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ceph: don't try fill file_lock on unsuccessful GETFILELOCK reply
[linux-2.6-block.git] / net / ceph / osd_client.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
a4ce40a9 2
3d14c5d2 3#include <linux/ceph/ceph_debug.h>
f24e9980 4
3d14c5d2 5#include <linux/module.h>
f24e9980
SW		 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>
68b4476b
YS		 12#ifdef CONFIG_BLOCK
13#include <linux/bio.h>
14#endif
f24e9980 15
8cb441c0 16#include <linux/ceph/ceph_features.h>
3d14c5d2
YS		 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>
08c1ac50 23#include <linux/ceph/striper.h>
f24e9980 24
c16e7869 25#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 26
5522ae0b
AE		 27static struct kmem_cache *ceph_osd_request_cache;
28
9e32789f 29static const struct ceph_connection_operations osd_con_ops;
f24e9980 30
f24e9980
SW		 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
5aea3dcd
ID		 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);
922dab61
ID		 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);
a02a946d 55static void clear_backoffs(struct ceph_osd *osd);
5aea3dcd
ID		 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}
922dab61
ID		 85static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
86{
87 WARN_ON(!mutex_is_locked(&lreq->lock));
88}
5aea3dcd
ID		 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) { }
922dab61 93static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
5aea3dcd
ID		 94#endif
95
f24e9980
SW		 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 */
dbe0fc41 103static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 104 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 105{
60e56f13 106 u64 orig_len = *plen;
dccbf080 107 u32 xlen;
f24e9980 108
60e56f13 109 /* object extent? */
dccbf080
ID		 110 ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
111 objoff, &xlen);
112 *objlen = xlen;
75d1c941
AE		 113 if (*objlen < orig_len) {
114 *plen = *objlen;
60e56f13
AE		 115 dout(" skipping last %llu, final file extent %llu~%llu\n",
116 orig_len - *plen, off, *plen);
117 }
118
75d1c941 119 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
3ff5f385 120 return 0;
f24e9980
SW		 121}
122
c54d47bf
AE		 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
89486833
ID		 129/*
130 * Consumes @pages if @own_pages is true.
131 */
a4ce40a9 132static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 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}
43bfe5de 143
89486833
ID		 144/*
145 * Consumes a ref on @pagelist.
146 */
a4ce40a9 147static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 148 struct ceph_pagelist *pagelist)
149{
150 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
151 osd_data->pagelist = pagelist;
152}
43bfe5de
AE		 153
154#ifdef CONFIG_BLOCK
a4ce40a9 155static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
5359a17d
ID		 156 struct ceph_bio_iter *bio_pos,
157 u32 bio_length)
43bfe5de
AE		 158{
159 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
5359a17d 160 osd_data->bio_pos = *bio_pos;
43bfe5de
AE		 161 osd_data->bio_length = bio_length;
162}
43bfe5de
AE		 163#endif /* CONFIG_BLOCK */
164
b9e281c2 165static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
0010f705
ID		 166 struct ceph_bvec_iter *bvec_pos,
167 u32 num_bvecs)
b9e281c2
ID		 168{
169 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
170 osd_data->bvec_pos = *bvec_pos;
0010f705 171 osd_data->num_bvecs = num_bvecs;
b9e281c2
ID		 172}
173
49719778
AE		 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
a4ce40a9
AE		 182struct ceph_osd_data *
183osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 184 unsigned int which)
a4ce40a9 185{
863c7eb5 186 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 187}
188EXPORT_SYMBOL(osd_req_op_extent_osd_data);
189
49719778
AE		 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
a4ce40a9 203void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 204 unsigned int which, struct page **pages,
205 u64 length, u32 alignment,
a4ce40a9
AE		 206 bool pages_from_pool, bool own_pages)
207{
208 struct ceph_osd_data *osd_data;
209
863c7eb5 210 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 211 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
212 pages_from_pool, own_pages);
a4ce40a9
AE		 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,
406e2c9f 217 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 218{
219 struct ceph_osd_data *osd_data;
220
863c7eb5 221 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 222 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 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,
5359a17d
ID		 228 unsigned int which,
229 struct ceph_bio_iter *bio_pos,
230 u32 bio_length)
a4ce40a9
AE		 231{
232 struct ceph_osd_data *osd_data;
863c7eb5
AE		 233
234 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
5359a17d 235 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
a4ce40a9
AE		 236}
237EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
238#endif /* CONFIG_BLOCK */
239
0010f705
ID		 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
b9e281c2
ID		 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);
0010f705 263 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
b9e281c2
ID		 264}
265EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
266
a4ce40a9
AE		 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
863c7eb5 273 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 274 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 275}
276
04017e29
AE		 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
863c7eb5 283 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29 284 ceph_osd_data_pagelist_init(osd_data, pagelist);
bb873b53
ID		 285 osd_req->r_ops[which].cls.indata_len += pagelist->length;
286 osd_req->r_ops[which].indata_len += pagelist->length;
04017e29
AE		 287}
288EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
289
6c57b554
AE		 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);
bb873b53
ID		 299 osd_req->r_ops[which].cls.indata_len += length;
300 osd_req->r_ops[which].indata_len += length;
6c57b554
AE		 301}
302EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
303
b9e281c2
ID		 304void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
305 unsigned int which,
0010f705
ID		 306 struct bio_vec *bvecs, u32 num_bvecs,
307 u32 bytes)
b9e281c2
ID		 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);
0010f705 316 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
b9e281c2
ID		 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
a4ce40a9
AE		 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
863c7eb5 328 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 329 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
330 pages_from_pool, own_pages);
a4ce40a9
AE		 331}
332EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
333
23c08a9c
AE		 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 */
b9e281c2
ID		 347 case CEPH_OSD_DATA_TYPE_BVECS:
348 return osd_data->bvec_pos.iter.bi_size;
23c08a9c
AE		 349 default:
350 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
351 return 0;
352 }
353}
354
c54d47bf
AE		 355static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
356{
5476492f 357 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 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);
89486833
ID		 363 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
364 ceph_pagelist_release(osd_data->pagelist);
c54d47bf 365 }
5476492f
AE		 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:
e30b7577 380 case CEPH_OSD_OP_WRITEFULL:
5476492f
AE		 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);
04017e29 385 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 386 ceph_osd_data_release(&op->cls.response_data);
387 break;
d74b50be
YZ		 388 case CEPH_OSD_OP_SETXATTR:
389 case CEPH_OSD_OP_CMPXATTR:
390 ceph_osd_data_release(&op->xattr.osd_data);
391 break;
66ba609f
YZ		 392 case CEPH_OSD_OP_STAT:
393 ceph_osd_data_release(&op->raw_data_in);
394 break;
922dab61
ID		 395 case CEPH_OSD_OP_NOTIFY_ACK:
396 ceph_osd_data_release(&op->notify_ack.request_data);
397 break;
19079203
ID		 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;
a4ed38d7
DF		 402 case CEPH_OSD_OP_LIST_WATCHERS:
403 ceph_osd_data_release(&op->list_watchers.response_data);
404 break;
23ddf9be
LH		 405 case CEPH_OSD_OP_COPY_FROM:
406 ceph_osd_data_release(&op->copy_from.osd_data);
407 break;
5476492f
AE		 408 default:
409 break;
410 }
c54d47bf
AE		 411}
412
63244fa1
ID		 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
922dab61
ID		 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 */
dc98ff72 440 dest->spgid = src->spgid; /* struct */
922dab61
ID		 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
449 dest->flags = src->flags;
450 dest->paused = src->paused;
451
04c7d789 452 dest->epoch = src->epoch;
dc93e0e2
ID		 453 dest->last_force_resend = src->last_force_resend;
454
922dab61
ID		 455 dest->osd = src->osd;
456}
457
63244fa1
ID		 458static void target_destroy(struct ceph_osd_request_target *t)
459{
460 ceph_oid_destroy(&t->base_oid);
30c156d9 461 ceph_oloc_destroy(&t->base_oloc);
63244fa1 462 ceph_oid_destroy(&t->target_oid);
30c156d9 463 ceph_oloc_destroy(&t->target_oloc);
63244fa1
ID		 464}
465
f24e9980
SW		 466/*
467 * requests
468 */
3540bfdb
ID		 469static void request_release_checks(struct ceph_osd_request *req)
470{
471 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
4609245e 472 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
94e85771 473 WARN_ON(!list_empty(&req->r_private_item));
3540bfdb
ID		 474 WARN_ON(req->r_osd);
475}
476
9e94af20 477static void ceph_osdc_release_request(struct kref *kref)
f24e9980 478{
9e94af20
ID		 479 struct ceph_osd_request *req = container_of(kref,
480 struct ceph_osd_request, r_kref);
5476492f 481 unsigned int which;
415e49a9 482
9e94af20
ID		 483 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
484 req->r_request, req->r_reply);
3540bfdb 485 request_release_checks(req);
9e94af20 486
415e49a9
SW		 487 if (req->r_request)
488 ceph_msg_put(req->r_request);
5aea3dcd 489 if (req->r_reply)
ab8cb34a 490 ceph_msg_put(req->r_reply);
0fff87ec 491
5476492f
AE		 492 for (which = 0; which < req->r_num_ops; which++)
493 osd_req_op_data_release(req, which);
0fff87ec 494
a66dd383 495 target_destroy(&req->r_t);
415e49a9 496 ceph_put_snap_context(req->r_snapc);
d30291b9 497
415e49a9
SW		 498 if (req->r_mempool)
499 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 500 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 501 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 502 else
503 kfree(req);
f24e9980 504}
9e94af20
ID		 505
506void ceph_osdc_get_request(struct ceph_osd_request *req)
507{
508 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 509 kref_read(&req->r_kref));
9e94af20
ID		 510 kref_get(&req->r_kref);
511}
512EXPORT_SYMBOL(ceph_osdc_get_request);
513
514void ceph_osdc_put_request(struct ceph_osd_request *req)
515{
3ed97d63
ID		 516 if (req) {
517 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 518 kref_read(&req->r_kref));
3ed97d63
ID		 519 kref_put(&req->r_kref, ceph_osdc_release_request);
520 }
9e94af20
ID		 521}
522EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 523
3540bfdb
ID		 524static void request_init(struct ceph_osd_request *req)
525{
526 /* req only, each op is zeroed in _osd_req_op_init() */
527 memset(req, 0, sizeof(*req));
528
529 kref_init(&req->r_kref);
530 init_completion(&req->r_completion);
3540bfdb 531 RB_CLEAR_NODE(&req->r_node);
4609245e 532 RB_CLEAR_NODE(&req->r_mc_node);
94e85771 533 INIT_LIST_HEAD(&req->r_private_item);
3540bfdb
ID		 534
535 target_init(&req->r_t);
536}
537
922dab61
ID		 538/*
539 * This is ugly, but it allows us to reuse linger registration and ping
540 * requests, keeping the structure of the code around send_linger{_ping}()
541 * reasonable. Setting up a min_nr=2 mempool for each linger request
542 * and dealing with copying ops (this blasts req only, watch op remains
543 * intact) isn't any better.
544 */
545static void request_reinit(struct ceph_osd_request *req)
546{
547 struct ceph_osd_client *osdc = req->r_osdc;
548 bool mempool = req->r_mempool;
549 unsigned int num_ops = req->r_num_ops;
550 u64 snapid = req->r_snapid;
551 struct ceph_snap_context *snapc = req->r_snapc;
552 bool linger = req->r_linger;
553 struct ceph_msg *request_msg = req->r_request;
554 struct ceph_msg *reply_msg = req->r_reply;
555
556 dout("%s req %p\n", __func__, req);
2c935bc5 557 WARN_ON(kref_read(&req->r_kref) != 1);
922dab61
ID		 558 request_release_checks(req);
559
2c935bc5
PZ		 560 WARN_ON(kref_read(&request_msg->kref) != 1);
561 WARN_ON(kref_read(&reply_msg->kref) != 1);
922dab61
ID		 562 target_destroy(&req->r_t);
563
564 request_init(req);
565 req->r_osdc = osdc;
566 req->r_mempool = mempool;
567 req->r_num_ops = num_ops;
568 req->r_snapid = snapid;
569 req->r_snapc = snapc;
570 req->r_linger = linger;
571 req->r_request = request_msg;
572 req->r_reply = reply_msg;
573}
574
3499e8a5 575struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 576 struct ceph_snap_context *snapc,
1b83bef2 577 unsigned int num_ops,
3499e8a5 578 bool use_mempool,
54a54007 579 gfp_t gfp_flags)
f24e9980
SW		 580{
581 struct ceph_osd_request *req;
1b83bef2 582
f24e9980 583 if (use_mempool) {
3f1af42a 584 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 585 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 586 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
587 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 588 } else {
3f1af42a 589 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
acafe7e3 590 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
f24e9980 591 }
3f1af42a 592 if (unlikely(!req))
a79832f2 593 return NULL;
f24e9980 594
3540bfdb 595 request_init(req);
f24e9980
SW		 596 req->r_osdc = osdc;
597 req->r_mempool = use_mempool;
79528734 598 req->r_num_ops = num_ops;
84127282
ID		 599 req->r_snapid = CEPH_NOSNAP;
600 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 601
13d1ad16
ID		 602 dout("%s req %p\n", __func__, req);
603 return req;
604}
605EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 606
2e59ffd1 607static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
30c156d9
YZ		 608{
609 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
610}
611
0d9c1ab3
ID		 612static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
613 int num_request_data_items,
614 int num_reply_data_items)
13d1ad16
ID		 615{
616 struct ceph_osd_client *osdc = req->r_osdc;
617 struct ceph_msg *msg;
618 int msg_size;
c16e7869 619
0d9c1ab3 620 WARN_ON(req->r_request || req->r_reply);
d30291b9 621 WARN_ON(ceph_oid_empty(&req->r_base_oid));
30c156d9 622 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
d30291b9 623
13d1ad16 624 /* create request message */
8cb441c0
ID		 625 msg_size = CEPH_ENCODING_START_BLK_LEN +
626 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
627 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
628 msg_size += CEPH_ENCODING_START_BLK_LEN +
629 sizeof(struct ceph_osd_reqid); /* reqid */
630 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
631 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
30c156d9
YZ		 632 msg_size += CEPH_ENCODING_START_BLK_LEN +
633 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
13d1ad16
ID		 634 msg_size += 4 + req->r_base_oid.name_len; /* oid */
635 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 636 msg_size += 8; /* snapid */
637 msg_size += 8; /* snap_seq */
13d1ad16 638 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
8cb441c0 639 msg_size += 4 + 8; /* retry_attempt, features */
ae458f5a 640
13d1ad16 641 if (req->r_mempool)
0d9c1ab3
ID		 642 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
643 num_request_data_items);
f24e9980 644 else
0d9c1ab3
ID		 645 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
646 num_request_data_items, gfp, true);
13d1ad16
ID		 647 if (!msg)
648 return -ENOMEM;
68b4476b 649
f24e9980 650 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 651 req->r_request = msg;
3499e8a5 652
13d1ad16
ID		 653 /* create reply message */
654 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 655 msg_size += req->r_base_oid.name_len;
656 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 657
658 if (req->r_mempool)
0d9c1ab3
ID		 659 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
660 num_reply_data_items);
13d1ad16 661 else
0d9c1ab3
ID		 662 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
663 num_reply_data_items, gfp, true);
13d1ad16
ID		 664 if (!msg)
665 return -ENOMEM;
666
667 req->r_reply = msg;
668
669 return 0;
3499e8a5
YS		 670}
671
a8dd0a37 672static bool osd_req_opcode_valid(u16 opcode)
68b4476b 673{
a8dd0a37 674 switch (opcode) {
70b5bfa3
ID		 675#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
676__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
677#undef GENERATE_CASE
a8dd0a37
AE		 678 default:
679 return false;
680 }
681}
682
0d9c1ab3
ID		 683static void get_num_data_items(struct ceph_osd_request *req,
684 int *num_request_data_items,
685 int *num_reply_data_items)
686{
687 struct ceph_osd_req_op *op;
688
689 *num_request_data_items = 0;
690 *num_reply_data_items = 0;
691
692 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
693 switch (op->op) {
694 /* request */
695 case CEPH_OSD_OP_WRITE:
696 case CEPH_OSD_OP_WRITEFULL:
697 case CEPH_OSD_OP_SETXATTR:
698 case CEPH_OSD_OP_CMPXATTR:
699 case CEPH_OSD_OP_NOTIFY_ACK:
23ddf9be 700 case CEPH_OSD_OP_COPY_FROM:
0d9c1ab3
ID		 701 *num_request_data_items += 1;
702 break;
703
704 /* reply */
705 case CEPH_OSD_OP_STAT:
706 case CEPH_OSD_OP_READ:
707 case CEPH_OSD_OP_LIST_WATCHERS:
708 *num_reply_data_items += 1;
709 break;
710
711 /* both */
712 case CEPH_OSD_OP_NOTIFY:
713 *num_request_data_items += 1;
714 *num_reply_data_items += 1;
715 break;
716 case CEPH_OSD_OP_CALL:
717 *num_request_data_items += 2;
718 *num_reply_data_items += 1;
719 break;
720
721 default:
722 WARN_ON(!osd_req_opcode_valid(op->op));
723 break;
724 }
725 }
726}
727
728/*
729 * oid, oloc and OSD op opcode(s) must be filled in before this function
730 * is called.
731 */
732int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
733{
734 int num_request_data_items, num_reply_data_items;
735
736 get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
737 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
738 num_reply_data_items);
739}
740EXPORT_SYMBOL(ceph_osdc_alloc_messages);
741
33803f33
AE		 742/*
743 * This is an osd op init function for opcodes that have no data or
744 * other information associated with them. It also serves as a
745 * common init routine for all the other init functions, below.
746 */
c99d2d4a 747static struct ceph_osd_req_op *
49719778 748_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 749 u16 opcode, u32 flags)
33803f33 750{
c99d2d4a
AE		 751 struct ceph_osd_req_op *op;
752
753 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 754 BUG_ON(!osd_req_opcode_valid(opcode));
755
c99d2d4a 756 op = &osd_req->r_ops[which];
33803f33 757 memset(op, 0, sizeof (*op));
33803f33 758 op->op = opcode;
144cba14 759 op->flags = flags;
c99d2d4a
AE		 760
761 return op;
33803f33
AE		 762}
763
49719778 764void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 765 unsigned int which, u16 opcode, u32 flags)
49719778 766{
144cba14 767 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 768}
769EXPORT_SYMBOL(osd_req_op_init);
770
c99d2d4a
AE		 771void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
772 unsigned int which, u16 opcode,
33803f33
AE		 773 u64 offset, u64 length,
774 u64 truncate_size, u32 truncate_seq)
775{
144cba14
YZ		 776 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
777 opcode, 0);
33803f33
AE		 778 size_t payload_len = 0;
779
ad7a60de 780 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 781 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
782 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 783
33803f33
AE		 784 op->extent.offset = offset;
785 op->extent.length = length;
786 op->extent.truncate_size = truncate_size;
787 op->extent.truncate_seq = truncate_seq;
e30b7577 788 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 789 payload_len += length;
790
de2aa102 791 op->indata_len = payload_len;
33803f33
AE		 792}
793EXPORT_SYMBOL(osd_req_op_extent_init);
794
c99d2d4a
AE		 795void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
796 unsigned int which, u64 length)
e5975c7c 797{
c99d2d4a
AE		 798 struct ceph_osd_req_op *op;
799 u64 previous;
800
801 BUG_ON(which >= osd_req->r_num_ops);
802 op = &osd_req->r_ops[which];
803 previous = op->extent.length;
e5975c7c
AE		 804
805 if (length == previous)
806 return; /* Nothing to do */
807 BUG_ON(length > previous);
808
809 op->extent.length = length;
d641df81
YZ		 810 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
811 op->indata_len -= previous - length;
e5975c7c
AE		 812}
813EXPORT_SYMBOL(osd_req_op_extent_update);
814
2c63f49a
YZ		 815void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
816 unsigned int which, u64 offset_inc)
817{
818 struct ceph_osd_req_op *op, *prev_op;
819
820 BUG_ON(which + 1 >= osd_req->r_num_ops);
821
822 prev_op = &osd_req->r_ops[which];
823 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
824 /* dup previous one */
825 op->indata_len = prev_op->indata_len;
826 op->outdata_len = prev_op->outdata_len;
827 op->extent = prev_op->extent;
828 /* adjust offset */
829 op->extent.offset += offset_inc;
830 op->extent.length -= offset_inc;
831
832 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
833 op->indata_len -= offset_inc;
834}
835EXPORT_SYMBOL(osd_req_op_extent_dup_last);
836
fe943d50 837int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
24639ce5 838 const char *class, const char *method)
33803f33 839{
24639ce5 840 struct ceph_osd_req_op *op;
5f562df5 841 struct ceph_pagelist *pagelist;
33803f33
AE		 842 size_t payload_len = 0;
843 size_t size;
844
24639ce5 845 op = _osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
33803f33 846
33165d47 847 pagelist = ceph_pagelist_alloc(GFP_NOFS);
fe943d50
CX		 848 if (!pagelist)
849 return -ENOMEM;
850
33803f33
AE		 851 op->cls.class_name = class;
852 size = strlen(class);
853 BUG_ON(size > (size_t) U8_MAX);
854 op->cls.class_len = size;
5f562df5 855 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 856 payload_len += size;
857
858 op->cls.method_name = method;
859 size = strlen(method);
860 BUG_ON(size > (size_t) U8_MAX);
861 op->cls.method_len = size;
5f562df5 862 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 863 payload_len += size;
864
a4ce40a9 865 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 866
de2aa102 867 op->indata_len = payload_len;
fe943d50 868 return 0;
33803f33
AE		 869}
870EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 871
d74b50be
YZ		 872int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
873 u16 opcode, const char *name, const void *value,
874 size_t size, u8 cmp_op, u8 cmp_mode)
875{
144cba14
YZ		 876 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
877 opcode, 0);
d74b50be
YZ		 878 struct ceph_pagelist *pagelist;
879 size_t payload_len;
880
881 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
882
33165d47 883 pagelist = ceph_pagelist_alloc(GFP_NOFS);
d74b50be
YZ		 884 if (!pagelist)
885 return -ENOMEM;
886
d74b50be
YZ		 887 payload_len = strlen(name);
888 op->xattr.name_len = payload_len;
889 ceph_pagelist_append(pagelist, name, payload_len);
890
891 op->xattr.value_len = size;
892 ceph_pagelist_append(pagelist, value, size);
893 payload_len += size;
894
895 op->xattr.cmp_op = cmp_op;
896 op->xattr.cmp_mode = cmp_mode;
897
898 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 899 op->indata_len = payload_len;
d74b50be
YZ		 900 return 0;
901}
902EXPORT_SYMBOL(osd_req_op_xattr_init);
903
922dab61
ID		 904/*
905 * @watch_opcode: CEPH_OSD_WATCH_OP_*
906 */
907static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
908 u64 cookie, u8 watch_opcode)
33803f33 909{
922dab61 910 struct ceph_osd_req_op *op;
33803f33 911
922dab61 912 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
33803f33 913 op->watch.cookie = cookie;
922dab61
ID		 914 op->watch.op = watch_opcode;
915 op->watch.gen = 0;
33803f33 916}
33803f33 917
c647b8a8
ID		 918void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
919 unsigned int which,
920 u64 expected_object_size,
921 u64 expected_write_size)
922{
923 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 924 CEPH_OSD_OP_SETALLOCHINT,
925 0);
c647b8a8
ID		 926
927 op->alloc_hint.expected_object_size = expected_object_size;
928 op->alloc_hint.expected_write_size = expected_write_size;
929
930 /*
931 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
932 * not worth a feature bit. Set FAILOK per-op flag to make
933 * sure older osds don't trip over an unsupported opcode.
934 */
935 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
936}
937EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
938
90af3602 939static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 940 struct ceph_osd_data *osd_data)
941{
942 u64 length = ceph_osd_data_length(osd_data);
943
944 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
945 BUG_ON(length > (u64) SIZE_MAX);
946 if (length)
90af3602 947 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 948 length, osd_data->alignment);
949 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
950 BUG_ON(!length);
90af3602 951 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 952#ifdef CONFIG_BLOCK
953 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
5359a17d 954 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
ec9123c5 955#endif
b9e281c2
ID		 956 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
957 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
ec9123c5
AE		 958 } else {
959 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
960 }
961}
962
bb873b53
ID		 963static u32 osd_req_encode_op(struct ceph_osd_op *dst,
964 const struct ceph_osd_req_op *src)
a8dd0a37 965{
a8dd0a37
AE		 966 switch (src->op) {
967 case CEPH_OSD_OP_STAT:
968 break;
969 case CEPH_OSD_OP_READ:
970 case CEPH_OSD_OP_WRITE:
e30b7577 971 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 972 case CEPH_OSD_OP_ZERO:
ad7a60de 973 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37
AE		 974 dst->extent.offset = cpu_to_le64(src->extent.offset);
975 dst->extent.length = cpu_to_le64(src->extent.length);
976 dst->extent.truncate_size =
977 cpu_to_le64(src->extent.truncate_size);
978 dst->extent.truncate_seq =
979 cpu_to_le32(src->extent.truncate_seq);
980 break;
981 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 982 dst->cls.class_len = src->cls.class_len;
983 dst->cls.method_len = src->cls.method_len;
bb873b53 984 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
a8dd0a37 985 break;
a8dd0a37
AE		 986 case CEPH_OSD_OP_WATCH:
987 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
922dab61
ID		 988 dst->watch.ver = cpu_to_le64(0);
989 dst->watch.op = src->watch.op;
990 dst->watch.gen = cpu_to_le32(src->watch.gen);
991 break;
992 case CEPH_OSD_OP_NOTIFY_ACK:
a8dd0a37 993 break;
19079203
ID		 994 case CEPH_OSD_OP_NOTIFY:
995 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
996 break;
a4ed38d7
DF		 997 case CEPH_OSD_OP_LIST_WATCHERS:
998 break;
c647b8a8
ID		 999 case CEPH_OSD_OP_SETALLOCHINT:
1000 dst->alloc_hint.expected_object_size =
1001 cpu_to_le64(src->alloc_hint.expected_object_size);
1002 dst->alloc_hint.expected_write_size =
1003 cpu_to_le64(src->alloc_hint.expected_write_size);
1004 break;
d74b50be
YZ		 1005 case CEPH_OSD_OP_SETXATTR:
1006 case CEPH_OSD_OP_CMPXATTR:
1007 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1008 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1009 dst->xattr.cmp_op = src->xattr.cmp_op;
1010 dst->xattr.cmp_mode = src->xattr.cmp_mode;
d74b50be 1011 break;
864e9197
YZ		 1012 case CEPH_OSD_OP_CREATE:
1013 case CEPH_OSD_OP_DELETE:
1014 break;
23ddf9be
LH		 1015 case CEPH_OSD_OP_COPY_FROM:
1016 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1017 dst->copy_from.src_version =
1018 cpu_to_le64(src->copy_from.src_version);
1019 dst->copy_from.flags = src->copy_from.flags;
1020 dst->copy_from.src_fadvise_flags =
1021 cpu_to_le32(src->copy_from.src_fadvise_flags);
1022 break;
a8dd0a37 1023 default:
4c46459c 1024 pr_err("unsupported osd opcode %s\n",
8f63ca2d 1025 ceph_osd_op_name(src->op));
4c46459c 1026 WARN_ON(1);
a8dd0a37
AE		 1027
1028 return 0;
68b4476b 1029 }
7b25bf5f 1030
a8dd0a37 1031 dst->op = cpu_to_le16(src->op);
7b25bf5f 1032 dst->flags = cpu_to_le32(src->flags);
de2aa102 1033 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 1034
bb873b53 1035 return src->indata_len;
68b4476b
YS		 1036}
1037
3499e8a5
YS		 1038/*
1039 * build new request AND message, calculate layout, and adjust file
1040 * extent as needed.
1041 *
1042 * if the file was recently truncated, we include information about its
1043 * old and new size so that the object can be updated appropriately. (we
1044 * avoid synchronously deleting truncated objects because it's slow.)
3499e8a5
YS		 1045 */
1046struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1047 struct ceph_file_layout *layout,
1048 struct ceph_vino vino,
715e4cd4
YZ		 1049 u64 off, u64 *plen,
1050 unsigned int which, int num_ops,
3499e8a5
YS		 1051 int opcode, int flags,
1052 struct ceph_snap_context *snapc,
3499e8a5
YS		 1053 u32 truncate_seq,
1054 u64 truncate_size,
153e5167 1055 bool use_mempool)
3499e8a5 1056{
68b4476b 1057 struct ceph_osd_request *req;
75d1c941
AE		 1058 u64 objnum = 0;
1059 u64 objoff = 0;
1060 u64 objlen = 0;
6816282d 1061 int r;
68b4476b 1062
ad7a60de 1063 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 1064 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1065 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 1066
acead002 1067 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 1068 GFP_NOFS);
13d1ad16
ID		 1069 if (!req) {
1070 r = -ENOMEM;
1071 goto fail;
1072 }
79528734 1073
3499e8a5 1074 /* calculate max write size */
a19dadfb 1075 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 1076 if (r)
1077 goto fail;
a19dadfb 1078
864e9197 1079 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 1080 osd_req_op_init(req, which, opcode, 0);
864e9197 1081 } else {
7627151e 1082 u32 object_size = layout->object_size;
864e9197
YZ		 1083 u32 object_base = off - objoff;
1084 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1085 if (truncate_size <= object_base) {
1086 truncate_size = 0;
1087 } else {
1088 truncate_size -= object_base;
1089 if (truncate_size > object_size)
1090 truncate_size = object_size;
1091 }
ccca4e37 1092 }
715e4cd4 1093 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 1094 truncate_size, truncate_seq);
1095 }
d18d1e28 1096
bb873b53 1097 req->r_flags = flags;
7627151e 1098 req->r_base_oloc.pool = layout->pool_id;
30c156d9 1099 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
d30291b9 1100 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
dbe0fc41 1101
bb873b53
ID		 1102 req->r_snapid = vino.snap;
1103 if (flags & CEPH_OSD_FLAG_WRITE)
1104 req->r_data_offset = off;
1105
0d9c1ab3
ID		 1106 if (num_ops > 1)
1107 /*
1108 * This is a special case for ceph_writepages_start(), but it
1109 * also covers ceph_uninline_data(). If more multi-op request
1110 * use cases emerge, we will need a separate helper.
1111 */
1112 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
1113 else
1114 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
13d1ad16
ID		 1115 if (r)
1116 goto fail;
1117
f24e9980 1118 return req;
13d1ad16
ID		 1119
1120fail:
1121 ceph_osdc_put_request(req);
1122 return ERR_PTR(r);
f24e9980 1123}
3d14c5d2 1124EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 1125
1126/*
1127 * We keep osd requests in an rbtree, sorted by ->r_tid.
1128 */
fcd00b68 1129DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
4609245e 1130DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
f24e9980 1131
66850df5
ID		 1132/*
1133 * Call @fn on each OSD request as long as @fn returns 0.
1134 */
1135static void for_each_request(struct ceph_osd_client *osdc,
1136 int (*fn)(struct ceph_osd_request *req, void *arg),
1137 void *arg)
1138{
1139 struct rb_node *n, *p;
1140
1141 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1142 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1143
1144 for (p = rb_first(&osd->o_requests); p; ) {
1145 struct ceph_osd_request *req =
1146 rb_entry(p, struct ceph_osd_request, r_node);
1147
1148 p = rb_next(p);
1149 if (fn(req, arg))
1150 return;
1151 }
1152 }
1153
1154 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1155 struct ceph_osd_request *req =
1156 rb_entry(p, struct ceph_osd_request, r_node);
1157
1158 p = rb_next(p);
1159 if (fn(req, arg))
1160 return;
1161 }
1162}
1163
0247a0cf
ID		 1164static bool osd_homeless(struct ceph_osd *osd)
1165{
1166 return osd->o_osd == CEPH_HOMELESS_OSD;
1167}
1168
5aea3dcd 1169static bool osd_registered(struct ceph_osd *osd)
f24e9980 1170{
5aea3dcd 1171 verify_osdc_locked(osd->o_osdc);
f24e9980 1172
5aea3dcd 1173 return !RB_EMPTY_NODE(&osd->o_node);
f24e9980
SW		 1174}
1175
0247a0cf
ID		 1176/*
1177 * Assumes @osd is zero-initialized.
1178 */
1179static void osd_init(struct ceph_osd *osd)
1180{
02113a0f 1181 refcount_set(&osd->o_ref, 1);
0247a0cf 1182 RB_CLEAR_NODE(&osd->o_node);
5aea3dcd 1183 osd->o_requests = RB_ROOT;
922dab61 1184 osd->o_linger_requests = RB_ROOT;
a02a946d
ID		 1185 osd->o_backoff_mappings = RB_ROOT;
1186 osd->o_backoffs_by_id = RB_ROOT;
0247a0cf
ID		 1187 INIT_LIST_HEAD(&osd->o_osd_lru);
1188 INIT_LIST_HEAD(&osd->o_keepalive_item);
1189 osd->o_incarnation = 1;
5aea3dcd 1190 mutex_init(&osd->lock);
0247a0cf
ID		 1191}
1192
1193static void osd_cleanup(struct ceph_osd *osd)
1194{
1195 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
5aea3dcd 1196 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 1197 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
a02a946d
ID		 1198 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1199 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
0247a0cf
ID		 1200 WARN_ON(!list_empty(&osd->o_osd_lru));
1201 WARN_ON(!list_empty(&osd->o_keepalive_item));
1202
1203 if (osd->o_auth.authorizer) {
1204 WARN_ON(osd_homeless(osd));
1205 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1206 }
1207}
1208
f24e9980
SW		 1209/*
1210 * Track open sessions with osds.
1211 */
e10006f8 1212static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1213{
1214 struct ceph_osd *osd;
1215
0247a0cf
ID		 1216 WARN_ON(onum == CEPH_HOMELESS_OSD);
1217
7a28f59b 1218 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
0247a0cf 1219 osd_init(osd);
f24e9980 1220 osd->o_osdc = osdc;
e10006f8 1221 osd->o_osd = onum;
f24e9980 1222
b7a9e5dd 1223 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1224
f24e9980
SW		 1225 return osd;
1226}
1227
1228static struct ceph_osd *get_osd(struct ceph_osd *osd)
1229{
02113a0f
ER		 1230 if (refcount_inc_not_zero(&osd->o_ref)) {
1231 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1232 refcount_read(&osd->o_ref));
f24e9980
SW		 1233 return osd;
1234 } else {
1235 dout("get_osd %p FAIL\n", osd);
1236 return NULL;
1237 }
1238}
1239
1240static void put_osd(struct ceph_osd *osd)
1241{
02113a0f
ER		 1242 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1243 refcount_read(&osd->o_ref) - 1);
1244 if (refcount_dec_and_test(&osd->o_ref)) {
0247a0cf 1245 osd_cleanup(osd);
f24e9980 1246 kfree(osd);
79494d1b 1247 }
f24e9980
SW		 1248}
1249
fcd00b68
ID		 1250DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1251
9dd2845c 1252static void __move_osd_to_lru(struct ceph_osd *osd)
f5a2041b 1253{
9dd2845c
ID		 1254 struct ceph_osd_client *osdc = osd->o_osdc;
1255
1256 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
f5a2041b 1257 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1258
9dd2845c 1259 spin_lock(&osdc->osd_lru_lock);
f5a2041b 1260 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
9dd2845c
ID		 1261 spin_unlock(&osdc->osd_lru_lock);
1262
a319bf56 1263 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1264}
1265
9dd2845c 1266static void maybe_move_osd_to_lru(struct ceph_osd *osd)
bbf37ec3 1267{
5aea3dcd 1268 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1269 RB_EMPTY_ROOT(&osd->o_linger_requests))
9dd2845c 1270 __move_osd_to_lru(osd);
bbf37ec3
ID		 1271}
1272
f5a2041b
YS		 1273static void __remove_osd_from_lru(struct ceph_osd *osd)
1274{
9dd2845c
ID		 1275 struct ceph_osd_client *osdc = osd->o_osdc;
1276
1277 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1278
1279 spin_lock(&osdc->osd_lru_lock);
f5a2041b
YS		 1280 if (!list_empty(&osd->o_osd_lru))
1281 list_del_init(&osd->o_osd_lru);
9dd2845c 1282 spin_unlock(&osdc->osd_lru_lock);
f5a2041b
YS		 1283}
1284
5aea3dcd
ID		 1285/*
1286 * Close the connection and assign any leftover requests to the
1287 * homeless session.
1288 */
1289static void close_osd(struct ceph_osd *osd)
1290{
1291 struct ceph_osd_client *osdc = osd->o_osdc;
1292 struct rb_node *n;
1293
1294 verify_osdc_wrlocked(osdc);
1295 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1296
1297 ceph_con_close(&osd->o_con);
1298
1299 for (n = rb_first(&osd->o_requests); n; ) {
1300 struct ceph_osd_request *req =
1301 rb_entry(n, struct ceph_osd_request, r_node);
1302
1303 n = rb_next(n); /* unlink_request() */
1304
1305 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1306 unlink_request(osd, req);
1307 link_request(&osdc->homeless_osd, req);
1308 }
922dab61
ID		 1309 for (n = rb_first(&osd->o_linger_requests); n; ) {
1310 struct ceph_osd_linger_request *lreq =
1311 rb_entry(n, struct ceph_osd_linger_request, node);
1312
1313 n = rb_next(n); /* unlink_linger() */
1314
1315 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1316 lreq->linger_id);
1317 unlink_linger(osd, lreq);
1318 link_linger(&osdc->homeless_osd, lreq);
1319 }
a02a946d 1320 clear_backoffs(osd);
5aea3dcd
ID		 1321
1322 __remove_osd_from_lru(osd);
1323 erase_osd(&osdc->osds, osd);
1324 put_osd(osd);
1325}
1326
f24e9980
SW		 1327/*
1328 * reset osd connect
1329 */
5aea3dcd 1330static int reopen_osd(struct ceph_osd *osd)
f24e9980 1331{
c3acb181 1332 struct ceph_entity_addr *peer_addr;
f24e9980 1333
5aea3dcd
ID		 1334 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1335
1336 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1337 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
5aea3dcd 1338 close_osd(osd);
c3acb181
AE		 1339 return -ENODEV;
1340 }
1341
5aea3dcd 1342 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
c3acb181
AE		 1343 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1344 !ceph_con_opened(&osd->o_con)) {
5aea3dcd 1345 struct rb_node *n;
c3acb181 1346
0b4af2e8
ID		 1347 dout("osd addr hasn't changed and connection never opened, "
1348 "letting msgr retry\n");
87b315a5 1349 /* touch each r_stamp for handle_timeout()'s benfit */
5aea3dcd
ID		 1350 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1351 struct ceph_osd_request *req =
1352 rb_entry(n, struct ceph_osd_request, r_node);
87b315a5 1353 req->r_stamp = jiffies;
5aea3dcd 1354 }
c3acb181
AE		 1355
1356 return -EAGAIN;
f24e9980 1357 }
c3acb181
AE		 1358
1359 ceph_con_close(&osd->o_con);
1360 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1361 osd->o_incarnation++;
1362
1363 return 0;
f24e9980
SW		 1364}
1365
5aea3dcd
ID		 1366static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1367 bool wrlocked)
f24e9980 1368{
5aea3dcd 1369 struct ceph_osd *osd;
35f9f8a0 1370
5aea3dcd
ID		 1371 if (wrlocked)
1372 verify_osdc_wrlocked(osdc);
1373 else
1374 verify_osdc_locked(osdc);
f24e9980 1375
5aea3dcd
ID		 1376 if (o != CEPH_HOMELESS_OSD)
1377 osd = lookup_osd(&osdc->osds, o);
1378 else
1379 osd = &osdc->homeless_osd;
1380 if (!osd) {
1381 if (!wrlocked)
1382 return ERR_PTR(-EAGAIN);
0ba6478d 1383
5aea3dcd
ID		 1384 osd = create_osd(osdc, o);
1385 insert_osd(&osdc->osds, osd);
1386 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1387 &osdc->osdmap->osd_addr[osd->o_osd]);
0ba6478d 1388 }
f24e9980 1389
5aea3dcd
ID		 1390 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1391 return osd;
f24e9980
SW		 1392}
1393
1394/*
5aea3dcd
ID		 1395 * Create request <-> OSD session relation.
1396 *
1397 * @req has to be assigned a tid, @osd may be homeless.
f24e9980 1398 */
5aea3dcd 1399static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
f24e9980 1400{
5aea3dcd
ID		 1401 verify_osd_locked(osd);
1402 WARN_ON(!req->r_tid || req->r_osd);
1403 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1404 req, req->r_tid);
1405
1406 if (!osd_homeless(osd))
1407 __remove_osd_from_lru(osd);
1408 else
1409 atomic_inc(&osd->o_osdc->num_homeless);
1410
1411 get_osd(osd);
1412 insert_request(&osd->o_requests, req);
1413 req->r_osd = osd;
f24e9980
SW		 1414}
1415
5aea3dcd
ID		 1416static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1417{
1418 verify_osd_locked(osd);
1419 WARN_ON(req->r_osd != osd);
1420 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1421 req, req->r_tid);
1422
1423 req->r_osd = NULL;
1424 erase_request(&osd->o_requests, req);
1425 put_osd(osd);
1426
1427 if (!osd_homeless(osd))
1428 maybe_move_osd_to_lru(osd);
1429 else
1430 atomic_dec(&osd->o_osdc->num_homeless);
1431}
1432
63244fa1
ID		 1433static bool __pool_full(struct ceph_pg_pool_info *pi)
1434{
1435 return pi->flags & CEPH_POOL_FLAG_FULL;
1436}
1437
42c1b124
ID		 1438static bool have_pool_full(struct ceph_osd_client *osdc)
1439{
1440 struct rb_node *n;
1441
1442 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1443 struct ceph_pg_pool_info *pi =
1444 rb_entry(n, struct ceph_pg_pool_info, node);
1445
1446 if (__pool_full(pi))
1447 return true;
1448 }
1449
1450 return false;
1451}
1452
5aea3dcd
ID		 1453static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1454{
1455 struct ceph_pg_pool_info *pi;
1456
1457 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1458 if (!pi)
1459 return false;
1460
1461 return __pool_full(pi);
1462}
1463
d29adb34
JD		 1464/*
1465 * Returns whether a request should be blocked from being sent
1466 * based on the current osdmap and osd_client settings.
d29adb34 1467 */
63244fa1
ID		 1468static bool target_should_be_paused(struct ceph_osd_client *osdc,
1469 const struct ceph_osd_request_target *t,
1470 struct ceph_pg_pool_info *pi)
1471{
b7ec35b3
ID		 1472 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1473 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1474 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
63244fa1
ID		 1475 __pool_full(pi);
1476
6d637a54 1477 WARN_ON(pi->id != t->target_oloc.pool);
58eb7932
JL		 1478 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1479 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1480 (osdc->osdmap->epoch < osdc->epoch_barrier);
63244fa1
ID		 1481}
1482
63244fa1
ID		 1483enum calc_target_result {
1484 CALC_TARGET_NO_ACTION = 0,
1485 CALC_TARGET_NEED_RESEND,
1486 CALC_TARGET_POOL_DNE,
1487};
1488
1489static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1490 struct ceph_osd_request_target *t,
7de030d6 1491 struct ceph_connection *con,
63244fa1
ID		 1492 bool any_change)
1493{
1494 struct ceph_pg_pool_info *pi;
1495 struct ceph_pg pgid, last_pgid;
1496 struct ceph_osds up, acting;
1497 bool force_resend = false;
84ed45df
ID		 1498 bool unpaused = false;
1499 bool legacy_change;
7de030d6 1500 bool split = false;
b7ec35b3 1501 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
ae78dd81
ID		 1502 bool recovery_deletes = ceph_osdmap_flag(osdc,
1503 CEPH_OSDMAP_RECOVERY_DELETES);
63244fa1 1504 enum calc_target_result ct_res;
63244fa1 1505
04c7d789 1506 t->epoch = osdc->osdmap->epoch;
63244fa1
ID		 1507 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1508 if (!pi) {
1509 t->osd = CEPH_HOMELESS_OSD;
1510 ct_res = CALC_TARGET_POOL_DNE;
1511 goto out;
1512 }
1513
1514 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
dc93e0e2
ID		 1515 if (t->last_force_resend < pi->last_force_request_resend) {
1516 t->last_force_resend = pi->last_force_request_resend;
63244fa1 1517 force_resend = true;
dc93e0e2 1518 } else if (t->last_force_resend == 0) {
63244fa1
ID		 1519 force_resend = true;
1520 }
1521 }
63244fa1 1522
db098ec4
ID		 1523 /* apply tiering */
1524 ceph_oid_copy(&t->target_oid, &t->base_oid);
1525 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1526 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
63244fa1
ID		 1527 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1528 t->target_oloc.pool = pi->read_tier;
1529 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1530 t->target_oloc.pool = pi->write_tier;
6d637a54
ID		 1531
1532 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1533 if (!pi) {
1534 t->osd = CEPH_HOMELESS_OSD;
1535 ct_res = CALC_TARGET_POOL_DNE;
1536 goto out;
1537 }
63244fa1
ID		 1538 }
1539
a86f009f 1540 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
63244fa1
ID		 1541 last_pgid.pool = pgid.pool;
1542 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1543
df28152d 1544 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
63244fa1
ID		 1545 if (any_change &&
1546 ceph_is_new_interval(&t->acting,
1547 &acting,
1548 &t->up,
1549 &up,
1550 t->size,
1551 pi->size,
1552 t->min_size,
1553 pi->min_size,
1554 t->pg_num,
1555 pi->pg_num,
1556 t->sort_bitwise,
1557 sort_bitwise,
ae78dd81
ID		 1558 t->recovery_deletes,
1559 recovery_deletes,
63244fa1
ID		 1560 &last_pgid))
1561 force_resend = true;
1562
1563 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1564 t->paused = false;
84ed45df 1565 unpaused = true;
63244fa1 1566 }
84ed45df
ID		 1567 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1568 ceph_osds_changed(&t->acting, &acting, any_change);
7de030d6
ID		 1569 if (t->pg_num)
1570 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
63244fa1 1571
7de030d6 1572 if (legacy_change || force_resend || split) {
63244fa1 1573 t->pgid = pgid; /* struct */
df28152d 1574 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
63244fa1
ID		 1575 ceph_osds_copy(&t->acting, &acting);
1576 ceph_osds_copy(&t->up, &up);
1577 t->size = pi->size;
1578 t->min_size = pi->min_size;
1579 t->pg_num = pi->pg_num;
1580 t->pg_num_mask = pi->pg_num_mask;
1581 t->sort_bitwise = sort_bitwise;
ae78dd81 1582 t->recovery_deletes = recovery_deletes;
63244fa1
ID		 1583
1584 t->osd = acting.primary;
63244fa1
ID		 1585 }
1586
7de030d6
ID		 1587 if (unpaused || legacy_change || force_resend ||
1588 (split && con && CEPH_HAVE_FEATURE(con->peer_features,
1589 RESEND_ON_SPLIT)))
84ed45df
ID		 1590 ct_res = CALC_TARGET_NEED_RESEND;
1591 else
1592 ct_res = CALC_TARGET_NO_ACTION;
1593
63244fa1
ID		 1594out:
1595 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1596 return ct_res;
1597}
1598
a02a946d
ID		 1599static struct ceph_spg_mapping *alloc_spg_mapping(void)
1600{
1601 struct ceph_spg_mapping *spg;
1602
1603 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1604 if (!spg)
1605 return NULL;
1606
1607 RB_CLEAR_NODE(&spg->node);
1608 spg->backoffs = RB_ROOT;
1609 return spg;
1610}
1611
1612static void free_spg_mapping(struct ceph_spg_mapping *spg)
1613{
1614 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1615 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1616
1617 kfree(spg);
1618}
1619
1620/*
1621 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1622 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1623 * defined only within a specific spgid; it does not pass anything to
1624 * children on split, or to another primary.
1625 */
1626DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1627 RB_BYPTR, const struct ceph_spg *, node)
1628
1629static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1630{
1631 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1632}
1633
1634static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1635 void **pkey, size_t *pkey_len)
1636{
1637 if (hoid->key_len) {
1638 *pkey = hoid->key;
1639 *pkey_len = hoid->key_len;
1640 } else {
1641 *pkey = hoid->oid;
1642 *pkey_len = hoid->oid_len;
1643 }
1644}
1645
1646static int compare_names(const void *name1, size_t name1_len,
1647 const void *name2, size_t name2_len)
1648{
1649 int ret;
1650
1651 ret = memcmp(name1, name2, min(name1_len, name2_len));
1652 if (!ret) {
1653 if (name1_len < name2_len)
1654 ret = -1;
1655 else if (name1_len > name2_len)
1656 ret = 1;
1657 }
1658 return ret;
1659}
1660
1661static int hoid_compare(const struct ceph_hobject_id *lhs,
1662 const struct ceph_hobject_id *rhs)
1663{
1664 void *effective_key1, *effective_key2;
1665 size_t effective_key1_len, effective_key2_len;
1666 int ret;
1667
1668 if (lhs->is_max < rhs->is_max)
1669 return -1;
1670 if (lhs->is_max > rhs->is_max)
1671 return 1;
1672
1673 if (lhs->pool < rhs->pool)
1674 return -1;
1675 if (lhs->pool > rhs->pool)
1676 return 1;
1677
1678 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1679 return -1;
1680 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1681 return 1;
1682
1683 ret = compare_names(lhs->nspace, lhs->nspace_len,
1684 rhs->nspace, rhs->nspace_len);
1685 if (ret)
1686 return ret;
1687
1688 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1689 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1690 ret = compare_names(effective_key1, effective_key1_len,
1691 effective_key2, effective_key2_len);
1692 if (ret)
1693 return ret;
1694
1695 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1696 if (ret)
1697 return ret;
1698
1699 if (lhs->snapid < rhs->snapid)
1700 return -1;
1701 if (lhs->snapid > rhs->snapid)
1702 return 1;
1703
1704 return 0;
1705}
1706
1707/*
1708 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1709 * compat stuff here.
1710 *
1711 * Assumes @hoid is zero-initialized.
1712 */
1713static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1714{
1715 u8 struct_v;
1716 u32 struct_len;
1717 int ret;
1718
1719 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1720 &struct_len);
1721 if (ret)
1722 return ret;
1723
1724 if (struct_v < 4) {
1725 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1726 goto e_inval;
1727 }
1728
1729 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1730 GFP_NOIO);
1731 if (IS_ERR(hoid->key)) {
1732 ret = PTR_ERR(hoid->key);
1733 hoid->key = NULL;
1734 return ret;
1735 }
1736
1737 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1738 GFP_NOIO);
1739 if (IS_ERR(hoid->oid)) {
1740 ret = PTR_ERR(hoid->oid);
1741 hoid->oid = NULL;
1742 return ret;
1743 }
1744
1745 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1746 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1747 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1748
1749 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1750 GFP_NOIO);
1751 if (IS_ERR(hoid->nspace)) {
1752 ret = PTR_ERR(hoid->nspace);
1753 hoid->nspace = NULL;
1754 return ret;
1755 }
1756
1757 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1758
1759 ceph_hoid_build_hash_cache(hoid);
1760 return 0;
1761
1762e_inval:
1763 return -EINVAL;
1764}
1765
1766static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1767{
1768 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1769 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1770}
1771
1772static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1773{
1774 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1775 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1776 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1777 ceph_encode_64(p, hoid->snapid);
1778 ceph_encode_32(p, hoid->hash);
1779 ceph_encode_8(p, hoid->is_max);
1780 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1781 ceph_encode_64(p, hoid->pool);
1782}
1783
1784static void free_hoid(struct ceph_hobject_id *hoid)
1785{
1786 if (hoid) {
1787 kfree(hoid->key);
1788 kfree(hoid->oid);
1789 kfree(hoid->nspace);
1790 kfree(hoid);
1791 }
1792}
1793
1794static struct ceph_osd_backoff *alloc_backoff(void)
1795{
1796 struct ceph_osd_backoff *backoff;
1797
1798 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1799 if (!backoff)
1800 return NULL;
1801
1802 RB_CLEAR_NODE(&backoff->spg_node);
1803 RB_CLEAR_NODE(&backoff->id_node);
1804 return backoff;
1805}
1806
1807static void free_backoff(struct ceph_osd_backoff *backoff)
1808{
1809 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1810 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1811
1812 free_hoid(backoff->begin);
1813 free_hoid(backoff->end);
1814 kfree(backoff);
1815}
1816
1817/*
1818 * Within a specific spgid, backoffs are managed by ->begin hoid.
1819 */
1820DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1821 RB_BYVAL, spg_node);
1822
1823static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1824 const struct ceph_hobject_id *hoid)
1825{
1826 struct rb_node *n = root->rb_node;
1827
1828 while (n) {
1829 struct ceph_osd_backoff *cur =
1830 rb_entry(n, struct ceph_osd_backoff, spg_node);
1831 int cmp;
1832
1833 cmp = hoid_compare(hoid, cur->begin);
1834 if (cmp < 0) {
1835 n = n->rb_left;
1836 } else if (cmp > 0) {
1837 if (hoid_compare(hoid, cur->end) < 0)
1838 return cur;
1839
1840 n = n->rb_right;
1841 } else {
1842 return cur;
1843 }
1844 }
1845
1846 return NULL;
1847}
1848
1849/*
1850 * Each backoff has a unique id within its OSD session.
1851 */
1852DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1853
1854static void clear_backoffs(struct ceph_osd *osd)
1855{
1856 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1857 struct ceph_spg_mapping *spg =
1858 rb_entry(rb_first(&osd->o_backoff_mappings),
1859 struct ceph_spg_mapping, node);
1860
1861 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1862 struct ceph_osd_backoff *backoff =
1863 rb_entry(rb_first(&spg->backoffs),
1864 struct ceph_osd_backoff, spg_node);
1865
1866 erase_backoff(&spg->backoffs, backoff);
1867 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1868 free_backoff(backoff);
1869 }
1870 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1871 free_spg_mapping(spg);
1872 }
1873}
1874
1875/*
1876 * Set up a temporary, non-owning view into @t.
1877 */
1878static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1879 const struct ceph_osd_request_target *t)
1880{
1881 hoid->key = NULL;
1882 hoid->key_len = 0;
1883 hoid->oid = t->target_oid.name;
1884 hoid->oid_len = t->target_oid.name_len;
1885 hoid->snapid = CEPH_NOSNAP;
1886 hoid->hash = t->pgid.seed;
1887 hoid->is_max = false;
1888 if (t->target_oloc.pool_ns) {
1889 hoid->nspace = t->target_oloc.pool_ns->str;
1890 hoid->nspace_len = t->target_oloc.pool_ns->len;
1891 } else {
1892 hoid->nspace = NULL;
1893 hoid->nspace_len = 0;
1894 }
1895 hoid->pool = t->target_oloc.pool;
1896 ceph_hoid_build_hash_cache(hoid);
1897}
1898
1899static bool should_plug_request(struct ceph_osd_request *req)
1900{
1901 struct ceph_osd *osd = req->r_osd;
1902 struct ceph_spg_mapping *spg;
1903 struct ceph_osd_backoff *backoff;
1904 struct ceph_hobject_id hoid;
1905
1906 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1907 if (!spg)
1908 return false;
1909
1910 hoid_fill_from_target(&hoid, &req->r_t);
1911 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1912 if (!backoff)
1913 return false;
1914
1915 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1916 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1917 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1918 return true;
1919}
1920
0d9c1ab3
ID		 1921/*
1922 * Keep get_num_data_items() in sync with this function.
1923 */
98c4bfe9 1924static void setup_request_data(struct ceph_osd_request *req)
f24e9980 1925{
98c4bfe9
ID		 1926 struct ceph_msg *request_msg = req->r_request;
1927 struct ceph_msg *reply_msg = req->r_reply;
1928 struct ceph_osd_req_op *op;
bb873b53 1929
98c4bfe9 1930 if (req->r_request->num_data_items || req->r_reply->num_data_items)
bb873b53 1931 return;
f24e9980 1932
98c4bfe9
ID		 1933 WARN_ON(request_msg->data_length || reply_msg->data_length);
1934 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
bb873b53
ID		 1935 switch (op->op) {
1936 /* request */
1937 case CEPH_OSD_OP_WRITE:
1938 case CEPH_OSD_OP_WRITEFULL:
1939 WARN_ON(op->indata_len != op->extent.length);
98c4bfe9
ID		 1940 ceph_osdc_msg_data_add(request_msg,
1941 &op->extent.osd_data);
bb873b53
ID		 1942 break;
1943 case CEPH_OSD_OP_SETXATTR:
1944 case CEPH_OSD_OP_CMPXATTR:
1945 WARN_ON(op->indata_len != op->xattr.name_len +
1946 op->xattr.value_len);
98c4bfe9
ID		 1947 ceph_osdc_msg_data_add(request_msg,
1948 &op->xattr.osd_data);
bb873b53 1949 break;
922dab61 1950 case CEPH_OSD_OP_NOTIFY_ACK:
98c4bfe9 1951 ceph_osdc_msg_data_add(request_msg,
922dab61
ID		 1952 &op->notify_ack.request_data);
1953 break;
23ddf9be
LH		 1954 case CEPH_OSD_OP_COPY_FROM:
1955 ceph_osdc_msg_data_add(request_msg,
1956 &op->copy_from.osd_data);
1957 break;
bb873b53
ID		 1958
1959 /* reply */
1960 case CEPH_OSD_OP_STAT:
98c4bfe9 1961 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 1962 &op->raw_data_in);
1963 break;
1964 case CEPH_OSD_OP_READ:
98c4bfe9 1965 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 1966 &op->extent.osd_data);
1967 break;
a4ed38d7 1968 case CEPH_OSD_OP_LIST_WATCHERS:
98c4bfe9 1969 ceph_osdc_msg_data_add(reply_msg,
a4ed38d7
DF		 1970 &op->list_watchers.response_data);
1971 break;
bb873b53
ID		 1972
1973 /* both */
1974 case CEPH_OSD_OP_CALL:
1975 WARN_ON(op->indata_len != op->cls.class_len +
1976 op->cls.method_len +
1977 op->cls.indata_len);
98c4bfe9
ID		 1978 ceph_osdc_msg_data_add(request_msg,
1979 &op->cls.request_info);
bb873b53 1980 /* optional, can be NONE */
98c4bfe9
ID		 1981 ceph_osdc_msg_data_add(request_msg,
1982 &op->cls.request_data);
bb873b53 1983 /* optional, can be NONE */
98c4bfe9 1984 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 1985 &op->cls.response_data);
1986 break;
19079203 1987 case CEPH_OSD_OP_NOTIFY:
98c4bfe9 1988 ceph_osdc_msg_data_add(request_msg,
19079203 1989 &op->notify.request_data);
98c4bfe9 1990 ceph_osdc_msg_data_add(reply_msg,
19079203
ID		 1991 &op->notify.response_data);
1992 break;
bb873b53 1993 }
bb873b53 1994 }
bb873b53
ID		 1995}
1996
2e59ffd1
ID		 1997static void encode_pgid(void **p, const struct ceph_pg *pgid)
1998{
1999 ceph_encode_8(p, 1);
2000 ceph_encode_64(p, pgid->pool);
2001 ceph_encode_32(p, pgid->seed);
2002 ceph_encode_32(p, -1); /* preferred */
2003}
2004
8cb441c0
ID		 2005static void encode_spgid(void **p, const struct ceph_spg *spgid)
2006{
2007 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2008 encode_pgid(p, &spgid->pgid);
2009 ceph_encode_8(p, spgid->shard);
2010}
2011
2e59ffd1
ID		 2012static void encode_oloc(void **p, void *end,
2013 const struct ceph_object_locator *oloc)
2014{
2015 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2016 ceph_encode_64(p, oloc->pool);
2017 ceph_encode_32(p, -1); /* preferred */
2018 ceph_encode_32(p, 0); /* key len */
2019 if (oloc->pool_ns)
2020 ceph_encode_string(p, end, oloc->pool_ns->str,
2021 oloc->pool_ns->len);
2022 else
2023 ceph_encode_32(p, 0);
2024}
2025
8cb441c0
ID		 2026static void encode_request_partial(struct ceph_osd_request *req,
2027 struct ceph_msg *msg)
bb873b53
ID		 2028{
2029 void *p = msg->front.iov_base;
2030 void *const end = p + msg->front_alloc_len;
2031 u32 data_len = 0;
2032 int i;
2033
2034 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2035 /* snapshots aren't writeable */
2036 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2037 } else {
2038 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2039 req->r_data_offset || req->r_snapc);
2040 }
2041
98c4bfe9 2042 setup_request_data(req);
bb873b53 2043
8cb441c0
ID		 2044 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2045 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
bb873b53
ID		 2046 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2047 ceph_encode_32(&p, req->r_flags);
8cb441c0
ID		 2048
2049 /* reqid */
2050 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2051 memset(p, 0, sizeof(struct ceph_osd_reqid));
2052 p += sizeof(struct ceph_osd_reqid);
2053
2054 /* trace */
2055 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2056 p += sizeof(struct ceph_blkin_trace_info);
2057
2058 ceph_encode_32(&p, 0); /* client_inc, always 0 */
fac02ddf 2059 ceph_encode_timespec64(p, &req->r_mtime);
bb873b53 2060 p += sizeof(struct ceph_timespec);
aa26d662 2061
2e59ffd1 2062 encode_oloc(&p, end, &req->r_t.target_oloc);
2e59ffd1
ID		 2063 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2064 req->r_t.target_oid.name_len);
f24e9980 2065
bb873b53
ID		 2066 /* ops, can imply data */
2067 ceph_encode_16(&p, req->r_num_ops);
2068 for (i = 0; i < req->r_num_ops; i++) {
2069 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2070 p += sizeof(struct ceph_osd_op);
2071 }
26be8808 2072
bb873b53
ID		 2073 ceph_encode_64(&p, req->r_snapid); /* snapid */
2074 if (req->r_snapc) {
2075 ceph_encode_64(&p, req->r_snapc->seq);
2076 ceph_encode_32(&p, req->r_snapc->num_snaps);
2077 for (i = 0; i < req->r_snapc->num_snaps; i++)
2078 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2079 } else {
2080 ceph_encode_64(&p, 0); /* snap_seq */
2081 ceph_encode_32(&p, 0); /* snaps len */
2082 }
2083
2084 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
986e8989 2085 BUG_ON(p > end - 8); /* space for features */
bb873b53 2086
8cb441c0
ID		 2087 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2088 /* front_len is finalized in encode_request_finish() */
986e8989
ID		 2089 msg->front.iov_len = p - msg->front.iov_base;
2090 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
bb873b53
ID		 2091 msg->hdr.data_len = cpu_to_le32(data_len);
2092 /*
2093 * The header "data_off" is a hint to the receiver allowing it
2094 * to align received data into its buffers such that there's no
2095 * need to re-copy it before writing it to disk (direct I/O).
2096 */
2097 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
26be8808 2098
8cb441c0
ID		 2099 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2100 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2101}
2102
2103static void encode_request_finish(struct ceph_msg *msg)
2104{
2105 void *p = msg->front.iov_base;
986e8989 2106 void *const partial_end = p + msg->front.iov_len;
8cb441c0
ID		 2107 void *const end = p + msg->front_alloc_len;
2108
2109 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2110 /* luminous OSD -- encode features and be done */
986e8989 2111 p = partial_end;
8cb441c0
ID		 2112 ceph_encode_64(&p, msg->con->peer_features);
2113 } else {
2114 struct {
2115 char spgid[CEPH_ENCODING_START_BLK_LEN +
2116 CEPH_PGID_ENCODING_LEN + 1];
2117 __le32 hash;
2118 __le32 epoch;
2119 __le32 flags;
2120 char reqid[CEPH_ENCODING_START_BLK_LEN +
2121 sizeof(struct ceph_osd_reqid)];
2122 char trace[sizeof(struct ceph_blkin_trace_info)];
2123 __le32 client_inc;
2124 struct ceph_timespec mtime;
2125 } __packed head;
2126 struct ceph_pg pgid;
2127 void *oloc, *oid, *tail;
2128 int oloc_len, oid_len, tail_len;
2129 int len;
2130
2131 /*
2132 * Pre-luminous OSD -- reencode v8 into v4 using @head
2133 * as a temporary buffer. Encode the raw PG; the rest
2134 * is just a matter of moving oloc, oid and tail blobs
2135 * around.
2136 */
2137 memcpy(&head, p, sizeof(head));
2138 p += sizeof(head);
2139
2140 oloc = p;
2141 p += CEPH_ENCODING_START_BLK_LEN;
2142 pgid.pool = ceph_decode_64(&p);
2143 p += 4 + 4; /* preferred, key len */
2144 len = ceph_decode_32(&p);
2145 p += len; /* nspace */
2146 oloc_len = p - oloc;
2147
2148 oid = p;
2149 len = ceph_decode_32(&p);
2150 p += len;
2151 oid_len = p - oid;
2152
2153 tail = p;
986e8989 2154 tail_len = partial_end - p;
8cb441c0
ID		 2155
2156 p = msg->front.iov_base;
2157 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2158 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2159 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2160 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2161
2162 /* reassert_version */
2163 memset(p, 0, sizeof(struct ceph_eversion));
2164 p += sizeof(struct ceph_eversion);
2165
2166 BUG_ON(p >= oloc);
2167 memmove(p, oloc, oloc_len);
2168 p += oloc_len;
2169
2170 pgid.seed = le32_to_cpu(head.hash);
2171 encode_pgid(&p, &pgid); /* raw pg */
2172
2173 BUG_ON(p >= oid);
2174 memmove(p, oid, oid_len);
2175 p += oid_len;
2176
2177 /* tail -- ops, snapid, snapc, retry_attempt */
2178 BUG_ON(p >= tail);
2179 memmove(p, tail, tail_len);
2180 p += tail_len;
2181
2182 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2183 }
2184
2185 BUG_ON(p > end);
2186 msg->front.iov_len = p - msg->front.iov_base;
2187 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2188
2189 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2190 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2191 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2192 le16_to_cpu(msg->hdr.version));
bb873b53
ID		 2193}
2194
2195/*
2196 * @req has to be assigned a tid and registered.
2197 */
2198static void send_request(struct ceph_osd_request *req)
2199{
2200 struct ceph_osd *osd = req->r_osd;
2201
5aea3dcd 2202 verify_osd_locked(osd);
bb873b53
ID		 2203 WARN_ON(osd->o_osd != req->r_t.osd);
2204
a02a946d
ID		 2205 /* backoff? */
2206 if (should_plug_request(req))
2207 return;
2208
5aea3dcd
ID		 2209 /*
2210 * We may have a previously queued request message hanging
2211 * around. Cancel it to avoid corrupting the msgr.
2212 */
2213 if (req->r_sent)
2214 ceph_msg_revoke(req->r_request);
2215
bb873b53
ID		 2216 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2217 if (req->r_attempts)
2218 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2219 else
2220 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2221
8cb441c0 2222 encode_request_partial(req, req->r_request);
bb873b53 2223
04c7d789 2224 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
bb873b53 2225 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
dc98ff72 2226 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
04c7d789
ID		 2227 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2228 req->r_attempts);
bb873b53
ID		 2229
2230 req->r_t.paused = false;
2231 req->r_stamp = jiffies;
2232 req->r_attempts++;
2233
2234 req->r_sent = osd->o_incarnation;
2235 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2236 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
f24e9980
SW		 2237}
2238
42c1b124
ID		 2239static void maybe_request_map(struct ceph_osd_client *osdc)
2240{
2241 bool continuous = false;
2242
5aea3dcd 2243 verify_osdc_locked(osdc);
42c1b124
ID		 2244 WARN_ON(!osdc->osdmap->epoch);
2245
b7ec35b3
ID		 2246 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2247 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2248 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
42c1b124
ID		 2249 dout("%s osdc %p continuous\n", __func__, osdc);
2250 continuous = true;
2251 } else {
2252 dout("%s osdc %p onetime\n", __func__, osdc);
2253 }
2254
2255 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2256 osdc->osdmap->epoch + 1, continuous))
2257 ceph_monc_renew_subs(&osdc->client->monc);
2258}
2259
a1f4020a 2260static void complete_request(struct ceph_osd_request *req, int err);
4609245e
ID		 2261static void send_map_check(struct ceph_osd_request *req);
2262
5aea3dcd 2263static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
0bbfdfe8 2264{
5aea3dcd
ID		 2265 struct ceph_osd_client *osdc = req->r_osdc;
2266 struct ceph_osd *osd;
4609245e 2267 enum calc_target_result ct_res;
66850df5 2268 int err = 0;
5aea3dcd
ID		 2269 bool need_send = false;
2270 bool promoted = false;
0bbfdfe8 2271
b18b9550 2272 WARN_ON(req->r_tid);
5aea3dcd
ID		 2273 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2274
2275again:
7de030d6 2276 ct_res = calc_target(osdc, &req->r_t, NULL, false);
4609245e
ID		 2277 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2278 goto promote;
2279
5aea3dcd
ID		 2280 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2281 if (IS_ERR(osd)) {
2282 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2283 goto promote;
0bbfdfe8
ID		 2284 }
2285
66850df5
ID		 2286 if (osdc->abort_err) {
2287 dout("req %p abort_err %d\n", req, osdc->abort_err);
2288 err = osdc->abort_err;
2289 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
58eb7932
JL		 2290 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2291 osdc->epoch_barrier);
2292 req->r_t.paused = true;
2293 maybe_request_map(osdc);
2294 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2295 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
5aea3dcd
ID		 2296 dout("req %p pausewr\n", req);
2297 req->r_t.paused = true;
2298 maybe_request_map(osdc);
2299 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
b7ec35b3 2300 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
5aea3dcd
ID		 2301 dout("req %p pauserd\n", req);
2302 req->r_t.paused = true;
2303 maybe_request_map(osdc);
2304 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2305 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2306 CEPH_OSD_FLAG_FULL_FORCE)) &&
b7ec35b3 2307 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
5aea3dcd
ID		 2308 pool_full(osdc, req->r_t.base_oloc.pool))) {
2309 dout("req %p full/pool_full\n", req);
02b2f549 2310 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
66850df5 2311 err = -ENOSPC;
29e87820
ID		 2312 } else {
2313 pr_warn_ratelimited("FULL or reached pool quota\n");
2314 req->r_t.paused = true;
2315 maybe_request_map(osdc);
2316 }
5aea3dcd
ID		 2317 } else if (!osd_homeless(osd)) {
2318 need_send = true;
0bbfdfe8 2319 } else {
5aea3dcd 2320 maybe_request_map(osdc);
0bbfdfe8
ID		 2321 }
2322
5aea3dcd
ID		 2323 mutex_lock(&osd->lock);
2324 /*
2325 * Assign the tid atomically with send_request() to protect
2326 * multiple writes to the same object from racing with each
2327 * other, resulting in out of order ops on the OSDs.
2328 */
2329 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2330 link_request(osd, req);
2331 if (need_send)
2332 send_request(req);
66850df5
ID		 2333 else if (err)
2334 complete_request(req, err);
5aea3dcd
ID		 2335 mutex_unlock(&osd->lock);
2336
6001567c 2337 if (!err && ct_res == CALC_TARGET_POOL_DNE)
4609245e
ID		 2338 send_map_check(req);
2339
5aea3dcd
ID		 2340 if (promoted)
2341 downgrade_write(&osdc->lock);
2342 return;
2343
2344promote:
2345 up_read(&osdc->lock);
2346 down_write(&osdc->lock);
2347 wrlocked = true;
2348 promoted = true;
2349 goto again;
2350}
2351
2352static void account_request(struct ceph_osd_request *req)
2353{
54ea0046 2354 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
b18b9550 2355 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
5aea3dcd 2356
b18b9550 2357 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
5aea3dcd 2358 atomic_inc(&req->r_osdc->num_requests);
7cc5e38f
ID		 2359
2360 req->r_start_stamp = jiffies;
5aea3dcd
ID		 2361}
2362
2363static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2364{
2365 ceph_osdc_get_request(req);
2366 account_request(req);
2367 __submit_request(req, wrlocked);
2368}
2369
45ee2c1d 2370static void finish_request(struct ceph_osd_request *req)
5aea3dcd
ID		 2371{
2372 struct ceph_osd_client *osdc = req->r_osdc;
5aea3dcd 2373
04c7d789 2374 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
5aea3dcd
ID		 2375 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2376
04c7d789
ID		 2377 if (req->r_osd)
2378 unlink_request(req->r_osd, req);
5aea3dcd
ID		 2379 atomic_dec(&osdc->num_requests);
2380
2381 /*
2382 * If an OSD has failed or returned and a request has been sent
2383 * twice, it's possible to get a reply and end up here while the
2384 * request message is queued for delivery. We will ignore the
2385 * reply, so not a big deal, but better to try and catch it.
2386 */
2387 ceph_msg_revoke(req->r_request);
2388 ceph_msg_revoke_incoming(req->r_reply);
2389}
2390
fe5da05e
ID		 2391static void __complete_request(struct ceph_osd_request *req)
2392{
d75f773c 2393 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
26df726b
ID		 2394 req->r_tid, req->r_callback, req->r_result);
2395
2396 if (req->r_callback)
fe5da05e 2397 req->r_callback(req);
26df726b
ID		 2398 complete_all(&req->r_completion);
2399 ceph_osdc_put_request(req);
fe5da05e
ID		 2400}
2401
88bc1922
ID		 2402static void complete_request_workfn(struct work_struct *work)
2403{
2404 struct ceph_osd_request *req =
2405 container_of(work, struct ceph_osd_request, r_complete_work);
2406
2407 __complete_request(req);
fe5da05e
ID		 2408}
2409
4609245e 2410/*
b18b9550 2411 * This is open-coded in handle_reply().
4609245e
ID		 2412 */
2413static void complete_request(struct ceph_osd_request *req, int err)
2414{
2415 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2416
2417 req->r_result = err;
45ee2c1d 2418 finish_request(req);
88bc1922
ID		 2419
2420 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2421 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
4609245e
ID		 2422}
2423
2424static void cancel_map_check(struct ceph_osd_request *req)
2425{
2426 struct ceph_osd_client *osdc = req->r_osdc;
2427 struct ceph_osd_request *lookup_req;
2428
2429 verify_osdc_wrlocked(osdc);
2430
2431 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2432 if (!lookup_req)
2433 return;
2434
2435 WARN_ON(lookup_req != req);
2436 erase_request_mc(&osdc->map_checks, req);
2437 ceph_osdc_put_request(req);
2438}
2439
5aea3dcd
ID		 2440static void cancel_request(struct ceph_osd_request *req)
2441{
2442 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2443
4609245e 2444 cancel_map_check(req);
45ee2c1d 2445 finish_request(req);
b18b9550 2446 complete_all(&req->r_completion);
c297eb42 2447 ceph_osdc_put_request(req);
5aea3dcd
ID		 2448}
2449
7cc5e38f
ID		 2450static void abort_request(struct ceph_osd_request *req, int err)
2451{
2452 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2453
2454 cancel_map_check(req);
2455 complete_request(req, err);
2456}
2457
66850df5
ID		 2458static int abort_fn(struct ceph_osd_request *req, void *arg)
2459{
2460 int err = *(int *)arg;
2461
2462 abort_request(req, err);
2463 return 0; /* continue iteration */
2464}
2465
2466/*
2467 * Abort all in-flight requests with @err and arrange for all future
2468 * requests to be failed immediately.
2469 */
2470void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2471{
2472 dout("%s osdc %p err %d\n", __func__, osdc, err);
2473 down_write(&osdc->lock);
2474 for_each_request(osdc, abort_fn, &err);
2475 osdc->abort_err = err;
2476 up_write(&osdc->lock);
2477}
2478EXPORT_SYMBOL(ceph_osdc_abort_requests);
2479
58eb7932
JL		 2480static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2481{
2482 if (likely(eb > osdc->epoch_barrier)) {
2483 dout("updating epoch_barrier from %u to %u\n",
2484 osdc->epoch_barrier, eb);
2485 osdc->epoch_barrier = eb;
2486 /* Request map if we're not to the barrier yet */
2487 if (eb > osdc->osdmap->epoch)
2488 maybe_request_map(osdc);
2489 }
2490}
2491
2492void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2493{
2494 down_read(&osdc->lock);
2495 if (unlikely(eb > osdc->epoch_barrier)) {
2496 up_read(&osdc->lock);
2497 down_write(&osdc->lock);
2498 update_epoch_barrier(osdc, eb);
2499 up_write(&osdc->lock);
2500 } else {
2501 up_read(&osdc->lock);
2502 }
2503}
2504EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2505
4eea0fef
ID		 2506/*
2507 * We can end up releasing caps as a result of abort_request().
2508 * In that case, we probably want to ensure that the cap release message
2509 * has an updated epoch barrier in it, so set the epoch barrier prior to
2510 * aborting the first request.
2511 */
2512static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2513{
2514 struct ceph_osd_client *osdc = req->r_osdc;
2515 bool *victims = arg;
2516
c843d13c 2517 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
4eea0fef 2518 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
690f951d 2519 pool_full(osdc, req->r_t.base_oloc.pool))) {
4eea0fef
ID		 2520 if (!*victims) {
2521 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2522 *victims = true;
2523 }
2524 abort_request(req, -ENOSPC);
2525 }
2526
2527 return 0; /* continue iteration */
2528}
2529
fc36d0a4
JL		 2530/*
2531 * Drop all pending requests that are stalled waiting on a full condition to
58eb7932
JL		 2532 * clear, and complete them with ENOSPC as the return code. Set the
2533 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2534 * cancelled.
fc36d0a4
JL		 2535 */
2536static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2537{
58eb7932 2538 bool victims = false;
fc36d0a4 2539
02b2f549 2540 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
c843d13c 2541 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
4eea0fef 2542 for_each_request(osdc, abort_on_full_fn, &victims);
fc36d0a4
JL		 2543}
2544
4609245e
ID		 2545static void check_pool_dne(struct ceph_osd_request *req)
2546{
2547 struct ceph_osd_client *osdc = req->r_osdc;
2548 struct ceph_osdmap *map = osdc->osdmap;
2549
2550 verify_osdc_wrlocked(osdc);
2551 WARN_ON(!map->epoch);
2552
2553 if (req->r_attempts) {
2554 /*
2555 * We sent a request earlier, which means that
2556 * previously the pool existed, and now it does not
2557 * (i.e., it was deleted).
2558 */
2559 req->r_map_dne_bound = map->epoch;
2560 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2561 req->r_tid);
2562 } else {
2563 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2564 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2565 }
2566
2567 if (req->r_map_dne_bound) {
2568 if (map->epoch >= req->r_map_dne_bound) {
2569 /* we had a new enough map */
2570 pr_info_ratelimited("tid %llu pool does not exist\n",
2571 req->r_tid);
2572 complete_request(req, -ENOENT);
2573 }
2574 } else {
2575 send_map_check(req);
2576 }
2577}
2578
2579static void map_check_cb(struct ceph_mon_generic_request *greq)
2580{
2581 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2582 struct ceph_osd_request *req;
2583 u64 tid = greq->private_data;
2584
2585 WARN_ON(greq->result || !greq->u.newest);
2586
2587 down_write(&osdc->lock);
2588 req = lookup_request_mc(&osdc->map_checks, tid);
2589 if (!req) {
2590 dout("%s tid %llu dne\n", __func__, tid);
2591 goto out_unlock;
2592 }
2593
2594 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2595 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2596 if (!req->r_map_dne_bound)
2597 req->r_map_dne_bound = greq->u.newest;
2598 erase_request_mc(&osdc->map_checks, req);
2599 check_pool_dne(req);
2600
2601 ceph_osdc_put_request(req);
2602out_unlock:
2603 up_write(&osdc->lock);
2604}
2605
2606static void send_map_check(struct ceph_osd_request *req)
2607{
2608 struct ceph_osd_client *osdc = req->r_osdc;
2609 struct ceph_osd_request *lookup_req;
2610 int ret;
2611
2612 verify_osdc_wrlocked(osdc);
2613
2614 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2615 if (lookup_req) {
2616 WARN_ON(lookup_req != req);
2617 return;
2618 }
2619
2620 ceph_osdc_get_request(req);
2621 insert_request_mc(&osdc->map_checks, req);
2622 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2623 map_check_cb, req->r_tid);
2624 WARN_ON(ret);
2625}
2626
922dab61
ID		 2627/*
2628 * lingering requests, watch/notify v2 infrastructure
2629 */
2630static void linger_release(struct kref *kref)
2631{
2632 struct ceph_osd_linger_request *lreq =
2633 container_of(kref, struct ceph_osd_linger_request, kref);
2634
2635 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2636 lreq->reg_req, lreq->ping_req);
2637 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2638 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
4609245e 2639 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
922dab61 2640 WARN_ON(!list_empty(&lreq->scan_item));
b07d3c4b 2641 WARN_ON(!list_empty(&lreq->pending_lworks));
922dab61
ID		 2642 WARN_ON(lreq->osd);
2643
2644 if (lreq->reg_req)
2645 ceph_osdc_put_request(lreq->reg_req);
2646 if (lreq->ping_req)
2647 ceph_osdc_put_request(lreq->ping_req);
2648 target_destroy(&lreq->t);
2649 kfree(lreq);
2650}
2651
2652static void linger_put(struct ceph_osd_linger_request *lreq)
2653{
2654 if (lreq)
2655 kref_put(&lreq->kref, linger_release);
2656}
2657
2658static struct ceph_osd_linger_request *
2659linger_get(struct ceph_osd_linger_request *lreq)
2660{
2661 kref_get(&lreq->kref);
2662 return lreq;
2663}
2664
2665static struct ceph_osd_linger_request *
2666linger_alloc(struct ceph_osd_client *osdc)
2667{
2668 struct ceph_osd_linger_request *lreq;
2669
2670 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2671 if (!lreq)
2672 return NULL;
2673
2674 kref_init(&lreq->kref);
2675 mutex_init(&lreq->lock);
2676 RB_CLEAR_NODE(&lreq->node);
2677 RB_CLEAR_NODE(&lreq->osdc_node);
4609245e 2678 RB_CLEAR_NODE(&lreq->mc_node);
922dab61 2679 INIT_LIST_HEAD(&lreq->scan_item);
b07d3c4b 2680 INIT_LIST_HEAD(&lreq->pending_lworks);
922dab61 2681 init_completion(&lreq->reg_commit_wait);
19079203 2682 init_completion(&lreq->notify_finish_wait);
922dab61
ID		 2683
2684 lreq->osdc = osdc;
2685 target_init(&lreq->t);
2686
2687 dout("%s lreq %p\n", __func__, lreq);
2688 return lreq;
2689}
2690
2691DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2692DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
4609245e 2693DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
922dab61
ID		 2694
2695/*
2696 * Create linger request <-> OSD session relation.
2697 *
2698 * @lreq has to be registered, @osd may be homeless.
2699 */
2700static void link_linger(struct ceph_osd *osd,
2701 struct ceph_osd_linger_request *lreq)
2702{
2703 verify_osd_locked(osd);
2704 WARN_ON(!lreq->linger_id || lreq->osd);
2705 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2706 osd->o_osd, lreq, lreq->linger_id);
2707
2708 if (!osd_homeless(osd))
2709 __remove_osd_from_lru(osd);
2710 else
2711 atomic_inc(&osd->o_osdc->num_homeless);
2712
2713 get_osd(osd);
2714 insert_linger(&osd->o_linger_requests, lreq);
2715 lreq->osd = osd;
2716}
2717
2718static void unlink_linger(struct ceph_osd *osd,
2719 struct ceph_osd_linger_request *lreq)
2720{
2721 verify_osd_locked(osd);
2722 WARN_ON(lreq->osd != osd);
2723 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2724 osd->o_osd, lreq, lreq->linger_id);
2725
2726 lreq->osd = NULL;
2727 erase_linger(&osd->o_linger_requests, lreq);
2728 put_osd(osd);
2729
2730 if (!osd_homeless(osd))
2731 maybe_move_osd_to_lru(osd);
2732 else
2733 atomic_dec(&osd->o_osdc->num_homeless);
2734}
2735
2736static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2737{
2738 verify_osdc_locked(lreq->osdc);
2739
2740 return !RB_EMPTY_NODE(&lreq->osdc_node);
2741}
2742
2743static bool linger_registered(struct ceph_osd_linger_request *lreq)
2744{
2745 struct ceph_osd_client *osdc = lreq->osdc;
2746 bool registered;
2747
2748 down_read(&osdc->lock);
2749 registered = __linger_registered(lreq);
2750 up_read(&osdc->lock);
2751
2752 return registered;
2753}
2754
2755static void linger_register(struct ceph_osd_linger_request *lreq)
2756{
2757 struct ceph_osd_client *osdc = lreq->osdc;
2758
2759 verify_osdc_wrlocked(osdc);
2760 WARN_ON(lreq->linger_id);
2761
2762 linger_get(lreq);
2763 lreq->linger_id = ++osdc->last_linger_id;
2764 insert_linger_osdc(&osdc->linger_requests, lreq);
2765}
2766
2767static void linger_unregister(struct ceph_osd_linger_request *lreq)
2768{
2769 struct ceph_osd_client *osdc = lreq->osdc;
2770
2771 verify_osdc_wrlocked(osdc);
2772
2773 erase_linger_osdc(&osdc->linger_requests, lreq);
2774 linger_put(lreq);
2775}
2776
2777static void cancel_linger_request(struct ceph_osd_request *req)
2778{
2779 struct ceph_osd_linger_request *lreq = req->r_priv;
2780
2781 WARN_ON(!req->r_linger);
2782 cancel_request(req);
2783 linger_put(lreq);
2784}
2785
2786struct linger_work {
2787 struct work_struct work;
2788 struct ceph_osd_linger_request *lreq;
b07d3c4b
ID		 2789 struct list_head pending_item;
2790 unsigned long queued_stamp;
922dab61
ID		 2791
2792 union {
2793 struct {
2794 u64 notify_id;
2795 u64 notifier_id;
2796 void *payload; /* points into @msg front */
2797 size_t payload_len;
2798
2799 struct ceph_msg *msg; /* for ceph_msg_put() */
2800 } notify;
2801 struct {
2802 int err;
2803 } error;
2804 };
2805};
2806
2807static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2808 work_func_t workfn)
2809{
2810 struct linger_work *lwork;
2811
2812 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2813 if (!lwork)
2814 return NULL;
2815
2816 INIT_WORK(&lwork->work, workfn);
b07d3c4b 2817 INIT_LIST_HEAD(&lwork->pending_item);
922dab61
ID		 2818 lwork->lreq = linger_get(lreq);
2819
2820 return lwork;
2821}
2822
2823static void lwork_free(struct linger_work *lwork)
2824{
2825 struct ceph_osd_linger_request *lreq = lwork->lreq;
2826
b07d3c4b
ID		 2827 mutex_lock(&lreq->lock);
2828 list_del(&lwork->pending_item);
2829 mutex_unlock(&lreq->lock);
2830
922dab61
ID		 2831 linger_put(lreq);
2832 kfree(lwork);
2833}
2834
2835static void lwork_queue(struct linger_work *lwork)
2836{
2837 struct ceph_osd_linger_request *lreq = lwork->lreq;
2838 struct ceph_osd_client *osdc = lreq->osdc;
2839
2840 verify_lreq_locked(lreq);
b07d3c4b
ID		 2841 WARN_ON(!list_empty(&lwork->pending_item));
2842
2843 lwork->queued_stamp = jiffies;
2844 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
922dab61
ID		 2845 queue_work(osdc->notify_wq, &lwork->work);
2846}
2847
2848static void do_watch_notify(struct work_struct *w)
2849{
2850 struct linger_work *lwork = container_of(w, struct linger_work, work);
2851 struct ceph_osd_linger_request *lreq = lwork->lreq;
2852
2853 if (!linger_registered(lreq)) {
2854 dout("%s lreq %p not registered\n", __func__, lreq);
2855 goto out;
2856 }
2857
19079203 2858 WARN_ON(!lreq->is_watch);
922dab61
ID		 2859 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2860 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2861 lwork->notify.payload_len);
2862 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2863 lwork->notify.notifier_id, lwork->notify.payload,
2864 lwork->notify.payload_len);
2865
2866out:
2867 ceph_msg_put(lwork->notify.msg);
2868 lwork_free(lwork);
2869}
2870
2871static void do_watch_error(struct work_struct *w)
2872{
2873 struct linger_work *lwork = container_of(w, struct linger_work, work);
2874 struct ceph_osd_linger_request *lreq = lwork->lreq;
2875
2876 if (!linger_registered(lreq)) {
2877 dout("%s lreq %p not registered\n", __func__, lreq);
2878 goto out;
2879 }
2880
2881 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2882 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2883
2884out:
2885 lwork_free(lwork);
2886}
2887
2888static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2889{
2890 struct linger_work *lwork;
2891
2892 lwork = lwork_alloc(lreq, do_watch_error);
2893 if (!lwork) {
2894 pr_err("failed to allocate error-lwork\n");
2895 return;
2896 }
2897
2898 lwork->error.err = lreq->last_error;
2899 lwork_queue(lwork);
2900}
2901
2902static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2903 int result)
2904{
2905 if (!completion_done(&lreq->reg_commit_wait)) {
2906 lreq->reg_commit_error = (result <= 0 ? result : 0);
2907 complete_all(&lreq->reg_commit_wait);
2908 }
2909}
2910
2911static void linger_commit_cb(struct ceph_osd_request *req)
2912{
2913 struct ceph_osd_linger_request *lreq = req->r_priv;
2914
2915 mutex_lock(&lreq->lock);
2916 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2917 lreq->linger_id, req->r_result);
922dab61
ID		 2918 linger_reg_commit_complete(lreq, req->r_result);
2919 lreq->committed = true;
2920
19079203
ID		 2921 if (!lreq->is_watch) {
2922 struct ceph_osd_data *osd_data =
2923 osd_req_op_data(req, 0, notify, response_data);
2924 void *p = page_address(osd_data->pages[0]);
2925
2926 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2927 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2928
2929 /* make note of the notify_id */
2930 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2931 lreq->notify_id = ceph_decode_64(&p);
2932 dout("lreq %p notify_id %llu\n", lreq,
2933 lreq->notify_id);
2934 } else {
2935 dout("lreq %p no notify_id\n", lreq);
2936 }
2937 }
2938
922dab61
ID		 2939 mutex_unlock(&lreq->lock);
2940 linger_put(lreq);
2941}
2942
2943static int normalize_watch_error(int err)
2944{
2945 /*
2946 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2947 * notification and a failure to reconnect because we raced with
2948 * the delete appear the same to the user.
2949 */
2950 if (err == -ENOENT)
2951 err = -ENOTCONN;
2952
2953 return err;
2954}
2955
2956static void linger_reconnect_cb(struct ceph_osd_request *req)
2957{
2958 struct ceph_osd_linger_request *lreq = req->r_priv;
2959
2960 mutex_lock(&lreq->lock);
2961 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2962 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2963 if (req->r_result < 0) {
2964 if (!lreq->last_error) {
2965 lreq->last_error = normalize_watch_error(req->r_result);
2966 queue_watch_error(lreq);
2967 }
2968 }
2969
2970 mutex_unlock(&lreq->lock);
2971 linger_put(lreq);
2972}
2973
2974static void send_linger(struct ceph_osd_linger_request *lreq)
2975{
2976 struct ceph_osd_request *req = lreq->reg_req;
2977 struct ceph_osd_req_op *op = &req->r_ops[0];
2978
2979 verify_osdc_wrlocked(req->r_osdc);
2980 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2981
2982 if (req->r_osd)
2983 cancel_linger_request(req);
2984
2985 request_reinit(req);
2986 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2987 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2988 req->r_flags = lreq->t.flags;
2989 req->r_mtime = lreq->mtime;
2990
2991 mutex_lock(&lreq->lock);
19079203 2992 if (lreq->is_watch && lreq->committed) {
922dab61
ID		 2993 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2994 op->watch.cookie != lreq->linger_id);
2995 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2996 op->watch.gen = ++lreq->register_gen;
2997 dout("lreq %p reconnect register_gen %u\n", lreq,
2998 op->watch.gen);
2999 req->r_callback = linger_reconnect_cb;
3000 } else {
19079203
ID		 3001 if (!lreq->is_watch)
3002 lreq->notify_id = 0;
3003 else
3004 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 3005 dout("lreq %p register\n", lreq);
3006 req->r_callback = linger_commit_cb;
3007 }
3008 mutex_unlock(&lreq->lock);
3009
3010 req->r_priv = linger_get(lreq);
3011 req->r_linger = true;
3012
3013 submit_request(req, true);
3014}
3015
3016static void linger_ping_cb(struct ceph_osd_request *req)
3017{
3018 struct ceph_osd_linger_request *lreq = req->r_priv;
3019
3020 mutex_lock(&lreq->lock);
3021 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3022 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3023 lreq->last_error);
3024 if (lreq->register_gen == req->r_ops[0].watch.gen) {
b07d3c4b
ID		 3025 if (!req->r_result) {
3026 lreq->watch_valid_thru = lreq->ping_sent;
3027 } else if (!lreq->last_error) {
922dab61
ID		 3028 lreq->last_error = normalize_watch_error(req->r_result);
3029 queue_watch_error(lreq);
3030 }
3031 } else {
3032 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3033 lreq->register_gen, req->r_ops[0].watch.gen);
3034 }
3035
3036 mutex_unlock(&lreq->lock);
3037 linger_put(lreq);
3038}
3039
3040static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3041{
3042 struct ceph_osd_client *osdc = lreq->osdc;
3043 struct ceph_osd_request *req = lreq->ping_req;
3044 struct ceph_osd_req_op *op = &req->r_ops[0];
3045
b7ec35b3 3046 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
922dab61
ID		 3047 dout("%s PAUSERD\n", __func__);
3048 return;
3049 }
3050
3051 lreq->ping_sent = jiffies;
3052 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3053 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3054 lreq->register_gen);
3055
3056 if (req->r_osd)
3057 cancel_linger_request(req);
3058
3059 request_reinit(req);
3060 target_copy(&req->r_t, &lreq->t);
3061
3062 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3063 op->watch.cookie != lreq->linger_id ||
3064 op->watch.op != CEPH_OSD_WATCH_OP_PING);
3065 op->watch.gen = lreq->register_gen;
3066 req->r_callback = linger_ping_cb;
3067 req->r_priv = linger_get(lreq);
3068 req->r_linger = true;
3069
3070 ceph_osdc_get_request(req);
3071 account_request(req);
3072 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3073 link_request(lreq->osd, req);
3074 send_request(req);
3075}
3076
3077static void linger_submit(struct ceph_osd_linger_request *lreq)
3078{
3079 struct ceph_osd_client *osdc = lreq->osdc;
3080 struct ceph_osd *osd;
3081
81c65213
ID		 3082 down_write(&osdc->lock);
3083 linger_register(lreq);
3084 if (lreq->is_watch) {
3085 lreq->reg_req->r_ops[0].watch.cookie = lreq->linger_id;
3086 lreq->ping_req->r_ops[0].watch.cookie = lreq->linger_id;
3087 } else {
3088 lreq->reg_req->r_ops[0].notify.cookie = lreq->linger_id;
3089 }
3090
7de030d6 3091 calc_target(osdc, &lreq->t, NULL, false);
922dab61
ID		 3092 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3093 link_linger(osd, lreq);
3094
3095 send_linger(lreq);
81c65213 3096 up_write(&osdc->lock);
922dab61
ID		 3097}
3098
4609245e
ID		 3099static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3100{
3101 struct ceph_osd_client *osdc = lreq->osdc;
3102 struct ceph_osd_linger_request *lookup_lreq;
3103
3104 verify_osdc_wrlocked(osdc);
3105
3106 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3107 lreq->linger_id);
3108 if (!lookup_lreq)
3109 return;
3110
3111 WARN_ON(lookup_lreq != lreq);
3112 erase_linger_mc(&osdc->linger_map_checks, lreq);
3113 linger_put(lreq);
3114}
3115
922dab61
ID		 3116/*
3117 * @lreq has to be both registered and linked.
3118 */
3119static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3120{
19079203 3121 if (lreq->is_watch && lreq->ping_req->r_osd)
922dab61
ID		 3122 cancel_linger_request(lreq->ping_req);
3123 if (lreq->reg_req->r_osd)
3124 cancel_linger_request(lreq->reg_req);
4609245e 3125 cancel_linger_map_check(lreq);
922dab61
ID		 3126 unlink_linger(lreq->osd, lreq);
3127 linger_unregister(lreq);
3128}
3129
3130static void linger_cancel(struct ceph_osd_linger_request *lreq)
3131{
3132 struct ceph_osd_client *osdc = lreq->osdc;
3133
3134 down_write(&osdc->lock);
3135 if (__linger_registered(lreq))
3136 __linger_cancel(lreq);
3137 up_write(&osdc->lock);
3138}
3139
4609245e
ID		 3140static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3141
3142static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3143{
3144 struct ceph_osd_client *osdc = lreq->osdc;
3145 struct ceph_osdmap *map = osdc->osdmap;
3146
3147 verify_osdc_wrlocked(osdc);
3148 WARN_ON(!map->epoch);
3149
3150 if (lreq->register_gen) {
3151 lreq->map_dne_bound = map->epoch;
3152 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3153 lreq, lreq->linger_id);
3154 } else {
3155 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3156 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3157 map->epoch);
3158 }
3159
3160 if (lreq->map_dne_bound) {
3161 if (map->epoch >= lreq->map_dne_bound) {
3162 /* we had a new enough map */
3163 pr_info("linger_id %llu pool does not exist\n",
3164 lreq->linger_id);
3165 linger_reg_commit_complete(lreq, -ENOENT);
3166 __linger_cancel(lreq);
3167 }
3168 } else {
3169 send_linger_map_check(lreq);
3170 }
3171}
3172
3173static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3174{
3175 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3176 struct ceph_osd_linger_request *lreq;
3177 u64 linger_id = greq->private_data;
3178
3179 WARN_ON(greq->result || !greq->u.newest);
3180
3181 down_write(&osdc->lock);
3182 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3183 if (!lreq) {
3184 dout("%s linger_id %llu dne\n", __func__, linger_id);
3185 goto out_unlock;
3186 }
3187
3188 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3189 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3190 greq->u.newest);
3191 if (!lreq->map_dne_bound)
3192 lreq->map_dne_bound = greq->u.newest;
3193 erase_linger_mc(&osdc->linger_map_checks, lreq);
3194 check_linger_pool_dne(lreq);
3195
3196 linger_put(lreq);
3197out_unlock:
3198 up_write(&osdc->lock);
3199}
3200
3201static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3202{
3203 struct ceph_osd_client *osdc = lreq->osdc;
3204 struct ceph_osd_linger_request *lookup_lreq;
3205 int ret;
3206
3207 verify_osdc_wrlocked(osdc);
3208
3209 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3210 lreq->linger_id);
3211 if (lookup_lreq) {
3212 WARN_ON(lookup_lreq != lreq);
3213 return;
3214 }
3215
3216 linger_get(lreq);
3217 insert_linger_mc(&osdc->linger_map_checks, lreq);
3218 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3219 linger_map_check_cb, lreq->linger_id);
3220 WARN_ON(ret);
3221}
3222
922dab61
ID		 3223static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3224{
3225 int ret;
3226
3227 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3228 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3229 return ret ?: lreq->reg_commit_error;
3230}
3231
19079203
ID		 3232static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3233{
3234 int ret;
3235
3236 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3237 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3238 return ret ?: lreq->notify_finish_error;
3239}
3240
f24e9980 3241/*
fbca9635
ID		 3242 * Timeout callback, called every N seconds. When 1 or more OSD
3243 * requests has been active for more than N seconds, we send a keepalive
3244 * (tag + timestamp) to its OSD to ensure any communications channel
3245 * reset is detected.
f24e9980
SW		 3246 */
3247static void handle_timeout(struct work_struct *work)
3248{
3249 struct ceph_osd_client *osdc =
3250 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 3251 struct ceph_options *opts = osdc->client->options;
5aea3dcd 3252 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
7cc5e38f 3253 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
5aea3dcd
ID		 3254 LIST_HEAD(slow_osds);
3255 struct rb_node *n, *p;
f24e9980 3256
5aea3dcd
ID		 3257 dout("%s osdc %p\n", __func__, osdc);
3258 down_write(&osdc->lock);
f24e9980 3259
422d2cb8
YS		 3260 /*
3261 * ping osds that are a bit slow. this ensures that if there
3262 * is a break in the TCP connection we will notice, and reopen
3263 * a connection with that osd (from the fault callback).
3264 */
5aea3dcd
ID		 3265 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3266 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3267 bool found = false;
3268
7cc5e38f 3269 for (p = rb_first(&osd->o_requests); p; ) {
5aea3dcd
ID		 3270 struct ceph_osd_request *req =
3271 rb_entry(p, struct ceph_osd_request, r_node);
3272
7cc5e38f
ID		 3273 p = rb_next(p); /* abort_request() */
3274
5aea3dcd
ID		 3275 if (time_before(req->r_stamp, cutoff)) {
3276 dout(" req %p tid %llu on osd%d is laggy\n",
3277 req, req->r_tid, osd->o_osd);
3278 found = true;
3279 }
7cc5e38f
ID		 3280 if (opts->osd_request_timeout &&
3281 time_before(req->r_start_stamp, expiry_cutoff)) {
3282 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3283 req->r_tid, osd->o_osd);
3284 abort_request(req, -ETIMEDOUT);
3285 }
5aea3dcd 3286 }
922dab61
ID		 3287 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3288 struct ceph_osd_linger_request *lreq =
3289 rb_entry(p, struct ceph_osd_linger_request, node);
3290
3291 dout(" lreq %p linger_id %llu is served by osd%d\n",
3292 lreq, lreq->linger_id, osd->o_osd);
3293 found = true;
3294
3295 mutex_lock(&lreq->lock);
19079203 3296 if (lreq->is_watch && lreq->committed && !lreq->last_error)
922dab61
ID		 3297 send_linger_ping(lreq);
3298 mutex_unlock(&lreq->lock);
3299 }
422d2cb8 3300
5aea3dcd
ID		 3301 if (found)
3302 list_move_tail(&osd->o_keepalive_item, &slow_osds);
422d2cb8 3303 }
5aea3dcd 3304
7cc5e38f
ID		 3305 if (opts->osd_request_timeout) {
3306 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3307 struct ceph_osd_request *req =
3308 rb_entry(p, struct ceph_osd_request, r_node);
3309
3310 p = rb_next(p); /* abort_request() */
3311
3312 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3313 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3314 req->r_tid, osdc->homeless_osd.o_osd);
3315 abort_request(req, -ETIMEDOUT);
3316 }
3317 }
3318 }
3319
5aea3dcd
ID		 3320 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3321 maybe_request_map(osdc);
3322
422d2cb8 3323 while (!list_empty(&slow_osds)) {
5aea3dcd
ID		 3324 struct ceph_osd *osd = list_first_entry(&slow_osds,
3325 struct ceph_osd,
3326 o_keepalive_item);
422d2cb8 3327 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 3328 ceph_con_keepalive(&osd->o_con);
3329 }
3330
5aea3dcd 3331 up_write(&osdc->lock);
fbca9635
ID		 3332 schedule_delayed_work(&osdc->timeout_work,
3333 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 3334}
3335
f5a2041b
YS		 3336static void handle_osds_timeout(struct work_struct *work)
3337{
3338 struct ceph_osd_client *osdc =
3339 container_of(work, struct ceph_osd_client,
3340 osds_timeout_work.work);
a319bf56 3341 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 3342 struct ceph_osd *osd, *nosd;
f5a2041b 3343
42a2c09f 3344 dout("%s osdc %p\n", __func__, osdc);
5aea3dcd 3345 down_write(&osdc->lock);
42a2c09f
ID		 3346 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3347 if (time_before(jiffies, osd->lru_ttl))
3348 break;
3349
5aea3dcd 3350 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 3351 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
5aea3dcd 3352 close_osd(osd);
42a2c09f 3353 }
f5a2041b 3354
5aea3dcd 3355 up_write(&osdc->lock);
f5a2041b
YS		 3356 schedule_delayed_work(&osdc->osds_timeout_work,
3357 round_jiffies_relative(delay));
3358}
3359
205ee118
ID		 3360static int ceph_oloc_decode(void **p, void *end,
3361 struct ceph_object_locator *oloc)
3362{
3363 u8 struct_v, struct_cv;
3364 u32 len;
3365 void *struct_end;
3366 int ret = 0;
3367
3368 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3369 struct_v = ceph_decode_8(p);
3370 struct_cv = ceph_decode_8(p);
3371 if (struct_v < 3) {
3372 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3373 struct_v, struct_cv);
3374 goto e_inval;
3375 }
3376 if (struct_cv > 6) {
3377 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3378 struct_v, struct_cv);
3379 goto e_inval;
3380 }
3381 len = ceph_decode_32(p);
3382 ceph_decode_need(p, end, len, e_inval);
3383 struct_end = *p + len;
3384
3385 oloc->pool = ceph_decode_64(p);
3386 *p += 4; /* skip preferred */
3387
3388 len = ceph_decode_32(p);
3389 if (len > 0) {
3390 pr_warn("ceph_object_locator::key is set\n");
3391 goto e_inval;
3392 }
3393
3394 if (struct_v >= 5) {
cd08e0a2
YZ		 3395 bool changed = false;
3396
205ee118
ID		 3397 len = ceph_decode_32(p);
3398 if (len > 0) {
30c156d9 3399 ceph_decode_need(p, end, len, e_inval);
cd08e0a2
YZ		 3400 if (!oloc->pool_ns ||
3401 ceph_compare_string(oloc->pool_ns, *p, len))
3402 changed = true;
30c156d9 3403 *p += len;
cd08e0a2
YZ		 3404 } else {
3405 if (oloc->pool_ns)
3406 changed = true;
3407 }
3408 if (changed) {
3409 /* redirect changes namespace */
3410 pr_warn("ceph_object_locator::nspace is changed\n");
3411 goto e_inval;
205ee118
ID		 3412 }
3413 }
3414
3415 if (struct_v >= 6) {
3416 s64 hash = ceph_decode_64(p);
3417 if (hash != -1) {
3418 pr_warn("ceph_object_locator::hash is set\n");
3419 goto e_inval;
3420 }
3421 }
3422
3423 /* skip the rest */
3424 *p = struct_end;
3425out:
3426 return ret;
3427
3428e_inval:
3429 ret = -EINVAL;
3430 goto out;
3431}
3432
3433static int ceph_redirect_decode(void **p, void *end,
3434 struct ceph_request_redirect *redir)
3435{
3436 u8 struct_v, struct_cv;
3437 u32 len;
3438 void *struct_end;
3439 int ret;
3440
3441 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3442 struct_v = ceph_decode_8(p);
3443 struct_cv = ceph_decode_8(p);
3444 if (struct_cv > 1) {
3445 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3446 struct_v, struct_cv);
3447 goto e_inval;
3448 }
3449 len = ceph_decode_32(p);
3450 ceph_decode_need(p, end, len, e_inval);
3451 struct_end = *p + len;
3452
3453 ret = ceph_oloc_decode(p, end, &redir->oloc);
3454 if (ret)
3455 goto out;
3456
3457 len = ceph_decode_32(p);
3458 if (len > 0) {
3459 pr_warn("ceph_request_redirect::object_name is set\n");
3460 goto e_inval;
3461 }
3462
3463 len = ceph_decode_32(p);
3464 *p += len; /* skip osd_instructions */
3465
3466 /* skip the rest */
3467 *p = struct_end;
3468out:
3469 return ret;
3470
3471e_inval:
3472 ret = -EINVAL;
3473 goto out;
3474}
3475
fe5da05e
ID		 3476struct MOSDOpReply {
3477 struct ceph_pg pgid;
3478 u64 flags;
3479 int result;
3480 u32 epoch;
3481 int num_ops;
3482 u32 outdata_len[CEPH_OSD_MAX_OPS];
3483 s32 rval[CEPH_OSD_MAX_OPS];
3484 int retry_attempt;
3485 struct ceph_eversion replay_version;
3486 u64 user_version;
3487 struct ceph_request_redirect redirect;
3488};
25845472 3489
fe5da05e 3490static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 3491{
fe5da05e
ID		 3492 void *p = msg->front.iov_base;
3493 void *const end = p + msg->front.iov_len;
3494 u16 version = le16_to_cpu(msg->hdr.version);
3495 struct ceph_eversion bad_replay_version;
b0b31a8f 3496 u8 decode_redir;
fe5da05e
ID		 3497 u32 len;
3498 int ret;
3499 int i;
1b83bef2 3500
fe5da05e
ID		 3501 ceph_decode_32_safe(&p, end, len, e_inval);
3502 ceph_decode_need(&p, end, len, e_inval);
3503 p += len; /* skip oid */
1b83bef2 3504
fe5da05e
ID		 3505 ret = ceph_decode_pgid(&p, end, &m->pgid);
3506 if (ret)
3507 return ret;
1b83bef2 3508
fe5da05e
ID		 3509 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3510 ceph_decode_32_safe(&p, end, m->result, e_inval);
3511 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3512 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3513 p += sizeof(bad_replay_version);
3514 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 3515
fe5da05e
ID		 3516 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3517 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3518 goto e_inval;
1b83bef2 3519
fe5da05e
ID		 3520 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3521 e_inval);
3522 for (i = 0; i < m->num_ops; i++) {
1b83bef2 3523 struct ceph_osd_op *op = p;
1b83bef2 3524
fe5da05e 3525 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 3526 p += sizeof(*op);
3527 }
1b83bef2 3528
fe5da05e
ID		 3529 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3530 for (i = 0; i < m->num_ops; i++)
3531 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 3532
fe5da05e
ID		 3533 if (version >= 5) {
3534 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3535 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3536 p += sizeof(m->replay_version);
3537 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3538 } else {
3539 m->replay_version = bad_replay_version; /* struct */
3540 m->user_version = le64_to_cpu(m->replay_version.version);
3541 }
eb845ff1 3542
fe5da05e
ID		 3543 if (version >= 6) {
3544 if (version >= 7)
3545 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 3546 else
3547 decode_redir = 1;
3548 } else {
3549 decode_redir = 0;
3550 }
3551
3552 if (decode_redir) {
fe5da05e
ID		 3553 ret = ceph_redirect_decode(&p, end, &m->redirect);
3554 if (ret)
3555 return ret;
205ee118 3556 } else {
fe5da05e 3557 ceph_oloc_init(&m->redirect.oloc);
205ee118 3558 }
f24e9980 3559
fe5da05e
ID		 3560 return 0;
3561
3562e_inval:
3563 return -EINVAL;
3564}
3565
3566/*
b18b9550
ID		 3567 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3568 * specified.
fe5da05e 3569 */
5aea3dcd 3570static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
fe5da05e 3571{
5aea3dcd 3572 struct ceph_osd_client *osdc = osd->o_osdc;
fe5da05e
ID		 3573 struct ceph_osd_request *req;
3574 struct MOSDOpReply m;
3575 u64 tid = le64_to_cpu(msg->hdr.tid);
3576 u32 data_len = 0;
fe5da05e
ID		 3577 int ret;
3578 int i;
3579
3580 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3581
5aea3dcd
ID		 3582 down_read(&osdc->lock);
3583 if (!osd_registered(osd)) {
3584 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3585 goto out_unlock_osdc;
3586 }
3587 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3588
3589 mutex_lock(&osd->lock);
3590 req = lookup_request(&osd->o_requests, tid);
fe5da05e 3591 if (!req) {
5aea3dcd
ID		 3592 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3593 goto out_unlock_session;
fe5da05e 3594 }
fe5da05e 3595
cd08e0a2 3596 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
fe5da05e 3597 ret = decode_MOSDOpReply(msg, &m);
cd08e0a2 3598 m.redirect.oloc.pool_ns = NULL;
fe5da05e
ID		 3599 if (ret) {
3600 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3601 req->r_tid, ret);
3602 ceph_msg_dump(msg);
3603 goto fail_request;
3604 }
3605 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3606 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3607 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3608 le64_to_cpu(m.replay_version.version), m.user_version);
3609
3610 if (m.retry_attempt >= 0) {
3611 if (m.retry_attempt != req->r_attempts - 1) {
3612 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3613 req, req->r_tid, m.retry_attempt,
3614 req->r_attempts - 1);
5aea3dcd 3615 goto out_unlock_session;
fe5da05e
ID		 3616 }
3617 } else {
3618 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3619 }
3620
3621 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3622 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3623 m.redirect.oloc.pool);
5aea3dcd
ID		 3624 unlink_request(osd, req);
3625 mutex_unlock(&osd->lock);
205ee118 3626
30c156d9
YZ		 3627 /*
3628 * Not ceph_oloc_copy() - changing pool_ns is not
3629 * supported.
3630 */
3631 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
5aea3dcd
ID		 3632 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
3633 req->r_tid = 0;
3634 __submit_request(req, false);
3635 goto out_unlock_osdc;
205ee118
ID		 3636 }
3637
fe5da05e
ID		 3638 if (m.num_ops != req->r_num_ops) {
3639 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3640 req->r_num_ops, req->r_tid);
3641 goto fail_request;
f24e9980 3642 }
fe5da05e
ID		 3643 for (i = 0; i < req->r_num_ops; i++) {
3644 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3645 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3646 req->r_ops[i].rval = m.rval[i];
3647 req->r_ops[i].outdata_len = m.outdata_len[i];
3648 data_len += m.outdata_len[i];
3649 }
3650 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3651 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3652 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3653 goto fail_request;
3654 }
b18b9550
ID		 3655 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3656 req, req->r_tid, m.result, data_len);
f24e9980 3657
b18b9550
ID		 3658 /*
3659 * Since we only ever request ONDISK, we should only ever get
3660 * one (type of) reply back.
3661 */
3662 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3663 req->r_result = m.result ?: data_len;
3664 finish_request(req);
5aea3dcd
ID		 3665 mutex_unlock(&osd->lock);
3666 up_read(&osdc->lock);
f24e9980 3667
b18b9550 3668 __complete_request(req);
f24e9980
SW		 3669 return;
3670
fe5da05e 3671fail_request:
4609245e 3672 complete_request(req, -EIO);
5aea3dcd
ID		 3673out_unlock_session:
3674 mutex_unlock(&osd->lock);
3675out_unlock_osdc:
3676 up_read(&osdc->lock);
f24e9980
SW		 3677}
3678
42c1b124
ID		 3679static void set_pool_was_full(struct ceph_osd_client *osdc)
3680{
3681 struct rb_node *n;
3682
3683 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3684 struct ceph_pg_pool_info *pi =
3685 rb_entry(n, struct ceph_pg_pool_info, node);
3686
3687 pi->was_full = __pool_full(pi);
3688 }
3689}
3690
5aea3dcd 3691static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
f24e9980 3692{
5aea3dcd 3693 struct ceph_pg_pool_info *pi;
f24e9980 3694
5aea3dcd
ID		 3695 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3696 if (!pi)
3697 return false;
f24e9980 3698
5aea3dcd 3699 return pi->was_full && !__pool_full(pi);
422d2cb8
YS		 3700}
3701
922dab61
ID		 3702static enum calc_target_result
3703recalc_linger_target(struct ceph_osd_linger_request *lreq)
3704{
3705 struct ceph_osd_client *osdc = lreq->osdc;
3706 enum calc_target_result ct_res;
3707
7de030d6 3708 ct_res = calc_target(osdc, &lreq->t, NULL, true);
922dab61
ID		 3709 if (ct_res == CALC_TARGET_NEED_RESEND) {
3710 struct ceph_osd *osd;
3711
3712 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3713 if (osd != lreq->osd) {
3714 unlink_linger(lreq->osd, lreq);
3715 link_linger(osd, lreq);
3716 }
3717 }
3718
3719 return ct_res;
3720}
3721
422d2cb8 3722/*
5aea3dcd 3723 * Requeue requests whose mapping to an OSD has changed.
422d2cb8 3724 */
5aea3dcd
ID		 3725static void scan_requests(struct ceph_osd *osd,
3726 bool force_resend,
3727 bool cleared_full,
3728 bool check_pool_cleared_full,
3729 struct rb_root *need_resend,
3730 struct list_head *need_resend_linger)
422d2cb8 3731{
5aea3dcd
ID		 3732 struct ceph_osd_client *osdc = osd->o_osdc;
3733 struct rb_node *n;
3734 bool force_resend_writes;
3735
922dab61
ID		 3736 for (n = rb_first(&osd->o_linger_requests); n; ) {
3737 struct ceph_osd_linger_request *lreq =
3738 rb_entry(n, struct ceph_osd_linger_request, node);
3739 enum calc_target_result ct_res;
3740
3741 n = rb_next(n); /* recalc_linger_target() */
3742
3743 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3744 lreq->linger_id);
3745 ct_res = recalc_linger_target(lreq);
3746 switch (ct_res) {
3747 case CALC_TARGET_NO_ACTION:
3748 force_resend_writes = cleared_full ||
3749 (check_pool_cleared_full &&
3750 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3751 if (!force_resend && !force_resend_writes)
3752 break;
3753
3754 /* fall through */
3755 case CALC_TARGET_NEED_RESEND:
4609245e 3756 cancel_linger_map_check(lreq);
922dab61
ID		 3757 /*
3758 * scan_requests() for the previous epoch(s)
3759 * may have already added it to the list, since
3760 * it's not unlinked here.
3761 */
3762 if (list_empty(&lreq->scan_item))
3763 list_add_tail(&lreq->scan_item, need_resend_linger);
3764 break;
3765 case CALC_TARGET_POOL_DNE:
a10bcb19 3766 list_del_init(&lreq->scan_item);
4609245e 3767 check_linger_pool_dne(lreq);
922dab61
ID		 3768 break;
3769 }
3770 }
3771
5aea3dcd
ID		 3772 for (n = rb_first(&osd->o_requests); n; ) {
3773 struct ceph_osd_request *req =
3774 rb_entry(n, struct ceph_osd_request, r_node);
3775 enum calc_target_result ct_res;
3776
4609245e 3777 n = rb_next(n); /* unlink_request(), check_pool_dne() */
5aea3dcd
ID		 3778
3779 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
7de030d6
ID		 3780 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
3781 false);
5aea3dcd
ID		 3782 switch (ct_res) {
3783 case CALC_TARGET_NO_ACTION:
3784 force_resend_writes = cleared_full ||
3785 (check_pool_cleared_full &&
3786 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3787 if (!force_resend &&
3788 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3789 !force_resend_writes))
3790 break;
3791
3792 /* fall through */
3793 case CALC_TARGET_NEED_RESEND:
4609245e 3794 cancel_map_check(req);
5aea3dcd
ID		 3795 unlink_request(osd, req);
3796 insert_request(need_resend, req);
3797 break;
3798 case CALC_TARGET_POOL_DNE:
4609245e 3799 check_pool_dne(req);
5aea3dcd 3800 break;
b0494532 3801 }
6f6c7006 3802 }
422d2cb8 3803}
6f6c7006 3804
42c1b124 3805static int handle_one_map(struct ceph_osd_client *osdc,
5aea3dcd
ID		 3806 void *p, void *end, bool incremental,
3807 struct rb_root *need_resend,
3808 struct list_head *need_resend_linger)
42c1b124
ID		 3809{
3810 struct ceph_osdmap *newmap;
3811 struct rb_node *n;
3812 bool skipped_map = false;
3813 bool was_full;
3814
b7ec35b3 3815 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
42c1b124
ID		 3816 set_pool_was_full(osdc);
3817
3818 if (incremental)
3819 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3820 else
3821 newmap = ceph_osdmap_decode(&p, end);
3822 if (IS_ERR(newmap))
3823 return PTR_ERR(newmap);
3824
3825 if (newmap != osdc->osdmap) {
3826 /*
3827 * Preserve ->was_full before destroying the old map.
3828 * For pools that weren't in the old map, ->was_full
3829 * should be false.
3830 */
3831 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3832 struct ceph_pg_pool_info *pi =
3833 rb_entry(n, struct ceph_pg_pool_info, node);
3834 struct ceph_pg_pool_info *old_pi;
3835
3836 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3837 if (old_pi)
3838 pi->was_full = old_pi->was_full;
3839 else
3840 WARN_ON(pi->was_full);
3841 }
3842
3843 if (osdc->osdmap->epoch &&
3844 osdc->osdmap->epoch + 1 < newmap->epoch) {
3845 WARN_ON(incremental);
3846 skipped_map = true;
3847 }
3848
3849 ceph_osdmap_destroy(osdc->osdmap);
3850 osdc->osdmap = newmap;
3851 }
3852
b7ec35b3 3853 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
5aea3dcd
ID		 3854 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3855 need_resend, need_resend_linger);
3856
3857 for (n = rb_first(&osdc->osds); n; ) {
3858 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3859
3860 n = rb_next(n); /* close_osd() */
3861
3862 scan_requests(osd, skipped_map, was_full, true, need_resend,
3863 need_resend_linger);
3864 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3865 memcmp(&osd->o_con.peer_addr,
3866 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3867 sizeof(struct ceph_entity_addr)))
3868 close_osd(osd);
3869 }
42c1b124
ID		 3870
3871 return 0;
3872}
6f6c7006 3873
5aea3dcd
ID		 3874static void kick_requests(struct ceph_osd_client *osdc,
3875 struct rb_root *need_resend,
3876 struct list_head *need_resend_linger)
3877{
922dab61 3878 struct ceph_osd_linger_request *lreq, *nlreq;
04c7d789 3879 enum calc_target_result ct_res;
5aea3dcd
ID		 3880 struct rb_node *n;
3881
04c7d789
ID		 3882 /* make sure need_resend targets reflect latest map */
3883 for (n = rb_first(need_resend); n; ) {
3884 struct ceph_osd_request *req =
3885 rb_entry(n, struct ceph_osd_request, r_node);
3886
3887 n = rb_next(n);
3888
3889 if (req->r_t.epoch < osdc->osdmap->epoch) {
3890 ct_res = calc_target(osdc, &req->r_t, NULL, false);
3891 if (ct_res == CALC_TARGET_POOL_DNE) {
3892 erase_request(need_resend, req);
3893 check_pool_dne(req);
3894 }
3895 }
3896 }
3897
5aea3dcd
ID		 3898 for (n = rb_first(need_resend); n; ) {
3899 struct ceph_osd_request *req =
3900 rb_entry(n, struct ceph_osd_request, r_node);
3901 struct ceph_osd *osd;
3902
3903 n = rb_next(n);
3904 erase_request(need_resend, req); /* before link_request() */
3905
5aea3dcd
ID		 3906 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3907 link_request(osd, req);
3908 if (!req->r_linger) {
3909 if (!osd_homeless(osd) && !req->r_t.paused)
3910 send_request(req);
922dab61
ID		 3911 } else {
3912 cancel_linger_request(req);
5aea3dcd
ID		 3913 }
3914 }
922dab61
ID		 3915
3916 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3917 if (!osd_homeless(lreq->osd))
3918 send_linger(lreq);
3919
3920 list_del_init(&lreq->scan_item);
3921 }
5aea3dcd
ID		 3922}
3923
f24e9980
SW		 3924/*
3925 * Process updated osd map.
3926 *
3927 * The message contains any number of incremental and full maps, normally
3928 * indicating some sort of topology change in the cluster. Kick requests
3929 * off to different OSDs as needed.
3930 */
3931void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3932{
42c1b124
ID		 3933 void *p = msg->front.iov_base;
3934 void *const end = p + msg->front.iov_len;
f24e9980
SW		 3935 u32 nr_maps, maplen;
3936 u32 epoch;
f24e9980 3937 struct ceph_fsid fsid;
5aea3dcd
ID		 3938 struct rb_root need_resend = RB_ROOT;
3939 LIST_HEAD(need_resend_linger);
42c1b124
ID		 3940 bool handled_incremental = false;
3941 bool was_pauserd, was_pausewr;
3942 bool pauserd, pausewr;
3943 int err;
f24e9980 3944
42c1b124 3945 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
5aea3dcd 3946 down_write(&osdc->lock);
f24e9980
SW		 3947
3948 /* verify fsid */
3949 ceph_decode_need(&p, end, sizeof(fsid), bad);
3950 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 3951 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 3952 goto bad;
f24e9980 3953
b7ec35b3
ID		 3954 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3955 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3956 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3957 have_pool_full(osdc);
9a1ea2db 3958
f24e9980
SW		 3959 /* incremental maps */
3960 ceph_decode_32_safe(&p, end, nr_maps, bad);
3961 dout(" %d inc maps\n", nr_maps);
3962 while (nr_maps > 0) {
3963 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3964 epoch = ceph_decode_32(&p);
3965 maplen = ceph_decode_32(&p);
f24e9980 3966 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 3967 if (osdc->osdmap->epoch &&
3968 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 3969 dout("applying incremental map %u len %d\n",
3970 epoch, maplen);
5aea3dcd
ID		 3971 err = handle_one_map(osdc, p, p + maplen, true,
3972 &need_resend, &need_resend_linger);
42c1b124 3973 if (err)
f24e9980 3974 goto bad;
42c1b124 3975 handled_incremental = true;
f24e9980
SW		 3976 } else {
3977 dout("ignoring incremental map %u len %d\n",
3978 epoch, maplen);
3979 }
42c1b124 3980 p += maplen;
f24e9980
SW		 3981 nr_maps--;
3982 }
42c1b124 3983 if (handled_incremental)
f24e9980
SW		 3984 goto done;
3985
3986 /* full maps */
3987 ceph_decode_32_safe(&p, end, nr_maps, bad);
3988 dout(" %d full maps\n", nr_maps);
3989 while (nr_maps) {
3990 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3991 epoch = ceph_decode_32(&p);
3992 maplen = ceph_decode_32(&p);
f24e9980
SW		 3993 ceph_decode_need(&p, end, maplen, bad);
3994 if (nr_maps > 1) {
3995 dout("skipping non-latest full map %u len %d\n",
3996 epoch, maplen);
e5253a7b 3997 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 3998 dout("skipping full map %u len %d, "
3999 "older than our %u\n", epoch, maplen,
4000 osdc->osdmap->epoch);
4001 } else {
4002 dout("taking full map %u len %d\n", epoch, maplen);
5aea3dcd
ID		 4003 err = handle_one_map(osdc, p, p + maplen, false,
4004 &need_resend, &need_resend_linger);
42c1b124 4005 if (err)
f24e9980 4006 goto bad;
f24e9980
SW		 4007 }
4008 p += maplen;
4009 nr_maps--;
4010 }
4011
4012done:
cd634fb6
SW		 4013 /*
4014 * subscribe to subsequent osdmap updates if full to ensure
4015 * we find out when we are no longer full and stop returning
4016 * ENOSPC.
4017 */
b7ec35b3
ID		 4018 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4019 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4020 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 4021 have_pool_full(osdc);
58eb7932
JL		 4022 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4023 osdc->osdmap->epoch < osdc->epoch_barrier)
42c1b124 4024 maybe_request_map(osdc);
cd634fb6 4025
5aea3dcd 4026 kick_requests(osdc, &need_resend, &need_resend_linger);
42c1b124 4027
fc36d0a4 4028 ceph_osdc_abort_on_full(osdc);
42c1b124
ID		 4029 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4030 osdc->osdmap->epoch);
5aea3dcd 4031 up_write(&osdc->lock);
03066f23 4032 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 4033 return;
4034
4035bad:
4036 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 4037 ceph_msg_dump(msg);
5aea3dcd
ID		 4038 up_write(&osdc->lock);
4039}
4040
4041/*
4042 * Resubmit requests pending on the given osd.
4043 */
4044static void kick_osd_requests(struct ceph_osd *osd)
4045{
4046 struct rb_node *n;
4047
a02a946d
ID		 4048 clear_backoffs(osd);
4049
922dab61 4050 for (n = rb_first(&osd->o_requests); n; ) {
5aea3dcd
ID		 4051 struct ceph_osd_request *req =
4052 rb_entry(n, struct ceph_osd_request, r_node);
4053
922dab61
ID		 4054 n = rb_next(n); /* cancel_linger_request() */
4055
5aea3dcd
ID		 4056 if (!req->r_linger) {
4057 if (!req->r_t.paused)
4058 send_request(req);
922dab61
ID		 4059 } else {
4060 cancel_linger_request(req);
5aea3dcd
ID		 4061 }
4062 }
922dab61
ID		 4063 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4064 struct ceph_osd_linger_request *lreq =
4065 rb_entry(n, struct ceph_osd_linger_request, node);
4066
4067 send_linger(lreq);
4068 }
5aea3dcd
ID		 4069}
4070
4071/*
4072 * If the osd connection drops, we need to resubmit all requests.
4073 */
4074static void osd_fault(struct ceph_connection *con)
4075{
4076 struct ceph_osd *osd = con->private;
4077 struct ceph_osd_client *osdc = osd->o_osdc;
4078
4079 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4080
4081 down_write(&osdc->lock);
4082 if (!osd_registered(osd)) {
4083 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4084 goto out_unlock;
4085 }
4086
4087 if (!reopen_osd(osd))
4088 kick_osd_requests(osd);
4089 maybe_request_map(osdc);
4090
4091out_unlock:
4092 up_write(&osdc->lock);
f24e9980
SW		 4093}
4094
a02a946d
ID		 4095struct MOSDBackoff {
4096 struct ceph_spg spgid;
4097 u32 map_epoch;
4098 u8 op;
4099 u64 id;
4100 struct ceph_hobject_id *begin;
4101 struct ceph_hobject_id *end;
4102};
4103
4104static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4105{
4106 void *p = msg->front.iov_base;
4107 void *const end = p + msg->front.iov_len;
4108 u8 struct_v;
4109 u32 struct_len;
4110 int ret;
4111
4112 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4113 if (ret)
4114 return ret;
4115
4116 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4117 if (ret)
4118 return ret;
4119
4120 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4121 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4122 ceph_decode_8_safe(&p, end, m->op, e_inval);
4123 ceph_decode_64_safe(&p, end, m->id, e_inval);
4124
4125 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4126 if (!m->begin)
4127 return -ENOMEM;
4128
4129 ret = decode_hoid(&p, end, m->begin);
4130 if (ret) {
4131 free_hoid(m->begin);
4132 return ret;
4133 }
4134
4135 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4136 if (!m->end) {
4137 free_hoid(m->begin);
4138 return -ENOMEM;
4139 }
4140
4141 ret = decode_hoid(&p, end, m->end);
4142 if (ret) {
4143 free_hoid(m->begin);
4144 free_hoid(m->end);
4145 return ret;
4146 }
4147
4148 return 0;
4149
4150e_inval:
4151 return -EINVAL;
4152}
4153
4154static struct ceph_msg *create_backoff_message(
4155 const struct ceph_osd_backoff *backoff,
4156 u32 map_epoch)
4157{
4158 struct ceph_msg *msg;
4159 void *p, *end;
4160 int msg_size;
4161
4162 msg_size = CEPH_ENCODING_START_BLK_LEN +
4163 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4164 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4165 msg_size += CEPH_ENCODING_START_BLK_LEN +
4166 hoid_encoding_size(backoff->begin);
4167 msg_size += CEPH_ENCODING_START_BLK_LEN +
4168 hoid_encoding_size(backoff->end);
4169
4170 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4171 if (!msg)
4172 return NULL;
4173
4174 p = msg->front.iov_base;
4175 end = p + msg->front_alloc_len;
4176
4177 encode_spgid(&p, &backoff->spgid);
4178 ceph_encode_32(&p, map_epoch);
4179 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4180 ceph_encode_64(&p, backoff->id);
4181 encode_hoid(&p, end, backoff->begin);
4182 encode_hoid(&p, end, backoff->end);
4183 BUG_ON(p != end);
4184
4185 msg->front.iov_len = p - msg->front.iov_base;
4186 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4187 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4188
4189 return msg;
4190}
4191
4192static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4193{
4194 struct ceph_spg_mapping *spg;
4195 struct ceph_osd_backoff *backoff;
4196 struct ceph_msg *msg;
4197
4198 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4199 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4200
4201 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4202 if (!spg) {
4203 spg = alloc_spg_mapping();
4204 if (!spg) {
4205 pr_err("%s failed to allocate spg\n", __func__);
4206 return;
4207 }
4208 spg->spgid = m->spgid; /* struct */
4209 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4210 }
4211
4212 backoff = alloc_backoff();
4213 if (!backoff) {
4214 pr_err("%s failed to allocate backoff\n", __func__);
4215 return;
4216 }
4217 backoff->spgid = m->spgid; /* struct */
4218 backoff->id = m->id;
4219 backoff->begin = m->begin;
4220 m->begin = NULL; /* backoff now owns this */
4221 backoff->end = m->end;
4222 m->end = NULL; /* ditto */
4223
4224 insert_backoff(&spg->backoffs, backoff);
4225 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4226
4227 /*
4228 * Ack with original backoff's epoch so that the OSD can
4229 * discard this if there was a PG split.
4230 */
4231 msg = create_backoff_message(backoff, m->map_epoch);
4232 if (!msg) {
4233 pr_err("%s failed to allocate msg\n", __func__);
4234 return;
4235 }
4236 ceph_con_send(&osd->o_con, msg);
4237}
4238
4239static bool target_contained_by(const struct ceph_osd_request_target *t,
4240 const struct ceph_hobject_id *begin,
4241 const struct ceph_hobject_id *end)
4242{
4243 struct ceph_hobject_id hoid;
4244 int cmp;
4245
4246 hoid_fill_from_target(&hoid, t);
4247 cmp = hoid_compare(&hoid, begin);
4248 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4249}
4250
4251static void handle_backoff_unblock(struct ceph_osd *osd,
4252 const struct MOSDBackoff *m)
4253{
4254 struct ceph_spg_mapping *spg;
4255 struct ceph_osd_backoff *backoff;
4256 struct rb_node *n;
4257
4258 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4259 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4260
4261 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4262 if (!backoff) {
4263 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4264 __func__, osd->o_osd, m->spgid.pgid.pool,
4265 m->spgid.pgid.seed, m->spgid.shard, m->id);
4266 return;
4267 }
4268
4269 if (hoid_compare(backoff->begin, m->begin) &&
4270 hoid_compare(backoff->end, m->end)) {
4271 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4272 __func__, osd->o_osd, m->spgid.pgid.pool,
4273 m->spgid.pgid.seed, m->spgid.shard, m->id);
4274 /* unblock it anyway... */
4275 }
4276
4277 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4278 BUG_ON(!spg);
4279
4280 erase_backoff(&spg->backoffs, backoff);
4281 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4282 free_backoff(backoff);
4283
4284 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4285 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4286 free_spg_mapping(spg);
4287 }
4288
4289 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4290 struct ceph_osd_request *req =
4291 rb_entry(n, struct ceph_osd_request, r_node);
4292
4293 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4294 /*
4295 * Match against @m, not @backoff -- the PG may
4296 * have split on the OSD.
4297 */
4298 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4299 /*
4300 * If no other installed backoff applies,
4301 * resend.
4302 */
4303 send_request(req);
4304 }
4305 }
4306 }
4307}
4308
4309static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4310{
4311 struct ceph_osd_client *osdc = osd->o_osdc;
4312 struct MOSDBackoff m;
4313 int ret;
4314
4315 down_read(&osdc->lock);
4316 if (!osd_registered(osd)) {
4317 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4318 up_read(&osdc->lock);
4319 return;
4320 }
4321 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4322
4323 mutex_lock(&osd->lock);
4324 ret = decode_MOSDBackoff(msg, &m);
4325 if (ret) {
4326 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4327 ceph_msg_dump(msg);
4328 goto out_unlock;
4329 }
4330
4331 switch (m.op) {
4332 case CEPH_OSD_BACKOFF_OP_BLOCK:
4333 handle_backoff_block(osd, &m);
4334 break;
4335 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4336 handle_backoff_unblock(osd, &m);
4337 break;
4338 default:
4339 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4340 }
4341
4342 free_hoid(m.begin);
4343 free_hoid(m.end);
4344
4345out_unlock:
4346 mutex_unlock(&osd->lock);
4347 up_read(&osdc->lock);
4348}
4349
a40c4f10
YS		 4350/*
4351 * Process osd watch notifications
4352 */
3c663bbd
AE		 4353static void handle_watch_notify(struct ceph_osd_client *osdc,
4354 struct ceph_msg *msg)
a40c4f10 4355{
922dab61
ID		 4356 void *p = msg->front.iov_base;
4357 void *const end = p + msg->front.iov_len;
4358 struct ceph_osd_linger_request *lreq;
4359 struct linger_work *lwork;
4360 u8 proto_ver, opcode;
4361 u64 cookie, notify_id;
4362 u64 notifier_id = 0;
19079203 4363 s32 return_code = 0;
922dab61
ID		 4364 void *payload = NULL;
4365 u32 payload_len = 0;
a40c4f10
YS		 4366
4367 ceph_decode_8_safe(&p, end, proto_ver, bad);
4368 ceph_decode_8_safe(&p, end, opcode, bad);
4369 ceph_decode_64_safe(&p, end, cookie, bad);
922dab61 4370 p += 8; /* skip ver */
a40c4f10
YS		 4371 ceph_decode_64_safe(&p, end, notify_id, bad);
4372
922dab61
ID		 4373 if (proto_ver >= 1) {
4374 ceph_decode_32_safe(&p, end, payload_len, bad);
4375 ceph_decode_need(&p, end, payload_len, bad);
4376 payload = p;
4377 p += payload_len;
4378 }
4379
4380 if (le16_to_cpu(msg->hdr.version) >= 2)
19079203 4381 ceph_decode_32_safe(&p, end, return_code, bad);
922dab61
ID		 4382
4383 if (le16_to_cpu(msg->hdr.version) >= 3)
4384 ceph_decode_64_safe(&p, end, notifier_id, bad);
4385
4386 down_read(&osdc->lock);
4387 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4388 if (!lreq) {
4389 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4390 cookie);
4391 goto out_unlock_osdc;
4392 }
4393
4394 mutex_lock(&lreq->lock);
19079203
ID		 4395 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4396 opcode, cookie, lreq, lreq->is_watch);
922dab61
ID		 4397 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4398 if (!lreq->last_error) {
4399 lreq->last_error = -ENOTCONN;
4400 queue_watch_error(lreq);
4401 }
19079203
ID		 4402 } else if (!lreq->is_watch) {
4403 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4404 if (lreq->notify_id && lreq->notify_id != notify_id) {
4405 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4406 lreq->notify_id, notify_id);
4407 } else if (!completion_done(&lreq->notify_finish_wait)) {
4408 struct ceph_msg_data *data =
0d9c1ab3 4409 msg->num_data_items ? &msg->data[0] : NULL;
19079203
ID		 4410
4411 if (data) {
4412 if (lreq->preply_pages) {
4413 WARN_ON(data->type !=
4414 CEPH_MSG_DATA_PAGES);
4415 *lreq->preply_pages = data->pages;
4416 *lreq->preply_len = data->length;
4417 } else {
4418 ceph_release_page_vector(data->pages,
4419 calc_pages_for(0, data->length));
4420 }
4421 }
4422 lreq->notify_finish_error = return_code;
4423 complete_all(&lreq->notify_finish_wait);
4424 }
922dab61
ID		 4425 } else {
4426 /* CEPH_WATCH_EVENT_NOTIFY */
4427 lwork = lwork_alloc(lreq, do_watch_notify);
4428 if (!lwork) {
4429 pr_err("failed to allocate notify-lwork\n");
4430 goto out_unlock_lreq;
a40c4f10 4431 }
a40c4f10 4432
922dab61
ID		 4433 lwork->notify.notify_id = notify_id;
4434 lwork->notify.notifier_id = notifier_id;
4435 lwork->notify.payload = payload;
4436 lwork->notify.payload_len = payload_len;
4437 lwork->notify.msg = ceph_msg_get(msg);
4438 lwork_queue(lwork);
91883cd2 4439 }
a40c4f10 4440
922dab61
ID		 4441out_unlock_lreq:
4442 mutex_unlock(&lreq->lock);
4443out_unlock_osdc:
4444 up_read(&osdc->lock);
a40c4f10
YS		 4445 return;
4446
4447bad:
4448 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 4449}
4450
70636773
AE		 4451/*
4452 * Register request, send initial attempt.
4453 */
4454int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4455 struct ceph_osd_request *req,
4456 bool nofail)
4457{
5aea3dcd
ID		 4458 down_read(&osdc->lock);
4459 submit_request(req, false);
4460 up_read(&osdc->lock);
0bbfdfe8 4461
5aea3dcd 4462 return 0;
f24e9980 4463}
3d14c5d2 4464EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 4465
c9f9b93d 4466/*
c297eb42
ID		 4467 * Unregister a registered request. The request is not completed:
4468 * ->r_result isn't set and __complete_request() isn't called.
c9f9b93d
ID		 4469 */
4470void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4471{
4472 struct ceph_osd_client *osdc = req->r_osdc;
4473
5aea3dcd 4474 down_write(&osdc->lock);
5aea3dcd
ID		 4475 if (req->r_osd)
4476 cancel_request(req);
4477 up_write(&osdc->lock);
c9f9b93d
ID		 4478}
4479EXPORT_SYMBOL(ceph_osdc_cancel_request);
4480
f24e9980 4481/*
42b06965 4482 * @timeout: in jiffies, 0 means "wait forever"
f24e9980 4483 */
42b06965
ID		 4484static int wait_request_timeout(struct ceph_osd_request *req,
4485 unsigned long timeout)
f24e9980 4486{
42b06965 4487 long left;
c9f9b93d 4488
42b06965 4489 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
0e76abf2 4490 left = wait_for_completion_killable_timeout(&req->r_completion,
42b06965
ID		 4491 ceph_timeout_jiffies(timeout));
4492 if (left <= 0) {
4493 left = left ?: -ETIMEDOUT;
c9f9b93d 4494 ceph_osdc_cancel_request(req);
42b06965
ID		 4495 } else {
4496 left = req->r_result; /* completed */
f24e9980
SW		 4497 }
4498
42b06965
ID		 4499 return left;
4500}
4501
4502/*
4503 * wait for a request to complete
4504 */
4505int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4506 struct ceph_osd_request *req)
4507{
4508 return wait_request_timeout(req, 0);
f24e9980 4509}
3d14c5d2 4510EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 4511
4512/*
4513 * sync - wait for all in-flight requests to flush. avoid starvation.
4514 */
4515void ceph_osdc_sync(struct ceph_osd_client *osdc)
4516{
5aea3dcd
ID		 4517 struct rb_node *n, *p;
4518 u64 last_tid = atomic64_read(&osdc->last_tid);
f24e9980 4519
5aea3dcd
ID		 4520again:
4521 down_read(&osdc->lock);
4522 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4523 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4524
4525 mutex_lock(&osd->lock);
4526 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4527 struct ceph_osd_request *req =
4528 rb_entry(p, struct ceph_osd_request, r_node);
4529
4530 if (req->r_tid > last_tid)
4531 break;
4532
4533 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4534 continue;
f24e9980 4535
5aea3dcd
ID		 4536 ceph_osdc_get_request(req);
4537 mutex_unlock(&osd->lock);
4538 up_read(&osdc->lock);
4539 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4540 __func__, req, req->r_tid, last_tid);
b18b9550 4541 wait_for_completion(&req->r_completion);
5aea3dcd
ID		 4542 ceph_osdc_put_request(req);
4543 goto again;
4544 }
f24e9980 4545
5aea3dcd 4546 mutex_unlock(&osd->lock);
f24e9980 4547 }
5aea3dcd
ID		 4548
4549 up_read(&osdc->lock);
4550 dout("%s done last_tid %llu\n", __func__, last_tid);
f24e9980 4551}
3d14c5d2 4552EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 4553
922dab61
ID		 4554static struct ceph_osd_request *
4555alloc_linger_request(struct ceph_osd_linger_request *lreq)
4556{
4557 struct ceph_osd_request *req;
4558
4559 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4560 if (!req)
4561 return NULL;
4562
4563 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4564 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
922dab61
ID		 4565 return req;
4566}
4567
39e58c34
ID		 4568static struct ceph_osd_request *
4569alloc_watch_request(struct ceph_osd_linger_request *lreq, u8 watch_opcode)
4570{
4571 struct ceph_osd_request *req;
4572
4573 req = alloc_linger_request(lreq);
4574 if (!req)
4575 return NULL;
4576
4577 /*
4578 * Pass 0 for cookie because we don't know it yet, it will be
4579 * filled in by linger_submit().
4580 */
4581 osd_req_op_watch_init(req, 0, 0, watch_opcode);
26f887e0
ID		 4582
4583 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4584 ceph_osdc_put_request(req);
4585 return NULL;
4586 }
4587
39e58c34
ID		 4588 return req;
4589}
4590
922dab61
ID		 4591/*
4592 * Returns a handle, caller owns a ref.
4593 */
4594struct ceph_osd_linger_request *
4595ceph_osdc_watch(struct ceph_osd_client *osdc,
4596 struct ceph_object_id *oid,
4597 struct ceph_object_locator *oloc,
4598 rados_watchcb2_t wcb,
4599 rados_watcherrcb_t errcb,
4600 void *data)
4601{
4602 struct ceph_osd_linger_request *lreq;
4603 int ret;
4604
4605 lreq = linger_alloc(osdc);
4606 if (!lreq)
4607 return ERR_PTR(-ENOMEM);
4608
19079203 4609 lreq->is_watch = true;
922dab61
ID		 4610 lreq->wcb = wcb;
4611 lreq->errcb = errcb;
4612 lreq->data = data;
b07d3c4b 4613 lreq->watch_valid_thru = jiffies;
922dab61
ID		 4614
4615 ceph_oid_copy(&lreq->t.base_oid, oid);
4616 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
54ea0046 4617 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
fac02ddf 4618 ktime_get_real_ts64(&lreq->mtime);
922dab61 4619
39e58c34 4620 lreq->reg_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 4621 if (!lreq->reg_req) {
4622 ret = -ENOMEM;
4623 goto err_put_lreq;
4624 }
4625
39e58c34 4626 lreq->ping_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_PING);
922dab61
ID		 4627 if (!lreq->ping_req) {
4628 ret = -ENOMEM;
4629 goto err_put_lreq;
4630 }
4631
81c65213 4632 linger_submit(lreq);
922dab61
ID		 4633 ret = linger_reg_commit_wait(lreq);
4634 if (ret) {
4635 linger_cancel(lreq);
4636 goto err_put_lreq;
4637 }
4638
4639 return lreq;
4640
4641err_put_lreq:
4642 linger_put(lreq);
4643 return ERR_PTR(ret);
4644}
4645EXPORT_SYMBOL(ceph_osdc_watch);
4646
4647/*
4648 * Releases a ref.
4649 *
4650 * Times out after mount_timeout to preserve rbd unmap behaviour
4651 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4652 * with mount_timeout").
4653 */
4654int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4655 struct ceph_osd_linger_request *lreq)
4656{
4657 struct ceph_options *opts = osdc->client->options;
4658 struct ceph_osd_request *req;
4659 int ret;
4660
4661 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4662 if (!req)
4663 return -ENOMEM;
4664
4665 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4666 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
54ea0046 4667 req->r_flags = CEPH_OSD_FLAG_WRITE;
fac02ddf 4668 ktime_get_real_ts64(&req->r_mtime);
922dab61
ID		 4669 osd_req_op_watch_init(req, 0, lreq->linger_id,
4670 CEPH_OSD_WATCH_OP_UNWATCH);
4671
4672 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4673 if (ret)
4674 goto out_put_req;
4675
4676 ceph_osdc_start_request(osdc, req, false);
4677 linger_cancel(lreq);
4678 linger_put(lreq);
4679 ret = wait_request_timeout(req, opts->mount_timeout);
4680
4681out_put_req:
4682 ceph_osdc_put_request(req);
4683 return ret;
4684}
4685EXPORT_SYMBOL(ceph_osdc_unwatch);
4686
4687static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4688 u64 notify_id, u64 cookie, void *payload,
6d54228f 4689 u32 payload_len)
922dab61
ID		 4690{
4691 struct ceph_osd_req_op *op;
4692 struct ceph_pagelist *pl;
4693 int ret;
4694
4695 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4696
33165d47 4697 pl = ceph_pagelist_alloc(GFP_NOIO);
922dab61
ID		 4698 if (!pl)
4699 return -ENOMEM;
4700
922dab61
ID		 4701 ret = ceph_pagelist_encode_64(pl, notify_id);
4702 ret |= ceph_pagelist_encode_64(pl, cookie);
4703 if (payload) {
4704 ret |= ceph_pagelist_encode_32(pl, payload_len);
4705 ret |= ceph_pagelist_append(pl, payload, payload_len);
4706 } else {
4707 ret |= ceph_pagelist_encode_32(pl, 0);
4708 }
4709 if (ret) {
4710 ceph_pagelist_release(pl);
4711 return -ENOMEM;
4712 }
4713
4714 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4715 op->indata_len = pl->length;
4716 return 0;
4717}
4718
4719int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4720 struct ceph_object_id *oid,
4721 struct ceph_object_locator *oloc,
4722 u64 notify_id,
4723 u64 cookie,
4724 void *payload,
6d54228f 4725 u32 payload_len)
922dab61
ID		 4726{
4727 struct ceph_osd_request *req;
4728 int ret;
4729
4730 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4731 if (!req)
4732 return -ENOMEM;
4733
4734 ceph_oid_copy(&req->r_base_oid, oid);
4735 ceph_oloc_copy(&req->r_base_oloc, oloc);
4736 req->r_flags = CEPH_OSD_FLAG_READ;
4737
26f887e0
ID		 4738 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4739 payload_len);
922dab61
ID		 4740 if (ret)
4741 goto out_put_req;
4742
26f887e0 4743 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
922dab61
ID		 4744 if (ret)
4745 goto out_put_req;
4746
4747 ceph_osdc_start_request(osdc, req, false);
4748 ret = ceph_osdc_wait_request(osdc, req);
4749
4750out_put_req:
4751 ceph_osdc_put_request(req);
4752 return ret;
4753}
4754EXPORT_SYMBOL(ceph_osdc_notify_ack);
4755
19079203
ID		 4756static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4757 u64 cookie, u32 prot_ver, u32 timeout,
6d54228f 4758 void *payload, u32 payload_len)
19079203
ID		 4759{
4760 struct ceph_osd_req_op *op;
4761 struct ceph_pagelist *pl;
4762 int ret;
4763
4764 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4765 op->notify.cookie = cookie;
4766
33165d47 4767 pl = ceph_pagelist_alloc(GFP_NOIO);
19079203
ID		 4768 if (!pl)
4769 return -ENOMEM;
4770
19079203
ID		 4771 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4772 ret |= ceph_pagelist_encode_32(pl, timeout);
4773 ret |= ceph_pagelist_encode_32(pl, payload_len);
4774 ret |= ceph_pagelist_append(pl, payload, payload_len);
4775 if (ret) {
4776 ceph_pagelist_release(pl);
4777 return -ENOMEM;
4778 }
4779
4780 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4781 op->indata_len = pl->length;
4782 return 0;
4783}
4784
4785/*
4786 * @timeout: in seconds
4787 *
4788 * @preply_{pages,len} are initialized both on success and error.
4789 * The caller is responsible for:
4790 *
4791 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4792 */
4793int ceph_osdc_notify(struct ceph_osd_client *osdc,
4794 struct ceph_object_id *oid,
4795 struct ceph_object_locator *oloc,
4796 void *payload,
6d54228f 4797 u32 payload_len,
19079203
ID		 4798 u32 timeout,
4799 struct page ***preply_pages,
4800 size_t *preply_len)
4801{
4802 struct ceph_osd_linger_request *lreq;
4803 struct page **pages;
4804 int ret;
4805
4806 WARN_ON(!timeout);
4807 if (preply_pages) {
4808 *preply_pages = NULL;
4809 *preply_len = 0;
4810 }
4811
4812 lreq = linger_alloc(osdc);
4813 if (!lreq)
4814 return -ENOMEM;
4815
4816 lreq->preply_pages = preply_pages;
4817 lreq->preply_len = preply_len;
4818
4819 ceph_oid_copy(&lreq->t.base_oid, oid);
4820 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4821 lreq->t.flags = CEPH_OSD_FLAG_READ;
4822
4823 lreq->reg_req = alloc_linger_request(lreq);
4824 if (!lreq->reg_req) {
4825 ret = -ENOMEM;
4826 goto out_put_lreq;
4827 }
4828
81c65213
ID		 4829 /*
4830 * Pass 0 for cookie because we don't know it yet, it will be
4831 * filled in by linger_submit().
4832 */
4833 ret = osd_req_op_notify_init(lreq->reg_req, 0, 0, 1, timeout,
4834 payload, payload_len);
4835 if (ret)
4836 goto out_put_lreq;
4837
19079203
ID		 4838 /* for notify_id */
4839 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4840 if (IS_ERR(pages)) {
4841 ret = PTR_ERR(pages);
4842 goto out_put_lreq;
4843 }
19079203
ID		 4844 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4845 response_data),
4846 pages, PAGE_SIZE, 0, false, true);
19079203 4847
26f887e0
ID		 4848 ret = ceph_osdc_alloc_messages(lreq->reg_req, GFP_NOIO);
4849 if (ret)
4850 goto out_put_lreq;
4851
81c65213 4852 linger_submit(lreq);
19079203
ID		 4853 ret = linger_reg_commit_wait(lreq);
4854 if (!ret)
4855 ret = linger_notify_finish_wait(lreq);
4856 else
4857 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4858
4859 linger_cancel(lreq);
4860out_put_lreq:
4861 linger_put(lreq);
4862 return ret;
4863}
4864EXPORT_SYMBOL(ceph_osdc_notify);
4865
b07d3c4b
ID		 4866/*
4867 * Return the number of milliseconds since the watch was last
4868 * confirmed, or an error. If there is an error, the watch is no
4869 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4870 */
4871int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4872 struct ceph_osd_linger_request *lreq)
4873{
4874 unsigned long stamp, age;
4875 int ret;
4876
4877 down_read(&osdc->lock);
4878 mutex_lock(&lreq->lock);
4879 stamp = lreq->watch_valid_thru;
4880 if (!list_empty(&lreq->pending_lworks)) {
4881 struct linger_work *lwork =
4882 list_first_entry(&lreq->pending_lworks,
4883 struct linger_work,
4884 pending_item);
4885
4886 if (time_before(lwork->queued_stamp, stamp))
4887 stamp = lwork->queued_stamp;
4888 }
4889 age = jiffies - stamp;
4890 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4891 lreq, lreq->linger_id, age, lreq->last_error);
4892 /* we are truncating to msecs, so return a safe upper bound */
4893 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4894
4895 mutex_unlock(&lreq->lock);
4896 up_read(&osdc->lock);
4897 return ret;
4898}
4899
a4ed38d7
DF		 4900static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4901{
4902 u8 struct_v;
4903 u32 struct_len;
4904 int ret;
4905
4906 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4907 &struct_v, &struct_len);
4908 if (ret)
51fc7ab4
JL		 4909 goto bad;
4910
4911 ret = -EINVAL;
4912 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
4913 ceph_decode_64_safe(p, end, item->cookie, bad);
4914 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
a4ed38d7 4915
a4ed38d7 4916 if (struct_v >= 2) {
51fc7ab4
JL		 4917 ret = ceph_decode_entity_addr(p, end, &item->addr);
4918 if (ret)
4919 goto bad;
4920 } else {
4921 ret = 0;
a4ed38d7
DF		 4922 }
4923
4924 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4925 ENTITY_NAME(item->name), item->cookie,
b726ec97 4926 ceph_pr_addr(&item->addr));
51fc7ab4
JL		 4927bad:
4928 return ret;
a4ed38d7
DF		 4929}
4930
4931static int decode_watchers(void **p, void *end,
4932 struct ceph_watch_item **watchers,
4933 u32 *num_watchers)
4934{
4935 u8 struct_v;
4936 u32 struct_len;
4937 int i;
4938 int ret;
4939
4940 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4941 &struct_v, &struct_len);
4942 if (ret)
4943 return ret;
4944
4945 *num_watchers = ceph_decode_32(p);
4946 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4947 if (!*watchers)
4948 return -ENOMEM;
4949
4950 for (i = 0; i < *num_watchers; i++) {
4951 ret = decode_watcher(p, end, *watchers + i);
4952 if (ret) {
4953 kfree(*watchers);
4954 return ret;
4955 }
4956 }
4957
4958 return 0;
4959}
4960
4961/*
4962 * On success, the caller is responsible for:
4963 *
4964 * kfree(watchers);
4965 */
4966int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
4967 struct ceph_object_id *oid,
4968 struct ceph_object_locator *oloc,
4969 struct ceph_watch_item **watchers,
4970 u32 *num_watchers)
4971{
4972 struct ceph_osd_request *req;
4973 struct page **pages;
4974 int ret;
4975
4976 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4977 if (!req)
4978 return -ENOMEM;
4979
4980 ceph_oid_copy(&req->r_base_oid, oid);
4981 ceph_oloc_copy(&req->r_base_oloc, oloc);
4982 req->r_flags = CEPH_OSD_FLAG_READ;
4983
a4ed38d7
DF		 4984 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4985 if (IS_ERR(pages)) {
4986 ret = PTR_ERR(pages);
4987 goto out_put_req;
4988 }
4989
4990 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
4991 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
4992 response_data),
4993 pages, PAGE_SIZE, 0, false, true);
4994
26f887e0
ID		 4995 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4996 if (ret)
4997 goto out_put_req;
4998
a4ed38d7
DF		 4999 ceph_osdc_start_request(osdc, req, false);
5000 ret = ceph_osdc_wait_request(osdc, req);
5001 if (ret >= 0) {
5002 void *p = page_address(pages[0]);
5003 void *const end = p + req->r_ops[0].outdata_len;
5004
5005 ret = decode_watchers(&p, end, watchers, num_watchers);
5006 }
5007
5008out_put_req:
5009 ceph_osdc_put_request(req);
5010 return ret;
5011}
5012EXPORT_SYMBOL(ceph_osdc_list_watchers);
5013
dd935f44
JD		 5014/*
5015 * Call all pending notify callbacks - for use after a watch is
5016 * unregistered, to make sure no more callbacks for it will be invoked
5017 */
f6479449 5018void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44 5019{
99d16943 5020 dout("%s osdc %p\n", __func__, osdc);
dd935f44
JD		 5021 flush_workqueue(osdc->notify_wq);
5022}
5023EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5024
7cca78c9
ID		 5025void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5026{
5027 down_read(&osdc->lock);
5028 maybe_request_map(osdc);
5029 up_read(&osdc->lock);
5030}
5031EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
dd935f44 5032
428a7158
DF		 5033/*
5034 * Execute an OSD class method on an object.
5035 *
5036 * @flags: CEPH_OSD_FLAG_*
2544a020 5037 * @resp_len: in/out param for reply length
428a7158
DF		 5038 */
5039int ceph_osdc_call(struct ceph_osd_client *osdc,
5040 struct ceph_object_id *oid,
5041 struct ceph_object_locator *oloc,
5042 const char *class, const char *method,
5043 unsigned int flags,
5044 struct page *req_page, size_t req_len,
68ada915 5045 struct page **resp_pages, size_t *resp_len)
428a7158
DF		 5046{
5047 struct ceph_osd_request *req;
5048 int ret;
5049
68ada915 5050 if (req_len > PAGE_SIZE)
2544a020
ID		 5051 return -E2BIG;
5052
428a7158
DF		 5053 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5054 if (!req)
5055 return -ENOMEM;
5056
5057 ceph_oid_copy(&req->r_base_oid, oid);
5058 ceph_oloc_copy(&req->r_base_oloc, oloc);
5059 req->r_flags = flags;
5060
24639ce5 5061 ret = osd_req_op_cls_init(req, 0, class, method);
fe943d50
CX		 5062 if (ret)
5063 goto out_put_req;
5064
428a7158
DF		 5065 if (req_page)
5066 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5067 0, false, false);
68ada915
ID		 5068 if (resp_pages)
5069 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
2544a020 5070 *resp_len, 0, false, false);
428a7158 5071
26f887e0
ID		 5072 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5073 if (ret)
5074 goto out_put_req;
5075
428a7158
DF		 5076 ceph_osdc_start_request(osdc, req, false);
5077 ret = ceph_osdc_wait_request(osdc, req);
5078 if (ret >= 0) {
5079 ret = req->r_ops[0].rval;
68ada915 5080 if (resp_pages)
428a7158
DF		 5081 *resp_len = req->r_ops[0].outdata_len;
5082 }
5083
5084out_put_req:
5085 ceph_osdc_put_request(req);
5086 return ret;
5087}
5088EXPORT_SYMBOL(ceph_osdc_call);
5089
f24e9980
SW		 5090/*
5091 * init, shutdown
5092 */
5093int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5094{
5095 int err;
5096
5097 dout("init\n");
5098 osdc->client = client;
5aea3dcd 5099 init_rwsem(&osdc->lock);
f24e9980 5100 osdc->osds = RB_ROOT;
f5a2041b 5101 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 5102 spin_lock_init(&osdc->osd_lru_lock);
5aea3dcd
ID		 5103 osd_init(&osdc->homeless_osd);
5104 osdc->homeless_osd.o_osdc = osdc;
5105 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
264048af 5106 osdc->last_linger_id = CEPH_LINGER_ID_START;
922dab61 5107 osdc->linger_requests = RB_ROOT;
4609245e
ID		 5108 osdc->map_checks = RB_ROOT;
5109 osdc->linger_map_checks = RB_ROOT;
f24e9980 5110 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b
YS		 5111 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5112
5f44f142 5113 err = -ENOMEM;
e5253a7b
ID		 5114 osdc->osdmap = ceph_osdmap_alloc();
5115 if (!osdc->osdmap)
5116 goto out;
5117
9e767adb
ID		 5118 osdc->req_mempool = mempool_create_slab_pool(10,
5119 ceph_osd_request_cache);
f24e9980 5120 if (!osdc->req_mempool)
e5253a7b 5121 goto out_map;
f24e9980 5122
d50b409f 5123 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
0d9c1ab3 5124 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
f24e9980 5125 if (err < 0)
5f44f142 5126 goto out_mempool;
d50b409f 5127 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
0d9c1ab3
ID		 5128 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5129 "osd_op_reply");
c16e7869
SW		 5130 if (err < 0)
5131 goto out_msgpool;
a40c4f10 5132
dbcae088 5133 err = -ENOMEM;
a40c4f10 5134 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 5135 if (!osdc->notify_wq)
c172ec5c
ID		 5136 goto out_msgpool_reply;
5137
88bc1922
ID		 5138 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5139 if (!osdc->completion_wq)
5140 goto out_notify_wq;
5141
fbca9635
ID		 5142 schedule_delayed_work(&osdc->timeout_work,
5143 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 5144 schedule_delayed_work(&osdc->osds_timeout_work,
5145 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5146
f24e9980 5147 return 0;
5f44f142 5148
88bc1922
ID		 5149out_notify_wq:
5150 destroy_workqueue(osdc->notify_wq);
c172ec5c
ID		 5151out_msgpool_reply:
5152 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 5153out_msgpool:
5154 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 5155out_mempool:
5156 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 5157out_map:
5158 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 5159out:
5160 return err;
f24e9980
SW		 5161}
5162
5163void ceph_osdc_stop(struct ceph_osd_client *osdc)
5164{
88bc1922 5165 destroy_workqueue(osdc->completion_wq);
a40c4f10 5166 destroy_workqueue(osdc->notify_wq);
f24e9980 5167 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 5168 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f 5169
5aea3dcd 5170 down_write(&osdc->lock);
42a2c09f
ID		 5171 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5172 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5173 struct ceph_osd, o_node);
5aea3dcd 5174 close_osd(osd);
42a2c09f 5175 }
5aea3dcd 5176 up_write(&osdc->lock);
02113a0f 5177 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5aea3dcd
ID		 5178 osd_cleanup(&osdc->homeless_osd);
5179
5180 WARN_ON(!list_empty(&osdc->osd_lru));
922dab61 5181 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4609245e
ID		 5182 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5183 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5aea3dcd
ID		 5184 WARN_ON(atomic_read(&osdc->num_requests));
5185 WARN_ON(atomic_read(&osdc->num_homeless));
42a2c09f 5186
e5253a7b 5187 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 5188 mempool_destroy(osdc->req_mempool);
5189 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 5190 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 5191}
5192
5193/*
5194 * Read some contiguous pages. If we cross a stripe boundary, shorten
5195 * *plen. Return number of bytes read, or error.
5196 */
5197int ceph_osdc_readpages(struct ceph_osd_client *osdc,
5198 struct ceph_vino vino, struct ceph_file_layout *layout,
5199 u64 off, u64 *plen,
5200 u32 truncate_seq, u64 truncate_size,
b7495fc2 5201 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 5202{
5203 struct ceph_osd_request *req;
5204 int rc = 0;
5205
5206 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
5207 vino.snap, off, *plen);
715e4cd4 5208 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 5209 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 5210 NULL, truncate_seq, truncate_size,
153e5167 5211 false);
6816282d
SW		 5212 if (IS_ERR(req))
5213 return PTR_ERR(req);
f24e9980
SW		 5214
5215 /* it may be a short read due to an object boundary */
406e2c9f 5216 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 5217 pages, *plen, page_align, false, false);
f24e9980 5218
e0c59487 5219 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 5220 off, *plen, *plen, page_align);
f24e9980
SW		 5221
5222 rc = ceph_osdc_start_request(osdc, req, false);
5223 if (!rc)
5224 rc = ceph_osdc_wait_request(osdc, req);
5225
5226 ceph_osdc_put_request(req);
5227 dout("readpages result %d\n", rc);
5228 return rc;
5229}
3d14c5d2 5230EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 5231
5232/*
5233 * do a synchronous write on N pages
5234 */
5235int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
5236 struct ceph_file_layout *layout,
5237 struct ceph_snap_context *snapc,
5238 u64 off, u64 len,
5239 u32 truncate_seq, u64 truncate_size,
fac02ddf 5240 struct timespec64 *mtime,
24808826 5241 struct page **pages, int num_pages)
f24e9980
SW		 5242{
5243 struct ceph_osd_request *req;
5244 int rc = 0;
b7495fc2 5245 int page_align = off & ~PAGE_MASK;
f24e9980 5246
715e4cd4 5247 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
54ea0046 5248 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
acead002 5249 snapc, truncate_seq, truncate_size,
153e5167 5250 true);
6816282d
SW		 5251 if (IS_ERR(req))
5252 return PTR_ERR(req);
f24e9980
SW		 5253
5254 /* it may be a short write due to an object boundary */
406e2c9f 5255 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 5256 false, false);
5257 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 5258
bb873b53 5259 req->r_mtime = *mtime;
87f979d3 5260 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 5261 if (!rc)
5262 rc = ceph_osdc_wait_request(osdc, req);
5263
5264 ceph_osdc_put_request(req);
5265 if (rc == 0)
5266 rc = len;
5267 dout("writepages result %d\n", rc);
5268 return rc;
5269}
3d14c5d2 5270EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 5271
23ddf9be
LH		 5272static int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5273 u64 src_snapid, u64 src_version,
5274 struct ceph_object_id *src_oid,
5275 struct ceph_object_locator *src_oloc,
5276 u32 src_fadvise_flags,
5277 u32 dst_fadvise_flags,
5278 u8 copy_from_flags)
5279{
5280 struct ceph_osd_req_op *op;
5281 struct page **pages;
5282 void *p, *end;
5283
5284 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5285 if (IS_ERR(pages))
5286 return PTR_ERR(pages);
5287
5288 op = _osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM, dst_fadvise_flags);
5289 op->copy_from.snapid = src_snapid;
5290 op->copy_from.src_version = src_version;
5291 op->copy_from.flags = copy_from_flags;
5292 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5293
5294 p = page_address(pages[0]);
5295 end = p + PAGE_SIZE;
5296 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5297 encode_oloc(&p, end, src_oloc);
5298 op->indata_len = PAGE_SIZE - (end - p);
5299
5300 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5301 op->indata_len, 0, false, true);
5302 return 0;
5303}
5304
5305int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
5306 u64 src_snapid, u64 src_version,
5307 struct ceph_object_id *src_oid,
5308 struct ceph_object_locator *src_oloc,
5309 u32 src_fadvise_flags,
5310 struct ceph_object_id *dst_oid,
5311 struct ceph_object_locator *dst_oloc,
5312 u32 dst_fadvise_flags,
5313 u8 copy_from_flags)
5314{
5315 struct ceph_osd_request *req;
5316 int ret;
5317
5318 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL);
5319 if (!req)
5320 return -ENOMEM;
5321
5322 req->r_flags = CEPH_OSD_FLAG_WRITE;
5323
5324 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
5325 ceph_oid_copy(&req->r_t.base_oid, dst_oid);
5326
5327 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid,
5328 src_oloc, src_fadvise_flags,
5329 dst_fadvise_flags, copy_from_flags);
5330 if (ret)
5331 goto out;
5332
5333 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL);
5334 if (ret)
5335 goto out;
5336
5337 ceph_osdc_start_request(osdc, req, false);
5338 ret = ceph_osdc_wait_request(osdc, req);
5339
5340out:
5341 ceph_osdc_put_request(req);
5342 return ret;
5343}
5344EXPORT_SYMBOL(ceph_osdc_copy_from);
5345
57a35dfb 5346int __init ceph_osdc_setup(void)
5522ae0b 5347{
3f1af42a
ID		 5348 size_t size = sizeof(struct ceph_osd_request) +
5349 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5350
5522ae0b 5351 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 5352 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5353 0, 0, NULL);
5522ae0b
AE		 5354
5355 return ceph_osd_request_cache ? 0 : -ENOMEM;
5356}
5522ae0b
AE		 5357
5358void ceph_osdc_cleanup(void)
5359{
5360 BUG_ON(!ceph_osd_request_cache);
5361 kmem_cache_destroy(ceph_osd_request_cache);
5362 ceph_osd_request_cache = NULL;
5363}
5522ae0b 5364
f24e9980
SW		 5365/*
5366 * handle incoming message
5367 */
5368static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5369{
5370 struct ceph_osd *osd = con->private;
5aea3dcd 5371 struct ceph_osd_client *osdc = osd->o_osdc;
f24e9980
SW		 5372 int type = le16_to_cpu(msg->hdr.type);
5373
f24e9980
SW		 5374 switch (type) {
5375 case CEPH_MSG_OSD_MAP:
5376 ceph_osdc_handle_map(osdc, msg);
5377 break;
5378 case CEPH_MSG_OSD_OPREPLY:
5aea3dcd 5379 handle_reply(osd, msg);
f24e9980 5380 break;
a02a946d
ID		 5381 case CEPH_MSG_OSD_BACKOFF:
5382 handle_backoff(osd, msg);
5383 break;
a40c4f10
YS		 5384 case CEPH_MSG_WATCH_NOTIFY:
5385 handle_watch_notify(osdc, msg);
5386 break;
f24e9980
SW		 5387
5388 default:
5389 pr_err("received unknown message type %d %s\n", type,
5390 ceph_msg_type_name(type));
5391 }
5aea3dcd 5392
f24e9980
SW		 5393 ceph_msg_put(msg);
5394}
5395
5b3a4db3 5396/*
d15f9d69
ID		 5397 * Lookup and return message for incoming reply. Don't try to do
5398 * anything about a larger than preallocated data portion of the
5399 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 5400 */
5401static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 5402 struct ceph_msg_header *hdr,
5403 int *skip)
f24e9980
SW		 5404{
5405 struct ceph_osd *osd = con->private;
5406 struct ceph_osd_client *osdc = osd->o_osdc;
5aea3dcd 5407 struct ceph_msg *m = NULL;
0547a9b3 5408 struct ceph_osd_request *req;
3f0a4ac5 5409 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 5410 int data_len = le32_to_cpu(hdr->data_len);
5aea3dcd 5411 u64 tid = le64_to_cpu(hdr->tid);
f24e9980 5412
5aea3dcd
ID		 5413 down_read(&osdc->lock);
5414 if (!osd_registered(osd)) {
5415 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5416 *skip = 1;
5417 goto out_unlock_osdc;
5418 }
5419 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5420
5421 mutex_lock(&osd->lock);
5422 req = lookup_request(&osd->o_requests, tid);
0547a9b3 5423 if (!req) {
cd8140c6
ID		 5424 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5425 osd->o_osd, tid);
d15f9d69 5426 *skip = 1;
5aea3dcd 5427 goto out_unlock_session;
0547a9b3 5428 }
c16e7869 5429
ace6d3a9 5430 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 5431
f2be82b0 5432 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 5433 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5434 __func__, osd->o_osd, req->r_tid, front_len,
5435 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 5436 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5437 false);
a79832f2 5438 if (!m)
5aea3dcd 5439 goto out_unlock_session;
c16e7869
SW		 5440 ceph_msg_put(req->r_reply);
5441 req->r_reply = m;
5442 }
0fff87ec 5443
d15f9d69
ID		 5444 if (data_len > req->r_reply->data_length) {
5445 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5446 __func__, osd->o_osd, req->r_tid, data_len,
5447 req->r_reply->data_length);
5448 m = NULL;
5449 *skip = 1;
5aea3dcd 5450 goto out_unlock_session;
0547a9b3 5451 }
d15f9d69
ID		 5452
5453 m = ceph_msg_get(req->r_reply);
c16e7869 5454 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3 5455
5aea3dcd
ID		 5456out_unlock_session:
5457 mutex_unlock(&osd->lock);
5458out_unlock_osdc:
5459 up_read(&osdc->lock);
2450418c 5460 return m;
5b3a4db3
SW		 5461}
5462
19079203
ID		 5463/*
5464 * TODO: switch to a msg-owned pagelist
5465 */
5466static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5467{
5468 struct ceph_msg *m;
5469 int type = le16_to_cpu(hdr->type);
5470 u32 front_len = le32_to_cpu(hdr->front_len);
5471 u32 data_len = le32_to_cpu(hdr->data_len);
5472
0d9c1ab3 5473 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
19079203
ID		 5474 if (!m)
5475 return NULL;
5476
5477 if (data_len) {
5478 struct page **pages;
5479 struct ceph_osd_data osd_data;
5480
5481 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5482 GFP_NOIO);
c22e853a 5483 if (IS_ERR(pages)) {
19079203
ID		 5484 ceph_msg_put(m);
5485 return NULL;
5486 }
5487
5488 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
5489 false);
5490 ceph_osdc_msg_data_add(m, &osd_data);
5491 }
5492
5493 return m;
5494}
5495
5b3a4db3
SW		 5496static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5497 struct ceph_msg_header *hdr,
5498 int *skip)
5499{
5500 struct ceph_osd *osd = con->private;
5501 int type = le16_to_cpu(hdr->type);
5b3a4db3 5502
1c20f2d2 5503 *skip = 0;
5b3a4db3
SW		 5504 switch (type) {
5505 case CEPH_MSG_OSD_MAP:
a02a946d 5506 case CEPH_MSG_OSD_BACKOFF:
a40c4f10 5507 case CEPH_MSG_WATCH_NOTIFY:
19079203 5508 return alloc_msg_with_page_vector(hdr);
5b3a4db3
SW		 5509 case CEPH_MSG_OSD_OPREPLY:
5510 return get_reply(con, hdr, skip);
5511 default:
5aea3dcd
ID		 5512 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5513 osd->o_osd, type);
5b3a4db3
SW		 5514 *skip = 1;
5515 return NULL;
5516 }
f24e9980
SW		 5517}
5518
5519/*
5520 * Wrappers to refcount containing ceph_osd struct
5521 */
5522static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5523{
5524 struct ceph_osd *osd = con->private;
5525 if (get_osd(osd))
5526 return con;
5527 return NULL;
5528}
5529
5530static void put_osd_con(struct ceph_connection *con)
5531{
5532 struct ceph_osd *osd = con->private;
5533 put_osd(osd);
5534}
5535
4e7a5dcd
SW		 5536/*
5537 * authentication
5538 */
a3530df3
AE		 5539/*
5540 * Note: returned pointer is the address of a structure that's
5541 * managed separately. Caller must *not* attempt to free it.
5542 */
5543static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 5544 int *proto, int force_new)
4e7a5dcd
SW		 5545{
5546 struct ceph_osd *o = con->private;
5547 struct ceph_osd_client *osdc = o->o_osdc;
5548 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 5549 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 5550
74f1869f 5551 if (force_new && auth->authorizer) {
6c1ea260 5552 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 5553 auth->authorizer = NULL;
5554 }
27859f97
SW		 5555 if (!auth->authorizer) {
5556 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5557 auth);
4e7a5dcd 5558 if (ret)
a3530df3 5559 return ERR_PTR(ret);
27859f97
SW		 5560 } else {
5561 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 5562 auth);
5563 if (ret)
5564 return ERR_PTR(ret);
4e7a5dcd 5565 }
4e7a5dcd 5566 *proto = ac->protocol;
74f1869f 5567
a3530df3 5568 return auth;
4e7a5dcd
SW		 5569}
5570
6daca13d
ID		 5571static int add_authorizer_challenge(struct ceph_connection *con,
5572 void *challenge_buf, int challenge_buf_len)
5573{
5574 struct ceph_osd *o = con->private;
5575 struct ceph_osd_client *osdc = o->o_osdc;
5576 struct ceph_auth_client *ac = osdc->client->monc.auth;
5577
5578 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5579 challenge_buf, challenge_buf_len);
5580}
4e7a5dcd 5581
0dde5848 5582static int verify_authorizer_reply(struct ceph_connection *con)
4e7a5dcd
SW		 5583{
5584 struct ceph_osd *o = con->private;
5585 struct ceph_osd_client *osdc = o->o_osdc;
5586 struct ceph_auth_client *ac = osdc->client->monc.auth;
5587
0dde5848 5588 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
4e7a5dcd
SW		 5589}
5590
9bd2e6f8
SW		 5591static int invalidate_authorizer(struct ceph_connection *con)
5592{
5593 struct ceph_osd *o = con->private;
5594 struct ceph_osd_client *osdc = o->o_osdc;
5595 struct ceph_auth_client *ac = osdc->client->monc.auth;
5596
27859f97 5597 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 5598 return ceph_monc_validate_auth(&osdc->client->monc);
5599}
4e7a5dcd 5600
8cb441c0
ID		 5601static void osd_reencode_message(struct ceph_msg *msg)
5602{
914902af
ID		 5603 int type = le16_to_cpu(msg->hdr.type);
5604
5605 if (type == CEPH_MSG_OSD_OP)
5606 encode_request_finish(msg);
8cb441c0
ID		 5607}
5608
79dbd1ba 5609static int osd_sign_message(struct ceph_msg *msg)
33d07337 5610{
79dbd1ba 5611 struct ceph_osd *o = msg->con->private;
33d07337 5612 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5613
33d07337
YZ		 5614 return ceph_auth_sign_message(auth, msg);
5615}
5616
79dbd1ba 5617static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 5618{
79dbd1ba 5619 struct ceph_osd *o = msg->con->private;
33d07337 5620 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5621
33d07337
YZ		 5622 return ceph_auth_check_message_signature(auth, msg);
5623}
5624
9e32789f 5625static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 5626 .get = get_osd_con,
5627 .put = put_osd_con,
5628 .dispatch = dispatch,
4e7a5dcd 5629 .get_authorizer = get_authorizer,
6daca13d 5630 .add_authorizer_challenge = add_authorizer_challenge,
4e7a5dcd 5631 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 5632 .invalidate_authorizer = invalidate_authorizer,
f24e9980 5633 .alloc_msg = alloc_msg,
8cb441c0 5634 .reencode_message = osd_reencode_message,
79dbd1ba
ID		 5635 .sign_message = osd_sign_message,
5636 .check_message_signature = osd_check_message_signature,
5aea3dcd 5637 .fault = osd_fault,
f24e9980 5638};
Linux 6.x block layer and io_uring tree(s)