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[linux.git] / net / ceph / osd_client.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
a4ce40a9 2
3d14c5d2 3#include <linux/ceph/ceph_debug.h>
f24e9980 4
3d14c5d2 5#include <linux/module.h>
f24e9980
SW		 6#include <linux/err.h>
7#include <linux/highmem.h>
8#include <linux/mm.h>
9#include <linux/pagemap.h>
10#include <linux/slab.h>
11#include <linux/uaccess.h>
68b4476b
YS		 12#ifdef CONFIG_BLOCK
13#include <linux/bio.h>
14#endif
f24e9980 15
8cb441c0 16#include <linux/ceph/ceph_features.h>
3d14c5d2
YS		 17#include <linux/ceph/libceph.h>
18#include <linux/ceph/osd_client.h>
19#include <linux/ceph/messenger.h>
20#include <linux/ceph/decode.h>
21#include <linux/ceph/auth.h>
22#include <linux/ceph/pagelist.h>
08c1ac50 23#include <linux/ceph/striper.h>
f24e9980 24
c16e7869 25#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 26
5522ae0b
AE		 27static struct kmem_cache *ceph_osd_request_cache;
28
9e32789f 29static const struct ceph_connection_operations osd_con_ops;
f24e9980 30
f24e9980
SW		 31/*
32 * Implement client access to distributed object storage cluster.
33 *
34 * All data objects are stored within a cluster/cloud of OSDs, or
35 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
36 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
37 * remote daemons serving up and coordinating consistent and safe
38 * access to storage.
39 *
40 * Cluster membership and the mapping of data objects onto storage devices
41 * are described by the osd map.
42 *
43 * We keep track of pending OSD requests (read, write), resubmit
44 * requests to different OSDs when the cluster topology/data layout
45 * change, or retry the affected requests when the communications
46 * channel with an OSD is reset.
47 */
48
5aea3dcd
ID		 49static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
50static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
922dab61
ID		 51static void link_linger(struct ceph_osd *osd,
52 struct ceph_osd_linger_request *lreq);
53static void unlink_linger(struct ceph_osd *osd,
54 struct ceph_osd_linger_request *lreq);
a02a946d 55static void clear_backoffs(struct ceph_osd *osd);
5aea3dcd
ID		 56
57#if 1
58static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
59{
60 bool wrlocked = true;
61
62 if (unlikely(down_read_trylock(sem))) {
63 wrlocked = false;
64 up_read(sem);
65 }
66
67 return wrlocked;
68}
69static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
70{
71 WARN_ON(!rwsem_is_locked(&osdc->lock));
72}
73static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
74{
75 WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
76}
77static inline void verify_osd_locked(struct ceph_osd *osd)
78{
79 struct ceph_osd_client *osdc = osd->o_osdc;
80
81 WARN_ON(!(mutex_is_locked(&osd->lock) &&
82 rwsem_is_locked(&osdc->lock)) &&
83 !rwsem_is_wrlocked(&osdc->lock));
84}
922dab61
ID		 85static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
86{
87 WARN_ON(!mutex_is_locked(&lreq->lock));
88}
5aea3dcd
ID		 89#else
90static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
91static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
92static inline void verify_osd_locked(struct ceph_osd *osd) { }
922dab61 93static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
5aea3dcd
ID		 94#endif
95
f24e9980
SW		 96/*
97 * calculate the mapping of a file extent onto an object, and fill out the
98 * request accordingly. shorten extent as necessary if it crosses an
99 * object boundary.
100 *
101 * fill osd op in request message.
102 */
dbe0fc41 103static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 104 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 105{
60e56f13 106 u64 orig_len = *plen;
dccbf080 107 u32 xlen;
f24e9980 108
60e56f13 109 /* object extent? */
dccbf080
ID		 110 ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
111 objoff, &xlen);
112 *objlen = xlen;
75d1c941
AE		 113 if (*objlen < orig_len) {
114 *plen = *objlen;
60e56f13
AE		 115 dout(" skipping last %llu, final file extent %llu~%llu\n",
116 orig_len - *plen, off, *plen);
117 }
118
75d1c941 119 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
3ff5f385 120 return 0;
f24e9980
SW		 121}
122
c54d47bf
AE		 123static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
124{
125 memset(osd_data, 0, sizeof (*osd_data));
126 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
127}
128
a4ce40a9 129static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 130 struct page **pages, u64 length, u32 alignment,
131 bool pages_from_pool, bool own_pages)
132{
133 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
134 osd_data->pages = pages;
135 osd_data->length = length;
136 osd_data->alignment = alignment;
137 osd_data->pages_from_pool = pages_from_pool;
138 osd_data->own_pages = own_pages;
139}
43bfe5de 140
a4ce40a9 141static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 142 struct ceph_pagelist *pagelist)
143{
144 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
145 osd_data->pagelist = pagelist;
146}
43bfe5de
AE		 147
148#ifdef CONFIG_BLOCK
a4ce40a9 149static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
5359a17d
ID		 150 struct ceph_bio_iter *bio_pos,
151 u32 bio_length)
43bfe5de
AE		 152{
153 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
5359a17d 154 osd_data->bio_pos = *bio_pos;
43bfe5de
AE		 155 osd_data->bio_length = bio_length;
156}
43bfe5de
AE		 157#endif /* CONFIG_BLOCK */
158
b9e281c2 159static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
0010f705
ID		 160 struct ceph_bvec_iter *bvec_pos,
161 u32 num_bvecs)
b9e281c2
ID		 162{
163 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
164 osd_data->bvec_pos = *bvec_pos;
0010f705 165 osd_data->num_bvecs = num_bvecs;
b9e281c2
ID		 166}
167
8a703a38
IC		 168#define osd_req_op_data(oreq, whch, typ, fld) \
169({ \
170 struct ceph_osd_request *__oreq = (oreq); \
171 unsigned int __whch = (whch); \
172 BUG_ON(__whch >= __oreq->r_num_ops); \
173 &__oreq->r_ops[__whch].typ.fld; \
174})
863c7eb5 175
49719778
AE		 176static struct ceph_osd_data *
177osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
178{
179 BUG_ON(which >= osd_req->r_num_ops);
180
181 return &osd_req->r_ops[which].raw_data_in;
182}
183
a4ce40a9
AE		 184struct ceph_osd_data *
185osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 186 unsigned int which)
a4ce40a9 187{
863c7eb5 188 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 189}
190EXPORT_SYMBOL(osd_req_op_extent_osd_data);
191
49719778
AE		 192void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
193 unsigned int which, struct page **pages,
194 u64 length, u32 alignment,
195 bool pages_from_pool, bool own_pages)
196{
197 struct ceph_osd_data *osd_data;
198
199 osd_data = osd_req_op_raw_data_in(osd_req, which);
200 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
201 pages_from_pool, own_pages);
202}
203EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
204
a4ce40a9 205void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 206 unsigned int which, struct page **pages,
207 u64 length, u32 alignment,
a4ce40a9
AE		 208 bool pages_from_pool, bool own_pages)
209{
210 struct ceph_osd_data *osd_data;
211
863c7eb5 212 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 213 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
214 pages_from_pool, own_pages);
a4ce40a9
AE		 215}
216EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
217
218void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 219 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 220{
221 struct ceph_osd_data *osd_data;
222
863c7eb5 223 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 224 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 225}
226EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
227
228#ifdef CONFIG_BLOCK
229void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
5359a17d
ID		 230 unsigned int which,
231 struct ceph_bio_iter *bio_pos,
232 u32 bio_length)
a4ce40a9
AE		 233{
234 struct ceph_osd_data *osd_data;
863c7eb5
AE		 235
236 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
5359a17d 237 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
a4ce40a9
AE		 238}
239EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
240#endif /* CONFIG_BLOCK */
241
0010f705
ID		 242void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
243 unsigned int which,
244 struct bio_vec *bvecs, u32 num_bvecs,
245 u32 bytes)
246{
247 struct ceph_osd_data *osd_data;
248 struct ceph_bvec_iter it = {
249 .bvecs = bvecs,
250 .iter = { .bi_size = bytes },
251 };
252
253 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
254 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
255}
256EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
257
b9e281c2
ID		 258void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
259 unsigned int which,
260 struct ceph_bvec_iter *bvec_pos)
261{
262 struct ceph_osd_data *osd_data;
263
264 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
0010f705 265 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
b9e281c2
ID		 266}
267EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
268
a4ce40a9
AE		 269static void osd_req_op_cls_request_info_pagelist(
270 struct ceph_osd_request *osd_req,
271 unsigned int which, struct ceph_pagelist *pagelist)
272{
273 struct ceph_osd_data *osd_data;
274
863c7eb5 275 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 276 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 277}
278
04017e29
AE		 279void osd_req_op_cls_request_data_pagelist(
280 struct ceph_osd_request *osd_req,
281 unsigned int which, struct ceph_pagelist *pagelist)
282{
283 struct ceph_osd_data *osd_data;
284
863c7eb5 285 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29 286 ceph_osd_data_pagelist_init(osd_data, pagelist);
bb873b53
ID		 287 osd_req->r_ops[which].cls.indata_len += pagelist->length;
288 osd_req->r_ops[which].indata_len += pagelist->length;
04017e29
AE		 289}
290EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
291
6c57b554
AE		 292void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
293 unsigned int which, struct page **pages, u64 length,
294 u32 alignment, bool pages_from_pool, bool own_pages)
295{
296 struct ceph_osd_data *osd_data;
297
298 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
299 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
300 pages_from_pool, own_pages);
bb873b53
ID		 301 osd_req->r_ops[which].cls.indata_len += length;
302 osd_req->r_ops[which].indata_len += length;
6c57b554
AE		 303}
304EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
305
b9e281c2
ID		 306void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
307 unsigned int which,
0010f705
ID		 308 struct bio_vec *bvecs, u32 num_bvecs,
309 u32 bytes)
b9e281c2
ID		 310{
311 struct ceph_osd_data *osd_data;
312 struct ceph_bvec_iter it = {
313 .bvecs = bvecs,
314 .iter = { .bi_size = bytes },
315 };
316
317 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
0010f705 318 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
b9e281c2
ID		 319 osd_req->r_ops[which].cls.indata_len += bytes;
320 osd_req->r_ops[which].indata_len += bytes;
321}
322EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
323
a4ce40a9
AE		 324void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
325 unsigned int which, struct page **pages, u64 length,
326 u32 alignment, bool pages_from_pool, bool own_pages)
327{
328 struct ceph_osd_data *osd_data;
329
863c7eb5 330 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 331 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
332 pages_from_pool, own_pages);
a4ce40a9
AE		 333}
334EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
335
23c08a9c
AE		 336static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
337{
338 switch (osd_data->type) {
339 case CEPH_OSD_DATA_TYPE_NONE:
340 return 0;
341 case CEPH_OSD_DATA_TYPE_PAGES:
342 return osd_data->length;
343 case CEPH_OSD_DATA_TYPE_PAGELIST:
344 return (u64)osd_data->pagelist->length;
345#ifdef CONFIG_BLOCK
346 case CEPH_OSD_DATA_TYPE_BIO:
347 return (u64)osd_data->bio_length;
348#endif /* CONFIG_BLOCK */
b9e281c2
ID		 349 case CEPH_OSD_DATA_TYPE_BVECS:
350 return osd_data->bvec_pos.iter.bi_size;
23c08a9c
AE		 351 default:
352 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
353 return 0;
354 }
355}
356
c54d47bf
AE		 357static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
358{
5476492f 359 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 360 int num_pages;
361
362 num_pages = calc_pages_for((u64)osd_data->alignment,
363 (u64)osd_data->length);
364 ceph_release_page_vector(osd_data->pages, num_pages);
365 }
5476492f
AE		 366 ceph_osd_data_init(osd_data);
367}
368
369static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
370 unsigned int which)
371{
372 struct ceph_osd_req_op *op;
373
374 BUG_ON(which >= osd_req->r_num_ops);
375 op = &osd_req->r_ops[which];
376
377 switch (op->op) {
378 case CEPH_OSD_OP_READ:
379 case CEPH_OSD_OP_WRITE:
e30b7577 380 case CEPH_OSD_OP_WRITEFULL:
5476492f
AE		 381 ceph_osd_data_release(&op->extent.osd_data);
382 break;
383 case CEPH_OSD_OP_CALL:
384 ceph_osd_data_release(&op->cls.request_info);
04017e29 385 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 386 ceph_osd_data_release(&op->cls.response_data);
387 break;
d74b50be
YZ		 388 case CEPH_OSD_OP_SETXATTR:
389 case CEPH_OSD_OP_CMPXATTR:
390 ceph_osd_data_release(&op->xattr.osd_data);
391 break;
66ba609f
YZ		 392 case CEPH_OSD_OP_STAT:
393 ceph_osd_data_release(&op->raw_data_in);
394 break;
922dab61
ID		 395 case CEPH_OSD_OP_NOTIFY_ACK:
396 ceph_osd_data_release(&op->notify_ack.request_data);
397 break;
19079203
ID		 398 case CEPH_OSD_OP_NOTIFY:
399 ceph_osd_data_release(&op->notify.request_data);
400 ceph_osd_data_release(&op->notify.response_data);
401 break;
a4ed38d7
DF		 402 case CEPH_OSD_OP_LIST_WATCHERS:
403 ceph_osd_data_release(&op->list_watchers.response_data);
404 break;
5476492f
AE		 405 default:
406 break;
407 }
c54d47bf
AE		 408}
409
63244fa1
ID		 410/*
411 * Assumes @t is zero-initialized.
412 */
413static void target_init(struct ceph_osd_request_target *t)
414{
415 ceph_oid_init(&t->base_oid);
416 ceph_oloc_init(&t->base_oloc);
417 ceph_oid_init(&t->target_oid);
418 ceph_oloc_init(&t->target_oloc);
419
420 ceph_osds_init(&t->acting);
421 ceph_osds_init(&t->up);
422 t->size = -1;
423 t->min_size = -1;
424
425 t->osd = CEPH_HOMELESS_OSD;
426}
427
922dab61
ID		 428static void target_copy(struct ceph_osd_request_target *dest,
429 const struct ceph_osd_request_target *src)
430{
431 ceph_oid_copy(&dest->base_oid, &src->base_oid);
432 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
433 ceph_oid_copy(&dest->target_oid, &src->target_oid);
434 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
435
436 dest->pgid = src->pgid; /* struct */
dc98ff72 437 dest->spgid = src->spgid; /* struct */
922dab61
ID		 438 dest->pg_num = src->pg_num;
439 dest->pg_num_mask = src->pg_num_mask;
440 ceph_osds_copy(&dest->acting, &src->acting);
441 ceph_osds_copy(&dest->up, &src->up);
442 dest->size = src->size;
443 dest->min_size = src->min_size;
444 dest->sort_bitwise = src->sort_bitwise;
445
446 dest->flags = src->flags;
447 dest->paused = src->paused;
448
04c7d789 449 dest->epoch = src->epoch;
dc93e0e2
ID		 450 dest->last_force_resend = src->last_force_resend;
451
922dab61
ID		 452 dest->osd = src->osd;
453}
454
63244fa1
ID		 455static void target_destroy(struct ceph_osd_request_target *t)
456{
457 ceph_oid_destroy(&t->base_oid);
30c156d9 458 ceph_oloc_destroy(&t->base_oloc);
63244fa1 459 ceph_oid_destroy(&t->target_oid);
30c156d9 460 ceph_oloc_destroy(&t->target_oloc);
63244fa1
ID		 461}
462
f24e9980
SW		 463/*
464 * requests
465 */
3540bfdb
ID		 466static void request_release_checks(struct ceph_osd_request *req)
467{
468 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
4609245e 469 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
3540bfdb
ID		 470 WARN_ON(!list_empty(&req->r_unsafe_item));
471 WARN_ON(req->r_osd);
472}
473
9e94af20 474static void ceph_osdc_release_request(struct kref *kref)
f24e9980 475{
9e94af20
ID		 476 struct ceph_osd_request *req = container_of(kref,
477 struct ceph_osd_request, r_kref);
5476492f 478 unsigned int which;
415e49a9 479
9e94af20
ID		 480 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
481 req->r_request, req->r_reply);
3540bfdb 482 request_release_checks(req);
9e94af20 483
415e49a9
SW		 484 if (req->r_request)
485 ceph_msg_put(req->r_request);
5aea3dcd 486 if (req->r_reply)
ab8cb34a 487 ceph_msg_put(req->r_reply);
0fff87ec 488
5476492f
AE		 489 for (which = 0; which < req->r_num_ops; which++)
490 osd_req_op_data_release(req, which);
0fff87ec 491
a66dd383 492 target_destroy(&req->r_t);
415e49a9 493 ceph_put_snap_context(req->r_snapc);
d30291b9 494
415e49a9
SW		 495 if (req->r_mempool)
496 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 497 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 498 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 499 else
500 kfree(req);
f24e9980 501}
9e94af20
ID		 502
503void ceph_osdc_get_request(struct ceph_osd_request *req)
504{
505 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 506 kref_read(&req->r_kref));
9e94af20
ID		 507 kref_get(&req->r_kref);
508}
509EXPORT_SYMBOL(ceph_osdc_get_request);
510
511void ceph_osdc_put_request(struct ceph_osd_request *req)
512{
3ed97d63
ID		 513 if (req) {
514 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 515 kref_read(&req->r_kref));
3ed97d63
ID		 516 kref_put(&req->r_kref, ceph_osdc_release_request);
517 }
9e94af20
ID		 518}
519EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 520
3540bfdb
ID		 521static void request_init(struct ceph_osd_request *req)
522{
523 /* req only, each op is zeroed in _osd_req_op_init() */
524 memset(req, 0, sizeof(*req));
525
526 kref_init(&req->r_kref);
527 init_completion(&req->r_completion);
3540bfdb 528 RB_CLEAR_NODE(&req->r_node);
4609245e 529 RB_CLEAR_NODE(&req->r_mc_node);
3540bfdb
ID		 530 INIT_LIST_HEAD(&req->r_unsafe_item);
531
532 target_init(&req->r_t);
533}
534
922dab61
ID		 535/*
536 * This is ugly, but it allows us to reuse linger registration and ping
537 * requests, keeping the structure of the code around send_linger{_ping}()
538 * reasonable. Setting up a min_nr=2 mempool for each linger request
539 * and dealing with copying ops (this blasts req only, watch op remains
540 * intact) isn't any better.
541 */
542static void request_reinit(struct ceph_osd_request *req)
543{
544 struct ceph_osd_client *osdc = req->r_osdc;
545 bool mempool = req->r_mempool;
546 unsigned int num_ops = req->r_num_ops;
547 u64 snapid = req->r_snapid;
548 struct ceph_snap_context *snapc = req->r_snapc;
549 bool linger = req->r_linger;
550 struct ceph_msg *request_msg = req->r_request;
551 struct ceph_msg *reply_msg = req->r_reply;
552
553 dout("%s req %p\n", __func__, req);
2c935bc5 554 WARN_ON(kref_read(&req->r_kref) != 1);
922dab61
ID		 555 request_release_checks(req);
556
2c935bc5
PZ		 557 WARN_ON(kref_read(&request_msg->kref) != 1);
558 WARN_ON(kref_read(&reply_msg->kref) != 1);
922dab61
ID		 559 target_destroy(&req->r_t);
560
561 request_init(req);
562 req->r_osdc = osdc;
563 req->r_mempool = mempool;
564 req->r_num_ops = num_ops;
565 req->r_snapid = snapid;
566 req->r_snapc = snapc;
567 req->r_linger = linger;
568 req->r_request = request_msg;
569 req->r_reply = reply_msg;
570}
571
3499e8a5 572struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 573 struct ceph_snap_context *snapc,
1b83bef2 574 unsigned int num_ops,
3499e8a5 575 bool use_mempool,
54a54007 576 gfp_t gfp_flags)
f24e9980
SW		 577{
578 struct ceph_osd_request *req;
1b83bef2 579
f24e9980 580 if (use_mempool) {
3f1af42a 581 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 582 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 583 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
584 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 585 } else {
3f1af42a
ID		 586 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
587 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
588 gfp_flags);
f24e9980 589 }
3f1af42a 590 if (unlikely(!req))
a79832f2 591 return NULL;
f24e9980 592
3540bfdb 593 request_init(req);
f24e9980
SW		 594 req->r_osdc = osdc;
595 req->r_mempool = use_mempool;
79528734 596 req->r_num_ops = num_ops;
84127282
ID		 597 req->r_snapid = CEPH_NOSNAP;
598 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 599
13d1ad16
ID		 600 dout("%s req %p\n", __func__, req);
601 return req;
602}
603EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 604
2e59ffd1 605static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
30c156d9
YZ		 606{
607 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
608}
609
13d1ad16
ID		 610int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
611{
612 struct ceph_osd_client *osdc = req->r_osdc;
613 struct ceph_msg *msg;
614 int msg_size;
c16e7869 615
d30291b9 616 WARN_ON(ceph_oid_empty(&req->r_base_oid));
30c156d9 617 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
d30291b9 618
13d1ad16 619 /* create request message */
8cb441c0
ID		 620 msg_size = CEPH_ENCODING_START_BLK_LEN +
621 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
622 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
623 msg_size += CEPH_ENCODING_START_BLK_LEN +
624 sizeof(struct ceph_osd_reqid); /* reqid */
625 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
626 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
30c156d9
YZ		 627 msg_size += CEPH_ENCODING_START_BLK_LEN +
628 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
13d1ad16
ID		 629 msg_size += 4 + req->r_base_oid.name_len; /* oid */
630 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 631 msg_size += 8; /* snapid */
632 msg_size += 8; /* snap_seq */
13d1ad16 633 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
8cb441c0 634 msg_size += 4 + 8; /* retry_attempt, features */
ae458f5a 635
13d1ad16 636 if (req->r_mempool)
8f3bc053 637 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 638 else
13d1ad16
ID		 639 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
640 if (!msg)
641 return -ENOMEM;
68b4476b 642
f24e9980 643 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 644 req->r_request = msg;
3499e8a5 645
13d1ad16
ID		 646 /* create reply message */
647 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 648 msg_size += req->r_base_oid.name_len;
649 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 650
651 if (req->r_mempool)
652 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
653 else
654 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
655 if (!msg)
656 return -ENOMEM;
657
658 req->r_reply = msg;
659
660 return 0;
3499e8a5 661}
13d1ad16 662EXPORT_SYMBOL(ceph_osdc_alloc_messages);
3499e8a5 663
a8dd0a37 664static bool osd_req_opcode_valid(u16 opcode)
68b4476b 665{
a8dd0a37 666 switch (opcode) {
70b5bfa3
ID		 667#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
668__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
669#undef GENERATE_CASE
a8dd0a37
AE		 670 default:
671 return false;
672 }
673}
674
33803f33
AE		 675/*
676 * This is an osd op init function for opcodes that have no data or
677 * other information associated with them. It also serves as a
678 * common init routine for all the other init functions, below.
679 */
c99d2d4a 680static struct ceph_osd_req_op *
49719778 681_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 682 u16 opcode, u32 flags)
33803f33 683{
c99d2d4a
AE		 684 struct ceph_osd_req_op *op;
685
686 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 687 BUG_ON(!osd_req_opcode_valid(opcode));
688
c99d2d4a 689 op = &osd_req->r_ops[which];
33803f33 690 memset(op, 0, sizeof (*op));
33803f33 691 op->op = opcode;
144cba14 692 op->flags = flags;
c99d2d4a
AE		 693
694 return op;
33803f33
AE		 695}
696
49719778 697void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 698 unsigned int which, u16 opcode, u32 flags)
49719778 699{
144cba14 700 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 701}
702EXPORT_SYMBOL(osd_req_op_init);
703
c99d2d4a
AE		 704void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
705 unsigned int which, u16 opcode,
33803f33
AE		 706 u64 offset, u64 length,
707 u64 truncate_size, u32 truncate_seq)
708{
144cba14
YZ		 709 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
710 opcode, 0);
33803f33
AE		 711 size_t payload_len = 0;
712
ad7a60de 713 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 714 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
715 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 716
33803f33
AE		 717 op->extent.offset = offset;
718 op->extent.length = length;
719 op->extent.truncate_size = truncate_size;
720 op->extent.truncate_seq = truncate_seq;
e30b7577 721 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 722 payload_len += length;
723
de2aa102 724 op->indata_len = payload_len;
33803f33
AE		 725}
726EXPORT_SYMBOL(osd_req_op_extent_init);
727
c99d2d4a
AE		 728void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
729 unsigned int which, u64 length)
e5975c7c 730{
c99d2d4a
AE		 731 struct ceph_osd_req_op *op;
732 u64 previous;
733
734 BUG_ON(which >= osd_req->r_num_ops);
735 op = &osd_req->r_ops[which];
736 previous = op->extent.length;
e5975c7c
AE		 737
738 if (length == previous)
739 return; /* Nothing to do */
740 BUG_ON(length > previous);
741
742 op->extent.length = length;
d641df81
YZ		 743 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
744 op->indata_len -= previous - length;
e5975c7c
AE		 745}
746EXPORT_SYMBOL(osd_req_op_extent_update);
747
2c63f49a
YZ		 748void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
749 unsigned int which, u64 offset_inc)
750{
751 struct ceph_osd_req_op *op, *prev_op;
752
753 BUG_ON(which + 1 >= osd_req->r_num_ops);
754
755 prev_op = &osd_req->r_ops[which];
756 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
757 /* dup previous one */
758 op->indata_len = prev_op->indata_len;
759 op->outdata_len = prev_op->outdata_len;
760 op->extent = prev_op->extent;
761 /* adjust offset */
762 op->extent.offset += offset_inc;
763 op->extent.length -= offset_inc;
764
765 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
766 op->indata_len -= offset_inc;
767}
768EXPORT_SYMBOL(osd_req_op_extent_dup_last);
769
c99d2d4a 770void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 771 u16 opcode, const char *class, const char *method)
33803f33 772{
144cba14
YZ		 773 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
774 opcode, 0);
5f562df5 775 struct ceph_pagelist *pagelist;
33803f33
AE		 776 size_t payload_len = 0;
777 size_t size;
778
779 BUG_ON(opcode != CEPH_OSD_OP_CALL);
780
5f562df5
AE		 781 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
782 BUG_ON(!pagelist);
783 ceph_pagelist_init(pagelist);
784
33803f33
AE		 785 op->cls.class_name = class;
786 size = strlen(class);
787 BUG_ON(size > (size_t) U8_MAX);
788 op->cls.class_len = size;
5f562df5 789 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 790 payload_len += size;
791
792 op->cls.method_name = method;
793 size = strlen(method);
794 BUG_ON(size > (size_t) U8_MAX);
795 op->cls.method_len = size;
5f562df5 796 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 797 payload_len += size;
798
a4ce40a9 799 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 800
de2aa102 801 op->indata_len = payload_len;
33803f33
AE		 802}
803EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 804
d74b50be
YZ		 805int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
806 u16 opcode, const char *name, const void *value,
807 size_t size, u8 cmp_op, u8 cmp_mode)
808{
144cba14
YZ		 809 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
810 opcode, 0);
d74b50be
YZ		 811 struct ceph_pagelist *pagelist;
812 size_t payload_len;
813
814 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
815
816 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
817 if (!pagelist)
818 return -ENOMEM;
819
820 ceph_pagelist_init(pagelist);
821
822 payload_len = strlen(name);
823 op->xattr.name_len = payload_len;
824 ceph_pagelist_append(pagelist, name, payload_len);
825
826 op->xattr.value_len = size;
827 ceph_pagelist_append(pagelist, value, size);
828 payload_len += size;
829
830 op->xattr.cmp_op = cmp_op;
831 op->xattr.cmp_mode = cmp_mode;
832
833 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 834 op->indata_len = payload_len;
d74b50be
YZ		 835 return 0;
836}
837EXPORT_SYMBOL(osd_req_op_xattr_init);
838
922dab61
ID		 839/*
840 * @watch_opcode: CEPH_OSD_WATCH_OP_*
841 */
842static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
843 u64 cookie, u8 watch_opcode)
33803f33 844{
922dab61 845 struct ceph_osd_req_op *op;
33803f33 846
922dab61 847 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
33803f33 848 op->watch.cookie = cookie;
922dab61
ID		 849 op->watch.op = watch_opcode;
850 op->watch.gen = 0;
33803f33 851}
33803f33 852
c647b8a8
ID		 853void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
854 unsigned int which,
855 u64 expected_object_size,
856 u64 expected_write_size)
857{
858 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 859 CEPH_OSD_OP_SETALLOCHINT,
860 0);
c647b8a8
ID		 861
862 op->alloc_hint.expected_object_size = expected_object_size;
863 op->alloc_hint.expected_write_size = expected_write_size;
864
865 /*
866 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
867 * not worth a feature bit. Set FAILOK per-op flag to make
868 * sure older osds don't trip over an unsupported opcode.
869 */
870 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
871}
872EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
873
90af3602 874static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 875 struct ceph_osd_data *osd_data)
876{
877 u64 length = ceph_osd_data_length(osd_data);
878
879 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
880 BUG_ON(length > (u64) SIZE_MAX);
881 if (length)
90af3602 882 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 883 length, osd_data->alignment);
884 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
885 BUG_ON(!length);
90af3602 886 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 887#ifdef CONFIG_BLOCK
888 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
5359a17d 889 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
ec9123c5 890#endif
b9e281c2
ID		 891 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
892 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
ec9123c5
AE		 893 } else {
894 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
895 }
896}
897
bb873b53
ID		 898static u32 osd_req_encode_op(struct ceph_osd_op *dst,
899 const struct ceph_osd_req_op *src)
a8dd0a37 900{
a8dd0a37
AE		 901 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
902 pr_err("unrecognized osd opcode %d\n", src->op);
903
904 return 0;
905 }
906
907 switch (src->op) {
908 case CEPH_OSD_OP_STAT:
909 break;
910 case CEPH_OSD_OP_READ:
911 case CEPH_OSD_OP_WRITE:
e30b7577 912 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 913 case CEPH_OSD_OP_ZERO:
ad7a60de 914 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37
AE		 915 dst->extent.offset = cpu_to_le64(src->extent.offset);
916 dst->extent.length = cpu_to_le64(src->extent.length);
917 dst->extent.truncate_size =
918 cpu_to_le64(src->extent.truncate_size);
919 dst->extent.truncate_seq =
920 cpu_to_le32(src->extent.truncate_seq);
921 break;
922 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 923 dst->cls.class_len = src->cls.class_len;
924 dst->cls.method_len = src->cls.method_len;
bb873b53 925 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
a8dd0a37 926 break;
a8dd0a37
AE		 927 case CEPH_OSD_OP_WATCH:
928 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
922dab61
ID		 929 dst->watch.ver = cpu_to_le64(0);
930 dst->watch.op = src->watch.op;
931 dst->watch.gen = cpu_to_le32(src->watch.gen);
932 break;
933 case CEPH_OSD_OP_NOTIFY_ACK:
a8dd0a37 934 break;
19079203
ID		 935 case CEPH_OSD_OP_NOTIFY:
936 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
937 break;
a4ed38d7
DF		 938 case CEPH_OSD_OP_LIST_WATCHERS:
939 break;
c647b8a8
ID		 940 case CEPH_OSD_OP_SETALLOCHINT:
941 dst->alloc_hint.expected_object_size =
942 cpu_to_le64(src->alloc_hint.expected_object_size);
943 dst->alloc_hint.expected_write_size =
944 cpu_to_le64(src->alloc_hint.expected_write_size);
945 break;
d74b50be
YZ		 946 case CEPH_OSD_OP_SETXATTR:
947 case CEPH_OSD_OP_CMPXATTR:
948 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
949 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
950 dst->xattr.cmp_op = src->xattr.cmp_op;
951 dst->xattr.cmp_mode = src->xattr.cmp_mode;
d74b50be 952 break;
864e9197
YZ		 953 case CEPH_OSD_OP_CREATE:
954 case CEPH_OSD_OP_DELETE:
955 break;
a8dd0a37 956 default:
4c46459c 957 pr_err("unsupported osd opcode %s\n",
8f63ca2d 958 ceph_osd_op_name(src->op));
4c46459c 959 WARN_ON(1);
a8dd0a37
AE		 960
961 return 0;
68b4476b 962 }
7b25bf5f 963
a8dd0a37 964 dst->op = cpu_to_le16(src->op);
7b25bf5f 965 dst->flags = cpu_to_le32(src->flags);
de2aa102 966 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 967
bb873b53 968 return src->indata_len;
68b4476b
YS		 969}
970
3499e8a5
YS		 971/*
972 * build new request AND message, calculate layout, and adjust file
973 * extent as needed.
974 *
975 * if the file was recently truncated, we include information about its
976 * old and new size so that the object can be updated appropriately. (we
977 * avoid synchronously deleting truncated objects because it's slow.)
3499e8a5
YS		 978 */
979struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
980 struct ceph_file_layout *layout,
981 struct ceph_vino vino,
715e4cd4
YZ		 982 u64 off, u64 *plen,
983 unsigned int which, int num_ops,
3499e8a5
YS		 984 int opcode, int flags,
985 struct ceph_snap_context *snapc,
3499e8a5
YS		 986 u32 truncate_seq,
987 u64 truncate_size,
153e5167 988 bool use_mempool)
3499e8a5 989{
68b4476b 990 struct ceph_osd_request *req;
75d1c941
AE		 991 u64 objnum = 0;
992 u64 objoff = 0;
993 u64 objlen = 0;
6816282d 994 int r;
68b4476b 995
ad7a60de 996 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 997 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
998 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 999
acead002 1000 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 1001 GFP_NOFS);
13d1ad16
ID		 1002 if (!req) {
1003 r = -ENOMEM;
1004 goto fail;
1005 }
79528734 1006
3499e8a5 1007 /* calculate max write size */
a19dadfb 1008 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 1009 if (r)
1010 goto fail;
a19dadfb 1011
864e9197 1012 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 1013 osd_req_op_init(req, which, opcode, 0);
864e9197 1014 } else {
7627151e 1015 u32 object_size = layout->object_size;
864e9197
YZ		 1016 u32 object_base = off - objoff;
1017 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1018 if (truncate_size <= object_base) {
1019 truncate_size = 0;
1020 } else {
1021 truncate_size -= object_base;
1022 if (truncate_size > object_size)
1023 truncate_size = object_size;
1024 }
ccca4e37 1025 }
715e4cd4 1026 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 1027 truncate_size, truncate_seq);
1028 }
d18d1e28 1029
a1f4020a 1030 req->r_abort_on_full = true;
bb873b53 1031 req->r_flags = flags;
7627151e 1032 req->r_base_oloc.pool = layout->pool_id;
30c156d9 1033 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
d30291b9 1034 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
dbe0fc41 1035
bb873b53
ID		 1036 req->r_snapid = vino.snap;
1037 if (flags & CEPH_OSD_FLAG_WRITE)
1038 req->r_data_offset = off;
1039
13d1ad16
ID		 1040 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
1041 if (r)
1042 goto fail;
1043
f24e9980 1044 return req;
13d1ad16
ID		 1045
1046fail:
1047 ceph_osdc_put_request(req);
1048 return ERR_PTR(r);
f24e9980 1049}
3d14c5d2 1050EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 1051
1052/*
1053 * We keep osd requests in an rbtree, sorted by ->r_tid.
1054 */
fcd00b68 1055DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
4609245e 1056DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
f24e9980 1057
0247a0cf
ID		 1058static bool osd_homeless(struct ceph_osd *osd)
1059{
1060 return osd->o_osd == CEPH_HOMELESS_OSD;
1061}
1062
5aea3dcd 1063static bool osd_registered(struct ceph_osd *osd)
f24e9980 1064{
5aea3dcd 1065 verify_osdc_locked(osd->o_osdc);
f24e9980 1066
5aea3dcd 1067 return !RB_EMPTY_NODE(&osd->o_node);
f24e9980
SW		 1068}
1069
0247a0cf
ID		 1070/*
1071 * Assumes @osd is zero-initialized.
1072 */
1073static void osd_init(struct ceph_osd *osd)
1074{
02113a0f 1075 refcount_set(&osd->o_ref, 1);
0247a0cf 1076 RB_CLEAR_NODE(&osd->o_node);
5aea3dcd 1077 osd->o_requests = RB_ROOT;
922dab61 1078 osd->o_linger_requests = RB_ROOT;
a02a946d
ID		 1079 osd->o_backoff_mappings = RB_ROOT;
1080 osd->o_backoffs_by_id = RB_ROOT;
0247a0cf
ID		 1081 INIT_LIST_HEAD(&osd->o_osd_lru);
1082 INIT_LIST_HEAD(&osd->o_keepalive_item);
1083 osd->o_incarnation = 1;
5aea3dcd 1084 mutex_init(&osd->lock);
0247a0cf
ID		 1085}
1086
1087static void osd_cleanup(struct ceph_osd *osd)
1088{
1089 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
5aea3dcd 1090 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 1091 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
a02a946d
ID		 1092 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1093 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
0247a0cf
ID		 1094 WARN_ON(!list_empty(&osd->o_osd_lru));
1095 WARN_ON(!list_empty(&osd->o_keepalive_item));
1096
1097 if (osd->o_auth.authorizer) {
1098 WARN_ON(osd_homeless(osd));
1099 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1100 }
1101}
1102
f24e9980
SW		 1103/*
1104 * Track open sessions with osds.
1105 */
e10006f8 1106static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1107{
1108 struct ceph_osd *osd;
1109
0247a0cf
ID		 1110 WARN_ON(onum == CEPH_HOMELESS_OSD);
1111
7a28f59b 1112 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
0247a0cf 1113 osd_init(osd);
f24e9980 1114 osd->o_osdc = osdc;
e10006f8 1115 osd->o_osd = onum;
f24e9980 1116
b7a9e5dd 1117 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1118
f24e9980
SW		 1119 return osd;
1120}
1121
1122static struct ceph_osd *get_osd(struct ceph_osd *osd)
1123{
02113a0f
ER		 1124 if (refcount_inc_not_zero(&osd->o_ref)) {
1125 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1126 refcount_read(&osd->o_ref));
f24e9980
SW		 1127 return osd;
1128 } else {
1129 dout("get_osd %p FAIL\n", osd);
1130 return NULL;
1131 }
1132}
1133
1134static void put_osd(struct ceph_osd *osd)
1135{
02113a0f
ER		 1136 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1137 refcount_read(&osd->o_ref) - 1);
1138 if (refcount_dec_and_test(&osd->o_ref)) {
0247a0cf 1139 osd_cleanup(osd);
f24e9980 1140 kfree(osd);
79494d1b 1141 }
f24e9980
SW		 1142}
1143
fcd00b68
ID		 1144DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1145
9dd2845c 1146static void __move_osd_to_lru(struct ceph_osd *osd)
f5a2041b 1147{
9dd2845c
ID		 1148 struct ceph_osd_client *osdc = osd->o_osdc;
1149
1150 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
f5a2041b 1151 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1152
9dd2845c 1153 spin_lock(&osdc->osd_lru_lock);
f5a2041b 1154 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
9dd2845c
ID		 1155 spin_unlock(&osdc->osd_lru_lock);
1156
a319bf56 1157 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1158}
1159
9dd2845c 1160static void maybe_move_osd_to_lru(struct ceph_osd *osd)
bbf37ec3 1161{
5aea3dcd 1162 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1163 RB_EMPTY_ROOT(&osd->o_linger_requests))
9dd2845c 1164 __move_osd_to_lru(osd);
bbf37ec3
ID		 1165}
1166
f5a2041b
YS		 1167static void __remove_osd_from_lru(struct ceph_osd *osd)
1168{
9dd2845c
ID		 1169 struct ceph_osd_client *osdc = osd->o_osdc;
1170
1171 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1172
1173 spin_lock(&osdc->osd_lru_lock);
f5a2041b
YS		 1174 if (!list_empty(&osd->o_osd_lru))
1175 list_del_init(&osd->o_osd_lru);
9dd2845c 1176 spin_unlock(&osdc->osd_lru_lock);
f5a2041b
YS		 1177}
1178
5aea3dcd
ID		 1179/*
1180 * Close the connection and assign any leftover requests to the
1181 * homeless session.
1182 */
1183static void close_osd(struct ceph_osd *osd)
1184{
1185 struct ceph_osd_client *osdc = osd->o_osdc;
1186 struct rb_node *n;
1187
1188 verify_osdc_wrlocked(osdc);
1189 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1190
1191 ceph_con_close(&osd->o_con);
1192
1193 for (n = rb_first(&osd->o_requests); n; ) {
1194 struct ceph_osd_request *req =
1195 rb_entry(n, struct ceph_osd_request, r_node);
1196
1197 n = rb_next(n); /* unlink_request() */
1198
1199 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1200 unlink_request(osd, req);
1201 link_request(&osdc->homeless_osd, req);
1202 }
922dab61
ID		 1203 for (n = rb_first(&osd->o_linger_requests); n; ) {
1204 struct ceph_osd_linger_request *lreq =
1205 rb_entry(n, struct ceph_osd_linger_request, node);
1206
1207 n = rb_next(n); /* unlink_linger() */
1208
1209 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1210 lreq->linger_id);
1211 unlink_linger(osd, lreq);
1212 link_linger(&osdc->homeless_osd, lreq);
1213 }
a02a946d 1214 clear_backoffs(osd);
5aea3dcd
ID		 1215
1216 __remove_osd_from_lru(osd);
1217 erase_osd(&osdc->osds, osd);
1218 put_osd(osd);
1219}
1220
f24e9980
SW		 1221/*
1222 * reset osd connect
1223 */
5aea3dcd 1224static int reopen_osd(struct ceph_osd *osd)
f24e9980 1225{
c3acb181 1226 struct ceph_entity_addr *peer_addr;
f24e9980 1227
5aea3dcd
ID		 1228 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1229
1230 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1231 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
5aea3dcd 1232 close_osd(osd);
c3acb181
AE		 1233 return -ENODEV;
1234 }
1235
5aea3dcd 1236 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
c3acb181
AE		 1237 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1238 !ceph_con_opened(&osd->o_con)) {
5aea3dcd 1239 struct rb_node *n;
c3acb181 1240
0b4af2e8
ID		 1241 dout("osd addr hasn't changed and connection never opened, "
1242 "letting msgr retry\n");
87b315a5 1243 /* touch each r_stamp for handle_timeout()'s benfit */
5aea3dcd
ID		 1244 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1245 struct ceph_osd_request *req =
1246 rb_entry(n, struct ceph_osd_request, r_node);
87b315a5 1247 req->r_stamp = jiffies;
5aea3dcd 1248 }
c3acb181
AE		 1249
1250 return -EAGAIN;
f24e9980 1251 }
c3acb181
AE		 1252
1253 ceph_con_close(&osd->o_con);
1254 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1255 osd->o_incarnation++;
1256
1257 return 0;
f24e9980
SW		 1258}
1259
5aea3dcd
ID		 1260static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1261 bool wrlocked)
f24e9980 1262{
5aea3dcd 1263 struct ceph_osd *osd;
35f9f8a0 1264
5aea3dcd
ID		 1265 if (wrlocked)
1266 verify_osdc_wrlocked(osdc);
1267 else
1268 verify_osdc_locked(osdc);
f24e9980 1269
5aea3dcd
ID		 1270 if (o != CEPH_HOMELESS_OSD)
1271 osd = lookup_osd(&osdc->osds, o);
1272 else
1273 osd = &osdc->homeless_osd;
1274 if (!osd) {
1275 if (!wrlocked)
1276 return ERR_PTR(-EAGAIN);
0ba6478d 1277
5aea3dcd
ID		 1278 osd = create_osd(osdc, o);
1279 insert_osd(&osdc->osds, osd);
1280 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1281 &osdc->osdmap->osd_addr[osd->o_osd]);
0ba6478d 1282 }
f24e9980 1283
5aea3dcd
ID		 1284 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1285 return osd;
f24e9980
SW		 1286}
1287
1288/*
5aea3dcd
ID		 1289 * Create request <-> OSD session relation.
1290 *
1291 * @req has to be assigned a tid, @osd may be homeless.
f24e9980 1292 */
5aea3dcd 1293static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
f24e9980 1294{
5aea3dcd
ID		 1295 verify_osd_locked(osd);
1296 WARN_ON(!req->r_tid || req->r_osd);
1297 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1298 req, req->r_tid);
1299
1300 if (!osd_homeless(osd))
1301 __remove_osd_from_lru(osd);
1302 else
1303 atomic_inc(&osd->o_osdc->num_homeless);
1304
1305 get_osd(osd);
1306 insert_request(&osd->o_requests, req);
1307 req->r_osd = osd;
f24e9980
SW		 1308}
1309
5aea3dcd
ID		 1310static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1311{
1312 verify_osd_locked(osd);
1313 WARN_ON(req->r_osd != osd);
1314 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1315 req, req->r_tid);
1316
1317 req->r_osd = NULL;
1318 erase_request(&osd->o_requests, req);
1319 put_osd(osd);
1320
1321 if (!osd_homeless(osd))
1322 maybe_move_osd_to_lru(osd);
1323 else
1324 atomic_dec(&osd->o_osdc->num_homeless);
1325}
1326
63244fa1
ID		 1327static bool __pool_full(struct ceph_pg_pool_info *pi)
1328{
1329 return pi->flags & CEPH_POOL_FLAG_FULL;
1330}
1331
42c1b124
ID		 1332static bool have_pool_full(struct ceph_osd_client *osdc)
1333{
1334 struct rb_node *n;
1335
1336 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1337 struct ceph_pg_pool_info *pi =
1338 rb_entry(n, struct ceph_pg_pool_info, node);
1339
1340 if (__pool_full(pi))
1341 return true;
1342 }
1343
1344 return false;
1345}
1346
5aea3dcd
ID		 1347static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1348{
1349 struct ceph_pg_pool_info *pi;
1350
1351 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1352 if (!pi)
1353 return false;
1354
1355 return __pool_full(pi);
1356}
1357
d29adb34
JD		 1358/*
1359 * Returns whether a request should be blocked from being sent
1360 * based on the current osdmap and osd_client settings.
d29adb34 1361 */
63244fa1
ID		 1362static bool target_should_be_paused(struct ceph_osd_client *osdc,
1363 const struct ceph_osd_request_target *t,
1364 struct ceph_pg_pool_info *pi)
1365{
b7ec35b3
ID		 1366 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1367 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1368 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
63244fa1
ID		 1369 __pool_full(pi);
1370
6d637a54 1371 WARN_ON(pi->id != t->target_oloc.pool);
58eb7932
JL		 1372 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1373 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1374 (osdc->osdmap->epoch < osdc->epoch_barrier);
63244fa1
ID		 1375}
1376
63244fa1
ID		 1377enum calc_target_result {
1378 CALC_TARGET_NO_ACTION = 0,
1379 CALC_TARGET_NEED_RESEND,
1380 CALC_TARGET_POOL_DNE,
1381};
1382
1383static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1384 struct ceph_osd_request_target *t,
7de030d6 1385 struct ceph_connection *con,
63244fa1
ID		 1386 bool any_change)
1387{
1388 struct ceph_pg_pool_info *pi;
1389 struct ceph_pg pgid, last_pgid;
1390 struct ceph_osds up, acting;
1391 bool force_resend = false;
84ed45df
ID		 1392 bool unpaused = false;
1393 bool legacy_change;
7de030d6 1394 bool split = false;
b7ec35b3 1395 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
ae78dd81
ID		 1396 bool recovery_deletes = ceph_osdmap_flag(osdc,
1397 CEPH_OSDMAP_RECOVERY_DELETES);
63244fa1
ID		 1398 enum calc_target_result ct_res;
1399 int ret;
1400
04c7d789 1401 t->epoch = osdc->osdmap->epoch;
63244fa1
ID		 1402 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1403 if (!pi) {
1404 t->osd = CEPH_HOMELESS_OSD;
1405 ct_res = CALC_TARGET_POOL_DNE;
1406 goto out;
1407 }
1408
1409 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
dc93e0e2
ID		 1410 if (t->last_force_resend < pi->last_force_request_resend) {
1411 t->last_force_resend = pi->last_force_request_resend;
63244fa1 1412 force_resend = true;
dc93e0e2 1413 } else if (t->last_force_resend == 0) {
63244fa1
ID		 1414 force_resend = true;
1415 }
1416 }
63244fa1 1417
db098ec4
ID		 1418 /* apply tiering */
1419 ceph_oid_copy(&t->target_oid, &t->base_oid);
1420 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1421 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
63244fa1
ID		 1422 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1423 t->target_oloc.pool = pi->read_tier;
1424 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1425 t->target_oloc.pool = pi->write_tier;
6d637a54
ID		 1426
1427 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1428 if (!pi) {
1429 t->osd = CEPH_HOMELESS_OSD;
1430 ct_res = CALC_TARGET_POOL_DNE;
1431 goto out;
1432 }
63244fa1
ID		 1433 }
1434
df28152d
ID		 1435 ret = __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc,
1436 &pgid);
63244fa1
ID		 1437 if (ret) {
1438 WARN_ON(ret != -ENOENT);
1439 t->osd = CEPH_HOMELESS_OSD;
1440 ct_res = CALC_TARGET_POOL_DNE;
1441 goto out;
1442 }
1443 last_pgid.pool = pgid.pool;
1444 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1445
df28152d 1446 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
63244fa1
ID		 1447 if (any_change &&
1448 ceph_is_new_interval(&t->acting,
1449 &acting,
1450 &t->up,
1451 &up,
1452 t->size,
1453 pi->size,
1454 t->min_size,
1455 pi->min_size,
1456 t->pg_num,
1457 pi->pg_num,
1458 t->sort_bitwise,
1459 sort_bitwise,
ae78dd81
ID		 1460 t->recovery_deletes,
1461 recovery_deletes,
63244fa1
ID		 1462 &last_pgid))
1463 force_resend = true;
1464
1465 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1466 t->paused = false;
84ed45df 1467 unpaused = true;
63244fa1 1468 }
84ed45df
ID		 1469 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1470 ceph_osds_changed(&t->acting, &acting, any_change);
7de030d6
ID		 1471 if (t->pg_num)
1472 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
63244fa1 1473
7de030d6 1474 if (legacy_change || force_resend || split) {
63244fa1 1475 t->pgid = pgid; /* struct */
df28152d 1476 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
63244fa1
ID		 1477 ceph_osds_copy(&t->acting, &acting);
1478 ceph_osds_copy(&t->up, &up);
1479 t->size = pi->size;
1480 t->min_size = pi->min_size;
1481 t->pg_num = pi->pg_num;
1482 t->pg_num_mask = pi->pg_num_mask;
1483 t->sort_bitwise = sort_bitwise;
ae78dd81 1484 t->recovery_deletes = recovery_deletes;
63244fa1
ID		 1485
1486 t->osd = acting.primary;
63244fa1
ID		 1487 }
1488
7de030d6
ID		 1489 if (unpaused || legacy_change || force_resend ||
1490 (split && con && CEPH_HAVE_FEATURE(con->peer_features,
1491 RESEND_ON_SPLIT)))
84ed45df
ID		 1492 ct_res = CALC_TARGET_NEED_RESEND;
1493 else
1494 ct_res = CALC_TARGET_NO_ACTION;
1495
63244fa1
ID		 1496out:
1497 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1498 return ct_res;
1499}
1500
a02a946d
ID		 1501static struct ceph_spg_mapping *alloc_spg_mapping(void)
1502{
1503 struct ceph_spg_mapping *spg;
1504
1505 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1506 if (!spg)
1507 return NULL;
1508
1509 RB_CLEAR_NODE(&spg->node);
1510 spg->backoffs = RB_ROOT;
1511 return spg;
1512}
1513
1514static void free_spg_mapping(struct ceph_spg_mapping *spg)
1515{
1516 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1517 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1518
1519 kfree(spg);
1520}
1521
1522/*
1523 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1524 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1525 * defined only within a specific spgid; it does not pass anything to
1526 * children on split, or to another primary.
1527 */
1528DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1529 RB_BYPTR, const struct ceph_spg *, node)
1530
1531static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1532{
1533 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1534}
1535
1536static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1537 void **pkey, size_t *pkey_len)
1538{
1539 if (hoid->key_len) {
1540 *pkey = hoid->key;
1541 *pkey_len = hoid->key_len;
1542 } else {
1543 *pkey = hoid->oid;
1544 *pkey_len = hoid->oid_len;
1545 }
1546}
1547
1548static int compare_names(const void *name1, size_t name1_len,
1549 const void *name2, size_t name2_len)
1550{
1551 int ret;
1552
1553 ret = memcmp(name1, name2, min(name1_len, name2_len));
1554 if (!ret) {
1555 if (name1_len < name2_len)
1556 ret = -1;
1557 else if (name1_len > name2_len)
1558 ret = 1;
1559 }
1560 return ret;
1561}
1562
1563static int hoid_compare(const struct ceph_hobject_id *lhs,
1564 const struct ceph_hobject_id *rhs)
1565{
1566 void *effective_key1, *effective_key2;
1567 size_t effective_key1_len, effective_key2_len;
1568 int ret;
1569
1570 if (lhs->is_max < rhs->is_max)
1571 return -1;
1572 if (lhs->is_max > rhs->is_max)
1573 return 1;
1574
1575 if (lhs->pool < rhs->pool)
1576 return -1;
1577 if (lhs->pool > rhs->pool)
1578 return 1;
1579
1580 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1581 return -1;
1582 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1583 return 1;
1584
1585 ret = compare_names(lhs->nspace, lhs->nspace_len,
1586 rhs->nspace, rhs->nspace_len);
1587 if (ret)
1588 return ret;
1589
1590 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1591 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1592 ret = compare_names(effective_key1, effective_key1_len,
1593 effective_key2, effective_key2_len);
1594 if (ret)
1595 return ret;
1596
1597 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1598 if (ret)
1599 return ret;
1600
1601 if (lhs->snapid < rhs->snapid)
1602 return -1;
1603 if (lhs->snapid > rhs->snapid)
1604 return 1;
1605
1606 return 0;
1607}
1608
1609/*
1610 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1611 * compat stuff here.
1612 *
1613 * Assumes @hoid is zero-initialized.
1614 */
1615static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1616{
1617 u8 struct_v;
1618 u32 struct_len;
1619 int ret;
1620
1621 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1622 &struct_len);
1623 if (ret)
1624 return ret;
1625
1626 if (struct_v < 4) {
1627 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1628 goto e_inval;
1629 }
1630
1631 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1632 GFP_NOIO);
1633 if (IS_ERR(hoid->key)) {
1634 ret = PTR_ERR(hoid->key);
1635 hoid->key = NULL;
1636 return ret;
1637 }
1638
1639 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1640 GFP_NOIO);
1641 if (IS_ERR(hoid->oid)) {
1642 ret = PTR_ERR(hoid->oid);
1643 hoid->oid = NULL;
1644 return ret;
1645 }
1646
1647 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1648 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1649 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1650
1651 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1652 GFP_NOIO);
1653 if (IS_ERR(hoid->nspace)) {
1654 ret = PTR_ERR(hoid->nspace);
1655 hoid->nspace = NULL;
1656 return ret;
1657 }
1658
1659 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1660
1661 ceph_hoid_build_hash_cache(hoid);
1662 return 0;
1663
1664e_inval:
1665 return -EINVAL;
1666}
1667
1668static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1669{
1670 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1671 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1672}
1673
1674static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1675{
1676 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1677 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1678 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1679 ceph_encode_64(p, hoid->snapid);
1680 ceph_encode_32(p, hoid->hash);
1681 ceph_encode_8(p, hoid->is_max);
1682 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1683 ceph_encode_64(p, hoid->pool);
1684}
1685
1686static void free_hoid(struct ceph_hobject_id *hoid)
1687{
1688 if (hoid) {
1689 kfree(hoid->key);
1690 kfree(hoid->oid);
1691 kfree(hoid->nspace);
1692 kfree(hoid);
1693 }
1694}
1695
1696static struct ceph_osd_backoff *alloc_backoff(void)
1697{
1698 struct ceph_osd_backoff *backoff;
1699
1700 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1701 if (!backoff)
1702 return NULL;
1703
1704 RB_CLEAR_NODE(&backoff->spg_node);
1705 RB_CLEAR_NODE(&backoff->id_node);
1706 return backoff;
1707}
1708
1709static void free_backoff(struct ceph_osd_backoff *backoff)
1710{
1711 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1712 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1713
1714 free_hoid(backoff->begin);
1715 free_hoid(backoff->end);
1716 kfree(backoff);
1717}
1718
1719/*
1720 * Within a specific spgid, backoffs are managed by ->begin hoid.
1721 */
1722DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1723 RB_BYVAL, spg_node);
1724
1725static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1726 const struct ceph_hobject_id *hoid)
1727{
1728 struct rb_node *n = root->rb_node;
1729
1730 while (n) {
1731 struct ceph_osd_backoff *cur =
1732 rb_entry(n, struct ceph_osd_backoff, spg_node);
1733 int cmp;
1734
1735 cmp = hoid_compare(hoid, cur->begin);
1736 if (cmp < 0) {
1737 n = n->rb_left;
1738 } else if (cmp > 0) {
1739 if (hoid_compare(hoid, cur->end) < 0)
1740 return cur;
1741
1742 n = n->rb_right;
1743 } else {
1744 return cur;
1745 }
1746 }
1747
1748 return NULL;
1749}
1750
1751/*
1752 * Each backoff has a unique id within its OSD session.
1753 */
1754DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1755
1756static void clear_backoffs(struct ceph_osd *osd)
1757{
1758 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1759 struct ceph_spg_mapping *spg =
1760 rb_entry(rb_first(&osd->o_backoff_mappings),
1761 struct ceph_spg_mapping, node);
1762
1763 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1764 struct ceph_osd_backoff *backoff =
1765 rb_entry(rb_first(&spg->backoffs),
1766 struct ceph_osd_backoff, spg_node);
1767
1768 erase_backoff(&spg->backoffs, backoff);
1769 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1770 free_backoff(backoff);
1771 }
1772 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1773 free_spg_mapping(spg);
1774 }
1775}
1776
1777/*
1778 * Set up a temporary, non-owning view into @t.
1779 */
1780static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1781 const struct ceph_osd_request_target *t)
1782{
1783 hoid->key = NULL;
1784 hoid->key_len = 0;
1785 hoid->oid = t->target_oid.name;
1786 hoid->oid_len = t->target_oid.name_len;
1787 hoid->snapid = CEPH_NOSNAP;
1788 hoid->hash = t->pgid.seed;
1789 hoid->is_max = false;
1790 if (t->target_oloc.pool_ns) {
1791 hoid->nspace = t->target_oloc.pool_ns->str;
1792 hoid->nspace_len = t->target_oloc.pool_ns->len;
1793 } else {
1794 hoid->nspace = NULL;
1795 hoid->nspace_len = 0;
1796 }
1797 hoid->pool = t->target_oloc.pool;
1798 ceph_hoid_build_hash_cache(hoid);
1799}
1800
1801static bool should_plug_request(struct ceph_osd_request *req)
1802{
1803 struct ceph_osd *osd = req->r_osd;
1804 struct ceph_spg_mapping *spg;
1805 struct ceph_osd_backoff *backoff;
1806 struct ceph_hobject_id hoid;
1807
1808 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1809 if (!spg)
1810 return false;
1811
1812 hoid_fill_from_target(&hoid, &req->r_t);
1813 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1814 if (!backoff)
1815 return false;
1816
1817 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1818 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1819 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1820 return true;
1821}
1822
bb873b53
ID		 1823static void setup_request_data(struct ceph_osd_request *req,
1824 struct ceph_msg *msg)
f24e9980 1825{
bb873b53
ID		 1826 u32 data_len = 0;
1827 int i;
1828
1829 if (!list_empty(&msg->data))
1830 return;
f24e9980 1831
bb873b53
ID		 1832 WARN_ON(msg->data_length);
1833 for (i = 0; i < req->r_num_ops; i++) {
1834 struct ceph_osd_req_op *op = &req->r_ops[i];
1835
1836 switch (op->op) {
1837 /* request */
1838 case CEPH_OSD_OP_WRITE:
1839 case CEPH_OSD_OP_WRITEFULL:
1840 WARN_ON(op->indata_len != op->extent.length);
1841 ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1842 break;
1843 case CEPH_OSD_OP_SETXATTR:
1844 case CEPH_OSD_OP_CMPXATTR:
1845 WARN_ON(op->indata_len != op->xattr.name_len +
1846 op->xattr.value_len);
1847 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1848 break;
922dab61
ID		 1849 case CEPH_OSD_OP_NOTIFY_ACK:
1850 ceph_osdc_msg_data_add(msg,
1851 &op->notify_ack.request_data);
1852 break;
bb873b53
ID		 1853
1854 /* reply */
1855 case CEPH_OSD_OP_STAT:
1856 ceph_osdc_msg_data_add(req->r_reply,
1857 &op->raw_data_in);
1858 break;
1859 case CEPH_OSD_OP_READ:
1860 ceph_osdc_msg_data_add(req->r_reply,
1861 &op->extent.osd_data);
1862 break;
a4ed38d7
DF		 1863 case CEPH_OSD_OP_LIST_WATCHERS:
1864 ceph_osdc_msg_data_add(req->r_reply,
1865 &op->list_watchers.response_data);
1866 break;
bb873b53
ID		 1867
1868 /* both */
1869 case CEPH_OSD_OP_CALL:
1870 WARN_ON(op->indata_len != op->cls.class_len +
1871 op->cls.method_len +
1872 op->cls.indata_len);
1873 ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1874 /* optional, can be NONE */
1875 ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1876 /* optional, can be NONE */
1877 ceph_osdc_msg_data_add(req->r_reply,
1878 &op->cls.response_data);
1879 break;
19079203
ID		 1880 case CEPH_OSD_OP_NOTIFY:
1881 ceph_osdc_msg_data_add(msg,
1882 &op->notify.request_data);
1883 ceph_osdc_msg_data_add(req->r_reply,
1884 &op->notify.response_data);
1885 break;
bb873b53
ID		 1886 }
1887
1888 data_len += op->indata_len;
1889 }
1b83bef2 1890
bb873b53
ID		 1891 WARN_ON(data_len != msg->data_length);
1892}
1893
2e59ffd1
ID		 1894static void encode_pgid(void **p, const struct ceph_pg *pgid)
1895{
1896 ceph_encode_8(p, 1);
1897 ceph_encode_64(p, pgid->pool);
1898 ceph_encode_32(p, pgid->seed);
1899 ceph_encode_32(p, -1); /* preferred */
1900}
1901
8cb441c0
ID		 1902static void encode_spgid(void **p, const struct ceph_spg *spgid)
1903{
1904 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
1905 encode_pgid(p, &spgid->pgid);
1906 ceph_encode_8(p, spgid->shard);
1907}
1908
2e59ffd1
ID		 1909static void encode_oloc(void **p, void *end,
1910 const struct ceph_object_locator *oloc)
1911{
1912 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
1913 ceph_encode_64(p, oloc->pool);
1914 ceph_encode_32(p, -1); /* preferred */
1915 ceph_encode_32(p, 0); /* key len */
1916 if (oloc->pool_ns)
1917 ceph_encode_string(p, end, oloc->pool_ns->str,
1918 oloc->pool_ns->len);
1919 else
1920 ceph_encode_32(p, 0);
1921}
1922
8cb441c0
ID		 1923static void encode_request_partial(struct ceph_osd_request *req,
1924 struct ceph_msg *msg)
bb873b53
ID		 1925{
1926 void *p = msg->front.iov_base;
1927 void *const end = p + msg->front_alloc_len;
1928 u32 data_len = 0;
1929 int i;
1930
1931 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1932 /* snapshots aren't writeable */
1933 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1934 } else {
1935 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1936 req->r_data_offset || req->r_snapc);
1937 }
1938
1939 setup_request_data(req, msg);
1940
8cb441c0
ID		 1941 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
1942 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
bb873b53
ID		 1943 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1944 ceph_encode_32(&p, req->r_flags);
8cb441c0
ID		 1945
1946 /* reqid */
1947 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
1948 memset(p, 0, sizeof(struct ceph_osd_reqid));
1949 p += sizeof(struct ceph_osd_reqid);
1950
1951 /* trace */
1952 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
1953 p += sizeof(struct ceph_blkin_trace_info);
1954
1955 ceph_encode_32(&p, 0); /* client_inc, always 0 */
bb873b53
ID		 1956 ceph_encode_timespec(p, &req->r_mtime);
1957 p += sizeof(struct ceph_timespec);
aa26d662 1958
2e59ffd1 1959 encode_oloc(&p, end, &req->r_t.target_oloc);
2e59ffd1
ID		 1960 ceph_encode_string(&p, end, req->r_t.target_oid.name,
1961 req->r_t.target_oid.name_len);
f24e9980 1962
bb873b53
ID		 1963 /* ops, can imply data */
1964 ceph_encode_16(&p, req->r_num_ops);
1965 for (i = 0; i < req->r_num_ops; i++) {
1966 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1967 p += sizeof(struct ceph_osd_op);
1968 }
26be8808 1969
bb873b53
ID		 1970 ceph_encode_64(&p, req->r_snapid); /* snapid */
1971 if (req->r_snapc) {
1972 ceph_encode_64(&p, req->r_snapc->seq);
1973 ceph_encode_32(&p, req->r_snapc->num_snaps);
1974 for (i = 0; i < req->r_snapc->num_snaps; i++)
1975 ceph_encode_64(&p, req->r_snapc->snaps[i]);
1976 } else {
1977 ceph_encode_64(&p, 0); /* snap_seq */
1978 ceph_encode_32(&p, 0); /* snaps len */
1979 }
1980
1981 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
986e8989 1982 BUG_ON(p > end - 8); /* space for features */
bb873b53 1983
8cb441c0
ID		 1984 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
1985 /* front_len is finalized in encode_request_finish() */
986e8989
ID		 1986 msg->front.iov_len = p - msg->front.iov_base;
1987 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
bb873b53
ID		 1988 msg->hdr.data_len = cpu_to_le32(data_len);
1989 /*
1990 * The header "data_off" is a hint to the receiver allowing it
1991 * to align received data into its buffers such that there's no
1992 * need to re-copy it before writing it to disk (direct I/O).
1993 */
1994 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
26be8808 1995
8cb441c0
ID		 1996 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
1997 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
1998}
1999
2000static void encode_request_finish(struct ceph_msg *msg)
2001{
2002 void *p = msg->front.iov_base;
986e8989 2003 void *const partial_end = p + msg->front.iov_len;
8cb441c0
ID		 2004 void *const end = p + msg->front_alloc_len;
2005
2006 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2007 /* luminous OSD -- encode features and be done */
986e8989 2008 p = partial_end;
8cb441c0
ID		 2009 ceph_encode_64(&p, msg->con->peer_features);
2010 } else {
2011 struct {
2012 char spgid[CEPH_ENCODING_START_BLK_LEN +
2013 CEPH_PGID_ENCODING_LEN + 1];
2014 __le32 hash;
2015 __le32 epoch;
2016 __le32 flags;
2017 char reqid[CEPH_ENCODING_START_BLK_LEN +
2018 sizeof(struct ceph_osd_reqid)];
2019 char trace[sizeof(struct ceph_blkin_trace_info)];
2020 __le32 client_inc;
2021 struct ceph_timespec mtime;
2022 } __packed head;
2023 struct ceph_pg pgid;
2024 void *oloc, *oid, *tail;
2025 int oloc_len, oid_len, tail_len;
2026 int len;
2027
2028 /*
2029 * Pre-luminous OSD -- reencode v8 into v4 using @head
2030 * as a temporary buffer. Encode the raw PG; the rest
2031 * is just a matter of moving oloc, oid and tail blobs
2032 * around.
2033 */
2034 memcpy(&head, p, sizeof(head));
2035 p += sizeof(head);
2036
2037 oloc = p;
2038 p += CEPH_ENCODING_START_BLK_LEN;
2039 pgid.pool = ceph_decode_64(&p);
2040 p += 4 + 4; /* preferred, key len */
2041 len = ceph_decode_32(&p);
2042 p += len; /* nspace */
2043 oloc_len = p - oloc;
2044
2045 oid = p;
2046 len = ceph_decode_32(&p);
2047 p += len;
2048 oid_len = p - oid;
2049
2050 tail = p;
986e8989 2051 tail_len = partial_end - p;
8cb441c0
ID		 2052
2053 p = msg->front.iov_base;
2054 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2055 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2056 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2057 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2058
2059 /* reassert_version */
2060 memset(p, 0, sizeof(struct ceph_eversion));
2061 p += sizeof(struct ceph_eversion);
2062
2063 BUG_ON(p >= oloc);
2064 memmove(p, oloc, oloc_len);
2065 p += oloc_len;
2066
2067 pgid.seed = le32_to_cpu(head.hash);
2068 encode_pgid(&p, &pgid); /* raw pg */
2069
2070 BUG_ON(p >= oid);
2071 memmove(p, oid, oid_len);
2072 p += oid_len;
2073
2074 /* tail -- ops, snapid, snapc, retry_attempt */
2075 BUG_ON(p >= tail);
2076 memmove(p, tail, tail_len);
2077 p += tail_len;
2078
2079 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2080 }
2081
2082 BUG_ON(p > end);
2083 msg->front.iov_len = p - msg->front.iov_base;
2084 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2085
2086 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2087 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2088 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2089 le16_to_cpu(msg->hdr.version));
bb873b53
ID		 2090}
2091
2092/*
2093 * @req has to be assigned a tid and registered.
2094 */
2095static void send_request(struct ceph_osd_request *req)
2096{
2097 struct ceph_osd *osd = req->r_osd;
2098
5aea3dcd 2099 verify_osd_locked(osd);
bb873b53
ID		 2100 WARN_ON(osd->o_osd != req->r_t.osd);
2101
a02a946d
ID		 2102 /* backoff? */
2103 if (should_plug_request(req))
2104 return;
2105
5aea3dcd
ID		 2106 /*
2107 * We may have a previously queued request message hanging
2108 * around. Cancel it to avoid corrupting the msgr.
2109 */
2110 if (req->r_sent)
2111 ceph_msg_revoke(req->r_request);
2112
bb873b53
ID		 2113 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2114 if (req->r_attempts)
2115 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2116 else
2117 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2118
8cb441c0 2119 encode_request_partial(req, req->r_request);
bb873b53 2120
04c7d789 2121 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 2122 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
dc98ff72 2123 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
04c7d789
ID		 2124 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2125 req->r_attempts);
bb873b53
ID		 2126
2127 req->r_t.paused = false;
2128 req->r_stamp = jiffies;
2129 req->r_attempts++;
2130
2131 req->r_sent = osd->o_incarnation;
2132 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2133 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
f24e9980
SW		 2134}
2135
42c1b124
ID		 2136static void maybe_request_map(struct ceph_osd_client *osdc)
2137{
2138 bool continuous = false;
2139
5aea3dcd 2140 verify_osdc_locked(osdc);
42c1b124
ID		 2141 WARN_ON(!osdc->osdmap->epoch);
2142
b7ec35b3
ID		 2143 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2144 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2145 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
42c1b124
ID		 2146 dout("%s osdc %p continuous\n", __func__, osdc);
2147 continuous = true;
2148 } else {
2149 dout("%s osdc %p onetime\n", __func__, osdc);
2150 }
2151
2152 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2153 osdc->osdmap->epoch + 1, continuous))
2154 ceph_monc_renew_subs(&osdc->client->monc);
2155}
2156
a1f4020a 2157static void complete_request(struct ceph_osd_request *req, int err);
4609245e
ID		 2158static void send_map_check(struct ceph_osd_request *req);
2159
5aea3dcd 2160static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
0bbfdfe8 2161{
5aea3dcd
ID		 2162 struct ceph_osd_client *osdc = req->r_osdc;
2163 struct ceph_osd *osd;
4609245e 2164 enum calc_target_result ct_res;
5aea3dcd
ID		 2165 bool need_send = false;
2166 bool promoted = false;
a1f4020a 2167 bool need_abort = false;
0bbfdfe8 2168
b18b9550 2169 WARN_ON(req->r_tid);
5aea3dcd
ID		 2170 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2171
2172again:
7de030d6 2173 ct_res = calc_target(osdc, &req->r_t, NULL, false);
4609245e
ID		 2174 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2175 goto promote;
2176
5aea3dcd
ID		 2177 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2178 if (IS_ERR(osd)) {
2179 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2180 goto promote;
0bbfdfe8
ID		 2181 }
2182
58eb7932
JL		 2183 if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2184 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2185 osdc->epoch_barrier);
2186 req->r_t.paused = true;
2187 maybe_request_map(osdc);
2188 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2189 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
5aea3dcd
ID		 2190 dout("req %p pausewr\n", req);
2191 req->r_t.paused = true;
2192 maybe_request_map(osdc);
2193 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
b7ec35b3 2194 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
5aea3dcd
ID		 2195 dout("req %p pauserd\n", req);
2196 req->r_t.paused = true;
2197 maybe_request_map(osdc);
2198 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2199 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2200 CEPH_OSD_FLAG_FULL_FORCE)) &&
b7ec35b3 2201 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
5aea3dcd
ID		 2202 pool_full(osdc, req->r_t.base_oloc.pool))) {
2203 dout("req %p full/pool_full\n", req);
2204 pr_warn_ratelimited("FULL or reached pool quota\n");
2205 req->r_t.paused = true;
2206 maybe_request_map(osdc);
a1f4020a
JL		 2207 if (req->r_abort_on_full)
2208 need_abort = true;
5aea3dcd
ID		 2209 } else if (!osd_homeless(osd)) {
2210 need_send = true;
0bbfdfe8 2211 } else {
5aea3dcd 2212 maybe_request_map(osdc);
0bbfdfe8
ID		 2213 }
2214
5aea3dcd
ID		 2215 mutex_lock(&osd->lock);
2216 /*
2217 * Assign the tid atomically with send_request() to protect
2218 * multiple writes to the same object from racing with each
2219 * other, resulting in out of order ops on the OSDs.
2220 */
2221 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2222 link_request(osd, req);
2223 if (need_send)
2224 send_request(req);
a1f4020a
JL		 2225 else if (need_abort)
2226 complete_request(req, -ENOSPC);
5aea3dcd
ID		 2227 mutex_unlock(&osd->lock);
2228
4609245e
ID		 2229 if (ct_res == CALC_TARGET_POOL_DNE)
2230 send_map_check(req);
2231
5aea3dcd
ID		 2232 if (promoted)
2233 downgrade_write(&osdc->lock);
2234 return;
2235
2236promote:
2237 up_read(&osdc->lock);
2238 down_write(&osdc->lock);
2239 wrlocked = true;
2240 promoted = true;
2241 goto again;
2242}
2243
2244static void account_request(struct ceph_osd_request *req)
2245{
54ea0046 2246 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
b18b9550 2247 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
5aea3dcd 2248
b18b9550 2249 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
5aea3dcd 2250 atomic_inc(&req->r_osdc->num_requests);
7cc5e38f
ID		 2251
2252 req->r_start_stamp = jiffies;
5aea3dcd
ID		 2253}
2254
2255static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2256{
2257 ceph_osdc_get_request(req);
2258 account_request(req);
2259 __submit_request(req, wrlocked);
2260}
2261
45ee2c1d 2262static void finish_request(struct ceph_osd_request *req)
5aea3dcd
ID		 2263{
2264 struct ceph_osd_client *osdc = req->r_osdc;
5aea3dcd 2265
04c7d789 2266 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
5aea3dcd
ID		 2267 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2268
04c7d789
ID		 2269 if (req->r_osd)
2270 unlink_request(req->r_osd, req);
5aea3dcd
ID		 2271 atomic_dec(&osdc->num_requests);
2272
2273 /*
2274 * If an OSD has failed or returned and a request has been sent
2275 * twice, it's possible to get a reply and end up here while the
2276 * request message is queued for delivery. We will ignore the
2277 * reply, so not a big deal, but better to try and catch it.
2278 */
2279 ceph_msg_revoke(req->r_request);
2280 ceph_msg_revoke_incoming(req->r_reply);
2281}
2282
fe5da05e
ID		 2283static void __complete_request(struct ceph_osd_request *req)
2284{
b18b9550
ID		 2285 if (req->r_callback) {
2286 dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
2287 req->r_tid, req->r_callback, req->r_result);
fe5da05e 2288 req->r_callback(req);
b18b9550 2289 }
fe5da05e
ID		 2290}
2291
4609245e 2292/*
b18b9550 2293 * This is open-coded in handle_reply().
4609245e
ID		 2294 */
2295static void complete_request(struct ceph_osd_request *req, int err)
2296{
2297 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2298
2299 req->r_result = err;
45ee2c1d 2300 finish_request(req);
4609245e 2301 __complete_request(req);
b18b9550 2302 complete_all(&req->r_completion);
4609245e
ID		 2303 ceph_osdc_put_request(req);
2304}
2305
2306static void cancel_map_check(struct ceph_osd_request *req)
2307{
2308 struct ceph_osd_client *osdc = req->r_osdc;
2309 struct ceph_osd_request *lookup_req;
2310
2311 verify_osdc_wrlocked(osdc);
2312
2313 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2314 if (!lookup_req)
2315 return;
2316
2317 WARN_ON(lookup_req != req);
2318 erase_request_mc(&osdc->map_checks, req);
2319 ceph_osdc_put_request(req);
2320}
2321
5aea3dcd
ID		 2322static void cancel_request(struct ceph_osd_request *req)
2323{
2324 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2325
4609245e 2326 cancel_map_check(req);
45ee2c1d 2327 finish_request(req);
b18b9550 2328 complete_all(&req->r_completion);
c297eb42 2329 ceph_osdc_put_request(req);
5aea3dcd
ID		 2330}
2331
7cc5e38f
ID		 2332static void abort_request(struct ceph_osd_request *req, int err)
2333{
2334 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2335
2336 cancel_map_check(req);
2337 complete_request(req, err);
2338}
2339
58eb7932
JL		 2340static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2341{
2342 if (likely(eb > osdc->epoch_barrier)) {
2343 dout("updating epoch_barrier from %u to %u\n",
2344 osdc->epoch_barrier, eb);
2345 osdc->epoch_barrier = eb;
2346 /* Request map if we're not to the barrier yet */
2347 if (eb > osdc->osdmap->epoch)
2348 maybe_request_map(osdc);
2349 }
2350}
2351
2352void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2353{
2354 down_read(&osdc->lock);
2355 if (unlikely(eb > osdc->epoch_barrier)) {
2356 up_read(&osdc->lock);
2357 down_write(&osdc->lock);
2358 update_epoch_barrier(osdc, eb);
2359 up_write(&osdc->lock);
2360 } else {
2361 up_read(&osdc->lock);
2362 }
2363}
2364EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2365
fc36d0a4
JL		 2366/*
2367 * Drop all pending requests that are stalled waiting on a full condition to
58eb7932
JL		 2368 * clear, and complete them with ENOSPC as the return code. Set the
2369 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2370 * cancelled.
fc36d0a4
JL		 2371 */
2372static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2373{
2374 struct rb_node *n;
58eb7932 2375 bool victims = false;
fc36d0a4
JL		 2376
2377 dout("enter abort_on_full\n");
2378
2379 if (!ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !have_pool_full(osdc))
2380 goto out;
2381
58eb7932
JL		 2382 /* Scan list and see if there is anything to abort */
2383 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2384 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2385 struct rb_node *m;
2386
2387 m = rb_first(&osd->o_requests);
2388 while (m) {
2389 struct ceph_osd_request *req = rb_entry(m,
2390 struct ceph_osd_request, r_node);
2391 m = rb_next(m);
2392
2393 if (req->r_abort_on_full) {
2394 victims = true;
2395 break;
2396 }
2397 }
2398 if (victims)
2399 break;
2400 }
2401
2402 if (!victims)
2403 goto out;
2404
2405 /*
2406 * Update the barrier to current epoch if it's behind that point,
2407 * since we know we have some calls to be aborted in the tree.
2408 */
2409 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2410
fc36d0a4
JL		 2411 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2412 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2413 struct rb_node *m;
2414
2415 m = rb_first(&osd->o_requests);
2416 while (m) {
2417 struct ceph_osd_request *req = rb_entry(m,
2418 struct ceph_osd_request, r_node);
2419 m = rb_next(m);
2420
2421 if (req->r_abort_on_full &&
2422 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2423 pool_full(osdc, req->r_t.target_oloc.pool)))
2424 abort_request(req, -ENOSPC);
2425 }
2426 }
2427out:
58eb7932 2428 dout("return abort_on_full barrier=%u\n", osdc->epoch_barrier);
fc36d0a4
JL		 2429}
2430
4609245e
ID		 2431static void check_pool_dne(struct ceph_osd_request *req)
2432{
2433 struct ceph_osd_client *osdc = req->r_osdc;
2434 struct ceph_osdmap *map = osdc->osdmap;
2435
2436 verify_osdc_wrlocked(osdc);
2437 WARN_ON(!map->epoch);
2438
2439 if (req->r_attempts) {
2440 /*
2441 * We sent a request earlier, which means that
2442 * previously the pool existed, and now it does not
2443 * (i.e., it was deleted).
2444 */
2445 req->r_map_dne_bound = map->epoch;
2446 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2447 req->r_tid);
2448 } else {
2449 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2450 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2451 }
2452
2453 if (req->r_map_dne_bound) {
2454 if (map->epoch >= req->r_map_dne_bound) {
2455 /* we had a new enough map */
2456 pr_info_ratelimited("tid %llu pool does not exist\n",
2457 req->r_tid);
2458 complete_request(req, -ENOENT);
2459 }
2460 } else {
2461 send_map_check(req);
2462 }
2463}
2464
2465static void map_check_cb(struct ceph_mon_generic_request *greq)
2466{
2467 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2468 struct ceph_osd_request *req;
2469 u64 tid = greq->private_data;
2470
2471 WARN_ON(greq->result || !greq->u.newest);
2472
2473 down_write(&osdc->lock);
2474 req = lookup_request_mc(&osdc->map_checks, tid);
2475 if (!req) {
2476 dout("%s tid %llu dne\n", __func__, tid);
2477 goto out_unlock;
2478 }
2479
2480 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2481 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2482 if (!req->r_map_dne_bound)
2483 req->r_map_dne_bound = greq->u.newest;
2484 erase_request_mc(&osdc->map_checks, req);
2485 check_pool_dne(req);
2486
2487 ceph_osdc_put_request(req);
2488out_unlock:
2489 up_write(&osdc->lock);
2490}
2491
2492static void send_map_check(struct ceph_osd_request *req)
2493{
2494 struct ceph_osd_client *osdc = req->r_osdc;
2495 struct ceph_osd_request *lookup_req;
2496 int ret;
2497
2498 verify_osdc_wrlocked(osdc);
2499
2500 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2501 if (lookup_req) {
2502 WARN_ON(lookup_req != req);
2503 return;
2504 }
2505
2506 ceph_osdc_get_request(req);
2507 insert_request_mc(&osdc->map_checks, req);
2508 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2509 map_check_cb, req->r_tid);
2510 WARN_ON(ret);
2511}
2512
922dab61
ID		 2513/*
2514 * lingering requests, watch/notify v2 infrastructure
2515 */
2516static void linger_release(struct kref *kref)
2517{
2518 struct ceph_osd_linger_request *lreq =
2519 container_of(kref, struct ceph_osd_linger_request, kref);
2520
2521 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2522 lreq->reg_req, lreq->ping_req);
2523 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2524 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
4609245e 2525 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
922dab61 2526 WARN_ON(!list_empty(&lreq->scan_item));
b07d3c4b 2527 WARN_ON(!list_empty(&lreq->pending_lworks));
922dab61
ID		 2528 WARN_ON(lreq->osd);
2529
2530 if (lreq->reg_req)
2531 ceph_osdc_put_request(lreq->reg_req);
2532 if (lreq->ping_req)
2533 ceph_osdc_put_request(lreq->ping_req);
2534 target_destroy(&lreq->t);
2535 kfree(lreq);
2536}
2537
2538static void linger_put(struct ceph_osd_linger_request *lreq)
2539{
2540 if (lreq)
2541 kref_put(&lreq->kref, linger_release);
2542}
2543
2544static struct ceph_osd_linger_request *
2545linger_get(struct ceph_osd_linger_request *lreq)
2546{
2547 kref_get(&lreq->kref);
2548 return lreq;
2549}
2550
2551static struct ceph_osd_linger_request *
2552linger_alloc(struct ceph_osd_client *osdc)
2553{
2554 struct ceph_osd_linger_request *lreq;
2555
2556 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2557 if (!lreq)
2558 return NULL;
2559
2560 kref_init(&lreq->kref);
2561 mutex_init(&lreq->lock);
2562 RB_CLEAR_NODE(&lreq->node);
2563 RB_CLEAR_NODE(&lreq->osdc_node);
4609245e 2564 RB_CLEAR_NODE(&lreq->mc_node);
922dab61 2565 INIT_LIST_HEAD(&lreq->scan_item);
b07d3c4b 2566 INIT_LIST_HEAD(&lreq->pending_lworks);
922dab61 2567 init_completion(&lreq->reg_commit_wait);
19079203 2568 init_completion(&lreq->notify_finish_wait);
922dab61
ID		 2569
2570 lreq->osdc = osdc;
2571 target_init(&lreq->t);
2572
2573 dout("%s lreq %p\n", __func__, lreq);
2574 return lreq;
2575}
2576
2577DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2578DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
4609245e 2579DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
922dab61
ID		 2580
2581/*
2582 * Create linger request <-> OSD session relation.
2583 *
2584 * @lreq has to be registered, @osd may be homeless.
2585 */
2586static void link_linger(struct ceph_osd *osd,
2587 struct ceph_osd_linger_request *lreq)
2588{
2589 verify_osd_locked(osd);
2590 WARN_ON(!lreq->linger_id || lreq->osd);
2591 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2592 osd->o_osd, lreq, lreq->linger_id);
2593
2594 if (!osd_homeless(osd))
2595 __remove_osd_from_lru(osd);
2596 else
2597 atomic_inc(&osd->o_osdc->num_homeless);
2598
2599 get_osd(osd);
2600 insert_linger(&osd->o_linger_requests, lreq);
2601 lreq->osd = osd;
2602}
2603
2604static void unlink_linger(struct ceph_osd *osd,
2605 struct ceph_osd_linger_request *lreq)
2606{
2607 verify_osd_locked(osd);
2608 WARN_ON(lreq->osd != osd);
2609 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2610 osd->o_osd, lreq, lreq->linger_id);
2611
2612 lreq->osd = NULL;
2613 erase_linger(&osd->o_linger_requests, lreq);
2614 put_osd(osd);
2615
2616 if (!osd_homeless(osd))
2617 maybe_move_osd_to_lru(osd);
2618 else
2619 atomic_dec(&osd->o_osdc->num_homeless);
2620}
2621
2622static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2623{
2624 verify_osdc_locked(lreq->osdc);
2625
2626 return !RB_EMPTY_NODE(&lreq->osdc_node);
2627}
2628
2629static bool linger_registered(struct ceph_osd_linger_request *lreq)
2630{
2631 struct ceph_osd_client *osdc = lreq->osdc;
2632 bool registered;
2633
2634 down_read(&osdc->lock);
2635 registered = __linger_registered(lreq);
2636 up_read(&osdc->lock);
2637
2638 return registered;
2639}
2640
2641static void linger_register(struct ceph_osd_linger_request *lreq)
2642{
2643 struct ceph_osd_client *osdc = lreq->osdc;
2644
2645 verify_osdc_wrlocked(osdc);
2646 WARN_ON(lreq->linger_id);
2647
2648 linger_get(lreq);
2649 lreq->linger_id = ++osdc->last_linger_id;
2650 insert_linger_osdc(&osdc->linger_requests, lreq);
2651}
2652
2653static void linger_unregister(struct ceph_osd_linger_request *lreq)
2654{
2655 struct ceph_osd_client *osdc = lreq->osdc;
2656
2657 verify_osdc_wrlocked(osdc);
2658
2659 erase_linger_osdc(&osdc->linger_requests, lreq);
2660 linger_put(lreq);
2661}
2662
2663static void cancel_linger_request(struct ceph_osd_request *req)
2664{
2665 struct ceph_osd_linger_request *lreq = req->r_priv;
2666
2667 WARN_ON(!req->r_linger);
2668 cancel_request(req);
2669 linger_put(lreq);
2670}
2671
2672struct linger_work {
2673 struct work_struct work;
2674 struct ceph_osd_linger_request *lreq;
b07d3c4b
ID		 2675 struct list_head pending_item;
2676 unsigned long queued_stamp;
922dab61
ID		 2677
2678 union {
2679 struct {
2680 u64 notify_id;
2681 u64 notifier_id;
2682 void *payload; /* points into @msg front */
2683 size_t payload_len;
2684
2685 struct ceph_msg *msg; /* for ceph_msg_put() */
2686 } notify;
2687 struct {
2688 int err;
2689 } error;
2690 };
2691};
2692
2693static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2694 work_func_t workfn)
2695{
2696 struct linger_work *lwork;
2697
2698 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2699 if (!lwork)
2700 return NULL;
2701
2702 INIT_WORK(&lwork->work, workfn);
b07d3c4b 2703 INIT_LIST_HEAD(&lwork->pending_item);
922dab61
ID		 2704 lwork->lreq = linger_get(lreq);
2705
2706 return lwork;
2707}
2708
2709static void lwork_free(struct linger_work *lwork)
2710{
2711 struct ceph_osd_linger_request *lreq = lwork->lreq;
2712
b07d3c4b
ID		 2713 mutex_lock(&lreq->lock);
2714 list_del(&lwork->pending_item);
2715 mutex_unlock(&lreq->lock);
2716
922dab61
ID		 2717 linger_put(lreq);
2718 kfree(lwork);
2719}
2720
2721static void lwork_queue(struct linger_work *lwork)
2722{
2723 struct ceph_osd_linger_request *lreq = lwork->lreq;
2724 struct ceph_osd_client *osdc = lreq->osdc;
2725
2726 verify_lreq_locked(lreq);
b07d3c4b
ID		 2727 WARN_ON(!list_empty(&lwork->pending_item));
2728
2729 lwork->queued_stamp = jiffies;
2730 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
922dab61
ID		 2731 queue_work(osdc->notify_wq, &lwork->work);
2732}
2733
2734static void do_watch_notify(struct work_struct *w)
2735{
2736 struct linger_work *lwork = container_of(w, struct linger_work, work);
2737 struct ceph_osd_linger_request *lreq = lwork->lreq;
2738
2739 if (!linger_registered(lreq)) {
2740 dout("%s lreq %p not registered\n", __func__, lreq);
2741 goto out;
2742 }
2743
19079203 2744 WARN_ON(!lreq->is_watch);
922dab61
ID		 2745 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2746 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2747 lwork->notify.payload_len);
2748 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2749 lwork->notify.notifier_id, lwork->notify.payload,
2750 lwork->notify.payload_len);
2751
2752out:
2753 ceph_msg_put(lwork->notify.msg);
2754 lwork_free(lwork);
2755}
2756
2757static void do_watch_error(struct work_struct *w)
2758{
2759 struct linger_work *lwork = container_of(w, struct linger_work, work);
2760 struct ceph_osd_linger_request *lreq = lwork->lreq;
2761
2762 if (!linger_registered(lreq)) {
2763 dout("%s lreq %p not registered\n", __func__, lreq);
2764 goto out;
2765 }
2766
2767 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2768 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2769
2770out:
2771 lwork_free(lwork);
2772}
2773
2774static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2775{
2776 struct linger_work *lwork;
2777
2778 lwork = lwork_alloc(lreq, do_watch_error);
2779 if (!lwork) {
2780 pr_err("failed to allocate error-lwork\n");
2781 return;
2782 }
2783
2784 lwork->error.err = lreq->last_error;
2785 lwork_queue(lwork);
2786}
2787
2788static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2789 int result)
2790{
2791 if (!completion_done(&lreq->reg_commit_wait)) {
2792 lreq->reg_commit_error = (result <= 0 ? result : 0);
2793 complete_all(&lreq->reg_commit_wait);
2794 }
2795}
2796
2797static void linger_commit_cb(struct ceph_osd_request *req)
2798{
2799 struct ceph_osd_linger_request *lreq = req->r_priv;
2800
2801 mutex_lock(&lreq->lock);
2802 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2803 lreq->linger_id, req->r_result);
922dab61
ID		 2804 linger_reg_commit_complete(lreq, req->r_result);
2805 lreq->committed = true;
2806
19079203
ID		 2807 if (!lreq->is_watch) {
2808 struct ceph_osd_data *osd_data =
2809 osd_req_op_data(req, 0, notify, response_data);
2810 void *p = page_address(osd_data->pages[0]);
2811
2812 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2813 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2814
2815 /* make note of the notify_id */
2816 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2817 lreq->notify_id = ceph_decode_64(&p);
2818 dout("lreq %p notify_id %llu\n", lreq,
2819 lreq->notify_id);
2820 } else {
2821 dout("lreq %p no notify_id\n", lreq);
2822 }
2823 }
2824
922dab61
ID		 2825 mutex_unlock(&lreq->lock);
2826 linger_put(lreq);
2827}
2828
2829static int normalize_watch_error(int err)
2830{
2831 /*
2832 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2833 * notification and a failure to reconnect because we raced with
2834 * the delete appear the same to the user.
2835 */
2836 if (err == -ENOENT)
2837 err = -ENOTCONN;
2838
2839 return err;
2840}
2841
2842static void linger_reconnect_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 last_error %d\n", __func__,
2848 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2849 if (req->r_result < 0) {
2850 if (!lreq->last_error) {
2851 lreq->last_error = normalize_watch_error(req->r_result);
2852 queue_watch_error(lreq);
2853 }
2854 }
2855
2856 mutex_unlock(&lreq->lock);
2857 linger_put(lreq);
2858}
2859
2860static void send_linger(struct ceph_osd_linger_request *lreq)
2861{
2862 struct ceph_osd_request *req = lreq->reg_req;
2863 struct ceph_osd_req_op *op = &req->r_ops[0];
2864
2865 verify_osdc_wrlocked(req->r_osdc);
2866 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2867
2868 if (req->r_osd)
2869 cancel_linger_request(req);
2870
2871 request_reinit(req);
2872 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2873 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2874 req->r_flags = lreq->t.flags;
2875 req->r_mtime = lreq->mtime;
2876
2877 mutex_lock(&lreq->lock);
19079203 2878 if (lreq->is_watch && lreq->committed) {
922dab61
ID		 2879 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2880 op->watch.cookie != lreq->linger_id);
2881 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2882 op->watch.gen = ++lreq->register_gen;
2883 dout("lreq %p reconnect register_gen %u\n", lreq,
2884 op->watch.gen);
2885 req->r_callback = linger_reconnect_cb;
2886 } else {
19079203
ID		 2887 if (!lreq->is_watch)
2888 lreq->notify_id = 0;
2889 else
2890 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 2891 dout("lreq %p register\n", lreq);
2892 req->r_callback = linger_commit_cb;
2893 }
2894 mutex_unlock(&lreq->lock);
2895
2896 req->r_priv = linger_get(lreq);
2897 req->r_linger = true;
2898
2899 submit_request(req, true);
2900}
2901
2902static void linger_ping_cb(struct ceph_osd_request *req)
2903{
2904 struct ceph_osd_linger_request *lreq = req->r_priv;
2905
2906 mutex_lock(&lreq->lock);
2907 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
2908 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
2909 lreq->last_error);
2910 if (lreq->register_gen == req->r_ops[0].watch.gen) {
b07d3c4b
ID		 2911 if (!req->r_result) {
2912 lreq->watch_valid_thru = lreq->ping_sent;
2913 } else if (!lreq->last_error) {
922dab61
ID		 2914 lreq->last_error = normalize_watch_error(req->r_result);
2915 queue_watch_error(lreq);
2916 }
2917 } else {
2918 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
2919 lreq->register_gen, req->r_ops[0].watch.gen);
2920 }
2921
2922 mutex_unlock(&lreq->lock);
2923 linger_put(lreq);
2924}
2925
2926static void send_linger_ping(struct ceph_osd_linger_request *lreq)
2927{
2928 struct ceph_osd_client *osdc = lreq->osdc;
2929 struct ceph_osd_request *req = lreq->ping_req;
2930 struct ceph_osd_req_op *op = &req->r_ops[0];
2931
b7ec35b3 2932 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
922dab61
ID		 2933 dout("%s PAUSERD\n", __func__);
2934 return;
2935 }
2936
2937 lreq->ping_sent = jiffies;
2938 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
2939 __func__, lreq, lreq->linger_id, lreq->ping_sent,
2940 lreq->register_gen);
2941
2942 if (req->r_osd)
2943 cancel_linger_request(req);
2944
2945 request_reinit(req);
2946 target_copy(&req->r_t, &lreq->t);
2947
2948 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2949 op->watch.cookie != lreq->linger_id ||
2950 op->watch.op != CEPH_OSD_WATCH_OP_PING);
2951 op->watch.gen = lreq->register_gen;
2952 req->r_callback = linger_ping_cb;
2953 req->r_priv = linger_get(lreq);
2954 req->r_linger = true;
2955
2956 ceph_osdc_get_request(req);
2957 account_request(req);
2958 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2959 link_request(lreq->osd, req);
2960 send_request(req);
2961}
2962
2963static void linger_submit(struct ceph_osd_linger_request *lreq)
2964{
2965 struct ceph_osd_client *osdc = lreq->osdc;
2966 struct ceph_osd *osd;
2967
7de030d6 2968 calc_target(osdc, &lreq->t, NULL, false);
922dab61
ID		 2969 osd = lookup_create_osd(osdc, lreq->t.osd, true);
2970 link_linger(osd, lreq);
2971
2972 send_linger(lreq);
2973}
2974
4609245e
ID		 2975static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
2976{
2977 struct ceph_osd_client *osdc = lreq->osdc;
2978 struct ceph_osd_linger_request *lookup_lreq;
2979
2980 verify_osdc_wrlocked(osdc);
2981
2982 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2983 lreq->linger_id);
2984 if (!lookup_lreq)
2985 return;
2986
2987 WARN_ON(lookup_lreq != lreq);
2988 erase_linger_mc(&osdc->linger_map_checks, lreq);
2989 linger_put(lreq);
2990}
2991
922dab61
ID		 2992/*
2993 * @lreq has to be both registered and linked.
2994 */
2995static void __linger_cancel(struct ceph_osd_linger_request *lreq)
2996{
19079203 2997 if (lreq->is_watch && lreq->ping_req->r_osd)
922dab61
ID		 2998 cancel_linger_request(lreq->ping_req);
2999 if (lreq->reg_req->r_osd)
3000 cancel_linger_request(lreq->reg_req);
4609245e 3001 cancel_linger_map_check(lreq);
922dab61
ID		 3002 unlink_linger(lreq->osd, lreq);
3003 linger_unregister(lreq);
3004}
3005
3006static void linger_cancel(struct ceph_osd_linger_request *lreq)
3007{
3008 struct ceph_osd_client *osdc = lreq->osdc;
3009
3010 down_write(&osdc->lock);
3011 if (__linger_registered(lreq))
3012 __linger_cancel(lreq);
3013 up_write(&osdc->lock);
3014}
3015
4609245e
ID		 3016static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3017
3018static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3019{
3020 struct ceph_osd_client *osdc = lreq->osdc;
3021 struct ceph_osdmap *map = osdc->osdmap;
3022
3023 verify_osdc_wrlocked(osdc);
3024 WARN_ON(!map->epoch);
3025
3026 if (lreq->register_gen) {
3027 lreq->map_dne_bound = map->epoch;
3028 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3029 lreq, lreq->linger_id);
3030 } else {
3031 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3032 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3033 map->epoch);
3034 }
3035
3036 if (lreq->map_dne_bound) {
3037 if (map->epoch >= lreq->map_dne_bound) {
3038 /* we had a new enough map */
3039 pr_info("linger_id %llu pool does not exist\n",
3040 lreq->linger_id);
3041 linger_reg_commit_complete(lreq, -ENOENT);
3042 __linger_cancel(lreq);
3043 }
3044 } else {
3045 send_linger_map_check(lreq);
3046 }
3047}
3048
3049static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3050{
3051 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3052 struct ceph_osd_linger_request *lreq;
3053 u64 linger_id = greq->private_data;
3054
3055 WARN_ON(greq->result || !greq->u.newest);
3056
3057 down_write(&osdc->lock);
3058 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3059 if (!lreq) {
3060 dout("%s linger_id %llu dne\n", __func__, linger_id);
3061 goto out_unlock;
3062 }
3063
3064 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3065 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3066 greq->u.newest);
3067 if (!lreq->map_dne_bound)
3068 lreq->map_dne_bound = greq->u.newest;
3069 erase_linger_mc(&osdc->linger_map_checks, lreq);
3070 check_linger_pool_dne(lreq);
3071
3072 linger_put(lreq);
3073out_unlock:
3074 up_write(&osdc->lock);
3075}
3076
3077static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3078{
3079 struct ceph_osd_client *osdc = lreq->osdc;
3080 struct ceph_osd_linger_request *lookup_lreq;
3081 int ret;
3082
3083 verify_osdc_wrlocked(osdc);
3084
3085 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3086 lreq->linger_id);
3087 if (lookup_lreq) {
3088 WARN_ON(lookup_lreq != lreq);
3089 return;
3090 }
3091
3092 linger_get(lreq);
3093 insert_linger_mc(&osdc->linger_map_checks, lreq);
3094 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3095 linger_map_check_cb, lreq->linger_id);
3096 WARN_ON(ret);
3097}
3098
922dab61
ID		 3099static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3100{
3101 int ret;
3102
3103 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3104 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3105 return ret ?: lreq->reg_commit_error;
3106}
3107
19079203
ID		 3108static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3109{
3110 int ret;
3111
3112 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3113 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3114 return ret ?: lreq->notify_finish_error;
3115}
3116
f24e9980 3117/*
fbca9635
ID		 3118 * Timeout callback, called every N seconds. When 1 or more OSD
3119 * requests has been active for more than N seconds, we send a keepalive
3120 * (tag + timestamp) to its OSD to ensure any communications channel
3121 * reset is detected.
f24e9980
SW		 3122 */
3123static void handle_timeout(struct work_struct *work)
3124{
3125 struct ceph_osd_client *osdc =
3126 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 3127 struct ceph_options *opts = osdc->client->options;
5aea3dcd 3128 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
7cc5e38f 3129 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
5aea3dcd
ID		 3130 LIST_HEAD(slow_osds);
3131 struct rb_node *n, *p;
f24e9980 3132
5aea3dcd
ID		 3133 dout("%s osdc %p\n", __func__, osdc);
3134 down_write(&osdc->lock);
f24e9980 3135
422d2cb8
YS		 3136 /*
3137 * ping osds that are a bit slow. this ensures that if there
3138 * is a break in the TCP connection we will notice, and reopen
3139 * a connection with that osd (from the fault callback).
3140 */
5aea3dcd
ID		 3141 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3142 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3143 bool found = false;
3144
7cc5e38f 3145 for (p = rb_first(&osd->o_requests); p; ) {
5aea3dcd
ID		 3146 struct ceph_osd_request *req =
3147 rb_entry(p, struct ceph_osd_request, r_node);
3148
7cc5e38f
ID		 3149 p = rb_next(p); /* abort_request() */
3150
5aea3dcd
ID		 3151 if (time_before(req->r_stamp, cutoff)) {
3152 dout(" req %p tid %llu on osd%d is laggy\n",
3153 req, req->r_tid, osd->o_osd);
3154 found = true;
3155 }
7cc5e38f
ID		 3156 if (opts->osd_request_timeout &&
3157 time_before(req->r_start_stamp, expiry_cutoff)) {
3158 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3159 req->r_tid, osd->o_osd);
3160 abort_request(req, -ETIMEDOUT);
3161 }
5aea3dcd 3162 }
922dab61
ID		 3163 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3164 struct ceph_osd_linger_request *lreq =
3165 rb_entry(p, struct ceph_osd_linger_request, node);
3166
3167 dout(" lreq %p linger_id %llu is served by osd%d\n",
3168 lreq, lreq->linger_id, osd->o_osd);
3169 found = true;
3170
3171 mutex_lock(&lreq->lock);
19079203 3172 if (lreq->is_watch && lreq->committed && !lreq->last_error)
922dab61
ID		 3173 send_linger_ping(lreq);
3174 mutex_unlock(&lreq->lock);
3175 }
422d2cb8 3176
5aea3dcd
ID		 3177 if (found)
3178 list_move_tail(&osd->o_keepalive_item, &slow_osds);
422d2cb8 3179 }
5aea3dcd 3180
7cc5e38f
ID		 3181 if (opts->osd_request_timeout) {
3182 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3183 struct ceph_osd_request *req =
3184 rb_entry(p, struct ceph_osd_request, r_node);
3185
3186 p = rb_next(p); /* abort_request() */
3187
3188 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3189 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3190 req->r_tid, osdc->homeless_osd.o_osd);
3191 abort_request(req, -ETIMEDOUT);
3192 }
3193 }
3194 }
3195
5aea3dcd
ID		 3196 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3197 maybe_request_map(osdc);
3198
422d2cb8 3199 while (!list_empty(&slow_osds)) {
5aea3dcd
ID		 3200 struct ceph_osd *osd = list_first_entry(&slow_osds,
3201 struct ceph_osd,
3202 o_keepalive_item);
422d2cb8 3203 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 3204 ceph_con_keepalive(&osd->o_con);
3205 }
3206
5aea3dcd 3207 up_write(&osdc->lock);
fbca9635
ID		 3208 schedule_delayed_work(&osdc->timeout_work,
3209 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 3210}
3211
f5a2041b
YS		 3212static void handle_osds_timeout(struct work_struct *work)
3213{
3214 struct ceph_osd_client *osdc =
3215 container_of(work, struct ceph_osd_client,
3216 osds_timeout_work.work);
a319bf56 3217 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 3218 struct ceph_osd *osd, *nosd;
f5a2041b 3219
42a2c09f 3220 dout("%s osdc %p\n", __func__, osdc);
5aea3dcd 3221 down_write(&osdc->lock);
42a2c09f
ID		 3222 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3223 if (time_before(jiffies, osd->lru_ttl))
3224 break;
3225
5aea3dcd 3226 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 3227 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
5aea3dcd 3228 close_osd(osd);
42a2c09f 3229 }
f5a2041b 3230
5aea3dcd 3231 up_write(&osdc->lock);
f5a2041b
YS		 3232 schedule_delayed_work(&osdc->osds_timeout_work,
3233 round_jiffies_relative(delay));
3234}
3235
205ee118
ID		 3236static int ceph_oloc_decode(void **p, void *end,
3237 struct ceph_object_locator *oloc)
3238{
3239 u8 struct_v, struct_cv;
3240 u32 len;
3241 void *struct_end;
3242 int ret = 0;
3243
3244 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3245 struct_v = ceph_decode_8(p);
3246 struct_cv = ceph_decode_8(p);
3247 if (struct_v < 3) {
3248 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3249 struct_v, struct_cv);
3250 goto e_inval;
3251 }
3252 if (struct_cv > 6) {
3253 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3254 struct_v, struct_cv);
3255 goto e_inval;
3256 }
3257 len = ceph_decode_32(p);
3258 ceph_decode_need(p, end, len, e_inval);
3259 struct_end = *p + len;
3260
3261 oloc->pool = ceph_decode_64(p);
3262 *p += 4; /* skip preferred */
3263
3264 len = ceph_decode_32(p);
3265 if (len > 0) {
3266 pr_warn("ceph_object_locator::key is set\n");
3267 goto e_inval;
3268 }
3269
3270 if (struct_v >= 5) {
cd08e0a2
YZ		 3271 bool changed = false;
3272
205ee118
ID		 3273 len = ceph_decode_32(p);
3274 if (len > 0) {
30c156d9 3275 ceph_decode_need(p, end, len, e_inval);
cd08e0a2
YZ		 3276 if (!oloc->pool_ns ||
3277 ceph_compare_string(oloc->pool_ns, *p, len))
3278 changed = true;
30c156d9 3279 *p += len;
cd08e0a2
YZ		 3280 } else {
3281 if (oloc->pool_ns)
3282 changed = true;
3283 }
3284 if (changed) {
3285 /* redirect changes namespace */
3286 pr_warn("ceph_object_locator::nspace is changed\n");
3287 goto e_inval;
205ee118
ID		 3288 }
3289 }
3290
3291 if (struct_v >= 6) {
3292 s64 hash = ceph_decode_64(p);
3293 if (hash != -1) {
3294 pr_warn("ceph_object_locator::hash is set\n");
3295 goto e_inval;
3296 }
3297 }
3298
3299 /* skip the rest */
3300 *p = struct_end;
3301out:
3302 return ret;
3303
3304e_inval:
3305 ret = -EINVAL;
3306 goto out;
3307}
3308
3309static int ceph_redirect_decode(void **p, void *end,
3310 struct ceph_request_redirect *redir)
3311{
3312 u8 struct_v, struct_cv;
3313 u32 len;
3314 void *struct_end;
3315 int ret;
3316
3317 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3318 struct_v = ceph_decode_8(p);
3319 struct_cv = ceph_decode_8(p);
3320 if (struct_cv > 1) {
3321 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3322 struct_v, struct_cv);
3323 goto e_inval;
3324 }
3325 len = ceph_decode_32(p);
3326 ceph_decode_need(p, end, len, e_inval);
3327 struct_end = *p + len;
3328
3329 ret = ceph_oloc_decode(p, end, &redir->oloc);
3330 if (ret)
3331 goto out;
3332
3333 len = ceph_decode_32(p);
3334 if (len > 0) {
3335 pr_warn("ceph_request_redirect::object_name is set\n");
3336 goto e_inval;
3337 }
3338
3339 len = ceph_decode_32(p);
3340 *p += len; /* skip osd_instructions */
3341
3342 /* skip the rest */
3343 *p = struct_end;
3344out:
3345 return ret;
3346
3347e_inval:
3348 ret = -EINVAL;
3349 goto out;
3350}
3351
fe5da05e
ID		 3352struct MOSDOpReply {
3353 struct ceph_pg pgid;
3354 u64 flags;
3355 int result;
3356 u32 epoch;
3357 int num_ops;
3358 u32 outdata_len[CEPH_OSD_MAX_OPS];
3359 s32 rval[CEPH_OSD_MAX_OPS];
3360 int retry_attempt;
3361 struct ceph_eversion replay_version;
3362 u64 user_version;
3363 struct ceph_request_redirect redirect;
3364};
25845472 3365
fe5da05e 3366static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 3367{
fe5da05e
ID		 3368 void *p = msg->front.iov_base;
3369 void *const end = p + msg->front.iov_len;
3370 u16 version = le16_to_cpu(msg->hdr.version);
3371 struct ceph_eversion bad_replay_version;
b0b31a8f 3372 u8 decode_redir;
fe5da05e
ID		 3373 u32 len;
3374 int ret;
3375 int i;
1b83bef2 3376
fe5da05e
ID		 3377 ceph_decode_32_safe(&p, end, len, e_inval);
3378 ceph_decode_need(&p, end, len, e_inval);
3379 p += len; /* skip oid */
1b83bef2 3380
fe5da05e
ID		 3381 ret = ceph_decode_pgid(&p, end, &m->pgid);
3382 if (ret)
3383 return ret;
1b83bef2 3384
fe5da05e
ID		 3385 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3386 ceph_decode_32_safe(&p, end, m->result, e_inval);
3387 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3388 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3389 p += sizeof(bad_replay_version);
3390 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 3391
fe5da05e
ID		 3392 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3393 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3394 goto e_inval;
1b83bef2 3395
fe5da05e
ID		 3396 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3397 e_inval);
3398 for (i = 0; i < m->num_ops; i++) {
1b83bef2 3399 struct ceph_osd_op *op = p;
1b83bef2 3400
fe5da05e 3401 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 3402 p += sizeof(*op);
3403 }
1b83bef2 3404
fe5da05e
ID		 3405 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3406 for (i = 0; i < m->num_ops; i++)
3407 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 3408
fe5da05e
ID		 3409 if (version >= 5) {
3410 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3411 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3412 p += sizeof(m->replay_version);
3413 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3414 } else {
3415 m->replay_version = bad_replay_version; /* struct */
3416 m->user_version = le64_to_cpu(m->replay_version.version);
3417 }
eb845ff1 3418
fe5da05e
ID		 3419 if (version >= 6) {
3420 if (version >= 7)
3421 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 3422 else
3423 decode_redir = 1;
3424 } else {
3425 decode_redir = 0;
3426 }
3427
3428 if (decode_redir) {
fe5da05e
ID		 3429 ret = ceph_redirect_decode(&p, end, &m->redirect);
3430 if (ret)
3431 return ret;
205ee118 3432 } else {
fe5da05e 3433 ceph_oloc_init(&m->redirect.oloc);
205ee118 3434 }
f24e9980 3435
fe5da05e
ID		 3436 return 0;
3437
3438e_inval:
3439 return -EINVAL;
3440}
3441
3442/*
b18b9550
ID		 3443 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3444 * specified.
fe5da05e 3445 */
5aea3dcd 3446static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
fe5da05e 3447{
5aea3dcd 3448 struct ceph_osd_client *osdc = osd->o_osdc;
fe5da05e
ID		 3449 struct ceph_osd_request *req;
3450 struct MOSDOpReply m;
3451 u64 tid = le64_to_cpu(msg->hdr.tid);
3452 u32 data_len = 0;
fe5da05e
ID		 3453 int ret;
3454 int i;
3455
3456 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3457
5aea3dcd
ID		 3458 down_read(&osdc->lock);
3459 if (!osd_registered(osd)) {
3460 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3461 goto out_unlock_osdc;
3462 }
3463 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3464
3465 mutex_lock(&osd->lock);
3466 req = lookup_request(&osd->o_requests, tid);
fe5da05e 3467 if (!req) {
5aea3dcd
ID		 3468 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3469 goto out_unlock_session;
fe5da05e 3470 }
fe5da05e 3471
cd08e0a2 3472 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
fe5da05e 3473 ret = decode_MOSDOpReply(msg, &m);
cd08e0a2 3474 m.redirect.oloc.pool_ns = NULL;
fe5da05e
ID		 3475 if (ret) {
3476 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3477 req->r_tid, ret);
3478 ceph_msg_dump(msg);
3479 goto fail_request;
3480 }
3481 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3482 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3483 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3484 le64_to_cpu(m.replay_version.version), m.user_version);
3485
3486 if (m.retry_attempt >= 0) {
3487 if (m.retry_attempt != req->r_attempts - 1) {
3488 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3489 req, req->r_tid, m.retry_attempt,
3490 req->r_attempts - 1);
5aea3dcd 3491 goto out_unlock_session;
fe5da05e
ID		 3492 }
3493 } else {
3494 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3495 }
3496
3497 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3498 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3499 m.redirect.oloc.pool);
5aea3dcd
ID		 3500 unlink_request(osd, req);
3501 mutex_unlock(&osd->lock);
205ee118 3502
30c156d9
YZ		 3503 /*
3504 * Not ceph_oloc_copy() - changing pool_ns is not
3505 * supported.
3506 */
3507 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
5aea3dcd
ID		 3508 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
3509 req->r_tid = 0;
3510 __submit_request(req, false);
3511 goto out_unlock_osdc;
205ee118
ID		 3512 }
3513
fe5da05e
ID		 3514 if (m.num_ops != req->r_num_ops) {
3515 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3516 req->r_num_ops, req->r_tid);
3517 goto fail_request;
f24e9980 3518 }
fe5da05e
ID		 3519 for (i = 0; i < req->r_num_ops; i++) {
3520 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3521 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3522 req->r_ops[i].rval = m.rval[i];
3523 req->r_ops[i].outdata_len = m.outdata_len[i];
3524 data_len += m.outdata_len[i];
3525 }
3526 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3527 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3528 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3529 goto fail_request;
3530 }
b18b9550
ID		 3531 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3532 req, req->r_tid, m.result, data_len);
f24e9980 3533
b18b9550
ID		 3534 /*
3535 * Since we only ever request ONDISK, we should only ever get
3536 * one (type of) reply back.
3537 */
3538 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3539 req->r_result = m.result ?: data_len;
3540 finish_request(req);
5aea3dcd
ID		 3541 mutex_unlock(&osd->lock);
3542 up_read(&osdc->lock);
f24e9980 3543
b18b9550
ID		 3544 __complete_request(req);
3545 complete_all(&req->r_completion);
3546 ceph_osdc_put_request(req);
f24e9980
SW		 3547 return;
3548
fe5da05e 3549fail_request:
4609245e 3550 complete_request(req, -EIO);
5aea3dcd
ID		 3551out_unlock_session:
3552 mutex_unlock(&osd->lock);
3553out_unlock_osdc:
3554 up_read(&osdc->lock);
f24e9980
SW		 3555}
3556
42c1b124
ID		 3557static void set_pool_was_full(struct ceph_osd_client *osdc)
3558{
3559 struct rb_node *n;
3560
3561 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3562 struct ceph_pg_pool_info *pi =
3563 rb_entry(n, struct ceph_pg_pool_info, node);
3564
3565 pi->was_full = __pool_full(pi);
3566 }
3567}
3568
5aea3dcd 3569static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
f24e9980 3570{
5aea3dcd 3571 struct ceph_pg_pool_info *pi;
f24e9980 3572
5aea3dcd
ID		 3573 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3574 if (!pi)
3575 return false;
f24e9980 3576
5aea3dcd 3577 return pi->was_full && !__pool_full(pi);
422d2cb8
YS		 3578}
3579
922dab61
ID		 3580static enum calc_target_result
3581recalc_linger_target(struct ceph_osd_linger_request *lreq)
3582{
3583 struct ceph_osd_client *osdc = lreq->osdc;
3584 enum calc_target_result ct_res;
3585
7de030d6 3586 ct_res = calc_target(osdc, &lreq->t, NULL, true);
922dab61
ID		 3587 if (ct_res == CALC_TARGET_NEED_RESEND) {
3588 struct ceph_osd *osd;
3589
3590 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3591 if (osd != lreq->osd) {
3592 unlink_linger(lreq->osd, lreq);
3593 link_linger(osd, lreq);
3594 }
3595 }
3596
3597 return ct_res;
3598}
3599
422d2cb8 3600/*
5aea3dcd 3601 * Requeue requests whose mapping to an OSD has changed.
422d2cb8 3602 */
5aea3dcd
ID		 3603static void scan_requests(struct ceph_osd *osd,
3604 bool force_resend,
3605 bool cleared_full,
3606 bool check_pool_cleared_full,
3607 struct rb_root *need_resend,
3608 struct list_head *need_resend_linger)
422d2cb8 3609{
5aea3dcd
ID		 3610 struct ceph_osd_client *osdc = osd->o_osdc;
3611 struct rb_node *n;
3612 bool force_resend_writes;
3613
922dab61
ID		 3614 for (n = rb_first(&osd->o_linger_requests); n; ) {
3615 struct ceph_osd_linger_request *lreq =
3616 rb_entry(n, struct ceph_osd_linger_request, node);
3617 enum calc_target_result ct_res;
3618
3619 n = rb_next(n); /* recalc_linger_target() */
3620
3621 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3622 lreq->linger_id);
3623 ct_res = recalc_linger_target(lreq);
3624 switch (ct_res) {
3625 case CALC_TARGET_NO_ACTION:
3626 force_resend_writes = cleared_full ||
3627 (check_pool_cleared_full &&
3628 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3629 if (!force_resend && !force_resend_writes)
3630 break;
3631
3632 /* fall through */
3633 case CALC_TARGET_NEED_RESEND:
4609245e 3634 cancel_linger_map_check(lreq);
922dab61
ID		 3635 /*
3636 * scan_requests() for the previous epoch(s)
3637 * may have already added it to the list, since
3638 * it's not unlinked here.
3639 */
3640 if (list_empty(&lreq->scan_item))
3641 list_add_tail(&lreq->scan_item, need_resend_linger);
3642 break;
3643 case CALC_TARGET_POOL_DNE:
a10bcb19 3644 list_del_init(&lreq->scan_item);
4609245e 3645 check_linger_pool_dne(lreq);
922dab61
ID		 3646 break;
3647 }
3648 }
3649
5aea3dcd
ID		 3650 for (n = rb_first(&osd->o_requests); n; ) {
3651 struct ceph_osd_request *req =
3652 rb_entry(n, struct ceph_osd_request, r_node);
3653 enum calc_target_result ct_res;
3654
4609245e 3655 n = rb_next(n); /* unlink_request(), check_pool_dne() */
5aea3dcd
ID		 3656
3657 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
7de030d6
ID		 3658 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
3659 false);
5aea3dcd
ID		 3660 switch (ct_res) {
3661 case CALC_TARGET_NO_ACTION:
3662 force_resend_writes = cleared_full ||
3663 (check_pool_cleared_full &&
3664 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3665 if (!force_resend &&
3666 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3667 !force_resend_writes))
3668 break;
3669
3670 /* fall through */
3671 case CALC_TARGET_NEED_RESEND:
4609245e 3672 cancel_map_check(req);
5aea3dcd
ID		 3673 unlink_request(osd, req);
3674 insert_request(need_resend, req);
3675 break;
3676 case CALC_TARGET_POOL_DNE:
4609245e 3677 check_pool_dne(req);
5aea3dcd 3678 break;
b0494532 3679 }
6f6c7006 3680 }
422d2cb8 3681}
6f6c7006 3682
42c1b124 3683static int handle_one_map(struct ceph_osd_client *osdc,
5aea3dcd
ID		 3684 void *p, void *end, bool incremental,
3685 struct rb_root *need_resend,
3686 struct list_head *need_resend_linger)
42c1b124
ID		 3687{
3688 struct ceph_osdmap *newmap;
3689 struct rb_node *n;
3690 bool skipped_map = false;
3691 bool was_full;
3692
b7ec35b3 3693 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
42c1b124
ID		 3694 set_pool_was_full(osdc);
3695
3696 if (incremental)
3697 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3698 else
3699 newmap = ceph_osdmap_decode(&p, end);
3700 if (IS_ERR(newmap))
3701 return PTR_ERR(newmap);
3702
3703 if (newmap != osdc->osdmap) {
3704 /*
3705 * Preserve ->was_full before destroying the old map.
3706 * For pools that weren't in the old map, ->was_full
3707 * should be false.
3708 */
3709 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3710 struct ceph_pg_pool_info *pi =
3711 rb_entry(n, struct ceph_pg_pool_info, node);
3712 struct ceph_pg_pool_info *old_pi;
3713
3714 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3715 if (old_pi)
3716 pi->was_full = old_pi->was_full;
3717 else
3718 WARN_ON(pi->was_full);
3719 }
3720
3721 if (osdc->osdmap->epoch &&
3722 osdc->osdmap->epoch + 1 < newmap->epoch) {
3723 WARN_ON(incremental);
3724 skipped_map = true;
3725 }
3726
3727 ceph_osdmap_destroy(osdc->osdmap);
3728 osdc->osdmap = newmap;
3729 }
3730
b7ec35b3 3731 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
5aea3dcd
ID		 3732 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3733 need_resend, need_resend_linger);
3734
3735 for (n = rb_first(&osdc->osds); n; ) {
3736 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3737
3738 n = rb_next(n); /* close_osd() */
3739
3740 scan_requests(osd, skipped_map, was_full, true, need_resend,
3741 need_resend_linger);
3742 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3743 memcmp(&osd->o_con.peer_addr,
3744 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3745 sizeof(struct ceph_entity_addr)))
3746 close_osd(osd);
3747 }
42c1b124
ID		 3748
3749 return 0;
3750}
6f6c7006 3751
5aea3dcd
ID		 3752static void kick_requests(struct ceph_osd_client *osdc,
3753 struct rb_root *need_resend,
3754 struct list_head *need_resend_linger)
3755{
922dab61 3756 struct ceph_osd_linger_request *lreq, *nlreq;
04c7d789 3757 enum calc_target_result ct_res;
5aea3dcd
ID		 3758 struct rb_node *n;
3759
04c7d789
ID		 3760 /* make sure need_resend targets reflect latest map */
3761 for (n = rb_first(need_resend); n; ) {
3762 struct ceph_osd_request *req =
3763 rb_entry(n, struct ceph_osd_request, r_node);
3764
3765 n = rb_next(n);
3766
3767 if (req->r_t.epoch < osdc->osdmap->epoch) {
3768 ct_res = calc_target(osdc, &req->r_t, NULL, false);
3769 if (ct_res == CALC_TARGET_POOL_DNE) {
3770 erase_request(need_resend, req);
3771 check_pool_dne(req);
3772 }
3773 }
3774 }
3775
5aea3dcd
ID		 3776 for (n = rb_first(need_resend); n; ) {
3777 struct ceph_osd_request *req =
3778 rb_entry(n, struct ceph_osd_request, r_node);
3779 struct ceph_osd *osd;
3780
3781 n = rb_next(n);
3782 erase_request(need_resend, req); /* before link_request() */
3783
5aea3dcd
ID		 3784 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3785 link_request(osd, req);
3786 if (!req->r_linger) {
3787 if (!osd_homeless(osd) && !req->r_t.paused)
3788 send_request(req);
922dab61
ID		 3789 } else {
3790 cancel_linger_request(req);
5aea3dcd
ID		 3791 }
3792 }
922dab61
ID		 3793
3794 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3795 if (!osd_homeless(lreq->osd))
3796 send_linger(lreq);
3797
3798 list_del_init(&lreq->scan_item);
3799 }
5aea3dcd
ID		 3800}
3801
f24e9980
SW		 3802/*
3803 * Process updated osd map.
3804 *
3805 * The message contains any number of incremental and full maps, normally
3806 * indicating some sort of topology change in the cluster. Kick requests
3807 * off to different OSDs as needed.
3808 */
3809void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3810{
42c1b124
ID		 3811 void *p = msg->front.iov_base;
3812 void *const end = p + msg->front.iov_len;
f24e9980
SW		 3813 u32 nr_maps, maplen;
3814 u32 epoch;
f24e9980 3815 struct ceph_fsid fsid;
5aea3dcd
ID		 3816 struct rb_root need_resend = RB_ROOT;
3817 LIST_HEAD(need_resend_linger);
42c1b124
ID		 3818 bool handled_incremental = false;
3819 bool was_pauserd, was_pausewr;
3820 bool pauserd, pausewr;
3821 int err;
f24e9980 3822
42c1b124 3823 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
5aea3dcd 3824 down_write(&osdc->lock);
f24e9980
SW		 3825
3826 /* verify fsid */
3827 ceph_decode_need(&p, end, sizeof(fsid), bad);
3828 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 3829 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 3830 goto bad;
f24e9980 3831
b7ec35b3
ID		 3832 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3833 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3834 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3835 have_pool_full(osdc);
9a1ea2db 3836
f24e9980
SW		 3837 /* incremental maps */
3838 ceph_decode_32_safe(&p, end, nr_maps, bad);
3839 dout(" %d inc maps\n", nr_maps);
3840 while (nr_maps > 0) {
3841 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3842 epoch = ceph_decode_32(&p);
3843 maplen = ceph_decode_32(&p);
f24e9980 3844 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 3845 if (osdc->osdmap->epoch &&
3846 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 3847 dout("applying incremental map %u len %d\n",
3848 epoch, maplen);
5aea3dcd
ID		 3849 err = handle_one_map(osdc, p, p + maplen, true,
3850 &need_resend, &need_resend_linger);
42c1b124 3851 if (err)
f24e9980 3852 goto bad;
42c1b124 3853 handled_incremental = true;
f24e9980
SW		 3854 } else {
3855 dout("ignoring incremental map %u len %d\n",
3856 epoch, maplen);
3857 }
42c1b124 3858 p += maplen;
f24e9980
SW		 3859 nr_maps--;
3860 }
42c1b124 3861 if (handled_incremental)
f24e9980
SW		 3862 goto done;
3863
3864 /* full maps */
3865 ceph_decode_32_safe(&p, end, nr_maps, bad);
3866 dout(" %d full maps\n", nr_maps);
3867 while (nr_maps) {
3868 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3869 epoch = ceph_decode_32(&p);
3870 maplen = ceph_decode_32(&p);
f24e9980
SW		 3871 ceph_decode_need(&p, end, maplen, bad);
3872 if (nr_maps > 1) {
3873 dout("skipping non-latest full map %u len %d\n",
3874 epoch, maplen);
e5253a7b 3875 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 3876 dout("skipping full map %u len %d, "
3877 "older than our %u\n", epoch, maplen,
3878 osdc->osdmap->epoch);
3879 } else {
3880 dout("taking full map %u len %d\n", epoch, maplen);
5aea3dcd
ID		 3881 err = handle_one_map(osdc, p, p + maplen, false,
3882 &need_resend, &need_resend_linger);
42c1b124 3883 if (err)
f24e9980 3884 goto bad;
f24e9980
SW		 3885 }
3886 p += maplen;
3887 nr_maps--;
3888 }
3889
3890done:
cd634fb6
SW		 3891 /*
3892 * subscribe to subsequent osdmap updates if full to ensure
3893 * we find out when we are no longer full and stop returning
3894 * ENOSPC.
3895 */
b7ec35b3
ID		 3896 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3897 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3898 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3899 have_pool_full(osdc);
58eb7932
JL		 3900 if (was_pauserd || was_pausewr || pauserd || pausewr ||
3901 osdc->osdmap->epoch < osdc->epoch_barrier)
42c1b124 3902 maybe_request_map(osdc);
cd634fb6 3903
5aea3dcd 3904 kick_requests(osdc, &need_resend, &need_resend_linger);
42c1b124 3905
fc36d0a4 3906 ceph_osdc_abort_on_full(osdc);
42c1b124
ID		 3907 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
3908 osdc->osdmap->epoch);
5aea3dcd 3909 up_write(&osdc->lock);
03066f23 3910 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 3911 return;
3912
3913bad:
3914 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 3915 ceph_msg_dump(msg);
5aea3dcd
ID		 3916 up_write(&osdc->lock);
3917}
3918
3919/*
3920 * Resubmit requests pending on the given osd.
3921 */
3922static void kick_osd_requests(struct ceph_osd *osd)
3923{
3924 struct rb_node *n;
3925
a02a946d
ID		 3926 clear_backoffs(osd);
3927
922dab61 3928 for (n = rb_first(&osd->o_requests); n; ) {
5aea3dcd
ID		 3929 struct ceph_osd_request *req =
3930 rb_entry(n, struct ceph_osd_request, r_node);
3931
922dab61
ID		 3932 n = rb_next(n); /* cancel_linger_request() */
3933
5aea3dcd
ID		 3934 if (!req->r_linger) {
3935 if (!req->r_t.paused)
3936 send_request(req);
922dab61
ID		 3937 } else {
3938 cancel_linger_request(req);
5aea3dcd
ID		 3939 }
3940 }
922dab61
ID		 3941 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
3942 struct ceph_osd_linger_request *lreq =
3943 rb_entry(n, struct ceph_osd_linger_request, node);
3944
3945 send_linger(lreq);
3946 }
5aea3dcd
ID		 3947}
3948
3949/*
3950 * If the osd connection drops, we need to resubmit all requests.
3951 */
3952static void osd_fault(struct ceph_connection *con)
3953{
3954 struct ceph_osd *osd = con->private;
3955 struct ceph_osd_client *osdc = osd->o_osdc;
3956
3957 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
3958
3959 down_write(&osdc->lock);
3960 if (!osd_registered(osd)) {
3961 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3962 goto out_unlock;
3963 }
3964
3965 if (!reopen_osd(osd))
3966 kick_osd_requests(osd);
3967 maybe_request_map(osdc);
3968
3969out_unlock:
3970 up_write(&osdc->lock);
f24e9980
SW		 3971}
3972
a02a946d
ID		 3973struct MOSDBackoff {
3974 struct ceph_spg spgid;
3975 u32 map_epoch;
3976 u8 op;
3977 u64 id;
3978 struct ceph_hobject_id *begin;
3979 struct ceph_hobject_id *end;
3980};
3981
3982static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
3983{
3984 void *p = msg->front.iov_base;
3985 void *const end = p + msg->front.iov_len;
3986 u8 struct_v;
3987 u32 struct_len;
3988 int ret;
3989
3990 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
3991 if (ret)
3992 return ret;
3993
3994 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
3995 if (ret)
3996 return ret;
3997
3998 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
3999 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4000 ceph_decode_8_safe(&p, end, m->op, e_inval);
4001 ceph_decode_64_safe(&p, end, m->id, e_inval);
4002
4003 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4004 if (!m->begin)
4005 return -ENOMEM;
4006
4007 ret = decode_hoid(&p, end, m->begin);
4008 if (ret) {
4009 free_hoid(m->begin);
4010 return ret;
4011 }
4012
4013 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4014 if (!m->end) {
4015 free_hoid(m->begin);
4016 return -ENOMEM;
4017 }
4018
4019 ret = decode_hoid(&p, end, m->end);
4020 if (ret) {
4021 free_hoid(m->begin);
4022 free_hoid(m->end);
4023 return ret;
4024 }
4025
4026 return 0;
4027
4028e_inval:
4029 return -EINVAL;
4030}
4031
4032static struct ceph_msg *create_backoff_message(
4033 const struct ceph_osd_backoff *backoff,
4034 u32 map_epoch)
4035{
4036 struct ceph_msg *msg;
4037 void *p, *end;
4038 int msg_size;
4039
4040 msg_size = CEPH_ENCODING_START_BLK_LEN +
4041 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4042 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4043 msg_size += CEPH_ENCODING_START_BLK_LEN +
4044 hoid_encoding_size(backoff->begin);
4045 msg_size += CEPH_ENCODING_START_BLK_LEN +
4046 hoid_encoding_size(backoff->end);
4047
4048 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4049 if (!msg)
4050 return NULL;
4051
4052 p = msg->front.iov_base;
4053 end = p + msg->front_alloc_len;
4054
4055 encode_spgid(&p, &backoff->spgid);
4056 ceph_encode_32(&p, map_epoch);
4057 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4058 ceph_encode_64(&p, backoff->id);
4059 encode_hoid(&p, end, backoff->begin);
4060 encode_hoid(&p, end, backoff->end);
4061 BUG_ON(p != end);
4062
4063 msg->front.iov_len = p - msg->front.iov_base;
4064 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4065 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4066
4067 return msg;
4068}
4069
4070static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4071{
4072 struct ceph_spg_mapping *spg;
4073 struct ceph_osd_backoff *backoff;
4074 struct ceph_msg *msg;
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 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4080 if (!spg) {
4081 spg = alloc_spg_mapping();
4082 if (!spg) {
4083 pr_err("%s failed to allocate spg\n", __func__);
4084 return;
4085 }
4086 spg->spgid = m->spgid; /* struct */
4087 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4088 }
4089
4090 backoff = alloc_backoff();
4091 if (!backoff) {
4092 pr_err("%s failed to allocate backoff\n", __func__);
4093 return;
4094 }
4095 backoff->spgid = m->spgid; /* struct */
4096 backoff->id = m->id;
4097 backoff->begin = m->begin;
4098 m->begin = NULL; /* backoff now owns this */
4099 backoff->end = m->end;
4100 m->end = NULL; /* ditto */
4101
4102 insert_backoff(&spg->backoffs, backoff);
4103 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4104
4105 /*
4106 * Ack with original backoff's epoch so that the OSD can
4107 * discard this if there was a PG split.
4108 */
4109 msg = create_backoff_message(backoff, m->map_epoch);
4110 if (!msg) {
4111 pr_err("%s failed to allocate msg\n", __func__);
4112 return;
4113 }
4114 ceph_con_send(&osd->o_con, msg);
4115}
4116
4117static bool target_contained_by(const struct ceph_osd_request_target *t,
4118 const struct ceph_hobject_id *begin,
4119 const struct ceph_hobject_id *end)
4120{
4121 struct ceph_hobject_id hoid;
4122 int cmp;
4123
4124 hoid_fill_from_target(&hoid, t);
4125 cmp = hoid_compare(&hoid, begin);
4126 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4127}
4128
4129static void handle_backoff_unblock(struct ceph_osd *osd,
4130 const struct MOSDBackoff *m)
4131{
4132 struct ceph_spg_mapping *spg;
4133 struct ceph_osd_backoff *backoff;
4134 struct rb_node *n;
4135
4136 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4137 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4138
4139 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4140 if (!backoff) {
4141 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4142 __func__, osd->o_osd, m->spgid.pgid.pool,
4143 m->spgid.pgid.seed, m->spgid.shard, m->id);
4144 return;
4145 }
4146
4147 if (hoid_compare(backoff->begin, m->begin) &&
4148 hoid_compare(backoff->end, m->end)) {
4149 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4150 __func__, osd->o_osd, m->spgid.pgid.pool,
4151 m->spgid.pgid.seed, m->spgid.shard, m->id);
4152 /* unblock it anyway... */
4153 }
4154
4155 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4156 BUG_ON(!spg);
4157
4158 erase_backoff(&spg->backoffs, backoff);
4159 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4160 free_backoff(backoff);
4161
4162 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4163 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4164 free_spg_mapping(spg);
4165 }
4166
4167 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4168 struct ceph_osd_request *req =
4169 rb_entry(n, struct ceph_osd_request, r_node);
4170
4171 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4172 /*
4173 * Match against @m, not @backoff -- the PG may
4174 * have split on the OSD.
4175 */
4176 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4177 /*
4178 * If no other installed backoff applies,
4179 * resend.
4180 */
4181 send_request(req);
4182 }
4183 }
4184 }
4185}
4186
4187static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4188{
4189 struct ceph_osd_client *osdc = osd->o_osdc;
4190 struct MOSDBackoff m;
4191 int ret;
4192
4193 down_read(&osdc->lock);
4194 if (!osd_registered(osd)) {
4195 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4196 up_read(&osdc->lock);
4197 return;
4198 }
4199 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4200
4201 mutex_lock(&osd->lock);
4202 ret = decode_MOSDBackoff(msg, &m);
4203 if (ret) {
4204 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4205 ceph_msg_dump(msg);
4206 goto out_unlock;
4207 }
4208
4209 switch (m.op) {
4210 case CEPH_OSD_BACKOFF_OP_BLOCK:
4211 handle_backoff_block(osd, &m);
4212 break;
4213 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4214 handle_backoff_unblock(osd, &m);
4215 break;
4216 default:
4217 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4218 }
4219
4220 free_hoid(m.begin);
4221 free_hoid(m.end);
4222
4223out_unlock:
4224 mutex_unlock(&osd->lock);
4225 up_read(&osdc->lock);
4226}
4227
a40c4f10
YS		 4228/*
4229 * Process osd watch notifications
4230 */
3c663bbd
AE		 4231static void handle_watch_notify(struct ceph_osd_client *osdc,
4232 struct ceph_msg *msg)
a40c4f10 4233{
922dab61
ID		 4234 void *p = msg->front.iov_base;
4235 void *const end = p + msg->front.iov_len;
4236 struct ceph_osd_linger_request *lreq;
4237 struct linger_work *lwork;
4238 u8 proto_ver, opcode;
4239 u64 cookie, notify_id;
4240 u64 notifier_id = 0;
19079203 4241 s32 return_code = 0;
922dab61
ID		 4242 void *payload = NULL;
4243 u32 payload_len = 0;
a40c4f10
YS		 4244
4245 ceph_decode_8_safe(&p, end, proto_ver, bad);
4246 ceph_decode_8_safe(&p, end, opcode, bad);
4247 ceph_decode_64_safe(&p, end, cookie, bad);
922dab61 4248 p += 8; /* skip ver */
a40c4f10
YS		 4249 ceph_decode_64_safe(&p, end, notify_id, bad);
4250
922dab61
ID		 4251 if (proto_ver >= 1) {
4252 ceph_decode_32_safe(&p, end, payload_len, bad);
4253 ceph_decode_need(&p, end, payload_len, bad);
4254 payload = p;
4255 p += payload_len;
4256 }
4257
4258 if (le16_to_cpu(msg->hdr.version) >= 2)
19079203 4259 ceph_decode_32_safe(&p, end, return_code, bad);
922dab61
ID		 4260
4261 if (le16_to_cpu(msg->hdr.version) >= 3)
4262 ceph_decode_64_safe(&p, end, notifier_id, bad);
4263
4264 down_read(&osdc->lock);
4265 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4266 if (!lreq) {
4267 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4268 cookie);
4269 goto out_unlock_osdc;
4270 }
4271
4272 mutex_lock(&lreq->lock);
19079203
ID		 4273 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4274 opcode, cookie, lreq, lreq->is_watch);
922dab61
ID		 4275 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4276 if (!lreq->last_error) {
4277 lreq->last_error = -ENOTCONN;
4278 queue_watch_error(lreq);
4279 }
19079203
ID		 4280 } else if (!lreq->is_watch) {
4281 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4282 if (lreq->notify_id && lreq->notify_id != notify_id) {
4283 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4284 lreq->notify_id, notify_id);
4285 } else if (!completion_done(&lreq->notify_finish_wait)) {
4286 struct ceph_msg_data *data =
4287 list_first_entry_or_null(&msg->data,
4288 struct ceph_msg_data,
4289 links);
4290
4291 if (data) {
4292 if (lreq->preply_pages) {
4293 WARN_ON(data->type !=
4294 CEPH_MSG_DATA_PAGES);
4295 *lreq->preply_pages = data->pages;
4296 *lreq->preply_len = data->length;
4297 } else {
4298 ceph_release_page_vector(data->pages,
4299 calc_pages_for(0, data->length));
4300 }
4301 }
4302 lreq->notify_finish_error = return_code;
4303 complete_all(&lreq->notify_finish_wait);
4304 }
922dab61
ID		 4305 } else {
4306 /* CEPH_WATCH_EVENT_NOTIFY */
4307 lwork = lwork_alloc(lreq, do_watch_notify);
4308 if (!lwork) {
4309 pr_err("failed to allocate notify-lwork\n");
4310 goto out_unlock_lreq;
a40c4f10 4311 }
a40c4f10 4312
922dab61
ID		 4313 lwork->notify.notify_id = notify_id;
4314 lwork->notify.notifier_id = notifier_id;
4315 lwork->notify.payload = payload;
4316 lwork->notify.payload_len = payload_len;
4317 lwork->notify.msg = ceph_msg_get(msg);
4318 lwork_queue(lwork);
91883cd2 4319 }
a40c4f10 4320
922dab61
ID		 4321out_unlock_lreq:
4322 mutex_unlock(&lreq->lock);
4323out_unlock_osdc:
4324 up_read(&osdc->lock);
a40c4f10
YS		 4325 return;
4326
4327bad:
4328 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 4329}
4330
70636773
AE		 4331/*
4332 * Register request, send initial attempt.
4333 */
4334int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4335 struct ceph_osd_request *req,
4336 bool nofail)
4337{
5aea3dcd
ID		 4338 down_read(&osdc->lock);
4339 submit_request(req, false);
4340 up_read(&osdc->lock);
0bbfdfe8 4341
5aea3dcd 4342 return 0;
f24e9980 4343}
3d14c5d2 4344EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 4345
c9f9b93d 4346/*
c297eb42
ID		 4347 * Unregister a registered request. The request is not completed:
4348 * ->r_result isn't set and __complete_request() isn't called.
c9f9b93d
ID		 4349 */
4350void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4351{
4352 struct ceph_osd_client *osdc = req->r_osdc;
4353
5aea3dcd 4354 down_write(&osdc->lock);
5aea3dcd
ID		 4355 if (req->r_osd)
4356 cancel_request(req);
4357 up_write(&osdc->lock);
c9f9b93d
ID		 4358}
4359EXPORT_SYMBOL(ceph_osdc_cancel_request);
4360
f24e9980 4361/*
42b06965 4362 * @timeout: in jiffies, 0 means "wait forever"
f24e9980 4363 */
42b06965
ID		 4364static int wait_request_timeout(struct ceph_osd_request *req,
4365 unsigned long timeout)
f24e9980 4366{
42b06965 4367 long left;
c9f9b93d 4368
42b06965 4369 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
0e76abf2 4370 left = wait_for_completion_killable_timeout(&req->r_completion,
42b06965
ID		 4371 ceph_timeout_jiffies(timeout));
4372 if (left <= 0) {
4373 left = left ?: -ETIMEDOUT;
c9f9b93d 4374 ceph_osdc_cancel_request(req);
42b06965
ID		 4375 } else {
4376 left = req->r_result; /* completed */
f24e9980
SW		 4377 }
4378
42b06965
ID		 4379 return left;
4380}
4381
4382/*
4383 * wait for a request to complete
4384 */
4385int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4386 struct ceph_osd_request *req)
4387{
4388 return wait_request_timeout(req, 0);
f24e9980 4389}
3d14c5d2 4390EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 4391
4392/*
4393 * sync - wait for all in-flight requests to flush. avoid starvation.
4394 */
4395void ceph_osdc_sync(struct ceph_osd_client *osdc)
4396{
5aea3dcd
ID		 4397 struct rb_node *n, *p;
4398 u64 last_tid = atomic64_read(&osdc->last_tid);
f24e9980 4399
5aea3dcd
ID		 4400again:
4401 down_read(&osdc->lock);
4402 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4403 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4404
4405 mutex_lock(&osd->lock);
4406 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4407 struct ceph_osd_request *req =
4408 rb_entry(p, struct ceph_osd_request, r_node);
4409
4410 if (req->r_tid > last_tid)
4411 break;
4412
4413 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4414 continue;
f24e9980 4415
5aea3dcd
ID		 4416 ceph_osdc_get_request(req);
4417 mutex_unlock(&osd->lock);
4418 up_read(&osdc->lock);
4419 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4420 __func__, req, req->r_tid, last_tid);
b18b9550 4421 wait_for_completion(&req->r_completion);
5aea3dcd
ID		 4422 ceph_osdc_put_request(req);
4423 goto again;
4424 }
f24e9980 4425
5aea3dcd 4426 mutex_unlock(&osd->lock);
f24e9980 4427 }
5aea3dcd
ID		 4428
4429 up_read(&osdc->lock);
4430 dout("%s done last_tid %llu\n", __func__, last_tid);
f24e9980 4431}
3d14c5d2 4432EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 4433
922dab61
ID		 4434static struct ceph_osd_request *
4435alloc_linger_request(struct ceph_osd_linger_request *lreq)
4436{
4437 struct ceph_osd_request *req;
4438
4439 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4440 if (!req)
4441 return NULL;
4442
4443 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4444 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4445
4446 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4447 ceph_osdc_put_request(req);
4448 return NULL;
4449 }
4450
4451 return req;
4452}
4453
4454/*
4455 * Returns a handle, caller owns a ref.
4456 */
4457struct ceph_osd_linger_request *
4458ceph_osdc_watch(struct ceph_osd_client *osdc,
4459 struct ceph_object_id *oid,
4460 struct ceph_object_locator *oloc,
4461 rados_watchcb2_t wcb,
4462 rados_watcherrcb_t errcb,
4463 void *data)
4464{
4465 struct ceph_osd_linger_request *lreq;
4466 int ret;
4467
4468 lreq = linger_alloc(osdc);
4469 if (!lreq)
4470 return ERR_PTR(-ENOMEM);
4471
19079203 4472 lreq->is_watch = true;
922dab61
ID		 4473 lreq->wcb = wcb;
4474 lreq->errcb = errcb;
4475 lreq->data = data;
b07d3c4b 4476 lreq->watch_valid_thru = jiffies;
922dab61
ID		 4477
4478 ceph_oid_copy(&lreq->t.base_oid, oid);
4479 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
54ea0046 4480 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
1134e091 4481 ktime_get_real_ts(&lreq->mtime);
922dab61
ID		 4482
4483 lreq->reg_req = alloc_linger_request(lreq);
4484 if (!lreq->reg_req) {
4485 ret = -ENOMEM;
4486 goto err_put_lreq;
4487 }
4488
4489 lreq->ping_req = alloc_linger_request(lreq);
4490 if (!lreq->ping_req) {
4491 ret = -ENOMEM;
4492 goto err_put_lreq;
4493 }
4494
4495 down_write(&osdc->lock);
4496 linger_register(lreq); /* before osd_req_op_* */
4497 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
4498 CEPH_OSD_WATCH_OP_WATCH);
4499 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
4500 CEPH_OSD_WATCH_OP_PING);
4501 linger_submit(lreq);
4502 up_write(&osdc->lock);
4503
4504 ret = linger_reg_commit_wait(lreq);
4505 if (ret) {
4506 linger_cancel(lreq);
4507 goto err_put_lreq;
4508 }
4509
4510 return lreq;
4511
4512err_put_lreq:
4513 linger_put(lreq);
4514 return ERR_PTR(ret);
4515}
4516EXPORT_SYMBOL(ceph_osdc_watch);
4517
4518/*
4519 * Releases a ref.
4520 *
4521 * Times out after mount_timeout to preserve rbd unmap behaviour
4522 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4523 * with mount_timeout").
4524 */
4525int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4526 struct ceph_osd_linger_request *lreq)
4527{
4528 struct ceph_options *opts = osdc->client->options;
4529 struct ceph_osd_request *req;
4530 int ret;
4531
4532 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4533 if (!req)
4534 return -ENOMEM;
4535
4536 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4537 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
54ea0046 4538 req->r_flags = CEPH_OSD_FLAG_WRITE;
1134e091 4539 ktime_get_real_ts(&req->r_mtime);
922dab61
ID		 4540 osd_req_op_watch_init(req, 0, lreq->linger_id,
4541 CEPH_OSD_WATCH_OP_UNWATCH);
4542
4543 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4544 if (ret)
4545 goto out_put_req;
4546
4547 ceph_osdc_start_request(osdc, req, false);
4548 linger_cancel(lreq);
4549 linger_put(lreq);
4550 ret = wait_request_timeout(req, opts->mount_timeout);
4551
4552out_put_req:
4553 ceph_osdc_put_request(req);
4554 return ret;
4555}
4556EXPORT_SYMBOL(ceph_osdc_unwatch);
4557
4558static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4559 u64 notify_id, u64 cookie, void *payload,
4560 size_t payload_len)
4561{
4562 struct ceph_osd_req_op *op;
4563 struct ceph_pagelist *pl;
4564 int ret;
4565
4566 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4567
4568 pl = kmalloc(sizeof(*pl), GFP_NOIO);
4569 if (!pl)
4570 return -ENOMEM;
4571
4572 ceph_pagelist_init(pl);
4573 ret = ceph_pagelist_encode_64(pl, notify_id);
4574 ret |= ceph_pagelist_encode_64(pl, cookie);
4575 if (payload) {
4576 ret |= ceph_pagelist_encode_32(pl, payload_len);
4577 ret |= ceph_pagelist_append(pl, payload, payload_len);
4578 } else {
4579 ret |= ceph_pagelist_encode_32(pl, 0);
4580 }
4581 if (ret) {
4582 ceph_pagelist_release(pl);
4583 return -ENOMEM;
4584 }
4585
4586 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4587 op->indata_len = pl->length;
4588 return 0;
4589}
4590
4591int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4592 struct ceph_object_id *oid,
4593 struct ceph_object_locator *oloc,
4594 u64 notify_id,
4595 u64 cookie,
4596 void *payload,
4597 size_t payload_len)
4598{
4599 struct ceph_osd_request *req;
4600 int ret;
4601
4602 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4603 if (!req)
4604 return -ENOMEM;
4605
4606 ceph_oid_copy(&req->r_base_oid, oid);
4607 ceph_oloc_copy(&req->r_base_oloc, oloc);
4608 req->r_flags = CEPH_OSD_FLAG_READ;
4609
4610 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4611 if (ret)
4612 goto out_put_req;
4613
4614 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4615 payload_len);
4616 if (ret)
4617 goto out_put_req;
4618
4619 ceph_osdc_start_request(osdc, req, false);
4620 ret = ceph_osdc_wait_request(osdc, req);
4621
4622out_put_req:
4623 ceph_osdc_put_request(req);
4624 return ret;
4625}
4626EXPORT_SYMBOL(ceph_osdc_notify_ack);
4627
19079203
ID		 4628static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4629 u64 cookie, u32 prot_ver, u32 timeout,
4630 void *payload, size_t payload_len)
4631{
4632 struct ceph_osd_req_op *op;
4633 struct ceph_pagelist *pl;
4634 int ret;
4635
4636 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4637 op->notify.cookie = cookie;
4638
4639 pl = kmalloc(sizeof(*pl), GFP_NOIO);
4640 if (!pl)
4641 return -ENOMEM;
4642
4643 ceph_pagelist_init(pl);
4644 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4645 ret |= ceph_pagelist_encode_32(pl, timeout);
4646 ret |= ceph_pagelist_encode_32(pl, payload_len);
4647 ret |= ceph_pagelist_append(pl, payload, payload_len);
4648 if (ret) {
4649 ceph_pagelist_release(pl);
4650 return -ENOMEM;
4651 }
4652
4653 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4654 op->indata_len = pl->length;
4655 return 0;
4656}
4657
4658/*
4659 * @timeout: in seconds
4660 *
4661 * @preply_{pages,len} are initialized both on success and error.
4662 * The caller is responsible for:
4663 *
4664 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4665 */
4666int ceph_osdc_notify(struct ceph_osd_client *osdc,
4667 struct ceph_object_id *oid,
4668 struct ceph_object_locator *oloc,
4669 void *payload,
4670 size_t payload_len,
4671 u32 timeout,
4672 struct page ***preply_pages,
4673 size_t *preply_len)
4674{
4675 struct ceph_osd_linger_request *lreq;
4676 struct page **pages;
4677 int ret;
4678
4679 WARN_ON(!timeout);
4680 if (preply_pages) {
4681 *preply_pages = NULL;
4682 *preply_len = 0;
4683 }
4684
4685 lreq = linger_alloc(osdc);
4686 if (!lreq)
4687 return -ENOMEM;
4688
4689 lreq->preply_pages = preply_pages;
4690 lreq->preply_len = preply_len;
4691
4692 ceph_oid_copy(&lreq->t.base_oid, oid);
4693 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4694 lreq->t.flags = CEPH_OSD_FLAG_READ;
4695
4696 lreq->reg_req = alloc_linger_request(lreq);
4697 if (!lreq->reg_req) {
4698 ret = -ENOMEM;
4699 goto out_put_lreq;
4700 }
4701
4702 /* for notify_id */
4703 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4704 if (IS_ERR(pages)) {
4705 ret = PTR_ERR(pages);
4706 goto out_put_lreq;
4707 }
4708
4709 down_write(&osdc->lock);
4710 linger_register(lreq); /* before osd_req_op_* */
4711 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
4712 timeout, payload, payload_len);
4713 if (ret) {
4714 linger_unregister(lreq);
4715 up_write(&osdc->lock);
4716 ceph_release_page_vector(pages, 1);
4717 goto out_put_lreq;
4718 }
4719 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4720 response_data),
4721 pages, PAGE_SIZE, 0, false, true);
4722 linger_submit(lreq);
4723 up_write(&osdc->lock);
4724
4725 ret = linger_reg_commit_wait(lreq);
4726 if (!ret)
4727 ret = linger_notify_finish_wait(lreq);
4728 else
4729 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4730
4731 linger_cancel(lreq);
4732out_put_lreq:
4733 linger_put(lreq);
4734 return ret;
4735}
4736EXPORT_SYMBOL(ceph_osdc_notify);
4737
b07d3c4b
ID		 4738/*
4739 * Return the number of milliseconds since the watch was last
4740 * confirmed, or an error. If there is an error, the watch is no
4741 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4742 */
4743int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4744 struct ceph_osd_linger_request *lreq)
4745{
4746 unsigned long stamp, age;
4747 int ret;
4748
4749 down_read(&osdc->lock);
4750 mutex_lock(&lreq->lock);
4751 stamp = lreq->watch_valid_thru;
4752 if (!list_empty(&lreq->pending_lworks)) {
4753 struct linger_work *lwork =
4754 list_first_entry(&lreq->pending_lworks,
4755 struct linger_work,
4756 pending_item);
4757
4758 if (time_before(lwork->queued_stamp, stamp))
4759 stamp = lwork->queued_stamp;
4760 }
4761 age = jiffies - stamp;
4762 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4763 lreq, lreq->linger_id, age, lreq->last_error);
4764 /* we are truncating to msecs, so return a safe upper bound */
4765 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4766
4767 mutex_unlock(&lreq->lock);
4768 up_read(&osdc->lock);
4769 return ret;
4770}
4771
a4ed38d7
DF		 4772static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4773{
4774 u8 struct_v;
4775 u32 struct_len;
4776 int ret;
4777
4778 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4779 &struct_v, &struct_len);
4780 if (ret)
4781 return ret;
4782
4783 ceph_decode_copy(p, &item->name, sizeof(item->name));
4784 item->cookie = ceph_decode_64(p);
4785 *p += 4; /* skip timeout_seconds */
4786 if (struct_v >= 2) {
4787 ceph_decode_copy(p, &item->addr, sizeof(item->addr));
4788 ceph_decode_addr(&item->addr);
4789 }
4790
4791 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4792 ENTITY_NAME(item->name), item->cookie,
4793 ceph_pr_addr(&item->addr.in_addr));
4794 return 0;
4795}
4796
4797static int decode_watchers(void **p, void *end,
4798 struct ceph_watch_item **watchers,
4799 u32 *num_watchers)
4800{
4801 u8 struct_v;
4802 u32 struct_len;
4803 int i;
4804 int ret;
4805
4806 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4807 &struct_v, &struct_len);
4808 if (ret)
4809 return ret;
4810
4811 *num_watchers = ceph_decode_32(p);
4812 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4813 if (!*watchers)
4814 return -ENOMEM;
4815
4816 for (i = 0; i < *num_watchers; i++) {
4817 ret = decode_watcher(p, end, *watchers + i);
4818 if (ret) {
4819 kfree(*watchers);
4820 return ret;
4821 }
4822 }
4823
4824 return 0;
4825}
4826
4827/*
4828 * On success, the caller is responsible for:
4829 *
4830 * kfree(watchers);
4831 */
4832int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
4833 struct ceph_object_id *oid,
4834 struct ceph_object_locator *oloc,
4835 struct ceph_watch_item **watchers,
4836 u32 *num_watchers)
4837{
4838 struct ceph_osd_request *req;
4839 struct page **pages;
4840 int ret;
4841
4842 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4843 if (!req)
4844 return -ENOMEM;
4845
4846 ceph_oid_copy(&req->r_base_oid, oid);
4847 ceph_oloc_copy(&req->r_base_oloc, oloc);
4848 req->r_flags = CEPH_OSD_FLAG_READ;
4849
4850 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4851 if (ret)
4852 goto out_put_req;
4853
4854 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4855 if (IS_ERR(pages)) {
4856 ret = PTR_ERR(pages);
4857 goto out_put_req;
4858 }
4859
4860 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
4861 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
4862 response_data),
4863 pages, PAGE_SIZE, 0, false, true);
4864
4865 ceph_osdc_start_request(osdc, req, false);
4866 ret = ceph_osdc_wait_request(osdc, req);
4867 if (ret >= 0) {
4868 void *p = page_address(pages[0]);
4869 void *const end = p + req->r_ops[0].outdata_len;
4870
4871 ret = decode_watchers(&p, end, watchers, num_watchers);
4872 }
4873
4874out_put_req:
4875 ceph_osdc_put_request(req);
4876 return ret;
4877}
4878EXPORT_SYMBOL(ceph_osdc_list_watchers);
4879
dd935f44
JD		 4880/*
4881 * Call all pending notify callbacks - for use after a watch is
4882 * unregistered, to make sure no more callbacks for it will be invoked
4883 */
f6479449 4884void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44 4885{
99d16943 4886 dout("%s osdc %p\n", __func__, osdc);
dd935f44
JD		 4887 flush_workqueue(osdc->notify_wq);
4888}
4889EXPORT_SYMBOL(ceph_osdc_flush_notifies);
4890
7cca78c9
ID		 4891void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
4892{
4893 down_read(&osdc->lock);
4894 maybe_request_map(osdc);
4895 up_read(&osdc->lock);
4896}
4897EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
dd935f44 4898
428a7158
DF		 4899/*
4900 * Execute an OSD class method on an object.
4901 *
4902 * @flags: CEPH_OSD_FLAG_*
2544a020 4903 * @resp_len: in/out param for reply length
428a7158
DF		 4904 */
4905int ceph_osdc_call(struct ceph_osd_client *osdc,
4906 struct ceph_object_id *oid,
4907 struct ceph_object_locator *oloc,
4908 const char *class, const char *method,
4909 unsigned int flags,
4910 struct page *req_page, size_t req_len,
4911 struct page *resp_page, size_t *resp_len)
4912{
4913 struct ceph_osd_request *req;
4914 int ret;
4915
2544a020
ID		 4916 if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE))
4917 return -E2BIG;
4918
428a7158
DF		 4919 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4920 if (!req)
4921 return -ENOMEM;
4922
4923 ceph_oid_copy(&req->r_base_oid, oid);
4924 ceph_oloc_copy(&req->r_base_oloc, oloc);
4925 req->r_flags = flags;
4926
4927 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4928 if (ret)
4929 goto out_put_req;
4930
4931 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
4932 if (req_page)
4933 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
4934 0, false, false);
4935 if (resp_page)
4936 osd_req_op_cls_response_data_pages(req, 0, &resp_page,
2544a020 4937 *resp_len, 0, false, false);
428a7158
DF		 4938
4939 ceph_osdc_start_request(osdc, req, false);
4940 ret = ceph_osdc_wait_request(osdc, req);
4941 if (ret >= 0) {
4942 ret = req->r_ops[0].rval;
4943 if (resp_page)
4944 *resp_len = req->r_ops[0].outdata_len;
4945 }
4946
4947out_put_req:
4948 ceph_osdc_put_request(req);
4949 return ret;
4950}
4951EXPORT_SYMBOL(ceph_osdc_call);
4952
f24e9980
SW		 4953/*
4954 * init, shutdown
4955 */
4956int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
4957{
4958 int err;
4959
4960 dout("init\n");
4961 osdc->client = client;
5aea3dcd 4962 init_rwsem(&osdc->lock);
f24e9980 4963 osdc->osds = RB_ROOT;
f5a2041b 4964 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 4965 spin_lock_init(&osdc->osd_lru_lock);
5aea3dcd
ID		 4966 osd_init(&osdc->homeless_osd);
4967 osdc->homeless_osd.o_osdc = osdc;
4968 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
264048af 4969 osdc->last_linger_id = CEPH_LINGER_ID_START;
922dab61 4970 osdc->linger_requests = RB_ROOT;
4609245e
ID		 4971 osdc->map_checks = RB_ROOT;
4972 osdc->linger_map_checks = RB_ROOT;
f24e9980 4973 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b
YS		 4974 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
4975
5f44f142 4976 err = -ENOMEM;
e5253a7b
ID		 4977 osdc->osdmap = ceph_osdmap_alloc();
4978 if (!osdc->osdmap)
4979 goto out;
4980
9e767adb
ID		 4981 osdc->req_mempool = mempool_create_slab_pool(10,
4982 ceph_osd_request_cache);
f24e9980 4983 if (!osdc->req_mempool)
e5253a7b 4984 goto out_map;
f24e9980 4985
d50b409f 4986 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
711da55d 4987 PAGE_SIZE, 10, true, "osd_op");
f24e9980 4988 if (err < 0)
5f44f142 4989 goto out_mempool;
d50b409f 4990 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
711da55d 4991 PAGE_SIZE, 10, true, "osd_op_reply");
c16e7869
SW		 4992 if (err < 0)
4993 goto out_msgpool;
a40c4f10 4994
dbcae088 4995 err = -ENOMEM;
a40c4f10 4996 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 4997 if (!osdc->notify_wq)
c172ec5c
ID		 4998 goto out_msgpool_reply;
4999
fbca9635
ID		 5000 schedule_delayed_work(&osdc->timeout_work,
5001 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 5002 schedule_delayed_work(&osdc->osds_timeout_work,
5003 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5004
f24e9980 5005 return 0;
5f44f142 5006
c172ec5c
ID		 5007out_msgpool_reply:
5008 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 5009out_msgpool:
5010 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 5011out_mempool:
5012 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 5013out_map:
5014 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 5015out:
5016 return err;
f24e9980
SW		 5017}
5018
5019void ceph_osdc_stop(struct ceph_osd_client *osdc)
5020{
a40c4f10
YS		 5021 flush_workqueue(osdc->notify_wq);
5022 destroy_workqueue(osdc->notify_wq);
f24e9980 5023 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 5024 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f 5025
5aea3dcd 5026 down_write(&osdc->lock);
42a2c09f
ID		 5027 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5028 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5029 struct ceph_osd, o_node);
5aea3dcd 5030 close_osd(osd);
42a2c09f 5031 }
5aea3dcd 5032 up_write(&osdc->lock);
02113a0f 5033 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5aea3dcd
ID		 5034 osd_cleanup(&osdc->homeless_osd);
5035
5036 WARN_ON(!list_empty(&osdc->osd_lru));
922dab61 5037 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4609245e
ID		 5038 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5039 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5aea3dcd
ID		 5040 WARN_ON(atomic_read(&osdc->num_requests));
5041 WARN_ON(atomic_read(&osdc->num_homeless));
42a2c09f 5042
e5253a7b 5043 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 5044 mempool_destroy(osdc->req_mempool);
5045 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 5046 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 5047}
5048
5049/*
5050 * Read some contiguous pages. If we cross a stripe boundary, shorten
5051 * *plen. Return number of bytes read, or error.
5052 */
5053int ceph_osdc_readpages(struct ceph_osd_client *osdc,
5054 struct ceph_vino vino, struct ceph_file_layout *layout,
5055 u64 off, u64 *plen,
5056 u32 truncate_seq, u64 truncate_size,
b7495fc2 5057 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 5058{
5059 struct ceph_osd_request *req;
5060 int rc = 0;
5061
5062 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
5063 vino.snap, off, *plen);
715e4cd4 5064 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 5065 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 5066 NULL, truncate_seq, truncate_size,
153e5167 5067 false);
6816282d
SW		 5068 if (IS_ERR(req))
5069 return PTR_ERR(req);
f24e9980
SW		 5070
5071 /* it may be a short read due to an object boundary */
406e2c9f 5072 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 5073 pages, *plen, page_align, false, false);
f24e9980 5074
e0c59487 5075 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 5076 off, *plen, *plen, page_align);
f24e9980
SW		 5077
5078 rc = ceph_osdc_start_request(osdc, req, false);
5079 if (!rc)
5080 rc = ceph_osdc_wait_request(osdc, req);
5081
5082 ceph_osdc_put_request(req);
5083 dout("readpages result %d\n", rc);
5084 return rc;
5085}
3d14c5d2 5086EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 5087
5088/*
5089 * do a synchronous write on N pages
5090 */
5091int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
5092 struct ceph_file_layout *layout,
5093 struct ceph_snap_context *snapc,
5094 u64 off, u64 len,
5095 u32 truncate_seq, u64 truncate_size,
5096 struct timespec *mtime,
24808826 5097 struct page **pages, int num_pages)
f24e9980
SW		 5098{
5099 struct ceph_osd_request *req;
5100 int rc = 0;
b7495fc2 5101 int page_align = off & ~PAGE_MASK;
f24e9980 5102
715e4cd4 5103 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
54ea0046 5104 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
acead002 5105 snapc, truncate_seq, truncate_size,
153e5167 5106 true);
6816282d
SW		 5107 if (IS_ERR(req))
5108 return PTR_ERR(req);
f24e9980
SW		 5109
5110 /* it may be a short write due to an object boundary */
406e2c9f 5111 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 5112 false, false);
5113 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 5114
bb873b53 5115 req->r_mtime = *mtime;
87f979d3 5116 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 5117 if (!rc)
5118 rc = ceph_osdc_wait_request(osdc, req);
5119
5120 ceph_osdc_put_request(req);
5121 if (rc == 0)
5122 rc = len;
5123 dout("writepages result %d\n", rc);
5124 return rc;
5125}
3d14c5d2 5126EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 5127
57a35dfb 5128int __init ceph_osdc_setup(void)
5522ae0b 5129{
3f1af42a
ID		 5130 size_t size = sizeof(struct ceph_osd_request) +
5131 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5132
5522ae0b 5133 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 5134 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5135 0, 0, NULL);
5522ae0b
AE		 5136
5137 return ceph_osd_request_cache ? 0 : -ENOMEM;
5138}
5522ae0b
AE		 5139
5140void ceph_osdc_cleanup(void)
5141{
5142 BUG_ON(!ceph_osd_request_cache);
5143 kmem_cache_destroy(ceph_osd_request_cache);
5144 ceph_osd_request_cache = NULL;
5145}
5522ae0b 5146
f24e9980
SW		 5147/*
5148 * handle incoming message
5149 */
5150static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5151{
5152 struct ceph_osd *osd = con->private;
5aea3dcd 5153 struct ceph_osd_client *osdc = osd->o_osdc;
f24e9980
SW		 5154 int type = le16_to_cpu(msg->hdr.type);
5155
f24e9980
SW		 5156 switch (type) {
5157 case CEPH_MSG_OSD_MAP:
5158 ceph_osdc_handle_map(osdc, msg);
5159 break;
5160 case CEPH_MSG_OSD_OPREPLY:
5aea3dcd 5161 handle_reply(osd, msg);
f24e9980 5162 break;
a02a946d
ID		 5163 case CEPH_MSG_OSD_BACKOFF:
5164 handle_backoff(osd, msg);
5165 break;
a40c4f10
YS		 5166 case CEPH_MSG_WATCH_NOTIFY:
5167 handle_watch_notify(osdc, msg);
5168 break;
f24e9980
SW		 5169
5170 default:
5171 pr_err("received unknown message type %d %s\n", type,
5172 ceph_msg_type_name(type));
5173 }
5aea3dcd 5174
f24e9980
SW		 5175 ceph_msg_put(msg);
5176}
5177
5b3a4db3 5178/*
d15f9d69
ID		 5179 * Lookup and return message for incoming reply. Don't try to do
5180 * anything about a larger than preallocated data portion of the
5181 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 5182 */
5183static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 5184 struct ceph_msg_header *hdr,
5185 int *skip)
f24e9980
SW		 5186{
5187 struct ceph_osd *osd = con->private;
5188 struct ceph_osd_client *osdc = osd->o_osdc;
5aea3dcd 5189 struct ceph_msg *m = NULL;
0547a9b3 5190 struct ceph_osd_request *req;
3f0a4ac5 5191 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 5192 int data_len = le32_to_cpu(hdr->data_len);
5aea3dcd 5193 u64 tid = le64_to_cpu(hdr->tid);
f24e9980 5194
5aea3dcd
ID		 5195 down_read(&osdc->lock);
5196 if (!osd_registered(osd)) {
5197 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5198 *skip = 1;
5199 goto out_unlock_osdc;
5200 }
5201 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5202
5203 mutex_lock(&osd->lock);
5204 req = lookup_request(&osd->o_requests, tid);
0547a9b3 5205 if (!req) {
cd8140c6
ID		 5206 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5207 osd->o_osd, tid);
d15f9d69 5208 *skip = 1;
5aea3dcd 5209 goto out_unlock_session;
0547a9b3 5210 }
c16e7869 5211
ace6d3a9 5212 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 5213
f2be82b0 5214 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 5215 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5216 __func__, osd->o_osd, req->r_tid, front_len,
5217 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 5218 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5219 false);
a79832f2 5220 if (!m)
5aea3dcd 5221 goto out_unlock_session;
c16e7869
SW		 5222 ceph_msg_put(req->r_reply);
5223 req->r_reply = m;
5224 }
0fff87ec 5225
d15f9d69
ID		 5226 if (data_len > req->r_reply->data_length) {
5227 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5228 __func__, osd->o_osd, req->r_tid, data_len,
5229 req->r_reply->data_length);
5230 m = NULL;
5231 *skip = 1;
5aea3dcd 5232 goto out_unlock_session;
0547a9b3 5233 }
d15f9d69
ID		 5234
5235 m = ceph_msg_get(req->r_reply);
c16e7869 5236 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3 5237
5aea3dcd
ID		 5238out_unlock_session:
5239 mutex_unlock(&osd->lock);
5240out_unlock_osdc:
5241 up_read(&osdc->lock);
2450418c 5242 return m;
5b3a4db3
SW		 5243}
5244
19079203
ID		 5245/*
5246 * TODO: switch to a msg-owned pagelist
5247 */
5248static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5249{
5250 struct ceph_msg *m;
5251 int type = le16_to_cpu(hdr->type);
5252 u32 front_len = le32_to_cpu(hdr->front_len);
5253 u32 data_len = le32_to_cpu(hdr->data_len);
5254
5255 m = ceph_msg_new(type, front_len, GFP_NOIO, false);
5256 if (!m)
5257 return NULL;
5258
5259 if (data_len) {
5260 struct page **pages;
5261 struct ceph_osd_data osd_data;
5262
5263 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5264 GFP_NOIO);
c22e853a 5265 if (IS_ERR(pages)) {
19079203
ID		 5266 ceph_msg_put(m);
5267 return NULL;
5268 }
5269
5270 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
5271 false);
5272 ceph_osdc_msg_data_add(m, &osd_data);
5273 }
5274
5275 return m;
5276}
5277
5b3a4db3
SW		 5278static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5279 struct ceph_msg_header *hdr,
5280 int *skip)
5281{
5282 struct ceph_osd *osd = con->private;
5283 int type = le16_to_cpu(hdr->type);
5b3a4db3 5284
1c20f2d2 5285 *skip = 0;
5b3a4db3
SW		 5286 switch (type) {
5287 case CEPH_MSG_OSD_MAP:
a02a946d 5288 case CEPH_MSG_OSD_BACKOFF:
a40c4f10 5289 case CEPH_MSG_WATCH_NOTIFY:
19079203 5290 return alloc_msg_with_page_vector(hdr);
5b3a4db3
SW		 5291 case CEPH_MSG_OSD_OPREPLY:
5292 return get_reply(con, hdr, skip);
5293 default:
5aea3dcd
ID		 5294 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5295 osd->o_osd, type);
5b3a4db3
SW		 5296 *skip = 1;
5297 return NULL;
5298 }
f24e9980
SW		 5299}
5300
5301/*
5302 * Wrappers to refcount containing ceph_osd struct
5303 */
5304static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5305{
5306 struct ceph_osd *osd = con->private;
5307 if (get_osd(osd))
5308 return con;
5309 return NULL;
5310}
5311
5312static void put_osd_con(struct ceph_connection *con)
5313{
5314 struct ceph_osd *osd = con->private;
5315 put_osd(osd);
5316}
5317
4e7a5dcd
SW		 5318/*
5319 * authentication
5320 */
a3530df3
AE		 5321/*
5322 * Note: returned pointer is the address of a structure that's
5323 * managed separately. Caller must *not* attempt to free it.
5324 */
5325static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 5326 int *proto, int force_new)
4e7a5dcd
SW		 5327{
5328 struct ceph_osd *o = con->private;
5329 struct ceph_osd_client *osdc = o->o_osdc;
5330 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 5331 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 5332
74f1869f 5333 if (force_new && auth->authorizer) {
6c1ea260 5334 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 5335 auth->authorizer = NULL;
5336 }
27859f97
SW		 5337 if (!auth->authorizer) {
5338 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5339 auth);
4e7a5dcd 5340 if (ret)
a3530df3 5341 return ERR_PTR(ret);
27859f97
SW		 5342 } else {
5343 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 5344 auth);
5345 if (ret)
5346 return ERR_PTR(ret);
4e7a5dcd 5347 }
4e7a5dcd 5348 *proto = ac->protocol;
74f1869f 5349
a3530df3 5350 return auth;
4e7a5dcd
SW		 5351}
5352
5353
0dde5848 5354static int verify_authorizer_reply(struct ceph_connection *con)
4e7a5dcd
SW		 5355{
5356 struct ceph_osd *o = con->private;
5357 struct ceph_osd_client *osdc = o->o_osdc;
5358 struct ceph_auth_client *ac = osdc->client->monc.auth;
5359
0dde5848 5360 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
4e7a5dcd
SW		 5361}
5362
9bd2e6f8
SW		 5363static int invalidate_authorizer(struct ceph_connection *con)
5364{
5365 struct ceph_osd *o = con->private;
5366 struct ceph_osd_client *osdc = o->o_osdc;
5367 struct ceph_auth_client *ac = osdc->client->monc.auth;
5368
27859f97 5369 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 5370 return ceph_monc_validate_auth(&osdc->client->monc);
5371}
4e7a5dcd 5372
8cb441c0
ID		 5373static void osd_reencode_message(struct ceph_msg *msg)
5374{
914902af
ID		 5375 int type = le16_to_cpu(msg->hdr.type);
5376
5377 if (type == CEPH_MSG_OSD_OP)
5378 encode_request_finish(msg);
8cb441c0
ID		 5379}
5380
79dbd1ba 5381static int osd_sign_message(struct ceph_msg *msg)
33d07337 5382{
79dbd1ba 5383 struct ceph_osd *o = msg->con->private;
33d07337 5384 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5385
33d07337
YZ		 5386 return ceph_auth_sign_message(auth, msg);
5387}
5388
79dbd1ba 5389static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 5390{
79dbd1ba 5391 struct ceph_osd *o = msg->con->private;
33d07337 5392 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5393
33d07337
YZ		 5394 return ceph_auth_check_message_signature(auth, msg);
5395}
5396
9e32789f 5397static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 5398 .get = get_osd_con,
5399 .put = put_osd_con,
5400 .dispatch = dispatch,
4e7a5dcd
SW		 5401 .get_authorizer = get_authorizer,
5402 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 5403 .invalidate_authorizer = invalidate_authorizer,
f24e9980 5404 .alloc_msg = alloc_msg,
8cb441c0 5405 .reencode_message = osd_reencode_message,
79dbd1ba
ID		 5406 .sign_message = osd_sign_message,
5407 .check_message_signature = osd_check_message_signature,
5aea3dcd 5408 .fault = osd_fault,
f24e9980 5409};
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