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Merge tag 'imx-fixes-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo...
[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
89486833
ID		 129/*
130 * Consumes @pages if @own_pages is true.
131 */
a4ce40a9 132static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 133 struct page **pages, u64 length, u32 alignment,
134 bool pages_from_pool, bool own_pages)
135{
136 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
137 osd_data->pages = pages;
138 osd_data->length = length;
139 osd_data->alignment = alignment;
140 osd_data->pages_from_pool = pages_from_pool;
141 osd_data->own_pages = own_pages;
142}
43bfe5de 143
89486833
ID		 144/*
145 * Consumes a ref on @pagelist.
146 */
a4ce40a9 147static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 148 struct ceph_pagelist *pagelist)
149{
150 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
151 osd_data->pagelist = pagelist;
152}
43bfe5de
AE		 153
154#ifdef CONFIG_BLOCK
a4ce40a9 155static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
5359a17d
ID		 156 struct ceph_bio_iter *bio_pos,
157 u32 bio_length)
43bfe5de
AE		 158{
159 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
5359a17d 160 osd_data->bio_pos = *bio_pos;
43bfe5de
AE		 161 osd_data->bio_length = bio_length;
162}
43bfe5de
AE		 163#endif /* CONFIG_BLOCK */
164
b9e281c2 165static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
0010f705
ID		 166 struct ceph_bvec_iter *bvec_pos,
167 u32 num_bvecs)
b9e281c2
ID		 168{
169 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
170 osd_data->bvec_pos = *bvec_pos;
0010f705 171 osd_data->num_bvecs = num_bvecs;
b9e281c2
ID		 172}
173
49719778
AE		 174static struct ceph_osd_data *
175osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
176{
177 BUG_ON(which >= osd_req->r_num_ops);
178
179 return &osd_req->r_ops[which].raw_data_in;
180}
181
a4ce40a9
AE		 182struct ceph_osd_data *
183osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 184 unsigned int which)
a4ce40a9 185{
863c7eb5 186 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 187}
188EXPORT_SYMBOL(osd_req_op_extent_osd_data);
189
49719778
AE		 190void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
191 unsigned int which, struct page **pages,
192 u64 length, u32 alignment,
193 bool pages_from_pool, bool own_pages)
194{
195 struct ceph_osd_data *osd_data;
196
197 osd_data = osd_req_op_raw_data_in(osd_req, which);
198 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
199 pages_from_pool, own_pages);
200}
201EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
202
a4ce40a9 203void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 204 unsigned int which, struct page **pages,
205 u64 length, u32 alignment,
a4ce40a9
AE		 206 bool pages_from_pool, bool own_pages)
207{
208 struct ceph_osd_data *osd_data;
209
863c7eb5 210 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 211 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
212 pages_from_pool, own_pages);
a4ce40a9
AE		 213}
214EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
215
216void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 217 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 218{
219 struct ceph_osd_data *osd_data;
220
863c7eb5 221 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 222 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 223}
224EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
225
226#ifdef CONFIG_BLOCK
227void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
5359a17d
ID		 228 unsigned int which,
229 struct ceph_bio_iter *bio_pos,
230 u32 bio_length)
a4ce40a9
AE		 231{
232 struct ceph_osd_data *osd_data;
863c7eb5
AE		 233
234 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
5359a17d 235 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
a4ce40a9
AE		 236}
237EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
238#endif /* CONFIG_BLOCK */
239
0010f705
ID		 240void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
241 unsigned int which,
242 struct bio_vec *bvecs, u32 num_bvecs,
243 u32 bytes)
244{
245 struct ceph_osd_data *osd_data;
246 struct ceph_bvec_iter it = {
247 .bvecs = bvecs,
248 .iter = { .bi_size = bytes },
249 };
250
251 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
252 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
253}
254EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
255
b9e281c2
ID		 256void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
257 unsigned int which,
258 struct ceph_bvec_iter *bvec_pos)
259{
260 struct ceph_osd_data *osd_data;
261
262 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
0010f705 263 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
b9e281c2
ID		 264}
265EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
266
a4ce40a9
AE		 267static void osd_req_op_cls_request_info_pagelist(
268 struct ceph_osd_request *osd_req,
269 unsigned int which, struct ceph_pagelist *pagelist)
270{
271 struct ceph_osd_data *osd_data;
272
863c7eb5 273 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 274 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 275}
276
04017e29
AE		 277void osd_req_op_cls_request_data_pagelist(
278 struct ceph_osd_request *osd_req,
279 unsigned int which, struct ceph_pagelist *pagelist)
280{
281 struct ceph_osd_data *osd_data;
282
863c7eb5 283 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29 284 ceph_osd_data_pagelist_init(osd_data, pagelist);
bb873b53
ID		 285 osd_req->r_ops[which].cls.indata_len += pagelist->length;
286 osd_req->r_ops[which].indata_len += pagelist->length;
04017e29
AE		 287}
288EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
289
6c57b554
AE		 290void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
291 unsigned int which, struct page **pages, u64 length,
292 u32 alignment, bool pages_from_pool, bool own_pages)
293{
294 struct ceph_osd_data *osd_data;
295
296 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
297 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
298 pages_from_pool, own_pages);
bb873b53
ID		 299 osd_req->r_ops[which].cls.indata_len += length;
300 osd_req->r_ops[which].indata_len += length;
6c57b554
AE		 301}
302EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
303
b9e281c2
ID		 304void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
305 unsigned int which,
0010f705
ID		 306 struct bio_vec *bvecs, u32 num_bvecs,
307 u32 bytes)
b9e281c2
ID		 308{
309 struct ceph_osd_data *osd_data;
310 struct ceph_bvec_iter it = {
311 .bvecs = bvecs,
312 .iter = { .bi_size = bytes },
313 };
314
315 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
0010f705 316 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
b9e281c2
ID		 317 osd_req->r_ops[which].cls.indata_len += bytes;
318 osd_req->r_ops[which].indata_len += bytes;
319}
320EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
321
a4ce40a9
AE		 322void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
323 unsigned int which, struct page **pages, u64 length,
324 u32 alignment, bool pages_from_pool, bool own_pages)
325{
326 struct ceph_osd_data *osd_data;
327
863c7eb5 328 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 329 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
330 pages_from_pool, own_pages);
a4ce40a9
AE		 331}
332EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
333
23c08a9c
AE		 334static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
335{
336 switch (osd_data->type) {
337 case CEPH_OSD_DATA_TYPE_NONE:
338 return 0;
339 case CEPH_OSD_DATA_TYPE_PAGES:
340 return osd_data->length;
341 case CEPH_OSD_DATA_TYPE_PAGELIST:
342 return (u64)osd_data->pagelist->length;
343#ifdef CONFIG_BLOCK
344 case CEPH_OSD_DATA_TYPE_BIO:
345 return (u64)osd_data->bio_length;
346#endif /* CONFIG_BLOCK */
b9e281c2
ID		 347 case CEPH_OSD_DATA_TYPE_BVECS:
348 return osd_data->bvec_pos.iter.bi_size;
23c08a9c
AE		 349 default:
350 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
351 return 0;
352 }
353}
354
c54d47bf
AE		 355static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
356{
5476492f 357 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 358 int num_pages;
359
360 num_pages = calc_pages_for((u64)osd_data->alignment,
361 (u64)osd_data->length);
362 ceph_release_page_vector(osd_data->pages, num_pages);
89486833
ID		 363 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
364 ceph_pagelist_release(osd_data->pagelist);
c54d47bf 365 }
5476492f
AE		 366 ceph_osd_data_init(osd_data);
367}
368
369static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
370 unsigned int which)
371{
372 struct ceph_osd_req_op *op;
373
374 BUG_ON(which >= osd_req->r_num_ops);
375 op = &osd_req->r_ops[which];
376
377 switch (op->op) {
378 case CEPH_OSD_OP_READ:
379 case CEPH_OSD_OP_WRITE:
e30b7577 380 case CEPH_OSD_OP_WRITEFULL:
5476492f
AE		 381 ceph_osd_data_release(&op->extent.osd_data);
382 break;
383 case CEPH_OSD_OP_CALL:
384 ceph_osd_data_release(&op->cls.request_info);
04017e29 385 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 386 ceph_osd_data_release(&op->cls.response_data);
387 break;
d74b50be
YZ		 388 case CEPH_OSD_OP_SETXATTR:
389 case CEPH_OSD_OP_CMPXATTR:
390 ceph_osd_data_release(&op->xattr.osd_data);
391 break;
66ba609f
YZ		 392 case CEPH_OSD_OP_STAT:
393 ceph_osd_data_release(&op->raw_data_in);
394 break;
922dab61
ID		 395 case CEPH_OSD_OP_NOTIFY_ACK:
396 ceph_osd_data_release(&op->notify_ack.request_data);
397 break;
19079203
ID		 398 case CEPH_OSD_OP_NOTIFY:
399 ceph_osd_data_release(&op->notify.request_data);
400 ceph_osd_data_release(&op->notify.response_data);
401 break;
a4ed38d7
DF		 402 case CEPH_OSD_OP_LIST_WATCHERS:
403 ceph_osd_data_release(&op->list_watchers.response_data);
404 break;
78beb0ff 405 case CEPH_OSD_OP_COPY_FROM2:
23ddf9be
LH		 406 ceph_osd_data_release(&op->copy_from.osd_data);
407 break;
5476492f
AE		 408 default:
409 break;
410 }
c54d47bf
AE		 411}
412
63244fa1
ID		 413/*
414 * Assumes @t is zero-initialized.
415 */
416static void target_init(struct ceph_osd_request_target *t)
417{
418 ceph_oid_init(&t->base_oid);
419 ceph_oloc_init(&t->base_oloc);
420 ceph_oid_init(&t->target_oid);
421 ceph_oloc_init(&t->target_oloc);
422
423 ceph_osds_init(&t->acting);
424 ceph_osds_init(&t->up);
425 t->size = -1;
426 t->min_size = -1;
427
428 t->osd = CEPH_HOMELESS_OSD;
429}
430
922dab61
ID		 431static void target_copy(struct ceph_osd_request_target *dest,
432 const struct ceph_osd_request_target *src)
433{
434 ceph_oid_copy(&dest->base_oid, &src->base_oid);
435 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
436 ceph_oid_copy(&dest->target_oid, &src->target_oid);
437 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
438
439 dest->pgid = src->pgid; /* struct */
dc98ff72 440 dest->spgid = src->spgid; /* struct */
922dab61
ID		 441 dest->pg_num = src->pg_num;
442 dest->pg_num_mask = src->pg_num_mask;
443 ceph_osds_copy(&dest->acting, &src->acting);
444 ceph_osds_copy(&dest->up, &src->up);
445 dest->size = src->size;
446 dest->min_size = src->min_size;
447 dest->sort_bitwise = src->sort_bitwise;
2f3fead6 448 dest->recovery_deletes = src->recovery_deletes;
922dab61
ID		 449
450 dest->flags = src->flags;
7ed286f3 451 dest->used_replica = src->used_replica;
922dab61
ID		 452 dest->paused = src->paused;
453
04c7d789 454 dest->epoch = src->epoch;
dc93e0e2
ID		 455 dest->last_force_resend = src->last_force_resend;
456
922dab61
ID		 457 dest->osd = src->osd;
458}
459
63244fa1
ID		 460static void target_destroy(struct ceph_osd_request_target *t)
461{
462 ceph_oid_destroy(&t->base_oid);
30c156d9 463 ceph_oloc_destroy(&t->base_oloc);
63244fa1 464 ceph_oid_destroy(&t->target_oid);
30c156d9 465 ceph_oloc_destroy(&t->target_oloc);
63244fa1
ID		 466}
467
f24e9980
SW		 468/*
469 * requests
470 */
3540bfdb
ID		 471static void request_release_checks(struct ceph_osd_request *req)
472{
473 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
4609245e 474 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
94e85771 475 WARN_ON(!list_empty(&req->r_private_item));
3540bfdb
ID		 476 WARN_ON(req->r_osd);
477}
478
9e94af20 479static void ceph_osdc_release_request(struct kref *kref)
f24e9980 480{
9e94af20
ID		 481 struct ceph_osd_request *req = container_of(kref,
482 struct ceph_osd_request, r_kref);
5476492f 483 unsigned int which;
415e49a9 484
9e94af20
ID		 485 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
486 req->r_request, req->r_reply);
3540bfdb 487 request_release_checks(req);
9e94af20 488
415e49a9
SW		 489 if (req->r_request)
490 ceph_msg_put(req->r_request);
5aea3dcd 491 if (req->r_reply)
ab8cb34a 492 ceph_msg_put(req->r_reply);
0fff87ec 493
5476492f
AE		 494 for (which = 0; which < req->r_num_ops; which++)
495 osd_req_op_data_release(req, which);
0fff87ec 496
a66dd383 497 target_destroy(&req->r_t);
415e49a9 498 ceph_put_snap_context(req->r_snapc);
d30291b9 499
415e49a9
SW		 500 if (req->r_mempool)
501 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 502 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 503 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 504 else
505 kfree(req);
f24e9980 506}
9e94af20
ID		 507
508void ceph_osdc_get_request(struct ceph_osd_request *req)
509{
510 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 511 kref_read(&req->r_kref));
9e94af20
ID		 512 kref_get(&req->r_kref);
513}
514EXPORT_SYMBOL(ceph_osdc_get_request);
515
516void ceph_osdc_put_request(struct ceph_osd_request *req)
517{
3ed97d63
ID		 518 if (req) {
519 dout("%s %p (was %d)\n", __func__, req,
2c935bc5 520 kref_read(&req->r_kref));
3ed97d63
ID		 521 kref_put(&req->r_kref, ceph_osdc_release_request);
522 }
9e94af20
ID		 523}
524EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 525
3540bfdb
ID		 526static void request_init(struct ceph_osd_request *req)
527{
528 /* req only, each op is zeroed in _osd_req_op_init() */
529 memset(req, 0, sizeof(*req));
530
531 kref_init(&req->r_kref);
532 init_completion(&req->r_completion);
3540bfdb 533 RB_CLEAR_NODE(&req->r_node);
4609245e 534 RB_CLEAR_NODE(&req->r_mc_node);
94e85771 535 INIT_LIST_HEAD(&req->r_private_item);
3540bfdb
ID		 536
537 target_init(&req->r_t);
538}
539
922dab61
ID		 540/*
541 * This is ugly, but it allows us to reuse linger registration and ping
542 * requests, keeping the structure of the code around send_linger{_ping}()
543 * reasonable. Setting up a min_nr=2 mempool for each linger request
544 * and dealing with copying ops (this blasts req only, watch op remains
545 * intact) isn't any better.
546 */
547static void request_reinit(struct ceph_osd_request *req)
548{
549 struct ceph_osd_client *osdc = req->r_osdc;
550 bool mempool = req->r_mempool;
551 unsigned int num_ops = req->r_num_ops;
552 u64 snapid = req->r_snapid;
553 struct ceph_snap_context *snapc = req->r_snapc;
554 bool linger = req->r_linger;
555 struct ceph_msg *request_msg = req->r_request;
556 struct ceph_msg *reply_msg = req->r_reply;
557
558 dout("%s req %p\n", __func__, req);
2c935bc5 559 WARN_ON(kref_read(&req->r_kref) != 1);
922dab61
ID		 560 request_release_checks(req);
561
2c935bc5
PZ		 562 WARN_ON(kref_read(&request_msg->kref) != 1);
563 WARN_ON(kref_read(&reply_msg->kref) != 1);
922dab61
ID		 564 target_destroy(&req->r_t);
565
566 request_init(req);
567 req->r_osdc = osdc;
568 req->r_mempool = mempool;
569 req->r_num_ops = num_ops;
570 req->r_snapid = snapid;
571 req->r_snapc = snapc;
572 req->r_linger = linger;
573 req->r_request = request_msg;
574 req->r_reply = reply_msg;
575}
576
3499e8a5 577struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 578 struct ceph_snap_context *snapc,
1b83bef2 579 unsigned int num_ops,
3499e8a5 580 bool use_mempool,
54a54007 581 gfp_t gfp_flags)
f24e9980
SW		 582{
583 struct ceph_osd_request *req;
1b83bef2 584
f24e9980 585 if (use_mempool) {
3f1af42a 586 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 587 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 588 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
589 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 590 } else {
3f1af42a 591 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
acafe7e3 592 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
f24e9980 593 }
3f1af42a 594 if (unlikely(!req))
a79832f2 595 return NULL;
f24e9980 596
3540bfdb 597 request_init(req);
f24e9980
SW		 598 req->r_osdc = osdc;
599 req->r_mempool = use_mempool;
79528734 600 req->r_num_ops = num_ops;
84127282
ID		 601 req->r_snapid = CEPH_NOSNAP;
602 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 603
13d1ad16
ID		 604 dout("%s req %p\n", __func__, req);
605 return req;
606}
607EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 608
2e59ffd1 609static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
30c156d9
YZ		 610{
611 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
612}
613
0d9c1ab3
ID		 614static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
615 int num_request_data_items,
616 int num_reply_data_items)
13d1ad16
ID		 617{
618 struct ceph_osd_client *osdc = req->r_osdc;
619 struct ceph_msg *msg;
620 int msg_size;
c16e7869 621
0d9c1ab3 622 WARN_ON(req->r_request || req->r_reply);
d30291b9 623 WARN_ON(ceph_oid_empty(&req->r_base_oid));
30c156d9 624 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
d30291b9 625
13d1ad16 626 /* create request message */
8cb441c0
ID		 627 msg_size = CEPH_ENCODING_START_BLK_LEN +
628 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
629 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
630 msg_size += CEPH_ENCODING_START_BLK_LEN +
631 sizeof(struct ceph_osd_reqid); /* reqid */
632 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
633 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
30c156d9
YZ		 634 msg_size += CEPH_ENCODING_START_BLK_LEN +
635 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
13d1ad16
ID		 636 msg_size += 4 + req->r_base_oid.name_len; /* oid */
637 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 638 msg_size += 8; /* snapid */
639 msg_size += 8; /* snap_seq */
13d1ad16 640 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
8cb441c0 641 msg_size += 4 + 8; /* retry_attempt, features */
ae458f5a 642
13d1ad16 643 if (req->r_mempool)
0d9c1ab3
ID		 644 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
645 num_request_data_items);
f24e9980 646 else
0d9c1ab3
ID		 647 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
648 num_request_data_items, gfp, true);
13d1ad16
ID		 649 if (!msg)
650 return -ENOMEM;
68b4476b 651
f24e9980 652 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 653 req->r_request = msg;
3499e8a5 654
13d1ad16
ID		 655 /* create reply message */
656 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 657 msg_size += req->r_base_oid.name_len;
658 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 659
660 if (req->r_mempool)
0d9c1ab3
ID		 661 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
662 num_reply_data_items);
13d1ad16 663 else
0d9c1ab3
ID		 664 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
665 num_reply_data_items, gfp, true);
13d1ad16
ID		 666 if (!msg)
667 return -ENOMEM;
668
669 req->r_reply = msg;
670
671 return 0;
3499e8a5
YS		 672}
673
a8dd0a37 674static bool osd_req_opcode_valid(u16 opcode)
68b4476b 675{
a8dd0a37 676 switch (opcode) {
70b5bfa3
ID		 677#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
678__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
679#undef GENERATE_CASE
a8dd0a37
AE		 680 default:
681 return false;
682 }
683}
684
0d9c1ab3
ID		 685static void get_num_data_items(struct ceph_osd_request *req,
686 int *num_request_data_items,
687 int *num_reply_data_items)
688{
689 struct ceph_osd_req_op *op;
690
691 *num_request_data_items = 0;
692 *num_reply_data_items = 0;
693
694 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
695 switch (op->op) {
696 /* request */
697 case CEPH_OSD_OP_WRITE:
698 case CEPH_OSD_OP_WRITEFULL:
699 case CEPH_OSD_OP_SETXATTR:
700 case CEPH_OSD_OP_CMPXATTR:
701 case CEPH_OSD_OP_NOTIFY_ACK:
78beb0ff 702 case CEPH_OSD_OP_COPY_FROM2:
0d9c1ab3
ID		 703 *num_request_data_items += 1;
704 break;
705
706 /* reply */
707 case CEPH_OSD_OP_STAT:
708 case CEPH_OSD_OP_READ:
709 case CEPH_OSD_OP_LIST_WATCHERS:
710 *num_reply_data_items += 1;
711 break;
712
713 /* both */
714 case CEPH_OSD_OP_NOTIFY:
715 *num_request_data_items += 1;
716 *num_reply_data_items += 1;
717 break;
718 case CEPH_OSD_OP_CALL:
719 *num_request_data_items += 2;
720 *num_reply_data_items += 1;
721 break;
722
723 default:
724 WARN_ON(!osd_req_opcode_valid(op->op));
725 break;
726 }
727 }
728}
729
730/*
731 * oid, oloc and OSD op opcode(s) must be filled in before this function
732 * is called.
733 */
734int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
735{
736 int num_request_data_items, num_reply_data_items;
737
738 get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
739 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
740 num_reply_data_items);
741}
742EXPORT_SYMBOL(ceph_osdc_alloc_messages);
743
33803f33
AE		 744/*
745 * This is an osd op init function for opcodes that have no data or
746 * other information associated with them. It also serves as a
747 * common init routine for all the other init functions, below.
748 */
c99d2d4a 749static struct ceph_osd_req_op *
49719778 750_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 751 u16 opcode, u32 flags)
33803f33 752{
c99d2d4a
AE		 753 struct ceph_osd_req_op *op;
754
755 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 756 BUG_ON(!osd_req_opcode_valid(opcode));
757
c99d2d4a 758 op = &osd_req->r_ops[which];
33803f33 759 memset(op, 0, sizeof (*op));
33803f33 760 op->op = opcode;
144cba14 761 op->flags = flags;
c99d2d4a
AE		 762
763 return op;
33803f33
AE		 764}
765
49719778 766void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 767 unsigned int which, u16 opcode, u32 flags)
49719778 768{
144cba14 769 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 770}
771EXPORT_SYMBOL(osd_req_op_init);
772
c99d2d4a
AE		 773void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
774 unsigned int which, u16 opcode,
33803f33
AE		 775 u64 offset, u64 length,
776 u64 truncate_size, u32 truncate_seq)
777{
144cba14
YZ		 778 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
779 opcode, 0);
33803f33
AE		 780 size_t payload_len = 0;
781
ad7a60de 782 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 783 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
784 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 785
33803f33
AE		 786 op->extent.offset = offset;
787 op->extent.length = length;
788 op->extent.truncate_size = truncate_size;
789 op->extent.truncate_seq = truncate_seq;
e30b7577 790 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 791 payload_len += length;
792
de2aa102 793 op->indata_len = payload_len;
33803f33
AE		 794}
795EXPORT_SYMBOL(osd_req_op_extent_init);
796
c99d2d4a
AE		 797void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
798 unsigned int which, u64 length)
e5975c7c 799{
c99d2d4a
AE		 800 struct ceph_osd_req_op *op;
801 u64 previous;
802
803 BUG_ON(which >= osd_req->r_num_ops);
804 op = &osd_req->r_ops[which];
805 previous = op->extent.length;
e5975c7c
AE		 806
807 if (length == previous)
808 return; /* Nothing to do */
809 BUG_ON(length > previous);
810
811 op->extent.length = length;
d641df81
YZ		 812 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
813 op->indata_len -= previous - length;
e5975c7c
AE		 814}
815EXPORT_SYMBOL(osd_req_op_extent_update);
816
2c63f49a
YZ		 817void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
818 unsigned int which, u64 offset_inc)
819{
820 struct ceph_osd_req_op *op, *prev_op;
821
822 BUG_ON(which + 1 >= osd_req->r_num_ops);
823
824 prev_op = &osd_req->r_ops[which];
825 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
826 /* dup previous one */
827 op->indata_len = prev_op->indata_len;
828 op->outdata_len = prev_op->outdata_len;
829 op->extent = prev_op->extent;
830 /* adjust offset */
831 op->extent.offset += offset_inc;
832 op->extent.length -= offset_inc;
833
834 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
835 op->indata_len -= offset_inc;
836}
837EXPORT_SYMBOL(osd_req_op_extent_dup_last);
838
fe943d50 839int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
24639ce5 840 const char *class, const char *method)
33803f33 841{
24639ce5 842 struct ceph_osd_req_op *op;
5f562df5 843 struct ceph_pagelist *pagelist;
33803f33
AE		 844 size_t payload_len = 0;
845 size_t size;
4766815b 846 int ret;
33803f33 847
24639ce5 848 op = _osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
33803f33 849
33165d47 850 pagelist = ceph_pagelist_alloc(GFP_NOFS);
fe943d50
CX		 851 if (!pagelist)
852 return -ENOMEM;
853
33803f33
AE		 854 op->cls.class_name = class;
855 size = strlen(class);
856 BUG_ON(size > (size_t) U8_MAX);
857 op->cls.class_len = size;
4766815b
DD		 858 ret = ceph_pagelist_append(pagelist, class, size);
859 if (ret)
860 goto err_pagelist_free;
33803f33
AE		 861 payload_len += size;
862
863 op->cls.method_name = method;
864 size = strlen(method);
865 BUG_ON(size > (size_t) U8_MAX);
866 op->cls.method_len = size;
4766815b
DD		 867 ret = ceph_pagelist_append(pagelist, method, size);
868 if (ret)
869 goto err_pagelist_free;
33803f33
AE		 870 payload_len += size;
871
a4ce40a9 872 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
de2aa102 873 op->indata_len = payload_len;
fe943d50 874 return 0;
4766815b
DD		 875
876err_pagelist_free:
877 ceph_pagelist_release(pagelist);
878 return ret;
33803f33
AE		 879}
880EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 881
d74b50be
YZ		 882int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
883 u16 opcode, const char *name, const void *value,
884 size_t size, u8 cmp_op, u8 cmp_mode)
885{
144cba14
YZ		 886 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
887 opcode, 0);
d74b50be
YZ		 888 struct ceph_pagelist *pagelist;
889 size_t payload_len;
4766815b 890 int ret;
d74b50be
YZ		 891
892 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
893
33165d47 894 pagelist = ceph_pagelist_alloc(GFP_NOFS);
d74b50be
YZ		 895 if (!pagelist)
896 return -ENOMEM;
897
d74b50be
YZ		 898 payload_len = strlen(name);
899 op->xattr.name_len = payload_len;
4766815b
DD		 900 ret = ceph_pagelist_append(pagelist, name, payload_len);
901 if (ret)
902 goto err_pagelist_free;
d74b50be
YZ		 903
904 op->xattr.value_len = size;
4766815b
DD		 905 ret = ceph_pagelist_append(pagelist, value, size);
906 if (ret)
907 goto err_pagelist_free;
d74b50be
YZ		 908 payload_len += size;
909
910 op->xattr.cmp_op = cmp_op;
911 op->xattr.cmp_mode = cmp_mode;
912
913 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 914 op->indata_len = payload_len;
d74b50be 915 return 0;
4766815b
DD		 916
917err_pagelist_free:
918 ceph_pagelist_release(pagelist);
919 return ret;
d74b50be
YZ		 920}
921EXPORT_SYMBOL(osd_req_op_xattr_init);
922
922dab61
ID		 923/*
924 * @watch_opcode: CEPH_OSD_WATCH_OP_*
925 */
926static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
927 u64 cookie, u8 watch_opcode)
33803f33 928{
922dab61 929 struct ceph_osd_req_op *op;
33803f33 930
922dab61 931 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
33803f33 932 op->watch.cookie = cookie;
922dab61
ID		 933 op->watch.op = watch_opcode;
934 op->watch.gen = 0;
33803f33 935}
33803f33 936
d3798acc
ID		 937/*
938 * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_*
939 */
c647b8a8
ID		 940void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
941 unsigned int which,
942 u64 expected_object_size,
d3798acc
ID		 943 u64 expected_write_size,
944 u32 flags)
c647b8a8
ID		 945{
946 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 947 CEPH_OSD_OP_SETALLOCHINT,
948 0);
c647b8a8
ID		 949
950 op->alloc_hint.expected_object_size = expected_object_size;
951 op->alloc_hint.expected_write_size = expected_write_size;
d3798acc 952 op->alloc_hint.flags = flags;
c647b8a8
ID		 953
954 /*
955 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
956 * not worth a feature bit. Set FAILOK per-op flag to make
957 * sure older osds don't trip over an unsupported opcode.
958 */
959 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
960}
961EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
962
90af3602 963static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 964 struct ceph_osd_data *osd_data)
965{
966 u64 length = ceph_osd_data_length(osd_data);
967
968 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
969 BUG_ON(length > (u64) SIZE_MAX);
970 if (length)
90af3602 971 ceph_msg_data_add_pages(msg, osd_data->pages,
e8862740 972 length, osd_data->alignment, false);
ec9123c5
AE		 973 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
974 BUG_ON(!length);
90af3602 975 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 976#ifdef CONFIG_BLOCK
977 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
5359a17d 978 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
ec9123c5 979#endif
b9e281c2
ID		 980 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
981 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
ec9123c5
AE		 982 } else {
983 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
984 }
985}
986
bb873b53
ID		 987static u32 osd_req_encode_op(struct ceph_osd_op *dst,
988 const struct ceph_osd_req_op *src)
a8dd0a37 989{
a8dd0a37
AE		 990 switch (src->op) {
991 case CEPH_OSD_OP_STAT:
992 break;
993 case CEPH_OSD_OP_READ:
994 case CEPH_OSD_OP_WRITE:
e30b7577 995 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 996 case CEPH_OSD_OP_ZERO:
ad7a60de 997 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37
AE		 998 dst->extent.offset = cpu_to_le64(src->extent.offset);
999 dst->extent.length = cpu_to_le64(src->extent.length);
1000 dst->extent.truncate_size =
1001 cpu_to_le64(src->extent.truncate_size);
1002 dst->extent.truncate_seq =
1003 cpu_to_le32(src->extent.truncate_seq);
1004 break;
1005 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 1006 dst->cls.class_len = src->cls.class_len;
1007 dst->cls.method_len = src->cls.method_len;
bb873b53 1008 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
a8dd0a37 1009 break;
a8dd0a37
AE		 1010 case CEPH_OSD_OP_WATCH:
1011 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
922dab61
ID		 1012 dst->watch.ver = cpu_to_le64(0);
1013 dst->watch.op = src->watch.op;
1014 dst->watch.gen = cpu_to_le32(src->watch.gen);
1015 break;
1016 case CEPH_OSD_OP_NOTIFY_ACK:
a8dd0a37 1017 break;
19079203
ID		 1018 case CEPH_OSD_OP_NOTIFY:
1019 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
1020 break;
a4ed38d7
DF		 1021 case CEPH_OSD_OP_LIST_WATCHERS:
1022 break;
c647b8a8
ID		 1023 case CEPH_OSD_OP_SETALLOCHINT:
1024 dst->alloc_hint.expected_object_size =
1025 cpu_to_le64(src->alloc_hint.expected_object_size);
1026 dst->alloc_hint.expected_write_size =
1027 cpu_to_le64(src->alloc_hint.expected_write_size);
d3798acc 1028 dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags);
c647b8a8 1029 break;
d74b50be
YZ		 1030 case CEPH_OSD_OP_SETXATTR:
1031 case CEPH_OSD_OP_CMPXATTR:
1032 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1033 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1034 dst->xattr.cmp_op = src->xattr.cmp_op;
1035 dst->xattr.cmp_mode = src->xattr.cmp_mode;
d74b50be 1036 break;
864e9197
YZ		 1037 case CEPH_OSD_OP_CREATE:
1038 case CEPH_OSD_OP_DELETE:
1039 break;
78beb0ff 1040 case CEPH_OSD_OP_COPY_FROM2:
23ddf9be
LH		 1041 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1042 dst->copy_from.src_version =
1043 cpu_to_le64(src->copy_from.src_version);
1044 dst->copy_from.flags = src->copy_from.flags;
1045 dst->copy_from.src_fadvise_flags =
1046 cpu_to_le32(src->copy_from.src_fadvise_flags);
1047 break;
a8dd0a37 1048 default:
4c46459c 1049 pr_err("unsupported osd opcode %s\n",
8f63ca2d 1050 ceph_osd_op_name(src->op));
4c46459c 1051 WARN_ON(1);
a8dd0a37
AE		 1052
1053 return 0;
68b4476b 1054 }
7b25bf5f 1055
a8dd0a37 1056 dst->op = cpu_to_le16(src->op);
7b25bf5f 1057 dst->flags = cpu_to_le32(src->flags);
de2aa102 1058 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 1059
bb873b53 1060 return src->indata_len;
68b4476b
YS		 1061}
1062
3499e8a5
YS		 1063/*
1064 * build new request AND message, calculate layout, and adjust file
1065 * extent as needed.
1066 *
1067 * if the file was recently truncated, we include information about its
1068 * old and new size so that the object can be updated appropriately. (we
1069 * avoid synchronously deleting truncated objects because it's slow.)
3499e8a5
YS		 1070 */
1071struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1072 struct ceph_file_layout *layout,
1073 struct ceph_vino vino,
715e4cd4
YZ		 1074 u64 off, u64 *plen,
1075 unsigned int which, int num_ops,
3499e8a5
YS		 1076 int opcode, int flags,
1077 struct ceph_snap_context *snapc,
3499e8a5
YS		 1078 u32 truncate_seq,
1079 u64 truncate_size,
153e5167 1080 bool use_mempool)
3499e8a5 1081{
68b4476b 1082 struct ceph_osd_request *req;
75d1c941
AE		 1083 u64 objnum = 0;
1084 u64 objoff = 0;
1085 u64 objlen = 0;
6816282d 1086 int r;
68b4476b 1087
ad7a60de 1088 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 1089 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1090 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 1091
acead002 1092 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 1093 GFP_NOFS);
13d1ad16
ID		 1094 if (!req) {
1095 r = -ENOMEM;
1096 goto fail;
1097 }
79528734 1098
3499e8a5 1099 /* calculate max write size */
a19dadfb 1100 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 1101 if (r)
1102 goto fail;
a19dadfb 1103
864e9197 1104 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 1105 osd_req_op_init(req, which, opcode, 0);
864e9197 1106 } else {
7627151e 1107 u32 object_size = layout->object_size;
864e9197
YZ		 1108 u32 object_base = off - objoff;
1109 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1110 if (truncate_size <= object_base) {
1111 truncate_size = 0;
1112 } else {
1113 truncate_size -= object_base;
1114 if (truncate_size > object_size)
1115 truncate_size = object_size;
1116 }
ccca4e37 1117 }
715e4cd4 1118 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 1119 truncate_size, truncate_seq);
1120 }
d18d1e28 1121
7627151e 1122 req->r_base_oloc.pool = layout->pool_id;
30c156d9 1123 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
d30291b9 1124 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
22d2cfdf 1125 req->r_flags = flags | osdc->client->options->read_from_replica;
dbe0fc41 1126
bb873b53
ID		 1127 req->r_snapid = vino.snap;
1128 if (flags & CEPH_OSD_FLAG_WRITE)
1129 req->r_data_offset = off;
1130
0d9c1ab3
ID		 1131 if (num_ops > 1)
1132 /*
1133 * This is a special case for ceph_writepages_start(), but it
1134 * also covers ceph_uninline_data(). If more multi-op request
1135 * use cases emerge, we will need a separate helper.
1136 */
1137 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
1138 else
1139 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
13d1ad16
ID		 1140 if (r)
1141 goto fail;
1142
f24e9980 1143 return req;
13d1ad16
ID		 1144
1145fail:
1146 ceph_osdc_put_request(req);
1147 return ERR_PTR(r);
f24e9980 1148}
3d14c5d2 1149EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 1150
1151/*
1152 * We keep osd requests in an rbtree, sorted by ->r_tid.
1153 */
fcd00b68 1154DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
4609245e 1155DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
f24e9980 1156
66850df5
ID		 1157/*
1158 * Call @fn on each OSD request as long as @fn returns 0.
1159 */
1160static void for_each_request(struct ceph_osd_client *osdc,
1161 int (*fn)(struct ceph_osd_request *req, void *arg),
1162 void *arg)
1163{
1164 struct rb_node *n, *p;
1165
1166 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1167 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1168
1169 for (p = rb_first(&osd->o_requests); p; ) {
1170 struct ceph_osd_request *req =
1171 rb_entry(p, struct ceph_osd_request, r_node);
1172
1173 p = rb_next(p);
1174 if (fn(req, arg))
1175 return;
1176 }
1177 }
1178
1179 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1180 struct ceph_osd_request *req =
1181 rb_entry(p, struct ceph_osd_request, r_node);
1182
1183 p = rb_next(p);
1184 if (fn(req, arg))
1185 return;
1186 }
1187}
1188
0247a0cf
ID		 1189static bool osd_homeless(struct ceph_osd *osd)
1190{
1191 return osd->o_osd == CEPH_HOMELESS_OSD;
1192}
1193
5aea3dcd 1194static bool osd_registered(struct ceph_osd *osd)
f24e9980 1195{
5aea3dcd 1196 verify_osdc_locked(osd->o_osdc);
f24e9980 1197
5aea3dcd 1198 return !RB_EMPTY_NODE(&osd->o_node);
f24e9980
SW		 1199}
1200
0247a0cf
ID		 1201/*
1202 * Assumes @osd is zero-initialized.
1203 */
1204static void osd_init(struct ceph_osd *osd)
1205{
02113a0f 1206 refcount_set(&osd->o_ref, 1);
0247a0cf 1207 RB_CLEAR_NODE(&osd->o_node);
5aea3dcd 1208 osd->o_requests = RB_ROOT;
922dab61 1209 osd->o_linger_requests = RB_ROOT;
a02a946d
ID		 1210 osd->o_backoff_mappings = RB_ROOT;
1211 osd->o_backoffs_by_id = RB_ROOT;
0247a0cf
ID		 1212 INIT_LIST_HEAD(&osd->o_osd_lru);
1213 INIT_LIST_HEAD(&osd->o_keepalive_item);
1214 osd->o_incarnation = 1;
5aea3dcd 1215 mutex_init(&osd->lock);
0247a0cf
ID		 1216}
1217
1218static void osd_cleanup(struct ceph_osd *osd)
1219{
1220 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
5aea3dcd 1221 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 1222 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
a02a946d
ID		 1223 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1224 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
0247a0cf
ID		 1225 WARN_ON(!list_empty(&osd->o_osd_lru));
1226 WARN_ON(!list_empty(&osd->o_keepalive_item));
1227
1228 if (osd->o_auth.authorizer) {
1229 WARN_ON(osd_homeless(osd));
1230 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1231 }
1232}
1233
f24e9980
SW		 1234/*
1235 * Track open sessions with osds.
1236 */
e10006f8 1237static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1238{
1239 struct ceph_osd *osd;
1240
0247a0cf
ID		 1241 WARN_ON(onum == CEPH_HOMELESS_OSD);
1242
7a28f59b 1243 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
0247a0cf 1244 osd_init(osd);
f24e9980 1245 osd->o_osdc = osdc;
e10006f8 1246 osd->o_osd = onum;
f24e9980 1247
b7a9e5dd 1248 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1249
f24e9980
SW		 1250 return osd;
1251}
1252
1253static struct ceph_osd *get_osd(struct ceph_osd *osd)
1254{
02113a0f
ER		 1255 if (refcount_inc_not_zero(&osd->o_ref)) {
1256 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1257 refcount_read(&osd->o_ref));
f24e9980
SW		 1258 return osd;
1259 } else {
1260 dout("get_osd %p FAIL\n", osd);
1261 return NULL;
1262 }
1263}
1264
1265static void put_osd(struct ceph_osd *osd)
1266{
02113a0f
ER		 1267 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1268 refcount_read(&osd->o_ref) - 1);
1269 if (refcount_dec_and_test(&osd->o_ref)) {
0247a0cf 1270 osd_cleanup(osd);
f24e9980 1271 kfree(osd);
79494d1b 1272 }
f24e9980
SW		 1273}
1274
fcd00b68
ID		 1275DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1276
9dd2845c 1277static void __move_osd_to_lru(struct ceph_osd *osd)
f5a2041b 1278{
9dd2845c
ID		 1279 struct ceph_osd_client *osdc = osd->o_osdc;
1280
1281 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
f5a2041b 1282 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1283
9dd2845c 1284 spin_lock(&osdc->osd_lru_lock);
f5a2041b 1285 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
9dd2845c
ID		 1286 spin_unlock(&osdc->osd_lru_lock);
1287
a319bf56 1288 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1289}
1290
9dd2845c 1291static void maybe_move_osd_to_lru(struct ceph_osd *osd)
bbf37ec3 1292{
5aea3dcd 1293 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1294 RB_EMPTY_ROOT(&osd->o_linger_requests))
9dd2845c 1295 __move_osd_to_lru(osd);
bbf37ec3
ID		 1296}
1297
f5a2041b
YS		 1298static void __remove_osd_from_lru(struct ceph_osd *osd)
1299{
9dd2845c
ID		 1300 struct ceph_osd_client *osdc = osd->o_osdc;
1301
1302 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1303
1304 spin_lock(&osdc->osd_lru_lock);
f5a2041b
YS		 1305 if (!list_empty(&osd->o_osd_lru))
1306 list_del_init(&osd->o_osd_lru);
9dd2845c 1307 spin_unlock(&osdc->osd_lru_lock);
f5a2041b
YS		 1308}
1309
5aea3dcd
ID		 1310/*
1311 * Close the connection and assign any leftover requests to the
1312 * homeless session.
1313 */
1314static void close_osd(struct ceph_osd *osd)
1315{
1316 struct ceph_osd_client *osdc = osd->o_osdc;
1317 struct rb_node *n;
1318
1319 verify_osdc_wrlocked(osdc);
1320 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1321
1322 ceph_con_close(&osd->o_con);
1323
1324 for (n = rb_first(&osd->o_requests); n; ) {
1325 struct ceph_osd_request *req =
1326 rb_entry(n, struct ceph_osd_request, r_node);
1327
1328 n = rb_next(n); /* unlink_request() */
1329
1330 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1331 unlink_request(osd, req);
1332 link_request(&osdc->homeless_osd, req);
1333 }
922dab61
ID		 1334 for (n = rb_first(&osd->o_linger_requests); n; ) {
1335 struct ceph_osd_linger_request *lreq =
1336 rb_entry(n, struct ceph_osd_linger_request, node);
1337
1338 n = rb_next(n); /* unlink_linger() */
1339
1340 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1341 lreq->linger_id);
1342 unlink_linger(osd, lreq);
1343 link_linger(&osdc->homeless_osd, lreq);
1344 }
a02a946d 1345 clear_backoffs(osd);
5aea3dcd
ID		 1346
1347 __remove_osd_from_lru(osd);
1348 erase_osd(&osdc->osds, osd);
1349 put_osd(osd);
1350}
1351
f24e9980
SW		 1352/*
1353 * reset osd connect
1354 */
5aea3dcd 1355static int reopen_osd(struct ceph_osd *osd)
f24e9980 1356{
c3acb181 1357 struct ceph_entity_addr *peer_addr;
f24e9980 1358
5aea3dcd
ID		 1359 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1360
1361 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1362 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
5aea3dcd 1363 close_osd(osd);
c3acb181
AE		 1364 return -ENODEV;
1365 }
1366
5aea3dcd 1367 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
c3acb181
AE		 1368 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1369 !ceph_con_opened(&osd->o_con)) {
5aea3dcd 1370 struct rb_node *n;
c3acb181 1371
0b4af2e8
ID		 1372 dout("osd addr hasn't changed and connection never opened, "
1373 "letting msgr retry\n");
87b315a5 1374 /* touch each r_stamp for handle_timeout()'s benfit */
5aea3dcd
ID		 1375 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1376 struct ceph_osd_request *req =
1377 rb_entry(n, struct ceph_osd_request, r_node);
87b315a5 1378 req->r_stamp = jiffies;
5aea3dcd 1379 }
c3acb181
AE		 1380
1381 return -EAGAIN;
f24e9980 1382 }
c3acb181
AE		 1383
1384 ceph_con_close(&osd->o_con);
1385 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1386 osd->o_incarnation++;
1387
1388 return 0;
f24e9980
SW		 1389}
1390
5aea3dcd
ID		 1391static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1392 bool wrlocked)
f24e9980 1393{
5aea3dcd 1394 struct ceph_osd *osd;
35f9f8a0 1395
5aea3dcd
ID		 1396 if (wrlocked)
1397 verify_osdc_wrlocked(osdc);
1398 else
1399 verify_osdc_locked(osdc);
f24e9980 1400
5aea3dcd
ID		 1401 if (o != CEPH_HOMELESS_OSD)
1402 osd = lookup_osd(&osdc->osds, o);
1403 else
1404 osd = &osdc->homeless_osd;
1405 if (!osd) {
1406 if (!wrlocked)
1407 return ERR_PTR(-EAGAIN);
0ba6478d 1408
5aea3dcd
ID		 1409 osd = create_osd(osdc, o);
1410 insert_osd(&osdc->osds, osd);
1411 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1412 &osdc->osdmap->osd_addr[osd->o_osd]);
0ba6478d 1413 }
f24e9980 1414
5aea3dcd
ID		 1415 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1416 return osd;
f24e9980
SW		 1417}
1418
1419/*
5aea3dcd
ID		 1420 * Create request <-> OSD session relation.
1421 *
1422 * @req has to be assigned a tid, @osd may be homeless.
f24e9980 1423 */
5aea3dcd 1424static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
f24e9980 1425{
5aea3dcd
ID		 1426 verify_osd_locked(osd);
1427 WARN_ON(!req->r_tid || req->r_osd);
1428 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1429 req, req->r_tid);
1430
1431 if (!osd_homeless(osd))
1432 __remove_osd_from_lru(osd);
1433 else
1434 atomic_inc(&osd->o_osdc->num_homeless);
1435
1436 get_osd(osd);
1437 insert_request(&osd->o_requests, req);
1438 req->r_osd = osd;
f24e9980
SW		 1439}
1440
5aea3dcd
ID		 1441static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1442{
1443 verify_osd_locked(osd);
1444 WARN_ON(req->r_osd != osd);
1445 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1446 req, req->r_tid);
1447
1448 req->r_osd = NULL;
1449 erase_request(&osd->o_requests, req);
1450 put_osd(osd);
1451
1452 if (!osd_homeless(osd))
1453 maybe_move_osd_to_lru(osd);
1454 else
1455 atomic_dec(&osd->o_osdc->num_homeless);
1456}
1457
63244fa1
ID		 1458static bool __pool_full(struct ceph_pg_pool_info *pi)
1459{
1460 return pi->flags & CEPH_POOL_FLAG_FULL;
1461}
1462
42c1b124
ID		 1463static bool have_pool_full(struct ceph_osd_client *osdc)
1464{
1465 struct rb_node *n;
1466
1467 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1468 struct ceph_pg_pool_info *pi =
1469 rb_entry(n, struct ceph_pg_pool_info, node);
1470
1471 if (__pool_full(pi))
1472 return true;
1473 }
1474
1475 return false;
1476}
1477
5aea3dcd
ID		 1478static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1479{
1480 struct ceph_pg_pool_info *pi;
1481
1482 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1483 if (!pi)
1484 return false;
1485
1486 return __pool_full(pi);
1487}
1488
d29adb34
JD		 1489/*
1490 * Returns whether a request should be blocked from being sent
1491 * based on the current osdmap and osd_client settings.
d29adb34 1492 */
63244fa1
ID		 1493static bool target_should_be_paused(struct ceph_osd_client *osdc,
1494 const struct ceph_osd_request_target *t,
1495 struct ceph_pg_pool_info *pi)
1496{
b7ec35b3
ID		 1497 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1498 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1499 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
63244fa1
ID		 1500 __pool_full(pi);
1501
6d637a54 1502 WARN_ON(pi->id != t->target_oloc.pool);
58eb7932
JL		 1503 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1504 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1505 (osdc->osdmap->epoch < osdc->epoch_barrier);
63244fa1
ID		 1506}
1507
117d96a0
ID		 1508static int pick_random_replica(const struct ceph_osds *acting)
1509{
1510 int i = prandom_u32() % acting->size;
1511
1512 dout("%s picked osd%d, primary osd%d\n", __func__,
1513 acting->osds[i], acting->primary);
1514 return i;
1515}
1516
1517/*
1518 * Picks the closest replica based on client's location given by
1519 * crush_location option. Prefers the primary if the locality is
1520 * the same.
1521 */
1522static int pick_closest_replica(struct ceph_osd_client *osdc,
1523 const struct ceph_osds *acting)
1524{
1525 struct ceph_options *opt = osdc->client->options;
1526 int best_i, best_locality;
1527 int i = 0, locality;
1528
1529 do {
1530 locality = ceph_get_crush_locality(osdc->osdmap,
1531 acting->osds[i],
1532 &opt->crush_locs);
1533 if (i == 0 ||
1534 (locality >= 0 && best_locality < 0) ||
1535 (locality >= 0 && best_locality >= 0 &&
1536 locality < best_locality)) {
1537 best_i = i;
1538 best_locality = locality;
1539 }
1540 } while (++i < acting->size);
1541
1542 dout("%s picked osd%d with locality %d, primary osd%d\n", __func__,
1543 acting->osds[best_i], best_locality, acting->primary);
1544 return best_i;
1545}
1546
63244fa1
ID		 1547enum calc_target_result {
1548 CALC_TARGET_NO_ACTION = 0,
1549 CALC_TARGET_NEED_RESEND,
1550 CALC_TARGET_POOL_DNE,
1551};
1552
1553static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1554 struct ceph_osd_request_target *t,
63244fa1
ID		 1555 bool any_change)
1556{
1557 struct ceph_pg_pool_info *pi;
1558 struct ceph_pg pgid, last_pgid;
1559 struct ceph_osds up, acting;
117d96a0
ID		 1560 bool is_read = t->flags & CEPH_OSD_FLAG_READ;
1561 bool is_write = t->flags & CEPH_OSD_FLAG_WRITE;
63244fa1 1562 bool force_resend = false;
84ed45df 1563 bool unpaused = false;
a5613724 1564 bool legacy_change = false;
7de030d6 1565 bool split = false;
b7ec35b3 1566 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
ae78dd81
ID		 1567 bool recovery_deletes = ceph_osdmap_flag(osdc,
1568 CEPH_OSDMAP_RECOVERY_DELETES);
63244fa1 1569 enum calc_target_result ct_res;
63244fa1 1570
04c7d789 1571 t->epoch = osdc->osdmap->epoch;
63244fa1
ID		 1572 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1573 if (!pi) {
1574 t->osd = CEPH_HOMELESS_OSD;
1575 ct_res = CALC_TARGET_POOL_DNE;
1576 goto out;
1577 }
1578
1579 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
dc93e0e2
ID		 1580 if (t->last_force_resend < pi->last_force_request_resend) {
1581 t->last_force_resend = pi->last_force_request_resend;
63244fa1 1582 force_resend = true;
dc93e0e2 1583 } else if (t->last_force_resend == 0) {
63244fa1
ID		 1584 force_resend = true;
1585 }
1586 }
63244fa1 1587
db098ec4
ID		 1588 /* apply tiering */
1589 ceph_oid_copy(&t->target_oid, &t->base_oid);
1590 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1591 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
117d96a0 1592 if (is_read && pi->read_tier >= 0)
63244fa1 1593 t->target_oloc.pool = pi->read_tier;
117d96a0 1594 if (is_write && pi->write_tier >= 0)
63244fa1 1595 t->target_oloc.pool = pi->write_tier;
6d637a54
ID		 1596
1597 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1598 if (!pi) {
1599 t->osd = CEPH_HOMELESS_OSD;
1600 ct_res = CALC_TARGET_POOL_DNE;
1601 goto out;
1602 }
63244fa1
ID		 1603 }
1604
a86f009f 1605 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
63244fa1
ID		 1606 last_pgid.pool = pgid.pool;
1607 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1608
df28152d 1609 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
63244fa1
ID		 1610 if (any_change &&
1611 ceph_is_new_interval(&t->acting,
1612 &acting,
1613 &t->up,
1614 &up,
1615 t->size,
1616 pi->size,
1617 t->min_size,
1618 pi->min_size,
1619 t->pg_num,
1620 pi->pg_num,
1621 t->sort_bitwise,
1622 sort_bitwise,
ae78dd81
ID		 1623 t->recovery_deletes,
1624 recovery_deletes,
63244fa1
ID		 1625 &last_pgid))
1626 force_resend = true;
1627
1628 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1629 t->paused = false;
84ed45df 1630 unpaused = true;
63244fa1 1631 }
84ed45df 1632 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
117d96a0
ID		 1633 ceph_osds_changed(&t->acting, &acting,
1634 t->used_replica || any_change);
7de030d6
ID		 1635 if (t->pg_num)
1636 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
63244fa1 1637
7de030d6 1638 if (legacy_change || force_resend || split) {
63244fa1 1639 t->pgid = pgid; /* struct */
df28152d 1640 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
63244fa1
ID		 1641 ceph_osds_copy(&t->acting, &acting);
1642 ceph_osds_copy(&t->up, &up);
1643 t->size = pi->size;
1644 t->min_size = pi->min_size;
1645 t->pg_num = pi->pg_num;
1646 t->pg_num_mask = pi->pg_num_mask;
1647 t->sort_bitwise = sort_bitwise;
ae78dd81 1648 t->recovery_deletes = recovery_deletes;
63244fa1 1649
117d96a0
ID		 1650 if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS |
1651 CEPH_OSD_FLAG_LOCALIZE_READS)) &&
1652 !is_write && pi->type == CEPH_POOL_TYPE_REP &&
1653 acting.size > 1) {
1654 int pos;
1655
1656 WARN_ON(!is_read || acting.osds[0] != acting.primary);
1657 if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) {
1658 pos = pick_random_replica(&acting);
1659 } else {
1660 pos = pick_closest_replica(osdc, &acting);
1661 }
1662 t->osd = acting.osds[pos];
1663 t->used_replica = pos > 0;
1664 } else {
1665 t->osd = acting.primary;
1666 t->used_replica = false;
1667 }
63244fa1
ID		 1668 }
1669
a5613724 1670 if (unpaused || legacy_change || force_resend || split)
84ed45df
ID		 1671 ct_res = CALC_TARGET_NEED_RESEND;
1672 else
1673 ct_res = CALC_TARGET_NO_ACTION;
1674
63244fa1 1675out:
a5613724
ID		 1676 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1677 legacy_change, force_resend, split, ct_res, t->osd);
63244fa1
ID		 1678 return ct_res;
1679}
1680
a02a946d
ID		 1681static struct ceph_spg_mapping *alloc_spg_mapping(void)
1682{
1683 struct ceph_spg_mapping *spg;
1684
1685 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1686 if (!spg)
1687 return NULL;
1688
1689 RB_CLEAR_NODE(&spg->node);
1690 spg->backoffs = RB_ROOT;
1691 return spg;
1692}
1693
1694static void free_spg_mapping(struct ceph_spg_mapping *spg)
1695{
1696 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1697 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1698
1699 kfree(spg);
1700}
1701
1702/*
1703 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1704 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1705 * defined only within a specific spgid; it does not pass anything to
1706 * children on split, or to another primary.
1707 */
1708DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1709 RB_BYPTR, const struct ceph_spg *, node)
1710
1711static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1712{
1713 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1714}
1715
1716static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1717 void **pkey, size_t *pkey_len)
1718{
1719 if (hoid->key_len) {
1720 *pkey = hoid->key;
1721 *pkey_len = hoid->key_len;
1722 } else {
1723 *pkey = hoid->oid;
1724 *pkey_len = hoid->oid_len;
1725 }
1726}
1727
1728static int compare_names(const void *name1, size_t name1_len,
1729 const void *name2, size_t name2_len)
1730{
1731 int ret;
1732
1733 ret = memcmp(name1, name2, min(name1_len, name2_len));
1734 if (!ret) {
1735 if (name1_len < name2_len)
1736 ret = -1;
1737 else if (name1_len > name2_len)
1738 ret = 1;
1739 }
1740 return ret;
1741}
1742
1743static int hoid_compare(const struct ceph_hobject_id *lhs,
1744 const struct ceph_hobject_id *rhs)
1745{
1746 void *effective_key1, *effective_key2;
1747 size_t effective_key1_len, effective_key2_len;
1748 int ret;
1749
1750 if (lhs->is_max < rhs->is_max)
1751 return -1;
1752 if (lhs->is_max > rhs->is_max)
1753 return 1;
1754
1755 if (lhs->pool < rhs->pool)
1756 return -1;
1757 if (lhs->pool > rhs->pool)
1758 return 1;
1759
1760 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1761 return -1;
1762 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1763 return 1;
1764
1765 ret = compare_names(lhs->nspace, lhs->nspace_len,
1766 rhs->nspace, rhs->nspace_len);
1767 if (ret)
1768 return ret;
1769
1770 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1771 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1772 ret = compare_names(effective_key1, effective_key1_len,
1773 effective_key2, effective_key2_len);
1774 if (ret)
1775 return ret;
1776
1777 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1778 if (ret)
1779 return ret;
1780
1781 if (lhs->snapid < rhs->snapid)
1782 return -1;
1783 if (lhs->snapid > rhs->snapid)
1784 return 1;
1785
1786 return 0;
1787}
1788
1789/*
1790 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1791 * compat stuff here.
1792 *
1793 * Assumes @hoid is zero-initialized.
1794 */
1795static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1796{
1797 u8 struct_v;
1798 u32 struct_len;
1799 int ret;
1800
1801 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1802 &struct_len);
1803 if (ret)
1804 return ret;
1805
1806 if (struct_v < 4) {
1807 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1808 goto e_inval;
1809 }
1810
1811 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1812 GFP_NOIO);
1813 if (IS_ERR(hoid->key)) {
1814 ret = PTR_ERR(hoid->key);
1815 hoid->key = NULL;
1816 return ret;
1817 }
1818
1819 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1820 GFP_NOIO);
1821 if (IS_ERR(hoid->oid)) {
1822 ret = PTR_ERR(hoid->oid);
1823 hoid->oid = NULL;
1824 return ret;
1825 }
1826
1827 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1828 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1829 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1830
1831 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1832 GFP_NOIO);
1833 if (IS_ERR(hoid->nspace)) {
1834 ret = PTR_ERR(hoid->nspace);
1835 hoid->nspace = NULL;
1836 return ret;
1837 }
1838
1839 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1840
1841 ceph_hoid_build_hash_cache(hoid);
1842 return 0;
1843
1844e_inval:
1845 return -EINVAL;
1846}
1847
1848static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1849{
1850 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1851 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1852}
1853
1854static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1855{
1856 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1857 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1858 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1859 ceph_encode_64(p, hoid->snapid);
1860 ceph_encode_32(p, hoid->hash);
1861 ceph_encode_8(p, hoid->is_max);
1862 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1863 ceph_encode_64(p, hoid->pool);
1864}
1865
1866static void free_hoid(struct ceph_hobject_id *hoid)
1867{
1868 if (hoid) {
1869 kfree(hoid->key);
1870 kfree(hoid->oid);
1871 kfree(hoid->nspace);
1872 kfree(hoid);
1873 }
1874}
1875
1876static struct ceph_osd_backoff *alloc_backoff(void)
1877{
1878 struct ceph_osd_backoff *backoff;
1879
1880 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1881 if (!backoff)
1882 return NULL;
1883
1884 RB_CLEAR_NODE(&backoff->spg_node);
1885 RB_CLEAR_NODE(&backoff->id_node);
1886 return backoff;
1887}
1888
1889static void free_backoff(struct ceph_osd_backoff *backoff)
1890{
1891 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1892 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1893
1894 free_hoid(backoff->begin);
1895 free_hoid(backoff->end);
1896 kfree(backoff);
1897}
1898
1899/*
1900 * Within a specific spgid, backoffs are managed by ->begin hoid.
1901 */
1902DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1903 RB_BYVAL, spg_node);
1904
1905static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1906 const struct ceph_hobject_id *hoid)
1907{
1908 struct rb_node *n = root->rb_node;
1909
1910 while (n) {
1911 struct ceph_osd_backoff *cur =
1912 rb_entry(n, struct ceph_osd_backoff, spg_node);
1913 int cmp;
1914
1915 cmp = hoid_compare(hoid, cur->begin);
1916 if (cmp < 0) {
1917 n = n->rb_left;
1918 } else if (cmp > 0) {
1919 if (hoid_compare(hoid, cur->end) < 0)
1920 return cur;
1921
1922 n = n->rb_right;
1923 } else {
1924 return cur;
1925 }
1926 }
1927
1928 return NULL;
1929}
1930
1931/*
1932 * Each backoff has a unique id within its OSD session.
1933 */
1934DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1935
1936static void clear_backoffs(struct ceph_osd *osd)
1937{
1938 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1939 struct ceph_spg_mapping *spg =
1940 rb_entry(rb_first(&osd->o_backoff_mappings),
1941 struct ceph_spg_mapping, node);
1942
1943 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1944 struct ceph_osd_backoff *backoff =
1945 rb_entry(rb_first(&spg->backoffs),
1946 struct ceph_osd_backoff, spg_node);
1947
1948 erase_backoff(&spg->backoffs, backoff);
1949 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1950 free_backoff(backoff);
1951 }
1952 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1953 free_spg_mapping(spg);
1954 }
1955}
1956
1957/*
1958 * Set up a temporary, non-owning view into @t.
1959 */
1960static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1961 const struct ceph_osd_request_target *t)
1962{
1963 hoid->key = NULL;
1964 hoid->key_len = 0;
1965 hoid->oid = t->target_oid.name;
1966 hoid->oid_len = t->target_oid.name_len;
1967 hoid->snapid = CEPH_NOSNAP;
1968 hoid->hash = t->pgid.seed;
1969 hoid->is_max = false;
1970 if (t->target_oloc.pool_ns) {
1971 hoid->nspace = t->target_oloc.pool_ns->str;
1972 hoid->nspace_len = t->target_oloc.pool_ns->len;
1973 } else {
1974 hoid->nspace = NULL;
1975 hoid->nspace_len = 0;
1976 }
1977 hoid->pool = t->target_oloc.pool;
1978 ceph_hoid_build_hash_cache(hoid);
1979}
1980
1981static bool should_plug_request(struct ceph_osd_request *req)
1982{
1983 struct ceph_osd *osd = req->r_osd;
1984 struct ceph_spg_mapping *spg;
1985 struct ceph_osd_backoff *backoff;
1986 struct ceph_hobject_id hoid;
1987
1988 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1989 if (!spg)
1990 return false;
1991
1992 hoid_fill_from_target(&hoid, &req->r_t);
1993 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1994 if (!backoff)
1995 return false;
1996
1997 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1998 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1999 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
2000 return true;
2001}
2002
0d9c1ab3
ID		 2003/*
2004 * Keep get_num_data_items() in sync with this function.
2005 */
98c4bfe9 2006static void setup_request_data(struct ceph_osd_request *req)
f24e9980 2007{
98c4bfe9
ID		 2008 struct ceph_msg *request_msg = req->r_request;
2009 struct ceph_msg *reply_msg = req->r_reply;
2010 struct ceph_osd_req_op *op;
bb873b53 2011
98c4bfe9 2012 if (req->r_request->num_data_items || req->r_reply->num_data_items)
bb873b53 2013 return;
f24e9980 2014
98c4bfe9
ID		 2015 WARN_ON(request_msg->data_length || reply_msg->data_length);
2016 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
bb873b53
ID		 2017 switch (op->op) {
2018 /* request */
2019 case CEPH_OSD_OP_WRITE:
2020 case CEPH_OSD_OP_WRITEFULL:
2021 WARN_ON(op->indata_len != op->extent.length);
98c4bfe9
ID		 2022 ceph_osdc_msg_data_add(request_msg,
2023 &op->extent.osd_data);
bb873b53
ID		 2024 break;
2025 case CEPH_OSD_OP_SETXATTR:
2026 case CEPH_OSD_OP_CMPXATTR:
2027 WARN_ON(op->indata_len != op->xattr.name_len +
2028 op->xattr.value_len);
98c4bfe9
ID		 2029 ceph_osdc_msg_data_add(request_msg,
2030 &op->xattr.osd_data);
bb873b53 2031 break;
922dab61 2032 case CEPH_OSD_OP_NOTIFY_ACK:
98c4bfe9 2033 ceph_osdc_msg_data_add(request_msg,
922dab61
ID		 2034 &op->notify_ack.request_data);
2035 break;
78beb0ff 2036 case CEPH_OSD_OP_COPY_FROM2:
23ddf9be
LH		 2037 ceph_osdc_msg_data_add(request_msg,
2038 &op->copy_from.osd_data);
2039 break;
bb873b53
ID		 2040
2041 /* reply */
2042 case CEPH_OSD_OP_STAT:
98c4bfe9 2043 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 2044 &op->raw_data_in);
2045 break;
2046 case CEPH_OSD_OP_READ:
98c4bfe9 2047 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 2048 &op->extent.osd_data);
2049 break;
a4ed38d7 2050 case CEPH_OSD_OP_LIST_WATCHERS:
98c4bfe9 2051 ceph_osdc_msg_data_add(reply_msg,
a4ed38d7
DF		 2052 &op->list_watchers.response_data);
2053 break;
bb873b53
ID		 2054
2055 /* both */
2056 case CEPH_OSD_OP_CALL:
2057 WARN_ON(op->indata_len != op->cls.class_len +
2058 op->cls.method_len +
2059 op->cls.indata_len);
98c4bfe9
ID		 2060 ceph_osdc_msg_data_add(request_msg,
2061 &op->cls.request_info);
bb873b53 2062 /* optional, can be NONE */
98c4bfe9
ID		 2063 ceph_osdc_msg_data_add(request_msg,
2064 &op->cls.request_data);
bb873b53 2065 /* optional, can be NONE */
98c4bfe9 2066 ceph_osdc_msg_data_add(reply_msg,
bb873b53
ID		 2067 &op->cls.response_data);
2068 break;
19079203 2069 case CEPH_OSD_OP_NOTIFY:
98c4bfe9 2070 ceph_osdc_msg_data_add(request_msg,
19079203 2071 &op->notify.request_data);
98c4bfe9 2072 ceph_osdc_msg_data_add(reply_msg,
19079203
ID		 2073 &op->notify.response_data);
2074 break;
bb873b53 2075 }
bb873b53 2076 }
bb873b53
ID		 2077}
2078
2e59ffd1
ID		 2079static void encode_pgid(void **p, const struct ceph_pg *pgid)
2080{
2081 ceph_encode_8(p, 1);
2082 ceph_encode_64(p, pgid->pool);
2083 ceph_encode_32(p, pgid->seed);
2084 ceph_encode_32(p, -1); /* preferred */
2085}
2086
8cb441c0
ID		 2087static void encode_spgid(void **p, const struct ceph_spg *spgid)
2088{
2089 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2090 encode_pgid(p, &spgid->pgid);
2091 ceph_encode_8(p, spgid->shard);
2092}
2093
2e59ffd1
ID		 2094static void encode_oloc(void **p, void *end,
2095 const struct ceph_object_locator *oloc)
2096{
2097 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2098 ceph_encode_64(p, oloc->pool);
2099 ceph_encode_32(p, -1); /* preferred */
2100 ceph_encode_32(p, 0); /* key len */
2101 if (oloc->pool_ns)
2102 ceph_encode_string(p, end, oloc->pool_ns->str,
2103 oloc->pool_ns->len);
2104 else
2105 ceph_encode_32(p, 0);
2106}
2107
8cb441c0
ID		 2108static void encode_request_partial(struct ceph_osd_request *req,
2109 struct ceph_msg *msg)
bb873b53
ID		 2110{
2111 void *p = msg->front.iov_base;
2112 void *const end = p + msg->front_alloc_len;
2113 u32 data_len = 0;
2114 int i;
2115
2116 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2117 /* snapshots aren't writeable */
2118 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2119 } else {
2120 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2121 req->r_data_offset || req->r_snapc);
2122 }
2123
98c4bfe9 2124 setup_request_data(req);
bb873b53 2125
8cb441c0
ID		 2126 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2127 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
bb873b53
ID		 2128 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2129 ceph_encode_32(&p, req->r_flags);
8cb441c0
ID		 2130
2131 /* reqid */
2132 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2133 memset(p, 0, sizeof(struct ceph_osd_reqid));
2134 p += sizeof(struct ceph_osd_reqid);
2135
2136 /* trace */
2137 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2138 p += sizeof(struct ceph_blkin_trace_info);
2139
2140 ceph_encode_32(&p, 0); /* client_inc, always 0 */
fac02ddf 2141 ceph_encode_timespec64(p, &req->r_mtime);
bb873b53 2142 p += sizeof(struct ceph_timespec);
aa26d662 2143
2e59ffd1 2144 encode_oloc(&p, end, &req->r_t.target_oloc);
2e59ffd1
ID		 2145 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2146 req->r_t.target_oid.name_len);
f24e9980 2147
bb873b53
ID		 2148 /* ops, can imply data */
2149 ceph_encode_16(&p, req->r_num_ops);
2150 for (i = 0; i < req->r_num_ops; i++) {
2151 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2152 p += sizeof(struct ceph_osd_op);
2153 }
26be8808 2154
bb873b53
ID		 2155 ceph_encode_64(&p, req->r_snapid); /* snapid */
2156 if (req->r_snapc) {
2157 ceph_encode_64(&p, req->r_snapc->seq);
2158 ceph_encode_32(&p, req->r_snapc->num_snaps);
2159 for (i = 0; i < req->r_snapc->num_snaps; i++)
2160 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2161 } else {
2162 ceph_encode_64(&p, 0); /* snap_seq */
2163 ceph_encode_32(&p, 0); /* snaps len */
2164 }
2165
2166 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
986e8989 2167 BUG_ON(p > end - 8); /* space for features */
bb873b53 2168
8cb441c0
ID		 2169 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2170 /* front_len is finalized in encode_request_finish() */
986e8989
ID		 2171 msg->front.iov_len = p - msg->front.iov_base;
2172 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
bb873b53
ID		 2173 msg->hdr.data_len = cpu_to_le32(data_len);
2174 /*
2175 * The header "data_off" is a hint to the receiver allowing it
2176 * to align received data into its buffers such that there's no
2177 * need to re-copy it before writing it to disk (direct I/O).
2178 */
2179 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
26be8808 2180
8cb441c0
ID		 2181 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2182 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2183}
2184
2185static void encode_request_finish(struct ceph_msg *msg)
2186{
2187 void *p = msg->front.iov_base;
986e8989 2188 void *const partial_end = p + msg->front.iov_len;
8cb441c0
ID		 2189 void *const end = p + msg->front_alloc_len;
2190
2191 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2192 /* luminous OSD -- encode features and be done */
986e8989 2193 p = partial_end;
8cb441c0
ID		 2194 ceph_encode_64(&p, msg->con->peer_features);
2195 } else {
2196 struct {
2197 char spgid[CEPH_ENCODING_START_BLK_LEN +
2198 CEPH_PGID_ENCODING_LEN + 1];
2199 __le32 hash;
2200 __le32 epoch;
2201 __le32 flags;
2202 char reqid[CEPH_ENCODING_START_BLK_LEN +
2203 sizeof(struct ceph_osd_reqid)];
2204 char trace[sizeof(struct ceph_blkin_trace_info)];
2205 __le32 client_inc;
2206 struct ceph_timespec mtime;
2207 } __packed head;
2208 struct ceph_pg pgid;
2209 void *oloc, *oid, *tail;
2210 int oloc_len, oid_len, tail_len;
2211 int len;
2212
2213 /*
2214 * Pre-luminous OSD -- reencode v8 into v4 using @head
2215 * as a temporary buffer. Encode the raw PG; the rest
2216 * is just a matter of moving oloc, oid and tail blobs
2217 * around.
2218 */
2219 memcpy(&head, p, sizeof(head));
2220 p += sizeof(head);
2221
2222 oloc = p;
2223 p += CEPH_ENCODING_START_BLK_LEN;
2224 pgid.pool = ceph_decode_64(&p);
2225 p += 4 + 4; /* preferred, key len */
2226 len = ceph_decode_32(&p);
2227 p += len; /* nspace */
2228 oloc_len = p - oloc;
2229
2230 oid = p;
2231 len = ceph_decode_32(&p);
2232 p += len;
2233 oid_len = p - oid;
2234
2235 tail = p;
986e8989 2236 tail_len = partial_end - p;
8cb441c0
ID		 2237
2238 p = msg->front.iov_base;
2239 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2240 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2241 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2242 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2243
2244 /* reassert_version */
2245 memset(p, 0, sizeof(struct ceph_eversion));
2246 p += sizeof(struct ceph_eversion);
2247
2248 BUG_ON(p >= oloc);
2249 memmove(p, oloc, oloc_len);
2250 p += oloc_len;
2251
2252 pgid.seed = le32_to_cpu(head.hash);
2253 encode_pgid(&p, &pgid); /* raw pg */
2254
2255 BUG_ON(p >= oid);
2256 memmove(p, oid, oid_len);
2257 p += oid_len;
2258
2259 /* tail -- ops, snapid, snapc, retry_attempt */
2260 BUG_ON(p >= tail);
2261 memmove(p, tail, tail_len);
2262 p += tail_len;
2263
2264 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2265 }
2266
2267 BUG_ON(p > end);
2268 msg->front.iov_len = p - msg->front.iov_base;
2269 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2270
2271 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2272 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2273 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2274 le16_to_cpu(msg->hdr.version));
bb873b53
ID		 2275}
2276
2277/*
2278 * @req has to be assigned a tid and registered.
2279 */
2280static void send_request(struct ceph_osd_request *req)
2281{
2282 struct ceph_osd *osd = req->r_osd;
2283
5aea3dcd 2284 verify_osd_locked(osd);
bb873b53
ID		 2285 WARN_ON(osd->o_osd != req->r_t.osd);
2286
a02a946d
ID		 2287 /* backoff? */
2288 if (should_plug_request(req))
2289 return;
2290
5aea3dcd
ID		 2291 /*
2292 * We may have a previously queued request message hanging
2293 * around. Cancel it to avoid corrupting the msgr.
2294 */
2295 if (req->r_sent)
2296 ceph_msg_revoke(req->r_request);
2297
bb873b53
ID		 2298 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2299 if (req->r_attempts)
2300 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2301 else
2302 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2303
8cb441c0 2304 encode_request_partial(req, req->r_request);
bb873b53 2305
04c7d789 2306 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 2307 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
dc98ff72 2308 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
04c7d789
ID		 2309 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2310 req->r_attempts);
bb873b53
ID		 2311
2312 req->r_t.paused = false;
2313 req->r_stamp = jiffies;
2314 req->r_attempts++;
2315
2316 req->r_sent = osd->o_incarnation;
2317 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2318 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
f24e9980
SW		 2319}
2320
42c1b124
ID		 2321static void maybe_request_map(struct ceph_osd_client *osdc)
2322{
2323 bool continuous = false;
2324
5aea3dcd 2325 verify_osdc_locked(osdc);
42c1b124
ID		 2326 WARN_ON(!osdc->osdmap->epoch);
2327
b7ec35b3
ID		 2328 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2329 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2330 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
42c1b124
ID		 2331 dout("%s osdc %p continuous\n", __func__, osdc);
2332 continuous = true;
2333 } else {
2334 dout("%s osdc %p onetime\n", __func__, osdc);
2335 }
2336
2337 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2338 osdc->osdmap->epoch + 1, continuous))
2339 ceph_monc_renew_subs(&osdc->client->monc);
2340}
2341
a1f4020a 2342static void complete_request(struct ceph_osd_request *req, int err);
4609245e
ID		 2343static void send_map_check(struct ceph_osd_request *req);
2344
5aea3dcd 2345static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
0bbfdfe8 2346{
5aea3dcd
ID		 2347 struct ceph_osd_client *osdc = req->r_osdc;
2348 struct ceph_osd *osd;
4609245e 2349 enum calc_target_result ct_res;
66850df5 2350 int err = 0;
5aea3dcd
ID		 2351 bool need_send = false;
2352 bool promoted = false;
0bbfdfe8 2353
b18b9550 2354 WARN_ON(req->r_tid);
5aea3dcd
ID		 2355 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2356
2357again:
8edf84ba 2358 ct_res = calc_target(osdc, &req->r_t, false);
4609245e
ID		 2359 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2360 goto promote;
2361
5aea3dcd
ID		 2362 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2363 if (IS_ERR(osd)) {
2364 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2365 goto promote;
0bbfdfe8
ID		 2366 }
2367
66850df5
ID		 2368 if (osdc->abort_err) {
2369 dout("req %p abort_err %d\n", req, osdc->abort_err);
2370 err = osdc->abort_err;
2371 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
58eb7932
JL		 2372 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2373 osdc->epoch_barrier);
2374 req->r_t.paused = true;
2375 maybe_request_map(osdc);
2376 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2377 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
5aea3dcd
ID		 2378 dout("req %p pausewr\n", req);
2379 req->r_t.paused = true;
2380 maybe_request_map(osdc);
2381 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
b7ec35b3 2382 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
5aea3dcd
ID		 2383 dout("req %p pauserd\n", req);
2384 req->r_t.paused = true;
2385 maybe_request_map(osdc);
2386 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2387 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2388 CEPH_OSD_FLAG_FULL_FORCE)) &&
b7ec35b3 2389 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
5aea3dcd
ID		 2390 pool_full(osdc, req->r_t.base_oloc.pool))) {
2391 dout("req %p full/pool_full\n", req);
02b2f549 2392 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
66850df5 2393 err = -ENOSPC;
29e87820
ID		 2394 } else {
2395 pr_warn_ratelimited("FULL or reached pool quota\n");
2396 req->r_t.paused = true;
2397 maybe_request_map(osdc);
2398 }
5aea3dcd
ID		 2399 } else if (!osd_homeless(osd)) {
2400 need_send = true;
0bbfdfe8 2401 } else {
5aea3dcd 2402 maybe_request_map(osdc);
0bbfdfe8
ID		 2403 }
2404
5aea3dcd
ID		 2405 mutex_lock(&osd->lock);
2406 /*
2407 * Assign the tid atomically with send_request() to protect
2408 * multiple writes to the same object from racing with each
2409 * other, resulting in out of order ops on the OSDs.
2410 */
2411 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2412 link_request(osd, req);
2413 if (need_send)
2414 send_request(req);
66850df5
ID		 2415 else if (err)
2416 complete_request(req, err);
5aea3dcd
ID		 2417 mutex_unlock(&osd->lock);
2418
6001567c 2419 if (!err && ct_res == CALC_TARGET_POOL_DNE)
4609245e
ID		 2420 send_map_check(req);
2421
5aea3dcd
ID		 2422 if (promoted)
2423 downgrade_write(&osdc->lock);
2424 return;
2425
2426promote:
2427 up_read(&osdc->lock);
2428 down_write(&osdc->lock);
2429 wrlocked = true;
2430 promoted = true;
2431 goto again;
2432}
2433
2434static void account_request(struct ceph_osd_request *req)
2435{
54ea0046 2436 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
b18b9550 2437 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
5aea3dcd 2438
b18b9550 2439 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
22d2cfdf 2440 atomic_inc(&req->r_osdc->num_requests);
7cc5e38f
ID		 2441
2442 req->r_start_stamp = jiffies;
97e27aaa 2443 req->r_start_latency = ktime_get();
5aea3dcd
ID		 2444}
2445
2446static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2447{
2448 ceph_osdc_get_request(req);
2449 account_request(req);
2450 __submit_request(req, wrlocked);
2451}
2452
45ee2c1d 2453static void finish_request(struct ceph_osd_request *req)
5aea3dcd
ID		 2454{
2455 struct ceph_osd_client *osdc = req->r_osdc;
5aea3dcd 2456
04c7d789 2457 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
5aea3dcd
ID		 2458 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2459
97e27aaa
XL		 2460 req->r_end_latency = ktime_get();
2461
04c7d789
ID		 2462 if (req->r_osd)
2463 unlink_request(req->r_osd, req);
5aea3dcd
ID		 2464 atomic_dec(&osdc->num_requests);
2465
2466 /*
2467 * If an OSD has failed or returned and a request has been sent
2468 * twice, it's possible to get a reply and end up here while the
2469 * request message is queued for delivery. We will ignore the
2470 * reply, so not a big deal, but better to try and catch it.
2471 */
2472 ceph_msg_revoke(req->r_request);
2473 ceph_msg_revoke_incoming(req->r_reply);
2474}
2475
fe5da05e
ID		 2476static void __complete_request(struct ceph_osd_request *req)
2477{
d75f773c 2478 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
26df726b
ID		 2479 req->r_tid, req->r_callback, req->r_result);
2480
2481 if (req->r_callback)
fe5da05e 2482 req->r_callback(req);
26df726b
ID		 2483 complete_all(&req->r_completion);
2484 ceph_osdc_put_request(req);
fe5da05e
ID		 2485}
2486
88bc1922
ID		 2487static void complete_request_workfn(struct work_struct *work)
2488{
2489 struct ceph_osd_request *req =
2490 container_of(work, struct ceph_osd_request, r_complete_work);
2491
2492 __complete_request(req);
fe5da05e
ID		 2493}
2494
4609245e 2495/*
b18b9550 2496 * This is open-coded in handle_reply().
4609245e
ID		 2497 */
2498static void complete_request(struct ceph_osd_request *req, int err)
2499{
2500 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2501
2502 req->r_result = err;
45ee2c1d 2503 finish_request(req);
88bc1922
ID		 2504
2505 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2506 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
4609245e
ID		 2507}
2508
2509static void cancel_map_check(struct ceph_osd_request *req)
2510{
2511 struct ceph_osd_client *osdc = req->r_osdc;
2512 struct ceph_osd_request *lookup_req;
2513
2514 verify_osdc_wrlocked(osdc);
2515
2516 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2517 if (!lookup_req)
2518 return;
2519
2520 WARN_ON(lookup_req != req);
2521 erase_request_mc(&osdc->map_checks, req);
2522 ceph_osdc_put_request(req);
2523}
2524
5aea3dcd
ID		 2525static void cancel_request(struct ceph_osd_request *req)
2526{
2527 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2528
4609245e 2529 cancel_map_check(req);
45ee2c1d 2530 finish_request(req);
b18b9550 2531 complete_all(&req->r_completion);
c297eb42 2532 ceph_osdc_put_request(req);
5aea3dcd
ID		 2533}
2534
7cc5e38f
ID		 2535static void abort_request(struct ceph_osd_request *req, int err)
2536{
2537 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2538
2539 cancel_map_check(req);
2540 complete_request(req, err);
2541}
2542
66850df5
ID		 2543static int abort_fn(struct ceph_osd_request *req, void *arg)
2544{
2545 int err = *(int *)arg;
2546
2547 abort_request(req, err);
2548 return 0; /* continue iteration */
2549}
2550
2551/*
2552 * Abort all in-flight requests with @err and arrange for all future
2553 * requests to be failed immediately.
2554 */
2555void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2556{
2557 dout("%s osdc %p err %d\n", __func__, osdc, err);
2558 down_write(&osdc->lock);
2559 for_each_request(osdc, abort_fn, &err);
2560 osdc->abort_err = err;
2561 up_write(&osdc->lock);
2562}
2563EXPORT_SYMBOL(ceph_osdc_abort_requests);
2564
2cef0ba8
YZ		 2565void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc)
2566{
2567 down_write(&osdc->lock);
2568 osdc->abort_err = 0;
2569 up_write(&osdc->lock);
2570}
2571EXPORT_SYMBOL(ceph_osdc_clear_abort_err);
2572
58eb7932
JL		 2573static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2574{
2575 if (likely(eb > osdc->epoch_barrier)) {
2576 dout("updating epoch_barrier from %u to %u\n",
2577 osdc->epoch_barrier, eb);
2578 osdc->epoch_barrier = eb;
2579 /* Request map if we're not to the barrier yet */
2580 if (eb > osdc->osdmap->epoch)
2581 maybe_request_map(osdc);
2582 }
2583}
2584
2585void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2586{
2587 down_read(&osdc->lock);
2588 if (unlikely(eb > osdc->epoch_barrier)) {
2589 up_read(&osdc->lock);
2590 down_write(&osdc->lock);
2591 update_epoch_barrier(osdc, eb);
2592 up_write(&osdc->lock);
2593 } else {
2594 up_read(&osdc->lock);
2595 }
2596}
2597EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2598
4eea0fef
ID		 2599/*
2600 * We can end up releasing caps as a result of abort_request().
2601 * In that case, we probably want to ensure that the cap release message
2602 * has an updated epoch barrier in it, so set the epoch barrier prior to
2603 * aborting the first request.
2604 */
2605static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2606{
2607 struct ceph_osd_client *osdc = req->r_osdc;
2608 bool *victims = arg;
2609
c843d13c 2610 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
4eea0fef 2611 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
690f951d 2612 pool_full(osdc, req->r_t.base_oloc.pool))) {
4eea0fef
ID		 2613 if (!*victims) {
2614 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2615 *victims = true;
2616 }
2617 abort_request(req, -ENOSPC);
2618 }
2619
2620 return 0; /* continue iteration */
2621}
2622
fc36d0a4
JL		 2623/*
2624 * Drop all pending requests that are stalled waiting on a full condition to
58eb7932
JL		 2625 * clear, and complete them with ENOSPC as the return code. Set the
2626 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2627 * cancelled.
fc36d0a4
JL		 2628 */
2629static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2630{
58eb7932 2631 bool victims = false;
fc36d0a4 2632
02b2f549 2633 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
c843d13c 2634 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
4eea0fef 2635 for_each_request(osdc, abort_on_full_fn, &victims);
fc36d0a4
JL		 2636}
2637
4609245e
ID		 2638static void check_pool_dne(struct ceph_osd_request *req)
2639{
2640 struct ceph_osd_client *osdc = req->r_osdc;
2641 struct ceph_osdmap *map = osdc->osdmap;
2642
2643 verify_osdc_wrlocked(osdc);
2644 WARN_ON(!map->epoch);
2645
2646 if (req->r_attempts) {
2647 /*
2648 * We sent a request earlier, which means that
2649 * previously the pool existed, and now it does not
2650 * (i.e., it was deleted).
2651 */
2652 req->r_map_dne_bound = map->epoch;
2653 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2654 req->r_tid);
2655 } else {
2656 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2657 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2658 }
2659
2660 if (req->r_map_dne_bound) {
2661 if (map->epoch >= req->r_map_dne_bound) {
2662 /* we had a new enough map */
2663 pr_info_ratelimited("tid %llu pool does not exist\n",
2664 req->r_tid);
2665 complete_request(req, -ENOENT);
2666 }
2667 } else {
2668 send_map_check(req);
2669 }
2670}
2671
2672static void map_check_cb(struct ceph_mon_generic_request *greq)
2673{
2674 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2675 struct ceph_osd_request *req;
2676 u64 tid = greq->private_data;
2677
2678 WARN_ON(greq->result || !greq->u.newest);
2679
2680 down_write(&osdc->lock);
2681 req = lookup_request_mc(&osdc->map_checks, tid);
2682 if (!req) {
2683 dout("%s tid %llu dne\n", __func__, tid);
2684 goto out_unlock;
2685 }
2686
2687 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2688 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2689 if (!req->r_map_dne_bound)
2690 req->r_map_dne_bound = greq->u.newest;
2691 erase_request_mc(&osdc->map_checks, req);
2692 check_pool_dne(req);
2693
2694 ceph_osdc_put_request(req);
2695out_unlock:
2696 up_write(&osdc->lock);
2697}
2698
2699static void send_map_check(struct ceph_osd_request *req)
2700{
2701 struct ceph_osd_client *osdc = req->r_osdc;
2702 struct ceph_osd_request *lookup_req;
2703 int ret;
2704
2705 verify_osdc_wrlocked(osdc);
2706
2707 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2708 if (lookup_req) {
2709 WARN_ON(lookup_req != req);
2710 return;
2711 }
2712
2713 ceph_osdc_get_request(req);
2714 insert_request_mc(&osdc->map_checks, req);
2715 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2716 map_check_cb, req->r_tid);
2717 WARN_ON(ret);
2718}
2719
922dab61
ID		 2720/*
2721 * lingering requests, watch/notify v2 infrastructure
2722 */
2723static void linger_release(struct kref *kref)
2724{
2725 struct ceph_osd_linger_request *lreq =
2726 container_of(kref, struct ceph_osd_linger_request, kref);
2727
2728 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2729 lreq->reg_req, lreq->ping_req);
2730 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2731 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
4609245e 2732 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
922dab61 2733 WARN_ON(!list_empty(&lreq->scan_item));
b07d3c4b 2734 WARN_ON(!list_empty(&lreq->pending_lworks));
922dab61
ID		 2735 WARN_ON(lreq->osd);
2736
2737 if (lreq->reg_req)
2738 ceph_osdc_put_request(lreq->reg_req);
2739 if (lreq->ping_req)
2740 ceph_osdc_put_request(lreq->ping_req);
2741 target_destroy(&lreq->t);
2742 kfree(lreq);
2743}
2744
2745static void linger_put(struct ceph_osd_linger_request *lreq)
2746{
2747 if (lreq)
2748 kref_put(&lreq->kref, linger_release);
2749}
2750
2751static struct ceph_osd_linger_request *
2752linger_get(struct ceph_osd_linger_request *lreq)
2753{
2754 kref_get(&lreq->kref);
2755 return lreq;
2756}
2757
2758static struct ceph_osd_linger_request *
2759linger_alloc(struct ceph_osd_client *osdc)
2760{
2761 struct ceph_osd_linger_request *lreq;
2762
2763 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2764 if (!lreq)
2765 return NULL;
2766
2767 kref_init(&lreq->kref);
2768 mutex_init(&lreq->lock);
2769 RB_CLEAR_NODE(&lreq->node);
2770 RB_CLEAR_NODE(&lreq->osdc_node);
4609245e 2771 RB_CLEAR_NODE(&lreq->mc_node);
922dab61 2772 INIT_LIST_HEAD(&lreq->scan_item);
b07d3c4b 2773 INIT_LIST_HEAD(&lreq->pending_lworks);
922dab61 2774 init_completion(&lreq->reg_commit_wait);
19079203 2775 init_completion(&lreq->notify_finish_wait);
922dab61
ID		 2776
2777 lreq->osdc = osdc;
2778 target_init(&lreq->t);
2779
2780 dout("%s lreq %p\n", __func__, lreq);
2781 return lreq;
2782}
2783
2784DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2785DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
4609245e 2786DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
922dab61
ID		 2787
2788/*
2789 * Create linger request <-> OSD session relation.
2790 *
2791 * @lreq has to be registered, @osd may be homeless.
2792 */
2793static void link_linger(struct ceph_osd *osd,
2794 struct ceph_osd_linger_request *lreq)
2795{
2796 verify_osd_locked(osd);
2797 WARN_ON(!lreq->linger_id || lreq->osd);
2798 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2799 osd->o_osd, lreq, lreq->linger_id);
2800
2801 if (!osd_homeless(osd))
2802 __remove_osd_from_lru(osd);
2803 else
2804 atomic_inc(&osd->o_osdc->num_homeless);
2805
2806 get_osd(osd);
2807 insert_linger(&osd->o_linger_requests, lreq);
2808 lreq->osd = osd;
2809}
2810
2811static void unlink_linger(struct ceph_osd *osd,
2812 struct ceph_osd_linger_request *lreq)
2813{
2814 verify_osd_locked(osd);
2815 WARN_ON(lreq->osd != osd);
2816 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2817 osd->o_osd, lreq, lreq->linger_id);
2818
2819 lreq->osd = NULL;
2820 erase_linger(&osd->o_linger_requests, lreq);
2821 put_osd(osd);
2822
2823 if (!osd_homeless(osd))
2824 maybe_move_osd_to_lru(osd);
2825 else
2826 atomic_dec(&osd->o_osdc->num_homeless);
2827}
2828
2829static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2830{
2831 verify_osdc_locked(lreq->osdc);
2832
2833 return !RB_EMPTY_NODE(&lreq->osdc_node);
2834}
2835
2836static bool linger_registered(struct ceph_osd_linger_request *lreq)
2837{
2838 struct ceph_osd_client *osdc = lreq->osdc;
2839 bool registered;
2840
2841 down_read(&osdc->lock);
2842 registered = __linger_registered(lreq);
2843 up_read(&osdc->lock);
2844
2845 return registered;
2846}
2847
2848static void linger_register(struct ceph_osd_linger_request *lreq)
2849{
2850 struct ceph_osd_client *osdc = lreq->osdc;
2851
2852 verify_osdc_wrlocked(osdc);
2853 WARN_ON(lreq->linger_id);
2854
2855 linger_get(lreq);
2856 lreq->linger_id = ++osdc->last_linger_id;
2857 insert_linger_osdc(&osdc->linger_requests, lreq);
2858}
2859
2860static void linger_unregister(struct ceph_osd_linger_request *lreq)
2861{
2862 struct ceph_osd_client *osdc = lreq->osdc;
2863
2864 verify_osdc_wrlocked(osdc);
2865
2866 erase_linger_osdc(&osdc->linger_requests, lreq);
2867 linger_put(lreq);
2868}
2869
2870static void cancel_linger_request(struct ceph_osd_request *req)
2871{
2872 struct ceph_osd_linger_request *lreq = req->r_priv;
2873
2874 WARN_ON(!req->r_linger);
2875 cancel_request(req);
2876 linger_put(lreq);
2877}
2878
2879struct linger_work {
2880 struct work_struct work;
2881 struct ceph_osd_linger_request *lreq;
b07d3c4b
ID		 2882 struct list_head pending_item;
2883 unsigned long queued_stamp;
922dab61
ID		 2884
2885 union {
2886 struct {
2887 u64 notify_id;
2888 u64 notifier_id;
2889 void *payload; /* points into @msg front */
2890 size_t payload_len;
2891
2892 struct ceph_msg *msg; /* for ceph_msg_put() */
2893 } notify;
2894 struct {
2895 int err;
2896 } error;
2897 };
2898};
2899
2900static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2901 work_func_t workfn)
2902{
2903 struct linger_work *lwork;
2904
2905 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2906 if (!lwork)
2907 return NULL;
2908
2909 INIT_WORK(&lwork->work, workfn);
b07d3c4b 2910 INIT_LIST_HEAD(&lwork->pending_item);
922dab61
ID		 2911 lwork->lreq = linger_get(lreq);
2912
2913 return lwork;
2914}
2915
2916static void lwork_free(struct linger_work *lwork)
2917{
2918 struct ceph_osd_linger_request *lreq = lwork->lreq;
2919
b07d3c4b
ID		 2920 mutex_lock(&lreq->lock);
2921 list_del(&lwork->pending_item);
2922 mutex_unlock(&lreq->lock);
2923
922dab61
ID		 2924 linger_put(lreq);
2925 kfree(lwork);
2926}
2927
2928static void lwork_queue(struct linger_work *lwork)
2929{
2930 struct ceph_osd_linger_request *lreq = lwork->lreq;
2931 struct ceph_osd_client *osdc = lreq->osdc;
2932
2933 verify_lreq_locked(lreq);
b07d3c4b
ID		 2934 WARN_ON(!list_empty(&lwork->pending_item));
2935
2936 lwork->queued_stamp = jiffies;
2937 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
922dab61
ID		 2938 queue_work(osdc->notify_wq, &lwork->work);
2939}
2940
2941static void do_watch_notify(struct work_struct *w)
2942{
2943 struct linger_work *lwork = container_of(w, struct linger_work, work);
2944 struct ceph_osd_linger_request *lreq = lwork->lreq;
2945
2946 if (!linger_registered(lreq)) {
2947 dout("%s lreq %p not registered\n", __func__, lreq);
2948 goto out;
2949 }
2950
19079203 2951 WARN_ON(!lreq->is_watch);
922dab61
ID		 2952 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2953 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2954 lwork->notify.payload_len);
2955 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2956 lwork->notify.notifier_id, lwork->notify.payload,
2957 lwork->notify.payload_len);
2958
2959out:
2960 ceph_msg_put(lwork->notify.msg);
2961 lwork_free(lwork);
2962}
2963
2964static void do_watch_error(struct work_struct *w)
2965{
2966 struct linger_work *lwork = container_of(w, struct linger_work, work);
2967 struct ceph_osd_linger_request *lreq = lwork->lreq;
2968
2969 if (!linger_registered(lreq)) {
2970 dout("%s lreq %p not registered\n", __func__, lreq);
2971 goto out;
2972 }
2973
2974 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2975 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2976
2977out:
2978 lwork_free(lwork);
2979}
2980
2981static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2982{
2983 struct linger_work *lwork;
2984
2985 lwork = lwork_alloc(lreq, do_watch_error);
2986 if (!lwork) {
2987 pr_err("failed to allocate error-lwork\n");
2988 return;
2989 }
2990
2991 lwork->error.err = lreq->last_error;
2992 lwork_queue(lwork);
2993}
2994
2995static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2996 int result)
2997{
2998 if (!completion_done(&lreq->reg_commit_wait)) {
2999 lreq->reg_commit_error = (result <= 0 ? result : 0);
3000 complete_all(&lreq->reg_commit_wait);
3001 }
3002}
3003
3004static void linger_commit_cb(struct ceph_osd_request *req)
3005{
3006 struct ceph_osd_linger_request *lreq = req->r_priv;
3007
3008 mutex_lock(&lreq->lock);
3009 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
3010 lreq->linger_id, req->r_result);
922dab61
ID		 3011 linger_reg_commit_complete(lreq, req->r_result);
3012 lreq->committed = true;
3013
19079203
ID		 3014 if (!lreq->is_watch) {
3015 struct ceph_osd_data *osd_data =
3016 osd_req_op_data(req, 0, notify, response_data);
3017 void *p = page_address(osd_data->pages[0]);
3018
3019 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
3020 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
3021
3022 /* make note of the notify_id */
3023 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
3024 lreq->notify_id = ceph_decode_64(&p);
3025 dout("lreq %p notify_id %llu\n", lreq,
3026 lreq->notify_id);
3027 } else {
3028 dout("lreq %p no notify_id\n", lreq);
3029 }
3030 }
3031
922dab61
ID		 3032 mutex_unlock(&lreq->lock);
3033 linger_put(lreq);
3034}
3035
3036static int normalize_watch_error(int err)
3037{
3038 /*
3039 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
3040 * notification and a failure to reconnect because we raced with
3041 * the delete appear the same to the user.
3042 */
3043 if (err == -ENOENT)
3044 err = -ENOTCONN;
3045
3046 return err;
3047}
3048
3049static void linger_reconnect_cb(struct ceph_osd_request *req)
3050{
3051 struct ceph_osd_linger_request *lreq = req->r_priv;
3052
3053 mutex_lock(&lreq->lock);
3054 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
3055 lreq, lreq->linger_id, req->r_result, lreq->last_error);
3056 if (req->r_result < 0) {
3057 if (!lreq->last_error) {
3058 lreq->last_error = normalize_watch_error(req->r_result);
3059 queue_watch_error(lreq);
3060 }
3061 }
3062
3063 mutex_unlock(&lreq->lock);
3064 linger_put(lreq);
3065}
3066
3067static void send_linger(struct ceph_osd_linger_request *lreq)
3068{
3069 struct ceph_osd_request *req = lreq->reg_req;
3070 struct ceph_osd_req_op *op = &req->r_ops[0];
3071
3072 verify_osdc_wrlocked(req->r_osdc);
3073 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3074
3075 if (req->r_osd)
3076 cancel_linger_request(req);
3077
3078 request_reinit(req);
3079 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3080 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3081 req->r_flags = lreq->t.flags;
3082 req->r_mtime = lreq->mtime;
3083
3084 mutex_lock(&lreq->lock);
19079203 3085 if (lreq->is_watch && lreq->committed) {
922dab61
ID		 3086 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3087 op->watch.cookie != lreq->linger_id);
3088 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
3089 op->watch.gen = ++lreq->register_gen;
3090 dout("lreq %p reconnect register_gen %u\n", lreq,
3091 op->watch.gen);
3092 req->r_callback = linger_reconnect_cb;
3093 } else {
19079203
ID		 3094 if (!lreq->is_watch)
3095 lreq->notify_id = 0;
3096 else
3097 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 3098 dout("lreq %p register\n", lreq);
3099 req->r_callback = linger_commit_cb;
3100 }
3101 mutex_unlock(&lreq->lock);
3102
3103 req->r_priv = linger_get(lreq);
3104 req->r_linger = true;
3105
3106 submit_request(req, true);
3107}
3108
3109static void linger_ping_cb(struct ceph_osd_request *req)
3110{
3111 struct ceph_osd_linger_request *lreq = req->r_priv;
3112
3113 mutex_lock(&lreq->lock);
3114 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3115 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3116 lreq->last_error);
3117 if (lreq->register_gen == req->r_ops[0].watch.gen) {
b07d3c4b
ID		 3118 if (!req->r_result) {
3119 lreq->watch_valid_thru = lreq->ping_sent;
3120 } else if (!lreq->last_error) {
922dab61
ID		 3121 lreq->last_error = normalize_watch_error(req->r_result);
3122 queue_watch_error(lreq);
3123 }
3124 } else {
3125 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3126 lreq->register_gen, req->r_ops[0].watch.gen);
3127 }
3128
3129 mutex_unlock(&lreq->lock);
3130 linger_put(lreq);
3131}
3132
3133static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3134{
3135 struct ceph_osd_client *osdc = lreq->osdc;
3136 struct ceph_osd_request *req = lreq->ping_req;
3137 struct ceph_osd_req_op *op = &req->r_ops[0];
3138
b7ec35b3 3139 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
922dab61
ID		 3140 dout("%s PAUSERD\n", __func__);
3141 return;
3142 }
3143
3144 lreq->ping_sent = jiffies;
3145 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3146 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3147 lreq->register_gen);
3148
3149 if (req->r_osd)
3150 cancel_linger_request(req);
3151
3152 request_reinit(req);
3153 target_copy(&req->r_t, &lreq->t);
3154
3155 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3156 op->watch.cookie != lreq->linger_id ||
3157 op->watch.op != CEPH_OSD_WATCH_OP_PING);
3158 op->watch.gen = lreq->register_gen;
3159 req->r_callback = linger_ping_cb;
3160 req->r_priv = linger_get(lreq);
3161 req->r_linger = true;
3162
3163 ceph_osdc_get_request(req);
3164 account_request(req);
3165 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3166 link_request(lreq->osd, req);
3167 send_request(req);
3168}
3169
3170static void linger_submit(struct ceph_osd_linger_request *lreq)
3171{
3172 struct ceph_osd_client *osdc = lreq->osdc;
3173 struct ceph_osd *osd;
3174
81c65213
ID		 3175 down_write(&osdc->lock);
3176 linger_register(lreq);
3177 if (lreq->is_watch) {
3178 lreq->reg_req->r_ops[0].watch.cookie = lreq->linger_id;
3179 lreq->ping_req->r_ops[0].watch.cookie = lreq->linger_id;
3180 } else {
3181 lreq->reg_req->r_ops[0].notify.cookie = lreq->linger_id;
3182 }
3183
8edf84ba 3184 calc_target(osdc, &lreq->t, false);
922dab61
ID		 3185 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3186 link_linger(osd, lreq);
3187
3188 send_linger(lreq);
81c65213 3189 up_write(&osdc->lock);
922dab61
ID		 3190}
3191
4609245e
ID		 3192static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3193{
3194 struct ceph_osd_client *osdc = lreq->osdc;
3195 struct ceph_osd_linger_request *lookup_lreq;
3196
3197 verify_osdc_wrlocked(osdc);
3198
3199 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3200 lreq->linger_id);
3201 if (!lookup_lreq)
3202 return;
3203
3204 WARN_ON(lookup_lreq != lreq);
3205 erase_linger_mc(&osdc->linger_map_checks, lreq);
3206 linger_put(lreq);
3207}
3208
922dab61
ID		 3209/*
3210 * @lreq has to be both registered and linked.
3211 */
3212static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3213{
19079203 3214 if (lreq->is_watch && lreq->ping_req->r_osd)
922dab61
ID		 3215 cancel_linger_request(lreq->ping_req);
3216 if (lreq->reg_req->r_osd)
3217 cancel_linger_request(lreq->reg_req);
4609245e 3218 cancel_linger_map_check(lreq);
922dab61
ID		 3219 unlink_linger(lreq->osd, lreq);
3220 linger_unregister(lreq);
3221}
3222
3223static void linger_cancel(struct ceph_osd_linger_request *lreq)
3224{
3225 struct ceph_osd_client *osdc = lreq->osdc;
3226
3227 down_write(&osdc->lock);
3228 if (__linger_registered(lreq))
3229 __linger_cancel(lreq);
3230 up_write(&osdc->lock);
3231}
3232
4609245e
ID		 3233static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3234
3235static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3236{
3237 struct ceph_osd_client *osdc = lreq->osdc;
3238 struct ceph_osdmap *map = osdc->osdmap;
3239
3240 verify_osdc_wrlocked(osdc);
3241 WARN_ON(!map->epoch);
3242
3243 if (lreq->register_gen) {
3244 lreq->map_dne_bound = map->epoch;
3245 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3246 lreq, lreq->linger_id);
3247 } else {
3248 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3249 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3250 map->epoch);
3251 }
3252
3253 if (lreq->map_dne_bound) {
3254 if (map->epoch >= lreq->map_dne_bound) {
3255 /* we had a new enough map */
3256 pr_info("linger_id %llu pool does not exist\n",
3257 lreq->linger_id);
3258 linger_reg_commit_complete(lreq, -ENOENT);
3259 __linger_cancel(lreq);
3260 }
3261 } else {
3262 send_linger_map_check(lreq);
3263 }
3264}
3265
3266static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3267{
3268 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3269 struct ceph_osd_linger_request *lreq;
3270 u64 linger_id = greq->private_data;
3271
3272 WARN_ON(greq->result || !greq->u.newest);
3273
3274 down_write(&osdc->lock);
3275 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3276 if (!lreq) {
3277 dout("%s linger_id %llu dne\n", __func__, linger_id);
3278 goto out_unlock;
3279 }
3280
3281 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3282 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3283 greq->u.newest);
3284 if (!lreq->map_dne_bound)
3285 lreq->map_dne_bound = greq->u.newest;
3286 erase_linger_mc(&osdc->linger_map_checks, lreq);
3287 check_linger_pool_dne(lreq);
3288
3289 linger_put(lreq);
3290out_unlock:
3291 up_write(&osdc->lock);
3292}
3293
3294static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3295{
3296 struct ceph_osd_client *osdc = lreq->osdc;
3297 struct ceph_osd_linger_request *lookup_lreq;
3298 int ret;
3299
3300 verify_osdc_wrlocked(osdc);
3301
3302 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3303 lreq->linger_id);
3304 if (lookup_lreq) {
3305 WARN_ON(lookup_lreq != lreq);
3306 return;
3307 }
3308
3309 linger_get(lreq);
3310 insert_linger_mc(&osdc->linger_map_checks, lreq);
3311 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3312 linger_map_check_cb, lreq->linger_id);
3313 WARN_ON(ret);
3314}
3315
922dab61
ID		 3316static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3317{
3318 int ret;
3319
3320 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3321 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3322 return ret ?: lreq->reg_commit_error;
3323}
3324
19079203
ID		 3325static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3326{
3327 int ret;
3328
3329 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3330 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3331 return ret ?: lreq->notify_finish_error;
3332}
3333
f24e9980 3334/*
fbca9635
ID		 3335 * Timeout callback, called every N seconds. When 1 or more OSD
3336 * requests has been active for more than N seconds, we send a keepalive
3337 * (tag + timestamp) to its OSD to ensure any communications channel
3338 * reset is detected.
f24e9980
SW		 3339 */
3340static void handle_timeout(struct work_struct *work)
3341{
3342 struct ceph_osd_client *osdc =
3343 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 3344 struct ceph_options *opts = osdc->client->options;
5aea3dcd 3345 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
7cc5e38f 3346 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
5aea3dcd
ID		 3347 LIST_HEAD(slow_osds);
3348 struct rb_node *n, *p;
f24e9980 3349
5aea3dcd
ID		 3350 dout("%s osdc %p\n", __func__, osdc);
3351 down_write(&osdc->lock);
f24e9980 3352
422d2cb8
YS		 3353 /*
3354 * ping osds that are a bit slow. this ensures that if there
3355 * is a break in the TCP connection we will notice, and reopen
3356 * a connection with that osd (from the fault callback).
3357 */
5aea3dcd
ID		 3358 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3359 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3360 bool found = false;
3361
7cc5e38f 3362 for (p = rb_first(&osd->o_requests); p; ) {
5aea3dcd
ID		 3363 struct ceph_osd_request *req =
3364 rb_entry(p, struct ceph_osd_request, r_node);
3365
7cc5e38f
ID		 3366 p = rb_next(p); /* abort_request() */
3367
5aea3dcd
ID		 3368 if (time_before(req->r_stamp, cutoff)) {
3369 dout(" req %p tid %llu on osd%d is laggy\n",
3370 req, req->r_tid, osd->o_osd);
3371 found = true;
3372 }
7cc5e38f
ID		 3373 if (opts->osd_request_timeout &&
3374 time_before(req->r_start_stamp, expiry_cutoff)) {
3375 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3376 req->r_tid, osd->o_osd);
3377 abort_request(req, -ETIMEDOUT);
3378 }
5aea3dcd 3379 }
922dab61
ID		 3380 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3381 struct ceph_osd_linger_request *lreq =
3382 rb_entry(p, struct ceph_osd_linger_request, node);
3383
3384 dout(" lreq %p linger_id %llu is served by osd%d\n",
3385 lreq, lreq->linger_id, osd->o_osd);
3386 found = true;
3387
3388 mutex_lock(&lreq->lock);
19079203 3389 if (lreq->is_watch && lreq->committed && !lreq->last_error)
922dab61
ID		 3390 send_linger_ping(lreq);
3391 mutex_unlock(&lreq->lock);
3392 }
422d2cb8 3393
5aea3dcd
ID		 3394 if (found)
3395 list_move_tail(&osd->o_keepalive_item, &slow_osds);
422d2cb8 3396 }
5aea3dcd 3397
7cc5e38f
ID		 3398 if (opts->osd_request_timeout) {
3399 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3400 struct ceph_osd_request *req =
3401 rb_entry(p, struct ceph_osd_request, r_node);
3402
3403 p = rb_next(p); /* abort_request() */
3404
3405 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3406 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3407 req->r_tid, osdc->homeless_osd.o_osd);
3408 abort_request(req, -ETIMEDOUT);
3409 }
3410 }
3411 }
3412
5aea3dcd
ID		 3413 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3414 maybe_request_map(osdc);
3415
422d2cb8 3416 while (!list_empty(&slow_osds)) {
5aea3dcd
ID		 3417 struct ceph_osd *osd = list_first_entry(&slow_osds,
3418 struct ceph_osd,
3419 o_keepalive_item);
422d2cb8 3420 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 3421 ceph_con_keepalive(&osd->o_con);
3422 }
3423
5aea3dcd 3424 up_write(&osdc->lock);
fbca9635
ID		 3425 schedule_delayed_work(&osdc->timeout_work,
3426 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 3427}
3428
f5a2041b
YS		 3429static void handle_osds_timeout(struct work_struct *work)
3430{
3431 struct ceph_osd_client *osdc =
3432 container_of(work, struct ceph_osd_client,
3433 osds_timeout_work.work);
a319bf56 3434 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 3435 struct ceph_osd *osd, *nosd;
f5a2041b 3436
42a2c09f 3437 dout("%s osdc %p\n", __func__, osdc);
5aea3dcd 3438 down_write(&osdc->lock);
42a2c09f
ID		 3439 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3440 if (time_before(jiffies, osd->lru_ttl))
3441 break;
3442
5aea3dcd 3443 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 3444 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
5aea3dcd 3445 close_osd(osd);
42a2c09f 3446 }
f5a2041b 3447
5aea3dcd 3448 up_write(&osdc->lock);
f5a2041b
YS		 3449 schedule_delayed_work(&osdc->osds_timeout_work,
3450 round_jiffies_relative(delay));
3451}
3452
205ee118
ID		 3453static int ceph_oloc_decode(void **p, void *end,
3454 struct ceph_object_locator *oloc)
3455{
3456 u8 struct_v, struct_cv;
3457 u32 len;
3458 void *struct_end;
3459 int ret = 0;
3460
3461 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3462 struct_v = ceph_decode_8(p);
3463 struct_cv = ceph_decode_8(p);
3464 if (struct_v < 3) {
3465 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3466 struct_v, struct_cv);
3467 goto e_inval;
3468 }
3469 if (struct_cv > 6) {
3470 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3471 struct_v, struct_cv);
3472 goto e_inval;
3473 }
3474 len = ceph_decode_32(p);
3475 ceph_decode_need(p, end, len, e_inval);
3476 struct_end = *p + len;
3477
3478 oloc->pool = ceph_decode_64(p);
3479 *p += 4; /* skip preferred */
3480
3481 len = ceph_decode_32(p);
3482 if (len > 0) {
3483 pr_warn("ceph_object_locator::key is set\n");
3484 goto e_inval;
3485 }
3486
3487 if (struct_v >= 5) {
cd08e0a2
YZ		 3488 bool changed = false;
3489
205ee118
ID		 3490 len = ceph_decode_32(p);
3491 if (len > 0) {
30c156d9 3492 ceph_decode_need(p, end, len, e_inval);
cd08e0a2
YZ		 3493 if (!oloc->pool_ns ||
3494 ceph_compare_string(oloc->pool_ns, *p, len))
3495 changed = true;
30c156d9 3496 *p += len;
cd08e0a2
YZ		 3497 } else {
3498 if (oloc->pool_ns)
3499 changed = true;
3500 }
3501 if (changed) {
3502 /* redirect changes namespace */
3503 pr_warn("ceph_object_locator::nspace is changed\n");
3504 goto e_inval;
205ee118
ID		 3505 }
3506 }
3507
3508 if (struct_v >= 6) {
3509 s64 hash = ceph_decode_64(p);
3510 if (hash != -1) {
3511 pr_warn("ceph_object_locator::hash is set\n");
3512 goto e_inval;
3513 }
3514 }
3515
3516 /* skip the rest */
3517 *p = struct_end;
3518out:
3519 return ret;
3520
3521e_inval:
3522 ret = -EINVAL;
3523 goto out;
3524}
3525
3526static int ceph_redirect_decode(void **p, void *end,
3527 struct ceph_request_redirect *redir)
3528{
3529 u8 struct_v, struct_cv;
3530 u32 len;
3531 void *struct_end;
3532 int ret;
3533
3534 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3535 struct_v = ceph_decode_8(p);
3536 struct_cv = ceph_decode_8(p);
3537 if (struct_cv > 1) {
3538 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3539 struct_v, struct_cv);
3540 goto e_inval;
3541 }
3542 len = ceph_decode_32(p);
3543 ceph_decode_need(p, end, len, e_inval);
3544 struct_end = *p + len;
3545
3546 ret = ceph_oloc_decode(p, end, &redir->oloc);
3547 if (ret)
3548 goto out;
3549
3550 len = ceph_decode_32(p);
3551 if (len > 0) {
3552 pr_warn("ceph_request_redirect::object_name is set\n");
3553 goto e_inval;
3554 }
3555
205ee118
ID		 3556 /* skip the rest */
3557 *p = struct_end;
3558out:
3559 return ret;
3560
3561e_inval:
3562 ret = -EINVAL;
3563 goto out;
3564}
3565
fe5da05e
ID		 3566struct MOSDOpReply {
3567 struct ceph_pg pgid;
3568 u64 flags;
3569 int result;
3570 u32 epoch;
3571 int num_ops;
3572 u32 outdata_len[CEPH_OSD_MAX_OPS];
3573 s32 rval[CEPH_OSD_MAX_OPS];
3574 int retry_attempt;
3575 struct ceph_eversion replay_version;
3576 u64 user_version;
3577 struct ceph_request_redirect redirect;
3578};
25845472 3579
fe5da05e 3580static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 3581{
fe5da05e
ID		 3582 void *p = msg->front.iov_base;
3583 void *const end = p + msg->front.iov_len;
3584 u16 version = le16_to_cpu(msg->hdr.version);
3585 struct ceph_eversion bad_replay_version;
b0b31a8f 3586 u8 decode_redir;
fe5da05e
ID		 3587 u32 len;
3588 int ret;
3589 int i;
1b83bef2 3590
fe5da05e
ID		 3591 ceph_decode_32_safe(&p, end, len, e_inval);
3592 ceph_decode_need(&p, end, len, e_inval);
3593 p += len; /* skip oid */
1b83bef2 3594
fe5da05e
ID		 3595 ret = ceph_decode_pgid(&p, end, &m->pgid);
3596 if (ret)
3597 return ret;
1b83bef2 3598
fe5da05e
ID		 3599 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3600 ceph_decode_32_safe(&p, end, m->result, e_inval);
3601 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3602 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3603 p += sizeof(bad_replay_version);
3604 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 3605
fe5da05e
ID		 3606 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3607 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3608 goto e_inval;
1b83bef2 3609
fe5da05e
ID		 3610 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3611 e_inval);
3612 for (i = 0; i < m->num_ops; i++) {
1b83bef2 3613 struct ceph_osd_op *op = p;
1b83bef2 3614
fe5da05e 3615 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 3616 p += sizeof(*op);
3617 }
1b83bef2 3618
fe5da05e
ID		 3619 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3620 for (i = 0; i < m->num_ops; i++)
3621 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 3622
fe5da05e
ID		 3623 if (version >= 5) {
3624 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3625 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3626 p += sizeof(m->replay_version);
3627 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3628 } else {
3629 m->replay_version = bad_replay_version; /* struct */
3630 m->user_version = le64_to_cpu(m->replay_version.version);
3631 }
eb845ff1 3632
fe5da05e
ID		 3633 if (version >= 6) {
3634 if (version >= 7)
3635 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 3636 else
3637 decode_redir = 1;
3638 } else {
3639 decode_redir = 0;
3640 }
3641
3642 if (decode_redir) {
fe5da05e
ID		 3643 ret = ceph_redirect_decode(&p, end, &m->redirect);
3644 if (ret)
3645 return ret;
205ee118 3646 } else {
fe5da05e 3647 ceph_oloc_init(&m->redirect.oloc);
205ee118 3648 }
f24e9980 3649
fe5da05e
ID		 3650 return 0;
3651
3652e_inval:
3653 return -EINVAL;
3654}
3655
3656/*
b18b9550
ID		 3657 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3658 * specified.
fe5da05e 3659 */
5aea3dcd 3660static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
fe5da05e 3661{
5aea3dcd 3662 struct ceph_osd_client *osdc = osd->o_osdc;
fe5da05e
ID		 3663 struct ceph_osd_request *req;
3664 struct MOSDOpReply m;
3665 u64 tid = le64_to_cpu(msg->hdr.tid);
3666 u32 data_len = 0;
fe5da05e
ID		 3667 int ret;
3668 int i;
3669
3670 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3671
5aea3dcd
ID		 3672 down_read(&osdc->lock);
3673 if (!osd_registered(osd)) {
3674 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3675 goto out_unlock_osdc;
3676 }
3677 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3678
3679 mutex_lock(&osd->lock);
3680 req = lookup_request(&osd->o_requests, tid);
fe5da05e 3681 if (!req) {
5aea3dcd
ID		 3682 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3683 goto out_unlock_session;
fe5da05e 3684 }
fe5da05e 3685
cd08e0a2 3686 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
fe5da05e 3687 ret = decode_MOSDOpReply(msg, &m);
cd08e0a2 3688 m.redirect.oloc.pool_ns = NULL;
fe5da05e
ID		 3689 if (ret) {
3690 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3691 req->r_tid, ret);
3692 ceph_msg_dump(msg);
3693 goto fail_request;
3694 }
3695 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3696 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3697 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3698 le64_to_cpu(m.replay_version.version), m.user_version);
3699
3700 if (m.retry_attempt >= 0) {
3701 if (m.retry_attempt != req->r_attempts - 1) {
3702 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3703 req, req->r_tid, m.retry_attempt,
3704 req->r_attempts - 1);
5aea3dcd 3705 goto out_unlock_session;
fe5da05e
ID		 3706 }
3707 } else {
3708 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3709 }
3710
3711 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3712 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3713 m.redirect.oloc.pool);
5aea3dcd
ID		 3714 unlink_request(osd, req);
3715 mutex_unlock(&osd->lock);
205ee118 3716
30c156d9
YZ		 3717 /*
3718 * Not ceph_oloc_copy() - changing pool_ns is not
3719 * supported.
3720 */
3721 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
890bd0f8
JL		 3722 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED |
3723 CEPH_OSD_FLAG_IGNORE_OVERLAY |
3724 CEPH_OSD_FLAG_IGNORE_CACHE;
5aea3dcd
ID		 3725 req->r_tid = 0;
3726 __submit_request(req, false);
3727 goto out_unlock_osdc;
205ee118
ID		 3728 }
3729
117d96a0
ID		 3730 if (m.result == -EAGAIN) {
3731 dout("req %p tid %llu EAGAIN\n", req, req->r_tid);
3732 unlink_request(osd, req);
3733 mutex_unlock(&osd->lock);
3734
3735 /*
3736 * The object is missing on the replica or not (yet)
3737 * readable. Clear pgid to force a resend to the primary
3738 * via legacy_change.
3739 */
3740 req->r_t.pgid.pool = 0;
3741 req->r_t.pgid.seed = 0;
3742 WARN_ON(!req->r_t.used_replica);
3743 req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS |
3744 CEPH_OSD_FLAG_LOCALIZE_READS);
3745 req->r_tid = 0;
3746 __submit_request(req, false);
3747 goto out_unlock_osdc;
3748 }
3749
fe5da05e
ID		 3750 if (m.num_ops != req->r_num_ops) {
3751 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3752 req->r_num_ops, req->r_tid);
3753 goto fail_request;
f24e9980 3754 }
fe5da05e
ID		 3755 for (i = 0; i < req->r_num_ops; i++) {
3756 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3757 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3758 req->r_ops[i].rval = m.rval[i];
3759 req->r_ops[i].outdata_len = m.outdata_len[i];
3760 data_len += m.outdata_len[i];
3761 }
3762 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3763 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3764 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3765 goto fail_request;
3766 }
b18b9550
ID		 3767 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3768 req, req->r_tid, m.result, data_len);
f24e9980 3769
b18b9550
ID		 3770 /*
3771 * Since we only ever request ONDISK, we should only ever get
3772 * one (type of) reply back.
3773 */
3774 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3775 req->r_result = m.result ?: data_len;
3776 finish_request(req);
5aea3dcd
ID		 3777 mutex_unlock(&osd->lock);
3778 up_read(&osdc->lock);
f24e9980 3779
b18b9550 3780 __complete_request(req);
f24e9980
SW		 3781 return;
3782
fe5da05e 3783fail_request:
4609245e 3784 complete_request(req, -EIO);
5aea3dcd
ID		 3785out_unlock_session:
3786 mutex_unlock(&osd->lock);
3787out_unlock_osdc:
3788 up_read(&osdc->lock);
f24e9980
SW		 3789}
3790
42c1b124
ID		 3791static void set_pool_was_full(struct ceph_osd_client *osdc)
3792{
3793 struct rb_node *n;
3794
3795 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3796 struct ceph_pg_pool_info *pi =
3797 rb_entry(n, struct ceph_pg_pool_info, node);
3798
3799 pi->was_full = __pool_full(pi);
3800 }
3801}
3802
5aea3dcd 3803static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
f24e9980 3804{
5aea3dcd 3805 struct ceph_pg_pool_info *pi;
f24e9980 3806
5aea3dcd
ID		 3807 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3808 if (!pi)
3809 return false;
f24e9980 3810
5aea3dcd 3811 return pi->was_full && !__pool_full(pi);
422d2cb8
YS		 3812}
3813
922dab61
ID		 3814static enum calc_target_result
3815recalc_linger_target(struct ceph_osd_linger_request *lreq)
3816{
3817 struct ceph_osd_client *osdc = lreq->osdc;
3818 enum calc_target_result ct_res;
3819
8edf84ba 3820 ct_res = calc_target(osdc, &lreq->t, true);
922dab61
ID		 3821 if (ct_res == CALC_TARGET_NEED_RESEND) {
3822 struct ceph_osd *osd;
3823
3824 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3825 if (osd != lreq->osd) {
3826 unlink_linger(lreq->osd, lreq);
3827 link_linger(osd, lreq);
3828 }
3829 }
3830
3831 return ct_res;
3832}
3833
422d2cb8 3834/*
5aea3dcd 3835 * Requeue requests whose mapping to an OSD has changed.
422d2cb8 3836 */
5aea3dcd
ID		 3837static void scan_requests(struct ceph_osd *osd,
3838 bool force_resend,
3839 bool cleared_full,
3840 bool check_pool_cleared_full,
3841 struct rb_root *need_resend,
3842 struct list_head *need_resend_linger)
422d2cb8 3843{
5aea3dcd
ID		 3844 struct ceph_osd_client *osdc = osd->o_osdc;
3845 struct rb_node *n;
3846 bool force_resend_writes;
3847
922dab61
ID		 3848 for (n = rb_first(&osd->o_linger_requests); n; ) {
3849 struct ceph_osd_linger_request *lreq =
3850 rb_entry(n, struct ceph_osd_linger_request, node);
3851 enum calc_target_result ct_res;
3852
3853 n = rb_next(n); /* recalc_linger_target() */
3854
3855 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3856 lreq->linger_id);
3857 ct_res = recalc_linger_target(lreq);
3858 switch (ct_res) {
3859 case CALC_TARGET_NO_ACTION:
3860 force_resend_writes = cleared_full ||
3861 (check_pool_cleared_full &&
3862 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3863 if (!force_resend && !force_resend_writes)
3864 break;
3865
3866 /* fall through */
3867 case CALC_TARGET_NEED_RESEND:
4609245e 3868 cancel_linger_map_check(lreq);
922dab61
ID		 3869 /*
3870 * scan_requests() for the previous epoch(s)
3871 * may have already added it to the list, since
3872 * it's not unlinked here.
3873 */
3874 if (list_empty(&lreq->scan_item))
3875 list_add_tail(&lreq->scan_item, need_resend_linger);
3876 break;
3877 case CALC_TARGET_POOL_DNE:
a10bcb19 3878 list_del_init(&lreq->scan_item);
4609245e 3879 check_linger_pool_dne(lreq);
922dab61
ID		 3880 break;
3881 }
3882 }
3883
5aea3dcd
ID		 3884 for (n = rb_first(&osd->o_requests); n; ) {
3885 struct ceph_osd_request *req =
3886 rb_entry(n, struct ceph_osd_request, r_node);
3887 enum calc_target_result ct_res;
3888
4609245e 3889 n = rb_next(n); /* unlink_request(), check_pool_dne() */
5aea3dcd
ID		 3890
3891 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
8edf84ba 3892 ct_res = calc_target(osdc, &req->r_t, false);
5aea3dcd
ID		 3893 switch (ct_res) {
3894 case CALC_TARGET_NO_ACTION:
3895 force_resend_writes = cleared_full ||
3896 (check_pool_cleared_full &&
3897 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3898 if (!force_resend &&
3899 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3900 !force_resend_writes))
3901 break;
3902
3903 /* fall through */
3904 case CALC_TARGET_NEED_RESEND:
4609245e 3905 cancel_map_check(req);
5aea3dcd
ID		 3906 unlink_request(osd, req);
3907 insert_request(need_resend, req);
3908 break;
3909 case CALC_TARGET_POOL_DNE:
4609245e 3910 check_pool_dne(req);
5aea3dcd 3911 break;
b0494532 3912 }
6f6c7006 3913 }
422d2cb8 3914}
6f6c7006 3915
42c1b124 3916static int handle_one_map(struct ceph_osd_client *osdc,
5aea3dcd
ID		 3917 void *p, void *end, bool incremental,
3918 struct rb_root *need_resend,
3919 struct list_head *need_resend_linger)
42c1b124
ID		 3920{
3921 struct ceph_osdmap *newmap;
3922 struct rb_node *n;
3923 bool skipped_map = false;
3924 bool was_full;
3925
b7ec35b3 3926 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
42c1b124
ID		 3927 set_pool_was_full(osdc);
3928
3929 if (incremental)
3930 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3931 else
3932 newmap = ceph_osdmap_decode(&p, end);
3933 if (IS_ERR(newmap))
3934 return PTR_ERR(newmap);
3935
3936 if (newmap != osdc->osdmap) {
3937 /*
3938 * Preserve ->was_full before destroying the old map.
3939 * For pools that weren't in the old map, ->was_full
3940 * should be false.
3941 */
3942 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3943 struct ceph_pg_pool_info *pi =
3944 rb_entry(n, struct ceph_pg_pool_info, node);
3945 struct ceph_pg_pool_info *old_pi;
3946
3947 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3948 if (old_pi)
3949 pi->was_full = old_pi->was_full;
3950 else
3951 WARN_ON(pi->was_full);
3952 }
3953
3954 if (osdc->osdmap->epoch &&
3955 osdc->osdmap->epoch + 1 < newmap->epoch) {
3956 WARN_ON(incremental);
3957 skipped_map = true;
3958 }
3959
3960 ceph_osdmap_destroy(osdc->osdmap);
3961 osdc->osdmap = newmap;
3962 }
3963
b7ec35b3 3964 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
5aea3dcd
ID		 3965 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3966 need_resend, need_resend_linger);
3967
3968 for (n = rb_first(&osdc->osds); n; ) {
3969 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3970
3971 n = rb_next(n); /* close_osd() */
3972
3973 scan_requests(osd, skipped_map, was_full, true, need_resend,
3974 need_resend_linger);
3975 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3976 memcmp(&osd->o_con.peer_addr,
3977 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3978 sizeof(struct ceph_entity_addr)))
3979 close_osd(osd);
3980 }
42c1b124
ID		 3981
3982 return 0;
3983}
6f6c7006 3984
5aea3dcd
ID		 3985static void kick_requests(struct ceph_osd_client *osdc,
3986 struct rb_root *need_resend,
3987 struct list_head *need_resend_linger)
3988{
922dab61 3989 struct ceph_osd_linger_request *lreq, *nlreq;
04c7d789 3990 enum calc_target_result ct_res;
5aea3dcd
ID		 3991 struct rb_node *n;
3992
04c7d789
ID		 3993 /* make sure need_resend targets reflect latest map */
3994 for (n = rb_first(need_resend); n; ) {
3995 struct ceph_osd_request *req =
3996 rb_entry(n, struct ceph_osd_request, r_node);
3997
3998 n = rb_next(n);
3999
4000 if (req->r_t.epoch < osdc->osdmap->epoch) {
8edf84ba 4001 ct_res = calc_target(osdc, &req->r_t, false);
04c7d789
ID		 4002 if (ct_res == CALC_TARGET_POOL_DNE) {
4003 erase_request(need_resend, req);
4004 check_pool_dne(req);
4005 }
4006 }
4007 }
4008
5aea3dcd
ID		 4009 for (n = rb_first(need_resend); n; ) {
4010 struct ceph_osd_request *req =
4011 rb_entry(n, struct ceph_osd_request, r_node);
4012 struct ceph_osd *osd;
4013
4014 n = rb_next(n);
4015 erase_request(need_resend, req); /* before link_request() */
4016
5aea3dcd
ID		 4017 osd = lookup_create_osd(osdc, req->r_t.osd, true);
4018 link_request(osd, req);
4019 if (!req->r_linger) {
4020 if (!osd_homeless(osd) && !req->r_t.paused)
4021 send_request(req);
922dab61
ID		 4022 } else {
4023 cancel_linger_request(req);
5aea3dcd
ID		 4024 }
4025 }
922dab61
ID		 4026
4027 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
4028 if (!osd_homeless(lreq->osd))
4029 send_linger(lreq);
4030
4031 list_del_init(&lreq->scan_item);
4032 }
5aea3dcd
ID		 4033}
4034
f24e9980
SW		 4035/*
4036 * Process updated osd map.
4037 *
4038 * The message contains any number of incremental and full maps, normally
4039 * indicating some sort of topology change in the cluster. Kick requests
4040 * off to different OSDs as needed.
4041 */
4042void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
4043{
42c1b124
ID		 4044 void *p = msg->front.iov_base;
4045 void *const end = p + msg->front.iov_len;
f24e9980
SW		 4046 u32 nr_maps, maplen;
4047 u32 epoch;
f24e9980 4048 struct ceph_fsid fsid;
5aea3dcd
ID		 4049 struct rb_root need_resend = RB_ROOT;
4050 LIST_HEAD(need_resend_linger);
42c1b124
ID		 4051 bool handled_incremental = false;
4052 bool was_pauserd, was_pausewr;
4053 bool pauserd, pausewr;
4054 int err;
f24e9980 4055
42c1b124 4056 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
5aea3dcd 4057 down_write(&osdc->lock);
f24e9980
SW		 4058
4059 /* verify fsid */
4060 ceph_decode_need(&p, end, sizeof(fsid), bad);
4061 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 4062 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 4063 goto bad;
f24e9980 4064
b7ec35b3
ID		 4065 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4066 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4067 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 4068 have_pool_full(osdc);
9a1ea2db 4069
f24e9980
SW		 4070 /* incremental maps */
4071 ceph_decode_32_safe(&p, end, nr_maps, bad);
4072 dout(" %d inc maps\n", nr_maps);
4073 while (nr_maps > 0) {
4074 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 4075 epoch = ceph_decode_32(&p);
4076 maplen = ceph_decode_32(&p);
f24e9980 4077 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 4078 if (osdc->osdmap->epoch &&
4079 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 4080 dout("applying incremental map %u len %d\n",
4081 epoch, maplen);
5aea3dcd
ID		 4082 err = handle_one_map(osdc, p, p + maplen, true,
4083 &need_resend, &need_resend_linger);
42c1b124 4084 if (err)
f24e9980 4085 goto bad;
42c1b124 4086 handled_incremental = true;
f24e9980
SW		 4087 } else {
4088 dout("ignoring incremental map %u len %d\n",
4089 epoch, maplen);
4090 }
42c1b124 4091 p += maplen;
f24e9980
SW		 4092 nr_maps--;
4093 }
42c1b124 4094 if (handled_incremental)
f24e9980
SW		 4095 goto done;
4096
4097 /* full maps */
4098 ceph_decode_32_safe(&p, end, nr_maps, bad);
4099 dout(" %d full maps\n", nr_maps);
4100 while (nr_maps) {
4101 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 4102 epoch = ceph_decode_32(&p);
4103 maplen = ceph_decode_32(&p);
f24e9980
SW		 4104 ceph_decode_need(&p, end, maplen, bad);
4105 if (nr_maps > 1) {
4106 dout("skipping non-latest full map %u len %d\n",
4107 epoch, maplen);
e5253a7b 4108 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 4109 dout("skipping full map %u len %d, "
4110 "older than our %u\n", epoch, maplen,
4111 osdc->osdmap->epoch);
4112 } else {
4113 dout("taking full map %u len %d\n", epoch, maplen);
5aea3dcd
ID		 4114 err = handle_one_map(osdc, p, p + maplen, false,
4115 &need_resend, &need_resend_linger);
42c1b124 4116 if (err)
f24e9980 4117 goto bad;
f24e9980
SW		 4118 }
4119 p += maplen;
4120 nr_maps--;
4121 }
4122
4123done:
cd634fb6
SW		 4124 /*
4125 * subscribe to subsequent osdmap updates if full to ensure
4126 * we find out when we are no longer full and stop returning
4127 * ENOSPC.
4128 */
b7ec35b3
ID		 4129 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4130 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4131 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 4132 have_pool_full(osdc);
58eb7932
JL		 4133 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4134 osdc->osdmap->epoch < osdc->epoch_barrier)
42c1b124 4135 maybe_request_map(osdc);
cd634fb6 4136
5aea3dcd 4137 kick_requests(osdc, &need_resend, &need_resend_linger);
42c1b124 4138
fc36d0a4 4139 ceph_osdc_abort_on_full(osdc);
42c1b124
ID		 4140 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4141 osdc->osdmap->epoch);
5aea3dcd 4142 up_write(&osdc->lock);
03066f23 4143 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 4144 return;
4145
4146bad:
4147 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 4148 ceph_msg_dump(msg);
5aea3dcd
ID		 4149 up_write(&osdc->lock);
4150}
4151
4152/*
4153 * Resubmit requests pending on the given osd.
4154 */
4155static void kick_osd_requests(struct ceph_osd *osd)
4156{
4157 struct rb_node *n;
4158
a02a946d
ID		 4159 clear_backoffs(osd);
4160
922dab61 4161 for (n = rb_first(&osd->o_requests); n; ) {
5aea3dcd
ID		 4162 struct ceph_osd_request *req =
4163 rb_entry(n, struct ceph_osd_request, r_node);
4164
922dab61
ID		 4165 n = rb_next(n); /* cancel_linger_request() */
4166
5aea3dcd
ID		 4167 if (!req->r_linger) {
4168 if (!req->r_t.paused)
4169 send_request(req);
922dab61
ID		 4170 } else {
4171 cancel_linger_request(req);
5aea3dcd
ID		 4172 }
4173 }
922dab61
ID		 4174 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4175 struct ceph_osd_linger_request *lreq =
4176 rb_entry(n, struct ceph_osd_linger_request, node);
4177
4178 send_linger(lreq);
4179 }
5aea3dcd
ID		 4180}
4181
4182/*
4183 * If the osd connection drops, we need to resubmit all requests.
4184 */
4185static void osd_fault(struct ceph_connection *con)
4186{
4187 struct ceph_osd *osd = con->private;
4188 struct ceph_osd_client *osdc = osd->o_osdc;
4189
4190 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4191
4192 down_write(&osdc->lock);
4193 if (!osd_registered(osd)) {
4194 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4195 goto out_unlock;
4196 }
4197
4198 if (!reopen_osd(osd))
4199 kick_osd_requests(osd);
4200 maybe_request_map(osdc);
4201
4202out_unlock:
4203 up_write(&osdc->lock);
f24e9980
SW		 4204}
4205
a02a946d
ID		 4206struct MOSDBackoff {
4207 struct ceph_spg spgid;
4208 u32 map_epoch;
4209 u8 op;
4210 u64 id;
4211 struct ceph_hobject_id *begin;
4212 struct ceph_hobject_id *end;
4213};
4214
4215static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4216{
4217 void *p = msg->front.iov_base;
4218 void *const end = p + msg->front.iov_len;
4219 u8 struct_v;
4220 u32 struct_len;
4221 int ret;
4222
4223 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4224 if (ret)
4225 return ret;
4226
4227 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4228 if (ret)
4229 return ret;
4230
4231 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4232 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4233 ceph_decode_8_safe(&p, end, m->op, e_inval);
4234 ceph_decode_64_safe(&p, end, m->id, e_inval);
4235
4236 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4237 if (!m->begin)
4238 return -ENOMEM;
4239
4240 ret = decode_hoid(&p, end, m->begin);
4241 if (ret) {
4242 free_hoid(m->begin);
4243 return ret;
4244 }
4245
4246 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4247 if (!m->end) {
4248 free_hoid(m->begin);
4249 return -ENOMEM;
4250 }
4251
4252 ret = decode_hoid(&p, end, m->end);
4253 if (ret) {
4254 free_hoid(m->begin);
4255 free_hoid(m->end);
4256 return ret;
4257 }
4258
4259 return 0;
4260
4261e_inval:
4262 return -EINVAL;
4263}
4264
4265static struct ceph_msg *create_backoff_message(
4266 const struct ceph_osd_backoff *backoff,
4267 u32 map_epoch)
4268{
4269 struct ceph_msg *msg;
4270 void *p, *end;
4271 int msg_size;
4272
4273 msg_size = CEPH_ENCODING_START_BLK_LEN +
4274 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4275 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4276 msg_size += CEPH_ENCODING_START_BLK_LEN +
4277 hoid_encoding_size(backoff->begin);
4278 msg_size += CEPH_ENCODING_START_BLK_LEN +
4279 hoid_encoding_size(backoff->end);
4280
4281 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4282 if (!msg)
4283 return NULL;
4284
4285 p = msg->front.iov_base;
4286 end = p + msg->front_alloc_len;
4287
4288 encode_spgid(&p, &backoff->spgid);
4289 ceph_encode_32(&p, map_epoch);
4290 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4291 ceph_encode_64(&p, backoff->id);
4292 encode_hoid(&p, end, backoff->begin);
4293 encode_hoid(&p, end, backoff->end);
4294 BUG_ON(p != end);
4295
4296 msg->front.iov_len = p - msg->front.iov_base;
4297 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4298 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4299
4300 return msg;
4301}
4302
4303static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4304{
4305 struct ceph_spg_mapping *spg;
4306 struct ceph_osd_backoff *backoff;
4307 struct ceph_msg *msg;
4308
4309 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4310 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4311
4312 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4313 if (!spg) {
4314 spg = alloc_spg_mapping();
4315 if (!spg) {
4316 pr_err("%s failed to allocate spg\n", __func__);
4317 return;
4318 }
4319 spg->spgid = m->spgid; /* struct */
4320 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4321 }
4322
4323 backoff = alloc_backoff();
4324 if (!backoff) {
4325 pr_err("%s failed to allocate backoff\n", __func__);
4326 return;
4327 }
4328 backoff->spgid = m->spgid; /* struct */
4329 backoff->id = m->id;
4330 backoff->begin = m->begin;
4331 m->begin = NULL; /* backoff now owns this */
4332 backoff->end = m->end;
4333 m->end = NULL; /* ditto */
4334
4335 insert_backoff(&spg->backoffs, backoff);
4336 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4337
4338 /*
4339 * Ack with original backoff's epoch so that the OSD can
4340 * discard this if there was a PG split.
4341 */
4342 msg = create_backoff_message(backoff, m->map_epoch);
4343 if (!msg) {
4344 pr_err("%s failed to allocate msg\n", __func__);
4345 return;
4346 }
4347 ceph_con_send(&osd->o_con, msg);
4348}
4349
4350static bool target_contained_by(const struct ceph_osd_request_target *t,
4351 const struct ceph_hobject_id *begin,
4352 const struct ceph_hobject_id *end)
4353{
4354 struct ceph_hobject_id hoid;
4355 int cmp;
4356
4357 hoid_fill_from_target(&hoid, t);
4358 cmp = hoid_compare(&hoid, begin);
4359 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4360}
4361
4362static void handle_backoff_unblock(struct ceph_osd *osd,
4363 const struct MOSDBackoff *m)
4364{
4365 struct ceph_spg_mapping *spg;
4366 struct ceph_osd_backoff *backoff;
4367 struct rb_node *n;
4368
4369 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4370 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4371
4372 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4373 if (!backoff) {
4374 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4375 __func__, osd->o_osd, m->spgid.pgid.pool,
4376 m->spgid.pgid.seed, m->spgid.shard, m->id);
4377 return;
4378 }
4379
4380 if (hoid_compare(backoff->begin, m->begin) &&
4381 hoid_compare(backoff->end, m->end)) {
4382 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4383 __func__, osd->o_osd, m->spgid.pgid.pool,
4384 m->spgid.pgid.seed, m->spgid.shard, m->id);
4385 /* unblock it anyway... */
4386 }
4387
4388 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4389 BUG_ON(!spg);
4390
4391 erase_backoff(&spg->backoffs, backoff);
4392 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4393 free_backoff(backoff);
4394
4395 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4396 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4397 free_spg_mapping(spg);
4398 }
4399
4400 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4401 struct ceph_osd_request *req =
4402 rb_entry(n, struct ceph_osd_request, r_node);
4403
4404 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4405 /*
4406 * Match against @m, not @backoff -- the PG may
4407 * have split on the OSD.
4408 */
4409 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4410 /*
4411 * If no other installed backoff applies,
4412 * resend.
4413 */
4414 send_request(req);
4415 }
4416 }
4417 }
4418}
4419
4420static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4421{
4422 struct ceph_osd_client *osdc = osd->o_osdc;
4423 struct MOSDBackoff m;
4424 int ret;
4425
4426 down_read(&osdc->lock);
4427 if (!osd_registered(osd)) {
4428 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4429 up_read(&osdc->lock);
4430 return;
4431 }
4432 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4433
4434 mutex_lock(&osd->lock);
4435 ret = decode_MOSDBackoff(msg, &m);
4436 if (ret) {
4437 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4438 ceph_msg_dump(msg);
4439 goto out_unlock;
4440 }
4441
4442 switch (m.op) {
4443 case CEPH_OSD_BACKOFF_OP_BLOCK:
4444 handle_backoff_block(osd, &m);
4445 break;
4446 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4447 handle_backoff_unblock(osd, &m);
4448 break;
4449 default:
4450 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4451 }
4452
4453 free_hoid(m.begin);
4454 free_hoid(m.end);
4455
4456out_unlock:
4457 mutex_unlock(&osd->lock);
4458 up_read(&osdc->lock);
4459}
4460
a40c4f10
YS		 4461/*
4462 * Process osd watch notifications
4463 */
3c663bbd
AE		 4464static void handle_watch_notify(struct ceph_osd_client *osdc,
4465 struct ceph_msg *msg)
a40c4f10 4466{
922dab61
ID		 4467 void *p = msg->front.iov_base;
4468 void *const end = p + msg->front.iov_len;
4469 struct ceph_osd_linger_request *lreq;
4470 struct linger_work *lwork;
4471 u8 proto_ver, opcode;
4472 u64 cookie, notify_id;
4473 u64 notifier_id = 0;
19079203 4474 s32 return_code = 0;
922dab61
ID		 4475 void *payload = NULL;
4476 u32 payload_len = 0;
a40c4f10
YS		 4477
4478 ceph_decode_8_safe(&p, end, proto_ver, bad);
4479 ceph_decode_8_safe(&p, end, opcode, bad);
4480 ceph_decode_64_safe(&p, end, cookie, bad);
922dab61 4481 p += 8; /* skip ver */
a40c4f10
YS		 4482 ceph_decode_64_safe(&p, end, notify_id, bad);
4483
922dab61
ID		 4484 if (proto_ver >= 1) {
4485 ceph_decode_32_safe(&p, end, payload_len, bad);
4486 ceph_decode_need(&p, end, payload_len, bad);
4487 payload = p;
4488 p += payload_len;
4489 }
4490
4491 if (le16_to_cpu(msg->hdr.version) >= 2)
19079203 4492 ceph_decode_32_safe(&p, end, return_code, bad);
922dab61
ID		 4493
4494 if (le16_to_cpu(msg->hdr.version) >= 3)
4495 ceph_decode_64_safe(&p, end, notifier_id, bad);
4496
4497 down_read(&osdc->lock);
4498 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4499 if (!lreq) {
4500 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4501 cookie);
4502 goto out_unlock_osdc;
4503 }
4504
4505 mutex_lock(&lreq->lock);
19079203
ID		 4506 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4507 opcode, cookie, lreq, lreq->is_watch);
922dab61
ID		 4508 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4509 if (!lreq->last_error) {
4510 lreq->last_error = -ENOTCONN;
4511 queue_watch_error(lreq);
4512 }
19079203
ID		 4513 } else if (!lreq->is_watch) {
4514 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4515 if (lreq->notify_id && lreq->notify_id != notify_id) {
4516 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4517 lreq->notify_id, notify_id);
4518 } else if (!completion_done(&lreq->notify_finish_wait)) {
4519 struct ceph_msg_data *data =
0d9c1ab3 4520 msg->num_data_items ? &msg->data[0] : NULL;
19079203
ID		 4521
4522 if (data) {
4523 if (lreq->preply_pages) {
4524 WARN_ON(data->type !=
4525 CEPH_MSG_DATA_PAGES);
4526 *lreq->preply_pages = data->pages;
4527 *lreq->preply_len = data->length;
e8862740 4528 data->own_pages = false;
19079203
ID		 4529 }
4530 }
4531 lreq->notify_finish_error = return_code;
4532 complete_all(&lreq->notify_finish_wait);
4533 }
922dab61
ID		 4534 } else {
4535 /* CEPH_WATCH_EVENT_NOTIFY */
4536 lwork = lwork_alloc(lreq, do_watch_notify);
4537 if (!lwork) {
4538 pr_err("failed to allocate notify-lwork\n");
4539 goto out_unlock_lreq;
a40c4f10 4540 }
a40c4f10 4541
922dab61
ID		 4542 lwork->notify.notify_id = notify_id;
4543 lwork->notify.notifier_id = notifier_id;
4544 lwork->notify.payload = payload;
4545 lwork->notify.payload_len = payload_len;
4546 lwork->notify.msg = ceph_msg_get(msg);
4547 lwork_queue(lwork);
91883cd2 4548 }
a40c4f10 4549
922dab61
ID		 4550out_unlock_lreq:
4551 mutex_unlock(&lreq->lock);
4552out_unlock_osdc:
4553 up_read(&osdc->lock);
a40c4f10
YS		 4554 return;
4555
4556bad:
4557 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 4558}
4559
70636773
AE		 4560/*
4561 * Register request, send initial attempt.
4562 */
4563int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4564 struct ceph_osd_request *req,
4565 bool nofail)
4566{
5aea3dcd
ID		 4567 down_read(&osdc->lock);
4568 submit_request(req, false);
4569 up_read(&osdc->lock);
0bbfdfe8 4570
5aea3dcd 4571 return 0;
f24e9980 4572}
3d14c5d2 4573EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 4574
c9f9b93d 4575/*
c297eb42
ID		 4576 * Unregister a registered request. The request is not completed:
4577 * ->r_result isn't set and __complete_request() isn't called.
c9f9b93d
ID		 4578 */
4579void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4580{
4581 struct ceph_osd_client *osdc = req->r_osdc;
4582
5aea3dcd 4583 down_write(&osdc->lock);
5aea3dcd
ID		 4584 if (req->r_osd)
4585 cancel_request(req);
4586 up_write(&osdc->lock);
c9f9b93d
ID		 4587}
4588EXPORT_SYMBOL(ceph_osdc_cancel_request);
4589
f24e9980 4590/*
42b06965 4591 * @timeout: in jiffies, 0 means "wait forever"
f24e9980 4592 */
42b06965
ID		 4593static int wait_request_timeout(struct ceph_osd_request *req,
4594 unsigned long timeout)
f24e9980 4595{
42b06965 4596 long left;
c9f9b93d 4597
42b06965 4598 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
0e76abf2 4599 left = wait_for_completion_killable_timeout(&req->r_completion,
42b06965
ID		 4600 ceph_timeout_jiffies(timeout));
4601 if (left <= 0) {
4602 left = left ?: -ETIMEDOUT;
c9f9b93d 4603 ceph_osdc_cancel_request(req);
42b06965
ID		 4604 } else {
4605 left = req->r_result; /* completed */
f24e9980
SW		 4606 }
4607
42b06965
ID		 4608 return left;
4609}
4610
4611/*
4612 * wait for a request to complete
4613 */
4614int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4615 struct ceph_osd_request *req)
4616{
4617 return wait_request_timeout(req, 0);
f24e9980 4618}
3d14c5d2 4619EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 4620
4621/*
4622 * sync - wait for all in-flight requests to flush. avoid starvation.
4623 */
4624void ceph_osdc_sync(struct ceph_osd_client *osdc)
4625{
5aea3dcd
ID		 4626 struct rb_node *n, *p;
4627 u64 last_tid = atomic64_read(&osdc->last_tid);
f24e9980 4628
5aea3dcd
ID		 4629again:
4630 down_read(&osdc->lock);
4631 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4632 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4633
4634 mutex_lock(&osd->lock);
4635 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4636 struct ceph_osd_request *req =
4637 rb_entry(p, struct ceph_osd_request, r_node);
4638
4639 if (req->r_tid > last_tid)
4640 break;
4641
4642 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4643 continue;
f24e9980 4644
5aea3dcd
ID		 4645 ceph_osdc_get_request(req);
4646 mutex_unlock(&osd->lock);
4647 up_read(&osdc->lock);
4648 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4649 __func__, req, req->r_tid, last_tid);
b18b9550 4650 wait_for_completion(&req->r_completion);
5aea3dcd
ID		 4651 ceph_osdc_put_request(req);
4652 goto again;
4653 }
f24e9980 4654
5aea3dcd 4655 mutex_unlock(&osd->lock);
f24e9980 4656 }
5aea3dcd
ID		 4657
4658 up_read(&osdc->lock);
4659 dout("%s done last_tid %llu\n", __func__, last_tid);
f24e9980 4660}
3d14c5d2 4661EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 4662
922dab61
ID		 4663static struct ceph_osd_request *
4664alloc_linger_request(struct ceph_osd_linger_request *lreq)
4665{
4666 struct ceph_osd_request *req;
4667
4668 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4669 if (!req)
4670 return NULL;
4671
4672 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4673 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
922dab61
ID		 4674 return req;
4675}
4676
39e58c34
ID		 4677static struct ceph_osd_request *
4678alloc_watch_request(struct ceph_osd_linger_request *lreq, u8 watch_opcode)
4679{
4680 struct ceph_osd_request *req;
4681
4682 req = alloc_linger_request(lreq);
4683 if (!req)
4684 return NULL;
4685
4686 /*
4687 * Pass 0 for cookie because we don't know it yet, it will be
4688 * filled in by linger_submit().
4689 */
4690 osd_req_op_watch_init(req, 0, 0, watch_opcode);
26f887e0
ID		 4691
4692 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4693 ceph_osdc_put_request(req);
4694 return NULL;
4695 }
4696
39e58c34
ID		 4697 return req;
4698}
4699
922dab61
ID		 4700/*
4701 * Returns a handle, caller owns a ref.
4702 */
4703struct ceph_osd_linger_request *
4704ceph_osdc_watch(struct ceph_osd_client *osdc,
4705 struct ceph_object_id *oid,
4706 struct ceph_object_locator *oloc,
4707 rados_watchcb2_t wcb,
4708 rados_watcherrcb_t errcb,
4709 void *data)
4710{
4711 struct ceph_osd_linger_request *lreq;
4712 int ret;
4713
4714 lreq = linger_alloc(osdc);
4715 if (!lreq)
4716 return ERR_PTR(-ENOMEM);
4717
19079203 4718 lreq->is_watch = true;
922dab61
ID		 4719 lreq->wcb = wcb;
4720 lreq->errcb = errcb;
4721 lreq->data = data;
b07d3c4b 4722 lreq->watch_valid_thru = jiffies;
922dab61
ID		 4723
4724 ceph_oid_copy(&lreq->t.base_oid, oid);
4725 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
54ea0046 4726 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
fac02ddf 4727 ktime_get_real_ts64(&lreq->mtime);
922dab61 4728
39e58c34 4729 lreq->reg_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 4730 if (!lreq->reg_req) {
4731 ret = -ENOMEM;
4732 goto err_put_lreq;
4733 }
4734
39e58c34 4735 lreq->ping_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_PING);
922dab61
ID		 4736 if (!lreq->ping_req) {
4737 ret = -ENOMEM;
4738 goto err_put_lreq;
4739 }
4740
81c65213 4741 linger_submit(lreq);
922dab61
ID		 4742 ret = linger_reg_commit_wait(lreq);
4743 if (ret) {
4744 linger_cancel(lreq);
4745 goto err_put_lreq;
4746 }
4747
4748 return lreq;
4749
4750err_put_lreq:
4751 linger_put(lreq);
4752 return ERR_PTR(ret);
4753}
4754EXPORT_SYMBOL(ceph_osdc_watch);
4755
4756/*
4757 * Releases a ref.
4758 *
4759 * Times out after mount_timeout to preserve rbd unmap behaviour
4760 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4761 * with mount_timeout").
4762 */
4763int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4764 struct ceph_osd_linger_request *lreq)
4765{
4766 struct ceph_options *opts = osdc->client->options;
4767 struct ceph_osd_request *req;
4768 int ret;
4769
4770 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4771 if (!req)
4772 return -ENOMEM;
4773
4774 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4775 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
54ea0046 4776 req->r_flags = CEPH_OSD_FLAG_WRITE;
fac02ddf 4777 ktime_get_real_ts64(&req->r_mtime);
922dab61
ID		 4778 osd_req_op_watch_init(req, 0, lreq->linger_id,
4779 CEPH_OSD_WATCH_OP_UNWATCH);
4780
4781 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4782 if (ret)
4783 goto out_put_req;
4784
4785 ceph_osdc_start_request(osdc, req, false);
4786 linger_cancel(lreq);
4787 linger_put(lreq);
4788 ret = wait_request_timeout(req, opts->mount_timeout);
4789
4790out_put_req:
4791 ceph_osdc_put_request(req);
4792 return ret;
4793}
4794EXPORT_SYMBOL(ceph_osdc_unwatch);
4795
4796static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4797 u64 notify_id, u64 cookie, void *payload,
6d54228f 4798 u32 payload_len)
922dab61
ID		 4799{
4800 struct ceph_osd_req_op *op;
4801 struct ceph_pagelist *pl;
4802 int ret;
4803
4804 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4805
33165d47 4806 pl = ceph_pagelist_alloc(GFP_NOIO);
922dab61
ID		 4807 if (!pl)
4808 return -ENOMEM;
4809
922dab61
ID		 4810 ret = ceph_pagelist_encode_64(pl, notify_id);
4811 ret |= ceph_pagelist_encode_64(pl, cookie);
4812 if (payload) {
4813 ret |= ceph_pagelist_encode_32(pl, payload_len);
4814 ret |= ceph_pagelist_append(pl, payload, payload_len);
4815 } else {
4816 ret |= ceph_pagelist_encode_32(pl, 0);
4817 }
4818 if (ret) {
4819 ceph_pagelist_release(pl);
4820 return -ENOMEM;
4821 }
4822
4823 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4824 op->indata_len = pl->length;
4825 return 0;
4826}
4827
4828int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4829 struct ceph_object_id *oid,
4830 struct ceph_object_locator *oloc,
4831 u64 notify_id,
4832 u64 cookie,
4833 void *payload,
6d54228f 4834 u32 payload_len)
922dab61
ID		 4835{
4836 struct ceph_osd_request *req;
4837 int ret;
4838
4839 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4840 if (!req)
4841 return -ENOMEM;
4842
4843 ceph_oid_copy(&req->r_base_oid, oid);
4844 ceph_oloc_copy(&req->r_base_oloc, oloc);
4845 req->r_flags = CEPH_OSD_FLAG_READ;
4846
26f887e0
ID		 4847 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4848 payload_len);
922dab61
ID		 4849 if (ret)
4850 goto out_put_req;
4851
26f887e0 4852 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
922dab61
ID		 4853 if (ret)
4854 goto out_put_req;
4855
4856 ceph_osdc_start_request(osdc, req, false);
4857 ret = ceph_osdc_wait_request(osdc, req);
4858
4859out_put_req:
4860 ceph_osdc_put_request(req);
4861 return ret;
4862}
4863EXPORT_SYMBOL(ceph_osdc_notify_ack);
4864
19079203
ID		 4865static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4866 u64 cookie, u32 prot_ver, u32 timeout,
6d54228f 4867 void *payload, u32 payload_len)
19079203
ID		 4868{
4869 struct ceph_osd_req_op *op;
4870 struct ceph_pagelist *pl;
4871 int ret;
4872
4873 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4874 op->notify.cookie = cookie;
4875
33165d47 4876 pl = ceph_pagelist_alloc(GFP_NOIO);
19079203
ID		 4877 if (!pl)
4878 return -ENOMEM;
4879
19079203
ID		 4880 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4881 ret |= ceph_pagelist_encode_32(pl, timeout);
4882 ret |= ceph_pagelist_encode_32(pl, payload_len);
4883 ret |= ceph_pagelist_append(pl, payload, payload_len);
4884 if (ret) {
4885 ceph_pagelist_release(pl);
4886 return -ENOMEM;
4887 }
4888
4889 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4890 op->indata_len = pl->length;
4891 return 0;
4892}
4893
4894/*
4895 * @timeout: in seconds
4896 *
4897 * @preply_{pages,len} are initialized both on success and error.
4898 * The caller is responsible for:
4899 *
4900 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4901 */
4902int ceph_osdc_notify(struct ceph_osd_client *osdc,
4903 struct ceph_object_id *oid,
4904 struct ceph_object_locator *oloc,
4905 void *payload,
6d54228f 4906 u32 payload_len,
19079203
ID		 4907 u32 timeout,
4908 struct page ***preply_pages,
4909 size_t *preply_len)
4910{
4911 struct ceph_osd_linger_request *lreq;
4912 struct page **pages;
4913 int ret;
4914
4915 WARN_ON(!timeout);
4916 if (preply_pages) {
4917 *preply_pages = NULL;
4918 *preply_len = 0;
4919 }
4920
4921 lreq = linger_alloc(osdc);
4922 if (!lreq)
4923 return -ENOMEM;
4924
4925 lreq->preply_pages = preply_pages;
4926 lreq->preply_len = preply_len;
4927
4928 ceph_oid_copy(&lreq->t.base_oid, oid);
4929 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4930 lreq->t.flags = CEPH_OSD_FLAG_READ;
4931
4932 lreq->reg_req = alloc_linger_request(lreq);
4933 if (!lreq->reg_req) {
4934 ret = -ENOMEM;
4935 goto out_put_lreq;
4936 }
4937
81c65213
ID		 4938 /*
4939 * Pass 0 for cookie because we don't know it yet, it will be
4940 * filled in by linger_submit().
4941 */
4942 ret = osd_req_op_notify_init(lreq->reg_req, 0, 0, 1, timeout,
4943 payload, payload_len);
4944 if (ret)
4945 goto out_put_lreq;
4946
19079203
ID		 4947 /* for notify_id */
4948 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4949 if (IS_ERR(pages)) {
4950 ret = PTR_ERR(pages);
4951 goto out_put_lreq;
4952 }
19079203
ID		 4953 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4954 response_data),
4955 pages, PAGE_SIZE, 0, false, true);
19079203 4956
26f887e0
ID		 4957 ret = ceph_osdc_alloc_messages(lreq->reg_req, GFP_NOIO);
4958 if (ret)
4959 goto out_put_lreq;
4960
81c65213 4961 linger_submit(lreq);
19079203
ID		 4962 ret = linger_reg_commit_wait(lreq);
4963 if (!ret)
4964 ret = linger_notify_finish_wait(lreq);
4965 else
4966 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4967
4968 linger_cancel(lreq);
4969out_put_lreq:
4970 linger_put(lreq);
4971 return ret;
4972}
4973EXPORT_SYMBOL(ceph_osdc_notify);
4974
b07d3c4b
ID		 4975/*
4976 * Return the number of milliseconds since the watch was last
4977 * confirmed, or an error. If there is an error, the watch is no
4978 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4979 */
4980int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4981 struct ceph_osd_linger_request *lreq)
4982{
4983 unsigned long stamp, age;
4984 int ret;
4985
4986 down_read(&osdc->lock);
4987 mutex_lock(&lreq->lock);
4988 stamp = lreq->watch_valid_thru;
4989 if (!list_empty(&lreq->pending_lworks)) {
4990 struct linger_work *lwork =
4991 list_first_entry(&lreq->pending_lworks,
4992 struct linger_work,
4993 pending_item);
4994
4995 if (time_before(lwork->queued_stamp, stamp))
4996 stamp = lwork->queued_stamp;
4997 }
4998 age = jiffies - stamp;
4999 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
5000 lreq, lreq->linger_id, age, lreq->last_error);
5001 /* we are truncating to msecs, so return a safe upper bound */
5002 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
5003
5004 mutex_unlock(&lreq->lock);
5005 up_read(&osdc->lock);
5006 return ret;
5007}
5008
a4ed38d7
DF		 5009static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
5010{
5011 u8 struct_v;
5012 u32 struct_len;
5013 int ret;
5014
5015 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
5016 &struct_v, &struct_len);
5017 if (ret)
51fc7ab4
JL		 5018 goto bad;
5019
5020 ret = -EINVAL;
5021 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
5022 ceph_decode_64_safe(p, end, item->cookie, bad);
5023 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
a4ed38d7 5024
a4ed38d7 5025 if (struct_v >= 2) {
51fc7ab4
JL		 5026 ret = ceph_decode_entity_addr(p, end, &item->addr);
5027 if (ret)
5028 goto bad;
5029 } else {
5030 ret = 0;
a4ed38d7
DF		 5031 }
5032
5033 dout("%s %s%llu cookie %llu addr %s\n", __func__,
5034 ENTITY_NAME(item->name), item->cookie,
b726ec97 5035 ceph_pr_addr(&item->addr));
51fc7ab4
JL		 5036bad:
5037 return ret;
a4ed38d7
DF		 5038}
5039
5040static int decode_watchers(void **p, void *end,
5041 struct ceph_watch_item **watchers,
5042 u32 *num_watchers)
5043{
5044 u8 struct_v;
5045 u32 struct_len;
5046 int i;
5047 int ret;
5048
5049 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
5050 &struct_v, &struct_len);
5051 if (ret)
5052 return ret;
5053
5054 *num_watchers = ceph_decode_32(p);
5055 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
5056 if (!*watchers)
5057 return -ENOMEM;
5058
5059 for (i = 0; i < *num_watchers; i++) {
5060 ret = decode_watcher(p, end, *watchers + i);
5061 if (ret) {
5062 kfree(*watchers);
5063 return ret;
5064 }
5065 }
5066
5067 return 0;
5068}
5069
5070/*
5071 * On success, the caller is responsible for:
5072 *
5073 * kfree(watchers);
5074 */
5075int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
5076 struct ceph_object_id *oid,
5077 struct ceph_object_locator *oloc,
5078 struct ceph_watch_item **watchers,
5079 u32 *num_watchers)
5080{
5081 struct ceph_osd_request *req;
5082 struct page **pages;
5083 int ret;
5084
5085 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5086 if (!req)
5087 return -ENOMEM;
5088
5089 ceph_oid_copy(&req->r_base_oid, oid);
5090 ceph_oloc_copy(&req->r_base_oloc, oloc);
5091 req->r_flags = CEPH_OSD_FLAG_READ;
5092
a4ed38d7
DF		 5093 pages = ceph_alloc_page_vector(1, GFP_NOIO);
5094 if (IS_ERR(pages)) {
5095 ret = PTR_ERR(pages);
5096 goto out_put_req;
5097 }
5098
5099 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
5100 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
5101 response_data),
5102 pages, PAGE_SIZE, 0, false, true);
5103
26f887e0
ID		 5104 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5105 if (ret)
5106 goto out_put_req;
5107
a4ed38d7
DF		 5108 ceph_osdc_start_request(osdc, req, false);
5109 ret = ceph_osdc_wait_request(osdc, req);
5110 if (ret >= 0) {
5111 void *p = page_address(pages[0]);
5112 void *const end = p + req->r_ops[0].outdata_len;
5113
5114 ret = decode_watchers(&p, end, watchers, num_watchers);
5115 }
5116
5117out_put_req:
5118 ceph_osdc_put_request(req);
5119 return ret;
5120}
5121EXPORT_SYMBOL(ceph_osdc_list_watchers);
5122
dd935f44
JD		 5123/*
5124 * Call all pending notify callbacks - for use after a watch is
5125 * unregistered, to make sure no more callbacks for it will be invoked
5126 */
f6479449 5127void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44 5128{
99d16943 5129 dout("%s osdc %p\n", __func__, osdc);
dd935f44
JD		 5130 flush_workqueue(osdc->notify_wq);
5131}
5132EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5133
7cca78c9
ID		 5134void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5135{
5136 down_read(&osdc->lock);
5137 maybe_request_map(osdc);
5138 up_read(&osdc->lock);
5139}
5140EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
dd935f44 5141
428a7158
DF		 5142/*
5143 * Execute an OSD class method on an object.
5144 *
5145 * @flags: CEPH_OSD_FLAG_*
2544a020 5146 * @resp_len: in/out param for reply length
428a7158
DF		 5147 */
5148int ceph_osdc_call(struct ceph_osd_client *osdc,
5149 struct ceph_object_id *oid,
5150 struct ceph_object_locator *oloc,
5151 const char *class, const char *method,
5152 unsigned int flags,
5153 struct page *req_page, size_t req_len,
68ada915 5154 struct page **resp_pages, size_t *resp_len)
428a7158
DF		 5155{
5156 struct ceph_osd_request *req;
5157 int ret;
5158
68ada915 5159 if (req_len > PAGE_SIZE)
2544a020
ID		 5160 return -E2BIG;
5161
428a7158
DF		 5162 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5163 if (!req)
5164 return -ENOMEM;
5165
5166 ceph_oid_copy(&req->r_base_oid, oid);
5167 ceph_oloc_copy(&req->r_base_oloc, oloc);
5168 req->r_flags = flags;
5169
24639ce5 5170 ret = osd_req_op_cls_init(req, 0, class, method);
fe943d50
CX		 5171 if (ret)
5172 goto out_put_req;
5173
428a7158
DF		 5174 if (req_page)
5175 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5176 0, false, false);
68ada915
ID		 5177 if (resp_pages)
5178 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
2544a020 5179 *resp_len, 0, false, false);
428a7158 5180
26f887e0
ID		 5181 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5182 if (ret)
5183 goto out_put_req;
5184
428a7158
DF		 5185 ceph_osdc_start_request(osdc, req, false);
5186 ret = ceph_osdc_wait_request(osdc, req);
5187 if (ret >= 0) {
5188 ret = req->r_ops[0].rval;
68ada915 5189 if (resp_pages)
428a7158
DF		 5190 *resp_len = req->r_ops[0].outdata_len;
5191 }
5192
5193out_put_req:
5194 ceph_osdc_put_request(req);
5195 return ret;
5196}
5197EXPORT_SYMBOL(ceph_osdc_call);
5198
120a75ea
YZ		 5199/*
5200 * reset all osd connections
5201 */
5202void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc)
5203{
5204 struct rb_node *n;
5205
5206 down_write(&osdc->lock);
5207 for (n = rb_first(&osdc->osds); n; ) {
5208 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
5209
5210 n = rb_next(n);
5211 if (!reopen_osd(osd))
5212 kick_osd_requests(osd);
5213 }
5214 up_write(&osdc->lock);
5215}
5216
f24e9980
SW		 5217/*
5218 * init, shutdown
5219 */
5220int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5221{
5222 int err;
5223
5224 dout("init\n");
5225 osdc->client = client;
5aea3dcd 5226 init_rwsem(&osdc->lock);
f24e9980 5227 osdc->osds = RB_ROOT;
f5a2041b 5228 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 5229 spin_lock_init(&osdc->osd_lru_lock);
5aea3dcd
ID		 5230 osd_init(&osdc->homeless_osd);
5231 osdc->homeless_osd.o_osdc = osdc;
5232 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
264048af 5233 osdc->last_linger_id = CEPH_LINGER_ID_START;
922dab61 5234 osdc->linger_requests = RB_ROOT;
4609245e
ID		 5235 osdc->map_checks = RB_ROOT;
5236 osdc->linger_map_checks = RB_ROOT;
f24e9980 5237 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b
YS		 5238 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5239
5f44f142 5240 err = -ENOMEM;
e5253a7b
ID		 5241 osdc->osdmap = ceph_osdmap_alloc();
5242 if (!osdc->osdmap)
5243 goto out;
5244
9e767adb
ID		 5245 osdc->req_mempool = mempool_create_slab_pool(10,
5246 ceph_osd_request_cache);
f24e9980 5247 if (!osdc->req_mempool)
e5253a7b 5248 goto out_map;
f24e9980 5249
d50b409f 5250 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
0d9c1ab3 5251 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
f24e9980 5252 if (err < 0)
5f44f142 5253 goto out_mempool;
d50b409f 5254 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
0d9c1ab3
ID		 5255 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5256 "osd_op_reply");
c16e7869
SW		 5257 if (err < 0)
5258 goto out_msgpool;
a40c4f10 5259
dbcae088 5260 err = -ENOMEM;
a40c4f10 5261 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 5262 if (!osdc->notify_wq)
c172ec5c
ID		 5263 goto out_msgpool_reply;
5264
88bc1922
ID		 5265 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5266 if (!osdc->completion_wq)
5267 goto out_notify_wq;
5268
fbca9635
ID		 5269 schedule_delayed_work(&osdc->timeout_work,
5270 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 5271 schedule_delayed_work(&osdc->osds_timeout_work,
5272 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5273
f24e9980 5274 return 0;
5f44f142 5275
88bc1922
ID		 5276out_notify_wq:
5277 destroy_workqueue(osdc->notify_wq);
c172ec5c
ID		 5278out_msgpool_reply:
5279 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 5280out_msgpool:
5281 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 5282out_mempool:
5283 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 5284out_map:
5285 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 5286out:
5287 return err;
f24e9980
SW		 5288}
5289
5290void ceph_osdc_stop(struct ceph_osd_client *osdc)
5291{
88bc1922 5292 destroy_workqueue(osdc->completion_wq);
a40c4f10 5293 destroy_workqueue(osdc->notify_wq);
f24e9980 5294 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 5295 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f 5296
5aea3dcd 5297 down_write(&osdc->lock);
42a2c09f
ID		 5298 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5299 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5300 struct ceph_osd, o_node);
5aea3dcd 5301 close_osd(osd);
42a2c09f 5302 }
5aea3dcd 5303 up_write(&osdc->lock);
02113a0f 5304 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5aea3dcd
ID		 5305 osd_cleanup(&osdc->homeless_osd);
5306
5307 WARN_ON(!list_empty(&osdc->osd_lru));
922dab61 5308 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4609245e
ID		 5309 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5310 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5aea3dcd
ID		 5311 WARN_ON(atomic_read(&osdc->num_requests));
5312 WARN_ON(atomic_read(&osdc->num_homeless));
42a2c09f 5313
e5253a7b 5314 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 5315 mempool_destroy(osdc->req_mempool);
5316 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 5317 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 5318}
5319
23ddf9be
LH		 5320static int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5321 u64 src_snapid, u64 src_version,
5322 struct ceph_object_id *src_oid,
5323 struct ceph_object_locator *src_oloc,
5324 u32 src_fadvise_flags,
5325 u32 dst_fadvise_flags,
78beb0ff 5326 u32 truncate_seq, u64 truncate_size,
23ddf9be
LH		 5327 u8 copy_from_flags)
5328{
5329 struct ceph_osd_req_op *op;
5330 struct page **pages;
5331 void *p, *end;
5332
5333 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5334 if (IS_ERR(pages))
5335 return PTR_ERR(pages);
5336
78beb0ff
LH		 5337 op = _osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2,
5338 dst_fadvise_flags);
23ddf9be
LH		 5339 op->copy_from.snapid = src_snapid;
5340 op->copy_from.src_version = src_version;
5341 op->copy_from.flags = copy_from_flags;
5342 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5343
5344 p = page_address(pages[0]);
5345 end = p + PAGE_SIZE;
5346 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5347 encode_oloc(&p, end, src_oloc);
78beb0ff
LH		 5348 ceph_encode_32(&p, truncate_seq);
5349 ceph_encode_64(&p, truncate_size);
23ddf9be
LH		 5350 op->indata_len = PAGE_SIZE - (end - p);
5351
5352 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5353 op->indata_len, 0, false, true);
5354 return 0;
5355}
5356
5357int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
5358 u64 src_snapid, u64 src_version,
5359 struct ceph_object_id *src_oid,
5360 struct ceph_object_locator *src_oloc,
5361 u32 src_fadvise_flags,
5362 struct ceph_object_id *dst_oid,
5363 struct ceph_object_locator *dst_oloc,
5364 u32 dst_fadvise_flags,
78beb0ff 5365 u32 truncate_seq, u64 truncate_size,
23ddf9be
LH		 5366 u8 copy_from_flags)
5367{
5368 struct ceph_osd_request *req;
5369 int ret;
5370
5371 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL);
5372 if (!req)
5373 return -ENOMEM;
5374
5375 req->r_flags = CEPH_OSD_FLAG_WRITE;
5376
5377 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
5378 ceph_oid_copy(&req->r_t.base_oid, dst_oid);
5379
5380 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid,
5381 src_oloc, src_fadvise_flags,
78beb0ff
LH		 5382 dst_fadvise_flags, truncate_seq,
5383 truncate_size, copy_from_flags);
23ddf9be
LH		 5384 if (ret)
5385 goto out;
5386
5387 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL);
5388 if (ret)
5389 goto out;
5390
5391 ceph_osdc_start_request(osdc, req, false);
5392 ret = ceph_osdc_wait_request(osdc, req);
5393
5394out:
5395 ceph_osdc_put_request(req);
5396 return ret;
5397}
5398EXPORT_SYMBOL(ceph_osdc_copy_from);
5399
57a35dfb 5400int __init ceph_osdc_setup(void)
5522ae0b 5401{
3f1af42a
ID		 5402 size_t size = sizeof(struct ceph_osd_request) +
5403 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5404
5522ae0b 5405 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 5406 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5407 0, 0, NULL);
5522ae0b
AE		 5408
5409 return ceph_osd_request_cache ? 0 : -ENOMEM;
5410}
5522ae0b
AE		 5411
5412void ceph_osdc_cleanup(void)
5413{
5414 BUG_ON(!ceph_osd_request_cache);
5415 kmem_cache_destroy(ceph_osd_request_cache);
5416 ceph_osd_request_cache = NULL;
5417}
5522ae0b 5418
f24e9980
SW		 5419/*
5420 * handle incoming message
5421 */
5422static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5423{
5424 struct ceph_osd *osd = con->private;
5aea3dcd 5425 struct ceph_osd_client *osdc = osd->o_osdc;
f24e9980
SW		 5426 int type = le16_to_cpu(msg->hdr.type);
5427
f24e9980
SW		 5428 switch (type) {
5429 case CEPH_MSG_OSD_MAP:
5430 ceph_osdc_handle_map(osdc, msg);
5431 break;
5432 case CEPH_MSG_OSD_OPREPLY:
5aea3dcd 5433 handle_reply(osd, msg);
f24e9980 5434 break;
a02a946d
ID		 5435 case CEPH_MSG_OSD_BACKOFF:
5436 handle_backoff(osd, msg);
5437 break;
a40c4f10
YS		 5438 case CEPH_MSG_WATCH_NOTIFY:
5439 handle_watch_notify(osdc, msg);
5440 break;
f24e9980
SW		 5441
5442 default:
5443 pr_err("received unknown message type %d %s\n", type,
5444 ceph_msg_type_name(type));
5445 }
5aea3dcd 5446
f24e9980
SW		 5447 ceph_msg_put(msg);
5448}
5449
5b3a4db3 5450/*
d15f9d69
ID		 5451 * Lookup and return message for incoming reply. Don't try to do
5452 * anything about a larger than preallocated data portion of the
5453 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 5454 */
5455static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 5456 struct ceph_msg_header *hdr,
5457 int *skip)
f24e9980
SW		 5458{
5459 struct ceph_osd *osd = con->private;
5460 struct ceph_osd_client *osdc = osd->o_osdc;
5aea3dcd 5461 struct ceph_msg *m = NULL;
0547a9b3 5462 struct ceph_osd_request *req;
3f0a4ac5 5463 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 5464 int data_len = le32_to_cpu(hdr->data_len);
5aea3dcd 5465 u64 tid = le64_to_cpu(hdr->tid);
f24e9980 5466
5aea3dcd
ID		 5467 down_read(&osdc->lock);
5468 if (!osd_registered(osd)) {
5469 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5470 *skip = 1;
5471 goto out_unlock_osdc;
5472 }
5473 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5474
5475 mutex_lock(&osd->lock);
5476 req = lookup_request(&osd->o_requests, tid);
0547a9b3 5477 if (!req) {
cd8140c6
ID		 5478 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5479 osd->o_osd, tid);
d15f9d69 5480 *skip = 1;
5aea3dcd 5481 goto out_unlock_session;
0547a9b3 5482 }
c16e7869 5483
ace6d3a9 5484 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 5485
f2be82b0 5486 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 5487 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5488 __func__, osd->o_osd, req->r_tid, front_len,
5489 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 5490 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5491 false);
a79832f2 5492 if (!m)
5aea3dcd 5493 goto out_unlock_session;
c16e7869
SW		 5494 ceph_msg_put(req->r_reply);
5495 req->r_reply = m;
5496 }
0fff87ec 5497
d15f9d69
ID		 5498 if (data_len > req->r_reply->data_length) {
5499 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5500 __func__, osd->o_osd, req->r_tid, data_len,
5501 req->r_reply->data_length);
5502 m = NULL;
5503 *skip = 1;
5aea3dcd 5504 goto out_unlock_session;
0547a9b3 5505 }
d15f9d69
ID		 5506
5507 m = ceph_msg_get(req->r_reply);
c16e7869 5508 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3 5509
5aea3dcd
ID		 5510out_unlock_session:
5511 mutex_unlock(&osd->lock);
5512out_unlock_osdc:
5513 up_read(&osdc->lock);
2450418c 5514 return m;
5b3a4db3
SW		 5515}
5516
19079203
ID		 5517static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5518{
5519 struct ceph_msg *m;
5520 int type = le16_to_cpu(hdr->type);
5521 u32 front_len = le32_to_cpu(hdr->front_len);
5522 u32 data_len = le32_to_cpu(hdr->data_len);
5523
0d9c1ab3 5524 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
19079203
ID		 5525 if (!m)
5526 return NULL;
5527
5528 if (data_len) {
5529 struct page **pages;
19079203
ID		 5530
5531 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5532 GFP_NOIO);
c22e853a 5533 if (IS_ERR(pages)) {
19079203
ID		 5534 ceph_msg_put(m);
5535 return NULL;
5536 }
5537
e8862740 5538 ceph_msg_data_add_pages(m, pages, data_len, 0, true);
19079203
ID		 5539 }
5540
5541 return m;
5542}
5543
5b3a4db3
SW		 5544static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5545 struct ceph_msg_header *hdr,
5546 int *skip)
5547{
5548 struct ceph_osd *osd = con->private;
5549 int type = le16_to_cpu(hdr->type);
5b3a4db3 5550
1c20f2d2 5551 *skip = 0;
5b3a4db3
SW		 5552 switch (type) {
5553 case CEPH_MSG_OSD_MAP:
a02a946d 5554 case CEPH_MSG_OSD_BACKOFF:
a40c4f10 5555 case CEPH_MSG_WATCH_NOTIFY:
19079203 5556 return alloc_msg_with_page_vector(hdr);
5b3a4db3
SW		 5557 case CEPH_MSG_OSD_OPREPLY:
5558 return get_reply(con, hdr, skip);
5559 default:
5aea3dcd
ID		 5560 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5561 osd->o_osd, type);
5b3a4db3
SW		 5562 *skip = 1;
5563 return NULL;
5564 }
f24e9980
SW		 5565}
5566
5567/*
5568 * Wrappers to refcount containing ceph_osd struct
5569 */
5570static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5571{
5572 struct ceph_osd *osd = con->private;
5573 if (get_osd(osd))
5574 return con;
5575 return NULL;
5576}
5577
5578static void put_osd_con(struct ceph_connection *con)
5579{
5580 struct ceph_osd *osd = con->private;
5581 put_osd(osd);
5582}
5583
4e7a5dcd
SW		 5584/*
5585 * authentication
5586 */
a3530df3
AE		 5587/*
5588 * Note: returned pointer is the address of a structure that's
5589 * managed separately. Caller must *not* attempt to free it.
5590 */
5591static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 5592 int *proto, int force_new)
4e7a5dcd
SW		 5593{
5594 struct ceph_osd *o = con->private;
5595 struct ceph_osd_client *osdc = o->o_osdc;
5596 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 5597 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 5598
74f1869f 5599 if (force_new && auth->authorizer) {
6c1ea260 5600 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 5601 auth->authorizer = NULL;
5602 }
27859f97
SW		 5603 if (!auth->authorizer) {
5604 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5605 auth);
4e7a5dcd 5606 if (ret)
a3530df3 5607 return ERR_PTR(ret);
27859f97
SW		 5608 } else {
5609 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 5610 auth);
5611 if (ret)
5612 return ERR_PTR(ret);
4e7a5dcd 5613 }
4e7a5dcd 5614 *proto = ac->protocol;
74f1869f 5615
a3530df3 5616 return auth;
4e7a5dcd
SW		 5617}
5618
6daca13d
ID		 5619static int add_authorizer_challenge(struct ceph_connection *con,
5620 void *challenge_buf, int challenge_buf_len)
5621{
5622 struct ceph_osd *o = con->private;
5623 struct ceph_osd_client *osdc = o->o_osdc;
5624 struct ceph_auth_client *ac = osdc->client->monc.auth;
5625
5626 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5627 challenge_buf, challenge_buf_len);
5628}
4e7a5dcd 5629
0dde5848 5630static int verify_authorizer_reply(struct ceph_connection *con)
4e7a5dcd
SW		 5631{
5632 struct ceph_osd *o = con->private;
5633 struct ceph_osd_client *osdc = o->o_osdc;
5634 struct ceph_auth_client *ac = osdc->client->monc.auth;
5635
0dde5848 5636 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
4e7a5dcd
SW		 5637}
5638
9bd2e6f8
SW		 5639static int invalidate_authorizer(struct ceph_connection *con)
5640{
5641 struct ceph_osd *o = con->private;
5642 struct ceph_osd_client *osdc = o->o_osdc;
5643 struct ceph_auth_client *ac = osdc->client->monc.auth;
5644
27859f97 5645 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 5646 return ceph_monc_validate_auth(&osdc->client->monc);
5647}
4e7a5dcd 5648
8cb441c0
ID		 5649static void osd_reencode_message(struct ceph_msg *msg)
5650{
914902af
ID		 5651 int type = le16_to_cpu(msg->hdr.type);
5652
5653 if (type == CEPH_MSG_OSD_OP)
5654 encode_request_finish(msg);
8cb441c0
ID		 5655}
5656
79dbd1ba 5657static int osd_sign_message(struct ceph_msg *msg)
33d07337 5658{
79dbd1ba 5659 struct ceph_osd *o = msg->con->private;
33d07337 5660 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5661
33d07337
YZ		 5662 return ceph_auth_sign_message(auth, msg);
5663}
5664
79dbd1ba 5665static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 5666{
79dbd1ba 5667 struct ceph_osd *o = msg->con->private;
33d07337 5668 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 5669
33d07337
YZ		 5670 return ceph_auth_check_message_signature(auth, msg);
5671}
5672
9e32789f 5673static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 5674 .get = get_osd_con,
5675 .put = put_osd_con,
5676 .dispatch = dispatch,
4e7a5dcd 5677 .get_authorizer = get_authorizer,
6daca13d 5678 .add_authorizer_challenge = add_authorizer_challenge,
4e7a5dcd 5679 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 5680 .invalidate_authorizer = invalidate_authorizer,
f24e9980 5681 .alloc_msg = alloc_msg,
8cb441c0 5682 .reencode_message = osd_reencode_message,
79dbd1ba
ID		 5683 .sign_message = osd_sign_message,
5684 .check_message_signature = osd_check_message_signature,
5aea3dcd 5685 .fault = osd_fault,
f24e9980 5686};
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