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libceph: encode_{pgid,oloc}() helpers
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1
2#include <linux/ceph/ceph_debug.h>
3
4#include <linux/module.h>
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>
11#ifdef CONFIG_BLOCK
12#include <linux/bio.h>
13#endif
14
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>
21
22#define OSD_OPREPLY_FRONT_LEN 512
23
24static struct kmem_cache *ceph_osd_request_cache;
25
26static const struct ceph_connection_operations osd_con_ops;
27
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
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);
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);
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}
81static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
82{
83 WARN_ON(!mutex_is_locked(&lreq->lock));
84}
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) { }
89static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
90#endif
91
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 */
99static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
100 u64 *objnum, u64 *objoff, u64 *objlen)
101{
102 u64 orig_len = *plen;
103 int r;
104
105 /* object extent? */
106 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
107 objoff, objlen);
108 if (r < 0)
109 return r;
110 if (*objlen < orig_len) {
111 *plen = *objlen;
112 dout(" skipping last %llu, final file extent %llu~%llu\n",
113 orig_len - *plen, off, *plen);
114 }
115
116 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
117
118 return 0;
119}
120
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
127static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
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}
138
139static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
140 struct ceph_pagelist *pagelist)
141{
142 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
143 osd_data->pagelist = pagelist;
144}
145
146#ifdef CONFIG_BLOCK
147static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
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}
154#endif /* CONFIG_BLOCK */
155
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})
163
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
172struct ceph_osd_data *
173osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
174 unsigned int which)
175{
176 return osd_req_op_data(osd_req, which, extent, osd_data);
177}
178EXPORT_SYMBOL(osd_req_op_extent_osd_data);
179
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
193void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
194 unsigned int which, struct page **pages,
195 u64 length, u32 alignment,
196 bool pages_from_pool, bool own_pages)
197{
198 struct ceph_osd_data *osd_data;
199
200 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
201 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
202 pages_from_pool, own_pages);
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,
207 unsigned int which, struct ceph_pagelist *pagelist)
208{
209 struct ceph_osd_data *osd_data;
210
211 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
212 ceph_osd_data_pagelist_init(osd_data, pagelist);
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,
218 unsigned int which, struct bio *bio, size_t bio_length)
219{
220 struct ceph_osd_data *osd_data;
221
222 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
223 ceph_osd_data_bio_init(osd_data, bio, bio_length);
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
234 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
235 ceph_osd_data_pagelist_init(osd_data, pagelist);
236}
237
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
244 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
245 ceph_osd_data_pagelist_init(osd_data, pagelist);
246 osd_req->r_ops[which].cls.indata_len += pagelist->length;
247 osd_req->r_ops[which].indata_len += pagelist->length;
248}
249EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
250
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);
260 osd_req->r_ops[which].cls.indata_len += length;
261 osd_req->r_ops[which].indata_len += length;
262}
263EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
264
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
271 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
272 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
273 pages_from_pool, own_pages);
274}
275EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
276
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
296static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
297{
298 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
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 }
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:
319 case CEPH_OSD_OP_WRITEFULL:
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);
324 ceph_osd_data_release(&op->cls.request_data);
325 ceph_osd_data_release(&op->cls.response_data);
326 break;
327 case CEPH_OSD_OP_SETXATTR:
328 case CEPH_OSD_OP_CMPXATTR:
329 ceph_osd_data_release(&op->xattr.osd_data);
330 break;
331 case CEPH_OSD_OP_STAT:
332 ceph_osd_data_release(&op->raw_data_in);
333 break;
334 case CEPH_OSD_OP_NOTIFY_ACK:
335 ceph_osd_data_release(&op->notify_ack.request_data);
336 break;
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;
341 case CEPH_OSD_OP_LIST_WATCHERS:
342 ceph_osd_data_release(&op->list_watchers.response_data);
343 break;
344 default:
345 break;
346 }
347}
348
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
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->spgid = src->spgid; /* struct */
377 dest->pg_num = src->pg_num;
378 dest->pg_num_mask = src->pg_num_mask;
379 ceph_osds_copy(&dest->acting, &src->acting);
380 ceph_osds_copy(&dest->up, &src->up);
381 dest->size = src->size;
382 dest->min_size = src->min_size;
383 dest->sort_bitwise = src->sort_bitwise;
384
385 dest->flags = src->flags;
386 dest->paused = src->paused;
387
388 dest->last_force_resend = src->last_force_resend;
389
390 dest->osd = src->osd;
391}
392
393static void target_destroy(struct ceph_osd_request_target *t)
394{
395 ceph_oid_destroy(&t->base_oid);
396 ceph_oloc_destroy(&t->base_oloc);
397 ceph_oid_destroy(&t->target_oid);
398 ceph_oloc_destroy(&t->target_oloc);
399}
400
401/*
402 * requests
403 */
404static void request_release_checks(struct ceph_osd_request *req)
405{
406 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
407 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
408 WARN_ON(!list_empty(&req->r_unsafe_item));
409 WARN_ON(req->r_osd);
410}
411
412static void ceph_osdc_release_request(struct kref *kref)
413{
414 struct ceph_osd_request *req = container_of(kref,
415 struct ceph_osd_request, r_kref);
416 unsigned int which;
417
418 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
419 req->r_request, req->r_reply);
420 request_release_checks(req);
421
422 if (req->r_request)
423 ceph_msg_put(req->r_request);
424 if (req->r_reply)
425 ceph_msg_put(req->r_reply);
426
427 for (which = 0; which < req->r_num_ops; which++)
428 osd_req_op_data_release(req, which);
429
430 target_destroy(&req->r_t);
431 ceph_put_snap_context(req->r_snapc);
432
433 if (req->r_mempool)
434 mempool_free(req, req->r_osdc->req_mempool);
435 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
436 kmem_cache_free(ceph_osd_request_cache, req);
437 else
438 kfree(req);
439}
440
441void ceph_osdc_get_request(struct ceph_osd_request *req)
442{
443 dout("%s %p (was %d)\n", __func__, req,
444 kref_read(&req->r_kref));
445 kref_get(&req->r_kref);
446}
447EXPORT_SYMBOL(ceph_osdc_get_request);
448
449void ceph_osdc_put_request(struct ceph_osd_request *req)
450{
451 if (req) {
452 dout("%s %p (was %d)\n", __func__, req,
453 kref_read(&req->r_kref));
454 kref_put(&req->r_kref, ceph_osdc_release_request);
455 }
456}
457EXPORT_SYMBOL(ceph_osdc_put_request);
458
459static void request_init(struct ceph_osd_request *req)
460{
461 /* req only, each op is zeroed in _osd_req_op_init() */
462 memset(req, 0, sizeof(*req));
463
464 kref_init(&req->r_kref);
465 init_completion(&req->r_completion);
466 RB_CLEAR_NODE(&req->r_node);
467 RB_CLEAR_NODE(&req->r_mc_node);
468 INIT_LIST_HEAD(&req->r_unsafe_item);
469
470 target_init(&req->r_t);
471}
472
473/*
474 * This is ugly, but it allows us to reuse linger registration and ping
475 * requests, keeping the structure of the code around send_linger{_ping}()
476 * reasonable. Setting up a min_nr=2 mempool for each linger request
477 * and dealing with copying ops (this blasts req only, watch op remains
478 * intact) isn't any better.
479 */
480static void request_reinit(struct ceph_osd_request *req)
481{
482 struct ceph_osd_client *osdc = req->r_osdc;
483 bool mempool = req->r_mempool;
484 unsigned int num_ops = req->r_num_ops;
485 u64 snapid = req->r_snapid;
486 struct ceph_snap_context *snapc = req->r_snapc;
487 bool linger = req->r_linger;
488 struct ceph_msg *request_msg = req->r_request;
489 struct ceph_msg *reply_msg = req->r_reply;
490
491 dout("%s req %p\n", __func__, req);
492 WARN_ON(kref_read(&req->r_kref) != 1);
493 request_release_checks(req);
494
495 WARN_ON(kref_read(&request_msg->kref) != 1);
496 WARN_ON(kref_read(&reply_msg->kref) != 1);
497 target_destroy(&req->r_t);
498
499 request_init(req);
500 req->r_osdc = osdc;
501 req->r_mempool = mempool;
502 req->r_num_ops = num_ops;
503 req->r_snapid = snapid;
504 req->r_snapc = snapc;
505 req->r_linger = linger;
506 req->r_request = request_msg;
507 req->r_reply = reply_msg;
508}
509
510struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
511 struct ceph_snap_context *snapc,
512 unsigned int num_ops,
513 bool use_mempool,
514 gfp_t gfp_flags)
515{
516 struct ceph_osd_request *req;
517
518 if (use_mempool) {
519 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
520 req = mempool_alloc(osdc->req_mempool, gfp_flags);
521 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
522 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
523 } else {
524 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
525 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
526 gfp_flags);
527 }
528 if (unlikely(!req))
529 return NULL;
530
531 request_init(req);
532 req->r_osdc = osdc;
533 req->r_mempool = use_mempool;
534 req->r_num_ops = num_ops;
535 req->r_snapid = CEPH_NOSNAP;
536 req->r_snapc = ceph_get_snap_context(snapc);
537
538 dout("%s req %p\n", __func__, req);
539 return req;
540}
541EXPORT_SYMBOL(ceph_osdc_alloc_request);
542
543static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
544{
545 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
546}
547
548int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
549{
550 struct ceph_osd_client *osdc = req->r_osdc;
551 struct ceph_msg *msg;
552 int msg_size;
553
554 WARN_ON(ceph_oid_empty(&req->r_base_oid));
555 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
556
557 /* create request message */
558 msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
559 msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
560 msg_size += CEPH_ENCODING_START_BLK_LEN +
561 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
562 msg_size += 1 + 8 + 4 + 4; /* pgid */
563 msg_size += 4 + req->r_base_oid.name_len; /* oid */
564 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
565 msg_size += 8; /* snapid */
566 msg_size += 8; /* snap_seq */
567 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
568 msg_size += 4; /* retry_attempt */
569
570 if (req->r_mempool)
571 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
572 else
573 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
574 if (!msg)
575 return -ENOMEM;
576
577 memset(msg->front.iov_base, 0, msg->front.iov_len);
578 req->r_request = msg;
579
580 /* create reply message */
581 msg_size = OSD_OPREPLY_FRONT_LEN;
582 msg_size += req->r_base_oid.name_len;
583 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
584
585 if (req->r_mempool)
586 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
587 else
588 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
589 if (!msg)
590 return -ENOMEM;
591
592 req->r_reply = msg;
593
594 return 0;
595}
596EXPORT_SYMBOL(ceph_osdc_alloc_messages);
597
598static bool osd_req_opcode_valid(u16 opcode)
599{
600 switch (opcode) {
601#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
602__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
603#undef GENERATE_CASE
604 default:
605 return false;
606 }
607}
608
609/*
610 * This is an osd op init function for opcodes that have no data or
611 * other information associated with them. It also serves as a
612 * common init routine for all the other init functions, below.
613 */
614static struct ceph_osd_req_op *
615_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
616 u16 opcode, u32 flags)
617{
618 struct ceph_osd_req_op *op;
619
620 BUG_ON(which >= osd_req->r_num_ops);
621 BUG_ON(!osd_req_opcode_valid(opcode));
622
623 op = &osd_req->r_ops[which];
624 memset(op, 0, sizeof (*op));
625 op->op = opcode;
626 op->flags = flags;
627
628 return op;
629}
630
631void osd_req_op_init(struct ceph_osd_request *osd_req,
632 unsigned int which, u16 opcode, u32 flags)
633{
634 (void)_osd_req_op_init(osd_req, which, opcode, flags);
635}
636EXPORT_SYMBOL(osd_req_op_init);
637
638void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
639 unsigned int which, u16 opcode,
640 u64 offset, u64 length,
641 u64 truncate_size, u32 truncate_seq)
642{
643 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
644 opcode, 0);
645 size_t payload_len = 0;
646
647 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
648 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
649 opcode != CEPH_OSD_OP_TRUNCATE);
650
651 op->extent.offset = offset;
652 op->extent.length = length;
653 op->extent.truncate_size = truncate_size;
654 op->extent.truncate_seq = truncate_seq;
655 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
656 payload_len += length;
657
658 op->indata_len = payload_len;
659}
660EXPORT_SYMBOL(osd_req_op_extent_init);
661
662void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
663 unsigned int which, u64 length)
664{
665 struct ceph_osd_req_op *op;
666 u64 previous;
667
668 BUG_ON(which >= osd_req->r_num_ops);
669 op = &osd_req->r_ops[which];
670 previous = op->extent.length;
671
672 if (length == previous)
673 return; /* Nothing to do */
674 BUG_ON(length > previous);
675
676 op->extent.length = length;
677 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
678 op->indata_len -= previous - length;
679}
680EXPORT_SYMBOL(osd_req_op_extent_update);
681
682void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
683 unsigned int which, u64 offset_inc)
684{
685 struct ceph_osd_req_op *op, *prev_op;
686
687 BUG_ON(which + 1 >= osd_req->r_num_ops);
688
689 prev_op = &osd_req->r_ops[which];
690 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
691 /* dup previous one */
692 op->indata_len = prev_op->indata_len;
693 op->outdata_len = prev_op->outdata_len;
694 op->extent = prev_op->extent;
695 /* adjust offset */
696 op->extent.offset += offset_inc;
697 op->extent.length -= offset_inc;
698
699 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
700 op->indata_len -= offset_inc;
701}
702EXPORT_SYMBOL(osd_req_op_extent_dup_last);
703
704void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
705 u16 opcode, const char *class, const char *method)
706{
707 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
708 opcode, 0);
709 struct ceph_pagelist *pagelist;
710 size_t payload_len = 0;
711 size_t size;
712
713 BUG_ON(opcode != CEPH_OSD_OP_CALL);
714
715 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
716 BUG_ON(!pagelist);
717 ceph_pagelist_init(pagelist);
718
719 op->cls.class_name = class;
720 size = strlen(class);
721 BUG_ON(size > (size_t) U8_MAX);
722 op->cls.class_len = size;
723 ceph_pagelist_append(pagelist, class, size);
724 payload_len += size;
725
726 op->cls.method_name = method;
727 size = strlen(method);
728 BUG_ON(size > (size_t) U8_MAX);
729 op->cls.method_len = size;
730 ceph_pagelist_append(pagelist, method, size);
731 payload_len += size;
732
733 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
734
735 op->indata_len = payload_len;
736}
737EXPORT_SYMBOL(osd_req_op_cls_init);
738
739int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
740 u16 opcode, const char *name, const void *value,
741 size_t size, u8 cmp_op, u8 cmp_mode)
742{
743 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
744 opcode, 0);
745 struct ceph_pagelist *pagelist;
746 size_t payload_len;
747
748 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
749
750 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
751 if (!pagelist)
752 return -ENOMEM;
753
754 ceph_pagelist_init(pagelist);
755
756 payload_len = strlen(name);
757 op->xattr.name_len = payload_len;
758 ceph_pagelist_append(pagelist, name, payload_len);
759
760 op->xattr.value_len = size;
761 ceph_pagelist_append(pagelist, value, size);
762 payload_len += size;
763
764 op->xattr.cmp_op = cmp_op;
765 op->xattr.cmp_mode = cmp_mode;
766
767 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
768 op->indata_len = payload_len;
769 return 0;
770}
771EXPORT_SYMBOL(osd_req_op_xattr_init);
772
773/*
774 * @watch_opcode: CEPH_OSD_WATCH_OP_*
775 */
776static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
777 u64 cookie, u8 watch_opcode)
778{
779 struct ceph_osd_req_op *op;
780
781 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
782 op->watch.cookie = cookie;
783 op->watch.op = watch_opcode;
784 op->watch.gen = 0;
785}
786
787void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
788 unsigned int which,
789 u64 expected_object_size,
790 u64 expected_write_size)
791{
792 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
793 CEPH_OSD_OP_SETALLOCHINT,
794 0);
795
796 op->alloc_hint.expected_object_size = expected_object_size;
797 op->alloc_hint.expected_write_size = expected_write_size;
798
799 /*
800 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
801 * not worth a feature bit. Set FAILOK per-op flag to make
802 * sure older osds don't trip over an unsupported opcode.
803 */
804 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
805}
806EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
807
808static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
809 struct ceph_osd_data *osd_data)
810{
811 u64 length = ceph_osd_data_length(osd_data);
812
813 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
814 BUG_ON(length > (u64) SIZE_MAX);
815 if (length)
816 ceph_msg_data_add_pages(msg, osd_data->pages,
817 length, osd_data->alignment);
818 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
819 BUG_ON(!length);
820 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
821#ifdef CONFIG_BLOCK
822 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
823 ceph_msg_data_add_bio(msg, osd_data->bio, length);
824#endif
825 } else {
826 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
827 }
828}
829
830static u32 osd_req_encode_op(struct ceph_osd_op *dst,
831 const struct ceph_osd_req_op *src)
832{
833 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
834 pr_err("unrecognized osd opcode %d\n", src->op);
835
836 return 0;
837 }
838
839 switch (src->op) {
840 case CEPH_OSD_OP_STAT:
841 break;
842 case CEPH_OSD_OP_READ:
843 case CEPH_OSD_OP_WRITE:
844 case CEPH_OSD_OP_WRITEFULL:
845 case CEPH_OSD_OP_ZERO:
846 case CEPH_OSD_OP_TRUNCATE:
847 dst->extent.offset = cpu_to_le64(src->extent.offset);
848 dst->extent.length = cpu_to_le64(src->extent.length);
849 dst->extent.truncate_size =
850 cpu_to_le64(src->extent.truncate_size);
851 dst->extent.truncate_seq =
852 cpu_to_le32(src->extent.truncate_seq);
853 break;
854 case CEPH_OSD_OP_CALL:
855 dst->cls.class_len = src->cls.class_len;
856 dst->cls.method_len = src->cls.method_len;
857 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
858 break;
859 case CEPH_OSD_OP_STARTSYNC:
860 break;
861 case CEPH_OSD_OP_WATCH:
862 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
863 dst->watch.ver = cpu_to_le64(0);
864 dst->watch.op = src->watch.op;
865 dst->watch.gen = cpu_to_le32(src->watch.gen);
866 break;
867 case CEPH_OSD_OP_NOTIFY_ACK:
868 break;
869 case CEPH_OSD_OP_NOTIFY:
870 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
871 break;
872 case CEPH_OSD_OP_LIST_WATCHERS:
873 break;
874 case CEPH_OSD_OP_SETALLOCHINT:
875 dst->alloc_hint.expected_object_size =
876 cpu_to_le64(src->alloc_hint.expected_object_size);
877 dst->alloc_hint.expected_write_size =
878 cpu_to_le64(src->alloc_hint.expected_write_size);
879 break;
880 case CEPH_OSD_OP_SETXATTR:
881 case CEPH_OSD_OP_CMPXATTR:
882 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
883 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
884 dst->xattr.cmp_op = src->xattr.cmp_op;
885 dst->xattr.cmp_mode = src->xattr.cmp_mode;
886 break;
887 case CEPH_OSD_OP_CREATE:
888 case CEPH_OSD_OP_DELETE:
889 break;
890 default:
891 pr_err("unsupported osd opcode %s\n",
892 ceph_osd_op_name(src->op));
893 WARN_ON(1);
894
895 return 0;
896 }
897
898 dst->op = cpu_to_le16(src->op);
899 dst->flags = cpu_to_le32(src->flags);
900 dst->payload_len = cpu_to_le32(src->indata_len);
901
902 return src->indata_len;
903}
904
905/*
906 * build new request AND message, calculate layout, and adjust file
907 * extent as needed.
908 *
909 * if the file was recently truncated, we include information about its
910 * old and new size so that the object can be updated appropriately. (we
911 * avoid synchronously deleting truncated objects because it's slow.)
912 *
913 * if @do_sync, include a 'startsync' command so that the osd will flush
914 * data quickly.
915 */
916struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
917 struct ceph_file_layout *layout,
918 struct ceph_vino vino,
919 u64 off, u64 *plen,
920 unsigned int which, int num_ops,
921 int opcode, int flags,
922 struct ceph_snap_context *snapc,
923 u32 truncate_seq,
924 u64 truncate_size,
925 bool use_mempool)
926{
927 struct ceph_osd_request *req;
928 u64 objnum = 0;
929 u64 objoff = 0;
930 u64 objlen = 0;
931 int r;
932
933 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
934 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
935 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
936
937 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
938 GFP_NOFS);
939 if (!req) {
940 r = -ENOMEM;
941 goto fail;
942 }
943
944 /* calculate max write size */
945 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
946 if (r)
947 goto fail;
948
949 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
950 osd_req_op_init(req, which, opcode, 0);
951 } else {
952 u32 object_size = layout->object_size;
953 u32 object_base = off - objoff;
954 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
955 if (truncate_size <= object_base) {
956 truncate_size = 0;
957 } else {
958 truncate_size -= object_base;
959 if (truncate_size > object_size)
960 truncate_size = object_size;
961 }
962 }
963 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
964 truncate_size, truncate_seq);
965 }
966
967 req->r_abort_on_full = true;
968 req->r_flags = flags;
969 req->r_base_oloc.pool = layout->pool_id;
970 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
971 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
972
973 req->r_snapid = vino.snap;
974 if (flags & CEPH_OSD_FLAG_WRITE)
975 req->r_data_offset = off;
976
977 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
978 if (r)
979 goto fail;
980
981 return req;
982
983fail:
984 ceph_osdc_put_request(req);
985 return ERR_PTR(r);
986}
987EXPORT_SYMBOL(ceph_osdc_new_request);
988
989/*
990 * We keep osd requests in an rbtree, sorted by ->r_tid.
991 */
992DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
993DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
994
995static bool osd_homeless(struct ceph_osd *osd)
996{
997 return osd->o_osd == CEPH_HOMELESS_OSD;
998}
999
1000static bool osd_registered(struct ceph_osd *osd)
1001{
1002 verify_osdc_locked(osd->o_osdc);
1003
1004 return !RB_EMPTY_NODE(&osd->o_node);
1005}
1006
1007/*
1008 * Assumes @osd is zero-initialized.
1009 */
1010static void osd_init(struct ceph_osd *osd)
1011{
1012 refcount_set(&osd->o_ref, 1);
1013 RB_CLEAR_NODE(&osd->o_node);
1014 osd->o_requests = RB_ROOT;
1015 osd->o_linger_requests = RB_ROOT;
1016 INIT_LIST_HEAD(&osd->o_osd_lru);
1017 INIT_LIST_HEAD(&osd->o_keepalive_item);
1018 osd->o_incarnation = 1;
1019 mutex_init(&osd->lock);
1020}
1021
1022static void osd_cleanup(struct ceph_osd *osd)
1023{
1024 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1025 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1026 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1027 WARN_ON(!list_empty(&osd->o_osd_lru));
1028 WARN_ON(!list_empty(&osd->o_keepalive_item));
1029
1030 if (osd->o_auth.authorizer) {
1031 WARN_ON(osd_homeless(osd));
1032 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1033 }
1034}
1035
1036/*
1037 * Track open sessions with osds.
1038 */
1039static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1040{
1041 struct ceph_osd *osd;
1042
1043 WARN_ON(onum == CEPH_HOMELESS_OSD);
1044
1045 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1046 osd_init(osd);
1047 osd->o_osdc = osdc;
1048 osd->o_osd = onum;
1049
1050 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1051
1052 return osd;
1053}
1054
1055static struct ceph_osd *get_osd(struct ceph_osd *osd)
1056{
1057 if (refcount_inc_not_zero(&osd->o_ref)) {
1058 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1059 refcount_read(&osd->o_ref));
1060 return osd;
1061 } else {
1062 dout("get_osd %p FAIL\n", osd);
1063 return NULL;
1064 }
1065}
1066
1067static void put_osd(struct ceph_osd *osd)
1068{
1069 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1070 refcount_read(&osd->o_ref) - 1);
1071 if (refcount_dec_and_test(&osd->o_ref)) {
1072 osd_cleanup(osd);
1073 kfree(osd);
1074 }
1075}
1076
1077DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1078
1079static void __move_osd_to_lru(struct ceph_osd *osd)
1080{
1081 struct ceph_osd_client *osdc = osd->o_osdc;
1082
1083 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1084 BUG_ON(!list_empty(&osd->o_osd_lru));
1085
1086 spin_lock(&osdc->osd_lru_lock);
1087 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1088 spin_unlock(&osdc->osd_lru_lock);
1089
1090 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1091}
1092
1093static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1094{
1095 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1096 RB_EMPTY_ROOT(&osd->o_linger_requests))
1097 __move_osd_to_lru(osd);
1098}
1099
1100static void __remove_osd_from_lru(struct ceph_osd *osd)
1101{
1102 struct ceph_osd_client *osdc = osd->o_osdc;
1103
1104 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1105
1106 spin_lock(&osdc->osd_lru_lock);
1107 if (!list_empty(&osd->o_osd_lru))
1108 list_del_init(&osd->o_osd_lru);
1109 spin_unlock(&osdc->osd_lru_lock);
1110}
1111
1112/*
1113 * Close the connection and assign any leftover requests to the
1114 * homeless session.
1115 */
1116static void close_osd(struct ceph_osd *osd)
1117{
1118 struct ceph_osd_client *osdc = osd->o_osdc;
1119 struct rb_node *n;
1120
1121 verify_osdc_wrlocked(osdc);
1122 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1123
1124 ceph_con_close(&osd->o_con);
1125
1126 for (n = rb_first(&osd->o_requests); n; ) {
1127 struct ceph_osd_request *req =
1128 rb_entry(n, struct ceph_osd_request, r_node);
1129
1130 n = rb_next(n); /* unlink_request() */
1131
1132 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1133 unlink_request(osd, req);
1134 link_request(&osdc->homeless_osd, req);
1135 }
1136 for (n = rb_first(&osd->o_linger_requests); n; ) {
1137 struct ceph_osd_linger_request *lreq =
1138 rb_entry(n, struct ceph_osd_linger_request, node);
1139
1140 n = rb_next(n); /* unlink_linger() */
1141
1142 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1143 lreq->linger_id);
1144 unlink_linger(osd, lreq);
1145 link_linger(&osdc->homeless_osd, lreq);
1146 }
1147
1148 __remove_osd_from_lru(osd);
1149 erase_osd(&osdc->osds, osd);
1150 put_osd(osd);
1151}
1152
1153/*
1154 * reset osd connect
1155 */
1156static int reopen_osd(struct ceph_osd *osd)
1157{
1158 struct ceph_entity_addr *peer_addr;
1159
1160 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1161
1162 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1163 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1164 close_osd(osd);
1165 return -ENODEV;
1166 }
1167
1168 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1169 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1170 !ceph_con_opened(&osd->o_con)) {
1171 struct rb_node *n;
1172
1173 dout("osd addr hasn't changed and connection never opened, "
1174 "letting msgr retry\n");
1175 /* touch each r_stamp for handle_timeout()'s benfit */
1176 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1177 struct ceph_osd_request *req =
1178 rb_entry(n, struct ceph_osd_request, r_node);
1179 req->r_stamp = jiffies;
1180 }
1181
1182 return -EAGAIN;
1183 }
1184
1185 ceph_con_close(&osd->o_con);
1186 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1187 osd->o_incarnation++;
1188
1189 return 0;
1190}
1191
1192static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1193 bool wrlocked)
1194{
1195 struct ceph_osd *osd;
1196
1197 if (wrlocked)
1198 verify_osdc_wrlocked(osdc);
1199 else
1200 verify_osdc_locked(osdc);
1201
1202 if (o != CEPH_HOMELESS_OSD)
1203 osd = lookup_osd(&osdc->osds, o);
1204 else
1205 osd = &osdc->homeless_osd;
1206 if (!osd) {
1207 if (!wrlocked)
1208 return ERR_PTR(-EAGAIN);
1209
1210 osd = create_osd(osdc, o);
1211 insert_osd(&osdc->osds, osd);
1212 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1213 &osdc->osdmap->osd_addr[osd->o_osd]);
1214 }
1215
1216 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1217 return osd;
1218}
1219
1220/*
1221 * Create request <-> OSD session relation.
1222 *
1223 * @req has to be assigned a tid, @osd may be homeless.
1224 */
1225static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1226{
1227 verify_osd_locked(osd);
1228 WARN_ON(!req->r_tid || req->r_osd);
1229 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1230 req, req->r_tid);
1231
1232 if (!osd_homeless(osd))
1233 __remove_osd_from_lru(osd);
1234 else
1235 atomic_inc(&osd->o_osdc->num_homeless);
1236
1237 get_osd(osd);
1238 insert_request(&osd->o_requests, req);
1239 req->r_osd = osd;
1240}
1241
1242static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1243{
1244 verify_osd_locked(osd);
1245 WARN_ON(req->r_osd != osd);
1246 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1247 req, req->r_tid);
1248
1249 req->r_osd = NULL;
1250 erase_request(&osd->o_requests, req);
1251 put_osd(osd);
1252
1253 if (!osd_homeless(osd))
1254 maybe_move_osd_to_lru(osd);
1255 else
1256 atomic_dec(&osd->o_osdc->num_homeless);
1257}
1258
1259static bool __pool_full(struct ceph_pg_pool_info *pi)
1260{
1261 return pi->flags & CEPH_POOL_FLAG_FULL;
1262}
1263
1264static bool have_pool_full(struct ceph_osd_client *osdc)
1265{
1266 struct rb_node *n;
1267
1268 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1269 struct ceph_pg_pool_info *pi =
1270 rb_entry(n, struct ceph_pg_pool_info, node);
1271
1272 if (__pool_full(pi))
1273 return true;
1274 }
1275
1276 return false;
1277}
1278
1279static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1280{
1281 struct ceph_pg_pool_info *pi;
1282
1283 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1284 if (!pi)
1285 return false;
1286
1287 return __pool_full(pi);
1288}
1289
1290/*
1291 * Returns whether a request should be blocked from being sent
1292 * based on the current osdmap and osd_client settings.
1293 */
1294static bool target_should_be_paused(struct ceph_osd_client *osdc,
1295 const struct ceph_osd_request_target *t,
1296 struct ceph_pg_pool_info *pi)
1297{
1298 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1299 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1300 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1301 __pool_full(pi);
1302
1303 WARN_ON(pi->id != t->base_oloc.pool);
1304 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1305 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1306 (osdc->osdmap->epoch < osdc->epoch_barrier);
1307}
1308
1309enum calc_target_result {
1310 CALC_TARGET_NO_ACTION = 0,
1311 CALC_TARGET_NEED_RESEND,
1312 CALC_TARGET_POOL_DNE,
1313};
1314
1315static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1316 struct ceph_osd_request_target *t,
1317 bool any_change)
1318{
1319 struct ceph_pg_pool_info *pi;
1320 struct ceph_pg pgid, last_pgid;
1321 struct ceph_osds up, acting;
1322 bool force_resend = false;
1323 bool need_check_tiering = false;
1324 bool need_resend = false;
1325 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1326 enum calc_target_result ct_res;
1327 int ret;
1328
1329 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1330 if (!pi) {
1331 t->osd = CEPH_HOMELESS_OSD;
1332 ct_res = CALC_TARGET_POOL_DNE;
1333 goto out;
1334 }
1335
1336 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1337 if (t->last_force_resend < pi->last_force_request_resend) {
1338 t->last_force_resend = pi->last_force_request_resend;
1339 force_resend = true;
1340 } else if (t->last_force_resend == 0) {
1341 force_resend = true;
1342 }
1343 }
1344 if (ceph_oid_empty(&t->target_oid) || force_resend) {
1345 ceph_oid_copy(&t->target_oid, &t->base_oid);
1346 need_check_tiering = true;
1347 }
1348 if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
1349 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1350 need_check_tiering = true;
1351 }
1352
1353 if (need_check_tiering &&
1354 (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1355 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1356 t->target_oloc.pool = pi->read_tier;
1357 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1358 t->target_oloc.pool = pi->write_tier;
1359 }
1360
1361 ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
1362 &t->target_oloc, &pgid);
1363 if (ret) {
1364 WARN_ON(ret != -ENOENT);
1365 t->osd = CEPH_HOMELESS_OSD;
1366 ct_res = CALC_TARGET_POOL_DNE;
1367 goto out;
1368 }
1369 last_pgid.pool = pgid.pool;
1370 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1371
1372 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
1373 if (any_change &&
1374 ceph_is_new_interval(&t->acting,
1375 &acting,
1376 &t->up,
1377 &up,
1378 t->size,
1379 pi->size,
1380 t->min_size,
1381 pi->min_size,
1382 t->pg_num,
1383 pi->pg_num,
1384 t->sort_bitwise,
1385 sort_bitwise,
1386 &last_pgid))
1387 force_resend = true;
1388
1389 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1390 t->paused = false;
1391 need_resend = true;
1392 }
1393
1394 if (ceph_pg_compare(&t->pgid, &pgid) ||
1395 ceph_osds_changed(&t->acting, &acting, any_change) ||
1396 force_resend) {
1397 t->pgid = pgid; /* struct */
1398 ceph_pg_to_primary_shard(osdc->osdmap, &pgid, &t->spgid);
1399 ceph_osds_copy(&t->acting, &acting);
1400 ceph_osds_copy(&t->up, &up);
1401 t->size = pi->size;
1402 t->min_size = pi->min_size;
1403 t->pg_num = pi->pg_num;
1404 t->pg_num_mask = pi->pg_num_mask;
1405 t->sort_bitwise = sort_bitwise;
1406
1407 t->osd = acting.primary;
1408 need_resend = true;
1409 }
1410
1411 ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION;
1412out:
1413 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1414 return ct_res;
1415}
1416
1417static void setup_request_data(struct ceph_osd_request *req,
1418 struct ceph_msg *msg)
1419{
1420 u32 data_len = 0;
1421 int i;
1422
1423 if (!list_empty(&msg->data))
1424 return;
1425
1426 WARN_ON(msg->data_length);
1427 for (i = 0; i < req->r_num_ops; i++) {
1428 struct ceph_osd_req_op *op = &req->r_ops[i];
1429
1430 switch (op->op) {
1431 /* request */
1432 case CEPH_OSD_OP_WRITE:
1433 case CEPH_OSD_OP_WRITEFULL:
1434 WARN_ON(op->indata_len != op->extent.length);
1435 ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1436 break;
1437 case CEPH_OSD_OP_SETXATTR:
1438 case CEPH_OSD_OP_CMPXATTR:
1439 WARN_ON(op->indata_len != op->xattr.name_len +
1440 op->xattr.value_len);
1441 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1442 break;
1443 case CEPH_OSD_OP_NOTIFY_ACK:
1444 ceph_osdc_msg_data_add(msg,
1445 &op->notify_ack.request_data);
1446 break;
1447
1448 /* reply */
1449 case CEPH_OSD_OP_STAT:
1450 ceph_osdc_msg_data_add(req->r_reply,
1451 &op->raw_data_in);
1452 break;
1453 case CEPH_OSD_OP_READ:
1454 ceph_osdc_msg_data_add(req->r_reply,
1455 &op->extent.osd_data);
1456 break;
1457 case CEPH_OSD_OP_LIST_WATCHERS:
1458 ceph_osdc_msg_data_add(req->r_reply,
1459 &op->list_watchers.response_data);
1460 break;
1461
1462 /* both */
1463 case CEPH_OSD_OP_CALL:
1464 WARN_ON(op->indata_len != op->cls.class_len +
1465 op->cls.method_len +
1466 op->cls.indata_len);
1467 ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1468 /* optional, can be NONE */
1469 ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1470 /* optional, can be NONE */
1471 ceph_osdc_msg_data_add(req->r_reply,
1472 &op->cls.response_data);
1473 break;
1474 case CEPH_OSD_OP_NOTIFY:
1475 ceph_osdc_msg_data_add(msg,
1476 &op->notify.request_data);
1477 ceph_osdc_msg_data_add(req->r_reply,
1478 &op->notify.response_data);
1479 break;
1480 }
1481
1482 data_len += op->indata_len;
1483 }
1484
1485 WARN_ON(data_len != msg->data_length);
1486}
1487
1488static void encode_pgid(void **p, const struct ceph_pg *pgid)
1489{
1490 ceph_encode_8(p, 1);
1491 ceph_encode_64(p, pgid->pool);
1492 ceph_encode_32(p, pgid->seed);
1493 ceph_encode_32(p, -1); /* preferred */
1494}
1495
1496static void encode_oloc(void **p, void *end,
1497 const struct ceph_object_locator *oloc)
1498{
1499 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
1500 ceph_encode_64(p, oloc->pool);
1501 ceph_encode_32(p, -1); /* preferred */
1502 ceph_encode_32(p, 0); /* key len */
1503 if (oloc->pool_ns)
1504 ceph_encode_string(p, end, oloc->pool_ns->str,
1505 oloc->pool_ns->len);
1506 else
1507 ceph_encode_32(p, 0);
1508}
1509
1510static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
1511{
1512 void *p = msg->front.iov_base;
1513 void *const end = p + msg->front_alloc_len;
1514 u32 data_len = 0;
1515 int i;
1516
1517 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1518 /* snapshots aren't writeable */
1519 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1520 } else {
1521 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1522 req->r_data_offset || req->r_snapc);
1523 }
1524
1525 setup_request_data(req, msg);
1526
1527 ceph_encode_32(&p, 1); /* client_inc, always 1 */
1528 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1529 ceph_encode_32(&p, req->r_flags);
1530 ceph_encode_timespec(p, &req->r_mtime);
1531 p += sizeof(struct ceph_timespec);
1532
1533 /* reassert_version */
1534 memset(p, 0, sizeof(struct ceph_eversion));
1535 p += sizeof(struct ceph_eversion);
1536
1537 encode_oloc(&p, end, &req->r_t.target_oloc);
1538 encode_pgid(&p, &req->r_t.pgid);
1539 ceph_encode_string(&p, end, req->r_t.target_oid.name,
1540 req->r_t.target_oid.name_len);
1541
1542 /* ops, can imply data */
1543 ceph_encode_16(&p, req->r_num_ops);
1544 for (i = 0; i < req->r_num_ops; i++) {
1545 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1546 p += sizeof(struct ceph_osd_op);
1547 }
1548
1549 ceph_encode_64(&p, req->r_snapid); /* snapid */
1550 if (req->r_snapc) {
1551 ceph_encode_64(&p, req->r_snapc->seq);
1552 ceph_encode_32(&p, req->r_snapc->num_snaps);
1553 for (i = 0; i < req->r_snapc->num_snaps; i++)
1554 ceph_encode_64(&p, req->r_snapc->snaps[i]);
1555 } else {
1556 ceph_encode_64(&p, 0); /* snap_seq */
1557 ceph_encode_32(&p, 0); /* snaps len */
1558 }
1559
1560 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
1561
1562 BUG_ON(p > end);
1563 msg->front.iov_len = p - msg->front.iov_base;
1564 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
1565 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
1566 msg->hdr.data_len = cpu_to_le32(data_len);
1567 /*
1568 * The header "data_off" is a hint to the receiver allowing it
1569 * to align received data into its buffers such that there's no
1570 * need to re-copy it before writing it to disk (direct I/O).
1571 */
1572 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
1573
1574 dout("%s req %p oid %s oid_len %d front %zu data %u\n", __func__,
1575 req, req->r_t.target_oid.name, req->r_t.target_oid.name_len,
1576 msg->front.iov_len, data_len);
1577}
1578
1579/*
1580 * @req has to be assigned a tid and registered.
1581 */
1582static void send_request(struct ceph_osd_request *req)
1583{
1584 struct ceph_osd *osd = req->r_osd;
1585
1586 verify_osd_locked(osd);
1587 WARN_ON(osd->o_osd != req->r_t.osd);
1588
1589 /*
1590 * We may have a previously queued request message hanging
1591 * around. Cancel it to avoid corrupting the msgr.
1592 */
1593 if (req->r_sent)
1594 ceph_msg_revoke(req->r_request);
1595
1596 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
1597 if (req->r_attempts)
1598 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1599 else
1600 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
1601
1602 encode_request(req, req->r_request);
1603
1604 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d flags 0x%x attempt %d\n",
1605 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
1606 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
1607 req->r_t.spgid.shard, osd->o_osd, req->r_flags, req->r_attempts);
1608
1609 req->r_t.paused = false;
1610 req->r_stamp = jiffies;
1611 req->r_attempts++;
1612
1613 req->r_sent = osd->o_incarnation;
1614 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1615 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
1616}
1617
1618static void maybe_request_map(struct ceph_osd_client *osdc)
1619{
1620 bool continuous = false;
1621
1622 verify_osdc_locked(osdc);
1623 WARN_ON(!osdc->osdmap->epoch);
1624
1625 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1626 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
1627 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
1628 dout("%s osdc %p continuous\n", __func__, osdc);
1629 continuous = true;
1630 } else {
1631 dout("%s osdc %p onetime\n", __func__, osdc);
1632 }
1633
1634 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
1635 osdc->osdmap->epoch + 1, continuous))
1636 ceph_monc_renew_subs(&osdc->client->monc);
1637}
1638
1639static void complete_request(struct ceph_osd_request *req, int err);
1640static void send_map_check(struct ceph_osd_request *req);
1641
1642static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
1643{
1644 struct ceph_osd_client *osdc = req->r_osdc;
1645 struct ceph_osd *osd;
1646 enum calc_target_result ct_res;
1647 bool need_send = false;
1648 bool promoted = false;
1649 bool need_abort = false;
1650
1651 WARN_ON(req->r_tid);
1652 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
1653
1654again:
1655 ct_res = calc_target(osdc, &req->r_t, false);
1656 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
1657 goto promote;
1658
1659 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
1660 if (IS_ERR(osd)) {
1661 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
1662 goto promote;
1663 }
1664
1665 if (osdc->osdmap->epoch < osdc->epoch_barrier) {
1666 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
1667 osdc->epoch_barrier);
1668 req->r_t.paused = true;
1669 maybe_request_map(osdc);
1670 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1671 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
1672 dout("req %p pausewr\n", req);
1673 req->r_t.paused = true;
1674 maybe_request_map(osdc);
1675 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1676 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
1677 dout("req %p pauserd\n", req);
1678 req->r_t.paused = true;
1679 maybe_request_map(osdc);
1680 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1681 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
1682 CEPH_OSD_FLAG_FULL_FORCE)) &&
1683 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1684 pool_full(osdc, req->r_t.base_oloc.pool))) {
1685 dout("req %p full/pool_full\n", req);
1686 pr_warn_ratelimited("FULL or reached pool quota\n");
1687 req->r_t.paused = true;
1688 maybe_request_map(osdc);
1689 if (req->r_abort_on_full)
1690 need_abort = true;
1691 } else if (!osd_homeless(osd)) {
1692 need_send = true;
1693 } else {
1694 maybe_request_map(osdc);
1695 }
1696
1697 mutex_lock(&osd->lock);
1698 /*
1699 * Assign the tid atomically with send_request() to protect
1700 * multiple writes to the same object from racing with each
1701 * other, resulting in out of order ops on the OSDs.
1702 */
1703 req->r_tid = atomic64_inc_return(&osdc->last_tid);
1704 link_request(osd, req);
1705 if (need_send)
1706 send_request(req);
1707 else if (need_abort)
1708 complete_request(req, -ENOSPC);
1709 mutex_unlock(&osd->lock);
1710
1711 if (ct_res == CALC_TARGET_POOL_DNE)
1712 send_map_check(req);
1713
1714 if (promoted)
1715 downgrade_write(&osdc->lock);
1716 return;
1717
1718promote:
1719 up_read(&osdc->lock);
1720 down_write(&osdc->lock);
1721 wrlocked = true;
1722 promoted = true;
1723 goto again;
1724}
1725
1726static void account_request(struct ceph_osd_request *req)
1727{
1728 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
1729 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
1730
1731 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
1732 atomic_inc(&req->r_osdc->num_requests);
1733
1734 req->r_start_stamp = jiffies;
1735}
1736
1737static void submit_request(struct ceph_osd_request *req, bool wrlocked)
1738{
1739 ceph_osdc_get_request(req);
1740 account_request(req);
1741 __submit_request(req, wrlocked);
1742}
1743
1744static void finish_request(struct ceph_osd_request *req)
1745{
1746 struct ceph_osd_client *osdc = req->r_osdc;
1747 struct ceph_osd *osd = req->r_osd;
1748
1749 verify_osd_locked(osd);
1750 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
1751
1752 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
1753 unlink_request(osd, req);
1754 atomic_dec(&osdc->num_requests);
1755
1756 /*
1757 * If an OSD has failed or returned and a request has been sent
1758 * twice, it's possible to get a reply and end up here while the
1759 * request message is queued for delivery. We will ignore the
1760 * reply, so not a big deal, but better to try and catch it.
1761 */
1762 ceph_msg_revoke(req->r_request);
1763 ceph_msg_revoke_incoming(req->r_reply);
1764}
1765
1766static void __complete_request(struct ceph_osd_request *req)
1767{
1768 if (req->r_callback) {
1769 dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
1770 req->r_tid, req->r_callback, req->r_result);
1771 req->r_callback(req);
1772 }
1773}
1774
1775/*
1776 * This is open-coded in handle_reply().
1777 */
1778static void complete_request(struct ceph_osd_request *req, int err)
1779{
1780 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
1781
1782 req->r_result = err;
1783 finish_request(req);
1784 __complete_request(req);
1785 complete_all(&req->r_completion);
1786 ceph_osdc_put_request(req);
1787}
1788
1789static void cancel_map_check(struct ceph_osd_request *req)
1790{
1791 struct ceph_osd_client *osdc = req->r_osdc;
1792 struct ceph_osd_request *lookup_req;
1793
1794 verify_osdc_wrlocked(osdc);
1795
1796 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
1797 if (!lookup_req)
1798 return;
1799
1800 WARN_ON(lookup_req != req);
1801 erase_request_mc(&osdc->map_checks, req);
1802 ceph_osdc_put_request(req);
1803}
1804
1805static void cancel_request(struct ceph_osd_request *req)
1806{
1807 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
1808
1809 cancel_map_check(req);
1810 finish_request(req);
1811 complete_all(&req->r_completion);
1812 ceph_osdc_put_request(req);
1813}
1814
1815static void abort_request(struct ceph_osd_request *req, int err)
1816{
1817 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
1818
1819 cancel_map_check(req);
1820 complete_request(req, err);
1821}
1822
1823static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
1824{
1825 if (likely(eb > osdc->epoch_barrier)) {
1826 dout("updating epoch_barrier from %u to %u\n",
1827 osdc->epoch_barrier, eb);
1828 osdc->epoch_barrier = eb;
1829 /* Request map if we're not to the barrier yet */
1830 if (eb > osdc->osdmap->epoch)
1831 maybe_request_map(osdc);
1832 }
1833}
1834
1835void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
1836{
1837 down_read(&osdc->lock);
1838 if (unlikely(eb > osdc->epoch_barrier)) {
1839 up_read(&osdc->lock);
1840 down_write(&osdc->lock);
1841 update_epoch_barrier(osdc, eb);
1842 up_write(&osdc->lock);
1843 } else {
1844 up_read(&osdc->lock);
1845 }
1846}
1847EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
1848
1849/*
1850 * Drop all pending requests that are stalled waiting on a full condition to
1851 * clear, and complete them with ENOSPC as the return code. Set the
1852 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
1853 * cancelled.
1854 */
1855static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
1856{
1857 struct rb_node *n;
1858 bool victims = false;
1859
1860 dout("enter abort_on_full\n");
1861
1862 if (!ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !have_pool_full(osdc))
1863 goto out;
1864
1865 /* Scan list and see if there is anything to abort */
1866 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1867 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1868 struct rb_node *m;
1869
1870 m = rb_first(&osd->o_requests);
1871 while (m) {
1872 struct ceph_osd_request *req = rb_entry(m,
1873 struct ceph_osd_request, r_node);
1874 m = rb_next(m);
1875
1876 if (req->r_abort_on_full) {
1877 victims = true;
1878 break;
1879 }
1880 }
1881 if (victims)
1882 break;
1883 }
1884
1885 if (!victims)
1886 goto out;
1887
1888 /*
1889 * Update the barrier to current epoch if it's behind that point,
1890 * since we know we have some calls to be aborted in the tree.
1891 */
1892 update_epoch_barrier(osdc, osdc->osdmap->epoch);
1893
1894 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1895 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1896 struct rb_node *m;
1897
1898 m = rb_first(&osd->o_requests);
1899 while (m) {
1900 struct ceph_osd_request *req = rb_entry(m,
1901 struct ceph_osd_request, r_node);
1902 m = rb_next(m);
1903
1904 if (req->r_abort_on_full &&
1905 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1906 pool_full(osdc, req->r_t.target_oloc.pool)))
1907 abort_request(req, -ENOSPC);
1908 }
1909 }
1910out:
1911 dout("return abort_on_full barrier=%u\n", osdc->epoch_barrier);
1912}
1913
1914static void check_pool_dne(struct ceph_osd_request *req)
1915{
1916 struct ceph_osd_client *osdc = req->r_osdc;
1917 struct ceph_osdmap *map = osdc->osdmap;
1918
1919 verify_osdc_wrlocked(osdc);
1920 WARN_ON(!map->epoch);
1921
1922 if (req->r_attempts) {
1923 /*
1924 * We sent a request earlier, which means that
1925 * previously the pool existed, and now it does not
1926 * (i.e., it was deleted).
1927 */
1928 req->r_map_dne_bound = map->epoch;
1929 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
1930 req->r_tid);
1931 } else {
1932 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
1933 req, req->r_tid, req->r_map_dne_bound, map->epoch);
1934 }
1935
1936 if (req->r_map_dne_bound) {
1937 if (map->epoch >= req->r_map_dne_bound) {
1938 /* we had a new enough map */
1939 pr_info_ratelimited("tid %llu pool does not exist\n",
1940 req->r_tid);
1941 complete_request(req, -ENOENT);
1942 }
1943 } else {
1944 send_map_check(req);
1945 }
1946}
1947
1948static void map_check_cb(struct ceph_mon_generic_request *greq)
1949{
1950 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
1951 struct ceph_osd_request *req;
1952 u64 tid = greq->private_data;
1953
1954 WARN_ON(greq->result || !greq->u.newest);
1955
1956 down_write(&osdc->lock);
1957 req = lookup_request_mc(&osdc->map_checks, tid);
1958 if (!req) {
1959 dout("%s tid %llu dne\n", __func__, tid);
1960 goto out_unlock;
1961 }
1962
1963 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
1964 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
1965 if (!req->r_map_dne_bound)
1966 req->r_map_dne_bound = greq->u.newest;
1967 erase_request_mc(&osdc->map_checks, req);
1968 check_pool_dne(req);
1969
1970 ceph_osdc_put_request(req);
1971out_unlock:
1972 up_write(&osdc->lock);
1973}
1974
1975static void send_map_check(struct ceph_osd_request *req)
1976{
1977 struct ceph_osd_client *osdc = req->r_osdc;
1978 struct ceph_osd_request *lookup_req;
1979 int ret;
1980
1981 verify_osdc_wrlocked(osdc);
1982
1983 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
1984 if (lookup_req) {
1985 WARN_ON(lookup_req != req);
1986 return;
1987 }
1988
1989 ceph_osdc_get_request(req);
1990 insert_request_mc(&osdc->map_checks, req);
1991 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
1992 map_check_cb, req->r_tid);
1993 WARN_ON(ret);
1994}
1995
1996/*
1997 * lingering requests, watch/notify v2 infrastructure
1998 */
1999static void linger_release(struct kref *kref)
2000{
2001 struct ceph_osd_linger_request *lreq =
2002 container_of(kref, struct ceph_osd_linger_request, kref);
2003
2004 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2005 lreq->reg_req, lreq->ping_req);
2006 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2007 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
2008 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2009 WARN_ON(!list_empty(&lreq->scan_item));
2010 WARN_ON(!list_empty(&lreq->pending_lworks));
2011 WARN_ON(lreq->osd);
2012
2013 if (lreq->reg_req)
2014 ceph_osdc_put_request(lreq->reg_req);
2015 if (lreq->ping_req)
2016 ceph_osdc_put_request(lreq->ping_req);
2017 target_destroy(&lreq->t);
2018 kfree(lreq);
2019}
2020
2021static void linger_put(struct ceph_osd_linger_request *lreq)
2022{
2023 if (lreq)
2024 kref_put(&lreq->kref, linger_release);
2025}
2026
2027static struct ceph_osd_linger_request *
2028linger_get(struct ceph_osd_linger_request *lreq)
2029{
2030 kref_get(&lreq->kref);
2031 return lreq;
2032}
2033
2034static struct ceph_osd_linger_request *
2035linger_alloc(struct ceph_osd_client *osdc)
2036{
2037 struct ceph_osd_linger_request *lreq;
2038
2039 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2040 if (!lreq)
2041 return NULL;
2042
2043 kref_init(&lreq->kref);
2044 mutex_init(&lreq->lock);
2045 RB_CLEAR_NODE(&lreq->node);
2046 RB_CLEAR_NODE(&lreq->osdc_node);
2047 RB_CLEAR_NODE(&lreq->mc_node);
2048 INIT_LIST_HEAD(&lreq->scan_item);
2049 INIT_LIST_HEAD(&lreq->pending_lworks);
2050 init_completion(&lreq->reg_commit_wait);
2051 init_completion(&lreq->notify_finish_wait);
2052
2053 lreq->osdc = osdc;
2054 target_init(&lreq->t);
2055
2056 dout("%s lreq %p\n", __func__, lreq);
2057 return lreq;
2058}
2059
2060DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2061DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
2062DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2063
2064/*
2065 * Create linger request <-> OSD session relation.
2066 *
2067 * @lreq has to be registered, @osd may be homeless.
2068 */
2069static void link_linger(struct ceph_osd *osd,
2070 struct ceph_osd_linger_request *lreq)
2071{
2072 verify_osd_locked(osd);
2073 WARN_ON(!lreq->linger_id || lreq->osd);
2074 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2075 osd->o_osd, lreq, lreq->linger_id);
2076
2077 if (!osd_homeless(osd))
2078 __remove_osd_from_lru(osd);
2079 else
2080 atomic_inc(&osd->o_osdc->num_homeless);
2081
2082 get_osd(osd);
2083 insert_linger(&osd->o_linger_requests, lreq);
2084 lreq->osd = osd;
2085}
2086
2087static void unlink_linger(struct ceph_osd *osd,
2088 struct ceph_osd_linger_request *lreq)
2089{
2090 verify_osd_locked(osd);
2091 WARN_ON(lreq->osd != osd);
2092 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2093 osd->o_osd, lreq, lreq->linger_id);
2094
2095 lreq->osd = NULL;
2096 erase_linger(&osd->o_linger_requests, lreq);
2097 put_osd(osd);
2098
2099 if (!osd_homeless(osd))
2100 maybe_move_osd_to_lru(osd);
2101 else
2102 atomic_dec(&osd->o_osdc->num_homeless);
2103}
2104
2105static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2106{
2107 verify_osdc_locked(lreq->osdc);
2108
2109 return !RB_EMPTY_NODE(&lreq->osdc_node);
2110}
2111
2112static bool linger_registered(struct ceph_osd_linger_request *lreq)
2113{
2114 struct ceph_osd_client *osdc = lreq->osdc;
2115 bool registered;
2116
2117 down_read(&osdc->lock);
2118 registered = __linger_registered(lreq);
2119 up_read(&osdc->lock);
2120
2121 return registered;
2122}
2123
2124static void linger_register(struct ceph_osd_linger_request *lreq)
2125{
2126 struct ceph_osd_client *osdc = lreq->osdc;
2127
2128 verify_osdc_wrlocked(osdc);
2129 WARN_ON(lreq->linger_id);
2130
2131 linger_get(lreq);
2132 lreq->linger_id = ++osdc->last_linger_id;
2133 insert_linger_osdc(&osdc->linger_requests, lreq);
2134}
2135
2136static void linger_unregister(struct ceph_osd_linger_request *lreq)
2137{
2138 struct ceph_osd_client *osdc = lreq->osdc;
2139
2140 verify_osdc_wrlocked(osdc);
2141
2142 erase_linger_osdc(&osdc->linger_requests, lreq);
2143 linger_put(lreq);
2144}
2145
2146static void cancel_linger_request(struct ceph_osd_request *req)
2147{
2148 struct ceph_osd_linger_request *lreq = req->r_priv;
2149
2150 WARN_ON(!req->r_linger);
2151 cancel_request(req);
2152 linger_put(lreq);
2153}
2154
2155struct linger_work {
2156 struct work_struct work;
2157 struct ceph_osd_linger_request *lreq;
2158 struct list_head pending_item;
2159 unsigned long queued_stamp;
2160
2161 union {
2162 struct {
2163 u64 notify_id;
2164 u64 notifier_id;
2165 void *payload; /* points into @msg front */
2166 size_t payload_len;
2167
2168 struct ceph_msg *msg; /* for ceph_msg_put() */
2169 } notify;
2170 struct {
2171 int err;
2172 } error;
2173 };
2174};
2175
2176static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2177 work_func_t workfn)
2178{
2179 struct linger_work *lwork;
2180
2181 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2182 if (!lwork)
2183 return NULL;
2184
2185 INIT_WORK(&lwork->work, workfn);
2186 INIT_LIST_HEAD(&lwork->pending_item);
2187 lwork->lreq = linger_get(lreq);
2188
2189 return lwork;
2190}
2191
2192static void lwork_free(struct linger_work *lwork)
2193{
2194 struct ceph_osd_linger_request *lreq = lwork->lreq;
2195
2196 mutex_lock(&lreq->lock);
2197 list_del(&lwork->pending_item);
2198 mutex_unlock(&lreq->lock);
2199
2200 linger_put(lreq);
2201 kfree(lwork);
2202}
2203
2204static void lwork_queue(struct linger_work *lwork)
2205{
2206 struct ceph_osd_linger_request *lreq = lwork->lreq;
2207 struct ceph_osd_client *osdc = lreq->osdc;
2208
2209 verify_lreq_locked(lreq);
2210 WARN_ON(!list_empty(&lwork->pending_item));
2211
2212 lwork->queued_stamp = jiffies;
2213 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2214 queue_work(osdc->notify_wq, &lwork->work);
2215}
2216
2217static void do_watch_notify(struct work_struct *w)
2218{
2219 struct linger_work *lwork = container_of(w, struct linger_work, work);
2220 struct ceph_osd_linger_request *lreq = lwork->lreq;
2221
2222 if (!linger_registered(lreq)) {
2223 dout("%s lreq %p not registered\n", __func__, lreq);
2224 goto out;
2225 }
2226
2227 WARN_ON(!lreq->is_watch);
2228 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2229 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2230 lwork->notify.payload_len);
2231 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2232 lwork->notify.notifier_id, lwork->notify.payload,
2233 lwork->notify.payload_len);
2234
2235out:
2236 ceph_msg_put(lwork->notify.msg);
2237 lwork_free(lwork);
2238}
2239
2240static void do_watch_error(struct work_struct *w)
2241{
2242 struct linger_work *lwork = container_of(w, struct linger_work, work);
2243 struct ceph_osd_linger_request *lreq = lwork->lreq;
2244
2245 if (!linger_registered(lreq)) {
2246 dout("%s lreq %p not registered\n", __func__, lreq);
2247 goto out;
2248 }
2249
2250 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2251 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2252
2253out:
2254 lwork_free(lwork);
2255}
2256
2257static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2258{
2259 struct linger_work *lwork;
2260
2261 lwork = lwork_alloc(lreq, do_watch_error);
2262 if (!lwork) {
2263 pr_err("failed to allocate error-lwork\n");
2264 return;
2265 }
2266
2267 lwork->error.err = lreq->last_error;
2268 lwork_queue(lwork);
2269}
2270
2271static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2272 int result)
2273{
2274 if (!completion_done(&lreq->reg_commit_wait)) {
2275 lreq->reg_commit_error = (result <= 0 ? result : 0);
2276 complete_all(&lreq->reg_commit_wait);
2277 }
2278}
2279
2280static void linger_commit_cb(struct ceph_osd_request *req)
2281{
2282 struct ceph_osd_linger_request *lreq = req->r_priv;
2283
2284 mutex_lock(&lreq->lock);
2285 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2286 lreq->linger_id, req->r_result);
2287 linger_reg_commit_complete(lreq, req->r_result);
2288 lreq->committed = true;
2289
2290 if (!lreq->is_watch) {
2291 struct ceph_osd_data *osd_data =
2292 osd_req_op_data(req, 0, notify, response_data);
2293 void *p = page_address(osd_data->pages[0]);
2294
2295 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2296 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2297
2298 /* make note of the notify_id */
2299 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2300 lreq->notify_id = ceph_decode_64(&p);
2301 dout("lreq %p notify_id %llu\n", lreq,
2302 lreq->notify_id);
2303 } else {
2304 dout("lreq %p no notify_id\n", lreq);
2305 }
2306 }
2307
2308 mutex_unlock(&lreq->lock);
2309 linger_put(lreq);
2310}
2311
2312static int normalize_watch_error(int err)
2313{
2314 /*
2315 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2316 * notification and a failure to reconnect because we raced with
2317 * the delete appear the same to the user.
2318 */
2319 if (err == -ENOENT)
2320 err = -ENOTCONN;
2321
2322 return err;
2323}
2324
2325static void linger_reconnect_cb(struct ceph_osd_request *req)
2326{
2327 struct ceph_osd_linger_request *lreq = req->r_priv;
2328
2329 mutex_lock(&lreq->lock);
2330 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2331 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2332 if (req->r_result < 0) {
2333 if (!lreq->last_error) {
2334 lreq->last_error = normalize_watch_error(req->r_result);
2335 queue_watch_error(lreq);
2336 }
2337 }
2338
2339 mutex_unlock(&lreq->lock);
2340 linger_put(lreq);
2341}
2342
2343static void send_linger(struct ceph_osd_linger_request *lreq)
2344{
2345 struct ceph_osd_request *req = lreq->reg_req;
2346 struct ceph_osd_req_op *op = &req->r_ops[0];
2347
2348 verify_osdc_wrlocked(req->r_osdc);
2349 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2350
2351 if (req->r_osd)
2352 cancel_linger_request(req);
2353
2354 request_reinit(req);
2355 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2356 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2357 req->r_flags = lreq->t.flags;
2358 req->r_mtime = lreq->mtime;
2359
2360 mutex_lock(&lreq->lock);
2361 if (lreq->is_watch && lreq->committed) {
2362 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2363 op->watch.cookie != lreq->linger_id);
2364 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2365 op->watch.gen = ++lreq->register_gen;
2366 dout("lreq %p reconnect register_gen %u\n", lreq,
2367 op->watch.gen);
2368 req->r_callback = linger_reconnect_cb;
2369 } else {
2370 if (!lreq->is_watch)
2371 lreq->notify_id = 0;
2372 else
2373 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
2374 dout("lreq %p register\n", lreq);
2375 req->r_callback = linger_commit_cb;
2376 }
2377 mutex_unlock(&lreq->lock);
2378
2379 req->r_priv = linger_get(lreq);
2380 req->r_linger = true;
2381
2382 submit_request(req, true);
2383}
2384
2385static void linger_ping_cb(struct ceph_osd_request *req)
2386{
2387 struct ceph_osd_linger_request *lreq = req->r_priv;
2388
2389 mutex_lock(&lreq->lock);
2390 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
2391 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
2392 lreq->last_error);
2393 if (lreq->register_gen == req->r_ops[0].watch.gen) {
2394 if (!req->r_result) {
2395 lreq->watch_valid_thru = lreq->ping_sent;
2396 } else if (!lreq->last_error) {
2397 lreq->last_error = normalize_watch_error(req->r_result);
2398 queue_watch_error(lreq);
2399 }
2400 } else {
2401 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
2402 lreq->register_gen, req->r_ops[0].watch.gen);
2403 }
2404
2405 mutex_unlock(&lreq->lock);
2406 linger_put(lreq);
2407}
2408
2409static void send_linger_ping(struct ceph_osd_linger_request *lreq)
2410{
2411 struct ceph_osd_client *osdc = lreq->osdc;
2412 struct ceph_osd_request *req = lreq->ping_req;
2413 struct ceph_osd_req_op *op = &req->r_ops[0];
2414
2415 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2416 dout("%s PAUSERD\n", __func__);
2417 return;
2418 }
2419
2420 lreq->ping_sent = jiffies;
2421 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
2422 __func__, lreq, lreq->linger_id, lreq->ping_sent,
2423 lreq->register_gen);
2424
2425 if (req->r_osd)
2426 cancel_linger_request(req);
2427
2428 request_reinit(req);
2429 target_copy(&req->r_t, &lreq->t);
2430
2431 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2432 op->watch.cookie != lreq->linger_id ||
2433 op->watch.op != CEPH_OSD_WATCH_OP_PING);
2434 op->watch.gen = lreq->register_gen;
2435 req->r_callback = linger_ping_cb;
2436 req->r_priv = linger_get(lreq);
2437 req->r_linger = true;
2438
2439 ceph_osdc_get_request(req);
2440 account_request(req);
2441 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2442 link_request(lreq->osd, req);
2443 send_request(req);
2444}
2445
2446static void linger_submit(struct ceph_osd_linger_request *lreq)
2447{
2448 struct ceph_osd_client *osdc = lreq->osdc;
2449 struct ceph_osd *osd;
2450
2451 calc_target(osdc, &lreq->t, false);
2452 osd = lookup_create_osd(osdc, lreq->t.osd, true);
2453 link_linger(osd, lreq);
2454
2455 send_linger(lreq);
2456}
2457
2458static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
2459{
2460 struct ceph_osd_client *osdc = lreq->osdc;
2461 struct ceph_osd_linger_request *lookup_lreq;
2462
2463 verify_osdc_wrlocked(osdc);
2464
2465 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2466 lreq->linger_id);
2467 if (!lookup_lreq)
2468 return;
2469
2470 WARN_ON(lookup_lreq != lreq);
2471 erase_linger_mc(&osdc->linger_map_checks, lreq);
2472 linger_put(lreq);
2473}
2474
2475/*
2476 * @lreq has to be both registered and linked.
2477 */
2478static void __linger_cancel(struct ceph_osd_linger_request *lreq)
2479{
2480 if (lreq->is_watch && lreq->ping_req->r_osd)
2481 cancel_linger_request(lreq->ping_req);
2482 if (lreq->reg_req->r_osd)
2483 cancel_linger_request(lreq->reg_req);
2484 cancel_linger_map_check(lreq);
2485 unlink_linger(lreq->osd, lreq);
2486 linger_unregister(lreq);
2487}
2488
2489static void linger_cancel(struct ceph_osd_linger_request *lreq)
2490{
2491 struct ceph_osd_client *osdc = lreq->osdc;
2492
2493 down_write(&osdc->lock);
2494 if (__linger_registered(lreq))
2495 __linger_cancel(lreq);
2496 up_write(&osdc->lock);
2497}
2498
2499static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
2500
2501static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
2502{
2503 struct ceph_osd_client *osdc = lreq->osdc;
2504 struct ceph_osdmap *map = osdc->osdmap;
2505
2506 verify_osdc_wrlocked(osdc);
2507 WARN_ON(!map->epoch);
2508
2509 if (lreq->register_gen) {
2510 lreq->map_dne_bound = map->epoch;
2511 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
2512 lreq, lreq->linger_id);
2513 } else {
2514 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
2515 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
2516 map->epoch);
2517 }
2518
2519 if (lreq->map_dne_bound) {
2520 if (map->epoch >= lreq->map_dne_bound) {
2521 /* we had a new enough map */
2522 pr_info("linger_id %llu pool does not exist\n",
2523 lreq->linger_id);
2524 linger_reg_commit_complete(lreq, -ENOENT);
2525 __linger_cancel(lreq);
2526 }
2527 } else {
2528 send_linger_map_check(lreq);
2529 }
2530}
2531
2532static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
2533{
2534 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2535 struct ceph_osd_linger_request *lreq;
2536 u64 linger_id = greq->private_data;
2537
2538 WARN_ON(greq->result || !greq->u.newest);
2539
2540 down_write(&osdc->lock);
2541 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
2542 if (!lreq) {
2543 dout("%s linger_id %llu dne\n", __func__, linger_id);
2544 goto out_unlock;
2545 }
2546
2547 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
2548 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
2549 greq->u.newest);
2550 if (!lreq->map_dne_bound)
2551 lreq->map_dne_bound = greq->u.newest;
2552 erase_linger_mc(&osdc->linger_map_checks, lreq);
2553 check_linger_pool_dne(lreq);
2554
2555 linger_put(lreq);
2556out_unlock:
2557 up_write(&osdc->lock);
2558}
2559
2560static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
2561{
2562 struct ceph_osd_client *osdc = lreq->osdc;
2563 struct ceph_osd_linger_request *lookup_lreq;
2564 int ret;
2565
2566 verify_osdc_wrlocked(osdc);
2567
2568 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
2569 lreq->linger_id);
2570 if (lookup_lreq) {
2571 WARN_ON(lookup_lreq != lreq);
2572 return;
2573 }
2574
2575 linger_get(lreq);
2576 insert_linger_mc(&osdc->linger_map_checks, lreq);
2577 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2578 linger_map_check_cb, lreq->linger_id);
2579 WARN_ON(ret);
2580}
2581
2582static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
2583{
2584 int ret;
2585
2586 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2587 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
2588 return ret ?: lreq->reg_commit_error;
2589}
2590
2591static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
2592{
2593 int ret;
2594
2595 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2596 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
2597 return ret ?: lreq->notify_finish_error;
2598}
2599
2600/*
2601 * Timeout callback, called every N seconds. When 1 or more OSD
2602 * requests has been active for more than N seconds, we send a keepalive
2603 * (tag + timestamp) to its OSD to ensure any communications channel
2604 * reset is detected.
2605 */
2606static void handle_timeout(struct work_struct *work)
2607{
2608 struct ceph_osd_client *osdc =
2609 container_of(work, struct ceph_osd_client, timeout_work.work);
2610 struct ceph_options *opts = osdc->client->options;
2611 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
2612 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
2613 LIST_HEAD(slow_osds);
2614 struct rb_node *n, *p;
2615
2616 dout("%s osdc %p\n", __func__, osdc);
2617 down_write(&osdc->lock);
2618
2619 /*
2620 * ping osds that are a bit slow. this ensures that if there
2621 * is a break in the TCP connection we will notice, and reopen
2622 * a connection with that osd (from the fault callback).
2623 */
2624 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
2625 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
2626 bool found = false;
2627
2628 for (p = rb_first(&osd->o_requests); p; ) {
2629 struct ceph_osd_request *req =
2630 rb_entry(p, struct ceph_osd_request, r_node);
2631
2632 p = rb_next(p); /* abort_request() */
2633
2634 if (time_before(req->r_stamp, cutoff)) {
2635 dout(" req %p tid %llu on osd%d is laggy\n",
2636 req, req->r_tid, osd->o_osd);
2637 found = true;
2638 }
2639 if (opts->osd_request_timeout &&
2640 time_before(req->r_start_stamp, expiry_cutoff)) {
2641 pr_err_ratelimited("tid %llu on osd%d timeout\n",
2642 req->r_tid, osd->o_osd);
2643 abort_request(req, -ETIMEDOUT);
2644 }
2645 }
2646 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
2647 struct ceph_osd_linger_request *lreq =
2648 rb_entry(p, struct ceph_osd_linger_request, node);
2649
2650 dout(" lreq %p linger_id %llu is served by osd%d\n",
2651 lreq, lreq->linger_id, osd->o_osd);
2652 found = true;
2653
2654 mutex_lock(&lreq->lock);
2655 if (lreq->is_watch && lreq->committed && !lreq->last_error)
2656 send_linger_ping(lreq);
2657 mutex_unlock(&lreq->lock);
2658 }
2659
2660 if (found)
2661 list_move_tail(&osd->o_keepalive_item, &slow_osds);
2662 }
2663
2664 if (opts->osd_request_timeout) {
2665 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
2666 struct ceph_osd_request *req =
2667 rb_entry(p, struct ceph_osd_request, r_node);
2668
2669 p = rb_next(p); /* abort_request() */
2670
2671 if (time_before(req->r_start_stamp, expiry_cutoff)) {
2672 pr_err_ratelimited("tid %llu on osd%d timeout\n",
2673 req->r_tid, osdc->homeless_osd.o_osd);
2674 abort_request(req, -ETIMEDOUT);
2675 }
2676 }
2677 }
2678
2679 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
2680 maybe_request_map(osdc);
2681
2682 while (!list_empty(&slow_osds)) {
2683 struct ceph_osd *osd = list_first_entry(&slow_osds,
2684 struct ceph_osd,
2685 o_keepalive_item);
2686 list_del_init(&osd->o_keepalive_item);
2687 ceph_con_keepalive(&osd->o_con);
2688 }
2689
2690 up_write(&osdc->lock);
2691 schedule_delayed_work(&osdc->timeout_work,
2692 osdc->client->options->osd_keepalive_timeout);
2693}
2694
2695static void handle_osds_timeout(struct work_struct *work)
2696{
2697 struct ceph_osd_client *osdc =
2698 container_of(work, struct ceph_osd_client,
2699 osds_timeout_work.work);
2700 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
2701 struct ceph_osd *osd, *nosd;
2702
2703 dout("%s osdc %p\n", __func__, osdc);
2704 down_write(&osdc->lock);
2705 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
2706 if (time_before(jiffies, osd->lru_ttl))
2707 break;
2708
2709 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
2710 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
2711 close_osd(osd);
2712 }
2713
2714 up_write(&osdc->lock);
2715 schedule_delayed_work(&osdc->osds_timeout_work,
2716 round_jiffies_relative(delay));
2717}
2718
2719static int ceph_oloc_decode(void **p, void *end,
2720 struct ceph_object_locator *oloc)
2721{
2722 u8 struct_v, struct_cv;
2723 u32 len;
2724 void *struct_end;
2725 int ret = 0;
2726
2727 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
2728 struct_v = ceph_decode_8(p);
2729 struct_cv = ceph_decode_8(p);
2730 if (struct_v < 3) {
2731 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
2732 struct_v, struct_cv);
2733 goto e_inval;
2734 }
2735 if (struct_cv > 6) {
2736 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
2737 struct_v, struct_cv);
2738 goto e_inval;
2739 }
2740 len = ceph_decode_32(p);
2741 ceph_decode_need(p, end, len, e_inval);
2742 struct_end = *p + len;
2743
2744 oloc->pool = ceph_decode_64(p);
2745 *p += 4; /* skip preferred */
2746
2747 len = ceph_decode_32(p);
2748 if (len > 0) {
2749 pr_warn("ceph_object_locator::key is set\n");
2750 goto e_inval;
2751 }
2752
2753 if (struct_v >= 5) {
2754 bool changed = false;
2755
2756 len = ceph_decode_32(p);
2757 if (len > 0) {
2758 ceph_decode_need(p, end, len, e_inval);
2759 if (!oloc->pool_ns ||
2760 ceph_compare_string(oloc->pool_ns, *p, len))
2761 changed = true;
2762 *p += len;
2763 } else {
2764 if (oloc->pool_ns)
2765 changed = true;
2766 }
2767 if (changed) {
2768 /* redirect changes namespace */
2769 pr_warn("ceph_object_locator::nspace is changed\n");
2770 goto e_inval;
2771 }
2772 }
2773
2774 if (struct_v >= 6) {
2775 s64 hash = ceph_decode_64(p);
2776 if (hash != -1) {
2777 pr_warn("ceph_object_locator::hash is set\n");
2778 goto e_inval;
2779 }
2780 }
2781
2782 /* skip the rest */
2783 *p = struct_end;
2784out:
2785 return ret;
2786
2787e_inval:
2788 ret = -EINVAL;
2789 goto out;
2790}
2791
2792static int ceph_redirect_decode(void **p, void *end,
2793 struct ceph_request_redirect *redir)
2794{
2795 u8 struct_v, struct_cv;
2796 u32 len;
2797 void *struct_end;
2798 int ret;
2799
2800 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
2801 struct_v = ceph_decode_8(p);
2802 struct_cv = ceph_decode_8(p);
2803 if (struct_cv > 1) {
2804 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
2805 struct_v, struct_cv);
2806 goto e_inval;
2807 }
2808 len = ceph_decode_32(p);
2809 ceph_decode_need(p, end, len, e_inval);
2810 struct_end = *p + len;
2811
2812 ret = ceph_oloc_decode(p, end, &redir->oloc);
2813 if (ret)
2814 goto out;
2815
2816 len = ceph_decode_32(p);
2817 if (len > 0) {
2818 pr_warn("ceph_request_redirect::object_name is set\n");
2819 goto e_inval;
2820 }
2821
2822 len = ceph_decode_32(p);
2823 *p += len; /* skip osd_instructions */
2824
2825 /* skip the rest */
2826 *p = struct_end;
2827out:
2828 return ret;
2829
2830e_inval:
2831 ret = -EINVAL;
2832 goto out;
2833}
2834
2835struct MOSDOpReply {
2836 struct ceph_pg pgid;
2837 u64 flags;
2838 int result;
2839 u32 epoch;
2840 int num_ops;
2841 u32 outdata_len[CEPH_OSD_MAX_OPS];
2842 s32 rval[CEPH_OSD_MAX_OPS];
2843 int retry_attempt;
2844 struct ceph_eversion replay_version;
2845 u64 user_version;
2846 struct ceph_request_redirect redirect;
2847};
2848
2849static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
2850{
2851 void *p = msg->front.iov_base;
2852 void *const end = p + msg->front.iov_len;
2853 u16 version = le16_to_cpu(msg->hdr.version);
2854 struct ceph_eversion bad_replay_version;
2855 u8 decode_redir;
2856 u32 len;
2857 int ret;
2858 int i;
2859
2860 ceph_decode_32_safe(&p, end, len, e_inval);
2861 ceph_decode_need(&p, end, len, e_inval);
2862 p += len; /* skip oid */
2863
2864 ret = ceph_decode_pgid(&p, end, &m->pgid);
2865 if (ret)
2866 return ret;
2867
2868 ceph_decode_64_safe(&p, end, m->flags, e_inval);
2869 ceph_decode_32_safe(&p, end, m->result, e_inval);
2870 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
2871 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
2872 p += sizeof(bad_replay_version);
2873 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
2874
2875 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
2876 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
2877 goto e_inval;
2878
2879 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
2880 e_inval);
2881 for (i = 0; i < m->num_ops; i++) {
2882 struct ceph_osd_op *op = p;
2883
2884 m->outdata_len[i] = le32_to_cpu(op->payload_len);
2885 p += sizeof(*op);
2886 }
2887
2888 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
2889 for (i = 0; i < m->num_ops; i++)
2890 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
2891
2892 if (version >= 5) {
2893 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
2894 memcpy(&m->replay_version, p, sizeof(m->replay_version));
2895 p += sizeof(m->replay_version);
2896 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
2897 } else {
2898 m->replay_version = bad_replay_version; /* struct */
2899 m->user_version = le64_to_cpu(m->replay_version.version);
2900 }
2901
2902 if (version >= 6) {
2903 if (version >= 7)
2904 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
2905 else
2906 decode_redir = 1;
2907 } else {
2908 decode_redir = 0;
2909 }
2910
2911 if (decode_redir) {
2912 ret = ceph_redirect_decode(&p, end, &m->redirect);
2913 if (ret)
2914 return ret;
2915 } else {
2916 ceph_oloc_init(&m->redirect.oloc);
2917 }
2918
2919 return 0;
2920
2921e_inval:
2922 return -EINVAL;
2923}
2924
2925/*
2926 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
2927 * specified.
2928 */
2929static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
2930{
2931 struct ceph_osd_client *osdc = osd->o_osdc;
2932 struct ceph_osd_request *req;
2933 struct MOSDOpReply m;
2934 u64 tid = le64_to_cpu(msg->hdr.tid);
2935 u32 data_len = 0;
2936 int ret;
2937 int i;
2938
2939 dout("%s msg %p tid %llu\n", __func__, msg, tid);
2940
2941 down_read(&osdc->lock);
2942 if (!osd_registered(osd)) {
2943 dout("%s osd%d unknown\n", __func__, osd->o_osd);
2944 goto out_unlock_osdc;
2945 }
2946 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
2947
2948 mutex_lock(&osd->lock);
2949 req = lookup_request(&osd->o_requests, tid);
2950 if (!req) {
2951 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
2952 goto out_unlock_session;
2953 }
2954
2955 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
2956 ret = decode_MOSDOpReply(msg, &m);
2957 m.redirect.oloc.pool_ns = NULL;
2958 if (ret) {
2959 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
2960 req->r_tid, ret);
2961 ceph_msg_dump(msg);
2962 goto fail_request;
2963 }
2964 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
2965 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
2966 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
2967 le64_to_cpu(m.replay_version.version), m.user_version);
2968
2969 if (m.retry_attempt >= 0) {
2970 if (m.retry_attempt != req->r_attempts - 1) {
2971 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
2972 req, req->r_tid, m.retry_attempt,
2973 req->r_attempts - 1);
2974 goto out_unlock_session;
2975 }
2976 } else {
2977 WARN_ON(1); /* MOSDOpReply v4 is assumed */
2978 }
2979
2980 if (!ceph_oloc_empty(&m.redirect.oloc)) {
2981 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
2982 m.redirect.oloc.pool);
2983 unlink_request(osd, req);
2984 mutex_unlock(&osd->lock);
2985
2986 /*
2987 * Not ceph_oloc_copy() - changing pool_ns is not
2988 * supported.
2989 */
2990 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
2991 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
2992 req->r_tid = 0;
2993 __submit_request(req, false);
2994 goto out_unlock_osdc;
2995 }
2996
2997 if (m.num_ops != req->r_num_ops) {
2998 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
2999 req->r_num_ops, req->r_tid);
3000 goto fail_request;
3001 }
3002 for (i = 0; i < req->r_num_ops; i++) {
3003 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3004 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3005 req->r_ops[i].rval = m.rval[i];
3006 req->r_ops[i].outdata_len = m.outdata_len[i];
3007 data_len += m.outdata_len[i];
3008 }
3009 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3010 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3011 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3012 goto fail_request;
3013 }
3014 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3015 req, req->r_tid, m.result, data_len);
3016
3017 /*
3018 * Since we only ever request ONDISK, we should only ever get
3019 * one (type of) reply back.
3020 */
3021 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3022 req->r_result = m.result ?: data_len;
3023 finish_request(req);
3024 mutex_unlock(&osd->lock);
3025 up_read(&osdc->lock);
3026
3027 __complete_request(req);
3028 complete_all(&req->r_completion);
3029 ceph_osdc_put_request(req);
3030 return;
3031
3032fail_request:
3033 complete_request(req, -EIO);
3034out_unlock_session:
3035 mutex_unlock(&osd->lock);
3036out_unlock_osdc:
3037 up_read(&osdc->lock);
3038}
3039
3040static void set_pool_was_full(struct ceph_osd_client *osdc)
3041{
3042 struct rb_node *n;
3043
3044 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3045 struct ceph_pg_pool_info *pi =
3046 rb_entry(n, struct ceph_pg_pool_info, node);
3047
3048 pi->was_full = __pool_full(pi);
3049 }
3050}
3051
3052static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
3053{
3054 struct ceph_pg_pool_info *pi;
3055
3056 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3057 if (!pi)
3058 return false;
3059
3060 return pi->was_full && !__pool_full(pi);
3061}
3062
3063static enum calc_target_result
3064recalc_linger_target(struct ceph_osd_linger_request *lreq)
3065{
3066 struct ceph_osd_client *osdc = lreq->osdc;
3067 enum calc_target_result ct_res;
3068
3069 ct_res = calc_target(osdc, &lreq->t, true);
3070 if (ct_res == CALC_TARGET_NEED_RESEND) {
3071 struct ceph_osd *osd;
3072
3073 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3074 if (osd != lreq->osd) {
3075 unlink_linger(lreq->osd, lreq);
3076 link_linger(osd, lreq);
3077 }
3078 }
3079
3080 return ct_res;
3081}
3082
3083/*
3084 * Requeue requests whose mapping to an OSD has changed.
3085 */
3086static void scan_requests(struct ceph_osd *osd,
3087 bool force_resend,
3088 bool cleared_full,
3089 bool check_pool_cleared_full,
3090 struct rb_root *need_resend,
3091 struct list_head *need_resend_linger)
3092{
3093 struct ceph_osd_client *osdc = osd->o_osdc;
3094 struct rb_node *n;
3095 bool force_resend_writes;
3096
3097 for (n = rb_first(&osd->o_linger_requests); n; ) {
3098 struct ceph_osd_linger_request *lreq =
3099 rb_entry(n, struct ceph_osd_linger_request, node);
3100 enum calc_target_result ct_res;
3101
3102 n = rb_next(n); /* recalc_linger_target() */
3103
3104 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3105 lreq->linger_id);
3106 ct_res = recalc_linger_target(lreq);
3107 switch (ct_res) {
3108 case CALC_TARGET_NO_ACTION:
3109 force_resend_writes = cleared_full ||
3110 (check_pool_cleared_full &&
3111 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3112 if (!force_resend && !force_resend_writes)
3113 break;
3114
3115 /* fall through */
3116 case CALC_TARGET_NEED_RESEND:
3117 cancel_linger_map_check(lreq);
3118 /*
3119 * scan_requests() for the previous epoch(s)
3120 * may have already added it to the list, since
3121 * it's not unlinked here.
3122 */
3123 if (list_empty(&lreq->scan_item))
3124 list_add_tail(&lreq->scan_item, need_resend_linger);
3125 break;
3126 case CALC_TARGET_POOL_DNE:
3127 check_linger_pool_dne(lreq);
3128 break;
3129 }
3130 }
3131
3132 for (n = rb_first(&osd->o_requests); n; ) {
3133 struct ceph_osd_request *req =
3134 rb_entry(n, struct ceph_osd_request, r_node);
3135 enum calc_target_result ct_res;
3136
3137 n = rb_next(n); /* unlink_request(), check_pool_dne() */
3138
3139 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3140 ct_res = calc_target(osdc, &req->r_t, false);
3141 switch (ct_res) {
3142 case CALC_TARGET_NO_ACTION:
3143 force_resend_writes = cleared_full ||
3144 (check_pool_cleared_full &&
3145 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3146 if (!force_resend &&
3147 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3148 !force_resend_writes))
3149 break;
3150
3151 /* fall through */
3152 case CALC_TARGET_NEED_RESEND:
3153 cancel_map_check(req);
3154 unlink_request(osd, req);
3155 insert_request(need_resend, req);
3156 break;
3157 case CALC_TARGET_POOL_DNE:
3158 check_pool_dne(req);
3159 break;
3160 }
3161 }
3162}
3163
3164static int handle_one_map(struct ceph_osd_client *osdc,
3165 void *p, void *end, bool incremental,
3166 struct rb_root *need_resend,
3167 struct list_head *need_resend_linger)
3168{
3169 struct ceph_osdmap *newmap;
3170 struct rb_node *n;
3171 bool skipped_map = false;
3172 bool was_full;
3173
3174 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3175 set_pool_was_full(osdc);
3176
3177 if (incremental)
3178 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3179 else
3180 newmap = ceph_osdmap_decode(&p, end);
3181 if (IS_ERR(newmap))
3182 return PTR_ERR(newmap);
3183
3184 if (newmap != osdc->osdmap) {
3185 /*
3186 * Preserve ->was_full before destroying the old map.
3187 * For pools that weren't in the old map, ->was_full
3188 * should be false.
3189 */
3190 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3191 struct ceph_pg_pool_info *pi =
3192 rb_entry(n, struct ceph_pg_pool_info, node);
3193 struct ceph_pg_pool_info *old_pi;
3194
3195 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3196 if (old_pi)
3197 pi->was_full = old_pi->was_full;
3198 else
3199 WARN_ON(pi->was_full);
3200 }
3201
3202 if (osdc->osdmap->epoch &&
3203 osdc->osdmap->epoch + 1 < newmap->epoch) {
3204 WARN_ON(incremental);
3205 skipped_map = true;
3206 }
3207
3208 ceph_osdmap_destroy(osdc->osdmap);
3209 osdc->osdmap = newmap;
3210 }
3211
3212 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3213 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3214 need_resend, need_resend_linger);
3215
3216 for (n = rb_first(&osdc->osds); n; ) {
3217 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3218
3219 n = rb_next(n); /* close_osd() */
3220
3221 scan_requests(osd, skipped_map, was_full, true, need_resend,
3222 need_resend_linger);
3223 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3224 memcmp(&osd->o_con.peer_addr,
3225 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3226 sizeof(struct ceph_entity_addr)))
3227 close_osd(osd);
3228 }
3229
3230 return 0;
3231}
3232
3233static void kick_requests(struct ceph_osd_client *osdc,
3234 struct rb_root *need_resend,
3235 struct list_head *need_resend_linger)
3236{
3237 struct ceph_osd_linger_request *lreq, *nlreq;
3238 struct rb_node *n;
3239
3240 for (n = rb_first(need_resend); n; ) {
3241 struct ceph_osd_request *req =
3242 rb_entry(n, struct ceph_osd_request, r_node);
3243 struct ceph_osd *osd;
3244
3245 n = rb_next(n);
3246 erase_request(need_resend, req); /* before link_request() */
3247
3248 WARN_ON(req->r_osd);
3249 calc_target(osdc, &req->r_t, false);
3250 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3251 link_request(osd, req);
3252 if (!req->r_linger) {
3253 if (!osd_homeless(osd) && !req->r_t.paused)
3254 send_request(req);
3255 } else {
3256 cancel_linger_request(req);
3257 }
3258 }
3259
3260 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3261 if (!osd_homeless(lreq->osd))
3262 send_linger(lreq);
3263
3264 list_del_init(&lreq->scan_item);
3265 }
3266}
3267
3268/*
3269 * Process updated osd map.
3270 *
3271 * The message contains any number of incremental and full maps, normally
3272 * indicating some sort of topology change in the cluster. Kick requests
3273 * off to different OSDs as needed.
3274 */
3275void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3276{
3277 void *p = msg->front.iov_base;
3278 void *const end = p + msg->front.iov_len;
3279 u32 nr_maps, maplen;
3280 u32 epoch;
3281 struct ceph_fsid fsid;
3282 struct rb_root need_resend = RB_ROOT;
3283 LIST_HEAD(need_resend_linger);
3284 bool handled_incremental = false;
3285 bool was_pauserd, was_pausewr;
3286 bool pauserd, pausewr;
3287 int err;
3288
3289 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
3290 down_write(&osdc->lock);
3291
3292 /* verify fsid */
3293 ceph_decode_need(&p, end, sizeof(fsid), bad);
3294 ceph_decode_copy(&p, &fsid, sizeof(fsid));
3295 if (ceph_check_fsid(osdc->client, &fsid) < 0)
3296 goto bad;
3297
3298 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3299 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3300 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
3301 have_pool_full(osdc);
3302
3303 /* incremental maps */
3304 ceph_decode_32_safe(&p, end, nr_maps, bad);
3305 dout(" %d inc maps\n", nr_maps);
3306 while (nr_maps > 0) {
3307 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3308 epoch = ceph_decode_32(&p);
3309 maplen = ceph_decode_32(&p);
3310 ceph_decode_need(&p, end, maplen, bad);
3311 if (osdc->osdmap->epoch &&
3312 osdc->osdmap->epoch + 1 == epoch) {
3313 dout("applying incremental map %u len %d\n",
3314 epoch, maplen);
3315 err = handle_one_map(osdc, p, p + maplen, true,
3316 &need_resend, &need_resend_linger);
3317 if (err)
3318 goto bad;
3319 handled_incremental = true;
3320 } else {
3321 dout("ignoring incremental map %u len %d\n",
3322 epoch, maplen);
3323 }
3324 p += maplen;
3325 nr_maps--;
3326 }
3327 if (handled_incremental)
3328 goto done;
3329
3330 /* full maps */
3331 ceph_decode_32_safe(&p, end, nr_maps, bad);
3332 dout(" %d full maps\n", nr_maps);
3333 while (nr_maps) {
3334 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3335 epoch = ceph_decode_32(&p);
3336 maplen = ceph_decode_32(&p);
3337 ceph_decode_need(&p, end, maplen, bad);
3338 if (nr_maps > 1) {
3339 dout("skipping non-latest full map %u len %d\n",
3340 epoch, maplen);
3341 } else if (osdc->osdmap->epoch >= epoch) {
3342 dout("skipping full map %u len %d, "
3343 "older than our %u\n", epoch, maplen,
3344 osdc->osdmap->epoch);
3345 } else {
3346 dout("taking full map %u len %d\n", epoch, maplen);
3347 err = handle_one_map(osdc, p, p + maplen, false,
3348 &need_resend, &need_resend_linger);
3349 if (err)
3350 goto bad;
3351 }
3352 p += maplen;
3353 nr_maps--;
3354 }
3355
3356done:
3357 /*
3358 * subscribe to subsequent osdmap updates if full to ensure
3359 * we find out when we are no longer full and stop returning
3360 * ENOSPC.
3361 */
3362 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3363 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3364 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
3365 have_pool_full(osdc);
3366 if (was_pauserd || was_pausewr || pauserd || pausewr ||
3367 osdc->osdmap->epoch < osdc->epoch_barrier)
3368 maybe_request_map(osdc);
3369
3370 kick_requests(osdc, &need_resend, &need_resend_linger);
3371
3372 ceph_osdc_abort_on_full(osdc);
3373 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
3374 osdc->osdmap->epoch);
3375 up_write(&osdc->lock);
3376 wake_up_all(&osdc->client->auth_wq);
3377 return;
3378
3379bad:
3380 pr_err("osdc handle_map corrupt msg\n");
3381 ceph_msg_dump(msg);
3382 up_write(&osdc->lock);
3383}
3384
3385/*
3386 * Resubmit requests pending on the given osd.
3387 */
3388static void kick_osd_requests(struct ceph_osd *osd)
3389{
3390 struct rb_node *n;
3391
3392 for (n = rb_first(&osd->o_requests); n; ) {
3393 struct ceph_osd_request *req =
3394 rb_entry(n, struct ceph_osd_request, r_node);
3395
3396 n = rb_next(n); /* cancel_linger_request() */
3397
3398 if (!req->r_linger) {
3399 if (!req->r_t.paused)
3400 send_request(req);
3401 } else {
3402 cancel_linger_request(req);
3403 }
3404 }
3405 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
3406 struct ceph_osd_linger_request *lreq =
3407 rb_entry(n, struct ceph_osd_linger_request, node);
3408
3409 send_linger(lreq);
3410 }
3411}
3412
3413/*
3414 * If the osd connection drops, we need to resubmit all requests.
3415 */
3416static void osd_fault(struct ceph_connection *con)
3417{
3418 struct ceph_osd *osd = con->private;
3419 struct ceph_osd_client *osdc = osd->o_osdc;
3420
3421 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
3422
3423 down_write(&osdc->lock);
3424 if (!osd_registered(osd)) {
3425 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3426 goto out_unlock;
3427 }
3428
3429 if (!reopen_osd(osd))
3430 kick_osd_requests(osd);
3431 maybe_request_map(osdc);
3432
3433out_unlock:
3434 up_write(&osdc->lock);
3435}
3436
3437/*
3438 * Process osd watch notifications
3439 */
3440static void handle_watch_notify(struct ceph_osd_client *osdc,
3441 struct ceph_msg *msg)
3442{
3443 void *p = msg->front.iov_base;
3444 void *const end = p + msg->front.iov_len;
3445 struct ceph_osd_linger_request *lreq;
3446 struct linger_work *lwork;
3447 u8 proto_ver, opcode;
3448 u64 cookie, notify_id;
3449 u64 notifier_id = 0;
3450 s32 return_code = 0;
3451 void *payload = NULL;
3452 u32 payload_len = 0;
3453
3454 ceph_decode_8_safe(&p, end, proto_ver, bad);
3455 ceph_decode_8_safe(&p, end, opcode, bad);
3456 ceph_decode_64_safe(&p, end, cookie, bad);
3457 p += 8; /* skip ver */
3458 ceph_decode_64_safe(&p, end, notify_id, bad);
3459
3460 if (proto_ver >= 1) {
3461 ceph_decode_32_safe(&p, end, payload_len, bad);
3462 ceph_decode_need(&p, end, payload_len, bad);
3463 payload = p;
3464 p += payload_len;
3465 }
3466
3467 if (le16_to_cpu(msg->hdr.version) >= 2)
3468 ceph_decode_32_safe(&p, end, return_code, bad);
3469
3470 if (le16_to_cpu(msg->hdr.version) >= 3)
3471 ceph_decode_64_safe(&p, end, notifier_id, bad);
3472
3473 down_read(&osdc->lock);
3474 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
3475 if (!lreq) {
3476 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
3477 cookie);
3478 goto out_unlock_osdc;
3479 }
3480
3481 mutex_lock(&lreq->lock);
3482 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
3483 opcode, cookie, lreq, lreq->is_watch);
3484 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
3485 if (!lreq->last_error) {
3486 lreq->last_error = -ENOTCONN;
3487 queue_watch_error(lreq);
3488 }
3489 } else if (!lreq->is_watch) {
3490 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
3491 if (lreq->notify_id && lreq->notify_id != notify_id) {
3492 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
3493 lreq->notify_id, notify_id);
3494 } else if (!completion_done(&lreq->notify_finish_wait)) {
3495 struct ceph_msg_data *data =
3496 list_first_entry_or_null(&msg->data,
3497 struct ceph_msg_data,
3498 links);
3499
3500 if (data) {
3501 if (lreq->preply_pages) {
3502 WARN_ON(data->type !=
3503 CEPH_MSG_DATA_PAGES);
3504 *lreq->preply_pages = data->pages;
3505 *lreq->preply_len = data->length;
3506 } else {
3507 ceph_release_page_vector(data->pages,
3508 calc_pages_for(0, data->length));
3509 }
3510 }
3511 lreq->notify_finish_error = return_code;
3512 complete_all(&lreq->notify_finish_wait);
3513 }
3514 } else {
3515 /* CEPH_WATCH_EVENT_NOTIFY */
3516 lwork = lwork_alloc(lreq, do_watch_notify);
3517 if (!lwork) {
3518 pr_err("failed to allocate notify-lwork\n");
3519 goto out_unlock_lreq;
3520 }
3521
3522 lwork->notify.notify_id = notify_id;
3523 lwork->notify.notifier_id = notifier_id;
3524 lwork->notify.payload = payload;
3525 lwork->notify.payload_len = payload_len;
3526 lwork->notify.msg = ceph_msg_get(msg);
3527 lwork_queue(lwork);
3528 }
3529
3530out_unlock_lreq:
3531 mutex_unlock(&lreq->lock);
3532out_unlock_osdc:
3533 up_read(&osdc->lock);
3534 return;
3535
3536bad:
3537 pr_err("osdc handle_watch_notify corrupt msg\n");
3538}
3539
3540/*
3541 * Register request, send initial attempt.
3542 */
3543int ceph_osdc_start_request(struct ceph_osd_client *osdc,
3544 struct ceph_osd_request *req,
3545 bool nofail)
3546{
3547 down_read(&osdc->lock);
3548 submit_request(req, false);
3549 up_read(&osdc->lock);
3550
3551 return 0;
3552}
3553EXPORT_SYMBOL(ceph_osdc_start_request);
3554
3555/*
3556 * Unregister a registered request. The request is not completed:
3557 * ->r_result isn't set and __complete_request() isn't called.
3558 */
3559void ceph_osdc_cancel_request(struct ceph_osd_request *req)
3560{
3561 struct ceph_osd_client *osdc = req->r_osdc;
3562
3563 down_write(&osdc->lock);
3564 if (req->r_osd)
3565 cancel_request(req);
3566 up_write(&osdc->lock);
3567}
3568EXPORT_SYMBOL(ceph_osdc_cancel_request);
3569
3570/*
3571 * @timeout: in jiffies, 0 means "wait forever"
3572 */
3573static int wait_request_timeout(struct ceph_osd_request *req,
3574 unsigned long timeout)
3575{
3576 long left;
3577
3578 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3579 left = wait_for_completion_killable_timeout(&req->r_completion,
3580 ceph_timeout_jiffies(timeout));
3581 if (left <= 0) {
3582 left = left ?: -ETIMEDOUT;
3583 ceph_osdc_cancel_request(req);
3584 } else {
3585 left = req->r_result; /* completed */
3586 }
3587
3588 return left;
3589}
3590
3591/*
3592 * wait for a request to complete
3593 */
3594int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
3595 struct ceph_osd_request *req)
3596{
3597 return wait_request_timeout(req, 0);
3598}
3599EXPORT_SYMBOL(ceph_osdc_wait_request);
3600
3601/*
3602 * sync - wait for all in-flight requests to flush. avoid starvation.
3603 */
3604void ceph_osdc_sync(struct ceph_osd_client *osdc)
3605{
3606 struct rb_node *n, *p;
3607 u64 last_tid = atomic64_read(&osdc->last_tid);
3608
3609again:
3610 down_read(&osdc->lock);
3611 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3612 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3613
3614 mutex_lock(&osd->lock);
3615 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
3616 struct ceph_osd_request *req =
3617 rb_entry(p, struct ceph_osd_request, r_node);
3618
3619 if (req->r_tid > last_tid)
3620 break;
3621
3622 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
3623 continue;
3624
3625 ceph_osdc_get_request(req);
3626 mutex_unlock(&osd->lock);
3627 up_read(&osdc->lock);
3628 dout("%s waiting on req %p tid %llu last_tid %llu\n",
3629 __func__, req, req->r_tid, last_tid);
3630 wait_for_completion(&req->r_completion);
3631 ceph_osdc_put_request(req);
3632 goto again;
3633 }
3634
3635 mutex_unlock(&osd->lock);
3636 }
3637
3638 up_read(&osdc->lock);
3639 dout("%s done last_tid %llu\n", __func__, last_tid);
3640}
3641EXPORT_SYMBOL(ceph_osdc_sync);
3642
3643static struct ceph_osd_request *
3644alloc_linger_request(struct ceph_osd_linger_request *lreq)
3645{
3646 struct ceph_osd_request *req;
3647
3648 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
3649 if (!req)
3650 return NULL;
3651
3652 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3653 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3654
3655 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
3656 ceph_osdc_put_request(req);
3657 return NULL;
3658 }
3659
3660 return req;
3661}
3662
3663/*
3664 * Returns a handle, caller owns a ref.
3665 */
3666struct ceph_osd_linger_request *
3667ceph_osdc_watch(struct ceph_osd_client *osdc,
3668 struct ceph_object_id *oid,
3669 struct ceph_object_locator *oloc,
3670 rados_watchcb2_t wcb,
3671 rados_watcherrcb_t errcb,
3672 void *data)
3673{
3674 struct ceph_osd_linger_request *lreq;
3675 int ret;
3676
3677 lreq = linger_alloc(osdc);
3678 if (!lreq)
3679 return ERR_PTR(-ENOMEM);
3680
3681 lreq->is_watch = true;
3682 lreq->wcb = wcb;
3683 lreq->errcb = errcb;
3684 lreq->data = data;
3685 lreq->watch_valid_thru = jiffies;
3686
3687 ceph_oid_copy(&lreq->t.base_oid, oid);
3688 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
3689 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
3690 ktime_get_real_ts(&lreq->mtime);
3691
3692 lreq->reg_req = alloc_linger_request(lreq);
3693 if (!lreq->reg_req) {
3694 ret = -ENOMEM;
3695 goto err_put_lreq;
3696 }
3697
3698 lreq->ping_req = alloc_linger_request(lreq);
3699 if (!lreq->ping_req) {
3700 ret = -ENOMEM;
3701 goto err_put_lreq;
3702 }
3703
3704 down_write(&osdc->lock);
3705 linger_register(lreq); /* before osd_req_op_* */
3706 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
3707 CEPH_OSD_WATCH_OP_WATCH);
3708 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
3709 CEPH_OSD_WATCH_OP_PING);
3710 linger_submit(lreq);
3711 up_write(&osdc->lock);
3712
3713 ret = linger_reg_commit_wait(lreq);
3714 if (ret) {
3715 linger_cancel(lreq);
3716 goto err_put_lreq;
3717 }
3718
3719 return lreq;
3720
3721err_put_lreq:
3722 linger_put(lreq);
3723 return ERR_PTR(ret);
3724}
3725EXPORT_SYMBOL(ceph_osdc_watch);
3726
3727/*
3728 * Releases a ref.
3729 *
3730 * Times out after mount_timeout to preserve rbd unmap behaviour
3731 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
3732 * with mount_timeout").
3733 */
3734int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
3735 struct ceph_osd_linger_request *lreq)
3736{
3737 struct ceph_options *opts = osdc->client->options;
3738 struct ceph_osd_request *req;
3739 int ret;
3740
3741 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3742 if (!req)
3743 return -ENOMEM;
3744
3745 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3746 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3747 req->r_flags = CEPH_OSD_FLAG_WRITE;
3748 ktime_get_real_ts(&req->r_mtime);
3749 osd_req_op_watch_init(req, 0, lreq->linger_id,
3750 CEPH_OSD_WATCH_OP_UNWATCH);
3751
3752 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3753 if (ret)
3754 goto out_put_req;
3755
3756 ceph_osdc_start_request(osdc, req, false);
3757 linger_cancel(lreq);
3758 linger_put(lreq);
3759 ret = wait_request_timeout(req, opts->mount_timeout);
3760
3761out_put_req:
3762 ceph_osdc_put_request(req);
3763 return ret;
3764}
3765EXPORT_SYMBOL(ceph_osdc_unwatch);
3766
3767static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
3768 u64 notify_id, u64 cookie, void *payload,
3769 size_t payload_len)
3770{
3771 struct ceph_osd_req_op *op;
3772 struct ceph_pagelist *pl;
3773 int ret;
3774
3775 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
3776
3777 pl = kmalloc(sizeof(*pl), GFP_NOIO);
3778 if (!pl)
3779 return -ENOMEM;
3780
3781 ceph_pagelist_init(pl);
3782 ret = ceph_pagelist_encode_64(pl, notify_id);
3783 ret |= ceph_pagelist_encode_64(pl, cookie);
3784 if (payload) {
3785 ret |= ceph_pagelist_encode_32(pl, payload_len);
3786 ret |= ceph_pagelist_append(pl, payload, payload_len);
3787 } else {
3788 ret |= ceph_pagelist_encode_32(pl, 0);
3789 }
3790 if (ret) {
3791 ceph_pagelist_release(pl);
3792 return -ENOMEM;
3793 }
3794
3795 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
3796 op->indata_len = pl->length;
3797 return 0;
3798}
3799
3800int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
3801 struct ceph_object_id *oid,
3802 struct ceph_object_locator *oloc,
3803 u64 notify_id,
3804 u64 cookie,
3805 void *payload,
3806 size_t payload_len)
3807{
3808 struct ceph_osd_request *req;
3809 int ret;
3810
3811 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
3812 if (!req)
3813 return -ENOMEM;
3814
3815 ceph_oid_copy(&req->r_base_oid, oid);
3816 ceph_oloc_copy(&req->r_base_oloc, oloc);
3817 req->r_flags = CEPH_OSD_FLAG_READ;
3818
3819 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3820 if (ret)
3821 goto out_put_req;
3822
3823 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
3824 payload_len);
3825 if (ret)
3826 goto out_put_req;
3827
3828 ceph_osdc_start_request(osdc, req, false);
3829 ret = ceph_osdc_wait_request(osdc, req);
3830
3831out_put_req:
3832 ceph_osdc_put_request(req);
3833 return ret;
3834}
3835EXPORT_SYMBOL(ceph_osdc_notify_ack);
3836
3837static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
3838 u64 cookie, u32 prot_ver, u32 timeout,
3839 void *payload, size_t payload_len)
3840{
3841 struct ceph_osd_req_op *op;
3842 struct ceph_pagelist *pl;
3843 int ret;
3844
3845 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
3846 op->notify.cookie = cookie;
3847
3848 pl = kmalloc(sizeof(*pl), GFP_NOIO);
3849 if (!pl)
3850 return -ENOMEM;
3851
3852 ceph_pagelist_init(pl);
3853 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
3854 ret |= ceph_pagelist_encode_32(pl, timeout);
3855 ret |= ceph_pagelist_encode_32(pl, payload_len);
3856 ret |= ceph_pagelist_append(pl, payload, payload_len);
3857 if (ret) {
3858 ceph_pagelist_release(pl);
3859 return -ENOMEM;
3860 }
3861
3862 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
3863 op->indata_len = pl->length;
3864 return 0;
3865}
3866
3867/*
3868 * @timeout: in seconds
3869 *
3870 * @preply_{pages,len} are initialized both on success and error.
3871 * The caller is responsible for:
3872 *
3873 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
3874 */
3875int ceph_osdc_notify(struct ceph_osd_client *osdc,
3876 struct ceph_object_id *oid,
3877 struct ceph_object_locator *oloc,
3878 void *payload,
3879 size_t payload_len,
3880 u32 timeout,
3881 struct page ***preply_pages,
3882 size_t *preply_len)
3883{
3884 struct ceph_osd_linger_request *lreq;
3885 struct page **pages;
3886 int ret;
3887
3888 WARN_ON(!timeout);
3889 if (preply_pages) {
3890 *preply_pages = NULL;
3891 *preply_len = 0;
3892 }
3893
3894 lreq = linger_alloc(osdc);
3895 if (!lreq)
3896 return -ENOMEM;
3897
3898 lreq->preply_pages = preply_pages;
3899 lreq->preply_len = preply_len;
3900
3901 ceph_oid_copy(&lreq->t.base_oid, oid);
3902 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
3903 lreq->t.flags = CEPH_OSD_FLAG_READ;
3904
3905 lreq->reg_req = alloc_linger_request(lreq);
3906 if (!lreq->reg_req) {
3907 ret = -ENOMEM;
3908 goto out_put_lreq;
3909 }
3910
3911 /* for notify_id */
3912 pages = ceph_alloc_page_vector(1, GFP_NOIO);
3913 if (IS_ERR(pages)) {
3914 ret = PTR_ERR(pages);
3915 goto out_put_lreq;
3916 }
3917
3918 down_write(&osdc->lock);
3919 linger_register(lreq); /* before osd_req_op_* */
3920 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
3921 timeout, payload, payload_len);
3922 if (ret) {
3923 linger_unregister(lreq);
3924 up_write(&osdc->lock);
3925 ceph_release_page_vector(pages, 1);
3926 goto out_put_lreq;
3927 }
3928 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
3929 response_data),
3930 pages, PAGE_SIZE, 0, false, true);
3931 linger_submit(lreq);
3932 up_write(&osdc->lock);
3933
3934 ret = linger_reg_commit_wait(lreq);
3935 if (!ret)
3936 ret = linger_notify_finish_wait(lreq);
3937 else
3938 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
3939
3940 linger_cancel(lreq);
3941out_put_lreq:
3942 linger_put(lreq);
3943 return ret;
3944}
3945EXPORT_SYMBOL(ceph_osdc_notify);
3946
3947/*
3948 * Return the number of milliseconds since the watch was last
3949 * confirmed, or an error. If there is an error, the watch is no
3950 * longer valid, and should be destroyed with ceph_osdc_unwatch().
3951 */
3952int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
3953 struct ceph_osd_linger_request *lreq)
3954{
3955 unsigned long stamp, age;
3956 int ret;
3957
3958 down_read(&osdc->lock);
3959 mutex_lock(&lreq->lock);
3960 stamp = lreq->watch_valid_thru;
3961 if (!list_empty(&lreq->pending_lworks)) {
3962 struct linger_work *lwork =
3963 list_first_entry(&lreq->pending_lworks,
3964 struct linger_work,
3965 pending_item);
3966
3967 if (time_before(lwork->queued_stamp, stamp))
3968 stamp = lwork->queued_stamp;
3969 }
3970 age = jiffies - stamp;
3971 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
3972 lreq, lreq->linger_id, age, lreq->last_error);
3973 /* we are truncating to msecs, so return a safe upper bound */
3974 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
3975
3976 mutex_unlock(&lreq->lock);
3977 up_read(&osdc->lock);
3978 return ret;
3979}
3980
3981static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
3982{
3983 u8 struct_v;
3984 u32 struct_len;
3985 int ret;
3986
3987 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
3988 &struct_v, &struct_len);
3989 if (ret)
3990 return ret;
3991
3992 ceph_decode_copy(p, &item->name, sizeof(item->name));
3993 item->cookie = ceph_decode_64(p);
3994 *p += 4; /* skip timeout_seconds */
3995 if (struct_v >= 2) {
3996 ceph_decode_copy(p, &item->addr, sizeof(item->addr));
3997 ceph_decode_addr(&item->addr);
3998 }
3999
4000 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4001 ENTITY_NAME(item->name), item->cookie,
4002 ceph_pr_addr(&item->addr.in_addr));
4003 return 0;
4004}
4005
4006static int decode_watchers(void **p, void *end,
4007 struct ceph_watch_item **watchers,
4008 u32 *num_watchers)
4009{
4010 u8 struct_v;
4011 u32 struct_len;
4012 int i;
4013 int ret;
4014
4015 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4016 &struct_v, &struct_len);
4017 if (ret)
4018 return ret;
4019
4020 *num_watchers = ceph_decode_32(p);
4021 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4022 if (!*watchers)
4023 return -ENOMEM;
4024
4025 for (i = 0; i < *num_watchers; i++) {
4026 ret = decode_watcher(p, end, *watchers + i);
4027 if (ret) {
4028 kfree(*watchers);
4029 return ret;
4030 }
4031 }
4032
4033 return 0;
4034}
4035
4036/*
4037 * On success, the caller is responsible for:
4038 *
4039 * kfree(watchers);
4040 */
4041int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
4042 struct ceph_object_id *oid,
4043 struct ceph_object_locator *oloc,
4044 struct ceph_watch_item **watchers,
4045 u32 *num_watchers)
4046{
4047 struct ceph_osd_request *req;
4048 struct page **pages;
4049 int ret;
4050
4051 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4052 if (!req)
4053 return -ENOMEM;
4054
4055 ceph_oid_copy(&req->r_base_oid, oid);
4056 ceph_oloc_copy(&req->r_base_oloc, oloc);
4057 req->r_flags = CEPH_OSD_FLAG_READ;
4058
4059 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4060 if (ret)
4061 goto out_put_req;
4062
4063 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4064 if (IS_ERR(pages)) {
4065 ret = PTR_ERR(pages);
4066 goto out_put_req;
4067 }
4068
4069 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
4070 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
4071 response_data),
4072 pages, PAGE_SIZE, 0, false, true);
4073
4074 ceph_osdc_start_request(osdc, req, false);
4075 ret = ceph_osdc_wait_request(osdc, req);
4076 if (ret >= 0) {
4077 void *p = page_address(pages[0]);
4078 void *const end = p + req->r_ops[0].outdata_len;
4079
4080 ret = decode_watchers(&p, end, watchers, num_watchers);
4081 }
4082
4083out_put_req:
4084 ceph_osdc_put_request(req);
4085 return ret;
4086}
4087EXPORT_SYMBOL(ceph_osdc_list_watchers);
4088
4089/*
4090 * Call all pending notify callbacks - for use after a watch is
4091 * unregistered, to make sure no more callbacks for it will be invoked
4092 */
4093void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
4094{
4095 dout("%s osdc %p\n", __func__, osdc);
4096 flush_workqueue(osdc->notify_wq);
4097}
4098EXPORT_SYMBOL(ceph_osdc_flush_notifies);
4099
4100void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
4101{
4102 down_read(&osdc->lock);
4103 maybe_request_map(osdc);
4104 up_read(&osdc->lock);
4105}
4106EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
4107
4108/*
4109 * Execute an OSD class method on an object.
4110 *
4111 * @flags: CEPH_OSD_FLAG_*
4112 * @resp_len: in/out param for reply length
4113 */
4114int ceph_osdc_call(struct ceph_osd_client *osdc,
4115 struct ceph_object_id *oid,
4116 struct ceph_object_locator *oloc,
4117 const char *class, const char *method,
4118 unsigned int flags,
4119 struct page *req_page, size_t req_len,
4120 struct page *resp_page, size_t *resp_len)
4121{
4122 struct ceph_osd_request *req;
4123 int ret;
4124
4125 if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE))
4126 return -E2BIG;
4127
4128 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4129 if (!req)
4130 return -ENOMEM;
4131
4132 ceph_oid_copy(&req->r_base_oid, oid);
4133 ceph_oloc_copy(&req->r_base_oloc, oloc);
4134 req->r_flags = flags;
4135
4136 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4137 if (ret)
4138 goto out_put_req;
4139
4140 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
4141 if (req_page)
4142 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
4143 0, false, false);
4144 if (resp_page)
4145 osd_req_op_cls_response_data_pages(req, 0, &resp_page,
4146 *resp_len, 0, false, false);
4147
4148 ceph_osdc_start_request(osdc, req, false);
4149 ret = ceph_osdc_wait_request(osdc, req);
4150 if (ret >= 0) {
4151 ret = req->r_ops[0].rval;
4152 if (resp_page)
4153 *resp_len = req->r_ops[0].outdata_len;
4154 }
4155
4156out_put_req:
4157 ceph_osdc_put_request(req);
4158 return ret;
4159}
4160EXPORT_SYMBOL(ceph_osdc_call);
4161
4162/*
4163 * init, shutdown
4164 */
4165int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
4166{
4167 int err;
4168
4169 dout("init\n");
4170 osdc->client = client;
4171 init_rwsem(&osdc->lock);
4172 osdc->osds = RB_ROOT;
4173 INIT_LIST_HEAD(&osdc->osd_lru);
4174 spin_lock_init(&osdc->osd_lru_lock);
4175 osd_init(&osdc->homeless_osd);
4176 osdc->homeless_osd.o_osdc = osdc;
4177 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
4178 osdc->last_linger_id = CEPH_LINGER_ID_START;
4179 osdc->linger_requests = RB_ROOT;
4180 osdc->map_checks = RB_ROOT;
4181 osdc->linger_map_checks = RB_ROOT;
4182 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
4183 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
4184
4185 err = -ENOMEM;
4186 osdc->osdmap = ceph_osdmap_alloc();
4187 if (!osdc->osdmap)
4188 goto out;
4189
4190 osdc->req_mempool = mempool_create_slab_pool(10,
4191 ceph_osd_request_cache);
4192 if (!osdc->req_mempool)
4193 goto out_map;
4194
4195 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
4196 PAGE_SIZE, 10, true, "osd_op");
4197 if (err < 0)
4198 goto out_mempool;
4199 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4200 PAGE_SIZE, 10, true, "osd_op_reply");
4201 if (err < 0)
4202 goto out_msgpool;
4203
4204 err = -ENOMEM;
4205 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
4206 if (!osdc->notify_wq)
4207 goto out_msgpool_reply;
4208
4209 schedule_delayed_work(&osdc->timeout_work,
4210 osdc->client->options->osd_keepalive_timeout);
4211 schedule_delayed_work(&osdc->osds_timeout_work,
4212 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
4213
4214 return 0;
4215
4216out_msgpool_reply:
4217 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
4218out_msgpool:
4219 ceph_msgpool_destroy(&osdc->msgpool_op);
4220out_mempool:
4221 mempool_destroy(osdc->req_mempool);
4222out_map:
4223 ceph_osdmap_destroy(osdc->osdmap);
4224out:
4225 return err;
4226}
4227
4228void ceph_osdc_stop(struct ceph_osd_client *osdc)
4229{
4230 flush_workqueue(osdc->notify_wq);
4231 destroy_workqueue(osdc->notify_wq);
4232 cancel_delayed_work_sync(&osdc->timeout_work);
4233 cancel_delayed_work_sync(&osdc->osds_timeout_work);
4234
4235 down_write(&osdc->lock);
4236 while (!RB_EMPTY_ROOT(&osdc->osds)) {
4237 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
4238 struct ceph_osd, o_node);
4239 close_osd(osd);
4240 }
4241 up_write(&osdc->lock);
4242 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
4243 osd_cleanup(&osdc->homeless_osd);
4244
4245 WARN_ON(!list_empty(&osdc->osd_lru));
4246 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
4247 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
4248 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
4249 WARN_ON(atomic_read(&osdc->num_requests));
4250 WARN_ON(atomic_read(&osdc->num_homeless));
4251
4252 ceph_osdmap_destroy(osdc->osdmap);
4253 mempool_destroy(osdc->req_mempool);
4254 ceph_msgpool_destroy(&osdc->msgpool_op);
4255 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
4256}
4257
4258/*
4259 * Read some contiguous pages. If we cross a stripe boundary, shorten
4260 * *plen. Return number of bytes read, or error.
4261 */
4262int ceph_osdc_readpages(struct ceph_osd_client *osdc,
4263 struct ceph_vino vino, struct ceph_file_layout *layout,
4264 u64 off, u64 *plen,
4265 u32 truncate_seq, u64 truncate_size,
4266 struct page **pages, int num_pages, int page_align)
4267{
4268 struct ceph_osd_request *req;
4269 int rc = 0;
4270
4271 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
4272 vino.snap, off, *plen);
4273 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
4274 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
4275 NULL, truncate_seq, truncate_size,
4276 false);
4277 if (IS_ERR(req))
4278 return PTR_ERR(req);
4279
4280 /* it may be a short read due to an object boundary */
4281 osd_req_op_extent_osd_data_pages(req, 0,
4282 pages, *plen, page_align, false, false);
4283
4284 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
4285 off, *plen, *plen, page_align);
4286
4287 rc = ceph_osdc_start_request(osdc, req, false);
4288 if (!rc)
4289 rc = ceph_osdc_wait_request(osdc, req);
4290
4291 ceph_osdc_put_request(req);
4292 dout("readpages result %d\n", rc);
4293 return rc;
4294}
4295EXPORT_SYMBOL(ceph_osdc_readpages);
4296
4297/*
4298 * do a synchronous write on N pages
4299 */
4300int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
4301 struct ceph_file_layout *layout,
4302 struct ceph_snap_context *snapc,
4303 u64 off, u64 len,
4304 u32 truncate_seq, u64 truncate_size,
4305 struct timespec *mtime,
4306 struct page **pages, int num_pages)
4307{
4308 struct ceph_osd_request *req;
4309 int rc = 0;
4310 int page_align = off & ~PAGE_MASK;
4311
4312 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
4313 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
4314 snapc, truncate_seq, truncate_size,
4315 true);
4316 if (IS_ERR(req))
4317 return PTR_ERR(req);
4318
4319 /* it may be a short write due to an object boundary */
4320 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
4321 false, false);
4322 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
4323
4324 req->r_mtime = *mtime;
4325 rc = ceph_osdc_start_request(osdc, req, true);
4326 if (!rc)
4327 rc = ceph_osdc_wait_request(osdc, req);
4328
4329 ceph_osdc_put_request(req);
4330 if (rc == 0)
4331 rc = len;
4332 dout("writepages result %d\n", rc);
4333 return rc;
4334}
4335EXPORT_SYMBOL(ceph_osdc_writepages);
4336
4337int ceph_osdc_setup(void)
4338{
4339 size_t size = sizeof(struct ceph_osd_request) +
4340 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
4341
4342 BUG_ON(ceph_osd_request_cache);
4343 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
4344 0, 0, NULL);
4345
4346 return ceph_osd_request_cache ? 0 : -ENOMEM;
4347}
4348EXPORT_SYMBOL(ceph_osdc_setup);
4349
4350void ceph_osdc_cleanup(void)
4351{
4352 BUG_ON(!ceph_osd_request_cache);
4353 kmem_cache_destroy(ceph_osd_request_cache);
4354 ceph_osd_request_cache = NULL;
4355}
4356EXPORT_SYMBOL(ceph_osdc_cleanup);
4357
4358/*
4359 * handle incoming message
4360 */
4361static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
4362{
4363 struct ceph_osd *osd = con->private;
4364 struct ceph_osd_client *osdc = osd->o_osdc;
4365 int type = le16_to_cpu(msg->hdr.type);
4366
4367 switch (type) {
4368 case CEPH_MSG_OSD_MAP:
4369 ceph_osdc_handle_map(osdc, msg);
4370 break;
4371 case CEPH_MSG_OSD_OPREPLY:
4372 handle_reply(osd, msg);
4373 break;
4374 case CEPH_MSG_WATCH_NOTIFY:
4375 handle_watch_notify(osdc, msg);
4376 break;
4377
4378 default:
4379 pr_err("received unknown message type %d %s\n", type,
4380 ceph_msg_type_name(type));
4381 }
4382
4383 ceph_msg_put(msg);
4384}
4385
4386/*
4387 * Lookup and return message for incoming reply. Don't try to do
4388 * anything about a larger than preallocated data portion of the
4389 * message at the moment - for now, just skip the message.
4390 */
4391static struct ceph_msg *get_reply(struct ceph_connection *con,
4392 struct ceph_msg_header *hdr,
4393 int *skip)
4394{
4395 struct ceph_osd *osd = con->private;
4396 struct ceph_osd_client *osdc = osd->o_osdc;
4397 struct ceph_msg *m = NULL;
4398 struct ceph_osd_request *req;
4399 int front_len = le32_to_cpu(hdr->front_len);
4400 int data_len = le32_to_cpu(hdr->data_len);
4401 u64 tid = le64_to_cpu(hdr->tid);
4402
4403 down_read(&osdc->lock);
4404 if (!osd_registered(osd)) {
4405 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
4406 *skip = 1;
4407 goto out_unlock_osdc;
4408 }
4409 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
4410
4411 mutex_lock(&osd->lock);
4412 req = lookup_request(&osd->o_requests, tid);
4413 if (!req) {
4414 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
4415 osd->o_osd, tid);
4416 *skip = 1;
4417 goto out_unlock_session;
4418 }
4419
4420 ceph_msg_revoke_incoming(req->r_reply);
4421
4422 if (front_len > req->r_reply->front_alloc_len) {
4423 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
4424 __func__, osd->o_osd, req->r_tid, front_len,
4425 req->r_reply->front_alloc_len);
4426 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
4427 false);
4428 if (!m)
4429 goto out_unlock_session;
4430 ceph_msg_put(req->r_reply);
4431 req->r_reply = m;
4432 }
4433
4434 if (data_len > req->r_reply->data_length) {
4435 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
4436 __func__, osd->o_osd, req->r_tid, data_len,
4437 req->r_reply->data_length);
4438 m = NULL;
4439 *skip = 1;
4440 goto out_unlock_session;
4441 }
4442
4443 m = ceph_msg_get(req->r_reply);
4444 dout("get_reply tid %lld %p\n", tid, m);
4445
4446out_unlock_session:
4447 mutex_unlock(&osd->lock);
4448out_unlock_osdc:
4449 up_read(&osdc->lock);
4450 return m;
4451}
4452
4453/*
4454 * TODO: switch to a msg-owned pagelist
4455 */
4456static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
4457{
4458 struct ceph_msg *m;
4459 int type = le16_to_cpu(hdr->type);
4460 u32 front_len = le32_to_cpu(hdr->front_len);
4461 u32 data_len = le32_to_cpu(hdr->data_len);
4462
4463 m = ceph_msg_new(type, front_len, GFP_NOIO, false);
4464 if (!m)
4465 return NULL;
4466
4467 if (data_len) {
4468 struct page **pages;
4469 struct ceph_osd_data osd_data;
4470
4471 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
4472 GFP_NOIO);
4473 if (IS_ERR(pages)) {
4474 ceph_msg_put(m);
4475 return NULL;
4476 }
4477
4478 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
4479 false);
4480 ceph_osdc_msg_data_add(m, &osd_data);
4481 }
4482
4483 return m;
4484}
4485
4486static struct ceph_msg *alloc_msg(struct ceph_connection *con,
4487 struct ceph_msg_header *hdr,
4488 int *skip)
4489{
4490 struct ceph_osd *osd = con->private;
4491 int type = le16_to_cpu(hdr->type);
4492
4493 *skip = 0;
4494 switch (type) {
4495 case CEPH_MSG_OSD_MAP:
4496 case CEPH_MSG_WATCH_NOTIFY:
4497 return alloc_msg_with_page_vector(hdr);
4498 case CEPH_MSG_OSD_OPREPLY:
4499 return get_reply(con, hdr, skip);
4500 default:
4501 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
4502 osd->o_osd, type);
4503 *skip = 1;
4504 return NULL;
4505 }
4506}
4507
4508/*
4509 * Wrappers to refcount containing ceph_osd struct
4510 */
4511static struct ceph_connection *get_osd_con(struct ceph_connection *con)
4512{
4513 struct ceph_osd *osd = con->private;
4514 if (get_osd(osd))
4515 return con;
4516 return NULL;
4517}
4518
4519static void put_osd_con(struct ceph_connection *con)
4520{
4521 struct ceph_osd *osd = con->private;
4522 put_osd(osd);
4523}
4524
4525/*
4526 * authentication
4527 */
4528/*
4529 * Note: returned pointer is the address of a structure that's
4530 * managed separately. Caller must *not* attempt to free it.
4531 */
4532static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
4533 int *proto, int force_new)
4534{
4535 struct ceph_osd *o = con->private;
4536 struct ceph_osd_client *osdc = o->o_osdc;
4537 struct ceph_auth_client *ac = osdc->client->monc.auth;
4538 struct ceph_auth_handshake *auth = &o->o_auth;
4539
4540 if (force_new && auth->authorizer) {
4541 ceph_auth_destroy_authorizer(auth->authorizer);
4542 auth->authorizer = NULL;
4543 }
4544 if (!auth->authorizer) {
4545 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
4546 auth);
4547 if (ret)
4548 return ERR_PTR(ret);
4549 } else {
4550 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
4551 auth);
4552 if (ret)
4553 return ERR_PTR(ret);
4554 }
4555 *proto = ac->protocol;
4556
4557 return auth;
4558}
4559
4560
4561static int verify_authorizer_reply(struct ceph_connection *con)
4562{
4563 struct ceph_osd *o = con->private;
4564 struct ceph_osd_client *osdc = o->o_osdc;
4565 struct ceph_auth_client *ac = osdc->client->monc.auth;
4566
4567 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
4568}
4569
4570static int invalidate_authorizer(struct ceph_connection *con)
4571{
4572 struct ceph_osd *o = con->private;
4573 struct ceph_osd_client *osdc = o->o_osdc;
4574 struct ceph_auth_client *ac = osdc->client->monc.auth;
4575
4576 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
4577 return ceph_monc_validate_auth(&osdc->client->monc);
4578}
4579
4580static int osd_sign_message(struct ceph_msg *msg)
4581{
4582 struct ceph_osd *o = msg->con->private;
4583 struct ceph_auth_handshake *auth = &o->o_auth;
4584
4585 return ceph_auth_sign_message(auth, msg);
4586}
4587
4588static int osd_check_message_signature(struct ceph_msg *msg)
4589{
4590 struct ceph_osd *o = msg->con->private;
4591 struct ceph_auth_handshake *auth = &o->o_auth;
4592
4593 return ceph_auth_check_message_signature(auth, msg);
4594}
4595
4596static const struct ceph_connection_operations osd_con_ops = {
4597 .get = get_osd_con,
4598 .put = put_osd_con,
4599 .dispatch = dispatch,
4600 .get_authorizer = get_authorizer,
4601 .verify_authorizer_reply = verify_authorizer_reply,
4602 .invalidate_authorizer = invalidate_authorizer,
4603 .alloc_msg = alloc_msg,
4604 .sign_message = osd_sign_message,
4605 .check_message_signature = osd_check_message_signature,
4606 .fault = osd_fault,
4607};
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