projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ceph: filter out used flags when printing unused open flags
[linux-2.6-block.git] / net / ceph / osd_client.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
a4ce40a9 2
3d14c5d2 3#include <linux/ceph/ceph_debug.h>
f24e9980 4
3d14c5d2 5#include <linux/module.h>
f24e9980
SW		 6#include <linux/err.h>
7#include <linux/highmem.h>
8#include <linux/mm.h>
9#include <linux/pagemap.h>
10#include <linux/slab.h>
11#include <linux/uaccess.h>
68b4476b
YS		 12#ifdef CONFIG_BLOCK
13#include <linux/bio.h>
14#endif
f24e9980 15
8cb441c0 16#include <linux/ceph/ceph_features.h>
3d14c5d2
YS		 17#include <linux/ceph/libceph.h>
18#include <linux/ceph/osd_client.h>
19#include <linux/ceph/messenger.h>
20#include <linux/ceph/decode.h>
21#include <linux/ceph/auth.h>
22#include <linux/ceph/pagelist.h>
08c1ac50 23#include <linux/ceph/striper.h>
f24e9980 24
c16e7869 25#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 26
5522ae0b
AE		 27static struct kmem_cache *ceph_osd_request_cache;
28
9e32789f 29static const struct ceph_connection_operations osd_con_ops;
f24e9980 30
f24e9980
SW		 31/*
32 * Implement client access to distributed object storage cluster.
33 *
34 * All data objects are stored within a cluster/cloud of OSDs, or
35 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
36 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
37 * remote daemons serving up and coordinating consistent and safe
38 * access to storage.
39 *
40 * Cluster membership and the mapping of data objects onto storage devices
41 * are described by the osd map.
42 *
43 * We keep track of pending OSD requests (read, write), resubmit
44 * requests to different OSDs when the cluster topology/data layout
45 * change, or retry the affected requests when the communications
46 * channel with an OSD is reset.
47 */
48
5aea3dcd
ID		 49static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
50static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
922dab61
ID		 51static void link_linger(struct ceph_osd *osd,
52 struct ceph_osd_linger_request *lreq);
53static void unlink_linger(struct ceph_osd *osd,
54 struct ceph_osd_linger_request *lreq);
a02a946d 55static void clear_backoffs(struct ceph_osd *osd);
5aea3dcd
ID		 56
57#if 1
58static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
59{
60 bool wrlocked = true;
61
62 if (unlikely(down_read_trylock(sem))) {
63 wrlocked = false;
64 up_read(sem);
65 }
66
67 return wrlocked;
68}
69static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
70{
71 WARN_ON(!rwsem_is_locked(&osdc->lock));
72}
73static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
74{
75 WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
76}
77static inline void verify_osd_locked(struct ceph_osd *osd)
78{
79 struct ceph_osd_client *osdc = osd->o_osdc;
80
81 WARN_ON(!(mutex_is_locked(&osd->lock) &&
82 rwsem_is_locked(&osdc->lock)) &&
83 !rwsem_is_wrlocked(&osdc->lock));
84}
922dab61
ID		 85static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
86{
87 WARN_ON(!mutex_is_locked(&lreq->lock));
88}
5aea3dcd
ID		 89#else
90static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
91static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
92static inline void verify_osd_locked(struct ceph_osd *osd) { }
922dab61 93static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
5aea3dcd
ID		 94#endif
95
f24e9980
SW		 96/*
97 * calculate the mapping of a file extent onto an object, and fill out the
98 * request accordingly. shorten extent as necessary if it crosses an
99 * object boundary.
100 *
101 * fill osd op in request message.
102 */
dbe0fc41 103static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 104 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 105{
60e56f13 106 u64 orig_len = *plen;
dccbf080 107 u32 xlen;
f24e9980 108
60e56f13 109 /* object extent? */
dccbf080
ID		 110 ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
111 objoff, &xlen);
112 *objlen = xlen;
75d1c941
AE		 113 if (*objlen < orig_len) {
114 *plen = *objlen;
60e56f13
AE		 115 dout(" skipping last %llu, final file extent %llu~%llu\n",
116 orig_len - *plen, off, *plen);
117 }
118
75d1c941 119 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
3ff5f385 120 return 0;
f24e9980
SW		 121}
122
c54d47bf
AE		 123static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
124{
125 memset(osd_data, 0, sizeof (*osd_data));
126 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
127}
128
a4ce40a9 129static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 130 struct page **pages, u64 length, u32 alignment,
131 bool pages_from_pool, bool own_pages)
132{
133 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
134 osd_data->pages = pages;
135 osd_data->length = length;
136 osd_data->alignment = alignment;
137 osd_data->pages_from_pool = pages_from_pool;
138 osd_data->own_pages = own_pages;
139}
43bfe5de 140
a4ce40a9 141static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 142 struct ceph_pagelist *pagelist)
143{
144 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
145 osd_data->pagelist = pagelist;
146}
43bfe5de
AE		 147
148#ifdef CONFIG_BLOCK
a4ce40a9 149static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
5359a17d
ID		 150 struct ceph_bio_iter *bio_pos,
151 u32 bio_length)
43bfe5de
AE		 152{
153 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
5359a17d 154 osd_data->bio_pos = *bio_pos;
43bfe5de
AE		 155 osd_data->bio_length = bio_length;
156}
43bfe5de
AE		 157#endif /* CONFIG_BLOCK */
158
b9e281c2
ID		 159static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
160 struct ceph_bvec_iter *bvec_pos)
161{
162 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
163 osd_data->bvec_pos = *bvec_pos;
164}
165
8a703a38
IC		 166#define osd_req_op_data(oreq, whch, typ, fld) \
167({ \
168 struct ceph_osd_request *__oreq = (oreq); \
169 unsigned int __whch = (whch); \
170 BUG_ON(__whch >= __oreq->r_num_ops); \
171 &__oreq->r_ops[__whch].typ.fld; \
172})
863c7eb5 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
b9e281c2
ID		 240void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
241 unsigned int which,
242 struct ceph_bvec_iter *bvec_pos)
243{
244 struct ceph_osd_data *osd_data;
245
246 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
247 ceph_osd_data_bvecs_init(osd_data, bvec_pos);
248}
249EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
250
a4ce40a9
AE		 251static void osd_req_op_cls_request_info_pagelist(
252 struct ceph_osd_request *osd_req,
253 unsigned int which, struct ceph_pagelist *pagelist)
254{
255 struct ceph_osd_data *osd_data;
256
863c7eb5 257 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 258 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 259}
260
04017e29
AE		 261void osd_req_op_cls_request_data_pagelist(
262 struct ceph_osd_request *osd_req,
263 unsigned int which, struct ceph_pagelist *pagelist)
264{
265 struct ceph_osd_data *osd_data;
266
863c7eb5 267 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29 268 ceph_osd_data_pagelist_init(osd_data, pagelist);
bb873b53
ID		 269 osd_req->r_ops[which].cls.indata_len += pagelist->length;
270 osd_req->r_ops[which].indata_len += pagelist->length;
04017e29
AE		 271}
272EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
273
6c57b554
AE		 274void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
275 unsigned int which, struct page **pages, u64 length,
276 u32 alignment, bool pages_from_pool, bool own_pages)
277{
278 struct ceph_osd_data *osd_data;
279
280 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
281 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
282 pages_from_pool, own_pages);
bb873b53
ID		 283 osd_req->r_ops[which].cls.indata_len += length;
284 osd_req->r_ops[which].indata_len += length;
6c57b554
AE		 285}
286EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
287
b9e281c2
ID		 288void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
289 unsigned int which,
290 struct bio_vec *bvecs, u32 bytes)
291{
292 struct ceph_osd_data *osd_data;
293 struct ceph_bvec_iter it = {
294 .bvecs = bvecs,
295 .iter = { .bi_size = bytes },
296 };
297
298 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
299 ceph_osd_data_bvecs_init(osd_data, &it);
300 osd_req->r_ops[which].cls.indata_len += bytes;
301 osd_req->r_ops[which].indata_len += bytes;
302}
303EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
304
a4ce40a9
AE		 305void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
306 unsigned int which, struct page **pages, u64 length,
307 u32 alignment, bool pages_from_pool, bool own_pages)
308{
309 struct ceph_osd_data *osd_data;
310
863c7eb5 311 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 312 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
313 pages_from_pool, own_pages);
a4ce40a9
AE		 314}
315EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
316
23c08a9c
AE		 317static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
318{
319 switch (osd_data->type) {
320 case CEPH_OSD_DATA_TYPE_NONE:
321 return 0;
322 case CEPH_OSD_DATA_TYPE_PAGES:
323 return osd_data->length;
324 case CEPH_OSD_DATA_TYPE_PAGELIST:
325 return (u64)osd_data->pagelist->length;
326#ifdef CONFIG_BLOCK
327 case CEPH_OSD_DATA_TYPE_BIO:
328 return (u64)osd_data->bio_length;
329#endif /* CONFIG_BLOCK */
b9e281c2
ID		 330 case CEPH_OSD_DATA_TYPE_BVECS:
331 return osd_data->bvec_pos.iter.bi_size;
23c08a9c
AE		 332 default:
333 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
334 return 0;
335 }
336}
337
c54d47bf
AE		 338static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
339{
5476492f 340 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 341 int num_pages;
342
343 num_pages = calc_pages_for((u64)osd_data->alignment,
344 (u64)osd_data->length);
345 ceph_release_page_vector(osd_data->pages, num_pages);
346 }
5476492f
AE		 347 ceph_osd_data_init(osd_data);
348}
349
350static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
351 unsigned int which)
352{
353 struct ceph_osd_req_op *op;
354
355 BUG_ON(which >= osd_req->r_num_ops);
356 op = &osd_req->r_ops[which];
357
358 switch (op->op) {
359 case CEPH_OSD_OP_READ:
360 case CEPH_OSD_OP_WRITE:
e30b7577 361 case CEPH_OSD_OP_WRITEFULL:
5476492f
AE		 362 ceph_osd_data_release(&op->extent.osd_data);
363 break;
364 case CEPH_OSD_OP_CALL:
365 ceph_osd_data_release(&op->cls.request_info);
04017e29 366 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 367 ceph_osd_data_release(&op->cls.response_data);
368 break;
d74b50be
YZ		 369 case CEPH_OSD_OP_SETXATTR:
370 case CEPH_OSD_OP_CMPXATTR:
371 ceph_osd_data_release(&op->xattr.osd_data);
372 break;
66ba609f
YZ		 373 case CEPH_OSD_OP_STAT:
374 ceph_osd_data_release(&op->raw_data_in);
375 break;
922dab61
ID		 376 case CEPH_OSD_OP_NOTIFY_ACK:
377 ceph_osd_data_release(&op->notify_ack.request_data);
378 break;
19079203
ID		 379 case CEPH_OSD_OP_NOTIFY:
380 ceph_osd_data_release(&op->notify.request_data);
381 ceph_osd_data_release(&op->notify.response_data);
382 break;
a4ed38d7
DF		 383 case CEPH_OSD_OP_LIST_WATCHERS:
384 ceph_osd_data_release(&op->list_watchers.response_data);
385 break;
5476492f
AE		 386 default:
387 break;
388 }
c54d47bf
AE		 389}
390
63244fa1
ID		 391/*
392 * Assumes @t is zero-initialized.
393 */
394static void target_init(struct ceph_osd_request_target *t)
395{
396 ceph_oid_init(&t->base_oid);
397 ceph_oloc_init(&t->base_oloc);
398 ceph_oid_init(&t->target_oid);
399 ceph_oloc_init(&t->target_oloc);
400
401 ceph_osds_init(&t->acting);
402 ceph_osds_init(&t->up);
403 t->size = -1;
404 t->min_size = -1;
405
406 t->osd = CEPH_HOMELESS_OSD;
407}
408
922dab61
ID		 409static void target_copy(struct ceph_osd_request_target *dest,
410 const struct ceph_osd_request_target *src)
411{
412 ceph_oid_copy(&dest->base_oid, &src->base_oid);
413 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
414 ceph_oid_copy(&dest->target_oid, &src->target_oid);
415 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
416
417 dest->pgid = src->pgid; /* struct */
dc98ff72 418 dest->spgid = src->spgid; /* struct */
922dab61
ID		 419 dest->pg_num = src->pg_num;
420 dest->pg_num_mask = src->pg_num_mask;
421 ceph_osds_copy(&dest->acting, &src->acting);
422 ceph_osds_copy(&dest->up, &src->up);
423 dest->size = src->size;
424 dest->min_size = src->min_size;
425 dest->sort_bitwise = src->sort_bitwise;
426
427 dest->flags = src->flags;
428 dest->paused = src->paused;
429
04c7d789 430 dest->epoch = src->epoch;
dc93e0e2
ID		 431 dest->last_force_resend = src->last_force_resend;
432
922dab61
ID		 433 dest->osd = src->osd;
434}
435
63244fa1
ID		 436static void target_destroy(struct ceph_osd_request_target *t)
437{
438 ceph_oid_destroy(&t->base_oid);
30c156d9 439 ceph_oloc_destroy(&t->base_oloc);
63244fa1 440 ceph_oid_destroy(&t->target_oid);
30c156d9 441 ceph_oloc_destroy(&t->target_oloc);
63244fa1
ID		 442}
443
f24e9980
SW		 444/*
445 * requests
446 */
3540bfdb
ID		 447static void request_release_checks(struct ceph_osd_request *req)
448{
449 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
4609245e 450 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
3540bfdb
ID		 451 WARN_ON(!list_empty(&req->r_unsafe_item));
452 WARN_ON(req->r_osd);
453}
454
9e94af20 455static void ceph_osdc_release_request(struct kref *kref)
f24e9980 456{
9e94af20
ID		 457 struct ceph_osd_request *req = container_of(kref,
458 struct ceph_osd_request, r_kref);
5476492f 459 unsigned int which;
415e49a9 460
9e94af20
ID		 461 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
462 req->r_request, req->r_reply);
3540bfdb 463 request_release_checks(req);
9e94af20 464
415e49a9
SW		 465 if (req->r_request)
466 ceph_msg_put(req->r_request);
5aea3dcd 467 if (req->r_reply)
ab8cb34a 468 ceph_msg_put(req->r_reply);
0fff87ec 469
5476492f
AE		 470 for (which = 0; which < req->r_num_ops; which++)
471 osd_req_op_data_release(req, which);
0fff87ec 472
a66dd383 473 target_destroy(&req->r_t);
415e49a9 474 ceph_put_snap_context(req->r_snapc);
d30291b9 475
415e49a9
SW		 476 if (req->r_mempool)
477 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 478 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 479 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 480 else
481 kfree(req);
f24e9980 482}
9e94af20
ID		 483
484void ceph_osdc_get_request(struct ceph_osd_request *req)
485{
486 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 487 kref_read(&req->r_kref));
9e94af20
ID		 488 kref_get(&req->r_kref);
489}
490EXPORT_SYMBOL(ceph_osdc_get_request);
491
492void ceph_osdc_put_request(struct ceph_osd_request *req)
493{
3ed97d63
ID		 494 if (req) {
495 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 496 kref_read(&req->r_kref));
3ed97d63
ID		 497 kref_put(&req->r_kref, ceph_osdc_release_request);
498 }
9e94af20
ID		 499}
500EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 501
3540bfdb
ID		 502static void request_init(struct ceph_osd_request *req)
503{
504 /* req only, each op is zeroed in _osd_req_op_init() */
505 memset(req, 0, sizeof(*req));
506
507 kref_init(&req->r_kref);
508 init_completion(&req->r_completion);
3540bfdb 509 RB_CLEAR_NODE(&req->r_node);
4609245e 510 RB_CLEAR_NODE(&req->r_mc_node);
3540bfdb
ID		 511 INIT_LIST_HEAD(&req->r_unsafe_item);
512
513 target_init(&req->r_t);
514}
515
922dab61
ID		 516/*
517 * This is ugly, but it allows us to reuse linger registration and ping
518 * requests, keeping the structure of the code around send_linger{_ping}()
519 * reasonable. Setting up a min_nr=2 mempool for each linger request
520 * and dealing with copying ops (this blasts req only, watch op remains
521 * intact) isn't any better.
522 */
523static void request_reinit(struct ceph_osd_request *req)
524{
525 struct ceph_osd_client *osdc = req->r_osdc;
526 bool mempool = req->r_mempool;
527 unsigned int num_ops = req->r_num_ops;
528 u64 snapid = req->r_snapid;
529 struct ceph_snap_context *snapc = req->r_snapc;
530 bool linger = req->r_linger;
531 struct ceph_msg *request_msg = req->r_request;
532 struct ceph_msg *reply_msg = req->r_reply;
533
534 dout("%s req %p\n", __func__, req);
2c935bc5 535 WARN_ON(kref_read(&req->r_kref) != 1);
922dab61
ID		 536 request_release_checks(req);
537
2c935bc5
PZ		 538 WARN_ON(kref_read(&request_msg->kref) != 1);
539 WARN_ON(kref_read(&reply_msg->kref) != 1);
922dab61
ID		 540 target_destroy(&req->r_t);
541
542 request_init(req);
543 req->r_osdc = osdc;
544 req->r_mempool = mempool;
545 req->r_num_ops = num_ops;
546 req->r_snapid = snapid;
547 req->r_snapc = snapc;
548 req->r_linger = linger;
549 req->r_request = request_msg;
550 req->r_reply = reply_msg;
551}
552
3499e8a5 553struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 554 struct ceph_snap_context *snapc,
1b83bef2 555 unsigned int num_ops,
3499e8a5 556 bool use_mempool,
54a54007 557 gfp_t gfp_flags)
f24e9980
SW		 558{
559 struct ceph_osd_request *req;
1b83bef2 560
f24e9980 561 if (use_mempool) {
3f1af42a 562 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 563 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 564 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
565 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 566 } else {
3f1af42a
ID		 567 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
568 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
569 gfp_flags);
f24e9980 570 }
3f1af42a 571 if (unlikely(!req))
a79832f2 572 return NULL;
f24e9980 573
3540bfdb 574 request_init(req);
f24e9980
SW		 575 req->r_osdc = osdc;
576 req->r_mempool = use_mempool;
79528734 577 req->r_num_ops = num_ops;
84127282
ID		 578 req->r_snapid = CEPH_NOSNAP;
579 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 580
13d1ad16
ID		 581 dout("%s req %p\n", __func__, req);
582 return req;
583}
584EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 585
2e59ffd1 586static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
30c156d9
YZ		 587{
588 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
589}
590
13d1ad16
ID		 591int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
592{
593 struct ceph_osd_client *osdc = req->r_osdc;
594 struct ceph_msg *msg;
595 int msg_size;
c16e7869 596
d30291b9 597 WARN_ON(ceph_oid_empty(&req->r_base_oid));
30c156d9 598 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
d30291b9 599
13d1ad16 600 /* create request message */
8cb441c0
ID		 601 msg_size = CEPH_ENCODING_START_BLK_LEN +
602 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
603 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
604 msg_size += CEPH_ENCODING_START_BLK_LEN +
605 sizeof(struct ceph_osd_reqid); /* reqid */
606 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
607 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
30c156d9
YZ		 608 msg_size += CEPH_ENCODING_START_BLK_LEN +
609 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
13d1ad16
ID		 610 msg_size += 4 + req->r_base_oid.name_len; /* oid */
611 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 612 msg_size += 8; /* snapid */
613 msg_size += 8; /* snap_seq */
13d1ad16 614 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
8cb441c0 615 msg_size += 4 + 8; /* retry_attempt, features */
ae458f5a 616
13d1ad16 617 if (req->r_mempool)
8f3bc053 618 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 619 else
13d1ad16
ID		 620 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
621 if (!msg)
622 return -ENOMEM;
68b4476b 623
f24e9980 624 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 625 req->r_request = msg;
3499e8a5 626
13d1ad16
ID		 627 /* create reply message */
628 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 629 msg_size += req->r_base_oid.name_len;
630 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 631
632 if (req->r_mempool)
633 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
634 else
635 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
636 if (!msg)
637 return -ENOMEM;
638
639 req->r_reply = msg;
640
641 return 0;
3499e8a5 642}
13d1ad16 643EXPORT_SYMBOL(ceph_osdc_alloc_messages);
3499e8a5 644
a8dd0a37 645static bool osd_req_opcode_valid(u16 opcode)
68b4476b 646{
a8dd0a37 647 switch (opcode) {
70b5bfa3
ID		 648#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
649__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
650#undef GENERATE_CASE
a8dd0a37
AE		 651 default:
652 return false;
653 }
654}
655
33803f33
AE		 656/*
657 * This is an osd op init function for opcodes that have no data or
658 * other information associated with them. It also serves as a
659 * common init routine for all the other init functions, below.
660 */
c99d2d4a 661static struct ceph_osd_req_op *
49719778 662_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 663 u16 opcode, u32 flags)
33803f33 664{
c99d2d4a
AE		 665 struct ceph_osd_req_op *op;
666
667 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 668 BUG_ON(!osd_req_opcode_valid(opcode));
669
c99d2d4a 670 op = &osd_req->r_ops[which];
33803f33 671 memset(op, 0, sizeof (*op));
33803f33 672 op->op = opcode;
144cba14 673 op->flags = flags;
c99d2d4a
AE		 674
675 return op;
33803f33
AE		 676}
677
49719778 678void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 679 unsigned int which, u16 opcode, u32 flags)
49719778 680{
144cba14 681 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 682}
683EXPORT_SYMBOL(osd_req_op_init);
684
c99d2d4a
AE		 685void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
686 unsigned int which, u16 opcode,
33803f33
AE		 687 u64 offset, u64 length,
688 u64 truncate_size, u32 truncate_seq)
689{
144cba14
YZ		 690 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
691 opcode, 0);
33803f33
AE		 692 size_t payload_len = 0;
693
ad7a60de 694 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 695 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
696 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 697
33803f33
AE		 698 op->extent.offset = offset;
699 op->extent.length = length;
700 op->extent.truncate_size = truncate_size;
701 op->extent.truncate_seq = truncate_seq;
e30b7577 702 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 703 payload_len += length;
704
de2aa102 705 op->indata_len = payload_len;
33803f33
AE		 706}
707EXPORT_SYMBOL(osd_req_op_extent_init);
708
c99d2d4a
AE		 709void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
710 unsigned int which, u64 length)
e5975c7c 711{
c99d2d4a
AE		 712 struct ceph_osd_req_op *op;
713 u64 previous;
714
715 BUG_ON(which >= osd_req->r_num_ops);
716 op = &osd_req->r_ops[which];
717 previous = op->extent.length;
e5975c7c
AE		 718
719 if (length == previous)
720 return; /* Nothing to do */
721 BUG_ON(length > previous);
722
723 op->extent.length = length;
d641df81
YZ		 724 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
725 op->indata_len -= previous - length;
e5975c7c
AE		 726}
727EXPORT_SYMBOL(osd_req_op_extent_update);
728
2c63f49a
YZ		 729void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
730 unsigned int which, u64 offset_inc)
731{
732 struct ceph_osd_req_op *op, *prev_op;
733
734 BUG_ON(which + 1 >= osd_req->r_num_ops);
735
736 prev_op = &osd_req->r_ops[which];
737 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
738 /* dup previous one */
739 op->indata_len = prev_op->indata_len;
740 op->outdata_len = prev_op->outdata_len;
741 op->extent = prev_op->extent;
742 /* adjust offset */
743 op->extent.offset += offset_inc;
744 op->extent.length -= offset_inc;
745
746 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
747 op->indata_len -= offset_inc;
748}
749EXPORT_SYMBOL(osd_req_op_extent_dup_last);
750
c99d2d4a 751void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 752 u16 opcode, const char *class, const char *method)
33803f33 753{
144cba14
YZ		 754 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
755 opcode, 0);
5f562df5 756 struct ceph_pagelist *pagelist;
33803f33
AE		 757 size_t payload_len = 0;
758 size_t size;
759
760 BUG_ON(opcode != CEPH_OSD_OP_CALL);
761
5f562df5
AE		 762 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
763 BUG_ON(!pagelist);
764 ceph_pagelist_init(pagelist);
765
33803f33
AE		 766 op->cls.class_name = class;
767 size = strlen(class);
768 BUG_ON(size > (size_t) U8_MAX);
769 op->cls.class_len = size;
5f562df5 770 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 771 payload_len += size;
772
773 op->cls.method_name = method;
774 size = strlen(method);
775 BUG_ON(size > (size_t) U8_MAX);
776 op->cls.method_len = size;
5f562df5 777 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 778 payload_len += size;
779
a4ce40a9 780 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 781
de2aa102 782 op->indata_len = payload_len;
33803f33
AE		 783}
784EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 785
d74b50be
YZ		 786int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
787 u16 opcode, const char *name, const void *value,
788 size_t size, u8 cmp_op, u8 cmp_mode)
789{
144cba14
YZ		 790 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
791 opcode, 0);
d74b50be
YZ		 792 struct ceph_pagelist *pagelist;
793 size_t payload_len;
794
795 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
796
797 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
798 if (!pagelist)
799 return -ENOMEM;
800
801 ceph_pagelist_init(pagelist);
802
803 payload_len = strlen(name);
804 op->xattr.name_len = payload_len;
805 ceph_pagelist_append(pagelist, name, payload_len);
806
807 op->xattr.value_len = size;
808 ceph_pagelist_append(pagelist, value, size);
809 payload_len += size;
810
811 op->xattr.cmp_op = cmp_op;
812 op->xattr.cmp_mode = cmp_mode;
813
814 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 815 op->indata_len = payload_len;
d74b50be
YZ		 816 return 0;
817}
818EXPORT_SYMBOL(osd_req_op_xattr_init);
819
922dab61
ID		 820/*
821 * @watch_opcode: CEPH_OSD_WATCH_OP_*
822 */
823static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
824 u64 cookie, u8 watch_opcode)
33803f33 825{
922dab61 826 struct ceph_osd_req_op *op;
33803f33 827
922dab61 828 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
33803f33 829 op->watch.cookie = cookie;
922dab61
ID		 830 op->watch.op = watch_opcode;
831 op->watch.gen = 0;
33803f33 832}
33803f33 833
c647b8a8
ID		 834void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
835 unsigned int which,
836 u64 expected_object_size,
837 u64 expected_write_size)
838{
839 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 840 CEPH_OSD_OP_SETALLOCHINT,
841 0);
c647b8a8
ID		 842
843 op->alloc_hint.expected_object_size = expected_object_size;
844 op->alloc_hint.expected_write_size = expected_write_size;
845
846 /*
847 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
848 * not worth a feature bit. Set FAILOK per-op flag to make
849 * sure older osds don't trip over an unsupported opcode.
850 */
851 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
852}
853EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
854
90af3602 855static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 856 struct ceph_osd_data *osd_data)
857{
858 u64 length = ceph_osd_data_length(osd_data);
859
860 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
861 BUG_ON(length > (u64) SIZE_MAX);
862 if (length)
90af3602 863 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 864 length, osd_data->alignment);
865 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
866 BUG_ON(!length);
90af3602 867 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 868#ifdef CONFIG_BLOCK
869 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
5359a17d 870 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
ec9123c5 871#endif
b9e281c2
ID		 872 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
873 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
ec9123c5
AE		 874 } else {
875 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
876 }
877}
878
bb873b53
ID		 879static u32 osd_req_encode_op(struct ceph_osd_op *dst,
880 const struct ceph_osd_req_op *src)
a8dd0a37 881{
a8dd0a37
AE		 882 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
883 pr_err("unrecognized osd opcode %d\n", src->op);
884
885 return 0;
886 }
887
888 switch (src->op) {
889 case CEPH_OSD_OP_STAT:
890 break;
891 case CEPH_OSD_OP_READ:
892 case CEPH_OSD_OP_WRITE:
e30b7577 893 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 894 case CEPH_OSD_OP_ZERO:
ad7a60de 895 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37
AE		 896 dst->extent.offset = cpu_to_le64(src->extent.offset);
897 dst->extent.length = cpu_to_le64(src->extent.length);
898 dst->extent.truncate_size =
899 cpu_to_le64(src->extent.truncate_size);
900 dst->extent.truncate_seq =
901 cpu_to_le32(src->extent.truncate_seq);
902 break;
903 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 904 dst->cls.class_len = src->cls.class_len;
905 dst->cls.method_len = src->cls.method_len;
bb873b53 906 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
a8dd0a37 907 break;
a8dd0a37
AE		 908 case CEPH_OSD_OP_WATCH:
909 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
922dab61
ID		 910 dst->watch.ver = cpu_to_le64(0);
911 dst->watch.op = src->watch.op;
912 dst->watch.gen = cpu_to_le32(src->watch.gen);
913 break;
914 case CEPH_OSD_OP_NOTIFY_ACK:
a8dd0a37 915 break;
19079203
ID		 916 case CEPH_OSD_OP_NOTIFY:
917 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
918 break;
a4ed38d7
DF		 919 case CEPH_OSD_OP_LIST_WATCHERS:
920 break;
c647b8a8
ID		 921 case CEPH_OSD_OP_SETALLOCHINT:
922 dst->alloc_hint.expected_object_size =
923 cpu_to_le64(src->alloc_hint.expected_object_size);
924 dst->alloc_hint.expected_write_size =
925 cpu_to_le64(src->alloc_hint.expected_write_size);
926 break;
d74b50be
YZ		 927 case CEPH_OSD_OP_SETXATTR:
928 case CEPH_OSD_OP_CMPXATTR:
929 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
930 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
931 dst->xattr.cmp_op = src->xattr.cmp_op;
932 dst->xattr.cmp_mode = src->xattr.cmp_mode;
d74b50be 933 break;
864e9197
YZ		 934 case CEPH_OSD_OP_CREATE:
935 case CEPH_OSD_OP_DELETE:
936 break;
a8dd0a37 937 default:
4c46459c 938 pr_err("unsupported osd opcode %s\n",
8f63ca2d 939 ceph_osd_op_name(src->op));
4c46459c 940 WARN_ON(1);
a8dd0a37
AE		 941
942 return 0;
68b4476b 943 }
7b25bf5f 944
a8dd0a37 945 dst->op = cpu_to_le16(src->op);
7b25bf5f 946 dst->flags = cpu_to_le32(src->flags);
de2aa102 947 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 948
bb873b53 949 return src->indata_len;
68b4476b
YS		 950}
951
3499e8a5
YS		 952/*
953 * build new request AND message, calculate layout, and adjust file
954 * extent as needed.
955 *
956 * if the file was recently truncated, we include information about its
957 * old and new size so that the object can be updated appropriately. (we
958 * avoid synchronously deleting truncated objects because it's slow.)
3499e8a5
YS		 959 */
960struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
961 struct ceph_file_layout *layout,
962 struct ceph_vino vino,
715e4cd4
YZ		 963 u64 off, u64 *plen,
964 unsigned int which, int num_ops,
3499e8a5
YS		 965 int opcode, int flags,
966 struct ceph_snap_context *snapc,
3499e8a5
YS		 967 u32 truncate_seq,
968 u64 truncate_size,
153e5167 969 bool use_mempool)
3499e8a5 970{
68b4476b 971 struct ceph_osd_request *req;
75d1c941
AE		 972 u64 objnum = 0;
973 u64 objoff = 0;
974 u64 objlen = 0;
6816282d 975 int r;
68b4476b 976
ad7a60de 977 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 978 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
979 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 980
acead002 981 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 982 GFP_NOFS);
13d1ad16
ID		 983 if (!req) {
984 r = -ENOMEM;
985 goto fail;
986 }
79528734 987
3499e8a5 988 /* calculate max write size */
a19dadfb 989 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 990 if (r)
991 goto fail;
a19dadfb 992
864e9197 993 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 994 osd_req_op_init(req, which, opcode, 0);
864e9197 995 } else {
7627151e 996 u32 object_size = layout->object_size;
864e9197
YZ		 997 u32 object_base = off - objoff;
998 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
999 if (truncate_size <= object_base) {
1000 truncate_size = 0;
1001 } else {
1002 truncate_size -= object_base;
1003 if (truncate_size > object_size)
1004 truncate_size = object_size;
1005 }
ccca4e37 1006 }
715e4cd4 1007 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 1008 truncate_size, truncate_seq);
1009 }
d18d1e28 1010
a1f4020a 1011 req->r_abort_on_full = true;
bb873b53 1012 req->r_flags = flags;
7627151e 1013 req->r_base_oloc.pool = layout->pool_id;
30c156d9 1014 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
d30291b9 1015 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
dbe0fc41 1016
bb873b53
ID		 1017 req->r_snapid = vino.snap;
1018 if (flags & CEPH_OSD_FLAG_WRITE)
1019 req->r_data_offset = off;
1020
13d1ad16
ID		 1021 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
1022 if (r)
1023 goto fail;
1024
f24e9980 1025 return req;
13d1ad16
ID		 1026
1027fail:
1028 ceph_osdc_put_request(req);
1029 return ERR_PTR(r);
f24e9980 1030}
3d14c5d2 1031EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 1032
1033/*
1034 * We keep osd requests in an rbtree, sorted by ->r_tid.
1035 */
fcd00b68 1036DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
4609245e 1037DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
f24e9980 1038
0247a0cf
ID		 1039static bool osd_homeless(struct ceph_osd *osd)
1040{
1041 return osd->o_osd == CEPH_HOMELESS_OSD;
1042}
1043
5aea3dcd 1044static bool osd_registered(struct ceph_osd *osd)
f24e9980 1045{
5aea3dcd 1046 verify_osdc_locked(osd->o_osdc);
f24e9980 1047
5aea3dcd 1048 return !RB_EMPTY_NODE(&osd->o_node);
f24e9980
SW		 1049}
1050
0247a0cf
ID		 1051/*
1052 * Assumes @osd is zero-initialized.
1053 */
1054static void osd_init(struct ceph_osd *osd)
1055{
02113a0f 1056 refcount_set(&osd->o_ref, 1);
0247a0cf 1057 RB_CLEAR_NODE(&osd->o_node);
5aea3dcd 1058 osd->o_requests = RB_ROOT;
922dab61 1059 osd->o_linger_requests = RB_ROOT;
a02a946d
ID		 1060 osd->o_backoff_mappings = RB_ROOT;
1061 osd->o_backoffs_by_id = RB_ROOT;
0247a0cf
ID		 1062 INIT_LIST_HEAD(&osd->o_osd_lru);
1063 INIT_LIST_HEAD(&osd->o_keepalive_item);
1064 osd->o_incarnation = 1;
5aea3dcd 1065 mutex_init(&osd->lock);
0247a0cf
ID		 1066}
1067
1068static void osd_cleanup(struct ceph_osd *osd)
1069{
1070 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
5aea3dcd 1071 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 1072 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
a02a946d
ID		 1073 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1074 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
0247a0cf
ID		 1075 WARN_ON(!list_empty(&osd->o_osd_lru));
1076 WARN_ON(!list_empty(&osd->o_keepalive_item));
1077
1078 if (osd->o_auth.authorizer) {
1079 WARN_ON(osd_homeless(osd));
1080 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1081 }
1082}
1083
f24e9980
SW		 1084/*
1085 * Track open sessions with osds.
1086 */
e10006f8 1087static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1088{
1089 struct ceph_osd *osd;
1090
0247a0cf
ID		 1091 WARN_ON(onum == CEPH_HOMELESS_OSD);
1092
7a28f59b 1093 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
0247a0cf 1094 osd_init(osd);
f24e9980 1095 osd->o_osdc = osdc;
e10006f8 1096 osd->o_osd = onum;
f24e9980 1097
b7a9e5dd 1098 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1099
f24e9980
SW		 1100 return osd;
1101}
1102
1103static struct ceph_osd *get_osd(struct ceph_osd *osd)
1104{
02113a0f
ER		 1105 if (refcount_inc_not_zero(&osd->o_ref)) {
1106 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1107 refcount_read(&osd->o_ref));
f24e9980
SW		 1108 return osd;
1109 } else {
1110 dout("get_osd %p FAIL\n", osd);
1111 return NULL;
1112 }
1113}
1114
1115static void put_osd(struct ceph_osd *osd)
1116{
02113a0f
ER		 1117 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1118 refcount_read(&osd->o_ref) - 1);
1119 if (refcount_dec_and_test(&osd->o_ref)) {
0247a0cf 1120 osd_cleanup(osd);
f24e9980 1121 kfree(osd);
79494d1b 1122 }
f24e9980
SW		 1123}
1124
fcd00b68
ID		 1125DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1126
9dd2845c 1127static void __move_osd_to_lru(struct ceph_osd *osd)
f5a2041b 1128{
9dd2845c
ID		 1129 struct ceph_osd_client *osdc = osd->o_osdc;
1130
1131 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
f5a2041b 1132 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1133
9dd2845c 1134 spin_lock(&osdc->osd_lru_lock);
f5a2041b 1135 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
9dd2845c
ID		 1136 spin_unlock(&osdc->osd_lru_lock);
1137
a319bf56 1138 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1139}
1140
9dd2845c 1141static void maybe_move_osd_to_lru(struct ceph_osd *osd)
bbf37ec3 1142{
5aea3dcd 1143 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1144 RB_EMPTY_ROOT(&osd->o_linger_requests))
9dd2845c 1145 __move_osd_to_lru(osd);
bbf37ec3
ID		 1146}
1147
f5a2041b
YS		 1148static void __remove_osd_from_lru(struct ceph_osd *osd)
1149{
9dd2845c
ID		 1150 struct ceph_osd_client *osdc = osd->o_osdc;
1151
1152 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1153
1154 spin_lock(&osdc->osd_lru_lock);
f5a2041b
YS		 1155 if (!list_empty(&osd->o_osd_lru))
1156 list_del_init(&osd->o_osd_lru);
9dd2845c 1157 spin_unlock(&osdc->osd_lru_lock);
f5a2041b
YS		 1158}
1159
5aea3dcd
ID		 1160/*
1161 * Close the connection and assign any leftover requests to the
1162 * homeless session.
1163 */
1164static void close_osd(struct ceph_osd *osd)
1165{
1166 struct ceph_osd_client *osdc = osd->o_osdc;
1167 struct rb_node *n;
1168
1169 verify_osdc_wrlocked(osdc);
1170 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1171
1172 ceph_con_close(&osd->o_con);
1173
1174 for (n = rb_first(&osd->o_requests); n; ) {
1175 struct ceph_osd_request *req =
1176 rb_entry(n, struct ceph_osd_request, r_node);
1177
1178 n = rb_next(n); /* unlink_request() */
1179
1180 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1181 unlink_request(osd, req);
1182 link_request(&osdc->homeless_osd, req);
1183 }
922dab61
ID		 1184 for (n = rb_first(&osd->o_linger_requests); n; ) {
1185 struct ceph_osd_linger_request *lreq =
1186 rb_entry(n, struct ceph_osd_linger_request, node);
1187
1188 n = rb_next(n); /* unlink_linger() */
1189
1190 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1191 lreq->linger_id);
1192 unlink_linger(osd, lreq);
1193 link_linger(&osdc->homeless_osd, lreq);
1194 }
a02a946d 1195 clear_backoffs(osd);
5aea3dcd
ID		 1196
1197 __remove_osd_from_lru(osd);
1198 erase_osd(&osdc->osds, osd);
1199 put_osd(osd);
1200}
1201
f24e9980
SW		 1202/*
1203 * reset osd connect
1204 */
5aea3dcd 1205static int reopen_osd(struct ceph_osd *osd)
f24e9980 1206{
c3acb181 1207 struct ceph_entity_addr *peer_addr;
f24e9980 1208
5aea3dcd
ID		 1209 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1210
1211 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1212 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
5aea3dcd 1213 close_osd(osd);
c3acb181
AE		 1214 return -ENODEV;
1215 }
1216
5aea3dcd 1217 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
c3acb181
AE		 1218 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1219 !ceph_con_opened(&osd->o_con)) {
5aea3dcd 1220 struct rb_node *n;
c3acb181 1221
0b4af2e8
ID		 1222 dout("osd addr hasn't changed and connection never opened, "
1223 "letting msgr retry\n");
87b315a5 1224 /* touch each r_stamp for handle_timeout()'s benfit */
5aea3dcd
ID		 1225 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1226 struct ceph_osd_request *req =
1227 rb_entry(n, struct ceph_osd_request, r_node);
87b315a5 1228 req->r_stamp = jiffies;
5aea3dcd 1229 }
c3acb181
AE		 1230
1231 return -EAGAIN;
f24e9980 1232 }
c3acb181
AE		 1233
1234 ceph_con_close(&osd->o_con);
1235 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1236 osd->o_incarnation++;
1237
1238 return 0;
f24e9980
SW		 1239}
1240
5aea3dcd
ID		 1241static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1242 bool wrlocked)
f24e9980 1243{
5aea3dcd 1244 struct ceph_osd *osd;
35f9f8a0 1245
5aea3dcd
ID		 1246 if (wrlocked)
1247 verify_osdc_wrlocked(osdc);
1248 else
1249 verify_osdc_locked(osdc);
f24e9980 1250
5aea3dcd
ID		 1251 if (o != CEPH_HOMELESS_OSD)
1252 osd = lookup_osd(&osdc->osds, o);
1253 else
1254 osd = &osdc->homeless_osd;
1255 if (!osd) {
1256 if (!wrlocked)
1257 return ERR_PTR(-EAGAIN);
0ba6478d 1258
5aea3dcd
ID		 1259 osd = create_osd(osdc, o);
1260 insert_osd(&osdc->osds, osd);
1261 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1262 &osdc->osdmap->osd_addr[osd->o_osd]);
0ba6478d 1263 }
f24e9980 1264
5aea3dcd
ID		 1265 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1266 return osd;
f24e9980
SW		 1267}
1268
1269/*
5aea3dcd
ID		 1270 * Create request <-> OSD session relation.
1271 *
1272 * @req has to be assigned a tid, @osd may be homeless.
f24e9980 1273 */
5aea3dcd 1274static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
f24e9980 1275{
5aea3dcd
ID		 1276 verify_osd_locked(osd);
1277 WARN_ON(!req->r_tid || req->r_osd);
1278 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1279 req, req->r_tid);
1280
1281 if (!osd_homeless(osd))
1282 __remove_osd_from_lru(osd);
1283 else
1284 atomic_inc(&osd->o_osdc->num_homeless);
1285
1286 get_osd(osd);
1287 insert_request(&osd->o_requests, req);
1288 req->r_osd = osd;
f24e9980
SW		 1289}
1290
5aea3dcd
ID		 1291static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1292{
1293 verify_osd_locked(osd);
1294 WARN_ON(req->r_osd != osd);
1295 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1296 req, req->r_tid);
1297
1298 req->r_osd = NULL;
1299 erase_request(&osd->o_requests, req);
1300 put_osd(osd);
1301
1302 if (!osd_homeless(osd))
1303 maybe_move_osd_to_lru(osd);
1304 else
1305 atomic_dec(&osd->o_osdc->num_homeless);
1306}
1307
63244fa1
ID		 1308static bool __pool_full(struct ceph_pg_pool_info *pi)
1309{
1310 return pi->flags & CEPH_POOL_FLAG_FULL;
1311}
1312
42c1b124
ID		 1313static bool have_pool_full(struct ceph_osd_client *osdc)
1314{
1315 struct rb_node *n;
1316
1317 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1318 struct ceph_pg_pool_info *pi =
1319 rb_entry(n, struct ceph_pg_pool_info, node);
1320
1321 if (__pool_full(pi))
1322 return true;
1323 }
1324
1325 return false;
1326}
1327
5aea3dcd
ID		 1328static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1329{
1330 struct ceph_pg_pool_info *pi;
1331
1332 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1333 if (!pi)
1334 return false;
1335
1336 return __pool_full(pi);
1337}
1338
d29adb34
JD		 1339/*
1340 * Returns whether a request should be blocked from being sent
1341 * based on the current osdmap and osd_client settings.
d29adb34 1342 */
63244fa1
ID		 1343static bool target_should_be_paused(struct ceph_osd_client *osdc,
1344 const struct ceph_osd_request_target *t,
1345 struct ceph_pg_pool_info *pi)
1346{
b7ec35b3
ID		 1347 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1348 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1349 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
63244fa1
ID		 1350 __pool_full(pi);
1351
6d637a54 1352 WARN_ON(pi->id != t->target_oloc.pool);
58eb7932
JL		 1353 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1354 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1355 (osdc->osdmap->epoch < osdc->epoch_barrier);
63244fa1
ID		 1356}
1357
63244fa1
ID		 1358enum calc_target_result {
1359 CALC_TARGET_NO_ACTION = 0,
1360 CALC_TARGET_NEED_RESEND,
1361 CALC_TARGET_POOL_DNE,
1362};
1363
1364static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1365 struct ceph_osd_request_target *t,
7de030d6 1366 struct ceph_connection *con,
63244fa1
ID		 1367 bool any_change)
1368{
1369 struct ceph_pg_pool_info *pi;
1370 struct ceph_pg pgid, last_pgid;
1371 struct ceph_osds up, acting;
1372 bool force_resend = false;
84ed45df
ID		 1373 bool unpaused = false;
1374 bool legacy_change;
7de030d6 1375 bool split = false;
b7ec35b3 1376 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
ae78dd81
ID		 1377 bool recovery_deletes = ceph_osdmap_flag(osdc,
1378 CEPH_OSDMAP_RECOVERY_DELETES);
63244fa1
ID		 1379 enum calc_target_result ct_res;
1380 int ret;
1381
04c7d789 1382 t->epoch = osdc->osdmap->epoch;
63244fa1
ID		 1383 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1384 if (!pi) {
1385 t->osd = CEPH_HOMELESS_OSD;
1386 ct_res = CALC_TARGET_POOL_DNE;
1387 goto out;
1388 }
1389
1390 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
dc93e0e2
ID		 1391 if (t->last_force_resend < pi->last_force_request_resend) {
1392 t->last_force_resend = pi->last_force_request_resend;
63244fa1 1393 force_resend = true;
dc93e0e2 1394 } else if (t->last_force_resend == 0) {
63244fa1
ID		 1395 force_resend = true;
1396 }
1397 }
63244fa1 1398
db098ec4
ID		 1399 /* apply tiering */
1400 ceph_oid_copy(&t->target_oid, &t->base_oid);
1401 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1402 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
63244fa1
ID		 1403 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1404 t->target_oloc.pool = pi->read_tier;
1405 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1406 t->target_oloc.pool = pi->write_tier;
6d637a54
ID		 1407
1408 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1409 if (!pi) {
1410 t->osd = CEPH_HOMELESS_OSD;
1411 ct_res = CALC_TARGET_POOL_DNE;
1412 goto out;
1413 }
63244fa1
ID		 1414 }
1415
df28152d
ID		 1416 ret = __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc,
1417 &pgid);
63244fa1
ID		 1418 if (ret) {
1419 WARN_ON(ret != -ENOENT);
1420 t->osd = CEPH_HOMELESS_OSD;
1421 ct_res = CALC_TARGET_POOL_DNE;
1422 goto out;
1423 }
1424 last_pgid.pool = pgid.pool;
1425 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1426
df28152d 1427 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
63244fa1
ID		 1428 if (any_change &&
1429 ceph_is_new_interval(&t->acting,
1430 &acting,
1431 &t->up,
1432 &up,
1433 t->size,
1434 pi->size,
1435 t->min_size,
1436 pi->min_size,
1437 t->pg_num,
1438 pi->pg_num,
1439 t->sort_bitwise,
1440 sort_bitwise,
ae78dd81
ID		 1441 t->recovery_deletes,
1442 recovery_deletes,
63244fa1
ID		 1443 &last_pgid))
1444 force_resend = true;
1445
1446 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1447 t->paused = false;
84ed45df 1448 unpaused = true;
63244fa1 1449 }
84ed45df
ID		 1450 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1451 ceph_osds_changed(&t->acting, &acting, any_change);
7de030d6
ID		 1452 if (t->pg_num)
1453 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
63244fa1 1454
7de030d6 1455 if (legacy_change || force_resend || split) {
63244fa1 1456 t->pgid = pgid; /* struct */
df28152d 1457 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
63244fa1
ID		 1458 ceph_osds_copy(&t->acting, &acting);
1459 ceph_osds_copy(&t->up, &up);
1460 t->size = pi->size;
1461 t->min_size = pi->min_size;
1462 t->pg_num = pi->pg_num;
1463 t->pg_num_mask = pi->pg_num_mask;
1464 t->sort_bitwise = sort_bitwise;
ae78dd81 1465 t->recovery_deletes = recovery_deletes;
63244fa1
ID		 1466
1467 t->osd = acting.primary;
63244fa1
ID		 1468 }
1469
7de030d6
ID		 1470 if (unpaused || legacy_change || force_resend ||
1471 (split && con && CEPH_HAVE_FEATURE(con->peer_features,
1472 RESEND_ON_SPLIT)))
84ed45df
ID		 1473 ct_res = CALC_TARGET_NEED_RESEND;
1474 else
1475 ct_res = CALC_TARGET_NO_ACTION;
1476
63244fa1
ID		 1477out:
1478 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1479 return ct_res;
1480}
1481
a02a946d
ID		 1482static struct ceph_spg_mapping *alloc_spg_mapping(void)
1483{
1484 struct ceph_spg_mapping *spg;
1485
1486 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1487 if (!spg)
1488 return NULL;
1489
1490 RB_CLEAR_NODE(&spg->node);
1491 spg->backoffs = RB_ROOT;
1492 return spg;
1493}
1494
1495static void free_spg_mapping(struct ceph_spg_mapping *spg)
1496{
1497 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1498 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1499
1500 kfree(spg);
1501}
1502
1503/*
1504 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1505 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1506 * defined only within a specific spgid; it does not pass anything to
1507 * children on split, or to another primary.
1508 */
1509DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1510 RB_BYPTR, const struct ceph_spg *, node)
1511
1512static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1513{
1514 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1515}
1516
1517static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1518 void **pkey, size_t *pkey_len)
1519{
1520 if (hoid->key_len) {
1521 *pkey = hoid->key;
1522 *pkey_len = hoid->key_len;
1523 } else {
1524 *pkey = hoid->oid;
1525 *pkey_len = hoid->oid_len;
1526 }
1527}
1528
1529static int compare_names(const void *name1, size_t name1_len,
1530 const void *name2, size_t name2_len)
1531{
1532 int ret;
1533
1534 ret = memcmp(name1, name2, min(name1_len, name2_len));
1535 if (!ret) {
1536 if (name1_len < name2_len)
1537 ret = -1;
1538 else if (name1_len > name2_len)
1539 ret = 1;
1540 }
1541 return ret;
1542}
1543
1544static int hoid_compare(const struct ceph_hobject_id *lhs,
1545 const struct ceph_hobject_id *rhs)
1546{
1547 void *effective_key1, *effective_key2;
1548 size_t effective_key1_len, effective_key2_len;
1549 int ret;
1550
1551 if (lhs->is_max < rhs->is_max)
1552 return -1;
1553 if (lhs->is_max > rhs->is_max)
1554 return 1;
1555
1556 if (lhs->pool < rhs->pool)
1557 return -1;
1558 if (lhs->pool > rhs->pool)
1559 return 1;
1560
1561 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1562 return -1;
1563 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1564 return 1;
1565
1566 ret = compare_names(lhs->nspace, lhs->nspace_len,
1567 rhs->nspace, rhs->nspace_len);
1568 if (ret)
1569 return ret;
1570
1571 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1572 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1573 ret = compare_names(effective_key1, effective_key1_len,
1574 effective_key2, effective_key2_len);
1575 if (ret)
1576 return ret;
1577
1578 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1579 if (ret)
1580 return ret;
1581
1582 if (lhs->snapid < rhs->snapid)
1583 return -1;
1584 if (lhs->snapid > rhs->snapid)
1585 return 1;
1586
1587 return 0;
1588}
1589
1590/*
1591 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1592 * compat stuff here.
1593 *
1594 * Assumes @hoid is zero-initialized.
1595 */
1596static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1597{
1598 u8 struct_v;
1599 u32 struct_len;
1600 int ret;
1601
1602 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1603 &struct_len);
1604 if (ret)
1605 return ret;
1606
1607 if (struct_v < 4) {
1608 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1609 goto e_inval;
1610 }
1611
1612 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1613 GFP_NOIO);
1614 if (IS_ERR(hoid->key)) {
1615 ret = PTR_ERR(hoid->key);
1616 hoid->key = NULL;
1617 return ret;
1618 }
1619
1620 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1621 GFP_NOIO);
1622 if (IS_ERR(hoid->oid)) {
1623 ret = PTR_ERR(hoid->oid);
1624 hoid->oid = NULL;
1625 return ret;
1626 }
1627
1628 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1629 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1630 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1631
1632 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1633 GFP_NOIO);
1634 if (IS_ERR(hoid->nspace)) {
1635 ret = PTR_ERR(hoid->nspace);
1636 hoid->nspace = NULL;
1637 return ret;
1638 }
1639
1640 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1641
1642 ceph_hoid_build_hash_cache(hoid);
1643 return 0;
1644
1645e_inval:
1646 return -EINVAL;
1647}
1648
1649static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1650{
1651 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1652 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1653}
1654
1655static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1656{
1657 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1658 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1659 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1660 ceph_encode_64(p, hoid->snapid);
1661 ceph_encode_32(p, hoid->hash);
1662 ceph_encode_8(p, hoid->is_max);
1663 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1664 ceph_encode_64(p, hoid->pool);
1665}
1666
1667static void free_hoid(struct ceph_hobject_id *hoid)
1668{
1669 if (hoid) {
1670 kfree(hoid->key);
1671 kfree(hoid->oid);
1672 kfree(hoid->nspace);
1673 kfree(hoid);
1674 }
1675}
1676
1677static struct ceph_osd_backoff *alloc_backoff(void)
1678{
1679 struct ceph_osd_backoff *backoff;
1680
1681 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1682 if (!backoff)
1683 return NULL;
1684
1685 RB_CLEAR_NODE(&backoff->spg_node);
1686 RB_CLEAR_NODE(&backoff->id_node);
1687 return backoff;
1688}
1689
1690static void free_backoff(struct ceph_osd_backoff *backoff)
1691{
1692 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1693 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1694
1695 free_hoid(backoff->begin);
1696 free_hoid(backoff->end);
1697 kfree(backoff);
1698}
1699
1700/*
1701 * Within a specific spgid, backoffs are managed by ->begin hoid.
1702 */
1703DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1704 RB_BYVAL, spg_node);
1705
1706static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1707 const struct ceph_hobject_id *hoid)
1708{
1709 struct rb_node *n = root->rb_node;
1710
1711 while (n) {
1712 struct ceph_osd_backoff *cur =
1713 rb_entry(n, struct ceph_osd_backoff, spg_node);
1714 int cmp;
1715
1716 cmp = hoid_compare(hoid, cur->begin);
1717 if (cmp < 0) {
1718 n = n->rb_left;
1719 } else if (cmp > 0) {
1720 if (hoid_compare(hoid, cur->end) < 0)
1721 return cur;
1722
1723 n = n->rb_right;
1724 } else {
1725 return cur;
1726 }
1727 }
1728
1729 return NULL;
1730}
1731
1732/*
1733 * Each backoff has a unique id within its OSD session.
1734 */
1735DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1736
1737static void clear_backoffs(struct ceph_osd *osd)
1738{
1739 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1740 struct ceph_spg_mapping *spg =
1741 rb_entry(rb_first(&osd->o_backoff_mappings),
1742 struct ceph_spg_mapping, node);
1743
1744 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1745 struct ceph_osd_backoff *backoff =
1746 rb_entry(rb_first(&spg->backoffs),
1747 struct ceph_osd_backoff, spg_node);
1748
1749 erase_backoff(&spg->backoffs, backoff);
1750 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1751 free_backoff(backoff);
1752 }
1753 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1754 free_spg_mapping(spg);
1755 }
1756}
1757
1758/*
1759 * Set up a temporary, non-owning view into @t.
1760 */
1761static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1762 const struct ceph_osd_request_target *t)
1763{
1764 hoid->key = NULL;
1765 hoid->key_len = 0;
1766 hoid->oid = t->target_oid.name;
1767 hoid->oid_len = t->target_oid.name_len;
1768 hoid->snapid = CEPH_NOSNAP;
1769 hoid->hash = t->pgid.seed;
1770 hoid->is_max = false;
1771 if (t->target_oloc.pool_ns) {
1772 hoid->nspace = t->target_oloc.pool_ns->str;
1773 hoid->nspace_len = t->target_oloc.pool_ns->len;
1774 } else {
1775 hoid->nspace = NULL;
1776 hoid->nspace_len = 0;
1777 }
1778 hoid->pool = t->target_oloc.pool;
1779 ceph_hoid_build_hash_cache(hoid);
1780}
1781
1782static bool should_plug_request(struct ceph_osd_request *req)
1783{
1784 struct ceph_osd *osd = req->r_osd;
1785 struct ceph_spg_mapping *spg;
1786 struct ceph_osd_backoff *backoff;
1787 struct ceph_hobject_id hoid;
1788
1789 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1790 if (!spg)
1791 return false;
1792
1793 hoid_fill_from_target(&hoid, &req->r_t);
1794 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1795 if (!backoff)
1796 return false;
1797
1798 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1799 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1800 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1801 return true;
1802}
1803
bb873b53
ID		 1804static void setup_request_data(struct ceph_osd_request *req,
1805 struct ceph_msg *msg)
f24e9980 1806{
bb873b53
ID		 1807 u32 data_len = 0;
1808 int i;
1809
1810 if (!list_empty(&msg->data))
1811 return;
f24e9980 1812
bb873b53
ID		 1813 WARN_ON(msg->data_length);
1814 for (i = 0; i < req->r_num_ops; i++) {
1815 struct ceph_osd_req_op *op = &req->r_ops[i];
1816
1817 switch (op->op) {
1818 /* request */
1819 case CEPH_OSD_OP_WRITE:
1820 case CEPH_OSD_OP_WRITEFULL:
1821 WARN_ON(op->indata_len != op->extent.length);
1822 ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1823 break;
1824 case CEPH_OSD_OP_SETXATTR:
1825 case CEPH_OSD_OP_CMPXATTR:
1826 WARN_ON(op->indata_len != op->xattr.name_len +
1827 op->xattr.value_len);
1828 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1829 break;
922dab61
ID		 1830 case CEPH_OSD_OP_NOTIFY_ACK:
1831 ceph_osdc_msg_data_add(msg,
1832 &op->notify_ack.request_data);
1833 break;
bb873b53
ID		 1834
1835 /* reply */
1836 case CEPH_OSD_OP_STAT:
1837 ceph_osdc_msg_data_add(req->r_reply,
1838 &op->raw_data_in);
1839 break;
1840 case CEPH_OSD_OP_READ:
1841 ceph_osdc_msg_data_add(req->r_reply,
1842 &op->extent.osd_data);
1843 break;
a4ed38d7
DF		 1844 case CEPH_OSD_OP_LIST_WATCHERS:
1845 ceph_osdc_msg_data_add(req->r_reply,
1846 &op->list_watchers.response_data);
1847 break;
bb873b53
ID		 1848
1849 /* both */
1850 case CEPH_OSD_OP_CALL:
1851 WARN_ON(op->indata_len != op->cls.class_len +
1852 op->cls.method_len +
1853 op->cls.indata_len);
1854 ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1855 /* optional, can be NONE */
1856 ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1857 /* optional, can be NONE */
1858 ceph_osdc_msg_data_add(req->r_reply,
1859 &op->cls.response_data);
1860 break;
19079203
ID		 1861 case CEPH_OSD_OP_NOTIFY:
1862 ceph_osdc_msg_data_add(msg,
1863 &op->notify.request_data);
1864 ceph_osdc_msg_data_add(req->r_reply,
1865 &op->notify.response_data);
1866 break;
bb873b53
ID		 1867 }
1868
1869 data_len += op->indata_len;
1870 }
1b83bef2 1871
bb873b53
ID		 1872 WARN_ON(data_len != msg->data_length);
1873}
1874
2e59ffd1
ID		 1875static void encode_pgid(void **p, const struct ceph_pg *pgid)
1876{
1877 ceph_encode_8(p, 1);
1878 ceph_encode_64(p, pgid->pool);
1879 ceph_encode_32(p, pgid->seed);
1880 ceph_encode_32(p, -1); /* preferred */
1881}
1882
8cb441c0
ID		 1883static void encode_spgid(void **p, const struct ceph_spg *spgid)
1884{
1885 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
1886 encode_pgid(p, &spgid->pgid);
1887 ceph_encode_8(p, spgid->shard);
1888}
1889
2e59ffd1
ID		 1890static void encode_oloc(void **p, void *end,
1891 const struct ceph_object_locator *oloc)
1892{
1893 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
1894 ceph_encode_64(p, oloc->pool);
1895 ceph_encode_32(p, -1); /* preferred */
1896 ceph_encode_32(p, 0); /* key len */
1897 if (oloc->pool_ns)
1898 ceph_encode_string(p, end, oloc->pool_ns->str,
1899 oloc->pool_ns->len);
1900 else
1901 ceph_encode_32(p, 0);
1902}
1903
8cb441c0
ID		 1904static void encode_request_partial(struct ceph_osd_request *req,
1905 struct ceph_msg *msg)
bb873b53
ID		 1906{
1907 void *p = msg->front.iov_base;
1908 void *const end = p + msg->front_alloc_len;
1909 u32 data_len = 0;
1910 int i;
1911
1912 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1913 /* snapshots aren't writeable */
1914 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1915 } else {
1916 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1917 req->r_data_offset || req->r_snapc);
1918 }
1919
1920 setup_request_data(req, msg);
1921
8cb441c0
ID		 1922 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
1923 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
bb873b53
ID		 1924 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1925 ceph_encode_32(&p, req->r_flags);
8cb441c0
ID		 1926
1927 /* reqid */
1928 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
1929 memset(p, 0, sizeof(struct ceph_osd_reqid));
1930 p += sizeof(struct ceph_osd_reqid);
1931
1932 /* trace */
1933 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
1934 p += sizeof(struct ceph_blkin_trace_info);
1935
1936 ceph_encode_32(&p, 0); /* client_inc, always 0 */
bb873b53
ID		 1937 ceph_encode_timespec(p, &req->r_mtime);
1938 p += sizeof(struct ceph_timespec);
aa26d662 1939
2e59ffd1 1940 encode_oloc(&p, end, &req->r_t.target_oloc);
2e59ffd1
ID		 1941 ceph_encode_string(&p, end, req->r_t.target_oid.name,
1942 req->r_t.target_oid.name_len);
f24e9980 1943
bb873b53
ID		 1944 /* ops, can imply data */
1945 ceph_encode_16(&p, req->r_num_ops);
1946 for (i = 0; i < req->r_num_ops; i++) {
1947 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1948 p += sizeof(struct ceph_osd_op);
1949 }
26be8808 1950
bb873b53
ID		 1951 ceph_encode_64(&p, req->r_snapid); /* snapid */
1952 if (req->r_snapc) {
1953 ceph_encode_64(&p, req->r_snapc->seq);
1954 ceph_encode_32(&p, req->r_snapc->num_snaps);
1955 for (i = 0; i < req->r_snapc->num_snaps; i++)
1956 ceph_encode_64(&p, req->r_snapc->snaps[i]);
1957 } else {
1958 ceph_encode_64(&p, 0); /* snap_seq */
1959 ceph_encode_32(&p, 0); /* snaps len */
1960 }
1961
1962 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
986e8989 1963 BUG_ON(p > end - 8); /* space for features */
bb873b53 1964
8cb441c0
ID		 1965 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
1966 /* front_len is finalized in encode_request_finish() */
986e8989
ID		 1967 msg->front.iov_len = p - msg->front.iov_base;
1968 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
bb873b53
ID		 1969 msg->hdr.data_len = cpu_to_le32(data_len);
1970 /*
1971 * The header "data_off" is a hint to the receiver allowing it
1972 * to align received data into its buffers such that there's no
1973 * need to re-copy it before writing it to disk (direct I/O).
1974 */
1975 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
26be8808 1976
8cb441c0
ID		 1977 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
1978 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
1979}
1980
1981static void encode_request_finish(struct ceph_msg *msg)
1982{
1983 void *p = msg->front.iov_base;
986e8989 1984 void *const partial_end = p + msg->front.iov_len;
8cb441c0
ID		 1985 void *const end = p + msg->front_alloc_len;
1986
1987 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
1988 /* luminous OSD -- encode features and be done */
986e8989 1989 p = partial_end;
8cb441c0
ID		 1990 ceph_encode_64(&p, msg->con->peer_features);
1991 } else {
1992 struct {
1993 char spgid[CEPH_ENCODING_START_BLK_LEN +
1994 CEPH_PGID_ENCODING_LEN + 1];
1995 __le32 hash;
1996 __le32 epoch;
1997 __le32 flags;
1998 char reqid[CEPH_ENCODING_START_BLK_LEN +
1999 sizeof(struct ceph_osd_reqid)];
2000 char trace[sizeof(struct ceph_blkin_trace_info)];
2001 __le32 client_inc;
2002 struct ceph_timespec mtime;
2003 } __packed head;
2004 struct ceph_pg pgid;
2005 void *oloc, *oid, *tail;
2006 int oloc_len, oid_len, tail_len;
2007 int len;
2008
2009 /*
2010 * Pre-luminous OSD -- reencode v8 into v4 using @head
2011 * as a temporary buffer. Encode the raw PG; the rest
2012 * is just a matter of moving oloc, oid and tail blobs
2013 * around.
2014 */
2015 memcpy(&head, p, sizeof(head));
2016 p += sizeof(head);
2017
2018 oloc = p;
2019 p += CEPH_ENCODING_START_BLK_LEN;
2020 pgid.pool = ceph_decode_64(&p);
2021 p += 4 + 4; /* preferred, key len */
2022 len = ceph_decode_32(&p);
2023 p += len; /* nspace */
2024 oloc_len = p - oloc;
2025
2026 oid = p;
2027 len = ceph_decode_32(&p);
2028 p += len;
2029 oid_len = p - oid;
2030
2031 tail = p;
986e8989 2032 tail_len = partial_end - p;
8cb441c0
ID		 2033
2034 p = msg->front.iov_base;
2035 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2036 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2037 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2038 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2039
2040 /* reassert_version */
2041 memset(p, 0, sizeof(struct ceph_eversion));
2042 p += sizeof(struct ceph_eversion);
2043
2044 BUG_ON(p >= oloc);
2045 memmove(p, oloc, oloc_len);
2046 p += oloc_len;
2047
2048 pgid.seed = le32_to_cpu(head.hash);
2049 encode_pgid(&p, &pgid); /* raw pg */
2050
2051 BUG_ON(p >= oid);
2052 memmove(p, oid, oid_len);
2053 p += oid_len;
2054
2055 /* tail -- ops, snapid, snapc, retry_attempt */
2056 BUG_ON(p >= tail);
2057 memmove(p, tail, tail_len);
2058 p += tail_len;
2059
2060 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2061 }
2062
2063 BUG_ON(p > end);
2064 msg->front.iov_len = p - msg->front.iov_base;
2065 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2066
2067 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2068 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2069 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2070 le16_to_cpu(msg->hdr.version));
bb873b53
ID		 2071}
2072
2073/*
2074 * @req has to be assigned a tid and registered.
2075 */
2076static void send_request(struct ceph_osd_request *req)
2077{
2078 struct ceph_osd *osd = req->r_osd;
2079
5aea3dcd 2080 verify_osd_locked(osd);
bb873b53
ID		 2081 WARN_ON(osd->o_osd != req->r_t.osd);
2082
a02a946d
ID		 2083 /* backoff? */
2084 if (should_plug_request(req))
2085 return;
2086
5aea3dcd
ID		 2087 /*
2088 * We may have a previously queued request message hanging
2089 * around. Cancel it to avoid corrupting the msgr.
2090 */
2091 if (req->r_sent)
2092 ceph_msg_revoke(req->r_request);
2093
bb873b53
ID		 2094 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2095 if (req->r_attempts)
2096 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2097 else
2098 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2099
8cb441c0 2100 encode_request_partial(req, req->r_request);
bb873b53 2101
04c7d789 2102 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 2103 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
dc98ff72 2104 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
04c7d789
ID		 2105 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2106 req->r_attempts);
bb873b53
ID		 2107
2108 req->r_t.paused = false;
2109 req->r_stamp = jiffies;
2110 req->r_attempts++;
2111
2112 req->r_sent = osd->o_incarnation;
2113 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2114 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
f24e9980
SW		 2115}
2116
42c1b124
ID		 2117static void maybe_request_map(struct ceph_osd_client *osdc)
2118{
2119 bool continuous = false;
2120
5aea3dcd 2121 verify_osdc_locked(osdc);
42c1b124
ID		 2122 WARN_ON(!osdc->osdmap->epoch);
2123
b7ec35b3
ID		 2124 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2125 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2126 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
42c1b124
ID		 2127 dout("%s osdc %p continuous\n", __func__, osdc);
2128 continuous = true;
2129 } else {
2130 dout("%s osdc %p onetime\n", __func__, osdc);
2131 }
2132
2133 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2134 osdc->osdmap->epoch + 1, continuous))
2135 ceph_monc_renew_subs(&osdc->client->monc);
2136}
2137
a1f4020a 2138static void complete_request(struct ceph_osd_request *req, int err);
4609245e
ID		 2139static void send_map_check(struct ceph_osd_request *req);
2140
5aea3dcd 2141static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
0bbfdfe8 2142{
5aea3dcd
ID		 2143 struct ceph_osd_client *osdc = req->r_osdc;
2144 struct ceph_osd *osd;
4609245e 2145 enum calc_target_result ct_res;
5aea3dcd
ID		 2146 bool need_send = false;
2147 bool promoted = false;
a1f4020a 2148 bool need_abort = false;
0bbfdfe8 2149
b18b9550 2150 WARN_ON(req->r_tid);
5aea3dcd
ID		 2151 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2152
2153again:
7de030d6 2154 ct_res = calc_target(osdc, &req->r_t, NULL, false);
4609245e
ID		 2155 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2156 goto promote;
2157
5aea3dcd
ID		 2158 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2159 if (IS_ERR(osd)) {
2160 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2161 goto promote;
0bbfdfe8
ID		 2162 }
2163
58eb7932
JL		 2164 if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2165 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2166 osdc->epoch_barrier);
2167 req->r_t.paused = true;
2168 maybe_request_map(osdc);
2169 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2170 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
5aea3dcd
ID		 2171 dout("req %p pausewr\n", req);
2172 req->r_t.paused = true;
2173 maybe_request_map(osdc);
2174 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
b7ec35b3 2175 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
5aea3dcd
ID		 2176 dout("req %p pauserd\n", req);
2177 req->r_t.paused = true;
2178 maybe_request_map(osdc);
2179 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2180 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2181 CEPH_OSD_FLAG_FULL_FORCE)) &&
b7ec35b3 2182 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
5aea3dcd
ID		 2183 pool_full(osdc, req->r_t.base_oloc.pool))) {
2184 dout("req %p full/pool_full\n", req);
2185 pr_warn_ratelimited("FULL or reached pool quota\n");
2186 req->r_t.paused = true;
2187 maybe_request_map(osdc);
a1f4020a
JL		 2188 if (req->r_abort_on_full)
2189 need_abort = true;
5aea3dcd
ID		 2190 } else if (!osd_homeless(osd)) {
2191 need_send = true;
0bbfdfe8 2192 } else {
5aea3dcd 2193 maybe_request_map(osdc);
0bbfdfe8
ID		 2194 }
2195
5aea3dcd
ID		 2196 mutex_lock(&osd->lock);
2197 /*
2198 * Assign the tid atomically with send_request() to protect
2199 * multiple writes to the same object from racing with each
2200 * other, resulting in out of order ops on the OSDs.
2201 */
2202 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2203 link_request(osd, req);
2204 if (need_send)
2205 send_request(req);
a1f4020a
JL		 2206 else if (need_abort)
2207 complete_request(req, -ENOSPC);
5aea3dcd
ID		 2208 mutex_unlock(&osd->lock);
2209
4609245e
ID		 2210 if (ct_res == CALC_TARGET_POOL_DNE)
2211 send_map_check(req);
2212
5aea3dcd
ID		 2213 if (promoted)
2214 downgrade_write(&osdc->lock);
2215 return;
2216
2217promote:
2218 up_read(&osdc->lock);
2219 down_write(&osdc->lock);
2220 wrlocked = true;
2221 promoted = true;
2222 goto again;
2223}
2224
2225static void account_request(struct ceph_osd_request *req)
2226{
54ea0046 2227 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
b18b9550 2228 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
5aea3dcd 2229
b18b9550 2230 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
5aea3dcd 2231 atomic_inc(&req->r_osdc->num_requests);
7cc5e38f
ID		 2232
2233 req->r_start_stamp = jiffies;
5aea3dcd
ID		 2234}
2235
2236static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2237{
2238 ceph_osdc_get_request(req);
2239 account_request(req);
2240 __submit_request(req, wrlocked);
2241}
2242
45ee2c1d 2243static void finish_request(struct ceph_osd_request *req)
5aea3dcd
ID		 2244{
2245 struct ceph_osd_client *osdc = req->r_osdc;
5aea3dcd 2246
04c7d789 2247 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
5aea3dcd
ID		 2248 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2249
04c7d789
ID		 2250 if (req->r_osd)
2251 unlink_request(req->r_osd, req);
5aea3dcd
ID		 2252 atomic_dec(&osdc->num_requests);
2253
2254 /*
2255 * If an OSD has failed or returned and a request has been sent
2256 * twice, it's possible to get a reply and end up here while the
2257 * request message is queued for delivery. We will ignore the
2258 * reply, so not a big deal, but better to try and catch it.
2259 */
2260 ceph_msg_revoke(req->r_request);
2261 ceph_msg_revoke_incoming(req->r_reply);
2262}
2263
fe5da05e
ID		 2264static void __complete_request(struct ceph_osd_request *req)
2265{
b18b9550
ID		 2266 if (req->r_callback) {
2267 dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
2268 req->r_tid, req->r_callback, req->r_result);
fe5da05e 2269 req->r_callback(req);
b18b9550 2270 }
fe5da05e
ID		 2271}
2272
4609245e 2273/*
b18b9550 2274 * This is open-coded in handle_reply().
4609245e
ID		 2275 */
2276static void complete_request(struct ceph_osd_request *req, int err)
2277{
2278 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2279
2280 req->r_result = err;
45ee2c1d 2281 finish_request(req);
4609245e 2282 __complete_request(req);
b18b9550 2283 complete_all(&req->r_completion);
4609245e
ID		 2284 ceph_osdc_put_request(req);
2285}
2286
2287static void cancel_map_check(struct ceph_osd_request *req)
2288{
2289 struct ceph_osd_client *osdc = req->r_osdc;
2290 struct ceph_osd_request *lookup_req;
2291
2292 verify_osdc_wrlocked(osdc);
2293
2294 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2295 if (!lookup_req)
2296 return;
2297
2298 WARN_ON(lookup_req != req);
2299 erase_request_mc(&osdc->map_checks, req);
2300 ceph_osdc_put_request(req);
2301}
2302
5aea3dcd
ID		 2303static void cancel_request(struct ceph_osd_request *req)
2304{
2305 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2306
4609245e 2307 cancel_map_check(req);
45ee2c1d 2308 finish_request(req);
b18b9550 2309 complete_all(&req->r_completion);
c297eb42 2310 ceph_osdc_put_request(req);
5aea3dcd
ID		 2311}
2312
7cc5e38f
ID		 2313static void abort_request(struct ceph_osd_request *req, int err)
2314{
2315 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2316
2317 cancel_map_check(req);
2318 complete_request(req, err);
2319}
2320
58eb7932
JL		 2321static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2322{
2323 if (likely(eb > osdc->epoch_barrier)) {
2324 dout("updating epoch_barrier from %u to %u\n",
2325 osdc->epoch_barrier, eb);
2326 osdc->epoch_barrier = eb;
2327 /* Request map if we're not to the barrier yet */
2328 if (eb > osdc->osdmap->epoch)
2329 maybe_request_map(osdc);
2330 }
2331}
2332
2333void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2334{
2335 down_read(&osdc->lock);
2336 if (unlikely(eb > osdc->epoch_barrier)) {
2337 up_read(&osdc->lock);
2338 down_write(&osdc->lock);
2339 update_epoch_barrier(osdc, eb);
2340 up_write(&osdc->lock);
2341 } else {
2342 up_read(&osdc->lock);
2343 }
2344}
2345EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2346
fc36d0a4
JL		 2347/*
2348 * Drop all pending requests that are stalled waiting on a full condition to
58eb7932
JL		 2349 * clear, and complete them with ENOSPC as the return code. Set the
2350 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2351 * cancelled.
fc36d0a4
JL		 2352 */
2353static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2354{
2355 struct rb_node *n;
58eb7932 2356 bool victims = false;
fc36d0a4
JL		 2357
2358 dout("enter abort_on_full\n");
2359
2360 if (!ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !have_pool_full(osdc))
2361 goto out;
2362
58eb7932
JL		 2363 /* Scan list and see if there is anything to abort */
2364 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2365 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2366 struct rb_node *m;
2367
2368 m = rb_first(&osd->o_requests);
2369 while (m) {
2370 struct ceph_osd_request *req = rb_entry(m,
2371 struct ceph_osd_request, r_node);
2372 m = rb_next(m);
2373
2374 if (req->r_abort_on_full) {
2375 victims = true;
2376 break;
2377 }
2378 }
2379 if (victims)
2380 break;
2381 }
2382
2383 if (!victims)
2384 goto out;
2385
2386 /*
2387 * Update the barrier to current epoch if it's behind that point,
2388 * since we know we have some calls to be aborted in the tree.
2389 */
2390 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2391
fc36d0a4
JL		 2392 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2393 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2394 struct rb_node *m;
2395
2396 m = rb_first(&osd->o_requests);
2397 while (m) {
2398 struct ceph_osd_request *req = rb_entry(m,
2399 struct ceph_osd_request, r_node);
2400 m = rb_next(m);
2401
2402 if (req->r_abort_on_full &&
2403 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2404 pool_full(osdc, req->r_t.target_oloc.pool)))
2405 abort_request(req, -ENOSPC);
2406 }
2407 }
2408out:
58eb7932 2409 dout("return abort_on_full barrier=%u\n", osdc->epoch_barrier);
fc36d0a4
JL		 2410}
2411
4609245e
ID		 2412static void check_pool_dne(struct ceph_osd_request *req)
2413{
2414 struct ceph_osd_client *osdc = req->r_osdc;
2415 struct ceph_osdmap *map = osdc->osdmap;
2416
2417 verify_osdc_wrlocked(osdc);
2418 WARN_ON(!map->epoch);
2419
2420 if (req->r_attempts) {
2421 /*
2422 * We sent a request earlier, which means that
2423 * previously the pool existed, and now it does not
2424 * (i.e., it was deleted).
2425 */
2426 req->r_map_dne_bound = map->epoch;
2427 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2428 req->r_tid);
2429 } else {
2430 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2431 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2432 }
2433
2434 if (req->r_map_dne_bound) {
2435 if (map->epoch >= req->r_map_dne_bound) {
2436 /* we had a new enough map */
2437 pr_info_ratelimited("tid %llu pool does not exist\n",
2438 req->r_tid);
2439 complete_request(req, -ENOENT);
2440 }
2441 } else {
2442 send_map_check(req);
2443 }
2444}
2445
2446static void map_check_cb(struct ceph_mon_generic_request *greq)
2447{
2448 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2449 struct ceph_osd_request *req;
2450 u64 tid = greq->private_data;
2451
2452 WARN_ON(greq->result || !greq->u.newest);
2453
2454 down_write(&osdc->lock);
2455 req = lookup_request_mc(&osdc->map_checks, tid);
2456 if (!req) {
2457 dout("%s tid %llu dne\n", __func__, tid);
2458 goto out_unlock;
2459 }
2460
2461 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2462 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2463 if (!req->r_map_dne_bound)
2464 req->r_map_dne_bound = greq->u.newest;
2465 erase_request_mc(&osdc->map_checks, req);
2466 check_pool_dne(req);
2467
2468 ceph_osdc_put_request(req);
2469out_unlock:
2470 up_write(&osdc->lock);
2471}
2472
2473static void send_map_check(struct ceph_osd_request *req)
2474{
2475 struct ceph_osd_client *osdc = req->r_osdc;
2476 struct ceph_osd_request *lookup_req;
2477 int ret;
2478
2479 verify_osdc_wrlocked(osdc);
2480
2481 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2482 if (lookup_req) {
2483 WARN_ON(lookup_req != req);
2484 return;
2485 }
2486
2487 ceph_osdc_get_request(req);
2488 insert_request_mc(&osdc->map_checks, req);
2489 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2490 map_check_cb, req->r_tid);
2491 WARN_ON(ret);
2492}
2493
922dab61
ID		 2494/*
2495 * lingering requests, watch/notify v2 infrastructure
2496 */
2497static void linger_release(struct kref *kref)
2498{
2499 struct ceph_osd_linger_request *lreq =
2500 container_of(kref, struct ceph_osd_linger_request, kref);
2501
2502 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2503 lreq->reg_req, lreq->ping_req);
2504 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2505 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
4609245e 2506 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
922dab61 2507 WARN_ON(!list_empty(&lreq->scan_item));
b07d3c4b 2508 WARN_ON(!list_empty(&lreq->pending_lworks));
922dab61
ID		 2509 WARN_ON(lreq->osd);
2510
2511 if (lreq->reg_req)
2512 ceph_osdc_put_request(lreq->reg_req);
2513 if (lreq->ping_req)
2514 ceph_osdc_put_request(lreq->ping_req);
2515 target_destroy(&lreq->t);
2516 kfree(lreq);
2517}
2518
2519static void linger_put(struct ceph_osd_linger_request *lreq)
2520{
2521 if (lreq)
2522 kref_put(&lreq->kref, linger_release);
2523}
2524
2525static struct ceph_osd_linger_request *
2526linger_get(struct ceph_osd_linger_request *lreq)
2527{
2528 kref_get(&lreq->kref);
2529 return lreq;
2530}
2531
2532static struct ceph_osd_linger_request *
2533linger_alloc(struct ceph_osd_client *osdc)
2534{
2535 struct ceph_osd_linger_request *lreq;
2536
2537 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2538 if (!lreq)
2539 return NULL;
2540
2541 kref_init(&lreq->kref);
2542 mutex_init(&lreq->lock);
2543 RB_CLEAR_NODE(&lreq->node);
2544 RB_CLEAR_NODE(&lreq->osdc_node);
4609245e 2545 RB_CLEAR_NODE(&lreq->mc_node);
922dab61 2546 INIT_LIST_HEAD(&lreq->scan_item);
b07d3c4b 2547 INIT_LIST_HEAD(&lreq->pending_lworks);
922dab61 2548 init_completion(&lreq->reg_commit_wait);
19079203 2549 init_completion(&lreq->notify_finish_wait);
922dab61
ID		 2550
2551 lreq->osdc = osdc;
2552 target_init(&lreq->t);
2553
2554 dout("%s lreq %p\n", __func__, lreq);
2555 return lreq;
2556}
2557
2558DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2559DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
4609245e 2560DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
922dab61
ID		 2561
2562/*
2563 * Create linger request <-> OSD session relation.
2564 *
2565 * @lreq has to be registered, @osd may be homeless.
2566 */
2567static void link_linger(struct ceph_osd *osd,
2568 struct ceph_osd_linger_request *lreq)
2569{
2570 verify_osd_locked(osd);
2571 WARN_ON(!lreq->linger_id || lreq->osd);
2572 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2573 osd->o_osd, lreq, lreq->linger_id);
2574
2575 if (!osd_homeless(osd))
2576 __remove_osd_from_lru(osd);
2577 else
2578 atomic_inc(&osd->o_osdc->num_homeless);
2579
2580 get_osd(osd);
2581 insert_linger(&osd->o_linger_requests, lreq);
2582 lreq->osd = osd;
2583}
2584
2585static void unlink_linger(struct ceph_osd *osd,
2586 struct ceph_osd_linger_request *lreq)
2587{
2588 verify_osd_locked(osd);
2589 WARN_ON(lreq->osd != osd);
2590 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2591 osd->o_osd, lreq, lreq->linger_id);
2592
2593 lreq->osd = NULL;
2594 erase_linger(&osd->o_linger_requests, lreq);
2595 put_osd(osd);
2596
2597 if (!osd_homeless(osd))
2598 maybe_move_osd_to_lru(osd);
2599 else
2600 atomic_dec(&osd->o_osdc->num_homeless);
2601}
2602
2603static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2604{
2605 verify_osdc_locked(lreq->osdc);
2606
2607 return !RB_EMPTY_NODE(&lreq->osdc_node);
2608}
2609
2610static bool linger_registered(struct ceph_osd_linger_request *lreq)
2611{
2612 struct ceph_osd_client *osdc = lreq->osdc;
2613 bool registered;
2614
2615 down_read(&osdc->lock);
2616 registered = __linger_registered(lreq);
2617 up_read(&osdc->lock);
2618
2619 return registered;
2620}
2621
2622static void linger_register(struct ceph_osd_linger_request *lreq)
2623{
2624 struct ceph_osd_client *osdc = lreq->osdc;
2625
2626 verify_osdc_wrlocked(osdc);
2627 WARN_ON(lreq->linger_id);
2628
2629 linger_get(lreq);
2630 lreq->linger_id = ++osdc->last_linger_id;
2631 insert_linger_osdc(&osdc->linger_requests, lreq);
2632}
2633
2634static void linger_unregister(struct ceph_osd_linger_request *lreq)
2635{
2636 struct ceph_osd_client *osdc = lreq->osdc;
2637
2638 verify_osdc_wrlocked(osdc);
2639
2640 erase_linger_osdc(&osdc->linger_requests, lreq);
2641 linger_put(lreq);
2642}
2643
2644static void cancel_linger_request(struct ceph_osd_request *req)
2645{
2646 struct ceph_osd_linger_request *lreq = req->r_priv;
2647
2648 WARN_ON(!req->r_linger);
2649 cancel_request(req);
2650 linger_put(lreq);
2651}
2652
2653struct linger_work {
2654 struct work_struct work;
2655 struct ceph_osd_linger_request *lreq;
b07d3c4b
ID		 2656 struct list_head pending_item;
2657 unsigned long queued_stamp;
922dab61
ID		 2658
2659 union {
2660 struct {
2661 u64 notify_id;
2662 u64 notifier_id;
2663 void *payload; /* points into @msg front */
2664 size_t payload_len;
2665
2666 struct ceph_msg *msg; /* for ceph_msg_put() */
2667 } notify;
2668 struct {
2669 int err;
2670 } error;
2671 };
2672};
2673
2674static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2675 work_func_t workfn)
2676{
2677 struct linger_work *lwork;
2678
2679 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2680 if (!lwork)
2681 return NULL;
2682
2683 INIT_WORK(&lwork->work, workfn);
b07d3c4b 2684 INIT_LIST_HEAD(&lwork->pending_item);
922dab61
ID		 2685 lwork->lreq = linger_get(lreq);
2686
2687 return lwork;
2688}
2689
2690static void lwork_free(struct linger_work *lwork)
2691{
2692 struct ceph_osd_linger_request *lreq = lwork->lreq;
2693
b07d3c4b
ID		 2694 mutex_lock(&lreq->lock);
2695 list_del(&lwork->pending_item);
2696 mutex_unlock(&lreq->lock);
2697
922dab61
ID		 2698 linger_put(lreq);
2699 kfree(lwork);
2700}
2701
2702static void lwork_queue(struct linger_work *lwork)
2703{
2704 struct ceph_osd_linger_request *lreq = lwork->lreq;
2705 struct ceph_osd_client *osdc = lreq->osdc;
2706
2707 verify_lreq_locked(lreq);
b07d3c4b
ID		 2708 WARN_ON(!list_empty(&lwork->pending_item));
2709
2710 lwork->queued_stamp = jiffies;
2711 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
922dab61
ID		 2712 queue_work(osdc->notify_wq, &lwork->work);
2713}
2714
2715static void do_watch_notify(struct work_struct *w)
2716{
2717 struct linger_work *lwork = container_of(w, struct linger_work, work);
2718 struct ceph_osd_linger_request *lreq = lwork->lreq;
2719
2720 if (!linger_registered(lreq)) {
2721 dout("%s lreq %p not registered\n", __func__, lreq);
2722 goto out;
2723 }
2724
19079203 2725 WARN_ON(!lreq->is_watch);
922dab61
ID		 2726 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2727 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2728 lwork->notify.payload_len);
2729 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2730 lwork->notify.notifier_id, lwork->notify.payload,
2731 lwork->notify.payload_len);
2732
2733out:
2734 ceph_msg_put(lwork->notify.msg);
2735 lwork_free(lwork);
2736}
2737
2738static void do_watch_error(struct work_struct *w)
2739{
2740 struct linger_work *lwork = container_of(w, struct linger_work, work);
2741 struct ceph_osd_linger_request *lreq = lwork->lreq;
2742
2743 if (!linger_registered(lreq)) {
2744 dout("%s lreq %p not registered\n", __func__, lreq);
2745 goto out;
2746 }
2747
2748 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2749 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2750
2751out:
2752 lwork_free(lwork);
2753}
2754
2755static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2756{
2757 struct linger_work *lwork;
2758
2759 lwork = lwork_alloc(lreq, do_watch_error);
2760 if (!lwork) {
2761 pr_err("failed to allocate error-lwork\n");
2762 return;
2763 }
2764
2765 lwork->error.err = lreq->last_error;
2766 lwork_queue(lwork);
2767}
2768
2769static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2770 int result)
2771{
2772 if (!completion_done(&lreq->reg_commit_wait)) {
2773 lreq->reg_commit_error = (result <= 0 ? result : 0);
2774 complete_all(&lreq->reg_commit_wait);
2775 }
2776}
2777
2778static void linger_commit_cb(struct ceph_osd_request *req)
2779{
2780 struct ceph_osd_linger_request *lreq = req->r_priv;
2781
2782 mutex_lock(&lreq->lock);
2783 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2784 lreq->linger_id, req->r_result);
922dab61
ID		 2785 linger_reg_commit_complete(lreq, req->r_result);
2786 lreq->committed = true;
2787
19079203
ID		 2788 if (!lreq->is_watch) {
2789 struct ceph_osd_data *osd_data =
2790 osd_req_op_data(req, 0, notify, response_data);
2791 void *p = page_address(osd_data->pages[0]);
2792
2793 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2794 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2795
2796 /* make note of the notify_id */
2797 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2798 lreq->notify_id = ceph_decode_64(&p);
2799 dout("lreq %p notify_id %llu\n", lreq,
2800 lreq->notify_id);
2801 } else {
2802 dout("lreq %p no notify_id\n", lreq);
2803 }
2804 }
2805
922dab61
ID		 2806 mutex_unlock(&lreq->lock);
2807 linger_put(lreq);
2808}
2809
2810static int normalize_watch_error(int err)
2811{
2812 /*
2813 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2814 * notification and a failure to reconnect because we raced with
2815 * the delete appear the same to the user.
2816 */
2817 if (err == -ENOENT)
2818 err = -ENOTCONN;
2819
2820 return err;
2821}
2822
2823static void linger_reconnect_cb(struct ceph_osd_request *req)
2824{
2825 struct ceph_osd_linger_request *lreq = req->r_priv;
2826
2827 mutex_lock(&lreq->lock);
2828 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2829 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2830 if (req->r_result < 0) {
2831 if (!lreq->last_error) {
2832 lreq->last_error = normalize_watch_error(req->r_result);
2833 queue_watch_error(lreq);
2834 }
2835 }
2836
2837 mutex_unlock(&lreq->lock);
2838 linger_put(lreq);
2839}
2840
2841static void send_linger(struct ceph_osd_linger_request *lreq)
2842{
2843 struct ceph_osd_request *req = lreq->reg_req;
2844 struct ceph_osd_req_op *op = &req->r_ops[0];
2845
2846 verify_osdc_wrlocked(req->r_osdc);
2847 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2848
2849 if (req->r_osd)
2850 cancel_linger_request(req);
2851
2852 request_reinit(req);
2853 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2854 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2855 req->r_flags = lreq->t.flags;
2856 req->r_mtime = lreq->mtime;
2857
2858 mutex_lock(&lreq->lock);
19079203 2859 if (lreq->is_watch && lreq->committed) {
922dab61
ID		 2860 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2861 op->watch.cookie != lreq->linger_id);
2862 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2863 op->watch.gen = ++lreq->register_gen;
2864 dout("lreq %p reconnect register_gen %u\n", lreq,
2865 op->watch.gen);
2866 req->r_callback = linger_reconnect_cb;
2867 } else {
19079203
ID		 2868 if (!lreq->is_watch)
2869 lreq->notify_id = 0;
2870 else
2871 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 2872 dout("lreq %p register\n", lreq);
2873 req->r_callback = linger_commit_cb;
2874 }
2875 mutex_unlock(&lreq->lock);
2876
2877 req->r_priv = linger_get(lreq);
2878 req->r_linger = true;
2879
2880 submit_request(req, true);
2881}
2882
2883static void linger_ping_cb(struct ceph_osd_request *req)
2884{
2885 struct ceph_osd_linger_request *lreq = req->r_priv;
2886
2887 mutex_lock(&lreq->lock);
2888 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
2889 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
2890 lreq->last_error);
2891 if (lreq->register_gen == req->r_ops[0].watch.gen) {
b07d3c4b
ID		 2892 if (!req->r_result) {
2893 lreq->watch_valid_thru = lreq->ping_sent;
2894 } else if (!lreq->last_error) {
922dab61
ID		 2895 lreq->last_error = normalize_watch_error(req->r_result);
2896 queue_watch_error(lreq);
2897 }
2898 } else {
2899 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
2900 lreq->register_gen, req->r_ops[0].watch.gen);
2901 }
2902
2903 mutex_unlock(&lreq->lock);
2904 linger_put(lreq);
2905}
2906
2907static void send_linger_ping(struct ceph_osd_linger_request *lreq)
2908{
2909 struct ceph_osd_client *osdc = lreq->osdc;
2910 struct ceph_osd_request *req = lreq->ping_req;
2911 struct ceph_osd_req_op *op = &req->r_ops[0];
2912
b7ec35b3 2913 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
922dab61
ID		 2914 dout("%s PAUSERD\n", __func__);
2915 return;
2916 }
2917
2918 lreq->ping_sent = jiffies;
2919 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
2920 __func__, lreq, lreq->linger_id, lreq->ping_sent,
2921 lreq->register_gen);
2922
2923 if (req->r_osd)
2924 cancel_linger_request(req);
2925
2926 request_reinit(req);
2927 target_copy(&req->r_t, &lreq->t);
2928
2929 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2930 op->watch.cookie != lreq->linger_id ||
2931 op->watch.op != CEPH_OSD_WATCH_OP_PING);
2932 op->watch.gen = lreq->register_gen;
2933 req->r_callback = linger_ping_cb;
2934 req->r_priv = linger_get(lreq);
2935 req->r_linger = true;
2936
2937 ceph_osdc_get_request(req);
2938 account_request(req);
2939 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2940 link_request(lreq->osd, req);
2941 send_request(req);
2942}
2943
2944static void linger_submit(struct ceph_osd_linger_request *lreq)
2945{
2946 struct ceph_osd_client *osdc = lreq->osdc;
2947 struct ceph_osd *osd;
2948
7de030d6 2949 calc_target(osdc, &lreq->t, NULL, false);
922dab61
ID		 2950 osd = lookup_create_osd(osdc, lreq->t.osd, true);
2951 link_linger(osd, lreq);
2952
2953 send_linger(lreq);
2954}
2955
4609245e
ID		 2956static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
2957{
2958 struct ceph_osd_client *osdc = lreq->osdc;
2959 struct ceph_osd_linger_request *lookup_lreq;
2960
2961 verify_osdc_wrlocked(osdc);
2962
2963 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2964 lreq->linger_id);
2965 if (!lookup_lreq)
2966 return;
2967
2968 WARN_ON(lookup_lreq != lreq);
2969 erase_linger_mc(&osdc->linger_map_checks, lreq);
2970 linger_put(lreq);
2971}
2972
922dab61
ID		 2973/*
2974 * @lreq has to be both registered and linked.
2975 */
2976static void __linger_cancel(struct ceph_osd_linger_request *lreq)
2977{
19079203 2978 if (lreq->is_watch && lreq->ping_req->r_osd)
922dab61
ID		 2979 cancel_linger_request(lreq->ping_req);
2980 if (lreq->reg_req->r_osd)
2981 cancel_linger_request(lreq->reg_req);
4609245e 2982 cancel_linger_map_check(lreq);
922dab61
ID		 2983 unlink_linger(lreq->osd, lreq);
2984 linger_unregister(lreq);
2985}
2986
2987static void linger_cancel(struct ceph_osd_linger_request *lreq)
2988{
2989 struct ceph_osd_client *osdc = lreq->osdc;
2990
2991 down_write(&osdc->lock);
2992 if (__linger_registered(lreq))
2993 __linger_cancel(lreq);
2994 up_write(&osdc->lock);
2995}
2996
4609245e
ID		 2997static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
2998
2999static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3000{
3001 struct ceph_osd_client *osdc = lreq->osdc;
3002 struct ceph_osdmap *map = osdc->osdmap;
3003
3004 verify_osdc_wrlocked(osdc);
3005 WARN_ON(!map->epoch);
3006
3007 if (lreq->register_gen) {
3008 lreq->map_dne_bound = map->epoch;
3009 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3010 lreq, lreq->linger_id);
3011 } else {
3012 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3013 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3014 map->epoch);
3015 }
3016
3017 if (lreq->map_dne_bound) {
3018 if (map->epoch >= lreq->map_dne_bound) {
3019 /* we had a new enough map */
3020 pr_info("linger_id %llu pool does not exist\n",
3021 lreq->linger_id);
3022 linger_reg_commit_complete(lreq, -ENOENT);
3023 __linger_cancel(lreq);
3024 }
3025 } else {
3026 send_linger_map_check(lreq);
3027 }
3028}
3029
3030static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3031{
3032 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3033 struct ceph_osd_linger_request *lreq;
3034 u64 linger_id = greq->private_data;
3035
3036 WARN_ON(greq->result || !greq->u.newest);
3037
3038 down_write(&osdc->lock);
3039 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3040 if (!lreq) {
3041 dout("%s linger_id %llu dne\n", __func__, linger_id);
3042 goto out_unlock;
3043 }
3044
3045 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3046 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3047 greq->u.newest);
3048 if (!lreq->map_dne_bound)
3049 lreq->map_dne_bound = greq->u.newest;
3050 erase_linger_mc(&osdc->linger_map_checks, lreq);
3051 check_linger_pool_dne(lreq);
3052
3053 linger_put(lreq);
3054out_unlock:
3055 up_write(&osdc->lock);
3056}
3057
3058static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3059{
3060 struct ceph_osd_client *osdc = lreq->osdc;
3061 struct ceph_osd_linger_request *lookup_lreq;
3062 int ret;
3063
3064 verify_osdc_wrlocked(osdc);
3065
3066 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3067 lreq->linger_id);
3068 if (lookup_lreq) {
3069 WARN_ON(lookup_lreq != lreq);
3070 return;
3071 }
3072
3073 linger_get(lreq);
3074 insert_linger_mc(&osdc->linger_map_checks, lreq);
3075 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3076 linger_map_check_cb, lreq->linger_id);
3077 WARN_ON(ret);
3078}
3079
922dab61
ID		 3080static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3081{
3082 int ret;
3083
3084 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3085 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3086 return ret ?: lreq->reg_commit_error;
3087}
3088
19079203
ID		 3089static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3090{
3091 int ret;
3092
3093 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3094 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3095 return ret ?: lreq->notify_finish_error;
3096}
3097
f24e9980 3098/*
fbca9635
ID		 3099 * Timeout callback, called every N seconds. When 1 or more OSD
3100 * requests has been active for more than N seconds, we send a keepalive
3101 * (tag + timestamp) to its OSD to ensure any communications channel
3102 * reset is detected.
f24e9980
SW		 3103 */
3104static void handle_timeout(struct work_struct *work)
3105{
3106 struct ceph_osd_client *osdc =
3107 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 3108 struct ceph_options *opts = osdc->client->options;
5aea3dcd 3109 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
7cc5e38f 3110 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
5aea3dcd
ID		 3111 LIST_HEAD(slow_osds);
3112 struct rb_node *n, *p;
f24e9980 3113
5aea3dcd
ID		 3114 dout("%s osdc %p\n", __func__, osdc);
3115 down_write(&osdc->lock);
f24e9980 3116
422d2cb8
YS		 3117 /*
3118 * ping osds that are a bit slow. this ensures that if there
3119 * is a break in the TCP connection we will notice, and reopen
3120 * a connection with that osd (from the fault callback).
3121 */
5aea3dcd
ID		 3122 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3123 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3124 bool found = false;
3125
7cc5e38f 3126 for (p = rb_first(&osd->o_requests); p; ) {
5aea3dcd
ID		 3127 struct ceph_osd_request *req =
3128 rb_entry(p, struct ceph_osd_request, r_node);
3129
7cc5e38f
ID		 3130 p = rb_next(p); /* abort_request() */
3131
5aea3dcd
ID		 3132 if (time_before(req->r_stamp, cutoff)) {
3133 dout(" req %p tid %llu on osd%d is laggy\n",
3134 req, req->r_tid, osd->o_osd);
3135 found = true;
3136 }
7cc5e38f
ID		 3137 if (opts->osd_request_timeout &&
3138 time_before(req->r_start_stamp, expiry_cutoff)) {
3139 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3140 req->r_tid, osd->o_osd);
3141 abort_request(req, -ETIMEDOUT);
3142 }
5aea3dcd 3143 }
922dab61
ID		 3144 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3145 struct ceph_osd_linger_request *lreq =
3146 rb_entry(p, struct ceph_osd_linger_request, node);
3147
3148 dout(" lreq %p linger_id %llu is served by osd%d\n",
3149 lreq, lreq->linger_id, osd->o_osd);
3150 found = true;
3151
3152 mutex_lock(&lreq->lock);
19079203 3153 if (lreq->is_watch && lreq->committed && !lreq->last_error)
922dab61
ID		 3154 send_linger_ping(lreq);
3155 mutex_unlock(&lreq->lock);
3156 }
422d2cb8 3157
5aea3dcd
ID		 3158 if (found)
3159 list_move_tail(&osd->o_keepalive_item, &slow_osds);
422d2cb8 3160 }
5aea3dcd 3161
7cc5e38f
ID		 3162 if (opts->osd_request_timeout) {
3163 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3164 struct ceph_osd_request *req =
3165 rb_entry(p, struct ceph_osd_request, r_node);
3166
3167 p = rb_next(p); /* abort_request() */
3168
3169 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3170 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3171 req->r_tid, osdc->homeless_osd.o_osd);
3172 abort_request(req, -ETIMEDOUT);
3173 }
3174 }
3175 }
3176
5aea3dcd
ID		 3177 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3178 maybe_request_map(osdc);
3179
422d2cb8 3180 while (!list_empty(&slow_osds)) {
5aea3dcd
ID		 3181 struct ceph_osd *osd = list_first_entry(&slow_osds,
3182 struct ceph_osd,
3183 o_keepalive_item);
422d2cb8 3184 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 3185 ceph_con_keepalive(&osd->o_con);
3186 }
3187
5aea3dcd 3188 up_write(&osdc->lock);
fbca9635
ID		 3189 schedule_delayed_work(&osdc->timeout_work,
3190 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 3191}
3192
f5a2041b
YS		 3193static void handle_osds_timeout(struct work_struct *work)
3194{
3195 struct ceph_osd_client *osdc =
3196 container_of(work, struct ceph_osd_client,
3197 osds_timeout_work.work);
a319bf56 3198 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 3199 struct ceph_osd *osd, *nosd;
f5a2041b 3200
42a2c09f 3201 dout("%s osdc %p\n", __func__, osdc);
5aea3dcd 3202 down_write(&osdc->lock);
42a2c09f
ID		 3203 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3204 if (time_before(jiffies, osd->lru_ttl))
3205 break;
3206
5aea3dcd 3207 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 3208 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
5aea3dcd 3209 close_osd(osd);
42a2c09f 3210 }
f5a2041b 3211
5aea3dcd 3212 up_write(&osdc->lock);
f5a2041b
YS		 3213 schedule_delayed_work(&osdc->osds_timeout_work,
3214 round_jiffies_relative(delay));
3215}
3216
205ee118
ID		 3217static int ceph_oloc_decode(void **p, void *end,
3218 struct ceph_object_locator *oloc)
3219{
3220 u8 struct_v, struct_cv;
3221 u32 len;
3222 void *struct_end;
3223 int ret = 0;
3224
3225 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3226 struct_v = ceph_decode_8(p);
3227 struct_cv = ceph_decode_8(p);
3228 if (struct_v < 3) {
3229 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3230 struct_v, struct_cv);
3231 goto e_inval;
3232 }
3233 if (struct_cv > 6) {
3234 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3235 struct_v, struct_cv);
3236 goto e_inval;
3237 }
3238 len = ceph_decode_32(p);
3239 ceph_decode_need(p, end, len, e_inval);
3240 struct_end = *p + len;
3241
3242 oloc->pool = ceph_decode_64(p);
3243 *p += 4; /* skip preferred */
3244
3245 len = ceph_decode_32(p);
3246 if (len > 0) {
3247 pr_warn("ceph_object_locator::key is set\n");
3248 goto e_inval;
3249 }
3250
3251 if (struct_v >= 5) {
cd08e0a2
YZ		 3252 bool changed = false;
3253
205ee118
ID		 3254 len = ceph_decode_32(p);
3255 if (len > 0) {
30c156d9 3256 ceph_decode_need(p, end, len, e_inval);
cd08e0a2
YZ		 3257 if (!oloc->pool_ns ||
3258 ceph_compare_string(oloc->pool_ns, *p, len))
3259 changed = true;
30c156d9 3260 *p += len;
cd08e0a2
YZ		 3261 } else {
3262 if (oloc->pool_ns)
3263 changed = true;
3264 }
3265 if (changed) {
3266 /* redirect changes namespace */
3267 pr_warn("ceph_object_locator::nspace is changed\n");
3268 goto e_inval;
205ee118
ID		 3269 }
3270 }
3271
3272 if (struct_v >= 6) {
3273 s64 hash = ceph_decode_64(p);
3274 if (hash != -1) {
3275 pr_warn("ceph_object_locator::hash is set\n");
3276 goto e_inval;
3277 }
3278 }
3279
3280 /* skip the rest */
3281 *p = struct_end;
3282out:
3283 return ret;
3284
3285e_inval:
3286 ret = -EINVAL;
3287 goto out;
3288}
3289
3290static int ceph_redirect_decode(void **p, void *end,
3291 struct ceph_request_redirect *redir)
3292{
3293 u8 struct_v, struct_cv;
3294 u32 len;
3295 void *struct_end;
3296 int ret;
3297
3298 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3299 struct_v = ceph_decode_8(p);
3300 struct_cv = ceph_decode_8(p);
3301 if (struct_cv > 1) {
3302 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3303 struct_v, struct_cv);
3304 goto e_inval;
3305 }
3306 len = ceph_decode_32(p);
3307 ceph_decode_need(p, end, len, e_inval);
3308 struct_end = *p + len;
3309
3310 ret = ceph_oloc_decode(p, end, &redir->oloc);
3311 if (ret)
3312 goto out;
3313
3314 len = ceph_decode_32(p);
3315 if (len > 0) {
3316 pr_warn("ceph_request_redirect::object_name is set\n");
3317 goto e_inval;
3318 }
3319
3320 len = ceph_decode_32(p);
3321 *p += len; /* skip osd_instructions */
3322
3323 /* skip the rest */
3324 *p = struct_end;
3325out:
3326 return ret;
3327
3328e_inval:
3329 ret = -EINVAL;
3330 goto out;
3331}
3332
fe5da05e
ID		 3333struct MOSDOpReply {
3334 struct ceph_pg pgid;
3335 u64 flags;
3336 int result;
3337 u32 epoch;
3338 int num_ops;
3339 u32 outdata_len[CEPH_OSD_MAX_OPS];
3340 s32 rval[CEPH_OSD_MAX_OPS];
3341 int retry_attempt;
3342 struct ceph_eversion replay_version;
3343 u64 user_version;
3344 struct ceph_request_redirect redirect;
3345};
25845472 3346
fe5da05e 3347static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 3348{
fe5da05e
ID		 3349 void *p = msg->front.iov_base;
3350 void *const end = p + msg->front.iov_len;
3351 u16 version = le16_to_cpu(msg->hdr.version);
3352 struct ceph_eversion bad_replay_version;
b0b31a8f 3353 u8 decode_redir;
fe5da05e
ID		 3354 u32 len;
3355 int ret;
3356 int i;
1b83bef2 3357
fe5da05e
ID		 3358 ceph_decode_32_safe(&p, end, len, e_inval);
3359 ceph_decode_need(&p, end, len, e_inval);
3360 p += len; /* skip oid */
1b83bef2 3361
fe5da05e
ID		 3362 ret = ceph_decode_pgid(&p, end, &m->pgid);
3363 if (ret)
3364 return ret;
1b83bef2 3365
fe5da05e
ID		 3366 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3367 ceph_decode_32_safe(&p, end, m->result, e_inval);
3368 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3369 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3370 p += sizeof(bad_replay_version);
3371 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 3372
fe5da05e
ID		 3373 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3374 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3375 goto e_inval;
1b83bef2 3376
fe5da05e
ID		 3377 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3378 e_inval);
3379 for (i = 0; i < m->num_ops; i++) {
1b83bef2 3380 struct ceph_osd_op *op = p;
1b83bef2 3381
fe5da05e 3382 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 3383 p += sizeof(*op);
3384 }
1b83bef2 3385
fe5da05e
ID		 3386 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3387 for (i = 0; i < m->num_ops; i++)
3388 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 3389
fe5da05e
ID		 3390 if (version >= 5) {
3391 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3392 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3393 p += sizeof(m->replay_version);
3394 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3395 } else {
3396 m->replay_version = bad_replay_version; /* struct */
3397 m->user_version = le64_to_cpu(m->replay_version.version);
3398 }
eb845ff1 3399
fe5da05e
ID		 3400 if (version >= 6) {
3401 if (version >= 7)
3402 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 3403 else
3404 decode_redir = 1;
3405 } else {
3406 decode_redir = 0;
3407 }
3408
3409 if (decode_redir) {
fe5da05e
ID		 3410 ret = ceph_redirect_decode(&p, end, &m->redirect);
3411 if (ret)
3412 return ret;
205ee118 3413 } else {
fe5da05e 3414 ceph_oloc_init(&m->redirect.oloc);
205ee118 3415 }
f24e9980 3416
fe5da05e
ID		 3417 return 0;
3418
3419e_inval:
3420 return -EINVAL;
3421}
3422
3423/*
b18b9550
ID		 3424 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3425 * specified.
fe5da05e 3426 */
5aea3dcd 3427static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
fe5da05e 3428{
5aea3dcd 3429 struct ceph_osd_client *osdc = osd->o_osdc;
fe5da05e
ID		 3430 struct ceph_osd_request *req;
3431 struct MOSDOpReply m;
3432 u64 tid = le64_to_cpu(msg->hdr.tid);
3433 u32 data_len = 0;
fe5da05e
ID		 3434 int ret;
3435 int i;
3436
3437 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3438
5aea3dcd
ID		 3439 down_read(&osdc->lock);
3440 if (!osd_registered(osd)) {
3441 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3442 goto out_unlock_osdc;
3443 }
3444 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3445
3446 mutex_lock(&osd->lock);
3447 req = lookup_request(&osd->o_requests, tid);
fe5da05e 3448 if (!req) {
5aea3dcd
ID		 3449 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3450 goto out_unlock_session;
fe5da05e 3451 }
fe5da05e 3452
cd08e0a2 3453 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
fe5da05e 3454 ret = decode_MOSDOpReply(msg, &m);
cd08e0a2 3455 m.redirect.oloc.pool_ns = NULL;
fe5da05e
ID		 3456 if (ret) {
3457 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3458 req->r_tid, ret);
3459 ceph_msg_dump(msg);
3460 goto fail_request;
3461 }
3462 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3463 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3464 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3465 le64_to_cpu(m.replay_version.version), m.user_version);
3466
3467 if (m.retry_attempt >= 0) {
3468 if (m.retry_attempt != req->r_attempts - 1) {
3469 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3470 req, req->r_tid, m.retry_attempt,
3471 req->r_attempts - 1);
5aea3dcd 3472 goto out_unlock_session;
fe5da05e
ID		 3473 }
3474 } else {
3475 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3476 }
3477
3478 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3479 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3480 m.redirect.oloc.pool);
5aea3dcd
ID		 3481 unlink_request(osd, req);
3482 mutex_unlock(&osd->lock);
205ee118 3483
30c156d9
YZ		 3484 /*
3485 * Not ceph_oloc_copy() - changing pool_ns is not
3486 * supported.
3487 */
3488 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
5aea3dcd
ID		 3489 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
3490 req->r_tid = 0;
3491 __submit_request(req, false);
3492 goto out_unlock_osdc;
205ee118
ID		 3493 }
3494
fe5da05e
ID		 3495 if (m.num_ops != req->r_num_ops) {
3496 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3497 req->r_num_ops, req->r_tid);
3498 goto fail_request;
f24e9980 3499 }
fe5da05e
ID		 3500 for (i = 0; i < req->r_num_ops; i++) {
3501 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3502 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3503 req->r_ops[i].rval = m.rval[i];
3504 req->r_ops[i].outdata_len = m.outdata_len[i];
3505 data_len += m.outdata_len[i];
3506 }
3507 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3508 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3509 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3510 goto fail_request;
3511 }
b18b9550
ID		 3512 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3513 req, req->r_tid, m.result, data_len);
f24e9980 3514
b18b9550
ID		 3515 /*
3516 * Since we only ever request ONDISK, we should only ever get
3517 * one (type of) reply back.
3518 */
3519 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3520 req->r_result = m.result ?: data_len;
3521 finish_request(req);
5aea3dcd
ID		 3522 mutex_unlock(&osd->lock);
3523 up_read(&osdc->lock);
f24e9980 3524
b18b9550
ID		 3525 __complete_request(req);
3526 complete_all(&req->r_completion);
3527 ceph_osdc_put_request(req);
f24e9980
SW		 3528 return;
3529
fe5da05e 3530fail_request:
4609245e 3531 complete_request(req, -EIO);
5aea3dcd
ID		 3532out_unlock_session:
3533 mutex_unlock(&osd->lock);
3534out_unlock_osdc:
3535 up_read(&osdc->lock);
f24e9980
SW		 3536}
3537
42c1b124
ID		 3538static void set_pool_was_full(struct ceph_osd_client *osdc)
3539{
3540 struct rb_node *n;
3541
3542 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3543 struct ceph_pg_pool_info *pi =
3544 rb_entry(n, struct ceph_pg_pool_info, node);
3545
3546 pi->was_full = __pool_full(pi);
3547 }
3548}
3549
5aea3dcd 3550static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
f24e9980 3551{
5aea3dcd 3552 struct ceph_pg_pool_info *pi;
f24e9980 3553
5aea3dcd
ID		 3554 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3555 if (!pi)
3556 return false;
f24e9980 3557
5aea3dcd 3558 return pi->was_full && !__pool_full(pi);
422d2cb8
YS		 3559}
3560
922dab61
ID		 3561static enum calc_target_result
3562recalc_linger_target(struct ceph_osd_linger_request *lreq)
3563{
3564 struct ceph_osd_client *osdc = lreq->osdc;
3565 enum calc_target_result ct_res;
3566
7de030d6 3567 ct_res = calc_target(osdc, &lreq->t, NULL, true);
922dab61
ID		 3568 if (ct_res == CALC_TARGET_NEED_RESEND) {
3569 struct ceph_osd *osd;
3570
3571 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3572 if (osd != lreq->osd) {
3573 unlink_linger(lreq->osd, lreq);
3574 link_linger(osd, lreq);
3575 }
3576 }
3577
3578 return ct_res;
3579}
3580
422d2cb8 3581/*
5aea3dcd 3582 * Requeue requests whose mapping to an OSD has changed.
422d2cb8 3583 */
5aea3dcd
ID		 3584static void scan_requests(struct ceph_osd *osd,
3585 bool force_resend,
3586 bool cleared_full,
3587 bool check_pool_cleared_full,
3588 struct rb_root *need_resend,
3589 struct list_head *need_resend_linger)
422d2cb8 3590{
5aea3dcd
ID		 3591 struct ceph_osd_client *osdc = osd->o_osdc;
3592 struct rb_node *n;
3593 bool force_resend_writes;
3594
922dab61
ID		 3595 for (n = rb_first(&osd->o_linger_requests); n; ) {
3596 struct ceph_osd_linger_request *lreq =
3597 rb_entry(n, struct ceph_osd_linger_request, node);
3598 enum calc_target_result ct_res;
3599
3600 n = rb_next(n); /* recalc_linger_target() */
3601
3602 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3603 lreq->linger_id);
3604 ct_res = recalc_linger_target(lreq);
3605 switch (ct_res) {
3606 case CALC_TARGET_NO_ACTION:
3607 force_resend_writes = cleared_full ||
3608 (check_pool_cleared_full &&
3609 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3610 if (!force_resend && !force_resend_writes)
3611 break;
3612
3613 /* fall through */
3614 case CALC_TARGET_NEED_RESEND:
4609245e 3615 cancel_linger_map_check(lreq);
922dab61
ID		 3616 /*
3617 * scan_requests() for the previous epoch(s)
3618 * may have already added it to the list, since
3619 * it's not unlinked here.
3620 */
3621 if (list_empty(&lreq->scan_item))
3622 list_add_tail(&lreq->scan_item, need_resend_linger);
3623 break;
3624 case CALC_TARGET_POOL_DNE:
a10bcb19 3625 list_del_init(&lreq->scan_item);
4609245e 3626 check_linger_pool_dne(lreq);
922dab61
ID		 3627 break;
3628 }
3629 }
3630
5aea3dcd
ID		 3631 for (n = rb_first(&osd->o_requests); n; ) {
3632 struct ceph_osd_request *req =
3633 rb_entry(n, struct ceph_osd_request, r_node);
3634 enum calc_target_result ct_res;
3635
4609245e 3636 n = rb_next(n); /* unlink_request(), check_pool_dne() */
5aea3dcd
ID		 3637
3638 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
7de030d6
ID		 3639 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
3640 false);
5aea3dcd
ID		 3641 switch (ct_res) {
3642 case CALC_TARGET_NO_ACTION:
3643 force_resend_writes = cleared_full ||
3644 (check_pool_cleared_full &&
3645 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3646 if (!force_resend &&
3647 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3648 !force_resend_writes))
3649 break;
3650
3651 /* fall through */
3652 case CALC_TARGET_NEED_RESEND:
4609245e 3653 cancel_map_check(req);
5aea3dcd
ID		 3654 unlink_request(osd, req);
3655 insert_request(need_resend, req);
3656 break;
3657 case CALC_TARGET_POOL_DNE:
4609245e 3658 check_pool_dne(req);
5aea3dcd 3659 break;
b0494532 3660 }
6f6c7006 3661 }
422d2cb8 3662}
6f6c7006 3663
42c1b124 3664static int handle_one_map(struct ceph_osd_client *osdc,
5aea3dcd
ID		 3665 void *p, void *end, bool incremental,
3666 struct rb_root *need_resend,
3667 struct list_head *need_resend_linger)
42c1b124
ID		 3668{
3669 struct ceph_osdmap *newmap;
3670 struct rb_node *n;
3671 bool skipped_map = false;
3672 bool was_full;
3673
b7ec35b3 3674 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
42c1b124
ID		 3675 set_pool_was_full(osdc);
3676
3677 if (incremental)
3678 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3679 else
3680 newmap = ceph_osdmap_decode(&p, end);
3681 if (IS_ERR(newmap))
3682 return PTR_ERR(newmap);
3683
3684 if (newmap != osdc->osdmap) {
3685 /*
3686 * Preserve ->was_full before destroying the old map.
3687 * For pools that weren't in the old map, ->was_full
3688 * should be false.
3689 */
3690 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3691 struct ceph_pg_pool_info *pi =
3692 rb_entry(n, struct ceph_pg_pool_info, node);
3693 struct ceph_pg_pool_info *old_pi;
3694
3695 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3696 if (old_pi)
3697 pi->was_full = old_pi->was_full;
3698 else
3699 WARN_ON(pi->was_full);
3700 }
3701
3702 if (osdc->osdmap->epoch &&
3703 osdc->osdmap->epoch + 1 < newmap->epoch) {
3704 WARN_ON(incremental);
3705 skipped_map = true;
3706 }
3707
3708 ceph_osdmap_destroy(osdc->osdmap);
3709 osdc->osdmap = newmap;
3710 }
3711
b7ec35b3 3712 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
5aea3dcd
ID		 3713 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3714 need_resend, need_resend_linger);
3715
3716 for (n = rb_first(&osdc->osds); n; ) {
3717 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3718
3719 n = rb_next(n); /* close_osd() */
3720
3721 scan_requests(osd, skipped_map, was_full, true, need_resend,
3722 need_resend_linger);
3723 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3724 memcmp(&osd->o_con.peer_addr,
3725 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3726 sizeof(struct ceph_entity_addr)))
3727 close_osd(osd);
3728 }
42c1b124
ID		 3729
3730 return 0;
3731}
6f6c7006 3732
5aea3dcd
ID		 3733static void kick_requests(struct ceph_osd_client *osdc,
3734 struct rb_root *need_resend,
3735 struct list_head *need_resend_linger)
3736{
922dab61 3737 struct ceph_osd_linger_request *lreq, *nlreq;
04c7d789 3738 enum calc_target_result ct_res;
5aea3dcd
ID		 3739 struct rb_node *n;
3740
04c7d789
ID		 3741 /* make sure need_resend targets reflect latest map */
3742 for (n = rb_first(need_resend); n; ) {
3743 struct ceph_osd_request *req =
3744 rb_entry(n, struct ceph_osd_request, r_node);
3745
3746 n = rb_next(n);
3747
3748 if (req->r_t.epoch < osdc->osdmap->epoch) {
3749 ct_res = calc_target(osdc, &req->r_t, NULL, false);
3750 if (ct_res == CALC_TARGET_POOL_DNE) {
3751 erase_request(need_resend, req);
3752 check_pool_dne(req);
3753 }
3754 }
3755 }
3756
5aea3dcd
ID		 3757 for (n = rb_first(need_resend); n; ) {
3758 struct ceph_osd_request *req =
3759 rb_entry(n, struct ceph_osd_request, r_node);
3760 struct ceph_osd *osd;
3761
3762 n = rb_next(n);
3763 erase_request(need_resend, req); /* before link_request() */
3764
5aea3dcd
ID		 3765 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3766 link_request(osd, req);
3767 if (!req->r_linger) {
3768 if (!osd_homeless(osd) && !req->r_t.paused)
3769 send_request(req);
922dab61
ID		 3770 } else {
3771 cancel_linger_request(req);
5aea3dcd
ID		 3772 }
3773 }
922dab61
ID		 3774
3775 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3776 if (!osd_homeless(lreq->osd))
3777 send_linger(lreq);
3778
3779 list_del_init(&lreq->scan_item);
3780 }
5aea3dcd
ID		 3781}
3782
f24e9980
SW		 3783/*
3784 * Process updated osd map.
3785 *
3786 * The message contains any number of incremental and full maps, normally
3787 * indicating some sort of topology change in the cluster. Kick requests
3788 * off to different OSDs as needed.
3789 */
3790void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3791{
42c1b124
ID		 3792 void *p = msg->front.iov_base;
3793 void *const end = p + msg->front.iov_len;
f24e9980
SW		 3794 u32 nr_maps, maplen;
3795 u32 epoch;
f24e9980 3796 struct ceph_fsid fsid;
5aea3dcd
ID		 3797 struct rb_root need_resend = RB_ROOT;
3798 LIST_HEAD(need_resend_linger);
42c1b124
ID		 3799 bool handled_incremental = false;
3800 bool was_pauserd, was_pausewr;
3801 bool pauserd, pausewr;
3802 int err;
f24e9980 3803
42c1b124 3804 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
5aea3dcd 3805 down_write(&osdc->lock);
f24e9980
SW		 3806
3807 /* verify fsid */
3808 ceph_decode_need(&p, end, sizeof(fsid), bad);
3809 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 3810 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 3811 goto bad;
f24e9980 3812
b7ec35b3
ID		 3813 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3814 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3815 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3816 have_pool_full(osdc);
9a1ea2db 3817
f24e9980
SW		 3818 /* incremental maps */
3819 ceph_decode_32_safe(&p, end, nr_maps, bad);
3820 dout(" %d inc maps\n", nr_maps);
3821 while (nr_maps > 0) {
3822 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3823 epoch = ceph_decode_32(&p);
3824 maplen = ceph_decode_32(&p);
f24e9980 3825 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 3826 if (osdc->osdmap->epoch &&
3827 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 3828 dout("applying incremental map %u len %d\n",
3829 epoch, maplen);
5aea3dcd
ID		 3830 err = handle_one_map(osdc, p, p + maplen, true,
3831 &need_resend, &need_resend_linger);
42c1b124 3832 if (err)
f24e9980 3833 goto bad;
42c1b124 3834 handled_incremental = true;
f24e9980
SW		 3835 } else {
3836 dout("ignoring incremental map %u len %d\n",
3837 epoch, maplen);
3838 }
42c1b124 3839 p += maplen;
f24e9980
SW		 3840 nr_maps--;
3841 }
42c1b124 3842 if (handled_incremental)
f24e9980
SW		 3843 goto done;
3844
3845 /* full maps */
3846 ceph_decode_32_safe(&p, end, nr_maps, bad);
3847 dout(" %d full maps\n", nr_maps);
3848 while (nr_maps) {
3849 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3850 epoch = ceph_decode_32(&p);
3851 maplen = ceph_decode_32(&p);
f24e9980
SW		 3852 ceph_decode_need(&p, end, maplen, bad);
3853 if (nr_maps > 1) {
3854 dout("skipping non-latest full map %u len %d\n",
3855 epoch, maplen);
e5253a7b 3856 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 3857 dout("skipping full map %u len %d, "
3858 "older than our %u\n", epoch, maplen,
3859 osdc->osdmap->epoch);
3860 } else {
3861 dout("taking full map %u len %d\n", epoch, maplen);
5aea3dcd
ID		 3862 err = handle_one_map(osdc, p, p + maplen, false,
3863 &need_resend, &need_resend_linger);
42c1b124 3864 if (err)
f24e9980 3865 goto bad;
f24e9980
SW		 3866 }
3867 p += maplen;
3868 nr_maps--;
3869 }
3870
3871done:
cd634fb6
SW		 3872 /*
3873 * subscribe to subsequent osdmap updates if full to ensure
3874 * we find out when we are no longer full and stop returning
3875 * ENOSPC.
3876 */
b7ec35b3
ID		 3877 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3878 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3879 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3880 have_pool_full(osdc);
58eb7932
JL		 3881 if (was_pauserd || was_pausewr || pauserd || pausewr ||
3882 osdc->osdmap->epoch < osdc->epoch_barrier)
42c1b124 3883 maybe_request_map(osdc);
cd634fb6 3884
5aea3dcd 3885 kick_requests(osdc, &need_resend, &need_resend_linger);
42c1b124 3886
fc36d0a4 3887 ceph_osdc_abort_on_full(osdc);
42c1b124
ID		 3888 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
3889 osdc->osdmap->epoch);
5aea3dcd 3890 up_write(&osdc->lock);
03066f23 3891 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 3892 return;
3893
3894bad:
3895 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 3896 ceph_msg_dump(msg);
5aea3dcd
ID		 3897 up_write(&osdc->lock);
3898}
3899
3900/*
3901 * Resubmit requests pending on the given osd.
3902 */
3903static void kick_osd_requests(struct ceph_osd *osd)
3904{
3905 struct rb_node *n;
3906
a02a946d
ID		 3907 clear_backoffs(osd);
3908
922dab61 3909 for (n = rb_first(&osd->o_requests); n; ) {
5aea3dcd
ID		 3910 struct ceph_osd_request *req =
3911 rb_entry(n, struct ceph_osd_request, r_node);
3912
922dab61
ID		 3913 n = rb_next(n); /* cancel_linger_request() */
3914
5aea3dcd
ID		 3915 if (!req->r_linger) {
3916 if (!req->r_t.paused)
3917 send_request(req);
922dab61
ID		 3918 } else {
3919 cancel_linger_request(req);
5aea3dcd
ID		 3920 }
3921 }
922dab61
ID		 3922 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
3923 struct ceph_osd_linger_request *lreq =
3924 rb_entry(n, struct ceph_osd_linger_request, node);
3925
3926 send_linger(lreq);
3927 }
5aea3dcd
ID		 3928}
3929
3930/*
3931 * If the osd connection drops, we need to resubmit all requests.
3932 */
3933static void osd_fault(struct ceph_connection *con)
3934{
3935 struct ceph_osd *osd = con->private;
3936 struct ceph_osd_client *osdc = osd->o_osdc;
3937
3938 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
3939
3940 down_write(&osdc->lock);
3941 if (!osd_registered(osd)) {
3942 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3943 goto out_unlock;
3944 }
3945
3946 if (!reopen_osd(osd))
3947 kick_osd_requests(osd);
3948 maybe_request_map(osdc);
3949
3950out_unlock:
3951 up_write(&osdc->lock);
f24e9980
SW		 3952}
3953
a02a946d
ID		 3954struct MOSDBackoff {
3955 struct ceph_spg spgid;
3956 u32 map_epoch;
3957 u8 op;
3958 u64 id;
3959 struct ceph_hobject_id *begin;
3960 struct ceph_hobject_id *end;
3961};
3962
3963static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
3964{
3965 void *p = msg->front.iov_base;
3966 void *const end = p + msg->front.iov_len;
3967 u8 struct_v;
3968 u32 struct_len;
3969 int ret;
3970
3971 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
3972 if (ret)
3973 return ret;
3974
3975 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
3976 if (ret)
3977 return ret;
3978
3979 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
3980 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
3981 ceph_decode_8_safe(&p, end, m->op, e_inval);
3982 ceph_decode_64_safe(&p, end, m->id, e_inval);
3983
3984 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
3985 if (!m->begin)
3986 return -ENOMEM;
3987
3988 ret = decode_hoid(&p, end, m->begin);
3989 if (ret) {
3990 free_hoid(m->begin);
3991 return ret;
3992 }
3993
3994 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
3995 if (!m->end) {
3996 free_hoid(m->begin);
3997 return -ENOMEM;
3998 }
3999
4000 ret = decode_hoid(&p, end, m->end);
4001 if (ret) {
4002 free_hoid(m->begin);
4003 free_hoid(m->end);
4004 return ret;
4005 }
4006
4007 return 0;
4008
4009e_inval:
4010 return -EINVAL;
4011}
4012
4013static struct ceph_msg *create_backoff_message(
4014 const struct ceph_osd_backoff *backoff,
4015 u32 map_epoch)
4016{
4017 struct ceph_msg *msg;
4018 void *p, *end;
4019 int msg_size;
4020
4021 msg_size = CEPH_ENCODING_START_BLK_LEN +
4022 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4023 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4024 msg_size += CEPH_ENCODING_START_BLK_LEN +
4025 hoid_encoding_size(backoff->begin);
4026 msg_size += CEPH_ENCODING_START_BLK_LEN +
4027 hoid_encoding_size(backoff->end);
4028
4029 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4030 if (!msg)
4031 return NULL;
4032
4033 p = msg->front.iov_base;
4034 end = p + msg->front_alloc_len;
4035
4036 encode_spgid(&p, &backoff->spgid);
4037 ceph_encode_32(&p, map_epoch);
4038 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4039 ceph_encode_64(&p, backoff->id);
4040 encode_hoid(&p, end, backoff->begin);
4041 encode_hoid(&p, end, backoff->end);
4042 BUG_ON(p != end);
4043
4044 msg->front.iov_len = p - msg->front.iov_base;
4045 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4046 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4047
4048 return msg;
4049}
4050
4051static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4052{
4053 struct ceph_spg_mapping *spg;
4054 struct ceph_osd_backoff *backoff;
4055 struct ceph_msg *msg;
4056
4057 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4058 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4059
4060 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4061 if (!spg) {
4062 spg = alloc_spg_mapping();
4063 if (!spg) {
4064 pr_err("%s failed to allocate spg\n", __func__);
4065 return;
4066 }
4067 spg->spgid = m->spgid; /* struct */
4068 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4069 }
4070
4071 backoff = alloc_backoff();
4072 if (!backoff) {
4073 pr_err("%s failed to allocate backoff\n", __func__);
4074 return;
4075 }
4076 backoff->spgid = m->spgid; /* struct */
4077 backoff->id = m->id;
4078 backoff->begin = m->begin;
4079 m->begin = NULL; /* backoff now owns this */
4080 backoff->end = m->end;
4081 m->end = NULL; /* ditto */
4082
4083 insert_backoff(&spg->backoffs, backoff);
4084 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4085
4086 /*
4087 * Ack with original backoff's epoch so that the OSD can
4088 * discard this if there was a PG split.
4089 */
4090 msg = create_backoff_message(backoff, m->map_epoch);
4091 if (!msg) {
4092 pr_err("%s failed to allocate msg\n", __func__);
4093 return;
4094 }
4095 ceph_con_send(&osd->o_con, msg);
4096}
4097
4098static bool target_contained_by(const struct ceph_osd_request_target *t,
4099 const struct ceph_hobject_id *begin,
4100 const struct ceph_hobject_id *end)
4101{
4102 struct ceph_hobject_id hoid;
4103 int cmp;
4104
4105 hoid_fill_from_target(&hoid, t);
4106 cmp = hoid_compare(&hoid, begin);
4107 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4108}
4109
4110static void handle_backoff_unblock(struct ceph_osd *osd,
4111 const struct MOSDBackoff *m)
4112{
4113 struct ceph_spg_mapping *spg;
4114 struct ceph_osd_backoff *backoff;
4115 struct rb_node *n;
4116
4117 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4118 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4119
4120 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4121 if (!backoff) {
4122 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4123 __func__, osd->o_osd, m->spgid.pgid.pool,
4124 m->spgid.pgid.seed, m->spgid.shard, m->id);
4125 return;
4126 }
4127
4128 if (hoid_compare(backoff->begin, m->begin) &&
4129 hoid_compare(backoff->end, m->end)) {
4130 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4131 __func__, osd->o_osd, m->spgid.pgid.pool,
4132 m->spgid.pgid.seed, m->spgid.shard, m->id);
4133 /* unblock it anyway... */
4134 }
4135
4136 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4137 BUG_ON(!spg);
4138
4139 erase_backoff(&spg->backoffs, backoff);
4140 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4141 free_backoff(backoff);
4142
4143 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4144 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4145 free_spg_mapping(spg);
4146 }
4147
4148 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4149 struct ceph_osd_request *req =
4150 rb_entry(n, struct ceph_osd_request, r_node);
4151
4152 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4153 /*
4154 * Match against @m, not @backoff -- the PG may
4155 * have split on the OSD.
4156 */
4157 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4158 /*
4159 * If no other installed backoff applies,
4160 * resend.
4161 */
4162 send_request(req);
4163 }
4164 }
4165 }
4166}
4167
4168static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4169{
4170 struct ceph_osd_client *osdc = osd->o_osdc;
4171 struct MOSDBackoff m;
4172 int ret;
4173
4174 down_read(&osdc->lock);
4175 if (!osd_registered(osd)) {
4176 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4177 up_read(&osdc->lock);
4178 return;
4179 }
4180 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4181
4182 mutex_lock(&osd->lock);
4183 ret = decode_MOSDBackoff(msg, &m);
4184 if (ret) {
4185 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4186 ceph_msg_dump(msg);
4187 goto out_unlock;
4188 }
4189
4190 switch (m.op) {
4191 case CEPH_OSD_BACKOFF_OP_BLOCK:
4192 handle_backoff_block(osd, &m);
4193 break;
4194 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4195 handle_backoff_unblock(osd, &m);
4196 break;
4197 default:
4198 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4199 }
4200
4201 free_hoid(m.begin);
4202 free_hoid(m.end);
4203
4204out_unlock:
4205 mutex_unlock(&osd->lock);
4206 up_read(&osdc->lock);
4207}
4208
a40c4f10
YS		 4209/*
4210 * Process osd watch notifications
4211 */
3c663bbd
AE		 4212static void handle_watch_notify(struct ceph_osd_client *osdc,
4213 struct ceph_msg *msg)
a40c4f10 4214{
922dab61
ID		 4215 void *p = msg->front.iov_base;
4216 void *const end = p + msg->front.iov_len;
4217 struct ceph_osd_linger_request *lreq;
4218 struct linger_work *lwork;
4219 u8 proto_ver, opcode;
4220 u64 cookie, notify_id;
4221 u64 notifier_id = 0;
19079203 4222 s32 return_code = 0;
922dab61
ID		 4223 void *payload = NULL;
4224 u32 payload_len = 0;
a40c4f10
YS		 4225
4226 ceph_decode_8_safe(&p, end, proto_ver, bad);
4227 ceph_decode_8_safe(&p, end, opcode, bad);
4228 ceph_decode_64_safe(&p, end, cookie, bad);
922dab61 4229 p += 8; /* skip ver */
a40c4f10
YS		 4230 ceph_decode_64_safe(&p, end, notify_id, bad);
4231
922dab61
ID		 4232 if (proto_ver >= 1) {
4233 ceph_decode_32_safe(&p, end, payload_len, bad);
4234 ceph_decode_need(&p, end, payload_len, bad);
4235 payload = p;
4236 p += payload_len;
4237 }
4238
4239 if (le16_to_cpu(msg->hdr.version) >= 2)
19079203 4240 ceph_decode_32_safe(&p, end, return_code, bad);
922dab61
ID		 4241
4242 if (le16_to_cpu(msg->hdr.version) >= 3)
4243 ceph_decode_64_safe(&p, end, notifier_id, bad);
4244
4245 down_read(&osdc->lock);
4246 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4247 if (!lreq) {
4248 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4249 cookie);
4250 goto out_unlock_osdc;
4251 }
4252
4253 mutex_lock(&lreq->lock);
19079203
ID		 4254 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4255 opcode, cookie, lreq, lreq->is_watch);
922dab61
ID		 4256 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4257 if (!lreq->last_error) {
4258 lreq->last_error = -ENOTCONN;
4259 queue_watch_error(lreq);
4260 }
19079203
ID		 4261 } else if (!lreq->is_watch) {
4262 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4263 if (lreq->notify_id && lreq->notify_id != notify_id) {
4264 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4265 lreq->notify_id, notify_id);
4266 } else if (!completion_done(&lreq->notify_finish_wait)) {
4267 struct ceph_msg_data *data =
4268 list_first_entry_or_null(&msg->data,
4269 struct ceph_msg_data,
4270 links);
4271
4272 if (data) {
4273 if (lreq->preply_pages) {
4274 WARN_ON(data->type !=
4275 CEPH_MSG_DATA_PAGES);
4276 *lreq->preply_pages = data->pages;
4277 *lreq->preply_len = data->length;
4278 } else {
4279 ceph_release_page_vector(data->pages,
4280 calc_pages_for(0, data->length));
4281 }
4282 }
4283 lreq->notify_finish_error = return_code;
4284 complete_all(&lreq->notify_finish_wait);
4285 }
922dab61
ID		 4286 } else {
4287 /* CEPH_WATCH_EVENT_NOTIFY */
4288 lwork = lwork_alloc(lreq, do_watch_notify);
4289 if (!lwork) {
4290 pr_err("failed to allocate notify-lwork\n");
4291 goto out_unlock_lreq;
a40c4f10 4292 }
a40c4f10 4293
922dab61
ID		 4294 lwork->notify.notify_id = notify_id;
4295 lwork->notify.notifier_id = notifier_id;
4296 lwork->notify.payload = payload;
4297 lwork->notify.payload_len = payload_len;
4298 lwork->notify.msg = ceph_msg_get(msg);
4299 lwork_queue(lwork);
91883cd2 4300 }
a40c4f10 4301
922dab61
ID		 4302out_unlock_lreq:
4303 mutex_unlock(&lreq->lock);
4304out_unlock_osdc:
4305 up_read(&osdc->lock);
a40c4f10
YS		 4306 return;
4307
4308bad:
4309 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 4310}
4311
70636773
AE		 4312/*
4313 * Register request, send initial attempt.
4314 */
4315int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4316 struct ceph_osd_request *req,
4317 bool nofail)
4318{
5aea3dcd
ID		 4319 down_read(&osdc->lock);
4320 submit_request(req, false);
4321 up_read(&osdc->lock);
0bbfdfe8 4322
5aea3dcd 4323 return 0;
f24e9980 4324}
3d14c5d2 4325EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 4326
c9f9b93d 4327/*
c297eb42
ID		 4328 * Unregister a registered request. The request is not completed:
4329 * ->r_result isn't set and __complete_request() isn't called.
c9f9b93d
ID		 4330 */
4331void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4332{
4333 struct ceph_osd_client *osdc = req->r_osdc;
4334
5aea3dcd 4335 down_write(&osdc->lock);
5aea3dcd
ID		 4336 if (req->r_osd)
4337 cancel_request(req);
4338 up_write(&osdc->lock);
c9f9b93d
ID		 4339}
4340EXPORT_SYMBOL(ceph_osdc_cancel_request);
4341
f24e9980 4342/*
42b06965 4343 * @timeout: in jiffies, 0 means "wait forever"
f24e9980 4344 */
42b06965
ID		 4345static int wait_request_timeout(struct ceph_osd_request *req,
4346 unsigned long timeout)
f24e9980 4347{
42b06965 4348 long left;
c9f9b93d 4349
42b06965 4350 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
0e76abf2 4351 left = wait_for_completion_killable_timeout(&req->r_completion,
42b06965
ID		 4352 ceph_timeout_jiffies(timeout));
4353 if (left <= 0) {
4354 left = left ?: -ETIMEDOUT;
c9f9b93d 4355 ceph_osdc_cancel_request(req);
42b06965
ID		 4356 } else {
4357 left = req->r_result; /* completed */
f24e9980
SW		 4358 }
4359
42b06965
ID		 4360 return left;
4361}
4362
4363/*
4364 * wait for a request to complete
4365 */
4366int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4367 struct ceph_osd_request *req)
4368{
4369 return wait_request_timeout(req, 0);
f24e9980 4370}
3d14c5d2 4371EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 4372
4373/*
4374 * sync - wait for all in-flight requests to flush. avoid starvation.
4375 */
4376void ceph_osdc_sync(struct ceph_osd_client *osdc)
4377{
5aea3dcd
ID		 4378 struct rb_node *n, *p;
4379 u64 last_tid = atomic64_read(&osdc->last_tid);
f24e9980 4380
5aea3dcd
ID		 4381again:
4382 down_read(&osdc->lock);
4383 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4384 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4385
4386 mutex_lock(&osd->lock);
4387 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4388 struct ceph_osd_request *req =
4389 rb_entry(p, struct ceph_osd_request, r_node);
4390
4391 if (req->r_tid > last_tid)
4392 break;
4393
4394 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4395 continue;
f24e9980 4396
5aea3dcd
ID		 4397 ceph_osdc_get_request(req);
4398 mutex_unlock(&osd->lock);
4399 up_read(&osdc->lock);
4400 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4401 __func__, req, req->r_tid, last_tid);
b18b9550 4402 wait_for_completion(&req->r_completion);
5aea3dcd
ID		 4403 ceph_osdc_put_request(req);
4404 goto again;
4405 }
f24e9980 4406
5aea3dcd 4407 mutex_unlock(&osd->lock);
f24e9980 4408 }
5aea3dcd
ID		 4409
4410 up_read(&osdc->lock);
4411 dout("%s done last_tid %llu\n", __func__, last_tid);
f24e9980 4412}
3d14c5d2 4413EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 4414
922dab61
ID		 4415static struct ceph_osd_request *
4416alloc_linger_request(struct ceph_osd_linger_request *lreq)
4417{
4418 struct ceph_osd_request *req;
4419
4420 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4421 if (!req)
4422 return NULL;
4423
4424 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4425 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4426
4427 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4428 ceph_osdc_put_request(req);
4429 return NULL;
4430 }
4431
4432 return req;
4433}
4434
4435/*
4436 * Returns a handle, caller owns a ref.
4437 */
4438struct ceph_osd_linger_request *
4439ceph_osdc_watch(struct ceph_osd_client *osdc,
4440 struct ceph_object_id *oid,
4441 struct ceph_object_locator *oloc,
4442 rados_watchcb2_t wcb,
4443 rados_watcherrcb_t errcb,
4444 void *data)
4445{
4446 struct ceph_osd_linger_request *lreq;
4447 int ret;
4448
4449 lreq = linger_alloc(osdc);
4450 if (!lreq)
4451 return ERR_PTR(-ENOMEM);
4452
19079203 4453 lreq->is_watch = true;
922dab61
ID		 4454 lreq->wcb = wcb;
4455 lreq->errcb = errcb;
4456 lreq->data = data;
b07d3c4b 4457 lreq->watch_valid_thru = jiffies;
922dab61
ID		 4458
4459 ceph_oid_copy(&lreq->t.base_oid, oid);
4460 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
54ea0046 4461 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
1134e091 4462 ktime_get_real_ts(&lreq->mtime);
922dab61
ID		 4463
4464 lreq->reg_req = alloc_linger_request(lreq);
4465 if (!lreq->reg_req) {
4466 ret = -ENOMEM;
4467 goto err_put_lreq;
4468 }
4469
4470 lreq->ping_req = alloc_linger_request(lreq);
4471 if (!lreq->ping_req) {
4472 ret = -ENOMEM;
4473 goto err_put_lreq;
4474 }
4475
4476 down_write(&osdc->lock);
4477 linger_register(lreq); /* before osd_req_op_* */
4478 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
4479 CEPH_OSD_WATCH_OP_WATCH);
4480 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
4481 CEPH_OSD_WATCH_OP_PING);
4482 linger_submit(lreq);
4483 up_write(&osdc->lock);
4484
4485 ret = linger_reg_commit_wait(lreq);
4486 if (ret) {
4487 linger_cancel(lreq);
4488 goto err_put_lreq;
4489 }
4490
4491 return lreq;
4492
4493err_put_lreq:
4494 linger_put(lreq);
4495 return ERR_PTR(ret);
4496}
4497EXPORT_SYMBOL(ceph_osdc_watch);
4498
4499/*
4500 * Releases a ref.
4501 *
4502 * Times out after mount_timeout to preserve rbd unmap behaviour
4503 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4504 * with mount_timeout").
4505 */
4506int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4507 struct ceph_osd_linger_request *lreq)
4508{
4509 struct ceph_options *opts = osdc->client->options;
4510 struct ceph_osd_request *req;
4511 int ret;
4512
4513 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4514 if (!req)
4515 return -ENOMEM;
4516
4517 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4518 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
54ea0046 4519 req->r_flags = CEPH_OSD_FLAG_WRITE;
1134e091 4520 ktime_get_real_ts(&req->r_mtime);
922dab61
ID		 4521 osd_req_op_watch_init(req, 0, lreq->linger_id,
4522 CEPH_OSD_WATCH_OP_UNWATCH);
4523
4524 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4525 if (ret)
4526 goto out_put_req;
4527
4528 ceph_osdc_start_request(osdc, req, false);
4529 linger_cancel(lreq);
4530 linger_put(lreq);
4531 ret = wait_request_timeout(req, opts->mount_timeout);
4532
4533out_put_req:
4534 ceph_osdc_put_request(req);
4535 return ret;
4536}
4537EXPORT_SYMBOL(ceph_osdc_unwatch);
4538
4539static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4540 u64 notify_id, u64 cookie, void *payload,
4541 size_t payload_len)
4542{
4543 struct ceph_osd_req_op *op;
4544 struct ceph_pagelist *pl;
4545 int ret;
4546
4547 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4548
4549 pl = kmalloc(sizeof(*pl), GFP_NOIO);
4550 if (!pl)
4551 return -ENOMEM;
4552
4553 ceph_pagelist_init(pl);
4554 ret = ceph_pagelist_encode_64(pl, notify_id);
4555 ret |= ceph_pagelist_encode_64(pl, cookie);
4556 if (payload) {
4557 ret |= ceph_pagelist_encode_32(pl, payload_len);
4558 ret |= ceph_pagelist_append(pl, payload, payload_len);
4559 } else {
4560 ret |= ceph_pagelist_encode_32(pl, 0);
4561 }
4562 if (ret) {
4563 ceph_pagelist_release(pl);
4564 return -ENOMEM;
4565 }
4566
4567 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4568 op->indata_len = pl->length;
4569 return 0;
4570}
4571
4572int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4573 struct ceph_object_id *oid,
4574 struct ceph_object_locator *oloc,
4575 u64 notify_id,
4576 u64 cookie,
4577 void *payload,
4578 size_t payload_len)
4579{
4580 struct ceph_osd_request *req;
4581 int ret;
4582
4583 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4584 if (!req)
4585 return -ENOMEM;
4586
4587 ceph_oid_copy(&req->r_base_oid, oid);
4588 ceph_oloc_copy(&req->r_base_oloc, oloc);
4589 req->r_flags = CEPH_OSD_FLAG_READ;
4590
4591 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4592 if (ret)
4593 goto out_put_req;
4594
4595 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4596 payload_len);
4597 if (ret)
4598 goto out_put_req;
4599
4600 ceph_osdc_start_request(osdc, req, false);
4601 ret = ceph_osdc_wait_request(osdc, req);
4602
4603out_put_req:
4604 ceph_osdc_put_request(req);
4605 return ret;
4606}
4607EXPORT_SYMBOL(ceph_osdc_notify_ack);
4608
19079203
ID		 4609static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4610 u64 cookie, u32 prot_ver, u32 timeout,
4611 void *payload, size_t payload_len)
4612{
4613 struct ceph_osd_req_op *op;
4614 struct ceph_pagelist *pl;
4615 int ret;
4616
4617 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4618 op->notify.cookie = cookie;
4619
4620 pl = kmalloc(sizeof(*pl), GFP_NOIO);
4621 if (!pl)
4622 return -ENOMEM;
4623
4624 ceph_pagelist_init(pl);
4625 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4626 ret |= ceph_pagelist_encode_32(pl, timeout);
4627 ret |= ceph_pagelist_encode_32(pl, payload_len);
4628 ret |= ceph_pagelist_append(pl, payload, payload_len);
4629 if (ret) {
4630 ceph_pagelist_release(pl);
4631 return -ENOMEM;
4632 }
4633
4634 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4635 op->indata_len = pl->length;
4636 return 0;
4637}
4638
4639/*
4640 * @timeout: in seconds
4641 *
4642 * @preply_{pages,len} are initialized both on success and error.
4643 * The caller is responsible for:
4644 *
4645 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4646 */
4647int ceph_osdc_notify(struct ceph_osd_client *osdc,
4648 struct ceph_object_id *oid,
4649 struct ceph_object_locator *oloc,
4650 void *payload,
4651 size_t payload_len,
4652 u32 timeout,
4653 struct page ***preply_pages,
4654 size_t *preply_len)
4655{
4656 struct ceph_osd_linger_request *lreq;
4657 struct page **pages;
4658 int ret;
4659
4660 WARN_ON(!timeout);
4661 if (preply_pages) {
4662 *preply_pages = NULL;
4663 *preply_len = 0;
4664 }
4665
4666 lreq = linger_alloc(osdc);
4667 if (!lreq)
4668 return -ENOMEM;
4669
4670 lreq->preply_pages = preply_pages;
4671 lreq->preply_len = preply_len;
4672
4673 ceph_oid_copy(&lreq->t.base_oid, oid);
4674 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4675 lreq->t.flags = CEPH_OSD_FLAG_READ;
4676
4677 lreq->reg_req = alloc_linger_request(lreq);
4678 if (!lreq->reg_req) {
4679 ret = -ENOMEM;
4680 goto out_put_lreq;
4681 }
4682
4683 /* for notify_id */
4684 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4685 if (IS_ERR(pages)) {
4686 ret = PTR_ERR(pages);
4687 goto out_put_lreq;
4688 }
4689
4690 down_write(&osdc->lock);
4691 linger_register(lreq); /* before osd_req_op_* */
4692 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
4693 timeout, payload, payload_len);
4694 if (ret) {
4695 linger_unregister(lreq);
4696 up_write(&osdc->lock);
4697 ceph_release_page_vector(pages, 1);
4698 goto out_put_lreq;
4699 }
4700 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4701 response_data),
4702 pages, PAGE_SIZE, 0, false, true);
4703 linger_submit(lreq);
4704 up_write(&osdc->lock);
4705
4706 ret = linger_reg_commit_wait(lreq);
4707 if (!ret)
4708 ret = linger_notify_finish_wait(lreq);
4709 else
4710 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4711
4712 linger_cancel(lreq);
4713out_put_lreq:
4714 linger_put(lreq);
4715 return ret;
4716}
4717EXPORT_SYMBOL(ceph_osdc_notify);
4718
b07d3c4b
ID		 4719/*
4720 * Return the number of milliseconds since the watch was last
4721 * confirmed, or an error. If there is an error, the watch is no
4722 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4723 */
4724int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4725 struct ceph_osd_linger_request *lreq)
4726{
4727 unsigned long stamp, age;
4728 int ret;
4729
4730 down_read(&osdc->lock);
4731 mutex_lock(&lreq->lock);
4732 stamp = lreq->watch_valid_thru;
4733 if (!list_empty(&lreq->pending_lworks)) {
4734 struct linger_work *lwork =
4735 list_first_entry(&lreq->pending_lworks,
4736 struct linger_work,
4737 pending_item);
4738
4739 if (time_before(lwork->queued_stamp, stamp))
4740 stamp = lwork->queued_stamp;
4741 }
4742 age = jiffies - stamp;
4743 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4744 lreq, lreq->linger_id, age, lreq->last_error);
4745 /* we are truncating to msecs, so return a safe upper bound */
4746 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4747
4748 mutex_unlock(&lreq->lock);
4749 up_read(&osdc->lock);
4750 return ret;
4751}
4752
a4ed38d7
DF		 4753static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4754{
4755 u8 struct_v;
4756 u32 struct_len;
4757 int ret;
4758
4759 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4760 &struct_v, &struct_len);
4761 if (ret)
4762 return ret;
4763
4764 ceph_decode_copy(p, &item->name, sizeof(item->name));
4765 item->cookie = ceph_decode_64(p);
4766 *p += 4; /* skip timeout_seconds */
4767 if (struct_v >= 2) {
4768 ceph_decode_copy(p, &item->addr, sizeof(item->addr));
4769 ceph_decode_addr(&item->addr);
4770 }
4771
4772 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4773 ENTITY_NAME(item->name), item->cookie,
4774 ceph_pr_addr(&item->addr.in_addr));
4775 return 0;
4776}
4777
4778static int decode_watchers(void **p, void *end,
4779 struct ceph_watch_item **watchers,
4780 u32 *num_watchers)
4781{
4782 u8 struct_v;
4783 u32 struct_len;
4784 int i;
4785 int ret;
4786
4787 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4788 &struct_v, &struct_len);
4789 if (ret)
4790 return ret;
4791
4792 *num_watchers = ceph_decode_32(p);
4793 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4794 if (!*watchers)
4795 return -ENOMEM;
4796
4797 for (i = 0; i < *num_watchers; i++) {
4798 ret = decode_watcher(p, end, *watchers + i);
4799 if (ret) {
4800 kfree(*watchers);
4801 return ret;
4802 }
4803 }
4804
4805 return 0;
4806}
4807
4808/*
4809 * On success, the caller is responsible for:
4810 *
4811 * kfree(watchers);
4812 */
4813int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
4814 struct ceph_object_id *oid,
4815 struct ceph_object_locator *oloc,
4816 struct ceph_watch_item **watchers,
4817 u32 *num_watchers)
4818{
4819 struct ceph_osd_request *req;
4820 struct page **pages;
4821 int ret;
4822
4823 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4824 if (!req)
4825 return -ENOMEM;
4826
4827 ceph_oid_copy(&req->r_base_oid, oid);
4828 ceph_oloc_copy(&req->r_base_oloc, oloc);
4829 req->r_flags = CEPH_OSD_FLAG_READ;
4830
4831 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4832 if (ret)
4833 goto out_put_req;
4834
4835 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4836 if (IS_ERR(pages)) {
4837 ret = PTR_ERR(pages);
4838 goto out_put_req;
4839 }
4840
4841 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
4842 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
4843 response_data),
4844 pages, PAGE_SIZE, 0, false, true);
4845
4846 ceph_osdc_start_request(osdc, req, false);
4847 ret = ceph_osdc_wait_request(osdc, req);
4848 if (ret >= 0) {
4849 void *p = page_address(pages[0]);
4850 void *const end = p + req->r_ops[0].outdata_len;
4851
4852 ret = decode_watchers(&p, end, watchers, num_watchers);
4853 }
4854
4855out_put_req:
4856 ceph_osdc_put_request(req);
4857 return ret;
4858}
4859EXPORT_SYMBOL(ceph_osdc_list_watchers);
4860
dd935f44
JD		 4861/*
4862 * Call all pending notify callbacks - for use after a watch is
4863 * unregistered, to make sure no more callbacks for it will be invoked
4864 */
f6479449 4865void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44 4866{
99d16943 4867 dout("%s osdc %p\n", __func__, osdc);
dd935f44
JD		 4868 flush_workqueue(osdc->notify_wq);
4869}
4870EXPORT_SYMBOL(ceph_osdc_flush_notifies);
4871
7cca78c9
ID		 4872void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
4873{
4874 down_read(&osdc->lock);
4875 maybe_request_map(osdc);
4876 up_read(&osdc->lock);
4877}
4878EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
dd935f44 4879
428a7158
DF		 4880/*
4881 * Execute an OSD class method on an object.
4882 *
4883 * @flags: CEPH_OSD_FLAG_*
2544a020 4884 * @resp_len: in/out param for reply length
428a7158
DF		 4885 */
4886int ceph_osdc_call(struct ceph_osd_client *osdc,
4887 struct ceph_object_id *oid,
4888 struct ceph_object_locator *oloc,
4889 const char *class, const char *method,
4890 unsigned int flags,
4891 struct page *req_page, size_t req_len,
4892 struct page *resp_page, size_t *resp_len)
4893{
4894 struct ceph_osd_request *req;
4895 int ret;
4896
2544a020
ID		 4897 if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE))
4898 return -E2BIG;
4899
428a7158
DF		 4900 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4901 if (!req)
4902 return -ENOMEM;
4903
4904 ceph_oid_copy(&req->r_base_oid, oid);
4905 ceph_oloc_copy(&req->r_base_oloc, oloc);
4906 req->r_flags = flags;
4907
4908 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4909 if (ret)
4910 goto out_put_req;
4911
4912 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
4913 if (req_page)
4914 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
4915 0, false, false);
4916 if (resp_page)
4917 osd_req_op_cls_response_data_pages(req, 0, &resp_page,
2544a020 4918 *resp_len, 0, false, false);
428a7158
DF		 4919
4920 ceph_osdc_start_request(osdc, req, false);
4921 ret = ceph_osdc_wait_request(osdc, req);
4922 if (ret >= 0) {
4923 ret = req->r_ops[0].rval;
4924 if (resp_page)
4925 *resp_len = req->r_ops[0].outdata_len;
4926 }
4927
4928out_put_req:
4929 ceph_osdc_put_request(req);
4930 return ret;
4931}
4932EXPORT_SYMBOL(ceph_osdc_call);
4933
f24e9980
SW		 4934/*
4935 * init, shutdown
4936 */
4937int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
4938{
4939 int err;
4940
4941 dout("init\n");
4942 osdc->client = client;
5aea3dcd 4943 init_rwsem(&osdc->lock);
f24e9980 4944 osdc->osds = RB_ROOT;
f5a2041b 4945 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 4946 spin_lock_init(&osdc->osd_lru_lock);
5aea3dcd
ID		 4947 osd_init(&osdc->homeless_osd);
4948 osdc->homeless_osd.o_osdc = osdc;
4949 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
264048af 4950 osdc->last_linger_id = CEPH_LINGER_ID_START;
922dab61 4951 osdc->linger_requests = RB_ROOT;
4609245e
ID		 4952 osdc->map_checks = RB_ROOT;
4953 osdc->linger_map_checks = RB_ROOT;
f24e9980 4954 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b
YS		 4955 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
4956
5f44f142 4957 err = -ENOMEM;
e5253a7b
ID		 4958 osdc->osdmap = ceph_osdmap_alloc();
4959 if (!osdc->osdmap)
4960 goto out;
4961
9e767adb
ID		 4962 osdc->req_mempool = mempool_create_slab_pool(10,
4963 ceph_osd_request_cache);
f24e9980 4964 if (!osdc->req_mempool)
e5253a7b 4965 goto out_map;
f24e9980 4966
d50b409f 4967 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
711da55d 4968 PAGE_SIZE, 10, true, "osd_op");
f24e9980 4969 if (err < 0)
5f44f142 4970 goto out_mempool;
d50b409f 4971 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
711da55d 4972 PAGE_SIZE, 10, true, "osd_op_reply");
c16e7869
SW		 4973 if (err < 0)
4974 goto out_msgpool;
a40c4f10 4975
dbcae088 4976 err = -ENOMEM;
a40c4f10 4977 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 4978 if (!osdc->notify_wq)
c172ec5c
ID		 4979 goto out_msgpool_reply;
4980
fbca9635
ID		 4981 schedule_delayed_work(&osdc->timeout_work,
4982 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 4983 schedule_delayed_work(&osdc->osds_timeout_work,
4984 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
4985
f24e9980 4986 return 0;
5f44f142 4987
c172ec5c
ID		 4988out_msgpool_reply:
4989 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 4990out_msgpool:
4991 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 4992out_mempool:
4993 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 4994out_map:
4995 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 4996out:
4997 return err;
f24e9980
SW		 4998}
4999
5000void ceph_osdc_stop(struct ceph_osd_client *osdc)
5001{
a40c4f10
YS		 5002 flush_workqueue(osdc->notify_wq);
5003 destroy_workqueue(osdc->notify_wq);
f24e9980 5004 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 5005 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f 5006
5aea3dcd 5007 down_write(&osdc->lock);
42a2c09f
ID		 5008 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5009 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5010 struct ceph_osd, o_node);
5aea3dcd 5011 close_osd(osd);
42a2c09f 5012 }
5aea3dcd 5013 up_write(&osdc->lock);
02113a0f 5014 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5aea3dcd
ID		 5015 osd_cleanup(&osdc->homeless_osd);
5016
5017 WARN_ON(!list_empty(&osdc->osd_lru));
922dab61 5018 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4609245e
ID		 5019 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5020 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5aea3dcd
ID		 5021 WARN_ON(atomic_read(&osdc->num_requests));
5022 WARN_ON(atomic_read(&osdc->num_homeless));
42a2c09f 5023
e5253a7b 5024 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 5025 mempool_destroy(osdc->req_mempool);
5026 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 5027 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 5028}
5029
5030/*
5031 * Read some contiguous pages. If we cross a stripe boundary, shorten
5032 * *plen. Return number of bytes read, or error.
5033 */
5034int ceph_osdc_readpages(struct ceph_osd_client *osdc,
5035 struct ceph_vino vino, struct ceph_file_layout *layout,
5036 u64 off, u64 *plen,
5037 u32 truncate_seq, u64 truncate_size,
b7495fc2 5038 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 5039{
5040 struct ceph_osd_request *req;
5041 int rc = 0;
5042
5043 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
5044 vino.snap, off, *plen);
715e4cd4 5045 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 5046 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 5047 NULL, truncate_seq, truncate_size,
153e5167 5048 false);
6816282d
SW		 5049 if (IS_ERR(req))
5050 return PTR_ERR(req);
f24e9980
SW		 5051
5052 /* it may be a short read due to an object boundary */
406e2c9f 5053 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 5054 pages, *plen, page_align, false, false);
f24e9980 5055
e0c59487 5056 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 5057 off, *plen, *plen, page_align);
f24e9980
SW		 5058
5059 rc = ceph_osdc_start_request(osdc, req, false);
5060 if (!rc)
5061 rc = ceph_osdc_wait_request(osdc, req);
5062
5063 ceph_osdc_put_request(req);
5064 dout("readpages result %d\n", rc);
5065 return rc;
5066}
3d14c5d2 5067EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 5068
5069/*
5070 * do a synchronous write on N pages
5071 */
5072int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
5073 struct ceph_file_layout *layout,
5074 struct ceph_snap_context *snapc,
5075 u64 off, u64 len,
5076 u32 truncate_seq, u64 truncate_size,
5077 struct timespec *mtime,
24808826 5078 struct page **pages, int num_pages)
f24e9980
SW		 5079{
5080 struct ceph_osd_request *req;
5081 int rc = 0;
b7495fc2 5082 int page_align = off & ~PAGE_MASK;
f24e9980 5083
715e4cd4 5084 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
54ea0046 5085 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
acead002 5086 snapc, truncate_seq, truncate_size,
153e5167 5087 true);
6816282d
SW		 5088 if (IS_ERR(req))
5089 return PTR_ERR(req);
f24e9980
SW		 5090
5091 /* it may be a short write due to an object boundary */
406e2c9f 5092 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 5093 false, false);
5094 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 5095
bb873b53 5096 req->r_mtime = *mtime;
87f979d3 5097 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 5098 if (!rc)
5099 rc = ceph_osdc_wait_request(osdc, req);
5100
5101 ceph_osdc_put_request(req);
5102 if (rc == 0)
5103 rc = len;
5104 dout("writepages result %d\n", rc);
5105 return rc;
5106}
3d14c5d2 5107EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 5108
5522ae0b
AE		 5109int ceph_osdc_setup(void)
5110{
3f1af42a
ID		 5111 size_t size = sizeof(struct ceph_osd_request) +
5112 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5113
5522ae0b 5114 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 5115 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5116 0, 0, NULL);
5522ae0b
AE		 5117
5118 return ceph_osd_request_cache ? 0 : -ENOMEM;
5119}
5120EXPORT_SYMBOL(ceph_osdc_setup);
5121
5122void ceph_osdc_cleanup(void)
5123{
5124 BUG_ON(!ceph_osd_request_cache);
5125 kmem_cache_destroy(ceph_osd_request_cache);
5126 ceph_osd_request_cache = NULL;
5127}
5128EXPORT_SYMBOL(ceph_osdc_cleanup);
5129
f24e9980
SW		 5130/*
5131 * handle incoming message
5132 */
5133static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5134{
5135 struct ceph_osd *osd = con->private;
5aea3dcd 5136 struct ceph_osd_client *osdc = osd->o_osdc;
f24e9980
SW		 5137 int type = le16_to_cpu(msg->hdr.type);
5138
f24e9980
SW		 5139 switch (type) {
5140 case CEPH_MSG_OSD_MAP:
5141 ceph_osdc_handle_map(osdc, msg);
5142 break;
5143 case CEPH_MSG_OSD_OPREPLY:
5aea3dcd 5144 handle_reply(osd, msg);
f24e9980 5145 break;
a02a946d
ID		 5146 case CEPH_MSG_OSD_BACKOFF:
5147 handle_backoff(osd, msg);
5148 break;
a40c4f10
YS		 5149 case CEPH_MSG_WATCH_NOTIFY:
5150 handle_watch_notify(osdc, msg);
5151 break;
f24e9980
SW		 5152
5153 default:
5154 pr_err("received unknown message type %d %s\n", type,
5155 ceph_msg_type_name(type));
5156 }
5aea3dcd 5157
f24e9980
SW		 5158 ceph_msg_put(msg);
5159}
5160
5b3a4db3 5161/*
d15f9d69
ID		 5162 * Lookup and return message for incoming reply. Don't try to do
5163 * anything about a larger than preallocated data portion of the
5164 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 5165 */
5166static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 5167 struct ceph_msg_header *hdr,
5168 int *skip)
f24e9980
SW		 5169{
5170 struct ceph_osd *osd = con->private;
5171 struct ceph_osd_client *osdc = osd->o_osdc;
5aea3dcd 5172 struct ceph_msg *m = NULL;
0547a9b3 5173 struct ceph_osd_request *req;
3f0a4ac5 5174 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 5175 int data_len = le32_to_cpu(hdr->data_len);
5aea3dcd 5176 u64 tid = le64_to_cpu(hdr->tid);
f24e9980 5177
5aea3dcd
ID		 5178 down_read(&osdc->lock);
5179 if (!osd_registered(osd)) {
5180 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5181 *skip = 1;
5182 goto out_unlock_osdc;
5183 }
5184 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5185
5186 mutex_lock(&osd->lock);
5187 req = lookup_request(&osd->o_requests, tid);
0547a9b3 5188 if (!req) {
cd8140c6
ID		 5189 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5190 osd->o_osd, tid);
d15f9d69 5191 *skip = 1;
5aea3dcd 5192 goto out_unlock_session;
0547a9b3 5193 }
c16e7869 5194
ace6d3a9 5195 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 5196
f2be82b0 5197 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 5198 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5199 __func__, osd->o_osd, req->r_tid, front_len,
5200 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 5201 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5202 false);
a79832f2 5203 if (!m)
5aea3dcd 5204 goto out_unlock_session;
c16e7869
SW		 5205 ceph_msg_put(req->r_reply);
5206 req->r_reply = m;
5207 }
0fff87ec 5208
d15f9d69
ID		 5209 if (data_len > req->r_reply->data_length) {
5210 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5211 __func__, osd->o_osd, req->r_tid, data_len,
5212 req->r_reply->data_length);
5213 m = NULL;
5214 *skip = 1;
5aea3dcd 5215 goto out_unlock_session;
0547a9b3 5216 }
d15f9d69
ID		 5217
5218 m = ceph_msg_get(req->r_reply);
c16e7869 5219 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3 5220
5aea3dcd
ID		 5221out_unlock_session:
5222 mutex_unlock(&osd->lock);
5223out_unlock_osdc:
5224 up_read(&osdc->lock);
2450418c 5225 return m;
5b3a4db3
SW		 5226}
5227
19079203
ID		 5228/*
5229 * TODO: switch to a msg-owned pagelist
5230 */
5231static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5232{
5233 struct ceph_msg *m;
5234 int type = le16_to_cpu(hdr->type);
5235 u32 front_len = le32_to_cpu(hdr->front_len);
5236 u32 data_len = le32_to_cpu(hdr->data_len);
5237
5238 m = ceph_msg_new(type, front_len, GFP_NOIO, false);
5239 if (!m)
5240 return NULL;
5241
5242 if (data_len) {
5243 struct page **pages;
5244 struct ceph_osd_data osd_data;
5245
5246 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5247 GFP_NOIO);
c22e853a 5248 if (IS_ERR(pages)) {
19079203
ID		 5249 ceph_msg_put(m);
5250 return NULL;
5251 }
5252
5253 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
5254 false);
5255 ceph_osdc_msg_data_add(m, &osd_data);
5256 }
5257
5258 return m;
5259}
5260
5b3a4db3
SW		 5261static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5262 struct ceph_msg_header *hdr,
5263 int *skip)
5264{
5265 struct ceph_osd *osd = con->private;
5266 int type = le16_to_cpu(hdr->type);
5b3a4db3 5267
1c20f2d2 5268 *skip = 0;
5b3a4db3
SW		 5269 switch (type) {
5270 case CEPH_MSG_OSD_MAP:
a02a946d 5271 case CEPH_MSG_OSD_BACKOFF:
a40c4f10 5272 case CEPH_MSG_WATCH_NOTIFY:
19079203 5273 return alloc_msg_with_page_vector(hdr);
5b3a4db3
SW		 5274 case CEPH_MSG_OSD_OPREPLY:
5275 return get_reply(con, hdr, skip);
5276 default:
5aea3dcd
ID		 5277 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5278 osd->o_osd, type);
5b3a4db3
SW		 5279 *skip = 1;
5280 return NULL;
5281 }
f24e9980
SW		 5282}
5283
5284/*
5285 * Wrappers to refcount containing ceph_osd struct
5286 */
5287static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5288{
5289 struct ceph_osd *osd = con->private;
5290 if (get_osd(osd))
5291 return con;
5292 return NULL;
5293}
5294
5295static void put_osd_con(struct ceph_connection *con)
5296{
5297 struct ceph_osd *osd = con->private;
5298 put_osd(osd);
5299}
5300
4e7a5dcd
SW		 5301/*
5302 * authentication
5303 */
a3530df3
AE		 5304/*
5305 * Note: returned pointer is the address of a structure that's
5306 * managed separately. Caller must *not* attempt to free it.
5307 */
5308static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 5309 int *proto, int force_new)
4e7a5dcd
SW		 5310{
5311 struct ceph_osd *o = con->private;
5312 struct ceph_osd_client *osdc = o->o_osdc;
5313 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 5314 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 5315
74f1869f 5316 if (force_new && auth->authorizer) {
6c1ea260 5317 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 5318 auth->authorizer = NULL;
5319 }
27859f97
SW		 5320 if (!auth->authorizer) {
5321 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5322 auth);
4e7a5dcd 5323 if (ret)
a3530df3 5324 return ERR_PTR(ret);
27859f97
SW		 5325 } else {
5326 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 5327 auth);
5328 if (ret)
5329 return ERR_PTR(ret);
4e7a5dcd 5330 }
4e7a5dcd 5331 *proto = ac->protocol;
74f1869f 5332
a3530df3 5333 return auth;
4e7a5dcd
SW		 5334}
5335
5336
0dde5848 5337static int verify_authorizer_reply(struct ceph_connection *con)
4e7a5dcd
SW		 5338{
5339 struct ceph_osd *o = con->private;
5340 struct ceph_osd_client *osdc = o->o_osdc;
5341 struct ceph_auth_client *ac = osdc->client->monc.auth;
5342
0dde5848 5343 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
4e7a5dcd
SW		 5344}
5345
9bd2e6f8
SW		 5346static int invalidate_authorizer(struct ceph_connection *con)
5347{
5348 struct ceph_osd *o = con->private;
5349 struct ceph_osd_client *osdc = o->o_osdc;
5350 struct ceph_auth_client *ac = osdc->client->monc.auth;
5351
27859f97 5352 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 5353 return ceph_monc_validate_auth(&osdc->client->monc);
5354}
4e7a5dcd 5355
8cb441c0
ID		 5356static void osd_reencode_message(struct ceph_msg *msg)
5357{
914902af
ID		 5358 int type = le16_to_cpu(msg->hdr.type);
5359
5360 if (type == CEPH_MSG_OSD_OP)
5361 encode_request_finish(msg);
8cb441c0
ID		 5362}
5363
79dbd1ba 5364static int osd_sign_message(struct ceph_msg *msg)
33d07337 5365{
79dbd1ba 5366 struct ceph_osd *o = msg->con->private;
33d07337 5367 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5368
33d07337
YZ		 5369 return ceph_auth_sign_message(auth, msg);
5370}
5371
79dbd1ba 5372static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 5373{
79dbd1ba 5374 struct ceph_osd *o = msg->con->private;
33d07337 5375 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5376
33d07337
YZ		 5377 return ceph_auth_check_message_signature(auth, msg);
5378}
5379
9e32789f 5380static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 5381 .get = get_osd_con,
5382 .put = put_osd_con,
5383 .dispatch = dispatch,
4e7a5dcd
SW		 5384 .get_authorizer = get_authorizer,
5385 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 5386 .invalidate_authorizer = invalidate_authorizer,
f24e9980 5387 .alloc_msg = alloc_msg,
8cb441c0 5388 .reencode_message = osd_reencode_message,
79dbd1ba
ID		 5389 .sign_message = osd_sign_message,
5390 .check_message_signature = osd_check_message_signature,
5aea3dcd 5391 .fault = osd_fault,
f24e9980 5392};
Linux 6.x block layer and io_uring tree(s)