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libceph: protect osdc->osd_lru list with a spinlock
[deliverable/linux.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 static void __send_queued(struct ceph_osd_client *osdc);
29 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
30 static void __register_request(struct ceph_osd_client *osdc,
31 struct ceph_osd_request *req);
32 static void __unregister_request(struct ceph_osd_client *osdc,
33 struct ceph_osd_request *req);
34 static void __unregister_linger_request(struct ceph_osd_client *osdc,
35 struct ceph_osd_request *req);
36 static void __enqueue_request(struct ceph_osd_request *req);
37
38 /*
39 * Implement client access to distributed object storage cluster.
40 *
41 * All data objects are stored within a cluster/cloud of OSDs, or
42 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
43 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
44 * remote daemons serving up and coordinating consistent and safe
45 * access to storage.
46 *
47 * Cluster membership and the mapping of data objects onto storage devices
48 * are described by the osd map.
49 *
50 * We keep track of pending OSD requests (read, write), resubmit
51 * requests to different OSDs when the cluster topology/data layout
52 * change, or retry the affected requests when the communications
53 * channel with an OSD is reset.
54 */
55
56 /*
57 * calculate the mapping of a file extent onto an object, and fill out the
58 * request accordingly. shorten extent as necessary if it crosses an
59 * object boundary.
60 *
61 * fill osd op in request message.
62 */
63 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
64 u64 *objnum, u64 *objoff, u64 *objlen)
65 {
66 u64 orig_len = *plen;
67 int r;
68
69 /* object extent? */
70 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
71 objoff, objlen);
72 if (r < 0)
73 return r;
74 if (*objlen < orig_len) {
75 *plen = *objlen;
76 dout(" skipping last %llu, final file extent %llu~%llu\n",
77 orig_len - *plen, off, *plen);
78 }
79
80 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
81
82 return 0;
83 }
84
85 static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
86 {
87 memset(osd_data, 0, sizeof (*osd_data));
88 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
89 }
90
91 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
92 struct page **pages, u64 length, u32 alignment,
93 bool pages_from_pool, bool own_pages)
94 {
95 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
96 osd_data->pages = pages;
97 osd_data->length = length;
98 osd_data->alignment = alignment;
99 osd_data->pages_from_pool = pages_from_pool;
100 osd_data->own_pages = own_pages;
101 }
102
103 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
104 struct ceph_pagelist *pagelist)
105 {
106 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
107 osd_data->pagelist = pagelist;
108 }
109
110 #ifdef CONFIG_BLOCK
111 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
112 struct bio *bio, size_t bio_length)
113 {
114 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
115 osd_data->bio = bio;
116 osd_data->bio_length = bio_length;
117 }
118 #endif /* CONFIG_BLOCK */
119
120 #define osd_req_op_data(oreq, whch, typ, fld) \
121 ({ \
122 struct ceph_osd_request *__oreq = (oreq); \
123 unsigned int __whch = (whch); \
124 BUG_ON(__whch >= __oreq->r_num_ops); \
125 &__oreq->r_ops[__whch].typ.fld; \
126 })
127
128 static struct ceph_osd_data *
129 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
130 {
131 BUG_ON(which >= osd_req->r_num_ops);
132
133 return &osd_req->r_ops[which].raw_data_in;
134 }
135
136 struct ceph_osd_data *
137 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
138 unsigned int which)
139 {
140 return osd_req_op_data(osd_req, which, extent, osd_data);
141 }
142 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
143
144 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
145 unsigned int which, struct page **pages,
146 u64 length, u32 alignment,
147 bool pages_from_pool, bool own_pages)
148 {
149 struct ceph_osd_data *osd_data;
150
151 osd_data = osd_req_op_raw_data_in(osd_req, which);
152 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
153 pages_from_pool, own_pages);
154 }
155 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
156
157 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
158 unsigned int which, struct page **pages,
159 u64 length, u32 alignment,
160 bool pages_from_pool, bool own_pages)
161 {
162 struct ceph_osd_data *osd_data;
163
164 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
165 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
166 pages_from_pool, own_pages);
167 }
168 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
169
170 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
171 unsigned int which, struct ceph_pagelist *pagelist)
172 {
173 struct ceph_osd_data *osd_data;
174
175 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
176 ceph_osd_data_pagelist_init(osd_data, pagelist);
177 }
178 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
179
180 #ifdef CONFIG_BLOCK
181 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
182 unsigned int which, struct bio *bio, size_t bio_length)
183 {
184 struct ceph_osd_data *osd_data;
185
186 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
187 ceph_osd_data_bio_init(osd_data, bio, bio_length);
188 }
189 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
190 #endif /* CONFIG_BLOCK */
191
192 static void osd_req_op_cls_request_info_pagelist(
193 struct ceph_osd_request *osd_req,
194 unsigned int which, struct ceph_pagelist *pagelist)
195 {
196 struct ceph_osd_data *osd_data;
197
198 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
199 ceph_osd_data_pagelist_init(osd_data, pagelist);
200 }
201
202 void osd_req_op_cls_request_data_pagelist(
203 struct ceph_osd_request *osd_req,
204 unsigned int which, struct ceph_pagelist *pagelist)
205 {
206 struct ceph_osd_data *osd_data;
207
208 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
209 ceph_osd_data_pagelist_init(osd_data, pagelist);
210 osd_req->r_ops[which].cls.indata_len += pagelist->length;
211 osd_req->r_ops[which].indata_len += pagelist->length;
212 }
213 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
214
215 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
216 unsigned int which, struct page **pages, u64 length,
217 u32 alignment, bool pages_from_pool, bool own_pages)
218 {
219 struct ceph_osd_data *osd_data;
220
221 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
222 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
223 pages_from_pool, own_pages);
224 osd_req->r_ops[which].cls.indata_len += length;
225 osd_req->r_ops[which].indata_len += length;
226 }
227 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
228
229 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
230 unsigned int which, struct page **pages, u64 length,
231 u32 alignment, bool pages_from_pool, bool own_pages)
232 {
233 struct ceph_osd_data *osd_data;
234
235 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
236 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
237 pages_from_pool, own_pages);
238 }
239 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
240
241 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
242 {
243 switch (osd_data->type) {
244 case CEPH_OSD_DATA_TYPE_NONE:
245 return 0;
246 case CEPH_OSD_DATA_TYPE_PAGES:
247 return osd_data->length;
248 case CEPH_OSD_DATA_TYPE_PAGELIST:
249 return (u64)osd_data->pagelist->length;
250 #ifdef CONFIG_BLOCK
251 case CEPH_OSD_DATA_TYPE_BIO:
252 return (u64)osd_data->bio_length;
253 #endif /* CONFIG_BLOCK */
254 default:
255 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
256 return 0;
257 }
258 }
259
260 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
261 {
262 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
263 int num_pages;
264
265 num_pages = calc_pages_for((u64)osd_data->alignment,
266 (u64)osd_data->length);
267 ceph_release_page_vector(osd_data->pages, num_pages);
268 }
269 ceph_osd_data_init(osd_data);
270 }
271
272 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
273 unsigned int which)
274 {
275 struct ceph_osd_req_op *op;
276
277 BUG_ON(which >= osd_req->r_num_ops);
278 op = &osd_req->r_ops[which];
279
280 switch (op->op) {
281 case CEPH_OSD_OP_READ:
282 case CEPH_OSD_OP_WRITE:
283 case CEPH_OSD_OP_WRITEFULL:
284 ceph_osd_data_release(&op->extent.osd_data);
285 break;
286 case CEPH_OSD_OP_CALL:
287 ceph_osd_data_release(&op->cls.request_info);
288 ceph_osd_data_release(&op->cls.request_data);
289 ceph_osd_data_release(&op->cls.response_data);
290 break;
291 case CEPH_OSD_OP_SETXATTR:
292 case CEPH_OSD_OP_CMPXATTR:
293 ceph_osd_data_release(&op->xattr.osd_data);
294 break;
295 case CEPH_OSD_OP_STAT:
296 ceph_osd_data_release(&op->raw_data_in);
297 break;
298 default:
299 break;
300 }
301 }
302
303 /*
304 * Assumes @t is zero-initialized.
305 */
306 static void target_init(struct ceph_osd_request_target *t)
307 {
308 ceph_oid_init(&t->base_oid);
309 ceph_oloc_init(&t->base_oloc);
310 ceph_oid_init(&t->target_oid);
311 ceph_oloc_init(&t->target_oloc);
312
313 ceph_osds_init(&t->acting);
314 ceph_osds_init(&t->up);
315 t->size = -1;
316 t->min_size = -1;
317
318 t->osd = CEPH_HOMELESS_OSD;
319 }
320
321 static void target_destroy(struct ceph_osd_request_target *t)
322 {
323 ceph_oid_destroy(&t->base_oid);
324 ceph_oid_destroy(&t->target_oid);
325 }
326
327 /*
328 * requests
329 */
330 static void ceph_osdc_release_request(struct kref *kref)
331 {
332 struct ceph_osd_request *req = container_of(kref,
333 struct ceph_osd_request, r_kref);
334 unsigned int which;
335
336 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
337 req->r_request, req->r_reply);
338 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
339 WARN_ON(!list_empty(&req->r_req_lru_item));
340 WARN_ON(!list_empty(&req->r_osd_item));
341 WARN_ON(!list_empty(&req->r_linger_item));
342 WARN_ON(!list_empty(&req->r_linger_osd_item));
343 WARN_ON(req->r_osd);
344
345 if (req->r_request)
346 ceph_msg_put(req->r_request);
347 if (req->r_reply) {
348 ceph_msg_revoke_incoming(req->r_reply);
349 ceph_msg_put(req->r_reply);
350 }
351
352 for (which = 0; which < req->r_num_ops; which++)
353 osd_req_op_data_release(req, which);
354
355 target_destroy(&req->r_t);
356 ceph_put_snap_context(req->r_snapc);
357
358 if (req->r_mempool)
359 mempool_free(req, req->r_osdc->req_mempool);
360 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
361 kmem_cache_free(ceph_osd_request_cache, req);
362 else
363 kfree(req);
364 }
365
366 void ceph_osdc_get_request(struct ceph_osd_request *req)
367 {
368 dout("%s %p (was %d)\n", __func__, req,
369 atomic_read(&req->r_kref.refcount));
370 kref_get(&req->r_kref);
371 }
372 EXPORT_SYMBOL(ceph_osdc_get_request);
373
374 void ceph_osdc_put_request(struct ceph_osd_request *req)
375 {
376 if (req) {
377 dout("%s %p (was %d)\n", __func__, req,
378 atomic_read(&req->r_kref.refcount));
379 kref_put(&req->r_kref, ceph_osdc_release_request);
380 }
381 }
382 EXPORT_SYMBOL(ceph_osdc_put_request);
383
384 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
385 struct ceph_snap_context *snapc,
386 unsigned int num_ops,
387 bool use_mempool,
388 gfp_t gfp_flags)
389 {
390 struct ceph_osd_request *req;
391
392 if (use_mempool) {
393 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
394 req = mempool_alloc(osdc->req_mempool, gfp_flags);
395 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
396 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
397 } else {
398 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
399 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
400 gfp_flags);
401 }
402 if (unlikely(!req))
403 return NULL;
404
405 /* req only, each op is zeroed in _osd_req_op_init() */
406 memset(req, 0, sizeof(*req));
407
408 req->r_osdc = osdc;
409 req->r_mempool = use_mempool;
410 req->r_num_ops = num_ops;
411 req->r_snapid = CEPH_NOSNAP;
412 req->r_snapc = ceph_get_snap_context(snapc);
413
414 kref_init(&req->r_kref);
415 init_completion(&req->r_completion);
416 init_completion(&req->r_safe_completion);
417 RB_CLEAR_NODE(&req->r_node);
418 INIT_LIST_HEAD(&req->r_unsafe_item);
419 INIT_LIST_HEAD(&req->r_linger_item);
420 INIT_LIST_HEAD(&req->r_linger_osd_item);
421 INIT_LIST_HEAD(&req->r_req_lru_item);
422 INIT_LIST_HEAD(&req->r_osd_item);
423
424 target_init(&req->r_t);
425
426 dout("%s req %p\n", __func__, req);
427 return req;
428 }
429 EXPORT_SYMBOL(ceph_osdc_alloc_request);
430
431 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
432 {
433 struct ceph_osd_client *osdc = req->r_osdc;
434 struct ceph_msg *msg;
435 int msg_size;
436
437 WARN_ON(ceph_oid_empty(&req->r_base_oid));
438
439 /* create request message */
440 msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
441 msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
442 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
443 msg_size += 1 + 8 + 4 + 4; /* pgid */
444 msg_size += 4 + req->r_base_oid.name_len; /* oid */
445 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
446 msg_size += 8; /* snapid */
447 msg_size += 8; /* snap_seq */
448 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
449 msg_size += 4; /* retry_attempt */
450
451 if (req->r_mempool)
452 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
453 else
454 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
455 if (!msg)
456 return -ENOMEM;
457
458 memset(msg->front.iov_base, 0, msg->front.iov_len);
459 req->r_request = msg;
460
461 /* create reply message */
462 msg_size = OSD_OPREPLY_FRONT_LEN;
463 msg_size += req->r_base_oid.name_len;
464 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
465
466 if (req->r_mempool)
467 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
468 else
469 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
470 if (!msg)
471 return -ENOMEM;
472
473 req->r_reply = msg;
474
475 return 0;
476 }
477 EXPORT_SYMBOL(ceph_osdc_alloc_messages);
478
479 static bool osd_req_opcode_valid(u16 opcode)
480 {
481 switch (opcode) {
482 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
483 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
484 #undef GENERATE_CASE
485 default:
486 return false;
487 }
488 }
489
490 /*
491 * This is an osd op init function for opcodes that have no data or
492 * other information associated with them. It also serves as a
493 * common init routine for all the other init functions, below.
494 */
495 static struct ceph_osd_req_op *
496 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
497 u16 opcode, u32 flags)
498 {
499 struct ceph_osd_req_op *op;
500
501 BUG_ON(which >= osd_req->r_num_ops);
502 BUG_ON(!osd_req_opcode_valid(opcode));
503
504 op = &osd_req->r_ops[which];
505 memset(op, 0, sizeof (*op));
506 op->op = opcode;
507 op->flags = flags;
508
509 return op;
510 }
511
512 void osd_req_op_init(struct ceph_osd_request *osd_req,
513 unsigned int which, u16 opcode, u32 flags)
514 {
515 (void)_osd_req_op_init(osd_req, which, opcode, flags);
516 }
517 EXPORT_SYMBOL(osd_req_op_init);
518
519 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
520 unsigned int which, u16 opcode,
521 u64 offset, u64 length,
522 u64 truncate_size, u32 truncate_seq)
523 {
524 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
525 opcode, 0);
526 size_t payload_len = 0;
527
528 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
529 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
530 opcode != CEPH_OSD_OP_TRUNCATE);
531
532 op->extent.offset = offset;
533 op->extent.length = length;
534 op->extent.truncate_size = truncate_size;
535 op->extent.truncate_seq = truncate_seq;
536 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
537 payload_len += length;
538
539 op->indata_len = payload_len;
540 }
541 EXPORT_SYMBOL(osd_req_op_extent_init);
542
543 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
544 unsigned int which, u64 length)
545 {
546 struct ceph_osd_req_op *op;
547 u64 previous;
548
549 BUG_ON(which >= osd_req->r_num_ops);
550 op = &osd_req->r_ops[which];
551 previous = op->extent.length;
552
553 if (length == previous)
554 return; /* Nothing to do */
555 BUG_ON(length > previous);
556
557 op->extent.length = length;
558 op->indata_len -= previous - length;
559 }
560 EXPORT_SYMBOL(osd_req_op_extent_update);
561
562 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
563 unsigned int which, u64 offset_inc)
564 {
565 struct ceph_osd_req_op *op, *prev_op;
566
567 BUG_ON(which + 1 >= osd_req->r_num_ops);
568
569 prev_op = &osd_req->r_ops[which];
570 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
571 /* dup previous one */
572 op->indata_len = prev_op->indata_len;
573 op->outdata_len = prev_op->outdata_len;
574 op->extent = prev_op->extent;
575 /* adjust offset */
576 op->extent.offset += offset_inc;
577 op->extent.length -= offset_inc;
578
579 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
580 op->indata_len -= offset_inc;
581 }
582 EXPORT_SYMBOL(osd_req_op_extent_dup_last);
583
584 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
585 u16 opcode, const char *class, const char *method)
586 {
587 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
588 opcode, 0);
589 struct ceph_pagelist *pagelist;
590 size_t payload_len = 0;
591 size_t size;
592
593 BUG_ON(opcode != CEPH_OSD_OP_CALL);
594
595 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
596 BUG_ON(!pagelist);
597 ceph_pagelist_init(pagelist);
598
599 op->cls.class_name = class;
600 size = strlen(class);
601 BUG_ON(size > (size_t) U8_MAX);
602 op->cls.class_len = size;
603 ceph_pagelist_append(pagelist, class, size);
604 payload_len += size;
605
606 op->cls.method_name = method;
607 size = strlen(method);
608 BUG_ON(size > (size_t) U8_MAX);
609 op->cls.method_len = size;
610 ceph_pagelist_append(pagelist, method, size);
611 payload_len += size;
612
613 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
614
615 op->indata_len = payload_len;
616 }
617 EXPORT_SYMBOL(osd_req_op_cls_init);
618
619 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
620 u16 opcode, const char *name, const void *value,
621 size_t size, u8 cmp_op, u8 cmp_mode)
622 {
623 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
624 opcode, 0);
625 struct ceph_pagelist *pagelist;
626 size_t payload_len;
627
628 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
629
630 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
631 if (!pagelist)
632 return -ENOMEM;
633
634 ceph_pagelist_init(pagelist);
635
636 payload_len = strlen(name);
637 op->xattr.name_len = payload_len;
638 ceph_pagelist_append(pagelist, name, payload_len);
639
640 op->xattr.value_len = size;
641 ceph_pagelist_append(pagelist, value, size);
642 payload_len += size;
643
644 op->xattr.cmp_op = cmp_op;
645 op->xattr.cmp_mode = cmp_mode;
646
647 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
648 op->indata_len = payload_len;
649 return 0;
650 }
651 EXPORT_SYMBOL(osd_req_op_xattr_init);
652
653 void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
654 unsigned int which, u16 opcode,
655 u64 cookie, u64 version, int flag)
656 {
657 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
658 opcode, 0);
659
660 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
661
662 op->watch.cookie = cookie;
663 op->watch.ver = version;
664 if (opcode == CEPH_OSD_OP_WATCH && flag)
665 op->watch.flag = (u8)1;
666 }
667 EXPORT_SYMBOL(osd_req_op_watch_init);
668
669 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
670 unsigned int which,
671 u64 expected_object_size,
672 u64 expected_write_size)
673 {
674 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
675 CEPH_OSD_OP_SETALLOCHINT,
676 0);
677
678 op->alloc_hint.expected_object_size = expected_object_size;
679 op->alloc_hint.expected_write_size = expected_write_size;
680
681 /*
682 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
683 * not worth a feature bit. Set FAILOK per-op flag to make
684 * sure older osds don't trip over an unsupported opcode.
685 */
686 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
687 }
688 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
689
690 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
691 struct ceph_osd_data *osd_data)
692 {
693 u64 length = ceph_osd_data_length(osd_data);
694
695 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
696 BUG_ON(length > (u64) SIZE_MAX);
697 if (length)
698 ceph_msg_data_add_pages(msg, osd_data->pages,
699 length, osd_data->alignment);
700 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
701 BUG_ON(!length);
702 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
703 #ifdef CONFIG_BLOCK
704 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
705 ceph_msg_data_add_bio(msg, osd_data->bio, length);
706 #endif
707 } else {
708 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
709 }
710 }
711
712 static u32 osd_req_encode_op(struct ceph_osd_op *dst,
713 const struct ceph_osd_req_op *src)
714 {
715 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
716 pr_err("unrecognized osd opcode %d\n", src->op);
717
718 return 0;
719 }
720
721 switch (src->op) {
722 case CEPH_OSD_OP_STAT:
723 break;
724 case CEPH_OSD_OP_READ:
725 case CEPH_OSD_OP_WRITE:
726 case CEPH_OSD_OP_WRITEFULL:
727 case CEPH_OSD_OP_ZERO:
728 case CEPH_OSD_OP_TRUNCATE:
729 dst->extent.offset = cpu_to_le64(src->extent.offset);
730 dst->extent.length = cpu_to_le64(src->extent.length);
731 dst->extent.truncate_size =
732 cpu_to_le64(src->extent.truncate_size);
733 dst->extent.truncate_seq =
734 cpu_to_le32(src->extent.truncate_seq);
735 break;
736 case CEPH_OSD_OP_CALL:
737 dst->cls.class_len = src->cls.class_len;
738 dst->cls.method_len = src->cls.method_len;
739 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
740 break;
741 case CEPH_OSD_OP_STARTSYNC:
742 break;
743 case CEPH_OSD_OP_NOTIFY_ACK:
744 case CEPH_OSD_OP_WATCH:
745 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
746 dst->watch.ver = cpu_to_le64(src->watch.ver);
747 dst->watch.flag = src->watch.flag;
748 break;
749 case CEPH_OSD_OP_SETALLOCHINT:
750 dst->alloc_hint.expected_object_size =
751 cpu_to_le64(src->alloc_hint.expected_object_size);
752 dst->alloc_hint.expected_write_size =
753 cpu_to_le64(src->alloc_hint.expected_write_size);
754 break;
755 case CEPH_OSD_OP_SETXATTR:
756 case CEPH_OSD_OP_CMPXATTR:
757 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
758 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
759 dst->xattr.cmp_op = src->xattr.cmp_op;
760 dst->xattr.cmp_mode = src->xattr.cmp_mode;
761 break;
762 case CEPH_OSD_OP_CREATE:
763 case CEPH_OSD_OP_DELETE:
764 break;
765 default:
766 pr_err("unsupported osd opcode %s\n",
767 ceph_osd_op_name(src->op));
768 WARN_ON(1);
769
770 return 0;
771 }
772
773 dst->op = cpu_to_le16(src->op);
774 dst->flags = cpu_to_le32(src->flags);
775 dst->payload_len = cpu_to_le32(src->indata_len);
776
777 return src->indata_len;
778 }
779
780 /*
781 * build new request AND message, calculate layout, and adjust file
782 * extent as needed.
783 *
784 * if the file was recently truncated, we include information about its
785 * old and new size so that the object can be updated appropriately. (we
786 * avoid synchronously deleting truncated objects because it's slow.)
787 *
788 * if @do_sync, include a 'startsync' command so that the osd will flush
789 * data quickly.
790 */
791 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
792 struct ceph_file_layout *layout,
793 struct ceph_vino vino,
794 u64 off, u64 *plen,
795 unsigned int which, int num_ops,
796 int opcode, int flags,
797 struct ceph_snap_context *snapc,
798 u32 truncate_seq,
799 u64 truncate_size,
800 bool use_mempool)
801 {
802 struct ceph_osd_request *req;
803 u64 objnum = 0;
804 u64 objoff = 0;
805 u64 objlen = 0;
806 int r;
807
808 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
809 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
810 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
811
812 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
813 GFP_NOFS);
814 if (!req) {
815 r = -ENOMEM;
816 goto fail;
817 }
818
819 /* calculate max write size */
820 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
821 if (r)
822 goto fail;
823
824 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
825 osd_req_op_init(req, which, opcode, 0);
826 } else {
827 u32 object_size = le32_to_cpu(layout->fl_object_size);
828 u32 object_base = off - objoff;
829 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
830 if (truncate_size <= object_base) {
831 truncate_size = 0;
832 } else {
833 truncate_size -= object_base;
834 if (truncate_size > object_size)
835 truncate_size = object_size;
836 }
837 }
838 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
839 truncate_size, truncate_seq);
840 }
841
842 req->r_flags = flags;
843 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
844 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
845
846 req->r_snapid = vino.snap;
847 if (flags & CEPH_OSD_FLAG_WRITE)
848 req->r_data_offset = off;
849
850 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
851 if (r)
852 goto fail;
853
854 return req;
855
856 fail:
857 ceph_osdc_put_request(req);
858 return ERR_PTR(r);
859 }
860 EXPORT_SYMBOL(ceph_osdc_new_request);
861
862 /*
863 * We keep osd requests in an rbtree, sorted by ->r_tid.
864 */
865 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
866
867 static bool osd_homeless(struct ceph_osd *osd)
868 {
869 return osd->o_osd == CEPH_HOMELESS_OSD;
870 }
871
872 static struct ceph_osd_request *
873 __lookup_request_ge(struct ceph_osd_client *osdc,
874 u64 tid)
875 {
876 struct ceph_osd_request *req;
877 struct rb_node *n = osdc->requests.rb_node;
878
879 while (n) {
880 req = rb_entry(n, struct ceph_osd_request, r_node);
881 if (tid < req->r_tid) {
882 if (!n->rb_left)
883 return req;
884 n = n->rb_left;
885 } else if (tid > req->r_tid) {
886 n = n->rb_right;
887 } else {
888 return req;
889 }
890 }
891 return NULL;
892 }
893
894 static void __kick_linger_request(struct ceph_osd_request *req)
895 {
896 struct ceph_osd_client *osdc = req->r_osdc;
897 struct ceph_osd *osd = req->r_osd;
898
899 /*
900 * Linger requests need to be resent with a new tid to avoid
901 * the dup op detection logic on the OSDs. Achieve this with
902 * a re-register dance instead of open-coding.
903 */
904 ceph_osdc_get_request(req);
905 if (!list_empty(&req->r_linger_item))
906 __unregister_linger_request(osdc, req);
907 else
908 __unregister_request(osdc, req);
909 __register_request(osdc, req);
910 ceph_osdc_put_request(req);
911
912 /*
913 * Unless request has been registered as both normal and
914 * lingering, __unregister{,_linger}_request clears r_osd.
915 * However, here we need to preserve r_osd to make sure we
916 * requeue on the same OSD.
917 */
918 WARN_ON(req->r_osd || !osd);
919 req->r_osd = osd;
920
921 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
922 __enqueue_request(req);
923 }
924
925 /*
926 * Resubmit requests pending on the given osd.
927 */
928 static void __kick_osd_requests(struct ceph_osd_client *osdc,
929 struct ceph_osd *osd)
930 {
931 struct ceph_osd_request *req, *nreq;
932 LIST_HEAD(resend);
933 LIST_HEAD(resend_linger);
934 int err;
935
936 dout("%s osd%d\n", __func__, osd->o_osd);
937 err = __reset_osd(osdc, osd);
938 if (err)
939 return;
940
941 /*
942 * Build up a list of requests to resend by traversing the
943 * osd's list of requests. Requests for a given object are
944 * sent in tid order, and that is also the order they're
945 * kept on this list. Therefore all requests that are in
946 * flight will be found first, followed by all requests that
947 * have not yet been sent. And to resend requests while
948 * preserving this order we will want to put any sent
949 * requests back on the front of the osd client's unsent
950 * list.
951 *
952 * So we build a separate ordered list of already-sent
953 * requests for the affected osd and splice it onto the
954 * front of the osd client's unsent list. Once we've seen a
955 * request that has not yet been sent we're done. Those
956 * requests are already sitting right where they belong.
957 */
958 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
959 if (!req->r_sent)
960 break;
961
962 if (!req->r_linger) {
963 dout("%s requeueing %p tid %llu\n", __func__, req,
964 req->r_tid);
965 list_move_tail(&req->r_req_lru_item, &resend);
966 req->r_flags |= CEPH_OSD_FLAG_RETRY;
967 } else {
968 list_move_tail(&req->r_req_lru_item, &resend_linger);
969 }
970 }
971 list_splice(&resend, &osdc->req_unsent);
972
973 /*
974 * Both registered and not yet registered linger requests are
975 * enqueued with a new tid on the same OSD. We add/move them
976 * to req_unsent/o_requests at the end to keep things in tid
977 * order.
978 */
979 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
980 r_linger_osd_item) {
981 WARN_ON(!list_empty(&req->r_req_lru_item));
982 __kick_linger_request(req);
983 }
984
985 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
986 __kick_linger_request(req);
987 }
988
989 /*
990 * If the osd connection drops, we need to resubmit all requests.
991 */
992 static void osd_reset(struct ceph_connection *con)
993 {
994 struct ceph_osd *osd = con->private;
995 struct ceph_osd_client *osdc;
996
997 if (!osd)
998 return;
999 dout("osd_reset osd%d\n", osd->o_osd);
1000 osdc = osd->o_osdc;
1001 down_read(&osdc->map_sem);
1002 mutex_lock(&osdc->request_mutex);
1003 __kick_osd_requests(osdc, osd);
1004 __send_queued(osdc);
1005 mutex_unlock(&osdc->request_mutex);
1006 up_read(&osdc->map_sem);
1007 }
1008
1009 /*
1010 * Assumes @osd is zero-initialized.
1011 */
1012 static void osd_init(struct ceph_osd *osd)
1013 {
1014 atomic_set(&osd->o_ref, 1);
1015 RB_CLEAR_NODE(&osd->o_node);
1016 INIT_LIST_HEAD(&osd->o_requests);
1017 INIT_LIST_HEAD(&osd->o_linger_requests);
1018 INIT_LIST_HEAD(&osd->o_osd_lru);
1019 INIT_LIST_HEAD(&osd->o_keepalive_item);
1020 osd->o_incarnation = 1;
1021 }
1022
1023 static void osd_cleanup(struct ceph_osd *osd)
1024 {
1025 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1026 WARN_ON(!list_empty(&osd->o_requests));
1027 WARN_ON(!list_empty(&osd->o_linger_requests));
1028 WARN_ON(!list_empty(&osd->o_osd_lru));
1029 WARN_ON(!list_empty(&osd->o_keepalive_item));
1030
1031 if (osd->o_auth.authorizer) {
1032 WARN_ON(osd_homeless(osd));
1033 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1034 }
1035 }
1036
1037 /*
1038 * Track open sessions with osds.
1039 */
1040 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1041 {
1042 struct ceph_osd *osd;
1043
1044 WARN_ON(onum == CEPH_HOMELESS_OSD);
1045
1046 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1047 osd_init(osd);
1048 osd->o_osdc = osdc;
1049 osd->o_osd = onum;
1050
1051 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1052
1053 return osd;
1054 }
1055
1056 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1057 {
1058 if (atomic_inc_not_zero(&osd->o_ref)) {
1059 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1060 atomic_read(&osd->o_ref));
1061 return osd;
1062 } else {
1063 dout("get_osd %p FAIL\n", osd);
1064 return NULL;
1065 }
1066 }
1067
1068 static void put_osd(struct ceph_osd *osd)
1069 {
1070 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1071 atomic_read(&osd->o_ref) - 1);
1072 if (atomic_dec_and_test(&osd->o_ref)) {
1073 osd_cleanup(osd);
1074 kfree(osd);
1075 }
1076 }
1077
1078 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1079
1080 /*
1081 * remove an osd from our map
1082 */
1083 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1084 {
1085 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1086 WARN_ON(!list_empty(&osd->o_requests));
1087 WARN_ON(!list_empty(&osd->o_linger_requests));
1088
1089 list_del_init(&osd->o_osd_lru);
1090 erase_osd(&osdc->osds, osd);
1091 }
1092
1093 static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1094 {
1095 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1096
1097 if (!RB_EMPTY_NODE(&osd->o_node)) {
1098 ceph_con_close(&osd->o_con);
1099 __remove_osd(osdc, osd);
1100 put_osd(osd);
1101 }
1102 }
1103
1104 static void __move_osd_to_lru(struct ceph_osd *osd)
1105 {
1106 struct ceph_osd_client *osdc = osd->o_osdc;
1107
1108 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1109 BUG_ON(!list_empty(&osd->o_osd_lru));
1110
1111 spin_lock(&osdc->osd_lru_lock);
1112 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1113 spin_unlock(&osdc->osd_lru_lock);
1114
1115 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1116 }
1117
1118 static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1119 {
1120 if (list_empty(&osd->o_requests) &&
1121 list_empty(&osd->o_linger_requests))
1122 __move_osd_to_lru(osd);
1123 }
1124
1125 static void __remove_osd_from_lru(struct ceph_osd *osd)
1126 {
1127 struct ceph_osd_client *osdc = osd->o_osdc;
1128
1129 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1130
1131 spin_lock(&osdc->osd_lru_lock);
1132 if (!list_empty(&osd->o_osd_lru))
1133 list_del_init(&osd->o_osd_lru);
1134 spin_unlock(&osdc->osd_lru_lock);
1135 }
1136
1137 /*
1138 * reset osd connect
1139 */
1140 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1141 {
1142 struct ceph_entity_addr *peer_addr;
1143
1144 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1145 if (list_empty(&osd->o_requests) &&
1146 list_empty(&osd->o_linger_requests)) {
1147 remove_osd(osdc, osd);
1148 return -ENODEV;
1149 }
1150
1151 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1152 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1153 !ceph_con_opened(&osd->o_con)) {
1154 struct ceph_osd_request *req;
1155
1156 dout("osd addr hasn't changed and connection never opened, "
1157 "letting msgr retry\n");
1158 /* touch each r_stamp for handle_timeout()'s benfit */
1159 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1160 req->r_stamp = jiffies;
1161
1162 return -EAGAIN;
1163 }
1164
1165 ceph_con_close(&osd->o_con);
1166 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1167 osd->o_incarnation++;
1168
1169 return 0;
1170 }
1171
1172 /*
1173 * Register request, assign tid. If this is the first request, set up
1174 * the timeout event.
1175 */
1176 static void __register_request(struct ceph_osd_client *osdc,
1177 struct ceph_osd_request *req)
1178 {
1179 req->r_tid = ++osdc->last_tid;
1180 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1181 dout("__register_request %p tid %lld\n", req, req->r_tid);
1182 insert_request(&osdc->requests, req);
1183 ceph_osdc_get_request(req);
1184 osdc->num_requests++;
1185 }
1186
1187 /*
1188 * called under osdc->request_mutex
1189 */
1190 static void __unregister_request(struct ceph_osd_client *osdc,
1191 struct ceph_osd_request *req)
1192 {
1193 if (RB_EMPTY_NODE(&req->r_node)) {
1194 dout("__unregister_request %p tid %lld not registered\n",
1195 req, req->r_tid);
1196 return;
1197 }
1198
1199 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1200 erase_request(&osdc->requests, req);
1201 osdc->num_requests--;
1202
1203 if (req->r_osd) {
1204 /* make sure the original request isn't in flight. */
1205 ceph_msg_revoke(req->r_request);
1206
1207 list_del_init(&req->r_osd_item);
1208 maybe_move_osd_to_lru(req->r_osd);
1209 if (list_empty(&req->r_linger_osd_item))
1210 req->r_osd = NULL;
1211 }
1212
1213 list_del_init(&req->r_req_lru_item);
1214 ceph_osdc_put_request(req);
1215 }
1216
1217 /*
1218 * Cancel a previously queued request message
1219 */
1220 static void __cancel_request(struct ceph_osd_request *req)
1221 {
1222 if (req->r_sent && req->r_osd) {
1223 ceph_msg_revoke(req->r_request);
1224 req->r_sent = 0;
1225 }
1226 }
1227
1228 static void __register_linger_request(struct ceph_osd_client *osdc,
1229 struct ceph_osd_request *req)
1230 {
1231 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1232 WARN_ON(!req->r_linger);
1233
1234 ceph_osdc_get_request(req);
1235 list_add_tail(&req->r_linger_item, &osdc->req_linger);
1236 if (req->r_osd)
1237 list_add_tail(&req->r_linger_osd_item,
1238 &req->r_osd->o_linger_requests);
1239 }
1240
1241 static void __unregister_linger_request(struct ceph_osd_client *osdc,
1242 struct ceph_osd_request *req)
1243 {
1244 WARN_ON(!req->r_linger);
1245
1246 if (list_empty(&req->r_linger_item)) {
1247 dout("%s %p tid %llu not registered\n", __func__, req,
1248 req->r_tid);
1249 return;
1250 }
1251
1252 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1253 list_del_init(&req->r_linger_item);
1254
1255 if (req->r_osd) {
1256 list_del_init(&req->r_linger_osd_item);
1257 maybe_move_osd_to_lru(req->r_osd);
1258 if (list_empty(&req->r_osd_item))
1259 req->r_osd = NULL;
1260 }
1261 ceph_osdc_put_request(req);
1262 }
1263
1264 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1265 struct ceph_osd_request *req)
1266 {
1267 if (!req->r_linger) {
1268 dout("set_request_linger %p\n", req);
1269 req->r_linger = 1;
1270 }
1271 }
1272 EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1273
1274 static bool __pool_full(struct ceph_pg_pool_info *pi)
1275 {
1276 return pi->flags & CEPH_POOL_FLAG_FULL;
1277 }
1278
1279 static bool have_pool_full(struct ceph_osd_client *osdc)
1280 {
1281 struct rb_node *n;
1282
1283 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1284 struct ceph_pg_pool_info *pi =
1285 rb_entry(n, struct ceph_pg_pool_info, node);
1286
1287 if (__pool_full(pi))
1288 return true;
1289 }
1290
1291 return false;
1292 }
1293
1294 /*
1295 * Returns whether a request should be blocked from being sent
1296 * based on the current osdmap and osd_client settings.
1297 *
1298 * Caller should hold map_sem for read.
1299 */
1300 static bool target_should_be_paused(struct ceph_osd_client *osdc,
1301 const struct ceph_osd_request_target *t,
1302 struct ceph_pg_pool_info *pi)
1303 {
1304 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1305 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1306 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1307 __pool_full(pi);
1308
1309 WARN_ON(pi->id != t->base_oloc.pool);
1310 return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
1311 (t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
1312 }
1313
1314 enum calc_target_result {
1315 CALC_TARGET_NO_ACTION = 0,
1316 CALC_TARGET_NEED_RESEND,
1317 CALC_TARGET_POOL_DNE,
1318 };
1319
1320 static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1321 struct ceph_osd_request_target *t,
1322 u32 *last_force_resend,
1323 bool any_change)
1324 {
1325 struct ceph_pg_pool_info *pi;
1326 struct ceph_pg pgid, last_pgid;
1327 struct ceph_osds up, acting;
1328 bool force_resend = false;
1329 bool need_check_tiering = false;
1330 bool need_resend = false;
1331 bool sort_bitwise = ceph_osdmap_flag(osdc->osdmap,
1332 CEPH_OSDMAP_SORTBITWISE);
1333 enum calc_target_result ct_res;
1334 int ret;
1335
1336 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1337 if (!pi) {
1338 t->osd = CEPH_HOMELESS_OSD;
1339 ct_res = CALC_TARGET_POOL_DNE;
1340 goto out;
1341 }
1342
1343 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1344 if (last_force_resend &&
1345 *last_force_resend < pi->last_force_request_resend) {
1346 *last_force_resend = pi->last_force_request_resend;
1347 force_resend = true;
1348 } else if (!last_force_resend) {
1349 force_resend = true;
1350 }
1351 }
1352 if (ceph_oid_empty(&t->target_oid) || force_resend) {
1353 ceph_oid_copy(&t->target_oid, &t->base_oid);
1354 need_check_tiering = true;
1355 }
1356 if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
1357 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1358 need_check_tiering = true;
1359 }
1360
1361 if (need_check_tiering &&
1362 (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1363 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1364 t->target_oloc.pool = pi->read_tier;
1365 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1366 t->target_oloc.pool = pi->write_tier;
1367 }
1368
1369 ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
1370 &t->target_oloc, &pgid);
1371 if (ret) {
1372 WARN_ON(ret != -ENOENT);
1373 t->osd = CEPH_HOMELESS_OSD;
1374 ct_res = CALC_TARGET_POOL_DNE;
1375 goto out;
1376 }
1377 last_pgid.pool = pgid.pool;
1378 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1379
1380 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
1381 if (any_change &&
1382 ceph_is_new_interval(&t->acting,
1383 &acting,
1384 &t->up,
1385 &up,
1386 t->size,
1387 pi->size,
1388 t->min_size,
1389 pi->min_size,
1390 t->pg_num,
1391 pi->pg_num,
1392 t->sort_bitwise,
1393 sort_bitwise,
1394 &last_pgid))
1395 force_resend = true;
1396
1397 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1398 t->paused = false;
1399 need_resend = true;
1400 }
1401
1402 if (ceph_pg_compare(&t->pgid, &pgid) ||
1403 ceph_osds_changed(&t->acting, &acting, any_change) ||
1404 force_resend) {
1405 t->pgid = pgid; /* struct */
1406 ceph_osds_copy(&t->acting, &acting);
1407 ceph_osds_copy(&t->up, &up);
1408 t->size = pi->size;
1409 t->min_size = pi->min_size;
1410 t->pg_num = pi->pg_num;
1411 t->pg_num_mask = pi->pg_num_mask;
1412 t->sort_bitwise = sort_bitwise;
1413
1414 t->osd = acting.primary;
1415 need_resend = true;
1416 }
1417
1418 ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION;
1419 out:
1420 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1421 return ct_res;
1422 }
1423
1424 static void __enqueue_request(struct ceph_osd_request *req)
1425 {
1426 struct ceph_osd_client *osdc = req->r_osdc;
1427
1428 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1429 req->r_osd ? req->r_osd->o_osd : -1);
1430
1431 if (req->r_osd) {
1432 __remove_osd_from_lru(req->r_osd);
1433 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1434 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1435 } else {
1436 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1437 }
1438 }
1439
1440 /*
1441 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1442 * (as needed), and set the request r_osd appropriately. If there is
1443 * no up osd, set r_osd to NULL. Move the request to the appropriate list
1444 * (unsent, homeless) or leave on in-flight lru.
1445 *
1446 * Return 0 if unchanged, 1 if changed, or negative on error.
1447 *
1448 * Caller should hold map_sem for read and request_mutex.
1449 */
1450 static int __map_request(struct ceph_osd_client *osdc,
1451 struct ceph_osd_request *req, int force_resend)
1452 {
1453 enum calc_target_result ct_res;
1454 int err;
1455
1456 dout("map_request %p tid %lld\n", req, req->r_tid);
1457
1458 ct_res = calc_target(osdc, &req->r_t, NULL, force_resend);
1459 switch (ct_res) {
1460 case CALC_TARGET_POOL_DNE:
1461 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1462 return -EIO;
1463 case CALC_TARGET_NO_ACTION:
1464 return 0; /* no change */
1465 default:
1466 BUG_ON(ct_res != CALC_TARGET_NEED_RESEND);
1467 }
1468
1469 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1470 req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, req->r_t.osd,
1471 req->r_osd ? req->r_osd->o_osd : -1);
1472
1473 if (req->r_osd) {
1474 __cancel_request(req);
1475 list_del_init(&req->r_osd_item);
1476 list_del_init(&req->r_linger_osd_item);
1477 req->r_osd = NULL;
1478 }
1479
1480 req->r_osd = lookup_osd(&osdc->osds, req->r_t.osd);
1481 if (!req->r_osd && req->r_t.osd >= 0) {
1482 err = -ENOMEM;
1483 req->r_osd = create_osd(osdc, req->r_t.osd);
1484 if (!req->r_osd) {
1485 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1486 goto out;
1487 }
1488
1489 dout("map_request osd %p is osd%d\n", req->r_osd,
1490 req->r_osd->o_osd);
1491 insert_osd(&osdc->osds, req->r_osd);
1492
1493 ceph_con_open(&req->r_osd->o_con,
1494 CEPH_ENTITY_TYPE_OSD, req->r_osd->o_osd,
1495 &osdc->osdmap->osd_addr[req->r_osd->o_osd]);
1496 }
1497
1498 __enqueue_request(req);
1499 err = 1; /* osd or pg changed */
1500
1501 out:
1502 return err;
1503 }
1504
1505 static void setup_request_data(struct ceph_osd_request *req,
1506 struct ceph_msg *msg)
1507 {
1508 u32 data_len = 0;
1509 int i;
1510
1511 if (!list_empty(&msg->data))
1512 return;
1513
1514 WARN_ON(msg->data_length);
1515 for (i = 0; i < req->r_num_ops; i++) {
1516 struct ceph_osd_req_op *op = &req->r_ops[i];
1517
1518 switch (op->op) {
1519 /* request */
1520 case CEPH_OSD_OP_WRITE:
1521 case CEPH_OSD_OP_WRITEFULL:
1522 WARN_ON(op->indata_len != op->extent.length);
1523 ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1524 break;
1525 case CEPH_OSD_OP_SETXATTR:
1526 case CEPH_OSD_OP_CMPXATTR:
1527 WARN_ON(op->indata_len != op->xattr.name_len +
1528 op->xattr.value_len);
1529 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1530 break;
1531
1532 /* reply */
1533 case CEPH_OSD_OP_STAT:
1534 ceph_osdc_msg_data_add(req->r_reply,
1535 &op->raw_data_in);
1536 break;
1537 case CEPH_OSD_OP_READ:
1538 ceph_osdc_msg_data_add(req->r_reply,
1539 &op->extent.osd_data);
1540 break;
1541
1542 /* both */
1543 case CEPH_OSD_OP_CALL:
1544 WARN_ON(op->indata_len != op->cls.class_len +
1545 op->cls.method_len +
1546 op->cls.indata_len);
1547 ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1548 /* optional, can be NONE */
1549 ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1550 /* optional, can be NONE */
1551 ceph_osdc_msg_data_add(req->r_reply,
1552 &op->cls.response_data);
1553 break;
1554 }
1555
1556 data_len += op->indata_len;
1557 }
1558
1559 WARN_ON(data_len != msg->data_length);
1560 }
1561
1562 static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
1563 {
1564 void *p = msg->front.iov_base;
1565 void *const end = p + msg->front_alloc_len;
1566 u32 data_len = 0;
1567 int i;
1568
1569 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1570 /* snapshots aren't writeable */
1571 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1572 } else {
1573 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1574 req->r_data_offset || req->r_snapc);
1575 }
1576
1577 setup_request_data(req, msg);
1578
1579 ceph_encode_32(&p, 1); /* client_inc, always 1 */
1580 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1581 ceph_encode_32(&p, req->r_flags);
1582 ceph_encode_timespec(p, &req->r_mtime);
1583 p += sizeof(struct ceph_timespec);
1584 /* aka reassert_version */
1585 memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version));
1586 p += sizeof(req->r_replay_version);
1587
1588 /* oloc */
1589 ceph_encode_8(&p, 4);
1590 ceph_encode_8(&p, 4);
1591 ceph_encode_32(&p, 8 + 4 + 4);
1592 ceph_encode_64(&p, req->r_t.target_oloc.pool);
1593 ceph_encode_32(&p, -1); /* preferred */
1594 ceph_encode_32(&p, 0); /* key len */
1595
1596 /* pgid */
1597 ceph_encode_8(&p, 1);
1598 ceph_encode_64(&p, req->r_t.pgid.pool);
1599 ceph_encode_32(&p, req->r_t.pgid.seed);
1600 ceph_encode_32(&p, -1); /* preferred */
1601
1602 /* oid */
1603 ceph_encode_32(&p, req->r_t.target_oid.name_len);
1604 memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len);
1605 p += req->r_t.target_oid.name_len;
1606
1607 /* ops, can imply data */
1608 ceph_encode_16(&p, req->r_num_ops);
1609 for (i = 0; i < req->r_num_ops; i++) {
1610 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1611 p += sizeof(struct ceph_osd_op);
1612 }
1613
1614 ceph_encode_64(&p, req->r_snapid); /* snapid */
1615 if (req->r_snapc) {
1616 ceph_encode_64(&p, req->r_snapc->seq);
1617 ceph_encode_32(&p, req->r_snapc->num_snaps);
1618 for (i = 0; i < req->r_snapc->num_snaps; i++)
1619 ceph_encode_64(&p, req->r_snapc->snaps[i]);
1620 } else {
1621 ceph_encode_64(&p, 0); /* snap_seq */
1622 ceph_encode_32(&p, 0); /* snaps len */
1623 }
1624
1625 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
1626
1627 BUG_ON(p > end);
1628 msg->front.iov_len = p - msg->front.iov_base;
1629 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
1630 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
1631 msg->hdr.data_len = cpu_to_le32(data_len);
1632 /*
1633 * The header "data_off" is a hint to the receiver allowing it
1634 * to align received data into its buffers such that there's no
1635 * need to re-copy it before writing it to disk (direct I/O).
1636 */
1637 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
1638
1639 dout("%s req %p oid %*pE oid_len %d front %zu data %u\n", __func__,
1640 req, req->r_t.target_oid.name_len, req->r_t.target_oid.name,
1641 req->r_t.target_oid.name_len, msg->front.iov_len, data_len);
1642 }
1643
1644 /*
1645 * @req has to be assigned a tid and registered.
1646 */
1647 static void send_request(struct ceph_osd_request *req)
1648 {
1649 struct ceph_osd *osd = req->r_osd;
1650
1651 WARN_ON(osd->o_osd != req->r_t.osd);
1652
1653 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
1654 if (req->r_attempts)
1655 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1656 else
1657 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
1658
1659 encode_request(req, req->r_request);
1660
1661 dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n",
1662 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
1663 req->r_t.osd, req->r_flags, req->r_attempts);
1664
1665 req->r_t.paused = false;
1666 req->r_stamp = jiffies;
1667 req->r_attempts++;
1668
1669 req->r_sent = osd->o_incarnation;
1670 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1671 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
1672 }
1673
1674 /*
1675 * Send any requests in the queue (req_unsent).
1676 */
1677 static void __send_queued(struct ceph_osd_client *osdc)
1678 {
1679 struct ceph_osd_request *req, *tmp;
1680
1681 dout("__send_queued\n");
1682 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) {
1683 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1684 send_request(req);
1685 }
1686 }
1687
1688 static void maybe_request_map(struct ceph_osd_client *osdc)
1689 {
1690 bool continuous = false;
1691
1692 WARN_ON(!osdc->osdmap->epoch);
1693
1694 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1695 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
1696 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) {
1697 dout("%s osdc %p continuous\n", __func__, osdc);
1698 continuous = true;
1699 } else {
1700 dout("%s osdc %p onetime\n", __func__, osdc);
1701 }
1702
1703 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
1704 osdc->osdmap->epoch + 1, continuous))
1705 ceph_monc_renew_subs(&osdc->client->monc);
1706 }
1707
1708 /*
1709 * Caller should hold map_sem for read and request_mutex.
1710 */
1711 static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1712 struct ceph_osd_request *req,
1713 bool nofail)
1714 {
1715 int rc;
1716
1717 __register_request(osdc, req);
1718 req->r_sent = 0;
1719 req->r_got_reply = 0;
1720 rc = __map_request(osdc, req, 0);
1721 if (rc < 0) {
1722 if (nofail) {
1723 dout("osdc_start_request failed map, "
1724 " will retry %lld\n", req->r_tid);
1725 rc = 0;
1726 } else {
1727 __unregister_request(osdc, req);
1728 }
1729 return rc;
1730 }
1731
1732 if (req->r_osd == NULL) {
1733 dout("send_request %p no up osds in pg\n", req);
1734 ceph_monc_request_next_osdmap(&osdc->client->monc);
1735 } else {
1736 __send_queued(osdc);
1737 }
1738
1739 return 0;
1740 }
1741
1742 static void __complete_request(struct ceph_osd_request *req)
1743 {
1744 if (req->r_callback)
1745 req->r_callback(req);
1746 else
1747 complete_all(&req->r_completion);
1748 }
1749
1750 /*
1751 * Timeout callback, called every N seconds. When 1 or more OSD
1752 * requests has been active for more than N seconds, we send a keepalive
1753 * (tag + timestamp) to its OSD to ensure any communications channel
1754 * reset is detected.
1755 */
1756 static void handle_timeout(struct work_struct *work)
1757 {
1758 struct ceph_osd_client *osdc =
1759 container_of(work, struct ceph_osd_client, timeout_work.work);
1760 struct ceph_options *opts = osdc->client->options;
1761 struct ceph_osd_request *req;
1762 struct ceph_osd *osd;
1763 struct list_head slow_osds;
1764 dout("timeout\n");
1765 down_read(&osdc->map_sem);
1766
1767 ceph_monc_request_next_osdmap(&osdc->client->monc);
1768
1769 mutex_lock(&osdc->request_mutex);
1770
1771 /*
1772 * ping osds that are a bit slow. this ensures that if there
1773 * is a break in the TCP connection we will notice, and reopen
1774 * a connection with that osd (from the fault callback).
1775 */
1776 INIT_LIST_HEAD(&slow_osds);
1777 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
1778 if (time_before(jiffies,
1779 req->r_stamp + opts->osd_keepalive_timeout))
1780 break;
1781
1782 osd = req->r_osd;
1783 BUG_ON(!osd);
1784 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1785 req->r_tid, osd->o_osd);
1786 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1787 }
1788 while (!list_empty(&slow_osds)) {
1789 osd = list_entry(slow_osds.next, struct ceph_osd,
1790 o_keepalive_item);
1791 list_del_init(&osd->o_keepalive_item);
1792 ceph_con_keepalive(&osd->o_con);
1793 }
1794
1795 __send_queued(osdc);
1796 mutex_unlock(&osdc->request_mutex);
1797 up_read(&osdc->map_sem);
1798
1799 schedule_delayed_work(&osdc->timeout_work,
1800 osdc->client->options->osd_keepalive_timeout);
1801 }
1802
1803 static void handle_osds_timeout(struct work_struct *work)
1804 {
1805 struct ceph_osd_client *osdc =
1806 container_of(work, struct ceph_osd_client,
1807 osds_timeout_work.work);
1808 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
1809 struct ceph_osd *osd, *nosd;
1810
1811 dout("%s osdc %p\n", __func__, osdc);
1812 down_read(&osdc->map_sem);
1813 mutex_lock(&osdc->request_mutex);
1814
1815 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1816 if (time_before(jiffies, osd->lru_ttl))
1817 break;
1818
1819 remove_osd(osdc, osd);
1820 }
1821
1822 mutex_unlock(&osdc->request_mutex);
1823 up_read(&osdc->map_sem);
1824 schedule_delayed_work(&osdc->osds_timeout_work,
1825 round_jiffies_relative(delay));
1826 }
1827
1828 static int ceph_oloc_decode(void **p, void *end,
1829 struct ceph_object_locator *oloc)
1830 {
1831 u8 struct_v, struct_cv;
1832 u32 len;
1833 void *struct_end;
1834 int ret = 0;
1835
1836 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1837 struct_v = ceph_decode_8(p);
1838 struct_cv = ceph_decode_8(p);
1839 if (struct_v < 3) {
1840 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1841 struct_v, struct_cv);
1842 goto e_inval;
1843 }
1844 if (struct_cv > 6) {
1845 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1846 struct_v, struct_cv);
1847 goto e_inval;
1848 }
1849 len = ceph_decode_32(p);
1850 ceph_decode_need(p, end, len, e_inval);
1851 struct_end = *p + len;
1852
1853 oloc->pool = ceph_decode_64(p);
1854 *p += 4; /* skip preferred */
1855
1856 len = ceph_decode_32(p);
1857 if (len > 0) {
1858 pr_warn("ceph_object_locator::key is set\n");
1859 goto e_inval;
1860 }
1861
1862 if (struct_v >= 5) {
1863 len = ceph_decode_32(p);
1864 if (len > 0) {
1865 pr_warn("ceph_object_locator::nspace is set\n");
1866 goto e_inval;
1867 }
1868 }
1869
1870 if (struct_v >= 6) {
1871 s64 hash = ceph_decode_64(p);
1872 if (hash != -1) {
1873 pr_warn("ceph_object_locator::hash is set\n");
1874 goto e_inval;
1875 }
1876 }
1877
1878 /* skip the rest */
1879 *p = struct_end;
1880 out:
1881 return ret;
1882
1883 e_inval:
1884 ret = -EINVAL;
1885 goto out;
1886 }
1887
1888 static int ceph_redirect_decode(void **p, void *end,
1889 struct ceph_request_redirect *redir)
1890 {
1891 u8 struct_v, struct_cv;
1892 u32 len;
1893 void *struct_end;
1894 int ret;
1895
1896 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1897 struct_v = ceph_decode_8(p);
1898 struct_cv = ceph_decode_8(p);
1899 if (struct_cv > 1) {
1900 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1901 struct_v, struct_cv);
1902 goto e_inval;
1903 }
1904 len = ceph_decode_32(p);
1905 ceph_decode_need(p, end, len, e_inval);
1906 struct_end = *p + len;
1907
1908 ret = ceph_oloc_decode(p, end, &redir->oloc);
1909 if (ret)
1910 goto out;
1911
1912 len = ceph_decode_32(p);
1913 if (len > 0) {
1914 pr_warn("ceph_request_redirect::object_name is set\n");
1915 goto e_inval;
1916 }
1917
1918 len = ceph_decode_32(p);
1919 *p += len; /* skip osd_instructions */
1920
1921 /* skip the rest */
1922 *p = struct_end;
1923 out:
1924 return ret;
1925
1926 e_inval:
1927 ret = -EINVAL;
1928 goto out;
1929 }
1930
1931 struct MOSDOpReply {
1932 struct ceph_pg pgid;
1933 u64 flags;
1934 int result;
1935 u32 epoch;
1936 int num_ops;
1937 u32 outdata_len[CEPH_OSD_MAX_OPS];
1938 s32 rval[CEPH_OSD_MAX_OPS];
1939 int retry_attempt;
1940 struct ceph_eversion replay_version;
1941 u64 user_version;
1942 struct ceph_request_redirect redirect;
1943 };
1944
1945 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
1946 {
1947 void *p = msg->front.iov_base;
1948 void *const end = p + msg->front.iov_len;
1949 u16 version = le16_to_cpu(msg->hdr.version);
1950 struct ceph_eversion bad_replay_version;
1951 u8 decode_redir;
1952 u32 len;
1953 int ret;
1954 int i;
1955
1956 ceph_decode_32_safe(&p, end, len, e_inval);
1957 ceph_decode_need(&p, end, len, e_inval);
1958 p += len; /* skip oid */
1959
1960 ret = ceph_decode_pgid(&p, end, &m->pgid);
1961 if (ret)
1962 return ret;
1963
1964 ceph_decode_64_safe(&p, end, m->flags, e_inval);
1965 ceph_decode_32_safe(&p, end, m->result, e_inval);
1966 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
1967 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
1968 p += sizeof(bad_replay_version);
1969 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1970
1971 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
1972 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
1973 goto e_inval;
1974
1975 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
1976 e_inval);
1977 for (i = 0; i < m->num_ops; i++) {
1978 struct ceph_osd_op *op = p;
1979
1980 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1981 p += sizeof(*op);
1982 }
1983
1984 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
1985 for (i = 0; i < m->num_ops; i++)
1986 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
1987
1988 if (version >= 5) {
1989 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
1990 memcpy(&m->replay_version, p, sizeof(m->replay_version));
1991 p += sizeof(m->replay_version);
1992 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
1993 } else {
1994 m->replay_version = bad_replay_version; /* struct */
1995 m->user_version = le64_to_cpu(m->replay_version.version);
1996 }
1997
1998 if (version >= 6) {
1999 if (version >= 7)
2000 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
2001 else
2002 decode_redir = 1;
2003 } else {
2004 decode_redir = 0;
2005 }
2006
2007 if (decode_redir) {
2008 ret = ceph_redirect_decode(&p, end, &m->redirect);
2009 if (ret)
2010 return ret;
2011 } else {
2012 ceph_oloc_init(&m->redirect.oloc);
2013 }
2014
2015 return 0;
2016
2017 e_inval:
2018 return -EINVAL;
2019 }
2020
2021 /*
2022 * We are done with @req if
2023 * - @m is a safe reply, or
2024 * - @m is an unsafe reply and we didn't want a safe one
2025 */
2026 static bool done_request(const struct ceph_osd_request *req,
2027 const struct MOSDOpReply *m)
2028 {
2029 return (m->result < 0 ||
2030 (m->flags & CEPH_OSD_FLAG_ONDISK) ||
2031 !(req->r_flags & CEPH_OSD_FLAG_ONDISK));
2032 }
2033
2034 /*
2035 * handle osd op reply. either call the callback if it is specified,
2036 * or do the completion to wake up the waiting thread.
2037 *
2038 * ->r_unsafe_callback is set? yes no
2039 *
2040 * first reply is OK (needed r_cb/r_completion, r_cb/r_completion,
2041 * any or needed/got safe) r_safe_completion r_safe_completion
2042 *
2043 * first reply is unsafe r_unsafe_cb(true) (nothing)
2044 *
2045 * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion,
2046 * r_safe_completion r_safe_completion
2047 */
2048 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2049 {
2050 struct ceph_osd_request *req;
2051 struct MOSDOpReply m;
2052 u64 tid = le64_to_cpu(msg->hdr.tid);
2053 u32 data_len = 0;
2054 bool already_acked;
2055 int ret;
2056 int i;
2057
2058 dout("%s msg %p tid %llu\n", __func__, msg, tid);
2059
2060 down_read(&osdc->map_sem);
2061 mutex_lock(&osdc->request_mutex);
2062 req = lookup_request(&osdc->requests, tid);
2063 if (!req) {
2064 dout("%s no tid %llu\n", __func__, tid);
2065 goto out_unlock;
2066 }
2067 ceph_osdc_get_request(req);
2068
2069 ret = decode_MOSDOpReply(msg, &m);
2070 if (ret) {
2071 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
2072 req->r_tid, ret);
2073 ceph_msg_dump(msg);
2074 goto fail_request;
2075 }
2076 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
2077 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
2078 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
2079 le64_to_cpu(m.replay_version.version), m.user_version);
2080
2081 if (m.retry_attempt >= 0) {
2082 if (m.retry_attempt != req->r_attempts - 1) {
2083 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
2084 req, req->r_tid, m.retry_attempt,
2085 req->r_attempts - 1);
2086 goto out_put;
2087 }
2088 } else {
2089 WARN_ON(1); /* MOSDOpReply v4 is assumed */
2090 }
2091
2092 if (!ceph_oloc_empty(&m.redirect.oloc)) {
2093 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
2094 m.redirect.oloc.pool);
2095 __unregister_request(osdc, req);
2096
2097 ceph_oloc_copy(&req->r_t.target_oloc, &m.redirect.oloc);
2098
2099 /*
2100 * Start redirect requests with nofail=true. If
2101 * mapping fails, request will end up on the notarget
2102 * list, waiting for the new osdmap (which can take
2103 * a while), even though the original request mapped
2104 * successfully. In the future we might want to follow
2105 * original request's nofail setting here.
2106 */
2107 ret = __ceph_osdc_start_request(osdc, req, true);
2108 BUG_ON(ret);
2109
2110 goto out_put;
2111 }
2112
2113 if (m.num_ops != req->r_num_ops) {
2114 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
2115 req->r_num_ops, req->r_tid);
2116 goto fail_request;
2117 }
2118 for (i = 0; i < req->r_num_ops; i++) {
2119 dout(" req %p tid %llu op %d rval %d len %u\n", req,
2120 req->r_tid, i, m.rval[i], m.outdata_len[i]);
2121 req->r_ops[i].rval = m.rval[i];
2122 req->r_ops[i].outdata_len = m.outdata_len[i];
2123 data_len += m.outdata_len[i];
2124 }
2125 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
2126 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
2127 le32_to_cpu(msg->hdr.data_len), req->r_tid);
2128 goto fail_request;
2129 }
2130 dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
2131 req, req->r_tid, req->r_got_reply, m.result, data_len);
2132
2133 already_acked = req->r_got_reply;
2134 if (!already_acked) {
2135 req->r_result = m.result ?: data_len;
2136 req->r_replay_version = m.replay_version; /* struct */
2137 req->r_got_reply = true;
2138 } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) {
2139 dout("req %p tid %llu dup ack\n", req, req->r_tid);
2140 goto out_put;
2141 }
2142
2143 if (done_request(req, &m)) {
2144 __unregister_request(osdc, req);
2145 if (req->r_linger) {
2146 WARN_ON(req->r_unsafe_callback);
2147 __register_linger_request(osdc, req);
2148 }
2149 }
2150
2151 mutex_unlock(&osdc->request_mutex);
2152 up_read(&osdc->map_sem);
2153
2154 if (done_request(req, &m)) {
2155 if (already_acked && req->r_unsafe_callback) {
2156 dout("req %p tid %llu safe-cb\n", req, req->r_tid);
2157 req->r_unsafe_callback(req, false);
2158 } else {
2159 dout("req %p tid %llu cb\n", req, req->r_tid);
2160 __complete_request(req);
2161 }
2162 } else {
2163 if (req->r_unsafe_callback) {
2164 dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
2165 req->r_unsafe_callback(req, true);
2166 } else {
2167 WARN_ON(1);
2168 }
2169 }
2170 if (m.flags & CEPH_OSD_FLAG_ONDISK)
2171 complete_all(&req->r_safe_completion);
2172
2173 ceph_osdc_put_request(req);
2174 return;
2175
2176 fail_request:
2177 req->r_result = -EIO;
2178 __unregister_request(osdc, req);
2179 __complete_request(req);
2180 complete_all(&req->r_safe_completion);
2181 out_put:
2182 ceph_osdc_put_request(req);
2183 out_unlock:
2184 mutex_unlock(&osdc->request_mutex);
2185 up_read(&osdc->map_sem);
2186 }
2187
2188 static void set_pool_was_full(struct ceph_osd_client *osdc)
2189 {
2190 struct rb_node *n;
2191
2192 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
2193 struct ceph_pg_pool_info *pi =
2194 rb_entry(n, struct ceph_pg_pool_info, node);
2195
2196 pi->was_full = __pool_full(pi);
2197 }
2198 }
2199
2200 static void reset_changed_osds(struct ceph_osd_client *osdc)
2201 {
2202 struct rb_node *p, *n;
2203
2204 dout("%s %p\n", __func__, osdc);
2205 for (p = rb_first(&osdc->osds); p; p = n) {
2206 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
2207
2208 n = rb_next(p);
2209 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
2210 memcmp(&osd->o_con.peer_addr,
2211 ceph_osd_addr(osdc->osdmap,
2212 osd->o_osd),
2213 sizeof(struct ceph_entity_addr)) != 0)
2214 __reset_osd(osdc, osd);
2215 }
2216 }
2217
2218 /*
2219 * Requeue requests whose mapping to an OSD has changed. If requests map to
2220 * no osd, request a new map.
2221 *
2222 * Caller should hold map_sem for read.
2223 */
2224 static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
2225 bool force_resend_writes)
2226 {
2227 struct ceph_osd_request *req, *nreq;
2228 struct rb_node *p;
2229 int needmap = 0;
2230 int err;
2231 bool force_resend_req;
2232
2233 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
2234 force_resend_writes ? " (force resend writes)" : "");
2235 mutex_lock(&osdc->request_mutex);
2236 for (p = rb_first(&osdc->requests); p; ) {
2237 req = rb_entry(p, struct ceph_osd_request, r_node);
2238 p = rb_next(p);
2239
2240 /*
2241 * For linger requests that have not yet been
2242 * registered, move them to the linger list; they'll
2243 * be sent to the osd in the loop below. Unregister
2244 * the request before re-registering it as a linger
2245 * request to ensure the __map_request() below
2246 * will decide it needs to be sent.
2247 */
2248 if (req->r_linger && list_empty(&req->r_linger_item)) {
2249 dout("%p tid %llu restart on osd%d\n",
2250 req, req->r_tid,
2251 req->r_osd ? req->r_osd->o_osd : -1);
2252 ceph_osdc_get_request(req);
2253 __unregister_request(osdc, req);
2254 __register_linger_request(osdc, req);
2255 ceph_osdc_put_request(req);
2256 continue;
2257 }
2258
2259 force_resend_req = force_resend ||
2260 (force_resend_writes &&
2261 req->r_flags & CEPH_OSD_FLAG_WRITE);
2262 err = __map_request(osdc, req, force_resend_req);
2263 if (err < 0)
2264 continue; /* error */
2265 if (req->r_osd == NULL) {
2266 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
2267 needmap++; /* request a newer map */
2268 } else if (err > 0) {
2269 if (!req->r_linger) {
2270 dout("%p tid %llu requeued on osd%d\n", req,
2271 req->r_tid,
2272 req->r_osd ? req->r_osd->o_osd : -1);
2273 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2274 }
2275 }
2276 }
2277
2278 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
2279 r_linger_item) {
2280 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
2281
2282 err = __map_request(osdc, req,
2283 force_resend || force_resend_writes);
2284 dout("__map_request returned %d\n", err);
2285 if (err < 0)
2286 continue; /* hrm! */
2287 if (req->r_osd == NULL || err > 0) {
2288 if (req->r_osd == NULL) {
2289 dout("lingering %p tid %llu maps to no osd\n",
2290 req, req->r_tid);
2291 /*
2292 * A homeless lingering request makes
2293 * no sense, as it's job is to keep
2294 * a particular OSD connection open.
2295 * Request a newer map and kick the
2296 * request, knowing that it won't be
2297 * resent until we actually get a map
2298 * that can tell us where to send it.
2299 */
2300 needmap++;
2301 }
2302
2303 dout("kicking lingering %p tid %llu osd%d\n", req,
2304 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1);
2305 __register_request(osdc, req);
2306 __unregister_linger_request(osdc, req);
2307 }
2308 }
2309 reset_changed_osds(osdc);
2310 mutex_unlock(&osdc->request_mutex);
2311
2312 if (needmap) {
2313 dout("%d requests for down osds, need new map\n", needmap);
2314 ceph_monc_request_next_osdmap(&osdc->client->monc);
2315 }
2316 }
2317
2318 static int handle_one_map(struct ceph_osd_client *osdc,
2319 void *p, void *end, bool incremental)
2320 {
2321 struct ceph_osdmap *newmap;
2322 struct rb_node *n;
2323 bool skipped_map = false;
2324 bool was_full;
2325
2326 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2327 set_pool_was_full(osdc);
2328
2329 if (incremental)
2330 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
2331 else
2332 newmap = ceph_osdmap_decode(&p, end);
2333 if (IS_ERR(newmap))
2334 return PTR_ERR(newmap);
2335
2336 if (newmap != osdc->osdmap) {
2337 /*
2338 * Preserve ->was_full before destroying the old map.
2339 * For pools that weren't in the old map, ->was_full
2340 * should be false.
2341 */
2342 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
2343 struct ceph_pg_pool_info *pi =
2344 rb_entry(n, struct ceph_pg_pool_info, node);
2345 struct ceph_pg_pool_info *old_pi;
2346
2347 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
2348 if (old_pi)
2349 pi->was_full = old_pi->was_full;
2350 else
2351 WARN_ON(pi->was_full);
2352 }
2353
2354 if (osdc->osdmap->epoch &&
2355 osdc->osdmap->epoch + 1 < newmap->epoch) {
2356 WARN_ON(incremental);
2357 skipped_map = true;
2358 }
2359
2360 ceph_osdmap_destroy(osdc->osdmap);
2361 osdc->osdmap = newmap;
2362 }
2363
2364 was_full &= !ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2365 kick_requests(osdc, skipped_map, was_full);
2366
2367 return 0;
2368 }
2369
2370 /*
2371 * Process updated osd map.
2372 *
2373 * The message contains any number of incremental and full maps, normally
2374 * indicating some sort of topology change in the cluster. Kick requests
2375 * off to different OSDs as needed.
2376 */
2377 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2378 {
2379 void *p = msg->front.iov_base;
2380 void *const end = p + msg->front.iov_len;
2381 u32 nr_maps, maplen;
2382 u32 epoch;
2383 struct ceph_fsid fsid;
2384 bool handled_incremental = false;
2385 bool was_pauserd, was_pausewr;
2386 bool pauserd, pausewr;
2387 int err;
2388
2389 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
2390 down_write(&osdc->map_sem);
2391
2392 /* verify fsid */
2393 ceph_decode_need(&p, end, sizeof(fsid), bad);
2394 ceph_decode_copy(&p, &fsid, sizeof(fsid));
2395 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2396 goto bad;
2397
2398 was_pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
2399 was_pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
2400 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2401 have_pool_full(osdc);
2402
2403 /* incremental maps */
2404 ceph_decode_32_safe(&p, end, nr_maps, bad);
2405 dout(" %d inc maps\n", nr_maps);
2406 while (nr_maps > 0) {
2407 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
2408 epoch = ceph_decode_32(&p);
2409 maplen = ceph_decode_32(&p);
2410 ceph_decode_need(&p, end, maplen, bad);
2411 if (osdc->osdmap->epoch &&
2412 osdc->osdmap->epoch + 1 == epoch) {
2413 dout("applying incremental map %u len %d\n",
2414 epoch, maplen);
2415 err = handle_one_map(osdc, p, p + maplen, true);
2416 if (err)
2417 goto bad;
2418 handled_incremental = true;
2419 } else {
2420 dout("ignoring incremental map %u len %d\n",
2421 epoch, maplen);
2422 }
2423 p += maplen;
2424 nr_maps--;
2425 }
2426 if (handled_incremental)
2427 goto done;
2428
2429 /* full maps */
2430 ceph_decode_32_safe(&p, end, nr_maps, bad);
2431 dout(" %d full maps\n", nr_maps);
2432 while (nr_maps) {
2433 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
2434 epoch = ceph_decode_32(&p);
2435 maplen = ceph_decode_32(&p);
2436 ceph_decode_need(&p, end, maplen, bad);
2437 if (nr_maps > 1) {
2438 dout("skipping non-latest full map %u len %d\n",
2439 epoch, maplen);
2440 } else if (osdc->osdmap->epoch >= epoch) {
2441 dout("skipping full map %u len %d, "
2442 "older than our %u\n", epoch, maplen,
2443 osdc->osdmap->epoch);
2444 } else {
2445 dout("taking full map %u len %d\n", epoch, maplen);
2446 err = handle_one_map(osdc, p, p + maplen, false);
2447 if (err)
2448 goto bad;
2449 }
2450 p += maplen;
2451 nr_maps--;
2452 }
2453
2454 done:
2455 /*
2456 * subscribe to subsequent osdmap updates if full to ensure
2457 * we find out when we are no longer full and stop returning
2458 * ENOSPC.
2459 */
2460 pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
2461 pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
2462 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2463 have_pool_full(osdc);
2464 if (was_pauserd || was_pausewr || pauserd || pausewr)
2465 maybe_request_map(osdc);
2466
2467 mutex_lock(&osdc->request_mutex);
2468 __send_queued(osdc);
2469 mutex_unlock(&osdc->request_mutex);
2470
2471 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2472 osdc->osdmap->epoch);
2473 up_write(&osdc->map_sem);
2474 wake_up_all(&osdc->client->auth_wq);
2475 return;
2476
2477 bad:
2478 pr_err("osdc handle_map corrupt msg\n");
2479 ceph_msg_dump(msg);
2480 up_write(&osdc->map_sem);
2481 }
2482
2483 /*
2484 * watch/notify callback event infrastructure
2485 *
2486 * These callbacks are used both for watch and notify operations.
2487 */
2488 static void __release_event(struct kref *kref)
2489 {
2490 struct ceph_osd_event *event =
2491 container_of(kref, struct ceph_osd_event, kref);
2492
2493 dout("__release_event %p\n", event);
2494 kfree(event);
2495 }
2496
2497 static void get_event(struct ceph_osd_event *event)
2498 {
2499 kref_get(&event->kref);
2500 }
2501
2502 void ceph_osdc_put_event(struct ceph_osd_event *event)
2503 {
2504 kref_put(&event->kref, __release_event);
2505 }
2506 EXPORT_SYMBOL(ceph_osdc_put_event);
2507
2508 static void __insert_event(struct ceph_osd_client *osdc,
2509 struct ceph_osd_event *new)
2510 {
2511 struct rb_node **p = &osdc->event_tree.rb_node;
2512 struct rb_node *parent = NULL;
2513 struct ceph_osd_event *event = NULL;
2514
2515 while (*p) {
2516 parent = *p;
2517 event = rb_entry(parent, struct ceph_osd_event, node);
2518 if (new->cookie < event->cookie)
2519 p = &(*p)->rb_left;
2520 else if (new->cookie > event->cookie)
2521 p = &(*p)->rb_right;
2522 else
2523 BUG();
2524 }
2525
2526 rb_link_node(&new->node, parent, p);
2527 rb_insert_color(&new->node, &osdc->event_tree);
2528 }
2529
2530 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2531 u64 cookie)
2532 {
2533 struct rb_node **p = &osdc->event_tree.rb_node;
2534 struct rb_node *parent = NULL;
2535 struct ceph_osd_event *event = NULL;
2536
2537 while (*p) {
2538 parent = *p;
2539 event = rb_entry(parent, struct ceph_osd_event, node);
2540 if (cookie < event->cookie)
2541 p = &(*p)->rb_left;
2542 else if (cookie > event->cookie)
2543 p = &(*p)->rb_right;
2544 else
2545 return event;
2546 }
2547 return NULL;
2548 }
2549
2550 static void __remove_event(struct ceph_osd_event *event)
2551 {
2552 struct ceph_osd_client *osdc = event->osdc;
2553
2554 if (!RB_EMPTY_NODE(&event->node)) {
2555 dout("__remove_event removed %p\n", event);
2556 rb_erase(&event->node, &osdc->event_tree);
2557 ceph_osdc_put_event(event);
2558 } else {
2559 dout("__remove_event didn't remove %p\n", event);
2560 }
2561 }
2562
2563 int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2564 void (*event_cb)(u64, u64, u8, void *),
2565 void *data, struct ceph_osd_event **pevent)
2566 {
2567 struct ceph_osd_event *event;
2568
2569 event = kmalloc(sizeof(*event), GFP_NOIO);
2570 if (!event)
2571 return -ENOMEM;
2572
2573 dout("create_event %p\n", event);
2574 event->cb = event_cb;
2575 event->one_shot = 0;
2576 event->data = data;
2577 event->osdc = osdc;
2578 INIT_LIST_HEAD(&event->osd_node);
2579 RB_CLEAR_NODE(&event->node);
2580 kref_init(&event->kref); /* one ref for us */
2581 kref_get(&event->kref); /* one ref for the caller */
2582
2583 spin_lock(&osdc->event_lock);
2584 event->cookie = ++osdc->event_count;
2585 __insert_event(osdc, event);
2586 spin_unlock(&osdc->event_lock);
2587
2588 *pevent = event;
2589 return 0;
2590 }
2591 EXPORT_SYMBOL(ceph_osdc_create_event);
2592
2593 void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2594 {
2595 struct ceph_osd_client *osdc = event->osdc;
2596
2597 dout("cancel_event %p\n", event);
2598 spin_lock(&osdc->event_lock);
2599 __remove_event(event);
2600 spin_unlock(&osdc->event_lock);
2601 ceph_osdc_put_event(event); /* caller's */
2602 }
2603 EXPORT_SYMBOL(ceph_osdc_cancel_event);
2604
2605
2606 static void do_event_work(struct work_struct *work)
2607 {
2608 struct ceph_osd_event_work *event_work =
2609 container_of(work, struct ceph_osd_event_work, work);
2610 struct ceph_osd_event *event = event_work->event;
2611 u64 ver = event_work->ver;
2612 u64 notify_id = event_work->notify_id;
2613 u8 opcode = event_work->opcode;
2614
2615 dout("do_event_work completing %p\n", event);
2616 event->cb(ver, notify_id, opcode, event->data);
2617 dout("do_event_work completed %p\n", event);
2618 ceph_osdc_put_event(event);
2619 kfree(event_work);
2620 }
2621
2622
2623 /*
2624 * Process osd watch notifications
2625 */
2626 static void handle_watch_notify(struct ceph_osd_client *osdc,
2627 struct ceph_msg *msg)
2628 {
2629 void *p, *end;
2630 u8 proto_ver;
2631 u64 cookie, ver, notify_id;
2632 u8 opcode;
2633 struct ceph_osd_event *event;
2634 struct ceph_osd_event_work *event_work;
2635
2636 p = msg->front.iov_base;
2637 end = p + msg->front.iov_len;
2638
2639 ceph_decode_8_safe(&p, end, proto_ver, bad);
2640 ceph_decode_8_safe(&p, end, opcode, bad);
2641 ceph_decode_64_safe(&p, end, cookie, bad);
2642 ceph_decode_64_safe(&p, end, ver, bad);
2643 ceph_decode_64_safe(&p, end, notify_id, bad);
2644
2645 spin_lock(&osdc->event_lock);
2646 event = __find_event(osdc, cookie);
2647 if (event) {
2648 BUG_ON(event->one_shot);
2649 get_event(event);
2650 }
2651 spin_unlock(&osdc->event_lock);
2652 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2653 cookie, ver, event);
2654 if (event) {
2655 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
2656 if (!event_work) {
2657 pr_err("couldn't allocate event_work\n");
2658 ceph_osdc_put_event(event);
2659 return;
2660 }
2661 INIT_WORK(&event_work->work, do_event_work);
2662 event_work->event = event;
2663 event_work->ver = ver;
2664 event_work->notify_id = notify_id;
2665 event_work->opcode = opcode;
2666
2667 queue_work(osdc->notify_wq, &event_work->work);
2668 }
2669
2670 return;
2671
2672 bad:
2673 pr_err("osdc handle_watch_notify corrupt msg\n");
2674 }
2675
2676 /*
2677 * Register request, send initial attempt.
2678 */
2679 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2680 struct ceph_osd_request *req,
2681 bool nofail)
2682 {
2683 int rc;
2684
2685 down_read(&osdc->map_sem);
2686 mutex_lock(&osdc->request_mutex);
2687
2688 rc = __ceph_osdc_start_request(osdc, req, nofail);
2689
2690 mutex_unlock(&osdc->request_mutex);
2691 up_read(&osdc->map_sem);
2692
2693 return rc;
2694 }
2695 EXPORT_SYMBOL(ceph_osdc_start_request);
2696
2697 /*
2698 * Unregister a registered request. The request is not completed (i.e.
2699 * no callbacks or wakeups) - higher layers are supposed to know what
2700 * they are canceling.
2701 */
2702 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2703 {
2704 struct ceph_osd_client *osdc = req->r_osdc;
2705
2706 mutex_lock(&osdc->request_mutex);
2707 if (req->r_linger)
2708 __unregister_linger_request(osdc, req);
2709 __unregister_request(osdc, req);
2710 mutex_unlock(&osdc->request_mutex);
2711
2712 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2713 }
2714 EXPORT_SYMBOL(ceph_osdc_cancel_request);
2715
2716 /*
2717 * wait for a request to complete
2718 */
2719 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2720 struct ceph_osd_request *req)
2721 {
2722 int rc;
2723
2724 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2725
2726 rc = wait_for_completion_interruptible(&req->r_completion);
2727 if (rc < 0) {
2728 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2729 ceph_osdc_cancel_request(req);
2730
2731 /* kludge - need to to wake ceph_osdc_sync() */
2732 complete_all(&req->r_safe_completion);
2733 return rc;
2734 }
2735
2736 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2737 req->r_result);
2738 return req->r_result;
2739 }
2740 EXPORT_SYMBOL(ceph_osdc_wait_request);
2741
2742 /*
2743 * sync - wait for all in-flight requests to flush. avoid starvation.
2744 */
2745 void ceph_osdc_sync(struct ceph_osd_client *osdc)
2746 {
2747 struct ceph_osd_request *req;
2748 u64 last_tid, next_tid = 0;
2749
2750 mutex_lock(&osdc->request_mutex);
2751 last_tid = osdc->last_tid;
2752 while (1) {
2753 req = __lookup_request_ge(osdc, next_tid);
2754 if (!req)
2755 break;
2756 if (req->r_tid > last_tid)
2757 break;
2758
2759 next_tid = req->r_tid + 1;
2760 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2761 continue;
2762
2763 ceph_osdc_get_request(req);
2764 mutex_unlock(&osdc->request_mutex);
2765 dout("sync waiting on tid %llu (last is %llu)\n",
2766 req->r_tid, last_tid);
2767 wait_for_completion(&req->r_safe_completion);
2768 mutex_lock(&osdc->request_mutex);
2769 ceph_osdc_put_request(req);
2770 }
2771 mutex_unlock(&osdc->request_mutex);
2772 dout("sync done (thru tid %llu)\n", last_tid);
2773 }
2774 EXPORT_SYMBOL(ceph_osdc_sync);
2775
2776 /*
2777 * Call all pending notify callbacks - for use after a watch is
2778 * unregistered, to make sure no more callbacks for it will be invoked
2779 */
2780 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2781 {
2782 flush_workqueue(osdc->notify_wq);
2783 }
2784 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2785
2786
2787 /*
2788 * init, shutdown
2789 */
2790 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2791 {
2792 int err;
2793
2794 dout("init\n");
2795 osdc->client = client;
2796 init_rwsem(&osdc->map_sem);
2797 mutex_init(&osdc->request_mutex);
2798 osdc->last_tid = 0;
2799 osdc->osds = RB_ROOT;
2800 INIT_LIST_HEAD(&osdc->osd_lru);
2801 spin_lock_init(&osdc->osd_lru_lock);
2802 osdc->requests = RB_ROOT;
2803 INIT_LIST_HEAD(&osdc->req_lru);
2804 INIT_LIST_HEAD(&osdc->req_unsent);
2805 INIT_LIST_HEAD(&osdc->req_notarget);
2806 INIT_LIST_HEAD(&osdc->req_linger);
2807 osdc->num_requests = 0;
2808 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2809 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2810 spin_lock_init(&osdc->event_lock);
2811 osdc->event_tree = RB_ROOT;
2812 osdc->event_count = 0;
2813
2814 err = -ENOMEM;
2815 osdc->osdmap = ceph_osdmap_alloc();
2816 if (!osdc->osdmap)
2817 goto out;
2818
2819 osdc->req_mempool = mempool_create_slab_pool(10,
2820 ceph_osd_request_cache);
2821 if (!osdc->req_mempool)
2822 goto out_map;
2823
2824 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2825 PAGE_SIZE, 10, true, "osd_op");
2826 if (err < 0)
2827 goto out_mempool;
2828 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2829 PAGE_SIZE, 10, true, "osd_op_reply");
2830 if (err < 0)
2831 goto out_msgpool;
2832
2833 err = -ENOMEM;
2834 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2835 if (!osdc->notify_wq)
2836 goto out_msgpool_reply;
2837
2838 schedule_delayed_work(&osdc->timeout_work,
2839 osdc->client->options->osd_keepalive_timeout);
2840 schedule_delayed_work(&osdc->osds_timeout_work,
2841 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
2842
2843 return 0;
2844
2845 out_msgpool_reply:
2846 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2847 out_msgpool:
2848 ceph_msgpool_destroy(&osdc->msgpool_op);
2849 out_mempool:
2850 mempool_destroy(osdc->req_mempool);
2851 out_map:
2852 ceph_osdmap_destroy(osdc->osdmap);
2853 out:
2854 return err;
2855 }
2856
2857 void ceph_osdc_stop(struct ceph_osd_client *osdc)
2858 {
2859 flush_workqueue(osdc->notify_wq);
2860 destroy_workqueue(osdc->notify_wq);
2861 cancel_delayed_work_sync(&osdc->timeout_work);
2862 cancel_delayed_work_sync(&osdc->osds_timeout_work);
2863
2864 mutex_lock(&osdc->request_mutex);
2865 while (!RB_EMPTY_ROOT(&osdc->osds)) {
2866 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
2867 struct ceph_osd, o_node);
2868 remove_osd(osdc, osd);
2869 }
2870 mutex_unlock(&osdc->request_mutex);
2871
2872 ceph_osdmap_destroy(osdc->osdmap);
2873 mempool_destroy(osdc->req_mempool);
2874 ceph_msgpool_destroy(&osdc->msgpool_op);
2875 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2876 }
2877
2878 /*
2879 * Read some contiguous pages. If we cross a stripe boundary, shorten
2880 * *plen. Return number of bytes read, or error.
2881 */
2882 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2883 struct ceph_vino vino, struct ceph_file_layout *layout,
2884 u64 off, u64 *plen,
2885 u32 truncate_seq, u64 truncate_size,
2886 struct page **pages, int num_pages, int page_align)
2887 {
2888 struct ceph_osd_request *req;
2889 int rc = 0;
2890
2891 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2892 vino.snap, off, *plen);
2893 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
2894 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2895 NULL, truncate_seq, truncate_size,
2896 false);
2897 if (IS_ERR(req))
2898 return PTR_ERR(req);
2899
2900 /* it may be a short read due to an object boundary */
2901 osd_req_op_extent_osd_data_pages(req, 0,
2902 pages, *plen, page_align, false, false);
2903
2904 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
2905 off, *plen, *plen, page_align);
2906
2907 rc = ceph_osdc_start_request(osdc, req, false);
2908 if (!rc)
2909 rc = ceph_osdc_wait_request(osdc, req);
2910
2911 ceph_osdc_put_request(req);
2912 dout("readpages result %d\n", rc);
2913 return rc;
2914 }
2915 EXPORT_SYMBOL(ceph_osdc_readpages);
2916
2917 /*
2918 * do a synchronous write on N pages
2919 */
2920 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2921 struct ceph_file_layout *layout,
2922 struct ceph_snap_context *snapc,
2923 u64 off, u64 len,
2924 u32 truncate_seq, u64 truncate_size,
2925 struct timespec *mtime,
2926 struct page **pages, int num_pages)
2927 {
2928 struct ceph_osd_request *req;
2929 int rc = 0;
2930 int page_align = off & ~PAGE_MASK;
2931
2932 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
2933 CEPH_OSD_OP_WRITE,
2934 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2935 snapc, truncate_seq, truncate_size,
2936 true);
2937 if (IS_ERR(req))
2938 return PTR_ERR(req);
2939
2940 /* it may be a short write due to an object boundary */
2941 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2942 false, false);
2943 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
2944
2945 req->r_mtime = *mtime;
2946 rc = ceph_osdc_start_request(osdc, req, true);
2947 if (!rc)
2948 rc = ceph_osdc_wait_request(osdc, req);
2949
2950 ceph_osdc_put_request(req);
2951 if (rc == 0)
2952 rc = len;
2953 dout("writepages result %d\n", rc);
2954 return rc;
2955 }
2956 EXPORT_SYMBOL(ceph_osdc_writepages);
2957
2958 int ceph_osdc_setup(void)
2959 {
2960 size_t size = sizeof(struct ceph_osd_request) +
2961 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
2962
2963 BUG_ON(ceph_osd_request_cache);
2964 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
2965 0, 0, NULL);
2966
2967 return ceph_osd_request_cache ? 0 : -ENOMEM;
2968 }
2969 EXPORT_SYMBOL(ceph_osdc_setup);
2970
2971 void ceph_osdc_cleanup(void)
2972 {
2973 BUG_ON(!ceph_osd_request_cache);
2974 kmem_cache_destroy(ceph_osd_request_cache);
2975 ceph_osd_request_cache = NULL;
2976 }
2977 EXPORT_SYMBOL(ceph_osdc_cleanup);
2978
2979 /*
2980 * handle incoming message
2981 */
2982 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2983 {
2984 struct ceph_osd *osd = con->private;
2985 struct ceph_osd_client *osdc;
2986 int type = le16_to_cpu(msg->hdr.type);
2987
2988 if (!osd)
2989 goto out;
2990 osdc = osd->o_osdc;
2991
2992 switch (type) {
2993 case CEPH_MSG_OSD_MAP:
2994 ceph_osdc_handle_map(osdc, msg);
2995 break;
2996 case CEPH_MSG_OSD_OPREPLY:
2997 handle_reply(osdc, msg);
2998 break;
2999 case CEPH_MSG_WATCH_NOTIFY:
3000 handle_watch_notify(osdc, msg);
3001 break;
3002
3003 default:
3004 pr_err("received unknown message type %d %s\n", type,
3005 ceph_msg_type_name(type));
3006 }
3007 out:
3008 ceph_msg_put(msg);
3009 }
3010
3011 /*
3012 * Lookup and return message for incoming reply. Don't try to do
3013 * anything about a larger than preallocated data portion of the
3014 * message at the moment - for now, just skip the message.
3015 */
3016 static struct ceph_msg *get_reply(struct ceph_connection *con,
3017 struct ceph_msg_header *hdr,
3018 int *skip)
3019 {
3020 struct ceph_osd *osd = con->private;
3021 struct ceph_osd_client *osdc = osd->o_osdc;
3022 struct ceph_msg *m;
3023 struct ceph_osd_request *req;
3024 int front_len = le32_to_cpu(hdr->front_len);
3025 int data_len = le32_to_cpu(hdr->data_len);
3026 u64 tid;
3027
3028 tid = le64_to_cpu(hdr->tid);
3029 mutex_lock(&osdc->request_mutex);
3030 req = lookup_request(&osdc->requests, tid);
3031 if (!req) {
3032 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
3033 osd->o_osd, tid);
3034 m = NULL;
3035 *skip = 1;
3036 goto out;
3037 }
3038
3039 ceph_msg_revoke_incoming(req->r_reply);
3040
3041 if (front_len > req->r_reply->front_alloc_len) {
3042 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
3043 __func__, osd->o_osd, req->r_tid, front_len,
3044 req->r_reply->front_alloc_len);
3045 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
3046 false);
3047 if (!m)
3048 goto out;
3049 ceph_msg_put(req->r_reply);
3050 req->r_reply = m;
3051 }
3052
3053 if (data_len > req->r_reply->data_length) {
3054 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
3055 __func__, osd->o_osd, req->r_tid, data_len,
3056 req->r_reply->data_length);
3057 m = NULL;
3058 *skip = 1;
3059 goto out;
3060 }
3061
3062 m = ceph_msg_get(req->r_reply);
3063 dout("get_reply tid %lld %p\n", tid, m);
3064
3065 out:
3066 mutex_unlock(&osdc->request_mutex);
3067 return m;
3068 }
3069
3070 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
3071 struct ceph_msg_header *hdr,
3072 int *skip)
3073 {
3074 struct ceph_osd *osd = con->private;
3075 int type = le16_to_cpu(hdr->type);
3076 int front = le32_to_cpu(hdr->front_len);
3077
3078 *skip = 0;
3079 switch (type) {
3080 case CEPH_MSG_OSD_MAP:
3081 case CEPH_MSG_WATCH_NOTIFY:
3082 return ceph_msg_new(type, front, GFP_NOFS, false);
3083 case CEPH_MSG_OSD_OPREPLY:
3084 return get_reply(con, hdr, skip);
3085 default:
3086 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
3087 osd->o_osd);
3088 *skip = 1;
3089 return NULL;
3090 }
3091 }
3092
3093 /*
3094 * Wrappers to refcount containing ceph_osd struct
3095 */
3096 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
3097 {
3098 struct ceph_osd *osd = con->private;
3099 if (get_osd(osd))
3100 return con;
3101 return NULL;
3102 }
3103
3104 static void put_osd_con(struct ceph_connection *con)
3105 {
3106 struct ceph_osd *osd = con->private;
3107 put_osd(osd);
3108 }
3109
3110 /*
3111 * authentication
3112 */
3113 /*
3114 * Note: returned pointer is the address of a structure that's
3115 * managed separately. Caller must *not* attempt to free it.
3116 */
3117 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
3118 int *proto, int force_new)
3119 {
3120 struct ceph_osd *o = con->private;
3121 struct ceph_osd_client *osdc = o->o_osdc;
3122 struct ceph_auth_client *ac = osdc->client->monc.auth;
3123 struct ceph_auth_handshake *auth = &o->o_auth;
3124
3125 if (force_new && auth->authorizer) {
3126 ceph_auth_destroy_authorizer(auth->authorizer);
3127 auth->authorizer = NULL;
3128 }
3129 if (!auth->authorizer) {
3130 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
3131 auth);
3132 if (ret)
3133 return ERR_PTR(ret);
3134 } else {
3135 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
3136 auth);
3137 if (ret)
3138 return ERR_PTR(ret);
3139 }
3140 *proto = ac->protocol;
3141
3142 return auth;
3143 }
3144
3145
3146 static int verify_authorizer_reply(struct ceph_connection *con, int len)
3147 {
3148 struct ceph_osd *o = con->private;
3149 struct ceph_osd_client *osdc = o->o_osdc;
3150 struct ceph_auth_client *ac = osdc->client->monc.auth;
3151
3152 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
3153 }
3154
3155 static int invalidate_authorizer(struct ceph_connection *con)
3156 {
3157 struct ceph_osd *o = con->private;
3158 struct ceph_osd_client *osdc = o->o_osdc;
3159 struct ceph_auth_client *ac = osdc->client->monc.auth;
3160
3161 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
3162 return ceph_monc_validate_auth(&osdc->client->monc);
3163 }
3164
3165 static int osd_sign_message(struct ceph_msg *msg)
3166 {
3167 struct ceph_osd *o = msg->con->private;
3168 struct ceph_auth_handshake *auth = &o->o_auth;
3169
3170 return ceph_auth_sign_message(auth, msg);
3171 }
3172
3173 static int osd_check_message_signature(struct ceph_msg *msg)
3174 {
3175 struct ceph_osd *o = msg->con->private;
3176 struct ceph_auth_handshake *auth = &o->o_auth;
3177
3178 return ceph_auth_check_message_signature(auth, msg);
3179 }
3180
3181 static const struct ceph_connection_operations osd_con_ops = {
3182 .get = get_osd_con,
3183 .put = put_osd_con,
3184 .dispatch = dispatch,
3185 .get_authorizer = get_authorizer,
3186 .verify_authorizer_reply = verify_authorizer_reply,
3187 .invalidate_authorizer = invalidate_authorizer,
3188 .alloc_msg = alloc_msg,
3189 .sign_message = osd_sign_message,
3190 .check_message_signature = osd_check_message_signature,
3191 .fault = osd_reset,
3192 };
Linux kernel - Deliverables
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