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libceph: fix safe completion
[linux-2.6-block.git] / net / ceph / osd_client.c
CommitLineData
a4ce40a9 1
3d14c5d2 2#include <linux/ceph/ceph_debug.h>
f24e9980 3
3d14c5d2 4#include <linux/module.h>
f24e9980
SW		 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>
68b4476b
YS		 11#ifdef CONFIG_BLOCK
12#include <linux/bio.h>
13#endif
f24e9980 14
3d14c5d2
YS		 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>
f24e9980 21
c16e7869
SW		 22#define OSD_OP_FRONT_LEN 4096
23#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 24
5522ae0b
AE		 25static struct kmem_cache *ceph_osd_request_cache;
26
9e32789f 27static const struct ceph_connection_operations osd_con_ops;
f24e9980 28
f9d25199 29static void __send_queued(struct ceph_osd_client *osdc);
6f6c7006 30static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
a40c4f10
YS		 31static void __register_request(struct ceph_osd_client *osdc,
32 struct ceph_osd_request *req);
33static void __unregister_linger_request(struct ceph_osd_client *osdc,
34 struct ceph_osd_request *req);
56e925b6
SW		 35static void __send_request(struct ceph_osd_client *osdc,
36 struct ceph_osd_request *req);
f24e9980
SW		 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 */
dbe0fc41 63static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 64 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 65{
60e56f13 66 u64 orig_len = *plen;
d63b77f4 67 int r;
f24e9980 68
60e56f13 69 /* object extent? */
75d1c941
AE		 70 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
71 objoff, objlen);
d63b77f4
SW		 72 if (r < 0)
73 return r;
75d1c941
AE		 74 if (*objlen < orig_len) {
75 *plen = *objlen;
60e56f13
AE		 76 dout(" skipping last %llu, final file extent %llu~%llu\n",
77 orig_len - *plen, off, *plen);
78 }
79
75d1c941 80 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
f24e9980 81
3ff5f385 82 return 0;
f24e9980
SW		 83}
84
c54d47bf
AE		 85static 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
a4ce40a9 91static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 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}
43bfe5de 102
a4ce40a9 103static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 104 struct ceph_pagelist *pagelist)
105{
106 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
107 osd_data->pagelist = pagelist;
108}
43bfe5de
AE		 109
110#ifdef CONFIG_BLOCK
a4ce40a9 111static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 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}
43bfe5de
AE		 118#endif /* CONFIG_BLOCK */
119
863c7eb5
AE		 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
49719778
AE		 126static struct ceph_osd_data *
127osd_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
a4ce40a9
AE		 134struct ceph_osd_data *
135osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 136 unsigned int which)
a4ce40a9 137{
863c7eb5 138 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 139}
140EXPORT_SYMBOL(osd_req_op_extent_osd_data);
141
a4ce40a9
AE		 142struct ceph_osd_data *
143osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
144 unsigned int which)
145{
863c7eb5 146 return osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 147}
148EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
149
49719778
AE		 150void 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}
161EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
162
a4ce40a9 163void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 164 unsigned int which, struct page **pages,
165 u64 length, u32 alignment,
a4ce40a9
AE		 166 bool pages_from_pool, bool own_pages)
167{
168 struct ceph_osd_data *osd_data;
169
863c7eb5 170 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 171 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
172 pages_from_pool, own_pages);
a4ce40a9
AE		 173}
174EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
175
176void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 177 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 178{
179 struct ceph_osd_data *osd_data;
180
863c7eb5 181 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 182 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 183}
184EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
185
186#ifdef CONFIG_BLOCK
187void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 188 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 189{
190 struct ceph_osd_data *osd_data;
863c7eb5
AE		 191
192 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 193 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 194}
195EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
196#endif /* CONFIG_BLOCK */
197
198static 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
863c7eb5 204 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 205 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 206}
207
04017e29
AE		 208void 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
863c7eb5 214 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29
AE		 215 ceph_osd_data_pagelist_init(osd_data, pagelist);
216}
217EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
218
6c57b554
AE		 219void 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}
229EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
230
a4ce40a9
AE		 231void 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
863c7eb5 237 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 238 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
239 pages_from_pool, own_pages);
a4ce40a9
AE		 240}
241EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
242
23c08a9c
AE		 243static 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
c54d47bf
AE		 262static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
263{
5476492f 264 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 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 }
5476492f
AE		 271 ceph_osd_data_init(osd_data);
272}
273
274static 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);
04017e29 289 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 290 ceph_osd_data_release(&op->cls.response_data);
291 break;
292 default:
293 break;
294 }
c54d47bf
AE		 295}
296
f24e9980
SW		 297/*
298 * requests
299 */
415e49a9 300void ceph_osdc_release_request(struct kref *kref)
f24e9980 301{
c54d47bf 302 struct ceph_osd_request *req;
5476492f 303 unsigned int which;
415e49a9 304
c54d47bf 305 req = container_of(kref, struct ceph_osd_request, r_kref);
415e49a9
SW		 306 if (req->r_request)
307 ceph_msg_put(req->r_request);
ace6d3a9 308 if (req->r_reply) {
8921d114 309 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 310 ceph_msg_put(req->r_reply);
ace6d3a9 311 }
0fff87ec 312
5476492f
AE		 313 for (which = 0; which < req->r_num_ops; which++)
314 osd_req_op_data_release(req, which);
0fff87ec 315
415e49a9
SW		 316 ceph_put_snap_context(req->r_snapc);
317 if (req->r_mempool)
318 mempool_free(req, req->r_osdc->req_mempool);
319 else
5522ae0b
AE		 320 kmem_cache_free(ceph_osd_request_cache, req);
321
f24e9980 322}
3d14c5d2 323EXPORT_SYMBOL(ceph_osdc_release_request);
68b4476b 324
3499e8a5 325struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 326 struct ceph_snap_context *snapc,
1b83bef2 327 unsigned int num_ops,
3499e8a5 328 bool use_mempool,
54a54007 329 gfp_t gfp_flags)
f24e9980
SW		 330{
331 struct ceph_osd_request *req;
332 struct ceph_msg *msg;
1b83bef2
SW		 333 size_t msg_size;
334
79528734
AE		 335 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
336 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
337
1b83bef2
SW		 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;
f24e9980
SW		 347
348 if (use_mempool) {
3499e8a5 349 req = mempool_alloc(osdc->req_mempool, gfp_flags);
f24e9980
SW		 350 memset(req, 0, sizeof(*req));
351 } else {
5522ae0b 352 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
f24e9980
SW		 353 }
354 if (req == NULL)
a79832f2 355 return NULL;
f24e9980 356
f24e9980
SW		 357 req->r_osdc = osdc;
358 req->r_mempool = use_mempool;
79528734 359 req->r_num_ops = num_ops;
68b4476b 360
415e49a9 361 kref_init(&req->r_kref);
f24e9980
SW		 362 init_completion(&req->r_completion);
363 init_completion(&req->r_safe_completion);
a978fa20 364 RB_CLEAR_NODE(&req->r_node);
f24e9980 365 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10
YS		 366 INIT_LIST_HEAD(&req->r_linger_item);
367 INIT_LIST_HEAD(&req->r_linger_osd);
935b639a 368 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 369 INIT_LIST_HEAD(&req->r_osd_item);
370
c16e7869
SW		 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,
b61c2763 376 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
a79832f2 377 if (!msg) {
c16e7869 378 ceph_osdc_put_request(req);
a79832f2 379 return NULL;
c16e7869
SW		 380 }
381 req->r_reply = msg;
382
383 /* create request message; allow space for oid */
f24e9980 384 if (use_mempool)
8f3bc053 385 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 386 else
b61c2763 387 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
a79832f2 388 if (!msg) {
f24e9980 389 ceph_osdc_put_request(req);
a79832f2 390 return NULL;
f24e9980 391 }
68b4476b 392
f24e9980 393 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5
YS		 394
395 req->r_request = msg;
3499e8a5
YS		 396
397 return req;
398}
3d14c5d2 399EXPORT_SYMBOL(ceph_osdc_alloc_request);
3499e8a5 400
a8dd0a37 401static bool osd_req_opcode_valid(u16 opcode)
68b4476b 402{
a8dd0a37 403 switch (opcode) {
68b4476b 404 case CEPH_OSD_OP_READ:
a8dd0a37 405 case CEPH_OSD_OP_STAT:
4c46459c
AE		 406 case CEPH_OSD_OP_MAPEXT:
407 case CEPH_OSD_OP_MASKTRUNC:
408 case CEPH_OSD_OP_SPARSE_READ:
a9f36c3e 409 case CEPH_OSD_OP_NOTIFY:
a8dd0a37 410 case CEPH_OSD_OP_NOTIFY_ACK:
4c46459c 411 case CEPH_OSD_OP_ASSERT_VER:
a8dd0a37 412 case CEPH_OSD_OP_WRITE:
4c46459c
AE		 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:
a8dd0a37 418 case CEPH_OSD_OP_STARTSYNC:
4c46459c
AE		 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:
a9f36c3e 425 case CEPH_OSD_OP_ROLLBACK:
a8dd0a37 426 case CEPH_OSD_OP_WATCH:
4c46459c
AE		 427 case CEPH_OSD_OP_OMAPGETKEYS:
428 case CEPH_OSD_OP_OMAPGETVALS:
429 case CEPH_OSD_OP_OMAPGETHEADER:
430 case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
4c46459c
AE		 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:
a9f36c3e 439 case CEPH_OSD_OP_GETXATTR:
4c46459c 440 case CEPH_OSD_OP_GETXATTRS:
a9f36c3e
AE		 441 case CEPH_OSD_OP_CMPXATTR:
442 case CEPH_OSD_OP_SETXATTR:
4c46459c
AE		 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:
a8dd0a37 461 case CEPH_OSD_OP_CALL:
4c46459c
AE		 462 case CEPH_OSD_OP_PGLS:
463 case CEPH_OSD_OP_PGLS_FILTER:
a8dd0a37
AE		 464 return true;
465 default:
466 return false;
467 }
468}
469
33803f33
AE		 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 */
c99d2d4a 475static struct ceph_osd_req_op *
49719778 476_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
c99d2d4a 477 u16 opcode)
33803f33 478{
c99d2d4a
AE		 479 struct ceph_osd_req_op *op;
480
481 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 482 BUG_ON(!osd_req_opcode_valid(opcode));
483
c99d2d4a 484 op = &osd_req->r_ops[which];
33803f33 485 memset(op, 0, sizeof (*op));
33803f33 486 op->op = opcode;
c99d2d4a
AE		 487
488 return op;
33803f33
AE		 489}
490
49719778
AE		 491void 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}
496EXPORT_SYMBOL(osd_req_op_init);
497
c99d2d4a
AE		 498void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
499 unsigned int which, u16 opcode,
33803f33
AE		 500 u64 offset, u64 length,
501 u64 truncate_size, u32 truncate_seq)
502{
49719778 503 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33
AE		 504 size_t payload_len = 0;
505
506 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
507
33803f33
AE		 508 op->extent.offset = offset;
509 op->extent.length = length;
510 op->extent.truncate_size = truncate_size;
511 op->extent.truncate_seq = truncate_seq;
512 if (opcode == CEPH_OSD_OP_WRITE)
513 payload_len += length;
514
515 op->payload_len = payload_len;
516}
517EXPORT_SYMBOL(osd_req_op_extent_init);
518
c99d2d4a
AE		 519void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
520 unsigned int which, u64 length)
e5975c7c 521{
c99d2d4a
AE		 522 struct ceph_osd_req_op *op;
523 u64 previous;
524
525 BUG_ON(which >= osd_req->r_num_ops);
526 op = &osd_req->r_ops[which];
527 previous = op->extent.length;
e5975c7c
AE		 528
529 if (length == previous)
530 return; /* Nothing to do */
531 BUG_ON(length > previous);
532
533 op->extent.length = length;
534 op->payload_len -= previous - length;
535}
536EXPORT_SYMBOL(osd_req_op_extent_update);
537
c99d2d4a 538void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 539 u16 opcode, const char *class, const char *method)
33803f33 540{
49719778 541 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
5f562df5 542 struct ceph_pagelist *pagelist;
33803f33
AE		 543 size_t payload_len = 0;
544 size_t size;
545
546 BUG_ON(opcode != CEPH_OSD_OP_CALL);
547
5f562df5
AE		 548 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
549 BUG_ON(!pagelist);
550 ceph_pagelist_init(pagelist);
551
33803f33
AE		 552 op->cls.class_name = class;
553 size = strlen(class);
554 BUG_ON(size > (size_t) U8_MAX);
555 op->cls.class_len = size;
5f562df5 556 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 557 payload_len += size;
558
559 op->cls.method_name = method;
560 size = strlen(method);
561 BUG_ON(size > (size_t) U8_MAX);
562 op->cls.method_len = size;
5f562df5 563 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 564 payload_len += size;
565
a4ce40a9 566 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 567
33803f33
AE		 568 op->cls.argc = 0; /* currently unused */
569
570 op->payload_len = payload_len;
571}
572EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 573
c99d2d4a
AE		 574void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
575 unsigned int which, u16 opcode,
33803f33
AE		 576 u64 cookie, u64 version, int flag)
577{
49719778 578 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33 579
c99d2d4a 580 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 581
582 op->watch.cookie = cookie;
9ef1ee5a 583 op->watch.ver = version;
33803f33 584 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 585 op->watch.flag = (u8)1;
33803f33
AE		 586}
587EXPORT_SYMBOL(osd_req_op_watch_init);
588
90af3602 589static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 590 struct ceph_osd_data *osd_data)
591{
592 u64 length = ceph_osd_data_length(osd_data);
593
594 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
595 BUG_ON(length > (u64) SIZE_MAX);
596 if (length)
90af3602 597 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 598 length, osd_data->alignment);
599 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
600 BUG_ON(!length);
90af3602 601 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 602#ifdef CONFIG_BLOCK
603 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 604 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 605#endif
606 } else {
607 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
608 }
609}
610
a8dd0a37 611static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 612 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 613{
79528734 614 struct ceph_osd_req_op *src;
04017e29 615 struct ceph_osd_data *osd_data;
54d50649 616 u64 request_data_len = 0;
04017e29 617 u64 data_length;
a8dd0a37 618
79528734
AE		 619 BUG_ON(which >= req->r_num_ops);
620 src = &req->r_ops[which];
a8dd0a37
AE		 621 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
622 pr_err("unrecognized osd opcode %d\n", src->op);
623
624 return 0;
625 }
626
627 switch (src->op) {
628 case CEPH_OSD_OP_STAT:
49719778
AE		 629 osd_data = &src->raw_data_in;
630 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 631 break;
632 case CEPH_OSD_OP_READ:
633 case CEPH_OSD_OP_WRITE:
634 if (src->op == CEPH_OSD_OP_WRITE)
54d50649 635 request_data_len = src->extent.length;
a8dd0a37
AE		 636 dst->extent.offset = cpu_to_le64(src->extent.offset);
637 dst->extent.length = cpu_to_le64(src->extent.length);
638 dst->extent.truncate_size =
639 cpu_to_le64(src->extent.truncate_size);
640 dst->extent.truncate_seq =
641 cpu_to_le32(src->extent.truncate_seq);
04017e29 642 osd_data = &src->extent.osd_data;
5476492f 643 if (src->op == CEPH_OSD_OP_WRITE)
04017e29 644 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 645 else
04017e29 646 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 647 break;
648 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 649 dst->cls.class_len = src->cls.class_len;
650 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 651 osd_data = &src->cls.request_info;
652 ceph_osdc_msg_data_add(req->r_request, osd_data);
653 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
654 request_data_len = osd_data->pagelist->length;
655
656 osd_data = &src->cls.request_data;
657 data_length = ceph_osd_data_length(osd_data);
658 if (data_length) {
659 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
660 dst->cls.indata_len = cpu_to_le32(data_length);
661 ceph_osdc_msg_data_add(req->r_request, osd_data);
662 src->payload_len += data_length;
663 request_data_len += data_length;
664 }
665 osd_data = &src->cls.response_data;
666 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 667 break;
668 case CEPH_OSD_OP_STARTSYNC:
669 break;
670 case CEPH_OSD_OP_NOTIFY_ACK:
671 case CEPH_OSD_OP_WATCH:
672 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
673 dst->watch.ver = cpu_to_le64(src->watch.ver);
674 dst->watch.flag = src->watch.flag;
675 break;
676 default:
4c46459c 677 pr_err("unsupported osd opcode %s\n",
8f63ca2d 678 ceph_osd_op_name(src->op));
4c46459c 679 WARN_ON(1);
a8dd0a37
AE		 680
681 return 0;
68b4476b 682 }
a8dd0a37 683 dst->op = cpu_to_le16(src->op);
68b4476b 684 dst->payload_len = cpu_to_le32(src->payload_len);
175face2 685
54d50649 686 return request_data_len;
68b4476b
YS		 687}
688
3499e8a5
YS		 689/*
690 * build new request AND message, calculate layout, and adjust file
691 * extent as needed.
692 *
693 * if the file was recently truncated, we include information about its
694 * old and new size so that the object can be updated appropriately. (we
695 * avoid synchronously deleting truncated objects because it's slow.)
696 *
697 * if @do_sync, include a 'startsync' command so that the osd will flush
698 * data quickly.
699 */
700struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
701 struct ceph_file_layout *layout,
702 struct ceph_vino vino,
acead002 703 u64 off, u64 *plen, int num_ops,
3499e8a5
YS		 704 int opcode, int flags,
705 struct ceph_snap_context *snapc,
3499e8a5
YS		 706 u32 truncate_seq,
707 u64 truncate_size,
153e5167 708 bool use_mempool)
3499e8a5 709{
68b4476b 710 struct ceph_osd_request *req;
75d1c941
AE		 711 u64 objnum = 0;
712 u64 objoff = 0;
713 u64 objlen = 0;
d18d1e28
AE		 714 u32 object_size;
715 u64 object_base;
6816282d 716 int r;
68b4476b 717
d18d1e28 718 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
68b4476b 719
acead002 720 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 721 GFP_NOFS);
4ad12621 722 if (!req)
6816282d 723 return ERR_PTR(-ENOMEM);
79528734 724
d178a9e7 725 req->r_flags = flags;
3499e8a5
YS		 726
727 /* calculate max write size */
a19dadfb 728 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 729 if (r < 0) {
730 ceph_osdc_put_request(req);
6816282d 731 return ERR_PTR(r);
3ff5f385 732 }
a19dadfb 733
d18d1e28
AE		 734 object_size = le32_to_cpu(layout->fl_object_size);
735 object_base = off - objoff;
736 if (truncate_size <= object_base) {
737 truncate_size = 0;
738 } else {
739 truncate_size -= object_base;
740 if (truncate_size > object_size)
741 truncate_size = object_size;
a19dadfb 742 }
d18d1e28 743
c99d2d4a 744 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
b0270324 745 truncate_size, truncate_seq);
8c042b0d 746
acead002
AE		 747 /*
748 * A second op in the ops array means the caller wants to
749 * also issue a include a 'startsync' command so that the
750 * osd will flush data quickly.
751 */
752 if (num_ops > 1)
c99d2d4a 753 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
d18d1e28 754
3499e8a5
YS		 755 req->r_file_layout = *layout; /* keep a copy */
756
75d1c941
AE		 757 snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
758 vino.ino, objnum);
dbe0fc41
AE		 759 req->r_oid_len = strlen(req->r_oid);
760
f24e9980
SW		 761 return req;
762}
3d14c5d2 763EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 764
765/*
766 * We keep osd requests in an rbtree, sorted by ->r_tid.
767 */
768static void __insert_request(struct ceph_osd_client *osdc,
769 struct ceph_osd_request *new)
770{
771 struct rb_node **p = &osdc->requests.rb_node;
772 struct rb_node *parent = NULL;
773 struct ceph_osd_request *req = NULL;
774
775 while (*p) {
776 parent = *p;
777 req = rb_entry(parent, struct ceph_osd_request, r_node);
778 if (new->r_tid < req->r_tid)
779 p = &(*p)->rb_left;
780 else if (new->r_tid > req->r_tid)
781 p = &(*p)->rb_right;
782 else
783 BUG();
784 }
785
786 rb_link_node(&new->r_node, parent, p);
787 rb_insert_color(&new->r_node, &osdc->requests);
788}
789
790static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
791 u64 tid)
792{
793 struct ceph_osd_request *req;
794 struct rb_node *n = osdc->requests.rb_node;
795
796 while (n) {
797 req = rb_entry(n, struct ceph_osd_request, r_node);
798 if (tid < req->r_tid)
799 n = n->rb_left;
800 else if (tid > req->r_tid)
801 n = n->rb_right;
802 else
803 return req;
804 }
805 return NULL;
806}
807
808static struct ceph_osd_request *
809__lookup_request_ge(struct ceph_osd_client *osdc,
810 u64 tid)
811{
812 struct ceph_osd_request *req;
813 struct rb_node *n = osdc->requests.rb_node;
814
815 while (n) {
816 req = rb_entry(n, struct ceph_osd_request, r_node);
817 if (tid < req->r_tid) {
818 if (!n->rb_left)
819 return req;
820 n = n->rb_left;
821 } else if (tid > req->r_tid) {
822 n = n->rb_right;
823 } else {
824 return req;
825 }
826 }
827 return NULL;
828}
829
6f6c7006
SW		 830/*
831 * Resubmit requests pending on the given osd.
832 */
833static void __kick_osd_requests(struct ceph_osd_client *osdc,
834 struct ceph_osd *osd)
835{
a40c4f10 836 struct ceph_osd_request *req, *nreq;
e02493c0 837 LIST_HEAD(resend);
6f6c7006
SW		 838 int err;
839
840 dout("__kick_osd_requests osd%d\n", osd->o_osd);
841 err = __reset_osd(osdc, osd);
685a7555 842 if (err)
6f6c7006 843 return;
e02493c0
AE		 844 /*
845 * Build up a list of requests to resend by traversing the
846 * osd's list of requests. Requests for a given object are
847 * sent in tid order, and that is also the order they're
848 * kept on this list. Therefore all requests that are in
849 * flight will be found first, followed by all requests that
850 * have not yet been sent. And to resend requests while
851 * preserving this order we will want to put any sent
852 * requests back on the front of the osd client's unsent
853 * list.
854 *
855 * So we build a separate ordered list of already-sent
856 * requests for the affected osd and splice it onto the
857 * front of the osd client's unsent list. Once we've seen a
858 * request that has not yet been sent we're done. Those
859 * requests are already sitting right where they belong.
860 */
6f6c7006 861 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 862 if (!req->r_sent)
863 break;
864 list_move_tail(&req->r_req_lru_item, &resend);
865 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
6f6c7006 866 osd->o_osd);
a40c4f10
YS		 867 if (!req->r_linger)
868 req->r_flags |= CEPH_OSD_FLAG_RETRY;
869 }
e02493c0 870 list_splice(&resend, &osdc->req_unsent);
a40c4f10 871
e02493c0
AE		 872 /*
873 * Linger requests are re-registered before sending, which
874 * sets up a new tid for each. We add them to the unsent
875 * list at the end to keep things in tid order.
876 */
a40c4f10
YS		 877 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
878 r_linger_osd) {
77f38e0e
SW		 879 /*
880 * reregister request prior to unregistering linger so
881 * that r_osd is preserved.
882 */
883 BUG_ON(!list_empty(&req->r_req_lru_item));
a40c4f10 884 __register_request(osdc, req);
e02493c0 885 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
ad885927 886 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
77f38e0e 887 __unregister_linger_request(osdc, req);
a40c4f10
YS		 888 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
889 osd->o_osd);
6f6c7006
SW		 890 }
891}
892
f24e9980 893/*
81b024e7 894 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 895 */
896static void osd_reset(struct ceph_connection *con)
897{
898 struct ceph_osd *osd = con->private;
899 struct ceph_osd_client *osdc;
900
901 if (!osd)
902 return;
903 dout("osd_reset osd%d\n", osd->o_osd);
904 osdc = osd->o_osdc;
f24e9980 905 down_read(&osdc->map_sem);
83aff95e
SW		 906 mutex_lock(&osdc->request_mutex);
907 __kick_osd_requests(osdc, osd);
f9d25199 908 __send_queued(osdc);
83aff95e 909 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 910 up_read(&osdc->map_sem);
911}
912
913/*
914 * Track open sessions with osds.
915 */
e10006f8 916static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 917{
918 struct ceph_osd *osd;
919
920 osd = kzalloc(sizeof(*osd), GFP_NOFS);
921 if (!osd)
922 return NULL;
923
924 atomic_set(&osd->o_ref, 1);
925 osd->o_osdc = osdc;
e10006f8 926 osd->o_osd = onum;
f407731d 927 RB_CLEAR_NODE(&osd->o_node);
f24e9980 928 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 929 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 930 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 931 osd->o_incarnation = 1;
932
b7a9e5dd 933 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 934
422d2cb8 935 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 936 return osd;
937}
938
939static struct ceph_osd *get_osd(struct ceph_osd *osd)
940{
941 if (atomic_inc_not_zero(&osd->o_ref)) {
942 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
943 atomic_read(&osd->o_ref));
944 return osd;
945 } else {
946 dout("get_osd %p FAIL\n", osd);
947 return NULL;
948 }
949}
950
951static void put_osd(struct ceph_osd *osd)
952{
953 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
954 atomic_read(&osd->o_ref) - 1);
a255651d 955 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
79494d1b
SW		 956 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
957
27859f97 958 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 959 kfree(osd);
79494d1b 960 }
f24e9980
SW		 961}
962
963/*
964 * remove an osd from our map
965 */
f5a2041b 966static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 967{
f5a2041b 968 dout("__remove_osd %p\n", osd);
f24e9980
SW		 969 BUG_ON(!list_empty(&osd->o_requests));
970 rb_erase(&osd->o_node, &osdc->osds);
f5a2041b 971 list_del_init(&osd->o_osd_lru);
f24e9980
SW		 972 ceph_con_close(&osd->o_con);
973 put_osd(osd);
974}
975
aca420bc
SW		 976static void remove_all_osds(struct ceph_osd_client *osdc)
977{
048a9d2d 978 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 979 mutex_lock(&osdc->request_mutex);
980 while (!RB_EMPTY_ROOT(&osdc->osds)) {
981 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
982 struct ceph_osd, o_node);
983 __remove_osd(osdc, osd);
984 }
985 mutex_unlock(&osdc->request_mutex);
986}
987
f5a2041b
YS		 988static void __move_osd_to_lru(struct ceph_osd_client *osdc,
989 struct ceph_osd *osd)
990{
991 dout("__move_osd_to_lru %p\n", osd);
992 BUG_ON(!list_empty(&osd->o_osd_lru));
993 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
3d14c5d2 994 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
f5a2041b
YS		 995}
996
997static void __remove_osd_from_lru(struct ceph_osd *osd)
998{
999 dout("__remove_osd_from_lru %p\n", osd);
1000 if (!list_empty(&osd->o_osd_lru))
1001 list_del_init(&osd->o_osd_lru);
1002}
1003
aca420bc 1004static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1005{
1006 struct ceph_osd *osd, *nosd;
1007
1008 dout("__remove_old_osds %p\n", osdc);
1009 mutex_lock(&osdc->request_mutex);
1010 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1011 if (time_before(jiffies, osd->lru_ttl))
f5a2041b
YS		 1012 break;
1013 __remove_osd(osdc, osd);
1014 }
1015 mutex_unlock(&osdc->request_mutex);
1016}
1017
f24e9980
SW		 1018/*
1019 * reset osd connect
1020 */
f5a2041b 1021static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1022{
c3acb181 1023 struct ceph_entity_addr *peer_addr;
f24e9980 1024
f5a2041b 1025 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1026 if (list_empty(&osd->o_requests) &&
1027 list_empty(&osd->o_linger_requests)) {
f5a2041b 1028 __remove_osd(osdc, osd);
c3acb181
AE		 1029
1030 return -ENODEV;
1031 }
1032
1033 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1034 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1035 !ceph_con_opened(&osd->o_con)) {
1036 struct ceph_osd_request *req;
1037
87b315a5
SW		 1038 dout(" osd addr hasn't changed and connection never opened,"
1039 " letting msgr retry");
1040 /* touch each r_stamp for handle_timeout()'s benfit */
1041 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1042 req->r_stamp = jiffies;
c3acb181
AE		 1043
1044 return -EAGAIN;
f24e9980 1045 }
c3acb181
AE		 1046
1047 ceph_con_close(&osd->o_con);
1048 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1049 osd->o_incarnation++;
1050
1051 return 0;
f24e9980
SW		 1052}
1053
1054static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1055{
1056 struct rb_node **p = &osdc->osds.rb_node;
1057 struct rb_node *parent = NULL;
1058 struct ceph_osd *osd = NULL;
1059
aca420bc 1060 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1061 while (*p) {
1062 parent = *p;
1063 osd = rb_entry(parent, struct ceph_osd, o_node);
1064 if (new->o_osd < osd->o_osd)
1065 p = &(*p)->rb_left;
1066 else if (new->o_osd > osd->o_osd)
1067 p = &(*p)->rb_right;
1068 else
1069 BUG();
1070 }
1071
1072 rb_link_node(&new->o_node, parent, p);
1073 rb_insert_color(&new->o_node, &osdc->osds);
1074}
1075
1076static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1077{
1078 struct ceph_osd *osd;
1079 struct rb_node *n = osdc->osds.rb_node;
1080
1081 while (n) {
1082 osd = rb_entry(n, struct ceph_osd, o_node);
1083 if (o < osd->o_osd)
1084 n = n->rb_left;
1085 else if (o > osd->o_osd)
1086 n = n->rb_right;
1087 else
1088 return osd;
1089 }
1090 return NULL;
1091}
1092
422d2cb8
YS		 1093static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1094{
1095 schedule_delayed_work(&osdc->timeout_work,
3d14c5d2 1096 osdc->client->options->osd_keepalive_timeout * HZ);
422d2cb8
YS		 1097}
1098
1099static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1100{
1101 cancel_delayed_work(&osdc->timeout_work);
1102}
f24e9980
SW		 1103
1104/*
1105 * Register request, assign tid. If this is the first request, set up
1106 * the timeout event.
1107 */
a40c4f10
YS		 1108static void __register_request(struct ceph_osd_client *osdc,
1109 struct ceph_osd_request *req)
f24e9980 1110{
f24e9980 1111 req->r_tid = ++osdc->last_tid;
6df058c0 1112 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1113 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1114 __insert_request(osdc, req);
1115 ceph_osdc_get_request(req);
1116 osdc->num_requests++;
f24e9980 1117 if (osdc->num_requests == 1) {
422d2cb8
YS		 1118 dout(" first request, scheduling timeout\n");
1119 __schedule_osd_timeout(osdc);
f24e9980 1120 }
a40c4f10
YS		 1121}
1122
f24e9980
SW		 1123/*
1124 * called under osdc->request_mutex
1125 */
1126static void __unregister_request(struct ceph_osd_client *osdc,
1127 struct ceph_osd_request *req)
1128{
35f9f8a0
SW		 1129 if (RB_EMPTY_NODE(&req->r_node)) {
1130 dout("__unregister_request %p tid %lld not registered\n",
1131 req, req->r_tid);
1132 return;
1133 }
1134
f24e9980
SW		 1135 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1136 rb_erase(&req->r_node, &osdc->requests);
1137 osdc->num_requests--;
1138
0ba6478d
SW		 1139 if (req->r_osd) {
1140 /* make sure the original request isn't in flight. */
6740a845 1141 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1142
1143 list_del_init(&req->r_osd_item);
a40c4f10
YS		 1144 if (list_empty(&req->r_osd->o_requests) &&
1145 list_empty(&req->r_osd->o_linger_requests)) {
1146 dout("moving osd to %p lru\n", req->r_osd);
f5a2041b 1147 __move_osd_to_lru(osdc, req->r_osd);
a40c4f10 1148 }
fbdb9190 1149 if (list_empty(&req->r_linger_item))
a40c4f10 1150 req->r_osd = NULL;
0ba6478d 1151 }
f24e9980 1152
7d5f2481 1153 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1154 ceph_osdc_put_request(req);
1155
422d2cb8
YS		 1156 if (osdc->num_requests == 0) {
1157 dout(" no requests, canceling timeout\n");
1158 __cancel_osd_timeout(osdc);
f24e9980
SW		 1159 }
1160}
1161
1162/*
1163 * Cancel a previously queued request message
1164 */
1165static void __cancel_request(struct ceph_osd_request *req)
1166{
6bc18876 1167 if (req->r_sent && req->r_osd) {
6740a845 1168 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1169 req->r_sent = 0;
1170 }
1171}
1172
a40c4f10
YS		 1173static void __register_linger_request(struct ceph_osd_client *osdc,
1174 struct ceph_osd_request *req)
1175{
1176 dout("__register_linger_request %p\n", req);
96e4dac6 1177 ceph_osdc_get_request(req);
a40c4f10 1178 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89
SW		 1179 if (req->r_osd)
1180 list_add_tail(&req->r_linger_osd,
1181 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1182}
1183
1184static void __unregister_linger_request(struct ceph_osd_client *osdc,
1185 struct ceph_osd_request *req)
1186{
1187 dout("__unregister_linger_request %p\n", req);
61c74035 1188 list_del_init(&req->r_linger_item);
a40c4f10 1189 if (req->r_osd) {
a40c4f10
YS		 1190 list_del_init(&req->r_linger_osd);
1191
1192 if (list_empty(&req->r_osd->o_requests) &&
1193 list_empty(&req->r_osd->o_linger_requests)) {
1194 dout("moving osd to %p lru\n", req->r_osd);
1195 __move_osd_to_lru(osdc, req->r_osd);
1196 }
fbdb9190
SW		 1197 if (list_empty(&req->r_osd_item))
1198 req->r_osd = NULL;
a40c4f10 1199 }
96e4dac6 1200 ceph_osdc_put_request(req);
a40c4f10
YS		 1201}
1202
1203void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1204 struct ceph_osd_request *req)
1205{
1206 mutex_lock(&osdc->request_mutex);
1207 if (req->r_linger) {
c10ebbf5 1208 req->r_linger = 0;
96e4dac6 1209 __unregister_linger_request(osdc, req);
a40c4f10
YS		 1210 }
1211 mutex_unlock(&osdc->request_mutex);
1212}
1213EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1214
1215void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1216 struct ceph_osd_request *req)
1217{
1218 if (!req->r_linger) {
1219 dout("set_request_linger %p\n", req);
1220 req->r_linger = 1;
a40c4f10
YS		 1221 }
1222}
1223EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1224
f24e9980
SW		 1225/*
1226 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1227 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1228 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1229 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1230 *
1231 * Return 0 if unchanged, 1 if changed, or negative on error.
1232 *
1233 * Caller should hold map_sem for read and request_mutex.
1234 */
6f6c7006 1235static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1236 struct ceph_osd_request *req, int force_resend)
f24e9980 1237{
5b191d99 1238 struct ceph_pg pgid;
d85b7056
SW		 1239 int acting[CEPH_PG_MAX_SIZE];
1240 int o = -1, num = 0;
f24e9980 1241 int err;
f24e9980 1242
6f6c7006 1243 dout("map_request %p tid %lld\n", req, req->r_tid);
41766f87
AE		 1244 err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
1245 ceph_file_layout_pg_pool(req->r_file_layout));
6f6c7006
SW		 1246 if (err) {
1247 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1248 return err;
6f6c7006 1249 }
7740a42f
SW		 1250 req->r_pgid = pgid;
1251
d85b7056
SW		 1252 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1253 if (err > 0) {
1254 o = acting[0];
1255 num = err;
1256 }
f24e9980 1257
38d6453c
SW		 1258 if ((!force_resend &&
1259 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1260 req->r_sent >= req->r_osd->o_incarnation &&
1261 req->r_num_pg_osds == num &&
1262 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
f24e9980
SW		 1263 (req->r_osd == NULL && o == -1))
1264 return 0; /* no change */
1265
5b191d99
SW		 1266 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1267 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1268 req->r_osd ? req->r_osd->o_osd : -1);
1269
d85b7056
SW		 1270 /* record full pg acting set */
1271 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1272 req->r_num_pg_osds = num;
1273
f24e9980
SW		 1274 if (req->r_osd) {
1275 __cancel_request(req);
1276 list_del_init(&req->r_osd_item);
f24e9980
SW		 1277 req->r_osd = NULL;
1278 }
1279
1280 req->r_osd = __lookup_osd(osdc, o);
1281 if (!req->r_osd && o >= 0) {
c99eb1c7 1282 err = -ENOMEM;
e10006f8 1283 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1284 if (!req->r_osd) {
1285 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1286 goto out;
6f6c7006 1287 }
f24e9980 1288
6f6c7006 1289 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1290 __insert_osd(osdc, req->r_osd);
1291
b7a9e5dd
SW		 1292 ceph_con_open(&req->r_osd->o_con,
1293 CEPH_ENTITY_TYPE_OSD, o,
1294 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1295 }
1296
f5a2041b
YS		 1297 if (req->r_osd) {
1298 __remove_osd_from_lru(req->r_osd);
ad885927
AE		 1299 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1300 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
6f6c7006 1301 } else {
ad885927 1302 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
f5a2041b 1303 }
d85b7056 1304 err = 1; /* osd or pg changed */
f24e9980
SW		 1305
1306out:
f24e9980
SW		 1307 return err;
1308}
1309
1310/*
1311 * caller should hold map_sem (for read) and request_mutex
1312 */
56e925b6
SW		 1313static void __send_request(struct ceph_osd_client *osdc,
1314 struct ceph_osd_request *req)
f24e9980 1315{
1b83bef2 1316 void *p;
f24e9980 1317
1b83bef2
SW		 1318 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1319 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1320 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1321
1322 /* fill in message content that changes each time we send it */
1323 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1324 put_unaligned_le32(req->r_flags, req->r_request_flags);
1325 put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
1326 p = req->r_request_pgid;
1327 ceph_encode_64(&p, req->r_pgid.pool);
1328 ceph_encode_32(&p, req->r_pgid.seed);
1329 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1330 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1331 sizeof(req->r_reassert_version));
2169aea6 1332
3dd72fc0 1333 req->r_stamp = jiffies;
07a27e22 1334 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1335
1336 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808
AE		 1337
1338 /* Mark the request unsafe if this is the first timet's being sent. */
1339
1340 if (!req->r_sent && req->r_unsafe_callback)
1341 req->r_unsafe_callback(req, true);
f24e9980 1342 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1343
1344 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1345}
1346
6f6c7006
SW		 1347/*
1348 * Send any requests in the queue (req_unsent).
1349 */
f9d25199 1350static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1351{
1352 struct ceph_osd_request *req, *tmp;
1353
f9d25199
AE		 1354 dout("__send_queued\n");
1355 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1356 __send_request(osdc, req);
6f6c7006
SW		 1357}
1358
f24e9980
SW		 1359/*
1360 * Timeout callback, called every N seconds when 1 or more osd
1361 * requests has been active for more than N seconds. When this
1362 * happens, we ping all OSDs with requests who have timed out to
1363 * ensure any communications channel reset is detected. Reset the
1364 * request timeouts another N seconds in the future as we go.
1365 * Reschedule the timeout event another N seconds in future (unless
1366 * there are no open requests).
1367 */
1368static void handle_timeout(struct work_struct *work)
1369{
1370 struct ceph_osd_client *osdc =
1371 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1372 struct ceph_osd_request *req;
f24e9980 1373 struct ceph_osd *osd;
422d2cb8 1374 unsigned long keepalive =
3d14c5d2 1375 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1376 struct list_head slow_osds;
f24e9980
SW		 1377 dout("timeout\n");
1378 down_read(&osdc->map_sem);
1379
1380 ceph_monc_request_next_osdmap(&osdc->client->monc);
1381
1382 mutex_lock(&osdc->request_mutex);
f24e9980 1383
422d2cb8
YS		 1384 /*
1385 * ping osds that are a bit slow. this ensures that if there
1386 * is a break in the TCP connection we will notice, and reopen
1387 * a connection with that osd (from the fault callback).
1388 */
1389 INIT_LIST_HEAD(&slow_osds);
1390 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1391 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1392 break;
1393
1394 osd = req->r_osd;
1395 BUG_ON(!osd);
1396 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1397 req->r_tid, osd->o_osd);
422d2cb8
YS		 1398 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1399 }
1400 while (!list_empty(&slow_osds)) {
1401 osd = list_entry(slow_osds.next, struct ceph_osd,
1402 o_keepalive_item);
1403 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1404 ceph_con_keepalive(&osd->o_con);
1405 }
1406
422d2cb8 1407 __schedule_osd_timeout(osdc);
f9d25199 1408 __send_queued(osdc);
f24e9980 1409 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1410 up_read(&osdc->map_sem);
1411}
1412
f5a2041b
YS		 1413static void handle_osds_timeout(struct work_struct *work)
1414{
1415 struct ceph_osd_client *osdc =
1416 container_of(work, struct ceph_osd_client,
1417 osds_timeout_work.work);
1418 unsigned long delay =
3d14c5d2 1419 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1420
1421 dout("osds timeout\n");
1422 down_read(&osdc->map_sem);
aca420bc 1423 remove_old_osds(osdc);
f5a2041b
YS		 1424 up_read(&osdc->map_sem);
1425
1426 schedule_delayed_work(&osdc->osds_timeout_work,
1427 round_jiffies_relative(delay));
1428}
1429
25845472
SW		 1430static void complete_request(struct ceph_osd_request *req)
1431{
26be8808
AE		 1432 if (req->r_unsafe_callback)
1433 req->r_unsafe_callback(req, false);
25845472
SW		 1434 complete_all(&req->r_safe_completion); /* fsync waiter */
1435}
1436
f24e9980
SW		 1437/*
1438 * handle osd op reply. either call the callback if it is specified,
1439 * or do the completion to wake up the waiting thread.
1440 */
350b1c32
SW		 1441static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1442 struct ceph_connection *con)
f24e9980 1443{
1b83bef2 1444 void *p, *end;
f24e9980
SW		 1445 struct ceph_osd_request *req;
1446 u64 tid;
1b83bef2 1447 int object_len;
79528734
AE		 1448 unsigned int numops;
1449 int payload_len, flags;
0ceed5db 1450 s32 result;
1b83bef2
SW		 1451 s32 retry_attempt;
1452 struct ceph_pg pg;
1453 int err;
1454 u32 reassert_epoch;
1455 u64 reassert_version;
1456 u32 osdmap_epoch;
0d5af164 1457 int already_completed;
9fc6e064 1458 u32 bytes;
79528734 1459 unsigned int i;
f24e9980 1460
6df058c0 1461 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1462 dout("handle_reply %p tid %llu\n", msg, tid);
1463
1464 p = msg->front.iov_base;
1465 end = p + msg->front.iov_len;
1466
1467 ceph_decode_need(&p, end, 4, bad);
1468 object_len = ceph_decode_32(&p);
1469 ceph_decode_need(&p, end, object_len, bad);
1470 p += object_len;
1471
ef4859d6 1472 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1473 if (err)
f24e9980 1474 goto bad;
1b83bef2
SW		 1475
1476 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1477 flags = ceph_decode_64(&p);
1478 result = ceph_decode_32(&p);
1479 reassert_epoch = ceph_decode_32(&p);
1480 reassert_version = ceph_decode_64(&p);
1481 osdmap_epoch = ceph_decode_32(&p);
1482
f24e9980
SW		 1483 /* lookup */
1484 mutex_lock(&osdc->request_mutex);
1485 req = __lookup_request(osdc, tid);
1486 if (req == NULL) {
1487 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1488 goto bad_mutex;
f24e9980
SW		 1489 }
1490 ceph_osdc_get_request(req);
1b83bef2
SW		 1491
1492 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1493 req, result);
1494
1495 ceph_decode_need(&p, end, 4, bad);
1496 numops = ceph_decode_32(&p);
1497 if (numops > CEPH_OSD_MAX_OP)
1498 goto bad_put;
1499 if (numops != req->r_num_ops)
1500 goto bad_put;
1501 payload_len = 0;
1502 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad);
1503 for (i = 0; i < numops; i++) {
1504 struct ceph_osd_op *op = p;
1505 int len;
1506
1507 len = le32_to_cpu(op->payload_len);
1508 req->r_reply_op_len[i] = len;
1509 dout(" op %d has %d bytes\n", i, len);
1510 payload_len += len;
1511 p += sizeof(*op);
1512 }
9fc6e064
AE		 1513 bytes = le32_to_cpu(msg->hdr.data_len);
1514 if (payload_len != bytes) {
1b83bef2 1515 pr_warning("sum of op payload lens %d != data_len %d",
9fc6e064 1516 payload_len, bytes);
1b83bef2
SW		 1517 goto bad_put;
1518 }
1519
1520 ceph_decode_need(&p, end, 4 + numops * 4, bad);
1521 retry_attempt = ceph_decode_32(&p);
1522 for (i = 0; i < numops; i++)
1523 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1524
eb845ff1
YZ		 1525 already_completed = req->r_got_reply;
1526
f24e9980 1527 if (!req->r_got_reply) {
f24e9980 1528
1b83bef2 1529 req->r_result = result;
f24e9980
SW		 1530 dout("handle_reply result %d bytes %d\n", req->r_result,
1531 bytes);
1532 if (req->r_result == 0)
1533 req->r_result = bytes;
1534
1535 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1536 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1537 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1538
1539 req->r_got_reply = 1;
1540 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1541 dout("handle_reply tid %llu dup ack\n", tid);
34b43a56 1542 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1543 goto done;
1544 }
1545
1546 dout("handle_reply tid %llu flags %d\n", tid, flags);
1547
a40c4f10
YS		 1548 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1549 __register_linger_request(osdc, req);
1550
f24e9980 1551 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1552 if (result < 0 ||
1553 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1554 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1555 __unregister_request(osdc, req);
1556
1557 mutex_unlock(&osdc->request_mutex);
1558
eb845ff1
YZ		 1559 if (!already_completed) {
1560 if (req->r_callback)
1561 req->r_callback(req, msg);
1562 else
1563 complete_all(&req->r_completion);
1564 }
f24e9980 1565
25845472
SW		 1566 if (flags & CEPH_OSD_FLAG_ONDISK)
1567 complete_request(req);
f24e9980
SW		 1568
1569done:
a40c4f10 1570 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1571 ceph_osdc_put_request(req);
1572 return;
1573
1b83bef2
SW		 1574bad_put:
1575 ceph_osdc_put_request(req);
8058fd45
AE		 1576bad_mutex:
1577 mutex_unlock(&osdc->request_mutex);
f24e9980 1578bad:
1b83bef2
SW		 1579 pr_err("corrupt osd_op_reply got %d %d\n",
1580 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1581 ceph_msg_dump(msg);
f24e9980
SW		 1582}
1583
6f6c7006 1584static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1585{
f24e9980 1586 struct rb_node *p, *n;
f24e9980 1587
6f6c7006
SW		 1588 for (p = rb_first(&osdc->osds); p; p = n) {
1589 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1590
6f6c7006
SW		 1591 n = rb_next(p);
1592 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1593 memcmp(&osd->o_con.peer_addr,
1594 ceph_osd_addr(osdc->osdmap,
1595 osd->o_osd),
1596 sizeof(struct ceph_entity_addr)) != 0)
1597 __reset_osd(osdc, osd);
f24e9980 1598 }
422d2cb8
YS		 1599}
1600
1601/*
6f6c7006
SW		 1602 * Requeue requests whose mapping to an OSD has changed. If requests map to
1603 * no osd, request a new map.
422d2cb8 1604 *
e6d50f67 1605 * Caller should hold map_sem for read.
422d2cb8 1606 */
38d6453c 1607static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
422d2cb8 1608{
a40c4f10 1609 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1610 struct rb_node *p;
1611 int needmap = 0;
1612 int err;
422d2cb8 1613
38d6453c 1614 dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
422d2cb8 1615 mutex_lock(&osdc->request_mutex);
6194ea89 1616 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1617 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1618 p = rb_next(p);
ab60b16d
AE		 1619
1620 /*
1621 * For linger requests that have not yet been
1622 * registered, move them to the linger list; they'll
1623 * be sent to the osd in the loop below. Unregister
1624 * the request before re-registering it as a linger
1625 * request to ensure the __map_request() below
1626 * will decide it needs to be sent.
1627 */
1628 if (req->r_linger && list_empty(&req->r_linger_item)) {
1629 dout("%p tid %llu restart on osd%d\n",
1630 req, req->r_tid,
1631 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 1632 ceph_osdc_get_request(req);
ab60b16d
AE		 1633 __unregister_request(osdc, req);
1634 __register_linger_request(osdc, req);
96e4dac6 1635 ceph_osdc_put_request(req);
ab60b16d
AE		 1636 continue;
1637 }
1638
38d6453c 1639 err = __map_request(osdc, req, force_resend);
6f6c7006
SW		 1640 if (err < 0)
1641 continue; /* error */
1642 if (req->r_osd == NULL) {
1643 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1644 needmap++; /* request a newer map */
1645 } else if (err > 0) {
6194ea89
SW		 1646 if (!req->r_linger) {
1647 dout("%p tid %llu requeued on osd%d\n", req,
1648 req->r_tid,
1649 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1650 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1651 }
1652 }
a40c4f10
YS		 1653 }
1654
1655 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1656 r_linger_item) {
1657 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1658
38d6453c 1659 err = __map_request(osdc, req, force_resend);
ab60b16d 1660 dout("__map_request returned %d\n", err);
a40c4f10
YS		 1661 if (err == 0)
1662 continue; /* no change and no osd was specified */
1663 if (err < 0)
1664 continue; /* hrm! */
1665 if (req->r_osd == NULL) {
1666 dout("tid %llu maps to no valid osd\n", req->r_tid);
1667 needmap++; /* request a newer map */
1668 continue;
6f6c7006 1669 }
a40c4f10
YS		 1670
1671 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1672 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1673 __register_request(osdc, req);
c89ce05e 1674 __unregister_linger_request(osdc, req);
6f6c7006 1675 }
14d2f38d 1676 reset_changed_osds(osdc);
f24e9980
SW		 1677 mutex_unlock(&osdc->request_mutex);
1678
1679 if (needmap) {
1680 dout("%d requests for down osds, need new map\n", needmap);
1681 ceph_monc_request_next_osdmap(&osdc->client->monc);
1682 }
422d2cb8 1683}
6f6c7006
SW		 1684
1685
f24e9980
SW		 1686/*
1687 * Process updated osd map.
1688 *
1689 * The message contains any number of incremental and full maps, normally
1690 * indicating some sort of topology change in the cluster. Kick requests
1691 * off to different OSDs as needed.
1692 */
1693void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1694{
1695 void *p, *end, *next;
1696 u32 nr_maps, maplen;
1697 u32 epoch;
1698 struct ceph_osdmap *newmap = NULL, *oldmap;
1699 int err;
1700 struct ceph_fsid fsid;
1701
1702 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1703 p = msg->front.iov_base;
1704 end = p + msg->front.iov_len;
1705
1706 /* verify fsid */
1707 ceph_decode_need(&p, end, sizeof(fsid), bad);
1708 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 1709 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1710 return;
f24e9980
SW		 1711
1712 down_write(&osdc->map_sem);
1713
1714 /* incremental maps */
1715 ceph_decode_32_safe(&p, end, nr_maps, bad);
1716 dout(" %d inc maps\n", nr_maps);
1717 while (nr_maps > 0) {
1718 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 1719 epoch = ceph_decode_32(&p);
1720 maplen = ceph_decode_32(&p);
f24e9980
SW		 1721 ceph_decode_need(&p, end, maplen, bad);
1722 next = p + maplen;
1723 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1724 dout("applying incremental map %u len %d\n",
1725 epoch, maplen);
1726 newmap = osdmap_apply_incremental(&p, next,
1727 osdc->osdmap,
15d9882c 1728 &osdc->client->msgr);
f24e9980
SW		 1729 if (IS_ERR(newmap)) {
1730 err = PTR_ERR(newmap);
1731 goto bad;
1732 }
30dc6381 1733 BUG_ON(!newmap);
f24e9980
SW		 1734 if (newmap != osdc->osdmap) {
1735 ceph_osdmap_destroy(osdc->osdmap);
1736 osdc->osdmap = newmap;
1737 }
38d6453c 1738 kick_requests(osdc, 0);
f24e9980
SW		 1739 } else {
1740 dout("ignoring incremental map %u len %d\n",
1741 epoch, maplen);
1742 }
1743 p = next;
1744 nr_maps--;
1745 }
1746 if (newmap)
1747 goto done;
1748
1749 /* full maps */
1750 ceph_decode_32_safe(&p, end, nr_maps, bad);
1751 dout(" %d full maps\n", nr_maps);
1752 while (nr_maps) {
1753 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 1754 epoch = ceph_decode_32(&p);
1755 maplen = ceph_decode_32(&p);
f24e9980
SW		 1756 ceph_decode_need(&p, end, maplen, bad);
1757 if (nr_maps > 1) {
1758 dout("skipping non-latest full map %u len %d\n",
1759 epoch, maplen);
1760 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1761 dout("skipping full map %u len %d, "
1762 "older than our %u\n", epoch, maplen,
1763 osdc->osdmap->epoch);
1764 } else {
38d6453c
SW		 1765 int skipped_map = 0;
1766
f24e9980
SW		 1767 dout("taking full map %u len %d\n", epoch, maplen);
1768 newmap = osdmap_decode(&p, p+maplen);
1769 if (IS_ERR(newmap)) {
1770 err = PTR_ERR(newmap);
1771 goto bad;
1772 }
30dc6381 1773 BUG_ON(!newmap);
f24e9980
SW		 1774 oldmap = osdc->osdmap;
1775 osdc->osdmap = newmap;
38d6453c
SW		 1776 if (oldmap) {
1777 if (oldmap->epoch + 1 < newmap->epoch)
1778 skipped_map = 1;
f24e9980 1779 ceph_osdmap_destroy(oldmap);
38d6453c
SW		 1780 }
1781 kick_requests(osdc, skipped_map);
f24e9980
SW		 1782 }
1783 p += maplen;
1784 nr_maps--;
1785 }
1786
1787done:
1788 downgrade_write(&osdc->map_sem);
1789 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 1790
1791 /*
1792 * subscribe to subsequent osdmap updates if full to ensure
1793 * we find out when we are no longer full and stop returning
1794 * ENOSPC.
1795 */
1796 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
1797 ceph_monc_request_next_osdmap(&osdc->client->monc);
1798
f9d25199
AE		 1799 mutex_lock(&osdc->request_mutex);
1800 __send_queued(osdc);
1801 mutex_unlock(&osdc->request_mutex);
f24e9980 1802 up_read(&osdc->map_sem);
03066f23 1803 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 1804 return;
1805
1806bad:
1807 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 1808 ceph_msg_dump(msg);
f24e9980
SW		 1809 up_write(&osdc->map_sem);
1810 return;
1811}
1812
a40c4f10
YS		 1813/*
1814 * watch/notify callback event infrastructure
1815 *
1816 * These callbacks are used both for watch and notify operations.
1817 */
1818static void __release_event(struct kref *kref)
1819{
1820 struct ceph_osd_event *event =
1821 container_of(kref, struct ceph_osd_event, kref);
1822
1823 dout("__release_event %p\n", event);
1824 kfree(event);
1825}
1826
1827static void get_event(struct ceph_osd_event *event)
1828{
1829 kref_get(&event->kref);
1830}
1831
1832void ceph_osdc_put_event(struct ceph_osd_event *event)
1833{
1834 kref_put(&event->kref, __release_event);
1835}
1836EXPORT_SYMBOL(ceph_osdc_put_event);
1837
1838static void __insert_event(struct ceph_osd_client *osdc,
1839 struct ceph_osd_event *new)
1840{
1841 struct rb_node **p = &osdc->event_tree.rb_node;
1842 struct rb_node *parent = NULL;
1843 struct ceph_osd_event *event = NULL;
1844
1845 while (*p) {
1846 parent = *p;
1847 event = rb_entry(parent, struct ceph_osd_event, node);
1848 if (new->cookie < event->cookie)
1849 p = &(*p)->rb_left;
1850 else if (new->cookie > event->cookie)
1851 p = &(*p)->rb_right;
1852 else
1853 BUG();
1854 }
1855
1856 rb_link_node(&new->node, parent, p);
1857 rb_insert_color(&new->node, &osdc->event_tree);
1858}
1859
1860static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
1861 u64 cookie)
1862{
1863 struct rb_node **p = &osdc->event_tree.rb_node;
1864 struct rb_node *parent = NULL;
1865 struct ceph_osd_event *event = NULL;
1866
1867 while (*p) {
1868 parent = *p;
1869 event = rb_entry(parent, struct ceph_osd_event, node);
1870 if (cookie < event->cookie)
1871 p = &(*p)->rb_left;
1872 else if (cookie > event->cookie)
1873 p = &(*p)->rb_right;
1874 else
1875 return event;
1876 }
1877 return NULL;
1878}
1879
1880static void __remove_event(struct ceph_osd_event *event)
1881{
1882 struct ceph_osd_client *osdc = event->osdc;
1883
1884 if (!RB_EMPTY_NODE(&event->node)) {
1885 dout("__remove_event removed %p\n", event);
1886 rb_erase(&event->node, &osdc->event_tree);
1887 ceph_osdc_put_event(event);
1888 } else {
1889 dout("__remove_event didn't remove %p\n", event);
1890 }
1891}
1892
1893int ceph_osdc_create_event(struct ceph_osd_client *osdc,
1894 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 1895 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 1896{
1897 struct ceph_osd_event *event;
1898
1899 event = kmalloc(sizeof(*event), GFP_NOIO);
1900 if (!event)
1901 return -ENOMEM;
1902
1903 dout("create_event %p\n", event);
1904 event->cb = event_cb;
3c663bbd 1905 event->one_shot = 0;
a40c4f10
YS		 1906 event->data = data;
1907 event->osdc = osdc;
1908 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 1909 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 1910 kref_init(&event->kref); /* one ref for us */
1911 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 1912
1913 spin_lock(&osdc->event_lock);
1914 event->cookie = ++osdc->event_count;
1915 __insert_event(osdc, event);
1916 spin_unlock(&osdc->event_lock);
1917
1918 *pevent = event;
1919 return 0;
1920}
1921EXPORT_SYMBOL(ceph_osdc_create_event);
1922
1923void ceph_osdc_cancel_event(struct ceph_osd_event *event)
1924{
1925 struct ceph_osd_client *osdc = event->osdc;
1926
1927 dout("cancel_event %p\n", event);
1928 spin_lock(&osdc->event_lock);
1929 __remove_event(event);
1930 spin_unlock(&osdc->event_lock);
1931 ceph_osdc_put_event(event); /* caller's */
1932}
1933EXPORT_SYMBOL(ceph_osdc_cancel_event);
1934
1935
1936static void do_event_work(struct work_struct *work)
1937{
1938 struct ceph_osd_event_work *event_work =
1939 container_of(work, struct ceph_osd_event_work, work);
1940 struct ceph_osd_event *event = event_work->event;
1941 u64 ver = event_work->ver;
1942 u64 notify_id = event_work->notify_id;
1943 u8 opcode = event_work->opcode;
1944
1945 dout("do_event_work completing %p\n", event);
1946 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 1947 dout("do_event_work completed %p\n", event);
1948 ceph_osdc_put_event(event);
1949 kfree(event_work);
1950}
1951
1952
1953/*
1954 * Process osd watch notifications
1955 */
3c663bbd
AE		 1956static void handle_watch_notify(struct ceph_osd_client *osdc,
1957 struct ceph_msg *msg)
a40c4f10
YS		 1958{
1959 void *p, *end;
1960 u8 proto_ver;
1961 u64 cookie, ver, notify_id;
1962 u8 opcode;
1963 struct ceph_osd_event *event;
1964 struct ceph_osd_event_work *event_work;
1965
1966 p = msg->front.iov_base;
1967 end = p + msg->front.iov_len;
1968
1969 ceph_decode_8_safe(&p, end, proto_ver, bad);
1970 ceph_decode_8_safe(&p, end, opcode, bad);
1971 ceph_decode_64_safe(&p, end, cookie, bad);
1972 ceph_decode_64_safe(&p, end, ver, bad);
1973 ceph_decode_64_safe(&p, end, notify_id, bad);
1974
1975 spin_lock(&osdc->event_lock);
1976 event = __find_event(osdc, cookie);
1977 if (event) {
3c663bbd 1978 BUG_ON(event->one_shot);
a40c4f10 1979 get_event(event);
a40c4f10
YS		 1980 }
1981 spin_unlock(&osdc->event_lock);
1982 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
1983 cookie, ver, event);
1984 if (event) {
1985 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10
YS		 1986 if (!event_work) {
1987 dout("ERROR: could not allocate event_work\n");
1988 goto done_err;
1989 }
6b0ae409 1990 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 1991 event_work->event = event;
1992 event_work->ver = ver;
1993 event_work->notify_id = notify_id;
1994 event_work->opcode = opcode;
1995 if (!queue_work(osdc->notify_wq, &event_work->work)) {
1996 dout("WARNING: failed to queue notify event work\n");
1997 goto done_err;
1998 }
1999 }
2000
2001 return;
2002
2003done_err:
a40c4f10
YS		 2004 ceph_osdc_put_event(event);
2005 return;
2006
2007bad:
2008 pr_err("osdc handle_watch_notify corrupt msg\n");
2009 return;
2010}
2011
e65550fd
AE		 2012/*
2013 * build new request AND message
2014 *
2015 */
2016void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2017 struct ceph_snap_context *snapc, u64 snap_id,
2018 struct timespec *mtime)
2019{
2020 struct ceph_msg *msg = req->r_request;
2021 void *p;
2022 size_t msg_size;
2023 int flags = req->r_flags;
2024 u64 data_len;
2025 unsigned int i;
2026
2027 req->r_snapid = snap_id;
2028 req->r_snapc = ceph_get_snap_context(snapc);
2029
2030 /* encode request */
2031 msg->hdr.version = cpu_to_le16(4);
2032
2033 p = msg->front.iov_base;
2034 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2035 req->r_request_osdmap_epoch = p;
2036 p += 4;
2037 req->r_request_flags = p;
2038 p += 4;
2039 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2040 ceph_encode_timespec(p, mtime);
2041 p += sizeof(struct ceph_timespec);
2042 req->r_request_reassert_version = p;
2043 p += sizeof(struct ceph_eversion); /* will get filled in */
2044
2045 /* oloc */
2046 ceph_encode_8(&p, 4);
2047 ceph_encode_8(&p, 4);
2048 ceph_encode_32(&p, 8 + 4 + 4);
2049 req->r_request_pool = p;
2050 p += 8;
2051 ceph_encode_32(&p, -1); /* preferred */
2052 ceph_encode_32(&p, 0); /* key len */
2053
2054 ceph_encode_8(&p, 1);
2055 req->r_request_pgid = p;
2056 p += 8 + 4;
2057 ceph_encode_32(&p, -1); /* preferred */
2058
2059 /* oid */
2060 ceph_encode_32(&p, req->r_oid_len);
2061 memcpy(p, req->r_oid, req->r_oid_len);
2062 dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
2063 p += req->r_oid_len;
2064
2065 /* ops--can imply data */
2066 ceph_encode_16(&p, (u16)req->r_num_ops);
2067 data_len = 0;
2068 for (i = 0; i < req->r_num_ops; i++) {
2069 data_len += osd_req_encode_op(req, p, i);
2070 p += sizeof(struct ceph_osd_op);
2071 }
2072
2073 /* snaps */
2074 ceph_encode_64(&p, req->r_snapid);
2075 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2076 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2077 if (req->r_snapc) {
2078 for (i = 0; i < snapc->num_snaps; i++) {
2079 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2080 }
2081 }
2082
2083 req->r_request_attempts = p;
2084 p += 4;
2085
2086 /* data */
2087 if (flags & CEPH_OSD_FLAG_WRITE) {
2088 u16 data_off;
2089
2090 /*
2091 * The header "data_off" is a hint to the receiver
2092 * allowing it to align received data into its
2093 * buffers such that there's no need to re-copy
2094 * it before writing it to disk (direct I/O).
2095 */
2096 data_off = (u16) (off & 0xffff);
2097 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2098 }
2099 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2100
2101 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2102 msg_size = p - msg->front.iov_base;
2103 msg->front.iov_len = msg_size;
2104 msg->hdr.front_len = cpu_to_le32(msg_size);
2105
2106 dout("build_request msg_size was %d\n", (int)msg_size);
2107}
2108EXPORT_SYMBOL(ceph_osdc_build_request);
2109
70636773
AE		 2110/*
2111 * Register request, send initial attempt.
2112 */
2113int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2114 struct ceph_osd_request *req,
2115 bool nofail)
2116{
2117 int rc = 0;
2118
f24e9980
SW		 2119 down_read(&osdc->map_sem);
2120 mutex_lock(&osdc->request_mutex);
dc4b870c 2121 __register_request(osdc, req);
c10ebbf5
AE		 2122 req->r_sent = 0;
2123 req->r_got_reply = 0;
92451b49
AE		 2124 rc = __map_request(osdc, req, 0);
2125 if (rc < 0) {
2126 if (nofail) {
2127 dout("osdc_start_request failed map, "
2128 " will retry %lld\n", req->r_tid);
2129 rc = 0;
f24e9980 2130 }
92451b49 2131 goto out_unlock;
f24e9980 2132 }
92451b49
AE		 2133 if (req->r_osd == NULL) {
2134 dout("send_request %p no up osds in pg\n", req);
2135 ceph_monc_request_next_osdmap(&osdc->client->monc);
2136 } else {
7e2766a1 2137 __send_queued(osdc);
92451b49
AE		 2138 }
2139 rc = 0;
234af26f 2140out_unlock:
f24e9980
SW		 2141 mutex_unlock(&osdc->request_mutex);
2142 up_read(&osdc->map_sem);
2143 return rc;
2144}
3d14c5d2 2145EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980
SW		 2146
2147/*
2148 * wait for a request to complete
2149 */
2150int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2151 struct ceph_osd_request *req)
2152{
2153 int rc;
2154
2155 rc = wait_for_completion_interruptible(&req->r_completion);
2156 if (rc < 0) {
2157 mutex_lock(&osdc->request_mutex);
2158 __cancel_request(req);
529cfcc4 2159 __unregister_request(osdc, req);
f24e9980 2160 mutex_unlock(&osdc->request_mutex);
25845472 2161 complete_request(req);
529cfcc4 2162 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
f24e9980
SW		 2163 return rc;
2164 }
2165
2166 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2167 return req->r_result;
2168}
3d14c5d2 2169EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2170
2171/*
2172 * sync - wait for all in-flight requests to flush. avoid starvation.
2173 */
2174void ceph_osdc_sync(struct ceph_osd_client *osdc)
2175{
2176 struct ceph_osd_request *req;
2177 u64 last_tid, next_tid = 0;
2178
2179 mutex_lock(&osdc->request_mutex);
2180 last_tid = osdc->last_tid;
2181 while (1) {
2182 req = __lookup_request_ge(osdc, next_tid);
2183 if (!req)
2184 break;
2185 if (req->r_tid > last_tid)
2186 break;
2187
2188 next_tid = req->r_tid + 1;
2189 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2190 continue;
2191
2192 ceph_osdc_get_request(req);
2193 mutex_unlock(&osdc->request_mutex);
2194 dout("sync waiting on tid %llu (last is %llu)\n",
2195 req->r_tid, last_tid);
2196 wait_for_completion(&req->r_safe_completion);
2197 mutex_lock(&osdc->request_mutex);
2198 ceph_osdc_put_request(req);
2199 }
2200 mutex_unlock(&osdc->request_mutex);
2201 dout("sync done (thru tid %llu)\n", last_tid);
2202}
3d14c5d2 2203EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980
SW		 2204
2205/*
2206 * init, shutdown
2207 */
2208int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2209{
2210 int err;
2211
2212 dout("init\n");
2213 osdc->client = client;
2214 osdc->osdmap = NULL;
2215 init_rwsem(&osdc->map_sem);
2216 init_completion(&osdc->map_waiters);
2217 osdc->last_requested_map = 0;
2218 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2219 osdc->last_tid = 0;
2220 osdc->osds = RB_ROOT;
f5a2041b 2221 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2222 osdc->requests = RB_ROOT;
422d2cb8 2223 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2224 INIT_LIST_HEAD(&osdc->req_unsent);
2225 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2226 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2227 osdc->num_requests = 0;
2228 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2229 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2230 spin_lock_init(&osdc->event_lock);
2231 osdc->event_tree = RB_ROOT;
2232 osdc->event_count = 0;
f5a2041b
YS		 2233
2234 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2235 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2236
5f44f142 2237 err = -ENOMEM;
f24e9980
SW		 2238 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2239 sizeof(struct ceph_osd_request));
2240 if (!osdc->req_mempool)
5f44f142 2241 goto out;
f24e9980 2242
d50b409f
SW		 2243 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2244 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2245 "osd_op");
f24e9980 2246 if (err < 0)
5f44f142 2247 goto out_mempool;
d50b409f 2248 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2249 OSD_OPREPLY_FRONT_LEN, 10, true,
2250 "osd_op_reply");
c16e7869
SW		 2251 if (err < 0)
2252 goto out_msgpool;
a40c4f10
YS		 2253
2254 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2255 if (IS_ERR(osdc->notify_wq)) {
2256 err = PTR_ERR(osdc->notify_wq);
2257 osdc->notify_wq = NULL;
2258 goto out_msgpool;
2259 }
f24e9980 2260 return 0;
5f44f142 2261
c16e7869
SW		 2262out_msgpool:
2263 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2264out_mempool:
2265 mempool_destroy(osdc->req_mempool);
2266out:
2267 return err;
f24e9980
SW		 2268}
2269
2270void ceph_osdc_stop(struct ceph_osd_client *osdc)
2271{
a40c4f10
YS		 2272 flush_workqueue(osdc->notify_wq);
2273 destroy_workqueue(osdc->notify_wq);
f24e9980 2274 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2275 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2276 if (osdc->osdmap) {
2277 ceph_osdmap_destroy(osdc->osdmap);
2278 osdc->osdmap = NULL;
2279 }
aca420bc 2280 remove_all_osds(osdc);
f24e9980
SW		 2281 mempool_destroy(osdc->req_mempool);
2282 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2283 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2284}
2285
2286/*
2287 * Read some contiguous pages. If we cross a stripe boundary, shorten
2288 * *plen. Return number of bytes read, or error.
2289 */
2290int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2291 struct ceph_vino vino, struct ceph_file_layout *layout,
2292 u64 off, u64 *plen,
2293 u32 truncate_seq, u64 truncate_size,
b7495fc2 2294 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2295{
2296 struct ceph_osd_request *req;
2297 int rc = 0;
2298
2299 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2300 vino.snap, off, *plen);
79528734 2301 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
f24e9980 2302 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2303 NULL, truncate_seq, truncate_size,
153e5167 2304 false);
6816282d
SW		 2305 if (IS_ERR(req))
2306 return PTR_ERR(req);
f24e9980
SW		 2307
2308 /* it may be a short read due to an object boundary */
0fff87ec 2309
406e2c9f 2310 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2311 pages, *plen, page_align, false, false);
f24e9980 2312
e0c59487 2313 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2314 off, *plen, *plen, page_align);
f24e9980 2315
79528734 2316 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2317
f24e9980
SW		 2318 rc = ceph_osdc_start_request(osdc, req, false);
2319 if (!rc)
2320 rc = ceph_osdc_wait_request(osdc, req);
2321
2322 ceph_osdc_put_request(req);
2323 dout("readpages result %d\n", rc);
2324 return rc;
2325}
3d14c5d2 2326EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2327
2328/*
2329 * do a synchronous write on N pages
2330 */
2331int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2332 struct ceph_file_layout *layout,
2333 struct ceph_snap_context *snapc,
2334 u64 off, u64 len,
2335 u32 truncate_seq, u64 truncate_size,
2336 struct timespec *mtime,
24808826 2337 struct page **pages, int num_pages)
f24e9980
SW		 2338{
2339 struct ceph_osd_request *req;
2340 int rc = 0;
b7495fc2 2341 int page_align = off & ~PAGE_MASK;
f24e9980 2342
acead002 2343 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
79528734 2344 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
f24e9980 2345 CEPH_OSD_OP_WRITE,
24808826 2346 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2347 snapc, truncate_seq, truncate_size,
153e5167 2348 true);
6816282d
SW		 2349 if (IS_ERR(req))
2350 return PTR_ERR(req);
f24e9980
SW		 2351
2352 /* it may be a short write due to an object boundary */
406e2c9f 2353 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2354 false, false);
2355 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2356
79528734 2357 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2358
87f979d3 2359 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2360 if (!rc)
2361 rc = ceph_osdc_wait_request(osdc, req);
2362
2363 ceph_osdc_put_request(req);
2364 if (rc == 0)
2365 rc = len;
2366 dout("writepages result %d\n", rc);
2367 return rc;
2368}
3d14c5d2 2369EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2370
5522ae0b
AE		 2371int ceph_osdc_setup(void)
2372{
2373 BUG_ON(ceph_osd_request_cache);
2374 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2375 sizeof (struct ceph_osd_request),
2376 __alignof__(struct ceph_osd_request),
2377 0, NULL);
2378
2379 return ceph_osd_request_cache ? 0 : -ENOMEM;
2380}
2381EXPORT_SYMBOL(ceph_osdc_setup);
2382
2383void ceph_osdc_cleanup(void)
2384{
2385 BUG_ON(!ceph_osd_request_cache);
2386 kmem_cache_destroy(ceph_osd_request_cache);
2387 ceph_osd_request_cache = NULL;
2388}
2389EXPORT_SYMBOL(ceph_osdc_cleanup);
2390
f24e9980
SW		 2391/*
2392 * handle incoming message
2393 */
2394static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2395{
2396 struct ceph_osd *osd = con->private;
32c895e7 2397 struct ceph_osd_client *osdc;
f24e9980
SW		 2398 int type = le16_to_cpu(msg->hdr.type);
2399
2400 if (!osd)
4a32f93d 2401 goto out;
32c895e7 2402 osdc = osd->o_osdc;
f24e9980
SW		 2403
2404 switch (type) {
2405 case CEPH_MSG_OSD_MAP:
2406 ceph_osdc_handle_map(osdc, msg);
2407 break;
2408 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2409 handle_reply(osdc, msg, con);
f24e9980 2410 break;
a40c4f10
YS		 2411 case CEPH_MSG_WATCH_NOTIFY:
2412 handle_watch_notify(osdc, msg);
2413 break;
f24e9980
SW		 2414
2415 default:
2416 pr_err("received unknown message type %d %s\n", type,
2417 ceph_msg_type_name(type));
2418 }
4a32f93d 2419out:
f24e9980
SW		 2420 ceph_msg_put(msg);
2421}
2422
5b3a4db3 2423/*
21b667f6
SW		 2424 * lookup and return message for incoming reply. set up reply message
2425 * pages.
5b3a4db3
SW		 2426 */
2427static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2428 struct ceph_msg_header *hdr,
2429 int *skip)
f24e9980
SW		 2430{
2431 struct ceph_osd *osd = con->private;
2432 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2433 struct ceph_msg *m;
0547a9b3 2434 struct ceph_osd_request *req;
5b3a4db3
SW		 2435 int front = le32_to_cpu(hdr->front_len);
2436 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2437 u64 tid;
f24e9980 2438
0547a9b3
YS		 2439 tid = le64_to_cpu(hdr->tid);
2440 mutex_lock(&osdc->request_mutex);
2441 req = __lookup_request(osdc, tid);
2442 if (!req) {
2443 *skip = 1;
2444 m = NULL;
756a16a5
SW		 2445 dout("get_reply unknown tid %llu from osd%d\n", tid,
2446 osd->o_osd);
0547a9b3
YS		 2447 goto out;
2448 }
c16e7869 2449
ace6d3a9 2450 if (req->r_reply->con)
8921d114 2451 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2452 req->r_reply, req->r_reply->con);
2453 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2454
c16e7869 2455 if (front > req->r_reply->front.iov_len) {
4974341e
AE		 2456 pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
2457 front, (int)req->r_reply->front.iov_len,
2458 (unsigned int)con->peer_name.type,
2459 le64_to_cpu(con->peer_name.num));
b61c2763 2460 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
a79832f2 2461 if (!m)
c16e7869
SW		 2462 goto out;
2463 ceph_msg_put(req->r_reply);
2464 req->r_reply = m;
2465 }
2466 m = ceph_msg_get(req->r_reply);
2467
0547a9b3 2468 if (data_len > 0) {
a4ce40a9 2469 struct ceph_osd_data *osd_data;
0fff87ec 2470
a4ce40a9
AE		 2471 /*
2472 * XXX This is assuming there is only one op containing
2473 * XXX page data. Probably OK for reads, but this
2474 * XXX ought to be done more generally.
2475 */
406e2c9f 2476 osd_data = osd_req_op_extent_osd_data(req, 0);
0fff87ec 2477 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2478 if (osd_data->pages &&
e0c59487 2479 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2480
e0c59487
AE		 2481 pr_warning("tid %lld reply has %d bytes "
2482 "we had only %llu bytes ready\n",
2483 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2484 *skip = 1;
2485 ceph_msg_put(m);
2486 m = NULL;
2487 goto out;
2488 }
2ac2b7a6 2489 }
0547a9b3 2490 }
5b3a4db3 2491 *skip = 0;
c16e7869 2492 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2493
2494out:
2495 mutex_unlock(&osdc->request_mutex);
2450418c 2496 return m;
5b3a4db3
SW		 2497
2498}
2499
2500static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2501 struct ceph_msg_header *hdr,
2502 int *skip)
2503{
2504 struct ceph_osd *osd = con->private;
2505 int type = le16_to_cpu(hdr->type);
2506 int front = le32_to_cpu(hdr->front_len);
2507
1c20f2d2 2508 *skip = 0;
5b3a4db3
SW		 2509 switch (type) {
2510 case CEPH_MSG_OSD_MAP:
a40c4f10 2511 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2512 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2513 case CEPH_MSG_OSD_OPREPLY:
2514 return get_reply(con, hdr, skip);
2515 default:
2516 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2517 osd->o_osd);
2518 *skip = 1;
2519 return NULL;
2520 }
f24e9980
SW		 2521}
2522
2523/*
2524 * Wrappers to refcount containing ceph_osd struct
2525 */
2526static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2527{
2528 struct ceph_osd *osd = con->private;
2529 if (get_osd(osd))
2530 return con;
2531 return NULL;
2532}
2533
2534static void put_osd_con(struct ceph_connection *con)
2535{
2536 struct ceph_osd *osd = con->private;
2537 put_osd(osd);
2538}
2539
4e7a5dcd
SW		 2540/*
2541 * authentication
2542 */
a3530df3
AE		 2543/*
2544 * Note: returned pointer is the address of a structure that's
2545 * managed separately. Caller must *not* attempt to free it.
2546 */
2547static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2548 int *proto, int force_new)
4e7a5dcd
SW		 2549{
2550 struct ceph_osd *o = con->private;
2551 struct ceph_osd_client *osdc = o->o_osdc;
2552 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2553 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2554
74f1869f 2555 if (force_new && auth->authorizer) {
27859f97 2556 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2557 auth->authorizer = NULL;
2558 }
27859f97
SW		 2559 if (!auth->authorizer) {
2560 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2561 auth);
4e7a5dcd 2562 if (ret)
a3530df3 2563 return ERR_PTR(ret);
27859f97
SW		 2564 } else {
2565 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2566 auth);
2567 if (ret)
2568 return ERR_PTR(ret);
4e7a5dcd 2569 }
4e7a5dcd 2570 *proto = ac->protocol;
74f1869f 2571
a3530df3 2572 return auth;
4e7a5dcd
SW		 2573}
2574
2575
2576static int verify_authorizer_reply(struct ceph_connection *con, int len)
2577{
2578 struct ceph_osd *o = con->private;
2579 struct ceph_osd_client *osdc = o->o_osdc;
2580 struct ceph_auth_client *ac = osdc->client->monc.auth;
2581
27859f97 2582 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2583}
2584
9bd2e6f8
SW		 2585static int invalidate_authorizer(struct ceph_connection *con)
2586{
2587 struct ceph_osd *o = con->private;
2588 struct ceph_osd_client *osdc = o->o_osdc;
2589 struct ceph_auth_client *ac = osdc->client->monc.auth;
2590
27859f97 2591 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2592 return ceph_monc_validate_auth(&osdc->client->monc);
2593}
4e7a5dcd 2594
9e32789f 2595static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2596 .get = get_osd_con,
2597 .put = put_osd_con,
2598 .dispatch = dispatch,
4e7a5dcd
SW		 2599 .get_authorizer = get_authorizer,
2600 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2601 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2602 .alloc_msg = alloc_msg,
81b024e7 2603 .fault = osd_reset,
f24e9980 2604};
Linux 6.x block layer and io_uring tree(s)