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SUNRPC: Fix oops when trace sunrpc_task events in nfs client
[linux/fpc-iii.git] / net / ceph / osd_client.c
blob0676f2b199d672eaf61157cdf78b75ee74afb434
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 + CEPH_MAX_OID_NAME_LEN; /* oid */
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 req->r_base_oloc.pool = -1;
372 req->r_target_oloc.pool = -1;
373
374 /* create reply message */
375 if (use_mempool)
376 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
377 else
378 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
379 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
380 if (!msg) {
381 ceph_osdc_put_request(req);
382 return NULL;
383 }
384 req->r_reply = msg;
385
386 /* create request message; allow space for oid */
387 if (use_mempool)
388 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
389 else
390 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
391 if (!msg) {
392 ceph_osdc_put_request(req);
393 return NULL;
394 }
395
396 memset(msg->front.iov_base, 0, msg->front.iov_len);
397
398 req->r_request = msg;
399
400 return req;
401 }
402 EXPORT_SYMBOL(ceph_osdc_alloc_request);
403
404 static bool osd_req_opcode_valid(u16 opcode)
405 {
406 switch (opcode) {
407 case CEPH_OSD_OP_READ:
408 case CEPH_OSD_OP_STAT:
409 case CEPH_OSD_OP_MAPEXT:
410 case CEPH_OSD_OP_MASKTRUNC:
411 case CEPH_OSD_OP_SPARSE_READ:
412 case CEPH_OSD_OP_NOTIFY:
413 case CEPH_OSD_OP_NOTIFY_ACK:
414 case CEPH_OSD_OP_ASSERT_VER:
415 case CEPH_OSD_OP_WRITE:
416 case CEPH_OSD_OP_WRITEFULL:
417 case CEPH_OSD_OP_TRUNCATE:
418 case CEPH_OSD_OP_ZERO:
419 case CEPH_OSD_OP_DELETE:
420 case CEPH_OSD_OP_APPEND:
421 case CEPH_OSD_OP_STARTSYNC:
422 case CEPH_OSD_OP_SETTRUNC:
423 case CEPH_OSD_OP_TRIMTRUNC:
424 case CEPH_OSD_OP_TMAPUP:
425 case CEPH_OSD_OP_TMAPPUT:
426 case CEPH_OSD_OP_TMAPGET:
427 case CEPH_OSD_OP_CREATE:
428 case CEPH_OSD_OP_ROLLBACK:
429 case CEPH_OSD_OP_WATCH:
430 case CEPH_OSD_OP_OMAPGETKEYS:
431 case CEPH_OSD_OP_OMAPGETVALS:
432 case CEPH_OSD_OP_OMAPGETHEADER:
433 case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
434 case CEPH_OSD_OP_OMAPSETVALS:
435 case CEPH_OSD_OP_OMAPSETHEADER:
436 case CEPH_OSD_OP_OMAPCLEAR:
437 case CEPH_OSD_OP_OMAPRMKEYS:
438 case CEPH_OSD_OP_OMAP_CMP:
439 case CEPH_OSD_OP_CLONERANGE:
440 case CEPH_OSD_OP_ASSERT_SRC_VERSION:
441 case CEPH_OSD_OP_SRC_CMPXATTR:
442 case CEPH_OSD_OP_GETXATTR:
443 case CEPH_OSD_OP_GETXATTRS:
444 case CEPH_OSD_OP_CMPXATTR:
445 case CEPH_OSD_OP_SETXATTR:
446 case CEPH_OSD_OP_SETXATTRS:
447 case CEPH_OSD_OP_RESETXATTRS:
448 case CEPH_OSD_OP_RMXATTR:
449 case CEPH_OSD_OP_PULL:
450 case CEPH_OSD_OP_PUSH:
451 case CEPH_OSD_OP_BALANCEREADS:
452 case CEPH_OSD_OP_UNBALANCEREADS:
453 case CEPH_OSD_OP_SCRUB:
454 case CEPH_OSD_OP_SCRUB_RESERVE:
455 case CEPH_OSD_OP_SCRUB_UNRESERVE:
456 case CEPH_OSD_OP_SCRUB_STOP:
457 case CEPH_OSD_OP_SCRUB_MAP:
458 case CEPH_OSD_OP_WRLOCK:
459 case CEPH_OSD_OP_WRUNLOCK:
460 case CEPH_OSD_OP_RDLOCK:
461 case CEPH_OSD_OP_RDUNLOCK:
462 case CEPH_OSD_OP_UPLOCK:
463 case CEPH_OSD_OP_DNLOCK:
464 case CEPH_OSD_OP_CALL:
465 case CEPH_OSD_OP_PGLS:
466 case CEPH_OSD_OP_PGLS_FILTER:
467 return true;
468 default:
469 return false;
470 }
471 }
472
473 /*
474 * This is an osd op init function for opcodes that have no data or
475 * other information associated with them. It also serves as a
476 * common init routine for all the other init functions, below.
477 */
478 static struct ceph_osd_req_op *
479 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
480 u16 opcode)
481 {
482 struct ceph_osd_req_op *op;
483
484 BUG_ON(which >= osd_req->r_num_ops);
485 BUG_ON(!osd_req_opcode_valid(opcode));
486
487 op = &osd_req->r_ops[which];
488 memset(op, 0, sizeof (*op));
489 op->op = opcode;
490
491 return op;
492 }
493
494 void osd_req_op_init(struct ceph_osd_request *osd_req,
495 unsigned int which, u16 opcode)
496 {
497 (void)_osd_req_op_init(osd_req, which, opcode);
498 }
499 EXPORT_SYMBOL(osd_req_op_init);
500
501 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
502 unsigned int which, u16 opcode,
503 u64 offset, u64 length,
504 u64 truncate_size, u32 truncate_seq)
505 {
506 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
507 size_t payload_len = 0;
508
509 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
510 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
511 opcode != CEPH_OSD_OP_TRUNCATE);
512
513 op->extent.offset = offset;
514 op->extent.length = length;
515 op->extent.truncate_size = truncate_size;
516 op->extent.truncate_seq = truncate_seq;
517 if (opcode == CEPH_OSD_OP_WRITE)
518 payload_len += length;
519
520 op->payload_len = payload_len;
521 }
522 EXPORT_SYMBOL(osd_req_op_extent_init);
523
524 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
525 unsigned int which, u64 length)
526 {
527 struct ceph_osd_req_op *op;
528 u64 previous;
529
530 BUG_ON(which >= osd_req->r_num_ops);
531 op = &osd_req->r_ops[which];
532 previous = op->extent.length;
533
534 if (length == previous)
535 return; /* Nothing to do */
536 BUG_ON(length > previous);
537
538 op->extent.length = length;
539 op->payload_len -= previous - length;
540 }
541 EXPORT_SYMBOL(osd_req_op_extent_update);
542
543 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
544 u16 opcode, const char *class, const char *method)
545 {
546 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
547 struct ceph_pagelist *pagelist;
548 size_t payload_len = 0;
549 size_t size;
550
551 BUG_ON(opcode != CEPH_OSD_OP_CALL);
552
553 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
554 BUG_ON(!pagelist);
555 ceph_pagelist_init(pagelist);
556
557 op->cls.class_name = class;
558 size = strlen(class);
559 BUG_ON(size > (size_t) U8_MAX);
560 op->cls.class_len = size;
561 ceph_pagelist_append(pagelist, class, size);
562 payload_len += size;
563
564 op->cls.method_name = method;
565 size = strlen(method);
566 BUG_ON(size > (size_t) U8_MAX);
567 op->cls.method_len = size;
568 ceph_pagelist_append(pagelist, method, size);
569 payload_len += size;
570
571 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
572
573 op->cls.argc = 0; /* currently unused */
574
575 op->payload_len = payload_len;
576 }
577 EXPORT_SYMBOL(osd_req_op_cls_init);
578
579 void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
580 unsigned int which, u16 opcode,
581 u64 cookie, u64 version, int flag)
582 {
583 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
584
585 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
586
587 op->watch.cookie = cookie;
588 op->watch.ver = version;
589 if (opcode == CEPH_OSD_OP_WATCH && flag)
590 op->watch.flag = (u8)1;
591 }
592 EXPORT_SYMBOL(osd_req_op_watch_init);
593
594 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
595 struct ceph_osd_data *osd_data)
596 {
597 u64 length = ceph_osd_data_length(osd_data);
598
599 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
600 BUG_ON(length > (u64) SIZE_MAX);
601 if (length)
602 ceph_msg_data_add_pages(msg, osd_data->pages,
603 length, osd_data->alignment);
604 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
605 BUG_ON(!length);
606 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
607 #ifdef CONFIG_BLOCK
608 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
609 ceph_msg_data_add_bio(msg, osd_data->bio, length);
610 #endif
611 } else {
612 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
613 }
614 }
615
616 static u64 osd_req_encode_op(struct ceph_osd_request *req,
617 struct ceph_osd_op *dst, unsigned int which)
618 {
619 struct ceph_osd_req_op *src;
620 struct ceph_osd_data *osd_data;
621 u64 request_data_len = 0;
622 u64 data_length;
623
624 BUG_ON(which >= req->r_num_ops);
625 src = &req->r_ops[which];
626 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
627 pr_err("unrecognized osd opcode %d\n", src->op);
628
629 return 0;
630 }
631
632 switch (src->op) {
633 case CEPH_OSD_OP_STAT:
634 osd_data = &src->raw_data_in;
635 ceph_osdc_msg_data_add(req->r_reply, osd_data);
636 break;
637 case CEPH_OSD_OP_READ:
638 case CEPH_OSD_OP_WRITE:
639 case CEPH_OSD_OP_ZERO:
640 case CEPH_OSD_OP_DELETE:
641 case CEPH_OSD_OP_TRUNCATE:
642 if (src->op == CEPH_OSD_OP_WRITE)
643 request_data_len = src->extent.length;
644 dst->extent.offset = cpu_to_le64(src->extent.offset);
645 dst->extent.length = cpu_to_le64(src->extent.length);
646 dst->extent.truncate_size =
647 cpu_to_le64(src->extent.truncate_size);
648 dst->extent.truncate_seq =
649 cpu_to_le32(src->extent.truncate_seq);
650 osd_data = &src->extent.osd_data;
651 if (src->op == CEPH_OSD_OP_WRITE)
652 ceph_osdc_msg_data_add(req->r_request, osd_data);
653 else
654 ceph_osdc_msg_data_add(req->r_reply, osd_data);
655 break;
656 case CEPH_OSD_OP_CALL:
657 dst->cls.class_len = src->cls.class_len;
658 dst->cls.method_len = src->cls.method_len;
659 osd_data = &src->cls.request_info;
660 ceph_osdc_msg_data_add(req->r_request, osd_data);
661 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
662 request_data_len = osd_data->pagelist->length;
663
664 osd_data = &src->cls.request_data;
665 data_length = ceph_osd_data_length(osd_data);
666 if (data_length) {
667 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
668 dst->cls.indata_len = cpu_to_le32(data_length);
669 ceph_osdc_msg_data_add(req->r_request, osd_data);
670 src->payload_len += data_length;
671 request_data_len += data_length;
672 }
673 osd_data = &src->cls.response_data;
674 ceph_osdc_msg_data_add(req->r_reply, osd_data);
675 break;
676 case CEPH_OSD_OP_STARTSYNC:
677 break;
678 case CEPH_OSD_OP_NOTIFY_ACK:
679 case CEPH_OSD_OP_WATCH:
680 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
681 dst->watch.ver = cpu_to_le64(src->watch.ver);
682 dst->watch.flag = src->watch.flag;
683 break;
684 default:
685 pr_err("unsupported osd opcode %s\n",
686 ceph_osd_op_name(src->op));
687 WARN_ON(1);
688
689 return 0;
690 }
691 dst->op = cpu_to_le16(src->op);
692 dst->payload_len = cpu_to_le32(src->payload_len);
693
694 return request_data_len;
695 }
696
697 /*
698 * build new request AND message, calculate layout, and adjust file
699 * extent as needed.
700 *
701 * if the file was recently truncated, we include information about its
702 * old and new size so that the object can be updated appropriately. (we
703 * avoid synchronously deleting truncated objects because it's slow.)
704 *
705 * if @do_sync, include a 'startsync' command so that the osd will flush
706 * data quickly.
707 */
708 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
709 struct ceph_file_layout *layout,
710 struct ceph_vino vino,
711 u64 off, u64 *plen, int num_ops,
712 int opcode, int flags,
713 struct ceph_snap_context *snapc,
714 u32 truncate_seq,
715 u64 truncate_size,
716 bool use_mempool)
717 {
718 struct ceph_osd_request *req;
719 u64 objnum = 0;
720 u64 objoff = 0;
721 u64 objlen = 0;
722 u32 object_size;
723 u64 object_base;
724 int r;
725
726 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
727 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
728 opcode != CEPH_OSD_OP_TRUNCATE);
729
730 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
731 GFP_NOFS);
732 if (!req)
733 return ERR_PTR(-ENOMEM);
734
735 req->r_flags = flags;
736
737 /* calculate max write size */
738 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
739 if (r < 0) {
740 ceph_osdc_put_request(req);
741 return ERR_PTR(r);
742 }
743
744 object_size = le32_to_cpu(layout->fl_object_size);
745 object_base = off - objoff;
746 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
747 if (truncate_size <= object_base) {
748 truncate_size = 0;
749 } else {
750 truncate_size -= object_base;
751 if (truncate_size > object_size)
752 truncate_size = object_size;
753 }
754 }
755
756 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
757 truncate_size, truncate_seq);
758
759 /*
760 * A second op in the ops array means the caller wants to
761 * also issue a include a 'startsync' command so that the
762 * osd will flush data quickly.
763 */
764 if (num_ops > 1)
765 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
766
767 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
768
769 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
770 "%llx.%08llx", vino.ino, objnum);
771 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
772
773 return req;
774 }
775 EXPORT_SYMBOL(ceph_osdc_new_request);
776
777 /*
778 * We keep osd requests in an rbtree, sorted by ->r_tid.
779 */
780 static void __insert_request(struct ceph_osd_client *osdc,
781 struct ceph_osd_request *new)
782 {
783 struct rb_node **p = &osdc->requests.rb_node;
784 struct rb_node *parent = NULL;
785 struct ceph_osd_request *req = NULL;
786
787 while (*p) {
788 parent = *p;
789 req = rb_entry(parent, struct ceph_osd_request, r_node);
790 if (new->r_tid < req->r_tid)
791 p = &(*p)->rb_left;
792 else if (new->r_tid > req->r_tid)
793 p = &(*p)->rb_right;
794 else
795 BUG();
796 }
797
798 rb_link_node(&new->r_node, parent, p);
799 rb_insert_color(&new->r_node, &osdc->requests);
800 }
801
802 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
803 u64 tid)
804 {
805 struct ceph_osd_request *req;
806 struct rb_node *n = osdc->requests.rb_node;
807
808 while (n) {
809 req = rb_entry(n, struct ceph_osd_request, r_node);
810 if (tid < req->r_tid)
811 n = n->rb_left;
812 else if (tid > req->r_tid)
813 n = n->rb_right;
814 else
815 return req;
816 }
817 return NULL;
818 }
819
820 static struct ceph_osd_request *
821 __lookup_request_ge(struct ceph_osd_client *osdc,
822 u64 tid)
823 {
824 struct ceph_osd_request *req;
825 struct rb_node *n = osdc->requests.rb_node;
826
827 while (n) {
828 req = rb_entry(n, struct ceph_osd_request, r_node);
829 if (tid < req->r_tid) {
830 if (!n->rb_left)
831 return req;
832 n = n->rb_left;
833 } else if (tid > req->r_tid) {
834 n = n->rb_right;
835 } else {
836 return req;
837 }
838 }
839 return NULL;
840 }
841
842 /*
843 * Resubmit requests pending on the given osd.
844 */
845 static void __kick_osd_requests(struct ceph_osd_client *osdc,
846 struct ceph_osd *osd)
847 {
848 struct ceph_osd_request *req, *nreq;
849 LIST_HEAD(resend);
850 int err;
851
852 dout("__kick_osd_requests osd%d\n", osd->o_osd);
853 err = __reset_osd(osdc, osd);
854 if (err)
855 return;
856 /*
857 * Build up a list of requests to resend by traversing the
858 * osd's list of requests. Requests for a given object are
859 * sent in tid order, and that is also the order they're
860 * kept on this list. Therefore all requests that are in
861 * flight will be found first, followed by all requests that
862 * have not yet been sent. And to resend requests while
863 * preserving this order we will want to put any sent
864 * requests back on the front of the osd client's unsent
865 * list.
866 *
867 * So we build a separate ordered list of already-sent
868 * requests for the affected osd and splice it onto the
869 * front of the osd client's unsent list. Once we've seen a
870 * request that has not yet been sent we're done. Those
871 * requests are already sitting right where they belong.
872 */
873 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
874 if (!req->r_sent)
875 break;
876 list_move_tail(&req->r_req_lru_item, &resend);
877 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
878 osd->o_osd);
879 if (!req->r_linger)
880 req->r_flags |= CEPH_OSD_FLAG_RETRY;
881 }
882 list_splice(&resend, &osdc->req_unsent);
883
884 /*
885 * Linger requests are re-registered before sending, which
886 * sets up a new tid for each. We add them to the unsent
887 * list at the end to keep things in tid order.
888 */
889 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
890 r_linger_osd) {
891 /*
892 * reregister request prior to unregistering linger so
893 * that r_osd is preserved.
894 */
895 BUG_ON(!list_empty(&req->r_req_lru_item));
896 __register_request(osdc, req);
897 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
898 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
899 __unregister_linger_request(osdc, req);
900 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
901 osd->o_osd);
902 }
903 }
904
905 /*
906 * If the osd connection drops, we need to resubmit all requests.
907 */
908 static void osd_reset(struct ceph_connection *con)
909 {
910 struct ceph_osd *osd = con->private;
911 struct ceph_osd_client *osdc;
912
913 if (!osd)
914 return;
915 dout("osd_reset osd%d\n", osd->o_osd);
916 osdc = osd->o_osdc;
917 down_read(&osdc->map_sem);
918 mutex_lock(&osdc->request_mutex);
919 __kick_osd_requests(osdc, osd);
920 __send_queued(osdc);
921 mutex_unlock(&osdc->request_mutex);
922 up_read(&osdc->map_sem);
923 }
924
925 /*
926 * Track open sessions with osds.
927 */
928 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
929 {
930 struct ceph_osd *osd;
931
932 osd = kzalloc(sizeof(*osd), GFP_NOFS);
933 if (!osd)
934 return NULL;
935
936 atomic_set(&osd->o_ref, 1);
937 osd->o_osdc = osdc;
938 osd->o_osd = onum;
939 RB_CLEAR_NODE(&osd->o_node);
940 INIT_LIST_HEAD(&osd->o_requests);
941 INIT_LIST_HEAD(&osd->o_linger_requests);
942 INIT_LIST_HEAD(&osd->o_osd_lru);
943 osd->o_incarnation = 1;
944
945 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
946
947 INIT_LIST_HEAD(&osd->o_keepalive_item);
948 return osd;
949 }
950
951 static struct ceph_osd *get_osd(struct ceph_osd *osd)
952 {
953 if (atomic_inc_not_zero(&osd->o_ref)) {
954 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
955 atomic_read(&osd->o_ref));
956 return osd;
957 } else {
958 dout("get_osd %p FAIL\n", osd);
959 return NULL;
960 }
961 }
962
963 static void put_osd(struct ceph_osd *osd)
964 {
965 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
966 atomic_read(&osd->o_ref) - 1);
967 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
968 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
969
970 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
971 kfree(osd);
972 }
973 }
974
975 /*
976 * remove an osd from our map
977 */
978 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
979 {
980 dout("__remove_osd %p\n", osd);
981 BUG_ON(!list_empty(&osd->o_requests));
982 rb_erase(&osd->o_node, &osdc->osds);
983 list_del_init(&osd->o_osd_lru);
984 ceph_con_close(&osd->o_con);
985 put_osd(osd);
986 }
987
988 static void remove_all_osds(struct ceph_osd_client *osdc)
989 {
990 dout("%s %p\n", __func__, osdc);
991 mutex_lock(&osdc->request_mutex);
992 while (!RB_EMPTY_ROOT(&osdc->osds)) {
993 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
994 struct ceph_osd, o_node);
995 __remove_osd(osdc, osd);
996 }
997 mutex_unlock(&osdc->request_mutex);
998 }
999
1000 static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1001 struct ceph_osd *osd)
1002 {
1003 dout("__move_osd_to_lru %p\n", osd);
1004 BUG_ON(!list_empty(&osd->o_osd_lru));
1005 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1006 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
1007 }
1008
1009 static void __remove_osd_from_lru(struct ceph_osd *osd)
1010 {
1011 dout("__remove_osd_from_lru %p\n", osd);
1012 if (!list_empty(&osd->o_osd_lru))
1013 list_del_init(&osd->o_osd_lru);
1014 }
1015
1016 static void remove_old_osds(struct ceph_osd_client *osdc)
1017 {
1018 struct ceph_osd *osd, *nosd;
1019
1020 dout("__remove_old_osds %p\n", osdc);
1021 mutex_lock(&osdc->request_mutex);
1022 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1023 if (time_before(jiffies, osd->lru_ttl))
1024 break;
1025 __remove_osd(osdc, osd);
1026 }
1027 mutex_unlock(&osdc->request_mutex);
1028 }
1029
1030 /*
1031 * reset osd connect
1032 */
1033 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1034 {
1035 struct ceph_entity_addr *peer_addr;
1036
1037 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1038 if (list_empty(&osd->o_requests) &&
1039 list_empty(&osd->o_linger_requests)) {
1040 __remove_osd(osdc, osd);
1041
1042 return -ENODEV;
1043 }
1044
1045 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1046 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1047 !ceph_con_opened(&osd->o_con)) {
1048 struct ceph_osd_request *req;
1049
1050 dout("osd addr hasn't changed and connection never opened, "
1051 "letting msgr retry\n");
1052 /* touch each r_stamp for handle_timeout()'s benfit */
1053 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1054 req->r_stamp = jiffies;
1055
1056 return -EAGAIN;
1057 }
1058
1059 ceph_con_close(&osd->o_con);
1060 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1061 osd->o_incarnation++;
1062
1063 return 0;
1064 }
1065
1066 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1067 {
1068 struct rb_node **p = &osdc->osds.rb_node;
1069 struct rb_node *parent = NULL;
1070 struct ceph_osd *osd = NULL;
1071
1072 dout("__insert_osd %p osd%d\n", new, new->o_osd);
1073 while (*p) {
1074 parent = *p;
1075 osd = rb_entry(parent, struct ceph_osd, o_node);
1076 if (new->o_osd < osd->o_osd)
1077 p = &(*p)->rb_left;
1078 else if (new->o_osd > osd->o_osd)
1079 p = &(*p)->rb_right;
1080 else
1081 BUG();
1082 }
1083
1084 rb_link_node(&new->o_node, parent, p);
1085 rb_insert_color(&new->o_node, &osdc->osds);
1086 }
1087
1088 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1089 {
1090 struct ceph_osd *osd;
1091 struct rb_node *n = osdc->osds.rb_node;
1092
1093 while (n) {
1094 osd = rb_entry(n, struct ceph_osd, o_node);
1095 if (o < osd->o_osd)
1096 n = n->rb_left;
1097 else if (o > osd->o_osd)
1098 n = n->rb_right;
1099 else
1100 return osd;
1101 }
1102 return NULL;
1103 }
1104
1105 static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1106 {
1107 schedule_delayed_work(&osdc->timeout_work,
1108 osdc->client->options->osd_keepalive_timeout * HZ);
1109 }
1110
1111 static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1112 {
1113 cancel_delayed_work(&osdc->timeout_work);
1114 }
1115
1116 /*
1117 * Register request, assign tid. If this is the first request, set up
1118 * the timeout event.
1119 */
1120 static void __register_request(struct ceph_osd_client *osdc,
1121 struct ceph_osd_request *req)
1122 {
1123 req->r_tid = ++osdc->last_tid;
1124 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1125 dout("__register_request %p tid %lld\n", req, req->r_tid);
1126 __insert_request(osdc, req);
1127 ceph_osdc_get_request(req);
1128 osdc->num_requests++;
1129 if (osdc->num_requests == 1) {
1130 dout(" first request, scheduling timeout\n");
1131 __schedule_osd_timeout(osdc);
1132 }
1133 }
1134
1135 /*
1136 * called under osdc->request_mutex
1137 */
1138 static void __unregister_request(struct ceph_osd_client *osdc,
1139 struct ceph_osd_request *req)
1140 {
1141 if (RB_EMPTY_NODE(&req->r_node)) {
1142 dout("__unregister_request %p tid %lld not registered\n",
1143 req, req->r_tid);
1144 return;
1145 }
1146
1147 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1148 rb_erase(&req->r_node, &osdc->requests);
1149 osdc->num_requests--;
1150
1151 if (req->r_osd) {
1152 /* make sure the original request isn't in flight. */
1153 ceph_msg_revoke(req->r_request);
1154
1155 list_del_init(&req->r_osd_item);
1156 if (list_empty(&req->r_osd->o_requests) &&
1157 list_empty(&req->r_osd->o_linger_requests)) {
1158 dout("moving osd to %p lru\n", req->r_osd);
1159 __move_osd_to_lru(osdc, req->r_osd);
1160 }
1161 if (list_empty(&req->r_linger_item))
1162 req->r_osd = NULL;
1163 }
1164
1165 list_del_init(&req->r_req_lru_item);
1166 ceph_osdc_put_request(req);
1167
1168 if (osdc->num_requests == 0) {
1169 dout(" no requests, canceling timeout\n");
1170 __cancel_osd_timeout(osdc);
1171 }
1172 }
1173
1174 /*
1175 * Cancel a previously queued request message
1176 */
1177 static void __cancel_request(struct ceph_osd_request *req)
1178 {
1179 if (req->r_sent && req->r_osd) {
1180 ceph_msg_revoke(req->r_request);
1181 req->r_sent = 0;
1182 }
1183 }
1184
1185 static void __register_linger_request(struct ceph_osd_client *osdc,
1186 struct ceph_osd_request *req)
1187 {
1188 dout("__register_linger_request %p\n", req);
1189 ceph_osdc_get_request(req);
1190 list_add_tail(&req->r_linger_item, &osdc->req_linger);
1191 if (req->r_osd)
1192 list_add_tail(&req->r_linger_osd,
1193 &req->r_osd->o_linger_requests);
1194 }
1195
1196 static void __unregister_linger_request(struct ceph_osd_client *osdc,
1197 struct ceph_osd_request *req)
1198 {
1199 dout("__unregister_linger_request %p\n", req);
1200 list_del_init(&req->r_linger_item);
1201 if (req->r_osd) {
1202 list_del_init(&req->r_linger_osd);
1203
1204 if (list_empty(&req->r_osd->o_requests) &&
1205 list_empty(&req->r_osd->o_linger_requests)) {
1206 dout("moving osd to %p lru\n", req->r_osd);
1207 __move_osd_to_lru(osdc, req->r_osd);
1208 }
1209 if (list_empty(&req->r_osd_item))
1210 req->r_osd = NULL;
1211 }
1212 ceph_osdc_put_request(req);
1213 }
1214
1215 void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1216 struct ceph_osd_request *req)
1217 {
1218 mutex_lock(&osdc->request_mutex);
1219 if (req->r_linger) {
1220 req->r_linger = 0;
1221 __unregister_linger_request(osdc, req);
1222 }
1223 mutex_unlock(&osdc->request_mutex);
1224 }
1225 EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1226
1227 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1228 struct ceph_osd_request *req)
1229 {
1230 if (!req->r_linger) {
1231 dout("set_request_linger %p\n", req);
1232 req->r_linger = 1;
1233 }
1234 }
1235 EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1236
1237 /*
1238 * Returns whether a request should be blocked from being sent
1239 * based on the current osdmap and osd_client settings.
1240 *
1241 * Caller should hold map_sem for read.
1242 */
1243 static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1244 struct ceph_osd_request *req)
1245 {
1246 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1247 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1248 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1249 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1250 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1251 }
1252
1253 /*
1254 * Calculate mapping of a request to a PG. Takes tiering into account.
1255 */
1256 static int __calc_request_pg(struct ceph_osdmap *osdmap,
1257 struct ceph_osd_request *req,
1258 struct ceph_pg *pg_out)
1259 {
1260 bool need_check_tiering;
1261
1262 need_check_tiering = false;
1263 if (req->r_target_oloc.pool == -1) {
1264 req->r_target_oloc = req->r_base_oloc; /* struct */
1265 need_check_tiering = true;
1266 }
1267 if (req->r_target_oid.name_len == 0) {
1268 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1269 need_check_tiering = true;
1270 }
1271
1272 if (need_check_tiering &&
1273 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1274 struct ceph_pg_pool_info *pi;
1275
1276 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
1277 if (pi) {
1278 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1279 pi->read_tier >= 0)
1280 req->r_target_oloc.pool = pi->read_tier;
1281 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1282 pi->write_tier >= 0)
1283 req->r_target_oloc.pool = pi->write_tier;
1284 }
1285 /* !pi is caught in ceph_oloc_oid_to_pg() */
1286 }
1287
1288 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1289 &req->r_target_oid, pg_out);
1290 }
1291
1292 /*
1293 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1294 * (as needed), and set the request r_osd appropriately. If there is
1295 * no up osd, set r_osd to NULL. Move the request to the appropriate list
1296 * (unsent, homeless) or leave on in-flight lru.
1297 *
1298 * Return 0 if unchanged, 1 if changed, or negative on error.
1299 *
1300 * Caller should hold map_sem for read and request_mutex.
1301 */
1302 static int __map_request(struct ceph_osd_client *osdc,
1303 struct ceph_osd_request *req, int force_resend)
1304 {
1305 struct ceph_pg pgid;
1306 int acting[CEPH_PG_MAX_SIZE];
1307 int o = -1, num = 0;
1308 int err;
1309 bool was_paused;
1310
1311 dout("map_request %p tid %lld\n", req, req->r_tid);
1312
1313 err = __calc_request_pg(osdc->osdmap, req, &pgid);
1314 if (err) {
1315 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1316 return err;
1317 }
1318 req->r_pgid = pgid;
1319
1320 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1321 if (err > 0) {
1322 o = acting[0];
1323 num = err;
1324 }
1325
1326 was_paused = req->r_paused;
1327 req->r_paused = __req_should_be_paused(osdc, req);
1328 if (was_paused && !req->r_paused)
1329 force_resend = 1;
1330
1331 if ((!force_resend &&
1332 req->r_osd && req->r_osd->o_osd == o &&
1333 req->r_sent >= req->r_osd->o_incarnation &&
1334 req->r_num_pg_osds == num &&
1335 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
1336 (req->r_osd == NULL && o == -1) ||
1337 req->r_paused)
1338 return 0; /* no change */
1339
1340 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1341 req->r_tid, pgid.pool, pgid.seed, o,
1342 req->r_osd ? req->r_osd->o_osd : -1);
1343
1344 /* record full pg acting set */
1345 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1346 req->r_num_pg_osds = num;
1347
1348 if (req->r_osd) {
1349 __cancel_request(req);
1350 list_del_init(&req->r_osd_item);
1351 req->r_osd = NULL;
1352 }
1353
1354 req->r_osd = __lookup_osd(osdc, o);
1355 if (!req->r_osd && o >= 0) {
1356 err = -ENOMEM;
1357 req->r_osd = create_osd(osdc, o);
1358 if (!req->r_osd) {
1359 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1360 goto out;
1361 }
1362
1363 dout("map_request osd %p is osd%d\n", req->r_osd, o);
1364 __insert_osd(osdc, req->r_osd);
1365
1366 ceph_con_open(&req->r_osd->o_con,
1367 CEPH_ENTITY_TYPE_OSD, o,
1368 &osdc->osdmap->osd_addr[o]);
1369 }
1370
1371 if (req->r_osd) {
1372 __remove_osd_from_lru(req->r_osd);
1373 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1374 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1375 } else {
1376 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1377 }
1378 err = 1; /* osd or pg changed */
1379
1380 out:
1381 return err;
1382 }
1383
1384 /*
1385 * caller should hold map_sem (for read) and request_mutex
1386 */
1387 static void __send_request(struct ceph_osd_client *osdc,
1388 struct ceph_osd_request *req)
1389 {
1390 void *p;
1391
1392 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1393 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1394 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1395
1396 /* fill in message content that changes each time we send it */
1397 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1398 put_unaligned_le32(req->r_flags, req->r_request_flags);
1399 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1400 p = req->r_request_pgid;
1401 ceph_encode_64(&p, req->r_pgid.pool);
1402 ceph_encode_32(&p, req->r_pgid.seed);
1403 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1404 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1405 sizeof(req->r_reassert_version));
1406
1407 req->r_stamp = jiffies;
1408 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1409
1410 ceph_msg_get(req->r_request); /* send consumes a ref */
1411
1412 req->r_sent = req->r_osd->o_incarnation;
1413
1414 ceph_con_send(&req->r_osd->o_con, req->r_request);
1415 }
1416
1417 /*
1418 * Send any requests in the queue (req_unsent).
1419 */
1420 static void __send_queued(struct ceph_osd_client *osdc)
1421 {
1422 struct ceph_osd_request *req, *tmp;
1423
1424 dout("__send_queued\n");
1425 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1426 __send_request(osdc, req);
1427 }
1428
1429 /*
1430 * Caller should hold map_sem for read and request_mutex.
1431 */
1432 static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1433 struct ceph_osd_request *req,
1434 bool nofail)
1435 {
1436 int rc;
1437
1438 __register_request(osdc, req);
1439 req->r_sent = 0;
1440 req->r_got_reply = 0;
1441 rc = __map_request(osdc, req, 0);
1442 if (rc < 0) {
1443 if (nofail) {
1444 dout("osdc_start_request failed map, "
1445 " will retry %lld\n", req->r_tid);
1446 rc = 0;
1447 } else {
1448 __unregister_request(osdc, req);
1449 }
1450 return rc;
1451 }
1452
1453 if (req->r_osd == NULL) {
1454 dout("send_request %p no up osds in pg\n", req);
1455 ceph_monc_request_next_osdmap(&osdc->client->monc);
1456 } else {
1457 __send_queued(osdc);
1458 }
1459
1460 return 0;
1461 }
1462
1463 /*
1464 * Timeout callback, called every N seconds when 1 or more osd
1465 * requests has been active for more than N seconds. When this
1466 * happens, we ping all OSDs with requests who have timed out to
1467 * ensure any communications channel reset is detected. Reset the
1468 * request timeouts another N seconds in the future as we go.
1469 * Reschedule the timeout event another N seconds in future (unless
1470 * there are no open requests).
1471 */
1472 static void handle_timeout(struct work_struct *work)
1473 {
1474 struct ceph_osd_client *osdc =
1475 container_of(work, struct ceph_osd_client, timeout_work.work);
1476 struct ceph_osd_request *req;
1477 struct ceph_osd *osd;
1478 unsigned long keepalive =
1479 osdc->client->options->osd_keepalive_timeout * HZ;
1480 struct list_head slow_osds;
1481 dout("timeout\n");
1482 down_read(&osdc->map_sem);
1483
1484 ceph_monc_request_next_osdmap(&osdc->client->monc);
1485
1486 mutex_lock(&osdc->request_mutex);
1487
1488 /*
1489 * ping osds that are a bit slow. this ensures that if there
1490 * is a break in the TCP connection we will notice, and reopen
1491 * a connection with that osd (from the fault callback).
1492 */
1493 INIT_LIST_HEAD(&slow_osds);
1494 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
1495 if (time_before(jiffies, req->r_stamp + keepalive))
1496 break;
1497
1498 osd = req->r_osd;
1499 BUG_ON(!osd);
1500 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1501 req->r_tid, osd->o_osd);
1502 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1503 }
1504 while (!list_empty(&slow_osds)) {
1505 osd = list_entry(slow_osds.next, struct ceph_osd,
1506 o_keepalive_item);
1507 list_del_init(&osd->o_keepalive_item);
1508 ceph_con_keepalive(&osd->o_con);
1509 }
1510
1511 __schedule_osd_timeout(osdc);
1512 __send_queued(osdc);
1513 mutex_unlock(&osdc->request_mutex);
1514 up_read(&osdc->map_sem);
1515 }
1516
1517 static void handle_osds_timeout(struct work_struct *work)
1518 {
1519 struct ceph_osd_client *osdc =
1520 container_of(work, struct ceph_osd_client,
1521 osds_timeout_work.work);
1522 unsigned long delay =
1523 osdc->client->options->osd_idle_ttl * HZ >> 2;
1524
1525 dout("osds timeout\n");
1526 down_read(&osdc->map_sem);
1527 remove_old_osds(osdc);
1528 up_read(&osdc->map_sem);
1529
1530 schedule_delayed_work(&osdc->osds_timeout_work,
1531 round_jiffies_relative(delay));
1532 }
1533
1534 static int ceph_oloc_decode(void **p, void *end,
1535 struct ceph_object_locator *oloc)
1536 {
1537 u8 struct_v, struct_cv;
1538 u32 len;
1539 void *struct_end;
1540 int ret = 0;
1541
1542 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1543 struct_v = ceph_decode_8(p);
1544 struct_cv = ceph_decode_8(p);
1545 if (struct_v < 3) {
1546 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1547 struct_v, struct_cv);
1548 goto e_inval;
1549 }
1550 if (struct_cv > 6) {
1551 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1552 struct_v, struct_cv);
1553 goto e_inval;
1554 }
1555 len = ceph_decode_32(p);
1556 ceph_decode_need(p, end, len, e_inval);
1557 struct_end = *p + len;
1558
1559 oloc->pool = ceph_decode_64(p);
1560 *p += 4; /* skip preferred */
1561
1562 len = ceph_decode_32(p);
1563 if (len > 0) {
1564 pr_warn("ceph_object_locator::key is set\n");
1565 goto e_inval;
1566 }
1567
1568 if (struct_v >= 5) {
1569 len = ceph_decode_32(p);
1570 if (len > 0) {
1571 pr_warn("ceph_object_locator::nspace is set\n");
1572 goto e_inval;
1573 }
1574 }
1575
1576 if (struct_v >= 6) {
1577 s64 hash = ceph_decode_64(p);
1578 if (hash != -1) {
1579 pr_warn("ceph_object_locator::hash is set\n");
1580 goto e_inval;
1581 }
1582 }
1583
1584 /* skip the rest */
1585 *p = struct_end;
1586 out:
1587 return ret;
1588
1589 e_inval:
1590 ret = -EINVAL;
1591 goto out;
1592 }
1593
1594 static int ceph_redirect_decode(void **p, void *end,
1595 struct ceph_request_redirect *redir)
1596 {
1597 u8 struct_v, struct_cv;
1598 u32 len;
1599 void *struct_end;
1600 int ret;
1601
1602 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1603 struct_v = ceph_decode_8(p);
1604 struct_cv = ceph_decode_8(p);
1605 if (struct_cv > 1) {
1606 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1607 struct_v, struct_cv);
1608 goto e_inval;
1609 }
1610 len = ceph_decode_32(p);
1611 ceph_decode_need(p, end, len, e_inval);
1612 struct_end = *p + len;
1613
1614 ret = ceph_oloc_decode(p, end, &redir->oloc);
1615 if (ret)
1616 goto out;
1617
1618 len = ceph_decode_32(p);
1619 if (len > 0) {
1620 pr_warn("ceph_request_redirect::object_name is set\n");
1621 goto e_inval;
1622 }
1623
1624 len = ceph_decode_32(p);
1625 *p += len; /* skip osd_instructions */
1626
1627 /* skip the rest */
1628 *p = struct_end;
1629 out:
1630 return ret;
1631
1632 e_inval:
1633 ret = -EINVAL;
1634 goto out;
1635 }
1636
1637 static void complete_request(struct ceph_osd_request *req)
1638 {
1639 complete_all(&req->r_safe_completion); /* fsync waiter */
1640 }
1641
1642 /*
1643 * handle osd op reply. either call the callback if it is specified,
1644 * or do the completion to wake up the waiting thread.
1645 */
1646 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1647 struct ceph_connection *con)
1648 {
1649 void *p, *end;
1650 struct ceph_osd_request *req;
1651 struct ceph_request_redirect redir;
1652 u64 tid;
1653 int object_len;
1654 unsigned int numops;
1655 int payload_len, flags;
1656 s32 result;
1657 s32 retry_attempt;
1658 struct ceph_pg pg;
1659 int err;
1660 u32 reassert_epoch;
1661 u64 reassert_version;
1662 u32 osdmap_epoch;
1663 int already_completed;
1664 u32 bytes;
1665 unsigned int i;
1666
1667 tid = le64_to_cpu(msg->hdr.tid);
1668 dout("handle_reply %p tid %llu\n", msg, tid);
1669
1670 p = msg->front.iov_base;
1671 end = p + msg->front.iov_len;
1672
1673 ceph_decode_need(&p, end, 4, bad);
1674 object_len = ceph_decode_32(&p);
1675 ceph_decode_need(&p, end, object_len, bad);
1676 p += object_len;
1677
1678 err = ceph_decode_pgid(&p, end, &pg);
1679 if (err)
1680 goto bad;
1681
1682 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1683 flags = ceph_decode_64(&p);
1684 result = ceph_decode_32(&p);
1685 reassert_epoch = ceph_decode_32(&p);
1686 reassert_version = ceph_decode_64(&p);
1687 osdmap_epoch = ceph_decode_32(&p);
1688
1689 /* lookup */
1690 down_read(&osdc->map_sem);
1691 mutex_lock(&osdc->request_mutex);
1692 req = __lookup_request(osdc, tid);
1693 if (req == NULL) {
1694 dout("handle_reply tid %llu dne\n", tid);
1695 goto bad_mutex;
1696 }
1697 ceph_osdc_get_request(req);
1698
1699 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1700 req, result);
1701
1702 ceph_decode_need(&p, end, 4, bad_put);
1703 numops = ceph_decode_32(&p);
1704 if (numops > CEPH_OSD_MAX_OP)
1705 goto bad_put;
1706 if (numops != req->r_num_ops)
1707 goto bad_put;
1708 payload_len = 0;
1709 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1710 for (i = 0; i < numops; i++) {
1711 struct ceph_osd_op *op = p;
1712 int len;
1713
1714 len = le32_to_cpu(op->payload_len);
1715 req->r_reply_op_len[i] = len;
1716 dout(" op %d has %d bytes\n", i, len);
1717 payload_len += len;
1718 p += sizeof(*op);
1719 }
1720 bytes = le32_to_cpu(msg->hdr.data_len);
1721 if (payload_len != bytes) {
1722 pr_warning("sum of op payload lens %d != data_len %d",
1723 payload_len, bytes);
1724 goto bad_put;
1725 }
1726
1727 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1728 retry_attempt = ceph_decode_32(&p);
1729 for (i = 0; i < numops; i++)
1730 req->r_reply_op_result[i] = ceph_decode_32(&p);
1731
1732 if (le16_to_cpu(msg->hdr.version) >= 6) {
1733 p += 8 + 4; /* skip replay_version */
1734 p += 8; /* skip user_version */
1735
1736 err = ceph_redirect_decode(&p, end, &redir);
1737 if (err)
1738 goto bad_put;
1739 } else {
1740 redir.oloc.pool = -1;
1741 }
1742
1743 if (redir.oloc.pool != -1) {
1744 dout("redirect pool %lld\n", redir.oloc.pool);
1745
1746 __unregister_request(osdc, req);
1747
1748 req->r_target_oloc = redir.oloc; /* struct */
1749
1750 /*
1751 * Start redirect requests with nofail=true. If
1752 * mapping fails, request will end up on the notarget
1753 * list, waiting for the new osdmap (which can take
1754 * a while), even though the original request mapped
1755 * successfully. In the future we might want to follow
1756 * original request's nofail setting here.
1757 */
1758 err = __ceph_osdc_start_request(osdc, req, true);
1759 BUG_ON(err);
1760
1761 goto out_unlock;
1762 }
1763
1764 already_completed = req->r_got_reply;
1765 if (!req->r_got_reply) {
1766 req->r_result = result;
1767 dout("handle_reply result %d bytes %d\n", req->r_result,
1768 bytes);
1769 if (req->r_result == 0)
1770 req->r_result = bytes;
1771
1772 /* in case this is a write and we need to replay, */
1773 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1774 req->r_reassert_version.version = cpu_to_le64(reassert_version);
1775
1776 req->r_got_reply = 1;
1777 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1778 dout("handle_reply tid %llu dup ack\n", tid);
1779 goto out_unlock;
1780 }
1781
1782 dout("handle_reply tid %llu flags %d\n", tid, flags);
1783
1784 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1785 __register_linger_request(osdc, req);
1786
1787 /* either this is a read, or we got the safe response */
1788 if (result < 0 ||
1789 (flags & CEPH_OSD_FLAG_ONDISK) ||
1790 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1791 __unregister_request(osdc, req);
1792
1793 mutex_unlock(&osdc->request_mutex);
1794 up_read(&osdc->map_sem);
1795
1796 if (!already_completed) {
1797 if (req->r_unsafe_callback &&
1798 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1799 req->r_unsafe_callback(req, true);
1800 if (req->r_callback)
1801 req->r_callback(req, msg);
1802 else
1803 complete_all(&req->r_completion);
1804 }
1805
1806 if (flags & CEPH_OSD_FLAG_ONDISK) {
1807 if (req->r_unsafe_callback && already_completed)
1808 req->r_unsafe_callback(req, false);
1809 complete_request(req);
1810 }
1811
1812 out:
1813 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
1814 ceph_osdc_put_request(req);
1815 return;
1816 out_unlock:
1817 mutex_unlock(&osdc->request_mutex);
1818 up_read(&osdc->map_sem);
1819 goto out;
1820
1821 bad_put:
1822 req->r_result = -EIO;
1823 __unregister_request(osdc, req);
1824 if (req->r_callback)
1825 req->r_callback(req, msg);
1826 else
1827 complete_all(&req->r_completion);
1828 complete_request(req);
1829 ceph_osdc_put_request(req);
1830 bad_mutex:
1831 mutex_unlock(&osdc->request_mutex);
1832 up_read(&osdc->map_sem);
1833 bad:
1834 pr_err("corrupt osd_op_reply got %d %d\n",
1835 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1836 ceph_msg_dump(msg);
1837 }
1838
1839 static void reset_changed_osds(struct ceph_osd_client *osdc)
1840 {
1841 struct rb_node *p, *n;
1842
1843 for (p = rb_first(&osdc->osds); p; p = n) {
1844 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
1845
1846 n = rb_next(p);
1847 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1848 memcmp(&osd->o_con.peer_addr,
1849 ceph_osd_addr(osdc->osdmap,
1850 osd->o_osd),
1851 sizeof(struct ceph_entity_addr)) != 0)
1852 __reset_osd(osdc, osd);
1853 }
1854 }
1855
1856 /*
1857 * Requeue requests whose mapping to an OSD has changed. If requests map to
1858 * no osd, request a new map.
1859 *
1860 * Caller should hold map_sem for read.
1861 */
1862 static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1863 bool force_resend_writes)
1864 {
1865 struct ceph_osd_request *req, *nreq;
1866 struct rb_node *p;
1867 int needmap = 0;
1868 int err;
1869 bool force_resend_req;
1870
1871 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1872 force_resend_writes ? " (force resend writes)" : "");
1873 mutex_lock(&osdc->request_mutex);
1874 for (p = rb_first(&osdc->requests); p; ) {
1875 req = rb_entry(p, struct ceph_osd_request, r_node);
1876 p = rb_next(p);
1877
1878 /*
1879 * For linger requests that have not yet been
1880 * registered, move them to the linger list; they'll
1881 * be sent to the osd in the loop below. Unregister
1882 * the request before re-registering it as a linger
1883 * request to ensure the __map_request() below
1884 * will decide it needs to be sent.
1885 */
1886 if (req->r_linger && list_empty(&req->r_linger_item)) {
1887 dout("%p tid %llu restart on osd%d\n",
1888 req, req->r_tid,
1889 req->r_osd ? req->r_osd->o_osd : -1);
1890 ceph_osdc_get_request(req);
1891 __unregister_request(osdc, req);
1892 __register_linger_request(osdc, req);
1893 ceph_osdc_put_request(req);
1894 continue;
1895 }
1896
1897 force_resend_req = force_resend ||
1898 (force_resend_writes &&
1899 req->r_flags & CEPH_OSD_FLAG_WRITE);
1900 err = __map_request(osdc, req, force_resend_req);
1901 if (err < 0)
1902 continue; /* error */
1903 if (req->r_osd == NULL) {
1904 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1905 needmap++; /* request a newer map */
1906 } else if (err > 0) {
1907 if (!req->r_linger) {
1908 dout("%p tid %llu requeued on osd%d\n", req,
1909 req->r_tid,
1910 req->r_osd ? req->r_osd->o_osd : -1);
1911 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1912 }
1913 }
1914 }
1915
1916 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1917 r_linger_item) {
1918 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1919
1920 err = __map_request(osdc, req,
1921 force_resend || force_resend_writes);
1922 dout("__map_request returned %d\n", err);
1923 if (err == 0)
1924 continue; /* no change and no osd was specified */
1925 if (err < 0)
1926 continue; /* hrm! */
1927 if (req->r_osd == NULL) {
1928 dout("tid %llu maps to no valid osd\n", req->r_tid);
1929 needmap++; /* request a newer map */
1930 continue;
1931 }
1932
1933 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1934 req->r_osd ? req->r_osd->o_osd : -1);
1935 __register_request(osdc, req);
1936 __unregister_linger_request(osdc, req);
1937 }
1938 reset_changed_osds(osdc);
1939 mutex_unlock(&osdc->request_mutex);
1940
1941 if (needmap) {
1942 dout("%d requests for down osds, need new map\n", needmap);
1943 ceph_monc_request_next_osdmap(&osdc->client->monc);
1944 }
1945 }
1946
1947
1948 /*
1949 * Process updated osd map.
1950 *
1951 * The message contains any number of incremental and full maps, normally
1952 * indicating some sort of topology change in the cluster. Kick requests
1953 * off to different OSDs as needed.
1954 */
1955 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1956 {
1957 void *p, *end, *next;
1958 u32 nr_maps, maplen;
1959 u32 epoch;
1960 struct ceph_osdmap *newmap = NULL, *oldmap;
1961 int err;
1962 struct ceph_fsid fsid;
1963 bool was_full;
1964
1965 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1966 p = msg->front.iov_base;
1967 end = p + msg->front.iov_len;
1968
1969 /* verify fsid */
1970 ceph_decode_need(&p, end, sizeof(fsid), bad);
1971 ceph_decode_copy(&p, &fsid, sizeof(fsid));
1972 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1973 return;
1974
1975 down_write(&osdc->map_sem);
1976
1977 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1978
1979 /* incremental maps */
1980 ceph_decode_32_safe(&p, end, nr_maps, bad);
1981 dout(" %d inc maps\n", nr_maps);
1982 while (nr_maps > 0) {
1983 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1984 epoch = ceph_decode_32(&p);
1985 maplen = ceph_decode_32(&p);
1986 ceph_decode_need(&p, end, maplen, bad);
1987 next = p + maplen;
1988 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1989 dout("applying incremental map %u len %d\n",
1990 epoch, maplen);
1991 newmap = osdmap_apply_incremental(&p, next,
1992 osdc->osdmap,
1993 &osdc->client->msgr);
1994 if (IS_ERR(newmap)) {
1995 err = PTR_ERR(newmap);
1996 goto bad;
1997 }
1998 BUG_ON(!newmap);
1999 if (newmap != osdc->osdmap) {
2000 ceph_osdmap_destroy(osdc->osdmap);
2001 osdc->osdmap = newmap;
2002 }
2003 was_full = was_full ||
2004 ceph_osdmap_flag(osdc->osdmap,
2005 CEPH_OSDMAP_FULL);
2006 kick_requests(osdc, 0, was_full);
2007 } else {
2008 dout("ignoring incremental map %u len %d\n",
2009 epoch, maplen);
2010 }
2011 p = next;
2012 nr_maps--;
2013 }
2014 if (newmap)
2015 goto done;
2016
2017 /* full maps */
2018 ceph_decode_32_safe(&p, end, nr_maps, bad);
2019 dout(" %d full maps\n", nr_maps);
2020 while (nr_maps) {
2021 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
2022 epoch = ceph_decode_32(&p);
2023 maplen = ceph_decode_32(&p);
2024 ceph_decode_need(&p, end, maplen, bad);
2025 if (nr_maps > 1) {
2026 dout("skipping non-latest full map %u len %d\n",
2027 epoch, maplen);
2028 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2029 dout("skipping full map %u len %d, "
2030 "older than our %u\n", epoch, maplen,
2031 osdc->osdmap->epoch);
2032 } else {
2033 int skipped_map = 0;
2034
2035 dout("taking full map %u len %d\n", epoch, maplen);
2036 newmap = osdmap_decode(&p, p+maplen);
2037 if (IS_ERR(newmap)) {
2038 err = PTR_ERR(newmap);
2039 goto bad;
2040 }
2041 BUG_ON(!newmap);
2042 oldmap = osdc->osdmap;
2043 osdc->osdmap = newmap;
2044 if (oldmap) {
2045 if (oldmap->epoch + 1 < newmap->epoch)
2046 skipped_map = 1;
2047 ceph_osdmap_destroy(oldmap);
2048 }
2049 was_full = was_full ||
2050 ceph_osdmap_flag(osdc->osdmap,
2051 CEPH_OSDMAP_FULL);
2052 kick_requests(osdc, skipped_map, was_full);
2053 }
2054 p += maplen;
2055 nr_maps--;
2056 }
2057
2058 if (!osdc->osdmap)
2059 goto bad;
2060 done:
2061 downgrade_write(&osdc->map_sem);
2062 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
2063
2064 /*
2065 * subscribe to subsequent osdmap updates if full to ensure
2066 * we find out when we are no longer full and stop returning
2067 * ENOSPC.
2068 */
2069 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2070 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2071 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
2072 ceph_monc_request_next_osdmap(&osdc->client->monc);
2073
2074 mutex_lock(&osdc->request_mutex);
2075 __send_queued(osdc);
2076 mutex_unlock(&osdc->request_mutex);
2077 up_read(&osdc->map_sem);
2078 wake_up_all(&osdc->client->auth_wq);
2079 return;
2080
2081 bad:
2082 pr_err("osdc handle_map corrupt msg\n");
2083 ceph_msg_dump(msg);
2084 up_write(&osdc->map_sem);
2085 return;
2086 }
2087
2088 /*
2089 * watch/notify callback event infrastructure
2090 *
2091 * These callbacks are used both for watch and notify operations.
2092 */
2093 static void __release_event(struct kref *kref)
2094 {
2095 struct ceph_osd_event *event =
2096 container_of(kref, struct ceph_osd_event, kref);
2097
2098 dout("__release_event %p\n", event);
2099 kfree(event);
2100 }
2101
2102 static void get_event(struct ceph_osd_event *event)
2103 {
2104 kref_get(&event->kref);
2105 }
2106
2107 void ceph_osdc_put_event(struct ceph_osd_event *event)
2108 {
2109 kref_put(&event->kref, __release_event);
2110 }
2111 EXPORT_SYMBOL(ceph_osdc_put_event);
2112
2113 static void __insert_event(struct ceph_osd_client *osdc,
2114 struct ceph_osd_event *new)
2115 {
2116 struct rb_node **p = &osdc->event_tree.rb_node;
2117 struct rb_node *parent = NULL;
2118 struct ceph_osd_event *event = NULL;
2119
2120 while (*p) {
2121 parent = *p;
2122 event = rb_entry(parent, struct ceph_osd_event, node);
2123 if (new->cookie < event->cookie)
2124 p = &(*p)->rb_left;
2125 else if (new->cookie > event->cookie)
2126 p = &(*p)->rb_right;
2127 else
2128 BUG();
2129 }
2130
2131 rb_link_node(&new->node, parent, p);
2132 rb_insert_color(&new->node, &osdc->event_tree);
2133 }
2134
2135 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2136 u64 cookie)
2137 {
2138 struct rb_node **p = &osdc->event_tree.rb_node;
2139 struct rb_node *parent = NULL;
2140 struct ceph_osd_event *event = NULL;
2141
2142 while (*p) {
2143 parent = *p;
2144 event = rb_entry(parent, struct ceph_osd_event, node);
2145 if (cookie < event->cookie)
2146 p = &(*p)->rb_left;
2147 else if (cookie > event->cookie)
2148 p = &(*p)->rb_right;
2149 else
2150 return event;
2151 }
2152 return NULL;
2153 }
2154
2155 static void __remove_event(struct ceph_osd_event *event)
2156 {
2157 struct ceph_osd_client *osdc = event->osdc;
2158
2159 if (!RB_EMPTY_NODE(&event->node)) {
2160 dout("__remove_event removed %p\n", event);
2161 rb_erase(&event->node, &osdc->event_tree);
2162 ceph_osdc_put_event(event);
2163 } else {
2164 dout("__remove_event didn't remove %p\n", event);
2165 }
2166 }
2167
2168 int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2169 void (*event_cb)(u64, u64, u8, void *),
2170 void *data, struct ceph_osd_event **pevent)
2171 {
2172 struct ceph_osd_event *event;
2173
2174 event = kmalloc(sizeof(*event), GFP_NOIO);
2175 if (!event)
2176 return -ENOMEM;
2177
2178 dout("create_event %p\n", event);
2179 event->cb = event_cb;
2180 event->one_shot = 0;
2181 event->data = data;
2182 event->osdc = osdc;
2183 INIT_LIST_HEAD(&event->osd_node);
2184 RB_CLEAR_NODE(&event->node);
2185 kref_init(&event->kref); /* one ref for us */
2186 kref_get(&event->kref); /* one ref for the caller */
2187
2188 spin_lock(&osdc->event_lock);
2189 event->cookie = ++osdc->event_count;
2190 __insert_event(osdc, event);
2191 spin_unlock(&osdc->event_lock);
2192
2193 *pevent = event;
2194 return 0;
2195 }
2196 EXPORT_SYMBOL(ceph_osdc_create_event);
2197
2198 void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2199 {
2200 struct ceph_osd_client *osdc = event->osdc;
2201
2202 dout("cancel_event %p\n", event);
2203 spin_lock(&osdc->event_lock);
2204 __remove_event(event);
2205 spin_unlock(&osdc->event_lock);
2206 ceph_osdc_put_event(event); /* caller's */
2207 }
2208 EXPORT_SYMBOL(ceph_osdc_cancel_event);
2209
2210
2211 static void do_event_work(struct work_struct *work)
2212 {
2213 struct ceph_osd_event_work *event_work =
2214 container_of(work, struct ceph_osd_event_work, work);
2215 struct ceph_osd_event *event = event_work->event;
2216 u64 ver = event_work->ver;
2217 u64 notify_id = event_work->notify_id;
2218 u8 opcode = event_work->opcode;
2219
2220 dout("do_event_work completing %p\n", event);
2221 event->cb(ver, notify_id, opcode, event->data);
2222 dout("do_event_work completed %p\n", event);
2223 ceph_osdc_put_event(event);
2224 kfree(event_work);
2225 }
2226
2227
2228 /*
2229 * Process osd watch notifications
2230 */
2231 static void handle_watch_notify(struct ceph_osd_client *osdc,
2232 struct ceph_msg *msg)
2233 {
2234 void *p, *end;
2235 u8 proto_ver;
2236 u64 cookie, ver, notify_id;
2237 u8 opcode;
2238 struct ceph_osd_event *event;
2239 struct ceph_osd_event_work *event_work;
2240
2241 p = msg->front.iov_base;
2242 end = p + msg->front.iov_len;
2243
2244 ceph_decode_8_safe(&p, end, proto_ver, bad);
2245 ceph_decode_8_safe(&p, end, opcode, bad);
2246 ceph_decode_64_safe(&p, end, cookie, bad);
2247 ceph_decode_64_safe(&p, end, ver, bad);
2248 ceph_decode_64_safe(&p, end, notify_id, bad);
2249
2250 spin_lock(&osdc->event_lock);
2251 event = __find_event(osdc, cookie);
2252 if (event) {
2253 BUG_ON(event->one_shot);
2254 get_event(event);
2255 }
2256 spin_unlock(&osdc->event_lock);
2257 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2258 cookie, ver, event);
2259 if (event) {
2260 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
2261 if (!event_work) {
2262 dout("ERROR: could not allocate event_work\n");
2263 goto done_err;
2264 }
2265 INIT_WORK(&event_work->work, do_event_work);
2266 event_work->event = event;
2267 event_work->ver = ver;
2268 event_work->notify_id = notify_id;
2269 event_work->opcode = opcode;
2270 if (!queue_work(osdc->notify_wq, &event_work->work)) {
2271 dout("WARNING: failed to queue notify event work\n");
2272 goto done_err;
2273 }
2274 }
2275
2276 return;
2277
2278 done_err:
2279 ceph_osdc_put_event(event);
2280 return;
2281
2282 bad:
2283 pr_err("osdc handle_watch_notify corrupt msg\n");
2284 return;
2285 }
2286
2287 /*
2288 * build new request AND message
2289 *
2290 */
2291 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2292 struct ceph_snap_context *snapc, u64 snap_id,
2293 struct timespec *mtime)
2294 {
2295 struct ceph_msg *msg = req->r_request;
2296 void *p;
2297 size_t msg_size;
2298 int flags = req->r_flags;
2299 u64 data_len;
2300 unsigned int i;
2301
2302 req->r_snapid = snap_id;
2303 req->r_snapc = ceph_get_snap_context(snapc);
2304
2305 /* encode request */
2306 msg->hdr.version = cpu_to_le16(4);
2307
2308 p = msg->front.iov_base;
2309 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2310 req->r_request_osdmap_epoch = p;
2311 p += 4;
2312 req->r_request_flags = p;
2313 p += 4;
2314 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2315 ceph_encode_timespec(p, mtime);
2316 p += sizeof(struct ceph_timespec);
2317 req->r_request_reassert_version = p;
2318 p += sizeof(struct ceph_eversion); /* will get filled in */
2319
2320 /* oloc */
2321 ceph_encode_8(&p, 4);
2322 ceph_encode_8(&p, 4);
2323 ceph_encode_32(&p, 8 + 4 + 4);
2324 req->r_request_pool = p;
2325 p += 8;
2326 ceph_encode_32(&p, -1); /* preferred */
2327 ceph_encode_32(&p, 0); /* key len */
2328
2329 ceph_encode_8(&p, 1);
2330 req->r_request_pgid = p;
2331 p += 8 + 4;
2332 ceph_encode_32(&p, -1); /* preferred */
2333
2334 /* oid */
2335 ceph_encode_32(&p, req->r_base_oid.name_len);
2336 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2337 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2338 req->r_base_oid.name, req->r_base_oid.name_len);
2339 p += req->r_base_oid.name_len;
2340
2341 /* ops--can imply data */
2342 ceph_encode_16(&p, (u16)req->r_num_ops);
2343 data_len = 0;
2344 for (i = 0; i < req->r_num_ops; i++) {
2345 data_len += osd_req_encode_op(req, p, i);
2346 p += sizeof(struct ceph_osd_op);
2347 }
2348
2349 /* snaps */
2350 ceph_encode_64(&p, req->r_snapid);
2351 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2352 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2353 if (req->r_snapc) {
2354 for (i = 0; i < snapc->num_snaps; i++) {
2355 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2356 }
2357 }
2358
2359 req->r_request_attempts = p;
2360 p += 4;
2361
2362 /* data */
2363 if (flags & CEPH_OSD_FLAG_WRITE) {
2364 u16 data_off;
2365
2366 /*
2367 * The header "data_off" is a hint to the receiver
2368 * allowing it to align received data into its
2369 * buffers such that there's no need to re-copy
2370 * it before writing it to disk (direct I/O).
2371 */
2372 data_off = (u16) (off & 0xffff);
2373 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2374 }
2375 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2376
2377 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2378 msg_size = p - msg->front.iov_base;
2379 msg->front.iov_len = msg_size;
2380 msg->hdr.front_len = cpu_to_le32(msg_size);
2381
2382 dout("build_request msg_size was %d\n", (int)msg_size);
2383 }
2384 EXPORT_SYMBOL(ceph_osdc_build_request);
2385
2386 /*
2387 * Register request, send initial attempt.
2388 */
2389 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2390 struct ceph_osd_request *req,
2391 bool nofail)
2392 {
2393 int rc;
2394
2395 down_read(&osdc->map_sem);
2396 mutex_lock(&osdc->request_mutex);
2397
2398 rc = __ceph_osdc_start_request(osdc, req, nofail);
2399
2400 mutex_unlock(&osdc->request_mutex);
2401 up_read(&osdc->map_sem);
2402
2403 return rc;
2404 }
2405 EXPORT_SYMBOL(ceph_osdc_start_request);
2406
2407 /*
2408 * wait for a request to complete
2409 */
2410 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2411 struct ceph_osd_request *req)
2412 {
2413 int rc;
2414
2415 rc = wait_for_completion_interruptible(&req->r_completion);
2416 if (rc < 0) {
2417 mutex_lock(&osdc->request_mutex);
2418 __cancel_request(req);
2419 __unregister_request(osdc, req);
2420 mutex_unlock(&osdc->request_mutex);
2421 complete_request(req);
2422 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
2423 return rc;
2424 }
2425
2426 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2427 return req->r_result;
2428 }
2429 EXPORT_SYMBOL(ceph_osdc_wait_request);
2430
2431 /*
2432 * sync - wait for all in-flight requests to flush. avoid starvation.
2433 */
2434 void ceph_osdc_sync(struct ceph_osd_client *osdc)
2435 {
2436 struct ceph_osd_request *req;
2437 u64 last_tid, next_tid = 0;
2438
2439 mutex_lock(&osdc->request_mutex);
2440 last_tid = osdc->last_tid;
2441 while (1) {
2442 req = __lookup_request_ge(osdc, next_tid);
2443 if (!req)
2444 break;
2445 if (req->r_tid > last_tid)
2446 break;
2447
2448 next_tid = req->r_tid + 1;
2449 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2450 continue;
2451
2452 ceph_osdc_get_request(req);
2453 mutex_unlock(&osdc->request_mutex);
2454 dout("sync waiting on tid %llu (last is %llu)\n",
2455 req->r_tid, last_tid);
2456 wait_for_completion(&req->r_safe_completion);
2457 mutex_lock(&osdc->request_mutex);
2458 ceph_osdc_put_request(req);
2459 }
2460 mutex_unlock(&osdc->request_mutex);
2461 dout("sync done (thru tid %llu)\n", last_tid);
2462 }
2463 EXPORT_SYMBOL(ceph_osdc_sync);
2464
2465 /*
2466 * Call all pending notify callbacks - for use after a watch is
2467 * unregistered, to make sure no more callbacks for it will be invoked
2468 */
2469 extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2470 {
2471 flush_workqueue(osdc->notify_wq);
2472 }
2473 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2474
2475
2476 /*
2477 * init, shutdown
2478 */
2479 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2480 {
2481 int err;
2482
2483 dout("init\n");
2484 osdc->client = client;
2485 osdc->osdmap = NULL;
2486 init_rwsem(&osdc->map_sem);
2487 init_completion(&osdc->map_waiters);
2488 osdc->last_requested_map = 0;
2489 mutex_init(&osdc->request_mutex);
2490 osdc->last_tid = 0;
2491 osdc->osds = RB_ROOT;
2492 INIT_LIST_HEAD(&osdc->osd_lru);
2493 osdc->requests = RB_ROOT;
2494 INIT_LIST_HEAD(&osdc->req_lru);
2495 INIT_LIST_HEAD(&osdc->req_unsent);
2496 INIT_LIST_HEAD(&osdc->req_notarget);
2497 INIT_LIST_HEAD(&osdc->req_linger);
2498 osdc->num_requests = 0;
2499 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2500 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2501 spin_lock_init(&osdc->event_lock);
2502 osdc->event_tree = RB_ROOT;
2503 osdc->event_count = 0;
2504
2505 schedule_delayed_work(&osdc->osds_timeout_work,
2506 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
2507
2508 err = -ENOMEM;
2509 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2510 sizeof(struct ceph_osd_request));
2511 if (!osdc->req_mempool)
2512 goto out;
2513
2514 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2515 OSD_OP_FRONT_LEN, 10, true,
2516 "osd_op");
2517 if (err < 0)
2518 goto out_mempool;
2519 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2520 OSD_OPREPLY_FRONT_LEN, 10, true,
2521 "osd_op_reply");
2522 if (err < 0)
2523 goto out_msgpool;
2524
2525 err = -ENOMEM;
2526 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2527 if (!osdc->notify_wq)
2528 goto out_msgpool_reply;
2529
2530 return 0;
2531
2532 out_msgpool_reply:
2533 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2534 out_msgpool:
2535 ceph_msgpool_destroy(&osdc->msgpool_op);
2536 out_mempool:
2537 mempool_destroy(osdc->req_mempool);
2538 out:
2539 return err;
2540 }
2541
2542 void ceph_osdc_stop(struct ceph_osd_client *osdc)
2543 {
2544 flush_workqueue(osdc->notify_wq);
2545 destroy_workqueue(osdc->notify_wq);
2546 cancel_delayed_work_sync(&osdc->timeout_work);
2547 cancel_delayed_work_sync(&osdc->osds_timeout_work);
2548 if (osdc->osdmap) {
2549 ceph_osdmap_destroy(osdc->osdmap);
2550 osdc->osdmap = NULL;
2551 }
2552 remove_all_osds(osdc);
2553 mempool_destroy(osdc->req_mempool);
2554 ceph_msgpool_destroy(&osdc->msgpool_op);
2555 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2556 }
2557
2558 /*
2559 * Read some contiguous pages. If we cross a stripe boundary, shorten
2560 * *plen. Return number of bytes read, or error.
2561 */
2562 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2563 struct ceph_vino vino, struct ceph_file_layout *layout,
2564 u64 off, u64 *plen,
2565 u32 truncate_seq, u64 truncate_size,
2566 struct page **pages, int num_pages, int page_align)
2567 {
2568 struct ceph_osd_request *req;
2569 int rc = 0;
2570
2571 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2572 vino.snap, off, *plen);
2573 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
2574 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2575 NULL, truncate_seq, truncate_size,
2576 false);
2577 if (IS_ERR(req))
2578 return PTR_ERR(req);
2579
2580 /* it may be a short read due to an object boundary */
2581
2582 osd_req_op_extent_osd_data_pages(req, 0,
2583 pages, *plen, page_align, false, false);
2584
2585 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
2586 off, *plen, *plen, page_align);
2587
2588 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2589
2590 rc = ceph_osdc_start_request(osdc, req, false);
2591 if (!rc)
2592 rc = ceph_osdc_wait_request(osdc, req);
2593
2594 ceph_osdc_put_request(req);
2595 dout("readpages result %d\n", rc);
2596 return rc;
2597 }
2598 EXPORT_SYMBOL(ceph_osdc_readpages);
2599
2600 /*
2601 * do a synchronous write on N pages
2602 */
2603 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2604 struct ceph_file_layout *layout,
2605 struct ceph_snap_context *snapc,
2606 u64 off, u64 len,
2607 u32 truncate_seq, u64 truncate_size,
2608 struct timespec *mtime,
2609 struct page **pages, int num_pages)
2610 {
2611 struct ceph_osd_request *req;
2612 int rc = 0;
2613 int page_align = off & ~PAGE_MASK;
2614
2615 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
2616 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
2617 CEPH_OSD_OP_WRITE,
2618 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2619 snapc, truncate_seq, truncate_size,
2620 true);
2621 if (IS_ERR(req))
2622 return PTR_ERR(req);
2623
2624 /* it may be a short write due to an object boundary */
2625 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2626 false, false);
2627 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
2628
2629 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2630
2631 rc = ceph_osdc_start_request(osdc, req, true);
2632 if (!rc)
2633 rc = ceph_osdc_wait_request(osdc, req);
2634
2635 ceph_osdc_put_request(req);
2636 if (rc == 0)
2637 rc = len;
2638 dout("writepages result %d\n", rc);
2639 return rc;
2640 }
2641 EXPORT_SYMBOL(ceph_osdc_writepages);
2642
2643 int ceph_osdc_setup(void)
2644 {
2645 BUG_ON(ceph_osd_request_cache);
2646 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2647 sizeof (struct ceph_osd_request),
2648 __alignof__(struct ceph_osd_request),
2649 0, NULL);
2650
2651 return ceph_osd_request_cache ? 0 : -ENOMEM;
2652 }
2653 EXPORT_SYMBOL(ceph_osdc_setup);
2654
2655 void ceph_osdc_cleanup(void)
2656 {
2657 BUG_ON(!ceph_osd_request_cache);
2658 kmem_cache_destroy(ceph_osd_request_cache);
2659 ceph_osd_request_cache = NULL;
2660 }
2661 EXPORT_SYMBOL(ceph_osdc_cleanup);
2662
2663 /*
2664 * handle incoming message
2665 */
2666 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2667 {
2668 struct ceph_osd *osd = con->private;
2669 struct ceph_osd_client *osdc;
2670 int type = le16_to_cpu(msg->hdr.type);
2671
2672 if (!osd)
2673 goto out;
2674 osdc = osd->o_osdc;
2675
2676 switch (type) {
2677 case CEPH_MSG_OSD_MAP:
2678 ceph_osdc_handle_map(osdc, msg);
2679 break;
2680 case CEPH_MSG_OSD_OPREPLY:
2681 handle_reply(osdc, msg, con);
2682 break;
2683 case CEPH_MSG_WATCH_NOTIFY:
2684 handle_watch_notify(osdc, msg);
2685 break;
2686
2687 default:
2688 pr_err("received unknown message type %d %s\n", type,
2689 ceph_msg_type_name(type));
2690 }
2691 out:
2692 ceph_msg_put(msg);
2693 }
2694
2695 /*
2696 * lookup and return message for incoming reply. set up reply message
2697 * pages.
2698 */
2699 static struct ceph_msg *get_reply(struct ceph_connection *con,
2700 struct ceph_msg_header *hdr,
2701 int *skip)
2702 {
2703 struct ceph_osd *osd = con->private;
2704 struct ceph_osd_client *osdc = osd->o_osdc;
2705 struct ceph_msg *m;
2706 struct ceph_osd_request *req;
2707 int front_len = le32_to_cpu(hdr->front_len);
2708 int data_len = le32_to_cpu(hdr->data_len);
2709 u64 tid;
2710
2711 tid = le64_to_cpu(hdr->tid);
2712 mutex_lock(&osdc->request_mutex);
2713 req = __lookup_request(osdc, tid);
2714 if (!req) {
2715 *skip = 1;
2716 m = NULL;
2717 dout("get_reply unknown tid %llu from osd%d\n", tid,
2718 osd->o_osd);
2719 goto out;
2720 }
2721
2722 if (req->r_reply->con)
2723 dout("%s revoking msg %p from old con %p\n", __func__,
2724 req->r_reply, req->r_reply->con);
2725 ceph_msg_revoke_incoming(req->r_reply);
2726
2727 if (front_len > req->r_reply->front_alloc_len) {
2728 pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
2729 front_len, req->r_reply->front_alloc_len,
2730 (unsigned int)con->peer_name.type,
2731 le64_to_cpu(con->peer_name.num));
2732 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2733 false);
2734 if (!m)
2735 goto out;
2736 ceph_msg_put(req->r_reply);
2737 req->r_reply = m;
2738 }
2739 m = ceph_msg_get(req->r_reply);
2740
2741 if (data_len > 0) {
2742 struct ceph_osd_data *osd_data;
2743
2744 /*
2745 * XXX This is assuming there is only one op containing
2746 * XXX page data. Probably OK for reads, but this
2747 * XXX ought to be done more generally.
2748 */
2749 osd_data = osd_req_op_extent_osd_data(req, 0);
2750 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
2751 if (osd_data->pages &&
2752 unlikely(osd_data->length < data_len)) {
2753
2754 pr_warning("tid %lld reply has %d bytes "
2755 "we had only %llu bytes ready\n",
2756 tid, data_len, osd_data->length);
2757 *skip = 1;
2758 ceph_msg_put(m);
2759 m = NULL;
2760 goto out;
2761 }
2762 }
2763 }
2764 *skip = 0;
2765 dout("get_reply tid %lld %p\n", tid, m);
2766
2767 out:
2768 mutex_unlock(&osdc->request_mutex);
2769 return m;
2770
2771 }
2772
2773 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2774 struct ceph_msg_header *hdr,
2775 int *skip)
2776 {
2777 struct ceph_osd *osd = con->private;
2778 int type = le16_to_cpu(hdr->type);
2779 int front = le32_to_cpu(hdr->front_len);
2780
2781 *skip = 0;
2782 switch (type) {
2783 case CEPH_MSG_OSD_MAP:
2784 case CEPH_MSG_WATCH_NOTIFY:
2785 return ceph_msg_new(type, front, GFP_NOFS, false);
2786 case CEPH_MSG_OSD_OPREPLY:
2787 return get_reply(con, hdr, skip);
2788 default:
2789 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2790 osd->o_osd);
2791 *skip = 1;
2792 return NULL;
2793 }
2794 }
2795
2796 /*
2797 * Wrappers to refcount containing ceph_osd struct
2798 */
2799 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2800 {
2801 struct ceph_osd *osd = con->private;
2802 if (get_osd(osd))
2803 return con;
2804 return NULL;
2805 }
2806
2807 static void put_osd_con(struct ceph_connection *con)
2808 {
2809 struct ceph_osd *osd = con->private;
2810 put_osd(osd);
2811 }
2812
2813 /*
2814 * authentication
2815 */
2816 /*
2817 * Note: returned pointer is the address of a structure that's
2818 * managed separately. Caller must *not* attempt to free it.
2819 */
2820 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
2821 int *proto, int force_new)
2822 {
2823 struct ceph_osd *o = con->private;
2824 struct ceph_osd_client *osdc = o->o_osdc;
2825 struct ceph_auth_client *ac = osdc->client->monc.auth;
2826 struct ceph_auth_handshake *auth = &o->o_auth;
2827
2828 if (force_new && auth->authorizer) {
2829 ceph_auth_destroy_authorizer(ac, auth->authorizer);
2830 auth->authorizer = NULL;
2831 }
2832 if (!auth->authorizer) {
2833 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2834 auth);
2835 if (ret)
2836 return ERR_PTR(ret);
2837 } else {
2838 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2839 auth);
2840 if (ret)
2841 return ERR_PTR(ret);
2842 }
2843 *proto = ac->protocol;
2844
2845 return auth;
2846 }
2847
2848
2849 static int verify_authorizer_reply(struct ceph_connection *con, int len)
2850 {
2851 struct ceph_osd *o = con->private;
2852 struct ceph_osd_client *osdc = o->o_osdc;
2853 struct ceph_auth_client *ac = osdc->client->monc.auth;
2854
2855 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2856 }
2857
2858 static int invalidate_authorizer(struct ceph_connection *con)
2859 {
2860 struct ceph_osd *o = con->private;
2861 struct ceph_osd_client *osdc = o->o_osdc;
2862 struct ceph_auth_client *ac = osdc->client->monc.auth;
2863
2864 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2865 return ceph_monc_validate_auth(&osdc->client->monc);
2866 }
2867
2868 static const struct ceph_connection_operations osd_con_ops = {
2869 .get = get_osd_con,
2870 .put = put_osd_con,
2871 .dispatch = dispatch,
2872 .get_authorizer = get_authorizer,
2873 .verify_authorizer_reply = verify_authorizer_reply,
2874 .invalidate_authorizer = invalidate_authorizer,
2875 .alloc_msg = alloc_msg,
2876 .fault = osd_reset,
2877 };
Linux with added FPC-III support