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libceph: switch ceph_calc_pg_acting() to new helpers
[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 */
2d0ebc5d 341 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
1b83bef2
SW		 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
3c972c95 371 req->r_base_oloc.pool = -1;
205ee118 372 req->r_target_oloc.pool = -1;
22116525 373
c16e7869
SW		 374 /* create reply message */
375 if (use_mempool)
376 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
377 else
378 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
b61c2763 379 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
a79832f2 380 if (!msg) {
c16e7869 381 ceph_osdc_put_request(req);
a79832f2 382 return NULL;
c16e7869
SW		 383 }
384 req->r_reply = msg;
385
386 /* create request message; allow space for oid */
f24e9980 387 if (use_mempool)
8f3bc053 388 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 389 else
b61c2763 390 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
a79832f2 391 if (!msg) {
f24e9980 392 ceph_osdc_put_request(req);
a79832f2 393 return NULL;
f24e9980 394 }
68b4476b 395
f24e9980 396 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5
YS		 397
398 req->r_request = msg;
3499e8a5
YS		 399
400 return req;
401}
3d14c5d2 402EXPORT_SYMBOL(ceph_osdc_alloc_request);
3499e8a5 403
a8dd0a37 404static bool osd_req_opcode_valid(u16 opcode)
68b4476b 405{
a8dd0a37 406 switch (opcode) {
68b4476b 407 case CEPH_OSD_OP_READ:
a8dd0a37 408 case CEPH_OSD_OP_STAT:
4c46459c
AE		 409 case CEPH_OSD_OP_MAPEXT:
410 case CEPH_OSD_OP_MASKTRUNC:
411 case CEPH_OSD_OP_SPARSE_READ:
a9f36c3e 412 case CEPH_OSD_OP_NOTIFY:
a8dd0a37 413 case CEPH_OSD_OP_NOTIFY_ACK:
4c46459c 414 case CEPH_OSD_OP_ASSERT_VER:
a8dd0a37 415 case CEPH_OSD_OP_WRITE:
4c46459c
AE		 416 case CEPH_OSD_OP_WRITEFULL:
417 case CEPH_OSD_OP_TRUNCATE:
418 case CEPH_OSD_OP_ZERO:
419 case CEPH_OSD_OP_DELETE:
420 case CEPH_OSD_OP_APPEND:
a8dd0a37 421 case CEPH_OSD_OP_STARTSYNC:
4c46459c
AE		 422 case CEPH_OSD_OP_SETTRUNC:
423 case CEPH_OSD_OP_TRIMTRUNC:
424 case CEPH_OSD_OP_TMAPUP:
425 case CEPH_OSD_OP_TMAPPUT:
426 case CEPH_OSD_OP_TMAPGET:
427 case CEPH_OSD_OP_CREATE:
a9f36c3e 428 case CEPH_OSD_OP_ROLLBACK:
a8dd0a37 429 case CEPH_OSD_OP_WATCH:
4c46459c
AE		 430 case CEPH_OSD_OP_OMAPGETKEYS:
431 case CEPH_OSD_OP_OMAPGETVALS:
432 case CEPH_OSD_OP_OMAPGETHEADER:
433 case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
4c46459c
AE		 434 case CEPH_OSD_OP_OMAPSETVALS:
435 case CEPH_OSD_OP_OMAPSETHEADER:
436 case CEPH_OSD_OP_OMAPCLEAR:
437 case CEPH_OSD_OP_OMAPRMKEYS:
438 case CEPH_OSD_OP_OMAP_CMP:
c647b8a8 439 case CEPH_OSD_OP_SETALLOCHINT:
4c46459c
AE		 440 case CEPH_OSD_OP_CLONERANGE:
441 case CEPH_OSD_OP_ASSERT_SRC_VERSION:
442 case CEPH_OSD_OP_SRC_CMPXATTR:
a9f36c3e 443 case CEPH_OSD_OP_GETXATTR:
4c46459c 444 case CEPH_OSD_OP_GETXATTRS:
a9f36c3e
AE		 445 case CEPH_OSD_OP_CMPXATTR:
446 case CEPH_OSD_OP_SETXATTR:
4c46459c
AE		 447 case CEPH_OSD_OP_SETXATTRS:
448 case CEPH_OSD_OP_RESETXATTRS:
449 case CEPH_OSD_OP_RMXATTR:
450 case CEPH_OSD_OP_PULL:
451 case CEPH_OSD_OP_PUSH:
452 case CEPH_OSD_OP_BALANCEREADS:
453 case CEPH_OSD_OP_UNBALANCEREADS:
454 case CEPH_OSD_OP_SCRUB:
455 case CEPH_OSD_OP_SCRUB_RESERVE:
456 case CEPH_OSD_OP_SCRUB_UNRESERVE:
457 case CEPH_OSD_OP_SCRUB_STOP:
458 case CEPH_OSD_OP_SCRUB_MAP:
459 case CEPH_OSD_OP_WRLOCK:
460 case CEPH_OSD_OP_WRUNLOCK:
461 case CEPH_OSD_OP_RDLOCK:
462 case CEPH_OSD_OP_RDUNLOCK:
463 case CEPH_OSD_OP_UPLOCK:
464 case CEPH_OSD_OP_DNLOCK:
a8dd0a37 465 case CEPH_OSD_OP_CALL:
4c46459c
AE		 466 case CEPH_OSD_OP_PGLS:
467 case CEPH_OSD_OP_PGLS_FILTER:
a8dd0a37
AE		 468 return true;
469 default:
470 return false;
471 }
472}
473
33803f33
AE		 474/*
475 * This is an osd op init function for opcodes that have no data or
476 * other information associated with them. It also serves as a
477 * common init routine for all the other init functions, below.
478 */
c99d2d4a 479static struct ceph_osd_req_op *
49719778 480_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
c99d2d4a 481 u16 opcode)
33803f33 482{
c99d2d4a
AE		 483 struct ceph_osd_req_op *op;
484
485 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 486 BUG_ON(!osd_req_opcode_valid(opcode));
487
c99d2d4a 488 op = &osd_req->r_ops[which];
33803f33 489 memset(op, 0, sizeof (*op));
33803f33 490 op->op = opcode;
c99d2d4a
AE		 491
492 return op;
33803f33
AE		 493}
494
49719778
AE		 495void osd_req_op_init(struct ceph_osd_request *osd_req,
496 unsigned int which, u16 opcode)
497{
498 (void)_osd_req_op_init(osd_req, which, opcode);
499}
500EXPORT_SYMBOL(osd_req_op_init);
501
c99d2d4a
AE		 502void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
503 unsigned int which, u16 opcode,
33803f33
AE		 504 u64 offset, u64 length,
505 u64 truncate_size, u32 truncate_seq)
506{
49719778 507 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33
AE		 508 size_t payload_len = 0;
509
ad7a60de
LW		 510 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
511 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
512 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 513
33803f33
AE		 514 op->extent.offset = offset;
515 op->extent.length = length;
516 op->extent.truncate_size = truncate_size;
517 op->extent.truncate_seq = truncate_seq;
518 if (opcode == CEPH_OSD_OP_WRITE)
519 payload_len += length;
520
521 op->payload_len = payload_len;
522}
523EXPORT_SYMBOL(osd_req_op_extent_init);
524
c99d2d4a
AE		 525void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
526 unsigned int which, u64 length)
e5975c7c 527{
c99d2d4a
AE		 528 struct ceph_osd_req_op *op;
529 u64 previous;
530
531 BUG_ON(which >= osd_req->r_num_ops);
532 op = &osd_req->r_ops[which];
533 previous = op->extent.length;
e5975c7c
AE		 534
535 if (length == previous)
536 return; /* Nothing to do */
537 BUG_ON(length > previous);
538
539 op->extent.length = length;
540 op->payload_len -= previous - length;
541}
542EXPORT_SYMBOL(osd_req_op_extent_update);
543
c99d2d4a 544void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 545 u16 opcode, const char *class, const char *method)
33803f33 546{
49719778 547 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
5f562df5 548 struct ceph_pagelist *pagelist;
33803f33
AE		 549 size_t payload_len = 0;
550 size_t size;
551
552 BUG_ON(opcode != CEPH_OSD_OP_CALL);
553
5f562df5
AE		 554 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
555 BUG_ON(!pagelist);
556 ceph_pagelist_init(pagelist);
557
33803f33
AE		 558 op->cls.class_name = class;
559 size = strlen(class);
560 BUG_ON(size > (size_t) U8_MAX);
561 op->cls.class_len = size;
5f562df5 562 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 563 payload_len += size;
564
565 op->cls.method_name = method;
566 size = strlen(method);
567 BUG_ON(size > (size_t) U8_MAX);
568 op->cls.method_len = size;
5f562df5 569 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 570 payload_len += size;
571
a4ce40a9 572 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 573
33803f33
AE		 574 op->cls.argc = 0; /* currently unused */
575
576 op->payload_len = payload_len;
577}
578EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 579
c99d2d4a
AE		 580void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
581 unsigned int which, u16 opcode,
33803f33
AE		 582 u64 cookie, u64 version, int flag)
583{
49719778 584 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33 585
c99d2d4a 586 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 587
588 op->watch.cookie = cookie;
9ef1ee5a 589 op->watch.ver = version;
33803f33 590 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 591 op->watch.flag = (u8)1;
33803f33
AE		 592}
593EXPORT_SYMBOL(osd_req_op_watch_init);
594
c647b8a8
ID		 595void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
596 unsigned int which,
597 u64 expected_object_size,
598 u64 expected_write_size)
599{
600 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
601 CEPH_OSD_OP_SETALLOCHINT);
602
603 op->alloc_hint.expected_object_size = expected_object_size;
604 op->alloc_hint.expected_write_size = expected_write_size;
605
606 /*
607 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
608 * not worth a feature bit. Set FAILOK per-op flag to make
609 * sure older osds don't trip over an unsupported opcode.
610 */
611 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
612}
613EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
614
90af3602 615static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 616 struct ceph_osd_data *osd_data)
617{
618 u64 length = ceph_osd_data_length(osd_data);
619
620 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
621 BUG_ON(length > (u64) SIZE_MAX);
622 if (length)
90af3602 623 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 624 length, osd_data->alignment);
625 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
626 BUG_ON(!length);
90af3602 627 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 628#ifdef CONFIG_BLOCK
629 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 630 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 631#endif
632 } else {
633 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
634 }
635}
636
a8dd0a37 637static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 638 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 639{
79528734 640 struct ceph_osd_req_op *src;
04017e29 641 struct ceph_osd_data *osd_data;
54d50649 642 u64 request_data_len = 0;
04017e29 643 u64 data_length;
a8dd0a37 644
79528734
AE		 645 BUG_ON(which >= req->r_num_ops);
646 src = &req->r_ops[which];
a8dd0a37
AE		 647 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
648 pr_err("unrecognized osd opcode %d\n", src->op);
649
650 return 0;
651 }
652
653 switch (src->op) {
654 case CEPH_OSD_OP_STAT:
49719778
AE		 655 osd_data = &src->raw_data_in;
656 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 657 break;
658 case CEPH_OSD_OP_READ:
659 case CEPH_OSD_OP_WRITE:
ad7a60de
LW		 660 case CEPH_OSD_OP_ZERO:
661 case CEPH_OSD_OP_DELETE:
662 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37 663 if (src->op == CEPH_OSD_OP_WRITE)
54d50649 664 request_data_len = src->extent.length;
a8dd0a37
AE		 665 dst->extent.offset = cpu_to_le64(src->extent.offset);
666 dst->extent.length = cpu_to_le64(src->extent.length);
667 dst->extent.truncate_size =
668 cpu_to_le64(src->extent.truncate_size);
669 dst->extent.truncate_seq =
670 cpu_to_le32(src->extent.truncate_seq);
04017e29 671 osd_data = &src->extent.osd_data;
5476492f 672 if (src->op == CEPH_OSD_OP_WRITE)
04017e29 673 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 674 else
04017e29 675 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 676 break;
677 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 678 dst->cls.class_len = src->cls.class_len;
679 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 680 osd_data = &src->cls.request_info;
681 ceph_osdc_msg_data_add(req->r_request, osd_data);
682 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
683 request_data_len = osd_data->pagelist->length;
684
685 osd_data = &src->cls.request_data;
686 data_length = ceph_osd_data_length(osd_data);
687 if (data_length) {
688 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
689 dst->cls.indata_len = cpu_to_le32(data_length);
690 ceph_osdc_msg_data_add(req->r_request, osd_data);
691 src->payload_len += data_length;
692 request_data_len += data_length;
693 }
694 osd_data = &src->cls.response_data;
695 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 696 break;
697 case CEPH_OSD_OP_STARTSYNC:
698 break;
699 case CEPH_OSD_OP_NOTIFY_ACK:
700 case CEPH_OSD_OP_WATCH:
701 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
702 dst->watch.ver = cpu_to_le64(src->watch.ver);
703 dst->watch.flag = src->watch.flag;
704 break;
c647b8a8
ID		 705 case CEPH_OSD_OP_SETALLOCHINT:
706 dst->alloc_hint.expected_object_size =
707 cpu_to_le64(src->alloc_hint.expected_object_size);
708 dst->alloc_hint.expected_write_size =
709 cpu_to_le64(src->alloc_hint.expected_write_size);
710 break;
a8dd0a37 711 default:
4c46459c 712 pr_err("unsupported osd opcode %s\n",
8f63ca2d 713 ceph_osd_op_name(src->op));
4c46459c 714 WARN_ON(1);
a8dd0a37
AE		 715
716 return 0;
68b4476b 717 }
7b25bf5f 718
a8dd0a37 719 dst->op = cpu_to_le16(src->op);
7b25bf5f 720 dst->flags = cpu_to_le32(src->flags);
68b4476b 721 dst->payload_len = cpu_to_le32(src->payload_len);
175face2 722
54d50649 723 return request_data_len;
68b4476b
YS		 724}
725
3499e8a5
YS		 726/*
727 * build new request AND message, calculate layout, and adjust file
728 * extent as needed.
729 *
730 * if the file was recently truncated, we include information about its
731 * old and new size so that the object can be updated appropriately. (we
732 * avoid synchronously deleting truncated objects because it's slow.)
733 *
734 * if @do_sync, include a 'startsync' command so that the osd will flush
735 * data quickly.
736 */
737struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
738 struct ceph_file_layout *layout,
739 struct ceph_vino vino,
acead002 740 u64 off, u64 *plen, int num_ops,
3499e8a5
YS		 741 int opcode, int flags,
742 struct ceph_snap_context *snapc,
3499e8a5
YS		 743 u32 truncate_seq,
744 u64 truncate_size,
153e5167 745 bool use_mempool)
3499e8a5 746{
68b4476b 747 struct ceph_osd_request *req;
75d1c941
AE		 748 u64 objnum = 0;
749 u64 objoff = 0;
750 u64 objlen = 0;
d18d1e28
AE		 751 u32 object_size;
752 u64 object_base;
6816282d 753 int r;
68b4476b 754
ad7a60de
LW		 755 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
756 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
757 opcode != CEPH_OSD_OP_TRUNCATE);
68b4476b 758
acead002 759 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 760 GFP_NOFS);
4ad12621 761 if (!req)
6816282d 762 return ERR_PTR(-ENOMEM);
79528734 763
d178a9e7 764 req->r_flags = flags;
3499e8a5
YS		 765
766 /* calculate max write size */
a19dadfb 767 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 768 if (r < 0) {
769 ceph_osdc_put_request(req);
6816282d 770 return ERR_PTR(r);
3ff5f385 771 }
a19dadfb 772
d18d1e28
AE		 773 object_size = le32_to_cpu(layout->fl_object_size);
774 object_base = off - objoff;
ccca4e37
YZ		 775 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
776 if (truncate_size <= object_base) {
777 truncate_size = 0;
778 } else {
779 truncate_size -= object_base;
780 if (truncate_size > object_size)
781 truncate_size = object_size;
782 }
a19dadfb 783 }
d18d1e28 784
c99d2d4a 785 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
b0270324 786 truncate_size, truncate_seq);
8c042b0d 787
acead002
AE		 788 /*
789 * A second op in the ops array means the caller wants to
790 * also issue a include a 'startsync' command so that the
791 * osd will flush data quickly.
792 */
793 if (num_ops > 1)
c99d2d4a 794 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
d18d1e28 795
3c972c95 796 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
3499e8a5 797
3c972c95 798 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
4295f221 799 "%llx.%08llx", vino.ino, objnum);
3c972c95 800 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
dbe0fc41 801
f24e9980
SW		 802 return req;
803}
3d14c5d2 804EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 805
806/*
807 * We keep osd requests in an rbtree, sorted by ->r_tid.
808 */
809static void __insert_request(struct ceph_osd_client *osdc,
810 struct ceph_osd_request *new)
811{
812 struct rb_node **p = &osdc->requests.rb_node;
813 struct rb_node *parent = NULL;
814 struct ceph_osd_request *req = NULL;
815
816 while (*p) {
817 parent = *p;
818 req = rb_entry(parent, struct ceph_osd_request, r_node);
819 if (new->r_tid < req->r_tid)
820 p = &(*p)->rb_left;
821 else if (new->r_tid > req->r_tid)
822 p = &(*p)->rb_right;
823 else
824 BUG();
825 }
826
827 rb_link_node(&new->r_node, parent, p);
828 rb_insert_color(&new->r_node, &osdc->requests);
829}
830
831static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
832 u64 tid)
833{
834 struct ceph_osd_request *req;
835 struct rb_node *n = osdc->requests.rb_node;
836
837 while (n) {
838 req = rb_entry(n, struct ceph_osd_request, r_node);
839 if (tid < req->r_tid)
840 n = n->rb_left;
841 else if (tid > req->r_tid)
842 n = n->rb_right;
843 else
844 return req;
845 }
846 return NULL;
847}
848
849static struct ceph_osd_request *
850__lookup_request_ge(struct ceph_osd_client *osdc,
851 u64 tid)
852{
853 struct ceph_osd_request *req;
854 struct rb_node *n = osdc->requests.rb_node;
855
856 while (n) {
857 req = rb_entry(n, struct ceph_osd_request, r_node);
858 if (tid < req->r_tid) {
859 if (!n->rb_left)
860 return req;
861 n = n->rb_left;
862 } else if (tid > req->r_tid) {
863 n = n->rb_right;
864 } else {
865 return req;
866 }
867 }
868 return NULL;
869}
870
6f6c7006
SW		 871/*
872 * Resubmit requests pending on the given osd.
873 */
874static void __kick_osd_requests(struct ceph_osd_client *osdc,
875 struct ceph_osd *osd)
876{
a40c4f10 877 struct ceph_osd_request *req, *nreq;
e02493c0 878 LIST_HEAD(resend);
6f6c7006
SW		 879 int err;
880
881 dout("__kick_osd_requests osd%d\n", osd->o_osd);
882 err = __reset_osd(osdc, osd);
685a7555 883 if (err)
6f6c7006 884 return;
e02493c0
AE		 885 /*
886 * Build up a list of requests to resend by traversing the
887 * osd's list of requests. Requests for a given object are
888 * sent in tid order, and that is also the order they're
889 * kept on this list. Therefore all requests that are in
890 * flight will be found first, followed by all requests that
891 * have not yet been sent. And to resend requests while
892 * preserving this order we will want to put any sent
893 * requests back on the front of the osd client's unsent
894 * list.
895 *
896 * So we build a separate ordered list of already-sent
897 * requests for the affected osd and splice it onto the
898 * front of the osd client's unsent list. Once we've seen a
899 * request that has not yet been sent we're done. Those
900 * requests are already sitting right where they belong.
901 */
6f6c7006 902 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 903 if (!req->r_sent)
904 break;
905 list_move_tail(&req->r_req_lru_item, &resend);
906 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
6f6c7006 907 osd->o_osd);
a40c4f10
YS		 908 if (!req->r_linger)
909 req->r_flags |= CEPH_OSD_FLAG_RETRY;
910 }
e02493c0 911 list_splice(&resend, &osdc->req_unsent);
a40c4f10 912
e02493c0
AE		 913 /*
914 * Linger requests are re-registered before sending, which
915 * sets up a new tid for each. We add them to the unsent
916 * list at the end to keep things in tid order.
917 */
a40c4f10
YS		 918 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
919 r_linger_osd) {
77f38e0e
SW		 920 /*
921 * reregister request prior to unregistering linger so
922 * that r_osd is preserved.
923 */
924 BUG_ON(!list_empty(&req->r_req_lru_item));
a40c4f10 925 __register_request(osdc, req);
e02493c0 926 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
ad885927 927 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
77f38e0e 928 __unregister_linger_request(osdc, req);
a40c4f10
YS		 929 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
930 osd->o_osd);
6f6c7006
SW		 931 }
932}
933
f24e9980 934/*
81b024e7 935 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 936 */
937static void osd_reset(struct ceph_connection *con)
938{
939 struct ceph_osd *osd = con->private;
940 struct ceph_osd_client *osdc;
941
942 if (!osd)
943 return;
944 dout("osd_reset osd%d\n", osd->o_osd);
945 osdc = osd->o_osdc;
f24e9980 946 down_read(&osdc->map_sem);
83aff95e
SW		 947 mutex_lock(&osdc->request_mutex);
948 __kick_osd_requests(osdc, osd);
f9d25199 949 __send_queued(osdc);
83aff95e 950 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 951 up_read(&osdc->map_sem);
952}
953
954/*
955 * Track open sessions with osds.
956 */
e10006f8 957static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 958{
959 struct ceph_osd *osd;
960
961 osd = kzalloc(sizeof(*osd), GFP_NOFS);
962 if (!osd)
963 return NULL;
964
965 atomic_set(&osd->o_ref, 1);
966 osd->o_osdc = osdc;
e10006f8 967 osd->o_osd = onum;
f407731d 968 RB_CLEAR_NODE(&osd->o_node);
f24e9980 969 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 970 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 971 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 972 osd->o_incarnation = 1;
973
b7a9e5dd 974 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 975
422d2cb8 976 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 977 return osd;
978}
979
980static struct ceph_osd *get_osd(struct ceph_osd *osd)
981{
982 if (atomic_inc_not_zero(&osd->o_ref)) {
983 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
984 atomic_read(&osd->o_ref));
985 return osd;
986 } else {
987 dout("get_osd %p FAIL\n", osd);
988 return NULL;
989 }
990}
991
992static void put_osd(struct ceph_osd *osd)
993{
994 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
995 atomic_read(&osd->o_ref) - 1);
a255651d 996 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
79494d1b
SW		 997 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
998
27859f97 999 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 1000 kfree(osd);
79494d1b 1001 }
f24e9980
SW		 1002}
1003
1004/*
1005 * remove an osd from our map
1006 */
f5a2041b 1007static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1008{
f5a2041b 1009 dout("__remove_osd %p\n", osd);
f24e9980
SW		 1010 BUG_ON(!list_empty(&osd->o_requests));
1011 rb_erase(&osd->o_node, &osdc->osds);
f5a2041b 1012 list_del_init(&osd->o_osd_lru);
f24e9980
SW		 1013 ceph_con_close(&osd->o_con);
1014 put_osd(osd);
1015}
1016
aca420bc
SW		 1017static void remove_all_osds(struct ceph_osd_client *osdc)
1018{
048a9d2d 1019 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 1020 mutex_lock(&osdc->request_mutex);
1021 while (!RB_EMPTY_ROOT(&osdc->osds)) {
1022 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
1023 struct ceph_osd, o_node);
1024 __remove_osd(osdc, osd);
1025 }
1026 mutex_unlock(&osdc->request_mutex);
1027}
1028
f5a2041b
YS		 1029static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1030 struct ceph_osd *osd)
1031{
1032 dout("__move_osd_to_lru %p\n", osd);
1033 BUG_ON(!list_empty(&osd->o_osd_lru));
1034 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
3d14c5d2 1035 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
f5a2041b
YS		 1036}
1037
1038static void __remove_osd_from_lru(struct ceph_osd *osd)
1039{
1040 dout("__remove_osd_from_lru %p\n", osd);
1041 if (!list_empty(&osd->o_osd_lru))
1042 list_del_init(&osd->o_osd_lru);
1043}
1044
aca420bc 1045static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1046{
1047 struct ceph_osd *osd, *nosd;
1048
1049 dout("__remove_old_osds %p\n", osdc);
1050 mutex_lock(&osdc->request_mutex);
1051 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1052 if (time_before(jiffies, osd->lru_ttl))
f5a2041b
YS		 1053 break;
1054 __remove_osd(osdc, osd);
1055 }
1056 mutex_unlock(&osdc->request_mutex);
1057}
1058
f24e9980
SW		 1059/*
1060 * reset osd connect
1061 */
f5a2041b 1062static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1063{
c3acb181 1064 struct ceph_entity_addr *peer_addr;
f24e9980 1065
f5a2041b 1066 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1067 if (list_empty(&osd->o_requests) &&
1068 list_empty(&osd->o_linger_requests)) {
f5a2041b 1069 __remove_osd(osdc, osd);
c3acb181
AE		 1070
1071 return -ENODEV;
1072 }
1073
1074 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1075 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1076 !ceph_con_opened(&osd->o_con)) {
1077 struct ceph_osd_request *req;
1078
0b4af2e8
ID		 1079 dout("osd addr hasn't changed and connection never opened, "
1080 "letting msgr retry\n");
87b315a5
SW		 1081 /* touch each r_stamp for handle_timeout()'s benfit */
1082 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1083 req->r_stamp = jiffies;
c3acb181
AE		 1084
1085 return -EAGAIN;
f24e9980 1086 }
c3acb181
AE		 1087
1088 ceph_con_close(&osd->o_con);
1089 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1090 osd->o_incarnation++;
1091
1092 return 0;
f24e9980
SW		 1093}
1094
1095static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1096{
1097 struct rb_node **p = &osdc->osds.rb_node;
1098 struct rb_node *parent = NULL;
1099 struct ceph_osd *osd = NULL;
1100
aca420bc 1101 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1102 while (*p) {
1103 parent = *p;
1104 osd = rb_entry(parent, struct ceph_osd, o_node);
1105 if (new->o_osd < osd->o_osd)
1106 p = &(*p)->rb_left;
1107 else if (new->o_osd > osd->o_osd)
1108 p = &(*p)->rb_right;
1109 else
1110 BUG();
1111 }
1112
1113 rb_link_node(&new->o_node, parent, p);
1114 rb_insert_color(&new->o_node, &osdc->osds);
1115}
1116
1117static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1118{
1119 struct ceph_osd *osd;
1120 struct rb_node *n = osdc->osds.rb_node;
1121
1122 while (n) {
1123 osd = rb_entry(n, struct ceph_osd, o_node);
1124 if (o < osd->o_osd)
1125 n = n->rb_left;
1126 else if (o > osd->o_osd)
1127 n = n->rb_right;
1128 else
1129 return osd;
1130 }
1131 return NULL;
1132}
1133
422d2cb8
YS		 1134static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1135{
1136 schedule_delayed_work(&osdc->timeout_work,
3d14c5d2 1137 osdc->client->options->osd_keepalive_timeout * HZ);
422d2cb8
YS		 1138}
1139
1140static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1141{
1142 cancel_delayed_work(&osdc->timeout_work);
1143}
f24e9980
SW		 1144
1145/*
1146 * Register request, assign tid. If this is the first request, set up
1147 * the timeout event.
1148 */
a40c4f10
YS		 1149static void __register_request(struct ceph_osd_client *osdc,
1150 struct ceph_osd_request *req)
f24e9980 1151{
f24e9980 1152 req->r_tid = ++osdc->last_tid;
6df058c0 1153 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1154 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1155 __insert_request(osdc, req);
1156 ceph_osdc_get_request(req);
1157 osdc->num_requests++;
f24e9980 1158 if (osdc->num_requests == 1) {
422d2cb8
YS		 1159 dout(" first request, scheduling timeout\n");
1160 __schedule_osd_timeout(osdc);
f24e9980 1161 }
a40c4f10
YS		 1162}
1163
f24e9980
SW		 1164/*
1165 * called under osdc->request_mutex
1166 */
1167static void __unregister_request(struct ceph_osd_client *osdc,
1168 struct ceph_osd_request *req)
1169{
35f9f8a0
SW		 1170 if (RB_EMPTY_NODE(&req->r_node)) {
1171 dout("__unregister_request %p tid %lld not registered\n",
1172 req, req->r_tid);
1173 return;
1174 }
1175
f24e9980
SW		 1176 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1177 rb_erase(&req->r_node, &osdc->requests);
1178 osdc->num_requests--;
1179
0ba6478d
SW		 1180 if (req->r_osd) {
1181 /* make sure the original request isn't in flight. */
6740a845 1182 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1183
1184 list_del_init(&req->r_osd_item);
a40c4f10
YS		 1185 if (list_empty(&req->r_osd->o_requests) &&
1186 list_empty(&req->r_osd->o_linger_requests)) {
1187 dout("moving osd to %p lru\n", req->r_osd);
f5a2041b 1188 __move_osd_to_lru(osdc, req->r_osd);
a40c4f10 1189 }
fbdb9190 1190 if (list_empty(&req->r_linger_item))
a40c4f10 1191 req->r_osd = NULL;
0ba6478d 1192 }
f24e9980 1193
7d5f2481 1194 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1195 ceph_osdc_put_request(req);
1196
422d2cb8
YS		 1197 if (osdc->num_requests == 0) {
1198 dout(" no requests, canceling timeout\n");
1199 __cancel_osd_timeout(osdc);
f24e9980
SW		 1200 }
1201}
1202
1203/*
1204 * Cancel a previously queued request message
1205 */
1206static void __cancel_request(struct ceph_osd_request *req)
1207{
6bc18876 1208 if (req->r_sent && req->r_osd) {
6740a845 1209 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1210 req->r_sent = 0;
1211 }
1212}
1213
a40c4f10
YS		 1214static void __register_linger_request(struct ceph_osd_client *osdc,
1215 struct ceph_osd_request *req)
1216{
1217 dout("__register_linger_request %p\n", req);
96e4dac6 1218 ceph_osdc_get_request(req);
a40c4f10 1219 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89
SW		 1220 if (req->r_osd)
1221 list_add_tail(&req->r_linger_osd,
1222 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1223}
1224
1225static void __unregister_linger_request(struct ceph_osd_client *osdc,
1226 struct ceph_osd_request *req)
1227{
1228 dout("__unregister_linger_request %p\n", req);
61c74035 1229 list_del_init(&req->r_linger_item);
a40c4f10 1230 if (req->r_osd) {
a40c4f10
YS		 1231 list_del_init(&req->r_linger_osd);
1232
1233 if (list_empty(&req->r_osd->o_requests) &&
1234 list_empty(&req->r_osd->o_linger_requests)) {
1235 dout("moving osd to %p lru\n", req->r_osd);
1236 __move_osd_to_lru(osdc, req->r_osd);
1237 }
fbdb9190
SW		 1238 if (list_empty(&req->r_osd_item))
1239 req->r_osd = NULL;
a40c4f10 1240 }
96e4dac6 1241 ceph_osdc_put_request(req);
a40c4f10
YS		 1242}
1243
1244void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1245 struct ceph_osd_request *req)
1246{
1247 mutex_lock(&osdc->request_mutex);
1248 if (req->r_linger) {
c10ebbf5 1249 req->r_linger = 0;
96e4dac6 1250 __unregister_linger_request(osdc, req);
a40c4f10
YS		 1251 }
1252 mutex_unlock(&osdc->request_mutex);
1253}
1254EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1255
1256void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1257 struct ceph_osd_request *req)
1258{
1259 if (!req->r_linger) {
1260 dout("set_request_linger %p\n", req);
1261 req->r_linger = 1;
a40c4f10
YS		 1262 }
1263}
1264EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1265
d29adb34
JD		 1266/*
1267 * Returns whether a request should be blocked from being sent
1268 * based on the current osdmap and osd_client settings.
1269 *
1270 * Caller should hold map_sem for read.
1271 */
1272static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1273 struct ceph_osd_request *req)
1274{
1275 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1276 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1277 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1278 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1279 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1280}
1281
17a13e40
ID		 1282/*
1283 * Calculate mapping of a request to a PG. Takes tiering into account.
1284 */
1285static int __calc_request_pg(struct ceph_osdmap *osdmap,
1286 struct ceph_osd_request *req,
1287 struct ceph_pg *pg_out)
1288{
205ee118
ID		 1289 bool need_check_tiering;
1290
1291 need_check_tiering = false;
1292 if (req->r_target_oloc.pool == -1) {
1293 req->r_target_oloc = req->r_base_oloc; /* struct */
1294 need_check_tiering = true;
1295 }
1296 if (req->r_target_oid.name_len == 0) {
1297 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1298 need_check_tiering = true;
1299 }
1300
1301 if (need_check_tiering &&
1302 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
17a13e40
ID		 1303 struct ceph_pg_pool_info *pi;
1304
205ee118 1305 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
17a13e40
ID		 1306 if (pi) {
1307 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1308 pi->read_tier >= 0)
205ee118 1309 req->r_target_oloc.pool = pi->read_tier;
17a13e40
ID		 1310 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1311 pi->write_tier >= 0)
205ee118 1312 req->r_target_oloc.pool = pi->write_tier;
17a13e40
ID		 1313 }
1314 /* !pi is caught in ceph_oloc_oid_to_pg() */
1315 }
1316
205ee118
ID		 1317 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1318 &req->r_target_oid, pg_out);
17a13e40
ID		 1319}
1320
f24e9980
SW		 1321/*
1322 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1323 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1324 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1325 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1326 *
1327 * Return 0 if unchanged, 1 if changed, or negative on error.
1328 *
1329 * Caller should hold map_sem for read and request_mutex.
1330 */
6f6c7006 1331static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1332 struct ceph_osd_request *req, int force_resend)
f24e9980 1333{
5b191d99 1334 struct ceph_pg pgid;
d85b7056
SW		 1335 int acting[CEPH_PG_MAX_SIZE];
1336 int o = -1, num = 0;
f24e9980 1337 int err;
d29adb34 1338 bool was_paused;
f24e9980 1339
6f6c7006 1340 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40
ID		 1341
1342 err = __calc_request_pg(osdc->osdmap, req, &pgid);
6f6c7006
SW		 1343 if (err) {
1344 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1345 return err;
6f6c7006 1346 }
7740a42f
SW		 1347 req->r_pgid = pgid;
1348
d85b7056
SW		 1349 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1350 if (err > 0) {
1351 o = acting[0];
1352 num = err;
1353 }
f24e9980 1354
d29adb34
JD		 1355 was_paused = req->r_paused;
1356 req->r_paused = __req_should_be_paused(osdc, req);
1357 if (was_paused && !req->r_paused)
1358 force_resend = 1;
1359
38d6453c
SW		 1360 if ((!force_resend &&
1361 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1362 req->r_sent >= req->r_osd->o_incarnation &&
1363 req->r_num_pg_osds == num &&
1364 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
d29adb34
JD		 1365 (req->r_osd == NULL && o == -1) ||
1366 req->r_paused)
f24e9980
SW		 1367 return 0; /* no change */
1368
5b191d99
SW		 1369 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1370 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1371 req->r_osd ? req->r_osd->o_osd : -1);
1372
d85b7056
SW		 1373 /* record full pg acting set */
1374 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1375 req->r_num_pg_osds = num;
1376
f24e9980
SW		 1377 if (req->r_osd) {
1378 __cancel_request(req);
1379 list_del_init(&req->r_osd_item);
f24e9980
SW		 1380 req->r_osd = NULL;
1381 }
1382
1383 req->r_osd = __lookup_osd(osdc, o);
1384 if (!req->r_osd && o >= 0) {
c99eb1c7 1385 err = -ENOMEM;
e10006f8 1386 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1387 if (!req->r_osd) {
1388 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1389 goto out;
6f6c7006 1390 }
f24e9980 1391
6f6c7006 1392 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1393 __insert_osd(osdc, req->r_osd);
1394
b7a9e5dd
SW		 1395 ceph_con_open(&req->r_osd->o_con,
1396 CEPH_ENTITY_TYPE_OSD, o,
1397 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1398 }
1399
f5a2041b
YS		 1400 if (req->r_osd) {
1401 __remove_osd_from_lru(req->r_osd);
ad885927
AE		 1402 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1403 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
6f6c7006 1404 } else {
ad885927 1405 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
f5a2041b 1406 }
d85b7056 1407 err = 1; /* osd or pg changed */
f24e9980
SW		 1408
1409out:
f24e9980
SW		 1410 return err;
1411}
1412
1413/*
1414 * caller should hold map_sem (for read) and request_mutex
1415 */
56e925b6
SW		 1416static void __send_request(struct ceph_osd_client *osdc,
1417 struct ceph_osd_request *req)
f24e9980 1418{
1b83bef2 1419 void *p;
f24e9980 1420
1b83bef2
SW		 1421 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1422 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1423 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1424
1425 /* fill in message content that changes each time we send it */
1426 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1427 put_unaligned_le32(req->r_flags, req->r_request_flags);
205ee118 1428 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1b83bef2
SW		 1429 p = req->r_request_pgid;
1430 ceph_encode_64(&p, req->r_pgid.pool);
1431 ceph_encode_32(&p, req->r_pgid.seed);
1432 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1433 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1434 sizeof(req->r_reassert_version));
2169aea6 1435
3dd72fc0 1436 req->r_stamp = jiffies;
07a27e22 1437 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1438
1439 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1440
f24e9980 1441 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1442
1443 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1444}
1445
6f6c7006
SW		 1446/*
1447 * Send any requests in the queue (req_unsent).
1448 */
f9d25199 1449static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1450{
1451 struct ceph_osd_request *req, *tmp;
1452
f9d25199
AE		 1453 dout("__send_queued\n");
1454 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1455 __send_request(osdc, req);
6f6c7006
SW		 1456}
1457
0bbfdfe8
ID		 1458/*
1459 * Caller should hold map_sem for read and request_mutex.
1460 */
1461static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1462 struct ceph_osd_request *req,
1463 bool nofail)
1464{
1465 int rc;
1466
1467 __register_request(osdc, req);
1468 req->r_sent = 0;
1469 req->r_got_reply = 0;
1470 rc = __map_request(osdc, req, 0);
1471 if (rc < 0) {
1472 if (nofail) {
1473 dout("osdc_start_request failed map, "
1474 " will retry %lld\n", req->r_tid);
1475 rc = 0;
1476 } else {
1477 __unregister_request(osdc, req);
1478 }
1479 return rc;
1480 }
1481
1482 if (req->r_osd == NULL) {
1483 dout("send_request %p no up osds in pg\n", req);
1484 ceph_monc_request_next_osdmap(&osdc->client->monc);
1485 } else {
1486 __send_queued(osdc);
1487 }
1488
1489 return 0;
1490}
1491
f24e9980
SW		 1492/*
1493 * Timeout callback, called every N seconds when 1 or more osd
1494 * requests has been active for more than N seconds. When this
1495 * happens, we ping all OSDs with requests who have timed out to
1496 * ensure any communications channel reset is detected. Reset the
1497 * request timeouts another N seconds in the future as we go.
1498 * Reschedule the timeout event another N seconds in future (unless
1499 * there are no open requests).
1500 */
1501static void handle_timeout(struct work_struct *work)
1502{
1503 struct ceph_osd_client *osdc =
1504 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1505 struct ceph_osd_request *req;
f24e9980 1506 struct ceph_osd *osd;
422d2cb8 1507 unsigned long keepalive =
3d14c5d2 1508 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1509 struct list_head slow_osds;
f24e9980
SW		 1510 dout("timeout\n");
1511 down_read(&osdc->map_sem);
1512
1513 ceph_monc_request_next_osdmap(&osdc->client->monc);
1514
1515 mutex_lock(&osdc->request_mutex);
f24e9980 1516
422d2cb8
YS		 1517 /*
1518 * ping osds that are a bit slow. this ensures that if there
1519 * is a break in the TCP connection we will notice, and reopen
1520 * a connection with that osd (from the fault callback).
1521 */
1522 INIT_LIST_HEAD(&slow_osds);
1523 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1524 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1525 break;
1526
1527 osd = req->r_osd;
1528 BUG_ON(!osd);
1529 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1530 req->r_tid, osd->o_osd);
422d2cb8
YS		 1531 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1532 }
1533 while (!list_empty(&slow_osds)) {
1534 osd = list_entry(slow_osds.next, struct ceph_osd,
1535 o_keepalive_item);
1536 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1537 ceph_con_keepalive(&osd->o_con);
1538 }
1539
422d2cb8 1540 __schedule_osd_timeout(osdc);
f9d25199 1541 __send_queued(osdc);
f24e9980 1542 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1543 up_read(&osdc->map_sem);
1544}
1545
f5a2041b
YS		 1546static void handle_osds_timeout(struct work_struct *work)
1547{
1548 struct ceph_osd_client *osdc =
1549 container_of(work, struct ceph_osd_client,
1550 osds_timeout_work.work);
1551 unsigned long delay =
3d14c5d2 1552 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1553
1554 dout("osds timeout\n");
1555 down_read(&osdc->map_sem);
aca420bc 1556 remove_old_osds(osdc);
f5a2041b
YS		 1557 up_read(&osdc->map_sem);
1558
1559 schedule_delayed_work(&osdc->osds_timeout_work,
1560 round_jiffies_relative(delay));
1561}
1562
205ee118
ID		 1563static int ceph_oloc_decode(void **p, void *end,
1564 struct ceph_object_locator *oloc)
1565{
1566 u8 struct_v, struct_cv;
1567 u32 len;
1568 void *struct_end;
1569 int ret = 0;
1570
1571 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1572 struct_v = ceph_decode_8(p);
1573 struct_cv = ceph_decode_8(p);
1574 if (struct_v < 3) {
1575 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1576 struct_v, struct_cv);
1577 goto e_inval;
1578 }
1579 if (struct_cv > 6) {
1580 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1581 struct_v, struct_cv);
1582 goto e_inval;
1583 }
1584 len = ceph_decode_32(p);
1585 ceph_decode_need(p, end, len, e_inval);
1586 struct_end = *p + len;
1587
1588 oloc->pool = ceph_decode_64(p);
1589 *p += 4; /* skip preferred */
1590
1591 len = ceph_decode_32(p);
1592 if (len > 0) {
1593 pr_warn("ceph_object_locator::key is set\n");
1594 goto e_inval;
1595 }
1596
1597 if (struct_v >= 5) {
1598 len = ceph_decode_32(p);
1599 if (len > 0) {
1600 pr_warn("ceph_object_locator::nspace is set\n");
1601 goto e_inval;
1602 }
1603 }
1604
1605 if (struct_v >= 6) {
1606 s64 hash = ceph_decode_64(p);
1607 if (hash != -1) {
1608 pr_warn("ceph_object_locator::hash is set\n");
1609 goto e_inval;
1610 }
1611 }
1612
1613 /* skip the rest */
1614 *p = struct_end;
1615out:
1616 return ret;
1617
1618e_inval:
1619 ret = -EINVAL;
1620 goto out;
1621}
1622
1623static int ceph_redirect_decode(void **p, void *end,
1624 struct ceph_request_redirect *redir)
1625{
1626 u8 struct_v, struct_cv;
1627 u32 len;
1628 void *struct_end;
1629 int ret;
1630
1631 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1632 struct_v = ceph_decode_8(p);
1633 struct_cv = ceph_decode_8(p);
1634 if (struct_cv > 1) {
1635 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1636 struct_v, struct_cv);
1637 goto e_inval;
1638 }
1639 len = ceph_decode_32(p);
1640 ceph_decode_need(p, end, len, e_inval);
1641 struct_end = *p + len;
1642
1643 ret = ceph_oloc_decode(p, end, &redir->oloc);
1644 if (ret)
1645 goto out;
1646
1647 len = ceph_decode_32(p);
1648 if (len > 0) {
1649 pr_warn("ceph_request_redirect::object_name is set\n");
1650 goto e_inval;
1651 }
1652
1653 len = ceph_decode_32(p);
1654 *p += len; /* skip osd_instructions */
1655
1656 /* skip the rest */
1657 *p = struct_end;
1658out:
1659 return ret;
1660
1661e_inval:
1662 ret = -EINVAL;
1663 goto out;
1664}
1665
25845472
SW		 1666static void complete_request(struct ceph_osd_request *req)
1667{
25845472
SW		 1668 complete_all(&req->r_safe_completion); /* fsync waiter */
1669}
1670
f24e9980
SW		 1671/*
1672 * handle osd op reply. either call the callback if it is specified,
1673 * or do the completion to wake up the waiting thread.
1674 */
350b1c32
SW		 1675static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1676 struct ceph_connection *con)
f24e9980 1677{
1b83bef2 1678 void *p, *end;
f24e9980 1679 struct ceph_osd_request *req;
205ee118 1680 struct ceph_request_redirect redir;
f24e9980 1681 u64 tid;
1b83bef2 1682 int object_len;
79528734
AE		 1683 unsigned int numops;
1684 int payload_len, flags;
0ceed5db 1685 s32 result;
1b83bef2
SW		 1686 s32 retry_attempt;
1687 struct ceph_pg pg;
1688 int err;
1689 u32 reassert_epoch;
1690 u64 reassert_version;
1691 u32 osdmap_epoch;
0d5af164 1692 int already_completed;
9fc6e064 1693 u32 bytes;
79528734 1694 unsigned int i;
f24e9980 1695
6df058c0 1696 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1697 dout("handle_reply %p tid %llu\n", msg, tid);
1698
1699 p = msg->front.iov_base;
1700 end = p + msg->front.iov_len;
1701
1702 ceph_decode_need(&p, end, 4, bad);
1703 object_len = ceph_decode_32(&p);
1704 ceph_decode_need(&p, end, object_len, bad);
1705 p += object_len;
1706
ef4859d6 1707 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1708 if (err)
f24e9980 1709 goto bad;
1b83bef2
SW		 1710
1711 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1712 flags = ceph_decode_64(&p);
1713 result = ceph_decode_32(&p);
1714 reassert_epoch = ceph_decode_32(&p);
1715 reassert_version = ceph_decode_64(&p);
1716 osdmap_epoch = ceph_decode_32(&p);
1717
f24e9980 1718 /* lookup */
ff513ace 1719 down_read(&osdc->map_sem);
f24e9980
SW		 1720 mutex_lock(&osdc->request_mutex);
1721 req = __lookup_request(osdc, tid);
1722 if (req == NULL) {
1723 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1724 goto bad_mutex;
f24e9980
SW		 1725 }
1726 ceph_osdc_get_request(req);
1b83bef2
SW		 1727
1728 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1729 req, result);
1730
18741196 1731 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2
SW		 1732 numops = ceph_decode_32(&p);
1733 if (numops > CEPH_OSD_MAX_OP)
1734 goto bad_put;
1735 if (numops != req->r_num_ops)
1736 goto bad_put;
1737 payload_len = 0;
18741196 1738 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1739 for (i = 0; i < numops; i++) {
1740 struct ceph_osd_op *op = p;
1741 int len;
1742
1743 len = le32_to_cpu(op->payload_len);
1744 req->r_reply_op_len[i] = len;
1745 dout(" op %d has %d bytes\n", i, len);
1746 payload_len += len;
1747 p += sizeof(*op);
1748 }
9fc6e064
AE		 1749 bytes = le32_to_cpu(msg->hdr.data_len);
1750 if (payload_len != bytes) {
1b83bef2 1751 pr_warning("sum of op payload lens %d != data_len %d",
9fc6e064 1752 payload_len, bytes);
1b83bef2
SW		 1753 goto bad_put;
1754 }
1755
18741196 1756 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1757 retry_attempt = ceph_decode_32(&p);
1758 for (i = 0; i < numops; i++)
1759 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1760
205ee118
ID		 1761 if (le16_to_cpu(msg->hdr.version) >= 6) {
1762 p += 8 + 4; /* skip replay_version */
1763 p += 8; /* skip user_version */
eb845ff1 1764
205ee118
ID		 1765 err = ceph_redirect_decode(&p, end, &redir);
1766 if (err)
1767 goto bad_put;
1768 } else {
1769 redir.oloc.pool = -1;
1770 }
f24e9980 1771
205ee118
ID		 1772 if (redir.oloc.pool != -1) {
1773 dout("redirect pool %lld\n", redir.oloc.pool);
1774
1775 __unregister_request(osdc, req);
205ee118
ID		 1776
1777 req->r_target_oloc = redir.oloc; /* struct */
1778
1779 /*
1780 * Start redirect requests with nofail=true. If
1781 * mapping fails, request will end up on the notarget
1782 * list, waiting for the new osdmap (which can take
1783 * a while), even though the original request mapped
1784 * successfully. In the future we might want to follow
1785 * original request's nofail setting here.
1786 */
ff513ace 1787 err = __ceph_osdc_start_request(osdc, req, true);
205ee118
ID		 1788 BUG_ON(err);
1789
ff513ace 1790 goto out_unlock;
205ee118
ID		 1791 }
1792
1793 already_completed = req->r_got_reply;
1794 if (!req->r_got_reply) {
1b83bef2 1795 req->r_result = result;
f24e9980
SW		 1796 dout("handle_reply result %d bytes %d\n", req->r_result,
1797 bytes);
1798 if (req->r_result == 0)
1799 req->r_result = bytes;
1800
1801 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1802 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1803 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1804
1805 req->r_got_reply = 1;
1806 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1807 dout("handle_reply tid %llu dup ack\n", tid);
ff513ace 1808 goto out_unlock;
f24e9980
SW		 1809 }
1810
1811 dout("handle_reply tid %llu flags %d\n", tid, flags);
1812
a40c4f10
YS		 1813 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1814 __register_linger_request(osdc, req);
1815
f24e9980 1816 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1817 if (result < 0 ||
1818 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1819 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1820 __unregister_request(osdc, req);
1821
1822 mutex_unlock(&osdc->request_mutex);
ff513ace 1823 up_read(&osdc->map_sem);
f24e9980 1824
eb845ff1 1825 if (!already_completed) {
61c5d6bf
YZ		 1826 if (req->r_unsafe_callback &&
1827 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1828 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1829 if (req->r_callback)
1830 req->r_callback(req, msg);
1831 else
1832 complete_all(&req->r_completion);
1833 }
f24e9980 1834
61c5d6bf
YZ		 1835 if (flags & CEPH_OSD_FLAG_ONDISK) {
1836 if (req->r_unsafe_callback && already_completed)
1837 req->r_unsafe_callback(req, false);
25845472 1838 complete_request(req);
61c5d6bf 1839 }
f24e9980 1840
ff513ace 1841out:
a40c4f10 1842 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1843 ceph_osdc_put_request(req);
1844 return;
ff513ace
ID		 1845out_unlock:
1846 mutex_unlock(&osdc->request_mutex);
1847 up_read(&osdc->map_sem);
1848 goto out;
f24e9980 1849
1b83bef2 1850bad_put:
37c89bde
LW		 1851 req->r_result = -EIO;
1852 __unregister_request(osdc, req);
1853 if (req->r_callback)
1854 req->r_callback(req, msg);
1855 else
1856 complete_all(&req->r_completion);
1857 complete_request(req);
1b83bef2 1858 ceph_osdc_put_request(req);
8058fd45
AE		 1859bad_mutex:
1860 mutex_unlock(&osdc->request_mutex);
ff513ace 1861 up_read(&osdc->map_sem);
f24e9980 1862bad:
1b83bef2
SW		 1863 pr_err("corrupt osd_op_reply got %d %d\n",
1864 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1865 ceph_msg_dump(msg);
f24e9980
SW		 1866}
1867
6f6c7006 1868static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1869{
f24e9980 1870 struct rb_node *p, *n;
f24e9980 1871
6f6c7006
SW		 1872 for (p = rb_first(&osdc->osds); p; p = n) {
1873 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1874
6f6c7006
SW		 1875 n = rb_next(p);
1876 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1877 memcmp(&osd->o_con.peer_addr,
1878 ceph_osd_addr(osdc->osdmap,
1879 osd->o_osd),
1880 sizeof(struct ceph_entity_addr)) != 0)
1881 __reset_osd(osdc, osd);
f24e9980 1882 }
422d2cb8
YS		 1883}
1884
1885/*
6f6c7006
SW		 1886 * Requeue requests whose mapping to an OSD has changed. If requests map to
1887 * no osd, request a new map.
422d2cb8 1888 *
e6d50f67 1889 * Caller should hold map_sem for read.
422d2cb8 1890 */
9a1ea2db
JD		 1891static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1892 bool force_resend_writes)
422d2cb8 1893{
a40c4f10 1894 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1895 struct rb_node *p;
1896 int needmap = 0;
1897 int err;
9a1ea2db 1898 bool force_resend_req;
422d2cb8 1899
9a1ea2db
JD		 1900 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1901 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1902 mutex_lock(&osdc->request_mutex);
6194ea89 1903 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1904 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1905 p = rb_next(p);
ab60b16d
AE		 1906
1907 /*
1908 * For linger requests that have not yet been
1909 * registered, move them to the linger list; they'll
1910 * be sent to the osd in the loop below. Unregister
1911 * the request before re-registering it as a linger
1912 * request to ensure the __map_request() below
1913 * will decide it needs to be sent.
1914 */
1915 if (req->r_linger && list_empty(&req->r_linger_item)) {
1916 dout("%p tid %llu restart on osd%d\n",
1917 req, req->r_tid,
1918 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 1919 ceph_osdc_get_request(req);
ab60b16d
AE		 1920 __unregister_request(osdc, req);
1921 __register_linger_request(osdc, req);
96e4dac6 1922 ceph_osdc_put_request(req);
ab60b16d
AE		 1923 continue;
1924 }
1925
9a1ea2db
JD		 1926 force_resend_req = force_resend ||
1927 (force_resend_writes &&
1928 req->r_flags & CEPH_OSD_FLAG_WRITE);
1929 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 1930 if (err < 0)
1931 continue; /* error */
1932 if (req->r_osd == NULL) {
1933 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1934 needmap++; /* request a newer map */
1935 } else if (err > 0) {
6194ea89
SW		 1936 if (!req->r_linger) {
1937 dout("%p tid %llu requeued on osd%d\n", req,
1938 req->r_tid,
1939 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1940 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1941 }
1942 }
a40c4f10
YS		 1943 }
1944
1945 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1946 r_linger_item) {
1947 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1948
9a1ea2db
JD		 1949 err = __map_request(osdc, req,
1950 force_resend || force_resend_writes);
ab60b16d 1951 dout("__map_request returned %d\n", err);
a40c4f10
YS		 1952 if (err == 0)
1953 continue; /* no change and no osd was specified */
1954 if (err < 0)
1955 continue; /* hrm! */
1956 if (req->r_osd == NULL) {
1957 dout("tid %llu maps to no valid osd\n", req->r_tid);
1958 needmap++; /* request a newer map */
1959 continue;
6f6c7006 1960 }
a40c4f10
YS		 1961
1962 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1963 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1964 __register_request(osdc, req);
c89ce05e 1965 __unregister_linger_request(osdc, req);
6f6c7006 1966 }
14d2f38d 1967 reset_changed_osds(osdc);
f24e9980
SW		 1968 mutex_unlock(&osdc->request_mutex);
1969
1970 if (needmap) {
1971 dout("%d requests for down osds, need new map\n", needmap);
1972 ceph_monc_request_next_osdmap(&osdc->client->monc);
1973 }
422d2cb8 1974}
6f6c7006
SW		 1975
1976
f24e9980
SW		 1977/*
1978 * Process updated osd map.
1979 *
1980 * The message contains any number of incremental and full maps, normally
1981 * indicating some sort of topology change in the cluster. Kick requests
1982 * off to different OSDs as needed.
1983 */
1984void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1985{
1986 void *p, *end, *next;
1987 u32 nr_maps, maplen;
1988 u32 epoch;
1989 struct ceph_osdmap *newmap = NULL, *oldmap;
1990 int err;
1991 struct ceph_fsid fsid;
9a1ea2db 1992 bool was_full;
f24e9980
SW		 1993
1994 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1995 p = msg->front.iov_base;
1996 end = p + msg->front.iov_len;
1997
1998 /* verify fsid */
1999 ceph_decode_need(&p, end, sizeof(fsid), bad);
2000 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 2001 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2002 return;
f24e9980
SW		 2003
2004 down_write(&osdc->map_sem);
2005
9a1ea2db
JD		 2006 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2007
f24e9980
SW		 2008 /* incremental maps */
2009 ceph_decode_32_safe(&p, end, nr_maps, bad);
2010 dout(" %d inc maps\n", nr_maps);
2011 while (nr_maps > 0) {
2012 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2013 epoch = ceph_decode_32(&p);
2014 maplen = ceph_decode_32(&p);
f24e9980
SW		 2015 ceph_decode_need(&p, end, maplen, bad);
2016 next = p + maplen;
2017 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2018 dout("applying incremental map %u len %d\n",
2019 epoch, maplen);
2020 newmap = osdmap_apply_incremental(&p, next,
2021 osdc->osdmap,
15d9882c 2022 &osdc->client->msgr);
f24e9980
SW		 2023 if (IS_ERR(newmap)) {
2024 err = PTR_ERR(newmap);
2025 goto bad;
2026 }
30dc6381 2027 BUG_ON(!newmap);
f24e9980
SW		 2028 if (newmap != osdc->osdmap) {
2029 ceph_osdmap_destroy(osdc->osdmap);
2030 osdc->osdmap = newmap;
2031 }
9a1ea2db
JD		 2032 was_full = was_full ||
2033 ceph_osdmap_flag(osdc->osdmap,
2034 CEPH_OSDMAP_FULL);
2035 kick_requests(osdc, 0, was_full);
f24e9980
SW		 2036 } else {
2037 dout("ignoring incremental map %u len %d\n",
2038 epoch, maplen);
2039 }
2040 p = next;
2041 nr_maps--;
2042 }
2043 if (newmap)
2044 goto done;
2045
2046 /* full maps */
2047 ceph_decode_32_safe(&p, end, nr_maps, bad);
2048 dout(" %d full maps\n", nr_maps);
2049 while (nr_maps) {
2050 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2051 epoch = ceph_decode_32(&p);
2052 maplen = ceph_decode_32(&p);
f24e9980
SW		 2053 ceph_decode_need(&p, end, maplen, bad);
2054 if (nr_maps > 1) {
2055 dout("skipping non-latest full map %u len %d\n",
2056 epoch, maplen);
2057 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2058 dout("skipping full map %u len %d, "
2059 "older than our %u\n", epoch, maplen,
2060 osdc->osdmap->epoch);
2061 } else {
38d6453c
SW		 2062 int skipped_map = 0;
2063
f24e9980 2064 dout("taking full map %u len %d\n", epoch, maplen);
a2505d63 2065 newmap = ceph_osdmap_decode(&p, p+maplen);
f24e9980
SW		 2066 if (IS_ERR(newmap)) {
2067 err = PTR_ERR(newmap);
2068 goto bad;
2069 }
30dc6381 2070 BUG_ON(!newmap);
f24e9980
SW		 2071 oldmap = osdc->osdmap;
2072 osdc->osdmap = newmap;
38d6453c
SW		 2073 if (oldmap) {
2074 if (oldmap->epoch + 1 < newmap->epoch)
2075 skipped_map = 1;
f24e9980 2076 ceph_osdmap_destroy(oldmap);
38d6453c 2077 }
9a1ea2db
JD		 2078 was_full = was_full ||
2079 ceph_osdmap_flag(osdc->osdmap,
2080 CEPH_OSDMAP_FULL);
2081 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2082 }
2083 p += maplen;
2084 nr_maps--;
2085 }
2086
b72e19b9
DC		 2087 if (!osdc->osdmap)
2088 goto bad;
f24e9980
SW		 2089done:
2090 downgrade_write(&osdc->map_sem);
2091 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 2092
2093 /*
2094 * subscribe to subsequent osdmap updates if full to ensure
2095 * we find out when we are no longer full and stop returning
2096 * ENOSPC.
2097 */
d29adb34
JD		 2098 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2099 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2100 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2101 ceph_monc_request_next_osdmap(&osdc->client->monc);
2102
f9d25199
AE		 2103 mutex_lock(&osdc->request_mutex);
2104 __send_queued(osdc);
2105 mutex_unlock(&osdc->request_mutex);
f24e9980 2106 up_read(&osdc->map_sem);
03066f23 2107 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2108 return;
2109
2110bad:
2111 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2112 ceph_msg_dump(msg);
f24e9980
SW		 2113 up_write(&osdc->map_sem);
2114 return;
2115}
2116
a40c4f10
YS		 2117/*
2118 * watch/notify callback event infrastructure
2119 *
2120 * These callbacks are used both for watch and notify operations.
2121 */
2122static void __release_event(struct kref *kref)
2123{
2124 struct ceph_osd_event *event =
2125 container_of(kref, struct ceph_osd_event, kref);
2126
2127 dout("__release_event %p\n", event);
2128 kfree(event);
2129}
2130
2131static void get_event(struct ceph_osd_event *event)
2132{
2133 kref_get(&event->kref);
2134}
2135
2136void ceph_osdc_put_event(struct ceph_osd_event *event)
2137{
2138 kref_put(&event->kref, __release_event);
2139}
2140EXPORT_SYMBOL(ceph_osdc_put_event);
2141
2142static void __insert_event(struct ceph_osd_client *osdc,
2143 struct ceph_osd_event *new)
2144{
2145 struct rb_node **p = &osdc->event_tree.rb_node;
2146 struct rb_node *parent = NULL;
2147 struct ceph_osd_event *event = NULL;
2148
2149 while (*p) {
2150 parent = *p;
2151 event = rb_entry(parent, struct ceph_osd_event, node);
2152 if (new->cookie < event->cookie)
2153 p = &(*p)->rb_left;
2154 else if (new->cookie > event->cookie)
2155 p = &(*p)->rb_right;
2156 else
2157 BUG();
2158 }
2159
2160 rb_link_node(&new->node, parent, p);
2161 rb_insert_color(&new->node, &osdc->event_tree);
2162}
2163
2164static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2165 u64 cookie)
2166{
2167 struct rb_node **p = &osdc->event_tree.rb_node;
2168 struct rb_node *parent = NULL;
2169 struct ceph_osd_event *event = NULL;
2170
2171 while (*p) {
2172 parent = *p;
2173 event = rb_entry(parent, struct ceph_osd_event, node);
2174 if (cookie < event->cookie)
2175 p = &(*p)->rb_left;
2176 else if (cookie > event->cookie)
2177 p = &(*p)->rb_right;
2178 else
2179 return event;
2180 }
2181 return NULL;
2182}
2183
2184static void __remove_event(struct ceph_osd_event *event)
2185{
2186 struct ceph_osd_client *osdc = event->osdc;
2187
2188 if (!RB_EMPTY_NODE(&event->node)) {
2189 dout("__remove_event removed %p\n", event);
2190 rb_erase(&event->node, &osdc->event_tree);
2191 ceph_osdc_put_event(event);
2192 } else {
2193 dout("__remove_event didn't remove %p\n", event);
2194 }
2195}
2196
2197int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2198 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2199 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2200{
2201 struct ceph_osd_event *event;
2202
2203 event = kmalloc(sizeof(*event), GFP_NOIO);
2204 if (!event)
2205 return -ENOMEM;
2206
2207 dout("create_event %p\n", event);
2208 event->cb = event_cb;
3c663bbd 2209 event->one_shot = 0;
a40c4f10
YS		 2210 event->data = data;
2211 event->osdc = osdc;
2212 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2213 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2214 kref_init(&event->kref); /* one ref for us */
2215 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2216
2217 spin_lock(&osdc->event_lock);
2218 event->cookie = ++osdc->event_count;
2219 __insert_event(osdc, event);
2220 spin_unlock(&osdc->event_lock);
2221
2222 *pevent = event;
2223 return 0;
2224}
2225EXPORT_SYMBOL(ceph_osdc_create_event);
2226
2227void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2228{
2229 struct ceph_osd_client *osdc = event->osdc;
2230
2231 dout("cancel_event %p\n", event);
2232 spin_lock(&osdc->event_lock);
2233 __remove_event(event);
2234 spin_unlock(&osdc->event_lock);
2235 ceph_osdc_put_event(event); /* caller's */
2236}
2237EXPORT_SYMBOL(ceph_osdc_cancel_event);
2238
2239
2240static void do_event_work(struct work_struct *work)
2241{
2242 struct ceph_osd_event_work *event_work =
2243 container_of(work, struct ceph_osd_event_work, work);
2244 struct ceph_osd_event *event = event_work->event;
2245 u64 ver = event_work->ver;
2246 u64 notify_id = event_work->notify_id;
2247 u8 opcode = event_work->opcode;
2248
2249 dout("do_event_work completing %p\n", event);
2250 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2251 dout("do_event_work completed %p\n", event);
2252 ceph_osdc_put_event(event);
2253 kfree(event_work);
2254}
2255
2256
2257/*
2258 * Process osd watch notifications
2259 */
3c663bbd
AE		 2260static void handle_watch_notify(struct ceph_osd_client *osdc,
2261 struct ceph_msg *msg)
a40c4f10
YS		 2262{
2263 void *p, *end;
2264 u8 proto_ver;
2265 u64 cookie, ver, notify_id;
2266 u8 opcode;
2267 struct ceph_osd_event *event;
2268 struct ceph_osd_event_work *event_work;
2269
2270 p = msg->front.iov_base;
2271 end = p + msg->front.iov_len;
2272
2273 ceph_decode_8_safe(&p, end, proto_ver, bad);
2274 ceph_decode_8_safe(&p, end, opcode, bad);
2275 ceph_decode_64_safe(&p, end, cookie, bad);
2276 ceph_decode_64_safe(&p, end, ver, bad);
2277 ceph_decode_64_safe(&p, end, notify_id, bad);
2278
2279 spin_lock(&osdc->event_lock);
2280 event = __find_event(osdc, cookie);
2281 if (event) {
3c663bbd 2282 BUG_ON(event->one_shot);
a40c4f10 2283 get_event(event);
a40c4f10
YS		 2284 }
2285 spin_unlock(&osdc->event_lock);
2286 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2287 cookie, ver, event);
2288 if (event) {
2289 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10
YS		 2290 if (!event_work) {
2291 dout("ERROR: could not allocate event_work\n");
2292 goto done_err;
2293 }
6b0ae409 2294 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2295 event_work->event = event;
2296 event_work->ver = ver;
2297 event_work->notify_id = notify_id;
2298 event_work->opcode = opcode;
2299 if (!queue_work(osdc->notify_wq, &event_work->work)) {
2300 dout("WARNING: failed to queue notify event work\n");
2301 goto done_err;
2302 }
2303 }
2304
2305 return;
2306
2307done_err:
a40c4f10
YS		 2308 ceph_osdc_put_event(event);
2309 return;
2310
2311bad:
2312 pr_err("osdc handle_watch_notify corrupt msg\n");
2313 return;
2314}
2315
e65550fd
AE		 2316/*
2317 * build new request AND message
2318 *
2319 */
2320void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2321 struct ceph_snap_context *snapc, u64 snap_id,
2322 struct timespec *mtime)
2323{
2324 struct ceph_msg *msg = req->r_request;
2325 void *p;
2326 size_t msg_size;
2327 int flags = req->r_flags;
2328 u64 data_len;
2329 unsigned int i;
2330
2331 req->r_snapid = snap_id;
2332 req->r_snapc = ceph_get_snap_context(snapc);
2333
2334 /* encode request */
2335 msg->hdr.version = cpu_to_le16(4);
2336
2337 p = msg->front.iov_base;
2338 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2339 req->r_request_osdmap_epoch = p;
2340 p += 4;
2341 req->r_request_flags = p;
2342 p += 4;
2343 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2344 ceph_encode_timespec(p, mtime);
2345 p += sizeof(struct ceph_timespec);
2346 req->r_request_reassert_version = p;
2347 p += sizeof(struct ceph_eversion); /* will get filled in */
2348
2349 /* oloc */
2350 ceph_encode_8(&p, 4);
2351 ceph_encode_8(&p, 4);
2352 ceph_encode_32(&p, 8 + 4 + 4);
2353 req->r_request_pool = p;
2354 p += 8;
2355 ceph_encode_32(&p, -1); /* preferred */
2356 ceph_encode_32(&p, 0); /* key len */
2357
2358 ceph_encode_8(&p, 1);
2359 req->r_request_pgid = p;
2360 p += 8 + 4;
2361 ceph_encode_32(&p, -1); /* preferred */
2362
2363 /* oid */
3c972c95
ID		 2364 ceph_encode_32(&p, req->r_base_oid.name_len);
2365 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2366 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2367 req->r_base_oid.name, req->r_base_oid.name_len);
2368 p += req->r_base_oid.name_len;
e65550fd
AE		 2369
2370 /* ops--can imply data */
2371 ceph_encode_16(&p, (u16)req->r_num_ops);
2372 data_len = 0;
2373 for (i = 0; i < req->r_num_ops; i++) {
2374 data_len += osd_req_encode_op(req, p, i);
2375 p += sizeof(struct ceph_osd_op);
2376 }
2377
2378 /* snaps */
2379 ceph_encode_64(&p, req->r_snapid);
2380 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2381 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2382 if (req->r_snapc) {
2383 for (i = 0; i < snapc->num_snaps; i++) {
2384 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2385 }
2386 }
2387
2388 req->r_request_attempts = p;
2389 p += 4;
2390
2391 /* data */
2392 if (flags & CEPH_OSD_FLAG_WRITE) {
2393 u16 data_off;
2394
2395 /*
2396 * The header "data_off" is a hint to the receiver
2397 * allowing it to align received data into its
2398 * buffers such that there's no need to re-copy
2399 * it before writing it to disk (direct I/O).
2400 */
2401 data_off = (u16) (off & 0xffff);
2402 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2403 }
2404 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2405
2406 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2407 msg_size = p - msg->front.iov_base;
2408 msg->front.iov_len = msg_size;
2409 msg->hdr.front_len = cpu_to_le32(msg_size);
2410
2411 dout("build_request msg_size was %d\n", (int)msg_size);
2412}
2413EXPORT_SYMBOL(ceph_osdc_build_request);
2414
70636773
AE		 2415/*
2416 * Register request, send initial attempt.
2417 */
2418int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2419 struct ceph_osd_request *req,
2420 bool nofail)
2421{
0bbfdfe8 2422 int rc;
70636773 2423
f24e9980
SW		 2424 down_read(&osdc->map_sem);
2425 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2426
2427 rc = __ceph_osdc_start_request(osdc, req, nofail);
2428
f24e9980
SW		 2429 mutex_unlock(&osdc->request_mutex);
2430 up_read(&osdc->map_sem);
0bbfdfe8 2431
f24e9980
SW		 2432 return rc;
2433}
3d14c5d2 2434EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980
SW		 2435
2436/*
2437 * wait for a request to complete
2438 */
2439int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2440 struct ceph_osd_request *req)
2441{
2442 int rc;
2443
2444 rc = wait_for_completion_interruptible(&req->r_completion);
2445 if (rc < 0) {
2446 mutex_lock(&osdc->request_mutex);
2447 __cancel_request(req);
529cfcc4 2448 __unregister_request(osdc, req);
f24e9980 2449 mutex_unlock(&osdc->request_mutex);
25845472 2450 complete_request(req);
529cfcc4 2451 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
f24e9980
SW		 2452 return rc;
2453 }
2454
2455 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2456 return req->r_result;
2457}
3d14c5d2 2458EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2459
2460/*
2461 * sync - wait for all in-flight requests to flush. avoid starvation.
2462 */
2463void ceph_osdc_sync(struct ceph_osd_client *osdc)
2464{
2465 struct ceph_osd_request *req;
2466 u64 last_tid, next_tid = 0;
2467
2468 mutex_lock(&osdc->request_mutex);
2469 last_tid = osdc->last_tid;
2470 while (1) {
2471 req = __lookup_request_ge(osdc, next_tid);
2472 if (!req)
2473 break;
2474 if (req->r_tid > last_tid)
2475 break;
2476
2477 next_tid = req->r_tid + 1;
2478 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2479 continue;
2480
2481 ceph_osdc_get_request(req);
2482 mutex_unlock(&osdc->request_mutex);
2483 dout("sync waiting on tid %llu (last is %llu)\n",
2484 req->r_tid, last_tid);
2485 wait_for_completion(&req->r_safe_completion);
2486 mutex_lock(&osdc->request_mutex);
2487 ceph_osdc_put_request(req);
2488 }
2489 mutex_unlock(&osdc->request_mutex);
2490 dout("sync done (thru tid %llu)\n", last_tid);
2491}
3d14c5d2 2492EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2493
dd935f44
JD		 2494/*
2495 * Call all pending notify callbacks - for use after a watch is
2496 * unregistered, to make sure no more callbacks for it will be invoked
2497 */
2498extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2499{
2500 flush_workqueue(osdc->notify_wq);
2501}
2502EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2503
2504
f24e9980
SW		 2505/*
2506 * init, shutdown
2507 */
2508int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2509{
2510 int err;
2511
2512 dout("init\n");
2513 osdc->client = client;
2514 osdc->osdmap = NULL;
2515 init_rwsem(&osdc->map_sem);
2516 init_completion(&osdc->map_waiters);
2517 osdc->last_requested_map = 0;
2518 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2519 osdc->last_tid = 0;
2520 osdc->osds = RB_ROOT;
f5a2041b 2521 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2522 osdc->requests = RB_ROOT;
422d2cb8 2523 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2524 INIT_LIST_HEAD(&osdc->req_unsent);
2525 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2526 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2527 osdc->num_requests = 0;
2528 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2529 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2530 spin_lock_init(&osdc->event_lock);
2531 osdc->event_tree = RB_ROOT;
2532 osdc->event_count = 0;
f5a2041b
YS		 2533
2534 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2535 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2536
5f44f142 2537 err = -ENOMEM;
f24e9980
SW		 2538 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2539 sizeof(struct ceph_osd_request));
2540 if (!osdc->req_mempool)
5f44f142 2541 goto out;
f24e9980 2542
d50b409f
SW		 2543 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2544 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2545 "osd_op");
f24e9980 2546 if (err < 0)
5f44f142 2547 goto out_mempool;
d50b409f 2548 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2549 OSD_OPREPLY_FRONT_LEN, 10, true,
2550 "osd_op_reply");
c16e7869
SW		 2551 if (err < 0)
2552 goto out_msgpool;
a40c4f10 2553
dbcae088 2554 err = -ENOMEM;
a40c4f10 2555 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2556 if (!osdc->notify_wq)
c172ec5c
ID		 2557 goto out_msgpool_reply;
2558
f24e9980 2559 return 0;
5f44f142 2560
c172ec5c
ID		 2561out_msgpool_reply:
2562 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2563out_msgpool:
2564 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2565out_mempool:
2566 mempool_destroy(osdc->req_mempool);
2567out:
2568 return err;
f24e9980
SW		 2569}
2570
2571void ceph_osdc_stop(struct ceph_osd_client *osdc)
2572{
a40c4f10
YS		 2573 flush_workqueue(osdc->notify_wq);
2574 destroy_workqueue(osdc->notify_wq);
f24e9980 2575 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2576 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2577 if (osdc->osdmap) {
2578 ceph_osdmap_destroy(osdc->osdmap);
2579 osdc->osdmap = NULL;
2580 }
aca420bc 2581 remove_all_osds(osdc);
f24e9980
SW		 2582 mempool_destroy(osdc->req_mempool);
2583 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2584 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2585}
2586
2587/*
2588 * Read some contiguous pages. If we cross a stripe boundary, shorten
2589 * *plen. Return number of bytes read, or error.
2590 */
2591int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2592 struct ceph_vino vino, struct ceph_file_layout *layout,
2593 u64 off, u64 *plen,
2594 u32 truncate_seq, u64 truncate_size,
b7495fc2 2595 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2596{
2597 struct ceph_osd_request *req;
2598 int rc = 0;
2599
2600 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2601 vino.snap, off, *plen);
79528734 2602 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
f24e9980 2603 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2604 NULL, truncate_seq, truncate_size,
153e5167 2605 false);
6816282d
SW		 2606 if (IS_ERR(req))
2607 return PTR_ERR(req);
f24e9980
SW		 2608
2609 /* it may be a short read due to an object boundary */
0fff87ec 2610
406e2c9f 2611 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2612 pages, *plen, page_align, false, false);
f24e9980 2613
e0c59487 2614 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2615 off, *plen, *plen, page_align);
f24e9980 2616
79528734 2617 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2618
f24e9980
SW		 2619 rc = ceph_osdc_start_request(osdc, req, false);
2620 if (!rc)
2621 rc = ceph_osdc_wait_request(osdc, req);
2622
2623 ceph_osdc_put_request(req);
2624 dout("readpages result %d\n", rc);
2625 return rc;
2626}
3d14c5d2 2627EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2628
2629/*
2630 * do a synchronous write on N pages
2631 */
2632int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2633 struct ceph_file_layout *layout,
2634 struct ceph_snap_context *snapc,
2635 u64 off, u64 len,
2636 u32 truncate_seq, u64 truncate_size,
2637 struct timespec *mtime,
24808826 2638 struct page **pages, int num_pages)
f24e9980
SW		 2639{
2640 struct ceph_osd_request *req;
2641 int rc = 0;
b7495fc2 2642 int page_align = off & ~PAGE_MASK;
f24e9980 2643
acead002 2644 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
79528734 2645 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
f24e9980 2646 CEPH_OSD_OP_WRITE,
24808826 2647 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2648 snapc, truncate_seq, truncate_size,
153e5167 2649 true);
6816282d
SW		 2650 if (IS_ERR(req))
2651 return PTR_ERR(req);
f24e9980
SW		 2652
2653 /* it may be a short write due to an object boundary */
406e2c9f 2654 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2655 false, false);
2656 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2657
79528734 2658 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2659
87f979d3 2660 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2661 if (!rc)
2662 rc = ceph_osdc_wait_request(osdc, req);
2663
2664 ceph_osdc_put_request(req);
2665 if (rc == 0)
2666 rc = len;
2667 dout("writepages result %d\n", rc);
2668 return rc;
2669}
3d14c5d2 2670EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2671
5522ae0b
AE		 2672int ceph_osdc_setup(void)
2673{
2674 BUG_ON(ceph_osd_request_cache);
2675 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2676 sizeof (struct ceph_osd_request),
2677 __alignof__(struct ceph_osd_request),
2678 0, NULL);
2679
2680 return ceph_osd_request_cache ? 0 : -ENOMEM;
2681}
2682EXPORT_SYMBOL(ceph_osdc_setup);
2683
2684void ceph_osdc_cleanup(void)
2685{
2686 BUG_ON(!ceph_osd_request_cache);
2687 kmem_cache_destroy(ceph_osd_request_cache);
2688 ceph_osd_request_cache = NULL;
2689}
2690EXPORT_SYMBOL(ceph_osdc_cleanup);
2691
f24e9980
SW		 2692/*
2693 * handle incoming message
2694 */
2695static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2696{
2697 struct ceph_osd *osd = con->private;
32c895e7 2698 struct ceph_osd_client *osdc;
f24e9980
SW		 2699 int type = le16_to_cpu(msg->hdr.type);
2700
2701 if (!osd)
4a32f93d 2702 goto out;
32c895e7 2703 osdc = osd->o_osdc;
f24e9980
SW		 2704
2705 switch (type) {
2706 case CEPH_MSG_OSD_MAP:
2707 ceph_osdc_handle_map(osdc, msg);
2708 break;
2709 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2710 handle_reply(osdc, msg, con);
f24e9980 2711 break;
a40c4f10
YS		 2712 case CEPH_MSG_WATCH_NOTIFY:
2713 handle_watch_notify(osdc, msg);
2714 break;
f24e9980
SW		 2715
2716 default:
2717 pr_err("received unknown message type %d %s\n", type,
2718 ceph_msg_type_name(type));
2719 }
4a32f93d 2720out:
f24e9980
SW		 2721 ceph_msg_put(msg);
2722}
2723
5b3a4db3 2724/*
21b667f6
SW		 2725 * lookup and return message for incoming reply. set up reply message
2726 * pages.
5b3a4db3
SW		 2727 */
2728static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2729 struct ceph_msg_header *hdr,
2730 int *skip)
f24e9980
SW		 2731{
2732 struct ceph_osd *osd = con->private;
2733 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2734 struct ceph_msg *m;
0547a9b3 2735 struct ceph_osd_request *req;
3f0a4ac5 2736 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2737 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2738 u64 tid;
f24e9980 2739
0547a9b3
YS		 2740 tid = le64_to_cpu(hdr->tid);
2741 mutex_lock(&osdc->request_mutex);
2742 req = __lookup_request(osdc, tid);
2743 if (!req) {
2744 *skip = 1;
2745 m = NULL;
756a16a5
SW		 2746 dout("get_reply unknown tid %llu from osd%d\n", tid,
2747 osd->o_osd);
0547a9b3
YS		 2748 goto out;
2749 }
c16e7869 2750
ace6d3a9 2751 if (req->r_reply->con)
8921d114 2752 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2753 req->r_reply, req->r_reply->con);
2754 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2755
f2be82b0 2756 if (front_len > req->r_reply->front_alloc_len) {
4974341e 2757 pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
f2be82b0 2758 front_len, req->r_reply->front_alloc_len,
4974341e
AE		 2759 (unsigned int)con->peer_name.type,
2760 le64_to_cpu(con->peer_name.num));
3f0a4ac5
ID		 2761 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2762 false);
a79832f2 2763 if (!m)
c16e7869
SW		 2764 goto out;
2765 ceph_msg_put(req->r_reply);
2766 req->r_reply = m;
2767 }
2768 m = ceph_msg_get(req->r_reply);
2769
0547a9b3 2770 if (data_len > 0) {
a4ce40a9 2771 struct ceph_osd_data *osd_data;
0fff87ec 2772
a4ce40a9
AE		 2773 /*
2774 * XXX This is assuming there is only one op containing
2775 * XXX page data. Probably OK for reads, but this
2776 * XXX ought to be done more generally.
2777 */
406e2c9f 2778 osd_data = osd_req_op_extent_osd_data(req, 0);
0fff87ec 2779 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2780 if (osd_data->pages &&
e0c59487 2781 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2782
e0c59487
AE		 2783 pr_warning("tid %lld reply has %d bytes "
2784 "we had only %llu bytes ready\n",
2785 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2786 *skip = 1;
2787 ceph_msg_put(m);
2788 m = NULL;
2789 goto out;
2790 }
2ac2b7a6 2791 }
0547a9b3 2792 }
5b3a4db3 2793 *skip = 0;
c16e7869 2794 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2795
2796out:
2797 mutex_unlock(&osdc->request_mutex);
2450418c 2798 return m;
5b3a4db3
SW		 2799
2800}
2801
2802static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2803 struct ceph_msg_header *hdr,
2804 int *skip)
2805{
2806 struct ceph_osd *osd = con->private;
2807 int type = le16_to_cpu(hdr->type);
2808 int front = le32_to_cpu(hdr->front_len);
2809
1c20f2d2 2810 *skip = 0;
5b3a4db3
SW		 2811 switch (type) {
2812 case CEPH_MSG_OSD_MAP:
a40c4f10 2813 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2814 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2815 case CEPH_MSG_OSD_OPREPLY:
2816 return get_reply(con, hdr, skip);
2817 default:
2818 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2819 osd->o_osd);
2820 *skip = 1;
2821 return NULL;
2822 }
f24e9980
SW		 2823}
2824
2825/*
2826 * Wrappers to refcount containing ceph_osd struct
2827 */
2828static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2829{
2830 struct ceph_osd *osd = con->private;
2831 if (get_osd(osd))
2832 return con;
2833 return NULL;
2834}
2835
2836static void put_osd_con(struct ceph_connection *con)
2837{
2838 struct ceph_osd *osd = con->private;
2839 put_osd(osd);
2840}
2841
4e7a5dcd
SW		 2842/*
2843 * authentication
2844 */
a3530df3
AE		 2845/*
2846 * Note: returned pointer is the address of a structure that's
2847 * managed separately. Caller must *not* attempt to free it.
2848 */
2849static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2850 int *proto, int force_new)
4e7a5dcd
SW		 2851{
2852 struct ceph_osd *o = con->private;
2853 struct ceph_osd_client *osdc = o->o_osdc;
2854 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2855 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2856
74f1869f 2857 if (force_new && auth->authorizer) {
27859f97 2858 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2859 auth->authorizer = NULL;
2860 }
27859f97
SW		 2861 if (!auth->authorizer) {
2862 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2863 auth);
4e7a5dcd 2864 if (ret)
a3530df3 2865 return ERR_PTR(ret);
27859f97
SW		 2866 } else {
2867 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2868 auth);
2869 if (ret)
2870 return ERR_PTR(ret);
4e7a5dcd 2871 }
4e7a5dcd 2872 *proto = ac->protocol;
74f1869f 2873
a3530df3 2874 return auth;
4e7a5dcd
SW		 2875}
2876
2877
2878static int verify_authorizer_reply(struct ceph_connection *con, int len)
2879{
2880 struct ceph_osd *o = con->private;
2881 struct ceph_osd_client *osdc = o->o_osdc;
2882 struct ceph_auth_client *ac = osdc->client->monc.auth;
2883
27859f97 2884 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2885}
2886
9bd2e6f8
SW		 2887static int invalidate_authorizer(struct ceph_connection *con)
2888{
2889 struct ceph_osd *o = con->private;
2890 struct ceph_osd_client *osdc = o->o_osdc;
2891 struct ceph_auth_client *ac = osdc->client->monc.auth;
2892
27859f97 2893 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2894 return ceph_monc_validate_auth(&osdc->client->monc);
2895}
4e7a5dcd 2896
9e32789f 2897static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2898 .get = get_osd_con,
2899 .put = put_osd_con,
2900 .dispatch = dispatch,
4e7a5dcd
SW		 2901 .get_authorizer = get_authorizer,
2902 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2903 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2904 .alloc_msg = alloc_msg,
81b024e7 2905 .fault = osd_reset,
f24e9980 2906};
Linux 6.x block layer and io_uring tree(s)