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ceph: tidy ceph_mdsmap_decode() a little
[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);
1177 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89
SW		 1178 if (req->r_osd)
1179 list_add_tail(&req->r_linger_osd,
1180 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1181}
1182
1183static void __unregister_linger_request(struct ceph_osd_client *osdc,
1184 struct ceph_osd_request *req)
1185{
1186 dout("__unregister_linger_request %p\n", req);
61c74035 1187 list_del_init(&req->r_linger_item);
a40c4f10 1188 if (req->r_osd) {
a40c4f10
YS		 1189 list_del_init(&req->r_linger_osd);
1190
1191 if (list_empty(&req->r_osd->o_requests) &&
1192 list_empty(&req->r_osd->o_linger_requests)) {
1193 dout("moving osd to %p lru\n", req->r_osd);
1194 __move_osd_to_lru(osdc, req->r_osd);
1195 }
fbdb9190
SW		 1196 if (list_empty(&req->r_osd_item))
1197 req->r_osd = NULL;
a40c4f10
YS		 1198 }
1199}
1200
1201void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1202 struct ceph_osd_request *req)
1203{
1204 mutex_lock(&osdc->request_mutex);
1205 if (req->r_linger) {
1206 __unregister_linger_request(osdc, req);
c10ebbf5 1207 req->r_linger = 0;
a40c4f10
YS		 1208 ceph_osdc_put_request(req);
1209 }
1210 mutex_unlock(&osdc->request_mutex);
1211}
1212EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1213
1214void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1215 struct ceph_osd_request *req)
1216{
1217 if (!req->r_linger) {
1218 dout("set_request_linger %p\n", req);
1219 req->r_linger = 1;
1220 /*
1221 * caller is now responsible for calling
1222 * unregister_linger_request
1223 */
1224 ceph_osdc_get_request(req);
1225 }
1226}
1227EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1228
f24e9980
SW		 1229/*
1230 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1231 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1232 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1233 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1234 *
1235 * Return 0 if unchanged, 1 if changed, or negative on error.
1236 *
1237 * Caller should hold map_sem for read and request_mutex.
1238 */
6f6c7006 1239static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1240 struct ceph_osd_request *req, int force_resend)
f24e9980 1241{
5b191d99 1242 struct ceph_pg pgid;
d85b7056
SW		 1243 int acting[CEPH_PG_MAX_SIZE];
1244 int o = -1, num = 0;
f24e9980 1245 int err;
f24e9980 1246
6f6c7006 1247 dout("map_request %p tid %lld\n", req, req->r_tid);
41766f87
AE		 1248 err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
1249 ceph_file_layout_pg_pool(req->r_file_layout));
6f6c7006
SW		 1250 if (err) {
1251 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1252 return err;
6f6c7006 1253 }
7740a42f
SW		 1254 req->r_pgid = pgid;
1255
d85b7056
SW		 1256 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1257 if (err > 0) {
1258 o = acting[0];
1259 num = err;
1260 }
f24e9980 1261
38d6453c
SW		 1262 if ((!force_resend &&
1263 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1264 req->r_sent >= req->r_osd->o_incarnation &&
1265 req->r_num_pg_osds == num &&
1266 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
f24e9980
SW		 1267 (req->r_osd == NULL && o == -1))
1268 return 0; /* no change */
1269
5b191d99
SW		 1270 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1271 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1272 req->r_osd ? req->r_osd->o_osd : -1);
1273
d85b7056
SW		 1274 /* record full pg acting set */
1275 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1276 req->r_num_pg_osds = num;
1277
f24e9980
SW		 1278 if (req->r_osd) {
1279 __cancel_request(req);
1280 list_del_init(&req->r_osd_item);
f24e9980
SW		 1281 req->r_osd = NULL;
1282 }
1283
1284 req->r_osd = __lookup_osd(osdc, o);
1285 if (!req->r_osd && o >= 0) {
c99eb1c7 1286 err = -ENOMEM;
e10006f8 1287 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1288 if (!req->r_osd) {
1289 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1290 goto out;
6f6c7006 1291 }
f24e9980 1292
6f6c7006 1293 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1294 __insert_osd(osdc, req->r_osd);
1295
b7a9e5dd
SW		 1296 ceph_con_open(&req->r_osd->o_con,
1297 CEPH_ENTITY_TYPE_OSD, o,
1298 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1299 }
1300
f5a2041b
YS		 1301 if (req->r_osd) {
1302 __remove_osd_from_lru(req->r_osd);
ad885927
AE		 1303 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1304 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
6f6c7006 1305 } else {
ad885927 1306 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
f5a2041b 1307 }
d85b7056 1308 err = 1; /* osd or pg changed */
f24e9980
SW		 1309
1310out:
f24e9980
SW		 1311 return err;
1312}
1313
1314/*
1315 * caller should hold map_sem (for read) and request_mutex
1316 */
56e925b6
SW		 1317static void __send_request(struct ceph_osd_client *osdc,
1318 struct ceph_osd_request *req)
f24e9980 1319{
1b83bef2 1320 void *p;
f24e9980 1321
1b83bef2
SW		 1322 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1323 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1324 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1325
1326 /* fill in message content that changes each time we send it */
1327 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1328 put_unaligned_le32(req->r_flags, req->r_request_flags);
1329 put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
1330 p = req->r_request_pgid;
1331 ceph_encode_64(&p, req->r_pgid.pool);
1332 ceph_encode_32(&p, req->r_pgid.seed);
1333 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1334 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1335 sizeof(req->r_reassert_version));
2169aea6 1336
3dd72fc0 1337 req->r_stamp = jiffies;
07a27e22 1338 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1339
1340 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808
AE		 1341
1342 /* Mark the request unsafe if this is the first timet's being sent. */
1343
1344 if (!req->r_sent && req->r_unsafe_callback)
1345 req->r_unsafe_callback(req, true);
f24e9980 1346 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1347
1348 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1349}
1350
6f6c7006
SW		 1351/*
1352 * Send any requests in the queue (req_unsent).
1353 */
f9d25199 1354static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1355{
1356 struct ceph_osd_request *req, *tmp;
1357
f9d25199
AE		 1358 dout("__send_queued\n");
1359 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1360 __send_request(osdc, req);
6f6c7006
SW		 1361}
1362
f24e9980
SW		 1363/*
1364 * Timeout callback, called every N seconds when 1 or more osd
1365 * requests has been active for more than N seconds. When this
1366 * happens, we ping all OSDs with requests who have timed out to
1367 * ensure any communications channel reset is detected. Reset the
1368 * request timeouts another N seconds in the future as we go.
1369 * Reschedule the timeout event another N seconds in future (unless
1370 * there are no open requests).
1371 */
1372static void handle_timeout(struct work_struct *work)
1373{
1374 struct ceph_osd_client *osdc =
1375 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1376 struct ceph_osd_request *req;
f24e9980 1377 struct ceph_osd *osd;
422d2cb8 1378 unsigned long keepalive =
3d14c5d2 1379 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1380 struct list_head slow_osds;
f24e9980
SW		 1381 dout("timeout\n");
1382 down_read(&osdc->map_sem);
1383
1384 ceph_monc_request_next_osdmap(&osdc->client->monc);
1385
1386 mutex_lock(&osdc->request_mutex);
f24e9980 1387
422d2cb8
YS		 1388 /*
1389 * ping osds that are a bit slow. this ensures that if there
1390 * is a break in the TCP connection we will notice, and reopen
1391 * a connection with that osd (from the fault callback).
1392 */
1393 INIT_LIST_HEAD(&slow_osds);
1394 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1395 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1396 break;
1397
1398 osd = req->r_osd;
1399 BUG_ON(!osd);
1400 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1401 req->r_tid, osd->o_osd);
422d2cb8
YS		 1402 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1403 }
1404 while (!list_empty(&slow_osds)) {
1405 osd = list_entry(slow_osds.next, struct ceph_osd,
1406 o_keepalive_item);
1407 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1408 ceph_con_keepalive(&osd->o_con);
1409 }
1410
422d2cb8 1411 __schedule_osd_timeout(osdc);
f9d25199 1412 __send_queued(osdc);
f24e9980 1413 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1414 up_read(&osdc->map_sem);
1415}
1416
f5a2041b
YS		 1417static void handle_osds_timeout(struct work_struct *work)
1418{
1419 struct ceph_osd_client *osdc =
1420 container_of(work, struct ceph_osd_client,
1421 osds_timeout_work.work);
1422 unsigned long delay =
3d14c5d2 1423 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1424
1425 dout("osds timeout\n");
1426 down_read(&osdc->map_sem);
aca420bc 1427 remove_old_osds(osdc);
f5a2041b
YS		 1428 up_read(&osdc->map_sem);
1429
1430 schedule_delayed_work(&osdc->osds_timeout_work,
1431 round_jiffies_relative(delay));
1432}
1433
25845472
SW		 1434static void complete_request(struct ceph_osd_request *req)
1435{
26be8808
AE		 1436 if (req->r_unsafe_callback)
1437 req->r_unsafe_callback(req, false);
25845472
SW		 1438 complete_all(&req->r_safe_completion); /* fsync waiter */
1439}
1440
f24e9980
SW		 1441/*
1442 * handle osd op reply. either call the callback if it is specified,
1443 * or do the completion to wake up the waiting thread.
1444 */
350b1c32
SW		 1445static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1446 struct ceph_connection *con)
f24e9980 1447{
1b83bef2 1448 void *p, *end;
f24e9980
SW		 1449 struct ceph_osd_request *req;
1450 u64 tid;
1b83bef2 1451 int object_len;
79528734
AE		 1452 unsigned int numops;
1453 int payload_len, flags;
0ceed5db 1454 s32 result;
1b83bef2
SW		 1455 s32 retry_attempt;
1456 struct ceph_pg pg;
1457 int err;
1458 u32 reassert_epoch;
1459 u64 reassert_version;
1460 u32 osdmap_epoch;
0d5af164 1461 int already_completed;
9fc6e064 1462 u32 bytes;
79528734 1463 unsigned int i;
f24e9980 1464
6df058c0 1465 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1466 dout("handle_reply %p tid %llu\n", msg, tid);
1467
1468 p = msg->front.iov_base;
1469 end = p + msg->front.iov_len;
1470
1471 ceph_decode_need(&p, end, 4, bad);
1472 object_len = ceph_decode_32(&p);
1473 ceph_decode_need(&p, end, object_len, bad);
1474 p += object_len;
1475
ef4859d6 1476 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1477 if (err)
f24e9980 1478 goto bad;
1b83bef2
SW		 1479
1480 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1481 flags = ceph_decode_64(&p);
1482 result = ceph_decode_32(&p);
1483 reassert_epoch = ceph_decode_32(&p);
1484 reassert_version = ceph_decode_64(&p);
1485 osdmap_epoch = ceph_decode_32(&p);
1486
f24e9980
SW		 1487 /* lookup */
1488 mutex_lock(&osdc->request_mutex);
1489 req = __lookup_request(osdc, tid);
1490 if (req == NULL) {
1491 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1492 goto bad_mutex;
f24e9980
SW		 1493 }
1494 ceph_osdc_get_request(req);
1b83bef2
SW		 1495
1496 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1497 req, result);
1498
1499 ceph_decode_need(&p, end, 4, bad);
1500 numops = ceph_decode_32(&p);
1501 if (numops > CEPH_OSD_MAX_OP)
1502 goto bad_put;
1503 if (numops != req->r_num_ops)
1504 goto bad_put;
1505 payload_len = 0;
1506 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad);
1507 for (i = 0; i < numops; i++) {
1508 struct ceph_osd_op *op = p;
1509 int len;
1510
1511 len = le32_to_cpu(op->payload_len);
1512 req->r_reply_op_len[i] = len;
1513 dout(" op %d has %d bytes\n", i, len);
1514 payload_len += len;
1515 p += sizeof(*op);
1516 }
9fc6e064
AE		 1517 bytes = le32_to_cpu(msg->hdr.data_len);
1518 if (payload_len != bytes) {
1b83bef2 1519 pr_warning("sum of op payload lens %d != data_len %d",
9fc6e064 1520 payload_len, bytes);
1b83bef2
SW		 1521 goto bad_put;
1522 }
1523
1524 ceph_decode_need(&p, end, 4 + numops * 4, bad);
1525 retry_attempt = ceph_decode_32(&p);
1526 for (i = 0; i < numops; i++)
1527 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1528
f24e9980 1529 if (!req->r_got_reply) {
f24e9980 1530
1b83bef2 1531 req->r_result = result;
f24e9980
SW		 1532 dout("handle_reply result %d bytes %d\n", req->r_result,
1533 bytes);
1534 if (req->r_result == 0)
1535 req->r_result = bytes;
1536
1537 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1538 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1539 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1540
1541 req->r_got_reply = 1;
1542 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1543 dout("handle_reply tid %llu dup ack\n", tid);
34b43a56 1544 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1545 goto done;
1546 }
1547
1548 dout("handle_reply tid %llu flags %d\n", tid, flags);
1549
a40c4f10
YS		 1550 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1551 __register_linger_request(osdc, req);
1552
f24e9980 1553 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1554 if (result < 0 ||
1555 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1556 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1557 __unregister_request(osdc, req);
1558
0d5af164
AE		 1559 already_completed = req->r_completed;
1560 req->r_completed = 1;
f24e9980 1561 mutex_unlock(&osdc->request_mutex);
0d5af164
AE		 1562 if (already_completed)
1563 goto done;
f24e9980
SW		 1564
1565 if (req->r_callback)
1566 req->r_callback(req, msg);
1567 else
03066f23 1568 complete_all(&req->r_completion);
f24e9980 1569
25845472
SW		 1570 if (flags & CEPH_OSD_FLAG_ONDISK)
1571 complete_request(req);
f24e9980
SW		 1572
1573done:
a40c4f10 1574 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1575 ceph_osdc_put_request(req);
1576 return;
1577
1b83bef2
SW		 1578bad_put:
1579 ceph_osdc_put_request(req);
8058fd45
AE		 1580bad_mutex:
1581 mutex_unlock(&osdc->request_mutex);
f24e9980 1582bad:
1b83bef2
SW		 1583 pr_err("corrupt osd_op_reply got %d %d\n",
1584 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1585 ceph_msg_dump(msg);
f24e9980
SW		 1586}
1587
6f6c7006 1588static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1589{
f24e9980 1590 struct rb_node *p, *n;
f24e9980 1591
6f6c7006
SW		 1592 for (p = rb_first(&osdc->osds); p; p = n) {
1593 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1594
6f6c7006
SW		 1595 n = rb_next(p);
1596 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1597 memcmp(&osd->o_con.peer_addr,
1598 ceph_osd_addr(osdc->osdmap,
1599 osd->o_osd),
1600 sizeof(struct ceph_entity_addr)) != 0)
1601 __reset_osd(osdc, osd);
f24e9980 1602 }
422d2cb8
YS		 1603}
1604
1605/*
6f6c7006
SW		 1606 * Requeue requests whose mapping to an OSD has changed. If requests map to
1607 * no osd, request a new map.
422d2cb8 1608 *
e6d50f67 1609 * Caller should hold map_sem for read.
422d2cb8 1610 */
38d6453c 1611static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
422d2cb8 1612{
a40c4f10 1613 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1614 struct rb_node *p;
1615 int needmap = 0;
1616 int err;
422d2cb8 1617
38d6453c 1618 dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
422d2cb8 1619 mutex_lock(&osdc->request_mutex);
6194ea89 1620 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1621 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1622 p = rb_next(p);
ab60b16d
AE		 1623
1624 /*
1625 * For linger requests that have not yet been
1626 * registered, move them to the linger list; they'll
1627 * be sent to the osd in the loop below. Unregister
1628 * the request before re-registering it as a linger
1629 * request to ensure the __map_request() below
1630 * will decide it needs to be sent.
1631 */
1632 if (req->r_linger && list_empty(&req->r_linger_item)) {
1633 dout("%p tid %llu restart on osd%d\n",
1634 req, req->r_tid,
1635 req->r_osd ? req->r_osd->o_osd : -1);
1636 __unregister_request(osdc, req);
1637 __register_linger_request(osdc, req);
1638 continue;
1639 }
1640
38d6453c 1641 err = __map_request(osdc, req, force_resend);
6f6c7006
SW		 1642 if (err < 0)
1643 continue; /* error */
1644 if (req->r_osd == NULL) {
1645 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1646 needmap++; /* request a newer map */
1647 } else if (err > 0) {
6194ea89
SW		 1648 if (!req->r_linger) {
1649 dout("%p tid %llu requeued on osd%d\n", req,
1650 req->r_tid,
1651 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1652 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1653 }
1654 }
a40c4f10
YS		 1655 }
1656
1657 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1658 r_linger_item) {
1659 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1660
38d6453c 1661 err = __map_request(osdc, req, force_resend);
ab60b16d 1662 dout("__map_request returned %d\n", err);
a40c4f10
YS		 1663 if (err == 0)
1664 continue; /* no change and no osd was specified */
1665 if (err < 0)
1666 continue; /* hrm! */
1667 if (req->r_osd == NULL) {
1668 dout("tid %llu maps to no valid osd\n", req->r_tid);
1669 needmap++; /* request a newer map */
1670 continue;
6f6c7006 1671 }
a40c4f10
YS		 1672
1673 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1674 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1675 __register_request(osdc, req);
c89ce05e 1676 __unregister_linger_request(osdc, req);
6f6c7006 1677 }
14d2f38d 1678 reset_changed_osds(osdc);
f24e9980
SW		 1679 mutex_unlock(&osdc->request_mutex);
1680
1681 if (needmap) {
1682 dout("%d requests for down osds, need new map\n", needmap);
1683 ceph_monc_request_next_osdmap(&osdc->client->monc);
1684 }
422d2cb8 1685}
6f6c7006
SW		 1686
1687
f24e9980
SW		 1688/*
1689 * Process updated osd map.
1690 *
1691 * The message contains any number of incremental and full maps, normally
1692 * indicating some sort of topology change in the cluster. Kick requests
1693 * off to different OSDs as needed.
1694 */
1695void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1696{
1697 void *p, *end, *next;
1698 u32 nr_maps, maplen;
1699 u32 epoch;
1700 struct ceph_osdmap *newmap = NULL, *oldmap;
1701 int err;
1702 struct ceph_fsid fsid;
1703
1704 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1705 p = msg->front.iov_base;
1706 end = p + msg->front.iov_len;
1707
1708 /* verify fsid */
1709 ceph_decode_need(&p, end, sizeof(fsid), bad);
1710 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 1711 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1712 return;
f24e9980
SW		 1713
1714 down_write(&osdc->map_sem);
1715
1716 /* incremental maps */
1717 ceph_decode_32_safe(&p, end, nr_maps, bad);
1718 dout(" %d inc maps\n", nr_maps);
1719 while (nr_maps > 0) {
1720 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 1721 epoch = ceph_decode_32(&p);
1722 maplen = ceph_decode_32(&p);
f24e9980
SW		 1723 ceph_decode_need(&p, end, maplen, bad);
1724 next = p + maplen;
1725 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1726 dout("applying incremental map %u len %d\n",
1727 epoch, maplen);
1728 newmap = osdmap_apply_incremental(&p, next,
1729 osdc->osdmap,
15d9882c 1730 &osdc->client->msgr);
f24e9980
SW		 1731 if (IS_ERR(newmap)) {
1732 err = PTR_ERR(newmap);
1733 goto bad;
1734 }
30dc6381 1735 BUG_ON(!newmap);
f24e9980
SW		 1736 if (newmap != osdc->osdmap) {
1737 ceph_osdmap_destroy(osdc->osdmap);
1738 osdc->osdmap = newmap;
1739 }
38d6453c 1740 kick_requests(osdc, 0);
f24e9980
SW		 1741 } else {
1742 dout("ignoring incremental map %u len %d\n",
1743 epoch, maplen);
1744 }
1745 p = next;
1746 nr_maps--;
1747 }
1748 if (newmap)
1749 goto done;
1750
1751 /* full maps */
1752 ceph_decode_32_safe(&p, end, nr_maps, bad);
1753 dout(" %d full maps\n", nr_maps);
1754 while (nr_maps) {
1755 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 1756 epoch = ceph_decode_32(&p);
1757 maplen = ceph_decode_32(&p);
f24e9980
SW		 1758 ceph_decode_need(&p, end, maplen, bad);
1759 if (nr_maps > 1) {
1760 dout("skipping non-latest full map %u len %d\n",
1761 epoch, maplen);
1762 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1763 dout("skipping full map %u len %d, "
1764 "older than our %u\n", epoch, maplen,
1765 osdc->osdmap->epoch);
1766 } else {
38d6453c
SW		 1767 int skipped_map = 0;
1768
f24e9980
SW		 1769 dout("taking full map %u len %d\n", epoch, maplen);
1770 newmap = osdmap_decode(&p, p+maplen);
1771 if (IS_ERR(newmap)) {
1772 err = PTR_ERR(newmap);
1773 goto bad;
1774 }
30dc6381 1775 BUG_ON(!newmap);
f24e9980
SW		 1776 oldmap = osdc->osdmap;
1777 osdc->osdmap = newmap;
38d6453c
SW		 1778 if (oldmap) {
1779 if (oldmap->epoch + 1 < newmap->epoch)
1780 skipped_map = 1;
f24e9980 1781 ceph_osdmap_destroy(oldmap);
38d6453c
SW		 1782 }
1783 kick_requests(osdc, skipped_map);
f24e9980
SW		 1784 }
1785 p += maplen;
1786 nr_maps--;
1787 }
1788
1789done:
1790 downgrade_write(&osdc->map_sem);
1791 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 1792
1793 /*
1794 * subscribe to subsequent osdmap updates if full to ensure
1795 * we find out when we are no longer full and stop returning
1796 * ENOSPC.
1797 */
1798 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
1799 ceph_monc_request_next_osdmap(&osdc->client->monc);
1800
f9d25199
AE		 1801 mutex_lock(&osdc->request_mutex);
1802 __send_queued(osdc);
1803 mutex_unlock(&osdc->request_mutex);
f24e9980 1804 up_read(&osdc->map_sem);
03066f23 1805 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 1806 return;
1807
1808bad:
1809 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 1810 ceph_msg_dump(msg);
f24e9980
SW		 1811 up_write(&osdc->map_sem);
1812 return;
1813}
1814
a40c4f10
YS		 1815/*
1816 * watch/notify callback event infrastructure
1817 *
1818 * These callbacks are used both for watch and notify operations.
1819 */
1820static void __release_event(struct kref *kref)
1821{
1822 struct ceph_osd_event *event =
1823 container_of(kref, struct ceph_osd_event, kref);
1824
1825 dout("__release_event %p\n", event);
1826 kfree(event);
1827}
1828
1829static void get_event(struct ceph_osd_event *event)
1830{
1831 kref_get(&event->kref);
1832}
1833
1834void ceph_osdc_put_event(struct ceph_osd_event *event)
1835{
1836 kref_put(&event->kref, __release_event);
1837}
1838EXPORT_SYMBOL(ceph_osdc_put_event);
1839
1840static void __insert_event(struct ceph_osd_client *osdc,
1841 struct ceph_osd_event *new)
1842{
1843 struct rb_node **p = &osdc->event_tree.rb_node;
1844 struct rb_node *parent = NULL;
1845 struct ceph_osd_event *event = NULL;
1846
1847 while (*p) {
1848 parent = *p;
1849 event = rb_entry(parent, struct ceph_osd_event, node);
1850 if (new->cookie < event->cookie)
1851 p = &(*p)->rb_left;
1852 else if (new->cookie > event->cookie)
1853 p = &(*p)->rb_right;
1854 else
1855 BUG();
1856 }
1857
1858 rb_link_node(&new->node, parent, p);
1859 rb_insert_color(&new->node, &osdc->event_tree);
1860}
1861
1862static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
1863 u64 cookie)
1864{
1865 struct rb_node **p = &osdc->event_tree.rb_node;
1866 struct rb_node *parent = NULL;
1867 struct ceph_osd_event *event = NULL;
1868
1869 while (*p) {
1870 parent = *p;
1871 event = rb_entry(parent, struct ceph_osd_event, node);
1872 if (cookie < event->cookie)
1873 p = &(*p)->rb_left;
1874 else if (cookie > event->cookie)
1875 p = &(*p)->rb_right;
1876 else
1877 return event;
1878 }
1879 return NULL;
1880}
1881
1882static void __remove_event(struct ceph_osd_event *event)
1883{
1884 struct ceph_osd_client *osdc = event->osdc;
1885
1886 if (!RB_EMPTY_NODE(&event->node)) {
1887 dout("__remove_event removed %p\n", event);
1888 rb_erase(&event->node, &osdc->event_tree);
1889 ceph_osdc_put_event(event);
1890 } else {
1891 dout("__remove_event didn't remove %p\n", event);
1892 }
1893}
1894
1895int ceph_osdc_create_event(struct ceph_osd_client *osdc,
1896 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 1897 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 1898{
1899 struct ceph_osd_event *event;
1900
1901 event = kmalloc(sizeof(*event), GFP_NOIO);
1902 if (!event)
1903 return -ENOMEM;
1904
1905 dout("create_event %p\n", event);
1906 event->cb = event_cb;
3c663bbd 1907 event->one_shot = 0;
a40c4f10
YS		 1908 event->data = data;
1909 event->osdc = osdc;
1910 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 1911 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 1912 kref_init(&event->kref); /* one ref for us */
1913 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 1914
1915 spin_lock(&osdc->event_lock);
1916 event->cookie = ++osdc->event_count;
1917 __insert_event(osdc, event);
1918 spin_unlock(&osdc->event_lock);
1919
1920 *pevent = event;
1921 return 0;
1922}
1923EXPORT_SYMBOL(ceph_osdc_create_event);
1924
1925void ceph_osdc_cancel_event(struct ceph_osd_event *event)
1926{
1927 struct ceph_osd_client *osdc = event->osdc;
1928
1929 dout("cancel_event %p\n", event);
1930 spin_lock(&osdc->event_lock);
1931 __remove_event(event);
1932 spin_unlock(&osdc->event_lock);
1933 ceph_osdc_put_event(event); /* caller's */
1934}
1935EXPORT_SYMBOL(ceph_osdc_cancel_event);
1936
1937
1938static void do_event_work(struct work_struct *work)
1939{
1940 struct ceph_osd_event_work *event_work =
1941 container_of(work, struct ceph_osd_event_work, work);
1942 struct ceph_osd_event *event = event_work->event;
1943 u64 ver = event_work->ver;
1944 u64 notify_id = event_work->notify_id;
1945 u8 opcode = event_work->opcode;
1946
1947 dout("do_event_work completing %p\n", event);
1948 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 1949 dout("do_event_work completed %p\n", event);
1950 ceph_osdc_put_event(event);
1951 kfree(event_work);
1952}
1953
1954
1955/*
1956 * Process osd watch notifications
1957 */
3c663bbd
AE		 1958static void handle_watch_notify(struct ceph_osd_client *osdc,
1959 struct ceph_msg *msg)
a40c4f10
YS		 1960{
1961 void *p, *end;
1962 u8 proto_ver;
1963 u64 cookie, ver, notify_id;
1964 u8 opcode;
1965 struct ceph_osd_event *event;
1966 struct ceph_osd_event_work *event_work;
1967
1968 p = msg->front.iov_base;
1969 end = p + msg->front.iov_len;
1970
1971 ceph_decode_8_safe(&p, end, proto_ver, bad);
1972 ceph_decode_8_safe(&p, end, opcode, bad);
1973 ceph_decode_64_safe(&p, end, cookie, bad);
1974 ceph_decode_64_safe(&p, end, ver, bad);
1975 ceph_decode_64_safe(&p, end, notify_id, bad);
1976
1977 spin_lock(&osdc->event_lock);
1978 event = __find_event(osdc, cookie);
1979 if (event) {
3c663bbd 1980 BUG_ON(event->one_shot);
a40c4f10 1981 get_event(event);
a40c4f10
YS		 1982 }
1983 spin_unlock(&osdc->event_lock);
1984 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
1985 cookie, ver, event);
1986 if (event) {
1987 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10
YS		 1988 if (!event_work) {
1989 dout("ERROR: could not allocate event_work\n");
1990 goto done_err;
1991 }
6b0ae409 1992 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 1993 event_work->event = event;
1994 event_work->ver = ver;
1995 event_work->notify_id = notify_id;
1996 event_work->opcode = opcode;
1997 if (!queue_work(osdc->notify_wq, &event_work->work)) {
1998 dout("WARNING: failed to queue notify event work\n");
1999 goto done_err;
2000 }
2001 }
2002
2003 return;
2004
2005done_err:
a40c4f10
YS		 2006 ceph_osdc_put_event(event);
2007 return;
2008
2009bad:
2010 pr_err("osdc handle_watch_notify corrupt msg\n");
2011 return;
2012}
2013
e65550fd
AE		 2014/*
2015 * build new request AND message
2016 *
2017 */
2018void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2019 struct ceph_snap_context *snapc, u64 snap_id,
2020 struct timespec *mtime)
2021{
2022 struct ceph_msg *msg = req->r_request;
2023 void *p;
2024 size_t msg_size;
2025 int flags = req->r_flags;
2026 u64 data_len;
2027 unsigned int i;
2028
2029 req->r_snapid = snap_id;
2030 req->r_snapc = ceph_get_snap_context(snapc);
2031
2032 /* encode request */
2033 msg->hdr.version = cpu_to_le16(4);
2034
2035 p = msg->front.iov_base;
2036 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2037 req->r_request_osdmap_epoch = p;
2038 p += 4;
2039 req->r_request_flags = p;
2040 p += 4;
2041 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2042 ceph_encode_timespec(p, mtime);
2043 p += sizeof(struct ceph_timespec);
2044 req->r_request_reassert_version = p;
2045 p += sizeof(struct ceph_eversion); /* will get filled in */
2046
2047 /* oloc */
2048 ceph_encode_8(&p, 4);
2049 ceph_encode_8(&p, 4);
2050 ceph_encode_32(&p, 8 + 4 + 4);
2051 req->r_request_pool = p;
2052 p += 8;
2053 ceph_encode_32(&p, -1); /* preferred */
2054 ceph_encode_32(&p, 0); /* key len */
2055
2056 ceph_encode_8(&p, 1);
2057 req->r_request_pgid = p;
2058 p += 8 + 4;
2059 ceph_encode_32(&p, -1); /* preferred */
2060
2061 /* oid */
2062 ceph_encode_32(&p, req->r_oid_len);
2063 memcpy(p, req->r_oid, req->r_oid_len);
2064 dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
2065 p += req->r_oid_len;
2066
2067 /* ops--can imply data */
2068 ceph_encode_16(&p, (u16)req->r_num_ops);
2069 data_len = 0;
2070 for (i = 0; i < req->r_num_ops; i++) {
2071 data_len += osd_req_encode_op(req, p, i);
2072 p += sizeof(struct ceph_osd_op);
2073 }
2074
2075 /* snaps */
2076 ceph_encode_64(&p, req->r_snapid);
2077 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2078 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2079 if (req->r_snapc) {
2080 for (i = 0; i < snapc->num_snaps; i++) {
2081 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2082 }
2083 }
2084
2085 req->r_request_attempts = p;
2086 p += 4;
2087
2088 /* data */
2089 if (flags & CEPH_OSD_FLAG_WRITE) {
2090 u16 data_off;
2091
2092 /*
2093 * The header "data_off" is a hint to the receiver
2094 * allowing it to align received data into its
2095 * buffers such that there's no need to re-copy
2096 * it before writing it to disk (direct I/O).
2097 */
2098 data_off = (u16) (off & 0xffff);
2099 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2100 }
2101 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2102
2103 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2104 msg_size = p - msg->front.iov_base;
2105 msg->front.iov_len = msg_size;
2106 msg->hdr.front_len = cpu_to_le32(msg_size);
2107
2108 dout("build_request msg_size was %d\n", (int)msg_size);
2109}
2110EXPORT_SYMBOL(ceph_osdc_build_request);
2111
70636773
AE		 2112/*
2113 * Register request, send initial attempt.
2114 */
2115int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2116 struct ceph_osd_request *req,
2117 bool nofail)
2118{
2119 int rc = 0;
2120
f24e9980
SW		 2121 down_read(&osdc->map_sem);
2122 mutex_lock(&osdc->request_mutex);
dc4b870c 2123 __register_request(osdc, req);
c10ebbf5
AE		 2124 req->r_sent = 0;
2125 req->r_got_reply = 0;
2126 req->r_completed = 0;
92451b49
AE		 2127 rc = __map_request(osdc, req, 0);
2128 if (rc < 0) {
2129 if (nofail) {
2130 dout("osdc_start_request failed map, "
2131 " will retry %lld\n", req->r_tid);
2132 rc = 0;
f24e9980 2133 }
92451b49 2134 goto out_unlock;
f24e9980 2135 }
92451b49
AE		 2136 if (req->r_osd == NULL) {
2137 dout("send_request %p no up osds in pg\n", req);
2138 ceph_monc_request_next_osdmap(&osdc->client->monc);
2139 } else {
7e2766a1 2140 __send_queued(osdc);
92451b49
AE		 2141 }
2142 rc = 0;
234af26f 2143out_unlock:
f24e9980
SW		 2144 mutex_unlock(&osdc->request_mutex);
2145 up_read(&osdc->map_sem);
2146 return rc;
2147}
3d14c5d2 2148EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980
SW		 2149
2150/*
2151 * wait for a request to complete
2152 */
2153int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2154 struct ceph_osd_request *req)
2155{
2156 int rc;
2157
2158 rc = wait_for_completion_interruptible(&req->r_completion);
2159 if (rc < 0) {
2160 mutex_lock(&osdc->request_mutex);
2161 __cancel_request(req);
529cfcc4 2162 __unregister_request(osdc, req);
f24e9980 2163 mutex_unlock(&osdc->request_mutex);
25845472 2164 complete_request(req);
529cfcc4 2165 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
f24e9980
SW		 2166 return rc;
2167 }
2168
2169 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2170 return req->r_result;
2171}
3d14c5d2 2172EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2173
2174/*
2175 * sync - wait for all in-flight requests to flush. avoid starvation.
2176 */
2177void ceph_osdc_sync(struct ceph_osd_client *osdc)
2178{
2179 struct ceph_osd_request *req;
2180 u64 last_tid, next_tid = 0;
2181
2182 mutex_lock(&osdc->request_mutex);
2183 last_tid = osdc->last_tid;
2184 while (1) {
2185 req = __lookup_request_ge(osdc, next_tid);
2186 if (!req)
2187 break;
2188 if (req->r_tid > last_tid)
2189 break;
2190
2191 next_tid = req->r_tid + 1;
2192 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2193 continue;
2194
2195 ceph_osdc_get_request(req);
2196 mutex_unlock(&osdc->request_mutex);
2197 dout("sync waiting on tid %llu (last is %llu)\n",
2198 req->r_tid, last_tid);
2199 wait_for_completion(&req->r_safe_completion);
2200 mutex_lock(&osdc->request_mutex);
2201 ceph_osdc_put_request(req);
2202 }
2203 mutex_unlock(&osdc->request_mutex);
2204 dout("sync done (thru tid %llu)\n", last_tid);
2205}
3d14c5d2 2206EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980
SW		 2207
2208/*
2209 * init, shutdown
2210 */
2211int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2212{
2213 int err;
2214
2215 dout("init\n");
2216 osdc->client = client;
2217 osdc->osdmap = NULL;
2218 init_rwsem(&osdc->map_sem);
2219 init_completion(&osdc->map_waiters);
2220 osdc->last_requested_map = 0;
2221 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2222 osdc->last_tid = 0;
2223 osdc->osds = RB_ROOT;
f5a2041b 2224 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2225 osdc->requests = RB_ROOT;
422d2cb8 2226 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2227 INIT_LIST_HEAD(&osdc->req_unsent);
2228 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2229 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2230 osdc->num_requests = 0;
2231 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2232 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2233 spin_lock_init(&osdc->event_lock);
2234 osdc->event_tree = RB_ROOT;
2235 osdc->event_count = 0;
f5a2041b
YS		 2236
2237 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2238 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2239
5f44f142 2240 err = -ENOMEM;
f24e9980
SW		 2241 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2242 sizeof(struct ceph_osd_request));
2243 if (!osdc->req_mempool)
5f44f142 2244 goto out;
f24e9980 2245
d50b409f
SW		 2246 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2247 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2248 "osd_op");
f24e9980 2249 if (err < 0)
5f44f142 2250 goto out_mempool;
d50b409f 2251 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2252 OSD_OPREPLY_FRONT_LEN, 10, true,
2253 "osd_op_reply");
c16e7869
SW		 2254 if (err < 0)
2255 goto out_msgpool;
a40c4f10
YS		 2256
2257 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2258 if (IS_ERR(osdc->notify_wq)) {
2259 err = PTR_ERR(osdc->notify_wq);
2260 osdc->notify_wq = NULL;
2261 goto out_msgpool;
2262 }
f24e9980 2263 return 0;
5f44f142 2264
c16e7869
SW		 2265out_msgpool:
2266 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2267out_mempool:
2268 mempool_destroy(osdc->req_mempool);
2269out:
2270 return err;
f24e9980
SW		 2271}
2272
2273void ceph_osdc_stop(struct ceph_osd_client *osdc)
2274{
a40c4f10
YS		 2275 flush_workqueue(osdc->notify_wq);
2276 destroy_workqueue(osdc->notify_wq);
f24e9980 2277 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2278 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2279 if (osdc->osdmap) {
2280 ceph_osdmap_destroy(osdc->osdmap);
2281 osdc->osdmap = NULL;
2282 }
aca420bc 2283 remove_all_osds(osdc);
f24e9980
SW		 2284 mempool_destroy(osdc->req_mempool);
2285 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2286 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2287}
2288
2289/*
2290 * Read some contiguous pages. If we cross a stripe boundary, shorten
2291 * *plen. Return number of bytes read, or error.
2292 */
2293int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2294 struct ceph_vino vino, struct ceph_file_layout *layout,
2295 u64 off, u64 *plen,
2296 u32 truncate_seq, u64 truncate_size,
b7495fc2 2297 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2298{
2299 struct ceph_osd_request *req;
2300 int rc = 0;
2301
2302 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2303 vino.snap, off, *plen);
79528734 2304 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
f24e9980 2305 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2306 NULL, truncate_seq, truncate_size,
153e5167 2307 false);
6816282d
SW		 2308 if (IS_ERR(req))
2309 return PTR_ERR(req);
f24e9980
SW		 2310
2311 /* it may be a short read due to an object boundary */
0fff87ec 2312
406e2c9f 2313 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2314 pages, *plen, page_align, false, false);
f24e9980 2315
e0c59487 2316 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2317 off, *plen, *plen, page_align);
f24e9980 2318
79528734 2319 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2320
f24e9980
SW		 2321 rc = ceph_osdc_start_request(osdc, req, false);
2322 if (!rc)
2323 rc = ceph_osdc_wait_request(osdc, req);
2324
2325 ceph_osdc_put_request(req);
2326 dout("readpages result %d\n", rc);
2327 return rc;
2328}
3d14c5d2 2329EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2330
2331/*
2332 * do a synchronous write on N pages
2333 */
2334int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2335 struct ceph_file_layout *layout,
2336 struct ceph_snap_context *snapc,
2337 u64 off, u64 len,
2338 u32 truncate_seq, u64 truncate_size,
2339 struct timespec *mtime,
24808826 2340 struct page **pages, int num_pages)
f24e9980
SW		 2341{
2342 struct ceph_osd_request *req;
2343 int rc = 0;
b7495fc2 2344 int page_align = off & ~PAGE_MASK;
f24e9980 2345
acead002 2346 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
79528734 2347 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
f24e9980 2348 CEPH_OSD_OP_WRITE,
24808826 2349 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2350 snapc, truncate_seq, truncate_size,
153e5167 2351 true);
6816282d
SW		 2352 if (IS_ERR(req))
2353 return PTR_ERR(req);
f24e9980
SW		 2354
2355 /* it may be a short write due to an object boundary */
406e2c9f 2356 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2357 false, false);
2358 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2359
79528734 2360 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2361
87f979d3 2362 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2363 if (!rc)
2364 rc = ceph_osdc_wait_request(osdc, req);
2365
2366 ceph_osdc_put_request(req);
2367 if (rc == 0)
2368 rc = len;
2369 dout("writepages result %d\n", rc);
2370 return rc;
2371}
3d14c5d2 2372EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2373
5522ae0b
AE		 2374int ceph_osdc_setup(void)
2375{
2376 BUG_ON(ceph_osd_request_cache);
2377 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2378 sizeof (struct ceph_osd_request),
2379 __alignof__(struct ceph_osd_request),
2380 0, NULL);
2381
2382 return ceph_osd_request_cache ? 0 : -ENOMEM;
2383}
2384EXPORT_SYMBOL(ceph_osdc_setup);
2385
2386void ceph_osdc_cleanup(void)
2387{
2388 BUG_ON(!ceph_osd_request_cache);
2389 kmem_cache_destroy(ceph_osd_request_cache);
2390 ceph_osd_request_cache = NULL;
2391}
2392EXPORT_SYMBOL(ceph_osdc_cleanup);
2393
f24e9980
SW		 2394/*
2395 * handle incoming message
2396 */
2397static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2398{
2399 struct ceph_osd *osd = con->private;
32c895e7 2400 struct ceph_osd_client *osdc;
f24e9980
SW		 2401 int type = le16_to_cpu(msg->hdr.type);
2402
2403 if (!osd)
4a32f93d 2404 goto out;
32c895e7 2405 osdc = osd->o_osdc;
f24e9980
SW		 2406
2407 switch (type) {
2408 case CEPH_MSG_OSD_MAP:
2409 ceph_osdc_handle_map(osdc, msg);
2410 break;
2411 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2412 handle_reply(osdc, msg, con);
f24e9980 2413 break;
a40c4f10
YS		 2414 case CEPH_MSG_WATCH_NOTIFY:
2415 handle_watch_notify(osdc, msg);
2416 break;
f24e9980
SW		 2417
2418 default:
2419 pr_err("received unknown message type %d %s\n", type,
2420 ceph_msg_type_name(type));
2421 }
4a32f93d 2422out:
f24e9980
SW		 2423 ceph_msg_put(msg);
2424}
2425
5b3a4db3 2426/*
21b667f6
SW		 2427 * lookup and return message for incoming reply. set up reply message
2428 * pages.
5b3a4db3
SW		 2429 */
2430static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2431 struct ceph_msg_header *hdr,
2432 int *skip)
f24e9980
SW		 2433{
2434 struct ceph_osd *osd = con->private;
2435 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2436 struct ceph_msg *m;
0547a9b3 2437 struct ceph_osd_request *req;
5b3a4db3
SW		 2438 int front = le32_to_cpu(hdr->front_len);
2439 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2440 u64 tid;
f24e9980 2441
0547a9b3
YS		 2442 tid = le64_to_cpu(hdr->tid);
2443 mutex_lock(&osdc->request_mutex);
2444 req = __lookup_request(osdc, tid);
2445 if (!req) {
2446 *skip = 1;
2447 m = NULL;
756a16a5
SW		 2448 dout("get_reply unknown tid %llu from osd%d\n", tid,
2449 osd->o_osd);
0547a9b3
YS		 2450 goto out;
2451 }
c16e7869 2452
ace6d3a9 2453 if (req->r_reply->con)
8921d114 2454 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2455 req->r_reply, req->r_reply->con);
2456 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2457
c16e7869
SW		 2458 if (front > req->r_reply->front.iov_len) {
2459 pr_warning("get_reply front %d > preallocated %d\n",
2460 front, (int)req->r_reply->front.iov_len);
b61c2763 2461 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
a79832f2 2462 if (!m)
c16e7869
SW		 2463 goto out;
2464 ceph_msg_put(req->r_reply);
2465 req->r_reply = m;
2466 }
2467 m = ceph_msg_get(req->r_reply);
2468
0547a9b3 2469 if (data_len > 0) {
a4ce40a9 2470 struct ceph_osd_data *osd_data;
0fff87ec 2471
a4ce40a9
AE		 2472 /*
2473 * XXX This is assuming there is only one op containing
2474 * XXX page data. Probably OK for reads, but this
2475 * XXX ought to be done more generally.
2476 */
406e2c9f 2477 osd_data = osd_req_op_extent_osd_data(req, 0);
0fff87ec 2478 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2479 if (osd_data->pages &&
e0c59487 2480 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2481
e0c59487
AE		 2482 pr_warning("tid %lld reply has %d bytes "
2483 "we had only %llu bytes ready\n",
2484 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2485 *skip = 1;
2486 ceph_msg_put(m);
2487 m = NULL;
2488 goto out;
2489 }
2ac2b7a6 2490 }
0547a9b3 2491 }
5b3a4db3 2492 *skip = 0;
c16e7869 2493 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2494
2495out:
2496 mutex_unlock(&osdc->request_mutex);
2450418c 2497 return m;
5b3a4db3
SW		 2498
2499}
2500
2501static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2502 struct ceph_msg_header *hdr,
2503 int *skip)
2504{
2505 struct ceph_osd *osd = con->private;
2506 int type = le16_to_cpu(hdr->type);
2507 int front = le32_to_cpu(hdr->front_len);
2508
1c20f2d2 2509 *skip = 0;
5b3a4db3
SW		 2510 switch (type) {
2511 case CEPH_MSG_OSD_MAP:
a40c4f10 2512 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2513 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2514 case CEPH_MSG_OSD_OPREPLY:
2515 return get_reply(con, hdr, skip);
2516 default:
2517 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2518 osd->o_osd);
2519 *skip = 1;
2520 return NULL;
2521 }
f24e9980
SW		 2522}
2523
2524/*
2525 * Wrappers to refcount containing ceph_osd struct
2526 */
2527static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2528{
2529 struct ceph_osd *osd = con->private;
2530 if (get_osd(osd))
2531 return con;
2532 return NULL;
2533}
2534
2535static void put_osd_con(struct ceph_connection *con)
2536{
2537 struct ceph_osd *osd = con->private;
2538 put_osd(osd);
2539}
2540
4e7a5dcd
SW		 2541/*
2542 * authentication
2543 */
a3530df3
AE		 2544/*
2545 * Note: returned pointer is the address of a structure that's
2546 * managed separately. Caller must *not* attempt to free it.
2547 */
2548static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2549 int *proto, int force_new)
4e7a5dcd
SW		 2550{
2551 struct ceph_osd *o = con->private;
2552 struct ceph_osd_client *osdc = o->o_osdc;
2553 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2554 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2555
74f1869f 2556 if (force_new && auth->authorizer) {
27859f97 2557 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2558 auth->authorizer = NULL;
2559 }
27859f97
SW		 2560 if (!auth->authorizer) {
2561 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2562 auth);
4e7a5dcd 2563 if (ret)
a3530df3 2564 return ERR_PTR(ret);
27859f97
SW		 2565 } else {
2566 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2567 auth);
2568 if (ret)
2569 return ERR_PTR(ret);
4e7a5dcd 2570 }
4e7a5dcd 2571 *proto = ac->protocol;
74f1869f 2572
a3530df3 2573 return auth;
4e7a5dcd
SW		 2574}
2575
2576
2577static int verify_authorizer_reply(struct ceph_connection *con, int len)
2578{
2579 struct ceph_osd *o = con->private;
2580 struct ceph_osd_client *osdc = o->o_osdc;
2581 struct ceph_auth_client *ac = osdc->client->monc.auth;
2582
27859f97 2583 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2584}
2585
9bd2e6f8
SW		 2586static int invalidate_authorizer(struct ceph_connection *con)
2587{
2588 struct ceph_osd *o = con->private;
2589 struct ceph_osd_client *osdc = o->o_osdc;
2590 struct ceph_auth_client *ac = osdc->client->monc.auth;
2591
27859f97 2592 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2593 return ceph_monc_validate_auth(&osdc->client->monc);
2594}
4e7a5dcd 2595
9e32789f 2596static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2597 .get = get_osd_con,
2598 .put = put_osd_con,
2599 .dispatch = dispatch,
4e7a5dcd
SW		 2600 .get_authorizer = get_authorizer,
2601 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2602 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2603 .alloc_msg = alloc_msg,
81b024e7 2604 .fault = osd_reset,
f24e9980 2605};
Linux 6.x block layer and io_uring tree(s)