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libceph: drop len argument of *verify_authorizer_reply()
[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);
463 init_completion(&req->r_safe_completion);
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
1728static void __finish_request(struct ceph_osd_request *req)
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
1750static void finish_request(struct ceph_osd_request *req)
1751{
1752 __finish_request(req);
1753 ceph_osdc_put_request(req);
0bbfdfe8
ID		 1754}
1755
fe5da05e
ID		 1756static void __complete_request(struct ceph_osd_request *req)
1757{
1758 if (req->r_callback)
1759 req->r_callback(req);
1760 else
1761 complete_all(&req->r_completion);
1762}
1763
4609245e
ID		 1764/*
1765 * Note that this is open-coded in handle_reply(), which has to deal
1766 * with ack vs commit, dup acks, etc.
1767 */
1768static void complete_request(struct ceph_osd_request *req, int err)
1769{
1770 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
1771
1772 req->r_result = err;
1773 __finish_request(req);
1774 __complete_request(req);
1775 complete_all(&req->r_safe_completion);
1776 ceph_osdc_put_request(req);
1777}
1778
1779static void cancel_map_check(struct ceph_osd_request *req)
1780{
1781 struct ceph_osd_client *osdc = req->r_osdc;
1782 struct ceph_osd_request *lookup_req;
1783
1784 verify_osdc_wrlocked(osdc);
1785
1786 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
1787 if (!lookup_req)
1788 return;
1789
1790 WARN_ON(lookup_req != req);
1791 erase_request_mc(&osdc->map_checks, req);
1792 ceph_osdc_put_request(req);
1793}
1794
5aea3dcd
ID		 1795static void cancel_request(struct ceph_osd_request *req)
1796{
1797 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
1798
4609245e 1799 cancel_map_check(req);
5aea3dcd
ID		 1800 finish_request(req);
1801}
1802
4609245e
ID		 1803static void check_pool_dne(struct ceph_osd_request *req)
1804{
1805 struct ceph_osd_client *osdc = req->r_osdc;
1806 struct ceph_osdmap *map = osdc->osdmap;
1807
1808 verify_osdc_wrlocked(osdc);
1809 WARN_ON(!map->epoch);
1810
1811 if (req->r_attempts) {
1812 /*
1813 * We sent a request earlier, which means that
1814 * previously the pool existed, and now it does not
1815 * (i.e., it was deleted).
1816 */
1817 req->r_map_dne_bound = map->epoch;
1818 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
1819 req->r_tid);
1820 } else {
1821 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
1822 req, req->r_tid, req->r_map_dne_bound, map->epoch);
1823 }
1824
1825 if (req->r_map_dne_bound) {
1826 if (map->epoch >= req->r_map_dne_bound) {
1827 /* we had a new enough map */
1828 pr_info_ratelimited("tid %llu pool does not exist\n",
1829 req->r_tid);
1830 complete_request(req, -ENOENT);
1831 }
1832 } else {
1833 send_map_check(req);
1834 }
1835}
1836
1837static void map_check_cb(struct ceph_mon_generic_request *greq)
1838{
1839 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
1840 struct ceph_osd_request *req;
1841 u64 tid = greq->private_data;
1842
1843 WARN_ON(greq->result || !greq->u.newest);
1844
1845 down_write(&osdc->lock);
1846 req = lookup_request_mc(&osdc->map_checks, tid);
1847 if (!req) {
1848 dout("%s tid %llu dne\n", __func__, tid);
1849 goto out_unlock;
1850 }
1851
1852 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
1853 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
1854 if (!req->r_map_dne_bound)
1855 req->r_map_dne_bound = greq->u.newest;
1856 erase_request_mc(&osdc->map_checks, req);
1857 check_pool_dne(req);
1858
1859 ceph_osdc_put_request(req);
1860out_unlock:
1861 up_write(&osdc->lock);
1862}
1863
1864static void send_map_check(struct ceph_osd_request *req)
1865{
1866 struct ceph_osd_client *osdc = req->r_osdc;
1867 struct ceph_osd_request *lookup_req;
1868 int ret;
1869
1870 verify_osdc_wrlocked(osdc);
1871
1872 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
1873 if (lookup_req) {
1874 WARN_ON(lookup_req != req);
1875 return;
1876 }
1877
1878 ceph_osdc_get_request(req);
1879 insert_request_mc(&osdc->map_checks, req);
1880 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
1881 map_check_cb, req->r_tid);
1882 WARN_ON(ret);
1883}
1884
922dab61
ID		 1885/*
1886 * lingering requests, watch/notify v2 infrastructure
1887 */
1888static void linger_release(struct kref *kref)
1889{
1890 struct ceph_osd_linger_request *lreq =
1891 container_of(kref, struct ceph_osd_linger_request, kref);
1892
1893 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
1894 lreq->reg_req, lreq->ping_req);
1895 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
1896 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
4609245e 1897 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
922dab61 1898 WARN_ON(!list_empty(&lreq->scan_item));
b07d3c4b 1899 WARN_ON(!list_empty(&lreq->pending_lworks));
922dab61
ID		 1900 WARN_ON(lreq->osd);
1901
1902 if (lreq->reg_req)
1903 ceph_osdc_put_request(lreq->reg_req);
1904 if (lreq->ping_req)
1905 ceph_osdc_put_request(lreq->ping_req);
1906 target_destroy(&lreq->t);
1907 kfree(lreq);
1908}
1909
1910static void linger_put(struct ceph_osd_linger_request *lreq)
1911{
1912 if (lreq)
1913 kref_put(&lreq->kref, linger_release);
1914}
1915
1916static struct ceph_osd_linger_request *
1917linger_get(struct ceph_osd_linger_request *lreq)
1918{
1919 kref_get(&lreq->kref);
1920 return lreq;
1921}
1922
1923static struct ceph_osd_linger_request *
1924linger_alloc(struct ceph_osd_client *osdc)
1925{
1926 struct ceph_osd_linger_request *lreq;
1927
1928 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
1929 if (!lreq)
1930 return NULL;
1931
1932 kref_init(&lreq->kref);
1933 mutex_init(&lreq->lock);
1934 RB_CLEAR_NODE(&lreq->node);
1935 RB_CLEAR_NODE(&lreq->osdc_node);
4609245e 1936 RB_CLEAR_NODE(&lreq->mc_node);
922dab61 1937 INIT_LIST_HEAD(&lreq->scan_item);
b07d3c4b 1938 INIT_LIST_HEAD(&lreq->pending_lworks);
922dab61 1939 init_completion(&lreq->reg_commit_wait);
19079203 1940 init_completion(&lreq->notify_finish_wait);
922dab61
ID		 1941
1942 lreq->osdc = osdc;
1943 target_init(&lreq->t);
1944
1945 dout("%s lreq %p\n", __func__, lreq);
1946 return lreq;
1947}
1948
1949DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
1950DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
4609245e 1951DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
922dab61
ID		 1952
1953/*
1954 * Create linger request <-> OSD session relation.
1955 *
1956 * @lreq has to be registered, @osd may be homeless.
1957 */
1958static void link_linger(struct ceph_osd *osd,
1959 struct ceph_osd_linger_request *lreq)
1960{
1961 verify_osd_locked(osd);
1962 WARN_ON(!lreq->linger_id || lreq->osd);
1963 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
1964 osd->o_osd, lreq, lreq->linger_id);
1965
1966 if (!osd_homeless(osd))
1967 __remove_osd_from_lru(osd);
1968 else
1969 atomic_inc(&osd->o_osdc->num_homeless);
1970
1971 get_osd(osd);
1972 insert_linger(&osd->o_linger_requests, lreq);
1973 lreq->osd = osd;
1974}
1975
1976static void unlink_linger(struct ceph_osd *osd,
1977 struct ceph_osd_linger_request *lreq)
1978{
1979 verify_osd_locked(osd);
1980 WARN_ON(lreq->osd != osd);
1981 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
1982 osd->o_osd, lreq, lreq->linger_id);
1983
1984 lreq->osd = NULL;
1985 erase_linger(&osd->o_linger_requests, lreq);
1986 put_osd(osd);
1987
1988 if (!osd_homeless(osd))
1989 maybe_move_osd_to_lru(osd);
1990 else
1991 atomic_dec(&osd->o_osdc->num_homeless);
1992}
1993
1994static bool __linger_registered(struct ceph_osd_linger_request *lreq)
1995{
1996 verify_osdc_locked(lreq->osdc);
1997
1998 return !RB_EMPTY_NODE(&lreq->osdc_node);
1999}
2000
2001static bool linger_registered(struct ceph_osd_linger_request *lreq)
2002{
2003 struct ceph_osd_client *osdc = lreq->osdc;
2004 bool registered;
2005
2006 down_read(&osdc->lock);
2007 registered = __linger_registered(lreq);
2008 up_read(&osdc->lock);
2009
2010 return registered;
2011}
2012
2013static void linger_register(struct ceph_osd_linger_request *lreq)
2014{
2015 struct ceph_osd_client *osdc = lreq->osdc;
2016
2017 verify_osdc_wrlocked(osdc);
2018 WARN_ON(lreq->linger_id);
2019
2020 linger_get(lreq);
2021 lreq->linger_id = ++osdc->last_linger_id;
2022 insert_linger_osdc(&osdc->linger_requests, lreq);
2023}
2024
2025static void linger_unregister(struct ceph_osd_linger_request *lreq)
2026{
2027 struct ceph_osd_client *osdc = lreq->osdc;
2028
2029 verify_osdc_wrlocked(osdc);
2030
2031 erase_linger_osdc(&osdc->linger_requests, lreq);
2032 linger_put(lreq);
2033}
2034
2035static void cancel_linger_request(struct ceph_osd_request *req)
2036{
2037 struct ceph_osd_linger_request *lreq = req->r_priv;
2038
2039 WARN_ON(!req->r_linger);
2040 cancel_request(req);
2041 linger_put(lreq);
2042}
2043
2044struct linger_work {
2045 struct work_struct work;
2046 struct ceph_osd_linger_request *lreq;
b07d3c4b
ID		 2047 struct list_head pending_item;
2048 unsigned long queued_stamp;
922dab61
ID		 2049
2050 union {
2051 struct {
2052 u64 notify_id;
2053 u64 notifier_id;
2054 void *payload; /* points into @msg front */
2055 size_t payload_len;
2056
2057 struct ceph_msg *msg; /* for ceph_msg_put() */
2058 } notify;
2059 struct {
2060 int err;
2061 } error;
2062 };
2063};
2064
2065static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2066 work_func_t workfn)
2067{
2068 struct linger_work *lwork;
2069
2070 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2071 if (!lwork)
2072 return NULL;
2073
2074 INIT_WORK(&lwork->work, workfn);
b07d3c4b 2075 INIT_LIST_HEAD(&lwork->pending_item);
922dab61
ID		 2076 lwork->lreq = linger_get(lreq);
2077
2078 return lwork;
2079}
2080
2081static void lwork_free(struct linger_work *lwork)
2082{
2083 struct ceph_osd_linger_request *lreq = lwork->lreq;
2084
b07d3c4b
ID		 2085 mutex_lock(&lreq->lock);
2086 list_del(&lwork->pending_item);
2087 mutex_unlock(&lreq->lock);
2088
922dab61
ID		 2089 linger_put(lreq);
2090 kfree(lwork);
2091}
2092
2093static void lwork_queue(struct linger_work *lwork)
2094{
2095 struct ceph_osd_linger_request *lreq = lwork->lreq;
2096 struct ceph_osd_client *osdc = lreq->osdc;
2097
2098 verify_lreq_locked(lreq);
b07d3c4b
ID		 2099 WARN_ON(!list_empty(&lwork->pending_item));
2100
2101 lwork->queued_stamp = jiffies;
2102 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
922dab61
ID		 2103 queue_work(osdc->notify_wq, &lwork->work);
2104}
2105
2106static void do_watch_notify(struct work_struct *w)
2107{
2108 struct linger_work *lwork = container_of(w, struct linger_work, work);
2109 struct ceph_osd_linger_request *lreq = lwork->lreq;
2110
2111 if (!linger_registered(lreq)) {
2112 dout("%s lreq %p not registered\n", __func__, lreq);
2113 goto out;
2114 }
2115
19079203 2116 WARN_ON(!lreq->is_watch);
922dab61
ID		 2117 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2118 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2119 lwork->notify.payload_len);
2120 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2121 lwork->notify.notifier_id, lwork->notify.payload,
2122 lwork->notify.payload_len);
2123
2124out:
2125 ceph_msg_put(lwork->notify.msg);
2126 lwork_free(lwork);
2127}
2128
2129static void do_watch_error(struct work_struct *w)
2130{
2131 struct linger_work *lwork = container_of(w, struct linger_work, work);
2132 struct ceph_osd_linger_request *lreq = lwork->lreq;
2133
2134 if (!linger_registered(lreq)) {
2135 dout("%s lreq %p not registered\n", __func__, lreq);
2136 goto out;
2137 }
2138
2139 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2140 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2141
2142out:
2143 lwork_free(lwork);
2144}
2145
2146static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2147{
2148 struct linger_work *lwork;
2149
2150 lwork = lwork_alloc(lreq, do_watch_error);
2151 if (!lwork) {
2152 pr_err("failed to allocate error-lwork\n");
2153 return;
2154 }
2155
2156 lwork->error.err = lreq->last_error;
2157 lwork_queue(lwork);
2158}
2159
2160static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2161 int result)
2162{
2163 if (!completion_done(&lreq->reg_commit_wait)) {
2164 lreq->reg_commit_error = (result <= 0 ? result : 0);
2165 complete_all(&lreq->reg_commit_wait);
2166 }
2167}
2168
2169static void linger_commit_cb(struct ceph_osd_request *req)
2170{
2171 struct ceph_osd_linger_request *lreq = req->r_priv;
2172
2173 mutex_lock(&lreq->lock);
2174 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2175 lreq->linger_id, req->r_result);
2176 WARN_ON(!__linger_registered(lreq));
2177 linger_reg_commit_complete(lreq, req->r_result);
2178 lreq->committed = true;
2179
19079203
ID		 2180 if (!lreq->is_watch) {
2181 struct ceph_osd_data *osd_data =
2182 osd_req_op_data(req, 0, notify, response_data);
2183 void *p = page_address(osd_data->pages[0]);
2184
2185 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2186 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2187
2188 /* make note of the notify_id */
2189 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2190 lreq->notify_id = ceph_decode_64(&p);
2191 dout("lreq %p notify_id %llu\n", lreq,
2192 lreq->notify_id);
2193 } else {
2194 dout("lreq %p no notify_id\n", lreq);
2195 }
2196 }
2197
922dab61
ID		 2198 mutex_unlock(&lreq->lock);
2199 linger_put(lreq);
2200}
2201
2202static int normalize_watch_error(int err)
2203{
2204 /*
2205 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2206 * notification and a failure to reconnect because we raced with
2207 * the delete appear the same to the user.
2208 */
2209 if (err == -ENOENT)
2210 err = -ENOTCONN;
2211
2212 return err;
2213}
2214
2215static void linger_reconnect_cb(struct ceph_osd_request *req)
2216{
2217 struct ceph_osd_linger_request *lreq = req->r_priv;
2218
2219 mutex_lock(&lreq->lock);
2220 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2221 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2222 if (req->r_result < 0) {
2223 if (!lreq->last_error) {
2224 lreq->last_error = normalize_watch_error(req->r_result);
2225 queue_watch_error(lreq);
2226 }
2227 }
2228
2229 mutex_unlock(&lreq->lock);
2230 linger_put(lreq);
2231}
2232
2233static void send_linger(struct ceph_osd_linger_request *lreq)
2234{
2235 struct ceph_osd_request *req = lreq->reg_req;
2236 struct ceph_osd_req_op *op = &req->r_ops[0];
2237
2238 verify_osdc_wrlocked(req->r_osdc);
2239 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2240
2241 if (req->r_osd)
2242 cancel_linger_request(req);
2243
2244 request_reinit(req);
2245 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2246 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2247 req->r_flags = lreq->t.flags;
2248 req->r_mtime = lreq->mtime;
2249
2250 mutex_lock(&lreq->lock);
19079203 2251 if (lreq->is_watch && lreq->committed) {
922dab61
ID		 2252 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2253 op->watch.cookie != lreq->linger_id);
2254 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2255 op->watch.gen = ++lreq->register_gen;
2256 dout("lreq %p reconnect register_gen %u\n", lreq,
2257 op->watch.gen);
2258 req->r_callback = linger_reconnect_cb;
2259 } else {
19079203
ID		 2260 if (!lreq->is_watch)
2261 lreq->notify_id = 0;
2262 else
2263 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
922dab61
ID		 2264 dout("lreq %p register\n", lreq);
2265 req->r_callback = linger_commit_cb;
2266 }
2267 mutex_unlock(&lreq->lock);
2268
2269 req->r_priv = linger_get(lreq);
2270 req->r_linger = true;
2271
2272 submit_request(req, true);
2273}
2274
2275static void linger_ping_cb(struct ceph_osd_request *req)
2276{
2277 struct ceph_osd_linger_request *lreq = req->r_priv;
2278
2279 mutex_lock(&lreq->lock);
2280 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
2281 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
2282 lreq->last_error);
2283 if (lreq->register_gen == req->r_ops[0].watch.gen) {
b07d3c4b
ID		 2284 if (!req->r_result) {
2285 lreq->watch_valid_thru = lreq->ping_sent;
2286 } else if (!lreq->last_error) {
922dab61
ID		 2287 lreq->last_error = normalize_watch_error(req->r_result);
2288 queue_watch_error(lreq);
2289 }
2290 } else {
2291 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
2292 lreq->register_gen, req->r_ops[0].watch.gen);
2293 }
2294
2295 mutex_unlock(&lreq->lock);
2296 linger_put(lreq);
2297}
2298
2299static void send_linger_ping(struct ceph_osd_linger_request *lreq)
2300{
2301 struct ceph_osd_client *osdc = lreq->osdc;
2302 struct ceph_osd_request *req = lreq->ping_req;
2303 struct ceph_osd_req_op *op = &req->r_ops[0];
2304
b7ec35b3 2305 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
922dab61
ID		 2306 dout("%s PAUSERD\n", __func__);
2307 return;
2308 }
2309
2310 lreq->ping_sent = jiffies;
2311 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
2312 __func__, lreq, lreq->linger_id, lreq->ping_sent,
2313 lreq->register_gen);
2314
2315 if (req->r_osd)
2316 cancel_linger_request(req);
2317
2318 request_reinit(req);
2319 target_copy(&req->r_t, &lreq->t);
2320
2321 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2322 op->watch.cookie != lreq->linger_id ||
2323 op->watch.op != CEPH_OSD_WATCH_OP_PING);
2324 op->watch.gen = lreq->register_gen;
2325 req->r_callback = linger_ping_cb;
2326 req->r_priv = linger_get(lreq);
2327 req->r_linger = true;
2328
2329 ceph_osdc_get_request(req);
2330 account_request(req);
2331 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2332 link_request(lreq->osd, req);
2333 send_request(req);
2334}
2335
2336static void linger_submit(struct ceph_osd_linger_request *lreq)
2337{
2338 struct ceph_osd_client *osdc = lreq->osdc;
2339 struct ceph_osd *osd;
2340
2341 calc_target(osdc, &lreq->t, &lreq->last_force_resend, false);
2342 osd = lookup_create_osd(osdc, lreq->t.osd, true);
2343 link_linger(osd, lreq);
2344
2345 send_linger(lreq);
2346}
2347
4609245e
ID		 2348static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
2349{
2350 struct ceph_osd_client *osdc = lreq->osdc;
2351 struct ceph_osd_linger_request *lookup_lreq;
2352
2353 verify_osdc_wrlocked(osdc);
2354
2355 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2356 lreq->linger_id);
2357 if (!lookup_lreq)
2358 return;
2359
2360 WARN_ON(lookup_lreq != lreq);
2361 erase_linger_mc(&osdc->linger_map_checks, lreq);
2362 linger_put(lreq);
2363}
2364
922dab61
ID		 2365/*
2366 * @lreq has to be both registered and linked.
2367 */
2368static void __linger_cancel(struct ceph_osd_linger_request *lreq)
2369{
19079203 2370 if (lreq->is_watch && lreq->ping_req->r_osd)
922dab61
ID		 2371 cancel_linger_request(lreq->ping_req);
2372 if (lreq->reg_req->r_osd)
2373 cancel_linger_request(lreq->reg_req);
4609245e 2374 cancel_linger_map_check(lreq);
922dab61
ID		 2375 unlink_linger(lreq->osd, lreq);
2376 linger_unregister(lreq);
2377}
2378
2379static void linger_cancel(struct ceph_osd_linger_request *lreq)
2380{
2381 struct ceph_osd_client *osdc = lreq->osdc;
2382
2383 down_write(&osdc->lock);
2384 if (__linger_registered(lreq))
2385 __linger_cancel(lreq);
2386 up_write(&osdc->lock);
2387}
2388
4609245e
ID		 2389static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
2390
2391static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
2392{
2393 struct ceph_osd_client *osdc = lreq->osdc;
2394 struct ceph_osdmap *map = osdc->osdmap;
2395
2396 verify_osdc_wrlocked(osdc);
2397 WARN_ON(!map->epoch);
2398
2399 if (lreq->register_gen) {
2400 lreq->map_dne_bound = map->epoch;
2401 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
2402 lreq, lreq->linger_id);
2403 } else {
2404 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
2405 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
2406 map->epoch);
2407 }
2408
2409 if (lreq->map_dne_bound) {
2410 if (map->epoch >= lreq->map_dne_bound) {
2411 /* we had a new enough map */
2412 pr_info("linger_id %llu pool does not exist\n",
2413 lreq->linger_id);
2414 linger_reg_commit_complete(lreq, -ENOENT);
2415 __linger_cancel(lreq);
2416 }
2417 } else {
2418 send_linger_map_check(lreq);
2419 }
2420}
2421
2422static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
2423{
2424 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2425 struct ceph_osd_linger_request *lreq;
2426 u64 linger_id = greq->private_data;
2427
2428 WARN_ON(greq->result || !greq->u.newest);
2429
2430 down_write(&osdc->lock);
2431 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
2432 if (!lreq) {
2433 dout("%s linger_id %llu dne\n", __func__, linger_id);
2434 goto out_unlock;
2435 }
2436
2437 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
2438 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
2439 greq->u.newest);
2440 if (!lreq->map_dne_bound)
2441 lreq->map_dne_bound = greq->u.newest;
2442 erase_linger_mc(&osdc->linger_map_checks, lreq);
2443 check_linger_pool_dne(lreq);
2444
2445 linger_put(lreq);
2446out_unlock:
2447 up_write(&osdc->lock);
2448}
2449
2450static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
2451{
2452 struct ceph_osd_client *osdc = lreq->osdc;
2453 struct ceph_osd_linger_request *lookup_lreq;
2454 int ret;
2455
2456 verify_osdc_wrlocked(osdc);
2457
2458 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2459 lreq->linger_id);
2460 if (lookup_lreq) {
2461 WARN_ON(lookup_lreq != lreq);
2462 return;
2463 }
2464
2465 linger_get(lreq);
2466 insert_linger_mc(&osdc->linger_map_checks, lreq);
2467 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2468 linger_map_check_cb, lreq->linger_id);
2469 WARN_ON(ret);
2470}
2471
922dab61
ID		 2472static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
2473{
2474 int ret;
2475
2476 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2477 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
2478 return ret ?: lreq->reg_commit_error;
2479}
2480
19079203
ID		 2481static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
2482{
2483 int ret;
2484
2485 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2486 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
2487 return ret ?: lreq->notify_finish_error;
2488}
2489
f24e9980 2490/*
fbca9635
ID		 2491 * Timeout callback, called every N seconds. When 1 or more OSD
2492 * requests has been active for more than N seconds, we send a keepalive
2493 * (tag + timestamp) to its OSD to ensure any communications channel
2494 * reset is detected.
f24e9980
SW		 2495 */
2496static void handle_timeout(struct work_struct *work)
2497{
2498 struct ceph_osd_client *osdc =
2499 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 2500 struct ceph_options *opts = osdc->client->options;
5aea3dcd
ID		 2501 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
2502 LIST_HEAD(slow_osds);
2503 struct rb_node *n, *p;
f24e9980 2504
5aea3dcd
ID		 2505 dout("%s osdc %p\n", __func__, osdc);
2506 down_write(&osdc->lock);
f24e9980 2507
422d2cb8
YS		 2508 /*
2509 * ping osds that are a bit slow. this ensures that if there
2510 * is a break in the TCP connection we will notice, and reopen
2511 * a connection with that osd (from the fault callback).
2512 */
5aea3dcd
ID		 2513 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2514 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2515 bool found = false;
2516
2517 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
2518 struct ceph_osd_request *req =
2519 rb_entry(p, struct ceph_osd_request, r_node);
2520
2521 if (time_before(req->r_stamp, cutoff)) {
2522 dout(" req %p tid %llu on osd%d is laggy\n",
2523 req, req->r_tid, osd->o_osd);
2524 found = true;
2525 }
2526 }
922dab61
ID		 2527 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
2528 struct ceph_osd_linger_request *lreq =
2529 rb_entry(p, struct ceph_osd_linger_request, node);
2530
2531 dout(" lreq %p linger_id %llu is served by osd%d\n",
2532 lreq, lreq->linger_id, osd->o_osd);
2533 found = true;
2534
2535 mutex_lock(&lreq->lock);
19079203 2536 if (lreq->is_watch && lreq->committed && !lreq->last_error)
922dab61
ID		 2537 send_linger_ping(lreq);
2538 mutex_unlock(&lreq->lock);
2539 }
422d2cb8 2540
5aea3dcd
ID		 2541 if (found)
2542 list_move_tail(&osd->o_keepalive_item, &slow_osds);
422d2cb8 2543 }
5aea3dcd
ID		 2544
2545 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
2546 maybe_request_map(osdc);
2547
422d2cb8 2548 while (!list_empty(&slow_osds)) {
5aea3dcd
ID		 2549 struct ceph_osd *osd = list_first_entry(&slow_osds,
2550 struct ceph_osd,
2551 o_keepalive_item);
422d2cb8 2552 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 2553 ceph_con_keepalive(&osd->o_con);
2554 }
2555
5aea3dcd 2556 up_write(&osdc->lock);
fbca9635
ID		 2557 schedule_delayed_work(&osdc->timeout_work,
2558 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 2559}
2560
f5a2041b
YS		 2561static void handle_osds_timeout(struct work_struct *work)
2562{
2563 struct ceph_osd_client *osdc =
2564 container_of(work, struct ceph_osd_client,
2565 osds_timeout_work.work);
a319bf56 2566 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 2567 struct ceph_osd *osd, *nosd;
f5a2041b 2568
42a2c09f 2569 dout("%s osdc %p\n", __func__, osdc);
5aea3dcd 2570 down_write(&osdc->lock);
42a2c09f
ID		 2571 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
2572 if (time_before(jiffies, osd->lru_ttl))
2573 break;
2574
5aea3dcd 2575 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
922dab61 2576 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
5aea3dcd 2577 close_osd(osd);
42a2c09f 2578 }
f5a2041b 2579
5aea3dcd 2580 up_write(&osdc->lock);
f5a2041b
YS		 2581 schedule_delayed_work(&osdc->osds_timeout_work,
2582 round_jiffies_relative(delay));
2583}
2584
205ee118
ID		 2585static int ceph_oloc_decode(void **p, void *end,
2586 struct ceph_object_locator *oloc)
2587{
2588 u8 struct_v, struct_cv;
2589 u32 len;
2590 void *struct_end;
2591 int ret = 0;
2592
2593 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
2594 struct_v = ceph_decode_8(p);
2595 struct_cv = ceph_decode_8(p);
2596 if (struct_v < 3) {
2597 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
2598 struct_v, struct_cv);
2599 goto e_inval;
2600 }
2601 if (struct_cv > 6) {
2602 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
2603 struct_v, struct_cv);
2604 goto e_inval;
2605 }
2606 len = ceph_decode_32(p);
2607 ceph_decode_need(p, end, len, e_inval);
2608 struct_end = *p + len;
2609
2610 oloc->pool = ceph_decode_64(p);
2611 *p += 4; /* skip preferred */
2612
2613 len = ceph_decode_32(p);
2614 if (len > 0) {
2615 pr_warn("ceph_object_locator::key is set\n");
2616 goto e_inval;
2617 }
2618
2619 if (struct_v >= 5) {
cd08e0a2
YZ		 2620 bool changed = false;
2621
205ee118
ID		 2622 len = ceph_decode_32(p);
2623 if (len > 0) {
30c156d9 2624 ceph_decode_need(p, end, len, e_inval);
cd08e0a2
YZ		 2625 if (!oloc->pool_ns ||
2626 ceph_compare_string(oloc->pool_ns, *p, len))
2627 changed = true;
30c156d9 2628 *p += len;
cd08e0a2
YZ		 2629 } else {
2630 if (oloc->pool_ns)
2631 changed = true;
2632 }
2633 if (changed) {
2634 /* redirect changes namespace */
2635 pr_warn("ceph_object_locator::nspace is changed\n");
2636 goto e_inval;
205ee118
ID		 2637 }
2638 }
2639
2640 if (struct_v >= 6) {
2641 s64 hash = ceph_decode_64(p);
2642 if (hash != -1) {
2643 pr_warn("ceph_object_locator::hash is set\n");
2644 goto e_inval;
2645 }
2646 }
2647
2648 /* skip the rest */
2649 *p = struct_end;
2650out:
2651 return ret;
2652
2653e_inval:
2654 ret = -EINVAL;
2655 goto out;
2656}
2657
2658static int ceph_redirect_decode(void **p, void *end,
2659 struct ceph_request_redirect *redir)
2660{
2661 u8 struct_v, struct_cv;
2662 u32 len;
2663 void *struct_end;
2664 int ret;
2665
2666 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
2667 struct_v = ceph_decode_8(p);
2668 struct_cv = ceph_decode_8(p);
2669 if (struct_cv > 1) {
2670 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
2671 struct_v, struct_cv);
2672 goto e_inval;
2673 }
2674 len = ceph_decode_32(p);
2675 ceph_decode_need(p, end, len, e_inval);
2676 struct_end = *p + len;
2677
2678 ret = ceph_oloc_decode(p, end, &redir->oloc);
2679 if (ret)
2680 goto out;
2681
2682 len = ceph_decode_32(p);
2683 if (len > 0) {
2684 pr_warn("ceph_request_redirect::object_name is set\n");
2685 goto e_inval;
2686 }
2687
2688 len = ceph_decode_32(p);
2689 *p += len; /* skip osd_instructions */
2690
2691 /* skip the rest */
2692 *p = struct_end;
2693out:
2694 return ret;
2695
2696e_inval:
2697 ret = -EINVAL;
2698 goto out;
2699}
2700
fe5da05e
ID		 2701struct MOSDOpReply {
2702 struct ceph_pg pgid;
2703 u64 flags;
2704 int result;
2705 u32 epoch;
2706 int num_ops;
2707 u32 outdata_len[CEPH_OSD_MAX_OPS];
2708 s32 rval[CEPH_OSD_MAX_OPS];
2709 int retry_attempt;
2710 struct ceph_eversion replay_version;
2711 u64 user_version;
2712 struct ceph_request_redirect redirect;
2713};
25845472 2714
fe5da05e 2715static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 2716{
fe5da05e
ID		 2717 void *p = msg->front.iov_base;
2718 void *const end = p + msg->front.iov_len;
2719 u16 version = le16_to_cpu(msg->hdr.version);
2720 struct ceph_eversion bad_replay_version;
b0b31a8f 2721 u8 decode_redir;
fe5da05e
ID		 2722 u32 len;
2723 int ret;
2724 int i;
1b83bef2 2725
fe5da05e
ID		 2726 ceph_decode_32_safe(&p, end, len, e_inval);
2727 ceph_decode_need(&p, end, len, e_inval);
2728 p += len; /* skip oid */
1b83bef2 2729
fe5da05e
ID		 2730 ret = ceph_decode_pgid(&p, end, &m->pgid);
2731 if (ret)
2732 return ret;
1b83bef2 2733
fe5da05e
ID		 2734 ceph_decode_64_safe(&p, end, m->flags, e_inval);
2735 ceph_decode_32_safe(&p, end, m->result, e_inval);
2736 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
2737 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
2738 p += sizeof(bad_replay_version);
2739 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 2740
fe5da05e
ID		 2741 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
2742 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
2743 goto e_inval;
1b83bef2 2744
fe5da05e
ID		 2745 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
2746 e_inval);
2747 for (i = 0; i < m->num_ops; i++) {
1b83bef2 2748 struct ceph_osd_op *op = p;
1b83bef2 2749
fe5da05e 2750 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 2751 p += sizeof(*op);
2752 }
1b83bef2 2753
fe5da05e
ID		 2754 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
2755 for (i = 0; i < m->num_ops; i++)
2756 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 2757
fe5da05e
ID		 2758 if (version >= 5) {
2759 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
2760 memcpy(&m->replay_version, p, sizeof(m->replay_version));
2761 p += sizeof(m->replay_version);
2762 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
2763 } else {
2764 m->replay_version = bad_replay_version; /* struct */
2765 m->user_version = le64_to_cpu(m->replay_version.version);
2766 }
eb845ff1 2767
fe5da05e
ID		 2768 if (version >= 6) {
2769 if (version >= 7)
2770 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 2771 else
2772 decode_redir = 1;
2773 } else {
2774 decode_redir = 0;
2775 }
2776
2777 if (decode_redir) {
fe5da05e
ID		 2778 ret = ceph_redirect_decode(&p, end, &m->redirect);
2779 if (ret)
2780 return ret;
205ee118 2781 } else {
fe5da05e 2782 ceph_oloc_init(&m->redirect.oloc);
205ee118 2783 }
f24e9980 2784
fe5da05e
ID		 2785 return 0;
2786
2787e_inval:
2788 return -EINVAL;
2789}
2790
2791/*
2792 * We are done with @req if
2793 * - @m is a safe reply, or
2794 * - @m is an unsafe reply and we didn't want a safe one
2795 */
2796static bool done_request(const struct ceph_osd_request *req,
2797 const struct MOSDOpReply *m)
2798{
2799 return (m->result < 0 ||
2800 (m->flags & CEPH_OSD_FLAG_ONDISK) ||
2801 !(req->r_flags & CEPH_OSD_FLAG_ONDISK));
2802}
205ee118 2803
fe5da05e
ID		 2804/*
2805 * handle osd op reply. either call the callback if it is specified,
2806 * or do the completion to wake up the waiting thread.
2807 *
2808 * ->r_unsafe_callback is set? yes no
2809 *
2810 * first reply is OK (needed r_cb/r_completion, r_cb/r_completion,
2811 * any or needed/got safe) r_safe_completion r_safe_completion
2812 *
2813 * first reply is unsafe r_unsafe_cb(true) (nothing)
2814 *
2815 * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion,
2816 * r_safe_completion r_safe_completion
2817 */
5aea3dcd 2818static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
fe5da05e 2819{
5aea3dcd 2820 struct ceph_osd_client *osdc = osd->o_osdc;
fe5da05e
ID		 2821 struct ceph_osd_request *req;
2822 struct MOSDOpReply m;
2823 u64 tid = le64_to_cpu(msg->hdr.tid);
2824 u32 data_len = 0;
2825 bool already_acked;
2826 int ret;
2827 int i;
2828
2829 dout("%s msg %p tid %llu\n", __func__, msg, tid);
2830
5aea3dcd
ID		 2831 down_read(&osdc->lock);
2832 if (!osd_registered(osd)) {
2833 dout("%s osd%d unknown\n", __func__, osd->o_osd);
2834 goto out_unlock_osdc;
2835 }
2836 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
2837
2838 mutex_lock(&osd->lock);
2839 req = lookup_request(&osd->o_requests, tid);
fe5da05e 2840 if (!req) {
5aea3dcd
ID		 2841 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
2842 goto out_unlock_session;
fe5da05e 2843 }
fe5da05e 2844
cd08e0a2 2845 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
fe5da05e 2846 ret = decode_MOSDOpReply(msg, &m);
cd08e0a2 2847 m.redirect.oloc.pool_ns = NULL;
fe5da05e
ID		 2848 if (ret) {
2849 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
2850 req->r_tid, ret);
2851 ceph_msg_dump(msg);
2852 goto fail_request;
2853 }
2854 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
2855 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
2856 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
2857 le64_to_cpu(m.replay_version.version), m.user_version);
2858
2859 if (m.retry_attempt >= 0) {
2860 if (m.retry_attempt != req->r_attempts - 1) {
2861 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
2862 req, req->r_tid, m.retry_attempt,
2863 req->r_attempts - 1);
5aea3dcd 2864 goto out_unlock_session;
fe5da05e
ID		 2865 }
2866 } else {
2867 WARN_ON(1); /* MOSDOpReply v4 is assumed */
2868 }
2869
2870 if (!ceph_oloc_empty(&m.redirect.oloc)) {
2871 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
2872 m.redirect.oloc.pool);
5aea3dcd
ID		 2873 unlink_request(osd, req);
2874 mutex_unlock(&osd->lock);
205ee118 2875
30c156d9
YZ		 2876 /*
2877 * Not ceph_oloc_copy() - changing pool_ns is not
2878 * supported.
2879 */
2880 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
5aea3dcd
ID		 2881 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
2882 req->r_tid = 0;
2883 __submit_request(req, false);
2884 goto out_unlock_osdc;
205ee118
ID		 2885 }
2886
fe5da05e
ID		 2887 if (m.num_ops != req->r_num_ops) {
2888 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
2889 req->r_num_ops, req->r_tid);
2890 goto fail_request;
f24e9980 2891 }
fe5da05e
ID		 2892 for (i = 0; i < req->r_num_ops; i++) {
2893 dout(" req %p tid %llu op %d rval %d len %u\n", req,
2894 req->r_tid, i, m.rval[i], m.outdata_len[i]);
2895 req->r_ops[i].rval = m.rval[i];
2896 req->r_ops[i].outdata_len = m.outdata_len[i];
2897 data_len += m.outdata_len[i];
2898 }
2899 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
2900 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
2901 le32_to_cpu(msg->hdr.data_len), req->r_tid);
2902 goto fail_request;
2903 }
2904 dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
2905 req, req->r_tid, req->r_got_reply, m.result, data_len);
2906
2907 already_acked = req->r_got_reply;
2908 if (!already_acked) {
2909 req->r_result = m.result ?: data_len;
2910 req->r_replay_version = m.replay_version; /* struct */
2911 req->r_got_reply = true;
2912 } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) {
2913 dout("req %p tid %llu dup ack\n", req, req->r_tid);
5aea3dcd 2914 goto out_unlock_session;
fe5da05e
ID		 2915 }
2916
2917 if (done_request(req, &m)) {
5aea3dcd 2918 __finish_request(req);
fe5da05e
ID		 2919 if (req->r_linger) {
2920 WARN_ON(req->r_unsafe_callback);
922dab61
ID		 2921 dout("req %p tid %llu cb (locked)\n", req, req->r_tid);
2922 __complete_request(req);
fe5da05e
ID		 2923 }
2924 }
f24e9980 2925
5aea3dcd
ID		 2926 mutex_unlock(&osd->lock);
2927 up_read(&osdc->lock);
f24e9980 2928
fe5da05e
ID		 2929 if (done_request(req, &m)) {
2930 if (already_acked && req->r_unsafe_callback) {
2931 dout("req %p tid %llu safe-cb\n", req, req->r_tid);
61c5d6bf 2932 req->r_unsafe_callback(req, false);
922dab61 2933 } else if (!req->r_linger) {
fe5da05e
ID		 2934 dout("req %p tid %llu cb\n", req, req->r_tid);
2935 __complete_request(req);
2936 }
dc045a91
ID		 2937 if (m.flags & CEPH_OSD_FLAG_ONDISK)
2938 complete_all(&req->r_safe_completion);
2939 ceph_osdc_put_request(req);
fe5da05e
ID		 2940 } else {
2941 if (req->r_unsafe_callback) {
2942 dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
2943 req->r_unsafe_callback(req, true);
2944 } else {
2945 WARN_ON(1);
2946 }
61c5d6bf 2947 }
f24e9980 2948
f24e9980
SW		 2949 return;
2950
fe5da05e 2951fail_request:
4609245e 2952 complete_request(req, -EIO);
5aea3dcd
ID		 2953out_unlock_session:
2954 mutex_unlock(&osd->lock);
2955out_unlock_osdc:
2956 up_read(&osdc->lock);
f24e9980
SW		 2957}
2958
42c1b124
ID		 2959static void set_pool_was_full(struct ceph_osd_client *osdc)
2960{
2961 struct rb_node *n;
2962
2963 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
2964 struct ceph_pg_pool_info *pi =
2965 rb_entry(n, struct ceph_pg_pool_info, node);
2966
2967 pi->was_full = __pool_full(pi);
2968 }
2969}
2970
5aea3dcd 2971static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
f24e9980 2972{
5aea3dcd 2973 struct ceph_pg_pool_info *pi;
f24e9980 2974
5aea3dcd
ID		 2975 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
2976 if (!pi)
2977 return false;
f24e9980 2978
5aea3dcd 2979 return pi->was_full && !__pool_full(pi);
422d2cb8
YS		 2980}
2981
922dab61
ID		 2982static enum calc_target_result
2983recalc_linger_target(struct ceph_osd_linger_request *lreq)
2984{
2985 struct ceph_osd_client *osdc = lreq->osdc;
2986 enum calc_target_result ct_res;
2987
2988 ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true);
2989 if (ct_res == CALC_TARGET_NEED_RESEND) {
2990 struct ceph_osd *osd;
2991
2992 osd = lookup_create_osd(osdc, lreq->t.osd, true);
2993 if (osd != lreq->osd) {
2994 unlink_linger(lreq->osd, lreq);
2995 link_linger(osd, lreq);
2996 }
2997 }
2998
2999 return ct_res;
3000}
3001
422d2cb8 3002/*
5aea3dcd 3003 * Requeue requests whose mapping to an OSD has changed.
422d2cb8 3004 */
5aea3dcd
ID		 3005static void scan_requests(struct ceph_osd *osd,
3006 bool force_resend,
3007 bool cleared_full,
3008 bool check_pool_cleared_full,
3009 struct rb_root *need_resend,
3010 struct list_head *need_resend_linger)
422d2cb8 3011{
5aea3dcd
ID		 3012 struct ceph_osd_client *osdc = osd->o_osdc;
3013 struct rb_node *n;
3014 bool force_resend_writes;
3015
922dab61
ID		 3016 for (n = rb_first(&osd->o_linger_requests); n; ) {
3017 struct ceph_osd_linger_request *lreq =
3018 rb_entry(n, struct ceph_osd_linger_request, node);
3019 enum calc_target_result ct_res;
3020
3021 n = rb_next(n); /* recalc_linger_target() */
3022
3023 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3024 lreq->linger_id);
3025 ct_res = recalc_linger_target(lreq);
3026 switch (ct_res) {
3027 case CALC_TARGET_NO_ACTION:
3028 force_resend_writes = cleared_full ||
3029 (check_pool_cleared_full &&
3030 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3031 if (!force_resend && !force_resend_writes)
3032 break;
3033
3034 /* fall through */
3035 case CALC_TARGET_NEED_RESEND:
4609245e 3036 cancel_linger_map_check(lreq);
922dab61
ID		 3037 /*
3038 * scan_requests() for the previous epoch(s)
3039 * may have already added it to the list, since
3040 * it's not unlinked here.
3041 */
3042 if (list_empty(&lreq->scan_item))
3043 list_add_tail(&lreq->scan_item, need_resend_linger);
3044 break;
3045 case CALC_TARGET_POOL_DNE:
4609245e 3046 check_linger_pool_dne(lreq);
922dab61
ID		 3047 break;
3048 }
3049 }
3050
5aea3dcd
ID		 3051 for (n = rb_first(&osd->o_requests); n; ) {
3052 struct ceph_osd_request *req =
3053 rb_entry(n, struct ceph_osd_request, r_node);
3054 enum calc_target_result ct_res;
3055
4609245e 3056 n = rb_next(n); /* unlink_request(), check_pool_dne() */
5aea3dcd
ID		 3057
3058 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3059 ct_res = calc_target(osdc, &req->r_t,
3060 &req->r_last_force_resend, false);
3061 switch (ct_res) {
3062 case CALC_TARGET_NO_ACTION:
3063 force_resend_writes = cleared_full ||
3064 (check_pool_cleared_full &&
3065 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3066 if (!force_resend &&
3067 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3068 !force_resend_writes))
3069 break;
3070
3071 /* fall through */
3072 case CALC_TARGET_NEED_RESEND:
4609245e 3073 cancel_map_check(req);
5aea3dcd
ID		 3074 unlink_request(osd, req);
3075 insert_request(need_resend, req);
3076 break;
3077 case CALC_TARGET_POOL_DNE:
4609245e 3078 check_pool_dne(req);
5aea3dcd 3079 break;
b0494532 3080 }
6f6c7006 3081 }
422d2cb8 3082}
6f6c7006 3083
42c1b124 3084static int handle_one_map(struct ceph_osd_client *osdc,
5aea3dcd
ID		 3085 void *p, void *end, bool incremental,
3086 struct rb_root *need_resend,
3087 struct list_head *need_resend_linger)
42c1b124
ID		 3088{
3089 struct ceph_osdmap *newmap;
3090 struct rb_node *n;
3091 bool skipped_map = false;
3092 bool was_full;
3093
b7ec35b3 3094 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
42c1b124
ID		 3095 set_pool_was_full(osdc);
3096
3097 if (incremental)
3098 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3099 else
3100 newmap = ceph_osdmap_decode(&p, end);
3101 if (IS_ERR(newmap))
3102 return PTR_ERR(newmap);
3103
3104 if (newmap != osdc->osdmap) {
3105 /*
3106 * Preserve ->was_full before destroying the old map.
3107 * For pools that weren't in the old map, ->was_full
3108 * should be false.
3109 */
3110 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3111 struct ceph_pg_pool_info *pi =
3112 rb_entry(n, struct ceph_pg_pool_info, node);
3113 struct ceph_pg_pool_info *old_pi;
3114
3115 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3116 if (old_pi)
3117 pi->was_full = old_pi->was_full;
3118 else
3119 WARN_ON(pi->was_full);
3120 }
3121
3122 if (osdc->osdmap->epoch &&
3123 osdc->osdmap->epoch + 1 < newmap->epoch) {
3124 WARN_ON(incremental);
3125 skipped_map = true;
3126 }
3127
3128 ceph_osdmap_destroy(osdc->osdmap);
3129 osdc->osdmap = newmap;
3130 }
3131
b7ec35b3 3132 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
5aea3dcd
ID		 3133 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3134 need_resend, need_resend_linger);
3135
3136 for (n = rb_first(&osdc->osds); n; ) {
3137 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3138
3139 n = rb_next(n); /* close_osd() */
3140
3141 scan_requests(osd, skipped_map, was_full, true, need_resend,
3142 need_resend_linger);
3143 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3144 memcmp(&osd->o_con.peer_addr,
3145 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3146 sizeof(struct ceph_entity_addr)))
3147 close_osd(osd);
3148 }
42c1b124
ID		 3149
3150 return 0;
3151}
6f6c7006 3152
5aea3dcd
ID		 3153static void kick_requests(struct ceph_osd_client *osdc,
3154 struct rb_root *need_resend,
3155 struct list_head *need_resend_linger)
3156{
922dab61 3157 struct ceph_osd_linger_request *lreq, *nlreq;
5aea3dcd
ID		 3158 struct rb_node *n;
3159
3160 for (n = rb_first(need_resend); n; ) {
3161 struct ceph_osd_request *req =
3162 rb_entry(n, struct ceph_osd_request, r_node);
3163 struct ceph_osd *osd;
3164
3165 n = rb_next(n);
3166 erase_request(need_resend, req); /* before link_request() */
3167
3168 WARN_ON(req->r_osd);
3169 calc_target(osdc, &req->r_t, NULL, false);
3170 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3171 link_request(osd, req);
3172 if (!req->r_linger) {
3173 if (!osd_homeless(osd) && !req->r_t.paused)
3174 send_request(req);
922dab61
ID		 3175 } else {
3176 cancel_linger_request(req);
5aea3dcd
ID		 3177 }
3178 }
922dab61
ID		 3179
3180 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3181 if (!osd_homeless(lreq->osd))
3182 send_linger(lreq);
3183
3184 list_del_init(&lreq->scan_item);
3185 }
5aea3dcd
ID		 3186}
3187
f24e9980
SW		 3188/*
3189 * Process updated osd map.
3190 *
3191 * The message contains any number of incremental and full maps, normally
3192 * indicating some sort of topology change in the cluster. Kick requests
3193 * off to different OSDs as needed.
3194 */
3195void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3196{
42c1b124
ID		 3197 void *p = msg->front.iov_base;
3198 void *const end = p + msg->front.iov_len;
f24e9980
SW		 3199 u32 nr_maps, maplen;
3200 u32 epoch;
f24e9980 3201 struct ceph_fsid fsid;
5aea3dcd
ID		 3202 struct rb_root need_resend = RB_ROOT;
3203 LIST_HEAD(need_resend_linger);
42c1b124
ID		 3204 bool handled_incremental = false;
3205 bool was_pauserd, was_pausewr;
3206 bool pauserd, pausewr;
3207 int err;
f24e9980 3208
42c1b124 3209 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
5aea3dcd 3210 down_write(&osdc->lock);
f24e9980
SW		 3211
3212 /* verify fsid */
3213 ceph_decode_need(&p, end, sizeof(fsid), bad);
3214 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 3215 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 3216 goto bad;
f24e9980 3217
b7ec35b3
ID		 3218 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3219 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3220 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124 3221 have_pool_full(osdc);
9a1ea2db 3222
f24e9980
SW		 3223 /* incremental maps */
3224 ceph_decode_32_safe(&p, end, nr_maps, bad);
3225 dout(" %d inc maps\n", nr_maps);
3226 while (nr_maps > 0) {
3227 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3228 epoch = ceph_decode_32(&p);
3229 maplen = ceph_decode_32(&p);
f24e9980 3230 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 3231 if (osdc->osdmap->epoch &&
3232 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 3233 dout("applying incremental map %u len %d\n",
3234 epoch, maplen);
5aea3dcd
ID		 3235 err = handle_one_map(osdc, p, p + maplen, true,
3236 &need_resend, &need_resend_linger);
42c1b124 3237 if (err)
f24e9980 3238 goto bad;
42c1b124 3239 handled_incremental = true;
f24e9980
SW		 3240 } else {
3241 dout("ignoring incremental map %u len %d\n",
3242 epoch, maplen);
3243 }
42c1b124 3244 p += maplen;
f24e9980
SW		 3245 nr_maps--;
3246 }
42c1b124 3247 if (handled_incremental)
f24e9980
SW		 3248 goto done;
3249
3250 /* full maps */
3251 ceph_decode_32_safe(&p, end, nr_maps, bad);
3252 dout(" %d full maps\n", nr_maps);
3253 while (nr_maps) {
3254 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 3255 epoch = ceph_decode_32(&p);
3256 maplen = ceph_decode_32(&p);
f24e9980
SW		 3257 ceph_decode_need(&p, end, maplen, bad);
3258 if (nr_maps > 1) {
3259 dout("skipping non-latest full map %u len %d\n",
3260 epoch, maplen);
e5253a7b 3261 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 3262 dout("skipping full map %u len %d, "
3263 "older than our %u\n", epoch, maplen,
3264 osdc->osdmap->epoch);
3265 } else {
3266 dout("taking full map %u len %d\n", epoch, maplen);
5aea3dcd
ID		 3267 err = handle_one_map(osdc, p, p + maplen, false,
3268 &need_resend, &need_resend_linger);
42c1b124 3269 if (err)
f24e9980 3270 goto bad;
f24e9980
SW		 3271 }
3272 p += maplen;
3273 nr_maps--;
3274 }
3275
3276done:
cd634fb6
SW		 3277 /*
3278 * subscribe to subsequent osdmap updates if full to ensure
3279 * we find out when we are no longer full and stop returning
3280 * ENOSPC.
3281 */
b7ec35b3
ID		 3282 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3283 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3284 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
42c1b124
ID		 3285 have_pool_full(osdc);
3286 if (was_pauserd || was_pausewr || pauserd || pausewr)
3287 maybe_request_map(osdc);
cd634fb6 3288
5aea3dcd 3289 kick_requests(osdc, &need_resend, &need_resend_linger);
42c1b124
ID		 3290
3291 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
3292 osdc->osdmap->epoch);
5aea3dcd 3293 up_write(&osdc->lock);
03066f23 3294 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 3295 return;
3296
3297bad:
3298 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 3299 ceph_msg_dump(msg);
5aea3dcd
ID		 3300 up_write(&osdc->lock);
3301}
3302
3303/*
3304 * Resubmit requests pending on the given osd.
3305 */
3306static void kick_osd_requests(struct ceph_osd *osd)
3307{
3308 struct rb_node *n;
3309
922dab61 3310 for (n = rb_first(&osd->o_requests); n; ) {
5aea3dcd
ID		 3311 struct ceph_osd_request *req =
3312 rb_entry(n, struct ceph_osd_request, r_node);
3313
922dab61
ID		 3314 n = rb_next(n); /* cancel_linger_request() */
3315
5aea3dcd
ID		 3316 if (!req->r_linger) {
3317 if (!req->r_t.paused)
3318 send_request(req);
922dab61
ID		 3319 } else {
3320 cancel_linger_request(req);
5aea3dcd
ID		 3321 }
3322 }
922dab61
ID		 3323 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
3324 struct ceph_osd_linger_request *lreq =
3325 rb_entry(n, struct ceph_osd_linger_request, node);
3326
3327 send_linger(lreq);
3328 }
5aea3dcd
ID		 3329}
3330
3331/*
3332 * If the osd connection drops, we need to resubmit all requests.
3333 */
3334static void osd_fault(struct ceph_connection *con)
3335{
3336 struct ceph_osd *osd = con->private;
3337 struct ceph_osd_client *osdc = osd->o_osdc;
3338
3339 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
3340
3341 down_write(&osdc->lock);
3342 if (!osd_registered(osd)) {
3343 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3344 goto out_unlock;
3345 }
3346
3347 if (!reopen_osd(osd))
3348 kick_osd_requests(osd);
3349 maybe_request_map(osdc);
3350
3351out_unlock:
3352 up_write(&osdc->lock);
f24e9980
SW		 3353}
3354
a40c4f10
YS		 3355/*
3356 * Process osd watch notifications
3357 */
3c663bbd
AE		 3358static void handle_watch_notify(struct ceph_osd_client *osdc,
3359 struct ceph_msg *msg)
a40c4f10 3360{
922dab61
ID		 3361 void *p = msg->front.iov_base;
3362 void *const end = p + msg->front.iov_len;
3363 struct ceph_osd_linger_request *lreq;
3364 struct linger_work *lwork;
3365 u8 proto_ver, opcode;
3366 u64 cookie, notify_id;
3367 u64 notifier_id = 0;
19079203 3368 s32 return_code = 0;
922dab61
ID		 3369 void *payload = NULL;
3370 u32 payload_len = 0;
a40c4f10
YS		 3371
3372 ceph_decode_8_safe(&p, end, proto_ver, bad);
3373 ceph_decode_8_safe(&p, end, opcode, bad);
3374 ceph_decode_64_safe(&p, end, cookie, bad);
922dab61 3375 p += 8; /* skip ver */
a40c4f10
YS		 3376 ceph_decode_64_safe(&p, end, notify_id, bad);
3377
922dab61
ID		 3378 if (proto_ver >= 1) {
3379 ceph_decode_32_safe(&p, end, payload_len, bad);
3380 ceph_decode_need(&p, end, payload_len, bad);
3381 payload = p;
3382 p += payload_len;
3383 }
3384
3385 if (le16_to_cpu(msg->hdr.version) >= 2)
19079203 3386 ceph_decode_32_safe(&p, end, return_code, bad);
922dab61
ID		 3387
3388 if (le16_to_cpu(msg->hdr.version) >= 3)
3389 ceph_decode_64_safe(&p, end, notifier_id, bad);
3390
3391 down_read(&osdc->lock);
3392 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
3393 if (!lreq) {
3394 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
3395 cookie);
3396 goto out_unlock_osdc;
3397 }
3398
3399 mutex_lock(&lreq->lock);
19079203
ID		 3400 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
3401 opcode, cookie, lreq, lreq->is_watch);
922dab61
ID		 3402 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
3403 if (!lreq->last_error) {
3404 lreq->last_error = -ENOTCONN;
3405 queue_watch_error(lreq);
3406 }
19079203
ID		 3407 } else if (!lreq->is_watch) {
3408 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
3409 if (lreq->notify_id && lreq->notify_id != notify_id) {
3410 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
3411 lreq->notify_id, notify_id);
3412 } else if (!completion_done(&lreq->notify_finish_wait)) {
3413 struct ceph_msg_data *data =
3414 list_first_entry_or_null(&msg->data,
3415 struct ceph_msg_data,
3416 links);
3417
3418 if (data) {
3419 if (lreq->preply_pages) {
3420 WARN_ON(data->type !=
3421 CEPH_MSG_DATA_PAGES);
3422 *lreq->preply_pages = data->pages;
3423 *lreq->preply_len = data->length;
3424 } else {
3425 ceph_release_page_vector(data->pages,
3426 calc_pages_for(0, data->length));
3427 }
3428 }
3429 lreq->notify_finish_error = return_code;
3430 complete_all(&lreq->notify_finish_wait);
3431 }
922dab61
ID		 3432 } else {
3433 /* CEPH_WATCH_EVENT_NOTIFY */
3434 lwork = lwork_alloc(lreq, do_watch_notify);
3435 if (!lwork) {
3436 pr_err("failed to allocate notify-lwork\n");
3437 goto out_unlock_lreq;
a40c4f10 3438 }
a40c4f10 3439
922dab61
ID		 3440 lwork->notify.notify_id = notify_id;
3441 lwork->notify.notifier_id = notifier_id;
3442 lwork->notify.payload = payload;
3443 lwork->notify.payload_len = payload_len;
3444 lwork->notify.msg = ceph_msg_get(msg);
3445 lwork_queue(lwork);
91883cd2 3446 }
a40c4f10 3447
922dab61
ID		 3448out_unlock_lreq:
3449 mutex_unlock(&lreq->lock);
3450out_unlock_osdc:
3451 up_read(&osdc->lock);
a40c4f10
YS		 3452 return;
3453
3454bad:
3455 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 3456}
3457
70636773
AE		 3458/*
3459 * Register request, send initial attempt.
3460 */
3461int ceph_osdc_start_request(struct ceph_osd_client *osdc,
3462 struct ceph_osd_request *req,
3463 bool nofail)
3464{
5aea3dcd
ID		 3465 down_read(&osdc->lock);
3466 submit_request(req, false);
3467 up_read(&osdc->lock);
0bbfdfe8 3468
5aea3dcd 3469 return 0;
f24e9980 3470}
3d14c5d2 3471EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 3472
c9f9b93d
ID		 3473/*
3474 * Unregister a registered request. The request is not completed (i.e.
3475 * no callbacks or wakeups) - higher layers are supposed to know what
3476 * they are canceling.
3477 */
3478void ceph_osdc_cancel_request(struct ceph_osd_request *req)
3479{
3480 struct ceph_osd_client *osdc = req->r_osdc;
3481
5aea3dcd 3482 down_write(&osdc->lock);
5aea3dcd
ID		 3483 if (req->r_osd)
3484 cancel_request(req);
3485 up_write(&osdc->lock);
c9f9b93d
ID		 3486}
3487EXPORT_SYMBOL(ceph_osdc_cancel_request);
3488
f24e9980 3489/*
42b06965 3490 * @timeout: in jiffies, 0 means "wait forever"
f24e9980 3491 */
42b06965
ID		 3492static int wait_request_timeout(struct ceph_osd_request *req,
3493 unsigned long timeout)
f24e9980 3494{
42b06965 3495 long left;
c9f9b93d 3496
42b06965 3497 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
0e76abf2 3498 left = wait_for_completion_killable_timeout(&req->r_completion,
42b06965
ID		 3499 ceph_timeout_jiffies(timeout));
3500 if (left <= 0) {
3501 left = left ?: -ETIMEDOUT;
c9f9b93d 3502 ceph_osdc_cancel_request(req);
fe5da05e
ID		 3503
3504 /* kludge - need to to wake ceph_osdc_sync() */
3505 complete_all(&req->r_safe_completion);
42b06965
ID		 3506 } else {
3507 left = req->r_result; /* completed */
f24e9980
SW		 3508 }
3509
42b06965
ID		 3510 return left;
3511}
3512
3513/*
3514 * wait for a request to complete
3515 */
3516int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
3517 struct ceph_osd_request *req)
3518{
3519 return wait_request_timeout(req, 0);
f24e9980 3520}
3d14c5d2 3521EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 3522
3523/*
3524 * sync - wait for all in-flight requests to flush. avoid starvation.
3525 */
3526void ceph_osdc_sync(struct ceph_osd_client *osdc)
3527{
5aea3dcd
ID		 3528 struct rb_node *n, *p;
3529 u64 last_tid = atomic64_read(&osdc->last_tid);
f24e9980 3530
5aea3dcd
ID		 3531again:
3532 down_read(&osdc->lock);
3533 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3534 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3535
3536 mutex_lock(&osd->lock);
3537 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
3538 struct ceph_osd_request *req =
3539 rb_entry(p, struct ceph_osd_request, r_node);
3540
3541 if (req->r_tid > last_tid)
3542 break;
3543
3544 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
3545 continue;
f24e9980 3546
5aea3dcd
ID		 3547 ceph_osdc_get_request(req);
3548 mutex_unlock(&osd->lock);
3549 up_read(&osdc->lock);
3550 dout("%s waiting on req %p tid %llu last_tid %llu\n",
3551 __func__, req, req->r_tid, last_tid);
3552 wait_for_completion(&req->r_safe_completion);
3553 ceph_osdc_put_request(req);
3554 goto again;
3555 }
f24e9980 3556
5aea3dcd 3557 mutex_unlock(&osd->lock);
f24e9980 3558 }
5aea3dcd
ID		 3559
3560 up_read(&osdc->lock);
3561 dout("%s done last_tid %llu\n", __func__, last_tid);
f24e9980 3562}
3d14c5d2 3563EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 3564
922dab61
ID		 3565static struct ceph_osd_request *
3566alloc_linger_request(struct ceph_osd_linger_request *lreq)
3567{
3568 struct ceph_osd_request *req;
3569
3570 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
3571 if (!req)
3572 return NULL;
3573
3574 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3575 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3576
3577 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
3578 ceph_osdc_put_request(req);
3579 return NULL;
3580 }
3581
3582 return req;
3583}
3584
3585/*
3586 * Returns a handle, caller owns a ref.
3587 */
3588struct ceph_osd_linger_request *
3589ceph_osdc_watch(struct ceph_osd_client *osdc,
3590 struct ceph_object_id *oid,
3591 struct ceph_object_locator *oloc,
3592 rados_watchcb2_t wcb,
3593 rados_watcherrcb_t errcb,
3594 void *data)
3595{
3596 struct ceph_osd_linger_request *lreq;
3597 int ret;
3598
3599 lreq = linger_alloc(osdc);
3600 if (!lreq)
3601 return ERR_PTR(-ENOMEM);
3602
19079203 3603 lreq->is_watch = true;
922dab61
ID		 3604 lreq->wcb = wcb;
3605 lreq->errcb = errcb;
3606 lreq->data = data;
b07d3c4b 3607 lreq->watch_valid_thru = jiffies;
922dab61
ID		 3608
3609 ceph_oid_copy(&lreq->t.base_oid, oid);
3610 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
3611 lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
3612 lreq->mtime = CURRENT_TIME;
3613
3614 lreq->reg_req = alloc_linger_request(lreq);
3615 if (!lreq->reg_req) {
3616 ret = -ENOMEM;
3617 goto err_put_lreq;
3618 }
3619
3620 lreq->ping_req = alloc_linger_request(lreq);
3621 if (!lreq->ping_req) {
3622 ret = -ENOMEM;
3623 goto err_put_lreq;
3624 }
3625
3626 down_write(&osdc->lock);
3627 linger_register(lreq); /* before osd_req_op_* */
3628 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
3629 CEPH_OSD_WATCH_OP_WATCH);
3630 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
3631 CEPH_OSD_WATCH_OP_PING);
3632 linger_submit(lreq);
3633 up_write(&osdc->lock);
3634
3635 ret = linger_reg_commit_wait(lreq);
3636 if (ret) {
3637 linger_cancel(lreq);
3638 goto err_put_lreq;
3639 }
3640
3641 return lreq;
3642
3643err_put_lreq:
3644 linger_put(lreq);
3645 return ERR_PTR(ret);
3646}
3647EXPORT_SYMBOL(ceph_osdc_watch);
3648
3649/*
3650 * Releases a ref.
3651 *
3652 * Times out after mount_timeout to preserve rbd unmap behaviour
3653 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
3654 * with mount_timeout").
3655 */
3656int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
3657 struct ceph_osd_linger_request *lreq)
3658{
3659 struct ceph_options *opts = osdc->client->options;
3660 struct ceph_osd_request *req;
3661 int ret;
3662
3663 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3664 if (!req)
3665 return -ENOMEM;
3666
3667 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3668 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3669 req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
3670 req->r_mtime = CURRENT_TIME;
3671 osd_req_op_watch_init(req, 0, lreq->linger_id,
3672 CEPH_OSD_WATCH_OP_UNWATCH);
3673
3674 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3675 if (ret)
3676 goto out_put_req;
3677
3678 ceph_osdc_start_request(osdc, req, false);
3679 linger_cancel(lreq);
3680 linger_put(lreq);
3681 ret = wait_request_timeout(req, opts->mount_timeout);
3682
3683out_put_req:
3684 ceph_osdc_put_request(req);
3685 return ret;
3686}
3687EXPORT_SYMBOL(ceph_osdc_unwatch);
3688
3689static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
3690 u64 notify_id, u64 cookie, void *payload,
3691 size_t payload_len)
3692{
3693 struct ceph_osd_req_op *op;
3694 struct ceph_pagelist *pl;
3695 int ret;
3696
3697 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
3698
3699 pl = kmalloc(sizeof(*pl), GFP_NOIO);
3700 if (!pl)
3701 return -ENOMEM;
3702
3703 ceph_pagelist_init(pl);
3704 ret = ceph_pagelist_encode_64(pl, notify_id);
3705 ret |= ceph_pagelist_encode_64(pl, cookie);
3706 if (payload) {
3707 ret |= ceph_pagelist_encode_32(pl, payload_len);
3708 ret |= ceph_pagelist_append(pl, payload, payload_len);
3709 } else {
3710 ret |= ceph_pagelist_encode_32(pl, 0);
3711 }
3712 if (ret) {
3713 ceph_pagelist_release(pl);
3714 return -ENOMEM;
3715 }
3716
3717 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
3718 op->indata_len = pl->length;
3719 return 0;
3720}
3721
3722int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
3723 struct ceph_object_id *oid,
3724 struct ceph_object_locator *oloc,
3725 u64 notify_id,
3726 u64 cookie,
3727 void *payload,
3728 size_t payload_len)
3729{
3730 struct ceph_osd_request *req;
3731 int ret;
3732
3733 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3734 if (!req)
3735 return -ENOMEM;
3736
3737 ceph_oid_copy(&req->r_base_oid, oid);
3738 ceph_oloc_copy(&req->r_base_oloc, oloc);
3739 req->r_flags = CEPH_OSD_FLAG_READ;
3740
3741 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3742 if (ret)
3743 goto out_put_req;
3744
3745 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
3746 payload_len);
3747 if (ret)
3748 goto out_put_req;
3749
3750 ceph_osdc_start_request(osdc, req, false);
3751 ret = ceph_osdc_wait_request(osdc, req);
3752
3753out_put_req:
3754 ceph_osdc_put_request(req);
3755 return ret;
3756}
3757EXPORT_SYMBOL(ceph_osdc_notify_ack);
3758
19079203
ID		 3759static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
3760 u64 cookie, u32 prot_ver, u32 timeout,
3761 void *payload, size_t payload_len)
3762{
3763 struct ceph_osd_req_op *op;
3764 struct ceph_pagelist *pl;
3765 int ret;
3766
3767 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
3768 op->notify.cookie = cookie;
3769
3770 pl = kmalloc(sizeof(*pl), GFP_NOIO);
3771 if (!pl)
3772 return -ENOMEM;
3773
3774 ceph_pagelist_init(pl);
3775 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
3776 ret |= ceph_pagelist_encode_32(pl, timeout);
3777 ret |= ceph_pagelist_encode_32(pl, payload_len);
3778 ret |= ceph_pagelist_append(pl, payload, payload_len);
3779 if (ret) {
3780 ceph_pagelist_release(pl);
3781 return -ENOMEM;
3782 }
3783
3784 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
3785 op->indata_len = pl->length;
3786 return 0;
3787}
3788
3789/*
3790 * @timeout: in seconds
3791 *
3792 * @preply_{pages,len} are initialized both on success and error.
3793 * The caller is responsible for:
3794 *
3795 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
3796 */
3797int ceph_osdc_notify(struct ceph_osd_client *osdc,
3798 struct ceph_object_id *oid,
3799 struct ceph_object_locator *oloc,
3800 void *payload,
3801 size_t payload_len,
3802 u32 timeout,
3803 struct page ***preply_pages,
3804 size_t *preply_len)
3805{
3806 struct ceph_osd_linger_request *lreq;
3807 struct page **pages;
3808 int ret;
3809
3810 WARN_ON(!timeout);
3811 if (preply_pages) {
3812 *preply_pages = NULL;
3813 *preply_len = 0;
3814 }
3815
3816 lreq = linger_alloc(osdc);
3817 if (!lreq)
3818 return -ENOMEM;
3819
3820 lreq->preply_pages = preply_pages;
3821 lreq->preply_len = preply_len;
3822
3823 ceph_oid_copy(&lreq->t.base_oid, oid);
3824 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
3825 lreq->t.flags = CEPH_OSD_FLAG_READ;
3826
3827 lreq->reg_req = alloc_linger_request(lreq);
3828 if (!lreq->reg_req) {
3829 ret = -ENOMEM;
3830 goto out_put_lreq;
3831 }
3832
3833 /* for notify_id */
3834 pages = ceph_alloc_page_vector(1, GFP_NOIO);
3835 if (IS_ERR(pages)) {
3836 ret = PTR_ERR(pages);
3837 goto out_put_lreq;
3838 }
3839
3840 down_write(&osdc->lock);
3841 linger_register(lreq); /* before osd_req_op_* */
3842 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
3843 timeout, payload, payload_len);
3844 if (ret) {
3845 linger_unregister(lreq);
3846 up_write(&osdc->lock);
3847 ceph_release_page_vector(pages, 1);
3848 goto out_put_lreq;
3849 }
3850 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
3851 response_data),
3852 pages, PAGE_SIZE, 0, false, true);
3853 linger_submit(lreq);
3854 up_write(&osdc->lock);
3855
3856 ret = linger_reg_commit_wait(lreq);
3857 if (!ret)
3858 ret = linger_notify_finish_wait(lreq);
3859 else
3860 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
3861
3862 linger_cancel(lreq);
3863out_put_lreq:
3864 linger_put(lreq);
3865 return ret;
3866}
3867EXPORT_SYMBOL(ceph_osdc_notify);
3868
b07d3c4b
ID		 3869/*
3870 * Return the number of milliseconds since the watch was last
3871 * confirmed, or an error. If there is an error, the watch is no
3872 * longer valid, and should be destroyed with ceph_osdc_unwatch().
3873 */
3874int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
3875 struct ceph_osd_linger_request *lreq)
3876{
3877 unsigned long stamp, age;
3878 int ret;
3879
3880 down_read(&osdc->lock);
3881 mutex_lock(&lreq->lock);
3882 stamp = lreq->watch_valid_thru;
3883 if (!list_empty(&lreq->pending_lworks)) {
3884 struct linger_work *lwork =
3885 list_first_entry(&lreq->pending_lworks,
3886 struct linger_work,
3887 pending_item);
3888
3889 if (time_before(lwork->queued_stamp, stamp))
3890 stamp = lwork->queued_stamp;
3891 }
3892 age = jiffies - stamp;
3893 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
3894 lreq, lreq->linger_id, age, lreq->last_error);
3895 /* we are truncating to msecs, so return a safe upper bound */
3896 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
3897
3898 mutex_unlock(&lreq->lock);
3899 up_read(&osdc->lock);
3900 return ret;
3901}
3902
a4ed38d7
DF		 3903static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
3904{
3905 u8 struct_v;
3906 u32 struct_len;
3907 int ret;
3908
3909 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
3910 &struct_v, &struct_len);
3911 if (ret)
3912 return ret;
3913
3914 ceph_decode_copy(p, &item->name, sizeof(item->name));
3915 item->cookie = ceph_decode_64(p);
3916 *p += 4; /* skip timeout_seconds */
3917 if (struct_v >= 2) {
3918 ceph_decode_copy(p, &item->addr, sizeof(item->addr));
3919 ceph_decode_addr(&item->addr);
3920 }
3921
3922 dout("%s %s%llu cookie %llu addr %s\n", __func__,
3923 ENTITY_NAME(item->name), item->cookie,
3924 ceph_pr_addr(&item->addr.in_addr));
3925 return 0;
3926}
3927
3928static int decode_watchers(void **p, void *end,
3929 struct ceph_watch_item **watchers,
3930 u32 *num_watchers)
3931{
3932 u8 struct_v;
3933 u32 struct_len;
3934 int i;
3935 int ret;
3936
3937 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
3938 &struct_v, &struct_len);
3939 if (ret)
3940 return ret;
3941
3942 *num_watchers = ceph_decode_32(p);
3943 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
3944 if (!*watchers)
3945 return -ENOMEM;
3946
3947 for (i = 0; i < *num_watchers; i++) {
3948 ret = decode_watcher(p, end, *watchers + i);
3949 if (ret) {
3950 kfree(*watchers);
3951 return ret;
3952 }
3953 }
3954
3955 return 0;
3956}
3957
3958/*
3959 * On success, the caller is responsible for:
3960 *
3961 * kfree(watchers);
3962 */
3963int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
3964 struct ceph_object_id *oid,
3965 struct ceph_object_locator *oloc,
3966 struct ceph_watch_item **watchers,
3967 u32 *num_watchers)
3968{
3969 struct ceph_osd_request *req;
3970 struct page **pages;
3971 int ret;
3972
3973 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3974 if (!req)
3975 return -ENOMEM;
3976
3977 ceph_oid_copy(&req->r_base_oid, oid);
3978 ceph_oloc_copy(&req->r_base_oloc, oloc);
3979 req->r_flags = CEPH_OSD_FLAG_READ;
3980
3981 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3982 if (ret)
3983 goto out_put_req;
3984
3985 pages = ceph_alloc_page_vector(1, GFP_NOIO);
3986 if (IS_ERR(pages)) {
3987 ret = PTR_ERR(pages);
3988 goto out_put_req;
3989 }
3990
3991 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
3992 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
3993 response_data),
3994 pages, PAGE_SIZE, 0, false, true);
3995
3996 ceph_osdc_start_request(osdc, req, false);
3997 ret = ceph_osdc_wait_request(osdc, req);
3998 if (ret >= 0) {
3999 void *p = page_address(pages[0]);
4000 void *const end = p + req->r_ops[0].outdata_len;
4001
4002 ret = decode_watchers(&p, end, watchers, num_watchers);
4003 }
4004
4005out_put_req:
4006 ceph_osdc_put_request(req);
4007 return ret;
4008}
4009EXPORT_SYMBOL(ceph_osdc_list_watchers);
4010
dd935f44
JD		 4011/*
4012 * Call all pending notify callbacks - for use after a watch is
4013 * unregistered, to make sure no more callbacks for it will be invoked
4014 */
f6479449 4015void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44 4016{
99d16943 4017 dout("%s osdc %p\n", __func__, osdc);
dd935f44
JD		 4018 flush_workqueue(osdc->notify_wq);
4019}
4020EXPORT_SYMBOL(ceph_osdc_flush_notifies);
4021
7cca78c9
ID		 4022void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
4023{
4024 down_read(&osdc->lock);
4025 maybe_request_map(osdc);
4026 up_read(&osdc->lock);
4027}
4028EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
dd935f44 4029
428a7158
DF		 4030/*
4031 * Execute an OSD class method on an object.
4032 *
4033 * @flags: CEPH_OSD_FLAG_*
4034 * @resp_len: out param for reply length
4035 */
4036int ceph_osdc_call(struct ceph_osd_client *osdc,
4037 struct ceph_object_id *oid,
4038 struct ceph_object_locator *oloc,
4039 const char *class, const char *method,
4040 unsigned int flags,
4041 struct page *req_page, size_t req_len,
4042 struct page *resp_page, size_t *resp_len)
4043{
4044 struct ceph_osd_request *req;
4045 int ret;
4046
4047 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4048 if (!req)
4049 return -ENOMEM;
4050
4051 ceph_oid_copy(&req->r_base_oid, oid);
4052 ceph_oloc_copy(&req->r_base_oloc, oloc);
4053 req->r_flags = flags;
4054
4055 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4056 if (ret)
4057 goto out_put_req;
4058
4059 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
4060 if (req_page)
4061 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
4062 0, false, false);
4063 if (resp_page)
4064 osd_req_op_cls_response_data_pages(req, 0, &resp_page,
4065 PAGE_SIZE, 0, false, false);
4066
4067 ceph_osdc_start_request(osdc, req, false);
4068 ret = ceph_osdc_wait_request(osdc, req);
4069 if (ret >= 0) {
4070 ret = req->r_ops[0].rval;
4071 if (resp_page)
4072 *resp_len = req->r_ops[0].outdata_len;
4073 }
4074
4075out_put_req:
4076 ceph_osdc_put_request(req);
4077 return ret;
4078}
4079EXPORT_SYMBOL(ceph_osdc_call);
4080
f24e9980
SW		 4081/*
4082 * init, shutdown
4083 */
4084int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
4085{
4086 int err;
4087
4088 dout("init\n");
4089 osdc->client = client;
5aea3dcd 4090 init_rwsem(&osdc->lock);
f24e9980 4091 osdc->osds = RB_ROOT;
f5a2041b 4092 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 4093 spin_lock_init(&osdc->osd_lru_lock);
5aea3dcd
ID		 4094 osd_init(&osdc->homeless_osd);
4095 osdc->homeless_osd.o_osdc = osdc;
4096 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
264048af 4097 osdc->last_linger_id = CEPH_LINGER_ID_START;
922dab61 4098 osdc->linger_requests = RB_ROOT;
4609245e
ID		 4099 osdc->map_checks = RB_ROOT;
4100 osdc->linger_map_checks = RB_ROOT;
f24e9980 4101 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b
YS		 4102 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
4103
5f44f142 4104 err = -ENOMEM;
e5253a7b
ID		 4105 osdc->osdmap = ceph_osdmap_alloc();
4106 if (!osdc->osdmap)
4107 goto out;
4108
9e767adb
ID		 4109 osdc->req_mempool = mempool_create_slab_pool(10,
4110 ceph_osd_request_cache);
f24e9980 4111 if (!osdc->req_mempool)
e5253a7b 4112 goto out_map;
f24e9980 4113
d50b409f 4114 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
711da55d 4115 PAGE_SIZE, 10, true, "osd_op");
f24e9980 4116 if (err < 0)
5f44f142 4117 goto out_mempool;
d50b409f 4118 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
711da55d 4119 PAGE_SIZE, 10, true, "osd_op_reply");
c16e7869
SW		 4120 if (err < 0)
4121 goto out_msgpool;
a40c4f10 4122
dbcae088 4123 err = -ENOMEM;
a40c4f10 4124 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 4125 if (!osdc->notify_wq)
c172ec5c
ID		 4126 goto out_msgpool_reply;
4127
fbca9635
ID		 4128 schedule_delayed_work(&osdc->timeout_work,
4129 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 4130 schedule_delayed_work(&osdc->osds_timeout_work,
4131 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
4132
f24e9980 4133 return 0;
5f44f142 4134
c172ec5c
ID		 4135out_msgpool_reply:
4136 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 4137out_msgpool:
4138 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 4139out_mempool:
4140 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 4141out_map:
4142 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 4143out:
4144 return err;
f24e9980
SW		 4145}
4146
4147void ceph_osdc_stop(struct ceph_osd_client *osdc)
4148{
a40c4f10
YS		 4149 flush_workqueue(osdc->notify_wq);
4150 destroy_workqueue(osdc->notify_wq);
f24e9980 4151 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 4152 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f 4153
5aea3dcd 4154 down_write(&osdc->lock);
42a2c09f
ID		 4155 while (!RB_EMPTY_ROOT(&osdc->osds)) {
4156 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
4157 struct ceph_osd, o_node);
5aea3dcd 4158 close_osd(osd);
42a2c09f 4159 }
5aea3dcd
ID		 4160 up_write(&osdc->lock);
4161 WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1);
4162 osd_cleanup(&osdc->homeless_osd);
4163
4164 WARN_ON(!list_empty(&osdc->osd_lru));
922dab61 4165 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4609245e
ID		 4166 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
4167 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5aea3dcd
ID		 4168 WARN_ON(atomic_read(&osdc->num_requests));
4169 WARN_ON(atomic_read(&osdc->num_homeless));
42a2c09f 4170
e5253a7b 4171 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 4172 mempool_destroy(osdc->req_mempool);
4173 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 4174 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 4175}
4176
4177/*
4178 * Read some contiguous pages. If we cross a stripe boundary, shorten
4179 * *plen. Return number of bytes read, or error.
4180 */
4181int ceph_osdc_readpages(struct ceph_osd_client *osdc,
4182 struct ceph_vino vino, struct ceph_file_layout *layout,
4183 u64 off, u64 *plen,
4184 u32 truncate_seq, u64 truncate_size,
b7495fc2 4185 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 4186{
4187 struct ceph_osd_request *req;
4188 int rc = 0;
4189
4190 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
4191 vino.snap, off, *plen);
715e4cd4 4192 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 4193 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 4194 NULL, truncate_seq, truncate_size,
153e5167 4195 false);
6816282d
SW		 4196 if (IS_ERR(req))
4197 return PTR_ERR(req);
f24e9980
SW		 4198
4199 /* it may be a short read due to an object boundary */
406e2c9f 4200 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 4201 pages, *plen, page_align, false, false);
f24e9980 4202
e0c59487 4203 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 4204 off, *plen, *plen, page_align);
f24e9980
SW		 4205
4206 rc = ceph_osdc_start_request(osdc, req, false);
4207 if (!rc)
4208 rc = ceph_osdc_wait_request(osdc, req);
4209
4210 ceph_osdc_put_request(req);
4211 dout("readpages result %d\n", rc);
4212 return rc;
4213}
3d14c5d2 4214EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 4215
4216/*
4217 * do a synchronous write on N pages
4218 */
4219int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
4220 struct ceph_file_layout *layout,
4221 struct ceph_snap_context *snapc,
4222 u64 off, u64 len,
4223 u32 truncate_seq, u64 truncate_size,
4224 struct timespec *mtime,
24808826 4225 struct page **pages, int num_pages)
f24e9980
SW		 4226{
4227 struct ceph_osd_request *req;
4228 int rc = 0;
b7495fc2 4229 int page_align = off & ~PAGE_MASK;
f24e9980 4230
715e4cd4 4231 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
f24e9980 4232 CEPH_OSD_OP_WRITE,
24808826 4233 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 4234 snapc, truncate_seq, truncate_size,
153e5167 4235 true);
6816282d
SW		 4236 if (IS_ERR(req))
4237 return PTR_ERR(req);
f24e9980
SW		 4238
4239 /* it may be a short write due to an object boundary */
406e2c9f 4240 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 4241 false, false);
4242 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 4243
bb873b53 4244 req->r_mtime = *mtime;
87f979d3 4245 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 4246 if (!rc)
4247 rc = ceph_osdc_wait_request(osdc, req);
4248
4249 ceph_osdc_put_request(req);
4250 if (rc == 0)
4251 rc = len;
4252 dout("writepages result %d\n", rc);
4253 return rc;
4254}
3d14c5d2 4255EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 4256
5522ae0b
AE		 4257int ceph_osdc_setup(void)
4258{
3f1af42a
ID		 4259 size_t size = sizeof(struct ceph_osd_request) +
4260 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
4261
5522ae0b 4262 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 4263 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
4264 0, 0, NULL);
5522ae0b
AE		 4265
4266 return ceph_osd_request_cache ? 0 : -ENOMEM;
4267}
4268EXPORT_SYMBOL(ceph_osdc_setup);
4269
4270void ceph_osdc_cleanup(void)
4271{
4272 BUG_ON(!ceph_osd_request_cache);
4273 kmem_cache_destroy(ceph_osd_request_cache);
4274 ceph_osd_request_cache = NULL;
4275}
4276EXPORT_SYMBOL(ceph_osdc_cleanup);
4277
f24e9980
SW		 4278/*
4279 * handle incoming message
4280 */
4281static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
4282{
4283 struct ceph_osd *osd = con->private;
5aea3dcd 4284 struct ceph_osd_client *osdc = osd->o_osdc;
f24e9980
SW		 4285 int type = le16_to_cpu(msg->hdr.type);
4286
f24e9980
SW		 4287 switch (type) {
4288 case CEPH_MSG_OSD_MAP:
4289 ceph_osdc_handle_map(osdc, msg);
4290 break;
4291 case CEPH_MSG_OSD_OPREPLY:
5aea3dcd 4292 handle_reply(osd, msg);
f24e9980 4293 break;
a40c4f10
YS		 4294 case CEPH_MSG_WATCH_NOTIFY:
4295 handle_watch_notify(osdc, msg);
4296 break;
f24e9980
SW		 4297
4298 default:
4299 pr_err("received unknown message type %d %s\n", type,
4300 ceph_msg_type_name(type));
4301 }
5aea3dcd 4302
f24e9980
SW		 4303 ceph_msg_put(msg);
4304}
4305
5b3a4db3 4306/*
d15f9d69
ID		 4307 * Lookup and return message for incoming reply. Don't try to do
4308 * anything about a larger than preallocated data portion of the
4309 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 4310 */
4311static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 4312 struct ceph_msg_header *hdr,
4313 int *skip)
f24e9980
SW		 4314{
4315 struct ceph_osd *osd = con->private;
4316 struct ceph_osd_client *osdc = osd->o_osdc;
5aea3dcd 4317 struct ceph_msg *m = NULL;
0547a9b3 4318 struct ceph_osd_request *req;
3f0a4ac5 4319 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 4320 int data_len = le32_to_cpu(hdr->data_len);
5aea3dcd 4321 u64 tid = le64_to_cpu(hdr->tid);
f24e9980 4322
5aea3dcd
ID		 4323 down_read(&osdc->lock);
4324 if (!osd_registered(osd)) {
4325 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
4326 *skip = 1;
4327 goto out_unlock_osdc;
4328 }
4329 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
4330
4331 mutex_lock(&osd->lock);
4332 req = lookup_request(&osd->o_requests, tid);
0547a9b3 4333 if (!req) {
cd8140c6
ID		 4334 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
4335 osd->o_osd, tid);
d15f9d69 4336 *skip = 1;
5aea3dcd 4337 goto out_unlock_session;
0547a9b3 4338 }
c16e7869 4339
ace6d3a9 4340 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 4341
f2be82b0 4342 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 4343 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
4344 __func__, osd->o_osd, req->r_tid, front_len,
4345 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 4346 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
4347 false);
a79832f2 4348 if (!m)
5aea3dcd 4349 goto out_unlock_session;
c16e7869
SW		 4350 ceph_msg_put(req->r_reply);
4351 req->r_reply = m;
4352 }
0fff87ec 4353
d15f9d69
ID		 4354 if (data_len > req->r_reply->data_length) {
4355 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
4356 __func__, osd->o_osd, req->r_tid, data_len,
4357 req->r_reply->data_length);
4358 m = NULL;
4359 *skip = 1;
5aea3dcd 4360 goto out_unlock_session;
0547a9b3 4361 }
d15f9d69
ID		 4362
4363 m = ceph_msg_get(req->r_reply);
c16e7869 4364 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3 4365
5aea3dcd
ID		 4366out_unlock_session:
4367 mutex_unlock(&osd->lock);
4368out_unlock_osdc:
4369 up_read(&osdc->lock);
2450418c 4370 return m;
5b3a4db3
SW		 4371}
4372
19079203
ID		 4373/*
4374 * TODO: switch to a msg-owned pagelist
4375 */
4376static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
4377{
4378 struct ceph_msg *m;
4379 int type = le16_to_cpu(hdr->type);
4380 u32 front_len = le32_to_cpu(hdr->front_len);
4381 u32 data_len = le32_to_cpu(hdr->data_len);
4382
4383 m = ceph_msg_new(type, front_len, GFP_NOIO, false);
4384 if (!m)
4385 return NULL;
4386
4387 if (data_len) {
4388 struct page **pages;
4389 struct ceph_osd_data osd_data;
4390
4391 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
4392 GFP_NOIO);
c22e853a 4393 if (IS_ERR(pages)) {
19079203
ID		 4394 ceph_msg_put(m);
4395 return NULL;
4396 }
4397
4398 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
4399 false);
4400 ceph_osdc_msg_data_add(m, &osd_data);
4401 }
4402
4403 return m;
4404}
4405
5b3a4db3
SW		 4406static struct ceph_msg *alloc_msg(struct ceph_connection *con,
4407 struct ceph_msg_header *hdr,
4408 int *skip)
4409{
4410 struct ceph_osd *osd = con->private;
4411 int type = le16_to_cpu(hdr->type);
5b3a4db3 4412
1c20f2d2 4413 *skip = 0;
5b3a4db3
SW		 4414 switch (type) {
4415 case CEPH_MSG_OSD_MAP:
a40c4f10 4416 case CEPH_MSG_WATCH_NOTIFY:
19079203 4417 return alloc_msg_with_page_vector(hdr);
5b3a4db3
SW		 4418 case CEPH_MSG_OSD_OPREPLY:
4419 return get_reply(con, hdr, skip);
4420 default:
5aea3dcd
ID		 4421 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
4422 osd->o_osd, type);
5b3a4db3
SW		 4423 *skip = 1;
4424 return NULL;
4425 }
f24e9980
SW		 4426}
4427
4428/*
4429 * Wrappers to refcount containing ceph_osd struct
4430 */
4431static struct ceph_connection *get_osd_con(struct ceph_connection *con)
4432{
4433 struct ceph_osd *osd = con->private;
4434 if (get_osd(osd))
4435 return con;
4436 return NULL;
4437}
4438
4439static void put_osd_con(struct ceph_connection *con)
4440{
4441 struct ceph_osd *osd = con->private;
4442 put_osd(osd);
4443}
4444
4e7a5dcd
SW		 4445/*
4446 * authentication
4447 */
a3530df3
AE		 4448/*
4449 * Note: returned pointer is the address of a structure that's
4450 * managed separately. Caller must *not* attempt to free it.
4451 */
4452static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 4453 int *proto, int force_new)
4e7a5dcd
SW		 4454{
4455 struct ceph_osd *o = con->private;
4456 struct ceph_osd_client *osdc = o->o_osdc;
4457 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 4458 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 4459
74f1869f 4460 if (force_new && auth->authorizer) {
6c1ea260 4461 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 4462 auth->authorizer = NULL;
4463 }
27859f97
SW		 4464 if (!auth->authorizer) {
4465 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
4466 auth);
4e7a5dcd 4467 if (ret)
a3530df3 4468 return ERR_PTR(ret);
27859f97
SW		 4469 } else {
4470 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 4471 auth);
4472 if (ret)
4473 return ERR_PTR(ret);
4e7a5dcd 4474 }
4e7a5dcd 4475 *proto = ac->protocol;
74f1869f 4476
a3530df3 4477 return auth;
4e7a5dcd
SW		 4478}
4479
4480
0dde5848 4481static int verify_authorizer_reply(struct ceph_connection *con)
4e7a5dcd
SW		 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
0dde5848 4487 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
4e7a5dcd
SW		 4488}
4489
9bd2e6f8
SW		 4490static int invalidate_authorizer(struct ceph_connection *con)
4491{
4492 struct ceph_osd *o = con->private;
4493 struct ceph_osd_client *osdc = o->o_osdc;
4494 struct ceph_auth_client *ac = osdc->client->monc.auth;
4495
27859f97 4496 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 4497 return ceph_monc_validate_auth(&osdc->client->monc);
4498}
4e7a5dcd 4499
79dbd1ba 4500static int osd_sign_message(struct ceph_msg *msg)
33d07337 4501{
79dbd1ba 4502 struct ceph_osd *o = msg->con->private;
33d07337 4503 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 4504
33d07337
YZ		 4505 return ceph_auth_sign_message(auth, msg);
4506}
4507
79dbd1ba 4508static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 4509{
79dbd1ba 4510 struct ceph_osd *o = msg->con->private;
33d07337 4511 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 4512
33d07337
YZ		 4513 return ceph_auth_check_message_signature(auth, msg);
4514}
4515
9e32789f 4516static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 4517 .get = get_osd_con,
4518 .put = put_osd_con,
4519 .dispatch = dispatch,
4e7a5dcd
SW		 4520 .get_authorizer = get_authorizer,
4521 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 4522 .invalidate_authorizer = invalidate_authorizer,
f24e9980 4523 .alloc_msg = alloc_msg,
79dbd1ba
ID		 4524 .sign_message = osd_sign_message,
4525 .check_message_signature = osd_check_message_signature,
5aea3dcd 4526 .fault = osd_fault,
f24e9980 4527};
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