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ceph: punch hole support
[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_OP_FRONT_LEN 4096
23 #define OSD_OPREPLY_FRONT_LEN 512
24
25 static struct kmem_cache *ceph_osd_request_cache;
26
27 static const struct ceph_connection_operations osd_con_ops;
28
29 static void __send_queued(struct ceph_osd_client *osdc);
30 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
31 static void __register_request(struct ceph_osd_client *osdc,
32 struct ceph_osd_request *req);
33 static void __unregister_linger_request(struct ceph_osd_client *osdc,
34 struct ceph_osd_request *req);
35 static void __send_request(struct ceph_osd_client *osdc,
36 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 BUG_ON(whch >= (oreq)->r_num_ops); \
123 &(oreq)->r_ops[whch].typ.fld; \
124 })
125
126 static struct ceph_osd_data *
127 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
128 {
129 BUG_ON(which >= osd_req->r_num_ops);
130
131 return &osd_req->r_ops[which].raw_data_in;
132 }
133
134 struct ceph_osd_data *
135 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
136 unsigned int which)
137 {
138 return osd_req_op_data(osd_req, which, extent, osd_data);
139 }
140 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
141
142 struct ceph_osd_data *
143 osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
144 unsigned int which)
145 {
146 return osd_req_op_data(osd_req, which, cls, response_data);
147 }
148 EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
149
150 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
151 unsigned int which, struct page **pages,
152 u64 length, u32 alignment,
153 bool pages_from_pool, bool own_pages)
154 {
155 struct ceph_osd_data *osd_data;
156
157 osd_data = osd_req_op_raw_data_in(osd_req, which);
158 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
159 pages_from_pool, own_pages);
160 }
161 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
162
163 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
164 unsigned int which, struct page **pages,
165 u64 length, u32 alignment,
166 bool pages_from_pool, bool own_pages)
167 {
168 struct ceph_osd_data *osd_data;
169
170 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
171 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
172 pages_from_pool, own_pages);
173 }
174 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
175
176 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
177 unsigned int which, struct ceph_pagelist *pagelist)
178 {
179 struct ceph_osd_data *osd_data;
180
181 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
182 ceph_osd_data_pagelist_init(osd_data, pagelist);
183 }
184 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
185
186 #ifdef CONFIG_BLOCK
187 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
188 unsigned int which, struct bio *bio, size_t bio_length)
189 {
190 struct ceph_osd_data *osd_data;
191
192 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
193 ceph_osd_data_bio_init(osd_data, bio, bio_length);
194 }
195 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
196 #endif /* CONFIG_BLOCK */
197
198 static void osd_req_op_cls_request_info_pagelist(
199 struct ceph_osd_request *osd_req,
200 unsigned int which, struct ceph_pagelist *pagelist)
201 {
202 struct ceph_osd_data *osd_data;
203
204 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
205 ceph_osd_data_pagelist_init(osd_data, pagelist);
206 }
207
208 void osd_req_op_cls_request_data_pagelist(
209 struct ceph_osd_request *osd_req,
210 unsigned int which, struct ceph_pagelist *pagelist)
211 {
212 struct ceph_osd_data *osd_data;
213
214 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
215 ceph_osd_data_pagelist_init(osd_data, pagelist);
216 }
217 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
218
219 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
220 unsigned int which, struct page **pages, u64 length,
221 u32 alignment, bool pages_from_pool, bool own_pages)
222 {
223 struct ceph_osd_data *osd_data;
224
225 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
226 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
227 pages_from_pool, own_pages);
228 }
229 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
230
231 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
232 unsigned int which, struct page **pages, u64 length,
233 u32 alignment, bool pages_from_pool, bool own_pages)
234 {
235 struct ceph_osd_data *osd_data;
236
237 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
238 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
239 pages_from_pool, own_pages);
240 }
241 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
242
243 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
244 {
245 switch (osd_data->type) {
246 case CEPH_OSD_DATA_TYPE_NONE:
247 return 0;
248 case CEPH_OSD_DATA_TYPE_PAGES:
249 return osd_data->length;
250 case CEPH_OSD_DATA_TYPE_PAGELIST:
251 return (u64)osd_data->pagelist->length;
252 #ifdef CONFIG_BLOCK
253 case CEPH_OSD_DATA_TYPE_BIO:
254 return (u64)osd_data->bio_length;
255 #endif /* CONFIG_BLOCK */
256 default:
257 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
258 return 0;
259 }
260 }
261
262 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
263 {
264 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
265 int num_pages;
266
267 num_pages = calc_pages_for((u64)osd_data->alignment,
268 (u64)osd_data->length);
269 ceph_release_page_vector(osd_data->pages, num_pages);
270 }
271 ceph_osd_data_init(osd_data);
272 }
273
274 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
275 unsigned int which)
276 {
277 struct ceph_osd_req_op *op;
278
279 BUG_ON(which >= osd_req->r_num_ops);
280 op = &osd_req->r_ops[which];
281
282 switch (op->op) {
283 case CEPH_OSD_OP_READ:
284 case CEPH_OSD_OP_WRITE:
285 ceph_osd_data_release(&op->extent.osd_data);
286 break;
287 case CEPH_OSD_OP_CALL:
288 ceph_osd_data_release(&op->cls.request_info);
289 ceph_osd_data_release(&op->cls.request_data);
290 ceph_osd_data_release(&op->cls.response_data);
291 break;
292 default:
293 break;
294 }
295 }
296
297 /*
298 * requests
299 */
300 void ceph_osdc_release_request(struct kref *kref)
301 {
302 struct ceph_osd_request *req;
303 unsigned int which;
304
305 req = container_of(kref, struct ceph_osd_request, r_kref);
306 if (req->r_request)
307 ceph_msg_put(req->r_request);
308 if (req->r_reply) {
309 ceph_msg_revoke_incoming(req->r_reply);
310 ceph_msg_put(req->r_reply);
311 }
312
313 for (which = 0; which < req->r_num_ops; which++)
314 osd_req_op_data_release(req, which);
315
316 ceph_put_snap_context(req->r_snapc);
317 if (req->r_mempool)
318 mempool_free(req, req->r_osdc->req_mempool);
319 else
320 kmem_cache_free(ceph_osd_request_cache, req);
321
322 }
323 EXPORT_SYMBOL(ceph_osdc_release_request);
324
325 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
326 struct ceph_snap_context *snapc,
327 unsigned int num_ops,
328 bool use_mempool,
329 gfp_t gfp_flags)
330 {
331 struct ceph_osd_request *req;
332 struct ceph_msg *msg;
333 size_t msg_size;
334
335 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
336 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
337
338 msg_size = 4 + 4 + 8 + 8 + 4+8;
339 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
340 msg_size += 1 + 8 + 4 + 4; /* pg_t */
341 msg_size += 4 + MAX_OBJ_NAME_SIZE;
342 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
343 msg_size += 8; /* snapid */
344 msg_size += 8; /* snap_seq */
345 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
346 msg_size += 4;
347
348 if (use_mempool) {
349 req = mempool_alloc(osdc->req_mempool, gfp_flags);
350 memset(req, 0, sizeof(*req));
351 } else {
352 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
353 }
354 if (req == NULL)
355 return NULL;
356
357 req->r_osdc = osdc;
358 req->r_mempool = use_mempool;
359 req->r_num_ops = num_ops;
360
361 kref_init(&req->r_kref);
362 init_completion(&req->r_completion);
363 init_completion(&req->r_safe_completion);
364 RB_CLEAR_NODE(&req->r_node);
365 INIT_LIST_HEAD(&req->r_unsafe_item);
366 INIT_LIST_HEAD(&req->r_linger_item);
367 INIT_LIST_HEAD(&req->r_linger_osd);
368 INIT_LIST_HEAD(&req->r_req_lru_item);
369 INIT_LIST_HEAD(&req->r_osd_item);
370
371 /* create reply message */
372 if (use_mempool)
373 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
374 else
375 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
376 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
377 if (!msg) {
378 ceph_osdc_put_request(req);
379 return NULL;
380 }
381 req->r_reply = msg;
382
383 /* create request message; allow space for oid */
384 if (use_mempool)
385 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
386 else
387 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
388 if (!msg) {
389 ceph_osdc_put_request(req);
390 return NULL;
391 }
392
393 memset(msg->front.iov_base, 0, msg->front.iov_len);
394
395 req->r_request = msg;
396
397 return req;
398 }
399 EXPORT_SYMBOL(ceph_osdc_alloc_request);
400
401 static bool osd_req_opcode_valid(u16 opcode)
402 {
403 switch (opcode) {
404 case CEPH_OSD_OP_READ:
405 case CEPH_OSD_OP_STAT:
406 case CEPH_OSD_OP_MAPEXT:
407 case CEPH_OSD_OP_MASKTRUNC:
408 case CEPH_OSD_OP_SPARSE_READ:
409 case CEPH_OSD_OP_NOTIFY:
410 case CEPH_OSD_OP_NOTIFY_ACK:
411 case CEPH_OSD_OP_ASSERT_VER:
412 case CEPH_OSD_OP_WRITE:
413 case CEPH_OSD_OP_WRITEFULL:
414 case CEPH_OSD_OP_TRUNCATE:
415 case CEPH_OSD_OP_ZERO:
416 case CEPH_OSD_OP_DELETE:
417 case CEPH_OSD_OP_APPEND:
418 case CEPH_OSD_OP_STARTSYNC:
419 case CEPH_OSD_OP_SETTRUNC:
420 case CEPH_OSD_OP_TRIMTRUNC:
421 case CEPH_OSD_OP_TMAPUP:
422 case CEPH_OSD_OP_TMAPPUT:
423 case CEPH_OSD_OP_TMAPGET:
424 case CEPH_OSD_OP_CREATE:
425 case CEPH_OSD_OP_ROLLBACK:
426 case CEPH_OSD_OP_WATCH:
427 case CEPH_OSD_OP_OMAPGETKEYS:
428 case CEPH_OSD_OP_OMAPGETVALS:
429 case CEPH_OSD_OP_OMAPGETHEADER:
430 case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
431 case CEPH_OSD_OP_OMAPSETVALS:
432 case CEPH_OSD_OP_OMAPSETHEADER:
433 case CEPH_OSD_OP_OMAPCLEAR:
434 case CEPH_OSD_OP_OMAPRMKEYS:
435 case CEPH_OSD_OP_OMAP_CMP:
436 case CEPH_OSD_OP_CLONERANGE:
437 case CEPH_OSD_OP_ASSERT_SRC_VERSION:
438 case CEPH_OSD_OP_SRC_CMPXATTR:
439 case CEPH_OSD_OP_GETXATTR:
440 case CEPH_OSD_OP_GETXATTRS:
441 case CEPH_OSD_OP_CMPXATTR:
442 case CEPH_OSD_OP_SETXATTR:
443 case CEPH_OSD_OP_SETXATTRS:
444 case CEPH_OSD_OP_RESETXATTRS:
445 case CEPH_OSD_OP_RMXATTR:
446 case CEPH_OSD_OP_PULL:
447 case CEPH_OSD_OP_PUSH:
448 case CEPH_OSD_OP_BALANCEREADS:
449 case CEPH_OSD_OP_UNBALANCEREADS:
450 case CEPH_OSD_OP_SCRUB:
451 case CEPH_OSD_OP_SCRUB_RESERVE:
452 case CEPH_OSD_OP_SCRUB_UNRESERVE:
453 case CEPH_OSD_OP_SCRUB_STOP:
454 case CEPH_OSD_OP_SCRUB_MAP:
455 case CEPH_OSD_OP_WRLOCK:
456 case CEPH_OSD_OP_WRUNLOCK:
457 case CEPH_OSD_OP_RDLOCK:
458 case CEPH_OSD_OP_RDUNLOCK:
459 case CEPH_OSD_OP_UPLOCK:
460 case CEPH_OSD_OP_DNLOCK:
461 case CEPH_OSD_OP_CALL:
462 case CEPH_OSD_OP_PGLS:
463 case CEPH_OSD_OP_PGLS_FILTER:
464 return true;
465 default:
466 return false;
467 }
468 }
469
470 /*
471 * This is an osd op init function for opcodes that have no data or
472 * other information associated with them. It also serves as a
473 * common init routine for all the other init functions, below.
474 */
475 static struct ceph_osd_req_op *
476 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
477 u16 opcode)
478 {
479 struct ceph_osd_req_op *op;
480
481 BUG_ON(which >= osd_req->r_num_ops);
482 BUG_ON(!osd_req_opcode_valid(opcode));
483
484 op = &osd_req->r_ops[which];
485 memset(op, 0, sizeof (*op));
486 op->op = opcode;
487
488 return op;
489 }
490
491 void osd_req_op_init(struct ceph_osd_request *osd_req,
492 unsigned int which, u16 opcode)
493 {
494 (void)_osd_req_op_init(osd_req, which, opcode);
495 }
496 EXPORT_SYMBOL(osd_req_op_init);
497
498 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
499 unsigned int which, u16 opcode,
500 u64 offset, u64 length,
501 u64 truncate_size, u32 truncate_seq)
502 {
503 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
504 size_t payload_len = 0;
505
506 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
507 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
508 opcode != CEPH_OSD_OP_TRUNCATE);
509
510 op->extent.offset = offset;
511 op->extent.length = length;
512 op->extent.truncate_size = truncate_size;
513 op->extent.truncate_seq = truncate_seq;
514 if (opcode == CEPH_OSD_OP_WRITE)
515 payload_len += length;
516
517 op->payload_len = payload_len;
518 }
519 EXPORT_SYMBOL(osd_req_op_extent_init);
520
521 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
522 unsigned int which, u64 length)
523 {
524 struct ceph_osd_req_op *op;
525 u64 previous;
526
527 BUG_ON(which >= osd_req->r_num_ops);
528 op = &osd_req->r_ops[which];
529 previous = op->extent.length;
530
531 if (length == previous)
532 return; /* Nothing to do */
533 BUG_ON(length > previous);
534
535 op->extent.length = length;
536 op->payload_len -= previous - length;
537 }
538 EXPORT_SYMBOL(osd_req_op_extent_update);
539
540 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
541 u16 opcode, const char *class, const char *method)
542 {
543 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
544 struct ceph_pagelist *pagelist;
545 size_t payload_len = 0;
546 size_t size;
547
548 BUG_ON(opcode != CEPH_OSD_OP_CALL);
549
550 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
551 BUG_ON(!pagelist);
552 ceph_pagelist_init(pagelist);
553
554 op->cls.class_name = class;
555 size = strlen(class);
556 BUG_ON(size > (size_t) U8_MAX);
557 op->cls.class_len = size;
558 ceph_pagelist_append(pagelist, class, size);
559 payload_len += size;
560
561 op->cls.method_name = method;
562 size = strlen(method);
563 BUG_ON(size > (size_t) U8_MAX);
564 op->cls.method_len = size;
565 ceph_pagelist_append(pagelist, method, size);
566 payload_len += size;
567
568 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
569
570 op->cls.argc = 0; /* currently unused */
571
572 op->payload_len = payload_len;
573 }
574 EXPORT_SYMBOL(osd_req_op_cls_init);
575
576 void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
577 unsigned int which, u16 opcode,
578 u64 cookie, u64 version, int flag)
579 {
580 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
581
582 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
583
584 op->watch.cookie = cookie;
585 op->watch.ver = version;
586 if (opcode == CEPH_OSD_OP_WATCH && flag)
587 op->watch.flag = (u8)1;
588 }
589 EXPORT_SYMBOL(osd_req_op_watch_init);
590
591 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
592 struct ceph_osd_data *osd_data)
593 {
594 u64 length = ceph_osd_data_length(osd_data);
595
596 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
597 BUG_ON(length > (u64) SIZE_MAX);
598 if (length)
599 ceph_msg_data_add_pages(msg, osd_data->pages,
600 length, osd_data->alignment);
601 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
602 BUG_ON(!length);
603 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
604 #ifdef CONFIG_BLOCK
605 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
606 ceph_msg_data_add_bio(msg, osd_data->bio, length);
607 #endif
608 } else {
609 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
610 }
611 }
612
613 static u64 osd_req_encode_op(struct ceph_osd_request *req,
614 struct ceph_osd_op *dst, unsigned int which)
615 {
616 struct ceph_osd_req_op *src;
617 struct ceph_osd_data *osd_data;
618 u64 request_data_len = 0;
619 u64 data_length;
620
621 BUG_ON(which >= req->r_num_ops);
622 src = &req->r_ops[which];
623 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
624 pr_err("unrecognized osd opcode %d\n", src->op);
625
626 return 0;
627 }
628
629 switch (src->op) {
630 case CEPH_OSD_OP_STAT:
631 osd_data = &src->raw_data_in;
632 ceph_osdc_msg_data_add(req->r_reply, osd_data);
633 break;
634 case CEPH_OSD_OP_READ:
635 case CEPH_OSD_OP_WRITE:
636 case CEPH_OSD_OP_ZERO:
637 case CEPH_OSD_OP_DELETE:
638 case CEPH_OSD_OP_TRUNCATE:
639 if (src->op == CEPH_OSD_OP_WRITE)
640 request_data_len = src->extent.length;
641 dst->extent.offset = cpu_to_le64(src->extent.offset);
642 dst->extent.length = cpu_to_le64(src->extent.length);
643 dst->extent.truncate_size =
644 cpu_to_le64(src->extent.truncate_size);
645 dst->extent.truncate_seq =
646 cpu_to_le32(src->extent.truncate_seq);
647 osd_data = &src->extent.osd_data;
648 if (src->op == CEPH_OSD_OP_WRITE)
649 ceph_osdc_msg_data_add(req->r_request, osd_data);
650 else
651 ceph_osdc_msg_data_add(req->r_reply, osd_data);
652 break;
653 case CEPH_OSD_OP_CALL:
654 dst->cls.class_len = src->cls.class_len;
655 dst->cls.method_len = src->cls.method_len;
656 osd_data = &src->cls.request_info;
657 ceph_osdc_msg_data_add(req->r_request, osd_data);
658 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
659 request_data_len = osd_data->pagelist->length;
660
661 osd_data = &src->cls.request_data;
662 data_length = ceph_osd_data_length(osd_data);
663 if (data_length) {
664 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
665 dst->cls.indata_len = cpu_to_le32(data_length);
666 ceph_osdc_msg_data_add(req->r_request, osd_data);
667 src->payload_len += data_length;
668 request_data_len += data_length;
669 }
670 osd_data = &src->cls.response_data;
671 ceph_osdc_msg_data_add(req->r_reply, osd_data);
672 break;
673 case CEPH_OSD_OP_STARTSYNC:
674 break;
675 case CEPH_OSD_OP_NOTIFY_ACK:
676 case CEPH_OSD_OP_WATCH:
677 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
678 dst->watch.ver = cpu_to_le64(src->watch.ver);
679 dst->watch.flag = src->watch.flag;
680 break;
681 default:
682 pr_err("unsupported osd opcode %s\n",
683 ceph_osd_op_name(src->op));
684 WARN_ON(1);
685
686 return 0;
687 }
688 dst->op = cpu_to_le16(src->op);
689 dst->payload_len = cpu_to_le32(src->payload_len);
690
691 return request_data_len;
692 }
693
694 /*
695 * build new request AND message, calculate layout, and adjust file
696 * extent as needed.
697 *
698 * if the file was recently truncated, we include information about its
699 * old and new size so that the object can be updated appropriately. (we
700 * avoid synchronously deleting truncated objects because it's slow.)
701 *
702 * if @do_sync, include a 'startsync' command so that the osd will flush
703 * data quickly.
704 */
705 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
706 struct ceph_file_layout *layout,
707 struct ceph_vino vino,
708 u64 off, u64 *plen, int num_ops,
709 int opcode, int flags,
710 struct ceph_snap_context *snapc,
711 u32 truncate_seq,
712 u64 truncate_size,
713 bool use_mempool)
714 {
715 struct ceph_osd_request *req;
716 u64 objnum = 0;
717 u64 objoff = 0;
718 u64 objlen = 0;
719 u32 object_size;
720 u64 object_base;
721 int r;
722
723 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
724 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
725 opcode != CEPH_OSD_OP_TRUNCATE);
726
727 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
728 GFP_NOFS);
729 if (!req)
730 return ERR_PTR(-ENOMEM);
731
732 req->r_flags = flags;
733
734 /* calculate max write size */
735 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
736 if (r < 0) {
737 ceph_osdc_put_request(req);
738 return ERR_PTR(r);
739 }
740
741 object_size = le32_to_cpu(layout->fl_object_size);
742 object_base = off - objoff;
743 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
744 if (truncate_size <= object_base) {
745 truncate_size = 0;
746 } else {
747 truncate_size -= object_base;
748 if (truncate_size > object_size)
749 truncate_size = object_size;
750 }
751 }
752
753 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
754 truncate_size, truncate_seq);
755
756 /*
757 * A second op in the ops array means the caller wants to
758 * also issue a include a 'startsync' command so that the
759 * osd will flush data quickly.
760 */
761 if (num_ops > 1)
762 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
763
764 req->r_file_layout = *layout; /* keep a copy */
765
766 snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
767 vino.ino, objnum);
768 req->r_oid_len = strlen(req->r_oid);
769
770 return req;
771 }
772 EXPORT_SYMBOL(ceph_osdc_new_request);
773
774 /*
775 * We keep osd requests in an rbtree, sorted by ->r_tid.
776 */
777 static void __insert_request(struct ceph_osd_client *osdc,
778 struct ceph_osd_request *new)
779 {
780 struct rb_node **p = &osdc->requests.rb_node;
781 struct rb_node *parent = NULL;
782 struct ceph_osd_request *req = NULL;
783
784 while (*p) {
785 parent = *p;
786 req = rb_entry(parent, struct ceph_osd_request, r_node);
787 if (new->r_tid < req->r_tid)
788 p = &(*p)->rb_left;
789 else if (new->r_tid > req->r_tid)
790 p = &(*p)->rb_right;
791 else
792 BUG();
793 }
794
795 rb_link_node(&new->r_node, parent, p);
796 rb_insert_color(&new->r_node, &osdc->requests);
797 }
798
799 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
800 u64 tid)
801 {
802 struct ceph_osd_request *req;
803 struct rb_node *n = osdc->requests.rb_node;
804
805 while (n) {
806 req = rb_entry(n, struct ceph_osd_request, r_node);
807 if (tid < req->r_tid)
808 n = n->rb_left;
809 else if (tid > req->r_tid)
810 n = n->rb_right;
811 else
812 return req;
813 }
814 return NULL;
815 }
816
817 static struct ceph_osd_request *
818 __lookup_request_ge(struct ceph_osd_client *osdc,
819 u64 tid)
820 {
821 struct ceph_osd_request *req;
822 struct rb_node *n = osdc->requests.rb_node;
823
824 while (n) {
825 req = rb_entry(n, struct ceph_osd_request, r_node);
826 if (tid < req->r_tid) {
827 if (!n->rb_left)
828 return req;
829 n = n->rb_left;
830 } else if (tid > req->r_tid) {
831 n = n->rb_right;
832 } else {
833 return req;
834 }
835 }
836 return NULL;
837 }
838
839 /*
840 * Resubmit requests pending on the given osd.
841 */
842 static void __kick_osd_requests(struct ceph_osd_client *osdc,
843 struct ceph_osd *osd)
844 {
845 struct ceph_osd_request *req, *nreq;
846 LIST_HEAD(resend);
847 int err;
848
849 dout("__kick_osd_requests osd%d\n", osd->o_osd);
850 err = __reset_osd(osdc, osd);
851 if (err)
852 return;
853 /*
854 * Build up a list of requests to resend by traversing the
855 * osd's list of requests. Requests for a given object are
856 * sent in tid order, and that is also the order they're
857 * kept on this list. Therefore all requests that are in
858 * flight will be found first, followed by all requests that
859 * have not yet been sent. And to resend requests while
860 * preserving this order we will want to put any sent
861 * requests back on the front of the osd client's unsent
862 * list.
863 *
864 * So we build a separate ordered list of already-sent
865 * requests for the affected osd and splice it onto the
866 * front of the osd client's unsent list. Once we've seen a
867 * request that has not yet been sent we're done. Those
868 * requests are already sitting right where they belong.
869 */
870 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
871 if (!req->r_sent)
872 break;
873 list_move_tail(&req->r_req_lru_item, &resend);
874 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
875 osd->o_osd);
876 if (!req->r_linger)
877 req->r_flags |= CEPH_OSD_FLAG_RETRY;
878 }
879 list_splice(&resend, &osdc->req_unsent);
880
881 /*
882 * Linger requests are re-registered before sending, which
883 * sets up a new tid for each. We add them to the unsent
884 * list at the end to keep things in tid order.
885 */
886 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
887 r_linger_osd) {
888 /*
889 * reregister request prior to unregistering linger so
890 * that r_osd is preserved.
891 */
892 BUG_ON(!list_empty(&req->r_req_lru_item));
893 __register_request(osdc, req);
894 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
895 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
896 __unregister_linger_request(osdc, req);
897 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
898 osd->o_osd);
899 }
900 }
901
902 /*
903 * If the osd connection drops, we need to resubmit all requests.
904 */
905 static void osd_reset(struct ceph_connection *con)
906 {
907 struct ceph_osd *osd = con->private;
908 struct ceph_osd_client *osdc;
909
910 if (!osd)
911 return;
912 dout("osd_reset osd%d\n", osd->o_osd);
913 osdc = osd->o_osdc;
914 down_read(&osdc->map_sem);
915 mutex_lock(&osdc->request_mutex);
916 __kick_osd_requests(osdc, osd);
917 __send_queued(osdc);
918 mutex_unlock(&osdc->request_mutex);
919 up_read(&osdc->map_sem);
920 }
921
922 /*
923 * Track open sessions with osds.
924 */
925 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
926 {
927 struct ceph_osd *osd;
928
929 osd = kzalloc(sizeof(*osd), GFP_NOFS);
930 if (!osd)
931 return NULL;
932
933 atomic_set(&osd->o_ref, 1);
934 osd->o_osdc = osdc;
935 osd->o_osd = onum;
936 RB_CLEAR_NODE(&osd->o_node);
937 INIT_LIST_HEAD(&osd->o_requests);
938 INIT_LIST_HEAD(&osd->o_linger_requests);
939 INIT_LIST_HEAD(&osd->o_osd_lru);
940 osd->o_incarnation = 1;
941
942 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
943
944 INIT_LIST_HEAD(&osd->o_keepalive_item);
945 return osd;
946 }
947
948 static struct ceph_osd *get_osd(struct ceph_osd *osd)
949 {
950 if (atomic_inc_not_zero(&osd->o_ref)) {
951 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
952 atomic_read(&osd->o_ref));
953 return osd;
954 } else {
955 dout("get_osd %p FAIL\n", osd);
956 return NULL;
957 }
958 }
959
960 static void put_osd(struct ceph_osd *osd)
961 {
962 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
963 atomic_read(&osd->o_ref) - 1);
964 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
965 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
966
967 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
968 kfree(osd);
969 }
970 }
971
972 /*
973 * remove an osd from our map
974 */
975 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
976 {
977 dout("__remove_osd %p\n", osd);
978 BUG_ON(!list_empty(&osd->o_requests));
979 rb_erase(&osd->o_node, &osdc->osds);
980 list_del_init(&osd->o_osd_lru);
981 ceph_con_close(&osd->o_con);
982 put_osd(osd);
983 }
984
985 static void remove_all_osds(struct ceph_osd_client *osdc)
986 {
987 dout("%s %p\n", __func__, osdc);
988 mutex_lock(&osdc->request_mutex);
989 while (!RB_EMPTY_ROOT(&osdc->osds)) {
990 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
991 struct ceph_osd, o_node);
992 __remove_osd(osdc, osd);
993 }
994 mutex_unlock(&osdc->request_mutex);
995 }
996
997 static void __move_osd_to_lru(struct ceph_osd_client *osdc,
998 struct ceph_osd *osd)
999 {
1000 dout("__move_osd_to_lru %p\n", osd);
1001 BUG_ON(!list_empty(&osd->o_osd_lru));
1002 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1003 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
1004 }
1005
1006 static void __remove_osd_from_lru(struct ceph_osd *osd)
1007 {
1008 dout("__remove_osd_from_lru %p\n", osd);
1009 if (!list_empty(&osd->o_osd_lru))
1010 list_del_init(&osd->o_osd_lru);
1011 }
1012
1013 static void remove_old_osds(struct ceph_osd_client *osdc)
1014 {
1015 struct ceph_osd *osd, *nosd;
1016
1017 dout("__remove_old_osds %p\n", osdc);
1018 mutex_lock(&osdc->request_mutex);
1019 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1020 if (time_before(jiffies, osd->lru_ttl))
1021 break;
1022 __remove_osd(osdc, osd);
1023 }
1024 mutex_unlock(&osdc->request_mutex);
1025 }
1026
1027 /*
1028 * reset osd connect
1029 */
1030 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1031 {
1032 struct ceph_entity_addr *peer_addr;
1033
1034 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1035 if (list_empty(&osd->o_requests) &&
1036 list_empty(&osd->o_linger_requests)) {
1037 __remove_osd(osdc, osd);
1038
1039 return -ENODEV;
1040 }
1041
1042 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1043 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1044 !ceph_con_opened(&osd->o_con)) {
1045 struct ceph_osd_request *req;
1046
1047 dout(" osd addr hasn't changed and connection never opened,"
1048 " letting msgr retry");
1049 /* touch each r_stamp for handle_timeout()'s benfit */
1050 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1051 req->r_stamp = jiffies;
1052
1053 return -EAGAIN;
1054 }
1055
1056 ceph_con_close(&osd->o_con);
1057 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1058 osd->o_incarnation++;
1059
1060 return 0;
1061 }
1062
1063 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1064 {
1065 struct rb_node **p = &osdc->osds.rb_node;
1066 struct rb_node *parent = NULL;
1067 struct ceph_osd *osd = NULL;
1068
1069 dout("__insert_osd %p osd%d\n", new, new->o_osd);
1070 while (*p) {
1071 parent = *p;
1072 osd = rb_entry(parent, struct ceph_osd, o_node);
1073 if (new->o_osd < osd->o_osd)
1074 p = &(*p)->rb_left;
1075 else if (new->o_osd > osd->o_osd)
1076 p = &(*p)->rb_right;
1077 else
1078 BUG();
1079 }
1080
1081 rb_link_node(&new->o_node, parent, p);
1082 rb_insert_color(&new->o_node, &osdc->osds);
1083 }
1084
1085 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1086 {
1087 struct ceph_osd *osd;
1088 struct rb_node *n = osdc->osds.rb_node;
1089
1090 while (n) {
1091 osd = rb_entry(n, struct ceph_osd, o_node);
1092 if (o < osd->o_osd)
1093 n = n->rb_left;
1094 else if (o > osd->o_osd)
1095 n = n->rb_right;
1096 else
1097 return osd;
1098 }
1099 return NULL;
1100 }
1101
1102 static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1103 {
1104 schedule_delayed_work(&osdc->timeout_work,
1105 osdc->client->options->osd_keepalive_timeout * HZ);
1106 }
1107
1108 static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1109 {
1110 cancel_delayed_work(&osdc->timeout_work);
1111 }
1112
1113 /*
1114 * Register request, assign tid. If this is the first request, set up
1115 * the timeout event.
1116 */
1117 static void __register_request(struct ceph_osd_client *osdc,
1118 struct ceph_osd_request *req)
1119 {
1120 req->r_tid = ++osdc->last_tid;
1121 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1122 dout("__register_request %p tid %lld\n", req, req->r_tid);
1123 __insert_request(osdc, req);
1124 ceph_osdc_get_request(req);
1125 osdc->num_requests++;
1126 if (osdc->num_requests == 1) {
1127 dout(" first request, scheduling timeout\n");
1128 __schedule_osd_timeout(osdc);
1129 }
1130 }
1131
1132 /*
1133 * called under osdc->request_mutex
1134 */
1135 static void __unregister_request(struct ceph_osd_client *osdc,
1136 struct ceph_osd_request *req)
1137 {
1138 if (RB_EMPTY_NODE(&req->r_node)) {
1139 dout("__unregister_request %p tid %lld not registered\n",
1140 req, req->r_tid);
1141 return;
1142 }
1143
1144 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1145 rb_erase(&req->r_node, &osdc->requests);
1146 osdc->num_requests--;
1147
1148 if (req->r_osd) {
1149 /* make sure the original request isn't in flight. */
1150 ceph_msg_revoke(req->r_request);
1151
1152 list_del_init(&req->r_osd_item);
1153 if (list_empty(&req->r_osd->o_requests) &&
1154 list_empty(&req->r_osd->o_linger_requests)) {
1155 dout("moving osd to %p lru\n", req->r_osd);
1156 __move_osd_to_lru(osdc, req->r_osd);
1157 }
1158 if (list_empty(&req->r_linger_item))
1159 req->r_osd = NULL;
1160 }
1161
1162 list_del_init(&req->r_req_lru_item);
1163 ceph_osdc_put_request(req);
1164
1165 if (osdc->num_requests == 0) {
1166 dout(" no requests, canceling timeout\n");
1167 __cancel_osd_timeout(osdc);
1168 }
1169 }
1170
1171 /*
1172 * Cancel a previously queued request message
1173 */
1174 static void __cancel_request(struct ceph_osd_request *req)
1175 {
1176 if (req->r_sent && req->r_osd) {
1177 ceph_msg_revoke(req->r_request);
1178 req->r_sent = 0;
1179 }
1180 }
1181
1182 static void __register_linger_request(struct ceph_osd_client *osdc,
1183 struct ceph_osd_request *req)
1184 {
1185 dout("__register_linger_request %p\n", req);
1186 ceph_osdc_get_request(req);
1187 list_add_tail(&req->r_linger_item, &osdc->req_linger);
1188 if (req->r_osd)
1189 list_add_tail(&req->r_linger_osd,
1190 &req->r_osd->o_linger_requests);
1191 }
1192
1193 static void __unregister_linger_request(struct ceph_osd_client *osdc,
1194 struct ceph_osd_request *req)
1195 {
1196 dout("__unregister_linger_request %p\n", req);
1197 list_del_init(&req->r_linger_item);
1198 if (req->r_osd) {
1199 list_del_init(&req->r_linger_osd);
1200
1201 if (list_empty(&req->r_osd->o_requests) &&
1202 list_empty(&req->r_osd->o_linger_requests)) {
1203 dout("moving osd to %p lru\n", req->r_osd);
1204 __move_osd_to_lru(osdc, req->r_osd);
1205 }
1206 if (list_empty(&req->r_osd_item))
1207 req->r_osd = NULL;
1208 }
1209 ceph_osdc_put_request(req);
1210 }
1211
1212 void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1213 struct ceph_osd_request *req)
1214 {
1215 mutex_lock(&osdc->request_mutex);
1216 if (req->r_linger) {
1217 req->r_linger = 0;
1218 __unregister_linger_request(osdc, req);
1219 }
1220 mutex_unlock(&osdc->request_mutex);
1221 }
1222 EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1223
1224 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1225 struct ceph_osd_request *req)
1226 {
1227 if (!req->r_linger) {
1228 dout("set_request_linger %p\n", req);
1229 req->r_linger = 1;
1230 }
1231 }
1232 EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1233
1234 /*
1235 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1236 * (as needed), and set the request r_osd appropriately. If there is
1237 * no up osd, set r_osd to NULL. Move the request to the appropriate list
1238 * (unsent, homeless) or leave on in-flight lru.
1239 *
1240 * Return 0 if unchanged, 1 if changed, or negative on error.
1241 *
1242 * Caller should hold map_sem for read and request_mutex.
1243 */
1244 static int __map_request(struct ceph_osd_client *osdc,
1245 struct ceph_osd_request *req, int force_resend)
1246 {
1247 struct ceph_pg pgid;
1248 int acting[CEPH_PG_MAX_SIZE];
1249 int o = -1, num = 0;
1250 int err;
1251
1252 dout("map_request %p tid %lld\n", req, req->r_tid);
1253 err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
1254 ceph_file_layout_pg_pool(req->r_file_layout));
1255 if (err) {
1256 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1257 return err;
1258 }
1259 req->r_pgid = pgid;
1260
1261 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1262 if (err > 0) {
1263 o = acting[0];
1264 num = err;
1265 }
1266
1267 if ((!force_resend &&
1268 req->r_osd && req->r_osd->o_osd == o &&
1269 req->r_sent >= req->r_osd->o_incarnation &&
1270 req->r_num_pg_osds == num &&
1271 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
1272 (req->r_osd == NULL && o == -1))
1273 return 0; /* no change */
1274
1275 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1276 req->r_tid, pgid.pool, pgid.seed, o,
1277 req->r_osd ? req->r_osd->o_osd : -1);
1278
1279 /* record full pg acting set */
1280 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1281 req->r_num_pg_osds = num;
1282
1283 if (req->r_osd) {
1284 __cancel_request(req);
1285 list_del_init(&req->r_osd_item);
1286 req->r_osd = NULL;
1287 }
1288
1289 req->r_osd = __lookup_osd(osdc, o);
1290 if (!req->r_osd && o >= 0) {
1291 err = -ENOMEM;
1292 req->r_osd = create_osd(osdc, o);
1293 if (!req->r_osd) {
1294 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1295 goto out;
1296 }
1297
1298 dout("map_request osd %p is osd%d\n", req->r_osd, o);
1299 __insert_osd(osdc, req->r_osd);
1300
1301 ceph_con_open(&req->r_osd->o_con,
1302 CEPH_ENTITY_TYPE_OSD, o,
1303 &osdc->osdmap->osd_addr[o]);
1304 }
1305
1306 if (req->r_osd) {
1307 __remove_osd_from_lru(req->r_osd);
1308 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1309 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1310 } else {
1311 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1312 }
1313 err = 1; /* osd or pg changed */
1314
1315 out:
1316 return err;
1317 }
1318
1319 /*
1320 * caller should hold map_sem (for read) and request_mutex
1321 */
1322 static void __send_request(struct ceph_osd_client *osdc,
1323 struct ceph_osd_request *req)
1324 {
1325 void *p;
1326
1327 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1328 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1329 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1330
1331 /* fill in message content that changes each time we send it */
1332 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1333 put_unaligned_le32(req->r_flags, req->r_request_flags);
1334 put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
1335 p = req->r_request_pgid;
1336 ceph_encode_64(&p, req->r_pgid.pool);
1337 ceph_encode_32(&p, req->r_pgid.seed);
1338 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1339 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1340 sizeof(req->r_reassert_version));
1341
1342 req->r_stamp = jiffies;
1343 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1344
1345 ceph_msg_get(req->r_request); /* send consumes a ref */
1346
1347 req->r_sent = req->r_osd->o_incarnation;
1348
1349 ceph_con_send(&req->r_osd->o_con, req->r_request);
1350 }
1351
1352 /*
1353 * Send any requests in the queue (req_unsent).
1354 */
1355 static void __send_queued(struct ceph_osd_client *osdc)
1356 {
1357 struct ceph_osd_request *req, *tmp;
1358
1359 dout("__send_queued\n");
1360 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1361 __send_request(osdc, req);
1362 }
1363
1364 /*
1365 * Timeout callback, called every N seconds when 1 or more osd
1366 * requests has been active for more than N seconds. When this
1367 * happens, we ping all OSDs with requests who have timed out to
1368 * ensure any communications channel reset is detected. Reset the
1369 * request timeouts another N seconds in the future as we go.
1370 * Reschedule the timeout event another N seconds in future (unless
1371 * there are no open requests).
1372 */
1373 static void handle_timeout(struct work_struct *work)
1374 {
1375 struct ceph_osd_client *osdc =
1376 container_of(work, struct ceph_osd_client, timeout_work.work);
1377 struct ceph_osd_request *req;
1378 struct ceph_osd *osd;
1379 unsigned long keepalive =
1380 osdc->client->options->osd_keepalive_timeout * HZ;
1381 struct list_head slow_osds;
1382 dout("timeout\n");
1383 down_read(&osdc->map_sem);
1384
1385 ceph_monc_request_next_osdmap(&osdc->client->monc);
1386
1387 mutex_lock(&osdc->request_mutex);
1388
1389 /*
1390 * ping osds that are a bit slow. this ensures that if there
1391 * is a break in the TCP connection we will notice, and reopen
1392 * a connection with that osd (from the fault callback).
1393 */
1394 INIT_LIST_HEAD(&slow_osds);
1395 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
1396 if (time_before(jiffies, req->r_stamp + keepalive))
1397 break;
1398
1399 osd = req->r_osd;
1400 BUG_ON(!osd);
1401 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1402 req->r_tid, osd->o_osd);
1403 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1404 }
1405 while (!list_empty(&slow_osds)) {
1406 osd = list_entry(slow_osds.next, struct ceph_osd,
1407 o_keepalive_item);
1408 list_del_init(&osd->o_keepalive_item);
1409 ceph_con_keepalive(&osd->o_con);
1410 }
1411
1412 __schedule_osd_timeout(osdc);
1413 __send_queued(osdc);
1414 mutex_unlock(&osdc->request_mutex);
1415 up_read(&osdc->map_sem);
1416 }
1417
1418 static void handle_osds_timeout(struct work_struct *work)
1419 {
1420 struct ceph_osd_client *osdc =
1421 container_of(work, struct ceph_osd_client,
1422 osds_timeout_work.work);
1423 unsigned long delay =
1424 osdc->client->options->osd_idle_ttl * HZ >> 2;
1425
1426 dout("osds timeout\n");
1427 down_read(&osdc->map_sem);
1428 remove_old_osds(osdc);
1429 up_read(&osdc->map_sem);
1430
1431 schedule_delayed_work(&osdc->osds_timeout_work,
1432 round_jiffies_relative(delay));
1433 }
1434
1435 static void complete_request(struct ceph_osd_request *req)
1436 {
1437 complete_all(&req->r_safe_completion); /* fsync waiter */
1438 }
1439
1440 /*
1441 * handle osd op reply. either call the callback if it is specified,
1442 * or do the completion to wake up the waiting thread.
1443 */
1444 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1445 struct ceph_connection *con)
1446 {
1447 void *p, *end;
1448 struct ceph_osd_request *req;
1449 u64 tid;
1450 int object_len;
1451 unsigned int numops;
1452 int payload_len, flags;
1453 s32 result;
1454 s32 retry_attempt;
1455 struct ceph_pg pg;
1456 int err;
1457 u32 reassert_epoch;
1458 u64 reassert_version;
1459 u32 osdmap_epoch;
1460 int already_completed;
1461 u32 bytes;
1462 unsigned int i;
1463
1464 tid = le64_to_cpu(msg->hdr.tid);
1465 dout("handle_reply %p tid %llu\n", msg, tid);
1466
1467 p = msg->front.iov_base;
1468 end = p + msg->front.iov_len;
1469
1470 ceph_decode_need(&p, end, 4, bad);
1471 object_len = ceph_decode_32(&p);
1472 ceph_decode_need(&p, end, object_len, bad);
1473 p += object_len;
1474
1475 err = ceph_decode_pgid(&p, end, &pg);
1476 if (err)
1477 goto bad;
1478
1479 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1480 flags = ceph_decode_64(&p);
1481 result = ceph_decode_32(&p);
1482 reassert_epoch = ceph_decode_32(&p);
1483 reassert_version = ceph_decode_64(&p);
1484 osdmap_epoch = ceph_decode_32(&p);
1485
1486 /* lookup */
1487 mutex_lock(&osdc->request_mutex);
1488 req = __lookup_request(osdc, tid);
1489 if (req == NULL) {
1490 dout("handle_reply tid %llu dne\n", tid);
1491 goto bad_mutex;
1492 }
1493 ceph_osdc_get_request(req);
1494
1495 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1496 req, result);
1497
1498 ceph_decode_need(&p, end, 4, bad);
1499 numops = ceph_decode_32(&p);
1500 if (numops > CEPH_OSD_MAX_OP)
1501 goto bad_put;
1502 if (numops != req->r_num_ops)
1503 goto bad_put;
1504 payload_len = 0;
1505 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad);
1506 for (i = 0; i < numops; i++) {
1507 struct ceph_osd_op *op = p;
1508 int len;
1509
1510 len = le32_to_cpu(op->payload_len);
1511 req->r_reply_op_len[i] = len;
1512 dout(" op %d has %d bytes\n", i, len);
1513 payload_len += len;
1514 p += sizeof(*op);
1515 }
1516 bytes = le32_to_cpu(msg->hdr.data_len);
1517 if (payload_len != bytes) {
1518 pr_warning("sum of op payload lens %d != data_len %d",
1519 payload_len, bytes);
1520 goto bad_put;
1521 }
1522
1523 ceph_decode_need(&p, end, 4 + numops * 4, bad);
1524 retry_attempt = ceph_decode_32(&p);
1525 for (i = 0; i < numops; i++)
1526 req->r_reply_op_result[i] = ceph_decode_32(&p);
1527
1528 already_completed = req->r_got_reply;
1529
1530 if (!req->r_got_reply) {
1531
1532 req->r_result = result;
1533 dout("handle_reply result %d bytes %d\n", req->r_result,
1534 bytes);
1535 if (req->r_result == 0)
1536 req->r_result = bytes;
1537
1538 /* in case this is a write and we need to replay, */
1539 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1540 req->r_reassert_version.version = cpu_to_le64(reassert_version);
1541
1542 req->r_got_reply = 1;
1543 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1544 dout("handle_reply tid %llu dup ack\n", tid);
1545 mutex_unlock(&osdc->request_mutex);
1546 goto done;
1547 }
1548
1549 dout("handle_reply tid %llu flags %d\n", tid, flags);
1550
1551 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1552 __register_linger_request(osdc, req);
1553
1554 /* either this is a read, or we got the safe response */
1555 if (result < 0 ||
1556 (flags & CEPH_OSD_FLAG_ONDISK) ||
1557 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1558 __unregister_request(osdc, req);
1559
1560 mutex_unlock(&osdc->request_mutex);
1561
1562 if (!already_completed) {
1563 if (req->r_unsafe_callback &&
1564 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1565 req->r_unsafe_callback(req, true);
1566 if (req->r_callback)
1567 req->r_callback(req, msg);
1568 else
1569 complete_all(&req->r_completion);
1570 }
1571
1572 if (flags & CEPH_OSD_FLAG_ONDISK) {
1573 if (req->r_unsafe_callback && already_completed)
1574 req->r_unsafe_callback(req, false);
1575 complete_request(req);
1576 }
1577
1578 done:
1579 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
1580 ceph_osdc_put_request(req);
1581 return;
1582
1583 bad_put:
1584 ceph_osdc_put_request(req);
1585 bad_mutex:
1586 mutex_unlock(&osdc->request_mutex);
1587 bad:
1588 pr_err("corrupt osd_op_reply got %d %d\n",
1589 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1590 ceph_msg_dump(msg);
1591 }
1592
1593 static void reset_changed_osds(struct ceph_osd_client *osdc)
1594 {
1595 struct rb_node *p, *n;
1596
1597 for (p = rb_first(&osdc->osds); p; p = n) {
1598 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
1599
1600 n = rb_next(p);
1601 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1602 memcmp(&osd->o_con.peer_addr,
1603 ceph_osd_addr(osdc->osdmap,
1604 osd->o_osd),
1605 sizeof(struct ceph_entity_addr)) != 0)
1606 __reset_osd(osdc, osd);
1607 }
1608 }
1609
1610 /*
1611 * Requeue requests whose mapping to an OSD has changed. If requests map to
1612 * no osd, request a new map.
1613 *
1614 * Caller should hold map_sem for read.
1615 */
1616 static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
1617 {
1618 struct ceph_osd_request *req, *nreq;
1619 struct rb_node *p;
1620 int needmap = 0;
1621 int err;
1622
1623 dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
1624 mutex_lock(&osdc->request_mutex);
1625 for (p = rb_first(&osdc->requests); p; ) {
1626 req = rb_entry(p, struct ceph_osd_request, r_node);
1627 p = rb_next(p);
1628
1629 /*
1630 * For linger requests that have not yet been
1631 * registered, move them to the linger list; they'll
1632 * be sent to the osd in the loop below. Unregister
1633 * the request before re-registering it as a linger
1634 * request to ensure the __map_request() below
1635 * will decide it needs to be sent.
1636 */
1637 if (req->r_linger && list_empty(&req->r_linger_item)) {
1638 dout("%p tid %llu restart on osd%d\n",
1639 req, req->r_tid,
1640 req->r_osd ? req->r_osd->o_osd : -1);
1641 ceph_osdc_get_request(req);
1642 __unregister_request(osdc, req);
1643 __register_linger_request(osdc, req);
1644 ceph_osdc_put_request(req);
1645 continue;
1646 }
1647
1648 err = __map_request(osdc, req, force_resend);
1649 if (err < 0)
1650 continue; /* error */
1651 if (req->r_osd == NULL) {
1652 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1653 needmap++; /* request a newer map */
1654 } else if (err > 0) {
1655 if (!req->r_linger) {
1656 dout("%p tid %llu requeued on osd%d\n", req,
1657 req->r_tid,
1658 req->r_osd ? req->r_osd->o_osd : -1);
1659 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1660 }
1661 }
1662 }
1663
1664 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1665 r_linger_item) {
1666 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1667
1668 err = __map_request(osdc, req, force_resend);
1669 dout("__map_request returned %d\n", err);
1670 if (err == 0)
1671 continue; /* no change and no osd was specified */
1672 if (err < 0)
1673 continue; /* hrm! */
1674 if (req->r_osd == NULL) {
1675 dout("tid %llu maps to no valid osd\n", req->r_tid);
1676 needmap++; /* request a newer map */
1677 continue;
1678 }
1679
1680 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1681 req->r_osd ? req->r_osd->o_osd : -1);
1682 __register_request(osdc, req);
1683 __unregister_linger_request(osdc, req);
1684 }
1685 reset_changed_osds(osdc);
1686 mutex_unlock(&osdc->request_mutex);
1687
1688 if (needmap) {
1689 dout("%d requests for down osds, need new map\n", needmap);
1690 ceph_monc_request_next_osdmap(&osdc->client->monc);
1691 }
1692 }
1693
1694
1695 /*
1696 * Process updated osd map.
1697 *
1698 * The message contains any number of incremental and full maps, normally
1699 * indicating some sort of topology change in the cluster. Kick requests
1700 * off to different OSDs as needed.
1701 */
1702 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1703 {
1704 void *p, *end, *next;
1705 u32 nr_maps, maplen;
1706 u32 epoch;
1707 struct ceph_osdmap *newmap = NULL, *oldmap;
1708 int err;
1709 struct ceph_fsid fsid;
1710
1711 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1712 p = msg->front.iov_base;
1713 end = p + msg->front.iov_len;
1714
1715 /* verify fsid */
1716 ceph_decode_need(&p, end, sizeof(fsid), bad);
1717 ceph_decode_copy(&p, &fsid, sizeof(fsid));
1718 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1719 return;
1720
1721 down_write(&osdc->map_sem);
1722
1723 /* incremental maps */
1724 ceph_decode_32_safe(&p, end, nr_maps, bad);
1725 dout(" %d inc maps\n", nr_maps);
1726 while (nr_maps > 0) {
1727 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1728 epoch = ceph_decode_32(&p);
1729 maplen = ceph_decode_32(&p);
1730 ceph_decode_need(&p, end, maplen, bad);
1731 next = p + maplen;
1732 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1733 dout("applying incremental map %u len %d\n",
1734 epoch, maplen);
1735 newmap = osdmap_apply_incremental(&p, next,
1736 osdc->osdmap,
1737 &osdc->client->msgr);
1738 if (IS_ERR(newmap)) {
1739 err = PTR_ERR(newmap);
1740 goto bad;
1741 }
1742 BUG_ON(!newmap);
1743 if (newmap != osdc->osdmap) {
1744 ceph_osdmap_destroy(osdc->osdmap);
1745 osdc->osdmap = newmap;
1746 }
1747 kick_requests(osdc, 0);
1748 } else {
1749 dout("ignoring incremental map %u len %d\n",
1750 epoch, maplen);
1751 }
1752 p = next;
1753 nr_maps--;
1754 }
1755 if (newmap)
1756 goto done;
1757
1758 /* full maps */
1759 ceph_decode_32_safe(&p, end, nr_maps, bad);
1760 dout(" %d full maps\n", nr_maps);
1761 while (nr_maps) {
1762 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1763 epoch = ceph_decode_32(&p);
1764 maplen = ceph_decode_32(&p);
1765 ceph_decode_need(&p, end, maplen, bad);
1766 if (nr_maps > 1) {
1767 dout("skipping non-latest full map %u len %d\n",
1768 epoch, maplen);
1769 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1770 dout("skipping full map %u len %d, "
1771 "older than our %u\n", epoch, maplen,
1772 osdc->osdmap->epoch);
1773 } else {
1774 int skipped_map = 0;
1775
1776 dout("taking full map %u len %d\n", epoch, maplen);
1777 newmap = osdmap_decode(&p, p+maplen);
1778 if (IS_ERR(newmap)) {
1779 err = PTR_ERR(newmap);
1780 goto bad;
1781 }
1782 BUG_ON(!newmap);
1783 oldmap = osdc->osdmap;
1784 osdc->osdmap = newmap;
1785 if (oldmap) {
1786 if (oldmap->epoch + 1 < newmap->epoch)
1787 skipped_map = 1;
1788 ceph_osdmap_destroy(oldmap);
1789 }
1790 kick_requests(osdc, skipped_map);
1791 }
1792 p += maplen;
1793 nr_maps--;
1794 }
1795
1796 done:
1797 downgrade_write(&osdc->map_sem);
1798 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1799
1800 /*
1801 * subscribe to subsequent osdmap updates if full to ensure
1802 * we find out when we are no longer full and stop returning
1803 * ENOSPC.
1804 */
1805 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
1806 ceph_monc_request_next_osdmap(&osdc->client->monc);
1807
1808 mutex_lock(&osdc->request_mutex);
1809 __send_queued(osdc);
1810 mutex_unlock(&osdc->request_mutex);
1811 up_read(&osdc->map_sem);
1812 wake_up_all(&osdc->client->auth_wq);
1813 return;
1814
1815 bad:
1816 pr_err("osdc handle_map corrupt msg\n");
1817 ceph_msg_dump(msg);
1818 up_write(&osdc->map_sem);
1819 return;
1820 }
1821
1822 /*
1823 * watch/notify callback event infrastructure
1824 *
1825 * These callbacks are used both for watch and notify operations.
1826 */
1827 static void __release_event(struct kref *kref)
1828 {
1829 struct ceph_osd_event *event =
1830 container_of(kref, struct ceph_osd_event, kref);
1831
1832 dout("__release_event %p\n", event);
1833 kfree(event);
1834 }
1835
1836 static void get_event(struct ceph_osd_event *event)
1837 {
1838 kref_get(&event->kref);
1839 }
1840
1841 void ceph_osdc_put_event(struct ceph_osd_event *event)
1842 {
1843 kref_put(&event->kref, __release_event);
1844 }
1845 EXPORT_SYMBOL(ceph_osdc_put_event);
1846
1847 static void __insert_event(struct ceph_osd_client *osdc,
1848 struct ceph_osd_event *new)
1849 {
1850 struct rb_node **p = &osdc->event_tree.rb_node;
1851 struct rb_node *parent = NULL;
1852 struct ceph_osd_event *event = NULL;
1853
1854 while (*p) {
1855 parent = *p;
1856 event = rb_entry(parent, struct ceph_osd_event, node);
1857 if (new->cookie < event->cookie)
1858 p = &(*p)->rb_left;
1859 else if (new->cookie > event->cookie)
1860 p = &(*p)->rb_right;
1861 else
1862 BUG();
1863 }
1864
1865 rb_link_node(&new->node, parent, p);
1866 rb_insert_color(&new->node, &osdc->event_tree);
1867 }
1868
1869 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
1870 u64 cookie)
1871 {
1872 struct rb_node **p = &osdc->event_tree.rb_node;
1873 struct rb_node *parent = NULL;
1874 struct ceph_osd_event *event = NULL;
1875
1876 while (*p) {
1877 parent = *p;
1878 event = rb_entry(parent, struct ceph_osd_event, node);
1879 if (cookie < event->cookie)
1880 p = &(*p)->rb_left;
1881 else if (cookie > event->cookie)
1882 p = &(*p)->rb_right;
1883 else
1884 return event;
1885 }
1886 return NULL;
1887 }
1888
1889 static void __remove_event(struct ceph_osd_event *event)
1890 {
1891 struct ceph_osd_client *osdc = event->osdc;
1892
1893 if (!RB_EMPTY_NODE(&event->node)) {
1894 dout("__remove_event removed %p\n", event);
1895 rb_erase(&event->node, &osdc->event_tree);
1896 ceph_osdc_put_event(event);
1897 } else {
1898 dout("__remove_event didn't remove %p\n", event);
1899 }
1900 }
1901
1902 int ceph_osdc_create_event(struct ceph_osd_client *osdc,
1903 void (*event_cb)(u64, u64, u8, void *),
1904 void *data, struct ceph_osd_event **pevent)
1905 {
1906 struct ceph_osd_event *event;
1907
1908 event = kmalloc(sizeof(*event), GFP_NOIO);
1909 if (!event)
1910 return -ENOMEM;
1911
1912 dout("create_event %p\n", event);
1913 event->cb = event_cb;
1914 event->one_shot = 0;
1915 event->data = data;
1916 event->osdc = osdc;
1917 INIT_LIST_HEAD(&event->osd_node);
1918 RB_CLEAR_NODE(&event->node);
1919 kref_init(&event->kref); /* one ref for us */
1920 kref_get(&event->kref); /* one ref for the caller */
1921
1922 spin_lock(&osdc->event_lock);
1923 event->cookie = ++osdc->event_count;
1924 __insert_event(osdc, event);
1925 spin_unlock(&osdc->event_lock);
1926
1927 *pevent = event;
1928 return 0;
1929 }
1930 EXPORT_SYMBOL(ceph_osdc_create_event);
1931
1932 void ceph_osdc_cancel_event(struct ceph_osd_event *event)
1933 {
1934 struct ceph_osd_client *osdc = event->osdc;
1935
1936 dout("cancel_event %p\n", event);
1937 spin_lock(&osdc->event_lock);
1938 __remove_event(event);
1939 spin_unlock(&osdc->event_lock);
1940 ceph_osdc_put_event(event); /* caller's */
1941 }
1942 EXPORT_SYMBOL(ceph_osdc_cancel_event);
1943
1944
1945 static void do_event_work(struct work_struct *work)
1946 {
1947 struct ceph_osd_event_work *event_work =
1948 container_of(work, struct ceph_osd_event_work, work);
1949 struct ceph_osd_event *event = event_work->event;
1950 u64 ver = event_work->ver;
1951 u64 notify_id = event_work->notify_id;
1952 u8 opcode = event_work->opcode;
1953
1954 dout("do_event_work completing %p\n", event);
1955 event->cb(ver, notify_id, opcode, event->data);
1956 dout("do_event_work completed %p\n", event);
1957 ceph_osdc_put_event(event);
1958 kfree(event_work);
1959 }
1960
1961
1962 /*
1963 * Process osd watch notifications
1964 */
1965 static void handle_watch_notify(struct ceph_osd_client *osdc,
1966 struct ceph_msg *msg)
1967 {
1968 void *p, *end;
1969 u8 proto_ver;
1970 u64 cookie, ver, notify_id;
1971 u8 opcode;
1972 struct ceph_osd_event *event;
1973 struct ceph_osd_event_work *event_work;
1974
1975 p = msg->front.iov_base;
1976 end = p + msg->front.iov_len;
1977
1978 ceph_decode_8_safe(&p, end, proto_ver, bad);
1979 ceph_decode_8_safe(&p, end, opcode, bad);
1980 ceph_decode_64_safe(&p, end, cookie, bad);
1981 ceph_decode_64_safe(&p, end, ver, bad);
1982 ceph_decode_64_safe(&p, end, notify_id, bad);
1983
1984 spin_lock(&osdc->event_lock);
1985 event = __find_event(osdc, cookie);
1986 if (event) {
1987 BUG_ON(event->one_shot);
1988 get_event(event);
1989 }
1990 spin_unlock(&osdc->event_lock);
1991 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
1992 cookie, ver, event);
1993 if (event) {
1994 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
1995 if (!event_work) {
1996 dout("ERROR: could not allocate event_work\n");
1997 goto done_err;
1998 }
1999 INIT_WORK(&event_work->work, do_event_work);
2000 event_work->event = event;
2001 event_work->ver = ver;
2002 event_work->notify_id = notify_id;
2003 event_work->opcode = opcode;
2004 if (!queue_work(osdc->notify_wq, &event_work->work)) {
2005 dout("WARNING: failed to queue notify event work\n");
2006 goto done_err;
2007 }
2008 }
2009
2010 return;
2011
2012 done_err:
2013 ceph_osdc_put_event(event);
2014 return;
2015
2016 bad:
2017 pr_err("osdc handle_watch_notify corrupt msg\n");
2018 return;
2019 }
2020
2021 /*
2022 * build new request AND message
2023 *
2024 */
2025 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2026 struct ceph_snap_context *snapc, u64 snap_id,
2027 struct timespec *mtime)
2028 {
2029 struct ceph_msg *msg = req->r_request;
2030 void *p;
2031 size_t msg_size;
2032 int flags = req->r_flags;
2033 u64 data_len;
2034 unsigned int i;
2035
2036 req->r_snapid = snap_id;
2037 req->r_snapc = ceph_get_snap_context(snapc);
2038
2039 /* encode request */
2040 msg->hdr.version = cpu_to_le16(4);
2041
2042 p = msg->front.iov_base;
2043 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2044 req->r_request_osdmap_epoch = p;
2045 p += 4;
2046 req->r_request_flags = p;
2047 p += 4;
2048 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2049 ceph_encode_timespec(p, mtime);
2050 p += sizeof(struct ceph_timespec);
2051 req->r_request_reassert_version = p;
2052 p += sizeof(struct ceph_eversion); /* will get filled in */
2053
2054 /* oloc */
2055 ceph_encode_8(&p, 4);
2056 ceph_encode_8(&p, 4);
2057 ceph_encode_32(&p, 8 + 4 + 4);
2058 req->r_request_pool = p;
2059 p += 8;
2060 ceph_encode_32(&p, -1); /* preferred */
2061 ceph_encode_32(&p, 0); /* key len */
2062
2063 ceph_encode_8(&p, 1);
2064 req->r_request_pgid = p;
2065 p += 8 + 4;
2066 ceph_encode_32(&p, -1); /* preferred */
2067
2068 /* oid */
2069 ceph_encode_32(&p, req->r_oid_len);
2070 memcpy(p, req->r_oid, req->r_oid_len);
2071 dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
2072 p += req->r_oid_len;
2073
2074 /* ops--can imply data */
2075 ceph_encode_16(&p, (u16)req->r_num_ops);
2076 data_len = 0;
2077 for (i = 0; i < req->r_num_ops; i++) {
2078 data_len += osd_req_encode_op(req, p, i);
2079 p += sizeof(struct ceph_osd_op);
2080 }
2081
2082 /* snaps */
2083 ceph_encode_64(&p, req->r_snapid);
2084 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2085 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2086 if (req->r_snapc) {
2087 for (i = 0; i < snapc->num_snaps; i++) {
2088 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2089 }
2090 }
2091
2092 req->r_request_attempts = p;
2093 p += 4;
2094
2095 /* data */
2096 if (flags & CEPH_OSD_FLAG_WRITE) {
2097 u16 data_off;
2098
2099 /*
2100 * The header "data_off" is a hint to the receiver
2101 * allowing it to align received data into its
2102 * buffers such that there's no need to re-copy
2103 * it before writing it to disk (direct I/O).
2104 */
2105 data_off = (u16) (off & 0xffff);
2106 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2107 }
2108 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2109
2110 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2111 msg_size = p - msg->front.iov_base;
2112 msg->front.iov_len = msg_size;
2113 msg->hdr.front_len = cpu_to_le32(msg_size);
2114
2115 dout("build_request msg_size was %d\n", (int)msg_size);
2116 }
2117 EXPORT_SYMBOL(ceph_osdc_build_request);
2118
2119 /*
2120 * Register request, send initial attempt.
2121 */
2122 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2123 struct ceph_osd_request *req,
2124 bool nofail)
2125 {
2126 int rc = 0;
2127
2128 down_read(&osdc->map_sem);
2129 mutex_lock(&osdc->request_mutex);
2130 __register_request(osdc, req);
2131 req->r_sent = 0;
2132 req->r_got_reply = 0;
2133 rc = __map_request(osdc, req, 0);
2134 if (rc < 0) {
2135 if (nofail) {
2136 dout("osdc_start_request failed map, "
2137 " will retry %lld\n", req->r_tid);
2138 rc = 0;
2139 } else {
2140 __unregister_request(osdc, req);
2141 }
2142 goto out_unlock;
2143 }
2144 if (req->r_osd == NULL) {
2145 dout("send_request %p no up osds in pg\n", req);
2146 ceph_monc_request_next_osdmap(&osdc->client->monc);
2147 } else {
2148 __send_queued(osdc);
2149 }
2150 rc = 0;
2151 out_unlock:
2152 mutex_unlock(&osdc->request_mutex);
2153 up_read(&osdc->map_sem);
2154 return rc;
2155 }
2156 EXPORT_SYMBOL(ceph_osdc_start_request);
2157
2158 /*
2159 * wait for a request to complete
2160 */
2161 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2162 struct ceph_osd_request *req)
2163 {
2164 int rc;
2165
2166 rc = wait_for_completion_interruptible(&req->r_completion);
2167 if (rc < 0) {
2168 mutex_lock(&osdc->request_mutex);
2169 __cancel_request(req);
2170 __unregister_request(osdc, req);
2171 mutex_unlock(&osdc->request_mutex);
2172 complete_request(req);
2173 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
2174 return rc;
2175 }
2176
2177 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2178 return req->r_result;
2179 }
2180 EXPORT_SYMBOL(ceph_osdc_wait_request);
2181
2182 /*
2183 * sync - wait for all in-flight requests to flush. avoid starvation.
2184 */
2185 void ceph_osdc_sync(struct ceph_osd_client *osdc)
2186 {
2187 struct ceph_osd_request *req;
2188 u64 last_tid, next_tid = 0;
2189
2190 mutex_lock(&osdc->request_mutex);
2191 last_tid = osdc->last_tid;
2192 while (1) {
2193 req = __lookup_request_ge(osdc, next_tid);
2194 if (!req)
2195 break;
2196 if (req->r_tid > last_tid)
2197 break;
2198
2199 next_tid = req->r_tid + 1;
2200 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2201 continue;
2202
2203 ceph_osdc_get_request(req);
2204 mutex_unlock(&osdc->request_mutex);
2205 dout("sync waiting on tid %llu (last is %llu)\n",
2206 req->r_tid, last_tid);
2207 wait_for_completion(&req->r_safe_completion);
2208 mutex_lock(&osdc->request_mutex);
2209 ceph_osdc_put_request(req);
2210 }
2211 mutex_unlock(&osdc->request_mutex);
2212 dout("sync done (thru tid %llu)\n", last_tid);
2213 }
2214 EXPORT_SYMBOL(ceph_osdc_sync);
2215
2216 /*
2217 * init, shutdown
2218 */
2219 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2220 {
2221 int err;
2222
2223 dout("init\n");
2224 osdc->client = client;
2225 osdc->osdmap = NULL;
2226 init_rwsem(&osdc->map_sem);
2227 init_completion(&osdc->map_waiters);
2228 osdc->last_requested_map = 0;
2229 mutex_init(&osdc->request_mutex);
2230 osdc->last_tid = 0;
2231 osdc->osds = RB_ROOT;
2232 INIT_LIST_HEAD(&osdc->osd_lru);
2233 osdc->requests = RB_ROOT;
2234 INIT_LIST_HEAD(&osdc->req_lru);
2235 INIT_LIST_HEAD(&osdc->req_unsent);
2236 INIT_LIST_HEAD(&osdc->req_notarget);
2237 INIT_LIST_HEAD(&osdc->req_linger);
2238 osdc->num_requests = 0;
2239 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2240 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2241 spin_lock_init(&osdc->event_lock);
2242 osdc->event_tree = RB_ROOT;
2243 osdc->event_count = 0;
2244
2245 schedule_delayed_work(&osdc->osds_timeout_work,
2246 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
2247
2248 err = -ENOMEM;
2249 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2250 sizeof(struct ceph_osd_request));
2251 if (!osdc->req_mempool)
2252 goto out;
2253
2254 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2255 OSD_OP_FRONT_LEN, 10, true,
2256 "osd_op");
2257 if (err < 0)
2258 goto out_mempool;
2259 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2260 OSD_OPREPLY_FRONT_LEN, 10, true,
2261 "osd_op_reply");
2262 if (err < 0)
2263 goto out_msgpool;
2264
2265 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2266 if (IS_ERR(osdc->notify_wq)) {
2267 err = PTR_ERR(osdc->notify_wq);
2268 osdc->notify_wq = NULL;
2269 goto out_msgpool;
2270 }
2271 return 0;
2272
2273 out_msgpool:
2274 ceph_msgpool_destroy(&osdc->msgpool_op);
2275 out_mempool:
2276 mempool_destroy(osdc->req_mempool);
2277 out:
2278 return err;
2279 }
2280
2281 void ceph_osdc_stop(struct ceph_osd_client *osdc)
2282 {
2283 flush_workqueue(osdc->notify_wq);
2284 destroy_workqueue(osdc->notify_wq);
2285 cancel_delayed_work_sync(&osdc->timeout_work);
2286 cancel_delayed_work_sync(&osdc->osds_timeout_work);
2287 if (osdc->osdmap) {
2288 ceph_osdmap_destroy(osdc->osdmap);
2289 osdc->osdmap = NULL;
2290 }
2291 remove_all_osds(osdc);
2292 mempool_destroy(osdc->req_mempool);
2293 ceph_msgpool_destroy(&osdc->msgpool_op);
2294 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2295 }
2296
2297 /*
2298 * Read some contiguous pages. If we cross a stripe boundary, shorten
2299 * *plen. Return number of bytes read, or error.
2300 */
2301 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2302 struct ceph_vino vino, struct ceph_file_layout *layout,
2303 u64 off, u64 *plen,
2304 u32 truncate_seq, u64 truncate_size,
2305 struct page **pages, int num_pages, int page_align)
2306 {
2307 struct ceph_osd_request *req;
2308 int rc = 0;
2309
2310 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2311 vino.snap, off, *plen);
2312 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
2313 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2314 NULL, truncate_seq, truncate_size,
2315 false);
2316 if (IS_ERR(req))
2317 return PTR_ERR(req);
2318
2319 /* it may be a short read due to an object boundary */
2320
2321 osd_req_op_extent_osd_data_pages(req, 0,
2322 pages, *plen, page_align, false, false);
2323
2324 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
2325 off, *plen, *plen, page_align);
2326
2327 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2328
2329 rc = ceph_osdc_start_request(osdc, req, false);
2330 if (!rc)
2331 rc = ceph_osdc_wait_request(osdc, req);
2332
2333 ceph_osdc_put_request(req);
2334 dout("readpages result %d\n", rc);
2335 return rc;
2336 }
2337 EXPORT_SYMBOL(ceph_osdc_readpages);
2338
2339 /*
2340 * do a synchronous write on N pages
2341 */
2342 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2343 struct ceph_file_layout *layout,
2344 struct ceph_snap_context *snapc,
2345 u64 off, u64 len,
2346 u32 truncate_seq, u64 truncate_size,
2347 struct timespec *mtime,
2348 struct page **pages, int num_pages)
2349 {
2350 struct ceph_osd_request *req;
2351 int rc = 0;
2352 int page_align = off & ~PAGE_MASK;
2353
2354 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
2355 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
2356 CEPH_OSD_OP_WRITE,
2357 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2358 snapc, truncate_seq, truncate_size,
2359 true);
2360 if (IS_ERR(req))
2361 return PTR_ERR(req);
2362
2363 /* it may be a short write due to an object boundary */
2364 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2365 false, false);
2366 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
2367
2368 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2369
2370 rc = ceph_osdc_start_request(osdc, req, true);
2371 if (!rc)
2372 rc = ceph_osdc_wait_request(osdc, req);
2373
2374 ceph_osdc_put_request(req);
2375 if (rc == 0)
2376 rc = len;
2377 dout("writepages result %d\n", rc);
2378 return rc;
2379 }
2380 EXPORT_SYMBOL(ceph_osdc_writepages);
2381
2382 int ceph_osdc_setup(void)
2383 {
2384 BUG_ON(ceph_osd_request_cache);
2385 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2386 sizeof (struct ceph_osd_request),
2387 __alignof__(struct ceph_osd_request),
2388 0, NULL);
2389
2390 return ceph_osd_request_cache ? 0 : -ENOMEM;
2391 }
2392 EXPORT_SYMBOL(ceph_osdc_setup);
2393
2394 void ceph_osdc_cleanup(void)
2395 {
2396 BUG_ON(!ceph_osd_request_cache);
2397 kmem_cache_destroy(ceph_osd_request_cache);
2398 ceph_osd_request_cache = NULL;
2399 }
2400 EXPORT_SYMBOL(ceph_osdc_cleanup);
2401
2402 /*
2403 * handle incoming message
2404 */
2405 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2406 {
2407 struct ceph_osd *osd = con->private;
2408 struct ceph_osd_client *osdc;
2409 int type = le16_to_cpu(msg->hdr.type);
2410
2411 if (!osd)
2412 goto out;
2413 osdc = osd->o_osdc;
2414
2415 switch (type) {
2416 case CEPH_MSG_OSD_MAP:
2417 ceph_osdc_handle_map(osdc, msg);
2418 break;
2419 case CEPH_MSG_OSD_OPREPLY:
2420 handle_reply(osdc, msg, con);
2421 break;
2422 case CEPH_MSG_WATCH_NOTIFY:
2423 handle_watch_notify(osdc, msg);
2424 break;
2425
2426 default:
2427 pr_err("received unknown message type %d %s\n", type,
2428 ceph_msg_type_name(type));
2429 }
2430 out:
2431 ceph_msg_put(msg);
2432 }
2433
2434 /*
2435 * lookup and return message for incoming reply. set up reply message
2436 * pages.
2437 */
2438 static struct ceph_msg *get_reply(struct ceph_connection *con,
2439 struct ceph_msg_header *hdr,
2440 int *skip)
2441 {
2442 struct ceph_osd *osd = con->private;
2443 struct ceph_osd_client *osdc = osd->o_osdc;
2444 struct ceph_msg *m;
2445 struct ceph_osd_request *req;
2446 int front = le32_to_cpu(hdr->front_len);
2447 int data_len = le32_to_cpu(hdr->data_len);
2448 u64 tid;
2449
2450 tid = le64_to_cpu(hdr->tid);
2451 mutex_lock(&osdc->request_mutex);
2452 req = __lookup_request(osdc, tid);
2453 if (!req) {
2454 *skip = 1;
2455 m = NULL;
2456 dout("get_reply unknown tid %llu from osd%d\n", tid,
2457 osd->o_osd);
2458 goto out;
2459 }
2460
2461 if (req->r_reply->con)
2462 dout("%s revoking msg %p from old con %p\n", __func__,
2463 req->r_reply, req->r_reply->con);
2464 ceph_msg_revoke_incoming(req->r_reply);
2465
2466 if (front > req->r_reply->front.iov_len) {
2467 pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
2468 front, (int)req->r_reply->front.iov_len,
2469 (unsigned int)con->peer_name.type,
2470 le64_to_cpu(con->peer_name.num));
2471 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
2472 if (!m)
2473 goto out;
2474 ceph_msg_put(req->r_reply);
2475 req->r_reply = m;
2476 }
2477 m = ceph_msg_get(req->r_reply);
2478
2479 if (data_len > 0) {
2480 struct ceph_osd_data *osd_data;
2481
2482 /*
2483 * XXX This is assuming there is only one op containing
2484 * XXX page data. Probably OK for reads, but this
2485 * XXX ought to be done more generally.
2486 */
2487 osd_data = osd_req_op_extent_osd_data(req, 0);
2488 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
2489 if (osd_data->pages &&
2490 unlikely(osd_data->length < data_len)) {
2491
2492 pr_warning("tid %lld reply has %d bytes "
2493 "we had only %llu bytes ready\n",
2494 tid, data_len, osd_data->length);
2495 *skip = 1;
2496 ceph_msg_put(m);
2497 m = NULL;
2498 goto out;
2499 }
2500 }
2501 }
2502 *skip = 0;
2503 dout("get_reply tid %lld %p\n", tid, m);
2504
2505 out:
2506 mutex_unlock(&osdc->request_mutex);
2507 return m;
2508
2509 }
2510
2511 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2512 struct ceph_msg_header *hdr,
2513 int *skip)
2514 {
2515 struct ceph_osd *osd = con->private;
2516 int type = le16_to_cpu(hdr->type);
2517 int front = le32_to_cpu(hdr->front_len);
2518
2519 *skip = 0;
2520 switch (type) {
2521 case CEPH_MSG_OSD_MAP:
2522 case CEPH_MSG_WATCH_NOTIFY:
2523 return ceph_msg_new(type, front, GFP_NOFS, false);
2524 case CEPH_MSG_OSD_OPREPLY:
2525 return get_reply(con, hdr, skip);
2526 default:
2527 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2528 osd->o_osd);
2529 *skip = 1;
2530 return NULL;
2531 }
2532 }
2533
2534 /*
2535 * Wrappers to refcount containing ceph_osd struct
2536 */
2537 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2538 {
2539 struct ceph_osd *osd = con->private;
2540 if (get_osd(osd))
2541 return con;
2542 return NULL;
2543 }
2544
2545 static void put_osd_con(struct ceph_connection *con)
2546 {
2547 struct ceph_osd *osd = con->private;
2548 put_osd(osd);
2549 }
2550
2551 /*
2552 * authentication
2553 */
2554 /*
2555 * Note: returned pointer is the address of a structure that's
2556 * managed separately. Caller must *not* attempt to free it.
2557 */
2558 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
2559 int *proto, int force_new)
2560 {
2561 struct ceph_osd *o = con->private;
2562 struct ceph_osd_client *osdc = o->o_osdc;
2563 struct ceph_auth_client *ac = osdc->client->monc.auth;
2564 struct ceph_auth_handshake *auth = &o->o_auth;
2565
2566 if (force_new && auth->authorizer) {
2567 ceph_auth_destroy_authorizer(ac, auth->authorizer);
2568 auth->authorizer = NULL;
2569 }
2570 if (!auth->authorizer) {
2571 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2572 auth);
2573 if (ret)
2574 return ERR_PTR(ret);
2575 } else {
2576 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2577 auth);
2578 if (ret)
2579 return ERR_PTR(ret);
2580 }
2581 *proto = ac->protocol;
2582
2583 return auth;
2584 }
2585
2586
2587 static int verify_authorizer_reply(struct ceph_connection *con, int len)
2588 {
2589 struct ceph_osd *o = con->private;
2590 struct ceph_osd_client *osdc = o->o_osdc;
2591 struct ceph_auth_client *ac = osdc->client->monc.auth;
2592
2593 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2594 }
2595
2596 static int invalidate_authorizer(struct ceph_connection *con)
2597 {
2598 struct ceph_osd *o = con->private;
2599 struct ceph_osd_client *osdc = o->o_osdc;
2600 struct ceph_auth_client *ac = osdc->client->monc.auth;
2601
2602 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2603 return ceph_monc_validate_auth(&osdc->client->monc);
2604 }
2605
2606 static const struct ceph_connection_operations osd_con_ops = {
2607 .get = get_osd_con,
2608 .put = put_osd_con,
2609 .dispatch = dispatch,
2610 .get_authorizer = get_authorizer,
2611 .verify_authorizer_reply = verify_authorizer_reply,
2612 .invalidate_authorizer = invalidate_authorizer,
2613 .alloc_msg = alloc_msg,
2614 .fault = osd_reset,
2615 };
Linux kernel - Deliverables
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