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Linus 3.14-rc1
[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:
439 case CEPH_OSD_OP_CLONERANGE:
440 case CEPH_OSD_OP_ASSERT_SRC_VERSION:
441 case CEPH_OSD_OP_SRC_CMPXATTR:
a9f36c3e 442 case CEPH_OSD_OP_GETXATTR:
4c46459c 443 case CEPH_OSD_OP_GETXATTRS:
a9f36c3e
AE		 444 case CEPH_OSD_OP_CMPXATTR:
445 case CEPH_OSD_OP_SETXATTR:
4c46459c
AE		 446 case CEPH_OSD_OP_SETXATTRS:
447 case CEPH_OSD_OP_RESETXATTRS:
448 case CEPH_OSD_OP_RMXATTR:
449 case CEPH_OSD_OP_PULL:
450 case CEPH_OSD_OP_PUSH:
451 case CEPH_OSD_OP_BALANCEREADS:
452 case CEPH_OSD_OP_UNBALANCEREADS:
453 case CEPH_OSD_OP_SCRUB:
454 case CEPH_OSD_OP_SCRUB_RESERVE:
455 case CEPH_OSD_OP_SCRUB_UNRESERVE:
456 case CEPH_OSD_OP_SCRUB_STOP:
457 case CEPH_OSD_OP_SCRUB_MAP:
458 case CEPH_OSD_OP_WRLOCK:
459 case CEPH_OSD_OP_WRUNLOCK:
460 case CEPH_OSD_OP_RDLOCK:
461 case CEPH_OSD_OP_RDUNLOCK:
462 case CEPH_OSD_OP_UPLOCK:
463 case CEPH_OSD_OP_DNLOCK:
a8dd0a37 464 case CEPH_OSD_OP_CALL:
4c46459c
AE		 465 case CEPH_OSD_OP_PGLS:
466 case CEPH_OSD_OP_PGLS_FILTER:
a8dd0a37
AE		 467 return true;
468 default:
469 return false;
470 }
471}
472
33803f33
AE		 473/*
474 * This is an osd op init function for opcodes that have no data or
475 * other information associated with them. It also serves as a
476 * common init routine for all the other init functions, below.
477 */
c99d2d4a 478static struct ceph_osd_req_op *
49719778 479_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
c99d2d4a 480 u16 opcode)
33803f33 481{
c99d2d4a
AE		 482 struct ceph_osd_req_op *op;
483
484 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 485 BUG_ON(!osd_req_opcode_valid(opcode));
486
c99d2d4a 487 op = &osd_req->r_ops[which];
33803f33 488 memset(op, 0, sizeof (*op));
33803f33 489 op->op = opcode;
c99d2d4a
AE		 490
491 return op;
33803f33
AE		 492}
493
49719778
AE		 494void osd_req_op_init(struct ceph_osd_request *osd_req,
495 unsigned int which, u16 opcode)
496{
497 (void)_osd_req_op_init(osd_req, which, opcode);
498}
499EXPORT_SYMBOL(osd_req_op_init);
500
c99d2d4a
AE		 501void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
502 unsigned int which, u16 opcode,
33803f33
AE		 503 u64 offset, u64 length,
504 u64 truncate_size, u32 truncate_seq)
505{
49719778 506 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33
AE		 507 size_t payload_len = 0;
508
ad7a60de
LW		 509 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
510 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
511 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 512
33803f33
AE		 513 op->extent.offset = offset;
514 op->extent.length = length;
515 op->extent.truncate_size = truncate_size;
516 op->extent.truncate_seq = truncate_seq;
517 if (opcode == CEPH_OSD_OP_WRITE)
518 payload_len += length;
519
520 op->payload_len = payload_len;
521}
522EXPORT_SYMBOL(osd_req_op_extent_init);
523
c99d2d4a
AE		 524void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
525 unsigned int which, u64 length)
e5975c7c 526{
c99d2d4a
AE		 527 struct ceph_osd_req_op *op;
528 u64 previous;
529
530 BUG_ON(which >= osd_req->r_num_ops);
531 op = &osd_req->r_ops[which];
532 previous = op->extent.length;
e5975c7c
AE		 533
534 if (length == previous)
535 return; /* Nothing to do */
536 BUG_ON(length > previous);
537
538 op->extent.length = length;
539 op->payload_len -= previous - length;
540}
541EXPORT_SYMBOL(osd_req_op_extent_update);
542
c99d2d4a 543void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 544 u16 opcode, const char *class, const char *method)
33803f33 545{
49719778 546 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
5f562df5 547 struct ceph_pagelist *pagelist;
33803f33
AE		 548 size_t payload_len = 0;
549 size_t size;
550
551 BUG_ON(opcode != CEPH_OSD_OP_CALL);
552
5f562df5
AE		 553 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
554 BUG_ON(!pagelist);
555 ceph_pagelist_init(pagelist);
556
33803f33
AE		 557 op->cls.class_name = class;
558 size = strlen(class);
559 BUG_ON(size > (size_t) U8_MAX);
560 op->cls.class_len = size;
5f562df5 561 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 562 payload_len += size;
563
564 op->cls.method_name = method;
565 size = strlen(method);
566 BUG_ON(size > (size_t) U8_MAX);
567 op->cls.method_len = size;
5f562df5 568 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 569 payload_len += size;
570
a4ce40a9 571 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 572
33803f33
AE		 573 op->cls.argc = 0; /* currently unused */
574
575 op->payload_len = payload_len;
576}
577EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 578
c99d2d4a
AE		 579void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
580 unsigned int which, u16 opcode,
33803f33
AE		 581 u64 cookie, u64 version, int flag)
582{
49719778 583 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33 584
c99d2d4a 585 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 586
587 op->watch.cookie = cookie;
9ef1ee5a 588 op->watch.ver = version;
33803f33 589 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 590 op->watch.flag = (u8)1;
33803f33
AE		 591}
592EXPORT_SYMBOL(osd_req_op_watch_init);
593
90af3602 594static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 595 struct ceph_osd_data *osd_data)
596{
597 u64 length = ceph_osd_data_length(osd_data);
598
599 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
600 BUG_ON(length > (u64) SIZE_MAX);
601 if (length)
90af3602 602 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 603 length, osd_data->alignment);
604 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
605 BUG_ON(!length);
90af3602 606 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 607#ifdef CONFIG_BLOCK
608 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 609 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 610#endif
611 } else {
612 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
613 }
614}
615
a8dd0a37 616static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 617 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 618{
79528734 619 struct ceph_osd_req_op *src;
04017e29 620 struct ceph_osd_data *osd_data;
54d50649 621 u64 request_data_len = 0;
04017e29 622 u64 data_length;
a8dd0a37 623
79528734
AE		 624 BUG_ON(which >= req->r_num_ops);
625 src = &req->r_ops[which];
a8dd0a37
AE		 626 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
627 pr_err("unrecognized osd opcode %d\n", src->op);
628
629 return 0;
630 }
631
632 switch (src->op) {
633 case CEPH_OSD_OP_STAT:
49719778
AE		 634 osd_data = &src->raw_data_in;
635 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 636 break;
637 case CEPH_OSD_OP_READ:
638 case CEPH_OSD_OP_WRITE:
ad7a60de
LW		 639 case CEPH_OSD_OP_ZERO:
640 case CEPH_OSD_OP_DELETE:
641 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37 642 if (src->op == CEPH_OSD_OP_WRITE)
54d50649 643 request_data_len = src->extent.length;
a8dd0a37
AE		 644 dst->extent.offset = cpu_to_le64(src->extent.offset);
645 dst->extent.length = cpu_to_le64(src->extent.length);
646 dst->extent.truncate_size =
647 cpu_to_le64(src->extent.truncate_size);
648 dst->extent.truncate_seq =
649 cpu_to_le32(src->extent.truncate_seq);
04017e29 650 osd_data = &src->extent.osd_data;
5476492f 651 if (src->op == CEPH_OSD_OP_WRITE)
04017e29 652 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 653 else
04017e29 654 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 655 break;
656 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 657 dst->cls.class_len = src->cls.class_len;
658 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 659 osd_data = &src->cls.request_info;
660 ceph_osdc_msg_data_add(req->r_request, osd_data);
661 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
662 request_data_len = osd_data->pagelist->length;
663
664 osd_data = &src->cls.request_data;
665 data_length = ceph_osd_data_length(osd_data);
666 if (data_length) {
667 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
668 dst->cls.indata_len = cpu_to_le32(data_length);
669 ceph_osdc_msg_data_add(req->r_request, osd_data);
670 src->payload_len += data_length;
671 request_data_len += data_length;
672 }
673 osd_data = &src->cls.response_data;
674 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 675 break;
676 case CEPH_OSD_OP_STARTSYNC:
677 break;
678 case CEPH_OSD_OP_NOTIFY_ACK:
679 case CEPH_OSD_OP_WATCH:
680 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
681 dst->watch.ver = cpu_to_le64(src->watch.ver);
682 dst->watch.flag = src->watch.flag;
683 break;
684 default:
4c46459c 685 pr_err("unsupported osd opcode %s\n",
8f63ca2d 686 ceph_osd_op_name(src->op));
4c46459c 687 WARN_ON(1);
a8dd0a37
AE		 688
689 return 0;
68b4476b 690 }
a8dd0a37 691 dst->op = cpu_to_le16(src->op);
68b4476b 692 dst->payload_len = cpu_to_le32(src->payload_len);
175face2 693
54d50649 694 return request_data_len;
68b4476b
YS		 695}
696
3499e8a5
YS		 697/*
698 * build new request AND message, calculate layout, and adjust file
699 * extent as needed.
700 *
701 * if the file was recently truncated, we include information about its
702 * old and new size so that the object can be updated appropriately. (we
703 * avoid synchronously deleting truncated objects because it's slow.)
704 *
705 * if @do_sync, include a 'startsync' command so that the osd will flush
706 * data quickly.
707 */
708struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
709 struct ceph_file_layout *layout,
710 struct ceph_vino vino,
acead002 711 u64 off, u64 *plen, int num_ops,
3499e8a5
YS		 712 int opcode, int flags,
713 struct ceph_snap_context *snapc,
3499e8a5
YS		 714 u32 truncate_seq,
715 u64 truncate_size,
153e5167 716 bool use_mempool)
3499e8a5 717{
68b4476b 718 struct ceph_osd_request *req;
75d1c941
AE		 719 u64 objnum = 0;
720 u64 objoff = 0;
721 u64 objlen = 0;
d18d1e28
AE		 722 u32 object_size;
723 u64 object_base;
6816282d 724 int r;
68b4476b 725
ad7a60de
LW		 726 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
727 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
728 opcode != CEPH_OSD_OP_TRUNCATE);
68b4476b 729
acead002 730 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 731 GFP_NOFS);
4ad12621 732 if (!req)
6816282d 733 return ERR_PTR(-ENOMEM);
79528734 734
d178a9e7 735 req->r_flags = flags;
3499e8a5
YS		 736
737 /* calculate max write size */
a19dadfb 738 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 739 if (r < 0) {
740 ceph_osdc_put_request(req);
6816282d 741 return ERR_PTR(r);
3ff5f385 742 }
a19dadfb 743
d18d1e28
AE		 744 object_size = le32_to_cpu(layout->fl_object_size);
745 object_base = off - objoff;
ccca4e37
YZ		 746 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
747 if (truncate_size <= object_base) {
748 truncate_size = 0;
749 } else {
750 truncate_size -= object_base;
751 if (truncate_size > object_size)
752 truncate_size = object_size;
753 }
a19dadfb 754 }
d18d1e28 755
c99d2d4a 756 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
b0270324 757 truncate_size, truncate_seq);
8c042b0d 758
acead002
AE		 759 /*
760 * A second op in the ops array means the caller wants to
761 * also issue a include a 'startsync' command so that the
762 * osd will flush data quickly.
763 */
764 if (num_ops > 1)
c99d2d4a 765 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
d18d1e28 766
3c972c95 767 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
3499e8a5 768
3c972c95 769 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
4295f221 770 "%llx.%08llx", vino.ino, objnum);
3c972c95 771 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
dbe0fc41 772
f24e9980
SW		 773 return req;
774}
3d14c5d2 775EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 776
777/*
778 * We keep osd requests in an rbtree, sorted by ->r_tid.
779 */
780static void __insert_request(struct ceph_osd_client *osdc,
781 struct ceph_osd_request *new)
782{
783 struct rb_node **p = &osdc->requests.rb_node;
784 struct rb_node *parent = NULL;
785 struct ceph_osd_request *req = NULL;
786
787 while (*p) {
788 parent = *p;
789 req = rb_entry(parent, struct ceph_osd_request, r_node);
790 if (new->r_tid < req->r_tid)
791 p = &(*p)->rb_left;
792 else if (new->r_tid > req->r_tid)
793 p = &(*p)->rb_right;
794 else
795 BUG();
796 }
797
798 rb_link_node(&new->r_node, parent, p);
799 rb_insert_color(&new->r_node, &osdc->requests);
800}
801
802static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
803 u64 tid)
804{
805 struct ceph_osd_request *req;
806 struct rb_node *n = osdc->requests.rb_node;
807
808 while (n) {
809 req = rb_entry(n, struct ceph_osd_request, r_node);
810 if (tid < req->r_tid)
811 n = n->rb_left;
812 else if (tid > req->r_tid)
813 n = n->rb_right;
814 else
815 return req;
816 }
817 return NULL;
818}
819
820static struct ceph_osd_request *
821__lookup_request_ge(struct ceph_osd_client *osdc,
822 u64 tid)
823{
824 struct ceph_osd_request *req;
825 struct rb_node *n = osdc->requests.rb_node;
826
827 while (n) {
828 req = rb_entry(n, struct ceph_osd_request, r_node);
829 if (tid < req->r_tid) {
830 if (!n->rb_left)
831 return req;
832 n = n->rb_left;
833 } else if (tid > req->r_tid) {
834 n = n->rb_right;
835 } else {
836 return req;
837 }
838 }
839 return NULL;
840}
841
6f6c7006
SW		 842/*
843 * Resubmit requests pending on the given osd.
844 */
845static void __kick_osd_requests(struct ceph_osd_client *osdc,
846 struct ceph_osd *osd)
847{
a40c4f10 848 struct ceph_osd_request *req, *nreq;
e02493c0 849 LIST_HEAD(resend);
6f6c7006
SW		 850 int err;
851
852 dout("__kick_osd_requests osd%d\n", osd->o_osd);
853 err = __reset_osd(osdc, osd);
685a7555 854 if (err)
6f6c7006 855 return;
e02493c0
AE		 856 /*
857 * Build up a list of requests to resend by traversing the
858 * osd's list of requests. Requests for a given object are
859 * sent in tid order, and that is also the order they're
860 * kept on this list. Therefore all requests that are in
861 * flight will be found first, followed by all requests that
862 * have not yet been sent. And to resend requests while
863 * preserving this order we will want to put any sent
864 * requests back on the front of the osd client's unsent
865 * list.
866 *
867 * So we build a separate ordered list of already-sent
868 * requests for the affected osd and splice it onto the
869 * front of the osd client's unsent list. Once we've seen a
870 * request that has not yet been sent we're done. Those
871 * requests are already sitting right where they belong.
872 */
6f6c7006 873 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 874 if (!req->r_sent)
875 break;
876 list_move_tail(&req->r_req_lru_item, &resend);
877 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
6f6c7006 878 osd->o_osd);
a40c4f10
YS		 879 if (!req->r_linger)
880 req->r_flags |= CEPH_OSD_FLAG_RETRY;
881 }
e02493c0 882 list_splice(&resend, &osdc->req_unsent);
a40c4f10 883
e02493c0
AE		 884 /*
885 * Linger requests are re-registered before sending, which
886 * sets up a new tid for each. We add them to the unsent
887 * list at the end to keep things in tid order.
888 */
a40c4f10
YS		 889 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
890 r_linger_osd) {
77f38e0e
SW		 891 /*
892 * reregister request prior to unregistering linger so
893 * that r_osd is preserved.
894 */
895 BUG_ON(!list_empty(&req->r_req_lru_item));
a40c4f10 896 __register_request(osdc, req);
e02493c0 897 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
ad885927 898 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
77f38e0e 899 __unregister_linger_request(osdc, req);
a40c4f10
YS		 900 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
901 osd->o_osd);
6f6c7006
SW		 902 }
903}
904
f24e9980 905/*
81b024e7 906 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 907 */
908static void osd_reset(struct ceph_connection *con)
909{
910 struct ceph_osd *osd = con->private;
911 struct ceph_osd_client *osdc;
912
913 if (!osd)
914 return;
915 dout("osd_reset osd%d\n", osd->o_osd);
916 osdc = osd->o_osdc;
f24e9980 917 down_read(&osdc->map_sem);
83aff95e
SW		 918 mutex_lock(&osdc->request_mutex);
919 __kick_osd_requests(osdc, osd);
f9d25199 920 __send_queued(osdc);
83aff95e 921 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 922 up_read(&osdc->map_sem);
923}
924
925/*
926 * Track open sessions with osds.
927 */
e10006f8 928static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 929{
930 struct ceph_osd *osd;
931
932 osd = kzalloc(sizeof(*osd), GFP_NOFS);
933 if (!osd)
934 return NULL;
935
936 atomic_set(&osd->o_ref, 1);
937 osd->o_osdc = osdc;
e10006f8 938 osd->o_osd = onum;
f407731d 939 RB_CLEAR_NODE(&osd->o_node);
f24e9980 940 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 941 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 942 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 943 osd->o_incarnation = 1;
944
b7a9e5dd 945 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 946
422d2cb8 947 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 948 return osd;
949}
950
951static struct ceph_osd *get_osd(struct ceph_osd *osd)
952{
953 if (atomic_inc_not_zero(&osd->o_ref)) {
954 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
955 atomic_read(&osd->o_ref));
956 return osd;
957 } else {
958 dout("get_osd %p FAIL\n", osd);
959 return NULL;
960 }
961}
962
963static void put_osd(struct ceph_osd *osd)
964{
965 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
966 atomic_read(&osd->o_ref) - 1);
a255651d 967 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
79494d1b
SW		 968 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
969
27859f97 970 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 971 kfree(osd);
79494d1b 972 }
f24e9980
SW		 973}
974
975/*
976 * remove an osd from our map
977 */
f5a2041b 978static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 979{
f5a2041b 980 dout("__remove_osd %p\n", osd);
f24e9980
SW		 981 BUG_ON(!list_empty(&osd->o_requests));
982 rb_erase(&osd->o_node, &osdc->osds);
f5a2041b 983 list_del_init(&osd->o_osd_lru);
f24e9980
SW		 984 ceph_con_close(&osd->o_con);
985 put_osd(osd);
986}
987
aca420bc
SW		 988static void remove_all_osds(struct ceph_osd_client *osdc)
989{
048a9d2d 990 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 991 mutex_lock(&osdc->request_mutex);
992 while (!RB_EMPTY_ROOT(&osdc->osds)) {
993 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
994 struct ceph_osd, o_node);
995 __remove_osd(osdc, osd);
996 }
997 mutex_unlock(&osdc->request_mutex);
998}
999
f5a2041b
YS		 1000static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1001 struct ceph_osd *osd)
1002{
1003 dout("__move_osd_to_lru %p\n", osd);
1004 BUG_ON(!list_empty(&osd->o_osd_lru));
1005 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
3d14c5d2 1006 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
f5a2041b
YS		 1007}
1008
1009static void __remove_osd_from_lru(struct ceph_osd *osd)
1010{
1011 dout("__remove_osd_from_lru %p\n", osd);
1012 if (!list_empty(&osd->o_osd_lru))
1013 list_del_init(&osd->o_osd_lru);
1014}
1015
aca420bc 1016static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1017{
1018 struct ceph_osd *osd, *nosd;
1019
1020 dout("__remove_old_osds %p\n", osdc);
1021 mutex_lock(&osdc->request_mutex);
1022 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1023 if (time_before(jiffies, osd->lru_ttl))
f5a2041b
YS		 1024 break;
1025 __remove_osd(osdc, osd);
1026 }
1027 mutex_unlock(&osdc->request_mutex);
1028}
1029
f24e9980
SW		 1030/*
1031 * reset osd connect
1032 */
f5a2041b 1033static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1034{
c3acb181 1035 struct ceph_entity_addr *peer_addr;
f24e9980 1036
f5a2041b 1037 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1038 if (list_empty(&osd->o_requests) &&
1039 list_empty(&osd->o_linger_requests)) {
f5a2041b 1040 __remove_osd(osdc, osd);
c3acb181
AE		 1041
1042 return -ENODEV;
1043 }
1044
1045 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1046 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1047 !ceph_con_opened(&osd->o_con)) {
1048 struct ceph_osd_request *req;
1049
0b4af2e8
ID		 1050 dout("osd addr hasn't changed and connection never opened, "
1051 "letting msgr retry\n");
87b315a5
SW		 1052 /* touch each r_stamp for handle_timeout()'s benfit */
1053 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1054 req->r_stamp = jiffies;
c3acb181
AE		 1055
1056 return -EAGAIN;
f24e9980 1057 }
c3acb181
AE		 1058
1059 ceph_con_close(&osd->o_con);
1060 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1061 osd->o_incarnation++;
1062
1063 return 0;
f24e9980
SW		 1064}
1065
1066static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1067{
1068 struct rb_node **p = &osdc->osds.rb_node;
1069 struct rb_node *parent = NULL;
1070 struct ceph_osd *osd = NULL;
1071
aca420bc 1072 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1073 while (*p) {
1074 parent = *p;
1075 osd = rb_entry(parent, struct ceph_osd, o_node);
1076 if (new->o_osd < osd->o_osd)
1077 p = &(*p)->rb_left;
1078 else if (new->o_osd > osd->o_osd)
1079 p = &(*p)->rb_right;
1080 else
1081 BUG();
1082 }
1083
1084 rb_link_node(&new->o_node, parent, p);
1085 rb_insert_color(&new->o_node, &osdc->osds);
1086}
1087
1088static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1089{
1090 struct ceph_osd *osd;
1091 struct rb_node *n = osdc->osds.rb_node;
1092
1093 while (n) {
1094 osd = rb_entry(n, struct ceph_osd, o_node);
1095 if (o < osd->o_osd)
1096 n = n->rb_left;
1097 else if (o > osd->o_osd)
1098 n = n->rb_right;
1099 else
1100 return osd;
1101 }
1102 return NULL;
1103}
1104
422d2cb8
YS		 1105static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1106{
1107 schedule_delayed_work(&osdc->timeout_work,
3d14c5d2 1108 osdc->client->options->osd_keepalive_timeout * HZ);
422d2cb8
YS		 1109}
1110
1111static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1112{
1113 cancel_delayed_work(&osdc->timeout_work);
1114}
f24e9980
SW		 1115
1116/*
1117 * Register request, assign tid. If this is the first request, set up
1118 * the timeout event.
1119 */
a40c4f10
YS		 1120static void __register_request(struct ceph_osd_client *osdc,
1121 struct ceph_osd_request *req)
f24e9980 1122{
f24e9980 1123 req->r_tid = ++osdc->last_tid;
6df058c0 1124 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1125 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1126 __insert_request(osdc, req);
1127 ceph_osdc_get_request(req);
1128 osdc->num_requests++;
f24e9980 1129 if (osdc->num_requests == 1) {
422d2cb8
YS		 1130 dout(" first request, scheduling timeout\n");
1131 __schedule_osd_timeout(osdc);
f24e9980 1132 }
a40c4f10
YS		 1133}
1134
f24e9980
SW		 1135/*
1136 * called under osdc->request_mutex
1137 */
1138static void __unregister_request(struct ceph_osd_client *osdc,
1139 struct ceph_osd_request *req)
1140{
35f9f8a0
SW		 1141 if (RB_EMPTY_NODE(&req->r_node)) {
1142 dout("__unregister_request %p tid %lld not registered\n",
1143 req, req->r_tid);
1144 return;
1145 }
1146
f24e9980
SW		 1147 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1148 rb_erase(&req->r_node, &osdc->requests);
1149 osdc->num_requests--;
1150
0ba6478d
SW		 1151 if (req->r_osd) {
1152 /* make sure the original request isn't in flight. */
6740a845 1153 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1154
1155 list_del_init(&req->r_osd_item);
a40c4f10
YS		 1156 if (list_empty(&req->r_osd->o_requests) &&
1157 list_empty(&req->r_osd->o_linger_requests)) {
1158 dout("moving osd to %p lru\n", req->r_osd);
f5a2041b 1159 __move_osd_to_lru(osdc, req->r_osd);
a40c4f10 1160 }
fbdb9190 1161 if (list_empty(&req->r_linger_item))
a40c4f10 1162 req->r_osd = NULL;
0ba6478d 1163 }
f24e9980 1164
7d5f2481 1165 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1166 ceph_osdc_put_request(req);
1167
422d2cb8
YS		 1168 if (osdc->num_requests == 0) {
1169 dout(" no requests, canceling timeout\n");
1170 __cancel_osd_timeout(osdc);
f24e9980
SW		 1171 }
1172}
1173
1174/*
1175 * Cancel a previously queued request message
1176 */
1177static void __cancel_request(struct ceph_osd_request *req)
1178{
6bc18876 1179 if (req->r_sent && req->r_osd) {
6740a845 1180 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1181 req->r_sent = 0;
1182 }
1183}
1184
a40c4f10
YS		 1185static void __register_linger_request(struct ceph_osd_client *osdc,
1186 struct ceph_osd_request *req)
1187{
1188 dout("__register_linger_request %p\n", req);
96e4dac6 1189 ceph_osdc_get_request(req);
a40c4f10 1190 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89
SW		 1191 if (req->r_osd)
1192 list_add_tail(&req->r_linger_osd,
1193 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1194}
1195
1196static void __unregister_linger_request(struct ceph_osd_client *osdc,
1197 struct ceph_osd_request *req)
1198{
1199 dout("__unregister_linger_request %p\n", req);
61c74035 1200 list_del_init(&req->r_linger_item);
a40c4f10 1201 if (req->r_osd) {
a40c4f10
YS		 1202 list_del_init(&req->r_linger_osd);
1203
1204 if (list_empty(&req->r_osd->o_requests) &&
1205 list_empty(&req->r_osd->o_linger_requests)) {
1206 dout("moving osd to %p lru\n", req->r_osd);
1207 __move_osd_to_lru(osdc, req->r_osd);
1208 }
fbdb9190
SW		 1209 if (list_empty(&req->r_osd_item))
1210 req->r_osd = NULL;
a40c4f10 1211 }
96e4dac6 1212 ceph_osdc_put_request(req);
a40c4f10
YS		 1213}
1214
1215void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1216 struct ceph_osd_request *req)
1217{
1218 mutex_lock(&osdc->request_mutex);
1219 if (req->r_linger) {
c10ebbf5 1220 req->r_linger = 0;
96e4dac6 1221 __unregister_linger_request(osdc, req);
a40c4f10
YS		 1222 }
1223 mutex_unlock(&osdc->request_mutex);
1224}
1225EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1226
1227void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1228 struct ceph_osd_request *req)
1229{
1230 if (!req->r_linger) {
1231 dout("set_request_linger %p\n", req);
1232 req->r_linger = 1;
a40c4f10
YS		 1233 }
1234}
1235EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1236
d29adb34
JD		 1237/*
1238 * Returns whether a request should be blocked from being sent
1239 * based on the current osdmap and osd_client settings.
1240 *
1241 * Caller should hold map_sem for read.
1242 */
1243static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1244 struct ceph_osd_request *req)
1245{
1246 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1247 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1248 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1249 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1250 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1251}
1252
17a13e40
ID		 1253/*
1254 * Calculate mapping of a request to a PG. Takes tiering into account.
1255 */
1256static int __calc_request_pg(struct ceph_osdmap *osdmap,
1257 struct ceph_osd_request *req,
1258 struct ceph_pg *pg_out)
1259{
205ee118
ID		 1260 bool need_check_tiering;
1261
1262 need_check_tiering = false;
1263 if (req->r_target_oloc.pool == -1) {
1264 req->r_target_oloc = req->r_base_oloc; /* struct */
1265 need_check_tiering = true;
1266 }
1267 if (req->r_target_oid.name_len == 0) {
1268 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1269 need_check_tiering = true;
1270 }
1271
1272 if (need_check_tiering &&
1273 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
17a13e40
ID		 1274 struct ceph_pg_pool_info *pi;
1275
205ee118 1276 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
17a13e40
ID		 1277 if (pi) {
1278 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1279 pi->read_tier >= 0)
205ee118 1280 req->r_target_oloc.pool = pi->read_tier;
17a13e40
ID		 1281 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1282 pi->write_tier >= 0)
205ee118 1283 req->r_target_oloc.pool = pi->write_tier;
17a13e40
ID		 1284 }
1285 /* !pi is caught in ceph_oloc_oid_to_pg() */
1286 }
1287
205ee118
ID		 1288 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1289 &req->r_target_oid, pg_out);
17a13e40
ID		 1290}
1291
f24e9980
SW		 1292/*
1293 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1294 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1295 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1296 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1297 *
1298 * Return 0 if unchanged, 1 if changed, or negative on error.
1299 *
1300 * Caller should hold map_sem for read and request_mutex.
1301 */
6f6c7006 1302static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1303 struct ceph_osd_request *req, int force_resend)
f24e9980 1304{
5b191d99 1305 struct ceph_pg pgid;
d85b7056
SW		 1306 int acting[CEPH_PG_MAX_SIZE];
1307 int o = -1, num = 0;
f24e9980 1308 int err;
d29adb34 1309 bool was_paused;
f24e9980 1310
6f6c7006 1311 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40
ID		 1312
1313 err = __calc_request_pg(osdc->osdmap, req, &pgid);
6f6c7006
SW		 1314 if (err) {
1315 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1316 return err;
6f6c7006 1317 }
7740a42f
SW		 1318 req->r_pgid = pgid;
1319
d85b7056
SW		 1320 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1321 if (err > 0) {
1322 o = acting[0];
1323 num = err;
1324 }
f24e9980 1325
d29adb34
JD		 1326 was_paused = req->r_paused;
1327 req->r_paused = __req_should_be_paused(osdc, req);
1328 if (was_paused && !req->r_paused)
1329 force_resend = 1;
1330
38d6453c
SW		 1331 if ((!force_resend &&
1332 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1333 req->r_sent >= req->r_osd->o_incarnation &&
1334 req->r_num_pg_osds == num &&
1335 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
d29adb34
JD		 1336 (req->r_osd == NULL && o == -1) ||
1337 req->r_paused)
f24e9980
SW		 1338 return 0; /* no change */
1339
5b191d99
SW		 1340 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1341 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1342 req->r_osd ? req->r_osd->o_osd : -1);
1343
d85b7056
SW		 1344 /* record full pg acting set */
1345 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1346 req->r_num_pg_osds = num;
1347
f24e9980
SW		 1348 if (req->r_osd) {
1349 __cancel_request(req);
1350 list_del_init(&req->r_osd_item);
f24e9980
SW		 1351 req->r_osd = NULL;
1352 }
1353
1354 req->r_osd = __lookup_osd(osdc, o);
1355 if (!req->r_osd && o >= 0) {
c99eb1c7 1356 err = -ENOMEM;
e10006f8 1357 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1358 if (!req->r_osd) {
1359 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1360 goto out;
6f6c7006 1361 }
f24e9980 1362
6f6c7006 1363 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1364 __insert_osd(osdc, req->r_osd);
1365
b7a9e5dd
SW		 1366 ceph_con_open(&req->r_osd->o_con,
1367 CEPH_ENTITY_TYPE_OSD, o,
1368 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1369 }
1370
f5a2041b
YS		 1371 if (req->r_osd) {
1372 __remove_osd_from_lru(req->r_osd);
ad885927
AE		 1373 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1374 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
6f6c7006 1375 } else {
ad885927 1376 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
f5a2041b 1377 }
d85b7056 1378 err = 1; /* osd or pg changed */
f24e9980
SW		 1379
1380out:
f24e9980
SW		 1381 return err;
1382}
1383
1384/*
1385 * caller should hold map_sem (for read) and request_mutex
1386 */
56e925b6
SW		 1387static void __send_request(struct ceph_osd_client *osdc,
1388 struct ceph_osd_request *req)
f24e9980 1389{
1b83bef2 1390 void *p;
f24e9980 1391
1b83bef2
SW		 1392 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1393 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1394 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1395
1396 /* fill in message content that changes each time we send it */
1397 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1398 put_unaligned_le32(req->r_flags, req->r_request_flags);
205ee118 1399 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1b83bef2
SW		 1400 p = req->r_request_pgid;
1401 ceph_encode_64(&p, req->r_pgid.pool);
1402 ceph_encode_32(&p, req->r_pgid.seed);
1403 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1404 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1405 sizeof(req->r_reassert_version));
2169aea6 1406
3dd72fc0 1407 req->r_stamp = jiffies;
07a27e22 1408 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1409
1410 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1411
f24e9980 1412 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1413
1414 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1415}
1416
6f6c7006
SW		 1417/*
1418 * Send any requests in the queue (req_unsent).
1419 */
f9d25199 1420static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1421{
1422 struct ceph_osd_request *req, *tmp;
1423
f9d25199
AE		 1424 dout("__send_queued\n");
1425 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1426 __send_request(osdc, req);
6f6c7006
SW		 1427}
1428
f24e9980
SW		 1429/*
1430 * Timeout callback, called every N seconds when 1 or more osd
1431 * requests has been active for more than N seconds. When this
1432 * happens, we ping all OSDs with requests who have timed out to
1433 * ensure any communications channel reset is detected. Reset the
1434 * request timeouts another N seconds in the future as we go.
1435 * Reschedule the timeout event another N seconds in future (unless
1436 * there are no open requests).
1437 */
1438static void handle_timeout(struct work_struct *work)
1439{
1440 struct ceph_osd_client *osdc =
1441 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1442 struct ceph_osd_request *req;
f24e9980 1443 struct ceph_osd *osd;
422d2cb8 1444 unsigned long keepalive =
3d14c5d2 1445 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1446 struct list_head slow_osds;
f24e9980
SW		 1447 dout("timeout\n");
1448 down_read(&osdc->map_sem);
1449
1450 ceph_monc_request_next_osdmap(&osdc->client->monc);
1451
1452 mutex_lock(&osdc->request_mutex);
f24e9980 1453
422d2cb8
YS		 1454 /*
1455 * ping osds that are a bit slow. this ensures that if there
1456 * is a break in the TCP connection we will notice, and reopen
1457 * a connection with that osd (from the fault callback).
1458 */
1459 INIT_LIST_HEAD(&slow_osds);
1460 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1461 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1462 break;
1463
1464 osd = req->r_osd;
1465 BUG_ON(!osd);
1466 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1467 req->r_tid, osd->o_osd);
422d2cb8
YS		 1468 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1469 }
1470 while (!list_empty(&slow_osds)) {
1471 osd = list_entry(slow_osds.next, struct ceph_osd,
1472 o_keepalive_item);
1473 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1474 ceph_con_keepalive(&osd->o_con);
1475 }
1476
422d2cb8 1477 __schedule_osd_timeout(osdc);
f9d25199 1478 __send_queued(osdc);
f24e9980 1479 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1480 up_read(&osdc->map_sem);
1481}
1482
f5a2041b
YS		 1483static void handle_osds_timeout(struct work_struct *work)
1484{
1485 struct ceph_osd_client *osdc =
1486 container_of(work, struct ceph_osd_client,
1487 osds_timeout_work.work);
1488 unsigned long delay =
3d14c5d2 1489 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1490
1491 dout("osds timeout\n");
1492 down_read(&osdc->map_sem);
aca420bc 1493 remove_old_osds(osdc);
f5a2041b
YS		 1494 up_read(&osdc->map_sem);
1495
1496 schedule_delayed_work(&osdc->osds_timeout_work,
1497 round_jiffies_relative(delay));
1498}
1499
205ee118
ID		 1500static int ceph_oloc_decode(void **p, void *end,
1501 struct ceph_object_locator *oloc)
1502{
1503 u8 struct_v, struct_cv;
1504 u32 len;
1505 void *struct_end;
1506 int ret = 0;
1507
1508 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1509 struct_v = ceph_decode_8(p);
1510 struct_cv = ceph_decode_8(p);
1511 if (struct_v < 3) {
1512 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1513 struct_v, struct_cv);
1514 goto e_inval;
1515 }
1516 if (struct_cv > 6) {
1517 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1518 struct_v, struct_cv);
1519 goto e_inval;
1520 }
1521 len = ceph_decode_32(p);
1522 ceph_decode_need(p, end, len, e_inval);
1523 struct_end = *p + len;
1524
1525 oloc->pool = ceph_decode_64(p);
1526 *p += 4; /* skip preferred */
1527
1528 len = ceph_decode_32(p);
1529 if (len > 0) {
1530 pr_warn("ceph_object_locator::key is set\n");
1531 goto e_inval;
1532 }
1533
1534 if (struct_v >= 5) {
1535 len = ceph_decode_32(p);
1536 if (len > 0) {
1537 pr_warn("ceph_object_locator::nspace is set\n");
1538 goto e_inval;
1539 }
1540 }
1541
1542 if (struct_v >= 6) {
1543 s64 hash = ceph_decode_64(p);
1544 if (hash != -1) {
1545 pr_warn("ceph_object_locator::hash is set\n");
1546 goto e_inval;
1547 }
1548 }
1549
1550 /* skip the rest */
1551 *p = struct_end;
1552out:
1553 return ret;
1554
1555e_inval:
1556 ret = -EINVAL;
1557 goto out;
1558}
1559
1560static int ceph_redirect_decode(void **p, void *end,
1561 struct ceph_request_redirect *redir)
1562{
1563 u8 struct_v, struct_cv;
1564 u32 len;
1565 void *struct_end;
1566 int ret;
1567
1568 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1569 struct_v = ceph_decode_8(p);
1570 struct_cv = ceph_decode_8(p);
1571 if (struct_cv > 1) {
1572 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1573 struct_v, struct_cv);
1574 goto e_inval;
1575 }
1576 len = ceph_decode_32(p);
1577 ceph_decode_need(p, end, len, e_inval);
1578 struct_end = *p + len;
1579
1580 ret = ceph_oloc_decode(p, end, &redir->oloc);
1581 if (ret)
1582 goto out;
1583
1584 len = ceph_decode_32(p);
1585 if (len > 0) {
1586 pr_warn("ceph_request_redirect::object_name is set\n");
1587 goto e_inval;
1588 }
1589
1590 len = ceph_decode_32(p);
1591 *p += len; /* skip osd_instructions */
1592
1593 /* skip the rest */
1594 *p = struct_end;
1595out:
1596 return ret;
1597
1598e_inval:
1599 ret = -EINVAL;
1600 goto out;
1601}
1602
25845472
SW		 1603static void complete_request(struct ceph_osd_request *req)
1604{
25845472
SW		 1605 complete_all(&req->r_safe_completion); /* fsync waiter */
1606}
1607
f24e9980
SW		 1608/*
1609 * handle osd op reply. either call the callback if it is specified,
1610 * or do the completion to wake up the waiting thread.
1611 */
350b1c32
SW		 1612static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1613 struct ceph_connection *con)
f24e9980 1614{
1b83bef2 1615 void *p, *end;
f24e9980 1616 struct ceph_osd_request *req;
205ee118 1617 struct ceph_request_redirect redir;
f24e9980 1618 u64 tid;
1b83bef2 1619 int object_len;
79528734
AE		 1620 unsigned int numops;
1621 int payload_len, flags;
0ceed5db 1622 s32 result;
1b83bef2
SW		 1623 s32 retry_attempt;
1624 struct ceph_pg pg;
1625 int err;
1626 u32 reassert_epoch;
1627 u64 reassert_version;
1628 u32 osdmap_epoch;
0d5af164 1629 int already_completed;
9fc6e064 1630 u32 bytes;
79528734 1631 unsigned int i;
f24e9980 1632
6df058c0 1633 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1634 dout("handle_reply %p tid %llu\n", msg, tid);
1635
1636 p = msg->front.iov_base;
1637 end = p + msg->front.iov_len;
1638
1639 ceph_decode_need(&p, end, 4, bad);
1640 object_len = ceph_decode_32(&p);
1641 ceph_decode_need(&p, end, object_len, bad);
1642 p += object_len;
1643
ef4859d6 1644 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1645 if (err)
f24e9980 1646 goto bad;
1b83bef2
SW		 1647
1648 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1649 flags = ceph_decode_64(&p);
1650 result = ceph_decode_32(&p);
1651 reassert_epoch = ceph_decode_32(&p);
1652 reassert_version = ceph_decode_64(&p);
1653 osdmap_epoch = ceph_decode_32(&p);
1654
f24e9980
SW		 1655 /* lookup */
1656 mutex_lock(&osdc->request_mutex);
1657 req = __lookup_request(osdc, tid);
1658 if (req == NULL) {
1659 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1660 goto bad_mutex;
f24e9980
SW		 1661 }
1662 ceph_osdc_get_request(req);
1b83bef2
SW		 1663
1664 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1665 req, result);
1666
18741196 1667 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2
SW		 1668 numops = ceph_decode_32(&p);
1669 if (numops > CEPH_OSD_MAX_OP)
1670 goto bad_put;
1671 if (numops != req->r_num_ops)
1672 goto bad_put;
1673 payload_len = 0;
18741196 1674 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1675 for (i = 0; i < numops; i++) {
1676 struct ceph_osd_op *op = p;
1677 int len;
1678
1679 len = le32_to_cpu(op->payload_len);
1680 req->r_reply_op_len[i] = len;
1681 dout(" op %d has %d bytes\n", i, len);
1682 payload_len += len;
1683 p += sizeof(*op);
1684 }
9fc6e064
AE		 1685 bytes = le32_to_cpu(msg->hdr.data_len);
1686 if (payload_len != bytes) {
1b83bef2 1687 pr_warning("sum of op payload lens %d != data_len %d",
9fc6e064 1688 payload_len, bytes);
1b83bef2
SW		 1689 goto bad_put;
1690 }
1691
18741196 1692 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1693 retry_attempt = ceph_decode_32(&p);
1694 for (i = 0; i < numops; i++)
1695 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1696
205ee118
ID		 1697 if (le16_to_cpu(msg->hdr.version) >= 6) {
1698 p += 8 + 4; /* skip replay_version */
1699 p += 8; /* skip user_version */
eb845ff1 1700
205ee118
ID		 1701 err = ceph_redirect_decode(&p, end, &redir);
1702 if (err)
1703 goto bad_put;
1704 } else {
1705 redir.oloc.pool = -1;
1706 }
f24e9980 1707
205ee118
ID		 1708 if (redir.oloc.pool != -1) {
1709 dout("redirect pool %lld\n", redir.oloc.pool);
1710
1711 __unregister_request(osdc, req);
1712 mutex_unlock(&osdc->request_mutex);
1713
1714 req->r_target_oloc = redir.oloc; /* struct */
1715
1716 /*
1717 * Start redirect requests with nofail=true. If
1718 * mapping fails, request will end up on the notarget
1719 * list, waiting for the new osdmap (which can take
1720 * a while), even though the original request mapped
1721 * successfully. In the future we might want to follow
1722 * original request's nofail setting here.
1723 */
1724 err = ceph_osdc_start_request(osdc, req, true);
1725 BUG_ON(err);
1726
1727 goto done;
1728 }
1729
1730 already_completed = req->r_got_reply;
1731 if (!req->r_got_reply) {
1b83bef2 1732 req->r_result = result;
f24e9980
SW		 1733 dout("handle_reply result %d bytes %d\n", req->r_result,
1734 bytes);
1735 if (req->r_result == 0)
1736 req->r_result = bytes;
1737
1738 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1739 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1740 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1741
1742 req->r_got_reply = 1;
1743 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1744 dout("handle_reply tid %llu dup ack\n", tid);
34b43a56 1745 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1746 goto done;
1747 }
1748
1749 dout("handle_reply tid %llu flags %d\n", tid, flags);
1750
a40c4f10
YS		 1751 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1752 __register_linger_request(osdc, req);
1753
f24e9980 1754 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1755 if (result < 0 ||
1756 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1757 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1758 __unregister_request(osdc, req);
1759
1760 mutex_unlock(&osdc->request_mutex);
1761
eb845ff1 1762 if (!already_completed) {
61c5d6bf
YZ		 1763 if (req->r_unsafe_callback &&
1764 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1765 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1766 if (req->r_callback)
1767 req->r_callback(req, msg);
1768 else
1769 complete_all(&req->r_completion);
1770 }
f24e9980 1771
61c5d6bf
YZ		 1772 if (flags & CEPH_OSD_FLAG_ONDISK) {
1773 if (req->r_unsafe_callback && already_completed)
1774 req->r_unsafe_callback(req, false);
25845472 1775 complete_request(req);
61c5d6bf 1776 }
f24e9980
SW		 1777
1778done:
a40c4f10 1779 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1780 ceph_osdc_put_request(req);
1781 return;
1782
1b83bef2 1783bad_put:
37c89bde
LW		 1784 req->r_result = -EIO;
1785 __unregister_request(osdc, req);
1786 if (req->r_callback)
1787 req->r_callback(req, msg);
1788 else
1789 complete_all(&req->r_completion);
1790 complete_request(req);
1b83bef2 1791 ceph_osdc_put_request(req);
8058fd45
AE		 1792bad_mutex:
1793 mutex_unlock(&osdc->request_mutex);
f24e9980 1794bad:
1b83bef2
SW		 1795 pr_err("corrupt osd_op_reply got %d %d\n",
1796 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1797 ceph_msg_dump(msg);
f24e9980
SW		 1798}
1799
6f6c7006 1800static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1801{
f24e9980 1802 struct rb_node *p, *n;
f24e9980 1803
6f6c7006
SW		 1804 for (p = rb_first(&osdc->osds); p; p = n) {
1805 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1806
6f6c7006
SW		 1807 n = rb_next(p);
1808 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1809 memcmp(&osd->o_con.peer_addr,
1810 ceph_osd_addr(osdc->osdmap,
1811 osd->o_osd),
1812 sizeof(struct ceph_entity_addr)) != 0)
1813 __reset_osd(osdc, osd);
f24e9980 1814 }
422d2cb8
YS		 1815}
1816
1817/*
6f6c7006
SW		 1818 * Requeue requests whose mapping to an OSD has changed. If requests map to
1819 * no osd, request a new map.
422d2cb8 1820 *
e6d50f67 1821 * Caller should hold map_sem for read.
422d2cb8 1822 */
9a1ea2db
JD		 1823static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1824 bool force_resend_writes)
422d2cb8 1825{
a40c4f10 1826 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1827 struct rb_node *p;
1828 int needmap = 0;
1829 int err;
9a1ea2db 1830 bool force_resend_req;
422d2cb8 1831
9a1ea2db
JD		 1832 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1833 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1834 mutex_lock(&osdc->request_mutex);
6194ea89 1835 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1836 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1837 p = rb_next(p);
ab60b16d
AE		 1838
1839 /*
1840 * For linger requests that have not yet been
1841 * registered, move them to the linger list; they'll
1842 * be sent to the osd in the loop below. Unregister
1843 * the request before re-registering it as a linger
1844 * request to ensure the __map_request() below
1845 * will decide it needs to be sent.
1846 */
1847 if (req->r_linger && list_empty(&req->r_linger_item)) {
1848 dout("%p tid %llu restart on osd%d\n",
1849 req, req->r_tid,
1850 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 1851 ceph_osdc_get_request(req);
ab60b16d
AE		 1852 __unregister_request(osdc, req);
1853 __register_linger_request(osdc, req);
96e4dac6 1854 ceph_osdc_put_request(req);
ab60b16d
AE		 1855 continue;
1856 }
1857
9a1ea2db
JD		 1858 force_resend_req = force_resend ||
1859 (force_resend_writes &&
1860 req->r_flags & CEPH_OSD_FLAG_WRITE);
1861 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 1862 if (err < 0)
1863 continue; /* error */
1864 if (req->r_osd == NULL) {
1865 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1866 needmap++; /* request a newer map */
1867 } else if (err > 0) {
6194ea89
SW		 1868 if (!req->r_linger) {
1869 dout("%p tid %llu requeued on osd%d\n", req,
1870 req->r_tid,
1871 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1872 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1873 }
1874 }
a40c4f10
YS		 1875 }
1876
1877 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1878 r_linger_item) {
1879 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1880
9a1ea2db
JD		 1881 err = __map_request(osdc, req,
1882 force_resend || force_resend_writes);
ab60b16d 1883 dout("__map_request returned %d\n", err);
a40c4f10
YS		 1884 if (err == 0)
1885 continue; /* no change and no osd was specified */
1886 if (err < 0)
1887 continue; /* hrm! */
1888 if (req->r_osd == NULL) {
1889 dout("tid %llu maps to no valid osd\n", req->r_tid);
1890 needmap++; /* request a newer map */
1891 continue;
6f6c7006 1892 }
a40c4f10
YS		 1893
1894 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1895 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1896 __register_request(osdc, req);
c89ce05e 1897 __unregister_linger_request(osdc, req);
6f6c7006 1898 }
14d2f38d 1899 reset_changed_osds(osdc);
f24e9980
SW		 1900 mutex_unlock(&osdc->request_mutex);
1901
1902 if (needmap) {
1903 dout("%d requests for down osds, need new map\n", needmap);
1904 ceph_monc_request_next_osdmap(&osdc->client->monc);
1905 }
422d2cb8 1906}
6f6c7006
SW		 1907
1908
f24e9980
SW		 1909/*
1910 * Process updated osd map.
1911 *
1912 * The message contains any number of incremental and full maps, normally
1913 * indicating some sort of topology change in the cluster. Kick requests
1914 * off to different OSDs as needed.
1915 */
1916void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1917{
1918 void *p, *end, *next;
1919 u32 nr_maps, maplen;
1920 u32 epoch;
1921 struct ceph_osdmap *newmap = NULL, *oldmap;
1922 int err;
1923 struct ceph_fsid fsid;
9a1ea2db 1924 bool was_full;
f24e9980
SW		 1925
1926 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1927 p = msg->front.iov_base;
1928 end = p + msg->front.iov_len;
1929
1930 /* verify fsid */
1931 ceph_decode_need(&p, end, sizeof(fsid), bad);
1932 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 1933 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1934 return;
f24e9980
SW		 1935
1936 down_write(&osdc->map_sem);
1937
9a1ea2db
JD		 1938 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1939
f24e9980
SW		 1940 /* incremental maps */
1941 ceph_decode_32_safe(&p, end, nr_maps, bad);
1942 dout(" %d inc maps\n", nr_maps);
1943 while (nr_maps > 0) {
1944 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 1945 epoch = ceph_decode_32(&p);
1946 maplen = ceph_decode_32(&p);
f24e9980
SW		 1947 ceph_decode_need(&p, end, maplen, bad);
1948 next = p + maplen;
1949 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1950 dout("applying incremental map %u len %d\n",
1951 epoch, maplen);
1952 newmap = osdmap_apply_incremental(&p, next,
1953 osdc->osdmap,
15d9882c 1954 &osdc->client->msgr);
f24e9980
SW		 1955 if (IS_ERR(newmap)) {
1956 err = PTR_ERR(newmap);
1957 goto bad;
1958 }
30dc6381 1959 BUG_ON(!newmap);
f24e9980
SW		 1960 if (newmap != osdc->osdmap) {
1961 ceph_osdmap_destroy(osdc->osdmap);
1962 osdc->osdmap = newmap;
1963 }
9a1ea2db
JD		 1964 was_full = was_full ||
1965 ceph_osdmap_flag(osdc->osdmap,
1966 CEPH_OSDMAP_FULL);
1967 kick_requests(osdc, 0, was_full);
f24e9980
SW		 1968 } else {
1969 dout("ignoring incremental map %u len %d\n",
1970 epoch, maplen);
1971 }
1972 p = next;
1973 nr_maps--;
1974 }
1975 if (newmap)
1976 goto done;
1977
1978 /* full maps */
1979 ceph_decode_32_safe(&p, end, nr_maps, bad);
1980 dout(" %d full maps\n", nr_maps);
1981 while (nr_maps) {
1982 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 1983 epoch = ceph_decode_32(&p);
1984 maplen = ceph_decode_32(&p);
f24e9980
SW		 1985 ceph_decode_need(&p, end, maplen, bad);
1986 if (nr_maps > 1) {
1987 dout("skipping non-latest full map %u len %d\n",
1988 epoch, maplen);
1989 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1990 dout("skipping full map %u len %d, "
1991 "older than our %u\n", epoch, maplen,
1992 osdc->osdmap->epoch);
1993 } else {
38d6453c
SW		 1994 int skipped_map = 0;
1995
f24e9980
SW		 1996 dout("taking full map %u len %d\n", epoch, maplen);
1997 newmap = osdmap_decode(&p, p+maplen);
1998 if (IS_ERR(newmap)) {
1999 err = PTR_ERR(newmap);
2000 goto bad;
2001 }
30dc6381 2002 BUG_ON(!newmap);
f24e9980
SW		 2003 oldmap = osdc->osdmap;
2004 osdc->osdmap = newmap;
38d6453c
SW		 2005 if (oldmap) {
2006 if (oldmap->epoch + 1 < newmap->epoch)
2007 skipped_map = 1;
f24e9980 2008 ceph_osdmap_destroy(oldmap);
38d6453c 2009 }
9a1ea2db
JD		 2010 was_full = was_full ||
2011 ceph_osdmap_flag(osdc->osdmap,
2012 CEPH_OSDMAP_FULL);
2013 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2014 }
2015 p += maplen;
2016 nr_maps--;
2017 }
2018
b72e19b9
DC		 2019 if (!osdc->osdmap)
2020 goto bad;
f24e9980
SW		 2021done:
2022 downgrade_write(&osdc->map_sem);
2023 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 2024
2025 /*
2026 * subscribe to subsequent osdmap updates if full to ensure
2027 * we find out when we are no longer full and stop returning
2028 * ENOSPC.
2029 */
d29adb34
JD		 2030 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2031 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2032 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2033 ceph_monc_request_next_osdmap(&osdc->client->monc);
2034
f9d25199
AE		 2035 mutex_lock(&osdc->request_mutex);
2036 __send_queued(osdc);
2037 mutex_unlock(&osdc->request_mutex);
f24e9980 2038 up_read(&osdc->map_sem);
03066f23 2039 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2040 return;
2041
2042bad:
2043 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2044 ceph_msg_dump(msg);
f24e9980
SW		 2045 up_write(&osdc->map_sem);
2046 return;
2047}
2048
a40c4f10
YS		 2049/*
2050 * watch/notify callback event infrastructure
2051 *
2052 * These callbacks are used both for watch and notify operations.
2053 */
2054static void __release_event(struct kref *kref)
2055{
2056 struct ceph_osd_event *event =
2057 container_of(kref, struct ceph_osd_event, kref);
2058
2059 dout("__release_event %p\n", event);
2060 kfree(event);
2061}
2062
2063static void get_event(struct ceph_osd_event *event)
2064{
2065 kref_get(&event->kref);
2066}
2067
2068void ceph_osdc_put_event(struct ceph_osd_event *event)
2069{
2070 kref_put(&event->kref, __release_event);
2071}
2072EXPORT_SYMBOL(ceph_osdc_put_event);
2073
2074static void __insert_event(struct ceph_osd_client *osdc,
2075 struct ceph_osd_event *new)
2076{
2077 struct rb_node **p = &osdc->event_tree.rb_node;
2078 struct rb_node *parent = NULL;
2079 struct ceph_osd_event *event = NULL;
2080
2081 while (*p) {
2082 parent = *p;
2083 event = rb_entry(parent, struct ceph_osd_event, node);
2084 if (new->cookie < event->cookie)
2085 p = &(*p)->rb_left;
2086 else if (new->cookie > event->cookie)
2087 p = &(*p)->rb_right;
2088 else
2089 BUG();
2090 }
2091
2092 rb_link_node(&new->node, parent, p);
2093 rb_insert_color(&new->node, &osdc->event_tree);
2094}
2095
2096static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2097 u64 cookie)
2098{
2099 struct rb_node **p = &osdc->event_tree.rb_node;
2100 struct rb_node *parent = NULL;
2101 struct ceph_osd_event *event = NULL;
2102
2103 while (*p) {
2104 parent = *p;
2105 event = rb_entry(parent, struct ceph_osd_event, node);
2106 if (cookie < event->cookie)
2107 p = &(*p)->rb_left;
2108 else if (cookie > event->cookie)
2109 p = &(*p)->rb_right;
2110 else
2111 return event;
2112 }
2113 return NULL;
2114}
2115
2116static void __remove_event(struct ceph_osd_event *event)
2117{
2118 struct ceph_osd_client *osdc = event->osdc;
2119
2120 if (!RB_EMPTY_NODE(&event->node)) {
2121 dout("__remove_event removed %p\n", event);
2122 rb_erase(&event->node, &osdc->event_tree);
2123 ceph_osdc_put_event(event);
2124 } else {
2125 dout("__remove_event didn't remove %p\n", event);
2126 }
2127}
2128
2129int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2130 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2131 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2132{
2133 struct ceph_osd_event *event;
2134
2135 event = kmalloc(sizeof(*event), GFP_NOIO);
2136 if (!event)
2137 return -ENOMEM;
2138
2139 dout("create_event %p\n", event);
2140 event->cb = event_cb;
3c663bbd 2141 event->one_shot = 0;
a40c4f10
YS		 2142 event->data = data;
2143 event->osdc = osdc;
2144 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2145 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2146 kref_init(&event->kref); /* one ref for us */
2147 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2148
2149 spin_lock(&osdc->event_lock);
2150 event->cookie = ++osdc->event_count;
2151 __insert_event(osdc, event);
2152 spin_unlock(&osdc->event_lock);
2153
2154 *pevent = event;
2155 return 0;
2156}
2157EXPORT_SYMBOL(ceph_osdc_create_event);
2158
2159void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2160{
2161 struct ceph_osd_client *osdc = event->osdc;
2162
2163 dout("cancel_event %p\n", event);
2164 spin_lock(&osdc->event_lock);
2165 __remove_event(event);
2166 spin_unlock(&osdc->event_lock);
2167 ceph_osdc_put_event(event); /* caller's */
2168}
2169EXPORT_SYMBOL(ceph_osdc_cancel_event);
2170
2171
2172static void do_event_work(struct work_struct *work)
2173{
2174 struct ceph_osd_event_work *event_work =
2175 container_of(work, struct ceph_osd_event_work, work);
2176 struct ceph_osd_event *event = event_work->event;
2177 u64 ver = event_work->ver;
2178 u64 notify_id = event_work->notify_id;
2179 u8 opcode = event_work->opcode;
2180
2181 dout("do_event_work completing %p\n", event);
2182 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2183 dout("do_event_work completed %p\n", event);
2184 ceph_osdc_put_event(event);
2185 kfree(event_work);
2186}
2187
2188
2189/*
2190 * Process osd watch notifications
2191 */
3c663bbd
AE		 2192static void handle_watch_notify(struct ceph_osd_client *osdc,
2193 struct ceph_msg *msg)
a40c4f10
YS		 2194{
2195 void *p, *end;
2196 u8 proto_ver;
2197 u64 cookie, ver, notify_id;
2198 u8 opcode;
2199 struct ceph_osd_event *event;
2200 struct ceph_osd_event_work *event_work;
2201
2202 p = msg->front.iov_base;
2203 end = p + msg->front.iov_len;
2204
2205 ceph_decode_8_safe(&p, end, proto_ver, bad);
2206 ceph_decode_8_safe(&p, end, opcode, bad);
2207 ceph_decode_64_safe(&p, end, cookie, bad);
2208 ceph_decode_64_safe(&p, end, ver, bad);
2209 ceph_decode_64_safe(&p, end, notify_id, bad);
2210
2211 spin_lock(&osdc->event_lock);
2212 event = __find_event(osdc, cookie);
2213 if (event) {
3c663bbd 2214 BUG_ON(event->one_shot);
a40c4f10 2215 get_event(event);
a40c4f10
YS		 2216 }
2217 spin_unlock(&osdc->event_lock);
2218 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2219 cookie, ver, event);
2220 if (event) {
2221 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10
YS		 2222 if (!event_work) {
2223 dout("ERROR: could not allocate event_work\n");
2224 goto done_err;
2225 }
6b0ae409 2226 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2227 event_work->event = event;
2228 event_work->ver = ver;
2229 event_work->notify_id = notify_id;
2230 event_work->opcode = opcode;
2231 if (!queue_work(osdc->notify_wq, &event_work->work)) {
2232 dout("WARNING: failed to queue notify event work\n");
2233 goto done_err;
2234 }
2235 }
2236
2237 return;
2238
2239done_err:
a40c4f10
YS		 2240 ceph_osdc_put_event(event);
2241 return;
2242
2243bad:
2244 pr_err("osdc handle_watch_notify corrupt msg\n");
2245 return;
2246}
2247
e65550fd
AE		 2248/*
2249 * build new request AND message
2250 *
2251 */
2252void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2253 struct ceph_snap_context *snapc, u64 snap_id,
2254 struct timespec *mtime)
2255{
2256 struct ceph_msg *msg = req->r_request;
2257 void *p;
2258 size_t msg_size;
2259 int flags = req->r_flags;
2260 u64 data_len;
2261 unsigned int i;
2262
2263 req->r_snapid = snap_id;
2264 req->r_snapc = ceph_get_snap_context(snapc);
2265
2266 /* encode request */
2267 msg->hdr.version = cpu_to_le16(4);
2268
2269 p = msg->front.iov_base;
2270 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2271 req->r_request_osdmap_epoch = p;
2272 p += 4;
2273 req->r_request_flags = p;
2274 p += 4;
2275 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2276 ceph_encode_timespec(p, mtime);
2277 p += sizeof(struct ceph_timespec);
2278 req->r_request_reassert_version = p;
2279 p += sizeof(struct ceph_eversion); /* will get filled in */
2280
2281 /* oloc */
2282 ceph_encode_8(&p, 4);
2283 ceph_encode_8(&p, 4);
2284 ceph_encode_32(&p, 8 + 4 + 4);
2285 req->r_request_pool = p;
2286 p += 8;
2287 ceph_encode_32(&p, -1); /* preferred */
2288 ceph_encode_32(&p, 0); /* key len */
2289
2290 ceph_encode_8(&p, 1);
2291 req->r_request_pgid = p;
2292 p += 8 + 4;
2293 ceph_encode_32(&p, -1); /* preferred */
2294
2295 /* oid */
3c972c95
ID		 2296 ceph_encode_32(&p, req->r_base_oid.name_len);
2297 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2298 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2299 req->r_base_oid.name, req->r_base_oid.name_len);
2300 p += req->r_base_oid.name_len;
e65550fd
AE		 2301
2302 /* ops--can imply data */
2303 ceph_encode_16(&p, (u16)req->r_num_ops);
2304 data_len = 0;
2305 for (i = 0; i < req->r_num_ops; i++) {
2306 data_len += osd_req_encode_op(req, p, i);
2307 p += sizeof(struct ceph_osd_op);
2308 }
2309
2310 /* snaps */
2311 ceph_encode_64(&p, req->r_snapid);
2312 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2313 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2314 if (req->r_snapc) {
2315 for (i = 0; i < snapc->num_snaps; i++) {
2316 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2317 }
2318 }
2319
2320 req->r_request_attempts = p;
2321 p += 4;
2322
2323 /* data */
2324 if (flags & CEPH_OSD_FLAG_WRITE) {
2325 u16 data_off;
2326
2327 /*
2328 * The header "data_off" is a hint to the receiver
2329 * allowing it to align received data into its
2330 * buffers such that there's no need to re-copy
2331 * it before writing it to disk (direct I/O).
2332 */
2333 data_off = (u16) (off & 0xffff);
2334 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2335 }
2336 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2337
2338 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2339 msg_size = p - msg->front.iov_base;
2340 msg->front.iov_len = msg_size;
2341 msg->hdr.front_len = cpu_to_le32(msg_size);
2342
2343 dout("build_request msg_size was %d\n", (int)msg_size);
2344}
2345EXPORT_SYMBOL(ceph_osdc_build_request);
2346
70636773
AE		 2347/*
2348 * Register request, send initial attempt.
2349 */
2350int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2351 struct ceph_osd_request *req,
2352 bool nofail)
2353{
2354 int rc = 0;
2355
f24e9980
SW		 2356 down_read(&osdc->map_sem);
2357 mutex_lock(&osdc->request_mutex);
dc4b870c 2358 __register_request(osdc, req);
c10ebbf5
AE		 2359 req->r_sent = 0;
2360 req->r_got_reply = 0;
92451b49
AE		 2361 rc = __map_request(osdc, req, 0);
2362 if (rc < 0) {
2363 if (nofail) {
2364 dout("osdc_start_request failed map, "
2365 " will retry %lld\n", req->r_tid);
2366 rc = 0;
73d9f7ee 2367 } else {
2368 __unregister_request(osdc, req);
f24e9980 2369 }
92451b49 2370 goto out_unlock;
f24e9980 2371 }
92451b49
AE		 2372 if (req->r_osd == NULL) {
2373 dout("send_request %p no up osds in pg\n", req);
2374 ceph_monc_request_next_osdmap(&osdc->client->monc);
2375 } else {
7e2766a1 2376 __send_queued(osdc);
92451b49
AE		 2377 }
2378 rc = 0;
234af26f 2379out_unlock:
f24e9980
SW		 2380 mutex_unlock(&osdc->request_mutex);
2381 up_read(&osdc->map_sem);
2382 return rc;
2383}
3d14c5d2 2384EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980
SW		 2385
2386/*
2387 * wait for a request to complete
2388 */
2389int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2390 struct ceph_osd_request *req)
2391{
2392 int rc;
2393
2394 rc = wait_for_completion_interruptible(&req->r_completion);
2395 if (rc < 0) {
2396 mutex_lock(&osdc->request_mutex);
2397 __cancel_request(req);
529cfcc4 2398 __unregister_request(osdc, req);
f24e9980 2399 mutex_unlock(&osdc->request_mutex);
25845472 2400 complete_request(req);
529cfcc4 2401 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
f24e9980
SW		 2402 return rc;
2403 }
2404
2405 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2406 return req->r_result;
2407}
3d14c5d2 2408EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2409
2410/*
2411 * sync - wait for all in-flight requests to flush. avoid starvation.
2412 */
2413void ceph_osdc_sync(struct ceph_osd_client *osdc)
2414{
2415 struct ceph_osd_request *req;
2416 u64 last_tid, next_tid = 0;
2417
2418 mutex_lock(&osdc->request_mutex);
2419 last_tid = osdc->last_tid;
2420 while (1) {
2421 req = __lookup_request_ge(osdc, next_tid);
2422 if (!req)
2423 break;
2424 if (req->r_tid > last_tid)
2425 break;
2426
2427 next_tid = req->r_tid + 1;
2428 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2429 continue;
2430
2431 ceph_osdc_get_request(req);
2432 mutex_unlock(&osdc->request_mutex);
2433 dout("sync waiting on tid %llu (last is %llu)\n",
2434 req->r_tid, last_tid);
2435 wait_for_completion(&req->r_safe_completion);
2436 mutex_lock(&osdc->request_mutex);
2437 ceph_osdc_put_request(req);
2438 }
2439 mutex_unlock(&osdc->request_mutex);
2440 dout("sync done (thru tid %llu)\n", last_tid);
2441}
3d14c5d2 2442EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2443
dd935f44
JD		 2444/*
2445 * Call all pending notify callbacks - for use after a watch is
2446 * unregistered, to make sure no more callbacks for it will be invoked
2447 */
2448extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2449{
2450 flush_workqueue(osdc->notify_wq);
2451}
2452EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2453
2454
f24e9980
SW		 2455/*
2456 * init, shutdown
2457 */
2458int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2459{
2460 int err;
2461
2462 dout("init\n");
2463 osdc->client = client;
2464 osdc->osdmap = NULL;
2465 init_rwsem(&osdc->map_sem);
2466 init_completion(&osdc->map_waiters);
2467 osdc->last_requested_map = 0;
2468 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2469 osdc->last_tid = 0;
2470 osdc->osds = RB_ROOT;
f5a2041b 2471 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2472 osdc->requests = RB_ROOT;
422d2cb8 2473 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2474 INIT_LIST_HEAD(&osdc->req_unsent);
2475 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2476 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2477 osdc->num_requests = 0;
2478 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2479 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2480 spin_lock_init(&osdc->event_lock);
2481 osdc->event_tree = RB_ROOT;
2482 osdc->event_count = 0;
f5a2041b
YS		 2483
2484 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2485 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2486
5f44f142 2487 err = -ENOMEM;
f24e9980
SW		 2488 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2489 sizeof(struct ceph_osd_request));
2490 if (!osdc->req_mempool)
5f44f142 2491 goto out;
f24e9980 2492
d50b409f
SW		 2493 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2494 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2495 "osd_op");
f24e9980 2496 if (err < 0)
5f44f142 2497 goto out_mempool;
d50b409f 2498 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2499 OSD_OPREPLY_FRONT_LEN, 10, true,
2500 "osd_op_reply");
c16e7869
SW		 2501 if (err < 0)
2502 goto out_msgpool;
a40c4f10 2503
dbcae088 2504 err = -ENOMEM;
a40c4f10 2505 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2506 if (!osdc->notify_wq)
a40c4f10 2507 goto out_msgpool;
f24e9980 2508 return 0;
5f44f142 2509
c16e7869
SW		 2510out_msgpool:
2511 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2512out_mempool:
2513 mempool_destroy(osdc->req_mempool);
2514out:
2515 return err;
f24e9980
SW		 2516}
2517
2518void ceph_osdc_stop(struct ceph_osd_client *osdc)
2519{
a40c4f10
YS		 2520 flush_workqueue(osdc->notify_wq);
2521 destroy_workqueue(osdc->notify_wq);
f24e9980 2522 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2523 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2524 if (osdc->osdmap) {
2525 ceph_osdmap_destroy(osdc->osdmap);
2526 osdc->osdmap = NULL;
2527 }
aca420bc 2528 remove_all_osds(osdc);
f24e9980
SW		 2529 mempool_destroy(osdc->req_mempool);
2530 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2531 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2532}
2533
2534/*
2535 * Read some contiguous pages. If we cross a stripe boundary, shorten
2536 * *plen. Return number of bytes read, or error.
2537 */
2538int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2539 struct ceph_vino vino, struct ceph_file_layout *layout,
2540 u64 off, u64 *plen,
2541 u32 truncate_seq, u64 truncate_size,
b7495fc2 2542 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2543{
2544 struct ceph_osd_request *req;
2545 int rc = 0;
2546
2547 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2548 vino.snap, off, *plen);
79528734 2549 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
f24e9980 2550 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2551 NULL, truncate_seq, truncate_size,
153e5167 2552 false);
6816282d
SW		 2553 if (IS_ERR(req))
2554 return PTR_ERR(req);
f24e9980
SW		 2555
2556 /* it may be a short read due to an object boundary */
0fff87ec 2557
406e2c9f 2558 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2559 pages, *plen, page_align, false, false);
f24e9980 2560
e0c59487 2561 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2562 off, *plen, *plen, page_align);
f24e9980 2563
79528734 2564 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2565
f24e9980
SW		 2566 rc = ceph_osdc_start_request(osdc, req, false);
2567 if (!rc)
2568 rc = ceph_osdc_wait_request(osdc, req);
2569
2570 ceph_osdc_put_request(req);
2571 dout("readpages result %d\n", rc);
2572 return rc;
2573}
3d14c5d2 2574EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2575
2576/*
2577 * do a synchronous write on N pages
2578 */
2579int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2580 struct ceph_file_layout *layout,
2581 struct ceph_snap_context *snapc,
2582 u64 off, u64 len,
2583 u32 truncate_seq, u64 truncate_size,
2584 struct timespec *mtime,
24808826 2585 struct page **pages, int num_pages)
f24e9980
SW		 2586{
2587 struct ceph_osd_request *req;
2588 int rc = 0;
b7495fc2 2589 int page_align = off & ~PAGE_MASK;
f24e9980 2590
acead002 2591 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
79528734 2592 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
f24e9980 2593 CEPH_OSD_OP_WRITE,
24808826 2594 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2595 snapc, truncate_seq, truncate_size,
153e5167 2596 true);
6816282d
SW		 2597 if (IS_ERR(req))
2598 return PTR_ERR(req);
f24e9980
SW		 2599
2600 /* it may be a short write due to an object boundary */
406e2c9f 2601 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2602 false, false);
2603 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2604
79528734 2605 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2606
87f979d3 2607 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2608 if (!rc)
2609 rc = ceph_osdc_wait_request(osdc, req);
2610
2611 ceph_osdc_put_request(req);
2612 if (rc == 0)
2613 rc = len;
2614 dout("writepages result %d\n", rc);
2615 return rc;
2616}
3d14c5d2 2617EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2618
5522ae0b
AE		 2619int ceph_osdc_setup(void)
2620{
2621 BUG_ON(ceph_osd_request_cache);
2622 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2623 sizeof (struct ceph_osd_request),
2624 __alignof__(struct ceph_osd_request),
2625 0, NULL);
2626
2627 return ceph_osd_request_cache ? 0 : -ENOMEM;
2628}
2629EXPORT_SYMBOL(ceph_osdc_setup);
2630
2631void ceph_osdc_cleanup(void)
2632{
2633 BUG_ON(!ceph_osd_request_cache);
2634 kmem_cache_destroy(ceph_osd_request_cache);
2635 ceph_osd_request_cache = NULL;
2636}
2637EXPORT_SYMBOL(ceph_osdc_cleanup);
2638
f24e9980
SW		 2639/*
2640 * handle incoming message
2641 */
2642static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2643{
2644 struct ceph_osd *osd = con->private;
32c895e7 2645 struct ceph_osd_client *osdc;
f24e9980
SW		 2646 int type = le16_to_cpu(msg->hdr.type);
2647
2648 if (!osd)
4a32f93d 2649 goto out;
32c895e7 2650 osdc = osd->o_osdc;
f24e9980
SW		 2651
2652 switch (type) {
2653 case CEPH_MSG_OSD_MAP:
2654 ceph_osdc_handle_map(osdc, msg);
2655 break;
2656 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2657 handle_reply(osdc, msg, con);
f24e9980 2658 break;
a40c4f10
YS		 2659 case CEPH_MSG_WATCH_NOTIFY:
2660 handle_watch_notify(osdc, msg);
2661 break;
f24e9980
SW		 2662
2663 default:
2664 pr_err("received unknown message type %d %s\n", type,
2665 ceph_msg_type_name(type));
2666 }
4a32f93d 2667out:
f24e9980
SW		 2668 ceph_msg_put(msg);
2669}
2670
5b3a4db3 2671/*
21b667f6
SW		 2672 * lookup and return message for incoming reply. set up reply message
2673 * pages.
5b3a4db3
SW		 2674 */
2675static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2676 struct ceph_msg_header *hdr,
2677 int *skip)
f24e9980
SW		 2678{
2679 struct ceph_osd *osd = con->private;
2680 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2681 struct ceph_msg *m;
0547a9b3 2682 struct ceph_osd_request *req;
3f0a4ac5 2683 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2684 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2685 u64 tid;
f24e9980 2686
0547a9b3
YS		 2687 tid = le64_to_cpu(hdr->tid);
2688 mutex_lock(&osdc->request_mutex);
2689 req = __lookup_request(osdc, tid);
2690 if (!req) {
2691 *skip = 1;
2692 m = NULL;
756a16a5
SW		 2693 dout("get_reply unknown tid %llu from osd%d\n", tid,
2694 osd->o_osd);
0547a9b3
YS		 2695 goto out;
2696 }
c16e7869 2697
ace6d3a9 2698 if (req->r_reply->con)
8921d114 2699 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2700 req->r_reply, req->r_reply->con);
2701 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2702
f2be82b0 2703 if (front_len > req->r_reply->front_alloc_len) {
4974341e 2704 pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
f2be82b0 2705 front_len, req->r_reply->front_alloc_len,
4974341e
AE		 2706 (unsigned int)con->peer_name.type,
2707 le64_to_cpu(con->peer_name.num));
3f0a4ac5
ID		 2708 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2709 false);
a79832f2 2710 if (!m)
c16e7869
SW		 2711 goto out;
2712 ceph_msg_put(req->r_reply);
2713 req->r_reply = m;
2714 }
2715 m = ceph_msg_get(req->r_reply);
2716
0547a9b3 2717 if (data_len > 0) {
a4ce40a9 2718 struct ceph_osd_data *osd_data;
0fff87ec 2719
a4ce40a9
AE		 2720 /*
2721 * XXX This is assuming there is only one op containing
2722 * XXX page data. Probably OK for reads, but this
2723 * XXX ought to be done more generally.
2724 */
406e2c9f 2725 osd_data = osd_req_op_extent_osd_data(req, 0);
0fff87ec 2726 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2727 if (osd_data->pages &&
e0c59487 2728 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2729
e0c59487
AE		 2730 pr_warning("tid %lld reply has %d bytes "
2731 "we had only %llu bytes ready\n",
2732 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2733 *skip = 1;
2734 ceph_msg_put(m);
2735 m = NULL;
2736 goto out;
2737 }
2ac2b7a6 2738 }
0547a9b3 2739 }
5b3a4db3 2740 *skip = 0;
c16e7869 2741 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2742
2743out:
2744 mutex_unlock(&osdc->request_mutex);
2450418c 2745 return m;
5b3a4db3
SW		 2746
2747}
2748
2749static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2750 struct ceph_msg_header *hdr,
2751 int *skip)
2752{
2753 struct ceph_osd *osd = con->private;
2754 int type = le16_to_cpu(hdr->type);
2755 int front = le32_to_cpu(hdr->front_len);
2756
1c20f2d2 2757 *skip = 0;
5b3a4db3
SW		 2758 switch (type) {
2759 case CEPH_MSG_OSD_MAP:
a40c4f10 2760 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2761 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2762 case CEPH_MSG_OSD_OPREPLY:
2763 return get_reply(con, hdr, skip);
2764 default:
2765 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2766 osd->o_osd);
2767 *skip = 1;
2768 return NULL;
2769 }
f24e9980
SW		 2770}
2771
2772/*
2773 * Wrappers to refcount containing ceph_osd struct
2774 */
2775static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2776{
2777 struct ceph_osd *osd = con->private;
2778 if (get_osd(osd))
2779 return con;
2780 return NULL;
2781}
2782
2783static void put_osd_con(struct ceph_connection *con)
2784{
2785 struct ceph_osd *osd = con->private;
2786 put_osd(osd);
2787}
2788
4e7a5dcd
SW		 2789/*
2790 * authentication
2791 */
a3530df3
AE		 2792/*
2793 * Note: returned pointer is the address of a structure that's
2794 * managed separately. Caller must *not* attempt to free it.
2795 */
2796static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2797 int *proto, int force_new)
4e7a5dcd
SW		 2798{
2799 struct ceph_osd *o = con->private;
2800 struct ceph_osd_client *osdc = o->o_osdc;
2801 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2802 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2803
74f1869f 2804 if (force_new && auth->authorizer) {
27859f97 2805 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2806 auth->authorizer = NULL;
2807 }
27859f97
SW		 2808 if (!auth->authorizer) {
2809 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2810 auth);
4e7a5dcd 2811 if (ret)
a3530df3 2812 return ERR_PTR(ret);
27859f97
SW		 2813 } else {
2814 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2815 auth);
2816 if (ret)
2817 return ERR_PTR(ret);
4e7a5dcd 2818 }
4e7a5dcd 2819 *proto = ac->protocol;
74f1869f 2820
a3530df3 2821 return auth;
4e7a5dcd
SW		 2822}
2823
2824
2825static int verify_authorizer_reply(struct ceph_connection *con, int len)
2826{
2827 struct ceph_osd *o = con->private;
2828 struct ceph_osd_client *osdc = o->o_osdc;
2829 struct ceph_auth_client *ac = osdc->client->monc.auth;
2830
27859f97 2831 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2832}
2833
9bd2e6f8
SW		 2834static int invalidate_authorizer(struct ceph_connection *con)
2835{
2836 struct ceph_osd *o = con->private;
2837 struct ceph_osd_client *osdc = o->o_osdc;
2838 struct ceph_auth_client *ac = osdc->client->monc.auth;
2839
27859f97 2840 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2841 return ceph_monc_validate_auth(&osdc->client->monc);
2842}
4e7a5dcd 2843
9e32789f 2844static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2845 .get = get_osd_con,
2846 .put = put_osd_con,
2847 .dispatch = dispatch,
4e7a5dcd
SW		 2848 .get_authorizer = get_authorizer,
2849 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2850 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2851 .alloc_msg = alloc_msg,
81b024e7 2852 .fault = osd_reset,
f24e9980 2853};
Linux 6.x block layer and io_uring tree(s)