET_NEED_RESEND;
1644 else
1645 ct_res = CALC_TARGET_NO_ACTION;
1646
1647out:
1648 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1649 legacy_change, force_resend, split, ct_res, t->osd);
1650 return ct_res;
1651}
1652
1653static struct ceph_spg_mapping *alloc_spg_mapping(void)
1654{
1655 struct ceph_spg_mapping *spg;
1656
1657 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1658 if (!spg)
1659 return NULL;
1660
1661 RB_CLEAR_NODE(&spg->node);
1662 spg->backoffs = RB_ROOT;
1663 return spg;
1664}
1665
1666static void free_spg_mapping(struct ceph_spg_mapping *spg)
1667{
1668 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1669 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1670
1671 kfree(spg);
1672}
1673
1674/*
1675 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1676 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1677 * defined only within a specific spgid; it does not pass anything to
1678 * children on split, or to another primary.
1679 */
1680DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1681 RB_BYPTR, const struct ceph_spg *, node)
1682
1683static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1684{
1685 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1686}
1687
1688static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1689 void **pkey, size_t *pkey_len)
1690{
1691 if (hoid->key_len) {
1692 *pkey = hoid->key;
1693 *pkey_len = hoid->key_len;
1694 } else {
1695 *pkey = hoid->oid;
1696 *pkey_len = hoid->oid_len;
1697 }
1698}
1699
1700static int compare_names(const void *name1, size_t name1_len,
1701 const void *name2, size_t name2_len)
1702{
1703 int ret;
1704
1705 ret = memcmp(name1, name2, min(name1_len, name2_len));
1706 if (!ret) {
1707 if (name1_len < name2_len)
1708 ret = -1;
1709 else if (name1_len > name2_len)
1710 ret = 1;
1711 }
1712 return ret;
1713}
1714
1715static int hoid_compare(const struct ceph_hobject_id *lhs,
1716 const struct ceph_hobject_id *rhs)
1717{
1718 void *effective_key1, *effective_key2;
1719 size_t effective_key1_len, effective_key2_len;
1720 int ret;
1721
1722 if (lhs->is_max < rhs->is_max)
1723 return -1;
1724 if (lhs->is_max > rhs->is_max)
1725 return 1;
1726
1727 if (lhs->pool < rhs->pool)
1728 return -1;
1729 if (lhs->pool > rhs->pool)
1730 return 1;
1731
1732 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1733 return -1;
1734 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1735 return 1;
1736
1737 ret = compare_names(lhs->nspace, lhs->nspace_len,
1738 rhs->nspace, rhs->nspace_len);
1739 if (ret)
1740 return ret;
1741
1742 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1743 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1744 ret = compare_names(effective_key1, effective_key1_len,
1745 effective_key2, effective_key2_len);
1746 if (ret)
1747 return ret;
1748
1749 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1750 if (ret)
1751 return ret;
1752
1753 if (lhs->snapid < rhs->snapid)
1754 return -1;
1755 if (lhs->snapid > rhs->snapid)
1756 return 1;
1757
1758 return 0;
1759}
1760
1761/*
1762 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1763 * compat stuff here.
1764 *
1765 * Assumes @hoid is zero-initialized.
1766 */
1767static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1768{
1769 u8 struct_v;
1770 u32 struct_len;
1771 int ret;
1772
1773 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1774 &struct_len);
1775 if (ret)
1776 return ret;
1777
1778 if (struct_v < 4) {
1779 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1780 goto e_inval;
1781 }
1782
1783 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1784 GFP_NOIO);
1785 if (IS_ERR(hoid->key)) {
1786 ret = PTR_ERR(hoid->key);
1787 hoid->key = NULL;
1788 return ret;
1789 }
1790
1791 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1792 GFP_NOIO);
1793 if (IS_ERR(hoid->oid)) {
1794 ret = PTR_ERR(hoid->oid);
1795 hoid->oid = NULL;
1796 return ret;
1797 }
1798
1799 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1800 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1801 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1802
1803 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1804 GFP_NOIO);
1805 if (IS_ERR(hoid->nspace)) {
1806 ret = PTR_ERR(hoid->nspace);
1807 hoid->nspace = NULL;
1808 return ret;
1809 }
1810
1811 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1812
1813 ceph_hoid_build_hash_cache(hoid);
1814 return 0;
1815
1816e_inval:
1817 return -EINVAL;
1818}
1819
1820static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1821{
1822 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1823 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1824}
1825
1826static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1827{
1828 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1829 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1830 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1831 ceph_encode_64(p, hoid->snapid);
1832 ceph_encode_32(p, hoid->hash);
1833 ceph_encode_8(p, hoid->is_max);
1834 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1835 ceph_encode_64(p, hoid->pool);
1836}
1837
1838static void free_hoid(struct ceph_hobject_id *hoid)
1839{
1840 if (hoid) {
1841 kfree(hoid->key);
1842 kfree(hoid->oid);
1843 kfree(hoid->nspace);
1844 kfree(hoid);
1845 }
1846}
1847
1848static struct ceph_osd_backoff *alloc_backoff(void)
1849{
1850 struct ceph_osd_backoff *backoff;
1851
1852 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1853 if (!backoff)
1854 return NULL;
1855
1856 RB_CLEAR_NODE(&backoff->spg_node);
1857 RB_CLEAR_NODE(&backoff->id_node);
1858 return backoff;
1859}
1860
1861static void free_backoff(struct ceph_osd_backoff *backoff)
1862{
1863 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1864 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1865
1866 free_hoid(backoff->begin);
1867 free_hoid(backoff->end);
1868 kfree(backoff);
1869}
1870
1871/*
1872 * Within a specific spgid, backoffs are managed by ->begin hoid.
1873 */
1874DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1875 RB_BYVAL, spg_node);
1876
1877static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1878 const struct ceph_hobject_id *hoid)
1879{
1880 struct rb_node *n = root->rb_node;
1881
1882 while (n) {
1883 struct ceph_osd_backoff *cur =
1884 rb_entry(n, struct ceph_osd_backoff, spg_node);
1885 int cmp;
1886
1887 cmp = hoid_compare(hoid, cur->begin);
1888 if (cmp < 0) {
1889 n = n->rb_left;
1890 } else if (cmp > 0) {
1891 if (hoid_compare(hoid, cur->end) < 0)
1892 return cur;
1893
1894 n = n->rb_right;
1895 } else {
1896 return cur;
1897 }
1898 }
1899
1900 return NULL;
1901}
1902
1903/*
1904 * Each backoff has a unique id within its OSD session.
1905 */
1906DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1907
1908static void clear_backoffs(struct ceph_osd *osd)
1909{
1910 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1911 struct ceph_spg_mapping *spg =
1912 rb_entry(rb_first(&osd->o_backoff_mappings),
1913 struct ceph_spg_mapping, node);
1914
1915 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1916 struct ceph_osd_backoff *backoff =
1917 rb_entry(rb_first(&spg->backoffs),
1918 struct ceph_osd_backoff, spg_node);
1919
1920 erase_backoff(&spg->backoffs, backoff);
1921 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1922 free_backoff(backoff);
1923 }
1924 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1925 free_spg_mapping(spg);
1926 }
1927}
1928
1929/*
1930 * Set up a temporary, non-owning view into @t.
1931 */
1932static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1933 const struct ceph_osd_request_target *t)
1934{
1935 hoid->key = NULL;
1936 hoid->key_len = 0;
1937 hoid->oid = t->target_oid.name;
1938 hoid->oid_len = t->target_oid.name_len;
1939 hoid->snapid = CEPH_NOSNAP;
1940 hoid->hash = t->pgid.seed;
1941 hoid->is_max = false;
1942 if (t->target_oloc.pool_ns) {
1943 hoid->nspace = t->target_oloc.pool_ns->str;
1944 hoid->nspace_len = t->target_oloc.pool_ns->len;
1945 } else {
1946 hoid->nspace = NULL;
1947 hoid->nspace_len = 0;
1948 }
1949 hoid->pool = t->target_oloc.pool;
1950 ceph_hoid_build_hash_cache(hoid);
1951}
1952
1953static bool should_plug_request(struct ceph_osd_request *req)
1954{
1955 struct ceph_osd *osd = req->r_osd;
1956 struct ceph_spg_mapping *spg;
1957 struct ceph_osd_backoff *backoff;
1958 struct ceph_hobject_id hoid;
1959
1960 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1961 if (!spg)
1962 return false;
1963
1964 hoid_fill_from_target(&hoid, &req->r_t);
1965 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1966 if (!backoff)
1967 return false;
1968
1969 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1970 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1971 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1972 return true;
1973}
1974
1975/*
1976 * Keep get_num_data_items() in sync with this function.
1977 */
1978static void setup_request_data(struct ceph_osd_request *req)
1979{
1980 struct ceph_msg *request_msg = req->r_request;
1981 struct ceph_msg *reply_msg = req->r_reply;
1982 struct ceph_osd_req_op *op;
1983
1984 if (req->r_request->num_data_items || req->r_reply->num_data_items)
1985 return;
1986
1987 WARN_ON(request_msg->data_length || reply_msg->data_length);
1988 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
1989 switch (op->op) {
1990 /* request */
1991 case CEPH_OSD_OP_WRITE:
1992 case CEPH_OSD_OP_WRITEFULL:
1993 WARN_ON(op->indata_len != op->extent.length);
1994 ceph_osdc_msg_data_add(request_msg,
1995 &op->extent.osd_data);
1996 break;
1997 case CEPH_OSD_OP_SETXATTR:
1998 case CEPH_OSD_OP_CMPXATTR:
1999 WARN_ON(op->indata_len != op->xattr.name_len +
2000 op->xattr.value_len);
2001 ceph_osdc_msg_data_add(request_msg,
2002 &op->xattr.osd_data);
2003 break;
2004 case CEPH_OSD_OP_NOTIFY_ACK:
2005 ceph_osdc_msg_data_add(request_msg,
2006 &op->notify_ack.request_data);
2007 break;
2008 case CEPH_OSD_OP_COPY_FROM2:
2009 ceph_osdc_msg_data_add(request_msg,
2010 &op->copy_from.osd_data);
2011 break;
2012
2013 /* reply */
2014 case CEPH_OSD_OP_STAT:
2015 ceph_osdc_msg_data_add(reply_msg,
2016 &op->raw_data_in);
2017 break;
2018 case CEPH_OSD_OP_READ:
2019 ceph_osdc_msg_data_add(reply_msg,
2020 &op->extent.osd_data);
2021 break;
2022 case CEPH_OSD_OP_LIST_WATCHERS:
2023 ceph_osdc_msg_data_add(reply_msg,
2024 &op->list_watchers.response_data);
2025 break;
2026
2027 /* both */
2028 case CEPH_OSD_OP_CALL:
2029 WARN_ON(op->indata_len != op->cls.class_len +
2030 op->cls.method_len +
2031 op->cls.indata_len);
2032 ceph_osdc_msg_data_add(request_msg,
2033 &op->cls.request_info);
2034 /* optional, can be NONE */
2035 ceph_osdc_msg_data_add(request_msg,
2036 &op->cls.request_data);
2037 /* optional, can be NONE */
2038 ceph_osdc_msg_data_add(reply_msg,
2039 &op->cls.response_data);
2040 break;
2041 case CEPH_OSD_OP_NOTIFY:
2042 ceph_osdc_msg_data_add(request_msg,
2043 &op->notify.request_data);
2044 ceph_osdc_msg_data_add(reply_msg,
2045 &op->notify.response_data);
2046 break;
2047 }
2048 }
2049}
2050
2051static void encode_pgid(void **p, const struct ceph_pg *pgid)
2052{
2053 ceph_encode_8(p, 1);
2054 ceph_encode_64(p, pgid->pool);
2055 ceph_encode_32(p, pgid->seed);
2056 ceph_encode_32(p, -1); /* preferred */
2057}
2058
2059static void encode_spgid(void **p, const struct ceph_spg *spgid)
2060{
2061 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2062 encode_pgid(p, &spgid->pgid);
2063 ceph_encode_8(p, spgid->shard);
2064}
2065
2066static void encode_oloc(void **p, void *end,
2067 const struct ceph_object_locator *oloc)
2068{
2069 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2070 ceph_encode_64(p, oloc->pool);
2071 ceph_encode_32(p, -1); /* preferred */
2072 ceph_encode_32(p, 0); /* key len */
2073 if (oloc->pool_ns)
2074 ceph_encode_string(p, end, oloc->pool_ns->str,
2075 oloc->pool_ns->len);
2076 else
2077 ceph_encode_32(p, 0);
2078}
2079
2080static void encode_request_partial(struct ceph_osd_request *req,
2081 struct ceph_msg *msg)
2082{
2083 void *p = msg->front.iov_base;
2084 void *const end = p + msg->front_alloc_len;
2085 u32 data_len = 0;
2086 int i;
2087
2088 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2089 /* snapshots aren't writeable */
2090 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2091 } else {
2092 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2093 req->r_data_offset || req->r_snapc);
2094 }
2095
2096 setup_request_data(req);
2097
2098 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2099 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
2100 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2101 ceph_encode_32(&p, req->r_flags);
2102
2103 /* reqid */
2104 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2105 memset(p, 0, sizeof(struct ceph_osd_reqid));
2106 p += sizeof(struct ceph_osd_reqid);
2107
2108 /* trace */
2109 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2110 p += sizeof(struct ceph_blkin_trace_info);
2111
2112 ceph_encode_32(&p, 0); /* client_inc, always 0 */
2113 ceph_encode_timespec64(p, &req->r_mtime);
2114 p += sizeof(struct ceph_timespec);
2115
2116 encode_oloc(&p, end, &req->r_t.target_oloc);
2117 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2118 req->r_t.target_oid.name_len);
2119
2120 /* ops, can imply data */
2121 ceph_encode_16(&p, req->r_num_ops);
2122 for (i = 0; i < req->r_num_ops; i++) {
2123 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2124 p += sizeof(struct ceph_osd_op);
2125 }
2126
2127 ceph_encode_64(&p, req->r_snapid); /* snapid */
2128 if (req->r_snapc) {
2129 ceph_encode_64(&p, req->r_snapc->seq);
2130 ceph_encode_32(&p, req->r_snapc->num_snaps);
2131 for (i = 0; i < req->r_snapc->num_snaps; i++)
2132 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2133 } else {
2134 ceph_encode_64(&p, 0); /* snap_seq */
2135 ceph_encode_32(&p, 0); /* snaps len */
2136 }
2137
2138 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
2139 BUG_ON(p > end - 8); /* space for features */
2140
2141 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2142 /* front_len is finalized in encode_request_finish() */
2143 msg->front.iov_len = p - msg->front.iov_base;
2144 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2145 msg->hdr.data_len = cpu_to_le32(data_len);
2146 /*
2147 * The header "data_off" is a hint to the receiver allowing it
2148 * to align received data into its buffers such that there's no
2149 * need to re-copy it before writing it to disk (direct I/O).
2150 */
2151 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
2152
2153 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2154 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2155}
2156
2157static void encode_request_finish(struct ceph_msg *msg)
2158{
2159 void *p = msg->front.iov_base;
2160 void *const partial_end = p + msg->front.iov_len;
2161 void *const end = p + msg->front_alloc_len;
2162
2163 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2164 /* luminous OSD -- encode features and be done */
2165 p = partial_end;
2166 ceph_encode_64(&p, msg->con->peer_features);
2167 } else {
2168 struct {
2169 char spgid[CEPH_ENCODING_START_BLK_LEN +
2170 CEPH_PGID_ENCODING_LEN + 1];
2171 __le32 hash;
2172 __le32 epoch;
2173 __le32 flags;
2174 char reqid[CEPH_ENCODING_START_BLK_LEN +
2175 sizeof(struct ceph_osd_reqid)];
2176 char trace[sizeof(struct ceph_blkin_trace_info)];
2177 __le32 client_inc;
2178 struct ceph_timespec mtime;
2179 } __packed head;
2180 struct ceph_pg pgid;
2181 void *oloc, *oid, *tail;
2182 int oloc_len, oid_len, tail_len;
2183 int len;
2184
2185 /*
2186 * Pre-luminous OSD -- reencode v8 into v4 using @head
2187 * as a temporary buffer. Encode the raw PG; the rest
2188 * is just a matter of moving oloc, oid and tail blobs
2189 * around.
2190 */
2191 memcpy(&head, p, sizeof(head));
2192 p += sizeof(head);
2193
2194 oloc = p;
2195 p += CEPH_ENCODING_START_BLK_LEN;
2196 pgid.pool = ceph_decode_64(&p);
2197 p += 4 + 4; /* preferred, key len */
2198 len = ceph_decode_32(&p);
2199 p += len; /* nspace */
2200 oloc_len = p - oloc;
2201
2202 oid = p;
2203 len = ceph_decode_32(&p);
2204 p += len;
2205 oid_len = p - oid;
2206
2207 tail = p;
2208 tail_len = partial_end - p;
2209
2210 p = msg->front.iov_base;
2211 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2212 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2213 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2214 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2215
2216 /* reassert_version */
2217 memset(p, 0, sizeof(struct ceph_eversion));
2218 p += sizeof(struct ceph_eversion);
2219
2220 BUG_ON(p >= oloc);
2221 memmove(p, oloc, oloc_len);
2222 p += oloc_len;
2223
2224 pgid.seed = le32_to_cpu(head.hash);
2225 encode_pgid(&p, &pgid); /* raw pg */
2226
2227 BUG_ON(p >= oid);
2228 memmove(p, oid, oid_len);
2229 p += oid_len;
2230
2231 /* tail -- ops, snapid, snapc, retry_attempt */
2232 BUG_ON(p >= tail);
2233 memmove(p, tail, tail_len);
2234 p += tail_len;
2235
2236 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2237 }
2238
2239 BUG_ON(p > end);
2240 msg->front.iov_len = p - msg->front.iov_base;
2241 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2242
2243 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2244 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2245 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2246 le16_to_cpu(msg->hdr.version));
2247}
2248
2249/*
2250 * @req has to be assigned a tid and registered.
2251 */
2252static void send_request(struct ceph_osd_request *req)
2253{
2254 struct ceph_osd *osd = req->r_osd;
2255
2256 verify_osd_locked(osd);
2257 WARN_ON(osd->o_osd != req->r_t.osd);
2258
2259 /* backoff? */
2260 if (should_plug_request(req))
2261 return;
2262
2263 /*
2264 * We may have a previously queued request message hanging
2265 * around. Cancel it to avoid corrupting the msgr.
2266 */
2267 if (req->r_sent)
2268 ceph_msg_revoke(req->r_request);
2269
2270 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2271 if (req->r_attempts)
2272 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2273 else
2274 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2275
2276 encode_request_partial(req, req->r_request);
2277
2278 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2279 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2280 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2281 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2282 req->r_attempts);
2283
2284 req->r_t.paused = false;
2285 req->r_stamp = jiffies;
2286 req->r_attempts++;
2287
2288 req->r_sent = osd->o_incarnation;
2289 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2290 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
2291}
2292
2293static void maybe_request_map(struct ceph_osd_client *osdc)
2294{
2295 bool continuous = false;
2296
2297 verify_osdc_locked(osdc);
2298 WARN_ON(!osdc->osdmap->epoch);
2299
2300 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2301 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2302 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2303 dout("%s osdc %p continuous\n", __func__, osdc);
2304 continuous = true;
2305 } else {
2306 dout("%s osdc %p onetime\n", __func__, osdc);
2307 }
2308
2309 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2310 osdc->osdmap->epoch + 1, continuous))
2311 ceph_monc_renew_subs(&osdc->client->monc);
2312}
2313
2314static void complete_request(struct ceph_osd_request *req, int err);
2315static void send_map_check(struct ceph_osd_request *req);
2316
2317static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2318{
2319 struct ceph_osd_client *osdc = req->r_osdc;
2320 struct ceph_osd *osd;
2321 enum calc_target_result ct_res;
2322 int err = 0;
2323 bool need_send = false;
2324 bool promoted = false;
2325
2326 WARN_ON(req->r_tid);
2327 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2328
2329again:
2330 ct_res = calc_target(osdc, &req->r_t, false);
2331 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2332 goto promote;
2333
2334 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2335 if (IS_ERR(osd)) {
2336 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2337 goto promote;
2338 }
2339
2340 if (osdc->abort_err) {
2341 dout("req %p abort_err %d\n", req, osdc->abort_err);
2342 err = osdc->abort_err;
2343 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2344 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2345 osdc->epoch_barrier);
2346 req->r_t.paused = true;
2347 maybe_request_map(osdc);
2348 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2349 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2350 dout("req %p pausewr\n", req);
2351 req->r_t.paused = true;
2352 maybe_request_map(osdc);
2353 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2354 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2355 dout("req %p pauserd\n", req);
2356 req->r_t.paused = true;
2357 maybe_request_map(osdc);
2358 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2359 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2360 CEPH_OSD_FLAG_FULL_FORCE)) &&
2361 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2362 pool_full(osdc, req->r_t.base_oloc.pool))) {
2363 dout("req %p full/pool_full\n", req);
2364 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
2365 err = -ENOSPC;
2366 } else {
2367 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL))
2368 pr_warn_ratelimited("cluster is full (osdmap FULL)\n");
2369 else
2370 pr_warn_ratelimited("pool %lld is full or reached quota\n",
2371 req->r_t.base_oloc.pool);
2372 req->r_t.paused = true;
2373 maybe_request_map(osdc);
2374 }
2375 } else if (!osd_homeless(osd)) {
2376 need_send = true;
2377 } else {
2378 maybe_request_map(osdc);
2379 }
2380
2381 mutex_lock(&osd->lock);
2382 /*
2383 * Assign the tid atomically with send_request() to protect
2384 * multiple writes to the same object from racing with each
2385 * other, resulting in out of order ops on the OSDs.
2386 */
2387 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2388 link_request(osd, req);
2389 if (need_send)
2390 send_request(req);
2391 else if (err)
2392 complete_request(req, err);
2393 mutex_unlock(&osd->lock);
2394
2395 if (!err && ct_res == CALC_TARGET_POOL_DNE)
2396 send_map_check(req);
2397
2398 if (promoted)
2399 downgrade_write(&osdc->lock);
2400 return;
2401
2402promote:
2403 up_read(&osdc->lock);
2404 down_write(&osdc->lock);
2405 wrlocked = true;
2406 promoted = true;
2407 goto again;
2408}
2409
2410static void account_request(struct ceph_osd_request *req)
2411{
2412 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
2413 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2414
2415 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2416 atomic_inc(&req->r_osdc->num_requests);
2417
2418 req->r_start_stamp = jiffies;
2419 req->r_start_latency = ktime_get();
2420}
2421
2422static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2423{
2424 ceph_osdc_get_request(req);
2425 account_request(req);
2426 __submit_request(req, wrlocked);
2427}
2428
2429static void finish_request(struct ceph_osd_request *req)
2430{
2431 struct ceph_osd_client *osdc = req->r_osdc;
2432
2433 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2434 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2435
2436 req->r_end_latency = ktime_get();
2437
2438 if (req->r_osd)
2439 unlink_request(req->r_osd, req);
2440 atomic_dec(&osdc->num_requests);
2441
2442 /*
2443 * If an OSD has failed or returned and a request has been sent
2444 * twice, it's possible to get a reply and end up here while the
2445 * request message is queued for delivery. We will ignore the
2446 * reply, so not a big deal, but better to try and catch it.
2447 */
2448 ceph_msg_revoke(req->r_request);
2449 ceph_msg_revoke_incoming(req->r_reply);
2450}
2451
2452static void __complete_request(struct ceph_osd_request *req)
2453{
2454 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
2455 req->r_tid, req->r_callback, req->r_result);
2456
2457 if (req->r_callback)
2458 req->r_callback(req);
2459 complete_all(&req->r_completion);
2460 ceph_osdc_put_request(req);
2461}
2462
2463static void complete_request_workfn(struct work_struct *work)
2464{
2465 struct ceph_osd_request *req =
2466 container_of(work, struct ceph_osd_request, r_complete_work);
2467
2468 __complete_request(req);
2469}
2470
2471/*
2472 * This is open-coded in handle_reply().
2473 */
2474static void complete_request(struct ceph_osd_request *req, int err)
2475{
2476 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2477
2478 req->r_result = err;
2479 finish_request(req);
2480
2481 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2482 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
2483}
2484
2485static void cancel_map_check(struct ceph_osd_request *req)
2486{
2487 struct ceph_osd_client *osdc = req->r_osdc;
2488 struct ceph_osd_request *lookup_req;
2489
2490 verify_osdc_wrlocked(osdc);
2491
2492 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2493 if (!lookup_req)
2494 return;
2495
2496 WARN_ON(lookup_req != req);
2497 erase_request_mc(&osdc->map_checks, req);
2498 ceph_osdc_put_request(req);
2499}
2500
2501static void cancel_request(struct ceph_osd_request *req)
2502{
2503 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2504
2505 cancel_map_check(req);
2506 finish_request(req);
2507 complete_all(&req->r_completion);
2508 ceph_osdc_put_request(req);
2509}
2510
2511static void abort_request(struct ceph_osd_request *req, int err)
2512{
2513 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2514
2515 cancel_map_check(req);
2516 complete_request(req, err);
2517}
2518
2519static int abort_fn(struct ceph_osd_request *req, void *arg)
2520{
2521 int err = *(int *)arg;
2522
2523 abort_request(req, err);
2524 return 0; /* continue iteration */
2525}
2526
2527/*
2528 * Abort all in-flight requests with @err and arrange for all future
2529 * requests to be failed immediately.
2530 */
2531void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2532{
2533 dout("%s osdc %p err %d\n", __func__, osdc, err);
2534 down_write(&osdc->lock);
2535 for_each_request(osdc, abort_fn, &err);
2536 osdc->abort_err = err;
2537 up_write(&osdc->lock);
2538}
2539EXPORT_SYMBOL(ceph_osdc_abort_requests);
2540
2541void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc)
2542{
2543 down_write(&osdc->lock);
2544 osdc->abort_err = 0;
2545 up_write(&osdc->lock);
2546}
2547EXPORT_SYMBOL(ceph_osdc_clear_abort_err);
2548
2549static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2550{
2551 if (likely(eb > osdc->epoch_barrier)) {
2552 dout("updating epoch_barrier from %u to %u\n",
2553 osdc->epoch_barrier, eb);
2554 osdc->epoch_barrier = eb;
2555 /* Request map if we're not to the barrier yet */
2556 if (eb > osdc->osdmap->epoch)
2557 maybe_request_map(osdc);
2558 }
2559}
2560
2561void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2562{
2563 down_read(&osdc->lock);
2564 if (unlikely(eb > osdc->epoch_barrier)) {
2565 up_read(&osdc->lock);
2566 down_write(&osdc->lock);
2567 update_epoch_barrier(osdc, eb);
2568 up_write(&osdc->lock);
2569 } else {
2570 up_read(&osdc->lock);
2571 }
2572}
2573EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2574
2575/*
2576 * We can end up releasing caps as a result of abort_request().
2577 * In that case, we probably want to ensure that the cap release message
2578 * has an updated epoch barrier in it, so set the epoch barrier prior to
2579 * aborting the first request.
2580 */
2581static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2582{
2583 struct ceph_osd_client *osdc = req->r_osdc;
2584 bool *victims = arg;
2585
2586 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2587 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2588 pool_full(osdc, req->r_t.base_oloc.pool))) {
2589 if (!*victims) {
2590 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2591 *victims = true;
2592 }
2593 abort_request(req, -ENOSPC);
2594 }
2595
2596 return 0; /* continue iteration */
2597}
2598
2599/*
2600 * Drop all pending requests that are stalled waiting on a full condition to
2601 * clear, and complete them with ENOSPC as the return code. Set the
2602 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2603 * cancelled.
2604 */
2605static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2606{
2607 bool victims = false;
2608
2609 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
2610 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
2611 for_each_request(osdc, abort_on_full_fn, &victims);
2612}
2613
2614static void check_pool_dne(struct ceph_osd_request *req)
2615{
2616 struct ceph_osd_client *osdc = req->r_osdc;
2617 struct ceph_osdmap *map = osdc->osdmap;
2618
2619 verify_osdc_wrlocked(osdc);
2620 WARN_ON(!map->epoch);
2621
2622 if (req->r_attempts) {
2623 /*
2624 * We sent a request earlier, which means that
2625 * previously the pool existed, and now it does not
2626 * (i.e., it was deleted).
2627 */
2628 req->r_map_dne_bound = map->epoch;
2629 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2630 req->r_tid);
2631 } else {
2632 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2633 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2634 }
2635
2636 if (req->r_map_dne_bound) {
2637 if (map->epoch >= req->r_map_dne_bound) {
2638 /* we had a new enough map */
2639 pr_info_ratelimited("tid %llu pool does not exist\n",
2640 req->r_tid);
2641 complete_request(req, -ENOENT);
2642 }
2643 } else {
2644 send_map_check(req);
2645 }
2646}
2647
2648static void map_check_cb(struct ceph_mon_generic_request *greq)
2649{
2650 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2651 struct ceph_osd_request *req;
2652 u64 tid = greq->private_data;
2653
2654 WARN_ON(greq->result || !greq->u.newest);
2655
2656 down_write(&osdc->lock);
2657 req = lookup_request_mc(&osdc->map_checks, tid);
2658 if (!req) {
2659 dout("%s tid %llu dne\n", __func__, tid);
2660 goto out_unlock;
2661 }
2662
2663 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2664 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2665 if (!req->r_map_dne_bound)
2666 req->r_map_dne_bound = greq->u.newest;
2667 erase_request_mc(&osdc->map_checks, req);
2668 check_pool_dne(req);
2669
2670 ceph_osdc_put_request(req);
2671out_unlock:
2672 up_write(&osdc->lock);
2673}
2674
2675static void send_map_check(struct ceph_osd_request *req)
2676{
2677 struct ceph_osd_client *osdc = req->r_osdc;
2678 struct ceph_osd_request *lookup_req;
2679 int ret;
2680
2681 verify_osdc_wrlocked(osdc);
2682
2683 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2684 if (lookup_req) {
2685 WARN_ON(lookup_req != req);
2686 return;
2687 }
2688
2689 ceph_osdc_get_request(req);
2690 insert_request_mc(&osdc->map_checks, req);
2691 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2692 map_check_cb, req->r_tid);
2693 WARN_ON(ret);
2694}
2695
2696/*
2697 * lingering requests, watch/notify v2 infrastructure
2698 */
2699static void linger_release(struct kref *kref)
2700{
2701 struct ceph_osd_linger_request *lreq =
2702 container_of(kref, struct ceph_osd_linger_request, kref);
2703
2704 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2705 lreq->reg_req, lreq->ping_req);
2706 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2707 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
2708 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2709 WARN_ON(!list_empty(&lreq->scan_item));
2710 WARN_ON(!list_empty(&lreq->pending_lworks));
2711 WARN_ON(lreq->osd);
2712
2713 if (lreq->request_pl)
2714 ceph_pagelist_release(lreq->request_pl);
2715 if (lreq->notify_id_pages)
2716 ceph_release_page_vector(lreq->notify_id_pages, 1);
2717
2718 ceph_osdc_put_request(lreq->reg_req);
2719 ceph_osdc_put_request(lreq->ping_req);
2720 target_destroy(&lreq->t);
2721 kfree(lreq);
2722}
2723
2724static void linger_put(struct ceph_osd_linger_request *lreq)
2725{
2726 if (lreq)
2727 kref_put(&lreq->kref, linger_release);
2728}
2729
2730static struct ceph_osd_linger_request *
2731linger_get(struct ceph_osd_linger_request *lreq)
2732{
2733 kref_get(&lreq->kref);
2734 return lreq;
2735}
2736
2737static struct ceph_osd_linger_request *
2738linger_alloc(struct ceph_osd_client *osdc)
2739{
2740 struct ceph_osd_linger_request *lreq;
2741
2742 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2743 if (!lreq)
2744 return NULL;
2745
2746 kref_init(&lreq->kref);
2747 mutex_init(&lreq->lock);
2748 RB_CLEAR_NODE(&lreq->node);
2749 RB_CLEAR_NODE(&lreq->osdc_node);
2750 RB_CLEAR_NODE(&lreq->mc_node);
2751 INIT_LIST_HEAD(&lreq->scan_item);
2752 INIT_LIST_HEAD(&lreq->pending_lworks);
2753 init_completion(&lreq->reg_commit_wait);
2754 init_completion(&lreq->notify_finish_wait);
2755
2756 lreq->osdc = osdc;
2757 target_init(&lreq->t);
2758
2759 dout("%s lreq %p\n", __func__, lreq);
2760 return lreq;
2761}
2762
2763DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2764DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
2765DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2766
2767/*
2768 * Create linger request <-> OSD session relation.
2769 *
2770 * @lreq has to be registered, @osd may be homeless.
2771 */
2772static void link_linger(struct ceph_osd *osd,
2773 struct ceph_osd_linger_request *lreq)
2774{
2775 verify_osd_locked(osd);
2776 WARN_ON(!lreq->linger_id || lreq->osd);
2777 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2778 osd->o_osd, lreq, lreq->linger_id);
2779
2780 if (!osd_homeless(osd))
2781 __remove_osd_from_lru(osd);
2782 else
2783 atomic_inc(&osd->o_osdc->num_homeless);
2784
2785 get_osd(osd);
2786 insert_linger(&osd->o_linger_requests, lreq);
2787 lreq->osd = osd;
2788}
2789
2790static void unlink_linger(struct ceph_osd *osd,
2791 struct ceph_osd_linger_request *lreq)
2792{
2793 verify_osd_locked(osd);
2794 WARN_ON(lreq->osd != osd);
2795 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2796 osd->o_osd, lreq, lreq->linger_id);
2797
2798 lreq->osd = NULL;
2799 erase_linger(&osd->o_linger_requests, lreq);
2800 put_osd(osd);
2801
2802 if (!osd_homeless(osd))
2803 maybe_move_osd_to_lru(osd);
2804 else
2805 atomic_dec(&osd->o_osdc->num_homeless);
2806}
2807
2808static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2809{
2810 verify_osdc_locked(lreq->osdc);
2811
2812 return !RB_EMPTY_NODE(&lreq->osdc_node);
2813}
2814
2815static bool linger_registered(struct ceph_osd_linger_request *lreq)
2816{
2817 struct ceph_osd_client *osdc = lreq->osdc;
2818 bool registered;
2819
2820 down_read(&osdc->lock);
2821 registered = __linger_registered(lreq);
2822 up_read(&osdc->lock);
2823
2824 return registered;
2825}
2826
2827static void linger_register(struct ceph_osd_linger_request *lreq)
2828{
2829 struct ceph_osd_client *osdc = lreq->osdc;
2830
2831 verify_osdc_wrlocked(osdc);
2832 WARN_ON(lreq->linger_id);
2833
2834 linger_get(lreq);
2835 lreq->linger_id = ++osdc->last_linger_id;
2836 insert_linger_osdc(&osdc->linger_requests, lreq);
2837}
2838
2839static void linger_unregister(struct ceph_osd_linger_request *lreq)
2840{
2841 struct ceph_osd_client *osdc = lreq->osdc;
2842
2843 verify_osdc_wrlocked(osdc);
2844
2845 erase_linger_osdc(&osdc->linger_requests, lreq);
2846 linger_put(lreq);
2847}
2848
2849static void cancel_linger_request(struct ceph_osd_request *req)
2850{
2851 struct ceph_osd_linger_request *lreq = req->r_priv;
2852
2853 WARN_ON(!req->r_linger);
2854 cancel_request(req);
2855 linger_put(lreq);
2856}
2857
2858struct linger_work {
2859 struct work_struct work;
2860 struct ceph_osd_linger_request *lreq;
2861 struct list_head pending_item;
2862 unsigned long queued_stamp;
2863
2864 union {
2865 struct {
2866 u64 notify_id;
2867 u64 notifier_id;
2868 void *payload; /* points into @msg front */
2869 size_t payload_len;
2870
2871 struct ceph_msg *msg; /* for ceph_msg_put() */
2872 } notify;
2873 struct {
2874 int err;
2875 } error;
2876 };
2877};
2878
2879static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2880 work_func_t workfn)
2881{
2882 struct linger_work *lwork;
2883
2884 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2885 if (!lwork)
2886 return NULL;
2887
2888 INIT_WORK(&lwork->work, workfn);
2889 INIT_LIST_HEAD(&lwork->pending_item);
2890 lwork->lreq = linger_get(lreq);
2891
2892 return lwork;
2893}
2894
2895static void lwork_free(struct linger_work *lwork)
2896{
2897 struct ceph_osd_linger_request *lreq = lwork->lreq;
2898
2899 mutex_lock(&lreq->lock);
2900 list_del(&lwork->pending_item);
2901 mutex_unlock(&lreq->lock);
2902
2903 linger_put(lreq);
2904 kfree(lwork);
2905}
2906
2907static void lwork_queue(struct linger_work *lwork)
2908{
2909 struct ceph_osd_linger_request *lreq = lwork->lreq;
2910 struct ceph_osd_client *osdc = lreq->osdc;
2911
2912 verify_lreq_locked(lreq);
2913 WARN_ON(!list_empty(&lwork->pending_item));
2914
2915 lwork->queued_stamp = jiffies;
2916 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2917 queue_work(osdc->notify_wq, &lwork->work);
2918}
2919
2920static void do_watch_notify(struct work_struct *w)
2921{
2922 struct linger_work *lwork = container_of(w, struct linger_work, work);
2923 struct ceph_osd_linger_request *lreq = lwork->lreq;
2924
2925 if (!linger_registered(lreq)) {
2926 dout("%s lreq %p not registered\n", __func__, lreq);
2927 goto out;
2928 }
2929
2930 WARN_ON(!lreq->is_watch);
2931 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2932 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2933 lwork->notify.payload_len);
2934 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2935 lwork->notify.notifier_id, lwork->notify.payload,
2936 lwork->notify.payload_len);
2937
2938out:
2939 ceph_msg_put(lwork->notify.msg);
2940 lwork_free(lwork);
2941}
2942
2943static void do_watch_error(struct work_struct *w)
2944{
2945 struct linger_work *lwork = container_of(w, struct linger_work, work);
2946 struct ceph_osd_linger_request *lreq = lwork->lreq;
2947
2948 if (!linger_registered(lreq)) {
2949 dout("%s lreq %p not registered\n", __func__, lreq);
2950 goto out;
2951 }
2952
2953 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2954 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2955
2956out:
2957 lwork_free(lwork);
2958}
2959
2960static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2961{
2962 struct linger_work *lwork;
2963
2964 lwork = lwork_alloc(lreq, do_watch_error);
2965 if (!lwork) {
2966 pr_err("failed to allocate error-lwork\n");
2967 return;
2968 }
2969
2970 lwork->error.err = lreq->last_error;
2971 lwork_queue(lwork);
2972}
2973
2974static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2975 int result)
2976{
2977 if (!completion_done(&lreq->reg_commit_wait)) {
2978 lreq->reg_commit_error = (result <= 0 ? result : 0);
2979 complete_all(&lreq->reg_commit_wait);
2980 }
2981}
2982
2983static void linger_commit_cb(struct ceph_osd_request *req)
2984{
2985 struct ceph_osd_linger_request *lreq = req->r_priv;
2986
2987 mutex_lock(&lreq->lock);
2988 if (req != lreq->reg_req) {
2989 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
2990 __func__, lreq, lreq->linger_id, req, lreq->reg_req);
2991 goto out;
2992 }
2993
2994 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2995 lreq->linger_id, req->r_result);
2996 linger_reg_commit_complete(lreq, req->r_result);
2997 lreq->committed = true;
2998
2999 if (!lreq->is_watch) {
3000 struct ceph_osd_data *osd_data =
3001 osd_req_op_data(req, 0, notify, response_data);
3002 void *p = page_address(osd_data->pages[0]);
3003
3004 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
3005 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
3006
3007 /* make note of the notify_id */
3008 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
3009 lreq->notify_id = ceph_decode_64(&p);
3010 dout("lreq %p notify_id %llu\n", lreq,
3011 lreq->notify_id);
3012 } else {
3013 dout("lreq %p no notify_id\n", lreq);
3014 }
3015 }
3016
3017out:
3018 mutex_unlock(&lreq->lock);
3019 linger_put(lreq);
3020}
3021
3022static int normalize_watch_error(int err)
3023{
3024 /*
3025 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
3026 * notification and a failure to reconnect because we raced with
3027 * the delete appear the same to the user.
3028 */
3029 if (err == -ENOENT)
3030 err = -ENOTCONN;
3031
3032 return err;
3033}
3034
3035static void linger_reconnect_cb(struct ceph_osd_request *req)
3036{
3037 struct ceph_osd_linger_request *lreq = req->r_priv;
3038
3039 mutex_lock(&lreq->lock);
3040 if (req != lreq->reg_req) {
3041 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
3042 __func__, lreq, lreq->linger_id, req, lreq->reg_req);
3043 goto out;
3044 }
3045
3046 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
3047 lreq, lreq->linger_id, req->r_result, lreq->last_error);
3048 if (req->r_result < 0) {
3049 if (!lreq->last_error) {
3050 lreq->last_error = normalize_watch_error(req->r_result);
3051 queue_watch_error(lreq);
3052 }
3053 }
3054
3055out:
3056 mutex_unlock(&lreq->lock);
3057 linger_put(lreq);
3058}
3059
3060static void send_linger(struct ceph_osd_linger_request *lreq)
3061{
3062 struct ceph_osd_client *osdc = lreq->osdc;
3063 struct ceph_osd_request *req;
3064 int ret;
3065
3066 verify_osdc_wrlocked(osdc);
3067 mutex_lock(&lreq->lock);
3068 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3069
3070 if (lreq->reg_req) {
3071 if (lreq->reg_req->r_osd)
3072 cancel_linger_request(lreq->reg_req);
3073 ceph_osdc_put_request(lreq->reg_req);
3074 }
3075
3076 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO);
3077 BUG_ON(!req);
3078
3079 target_copy(&req->r_t, &lreq->t);
3080 req->r_mtime = lreq->mtime;
3081
3082 if (lreq->is_watch && lreq->committed) {
3083 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_RECONNECT,
3084 lreq->linger_id, ++lreq->register_gen);
3085 dout("lreq %p reconnect register_gen %u\n", lreq,
3086 req->r_ops[0].watch.gen);
3087 req->r_callback = linger_reconnect_cb;
3088 } else {
3089 if (lreq->is_watch) {
3090 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_WATCH,
3091 lreq->linger_id, 0);
3092 } else {
3093 lreq->notify_id = 0;
3094
3095 refcount_inc(&lreq->request_pl->refcnt);
3096 osd_req_op_notify_init(req, 0, lreq->linger_id,
3097 lreq->request_pl);
3098 ceph_osd_data_pages_init(
3099 osd_req_op_data(req, 0, notify, response_data),
3100 lreq->notify_id_pages, PAGE_SIZE, 0, false, false);
3101 }
3102 dout("lreq %p register\n", lreq);
3103 req->r_callback = linger_commit_cb;
3104 }
3105
3106 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3107 BUG_ON(ret);
3108
3109 req->r_priv = linger_get(lreq);
3110 req->r_linger = true;
3111 lreq->reg_req = req;
3112 mutex_unlock(&lreq->lock);
3113
3114 submit_request(req, true);
3115}
3116
3117static void linger_ping_cb(struct ceph_osd_request *req)
3118{
3119 struct ceph_osd_linger_request *lreq = req->r_priv;
3120
3121 mutex_lock(&lreq->lock);
3122 if (req != lreq->ping_req) {
3123 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
3124 __func__, lreq, lreq->linger_id, req, lreq->ping_req);
3125 goto out;
3126 }
3127
3128 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3129 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3130 lreq->last_error);
3131 if (lreq->register_gen == req->r_ops[0].watch.gen) {
3132 if (!req->r_result) {
3133 lreq->watch_valid_thru = lreq->ping_sent;
3134 } else if (!lreq->last_error) {
3135 lreq->last_error = normalize_watch_error(req->r_result);
3136 queue_watch_error(lreq);
3137 }
3138 } else {
3139 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3140 lreq->register_gen, req->r_ops[0].watch.gen);
3141 }
3142
3143out:
3144 mutex_unlock(&lreq->lock);
3145 linger_put(lreq);
3146}
3147
3148static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3149{
3150 struct ceph_osd_client *osdc = lreq->osdc;
3151 struct ceph_osd_request *req;
3152 int ret;
3153
3154 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
3155 dout("%s PAUSERD\n", __func__);
3156 return;
3157 }
3158
3159 lreq->ping_sent = jiffies;
3160 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3161 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3162 lreq->register_gen);
3163
3164 if (lreq->ping_req) {
3165 if (lreq->ping_req->r_osd)
3166 cancel_linger_request(lreq->ping_req);
3167 ceph_osdc_put_request(lreq->ping_req);
3168 }
3169
3170 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO);
3171 BUG_ON(!req);
3172
3173 target_copy(&req->r_t, &lreq->t);
3174 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_PING, lreq->linger_id,
3175 lreq->register_gen);
3176 req->r_callback = linger_ping_cb;
3177
3178 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3179 BUG_ON(ret);
3180
3181 req->r_priv = linger_get(lreq);
3182 req->r_linger = true;
3183 lreq->ping_req = req;
3184
3185 ceph_osdc_get_request(req);
3186 account_request(req);
3187 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3188 link_request(lreq->osd, req);
3189 send_request(req);
3190}
3191
3192static void linger_submit(struct ceph_osd_linger_request *lreq)
3193{
3194 struct ceph_osd_client *osdc = lreq->osdc;
3195 struct ceph_osd *osd;
3196
3197 down_write(&osdc->lock);
3198 linger_register(lreq);
3199
3200 calc_target(osdc, &lreq->t, false);
3201 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3202 link_linger(osd, lreq);
3203
3204 send_linger(lreq);
3205 up_write(&osdc->lock);
3206}
3207
3208static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3209{
3210 struct ceph_osd_client *osdc = lreq->osdc;
3211 struct ceph_osd_linger_request *lookup_lreq;
3212
3213 verify_osdc_wrlocked(osdc);
3214
3215 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3216 lreq->linger_id);
3217 if (!lookup_lreq)
3218 return;
3219
3220 WARN_ON(lookup_lreq != lreq);
3221 erase_linger_mc(&osdc->linger_map_checks, lreq);
3222 linger_put(lreq);
3223}
3224
3225/*
3226 * @lreq has to be both registered and linked.
3227 */
3228static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3229{
3230 if (lreq->ping_req && lreq->ping_req->r_osd)
3231 cancel_linger_request(lreq->ping_req);
3232 if (lreq->reg_req && lreq->reg_req->r_osd)
3233 cancel_linger_request(lreq->reg_req);
3234 cancel_linger_map_check(lreq);
3235 unlink_linger(lreq->osd, lreq);
3236 linger_unregister(lreq);
3237}
3238
3239static void linger_cancel(struct ceph_osd_linger_request *lreq)
3240{
3241 struct ceph_osd_client *osdc = lreq->osdc;
3242
3243 down_write(&osdc->lock);
3244 if (__linger_registered(lreq))
3245 __linger_cancel(lreq);
3246 up_write(&osdc->lock);
3247}
3248
3249static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3250
3251static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3252{
3253 struct ceph_osd_client *osdc = lreq->osdc;
3254 struct ceph_osdmap *map = osdc->osdmap;
3255
3256 verify_osdc_wrlocked(osdc);
3257 WARN_ON(!map->epoch);
3258
3259 if (lreq->register_gen) {
3260 lreq->map_dne_bound = map->epoch;
3261 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3262 lreq, lreq->linger_id);
3263 } else {
3264 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3265 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3266 map->epoch);
3267 }
3268
3269 if (lreq->map_dne_bound) {
3270 if (map->epoch >= lreq->map_dne_bound) {
3271 /* we had a new enough map */
3272 pr_info("linger_id %llu pool does not exist\n",
3273 lreq->linger_id);
3274 linger_reg_commit_complete(lreq, -ENOENT);
3275 __linger_cancel(lreq);
3276 }
3277 } else {
3278 send_linger_map_check(lreq);
3279 }
3280}
3281
3282static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3283{
3284 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3285 struct ceph_osd_linger_request *lreq;
3286 u64 linger_id = greq->private_data;
3287
3288 WARN_ON(greq->result || !greq->u.newest);
3289
3290 down_write(&osdc->lock);
3291 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3292 if (!lreq) {
3293 dout("%s linger_id %llu dne\n", __func__, linger_id);
3294 goto out_unlock;
3295 }
3296
3297 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3298 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3299 greq->u.newest);
3300 if (!lreq->map_dne_bound)
3301 lreq->map_dne_bound = greq->u.newest;
3302 erase_linger_mc(&osdc->linger_map_checks, lreq);
3303 check_linger_pool_dne(lreq);
3304
3305 linger_put(lreq);
3306out_unlock:
3307 up_write(&osdc->lock);
3308}
3309
3310static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3311{
3312 struct ceph_osd_client *osdc = lreq->osdc;
3313 struct ceph_osd_linger_request *lookup_lreq;
3314 int ret;
3315
3316 verify_osdc_wrlocked(osdc);
3317
3318 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3319 lreq->linger_id);
3320 if (lookup_lreq) {
3321 WARN_ON(lookup_lreq != lreq);
3322 return;
3323 }
3324
3325 linger_get(lreq);
3326 insert_linger_mc(&osdc->linger_map_checks, lreq);
3327 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3328 linger_map_check_cb, lreq->linger_id);
3329 WARN_ON(ret);
3330}
3331
3332static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3333{
3334 int ret;
3335
3336 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3337 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3338 return ret ?: lreq->reg_commit_error;
3339}
3340
3341static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3342{
3343 int ret;
3344
3345 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3346 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3347 return ret ?: lreq->notify_finish_error;
3348}
3349
3350/*
3351 * Timeout callback, called every N seconds. When 1 or more OSD
3352 * requests has been active for more than N seconds, we send a keepalive
3353 * (tag + timestamp) to its OSD to ensure any communications channel
3354 * reset is detected.
3355 */
3356static void handle_timeout(struct work_struct *work)
3357{
3358 struct ceph_osd_client *osdc =
3359 container_of(work, struct ceph_osd_client, timeout_work.work);
3360 struct ceph_options *opts = osdc->client->options;
3361 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3362 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3363 LIST_HEAD(slow_osds);
3364 struct rb_node *n, *p;
3365
3366 dout("%s osdc %p\n", __func__, osdc);
3367 down_write(&osdc->lock);
3368
3369 /*
3370 * ping osds that are a bit slow. this ensures that if there
3371 * is a break in the TCP connection we will notice, and reopen
3372 * a connection with that osd (from the fault callback).
3373 */
3374 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3375 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3376 bool found = false;
3377
3378 for (p = rb_first(&osd->o_requests); p; ) {
3379 struct ceph_osd_request *req =
3380 rb_entry(p, struct ceph_osd_request, r_node);
3381
3382 p = rb_next(p); /* abort_request() */
3383
3384 if (time_before(req->r_stamp, cutoff)) {
3385 dout(" req %p tid %llu on osd%d is laggy\n",
3386 req, req->r_tid, osd->o_osd);
3387 found = true;
3388 }
3389 if (opts->osd_request_timeout &&
3390 time_before(req->r_start_stamp, expiry_cutoff)) {
3391 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3392 req->r_tid, osd->o_osd);
3393 abort_request(req, -ETIMEDOUT);
3394 }
3395 }
3396 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3397 struct ceph_osd_linger_request *lreq =
3398 rb_entry(p, struct ceph_osd_linger_request, node);
3399
3400 dout(" lreq %p linger_id %llu is served by osd%d\n",
3401 lreq, lreq->linger_id, osd->o_osd);
3402 found = true;
3403
3404 mutex_lock(&lreq->lock);
3405 if (lreq->is_watch && lreq->committed && !lreq->last_error)
3406 send_linger_ping(lreq);
3407 mutex_unlock(&lreq->lock);
3408 }
3409
3410 if (found)
3411 list_move_tail(&osd->o_keepalive_item, &slow_osds);
3412 }
3413
3414 if (opts->osd_request_timeout) {
3415 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3416 struct ceph_osd_request *req =
3417 rb_entry(p, struct ceph_osd_request, r_node);
3418
3419 p = rb_next(p); /* abort_request() */
3420
3421 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3422 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3423 req->r_tid, osdc->homeless_osd.o_osd);
3424 abort_request(req, -ETIMEDOUT);
3425 }
3426 }
3427 }
3428
3429 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3430 maybe_request_map(osdc);
3431
3432 while (!list_empty(&slow_osds)) {
3433 struct ceph_osd *osd = list_first_entry(&slow_osds,
3434 struct ceph_osd,
3435 o_keepalive_item);
3436 list_del_init(&osd->o_keepalive_item);
3437 ceph_con_keepalive(&osd->o_con);
3438 }
3439
3440 up_write(&osdc->lock);
3441 schedule_delayed_work(&osdc->timeout_work,
3442 osdc->client->options->osd_keepalive_timeout);
3443}
3444
3445static void handle_osds_timeout(struct work_struct *work)
3446{
3447 struct ceph_osd_client *osdc =
3448 container_of(work, struct ceph_osd_client,
3449 osds_timeout_work.work);
3450 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3451 struct ceph_osd *osd, *nosd;
3452
3453 dout("%s osdc %p\n", __func__, osdc);
3454 down_write(&osdc->lock);
3455 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3456 if (time_before(jiffies, osd->lru_ttl))
3457 break;
3458
3459 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3460 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3461 close_osd(osd);
3462 }
3463
3464 up_write(&osdc->lock);
3465 schedule_delayed_work(&osdc->osds_timeout_work,
3466 round_jiffies_relative(delay));
3467}
3468
3469static int ceph_oloc_decode(void **p, void *end,
3470 struct ceph_object_locator *oloc)
3471{
3472 u8 struct_v, struct_cv;
3473 u32 len;
3474 void *struct_end;
3475 int ret = 0;
3476
3477 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3478 struct_v = ceph_decode_8(p);
3479 struct_cv = ceph_decode_8(p);
3480 if (struct_v < 3) {
3481 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3482 struct_v, struct_cv);
3483 goto e_inval;
3484 }
3485 if (struct_cv > 6) {
3486 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3487 struct_v, struct_cv);
3488 goto e_inval;
3489 }
3490 len = ceph_decode_32(p);
3491 ceph_decode_need(p, end, len, e_inval);
3492 struct_end = *p + len;
3493
3494 oloc->pool = ceph_decode_64(p);
3495 *p += 4; /* skip preferred */
3496
3497 len = ceph_decode_32(p);
3498 if (len > 0) {
3499 pr_warn("ceph_object_locator::key is set\n");
3500 goto e_inval;
3501 }
3502
3503 if (struct_v >= 5) {
3504 bool changed = false;
3505
3506 len = ceph_decode_32(p);
3507 if (len > 0) {
3508 ceph_decode_need(p, end, len, e_inval);
3509 if (!oloc->pool_ns ||
3510 ceph_compare_string(oloc->pool_ns, *p, len))
3511 changed = true;
3512 *p += len;
3513 } else {
3514 if (oloc->pool_ns)
3515 changed = true;
3516 }
3517 if (changed) {
3518 /* redirect changes namespace */
3519 pr_warn("ceph_object_locator::nspace is changed\n");
3520 goto e_inval;
3521 }
3522 }
3523
3524 if (struct_v >= 6) {
3525 s64 hash = ceph_decode_64(p);
3526 if (hash != -1) {
3527 pr_warn("ceph_object_locator::hash is set\n");
3528 goto e_inval;
3529 }
3530 }
3531
3532 /* skip the rest */
3533 *p = struct_end;
3534out:
3535 return ret;
3536
3537e_inval:
3538 ret = -EINVAL;
3539 goto out;
3540}
3541
3542static int ceph_redirect_decode(void **p, void *end,
3543 struct ceph_request_redirect *redir)
3544{
3545 u8 struct_v, struct_cv;
3546 u32 len;
3547 void *struct_end;
3548 int ret;
3549
3550 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3551 struct_v = ceph_decode_8(p);
3552 struct_cv = ceph_decode_8(p);
3553 if (struct_cv > 1) {
3554 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3555 struct_v, struct_cv);
3556 goto e_inval;
3557 }
3558 len = ceph_decode_32(p);
3559 ceph_decode_need(p, end, len, e_inval);
3560 struct_end = *p + len;
3561
3562 ret = ceph_oloc_decode(p, end, &redir->oloc);
3563 if (ret)
3564 goto out;
3565
3566 len = ceph_decode_32(p);
3567 if (len > 0) {
3568 pr_warn("ceph_request_redirect::object_name is set\n");
3569 goto e_inval;
3570 }
3571
3572 /* skip the rest */
3573 *p = struct_end;
3574out:
3575 return ret;
3576
3577e_inval:
3578 ret = -EINVAL;
3579 goto out;
3580}
3581
3582struct MOSDOpReply {
3583 struct ceph_pg pgid;
3584 u64 flags;
3585 int result;
3586 u32 epoch;
3587 int num_ops;
3588 u32 outdata_len[CEPH_OSD_MAX_OPS];
3589 s32 rval[CEPH_OSD_MAX_OPS];
3590 int retry_attempt;
3591 struct ceph_eversion replay_version;
3592 u64 user_version;
3593 struct ceph_request_redirect redirect;
3594};
3595
3596static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
3597{
3598 void *p = msg->front.iov_base;
3599 void *const end = p + msg->front.iov_len;
3600 u16 version = le16_to_cpu(msg->hdr.version);
3601 struct ceph_eversion bad_replay_version;
3602 u8 decode_redir;
3603 u32 len;
3604 int ret;
3605 int i;
3606
3607 ceph_decode_32_safe(&p, end, len, e_inval);
3608 ceph_decode_need(&p, end, len, e_inval);
3609 p += len; /* skip oid */
3610
3611 ret = ceph_decode_pgid(&p, end, &m->pgid);
3612 if (ret)
3613 return ret;
3614
3615 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3616 ceph_decode_32_safe(&p, end, m->result, e_inval);
3617 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3618 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3619 p += sizeof(bad_replay_version);
3620 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
3621
3622 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3623 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3624 goto e_inval;
3625
3626 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3627 e_inval);
3628 for (i = 0; i < m->num_ops; i++) {
3629 struct ceph_osd_op *op = p;
3630
3631 m->outdata_len[i] = le32_to_cpu(op->payload_len);
3632 p += sizeof(*op);
3633 }
3634
3635 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3636 for (i = 0; i < m->num_ops; i++)
3637 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
3638
3639 if (version >= 5) {
3640 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3641 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3642 p += sizeof(m->replay_version);
3643 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3644 } else {
3645 m->replay_version = bad_replay_version; /* struct */
3646 m->user_version = le64_to_cpu(m->replay_version.version);
3647 }
3648
3649 if (version >= 6) {
3650 if (version >= 7)
3651 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
3652 else
3653 decode_redir = 1;
3654 } else {
3655 decode_redir = 0;
3656 }
3657
3658 if (decode_redir) {
3659 ret = ceph_redirect_decode(&p, end, &m->redirect);
3660 if (ret)
3661 return ret;
3662 } else {
3663 ceph_oloc_init(&m->redirect.oloc);
3664 }
3665
3666 return 0;
3667
3668e_inval:
3669 return -EINVAL;
3670}
3671
3672/*
3673 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3674 * specified.
3675 */
3676static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3677{
3678 struct ceph_osd_client *osdc = osd->o_osdc;
3679 struct ceph_osd_request *req;
3680 struct MOSDOpReply m;
3681 u64 tid = le64_to_cpu(msg->hdr.tid);
3682 u32 data_len = 0;
3683 int ret;
3684 int i;
3685
3686 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3687
3688 down_read(&osdc->lock);
3689 if (!osd_registered(osd)) {
3690 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3691 goto out_unlock_osdc;
3692 }
3693 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3694
3695 mutex_lock(&osd->lock);
3696 req = lookup_request(&osd->o_requests, tid);
3697 if (!req) {
3698 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3699 goto out_unlock_session;
3700 }
3701
3702 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3703 ret = decode_MOSDOpReply(msg, &m);
3704 m.redirect.oloc.pool_ns = NULL;
3705 if (ret) {
3706 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3707 req->r_tid, ret);
3708 ceph_msg_dump(msg);
3709 goto fail_request;
3710 }
3711 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3712 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3713 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3714 le64_to_cpu(m.replay_version.version), m.user_version);
3715
3716 if (m.retry_attempt >= 0) {
3717 if (m.retry_attempt != req->r_attempts - 1) {
3718 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3719 req, req->r_tid, m.retry_attempt,
3720 req->r_attempts - 1);
3721 goto out_unlock_session;
3722 }
3723 } else {
3724 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3725 }
3726
3727 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3728 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3729 m.redirect.oloc.pool);
3730 unlink_request(osd, req);
3731 mutex_unlock(&osd->lock);
3732
3733 /*
3734 * Not ceph_oloc_copy() - changing pool_ns is not
3735 * supported.
3736 */
3737 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3738 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED |
3739 CEPH_OSD_FLAG_IGNORE_OVERLAY |
3740 CEPH_OSD_FLAG_IGNORE_CACHE;
3741 req->r_tid = 0;
3742 __submit_request(req, false);
3743 goto out_unlock_osdc;
3744 }
3745
3746 if (m.result == -EAGAIN) {
3747 dout("req %p tid %llu EAGAIN\n", req, req->r_tid);
3748 unlink_request(osd, req);
3749 mutex_unlock(&osd->lock);
3750
3751 /*
3752 * The object is missing on the replica or not (yet)
3753 * readable. Clear pgid to force a resend to the primary
3754 * via legacy_change.
3755 */
3756 req->r_t.pgid.pool = 0;
3757 req->r_t.pgid.seed = 0;
3758 WARN_ON(!req->r_t.used_replica);
3759 req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS |
3760 CEPH_OSD_FLAG_LOCALIZE_READS);
3761 req->r_tid = 0;
3762 __submit_request(req, false);
3763 goto out_unlock_osdc;
3764 }
3765
3766 if (m.num_ops != req->r_num_ops) {
3767 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3768 req->r_num_ops, req->r_tid);
3769 goto fail_request;
3770 }
3771 for (i = 0; i < req->r_num_ops; i++) {
3772 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3773 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3774 req->r_ops[i].rval = m.rval[i];
3775 req->r_ops[i].outdata_len = m.outdata_len[i];
3776 data_len += m.outdata_len[i];
3777 }
3778 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3779 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3780 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3781 goto fail_request;
3782 }
3783 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3784 req, req->r_tid, m.result, data_len);
3785
3786 /*
3787 * Since we only ever request ONDISK, we should only ever get
3788 * one (type of) reply back.
3789 */
3790 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3791 req->r_result = m.result ?: data_len;
3792 finish_request(req);
3793 mutex_unlock(&osd->lock);
3794 up_read(&osdc->lock);
3795
3796 __complete_request(req);
3797 return;
3798
3799fail_request:
3800 complete_request(req, -EIO);
3801out_unlock_session:
3802 mutex_unlock(&osd->lock);
3803out_unlock_osdc:
3804 up_read(&osdc->lock);
3805}
3806
3807static void set_pool_was_full(struct ceph_osd_client *osdc)
3808{
3809 struct rb_node *n;
3810
3811 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3812 struct ceph_pg_pool_info *pi =
3813 rb_entry(n, struct ceph_pg_pool_info, node);
3814
3815 pi->was_full = __pool_full(pi);
3816 }
3817}
3818
3819static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
3820{
3821 struct ceph_pg_pool_info *pi;
3822
3823 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3824 if (!pi)
3825 return false;
3826
3827 return pi->was_full && !__pool_full(pi);
3828}
3829
3830static enum calc_target_result
3831recalc_linger_target(struct ceph_osd_linger_request *lreq)
3832{
3833 struct ceph_osd_client *osdc = lreq->osdc;
3834 enum calc_target_result ct_res;
3835
3836 ct_res = calc_target(osdc, &lreq->t, true);
3837 if (ct_res == CALC_TARGET_NEED_RESEND) {
3838 struct ceph_osd *osd;
3839
3840 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3841 if (osd != lreq->osd) {
3842 unlink_linger(lreq->osd, lreq);
3843 link_linger(osd, lreq);
3844 }
3845 }
3846
3847 return ct_res;
3848}
3849
3850/*
3851 * Requeue requests whose mapping to an OSD has changed.
3852 */
3853static void scan_requests(struct ceph_osd *osd,
3854 bool force_resend,
3855 bool cleared_full,
3856 bool check_pool_cleared_full,
3857 struct rb_root *need_resend,
3858 struct list_head *need_resend_linger)
3859{
3860 struct ceph_osd_client *osdc = osd->o_osdc;
3861 struct rb_node *n;
3862 bool force_resend_writes;
3863
3864 for (n = rb_first(&osd->o_linger_requests); n; ) {
3865 struct ceph_osd_linger_request *lreq =
3866 rb_entry(n, struct ceph_osd_linger_request, node);
3867 enum calc_target_result ct_res;
3868
3869 n = rb_next(n); /* recalc_linger_target() */
3870
3871 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3872 lreq->linger_id);
3873 ct_res = recalc_linger_target(lreq);
3874 switch (ct_res) {
3875 case CALC_TARGET_NO_ACTION:
3876 force_resend_writes = cleared_full ||
3877 (check_pool_cleared_full &&
3878 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3879 if (!force_resend && !force_resend_writes)
3880 break;
3881
3882 fallthrough;
3883 case CALC_TARGET_NEED_RESEND:
3884 cancel_linger_map_check(lreq);
3885 /*
3886 * scan_requests() for the previous epoch(s)
3887 * may have already added it to the list, since
3888 * it's not unlinked here.
3889 */
3890 if (list_empty(&lreq->scan_item))
3891 list_add_tail(&lreq->scan_item, need_resend_linger);
3892 break;
3893 case CALC_TARGET_POOL_DNE:
3894 list_del_init(&lreq->scan_item);
3895 check_linger_pool_dne(lreq);
3896 break;
3897 }
3898 }
3899
3900 for (n = rb_first(&osd->o_requests); n; ) {
3901 struct ceph_osd_request *req =
3902 rb_entry(n, struct ceph_osd_request, r_node);
3903 enum calc_target_result ct_res;
3904
3905 n = rb_next(n); /* unlink_request(), check_pool_dne() */
3906
3907 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3908 ct_res = calc_target(osdc, &req->r_t, false);
3909 switch (ct_res) {
3910 case CALC_TARGET_NO_ACTION:
3911 force_resend_writes = cleared_full ||
3912 (check_pool_cleared_full &&
3913 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3914 if (!force_resend &&
3915 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3916 !force_resend_writes))
3917 break;
3918
3919 fallthrough;
3920 case CALC_TARGET_NEED_RESEND:
3921 cancel_map_check(req);
3922 unlink_request(osd, req);
3923 insert_request(need_resend, req);
3924 break;
3925 case CALC_TARGET_POOL_DNE:
3926 check_pool_dne(req);
3927 break;
3928 }
3929 }
3930}
3931
3932static int handle_one_map(struct ceph_osd_client *osdc,
3933 void *p, void *end, bool incremental,
3934 struct rb_root *need_resend,
3935 struct list_head *need_resend_linger)
3936{
3937 struct ceph_osdmap *newmap;
3938 struct rb_node *n;
3939 bool skipped_map = false;
3940 bool was_full;
3941
3942 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3943 set_pool_was_full(osdc);
3944
3945 if (incremental)
3946 newmap = osdmap_apply_incremental(&p, end,
3947 ceph_msgr2(osdc->client),
3948 osdc->osdmap);
3949 else
3950 newmap = ceph_osdmap_decode(&p, end, ceph_msgr2(osdc->client));
3951 if (IS_ERR(newmap))
3952 return PTR_ERR(newmap);
3953
3954 if (newmap != osdc->osdmap) {
3955 /*
3956 * Preserve ->was_full before destroying the old map.
3957 * For pools that weren't in the old map, ->was_full
3958 * should be false.
3959 */
3960 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3961 struct ceph_pg_pool_info *pi =
3962 rb_entry(n, struct ceph_pg_pool_info, node);
3963 struct ceph_pg_pool_info *old_pi;
3964
3965 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3966 if (old_pi)
3967 pi->was_full = old_pi->was_full;
3968 else
3969 WARN_ON(pi->was_full);
3970 }
3971
3972 if (osdc->osdmap->epoch &&
3973 osdc->osdmap->epoch + 1 < newmap->epoch) {
3974 WARN_ON(incremental);
3975 skipped_map = true;
3976 }
3977
3978 ceph_osdmap_destroy(osdc->osdmap);
3979 osdc->osdmap = newmap;
3980 }
3981
3982 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3983 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3984 need_resend, need_resend_linger);
3985
3986 for (n = rb_first(&osdc->osds); n; ) {
3987 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3988
3989 n = rb_next(n); /* close_osd() */
3990
3991 scan_requests(osd, skipped_map, was_full, true, need_resend,
3992 need_resend_linger);
3993 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3994 memcmp(&osd->o_con.peer_addr,
3995 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3996 sizeof(struct ceph_entity_addr)))
3997 close_osd(osd);
3998 }
3999
4000 return 0;
4001}
4002
4003static void kick_requests(struct ceph_osd_client *osdc,
4004 struct rb_root *need_resend,
4005 struct list_head *need_resend_linger)
4006{
4007 struct ceph_osd_linger_request *lreq, *nlreq;
4008 enum calc_target_result ct_res;
4009 struct rb_node *n;
4010
4011 /* make sure need_resend targets reflect latest map */
4012 for (n = rb_first(need_resend); n; ) {
4013 struct ceph_osd_request *req =
4014 rb_entry(n, struct ceph_osd_request, r_node);
4015
4016 n = rb_next(n);
4017
4018 if (req->r_t.epoch < osdc->osdmap->epoch) {
4019 ct_res = calc_target(osdc, &req->r_t, false);
4020 if (ct_res == CALC_TARGET_POOL_DNE) {
4021 erase_request(need_resend, req);
4022 check_pool_dne(req);
4023 }
4024 }
4025 }
4026
4027 for (n = rb_first(need_resend); n; ) {
4028 struct ceph_osd_request *req =
4029 rb_entry(n, struct ceph_osd_request, r_node);
4030 struct ceph_osd *osd;
4031
4032 n = rb_next(n);
4033 erase_request(need_resend, req); /* before link_request() */
4034
4035 osd = lookup_create_osd(osdc, req->r_t.osd, true);
4036 link_request(osd, req);
4037 if (!req->r_linger) {
4038 if (!osd_homeless(osd) && !req->r_t.paused)
4039 send_request(req);
4040 } else {
4041 cancel_linger_request(req);
4042 }
4043 }
4044
4045 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
4046 if (!osd_homeless(lreq->osd))
4047 send_linger(lreq);
4048
4049 list_del_init(&lreq->scan_item);
4050 }
4051}
4052
4053/*
4054 * Process updated osd map.
4055 *
4056 * The message contains any number of incremental and full maps, normally
4057 * indicating some sort of topology change in the cluster. Kick requests
4058 * off to different OSDs as needed.
4059 */
4060void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
4061{
4062 void *p = msg->front.iov_base;
4063 void *const end = p + msg->front.iov_len;
4064 u32 nr_maps, maplen;
4065 u32 epoch;
4066 struct ceph_fsid fsid;
4067 struct rb_root need_resend = RB_ROOT;
4068 LIST_HEAD(need_resend_linger);
4069 bool handled_incremental = false;
4070 bool was_pauserd, was_pausewr;
4071 bool pauserd, pausewr;
4072 int err;
4073
4074 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
4075 down_write(&osdc->lock);
4076
4077 /* verify fsid */
4078 ceph_decode_need(&p, end, sizeof(fsid), bad);
4079 ceph_decode_copy(&p, &fsid, sizeof(fsid));
4080 if (ceph_check_fsid(osdc->client, &fsid) < 0)
4081 goto bad;
4082
4083 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4084 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4085 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4086 have_pool_full(osdc);
4087
4088 /* incremental maps */
4089 ceph_decode_32_safe(&p, end, nr_maps, bad);
4090 dout(" %d inc maps\n", nr_maps);
4091 while (nr_maps > 0) {
4092 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4093 epoch = ceph_decode_32(&p);
4094 maplen = ceph_decode_32(&p);
4095 ceph_decode_need(&p, end, maplen, bad);
4096 if (osdc->osdmap->epoch &&
4097 osdc->osdmap->epoch + 1 == epoch) {
4098 dout("applying incremental map %u len %d\n",
4099 epoch, maplen);
4100 err = handle_one_map(osdc, p, p + maplen, true,
4101 &need_resend, &need_resend_linger);
4102 if (err)
4103 goto bad;
4104 handled_incremental = true;
4105 } else {
4106 dout("ignoring incremental map %u len %d\n",
4107 epoch, maplen);
4108 }
4109 p += maplen;
4110 nr_maps--;
4111 }
4112 if (handled_incremental)
4113 goto done;
4114
4115 /* full maps */
4116 ceph_decode_32_safe(&p, end, nr_maps, bad);
4117 dout(" %d full maps\n", nr_maps);
4118 while (nr_maps) {
4119 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4120 epoch = ceph_decode_32(&p);
4121 maplen = ceph_decode_32(&p);
4122 ceph_decode_need(&p, end, maplen, bad);
4123 if (nr_maps > 1) {
4124 dout("skipping non-latest full map %u len %d\n",
4125 epoch, maplen);
4126 } else if (osdc->osdmap->epoch >= epoch) {
4127 dout("skipping full map %u len %d, "
4128 "older than our %u\n", epoch, maplen,
4129 osdc->osdmap->epoch);
4130 } else {
4131 dout("taking full map %u len %d\n", epoch, maplen);
4132 err = handle_one_map(osdc, p, p + maplen, false,
4133 &need_resend, &need_resend_linger);
4134 if (err)
4135 goto bad;
4136 }
4137 p += maplen;
4138 nr_maps--;
4139 }
4140
4141done:
4142 /*
4143 * subscribe to subsequent osdmap updates if full to ensure
4144 * we find out when we are no longer full and stop returning
4145 * ENOSPC.
4146 */
4147 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4148 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4149 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4150 have_pool_full(osdc);
4151 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4152 osdc->osdmap->epoch < osdc->epoch_barrier)
4153 maybe_request_map(osdc);
4154
4155 kick_requests(osdc, &need_resend, &need_resend_linger);
4156
4157 ceph_osdc_abort_on_full(osdc);
4158 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4159 osdc->osdmap->epoch);
4160 up_write(&osdc->lock);
4161 wake_up_all(&osdc->client->auth_wq);
4162 return;
4163
4164bad:
4165 pr_err("osdc handle_map corrupt msg\n");
4166 ceph_msg_dump(msg);
4167 up_write(&osdc->lock);
4168}
4169
4170/*
4171 * Resubmit requests pending on the given osd.
4172 */
4173static void kick_osd_requests(struct ceph_osd *osd)
4174{
4175 struct rb_node *n;
4176
4177 clear_backoffs(osd);
4178
4179 for (n = rb_first(&osd->o_requests); n; ) {
4180 struct ceph_osd_request *req =
4181 rb_entry(n, struct ceph_osd_request, r_node);
4182
4183 n = rb_next(n); /* cancel_linger_request() */
4184
4185 if (!req->r_linger) {
4186 if (!req->r_t.paused)
4187 send_request(req);
4188 } else {
4189 cancel_linger_request(req);
4190 }
4191 }
4192 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4193 struct ceph_osd_linger_request *lreq =
4194 rb_entry(n, struct ceph_osd_linger_request, node);
4195
4196 send_linger(lreq);
4197 }
4198}
4199
4200/*
4201 * If the osd connection drops, we need to resubmit all requests.
4202 */
4203static void osd_fault(struct ceph_connection *con)
4204{
4205 struct ceph_osd *osd = con->private;
4206 struct ceph_osd_client *osdc = osd->o_osdc;
4207
4208 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4209
4210 down_write(&osdc->lock);
4211 if (!osd_registered(osd)) {
4212 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4213 goto out_unlock;
4214 }
4215
4216 if (!reopen_osd(osd))
4217 kick_osd_requests(osd);
4218 maybe_request_map(osdc);
4219
4220out_unlock:
4221 up_write(&osdc->lock);
4222}
4223
4224struct MOSDBackoff {
4225 struct ceph_spg spgid;
4226 u32 map_epoch;
4227 u8 op;
4228 u64 id;
4229 struct ceph_hobject_id *begin;
4230 struct ceph_hobject_id *end;
4231};
4232
4233static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4234{
4235 void *p = msg->front.iov_base;
4236 void *const end = p + msg->front.iov_len;
4237 u8 struct_v;
4238 u32 struct_len;
4239 int ret;
4240
4241 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4242 if (ret)
4243 return ret;
4244
4245 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4246 if (ret)
4247 return ret;
4248
4249 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4250 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4251 ceph_decode_8_safe(&p, end, m->op, e_inval);
4252 ceph_decode_64_safe(&p, end, m->id, e_inval);
4253
4254 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4255 if (!m->begin)
4256 return -ENOMEM;
4257
4258 ret = decode_hoid(&p, end, m->begin);
4259 if (ret) {
4260 free_hoid(m->begin);
4261 return ret;
4262 }
4263
4264 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4265 if (!m->end) {
4266 free_hoid(m->begin);
4267 return -ENOMEM;
4268 }
4269
4270 ret = decode_hoid(&p, end, m->end);
4271 if (ret) {
4272 free_hoid(m->begin);
4273 free_hoid(m->end);
4274 return ret;
4275 }
4276
4277 return 0;
4278
4279e_inval:
4280 return -EINVAL;
4281}
4282
4283static struct ceph_msg *create_backoff_message(
4284 const struct ceph_osd_backoff *backoff,
4285 u32 map_epoch)
4286{
4287 struct ceph_msg *msg;
4288 void *p, *end;
4289 int msg_size;
4290
4291 msg_size = CEPH_ENCODING_START_BLK_LEN +
4292 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4293 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4294 msg_size += CEPH_ENCODING_START_BLK_LEN +
4295 hoid_encoding_size(backoff->begin);
4296 msg_size += CEPH_ENCODING_START_BLK_LEN +
4297 hoid_encoding_size(backoff->end);
4298
4299 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4300 if (!msg)
4301 return NULL;
4302
4303 p = msg->front.iov_base;
4304 end = p + msg->front_alloc_len;
4305
4306 encode_spgid(&p, &backoff->spgid);
4307 ceph_encode_32(&p, map_epoch);
4308 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4309 ceph_encode_64(&p, backoff->id);
4310 encode_hoid(&p, end, backoff->begin);
4311 encode_hoid(&p, end, backoff->end);
4312 BUG_ON(p != end);
4313
4314 msg->front.iov_len = p - msg->front.iov_base;
4315 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4316 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4317
4318 return msg;
4319}
4320
4321static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4322{
4323 struct ceph_spg_mapping *spg;
4324 struct ceph_osd_backoff *backoff;
4325 struct ceph_msg *msg;
4326
4327 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4328 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4329
4330 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4331 if (!spg) {
4332 spg = alloc_spg_mapping();
4333 if (!spg) {
4334 pr_err("%s failed to allocate spg\n", __func__);
4335 return;
4336 }
4337 spg->spgid = m->spgid; /* struct */
4338 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4339 }
4340
4341 backoff = alloc_backoff();
4342 if (!backoff) {
4343 pr_err("%s failed to allocate backoff\n", __func__);
4344 return;
4345 }
4346 backoff->spgid = m->spgid; /* struct */
4347 backoff->id = m->id;
4348 backoff->begin = m->begin;
4349 m->begin = NULL; /* backoff now owns this */
4350 backoff->end = m->end;
4351 m->end = NULL; /* ditto */
4352
4353 insert_backoff(&spg->backoffs, backoff);
4354 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4355
4356 /*
4357 * Ack with original backoff's epoch so that the OSD can
4358 * discard this if there was a PG split.
4359 */
4360 msg = create_backoff_message(backoff, m->map_epoch);
4361 if (!msg) {
4362 pr_err("%s failed to allocate msg\n", __func__);
4363 return;
4364 }
4365 ceph_con_send(&osd->o_con, msg);
4366}
4367
4368static bool target_contained_by(const struct ceph_osd_request_target *t,
4369 const struct ceph_hobject_id *begin,
4370 const struct ceph_hobject_id *end)
4371{
4372 struct ceph_hobject_id hoid;
4373 int cmp;
4374
4375 hoid_fill_from_target(&hoid, t);
4376 cmp = hoid_compare(&hoid, begin);
4377 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4378}
4379
4380static void handle_backoff_unblock(struct ceph_osd *osd,
4381 const struct MOSDBackoff *m)
4382{
4383 struct ceph_spg_mapping *spg;
4384 struct ceph_osd_backoff *backoff;
4385 struct rb_node *n;
4386
4387 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4388 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4389
4390 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4391 if (!backoff) {
4392 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4393 __func__, osd->o_osd, m->spgid.pgid.pool,
4394 m->spgid.pgid.seed, m->spgid.shard, m->id);
4395 return;
4396 }
4397
4398 if (hoid_compare(backoff->begin, m->begin) &&
4399 hoid_compare(backoff->end, m->end)) {
4400 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4401 __func__, osd->o_osd, m->spgid.pgid.pool,
4402 m->spgid.pgid.seed, m->spgid.shard, m->id);
4403 /* unblock it anyway... */
4404 }
4405
4406 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4407 BUG_ON(!spg);
4408
4409 erase_backoff(&spg->backoffs, backoff);
4410 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4411 free_backoff(backoff);
4412
4413 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4414 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4415 free_spg_mapping(spg);
4416 }
4417
4418 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4419 struct ceph_osd_request *req =
4420 rb_entry(n, struct ceph_osd_request, r_node);
4421
4422 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4423 /*
4424 * Match against @m, not @backoff -- the PG may
4425 * have split on the OSD.
4426 */
4427 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4428 /*
4429 * If no other installed backoff applies,
4430 * resend.
4431 */
4432 send_request(req);
4433 }
4434 }
4435 }
4436}
4437
4438static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4439{
4440 struct ceph_osd_client *osdc = osd->o_osdc;
4441 struct MOSDBackoff m;
4442 int ret;
4443
4444 down_read(&osdc->lock);
4445 if (!osd_registered(osd)) {
4446 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4447 up_read(&osdc->lock);
4448 return;
4449 }
4450 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4451
4452 mutex_lock(&osd->lock);
4453 ret = decode_MOSDBackoff(msg, &m);
4454 if (ret) {
4455 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4456 ceph_msg_dump(msg);
4457 goto out_unlock;
4458 }
4459
4460 switch (m.op) {
4461 case CEPH_OSD_BACKOFF_OP_BLOCK:
4462 handle_backoff_block(osd, &m);
4463 break;
4464 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4465 handle_backoff_unblock(osd, &m);
4466 break;
4467 default:
4468 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4469 }
4470
4471 free_hoid(m.begin);
4472 free_hoid(m.end);
4473
4474out_unlock:
4475 mutex_unlock(&osd->lock);
4476 up_read(&osdc->lock);
4477}
4478
4479/*
4480 * Process osd watch notifications
4481 */
4482static void handle_watch_notify(struct ceph_osd_client *osdc,
4483 struct ceph_msg *msg)
4484{
4485 void *p = msg->front.iov_base;
4486 void *const end = p + msg->front.iov_len;
4487 struct ceph_osd_linger_request *lreq;
4488 struct linger_work *lwork;
4489 u8 proto_ver, opcode;
4490 u64 cookie, notify_id;
4491 u64 notifier_id = 0;
4492 s32 return_code = 0;
4493 void *payload = NULL;
4494 u32 payload_len = 0;
4495
4496 ceph_decode_8_safe(&p, end, proto_ver, bad);
4497 ceph_decode_8_safe(&p, end, opcode, bad);
4498 ceph_decode_64_safe(&p, end, cookie, bad);
4499 p += 8; /* skip ver */
4500 ceph_decode_64_safe(&p, end, notify_id, bad);
4501
4502 if (proto_ver >= 1) {
4503 ceph_decode_32_safe(&p, end, payload_len, bad);
4504 ceph_decode_need(&p, end, payload_len, bad);
4505 payload = p;
4506 p += payload_len;
4507 }
4508
4509 if (le16_to_cpu(msg->hdr.version) >= 2)
4510 ceph_decode_32_safe(&p, end, return_code, bad);
4511
4512 if (le16_to_cpu(msg->hdr.version) >= 3)
4513 ceph_decode_64_safe(&p, end, notifier_id, bad);
4514
4515 down_read(&osdc->lock);
4516 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4517 if (!lreq) {
4518 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4519 cookie);
4520 goto out_unlock_osdc;
4521 }
4522
4523 mutex_lock(&lreq->lock);
4524 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4525 opcode, cookie, lreq, lreq->is_watch);
4526 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4527 if (!lreq->last_error) {
4528 lreq->last_error = -ENOTCONN;
4529 queue_watch_error(lreq);
4530 }
4531 } else if (!lreq->is_watch) {
4532 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4533 if (lreq->notify_id && lreq->notify_id != notify_id) {
4534 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4535 lreq->notify_id, notify_id);
4536 } else if (!completion_done(&lreq->notify_finish_wait)) {
4537 struct ceph_msg_data *data =
4538 msg->num_data_items ? &msg->data[0] : NULL;
4539
4540 if (data) {
4541 if (lreq->preply_pages) {
4542 WARN_ON(data->type !=
4543 CEPH_MSG_DATA_PAGES);
4544 *lreq->preply_pages = data->pages;
4545 *lreq->preply_len = data->length;
4546 data->own_pages = false;
4547 }
4548 }
4549 lreq->notify_finish_error = return_code;
4550 complete_all(&lreq->notify_finish_wait);
4551 }
4552 } else {
4553 /* CEPH_WATCH_EVENT_NOTIFY */
4554 lwork = lwork_alloc(lreq, do_watch_notify);
4555 if (!lwork) {
4556 pr_err("failed to allocate notify-lwork\n");
4557 goto out_unlock_lreq;
4558 }
4559
4560 lwork->notify.notify_id = notify_id;
4561 lwork->notify.notifier_id = notifier_id;
4562 lwork->notify.payload = payload;
4563 lwork->notify.payload_len = payload_len;
4564 lwork->notify.msg = ceph_msg_get(msg);
4565 lwork_queue(lwork);
4566 }
4567
4568out_unlock_lreq:
4569 mutex_unlock(&lreq->lock);
4570out_unlock_osdc:
4571 up_read(&osdc->lock);
4572 return;
4573
4574bad:
4575 pr_err("osdc handle_watch_notify corrupt msg\n");
4576}
4577
4578/*
4579 * Register request, send initial attempt.
4580 */
4581void ceph_osdc_start_request(struct ceph_osd_client *osdc,
4582 struct ceph_osd_request *req)
4583{
4584 down_read(&osdc->lock);
4585 submit_request(req, false);
4586 up_read(&osdc->lock);
4587}
4588EXPORT_SYMBOL(ceph_osdc_start_request);
4589
4590/*
4591 * Unregister request. If @req was registered, it isn't completed:
4592 * r_result isn't set and __complete_request() isn't invoked.
4593 *
4594 * If @req wasn't registered, this call may have raced with
4595 * handle_reply(), in which case r_result would already be set and
4596 * __complete_request() would be getting invoked, possibly even
4597 * concurrently with this call.
4598 */
4599void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4600{
4601 struct ceph_osd_client *osdc = req->r_osdc;
4602
4603 down_write(&osdc->lock);
4604 if (req->r_osd)
4605 cancel_request(req);
4606 up_write(&osdc->lock);
4607}
4608EXPORT_SYMBOL(ceph_osdc_cancel_request);
4609
4610/*
4611 * @timeout: in jiffies, 0 means "wait forever"
4612 */
4613static int wait_request_timeout(struct ceph_osd_request *req,
4614 unsigned long timeout)
4615{
4616 long left;
4617
4618 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4619 left = wait_for_completion_killable_timeout(&req->r_completion,
4620 ceph_timeout_jiffies(timeout));
4621 if (left <= 0) {
4622 left = left ?: -ETIMEDOUT;
4623 ceph_osdc_cancel_request(req);
4624 } else {
4625 left = req->r_result; /* completed */
4626 }
4627
4628 return left;
4629}
4630
4631/*
4632 * wait for a request to complete
4633 */
4634int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4635 struct ceph_osd_request *req)
4636{
4637 return wait_request_timeout(req, 0);
4638}
4639EXPORT_SYMBOL(ceph_osdc_wait_request);
4640
4641/*
4642 * sync - wait for all in-flight requests to flush. avoid starvation.
4643 */
4644void ceph_osdc_sync(struct ceph_osd_client *osdc)
4645{
4646 struct rb_node *n, *p;
4647 u64 last_tid = atomic64_read(&osdc->last_tid);
4648
4649again:
4650 down_read(&osdc->lock);
4651 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4652 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4653
4654 mutex_lock(&osd->lock);
4655 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4656 struct ceph_osd_request *req =
4657 rb_entry(p, struct ceph_osd_request, r_node);
4658
4659 if (req->r_tid > last_tid)
4660 break;
4661
4662 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4663 continue;
4664
4665 ceph_osdc_get_request(req);
4666 mutex_unlock(&osd->lock);
4667 up_read(&osdc->lock);
4668 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4669 __func__, req, req->r_tid, last_tid);
4670 wait_for_completion(&req->r_completion);
4671 ceph_osdc_put_request(req);
4672 goto again;
4673 }
4674
4675 mutex_unlock(&osd->lock);
4676 }
4677
4678 up_read(&osdc->lock);
4679 dout("%s done last_tid %llu\n", __func__, last_tid);
4680}
4681EXPORT_SYMBOL(ceph_osdc_sync);
4682
4683/*
4684 * Returns a handle, caller owns a ref.
4685 */
4686struct ceph_osd_linger_request *
4687ceph_osdc_watch(struct ceph_osd_client *osdc,
4688 struct ceph_object_id *oid,
4689 struct ceph_object_locator *oloc,
4690 rados_watchcb2_t wcb,
4691 rados_watcherrcb_t errcb,
4692 void *data)
4693{
4694 struct ceph_osd_linger_request *lreq;
4695 int ret;
4696
4697 lreq = linger_alloc(osdc);
4698 if (!lreq)
4699 return ERR_PTR(-ENOMEM);
4700
4701 lreq->is_watch = true;
4702 lreq->wcb = wcb;
4703 lreq->errcb = errcb;
4704 lreq->data = data;
4705 lreq->watch_valid_thru = jiffies;
4706
4707 ceph_oid_copy(&lreq->t.base_oid, oid);
4708 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4709 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4710 ktime_get_real_ts64(&lreq->mtime);
4711
4712 linger_submit(lreq);
4713 ret = linger_reg_commit_wait(lreq);
4714 if (ret) {
4715 linger_cancel(lreq);
4716 goto err_put_lreq;
4717 }
4718
4719 return lreq;
4720
4721err_put_lreq:
4722 linger_put(lreq);
4723 return ERR_PTR(ret);
4724}
4725EXPORT_SYMBOL(ceph_osdc_watch);
4726
4727/*
4728 * Releases a ref.
4729 *
4730 * Times out after mount_timeout to preserve rbd unmap behaviour
4731 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4732 * with mount_timeout").
4733 */
4734int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4735 struct ceph_osd_linger_request *lreq)
4736{
4737 struct ceph_options *opts = osdc->client->options;
4738 struct ceph_osd_request *req;
4739 int ret;
4740
4741 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4742 if (!req)
4743 return -ENOMEM;
4744
4745 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4746 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4747 req->r_flags = CEPH_OSD_FLAG_WRITE;
4748 ktime_get_real_ts64(&req->r_mtime);
4749 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_UNWATCH,
4750 lreq->linger_id, 0);
4751
4752 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4753 if (ret)
4754 goto out_put_req;
4755
4756 ceph_osdc_start_request(osdc, req);
4757 linger_cancel(lreq);
4758 linger_put(lreq);
4759 ret = wait_request_timeout(req, opts->mount_timeout);
4760
4761out_put_req:
4762 ceph_osdc_put_request(req);
4763 return ret;
4764}
4765EXPORT_SYMBOL(ceph_osdc_unwatch);
4766
4767static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4768 u64 notify_id, u64 cookie, void *payload,
4769 u32 payload_len)
4770{
4771 struct ceph_osd_req_op *op;
4772 struct ceph_pagelist *pl;
4773 int ret;
4774
4775 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4776
4777 pl = ceph_pagelist_alloc(GFP_NOIO);
4778 if (!pl)
4779 return -ENOMEM;
4780
4781 ret = ceph_pagelist_encode_64(pl, notify_id);
4782 ret |= ceph_pagelist_encode_64(pl, cookie);
4783 if (payload) {
4784 ret |= ceph_pagelist_encode_32(pl, payload_len);
4785 ret |= ceph_pagelist_append(pl, payload, payload_len);
4786 } else {
4787 ret |= ceph_pagelist_encode_32(pl, 0);
4788 }
4789 if (ret) {
4790 ceph_pagelist_release(pl);
4791 return -ENOMEM;
4792 }
4793
4794 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4795 op->indata_len = pl->length;
4796 return 0;
4797}
4798
4799int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4800 struct ceph_object_id *oid,
4801 struct ceph_object_locator *oloc,
4802 u64 notify_id,
4803 u64 cookie,
4804 void *payload,
4805 u32 payload_len)
4806{
4807 struct ceph_osd_request *req;
4808 int ret;
4809
4810 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4811 if (!req)
4812 return -ENOMEM;
4813
4814 ceph_oid_copy(&req->r_base_oid, oid);
4815 ceph_oloc_copy(&req->r_base_oloc, oloc);
4816 req->r_flags = CEPH_OSD_FLAG_READ;
4817
4818 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4819 payload_len);
4820 if (ret)
4821 goto out_put_req;
4822
4823 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4824 if (ret)
4825 goto out_put_req;
4826
4827 ceph_osdc_start_request(osdc, req);
4828 ret = ceph_osdc_wait_request(osdc, req);
4829
4830out_put_req:
4831 ceph_osdc_put_request(req);
4832 return ret;
4833}
4834EXPORT_SYMBOL(ceph_osdc_notify_ack);
4835
4836/*
4837 * @timeout: in seconds
4838 *
4839 * @preply_{pages,len} are initialized both on success and error.
4840 * The caller is responsible for:
4841 *
4842 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4843 */
4844int ceph_osdc_notify(struct ceph_osd_client *osdc,
4845 struct ceph_object_id *oid,
4846 struct ceph_object_locator *oloc,
4847 void *payload,
4848 u32 payload_len,
4849 u32 timeout,
4850 struct page ***preply_pages,
4851 size_t *preply_len)
4852{
4853 struct ceph_osd_linger_request *lreq;
4854 int ret;
4855
4856 WARN_ON(!timeout);
4857 if (preply_pages) {
4858 *preply_pages = NULL;
4859 *preply_len = 0;
4860 }
4861
4862 lreq = linger_alloc(osdc);
4863 if (!lreq)
4864 return -ENOMEM;
4865
4866 lreq->request_pl = ceph_pagelist_alloc(GFP_NOIO);
4867 if (!lreq->request_pl) {
4868 ret = -ENOMEM;
4869 goto out_put_lreq;
4870 }
4871
4872 ret = ceph_pagelist_encode_32(lreq->request_pl, 1); /* prot_ver */
4873 ret |= ceph_pagelist_encode_32(lreq->request_pl, timeout);
4874 ret |= ceph_pagelist_encode_32(lreq->request_pl, payload_len);
4875 ret |= ceph_pagelist_append(lreq->request_pl, payload, payload_len);
4876 if (ret) {
4877 ret = -ENOMEM;
4878 goto out_put_lreq;
4879 }
4880
4881 /* for notify_id */
4882 lreq->notify_id_pages = ceph_alloc_page_vector(1, GFP_NOIO);
4883 if (IS_ERR(lreq->notify_id_pages)) {
4884 ret = PTR_ERR(lreq->notify_id_pages);
4885 lreq->notify_id_pages = NULL;
4886 goto out_put_lreq;
4887 }
4888
4889 lreq->preply_pages = preply_pages;
4890 lreq->preply_len = preply_len;
4891
4892 ceph_oid_copy(&lreq->t.base_oid, oid);
4893 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4894 lreq->t.flags = CEPH_OSD_FLAG_READ;
4895
4896 linger_submit(lreq);
4897 ret = linger_reg_commit_wait(lreq);
4898 if (!ret)
4899 ret = linger_notify_finish_wait(lreq);
4900 else
4901 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4902
4903 linger_cancel(lreq);
4904out_put_lreq:
4905 linger_put(lreq);
4906 return ret;
4907}
4908EXPORT_SYMBOL(ceph_osdc_notify);
4909
4910/*
4911 * Return the number of milliseconds since the watch was last
4912 * confirmed, or an error. If there is an error, the watch is no
4913 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4914 */
4915int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4916 struct ceph_osd_linger_request *lreq)
4917{
4918 unsigned long stamp, age;
4919 int ret;
4920
4921 down_read(&osdc->lock);
4922 mutex_lock(&lreq->lock);
4923 stamp = lreq->watch_valid_thru;
4924 if (!list_empty(&lreq->pending_lworks)) {
4925 struct linger_work *lwork =
4926 list_first_entry(&lreq->pending_lworks,
4927 struct linger_work,
4928 pending_item);
4929
4930 if (time_before(lwork->queued_stamp, stamp))
4931 stamp = lwork->queued_stamp;
4932 }
4933 age = jiffies - stamp;
4934 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4935 lreq, lreq->linger_id, age, lreq->last_error);
4936 /* we are truncating to msecs, so return a safe upper bound */
4937 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4938
4939 mutex_unlock(&lreq->lock);
4940 up_read(&osdc->lock);
4941 return ret;
4942}
4943
4944static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4945{
4946 u8 struct_v;
4947 u32 struct_len;
4948 int ret;
4949
4950 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4951 &struct_v, &struct_len);
4952 if (ret)
4953 goto bad;
4954
4955 ret = -EINVAL;
4956 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
4957 ceph_decode_64_safe(p, end, item->cookie, bad);
4958 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
4959
4960 if (struct_v >= 2) {
4961 ret = ceph_decode_entity_addr(p, end, &item->addr);
4962 if (ret)
4963 goto bad;
4964 } else {
4965 ret = 0;
4966 }
4967
4968 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4969 ENTITY_NAME(item->name), item->cookie,
4970 ceph_pr_addr(&item->addr));
4971bad:
4972 return ret;
4973}
4974
4975static int decode_watchers(void **p, void *end,
4976 struct ceph_watch_item **watchers,
4977 u32 *num_watchers)
4978{
4979 u8 struct_v;
4980 u32 struct_len;
4981 int i;
4982 int ret;
4983
4984 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4985 &struct_v, &struct_len);
4986 if (ret)
4987 return ret;
4988
4989 *num_watchers = ceph_decode_32(p);
4990 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4991 if (!*watchers)
4992 return -ENOMEM;
4993
4994 for (i = 0; i < *num_watchers; i++) {
4995 ret = decode_watcher(p, end, *watchers + i);
4996 if (ret) {
4997 kfree(*watchers);
4998 return ret;
4999 }
5000 }
5001
5002 return 0;
5003}
5004
5005/*
5006 * On success, the caller is responsible for:
5007 *
5008 * kfree(watchers);
5009 */
5010int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
5011 struct ceph_object_id *oid,
5012 struct ceph_object_locator *oloc,
5013 struct ceph_watch_item **watchers,
5014 u32 *num_watchers)
5015{
5016 struct ceph_osd_request *req;
5017 struct page **pages;
5018 int ret;
5019
5020 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5021 if (!req)
5022 return -ENOMEM;
5023
5024 ceph_oid_copy(&req->r_base_oid, oid);
5025 ceph_oloc_copy(&req->r_base_oloc, oloc);
5026 req->r_flags = CEPH_OSD_FLAG_READ;
5027
5028 pages = ceph_alloc_page_vector(1, GFP_NOIO);
5029 if (IS_ERR(pages)) {
5030 ret = PTR_ERR(pages);
5031 goto out_put_req;
5032 }
5033
5034 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
5035 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
5036 response_data),
5037 pages, PAGE_SIZE, 0, false, true);
5038
5039 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5040 if (ret)
5041 goto out_put_req;
5042
5043 ceph_osdc_start_request(osdc, req);
5044 ret = ceph_osdc_wait_request(osdc, req);
5045 if (ret >= 0) {
5046 void *p = page_address(pages[0]);
5047 void *const end = p + req->r_ops[0].outdata_len;
5048
5049 ret = decode_watchers(&p, end, watchers, num_watchers);
5050 }
5051
5052out_put_req:
5053 ceph_osdc_put_request(req);
5054 return ret;
5055}
5056EXPORT_SYMBOL(ceph_osdc_list_watchers);
5057
5058/*
5059 * Call all pending notify callbacks - for use after a watch is
5060 * unregistered, to make sure no more callbacks for it will be invoked
5061 */
5062void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
5063{
5064 dout("%s osdc %p\n", __func__, osdc);
5065 flush_workqueue(osdc->notify_wq);
5066}
5067EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5068
5069void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5070{
5071 down_read(&osdc->lock);
5072 maybe_request_map(osdc);
5073 up_read(&osdc->lock);
5074}
5075EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
5076
5077/*
5078 * Execute an OSD class method on an object.
5079 *
5080 * @flags: CEPH_OSD_FLAG_*
5081 * @resp_len: in/out param for reply length
5082 */
5083int ceph_osdc_call(struct ceph_osd_client *osdc,
5084 struct ceph_object_id *oid,
5085 struct ceph_object_locator *oloc,
5086 const char *class, const char *method,
5087 unsigned int flags,
5088 struct page *req_page, size_t req_len,
5089 struct page **resp_pages, size_t *resp_len)
5090{
5091 struct ceph_osd_request *req;
5092 int ret;
5093
5094 if (req_len > PAGE_SIZE)
5095 return -E2BIG;
5096
5097 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5098 if (!req)
5099 return -ENOMEM;
5100
5101 ceph_oid_copy(&req->r_base_oid, oid);
5102 ceph_oloc_copy(&req->r_base_oloc, oloc);
5103 req->r_flags = flags;
5104
5105 ret = osd_req_op_cls_init(req, 0, class, method);
5106 if (ret)
5107 goto out_put_req;
5108
5109 if (req_page)
5110 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5111 0, false, false);
5112 if (resp_pages)
5113 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
5114 *resp_len, 0, false, false);
5115
5116 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5117 if (ret)
5118 goto out_put_req;
5119
5120 ceph_osdc_start_request(osdc, req);
5121 ret = ceph_osdc_wait_request(osdc, req);
5122 if (ret >= 0) {
5123 ret = req->r_ops[0].rval;
5124 if (resp_pages)
5125 *resp_len = req->r_ops[0].outdata_len;
5126 }
5127
5128out_put_req:
5129 ceph_osdc_put_request(req);
5130 return ret;
5131}
5132EXPORT_SYMBOL(ceph_osdc_call);
5133
5134/*
5135 * reset all osd connections
5136 */
5137void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc)
5138{
5139 struct rb_node *n;
5140
5141 down_write(&osdc->lock);
5142 for (n = rb_first(&osdc->osds); n; ) {
5143 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
5144
5145 n = rb_next(n);
5146 if (!reopen_osd(osd))
5147 kick_osd_requests(osd);
5148 }
5149 up_write(&osdc->lock);
5150}
5151
5152/*
5153 * init, shutdown
5154 */
5155int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5156{
5157 int err;
5158
5159 dout("init\n");
5160 osdc->client = client;
5161 init_rwsem(&osdc->lock);
5162 osdc->osds = RB_ROOT;
5163 INIT_LIST_HEAD(&osdc->osd_lru);
5164 spin_lock_init(&osdc->osd_lru_lock);
5165 osd_init(&osdc->homeless_osd);
5166 osdc->homeless_osd.o_osdc = osdc;
5167 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
5168 osdc->last_linger_id = CEPH_LINGER_ID_START;
5169 osdc->linger_requests = RB_ROOT;
5170 osdc->map_checks = RB_ROOT;
5171 osdc->linger_map_checks = RB_ROOT;
5172 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
5173 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5174
5175 err = -ENOMEM;
5176 osdc->osdmap = ceph_osdmap_alloc();
5177 if (!osdc->osdmap)
5178 goto out;
5179
5180 osdc->req_mempool = mempool_create_slab_pool(10,
5181 ceph_osd_request_cache);
5182 if (!osdc->req_mempool)
5183 goto out_map;
5184
5185 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
5186 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
5187 if (err < 0)
5188 goto out_mempool;
5189 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
5190 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5191 "osd_op_reply");
5192 if (err < 0)
5193 goto out_msgpool;
5194
5195 err = -ENOMEM;
5196 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
5197 if (!osdc->notify_wq)
5198 goto out_msgpool_reply;
5199
5200 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5201 if (!osdc->completion_wq)
5202 goto out_notify_wq;
5203
5204 schedule_delayed_work(&osdc->timeout_work,
5205 osdc->client->options->osd_keepalive_timeout);
5206 schedule_delayed_work(&osdc->osds_timeout_work,
5207 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5208
5209 return 0;
5210
5211out_notify_wq:
5212 destroy_workqueue(osdc->notify_wq);
5213out_msgpool_reply:
5214 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5215out_msgpool:
5216 ceph_msgpool_destroy(&osdc->msgpool_op);
5217out_mempool:
5218 mempool_destroy(osdc->req_mempool);
5219out_map:
5220 ceph_osdmap_destroy(osdc->osdmap);
5221out:
5222 return err;
5223}
5224
5225void ceph_osdc_stop(struct ceph_osd_client *osdc)
5226{
5227 destroy_workqueue(osdc->completion_wq);
5228 destroy_workqueue(osdc->notify_wq);
5229 cancel_delayed_work_sync(&osdc->timeout_work);
5230 cancel_delayed_work_sync(&osdc->osds_timeout_work);
5231
5232 down_write(&osdc->lock);
5233 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5234 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5235 struct ceph_osd, o_node);
5236 close_osd(osd);
5237 }
5238 up_write(&osdc->lock);
5239 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5240 osd_cleanup(&osdc->homeless_osd);
5241
5242 WARN_ON(!list_empty(&osdc->osd_lru));
5243 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
5244 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5245 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5246 WARN_ON(atomic_read(&osdc->num_requests));
5247 WARN_ON(atomic_read(&osdc->num_homeless));
5248
5249 ceph_osdmap_destroy(osdc->osdmap);
5250 mempool_destroy(osdc->req_mempool);
5251 ceph_msgpool_destroy(&osdc->msgpool_op);
5252 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5253}
5254
5255int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5256 u64 src_snapid, u64 src_version,
5257 struct ceph_object_id *src_oid,
5258 struct ceph_object_locator *src_oloc,
5259 u32 src_fadvise_flags,
5260 u32 dst_fadvise_flags,
5261 u32 truncate_seq, u64 truncate_size,
5262 u8 copy_from_flags)
5263{
5264 struct ceph_osd_req_op *op;
5265 struct page **pages;
5266 void *p, *end;
5267
5268 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5269 if (IS_ERR(pages))
5270 return PTR_ERR(pages);
5271
5272 op = osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2,
5273 dst_fadvise_flags);
5274 op->copy_from.snapid = src_snapid;
5275 op->copy_from.src_version = src_version;
5276 op->copy_from.flags = copy_from_flags;
5277 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5278
5279 p = page_address(pages[0]);
5280 end = p + PAGE_SIZE;
5281 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5282 encode_oloc(&p, end, src_oloc);
5283 ceph_encode_32(&p, truncate_seq);
5284 ceph_encode_64(&p, truncate_size);
5285 op->indata_len = PAGE_SIZE - (end - p);
5286
5287 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5288 op->indata_len, 0, false, true);
5289 return 0;
5290}
5291EXPORT_SYMBOL(osd_req_op_copy_from_init);
5292
5293int __init ceph_osdc_setup(void)
5294{
5295 size_t size = sizeof(struct ceph_osd_request) +
5296 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5297
5298 BUG_ON(ceph_osd_request_cache);
5299 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5300 0, 0, NULL);
5301
5302 return ceph_osd_request_cache ? 0 : -ENOMEM;
5303}
5304
5305void ceph_osdc_cleanup(void)
5306{
5307 BUG_ON(!ceph_osd_request_cache);
5308 kmem_cache_destroy(ceph_osd_request_cache);
5309 ceph_osd_request_cache = NULL;
5310}
5311
5312/*
5313 * handle incoming message
5314 */
5315static void osd_dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5316{
5317 struct ceph_osd *osd = con->private;
5318 struct ceph_osd_client *osdc = osd->o_osdc;
5319 int type = le16_to_cpu(msg->hdr.type);
5320
5321 switch (type) {
5322 case CEPH_MSG_OSD_MAP:
5323 ceph_osdc_handle_map(osdc, msg);
5324 break;
5325 case CEPH_MSG_OSD_OPREPLY:
5326 handle_reply(osd, msg);
5327 break;
5328 case CEPH_MSG_OSD_BACKOFF:
5329 handle_backoff(osd, msg);
5330 break;
5331 case CEPH_MSG_WATCH_NOTIFY:
5332 handle_watch_notify(osdc, msg);
5333 break;
5334
5335 default:
5336 pr_err("received unknown message type %d %s\n", type,
5337 ceph_msg_type_name(type));
5338 }
5339
5340 ceph_msg_put(msg);
5341}
5342
5343/*
5344 * Lookup and return message for incoming reply. Don't try to do
5345 * anything about a larger than preallocated data portion of the
5346 * message at the moment - for now, just skip the message.
5347 */
5348static struct ceph_msg *get_reply(struct ceph_connection *con,
5349 struct ceph_msg_header *hdr,
5350 int *skip)
5351{
5352 struct ceph_osd *osd = con->private;
5353 struct ceph_osd_client *osdc = osd->o_osdc;
5354 struct ceph_msg *m = NULL;
5355 struct ceph_osd_request *req;
5356 int front_len = le32_to_cpu(hdr->front_len);
5357 int data_len = le32_to_cpu(hdr->data_len);
5358 u64 tid = le64_to_cpu(hdr->tid);
5359
5360 down_read(&osdc->lock);
5361 if (!osd_registered(osd)) {
5362 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5363 *skip = 1;
5364 goto out_unlock_osdc;
5365 }
5366 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5367
5368 mutex_lock(&osd->lock);
5369 req = lookup_request(&osd->o_requests, tid);
5370 if (!req) {
5371 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5372 osd->o_osd, tid);
5373 *skip = 1;
5374 goto out_unlock_session;
5375 }
5376
5377 ceph_msg_revoke_incoming(req->r_reply);
5378
5379 if (front_len > req->r_reply->front_alloc_len) {
5380 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5381 __func__, osd->o_osd, req->r_tid, front_len,
5382 req->r_reply->front_alloc_len);
5383 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5384 false);
5385 if (!m)
5386 goto out_unlock_session;
5387 ceph_msg_put(req->r_reply);
5388 req->r_reply = m;
5389 }
5390
5391 if (data_len > req->r_reply->data_length) {
5392 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5393 __func__, osd->o_osd, req->r_tid, data_len,
5394 req->r_reply->data_length);
5395 m = NULL;
5396 *skip = 1;
5397 goto out_unlock_session;
5398 }
5399
5400 m = ceph_msg_get(req->r_reply);
5401 dout("get_reply tid %lld %p\n", tid, m);
5402
5403out_unlock_session:
5404 mutex_unlock(&osd->lock);
5405out_unlock_osdc:
5406 up_read(&osdc->lock);
5407 return m;
5408}
5409
5410static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5411{
5412 struct ceph_msg *m;
5413 int type = le16_to_cpu(hdr->type);
5414 u32 front_len = le32_to_cpu(hdr->front_len);
5415 u32 data_len = le32_to_cpu(hdr->data_len);
5416
5417 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
5418 if (!m)
5419 return NULL;
5420
5421 if (data_len) {
5422 struct page **pages;
5423
5424 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5425 GFP_NOIO);
5426 if (IS_ERR(pages)) {
5427 ceph_msg_put(m);
5428 return NULL;
5429 }
5430
5431 ceph_msg_data_add_pages(m, pages, data_len, 0, true);
5432 }
5433
5434 return m;
5435}
5436
5437static struct ceph_msg *osd_alloc_msg(struct ceph_connection *con,
5438 struct ceph_msg_header *hdr,
5439 int *skip)
5440{
5441 struct ceph_osd *osd = con->private;
5442 int type = le16_to_cpu(hdr->type);
5443
5444 *skip = 0;
5445 switch (type) {
5446 case CEPH_MSG_OSD_MAP:
5447 case CEPH_MSG_OSD_BACKOFF:
5448 case CEPH_MSG_WATCH_NOTIFY:
5449 return alloc_msg_with_page_vector(hdr);
5450 case CEPH_MSG_OSD_OPREPLY:
5451 return get_reply(con, hdr, skip);
5452 default:
5453 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5454 osd->o_osd, type);
5455 *skip = 1;
5456 return NULL;
5457 }
5458}
5459
5460/*
5461 * Wrappers to refcount containing ceph_osd struct
5462 */
5463static struct ceph_connection *osd_get_con(struct ceph_connection *con)
5464{
5465 struct ceph_osd *osd = con->private;
5466 if (get_osd(osd))
5467 return con;
5468 return NULL;
5469}
5470
5471static void osd_put_con(struct ceph_connection *con)
5472{
5473 struct ceph_osd *osd = con->private;
5474 put_osd(osd);
5475}
5476
5477/*
5478 * authentication
5479 */
5480
5481/*
5482 * Note: returned pointer is the address of a structure that's
5483 * managed separately. Caller must *not* attempt to free it.
5484 */
5485static struct ceph_auth_handshake *
5486osd_get_authorizer(struct ceph_connection *con, int *proto, int force_new)
5487{
5488 struct ceph_osd *o = con->private;
5489 struct ceph_osd_client *osdc = o->o_osdc;
5490 struct ceph_auth_client *ac = osdc->client->monc.auth;
5491 struct ceph_auth_handshake *auth = &o->o_auth;
5492 int ret;
5493
5494 ret = __ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD,
5495 force_new, proto, NULL, NULL);
5496 if (ret)
5497 return ERR_PTR(ret);
5498
5499 return auth;
5500}
5501
5502static int osd_add_authorizer_challenge(struct ceph_connection *con,
5503 void *challenge_buf, int challenge_buf_len)
5504{
5505 struct ceph_osd *o = con->private;
5506 struct ceph_osd_client *osdc = o->o_osdc;
5507 struct ceph_auth_client *ac = osdc->client->monc.auth;
5508
5509 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5510 challenge_buf, challenge_buf_len);
5511}
5512
5513static int osd_verify_authorizer_reply(struct ceph_connection *con)
5514{
5515 struct ceph_osd *o = con->private;
5516 struct ceph_osd_client *osdc = o->o_osdc;
5517 struct ceph_auth_client *ac = osdc->client->monc.auth;
5518 struct ceph_auth_handshake *auth = &o->o_auth;
5519
5520 return ceph_auth_verify_authorizer_reply(ac, auth->authorizer,
5521 auth->authorizer_reply_buf, auth->authorizer_reply_buf_len,
5522 NULL, NULL, NULL, NULL);
5523}
5524
5525static int osd_invalidate_authorizer(struct ceph_connection *con)
5526{
5527 struct ceph_osd *o = con->private;
5528 struct ceph_osd_client *osdc = o->o_osdc;
5529 struct ceph_auth_client *ac = osdc->client->monc.auth;
5530
5531 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5532 return ceph_monc_validate_auth(&osdc->client->monc);
5533}
5534
5535static int osd_get_auth_request(struct ceph_connection *con,
5536 void *buf, int *buf_len,
5537 void **authorizer, int *authorizer_len)
5538{
5539 struct ceph_osd *o = con->private;
5540 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5541 struct ceph_auth_handshake *auth = &o->o_auth;
5542 int ret;
5543
5544 ret = ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD,
5545 buf, buf_len);
5546 if (ret)
5547 return ret;
5548
5549 *authorizer = auth->authorizer_buf;
5550 *authorizer_len = auth->authorizer_buf_len;
5551 return 0;
5552}
5553
5554static int osd_handle_auth_reply_more(struct ceph_connection *con,
5555 void *reply, int reply_len,
5556 void *buf, int *buf_len,
5557 void **authorizer, int *authorizer_len)
5558{
5559 struct ceph_osd *o = con->private;
5560 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5561 struct ceph_auth_handshake *auth = &o->o_auth;
5562 int ret;
5563
5564 ret = ceph_auth_handle_svc_reply_more(ac, auth, reply, reply_len,
5565 buf, buf_len);
5566 if (ret)
5567 return ret;
5568
5569 *authorizer = auth->authorizer_buf;
5570 *authorizer_len = auth->authorizer_buf_len;
5571 return 0;
5572}
5573
5574static int osd_handle_auth_done(struct ceph_connection *con,
5575 u64 global_id, void *reply, int reply_len,
5576 u8 *session_key, int *session_key_len,
5577 u8 *con_secret, int *con_secret_len)
5578{
5579 struct ceph_osd *o = con->private;
5580 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5581 struct ceph_auth_handshake *auth = &o->o_auth;
5582
5583 return ceph_auth_handle_svc_reply_done(ac, auth, reply, reply_len,
5584 session_key, session_key_len,
5585 con_secret, con_secret_len);
5586}
5587
5588static int osd_handle_auth_bad_method(struct ceph_connection *con,
5589 int used_proto, int result,
5590 const int *allowed_protos, int proto_cnt,
5591 const int *allowed_modes, int mode_cnt)
5592{
5593 struct ceph_osd *o = con->private;
5594 struct ceph_mon_client *monc = &o->o_osdc->client->monc;
5595 int ret;
5596
5597 if (ceph_auth_handle_bad_authorizer(monc->auth, CEPH_ENTITY_TYPE_OSD,
5598 used_proto, result,
5599 allowed_protos, proto_cnt,
5600 allowed_modes, mode_cnt)) {
5601 ret = ceph_monc_validate_auth(monc);
5602 if (ret)
5603 return ret;
5604 }
5605
5606 return -EACCES;
5607}
5608
5609static void osd_reencode_message(struct ceph_msg *msg)
5610{
5611 int type = le16_to_cpu(msg->hdr.type);
5612
5613 if (type == CEPH_MSG_OSD_OP)
5614 encode_request_finish(msg);
5615}
5616
5617static int osd_sign_message(struct ceph_msg *msg)
5618{
5619 struct ceph_osd *o = msg->con->private;
5620 struct ceph_auth_handshake *auth = &o->o_auth;
5621
5622 return ceph_auth_sign_message(auth, msg);
5623}
5624
5625static int osd_check_message_signature(struct ceph_msg *msg)
5626{
5627 struct ceph_osd *o = msg->con->private;
5628 struct ceph_auth_handshake *auth = &o->o_auth;
5629
5630 return ceph_auth_check_message_signature(auth, msg);
5631}
5632
5633static const struct ceph_connection_operations osd_con_ops = {
5634 .get = osd_get_con,
5635 .put = osd_put_con,
5636 .alloc_msg = osd_alloc_msg,
5637 .dispatch = osd_dispatch,
5638 .fault = osd_fault,
5639 .reencode_message = osd_reencode_message,
5640 .get_authorizer = osd_get_authorizer,
5641 .add_authorizer_challenge = osd_add_authorizer_challenge,
5642 .verify_authorizer_reply = osd_verify_authorizer_reply,
5643 .invalidate_authorizer = osd_invalidate_authorizer,
5644 .sign_message = osd_sign_message,
5645 .check_message_signature = osd_check_message_signature,
5646 .get_auth_request = osd_get_auth_request,
5647 .handle_auth_reply_more = osd_handle_auth_reply_more,
5648 .handle_auth_done = osd_handle_auth_done,
5649 .handle_auth_bad_method = osd_handle_auth_bad_method,
5650};
1#include <linux/ceph/ceph_debug.h>
2
3#include <linux/module.h>
4#include <linux/err.h>
5#include <linux/highmem.h>
6#include <linux/mm.h>
7#include <linux/pagemap.h>
8#include <linux/slab.h>
9#include <linux/uaccess.h>
10#ifdef CONFIG_BLOCK
11#include <linux/bio.h>
12#endif
13
14#include <linux/ceph/libceph.h>
15#include <linux/ceph/osd_client.h>
16#include <linux/ceph/messenger.h>
17#include <linux/ceph/decode.h>
18#include <linux/ceph/auth.h>
19#include <linux/ceph/pagelist.h>
20
21#define OSD_OP_FRONT_LEN 4096
22#define OSD_OPREPLY_FRONT_LEN 512
23
24static const struct ceph_connection_operations osd_con_ops;
25
26static void send_queued(struct ceph_osd_client *osdc);
27static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
28static void __register_request(struct ceph_osd_client *osdc,
29 struct ceph_osd_request *req);
30static void __unregister_linger_request(struct ceph_osd_client *osdc,
31 struct ceph_osd_request *req);
32static void __send_request(struct ceph_osd_client *osdc,
33 struct ceph_osd_request *req);
34
35static int op_needs_trail(int op)
36{
37 switch (op) {
38 case CEPH_OSD_OP_GETXATTR:
39 case CEPH_OSD_OP_SETXATTR:
40 case CEPH_OSD_OP_CMPXATTR:
41 case CEPH_OSD_OP_CALL:
42 case CEPH_OSD_OP_NOTIFY:
43 return 1;
44 default:
45 return 0;
46 }
47}
48
49static int op_has_extent(int op)
50{
51 return (op == CEPH_OSD_OP_READ ||
52 op == CEPH_OSD_OP_WRITE);
53}
54
55void ceph_calc_raw_layout(struct ceph_osd_client *osdc,
56 struct ceph_file_layout *layout,
57 u64 snapid,
58 u64 off, u64 *plen, u64 *bno,
59 struct ceph_osd_request *req,
60 struct ceph_osd_req_op *op)
61{
62 struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
63 u64 orig_len = *plen;
64 u64 objoff, objlen; /* extent in object */
65
66 reqhead->snapid = cpu_to_le64(snapid);
67
68 /* object extent? */
69 ceph_calc_file_object_mapping(layout, off, plen, bno,
70 &objoff, &objlen);
71 if (*plen < orig_len)
72 dout(" skipping last %llu, final file extent %llu~%llu\n",
73 orig_len - *plen, off, *plen);
74
75 if (op_has_extent(op->op)) {
76 op->extent.offset = objoff;
77 op->extent.length = objlen;
78 }
79 req->r_num_pages = calc_pages_for(off, *plen);
80 req->r_page_alignment = off & ~PAGE_MASK;
81 if (op->op == CEPH_OSD_OP_WRITE)
82 op->payload_len = *plen;
83
84 dout("calc_layout bno=%llx %llu~%llu (%d pages)\n",
85 *bno, objoff, objlen, req->r_num_pages);
86
87}
88EXPORT_SYMBOL(ceph_calc_raw_layout);
89
90/*
91 * Implement client access to distributed object storage cluster.
92 *
93 * All data objects are stored within a cluster/cloud of OSDs, or
94 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
95 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
96 * remote daemons serving up and coordinating consistent and safe
97 * access to storage.
98 *
99 * Cluster membership and the mapping of data objects onto storage devices
100 * are described by the osd map.
101 *
102 * We keep track of pending OSD requests (read, write), resubmit
103 * requests to different OSDs when the cluster topology/data layout
104 * change, or retry the affected requests when the communications
105 * channel with an OSD is reset.
106 */
107
108/*
109 * calculate the mapping of a file extent onto an object, and fill out the
110 * request accordingly. shorten extent as necessary if it crosses an
111 * object boundary.
112 *
113 * fill osd op in request message.
114 */
115static void calc_layout(struct ceph_osd_client *osdc,
116 struct ceph_vino vino,
117 struct ceph_file_layout *layout,
118 u64 off, u64 *plen,
119 struct ceph_osd_request *req,
120 struct ceph_osd_req_op *op)
121{
122 u64 bno;
123
124 ceph_calc_raw_layout(osdc, layout, vino.snap, off,
125 plen, &bno, req, op);
126
127 snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx", vino.ino, bno);
128 req->r_oid_len = strlen(req->r_oid);
129}
130
131/*
132 * requests
133 */
134void ceph_osdc_release_request(struct kref *kref)
135{
136 struct ceph_osd_request *req = container_of(kref,
137 struct ceph_osd_request,
138 r_kref);
139
140 if (req->r_request)
141 ceph_msg_put(req->r_request);
142 if (req->r_con_filling_msg) {
143 dout("release_request revoking pages %p from con %p\n",
144 req->r_pages, req->r_con_filling_msg);
145 ceph_con_revoke_message(req->r_con_filling_msg,
146 req->r_reply);
147 req->r_con_filling_msg->ops->put(req->r_con_filling_msg);
148 }
149 if (req->r_reply)
150 ceph_msg_put(req->r_reply);
151 if (req->r_own_pages)
152 ceph_release_page_vector(req->r_pages,
153 req->r_num_pages);
154#ifdef CONFIG_BLOCK
155 if (req->r_bio)
156 bio_put(req->r_bio);
157#endif
158 ceph_put_snap_context(req->r_snapc);
159 if (req->r_trail) {
160 ceph_pagelist_release(req->r_trail);
161 kfree(req->r_trail);
162 }
163 if (req->r_mempool)
164 mempool_free(req, req->r_osdc->req_mempool);
165 else
166 kfree(req);
167}
168EXPORT_SYMBOL(ceph_osdc_release_request);
169
170static int get_num_ops(struct ceph_osd_req_op *ops, int *needs_trail)
171{
172 int i = 0;
173
174 if (needs_trail)
175 *needs_trail = 0;
176 while (ops[i].op) {
177 if (needs_trail && op_needs_trail(ops[i].op))
178 *needs_trail = 1;
179 i++;
180 }
181
182 return i;
183}
184
185struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
186 int flags,
187 struct ceph_snap_context *snapc,
188 struct ceph_osd_req_op *ops,
189 bool use_mempool,
190 gfp_t gfp_flags,
191 struct page **pages,
192 struct bio *bio)
193{
194 struct ceph_osd_request *req;
195 struct ceph_msg *msg;
196 int needs_trail;
197 int num_op = get_num_ops(ops, &needs_trail);
198 size_t msg_size = sizeof(struct ceph_osd_request_head);
199
200 msg_size += num_op*sizeof(struct ceph_osd_op);
201
202 if (use_mempool) {
203 req = mempool_alloc(osdc->req_mempool, gfp_flags);
204 memset(req, 0, sizeof(*req));
205 } else {
206 req = kzalloc(sizeof(*req), gfp_flags);
207 }
208 if (req == NULL)
209 return NULL;
210
211 req->r_osdc = osdc;
212 req->r_mempool = use_mempool;
213
214 kref_init(&req->r_kref);
215 init_completion(&req->r_completion);
216 init_completion(&req->r_safe_completion);
217 INIT_LIST_HEAD(&req->r_unsafe_item);
218 INIT_LIST_HEAD(&req->r_linger_item);
219 INIT_LIST_HEAD(&req->r_linger_osd);
220 INIT_LIST_HEAD(&req->r_req_lru_item);
221 req->r_flags = flags;
222
223 WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0);
224
225 /* create reply message */
226 if (use_mempool)
227 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
228 else
229 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
230 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
231 if (!msg) {
232 ceph_osdc_put_request(req);
233 return NULL;
234 }
235 req->r_reply = msg;
236
237 /* allocate space for the trailing data */
238 if (needs_trail) {
239 req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags);
240 if (!req->r_trail) {
241 ceph_osdc_put_request(req);
242 return NULL;
243 }
244 ceph_pagelist_init(req->r_trail);
245 }
246 /* create request message; allow space for oid */
247 msg_size += MAX_OBJ_NAME_SIZE;
248 if (snapc)
249 msg_size += sizeof(u64) * snapc->num_snaps;
250 if (use_mempool)
251 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
252 else
253 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
254 if (!msg) {
255 ceph_osdc_put_request(req);
256 return NULL;
257 }
258
259 msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP);
260 memset(msg->front.iov_base, 0, msg->front.iov_len);
261
262 req->r_request = msg;
263 req->r_pages = pages;
264#ifdef CONFIG_BLOCK
265 if (bio) {
266 req->r_bio = bio;
267 bio_get(req->r_bio);
268 }
269#endif
270
271 return req;
272}
273EXPORT_SYMBOL(ceph_osdc_alloc_request);
274
275static void osd_req_encode_op(struct ceph_osd_request *req,
276 struct ceph_osd_op *dst,
277 struct ceph_osd_req_op *src)
278{
279 dst->op = cpu_to_le16(src->op);
280
281 switch (src->op) {
282 case CEPH_OSD_OP_READ:
283 case CEPH_OSD_OP_WRITE:
284 dst->extent.offset =
285 cpu_to_le64(src->extent.offset);
286 dst->extent.length =
287 cpu_to_le64(src->extent.length);
288 dst->extent.truncate_size =
289 cpu_to_le64(src->extent.truncate_size);
290 dst->extent.truncate_seq =
291 cpu_to_le32(src->extent.truncate_seq);
292 break;
293
294 case CEPH_OSD_OP_GETXATTR:
295 case CEPH_OSD_OP_SETXATTR:
296 case CEPH_OSD_OP_CMPXATTR:
297 BUG_ON(!req->r_trail);
298
299 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
300 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
301 dst->xattr.cmp_op = src->xattr.cmp_op;
302 dst->xattr.cmp_mode = src->xattr.cmp_mode;
303 ceph_pagelist_append(req->r_trail, src->xattr.name,
304 src->xattr.name_len);
305 ceph_pagelist_append(req->r_trail, src->xattr.val,
306 src->xattr.value_len);
307 break;
308 case CEPH_OSD_OP_CALL:
309 BUG_ON(!req->r_trail);
310
311 dst->cls.class_len = src->cls.class_len;
312 dst->cls.method_len = src->cls.method_len;
313 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
314
315 ceph_pagelist_append(req->r_trail, src->cls.class_name,
316 src->cls.class_len);
317 ceph_pagelist_append(req->r_trail, src->cls.method_name,
318 src->cls.method_len);
319 ceph_pagelist_append(req->r_trail, src->cls.indata,
320 src->cls.indata_len);
321 break;
322 case CEPH_OSD_OP_ROLLBACK:
323 dst->snap.snapid = cpu_to_le64(src->snap.snapid);
324 break;
325 case CEPH_OSD_OP_STARTSYNC:
326 break;
327 case CEPH_OSD_OP_NOTIFY:
328 {
329 __le32 prot_ver = cpu_to_le32(src->watch.prot_ver);
330 __le32 timeout = cpu_to_le32(src->watch.timeout);
331
332 BUG_ON(!req->r_trail);
333
334 ceph_pagelist_append(req->r_trail,
335 &prot_ver, sizeof(prot_ver));
336 ceph_pagelist_append(req->r_trail,
337 &timeout, sizeof(timeout));
338 }
339 case CEPH_OSD_OP_NOTIFY_ACK:
340 case CEPH_OSD_OP_WATCH:
341 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
342 dst->watch.ver = cpu_to_le64(src->watch.ver);
343 dst->watch.flag = src->watch.flag;
344 break;
345 default:
346 pr_err("unrecognized osd opcode %d\n", dst->op);
347 WARN_ON(1);
348 break;
349 }
350 dst->payload_len = cpu_to_le32(src->payload_len);
351}
352
353/*
354 * build new request AND message
355 *
356 */
357void ceph_osdc_build_request(struct ceph_osd_request *req,
358 u64 off, u64 *plen,
359 struct ceph_osd_req_op *src_ops,
360 struct ceph_snap_context *snapc,
361 struct timespec *mtime,
362 const char *oid,
363 int oid_len)
364{
365 struct ceph_msg *msg = req->r_request;
366 struct ceph_osd_request_head *head;
367 struct ceph_osd_req_op *src_op;
368 struct ceph_osd_op *op;
369 void *p;
370 int num_op = get_num_ops(src_ops, NULL);
371 size_t msg_size = sizeof(*head) + num_op*sizeof(*op);
372 int flags = req->r_flags;
373 u64 data_len = 0;
374 int i;
375
376 head = msg->front.iov_base;
377 op = (void *)(head + 1);
378 p = (void *)(op + num_op);
379
380 req->r_snapc = ceph_get_snap_context(snapc);
381
382 head->client_inc = cpu_to_le32(1); /* always, for now. */
383 head->flags = cpu_to_le32(flags);
384 if (flags & CEPH_OSD_FLAG_WRITE)
385 ceph_encode_timespec(&head->mtime, mtime);
386 head->num_ops = cpu_to_le16(num_op);
387
388
389 /* fill in oid */
390 head->object_len = cpu_to_le32(oid_len);
391 memcpy(p, oid, oid_len);
392 p += oid_len;
393
394 src_op = src_ops;
395 while (src_op->op) {
396 osd_req_encode_op(req, op, src_op);
397 src_op++;
398 op++;
399 }
400
401 if (req->r_trail)
402 data_len += req->r_trail->length;
403
404 if (snapc) {
405 head->snap_seq = cpu_to_le64(snapc->seq);
406 head->num_snaps = cpu_to_le32(snapc->num_snaps);
407 for (i = 0; i < snapc->num_snaps; i++) {
408 put_unaligned_le64(snapc->snaps[i], p);
409 p += sizeof(u64);
410 }
411 }
412
413 if (flags & CEPH_OSD_FLAG_WRITE) {
414 req->r_request->hdr.data_off = cpu_to_le16(off);
415 req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len);
416 } else if (data_len) {
417 req->r_request->hdr.data_off = 0;
418 req->r_request->hdr.data_len = cpu_to_le32(data_len);
419 }
420
421 req->r_request->page_alignment = req->r_page_alignment;
422
423 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
424 msg_size = p - msg->front.iov_base;
425 msg->front.iov_len = msg_size;
426 msg->hdr.front_len = cpu_to_le32(msg_size);
427 return;
428}
429EXPORT_SYMBOL(ceph_osdc_build_request);
430
431/*
432 * build new request AND message, calculate layout, and adjust file
433 * extent as needed.
434 *
435 * if the file was recently truncated, we include information about its
436 * old and new size so that the object can be updated appropriately. (we
437 * avoid synchronously deleting truncated objects because it's slow.)
438 *
439 * if @do_sync, include a 'startsync' command so that the osd will flush
440 * data quickly.
441 */
442struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
443 struct ceph_file_layout *layout,
444 struct ceph_vino vino,
445 u64 off, u64 *plen,
446 int opcode, int flags,
447 struct ceph_snap_context *snapc,
448 int do_sync,
449 u32 truncate_seq,
450 u64 truncate_size,
451 struct timespec *mtime,
452 bool use_mempool, int num_reply,
453 int page_align)
454{
455 struct ceph_osd_req_op ops[3];
456 struct ceph_osd_request *req;
457
458 ops[0].op = opcode;
459 ops[0].extent.truncate_seq = truncate_seq;
460 ops[0].extent.truncate_size = truncate_size;
461 ops[0].payload_len = 0;
462
463 if (do_sync) {
464 ops[1].op = CEPH_OSD_OP_STARTSYNC;
465 ops[1].payload_len = 0;
466 ops[2].op = 0;
467 } else
468 ops[1].op = 0;
469
470 req = ceph_osdc_alloc_request(osdc, flags,
471 snapc, ops,
472 use_mempool,
473 GFP_NOFS, NULL, NULL);
474 if (!req)
475 return NULL;
476
477 /* calculate max write size */
478 calc_layout(osdc, vino, layout, off, plen, req, ops);
479 req->r_file_layout = *layout; /* keep a copy */
480
481 /* in case it differs from natural (file) alignment that
482 calc_layout filled in for us */
483 req->r_num_pages = calc_pages_for(page_align, *plen);
484 req->r_page_alignment = page_align;
485
486 ceph_osdc_build_request(req, off, plen, ops,
487 snapc,
488 mtime,
489 req->r_oid, req->r_oid_len);
490
491 return req;
492}
493EXPORT_SYMBOL(ceph_osdc_new_request);
494
495/*
496 * We keep osd requests in an rbtree, sorted by ->r_tid.
497 */
498static void __insert_request(struct ceph_osd_client *osdc,
499 struct ceph_osd_request *new)
500{
501 struct rb_node **p = &osdc->requests.rb_node;
502 struct rb_node *parent = NULL;
503 struct ceph_osd_request *req = NULL;
504
505 while (*p) {
506 parent = *p;
507 req = rb_entry(parent, struct ceph_osd_request, r_node);
508 if (new->r_tid < req->r_tid)
509 p = &(*p)->rb_left;
510 else if (new->r_tid > req->r_tid)
511 p = &(*p)->rb_right;
512 else
513 BUG();
514 }
515
516 rb_link_node(&new->r_node, parent, p);
517 rb_insert_color(&new->r_node, &osdc->requests);
518}
519
520static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
521 u64 tid)
522{
523 struct ceph_osd_request *req;
524 struct rb_node *n = osdc->requests.rb_node;
525
526 while (n) {
527 req = rb_entry(n, struct ceph_osd_request, r_node);
528 if (tid < req->r_tid)
529 n = n->rb_left;
530 else if (tid > req->r_tid)
531 n = n->rb_right;
532 else
533 return req;
534 }
535 return NULL;
536}
537
538static struct ceph_osd_request *
539__lookup_request_ge(struct ceph_osd_client *osdc,
540 u64 tid)
541{
542 struct ceph_osd_request *req;
543 struct rb_node *n = osdc->requests.rb_node;
544
545 while (n) {
546 req = rb_entry(n, struct ceph_osd_request, r_node);
547 if (tid < req->r_tid) {
548 if (!n->rb_left)
549 return req;
550 n = n->rb_left;
551 } else if (tid > req->r_tid) {
552 n = n->rb_right;
553 } else {
554 return req;
555 }
556 }
557 return NULL;
558}
559
560/*
561 * Resubmit requests pending on the given osd.
562 */
563static void __kick_osd_requests(struct ceph_osd_client *osdc,
564 struct ceph_osd *osd)
565{
566 struct ceph_osd_request *req, *nreq;
567 int err;
568
569 dout("__kick_osd_requests osd%d\n", osd->o_osd);
570 err = __reset_osd(osdc, osd);
571 if (err == -EAGAIN)
572 return;
573
574 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
575 list_move(&req->r_req_lru_item, &osdc->req_unsent);
576 dout("requeued %p tid %llu osd%d\n", req, req->r_tid,
577 osd->o_osd);
578 if (!req->r_linger)
579 req->r_flags |= CEPH_OSD_FLAG_RETRY;
580 }
581
582 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
583 r_linger_osd) {
584 /*
585 * reregister request prior to unregistering linger so
586 * that r_osd is preserved.
587 */
588 BUG_ON(!list_empty(&req->r_req_lru_item));
589 __register_request(osdc, req);
590 list_add(&req->r_req_lru_item, &osdc->req_unsent);
591 list_add(&req->r_osd_item, &req->r_osd->o_requests);
592 __unregister_linger_request(osdc, req);
593 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
594 osd->o_osd);
595 }
596}
597
598static void kick_osd_requests(struct ceph_osd_client *osdc,
599 struct ceph_osd *kickosd)
600{
601 mutex_lock(&osdc->request_mutex);
602 __kick_osd_requests(osdc, kickosd);
603 mutex_unlock(&osdc->request_mutex);
604}
605
606/*
607 * If the osd connection drops, we need to resubmit all requests.
608 */
609static void osd_reset(struct ceph_connection *con)
610{
611 struct ceph_osd *osd = con->private;
612 struct ceph_osd_client *osdc;
613
614 if (!osd)
615 return;
616 dout("osd_reset osd%d\n", osd->o_osd);
617 osdc = osd->o_osdc;
618 down_read(&osdc->map_sem);
619 kick_osd_requests(osdc, osd);
620 send_queued(osdc);
621 up_read(&osdc->map_sem);
622}
623
624/*
625 * Track open sessions with osds.
626 */
627static struct ceph_osd *create_osd(struct ceph_osd_client *osdc)
628{
629 struct ceph_osd *osd;
630
631 osd = kzalloc(sizeof(*osd), GFP_NOFS);
632 if (!osd)
633 return NULL;
634
635 atomic_set(&osd->o_ref, 1);
636 osd->o_osdc = osdc;
637 INIT_LIST_HEAD(&osd->o_requests);
638 INIT_LIST_HEAD(&osd->o_linger_requests);
639 INIT_LIST_HEAD(&osd->o_osd_lru);
640 osd->o_incarnation = 1;
641
642 ceph_con_init(osdc->client->msgr, &osd->o_con);
643 osd->o_con.private = osd;
644 osd->o_con.ops = &osd_con_ops;
645 osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD;
646
647 INIT_LIST_HEAD(&osd->o_keepalive_item);
648 return osd;
649}
650
651static struct ceph_osd *get_osd(struct ceph_osd *osd)
652{
653 if (atomic_inc_not_zero(&osd->o_ref)) {
654 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
655 atomic_read(&osd->o_ref));
656 return osd;
657 } else {
658 dout("get_osd %p FAIL\n", osd);
659 return NULL;
660 }
661}
662
663static void put_osd(struct ceph_osd *osd)
664{
665 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
666 atomic_read(&osd->o_ref) - 1);
667 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
668 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
669
670 if (ac->ops && ac->ops->destroy_authorizer)
671 ac->ops->destroy_authorizer(ac, osd->o_auth.authorizer);
672 kfree(osd);
673 }
674}
675
676/*
677 * remove an osd from our map
678 */
679static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
680{
681 dout("__remove_osd %p\n", osd);
682 BUG_ON(!list_empty(&osd->o_requests));
683 rb_erase(&osd->o_node, &osdc->osds);
684 list_del_init(&osd->o_osd_lru);
685 ceph_con_close(&osd->o_con);
686 put_osd(osd);
687}
688
689static void remove_all_osds(struct ceph_osd_client *osdc)
690{
691 dout("__remove_old_osds %p\n", osdc);
692 mutex_lock(&osdc->request_mutex);
693 while (!RB_EMPTY_ROOT(&osdc->osds)) {
694 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
695 struct ceph_osd, o_node);
696 __remove_osd(osdc, osd);
697 }
698 mutex_unlock(&osdc->request_mutex);
699}
700
701static void __move_osd_to_lru(struct ceph_osd_client *osdc,
702 struct ceph_osd *osd)
703{
704 dout("__move_osd_to_lru %p\n", osd);
705 BUG_ON(!list_empty(&osd->o_osd_lru));
706 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
707 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
708}
709
710static void __remove_osd_from_lru(struct ceph_osd *osd)
711{
712 dout("__remove_osd_from_lru %p\n", osd);
713 if (!list_empty(&osd->o_osd_lru))
714 list_del_init(&osd->o_osd_lru);
715}
716
717static void remove_old_osds(struct ceph_osd_client *osdc)
718{
719 struct ceph_osd *osd, *nosd;
720
721 dout("__remove_old_osds %p\n", osdc);
722 mutex_lock(&osdc->request_mutex);
723 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
724 if (time_before(jiffies, osd->lru_ttl))
725 break;
726 __remove_osd(osdc, osd);
727 }
728 mutex_unlock(&osdc->request_mutex);
729}
730
731/*
732 * reset osd connect
733 */
734static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
735{
736 struct ceph_osd_request *req;
737 int ret = 0;
738
739 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
740 if (list_empty(&osd->o_requests) &&
741 list_empty(&osd->o_linger_requests)) {
742 __remove_osd(osdc, osd);
743 } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd],
744 &osd->o_con.peer_addr,
745 sizeof(osd->o_con.peer_addr)) == 0 &&
746 !ceph_con_opened(&osd->o_con)) {
747 dout(" osd addr hasn't changed and connection never opened,"
748 " letting msgr retry");
749 /* touch each r_stamp for handle_timeout()'s benfit */
750 list_for_each_entry(req, &osd->o_requests, r_osd_item)
751 req->r_stamp = jiffies;
752 ret = -EAGAIN;
753 } else {
754 ceph_con_close(&osd->o_con);
755 ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]);
756 osd->o_incarnation++;
757 }
758 return ret;
759}
760
761static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
762{
763 struct rb_node **p = &osdc->osds.rb_node;
764 struct rb_node *parent = NULL;
765 struct ceph_osd *osd = NULL;
766
767 dout("__insert_osd %p osd%d\n", new, new->o_osd);
768 while (*p) {
769 parent = *p;
770 osd = rb_entry(parent, struct ceph_osd, o_node);
771 if (new->o_osd < osd->o_osd)
772 p = &(*p)->rb_left;
773 else if (new->o_osd > osd->o_osd)
774 p = &(*p)->rb_right;
775 else
776 BUG();
777 }
778
779 rb_link_node(&new->o_node, parent, p);
780 rb_insert_color(&new->o_node, &osdc->osds);
781}
782
783static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
784{
785 struct ceph_osd *osd;
786 struct rb_node *n = osdc->osds.rb_node;
787
788 while (n) {
789 osd = rb_entry(n, struct ceph_osd, o_node);
790 if (o < osd->o_osd)
791 n = n->rb_left;
792 else if (o > osd->o_osd)
793 n = n->rb_right;
794 else
795 return osd;
796 }
797 return NULL;
798}
799
800static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
801{
802 schedule_delayed_work(&osdc->timeout_work,
803 osdc->client->options->osd_keepalive_timeout * HZ);
804}
805
806static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
807{
808 cancel_delayed_work(&osdc->timeout_work);
809}
810
811/*
812 * Register request, assign tid. If this is the first request, set up
813 * the timeout event.
814 */
815static void __register_request(struct ceph_osd_client *osdc,
816 struct ceph_osd_request *req)
817{
818 req->r_tid = ++osdc->last_tid;
819 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
820 dout("__register_request %p tid %lld\n", req, req->r_tid);
821 __insert_request(osdc, req);
822 ceph_osdc_get_request(req);
823 osdc->num_requests++;
824 if (osdc->num_requests == 1) {
825 dout(" first request, scheduling timeout\n");
826 __schedule_osd_timeout(osdc);
827 }
828}
829
830static void register_request(struct ceph_osd_client *osdc,
831 struct ceph_osd_request *req)
832{
833 mutex_lock(&osdc->request_mutex);
834 __register_request(osdc, req);
835 mutex_unlock(&osdc->request_mutex);
836}
837
838/*
839 * called under osdc->request_mutex
840 */
841static void __unregister_request(struct ceph_osd_client *osdc,
842 struct ceph_osd_request *req)
843{
844 if (RB_EMPTY_NODE(&req->r_node)) {
845 dout("__unregister_request %p tid %lld not registered\n",
846 req, req->r_tid);
847 return;
848 }
849
850 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
851 rb_erase(&req->r_node, &osdc->requests);
852 osdc->num_requests--;
853
854 if (req->r_osd) {
855 /* make sure the original request isn't in flight. */
856 ceph_con_revoke(&req->r_osd->o_con, req->r_request);
857
858 list_del_init(&req->r_osd_item);
859 if (list_empty(&req->r_osd->o_requests) &&
860 list_empty(&req->r_osd->o_linger_requests)) {
861 dout("moving osd to %p lru\n", req->r_osd);
862 __move_osd_to_lru(osdc, req->r_osd);
863 }
864 if (list_empty(&req->r_linger_item))
865 req->r_osd = NULL;
866 }
867
868 ceph_osdc_put_request(req);
869
870 list_del_init(&req->r_req_lru_item);
871 if (osdc->num_requests == 0) {
872 dout(" no requests, canceling timeout\n");
873 __cancel_osd_timeout(osdc);
874 }
875}
876
877/*
878 * Cancel a previously queued request message
879 */
880static void __cancel_request(struct ceph_osd_request *req)
881{
882 if (req->r_sent && req->r_osd) {
883 ceph_con_revoke(&req->r_osd->o_con, req->r_request);
884 req->r_sent = 0;
885 }
886}
887
888static void __register_linger_request(struct ceph_osd_client *osdc,
889 struct ceph_osd_request *req)
890{
891 dout("__register_linger_request %p\n", req);
892 list_add_tail(&req->r_linger_item, &osdc->req_linger);
893 list_add_tail(&req->r_linger_osd, &req->r_osd->o_linger_requests);
894}
895
896static void __unregister_linger_request(struct ceph_osd_client *osdc,
897 struct ceph_osd_request *req)
898{
899 dout("__unregister_linger_request %p\n", req);
900 if (req->r_osd) {
901 list_del_init(&req->r_linger_item);
902 list_del_init(&req->r_linger_osd);
903
904 if (list_empty(&req->r_osd->o_requests) &&
905 list_empty(&req->r_osd->o_linger_requests)) {
906 dout("moving osd to %p lru\n", req->r_osd);
907 __move_osd_to_lru(osdc, req->r_osd);
908 }
909 if (list_empty(&req->r_osd_item))
910 req->r_osd = NULL;
911 }
912}
913
914void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
915 struct ceph_osd_request *req)
916{
917 mutex_lock(&osdc->request_mutex);
918 if (req->r_linger) {
919 __unregister_linger_request(osdc, req);
920 ceph_osdc_put_request(req);
921 }
922 mutex_unlock(&osdc->request_mutex);
923}
924EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
925
926void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
927 struct ceph_osd_request *req)
928{
929 if (!req->r_linger) {
930 dout("set_request_linger %p\n", req);
931 req->r_linger = 1;
932 /*
933 * caller is now responsible for calling
934 * unregister_linger_request
935 */
936 ceph_osdc_get_request(req);
937 }
938}
939EXPORT_SYMBOL(ceph_osdc_set_request_linger);
940
941/*
942 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
943 * (as needed), and set the request r_osd appropriately. If there is
944 * no up osd, set r_osd to NULL. Move the request to the appropriate list
945 * (unsent, homeless) or leave on in-flight lru.
946 *
947 * Return 0 if unchanged, 1 if changed, or negative on error.
948 *
949 * Caller should hold map_sem for read and request_mutex.
950 */
951static int __map_request(struct ceph_osd_client *osdc,
952 struct ceph_osd_request *req, int force_resend)
953{
954 struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
955 struct ceph_pg pgid;
956 int acting[CEPH_PG_MAX_SIZE];
957 int o = -1, num = 0;
958 int err;
959
960 dout("map_request %p tid %lld\n", req, req->r_tid);
961 err = ceph_calc_object_layout(&reqhead->layout, req->r_oid,
962 &req->r_file_layout, osdc->osdmap);
963 if (err) {
964 list_move(&req->r_req_lru_item, &osdc->req_notarget);
965 return err;
966 }
967 pgid = reqhead->layout.ol_pgid;
968 req->r_pgid = pgid;
969
970 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
971 if (err > 0) {
972 o = acting[0];
973 num = err;
974 }
975
976 if ((!force_resend &&
977 req->r_osd && req->r_osd->o_osd == o &&
978 req->r_sent >= req->r_osd->o_incarnation &&
979 req->r_num_pg_osds == num &&
980 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
981 (req->r_osd == NULL && o == -1))
982 return 0; /* no change */
983
984 dout("map_request tid %llu pgid %d.%x osd%d (was osd%d)\n",
985 req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o,
986 req->r_osd ? req->r_osd->o_osd : -1);
987
988 /* record full pg acting set */
989 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
990 req->r_num_pg_osds = num;
991
992 if (req->r_osd) {
993 __cancel_request(req);
994 list_del_init(&req->r_osd_item);
995 req->r_osd = NULL;
996 }
997
998 req->r_osd = __lookup_osd(osdc, o);
999 if (!req->r_osd && o >= 0) {
1000 err = -ENOMEM;
1001 req->r_osd = create_osd(osdc);
1002 if (!req->r_osd) {
1003 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1004 goto out;
1005 }
1006
1007 dout("map_request osd %p is osd%d\n", req->r_osd, o);
1008 req->r_osd->o_osd = o;
1009 req->r_osd->o_con.peer_name.num = cpu_to_le64(o);
1010 __insert_osd(osdc, req->r_osd);
1011
1012 ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]);
1013 }
1014
1015 if (req->r_osd) {
1016 __remove_osd_from_lru(req->r_osd);
1017 list_add(&req->r_osd_item, &req->r_osd->o_requests);
1018 list_move(&req->r_req_lru_item, &osdc->req_unsent);
1019 } else {
1020 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1021 }
1022 err = 1; /* osd or pg changed */
1023
1024out:
1025 return err;
1026}
1027
1028/*
1029 * caller should hold map_sem (for read) and request_mutex
1030 */
1031static void __send_request(struct ceph_osd_client *osdc,
1032 struct ceph_osd_request *req)
1033{
1034 struct ceph_osd_request_head *reqhead;
1035
1036 dout("send_request %p tid %llu to osd%d flags %d\n",
1037 req, req->r_tid, req->r_osd->o_osd, req->r_flags);
1038
1039 reqhead = req->r_request->front.iov_base;
1040 reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch);
1041 reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */
1042 reqhead->reassert_version = req->r_reassert_version;
1043
1044 req->r_stamp = jiffies;
1045 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1046
1047 ceph_msg_get(req->r_request); /* send consumes a ref */
1048 ceph_con_send(&req->r_osd->o_con, req->r_request);
1049 req->r_sent = req->r_osd->o_incarnation;
1050}
1051
1052/*
1053 * Send any requests in the queue (req_unsent).
1054 */
1055static void send_queued(struct ceph_osd_client *osdc)
1056{
1057 struct ceph_osd_request *req, *tmp;
1058
1059 dout("send_queued\n");
1060 mutex_lock(&osdc->request_mutex);
1061 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) {
1062 __send_request(osdc, req);
1063 }
1064 mutex_unlock(&osdc->request_mutex);
1065}
1066
1067/*
1068 * Timeout callback, called every N seconds when 1 or more osd
1069 * requests has been active for more than N seconds. When this
1070 * happens, we ping all OSDs with requests who have timed out to
1071 * ensure any communications channel reset is detected. Reset the
1072 * request timeouts another N seconds in the future as we go.
1073 * Reschedule the timeout event another N seconds in future (unless
1074 * there are no open requests).
1075 */
1076static void handle_timeout(struct work_struct *work)
1077{
1078 struct ceph_osd_client *osdc =
1079 container_of(work, struct ceph_osd_client, timeout_work.work);
1080 struct ceph_osd_request *req, *last_req = NULL;
1081 struct ceph_osd *osd;
1082 unsigned long timeout = osdc->client->options->osd_timeout * HZ;
1083 unsigned long keepalive =
1084 osdc->client->options->osd_keepalive_timeout * HZ;
1085 unsigned long last_stamp = 0;
1086 struct list_head slow_osds;
1087 dout("timeout\n");
1088 down_read(&osdc->map_sem);
1089
1090 ceph_monc_request_next_osdmap(&osdc->client->monc);
1091
1092 mutex_lock(&osdc->request_mutex);
1093
1094 /*
1095 * reset osds that appear to be _really_ unresponsive. this
1096 * is a failsafe measure.. we really shouldn't be getting to
1097 * this point if the system is working properly. the monitors
1098 * should mark the osd as failed and we should find out about
1099 * it from an updated osd map.
1100 */
1101 while (timeout && !list_empty(&osdc->req_lru)) {
1102 req = list_entry(osdc->req_lru.next, struct ceph_osd_request,
1103 r_req_lru_item);
1104
1105 /* hasn't been long enough since we sent it? */
1106 if (time_before(jiffies, req->r_stamp + timeout))
1107 break;
1108
1109 /* hasn't been long enough since it was acked? */
1110 if (req->r_request->ack_stamp == 0 ||
1111 time_before(jiffies, req->r_request->ack_stamp + timeout))
1112 break;
1113
1114 BUG_ON(req == last_req && req->r_stamp == last_stamp);
1115 last_req = req;
1116 last_stamp = req->r_stamp;
1117
1118 osd = req->r_osd;
1119 BUG_ON(!osd);
1120 pr_warning(" tid %llu timed out on osd%d, will reset osd\n",
1121 req->r_tid, osd->o_osd);
1122 __kick_osd_requests(osdc, osd);
1123 }
1124
1125 /*
1126 * ping osds that are a bit slow. this ensures that if there
1127 * is a break in the TCP connection we will notice, and reopen
1128 * a connection with that osd (from the fault callback).
1129 */
1130 INIT_LIST_HEAD(&slow_osds);
1131 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
1132 if (time_before(jiffies, req->r_stamp + keepalive))
1133 break;
1134
1135 osd = req->r_osd;
1136 BUG_ON(!osd);
1137 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1138 req->r_tid, osd->o_osd);
1139 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1140 }
1141 while (!list_empty(&slow_osds)) {
1142 osd = list_entry(slow_osds.next, struct ceph_osd,
1143 o_keepalive_item);
1144 list_del_init(&osd->o_keepalive_item);
1145 ceph_con_keepalive(&osd->o_con);
1146 }
1147
1148 __schedule_osd_timeout(osdc);
1149 mutex_unlock(&osdc->request_mutex);
1150 send_queued(osdc);
1151 up_read(&osdc->map_sem);
1152}
1153
1154static void handle_osds_timeout(struct work_struct *work)
1155{
1156 struct ceph_osd_client *osdc =
1157 container_of(work, struct ceph_osd_client,
1158 osds_timeout_work.work);
1159 unsigned long delay =
1160 osdc->client->options->osd_idle_ttl * HZ >> 2;
1161
1162 dout("osds timeout\n");
1163 down_read(&osdc->map_sem);
1164 remove_old_osds(osdc);
1165 up_read(&osdc->map_sem);
1166
1167 schedule_delayed_work(&osdc->osds_timeout_work,
1168 round_jiffies_relative(delay));
1169}
1170
1171static void complete_request(struct ceph_osd_request *req)
1172{
1173 if (req->r_safe_callback)
1174 req->r_safe_callback(req, NULL);
1175 complete_all(&req->r_safe_completion); /* fsync waiter */
1176}
1177
1178/*
1179 * handle osd op reply. either call the callback if it is specified,
1180 * or do the completion to wake up the waiting thread.
1181 */
1182static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1183 struct ceph_connection *con)
1184{
1185 struct ceph_osd_reply_head *rhead = msg->front.iov_base;
1186 struct ceph_osd_request *req;
1187 u64 tid;
1188 int numops, object_len, flags;
1189 s32 result;
1190
1191 tid = le64_to_cpu(msg->hdr.tid);
1192 if (msg->front.iov_len < sizeof(*rhead))
1193 goto bad;
1194 numops = le32_to_cpu(rhead->num_ops);
1195 object_len = le32_to_cpu(rhead->object_len);
1196 result = le32_to_cpu(rhead->result);
1197 if (msg->front.iov_len != sizeof(*rhead) + object_len +
1198 numops * sizeof(struct ceph_osd_op))
1199 goto bad;
1200 dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result);
1201 /* lookup */
1202 mutex_lock(&osdc->request_mutex);
1203 req = __lookup_request(osdc, tid);
1204 if (req == NULL) {
1205 dout("handle_reply tid %llu dne\n", tid);
1206 mutex_unlock(&osdc->request_mutex);
1207 return;
1208 }
1209 ceph_osdc_get_request(req);
1210 flags = le32_to_cpu(rhead->flags);
1211
1212 /*
1213 * if this connection filled our message, drop our reference now, to
1214 * avoid a (safe but slower) revoke later.
1215 */
1216 if (req->r_con_filling_msg == con && req->r_reply == msg) {
1217 dout(" dropping con_filling_msg ref %p\n", con);
1218 req->r_con_filling_msg = NULL;
1219 con->ops->put(con);
1220 }
1221
1222 if (!req->r_got_reply) {
1223 unsigned int bytes;
1224
1225 req->r_result = le32_to_cpu(rhead->result);
1226 bytes = le32_to_cpu(msg->hdr.data_len);
1227 dout("handle_reply result %d bytes %d\n", req->r_result,
1228 bytes);
1229 if (req->r_result == 0)
1230 req->r_result = bytes;
1231
1232 /* in case this is a write and we need to replay, */
1233 req->r_reassert_version = rhead->reassert_version;
1234
1235 req->r_got_reply = 1;
1236 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1237 dout("handle_reply tid %llu dup ack\n", tid);
1238 mutex_unlock(&osdc->request_mutex);
1239 goto done;
1240 }
1241
1242 dout("handle_reply tid %llu flags %d\n", tid, flags);
1243
1244 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1245 __register_linger_request(osdc, req);
1246
1247 /* either this is a read, or we got the safe response */
1248 if (result < 0 ||
1249 (flags & CEPH_OSD_FLAG_ONDISK) ||
1250 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1251 __unregister_request(osdc, req);
1252
1253 mutex_unlock(&osdc->request_mutex);
1254
1255 if (req->r_callback)
1256 req->r_callback(req, msg);
1257 else
1258 complete_all(&req->r_completion);
1259
1260 if (flags & CEPH_OSD_FLAG_ONDISK)
1261 complete_request(req);
1262
1263done:
1264 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
1265 ceph_osdc_put_request(req);
1266 return;
1267
1268bad:
1269 pr_err("corrupt osd_op_reply got %d %d expected %d\n",
1270 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len),
1271 (int)sizeof(*rhead));
1272 ceph_msg_dump(msg);
1273}
1274
1275static void reset_changed_osds(struct ceph_osd_client *osdc)
1276{
1277 struct rb_node *p, *n;
1278
1279 for (p = rb_first(&osdc->osds); p; p = n) {
1280 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
1281
1282 n = rb_next(p);
1283 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1284 memcmp(&osd->o_con.peer_addr,
1285 ceph_osd_addr(osdc->osdmap,
1286 osd->o_osd),
1287 sizeof(struct ceph_entity_addr)) != 0)
1288 __reset_osd(osdc, osd);
1289 }
1290}
1291
1292/*
1293 * Requeue requests whose mapping to an OSD has changed. If requests map to
1294 * no osd, request a new map.
1295 *
1296 * Caller should hold map_sem for read and request_mutex.
1297 */
1298static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
1299{
1300 struct ceph_osd_request *req, *nreq;
1301 struct rb_node *p;
1302 int needmap = 0;
1303 int err;
1304
1305 dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
1306 mutex_lock(&osdc->request_mutex);
1307 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
1308 req = rb_entry(p, struct ceph_osd_request, r_node);
1309 err = __map_request(osdc, req, force_resend);
1310 if (err < 0)
1311 continue; /* error */
1312 if (req->r_osd == NULL) {
1313 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1314 needmap++; /* request a newer map */
1315 } else if (err > 0) {
1316 dout("%p tid %llu requeued on osd%d\n", req, req->r_tid,
1317 req->r_osd ? req->r_osd->o_osd : -1);
1318 if (!req->r_linger)
1319 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1320 }
1321 }
1322
1323 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1324 r_linger_item) {
1325 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1326
1327 err = __map_request(osdc, req, force_resend);
1328 if (err == 0)
1329 continue; /* no change and no osd was specified */
1330 if (err < 0)
1331 continue; /* hrm! */
1332 if (req->r_osd == NULL) {
1333 dout("tid %llu maps to no valid osd\n", req->r_tid);
1334 needmap++; /* request a newer map */
1335 continue;
1336 }
1337
1338 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1339 req->r_osd ? req->r_osd->o_osd : -1);
1340 __unregister_linger_request(osdc, req);
1341 __register_request(osdc, req);
1342 }
1343 mutex_unlock(&osdc->request_mutex);
1344
1345 if (needmap) {
1346 dout("%d requests for down osds, need new map\n", needmap);
1347 ceph_monc_request_next_osdmap(&osdc->client->monc);
1348 }
1349}
1350
1351
1352/*
1353 * Process updated osd map.
1354 *
1355 * The message contains any number of incremental and full maps, normally
1356 * indicating some sort of topology change in the cluster. Kick requests
1357 * off to different OSDs as needed.
1358 */
1359void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1360{
1361 void *p, *end, *next;
1362 u32 nr_maps, maplen;
1363 u32 epoch;
1364 struct ceph_osdmap *newmap = NULL, *oldmap;
1365 int err;
1366 struct ceph_fsid fsid;
1367
1368 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1369 p = msg->front.iov_base;
1370 end = p + msg->front.iov_len;
1371
1372 /* verify fsid */
1373 ceph_decode_need(&p, end, sizeof(fsid), bad);
1374 ceph_decode_copy(&p, &fsid, sizeof(fsid));
1375 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1376 return;
1377
1378 down_write(&osdc->map_sem);
1379
1380 /* incremental maps */
1381 ceph_decode_32_safe(&p, end, nr_maps, bad);
1382 dout(" %d inc maps\n", nr_maps);
1383 while (nr_maps > 0) {
1384 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1385 epoch = ceph_decode_32(&p);
1386 maplen = ceph_decode_32(&p);
1387 ceph_decode_need(&p, end, maplen, bad);
1388 next = p + maplen;
1389 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1390 dout("applying incremental map %u len %d\n",
1391 epoch, maplen);
1392 newmap = osdmap_apply_incremental(&p, next,
1393 osdc->osdmap,
1394 osdc->client->msgr);
1395 if (IS_ERR(newmap)) {
1396 err = PTR_ERR(newmap);
1397 goto bad;
1398 }
1399 BUG_ON(!newmap);
1400 if (newmap != osdc->osdmap) {
1401 ceph_osdmap_destroy(osdc->osdmap);
1402 osdc->osdmap = newmap;
1403 }
1404 kick_requests(osdc, 0);
1405 reset_changed_osds(osdc);
1406 } else {
1407 dout("ignoring incremental map %u len %d\n",
1408 epoch, maplen);
1409 }
1410 p = next;
1411 nr_maps--;
1412 }
1413 if (newmap)
1414 goto done;
1415
1416 /* full maps */
1417 ceph_decode_32_safe(&p, end, nr_maps, bad);
1418 dout(" %d full maps\n", nr_maps);
1419 while (nr_maps) {
1420 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1421 epoch = ceph_decode_32(&p);
1422 maplen = ceph_decode_32(&p);
1423 ceph_decode_need(&p, end, maplen, bad);
1424 if (nr_maps > 1) {
1425 dout("skipping non-latest full map %u len %d\n",
1426 epoch, maplen);
1427 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1428 dout("skipping full map %u len %d, "
1429 "older than our %u\n", epoch, maplen,
1430 osdc->osdmap->epoch);
1431 } else {
1432 int skipped_map = 0;
1433
1434 dout("taking full map %u len %d\n", epoch, maplen);
1435 newmap = osdmap_decode(&p, p+maplen);
1436 if (IS_ERR(newmap)) {
1437 err = PTR_ERR(newmap);
1438 goto bad;
1439 }
1440 BUG_ON(!newmap);
1441 oldmap = osdc->osdmap;
1442 osdc->osdmap = newmap;
1443 if (oldmap) {
1444 if (oldmap->epoch + 1 < newmap->epoch)
1445 skipped_map = 1;
1446 ceph_osdmap_destroy(oldmap);
1447 }
1448 kick_requests(osdc, skipped_map);
1449 }
1450 p += maplen;
1451 nr_maps--;
1452 }
1453
1454done:
1455 downgrade_write(&osdc->map_sem);
1456 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1457
1458 /*
1459 * subscribe to subsequent osdmap updates if full to ensure
1460 * we find out when we are no longer full and stop returning
1461 * ENOSPC.
1462 */
1463 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
1464 ceph_monc_request_next_osdmap(&osdc->client->monc);
1465
1466 send_queued(osdc);
1467 up_read(&osdc->map_sem);
1468 wake_up_all(&osdc->client->auth_wq);
1469 return;
1470
1471bad:
1472 pr_err("osdc handle_map corrupt msg\n");
1473 ceph_msg_dump(msg);
1474 up_write(&osdc->map_sem);
1475 return;
1476}
1477
1478/*
1479 * watch/notify callback event infrastructure
1480 *
1481 * These callbacks are used both for watch and notify operations.
1482 */
1483static void __release_event(struct kref *kref)
1484{
1485 struct ceph_osd_event *event =
1486 container_of(kref, struct ceph_osd_event, kref);
1487
1488 dout("__release_event %p\n", event);
1489 kfree(event);
1490}
1491
1492static void get_event(struct ceph_osd_event *event)
1493{
1494 kref_get(&event->kref);
1495}
1496
1497void ceph_osdc_put_event(struct ceph_osd_event *event)
1498{
1499 kref_put(&event->kref, __release_event);
1500}
1501EXPORT_SYMBOL(ceph_osdc_put_event);
1502
1503static void __insert_event(struct ceph_osd_client *osdc,
1504 struct ceph_osd_event *new)
1505{
1506 struct rb_node **p = &osdc->event_tree.rb_node;
1507 struct rb_node *parent = NULL;
1508 struct ceph_osd_event *event = NULL;
1509
1510 while (*p) {
1511 parent = *p;
1512 event = rb_entry(parent, struct ceph_osd_event, node);
1513 if (new->cookie < event->cookie)
1514 p = &(*p)->rb_left;
1515 else if (new->cookie > event->cookie)
1516 p = &(*p)->rb_right;
1517 else
1518 BUG();
1519 }
1520
1521 rb_link_node(&new->node, parent, p);
1522 rb_insert_color(&new->node, &osdc->event_tree);
1523}
1524
1525static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
1526 u64 cookie)
1527{
1528 struct rb_node **p = &osdc->event_tree.rb_node;
1529 struct rb_node *parent = NULL;
1530 struct ceph_osd_event *event = NULL;
1531
1532 while (*p) {
1533 parent = *p;
1534 event = rb_entry(parent, struct ceph_osd_event, node);
1535 if (cookie < event->cookie)
1536 p = &(*p)->rb_left;
1537 else if (cookie > event->cookie)
1538 p = &(*p)->rb_right;
1539 else
1540 return event;
1541 }
1542 return NULL;
1543}
1544
1545static void __remove_event(struct ceph_osd_event *event)
1546{
1547 struct ceph_osd_client *osdc = event->osdc;
1548
1549 if (!RB_EMPTY_NODE(&event->node)) {
1550 dout("__remove_event removed %p\n", event);
1551 rb_erase(&event->node, &osdc->event_tree);
1552 ceph_osdc_put_event(event);
1553 } else {
1554 dout("__remove_event didn't remove %p\n", event);
1555 }
1556}
1557
1558int ceph_osdc_create_event(struct ceph_osd_client *osdc,
1559 void (*event_cb)(u64, u64, u8, void *),
1560 int one_shot, void *data,
1561 struct ceph_osd_event **pevent)
1562{
1563 struct ceph_osd_event *event;
1564
1565 event = kmalloc(sizeof(*event), GFP_NOIO);
1566 if (!event)
1567 return -ENOMEM;
1568
1569 dout("create_event %p\n", event);
1570 event->cb = event_cb;
1571 event->one_shot = one_shot;
1572 event->data = data;
1573 event->osdc = osdc;
1574 INIT_LIST_HEAD(&event->osd_node);
1575 kref_init(&event->kref); /* one ref for us */
1576 kref_get(&event->kref); /* one ref for the caller */
1577 init_completion(&event->completion);
1578
1579 spin_lock(&osdc->event_lock);
1580 event->cookie = ++osdc->event_count;
1581 __insert_event(osdc, event);
1582 spin_unlock(&osdc->event_lock);
1583
1584 *pevent = event;
1585 return 0;
1586}
1587EXPORT_SYMBOL(ceph_osdc_create_event);
1588
1589void ceph_osdc_cancel_event(struct ceph_osd_event *event)
1590{
1591 struct ceph_osd_client *osdc = event->osdc;
1592
1593 dout("cancel_event %p\n", event);
1594 spin_lock(&osdc->event_lock);
1595 __remove_event(event);
1596 spin_unlock(&osdc->event_lock);
1597 ceph_osdc_put_event(event); /* caller's */
1598}
1599EXPORT_SYMBOL(ceph_osdc_cancel_event);
1600
1601
1602static void do_event_work(struct work_struct *work)
1603{
1604 struct ceph_osd_event_work *event_work =
1605 container_of(work, struct ceph_osd_event_work, work);
1606 struct ceph_osd_event *event = event_work->event;
1607 u64 ver = event_work->ver;
1608 u64 notify_id = event_work->notify_id;
1609 u8 opcode = event_work->opcode;
1610
1611 dout("do_event_work completing %p\n", event);
1612 event->cb(ver, notify_id, opcode, event->data);
1613 complete(&event->completion);
1614 dout("do_event_work completed %p\n", event);
1615 ceph_osdc_put_event(event);
1616 kfree(event_work);
1617}
1618
1619
1620/*
1621 * Process osd watch notifications
1622 */
1623void handle_watch_notify(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1624{
1625 void *p, *end;
1626 u8 proto_ver;
1627 u64 cookie, ver, notify_id;
1628 u8 opcode;
1629 struct ceph_osd_event *event;
1630 struct ceph_osd_event_work *event_work;
1631
1632 p = msg->front.iov_base;
1633 end = p + msg->front.iov_len;
1634
1635 ceph_decode_8_safe(&p, end, proto_ver, bad);
1636 ceph_decode_8_safe(&p, end, opcode, bad);
1637 ceph_decode_64_safe(&p, end, cookie, bad);
1638 ceph_decode_64_safe(&p, end, ver, bad);
1639 ceph_decode_64_safe(&p, end, notify_id, bad);
1640
1641 spin_lock(&osdc->event_lock);
1642 event = __find_event(osdc, cookie);
1643 if (event) {
1644 get_event(event);
1645 if (event->one_shot)
1646 __remove_event(event);
1647 }
1648 spin_unlock(&osdc->event_lock);
1649 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
1650 cookie, ver, event);
1651 if (event) {
1652 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
1653 if (!event_work) {
1654 dout("ERROR: could not allocate event_work\n");
1655 goto done_err;
1656 }
1657 INIT_WORK(&event_work->work, do_event_work);
1658 event_work->event = event;
1659 event_work->ver = ver;
1660 event_work->notify_id = notify_id;
1661 event_work->opcode = opcode;
1662 if (!queue_work(osdc->notify_wq, &event_work->work)) {
1663 dout("WARNING: failed to queue notify event work\n");
1664 goto done_err;
1665 }
1666 }
1667
1668 return;
1669
1670done_err:
1671 complete(&event->completion);
1672 ceph_osdc_put_event(event);
1673 return;
1674
1675bad:
1676 pr_err("osdc handle_watch_notify corrupt msg\n");
1677 return;
1678}
1679
1680int ceph_osdc_wait_event(struct ceph_osd_event *event, unsigned long timeout)
1681{
1682 int err;
1683
1684 dout("wait_event %p\n", event);
1685 err = wait_for_completion_interruptible_timeout(&event->completion,
1686 timeout * HZ);
1687 ceph_osdc_put_event(event);
1688 if (err > 0)
1689 err = 0;
1690 dout("wait_event %p returns %d\n", event, err);
1691 return err;
1692}
1693EXPORT_SYMBOL(ceph_osdc_wait_event);
1694
1695/*
1696 * Register request, send initial attempt.
1697 */
1698int ceph_osdc_start_request(struct ceph_osd_client *osdc,
1699 struct ceph_osd_request *req,
1700 bool nofail)
1701{
1702 int rc = 0;
1703
1704 req->r_request->pages = req->r_pages;
1705 req->r_request->nr_pages = req->r_num_pages;
1706#ifdef CONFIG_BLOCK
1707 req->r_request->bio = req->r_bio;
1708#endif
1709 req->r_request->trail = req->r_trail;
1710
1711 register_request(osdc, req);
1712
1713 down_read(&osdc->map_sem);
1714 mutex_lock(&osdc->request_mutex);
1715 /*
1716 * a racing kick_requests() may have sent the message for us
1717 * while we dropped request_mutex above, so only send now if
1718 * the request still han't been touched yet.
1719 */
1720 if (req->r_sent == 0) {
1721 rc = __map_request(osdc, req, 0);
1722 if (rc < 0) {
1723 if (nofail) {
1724 dout("osdc_start_request failed map, "
1725 " will retry %lld\n", req->r_tid);
1726 rc = 0;
1727 }
1728 goto out_unlock;
1729 }
1730 if (req->r_osd == NULL) {
1731 dout("send_request %p no up osds in pg\n", req);
1732 ceph_monc_request_next_osdmap(&osdc->client->monc);
1733 } else {
1734 __send_request(osdc, req);
1735 }
1736 rc = 0;
1737 }
1738
1739out_unlock:
1740 mutex_unlock(&osdc->request_mutex);
1741 up_read(&osdc->map_sem);
1742 return rc;
1743}
1744EXPORT_SYMBOL(ceph_osdc_start_request);
1745
1746/*
1747 * wait for a request to complete
1748 */
1749int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
1750 struct ceph_osd_request *req)
1751{
1752 int rc;
1753
1754 rc = wait_for_completion_interruptible(&req->r_completion);
1755 if (rc < 0) {
1756 mutex_lock(&osdc->request_mutex);
1757 __cancel_request(req);
1758 __unregister_request(osdc, req);
1759 mutex_unlock(&osdc->request_mutex);
1760 complete_request(req);
1761 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
1762 return rc;
1763 }
1764
1765 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
1766 return req->r_result;
1767}
1768EXPORT_SYMBOL(ceph_osdc_wait_request);
1769
1770/*
1771 * sync - wait for all in-flight requests to flush. avoid starvation.
1772 */
1773void ceph_osdc_sync(struct ceph_osd_client *osdc)
1774{
1775 struct ceph_osd_request *req;
1776 u64 last_tid, next_tid = 0;
1777
1778 mutex_lock(&osdc->request_mutex);
1779 last_tid = osdc->last_tid;
1780 while (1) {
1781 req = __lookup_request_ge(osdc, next_tid);
1782 if (!req)
1783 break;
1784 if (req->r_tid > last_tid)
1785 break;
1786
1787 next_tid = req->r_tid + 1;
1788 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
1789 continue;
1790
1791 ceph_osdc_get_request(req);
1792 mutex_unlock(&osdc->request_mutex);
1793 dout("sync waiting on tid %llu (last is %llu)\n",
1794 req->r_tid, last_tid);
1795 wait_for_completion(&req->r_safe_completion);
1796 mutex_lock(&osdc->request_mutex);
1797 ceph_osdc_put_request(req);
1798 }
1799 mutex_unlock(&osdc->request_mutex);
1800 dout("sync done (thru tid %llu)\n", last_tid);
1801}
1802EXPORT_SYMBOL(ceph_osdc_sync);
1803
1804/*
1805 * init, shutdown
1806 */
1807int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
1808{
1809 int err;
1810
1811 dout("init\n");
1812 osdc->client = client;
1813 osdc->osdmap = NULL;
1814 init_rwsem(&osdc->map_sem);
1815 init_completion(&osdc->map_waiters);
1816 osdc->last_requested_map = 0;
1817 mutex_init(&osdc->request_mutex);
1818 osdc->last_tid = 0;
1819 osdc->osds = RB_ROOT;
1820 INIT_LIST_HEAD(&osdc->osd_lru);
1821 osdc->requests = RB_ROOT;
1822 INIT_LIST_HEAD(&osdc->req_lru);
1823 INIT_LIST_HEAD(&osdc->req_unsent);
1824 INIT_LIST_HEAD(&osdc->req_notarget);
1825 INIT_LIST_HEAD(&osdc->req_linger);
1826 osdc->num_requests = 0;
1827 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
1828 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
1829 spin_lock_init(&osdc->event_lock);
1830 osdc->event_tree = RB_ROOT;
1831 osdc->event_count = 0;
1832
1833 schedule_delayed_work(&osdc->osds_timeout_work,
1834 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
1835
1836 err = -ENOMEM;
1837 osdc->req_mempool = mempool_create_kmalloc_pool(10,
1838 sizeof(struct ceph_osd_request));
1839 if (!osdc->req_mempool)
1840 goto out;
1841
1842 err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true,
1843 "osd_op");
1844 if (err < 0)
1845 goto out_mempool;
1846 err = ceph_msgpool_init(&osdc->msgpool_op_reply,
1847 OSD_OPREPLY_FRONT_LEN, 10, true,
1848 "osd_op_reply");
1849 if (err < 0)
1850 goto out_msgpool;
1851
1852 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
1853 if (IS_ERR(osdc->notify_wq)) {
1854 err = PTR_ERR(osdc->notify_wq);
1855 osdc->notify_wq = NULL;
1856 goto out_msgpool;
1857 }
1858 return 0;
1859
1860out_msgpool:
1861 ceph_msgpool_destroy(&osdc->msgpool_op);
1862out_mempool:
1863 mempool_destroy(osdc->req_mempool);
1864out:
1865 return err;
1866}
1867EXPORT_SYMBOL(ceph_osdc_init);
1868
1869void ceph_osdc_stop(struct ceph_osd_client *osdc)
1870{
1871 flush_workqueue(osdc->notify_wq);
1872 destroy_workqueue(osdc->notify_wq);
1873 cancel_delayed_work_sync(&osdc->timeout_work);
1874 cancel_delayed_work_sync(&osdc->osds_timeout_work);
1875 if (osdc->osdmap) {
1876 ceph_osdmap_destroy(osdc->osdmap);
1877 osdc->osdmap = NULL;
1878 }
1879 remove_all_osds(osdc);
1880 mempool_destroy(osdc->req_mempool);
1881 ceph_msgpool_destroy(&osdc->msgpool_op);
1882 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
1883}
1884EXPORT_SYMBOL(ceph_osdc_stop);
1885
1886/*
1887 * Read some contiguous pages. If we cross a stripe boundary, shorten
1888 * *plen. Return number of bytes read, or error.
1889 */
1890int ceph_osdc_readpages(struct ceph_osd_client *osdc,
1891 struct ceph_vino vino, struct ceph_file_layout *layout,
1892 u64 off, u64 *plen,
1893 u32 truncate_seq, u64 truncate_size,
1894 struct page **pages, int num_pages, int page_align)
1895{
1896 struct ceph_osd_request *req;
1897 int rc = 0;
1898
1899 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
1900 vino.snap, off, *plen);
1901 req = ceph_osdc_new_request(osdc, layout, vino, off, plen,
1902 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
1903 NULL, 0, truncate_seq, truncate_size, NULL,
1904 false, 1, page_align);
1905 if (!req)
1906 return -ENOMEM;
1907
1908 /* it may be a short read due to an object boundary */
1909 req->r_pages = pages;
1910
1911 dout("readpages final extent is %llu~%llu (%d pages align %d)\n",
1912 off, *plen, req->r_num_pages, page_align);
1913
1914 rc = ceph_osdc_start_request(osdc, req, false);
1915 if (!rc)
1916 rc = ceph_osdc_wait_request(osdc, req);
1917
1918 ceph_osdc_put_request(req);
1919 dout("readpages result %d\n", rc);
1920 return rc;
1921}
1922EXPORT_SYMBOL(ceph_osdc_readpages);
1923
1924/*
1925 * do a synchronous write on N pages
1926 */
1927int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
1928 struct ceph_file_layout *layout,
1929 struct ceph_snap_context *snapc,
1930 u64 off, u64 len,
1931 u32 truncate_seq, u64 truncate_size,
1932 struct timespec *mtime,
1933 struct page **pages, int num_pages,
1934 int flags, int do_sync, bool nofail)
1935{
1936 struct ceph_osd_request *req;
1937 int rc = 0;
1938 int page_align = off & ~PAGE_MASK;
1939
1940 BUG_ON(vino.snap != CEPH_NOSNAP);
1941 req = ceph_osdc_new_request(osdc, layout, vino, off, &len,
1942 CEPH_OSD_OP_WRITE,
1943 flags | CEPH_OSD_FLAG_ONDISK |
1944 CEPH_OSD_FLAG_WRITE,
1945 snapc, do_sync,
1946 truncate_seq, truncate_size, mtime,
1947 nofail, 1, page_align);
1948 if (!req)
1949 return -ENOMEM;
1950
1951 /* it may be a short write due to an object boundary */
1952 req->r_pages = pages;
1953 dout("writepages %llu~%llu (%d pages)\n", off, len,
1954 req->r_num_pages);
1955
1956 rc = ceph_osdc_start_request(osdc, req, nofail);
1957 if (!rc)
1958 rc = ceph_osdc_wait_request(osdc, req);
1959
1960 ceph_osdc_put_request(req);
1961 if (rc == 0)
1962 rc = len;
1963 dout("writepages result %d\n", rc);
1964 return rc;
1965}
1966EXPORT_SYMBOL(ceph_osdc_writepages);
1967
1968/*
1969 * handle incoming message
1970 */
1971static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
1972{
1973 struct ceph_osd *osd = con->private;
1974 struct ceph_osd_client *osdc;
1975 int type = le16_to_cpu(msg->hdr.type);
1976
1977 if (!osd)
1978 goto out;
1979 osdc = osd->o_osdc;
1980
1981 switch (type) {
1982 case CEPH_MSG_OSD_MAP:
1983 ceph_osdc_handle_map(osdc, msg);
1984 break;
1985 case CEPH_MSG_OSD_OPREPLY:
1986 handle_reply(osdc, msg, con);
1987 break;
1988 case CEPH_MSG_WATCH_NOTIFY:
1989 handle_watch_notify(osdc, msg);
1990 break;
1991
1992 default:
1993 pr_err("received unknown message type %d %s\n", type,
1994 ceph_msg_type_name(type));
1995 }
1996out:
1997 ceph_msg_put(msg);
1998}
1999
2000/*
2001 * lookup and return message for incoming reply. set up reply message
2002 * pages.
2003 */
2004static struct ceph_msg *get_reply(struct ceph_connection *con,
2005 struct ceph_msg_header *hdr,
2006 int *skip)
2007{
2008 struct ceph_osd *osd = con->private;
2009 struct ceph_osd_client *osdc = osd->o_osdc;
2010 struct ceph_msg *m;
2011 struct ceph_osd_request *req;
2012 int front = le32_to_cpu(hdr->front_len);
2013 int data_len = le32_to_cpu(hdr->data_len);
2014 u64 tid;
2015
2016 tid = le64_to_cpu(hdr->tid);
2017 mutex_lock(&osdc->request_mutex);
2018 req = __lookup_request(osdc, tid);
2019 if (!req) {
2020 *skip = 1;
2021 m = NULL;
2022 pr_info("get_reply unknown tid %llu from osd%d\n", tid,
2023 osd->o_osd);
2024 goto out;
2025 }
2026
2027 if (req->r_con_filling_msg) {
2028 dout("get_reply revoking msg %p from old con %p\n",
2029 req->r_reply, req->r_con_filling_msg);
2030 ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply);
2031 req->r_con_filling_msg->ops->put(req->r_con_filling_msg);
2032 req->r_con_filling_msg = NULL;
2033 }
2034
2035 if (front > req->r_reply->front.iov_len) {
2036 pr_warning("get_reply front %d > preallocated %d\n",
2037 front, (int)req->r_reply->front.iov_len);
2038 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
2039 if (!m)
2040 goto out;
2041 ceph_msg_put(req->r_reply);
2042 req->r_reply = m;
2043 }
2044 m = ceph_msg_get(req->r_reply);
2045
2046 if (data_len > 0) {
2047 int want = calc_pages_for(req->r_page_alignment, data_len);
2048
2049 if (unlikely(req->r_num_pages < want)) {
2050 pr_warning("tid %lld reply has %d bytes %d pages, we"
2051 " had only %d pages ready\n", tid, data_len,
2052 want, req->r_num_pages);
2053 *skip = 1;
2054 ceph_msg_put(m);
2055 m = NULL;
2056 goto out;
2057 }
2058 m->pages = req->r_pages;
2059 m->nr_pages = req->r_num_pages;
2060 m->page_alignment = req->r_page_alignment;
2061#ifdef CONFIG_BLOCK
2062 m->bio = req->r_bio;
2063#endif
2064 }
2065 *skip = 0;
2066 req->r_con_filling_msg = con->ops->get(con);
2067 dout("get_reply tid %lld %p\n", tid, m);
2068
2069out:
2070 mutex_unlock(&osdc->request_mutex);
2071 return m;
2072
2073}
2074
2075static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2076 struct ceph_msg_header *hdr,
2077 int *skip)
2078{
2079 struct ceph_osd *osd = con->private;
2080 int type = le16_to_cpu(hdr->type);
2081 int front = le32_to_cpu(hdr->front_len);
2082
2083 switch (type) {
2084 case CEPH_MSG_OSD_MAP:
2085 case CEPH_MSG_WATCH_NOTIFY:
2086 return ceph_msg_new(type, front, GFP_NOFS, false);
2087 case CEPH_MSG_OSD_OPREPLY:
2088 return get_reply(con, hdr, skip);
2089 default:
2090 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2091 osd->o_osd);
2092 *skip = 1;
2093 return NULL;
2094 }
2095}
2096
2097/*
2098 * Wrappers to refcount containing ceph_osd struct
2099 */
2100static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2101{
2102 struct ceph_osd *osd = con->private;
2103 if (get_osd(osd))
2104 return con;
2105 return NULL;
2106}
2107
2108static void put_osd_con(struct ceph_connection *con)
2109{
2110 struct ceph_osd *osd = con->private;
2111 put_osd(osd);
2112}
2113
2114/*
2115 * authentication
2116 */
2117/*
2118 * Note: returned pointer is the address of a structure that's
2119 * managed separately. Caller must *not* attempt to free it.
2120 */
2121static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
2122 int *proto, int force_new)
2123{
2124 struct ceph_osd *o = con->private;
2125 struct ceph_osd_client *osdc = o->o_osdc;
2126 struct ceph_auth_client *ac = osdc->client->monc.auth;
2127 struct ceph_auth_handshake *auth = &o->o_auth;
2128
2129 if (force_new && auth->authorizer) {
2130 if (ac->ops && ac->ops->destroy_authorizer)
2131 ac->ops->destroy_authorizer(ac, auth->authorizer);
2132 auth->authorizer = NULL;
2133 }
2134 if (!auth->authorizer && ac->ops && ac->ops->create_authorizer) {
2135 int ret = ac->ops->create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2136 auth);
2137 if (ret)
2138 return ERR_PTR(ret);
2139 }
2140 *proto = ac->protocol;
2141
2142 return auth;
2143}
2144
2145
2146static int verify_authorizer_reply(struct ceph_connection *con, int len)
2147{
2148 struct ceph_osd *o = con->private;
2149 struct ceph_osd_client *osdc = o->o_osdc;
2150 struct ceph_auth_client *ac = osdc->client->monc.auth;
2151
2152 /*
2153 * XXX If ac->ops or ac->ops->verify_authorizer_reply is null,
2154 * XXX which do we do: succeed or fail?
2155 */
2156 return ac->ops->verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2157}
2158
2159static int invalidate_authorizer(struct ceph_connection *con)
2160{
2161 struct ceph_osd *o = con->private;
2162 struct ceph_osd_client *osdc = o->o_osdc;
2163 struct ceph_auth_client *ac = osdc->client->monc.auth;
2164
2165 if (ac->ops && ac->ops->invalidate_authorizer)
2166 ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2167
2168 return ceph_monc_validate_auth(&osdc->client->monc);
2169}
2170
2171static const struct ceph_connection_operations osd_con_ops = {
2172 .get = get_osd_con,
2173 .put = put_osd_con,
2174 .dispatch = dispatch,
2175 .get_authorizer = get_authorizer,
2176 .verify_authorizer_reply = verify_authorizer_reply,
2177 .invalidate_authorizer = invalidate_authorizer,
2178 .alloc_msg = alloc_msg,
2179 .fault = osd_reset,
2180};