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