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License cleanup: add SPDX GPL-2.0 license identifier to files with no license
[mirror_ubuntu-bionic-kernel.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>
f24e9980 23
c16e7869 24#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 25
5522ae0b
AE		 26static struct kmem_cache *ceph_osd_request_cache;
27
9e32789f 28static const struct ceph_connection_operations osd_con_ops;
f24e9980 29
f24e9980
SW		 30/*
31 * Implement client access to distributed object storage cluster.
32 *
33 * All data objects are stored within a cluster/cloud of OSDs, or
34 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
35 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
36 * remote daemons serving up and coordinating consistent and safe
37 * access to storage.
38 *
39 * Cluster membership and the mapping of data objects onto storage devices
40 * are described by the osd map.
41 *
42 * We keep track of pending OSD requests (read, write), resubmit
43 * requests to different OSDs when the cluster topology/data layout
44 * change, or retry the affected requests when the communications
45 * channel with an OSD is reset.
46 */
47
5aea3dcd
ID		 48static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
49static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
922dab61
ID		 50static void link_linger(struct ceph_osd *osd,
51 struct ceph_osd_linger_request *lreq);
52static void unlink_linger(struct ceph_osd *osd,
53 struct ceph_osd_linger_request *lreq);
a02a946d 54static void clear_backoffs(struct ceph_osd *osd);
5aea3dcd
ID		 55
56#if 1
57static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
58{
59 bool wrlocked = true;
60
61 if (unlikely(down_read_trylock(sem))) {
62 wrlocked = false;
63 up_read(sem);
64 }
65
66 return wrlocked;
67}
68static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
69{
70 WARN_ON(!rwsem_is_locked(&osdc->lock));
71}
72static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
73{
74 WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
75}
76static inline void verify_osd_locked(struct ceph_osd *osd)
77{
78 struct ceph_osd_client *osdc = osd->o_osdc;
79
80 WARN_ON(!(mutex_is_locked(&osd->lock) &&
81 rwsem_is_locked(&osdc->lock)) &&
82 !rwsem_is_wrlocked(&osdc->lock));
83}
922dab61
ID		 84static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
85{
86 WARN_ON(!mutex_is_locked(&lreq->lock));
87}
5aea3dcd
ID		 88#else
89static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
90static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
91static inline void verify_osd_locked(struct ceph_osd *osd) { }
922dab61 92static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
5aea3dcd
ID		 93#endif
94
f24e9980
SW		 95/*
96 * calculate the mapping of a file extent onto an object, and fill out the
97 * request accordingly. shorten extent as necessary if it crosses an
98 * object boundary.
99 *
100 * fill osd op in request message.
101 */
dbe0fc41 102static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 103 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 104{
60e56f13 105 u64 orig_len = *plen;
d63b77f4 106 int r;
f24e9980 107
60e56f13 108 /* object extent? */
75d1c941
AE		 109 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
110 objoff, objlen);
d63b77f4
SW		 111 if (r < 0)
112 return r;
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);
f24e9980 120
3ff5f385 121 return 0;
f24e9980
SW		 122}
123
c54d47bf
AE		 124static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
125{
126 memset(osd_data, 0, sizeof (*osd_data));
127 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
128}
129
a4ce40a9 130static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 131 struct page **pages, u64 length, u32 alignment,
132 bool pages_from_pool, bool own_pages)
133{
134 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
135 osd_data->pages = pages;
136 osd_data->length = length;
137 osd_data->alignment = alignment;
138 osd_data->pages_from_pool = pages_from_pool;
139 osd_data->own_pages = own_pages;
140}
43bfe5de 141
a4ce40a9 142static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 143 struct ceph_pagelist *pagelist)
144{
145 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
146 osd_data->pagelist = pagelist;
147}
43bfe5de
AE		 148
149#ifdef CONFIG_BLOCK
a4ce40a9 150static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 151 struct bio *bio, size_t bio_length)
152{
153 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
154 osd_data->bio = bio;
155 osd_data->bio_length = bio_length;
156}
43bfe5de
AE		 157#endif /* CONFIG_BLOCK */
158
8a703a38
IC		 159#define osd_req_op_data(oreq, whch, typ, fld) \
160({ \
161 struct ceph_osd_request *__oreq = (oreq); \
162 unsigned int __whch = (whch); \
163 BUG_ON(__whch >= __oreq->r_num_ops); \
164 &__oreq->r_ops[__whch].typ.fld; \
165})
863c7eb5 166
49719778
AE		 167static struct ceph_osd_data *
168osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
169{
170 BUG_ON(which >= osd_req->r_num_ops);
171
172 return &osd_req->r_ops[which].raw_data_in;
173}
174
a4ce40a9
AE		 175struct ceph_osd_data *
176osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 177 unsigned int which)
a4ce40a9 178{
863c7eb5 179 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 180}
181EXPORT_SYMBOL(osd_req_op_extent_osd_data);
182
49719778
AE		 183void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
184 unsigned int which, struct page **pages,
185 u64 length, u32 alignment,
186 bool pages_from_pool, bool own_pages)
187{
188 struct ceph_osd_data *osd_data;
189
190 osd_data = osd_req_op_raw_data_in(osd_req, which);
191 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
192 pages_from_pool, own_pages);
193}
194EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
195
a4ce40a9 196void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 197 unsigned int which, struct page **pages,
198 u64 length, u32 alignment,
a4ce40a9
AE		 199 bool pages_from_pool, bool own_pages)
200{
201 struct ceph_osd_data *osd_data;
202
863c7eb5 203 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 204 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
205 pages_from_pool, own_pages);
a4ce40a9
AE		 206}
207EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
208
209void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 210 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 211{
212 struct ceph_osd_data *osd_data;
213
863c7eb5 214 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 215 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 216}
217EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
218
219#ifdef CONFIG_BLOCK
220void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 221 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 222{
223 struct ceph_osd_data *osd_data;
863c7eb5
AE		 224
225 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 226 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 227}
228EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
229#endif /* CONFIG_BLOCK */
230
231static void osd_req_op_cls_request_info_pagelist(
232 struct ceph_osd_request *osd_req,
233 unsigned int which, struct ceph_pagelist *pagelist)
234{
235 struct ceph_osd_data *osd_data;
236
863c7eb5 237 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 238 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 239}
240
04017e29
AE		 241void osd_req_op_cls_request_data_pagelist(
242 struct ceph_osd_request *osd_req,
243 unsigned int which, struct ceph_pagelist *pagelist)
244{
245 struct ceph_osd_data *osd_data;
246
863c7eb5 247 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29 248 ceph_osd_data_pagelist_init(osd_data, pagelist);
bb873b53
ID		 249 osd_req->r_ops[which].cls.indata_len += pagelist->length;
250 osd_req->r_ops[which].indata_len += pagelist->length;
04017e29
AE		 251}
252EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
253
6c57b554
AE		 254void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
255 unsigned int which, struct page **pages, u64 length,
256 u32 alignment, bool pages_from_pool, bool own_pages)
257{
258 struct ceph_osd_data *osd_data;
259
260 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
261 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
262 pages_from_pool, own_pages);
bb873b53
ID		 263 osd_req->r_ops[which].cls.indata_len += length;
264 osd_req->r_ops[which].indata_len += length;
6c57b554
AE		 265}
266EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
267
a4ce40a9
AE		 268void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
269 unsigned int which, struct page **pages, u64 length,
270 u32 alignment, bool pages_from_pool, bool own_pages)
271{
272 struct ceph_osd_data *osd_data;
273
863c7eb5 274 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 275 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
276 pages_from_pool, own_pages);
a4ce40a9
AE		 277}
278EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
279
23c08a9c
AE		 280static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
281{
282 switch (osd_data->type) {
283 case CEPH_OSD_DATA_TYPE_NONE:
284 return 0;
285 case CEPH_OSD_DATA_TYPE_PAGES:
286 return osd_data->length;
287 case CEPH_OSD_DATA_TYPE_PAGELIST:
288 return (u64)osd_data->pagelist->length;
289#ifdef CONFIG_BLOCK
290 case CEPH_OSD_DATA_TYPE_BIO:
291 return (u64)osd_data->bio_length;
292#endif /* CONFIG_BLOCK */
293 default:
294 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
295 return 0;
296 }
297}
298
c54d47bf
AE		 299static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
300{
5476492f 301 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 302 int num_pages;
303
304 num_pages = calc_pages_for((u64)osd_data->alignment,
305 (u64)osd_data->length);
306 ceph_release_page_vector(osd_data->pages, num_pages);
307 }
5476492f
AE		 308 ceph_osd_data_init(osd_data);
309}
310
311static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
312 unsigned int which)
313{
314 struct ceph_osd_req_op *op;
315
316 BUG_ON(which >= osd_req->r_num_ops);
317 op = &osd_req->r_ops[which];
318
319 switch (op->op) {
320 case CEPH_OSD_OP_READ:
321 case CEPH_OSD_OP_WRITE:
e30b7577 322 case CEPH_OSD_OP_WRITEFULL:
5476492f
AE		 323 ceph_osd_data_release(&op->extent.osd_data);
324 break;
325 case CEPH_OSD_OP_CALL:
326 ceph_osd_data_release(&op->cls.request_info);
04017e29 327 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 328 ceph_osd_data_release(&op->cls.response_data);
329 break;
d74b50be
YZ		 330 case CEPH_OSD_OP_SETXATTR:
331 case CEPH_OSD_OP_CMPXATTR:
332 ceph_osd_data_release(&op->xattr.osd_data);
333 break;
66ba609f
YZ		 334 case CEPH_OSD_OP_STAT:
335 ceph_osd_data_release(&op->raw_data_in);
336 break;
922dab61
ID		 337 case CEPH_OSD_OP_NOTIFY_ACK:
338 ceph_osd_data_release(&op->notify_ack.request_data);
339 break;
19079203
ID		 340 case CEPH_OSD_OP_NOTIFY:
341 ceph_osd_data_release(&op->notify.request_data);
342 ceph_osd_data_release(&op->notify.response_data);
343 break;
a4ed38d7
DF		 344 case CEPH_OSD_OP_LIST_WATCHERS:
345 ceph_osd_data_release(&op->list_watchers.response_data);
346 break;
5476492f
AE		 347 default:
348 break;
349 }
c54d47bf
AE		 350}
351
63244fa1
ID		 352/*
353 * Assumes @t is zero-initialized.
354 */
355static void target_init(struct ceph_osd_request_target *t)
356{
357 ceph_oid_init(&t->base_oid);
358 ceph_oloc_init(&t->base_oloc);
359 ceph_oid_init(&t->target_oid);
360 ceph_oloc_init(&t->target_oloc);
361
362 ceph_osds_init(&t->acting);
363 ceph_osds_init(&t->up);
364 t->size = -1;
365 t->min_size = -1;
366
367 t->osd = CEPH_HOMELESS_OSD;
368}
369
922dab61
ID		 370static void target_copy(struct ceph_osd_request_target *dest,
371 const struct ceph_osd_request_target *src)
372{
373 ceph_oid_copy(&dest->base_oid, &src->base_oid);
374 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
375 ceph_oid_copy(&dest->target_oid, &src->target_oid);
376 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
377
378 dest->pgid = src->pgid; /* struct */
dc98ff72 379 dest->spgid = src->spgid; /* struct */
922dab61
ID		 380 dest->pg_num = src->pg_num;
381 dest->pg_num_mask = src->pg_num_mask;
382 ceph_osds_copy(&dest->acting, &src->acting);
383 ceph_osds_copy(&dest->up, &src->up);
384 dest->size = src->size;
385 dest->min_size = src->min_size;
386 dest->sort_bitwise = src->sort_bitwise;
387
388 dest->flags = src->flags;
389 dest->paused = src->paused;
390
04c7d789 391 dest->epoch = src->epoch;
dc93e0e2
ID		 392 dest->last_force_resend = src->last_force_resend;
393
922dab61
ID		 394 dest->osd = src->osd;
395}
396
63244fa1
ID		 397static void target_destroy(struct ceph_osd_request_target *t)
398{
399 ceph_oid_destroy(&t->base_oid);
30c156d9 400 ceph_oloc_destroy(&t->base_oloc);
63244fa1 401 ceph_oid_destroy(&t->target_oid);
30c156d9 402 ceph_oloc_destroy(&t->target_oloc);
63244fa1
ID		 403}
404
f24e9980
SW		 405/*
406 * requests
407 */
3540bfdb
ID		 408static void request_release_checks(struct ceph_osd_request *req)
409{
410 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
4609245e 411 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
3540bfdb
ID		 412 WARN_ON(!list_empty(&req->r_unsafe_item));
413 WARN_ON(req->r_osd);
414}
415
9e94af20 416static void ceph_osdc_release_request(struct kref *kref)
f24e9980 417{
9e94af20
ID		 418 struct ceph_osd_request *req = container_of(kref,
419 struct ceph_osd_request, r_kref);
5476492f 420 unsigned int which;
415e49a9 421
9e94af20
ID		 422 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
423 req->r_request, req->r_reply);
3540bfdb 424 request_release_checks(req);
9e94af20 425
415e49a9
SW		 426 if (req->r_request)
427 ceph_msg_put(req->r_request);
5aea3dcd 428 if (req->r_reply)
ab8cb34a 429 ceph_msg_put(req->r_reply);
0fff87ec 430
5476492f
AE		 431 for (which = 0; which < req->r_num_ops; which++)
432 osd_req_op_data_release(req, which);
0fff87ec 433
a66dd383 434 target_destroy(&req->r_t);
415e49a9 435 ceph_put_snap_context(req->r_snapc);
d30291b9 436
415e49a9
SW		 437 if (req->r_mempool)
438 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 439 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 440 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 441 else
442 kfree(req);
f24e9980 443}
9e94af20
ID		 444
445void ceph_osdc_get_request(struct ceph_osd_request *req)
446{
447 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 448 kref_read(&req->r_kref));
9e94af20
ID		 449 kref_get(&req->r_kref);
450}
451EXPORT_SYMBOL(ceph_osdc_get_request);
452
453void ceph_osdc_put_request(struct ceph_osd_request *req)
454{
3ed97d63
ID		 455 if (req) {
456 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 457 kref_read(&req->r_kref));
3ed97d63
ID		 458 kref_put(&req->r_kref, ceph_osdc_release_request);
459 }
9e94af20
ID		 460}
461EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 462
3540bfdb
ID		 463static void request_init(struct ceph_osd_request *req)
464{
465 /* req only, each op is zeroed in _osd_req_op_init() */
466 memset(req, 0, sizeof(*req));
467
468 kref_init(&req->r_kref);
469 init_completion(&req->r_completion);
3540bfdb 470 RB_CLEAR_NODE(&req->r_node);
4609245e 471 RB_CLEAR_NODE(&req->r_mc_node);
3540bfdb
ID		 472 INIT_LIST_HEAD(&req->r_unsafe_item);
473
474 target_init(&req->r_t);
475}
476
922dab61
ID		 477/*
478 * This is ugly, but it allows us to reuse linger registration and ping
479 * requests, keeping the structure of the code around send_linger{_ping}()
480 * reasonable. Setting up a min_nr=2 mempool for each linger request
481 * and dealing with copying ops (this blasts req only, watch op remains
482 * intact) isn't any better.
483 */
484static void request_reinit(struct ceph_osd_request *req)
485{
486 struct ceph_osd_client *osdc = req->r_osdc;
487 bool mempool = req->r_mempool;
488 unsigned int num_ops = req->r_num_ops;
489 u64 snapid = req->r_snapid;
490 struct ceph_snap_context *snapc = req->r_snapc;
491 bool linger = req->r_linger;
492 struct ceph_msg *request_msg = req->r_request;
493 struct ceph_msg *reply_msg = req->r_reply;
494
495 dout("%s req %p\n", __func__, req);
2c935bc5 496 WARN_ON(kref_read(&req->r_kref) != 1);
922dab61
ID		 497 request_release_checks(req);
498
2c935bc5
PZ		 499 WARN_ON(kref_read(&request_msg->kref) != 1);
500 WARN_ON(kref_read(&reply_msg->kref) != 1);
922dab61
ID		 501 target_destroy(&req->r_t);
502
503 request_init(req);
504 req->r_osdc = osdc;
505 req->r_mempool = mempool;
506 req->r_num_ops = num_ops;
507 req->r_snapid = snapid;
508 req->r_snapc = snapc;
509 req->r_linger = linger;
510 req->r_request = request_msg;
511 req->r_reply = reply_msg;
512}
513
3499e8a5 514struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 515 struct ceph_snap_context *snapc,
1b83bef2 516 unsigned int num_ops,
3499e8a5 517 bool use_mempool,
54a54007 518 gfp_t gfp_flags)
f24e9980
SW		 519{
520 struct ceph_osd_request *req;
1b83bef2 521
f24e9980 522 if (use_mempool) {
3f1af42a 523 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 524 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 525 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
526 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 527 } else {
3f1af42a
ID		 528 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
529 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
530 gfp_flags);
f24e9980 531 }
3f1af42a 532 if (unlikely(!req))
a79832f2 533 return NULL;
f24e9980 534
3540bfdb 535 request_init(req);
f24e9980
SW		 536 req->r_osdc = osdc;
537 req->r_mempool = use_mempool;
79528734 538 req->r_num_ops = num_ops;
84127282
ID		 539 req->r_snapid = CEPH_NOSNAP;
540 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 541
13d1ad16
ID		 542 dout("%s req %p\n", __func__, req);
543 return req;
544}
545EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 546
2e59ffd1 547static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
30c156d9
YZ		 548{
549 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
550}
551
13d1ad16
ID		 552int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
553{
554 struct ceph_osd_client *osdc = req->r_osdc;
555 struct ceph_msg *msg;
556 int msg_size;
c16e7869 557
d30291b9 558 WARN_ON(ceph_oid_empty(&req->r_base_oid));
30c156d9 559 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
d30291b9 560
13d1ad16 561 /* create request message */
8cb441c0
ID		 562 msg_size = CEPH_ENCODING_START_BLK_LEN +
563 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
564 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
565 msg_size += CEPH_ENCODING_START_BLK_LEN +
566 sizeof(struct ceph_osd_reqid); /* reqid */
567 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
568 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
30c156d9
YZ		 569 msg_size += CEPH_ENCODING_START_BLK_LEN +
570 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
13d1ad16
ID		 571 msg_size += 4 + req->r_base_oid.name_len; /* oid */
572 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 573 msg_size += 8; /* snapid */
574 msg_size += 8; /* snap_seq */
13d1ad16 575 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
8cb441c0 576 msg_size += 4 + 8; /* retry_attempt, features */
ae458f5a 577
13d1ad16 578 if (req->r_mempool)
8f3bc053 579 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 580 else
13d1ad16
ID		 581 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
582 if (!msg)
583 return -ENOMEM;
68b4476b 584
f24e9980 585 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 586 req->r_request = msg;
3499e8a5 587
13d1ad16
ID		 588 /* create reply message */
589 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 590 msg_size += req->r_base_oid.name_len;
591 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 592
593 if (req->r_mempool)
594 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
595 else
596 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
597 if (!msg)
598 return -ENOMEM;
599
600 req->r_reply = msg;
601
602 return 0;
3499e8a5 603}
13d1ad16 604EXPORT_SYMBOL(ceph_osdc_alloc_messages);
3499e8a5 605
a8dd0a37 606static bool osd_req_opcode_valid(u16 opcode)
68b4476b 607{
a8dd0a37 608 switch (opcode) {
70b5bfa3
ID		 609#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
610__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
611#undef GENERATE_CASE
a8dd0a37
AE		 612 default:
613 return false;
614 }
615}
616
33803f33
AE		 617/*
618 * This is an osd op init function for opcodes that have no data or
619 * other information associated with them. It also serves as a
620 * common init routine for all the other init functions, below.
621 */
c99d2d4a 622static struct ceph_osd_req_op *
49719778 623_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 624 u16 opcode, u32 flags)
33803f33 625{
c99d2d4a
AE		 626 struct ceph_osd_req_op *op;
627
628 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 629 BUG_ON(!osd_req_opcode_valid(opcode));
630
c99d2d4a 631 op = &osd_req->r_ops[which];
33803f33 632 memset(op, 0, sizeof (*op));
33803f33 633 op->op = opcode;
144cba14 634 op->flags = flags;
c99d2d4a
AE		 635
636 return op;
33803f33
AE		 637}
638
49719778 639void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 640 unsigned int which, u16 opcode, u32 flags)
49719778 641{
144cba14 642 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 643}
644EXPORT_SYMBOL(osd_req_op_init);
645
c99d2d4a
AE		 646void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
647 unsigned int which, u16 opcode,
33803f33
AE		 648 u64 offset, u64 length,
649 u64 truncate_size, u32 truncate_seq)
650{
144cba14
YZ		 651 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
652 opcode, 0);
33803f33
AE		 653 size_t payload_len = 0;
654
ad7a60de 655 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 656 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
657 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 658
33803f33
AE		 659 op->extent.offset = offset;
660 op->extent.length = length;
661 op->extent.truncate_size = truncate_size;
662 op->extent.truncate_seq = truncate_seq;
e30b7577 663 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 664 payload_len += length;
665
de2aa102 666 op->indata_len = payload_len;
33803f33
AE		 667}
668EXPORT_SYMBOL(osd_req_op_extent_init);
669
c99d2d4a
AE		 670void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
671 unsigned int which, u64 length)
e5975c7c 672{
c99d2d4a
AE		 673 struct ceph_osd_req_op *op;
674 u64 previous;
675
676 BUG_ON(which >= osd_req->r_num_ops);
677 op = &osd_req->r_ops[which];
678 previous = op->extent.length;
e5975c7c
AE		 679
680 if (length == previous)
681 return; /* Nothing to do */
682 BUG_ON(length > previous);
683
684 op->extent.length = length;
d641df81
YZ		 685 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
686 op->indata_len -= previous - length;
e5975c7c
AE		 687}
688EXPORT_SYMBOL(osd_req_op_extent_update);
689
2c63f49a
YZ		 690void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
691 unsigned int which, u64 offset_inc)
692{
693 struct ceph_osd_req_op *op, *prev_op;
694
695 BUG_ON(which + 1 >= osd_req->r_num_ops);
696
697 prev_op = &osd_req->r_ops[which];
698 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
699 /* dup previous one */
700 op->indata_len = prev_op->indata_len;
701 op->outdata_len = prev_op->outdata_len;
702 op->extent = prev_op->extent;
703 /* adjust offset */
704 op->extent.offset += offset_inc;
705 op->extent.length -= offset_inc;
706
707 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
708 op->indata_len -= offset_inc;
709}
710EXPORT_SYMBOL(osd_req_op_extent_dup_last);
711
c99d2d4a 712void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 713 u16 opcode, const char *class, const char *method)
33803f33 714{
144cba14
YZ		 715 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
716 opcode, 0);
5f562df5 717 struct ceph_pagelist *pagelist;
33803f33
AE		 718 size_t payload_len = 0;
719 size_t size;
720
721 BUG_ON(opcode != CEPH_OSD_OP_CALL);
722
5f562df5
AE		 723 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
724 BUG_ON(!pagelist);
725 ceph_pagelist_init(pagelist);
726
33803f33
AE		 727 op->cls.class_name = class;
728 size = strlen(class);
729 BUG_ON(size > (size_t) U8_MAX);
730 op->cls.class_len = size;
5f562df5 731 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 732 payload_len += size;
733
734 op->cls.method_name = method;
735 size = strlen(method);
736 BUG_ON(size > (size_t) U8_MAX);
737 op->cls.method_len = size;
5f562df5 738 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 739 payload_len += size;
740
a4ce40a9 741 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 742
de2aa102 743 op->indata_len = payload_len;
33803f33
AE		 744}
745EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 746
d74b50be
YZ		 747int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
748 u16 opcode, const char *name, const void *value,
749 size_t size, u8 cmp_op, u8 cmp_mode)
750{
144cba14
YZ		 751 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
752 opcode, 0);
d74b50be
YZ		 753 struct ceph_pagelist *pagelist;
754 size_t payload_len;
755
756 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
757
758 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
759 if (!pagelist)
760 return -ENOMEM;
761
762 ceph_pagelist_init(pagelist);
763
764 payload_len = strlen(name);
765 op->xattr.name_len = payload_len;
766 ceph_pagelist_append(pagelist, name, payload_len);
767
768 op->xattr.value_len = size;
769 ceph_pagelist_append(pagelist, value, size);
770 payload_len += size;
771
772 op->xattr.cmp_op = cmp_op;
773 op->xattr.cmp_mode = cmp_mode;
774
775 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 776 op->indata_len = payload_len;
d74b50be
YZ		 777 return 0;
778}
779EXPORT_SYMBOL(osd_req_op_xattr_init);
780
922dab61
ID		 781/*
782 * @watch_opcode: CEPH_OSD_WATCH_OP_*
783 */
784static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
785 u64 cookie, u8 watch_opcode)
33803f33 786{
922dab61 787 struct ceph_osd_req_op *op;
33803f33 788
922dab61 789 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
33803f33 790 op->watch.cookie = cookie;
922dab61
ID		 791 op->watch.op = watch_opcode;
792 op->watch.gen = 0;
33803f33 793}
33803f33 794
c647b8a8
ID		 795void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
796 unsigned int which,
797 u64 expected_object_size,
798 u64 expected_write_size)
799{
800 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 801 CEPH_OSD_OP_SETALLOCHINT,
802 0);
c647b8a8
ID		 803
804 op->alloc_hint.expected_object_size = expected_object_size;
805 op->alloc_hint.expected_write_size = expected_write_size;
806
807 /*
808 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
809 * not worth a feature bit. Set FAILOK per-op flag to make
810 * sure older osds don't trip over an unsupported opcode.
811 */
812 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
813}
814EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
815
90af3602 816static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 817 struct ceph_osd_data *osd_data)
818{
819 u64 length = ceph_osd_data_length(osd_data);
820
821 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
822 BUG_ON(length > (u64) SIZE_MAX);
823 if (length)
90af3602 824 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 825 length, osd_data->alignment);
826 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
827 BUG_ON(!length);
90af3602 828 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 829#ifdef CONFIG_BLOCK
830 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 831 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 832#endif
833 } else {
834 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
835 }
836}
837
bb873b53
ID		 838static u32 osd_req_encode_op(struct ceph_osd_op *dst,
839 const struct ceph_osd_req_op *src)
a8dd0a37 840{
a8dd0a37
AE		 841 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
842 pr_err("unrecognized osd opcode %d\n", src->op);
843
844 return 0;
845 }
846
847 switch (src->op) {
848 case CEPH_OSD_OP_STAT:
849 break;
850 case CEPH_OSD_OP_READ:
851 case CEPH_OSD_OP_WRITE:
e30b7577 852 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 853 case CEPH_OSD_OP_ZERO:
ad7a60de 854 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37
AE		 855 dst->extent.offset = cpu_to_le64(src->extent.offset);
856 dst->extent.length = cpu_to_le64(src->extent.length);
857 dst->extent.truncate_size =
858 cpu_to_le64(src->extent.truncate_size);
859 dst->extent.truncate_seq =
860 cpu_to_le32(src->extent.truncate_seq);
861 break;
862 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 863 dst->cls.class_len = src->cls.class_len;
864 dst->cls.method_len = src->cls.method_len;
bb873b53 865 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
a8dd0a37 866 break;
a8dd0a37
AE		 867 case CEPH_OSD_OP_WATCH:
868 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
922dab61
ID		 869 dst->watch.ver = cpu_to_le64(0);
870 dst->watch.op = src->watch.op;
871 dst->watch.gen = cpu_to_le32(src->watch.gen);
872 break;
873 case CEPH_OSD_OP_NOTIFY_ACK:
a8dd0a37 874 break;
19079203
ID		 875 case CEPH_OSD_OP_NOTIFY:
876 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
877 break;
a4ed38d7
DF		 878 case CEPH_OSD_OP_LIST_WATCHERS:
879 break;
c647b8a8
ID		 880 case CEPH_OSD_OP_SETALLOCHINT:
881 dst->alloc_hint.expected_object_size =
882 cpu_to_le64(src->alloc_hint.expected_object_size);
883 dst->alloc_hint.expected_write_size =
884 cpu_to_le64(src->alloc_hint.expected_write_size);
885 break;
d74b50be
YZ		 886 case CEPH_OSD_OP_SETXATTR:
887 case CEPH_OSD_OP_CMPXATTR:
888 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
889 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
890 dst->xattr.cmp_op = src->xattr.cmp_op;
891 dst->xattr.cmp_mode = src->xattr.cmp_mode;
d74b50be 892 break;
864e9197
YZ		 893 case CEPH_OSD_OP_CREATE:
894 case CEPH_OSD_OP_DELETE:
895 break;
a8dd0a37 896 default:
4c46459c 897 pr_err("unsupported osd opcode %s\n",
8f63ca2d 898 ceph_osd_op_name(src->op));
4c46459c 899 WARN_ON(1);
a8dd0a37
AE		 900
901 return 0;
68b4476b 902 }
7b25bf5f 903
a8dd0a37 904 dst->op = cpu_to_le16(src->op);
7b25bf5f 905 dst->flags = cpu_to_le32(src->flags);
de2aa102 906 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 907
bb873b53 908 return src->indata_len;
68b4476b
YS		 909}
910
3499e8a5
YS		 911/*
912 * build new request AND message, calculate layout, and adjust file
913 * extent as needed.
914 *
915 * if the file was recently truncated, we include information about its
916 * old and new size so that the object can be updated appropriately. (we
917 * avoid synchronously deleting truncated objects because it's slow.)
3499e8a5
YS		 918 */
919struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
920 struct ceph_file_layout *layout,
921 struct ceph_vino vino,
715e4cd4
YZ		 922 u64 off, u64 *plen,
923 unsigned int which, int num_ops,
3499e8a5
YS		 924 int opcode, int flags,
925 struct ceph_snap_context *snapc,
3499e8a5
YS		 926 u32 truncate_seq,
927 u64 truncate_size,
153e5167 928 bool use_mempool)
3499e8a5 929{
68b4476b 930 struct ceph_osd_request *req;
75d1c941
AE		 931 u64 objnum = 0;
932 u64 objoff = 0;
933 u64 objlen = 0;
6816282d 934 int r;
68b4476b 935
ad7a60de 936 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 937 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
938 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 939
acead002 940 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 941 GFP_NOFS);
13d1ad16
ID		 942 if (!req) {
943 r = -ENOMEM;
944 goto fail;
945 }
79528734 946
3499e8a5 947 /* calculate max write size */
a19dadfb 948 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 949 if (r)
950 goto fail;
a19dadfb 951
864e9197 952 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 953 osd_req_op_init(req, which, opcode, 0);
864e9197 954 } else {
7627151e 955 u32 object_size = layout->object_size;
864e9197
YZ		 956 u32 object_base = off - objoff;
957 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
958 if (truncate_size <= object_base) {
959 truncate_size = 0;
960 } else {
961 truncate_size -= object_base;
962 if (truncate_size > object_size)
963 truncate_size = object_size;
964 }
ccca4e37 965 }
715e4cd4 966 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 967 truncate_size, truncate_seq);
968 }
d18d1e28 969
a1f4020a 970 req->r_abort_on_full = true;
bb873b53 971 req->r_flags = flags;
7627151e 972 req->r_base_oloc.pool = layout->pool_id;
30c156d9 973 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
d30291b9 974 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
dbe0fc41 975
bb873b53
ID		 976 req->r_snapid = vino.snap;
977 if (flags & CEPH_OSD_FLAG_WRITE)
978 req->r_data_offset = off;
979
13d1ad16
ID		 980 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
981 if (r)
982 goto fail;
983
f24e9980 984 return req;
13d1ad16
ID		 985
986fail:
987 ceph_osdc_put_request(req);
988 return ERR_PTR(r);
f24e9980 989}
3d14c5d2 990EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 991
992/*
993 * We keep osd requests in an rbtree, sorted by ->r_tid.
994 */
fcd00b68 995DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
4609245e 996DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
f24e9980 997
0247a0cf
ID		 998static bool osd_homeless(struct ceph_osd *osd)
999{
1000 return osd->o_osd == CEPH_HOMELESS_OSD;
1001}
1002
5aea3dcd 1003static bool osd_registered(struct ceph_osd *osd)
f24e9980 1004{
5aea3dcd 1005 verify_osdc_locked(osd->o_osdc);
f24e9980 1006
5aea3dcd 1007 return !RB_EMPTY_NODE(&osd->o_node);
f24e9980
SW		 1008}
1009
0247a0cf
ID		 1010/*
1011 * Assumes @osd is zero-initialized.
1012 */
1013static void osd_init(struct ceph_osd *osd)
1014{
02113a0f 1015 refcount_set(&osd->o_ref, 1);
0247a0cf 1016 RB_CLEAR_NODE(&osd->o_node);
5aea3dcd 1017 osd->o_requests = RB_ROOT;
922dab61 1018 osd->o_linger_requests = RB_ROOT;
a02a946d
ID		 1019 osd->o_backoff_mappings = RB_ROOT;
1020 osd->o_backoffs_by_id = RB_ROOT;
0247a0cf
ID		 1021 INIT_LIST_HEAD(&osd->o_osd_lru);
1022 INIT_LIST_HEAD(&osd->o_keepalive_item);
1023 osd->o_incarnation = 1;
5aea3dcd 1024 mutex_init(&osd->lock);
0247a0cf
ID		 1025}
1026
1027static void osd_cleanup(struct ceph_osd *osd)
1028{
1029 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
5aea3dcd 1030 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 1031 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
a02a946d
ID		 1032 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1033 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
0247a0cf
ID		 1034 WARN_ON(!list_empty(&osd->o_osd_lru));
1035 WARN_ON(!list_empty(&osd->o_keepalive_item));
1036
1037 if (osd->o_auth.authorizer) {
1038 WARN_ON(osd_homeless(osd));
1039 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1040 }
1041}
1042
f24e9980
SW		 1043/*
1044 * Track open sessions with osds.
1045 */
e10006f8 1046static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1047{
1048 struct ceph_osd *osd;
1049
0247a0cf
ID		 1050 WARN_ON(onum == CEPH_HOMELESS_OSD);
1051
7a28f59b 1052 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
0247a0cf 1053 osd_init(osd);
f24e9980 1054 osd->o_osdc = osdc;
e10006f8 1055 osd->o_osd = onum;
f24e9980 1056
b7a9e5dd 1057 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1058
f24e9980
SW		 1059 return osd;
1060}
1061
1062static struct ceph_osd *get_osd(struct ceph_osd *osd)
1063{
02113a0f
ER		 1064 if (refcount_inc_not_zero(&osd->o_ref)) {
1065 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1066 refcount_read(&osd->o_ref));
f24e9980
SW		 1067 return osd;
1068 } else {
1069 dout("get_osd %p FAIL\n", osd);
1070 return NULL;
1071 }
1072}
1073
1074static void put_osd(struct ceph_osd *osd)
1075{
02113a0f
ER		 1076 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1077 refcount_read(&osd->o_ref) - 1);
1078 if (refcount_dec_and_test(&osd->o_ref)) {
0247a0cf 1079 osd_cleanup(osd);
f24e9980 1080 kfree(osd);
79494d1b 1081 }
f24e9980
SW		 1082}
1083
fcd00b68
ID		 1084DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1085
9dd2845c 1086static void __move_osd_to_lru(struct ceph_osd *osd)
f5a2041b 1087{
9dd2845c
ID		 1088 struct ceph_osd_client *osdc = osd->o_osdc;
1089
1090 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
f5a2041b 1091 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1092
9dd2845c 1093 spin_lock(&osdc->osd_lru_lock);
f5a2041b 1094 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
9dd2845c
ID		 1095 spin_unlock(&osdc->osd_lru_lock);
1096
a319bf56 1097 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1098}
1099
9dd2845c 1100static void maybe_move_osd_to_lru(struct ceph_osd *osd)
bbf37ec3 1101{
5aea3dcd 1102 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1103 RB_EMPTY_ROOT(&osd->o_linger_requests))
9dd2845c 1104 __move_osd_to_lru(osd);
bbf37ec3
ID		 1105}
1106
f5a2041b
YS		 1107static void __remove_osd_from_lru(struct ceph_osd *osd)
1108{
9dd2845c
ID		 1109 struct ceph_osd_client *osdc = osd->o_osdc;
1110
1111 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1112
1113 spin_lock(&osdc->osd_lru_lock);
f5a2041b
YS		 1114 if (!list_empty(&osd->o_osd_lru))
1115 list_del_init(&osd->o_osd_lru);
9dd2845c 1116 spin_unlock(&osdc->osd_lru_lock);
f5a2041b
YS		 1117}
1118
5aea3dcd
ID		 1119/*
1120 * Close the connection and assign any leftover requests to the
1121 * homeless session.
1122 */
1123static void close_osd(struct ceph_osd *osd)
1124{
1125 struct ceph_osd_client *osdc = osd->o_osdc;
1126 struct rb_node *n;
1127
1128 verify_osdc_wrlocked(osdc);
1129 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1130
1131 ceph_con_close(&osd->o_con);
1132
1133 for (n = rb_first(&osd->o_requests); n; ) {
1134 struct ceph_osd_request *req =
1135 rb_entry(n, struct ceph_osd_request, r_node);
1136
1137 n = rb_next(n); /* unlink_request() */
1138
1139 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1140 unlink_request(osd, req);
1141 link_request(&osdc->homeless_osd, req);
1142 }
922dab61
ID		 1143 for (n = rb_first(&osd->o_linger_requests); n; ) {
1144 struct ceph_osd_linger_request *lreq =
1145 rb_entry(n, struct ceph_osd_linger_request, node);
1146
1147 n = rb_next(n); /* unlink_linger() */
1148
1149 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1150 lreq->linger_id);
1151 unlink_linger(osd, lreq);
1152 link_linger(&osdc->homeless_osd, lreq);
1153 }
a02a946d 1154 clear_backoffs(osd);
5aea3dcd
ID		 1155
1156 __remove_osd_from_lru(osd);
1157 erase_osd(&osdc->osds, osd);
1158 put_osd(osd);
1159}
1160
f24e9980
SW		 1161/*
1162 * reset osd connect
1163 */
5aea3dcd 1164static int reopen_osd(struct ceph_osd *osd)
f24e9980 1165{
c3acb181 1166 struct ceph_entity_addr *peer_addr;
f24e9980 1167
5aea3dcd
ID		 1168 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1169
1170 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1171 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
5aea3dcd 1172 close_osd(osd);
c3acb181
AE		 1173 return -ENODEV;
1174 }
1175
5aea3dcd 1176 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
c3acb181
AE		 1177 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1178 !ceph_con_opened(&osd->o_con)) {
5aea3dcd 1179 struct rb_node *n;
c3acb181 1180
0b4af2e8
ID		 1181 dout("osd addr hasn't changed and connection never opened, "
1182 "letting msgr retry\n");
87b315a5 1183 /* touch each r_stamp for handle_timeout()'s benfit */
5aea3dcd
ID		 1184 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1185 struct ceph_osd_request *req =
1186 rb_entry(n, struct ceph_osd_request, r_node);
87b315a5 1187 req->r_stamp = jiffies;
5aea3dcd 1188 }
c3acb181
AE		 1189
1190 return -EAGAIN;
f24e9980 1191 }
c3acb181
AE		 1192
1193 ceph_con_close(&osd->o_con);
1194 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1195 osd->o_incarnation++;
1196
1197 return 0;
f24e9980
SW		 1198}
1199
5aea3dcd
ID		 1200static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1201 bool wrlocked)
f24e9980 1202{
5aea3dcd 1203 struct ceph_osd *osd;
35f9f8a0 1204
5aea3dcd
ID		 1205 if (wrlocked)
1206 verify_osdc_wrlocked(osdc);
1207 else
1208 verify_osdc_locked(osdc);
f24e9980 1209
5aea3dcd
ID		 1210 if (o != CEPH_HOMELESS_OSD)
1211 osd = lookup_osd(&osdc->osds, o);
1212 else
1213 osd = &osdc->homeless_osd;
1214 if (!osd) {
1215 if (!wrlocked)
1216 return ERR_PTR(-EAGAIN);
0ba6478d 1217
5aea3dcd
ID		 1218 osd = create_osd(osdc, o);
1219 insert_osd(&osdc->osds, osd);
1220 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1221 &osdc->osdmap->osd_addr[osd->o_osd]);
0ba6478d 1222 }
f24e9980 1223
5aea3dcd
ID		 1224 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1225 return osd;
f24e9980
SW		 1226}
1227
1228/*
5aea3dcd
ID		 1229 * Create request <-> OSD session relation.
1230 *
1231 * @req has to be assigned a tid, @osd may be homeless.
f24e9980 1232 */
5aea3dcd 1233static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
f24e9980 1234{
5aea3dcd
ID		 1235 verify_osd_locked(osd);
1236 WARN_ON(!req->r_tid || req->r_osd);
1237 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1238 req, req->r_tid);
1239
1240 if (!osd_homeless(osd))
1241 __remove_osd_from_lru(osd);
1242 else
1243 atomic_inc(&osd->o_osdc->num_homeless);
1244
1245 get_osd(osd);
1246 insert_request(&osd->o_requests, req);
1247 req->r_osd = osd;
f24e9980
SW		 1248}
1249
5aea3dcd
ID		 1250static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1251{
1252 verify_osd_locked(osd);
1253 WARN_ON(req->r_osd != osd);
1254 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1255 req, req->r_tid);
1256
1257 req->r_osd = NULL;
1258 erase_request(&osd->o_requests, req);
1259 put_osd(osd);
1260
1261 if (!osd_homeless(osd))
1262 maybe_move_osd_to_lru(osd);
1263 else
1264 atomic_dec(&osd->o_osdc->num_homeless);
1265}
1266
63244fa1
ID		 1267static bool __pool_full(struct ceph_pg_pool_info *pi)
1268{
1269 return pi->flags & CEPH_POOL_FLAG_FULL;
1270}
1271
42c1b124
ID		 1272static bool have_pool_full(struct ceph_osd_client *osdc)
1273{
1274 struct rb_node *n;
1275
1276 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1277 struct ceph_pg_pool_info *pi =
1278 rb_entry(n, struct ceph_pg_pool_info, node);
1279
1280 if (__pool_full(pi))
1281 return true;
1282 }
1283
1284 return false;
1285}
1286
5aea3dcd
ID		 1287static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1288{
1289 struct ceph_pg_pool_info *pi;
1290
1291 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1292 if (!pi)
1293 return false;
1294
1295 return __pool_full(pi);
1296}
1297
d29adb34
JD		 1298/*
1299 * Returns whether a request should be blocked from being sent
1300 * based on the current osdmap and osd_client settings.
d29adb34 1301 */
63244fa1
ID		 1302static bool target_should_be_paused(struct ceph_osd_client *osdc,
1303 const struct ceph_osd_request_target *t,
1304 struct ceph_pg_pool_info *pi)
1305{
b7ec35b3
ID		 1306 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1307 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1308 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
63244fa1
ID		 1309 __pool_full(pi);
1310
6d637a54 1311 WARN_ON(pi->id != t->target_oloc.pool);
58eb7932
JL		 1312 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1313 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1314 (osdc->osdmap->epoch < osdc->epoch_barrier);
63244fa1
ID		 1315}
1316
63244fa1
ID		 1317enum calc_target_result {
1318 CALC_TARGET_NO_ACTION = 0,
1319 CALC_TARGET_NEED_RESEND,
1320 CALC_TARGET_POOL_DNE,
1321};
1322
1323static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1324 struct ceph_osd_request_target *t,
7de030d6 1325 struct ceph_connection *con,
63244fa1
ID		 1326 bool any_change)
1327{
1328 struct ceph_pg_pool_info *pi;
1329 struct ceph_pg pgid, last_pgid;
1330 struct ceph_osds up, acting;
1331 bool force_resend = false;
84ed45df
ID		 1332 bool unpaused = false;
1333 bool legacy_change;
7de030d6 1334 bool split = false;
b7ec35b3 1335 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
ae78dd81
ID		 1336 bool recovery_deletes = ceph_osdmap_flag(osdc,
1337 CEPH_OSDMAP_RECOVERY_DELETES);
63244fa1
ID		 1338 enum calc_target_result ct_res;
1339 int ret;
1340
04c7d789 1341 t->epoch = osdc->osdmap->epoch;
63244fa1
ID		 1342 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1343 if (!pi) {
1344 t->osd = CEPH_HOMELESS_OSD;
1345 ct_res = CALC_TARGET_POOL_DNE;
1346 goto out;
1347 }
1348
1349 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
dc93e0e2
ID		 1350 if (t->last_force_resend < pi->last_force_request_resend) {
1351 t->last_force_resend = pi->last_force_request_resend;
63244fa1 1352 force_resend = true;
dc93e0e2 1353 } else if (t->last_force_resend == 0) {
63244fa1
ID		 1354 force_resend = true;
1355 }
1356 }
63244fa1 1357
db098ec4
ID		 1358 /* apply tiering */
1359 ceph_oid_copy(&t->target_oid, &t->base_oid);
1360 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1361 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
63244fa1
ID		 1362 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1363 t->target_oloc.pool = pi->read_tier;
1364 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1365 t->target_oloc.pool = pi->write_tier;
6d637a54
ID		 1366
1367 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1368 if (!pi) {
1369 t->osd = CEPH_HOMELESS_OSD;
1370 ct_res = CALC_TARGET_POOL_DNE;
1371 goto out;
1372 }
63244fa1
ID		 1373 }
1374
df28152d
ID		 1375 ret = __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc,
1376 &pgid);
63244fa1
ID		 1377 if (ret) {
1378 WARN_ON(ret != -ENOENT);
1379 t->osd = CEPH_HOMELESS_OSD;
1380 ct_res = CALC_TARGET_POOL_DNE;
1381 goto out;
1382 }
1383 last_pgid.pool = pgid.pool;
1384 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1385
df28152d 1386 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
63244fa1
ID		 1387 if (any_change &&
1388 ceph_is_new_interval(&t->acting,
1389 &acting,
1390 &t->up,
1391 &up,
1392 t->size,
1393 pi->size,
1394 t->min_size,
1395 pi->min_size,
1396 t->pg_num,
1397 pi->pg_num,
1398 t->sort_bitwise,
1399 sort_bitwise,
ae78dd81
ID		 1400 t->recovery_deletes,
1401 recovery_deletes,
63244fa1
ID		 1402 &last_pgid))
1403 force_resend = true;
1404
1405 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1406 t->paused = false;
84ed45df 1407 unpaused = true;
63244fa1 1408 }
84ed45df
ID		 1409 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1410 ceph_osds_changed(&t->acting, &acting, any_change);
7de030d6
ID		 1411 if (t->pg_num)
1412 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
63244fa1 1413
7de030d6 1414 if (legacy_change || force_resend || split) {
63244fa1 1415 t->pgid = pgid; /* struct */
df28152d 1416 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
63244fa1
ID		 1417 ceph_osds_copy(&t->acting, &acting);
1418 ceph_osds_copy(&t->up, &up);
1419 t->size = pi->size;
1420 t->min_size = pi->min_size;
1421 t->pg_num = pi->pg_num;
1422 t->pg_num_mask = pi->pg_num_mask;
1423 t->sort_bitwise = sort_bitwise;
ae78dd81 1424 t->recovery_deletes = recovery_deletes;
63244fa1
ID		 1425
1426 t->osd = acting.primary;
63244fa1
ID		 1427 }
1428
7de030d6
ID		 1429 if (unpaused || legacy_change || force_resend ||
1430 (split && con && CEPH_HAVE_FEATURE(con->peer_features,
1431 RESEND_ON_SPLIT)))
84ed45df
ID		 1432 ct_res = CALC_TARGET_NEED_RESEND;
1433 else
1434 ct_res = CALC_TARGET_NO_ACTION;
1435
63244fa1
ID		 1436out:
1437 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1438 return ct_res;
1439}
1440
a02a946d
ID		 1441static struct ceph_spg_mapping *alloc_spg_mapping(void)
1442{
1443 struct ceph_spg_mapping *spg;
1444
1445 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1446 if (!spg)
1447 return NULL;
1448
1449 RB_CLEAR_NODE(&spg->node);
1450 spg->backoffs = RB_ROOT;
1451 return spg;
1452}
1453
1454static void free_spg_mapping(struct ceph_spg_mapping *spg)
1455{
1456 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1457 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1458
1459 kfree(spg);
1460}
1461
1462/*
1463 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1464 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1465 * defined only within a specific spgid; it does not pass anything to
1466 * children on split, or to another primary.
1467 */
1468DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1469 RB_BYPTR, const struct ceph_spg *, node)
1470
1471static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1472{
1473 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1474}
1475
1476static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1477 void **pkey, size_t *pkey_len)
1478{
1479 if (hoid->key_len) {
1480 *pkey = hoid->key;
1481 *pkey_len = hoid->key_len;
1482 } else {
1483 *pkey = hoid->oid;
1484 *pkey_len = hoid->oid_len;
1485 }
1486}
1487
1488static int compare_names(const void *name1, size_t name1_len,
1489 const void *name2, size_t name2_len)
1490{
1491 int ret;
1492
1493 ret = memcmp(name1, name2, min(name1_len, name2_len));
1494 if (!ret) {
1495 if (name1_len < name2_len)
1496 ret = -1;
1497 else if (name1_len > name2_len)
1498 ret = 1;
1499 }
1500 return ret;
1501}
1502
1503static int hoid_compare(const struct ceph_hobject_id *lhs,
1504 const struct ceph_hobject_id *rhs)
1505{
1506 void *effective_key1, *effective_key2;
1507 size_t effective_key1_len, effective_key2_len;
1508 int ret;
1509
1510 if (lhs->is_max < rhs->is_max)
1511 return -1;
1512 if (lhs->is_max > rhs->is_max)
1513 return 1;
1514
1515 if (lhs->pool < rhs->pool)
1516 return -1;
1517 if (lhs->pool > rhs->pool)
1518 return 1;
1519
1520 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1521 return -1;
1522 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1523 return 1;
1524
1525 ret = compare_names(lhs->nspace, lhs->nspace_len,
1526 rhs->nspace, rhs->nspace_len);
1527 if (ret)
1528 return ret;
1529
1530 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1531 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1532 ret = compare_names(effective_key1, effective_key1_len,
1533 effective_key2, effective_key2_len);
1534 if (ret)
1535 return ret;
1536
1537 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1538 if (ret)
1539 return ret;
1540
1541 if (lhs->snapid < rhs->snapid)
1542 return -1;
1543 if (lhs->snapid > rhs->snapid)
1544 return 1;
1545
1546 return 0;
1547}
1548
1549/*
1550 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1551 * compat stuff here.
1552 *
1553 * Assumes @hoid is zero-initialized.
1554 */
1555static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1556{
1557 u8 struct_v;
1558 u32 struct_len;
1559 int ret;
1560
1561 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1562 &struct_len);
1563 if (ret)
1564 return ret;
1565
1566 if (struct_v < 4) {
1567 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1568 goto e_inval;
1569 }
1570
1571 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1572 GFP_NOIO);
1573 if (IS_ERR(hoid->key)) {
1574 ret = PTR_ERR(hoid->key);
1575 hoid->key = NULL;
1576 return ret;
1577 }
1578
1579 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1580 GFP_NOIO);
1581 if (IS_ERR(hoid->oid)) {
1582 ret = PTR_ERR(hoid->oid);
1583 hoid->oid = NULL;
1584 return ret;
1585 }
1586
1587 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1588 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1589 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1590
1591 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1592 GFP_NOIO);
1593 if (IS_ERR(hoid->nspace)) {
1594 ret = PTR_ERR(hoid->nspace);
1595 hoid->nspace = NULL;
1596 return ret;
1597 }
1598
1599 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1600
1601 ceph_hoid_build_hash_cache(hoid);
1602 return 0;
1603
1604e_inval:
1605 return -EINVAL;
1606}
1607
1608static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1609{
1610 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1611 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1612}
1613
1614static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1615{
1616 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1617 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1618 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1619 ceph_encode_64(p, hoid->snapid);
1620 ceph_encode_32(p, hoid->hash);
1621 ceph_encode_8(p, hoid->is_max);
1622 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1623 ceph_encode_64(p, hoid->pool);
1624}
1625
1626static void free_hoid(struct ceph_hobject_id *hoid)
1627{
1628 if (hoid) {
1629 kfree(hoid->key);
1630 kfree(hoid->oid);
1631 kfree(hoid->nspace);
1632 kfree(hoid);
1633 }
1634}
1635
1636static struct ceph_osd_backoff *alloc_backoff(void)
1637{
1638 struct ceph_osd_backoff *backoff;
1639
1640 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1641 if (!backoff)
1642 return NULL;
1643
1644 RB_CLEAR_NODE(&backoff->spg_node);
1645 RB_CLEAR_NODE(&backoff->id_node);
1646 return backoff;
1647}
1648
1649static void free_backoff(struct ceph_osd_backoff *backoff)
1650{
1651 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1652 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1653
1654 free_hoid(backoff->begin);
1655 free_hoid(backoff->end);
1656 kfree(backoff);
1657}
1658
1659/*
1660 * Within a specific spgid, backoffs are managed by ->begin hoid.
1661 */
1662DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1663 RB_BYVAL, spg_node);
1664
1665static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1666 const struct ceph_hobject_id *hoid)
1667{
1668 struct rb_node *n = root->rb_node;
1669
1670 while (n) {
1671 struct ceph_osd_backoff *cur =
1672 rb_entry(n, struct ceph_osd_backoff, spg_node);
1673 int cmp;
1674
1675 cmp = hoid_compare(hoid, cur->begin);
1676 if (cmp < 0) {
1677 n = n->rb_left;
1678 } else if (cmp > 0) {
1679 if (hoid_compare(hoid, cur->end) < 0)
1680 return cur;
1681
1682 n = n->rb_right;
1683 } else {
1684 return cur;
1685 }
1686 }
1687
1688 return NULL;
1689}
1690
1691/*
1692 * Each backoff has a unique id within its OSD session.
1693 */
1694DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1695
1696static void clear_backoffs(struct ceph_osd *osd)
1697{
1698 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1699 struct ceph_spg_mapping *spg =
1700 rb_entry(rb_first(&osd->o_backoff_mappings),
1701 struct ceph_spg_mapping, node);
1702
1703 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1704 struct ceph_osd_backoff *backoff =
1705 rb_entry(rb_first(&spg->backoffs),
1706 struct ceph_osd_backoff, spg_node);
1707
1708 erase_backoff(&spg->backoffs, backoff);
1709 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1710 free_backoff(backoff);
1711 }
1712 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1713 free_spg_mapping(spg);
1714 }
1715}
1716
1717/*
1718 * Set up a temporary, non-owning view into @t.
1719 */
1720static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1721 const struct ceph_osd_request_target *t)
1722{
1723 hoid->key = NULL;
1724 hoid->key_len = 0;
1725 hoid->oid = t->target_oid.name;
1726 hoid->oid_len = t->target_oid.name_len;
1727 hoid->snapid = CEPH_NOSNAP;
1728 hoid->hash = t->pgid.seed;
1729 hoid->is_max = false;
1730 if (t->target_oloc.pool_ns) {
1731 hoid->nspace = t->target_oloc.pool_ns->str;
1732 hoid->nspace_len = t->target_oloc.pool_ns->len;
1733 } else {
1734 hoid->nspace = NULL;
1735 hoid->nspace_len = 0;
1736 }
1737 hoid->pool = t->target_oloc.pool;
1738 ceph_hoid_build_hash_cache(hoid);
1739}
1740
1741static bool should_plug_request(struct ceph_osd_request *req)
1742{
1743 struct ceph_osd *osd = req->r_osd;
1744 struct ceph_spg_mapping *spg;
1745 struct ceph_osd_backoff *backoff;
1746 struct ceph_hobject_id hoid;
1747
1748 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1749 if (!spg)
1750 return false;
1751
1752 hoid_fill_from_target(&hoid, &req->r_t);
1753 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1754 if (!backoff)
1755 return false;
1756
1757 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1758 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1759 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1760 return true;
1761}
1762
bb873b53
ID		 1763static void setup_request_data(struct ceph_osd_request *req,
1764 struct ceph_msg *msg)
f24e9980 1765{
bb873b53
ID		 1766 u32 data_len = 0;
1767 int i;
1768
1769 if (!list_empty(&msg->data))
1770 return;
f24e9980 1771
bb873b53
ID		 1772 WARN_ON(msg->data_length);
1773 for (i = 0; i < req->r_num_ops; i++) {
1774 struct ceph_osd_req_op *op = &req->r_ops[i];
1775
1776 switch (op->op) {
1777 /* request */
1778 case CEPH_OSD_OP_WRITE:
1779 case CEPH_OSD_OP_WRITEFULL:
1780 WARN_ON(op->indata_len != op->extent.length);
1781 ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1782 break;
1783 case CEPH_OSD_OP_SETXATTR:
1784 case CEPH_OSD_OP_CMPXATTR:
1785 WARN_ON(op->indata_len != op->xattr.name_len +
1786 op->xattr.value_len);
1787 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1788 break;
922dab61
ID		 1789 case CEPH_OSD_OP_NOTIFY_ACK:
1790 ceph_osdc_msg_data_add(msg,
1791 &op->notify_ack.request_data);
1792 break;
bb873b53
ID		 1793
1794 /* reply */
1795 case CEPH_OSD_OP_STAT:
1796 ceph_osdc_msg_data_add(req->r_reply,
1797 &op->raw_data_in);
1798 break;
1799 case CEPH_OSD_OP_READ:
1800 ceph_osdc_msg_data_add(req->r_reply,
1801 &op->extent.osd_data);
1802 break;
a4ed38d7
DF		 1803 case CEPH_OSD_OP_LIST_WATCHERS:
1804 ceph_osdc_msg_data_add(req->r_reply,
1805 &op->list_watchers.response_data);
1806 break;
bb873b53
ID		 1807
1808 /* both */
1809 case CEPH_OSD_OP_CALL:
1810 WARN_ON(op->indata_len != op->cls.class_len +
1811 op->cls.method_len +
1812 op->cls.indata_len);
1813 ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1814 /* optional, can be NONE */
1815 ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1816 /* optional, can be NONE */
1817 ceph_osdc_msg_data_add(req->r_reply,
1818 &op->cls.response_data);
1819 break;
19079203
ID		 1820 case CEPH_OSD_OP_NOTIFY:
1821 ceph_osdc_msg_data_add(msg,
1822 &op->notify.request_data);
1823 ceph_osdc_msg_data_add(req->r_reply,
1824 &op->notify.response_data);
1825 break;
bb873b53
ID		 1826 }
1827
1828 data_len += op->indata_len;
1829 }
1b83bef2 1830
bb873b53
ID		 1831 WARN_ON(data_len != msg->data_length);
1832}
1833
2e59ffd1
ID		 1834static void encode_pgid(void **p, const struct ceph_pg *pgid)
1835{
1836 ceph_encode_8(p, 1);
1837 ceph_encode_64(p, pgid->pool);
1838 ceph_encode_32(p, pgid->seed);
1839 ceph_encode_32(p, -1); /* preferred */
1840}
1841
8cb441c0
ID		 1842static void encode_spgid(void **p, const struct ceph_spg *spgid)
1843{
1844 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
1845 encode_pgid(p, &spgid->pgid);
1846 ceph_encode_8(p, spgid->shard);
1847}
1848
2e59ffd1
ID		 1849static void encode_oloc(void **p, void *end,
1850 const struct ceph_object_locator *oloc)
1851{
1852 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
1853 ceph_encode_64(p, oloc->pool);
1854 ceph_encode_32(p, -1); /* preferred */
1855 ceph_encode_32(p, 0); /* key len */
1856 if (oloc->pool_ns)
1857 ceph_encode_string(p, end, oloc->pool_ns->str,
1858 oloc->pool_ns->len);
1859 else
1860 ceph_encode_32(p, 0);
1861}
1862
8cb441c0
ID		 1863static void encode_request_partial(struct ceph_osd_request *req,
1864 struct ceph_msg *msg)
bb873b53
ID		 1865{
1866 void *p = msg->front.iov_base;
1867 void *const end = p + msg->front_alloc_len;
1868 u32 data_len = 0;
1869 int i;
1870
1871 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1872 /* snapshots aren't writeable */
1873 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1874 } else {
1875 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1876 req->r_data_offset || req->r_snapc);
1877 }
1878
1879 setup_request_data(req, msg);
1880
8cb441c0
ID		 1881 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
1882 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
bb873b53
ID		 1883 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1884 ceph_encode_32(&p, req->r_flags);
8cb441c0
ID		 1885
1886 /* reqid */
1887 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
1888 memset(p, 0, sizeof(struct ceph_osd_reqid));
1889 p += sizeof(struct ceph_osd_reqid);
1890
1891 /* trace */
1892 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
1893 p += sizeof(struct ceph_blkin_trace_info);
1894
1895 ceph_encode_32(&p, 0); /* client_inc, always 0 */
bb873b53
ID		 1896 ceph_encode_timespec(p, &req->r_mtime);
1897 p += sizeof(struct ceph_timespec);
aa26d662 1898
2e59ffd1 1899 encode_oloc(&p, end, &req->r_t.target_oloc);
2e59ffd1
ID		 1900 ceph_encode_string(&p, end, req->r_t.target_oid.name,
1901 req->r_t.target_oid.name_len);
f24e9980 1902
bb873b53
ID		 1903 /* ops, can imply data */
1904 ceph_encode_16(&p, req->r_num_ops);
1905 for (i = 0; i < req->r_num_ops; i++) {
1906 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1907 p += sizeof(struct ceph_osd_op);
1908 }
26be8808 1909
bb873b53
ID		 1910 ceph_encode_64(&p, req->r_snapid); /* snapid */
1911 if (req->r_snapc) {
1912 ceph_encode_64(&p, req->r_snapc->seq);
1913 ceph_encode_32(&p, req->r_snapc->num_snaps);
1914 for (i = 0; i < req->r_snapc->num_snaps; i++)
1915 ceph_encode_64(&p, req->r_snapc->snaps[i]);
1916 } else {
1917 ceph_encode_64(&p, 0); /* snap_seq */
1918 ceph_encode_32(&p, 0); /* snaps len */
1919 }
1920
1921 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
986e8989 1922 BUG_ON(p > end - 8); /* space for features */
bb873b53 1923
8cb441c0
ID		 1924 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
1925 /* front_len is finalized in encode_request_finish() */
986e8989
ID		 1926 msg->front.iov_len = p - msg->front.iov_base;
1927 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
bb873b53
ID		 1928 msg->hdr.data_len = cpu_to_le32(data_len);
1929 /*
1930 * The header "data_off" is a hint to the receiver allowing it
1931 * to align received data into its buffers such that there's no
1932 * need to re-copy it before writing it to disk (direct I/O).
1933 */
1934 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
26be8808 1935
8cb441c0
ID		 1936 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
1937 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
1938}
1939
1940static void encode_request_finish(struct ceph_msg *msg)
1941{
1942 void *p = msg->front.iov_base;
986e8989 1943 void *const partial_end = p + msg->front.iov_len;
8cb441c0
ID		 1944 void *const end = p + msg->front_alloc_len;
1945
1946 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
1947 /* luminous OSD -- encode features and be done */
986e8989 1948 p = partial_end;
8cb441c0
ID		 1949 ceph_encode_64(&p, msg->con->peer_features);
1950 } else {
1951 struct {
1952 char spgid[CEPH_ENCODING_START_BLK_LEN +
1953 CEPH_PGID_ENCODING_LEN + 1];
1954 __le32 hash;
1955 __le32 epoch;
1956 __le32 flags;
1957 char reqid[CEPH_ENCODING_START_BLK_LEN +
1958 sizeof(struct ceph_osd_reqid)];
1959 char trace[sizeof(struct ceph_blkin_trace_info)];
1960 __le32 client_inc;
1961 struct ceph_timespec mtime;
1962 } __packed head;
1963 struct ceph_pg pgid;
1964 void *oloc, *oid, *tail;
1965 int oloc_len, oid_len, tail_len;
1966 int len;
1967
1968 /*
1969 * Pre-luminous OSD -- reencode v8 into v4 using @head
1970 * as a temporary buffer. Encode the raw PG; the rest
1971 * is just a matter of moving oloc, oid and tail blobs
1972 * around.
1973 */
1974 memcpy(&head, p, sizeof(head));
1975 p += sizeof(head);
1976
1977 oloc = p;
1978 p += CEPH_ENCODING_START_BLK_LEN;
1979 pgid.pool = ceph_decode_64(&p);
1980 p += 4 + 4; /* preferred, key len */
1981 len = ceph_decode_32(&p);
1982 p += len; /* nspace */
1983 oloc_len = p - oloc;
1984
1985 oid = p;
1986 len = ceph_decode_32(&p);
1987 p += len;
1988 oid_len = p - oid;
1989
1990 tail = p;
986e8989 1991 tail_len = partial_end - p;
8cb441c0
ID		 1992
1993 p = msg->front.iov_base;
1994 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
1995 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
1996 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
1997 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
1998
1999 /* reassert_version */
2000 memset(p, 0, sizeof(struct ceph_eversion));
2001 p += sizeof(struct ceph_eversion);
2002
2003 BUG_ON(p >= oloc);
2004 memmove(p, oloc, oloc_len);
2005 p += oloc_len;
2006
2007 pgid.seed = le32_to_cpu(head.hash);
2008 encode_pgid(&p, &pgid); /* raw pg */
2009
2010 BUG_ON(p >= oid);
2011 memmove(p, oid, oid_len);
2012 p += oid_len;
2013
2014 /* tail -- ops, snapid, snapc, retry_attempt */
2015 BUG_ON(p >= tail);
2016 memmove(p, tail, tail_len);
2017 p += tail_len;
2018
2019 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2020 }
2021
2022 BUG_ON(p > end);
2023 msg->front.iov_len = p - msg->front.iov_base;
2024 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2025
2026 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2027 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2028 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2029 le16_to_cpu(msg->hdr.version));
bb873b53
ID		 2030}
2031
2032/*
2033 * @req has to be assigned a tid and registered.
2034 */
2035static void send_request(struct ceph_osd_request *req)
2036{
2037 struct ceph_osd *osd = req->r_osd;
2038
5aea3dcd 2039 verify_osd_locked(osd);
bb873b53
ID		 2040 WARN_ON(osd->o_osd != req->r_t.osd);
2041
a02a946d
ID		 2042 /* backoff? */
2043 if (should_plug_request(req))
2044 return;
2045
5aea3dcd
ID		 2046 /*
2047 * We may have a previously queued request message hanging
2048 * around. Cancel it to avoid corrupting the msgr.
2049 */
2050 if (req->r_sent)
2051 ceph_msg_revoke(req->r_request);
2052
bb873b53
ID		 2053 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2054 if (req->r_attempts)
2055 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2056 else
2057 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2058
8cb441c0 2059 encode_request_partial(req, req->r_request);
bb873b53 2060
04c7d789 2061 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 2062 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
dc98ff72 2063 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
04c7d789
ID		 2064 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2065 req->r_attempts);
bb873b53
ID		 2066
2067 req->r_t.paused = false;
2068 req->r_stamp = jiffies;
2069 req->r_attempts++;
2070
2071 req->r_sent = osd->o_incarnation;
2072 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2073 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
f24e9980
SW		 2074}
2075
42c1b124
ID		 2076static void maybe_request_map(struct ceph_osd_client *osdc)
2077{
2078 bool continuous = false;
2079
5aea3dcd 2080 verify_osdc_locked(osdc);
42c1b124
ID		 2081 WARN_ON(!osdc->osdmap->epoch);
2082
b7ec35b3
ID		 2083 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2084 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2085 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
42c1b124
ID		 2086 dout("%s osdc %p continuous\n", __func__, osdc);
2087 continuous = true;
2088 } else {
2089 dout("%s osdc %p onetime\n", __func__, osdc);
2090 }
2091
2092 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2093 osdc->osdmap->epoch + 1, continuous))
2094 ceph_monc_renew_subs(&osdc->client->monc);
2095}
2096
a1f4020a 2097static void complete_request(struct ceph_osd_request *req, int err);
4609245e
ID		 2098static void send_map_check(struct ceph_osd_request *req);
2099
5aea3dcd 2100static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
0bbfdfe8 2101{
5aea3dcd
ID		 2102 struct ceph_osd_client *osdc = req->r_osdc;
2103 struct ceph_osd *osd;
4609245e 2104 enum calc_target_result ct_res;
5aea3dcd
ID		 2105 bool need_send = false;
2106 bool promoted = false;
a1f4020a 2107 bool need_abort = false;
0bbfdfe8 2108
b18b9550 2109 WARN_ON(req->r_tid);
5aea3dcd
ID		 2110 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2111
2112again:
7de030d6 2113 ct_res = calc_target(osdc, &req->r_t, NULL, false);
4609245e
ID		 2114 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2115 goto promote;
2116
5aea3dcd
ID		 2117 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2118 if (IS_ERR(osd)) {
2119 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2120 goto promote;
0bbfdfe8
ID		 2121 }
2122
58eb7932
JL		 2123 if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2124 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2125 osdc->epoch_barrier);
2126 req->r_t.paused = true;
2127 maybe_request_map(osdc);
2128 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2129 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
5aea3dcd
ID		 2130 dout("req %p pausewr\n", req);
2131 req->r_t.paused = true;
2132 maybe_request_map(osdc);
2133 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
b7ec35b3 2134 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
5aea3dcd
ID		 2135 dout("req %p pauserd\n", req);
2136 req->r_t.paused = true;
2137 maybe_request_map(osdc);
2138 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2139 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2140 CEPH_OSD_FLAG_FULL_FORCE)) &&
b7ec35b3 2141 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
5aea3dcd
ID		 2142 pool_full(osdc, req->r_t.base_oloc.pool))) {
2143 dout("req %p full/pool_full\n", req);
2144 pr_warn_ratelimited("FULL or reached pool quota\n");
2145 req->r_t.paused = true;
2146 maybe_request_map(osdc);
a1f4020a
JL		 2147 if (req->r_abort_on_full)
2148 need_abort = true;
5aea3dcd
ID		 2149 } else if (!osd_homeless(osd)) {
2150 need_send = true;
0bbfdfe8 2151 } else {
5aea3dcd 2152 maybe_request_map(osdc);
0bbfdfe8
ID		 2153 }
2154
5aea3dcd
ID		 2155 mutex_lock(&osd->lock);
2156 /*
2157 * Assign the tid atomically with send_request() to protect
2158 * multiple writes to the same object from racing with each
2159 * other, resulting in out of order ops on the OSDs.
2160 */
2161 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2162 link_request(osd, req);
2163 if (need_send)
2164 send_request(req);
a1f4020a
JL		 2165 else if (need_abort)
2166 complete_request(req, -ENOSPC);
5aea3dcd
ID		 2167 mutex_unlock(&osd->lock);
2168
4609245e
ID		 2169 if (ct_res == CALC_TARGET_POOL_DNE)
2170 send_map_check(req);
2171
5aea3dcd
ID		 2172 if (promoted)
2173 downgrade_write(&osdc->lock);
2174 return;
2175
2176promote:
2177 up_read(&osdc->lock);
2178 down_write(&osdc->lock);
2179 wrlocked = true;
2180 promoted = true;
2181 goto again;
2182}
2183
2184static void account_request(struct ceph_osd_request *req)
2185{
54ea0046 2186 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
b18b9550 2187 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
5aea3dcd 2188
b18b9550 2189 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
5aea3dcd 2190 atomic_inc(&req->r_osdc->num_requests);
7cc5e38f
ID		 2191
2192 req->r_start_stamp = jiffies;
5aea3dcd
ID		 2193}
2194
2195static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2196{
2197 ceph_osdc_get_request(req);
2198 account_request(req);
2199 __submit_request(req, wrlocked);
2200}
2201
45ee2c1d 2202static void finish_request(struct ceph_osd_request *req)
5aea3dcd
ID		 2203{
2204 struct ceph_osd_client *osdc = req->r_osdc;
5aea3dcd 2205
04c7d789 2206 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
5aea3dcd
ID		 2207 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2208
04c7d789
ID		 2209 if (req->r_osd)
2210 unlink_request(req->r_osd, req);
5aea3dcd
ID		 2211 atomic_dec(&osdc->num_requests);
2212
2213 /*
2214 * If an OSD has failed or returned and a request has been sent
2215 * twice, it's possible to get a reply and end up here while the
2216 * request message is queued for delivery. We will ignore the
2217 * reply, so not a big deal, but better to try and catch it.
2218 */
2219 ceph_msg_revoke(req->r_request);
2220 ceph_msg_revoke_incoming(req->r_reply);
2221}
2222
fe5da05e
ID		 2223static void __complete_request(struct ceph_osd_request *req)
2224{
b18b9550
ID		 2225 if (req->r_callback) {
2226 dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
2227 req->r_tid, req->r_callback, req->r_result);
fe5da05e 2228 req->r_callback(req);
b18b9550 2229 }
fe5da05e
ID		 2230}
2231
4609245e 2232/*
b18b9550 2233 * This is open-coded in handle_reply().
4609245e
ID		 2234 */
2235static void complete_request(struct ceph_osd_request *req, int err)
2236{
2237 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2238
2239 req->r_result = err;
45ee2c1d 2240 finish_request(req);
4609245e 2241 __complete_request(req);
b18b9550 2242 complete_all(&req->r_completion);
4609245e
ID		 2243 ceph_osdc_put_request(req);
2244}
2245
2246static void cancel_map_check(struct ceph_osd_request *req)
2247{
2248 struct ceph_osd_client *osdc = req->r_osdc;
2249 struct ceph_osd_request *lookup_req;
2250
2251 verify_osdc_wrlocked(osdc);
2252
2253 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2254 if (!lookup_req)
2255 return;
2256
2257 WARN_ON(lookup_req != req);
2258 erase_request_mc(&osdc->map_checks, req);
2259 ceph_osdc_put_request(req);
2260}
2261
5aea3dcd
ID		 2262static void cancel_request(struct ceph_osd_request *req)
2263{
2264 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2265
4609245e 2266 cancel_map_check(req);
45ee2c1d 2267 finish_request(req);
b18b9550 2268 complete_all(&req->r_completion);
c297eb42 2269 ceph_osdc_put_request(req);
5aea3dcd
ID		 2270}
2271
7cc5e38f
ID		 2272static void abort_request(struct ceph_osd_request *req, int err)
2273{
2274 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2275
2276 cancel_map_check(req);
2277 complete_request(req, err);
2278}
2279
58eb7932
JL		 2280static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2281{
2282 if (likely(eb > osdc->epoch_barrier)) {
2283 dout("updating epoch_barrier from %u to %u\n",
2284 osdc->epoch_barrier, eb);
2285 osdc->epoch_barrier = eb;
2286 /* Request map if we're not to the barrier yet */
2287 if (eb > osdc->osdmap->epoch)
2288 maybe_request_map(osdc);
2289 }
2290}
2291
2292void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2293{
2294 down_read(&osdc->lock);
2295 if (unlikely(eb > osdc->epoch_barrier)) {
2296 up_read(&osdc->lock);
2297 down_write(&osdc->lock);
2298 update_epoch_barrier(osdc, eb);
2299 up_write(&osdc->lock);
2300 } else {
2301 up_read(&osdc->lock);
2302 }
2303}
2304EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2305
fc36d0a4
JL		 2306/*
2307 * Drop all pending requests that are stalled waiting on a full condition to
58eb7932
JL		 2308 * clear, and complete them with ENOSPC as the return code. Set the
2309 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2310 * cancelled.
fc36d0a4
JL		 2311 */
2312static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2313{
2314 struct rb_node *n;
58eb7932 2315 bool victims = false;
fc36d0a4
JL		 2316
2317 dout("enter abort_on_full\n");
2318
2319 if (!ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !have_pool_full(osdc))
2320 goto out;
2321
58eb7932
JL		 2322 /* Scan list and see if there is anything to abort */
2323 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2324 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2325 struct rb_node *m;
2326
2327 m = rb_first(&osd->o_requests);
2328 while (m) {
2329 struct ceph_osd_request *req = rb_entry(m,
2330 struct ceph_osd_request, r_node);
2331 m = rb_next(m);
2332
2333 if (req->r_abort_on_full) {
2334 victims = true;
2335 break;
2336 }
2337 }
2338 if (victims)
2339 break;
2340 }
2341
2342 if (!victims)
2343 goto out;
2344
2345 /*
2346 * Update the barrier to current epoch if it's behind that point,
2347 * since we know we have some calls to be aborted in the tree.
2348 */
2349 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2350
fc36d0a4
JL		 2351 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2352 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2353 struct rb_node *m;
2354
2355 m = rb_first(&osd->o_requests);
2356 while (m) {
2357 struct ceph_osd_request *req = rb_entry(m,
2358 struct ceph_osd_request, r_node);
2359 m = rb_next(m);
2360
2361 if (req->r_abort_on_full &&
2362 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2363 pool_full(osdc, req->r_t.target_oloc.pool)))
2364 abort_request(req, -ENOSPC);
2365 }
2366 }
2367out:
58eb7932 2368 dout("return abort_on_full barrier=%u\n", osdc->epoch_barrier);
fc36d0a4
JL		 2369}
2370
4609245e
ID		 2371static void check_pool_dne(struct ceph_osd_request *req)
2372{
2373 struct ceph_osd_client *osdc = req->r_osdc;
2374 struct ceph_osdmap *map = osdc->osdmap;
2375
2376 verify_osdc_wrlocked(osdc);
2377 WARN_ON(!map->epoch);
2378
2379 if (req->r_attempts) {
2380 /*
2381 * We sent a request earlier, which means that
2382 * previously the pool existed, and now it does not
2383 * (i.e., it was deleted).
2384 */
2385 req->r_map_dne_bound = map->epoch;
2386 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2387 req->r_tid);
2388 } else {
2389 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2390 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2391 }
2392
2393 if (req->r_map_dne_bound) {
2394 if (map->epoch >= req->r_map_dne_bound) {
2395 /* we had a new enough map */
2396 pr_info_ratelimited("tid %llu pool does not exist\n",
2397 req->r_tid);
2398 complete_request(req, -ENOENT);
2399 }
2400 } else {
2401 send_map_check(req);
2402 }
2403}
2404
2405static void map_check_cb(struct ceph_mon_generic_request *greq)
2406{
2407 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2408 struct ceph_osd_request *req;
2409 u64 tid = greq->private_data;
2410
2411 WARN_ON(greq->result || !greq->u.newest);
2412
2413 down_write(&osdc->lock);
2414 req = lookup_request_mc(&osdc->map_checks, tid);
2415 if (!req) {
2416 dout("%s tid %llu dne\n", __func__, tid);
2417 goto out_unlock;
2418 }
2419
2420 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2421 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2422 if (!req->r_map_dne_bound)
2423 req->r_map_dne_bound = greq->u.newest;
2424 erase_request_mc(&osdc->map_checks, req);
2425 check_pool_dne(req);
2426
2427 ceph_osdc_put_request(req);
2428out_unlock:
2429 up_write(&osdc->lock);
2430}
2431
2432static void send_map_check(struct ceph_osd_request *req)
2433{
2434 struct ceph_osd_client *osdc = req->r_osdc;
2435 struct ceph_osd_request *lookup_req;
2436 int ret;
2437
2438 verify_osdc_wrlocked(osdc);
2439
2440 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2441 if (lookup_req) {
2442 WARN_ON(lookup_req != req);
2443 return;
2444 }
2445
2446 ceph_osdc_get_request(req);
2447 insert_request_mc(&osdc->map_checks, req);
2448 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2449 map_check_cb, req->r_tid);
2450 WARN_ON(ret);
2451}
2452
922dab61
ID		 2453/*
2454 * lingering requests, watch/notify v2 infrastructure
2455 */
2456static void linger_release(struct kref *kref)
2457{
2458 struct ceph_osd_linger_request *lreq =
2459 container_of(kref, struct ceph_osd_linger_request, kref);
2460
2461 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2462 lreq->reg_req, lreq->ping_req);
2463 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2464 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
4609245e 2465 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
922dab61 2466 WARN_ON(!list_empty(&lreq->scan_item));
b07d3c4b 2467 WARN_ON(!list_empty(&lreq->pending_lworks));
922dab61
ID		 2468 WARN_ON(lreq->osd);
2469
2470 if (lreq->reg_req)
2471 ceph_osdc_put_request(lreq->reg_req);
2472 if (lreq->ping_req)
2473 ceph_osdc_put_request(lreq->ping_req);
2474 target_destroy(&lreq->t);
2475 kfree(lreq);
2476}
2477
2478static void linger_put(struct ceph_osd_linger_request *lreq)
2479{
2480 if (lreq)
2481 kref_put(&lreq->kref, linger_release);
2482}
2483
2484static struct ceph_osd_linger_request *
2485linger_get(struct ceph_osd_linger_request *lreq)
2486{
2487 kref_get(&lreq->kref);
2488 return lreq;
2489}
2490
2491static struct ceph_osd_linger_request *
2492linger_alloc(struct ceph_osd_client *osdc)
2493{
2494 struct ceph_osd_linger_request *lreq;
2495
2496 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2497 if (!lreq)
2498 return NULL;
2499
2500 kref_init(&lreq->kref);
2501 mutex_init(&lreq->lock);
2502 RB_CLEAR_NODE(&lreq->node);
2503 RB_CLEAR_NODE(&lreq->osdc_node);
4609245e 2504 RB_CLEAR_NODE(&lreq->mc_node);
922dab61 2505 INIT_LIST_HEAD(&lreq->scan_item);
b07d3c4b 2506 INIT_LIST_HEAD(&lreq->pending_lworks);
922dab61 2507 init_completion(&lreq->reg_commit_wait);
19079203 2508 init_completion(&lreq->notify_finish_wait);
922dab61
ID		 2509
2510 lreq->osdc = osdc;
2511 target_init(&lreq->t);
2512
2513 dout("%s lreq %p\n", __func__, lreq);
2514 return lreq;
2515}
2516
2517DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2518DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
4609245e 2519DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
922dab61
ID		 2520
2521/*
2522 * Create linger request <-> OSD session relation.
2523 *
2524 * @lreq has to be registered, @osd may be homeless.
2525 */
2526static void link_linger(struct ceph_osd *osd,
2527 struct ceph_osd_linger_request *lreq)
2528{
2529 verify_osd_locked(osd);
2530 WARN_ON(!lreq->linger_id || lreq->osd);
2531 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2532 osd->o_osd, lreq, lreq->linger_id);
2533
2534 if (!osd_homeless(osd))
2535 __remove_osd_from_lru(osd);
2536 else
2537 atomic_inc(&osd->o_osdc->num_homeless);
2538
2539 get_osd(osd);
2540 insert_linger(&osd->o_linger_requests, lreq);
2541 lreq->osd = osd;
2542}
2543
2544static void unlink_linger(struct ceph_osd *osd,
2545 struct ceph_osd_linger_request *lreq)
2546{
2547 verify_osd_locked(osd);
2548 WARN_ON(lreq->osd != osd);
2549 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2550 osd->o_osd, lreq, lreq->linger_id);
2551
2552 lreq->osd = NULL;
2553 erase_linger(&osd->o_linger_requests, lreq);
2554 put_osd(osd);
2555
2556 if (!osd_homeless(osd))
2557 maybe_move_osd_to_lru(osd);
2558 else
2559 atomic_dec(&osd->o_osdc->num_homeless);
2560}
2561
2562static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2563{
2564 verify_osdc_locked(lreq->osdc);
2565
2566 return !RB_EMPTY_NODE(&lreq->osdc_node);
2567}
2568
2569static bool linger_registered(struct ceph_osd_linger_request *lreq)
2570{
2571 struct ceph_osd_client *osdc = lreq->osdc;
2572 bool registered;
2573
2574 down_read(&osdc->lock);
2575 registered = __linger_registered(lreq);
2576 up_read(&osdc->lock);
2577
2578 return registered;
2579}
2580
2581static void linger_register(struct ceph_osd_linger_request *lreq)
2582{
2583 struct ceph_osd_client *osdc = lreq->osdc;
2584
2585 verify_osdc_wrlocked(osdc);
2586 WARN_ON(lreq->linger_id);
2587
2588 linger_get(lreq);
2589 lreq->linger_id = ++osdc->last_linger_id;
2590 insert_linger_osdc(&osdc->linger_requests, lreq);
2591}
2592
2593static void linger_unregister(struct ceph_osd_linger_request *lreq)
2594{
2595 struct ceph_osd_client *osdc = lreq->osdc;
2596
2597 verify_osdc_wrlocked(osdc);
2598
2599 erase_linger_osdc(&osdc->linger_requests, lreq);
2600 linger_put(lreq);
2601}
2602
2603static void cancel_linger_request(struct ceph_osd_request *req)
2604{
2605 struct ceph_osd_linger_request *lreq = req->r_priv;
2606
2607 WARN_ON(!req->r_linger);
2608 cancel_request(req);
2609 linger_put(lreq);
2610}
2611
2612struct linger_work {
2613 struct work_struct work;
2614 struct ceph_osd_linger_request *lreq;
b07d3c4b
ID		 2615 struct list_head pending_item;
2616 unsigned long queued_stamp;
922dab61
ID		 2617
2618 union {
2619 struct {
2620 u64 notify_id;
2621 u64 notifier_id;
2622 void *payload; /* points into @msg front */
2623 size_t payload_len;
2624
2625 struct ceph_msg *msg; /* for ceph_msg_put() */
2626 } notify;
2627 struct {
2628 int err;
2629 } error;
2630 };
2631};
2632
2633static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2634 work_func_t workfn)
2635{
2636 struct linger_work *lwork;
2637
2638 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2639 if (!lwork)
2640 return NULL;
2641
2642 INIT_WORK(&lwork->work, workfn);
b07d3c4b 2643 INIT_LIST_HEAD(&lwork->pending_item);
922dab61
ID		 2644 lwork->lreq = linger_get(lreq);
2645
2646 return lwork;
2647}
2648
2649static void lwork_free(struct linger_work *lwork)
2650{
2651 struct ceph_osd_linger_request *lreq = lwork->lreq;
2652
b07d3c4b
ID		 2653 mutex_lock(&lreq->lock);
2654 list_del(&lwork->pending_item);
2655 mutex_unlock(&lreq->lock);
2656
922dab61
ID		 2657 linger_put(lreq);
2658 kfree(lwork);
2659}
2660
2661static void lwork_queue(struct linger_work *lwork)
2662{
2663 struct ceph_osd_linger_request *lreq = lwork->lreq;
2664 struct ceph_osd_client *osdc = lreq->osdc;
2665
2666 verify_lreq_locked(lreq);
b07d3c4b
ID		 2667 WARN_ON(!list_empty(&lwork->pending_item));
2668
2669 lwork->queued_stamp = jiffies;
2670 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
922dab61
ID		 2671 queue_work(osdc->notify_wq, &lwork->work);
2672}
2673
2674static void do_watch_notify(struct work_struct *w)
2675{
2676 struct linger_work *lwork = container_of(w, struct linger_work, work);
2677 struct ceph_osd_linger_request *lreq = lwork->lreq;
2678
2679 if (!linger_registered(lreq)) {
2680 dout("%s lreq %p not registered\n", __func__, lreq);
2681 goto out;
2682 }
2683
19079203 2684 WARN_ON(!lreq->is_watch);
922dab61
ID		 2685 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2686 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2687 lwork->notify.payload_len);
2688 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2689 lwork->notify.notifier_id, lwork->notify.payload,
2690 lwork->notify.payload_len);
2691
2692out:
2693 ceph_msg_put(lwork->notify.msg);
2694 lwork_free(lwork);
2695}
2696
2697static void do_watch_error(struct work_struct *w)
2698{
2699 struct linger_work *lwork = container_of(w, struct linger_work, work);
2700 struct ceph_osd_linger_request *lreq = lwork->lreq;
2701
2702 if (!linger_registered(lreq)) {
2703 dout("%s lreq %p not registered\n", __func__, lreq);
2704 goto out;
2705 }
2706
2707 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2708 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2709
2710out:
2711 lwork_free(lwork);
2712}
2713
2714static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2715{
2716 struct linger_work *lwork;
2717
2718 lwork = lwork_alloc(lreq, do_watch_error);
2719 if (!lwork) {
2720 pr_err("failed to allocate error-lwork\n");
2721 return;
2722 }
2723
2724 lwork->error.err = lreq->last_error;
2725 lwork_queue(lwork);
2726}
2727
2728static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2729 int result)
2730{
2731 if (!completion_done(&lreq->reg_commit_wait)) {
2732 lreq->reg_commit_error = (result <= 0 ? result : 0);
2733 complete_all(&lreq->reg_commit_wait);
2734 }
2735}
2736
2737static void linger_commit_cb(struct ceph_osd_request *req)
2738{
2739 struct ceph_osd_linger_request *lreq = req->r_priv;
2740
2741 mutex_lock(&lreq->lock);
2742 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2743 lreq->linger_id, req->r_result);
922dab61
ID		 2744 linger_reg_commit_complete(lreq, req->r_result);
2745 lreq->committed = true;
2746
19079203
ID		 2747 if (!lreq->is_watch) {
2748 struct ceph_osd_data *osd_data =
2749 osd_req_op_data(req, 0, notify, response_data);
2750 void *p = page_address(osd_data->pages[0]);
2751
2752 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2753 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2754
2755 /* make note of the notify_id */
2756 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2757 lreq->notify_id = ceph_decode_64(&p);
2758 dout("lreq %p notify_id %llu\n", lreq,
2759 lreq->notify_id);
2760 } else {
2761 dout("lreq %p no notify_id\n", lreq);
2762 }
2763 }
2764
922dab61
ID		 2765 mutex_unlock(&lreq->lock);
2766 linger_put(lreq);
2767}
2768
2769static int normalize_watch_error(int err)
2770{
2771 /*
2772 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2773 * notification and a failure to reconnect because we raced with
2774 * the delete appear the same to the user.
2775 */
2776 if (err == -ENOENT)
2777 err = -ENOTCONN;
2778
2779 return err;
2780}
2781
2782static void linger_reconnect_cb(struct ceph_osd_request *req)
2783{
2784 struct ceph_osd_linger_request *lreq = req->r_priv;
2785
2786 mutex_lock(&lreq->lock);
2787 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2788 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2789 if (req->r_result < 0) {
2790 if (!lreq->last_error) {
2791 lreq->last_error = normalize_watch_error(req->r_result);
2792 queue_watch_error(lreq);
2793 }
2794 }
2795
2796 mutex_unlock(&lreq->lock);
2797 linger_put(lreq);
2798}
2799
2800static void send_linger(struct ceph_osd_linger_request *lreq)
2801{
2802 struct ceph_osd_request *req = lreq->reg_req;
2803 struct ceph_osd_req_op *op = &req->r_ops[0];
2804
2805 verify_osdc_wrlocked(req->r_osdc);
2806 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2807
2808 if (req->r_osd)
2809 cancel_linger_request(req);
2810
2811 request_reinit(req);
2812 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2813 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2814 req->r_flags = lreq->t.flags;
2815 req->r_mtime = lreq->mtime;
2816
2817 mutex_lock(&lreq->lock);
19079203 2818 if (lreq->is_watch && lreq->committed) {
922dab61
ID		 2819 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2820 op->watch.cookie != lreq->linger_id);
2821 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2822 op->watch.gen = ++lreq->register_gen;
2823 dout("lreq %p reconnect register_gen %u\n", lreq,
2824 op->watch.gen);
2825 req->r_callback = linger_reconnect_cb;
2826 } else {
19079203
ID		 2827 if (!lreq->is_watch)
2828 lreq->notify_id = 0;
2829 else
2830 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 2831 dout("lreq %p register\n", lreq);
2832 req->r_callback = linger_commit_cb;
2833 }
2834 mutex_unlock(&lreq->lock);
2835
2836 req->r_priv = linger_get(lreq);
2837 req->r_linger = true;
2838
2839 submit_request(req, true);
2840}
2841
2842static void linger_ping_cb(struct ceph_osd_request *req)
2843{
2844 struct ceph_osd_linger_request *lreq = req->r_priv;
2845
2846 mutex_lock(&lreq->lock);
2847 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
2848 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
2849 lreq->last_error);
2850 if (lreq->register_gen == req->r_ops[0].watch.gen) {
b07d3c4b
ID		 2851 if (!req->r_result) {
2852 lreq->watch_valid_thru = lreq->ping_sent;
2853 } else if (!lreq->last_error) {
922dab61
ID		 2854 lreq->last_error = normalize_watch_error(req->r_result);
2855 queue_watch_error(lreq);
2856 }
2857 } else {
2858 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
2859 lreq->register_gen, req->r_ops[0].watch.gen);
2860 }
2861
2862 mutex_unlock(&lreq->lock);
2863 linger_put(lreq);
2864}
2865
2866static void send_linger_ping(struct ceph_osd_linger_request *lreq)
2867{
2868 struct ceph_osd_client *osdc = lreq->osdc;
2869 struct ceph_osd_request *req = lreq->ping_req;
2870 struct ceph_osd_req_op *op = &req->r_ops[0];
2871
b7ec35b3 2872 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
922dab61
ID		 2873 dout("%s PAUSERD\n", __func__);
2874 return;
2875 }
2876
2877 lreq->ping_sent = jiffies;
2878 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
2879 __func__, lreq, lreq->linger_id, lreq->ping_sent,
2880 lreq->register_gen);
2881
2882 if (req->r_osd)
2883 cancel_linger_request(req);
2884
2885 request_reinit(req);
2886 target_copy(&req->r_t, &lreq->t);
2887
2888 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2889 op->watch.cookie != lreq->linger_id ||
2890 op->watch.op != CEPH_OSD_WATCH_OP_PING);
2891 op->watch.gen = lreq->register_gen;
2892 req->r_callback = linger_ping_cb;
2893 req->r_priv = linger_get(lreq);
2894 req->r_linger = true;
2895
2896 ceph_osdc_get_request(req);
2897 account_request(req);
2898 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2899 link_request(lreq->osd, req);
2900 send_request(req);
2901}
2902
2903static void linger_submit(struct ceph_osd_linger_request *lreq)
2904{
2905 struct ceph_osd_client *osdc = lreq->osdc;
2906 struct ceph_osd *osd;
2907
7de030d6 2908 calc_target(osdc, &lreq->t, NULL, false);
922dab61
ID		 2909 osd = lookup_create_osd(osdc, lreq->t.osd, true);
2910 link_linger(osd, lreq);
2911
2912 send_linger(lreq);
2913}
2914
4609245e
ID		 2915static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
2916{
2917 struct ceph_osd_client *osdc = lreq->osdc;
2918 struct ceph_osd_linger_request *lookup_lreq;
2919
2920 verify_osdc_wrlocked(osdc);
2921
2922 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2923 lreq->linger_id);
2924 if (!lookup_lreq)
2925 return;
2926
2927 WARN_ON(lookup_lreq != lreq);
2928 erase_linger_mc(&osdc->linger_map_checks, lreq);
2929 linger_put(lreq);
2930}
2931
922dab61
ID		 2932/*
2933 * @lreq has to be both registered and linked.
2934 */
2935static void __linger_cancel(struct ceph_osd_linger_request *lreq)
2936{
19079203 2937 if (lreq->is_watch && lreq->ping_req->r_osd)
922dab61
ID		 2938 cancel_linger_request(lreq->ping_req);
2939 if (lreq->reg_req->r_osd)
2940 cancel_linger_request(lreq->reg_req);
4609245e 2941 cancel_linger_map_check(lreq);
922dab61
ID		 2942 unlink_linger(lreq->osd, lreq);
2943 linger_unregister(lreq);
2944}
2945
2946static void linger_cancel(struct ceph_osd_linger_request *lreq)
2947{
2948 struct ceph_osd_client *osdc = lreq->osdc;
2949
2950 down_write(&osdc->lock);
2951 if (__linger_registered(lreq))
2952 __linger_cancel(lreq);
2953 up_write(&osdc->lock);
2954}
2955
4609245e
ID		 2956static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
2957
2958static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
2959{
2960 struct ceph_osd_client *osdc = lreq->osdc;
2961 struct ceph_osdmap *map = osdc->osdmap;
2962
2963 verify_osdc_wrlocked(osdc);
2964 WARN_ON(!map->epoch);
2965
2966 if (lreq->register_gen) {
2967 lreq->map_dne_bound = map->epoch;
2968 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
2969 lreq, lreq->linger_id);
2970 } else {
2971 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
2972 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
2973 map->epoch);
2974 }
2975
2976 if (lreq->map_dne_bound) {
2977 if (map->epoch >= lreq->map_dne_bound) {
2978 /* we had a new enough map */
2979 pr_info("linger_id %llu pool does not exist\n",
2980 lreq->linger_id);
2981 linger_reg_commit_complete(lreq, -ENOENT);
2982 __linger_cancel(lreq);
2983 }
2984 } else {
2985 send_linger_map_check(lreq);
2986 }
2987}
2988
2989static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
2990{
2991 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2992 struct ceph_osd_linger_request *lreq;
2993 u64 linger_id = greq->private_data;
2994
2995 WARN_ON(greq->result || !greq->u.newest);
2996
2997 down_write(&osdc->lock);
2998 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
2999 if (!lreq) {
3000 dout("%s linger_id %llu dne\n", __func__, linger_id);
3001 goto out_unlock;
3002 }
3003
3004 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3005 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3006 greq->u.newest);
3007 if (!lreq->map_dne_bound)
3008 lreq->map_dne_bound = greq->u.newest;
3009 erase_linger_mc(&osdc->linger_map_checks, lreq);
3010 check_linger_pool_dne(lreq);
3011
3012 linger_put(lreq);
3013out_unlock:
3014 up_write(&osdc->lock);
3015}
3016
3017static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3018{
3019 struct ceph_osd_client *osdc = lreq->osdc;
3020 struct ceph_osd_linger_request *lookup_lreq;
3021 int ret;
3022
3023 verify_osdc_wrlocked(osdc);
3024
3025 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3026 lreq->linger_id);
3027 if (lookup_lreq) {
3028 WARN_ON(lookup_lreq != lreq);
3029 return;
3030 }
3031
3032 linger_get(lreq);
3033 insert_linger_mc(&osdc->linger_map_checks, lreq);
3034 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3035 linger_map_check_cb, lreq->linger_id);
3036 WARN_ON(ret);
3037}
3038
922dab61
ID		 3039static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3040{
3041 int ret;
3042
3043 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3044 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3045 return ret ?: lreq->reg_commit_error;
3046}
3047
19079203
ID		 3048static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3049{
3050 int ret;
3051
3052 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3053 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3054 return ret ?: lreq->notify_finish_error;
3055}
3056
f24e9980 3057/*
fbca9635
ID		 3058 * Timeout callback, called every N seconds. When 1 or more OSD
3059 * requests has been active for more than N seconds, we send a keepalive
3060 * (tag + timestamp) to its OSD to ensure any communications channel
3061 * reset is detected.
f24e9980
SW		 3062 */
3063static void handle_timeout(struct work_struct *work)
3064{
3065 struct ceph_osd_client *osdc =
3066 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 3067 struct ceph_options *opts = osdc->client->options;
5aea3dcd 3068 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
7cc5e38f 3069 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
5aea3dcd
ID		 3070 LIST_HEAD(slow_osds);
3071 struct rb_node *n, *p;
f24e9980 3072
5aea3dcd
ID		 3073 dout("%s osdc %p\n", __func__, osdc);
3074 down_write(&osdc->lock);
f24e9980 3075
422d2cb8
YS		 3076 /*
3077 * ping osds that are a bit slow. this ensures that if there
3078 * is a break in the TCP connection we will notice, and reopen
3079 * a connection with that osd (from the fault callback).
3080 */
5aea3dcd
ID		 3081 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3082 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3083 bool found = false;
3084
7cc5e38f 3085 for (p = rb_first(&osd->o_requests); p; ) {
5aea3dcd
ID		 3086 struct ceph_osd_request *req =
3087 rb_entry(p, struct ceph_osd_request, r_node);
3088
7cc5e38f
ID		 3089 p = rb_next(p); /* abort_request() */
3090
5aea3dcd
ID		 3091 if (time_before(req->r_stamp, cutoff)) {
3092 dout(" req %p tid %llu on osd%d is laggy\n",
3093 req, req->r_tid, osd->o_osd);
3094 found = true;
3095 }
7cc5e38f
ID		 3096 if (opts->osd_request_timeout &&
3097 time_before(req->r_start_stamp, expiry_cutoff)) {
3098 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3099 req->r_tid, osd->o_osd);
3100 abort_request(req, -ETIMEDOUT);
3101 }
5aea3dcd 3102 }
922dab61
ID		 3103 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3104 struct ceph_osd_linger_request *lreq =
3105 rb_entry(p, struct ceph_osd_linger_request, node);
3106
3107 dout(" lreq %p linger_id %llu is served by osd%d\n",
3108 lreq, lreq->linger_id, osd->o_osd);
3109 found = true;
3110
3111 mutex_lock(&lreq->lock);
19079203 3112 if (lreq->is_watch && lreq->committed && !lreq->last_error)
922dab61
ID		 3113 send_linger_ping(lreq);
3114 mutex_unlock(&lreq->lock);
3115 }
422d2cb8 3116
5aea3dcd
ID		 3117 if (found)
3118 list_move_tail(&osd->o_keepalive_item, &slow_osds);
422d2cb8 3119 }
5aea3dcd 3120
7cc5e38f
ID		 3121 if (opts->osd_request_timeout) {
3122 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3123 struct ceph_osd_request *req =
3124 rb_entry(p, struct ceph_osd_request, r_node);
3125
3126 p = rb_next(p); /* abort_request() */
3127
3128 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3129 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3130 req->r_tid, osdc->homeless_osd.o_osd);
3131 abort_request(req, -ETIMEDOUT);
3132 }
3133 }
3134 }
3135
5aea3dcd
ID		 3136 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3137 maybe_request_map(osdc);
3138
422d2cb8 3139 while (!list_empty(&slow_osds)) {
5aea3dcd
ID		 3140 struct ceph_osd *osd = list_first_entry(&slow_osds,
3141 struct ceph_osd,
3142 o_keepalive_item);
422d2cb8 3143 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 3144 ceph_con_keepalive(&osd->o_con);
3145 }
3146
5aea3dcd 3147 up_write(&osdc->lock);
fbca9635
ID		 3148 schedule_delayed_work(&osdc->timeout_work,
3149 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 3150}
3151
f5a2041b
YS		 3152static void handle_osds_timeout(struct work_struct *work)
3153{
3154 struct ceph_osd_client *osdc =
3155 container_of(work, struct ceph_osd_client,
3156 osds_timeout_work.work);
a319bf56 3157 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 3158 struct ceph_osd *osd, *nosd;
f5a2041b 3159
42a2c09f 3160 dout("%s osdc %p\n", __func__, osdc);
5aea3dcd 3161 down_write(&osdc->lock);
42a2c09f
ID		 3162 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3163 if (time_before(jiffies, osd->lru_ttl))
3164 break;
3165
5aea3dcd 3166 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 3167 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
5aea3dcd 3168 close_osd(osd);
42a2c09f 3169 }
f5a2041b 3170
5aea3dcd 3171 up_write(&osdc->lock);
f5a2041b
YS		 3172 schedule_delayed_work(&osdc->osds_timeout_work,
3173 round_jiffies_relative(delay));
3174}
3175
205ee118
ID		 3176static int ceph_oloc_decode(void **p, void *end,
3177 struct ceph_object_locator *oloc)
3178{
3179 u8 struct_v, struct_cv;
3180 u32 len;
3181 void *struct_end;
3182 int ret = 0;
3183
3184 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3185 struct_v = ceph_decode_8(p);
3186 struct_cv = ceph_decode_8(p);
3187 if (struct_v < 3) {
3188 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3189 struct_v, struct_cv);
3190 goto e_inval;
3191 }
3192 if (struct_cv > 6) {
3193 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3194 struct_v, struct_cv);
3195 goto e_inval;
3196 }
3197 len = ceph_decode_32(p);
3198 ceph_decode_need(p, end, len, e_inval);
3199 struct_end = *p + len;
3200
3201 oloc->pool = ceph_decode_64(p);
3202 *p += 4; /* skip preferred */
3203
3204 len = ceph_decode_32(p);
3205 if (len > 0) {
3206 pr_warn("ceph_object_locator::key is set\n");
3207 goto e_inval;
3208 }
3209
3210 if (struct_v >= 5) {
cd08e0a2
YZ		 3211 bool changed = false;
3212
205ee118
ID		 3213 len = ceph_decode_32(p);
3214 if (len > 0) {
30c156d9 3215 ceph_decode_need(p, end, len, e_inval);
cd08e0a2
YZ		 3216 if (!oloc->pool_ns ||
3217 ceph_compare_string(oloc->pool_ns, *p, len))
3218 changed = true;
30c156d9 3219 *p += len;
cd08e0a2
YZ		 3220 } else {
3221 if (oloc->pool_ns)
3222 changed = true;
3223 }
3224 if (changed) {
3225 /* redirect changes namespace */
3226 pr_warn("ceph_object_locator::nspace is changed\n");
3227 goto e_inval;
205ee118
ID		 3228 }
3229 }
3230
3231 if (struct_v >= 6) {
3232 s64 hash = ceph_decode_64(p);
3233 if (hash != -1) {
3234 pr_warn("ceph_object_locator::hash is set\n");
3235 goto e_inval;
3236 }
3237 }
3238
3239 /* skip the rest */
3240 *p = struct_end;
3241out:
3242 return ret;
3243
3244e_inval:
3245 ret = -EINVAL;
3246 goto out;
3247}
3248
3249static int ceph_redirect_decode(void **p, void *end,
3250 struct ceph_request_redirect *redir)
3251{
3252 u8 struct_v, struct_cv;
3253 u32 len;
3254 void *struct_end;
3255 int ret;
3256
3257 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3258 struct_v = ceph_decode_8(p);
3259 struct_cv = ceph_decode_8(p);
3260 if (struct_cv > 1) {
3261 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3262 struct_v, struct_cv);
3263 goto e_inval;
3264 }
3265 len = ceph_decode_32(p);
3266 ceph_decode_need(p, end, len, e_inval);
3267 struct_end = *p + len;
3268
3269 ret = ceph_oloc_decode(p, end, &redir->oloc);
3270 if (ret)
3271 goto out;
3272
3273 len = ceph_decode_32(p);
3274 if (len > 0) {
3275 pr_warn("ceph_request_redirect::object_name is set\n");
3276 goto e_inval;
3277 }
3278
3279 len = ceph_decode_32(p);
3280 *p += len; /* skip osd_instructions */
3281
3282 /* skip the rest */
3283 *p = struct_end;
3284out:
3285 return ret;
3286
3287e_inval:
3288 ret = -EINVAL;
3289 goto out;
3290}
3291
fe5da05e
ID		 3292struct MOSDOpReply {
3293 struct ceph_pg pgid;
3294 u64 flags;
3295 int result;
3296 u32 epoch;
3297 int num_ops;
3298 u32 outdata_len[CEPH_OSD_MAX_OPS];
3299 s32 rval[CEPH_OSD_MAX_OPS];
3300 int retry_attempt;
3301 struct ceph_eversion replay_version;
3302 u64 user_version;
3303 struct ceph_request_redirect redirect;
3304};
25845472 3305
fe5da05e 3306static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 3307{
fe5da05e
ID		 3308 void *p = msg->front.iov_base;
3309 void *const end = p + msg->front.iov_len;
3310 u16 version = le16_to_cpu(msg->hdr.version);
3311 struct ceph_eversion bad_replay_version;
b0b31a8f 3312 u8 decode_redir;
fe5da05e
ID		 3313 u32 len;
3314 int ret;
3315 int i;
1b83bef2 3316
fe5da05e
ID		 3317 ceph_decode_32_safe(&p, end, len, e_inval);
3318 ceph_decode_need(&p, end, len, e_inval);
3319 p += len; /* skip oid */
1b83bef2 3320
fe5da05e
ID		 3321 ret = ceph_decode_pgid(&p, end, &m->pgid);
3322 if (ret)
3323 return ret;
1b83bef2 3324
fe5da05e
ID		 3325 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3326 ceph_decode_32_safe(&p, end, m->result, e_inval);
3327 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3328 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3329 p += sizeof(bad_replay_version);
3330 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 3331
fe5da05e
ID		 3332 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3333 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3334 goto e_inval;
1b83bef2 3335
fe5da05e
ID		 3336 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3337 e_inval);
3338 for (i = 0; i < m->num_ops; i++) {
1b83bef2 3339 struct ceph_osd_op *op = p;
1b83bef2 3340
fe5da05e 3341 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 3342 p += sizeof(*op);
3343 }
1b83bef2 3344
fe5da05e
ID		 3345 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3346 for (i = 0; i < m->num_ops; i++)
3347 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 3348
fe5da05e
ID		 3349 if (version >= 5) {
3350 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3351 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3352 p += sizeof(m->replay_version);
3353 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3354 } else {
3355 m->replay_version = bad_replay_version; /* struct */
3356 m->user_version = le64_to_cpu(m->replay_version.version);
3357 }
eb845ff1 3358
fe5da05e
ID		 3359 if (version >= 6) {
3360 if (version >= 7)
3361 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 3362 else
3363 decode_redir = 1;
3364 } else {
3365 decode_redir = 0;
3366 }
3367
3368 if (decode_redir) {
fe5da05e
ID		 3369 ret = ceph_redirect_decode(&p, end, &m->redirect);
3370 if (ret)
3371 return ret;
205ee118 3372 } else {
fe5da05e 3373 ceph_oloc_init(&m->redirect.oloc);
205ee118 3374 }
f24e9980 3375
fe5da05e
ID		 3376 return 0;
3377
3378e_inval:
3379 return -EINVAL;
3380}
3381
3382/*
b18b9550
ID		 3383 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3384 * specified.
fe5da05e 3385 */
5aea3dcd 3386static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
fe5da05e 3387{
5aea3dcd 3388 struct ceph_osd_client *osdc = osd->o_osdc;
fe5da05e
ID		 3389 struct ceph_osd_request *req;
3390 struct MOSDOpReply m;
3391 u64 tid = le64_to_cpu(msg->hdr.tid);
3392 u32 data_len = 0;
fe5da05e
ID		 3393 int ret;
3394 int i;
3395
3396 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3397
5aea3dcd
ID		 3398 down_read(&osdc->lock);
3399 if (!osd_registered(osd)) {
3400 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3401 goto out_unlock_osdc;
3402 }
3403 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3404
3405 mutex_lock(&osd->lock);
3406 req = lookup_request(&osd->o_requests, tid);
fe5da05e 3407 if (!req) {
5aea3dcd
ID		 3408 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3409 goto out_unlock_session;
fe5da05e 3410 }
fe5da05e 3411
cd08e0a2 3412 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
fe5da05e 3413 ret = decode_MOSDOpReply(msg, &m);
cd08e0a2 3414 m.redirect.oloc.pool_ns = NULL;
fe5da05e
ID		 3415 if (ret) {
3416 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3417 req->r_tid, ret);
3418 ceph_msg_dump(msg);
3419 goto fail_request;
3420 }
3421 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3422 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3423 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3424 le64_to_cpu(m.replay_version.version), m.user_version);
3425
3426 if (m.retry_attempt >= 0) {
3427 if (m.retry_attempt != req->r_attempts - 1) {
3428 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3429 req, req->r_tid, m.retry_attempt,
3430 req->r_attempts - 1);
5aea3dcd 3431 goto out_unlock_session;
fe5da05e
ID		 3432 }
3433 } else {
3434 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3435 }
3436
3437 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3438 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3439 m.redirect.oloc.pool);
5aea3dcd
ID		 3440 unlink_request(osd, req);
3441 mutex_unlock(&osd->lock);
205ee118 3442
30c156d9
YZ		 3443 /*
3444 * Not ceph_oloc_copy() - changing pool_ns is not
3445 * supported.
3446 */
3447 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
5aea3dcd
ID		 3448 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
3449 req->r_tid = 0;
3450 __submit_request(req, false);
3451 goto out_unlock_osdc;
205ee118
ID		 3452 }
3453
fe5da05e
ID		 3454 if (m.num_ops != req->r_num_ops) {
3455 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3456 req->r_num_ops, req->r_tid);
3457 goto fail_request;
f24e9980 3458 }
fe5da05e
ID		 3459 for (i = 0; i < req->r_num_ops; i++) {
3460 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3461 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3462 req->r_ops[i].rval = m.rval[i];
3463 req->r_ops[i].outdata_len = m.outdata_len[i];
3464 data_len += m.outdata_len[i];
3465 }
3466 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3467 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3468 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3469 goto fail_request;
3470 }
b18b9550
ID		 3471 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3472 req, req->r_tid, m.result, data_len);
f24e9980 3473
b18b9550
ID		 3474 /*
3475 * Since we only ever request ONDISK, we should only ever get
3476 * one (type of) reply back.
3477 */
3478 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3479 req->r_result = m.result ?: data_len;
3480 finish_request(req);
5aea3dcd
ID		 3481 mutex_unlock(&osd->lock);
3482 up_read(&osdc->lock);
f24e9980 3483
b18b9550
ID		 3484 __complete_request(req);
3485 complete_all(&req->r_completion);
3486 ceph_osdc_put_request(req);
f24e9980
SW		 3487 return;
3488
fe5da05e 3489fail_request:
4609245e 3490 complete_request(req, -EIO);
5aea3dcd
ID		 3491out_unlock_session:
3492 mutex_unlock(&osd->lock);
3493out_unlock_osdc:
3494 up_read(&osdc->lock);
f24e9980
SW		 3495}
3496
42c1b124
ID		 3497static void set_pool_was_full(struct ceph_osd_client *osdc)
3498{
3499 struct rb_node *n;
3500
3501 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3502 struct ceph_pg_pool_info *pi =
3503 rb_entry(n, struct ceph_pg_pool_info, node);
3504
3505 pi->was_full = __pool_full(pi);
3506 }
3507}
3508
5aea3dcd 3509static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
f24e9980 3510{
5aea3dcd 3511 struct ceph_pg_pool_info *pi;
f24e9980 3512
5aea3dcd
ID		 3513 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3514 if (!pi)
3515 return false;
f24e9980 3516
5aea3dcd 3517 return pi->was_full && !__pool_full(pi);
422d2cb8
YS		 3518}
3519
922dab61
ID		 3520static enum calc_target_result
3521recalc_linger_target(struct ceph_osd_linger_request *lreq)
3522{
3523 struct ceph_osd_client *osdc = lreq->osdc;
3524 enum calc_target_result ct_res;
3525
7de030d6 3526 ct_res = calc_target(osdc, &lreq->t, NULL, true);
922dab61
ID		 3527 if (ct_res == CALC_TARGET_NEED_RESEND) {
3528 struct ceph_osd *osd;
3529
3530 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3531 if (osd != lreq->osd) {
3532 unlink_linger(lreq->osd, lreq);
3533 link_linger(osd, lreq);
3534 }
3535 }
3536
3537 return ct_res;
3538}
3539
422d2cb8 3540/*
5aea3dcd 3541 * Requeue requests whose mapping to an OSD has changed.
422d2cb8 3542 */
5aea3dcd
ID		 3543static void scan_requests(struct ceph_osd *osd,
3544 bool force_resend,
3545 bool cleared_full,
3546 bool check_pool_cleared_full,
3547 struct rb_root *need_resend,
3548 struct list_head *need_resend_linger)
422d2cb8 3549{
5aea3dcd
ID		 3550 struct ceph_osd_client *osdc = osd->o_osdc;
3551 struct rb_node *n;
3552 bool force_resend_writes;
3553
922dab61
ID		 3554 for (n = rb_first(&osd->o_linger_requests); n; ) {
3555 struct ceph_osd_linger_request *lreq =
3556 rb_entry(n, struct ceph_osd_linger_request, node);
3557 enum calc_target_result ct_res;
3558
3559 n = rb_next(n); /* recalc_linger_target() */
3560
3561 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3562 lreq->linger_id);
3563 ct_res = recalc_linger_target(lreq);
3564 switch (ct_res) {
3565 case CALC_TARGET_NO_ACTION:
3566 force_resend_writes = cleared_full ||
3567 (check_pool_cleared_full &&
3568 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3569 if (!force_resend && !force_resend_writes)
3570 break;
3571
3572 /* fall through */
3573 case CALC_TARGET_NEED_RESEND:
4609245e 3574 cancel_linger_map_check(lreq);
922dab61
ID		 3575 /*
3576 * scan_requests() for the previous epoch(s)
3577 * may have already added it to the list, since
3578 * it's not unlinked here.
3579 */
3580 if (list_empty(&lreq->scan_item))
3581 list_add_tail(&lreq->scan_item, need_resend_linger);
3582 break;
3583 case CALC_TARGET_POOL_DNE:
a10bcb19 3584 list_del_init(&lreq->scan_item);
4609245e 3585 check_linger_pool_dne(lreq);
922dab61
ID		 3586 break;
3587 }
3588 }
3589
5aea3dcd
ID		 3590 for (n = rb_first(&osd->o_requests); n; ) {
3591 struct ceph_osd_request *req =
3592 rb_entry(n, struct ceph_osd_request, r_node);
3593 enum calc_target_result ct_res;
3594
4609245e 3595 n = rb_next(n); /* unlink_request(), check_pool_dne() */
5aea3dcd
ID		 3596
3597 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
7de030d6
ID		 3598 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
3599 false);
5aea3dcd
ID		 3600 switch (ct_res) {
3601 case CALC_TARGET_NO_ACTION:
3602 force_resend_writes = cleared_full ||
3603 (check_pool_cleared_full &&
3604 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3605 if (!force_resend &&
3606 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3607 !force_resend_writes))
3608 break;
3609
3610 /* fall through */
3611 case CALC_TARGET_NEED_RESEND:
4609245e 3612 cancel_map_check(req);
5aea3dcd
ID		 3613 unlink_request(osd, req);
3614 insert_request(need_resend, req);
3615 break;
3616 case CALC_TARGET_POOL_DNE:
4609245e 3617 check_pool_dne(req);
5aea3dcd 3618 break;
b0494532 3619 }
6f6c7006 3620 }
422d2cb8 3621}
6f6c7006 3622
42c1b124 3623static int handle_one_map(struct ceph_osd_client *osdc,
5aea3dcd
ID		 3624 void *p, void *end, bool incremental,
3625 struct rb_root *need_resend,
3626 struct list_head *need_resend_linger)
42c1b124
ID		 3627{
3628 struct ceph_osdmap *newmap;
3629 struct rb_node *n;
3630 bool skipped_map = false;
3631 bool was_full;
3632
b7ec35b3 3633 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
42c1b124
ID		 3634 set_pool_was_full(osdc);
3635
3636 if (incremental)
3637 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3638 else
3639 newmap = ceph_osdmap_decode(&p, end);
3640 if (IS_ERR(newmap))
3641 return PTR_ERR(newmap);
3642
3643 if (newmap != osdc->osdmap) {
3644 /*
3645 * Preserve ->was_full before destroying the old map.
3646 * For pools that weren't in the old map, ->was_full
3647 * should be false.
3648 */
3649 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3650 struct ceph_pg_pool_info *pi =
3651 rb_entry(n, struct ceph_pg_pool_info, node);
3652 struct ceph_pg_pool_info *old_pi;
3653
3654 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3655 if (old_pi)
3656 pi->was_full = old_pi->was_full;
3657 else
3658 WARN_ON(pi->was_full);
3659 }
3660
3661 if (osdc->osdmap->epoch &&
3662 osdc->osdmap->epoch + 1 < newmap->epoch) {
3663 WARN_ON(incremental);
3664 skipped_map = true;
3665 }
3666
3667 ceph_osdmap_destroy(osdc->osdmap);
3668 osdc->osdmap = newmap;
3669 }
3670
b7ec35b3 3671 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
5aea3dcd
ID		 3672 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3673 need_resend, need_resend_linger);
3674
3675 for (n = rb_first(&osdc->osds); n; ) {
3676 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3677
3678 n = rb_next(n); /* close_osd() */
3679
3680 scan_requests(osd, skipped_map, was_full, true, need_resend,
3681 need_resend_linger);
3682 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3683 memcmp(&osd->o_con.peer_addr,
3684 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3685 sizeof(struct ceph_entity_addr)))
3686 close_osd(osd);
3687 }
42c1b124
ID		 3688
3689 return 0;
3690}
6f6c7006 3691
5aea3dcd
ID		 3692static void kick_requests(struct ceph_osd_client *osdc,
3693 struct rb_root *need_resend,
3694 struct list_head *need_resend_linger)
3695{
922dab61 3696 struct ceph_osd_linger_request *lreq, *nlreq;
04c7d789 3697 enum calc_target_result ct_res;
5aea3dcd
ID		 3698 struct rb_node *n;
3699
04c7d789
ID		 3700 /* make sure need_resend targets reflect latest map */
3701 for (n = rb_first(need_resend); n; ) {
3702 struct ceph_osd_request *req =
3703 rb_entry(n, struct ceph_osd_request, r_node);
3704
3705 n = rb_next(n);
3706
3707 if (req->r_t.epoch < osdc->osdmap->epoch) {
3708 ct_res = calc_target(osdc, &req->r_t, NULL, false);
3709 if (ct_res == CALC_TARGET_POOL_DNE) {
3710 erase_request(need_resend, req);
3711 check_pool_dne(req);
3712 }
3713 }
3714 }
3715
5aea3dcd
ID		 3716 for (n = rb_first(need_resend); n; ) {
3717 struct ceph_osd_request *req =
3718 rb_entry(n, struct ceph_osd_request, r_node);
3719 struct ceph_osd *osd;
3720
3721 n = rb_next(n);
3722 erase_request(need_resend, req); /* before link_request() */
3723
5aea3dcd
ID		 3724 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3725 link_request(osd, req);
3726 if (!req->r_linger) {
3727 if (!osd_homeless(osd) && !req->r_t.paused)
3728 send_request(req);
922dab61
ID		 3729 } else {
3730 cancel_linger_request(req);
5aea3dcd
ID		 3731 }
3732 }
922dab61
ID		 3733
3734 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3735 if (!osd_homeless(lreq->osd))
3736 send_linger(lreq);
3737
3738 list_del_init(&lreq->scan_item);
3739 }
5aea3dcd
ID		 3740}
3741
f24e9980
SW		 3742/*
3743 * Process updated osd map.
3744 *
3745 * The message contains any number of incremental and full maps, normally
3746 * indicating some sort of topology change in the cluster. Kick requests
3747 * off to different OSDs as needed.
3748 */
3749void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3750{
42c1b124
ID		 3751 void *p = msg->front.iov_base;
3752 void *const end = p + msg->front.iov_len;
f24e9980
SW		 3753 u32 nr_maps, maplen;
3754 u32 epoch;
f24e9980 3755 struct ceph_fsid fsid;
5aea3dcd
ID		 3756 struct rb_root need_resend = RB_ROOT;
3757 LIST_HEAD(need_resend_linger);
42c1b124
ID		 3758 bool handled_incremental = false;
3759 bool was_pauserd, was_pausewr;
3760 bool pauserd, pausewr;
3761 int err;
f24e9980 3762
42c1b124 3763 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
5aea3dcd 3764 down_write(&osdc->lock);
f24e9980
SW		 3765
3766 /* verify fsid */
3767 ceph_decode_need(&p, end, sizeof(fsid), bad);
3768 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 3769 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 3770 goto bad;
f24e9980 3771
b7ec35b3
ID		 3772 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3773 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3774 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3775 have_pool_full(osdc);
9a1ea2db 3776
f24e9980
SW		 3777 /* incremental maps */
3778 ceph_decode_32_safe(&p, end, nr_maps, bad);
3779 dout(" %d inc maps\n", nr_maps);
3780 while (nr_maps > 0) {
3781 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3782 epoch = ceph_decode_32(&p);
3783 maplen = ceph_decode_32(&p);
f24e9980 3784 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 3785 if (osdc->osdmap->epoch &&
3786 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 3787 dout("applying incremental map %u len %d\n",
3788 epoch, maplen);
5aea3dcd
ID		 3789 err = handle_one_map(osdc, p, p + maplen, true,
3790 &need_resend, &need_resend_linger);
42c1b124 3791 if (err)
f24e9980 3792 goto bad;
42c1b124 3793 handled_incremental = true;
f24e9980
SW		 3794 } else {
3795 dout("ignoring incremental map %u len %d\n",
3796 epoch, maplen);
3797 }
42c1b124 3798 p += maplen;
f24e9980
SW		 3799 nr_maps--;
3800 }
42c1b124 3801 if (handled_incremental)
f24e9980
SW		 3802 goto done;
3803
3804 /* full maps */
3805 ceph_decode_32_safe(&p, end, nr_maps, bad);
3806 dout(" %d full maps\n", nr_maps);
3807 while (nr_maps) {
3808 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3809 epoch = ceph_decode_32(&p);
3810 maplen = ceph_decode_32(&p);
f24e9980
SW		 3811 ceph_decode_need(&p, end, maplen, bad);
3812 if (nr_maps > 1) {
3813 dout("skipping non-latest full map %u len %d\n",
3814 epoch, maplen);
e5253a7b 3815 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 3816 dout("skipping full map %u len %d, "
3817 "older than our %u\n", epoch, maplen,
3818 osdc->osdmap->epoch);
3819 } else {
3820 dout("taking full map %u len %d\n", epoch, maplen);
5aea3dcd
ID		 3821 err = handle_one_map(osdc, p, p + maplen, false,
3822 &need_resend, &need_resend_linger);
42c1b124 3823 if (err)
f24e9980 3824 goto bad;
f24e9980
SW		 3825 }
3826 p += maplen;
3827 nr_maps--;
3828 }
3829
3830done:
cd634fb6
SW		 3831 /*
3832 * subscribe to subsequent osdmap updates if full to ensure
3833 * we find out when we are no longer full and stop returning
3834 * ENOSPC.
3835 */
b7ec35b3
ID		 3836 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3837 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3838 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3839 have_pool_full(osdc);
58eb7932
JL		 3840 if (was_pauserd || was_pausewr || pauserd || pausewr ||
3841 osdc->osdmap->epoch < osdc->epoch_barrier)
42c1b124 3842 maybe_request_map(osdc);
cd634fb6 3843
5aea3dcd 3844 kick_requests(osdc, &need_resend, &need_resend_linger);
42c1b124 3845
fc36d0a4 3846 ceph_osdc_abort_on_full(osdc);
42c1b124
ID		 3847 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
3848 osdc->osdmap->epoch);
5aea3dcd 3849 up_write(&osdc->lock);
03066f23 3850 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 3851 return;
3852
3853bad:
3854 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 3855 ceph_msg_dump(msg);
5aea3dcd
ID		 3856 up_write(&osdc->lock);
3857}
3858
3859/*
3860 * Resubmit requests pending on the given osd.
3861 */
3862static void kick_osd_requests(struct ceph_osd *osd)
3863{
3864 struct rb_node *n;
3865
a02a946d
ID		 3866 clear_backoffs(osd);
3867
922dab61 3868 for (n = rb_first(&osd->o_requests); n; ) {
5aea3dcd
ID		 3869 struct ceph_osd_request *req =
3870 rb_entry(n, struct ceph_osd_request, r_node);
3871
922dab61
ID		 3872 n = rb_next(n); /* cancel_linger_request() */
3873
5aea3dcd
ID		 3874 if (!req->r_linger) {
3875 if (!req->r_t.paused)
3876 send_request(req);
922dab61
ID		 3877 } else {
3878 cancel_linger_request(req);
5aea3dcd
ID		 3879 }
3880 }
922dab61
ID		 3881 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
3882 struct ceph_osd_linger_request *lreq =
3883 rb_entry(n, struct ceph_osd_linger_request, node);
3884
3885 send_linger(lreq);
3886 }
5aea3dcd
ID		 3887}
3888
3889/*
3890 * If the osd connection drops, we need to resubmit all requests.
3891 */
3892static void osd_fault(struct ceph_connection *con)
3893{
3894 struct ceph_osd *osd = con->private;
3895 struct ceph_osd_client *osdc = osd->o_osdc;
3896
3897 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
3898
3899 down_write(&osdc->lock);
3900 if (!osd_registered(osd)) {
3901 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3902 goto out_unlock;
3903 }
3904
3905 if (!reopen_osd(osd))
3906 kick_osd_requests(osd);
3907 maybe_request_map(osdc);
3908
3909out_unlock:
3910 up_write(&osdc->lock);
f24e9980
SW		 3911}
3912
a02a946d
ID		 3913struct MOSDBackoff {
3914 struct ceph_spg spgid;
3915 u32 map_epoch;
3916 u8 op;
3917 u64 id;
3918 struct ceph_hobject_id *begin;
3919 struct ceph_hobject_id *end;
3920};
3921
3922static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
3923{
3924 void *p = msg->front.iov_base;
3925 void *const end = p + msg->front.iov_len;
3926 u8 struct_v;
3927 u32 struct_len;
3928 int ret;
3929
3930 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
3931 if (ret)
3932 return ret;
3933
3934 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
3935 if (ret)
3936 return ret;
3937
3938 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
3939 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
3940 ceph_decode_8_safe(&p, end, m->op, e_inval);
3941 ceph_decode_64_safe(&p, end, m->id, e_inval);
3942
3943 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
3944 if (!m->begin)
3945 return -ENOMEM;
3946
3947 ret = decode_hoid(&p, end, m->begin);
3948 if (ret) {
3949 free_hoid(m->begin);
3950 return ret;
3951 }
3952
3953 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
3954 if (!m->end) {
3955 free_hoid(m->begin);
3956 return -ENOMEM;
3957 }
3958
3959 ret = decode_hoid(&p, end, m->end);
3960 if (ret) {
3961 free_hoid(m->begin);
3962 free_hoid(m->end);
3963 return ret;
3964 }
3965
3966 return 0;
3967
3968e_inval:
3969 return -EINVAL;
3970}
3971
3972static struct ceph_msg *create_backoff_message(
3973 const struct ceph_osd_backoff *backoff,
3974 u32 map_epoch)
3975{
3976 struct ceph_msg *msg;
3977 void *p, *end;
3978 int msg_size;
3979
3980 msg_size = CEPH_ENCODING_START_BLK_LEN +
3981 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
3982 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
3983 msg_size += CEPH_ENCODING_START_BLK_LEN +
3984 hoid_encoding_size(backoff->begin);
3985 msg_size += CEPH_ENCODING_START_BLK_LEN +
3986 hoid_encoding_size(backoff->end);
3987
3988 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
3989 if (!msg)
3990 return NULL;
3991
3992 p = msg->front.iov_base;
3993 end = p + msg->front_alloc_len;
3994
3995 encode_spgid(&p, &backoff->spgid);
3996 ceph_encode_32(&p, map_epoch);
3997 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
3998 ceph_encode_64(&p, backoff->id);
3999 encode_hoid(&p, end, backoff->begin);
4000 encode_hoid(&p, end, backoff->end);
4001 BUG_ON(p != end);
4002
4003 msg->front.iov_len = p - msg->front.iov_base;
4004 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4005 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4006
4007 return msg;
4008}
4009
4010static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4011{
4012 struct ceph_spg_mapping *spg;
4013 struct ceph_osd_backoff *backoff;
4014 struct ceph_msg *msg;
4015
4016 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4017 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4018
4019 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4020 if (!spg) {
4021 spg = alloc_spg_mapping();
4022 if (!spg) {
4023 pr_err("%s failed to allocate spg\n", __func__);
4024 return;
4025 }
4026 spg->spgid = m->spgid; /* struct */
4027 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4028 }
4029
4030 backoff = alloc_backoff();
4031 if (!backoff) {
4032 pr_err("%s failed to allocate backoff\n", __func__);
4033 return;
4034 }
4035 backoff->spgid = m->spgid; /* struct */
4036 backoff->id = m->id;
4037 backoff->begin = m->begin;
4038 m->begin = NULL; /* backoff now owns this */
4039 backoff->end = m->end;
4040 m->end = NULL; /* ditto */
4041
4042 insert_backoff(&spg->backoffs, backoff);
4043 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4044
4045 /*
4046 * Ack with original backoff's epoch so that the OSD can
4047 * discard this if there was a PG split.
4048 */
4049 msg = create_backoff_message(backoff, m->map_epoch);
4050 if (!msg) {
4051 pr_err("%s failed to allocate msg\n", __func__);
4052 return;
4053 }
4054 ceph_con_send(&osd->o_con, msg);
4055}
4056
4057static bool target_contained_by(const struct ceph_osd_request_target *t,
4058 const struct ceph_hobject_id *begin,
4059 const struct ceph_hobject_id *end)
4060{
4061 struct ceph_hobject_id hoid;
4062 int cmp;
4063
4064 hoid_fill_from_target(&hoid, t);
4065 cmp = hoid_compare(&hoid, begin);
4066 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4067}
4068
4069static void handle_backoff_unblock(struct ceph_osd *osd,
4070 const struct MOSDBackoff *m)
4071{
4072 struct ceph_spg_mapping *spg;
4073 struct ceph_osd_backoff *backoff;
4074 struct rb_node *n;
4075
4076 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4077 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4078
4079 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4080 if (!backoff) {
4081 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4082 __func__, osd->o_osd, m->spgid.pgid.pool,
4083 m->spgid.pgid.seed, m->spgid.shard, m->id);
4084 return;
4085 }
4086
4087 if (hoid_compare(backoff->begin, m->begin) &&
4088 hoid_compare(backoff->end, m->end)) {
4089 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4090 __func__, osd->o_osd, m->spgid.pgid.pool,
4091 m->spgid.pgid.seed, m->spgid.shard, m->id);
4092 /* unblock it anyway... */
4093 }
4094
4095 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4096 BUG_ON(!spg);
4097
4098 erase_backoff(&spg->backoffs, backoff);
4099 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4100 free_backoff(backoff);
4101
4102 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4103 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4104 free_spg_mapping(spg);
4105 }
4106
4107 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4108 struct ceph_osd_request *req =
4109 rb_entry(n, struct ceph_osd_request, r_node);
4110
4111 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4112 /*
4113 * Match against @m, not @backoff -- the PG may
4114 * have split on the OSD.
4115 */
4116 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4117 /*
4118 * If no other installed backoff applies,
4119 * resend.
4120 */
4121 send_request(req);
4122 }
4123 }
4124 }
4125}
4126
4127static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4128{
4129 struct ceph_osd_client *osdc = osd->o_osdc;
4130 struct MOSDBackoff m;
4131 int ret;
4132
4133 down_read(&osdc->lock);
4134 if (!osd_registered(osd)) {
4135 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4136 up_read(&osdc->lock);
4137 return;
4138 }
4139 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4140
4141 mutex_lock(&osd->lock);
4142 ret = decode_MOSDBackoff(msg, &m);
4143 if (ret) {
4144 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4145 ceph_msg_dump(msg);
4146 goto out_unlock;
4147 }
4148
4149 switch (m.op) {
4150 case CEPH_OSD_BACKOFF_OP_BLOCK:
4151 handle_backoff_block(osd, &m);
4152 break;
4153 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4154 handle_backoff_unblock(osd, &m);
4155 break;
4156 default:
4157 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4158 }
4159
4160 free_hoid(m.begin);
4161 free_hoid(m.end);
4162
4163out_unlock:
4164 mutex_unlock(&osd->lock);
4165 up_read(&osdc->lock);
4166}
4167
a40c4f10
YS		 4168/*
4169 * Process osd watch notifications
4170 */
3c663bbd
AE		 4171static void handle_watch_notify(struct ceph_osd_client *osdc,
4172 struct ceph_msg *msg)
a40c4f10 4173{
922dab61
ID		 4174 void *p = msg->front.iov_base;
4175 void *const end = p + msg->front.iov_len;
4176 struct ceph_osd_linger_request *lreq;
4177 struct linger_work *lwork;
4178 u8 proto_ver, opcode;
4179 u64 cookie, notify_id;
4180 u64 notifier_id = 0;
19079203 4181 s32 return_code = 0;
922dab61
ID		 4182 void *payload = NULL;
4183 u32 payload_len = 0;
a40c4f10
YS		 4184
4185 ceph_decode_8_safe(&p, end, proto_ver, bad);
4186 ceph_decode_8_safe(&p, end, opcode, bad);
4187 ceph_decode_64_safe(&p, end, cookie, bad);
922dab61 4188 p += 8; /* skip ver */
a40c4f10
YS		 4189 ceph_decode_64_safe(&p, end, notify_id, bad);
4190
922dab61
ID		 4191 if (proto_ver >= 1) {
4192 ceph_decode_32_safe(&p, end, payload_len, bad);
4193 ceph_decode_need(&p, end, payload_len, bad);
4194 payload = p;
4195 p += payload_len;
4196 }
4197
4198 if (le16_to_cpu(msg->hdr.version) >= 2)
19079203 4199 ceph_decode_32_safe(&p, end, return_code, bad);
922dab61
ID		 4200
4201 if (le16_to_cpu(msg->hdr.version) >= 3)
4202 ceph_decode_64_safe(&p, end, notifier_id, bad);
4203
4204 down_read(&osdc->lock);
4205 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4206 if (!lreq) {
4207 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4208 cookie);
4209 goto out_unlock_osdc;
4210 }
4211
4212 mutex_lock(&lreq->lock);
19079203
ID		 4213 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4214 opcode, cookie, lreq, lreq->is_watch);
922dab61
ID		 4215 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4216 if (!lreq->last_error) {
4217 lreq->last_error = -ENOTCONN;
4218 queue_watch_error(lreq);
4219 }
19079203
ID		 4220 } else if (!lreq->is_watch) {
4221 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4222 if (lreq->notify_id && lreq->notify_id != notify_id) {
4223 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4224 lreq->notify_id, notify_id);
4225 } else if (!completion_done(&lreq->notify_finish_wait)) {
4226 struct ceph_msg_data *data =
4227 list_first_entry_or_null(&msg->data,
4228 struct ceph_msg_data,
4229 links);
4230
4231 if (data) {
4232 if (lreq->preply_pages) {
4233 WARN_ON(data->type !=
4234 CEPH_MSG_DATA_PAGES);
4235 *lreq->preply_pages = data->pages;
4236 *lreq->preply_len = data->length;
4237 } else {
4238 ceph_release_page_vector(data->pages,
4239 calc_pages_for(0, data->length));
4240 }
4241 }
4242 lreq->notify_finish_error = return_code;
4243 complete_all(&lreq->notify_finish_wait);
4244 }
922dab61
ID		 4245 } else {
4246 /* CEPH_WATCH_EVENT_NOTIFY */
4247 lwork = lwork_alloc(lreq, do_watch_notify);
4248 if (!lwork) {
4249 pr_err("failed to allocate notify-lwork\n");
4250 goto out_unlock_lreq;
a40c4f10 4251 }
a40c4f10 4252
922dab61
ID		 4253 lwork->notify.notify_id = notify_id;
4254 lwork->notify.notifier_id = notifier_id;
4255 lwork->notify.payload = payload;
4256 lwork->notify.payload_len = payload_len;
4257 lwork->notify.msg = ceph_msg_get(msg);
4258 lwork_queue(lwork);
91883cd2 4259 }
a40c4f10 4260
922dab61
ID		 4261out_unlock_lreq:
4262 mutex_unlock(&lreq->lock);
4263out_unlock_osdc:
4264 up_read(&osdc->lock);
a40c4f10
YS		 4265 return;
4266
4267bad:
4268 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 4269}
4270
70636773
AE		 4271/*
4272 * Register request, send initial attempt.
4273 */
4274int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4275 struct ceph_osd_request *req,
4276 bool nofail)
4277{
5aea3dcd
ID		 4278 down_read(&osdc->lock);
4279 submit_request(req, false);
4280 up_read(&osdc->lock);
0bbfdfe8 4281
5aea3dcd 4282 return 0;
f24e9980 4283}
3d14c5d2 4284EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 4285
c9f9b93d 4286/*
c297eb42
ID		 4287 * Unregister a registered request. The request is not completed:
4288 * ->r_result isn't set and __complete_request() isn't called.
c9f9b93d
ID		 4289 */
4290void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4291{
4292 struct ceph_osd_client *osdc = req->r_osdc;
4293
5aea3dcd 4294 down_write(&osdc->lock);
5aea3dcd
ID		 4295 if (req->r_osd)
4296 cancel_request(req);
4297 up_write(&osdc->lock);
c9f9b93d
ID		 4298}
4299EXPORT_SYMBOL(ceph_osdc_cancel_request);
4300
f24e9980 4301/*
42b06965 4302 * @timeout: in jiffies, 0 means "wait forever"
f24e9980 4303 */
42b06965
ID		 4304static int wait_request_timeout(struct ceph_osd_request *req,
4305 unsigned long timeout)
f24e9980 4306{
42b06965 4307 long left;
c9f9b93d 4308
42b06965 4309 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
0e76abf2 4310 left = wait_for_completion_killable_timeout(&req->r_completion,
42b06965
ID		 4311 ceph_timeout_jiffies(timeout));
4312 if (left <= 0) {
4313 left = left ?: -ETIMEDOUT;
c9f9b93d 4314 ceph_osdc_cancel_request(req);
42b06965
ID		 4315 } else {
4316 left = req->r_result; /* completed */
f24e9980
SW		 4317 }
4318
42b06965
ID		 4319 return left;
4320}
4321
4322/*
4323 * wait for a request to complete
4324 */
4325int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4326 struct ceph_osd_request *req)
4327{
4328 return wait_request_timeout(req, 0);
f24e9980 4329}
3d14c5d2 4330EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 4331
4332/*
4333 * sync - wait for all in-flight requests to flush. avoid starvation.
4334 */
4335void ceph_osdc_sync(struct ceph_osd_client *osdc)
4336{
5aea3dcd
ID		 4337 struct rb_node *n, *p;
4338 u64 last_tid = atomic64_read(&osdc->last_tid);
f24e9980 4339
5aea3dcd
ID		 4340again:
4341 down_read(&osdc->lock);
4342 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4343 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4344
4345 mutex_lock(&osd->lock);
4346 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4347 struct ceph_osd_request *req =
4348 rb_entry(p, struct ceph_osd_request, r_node);
4349
4350 if (req->r_tid > last_tid)
4351 break;
4352
4353 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4354 continue;
f24e9980 4355
5aea3dcd
ID		 4356 ceph_osdc_get_request(req);
4357 mutex_unlock(&osd->lock);
4358 up_read(&osdc->lock);
4359 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4360 __func__, req, req->r_tid, last_tid);
b18b9550 4361 wait_for_completion(&req->r_completion);
5aea3dcd
ID		 4362 ceph_osdc_put_request(req);
4363 goto again;
4364 }
f24e9980 4365
5aea3dcd 4366 mutex_unlock(&osd->lock);
f24e9980 4367 }
5aea3dcd
ID		 4368
4369 up_read(&osdc->lock);
4370 dout("%s done last_tid %llu\n", __func__, last_tid);
f24e9980 4371}
3d14c5d2 4372EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 4373
922dab61
ID		 4374static struct ceph_osd_request *
4375alloc_linger_request(struct ceph_osd_linger_request *lreq)
4376{
4377 struct ceph_osd_request *req;
4378
4379 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4380 if (!req)
4381 return NULL;
4382
4383 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4384 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4385
4386 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4387 ceph_osdc_put_request(req);
4388 return NULL;
4389 }
4390
4391 return req;
4392}
4393
4394/*
4395 * Returns a handle, caller owns a ref.
4396 */
4397struct ceph_osd_linger_request *
4398ceph_osdc_watch(struct ceph_osd_client *osdc,
4399 struct ceph_object_id *oid,
4400 struct ceph_object_locator *oloc,
4401 rados_watchcb2_t wcb,
4402 rados_watcherrcb_t errcb,
4403 void *data)
4404{
4405 struct ceph_osd_linger_request *lreq;
4406 int ret;
4407
4408 lreq = linger_alloc(osdc);
4409 if (!lreq)
4410 return ERR_PTR(-ENOMEM);
4411
19079203 4412 lreq->is_watch = true;
922dab61
ID		 4413 lreq->wcb = wcb;
4414 lreq->errcb = errcb;
4415 lreq->data = data;
b07d3c4b 4416 lreq->watch_valid_thru = jiffies;
922dab61
ID		 4417
4418 ceph_oid_copy(&lreq->t.base_oid, oid);
4419 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
54ea0046 4420 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
1134e091 4421 ktime_get_real_ts(&lreq->mtime);
922dab61
ID		 4422
4423 lreq->reg_req = alloc_linger_request(lreq);
4424 if (!lreq->reg_req) {
4425 ret = -ENOMEM;
4426 goto err_put_lreq;
4427 }
4428
4429 lreq->ping_req = alloc_linger_request(lreq);
4430 if (!lreq->ping_req) {
4431 ret = -ENOMEM;
4432 goto err_put_lreq;
4433 }
4434
4435 down_write(&osdc->lock);
4436 linger_register(lreq); /* before osd_req_op_* */
4437 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
4438 CEPH_OSD_WATCH_OP_WATCH);
4439 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
4440 CEPH_OSD_WATCH_OP_PING);
4441 linger_submit(lreq);
4442 up_write(&osdc->lock);
4443
4444 ret = linger_reg_commit_wait(lreq);
4445 if (ret) {
4446 linger_cancel(lreq);
4447 goto err_put_lreq;
4448 }
4449
4450 return lreq;
4451
4452err_put_lreq:
4453 linger_put(lreq);
4454 return ERR_PTR(ret);
4455}
4456EXPORT_SYMBOL(ceph_osdc_watch);
4457
4458/*
4459 * Releases a ref.
4460 *
4461 * Times out after mount_timeout to preserve rbd unmap behaviour
4462 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4463 * with mount_timeout").
4464 */
4465int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4466 struct ceph_osd_linger_request *lreq)
4467{
4468 struct ceph_options *opts = osdc->client->options;
4469 struct ceph_osd_request *req;
4470 int ret;
4471
4472 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4473 if (!req)
4474 return -ENOMEM;
4475
4476 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4477 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
54ea0046 4478 req->r_flags = CEPH_OSD_FLAG_WRITE;
1134e091 4479 ktime_get_real_ts(&req->r_mtime);
922dab61
ID		 4480 osd_req_op_watch_init(req, 0, lreq->linger_id,
4481 CEPH_OSD_WATCH_OP_UNWATCH);
4482
4483 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4484 if (ret)
4485 goto out_put_req;
4486
4487 ceph_osdc_start_request(osdc, req, false);
4488 linger_cancel(lreq);
4489 linger_put(lreq);
4490 ret = wait_request_timeout(req, opts->mount_timeout);
4491
4492out_put_req:
4493 ceph_osdc_put_request(req);
4494 return ret;
4495}
4496EXPORT_SYMBOL(ceph_osdc_unwatch);
4497
4498static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4499 u64 notify_id, u64 cookie, void *payload,
4500 size_t payload_len)
4501{
4502 struct ceph_osd_req_op *op;
4503 struct ceph_pagelist *pl;
4504 int ret;
4505
4506 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4507
4508 pl = kmalloc(sizeof(*pl), GFP_NOIO);
4509 if (!pl)
4510 return -ENOMEM;
4511
4512 ceph_pagelist_init(pl);
4513 ret = ceph_pagelist_encode_64(pl, notify_id);
4514 ret |= ceph_pagelist_encode_64(pl, cookie);
4515 if (payload) {
4516 ret |= ceph_pagelist_encode_32(pl, payload_len);
4517 ret |= ceph_pagelist_append(pl, payload, payload_len);
4518 } else {
4519 ret |= ceph_pagelist_encode_32(pl, 0);
4520 }
4521 if (ret) {
4522 ceph_pagelist_release(pl);
4523 return -ENOMEM;
4524 }
4525
4526 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4527 op->indata_len = pl->length;
4528 return 0;
4529}
4530
4531int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4532 struct ceph_object_id *oid,
4533 struct ceph_object_locator *oloc,
4534 u64 notify_id,
4535 u64 cookie,
4536 void *payload,
4537 size_t payload_len)
4538{
4539 struct ceph_osd_request *req;
4540 int ret;
4541
4542 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4543 if (!req)
4544 return -ENOMEM;
4545
4546 ceph_oid_copy(&req->r_base_oid, oid);
4547 ceph_oloc_copy(&req->r_base_oloc, oloc);
4548 req->r_flags = CEPH_OSD_FLAG_READ;
4549
4550 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4551 if (ret)
4552 goto out_put_req;
4553
4554 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4555 payload_len);
4556 if (ret)
4557 goto out_put_req;
4558
4559 ceph_osdc_start_request(osdc, req, false);
4560 ret = ceph_osdc_wait_request(osdc, req);
4561
4562out_put_req:
4563 ceph_osdc_put_request(req);
4564 return ret;
4565}
4566EXPORT_SYMBOL(ceph_osdc_notify_ack);
4567
19079203
ID		 4568static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4569 u64 cookie, u32 prot_ver, u32 timeout,
4570 void *payload, size_t payload_len)
4571{
4572 struct ceph_osd_req_op *op;
4573 struct ceph_pagelist *pl;
4574 int ret;
4575
4576 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4577 op->notify.cookie = cookie;
4578
4579 pl = kmalloc(sizeof(*pl), GFP_NOIO);
4580 if (!pl)
4581 return -ENOMEM;
4582
4583 ceph_pagelist_init(pl);
4584 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4585 ret |= ceph_pagelist_encode_32(pl, timeout);
4586 ret |= ceph_pagelist_encode_32(pl, payload_len);
4587 ret |= ceph_pagelist_append(pl, payload, payload_len);
4588 if (ret) {
4589 ceph_pagelist_release(pl);
4590 return -ENOMEM;
4591 }
4592
4593 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4594 op->indata_len = pl->length;
4595 return 0;
4596}
4597
4598/*
4599 * @timeout: in seconds
4600 *
4601 * @preply_{pages,len} are initialized both on success and error.
4602 * The caller is responsible for:
4603 *
4604 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4605 */
4606int ceph_osdc_notify(struct ceph_osd_client *osdc,
4607 struct ceph_object_id *oid,
4608 struct ceph_object_locator *oloc,
4609 void *payload,
4610 size_t payload_len,
4611 u32 timeout,
4612 struct page ***preply_pages,
4613 size_t *preply_len)
4614{
4615 struct ceph_osd_linger_request *lreq;
4616 struct page **pages;
4617 int ret;
4618
4619 WARN_ON(!timeout);
4620 if (preply_pages) {
4621 *preply_pages = NULL;
4622 *preply_len = 0;
4623 }
4624
4625 lreq = linger_alloc(osdc);
4626 if (!lreq)
4627 return -ENOMEM;
4628
4629 lreq->preply_pages = preply_pages;
4630 lreq->preply_len = preply_len;
4631
4632 ceph_oid_copy(&lreq->t.base_oid, oid);
4633 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4634 lreq->t.flags = CEPH_OSD_FLAG_READ;
4635
4636 lreq->reg_req = alloc_linger_request(lreq);
4637 if (!lreq->reg_req) {
4638 ret = -ENOMEM;
4639 goto out_put_lreq;
4640 }
4641
4642 /* for notify_id */
4643 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4644 if (IS_ERR(pages)) {
4645 ret = PTR_ERR(pages);
4646 goto out_put_lreq;
4647 }
4648
4649 down_write(&osdc->lock);
4650 linger_register(lreq); /* before osd_req_op_* */
4651 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
4652 timeout, payload, payload_len);
4653 if (ret) {
4654 linger_unregister(lreq);
4655 up_write(&osdc->lock);
4656 ceph_release_page_vector(pages, 1);
4657 goto out_put_lreq;
4658 }
4659 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4660 response_data),
4661 pages, PAGE_SIZE, 0, false, true);
4662 linger_submit(lreq);
4663 up_write(&osdc->lock);
4664
4665 ret = linger_reg_commit_wait(lreq);
4666 if (!ret)
4667 ret = linger_notify_finish_wait(lreq);
4668 else
4669 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4670
4671 linger_cancel(lreq);
4672out_put_lreq:
4673 linger_put(lreq);
4674 return ret;
4675}
4676EXPORT_SYMBOL(ceph_osdc_notify);
4677
b07d3c4b
ID		 4678/*
4679 * Return the number of milliseconds since the watch was last
4680 * confirmed, or an error. If there is an error, the watch is no
4681 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4682 */
4683int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4684 struct ceph_osd_linger_request *lreq)
4685{
4686 unsigned long stamp, age;
4687 int ret;
4688
4689 down_read(&osdc->lock);
4690 mutex_lock(&lreq->lock);
4691 stamp = lreq->watch_valid_thru;
4692 if (!list_empty(&lreq->pending_lworks)) {
4693 struct linger_work *lwork =
4694 list_first_entry(&lreq->pending_lworks,
4695 struct linger_work,
4696 pending_item);
4697
4698 if (time_before(lwork->queued_stamp, stamp))
4699 stamp = lwork->queued_stamp;
4700 }
4701 age = jiffies - stamp;
4702 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4703 lreq, lreq->linger_id, age, lreq->last_error);
4704 /* we are truncating to msecs, so return a safe upper bound */
4705 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4706
4707 mutex_unlock(&lreq->lock);
4708 up_read(&osdc->lock);
4709 return ret;
4710}
4711
a4ed38d7
DF		 4712static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4713{
4714 u8 struct_v;
4715 u32 struct_len;
4716 int ret;
4717
4718 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4719 &struct_v, &struct_len);
4720 if (ret)
4721 return ret;
4722
4723 ceph_decode_copy(p, &item->name, sizeof(item->name));
4724 item->cookie = ceph_decode_64(p);
4725 *p += 4; /* skip timeout_seconds */
4726 if (struct_v >= 2) {
4727 ceph_decode_copy(p, &item->addr, sizeof(item->addr));
4728 ceph_decode_addr(&item->addr);
4729 }
4730
4731 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4732 ENTITY_NAME(item->name), item->cookie,
4733 ceph_pr_addr(&item->addr.in_addr));
4734 return 0;
4735}
4736
4737static int decode_watchers(void **p, void *end,
4738 struct ceph_watch_item **watchers,
4739 u32 *num_watchers)
4740{
4741 u8 struct_v;
4742 u32 struct_len;
4743 int i;
4744 int ret;
4745
4746 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4747 &struct_v, &struct_len);
4748 if (ret)
4749 return ret;
4750
4751 *num_watchers = ceph_decode_32(p);
4752 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4753 if (!*watchers)
4754 return -ENOMEM;
4755
4756 for (i = 0; i < *num_watchers; i++) {
4757 ret = decode_watcher(p, end, *watchers + i);
4758 if (ret) {
4759 kfree(*watchers);
4760 return ret;
4761 }
4762 }
4763
4764 return 0;
4765}
4766
4767/*
4768 * On success, the caller is responsible for:
4769 *
4770 * kfree(watchers);
4771 */
4772int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
4773 struct ceph_object_id *oid,
4774 struct ceph_object_locator *oloc,
4775 struct ceph_watch_item **watchers,
4776 u32 *num_watchers)
4777{
4778 struct ceph_osd_request *req;
4779 struct page **pages;
4780 int ret;
4781
4782 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4783 if (!req)
4784 return -ENOMEM;
4785
4786 ceph_oid_copy(&req->r_base_oid, oid);
4787 ceph_oloc_copy(&req->r_base_oloc, oloc);
4788 req->r_flags = CEPH_OSD_FLAG_READ;
4789
4790 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4791 if (ret)
4792 goto out_put_req;
4793
4794 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4795 if (IS_ERR(pages)) {
4796 ret = PTR_ERR(pages);
4797 goto out_put_req;
4798 }
4799
4800 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
4801 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
4802 response_data),
4803 pages, PAGE_SIZE, 0, false, true);
4804
4805 ceph_osdc_start_request(osdc, req, false);
4806 ret = ceph_osdc_wait_request(osdc, req);
4807 if (ret >= 0) {
4808 void *p = page_address(pages[0]);
4809 void *const end = p + req->r_ops[0].outdata_len;
4810
4811 ret = decode_watchers(&p, end, watchers, num_watchers);
4812 }
4813
4814out_put_req:
4815 ceph_osdc_put_request(req);
4816 return ret;
4817}
4818EXPORT_SYMBOL(ceph_osdc_list_watchers);
4819
dd935f44
JD		 4820/*
4821 * Call all pending notify callbacks - for use after a watch is
4822 * unregistered, to make sure no more callbacks for it will be invoked
4823 */
f6479449 4824void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44 4825{
99d16943 4826 dout("%s osdc %p\n", __func__, osdc);
dd935f44
JD		 4827 flush_workqueue(osdc->notify_wq);
4828}
4829EXPORT_SYMBOL(ceph_osdc_flush_notifies);
4830
7cca78c9
ID		 4831void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
4832{
4833 down_read(&osdc->lock);
4834 maybe_request_map(osdc);
4835 up_read(&osdc->lock);
4836}
4837EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
dd935f44 4838
428a7158
DF		 4839/*
4840 * Execute an OSD class method on an object.
4841 *
4842 * @flags: CEPH_OSD_FLAG_*
2544a020 4843 * @resp_len: in/out param for reply length
428a7158
DF		 4844 */
4845int ceph_osdc_call(struct ceph_osd_client *osdc,
4846 struct ceph_object_id *oid,
4847 struct ceph_object_locator *oloc,
4848 const char *class, const char *method,
4849 unsigned int flags,
4850 struct page *req_page, size_t req_len,
4851 struct page *resp_page, size_t *resp_len)
4852{
4853 struct ceph_osd_request *req;
4854 int ret;
4855
2544a020
ID		 4856 if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE))
4857 return -E2BIG;
4858
428a7158
DF		 4859 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4860 if (!req)
4861 return -ENOMEM;
4862
4863 ceph_oid_copy(&req->r_base_oid, oid);
4864 ceph_oloc_copy(&req->r_base_oloc, oloc);
4865 req->r_flags = flags;
4866
4867 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4868 if (ret)
4869 goto out_put_req;
4870
4871 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
4872 if (req_page)
4873 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
4874 0, false, false);
4875 if (resp_page)
4876 osd_req_op_cls_response_data_pages(req, 0, &resp_page,
2544a020 4877 *resp_len, 0, false, false);
428a7158
DF		 4878
4879 ceph_osdc_start_request(osdc, req, false);
4880 ret = ceph_osdc_wait_request(osdc, req);
4881 if (ret >= 0) {
4882 ret = req->r_ops[0].rval;
4883 if (resp_page)
4884 *resp_len = req->r_ops[0].outdata_len;
4885 }
4886
4887out_put_req:
4888 ceph_osdc_put_request(req);
4889 return ret;
4890}
4891EXPORT_SYMBOL(ceph_osdc_call);
4892
f24e9980
SW		 4893/*
4894 * init, shutdown
4895 */
4896int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
4897{
4898 int err;
4899
4900 dout("init\n");
4901 osdc->client = client;
5aea3dcd 4902 init_rwsem(&osdc->lock);
f24e9980 4903 osdc->osds = RB_ROOT;
f5a2041b 4904 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 4905 spin_lock_init(&osdc->osd_lru_lock);
5aea3dcd
ID		 4906 osd_init(&osdc->homeless_osd);
4907 osdc->homeless_osd.o_osdc = osdc;
4908 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
264048af 4909 osdc->last_linger_id = CEPH_LINGER_ID_START;
922dab61 4910 osdc->linger_requests = RB_ROOT;
4609245e
ID		 4911 osdc->map_checks = RB_ROOT;
4912 osdc->linger_map_checks = RB_ROOT;
f24e9980 4913 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b
YS		 4914 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
4915
5f44f142 4916 err = -ENOMEM;
e5253a7b
ID		 4917 osdc->osdmap = ceph_osdmap_alloc();
4918 if (!osdc->osdmap)
4919 goto out;
4920
9e767adb
ID		 4921 osdc->req_mempool = mempool_create_slab_pool(10,
4922 ceph_osd_request_cache);
f24e9980 4923 if (!osdc->req_mempool)
e5253a7b 4924 goto out_map;
f24e9980 4925
d50b409f 4926 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
711da55d 4927 PAGE_SIZE, 10, true, "osd_op");
f24e9980 4928 if (err < 0)
5f44f142 4929 goto out_mempool;
d50b409f 4930 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
711da55d 4931 PAGE_SIZE, 10, true, "osd_op_reply");
c16e7869
SW		 4932 if (err < 0)
4933 goto out_msgpool;
a40c4f10 4934
dbcae088 4935 err = -ENOMEM;
a40c4f10 4936 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 4937 if (!osdc->notify_wq)
c172ec5c
ID		 4938 goto out_msgpool_reply;
4939
fbca9635
ID		 4940 schedule_delayed_work(&osdc->timeout_work,
4941 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 4942 schedule_delayed_work(&osdc->osds_timeout_work,
4943 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
4944
f24e9980 4945 return 0;
5f44f142 4946
c172ec5c
ID		 4947out_msgpool_reply:
4948 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 4949out_msgpool:
4950 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 4951out_mempool:
4952 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 4953out_map:
4954 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 4955out:
4956 return err;
f24e9980
SW		 4957}
4958
4959void ceph_osdc_stop(struct ceph_osd_client *osdc)
4960{
a40c4f10
YS		 4961 flush_workqueue(osdc->notify_wq);
4962 destroy_workqueue(osdc->notify_wq);
f24e9980 4963 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 4964 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f 4965
5aea3dcd 4966 down_write(&osdc->lock);
42a2c09f
ID		 4967 while (!RB_EMPTY_ROOT(&osdc->osds)) {
4968 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
4969 struct ceph_osd, o_node);
5aea3dcd 4970 close_osd(osd);
42a2c09f 4971 }
5aea3dcd 4972 up_write(&osdc->lock);
02113a0f 4973 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5aea3dcd
ID		 4974 osd_cleanup(&osdc->homeless_osd);
4975
4976 WARN_ON(!list_empty(&osdc->osd_lru));
922dab61 4977 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4609245e
ID		 4978 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
4979 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5aea3dcd
ID		 4980 WARN_ON(atomic_read(&osdc->num_requests));
4981 WARN_ON(atomic_read(&osdc->num_homeless));
42a2c09f 4982
e5253a7b 4983 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 4984 mempool_destroy(osdc->req_mempool);
4985 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 4986 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 4987}
4988
4989/*
4990 * Read some contiguous pages. If we cross a stripe boundary, shorten
4991 * *plen. Return number of bytes read, or error.
4992 */
4993int ceph_osdc_readpages(struct ceph_osd_client *osdc,
4994 struct ceph_vino vino, struct ceph_file_layout *layout,
4995 u64 off, u64 *plen,
4996 u32 truncate_seq, u64 truncate_size,
b7495fc2 4997 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 4998{
4999 struct ceph_osd_request *req;
5000 int rc = 0;
5001
5002 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
5003 vino.snap, off, *plen);
715e4cd4 5004 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 5005 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 5006 NULL, truncate_seq, truncate_size,
153e5167 5007 false);
6816282d
SW		 5008 if (IS_ERR(req))
5009 return PTR_ERR(req);
f24e9980
SW		 5010
5011 /* it may be a short read due to an object boundary */
406e2c9f 5012 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 5013 pages, *plen, page_align, false, false);
f24e9980 5014
e0c59487 5015 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 5016 off, *plen, *plen, page_align);
f24e9980
SW		 5017
5018 rc = ceph_osdc_start_request(osdc, req, false);
5019 if (!rc)
5020 rc = ceph_osdc_wait_request(osdc, req);
5021
5022 ceph_osdc_put_request(req);
5023 dout("readpages result %d\n", rc);
5024 return rc;
5025}
3d14c5d2 5026EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 5027
5028/*
5029 * do a synchronous write on N pages
5030 */
5031int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
5032 struct ceph_file_layout *layout,
5033 struct ceph_snap_context *snapc,
5034 u64 off, u64 len,
5035 u32 truncate_seq, u64 truncate_size,
5036 struct timespec *mtime,
24808826 5037 struct page **pages, int num_pages)
f24e9980
SW		 5038{
5039 struct ceph_osd_request *req;
5040 int rc = 0;
b7495fc2 5041 int page_align = off & ~PAGE_MASK;
f24e9980 5042
715e4cd4 5043 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
54ea0046 5044 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
acead002 5045 snapc, truncate_seq, truncate_size,
153e5167 5046 true);
6816282d
SW		 5047 if (IS_ERR(req))
5048 return PTR_ERR(req);
f24e9980
SW		 5049
5050 /* it may be a short write due to an object boundary */
406e2c9f 5051 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 5052 false, false);
5053 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 5054
bb873b53 5055 req->r_mtime = *mtime;
87f979d3 5056 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 5057 if (!rc)
5058 rc = ceph_osdc_wait_request(osdc, req);
5059
5060 ceph_osdc_put_request(req);
5061 if (rc == 0)
5062 rc = len;
5063 dout("writepages result %d\n", rc);
5064 return rc;
5065}
3d14c5d2 5066EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 5067
5522ae0b
AE		 5068int ceph_osdc_setup(void)
5069{
3f1af42a
ID		 5070 size_t size = sizeof(struct ceph_osd_request) +
5071 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5072
5522ae0b 5073 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 5074 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5075 0, 0, NULL);
5522ae0b
AE		 5076
5077 return ceph_osd_request_cache ? 0 : -ENOMEM;
5078}
5079EXPORT_SYMBOL(ceph_osdc_setup);
5080
5081void ceph_osdc_cleanup(void)
5082{
5083 BUG_ON(!ceph_osd_request_cache);
5084 kmem_cache_destroy(ceph_osd_request_cache);
5085 ceph_osd_request_cache = NULL;
5086}
5087EXPORT_SYMBOL(ceph_osdc_cleanup);
5088
f24e9980
SW		 5089/*
5090 * handle incoming message
5091 */
5092static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5093{
5094 struct ceph_osd *osd = con->private;
5aea3dcd 5095 struct ceph_osd_client *osdc = osd->o_osdc;
f24e9980
SW		 5096 int type = le16_to_cpu(msg->hdr.type);
5097
f24e9980
SW		 5098 switch (type) {
5099 case CEPH_MSG_OSD_MAP:
5100 ceph_osdc_handle_map(osdc, msg);
5101 break;
5102 case CEPH_MSG_OSD_OPREPLY:
5aea3dcd 5103 handle_reply(osd, msg);
f24e9980 5104 break;
a02a946d
ID		 5105 case CEPH_MSG_OSD_BACKOFF:
5106 handle_backoff(osd, msg);
5107 break;
a40c4f10
YS		 5108 case CEPH_MSG_WATCH_NOTIFY:
5109 handle_watch_notify(osdc, msg);
5110 break;
f24e9980
SW		 5111
5112 default:
5113 pr_err("received unknown message type %d %s\n", type,
5114 ceph_msg_type_name(type));
5115 }
5aea3dcd 5116
f24e9980
SW		 5117 ceph_msg_put(msg);
5118}
5119
5b3a4db3 5120/*
d15f9d69
ID		 5121 * Lookup and return message for incoming reply. Don't try to do
5122 * anything about a larger than preallocated data portion of the
5123 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 5124 */
5125static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 5126 struct ceph_msg_header *hdr,
5127 int *skip)
f24e9980
SW		 5128{
5129 struct ceph_osd *osd = con->private;
5130 struct ceph_osd_client *osdc = osd->o_osdc;
5aea3dcd 5131 struct ceph_msg *m = NULL;
0547a9b3 5132 struct ceph_osd_request *req;
3f0a4ac5 5133 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 5134 int data_len = le32_to_cpu(hdr->data_len);
5aea3dcd 5135 u64 tid = le64_to_cpu(hdr->tid);
f24e9980 5136
5aea3dcd
ID		 5137 down_read(&osdc->lock);
5138 if (!osd_registered(osd)) {
5139 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5140 *skip = 1;
5141 goto out_unlock_osdc;
5142 }
5143 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5144
5145 mutex_lock(&osd->lock);
5146 req = lookup_request(&osd->o_requests, tid);
0547a9b3 5147 if (!req) {
cd8140c6
ID		 5148 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5149 osd->o_osd, tid);
d15f9d69 5150 *skip = 1;
5aea3dcd 5151 goto out_unlock_session;
0547a9b3 5152 }
c16e7869 5153
ace6d3a9 5154 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 5155
f2be82b0 5156 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 5157 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5158 __func__, osd->o_osd, req->r_tid, front_len,
5159 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 5160 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5161 false);
a79832f2 5162 if (!m)
5aea3dcd 5163 goto out_unlock_session;
c16e7869
SW		 5164 ceph_msg_put(req->r_reply);
5165 req->r_reply = m;
5166 }
0fff87ec 5167
d15f9d69
ID		 5168 if (data_len > req->r_reply->data_length) {
5169 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5170 __func__, osd->o_osd, req->r_tid, data_len,
5171 req->r_reply->data_length);
5172 m = NULL;
5173 *skip = 1;
5aea3dcd 5174 goto out_unlock_session;
0547a9b3 5175 }
d15f9d69
ID		 5176
5177 m = ceph_msg_get(req->r_reply);
c16e7869 5178 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3 5179
5aea3dcd
ID		 5180out_unlock_session:
5181 mutex_unlock(&osd->lock);
5182out_unlock_osdc:
5183 up_read(&osdc->lock);
2450418c 5184 return m;
5b3a4db3
SW		 5185}
5186
19079203
ID		 5187/*
5188 * TODO: switch to a msg-owned pagelist
5189 */
5190static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5191{
5192 struct ceph_msg *m;
5193 int type = le16_to_cpu(hdr->type);
5194 u32 front_len = le32_to_cpu(hdr->front_len);
5195 u32 data_len = le32_to_cpu(hdr->data_len);
5196
5197 m = ceph_msg_new(type, front_len, GFP_NOIO, false);
5198 if (!m)
5199 return NULL;
5200
5201 if (data_len) {
5202 struct page **pages;
5203 struct ceph_osd_data osd_data;
5204
5205 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5206 GFP_NOIO);
c22e853a 5207 if (IS_ERR(pages)) {
19079203
ID		 5208 ceph_msg_put(m);
5209 return NULL;
5210 }
5211
5212 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
5213 false);
5214 ceph_osdc_msg_data_add(m, &osd_data);
5215 }
5216
5217 return m;
5218}
5219
5b3a4db3
SW		 5220static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5221 struct ceph_msg_header *hdr,
5222 int *skip)
5223{
5224 struct ceph_osd *osd = con->private;
5225 int type = le16_to_cpu(hdr->type);
5b3a4db3 5226
1c20f2d2 5227 *skip = 0;
5b3a4db3
SW		 5228 switch (type) {
5229 case CEPH_MSG_OSD_MAP:
a02a946d 5230 case CEPH_MSG_OSD_BACKOFF:
a40c4f10 5231 case CEPH_MSG_WATCH_NOTIFY:
19079203 5232 return alloc_msg_with_page_vector(hdr);
5b3a4db3
SW		 5233 case CEPH_MSG_OSD_OPREPLY:
5234 return get_reply(con, hdr, skip);
5235 default:
5aea3dcd
ID		 5236 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5237 osd->o_osd, type);
5b3a4db3
SW		 5238 *skip = 1;
5239 return NULL;
5240 }
f24e9980
SW		 5241}
5242
5243/*
5244 * Wrappers to refcount containing ceph_osd struct
5245 */
5246static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5247{
5248 struct ceph_osd *osd = con->private;
5249 if (get_osd(osd))
5250 return con;
5251 return NULL;
5252}
5253
5254static void put_osd_con(struct ceph_connection *con)
5255{
5256 struct ceph_osd *osd = con->private;
5257 put_osd(osd);
5258}
5259
4e7a5dcd
SW		 5260/*
5261 * authentication
5262 */
a3530df3
AE		 5263/*
5264 * Note: returned pointer is the address of a structure that's
5265 * managed separately. Caller must *not* attempt to free it.
5266 */
5267static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 5268 int *proto, int force_new)
4e7a5dcd
SW		 5269{
5270 struct ceph_osd *o = con->private;
5271 struct ceph_osd_client *osdc = o->o_osdc;
5272 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 5273 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 5274
74f1869f 5275 if (force_new && auth->authorizer) {
6c1ea260 5276 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 5277 auth->authorizer = NULL;
5278 }
27859f97
SW		 5279 if (!auth->authorizer) {
5280 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5281 auth);
4e7a5dcd 5282 if (ret)
a3530df3 5283 return ERR_PTR(ret);
27859f97
SW		 5284 } else {
5285 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 5286 auth);
5287 if (ret)
5288 return ERR_PTR(ret);
4e7a5dcd 5289 }
4e7a5dcd 5290 *proto = ac->protocol;
74f1869f 5291
a3530df3 5292 return auth;
4e7a5dcd
SW		 5293}
5294
5295
0dde5848 5296static int verify_authorizer_reply(struct ceph_connection *con)
4e7a5dcd
SW		 5297{
5298 struct ceph_osd *o = con->private;
5299 struct ceph_osd_client *osdc = o->o_osdc;
5300 struct ceph_auth_client *ac = osdc->client->monc.auth;
5301
0dde5848 5302 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
4e7a5dcd
SW		 5303}
5304
9bd2e6f8
SW		 5305static int invalidate_authorizer(struct ceph_connection *con)
5306{
5307 struct ceph_osd *o = con->private;
5308 struct ceph_osd_client *osdc = o->o_osdc;
5309 struct ceph_auth_client *ac = osdc->client->monc.auth;
5310
27859f97 5311 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 5312 return ceph_monc_validate_auth(&osdc->client->monc);
5313}
4e7a5dcd 5314
8cb441c0
ID		 5315static void osd_reencode_message(struct ceph_msg *msg)
5316{
914902af
ID		 5317 int type = le16_to_cpu(msg->hdr.type);
5318
5319 if (type == CEPH_MSG_OSD_OP)
5320 encode_request_finish(msg);
8cb441c0
ID		 5321}
5322
79dbd1ba 5323static int osd_sign_message(struct ceph_msg *msg)
33d07337 5324{
79dbd1ba 5325 struct ceph_osd *o = msg->con->private;
33d07337 5326 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5327
33d07337
YZ		 5328 return ceph_auth_sign_message(auth, msg);
5329}
5330
79dbd1ba 5331static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 5332{
79dbd1ba 5333 struct ceph_osd *o = msg->con->private;
33d07337 5334 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5335
33d07337
YZ		 5336 return ceph_auth_check_message_signature(auth, msg);
5337}
5338
9e32789f 5339static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 5340 .get = get_osd_con,
5341 .put = put_osd_con,
5342 .dispatch = dispatch,
4e7a5dcd
SW		 5343 .get_authorizer = get_authorizer,
5344 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 5345 .invalidate_authorizer = invalidate_authorizer,
f24e9980 5346 .alloc_msg = alloc_msg,
8cb441c0 5347 .reencode_message = osd_reencode_message,
79dbd1ba
ID		 5348 .sign_message = osd_sign_message,
5349 .check_message_signature = osd_check_message_signature,
5aea3dcd 5350 .fault = osd_fault,
f24e9980 5351};
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