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Merge tag 'drm-misc-fixes-2019-09-05' of git://anongit.freedesktop.org/drm/drm-misc...
[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 1498 bool unpaused = false;
a5613724 1499 bool legacy_change = false;
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
a5613724 1587 if (unpaused || legacy_change || force_resend || split)
84ed45df
ID		 1588 ct_res = CALC_TARGET_NEED_RESEND;
1589 else
1590 ct_res = CALC_TARGET_NO_ACTION;
1591
63244fa1 1592out:
a5613724
ID		 1593 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1594 legacy_change, force_resend, split, ct_res, t->osd);
63244fa1
ID		 1595 return ct_res;
1596}
1597
a02a946d
ID		 1598static struct ceph_spg_mapping *alloc_spg_mapping(void)
1599{
1600 struct ceph_spg_mapping *spg;
1601
1602 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1603 if (!spg)
1604 return NULL;
1605
1606 RB_CLEAR_NODE(&spg->node);
1607 spg->backoffs = RB_ROOT;
1608 return spg;
1609}
1610
1611static void free_spg_mapping(struct ceph_spg_mapping *spg)
1612{
1613 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1614 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1615
1616 kfree(spg);
1617}
1618
1619/*
1620 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1621 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1622 * defined only within a specific spgid; it does not pass anything to
1623 * children on split, or to another primary.
1624 */
1625DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1626 RB_BYPTR, const struct ceph_spg *, node)
1627
1628static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1629{
1630 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1631}
1632
1633static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1634 void **pkey, size_t *pkey_len)
1635{
1636 if (hoid->key_len) {
1637 *pkey = hoid->key;
1638 *pkey_len = hoid->key_len;
1639 } else {
1640 *pkey = hoid->oid;
1641 *pkey_len = hoid->oid_len;
1642 }
1643}
1644
1645static int compare_names(const void *name1, size_t name1_len,
1646 const void *name2, size_t name2_len)
1647{
1648 int ret;
1649
1650 ret = memcmp(name1, name2, min(name1_len, name2_len));
1651 if (!ret) {
1652 if (name1_len < name2_len)
1653 ret = -1;
1654 else if (name1_len > name2_len)
1655 ret = 1;
1656 }
1657 return ret;
1658}
1659
1660static int hoid_compare(const struct ceph_hobject_id *lhs,
1661 const struct ceph_hobject_id *rhs)
1662{
1663 void *effective_key1, *effective_key2;
1664 size_t effective_key1_len, effective_key2_len;
1665 int ret;
1666
1667 if (lhs->is_max < rhs->is_max)
1668 return -1;
1669 if (lhs->is_max > rhs->is_max)
1670 return 1;
1671
1672 if (lhs->pool < rhs->pool)
1673 return -1;
1674 if (lhs->pool > rhs->pool)
1675 return 1;
1676
1677 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1678 return -1;
1679 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1680 return 1;
1681
1682 ret = compare_names(lhs->nspace, lhs->nspace_len,
1683 rhs->nspace, rhs->nspace_len);
1684 if (ret)
1685 return ret;
1686
1687 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1688 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1689 ret = compare_names(effective_key1, effective_key1_len,
1690 effective_key2, effective_key2_len);
1691 if (ret)
1692 return ret;
1693
1694 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1695 if (ret)
1696 return ret;
1697
1698 if (lhs->snapid < rhs->snapid)
1699 return -1;
1700 if (lhs->snapid > rhs->snapid)
1701 return 1;
1702
1703 return 0;
1704}
1705
1706/*
1707 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1708 * compat stuff here.
1709 *
1710 * Assumes @hoid is zero-initialized.
1711 */
1712static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1713{
1714 u8 struct_v;
1715 u32 struct_len;
1716 int ret;
1717
1718 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1719 &struct_len);
1720 if (ret)
1721 return ret;
1722
1723 if (struct_v < 4) {
1724 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1725 goto e_inval;
1726 }
1727
1728 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1729 GFP_NOIO);
1730 if (IS_ERR(hoid->key)) {
1731 ret = PTR_ERR(hoid->key);
1732 hoid->key = NULL;
1733 return ret;
1734 }
1735
1736 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1737 GFP_NOIO);
1738 if (IS_ERR(hoid->oid)) {
1739 ret = PTR_ERR(hoid->oid);
1740 hoid->oid = NULL;
1741 return ret;
1742 }
1743
1744 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1745 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1746 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1747
1748 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1749 GFP_NOIO);
1750 if (IS_ERR(hoid->nspace)) {
1751 ret = PTR_ERR(hoid->nspace);
1752 hoid->nspace = NULL;
1753 return ret;
1754 }
1755
1756 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1757
1758 ceph_hoid_build_hash_cache(hoid);
1759 return 0;
1760
1761e_inval:
1762 return -EINVAL;
1763}
1764
1765static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1766{
1767 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1768 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1769}
1770
1771static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1772{
1773 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1774 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1775 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1776 ceph_encode_64(p, hoid->snapid);
1777 ceph_encode_32(p, hoid->hash);
1778 ceph_encode_8(p, hoid->is_max);
1779 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1780 ceph_encode_64(p, hoid->pool);
1781}
1782
1783static void free_hoid(struct ceph_hobject_id *hoid)
1784{
1785 if (hoid) {
1786 kfree(hoid->key);
1787 kfree(hoid->oid);
1788 kfree(hoid->nspace);
1789 kfree(hoid);
1790 }
1791}
1792
1793static struct ceph_osd_backoff *alloc_backoff(void)
1794{
1795 struct ceph_osd_backoff *backoff;
1796
1797 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1798 if (!backoff)
1799 return NULL;
1800
1801 RB_CLEAR_NODE(&backoff->spg_node);
1802 RB_CLEAR_NODE(&backoff->id_node);
1803 return backoff;
1804}
1805
1806static void free_backoff(struct ceph_osd_backoff *backoff)
1807{
1808 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1809 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1810
1811 free_hoid(backoff->begin);
1812 free_hoid(backoff->end);
1813 kfree(backoff);
1814}
1815
1816/*
1817 * Within a specific spgid, backoffs are managed by ->begin hoid.
1818 */
1819DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1820 RB_BYVAL, spg_node);
1821
1822static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1823 const struct ceph_hobject_id *hoid)
1824{
1825 struct rb_node *n = root->rb_node;
1826
1827 while (n) {
1828 struct ceph_osd_backoff *cur =
1829 rb_entry(n, struct ceph_osd_backoff, spg_node);
1830 int cmp;
1831
1832 cmp = hoid_compare(hoid, cur->begin);
1833 if (cmp < 0) {
1834 n = n->rb_left;
1835 } else if (cmp > 0) {
1836 if (hoid_compare(hoid, cur->end) < 0)
1837 return cur;
1838
1839 n = n->rb_right;
1840 } else {
1841 return cur;
1842 }
1843 }
1844
1845 return NULL;
1846}
1847
1848/*
1849 * Each backoff has a unique id within its OSD session.
1850 */
1851DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1852
1853static void clear_backoffs(struct ceph_osd *osd)
1854{
1855 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1856 struct ceph_spg_mapping *spg =
1857 rb_entry(rb_first(&osd->o_backoff_mappings),
1858 struct ceph_spg_mapping, node);
1859
1860 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1861 struct ceph_osd_backoff *backoff =
1862 rb_entry(rb_first(&spg->backoffs),
1863 struct ceph_osd_backoff, spg_node);
1864
1865 erase_backoff(&spg->backoffs, backoff);
1866 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1867 free_backoff(backoff);
1868 }
1869 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1870 free_spg_mapping(spg);
1871 }
1872}
1873
1874/*
1875 * Set up a temporary, non-owning view into @t.
1876 */
1877static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1878 const struct ceph_osd_request_target *t)
1879{
1880 hoid->key = NULL;
1881 hoid->key_len = 0;
1882 hoid->oid = t->target_oid.name;
1883 hoid->oid_len = t->target_oid.name_len;
1884 hoid->snapid = CEPH_NOSNAP;
1885 hoid->hash = t->pgid.seed;
1886 hoid->is_max = false;
1887 if (t->target_oloc.pool_ns) {
1888 hoid->nspace = t->target_oloc.pool_ns->str;
1889 hoid->nspace_len = t->target_oloc.pool_ns->len;
1890 } else {
1891 hoid->nspace = NULL;
1892 hoid->nspace_len = 0;
1893 }
1894 hoid->pool = t->target_oloc.pool;
1895 ceph_hoid_build_hash_cache(hoid);
1896}
1897
1898static bool should_plug_request(struct ceph_osd_request *req)
1899{
1900 struct ceph_osd *osd = req->r_osd;
1901 struct ceph_spg_mapping *spg;
1902 struct ceph_osd_backoff *backoff;
1903 struct ceph_hobject_id hoid;
1904
1905 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1906 if (!spg)
1907 return false;
1908
1909 hoid_fill_from_target(&hoid, &req->r_t);
1910 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1911 if (!backoff)
1912 return false;
1913
1914 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1915 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1916 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1917 return true;
1918}
1919
0d9c1ab3
ID		 1920/*
1921 * Keep get_num_data_items() in sync with this function.
1922 */
98c4bfe9 1923static void setup_request_data(struct ceph_osd_request *req)
f24e9980 1924{
98c4bfe9
ID		 1925 struct ceph_msg *request_msg = req->r_request;
1926 struct ceph_msg *reply_msg = req->r_reply;
1927 struct ceph_osd_req_op *op;
bb873b53 1928
98c4bfe9 1929 if (req->r_request->num_data_items || req->r_reply->num_data_items)
bb873b53 1930 return;
f24e9980 1931
98c4bfe9
ID		 1932 WARN_ON(request_msg->data_length || reply_msg->data_length);
1933 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
bb873b53
ID		 1934 switch (op->op) {
1935 /* request */
1936 case CEPH_OSD_OP_WRITE:
1937 case CEPH_OSD_OP_WRITEFULL:
1938 WARN_ON(op->indata_len != op->extent.length);
98c4bfe9
ID		 1939 ceph_osdc_msg_data_add(request_msg,
1940 &op->extent.osd_data);
bb873b53
ID		 1941 break;
1942 case CEPH_OSD_OP_SETXATTR:
1943 case CEPH_OSD_OP_CMPXATTR:
1944 WARN_ON(op->indata_len != op->xattr.name_len +
1945 op->xattr.value_len);
98c4bfe9
ID		 1946 ceph_osdc_msg_data_add(request_msg,
1947 &op->xattr.osd_data);
bb873b53 1948 break;
922dab61 1949 case CEPH_OSD_OP_NOTIFY_ACK:
98c4bfe9 1950 ceph_osdc_msg_data_add(request_msg,
922dab61
ID		 1951 &op->notify_ack.request_data);
1952 break;
23ddf9be
LH		 1953 case CEPH_OSD_OP_COPY_FROM:
1954 ceph_osdc_msg_data_add(request_msg,
1955 &op->copy_from.osd_data);
1956 break;
bb873b53
ID		 1957
1958 /* reply */
1959 case CEPH_OSD_OP_STAT:
98c4bfe9 1960 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 1961 &op->raw_data_in);
1962 break;
1963 case CEPH_OSD_OP_READ:
98c4bfe9 1964 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 1965 &op->extent.osd_data);
1966 break;
a4ed38d7 1967 case CEPH_OSD_OP_LIST_WATCHERS:
98c4bfe9 1968 ceph_osdc_msg_data_add(reply_msg,
a4ed38d7
DF		 1969 &op->list_watchers.response_data);
1970 break;
bb873b53
ID		 1971
1972 /* both */
1973 case CEPH_OSD_OP_CALL:
1974 WARN_ON(op->indata_len != op->cls.class_len +
1975 op->cls.method_len +
1976 op->cls.indata_len);
98c4bfe9
ID		 1977 ceph_osdc_msg_data_add(request_msg,
1978 &op->cls.request_info);
bb873b53 1979 /* optional, can be NONE */
98c4bfe9
ID		 1980 ceph_osdc_msg_data_add(request_msg,
1981 &op->cls.request_data);
bb873b53 1982 /* optional, can be NONE */
98c4bfe9 1983 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 1984 &op->cls.response_data);
1985 break;
19079203 1986 case CEPH_OSD_OP_NOTIFY:
98c4bfe9 1987 ceph_osdc_msg_data_add(request_msg,
19079203 1988 &op->notify.request_data);
98c4bfe9 1989 ceph_osdc_msg_data_add(reply_msg,
19079203
ID		 1990 &op->notify.response_data);
1991 break;
bb873b53 1992 }
bb873b53 1993 }
bb873b53
ID		 1994}
1995
2e59ffd1
ID		 1996static void encode_pgid(void **p, const struct ceph_pg *pgid)
1997{
1998 ceph_encode_8(p, 1);
1999 ceph_encode_64(p, pgid->pool);
2000 ceph_encode_32(p, pgid->seed);
2001 ceph_encode_32(p, -1); /* preferred */
2002}
2003
8cb441c0
ID		 2004static void encode_spgid(void **p, const struct ceph_spg *spgid)
2005{
2006 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2007 encode_pgid(p, &spgid->pgid);
2008 ceph_encode_8(p, spgid->shard);
2009}
2010
2e59ffd1
ID		 2011static void encode_oloc(void **p, void *end,
2012 const struct ceph_object_locator *oloc)
2013{
2014 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2015 ceph_encode_64(p, oloc->pool);
2016 ceph_encode_32(p, -1); /* preferred */
2017 ceph_encode_32(p, 0); /* key len */
2018 if (oloc->pool_ns)
2019 ceph_encode_string(p, end, oloc->pool_ns->str,
2020 oloc->pool_ns->len);
2021 else
2022 ceph_encode_32(p, 0);
2023}
2024
8cb441c0
ID		 2025static void encode_request_partial(struct ceph_osd_request *req,
2026 struct ceph_msg *msg)
bb873b53
ID		 2027{
2028 void *p = msg->front.iov_base;
2029 void *const end = p + msg->front_alloc_len;
2030 u32 data_len = 0;
2031 int i;
2032
2033 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2034 /* snapshots aren't writeable */
2035 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2036 } else {
2037 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2038 req->r_data_offset || req->r_snapc);
2039 }
2040
98c4bfe9 2041 setup_request_data(req);
bb873b53 2042
8cb441c0
ID		 2043 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2044 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
bb873b53
ID		 2045 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2046 ceph_encode_32(&p, req->r_flags);
8cb441c0
ID		 2047
2048 /* reqid */
2049 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2050 memset(p, 0, sizeof(struct ceph_osd_reqid));
2051 p += sizeof(struct ceph_osd_reqid);
2052
2053 /* trace */
2054 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2055 p += sizeof(struct ceph_blkin_trace_info);
2056
2057 ceph_encode_32(&p, 0); /* client_inc, always 0 */
fac02ddf 2058 ceph_encode_timespec64(p, &req->r_mtime);
bb873b53 2059 p += sizeof(struct ceph_timespec);
aa26d662 2060
2e59ffd1 2061 encode_oloc(&p, end, &req->r_t.target_oloc);
2e59ffd1
ID		 2062 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2063 req->r_t.target_oid.name_len);
f24e9980 2064
bb873b53
ID		 2065 /* ops, can imply data */
2066 ceph_encode_16(&p, req->r_num_ops);
2067 for (i = 0; i < req->r_num_ops; i++) {
2068 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2069 p += sizeof(struct ceph_osd_op);
2070 }
26be8808 2071
bb873b53
ID		 2072 ceph_encode_64(&p, req->r_snapid); /* snapid */
2073 if (req->r_snapc) {
2074 ceph_encode_64(&p, req->r_snapc->seq);
2075 ceph_encode_32(&p, req->r_snapc->num_snaps);
2076 for (i = 0; i < req->r_snapc->num_snaps; i++)
2077 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2078 } else {
2079 ceph_encode_64(&p, 0); /* snap_seq */
2080 ceph_encode_32(&p, 0); /* snaps len */
2081 }
2082
2083 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
986e8989 2084 BUG_ON(p > end - 8); /* space for features */
bb873b53 2085
8cb441c0
ID		 2086 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2087 /* front_len is finalized in encode_request_finish() */
986e8989
ID		 2088 msg->front.iov_len = p - msg->front.iov_base;
2089 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
bb873b53
ID		 2090 msg->hdr.data_len = cpu_to_le32(data_len);
2091 /*
2092 * The header "data_off" is a hint to the receiver allowing it
2093 * to align received data into its buffers such that there's no
2094 * need to re-copy it before writing it to disk (direct I/O).
2095 */
2096 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
26be8808 2097
8cb441c0
ID		 2098 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2099 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2100}
2101
2102static void encode_request_finish(struct ceph_msg *msg)
2103{
2104 void *p = msg->front.iov_base;
986e8989 2105 void *const partial_end = p + msg->front.iov_len;
8cb441c0
ID		 2106 void *const end = p + msg->front_alloc_len;
2107
2108 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2109 /* luminous OSD -- encode features and be done */
986e8989 2110 p = partial_end;
8cb441c0
ID		 2111 ceph_encode_64(&p, msg->con->peer_features);
2112 } else {
2113 struct {
2114 char spgid[CEPH_ENCODING_START_BLK_LEN +
2115 CEPH_PGID_ENCODING_LEN + 1];
2116 __le32 hash;
2117 __le32 epoch;
2118 __le32 flags;
2119 char reqid[CEPH_ENCODING_START_BLK_LEN +
2120 sizeof(struct ceph_osd_reqid)];
2121 char trace[sizeof(struct ceph_blkin_trace_info)];
2122 __le32 client_inc;
2123 struct ceph_timespec mtime;
2124 } __packed head;
2125 struct ceph_pg pgid;
2126 void *oloc, *oid, *tail;
2127 int oloc_len, oid_len, tail_len;
2128 int len;
2129
2130 /*
2131 * Pre-luminous OSD -- reencode v8 into v4 using @head
2132 * as a temporary buffer. Encode the raw PG; the rest
2133 * is just a matter of moving oloc, oid and tail blobs
2134 * around.
2135 */
2136 memcpy(&head, p, sizeof(head));
2137 p += sizeof(head);
2138
2139 oloc = p;
2140 p += CEPH_ENCODING_START_BLK_LEN;
2141 pgid.pool = ceph_decode_64(&p);
2142 p += 4 + 4; /* preferred, key len */
2143 len = ceph_decode_32(&p);
2144 p += len; /* nspace */
2145 oloc_len = p - oloc;
2146
2147 oid = p;
2148 len = ceph_decode_32(&p);
2149 p += len;
2150 oid_len = p - oid;
2151
2152 tail = p;
986e8989 2153 tail_len = partial_end - p;
8cb441c0
ID		 2154
2155 p = msg->front.iov_base;
2156 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2157 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2158 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2159 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2160
2161 /* reassert_version */
2162 memset(p, 0, sizeof(struct ceph_eversion));
2163 p += sizeof(struct ceph_eversion);
2164
2165 BUG_ON(p >= oloc);
2166 memmove(p, oloc, oloc_len);
2167 p += oloc_len;
2168
2169 pgid.seed = le32_to_cpu(head.hash);
2170 encode_pgid(&p, &pgid); /* raw pg */
2171
2172 BUG_ON(p >= oid);
2173 memmove(p, oid, oid_len);
2174 p += oid_len;
2175
2176 /* tail -- ops, snapid, snapc, retry_attempt */
2177 BUG_ON(p >= tail);
2178 memmove(p, tail, tail_len);
2179 p += tail_len;
2180
2181 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2182 }
2183
2184 BUG_ON(p > end);
2185 msg->front.iov_len = p - msg->front.iov_base;
2186 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2187
2188 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2189 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2190 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2191 le16_to_cpu(msg->hdr.version));
bb873b53
ID		 2192}
2193
2194/*
2195 * @req has to be assigned a tid and registered.
2196 */
2197static void send_request(struct ceph_osd_request *req)
2198{
2199 struct ceph_osd *osd = req->r_osd;
2200
5aea3dcd 2201 verify_osd_locked(osd);
bb873b53
ID		 2202 WARN_ON(osd->o_osd != req->r_t.osd);
2203
a02a946d
ID		 2204 /* backoff? */
2205 if (should_plug_request(req))
2206 return;
2207
5aea3dcd
ID		 2208 /*
2209 * We may have a previously queued request message hanging
2210 * around. Cancel it to avoid corrupting the msgr.
2211 */
2212 if (req->r_sent)
2213 ceph_msg_revoke(req->r_request);
2214
bb873b53
ID		 2215 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2216 if (req->r_attempts)
2217 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2218 else
2219 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2220
8cb441c0 2221 encode_request_partial(req, req->r_request);
bb873b53 2222
04c7d789 2223 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 2224 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
dc98ff72 2225 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
04c7d789
ID		 2226 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2227 req->r_attempts);
bb873b53
ID		 2228
2229 req->r_t.paused = false;
2230 req->r_stamp = jiffies;
2231 req->r_attempts++;
2232
2233 req->r_sent = osd->o_incarnation;
2234 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2235 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
f24e9980
SW		 2236}
2237
42c1b124
ID		 2238static void maybe_request_map(struct ceph_osd_client *osdc)
2239{
2240 bool continuous = false;
2241
5aea3dcd 2242 verify_osdc_locked(osdc);
42c1b124
ID		 2243 WARN_ON(!osdc->osdmap->epoch);
2244
b7ec35b3
ID		 2245 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2246 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2247 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
42c1b124
ID		 2248 dout("%s osdc %p continuous\n", __func__, osdc);
2249 continuous = true;
2250 } else {
2251 dout("%s osdc %p onetime\n", __func__, osdc);
2252 }
2253
2254 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2255 osdc->osdmap->epoch + 1, continuous))
2256 ceph_monc_renew_subs(&osdc->client->monc);
2257}
2258
a1f4020a 2259static void complete_request(struct ceph_osd_request *req, int err);
4609245e
ID		 2260static void send_map_check(struct ceph_osd_request *req);
2261
5aea3dcd 2262static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
0bbfdfe8 2263{
5aea3dcd
ID		 2264 struct ceph_osd_client *osdc = req->r_osdc;
2265 struct ceph_osd *osd;
4609245e 2266 enum calc_target_result ct_res;
66850df5 2267 int err = 0;
5aea3dcd
ID		 2268 bool need_send = false;
2269 bool promoted = false;
0bbfdfe8 2270
b18b9550 2271 WARN_ON(req->r_tid);
5aea3dcd
ID		 2272 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2273
2274again:
7de030d6 2275 ct_res = calc_target(osdc, &req->r_t, NULL, false);
4609245e
ID		 2276 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2277 goto promote;
2278
5aea3dcd
ID		 2279 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2280 if (IS_ERR(osd)) {
2281 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2282 goto promote;
0bbfdfe8
ID		 2283 }
2284
66850df5
ID		 2285 if (osdc->abort_err) {
2286 dout("req %p abort_err %d\n", req, osdc->abort_err);
2287 err = osdc->abort_err;
2288 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
58eb7932
JL		 2289 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2290 osdc->epoch_barrier);
2291 req->r_t.paused = true;
2292 maybe_request_map(osdc);
2293 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2294 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
5aea3dcd
ID		 2295 dout("req %p pausewr\n", req);
2296 req->r_t.paused = true;
2297 maybe_request_map(osdc);
2298 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
b7ec35b3 2299 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
5aea3dcd
ID		 2300 dout("req %p pauserd\n", req);
2301 req->r_t.paused = true;
2302 maybe_request_map(osdc);
2303 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2304 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2305 CEPH_OSD_FLAG_FULL_FORCE)) &&
b7ec35b3 2306 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
5aea3dcd
ID		 2307 pool_full(osdc, req->r_t.base_oloc.pool))) {
2308 dout("req %p full/pool_full\n", req);
02b2f549 2309 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
66850df5 2310 err = -ENOSPC;
29e87820
ID		 2311 } else {
2312 pr_warn_ratelimited("FULL or reached pool quota\n");
2313 req->r_t.paused = true;
2314 maybe_request_map(osdc);
2315 }
5aea3dcd
ID		 2316 } else if (!osd_homeless(osd)) {
2317 need_send = true;
0bbfdfe8 2318 } else {
5aea3dcd 2319 maybe_request_map(osdc);
0bbfdfe8
ID		 2320 }
2321
5aea3dcd
ID		 2322 mutex_lock(&osd->lock);
2323 /*
2324 * Assign the tid atomically with send_request() to protect
2325 * multiple writes to the same object from racing with each
2326 * other, resulting in out of order ops on the OSDs.
2327 */
2328 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2329 link_request(osd, req);
2330 if (need_send)
2331 send_request(req);
66850df5
ID		 2332 else if (err)
2333 complete_request(req, err);
5aea3dcd
ID		 2334 mutex_unlock(&osd->lock);
2335
6001567c 2336 if (!err && ct_res == CALC_TARGET_POOL_DNE)
4609245e
ID		 2337 send_map_check(req);
2338
5aea3dcd
ID		 2339 if (promoted)
2340 downgrade_write(&osdc->lock);
2341 return;
2342
2343promote:
2344 up_read(&osdc->lock);
2345 down_write(&osdc->lock);
2346 wrlocked = true;
2347 promoted = true;
2348 goto again;
2349}
2350
2351static void account_request(struct ceph_osd_request *req)
2352{
54ea0046 2353 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
b18b9550 2354 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
5aea3dcd 2355
b18b9550 2356 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
5aea3dcd 2357 atomic_inc(&req->r_osdc->num_requests);
7cc5e38f
ID		 2358
2359 req->r_start_stamp = jiffies;
5aea3dcd
ID		 2360}
2361
2362static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2363{
2364 ceph_osdc_get_request(req);
2365 account_request(req);
2366 __submit_request(req, wrlocked);
2367}
2368
45ee2c1d 2369static void finish_request(struct ceph_osd_request *req)
5aea3dcd
ID		 2370{
2371 struct ceph_osd_client *osdc = req->r_osdc;
5aea3dcd 2372
04c7d789 2373 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
5aea3dcd
ID		 2374 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2375
04c7d789
ID		 2376 if (req->r_osd)
2377 unlink_request(req->r_osd, req);
5aea3dcd
ID		 2378 atomic_dec(&osdc->num_requests);
2379
2380 /*
2381 * If an OSD has failed or returned and a request has been sent
2382 * twice, it's possible to get a reply and end up here while the
2383 * request message is queued for delivery. We will ignore the
2384 * reply, so not a big deal, but better to try and catch it.
2385 */
2386 ceph_msg_revoke(req->r_request);
2387 ceph_msg_revoke_incoming(req->r_reply);
2388}
2389
fe5da05e
ID		 2390static void __complete_request(struct ceph_osd_request *req)
2391{
d75f773c 2392 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
26df726b
ID		 2393 req->r_tid, req->r_callback, req->r_result);
2394
2395 if (req->r_callback)
fe5da05e 2396 req->r_callback(req);
26df726b
ID		 2397 complete_all(&req->r_completion);
2398 ceph_osdc_put_request(req);
fe5da05e
ID		 2399}
2400
88bc1922
ID		 2401static void complete_request_workfn(struct work_struct *work)
2402{
2403 struct ceph_osd_request *req =
2404 container_of(work, struct ceph_osd_request, r_complete_work);
2405
2406 __complete_request(req);
fe5da05e
ID		 2407}
2408
4609245e 2409/*
b18b9550 2410 * This is open-coded in handle_reply().
4609245e
ID		 2411 */
2412static void complete_request(struct ceph_osd_request *req, int err)
2413{
2414 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2415
2416 req->r_result = err;
45ee2c1d 2417 finish_request(req);
88bc1922
ID		 2418
2419 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2420 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
4609245e
ID		 2421}
2422
2423static void cancel_map_check(struct ceph_osd_request *req)
2424{
2425 struct ceph_osd_client *osdc = req->r_osdc;
2426 struct ceph_osd_request *lookup_req;
2427
2428 verify_osdc_wrlocked(osdc);
2429
2430 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2431 if (!lookup_req)
2432 return;
2433
2434 WARN_ON(lookup_req != req);
2435 erase_request_mc(&osdc->map_checks, req);
2436 ceph_osdc_put_request(req);
2437}
2438
5aea3dcd
ID		 2439static void cancel_request(struct ceph_osd_request *req)
2440{
2441 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2442
4609245e 2443 cancel_map_check(req);
45ee2c1d 2444 finish_request(req);
b18b9550 2445 complete_all(&req->r_completion);
c297eb42 2446 ceph_osdc_put_request(req);
5aea3dcd
ID		 2447}
2448
7cc5e38f
ID		 2449static void abort_request(struct ceph_osd_request *req, int err)
2450{
2451 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2452
2453 cancel_map_check(req);
2454 complete_request(req, err);
2455}
2456
66850df5
ID		 2457static int abort_fn(struct ceph_osd_request *req, void *arg)
2458{
2459 int err = *(int *)arg;
2460
2461 abort_request(req, err);
2462 return 0; /* continue iteration */
2463}
2464
2465/*
2466 * Abort all in-flight requests with @err and arrange for all future
2467 * requests to be failed immediately.
2468 */
2469void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2470{
2471 dout("%s osdc %p err %d\n", __func__, osdc, err);
2472 down_write(&osdc->lock);
2473 for_each_request(osdc, abort_fn, &err);
2474 osdc->abort_err = err;
2475 up_write(&osdc->lock);
2476}
2477EXPORT_SYMBOL(ceph_osdc_abort_requests);
2478
58eb7932
JL		 2479static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2480{
2481 if (likely(eb > osdc->epoch_barrier)) {
2482 dout("updating epoch_barrier from %u to %u\n",
2483 osdc->epoch_barrier, eb);
2484 osdc->epoch_barrier = eb;
2485 /* Request map if we're not to the barrier yet */
2486 if (eb > osdc->osdmap->epoch)
2487 maybe_request_map(osdc);
2488 }
2489}
2490
2491void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2492{
2493 down_read(&osdc->lock);
2494 if (unlikely(eb > osdc->epoch_barrier)) {
2495 up_read(&osdc->lock);
2496 down_write(&osdc->lock);
2497 update_epoch_barrier(osdc, eb);
2498 up_write(&osdc->lock);
2499 } else {
2500 up_read(&osdc->lock);
2501 }
2502}
2503EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2504
4eea0fef
ID		 2505/*
2506 * We can end up releasing caps as a result of abort_request().
2507 * In that case, we probably want to ensure that the cap release message
2508 * has an updated epoch barrier in it, so set the epoch barrier prior to
2509 * aborting the first request.
2510 */
2511static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2512{
2513 struct ceph_osd_client *osdc = req->r_osdc;
2514 bool *victims = arg;
2515
c843d13c 2516 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
4eea0fef 2517 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
690f951d 2518 pool_full(osdc, req->r_t.base_oloc.pool))) {
4eea0fef
ID		 2519 if (!*victims) {
2520 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2521 *victims = true;
2522 }
2523 abort_request(req, -ENOSPC);
2524 }
2525
2526 return 0; /* continue iteration */
2527}
2528
fc36d0a4
JL		 2529/*
2530 * Drop all pending requests that are stalled waiting on a full condition to
58eb7932
JL		 2531 * clear, and complete them with ENOSPC as the return code. Set the
2532 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2533 * cancelled.
fc36d0a4
JL		 2534 */
2535static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2536{
58eb7932 2537 bool victims = false;
fc36d0a4 2538
02b2f549 2539 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
c843d13c 2540 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
4eea0fef 2541 for_each_request(osdc, abort_on_full_fn, &victims);
fc36d0a4
JL		 2542}
2543
4609245e
ID		 2544static void check_pool_dne(struct ceph_osd_request *req)
2545{
2546 struct ceph_osd_client *osdc = req->r_osdc;
2547 struct ceph_osdmap *map = osdc->osdmap;
2548
2549 verify_osdc_wrlocked(osdc);
2550 WARN_ON(!map->epoch);
2551
2552 if (req->r_attempts) {
2553 /*
2554 * We sent a request earlier, which means that
2555 * previously the pool existed, and now it does not
2556 * (i.e., it was deleted).
2557 */
2558 req->r_map_dne_bound = map->epoch;
2559 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2560 req->r_tid);
2561 } else {
2562 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2563 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2564 }
2565
2566 if (req->r_map_dne_bound) {
2567 if (map->epoch >= req->r_map_dne_bound) {
2568 /* we had a new enough map */
2569 pr_info_ratelimited("tid %llu pool does not exist\n",
2570 req->r_tid);
2571 complete_request(req, -ENOENT);
2572 }
2573 } else {
2574 send_map_check(req);
2575 }
2576}
2577
2578static void map_check_cb(struct ceph_mon_generic_request *greq)
2579{
2580 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2581 struct ceph_osd_request *req;
2582 u64 tid = greq->private_data;
2583
2584 WARN_ON(greq->result || !greq->u.newest);
2585
2586 down_write(&osdc->lock);
2587 req = lookup_request_mc(&osdc->map_checks, tid);
2588 if (!req) {
2589 dout("%s tid %llu dne\n", __func__, tid);
2590 goto out_unlock;
2591 }
2592
2593 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2594 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2595 if (!req->r_map_dne_bound)
2596 req->r_map_dne_bound = greq->u.newest;
2597 erase_request_mc(&osdc->map_checks, req);
2598 check_pool_dne(req);
2599
2600 ceph_osdc_put_request(req);
2601out_unlock:
2602 up_write(&osdc->lock);
2603}
2604
2605static void send_map_check(struct ceph_osd_request *req)
2606{
2607 struct ceph_osd_client *osdc = req->r_osdc;
2608 struct ceph_osd_request *lookup_req;
2609 int ret;
2610
2611 verify_osdc_wrlocked(osdc);
2612
2613 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2614 if (lookup_req) {
2615 WARN_ON(lookup_req != req);
2616 return;
2617 }
2618
2619 ceph_osdc_get_request(req);
2620 insert_request_mc(&osdc->map_checks, req);
2621 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2622 map_check_cb, req->r_tid);
2623 WARN_ON(ret);
2624}
2625
922dab61
ID		 2626/*
2627 * lingering requests, watch/notify v2 infrastructure
2628 */
2629static void linger_release(struct kref *kref)
2630{
2631 struct ceph_osd_linger_request *lreq =
2632 container_of(kref, struct ceph_osd_linger_request, kref);
2633
2634 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2635 lreq->reg_req, lreq->ping_req);
2636 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2637 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
4609245e 2638 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
922dab61 2639 WARN_ON(!list_empty(&lreq->scan_item));
b07d3c4b 2640 WARN_ON(!list_empty(&lreq->pending_lworks));
922dab61
ID		 2641 WARN_ON(lreq->osd);
2642
2643 if (lreq->reg_req)
2644 ceph_osdc_put_request(lreq->reg_req);
2645 if (lreq->ping_req)
2646 ceph_osdc_put_request(lreq->ping_req);
2647 target_destroy(&lreq->t);
2648 kfree(lreq);
2649}
2650
2651static void linger_put(struct ceph_osd_linger_request *lreq)
2652{
2653 if (lreq)
2654 kref_put(&lreq->kref, linger_release);
2655}
2656
2657static struct ceph_osd_linger_request *
2658linger_get(struct ceph_osd_linger_request *lreq)
2659{
2660 kref_get(&lreq->kref);
2661 return lreq;
2662}
2663
2664static struct ceph_osd_linger_request *
2665linger_alloc(struct ceph_osd_client *osdc)
2666{
2667 struct ceph_osd_linger_request *lreq;
2668
2669 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2670 if (!lreq)
2671 return NULL;
2672
2673 kref_init(&lreq->kref);
2674 mutex_init(&lreq->lock);
2675 RB_CLEAR_NODE(&lreq->node);
2676 RB_CLEAR_NODE(&lreq->osdc_node);
4609245e 2677 RB_CLEAR_NODE(&lreq->mc_node);
922dab61 2678 INIT_LIST_HEAD(&lreq->scan_item);
b07d3c4b 2679 INIT_LIST_HEAD(&lreq->pending_lworks);
922dab61 2680 init_completion(&lreq->reg_commit_wait);
19079203 2681 init_completion(&lreq->notify_finish_wait);
922dab61
ID		 2682
2683 lreq->osdc = osdc;
2684 target_init(&lreq->t);
2685
2686 dout("%s lreq %p\n", __func__, lreq);
2687 return lreq;
2688}
2689
2690DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2691DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
4609245e 2692DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
922dab61
ID		 2693
2694/*
2695 * Create linger request <-> OSD session relation.
2696 *
2697 * @lreq has to be registered, @osd may be homeless.
2698 */
2699static void link_linger(struct ceph_osd *osd,
2700 struct ceph_osd_linger_request *lreq)
2701{
2702 verify_osd_locked(osd);
2703 WARN_ON(!lreq->linger_id || lreq->osd);
2704 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2705 osd->o_osd, lreq, lreq->linger_id);
2706
2707 if (!osd_homeless(osd))
2708 __remove_osd_from_lru(osd);
2709 else
2710 atomic_inc(&osd->o_osdc->num_homeless);
2711
2712 get_osd(osd);
2713 insert_linger(&osd->o_linger_requests, lreq);
2714 lreq->osd = osd;
2715}
2716
2717static void unlink_linger(struct ceph_osd *osd,
2718 struct ceph_osd_linger_request *lreq)
2719{
2720 verify_osd_locked(osd);
2721 WARN_ON(lreq->osd != osd);
2722 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2723 osd->o_osd, lreq, lreq->linger_id);
2724
2725 lreq->osd = NULL;
2726 erase_linger(&osd->o_linger_requests, lreq);
2727 put_osd(osd);
2728
2729 if (!osd_homeless(osd))
2730 maybe_move_osd_to_lru(osd);
2731 else
2732 atomic_dec(&osd->o_osdc->num_homeless);
2733}
2734
2735static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2736{
2737 verify_osdc_locked(lreq->osdc);
2738
2739 return !RB_EMPTY_NODE(&lreq->osdc_node);
2740}
2741
2742static bool linger_registered(struct ceph_osd_linger_request *lreq)
2743{
2744 struct ceph_osd_client *osdc = lreq->osdc;
2745 bool registered;
2746
2747 down_read(&osdc->lock);
2748 registered = __linger_registered(lreq);
2749 up_read(&osdc->lock);
2750
2751 return registered;
2752}
2753
2754static void linger_register(struct ceph_osd_linger_request *lreq)
2755{
2756 struct ceph_osd_client *osdc = lreq->osdc;
2757
2758 verify_osdc_wrlocked(osdc);
2759 WARN_ON(lreq->linger_id);
2760
2761 linger_get(lreq);
2762 lreq->linger_id = ++osdc->last_linger_id;
2763 insert_linger_osdc(&osdc->linger_requests, lreq);
2764}
2765
2766static void linger_unregister(struct ceph_osd_linger_request *lreq)
2767{
2768 struct ceph_osd_client *osdc = lreq->osdc;
2769
2770 verify_osdc_wrlocked(osdc);
2771
2772 erase_linger_osdc(&osdc->linger_requests, lreq);
2773 linger_put(lreq);
2774}
2775
2776static void cancel_linger_request(struct ceph_osd_request *req)
2777{
2778 struct ceph_osd_linger_request *lreq = req->r_priv;
2779
2780 WARN_ON(!req->r_linger);
2781 cancel_request(req);
2782 linger_put(lreq);
2783}
2784
2785struct linger_work {
2786 struct work_struct work;
2787 struct ceph_osd_linger_request *lreq;
b07d3c4b
ID		 2788 struct list_head pending_item;
2789 unsigned long queued_stamp;
922dab61
ID		 2790
2791 union {
2792 struct {
2793 u64 notify_id;
2794 u64 notifier_id;
2795 void *payload; /* points into @msg front */
2796 size_t payload_len;
2797
2798 struct ceph_msg *msg; /* for ceph_msg_put() */
2799 } notify;
2800 struct {
2801 int err;
2802 } error;
2803 };
2804};
2805
2806static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2807 work_func_t workfn)
2808{
2809 struct linger_work *lwork;
2810
2811 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2812 if (!lwork)
2813 return NULL;
2814
2815 INIT_WORK(&lwork->work, workfn);
b07d3c4b 2816 INIT_LIST_HEAD(&lwork->pending_item);
922dab61
ID		 2817 lwork->lreq = linger_get(lreq);
2818
2819 return lwork;
2820}
2821
2822static void lwork_free(struct linger_work *lwork)
2823{
2824 struct ceph_osd_linger_request *lreq = lwork->lreq;
2825
b07d3c4b
ID		 2826 mutex_lock(&lreq->lock);
2827 list_del(&lwork->pending_item);
2828 mutex_unlock(&lreq->lock);
2829
922dab61
ID		 2830 linger_put(lreq);
2831 kfree(lwork);
2832}
2833
2834static void lwork_queue(struct linger_work *lwork)
2835{
2836 struct ceph_osd_linger_request *lreq = lwork->lreq;
2837 struct ceph_osd_client *osdc = lreq->osdc;
2838
2839 verify_lreq_locked(lreq);
b07d3c4b
ID		 2840 WARN_ON(!list_empty(&lwork->pending_item));
2841
2842 lwork->queued_stamp = jiffies;
2843 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
922dab61
ID		 2844 queue_work(osdc->notify_wq, &lwork->work);
2845}
2846
2847static void do_watch_notify(struct work_struct *w)
2848{
2849 struct linger_work *lwork = container_of(w, struct linger_work, work);
2850 struct ceph_osd_linger_request *lreq = lwork->lreq;
2851
2852 if (!linger_registered(lreq)) {
2853 dout("%s lreq %p not registered\n", __func__, lreq);
2854 goto out;
2855 }
2856
19079203 2857 WARN_ON(!lreq->is_watch);
922dab61
ID		 2858 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2859 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2860 lwork->notify.payload_len);
2861 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2862 lwork->notify.notifier_id, lwork->notify.payload,
2863 lwork->notify.payload_len);
2864
2865out:
2866 ceph_msg_put(lwork->notify.msg);
2867 lwork_free(lwork);
2868}
2869
2870static void do_watch_error(struct work_struct *w)
2871{
2872 struct linger_work *lwork = container_of(w, struct linger_work, work);
2873 struct ceph_osd_linger_request *lreq = lwork->lreq;
2874
2875 if (!linger_registered(lreq)) {
2876 dout("%s lreq %p not registered\n", __func__, lreq);
2877 goto out;
2878 }
2879
2880 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2881 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2882
2883out:
2884 lwork_free(lwork);
2885}
2886
2887static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2888{
2889 struct linger_work *lwork;
2890
2891 lwork = lwork_alloc(lreq, do_watch_error);
2892 if (!lwork) {
2893 pr_err("failed to allocate error-lwork\n");
2894 return;
2895 }
2896
2897 lwork->error.err = lreq->last_error;
2898 lwork_queue(lwork);
2899}
2900
2901static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2902 int result)
2903{
2904 if (!completion_done(&lreq->reg_commit_wait)) {
2905 lreq->reg_commit_error = (result <= 0 ? result : 0);
2906 complete_all(&lreq->reg_commit_wait);
2907 }
2908}
2909
2910static void linger_commit_cb(struct ceph_osd_request *req)
2911{
2912 struct ceph_osd_linger_request *lreq = req->r_priv;
2913
2914 mutex_lock(&lreq->lock);
2915 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2916 lreq->linger_id, req->r_result);
922dab61
ID		 2917 linger_reg_commit_complete(lreq, req->r_result);
2918 lreq->committed = true;
2919
19079203
ID		 2920 if (!lreq->is_watch) {
2921 struct ceph_osd_data *osd_data =
2922 osd_req_op_data(req, 0, notify, response_data);
2923 void *p = page_address(osd_data->pages[0]);
2924
2925 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2926 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2927
2928 /* make note of the notify_id */
2929 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2930 lreq->notify_id = ceph_decode_64(&p);
2931 dout("lreq %p notify_id %llu\n", lreq,
2932 lreq->notify_id);
2933 } else {
2934 dout("lreq %p no notify_id\n", lreq);
2935 }
2936 }
2937
922dab61
ID		 2938 mutex_unlock(&lreq->lock);
2939 linger_put(lreq);
2940}
2941
2942static int normalize_watch_error(int err)
2943{
2944 /*
2945 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2946 * notification and a failure to reconnect because we raced with
2947 * the delete appear the same to the user.
2948 */
2949 if (err == -ENOENT)
2950 err = -ENOTCONN;
2951
2952 return err;
2953}
2954
2955static void linger_reconnect_cb(struct ceph_osd_request *req)
2956{
2957 struct ceph_osd_linger_request *lreq = req->r_priv;
2958
2959 mutex_lock(&lreq->lock);
2960 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2961 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2962 if (req->r_result < 0) {
2963 if (!lreq->last_error) {
2964 lreq->last_error = normalize_watch_error(req->r_result);
2965 queue_watch_error(lreq);
2966 }
2967 }
2968
2969 mutex_unlock(&lreq->lock);
2970 linger_put(lreq);
2971}
2972
2973static void send_linger(struct ceph_osd_linger_request *lreq)
2974{
2975 struct ceph_osd_request *req = lreq->reg_req;
2976 struct ceph_osd_req_op *op = &req->r_ops[0];
2977
2978 verify_osdc_wrlocked(req->r_osdc);
2979 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2980
2981 if (req->r_osd)
2982 cancel_linger_request(req);
2983
2984 request_reinit(req);
2985 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2986 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2987 req->r_flags = lreq->t.flags;
2988 req->r_mtime = lreq->mtime;
2989
2990 mutex_lock(&lreq->lock);
19079203 2991 if (lreq->is_watch && lreq->committed) {
922dab61
ID		 2992 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2993 op->watch.cookie != lreq->linger_id);
2994 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2995 op->watch.gen = ++lreq->register_gen;
2996 dout("lreq %p reconnect register_gen %u\n", lreq,
2997 op->watch.gen);
2998 req->r_callback = linger_reconnect_cb;
2999 } else {
19079203
ID		 3000 if (!lreq->is_watch)
3001 lreq->notify_id = 0;
3002 else
3003 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 3004 dout("lreq %p register\n", lreq);
3005 req->r_callback = linger_commit_cb;
3006 }
3007 mutex_unlock(&lreq->lock);
3008
3009 req->r_priv = linger_get(lreq);
3010 req->r_linger = true;
3011
3012 submit_request(req, true);
3013}
3014
3015static void linger_ping_cb(struct ceph_osd_request *req)
3016{
3017 struct ceph_osd_linger_request *lreq = req->r_priv;
3018
3019 mutex_lock(&lreq->lock);
3020 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3021 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3022 lreq->last_error);
3023 if (lreq->register_gen == req->r_ops[0].watch.gen) {
b07d3c4b
ID		 3024 if (!req->r_result) {
3025 lreq->watch_valid_thru = lreq->ping_sent;
3026 } else if (!lreq->last_error) {
922dab61
ID		 3027 lreq->last_error = normalize_watch_error(req->r_result);
3028 queue_watch_error(lreq);
3029 }
3030 } else {
3031 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3032 lreq->register_gen, req->r_ops[0].watch.gen);
3033 }
3034
3035 mutex_unlock(&lreq->lock);
3036 linger_put(lreq);
3037}
3038
3039static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3040{
3041 struct ceph_osd_client *osdc = lreq->osdc;
3042 struct ceph_osd_request *req = lreq->ping_req;
3043 struct ceph_osd_req_op *op = &req->r_ops[0];
3044
b7ec35b3 3045 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
922dab61
ID		 3046 dout("%s PAUSERD\n", __func__);
3047 return;
3048 }
3049
3050 lreq->ping_sent = jiffies;
3051 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3052 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3053 lreq->register_gen);
3054
3055 if (req->r_osd)
3056 cancel_linger_request(req);
3057
3058 request_reinit(req);
3059 target_copy(&req->r_t, &lreq->t);
3060
3061 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3062 op->watch.cookie != lreq->linger_id ||
3063 op->watch.op != CEPH_OSD_WATCH_OP_PING);
3064 op->watch.gen = lreq->register_gen;
3065 req->r_callback = linger_ping_cb;
3066 req->r_priv = linger_get(lreq);
3067 req->r_linger = true;
3068
3069 ceph_osdc_get_request(req);
3070 account_request(req);
3071 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3072 link_request(lreq->osd, req);
3073 send_request(req);
3074}
3075
3076static void linger_submit(struct ceph_osd_linger_request *lreq)
3077{
3078 struct ceph_osd_client *osdc = lreq->osdc;
3079 struct ceph_osd *osd;
3080
81c65213
ID		 3081 down_write(&osdc->lock);
3082 linger_register(lreq);
3083 if (lreq->is_watch) {
3084 lreq->reg_req->r_ops[0].watch.cookie = lreq->linger_id;
3085 lreq->ping_req->r_ops[0].watch.cookie = lreq->linger_id;
3086 } else {
3087 lreq->reg_req->r_ops[0].notify.cookie = lreq->linger_id;
3088 }
3089
7de030d6 3090 calc_target(osdc, &lreq->t, NULL, false);
922dab61
ID		 3091 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3092 link_linger(osd, lreq);
3093
3094 send_linger(lreq);
81c65213 3095 up_write(&osdc->lock);
922dab61
ID		 3096}
3097
4609245e
ID		 3098static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3099{
3100 struct ceph_osd_client *osdc = lreq->osdc;
3101 struct ceph_osd_linger_request *lookup_lreq;
3102
3103 verify_osdc_wrlocked(osdc);
3104
3105 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3106 lreq->linger_id);
3107 if (!lookup_lreq)
3108 return;
3109
3110 WARN_ON(lookup_lreq != lreq);
3111 erase_linger_mc(&osdc->linger_map_checks, lreq);
3112 linger_put(lreq);
3113}
3114
922dab61
ID		 3115/*
3116 * @lreq has to be both registered and linked.
3117 */
3118static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3119{
19079203 3120 if (lreq->is_watch && lreq->ping_req->r_osd)
922dab61
ID		 3121 cancel_linger_request(lreq->ping_req);
3122 if (lreq->reg_req->r_osd)
3123 cancel_linger_request(lreq->reg_req);
4609245e 3124 cancel_linger_map_check(lreq);
922dab61
ID		 3125 unlink_linger(lreq->osd, lreq);
3126 linger_unregister(lreq);
3127}
3128
3129static void linger_cancel(struct ceph_osd_linger_request *lreq)
3130{
3131 struct ceph_osd_client *osdc = lreq->osdc;
3132
3133 down_write(&osdc->lock);
3134 if (__linger_registered(lreq))
3135 __linger_cancel(lreq);
3136 up_write(&osdc->lock);
3137}
3138
4609245e
ID		 3139static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3140
3141static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3142{
3143 struct ceph_osd_client *osdc = lreq->osdc;
3144 struct ceph_osdmap *map = osdc->osdmap;
3145
3146 verify_osdc_wrlocked(osdc);
3147 WARN_ON(!map->epoch);
3148
3149 if (lreq->register_gen) {
3150 lreq->map_dne_bound = map->epoch;
3151 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3152 lreq, lreq->linger_id);
3153 } else {
3154 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3155 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3156 map->epoch);
3157 }
3158
3159 if (lreq->map_dne_bound) {
3160 if (map->epoch >= lreq->map_dne_bound) {
3161 /* we had a new enough map */
3162 pr_info("linger_id %llu pool does not exist\n",
3163 lreq->linger_id);
3164 linger_reg_commit_complete(lreq, -ENOENT);
3165 __linger_cancel(lreq);
3166 }
3167 } else {
3168 send_linger_map_check(lreq);
3169 }
3170}
3171
3172static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3173{
3174 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3175 struct ceph_osd_linger_request *lreq;
3176 u64 linger_id = greq->private_data;
3177
3178 WARN_ON(greq->result || !greq->u.newest);
3179
3180 down_write(&osdc->lock);
3181 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3182 if (!lreq) {
3183 dout("%s linger_id %llu dne\n", __func__, linger_id);
3184 goto out_unlock;
3185 }
3186
3187 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3188 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3189 greq->u.newest);
3190 if (!lreq->map_dne_bound)
3191 lreq->map_dne_bound = greq->u.newest;
3192 erase_linger_mc(&osdc->linger_map_checks, lreq);
3193 check_linger_pool_dne(lreq);
3194
3195 linger_put(lreq);
3196out_unlock:
3197 up_write(&osdc->lock);
3198}
3199
3200static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3201{
3202 struct ceph_osd_client *osdc = lreq->osdc;
3203 struct ceph_osd_linger_request *lookup_lreq;
3204 int ret;
3205
3206 verify_osdc_wrlocked(osdc);
3207
3208 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3209 lreq->linger_id);
3210 if (lookup_lreq) {
3211 WARN_ON(lookup_lreq != lreq);
3212 return;
3213 }
3214
3215 linger_get(lreq);
3216 insert_linger_mc(&osdc->linger_map_checks, lreq);
3217 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3218 linger_map_check_cb, lreq->linger_id);
3219 WARN_ON(ret);
3220}
3221
922dab61
ID		 3222static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3223{
3224 int ret;
3225
3226 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3227 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3228 return ret ?: lreq->reg_commit_error;
3229}
3230
19079203
ID		 3231static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3232{
3233 int ret;
3234
3235 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3236 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3237 return ret ?: lreq->notify_finish_error;
3238}
3239
f24e9980 3240/*
fbca9635
ID		 3241 * Timeout callback, called every N seconds. When 1 or more OSD
3242 * requests has been active for more than N seconds, we send a keepalive
3243 * (tag + timestamp) to its OSD to ensure any communications channel
3244 * reset is detected.
f24e9980
SW		 3245 */
3246static void handle_timeout(struct work_struct *work)
3247{
3248 struct ceph_osd_client *osdc =
3249 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 3250 struct ceph_options *opts = osdc->client->options;
5aea3dcd 3251 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
7cc5e38f 3252 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
5aea3dcd
ID		 3253 LIST_HEAD(slow_osds);
3254 struct rb_node *n, *p;
f24e9980 3255
5aea3dcd
ID		 3256 dout("%s osdc %p\n", __func__, osdc);
3257 down_write(&osdc->lock);
f24e9980 3258
422d2cb8
YS		 3259 /*
3260 * ping osds that are a bit slow. this ensures that if there
3261 * is a break in the TCP connection we will notice, and reopen
3262 * a connection with that osd (from the fault callback).
3263 */
5aea3dcd
ID		 3264 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3265 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3266 bool found = false;
3267
7cc5e38f 3268 for (p = rb_first(&osd->o_requests); p; ) {
5aea3dcd
ID		 3269 struct ceph_osd_request *req =
3270 rb_entry(p, struct ceph_osd_request, r_node);
3271
7cc5e38f
ID		 3272 p = rb_next(p); /* abort_request() */
3273
5aea3dcd
ID		 3274 if (time_before(req->r_stamp, cutoff)) {
3275 dout(" req %p tid %llu on osd%d is laggy\n",
3276 req, req->r_tid, osd->o_osd);
3277 found = true;
3278 }
7cc5e38f
ID		 3279 if (opts->osd_request_timeout &&
3280 time_before(req->r_start_stamp, expiry_cutoff)) {
3281 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3282 req->r_tid, osd->o_osd);
3283 abort_request(req, -ETIMEDOUT);
3284 }
5aea3dcd 3285 }
922dab61
ID		 3286 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3287 struct ceph_osd_linger_request *lreq =
3288 rb_entry(p, struct ceph_osd_linger_request, node);
3289
3290 dout(" lreq %p linger_id %llu is served by osd%d\n",
3291 lreq, lreq->linger_id, osd->o_osd);
3292 found = true;
3293
3294 mutex_lock(&lreq->lock);
19079203 3295 if (lreq->is_watch && lreq->committed && !lreq->last_error)
922dab61
ID		 3296 send_linger_ping(lreq);
3297 mutex_unlock(&lreq->lock);
3298 }
422d2cb8 3299
5aea3dcd
ID		 3300 if (found)
3301 list_move_tail(&osd->o_keepalive_item, &slow_osds);
422d2cb8 3302 }
5aea3dcd 3303
7cc5e38f
ID		 3304 if (opts->osd_request_timeout) {
3305 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3306 struct ceph_osd_request *req =
3307 rb_entry(p, struct ceph_osd_request, r_node);
3308
3309 p = rb_next(p); /* abort_request() */
3310
3311 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3312 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3313 req->r_tid, osdc->homeless_osd.o_osd);
3314 abort_request(req, -ETIMEDOUT);
3315 }
3316 }
3317 }
3318
5aea3dcd
ID		 3319 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3320 maybe_request_map(osdc);
3321
422d2cb8 3322 while (!list_empty(&slow_osds)) {
5aea3dcd
ID		 3323 struct ceph_osd *osd = list_first_entry(&slow_osds,
3324 struct ceph_osd,
3325 o_keepalive_item);
422d2cb8 3326 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 3327 ceph_con_keepalive(&osd->o_con);
3328 }
3329
5aea3dcd 3330 up_write(&osdc->lock);
fbca9635
ID		 3331 schedule_delayed_work(&osdc->timeout_work,
3332 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 3333}
3334
f5a2041b
YS		 3335static void handle_osds_timeout(struct work_struct *work)
3336{
3337 struct ceph_osd_client *osdc =
3338 container_of(work, struct ceph_osd_client,
3339 osds_timeout_work.work);
a319bf56 3340 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 3341 struct ceph_osd *osd, *nosd;
f5a2041b 3342
42a2c09f 3343 dout("%s osdc %p\n", __func__, osdc);
5aea3dcd 3344 down_write(&osdc->lock);
42a2c09f
ID		 3345 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3346 if (time_before(jiffies, osd->lru_ttl))
3347 break;
3348
5aea3dcd 3349 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 3350 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
5aea3dcd 3351 close_osd(osd);
42a2c09f 3352 }
f5a2041b 3353
5aea3dcd 3354 up_write(&osdc->lock);
f5a2041b
YS		 3355 schedule_delayed_work(&osdc->osds_timeout_work,
3356 round_jiffies_relative(delay));
3357}
3358
205ee118
ID		 3359static int ceph_oloc_decode(void **p, void *end,
3360 struct ceph_object_locator *oloc)
3361{
3362 u8 struct_v, struct_cv;
3363 u32 len;
3364 void *struct_end;
3365 int ret = 0;
3366
3367 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3368 struct_v = ceph_decode_8(p);
3369 struct_cv = ceph_decode_8(p);
3370 if (struct_v < 3) {
3371 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3372 struct_v, struct_cv);
3373 goto e_inval;
3374 }
3375 if (struct_cv > 6) {
3376 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3377 struct_v, struct_cv);
3378 goto e_inval;
3379 }
3380 len = ceph_decode_32(p);
3381 ceph_decode_need(p, end, len, e_inval);
3382 struct_end = *p + len;
3383
3384 oloc->pool = ceph_decode_64(p);
3385 *p += 4; /* skip preferred */
3386
3387 len = ceph_decode_32(p);
3388 if (len > 0) {
3389 pr_warn("ceph_object_locator::key is set\n");
3390 goto e_inval;
3391 }
3392
3393 if (struct_v >= 5) {
cd08e0a2
YZ		 3394 bool changed = false;
3395
205ee118
ID		 3396 len = ceph_decode_32(p);
3397 if (len > 0) {
30c156d9 3398 ceph_decode_need(p, end, len, e_inval);
cd08e0a2
YZ		 3399 if (!oloc->pool_ns ||
3400 ceph_compare_string(oloc->pool_ns, *p, len))
3401 changed = true;
30c156d9 3402 *p += len;
cd08e0a2
YZ		 3403 } else {
3404 if (oloc->pool_ns)
3405 changed = true;
3406 }
3407 if (changed) {
3408 /* redirect changes namespace */
3409 pr_warn("ceph_object_locator::nspace is changed\n");
3410 goto e_inval;
205ee118
ID		 3411 }
3412 }
3413
3414 if (struct_v >= 6) {
3415 s64 hash = ceph_decode_64(p);
3416 if (hash != -1) {
3417 pr_warn("ceph_object_locator::hash is set\n");
3418 goto e_inval;
3419 }
3420 }
3421
3422 /* skip the rest */
3423 *p = struct_end;
3424out:
3425 return ret;
3426
3427e_inval:
3428 ret = -EINVAL;
3429 goto out;
3430}
3431
3432static int ceph_redirect_decode(void **p, void *end,
3433 struct ceph_request_redirect *redir)
3434{
3435 u8 struct_v, struct_cv;
3436 u32 len;
3437 void *struct_end;
3438 int ret;
3439
3440 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3441 struct_v = ceph_decode_8(p);
3442 struct_cv = ceph_decode_8(p);
3443 if (struct_cv > 1) {
3444 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3445 struct_v, struct_cv);
3446 goto e_inval;
3447 }
3448 len = ceph_decode_32(p);
3449 ceph_decode_need(p, end, len, e_inval);
3450 struct_end = *p + len;
3451
3452 ret = ceph_oloc_decode(p, end, &redir->oloc);
3453 if (ret)
3454 goto out;
3455
3456 len = ceph_decode_32(p);
3457 if (len > 0) {
3458 pr_warn("ceph_request_redirect::object_name is set\n");
3459 goto e_inval;
3460 }
3461
3462 len = ceph_decode_32(p);
3463 *p += len; /* skip osd_instructions */
3464
3465 /* skip the rest */
3466 *p = struct_end;
3467out:
3468 return ret;
3469
3470e_inval:
3471 ret = -EINVAL;
3472 goto out;
3473}
3474
fe5da05e
ID		 3475struct MOSDOpReply {
3476 struct ceph_pg pgid;
3477 u64 flags;
3478 int result;
3479 u32 epoch;
3480 int num_ops;
3481 u32 outdata_len[CEPH_OSD_MAX_OPS];
3482 s32 rval[CEPH_OSD_MAX_OPS];
3483 int retry_attempt;
3484 struct ceph_eversion replay_version;
3485 u64 user_version;
3486 struct ceph_request_redirect redirect;
3487};
25845472 3488
fe5da05e 3489static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 3490{
fe5da05e
ID		 3491 void *p = msg->front.iov_base;
3492 void *const end = p + msg->front.iov_len;
3493 u16 version = le16_to_cpu(msg->hdr.version);
3494 struct ceph_eversion bad_replay_version;
b0b31a8f 3495 u8 decode_redir;
fe5da05e
ID		 3496 u32 len;
3497 int ret;
3498 int i;
1b83bef2 3499
fe5da05e
ID		 3500 ceph_decode_32_safe(&p, end, len, e_inval);
3501 ceph_decode_need(&p, end, len, e_inval);
3502 p += len; /* skip oid */
1b83bef2 3503
fe5da05e
ID		 3504 ret = ceph_decode_pgid(&p, end, &m->pgid);
3505 if (ret)
3506 return ret;
1b83bef2 3507
fe5da05e
ID		 3508 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3509 ceph_decode_32_safe(&p, end, m->result, e_inval);
3510 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3511 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3512 p += sizeof(bad_replay_version);
3513 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 3514
fe5da05e
ID		 3515 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3516 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3517 goto e_inval;
1b83bef2 3518
fe5da05e
ID		 3519 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3520 e_inval);
3521 for (i = 0; i < m->num_ops; i++) {
1b83bef2 3522 struct ceph_osd_op *op = p;
1b83bef2 3523
fe5da05e 3524 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 3525 p += sizeof(*op);
3526 }
1b83bef2 3527
fe5da05e
ID		 3528 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3529 for (i = 0; i < m->num_ops; i++)
3530 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 3531
fe5da05e
ID		 3532 if (version >= 5) {
3533 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3534 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3535 p += sizeof(m->replay_version);
3536 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3537 } else {
3538 m->replay_version = bad_replay_version; /* struct */
3539 m->user_version = le64_to_cpu(m->replay_version.version);
3540 }
eb845ff1 3541
fe5da05e
ID		 3542 if (version >= 6) {
3543 if (version >= 7)
3544 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 3545 else
3546 decode_redir = 1;
3547 } else {
3548 decode_redir = 0;
3549 }
3550
3551 if (decode_redir) {
fe5da05e
ID		 3552 ret = ceph_redirect_decode(&p, end, &m->redirect);
3553 if (ret)
3554 return ret;
205ee118 3555 } else {
fe5da05e 3556 ceph_oloc_init(&m->redirect.oloc);
205ee118 3557 }
f24e9980 3558
fe5da05e
ID		 3559 return 0;
3560
3561e_inval:
3562 return -EINVAL;
3563}
3564
3565/*
b18b9550
ID		 3566 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3567 * specified.
fe5da05e 3568 */
5aea3dcd 3569static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
fe5da05e 3570{
5aea3dcd 3571 struct ceph_osd_client *osdc = osd->o_osdc;
fe5da05e
ID		 3572 struct ceph_osd_request *req;
3573 struct MOSDOpReply m;
3574 u64 tid = le64_to_cpu(msg->hdr.tid);
3575 u32 data_len = 0;
fe5da05e
ID		 3576 int ret;
3577 int i;
3578
3579 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3580
5aea3dcd
ID		 3581 down_read(&osdc->lock);
3582 if (!osd_registered(osd)) {
3583 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3584 goto out_unlock_osdc;
3585 }
3586 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3587
3588 mutex_lock(&osd->lock);
3589 req = lookup_request(&osd->o_requests, tid);
fe5da05e 3590 if (!req) {
5aea3dcd
ID		 3591 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3592 goto out_unlock_session;
fe5da05e 3593 }
fe5da05e 3594
cd08e0a2 3595 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
fe5da05e 3596 ret = decode_MOSDOpReply(msg, &m);
cd08e0a2 3597 m.redirect.oloc.pool_ns = NULL;
fe5da05e
ID		 3598 if (ret) {
3599 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3600 req->r_tid, ret);
3601 ceph_msg_dump(msg);
3602 goto fail_request;
3603 }
3604 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3605 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3606 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3607 le64_to_cpu(m.replay_version.version), m.user_version);
3608
3609 if (m.retry_attempt >= 0) {
3610 if (m.retry_attempt != req->r_attempts - 1) {
3611 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3612 req, req->r_tid, m.retry_attempt,
3613 req->r_attempts - 1);
5aea3dcd 3614 goto out_unlock_session;
fe5da05e
ID		 3615 }
3616 } else {
3617 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3618 }
3619
3620 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3621 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3622 m.redirect.oloc.pool);
5aea3dcd
ID		 3623 unlink_request(osd, req);
3624 mutex_unlock(&osd->lock);
205ee118 3625
30c156d9
YZ		 3626 /*
3627 * Not ceph_oloc_copy() - changing pool_ns is not
3628 * supported.
3629 */
3630 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
5aea3dcd
ID		 3631 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
3632 req->r_tid = 0;
3633 __submit_request(req, false);
3634 goto out_unlock_osdc;
205ee118
ID		 3635 }
3636
fe5da05e
ID		 3637 if (m.num_ops != req->r_num_ops) {
3638 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3639 req->r_num_ops, req->r_tid);
3640 goto fail_request;
f24e9980 3641 }
fe5da05e
ID		 3642 for (i = 0; i < req->r_num_ops; i++) {
3643 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3644 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3645 req->r_ops[i].rval = m.rval[i];
3646 req->r_ops[i].outdata_len = m.outdata_len[i];
3647 data_len += m.outdata_len[i];
3648 }
3649 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3650 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3651 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3652 goto fail_request;
3653 }
b18b9550
ID		 3654 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3655 req, req->r_tid, m.result, data_len);
f24e9980 3656
b18b9550
ID		 3657 /*
3658 * Since we only ever request ONDISK, we should only ever get
3659 * one (type of) reply back.
3660 */
3661 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3662 req->r_result = m.result ?: data_len;
3663 finish_request(req);
5aea3dcd
ID		 3664 mutex_unlock(&osd->lock);
3665 up_read(&osdc->lock);
f24e9980 3666
b18b9550 3667 __complete_request(req);
f24e9980
SW		 3668 return;
3669
fe5da05e 3670fail_request:
4609245e 3671 complete_request(req, -EIO);
5aea3dcd
ID		 3672out_unlock_session:
3673 mutex_unlock(&osd->lock);
3674out_unlock_osdc:
3675 up_read(&osdc->lock);
f24e9980
SW		 3676}
3677
42c1b124
ID		 3678static void set_pool_was_full(struct ceph_osd_client *osdc)
3679{
3680 struct rb_node *n;
3681
3682 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3683 struct ceph_pg_pool_info *pi =
3684 rb_entry(n, struct ceph_pg_pool_info, node);
3685
3686 pi->was_full = __pool_full(pi);
3687 }
3688}
3689
5aea3dcd 3690static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
f24e9980 3691{
5aea3dcd 3692 struct ceph_pg_pool_info *pi;
f24e9980 3693
5aea3dcd
ID		 3694 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3695 if (!pi)
3696 return false;
f24e9980 3697
5aea3dcd 3698 return pi->was_full && !__pool_full(pi);
422d2cb8
YS		 3699}
3700
922dab61
ID		 3701static enum calc_target_result
3702recalc_linger_target(struct ceph_osd_linger_request *lreq)
3703{
3704 struct ceph_osd_client *osdc = lreq->osdc;
3705 enum calc_target_result ct_res;
3706
7de030d6 3707 ct_res = calc_target(osdc, &lreq->t, NULL, true);
922dab61
ID		 3708 if (ct_res == CALC_TARGET_NEED_RESEND) {
3709 struct ceph_osd *osd;
3710
3711 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3712 if (osd != lreq->osd) {
3713 unlink_linger(lreq->osd, lreq);
3714 link_linger(osd, lreq);
3715 }
3716 }
3717
3718 return ct_res;
3719}
3720
422d2cb8 3721/*
5aea3dcd 3722 * Requeue requests whose mapping to an OSD has changed.
422d2cb8 3723 */
5aea3dcd
ID		 3724static void scan_requests(struct ceph_osd *osd,
3725 bool force_resend,
3726 bool cleared_full,
3727 bool check_pool_cleared_full,
3728 struct rb_root *need_resend,
3729 struct list_head *need_resend_linger)
422d2cb8 3730{
5aea3dcd
ID		 3731 struct ceph_osd_client *osdc = osd->o_osdc;
3732 struct rb_node *n;
3733 bool force_resend_writes;
3734
922dab61
ID		 3735 for (n = rb_first(&osd->o_linger_requests); n; ) {
3736 struct ceph_osd_linger_request *lreq =
3737 rb_entry(n, struct ceph_osd_linger_request, node);
3738 enum calc_target_result ct_res;
3739
3740 n = rb_next(n); /* recalc_linger_target() */
3741
3742 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3743 lreq->linger_id);
3744 ct_res = recalc_linger_target(lreq);
3745 switch (ct_res) {
3746 case CALC_TARGET_NO_ACTION:
3747 force_resend_writes = cleared_full ||
3748 (check_pool_cleared_full &&
3749 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3750 if (!force_resend && !force_resend_writes)
3751 break;
3752
3753 /* fall through */
3754 case CALC_TARGET_NEED_RESEND:
4609245e 3755 cancel_linger_map_check(lreq);
922dab61
ID		 3756 /*
3757 * scan_requests() for the previous epoch(s)
3758 * may have already added it to the list, since
3759 * it's not unlinked here.
3760 */
3761 if (list_empty(&lreq->scan_item))
3762 list_add_tail(&lreq->scan_item, need_resend_linger);
3763 break;
3764 case CALC_TARGET_POOL_DNE:
a10bcb19 3765 list_del_init(&lreq->scan_item);
4609245e 3766 check_linger_pool_dne(lreq);
922dab61
ID		 3767 break;
3768 }
3769 }
3770
5aea3dcd
ID		 3771 for (n = rb_first(&osd->o_requests); n; ) {
3772 struct ceph_osd_request *req =
3773 rb_entry(n, struct ceph_osd_request, r_node);
3774 enum calc_target_result ct_res;
3775
4609245e 3776 n = rb_next(n); /* unlink_request(), check_pool_dne() */
5aea3dcd
ID		 3777
3778 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
7de030d6
ID		 3779 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
3780 false);
5aea3dcd
ID		 3781 switch (ct_res) {
3782 case CALC_TARGET_NO_ACTION:
3783 force_resend_writes = cleared_full ||
3784 (check_pool_cleared_full &&
3785 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3786 if (!force_resend &&
3787 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3788 !force_resend_writes))
3789 break;
3790
3791 /* fall through */
3792 case CALC_TARGET_NEED_RESEND:
4609245e 3793 cancel_map_check(req);
5aea3dcd
ID		 3794 unlink_request(osd, req);
3795 insert_request(need_resend, req);
3796 break;
3797 case CALC_TARGET_POOL_DNE:
4609245e 3798 check_pool_dne(req);
5aea3dcd 3799 break;
b0494532 3800 }
6f6c7006 3801 }
422d2cb8 3802}
6f6c7006 3803
42c1b124 3804static int handle_one_map(struct ceph_osd_client *osdc,
5aea3dcd
ID		 3805 void *p, void *end, bool incremental,
3806 struct rb_root *need_resend,
3807 struct list_head *need_resend_linger)
42c1b124
ID		 3808{
3809 struct ceph_osdmap *newmap;
3810 struct rb_node *n;
3811 bool skipped_map = false;
3812 bool was_full;
3813
b7ec35b3 3814 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
42c1b124
ID		 3815 set_pool_was_full(osdc);
3816
3817 if (incremental)
3818 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3819 else
3820 newmap = ceph_osdmap_decode(&p, end);
3821 if (IS_ERR(newmap))
3822 return PTR_ERR(newmap);
3823
3824 if (newmap != osdc->osdmap) {
3825 /*
3826 * Preserve ->was_full before destroying the old map.
3827 * For pools that weren't in the old map, ->was_full
3828 * should be false.
3829 */
3830 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3831 struct ceph_pg_pool_info *pi =
3832 rb_entry(n, struct ceph_pg_pool_info, node);
3833 struct ceph_pg_pool_info *old_pi;
3834
3835 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3836 if (old_pi)
3837 pi->was_full = old_pi->was_full;
3838 else
3839 WARN_ON(pi->was_full);
3840 }
3841
3842 if (osdc->osdmap->epoch &&
3843 osdc->osdmap->epoch + 1 < newmap->epoch) {
3844 WARN_ON(incremental);
3845 skipped_map = true;
3846 }
3847
3848 ceph_osdmap_destroy(osdc->osdmap);
3849 osdc->osdmap = newmap;
3850 }
3851
b7ec35b3 3852 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
5aea3dcd
ID		 3853 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3854 need_resend, need_resend_linger);
3855
3856 for (n = rb_first(&osdc->osds); n; ) {
3857 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3858
3859 n = rb_next(n); /* close_osd() */
3860
3861 scan_requests(osd, skipped_map, was_full, true, need_resend,
3862 need_resend_linger);
3863 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3864 memcmp(&osd->o_con.peer_addr,
3865 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3866 sizeof(struct ceph_entity_addr)))
3867 close_osd(osd);
3868 }
42c1b124
ID		 3869
3870 return 0;
3871}
6f6c7006 3872
5aea3dcd
ID		 3873static void kick_requests(struct ceph_osd_client *osdc,
3874 struct rb_root *need_resend,
3875 struct list_head *need_resend_linger)
3876{
922dab61 3877 struct ceph_osd_linger_request *lreq, *nlreq;
04c7d789 3878 enum calc_target_result ct_res;
5aea3dcd
ID		 3879 struct rb_node *n;
3880
04c7d789
ID		 3881 /* make sure need_resend targets reflect latest map */
3882 for (n = rb_first(need_resend); n; ) {
3883 struct ceph_osd_request *req =
3884 rb_entry(n, struct ceph_osd_request, r_node);
3885
3886 n = rb_next(n);
3887
3888 if (req->r_t.epoch < osdc->osdmap->epoch) {
3889 ct_res = calc_target(osdc, &req->r_t, NULL, false);
3890 if (ct_res == CALC_TARGET_POOL_DNE) {
3891 erase_request(need_resend, req);
3892 check_pool_dne(req);
3893 }
3894 }
3895 }
3896
5aea3dcd
ID		 3897 for (n = rb_first(need_resend); n; ) {
3898 struct ceph_osd_request *req =
3899 rb_entry(n, struct ceph_osd_request, r_node);
3900 struct ceph_osd *osd;
3901
3902 n = rb_next(n);
3903 erase_request(need_resend, req); /* before link_request() */
3904
5aea3dcd
ID		 3905 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3906 link_request(osd, req);
3907 if (!req->r_linger) {
3908 if (!osd_homeless(osd) && !req->r_t.paused)
3909 send_request(req);
922dab61
ID		 3910 } else {
3911 cancel_linger_request(req);
5aea3dcd
ID		 3912 }
3913 }
922dab61
ID		 3914
3915 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3916 if (!osd_homeless(lreq->osd))
3917 send_linger(lreq);
3918
3919 list_del_init(&lreq->scan_item);
3920 }
5aea3dcd
ID		 3921}
3922
f24e9980
SW		 3923/*
3924 * Process updated osd map.
3925 *
3926 * The message contains any number of incremental and full maps, normally
3927 * indicating some sort of topology change in the cluster. Kick requests
3928 * off to different OSDs as needed.
3929 */
3930void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3931{
42c1b124
ID		 3932 void *p = msg->front.iov_base;
3933 void *const end = p + msg->front.iov_len;
f24e9980
SW		 3934 u32 nr_maps, maplen;
3935 u32 epoch;
f24e9980 3936 struct ceph_fsid fsid;
5aea3dcd
ID		 3937 struct rb_root need_resend = RB_ROOT;
3938 LIST_HEAD(need_resend_linger);
42c1b124
ID		 3939 bool handled_incremental = false;
3940 bool was_pauserd, was_pausewr;
3941 bool pauserd, pausewr;
3942 int err;
f24e9980 3943
42c1b124 3944 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
5aea3dcd 3945 down_write(&osdc->lock);
f24e9980
SW		 3946
3947 /* verify fsid */
3948 ceph_decode_need(&p, end, sizeof(fsid), bad);
3949 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 3950 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 3951 goto bad;
f24e9980 3952
b7ec35b3
ID		 3953 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3954 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3955 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3956 have_pool_full(osdc);
9a1ea2db 3957
f24e9980
SW		 3958 /* incremental maps */
3959 ceph_decode_32_safe(&p, end, nr_maps, bad);
3960 dout(" %d inc maps\n", nr_maps);
3961 while (nr_maps > 0) {
3962 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3963 epoch = ceph_decode_32(&p);
3964 maplen = ceph_decode_32(&p);
f24e9980 3965 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 3966 if (osdc->osdmap->epoch &&
3967 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 3968 dout("applying incremental map %u len %d\n",
3969 epoch, maplen);
5aea3dcd
ID		 3970 err = handle_one_map(osdc, p, p + maplen, true,
3971 &need_resend, &need_resend_linger);
42c1b124 3972 if (err)
f24e9980 3973 goto bad;
42c1b124 3974 handled_incremental = true;
f24e9980
SW		 3975 } else {
3976 dout("ignoring incremental map %u len %d\n",
3977 epoch, maplen);
3978 }
42c1b124 3979 p += maplen;
f24e9980
SW		 3980 nr_maps--;
3981 }
42c1b124 3982 if (handled_incremental)
f24e9980
SW		 3983 goto done;
3984
3985 /* full maps */
3986 ceph_decode_32_safe(&p, end, nr_maps, bad);
3987 dout(" %d full maps\n", nr_maps);
3988 while (nr_maps) {
3989 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3990 epoch = ceph_decode_32(&p);
3991 maplen = ceph_decode_32(&p);
f24e9980
SW		 3992 ceph_decode_need(&p, end, maplen, bad);
3993 if (nr_maps > 1) {
3994 dout("skipping non-latest full map %u len %d\n",
3995 epoch, maplen);
e5253a7b 3996 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 3997 dout("skipping full map %u len %d, "
3998 "older than our %u\n", epoch, maplen,
3999 osdc->osdmap->epoch);
4000 } else {
4001 dout("taking full map %u len %d\n", epoch, maplen);
5aea3dcd
ID		 4002 err = handle_one_map(osdc, p, p + maplen, false,
4003 &need_resend, &need_resend_linger);
42c1b124 4004 if (err)
f24e9980 4005 goto bad;
f24e9980
SW		 4006 }
4007 p += maplen;
4008 nr_maps--;
4009 }
4010
4011done:
cd634fb6
SW		 4012 /*
4013 * subscribe to subsequent osdmap updates if full to ensure
4014 * we find out when we are no longer full and stop returning
4015 * ENOSPC.
4016 */
b7ec35b3
ID		 4017 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4018 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4019 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 4020 have_pool_full(osdc);
58eb7932
JL		 4021 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4022 osdc->osdmap->epoch < osdc->epoch_barrier)
42c1b124 4023 maybe_request_map(osdc);
cd634fb6 4024
5aea3dcd 4025 kick_requests(osdc, &need_resend, &need_resend_linger);
42c1b124 4026
fc36d0a4 4027 ceph_osdc_abort_on_full(osdc);
42c1b124
ID		 4028 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4029 osdc->osdmap->epoch);
5aea3dcd 4030 up_write(&osdc->lock);
03066f23 4031 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 4032 return;
4033
4034bad:
4035 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 4036 ceph_msg_dump(msg);
5aea3dcd
ID		 4037 up_write(&osdc->lock);
4038}
4039
4040/*
4041 * Resubmit requests pending on the given osd.
4042 */
4043static void kick_osd_requests(struct ceph_osd *osd)
4044{
4045 struct rb_node *n;
4046
a02a946d
ID		 4047 clear_backoffs(osd);
4048
922dab61 4049 for (n = rb_first(&osd->o_requests); n; ) {
5aea3dcd
ID		 4050 struct ceph_osd_request *req =
4051 rb_entry(n, struct ceph_osd_request, r_node);
4052
922dab61
ID		 4053 n = rb_next(n); /* cancel_linger_request() */
4054
5aea3dcd
ID		 4055 if (!req->r_linger) {
4056 if (!req->r_t.paused)
4057 send_request(req);
922dab61
ID		 4058 } else {
4059 cancel_linger_request(req);
5aea3dcd
ID		 4060 }
4061 }
922dab61
ID		 4062 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4063 struct ceph_osd_linger_request *lreq =
4064 rb_entry(n, struct ceph_osd_linger_request, node);
4065
4066 send_linger(lreq);
4067 }
5aea3dcd
ID		 4068}
4069
4070/*
4071 * If the osd connection drops, we need to resubmit all requests.
4072 */
4073static void osd_fault(struct ceph_connection *con)
4074{
4075 struct ceph_osd *osd = con->private;
4076 struct ceph_osd_client *osdc = osd->o_osdc;
4077
4078 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4079
4080 down_write(&osdc->lock);
4081 if (!osd_registered(osd)) {
4082 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4083 goto out_unlock;
4084 }
4085
4086 if (!reopen_osd(osd))
4087 kick_osd_requests(osd);
4088 maybe_request_map(osdc);
4089
4090out_unlock:
4091 up_write(&osdc->lock);
f24e9980
SW		 4092}
4093
a02a946d
ID		 4094struct MOSDBackoff {
4095 struct ceph_spg spgid;
4096 u32 map_epoch;
4097 u8 op;
4098 u64 id;
4099 struct ceph_hobject_id *begin;
4100 struct ceph_hobject_id *end;
4101};
4102
4103static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4104{
4105 void *p = msg->front.iov_base;
4106 void *const end = p + msg->front.iov_len;
4107 u8 struct_v;
4108 u32 struct_len;
4109 int ret;
4110
4111 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4112 if (ret)
4113 return ret;
4114
4115 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4116 if (ret)
4117 return ret;
4118
4119 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4120 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4121 ceph_decode_8_safe(&p, end, m->op, e_inval);
4122 ceph_decode_64_safe(&p, end, m->id, e_inval);
4123
4124 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4125 if (!m->begin)
4126 return -ENOMEM;
4127
4128 ret = decode_hoid(&p, end, m->begin);
4129 if (ret) {
4130 free_hoid(m->begin);
4131 return ret;
4132 }
4133
4134 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4135 if (!m->end) {
4136 free_hoid(m->begin);
4137 return -ENOMEM;
4138 }
4139
4140 ret = decode_hoid(&p, end, m->end);
4141 if (ret) {
4142 free_hoid(m->begin);
4143 free_hoid(m->end);
4144 return ret;
4145 }
4146
4147 return 0;
4148
4149e_inval:
4150 return -EINVAL;
4151}
4152
4153static struct ceph_msg *create_backoff_message(
4154 const struct ceph_osd_backoff *backoff,
4155 u32 map_epoch)
4156{
4157 struct ceph_msg *msg;
4158 void *p, *end;
4159 int msg_size;
4160
4161 msg_size = CEPH_ENCODING_START_BLK_LEN +
4162 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4163 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4164 msg_size += CEPH_ENCODING_START_BLK_LEN +
4165 hoid_encoding_size(backoff->begin);
4166 msg_size += CEPH_ENCODING_START_BLK_LEN +
4167 hoid_encoding_size(backoff->end);
4168
4169 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4170 if (!msg)
4171 return NULL;
4172
4173 p = msg->front.iov_base;
4174 end = p + msg->front_alloc_len;
4175
4176 encode_spgid(&p, &backoff->spgid);
4177 ceph_encode_32(&p, map_epoch);
4178 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4179 ceph_encode_64(&p, backoff->id);
4180 encode_hoid(&p, end, backoff->begin);
4181 encode_hoid(&p, end, backoff->end);
4182 BUG_ON(p != end);
4183
4184 msg->front.iov_len = p - msg->front.iov_base;
4185 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4186 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4187
4188 return msg;
4189}
4190
4191static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4192{
4193 struct ceph_spg_mapping *spg;
4194 struct ceph_osd_backoff *backoff;
4195 struct ceph_msg *msg;
4196
4197 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4198 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4199
4200 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4201 if (!spg) {
4202 spg = alloc_spg_mapping();
4203 if (!spg) {
4204 pr_err("%s failed to allocate spg\n", __func__);
4205 return;
4206 }
4207 spg->spgid = m->spgid; /* struct */
4208 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4209 }
4210
4211 backoff = alloc_backoff();
4212 if (!backoff) {
4213 pr_err("%s failed to allocate backoff\n", __func__);
4214 return;
4215 }
4216 backoff->spgid = m->spgid; /* struct */
4217 backoff->id = m->id;
4218 backoff->begin = m->begin;
4219 m->begin = NULL; /* backoff now owns this */
4220 backoff->end = m->end;
4221 m->end = NULL; /* ditto */
4222
4223 insert_backoff(&spg->backoffs, backoff);
4224 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4225
4226 /*
4227 * Ack with original backoff's epoch so that the OSD can
4228 * discard this if there was a PG split.
4229 */
4230 msg = create_backoff_message(backoff, m->map_epoch);
4231 if (!msg) {
4232 pr_err("%s failed to allocate msg\n", __func__);
4233 return;
4234 }
4235 ceph_con_send(&osd->o_con, msg);
4236}
4237
4238static bool target_contained_by(const struct ceph_osd_request_target *t,
4239 const struct ceph_hobject_id *begin,
4240 const struct ceph_hobject_id *end)
4241{
4242 struct ceph_hobject_id hoid;
4243 int cmp;
4244
4245 hoid_fill_from_target(&hoid, t);
4246 cmp = hoid_compare(&hoid, begin);
4247 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4248}
4249
4250static void handle_backoff_unblock(struct ceph_osd *osd,
4251 const struct MOSDBackoff *m)
4252{
4253 struct ceph_spg_mapping *spg;
4254 struct ceph_osd_backoff *backoff;
4255 struct rb_node *n;
4256
4257 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4258 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4259
4260 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4261 if (!backoff) {
4262 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4263 __func__, osd->o_osd, m->spgid.pgid.pool,
4264 m->spgid.pgid.seed, m->spgid.shard, m->id);
4265 return;
4266 }
4267
4268 if (hoid_compare(backoff->begin, m->begin) &&
4269 hoid_compare(backoff->end, m->end)) {
4270 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4271 __func__, osd->o_osd, m->spgid.pgid.pool,
4272 m->spgid.pgid.seed, m->spgid.shard, m->id);
4273 /* unblock it anyway... */
4274 }
4275
4276 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4277 BUG_ON(!spg);
4278
4279 erase_backoff(&spg->backoffs, backoff);
4280 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4281 free_backoff(backoff);
4282
4283 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4284 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4285 free_spg_mapping(spg);
4286 }
4287
4288 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4289 struct ceph_osd_request *req =
4290 rb_entry(n, struct ceph_osd_request, r_node);
4291
4292 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4293 /*
4294 * Match against @m, not @backoff -- the PG may
4295 * have split on the OSD.
4296 */
4297 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4298 /*
4299 * If no other installed backoff applies,
4300 * resend.
4301 */
4302 send_request(req);
4303 }
4304 }
4305 }
4306}
4307
4308static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4309{
4310 struct ceph_osd_client *osdc = osd->o_osdc;
4311 struct MOSDBackoff m;
4312 int ret;
4313
4314 down_read(&osdc->lock);
4315 if (!osd_registered(osd)) {
4316 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4317 up_read(&osdc->lock);
4318 return;
4319 }
4320 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4321
4322 mutex_lock(&osd->lock);
4323 ret = decode_MOSDBackoff(msg, &m);
4324 if (ret) {
4325 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4326 ceph_msg_dump(msg);
4327 goto out_unlock;
4328 }
4329
4330 switch (m.op) {
4331 case CEPH_OSD_BACKOFF_OP_BLOCK:
4332 handle_backoff_block(osd, &m);
4333 break;
4334 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4335 handle_backoff_unblock(osd, &m);
4336 break;
4337 default:
4338 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4339 }
4340
4341 free_hoid(m.begin);
4342 free_hoid(m.end);
4343
4344out_unlock:
4345 mutex_unlock(&osd->lock);
4346 up_read(&osdc->lock);
4347}
4348
a40c4f10
YS		 4349/*
4350 * Process osd watch notifications
4351 */
3c663bbd
AE		 4352static void handle_watch_notify(struct ceph_osd_client *osdc,
4353 struct ceph_msg *msg)
a40c4f10 4354{
922dab61
ID		 4355 void *p = msg->front.iov_base;
4356 void *const end = p + msg->front.iov_len;
4357 struct ceph_osd_linger_request *lreq;
4358 struct linger_work *lwork;
4359 u8 proto_ver, opcode;
4360 u64 cookie, notify_id;
4361 u64 notifier_id = 0;
19079203 4362 s32 return_code = 0;
922dab61
ID		 4363 void *payload = NULL;
4364 u32 payload_len = 0;
a40c4f10
YS		 4365
4366 ceph_decode_8_safe(&p, end, proto_ver, bad);
4367 ceph_decode_8_safe(&p, end, opcode, bad);
4368 ceph_decode_64_safe(&p, end, cookie, bad);
922dab61 4369 p += 8; /* skip ver */
a40c4f10
YS		 4370 ceph_decode_64_safe(&p, end, notify_id, bad);
4371
922dab61
ID		 4372 if (proto_ver >= 1) {
4373 ceph_decode_32_safe(&p, end, payload_len, bad);
4374 ceph_decode_need(&p, end, payload_len, bad);
4375 payload = p;
4376 p += payload_len;
4377 }
4378
4379 if (le16_to_cpu(msg->hdr.version) >= 2)
19079203 4380 ceph_decode_32_safe(&p, end, return_code, bad);
922dab61
ID		 4381
4382 if (le16_to_cpu(msg->hdr.version) >= 3)
4383 ceph_decode_64_safe(&p, end, notifier_id, bad);
4384
4385 down_read(&osdc->lock);
4386 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4387 if (!lreq) {
4388 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4389 cookie);
4390 goto out_unlock_osdc;
4391 }
4392
4393 mutex_lock(&lreq->lock);
19079203
ID		 4394 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4395 opcode, cookie, lreq, lreq->is_watch);
922dab61
ID		 4396 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4397 if (!lreq->last_error) {
4398 lreq->last_error = -ENOTCONN;
4399 queue_watch_error(lreq);
4400 }
19079203
ID		 4401 } else if (!lreq->is_watch) {
4402 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4403 if (lreq->notify_id && lreq->notify_id != notify_id) {
4404 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4405 lreq->notify_id, notify_id);
4406 } else if (!completion_done(&lreq->notify_finish_wait)) {
4407 struct ceph_msg_data *data =
0d9c1ab3 4408 msg->num_data_items ? &msg->data[0] : NULL;
19079203
ID		 4409
4410 if (data) {
4411 if (lreq->preply_pages) {
4412 WARN_ON(data->type !=
4413 CEPH_MSG_DATA_PAGES);
4414 *lreq->preply_pages = data->pages;
4415 *lreq->preply_len = data->length;
4416 } else {
4417 ceph_release_page_vector(data->pages,
4418 calc_pages_for(0, data->length));
4419 }
4420 }
4421 lreq->notify_finish_error = return_code;
4422 complete_all(&lreq->notify_finish_wait);
4423 }
922dab61
ID		 4424 } else {
4425 /* CEPH_WATCH_EVENT_NOTIFY */
4426 lwork = lwork_alloc(lreq, do_watch_notify);
4427 if (!lwork) {
4428 pr_err("failed to allocate notify-lwork\n");
4429 goto out_unlock_lreq;
a40c4f10 4430 }
a40c4f10 4431
922dab61
ID		 4432 lwork->notify.notify_id = notify_id;
4433 lwork->notify.notifier_id = notifier_id;
4434 lwork->notify.payload = payload;
4435 lwork->notify.payload_len = payload_len;
4436 lwork->notify.msg = ceph_msg_get(msg);
4437 lwork_queue(lwork);
91883cd2 4438 }
a40c4f10 4439
922dab61
ID		 4440out_unlock_lreq:
4441 mutex_unlock(&lreq->lock);
4442out_unlock_osdc:
4443 up_read(&osdc->lock);
a40c4f10
YS		 4444 return;
4445
4446bad:
4447 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 4448}
4449
70636773
AE		 4450/*
4451 * Register request, send initial attempt.
4452 */
4453int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4454 struct ceph_osd_request *req,
4455 bool nofail)
4456{
5aea3dcd
ID		 4457 down_read(&osdc->lock);
4458 submit_request(req, false);
4459 up_read(&osdc->lock);
0bbfdfe8 4460
5aea3dcd 4461 return 0;
f24e9980 4462}
3d14c5d2 4463EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 4464
c9f9b93d 4465/*
c297eb42
ID		 4466 * Unregister a registered request. The request is not completed:
4467 * ->r_result isn't set and __complete_request() isn't called.
c9f9b93d
ID		 4468 */
4469void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4470{
4471 struct ceph_osd_client *osdc = req->r_osdc;
4472
5aea3dcd 4473 down_write(&osdc->lock);
5aea3dcd
ID		 4474 if (req->r_osd)
4475 cancel_request(req);
4476 up_write(&osdc->lock);
c9f9b93d
ID		 4477}
4478EXPORT_SYMBOL(ceph_osdc_cancel_request);
4479
f24e9980 4480/*
42b06965 4481 * @timeout: in jiffies, 0 means "wait forever"
f24e9980 4482 */
42b06965
ID		 4483static int wait_request_timeout(struct ceph_osd_request *req,
4484 unsigned long timeout)
f24e9980 4485{
42b06965 4486 long left;
c9f9b93d 4487
42b06965 4488 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
0e76abf2 4489 left = wait_for_completion_killable_timeout(&req->r_completion,
42b06965
ID		 4490 ceph_timeout_jiffies(timeout));
4491 if (left <= 0) {
4492 left = left ?: -ETIMEDOUT;
c9f9b93d 4493 ceph_osdc_cancel_request(req);
42b06965
ID		 4494 } else {
4495 left = req->r_result; /* completed */
f24e9980
SW		 4496 }
4497
42b06965
ID		 4498 return left;
4499}
4500
4501/*
4502 * wait for a request to complete
4503 */
4504int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4505 struct ceph_osd_request *req)
4506{
4507 return wait_request_timeout(req, 0);
f24e9980 4508}
3d14c5d2 4509EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 4510
4511/*
4512 * sync - wait for all in-flight requests to flush. avoid starvation.
4513 */
4514void ceph_osdc_sync(struct ceph_osd_client *osdc)
4515{
5aea3dcd
ID		 4516 struct rb_node *n, *p;
4517 u64 last_tid = atomic64_read(&osdc->last_tid);
f24e9980 4518
5aea3dcd
ID		 4519again:
4520 down_read(&osdc->lock);
4521 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4522 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4523
4524 mutex_lock(&osd->lock);
4525 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4526 struct ceph_osd_request *req =
4527 rb_entry(p, struct ceph_osd_request, r_node);
4528
4529 if (req->r_tid > last_tid)
4530 break;
4531
4532 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4533 continue;
f24e9980 4534
5aea3dcd
ID		 4535 ceph_osdc_get_request(req);
4536 mutex_unlock(&osd->lock);
4537 up_read(&osdc->lock);
4538 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4539 __func__, req, req->r_tid, last_tid);
b18b9550 4540 wait_for_completion(&req->r_completion);
5aea3dcd
ID		 4541 ceph_osdc_put_request(req);
4542 goto again;
4543 }
f24e9980 4544
5aea3dcd 4545 mutex_unlock(&osd->lock);
f24e9980 4546 }
5aea3dcd
ID		 4547
4548 up_read(&osdc->lock);
4549 dout("%s done last_tid %llu\n", __func__, last_tid);
f24e9980 4550}
3d14c5d2 4551EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 4552
922dab61
ID		 4553static struct ceph_osd_request *
4554alloc_linger_request(struct ceph_osd_linger_request *lreq)
4555{
4556 struct ceph_osd_request *req;
4557
4558 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4559 if (!req)
4560 return NULL;
4561
4562 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4563 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
922dab61
ID		 4564 return req;
4565}
4566
39e58c34
ID		 4567static struct ceph_osd_request *
4568alloc_watch_request(struct ceph_osd_linger_request *lreq, u8 watch_opcode)
4569{
4570 struct ceph_osd_request *req;
4571
4572 req = alloc_linger_request(lreq);
4573 if (!req)
4574 return NULL;
4575
4576 /*
4577 * Pass 0 for cookie because we don't know it yet, it will be
4578 * filled in by linger_submit().
4579 */
4580 osd_req_op_watch_init(req, 0, 0, watch_opcode);
26f887e0
ID		 4581
4582 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4583 ceph_osdc_put_request(req);
4584 return NULL;
4585 }
4586
39e58c34
ID		 4587 return req;
4588}
4589
922dab61
ID		 4590/*
4591 * Returns a handle, caller owns a ref.
4592 */
4593struct ceph_osd_linger_request *
4594ceph_osdc_watch(struct ceph_osd_client *osdc,
4595 struct ceph_object_id *oid,
4596 struct ceph_object_locator *oloc,
4597 rados_watchcb2_t wcb,
4598 rados_watcherrcb_t errcb,
4599 void *data)
4600{
4601 struct ceph_osd_linger_request *lreq;
4602 int ret;
4603
4604 lreq = linger_alloc(osdc);
4605 if (!lreq)
4606 return ERR_PTR(-ENOMEM);
4607
19079203 4608 lreq->is_watch = true;
922dab61
ID		 4609 lreq->wcb = wcb;
4610 lreq->errcb = errcb;
4611 lreq->data = data;
b07d3c4b 4612 lreq->watch_valid_thru = jiffies;
922dab61
ID		 4613
4614 ceph_oid_copy(&lreq->t.base_oid, oid);
4615 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
54ea0046 4616 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
fac02ddf 4617 ktime_get_real_ts64(&lreq->mtime);
922dab61 4618
39e58c34 4619 lreq->reg_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 4620 if (!lreq->reg_req) {
4621 ret = -ENOMEM;
4622 goto err_put_lreq;
4623 }
4624
39e58c34 4625 lreq->ping_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_PING);
922dab61
ID		 4626 if (!lreq->ping_req) {
4627 ret = -ENOMEM;
4628 goto err_put_lreq;
4629 }
4630
81c65213 4631 linger_submit(lreq);
922dab61
ID		 4632 ret = linger_reg_commit_wait(lreq);
4633 if (ret) {
4634 linger_cancel(lreq);
4635 goto err_put_lreq;
4636 }
4637
4638 return lreq;
4639
4640err_put_lreq:
4641 linger_put(lreq);
4642 return ERR_PTR(ret);
4643}
4644EXPORT_SYMBOL(ceph_osdc_watch);
4645
4646/*
4647 * Releases a ref.
4648 *
4649 * Times out after mount_timeout to preserve rbd unmap behaviour
4650 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4651 * with mount_timeout").
4652 */
4653int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4654 struct ceph_osd_linger_request *lreq)
4655{
4656 struct ceph_options *opts = osdc->client->options;
4657 struct ceph_osd_request *req;
4658 int ret;
4659
4660 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4661 if (!req)
4662 return -ENOMEM;
4663
4664 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4665 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
54ea0046 4666 req->r_flags = CEPH_OSD_FLAG_WRITE;
fac02ddf 4667 ktime_get_real_ts64(&req->r_mtime);
922dab61
ID		 4668 osd_req_op_watch_init(req, 0, lreq->linger_id,
4669 CEPH_OSD_WATCH_OP_UNWATCH);
4670
4671 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4672 if (ret)
4673 goto out_put_req;
4674
4675 ceph_osdc_start_request(osdc, req, false);
4676 linger_cancel(lreq);
4677 linger_put(lreq);
4678 ret = wait_request_timeout(req, opts->mount_timeout);
4679
4680out_put_req:
4681 ceph_osdc_put_request(req);
4682 return ret;
4683}
4684EXPORT_SYMBOL(ceph_osdc_unwatch);
4685
4686static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4687 u64 notify_id, u64 cookie, void *payload,
6d54228f 4688 u32 payload_len)
922dab61
ID		 4689{
4690 struct ceph_osd_req_op *op;
4691 struct ceph_pagelist *pl;
4692 int ret;
4693
4694 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4695
33165d47 4696 pl = ceph_pagelist_alloc(GFP_NOIO);
922dab61
ID		 4697 if (!pl)
4698 return -ENOMEM;
4699
922dab61
ID		 4700 ret = ceph_pagelist_encode_64(pl, notify_id);
4701 ret |= ceph_pagelist_encode_64(pl, cookie);
4702 if (payload) {
4703 ret |= ceph_pagelist_encode_32(pl, payload_len);
4704 ret |= ceph_pagelist_append(pl, payload, payload_len);
4705 } else {
4706 ret |= ceph_pagelist_encode_32(pl, 0);
4707 }
4708 if (ret) {
4709 ceph_pagelist_release(pl);
4710 return -ENOMEM;
4711 }
4712
4713 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4714 op->indata_len = pl->length;
4715 return 0;
4716}
4717
4718int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4719 struct ceph_object_id *oid,
4720 struct ceph_object_locator *oloc,
4721 u64 notify_id,
4722 u64 cookie,
4723 void *payload,
6d54228f 4724 u32 payload_len)
922dab61
ID		 4725{
4726 struct ceph_osd_request *req;
4727 int ret;
4728
4729 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4730 if (!req)
4731 return -ENOMEM;
4732
4733 ceph_oid_copy(&req->r_base_oid, oid);
4734 ceph_oloc_copy(&req->r_base_oloc, oloc);
4735 req->r_flags = CEPH_OSD_FLAG_READ;
4736
26f887e0
ID		 4737 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4738 payload_len);
922dab61
ID		 4739 if (ret)
4740 goto out_put_req;
4741
26f887e0 4742 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
922dab61
ID		 4743 if (ret)
4744 goto out_put_req;
4745
4746 ceph_osdc_start_request(osdc, req, false);
4747 ret = ceph_osdc_wait_request(osdc, req);
4748
4749out_put_req:
4750 ceph_osdc_put_request(req);
4751 return ret;
4752}
4753EXPORT_SYMBOL(ceph_osdc_notify_ack);
4754
19079203
ID		 4755static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4756 u64 cookie, u32 prot_ver, u32 timeout,
6d54228f 4757 void *payload, u32 payload_len)
19079203
ID		 4758{
4759 struct ceph_osd_req_op *op;
4760 struct ceph_pagelist *pl;
4761 int ret;
4762
4763 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4764 op->notify.cookie = cookie;
4765
33165d47 4766 pl = ceph_pagelist_alloc(GFP_NOIO);
19079203
ID		 4767 if (!pl)
4768 return -ENOMEM;
4769
19079203
ID		 4770 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4771 ret |= ceph_pagelist_encode_32(pl, timeout);
4772 ret |= ceph_pagelist_encode_32(pl, payload_len);
4773 ret |= ceph_pagelist_append(pl, payload, payload_len);
4774 if (ret) {
4775 ceph_pagelist_release(pl);
4776 return -ENOMEM;
4777 }
4778
4779 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4780 op->indata_len = pl->length;
4781 return 0;
4782}
4783
4784/*
4785 * @timeout: in seconds
4786 *
4787 * @preply_{pages,len} are initialized both on success and error.
4788 * The caller is responsible for:
4789 *
4790 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4791 */
4792int ceph_osdc_notify(struct ceph_osd_client *osdc,
4793 struct ceph_object_id *oid,
4794 struct ceph_object_locator *oloc,
4795 void *payload,
6d54228f 4796 u32 payload_len,
19079203
ID		 4797 u32 timeout,
4798 struct page ***preply_pages,
4799 size_t *preply_len)
4800{
4801 struct ceph_osd_linger_request *lreq;
4802 struct page **pages;
4803 int ret;
4804
4805 WARN_ON(!timeout);
4806 if (preply_pages) {
4807 *preply_pages = NULL;
4808 *preply_len = 0;
4809 }
4810
4811 lreq = linger_alloc(osdc);
4812 if (!lreq)
4813 return -ENOMEM;
4814
4815 lreq->preply_pages = preply_pages;
4816 lreq->preply_len = preply_len;
4817
4818 ceph_oid_copy(&lreq->t.base_oid, oid);
4819 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4820 lreq->t.flags = CEPH_OSD_FLAG_READ;
4821
4822 lreq->reg_req = alloc_linger_request(lreq);
4823 if (!lreq->reg_req) {
4824 ret = -ENOMEM;
4825 goto out_put_lreq;
4826 }
4827
81c65213
ID		 4828 /*
4829 * Pass 0 for cookie because we don't know it yet, it will be
4830 * filled in by linger_submit().
4831 */
4832 ret = osd_req_op_notify_init(lreq->reg_req, 0, 0, 1, timeout,
4833 payload, payload_len);
4834 if (ret)
4835 goto out_put_lreq;
4836
19079203
ID		 4837 /* for notify_id */
4838 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4839 if (IS_ERR(pages)) {
4840 ret = PTR_ERR(pages);
4841 goto out_put_lreq;
4842 }
19079203
ID		 4843 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4844 response_data),
4845 pages, PAGE_SIZE, 0, false, true);
19079203 4846
26f887e0
ID		 4847 ret = ceph_osdc_alloc_messages(lreq->reg_req, GFP_NOIO);
4848 if (ret)
4849 goto out_put_lreq;
4850
81c65213 4851 linger_submit(lreq);
19079203
ID		 4852 ret = linger_reg_commit_wait(lreq);
4853 if (!ret)
4854 ret = linger_notify_finish_wait(lreq);
4855 else
4856 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4857
4858 linger_cancel(lreq);
4859out_put_lreq:
4860 linger_put(lreq);
4861 return ret;
4862}
4863EXPORT_SYMBOL(ceph_osdc_notify);
4864
b07d3c4b
ID		 4865/*
4866 * Return the number of milliseconds since the watch was last
4867 * confirmed, or an error. If there is an error, the watch is no
4868 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4869 */
4870int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4871 struct ceph_osd_linger_request *lreq)
4872{
4873 unsigned long stamp, age;
4874 int ret;
4875
4876 down_read(&osdc->lock);
4877 mutex_lock(&lreq->lock);
4878 stamp = lreq->watch_valid_thru;
4879 if (!list_empty(&lreq->pending_lworks)) {
4880 struct linger_work *lwork =
4881 list_first_entry(&lreq->pending_lworks,
4882 struct linger_work,
4883 pending_item);
4884
4885 if (time_before(lwork->queued_stamp, stamp))
4886 stamp = lwork->queued_stamp;
4887 }
4888 age = jiffies - stamp;
4889 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4890 lreq, lreq->linger_id, age, lreq->last_error);
4891 /* we are truncating to msecs, so return a safe upper bound */
4892 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4893
4894 mutex_unlock(&lreq->lock);
4895 up_read(&osdc->lock);
4896 return ret;
4897}
4898
a4ed38d7
DF		 4899static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4900{
4901 u8 struct_v;
4902 u32 struct_len;
4903 int ret;
4904
4905 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4906 &struct_v, &struct_len);
4907 if (ret)
51fc7ab4
JL		 4908 goto bad;
4909
4910 ret = -EINVAL;
4911 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
4912 ceph_decode_64_safe(p, end, item->cookie, bad);
4913 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
a4ed38d7 4914
a4ed38d7 4915 if (struct_v >= 2) {
51fc7ab4
JL		 4916 ret = ceph_decode_entity_addr(p, end, &item->addr);
4917 if (ret)
4918 goto bad;
4919 } else {
4920 ret = 0;
a4ed38d7
DF		 4921 }
4922
4923 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4924 ENTITY_NAME(item->name), item->cookie,
b726ec97 4925 ceph_pr_addr(&item->addr));
51fc7ab4
JL		 4926bad:
4927 return ret;
a4ed38d7
DF		 4928}
4929
4930static int decode_watchers(void **p, void *end,
4931 struct ceph_watch_item **watchers,
4932 u32 *num_watchers)
4933{
4934 u8 struct_v;
4935 u32 struct_len;
4936 int i;
4937 int ret;
4938
4939 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4940 &struct_v, &struct_len);
4941 if (ret)
4942 return ret;
4943
4944 *num_watchers = ceph_decode_32(p);
4945 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4946 if (!*watchers)
4947 return -ENOMEM;
4948
4949 for (i = 0; i < *num_watchers; i++) {
4950 ret = decode_watcher(p, end, *watchers + i);
4951 if (ret) {
4952 kfree(*watchers);
4953 return ret;
4954 }
4955 }
4956
4957 return 0;
4958}
4959
4960/*
4961 * On success, the caller is responsible for:
4962 *
4963 * kfree(watchers);
4964 */
4965int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
4966 struct ceph_object_id *oid,
4967 struct ceph_object_locator *oloc,
4968 struct ceph_watch_item **watchers,
4969 u32 *num_watchers)
4970{
4971 struct ceph_osd_request *req;
4972 struct page **pages;
4973 int ret;
4974
4975 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4976 if (!req)
4977 return -ENOMEM;
4978
4979 ceph_oid_copy(&req->r_base_oid, oid);
4980 ceph_oloc_copy(&req->r_base_oloc, oloc);
4981 req->r_flags = CEPH_OSD_FLAG_READ;
4982
a4ed38d7
DF		 4983 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4984 if (IS_ERR(pages)) {
4985 ret = PTR_ERR(pages);
4986 goto out_put_req;
4987 }
4988
4989 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
4990 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
4991 response_data),
4992 pages, PAGE_SIZE, 0, false, true);
4993
26f887e0
ID		 4994 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4995 if (ret)
4996 goto out_put_req;
4997
a4ed38d7
DF		 4998 ceph_osdc_start_request(osdc, req, false);
4999 ret = ceph_osdc_wait_request(osdc, req);
5000 if (ret >= 0) {
5001 void *p = page_address(pages[0]);
5002 void *const end = p + req->r_ops[0].outdata_len;
5003
5004 ret = decode_watchers(&p, end, watchers, num_watchers);
5005 }
5006
5007out_put_req:
5008 ceph_osdc_put_request(req);
5009 return ret;
5010}
5011EXPORT_SYMBOL(ceph_osdc_list_watchers);
5012
dd935f44
JD		 5013/*
5014 * Call all pending notify callbacks - for use after a watch is
5015 * unregistered, to make sure no more callbacks for it will be invoked
5016 */
f6479449 5017void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44 5018{
99d16943 5019 dout("%s osdc %p\n", __func__, osdc);
dd935f44
JD		 5020 flush_workqueue(osdc->notify_wq);
5021}
5022EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5023
7cca78c9
ID		 5024void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5025{
5026 down_read(&osdc->lock);
5027 maybe_request_map(osdc);
5028 up_read(&osdc->lock);
5029}
5030EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
dd935f44 5031
428a7158
DF		 5032/*
5033 * Execute an OSD class method on an object.
5034 *
5035 * @flags: CEPH_OSD_FLAG_*
2544a020 5036 * @resp_len: in/out param for reply length
428a7158
DF		 5037 */
5038int ceph_osdc_call(struct ceph_osd_client *osdc,
5039 struct ceph_object_id *oid,
5040 struct ceph_object_locator *oloc,
5041 const char *class, const char *method,
5042 unsigned int flags,
5043 struct page *req_page, size_t req_len,
68ada915 5044 struct page **resp_pages, size_t *resp_len)
428a7158
DF		 5045{
5046 struct ceph_osd_request *req;
5047 int ret;
5048
68ada915 5049 if (req_len > PAGE_SIZE)
2544a020
ID		 5050 return -E2BIG;
5051
428a7158
DF		 5052 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5053 if (!req)
5054 return -ENOMEM;
5055
5056 ceph_oid_copy(&req->r_base_oid, oid);
5057 ceph_oloc_copy(&req->r_base_oloc, oloc);
5058 req->r_flags = flags;
5059
24639ce5 5060 ret = osd_req_op_cls_init(req, 0, class, method);
fe943d50
CX		 5061 if (ret)
5062 goto out_put_req;
5063
428a7158
DF		 5064 if (req_page)
5065 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5066 0, false, false);
68ada915
ID		 5067 if (resp_pages)
5068 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
2544a020 5069 *resp_len, 0, false, false);
428a7158 5070
26f887e0
ID		 5071 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5072 if (ret)
5073 goto out_put_req;
5074
428a7158
DF		 5075 ceph_osdc_start_request(osdc, req, false);
5076 ret = ceph_osdc_wait_request(osdc, req);
5077 if (ret >= 0) {
5078 ret = req->r_ops[0].rval;
68ada915 5079 if (resp_pages)
428a7158
DF		 5080 *resp_len = req->r_ops[0].outdata_len;
5081 }
5082
5083out_put_req:
5084 ceph_osdc_put_request(req);
5085 return ret;
5086}
5087EXPORT_SYMBOL(ceph_osdc_call);
5088
f24e9980
SW		 5089/*
5090 * init, shutdown
5091 */
5092int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5093{
5094 int err;
5095
5096 dout("init\n");
5097 osdc->client = client;
5aea3dcd 5098 init_rwsem(&osdc->lock);
f24e9980 5099 osdc->osds = RB_ROOT;
f5a2041b 5100 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 5101 spin_lock_init(&osdc->osd_lru_lock);
5aea3dcd
ID		 5102 osd_init(&osdc->homeless_osd);
5103 osdc->homeless_osd.o_osdc = osdc;
5104 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
264048af 5105 osdc->last_linger_id = CEPH_LINGER_ID_START;
922dab61 5106 osdc->linger_requests = RB_ROOT;
4609245e
ID		 5107 osdc->map_checks = RB_ROOT;
5108 osdc->linger_map_checks = RB_ROOT;
f24e9980 5109 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b
YS		 5110 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5111
5f44f142 5112 err = -ENOMEM;
e5253a7b
ID		 5113 osdc->osdmap = ceph_osdmap_alloc();
5114 if (!osdc->osdmap)
5115 goto out;
5116
9e767adb
ID		 5117 osdc->req_mempool = mempool_create_slab_pool(10,
5118 ceph_osd_request_cache);
f24e9980 5119 if (!osdc->req_mempool)
e5253a7b 5120 goto out_map;
f24e9980 5121
d50b409f 5122 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
0d9c1ab3 5123 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
f24e9980 5124 if (err < 0)
5f44f142 5125 goto out_mempool;
d50b409f 5126 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
0d9c1ab3
ID		 5127 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5128 "osd_op_reply");
c16e7869
SW		 5129 if (err < 0)
5130 goto out_msgpool;
a40c4f10 5131
dbcae088 5132 err = -ENOMEM;
a40c4f10 5133 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 5134 if (!osdc->notify_wq)
c172ec5c
ID		 5135 goto out_msgpool_reply;
5136
88bc1922
ID		 5137 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5138 if (!osdc->completion_wq)
5139 goto out_notify_wq;
5140
fbca9635
ID		 5141 schedule_delayed_work(&osdc->timeout_work,
5142 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 5143 schedule_delayed_work(&osdc->osds_timeout_work,
5144 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5145
f24e9980 5146 return 0;
5f44f142 5147
88bc1922
ID		 5148out_notify_wq:
5149 destroy_workqueue(osdc->notify_wq);
c172ec5c
ID		 5150out_msgpool_reply:
5151 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 5152out_msgpool:
5153 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 5154out_mempool:
5155 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 5156out_map:
5157 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 5158out:
5159 return err;
f24e9980
SW		 5160}
5161
5162void ceph_osdc_stop(struct ceph_osd_client *osdc)
5163{
88bc1922 5164 destroy_workqueue(osdc->completion_wq);
a40c4f10 5165 destroy_workqueue(osdc->notify_wq);
f24e9980 5166 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 5167 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f 5168
5aea3dcd 5169 down_write(&osdc->lock);
42a2c09f
ID		 5170 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5171 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5172 struct ceph_osd, o_node);
5aea3dcd 5173 close_osd(osd);
42a2c09f 5174 }
5aea3dcd 5175 up_write(&osdc->lock);
02113a0f 5176 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5aea3dcd
ID		 5177 osd_cleanup(&osdc->homeless_osd);
5178
5179 WARN_ON(!list_empty(&osdc->osd_lru));
922dab61 5180 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4609245e
ID		 5181 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5182 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5aea3dcd
ID		 5183 WARN_ON(atomic_read(&osdc->num_requests));
5184 WARN_ON(atomic_read(&osdc->num_homeless));
42a2c09f 5185
e5253a7b 5186 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 5187 mempool_destroy(osdc->req_mempool);
5188 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 5189 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 5190}
5191
5192/*
5193 * Read some contiguous pages. If we cross a stripe boundary, shorten
5194 * *plen. Return number of bytes read, or error.
5195 */
5196int ceph_osdc_readpages(struct ceph_osd_client *osdc,
5197 struct ceph_vino vino, struct ceph_file_layout *layout,
5198 u64 off, u64 *plen,
5199 u32 truncate_seq, u64 truncate_size,
b7495fc2 5200 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 5201{
5202 struct ceph_osd_request *req;
5203 int rc = 0;
5204
5205 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
5206 vino.snap, off, *plen);
715e4cd4 5207 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 5208 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 5209 NULL, truncate_seq, truncate_size,
153e5167 5210 false);
6816282d
SW		 5211 if (IS_ERR(req))
5212 return PTR_ERR(req);
f24e9980
SW		 5213
5214 /* it may be a short read due to an object boundary */
406e2c9f 5215 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 5216 pages, *plen, page_align, false, false);
f24e9980 5217
e0c59487 5218 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 5219 off, *plen, *plen, page_align);
f24e9980
SW		 5220
5221 rc = ceph_osdc_start_request(osdc, req, false);
5222 if (!rc)
5223 rc = ceph_osdc_wait_request(osdc, req);
5224
5225 ceph_osdc_put_request(req);
5226 dout("readpages result %d\n", rc);
5227 return rc;
5228}
3d14c5d2 5229EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 5230
5231/*
5232 * do a synchronous write on N pages
5233 */
5234int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
5235 struct ceph_file_layout *layout,
5236 struct ceph_snap_context *snapc,
5237 u64 off, u64 len,
5238 u32 truncate_seq, u64 truncate_size,
fac02ddf 5239 struct timespec64 *mtime,
24808826 5240 struct page **pages, int num_pages)
f24e9980
SW		 5241{
5242 struct ceph_osd_request *req;
5243 int rc = 0;
b7495fc2 5244 int page_align = off & ~PAGE_MASK;
f24e9980 5245
715e4cd4 5246 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
54ea0046 5247 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
acead002 5248 snapc, truncate_seq, truncate_size,
153e5167 5249 true);
6816282d
SW		 5250 if (IS_ERR(req))
5251 return PTR_ERR(req);
f24e9980
SW		 5252
5253 /* it may be a short write due to an object boundary */
406e2c9f 5254 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 5255 false, false);
5256 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 5257
bb873b53 5258 req->r_mtime = *mtime;
87f979d3 5259 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 5260 if (!rc)
5261 rc = ceph_osdc_wait_request(osdc, req);
5262
5263 ceph_osdc_put_request(req);
5264 if (rc == 0)
5265 rc = len;
5266 dout("writepages result %d\n", rc);
5267 return rc;
5268}
3d14c5d2 5269EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 5270
23ddf9be
LH		 5271static int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5272 u64 src_snapid, u64 src_version,
5273 struct ceph_object_id *src_oid,
5274 struct ceph_object_locator *src_oloc,
5275 u32 src_fadvise_flags,
5276 u32 dst_fadvise_flags,
5277 u8 copy_from_flags)
5278{
5279 struct ceph_osd_req_op *op;
5280 struct page **pages;
5281 void *p, *end;
5282
5283 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5284 if (IS_ERR(pages))
5285 return PTR_ERR(pages);
5286
5287 op = _osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM, dst_fadvise_flags);
5288 op->copy_from.snapid = src_snapid;
5289 op->copy_from.src_version = src_version;
5290 op->copy_from.flags = copy_from_flags;
5291 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5292
5293 p = page_address(pages[0]);
5294 end = p + PAGE_SIZE;
5295 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5296 encode_oloc(&p, end, src_oloc);
5297 op->indata_len = PAGE_SIZE - (end - p);
5298
5299 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5300 op->indata_len, 0, false, true);
5301 return 0;
5302}
5303
5304int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
5305 u64 src_snapid, u64 src_version,
5306 struct ceph_object_id *src_oid,
5307 struct ceph_object_locator *src_oloc,
5308 u32 src_fadvise_flags,
5309 struct ceph_object_id *dst_oid,
5310 struct ceph_object_locator *dst_oloc,
5311 u32 dst_fadvise_flags,
5312 u8 copy_from_flags)
5313{
5314 struct ceph_osd_request *req;
5315 int ret;
5316
5317 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL);
5318 if (!req)
5319 return -ENOMEM;
5320
5321 req->r_flags = CEPH_OSD_FLAG_WRITE;
5322
5323 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
5324 ceph_oid_copy(&req->r_t.base_oid, dst_oid);
5325
5326 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid,
5327 src_oloc, src_fadvise_flags,
5328 dst_fadvise_flags, copy_from_flags);
5329 if (ret)
5330 goto out;
5331
5332 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL);
5333 if (ret)
5334 goto out;
5335
5336 ceph_osdc_start_request(osdc, req, false);
5337 ret = ceph_osdc_wait_request(osdc, req);
5338
5339out:
5340 ceph_osdc_put_request(req);
5341 return ret;
5342}
5343EXPORT_SYMBOL(ceph_osdc_copy_from);
5344
57a35dfb 5345int __init ceph_osdc_setup(void)
5522ae0b 5346{
3f1af42a
ID		 5347 size_t size = sizeof(struct ceph_osd_request) +
5348 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5349
5522ae0b 5350 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 5351 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5352 0, 0, NULL);
5522ae0b
AE		 5353
5354 return ceph_osd_request_cache ? 0 : -ENOMEM;
5355}
5522ae0b
AE		 5356
5357void ceph_osdc_cleanup(void)
5358{
5359 BUG_ON(!ceph_osd_request_cache);
5360 kmem_cache_destroy(ceph_osd_request_cache);
5361 ceph_osd_request_cache = NULL;
5362}
5522ae0b 5363
f24e9980
SW		 5364/*
5365 * handle incoming message
5366 */
5367static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5368{
5369 struct ceph_osd *osd = con->private;
5aea3dcd 5370 struct ceph_osd_client *osdc = osd->o_osdc;
f24e9980
SW		 5371 int type = le16_to_cpu(msg->hdr.type);
5372
f24e9980
SW		 5373 switch (type) {
5374 case CEPH_MSG_OSD_MAP:
5375 ceph_osdc_handle_map(osdc, msg);
5376 break;
5377 case CEPH_MSG_OSD_OPREPLY:
5aea3dcd 5378 handle_reply(osd, msg);
f24e9980 5379 break;
a02a946d
ID		 5380 case CEPH_MSG_OSD_BACKOFF:
5381 handle_backoff(osd, msg);
5382 break;
a40c4f10
YS		 5383 case CEPH_MSG_WATCH_NOTIFY:
5384 handle_watch_notify(osdc, msg);
5385 break;
f24e9980
SW		 5386
5387 default:
5388 pr_err("received unknown message type %d %s\n", type,
5389 ceph_msg_type_name(type));
5390 }
5aea3dcd 5391
f24e9980
SW		 5392 ceph_msg_put(msg);
5393}
5394
5b3a4db3 5395/*
d15f9d69
ID		 5396 * Lookup and return message for incoming reply. Don't try to do
5397 * anything about a larger than preallocated data portion of the
5398 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 5399 */
5400static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 5401 struct ceph_msg_header *hdr,
5402 int *skip)
f24e9980
SW		 5403{
5404 struct ceph_osd *osd = con->private;
5405 struct ceph_osd_client *osdc = osd->o_osdc;
5aea3dcd 5406 struct ceph_msg *m = NULL;
0547a9b3 5407 struct ceph_osd_request *req;
3f0a4ac5 5408 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 5409 int data_len = le32_to_cpu(hdr->data_len);
5aea3dcd 5410 u64 tid = le64_to_cpu(hdr->tid);
f24e9980 5411
5aea3dcd
ID		 5412 down_read(&osdc->lock);
5413 if (!osd_registered(osd)) {
5414 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5415 *skip = 1;
5416 goto out_unlock_osdc;
5417 }
5418 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5419
5420 mutex_lock(&osd->lock);
5421 req = lookup_request(&osd->o_requests, tid);
0547a9b3 5422 if (!req) {
cd8140c6
ID		 5423 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5424 osd->o_osd, tid);
d15f9d69 5425 *skip = 1;
5aea3dcd 5426 goto out_unlock_session;
0547a9b3 5427 }
c16e7869 5428
ace6d3a9 5429 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 5430
f2be82b0 5431 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 5432 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5433 __func__, osd->o_osd, req->r_tid, front_len,
5434 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 5435 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5436 false);
a79832f2 5437 if (!m)
5aea3dcd 5438 goto out_unlock_session;
c16e7869
SW		 5439 ceph_msg_put(req->r_reply);
5440 req->r_reply = m;
5441 }
0fff87ec 5442
d15f9d69
ID		 5443 if (data_len > req->r_reply->data_length) {
5444 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5445 __func__, osd->o_osd, req->r_tid, data_len,
5446 req->r_reply->data_length);
5447 m = NULL;
5448 *skip = 1;
5aea3dcd 5449 goto out_unlock_session;
0547a9b3 5450 }
d15f9d69
ID		 5451
5452 m = ceph_msg_get(req->r_reply);
c16e7869 5453 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3 5454
5aea3dcd
ID		 5455out_unlock_session:
5456 mutex_unlock(&osd->lock);
5457out_unlock_osdc:
5458 up_read(&osdc->lock);
2450418c 5459 return m;
5b3a4db3
SW		 5460}
5461
19079203
ID		 5462/*
5463 * TODO: switch to a msg-owned pagelist
5464 */
5465static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5466{
5467 struct ceph_msg *m;
5468 int type = le16_to_cpu(hdr->type);
5469 u32 front_len = le32_to_cpu(hdr->front_len);
5470 u32 data_len = le32_to_cpu(hdr->data_len);
5471
0d9c1ab3 5472 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
19079203
ID		 5473 if (!m)
5474 return NULL;
5475
5476 if (data_len) {
5477 struct page **pages;
5478 struct ceph_osd_data osd_data;
5479
5480 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5481 GFP_NOIO);
c22e853a 5482 if (IS_ERR(pages)) {
19079203
ID		 5483 ceph_msg_put(m);
5484 return NULL;
5485 }
5486
5487 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
5488 false);
5489 ceph_osdc_msg_data_add(m, &osd_data);
5490 }
5491
5492 return m;
5493}
5494
5b3a4db3
SW		 5495static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5496 struct ceph_msg_header *hdr,
5497 int *skip)
5498{
5499 struct ceph_osd *osd = con->private;
5500 int type = le16_to_cpu(hdr->type);
5b3a4db3 5501
1c20f2d2 5502 *skip = 0;
5b3a4db3
SW		 5503 switch (type) {
5504 case CEPH_MSG_OSD_MAP:
a02a946d 5505 case CEPH_MSG_OSD_BACKOFF:
a40c4f10 5506 case CEPH_MSG_WATCH_NOTIFY:
19079203 5507 return alloc_msg_with_page_vector(hdr);
5b3a4db3
SW		 5508 case CEPH_MSG_OSD_OPREPLY:
5509 return get_reply(con, hdr, skip);
5510 default:
5aea3dcd
ID		 5511 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5512 osd->o_osd, type);
5b3a4db3
SW		 5513 *skip = 1;
5514 return NULL;
5515 }
f24e9980
SW		 5516}
5517
5518/*
5519 * Wrappers to refcount containing ceph_osd struct
5520 */
5521static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5522{
5523 struct ceph_osd *osd = con->private;
5524 if (get_osd(osd))
5525 return con;
5526 return NULL;
5527}
5528
5529static void put_osd_con(struct ceph_connection *con)
5530{
5531 struct ceph_osd *osd = con->private;
5532 put_osd(osd);
5533}
5534
4e7a5dcd
SW		 5535/*
5536 * authentication
5537 */
a3530df3
AE		 5538/*
5539 * Note: returned pointer is the address of a structure that's
5540 * managed separately. Caller must *not* attempt to free it.
5541 */
5542static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 5543 int *proto, int force_new)
4e7a5dcd
SW		 5544{
5545 struct ceph_osd *o = con->private;
5546 struct ceph_osd_client *osdc = o->o_osdc;
5547 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 5548 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 5549
74f1869f 5550 if (force_new && auth->authorizer) {
6c1ea260 5551 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 5552 auth->authorizer = NULL;
5553 }
27859f97
SW		 5554 if (!auth->authorizer) {
5555 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5556 auth);
4e7a5dcd 5557 if (ret)
a3530df3 5558 return ERR_PTR(ret);
27859f97
SW		 5559 } else {
5560 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 5561 auth);
5562 if (ret)
5563 return ERR_PTR(ret);
4e7a5dcd 5564 }
4e7a5dcd 5565 *proto = ac->protocol;
74f1869f 5566
a3530df3 5567 return auth;
4e7a5dcd
SW		 5568}
5569
6daca13d
ID		 5570static int add_authorizer_challenge(struct ceph_connection *con,
5571 void *challenge_buf, int challenge_buf_len)
5572{
5573 struct ceph_osd *o = con->private;
5574 struct ceph_osd_client *osdc = o->o_osdc;
5575 struct ceph_auth_client *ac = osdc->client->monc.auth;
5576
5577 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5578 challenge_buf, challenge_buf_len);
5579}
4e7a5dcd 5580
0dde5848 5581static int verify_authorizer_reply(struct ceph_connection *con)
4e7a5dcd
SW		 5582{
5583 struct ceph_osd *o = con->private;
5584 struct ceph_osd_client *osdc = o->o_osdc;
5585 struct ceph_auth_client *ac = osdc->client->monc.auth;
5586
0dde5848 5587 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
4e7a5dcd
SW		 5588}
5589
9bd2e6f8
SW		 5590static int invalidate_authorizer(struct ceph_connection *con)
5591{
5592 struct ceph_osd *o = con->private;
5593 struct ceph_osd_client *osdc = o->o_osdc;
5594 struct ceph_auth_client *ac = osdc->client->monc.auth;
5595
27859f97 5596 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 5597 return ceph_monc_validate_auth(&osdc->client->monc);
5598}
4e7a5dcd 5599
8cb441c0
ID		 5600static void osd_reencode_message(struct ceph_msg *msg)
5601{
914902af
ID		 5602 int type = le16_to_cpu(msg->hdr.type);
5603
5604 if (type == CEPH_MSG_OSD_OP)
5605 encode_request_finish(msg);
8cb441c0
ID		 5606}
5607
79dbd1ba 5608static int osd_sign_message(struct ceph_msg *msg)
33d07337 5609{
79dbd1ba 5610 struct ceph_osd *o = msg->con->private;
33d07337 5611 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5612
33d07337
YZ		 5613 return ceph_auth_sign_message(auth, msg);
5614}
5615
79dbd1ba 5616static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 5617{
79dbd1ba 5618 struct ceph_osd *o = msg->con->private;
33d07337 5619 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5620
33d07337
YZ		 5621 return ceph_auth_check_message_signature(auth, msg);
5622}
5623
9e32789f 5624static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 5625 .get = get_osd_con,
5626 .put = put_osd_con,
5627 .dispatch = dispatch,
4e7a5dcd 5628 .get_authorizer = get_authorizer,
6daca13d 5629 .add_authorizer_challenge = add_authorizer_challenge,
4e7a5dcd 5630 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 5631 .invalidate_authorizer = invalidate_authorizer,
f24e9980 5632 .alloc_msg = alloc_msg,
8cb441c0 5633 .reencode_message = osd_reencode_message,
79dbd1ba
ID		 5634 .sign_message = osd_sign_message,
5635 .check_message_signature = osd_check_message_signature,
5aea3dcd 5636 .fault = osd_fault,
f24e9980 5637};
Linux 6.x block layer and io_uring tree(s)