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Merge tag 'linux-watchdog-6.3-rc1' of git://www.linux-watchdog.org/linux-watchdog
[linux-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;
78beb0ff 405 case CEPH_OSD_OP_COPY_FROM2:
23ddf9be
LH		 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;
2f3fead6 448 dest->recovery_deletes = src->recovery_deletes;
922dab61
ID		 449
450 dest->flags = src->flags;
7ed286f3 451 dest->used_replica = src->used_replica;
922dab61
ID		 452 dest->paused = src->paused;
453
04c7d789 454 dest->epoch = src->epoch;
dc93e0e2
ID		 455 dest->last_force_resend = src->last_force_resend;
456
922dab61
ID		 457 dest->osd = src->osd;
458}
459
63244fa1
ID		 460static void target_destroy(struct ceph_osd_request_target *t)
461{
462 ceph_oid_destroy(&t->base_oid);
30c156d9 463 ceph_oloc_destroy(&t->base_oloc);
63244fa1 464 ceph_oid_destroy(&t->target_oid);
30c156d9 465 ceph_oloc_destroy(&t->target_oloc);
63244fa1
ID		 466}
467
f24e9980
SW		 468/*
469 * requests
470 */
3540bfdb
ID		 471static void request_release_checks(struct ceph_osd_request *req)
472{
473 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
4609245e 474 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
94e85771 475 WARN_ON(!list_empty(&req->r_private_item));
3540bfdb
ID		 476 WARN_ON(req->r_osd);
477}
478
9e94af20 479static void ceph_osdc_release_request(struct kref *kref)
f24e9980 480{
9e94af20
ID		 481 struct ceph_osd_request *req = container_of(kref,
482 struct ceph_osd_request, r_kref);
5476492f 483 unsigned int which;
415e49a9 484
9e94af20
ID		 485 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
486 req->r_request, req->r_reply);
3540bfdb 487 request_release_checks(req);
9e94af20 488
415e49a9
SW		 489 if (req->r_request)
490 ceph_msg_put(req->r_request);
5aea3dcd 491 if (req->r_reply)
ab8cb34a 492 ceph_msg_put(req->r_reply);
0fff87ec 493
5476492f
AE		 494 for (which = 0; which < req->r_num_ops; which++)
495 osd_req_op_data_release(req, which);
0fff87ec 496
a66dd383 497 target_destroy(&req->r_t);
415e49a9 498 ceph_put_snap_context(req->r_snapc);
d30291b9 499
415e49a9
SW		 500 if (req->r_mempool)
501 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 502 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 503 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 504 else
505 kfree(req);
f24e9980 506}
9e94af20
ID		 507
508void ceph_osdc_get_request(struct ceph_osd_request *req)
509{
510 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 511 kref_read(&req->r_kref));
9e94af20
ID		 512 kref_get(&req->r_kref);
513}
514EXPORT_SYMBOL(ceph_osdc_get_request);
515
516void ceph_osdc_put_request(struct ceph_osd_request *req)
517{
3ed97d63
ID		 518 if (req) {
519 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 520 kref_read(&req->r_kref));
3ed97d63
ID		 521 kref_put(&req->r_kref, ceph_osdc_release_request);
522 }
9e94af20
ID		 523}
524EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 525
3540bfdb
ID		 526static void request_init(struct ceph_osd_request *req)
527{
042f6498 528 /* req only, each op is zeroed in osd_req_op_init() */
3540bfdb
ID		 529 memset(req, 0, sizeof(*req));
530
531 kref_init(&req->r_kref);
532 init_completion(&req->r_completion);
3540bfdb 533 RB_CLEAR_NODE(&req->r_node);
4609245e 534 RB_CLEAR_NODE(&req->r_mc_node);
94e85771 535 INIT_LIST_HEAD(&req->r_private_item);
3540bfdb
ID		 536
537 target_init(&req->r_t);
538}
539
3499e8a5 540struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 541 struct ceph_snap_context *snapc,
1b83bef2 542 unsigned int num_ops,
3499e8a5 543 bool use_mempool,
54a54007 544 gfp_t gfp_flags)
f24e9980
SW		 545{
546 struct ceph_osd_request *req;
1b83bef2 547
f24e9980 548 if (use_mempool) {
3f1af42a 549 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 550 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 551 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
552 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 553 } else {
3f1af42a 554 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
acafe7e3 555 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
f24e9980 556 }
3f1af42a 557 if (unlikely(!req))
a79832f2 558 return NULL;
f24e9980 559
3540bfdb 560 request_init(req);
f24e9980
SW		 561 req->r_osdc = osdc;
562 req->r_mempool = use_mempool;
79528734 563 req->r_num_ops = num_ops;
84127282
ID		 564 req->r_snapid = CEPH_NOSNAP;
565 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 566
13d1ad16
ID		 567 dout("%s req %p\n", __func__, req);
568 return req;
569}
570EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 571
2e59ffd1 572static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
30c156d9
YZ		 573{
574 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
575}
576
0d9c1ab3
ID		 577static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
578 int num_request_data_items,
579 int num_reply_data_items)
13d1ad16
ID		 580{
581 struct ceph_osd_client *osdc = req->r_osdc;
582 struct ceph_msg *msg;
583 int msg_size;
c16e7869 584
0d9c1ab3 585 WARN_ON(req->r_request || req->r_reply);
d30291b9 586 WARN_ON(ceph_oid_empty(&req->r_base_oid));
30c156d9 587 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
d30291b9 588
13d1ad16 589 /* create request message */
8cb441c0
ID		 590 msg_size = CEPH_ENCODING_START_BLK_LEN +
591 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
592 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
593 msg_size += CEPH_ENCODING_START_BLK_LEN +
594 sizeof(struct ceph_osd_reqid); /* reqid */
595 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
596 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
30c156d9
YZ		 597 msg_size += CEPH_ENCODING_START_BLK_LEN +
598 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
13d1ad16
ID		 599 msg_size += 4 + req->r_base_oid.name_len; /* oid */
600 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 601 msg_size += 8; /* snapid */
602 msg_size += 8; /* snap_seq */
13d1ad16 603 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
8cb441c0 604 msg_size += 4 + 8; /* retry_attempt, features */
ae458f5a 605
13d1ad16 606 if (req->r_mempool)
0d9c1ab3
ID		 607 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
608 num_request_data_items);
f24e9980 609 else
0d9c1ab3
ID		 610 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
611 num_request_data_items, gfp, true);
13d1ad16
ID		 612 if (!msg)
613 return -ENOMEM;
68b4476b 614
f24e9980 615 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 616 req->r_request = msg;
3499e8a5 617
13d1ad16
ID		 618 /* create reply message */
619 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 620 msg_size += req->r_base_oid.name_len;
621 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 622
623 if (req->r_mempool)
0d9c1ab3
ID		 624 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
625 num_reply_data_items);
13d1ad16 626 else
0d9c1ab3
ID		 627 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
628 num_reply_data_items, gfp, true);
13d1ad16
ID		 629 if (!msg)
630 return -ENOMEM;
631
632 req->r_reply = msg;
633
634 return 0;
3499e8a5
YS		 635}
636
a8dd0a37 637static bool osd_req_opcode_valid(u16 opcode)
68b4476b 638{
a8dd0a37 639 switch (opcode) {
70b5bfa3
ID		 640#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
641__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
642#undef GENERATE_CASE
a8dd0a37
AE		 643 default:
644 return false;
645 }
646}
647
0d9c1ab3
ID		 648static void get_num_data_items(struct ceph_osd_request *req,
649 int *num_request_data_items,
650 int *num_reply_data_items)
651{
652 struct ceph_osd_req_op *op;
653
654 *num_request_data_items = 0;
655 *num_reply_data_items = 0;
656
657 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
658 switch (op->op) {
659 /* request */
660 case CEPH_OSD_OP_WRITE:
661 case CEPH_OSD_OP_WRITEFULL:
662 case CEPH_OSD_OP_SETXATTR:
663 case CEPH_OSD_OP_CMPXATTR:
664 case CEPH_OSD_OP_NOTIFY_ACK:
78beb0ff 665 case CEPH_OSD_OP_COPY_FROM2:
0d9c1ab3
ID		 666 *num_request_data_items += 1;
667 break;
668
669 /* reply */
670 case CEPH_OSD_OP_STAT:
671 case CEPH_OSD_OP_READ:
672 case CEPH_OSD_OP_LIST_WATCHERS:
673 *num_reply_data_items += 1;
674 break;
675
676 /* both */
677 case CEPH_OSD_OP_NOTIFY:
678 *num_request_data_items += 1;
679 *num_reply_data_items += 1;
680 break;
681 case CEPH_OSD_OP_CALL:
682 *num_request_data_items += 2;
683 *num_reply_data_items += 1;
684 break;
685
686 default:
687 WARN_ON(!osd_req_opcode_valid(op->op));
688 break;
689 }
690 }
691}
692
693/*
694 * oid, oloc and OSD op opcode(s) must be filled in before this function
695 * is called.
696 */
697int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
698{
699 int num_request_data_items, num_reply_data_items;
700
701 get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
702 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
703 num_reply_data_items);
704}
705EXPORT_SYMBOL(ceph_osdc_alloc_messages);
706
33803f33
AE		 707/*
708 * This is an osd op init function for opcodes that have no data or
709 * other information associated with them. It also serves as a
710 * common init routine for all the other init functions, below.
711 */
042f6498
JL		 712struct ceph_osd_req_op *
713osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 714 u16 opcode, u32 flags)
33803f33 715{
c99d2d4a
AE		 716 struct ceph_osd_req_op *op;
717
718 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 719 BUG_ON(!osd_req_opcode_valid(opcode));
720
c99d2d4a 721 op = &osd_req->r_ops[which];
33803f33 722 memset(op, 0, sizeof (*op));
33803f33 723 op->op = opcode;
144cba14 724 op->flags = flags;
c99d2d4a
AE		 725
726 return op;
33803f33 727}
49719778
AE		 728EXPORT_SYMBOL(osd_req_op_init);
729
c99d2d4a
AE		 730void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
731 unsigned int which, u16 opcode,
33803f33
AE		 732 u64 offset, u64 length,
733 u64 truncate_size, u32 truncate_seq)
734{
042f6498
JL		 735 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
736 opcode, 0);
33803f33
AE		 737 size_t payload_len = 0;
738
ad7a60de 739 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 740 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
741 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 742
33803f33
AE		 743 op->extent.offset = offset;
744 op->extent.length = length;
745 op->extent.truncate_size = truncate_size;
746 op->extent.truncate_seq = truncate_seq;
e30b7577 747 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 748 payload_len += length;
749
de2aa102 750 op->indata_len = payload_len;
33803f33
AE		 751}
752EXPORT_SYMBOL(osd_req_op_extent_init);
753
c99d2d4a
AE		 754void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
755 unsigned int which, u64 length)
e5975c7c 756{
c99d2d4a
AE		 757 struct ceph_osd_req_op *op;
758 u64 previous;
759
760 BUG_ON(which >= osd_req->r_num_ops);
761 op = &osd_req->r_ops[which];
762 previous = op->extent.length;
e5975c7c
AE		 763
764 if (length == previous)
765 return; /* Nothing to do */
766 BUG_ON(length > previous);
767
768 op->extent.length = length;
d641df81
YZ		 769 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
770 op->indata_len -= previous - length;
e5975c7c
AE		 771}
772EXPORT_SYMBOL(osd_req_op_extent_update);
773
2c63f49a
YZ		 774void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
775 unsigned int which, u64 offset_inc)
776{
777 struct ceph_osd_req_op *op, *prev_op;
778
779 BUG_ON(which + 1 >= osd_req->r_num_ops);
780
781 prev_op = &osd_req->r_ops[which];
042f6498 782 op = osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
2c63f49a
YZ		 783 /* dup previous one */
784 op->indata_len = prev_op->indata_len;
785 op->outdata_len = prev_op->outdata_len;
786 op->extent = prev_op->extent;
787 /* adjust offset */
788 op->extent.offset += offset_inc;
789 op->extent.length -= offset_inc;
790
791 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
792 op->indata_len -= offset_inc;
793}
794EXPORT_SYMBOL(osd_req_op_extent_dup_last);
795
fe943d50 796int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
24639ce5 797 const char *class, const char *method)
33803f33 798{
24639ce5 799 struct ceph_osd_req_op *op;
5f562df5 800 struct ceph_pagelist *pagelist;
33803f33
AE		 801 size_t payload_len = 0;
802 size_t size;
4766815b 803 int ret;
33803f33 804
042f6498 805 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
33803f33 806
33165d47 807 pagelist = ceph_pagelist_alloc(GFP_NOFS);
fe943d50
CX		 808 if (!pagelist)
809 return -ENOMEM;
810
33803f33
AE		 811 op->cls.class_name = class;
812 size = strlen(class);
813 BUG_ON(size > (size_t) U8_MAX);
814 op->cls.class_len = size;
4766815b
DD		 815 ret = ceph_pagelist_append(pagelist, class, size);
816 if (ret)
817 goto err_pagelist_free;
33803f33
AE		 818 payload_len += size;
819
820 op->cls.method_name = method;
821 size = strlen(method);
822 BUG_ON(size > (size_t) U8_MAX);
823 op->cls.method_len = size;
4766815b
DD		 824 ret = ceph_pagelist_append(pagelist, method, size);
825 if (ret)
826 goto err_pagelist_free;
33803f33
AE		 827 payload_len += size;
828
a4ce40a9 829 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
de2aa102 830 op->indata_len = payload_len;
fe943d50 831 return 0;
4766815b
DD		 832
833err_pagelist_free:
834 ceph_pagelist_release(pagelist);
835 return ret;
33803f33
AE		 836}
837EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 838
d74b50be
YZ		 839int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
840 u16 opcode, const char *name, const void *value,
841 size_t size, u8 cmp_op, u8 cmp_mode)
842{
042f6498
JL		 843 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
844 opcode, 0);
d74b50be
YZ		 845 struct ceph_pagelist *pagelist;
846 size_t payload_len;
4766815b 847 int ret;
d74b50be
YZ		 848
849 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
850
33165d47 851 pagelist = ceph_pagelist_alloc(GFP_NOFS);
d74b50be
YZ		 852 if (!pagelist)
853 return -ENOMEM;
854
d74b50be
YZ		 855 payload_len = strlen(name);
856 op->xattr.name_len = payload_len;
4766815b
DD		 857 ret = ceph_pagelist_append(pagelist, name, payload_len);
858 if (ret)
859 goto err_pagelist_free;
d74b50be
YZ		 860
861 op->xattr.value_len = size;
4766815b
DD		 862 ret = ceph_pagelist_append(pagelist, value, size);
863 if (ret)
864 goto err_pagelist_free;
d74b50be
YZ		 865 payload_len += size;
866
867 op->xattr.cmp_op = cmp_op;
868 op->xattr.cmp_mode = cmp_mode;
869
870 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 871 op->indata_len = payload_len;
d74b50be 872 return 0;
4766815b
DD		 873
874err_pagelist_free:
875 ceph_pagelist_release(pagelist);
876 return ret;
d74b50be
YZ		 877}
878EXPORT_SYMBOL(osd_req_op_xattr_init);
879
922dab61
ID		 880/*
881 * @watch_opcode: CEPH_OSD_WATCH_OP_*
882 */
883static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
75dbb685 884 u8 watch_opcode, u64 cookie, u32 gen)
33803f33 885{
922dab61 886 struct ceph_osd_req_op *op;
33803f33 887
042f6498 888 op = osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
33803f33 889 op->watch.cookie = cookie;
922dab61 890 op->watch.op = watch_opcode;
75dbb685
ID		 891 op->watch.gen = gen;
892}
893
894/*
895 * prot_ver, timeout and notify payload (may be empty) should already be
896 * encoded in @request_pl
897 */
898static void osd_req_op_notify_init(struct ceph_osd_request *req, int which,
899 u64 cookie, struct ceph_pagelist *request_pl)
900{
901 struct ceph_osd_req_op *op;
902
903 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
904 op->notify.cookie = cookie;
905
906 ceph_osd_data_pagelist_init(&op->notify.request_data, request_pl);
907 op->indata_len = request_pl->length;
33803f33 908}
33803f33 909
d3798acc
ID		 910/*
911 * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_*
912 */
c647b8a8
ID		 913void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
914 unsigned int which,
915 u64 expected_object_size,
d3798acc
ID		 916 u64 expected_write_size,
917 u32 flags)
c647b8a8 918{
042f6498 919 struct ceph_osd_req_op *op;
c647b8a8 920
042f6498 921 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_SETALLOCHINT, 0);
c647b8a8
ID		 922 op->alloc_hint.expected_object_size = expected_object_size;
923 op->alloc_hint.expected_write_size = expected_write_size;
d3798acc 924 op->alloc_hint.flags = flags;
c647b8a8
ID		 925
926 /*
927 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
928 * not worth a feature bit. Set FAILOK per-op flag to make
929 * sure older osds don't trip over an unsupported opcode.
930 */
931 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
932}
933EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
934
90af3602 935static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 936 struct ceph_osd_data *osd_data)
937{
938 u64 length = ceph_osd_data_length(osd_data);
939
940 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
941 BUG_ON(length > (u64) SIZE_MAX);
942 if (length)
90af3602 943 ceph_msg_data_add_pages(msg, osd_data->pages,
e8862740 944 length, osd_data->alignment, false);
ec9123c5
AE		 945 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
946 BUG_ON(!length);
90af3602 947 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 948#ifdef CONFIG_BLOCK
949 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
5359a17d 950 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
ec9123c5 951#endif
b9e281c2
ID		 952 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
953 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
ec9123c5
AE		 954 } else {
955 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
956 }
957}
958
bb873b53
ID		 959static u32 osd_req_encode_op(struct ceph_osd_op *dst,
960 const struct ceph_osd_req_op *src)
a8dd0a37 961{
a8dd0a37
AE		 962 switch (src->op) {
963 case CEPH_OSD_OP_STAT:
964 break;
965 case CEPH_OSD_OP_READ:
966 case CEPH_OSD_OP_WRITE:
e30b7577 967 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 968 case CEPH_OSD_OP_ZERO:
ad7a60de 969 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37
AE		 970 dst->extent.offset = cpu_to_le64(src->extent.offset);
971 dst->extent.length = cpu_to_le64(src->extent.length);
972 dst->extent.truncate_size =
973 cpu_to_le64(src->extent.truncate_size);
974 dst->extent.truncate_seq =
975 cpu_to_le32(src->extent.truncate_seq);
976 break;
977 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 978 dst->cls.class_len = src->cls.class_len;
979 dst->cls.method_len = src->cls.method_len;
bb873b53 980 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
a8dd0a37 981 break;
a8dd0a37
AE		 982 case CEPH_OSD_OP_WATCH:
983 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
922dab61
ID		 984 dst->watch.ver = cpu_to_le64(0);
985 dst->watch.op = src->watch.op;
986 dst->watch.gen = cpu_to_le32(src->watch.gen);
987 break;
988 case CEPH_OSD_OP_NOTIFY_ACK:
a8dd0a37 989 break;
19079203
ID		 990 case CEPH_OSD_OP_NOTIFY:
991 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
992 break;
a4ed38d7
DF		 993 case CEPH_OSD_OP_LIST_WATCHERS:
994 break;
c647b8a8
ID		 995 case CEPH_OSD_OP_SETALLOCHINT:
996 dst->alloc_hint.expected_object_size =
997 cpu_to_le64(src->alloc_hint.expected_object_size);
998 dst->alloc_hint.expected_write_size =
999 cpu_to_le64(src->alloc_hint.expected_write_size);
d3798acc 1000 dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags);
c647b8a8 1001 break;
d74b50be
YZ		 1002 case CEPH_OSD_OP_SETXATTR:
1003 case CEPH_OSD_OP_CMPXATTR:
1004 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1005 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1006 dst->xattr.cmp_op = src->xattr.cmp_op;
1007 dst->xattr.cmp_mode = src->xattr.cmp_mode;
d74b50be 1008 break;
864e9197
YZ		 1009 case CEPH_OSD_OP_CREATE:
1010 case CEPH_OSD_OP_DELETE:
1011 break;
78beb0ff 1012 case CEPH_OSD_OP_COPY_FROM2:
23ddf9be
LH		 1013 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1014 dst->copy_from.src_version =
1015 cpu_to_le64(src->copy_from.src_version);
1016 dst->copy_from.flags = src->copy_from.flags;
1017 dst->copy_from.src_fadvise_flags =
1018 cpu_to_le32(src->copy_from.src_fadvise_flags);
1019 break;
a8dd0a37 1020 default:
4c46459c 1021 pr_err("unsupported osd opcode %s\n",
8f63ca2d 1022 ceph_osd_op_name(src->op));
4c46459c 1023 WARN_ON(1);
a8dd0a37
AE		 1024
1025 return 0;
68b4476b 1026 }
7b25bf5f 1027
a8dd0a37 1028 dst->op = cpu_to_le16(src->op);
7b25bf5f 1029 dst->flags = cpu_to_le32(src->flags);
de2aa102 1030 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 1031
bb873b53 1032 return src->indata_len;
68b4476b
YS		 1033}
1034
3499e8a5
YS		 1035/*
1036 * build new request AND message, calculate layout, and adjust file
1037 * extent as needed.
1038 *
1039 * if the file was recently truncated, we include information about its
1040 * old and new size so that the object can be updated appropriately. (we
1041 * avoid synchronously deleting truncated objects because it's slow.)
3499e8a5
YS		 1042 */
1043struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1044 struct ceph_file_layout *layout,
1045 struct ceph_vino vino,
715e4cd4
YZ		 1046 u64 off, u64 *plen,
1047 unsigned int which, int num_ops,
3499e8a5
YS		 1048 int opcode, int flags,
1049 struct ceph_snap_context *snapc,
3499e8a5
YS		 1050 u32 truncate_seq,
1051 u64 truncate_size,
153e5167 1052 bool use_mempool)
3499e8a5 1053{
68b4476b 1054 struct ceph_osd_request *req;
75d1c941
AE		 1055 u64 objnum = 0;
1056 u64 objoff = 0;
1057 u64 objlen = 0;
6816282d 1058 int r;
68b4476b 1059
ad7a60de 1060 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 1061 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1062 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 1063
acead002 1064 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 1065 GFP_NOFS);
13d1ad16
ID		 1066 if (!req) {
1067 r = -ENOMEM;
1068 goto fail;
1069 }
79528734 1070
3499e8a5 1071 /* calculate max write size */
a19dadfb 1072 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 1073 if (r)
1074 goto fail;
a19dadfb 1075
864e9197 1076 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 1077 osd_req_op_init(req, which, opcode, 0);
864e9197 1078 } else {
7627151e 1079 u32 object_size = layout->object_size;
864e9197
YZ		 1080 u32 object_base = off - objoff;
1081 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1082 if (truncate_size <= object_base) {
1083 truncate_size = 0;
1084 } else {
1085 truncate_size -= object_base;
1086 if (truncate_size > object_size)
1087 truncate_size = object_size;
1088 }
ccca4e37 1089 }
715e4cd4 1090 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 1091 truncate_size, truncate_seq);
1092 }
d18d1e28 1093
7627151e 1094 req->r_base_oloc.pool = layout->pool_id;
30c156d9 1095 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
d30291b9 1096 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
22d2cfdf 1097 req->r_flags = flags | osdc->client->options->read_from_replica;
dbe0fc41 1098
bb873b53
ID		 1099 req->r_snapid = vino.snap;
1100 if (flags & CEPH_OSD_FLAG_WRITE)
1101 req->r_data_offset = off;
1102
0d9c1ab3
ID		 1103 if (num_ops > 1)
1104 /*
1105 * This is a special case for ceph_writepages_start(), but it
1106 * also covers ceph_uninline_data(). If more multi-op request
1107 * use cases emerge, we will need a separate helper.
1108 */
1109 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
1110 else
1111 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
13d1ad16
ID		 1112 if (r)
1113 goto fail;
1114
f24e9980 1115 return req;
13d1ad16
ID		 1116
1117fail:
1118 ceph_osdc_put_request(req);
1119 return ERR_PTR(r);
f24e9980 1120}
3d14c5d2 1121EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 1122
1123/*
1124 * We keep osd requests in an rbtree, sorted by ->r_tid.
1125 */
fcd00b68 1126DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
4609245e 1127DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
f24e9980 1128
66850df5
ID		 1129/*
1130 * Call @fn on each OSD request as long as @fn returns 0.
1131 */
1132static void for_each_request(struct ceph_osd_client *osdc,
1133 int (*fn)(struct ceph_osd_request *req, void *arg),
1134 void *arg)
1135{
1136 struct rb_node *n, *p;
1137
1138 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1139 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1140
1141 for (p = rb_first(&osd->o_requests); p; ) {
1142 struct ceph_osd_request *req =
1143 rb_entry(p, struct ceph_osd_request, r_node);
1144
1145 p = rb_next(p);
1146 if (fn(req, arg))
1147 return;
1148 }
1149 }
1150
1151 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1152 struct ceph_osd_request *req =
1153 rb_entry(p, struct ceph_osd_request, r_node);
1154
1155 p = rb_next(p);
1156 if (fn(req, arg))
1157 return;
1158 }
1159}
1160
0247a0cf
ID		 1161static bool osd_homeless(struct ceph_osd *osd)
1162{
1163 return osd->o_osd == CEPH_HOMELESS_OSD;
1164}
1165
5aea3dcd 1166static bool osd_registered(struct ceph_osd *osd)
f24e9980 1167{
5aea3dcd 1168 verify_osdc_locked(osd->o_osdc);
f24e9980 1169
5aea3dcd 1170 return !RB_EMPTY_NODE(&osd->o_node);
f24e9980
SW		 1171}
1172
0247a0cf
ID		 1173/*
1174 * Assumes @osd is zero-initialized.
1175 */
1176static void osd_init(struct ceph_osd *osd)
1177{
02113a0f 1178 refcount_set(&osd->o_ref, 1);
0247a0cf 1179 RB_CLEAR_NODE(&osd->o_node);
5aea3dcd 1180 osd->o_requests = RB_ROOT;
922dab61 1181 osd->o_linger_requests = RB_ROOT;
a02a946d
ID		 1182 osd->o_backoff_mappings = RB_ROOT;
1183 osd->o_backoffs_by_id = RB_ROOT;
0247a0cf
ID		 1184 INIT_LIST_HEAD(&osd->o_osd_lru);
1185 INIT_LIST_HEAD(&osd->o_keepalive_item);
1186 osd->o_incarnation = 1;
5aea3dcd 1187 mutex_init(&osd->lock);
0247a0cf
ID		 1188}
1189
1190static void osd_cleanup(struct ceph_osd *osd)
1191{
1192 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
5aea3dcd 1193 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 1194 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
a02a946d
ID		 1195 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1196 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
0247a0cf
ID		 1197 WARN_ON(!list_empty(&osd->o_osd_lru));
1198 WARN_ON(!list_empty(&osd->o_keepalive_item));
1199
1200 if (osd->o_auth.authorizer) {
1201 WARN_ON(osd_homeless(osd));
1202 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1203 }
1204}
1205
f24e9980
SW		 1206/*
1207 * Track open sessions with osds.
1208 */
e10006f8 1209static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1210{
1211 struct ceph_osd *osd;
1212
0247a0cf
ID		 1213 WARN_ON(onum == CEPH_HOMELESS_OSD);
1214
7a28f59b 1215 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
0247a0cf 1216 osd_init(osd);
f24e9980 1217 osd->o_osdc = osdc;
e10006f8 1218 osd->o_osd = onum;
f24e9980 1219
b7a9e5dd 1220 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1221
f24e9980
SW		 1222 return osd;
1223}
1224
1225static struct ceph_osd *get_osd(struct ceph_osd *osd)
1226{
02113a0f
ER		 1227 if (refcount_inc_not_zero(&osd->o_ref)) {
1228 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1229 refcount_read(&osd->o_ref));
f24e9980
SW		 1230 return osd;
1231 } else {
1232 dout("get_osd %p FAIL\n", osd);
1233 return NULL;
1234 }
1235}
1236
1237static void put_osd(struct ceph_osd *osd)
1238{
02113a0f
ER		 1239 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1240 refcount_read(&osd->o_ref) - 1);
1241 if (refcount_dec_and_test(&osd->o_ref)) {
0247a0cf 1242 osd_cleanup(osd);
f24e9980 1243 kfree(osd);
79494d1b 1244 }
f24e9980
SW		 1245}
1246
fcd00b68
ID		 1247DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1248
9dd2845c 1249static void __move_osd_to_lru(struct ceph_osd *osd)
f5a2041b 1250{
9dd2845c
ID		 1251 struct ceph_osd_client *osdc = osd->o_osdc;
1252
1253 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
f5a2041b 1254 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1255
9dd2845c 1256 spin_lock(&osdc->osd_lru_lock);
f5a2041b 1257 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
9dd2845c
ID		 1258 spin_unlock(&osdc->osd_lru_lock);
1259
a319bf56 1260 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1261}
1262
9dd2845c 1263static void maybe_move_osd_to_lru(struct ceph_osd *osd)
bbf37ec3 1264{
5aea3dcd 1265 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1266 RB_EMPTY_ROOT(&osd->o_linger_requests))
9dd2845c 1267 __move_osd_to_lru(osd);
bbf37ec3
ID		 1268}
1269
f5a2041b
YS		 1270static void __remove_osd_from_lru(struct ceph_osd *osd)
1271{
9dd2845c
ID		 1272 struct ceph_osd_client *osdc = osd->o_osdc;
1273
1274 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1275
1276 spin_lock(&osdc->osd_lru_lock);
f5a2041b
YS		 1277 if (!list_empty(&osd->o_osd_lru))
1278 list_del_init(&osd->o_osd_lru);
9dd2845c 1279 spin_unlock(&osdc->osd_lru_lock);
f5a2041b
YS		 1280}
1281
5aea3dcd
ID		 1282/*
1283 * Close the connection and assign any leftover requests to the
1284 * homeless session.
1285 */
1286static void close_osd(struct ceph_osd *osd)
1287{
1288 struct ceph_osd_client *osdc = osd->o_osdc;
1289 struct rb_node *n;
1290
1291 verify_osdc_wrlocked(osdc);
1292 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1293
1294 ceph_con_close(&osd->o_con);
1295
1296 for (n = rb_first(&osd->o_requests); n; ) {
1297 struct ceph_osd_request *req =
1298 rb_entry(n, struct ceph_osd_request, r_node);
1299
1300 n = rb_next(n); /* unlink_request() */
1301
1302 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1303 unlink_request(osd, req);
1304 link_request(&osdc->homeless_osd, req);
1305 }
922dab61
ID		 1306 for (n = rb_first(&osd->o_linger_requests); n; ) {
1307 struct ceph_osd_linger_request *lreq =
1308 rb_entry(n, struct ceph_osd_linger_request, node);
1309
1310 n = rb_next(n); /* unlink_linger() */
1311
1312 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1313 lreq->linger_id);
1314 unlink_linger(osd, lreq);
1315 link_linger(&osdc->homeless_osd, lreq);
1316 }
a02a946d 1317 clear_backoffs(osd);
5aea3dcd
ID		 1318
1319 __remove_osd_from_lru(osd);
1320 erase_osd(&osdc->osds, osd);
1321 put_osd(osd);
1322}
1323
f24e9980
SW		 1324/*
1325 * reset osd connect
1326 */
5aea3dcd 1327static int reopen_osd(struct ceph_osd *osd)
f24e9980 1328{
c3acb181 1329 struct ceph_entity_addr *peer_addr;
f24e9980 1330
5aea3dcd
ID		 1331 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1332
1333 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1334 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
5aea3dcd 1335 close_osd(osd);
c3acb181
AE		 1336 return -ENODEV;
1337 }
1338
5aea3dcd 1339 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
c3acb181
AE		 1340 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1341 !ceph_con_opened(&osd->o_con)) {
5aea3dcd 1342 struct rb_node *n;
c3acb181 1343
0b4af2e8
ID		 1344 dout("osd addr hasn't changed and connection never opened, "
1345 "letting msgr retry\n");
87b315a5 1346 /* touch each r_stamp for handle_timeout()'s benfit */
5aea3dcd
ID		 1347 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1348 struct ceph_osd_request *req =
1349 rb_entry(n, struct ceph_osd_request, r_node);
87b315a5 1350 req->r_stamp = jiffies;
5aea3dcd 1351 }
c3acb181
AE		 1352
1353 return -EAGAIN;
f24e9980 1354 }
c3acb181
AE		 1355
1356 ceph_con_close(&osd->o_con);
1357 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1358 osd->o_incarnation++;
1359
1360 return 0;
f24e9980
SW		 1361}
1362
5aea3dcd
ID		 1363static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1364 bool wrlocked)
f24e9980 1365{
5aea3dcd 1366 struct ceph_osd *osd;
35f9f8a0 1367
5aea3dcd
ID		 1368 if (wrlocked)
1369 verify_osdc_wrlocked(osdc);
1370 else
1371 verify_osdc_locked(osdc);
f24e9980 1372
5aea3dcd
ID		 1373 if (o != CEPH_HOMELESS_OSD)
1374 osd = lookup_osd(&osdc->osds, o);
1375 else
1376 osd = &osdc->homeless_osd;
1377 if (!osd) {
1378 if (!wrlocked)
1379 return ERR_PTR(-EAGAIN);
0ba6478d 1380
5aea3dcd
ID		 1381 osd = create_osd(osdc, o);
1382 insert_osd(&osdc->osds, osd);
1383 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1384 &osdc->osdmap->osd_addr[osd->o_osd]);
0ba6478d 1385 }
f24e9980 1386
5aea3dcd
ID		 1387 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1388 return osd;
f24e9980
SW		 1389}
1390
1391/*
5aea3dcd
ID		 1392 * Create request <-> OSD session relation.
1393 *
1394 * @req has to be assigned a tid, @osd may be homeless.
f24e9980 1395 */
5aea3dcd 1396static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
f24e9980 1397{
5aea3dcd
ID		 1398 verify_osd_locked(osd);
1399 WARN_ON(!req->r_tid || req->r_osd);
1400 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1401 req, req->r_tid);
1402
1403 if (!osd_homeless(osd))
1404 __remove_osd_from_lru(osd);
1405 else
1406 atomic_inc(&osd->o_osdc->num_homeless);
1407
1408 get_osd(osd);
1409 insert_request(&osd->o_requests, req);
1410 req->r_osd = osd;
f24e9980
SW		 1411}
1412
5aea3dcd
ID		 1413static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1414{
1415 verify_osd_locked(osd);
1416 WARN_ON(req->r_osd != osd);
1417 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1418 req, req->r_tid);
1419
1420 req->r_osd = NULL;
1421 erase_request(&osd->o_requests, req);
1422 put_osd(osd);
1423
1424 if (!osd_homeless(osd))
1425 maybe_move_osd_to_lru(osd);
1426 else
1427 atomic_dec(&osd->o_osdc->num_homeless);
1428}
1429
63244fa1
ID		 1430static bool __pool_full(struct ceph_pg_pool_info *pi)
1431{
1432 return pi->flags & CEPH_POOL_FLAG_FULL;
1433}
1434
42c1b124
ID		 1435static bool have_pool_full(struct ceph_osd_client *osdc)
1436{
1437 struct rb_node *n;
1438
1439 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1440 struct ceph_pg_pool_info *pi =
1441 rb_entry(n, struct ceph_pg_pool_info, node);
1442
1443 if (__pool_full(pi))
1444 return true;
1445 }
1446
1447 return false;
1448}
1449
5aea3dcd
ID		 1450static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1451{
1452 struct ceph_pg_pool_info *pi;
1453
1454 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1455 if (!pi)
1456 return false;
1457
1458 return __pool_full(pi);
1459}
1460
d29adb34
JD		 1461/*
1462 * Returns whether a request should be blocked from being sent
1463 * based on the current osdmap and osd_client settings.
d29adb34 1464 */
63244fa1
ID		 1465static bool target_should_be_paused(struct ceph_osd_client *osdc,
1466 const struct ceph_osd_request_target *t,
1467 struct ceph_pg_pool_info *pi)
1468{
b7ec35b3
ID		 1469 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1470 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1471 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
63244fa1
ID		 1472 __pool_full(pi);
1473
6d637a54 1474 WARN_ON(pi->id != t->target_oloc.pool);
58eb7932
JL		 1475 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1476 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1477 (osdc->osdmap->epoch < osdc->epoch_barrier);
63244fa1
ID		 1478}
1479
117d96a0
ID		 1480static int pick_random_replica(const struct ceph_osds *acting)
1481{
8032bf12 1482 int i = get_random_u32_below(acting->size);
117d96a0
ID		 1483
1484 dout("%s picked osd%d, primary osd%d\n", __func__,
1485 acting->osds[i], acting->primary);
1486 return i;
1487}
1488
1489/*
1490 * Picks the closest replica based on client's location given by
1491 * crush_location option. Prefers the primary if the locality is
1492 * the same.
1493 */
1494static int pick_closest_replica(struct ceph_osd_client *osdc,
1495 const struct ceph_osds *acting)
1496{
1497 struct ceph_options *opt = osdc->client->options;
1498 int best_i, best_locality;
1499 int i = 0, locality;
1500
1501 do {
1502 locality = ceph_get_crush_locality(osdc->osdmap,
1503 acting->osds[i],
1504 &opt->crush_locs);
1505 if (i == 0 ||
1506 (locality >= 0 && best_locality < 0) ||
1507 (locality >= 0 && best_locality >= 0 &&
1508 locality < best_locality)) {
1509 best_i = i;
1510 best_locality = locality;
1511 }
1512 } while (++i < acting->size);
1513
1514 dout("%s picked osd%d with locality %d, primary osd%d\n", __func__,
1515 acting->osds[best_i], best_locality, acting->primary);
1516 return best_i;
1517}
1518
63244fa1
ID		 1519enum calc_target_result {
1520 CALC_TARGET_NO_ACTION = 0,
1521 CALC_TARGET_NEED_RESEND,
1522 CALC_TARGET_POOL_DNE,
1523};
1524
1525static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1526 struct ceph_osd_request_target *t,
63244fa1
ID		 1527 bool any_change)
1528{
1529 struct ceph_pg_pool_info *pi;
1530 struct ceph_pg pgid, last_pgid;
1531 struct ceph_osds up, acting;
117d96a0
ID		 1532 bool is_read = t->flags & CEPH_OSD_FLAG_READ;
1533 bool is_write = t->flags & CEPH_OSD_FLAG_WRITE;
63244fa1 1534 bool force_resend = false;
84ed45df 1535 bool unpaused = false;
a5613724 1536 bool legacy_change = false;
7de030d6 1537 bool split = false;
b7ec35b3 1538 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
ae78dd81
ID		 1539 bool recovery_deletes = ceph_osdmap_flag(osdc,
1540 CEPH_OSDMAP_RECOVERY_DELETES);
63244fa1 1541 enum calc_target_result ct_res;
63244fa1 1542
04c7d789 1543 t->epoch = osdc->osdmap->epoch;
63244fa1
ID		 1544 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1545 if (!pi) {
1546 t->osd = CEPH_HOMELESS_OSD;
1547 ct_res = CALC_TARGET_POOL_DNE;
1548 goto out;
1549 }
1550
1551 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
dc93e0e2
ID		 1552 if (t->last_force_resend < pi->last_force_request_resend) {
1553 t->last_force_resend = pi->last_force_request_resend;
63244fa1 1554 force_resend = true;
dc93e0e2 1555 } else if (t->last_force_resend == 0) {
63244fa1
ID		 1556 force_resend = true;
1557 }
1558 }
63244fa1 1559
db098ec4
ID		 1560 /* apply tiering */
1561 ceph_oid_copy(&t->target_oid, &t->base_oid);
1562 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1563 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
117d96a0 1564 if (is_read && pi->read_tier >= 0)
63244fa1 1565 t->target_oloc.pool = pi->read_tier;
117d96a0 1566 if (is_write && pi->write_tier >= 0)
63244fa1 1567 t->target_oloc.pool = pi->write_tier;
6d637a54
ID		 1568
1569 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1570 if (!pi) {
1571 t->osd = CEPH_HOMELESS_OSD;
1572 ct_res = CALC_TARGET_POOL_DNE;
1573 goto out;
1574 }
63244fa1
ID		 1575 }
1576
a86f009f 1577 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
63244fa1
ID		 1578 last_pgid.pool = pgid.pool;
1579 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1580
df28152d 1581 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
63244fa1
ID		 1582 if (any_change &&
1583 ceph_is_new_interval(&t->acting,
1584 &acting,
1585 &t->up,
1586 &up,
1587 t->size,
1588 pi->size,
1589 t->min_size,
1590 pi->min_size,
1591 t->pg_num,
1592 pi->pg_num,
1593 t->sort_bitwise,
1594 sort_bitwise,
ae78dd81
ID		 1595 t->recovery_deletes,
1596 recovery_deletes,
63244fa1
ID		 1597 &last_pgid))
1598 force_resend = true;
1599
1600 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1601 t->paused = false;
84ed45df 1602 unpaused = true;
63244fa1 1603 }
84ed45df 1604 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
117d96a0
ID		 1605 ceph_osds_changed(&t->acting, &acting,
1606 t->used_replica || any_change);
7de030d6
ID		 1607 if (t->pg_num)
1608 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
63244fa1 1609
7de030d6 1610 if (legacy_change || force_resend || split) {
63244fa1 1611 t->pgid = pgid; /* struct */
df28152d 1612 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
63244fa1
ID		 1613 ceph_osds_copy(&t->acting, &acting);
1614 ceph_osds_copy(&t->up, &up);
1615 t->size = pi->size;
1616 t->min_size = pi->min_size;
1617 t->pg_num = pi->pg_num;
1618 t->pg_num_mask = pi->pg_num_mask;
1619 t->sort_bitwise = sort_bitwise;
ae78dd81 1620 t->recovery_deletes = recovery_deletes;
63244fa1 1621
117d96a0
ID		 1622 if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS |
1623 CEPH_OSD_FLAG_LOCALIZE_READS)) &&
1624 !is_write && pi->type == CEPH_POOL_TYPE_REP &&
1625 acting.size > 1) {
1626 int pos;
1627
1628 WARN_ON(!is_read || acting.osds[0] != acting.primary);
1629 if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) {
1630 pos = pick_random_replica(&acting);
1631 } else {
1632 pos = pick_closest_replica(osdc, &acting);
1633 }
1634 t->osd = acting.osds[pos];
1635 t->used_replica = pos > 0;
1636 } else {
1637 t->osd = acting.primary;
1638 t->used_replica = false;
1639 }
63244fa1
ID		 1640 }
1641
a5613724 1642 if (unpaused || legacy_change || force_resend || split)
84ed45df
ID		 1643 ct_res = CALC_TARGET_NEED_RESEND;
1644 else
1645 ct_res = CALC_TARGET_NO_ACTION;
1646
63244fa1 1647out:
a5613724
ID		 1648 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1649 legacy_change, force_resend, split, ct_res, t->osd);
63244fa1
ID		 1650 return ct_res;
1651}
1652
a02a946d
ID		 1653static struct ceph_spg_mapping *alloc_spg_mapping(void)
1654{
1655 struct ceph_spg_mapping *spg;
1656
1657 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1658 if (!spg)
1659 return NULL;
1660
1661 RB_CLEAR_NODE(&spg->node);
1662 spg->backoffs = RB_ROOT;
1663 return spg;
1664}
1665
1666static void free_spg_mapping(struct ceph_spg_mapping *spg)
1667{
1668 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1669 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1670
1671 kfree(spg);
1672}
1673
1674/*
1675 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1676 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1677 * defined only within a specific spgid; it does not pass anything to
1678 * children on split, or to another primary.
1679 */
1680DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1681 RB_BYPTR, const struct ceph_spg *, node)
1682
1683static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1684{
1685 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1686}
1687
1688static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1689 void **pkey, size_t *pkey_len)
1690{
1691 if (hoid->key_len) {
1692 *pkey = hoid->key;
1693 *pkey_len = hoid->key_len;
1694 } else {
1695 *pkey = hoid->oid;
1696 *pkey_len = hoid->oid_len;
1697 }
1698}
1699
1700static int compare_names(const void *name1, size_t name1_len,
1701 const void *name2, size_t name2_len)
1702{
1703 int ret;
1704
1705 ret = memcmp(name1, name2, min(name1_len, name2_len));
1706 if (!ret) {
1707 if (name1_len < name2_len)
1708 ret = -1;
1709 else if (name1_len > name2_len)
1710 ret = 1;
1711 }
1712 return ret;
1713}
1714
1715static int hoid_compare(const struct ceph_hobject_id *lhs,
1716 const struct ceph_hobject_id *rhs)
1717{
1718 void *effective_key1, *effective_key2;
1719 size_t effective_key1_len, effective_key2_len;
1720 int ret;
1721
1722 if (lhs->is_max < rhs->is_max)
1723 return -1;
1724 if (lhs->is_max > rhs->is_max)
1725 return 1;
1726
1727 if (lhs->pool < rhs->pool)
1728 return -1;
1729 if (lhs->pool > rhs->pool)
1730 return 1;
1731
1732 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1733 return -1;
1734 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1735 return 1;
1736
1737 ret = compare_names(lhs->nspace, lhs->nspace_len,
1738 rhs->nspace, rhs->nspace_len);
1739 if (ret)
1740 return ret;
1741
1742 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1743 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1744 ret = compare_names(effective_key1, effective_key1_len,
1745 effective_key2, effective_key2_len);
1746 if (ret)
1747 return ret;
1748
1749 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1750 if (ret)
1751 return ret;
1752
1753 if (lhs->snapid < rhs->snapid)
1754 return -1;
1755 if (lhs->snapid > rhs->snapid)
1756 return 1;
1757
1758 return 0;
1759}
1760
1761/*
1762 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1763 * compat stuff here.
1764 *
1765 * Assumes @hoid is zero-initialized.
1766 */
1767static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1768{
1769 u8 struct_v;
1770 u32 struct_len;
1771 int ret;
1772
1773 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1774 &struct_len);
1775 if (ret)
1776 return ret;
1777
1778 if (struct_v < 4) {
1779 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1780 goto e_inval;
1781 }
1782
1783 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1784 GFP_NOIO);
1785 if (IS_ERR(hoid->key)) {
1786 ret = PTR_ERR(hoid->key);
1787 hoid->key = NULL;
1788 return ret;
1789 }
1790
1791 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1792 GFP_NOIO);
1793 if (IS_ERR(hoid->oid)) {
1794 ret = PTR_ERR(hoid->oid);
1795 hoid->oid = NULL;
1796 return ret;
1797 }
1798
1799 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1800 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1801 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1802
1803 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1804 GFP_NOIO);
1805 if (IS_ERR(hoid->nspace)) {
1806 ret = PTR_ERR(hoid->nspace);
1807 hoid->nspace = NULL;
1808 return ret;
1809 }
1810
1811 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1812
1813 ceph_hoid_build_hash_cache(hoid);
1814 return 0;
1815
1816e_inval:
1817 return -EINVAL;
1818}
1819
1820static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1821{
1822 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1823 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1824}
1825
1826static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1827{
1828 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1829 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1830 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1831 ceph_encode_64(p, hoid->snapid);
1832 ceph_encode_32(p, hoid->hash);
1833 ceph_encode_8(p, hoid->is_max);
1834 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1835 ceph_encode_64(p, hoid->pool);
1836}
1837
1838static void free_hoid(struct ceph_hobject_id *hoid)
1839{
1840 if (hoid) {
1841 kfree(hoid->key);
1842 kfree(hoid->oid);
1843 kfree(hoid->nspace);
1844 kfree(hoid);
1845 }
1846}
1847
1848static struct ceph_osd_backoff *alloc_backoff(void)
1849{
1850 struct ceph_osd_backoff *backoff;
1851
1852 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1853 if (!backoff)
1854 return NULL;
1855
1856 RB_CLEAR_NODE(&backoff->spg_node);
1857 RB_CLEAR_NODE(&backoff->id_node);
1858 return backoff;
1859}
1860
1861static void free_backoff(struct ceph_osd_backoff *backoff)
1862{
1863 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1864 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1865
1866 free_hoid(backoff->begin);
1867 free_hoid(backoff->end);
1868 kfree(backoff);
1869}
1870
1871/*
1872 * Within a specific spgid, backoffs are managed by ->begin hoid.
1873 */
1874DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1875 RB_BYVAL, spg_node);
1876
1877static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1878 const struct ceph_hobject_id *hoid)
1879{
1880 struct rb_node *n = root->rb_node;
1881
1882 while (n) {
1883 struct ceph_osd_backoff *cur =
1884 rb_entry(n, struct ceph_osd_backoff, spg_node);
1885 int cmp;
1886
1887 cmp = hoid_compare(hoid, cur->begin);
1888 if (cmp < 0) {
1889 n = n->rb_left;
1890 } else if (cmp > 0) {
1891 if (hoid_compare(hoid, cur->end) < 0)
1892 return cur;
1893
1894 n = n->rb_right;
1895 } else {
1896 return cur;
1897 }
1898 }
1899
1900 return NULL;
1901}
1902
1903/*
1904 * Each backoff has a unique id within its OSD session.
1905 */
1906DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1907
1908static void clear_backoffs(struct ceph_osd *osd)
1909{
1910 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1911 struct ceph_spg_mapping *spg =
1912 rb_entry(rb_first(&osd->o_backoff_mappings),
1913 struct ceph_spg_mapping, node);
1914
1915 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1916 struct ceph_osd_backoff *backoff =
1917 rb_entry(rb_first(&spg->backoffs),
1918 struct ceph_osd_backoff, spg_node);
1919
1920 erase_backoff(&spg->backoffs, backoff);
1921 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1922 free_backoff(backoff);
1923 }
1924 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1925 free_spg_mapping(spg);
1926 }
1927}
1928
1929/*
1930 * Set up a temporary, non-owning view into @t.
1931 */
1932static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1933 const struct ceph_osd_request_target *t)
1934{
1935 hoid->key = NULL;
1936 hoid->key_len = 0;
1937 hoid->oid = t->target_oid.name;
1938 hoid->oid_len = t->target_oid.name_len;
1939 hoid->snapid = CEPH_NOSNAP;
1940 hoid->hash = t->pgid.seed;
1941 hoid->is_max = false;
1942 if (t->target_oloc.pool_ns) {
1943 hoid->nspace = t->target_oloc.pool_ns->str;
1944 hoid->nspace_len = t->target_oloc.pool_ns->len;
1945 } else {
1946 hoid->nspace = NULL;
1947 hoid->nspace_len = 0;
1948 }
1949 hoid->pool = t->target_oloc.pool;
1950 ceph_hoid_build_hash_cache(hoid);
1951}
1952
1953static bool should_plug_request(struct ceph_osd_request *req)
1954{
1955 struct ceph_osd *osd = req->r_osd;
1956 struct ceph_spg_mapping *spg;
1957 struct ceph_osd_backoff *backoff;
1958 struct ceph_hobject_id hoid;
1959
1960 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1961 if (!spg)
1962 return false;
1963
1964 hoid_fill_from_target(&hoid, &req->r_t);
1965 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1966 if (!backoff)
1967 return false;
1968
1969 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1970 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1971 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1972 return true;
1973}
1974
0d9c1ab3
ID		 1975/*
1976 * Keep get_num_data_items() in sync with this function.
1977 */
98c4bfe9 1978static void setup_request_data(struct ceph_osd_request *req)
f24e9980 1979{
98c4bfe9
ID		 1980 struct ceph_msg *request_msg = req->r_request;
1981 struct ceph_msg *reply_msg = req->r_reply;
1982 struct ceph_osd_req_op *op;
bb873b53 1983
98c4bfe9 1984 if (req->r_request->num_data_items || req->r_reply->num_data_items)
bb873b53 1985 return;
f24e9980 1986
98c4bfe9
ID		 1987 WARN_ON(request_msg->data_length || reply_msg->data_length);
1988 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
bb873b53
ID		 1989 switch (op->op) {
1990 /* request */
1991 case CEPH_OSD_OP_WRITE:
1992 case CEPH_OSD_OP_WRITEFULL:
1993 WARN_ON(op->indata_len != op->extent.length);
98c4bfe9
ID		 1994 ceph_osdc_msg_data_add(request_msg,
1995 &op->extent.osd_data);
bb873b53
ID		 1996 break;
1997 case CEPH_OSD_OP_SETXATTR:
1998 case CEPH_OSD_OP_CMPXATTR:
1999 WARN_ON(op->indata_len != op->xattr.name_len +
2000 op->xattr.value_len);
98c4bfe9
ID		 2001 ceph_osdc_msg_data_add(request_msg,
2002 &op->xattr.osd_data);
bb873b53 2003 break;
922dab61 2004 case CEPH_OSD_OP_NOTIFY_ACK:
98c4bfe9 2005 ceph_osdc_msg_data_add(request_msg,
922dab61
ID		 2006 &op->notify_ack.request_data);
2007 break;
78beb0ff 2008 case CEPH_OSD_OP_COPY_FROM2:
23ddf9be
LH		 2009 ceph_osdc_msg_data_add(request_msg,
2010 &op->copy_from.osd_data);
2011 break;
bb873b53
ID		 2012
2013 /* reply */
2014 case CEPH_OSD_OP_STAT:
98c4bfe9 2015 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 2016 &op->raw_data_in);
2017 break;
2018 case CEPH_OSD_OP_READ:
98c4bfe9 2019 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 2020 &op->extent.osd_data);
2021 break;
a4ed38d7 2022 case CEPH_OSD_OP_LIST_WATCHERS:
98c4bfe9 2023 ceph_osdc_msg_data_add(reply_msg,
a4ed38d7
DF		 2024 &op->list_watchers.response_data);
2025 break;
bb873b53
ID		 2026
2027 /* both */
2028 case CEPH_OSD_OP_CALL:
2029 WARN_ON(op->indata_len != op->cls.class_len +
2030 op->cls.method_len +
2031 op->cls.indata_len);
98c4bfe9
ID		 2032 ceph_osdc_msg_data_add(request_msg,
2033 &op->cls.request_info);
bb873b53 2034 /* optional, can be NONE */
98c4bfe9
ID		 2035 ceph_osdc_msg_data_add(request_msg,
2036 &op->cls.request_data);
bb873b53 2037 /* optional, can be NONE */
98c4bfe9 2038 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 2039 &op->cls.response_data);
2040 break;
19079203 2041 case CEPH_OSD_OP_NOTIFY:
98c4bfe9 2042 ceph_osdc_msg_data_add(request_msg,
19079203 2043 &op->notify.request_data);
98c4bfe9 2044 ceph_osdc_msg_data_add(reply_msg,
19079203
ID		 2045 &op->notify.response_data);
2046 break;
bb873b53 2047 }
bb873b53 2048 }
bb873b53
ID		 2049}
2050
2e59ffd1
ID		 2051static void encode_pgid(void **p, const struct ceph_pg *pgid)
2052{
2053 ceph_encode_8(p, 1);
2054 ceph_encode_64(p, pgid->pool);
2055 ceph_encode_32(p, pgid->seed);
2056 ceph_encode_32(p, -1); /* preferred */
2057}
2058
8cb441c0
ID		 2059static void encode_spgid(void **p, const struct ceph_spg *spgid)
2060{
2061 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2062 encode_pgid(p, &spgid->pgid);
2063 ceph_encode_8(p, spgid->shard);
2064}
2065
2e59ffd1
ID		 2066static void encode_oloc(void **p, void *end,
2067 const struct ceph_object_locator *oloc)
2068{
2069 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2070 ceph_encode_64(p, oloc->pool);
2071 ceph_encode_32(p, -1); /* preferred */
2072 ceph_encode_32(p, 0); /* key len */
2073 if (oloc->pool_ns)
2074 ceph_encode_string(p, end, oloc->pool_ns->str,
2075 oloc->pool_ns->len);
2076 else
2077 ceph_encode_32(p, 0);
2078}
2079
8cb441c0
ID		 2080static void encode_request_partial(struct ceph_osd_request *req,
2081 struct ceph_msg *msg)
bb873b53
ID		 2082{
2083 void *p = msg->front.iov_base;
2084 void *const end = p + msg->front_alloc_len;
2085 u32 data_len = 0;
2086 int i;
2087
2088 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2089 /* snapshots aren't writeable */
2090 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2091 } else {
2092 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2093 req->r_data_offset || req->r_snapc);
2094 }
2095
98c4bfe9 2096 setup_request_data(req);
bb873b53 2097
8cb441c0
ID		 2098 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2099 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
bb873b53
ID		 2100 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2101 ceph_encode_32(&p, req->r_flags);
8cb441c0
ID		 2102
2103 /* reqid */
2104 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2105 memset(p, 0, sizeof(struct ceph_osd_reqid));
2106 p += sizeof(struct ceph_osd_reqid);
2107
2108 /* trace */
2109 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2110 p += sizeof(struct ceph_blkin_trace_info);
2111
2112 ceph_encode_32(&p, 0); /* client_inc, always 0 */
fac02ddf 2113 ceph_encode_timespec64(p, &req->r_mtime);
bb873b53 2114 p += sizeof(struct ceph_timespec);
aa26d662 2115
2e59ffd1 2116 encode_oloc(&p, end, &req->r_t.target_oloc);
2e59ffd1
ID		 2117 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2118 req->r_t.target_oid.name_len);
f24e9980 2119
bb873b53
ID		 2120 /* ops, can imply data */
2121 ceph_encode_16(&p, req->r_num_ops);
2122 for (i = 0; i < req->r_num_ops; i++) {
2123 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2124 p += sizeof(struct ceph_osd_op);
2125 }
26be8808 2126
bb873b53
ID		 2127 ceph_encode_64(&p, req->r_snapid); /* snapid */
2128 if (req->r_snapc) {
2129 ceph_encode_64(&p, req->r_snapc->seq);
2130 ceph_encode_32(&p, req->r_snapc->num_snaps);
2131 for (i = 0; i < req->r_snapc->num_snaps; i++)
2132 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2133 } else {
2134 ceph_encode_64(&p, 0); /* snap_seq */
2135 ceph_encode_32(&p, 0); /* snaps len */
2136 }
2137
2138 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
986e8989 2139 BUG_ON(p > end - 8); /* space for features */
bb873b53 2140
8cb441c0
ID		 2141 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2142 /* front_len is finalized in encode_request_finish() */
986e8989
ID		 2143 msg->front.iov_len = p - msg->front.iov_base;
2144 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
bb873b53
ID		 2145 msg->hdr.data_len = cpu_to_le32(data_len);
2146 /*
2147 * The header "data_off" is a hint to the receiver allowing it
2148 * to align received data into its buffers such that there's no
2149 * need to re-copy it before writing it to disk (direct I/O).
2150 */
2151 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
26be8808 2152
8cb441c0
ID		 2153 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2154 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2155}
2156
2157static void encode_request_finish(struct ceph_msg *msg)
2158{
2159 void *p = msg->front.iov_base;
986e8989 2160 void *const partial_end = p + msg->front.iov_len;
8cb441c0
ID		 2161 void *const end = p + msg->front_alloc_len;
2162
2163 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2164 /* luminous OSD -- encode features and be done */
986e8989 2165 p = partial_end;
8cb441c0
ID		 2166 ceph_encode_64(&p, msg->con->peer_features);
2167 } else {
2168 struct {
2169 char spgid[CEPH_ENCODING_START_BLK_LEN +
2170 CEPH_PGID_ENCODING_LEN + 1];
2171 __le32 hash;
2172 __le32 epoch;
2173 __le32 flags;
2174 char reqid[CEPH_ENCODING_START_BLK_LEN +
2175 sizeof(struct ceph_osd_reqid)];
2176 char trace[sizeof(struct ceph_blkin_trace_info)];
2177 __le32 client_inc;
2178 struct ceph_timespec mtime;
2179 } __packed head;
2180 struct ceph_pg pgid;
2181 void *oloc, *oid, *tail;
2182 int oloc_len, oid_len, tail_len;
2183 int len;
2184
2185 /*
2186 * Pre-luminous OSD -- reencode v8 into v4 using @head
2187 * as a temporary buffer. Encode the raw PG; the rest
2188 * is just a matter of moving oloc, oid and tail blobs
2189 * around.
2190 */
2191 memcpy(&head, p, sizeof(head));
2192 p += sizeof(head);
2193
2194 oloc = p;
2195 p += CEPH_ENCODING_START_BLK_LEN;
2196 pgid.pool = ceph_decode_64(&p);
2197 p += 4 + 4; /* preferred, key len */
2198 len = ceph_decode_32(&p);
2199 p += len; /* nspace */
2200 oloc_len = p - oloc;
2201
2202 oid = p;
2203 len = ceph_decode_32(&p);
2204 p += len;
2205 oid_len = p - oid;
2206
2207 tail = p;
986e8989 2208 tail_len = partial_end - p;
8cb441c0
ID		 2209
2210 p = msg->front.iov_base;
2211 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2212 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2213 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2214 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2215
2216 /* reassert_version */
2217 memset(p, 0, sizeof(struct ceph_eversion));
2218 p += sizeof(struct ceph_eversion);
2219
2220 BUG_ON(p >= oloc);
2221 memmove(p, oloc, oloc_len);
2222 p += oloc_len;
2223
2224 pgid.seed = le32_to_cpu(head.hash);
2225 encode_pgid(&p, &pgid); /* raw pg */
2226
2227 BUG_ON(p >= oid);
2228 memmove(p, oid, oid_len);
2229 p += oid_len;
2230
2231 /* tail -- ops, snapid, snapc, retry_attempt */
2232 BUG_ON(p >= tail);
2233 memmove(p, tail, tail_len);
2234 p += tail_len;
2235
2236 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2237 }
2238
2239 BUG_ON(p > end);
2240 msg->front.iov_len = p - msg->front.iov_base;
2241 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2242
2243 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2244 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2245 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2246 le16_to_cpu(msg->hdr.version));
bb873b53
ID		 2247}
2248
2249/*
2250 * @req has to be assigned a tid and registered.
2251 */
2252static void send_request(struct ceph_osd_request *req)
2253{
2254 struct ceph_osd *osd = req->r_osd;
2255
5aea3dcd 2256 verify_osd_locked(osd);
bb873b53
ID		 2257 WARN_ON(osd->o_osd != req->r_t.osd);
2258
a02a946d
ID		 2259 /* backoff? */
2260 if (should_plug_request(req))
2261 return;
2262
5aea3dcd
ID		 2263 /*
2264 * We may have a previously queued request message hanging
2265 * around. Cancel it to avoid corrupting the msgr.
2266 */
2267 if (req->r_sent)
2268 ceph_msg_revoke(req->r_request);
2269
bb873b53
ID		 2270 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2271 if (req->r_attempts)
2272 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2273 else
2274 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2275
8cb441c0 2276 encode_request_partial(req, req->r_request);
bb873b53 2277
04c7d789 2278 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
bb873b53 2279 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
dc98ff72 2280 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
04c7d789
ID		 2281 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2282 req->r_attempts);
bb873b53
ID		 2283
2284 req->r_t.paused = false;
2285 req->r_stamp = jiffies;
2286 req->r_attempts++;
2287
2288 req->r_sent = osd->o_incarnation;
2289 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2290 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
f24e9980
SW		 2291}
2292
42c1b124
ID		 2293static void maybe_request_map(struct ceph_osd_client *osdc)
2294{
2295 bool continuous = false;
2296
5aea3dcd 2297 verify_osdc_locked(osdc);
42c1b124
ID		 2298 WARN_ON(!osdc->osdmap->epoch);
2299
b7ec35b3
ID		 2300 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2301 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2302 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
42c1b124
ID		 2303 dout("%s osdc %p continuous\n", __func__, osdc);
2304 continuous = true;
2305 } else {
2306 dout("%s osdc %p onetime\n", __func__, osdc);
2307 }
2308
2309 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2310 osdc->osdmap->epoch + 1, continuous))
2311 ceph_monc_renew_subs(&osdc->client->monc);
2312}
2313
a1f4020a 2314static void complete_request(struct ceph_osd_request *req, int err);
4609245e
ID		 2315static void send_map_check(struct ceph_osd_request *req);
2316
5aea3dcd 2317static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
0bbfdfe8 2318{
5aea3dcd
ID		 2319 struct ceph_osd_client *osdc = req->r_osdc;
2320 struct ceph_osd *osd;
4609245e 2321 enum calc_target_result ct_res;
66850df5 2322 int err = 0;
5aea3dcd
ID		 2323 bool need_send = false;
2324 bool promoted = false;
0bbfdfe8 2325
b18b9550 2326 WARN_ON(req->r_tid);
5aea3dcd
ID		 2327 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2328
2329again:
8edf84ba 2330 ct_res = calc_target(osdc, &req->r_t, false);
4609245e
ID		 2331 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2332 goto promote;
2333
5aea3dcd
ID		 2334 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2335 if (IS_ERR(osd)) {
2336 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2337 goto promote;
0bbfdfe8
ID		 2338 }
2339
66850df5
ID		 2340 if (osdc->abort_err) {
2341 dout("req %p abort_err %d\n", req, osdc->abort_err);
2342 err = osdc->abort_err;
2343 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
58eb7932
JL		 2344 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2345 osdc->epoch_barrier);
2346 req->r_t.paused = true;
2347 maybe_request_map(osdc);
2348 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2349 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
5aea3dcd
ID		 2350 dout("req %p pausewr\n", req);
2351 req->r_t.paused = true;
2352 maybe_request_map(osdc);
2353 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
b7ec35b3 2354 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
5aea3dcd
ID		 2355 dout("req %p pauserd\n", req);
2356 req->r_t.paused = true;
2357 maybe_request_map(osdc);
2358 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2359 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2360 CEPH_OSD_FLAG_FULL_FORCE)) &&
b7ec35b3 2361 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
5aea3dcd
ID		 2362 pool_full(osdc, req->r_t.base_oloc.pool))) {
2363 dout("req %p full/pool_full\n", req);
02b2f549 2364 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
66850df5 2365 err = -ENOSPC;
29e87820 2366 } else {
dc9b0dc4
ID		 2367 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL))
2368 pr_warn_ratelimited("cluster is full (osdmap FULL)\n");
2369 else
2370 pr_warn_ratelimited("pool %lld is full or reached quota\n",
2371 req->r_t.base_oloc.pool);
29e87820
ID		 2372 req->r_t.paused = true;
2373 maybe_request_map(osdc);
2374 }
5aea3dcd
ID		 2375 } else if (!osd_homeless(osd)) {
2376 need_send = true;
0bbfdfe8 2377 } else {
5aea3dcd 2378 maybe_request_map(osdc);
0bbfdfe8
ID		 2379 }
2380
5aea3dcd
ID		 2381 mutex_lock(&osd->lock);
2382 /*
2383 * Assign the tid atomically with send_request() to protect
2384 * multiple writes to the same object from racing with each
2385 * other, resulting in out of order ops on the OSDs.
2386 */
2387 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2388 link_request(osd, req);
2389 if (need_send)
2390 send_request(req);
66850df5
ID		 2391 else if (err)
2392 complete_request(req, err);
5aea3dcd
ID		 2393 mutex_unlock(&osd->lock);
2394
6001567c 2395 if (!err && ct_res == CALC_TARGET_POOL_DNE)
4609245e
ID		 2396 send_map_check(req);
2397
5aea3dcd
ID		 2398 if (promoted)
2399 downgrade_write(&osdc->lock);
2400 return;
2401
2402promote:
2403 up_read(&osdc->lock);
2404 down_write(&osdc->lock);
2405 wrlocked = true;
2406 promoted = true;
2407 goto again;
2408}
2409
2410static void account_request(struct ceph_osd_request *req)
2411{
54ea0046 2412 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
b18b9550 2413 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
5aea3dcd 2414
b18b9550 2415 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
22d2cfdf 2416 atomic_inc(&req->r_osdc->num_requests);
7cc5e38f
ID		 2417
2418 req->r_start_stamp = jiffies;
97e27aaa 2419 req->r_start_latency = ktime_get();
5aea3dcd
ID		 2420}
2421
2422static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2423{
2424 ceph_osdc_get_request(req);
2425 account_request(req);
2426 __submit_request(req, wrlocked);
2427}
2428
45ee2c1d 2429static void finish_request(struct ceph_osd_request *req)
5aea3dcd
ID		 2430{
2431 struct ceph_osd_client *osdc = req->r_osdc;
5aea3dcd 2432
04c7d789 2433 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
5aea3dcd
ID		 2434 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2435
97e27aaa
XL		 2436 req->r_end_latency = ktime_get();
2437
04c7d789
ID		 2438 if (req->r_osd)
2439 unlink_request(req->r_osd, req);
5aea3dcd
ID		 2440 atomic_dec(&osdc->num_requests);
2441
2442 /*
2443 * If an OSD has failed or returned and a request has been sent
2444 * twice, it's possible to get a reply and end up here while the
2445 * request message is queued for delivery. We will ignore the
2446 * reply, so not a big deal, but better to try and catch it.
2447 */
2448 ceph_msg_revoke(req->r_request);
2449 ceph_msg_revoke_incoming(req->r_reply);
2450}
2451
fe5da05e
ID		 2452static void __complete_request(struct ceph_osd_request *req)
2453{
d75f773c 2454 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
26df726b
ID		 2455 req->r_tid, req->r_callback, req->r_result);
2456
2457 if (req->r_callback)
fe5da05e 2458 req->r_callback(req);
26df726b
ID		 2459 complete_all(&req->r_completion);
2460 ceph_osdc_put_request(req);
fe5da05e
ID		 2461}
2462
88bc1922
ID		 2463static void complete_request_workfn(struct work_struct *work)
2464{
2465 struct ceph_osd_request *req =
2466 container_of(work, struct ceph_osd_request, r_complete_work);
2467
2468 __complete_request(req);
fe5da05e
ID		 2469}
2470
4609245e 2471/*
b18b9550 2472 * This is open-coded in handle_reply().
4609245e
ID		 2473 */
2474static void complete_request(struct ceph_osd_request *req, int err)
2475{
2476 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2477
2478 req->r_result = err;
45ee2c1d 2479 finish_request(req);
88bc1922
ID		 2480
2481 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2482 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
4609245e
ID		 2483}
2484
2485static void cancel_map_check(struct ceph_osd_request *req)
2486{
2487 struct ceph_osd_client *osdc = req->r_osdc;
2488 struct ceph_osd_request *lookup_req;
2489
2490 verify_osdc_wrlocked(osdc);
2491
2492 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2493 if (!lookup_req)
2494 return;
2495
2496 WARN_ON(lookup_req != req);
2497 erase_request_mc(&osdc->map_checks, req);
2498 ceph_osdc_put_request(req);
2499}
2500
5aea3dcd
ID		 2501static void cancel_request(struct ceph_osd_request *req)
2502{
2503 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2504
4609245e 2505 cancel_map_check(req);
45ee2c1d 2506 finish_request(req);
b18b9550 2507 complete_all(&req->r_completion);
c297eb42 2508 ceph_osdc_put_request(req);
5aea3dcd
ID		 2509}
2510
7cc5e38f
ID		 2511static void abort_request(struct ceph_osd_request *req, int err)
2512{
2513 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2514
2515 cancel_map_check(req);
2516 complete_request(req, err);
2517}
2518
66850df5
ID		 2519static int abort_fn(struct ceph_osd_request *req, void *arg)
2520{
2521 int err = *(int *)arg;
2522
2523 abort_request(req, err);
2524 return 0; /* continue iteration */
2525}
2526
2527/*
2528 * Abort all in-flight requests with @err and arrange for all future
2529 * requests to be failed immediately.
2530 */
2531void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2532{
2533 dout("%s osdc %p err %d\n", __func__, osdc, err);
2534 down_write(&osdc->lock);
2535 for_each_request(osdc, abort_fn, &err);
2536 osdc->abort_err = err;
2537 up_write(&osdc->lock);
2538}
2539EXPORT_SYMBOL(ceph_osdc_abort_requests);
2540
2cef0ba8
YZ		 2541void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc)
2542{
2543 down_write(&osdc->lock);
2544 osdc->abort_err = 0;
2545 up_write(&osdc->lock);
2546}
2547EXPORT_SYMBOL(ceph_osdc_clear_abort_err);
2548
58eb7932
JL		 2549static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2550{
2551 if (likely(eb > osdc->epoch_barrier)) {
2552 dout("updating epoch_barrier from %u to %u\n",
2553 osdc->epoch_barrier, eb);
2554 osdc->epoch_barrier = eb;
2555 /* Request map if we're not to the barrier yet */
2556 if (eb > osdc->osdmap->epoch)
2557 maybe_request_map(osdc);
2558 }
2559}
2560
2561void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2562{
2563 down_read(&osdc->lock);
2564 if (unlikely(eb > osdc->epoch_barrier)) {
2565 up_read(&osdc->lock);
2566 down_write(&osdc->lock);
2567 update_epoch_barrier(osdc, eb);
2568 up_write(&osdc->lock);
2569 } else {
2570 up_read(&osdc->lock);
2571 }
2572}
2573EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2574
4eea0fef
ID		 2575/*
2576 * We can end up releasing caps as a result of abort_request().
2577 * In that case, we probably want to ensure that the cap release message
2578 * has an updated epoch barrier in it, so set the epoch barrier prior to
2579 * aborting the first request.
2580 */
2581static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2582{
2583 struct ceph_osd_client *osdc = req->r_osdc;
2584 bool *victims = arg;
2585
c843d13c 2586 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
4eea0fef 2587 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
690f951d 2588 pool_full(osdc, req->r_t.base_oloc.pool))) {
4eea0fef
ID		 2589 if (!*victims) {
2590 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2591 *victims = true;
2592 }
2593 abort_request(req, -ENOSPC);
2594 }
2595
2596 return 0; /* continue iteration */
2597}
2598
fc36d0a4
JL		 2599/*
2600 * Drop all pending requests that are stalled waiting on a full condition to
58eb7932
JL		 2601 * clear, and complete them with ENOSPC as the return code. Set the
2602 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2603 * cancelled.
fc36d0a4
JL		 2604 */
2605static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2606{
58eb7932 2607 bool victims = false;
fc36d0a4 2608
02b2f549 2609 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
c843d13c 2610 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
4eea0fef 2611 for_each_request(osdc, abort_on_full_fn, &victims);
fc36d0a4
JL		 2612}
2613
4609245e
ID		 2614static void check_pool_dne(struct ceph_osd_request *req)
2615{
2616 struct ceph_osd_client *osdc = req->r_osdc;
2617 struct ceph_osdmap *map = osdc->osdmap;
2618
2619 verify_osdc_wrlocked(osdc);
2620 WARN_ON(!map->epoch);
2621
2622 if (req->r_attempts) {
2623 /*
2624 * We sent a request earlier, which means that
2625 * previously the pool existed, and now it does not
2626 * (i.e., it was deleted).
2627 */
2628 req->r_map_dne_bound = map->epoch;
2629 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2630 req->r_tid);
2631 } else {
2632 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2633 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2634 }
2635
2636 if (req->r_map_dne_bound) {
2637 if (map->epoch >= req->r_map_dne_bound) {
2638 /* we had a new enough map */
2639 pr_info_ratelimited("tid %llu pool does not exist\n",
2640 req->r_tid);
2641 complete_request(req, -ENOENT);
2642 }
2643 } else {
2644 send_map_check(req);
2645 }
2646}
2647
2648static void map_check_cb(struct ceph_mon_generic_request *greq)
2649{
2650 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2651 struct ceph_osd_request *req;
2652 u64 tid = greq->private_data;
2653
2654 WARN_ON(greq->result || !greq->u.newest);
2655
2656 down_write(&osdc->lock);
2657 req = lookup_request_mc(&osdc->map_checks, tid);
2658 if (!req) {
2659 dout("%s tid %llu dne\n", __func__, tid);
2660 goto out_unlock;
2661 }
2662
2663 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2664 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2665 if (!req->r_map_dne_bound)
2666 req->r_map_dne_bound = greq->u.newest;
2667 erase_request_mc(&osdc->map_checks, req);
2668 check_pool_dne(req);
2669
2670 ceph_osdc_put_request(req);
2671out_unlock:
2672 up_write(&osdc->lock);
2673}
2674
2675static void send_map_check(struct ceph_osd_request *req)
2676{
2677 struct ceph_osd_client *osdc = req->r_osdc;
2678 struct ceph_osd_request *lookup_req;
2679 int ret;
2680
2681 verify_osdc_wrlocked(osdc);
2682
2683 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2684 if (lookup_req) {
2685 WARN_ON(lookup_req != req);
2686 return;
2687 }
2688
2689 ceph_osdc_get_request(req);
2690 insert_request_mc(&osdc->map_checks, req);
2691 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2692 map_check_cb, req->r_tid);
2693 WARN_ON(ret);
2694}
2695
922dab61
ID		 2696/*
2697 * lingering requests, watch/notify v2 infrastructure
2698 */
2699static void linger_release(struct kref *kref)
2700{
2701 struct ceph_osd_linger_request *lreq =
2702 container_of(kref, struct ceph_osd_linger_request, kref);
2703
2704 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2705 lreq->reg_req, lreq->ping_req);
2706 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2707 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
4609245e 2708 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
922dab61 2709 WARN_ON(!list_empty(&lreq->scan_item));
b07d3c4b 2710 WARN_ON(!list_empty(&lreq->pending_lworks));
922dab61
ID		 2711 WARN_ON(lreq->osd);
2712
75dbb685
ID		 2713 if (lreq->request_pl)
2714 ceph_pagelist_release(lreq->request_pl);
2715 if (lreq->notify_id_pages)
2716 ceph_release_page_vector(lreq->notify_id_pages, 1);
2717
2718 ceph_osdc_put_request(lreq->reg_req);
2719 ceph_osdc_put_request(lreq->ping_req);
922dab61
ID		 2720 target_destroy(&lreq->t);
2721 kfree(lreq);
2722}
2723
2724static void linger_put(struct ceph_osd_linger_request *lreq)
2725{
2726 if (lreq)
2727 kref_put(&lreq->kref, linger_release);
2728}
2729
2730static struct ceph_osd_linger_request *
2731linger_get(struct ceph_osd_linger_request *lreq)
2732{
2733 kref_get(&lreq->kref);
2734 return lreq;
2735}
2736
2737static struct ceph_osd_linger_request *
2738linger_alloc(struct ceph_osd_client *osdc)
2739{
2740 struct ceph_osd_linger_request *lreq;
2741
2742 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2743 if (!lreq)
2744 return NULL;
2745
2746 kref_init(&lreq->kref);
2747 mutex_init(&lreq->lock);
2748 RB_CLEAR_NODE(&lreq->node);
2749 RB_CLEAR_NODE(&lreq->osdc_node);
4609245e 2750 RB_CLEAR_NODE(&lreq->mc_node);
922dab61 2751 INIT_LIST_HEAD(&lreq->scan_item);
b07d3c4b 2752 INIT_LIST_HEAD(&lreq->pending_lworks);
922dab61 2753 init_completion(&lreq->reg_commit_wait);
19079203 2754 init_completion(&lreq->notify_finish_wait);
922dab61
ID		 2755
2756 lreq->osdc = osdc;
2757 target_init(&lreq->t);
2758
2759 dout("%s lreq %p\n", __func__, lreq);
2760 return lreq;
2761}
2762
2763DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2764DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
4609245e 2765DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
922dab61
ID		 2766
2767/*
2768 * Create linger request <-> OSD session relation.
2769 *
2770 * @lreq has to be registered, @osd may be homeless.
2771 */
2772static void link_linger(struct ceph_osd *osd,
2773 struct ceph_osd_linger_request *lreq)
2774{
2775 verify_osd_locked(osd);
2776 WARN_ON(!lreq->linger_id || lreq->osd);
2777 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2778 osd->o_osd, lreq, lreq->linger_id);
2779
2780 if (!osd_homeless(osd))
2781 __remove_osd_from_lru(osd);
2782 else
2783 atomic_inc(&osd->o_osdc->num_homeless);
2784
2785 get_osd(osd);
2786 insert_linger(&osd->o_linger_requests, lreq);
2787 lreq->osd = osd;
2788}
2789
2790static void unlink_linger(struct ceph_osd *osd,
2791 struct ceph_osd_linger_request *lreq)
2792{
2793 verify_osd_locked(osd);
2794 WARN_ON(lreq->osd != osd);
2795 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2796 osd->o_osd, lreq, lreq->linger_id);
2797
2798 lreq->osd = NULL;
2799 erase_linger(&osd->o_linger_requests, lreq);
2800 put_osd(osd);
2801
2802 if (!osd_homeless(osd))
2803 maybe_move_osd_to_lru(osd);
2804 else
2805 atomic_dec(&osd->o_osdc->num_homeless);
2806}
2807
2808static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2809{
2810 verify_osdc_locked(lreq->osdc);
2811
2812 return !RB_EMPTY_NODE(&lreq->osdc_node);
2813}
2814
2815static bool linger_registered(struct ceph_osd_linger_request *lreq)
2816{
2817 struct ceph_osd_client *osdc = lreq->osdc;
2818 bool registered;
2819
2820 down_read(&osdc->lock);
2821 registered = __linger_registered(lreq);
2822 up_read(&osdc->lock);
2823
2824 return registered;
2825}
2826
2827static void linger_register(struct ceph_osd_linger_request *lreq)
2828{
2829 struct ceph_osd_client *osdc = lreq->osdc;
2830
2831 verify_osdc_wrlocked(osdc);
2832 WARN_ON(lreq->linger_id);
2833
2834 linger_get(lreq);
2835 lreq->linger_id = ++osdc->last_linger_id;
2836 insert_linger_osdc(&osdc->linger_requests, lreq);
2837}
2838
2839static void linger_unregister(struct ceph_osd_linger_request *lreq)
2840{
2841 struct ceph_osd_client *osdc = lreq->osdc;
2842
2843 verify_osdc_wrlocked(osdc);
2844
2845 erase_linger_osdc(&osdc->linger_requests, lreq);
2846 linger_put(lreq);
2847}
2848
2849static void cancel_linger_request(struct ceph_osd_request *req)
2850{
2851 struct ceph_osd_linger_request *lreq = req->r_priv;
2852
2853 WARN_ON(!req->r_linger);
2854 cancel_request(req);
2855 linger_put(lreq);
2856}
2857
2858struct linger_work {
2859 struct work_struct work;
2860 struct ceph_osd_linger_request *lreq;
b07d3c4b
ID		 2861 struct list_head pending_item;
2862 unsigned long queued_stamp;
922dab61
ID		 2863
2864 union {
2865 struct {
2866 u64 notify_id;
2867 u64 notifier_id;
2868 void *payload; /* points into @msg front */
2869 size_t payload_len;
2870
2871 struct ceph_msg *msg; /* for ceph_msg_put() */
2872 } notify;
2873 struct {
2874 int err;
2875 } error;
2876 };
2877};
2878
2879static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2880 work_func_t workfn)
2881{
2882 struct linger_work *lwork;
2883
2884 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2885 if (!lwork)
2886 return NULL;
2887
2888 INIT_WORK(&lwork->work, workfn);
b07d3c4b 2889 INIT_LIST_HEAD(&lwork->pending_item);
922dab61
ID		 2890 lwork->lreq = linger_get(lreq);
2891
2892 return lwork;
2893}
2894
2895static void lwork_free(struct linger_work *lwork)
2896{
2897 struct ceph_osd_linger_request *lreq = lwork->lreq;
2898
b07d3c4b
ID		 2899 mutex_lock(&lreq->lock);
2900 list_del(&lwork->pending_item);
2901 mutex_unlock(&lreq->lock);
2902
922dab61
ID		 2903 linger_put(lreq);
2904 kfree(lwork);
2905}
2906
2907static void lwork_queue(struct linger_work *lwork)
2908{
2909 struct ceph_osd_linger_request *lreq = lwork->lreq;
2910 struct ceph_osd_client *osdc = lreq->osdc;
2911
2912 verify_lreq_locked(lreq);
b07d3c4b
ID		 2913 WARN_ON(!list_empty(&lwork->pending_item));
2914
2915 lwork->queued_stamp = jiffies;
2916 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
922dab61
ID		 2917 queue_work(osdc->notify_wq, &lwork->work);
2918}
2919
2920static void do_watch_notify(struct work_struct *w)
2921{
2922 struct linger_work *lwork = container_of(w, struct linger_work, work);
2923 struct ceph_osd_linger_request *lreq = lwork->lreq;
2924
2925 if (!linger_registered(lreq)) {
2926 dout("%s lreq %p not registered\n", __func__, lreq);
2927 goto out;
2928 }
2929
19079203 2930 WARN_ON(!lreq->is_watch);
922dab61
ID		 2931 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2932 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2933 lwork->notify.payload_len);
2934 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2935 lwork->notify.notifier_id, lwork->notify.payload,
2936 lwork->notify.payload_len);
2937
2938out:
2939 ceph_msg_put(lwork->notify.msg);
2940 lwork_free(lwork);
2941}
2942
2943static void do_watch_error(struct work_struct *w)
2944{
2945 struct linger_work *lwork = container_of(w, struct linger_work, work);
2946 struct ceph_osd_linger_request *lreq = lwork->lreq;
2947
2948 if (!linger_registered(lreq)) {
2949 dout("%s lreq %p not registered\n", __func__, lreq);
2950 goto out;
2951 }
2952
2953 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2954 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2955
2956out:
2957 lwork_free(lwork);
2958}
2959
2960static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2961{
2962 struct linger_work *lwork;
2963
2964 lwork = lwork_alloc(lreq, do_watch_error);
2965 if (!lwork) {
2966 pr_err("failed to allocate error-lwork\n");
2967 return;
2968 }
2969
2970 lwork->error.err = lreq->last_error;
2971 lwork_queue(lwork);
2972}
2973
2974static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2975 int result)
2976{
2977 if (!completion_done(&lreq->reg_commit_wait)) {
2978 lreq->reg_commit_error = (result <= 0 ? result : 0);
2979 complete_all(&lreq->reg_commit_wait);
2980 }
2981}
2982
2983static void linger_commit_cb(struct ceph_osd_request *req)
2984{
2985 struct ceph_osd_linger_request *lreq = req->r_priv;
2986
2987 mutex_lock(&lreq->lock);
75dbb685
ID		 2988 if (req != lreq->reg_req) {
2989 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
2990 __func__, lreq, lreq->linger_id, req, lreq->reg_req);
2991 goto out;
2992 }
2993
922dab61
ID		 2994 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2995 lreq->linger_id, req->r_result);
922dab61
ID		 2996 linger_reg_commit_complete(lreq, req->r_result);
2997 lreq->committed = true;
2998
19079203
ID		 2999 if (!lreq->is_watch) {
3000 struct ceph_osd_data *osd_data =
3001 osd_req_op_data(req, 0, notify, response_data);
3002 void *p = page_address(osd_data->pages[0]);
3003
3004 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
3005 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
3006
3007 /* make note of the notify_id */
3008 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
3009 lreq->notify_id = ceph_decode_64(&p);
3010 dout("lreq %p notify_id %llu\n", lreq,
3011 lreq->notify_id);
3012 } else {
3013 dout("lreq %p no notify_id\n", lreq);
3014 }
3015 }
3016
75dbb685 3017out:
922dab61
ID		 3018 mutex_unlock(&lreq->lock);
3019 linger_put(lreq);
3020}
3021
3022static int normalize_watch_error(int err)
3023{
3024 /*
3025 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
3026 * notification and a failure to reconnect because we raced with
3027 * the delete appear the same to the user.
3028 */
3029 if (err == -ENOENT)
3030 err = -ENOTCONN;
3031
3032 return err;
3033}
3034
3035static void linger_reconnect_cb(struct ceph_osd_request *req)
3036{
3037 struct ceph_osd_linger_request *lreq = req->r_priv;
3038
3039 mutex_lock(&lreq->lock);
75dbb685
ID		 3040 if (req != lreq->reg_req) {
3041 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
3042 __func__, lreq, lreq->linger_id, req, lreq->reg_req);
3043 goto out;
3044 }
3045
922dab61
ID		 3046 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
3047 lreq, lreq->linger_id, req->r_result, lreq->last_error);
3048 if (req->r_result < 0) {
3049 if (!lreq->last_error) {
3050 lreq->last_error = normalize_watch_error(req->r_result);
3051 queue_watch_error(lreq);
3052 }
3053 }
3054
75dbb685 3055out:
922dab61
ID		 3056 mutex_unlock(&lreq->lock);
3057 linger_put(lreq);
3058}
3059
3060static void send_linger(struct ceph_osd_linger_request *lreq)
3061{
75dbb685
ID		 3062 struct ceph_osd_client *osdc = lreq->osdc;
3063 struct ceph_osd_request *req;
3064 int ret;
922dab61 3065
75dbb685
ID		 3066 verify_osdc_wrlocked(osdc);
3067 mutex_lock(&lreq->lock);
922dab61
ID		 3068 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3069
75dbb685
ID		 3070 if (lreq->reg_req) {
3071 if (lreq->reg_req->r_osd)
3072 cancel_linger_request(lreq->reg_req);
3073 ceph_osdc_put_request(lreq->reg_req);
3074 }
3075
3076 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO);
3077 BUG_ON(!req);
922dab61 3078
5133ba8f 3079 target_copy(&req->r_t, &lreq->t);
922dab61
ID		 3080 req->r_mtime = lreq->mtime;
3081
19079203 3082 if (lreq->is_watch && lreq->committed) {
75dbb685
ID		 3083 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_RECONNECT,
3084 lreq->linger_id, ++lreq->register_gen);
922dab61 3085 dout("lreq %p reconnect register_gen %u\n", lreq,
75dbb685 3086 req->r_ops[0].watch.gen);
922dab61
ID		 3087 req->r_callback = linger_reconnect_cb;
3088 } else {
75dbb685
ID		 3089 if (lreq->is_watch) {
3090 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_WATCH,
3091 lreq->linger_id, 0);
3092 } else {
19079203 3093 lreq->notify_id = 0;
75dbb685
ID		 3094
3095 refcount_inc(&lreq->request_pl->refcnt);
3096 osd_req_op_notify_init(req, 0, lreq->linger_id,
3097 lreq->request_pl);
3098 ceph_osd_data_pages_init(
3099 osd_req_op_data(req, 0, notify, response_data),
3100 lreq->notify_id_pages, PAGE_SIZE, 0, false, false);
3101 }
922dab61
ID		 3102 dout("lreq %p register\n", lreq);
3103 req->r_callback = linger_commit_cb;
3104 }
75dbb685
ID		 3105
3106 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3107 BUG_ON(ret);
922dab61
ID		 3108
3109 req->r_priv = linger_get(lreq);
3110 req->r_linger = true;
75dbb685
ID		 3111 lreq->reg_req = req;
3112 mutex_unlock(&lreq->lock);
922dab61
ID		 3113
3114 submit_request(req, true);
3115}
3116
3117static void linger_ping_cb(struct ceph_osd_request *req)
3118{
3119 struct ceph_osd_linger_request *lreq = req->r_priv;
3120
3121 mutex_lock(&lreq->lock);
75dbb685
ID		 3122 if (req != lreq->ping_req) {
3123 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
3124 __func__, lreq, lreq->linger_id, req, lreq->ping_req);
3125 goto out;
3126 }
3127
922dab61
ID		 3128 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3129 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3130 lreq->last_error);
3131 if (lreq->register_gen == req->r_ops[0].watch.gen) {
b07d3c4b
ID		 3132 if (!req->r_result) {
3133 lreq->watch_valid_thru = lreq->ping_sent;
3134 } else if (!lreq->last_error) {
922dab61
ID		 3135 lreq->last_error = normalize_watch_error(req->r_result);
3136 queue_watch_error(lreq);
3137 }
3138 } else {
3139 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3140 lreq->register_gen, req->r_ops[0].watch.gen);
3141 }
3142
75dbb685 3143out:
922dab61
ID		 3144 mutex_unlock(&lreq->lock);
3145 linger_put(lreq);
3146}
3147
3148static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3149{
3150 struct ceph_osd_client *osdc = lreq->osdc;
75dbb685
ID		 3151 struct ceph_osd_request *req;
3152 int ret;
922dab61 3153
b7ec35b3 3154 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
922dab61
ID		 3155 dout("%s PAUSERD\n", __func__);
3156 return;
3157 }
3158
3159 lreq->ping_sent = jiffies;
3160 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3161 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3162 lreq->register_gen);
3163
75dbb685
ID		 3164 if (lreq->ping_req) {
3165 if (lreq->ping_req->r_osd)
3166 cancel_linger_request(lreq->ping_req);
3167 ceph_osdc_put_request(lreq->ping_req);
3168 }
922dab61 3169
75dbb685
ID		 3170 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO);
3171 BUG_ON(!req);
922dab61 3172
75dbb685
ID		 3173 target_copy(&req->r_t, &lreq->t);
3174 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_PING, lreq->linger_id,
3175 lreq->register_gen);
922dab61 3176 req->r_callback = linger_ping_cb;
75dbb685
ID		 3177
3178 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3179 BUG_ON(ret);
3180
922dab61
ID		 3181 req->r_priv = linger_get(lreq);
3182 req->r_linger = true;
75dbb685 3183 lreq->ping_req = req;
922dab61
ID		 3184
3185 ceph_osdc_get_request(req);
3186 account_request(req);
3187 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3188 link_request(lreq->osd, req);
3189 send_request(req);
3190}
3191
3192static void linger_submit(struct ceph_osd_linger_request *lreq)
3193{
3194 struct ceph_osd_client *osdc = lreq->osdc;
3195 struct ceph_osd *osd;
3196
81c65213
ID		 3197 down_write(&osdc->lock);
3198 linger_register(lreq);
81c65213 3199
8edf84ba 3200 calc_target(osdc, &lreq->t, false);
922dab61
ID		 3201 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3202 link_linger(osd, lreq);
3203
3204 send_linger(lreq);
81c65213 3205 up_write(&osdc->lock);
922dab61
ID		 3206}
3207
4609245e
ID		 3208static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3209{
3210 struct ceph_osd_client *osdc = lreq->osdc;
3211 struct ceph_osd_linger_request *lookup_lreq;
3212
3213 verify_osdc_wrlocked(osdc);
3214
3215 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3216 lreq->linger_id);
3217 if (!lookup_lreq)
3218 return;
3219
3220 WARN_ON(lookup_lreq != lreq);
3221 erase_linger_mc(&osdc->linger_map_checks, lreq);
3222 linger_put(lreq);
3223}
3224
922dab61
ID		 3225/*
3226 * @lreq has to be both registered and linked.
3227 */
3228static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3229{
75dbb685 3230 if (lreq->ping_req && lreq->ping_req->r_osd)
922dab61 3231 cancel_linger_request(lreq->ping_req);
75dbb685 3232 if (lreq->reg_req && lreq->reg_req->r_osd)
922dab61 3233 cancel_linger_request(lreq->reg_req);
4609245e 3234 cancel_linger_map_check(lreq);
922dab61
ID		 3235 unlink_linger(lreq->osd, lreq);
3236 linger_unregister(lreq);
3237}
3238
3239static void linger_cancel(struct ceph_osd_linger_request *lreq)
3240{
3241 struct ceph_osd_client *osdc = lreq->osdc;
3242
3243 down_write(&osdc->lock);
3244 if (__linger_registered(lreq))
3245 __linger_cancel(lreq);
3246 up_write(&osdc->lock);
3247}
3248
4609245e
ID		 3249static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3250
3251static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3252{
3253 struct ceph_osd_client *osdc = lreq->osdc;
3254 struct ceph_osdmap *map = osdc->osdmap;
3255
3256 verify_osdc_wrlocked(osdc);
3257 WARN_ON(!map->epoch);
3258
3259 if (lreq->register_gen) {
3260 lreq->map_dne_bound = map->epoch;
3261 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3262 lreq, lreq->linger_id);
3263 } else {
3264 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3265 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3266 map->epoch);
3267 }
3268
3269 if (lreq->map_dne_bound) {
3270 if (map->epoch >= lreq->map_dne_bound) {
3271 /* we had a new enough map */
3272 pr_info("linger_id %llu pool does not exist\n",
3273 lreq->linger_id);
3274 linger_reg_commit_complete(lreq, -ENOENT);
3275 __linger_cancel(lreq);
3276 }
3277 } else {
3278 send_linger_map_check(lreq);
3279 }
3280}
3281
3282static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3283{
3284 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3285 struct ceph_osd_linger_request *lreq;
3286 u64 linger_id = greq->private_data;
3287
3288 WARN_ON(greq->result || !greq->u.newest);
3289
3290 down_write(&osdc->lock);
3291 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3292 if (!lreq) {
3293 dout("%s linger_id %llu dne\n", __func__, linger_id);
3294 goto out_unlock;
3295 }
3296
3297 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3298 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3299 greq->u.newest);
3300 if (!lreq->map_dne_bound)
3301 lreq->map_dne_bound = greq->u.newest;
3302 erase_linger_mc(&osdc->linger_map_checks, lreq);
3303 check_linger_pool_dne(lreq);
3304
3305 linger_put(lreq);
3306out_unlock:
3307 up_write(&osdc->lock);
3308}
3309
3310static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3311{
3312 struct ceph_osd_client *osdc = lreq->osdc;
3313 struct ceph_osd_linger_request *lookup_lreq;
3314 int ret;
3315
3316 verify_osdc_wrlocked(osdc);
3317
3318 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3319 lreq->linger_id);
3320 if (lookup_lreq) {
3321 WARN_ON(lookup_lreq != lreq);
3322 return;
3323 }
3324
3325 linger_get(lreq);
3326 insert_linger_mc(&osdc->linger_map_checks, lreq);
3327 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3328 linger_map_check_cb, lreq->linger_id);
3329 WARN_ON(ret);
3330}
3331
922dab61
ID		 3332static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3333{
3334 int ret;
3335
3336 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3337 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3338 return ret ?: lreq->reg_commit_error;
3339}
3340
19079203
ID		 3341static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3342{
3343 int ret;
3344
3345 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3346 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3347 return ret ?: lreq->notify_finish_error;
3348}
3349
f24e9980 3350/*
fbca9635
ID		 3351 * Timeout callback, called every N seconds. When 1 or more OSD
3352 * requests has been active for more than N seconds, we send a keepalive
3353 * (tag + timestamp) to its OSD to ensure any communications channel
3354 * reset is detected.
f24e9980
SW		 3355 */
3356static void handle_timeout(struct work_struct *work)
3357{
3358 struct ceph_osd_client *osdc =
3359 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 3360 struct ceph_options *opts = osdc->client->options;
5aea3dcd 3361 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
7cc5e38f 3362 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
5aea3dcd
ID		 3363 LIST_HEAD(slow_osds);
3364 struct rb_node *n, *p;
f24e9980 3365
5aea3dcd
ID		 3366 dout("%s osdc %p\n", __func__, osdc);
3367 down_write(&osdc->lock);
f24e9980 3368
422d2cb8
YS		 3369 /*
3370 * ping osds that are a bit slow. this ensures that if there
3371 * is a break in the TCP connection we will notice, and reopen
3372 * a connection with that osd (from the fault callback).
3373 */
5aea3dcd
ID		 3374 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3375 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3376 bool found = false;
3377
7cc5e38f 3378 for (p = rb_first(&osd->o_requests); p; ) {
5aea3dcd
ID		 3379 struct ceph_osd_request *req =
3380 rb_entry(p, struct ceph_osd_request, r_node);
3381
7cc5e38f
ID		 3382 p = rb_next(p); /* abort_request() */
3383
5aea3dcd
ID		 3384 if (time_before(req->r_stamp, cutoff)) {
3385 dout(" req %p tid %llu on osd%d is laggy\n",
3386 req, req->r_tid, osd->o_osd);
3387 found = true;
3388 }
7cc5e38f
ID		 3389 if (opts->osd_request_timeout &&
3390 time_before(req->r_start_stamp, expiry_cutoff)) {
3391 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3392 req->r_tid, osd->o_osd);
3393 abort_request(req, -ETIMEDOUT);
3394 }
5aea3dcd 3395 }
922dab61
ID		 3396 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3397 struct ceph_osd_linger_request *lreq =
3398 rb_entry(p, struct ceph_osd_linger_request, node);
3399
3400 dout(" lreq %p linger_id %llu is served by osd%d\n",
3401 lreq, lreq->linger_id, osd->o_osd);
3402 found = true;
3403
3404 mutex_lock(&lreq->lock);
19079203 3405 if (lreq->is_watch && lreq->committed && !lreq->last_error)
922dab61
ID		 3406 send_linger_ping(lreq);
3407 mutex_unlock(&lreq->lock);
3408 }
422d2cb8 3409
5aea3dcd
ID		 3410 if (found)
3411 list_move_tail(&osd->o_keepalive_item, &slow_osds);
422d2cb8 3412 }
5aea3dcd 3413
7cc5e38f
ID		 3414 if (opts->osd_request_timeout) {
3415 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3416 struct ceph_osd_request *req =
3417 rb_entry(p, struct ceph_osd_request, r_node);
3418
3419 p = rb_next(p); /* abort_request() */
3420
3421 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3422 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3423 req->r_tid, osdc->homeless_osd.o_osd);
3424 abort_request(req, -ETIMEDOUT);
3425 }
3426 }
3427 }
3428
5aea3dcd
ID		 3429 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3430 maybe_request_map(osdc);
3431
422d2cb8 3432 while (!list_empty(&slow_osds)) {
5aea3dcd
ID		 3433 struct ceph_osd *osd = list_first_entry(&slow_osds,
3434 struct ceph_osd,
3435 o_keepalive_item);
422d2cb8 3436 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 3437 ceph_con_keepalive(&osd->o_con);
3438 }
3439
5aea3dcd 3440 up_write(&osdc->lock);
fbca9635
ID		 3441 schedule_delayed_work(&osdc->timeout_work,
3442 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 3443}
3444
f5a2041b
YS		 3445static void handle_osds_timeout(struct work_struct *work)
3446{
3447 struct ceph_osd_client *osdc =
3448 container_of(work, struct ceph_osd_client,
3449 osds_timeout_work.work);
a319bf56 3450 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 3451 struct ceph_osd *osd, *nosd;
f5a2041b 3452
42a2c09f 3453 dout("%s osdc %p\n", __func__, osdc);
5aea3dcd 3454 down_write(&osdc->lock);
42a2c09f
ID		 3455 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3456 if (time_before(jiffies, osd->lru_ttl))
3457 break;
3458
5aea3dcd 3459 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 3460 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
5aea3dcd 3461 close_osd(osd);
42a2c09f 3462 }
f5a2041b 3463
5aea3dcd 3464 up_write(&osdc->lock);
f5a2041b
YS		 3465 schedule_delayed_work(&osdc->osds_timeout_work,
3466 round_jiffies_relative(delay));
3467}
3468
205ee118
ID		 3469static int ceph_oloc_decode(void **p, void *end,
3470 struct ceph_object_locator *oloc)
3471{
3472 u8 struct_v, struct_cv;
3473 u32 len;
3474 void *struct_end;
3475 int ret = 0;
3476
3477 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3478 struct_v = ceph_decode_8(p);
3479 struct_cv = ceph_decode_8(p);
3480 if (struct_v < 3) {
3481 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3482 struct_v, struct_cv);
3483 goto e_inval;
3484 }
3485 if (struct_cv > 6) {
3486 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3487 struct_v, struct_cv);
3488 goto e_inval;
3489 }
3490 len = ceph_decode_32(p);
3491 ceph_decode_need(p, end, len, e_inval);
3492 struct_end = *p + len;
3493
3494 oloc->pool = ceph_decode_64(p);
3495 *p += 4; /* skip preferred */
3496
3497 len = ceph_decode_32(p);
3498 if (len > 0) {
3499 pr_warn("ceph_object_locator::key is set\n");
3500 goto e_inval;
3501 }
3502
3503 if (struct_v >= 5) {
cd08e0a2
YZ		 3504 bool changed = false;
3505
205ee118
ID		 3506 len = ceph_decode_32(p);
3507 if (len > 0) {
30c156d9 3508 ceph_decode_need(p, end, len, e_inval);
cd08e0a2
YZ		 3509 if (!oloc->pool_ns ||
3510 ceph_compare_string(oloc->pool_ns, *p, len))
3511 changed = true;
30c156d9 3512 *p += len;
cd08e0a2
YZ		 3513 } else {
3514 if (oloc->pool_ns)
3515 changed = true;
3516 }
3517 if (changed) {
3518 /* redirect changes namespace */
3519 pr_warn("ceph_object_locator::nspace is changed\n");
3520 goto e_inval;
205ee118
ID		 3521 }
3522 }
3523
3524 if (struct_v >= 6) {
3525 s64 hash = ceph_decode_64(p);
3526 if (hash != -1) {
3527 pr_warn("ceph_object_locator::hash is set\n");
3528 goto e_inval;
3529 }
3530 }
3531
3532 /* skip the rest */
3533 *p = struct_end;
3534out:
3535 return ret;
3536
3537e_inval:
3538 ret = -EINVAL;
3539 goto out;
3540}
3541
3542static int ceph_redirect_decode(void **p, void *end,
3543 struct ceph_request_redirect *redir)
3544{
3545 u8 struct_v, struct_cv;
3546 u32 len;
3547 void *struct_end;
3548 int ret;
3549
3550 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3551 struct_v = ceph_decode_8(p);
3552 struct_cv = ceph_decode_8(p);
3553 if (struct_cv > 1) {
3554 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3555 struct_v, struct_cv);
3556 goto e_inval;
3557 }
3558 len = ceph_decode_32(p);
3559 ceph_decode_need(p, end, len, e_inval);
3560 struct_end = *p + len;
3561
3562 ret = ceph_oloc_decode(p, end, &redir->oloc);
3563 if (ret)
3564 goto out;
3565
3566 len = ceph_decode_32(p);
3567 if (len > 0) {
3568 pr_warn("ceph_request_redirect::object_name is set\n");
3569 goto e_inval;
3570 }
3571
205ee118
ID		 3572 /* skip the rest */
3573 *p = struct_end;
3574out:
3575 return ret;
3576
3577e_inval:
3578 ret = -EINVAL;
3579 goto out;
3580}
3581
fe5da05e
ID		 3582struct MOSDOpReply {
3583 struct ceph_pg pgid;
3584 u64 flags;
3585 int result;
3586 u32 epoch;
3587 int num_ops;
3588 u32 outdata_len[CEPH_OSD_MAX_OPS];
3589 s32 rval[CEPH_OSD_MAX_OPS];
3590 int retry_attempt;
3591 struct ceph_eversion replay_version;
3592 u64 user_version;
3593 struct ceph_request_redirect redirect;
3594};
25845472 3595
fe5da05e 3596static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 3597{
fe5da05e
ID		 3598 void *p = msg->front.iov_base;
3599 void *const end = p + msg->front.iov_len;
3600 u16 version = le16_to_cpu(msg->hdr.version);
3601 struct ceph_eversion bad_replay_version;
b0b31a8f 3602 u8 decode_redir;
fe5da05e
ID		 3603 u32 len;
3604 int ret;
3605 int i;
1b83bef2 3606
fe5da05e
ID		 3607 ceph_decode_32_safe(&p, end, len, e_inval);
3608 ceph_decode_need(&p, end, len, e_inval);
3609 p += len; /* skip oid */
1b83bef2 3610
fe5da05e
ID		 3611 ret = ceph_decode_pgid(&p, end, &m->pgid);
3612 if (ret)
3613 return ret;
1b83bef2 3614
fe5da05e
ID		 3615 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3616 ceph_decode_32_safe(&p, end, m->result, e_inval);
3617 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3618 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3619 p += sizeof(bad_replay_version);
3620 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 3621
fe5da05e
ID		 3622 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3623 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3624 goto e_inval;
1b83bef2 3625
fe5da05e
ID		 3626 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3627 e_inval);
3628 for (i = 0; i < m->num_ops; i++) {
1b83bef2 3629 struct ceph_osd_op *op = p;
1b83bef2 3630
fe5da05e 3631 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 3632 p += sizeof(*op);
3633 }
1b83bef2 3634
fe5da05e
ID		 3635 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3636 for (i = 0; i < m->num_ops; i++)
3637 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 3638
fe5da05e
ID		 3639 if (version >= 5) {
3640 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3641 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3642 p += sizeof(m->replay_version);
3643 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3644 } else {
3645 m->replay_version = bad_replay_version; /* struct */
3646 m->user_version = le64_to_cpu(m->replay_version.version);
3647 }
eb845ff1 3648
fe5da05e
ID		 3649 if (version >= 6) {
3650 if (version >= 7)
3651 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 3652 else
3653 decode_redir = 1;
3654 } else {
3655 decode_redir = 0;
3656 }
3657
3658 if (decode_redir) {
fe5da05e
ID		 3659 ret = ceph_redirect_decode(&p, end, &m->redirect);
3660 if (ret)
3661 return ret;
205ee118 3662 } else {
fe5da05e 3663 ceph_oloc_init(&m->redirect.oloc);
205ee118 3664 }
f24e9980 3665
fe5da05e
ID		 3666 return 0;
3667
3668e_inval:
3669 return -EINVAL;
3670}
3671
3672/*
b18b9550
ID		 3673 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3674 * specified.
fe5da05e 3675 */
5aea3dcd 3676static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
fe5da05e 3677{
5aea3dcd 3678 struct ceph_osd_client *osdc = osd->o_osdc;
fe5da05e
ID		 3679 struct ceph_osd_request *req;
3680 struct MOSDOpReply m;
3681 u64 tid = le64_to_cpu(msg->hdr.tid);
3682 u32 data_len = 0;
fe5da05e
ID		 3683 int ret;
3684 int i;
3685
3686 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3687
5aea3dcd
ID		 3688 down_read(&osdc->lock);
3689 if (!osd_registered(osd)) {
3690 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3691 goto out_unlock_osdc;
3692 }
3693 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3694
3695 mutex_lock(&osd->lock);
3696 req = lookup_request(&osd->o_requests, tid);
fe5da05e 3697 if (!req) {
5aea3dcd
ID		 3698 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3699 goto out_unlock_session;
fe5da05e 3700 }
fe5da05e 3701
cd08e0a2 3702 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
fe5da05e 3703 ret = decode_MOSDOpReply(msg, &m);
cd08e0a2 3704 m.redirect.oloc.pool_ns = NULL;
fe5da05e
ID		 3705 if (ret) {
3706 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3707 req->r_tid, ret);
3708 ceph_msg_dump(msg);
3709 goto fail_request;
3710 }
3711 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3712 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3713 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3714 le64_to_cpu(m.replay_version.version), m.user_version);
3715
3716 if (m.retry_attempt >= 0) {
3717 if (m.retry_attempt != req->r_attempts - 1) {
3718 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3719 req, req->r_tid, m.retry_attempt,
3720 req->r_attempts - 1);
5aea3dcd 3721 goto out_unlock_session;
fe5da05e
ID		 3722 }
3723 } else {
3724 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3725 }
3726
3727 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3728 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3729 m.redirect.oloc.pool);
5aea3dcd
ID		 3730 unlink_request(osd, req);
3731 mutex_unlock(&osd->lock);
205ee118 3732
30c156d9
YZ		 3733 /*
3734 * Not ceph_oloc_copy() - changing pool_ns is not
3735 * supported.
3736 */
3737 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
890bd0f8
JL		 3738 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED |
3739 CEPH_OSD_FLAG_IGNORE_OVERLAY |
3740 CEPH_OSD_FLAG_IGNORE_CACHE;
5aea3dcd
ID		 3741 req->r_tid = 0;
3742 __submit_request(req, false);
3743 goto out_unlock_osdc;
205ee118
ID		 3744 }
3745
117d96a0
ID		 3746 if (m.result == -EAGAIN) {
3747 dout("req %p tid %llu EAGAIN\n", req, req->r_tid);
3748 unlink_request(osd, req);
3749 mutex_unlock(&osd->lock);
3750
3751 /*
3752 * The object is missing on the replica or not (yet)
3753 * readable. Clear pgid to force a resend to the primary
3754 * via legacy_change.
3755 */
3756 req->r_t.pgid.pool = 0;
3757 req->r_t.pgid.seed = 0;
3758 WARN_ON(!req->r_t.used_replica);
3759 req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS |
3760 CEPH_OSD_FLAG_LOCALIZE_READS);
3761 req->r_tid = 0;
3762 __submit_request(req, false);
3763 goto out_unlock_osdc;
3764 }
3765
fe5da05e
ID		 3766 if (m.num_ops != req->r_num_ops) {
3767 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3768 req->r_num_ops, req->r_tid);
3769 goto fail_request;
f24e9980 3770 }
fe5da05e
ID		 3771 for (i = 0; i < req->r_num_ops; i++) {
3772 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3773 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3774 req->r_ops[i].rval = m.rval[i];
3775 req->r_ops[i].outdata_len = m.outdata_len[i];
3776 data_len += m.outdata_len[i];
3777 }
3778 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3779 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3780 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3781 goto fail_request;
3782 }
b18b9550
ID		 3783 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3784 req, req->r_tid, m.result, data_len);
f24e9980 3785
b18b9550
ID		 3786 /*
3787 * Since we only ever request ONDISK, we should only ever get
3788 * one (type of) reply back.
3789 */
3790 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3791 req->r_result = m.result ?: data_len;
3792 finish_request(req);
5aea3dcd
ID		 3793 mutex_unlock(&osd->lock);
3794 up_read(&osdc->lock);
f24e9980 3795
b18b9550 3796 __complete_request(req);
f24e9980
SW		 3797 return;
3798
fe5da05e 3799fail_request:
4609245e 3800 complete_request(req, -EIO);
5aea3dcd
ID		 3801out_unlock_session:
3802 mutex_unlock(&osd->lock);
3803out_unlock_osdc:
3804 up_read(&osdc->lock);
f24e9980
SW		 3805}
3806
42c1b124
ID		 3807static void set_pool_was_full(struct ceph_osd_client *osdc)
3808{
3809 struct rb_node *n;
3810
3811 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3812 struct ceph_pg_pool_info *pi =
3813 rb_entry(n, struct ceph_pg_pool_info, node);
3814
3815 pi->was_full = __pool_full(pi);
3816 }
3817}
3818
5aea3dcd 3819static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
f24e9980 3820{
5aea3dcd 3821 struct ceph_pg_pool_info *pi;
f24e9980 3822
5aea3dcd
ID		 3823 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3824 if (!pi)
3825 return false;
f24e9980 3826
5aea3dcd 3827 return pi->was_full && !__pool_full(pi);
422d2cb8
YS		 3828}
3829
922dab61
ID		 3830static enum calc_target_result
3831recalc_linger_target(struct ceph_osd_linger_request *lreq)
3832{
3833 struct ceph_osd_client *osdc = lreq->osdc;
3834 enum calc_target_result ct_res;
3835
8edf84ba 3836 ct_res = calc_target(osdc, &lreq->t, true);
922dab61
ID		 3837 if (ct_res == CALC_TARGET_NEED_RESEND) {
3838 struct ceph_osd *osd;
3839
3840 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3841 if (osd != lreq->osd) {
3842 unlink_linger(lreq->osd, lreq);
3843 link_linger(osd, lreq);
3844 }
3845 }
3846
3847 return ct_res;
3848}
3849
422d2cb8 3850/*
5aea3dcd 3851 * Requeue requests whose mapping to an OSD has changed.
422d2cb8 3852 */
5aea3dcd
ID		 3853static void scan_requests(struct ceph_osd *osd,
3854 bool force_resend,
3855 bool cleared_full,
3856 bool check_pool_cleared_full,
3857 struct rb_root *need_resend,
3858 struct list_head *need_resend_linger)
422d2cb8 3859{
5aea3dcd
ID		 3860 struct ceph_osd_client *osdc = osd->o_osdc;
3861 struct rb_node *n;
3862 bool force_resend_writes;
3863
922dab61
ID		 3864 for (n = rb_first(&osd->o_linger_requests); n; ) {
3865 struct ceph_osd_linger_request *lreq =
3866 rb_entry(n, struct ceph_osd_linger_request, node);
3867 enum calc_target_result ct_res;
3868
3869 n = rb_next(n); /* recalc_linger_target() */
3870
3871 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3872 lreq->linger_id);
3873 ct_res = recalc_linger_target(lreq);
3874 switch (ct_res) {
3875 case CALC_TARGET_NO_ACTION:
3876 force_resend_writes = cleared_full ||
3877 (check_pool_cleared_full &&
3878 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3879 if (!force_resend && !force_resend_writes)
3880 break;
3881
df561f66 3882 fallthrough;
922dab61 3883 case CALC_TARGET_NEED_RESEND:
4609245e 3884 cancel_linger_map_check(lreq);
922dab61
ID		 3885 /*
3886 * scan_requests() for the previous epoch(s)
3887 * may have already added it to the list, since
3888 * it's not unlinked here.
3889 */
3890 if (list_empty(&lreq->scan_item))
3891 list_add_tail(&lreq->scan_item, need_resend_linger);
3892 break;
3893 case CALC_TARGET_POOL_DNE:
a10bcb19 3894 list_del_init(&lreq->scan_item);
4609245e 3895 check_linger_pool_dne(lreq);
922dab61
ID		 3896 break;
3897 }
3898 }
3899
5aea3dcd
ID		 3900 for (n = rb_first(&osd->o_requests); n; ) {
3901 struct ceph_osd_request *req =
3902 rb_entry(n, struct ceph_osd_request, r_node);
3903 enum calc_target_result ct_res;
3904
4609245e 3905 n = rb_next(n); /* unlink_request(), check_pool_dne() */
5aea3dcd
ID		 3906
3907 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
8edf84ba 3908 ct_res = calc_target(osdc, &req->r_t, false);
5aea3dcd
ID		 3909 switch (ct_res) {
3910 case CALC_TARGET_NO_ACTION:
3911 force_resend_writes = cleared_full ||
3912 (check_pool_cleared_full &&
3913 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3914 if (!force_resend &&
3915 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3916 !force_resend_writes))
3917 break;
3918
df561f66 3919 fallthrough;
5aea3dcd 3920 case CALC_TARGET_NEED_RESEND:
4609245e 3921 cancel_map_check(req);
5aea3dcd
ID		 3922 unlink_request(osd, req);
3923 insert_request(need_resend, req);
3924 break;
3925 case CALC_TARGET_POOL_DNE:
4609245e 3926 check_pool_dne(req);
5aea3dcd 3927 break;
b0494532 3928 }
6f6c7006 3929 }
422d2cb8 3930}
6f6c7006 3931
42c1b124 3932static int handle_one_map(struct ceph_osd_client *osdc,
5aea3dcd
ID		 3933 void *p, void *end, bool incremental,
3934 struct rb_root *need_resend,
3935 struct list_head *need_resend_linger)
42c1b124
ID		 3936{
3937 struct ceph_osdmap *newmap;
3938 struct rb_node *n;
3939 bool skipped_map = false;
3940 bool was_full;
3941
b7ec35b3 3942 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
42c1b124
ID		 3943 set_pool_was_full(osdc);
3944
3945 if (incremental)
cd1a677c
ID		 3946 newmap = osdmap_apply_incremental(&p, end,
3947 ceph_msgr2(osdc->client),
3948 osdc->osdmap);
42c1b124 3949 else
cd1a677c 3950 newmap = ceph_osdmap_decode(&p, end, ceph_msgr2(osdc->client));
42c1b124
ID		 3951 if (IS_ERR(newmap))
3952 return PTR_ERR(newmap);
3953
3954 if (newmap != osdc->osdmap) {
3955 /*
3956 * Preserve ->was_full before destroying the old map.
3957 * For pools that weren't in the old map, ->was_full
3958 * should be false.
3959 */
3960 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3961 struct ceph_pg_pool_info *pi =
3962 rb_entry(n, struct ceph_pg_pool_info, node);
3963 struct ceph_pg_pool_info *old_pi;
3964
3965 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3966 if (old_pi)
3967 pi->was_full = old_pi->was_full;
3968 else
3969 WARN_ON(pi->was_full);
3970 }
3971
3972 if (osdc->osdmap->epoch &&
3973 osdc->osdmap->epoch + 1 < newmap->epoch) {
3974 WARN_ON(incremental);
3975 skipped_map = true;
3976 }
3977
3978 ceph_osdmap_destroy(osdc->osdmap);
3979 osdc->osdmap = newmap;
3980 }
3981
b7ec35b3 3982 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
5aea3dcd
ID		 3983 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3984 need_resend, need_resend_linger);
3985
3986 for (n = rb_first(&osdc->osds); n; ) {
3987 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3988
3989 n = rb_next(n); /* close_osd() */
3990
3991 scan_requests(osd, skipped_map, was_full, true, need_resend,
3992 need_resend_linger);
3993 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3994 memcmp(&osd->o_con.peer_addr,
3995 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3996 sizeof(struct ceph_entity_addr)))
3997 close_osd(osd);
3998 }
42c1b124
ID		 3999
4000 return 0;
4001}
6f6c7006 4002
5aea3dcd
ID		 4003static void kick_requests(struct ceph_osd_client *osdc,
4004 struct rb_root *need_resend,
4005 struct list_head *need_resend_linger)
4006{
922dab61 4007 struct ceph_osd_linger_request *lreq, *nlreq;
04c7d789 4008 enum calc_target_result ct_res;
5aea3dcd
ID		 4009 struct rb_node *n;
4010
04c7d789
ID		 4011 /* make sure need_resend targets reflect latest map */
4012 for (n = rb_first(need_resend); n; ) {
4013 struct ceph_osd_request *req =
4014 rb_entry(n, struct ceph_osd_request, r_node);
4015
4016 n = rb_next(n);
4017
4018 if (req->r_t.epoch < osdc->osdmap->epoch) {
8edf84ba 4019 ct_res = calc_target(osdc, &req->r_t, false);
04c7d789
ID		 4020 if (ct_res == CALC_TARGET_POOL_DNE) {
4021 erase_request(need_resend, req);
4022 check_pool_dne(req);
4023 }
4024 }
4025 }
4026
5aea3dcd
ID		 4027 for (n = rb_first(need_resend); n; ) {
4028 struct ceph_osd_request *req =
4029 rb_entry(n, struct ceph_osd_request, r_node);
4030 struct ceph_osd *osd;
4031
4032 n = rb_next(n);
4033 erase_request(need_resend, req); /* before link_request() */
4034
5aea3dcd
ID		 4035 osd = lookup_create_osd(osdc, req->r_t.osd, true);
4036 link_request(osd, req);
4037 if (!req->r_linger) {
4038 if (!osd_homeless(osd) && !req->r_t.paused)
4039 send_request(req);
922dab61
ID		 4040 } else {
4041 cancel_linger_request(req);
5aea3dcd
ID		 4042 }
4043 }
922dab61
ID		 4044
4045 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
4046 if (!osd_homeless(lreq->osd))
4047 send_linger(lreq);
4048
4049 list_del_init(&lreq->scan_item);
4050 }
5aea3dcd
ID		 4051}
4052
f24e9980
SW		 4053/*
4054 * Process updated osd map.
4055 *
4056 * The message contains any number of incremental and full maps, normally
4057 * indicating some sort of topology change in the cluster. Kick requests
4058 * off to different OSDs as needed.
4059 */
4060void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
4061{
42c1b124
ID		 4062 void *p = msg->front.iov_base;
4063 void *const end = p + msg->front.iov_len;
f24e9980
SW		 4064 u32 nr_maps, maplen;
4065 u32 epoch;
f24e9980 4066 struct ceph_fsid fsid;
5aea3dcd
ID		 4067 struct rb_root need_resend = RB_ROOT;
4068 LIST_HEAD(need_resend_linger);
42c1b124
ID		 4069 bool handled_incremental = false;
4070 bool was_pauserd, was_pausewr;
4071 bool pauserd, pausewr;
4072 int err;
f24e9980 4073
42c1b124 4074 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
5aea3dcd 4075 down_write(&osdc->lock);
f24e9980
SW		 4076
4077 /* verify fsid */
4078 ceph_decode_need(&p, end, sizeof(fsid), bad);
4079 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 4080 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 4081 goto bad;
f24e9980 4082
b7ec35b3
ID		 4083 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4084 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4085 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 4086 have_pool_full(osdc);
9a1ea2db 4087
f24e9980
SW		 4088 /* incremental maps */
4089 ceph_decode_32_safe(&p, end, nr_maps, bad);
4090 dout(" %d inc maps\n", nr_maps);
4091 while (nr_maps > 0) {
4092 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 4093 epoch = ceph_decode_32(&p);
4094 maplen = ceph_decode_32(&p);
f24e9980 4095 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 4096 if (osdc->osdmap->epoch &&
4097 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 4098 dout("applying incremental map %u len %d\n",
4099 epoch, maplen);
5aea3dcd
ID		 4100 err = handle_one_map(osdc, p, p + maplen, true,
4101 &need_resend, &need_resend_linger);
42c1b124 4102 if (err)
f24e9980 4103 goto bad;
42c1b124 4104 handled_incremental = true;
f24e9980
SW		 4105 } else {
4106 dout("ignoring incremental map %u len %d\n",
4107 epoch, maplen);
4108 }
42c1b124 4109 p += maplen;
f24e9980
SW		 4110 nr_maps--;
4111 }
42c1b124 4112 if (handled_incremental)
f24e9980
SW		 4113 goto done;
4114
4115 /* full maps */
4116 ceph_decode_32_safe(&p, end, nr_maps, bad);
4117 dout(" %d full maps\n", nr_maps);
4118 while (nr_maps) {
4119 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 4120 epoch = ceph_decode_32(&p);
4121 maplen = ceph_decode_32(&p);
f24e9980
SW		 4122 ceph_decode_need(&p, end, maplen, bad);
4123 if (nr_maps > 1) {
4124 dout("skipping non-latest full map %u len %d\n",
4125 epoch, maplen);
e5253a7b 4126 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 4127 dout("skipping full map %u len %d, "
4128 "older than our %u\n", epoch, maplen,
4129 osdc->osdmap->epoch);
4130 } else {
4131 dout("taking full map %u len %d\n", epoch, maplen);
5aea3dcd
ID		 4132 err = handle_one_map(osdc, p, p + maplen, false,
4133 &need_resend, &need_resend_linger);
42c1b124 4134 if (err)
f24e9980 4135 goto bad;
f24e9980
SW		 4136 }
4137 p += maplen;
4138 nr_maps--;
4139 }
4140
4141done:
cd634fb6
SW		 4142 /*
4143 * subscribe to subsequent osdmap updates if full to ensure
4144 * we find out when we are no longer full and stop returning
4145 * ENOSPC.
4146 */
b7ec35b3
ID		 4147 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4148 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4149 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 4150 have_pool_full(osdc);
58eb7932
JL		 4151 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4152 osdc->osdmap->epoch < osdc->epoch_barrier)
42c1b124 4153 maybe_request_map(osdc);
cd634fb6 4154
5aea3dcd 4155 kick_requests(osdc, &need_resend, &need_resend_linger);
42c1b124 4156
fc36d0a4 4157 ceph_osdc_abort_on_full(osdc);
42c1b124
ID		 4158 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4159 osdc->osdmap->epoch);
5aea3dcd 4160 up_write(&osdc->lock);
03066f23 4161 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 4162 return;
4163
4164bad:
4165 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 4166 ceph_msg_dump(msg);
5aea3dcd
ID		 4167 up_write(&osdc->lock);
4168}
4169
4170/*
4171 * Resubmit requests pending on the given osd.
4172 */
4173static void kick_osd_requests(struct ceph_osd *osd)
4174{
4175 struct rb_node *n;
4176
a02a946d
ID		 4177 clear_backoffs(osd);
4178
922dab61 4179 for (n = rb_first(&osd->o_requests); n; ) {
5aea3dcd
ID		 4180 struct ceph_osd_request *req =
4181 rb_entry(n, struct ceph_osd_request, r_node);
4182
922dab61
ID		 4183 n = rb_next(n); /* cancel_linger_request() */
4184
5aea3dcd
ID		 4185 if (!req->r_linger) {
4186 if (!req->r_t.paused)
4187 send_request(req);
922dab61
ID		 4188 } else {
4189 cancel_linger_request(req);
5aea3dcd
ID		 4190 }
4191 }
922dab61
ID		 4192 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4193 struct ceph_osd_linger_request *lreq =
4194 rb_entry(n, struct ceph_osd_linger_request, node);
4195
4196 send_linger(lreq);
4197 }
5aea3dcd
ID		 4198}
4199
4200/*
4201 * If the osd connection drops, we need to resubmit all requests.
4202 */
4203static void osd_fault(struct ceph_connection *con)
4204{
4205 struct ceph_osd *osd = con->private;
4206 struct ceph_osd_client *osdc = osd->o_osdc;
4207
4208 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4209
4210 down_write(&osdc->lock);
4211 if (!osd_registered(osd)) {
4212 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4213 goto out_unlock;
4214 }
4215
4216 if (!reopen_osd(osd))
4217 kick_osd_requests(osd);
4218 maybe_request_map(osdc);
4219
4220out_unlock:
4221 up_write(&osdc->lock);
f24e9980
SW		 4222}
4223
a02a946d
ID		 4224struct MOSDBackoff {
4225 struct ceph_spg spgid;
4226 u32 map_epoch;
4227 u8 op;
4228 u64 id;
4229 struct ceph_hobject_id *begin;
4230 struct ceph_hobject_id *end;
4231};
4232
4233static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4234{
4235 void *p = msg->front.iov_base;
4236 void *const end = p + msg->front.iov_len;
4237 u8 struct_v;
4238 u32 struct_len;
4239 int ret;
4240
4241 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4242 if (ret)
4243 return ret;
4244
4245 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4246 if (ret)
4247 return ret;
4248
4249 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4250 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4251 ceph_decode_8_safe(&p, end, m->op, e_inval);
4252 ceph_decode_64_safe(&p, end, m->id, e_inval);
4253
4254 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4255 if (!m->begin)
4256 return -ENOMEM;
4257
4258 ret = decode_hoid(&p, end, m->begin);
4259 if (ret) {
4260 free_hoid(m->begin);
4261 return ret;
4262 }
4263
4264 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4265 if (!m->end) {
4266 free_hoid(m->begin);
4267 return -ENOMEM;
4268 }
4269
4270 ret = decode_hoid(&p, end, m->end);
4271 if (ret) {
4272 free_hoid(m->begin);
4273 free_hoid(m->end);
4274 return ret;
4275 }
4276
4277 return 0;
4278
4279e_inval:
4280 return -EINVAL;
4281}
4282
4283static struct ceph_msg *create_backoff_message(
4284 const struct ceph_osd_backoff *backoff,
4285 u32 map_epoch)
4286{
4287 struct ceph_msg *msg;
4288 void *p, *end;
4289 int msg_size;
4290
4291 msg_size = CEPH_ENCODING_START_BLK_LEN +
4292 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4293 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4294 msg_size += CEPH_ENCODING_START_BLK_LEN +
4295 hoid_encoding_size(backoff->begin);
4296 msg_size += CEPH_ENCODING_START_BLK_LEN +
4297 hoid_encoding_size(backoff->end);
4298
4299 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4300 if (!msg)
4301 return NULL;
4302
4303 p = msg->front.iov_base;
4304 end = p + msg->front_alloc_len;
4305
4306 encode_spgid(&p, &backoff->spgid);
4307 ceph_encode_32(&p, map_epoch);
4308 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4309 ceph_encode_64(&p, backoff->id);
4310 encode_hoid(&p, end, backoff->begin);
4311 encode_hoid(&p, end, backoff->end);
4312 BUG_ON(p != end);
4313
4314 msg->front.iov_len = p - msg->front.iov_base;
4315 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4316 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4317
4318 return msg;
4319}
4320
4321static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4322{
4323 struct ceph_spg_mapping *spg;
4324 struct ceph_osd_backoff *backoff;
4325 struct ceph_msg *msg;
4326
4327 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4328 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4329
4330 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4331 if (!spg) {
4332 spg = alloc_spg_mapping();
4333 if (!spg) {
4334 pr_err("%s failed to allocate spg\n", __func__);
4335 return;
4336 }
4337 spg->spgid = m->spgid; /* struct */
4338 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4339 }
4340
4341 backoff = alloc_backoff();
4342 if (!backoff) {
4343 pr_err("%s failed to allocate backoff\n", __func__);
4344 return;
4345 }
4346 backoff->spgid = m->spgid; /* struct */
4347 backoff->id = m->id;
4348 backoff->begin = m->begin;
4349 m->begin = NULL; /* backoff now owns this */
4350 backoff->end = m->end;
4351 m->end = NULL; /* ditto */
4352
4353 insert_backoff(&spg->backoffs, backoff);
4354 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4355
4356 /*
4357 * Ack with original backoff's epoch so that the OSD can
4358 * discard this if there was a PG split.
4359 */
4360 msg = create_backoff_message(backoff, m->map_epoch);
4361 if (!msg) {
4362 pr_err("%s failed to allocate msg\n", __func__);
4363 return;
4364 }
4365 ceph_con_send(&osd->o_con, msg);
4366}
4367
4368static bool target_contained_by(const struct ceph_osd_request_target *t,
4369 const struct ceph_hobject_id *begin,
4370 const struct ceph_hobject_id *end)
4371{
4372 struct ceph_hobject_id hoid;
4373 int cmp;
4374
4375 hoid_fill_from_target(&hoid, t);
4376 cmp = hoid_compare(&hoid, begin);
4377 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4378}
4379
4380static void handle_backoff_unblock(struct ceph_osd *osd,
4381 const struct MOSDBackoff *m)
4382{
4383 struct ceph_spg_mapping *spg;
4384 struct ceph_osd_backoff *backoff;
4385 struct rb_node *n;
4386
4387 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4388 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4389
4390 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4391 if (!backoff) {
4392 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4393 __func__, osd->o_osd, m->spgid.pgid.pool,
4394 m->spgid.pgid.seed, m->spgid.shard, m->id);
4395 return;
4396 }
4397
4398 if (hoid_compare(backoff->begin, m->begin) &&
4399 hoid_compare(backoff->end, m->end)) {
4400 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4401 __func__, osd->o_osd, m->spgid.pgid.pool,
4402 m->spgid.pgid.seed, m->spgid.shard, m->id);
4403 /* unblock it anyway... */
4404 }
4405
4406 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4407 BUG_ON(!spg);
4408
4409 erase_backoff(&spg->backoffs, backoff);
4410 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4411 free_backoff(backoff);
4412
4413 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4414 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4415 free_spg_mapping(spg);
4416 }
4417
4418 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4419 struct ceph_osd_request *req =
4420 rb_entry(n, struct ceph_osd_request, r_node);
4421
4422 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4423 /*
4424 * Match against @m, not @backoff -- the PG may
4425 * have split on the OSD.
4426 */
4427 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4428 /*
4429 * If no other installed backoff applies,
4430 * resend.
4431 */
4432 send_request(req);
4433 }
4434 }
4435 }
4436}
4437
4438static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4439{
4440 struct ceph_osd_client *osdc = osd->o_osdc;
4441 struct MOSDBackoff m;
4442 int ret;
4443
4444 down_read(&osdc->lock);
4445 if (!osd_registered(osd)) {
4446 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4447 up_read(&osdc->lock);
4448 return;
4449 }
4450 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4451
4452 mutex_lock(&osd->lock);
4453 ret = decode_MOSDBackoff(msg, &m);
4454 if (ret) {
4455 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4456 ceph_msg_dump(msg);
4457 goto out_unlock;
4458 }
4459
4460 switch (m.op) {
4461 case CEPH_OSD_BACKOFF_OP_BLOCK:
4462 handle_backoff_block(osd, &m);
4463 break;
4464 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4465 handle_backoff_unblock(osd, &m);
4466 break;
4467 default:
4468 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4469 }
4470
4471 free_hoid(m.begin);
4472 free_hoid(m.end);
4473
4474out_unlock:
4475 mutex_unlock(&osd->lock);
4476 up_read(&osdc->lock);
4477}
4478
a40c4f10
YS		 4479/*
4480 * Process osd watch notifications
4481 */
3c663bbd
AE		 4482static void handle_watch_notify(struct ceph_osd_client *osdc,
4483 struct ceph_msg *msg)
a40c4f10 4484{
922dab61
ID		 4485 void *p = msg->front.iov_base;
4486 void *const end = p + msg->front.iov_len;
4487 struct ceph_osd_linger_request *lreq;
4488 struct linger_work *lwork;
4489 u8 proto_ver, opcode;
4490 u64 cookie, notify_id;
4491 u64 notifier_id = 0;
19079203 4492 s32 return_code = 0;
922dab61
ID		 4493 void *payload = NULL;
4494 u32 payload_len = 0;
a40c4f10
YS		 4495
4496 ceph_decode_8_safe(&p, end, proto_ver, bad);
4497 ceph_decode_8_safe(&p, end, opcode, bad);
4498 ceph_decode_64_safe(&p, end, cookie, bad);
922dab61 4499 p += 8; /* skip ver */
a40c4f10
YS		 4500 ceph_decode_64_safe(&p, end, notify_id, bad);
4501
922dab61
ID		 4502 if (proto_ver >= 1) {
4503 ceph_decode_32_safe(&p, end, payload_len, bad);
4504 ceph_decode_need(&p, end, payload_len, bad);
4505 payload = p;
4506 p += payload_len;
4507 }
4508
4509 if (le16_to_cpu(msg->hdr.version) >= 2)
19079203 4510 ceph_decode_32_safe(&p, end, return_code, bad);
922dab61
ID		 4511
4512 if (le16_to_cpu(msg->hdr.version) >= 3)
4513 ceph_decode_64_safe(&p, end, notifier_id, bad);
4514
4515 down_read(&osdc->lock);
4516 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4517 if (!lreq) {
4518 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4519 cookie);
4520 goto out_unlock_osdc;
4521 }
4522
4523 mutex_lock(&lreq->lock);
19079203
ID		 4524 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4525 opcode, cookie, lreq, lreq->is_watch);
922dab61
ID		 4526 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4527 if (!lreq->last_error) {
4528 lreq->last_error = -ENOTCONN;
4529 queue_watch_error(lreq);
4530 }
19079203
ID		 4531 } else if (!lreq->is_watch) {
4532 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4533 if (lreq->notify_id && lreq->notify_id != notify_id) {
4534 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4535 lreq->notify_id, notify_id);
4536 } else if (!completion_done(&lreq->notify_finish_wait)) {
4537 struct ceph_msg_data *data =
0d9c1ab3 4538 msg->num_data_items ? &msg->data[0] : NULL;
19079203
ID		 4539
4540 if (data) {
4541 if (lreq->preply_pages) {
4542 WARN_ON(data->type !=
4543 CEPH_MSG_DATA_PAGES);
4544 *lreq->preply_pages = data->pages;
4545 *lreq->preply_len = data->length;
e8862740 4546 data->own_pages = false;
19079203
ID		 4547 }
4548 }
4549 lreq->notify_finish_error = return_code;
4550 complete_all(&lreq->notify_finish_wait);
4551 }
922dab61
ID		 4552 } else {
4553 /* CEPH_WATCH_EVENT_NOTIFY */
4554 lwork = lwork_alloc(lreq, do_watch_notify);
4555 if (!lwork) {
4556 pr_err("failed to allocate notify-lwork\n");
4557 goto out_unlock_lreq;
a40c4f10 4558 }
a40c4f10 4559
922dab61
ID		 4560 lwork->notify.notify_id = notify_id;
4561 lwork->notify.notifier_id = notifier_id;
4562 lwork->notify.payload = payload;
4563 lwork->notify.payload_len = payload_len;
4564 lwork->notify.msg = ceph_msg_get(msg);
4565 lwork_queue(lwork);
91883cd2 4566 }
a40c4f10 4567
922dab61
ID		 4568out_unlock_lreq:
4569 mutex_unlock(&lreq->lock);
4570out_unlock_osdc:
4571 up_read(&osdc->lock);
a40c4f10
YS		 4572 return;
4573
4574bad:
4575 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 4576}
4577
70636773
AE		 4578/*
4579 * Register request, send initial attempt.
4580 */
a8af0d68
JL		 4581void ceph_osdc_start_request(struct ceph_osd_client *osdc,
4582 struct ceph_osd_request *req)
70636773 4583{
5aea3dcd
ID		 4584 down_read(&osdc->lock);
4585 submit_request(req, false);
4586 up_read(&osdc->lock);
f24e9980 4587}
3d14c5d2 4588EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 4589
c9f9b93d 4590/*
d0bb883c
ID		 4591 * Unregister request. If @req was registered, it isn't completed:
4592 * r_result isn't set and __complete_request() isn't invoked.
4593 *
4594 * If @req wasn't registered, this call may have raced with
4595 * handle_reply(), in which case r_result would already be set and
4596 * __complete_request() would be getting invoked, possibly even
4597 * concurrently with this call.
c9f9b93d
ID		 4598 */
4599void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4600{
4601 struct ceph_osd_client *osdc = req->r_osdc;
4602
5aea3dcd 4603 down_write(&osdc->lock);
5aea3dcd
ID		 4604 if (req->r_osd)
4605 cancel_request(req);
4606 up_write(&osdc->lock);
c9f9b93d
ID		 4607}
4608EXPORT_SYMBOL(ceph_osdc_cancel_request);
4609
f24e9980 4610/*
42b06965 4611 * @timeout: in jiffies, 0 means "wait forever"
f24e9980 4612 */
42b06965
ID		 4613static int wait_request_timeout(struct ceph_osd_request *req,
4614 unsigned long timeout)
f24e9980 4615{
42b06965 4616 long left;
c9f9b93d 4617
42b06965 4618 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
0e76abf2 4619 left = wait_for_completion_killable_timeout(&req->r_completion,
42b06965
ID		 4620 ceph_timeout_jiffies(timeout));
4621 if (left <= 0) {
4622 left = left ?: -ETIMEDOUT;
c9f9b93d 4623 ceph_osdc_cancel_request(req);
42b06965
ID		 4624 } else {
4625 left = req->r_result; /* completed */
f24e9980
SW		 4626 }
4627
42b06965
ID		 4628 return left;
4629}
4630
4631/*
4632 * wait for a request to complete
4633 */
4634int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4635 struct ceph_osd_request *req)
4636{
4637 return wait_request_timeout(req, 0);
f24e9980 4638}
3d14c5d2 4639EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 4640
4641/*
4642 * sync - wait for all in-flight requests to flush. avoid starvation.
4643 */
4644void ceph_osdc_sync(struct ceph_osd_client *osdc)
4645{
5aea3dcd
ID		 4646 struct rb_node *n, *p;
4647 u64 last_tid = atomic64_read(&osdc->last_tid);
f24e9980 4648
5aea3dcd
ID		 4649again:
4650 down_read(&osdc->lock);
4651 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4652 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4653
4654 mutex_lock(&osd->lock);
4655 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4656 struct ceph_osd_request *req =
4657 rb_entry(p, struct ceph_osd_request, r_node);
4658
4659 if (req->r_tid > last_tid)
4660 break;
4661
4662 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4663 continue;
f24e9980 4664
5aea3dcd
ID		 4665 ceph_osdc_get_request(req);
4666 mutex_unlock(&osd->lock);
4667 up_read(&osdc->lock);
4668 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4669 __func__, req, req->r_tid, last_tid);
b18b9550 4670 wait_for_completion(&req->r_completion);
5aea3dcd
ID		 4671 ceph_osdc_put_request(req);
4672 goto again;
4673 }
f24e9980 4674
5aea3dcd 4675 mutex_unlock(&osd->lock);
f24e9980 4676 }
5aea3dcd
ID		 4677
4678 up_read(&osdc->lock);
4679 dout("%s done last_tid %llu\n", __func__, last_tid);
f24e9980 4680}
3d14c5d2 4681EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 4682
922dab61
ID		 4683/*
4684 * Returns a handle, caller owns a ref.
4685 */
4686struct ceph_osd_linger_request *
4687ceph_osdc_watch(struct ceph_osd_client *osdc,
4688 struct ceph_object_id *oid,
4689 struct ceph_object_locator *oloc,
4690 rados_watchcb2_t wcb,
4691 rados_watcherrcb_t errcb,
4692 void *data)
4693{
4694 struct ceph_osd_linger_request *lreq;
4695 int ret;
4696
4697 lreq = linger_alloc(osdc);
4698 if (!lreq)
4699 return ERR_PTR(-ENOMEM);
4700
19079203 4701 lreq->is_watch = true;
922dab61
ID		 4702 lreq->wcb = wcb;
4703 lreq->errcb = errcb;
4704 lreq->data = data;
b07d3c4b 4705 lreq->watch_valid_thru = jiffies;
922dab61
ID		 4706
4707 ceph_oid_copy(&lreq->t.base_oid, oid);
4708 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
54ea0046 4709 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
fac02ddf 4710 ktime_get_real_ts64(&lreq->mtime);
922dab61 4711
81c65213 4712 linger_submit(lreq);
922dab61
ID		 4713 ret = linger_reg_commit_wait(lreq);
4714 if (ret) {
4715 linger_cancel(lreq);
4716 goto err_put_lreq;
4717 }
4718
4719 return lreq;
4720
4721err_put_lreq:
4722 linger_put(lreq);
4723 return ERR_PTR(ret);
4724}
4725EXPORT_SYMBOL(ceph_osdc_watch);
4726
4727/*
4728 * Releases a ref.
4729 *
4730 * Times out after mount_timeout to preserve rbd unmap behaviour
4731 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4732 * with mount_timeout").
4733 */
4734int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4735 struct ceph_osd_linger_request *lreq)
4736{
4737 struct ceph_options *opts = osdc->client->options;
4738 struct ceph_osd_request *req;
4739 int ret;
4740
4741 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4742 if (!req)
4743 return -ENOMEM;
4744
4745 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4746 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
54ea0046 4747 req->r_flags = CEPH_OSD_FLAG_WRITE;
fac02ddf 4748 ktime_get_real_ts64(&req->r_mtime);
75dbb685
ID		 4749 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_UNWATCH,
4750 lreq->linger_id, 0);
922dab61
ID		 4751
4752 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4753 if (ret)
4754 goto out_put_req;
4755
a8af0d68 4756 ceph_osdc_start_request(osdc, req);
922dab61
ID		 4757 linger_cancel(lreq);
4758 linger_put(lreq);
4759 ret = wait_request_timeout(req, opts->mount_timeout);
4760
4761out_put_req:
4762 ceph_osdc_put_request(req);
4763 return ret;
4764}
4765EXPORT_SYMBOL(ceph_osdc_unwatch);
4766
4767static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4768 u64 notify_id, u64 cookie, void *payload,
6d54228f 4769 u32 payload_len)
922dab61
ID		 4770{
4771 struct ceph_osd_req_op *op;
4772 struct ceph_pagelist *pl;
4773 int ret;
4774
042f6498 4775 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
922dab61 4776
33165d47 4777 pl = ceph_pagelist_alloc(GFP_NOIO);
922dab61
ID		 4778 if (!pl)
4779 return -ENOMEM;
4780
922dab61
ID		 4781 ret = ceph_pagelist_encode_64(pl, notify_id);
4782 ret |= ceph_pagelist_encode_64(pl, cookie);
4783 if (payload) {
4784 ret |= ceph_pagelist_encode_32(pl, payload_len);
4785 ret |= ceph_pagelist_append(pl, payload, payload_len);
4786 } else {
4787 ret |= ceph_pagelist_encode_32(pl, 0);
4788 }
4789 if (ret) {
4790 ceph_pagelist_release(pl);
4791 return -ENOMEM;
4792 }
4793
4794 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4795 op->indata_len = pl->length;
4796 return 0;
4797}
4798
4799int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4800 struct ceph_object_id *oid,
4801 struct ceph_object_locator *oloc,
4802 u64 notify_id,
4803 u64 cookie,
4804 void *payload,
6d54228f 4805 u32 payload_len)
922dab61
ID		 4806{
4807 struct ceph_osd_request *req;
4808 int ret;
4809
4810 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4811 if (!req)
4812 return -ENOMEM;
4813
4814 ceph_oid_copy(&req->r_base_oid, oid);
4815 ceph_oloc_copy(&req->r_base_oloc, oloc);
4816 req->r_flags = CEPH_OSD_FLAG_READ;
4817
26f887e0
ID		 4818 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4819 payload_len);
922dab61
ID		 4820 if (ret)
4821 goto out_put_req;
4822
26f887e0 4823 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
922dab61
ID		 4824 if (ret)
4825 goto out_put_req;
4826
a8af0d68 4827 ceph_osdc_start_request(osdc, req);
922dab61
ID		 4828 ret = ceph_osdc_wait_request(osdc, req);
4829
4830out_put_req:
4831 ceph_osdc_put_request(req);
4832 return ret;
4833}
4834EXPORT_SYMBOL(ceph_osdc_notify_ack);
4835
19079203
ID		 4836/*
4837 * @timeout: in seconds
4838 *
4839 * @preply_{pages,len} are initialized both on success and error.
4840 * The caller is responsible for:
4841 *
4842 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4843 */
4844int ceph_osdc_notify(struct ceph_osd_client *osdc,
4845 struct ceph_object_id *oid,
4846 struct ceph_object_locator *oloc,
4847 void *payload,
6d54228f 4848 u32 payload_len,
19079203
ID		 4849 u32 timeout,
4850 struct page ***preply_pages,
4851 size_t *preply_len)
4852{
4853 struct ceph_osd_linger_request *lreq;
19079203
ID		 4854 int ret;
4855
4856 WARN_ON(!timeout);
4857 if (preply_pages) {
4858 *preply_pages = NULL;
4859 *preply_len = 0;
4860 }
4861
4862 lreq = linger_alloc(osdc);
4863 if (!lreq)
4864 return -ENOMEM;
4865
75dbb685
ID		 4866 lreq->request_pl = ceph_pagelist_alloc(GFP_NOIO);
4867 if (!lreq->request_pl) {
19079203
ID		 4868 ret = -ENOMEM;
4869 goto out_put_lreq;
4870 }
4871
75dbb685
ID		 4872 ret = ceph_pagelist_encode_32(lreq->request_pl, 1); /* prot_ver */
4873 ret |= ceph_pagelist_encode_32(lreq->request_pl, timeout);
4874 ret |= ceph_pagelist_encode_32(lreq->request_pl, payload_len);
4875 ret |= ceph_pagelist_append(lreq->request_pl, payload, payload_len);
4876 if (ret) {
4877 ret = -ENOMEM;
81c65213 4878 goto out_put_lreq;
75dbb685 4879 }
81c65213 4880
19079203 4881 /* for notify_id */
75dbb685
ID		 4882 lreq->notify_id_pages = ceph_alloc_page_vector(1, GFP_NOIO);
4883 if (IS_ERR(lreq->notify_id_pages)) {
4884 ret = PTR_ERR(lreq->notify_id_pages);
4885 lreq->notify_id_pages = NULL;
19079203
ID		 4886 goto out_put_lreq;
4887 }
19079203 4888
75dbb685
ID		 4889 lreq->preply_pages = preply_pages;
4890 lreq->preply_len = preply_len;
4891
4892 ceph_oid_copy(&lreq->t.base_oid, oid);
4893 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4894 lreq->t.flags = CEPH_OSD_FLAG_READ;
26f887e0 4895
81c65213 4896 linger_submit(lreq);
19079203
ID		 4897 ret = linger_reg_commit_wait(lreq);
4898 if (!ret)
4899 ret = linger_notify_finish_wait(lreq);
4900 else
4901 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4902
4903 linger_cancel(lreq);
4904out_put_lreq:
4905 linger_put(lreq);
4906 return ret;
4907}
4908EXPORT_SYMBOL(ceph_osdc_notify);
4909
b07d3c4b
ID		 4910/*
4911 * Return the number of milliseconds since the watch was last
4912 * confirmed, or an error. If there is an error, the watch is no
4913 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4914 */
4915int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4916 struct ceph_osd_linger_request *lreq)
4917{
4918 unsigned long stamp, age;
4919 int ret;
4920
4921 down_read(&osdc->lock);
4922 mutex_lock(&lreq->lock);
4923 stamp = lreq->watch_valid_thru;
4924 if (!list_empty(&lreq->pending_lworks)) {
4925 struct linger_work *lwork =
4926 list_first_entry(&lreq->pending_lworks,
4927 struct linger_work,
4928 pending_item);
4929
4930 if (time_before(lwork->queued_stamp, stamp))
4931 stamp = lwork->queued_stamp;
4932 }
4933 age = jiffies - stamp;
4934 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4935 lreq, lreq->linger_id, age, lreq->last_error);
4936 /* we are truncating to msecs, so return a safe upper bound */
4937 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4938
4939 mutex_unlock(&lreq->lock);
4940 up_read(&osdc->lock);
4941 return ret;
4942}
4943
a4ed38d7
DF		 4944static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4945{
4946 u8 struct_v;
4947 u32 struct_len;
4948 int ret;
4949
4950 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4951 &struct_v, &struct_len);
4952 if (ret)
51fc7ab4
JL		 4953 goto bad;
4954
4955 ret = -EINVAL;
4956 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
4957 ceph_decode_64_safe(p, end, item->cookie, bad);
4958 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
a4ed38d7 4959
a4ed38d7 4960 if (struct_v >= 2) {
51fc7ab4
JL		 4961 ret = ceph_decode_entity_addr(p, end, &item->addr);
4962 if (ret)
4963 goto bad;
4964 } else {
4965 ret = 0;
a4ed38d7
DF		 4966 }
4967
4968 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4969 ENTITY_NAME(item->name), item->cookie,
b726ec97 4970 ceph_pr_addr(&item->addr));
51fc7ab4
JL		 4971bad:
4972 return ret;
a4ed38d7
DF		 4973}
4974
4975static int decode_watchers(void **p, void *end,
4976 struct ceph_watch_item **watchers,
4977 u32 *num_watchers)
4978{
4979 u8 struct_v;
4980 u32 struct_len;
4981 int i;
4982 int ret;
4983
4984 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4985 &struct_v, &struct_len);
4986 if (ret)
4987 return ret;
4988
4989 *num_watchers = ceph_decode_32(p);
4990 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4991 if (!*watchers)
4992 return -ENOMEM;
4993
4994 for (i = 0; i < *num_watchers; i++) {
4995 ret = decode_watcher(p, end, *watchers + i);
4996 if (ret) {
4997 kfree(*watchers);
4998 return ret;
4999 }
5000 }
5001
5002 return 0;
5003}
5004
5005/*
5006 * On success, the caller is responsible for:
5007 *
5008 * kfree(watchers);
5009 */
5010int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
5011 struct ceph_object_id *oid,
5012 struct ceph_object_locator *oloc,
5013 struct ceph_watch_item **watchers,
5014 u32 *num_watchers)
5015{
5016 struct ceph_osd_request *req;
5017 struct page **pages;
5018 int ret;
5019
5020 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5021 if (!req)
5022 return -ENOMEM;
5023
5024 ceph_oid_copy(&req->r_base_oid, oid);
5025 ceph_oloc_copy(&req->r_base_oloc, oloc);
5026 req->r_flags = CEPH_OSD_FLAG_READ;
5027
a4ed38d7
DF		 5028 pages = ceph_alloc_page_vector(1, GFP_NOIO);
5029 if (IS_ERR(pages)) {
5030 ret = PTR_ERR(pages);
5031 goto out_put_req;
5032 }
5033
5034 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
5035 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
5036 response_data),
5037 pages, PAGE_SIZE, 0, false, true);
5038
26f887e0
ID		 5039 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5040 if (ret)
5041 goto out_put_req;
5042
a8af0d68 5043 ceph_osdc_start_request(osdc, req);
a4ed38d7
DF		 5044 ret = ceph_osdc_wait_request(osdc, req);
5045 if (ret >= 0) {
5046 void *p = page_address(pages[0]);
5047 void *const end = p + req->r_ops[0].outdata_len;
5048
5049 ret = decode_watchers(&p, end, watchers, num_watchers);
5050 }
5051
5052out_put_req:
5053 ceph_osdc_put_request(req);
5054 return ret;
5055}
5056EXPORT_SYMBOL(ceph_osdc_list_watchers);
5057
dd935f44
JD		 5058/*
5059 * Call all pending notify callbacks - for use after a watch is
5060 * unregistered, to make sure no more callbacks for it will be invoked
5061 */
f6479449 5062void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44 5063{
99d16943 5064 dout("%s osdc %p\n", __func__, osdc);
dd935f44
JD		 5065 flush_workqueue(osdc->notify_wq);
5066}
5067EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5068
7cca78c9
ID		 5069void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5070{
5071 down_read(&osdc->lock);
5072 maybe_request_map(osdc);
5073 up_read(&osdc->lock);
5074}
5075EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
dd935f44 5076
428a7158
DF		 5077/*
5078 * Execute an OSD class method on an object.
5079 *
5080 * @flags: CEPH_OSD_FLAG_*
2544a020 5081 * @resp_len: in/out param for reply length
428a7158
DF		 5082 */
5083int ceph_osdc_call(struct ceph_osd_client *osdc,
5084 struct ceph_object_id *oid,
5085 struct ceph_object_locator *oloc,
5086 const char *class, const char *method,
5087 unsigned int flags,
5088 struct page *req_page, size_t req_len,
68ada915 5089 struct page **resp_pages, size_t *resp_len)
428a7158
DF		 5090{
5091 struct ceph_osd_request *req;
5092 int ret;
5093
68ada915 5094 if (req_len > PAGE_SIZE)
2544a020
ID		 5095 return -E2BIG;
5096
428a7158
DF		 5097 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5098 if (!req)
5099 return -ENOMEM;
5100
5101 ceph_oid_copy(&req->r_base_oid, oid);
5102 ceph_oloc_copy(&req->r_base_oloc, oloc);
5103 req->r_flags = flags;
5104
24639ce5 5105 ret = osd_req_op_cls_init(req, 0, class, method);
fe943d50
CX		 5106 if (ret)
5107 goto out_put_req;
5108
428a7158
DF		 5109 if (req_page)
5110 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5111 0, false, false);
68ada915
ID		 5112 if (resp_pages)
5113 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
2544a020 5114 *resp_len, 0, false, false);
428a7158 5115
26f887e0
ID		 5116 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5117 if (ret)
5118 goto out_put_req;
5119
a8af0d68 5120 ceph_osdc_start_request(osdc, req);
428a7158
DF		 5121 ret = ceph_osdc_wait_request(osdc, req);
5122 if (ret >= 0) {
5123 ret = req->r_ops[0].rval;
68ada915 5124 if (resp_pages)
428a7158
DF		 5125 *resp_len = req->r_ops[0].outdata_len;
5126 }
5127
5128out_put_req:
5129 ceph_osdc_put_request(req);
5130 return ret;
5131}
5132EXPORT_SYMBOL(ceph_osdc_call);
5133
120a75ea
YZ		 5134/*
5135 * reset all osd connections
5136 */
5137void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc)
5138{
5139 struct rb_node *n;
5140
5141 down_write(&osdc->lock);
5142 for (n = rb_first(&osdc->osds); n; ) {
5143 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
5144
5145 n = rb_next(n);
5146 if (!reopen_osd(osd))
5147 kick_osd_requests(osd);
5148 }
5149 up_write(&osdc->lock);
5150}
5151
f24e9980
SW		 5152/*
5153 * init, shutdown
5154 */
5155int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5156{
5157 int err;
5158
5159 dout("init\n");
5160 osdc->client = client;
5aea3dcd 5161 init_rwsem(&osdc->lock);
f24e9980 5162 osdc->osds = RB_ROOT;
f5a2041b 5163 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 5164 spin_lock_init(&osdc->osd_lru_lock);
5aea3dcd
ID		 5165 osd_init(&osdc->homeless_osd);
5166 osdc->homeless_osd.o_osdc = osdc;
5167 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
264048af 5168 osdc->last_linger_id = CEPH_LINGER_ID_START;
922dab61 5169 osdc->linger_requests = RB_ROOT;
4609245e
ID		 5170 osdc->map_checks = RB_ROOT;
5171 osdc->linger_map_checks = RB_ROOT;
f24e9980 5172 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b
YS		 5173 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5174
5f44f142 5175 err = -ENOMEM;
e5253a7b
ID		 5176 osdc->osdmap = ceph_osdmap_alloc();
5177 if (!osdc->osdmap)
5178 goto out;
5179
9e767adb
ID		 5180 osdc->req_mempool = mempool_create_slab_pool(10,
5181 ceph_osd_request_cache);
f24e9980 5182 if (!osdc->req_mempool)
e5253a7b 5183 goto out_map;
f24e9980 5184
d50b409f 5185 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
0d9c1ab3 5186 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
f24e9980 5187 if (err < 0)
5f44f142 5188 goto out_mempool;
d50b409f 5189 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
0d9c1ab3
ID		 5190 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5191 "osd_op_reply");
c16e7869
SW		 5192 if (err < 0)
5193 goto out_msgpool;
a40c4f10 5194
dbcae088 5195 err = -ENOMEM;
a40c4f10 5196 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 5197 if (!osdc->notify_wq)
c172ec5c
ID		 5198 goto out_msgpool_reply;
5199
88bc1922
ID		 5200 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5201 if (!osdc->completion_wq)
5202 goto out_notify_wq;
5203
fbca9635
ID		 5204 schedule_delayed_work(&osdc->timeout_work,
5205 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 5206 schedule_delayed_work(&osdc->osds_timeout_work,
5207 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5208
f24e9980 5209 return 0;
5f44f142 5210
88bc1922
ID		 5211out_notify_wq:
5212 destroy_workqueue(osdc->notify_wq);
c172ec5c
ID		 5213out_msgpool_reply:
5214 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 5215out_msgpool:
5216 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 5217out_mempool:
5218 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 5219out_map:
5220 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 5221out:
5222 return err;
f24e9980
SW		 5223}
5224
5225void ceph_osdc_stop(struct ceph_osd_client *osdc)
5226{
88bc1922 5227 destroy_workqueue(osdc->completion_wq);
a40c4f10 5228 destroy_workqueue(osdc->notify_wq);
f24e9980 5229 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 5230 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f 5231
5aea3dcd 5232 down_write(&osdc->lock);
42a2c09f
ID		 5233 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5234 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5235 struct ceph_osd, o_node);
5aea3dcd 5236 close_osd(osd);
42a2c09f 5237 }
5aea3dcd 5238 up_write(&osdc->lock);
02113a0f 5239 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5aea3dcd
ID		 5240 osd_cleanup(&osdc->homeless_osd);
5241
5242 WARN_ON(!list_empty(&osdc->osd_lru));
922dab61 5243 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4609245e
ID		 5244 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5245 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5aea3dcd
ID		 5246 WARN_ON(atomic_read(&osdc->num_requests));
5247 WARN_ON(atomic_read(&osdc->num_homeless));
42a2c09f 5248
e5253a7b 5249 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 5250 mempool_destroy(osdc->req_mempool);
5251 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 5252 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 5253}
5254
aca39d9e
LH		 5255int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5256 u64 src_snapid, u64 src_version,
5257 struct ceph_object_id *src_oid,
5258 struct ceph_object_locator *src_oloc,
5259 u32 src_fadvise_flags,
5260 u32 dst_fadvise_flags,
5261 u32 truncate_seq, u64 truncate_size,
5262 u8 copy_from_flags)
23ddf9be
LH		 5263{
5264 struct ceph_osd_req_op *op;
5265 struct page **pages;
5266 void *p, *end;
5267
5268 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5269 if (IS_ERR(pages))
5270 return PTR_ERR(pages);
5271
042f6498
JL		 5272 op = osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2,
5273 dst_fadvise_flags);
23ddf9be
LH		 5274 op->copy_from.snapid = src_snapid;
5275 op->copy_from.src_version = src_version;
5276 op->copy_from.flags = copy_from_flags;
5277 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5278
5279 p = page_address(pages[0]);
5280 end = p + PAGE_SIZE;
5281 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5282 encode_oloc(&p, end, src_oloc);
78beb0ff
LH		 5283 ceph_encode_32(&p, truncate_seq);
5284 ceph_encode_64(&p, truncate_size);
23ddf9be
LH		 5285 op->indata_len = PAGE_SIZE - (end - p);
5286
5287 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5288 op->indata_len, 0, false, true);
5289 return 0;
5290}
aca39d9e 5291EXPORT_SYMBOL(osd_req_op_copy_from_init);
23ddf9be 5292
57a35dfb 5293int __init ceph_osdc_setup(void)
5522ae0b 5294{
3f1af42a
ID		 5295 size_t size = sizeof(struct ceph_osd_request) +
5296 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5297
5522ae0b 5298 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 5299 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5300 0, 0, NULL);
5522ae0b
AE		 5301
5302 return ceph_osd_request_cache ? 0 : -ENOMEM;
5303}
5522ae0b
AE		 5304
5305void ceph_osdc_cleanup(void)
5306{
5307 BUG_ON(!ceph_osd_request_cache);
5308 kmem_cache_destroy(ceph_osd_request_cache);
5309 ceph_osd_request_cache = NULL;
5310}
5522ae0b 5311
f24e9980
SW		 5312/*
5313 * handle incoming message
5314 */
4972cf60 5315static void osd_dispatch(struct ceph_connection *con, struct ceph_msg *msg)
f24e9980
SW		 5316{
5317 struct ceph_osd *osd = con->private;
5aea3dcd 5318 struct ceph_osd_client *osdc = osd->o_osdc;
f24e9980
SW		 5319 int type = le16_to_cpu(msg->hdr.type);
5320
f24e9980
SW		 5321 switch (type) {
5322 case CEPH_MSG_OSD_MAP:
5323 ceph_osdc_handle_map(osdc, msg);
5324 break;
5325 case CEPH_MSG_OSD_OPREPLY:
5aea3dcd 5326 handle_reply(osd, msg);
f24e9980 5327 break;
a02a946d
ID		 5328 case CEPH_MSG_OSD_BACKOFF:
5329 handle_backoff(osd, msg);
5330 break;
a40c4f10
YS		 5331 case CEPH_MSG_WATCH_NOTIFY:
5332 handle_watch_notify(osdc, msg);
5333 break;
f24e9980
SW		 5334
5335 default:
5336 pr_err("received unknown message type %d %s\n", type,
5337 ceph_msg_type_name(type));
5338 }
5aea3dcd 5339
f24e9980
SW		 5340 ceph_msg_put(msg);
5341}
5342
5b3a4db3 5343/*
d15f9d69
ID		 5344 * Lookup and return message for incoming reply. Don't try to do
5345 * anything about a larger than preallocated data portion of the
5346 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 5347 */
5348static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 5349 struct ceph_msg_header *hdr,
5350 int *skip)
f24e9980
SW		 5351{
5352 struct ceph_osd *osd = con->private;
5353 struct ceph_osd_client *osdc = osd->o_osdc;
5aea3dcd 5354 struct ceph_msg *m = NULL;
0547a9b3 5355 struct ceph_osd_request *req;
3f0a4ac5 5356 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 5357 int data_len = le32_to_cpu(hdr->data_len);
5aea3dcd 5358 u64 tid = le64_to_cpu(hdr->tid);
f24e9980 5359
5aea3dcd
ID		 5360 down_read(&osdc->lock);
5361 if (!osd_registered(osd)) {
5362 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5363 *skip = 1;
5364 goto out_unlock_osdc;
5365 }
5366 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5367
5368 mutex_lock(&osd->lock);
5369 req = lookup_request(&osd->o_requests, tid);
0547a9b3 5370 if (!req) {
cd8140c6
ID		 5371 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5372 osd->o_osd, tid);
d15f9d69 5373 *skip = 1;
5aea3dcd 5374 goto out_unlock_session;
0547a9b3 5375 }
c16e7869 5376
ace6d3a9 5377 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 5378
f2be82b0 5379 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 5380 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5381 __func__, osd->o_osd, req->r_tid, front_len,
5382 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 5383 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5384 false);
a79832f2 5385 if (!m)
5aea3dcd 5386 goto out_unlock_session;
c16e7869
SW		 5387 ceph_msg_put(req->r_reply);
5388 req->r_reply = m;
5389 }
0fff87ec 5390
d15f9d69
ID		 5391 if (data_len > req->r_reply->data_length) {
5392 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5393 __func__, osd->o_osd, req->r_tid, data_len,
5394 req->r_reply->data_length);
5395 m = NULL;
5396 *skip = 1;
5aea3dcd 5397 goto out_unlock_session;
0547a9b3 5398 }
d15f9d69
ID		 5399
5400 m = ceph_msg_get(req->r_reply);
c16e7869 5401 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3 5402
5aea3dcd
ID		 5403out_unlock_session:
5404 mutex_unlock(&osd->lock);
5405out_unlock_osdc:
5406 up_read(&osdc->lock);
2450418c 5407 return m;
5b3a4db3
SW		 5408}
5409
19079203
ID		 5410static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5411{
5412 struct ceph_msg *m;
5413 int type = le16_to_cpu(hdr->type);
5414 u32 front_len = le32_to_cpu(hdr->front_len);
5415 u32 data_len = le32_to_cpu(hdr->data_len);
5416
0d9c1ab3 5417 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
19079203
ID		 5418 if (!m)
5419 return NULL;
5420
5421 if (data_len) {
5422 struct page **pages;
19079203
ID		 5423
5424 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5425 GFP_NOIO);
c22e853a 5426 if (IS_ERR(pages)) {
19079203
ID		 5427 ceph_msg_put(m);
5428 return NULL;
5429 }
5430
e8862740 5431 ceph_msg_data_add_pages(m, pages, data_len, 0, true);
19079203
ID		 5432 }
5433
5434 return m;
5435}
5436
4972cf60
ID		 5437static struct ceph_msg *osd_alloc_msg(struct ceph_connection *con,
5438 struct ceph_msg_header *hdr,
5439 int *skip)
5b3a4db3
SW		 5440{
5441 struct ceph_osd *osd = con->private;
5442 int type = le16_to_cpu(hdr->type);
5b3a4db3 5443
1c20f2d2 5444 *skip = 0;
5b3a4db3
SW		 5445 switch (type) {
5446 case CEPH_MSG_OSD_MAP:
a02a946d 5447 case CEPH_MSG_OSD_BACKOFF:
a40c4f10 5448 case CEPH_MSG_WATCH_NOTIFY:
19079203 5449 return alloc_msg_with_page_vector(hdr);
5b3a4db3
SW		 5450 case CEPH_MSG_OSD_OPREPLY:
5451 return get_reply(con, hdr, skip);
5452 default:
5aea3dcd
ID		 5453 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5454 osd->o_osd, type);
5b3a4db3
SW		 5455 *skip = 1;
5456 return NULL;
5457 }
f24e9980
SW		 5458}
5459
5460/*
5461 * Wrappers to refcount containing ceph_osd struct
5462 */
4972cf60 5463static struct ceph_connection *osd_get_con(struct ceph_connection *con)
f24e9980
SW		 5464{
5465 struct ceph_osd *osd = con->private;
5466 if (get_osd(osd))
5467 return con;
5468 return NULL;
5469}
5470
4972cf60 5471static void osd_put_con(struct ceph_connection *con)
f24e9980
SW		 5472{
5473 struct ceph_osd *osd = con->private;
5474 put_osd(osd);
5475}
5476
4e7a5dcd
SW		 5477/*
5478 * authentication
5479 */
cd1a677c 5480
a3530df3
AE		 5481/*
5482 * Note: returned pointer is the address of a structure that's
5483 * managed separately. Caller must *not* attempt to free it.
5484 */
4972cf60
ID		 5485static struct ceph_auth_handshake *
5486osd_get_authorizer(struct ceph_connection *con, int *proto, int force_new)
4e7a5dcd
SW		 5487{
5488 struct ceph_osd *o = con->private;
5489 struct ceph_osd_client *osdc = o->o_osdc;
5490 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 5491 struct ceph_auth_handshake *auth = &o->o_auth;
ce287162 5492 int ret;
4e7a5dcd 5493
ce287162
ID		 5494 ret = __ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD,
5495 force_new, proto, NULL, NULL);
5496 if (ret)
5497 return ERR_PTR(ret);
74f1869f 5498
a3530df3 5499 return auth;
4e7a5dcd
SW		 5500}
5501
4972cf60 5502static int osd_add_authorizer_challenge(struct ceph_connection *con,
6daca13d
ID		 5503 void *challenge_buf, int challenge_buf_len)
5504{
5505 struct ceph_osd *o = con->private;
5506 struct ceph_osd_client *osdc = o->o_osdc;
5507 struct ceph_auth_client *ac = osdc->client->monc.auth;
5508
5509 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5510 challenge_buf, challenge_buf_len);
5511}
4e7a5dcd 5512
4972cf60 5513static int osd_verify_authorizer_reply(struct ceph_connection *con)
4e7a5dcd
SW		 5514{
5515 struct ceph_osd *o = con->private;
5516 struct ceph_osd_client *osdc = o->o_osdc;
5517 struct ceph_auth_client *ac = osdc->client->monc.auth;
285ea34f 5518 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 5519
285ea34f
ID		 5520 return ceph_auth_verify_authorizer_reply(ac, auth->authorizer,
5521 auth->authorizer_reply_buf, auth->authorizer_reply_buf_len,
5522 NULL, NULL, NULL, NULL);
4e7a5dcd
SW		 5523}
5524
4972cf60 5525static int osd_invalidate_authorizer(struct ceph_connection *con)
9bd2e6f8
SW		 5526{
5527 struct ceph_osd *o = con->private;
5528 struct ceph_osd_client *osdc = o->o_osdc;
5529 struct ceph_auth_client *ac = osdc->client->monc.auth;
5530
27859f97 5531 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 5532 return ceph_monc_validate_auth(&osdc->client->monc);
5533}
4e7a5dcd 5534
cd1a677c
ID		 5535static int osd_get_auth_request(struct ceph_connection *con,
5536 void *buf, int *buf_len,
5537 void **authorizer, int *authorizer_len)
5538{
5539 struct ceph_osd *o = con->private;
5540 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5541 struct ceph_auth_handshake *auth = &o->o_auth;
5542 int ret;
5543
5544 ret = ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD,
5545 buf, buf_len);
5546 if (ret)
5547 return ret;
5548
5549 *authorizer = auth->authorizer_buf;
5550 *authorizer_len = auth->authorizer_buf_len;
5551 return 0;
5552}
5553
5554static int osd_handle_auth_reply_more(struct ceph_connection *con,
5555 void *reply, int reply_len,
5556 void *buf, int *buf_len,
5557 void **authorizer, int *authorizer_len)
5558{
5559 struct ceph_osd *o = con->private;
5560 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5561 struct ceph_auth_handshake *auth = &o->o_auth;
5562 int ret;
5563
5564 ret = ceph_auth_handle_svc_reply_more(ac, auth, reply, reply_len,
5565 buf, buf_len);
5566 if (ret)
5567 return ret;
5568
5569 *authorizer = auth->authorizer_buf;
5570 *authorizer_len = auth->authorizer_buf_len;
5571 return 0;
5572}
5573
5574static int osd_handle_auth_done(struct ceph_connection *con,
5575 u64 global_id, void *reply, int reply_len,
5576 u8 *session_key, int *session_key_len,
5577 u8 *con_secret, int *con_secret_len)
5578{
5579 struct ceph_osd *o = con->private;
5580 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth;
5581 struct ceph_auth_handshake *auth = &o->o_auth;
5582
5583 return ceph_auth_handle_svc_reply_done(ac, auth, reply, reply_len,
5584 session_key, session_key_len,
5585 con_secret, con_secret_len);
5586}
5587
5588static int osd_handle_auth_bad_method(struct ceph_connection *con,
5589 int used_proto, int result,
5590 const int *allowed_protos, int proto_cnt,
5591 const int *allowed_modes, int mode_cnt)
5592{
5593 struct ceph_osd *o = con->private;
5594 struct ceph_mon_client *monc = &o->o_osdc->client->monc;
5595 int ret;
5596
5597 if (ceph_auth_handle_bad_authorizer(monc->auth, CEPH_ENTITY_TYPE_OSD,
5598 used_proto, result,
5599 allowed_protos, proto_cnt,
5600 allowed_modes, mode_cnt)) {
5601 ret = ceph_monc_validate_auth(monc);
5602 if (ret)
5603 return ret;
5604 }
5605
5606 return -EACCES;
5607}
5608
8cb441c0
ID		 5609static void osd_reencode_message(struct ceph_msg *msg)
5610{
914902af
ID		 5611 int type = le16_to_cpu(msg->hdr.type);
5612
5613 if (type == CEPH_MSG_OSD_OP)
5614 encode_request_finish(msg);
8cb441c0
ID		 5615}
5616
79dbd1ba 5617static int osd_sign_message(struct ceph_msg *msg)
33d07337 5618{
79dbd1ba 5619 struct ceph_osd *o = msg->con->private;
33d07337 5620 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5621
33d07337
YZ		 5622 return ceph_auth_sign_message(auth, msg);
5623}
5624
79dbd1ba 5625static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 5626{
79dbd1ba 5627 struct ceph_osd *o = msg->con->private;
33d07337 5628 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5629
33d07337
YZ		 5630 return ceph_auth_check_message_signature(auth, msg);
5631}
5632
9e32789f 5633static const struct ceph_connection_operations osd_con_ops = {
4972cf60
ID		 5634 .get = osd_get_con,
5635 .put = osd_put_con,
5636 .alloc_msg = osd_alloc_msg,
5637 .dispatch = osd_dispatch,
5638 .fault = osd_fault,
8cb441c0 5639 .reencode_message = osd_reencode_message,
4972cf60
ID		 5640 .get_authorizer = osd_get_authorizer,
5641 .add_authorizer_challenge = osd_add_authorizer_challenge,
5642 .verify_authorizer_reply = osd_verify_authorizer_reply,
5643 .invalidate_authorizer = osd_invalidate_authorizer,
79dbd1ba
ID		 5644 .sign_message = osd_sign_message,
5645 .check_message_signature = osd_check_message_signature,
cd1a677c
ID		 5646 .get_auth_request = osd_get_auth_request,
5647 .handle_auth_reply_more = osd_handle_auth_reply_more,
5648 .handle_auth_done = osd_handle_auth_done,
5649 .handle_auth_bad_method = osd_handle_auth_bad_method,
f24e9980 5650};
Linux 6.x block layer and io_uring tree(s)