projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
libceph: change from BUG to WARN for __remove_osd() asserts
[GitHub/mt8127/android_kernel_alcatel_ttab.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;
1f69fb06
YZ		 736 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
737 if (truncate_size <= object_base) {
738 truncate_size = 0;
739 } else {
740 truncate_size -= object_base;
741 if (truncate_size > object_size)
742 truncate_size = object_size;
743 }
a19dadfb 744 }
d18d1e28 745
c99d2d4a 746 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
b0270324 747 truncate_size, truncate_seq);
8c042b0d 748
acead002
AE		 749 /*
750 * A second op in the ops array means the caller wants to
751 * also issue a include a 'startsync' command so that the
752 * osd will flush data quickly.
753 */
754 if (num_ops > 1)
c99d2d4a 755 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
d18d1e28 756
3499e8a5
YS		 757 req->r_file_layout = *layout; /* keep a copy */
758
75d1c941
AE		 759 snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
760 vino.ino, objnum);
dbe0fc41
AE		 761 req->r_oid_len = strlen(req->r_oid);
762
f24e9980
SW		 763 return req;
764}
3d14c5d2 765EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 766
767/*
768 * We keep osd requests in an rbtree, sorted by ->r_tid.
769 */
770static void __insert_request(struct ceph_osd_client *osdc,
771 struct ceph_osd_request *new)
772{
773 struct rb_node **p = &osdc->requests.rb_node;
774 struct rb_node *parent = NULL;
775 struct ceph_osd_request *req = NULL;
776
777 while (*p) {
778 parent = *p;
779 req = rb_entry(parent, struct ceph_osd_request, r_node);
780 if (new->r_tid < req->r_tid)
781 p = &(*p)->rb_left;
782 else if (new->r_tid > req->r_tid)
783 p = &(*p)->rb_right;
784 else
785 BUG();
786 }
787
788 rb_link_node(&new->r_node, parent, p);
789 rb_insert_color(&new->r_node, &osdc->requests);
790}
791
792static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
793 u64 tid)
794{
795 struct ceph_osd_request *req;
796 struct rb_node *n = osdc->requests.rb_node;
797
798 while (n) {
799 req = rb_entry(n, struct ceph_osd_request, r_node);
800 if (tid < req->r_tid)
801 n = n->rb_left;
802 else if (tid > req->r_tid)
803 n = n->rb_right;
804 else
805 return req;
806 }
807 return NULL;
808}
809
810static struct ceph_osd_request *
811__lookup_request_ge(struct ceph_osd_client *osdc,
812 u64 tid)
813{
814 struct ceph_osd_request *req;
815 struct rb_node *n = osdc->requests.rb_node;
816
817 while (n) {
818 req = rb_entry(n, struct ceph_osd_request, r_node);
819 if (tid < req->r_tid) {
820 if (!n->rb_left)
821 return req;
822 n = n->rb_left;
823 } else if (tid > req->r_tid) {
824 n = n->rb_right;
825 } else {
826 return req;
827 }
828 }
829 return NULL;
830}
831
6f6c7006
SW		 832/*
833 * Resubmit requests pending on the given osd.
834 */
835static void __kick_osd_requests(struct ceph_osd_client *osdc,
836 struct ceph_osd *osd)
837{
a40c4f10 838 struct ceph_osd_request *req, *nreq;
e02493c0 839 LIST_HEAD(resend);
6f6c7006
SW		 840 int err;
841
842 dout("__kick_osd_requests osd%d\n", osd->o_osd);
843 err = __reset_osd(osdc, osd);
685a7555 844 if (err)
6f6c7006 845 return;
e02493c0
AE		 846 /*
847 * Build up a list of requests to resend by traversing the
848 * osd's list of requests. Requests for a given object are
849 * sent in tid order, and that is also the order they're
850 * kept on this list. Therefore all requests that are in
851 * flight will be found first, followed by all requests that
852 * have not yet been sent. And to resend requests while
853 * preserving this order we will want to put any sent
854 * requests back on the front of the osd client's unsent
855 * list.
856 *
857 * So we build a separate ordered list of already-sent
858 * requests for the affected osd and splice it onto the
859 * front of the osd client's unsent list. Once we've seen a
860 * request that has not yet been sent we're done. Those
861 * requests are already sitting right where they belong.
862 */
6f6c7006 863 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 864 if (!req->r_sent)
865 break;
866 list_move_tail(&req->r_req_lru_item, &resend);
867 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
6f6c7006 868 osd->o_osd);
a40c4f10
YS		 869 if (!req->r_linger)
870 req->r_flags |= CEPH_OSD_FLAG_RETRY;
871 }
e02493c0 872 list_splice(&resend, &osdc->req_unsent);
a40c4f10 873
e02493c0
AE		 874 /*
875 * Linger requests are re-registered before sending, which
876 * sets up a new tid for each. We add them to the unsent
877 * list at the end to keep things in tid order.
878 */
a40c4f10
YS		 879 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
880 r_linger_osd) {
77f38e0e
SW		 881 /*
882 * reregister request prior to unregistering linger so
883 * that r_osd is preserved.
884 */
885 BUG_ON(!list_empty(&req->r_req_lru_item));
a40c4f10 886 __register_request(osdc, req);
e02493c0 887 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
ad885927 888 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
77f38e0e 889 __unregister_linger_request(osdc, req);
a40c4f10
YS		 890 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
891 osd->o_osd);
6f6c7006
SW		 892 }
893}
894
f24e9980 895/*
81b024e7 896 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 897 */
898static void osd_reset(struct ceph_connection *con)
899{
900 struct ceph_osd *osd = con->private;
901 struct ceph_osd_client *osdc;
902
903 if (!osd)
904 return;
905 dout("osd_reset osd%d\n", osd->o_osd);
906 osdc = osd->o_osdc;
f24e9980 907 down_read(&osdc->map_sem);
83aff95e
SW		 908 mutex_lock(&osdc->request_mutex);
909 __kick_osd_requests(osdc, osd);
f9d25199 910 __send_queued(osdc);
83aff95e 911 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 912 up_read(&osdc->map_sem);
913}
914
915/*
916 * Track open sessions with osds.
917 */
e10006f8 918static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 919{
920 struct ceph_osd *osd;
921
922 osd = kzalloc(sizeof(*osd), GFP_NOFS);
923 if (!osd)
924 return NULL;
925
926 atomic_set(&osd->o_ref, 1);
927 osd->o_osdc = osdc;
e10006f8 928 osd->o_osd = onum;
f407731d 929 RB_CLEAR_NODE(&osd->o_node);
f24e9980 930 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 931 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 932 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 933 osd->o_incarnation = 1;
934
b7a9e5dd 935 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 936
422d2cb8 937 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 938 return osd;
939}
940
941static struct ceph_osd *get_osd(struct ceph_osd *osd)
942{
943 if (atomic_inc_not_zero(&osd->o_ref)) {
944 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
945 atomic_read(&osd->o_ref));
946 return osd;
947 } else {
948 dout("get_osd %p FAIL\n", osd);
949 return NULL;
950 }
951}
952
953static void put_osd(struct ceph_osd *osd)
954{
955 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
956 atomic_read(&osd->o_ref) - 1);
a255651d 957 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
79494d1b
SW		 958 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
959
27859f97 960 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 961 kfree(osd);
79494d1b 962 }
f24e9980
SW		 963}
964
965/*
966 * remove an osd from our map
967 */
f5a2041b 968static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 969{
f5a2041b 970 dout("__remove_osd %p\n", osd);
54ff4c89
ID		 971 WARN_ON(!list_empty(&osd->o_requests));
972 WARN_ON(!list_empty(&osd->o_linger_requests));
5d3c6d27 973
f24e9980 974 rb_erase(&osd->o_node, &osdc->osds);
f5a2041b 975 list_del_init(&osd->o_osd_lru);
f24e9980
SW		 976 ceph_con_close(&osd->o_con);
977 put_osd(osd);
978}
979
aca420bc
SW		 980static void remove_all_osds(struct ceph_osd_client *osdc)
981{
048a9d2d 982 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 983 mutex_lock(&osdc->request_mutex);
984 while (!RB_EMPTY_ROOT(&osdc->osds)) {
985 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
986 struct ceph_osd, o_node);
987 __remove_osd(osdc, osd);
988 }
989 mutex_unlock(&osdc->request_mutex);
990}
991
f5a2041b
YS		 992static void __move_osd_to_lru(struct ceph_osd_client *osdc,
993 struct ceph_osd *osd)
994{
995 dout("__move_osd_to_lru %p\n", osd);
996 BUG_ON(!list_empty(&osd->o_osd_lru));
997 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
3d14c5d2 998 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
f5a2041b
YS		 999}
1000
1001static void __remove_osd_from_lru(struct ceph_osd *osd)
1002{
1003 dout("__remove_osd_from_lru %p\n", osd);
1004 if (!list_empty(&osd->o_osd_lru))
1005 list_del_init(&osd->o_osd_lru);
1006}
1007
aca420bc 1008static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1009{
1010 struct ceph_osd *osd, *nosd;
1011
1012 dout("__remove_old_osds %p\n", osdc);
1013 mutex_lock(&osdc->request_mutex);
1014 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1015 if (time_before(jiffies, osd->lru_ttl))
f5a2041b
YS		 1016 break;
1017 __remove_osd(osdc, osd);
1018 }
1019 mutex_unlock(&osdc->request_mutex);
1020}
1021
f24e9980
SW		 1022/*
1023 * reset osd connect
1024 */
f5a2041b 1025static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1026{
c3acb181 1027 struct ceph_entity_addr *peer_addr;
f24e9980 1028
f5a2041b 1029 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1030 if (list_empty(&osd->o_requests) &&
1031 list_empty(&osd->o_linger_requests)) {
f5a2041b 1032 __remove_osd(osdc, osd);
c3acb181
AE		 1033
1034 return -ENODEV;
1035 }
1036
1037 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1038 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1039 !ceph_con_opened(&osd->o_con)) {
1040 struct ceph_osd_request *req;
1041
87b315a5
SW		 1042 dout(" osd addr hasn't changed and connection never opened,"
1043 " letting msgr retry");
1044 /* touch each r_stamp for handle_timeout()'s benfit */
1045 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1046 req->r_stamp = jiffies;
c3acb181
AE		 1047
1048 return -EAGAIN;
f24e9980 1049 }
c3acb181
AE		 1050
1051 ceph_con_close(&osd->o_con);
1052 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1053 osd->o_incarnation++;
1054
1055 return 0;
f24e9980
SW		 1056}
1057
1058static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1059{
1060 struct rb_node **p = &osdc->osds.rb_node;
1061 struct rb_node *parent = NULL;
1062 struct ceph_osd *osd = NULL;
1063
aca420bc 1064 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1065 while (*p) {
1066 parent = *p;
1067 osd = rb_entry(parent, struct ceph_osd, o_node);
1068 if (new->o_osd < osd->o_osd)
1069 p = &(*p)->rb_left;
1070 else if (new->o_osd > osd->o_osd)
1071 p = &(*p)->rb_right;
1072 else
1073 BUG();
1074 }
1075
1076 rb_link_node(&new->o_node, parent, p);
1077 rb_insert_color(&new->o_node, &osdc->osds);
1078}
1079
1080static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1081{
1082 struct ceph_osd *osd;
1083 struct rb_node *n = osdc->osds.rb_node;
1084
1085 while (n) {
1086 osd = rb_entry(n, struct ceph_osd, o_node);
1087 if (o < osd->o_osd)
1088 n = n->rb_left;
1089 else if (o > osd->o_osd)
1090 n = n->rb_right;
1091 else
1092 return osd;
1093 }
1094 return NULL;
1095}
1096
422d2cb8
YS		 1097static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1098{
1099 schedule_delayed_work(&osdc->timeout_work,
3d14c5d2 1100 osdc->client->options->osd_keepalive_timeout * HZ);
422d2cb8
YS		 1101}
1102
1103static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1104{
1105 cancel_delayed_work(&osdc->timeout_work);
1106}
f24e9980
SW		 1107
1108/*
1109 * Register request, assign tid. If this is the first request, set up
1110 * the timeout event.
1111 */
a40c4f10
YS		 1112static void __register_request(struct ceph_osd_client *osdc,
1113 struct ceph_osd_request *req)
f24e9980 1114{
f24e9980 1115 req->r_tid = ++osdc->last_tid;
6df058c0 1116 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1117 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1118 __insert_request(osdc, req);
1119 ceph_osdc_get_request(req);
1120 osdc->num_requests++;
f24e9980 1121 if (osdc->num_requests == 1) {
422d2cb8
YS		 1122 dout(" first request, scheduling timeout\n");
1123 __schedule_osd_timeout(osdc);
f24e9980 1124 }
a40c4f10
YS		 1125}
1126
f24e9980
SW		 1127/*
1128 * called under osdc->request_mutex
1129 */
1130static void __unregister_request(struct ceph_osd_client *osdc,
1131 struct ceph_osd_request *req)
1132{
35f9f8a0
SW		 1133 if (RB_EMPTY_NODE(&req->r_node)) {
1134 dout("__unregister_request %p tid %lld not registered\n",
1135 req, req->r_tid);
1136 return;
1137 }
1138
f24e9980
SW		 1139 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1140 rb_erase(&req->r_node, &osdc->requests);
1141 osdc->num_requests--;
1142
0ba6478d
SW		 1143 if (req->r_osd) {
1144 /* make sure the original request isn't in flight. */
6740a845 1145 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1146
1147 list_del_init(&req->r_osd_item);
a40c4f10
YS		 1148 if (list_empty(&req->r_osd->o_requests) &&
1149 list_empty(&req->r_osd->o_linger_requests)) {
1150 dout("moving osd to %p lru\n", req->r_osd);
f5a2041b 1151 __move_osd_to_lru(osdc, req->r_osd);
a40c4f10 1152 }
fbdb9190 1153 if (list_empty(&req->r_linger_item))
a40c4f10 1154 req->r_osd = NULL;
0ba6478d 1155 }
f24e9980 1156
7d5f2481 1157 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1158 ceph_osdc_put_request(req);
1159
422d2cb8
YS		 1160 if (osdc->num_requests == 0) {
1161 dout(" no requests, canceling timeout\n");
1162 __cancel_osd_timeout(osdc);
f24e9980
SW		 1163 }
1164}
1165
1166/*
1167 * Cancel a previously queued request message
1168 */
1169static void __cancel_request(struct ceph_osd_request *req)
1170{
6bc18876 1171 if (req->r_sent && req->r_osd) {
6740a845 1172 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1173 req->r_sent = 0;
1174 }
1175}
1176
a40c4f10
YS		 1177static void __register_linger_request(struct ceph_osd_client *osdc,
1178 struct ceph_osd_request *req)
1179{
1180 dout("__register_linger_request %p\n", req);
1d02ec7f 1181 ceph_osdc_get_request(req);
a40c4f10 1182 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89
SW		 1183 if (req->r_osd)
1184 list_add_tail(&req->r_linger_osd,
1185 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1186}
1187
1188static void __unregister_linger_request(struct ceph_osd_client *osdc,
1189 struct ceph_osd_request *req)
1190{
1191 dout("__unregister_linger_request %p\n", req);
61c74035 1192 list_del_init(&req->r_linger_item);
a40c4f10 1193 if (req->r_osd) {
a40c4f10
YS		 1194 list_del_init(&req->r_linger_osd);
1195
1196 if (list_empty(&req->r_osd->o_requests) &&
1197 list_empty(&req->r_osd->o_linger_requests)) {
1198 dout("moving osd to %p lru\n", req->r_osd);
1199 __move_osd_to_lru(osdc, req->r_osd);
1200 }
fbdb9190
SW		 1201 if (list_empty(&req->r_osd_item))
1202 req->r_osd = NULL;
a40c4f10 1203 }
1d02ec7f 1204 ceph_osdc_put_request(req);
a40c4f10
YS		 1205}
1206
1207void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1208 struct ceph_osd_request *req)
1209{
1210 mutex_lock(&osdc->request_mutex);
1211 if (req->r_linger) {
c10ebbf5 1212 req->r_linger = 0;
1d02ec7f 1213 __unregister_linger_request(osdc, req);
a40c4f10
YS		 1214 }
1215 mutex_unlock(&osdc->request_mutex);
1216}
1217EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1218
1219void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1220 struct ceph_osd_request *req)
1221{
1222 if (!req->r_linger) {
1223 dout("set_request_linger %p\n", req);
1224 req->r_linger = 1;
a40c4f10
YS		 1225 }
1226}
1227EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1228
4892ed8d
JD		 1229/*
1230 * Returns whether a request should be blocked from being sent
1231 * based on the current osdmap and osd_client settings.
1232 *
1233 * Caller should hold map_sem for read.
1234 */
1235static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1236 struct ceph_osd_request *req)
1237{
1238 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1239 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1240 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1241 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1242 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1243}
1244
f24e9980
SW		 1245/*
1246 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1247 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1248 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1249 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1250 *
1251 * Return 0 if unchanged, 1 if changed, or negative on error.
1252 *
1253 * Caller should hold map_sem for read and request_mutex.
1254 */
6f6c7006 1255static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1256 struct ceph_osd_request *req, int force_resend)
f24e9980 1257{
5b191d99 1258 struct ceph_pg pgid;
d85b7056
SW		 1259 int acting[CEPH_PG_MAX_SIZE];
1260 int o = -1, num = 0;
f24e9980 1261 int err;
4892ed8d 1262 bool was_paused;
f24e9980 1263
6f6c7006 1264 dout("map_request %p tid %lld\n", req, req->r_tid);
41766f87
AE		 1265 err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
1266 ceph_file_layout_pg_pool(req->r_file_layout));
6f6c7006
SW		 1267 if (err) {
1268 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1269 return err;
6f6c7006 1270 }
7740a42f
SW		 1271 req->r_pgid = pgid;
1272
d85b7056
SW		 1273 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1274 if (err > 0) {
1275 o = acting[0];
1276 num = err;
1277 }
f24e9980 1278
4892ed8d
JD		 1279 was_paused = req->r_paused;
1280 req->r_paused = __req_should_be_paused(osdc, req);
1281 if (was_paused && !req->r_paused)
1282 force_resend = 1;
1283
38d6453c
SW		 1284 if ((!force_resend &&
1285 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1286 req->r_sent >= req->r_osd->o_incarnation &&
1287 req->r_num_pg_osds == num &&
1288 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
4892ed8d
JD		 1289 (req->r_osd == NULL && o == -1) ||
1290 req->r_paused)
f24e9980
SW		 1291 return 0; /* no change */
1292
5b191d99
SW		 1293 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1294 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1295 req->r_osd ? req->r_osd->o_osd : -1);
1296
d85b7056
SW		 1297 /* record full pg acting set */
1298 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1299 req->r_num_pg_osds = num;
1300
f24e9980
SW		 1301 if (req->r_osd) {
1302 __cancel_request(req);
1303 list_del_init(&req->r_osd_item);
f24e9980
SW		 1304 req->r_osd = NULL;
1305 }
1306
1307 req->r_osd = __lookup_osd(osdc, o);
1308 if (!req->r_osd && o >= 0) {
c99eb1c7 1309 err = -ENOMEM;
e10006f8 1310 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1311 if (!req->r_osd) {
1312 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1313 goto out;
6f6c7006 1314 }
f24e9980 1315
6f6c7006 1316 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1317 __insert_osd(osdc, req->r_osd);
1318
b7a9e5dd
SW		 1319 ceph_con_open(&req->r_osd->o_con,
1320 CEPH_ENTITY_TYPE_OSD, o,
1321 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1322 }
1323
f5a2041b
YS		 1324 if (req->r_osd) {
1325 __remove_osd_from_lru(req->r_osd);
ad885927
AE		 1326 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1327 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
6f6c7006 1328 } else {
ad885927 1329 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
f5a2041b 1330 }
d85b7056 1331 err = 1; /* osd or pg changed */
f24e9980
SW		 1332
1333out:
f24e9980
SW		 1334 return err;
1335}
1336
1337/*
1338 * caller should hold map_sem (for read) and request_mutex
1339 */
56e925b6
SW		 1340static void __send_request(struct ceph_osd_client *osdc,
1341 struct ceph_osd_request *req)
f24e9980 1342{
1b83bef2 1343 void *p;
f24e9980 1344
1b83bef2
SW		 1345 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1346 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1347 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1348
1349 /* fill in message content that changes each time we send it */
1350 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1351 put_unaligned_le32(req->r_flags, req->r_request_flags);
1352 put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
1353 p = req->r_request_pgid;
1354 ceph_encode_64(&p, req->r_pgid.pool);
1355 ceph_encode_32(&p, req->r_pgid.seed);
1356 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1357 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1358 sizeof(req->r_reassert_version));
2169aea6 1359
3dd72fc0 1360 req->r_stamp = jiffies;
07a27e22 1361 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1362
1363 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1364
f24e9980 1365 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1366
1367 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1368}
1369
6f6c7006
SW		 1370/*
1371 * Send any requests in the queue (req_unsent).
1372 */
f9d25199 1373static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1374{
1375 struct ceph_osd_request *req, *tmp;
1376
f9d25199
AE		 1377 dout("__send_queued\n");
1378 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1379 __send_request(osdc, req);
6f6c7006
SW		 1380}
1381
f24e9980
SW		 1382/*
1383 * Timeout callback, called every N seconds when 1 or more osd
1384 * requests has been active for more than N seconds. When this
1385 * happens, we ping all OSDs with requests who have timed out to
1386 * ensure any communications channel reset is detected. Reset the
1387 * request timeouts another N seconds in the future as we go.
1388 * Reschedule the timeout event another N seconds in future (unless
1389 * there are no open requests).
1390 */
1391static void handle_timeout(struct work_struct *work)
1392{
1393 struct ceph_osd_client *osdc =
1394 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1395 struct ceph_osd_request *req;
f24e9980 1396 struct ceph_osd *osd;
422d2cb8 1397 unsigned long keepalive =
3d14c5d2 1398 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1399 struct list_head slow_osds;
f24e9980
SW		 1400 dout("timeout\n");
1401 down_read(&osdc->map_sem);
1402
1403 ceph_monc_request_next_osdmap(&osdc->client->monc);
1404
1405 mutex_lock(&osdc->request_mutex);
f24e9980 1406
422d2cb8
YS		 1407 /*
1408 * ping osds that are a bit slow. this ensures that if there
1409 * is a break in the TCP connection we will notice, and reopen
1410 * a connection with that osd (from the fault callback).
1411 */
1412 INIT_LIST_HEAD(&slow_osds);
1413 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1414 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1415 break;
1416
1417 osd = req->r_osd;
1418 BUG_ON(!osd);
1419 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1420 req->r_tid, osd->o_osd);
422d2cb8
YS		 1421 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1422 }
1423 while (!list_empty(&slow_osds)) {
1424 osd = list_entry(slow_osds.next, struct ceph_osd,
1425 o_keepalive_item);
1426 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1427 ceph_con_keepalive(&osd->o_con);
1428 }
1429
422d2cb8 1430 __schedule_osd_timeout(osdc);
f9d25199 1431 __send_queued(osdc);
f24e9980 1432 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1433 up_read(&osdc->map_sem);
1434}
1435
f5a2041b
YS		 1436static void handle_osds_timeout(struct work_struct *work)
1437{
1438 struct ceph_osd_client *osdc =
1439 container_of(work, struct ceph_osd_client,
1440 osds_timeout_work.work);
1441 unsigned long delay =
3d14c5d2 1442 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1443
1444 dout("osds timeout\n");
1445 down_read(&osdc->map_sem);
aca420bc 1446 remove_old_osds(osdc);
f5a2041b
YS		 1447 up_read(&osdc->map_sem);
1448
1449 schedule_delayed_work(&osdc->osds_timeout_work,
1450 round_jiffies_relative(delay));
1451}
1452
25845472
SW		 1453static void complete_request(struct ceph_osd_request *req)
1454{
25845472
SW		 1455 complete_all(&req->r_safe_completion); /* fsync waiter */
1456}
1457
f24e9980
SW		 1458/*
1459 * handle osd op reply. either call the callback if it is specified,
1460 * or do the completion to wake up the waiting thread.
1461 */
350b1c32
SW		 1462static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1463 struct ceph_connection *con)
f24e9980 1464{
1b83bef2 1465 void *p, *end;
f24e9980
SW		 1466 struct ceph_osd_request *req;
1467 u64 tid;
1b83bef2 1468 int object_len;
79528734
AE		 1469 unsigned int numops;
1470 int payload_len, flags;
0ceed5db 1471 s32 result;
1b83bef2
SW		 1472 s32 retry_attempt;
1473 struct ceph_pg pg;
1474 int err;
1475 u32 reassert_epoch;
1476 u64 reassert_version;
1477 u32 osdmap_epoch;
0d5af164 1478 int already_completed;
9fc6e064 1479 u32 bytes;
79528734 1480 unsigned int i;
f24e9980 1481
6df058c0 1482 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1483 dout("handle_reply %p tid %llu\n", msg, tid);
1484
1485 p = msg->front.iov_base;
1486 end = p + msg->front.iov_len;
1487
1488 ceph_decode_need(&p, end, 4, bad);
1489 object_len = ceph_decode_32(&p);
1490 ceph_decode_need(&p, end, object_len, bad);
1491 p += object_len;
1492
ef4859d6 1493 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1494 if (err)
f24e9980 1495 goto bad;
1b83bef2
SW		 1496
1497 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1498 flags = ceph_decode_64(&p);
1499 result = ceph_decode_32(&p);
1500 reassert_epoch = ceph_decode_32(&p);
1501 reassert_version = ceph_decode_64(&p);
1502 osdmap_epoch = ceph_decode_32(&p);
1503
f24e9980
SW		 1504 /* lookup */
1505 mutex_lock(&osdc->request_mutex);
1506 req = __lookup_request(osdc, tid);
1507 if (req == NULL) {
1508 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1509 goto bad_mutex;
f24e9980
SW		 1510 }
1511 ceph_osdc_get_request(req);
1b83bef2
SW		 1512
1513 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1514 req, result);
1515
e9e4b13a 1516 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2
SW		 1517 numops = ceph_decode_32(&p);
1518 if (numops > CEPH_OSD_MAX_OP)
1519 goto bad_put;
1520 if (numops != req->r_num_ops)
1521 goto bad_put;
1522 payload_len = 0;
e9e4b13a 1523 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1524 for (i = 0; i < numops; i++) {
1525 struct ceph_osd_op *op = p;
1526 int len;
1527
1528 len = le32_to_cpu(op->payload_len);
1529 req->r_reply_op_len[i] = len;
1530 dout(" op %d has %d bytes\n", i, len);
1531 payload_len += len;
1532 p += sizeof(*op);
1533 }
9fc6e064
AE		 1534 bytes = le32_to_cpu(msg->hdr.data_len);
1535 if (payload_len != bytes) {
1b83bef2 1536 pr_warning("sum of op payload lens %d != data_len %d",
9fc6e064 1537 payload_len, bytes);
1b83bef2
SW		 1538 goto bad_put;
1539 }
1540
e9e4b13a 1541 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1542 retry_attempt = ceph_decode_32(&p);
1543 for (i = 0; i < numops; i++)
1544 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1545
aede2cb5
YZ		 1546 already_completed = req->r_got_reply;
1547
f24e9980 1548 if (!req->r_got_reply) {
f24e9980 1549
1b83bef2 1550 req->r_result = result;
f24e9980
SW		 1551 dout("handle_reply result %d bytes %d\n", req->r_result,
1552 bytes);
1553 if (req->r_result == 0)
1554 req->r_result = bytes;
1555
1556 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1557 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1558 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1559
1560 req->r_got_reply = 1;
1561 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1562 dout("handle_reply tid %llu dup ack\n", tid);
34b43a56 1563 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1564 goto done;
1565 }
1566
1567 dout("handle_reply tid %llu flags %d\n", tid, flags);
1568
a40c4f10
YS		 1569 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1570 __register_linger_request(osdc, req);
1571
f24e9980 1572 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1573 if (result < 0 ||
1574 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1575 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1576 __unregister_request(osdc, req);
1577
1578 mutex_unlock(&osdc->request_mutex);
1579
aede2cb5 1580 if (!already_completed) {
ef0b67e4
YZ		 1581 if (req->r_unsafe_callback &&
1582 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1583 req->r_unsafe_callback(req, true);
aede2cb5
YZ		 1584 if (req->r_callback)
1585 req->r_callback(req, msg);
1586 else
1587 complete_all(&req->r_completion);
1588 }
f24e9980 1589
ef0b67e4
YZ		 1590 if (flags & CEPH_OSD_FLAG_ONDISK) {
1591 if (req->r_unsafe_callback && already_completed)
1592 req->r_unsafe_callback(req, false);
25845472 1593 complete_request(req);
ef0b67e4 1594 }
f24e9980
SW		 1595
1596done:
a40c4f10 1597 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1598 ceph_osdc_put_request(req);
1599 return;
1600
1b83bef2
SW		 1601bad_put:
1602 ceph_osdc_put_request(req);
8058fd45
AE		 1603bad_mutex:
1604 mutex_unlock(&osdc->request_mutex);
f24e9980 1605bad:
1b83bef2
SW		 1606 pr_err("corrupt osd_op_reply got %d %d\n",
1607 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1608 ceph_msg_dump(msg);
f24e9980
SW		 1609}
1610
6f6c7006 1611static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1612{
f24e9980 1613 struct rb_node *p, *n;
f24e9980 1614
6f6c7006
SW		 1615 for (p = rb_first(&osdc->osds); p; p = n) {
1616 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1617
6f6c7006
SW		 1618 n = rb_next(p);
1619 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1620 memcmp(&osd->o_con.peer_addr,
1621 ceph_osd_addr(osdc->osdmap,
1622 osd->o_osd),
1623 sizeof(struct ceph_entity_addr)) != 0)
1624 __reset_osd(osdc, osd);
f24e9980 1625 }
422d2cb8
YS		 1626}
1627
1628/*
6f6c7006
SW		 1629 * Requeue requests whose mapping to an OSD has changed. If requests map to
1630 * no osd, request a new map.
422d2cb8 1631 *
e6d50f67 1632 * Caller should hold map_sem for read.
422d2cb8 1633 */
27ff9f13
JD		 1634static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1635 bool force_resend_writes)
422d2cb8 1636{
a40c4f10 1637 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1638 struct rb_node *p;
1639 int needmap = 0;
1640 int err;
27ff9f13 1641 bool force_resend_req;
422d2cb8 1642
27ff9f13
JD		 1643 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1644 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1645 mutex_lock(&osdc->request_mutex);
6194ea89 1646 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1647 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1648 p = rb_next(p);
ab60b16d
AE		 1649
1650 /*
1651 * For linger requests that have not yet been
1652 * registered, move them to the linger list; they'll
1653 * be sent to the osd in the loop below. Unregister
1654 * the request before re-registering it as a linger
1655 * request to ensure the __map_request() below
1656 * will decide it needs to be sent.
1657 */
1658 if (req->r_linger && list_empty(&req->r_linger_item)) {
1659 dout("%p tid %llu restart on osd%d\n",
1660 req, req->r_tid,
1661 req->r_osd ? req->r_osd->o_osd : -1);
1d02ec7f 1662 ceph_osdc_get_request(req);
ab60b16d
AE		 1663 __unregister_request(osdc, req);
1664 __register_linger_request(osdc, req);
1d02ec7f 1665 ceph_osdc_put_request(req);
ab60b16d
AE		 1666 continue;
1667 }
1668
27ff9f13
JD		 1669 force_resend_req = force_resend ||
1670 (force_resend_writes &&
1671 req->r_flags & CEPH_OSD_FLAG_WRITE);
1672 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 1673 if (err < 0)
1674 continue; /* error */
1675 if (req->r_osd == NULL) {
1676 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1677 needmap++; /* request a newer map */
1678 } else if (err > 0) {
6194ea89
SW		 1679 if (!req->r_linger) {
1680 dout("%p tid %llu requeued on osd%d\n", req,
1681 req->r_tid,
1682 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1683 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1684 }
1685 }
a40c4f10
YS		 1686 }
1687
1688 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1689 r_linger_item) {
1690 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1691
27ff9f13
JD		 1692 err = __map_request(osdc, req,
1693 force_resend || force_resend_writes);
ab60b16d 1694 dout("__map_request returned %d\n", err);
a40c4f10
YS		 1695 if (err == 0)
1696 continue; /* no change and no osd was specified */
1697 if (err < 0)
1698 continue; /* hrm! */
1699 if (req->r_osd == NULL) {
1700 dout("tid %llu maps to no valid osd\n", req->r_tid);
1701 needmap++; /* request a newer map */
1702 continue;
6f6c7006 1703 }
a40c4f10
YS		 1704
1705 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1706 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1707 __register_request(osdc, req);
c89ce05e 1708 __unregister_linger_request(osdc, req);
6f6c7006 1709 }
14d2f38d 1710 reset_changed_osds(osdc);
f24e9980
SW		 1711 mutex_unlock(&osdc->request_mutex);
1712
1713 if (needmap) {
1714 dout("%d requests for down osds, need new map\n", needmap);
1715 ceph_monc_request_next_osdmap(&osdc->client->monc);
1716 }
422d2cb8 1717}
6f6c7006
SW		 1718
1719
f24e9980
SW		 1720/*
1721 * Process updated osd map.
1722 *
1723 * The message contains any number of incremental and full maps, normally
1724 * indicating some sort of topology change in the cluster. Kick requests
1725 * off to different OSDs as needed.
1726 */
1727void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1728{
1729 void *p, *end, *next;
1730 u32 nr_maps, maplen;
1731 u32 epoch;
1732 struct ceph_osdmap *newmap = NULL, *oldmap;
1733 int err;
1734 struct ceph_fsid fsid;
27ff9f13 1735 bool was_full;
f24e9980
SW		 1736
1737 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1738 p = msg->front.iov_base;
1739 end = p + msg->front.iov_len;
1740
1741 /* verify fsid */
1742 ceph_decode_need(&p, end, sizeof(fsid), bad);
1743 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 1744 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1745 return;
f24e9980
SW		 1746
1747 down_write(&osdc->map_sem);
1748
27ff9f13
JD		 1749 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1750
f24e9980
SW		 1751 /* incremental maps */
1752 ceph_decode_32_safe(&p, end, nr_maps, bad);
1753 dout(" %d inc maps\n", nr_maps);
1754 while (nr_maps > 0) {
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 next = p + maplen;
1760 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1761 dout("applying incremental map %u len %d\n",
1762 epoch, maplen);
1763 newmap = osdmap_apply_incremental(&p, next,
1764 osdc->osdmap,
15d9882c 1765 &osdc->client->msgr);
f24e9980
SW		 1766 if (IS_ERR(newmap)) {
1767 err = PTR_ERR(newmap);
1768 goto bad;
1769 }
30dc6381 1770 BUG_ON(!newmap);
f24e9980
SW		 1771 if (newmap != osdc->osdmap) {
1772 ceph_osdmap_destroy(osdc->osdmap);
1773 osdc->osdmap = newmap;
1774 }
27ff9f13
JD		 1775 was_full = was_full ||
1776 ceph_osdmap_flag(osdc->osdmap,
1777 CEPH_OSDMAP_FULL);
1778 kick_requests(osdc, 0, was_full);
f24e9980
SW		 1779 } else {
1780 dout("ignoring incremental map %u len %d\n",
1781 epoch, maplen);
1782 }
1783 p = next;
1784 nr_maps--;
1785 }
1786 if (newmap)
1787 goto done;
1788
1789 /* full maps */
1790 ceph_decode_32_safe(&p, end, nr_maps, bad);
1791 dout(" %d full maps\n", nr_maps);
1792 while (nr_maps) {
1793 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 1794 epoch = ceph_decode_32(&p);
1795 maplen = ceph_decode_32(&p);
f24e9980
SW		 1796 ceph_decode_need(&p, end, maplen, bad);
1797 if (nr_maps > 1) {
1798 dout("skipping non-latest full map %u len %d\n",
1799 epoch, maplen);
1800 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1801 dout("skipping full map %u len %d, "
1802 "older than our %u\n", epoch, maplen,
1803 osdc->osdmap->epoch);
1804 } else {
38d6453c
SW		 1805 int skipped_map = 0;
1806
f24e9980
SW		 1807 dout("taking full map %u len %d\n", epoch, maplen);
1808 newmap = osdmap_decode(&p, p+maplen);
1809 if (IS_ERR(newmap)) {
1810 err = PTR_ERR(newmap);
1811 goto bad;
1812 }
30dc6381 1813 BUG_ON(!newmap);
f24e9980
SW		 1814 oldmap = osdc->osdmap;
1815 osdc->osdmap = newmap;
38d6453c
SW		 1816 if (oldmap) {
1817 if (oldmap->epoch + 1 < newmap->epoch)
1818 skipped_map = 1;
f24e9980 1819 ceph_osdmap_destroy(oldmap);
38d6453c 1820 }
27ff9f13
JD		 1821 was_full = was_full ||
1822 ceph_osdmap_flag(osdc->osdmap,
1823 CEPH_OSDMAP_FULL);
1824 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 1825 }
1826 p += maplen;
1827 nr_maps--;
1828 }
1829
53341d7d
DC		 1830 if (!osdc->osdmap)
1831 goto bad;
f24e9980
SW		 1832done:
1833 downgrade_write(&osdc->map_sem);
1834 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 1835
1836 /*
1837 * subscribe to subsequent osdmap updates if full to ensure
1838 * we find out when we are no longer full and stop returning
1839 * ENOSPC.
1840 */
4892ed8d
JD		 1841 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1842 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
1843 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 1844 ceph_monc_request_next_osdmap(&osdc->client->monc);
1845
f9d25199
AE		 1846 mutex_lock(&osdc->request_mutex);
1847 __send_queued(osdc);
1848 mutex_unlock(&osdc->request_mutex);
f24e9980 1849 up_read(&osdc->map_sem);
03066f23 1850 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 1851 return;
1852
1853bad:
1854 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 1855 ceph_msg_dump(msg);
f24e9980
SW		 1856 up_write(&osdc->map_sem);
1857 return;
1858}
1859
a40c4f10
YS		 1860/*
1861 * watch/notify callback event infrastructure
1862 *
1863 * These callbacks are used both for watch and notify operations.
1864 */
1865static void __release_event(struct kref *kref)
1866{
1867 struct ceph_osd_event *event =
1868 container_of(kref, struct ceph_osd_event, kref);
1869
1870 dout("__release_event %p\n", event);
1871 kfree(event);
1872}
1873
1874static void get_event(struct ceph_osd_event *event)
1875{
1876 kref_get(&event->kref);
1877}
1878
1879void ceph_osdc_put_event(struct ceph_osd_event *event)
1880{
1881 kref_put(&event->kref, __release_event);
1882}
1883EXPORT_SYMBOL(ceph_osdc_put_event);
1884
1885static void __insert_event(struct ceph_osd_client *osdc,
1886 struct ceph_osd_event *new)
1887{
1888 struct rb_node **p = &osdc->event_tree.rb_node;
1889 struct rb_node *parent = NULL;
1890 struct ceph_osd_event *event = NULL;
1891
1892 while (*p) {
1893 parent = *p;
1894 event = rb_entry(parent, struct ceph_osd_event, node);
1895 if (new->cookie < event->cookie)
1896 p = &(*p)->rb_left;
1897 else if (new->cookie > event->cookie)
1898 p = &(*p)->rb_right;
1899 else
1900 BUG();
1901 }
1902
1903 rb_link_node(&new->node, parent, p);
1904 rb_insert_color(&new->node, &osdc->event_tree);
1905}
1906
1907static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
1908 u64 cookie)
1909{
1910 struct rb_node **p = &osdc->event_tree.rb_node;
1911 struct rb_node *parent = NULL;
1912 struct ceph_osd_event *event = NULL;
1913
1914 while (*p) {
1915 parent = *p;
1916 event = rb_entry(parent, struct ceph_osd_event, node);
1917 if (cookie < event->cookie)
1918 p = &(*p)->rb_left;
1919 else if (cookie > event->cookie)
1920 p = &(*p)->rb_right;
1921 else
1922 return event;
1923 }
1924 return NULL;
1925}
1926
1927static void __remove_event(struct ceph_osd_event *event)
1928{
1929 struct ceph_osd_client *osdc = event->osdc;
1930
1931 if (!RB_EMPTY_NODE(&event->node)) {
1932 dout("__remove_event removed %p\n", event);
1933 rb_erase(&event->node, &osdc->event_tree);
1934 ceph_osdc_put_event(event);
1935 } else {
1936 dout("__remove_event didn't remove %p\n", event);
1937 }
1938}
1939
1940int ceph_osdc_create_event(struct ceph_osd_client *osdc,
1941 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 1942 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 1943{
1944 struct ceph_osd_event *event;
1945
1946 event = kmalloc(sizeof(*event), GFP_NOIO);
1947 if (!event)
1948 return -ENOMEM;
1949
1950 dout("create_event %p\n", event);
1951 event->cb = event_cb;
3c663bbd 1952 event->one_shot = 0;
a40c4f10
YS		 1953 event->data = data;
1954 event->osdc = osdc;
1955 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 1956 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 1957 kref_init(&event->kref); /* one ref for us */
1958 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 1959
1960 spin_lock(&osdc->event_lock);
1961 event->cookie = ++osdc->event_count;
1962 __insert_event(osdc, event);
1963 spin_unlock(&osdc->event_lock);
1964
1965 *pevent = event;
1966 return 0;
1967}
1968EXPORT_SYMBOL(ceph_osdc_create_event);
1969
1970void ceph_osdc_cancel_event(struct ceph_osd_event *event)
1971{
1972 struct ceph_osd_client *osdc = event->osdc;
1973
1974 dout("cancel_event %p\n", event);
1975 spin_lock(&osdc->event_lock);
1976 __remove_event(event);
1977 spin_unlock(&osdc->event_lock);
1978 ceph_osdc_put_event(event); /* caller's */
1979}
1980EXPORT_SYMBOL(ceph_osdc_cancel_event);
1981
1982
1983static void do_event_work(struct work_struct *work)
1984{
1985 struct ceph_osd_event_work *event_work =
1986 container_of(work, struct ceph_osd_event_work, work);
1987 struct ceph_osd_event *event = event_work->event;
1988 u64 ver = event_work->ver;
1989 u64 notify_id = event_work->notify_id;
1990 u8 opcode = event_work->opcode;
1991
1992 dout("do_event_work completing %p\n", event);
1993 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 1994 dout("do_event_work completed %p\n", event);
1995 ceph_osdc_put_event(event);
1996 kfree(event_work);
1997}
1998
1999
2000/*
2001 * Process osd watch notifications
2002 */
3c663bbd
AE		 2003static void handle_watch_notify(struct ceph_osd_client *osdc,
2004 struct ceph_msg *msg)
a40c4f10
YS		 2005{
2006 void *p, *end;
2007 u8 proto_ver;
2008 u64 cookie, ver, notify_id;
2009 u8 opcode;
2010 struct ceph_osd_event *event;
2011 struct ceph_osd_event_work *event_work;
2012
2013 p = msg->front.iov_base;
2014 end = p + msg->front.iov_len;
2015
2016 ceph_decode_8_safe(&p, end, proto_ver, bad);
2017 ceph_decode_8_safe(&p, end, opcode, bad);
2018 ceph_decode_64_safe(&p, end, cookie, bad);
2019 ceph_decode_64_safe(&p, end, ver, bad);
2020 ceph_decode_64_safe(&p, end, notify_id, bad);
2021
2022 spin_lock(&osdc->event_lock);
2023 event = __find_event(osdc, cookie);
2024 if (event) {
3c663bbd 2025 BUG_ON(event->one_shot);
a40c4f10 2026 get_event(event);
a40c4f10
YS		 2027 }
2028 spin_unlock(&osdc->event_lock);
2029 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2030 cookie, ver, event);
2031 if (event) {
2032 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10
YS		 2033 if (!event_work) {
2034 dout("ERROR: could not allocate event_work\n");
2035 goto done_err;
2036 }
6b0ae409 2037 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2038 event_work->event = event;
2039 event_work->ver = ver;
2040 event_work->notify_id = notify_id;
2041 event_work->opcode = opcode;
2042 if (!queue_work(osdc->notify_wq, &event_work->work)) {
2043 dout("WARNING: failed to queue notify event work\n");
2044 goto done_err;
2045 }
2046 }
2047
2048 return;
2049
2050done_err:
a40c4f10
YS		 2051 ceph_osdc_put_event(event);
2052 return;
2053
2054bad:
2055 pr_err("osdc handle_watch_notify corrupt msg\n");
2056 return;
2057}
2058
e65550fd
AE		 2059/*
2060 * build new request AND message
2061 *
2062 */
2063void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2064 struct ceph_snap_context *snapc, u64 snap_id,
2065 struct timespec *mtime)
2066{
2067 struct ceph_msg *msg = req->r_request;
2068 void *p;
2069 size_t msg_size;
2070 int flags = req->r_flags;
2071 u64 data_len;
2072 unsigned int i;
2073
2074 req->r_snapid = snap_id;
2075 req->r_snapc = ceph_get_snap_context(snapc);
2076
2077 /* encode request */
2078 msg->hdr.version = cpu_to_le16(4);
2079
2080 p = msg->front.iov_base;
2081 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2082 req->r_request_osdmap_epoch = p;
2083 p += 4;
2084 req->r_request_flags = p;
2085 p += 4;
2086 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2087 ceph_encode_timespec(p, mtime);
2088 p += sizeof(struct ceph_timespec);
2089 req->r_request_reassert_version = p;
2090 p += sizeof(struct ceph_eversion); /* will get filled in */
2091
2092 /* oloc */
2093 ceph_encode_8(&p, 4);
2094 ceph_encode_8(&p, 4);
2095 ceph_encode_32(&p, 8 + 4 + 4);
2096 req->r_request_pool = p;
2097 p += 8;
2098 ceph_encode_32(&p, -1); /* preferred */
2099 ceph_encode_32(&p, 0); /* key len */
2100
2101 ceph_encode_8(&p, 1);
2102 req->r_request_pgid = p;
2103 p += 8 + 4;
2104 ceph_encode_32(&p, -1); /* preferred */
2105
2106 /* oid */
2107 ceph_encode_32(&p, req->r_oid_len);
2108 memcpy(p, req->r_oid, req->r_oid_len);
2109 dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
2110 p += req->r_oid_len;
2111
2112 /* ops--can imply data */
2113 ceph_encode_16(&p, (u16)req->r_num_ops);
2114 data_len = 0;
2115 for (i = 0; i < req->r_num_ops; i++) {
2116 data_len += osd_req_encode_op(req, p, i);
2117 p += sizeof(struct ceph_osd_op);
2118 }
2119
2120 /* snaps */
2121 ceph_encode_64(&p, req->r_snapid);
2122 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2123 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2124 if (req->r_snapc) {
2125 for (i = 0; i < snapc->num_snaps; i++) {
2126 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2127 }
2128 }
2129
2130 req->r_request_attempts = p;
2131 p += 4;
2132
2133 /* data */
2134 if (flags & CEPH_OSD_FLAG_WRITE) {
2135 u16 data_off;
2136
2137 /*
2138 * The header "data_off" is a hint to the receiver
2139 * allowing it to align received data into its
2140 * buffers such that there's no need to re-copy
2141 * it before writing it to disk (direct I/O).
2142 */
2143 data_off = (u16) (off & 0xffff);
2144 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2145 }
2146 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2147
2148 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2149 msg_size = p - msg->front.iov_base;
2150 msg->front.iov_len = msg_size;
2151 msg->hdr.front_len = cpu_to_le32(msg_size);
2152
2153 dout("build_request msg_size was %d\n", (int)msg_size);
2154}
2155EXPORT_SYMBOL(ceph_osdc_build_request);
2156
70636773
AE		 2157/*
2158 * Register request, send initial attempt.
2159 */
2160int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2161 struct ceph_osd_request *req,
2162 bool nofail)
2163{
2164 int rc = 0;
2165
f24e9980
SW		 2166 down_read(&osdc->map_sem);
2167 mutex_lock(&osdc->request_mutex);
dc4b870c 2168 __register_request(osdc, req);
c10ebbf5
AE		 2169 req->r_sent = 0;
2170 req->r_got_reply = 0;
92451b49
AE		 2171 rc = __map_request(osdc, req, 0);
2172 if (rc < 0) {
2173 if (nofail) {
2174 dout("osdc_start_request failed map, "
2175 " will retry %lld\n", req->r_tid);
2176 rc = 0;
2ab0ad6a 2177 } else {
2178 __unregister_request(osdc, req);
f24e9980 2179 }
92451b49 2180 goto out_unlock;
f24e9980 2181 }
92451b49
AE		 2182 if (req->r_osd == NULL) {
2183 dout("send_request %p no up osds in pg\n", req);
2184 ceph_monc_request_next_osdmap(&osdc->client->monc);
2185 } else {
7e2766a1 2186 __send_queued(osdc);
92451b49
AE		 2187 }
2188 rc = 0;
234af26f 2189out_unlock:
f24e9980
SW		 2190 mutex_unlock(&osdc->request_mutex);
2191 up_read(&osdc->map_sem);
2192 return rc;
2193}
3d14c5d2 2194EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980
SW		 2195
2196/*
2197 * wait for a request to complete
2198 */
2199int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2200 struct ceph_osd_request *req)
2201{
2202 int rc;
2203
2204 rc = wait_for_completion_interruptible(&req->r_completion);
2205 if (rc < 0) {
2206 mutex_lock(&osdc->request_mutex);
2207 __cancel_request(req);
529cfcc4 2208 __unregister_request(osdc, req);
f24e9980 2209 mutex_unlock(&osdc->request_mutex);
25845472 2210 complete_request(req);
529cfcc4 2211 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
f24e9980
SW		 2212 return rc;
2213 }
2214
2215 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2216 return req->r_result;
2217}
3d14c5d2 2218EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2219
2220/*
2221 * sync - wait for all in-flight requests to flush. avoid starvation.
2222 */
2223void ceph_osdc_sync(struct ceph_osd_client *osdc)
2224{
2225 struct ceph_osd_request *req;
2226 u64 last_tid, next_tid = 0;
2227
2228 mutex_lock(&osdc->request_mutex);
2229 last_tid = osdc->last_tid;
2230 while (1) {
2231 req = __lookup_request_ge(osdc, next_tid);
2232 if (!req)
2233 break;
2234 if (req->r_tid > last_tid)
2235 break;
2236
2237 next_tid = req->r_tid + 1;
2238 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2239 continue;
2240
2241 ceph_osdc_get_request(req);
2242 mutex_unlock(&osdc->request_mutex);
2243 dout("sync waiting on tid %llu (last is %llu)\n",
2244 req->r_tid, last_tid);
2245 wait_for_completion(&req->r_safe_completion);
2246 mutex_lock(&osdc->request_mutex);
2247 ceph_osdc_put_request(req);
2248 }
2249 mutex_unlock(&osdc->request_mutex);
2250 dout("sync done (thru tid %llu)\n", last_tid);
2251}
3d14c5d2 2252EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2253
a2e5951b
JD		 2254/*
2255 * Call all pending notify callbacks - for use after a watch is
2256 * unregistered, to make sure no more callbacks for it will be invoked
2257 */
2258extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2259{
2260 flush_workqueue(osdc->notify_wq);
2261}
2262EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2263
2264
f24e9980
SW		 2265/*
2266 * init, shutdown
2267 */
2268int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2269{
2270 int err;
2271
2272 dout("init\n");
2273 osdc->client = client;
2274 osdc->osdmap = NULL;
2275 init_rwsem(&osdc->map_sem);
2276 init_completion(&osdc->map_waiters);
2277 osdc->last_requested_map = 0;
2278 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2279 osdc->last_tid = 0;
2280 osdc->osds = RB_ROOT;
f5a2041b 2281 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2282 osdc->requests = RB_ROOT;
422d2cb8 2283 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2284 INIT_LIST_HEAD(&osdc->req_unsent);
2285 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2286 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2287 osdc->num_requests = 0;
2288 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2289 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2290 spin_lock_init(&osdc->event_lock);
2291 osdc->event_tree = RB_ROOT;
2292 osdc->event_count = 0;
f5a2041b
YS		 2293
2294 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2295 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2296
5f44f142 2297 err = -ENOMEM;
f24e9980
SW		 2298 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2299 sizeof(struct ceph_osd_request));
2300 if (!osdc->req_mempool)
5f44f142 2301 goto out;
f24e9980 2302
d50b409f
SW		 2303 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2304 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2305 "osd_op");
f24e9980 2306 if (err < 0)
5f44f142 2307 goto out_mempool;
d50b409f 2308 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2309 OSD_OPREPLY_FRONT_LEN, 10, true,
2310 "osd_op_reply");
c16e7869
SW		 2311 if (err < 0)
2312 goto out_msgpool;
a40c4f10 2313
3834fb30 2314 err = -ENOMEM;
a40c4f10 2315 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
3834fb30 2316 if (!osdc->notify_wq)
a40c4f10 2317 goto out_msgpool;
f24e9980 2318 return 0;
5f44f142 2319
c16e7869
SW		 2320out_msgpool:
2321 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2322out_mempool:
2323 mempool_destroy(osdc->req_mempool);
2324out:
2325 return err;
f24e9980
SW		 2326}
2327
2328void ceph_osdc_stop(struct ceph_osd_client *osdc)
2329{
a40c4f10
YS		 2330 flush_workqueue(osdc->notify_wq);
2331 destroy_workqueue(osdc->notify_wq);
f24e9980 2332 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2333 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2334 if (osdc->osdmap) {
2335 ceph_osdmap_destroy(osdc->osdmap);
2336 osdc->osdmap = NULL;
2337 }
aca420bc 2338 remove_all_osds(osdc);
f24e9980
SW		 2339 mempool_destroy(osdc->req_mempool);
2340 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2341 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2342}
2343
2344/*
2345 * Read some contiguous pages. If we cross a stripe boundary, shorten
2346 * *plen. Return number of bytes read, or error.
2347 */
2348int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2349 struct ceph_vino vino, struct ceph_file_layout *layout,
2350 u64 off, u64 *plen,
2351 u32 truncate_seq, u64 truncate_size,
b7495fc2 2352 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2353{
2354 struct ceph_osd_request *req;
2355 int rc = 0;
2356
2357 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2358 vino.snap, off, *plen);
79528734 2359 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
f24e9980 2360 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2361 NULL, truncate_seq, truncate_size,
153e5167 2362 false);
6816282d
SW		 2363 if (IS_ERR(req))
2364 return PTR_ERR(req);
f24e9980
SW		 2365
2366 /* it may be a short read due to an object boundary */
0fff87ec 2367
406e2c9f 2368 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2369 pages, *plen, page_align, false, false);
f24e9980 2370
e0c59487 2371 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2372 off, *plen, *plen, page_align);
f24e9980 2373
79528734 2374 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2375
f24e9980
SW		 2376 rc = ceph_osdc_start_request(osdc, req, false);
2377 if (!rc)
2378 rc = ceph_osdc_wait_request(osdc, req);
2379
2380 ceph_osdc_put_request(req);
2381 dout("readpages result %d\n", rc);
2382 return rc;
2383}
3d14c5d2 2384EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2385
2386/*
2387 * do a synchronous write on N pages
2388 */
2389int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2390 struct ceph_file_layout *layout,
2391 struct ceph_snap_context *snapc,
2392 u64 off, u64 len,
2393 u32 truncate_seq, u64 truncate_size,
2394 struct timespec *mtime,
24808826 2395 struct page **pages, int num_pages)
f24e9980
SW		 2396{
2397 struct ceph_osd_request *req;
2398 int rc = 0;
b7495fc2 2399 int page_align = off & ~PAGE_MASK;
f24e9980 2400
acead002 2401 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
79528734 2402 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
f24e9980 2403 CEPH_OSD_OP_WRITE,
24808826 2404 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2405 snapc, truncate_seq, truncate_size,
153e5167 2406 true);
6816282d
SW		 2407 if (IS_ERR(req))
2408 return PTR_ERR(req);
f24e9980
SW		 2409
2410 /* it may be a short write due to an object boundary */
406e2c9f 2411 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2412 false, false);
2413 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2414
79528734 2415 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2416
87f979d3 2417 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2418 if (!rc)
2419 rc = ceph_osdc_wait_request(osdc, req);
2420
2421 ceph_osdc_put_request(req);
2422 if (rc == 0)
2423 rc = len;
2424 dout("writepages result %d\n", rc);
2425 return rc;
2426}
3d14c5d2 2427EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2428
5522ae0b
AE		 2429int ceph_osdc_setup(void)
2430{
2431 BUG_ON(ceph_osd_request_cache);
2432 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2433 sizeof (struct ceph_osd_request),
2434 __alignof__(struct ceph_osd_request),
2435 0, NULL);
2436
2437 return ceph_osd_request_cache ? 0 : -ENOMEM;
2438}
2439EXPORT_SYMBOL(ceph_osdc_setup);
2440
2441void ceph_osdc_cleanup(void)
2442{
2443 BUG_ON(!ceph_osd_request_cache);
2444 kmem_cache_destroy(ceph_osd_request_cache);
2445 ceph_osd_request_cache = NULL;
2446}
2447EXPORT_SYMBOL(ceph_osdc_cleanup);
2448
f24e9980
SW		 2449/*
2450 * handle incoming message
2451 */
2452static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2453{
2454 struct ceph_osd *osd = con->private;
32c895e7 2455 struct ceph_osd_client *osdc;
f24e9980
SW		 2456 int type = le16_to_cpu(msg->hdr.type);
2457
2458 if (!osd)
4a32f93d 2459 goto out;
32c895e7 2460 osdc = osd->o_osdc;
f24e9980
SW		 2461
2462 switch (type) {
2463 case CEPH_MSG_OSD_MAP:
2464 ceph_osdc_handle_map(osdc, msg);
2465 break;
2466 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2467 handle_reply(osdc, msg, con);
f24e9980 2468 break;
a40c4f10
YS		 2469 case CEPH_MSG_WATCH_NOTIFY:
2470 handle_watch_notify(osdc, msg);
2471 break;
f24e9980
SW		 2472
2473 default:
2474 pr_err("received unknown message type %d %s\n", type,
2475 ceph_msg_type_name(type));
2476 }
4a32f93d 2477out:
f24e9980
SW		 2478 ceph_msg_put(msg);
2479}
2480
5b3a4db3 2481/*
21b667f6
SW		 2482 * lookup and return message for incoming reply. set up reply message
2483 * pages.
5b3a4db3
SW		 2484 */
2485static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2486 struct ceph_msg_header *hdr,
2487 int *skip)
f24e9980
SW		 2488{
2489 struct ceph_osd *osd = con->private;
2490 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2491 struct ceph_msg *m;
0547a9b3 2492 struct ceph_osd_request *req;
5b3a4db3
SW		 2493 int front = le32_to_cpu(hdr->front_len);
2494 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2495 u64 tid;
f24e9980 2496
0547a9b3
YS		 2497 tid = le64_to_cpu(hdr->tid);
2498 mutex_lock(&osdc->request_mutex);
2499 req = __lookup_request(osdc, tid);
2500 if (!req) {
2501 *skip = 1;
2502 m = NULL;
756a16a5
SW		 2503 dout("get_reply unknown tid %llu from osd%d\n", tid,
2504 osd->o_osd);
0547a9b3
YS		 2505 goto out;
2506 }
c16e7869 2507
ace6d3a9 2508 if (req->r_reply->con)
8921d114 2509 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2510 req->r_reply, req->r_reply->con);
2511 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2512
c16e7869
SW		 2513 if (front > req->r_reply->front.iov_len) {
2514 pr_warning("get_reply front %d > preallocated %d\n",
2515 front, (int)req->r_reply->front.iov_len);
b61c2763 2516 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
a79832f2 2517 if (!m)
c16e7869
SW		 2518 goto out;
2519 ceph_msg_put(req->r_reply);
2520 req->r_reply = m;
2521 }
2522 m = ceph_msg_get(req->r_reply);
2523
0547a9b3 2524 if (data_len > 0) {
a4ce40a9 2525 struct ceph_osd_data *osd_data;
0fff87ec 2526
a4ce40a9
AE		 2527 /*
2528 * XXX This is assuming there is only one op containing
2529 * XXX page data. Probably OK for reads, but this
2530 * XXX ought to be done more generally.
2531 */
406e2c9f 2532 osd_data = osd_req_op_extent_osd_data(req, 0);
0fff87ec 2533 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2534 if (osd_data->pages &&
e0c59487 2535 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2536
e0c59487
AE		 2537 pr_warning("tid %lld reply has %d bytes "
2538 "we had only %llu bytes ready\n",
2539 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2540 *skip = 1;
2541 ceph_msg_put(m);
2542 m = NULL;
2543 goto out;
2544 }
2ac2b7a6 2545 }
0547a9b3 2546 }
5b3a4db3 2547 *skip = 0;
c16e7869 2548 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2549
2550out:
2551 mutex_unlock(&osdc->request_mutex);
2450418c 2552 return m;
5b3a4db3
SW		 2553
2554}
2555
2556static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2557 struct ceph_msg_header *hdr,
2558 int *skip)
2559{
2560 struct ceph_osd *osd = con->private;
2561 int type = le16_to_cpu(hdr->type);
2562 int front = le32_to_cpu(hdr->front_len);
2563
1c20f2d2 2564 *skip = 0;
5b3a4db3
SW		 2565 switch (type) {
2566 case CEPH_MSG_OSD_MAP:
a40c4f10 2567 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2568 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2569 case CEPH_MSG_OSD_OPREPLY:
2570 return get_reply(con, hdr, skip);
2571 default:
2572 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2573 osd->o_osd);
2574 *skip = 1;
2575 return NULL;
2576 }
f24e9980
SW		 2577}
2578
2579/*
2580 * Wrappers to refcount containing ceph_osd struct
2581 */
2582static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2583{
2584 struct ceph_osd *osd = con->private;
2585 if (get_osd(osd))
2586 return con;
2587 return NULL;
2588}
2589
2590static void put_osd_con(struct ceph_connection *con)
2591{
2592 struct ceph_osd *osd = con->private;
2593 put_osd(osd);
2594}
2595
4e7a5dcd
SW		 2596/*
2597 * authentication
2598 */
a3530df3
AE		 2599/*
2600 * Note: returned pointer is the address of a structure that's
2601 * managed separately. Caller must *not* attempt to free it.
2602 */
2603static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2604 int *proto, int force_new)
4e7a5dcd
SW		 2605{
2606 struct ceph_osd *o = con->private;
2607 struct ceph_osd_client *osdc = o->o_osdc;
2608 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2609 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2610
74f1869f 2611 if (force_new && auth->authorizer) {
27859f97 2612 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2613 auth->authorizer = NULL;
2614 }
27859f97
SW		 2615 if (!auth->authorizer) {
2616 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2617 auth);
4e7a5dcd 2618 if (ret)
a3530df3 2619 return ERR_PTR(ret);
27859f97
SW		 2620 } else {
2621 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2622 auth);
2623 if (ret)
2624 return ERR_PTR(ret);
4e7a5dcd 2625 }
4e7a5dcd 2626 *proto = ac->protocol;
74f1869f 2627
a3530df3 2628 return auth;
4e7a5dcd
SW		 2629}
2630
2631
2632static int verify_authorizer_reply(struct ceph_connection *con, int len)
2633{
2634 struct ceph_osd *o = con->private;
2635 struct ceph_osd_client *osdc = o->o_osdc;
2636 struct ceph_auth_client *ac = osdc->client->monc.auth;
2637
27859f97 2638 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2639}
2640
9bd2e6f8
SW		 2641static int invalidate_authorizer(struct ceph_connection *con)
2642{
2643 struct ceph_osd *o = con->private;
2644 struct ceph_osd_client *osdc = o->o_osdc;
2645 struct ceph_auth_client *ac = osdc->client->monc.auth;
2646
27859f97 2647 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2648 return ceph_monc_validate_auth(&osdc->client->monc);
2649}
4e7a5dcd 2650
9e32789f 2651static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2652 .get = get_osd_con,
2653 .put = put_osd_con,
2654 .dispatch = dispatch,
4e7a5dcd
SW		 2655 .get_authorizer = get_authorizer,
2656 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2657 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2658 .alloc_msg = alloc_msg,
81b024e7 2659 .fault = osd_reset,
f24e9980 2660};
kernel source for telekom puls (alcatel/mediatek)