]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blame - net/ceph/osd_client.c
projects / mirror_ubuntu-zesty-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
libceph: remove now unused finish_request() wrapper
[mirror_ubuntu-zesty-kernel.git] / net / ceph / osd_client.c
CommitLineData
a4ce40a9 1
3d14c5d2 2#include <linux/ceph/ceph_debug.h>
f24e9980 3
3d14c5d2 4#include <linux/module.h>
f24e9980
SW		 5#include <linux/err.h>
6#include <linux/highmem.h>
7#include <linux/mm.h>
8#include <linux/pagemap.h>
9#include <linux/slab.h>
10#include <linux/uaccess.h>
68b4476b
YS		 11#ifdef CONFIG_BLOCK
12#include <linux/bio.h>
13#endif
f24e9980 14
3d14c5d2
YS		 15#include <linux/ceph/libceph.h>
16#include <linux/ceph/osd_client.h>
17#include <linux/ceph/messenger.h>
18#include <linux/ceph/decode.h>
19#include <linux/ceph/auth.h>
20#include <linux/ceph/pagelist.h>
f24e9980 21
c16e7869 22#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 23
5522ae0b
AE		 24static struct kmem_cache *ceph_osd_request_cache;
25
9e32789f 26static const struct ceph_connection_operations osd_con_ops;
f24e9980 27
f24e9980
SW		 28/*
29 * Implement client access to distributed object storage cluster.
30 *
31 * All data objects are stored within a cluster/cloud of OSDs, or
32 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
33 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
34 * remote daemons serving up and coordinating consistent and safe
35 * access to storage.
36 *
37 * Cluster membership and the mapping of data objects onto storage devices
38 * are described by the osd map.
39 *
40 * We keep track of pending OSD requests (read, write), resubmit
41 * requests to different OSDs when the cluster topology/data layout
42 * change, or retry the affected requests when the communications
43 * channel with an OSD is reset.
44 */
45
5aea3dcd
ID		 46static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
47static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
922dab61
ID		 48static void link_linger(struct ceph_osd *osd,
49 struct ceph_osd_linger_request *lreq);
50static void unlink_linger(struct ceph_osd *osd,
51 struct ceph_osd_linger_request *lreq);
5aea3dcd
ID		 52
53#if 1
54static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
55{
56 bool wrlocked = true;
57
58 if (unlikely(down_read_trylock(sem))) {
59 wrlocked = false;
60 up_read(sem);
61 }
62
63 return wrlocked;
64}
65static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
66{
67 WARN_ON(!rwsem_is_locked(&osdc->lock));
68}
69static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
70{
71 WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
72}
73static inline void verify_osd_locked(struct ceph_osd *osd)
74{
75 struct ceph_osd_client *osdc = osd->o_osdc;
76
77 WARN_ON(!(mutex_is_locked(&osd->lock) &&
78 rwsem_is_locked(&osdc->lock)) &&
79 !rwsem_is_wrlocked(&osdc->lock));
80}
922dab61
ID		 81static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
82{
83 WARN_ON(!mutex_is_locked(&lreq->lock));
84}
5aea3dcd
ID		 85#else
86static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
87static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
88static inline void verify_osd_locked(struct ceph_osd *osd) { }
922dab61 89static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
5aea3dcd
ID		 90#endif
91
f24e9980
SW		 92/*
93 * calculate the mapping of a file extent onto an object, and fill out the
94 * request accordingly. shorten extent as necessary if it crosses an
95 * object boundary.
96 *
97 * fill osd op in request message.
98 */
dbe0fc41 99static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 100 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 101{
60e56f13 102 u64 orig_len = *plen;
d63b77f4 103 int r;
f24e9980 104
60e56f13 105 /* object extent? */
75d1c941
AE		 106 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
107 objoff, objlen);
d63b77f4
SW		 108 if (r < 0)
109 return r;
75d1c941
AE		 110 if (*objlen < orig_len) {
111 *plen = *objlen;
60e56f13
AE		 112 dout(" skipping last %llu, final file extent %llu~%llu\n",
113 orig_len - *plen, off, *plen);
114 }
115
75d1c941 116 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
f24e9980 117
3ff5f385 118 return 0;
f24e9980
SW		 119}
120
c54d47bf
AE		 121static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
122{
123 memset(osd_data, 0, sizeof (*osd_data));
124 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
125}
126
a4ce40a9 127static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 128 struct page **pages, u64 length, u32 alignment,
129 bool pages_from_pool, bool own_pages)
130{
131 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
132 osd_data->pages = pages;
133 osd_data->length = length;
134 osd_data->alignment = alignment;
135 osd_data->pages_from_pool = pages_from_pool;
136 osd_data->own_pages = own_pages;
137}
43bfe5de 138
a4ce40a9 139static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 140 struct ceph_pagelist *pagelist)
141{
142 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
143 osd_data->pagelist = pagelist;
144}
43bfe5de
AE		 145
146#ifdef CONFIG_BLOCK
a4ce40a9 147static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 148 struct bio *bio, size_t bio_length)
149{
150 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
151 osd_data->bio = bio;
152 osd_data->bio_length = bio_length;
153}
43bfe5de
AE		 154#endif /* CONFIG_BLOCK */
155
8a703a38
IC		 156#define osd_req_op_data(oreq, whch, typ, fld) \
157({ \
158 struct ceph_osd_request *__oreq = (oreq); \
159 unsigned int __whch = (whch); \
160 BUG_ON(__whch >= __oreq->r_num_ops); \
161 &__oreq->r_ops[__whch].typ.fld; \
162})
863c7eb5 163
49719778
AE		 164static struct ceph_osd_data *
165osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
166{
167 BUG_ON(which >= osd_req->r_num_ops);
168
169 return &osd_req->r_ops[which].raw_data_in;
170}
171
a4ce40a9
AE		 172struct ceph_osd_data *
173osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 174 unsigned int which)
a4ce40a9 175{
863c7eb5 176 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 177}
178EXPORT_SYMBOL(osd_req_op_extent_osd_data);
179
49719778
AE		 180void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
181 unsigned int which, struct page **pages,
182 u64 length, u32 alignment,
183 bool pages_from_pool, bool own_pages)
184{
185 struct ceph_osd_data *osd_data;
186
187 osd_data = osd_req_op_raw_data_in(osd_req, which);
188 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
189 pages_from_pool, own_pages);
190}
191EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
192
a4ce40a9 193void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 194 unsigned int which, struct page **pages,
195 u64 length, u32 alignment,
a4ce40a9
AE		 196 bool pages_from_pool, bool own_pages)
197{
198 struct ceph_osd_data *osd_data;
199
863c7eb5 200 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 201 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
202 pages_from_pool, own_pages);
a4ce40a9
AE		 203}
204EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
205
206void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 207 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 208{
209 struct ceph_osd_data *osd_data;
210
863c7eb5 211 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 212 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 213}
214EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
215
216#ifdef CONFIG_BLOCK
217void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 218 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 219{
220 struct ceph_osd_data *osd_data;
863c7eb5
AE		 221
222 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 223 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 224}
225EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
226#endif /* CONFIG_BLOCK */
227
228static void osd_req_op_cls_request_info_pagelist(
229 struct ceph_osd_request *osd_req,
230 unsigned int which, struct ceph_pagelist *pagelist)
231{
232 struct ceph_osd_data *osd_data;
233
863c7eb5 234 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 235 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 236}
237
04017e29
AE		 238void osd_req_op_cls_request_data_pagelist(
239 struct ceph_osd_request *osd_req,
240 unsigned int which, struct ceph_pagelist *pagelist)
241{
242 struct ceph_osd_data *osd_data;
243
863c7eb5 244 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29 245 ceph_osd_data_pagelist_init(osd_data, pagelist);
bb873b53
ID		 246 osd_req->r_ops[which].cls.indata_len += pagelist->length;
247 osd_req->r_ops[which].indata_len += pagelist->length;
04017e29
AE		 248}
249EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
250
6c57b554
AE		 251void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
252 unsigned int which, struct page **pages, u64 length,
253 u32 alignment, bool pages_from_pool, bool own_pages)
254{
255 struct ceph_osd_data *osd_data;
256
257 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
258 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
259 pages_from_pool, own_pages);
bb873b53
ID		 260 osd_req->r_ops[which].cls.indata_len += length;
261 osd_req->r_ops[which].indata_len += length;
6c57b554
AE		 262}
263EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
264
a4ce40a9
AE		 265void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
266 unsigned int which, struct page **pages, u64 length,
267 u32 alignment, bool pages_from_pool, bool own_pages)
268{
269 struct ceph_osd_data *osd_data;
270
863c7eb5 271 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 272 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
273 pages_from_pool, own_pages);
a4ce40a9
AE		 274}
275EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
276
23c08a9c
AE		 277static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
278{
279 switch (osd_data->type) {
280 case CEPH_OSD_DATA_TYPE_NONE:
281 return 0;
282 case CEPH_OSD_DATA_TYPE_PAGES:
283 return osd_data->length;
284 case CEPH_OSD_DATA_TYPE_PAGELIST:
285 return (u64)osd_data->pagelist->length;
286#ifdef CONFIG_BLOCK
287 case CEPH_OSD_DATA_TYPE_BIO:
288 return (u64)osd_data->bio_length;
289#endif /* CONFIG_BLOCK */
290 default:
291 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
292 return 0;
293 }
294}
295
c54d47bf
AE		 296static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
297{
5476492f 298 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 299 int num_pages;
300
301 num_pages = calc_pages_for((u64)osd_data->alignment,
302 (u64)osd_data->length);
303 ceph_release_page_vector(osd_data->pages, num_pages);
304 }
5476492f
AE		 305 ceph_osd_data_init(osd_data);
306}
307
308static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
309 unsigned int which)
310{
311 struct ceph_osd_req_op *op;
312
313 BUG_ON(which >= osd_req->r_num_ops);
314 op = &osd_req->r_ops[which];
315
316 switch (op->op) {
317 case CEPH_OSD_OP_READ:
318 case CEPH_OSD_OP_WRITE:
e30b7577 319 case CEPH_OSD_OP_WRITEFULL:
5476492f
AE		 320 ceph_osd_data_release(&op->extent.osd_data);
321 break;
322 case CEPH_OSD_OP_CALL:
323 ceph_osd_data_release(&op->cls.request_info);
04017e29 324 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 325 ceph_osd_data_release(&op->cls.response_data);
326 break;
d74b50be
YZ		 327 case CEPH_OSD_OP_SETXATTR:
328 case CEPH_OSD_OP_CMPXATTR:
329 ceph_osd_data_release(&op->xattr.osd_data);
330 break;
66ba609f
YZ		 331 case CEPH_OSD_OP_STAT:
332 ceph_osd_data_release(&op->raw_data_in);
333 break;
922dab61
ID		 334 case CEPH_OSD_OP_NOTIFY_ACK:
335 ceph_osd_data_release(&op->notify_ack.request_data);
336 break;
19079203
ID		 337 case CEPH_OSD_OP_NOTIFY:
338 ceph_osd_data_release(&op->notify.request_data);
339 ceph_osd_data_release(&op->notify.response_data);
340 break;
a4ed38d7
DF		 341 case CEPH_OSD_OP_LIST_WATCHERS:
342 ceph_osd_data_release(&op->list_watchers.response_data);
343 break;
5476492f
AE		 344 default:
345 break;
346 }
c54d47bf
AE		 347}
348
63244fa1
ID		 349/*
350 * Assumes @t is zero-initialized.
351 */
352static void target_init(struct ceph_osd_request_target *t)
353{
354 ceph_oid_init(&t->base_oid);
355 ceph_oloc_init(&t->base_oloc);
356 ceph_oid_init(&t->target_oid);
357 ceph_oloc_init(&t->target_oloc);
358
359 ceph_osds_init(&t->acting);
360 ceph_osds_init(&t->up);
361 t->size = -1;
362 t->min_size = -1;
363
364 t->osd = CEPH_HOMELESS_OSD;
365}
366
922dab61
ID		 367static void target_copy(struct ceph_osd_request_target *dest,
368 const struct ceph_osd_request_target *src)
369{
370 ceph_oid_copy(&dest->base_oid, &src->base_oid);
371 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
372 ceph_oid_copy(&dest->target_oid, &src->target_oid);
373 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
374
375 dest->pgid = src->pgid; /* struct */
376 dest->pg_num = src->pg_num;
377 dest->pg_num_mask = src->pg_num_mask;
378 ceph_osds_copy(&dest->acting, &src->acting);
379 ceph_osds_copy(&dest->up, &src->up);
380 dest->size = src->size;
381 dest->min_size = src->min_size;
382 dest->sort_bitwise = src->sort_bitwise;
383
384 dest->flags = src->flags;
385 dest->paused = src->paused;
386
387 dest->osd = src->osd;
388}
389
63244fa1
ID		 390static void target_destroy(struct ceph_osd_request_target *t)
391{
392 ceph_oid_destroy(&t->base_oid);
30c156d9 393 ceph_oloc_destroy(&t->base_oloc);
63244fa1 394 ceph_oid_destroy(&t->target_oid);
30c156d9 395 ceph_oloc_destroy(&t->target_oloc);
63244fa1
ID		 396}
397
f24e9980
SW		 398/*
399 * requests
400 */
3540bfdb
ID		 401static void request_release_checks(struct ceph_osd_request *req)
402{
403 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
4609245e 404 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
3540bfdb
ID		 405 WARN_ON(!list_empty(&req->r_unsafe_item));
406 WARN_ON(req->r_osd);
407}
408
9e94af20 409static void ceph_osdc_release_request(struct kref *kref)
f24e9980 410{
9e94af20
ID		 411 struct ceph_osd_request *req = container_of(kref,
412 struct ceph_osd_request, r_kref);
5476492f 413 unsigned int which;
415e49a9 414
9e94af20
ID		 415 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
416 req->r_request, req->r_reply);
3540bfdb 417 request_release_checks(req);
9e94af20 418
415e49a9
SW		 419 if (req->r_request)
420 ceph_msg_put(req->r_request);
5aea3dcd 421 if (req->r_reply)
ab8cb34a 422 ceph_msg_put(req->r_reply);
0fff87ec 423
5476492f
AE		 424 for (which = 0; which < req->r_num_ops; which++)
425 osd_req_op_data_release(req, which);
0fff87ec 426
a66dd383 427 target_destroy(&req->r_t);
415e49a9 428 ceph_put_snap_context(req->r_snapc);
d30291b9 429
415e49a9
SW		 430 if (req->r_mempool)
431 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 432 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 433 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 434 else
435 kfree(req);
f24e9980 436}
9e94af20
ID		 437
438void ceph_osdc_get_request(struct ceph_osd_request *req)
439{
440 dout("%s %p (was %d)\n", __func__, req,
441 atomic_read(&req->r_kref.refcount));
442 kref_get(&req->r_kref);
443}
444EXPORT_SYMBOL(ceph_osdc_get_request);
445
446void ceph_osdc_put_request(struct ceph_osd_request *req)
447{
3ed97d63
ID		 448 if (req) {
449 dout("%s %p (was %d)\n", __func__, req,
450 atomic_read(&req->r_kref.refcount));
451 kref_put(&req->r_kref, ceph_osdc_release_request);
452 }
9e94af20
ID		 453}
454EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 455
3540bfdb
ID		 456static void request_init(struct ceph_osd_request *req)
457{
458 /* req only, each op is zeroed in _osd_req_op_init() */
459 memset(req, 0, sizeof(*req));
460
461 kref_init(&req->r_kref);
462 init_completion(&req->r_completion);
c297eb42 463 init_completion(&req->r_done_completion);
3540bfdb 464 RB_CLEAR_NODE(&req->r_node);
4609245e 465 RB_CLEAR_NODE(&req->r_mc_node);
3540bfdb
ID		 466 INIT_LIST_HEAD(&req->r_unsafe_item);
467
468 target_init(&req->r_t);
469}
470
922dab61
ID		 471/*
472 * This is ugly, but it allows us to reuse linger registration and ping
473 * requests, keeping the structure of the code around send_linger{_ping}()
474 * reasonable. Setting up a min_nr=2 mempool for each linger request
475 * and dealing with copying ops (this blasts req only, watch op remains
476 * intact) isn't any better.
477 */
478static void request_reinit(struct ceph_osd_request *req)
479{
480 struct ceph_osd_client *osdc = req->r_osdc;
481 bool mempool = req->r_mempool;
482 unsigned int num_ops = req->r_num_ops;
483 u64 snapid = req->r_snapid;
484 struct ceph_snap_context *snapc = req->r_snapc;
485 bool linger = req->r_linger;
486 struct ceph_msg *request_msg = req->r_request;
487 struct ceph_msg *reply_msg = req->r_reply;
488
489 dout("%s req %p\n", __func__, req);
490 WARN_ON(atomic_read(&req->r_kref.refcount) != 1);
491 request_release_checks(req);
492
493 WARN_ON(atomic_read(&request_msg->kref.refcount) != 1);
494 WARN_ON(atomic_read(&reply_msg->kref.refcount) != 1);
495 target_destroy(&req->r_t);
496
497 request_init(req);
498 req->r_osdc = osdc;
499 req->r_mempool = mempool;
500 req->r_num_ops = num_ops;
501 req->r_snapid = snapid;
502 req->r_snapc = snapc;
503 req->r_linger = linger;
504 req->r_request = request_msg;
505 req->r_reply = reply_msg;
506}
507
3499e8a5 508struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 509 struct ceph_snap_context *snapc,
1b83bef2 510 unsigned int num_ops,
3499e8a5 511 bool use_mempool,
54a54007 512 gfp_t gfp_flags)
f24e9980
SW		 513{
514 struct ceph_osd_request *req;
1b83bef2 515
f24e9980 516 if (use_mempool) {
3f1af42a 517 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 518 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 519 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
520 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 521 } else {
3f1af42a
ID		 522 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
523 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
524 gfp_flags);
f24e9980 525 }
3f1af42a 526 if (unlikely(!req))
a79832f2 527 return NULL;
f24e9980 528
3540bfdb 529 request_init(req);
f24e9980
SW		 530 req->r_osdc = osdc;
531 req->r_mempool = use_mempool;
79528734 532 req->r_num_ops = num_ops;
84127282
ID		 533 req->r_snapid = CEPH_NOSNAP;
534 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 535
13d1ad16
ID		 536 dout("%s req %p\n", __func__, req);
537 return req;
538}
539EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 540
30c156d9
YZ		 541static int ceph_oloc_encoding_size(struct ceph_object_locator *oloc)
542{
543 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
544}
545
13d1ad16
ID		 546int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
547{
548 struct ceph_osd_client *osdc = req->r_osdc;
549 struct ceph_msg *msg;
550 int msg_size;
c16e7869 551
d30291b9 552 WARN_ON(ceph_oid_empty(&req->r_base_oid));
30c156d9 553 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
d30291b9 554
13d1ad16 555 /* create request message */
ae458f5a
ID		 556 msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
557 msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
30c156d9
YZ		 558 msg_size += CEPH_ENCODING_START_BLK_LEN +
559 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
ae458f5a 560 msg_size += 1 + 8 + 4 + 4; /* pgid */
13d1ad16
ID		 561 msg_size += 4 + req->r_base_oid.name_len; /* oid */
562 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 563 msg_size += 8; /* snapid */
564 msg_size += 8; /* snap_seq */
13d1ad16 565 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
ae458f5a
ID		 566 msg_size += 4; /* retry_attempt */
567
13d1ad16 568 if (req->r_mempool)
8f3bc053 569 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 570 else
13d1ad16
ID		 571 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
572 if (!msg)
573 return -ENOMEM;
68b4476b 574
f24e9980 575 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 576 req->r_request = msg;
3499e8a5 577
13d1ad16
ID		 578 /* create reply message */
579 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 580 msg_size += req->r_base_oid.name_len;
581 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 582
583 if (req->r_mempool)
584 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
585 else
586 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
587 if (!msg)
588 return -ENOMEM;
589
590 req->r_reply = msg;
591
592 return 0;
3499e8a5 593}
13d1ad16 594EXPORT_SYMBOL(ceph_osdc_alloc_messages);
3499e8a5 595
a8dd0a37 596static bool osd_req_opcode_valid(u16 opcode)
68b4476b 597{
a8dd0a37 598 switch (opcode) {
70b5bfa3
ID		 599#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
600__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
601#undef GENERATE_CASE
a8dd0a37
AE		 602 default:
603 return false;
604 }
605}
606
33803f33
AE		 607/*
608 * This is an osd op init function for opcodes that have no data or
609 * other information associated with them. It also serves as a
610 * common init routine for all the other init functions, below.
611 */
c99d2d4a 612static struct ceph_osd_req_op *
49719778 613_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 614 u16 opcode, u32 flags)
33803f33 615{
c99d2d4a
AE		 616 struct ceph_osd_req_op *op;
617
618 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 619 BUG_ON(!osd_req_opcode_valid(opcode));
620
c99d2d4a 621 op = &osd_req->r_ops[which];
33803f33 622 memset(op, 0, sizeof (*op));
33803f33 623 op->op = opcode;
144cba14 624 op->flags = flags;
c99d2d4a
AE		 625
626 return op;
33803f33
AE		 627}
628
49719778 629void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 630 unsigned int which, u16 opcode, u32 flags)
49719778 631{
144cba14 632 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 633}
634EXPORT_SYMBOL(osd_req_op_init);
635
c99d2d4a
AE		 636void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
637 unsigned int which, u16 opcode,
33803f33
AE		 638 u64 offset, u64 length,
639 u64 truncate_size, u32 truncate_seq)
640{
144cba14
YZ		 641 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
642 opcode, 0);
33803f33
AE		 643 size_t payload_len = 0;
644
ad7a60de 645 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 646 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
647 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 648
33803f33
AE		 649 op->extent.offset = offset;
650 op->extent.length = length;
651 op->extent.truncate_size = truncate_size;
652 op->extent.truncate_seq = truncate_seq;
e30b7577 653 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 654 payload_len += length;
655
de2aa102 656 op->indata_len = payload_len;
33803f33
AE		 657}
658EXPORT_SYMBOL(osd_req_op_extent_init);
659
c99d2d4a
AE		 660void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
661 unsigned int which, u64 length)
e5975c7c 662{
c99d2d4a
AE		 663 struct ceph_osd_req_op *op;
664 u64 previous;
665
666 BUG_ON(which >= osd_req->r_num_ops);
667 op = &osd_req->r_ops[which];
668 previous = op->extent.length;
e5975c7c
AE		 669
670 if (length == previous)
671 return; /* Nothing to do */
672 BUG_ON(length > previous);
673
674 op->extent.length = length;
de2aa102 675 op->indata_len -= previous - length;
e5975c7c
AE		 676}
677EXPORT_SYMBOL(osd_req_op_extent_update);
678
2c63f49a
YZ		 679void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
680 unsigned int which, u64 offset_inc)
681{
682 struct ceph_osd_req_op *op, *prev_op;
683
684 BUG_ON(which + 1 >= osd_req->r_num_ops);
685
686 prev_op = &osd_req->r_ops[which];
687 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
688 /* dup previous one */
689 op->indata_len = prev_op->indata_len;
690 op->outdata_len = prev_op->outdata_len;
691 op->extent = prev_op->extent;
692 /* adjust offset */
693 op->extent.offset += offset_inc;
694 op->extent.length -= offset_inc;
695
696 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
697 op->indata_len -= offset_inc;
698}
699EXPORT_SYMBOL(osd_req_op_extent_dup_last);
700
c99d2d4a 701void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 702 u16 opcode, const char *class, const char *method)
33803f33 703{
144cba14
YZ		 704 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
705 opcode, 0);
5f562df5 706 struct ceph_pagelist *pagelist;
33803f33
AE		 707 size_t payload_len = 0;
708 size_t size;
709
710 BUG_ON(opcode != CEPH_OSD_OP_CALL);
711
5f562df5
AE		 712 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
713 BUG_ON(!pagelist);
714 ceph_pagelist_init(pagelist);
715
33803f33
AE		 716 op->cls.class_name = class;
717 size = strlen(class);
718 BUG_ON(size > (size_t) U8_MAX);
719 op->cls.class_len = size;
5f562df5 720 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 721 payload_len += size;
722
723 op->cls.method_name = method;
724 size = strlen(method);
725 BUG_ON(size > (size_t) U8_MAX);
726 op->cls.method_len = size;
5f562df5 727 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 728 payload_len += size;
729
a4ce40a9 730 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 731
de2aa102 732 op->indata_len = payload_len;
33803f33
AE		 733}
734EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 735
d74b50be
YZ		 736int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
737 u16 opcode, const char *name, const void *value,
738 size_t size, u8 cmp_op, u8 cmp_mode)
739{
144cba14
YZ		 740 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
741 opcode, 0);
d74b50be
YZ		 742 struct ceph_pagelist *pagelist;
743 size_t payload_len;
744
745 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
746
747 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
748 if (!pagelist)
749 return -ENOMEM;
750
751 ceph_pagelist_init(pagelist);
752
753 payload_len = strlen(name);
754 op->xattr.name_len = payload_len;
755 ceph_pagelist_append(pagelist, name, payload_len);
756
757 op->xattr.value_len = size;
758 ceph_pagelist_append(pagelist, value, size);
759 payload_len += size;
760
761 op->xattr.cmp_op = cmp_op;
762 op->xattr.cmp_mode = cmp_mode;
763
764 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 765 op->indata_len = payload_len;
d74b50be
YZ		 766 return 0;
767}
768EXPORT_SYMBOL(osd_req_op_xattr_init);
769
922dab61
ID		 770/*
771 * @watch_opcode: CEPH_OSD_WATCH_OP_*
772 */
773static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
774 u64 cookie, u8 watch_opcode)
33803f33 775{
922dab61 776 struct ceph_osd_req_op *op;
33803f33 777
922dab61 778 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
33803f33 779 op->watch.cookie = cookie;
922dab61
ID		 780 op->watch.op = watch_opcode;
781 op->watch.gen = 0;
33803f33 782}
33803f33 783
c647b8a8
ID		 784void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
785 unsigned int which,
786 u64 expected_object_size,
787 u64 expected_write_size)
788{
789 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 790 CEPH_OSD_OP_SETALLOCHINT,
791 0);
c647b8a8
ID		 792
793 op->alloc_hint.expected_object_size = expected_object_size;
794 op->alloc_hint.expected_write_size = expected_write_size;
795
796 /*
797 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
798 * not worth a feature bit. Set FAILOK per-op flag to make
799 * sure older osds don't trip over an unsupported opcode.
800 */
801 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
802}
803EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
804
90af3602 805static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 806 struct ceph_osd_data *osd_data)
807{
808 u64 length = ceph_osd_data_length(osd_data);
809
810 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
811 BUG_ON(length > (u64) SIZE_MAX);
812 if (length)
90af3602 813 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 814 length, osd_data->alignment);
815 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
816 BUG_ON(!length);
90af3602 817 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 818#ifdef CONFIG_BLOCK
819 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 820 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 821#endif
822 } else {
823 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
824 }
825}
826
bb873b53
ID		 827static u32 osd_req_encode_op(struct ceph_osd_op *dst,
828 const struct ceph_osd_req_op *src)
a8dd0a37 829{
a8dd0a37
AE		 830 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
831 pr_err("unrecognized osd opcode %d\n", src->op);
832
833 return 0;
834 }
835
836 switch (src->op) {
837 case CEPH_OSD_OP_STAT:
838 break;
839 case CEPH_OSD_OP_READ:
840 case CEPH_OSD_OP_WRITE:
e30b7577 841 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 842 case CEPH_OSD_OP_ZERO:
ad7a60de 843 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37
AE		 844 dst->extent.offset = cpu_to_le64(src->extent.offset);
845 dst->extent.length = cpu_to_le64(src->extent.length);
846 dst->extent.truncate_size =
847 cpu_to_le64(src->extent.truncate_size);
848 dst->extent.truncate_seq =
849 cpu_to_le32(src->extent.truncate_seq);
850 break;
851 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 852 dst->cls.class_len = src->cls.class_len;
853 dst->cls.method_len = src->cls.method_len;
bb873b53 854 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
a8dd0a37
AE		 855 break;
856 case CEPH_OSD_OP_STARTSYNC:
857 break;
a8dd0a37
AE		 858 case CEPH_OSD_OP_WATCH:
859 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
922dab61
ID		 860 dst->watch.ver = cpu_to_le64(0);
861 dst->watch.op = src->watch.op;
862 dst->watch.gen = cpu_to_le32(src->watch.gen);
863 break;
864 case CEPH_OSD_OP_NOTIFY_ACK:
a8dd0a37 865 break;
19079203
ID		 866 case CEPH_OSD_OP_NOTIFY:
867 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
868 break;
a4ed38d7
DF		 869 case CEPH_OSD_OP_LIST_WATCHERS:
870 break;
c647b8a8
ID		 871 case CEPH_OSD_OP_SETALLOCHINT:
872 dst->alloc_hint.expected_object_size =
873 cpu_to_le64(src->alloc_hint.expected_object_size);
874 dst->alloc_hint.expected_write_size =
875 cpu_to_le64(src->alloc_hint.expected_write_size);
876 break;
d74b50be
YZ		 877 case CEPH_OSD_OP_SETXATTR:
878 case CEPH_OSD_OP_CMPXATTR:
879 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
880 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
881 dst->xattr.cmp_op = src->xattr.cmp_op;
882 dst->xattr.cmp_mode = src->xattr.cmp_mode;
d74b50be 883 break;
864e9197
YZ		 884 case CEPH_OSD_OP_CREATE:
885 case CEPH_OSD_OP_DELETE:
886 break;
a8dd0a37 887 default:
4c46459c 888 pr_err("unsupported osd opcode %s\n",
8f63ca2d 889 ceph_osd_op_name(src->op));
4c46459c 890 WARN_ON(1);
a8dd0a37
AE		 891
892 return 0;
68b4476b 893 }
7b25bf5f 894
a8dd0a37 895 dst->op = cpu_to_le16(src->op);
7b25bf5f 896 dst->flags = cpu_to_le32(src->flags);
de2aa102 897 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 898
bb873b53 899 return src->indata_len;
68b4476b
YS		 900}
901
3499e8a5
YS		 902/*
903 * build new request AND message, calculate layout, and adjust file
904 * extent as needed.
905 *
906 * if the file was recently truncated, we include information about its
907 * old and new size so that the object can be updated appropriately. (we
908 * avoid synchronously deleting truncated objects because it's slow.)
909 *
910 * if @do_sync, include a 'startsync' command so that the osd will flush
911 * data quickly.
912 */
913struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
914 struct ceph_file_layout *layout,
915 struct ceph_vino vino,
715e4cd4
YZ		 916 u64 off, u64 *plen,
917 unsigned int which, int num_ops,
3499e8a5
YS		 918 int opcode, int flags,
919 struct ceph_snap_context *snapc,
3499e8a5
YS		 920 u32 truncate_seq,
921 u64 truncate_size,
153e5167 922 bool use_mempool)
3499e8a5 923{
68b4476b 924 struct ceph_osd_request *req;
75d1c941
AE		 925 u64 objnum = 0;
926 u64 objoff = 0;
927 u64 objlen = 0;
6816282d 928 int r;
68b4476b 929
ad7a60de 930 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 931 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
932 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 933
acead002 934 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 935 GFP_NOFS);
13d1ad16
ID		 936 if (!req) {
937 r = -ENOMEM;
938 goto fail;
939 }
79528734 940
3499e8a5 941 /* calculate max write size */
a19dadfb 942 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 943 if (r)
944 goto fail;
a19dadfb 945
864e9197 946 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 947 osd_req_op_init(req, which, opcode, 0);
864e9197 948 } else {
7627151e 949 u32 object_size = layout->object_size;
864e9197
YZ		 950 u32 object_base = off - objoff;
951 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
952 if (truncate_size <= object_base) {
953 truncate_size = 0;
954 } else {
955 truncate_size -= object_base;
956 if (truncate_size > object_size)
957 truncate_size = object_size;
958 }
ccca4e37 959 }
715e4cd4 960 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 961 truncate_size, truncate_seq);
962 }
d18d1e28 963
bb873b53 964 req->r_flags = flags;
7627151e 965 req->r_base_oloc.pool = layout->pool_id;
30c156d9 966 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
d30291b9 967 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
dbe0fc41 968
bb873b53
ID		 969 req->r_snapid = vino.snap;
970 if (flags & CEPH_OSD_FLAG_WRITE)
971 req->r_data_offset = off;
972
13d1ad16
ID		 973 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
974 if (r)
975 goto fail;
976
f24e9980 977 return req;
13d1ad16
ID		 978
979fail:
980 ceph_osdc_put_request(req);
981 return ERR_PTR(r);
f24e9980 982}
3d14c5d2 983EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 984
985/*
986 * We keep osd requests in an rbtree, sorted by ->r_tid.
987 */
fcd00b68 988DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
4609245e 989DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
f24e9980 990
0247a0cf
ID		 991static bool osd_homeless(struct ceph_osd *osd)
992{
993 return osd->o_osd == CEPH_HOMELESS_OSD;
994}
995
5aea3dcd 996static bool osd_registered(struct ceph_osd *osd)
f24e9980 997{
5aea3dcd 998 verify_osdc_locked(osd->o_osdc);
f24e9980 999
5aea3dcd 1000 return !RB_EMPTY_NODE(&osd->o_node);
f24e9980
SW		 1001}
1002
0247a0cf
ID		 1003/*
1004 * Assumes @osd is zero-initialized.
1005 */
1006static void osd_init(struct ceph_osd *osd)
1007{
1008 atomic_set(&osd->o_ref, 1);
1009 RB_CLEAR_NODE(&osd->o_node);
5aea3dcd 1010 osd->o_requests = RB_ROOT;
922dab61 1011 osd->o_linger_requests = RB_ROOT;
0247a0cf
ID		 1012 INIT_LIST_HEAD(&osd->o_osd_lru);
1013 INIT_LIST_HEAD(&osd->o_keepalive_item);
1014 osd->o_incarnation = 1;
5aea3dcd 1015 mutex_init(&osd->lock);
0247a0cf
ID		 1016}
1017
1018static void osd_cleanup(struct ceph_osd *osd)
1019{
1020 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
5aea3dcd 1021 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 1022 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
0247a0cf
ID		 1023 WARN_ON(!list_empty(&osd->o_osd_lru));
1024 WARN_ON(!list_empty(&osd->o_keepalive_item));
1025
1026 if (osd->o_auth.authorizer) {
1027 WARN_ON(osd_homeless(osd));
1028 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1029 }
1030}
1031
f24e9980
SW		 1032/*
1033 * Track open sessions with osds.
1034 */
e10006f8 1035static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1036{
1037 struct ceph_osd *osd;
1038
0247a0cf
ID		 1039 WARN_ON(onum == CEPH_HOMELESS_OSD);
1040
7a28f59b 1041 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
0247a0cf 1042 osd_init(osd);
f24e9980 1043 osd->o_osdc = osdc;
e10006f8 1044 osd->o_osd = onum;
f24e9980 1045
b7a9e5dd 1046 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1047
f24e9980
SW		 1048 return osd;
1049}
1050
1051static struct ceph_osd *get_osd(struct ceph_osd *osd)
1052{
1053 if (atomic_inc_not_zero(&osd->o_ref)) {
1054 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1055 atomic_read(&osd->o_ref));
1056 return osd;
1057 } else {
1058 dout("get_osd %p FAIL\n", osd);
1059 return NULL;
1060 }
1061}
1062
1063static void put_osd(struct ceph_osd *osd)
1064{
1065 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1066 atomic_read(&osd->o_ref) - 1);
b28ec2f3 1067 if (atomic_dec_and_test(&osd->o_ref)) {
0247a0cf 1068 osd_cleanup(osd);
f24e9980 1069 kfree(osd);
79494d1b 1070 }
f24e9980
SW		 1071}
1072
fcd00b68
ID		 1073DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1074
9dd2845c 1075static void __move_osd_to_lru(struct ceph_osd *osd)
f5a2041b 1076{
9dd2845c
ID		 1077 struct ceph_osd_client *osdc = osd->o_osdc;
1078
1079 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
f5a2041b 1080 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1081
9dd2845c 1082 spin_lock(&osdc->osd_lru_lock);
f5a2041b 1083 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
9dd2845c
ID		 1084 spin_unlock(&osdc->osd_lru_lock);
1085
a319bf56 1086 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1087}
1088
9dd2845c 1089static void maybe_move_osd_to_lru(struct ceph_osd *osd)
bbf37ec3 1090{
5aea3dcd 1091 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1092 RB_EMPTY_ROOT(&osd->o_linger_requests))
9dd2845c 1093 __move_osd_to_lru(osd);
bbf37ec3
ID		 1094}
1095
f5a2041b
YS		 1096static void __remove_osd_from_lru(struct ceph_osd *osd)
1097{
9dd2845c
ID		 1098 struct ceph_osd_client *osdc = osd->o_osdc;
1099
1100 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1101
1102 spin_lock(&osdc->osd_lru_lock);
f5a2041b
YS		 1103 if (!list_empty(&osd->o_osd_lru))
1104 list_del_init(&osd->o_osd_lru);
9dd2845c 1105 spin_unlock(&osdc->osd_lru_lock);
f5a2041b
YS		 1106}
1107
5aea3dcd
ID		 1108/*
1109 * Close the connection and assign any leftover requests to the
1110 * homeless session.
1111 */
1112static void close_osd(struct ceph_osd *osd)
1113{
1114 struct ceph_osd_client *osdc = osd->o_osdc;
1115 struct rb_node *n;
1116
1117 verify_osdc_wrlocked(osdc);
1118 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1119
1120 ceph_con_close(&osd->o_con);
1121
1122 for (n = rb_first(&osd->o_requests); n; ) {
1123 struct ceph_osd_request *req =
1124 rb_entry(n, struct ceph_osd_request, r_node);
1125
1126 n = rb_next(n); /* unlink_request() */
1127
1128 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1129 unlink_request(osd, req);
1130 link_request(&osdc->homeless_osd, req);
1131 }
922dab61
ID		 1132 for (n = rb_first(&osd->o_linger_requests); n; ) {
1133 struct ceph_osd_linger_request *lreq =
1134 rb_entry(n, struct ceph_osd_linger_request, node);
1135
1136 n = rb_next(n); /* unlink_linger() */
1137
1138 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1139 lreq->linger_id);
1140 unlink_linger(osd, lreq);
1141 link_linger(&osdc->homeless_osd, lreq);
1142 }
5aea3dcd
ID		 1143
1144 __remove_osd_from_lru(osd);
1145 erase_osd(&osdc->osds, osd);
1146 put_osd(osd);
1147}
1148
f24e9980
SW		 1149/*
1150 * reset osd connect
1151 */
5aea3dcd 1152static int reopen_osd(struct ceph_osd *osd)
f24e9980 1153{
c3acb181 1154 struct ceph_entity_addr *peer_addr;
f24e9980 1155
5aea3dcd
ID		 1156 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1157
1158 if (RB_EMPTY_ROOT(&osd->o_requests) &&
922dab61 1159 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
5aea3dcd 1160 close_osd(osd);
c3acb181
AE		 1161 return -ENODEV;
1162 }
1163
5aea3dcd 1164 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
c3acb181
AE		 1165 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1166 !ceph_con_opened(&osd->o_con)) {
5aea3dcd 1167 struct rb_node *n;
c3acb181 1168
0b4af2e8
ID		 1169 dout("osd addr hasn't changed and connection never opened, "
1170 "letting msgr retry\n");
87b315a5 1171 /* touch each r_stamp for handle_timeout()'s benfit */
5aea3dcd
ID		 1172 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1173 struct ceph_osd_request *req =
1174 rb_entry(n, struct ceph_osd_request, r_node);
87b315a5 1175 req->r_stamp = jiffies;
5aea3dcd 1176 }
c3acb181
AE		 1177
1178 return -EAGAIN;
f24e9980 1179 }
c3acb181
AE		 1180
1181 ceph_con_close(&osd->o_con);
1182 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1183 osd->o_incarnation++;
1184
1185 return 0;
f24e9980
SW		 1186}
1187
5aea3dcd
ID		 1188static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1189 bool wrlocked)
f24e9980 1190{
5aea3dcd 1191 struct ceph_osd *osd;
35f9f8a0 1192
5aea3dcd
ID		 1193 if (wrlocked)
1194 verify_osdc_wrlocked(osdc);
1195 else
1196 verify_osdc_locked(osdc);
f24e9980 1197
5aea3dcd
ID		 1198 if (o != CEPH_HOMELESS_OSD)
1199 osd = lookup_osd(&osdc->osds, o);
1200 else
1201 osd = &osdc->homeless_osd;
1202 if (!osd) {
1203 if (!wrlocked)
1204 return ERR_PTR(-EAGAIN);
0ba6478d 1205
5aea3dcd
ID		 1206 osd = create_osd(osdc, o);
1207 insert_osd(&osdc->osds, osd);
1208 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1209 &osdc->osdmap->osd_addr[osd->o_osd]);
0ba6478d 1210 }
f24e9980 1211
5aea3dcd
ID		 1212 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1213 return osd;
f24e9980
SW		 1214}
1215
1216/*
5aea3dcd
ID		 1217 * Create request <-> OSD session relation.
1218 *
1219 * @req has to be assigned a tid, @osd may be homeless.
f24e9980 1220 */
5aea3dcd 1221static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
f24e9980 1222{
5aea3dcd
ID		 1223 verify_osd_locked(osd);
1224 WARN_ON(!req->r_tid || req->r_osd);
1225 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1226 req, req->r_tid);
1227
1228 if (!osd_homeless(osd))
1229 __remove_osd_from_lru(osd);
1230 else
1231 atomic_inc(&osd->o_osdc->num_homeless);
1232
1233 get_osd(osd);
1234 insert_request(&osd->o_requests, req);
1235 req->r_osd = osd;
f24e9980
SW		 1236}
1237
5aea3dcd
ID		 1238static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1239{
1240 verify_osd_locked(osd);
1241 WARN_ON(req->r_osd != osd);
1242 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1243 req, req->r_tid);
1244
1245 req->r_osd = NULL;
1246 erase_request(&osd->o_requests, req);
1247 put_osd(osd);
1248
1249 if (!osd_homeless(osd))
1250 maybe_move_osd_to_lru(osd);
1251 else
1252 atomic_dec(&osd->o_osdc->num_homeless);
1253}
1254
63244fa1
ID		 1255static bool __pool_full(struct ceph_pg_pool_info *pi)
1256{
1257 return pi->flags & CEPH_POOL_FLAG_FULL;
1258}
1259
42c1b124
ID		 1260static bool have_pool_full(struct ceph_osd_client *osdc)
1261{
1262 struct rb_node *n;
1263
1264 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1265 struct ceph_pg_pool_info *pi =
1266 rb_entry(n, struct ceph_pg_pool_info, node);
1267
1268 if (__pool_full(pi))
1269 return true;
1270 }
1271
1272 return false;
1273}
1274
5aea3dcd
ID		 1275static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1276{
1277 struct ceph_pg_pool_info *pi;
1278
1279 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1280 if (!pi)
1281 return false;
1282
1283 return __pool_full(pi);
1284}
1285
d29adb34
JD		 1286/*
1287 * Returns whether a request should be blocked from being sent
1288 * based on the current osdmap and osd_client settings.
d29adb34 1289 */
63244fa1
ID		 1290static bool target_should_be_paused(struct ceph_osd_client *osdc,
1291 const struct ceph_osd_request_target *t,
1292 struct ceph_pg_pool_info *pi)
1293{
b7ec35b3
ID		 1294 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1295 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1296 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
63244fa1
ID		 1297 __pool_full(pi);
1298
1299 WARN_ON(pi->id != t->base_oloc.pool);
1300 return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
1301 (t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
1302}
1303
63244fa1
ID		 1304enum calc_target_result {
1305 CALC_TARGET_NO_ACTION = 0,
1306 CALC_TARGET_NEED_RESEND,
1307 CALC_TARGET_POOL_DNE,
1308};
1309
1310static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1311 struct ceph_osd_request_target *t,
1312 u32 *last_force_resend,
1313 bool any_change)
1314{
1315 struct ceph_pg_pool_info *pi;
1316 struct ceph_pg pgid, last_pgid;
1317 struct ceph_osds up, acting;
1318 bool force_resend = false;
1319 bool need_check_tiering = false;
1320 bool need_resend = false;
b7ec35b3 1321 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
63244fa1
ID		 1322 enum calc_target_result ct_res;
1323 int ret;
1324
1325 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1326 if (!pi) {
1327 t->osd = CEPH_HOMELESS_OSD;
1328 ct_res = CALC_TARGET_POOL_DNE;
1329 goto out;
1330 }
1331
1332 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1333 if (last_force_resend &&
1334 *last_force_resend < pi->last_force_request_resend) {
1335 *last_force_resend = pi->last_force_request_resend;
1336 force_resend = true;
1337 } else if (!last_force_resend) {
1338 force_resend = true;
1339 }
1340 }
1341 if (ceph_oid_empty(&t->target_oid) || force_resend) {
1342 ceph_oid_copy(&t->target_oid, &t->base_oid);
1343 need_check_tiering = true;
1344 }
1345 if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
1346 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1347 need_check_tiering = true;
1348 }
1349
1350 if (need_check_tiering &&
1351 (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1352 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1353 t->target_oloc.pool = pi->read_tier;
1354 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1355 t->target_oloc.pool = pi->write_tier;
1356 }
1357
1358 ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
1359 &t->target_oloc, &pgid);
1360 if (ret) {
1361 WARN_ON(ret != -ENOENT);
1362 t->osd = CEPH_HOMELESS_OSD;
1363 ct_res = CALC_TARGET_POOL_DNE;
1364 goto out;
1365 }
1366 last_pgid.pool = pgid.pool;
1367 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1368
1369 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
1370 if (any_change &&
1371 ceph_is_new_interval(&t->acting,
1372 &acting,
1373 &t->up,
1374 &up,
1375 t->size,
1376 pi->size,
1377 t->min_size,
1378 pi->min_size,
1379 t->pg_num,
1380 pi->pg_num,
1381 t->sort_bitwise,
1382 sort_bitwise,
1383 &last_pgid))
1384 force_resend = true;
1385
1386 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1387 t->paused = false;
1388 need_resend = true;
1389 }
1390
1391 if (ceph_pg_compare(&t->pgid, &pgid) ||
1392 ceph_osds_changed(&t->acting, &acting, any_change) ||
1393 force_resend) {
1394 t->pgid = pgid; /* struct */
1395 ceph_osds_copy(&t->acting, &acting);
1396 ceph_osds_copy(&t->up, &up);
1397 t->size = pi->size;
1398 t->min_size = pi->min_size;
1399 t->pg_num = pi->pg_num;
1400 t->pg_num_mask = pi->pg_num_mask;
1401 t->sort_bitwise = sort_bitwise;
1402
1403 t->osd = acting.primary;
1404 need_resend = true;
1405 }
1406
1407 ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION;
1408out:
1409 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1410 return ct_res;
1411}
1412
bb873b53
ID		 1413static void setup_request_data(struct ceph_osd_request *req,
1414 struct ceph_msg *msg)
f24e9980 1415{
bb873b53
ID		 1416 u32 data_len = 0;
1417 int i;
1418
1419 if (!list_empty(&msg->data))
1420 return;
f24e9980 1421
bb873b53
ID		 1422 WARN_ON(msg->data_length);
1423 for (i = 0; i < req->r_num_ops; i++) {
1424 struct ceph_osd_req_op *op = &req->r_ops[i];
1425
1426 switch (op->op) {
1427 /* request */
1428 case CEPH_OSD_OP_WRITE:
1429 case CEPH_OSD_OP_WRITEFULL:
1430 WARN_ON(op->indata_len != op->extent.length);
1431 ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1432 break;
1433 case CEPH_OSD_OP_SETXATTR:
1434 case CEPH_OSD_OP_CMPXATTR:
1435 WARN_ON(op->indata_len != op->xattr.name_len +
1436 op->xattr.value_len);
1437 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1438 break;
922dab61
ID		 1439 case CEPH_OSD_OP_NOTIFY_ACK:
1440 ceph_osdc_msg_data_add(msg,
1441 &op->notify_ack.request_data);
1442 break;
bb873b53
ID		 1443
1444 /* reply */
1445 case CEPH_OSD_OP_STAT:
1446 ceph_osdc_msg_data_add(req->r_reply,
1447 &op->raw_data_in);
1448 break;
1449 case CEPH_OSD_OP_READ:
1450 ceph_osdc_msg_data_add(req->r_reply,
1451 &op->extent.osd_data);
1452 break;
a4ed38d7
DF		 1453 case CEPH_OSD_OP_LIST_WATCHERS:
1454 ceph_osdc_msg_data_add(req->r_reply,
1455 &op->list_watchers.response_data);
1456 break;
bb873b53
ID		 1457
1458 /* both */
1459 case CEPH_OSD_OP_CALL:
1460 WARN_ON(op->indata_len != op->cls.class_len +
1461 op->cls.method_len +
1462 op->cls.indata_len);
1463 ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1464 /* optional, can be NONE */
1465 ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1466 /* optional, can be NONE */
1467 ceph_osdc_msg_data_add(req->r_reply,
1468 &op->cls.response_data);
1469 break;
19079203
ID		 1470 case CEPH_OSD_OP_NOTIFY:
1471 ceph_osdc_msg_data_add(msg,
1472 &op->notify.request_data);
1473 ceph_osdc_msg_data_add(req->r_reply,
1474 &op->notify.response_data);
1475 break;
bb873b53
ID		 1476 }
1477
1478 data_len += op->indata_len;
1479 }
1b83bef2 1480
bb873b53
ID		 1481 WARN_ON(data_len != msg->data_length);
1482}
1483
1484static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
1485{
1486 void *p = msg->front.iov_base;
1487 void *const end = p + msg->front_alloc_len;
1488 u32 data_len = 0;
1489 int i;
1490
1491 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1492 /* snapshots aren't writeable */
1493 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1494 } else {
1495 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1496 req->r_data_offset || req->r_snapc);
1497 }
1498
1499 setup_request_data(req, msg);
1500
1501 ceph_encode_32(&p, 1); /* client_inc, always 1 */
1502 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1503 ceph_encode_32(&p, req->r_flags);
1504 ceph_encode_timespec(p, &req->r_mtime);
1505 p += sizeof(struct ceph_timespec);
1506 /* aka reassert_version */
1507 memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version));
1508 p += sizeof(req->r_replay_version);
1509
1510 /* oloc */
30c156d9
YZ		 1511 ceph_start_encoding(&p, 5, 4,
1512 ceph_oloc_encoding_size(&req->r_t.target_oloc));
bb873b53
ID		 1513 ceph_encode_64(&p, req->r_t.target_oloc.pool);
1514 ceph_encode_32(&p, -1); /* preferred */
1515 ceph_encode_32(&p, 0); /* key len */
30c156d9
YZ		 1516 if (req->r_t.target_oloc.pool_ns)
1517 ceph_encode_string(&p, end, req->r_t.target_oloc.pool_ns->str,
1518 req->r_t.target_oloc.pool_ns->len);
1519 else
1520 ceph_encode_32(&p, 0);
bb873b53
ID		 1521
1522 /* pgid */
1523 ceph_encode_8(&p, 1);
a66dd383
ID		 1524 ceph_encode_64(&p, req->r_t.pgid.pool);
1525 ceph_encode_32(&p, req->r_t.pgid.seed);
bb873b53 1526 ceph_encode_32(&p, -1); /* preferred */
2169aea6 1527
bb873b53
ID		 1528 /* oid */
1529 ceph_encode_32(&p, req->r_t.target_oid.name_len);
1530 memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len);
1531 p += req->r_t.target_oid.name_len;
f24e9980 1532
bb873b53
ID		 1533 /* ops, can imply data */
1534 ceph_encode_16(&p, req->r_num_ops);
1535 for (i = 0; i < req->r_num_ops; i++) {
1536 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1537 p += sizeof(struct ceph_osd_op);
1538 }
26be8808 1539
bb873b53
ID		 1540 ceph_encode_64(&p, req->r_snapid); /* snapid */
1541 if (req->r_snapc) {
1542 ceph_encode_64(&p, req->r_snapc->seq);
1543 ceph_encode_32(&p, req->r_snapc->num_snaps);
1544 for (i = 0; i < req->r_snapc->num_snaps; i++)
1545 ceph_encode_64(&p, req->r_snapc->snaps[i]);
1546 } else {
1547 ceph_encode_64(&p, 0); /* snap_seq */
1548 ceph_encode_32(&p, 0); /* snaps len */
1549 }
1550
1551 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
1552
1553 BUG_ON(p > end);
1554 msg->front.iov_len = p - msg->front.iov_base;
1555 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
1556 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
1557 msg->hdr.data_len = cpu_to_le32(data_len);
1558 /*
1559 * The header "data_off" is a hint to the receiver allowing it
1560 * to align received data into its buffers such that there's no
1561 * need to re-copy it before writing it to disk (direct I/O).
1562 */
1563 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
26be8808 1564
4a3262b1
ID		 1565 dout("%s req %p oid %s oid_len %d front %zu data %u\n", __func__,
1566 req, req->r_t.target_oid.name, req->r_t.target_oid.name_len,
1567 msg->front.iov_len, data_len);
bb873b53
ID		 1568}
1569
1570/*
1571 * @req has to be assigned a tid and registered.
1572 */
1573static void send_request(struct ceph_osd_request *req)
1574{
1575 struct ceph_osd *osd = req->r_osd;
1576
5aea3dcd 1577 verify_osd_locked(osd);
bb873b53
ID		 1578 WARN_ON(osd->o_osd != req->r_t.osd);
1579
5aea3dcd
ID		 1580 /*
1581 * We may have a previously queued request message hanging
1582 * around. Cancel it to avoid corrupting the msgr.
1583 */
1584 if (req->r_sent)
1585 ceph_msg_revoke(req->r_request);
1586
bb873b53
ID		 1587 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
1588 if (req->r_attempts)
1589 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1590 else
1591 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
1592
1593 encode_request(req, req->r_request);
1594
1595 dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n",
1596 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
1597 req->r_t.osd, req->r_flags, req->r_attempts);
1598
1599 req->r_t.paused = false;
1600 req->r_stamp = jiffies;
1601 req->r_attempts++;
1602
1603 req->r_sent = osd->o_incarnation;
1604 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1605 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
f24e9980
SW		 1606}
1607
42c1b124
ID		 1608static void maybe_request_map(struct ceph_osd_client *osdc)
1609{
1610 bool continuous = false;
1611
5aea3dcd 1612 verify_osdc_locked(osdc);
42c1b124
ID		 1613 WARN_ON(!osdc->osdmap->epoch);
1614
b7ec35b3
ID		 1615 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1616 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
1617 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
42c1b124
ID		 1618 dout("%s osdc %p continuous\n", __func__, osdc);
1619 continuous = true;
1620 } else {
1621 dout("%s osdc %p onetime\n", __func__, osdc);
1622 }
1623
1624 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
1625 osdc->osdmap->epoch + 1, continuous))
1626 ceph_monc_renew_subs(&osdc->client->monc);
1627}
1628
4609245e
ID		 1629static void send_map_check(struct ceph_osd_request *req);
1630
5aea3dcd 1631static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
0bbfdfe8 1632{
5aea3dcd
ID		 1633 struct ceph_osd_client *osdc = req->r_osdc;
1634 struct ceph_osd *osd;
4609245e 1635 enum calc_target_result ct_res;
5aea3dcd
ID		 1636 bool need_send = false;
1637 bool promoted = false;
0bbfdfe8 1638
5aea3dcd
ID		 1639 WARN_ON(req->r_tid || req->r_got_reply);
1640 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
1641
1642again:
4609245e
ID		 1643 ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, false);
1644 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
1645 goto promote;
1646
5aea3dcd
ID		 1647 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
1648 if (IS_ERR(osd)) {
1649 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
1650 goto promote;
0bbfdfe8
ID		 1651 }
1652
5aea3dcd 1653 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
b7ec35b3 1654 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
5aea3dcd
ID		 1655 dout("req %p pausewr\n", req);
1656 req->r_t.paused = true;
1657 maybe_request_map(osdc);
1658 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
b7ec35b3 1659 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
5aea3dcd
ID		 1660 dout("req %p pauserd\n", req);
1661 req->r_t.paused = true;
1662 maybe_request_map(osdc);
1663 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1664 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
1665 CEPH_OSD_FLAG_FULL_FORCE)) &&
b7ec35b3 1666 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
5aea3dcd
ID		 1667 pool_full(osdc, req->r_t.base_oloc.pool))) {
1668 dout("req %p full/pool_full\n", req);
1669 pr_warn_ratelimited("FULL or reached pool quota\n");
1670 req->r_t.paused = true;
1671 maybe_request_map(osdc);
1672 } else if (!osd_homeless(osd)) {
1673 need_send = true;
0bbfdfe8 1674 } else {
5aea3dcd 1675 maybe_request_map(osdc);
0bbfdfe8
ID		 1676 }
1677
5aea3dcd
ID		 1678 mutex_lock(&osd->lock);
1679 /*
1680 * Assign the tid atomically with send_request() to protect
1681 * multiple writes to the same object from racing with each
1682 * other, resulting in out of order ops on the OSDs.
1683 */
1684 req->r_tid = atomic64_inc_return(&osdc->last_tid);
1685 link_request(osd, req);
1686 if (need_send)
1687 send_request(req);
1688 mutex_unlock(&osd->lock);
1689
4609245e
ID		 1690 if (ct_res == CALC_TARGET_POOL_DNE)
1691 send_map_check(req);
1692
5aea3dcd
ID		 1693 if (promoted)
1694 downgrade_write(&osdc->lock);
1695 return;
1696
1697promote:
1698 up_read(&osdc->lock);
1699 down_write(&osdc->lock);
1700 wrlocked = true;
1701 promoted = true;
1702 goto again;
1703}
1704
1705static void account_request(struct ceph_osd_request *req)
1706{
1707 unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK;
1708
1709 if (req->r_flags & CEPH_OSD_FLAG_READ) {
1710 WARN_ON(req->r_flags & mask);
1711 req->r_flags |= CEPH_OSD_FLAG_ACK;
1712 } else if (req->r_flags & CEPH_OSD_FLAG_WRITE)
1713 WARN_ON(!(req->r_flags & mask));
1714 else
1715 WARN_ON(1);
1716
1717 WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask);
1718 atomic_inc(&req->r_osdc->num_requests);
1719}
1720
1721static void submit_request(struct ceph_osd_request *req, bool wrlocked)
1722{
1723 ceph_osdc_get_request(req);
1724 account_request(req);
1725 __submit_request(req, wrlocked);
1726}
1727
45ee2c1d 1728static void finish_request(struct ceph_osd_request *req)
5aea3dcd
ID		 1729{
1730 struct ceph_osd_client *osdc = req->r_osdc;
1731 struct ceph_osd *osd = req->r_osd;
1732
1733 verify_osd_locked(osd);
1734 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
1735
4609245e 1736 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
5aea3dcd
ID		 1737 unlink_request(osd, req);
1738 atomic_dec(&osdc->num_requests);
1739
1740 /*
1741 * If an OSD has failed or returned and a request has been sent
1742 * twice, it's possible to get a reply and end up here while the
1743 * request message is queued for delivery. We will ignore the
1744 * reply, so not a big deal, but better to try and catch it.
1745 */
1746 ceph_msg_revoke(req->r_request);
1747 ceph_msg_revoke_incoming(req->r_reply);
1748}
1749
fe5da05e
ID		 1750static void __complete_request(struct ceph_osd_request *req)
1751{
1752 if (req->r_callback)
1753 req->r_callback(req);
1754 else
1755 complete_all(&req->r_completion);
1756}
1757
4609245e
ID		 1758/*
1759 * Note that this is open-coded in handle_reply(), which has to deal
1760 * with ack vs commit, dup acks, etc.
1761 */
1762static void complete_request(struct ceph_osd_request *req, int err)
1763{
1764 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
1765
1766 req->r_result = err;
45ee2c1d 1767 finish_request(req);
4609245e 1768 __complete_request(req);
c297eb42 1769 complete_all(&req->r_done_completion);
4609245e
ID		 1770 ceph_osdc_put_request(req);
1771}
1772
1773static void cancel_map_check(struct ceph_osd_request *req)
1774{
1775 struct ceph_osd_client *osdc = req->r_osdc;
1776 struct ceph_osd_request *lookup_req;
1777
1778 verify_osdc_wrlocked(osdc);
1779
1780 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
1781 if (!lookup_req)
1782 return;
1783
1784 WARN_ON(lookup_req != req);
1785 erase_request_mc(&osdc->map_checks, req);
1786 ceph_osdc_put_request(req);
1787}
1788
5aea3dcd
ID		 1789static void cancel_request(struct ceph_osd_request *req)
1790{
1791 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
1792
4609245e 1793 cancel_map_check(req);
45ee2c1d 1794 finish_request(req);
c297eb42
ID		 1795 complete_all(&req->r_done_completion);
1796 ceph_osdc_put_request(req);
5aea3dcd
ID		 1797}
1798
4609245e
ID		 1799static void check_pool_dne(struct ceph_osd_request *req)
1800{
1801 struct ceph_osd_client *osdc = req->r_osdc;
1802 struct ceph_osdmap *map = osdc->osdmap;
1803
1804 verify_osdc_wrlocked(osdc);
1805 WARN_ON(!map->epoch);
1806
1807 if (req->r_attempts) {
1808 /*
1809 * We sent a request earlier, which means that
1810 * previously the pool existed, and now it does not
1811 * (i.e., it was deleted).
1812 */
1813 req->r_map_dne_bound = map->epoch;
1814 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
1815 req->r_tid);
1816 } else {
1817 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
1818 req, req->r_tid, req->r_map_dne_bound, map->epoch);
1819 }
1820
1821 if (req->r_map_dne_bound) {
1822 if (map->epoch >= req->r_map_dne_bound) {
1823 /* we had a new enough map */
1824 pr_info_ratelimited("tid %llu pool does not exist\n",
1825 req->r_tid);
1826 complete_request(req, -ENOENT);
1827 }
1828 } else {
1829 send_map_check(req);
1830 }
1831}
1832
1833static void map_check_cb(struct ceph_mon_generic_request *greq)
1834{
1835 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
1836 struct ceph_osd_request *req;
1837 u64 tid = greq->private_data;
1838
1839 WARN_ON(greq->result || !greq->u.newest);
1840
1841 down_write(&osdc->lock);
1842 req = lookup_request_mc(&osdc->map_checks, tid);
1843 if (!req) {
1844 dout("%s tid %llu dne\n", __func__, tid);
1845 goto out_unlock;
1846 }
1847
1848 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
1849 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
1850 if (!req->r_map_dne_bound)
1851 req->r_map_dne_bound = greq->u.newest;
1852 erase_request_mc(&osdc->map_checks, req);
1853 check_pool_dne(req);
1854
1855 ceph_osdc_put_request(req);
1856out_unlock:
1857 up_write(&osdc->lock);
1858}
1859
1860static void send_map_check(struct ceph_osd_request *req)
1861{
1862 struct ceph_osd_client *osdc = req->r_osdc;
1863 struct ceph_osd_request *lookup_req;
1864 int ret;
1865
1866 verify_osdc_wrlocked(osdc);
1867
1868 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
1869 if (lookup_req) {
1870 WARN_ON(lookup_req != req);
1871 return;
1872 }
1873
1874 ceph_osdc_get_request(req);
1875 insert_request_mc(&osdc->map_checks, req);
1876 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
1877 map_check_cb, req->r_tid);
1878 WARN_ON(ret);
1879}
1880
922dab61
ID		 1881/*
1882 * lingering requests, watch/notify v2 infrastructure
1883 */
1884static void linger_release(struct kref *kref)
1885{
1886 struct ceph_osd_linger_request *lreq =
1887 container_of(kref, struct ceph_osd_linger_request, kref);
1888
1889 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
1890 lreq->reg_req, lreq->ping_req);
1891 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
1892 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
4609245e 1893 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
922dab61 1894 WARN_ON(!list_empty(&lreq->scan_item));
b07d3c4b 1895 WARN_ON(!list_empty(&lreq->pending_lworks));
922dab61
ID		 1896 WARN_ON(lreq->osd);
1897
1898 if (lreq->reg_req)
1899 ceph_osdc_put_request(lreq->reg_req);
1900 if (lreq->ping_req)
1901 ceph_osdc_put_request(lreq->ping_req);
1902 target_destroy(&lreq->t);
1903 kfree(lreq);
1904}
1905
1906static void linger_put(struct ceph_osd_linger_request *lreq)
1907{
1908 if (lreq)
1909 kref_put(&lreq->kref, linger_release);
1910}
1911
1912static struct ceph_osd_linger_request *
1913linger_get(struct ceph_osd_linger_request *lreq)
1914{
1915 kref_get(&lreq->kref);
1916 return lreq;
1917}
1918
1919static struct ceph_osd_linger_request *
1920linger_alloc(struct ceph_osd_client *osdc)
1921{
1922 struct ceph_osd_linger_request *lreq;
1923
1924 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
1925 if (!lreq)
1926 return NULL;
1927
1928 kref_init(&lreq->kref);
1929 mutex_init(&lreq->lock);
1930 RB_CLEAR_NODE(&lreq->node);
1931 RB_CLEAR_NODE(&lreq->osdc_node);
4609245e 1932 RB_CLEAR_NODE(&lreq->mc_node);
922dab61 1933 INIT_LIST_HEAD(&lreq->scan_item);
b07d3c4b 1934 INIT_LIST_HEAD(&lreq->pending_lworks);
922dab61 1935 init_completion(&lreq->reg_commit_wait);
19079203 1936 init_completion(&lreq->notify_finish_wait);
922dab61
ID		 1937
1938 lreq->osdc = osdc;
1939 target_init(&lreq->t);
1940
1941 dout("%s lreq %p\n", __func__, lreq);
1942 return lreq;
1943}
1944
1945DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
1946DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
4609245e 1947DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
922dab61
ID		 1948
1949/*
1950 * Create linger request <-> OSD session relation.
1951 *
1952 * @lreq has to be registered, @osd may be homeless.
1953 */
1954static void link_linger(struct ceph_osd *osd,
1955 struct ceph_osd_linger_request *lreq)
1956{
1957 verify_osd_locked(osd);
1958 WARN_ON(!lreq->linger_id || lreq->osd);
1959 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
1960 osd->o_osd, lreq, lreq->linger_id);
1961
1962 if (!osd_homeless(osd))
1963 __remove_osd_from_lru(osd);
1964 else
1965 atomic_inc(&osd->o_osdc->num_homeless);
1966
1967 get_osd(osd);
1968 insert_linger(&osd->o_linger_requests, lreq);
1969 lreq->osd = osd;
1970}
1971
1972static void unlink_linger(struct ceph_osd *osd,
1973 struct ceph_osd_linger_request *lreq)
1974{
1975 verify_osd_locked(osd);
1976 WARN_ON(lreq->osd != osd);
1977 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
1978 osd->o_osd, lreq, lreq->linger_id);
1979
1980 lreq->osd = NULL;
1981 erase_linger(&osd->o_linger_requests, lreq);
1982 put_osd(osd);
1983
1984 if (!osd_homeless(osd))
1985 maybe_move_osd_to_lru(osd);
1986 else
1987 atomic_dec(&osd->o_osdc->num_homeless);
1988}
1989
1990static bool __linger_registered(struct ceph_osd_linger_request *lreq)
1991{
1992 verify_osdc_locked(lreq->osdc);
1993
1994 return !RB_EMPTY_NODE(&lreq->osdc_node);
1995}
1996
1997static bool linger_registered(struct ceph_osd_linger_request *lreq)
1998{
1999 struct ceph_osd_client *osdc = lreq->osdc;
2000 bool registered;
2001
2002 down_read(&osdc->lock);
2003 registered = __linger_registered(lreq);
2004 up_read(&osdc->lock);
2005
2006 return registered;
2007}
2008
2009static void linger_register(struct ceph_osd_linger_request *lreq)
2010{
2011 struct ceph_osd_client *osdc = lreq->osdc;
2012
2013 verify_osdc_wrlocked(osdc);
2014 WARN_ON(lreq->linger_id);
2015
2016 linger_get(lreq);
2017 lreq->linger_id = ++osdc->last_linger_id;
2018 insert_linger_osdc(&osdc->linger_requests, lreq);
2019}
2020
2021static void linger_unregister(struct ceph_osd_linger_request *lreq)
2022{
2023 struct ceph_osd_client *osdc = lreq->osdc;
2024
2025 verify_osdc_wrlocked(osdc);
2026
2027 erase_linger_osdc(&osdc->linger_requests, lreq);
2028 linger_put(lreq);
2029}
2030
2031static void cancel_linger_request(struct ceph_osd_request *req)
2032{
2033 struct ceph_osd_linger_request *lreq = req->r_priv;
2034
2035 WARN_ON(!req->r_linger);
2036 cancel_request(req);
2037 linger_put(lreq);
2038}
2039
2040struct linger_work {
2041 struct work_struct work;
2042 struct ceph_osd_linger_request *lreq;
b07d3c4b
ID		 2043 struct list_head pending_item;
2044 unsigned long queued_stamp;
922dab61
ID		 2045
2046 union {
2047 struct {
2048 u64 notify_id;
2049 u64 notifier_id;
2050 void *payload; /* points into @msg front */
2051 size_t payload_len;
2052
2053 struct ceph_msg *msg; /* for ceph_msg_put() */
2054 } notify;
2055 struct {
2056 int err;
2057 } error;
2058 };
2059};
2060
2061static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2062 work_func_t workfn)
2063{
2064 struct linger_work *lwork;
2065
2066 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2067 if (!lwork)
2068 return NULL;
2069
2070 INIT_WORK(&lwork->work, workfn);
b07d3c4b 2071 INIT_LIST_HEAD(&lwork->pending_item);
922dab61
ID		 2072 lwork->lreq = linger_get(lreq);
2073
2074 return lwork;
2075}
2076
2077static void lwork_free(struct linger_work *lwork)
2078{
2079 struct ceph_osd_linger_request *lreq = lwork->lreq;
2080
b07d3c4b
ID		 2081 mutex_lock(&lreq->lock);
2082 list_del(&lwork->pending_item);
2083 mutex_unlock(&lreq->lock);
2084
922dab61
ID		 2085 linger_put(lreq);
2086 kfree(lwork);
2087}
2088
2089static void lwork_queue(struct linger_work *lwork)
2090{
2091 struct ceph_osd_linger_request *lreq = lwork->lreq;
2092 struct ceph_osd_client *osdc = lreq->osdc;
2093
2094 verify_lreq_locked(lreq);
b07d3c4b
ID		 2095 WARN_ON(!list_empty(&lwork->pending_item));
2096
2097 lwork->queued_stamp = jiffies;
2098 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
922dab61
ID		 2099 queue_work(osdc->notify_wq, &lwork->work);
2100}
2101
2102static void do_watch_notify(struct work_struct *w)
2103{
2104 struct linger_work *lwork = container_of(w, struct linger_work, work);
2105 struct ceph_osd_linger_request *lreq = lwork->lreq;
2106
2107 if (!linger_registered(lreq)) {
2108 dout("%s lreq %p not registered\n", __func__, lreq);
2109 goto out;
2110 }
2111
19079203 2112 WARN_ON(!lreq->is_watch);
922dab61
ID		 2113 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2114 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2115 lwork->notify.payload_len);
2116 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2117 lwork->notify.notifier_id, lwork->notify.payload,
2118 lwork->notify.payload_len);
2119
2120out:
2121 ceph_msg_put(lwork->notify.msg);
2122 lwork_free(lwork);
2123}
2124
2125static void do_watch_error(struct work_struct *w)
2126{
2127 struct linger_work *lwork = container_of(w, struct linger_work, work);
2128 struct ceph_osd_linger_request *lreq = lwork->lreq;
2129
2130 if (!linger_registered(lreq)) {
2131 dout("%s lreq %p not registered\n", __func__, lreq);
2132 goto out;
2133 }
2134
2135 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2136 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2137
2138out:
2139 lwork_free(lwork);
2140}
2141
2142static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2143{
2144 struct linger_work *lwork;
2145
2146 lwork = lwork_alloc(lreq, do_watch_error);
2147 if (!lwork) {
2148 pr_err("failed to allocate error-lwork\n");
2149 return;
2150 }
2151
2152 lwork->error.err = lreq->last_error;
2153 lwork_queue(lwork);
2154}
2155
2156static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2157 int result)
2158{
2159 if (!completion_done(&lreq->reg_commit_wait)) {
2160 lreq->reg_commit_error = (result <= 0 ? result : 0);
2161 complete_all(&lreq->reg_commit_wait);
2162 }
2163}
2164
2165static void linger_commit_cb(struct ceph_osd_request *req)
2166{
2167 struct ceph_osd_linger_request *lreq = req->r_priv;
2168
2169 mutex_lock(&lreq->lock);
2170 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2171 lreq->linger_id, req->r_result);
2172 WARN_ON(!__linger_registered(lreq));
2173 linger_reg_commit_complete(lreq, req->r_result);
2174 lreq->committed = true;
2175
19079203
ID		 2176 if (!lreq->is_watch) {
2177 struct ceph_osd_data *osd_data =
2178 osd_req_op_data(req, 0, notify, response_data);
2179 void *p = page_address(osd_data->pages[0]);
2180
2181 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2182 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2183
2184 /* make note of the notify_id */
2185 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2186 lreq->notify_id = ceph_decode_64(&p);
2187 dout("lreq %p notify_id %llu\n", lreq,
2188 lreq->notify_id);
2189 } else {
2190 dout("lreq %p no notify_id\n", lreq);
2191 }
2192 }
2193
922dab61
ID		 2194 mutex_unlock(&lreq->lock);
2195 linger_put(lreq);
2196}
2197
2198static int normalize_watch_error(int err)
2199{
2200 /*
2201 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2202 * notification and a failure to reconnect because we raced with
2203 * the delete appear the same to the user.
2204 */
2205 if (err == -ENOENT)
2206 err = -ENOTCONN;
2207
2208 return err;
2209}
2210
2211static void linger_reconnect_cb(struct ceph_osd_request *req)
2212{
2213 struct ceph_osd_linger_request *lreq = req->r_priv;
2214
2215 mutex_lock(&lreq->lock);
2216 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2217 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2218 if (req->r_result < 0) {
2219 if (!lreq->last_error) {
2220 lreq->last_error = normalize_watch_error(req->r_result);
2221 queue_watch_error(lreq);
2222 }
2223 }
2224
2225 mutex_unlock(&lreq->lock);
2226 linger_put(lreq);
2227}
2228
2229static void send_linger(struct ceph_osd_linger_request *lreq)
2230{
2231 struct ceph_osd_request *req = lreq->reg_req;
2232 struct ceph_osd_req_op *op = &req->r_ops[0];
2233
2234 verify_osdc_wrlocked(req->r_osdc);
2235 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2236
2237 if (req->r_osd)
2238 cancel_linger_request(req);
2239
2240 request_reinit(req);
2241 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2242 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2243 req->r_flags = lreq->t.flags;
2244 req->r_mtime = lreq->mtime;
2245
2246 mutex_lock(&lreq->lock);
19079203 2247 if (lreq->is_watch && lreq->committed) {
922dab61
ID		 2248 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2249 op->watch.cookie != lreq->linger_id);
2250 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2251 op->watch.gen = ++lreq->register_gen;
2252 dout("lreq %p reconnect register_gen %u\n", lreq,
2253 op->watch.gen);
2254 req->r_callback = linger_reconnect_cb;
2255 } else {
19079203
ID		 2256 if (!lreq->is_watch)
2257 lreq->notify_id = 0;
2258 else
2259 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 2260 dout("lreq %p register\n", lreq);
2261 req->r_callback = linger_commit_cb;
2262 }
2263 mutex_unlock(&lreq->lock);
2264
2265 req->r_priv = linger_get(lreq);
2266 req->r_linger = true;
2267
2268 submit_request(req, true);
2269}
2270
2271static void linger_ping_cb(struct ceph_osd_request *req)
2272{
2273 struct ceph_osd_linger_request *lreq = req->r_priv;
2274
2275 mutex_lock(&lreq->lock);
2276 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
2277 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
2278 lreq->last_error);
2279 if (lreq->register_gen == req->r_ops[0].watch.gen) {
b07d3c4b
ID		 2280 if (!req->r_result) {
2281 lreq->watch_valid_thru = lreq->ping_sent;
2282 } else if (!lreq->last_error) {
922dab61
ID		 2283 lreq->last_error = normalize_watch_error(req->r_result);
2284 queue_watch_error(lreq);
2285 }
2286 } else {
2287 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
2288 lreq->register_gen, req->r_ops[0].watch.gen);
2289 }
2290
2291 mutex_unlock(&lreq->lock);
2292 linger_put(lreq);
2293}
2294
2295static void send_linger_ping(struct ceph_osd_linger_request *lreq)
2296{
2297 struct ceph_osd_client *osdc = lreq->osdc;
2298 struct ceph_osd_request *req = lreq->ping_req;
2299 struct ceph_osd_req_op *op = &req->r_ops[0];
2300
b7ec35b3 2301 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
922dab61
ID		 2302 dout("%s PAUSERD\n", __func__);
2303 return;
2304 }
2305
2306 lreq->ping_sent = jiffies;
2307 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
2308 __func__, lreq, lreq->linger_id, lreq->ping_sent,
2309 lreq->register_gen);
2310
2311 if (req->r_osd)
2312 cancel_linger_request(req);
2313
2314 request_reinit(req);
2315 target_copy(&req->r_t, &lreq->t);
2316
2317 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2318 op->watch.cookie != lreq->linger_id ||
2319 op->watch.op != CEPH_OSD_WATCH_OP_PING);
2320 op->watch.gen = lreq->register_gen;
2321 req->r_callback = linger_ping_cb;
2322 req->r_priv = linger_get(lreq);
2323 req->r_linger = true;
2324
2325 ceph_osdc_get_request(req);
2326 account_request(req);
2327 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2328 link_request(lreq->osd, req);
2329 send_request(req);
2330}
2331
2332static void linger_submit(struct ceph_osd_linger_request *lreq)
2333{
2334 struct ceph_osd_client *osdc = lreq->osdc;
2335 struct ceph_osd *osd;
2336
2337 calc_target(osdc, &lreq->t, &lreq->last_force_resend, false);
2338 osd = lookup_create_osd(osdc, lreq->t.osd, true);
2339 link_linger(osd, lreq);
2340
2341 send_linger(lreq);
2342}
2343
4609245e
ID		 2344static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
2345{
2346 struct ceph_osd_client *osdc = lreq->osdc;
2347 struct ceph_osd_linger_request *lookup_lreq;
2348
2349 verify_osdc_wrlocked(osdc);
2350
2351 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2352 lreq->linger_id);
2353 if (!lookup_lreq)
2354 return;
2355
2356 WARN_ON(lookup_lreq != lreq);
2357 erase_linger_mc(&osdc->linger_map_checks, lreq);
2358 linger_put(lreq);
2359}
2360
922dab61
ID		 2361/*
2362 * @lreq has to be both registered and linked.
2363 */
2364static void __linger_cancel(struct ceph_osd_linger_request *lreq)
2365{
19079203 2366 if (lreq->is_watch && lreq->ping_req->r_osd)
922dab61
ID		 2367 cancel_linger_request(lreq->ping_req);
2368 if (lreq->reg_req->r_osd)
2369 cancel_linger_request(lreq->reg_req);
4609245e 2370 cancel_linger_map_check(lreq);
922dab61
ID		 2371 unlink_linger(lreq->osd, lreq);
2372 linger_unregister(lreq);
2373}
2374
2375static void linger_cancel(struct ceph_osd_linger_request *lreq)
2376{
2377 struct ceph_osd_client *osdc = lreq->osdc;
2378
2379 down_write(&osdc->lock);
2380 if (__linger_registered(lreq))
2381 __linger_cancel(lreq);
2382 up_write(&osdc->lock);
2383}
2384
4609245e
ID		 2385static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
2386
2387static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
2388{
2389 struct ceph_osd_client *osdc = lreq->osdc;
2390 struct ceph_osdmap *map = osdc->osdmap;
2391
2392 verify_osdc_wrlocked(osdc);
2393 WARN_ON(!map->epoch);
2394
2395 if (lreq->register_gen) {
2396 lreq->map_dne_bound = map->epoch;
2397 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
2398 lreq, lreq->linger_id);
2399 } else {
2400 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
2401 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
2402 map->epoch);
2403 }
2404
2405 if (lreq->map_dne_bound) {
2406 if (map->epoch >= lreq->map_dne_bound) {
2407 /* we had a new enough map */
2408 pr_info("linger_id %llu pool does not exist\n",
2409 lreq->linger_id);
2410 linger_reg_commit_complete(lreq, -ENOENT);
2411 __linger_cancel(lreq);
2412 }
2413 } else {
2414 send_linger_map_check(lreq);
2415 }
2416}
2417
2418static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
2419{
2420 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2421 struct ceph_osd_linger_request *lreq;
2422 u64 linger_id = greq->private_data;
2423
2424 WARN_ON(greq->result || !greq->u.newest);
2425
2426 down_write(&osdc->lock);
2427 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
2428 if (!lreq) {
2429 dout("%s linger_id %llu dne\n", __func__, linger_id);
2430 goto out_unlock;
2431 }
2432
2433 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
2434 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
2435 greq->u.newest);
2436 if (!lreq->map_dne_bound)
2437 lreq->map_dne_bound = greq->u.newest;
2438 erase_linger_mc(&osdc->linger_map_checks, lreq);
2439 check_linger_pool_dne(lreq);
2440
2441 linger_put(lreq);
2442out_unlock:
2443 up_write(&osdc->lock);
2444}
2445
2446static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
2447{
2448 struct ceph_osd_client *osdc = lreq->osdc;
2449 struct ceph_osd_linger_request *lookup_lreq;
2450 int ret;
2451
2452 verify_osdc_wrlocked(osdc);
2453
2454 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2455 lreq->linger_id);
2456 if (lookup_lreq) {
2457 WARN_ON(lookup_lreq != lreq);
2458 return;
2459 }
2460
2461 linger_get(lreq);
2462 insert_linger_mc(&osdc->linger_map_checks, lreq);
2463 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2464 linger_map_check_cb, lreq->linger_id);
2465 WARN_ON(ret);
2466}
2467
922dab61
ID		 2468static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
2469{
2470 int ret;
2471
2472 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2473 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
2474 return ret ?: lreq->reg_commit_error;
2475}
2476
19079203
ID		 2477static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
2478{
2479 int ret;
2480
2481 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2482 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
2483 return ret ?: lreq->notify_finish_error;
2484}
2485
f24e9980 2486/*
fbca9635
ID		 2487 * Timeout callback, called every N seconds. When 1 or more OSD
2488 * requests has been active for more than N seconds, we send a keepalive
2489 * (tag + timestamp) to its OSD to ensure any communications channel
2490 * reset is detected.
f24e9980
SW		 2491 */
2492static void handle_timeout(struct work_struct *work)
2493{
2494 struct ceph_osd_client *osdc =
2495 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 2496 struct ceph_options *opts = osdc->client->options;
5aea3dcd
ID		 2497 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
2498 LIST_HEAD(slow_osds);
2499 struct rb_node *n, *p;
f24e9980 2500
5aea3dcd
ID		 2501 dout("%s osdc %p\n", __func__, osdc);
2502 down_write(&osdc->lock);
f24e9980 2503
422d2cb8
YS		 2504 /*
2505 * ping osds that are a bit slow. this ensures that if there
2506 * is a break in the TCP connection we will notice, and reopen
2507 * a connection with that osd (from the fault callback).
2508 */
5aea3dcd
ID		 2509 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2510 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2511 bool found = false;
2512
2513 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
2514 struct ceph_osd_request *req =
2515 rb_entry(p, struct ceph_osd_request, r_node);
2516
2517 if (time_before(req->r_stamp, cutoff)) {
2518 dout(" req %p tid %llu on osd%d is laggy\n",
2519 req, req->r_tid, osd->o_osd);
2520 found = true;
2521 }
2522 }
922dab61
ID		 2523 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
2524 struct ceph_osd_linger_request *lreq =
2525 rb_entry(p, struct ceph_osd_linger_request, node);
2526
2527 dout(" lreq %p linger_id %llu is served by osd%d\n",
2528 lreq, lreq->linger_id, osd->o_osd);
2529 found = true;
2530
2531 mutex_lock(&lreq->lock);
19079203 2532 if (lreq->is_watch && lreq->committed && !lreq->last_error)
922dab61
ID		 2533 send_linger_ping(lreq);
2534 mutex_unlock(&lreq->lock);
2535 }
422d2cb8 2536
5aea3dcd
ID		 2537 if (found)
2538 list_move_tail(&osd->o_keepalive_item, &slow_osds);
422d2cb8 2539 }
5aea3dcd
ID		 2540
2541 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
2542 maybe_request_map(osdc);
2543
422d2cb8 2544 while (!list_empty(&slow_osds)) {
5aea3dcd
ID		 2545 struct ceph_osd *osd = list_first_entry(&slow_osds,
2546 struct ceph_osd,
2547 o_keepalive_item);
422d2cb8 2548 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 2549 ceph_con_keepalive(&osd->o_con);
2550 }
2551
5aea3dcd 2552 up_write(&osdc->lock);
fbca9635
ID		 2553 schedule_delayed_work(&osdc->timeout_work,
2554 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 2555}
2556
f5a2041b
YS		 2557static void handle_osds_timeout(struct work_struct *work)
2558{
2559 struct ceph_osd_client *osdc =
2560 container_of(work, struct ceph_osd_client,
2561 osds_timeout_work.work);
a319bf56 2562 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 2563 struct ceph_osd *osd, *nosd;
f5a2041b 2564
42a2c09f 2565 dout("%s osdc %p\n", __func__, osdc);
5aea3dcd 2566 down_write(&osdc->lock);
42a2c09f
ID		 2567 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
2568 if (time_before(jiffies, osd->lru_ttl))
2569 break;
2570
5aea3dcd 2571 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 2572 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
5aea3dcd 2573 close_osd(osd);
42a2c09f 2574 }
f5a2041b 2575
5aea3dcd 2576 up_write(&osdc->lock);
f5a2041b
YS		 2577 schedule_delayed_work(&osdc->osds_timeout_work,
2578 round_jiffies_relative(delay));
2579}
2580
205ee118
ID		 2581static int ceph_oloc_decode(void **p, void *end,
2582 struct ceph_object_locator *oloc)
2583{
2584 u8 struct_v, struct_cv;
2585 u32 len;
2586 void *struct_end;
2587 int ret = 0;
2588
2589 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
2590 struct_v = ceph_decode_8(p);
2591 struct_cv = ceph_decode_8(p);
2592 if (struct_v < 3) {
2593 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
2594 struct_v, struct_cv);
2595 goto e_inval;
2596 }
2597 if (struct_cv > 6) {
2598 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
2599 struct_v, struct_cv);
2600 goto e_inval;
2601 }
2602 len = ceph_decode_32(p);
2603 ceph_decode_need(p, end, len, e_inval);
2604 struct_end = *p + len;
2605
2606 oloc->pool = ceph_decode_64(p);
2607 *p += 4; /* skip preferred */
2608
2609 len = ceph_decode_32(p);
2610 if (len > 0) {
2611 pr_warn("ceph_object_locator::key is set\n");
2612 goto e_inval;
2613 }
2614
2615 if (struct_v >= 5) {
cd08e0a2
YZ		 2616 bool changed = false;
2617
205ee118
ID		 2618 len = ceph_decode_32(p);
2619 if (len > 0) {
30c156d9 2620 ceph_decode_need(p, end, len, e_inval);
cd08e0a2
YZ		 2621 if (!oloc->pool_ns ||
2622 ceph_compare_string(oloc->pool_ns, *p, len))
2623 changed = true;
30c156d9 2624 *p += len;
cd08e0a2
YZ		 2625 } else {
2626 if (oloc->pool_ns)
2627 changed = true;
2628 }
2629 if (changed) {
2630 /* redirect changes namespace */
2631 pr_warn("ceph_object_locator::nspace is changed\n");
2632 goto e_inval;
205ee118
ID		 2633 }
2634 }
2635
2636 if (struct_v >= 6) {
2637 s64 hash = ceph_decode_64(p);
2638 if (hash != -1) {
2639 pr_warn("ceph_object_locator::hash is set\n");
2640 goto e_inval;
2641 }
2642 }
2643
2644 /* skip the rest */
2645 *p = struct_end;
2646out:
2647 return ret;
2648
2649e_inval:
2650 ret = -EINVAL;
2651 goto out;
2652}
2653
2654static int ceph_redirect_decode(void **p, void *end,
2655 struct ceph_request_redirect *redir)
2656{
2657 u8 struct_v, struct_cv;
2658 u32 len;
2659 void *struct_end;
2660 int ret;
2661
2662 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
2663 struct_v = ceph_decode_8(p);
2664 struct_cv = ceph_decode_8(p);
2665 if (struct_cv > 1) {
2666 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
2667 struct_v, struct_cv);
2668 goto e_inval;
2669 }
2670 len = ceph_decode_32(p);
2671 ceph_decode_need(p, end, len, e_inval);
2672 struct_end = *p + len;
2673
2674 ret = ceph_oloc_decode(p, end, &redir->oloc);
2675 if (ret)
2676 goto out;
2677
2678 len = ceph_decode_32(p);
2679 if (len > 0) {
2680 pr_warn("ceph_request_redirect::object_name is set\n");
2681 goto e_inval;
2682 }
2683
2684 len = ceph_decode_32(p);
2685 *p += len; /* skip osd_instructions */
2686
2687 /* skip the rest */
2688 *p = struct_end;
2689out:
2690 return ret;
2691
2692e_inval:
2693 ret = -EINVAL;
2694 goto out;
2695}
2696
fe5da05e
ID		 2697struct MOSDOpReply {
2698 struct ceph_pg pgid;
2699 u64 flags;
2700 int result;
2701 u32 epoch;
2702 int num_ops;
2703 u32 outdata_len[CEPH_OSD_MAX_OPS];
2704 s32 rval[CEPH_OSD_MAX_OPS];
2705 int retry_attempt;
2706 struct ceph_eversion replay_version;
2707 u64 user_version;
2708 struct ceph_request_redirect redirect;
2709};
25845472 2710
fe5da05e 2711static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 2712{
fe5da05e
ID		 2713 void *p = msg->front.iov_base;
2714 void *const end = p + msg->front.iov_len;
2715 u16 version = le16_to_cpu(msg->hdr.version);
2716 struct ceph_eversion bad_replay_version;
b0b31a8f 2717 u8 decode_redir;
fe5da05e
ID		 2718 u32 len;
2719 int ret;
2720 int i;
1b83bef2 2721
fe5da05e
ID		 2722 ceph_decode_32_safe(&p, end, len, e_inval);
2723 ceph_decode_need(&p, end, len, e_inval);
2724 p += len; /* skip oid */
1b83bef2 2725
fe5da05e
ID		 2726 ret = ceph_decode_pgid(&p, end, &m->pgid);
2727 if (ret)
2728 return ret;
1b83bef2 2729
fe5da05e
ID		 2730 ceph_decode_64_safe(&p, end, m->flags, e_inval);
2731 ceph_decode_32_safe(&p, end, m->result, e_inval);
2732 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
2733 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
2734 p += sizeof(bad_replay_version);
2735 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 2736
fe5da05e
ID		 2737 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
2738 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
2739 goto e_inval;
1b83bef2 2740
fe5da05e
ID		 2741 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
2742 e_inval);
2743 for (i = 0; i < m->num_ops; i++) {
1b83bef2 2744 struct ceph_osd_op *op = p;
1b83bef2 2745
fe5da05e 2746 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 2747 p += sizeof(*op);
2748 }
1b83bef2 2749
fe5da05e
ID		 2750 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
2751 for (i = 0; i < m->num_ops; i++)
2752 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 2753
fe5da05e
ID		 2754 if (version >= 5) {
2755 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
2756 memcpy(&m->replay_version, p, sizeof(m->replay_version));
2757 p += sizeof(m->replay_version);
2758 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
2759 } else {
2760 m->replay_version = bad_replay_version; /* struct */
2761 m->user_version = le64_to_cpu(m->replay_version.version);
2762 }
eb845ff1 2763
fe5da05e
ID		 2764 if (version >= 6) {
2765 if (version >= 7)
2766 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 2767 else
2768 decode_redir = 1;
2769 } else {
2770 decode_redir = 0;
2771 }
2772
2773 if (decode_redir) {
fe5da05e
ID		 2774 ret = ceph_redirect_decode(&p, end, &m->redirect);
2775 if (ret)
2776 return ret;
205ee118 2777 } else {
fe5da05e 2778 ceph_oloc_init(&m->redirect.oloc);
205ee118 2779 }
f24e9980 2780
fe5da05e
ID		 2781 return 0;
2782
2783e_inval:
2784 return -EINVAL;
2785}
2786
2787/*
2788 * We are done with @req if
2789 * - @m is a safe reply, or
2790 * - @m is an unsafe reply and we didn't want a safe one
2791 */
2792static bool done_request(const struct ceph_osd_request *req,
2793 const struct MOSDOpReply *m)
2794{
2795 return (m->result < 0 ||
2796 (m->flags & CEPH_OSD_FLAG_ONDISK) ||
2797 !(req->r_flags & CEPH_OSD_FLAG_ONDISK));
2798}
205ee118 2799
fe5da05e
ID		 2800/*
2801 * handle osd op reply. either call the callback if it is specified,
2802 * or do the completion to wake up the waiting thread.
2803 *
2804 * ->r_unsafe_callback is set? yes no
2805 *
2806 * first reply is OK (needed r_cb/r_completion, r_cb/r_completion,
c297eb42 2807 * any or needed/got safe) r_done_completion r_done_completion
fe5da05e
ID		 2808 *
2809 * first reply is unsafe r_unsafe_cb(true) (nothing)
2810 *
2811 * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion,
c297eb42 2812 * r_done_completion r_done_completion
fe5da05e 2813 */
5aea3dcd 2814static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
fe5da05e 2815{
5aea3dcd 2816 struct ceph_osd_client *osdc = osd->o_osdc;
fe5da05e
ID		 2817 struct ceph_osd_request *req;
2818 struct MOSDOpReply m;
2819 u64 tid = le64_to_cpu(msg->hdr.tid);
2820 u32 data_len = 0;
2821 bool already_acked;
2822 int ret;
2823 int i;
2824
2825 dout("%s msg %p tid %llu\n", __func__, msg, tid);
2826
5aea3dcd
ID		 2827 down_read(&osdc->lock);
2828 if (!osd_registered(osd)) {
2829 dout("%s osd%d unknown\n", __func__, osd->o_osd);
2830 goto out_unlock_osdc;
2831 }
2832 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
2833
2834 mutex_lock(&osd->lock);
2835 req = lookup_request(&osd->o_requests, tid);
fe5da05e 2836 if (!req) {
5aea3dcd
ID		 2837 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
2838 goto out_unlock_session;
fe5da05e 2839 }
fe5da05e 2840
cd08e0a2 2841 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
fe5da05e 2842 ret = decode_MOSDOpReply(msg, &m);
cd08e0a2 2843 m.redirect.oloc.pool_ns = NULL;
fe5da05e
ID		 2844 if (ret) {
2845 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
2846 req->r_tid, ret);
2847 ceph_msg_dump(msg);
2848 goto fail_request;
2849 }
2850 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
2851 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
2852 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
2853 le64_to_cpu(m.replay_version.version), m.user_version);
2854
2855 if (m.retry_attempt >= 0) {
2856 if (m.retry_attempt != req->r_attempts - 1) {
2857 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
2858 req, req->r_tid, m.retry_attempt,
2859 req->r_attempts - 1);
5aea3dcd 2860 goto out_unlock_session;
fe5da05e
ID		 2861 }
2862 } else {
2863 WARN_ON(1); /* MOSDOpReply v4 is assumed */
2864 }
2865
2866 if (!ceph_oloc_empty(&m.redirect.oloc)) {
2867 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
2868 m.redirect.oloc.pool);
5aea3dcd
ID		 2869 unlink_request(osd, req);
2870 mutex_unlock(&osd->lock);
205ee118 2871
30c156d9
YZ		 2872 /*
2873 * Not ceph_oloc_copy() - changing pool_ns is not
2874 * supported.
2875 */
2876 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
5aea3dcd
ID		 2877 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
2878 req->r_tid = 0;
2879 __submit_request(req, false);
2880 goto out_unlock_osdc;
205ee118
ID		 2881 }
2882
fe5da05e
ID		 2883 if (m.num_ops != req->r_num_ops) {
2884 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
2885 req->r_num_ops, req->r_tid);
2886 goto fail_request;
f24e9980 2887 }
fe5da05e
ID		 2888 for (i = 0; i < req->r_num_ops; i++) {
2889 dout(" req %p tid %llu op %d rval %d len %u\n", req,
2890 req->r_tid, i, m.rval[i], m.outdata_len[i]);
2891 req->r_ops[i].rval = m.rval[i];
2892 req->r_ops[i].outdata_len = m.outdata_len[i];
2893 data_len += m.outdata_len[i];
2894 }
2895 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
2896 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
2897 le32_to_cpu(msg->hdr.data_len), req->r_tid);
2898 goto fail_request;
2899 }
2900 dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
2901 req, req->r_tid, req->r_got_reply, m.result, data_len);
2902
2903 already_acked = req->r_got_reply;
2904 if (!already_acked) {
2905 req->r_result = m.result ?: data_len;
2906 req->r_replay_version = m.replay_version; /* struct */
2907 req->r_got_reply = true;
2908 } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) {
2909 dout("req %p tid %llu dup ack\n", req, req->r_tid);
5aea3dcd 2910 goto out_unlock_session;
fe5da05e
ID		 2911 }
2912
2913 if (done_request(req, &m)) {
45ee2c1d 2914 finish_request(req);
fe5da05e
ID		 2915 if (req->r_linger) {
2916 WARN_ON(req->r_unsafe_callback);
922dab61
ID		 2917 dout("req %p tid %llu cb (locked)\n", req, req->r_tid);
2918 __complete_request(req);
fe5da05e
ID		 2919 }
2920 }
f24e9980 2921
5aea3dcd
ID		 2922 mutex_unlock(&osd->lock);
2923 up_read(&osdc->lock);
f24e9980 2924
fe5da05e
ID		 2925 if (done_request(req, &m)) {
2926 if (already_acked && req->r_unsafe_callback) {
2927 dout("req %p tid %llu safe-cb\n", req, req->r_tid);
61c5d6bf 2928 req->r_unsafe_callback(req, false);
922dab61 2929 } else if (!req->r_linger) {
fe5da05e
ID		 2930 dout("req %p tid %llu cb\n", req, req->r_tid);
2931 __complete_request(req);
2932 }
c297eb42 2933 complete_all(&req->r_done_completion);
dc045a91 2934 ceph_osdc_put_request(req);
fe5da05e
ID		 2935 } else {
2936 if (req->r_unsafe_callback) {
2937 dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
2938 req->r_unsafe_callback(req, true);
2939 } else {
2940 WARN_ON(1);
2941 }
61c5d6bf 2942 }
f24e9980 2943
f24e9980
SW		 2944 return;
2945
fe5da05e 2946fail_request:
4609245e 2947 complete_request(req, -EIO);
5aea3dcd
ID		 2948out_unlock_session:
2949 mutex_unlock(&osd->lock);
2950out_unlock_osdc:
2951 up_read(&osdc->lock);
f24e9980
SW		 2952}
2953
42c1b124
ID		 2954static void set_pool_was_full(struct ceph_osd_client *osdc)
2955{
2956 struct rb_node *n;
2957
2958 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
2959 struct ceph_pg_pool_info *pi =
2960 rb_entry(n, struct ceph_pg_pool_info, node);
2961
2962 pi->was_full = __pool_full(pi);
2963 }
2964}
2965
5aea3dcd 2966static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
f24e9980 2967{
5aea3dcd 2968 struct ceph_pg_pool_info *pi;
f24e9980 2969
5aea3dcd
ID		 2970 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
2971 if (!pi)
2972 return false;
f24e9980 2973
5aea3dcd 2974 return pi->was_full && !__pool_full(pi);
422d2cb8
YS		 2975}
2976
922dab61
ID		 2977static enum calc_target_result
2978recalc_linger_target(struct ceph_osd_linger_request *lreq)
2979{
2980 struct ceph_osd_client *osdc = lreq->osdc;
2981 enum calc_target_result ct_res;
2982
2983 ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true);
2984 if (ct_res == CALC_TARGET_NEED_RESEND) {
2985 struct ceph_osd *osd;
2986
2987 osd = lookup_create_osd(osdc, lreq->t.osd, true);
2988 if (osd != lreq->osd) {
2989 unlink_linger(lreq->osd, lreq);
2990 link_linger(osd, lreq);
2991 }
2992 }
2993
2994 return ct_res;
2995}
2996
422d2cb8 2997/*
5aea3dcd 2998 * Requeue requests whose mapping to an OSD has changed.
422d2cb8 2999 */
5aea3dcd
ID		 3000static void scan_requests(struct ceph_osd *osd,
3001 bool force_resend,
3002 bool cleared_full,
3003 bool check_pool_cleared_full,
3004 struct rb_root *need_resend,
3005 struct list_head *need_resend_linger)
422d2cb8 3006{
5aea3dcd
ID		 3007 struct ceph_osd_client *osdc = osd->o_osdc;
3008 struct rb_node *n;
3009 bool force_resend_writes;
3010
922dab61
ID		 3011 for (n = rb_first(&osd->o_linger_requests); n; ) {
3012 struct ceph_osd_linger_request *lreq =
3013 rb_entry(n, struct ceph_osd_linger_request, node);
3014 enum calc_target_result ct_res;
3015
3016 n = rb_next(n); /* recalc_linger_target() */
3017
3018 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3019 lreq->linger_id);
3020 ct_res = recalc_linger_target(lreq);
3021 switch (ct_res) {
3022 case CALC_TARGET_NO_ACTION:
3023 force_resend_writes = cleared_full ||
3024 (check_pool_cleared_full &&
3025 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3026 if (!force_resend && !force_resend_writes)
3027 break;
3028
3029 /* fall through */
3030 case CALC_TARGET_NEED_RESEND:
4609245e 3031 cancel_linger_map_check(lreq);
922dab61
ID		 3032 /*
3033 * scan_requests() for the previous epoch(s)
3034 * may have already added it to the list, since
3035 * it's not unlinked here.
3036 */
3037 if (list_empty(&lreq->scan_item))
3038 list_add_tail(&lreq->scan_item, need_resend_linger);
3039 break;
3040 case CALC_TARGET_POOL_DNE:
4609245e 3041 check_linger_pool_dne(lreq);
922dab61
ID		 3042 break;
3043 }
3044 }
3045
5aea3dcd
ID		 3046 for (n = rb_first(&osd->o_requests); n; ) {
3047 struct ceph_osd_request *req =
3048 rb_entry(n, struct ceph_osd_request, r_node);
3049 enum calc_target_result ct_res;
3050
4609245e 3051 n = rb_next(n); /* unlink_request(), check_pool_dne() */
5aea3dcd
ID		 3052
3053 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3054 ct_res = calc_target(osdc, &req->r_t,
3055 &req->r_last_force_resend, false);
3056 switch (ct_res) {
3057 case CALC_TARGET_NO_ACTION:
3058 force_resend_writes = cleared_full ||
3059 (check_pool_cleared_full &&
3060 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3061 if (!force_resend &&
3062 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3063 !force_resend_writes))
3064 break;
3065
3066 /* fall through */
3067 case CALC_TARGET_NEED_RESEND:
4609245e 3068 cancel_map_check(req);
5aea3dcd
ID		 3069 unlink_request(osd, req);
3070 insert_request(need_resend, req);
3071 break;
3072 case CALC_TARGET_POOL_DNE:
4609245e 3073 check_pool_dne(req);
5aea3dcd 3074 break;
b0494532 3075 }
6f6c7006 3076 }
422d2cb8 3077}
6f6c7006 3078
42c1b124 3079static int handle_one_map(struct ceph_osd_client *osdc,
5aea3dcd
ID		 3080 void *p, void *end, bool incremental,
3081 struct rb_root *need_resend,
3082 struct list_head *need_resend_linger)
42c1b124
ID		 3083{
3084 struct ceph_osdmap *newmap;
3085 struct rb_node *n;
3086 bool skipped_map = false;
3087 bool was_full;
3088
b7ec35b3 3089 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
42c1b124
ID		 3090 set_pool_was_full(osdc);
3091
3092 if (incremental)
3093 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3094 else
3095 newmap = ceph_osdmap_decode(&p, end);
3096 if (IS_ERR(newmap))
3097 return PTR_ERR(newmap);
3098
3099 if (newmap != osdc->osdmap) {
3100 /*
3101 * Preserve ->was_full before destroying the old map.
3102 * For pools that weren't in the old map, ->was_full
3103 * should be false.
3104 */
3105 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3106 struct ceph_pg_pool_info *pi =
3107 rb_entry(n, struct ceph_pg_pool_info, node);
3108 struct ceph_pg_pool_info *old_pi;
3109
3110 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3111 if (old_pi)
3112 pi->was_full = old_pi->was_full;
3113 else
3114 WARN_ON(pi->was_full);
3115 }
3116
3117 if (osdc->osdmap->epoch &&
3118 osdc->osdmap->epoch + 1 < newmap->epoch) {
3119 WARN_ON(incremental);
3120 skipped_map = true;
3121 }
3122
3123 ceph_osdmap_destroy(osdc->osdmap);
3124 osdc->osdmap = newmap;
3125 }
3126
b7ec35b3 3127 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
5aea3dcd
ID		 3128 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3129 need_resend, need_resend_linger);
3130
3131 for (n = rb_first(&osdc->osds); n; ) {
3132 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3133
3134 n = rb_next(n); /* close_osd() */
3135
3136 scan_requests(osd, skipped_map, was_full, true, need_resend,
3137 need_resend_linger);
3138 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3139 memcmp(&osd->o_con.peer_addr,
3140 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3141 sizeof(struct ceph_entity_addr)))
3142 close_osd(osd);
3143 }
42c1b124
ID		 3144
3145 return 0;
3146}
6f6c7006 3147
5aea3dcd
ID		 3148static void kick_requests(struct ceph_osd_client *osdc,
3149 struct rb_root *need_resend,
3150 struct list_head *need_resend_linger)
3151{
922dab61 3152 struct ceph_osd_linger_request *lreq, *nlreq;
5aea3dcd
ID		 3153 struct rb_node *n;
3154
3155 for (n = rb_first(need_resend); n; ) {
3156 struct ceph_osd_request *req =
3157 rb_entry(n, struct ceph_osd_request, r_node);
3158 struct ceph_osd *osd;
3159
3160 n = rb_next(n);
3161 erase_request(need_resend, req); /* before link_request() */
3162
3163 WARN_ON(req->r_osd);
3164 calc_target(osdc, &req->r_t, NULL, false);
3165 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3166 link_request(osd, req);
3167 if (!req->r_linger) {
3168 if (!osd_homeless(osd) && !req->r_t.paused)
3169 send_request(req);
922dab61
ID		 3170 } else {
3171 cancel_linger_request(req);
5aea3dcd
ID		 3172 }
3173 }
922dab61
ID		 3174
3175 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3176 if (!osd_homeless(lreq->osd))
3177 send_linger(lreq);
3178
3179 list_del_init(&lreq->scan_item);
3180 }
5aea3dcd
ID		 3181}
3182
f24e9980
SW		 3183/*
3184 * Process updated osd map.
3185 *
3186 * The message contains any number of incremental and full maps, normally
3187 * indicating some sort of topology change in the cluster. Kick requests
3188 * off to different OSDs as needed.
3189 */
3190void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3191{
42c1b124
ID		 3192 void *p = msg->front.iov_base;
3193 void *const end = p + msg->front.iov_len;
f24e9980
SW		 3194 u32 nr_maps, maplen;
3195 u32 epoch;
f24e9980 3196 struct ceph_fsid fsid;
5aea3dcd
ID		 3197 struct rb_root need_resend = RB_ROOT;
3198 LIST_HEAD(need_resend_linger);
42c1b124
ID		 3199 bool handled_incremental = false;
3200 bool was_pauserd, was_pausewr;
3201 bool pauserd, pausewr;
3202 int err;
f24e9980 3203
42c1b124 3204 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
5aea3dcd 3205 down_write(&osdc->lock);
f24e9980
SW		 3206
3207 /* verify fsid */
3208 ceph_decode_need(&p, end, sizeof(fsid), bad);
3209 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 3210 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 3211 goto bad;
f24e9980 3212
b7ec35b3
ID		 3213 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3214 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3215 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3216 have_pool_full(osdc);
9a1ea2db 3217
f24e9980
SW		 3218 /* incremental maps */
3219 ceph_decode_32_safe(&p, end, nr_maps, bad);
3220 dout(" %d inc maps\n", nr_maps);
3221 while (nr_maps > 0) {
3222 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3223 epoch = ceph_decode_32(&p);
3224 maplen = ceph_decode_32(&p);
f24e9980 3225 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 3226 if (osdc->osdmap->epoch &&
3227 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 3228 dout("applying incremental map %u len %d\n",
3229 epoch, maplen);
5aea3dcd
ID		 3230 err = handle_one_map(osdc, p, p + maplen, true,
3231 &need_resend, &need_resend_linger);
42c1b124 3232 if (err)
f24e9980 3233 goto bad;
42c1b124 3234 handled_incremental = true;
f24e9980
SW		 3235 } else {
3236 dout("ignoring incremental map %u len %d\n",
3237 epoch, maplen);
3238 }
42c1b124 3239 p += maplen;
f24e9980
SW		 3240 nr_maps--;
3241 }
42c1b124 3242 if (handled_incremental)
f24e9980
SW		 3243 goto done;
3244
3245 /* full maps */
3246 ceph_decode_32_safe(&p, end, nr_maps, bad);
3247 dout(" %d full maps\n", nr_maps);
3248 while (nr_maps) {
3249 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3250 epoch = ceph_decode_32(&p);
3251 maplen = ceph_decode_32(&p);
f24e9980
SW		 3252 ceph_decode_need(&p, end, maplen, bad);
3253 if (nr_maps > 1) {
3254 dout("skipping non-latest full map %u len %d\n",
3255 epoch, maplen);
e5253a7b 3256 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 3257 dout("skipping full map %u len %d, "
3258 "older than our %u\n", epoch, maplen,
3259 osdc->osdmap->epoch);
3260 } else {
3261 dout("taking full map %u len %d\n", epoch, maplen);
5aea3dcd
ID		 3262 err = handle_one_map(osdc, p, p + maplen, false,
3263 &need_resend, &need_resend_linger);
42c1b124 3264 if (err)
f24e9980 3265 goto bad;
f24e9980
SW		 3266 }
3267 p += maplen;
3268 nr_maps--;
3269 }
3270
3271done:
cd634fb6
SW		 3272 /*
3273 * subscribe to subsequent osdmap updates if full to ensure
3274 * we find out when we are no longer full and stop returning
3275 * ENOSPC.
3276 */
b7ec35b3
ID		 3277 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3278 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3279 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124
ID		 3280 have_pool_full(osdc);
3281 if (was_pauserd || was_pausewr || pauserd || pausewr)
3282 maybe_request_map(osdc);
cd634fb6 3283
5aea3dcd 3284 kick_requests(osdc, &need_resend, &need_resend_linger);
42c1b124
ID		 3285
3286 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
3287 osdc->osdmap->epoch);
5aea3dcd 3288 up_write(&osdc->lock);
03066f23 3289 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 3290 return;
3291
3292bad:
3293 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 3294 ceph_msg_dump(msg);
5aea3dcd
ID		 3295 up_write(&osdc->lock);
3296}
3297
3298/*
3299 * Resubmit requests pending on the given osd.
3300 */
3301static void kick_osd_requests(struct ceph_osd *osd)
3302{
3303 struct rb_node *n;
3304
922dab61 3305 for (n = rb_first(&osd->o_requests); n; ) {
5aea3dcd
ID		 3306 struct ceph_osd_request *req =
3307 rb_entry(n, struct ceph_osd_request, r_node);
3308
922dab61
ID		 3309 n = rb_next(n); /* cancel_linger_request() */
3310
5aea3dcd
ID		 3311 if (!req->r_linger) {
3312 if (!req->r_t.paused)
3313 send_request(req);
922dab61
ID		 3314 } else {
3315 cancel_linger_request(req);
5aea3dcd
ID		 3316 }
3317 }
922dab61
ID		 3318 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
3319 struct ceph_osd_linger_request *lreq =
3320 rb_entry(n, struct ceph_osd_linger_request, node);
3321
3322 send_linger(lreq);
3323 }
5aea3dcd
ID		 3324}
3325
3326/*
3327 * If the osd connection drops, we need to resubmit all requests.
3328 */
3329static void osd_fault(struct ceph_connection *con)
3330{
3331 struct ceph_osd *osd = con->private;
3332 struct ceph_osd_client *osdc = osd->o_osdc;
3333
3334 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
3335
3336 down_write(&osdc->lock);
3337 if (!osd_registered(osd)) {
3338 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3339 goto out_unlock;
3340 }
3341
3342 if (!reopen_osd(osd))
3343 kick_osd_requests(osd);
3344 maybe_request_map(osdc);
3345
3346out_unlock:
3347 up_write(&osdc->lock);
f24e9980
SW		 3348}
3349
a40c4f10
YS		 3350/*
3351 * Process osd watch notifications
3352 */
3c663bbd
AE		 3353static void handle_watch_notify(struct ceph_osd_client *osdc,
3354 struct ceph_msg *msg)
a40c4f10 3355{
922dab61
ID		 3356 void *p = msg->front.iov_base;
3357 void *const end = p + msg->front.iov_len;
3358 struct ceph_osd_linger_request *lreq;
3359 struct linger_work *lwork;
3360 u8 proto_ver, opcode;
3361 u64 cookie, notify_id;
3362 u64 notifier_id = 0;
19079203 3363 s32 return_code = 0;
922dab61
ID		 3364 void *payload = NULL;
3365 u32 payload_len = 0;
a40c4f10
YS		 3366
3367 ceph_decode_8_safe(&p, end, proto_ver, bad);
3368 ceph_decode_8_safe(&p, end, opcode, bad);
3369 ceph_decode_64_safe(&p, end, cookie, bad);
922dab61 3370 p += 8; /* skip ver */
a40c4f10
YS		 3371 ceph_decode_64_safe(&p, end, notify_id, bad);
3372
922dab61
ID		 3373 if (proto_ver >= 1) {
3374 ceph_decode_32_safe(&p, end, payload_len, bad);
3375 ceph_decode_need(&p, end, payload_len, bad);
3376 payload = p;
3377 p += payload_len;
3378 }
3379
3380 if (le16_to_cpu(msg->hdr.version) >= 2)
19079203 3381 ceph_decode_32_safe(&p, end, return_code, bad);
922dab61
ID		 3382
3383 if (le16_to_cpu(msg->hdr.version) >= 3)
3384 ceph_decode_64_safe(&p, end, notifier_id, bad);
3385
3386 down_read(&osdc->lock);
3387 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
3388 if (!lreq) {
3389 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
3390 cookie);
3391 goto out_unlock_osdc;
3392 }
3393
3394 mutex_lock(&lreq->lock);
19079203
ID		 3395 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
3396 opcode, cookie, lreq, lreq->is_watch);
922dab61
ID		 3397 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
3398 if (!lreq->last_error) {
3399 lreq->last_error = -ENOTCONN;
3400 queue_watch_error(lreq);
3401 }
19079203
ID		 3402 } else if (!lreq->is_watch) {
3403 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
3404 if (lreq->notify_id && lreq->notify_id != notify_id) {
3405 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
3406 lreq->notify_id, notify_id);
3407 } else if (!completion_done(&lreq->notify_finish_wait)) {
3408 struct ceph_msg_data *data =
3409 list_first_entry_or_null(&msg->data,
3410 struct ceph_msg_data,
3411 links);
3412
3413 if (data) {
3414 if (lreq->preply_pages) {
3415 WARN_ON(data->type !=
3416 CEPH_MSG_DATA_PAGES);
3417 *lreq->preply_pages = data->pages;
3418 *lreq->preply_len = data->length;
3419 } else {
3420 ceph_release_page_vector(data->pages,
3421 calc_pages_for(0, data->length));
3422 }
3423 }
3424 lreq->notify_finish_error = return_code;
3425 complete_all(&lreq->notify_finish_wait);
3426 }
922dab61
ID		 3427 } else {
3428 /* CEPH_WATCH_EVENT_NOTIFY */
3429 lwork = lwork_alloc(lreq, do_watch_notify);
3430 if (!lwork) {
3431 pr_err("failed to allocate notify-lwork\n");
3432 goto out_unlock_lreq;
a40c4f10 3433 }
a40c4f10 3434
922dab61
ID		 3435 lwork->notify.notify_id = notify_id;
3436 lwork->notify.notifier_id = notifier_id;
3437 lwork->notify.payload = payload;
3438 lwork->notify.payload_len = payload_len;
3439 lwork->notify.msg = ceph_msg_get(msg);
3440 lwork_queue(lwork);
91883cd2 3441 }
a40c4f10 3442
922dab61
ID		 3443out_unlock_lreq:
3444 mutex_unlock(&lreq->lock);
3445out_unlock_osdc:
3446 up_read(&osdc->lock);
a40c4f10
YS		 3447 return;
3448
3449bad:
3450 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 3451}
3452
70636773
AE		 3453/*
3454 * Register request, send initial attempt.
3455 */
3456int ceph_osdc_start_request(struct ceph_osd_client *osdc,
3457 struct ceph_osd_request *req,
3458 bool nofail)
3459{
5aea3dcd
ID		 3460 down_read(&osdc->lock);
3461 submit_request(req, false);
3462 up_read(&osdc->lock);
0bbfdfe8 3463
5aea3dcd 3464 return 0;
f24e9980 3465}
3d14c5d2 3466EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 3467
c9f9b93d 3468/*
c297eb42
ID		 3469 * Unregister a registered request. The request is not completed:
3470 * ->r_result isn't set and __complete_request() isn't called.
c9f9b93d
ID		 3471 */
3472void ceph_osdc_cancel_request(struct ceph_osd_request *req)
3473{
3474 struct ceph_osd_client *osdc = req->r_osdc;
3475
5aea3dcd 3476 down_write(&osdc->lock);
5aea3dcd
ID		 3477 if (req->r_osd)
3478 cancel_request(req);
3479 up_write(&osdc->lock);
c9f9b93d
ID		 3480}
3481EXPORT_SYMBOL(ceph_osdc_cancel_request);
3482
f24e9980 3483/*
42b06965 3484 * @timeout: in jiffies, 0 means "wait forever"
f24e9980 3485 */
42b06965
ID		 3486static int wait_request_timeout(struct ceph_osd_request *req,
3487 unsigned long timeout)
f24e9980 3488{
42b06965 3489 long left;
c9f9b93d 3490
42b06965 3491 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
0e76abf2 3492 left = wait_for_completion_killable_timeout(&req->r_completion,
42b06965
ID		 3493 ceph_timeout_jiffies(timeout));
3494 if (left <= 0) {
3495 left = left ?: -ETIMEDOUT;
c9f9b93d 3496 ceph_osdc_cancel_request(req);
42b06965
ID		 3497 } else {
3498 left = req->r_result; /* completed */
f24e9980
SW		 3499 }
3500
42b06965
ID		 3501 return left;
3502}
3503
3504/*
3505 * wait for a request to complete
3506 */
3507int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
3508 struct ceph_osd_request *req)
3509{
3510 return wait_request_timeout(req, 0);
f24e9980 3511}
3d14c5d2 3512EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 3513
3514/*
3515 * sync - wait for all in-flight requests to flush. avoid starvation.
3516 */
3517void ceph_osdc_sync(struct ceph_osd_client *osdc)
3518{
5aea3dcd
ID		 3519 struct rb_node *n, *p;
3520 u64 last_tid = atomic64_read(&osdc->last_tid);
f24e9980 3521
5aea3dcd
ID		 3522again:
3523 down_read(&osdc->lock);
3524 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3525 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3526
3527 mutex_lock(&osd->lock);
3528 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
3529 struct ceph_osd_request *req =
3530 rb_entry(p, struct ceph_osd_request, r_node);
3531
3532 if (req->r_tid > last_tid)
3533 break;
3534
3535 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
3536 continue;
f24e9980 3537
5aea3dcd
ID		 3538 ceph_osdc_get_request(req);
3539 mutex_unlock(&osd->lock);
3540 up_read(&osdc->lock);
3541 dout("%s waiting on req %p tid %llu last_tid %llu\n",
3542 __func__, req, req->r_tid, last_tid);
c297eb42 3543 wait_for_completion(&req->r_done_completion);
5aea3dcd
ID		 3544 ceph_osdc_put_request(req);
3545 goto again;
3546 }
f24e9980 3547
5aea3dcd 3548 mutex_unlock(&osd->lock);
f24e9980 3549 }
5aea3dcd
ID		 3550
3551 up_read(&osdc->lock);
3552 dout("%s done last_tid %llu\n", __func__, last_tid);
f24e9980 3553}
3d14c5d2 3554EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 3555
922dab61
ID		 3556static struct ceph_osd_request *
3557alloc_linger_request(struct ceph_osd_linger_request *lreq)
3558{
3559 struct ceph_osd_request *req;
3560
3561 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
3562 if (!req)
3563 return NULL;
3564
3565 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3566 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3567
3568 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
3569 ceph_osdc_put_request(req);
3570 return NULL;
3571 }
3572
3573 return req;
3574}
3575
3576/*
3577 * Returns a handle, caller owns a ref.
3578 */
3579struct ceph_osd_linger_request *
3580ceph_osdc_watch(struct ceph_osd_client *osdc,
3581 struct ceph_object_id *oid,
3582 struct ceph_object_locator *oloc,
3583 rados_watchcb2_t wcb,
3584 rados_watcherrcb_t errcb,
3585 void *data)
3586{
3587 struct ceph_osd_linger_request *lreq;
3588 int ret;
3589
3590 lreq = linger_alloc(osdc);
3591 if (!lreq)
3592 return ERR_PTR(-ENOMEM);
3593
19079203 3594 lreq->is_watch = true;
922dab61
ID		 3595 lreq->wcb = wcb;
3596 lreq->errcb = errcb;
3597 lreq->data = data;
b07d3c4b 3598 lreq->watch_valid_thru = jiffies;
922dab61
ID		 3599
3600 ceph_oid_copy(&lreq->t.base_oid, oid);
3601 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
3602 lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
3603 lreq->mtime = CURRENT_TIME;
3604
3605 lreq->reg_req = alloc_linger_request(lreq);
3606 if (!lreq->reg_req) {
3607 ret = -ENOMEM;
3608 goto err_put_lreq;
3609 }
3610
3611 lreq->ping_req = alloc_linger_request(lreq);
3612 if (!lreq->ping_req) {
3613 ret = -ENOMEM;
3614 goto err_put_lreq;
3615 }
3616
3617 down_write(&osdc->lock);
3618 linger_register(lreq); /* before osd_req_op_* */
3619 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
3620 CEPH_OSD_WATCH_OP_WATCH);
3621 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
3622 CEPH_OSD_WATCH_OP_PING);
3623 linger_submit(lreq);
3624 up_write(&osdc->lock);
3625
3626 ret = linger_reg_commit_wait(lreq);
3627 if (ret) {
3628 linger_cancel(lreq);
3629 goto err_put_lreq;
3630 }
3631
3632 return lreq;
3633
3634err_put_lreq:
3635 linger_put(lreq);
3636 return ERR_PTR(ret);
3637}
3638EXPORT_SYMBOL(ceph_osdc_watch);
3639
3640/*
3641 * Releases a ref.
3642 *
3643 * Times out after mount_timeout to preserve rbd unmap behaviour
3644 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
3645 * with mount_timeout").
3646 */
3647int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
3648 struct ceph_osd_linger_request *lreq)
3649{
3650 struct ceph_options *opts = osdc->client->options;
3651 struct ceph_osd_request *req;
3652 int ret;
3653
3654 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3655 if (!req)
3656 return -ENOMEM;
3657
3658 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3659 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3660 req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
3661 req->r_mtime = CURRENT_TIME;
3662 osd_req_op_watch_init(req, 0, lreq->linger_id,
3663 CEPH_OSD_WATCH_OP_UNWATCH);
3664
3665 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3666 if (ret)
3667 goto out_put_req;
3668
3669 ceph_osdc_start_request(osdc, req, false);
3670 linger_cancel(lreq);
3671 linger_put(lreq);
3672 ret = wait_request_timeout(req, opts->mount_timeout);
3673
3674out_put_req:
3675 ceph_osdc_put_request(req);
3676 return ret;
3677}
3678EXPORT_SYMBOL(ceph_osdc_unwatch);
3679
3680static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
3681 u64 notify_id, u64 cookie, void *payload,
3682 size_t payload_len)
3683{
3684 struct ceph_osd_req_op *op;
3685 struct ceph_pagelist *pl;
3686 int ret;
3687
3688 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
3689
3690 pl = kmalloc(sizeof(*pl), GFP_NOIO);
3691 if (!pl)
3692 return -ENOMEM;
3693
3694 ceph_pagelist_init(pl);
3695 ret = ceph_pagelist_encode_64(pl, notify_id);
3696 ret |= ceph_pagelist_encode_64(pl, cookie);
3697 if (payload) {
3698 ret |= ceph_pagelist_encode_32(pl, payload_len);
3699 ret |= ceph_pagelist_append(pl, payload, payload_len);
3700 } else {
3701 ret |= ceph_pagelist_encode_32(pl, 0);
3702 }
3703 if (ret) {
3704 ceph_pagelist_release(pl);
3705 return -ENOMEM;
3706 }
3707
3708 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
3709 op->indata_len = pl->length;
3710 return 0;
3711}
3712
3713int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
3714 struct ceph_object_id *oid,
3715 struct ceph_object_locator *oloc,
3716 u64 notify_id,
3717 u64 cookie,
3718 void *payload,
3719 size_t payload_len)
3720{
3721 struct ceph_osd_request *req;
3722 int ret;
3723
3724 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3725 if (!req)
3726 return -ENOMEM;
3727
3728 ceph_oid_copy(&req->r_base_oid, oid);
3729 ceph_oloc_copy(&req->r_base_oloc, oloc);
3730 req->r_flags = CEPH_OSD_FLAG_READ;
3731
3732 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3733 if (ret)
3734 goto out_put_req;
3735
3736 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
3737 payload_len);
3738 if (ret)
3739 goto out_put_req;
3740
3741 ceph_osdc_start_request(osdc, req, false);
3742 ret = ceph_osdc_wait_request(osdc, req);
3743
3744out_put_req:
3745 ceph_osdc_put_request(req);
3746 return ret;
3747}
3748EXPORT_SYMBOL(ceph_osdc_notify_ack);
3749
19079203
ID		 3750static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
3751 u64 cookie, u32 prot_ver, u32 timeout,
3752 void *payload, size_t payload_len)
3753{
3754 struct ceph_osd_req_op *op;
3755 struct ceph_pagelist *pl;
3756 int ret;
3757
3758 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
3759 op->notify.cookie = cookie;
3760
3761 pl = kmalloc(sizeof(*pl), GFP_NOIO);
3762 if (!pl)
3763 return -ENOMEM;
3764
3765 ceph_pagelist_init(pl);
3766 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
3767 ret |= ceph_pagelist_encode_32(pl, timeout);
3768 ret |= ceph_pagelist_encode_32(pl, payload_len);
3769 ret |= ceph_pagelist_append(pl, payload, payload_len);
3770 if (ret) {
3771 ceph_pagelist_release(pl);
3772 return -ENOMEM;
3773 }
3774
3775 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
3776 op->indata_len = pl->length;
3777 return 0;
3778}
3779
3780/*
3781 * @timeout: in seconds
3782 *
3783 * @preply_{pages,len} are initialized both on success and error.
3784 * The caller is responsible for:
3785 *
3786 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
3787 */
3788int ceph_osdc_notify(struct ceph_osd_client *osdc,
3789 struct ceph_object_id *oid,
3790 struct ceph_object_locator *oloc,
3791 void *payload,
3792 size_t payload_len,
3793 u32 timeout,
3794 struct page ***preply_pages,
3795 size_t *preply_len)
3796{
3797 struct ceph_osd_linger_request *lreq;
3798 struct page **pages;
3799 int ret;
3800
3801 WARN_ON(!timeout);
3802 if (preply_pages) {
3803 *preply_pages = NULL;
3804 *preply_len = 0;
3805 }
3806
3807 lreq = linger_alloc(osdc);
3808 if (!lreq)
3809 return -ENOMEM;
3810
3811 lreq->preply_pages = preply_pages;
3812 lreq->preply_len = preply_len;
3813
3814 ceph_oid_copy(&lreq->t.base_oid, oid);
3815 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
3816 lreq->t.flags = CEPH_OSD_FLAG_READ;
3817
3818 lreq->reg_req = alloc_linger_request(lreq);
3819 if (!lreq->reg_req) {
3820 ret = -ENOMEM;
3821 goto out_put_lreq;
3822 }
3823
3824 /* for notify_id */
3825 pages = ceph_alloc_page_vector(1, GFP_NOIO);
3826 if (IS_ERR(pages)) {
3827 ret = PTR_ERR(pages);
3828 goto out_put_lreq;
3829 }
3830
3831 down_write(&osdc->lock);
3832 linger_register(lreq); /* before osd_req_op_* */
3833 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
3834 timeout, payload, payload_len);
3835 if (ret) {
3836 linger_unregister(lreq);
3837 up_write(&osdc->lock);
3838 ceph_release_page_vector(pages, 1);
3839 goto out_put_lreq;
3840 }
3841 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
3842 response_data),
3843 pages, PAGE_SIZE, 0, false, true);
3844 linger_submit(lreq);
3845 up_write(&osdc->lock);
3846
3847 ret = linger_reg_commit_wait(lreq);
3848 if (!ret)
3849 ret = linger_notify_finish_wait(lreq);
3850 else
3851 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
3852
3853 linger_cancel(lreq);
3854out_put_lreq:
3855 linger_put(lreq);
3856 return ret;
3857}
3858EXPORT_SYMBOL(ceph_osdc_notify);
3859
b07d3c4b
ID		 3860/*
3861 * Return the number of milliseconds since the watch was last
3862 * confirmed, or an error. If there is an error, the watch is no
3863 * longer valid, and should be destroyed with ceph_osdc_unwatch().
3864 */
3865int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
3866 struct ceph_osd_linger_request *lreq)
3867{
3868 unsigned long stamp, age;
3869 int ret;
3870
3871 down_read(&osdc->lock);
3872 mutex_lock(&lreq->lock);
3873 stamp = lreq->watch_valid_thru;
3874 if (!list_empty(&lreq->pending_lworks)) {
3875 struct linger_work *lwork =
3876 list_first_entry(&lreq->pending_lworks,
3877 struct linger_work,
3878 pending_item);
3879
3880 if (time_before(lwork->queued_stamp, stamp))
3881 stamp = lwork->queued_stamp;
3882 }
3883 age = jiffies - stamp;
3884 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
3885 lreq, lreq->linger_id, age, lreq->last_error);
3886 /* we are truncating to msecs, so return a safe upper bound */
3887 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
3888
3889 mutex_unlock(&lreq->lock);
3890 up_read(&osdc->lock);
3891 return ret;
3892}
3893
a4ed38d7
DF		 3894static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
3895{
3896 u8 struct_v;
3897 u32 struct_len;
3898 int ret;
3899
3900 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
3901 &struct_v, &struct_len);
3902 if (ret)
3903 return ret;
3904
3905 ceph_decode_copy(p, &item->name, sizeof(item->name));
3906 item->cookie = ceph_decode_64(p);
3907 *p += 4; /* skip timeout_seconds */
3908 if (struct_v >= 2) {
3909 ceph_decode_copy(p, &item->addr, sizeof(item->addr));
3910 ceph_decode_addr(&item->addr);
3911 }
3912
3913 dout("%s %s%llu cookie %llu addr %s\n", __func__,
3914 ENTITY_NAME(item->name), item->cookie,
3915 ceph_pr_addr(&item->addr.in_addr));
3916 return 0;
3917}
3918
3919static int decode_watchers(void **p, void *end,
3920 struct ceph_watch_item **watchers,
3921 u32 *num_watchers)
3922{
3923 u8 struct_v;
3924 u32 struct_len;
3925 int i;
3926 int ret;
3927
3928 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
3929 &struct_v, &struct_len);
3930 if (ret)
3931 return ret;
3932
3933 *num_watchers = ceph_decode_32(p);
3934 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
3935 if (!*watchers)
3936 return -ENOMEM;
3937
3938 for (i = 0; i < *num_watchers; i++) {
3939 ret = decode_watcher(p, end, *watchers + i);
3940 if (ret) {
3941 kfree(*watchers);
3942 return ret;
3943 }
3944 }
3945
3946 return 0;
3947}
3948
3949/*
3950 * On success, the caller is responsible for:
3951 *
3952 * kfree(watchers);
3953 */
3954int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
3955 struct ceph_object_id *oid,
3956 struct ceph_object_locator *oloc,
3957 struct ceph_watch_item **watchers,
3958 u32 *num_watchers)
3959{
3960 struct ceph_osd_request *req;
3961 struct page **pages;
3962 int ret;
3963
3964 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3965 if (!req)
3966 return -ENOMEM;
3967
3968 ceph_oid_copy(&req->r_base_oid, oid);
3969 ceph_oloc_copy(&req->r_base_oloc, oloc);
3970 req->r_flags = CEPH_OSD_FLAG_READ;
3971
3972 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3973 if (ret)
3974 goto out_put_req;
3975
3976 pages = ceph_alloc_page_vector(1, GFP_NOIO);
3977 if (IS_ERR(pages)) {
3978 ret = PTR_ERR(pages);
3979 goto out_put_req;
3980 }
3981
3982 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
3983 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
3984 response_data),
3985 pages, PAGE_SIZE, 0, false, true);
3986
3987 ceph_osdc_start_request(osdc, req, false);
3988 ret = ceph_osdc_wait_request(osdc, req);
3989 if (ret >= 0) {
3990 void *p = page_address(pages[0]);
3991 void *const end = p + req->r_ops[0].outdata_len;
3992
3993 ret = decode_watchers(&p, end, watchers, num_watchers);
3994 }
3995
3996out_put_req:
3997 ceph_osdc_put_request(req);
3998 return ret;
3999}
4000EXPORT_SYMBOL(ceph_osdc_list_watchers);
4001
dd935f44
JD		 4002/*
4003 * Call all pending notify callbacks - for use after a watch is
4004 * unregistered, to make sure no more callbacks for it will be invoked
4005 */
f6479449 4006void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44 4007{
99d16943 4008 dout("%s osdc %p\n", __func__, osdc);
dd935f44
JD		 4009 flush_workqueue(osdc->notify_wq);
4010}
4011EXPORT_SYMBOL(ceph_osdc_flush_notifies);
4012
7cca78c9
ID		 4013void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
4014{
4015 down_read(&osdc->lock);
4016 maybe_request_map(osdc);
4017 up_read(&osdc->lock);
4018}
4019EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
dd935f44 4020
428a7158
DF		 4021/*
4022 * Execute an OSD class method on an object.
4023 *
4024 * @flags: CEPH_OSD_FLAG_*
4025 * @resp_len: out param for reply length
4026 */
4027int ceph_osdc_call(struct ceph_osd_client *osdc,
4028 struct ceph_object_id *oid,
4029 struct ceph_object_locator *oloc,
4030 const char *class, const char *method,
4031 unsigned int flags,
4032 struct page *req_page, size_t req_len,
4033 struct page *resp_page, size_t *resp_len)
4034{
4035 struct ceph_osd_request *req;
4036 int ret;
4037
4038 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4039 if (!req)
4040 return -ENOMEM;
4041
4042 ceph_oid_copy(&req->r_base_oid, oid);
4043 ceph_oloc_copy(&req->r_base_oloc, oloc);
4044 req->r_flags = flags;
4045
4046 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4047 if (ret)
4048 goto out_put_req;
4049
4050 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
4051 if (req_page)
4052 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
4053 0, false, false);
4054 if (resp_page)
4055 osd_req_op_cls_response_data_pages(req, 0, &resp_page,
4056 PAGE_SIZE, 0, false, false);
4057
4058 ceph_osdc_start_request(osdc, req, false);
4059 ret = ceph_osdc_wait_request(osdc, req);
4060 if (ret >= 0) {
4061 ret = req->r_ops[0].rval;
4062 if (resp_page)
4063 *resp_len = req->r_ops[0].outdata_len;
4064 }
4065
4066out_put_req:
4067 ceph_osdc_put_request(req);
4068 return ret;
4069}
4070EXPORT_SYMBOL(ceph_osdc_call);
4071
f24e9980
SW		 4072/*
4073 * init, shutdown
4074 */
4075int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
4076{
4077 int err;
4078
4079 dout("init\n");
4080 osdc->client = client;
5aea3dcd 4081 init_rwsem(&osdc->lock);
f24e9980 4082 osdc->osds = RB_ROOT;
f5a2041b 4083 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 4084 spin_lock_init(&osdc->osd_lru_lock);
5aea3dcd
ID		 4085 osd_init(&osdc->homeless_osd);
4086 osdc->homeless_osd.o_osdc = osdc;
4087 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
264048af 4088 osdc->last_linger_id = CEPH_LINGER_ID_START;
922dab61 4089 osdc->linger_requests = RB_ROOT;
4609245e
ID		 4090 osdc->map_checks = RB_ROOT;
4091 osdc->linger_map_checks = RB_ROOT;
f24e9980 4092 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b
YS		 4093 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
4094
5f44f142 4095 err = -ENOMEM;
e5253a7b
ID		 4096 osdc->osdmap = ceph_osdmap_alloc();
4097 if (!osdc->osdmap)
4098 goto out;
4099
9e767adb
ID		 4100 osdc->req_mempool = mempool_create_slab_pool(10,
4101 ceph_osd_request_cache);
f24e9980 4102 if (!osdc->req_mempool)
e5253a7b 4103 goto out_map;
f24e9980 4104
d50b409f 4105 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
711da55d 4106 PAGE_SIZE, 10, true, "osd_op");
f24e9980 4107 if (err < 0)
5f44f142 4108 goto out_mempool;
d50b409f 4109 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
711da55d 4110 PAGE_SIZE, 10, true, "osd_op_reply");
c16e7869
SW		 4111 if (err < 0)
4112 goto out_msgpool;
a40c4f10 4113
dbcae088 4114 err = -ENOMEM;
a40c4f10 4115 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 4116 if (!osdc->notify_wq)
c172ec5c
ID		 4117 goto out_msgpool_reply;
4118
fbca9635
ID		 4119 schedule_delayed_work(&osdc->timeout_work,
4120 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 4121 schedule_delayed_work(&osdc->osds_timeout_work,
4122 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
4123
f24e9980 4124 return 0;
5f44f142 4125
c172ec5c
ID		 4126out_msgpool_reply:
4127 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 4128out_msgpool:
4129 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 4130out_mempool:
4131 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 4132out_map:
4133 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 4134out:
4135 return err;
f24e9980
SW		 4136}
4137
4138void ceph_osdc_stop(struct ceph_osd_client *osdc)
4139{
a40c4f10
YS		 4140 flush_workqueue(osdc->notify_wq);
4141 destroy_workqueue(osdc->notify_wq);
f24e9980 4142 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 4143 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f 4144
5aea3dcd 4145 down_write(&osdc->lock);
42a2c09f
ID		 4146 while (!RB_EMPTY_ROOT(&osdc->osds)) {
4147 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
4148 struct ceph_osd, o_node);
5aea3dcd 4149 close_osd(osd);
42a2c09f 4150 }
5aea3dcd
ID		 4151 up_write(&osdc->lock);
4152 WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1);
4153 osd_cleanup(&osdc->homeless_osd);
4154
4155 WARN_ON(!list_empty(&osdc->osd_lru));
922dab61 4156 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4609245e
ID		 4157 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
4158 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5aea3dcd
ID		 4159 WARN_ON(atomic_read(&osdc->num_requests));
4160 WARN_ON(atomic_read(&osdc->num_homeless));
42a2c09f 4161
e5253a7b 4162 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 4163 mempool_destroy(osdc->req_mempool);
4164 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 4165 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 4166}
4167
4168/*
4169 * Read some contiguous pages. If we cross a stripe boundary, shorten
4170 * *plen. Return number of bytes read, or error.
4171 */
4172int ceph_osdc_readpages(struct ceph_osd_client *osdc,
4173 struct ceph_vino vino, struct ceph_file_layout *layout,
4174 u64 off, u64 *plen,
4175 u32 truncate_seq, u64 truncate_size,
b7495fc2 4176 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 4177{
4178 struct ceph_osd_request *req;
4179 int rc = 0;
4180
4181 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
4182 vino.snap, off, *plen);
715e4cd4 4183 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 4184 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 4185 NULL, truncate_seq, truncate_size,
153e5167 4186 false);
6816282d
SW		 4187 if (IS_ERR(req))
4188 return PTR_ERR(req);
f24e9980
SW		 4189
4190 /* it may be a short read due to an object boundary */
406e2c9f 4191 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 4192 pages, *plen, page_align, false, false);
f24e9980 4193
e0c59487 4194 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 4195 off, *plen, *plen, page_align);
f24e9980
SW		 4196
4197 rc = ceph_osdc_start_request(osdc, req, false);
4198 if (!rc)
4199 rc = ceph_osdc_wait_request(osdc, req);
4200
4201 ceph_osdc_put_request(req);
4202 dout("readpages result %d\n", rc);
4203 return rc;
4204}
3d14c5d2 4205EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 4206
4207/*
4208 * do a synchronous write on N pages
4209 */
4210int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
4211 struct ceph_file_layout *layout,
4212 struct ceph_snap_context *snapc,
4213 u64 off, u64 len,
4214 u32 truncate_seq, u64 truncate_size,
4215 struct timespec *mtime,
24808826 4216 struct page **pages, int num_pages)
f24e9980
SW		 4217{
4218 struct ceph_osd_request *req;
4219 int rc = 0;
b7495fc2 4220 int page_align = off & ~PAGE_MASK;
f24e9980 4221
715e4cd4 4222 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
f24e9980 4223 CEPH_OSD_OP_WRITE,
24808826 4224 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 4225 snapc, truncate_seq, truncate_size,
153e5167 4226 true);
6816282d
SW		 4227 if (IS_ERR(req))
4228 return PTR_ERR(req);
f24e9980
SW		 4229
4230 /* it may be a short write due to an object boundary */
406e2c9f 4231 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 4232 false, false);
4233 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 4234
bb873b53 4235 req->r_mtime = *mtime;
87f979d3 4236 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 4237 if (!rc)
4238 rc = ceph_osdc_wait_request(osdc, req);
4239
4240 ceph_osdc_put_request(req);
4241 if (rc == 0)
4242 rc = len;
4243 dout("writepages result %d\n", rc);
4244 return rc;
4245}
3d14c5d2 4246EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 4247
5522ae0b
AE		 4248int ceph_osdc_setup(void)
4249{
3f1af42a
ID		 4250 size_t size = sizeof(struct ceph_osd_request) +
4251 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
4252
5522ae0b 4253 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 4254 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
4255 0, 0, NULL);
5522ae0b
AE		 4256
4257 return ceph_osd_request_cache ? 0 : -ENOMEM;
4258}
4259EXPORT_SYMBOL(ceph_osdc_setup);
4260
4261void ceph_osdc_cleanup(void)
4262{
4263 BUG_ON(!ceph_osd_request_cache);
4264 kmem_cache_destroy(ceph_osd_request_cache);
4265 ceph_osd_request_cache = NULL;
4266}
4267EXPORT_SYMBOL(ceph_osdc_cleanup);
4268
f24e9980
SW		 4269/*
4270 * handle incoming message
4271 */
4272static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
4273{
4274 struct ceph_osd *osd = con->private;
5aea3dcd 4275 struct ceph_osd_client *osdc = osd->o_osdc;
f24e9980
SW		 4276 int type = le16_to_cpu(msg->hdr.type);
4277
f24e9980
SW		 4278 switch (type) {
4279 case CEPH_MSG_OSD_MAP:
4280 ceph_osdc_handle_map(osdc, msg);
4281 break;
4282 case CEPH_MSG_OSD_OPREPLY:
5aea3dcd 4283 handle_reply(osd, msg);
f24e9980 4284 break;
a40c4f10
YS		 4285 case CEPH_MSG_WATCH_NOTIFY:
4286 handle_watch_notify(osdc, msg);
4287 break;
f24e9980
SW		 4288
4289 default:
4290 pr_err("received unknown message type %d %s\n", type,
4291 ceph_msg_type_name(type));
4292 }
5aea3dcd 4293
f24e9980
SW		 4294 ceph_msg_put(msg);
4295}
4296
5b3a4db3 4297/*
d15f9d69
ID		 4298 * Lookup and return message for incoming reply. Don't try to do
4299 * anything about a larger than preallocated data portion of the
4300 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 4301 */
4302static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 4303 struct ceph_msg_header *hdr,
4304 int *skip)
f24e9980
SW		 4305{
4306 struct ceph_osd *osd = con->private;
4307 struct ceph_osd_client *osdc = osd->o_osdc;
5aea3dcd 4308 struct ceph_msg *m = NULL;
0547a9b3 4309 struct ceph_osd_request *req;
3f0a4ac5 4310 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 4311 int data_len = le32_to_cpu(hdr->data_len);
5aea3dcd 4312 u64 tid = le64_to_cpu(hdr->tid);
f24e9980 4313
5aea3dcd
ID		 4314 down_read(&osdc->lock);
4315 if (!osd_registered(osd)) {
4316 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
4317 *skip = 1;
4318 goto out_unlock_osdc;
4319 }
4320 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
4321
4322 mutex_lock(&osd->lock);
4323 req = lookup_request(&osd->o_requests, tid);
0547a9b3 4324 if (!req) {
cd8140c6
ID		 4325 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
4326 osd->o_osd, tid);
d15f9d69 4327 *skip = 1;
5aea3dcd 4328 goto out_unlock_session;
0547a9b3 4329 }
c16e7869 4330
ace6d3a9 4331 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 4332
f2be82b0 4333 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 4334 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
4335 __func__, osd->o_osd, req->r_tid, front_len,
4336 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 4337 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
4338 false);
a79832f2 4339 if (!m)
5aea3dcd 4340 goto out_unlock_session;
c16e7869
SW		 4341 ceph_msg_put(req->r_reply);
4342 req->r_reply = m;
4343 }
0fff87ec 4344
d15f9d69
ID		 4345 if (data_len > req->r_reply->data_length) {
4346 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
4347 __func__, osd->o_osd, req->r_tid, data_len,
4348 req->r_reply->data_length);
4349 m = NULL;
4350 *skip = 1;
5aea3dcd 4351 goto out_unlock_session;
0547a9b3 4352 }
d15f9d69
ID		 4353
4354 m = ceph_msg_get(req->r_reply);
c16e7869 4355 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3 4356
5aea3dcd
ID		 4357out_unlock_session:
4358 mutex_unlock(&osd->lock);
4359out_unlock_osdc:
4360 up_read(&osdc->lock);
2450418c 4361 return m;
5b3a4db3
SW		 4362}
4363
19079203
ID		 4364/*
4365 * TODO: switch to a msg-owned pagelist
4366 */
4367static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
4368{
4369 struct ceph_msg *m;
4370 int type = le16_to_cpu(hdr->type);
4371 u32 front_len = le32_to_cpu(hdr->front_len);
4372 u32 data_len = le32_to_cpu(hdr->data_len);
4373
4374 m = ceph_msg_new(type, front_len, GFP_NOIO, false);
4375 if (!m)
4376 return NULL;
4377
4378 if (data_len) {
4379 struct page **pages;
4380 struct ceph_osd_data osd_data;
4381
4382 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
4383 GFP_NOIO);
c22e853a 4384 if (IS_ERR(pages)) {
19079203
ID		 4385 ceph_msg_put(m);
4386 return NULL;
4387 }
4388
4389 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
4390 false);
4391 ceph_osdc_msg_data_add(m, &osd_data);
4392 }
4393
4394 return m;
4395}
4396
5b3a4db3
SW		 4397static struct ceph_msg *alloc_msg(struct ceph_connection *con,
4398 struct ceph_msg_header *hdr,
4399 int *skip)
4400{
4401 struct ceph_osd *osd = con->private;
4402 int type = le16_to_cpu(hdr->type);
5b3a4db3 4403
1c20f2d2 4404 *skip = 0;
5b3a4db3
SW		 4405 switch (type) {
4406 case CEPH_MSG_OSD_MAP:
a40c4f10 4407 case CEPH_MSG_WATCH_NOTIFY:
19079203 4408 return alloc_msg_with_page_vector(hdr);
5b3a4db3
SW		 4409 case CEPH_MSG_OSD_OPREPLY:
4410 return get_reply(con, hdr, skip);
4411 default:
5aea3dcd
ID		 4412 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
4413 osd->o_osd, type);
5b3a4db3
SW		 4414 *skip = 1;
4415 return NULL;
4416 }
f24e9980
SW		 4417}
4418
4419/*
4420 * Wrappers to refcount containing ceph_osd struct
4421 */
4422static struct ceph_connection *get_osd_con(struct ceph_connection *con)
4423{
4424 struct ceph_osd *osd = con->private;
4425 if (get_osd(osd))
4426 return con;
4427 return NULL;
4428}
4429
4430static void put_osd_con(struct ceph_connection *con)
4431{
4432 struct ceph_osd *osd = con->private;
4433 put_osd(osd);
4434}
4435
4e7a5dcd
SW		 4436/*
4437 * authentication
4438 */
a3530df3
AE		 4439/*
4440 * Note: returned pointer is the address of a structure that's
4441 * managed separately. Caller must *not* attempt to free it.
4442 */
4443static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 4444 int *proto, int force_new)
4e7a5dcd
SW		 4445{
4446 struct ceph_osd *o = con->private;
4447 struct ceph_osd_client *osdc = o->o_osdc;
4448 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 4449 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 4450
74f1869f 4451 if (force_new && auth->authorizer) {
6c1ea260 4452 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 4453 auth->authorizer = NULL;
4454 }
27859f97
SW		 4455 if (!auth->authorizer) {
4456 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
4457 auth);
4e7a5dcd 4458 if (ret)
a3530df3 4459 return ERR_PTR(ret);
27859f97
SW		 4460 } else {
4461 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 4462 auth);
4463 if (ret)
4464 return ERR_PTR(ret);
4e7a5dcd 4465 }
4e7a5dcd 4466 *proto = ac->protocol;
74f1869f 4467
a3530df3 4468 return auth;
4e7a5dcd
SW		 4469}
4470
4471
0dde5848 4472static int verify_authorizer_reply(struct ceph_connection *con)
4e7a5dcd
SW		 4473{
4474 struct ceph_osd *o = con->private;
4475 struct ceph_osd_client *osdc = o->o_osdc;
4476 struct ceph_auth_client *ac = osdc->client->monc.auth;
4477
0dde5848 4478 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
4e7a5dcd
SW		 4479}
4480
9bd2e6f8
SW		 4481static int invalidate_authorizer(struct ceph_connection *con)
4482{
4483 struct ceph_osd *o = con->private;
4484 struct ceph_osd_client *osdc = o->o_osdc;
4485 struct ceph_auth_client *ac = osdc->client->monc.auth;
4486
27859f97 4487 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 4488 return ceph_monc_validate_auth(&osdc->client->monc);
4489}
4e7a5dcd 4490
79dbd1ba 4491static int osd_sign_message(struct ceph_msg *msg)
33d07337 4492{
79dbd1ba 4493 struct ceph_osd *o = msg->con->private;
33d07337 4494 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 4495
33d07337
YZ		 4496 return ceph_auth_sign_message(auth, msg);
4497}
4498
79dbd1ba 4499static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 4500{
79dbd1ba 4501 struct ceph_osd *o = msg->con->private;
33d07337 4502 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 4503
33d07337
YZ		 4504 return ceph_auth_check_message_signature(auth, msg);
4505}
4506
9e32789f 4507static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 4508 .get = get_osd_con,
4509 .put = put_osd_con,
4510 .dispatch = dispatch,
4e7a5dcd
SW		 4511 .get_authorizer = get_authorizer,
4512 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 4513 .invalidate_authorizer = invalidate_authorizer,
f24e9980 4514 .alloc_msg = alloc_msg,
79dbd1ba
ID		 4515 .sign_message = osd_sign_message,
4516 .check_message_signature = osd_check_message_signature,
5aea3dcd 4517 .fault = osd_fault,
f24e9980 4518};
ubuntu-zesty-kernel mirror