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libceph: protect osdc->osd_lru list with a spinlock
[deliverable/linux.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 22#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 23
5522ae0b
AE		 24static struct kmem_cache *ceph_osd_request_cache;
25
9e32789f 26static const struct ceph_connection_operations osd_con_ops;
f24e9980 27
f9d25199 28static void __send_queued(struct ceph_osd_client *osdc);
6f6c7006 29static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
a40c4f10
YS		 30static void __register_request(struct ceph_osd_client *osdc,
31 struct ceph_osd_request *req);
2cc6128a
ID		 32static void __unregister_request(struct ceph_osd_client *osdc,
33 struct ceph_osd_request *req);
a40c4f10
YS		 34static void __unregister_linger_request(struct ceph_osd_client *osdc,
35 struct ceph_osd_request *req);
2cc6128a 36static void __enqueue_request(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
8a703a38
IC		 120#define osd_req_op_data(oreq, whch, typ, fld) \
121({ \
122 struct ceph_osd_request *__oreq = (oreq); \
123 unsigned int __whch = (whch); \
124 BUG_ON(__whch >= __oreq->r_num_ops); \
125 &__oreq->r_ops[__whch].typ.fld; \
126})
863c7eb5 127
49719778
AE		 128static struct ceph_osd_data *
129osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
130{
131 BUG_ON(which >= osd_req->r_num_ops);
132
133 return &osd_req->r_ops[which].raw_data_in;
134}
135
a4ce40a9
AE		 136struct ceph_osd_data *
137osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 138 unsigned int which)
a4ce40a9 139{
863c7eb5 140 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 141}
142EXPORT_SYMBOL(osd_req_op_extent_osd_data);
143
49719778
AE		 144void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
145 unsigned int which, struct page **pages,
146 u64 length, u32 alignment,
147 bool pages_from_pool, bool own_pages)
148{
149 struct ceph_osd_data *osd_data;
150
151 osd_data = osd_req_op_raw_data_in(osd_req, which);
152 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
153 pages_from_pool, own_pages);
154}
155EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
156
a4ce40a9 157void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 158 unsigned int which, struct page **pages,
159 u64 length, u32 alignment,
a4ce40a9
AE		 160 bool pages_from_pool, bool own_pages)
161{
162 struct ceph_osd_data *osd_data;
163
863c7eb5 164 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 165 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
166 pages_from_pool, own_pages);
a4ce40a9
AE		 167}
168EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
169
170void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 171 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 172{
173 struct ceph_osd_data *osd_data;
174
863c7eb5 175 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 176 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 177}
178EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
179
180#ifdef CONFIG_BLOCK
181void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 182 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 183{
184 struct ceph_osd_data *osd_data;
863c7eb5
AE		 185
186 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 187 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 188}
189EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
190#endif /* CONFIG_BLOCK */
191
192static void osd_req_op_cls_request_info_pagelist(
193 struct ceph_osd_request *osd_req,
194 unsigned int which, struct ceph_pagelist *pagelist)
195{
196 struct ceph_osd_data *osd_data;
197
863c7eb5 198 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 199 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 200}
201
04017e29
AE		 202void osd_req_op_cls_request_data_pagelist(
203 struct ceph_osd_request *osd_req,
204 unsigned int which, struct ceph_pagelist *pagelist)
205{
206 struct ceph_osd_data *osd_data;
207
863c7eb5 208 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29 209 ceph_osd_data_pagelist_init(osd_data, pagelist);
bb873b53
ID		 210 osd_req->r_ops[which].cls.indata_len += pagelist->length;
211 osd_req->r_ops[which].indata_len += pagelist->length;
04017e29
AE		 212}
213EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
214
6c57b554
AE		 215void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
216 unsigned int which, struct page **pages, u64 length,
217 u32 alignment, bool pages_from_pool, bool own_pages)
218{
219 struct ceph_osd_data *osd_data;
220
221 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
222 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
223 pages_from_pool, own_pages);
bb873b53
ID		 224 osd_req->r_ops[which].cls.indata_len += length;
225 osd_req->r_ops[which].indata_len += length;
6c57b554
AE		 226}
227EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
228
a4ce40a9
AE		 229void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
230 unsigned int which, struct page **pages, u64 length,
231 u32 alignment, bool pages_from_pool, bool own_pages)
232{
233 struct ceph_osd_data *osd_data;
234
863c7eb5 235 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 236 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
237 pages_from_pool, own_pages);
a4ce40a9
AE		 238}
239EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
240
23c08a9c
AE		 241static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
242{
243 switch (osd_data->type) {
244 case CEPH_OSD_DATA_TYPE_NONE:
245 return 0;
246 case CEPH_OSD_DATA_TYPE_PAGES:
247 return osd_data->length;
248 case CEPH_OSD_DATA_TYPE_PAGELIST:
249 return (u64)osd_data->pagelist->length;
250#ifdef CONFIG_BLOCK
251 case CEPH_OSD_DATA_TYPE_BIO:
252 return (u64)osd_data->bio_length;
253#endif /* CONFIG_BLOCK */
254 default:
255 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
256 return 0;
257 }
258}
259
c54d47bf
AE		 260static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
261{
5476492f 262 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 263 int num_pages;
264
265 num_pages = calc_pages_for((u64)osd_data->alignment,
266 (u64)osd_data->length);
267 ceph_release_page_vector(osd_data->pages, num_pages);
268 }
5476492f
AE		 269 ceph_osd_data_init(osd_data);
270}
271
272static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
273 unsigned int which)
274{
275 struct ceph_osd_req_op *op;
276
277 BUG_ON(which >= osd_req->r_num_ops);
278 op = &osd_req->r_ops[which];
279
280 switch (op->op) {
281 case CEPH_OSD_OP_READ:
282 case CEPH_OSD_OP_WRITE:
e30b7577 283 case CEPH_OSD_OP_WRITEFULL:
5476492f
AE		 284 ceph_osd_data_release(&op->extent.osd_data);
285 break;
286 case CEPH_OSD_OP_CALL:
287 ceph_osd_data_release(&op->cls.request_info);
04017e29 288 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 289 ceph_osd_data_release(&op->cls.response_data);
290 break;
d74b50be
YZ		 291 case CEPH_OSD_OP_SETXATTR:
292 case CEPH_OSD_OP_CMPXATTR:
293 ceph_osd_data_release(&op->xattr.osd_data);
294 break;
66ba609f
YZ		 295 case CEPH_OSD_OP_STAT:
296 ceph_osd_data_release(&op->raw_data_in);
297 break;
5476492f
AE		 298 default:
299 break;
300 }
c54d47bf
AE		 301}
302
63244fa1
ID		 303/*
304 * Assumes @t is zero-initialized.
305 */
306static void target_init(struct ceph_osd_request_target *t)
307{
308 ceph_oid_init(&t->base_oid);
309 ceph_oloc_init(&t->base_oloc);
310 ceph_oid_init(&t->target_oid);
311 ceph_oloc_init(&t->target_oloc);
312
313 ceph_osds_init(&t->acting);
314 ceph_osds_init(&t->up);
315 t->size = -1;
316 t->min_size = -1;
317
318 t->osd = CEPH_HOMELESS_OSD;
319}
320
321static void target_destroy(struct ceph_osd_request_target *t)
322{
323 ceph_oid_destroy(&t->base_oid);
324 ceph_oid_destroy(&t->target_oid);
325}
326
f24e9980
SW		 327/*
328 * requests
329 */
9e94af20 330static void ceph_osdc_release_request(struct kref *kref)
f24e9980 331{
9e94af20
ID		 332 struct ceph_osd_request *req = container_of(kref,
333 struct ceph_osd_request, r_kref);
5476492f 334 unsigned int which;
415e49a9 335
9e94af20
ID		 336 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
337 req->r_request, req->r_reply);
6562d661
ID		 338 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
339 WARN_ON(!list_empty(&req->r_req_lru_item));
340 WARN_ON(!list_empty(&req->r_osd_item));
341 WARN_ON(!list_empty(&req->r_linger_item));
342 WARN_ON(!list_empty(&req->r_linger_osd_item));
343 WARN_ON(req->r_osd);
9e94af20 344
415e49a9
SW		 345 if (req->r_request)
346 ceph_msg_put(req->r_request);
ace6d3a9 347 if (req->r_reply) {
8921d114 348 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 349 ceph_msg_put(req->r_reply);
ace6d3a9 350 }
0fff87ec 351
5476492f
AE		 352 for (which = 0; which < req->r_num_ops; which++)
353 osd_req_op_data_release(req, which);
0fff87ec 354
a66dd383 355 target_destroy(&req->r_t);
415e49a9 356 ceph_put_snap_context(req->r_snapc);
d30291b9 357
415e49a9
SW		 358 if (req->r_mempool)
359 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 360 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 361 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 362 else
363 kfree(req);
f24e9980 364}
9e94af20
ID		 365
366void ceph_osdc_get_request(struct ceph_osd_request *req)
367{
368 dout("%s %p (was %d)\n", __func__, req,
369 atomic_read(&req->r_kref.refcount));
370 kref_get(&req->r_kref);
371}
372EXPORT_SYMBOL(ceph_osdc_get_request);
373
374void ceph_osdc_put_request(struct ceph_osd_request *req)
375{
3ed97d63
ID		 376 if (req) {
377 dout("%s %p (was %d)\n", __func__, req,
378 atomic_read(&req->r_kref.refcount));
379 kref_put(&req->r_kref, ceph_osdc_release_request);
380 }
9e94af20
ID		 381}
382EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 383
3499e8a5 384struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 385 struct ceph_snap_context *snapc,
1b83bef2 386 unsigned int num_ops,
3499e8a5 387 bool use_mempool,
54a54007 388 gfp_t gfp_flags)
f24e9980
SW		 389{
390 struct ceph_osd_request *req;
1b83bef2 391
f24e9980 392 if (use_mempool) {
3f1af42a 393 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 394 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 395 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
396 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 397 } else {
3f1af42a
ID		 398 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
399 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
400 gfp_flags);
f24e9980 401 }
3f1af42a 402 if (unlikely(!req))
a79832f2 403 return NULL;
f24e9980 404
3f1af42a
ID		 405 /* req only, each op is zeroed in _osd_req_op_init() */
406 memset(req, 0, sizeof(*req));
407
f24e9980
SW		 408 req->r_osdc = osdc;
409 req->r_mempool = use_mempool;
79528734 410 req->r_num_ops = num_ops;
84127282
ID		 411 req->r_snapid = CEPH_NOSNAP;
412 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 413
415e49a9 414 kref_init(&req->r_kref);
f24e9980
SW		 415 init_completion(&req->r_completion);
416 init_completion(&req->r_safe_completion);
a978fa20 417 RB_CLEAR_NODE(&req->r_node);
f24e9980 418 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 419 INIT_LIST_HEAD(&req->r_linger_item);
1d0326b1 420 INIT_LIST_HEAD(&req->r_linger_osd_item);
935b639a 421 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 422 INIT_LIST_HEAD(&req->r_osd_item);
423
a66dd383 424 target_init(&req->r_t);
22116525 425
13d1ad16
ID		 426 dout("%s req %p\n", __func__, req);
427 return req;
428}
429EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 430
13d1ad16
ID		 431int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
432{
433 struct ceph_osd_client *osdc = req->r_osdc;
434 struct ceph_msg *msg;
435 int msg_size;
c16e7869 436
d30291b9
ID		 437 WARN_ON(ceph_oid_empty(&req->r_base_oid));
438
13d1ad16 439 /* create request message */
ae458f5a
ID		 440 msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
441 msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
442 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
443 msg_size += 1 + 8 + 4 + 4; /* pgid */
13d1ad16
ID		 444 msg_size += 4 + req->r_base_oid.name_len; /* oid */
445 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 446 msg_size += 8; /* snapid */
447 msg_size += 8; /* snap_seq */
13d1ad16 448 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
ae458f5a
ID		 449 msg_size += 4; /* retry_attempt */
450
13d1ad16 451 if (req->r_mempool)
8f3bc053 452 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 453 else
13d1ad16
ID		 454 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
455 if (!msg)
456 return -ENOMEM;
68b4476b 457
f24e9980 458 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 459 req->r_request = msg;
3499e8a5 460
13d1ad16
ID		 461 /* create reply message */
462 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 463 msg_size += req->r_base_oid.name_len;
464 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 465
466 if (req->r_mempool)
467 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
468 else
469 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
470 if (!msg)
471 return -ENOMEM;
472
473 req->r_reply = msg;
474
475 return 0;
3499e8a5 476}
13d1ad16 477EXPORT_SYMBOL(ceph_osdc_alloc_messages);
3499e8a5 478
a8dd0a37 479static bool osd_req_opcode_valid(u16 opcode)
68b4476b 480{
a8dd0a37 481 switch (opcode) {
70b5bfa3
ID		 482#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
483__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
484#undef GENERATE_CASE
a8dd0a37
AE		 485 default:
486 return false;
487 }
488}
489
33803f33
AE		 490/*
491 * This is an osd op init function for opcodes that have no data or
492 * other information associated with them. It also serves as a
493 * common init routine for all the other init functions, below.
494 */
c99d2d4a 495static struct ceph_osd_req_op *
49719778 496_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 497 u16 opcode, u32 flags)
33803f33 498{
c99d2d4a
AE		 499 struct ceph_osd_req_op *op;
500
501 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 502 BUG_ON(!osd_req_opcode_valid(opcode));
503
c99d2d4a 504 op = &osd_req->r_ops[which];
33803f33 505 memset(op, 0, sizeof (*op));
33803f33 506 op->op = opcode;
144cba14 507 op->flags = flags;
c99d2d4a
AE		 508
509 return op;
33803f33
AE		 510}
511
49719778 512void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 513 unsigned int which, u16 opcode, u32 flags)
49719778 514{
144cba14 515 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 516}
517EXPORT_SYMBOL(osd_req_op_init);
518
c99d2d4a
AE		 519void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
520 unsigned int which, u16 opcode,
33803f33
AE		 521 u64 offset, u64 length,
522 u64 truncate_size, u32 truncate_seq)
523{
144cba14
YZ		 524 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
525 opcode, 0);
33803f33
AE		 526 size_t payload_len = 0;
527
ad7a60de 528 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 529 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
530 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 531
33803f33
AE		 532 op->extent.offset = offset;
533 op->extent.length = length;
534 op->extent.truncate_size = truncate_size;
535 op->extent.truncate_seq = truncate_seq;
e30b7577 536 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 537 payload_len += length;
538
de2aa102 539 op->indata_len = payload_len;
33803f33
AE		 540}
541EXPORT_SYMBOL(osd_req_op_extent_init);
542
c99d2d4a
AE		 543void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
544 unsigned int which, u64 length)
e5975c7c 545{
c99d2d4a
AE		 546 struct ceph_osd_req_op *op;
547 u64 previous;
548
549 BUG_ON(which >= osd_req->r_num_ops);
550 op = &osd_req->r_ops[which];
551 previous = op->extent.length;
e5975c7c
AE		 552
553 if (length == previous)
554 return; /* Nothing to do */
555 BUG_ON(length > previous);
556
557 op->extent.length = length;
de2aa102 558 op->indata_len -= previous - length;
e5975c7c
AE		 559}
560EXPORT_SYMBOL(osd_req_op_extent_update);
561
2c63f49a
YZ		 562void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
563 unsigned int which, u64 offset_inc)
564{
565 struct ceph_osd_req_op *op, *prev_op;
566
567 BUG_ON(which + 1 >= osd_req->r_num_ops);
568
569 prev_op = &osd_req->r_ops[which];
570 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
571 /* dup previous one */
572 op->indata_len = prev_op->indata_len;
573 op->outdata_len = prev_op->outdata_len;
574 op->extent = prev_op->extent;
575 /* adjust offset */
576 op->extent.offset += offset_inc;
577 op->extent.length -= offset_inc;
578
579 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
580 op->indata_len -= offset_inc;
581}
582EXPORT_SYMBOL(osd_req_op_extent_dup_last);
583
c99d2d4a 584void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 585 u16 opcode, const char *class, const char *method)
33803f33 586{
144cba14
YZ		 587 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
588 opcode, 0);
5f562df5 589 struct ceph_pagelist *pagelist;
33803f33
AE		 590 size_t payload_len = 0;
591 size_t size;
592
593 BUG_ON(opcode != CEPH_OSD_OP_CALL);
594
5f562df5
AE		 595 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
596 BUG_ON(!pagelist);
597 ceph_pagelist_init(pagelist);
598
33803f33
AE		 599 op->cls.class_name = class;
600 size = strlen(class);
601 BUG_ON(size > (size_t) U8_MAX);
602 op->cls.class_len = size;
5f562df5 603 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 604 payload_len += size;
605
606 op->cls.method_name = method;
607 size = strlen(method);
608 BUG_ON(size > (size_t) U8_MAX);
609 op->cls.method_len = size;
5f562df5 610 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 611 payload_len += size;
612
a4ce40a9 613 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 614
de2aa102 615 op->indata_len = payload_len;
33803f33
AE		 616}
617EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 618
d74b50be
YZ		 619int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
620 u16 opcode, const char *name, const void *value,
621 size_t size, u8 cmp_op, u8 cmp_mode)
622{
144cba14
YZ		 623 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
624 opcode, 0);
d74b50be
YZ		 625 struct ceph_pagelist *pagelist;
626 size_t payload_len;
627
628 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
629
630 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
631 if (!pagelist)
632 return -ENOMEM;
633
634 ceph_pagelist_init(pagelist);
635
636 payload_len = strlen(name);
637 op->xattr.name_len = payload_len;
638 ceph_pagelist_append(pagelist, name, payload_len);
639
640 op->xattr.value_len = size;
641 ceph_pagelist_append(pagelist, value, size);
642 payload_len += size;
643
644 op->xattr.cmp_op = cmp_op;
645 op->xattr.cmp_mode = cmp_mode;
646
647 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 648 op->indata_len = payload_len;
d74b50be
YZ		 649 return 0;
650}
651EXPORT_SYMBOL(osd_req_op_xattr_init);
652
c99d2d4a
AE		 653void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
654 unsigned int which, u16 opcode,
33803f33
AE		 655 u64 cookie, u64 version, int flag)
656{
144cba14
YZ		 657 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
658 opcode, 0);
33803f33 659
c99d2d4a 660 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 661
662 op->watch.cookie = cookie;
9ef1ee5a 663 op->watch.ver = version;
33803f33 664 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 665 op->watch.flag = (u8)1;
33803f33
AE		 666}
667EXPORT_SYMBOL(osd_req_op_watch_init);
668
c647b8a8
ID		 669void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
670 unsigned int which,
671 u64 expected_object_size,
672 u64 expected_write_size)
673{
674 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 675 CEPH_OSD_OP_SETALLOCHINT,
676 0);
c647b8a8
ID		 677
678 op->alloc_hint.expected_object_size = expected_object_size;
679 op->alloc_hint.expected_write_size = expected_write_size;
680
681 /*
682 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
683 * not worth a feature bit. Set FAILOK per-op flag to make
684 * sure older osds don't trip over an unsupported opcode.
685 */
686 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
687}
688EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
689
90af3602 690static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 691 struct ceph_osd_data *osd_data)
692{
693 u64 length = ceph_osd_data_length(osd_data);
694
695 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
696 BUG_ON(length > (u64) SIZE_MAX);
697 if (length)
90af3602 698 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 699 length, osd_data->alignment);
700 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
701 BUG_ON(!length);
90af3602 702 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 703#ifdef CONFIG_BLOCK
704 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 705 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 706#endif
707 } else {
708 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
709 }
710}
711
bb873b53
ID		 712static u32 osd_req_encode_op(struct ceph_osd_op *dst,
713 const struct ceph_osd_req_op *src)
a8dd0a37 714{
a8dd0a37
AE		 715 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
716 pr_err("unrecognized osd opcode %d\n", src->op);
717
718 return 0;
719 }
720
721 switch (src->op) {
722 case CEPH_OSD_OP_STAT:
723 break;
724 case CEPH_OSD_OP_READ:
725 case CEPH_OSD_OP_WRITE:
e30b7577 726 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 727 case CEPH_OSD_OP_ZERO:
ad7a60de 728 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37
AE		 729 dst->extent.offset = cpu_to_le64(src->extent.offset);
730 dst->extent.length = cpu_to_le64(src->extent.length);
731 dst->extent.truncate_size =
732 cpu_to_le64(src->extent.truncate_size);
733 dst->extent.truncate_seq =
734 cpu_to_le32(src->extent.truncate_seq);
735 break;
736 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 737 dst->cls.class_len = src->cls.class_len;
738 dst->cls.method_len = src->cls.method_len;
bb873b53 739 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
a8dd0a37
AE		 740 break;
741 case CEPH_OSD_OP_STARTSYNC:
742 break;
743 case CEPH_OSD_OP_NOTIFY_ACK:
744 case CEPH_OSD_OP_WATCH:
745 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
746 dst->watch.ver = cpu_to_le64(src->watch.ver);
747 dst->watch.flag = src->watch.flag;
748 break;
c647b8a8
ID		 749 case CEPH_OSD_OP_SETALLOCHINT:
750 dst->alloc_hint.expected_object_size =
751 cpu_to_le64(src->alloc_hint.expected_object_size);
752 dst->alloc_hint.expected_write_size =
753 cpu_to_le64(src->alloc_hint.expected_write_size);
754 break;
d74b50be
YZ		 755 case CEPH_OSD_OP_SETXATTR:
756 case CEPH_OSD_OP_CMPXATTR:
757 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
758 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
759 dst->xattr.cmp_op = src->xattr.cmp_op;
760 dst->xattr.cmp_mode = src->xattr.cmp_mode;
d74b50be 761 break;
864e9197
YZ		 762 case CEPH_OSD_OP_CREATE:
763 case CEPH_OSD_OP_DELETE:
764 break;
a8dd0a37 765 default:
4c46459c 766 pr_err("unsupported osd opcode %s\n",
8f63ca2d 767 ceph_osd_op_name(src->op));
4c46459c 768 WARN_ON(1);
a8dd0a37
AE		 769
770 return 0;
68b4476b 771 }
7b25bf5f 772
a8dd0a37 773 dst->op = cpu_to_le16(src->op);
7b25bf5f 774 dst->flags = cpu_to_le32(src->flags);
de2aa102 775 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 776
bb873b53 777 return src->indata_len;
68b4476b
YS		 778}
779
3499e8a5
YS		 780/*
781 * build new request AND message, calculate layout, and adjust file
782 * extent as needed.
783 *
784 * if the file was recently truncated, we include information about its
785 * old and new size so that the object can be updated appropriately. (we
786 * avoid synchronously deleting truncated objects because it's slow.)
787 *
788 * if @do_sync, include a 'startsync' command so that the osd will flush
789 * data quickly.
790 */
791struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
792 struct ceph_file_layout *layout,
793 struct ceph_vino vino,
715e4cd4
YZ		 794 u64 off, u64 *plen,
795 unsigned int which, int num_ops,
3499e8a5
YS		 796 int opcode, int flags,
797 struct ceph_snap_context *snapc,
3499e8a5
YS		 798 u32 truncate_seq,
799 u64 truncate_size,
153e5167 800 bool use_mempool)
3499e8a5 801{
68b4476b 802 struct ceph_osd_request *req;
75d1c941
AE		 803 u64 objnum = 0;
804 u64 objoff = 0;
805 u64 objlen = 0;
6816282d 806 int r;
68b4476b 807
ad7a60de 808 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 809 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
810 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 811
acead002 812 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 813 GFP_NOFS);
13d1ad16
ID		 814 if (!req) {
815 r = -ENOMEM;
816 goto fail;
817 }
79528734 818
3499e8a5 819 /* calculate max write size */
a19dadfb 820 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 821 if (r)
822 goto fail;
a19dadfb 823
864e9197 824 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 825 osd_req_op_init(req, which, opcode, 0);
864e9197
YZ		 826 } else {
827 u32 object_size = le32_to_cpu(layout->fl_object_size);
828 u32 object_base = off - objoff;
829 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
830 if (truncate_size <= object_base) {
831 truncate_size = 0;
832 } else {
833 truncate_size -= object_base;
834 if (truncate_size > object_size)
835 truncate_size = object_size;
836 }
ccca4e37 837 }
715e4cd4 838 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 839 truncate_size, truncate_seq);
840 }
d18d1e28 841
bb873b53 842 req->r_flags = flags;
3c972c95 843 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
d30291b9 844 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
dbe0fc41 845
bb873b53
ID		 846 req->r_snapid = vino.snap;
847 if (flags & CEPH_OSD_FLAG_WRITE)
848 req->r_data_offset = off;
849
13d1ad16
ID		 850 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
851 if (r)
852 goto fail;
853
f24e9980 854 return req;
13d1ad16
ID		 855
856fail:
857 ceph_osdc_put_request(req);
858 return ERR_PTR(r);
f24e9980 859}
3d14c5d2 860EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 861
862/*
863 * We keep osd requests in an rbtree, sorted by ->r_tid.
864 */
fcd00b68 865DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
f24e9980 866
0247a0cf
ID		 867static bool osd_homeless(struct ceph_osd *osd)
868{
869 return osd->o_osd == CEPH_HOMELESS_OSD;
870}
871
f24e9980
SW		 872static struct ceph_osd_request *
873__lookup_request_ge(struct ceph_osd_client *osdc,
874 u64 tid)
875{
876 struct ceph_osd_request *req;
877 struct rb_node *n = osdc->requests.rb_node;
878
879 while (n) {
880 req = rb_entry(n, struct ceph_osd_request, r_node);
881 if (tid < req->r_tid) {
882 if (!n->rb_left)
883 return req;
884 n = n->rb_left;
885 } else if (tid > req->r_tid) {
886 n = n->rb_right;
887 } else {
888 return req;
889 }
890 }
891 return NULL;
892}
893
2cc6128a
ID		 894static void __kick_linger_request(struct ceph_osd_request *req)
895{
896 struct ceph_osd_client *osdc = req->r_osdc;
897 struct ceph_osd *osd = req->r_osd;
898
899 /*
900 * Linger requests need to be resent with a new tid to avoid
901 * the dup op detection logic on the OSDs. Achieve this with
902 * a re-register dance instead of open-coding.
903 */
904 ceph_osdc_get_request(req);
905 if (!list_empty(&req->r_linger_item))
906 __unregister_linger_request(osdc, req);
907 else
908 __unregister_request(osdc, req);
909 __register_request(osdc, req);
910 ceph_osdc_put_request(req);
911
912 /*
913 * Unless request has been registered as both normal and
914 * lingering, __unregister{,_linger}_request clears r_osd.
915 * However, here we need to preserve r_osd to make sure we
916 * requeue on the same OSD.
917 */
918 WARN_ON(req->r_osd || !osd);
919 req->r_osd = osd;
920
921 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
922 __enqueue_request(req);
923}
924
6f6c7006
SW		 925/*
926 * Resubmit requests pending on the given osd.
927 */
928static void __kick_osd_requests(struct ceph_osd_client *osdc,
929 struct ceph_osd *osd)
930{
a40c4f10 931 struct ceph_osd_request *req, *nreq;
e02493c0 932 LIST_HEAD(resend);
2cc6128a 933 LIST_HEAD(resend_linger);
6f6c7006
SW		 934 int err;
935
2cc6128a 936 dout("%s osd%d\n", __func__, osd->o_osd);
6f6c7006 937 err = __reset_osd(osdc, osd);
685a7555 938 if (err)
6f6c7006 939 return;
2cc6128a 940
e02493c0
AE		 941 /*
942 * Build up a list of requests to resend by traversing the
943 * osd's list of requests. Requests for a given object are
944 * sent in tid order, and that is also the order they're
945 * kept on this list. Therefore all requests that are in
946 * flight will be found first, followed by all requests that
947 * have not yet been sent. And to resend requests while
948 * preserving this order we will want to put any sent
949 * requests back on the front of the osd client's unsent
950 * list.
951 *
952 * So we build a separate ordered list of already-sent
953 * requests for the affected osd and splice it onto the
954 * front of the osd client's unsent list. Once we've seen a
955 * request that has not yet been sent we're done. Those
956 * requests are already sitting right where they belong.
957 */
6f6c7006 958 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 959 if (!req->r_sent)
960 break;
2cc6128a
ID		 961
962 if (!req->r_linger) {
963 dout("%s requeueing %p tid %llu\n", __func__, req,
964 req->r_tid);
965 list_move_tail(&req->r_req_lru_item, &resend);
a40c4f10 966 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2cc6128a
ID		 967 } else {
968 list_move_tail(&req->r_req_lru_item, &resend_linger);
969 }
a40c4f10 970 }
e02493c0 971 list_splice(&resend, &osdc->req_unsent);
a40c4f10 972
e02493c0 973 /*
2cc6128a
ID		 974 * Both registered and not yet registered linger requests are
975 * enqueued with a new tid on the same OSD. We add/move them
976 * to req_unsent/o_requests at the end to keep things in tid
977 * order.
e02493c0 978 */
a40c4f10 979 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1d0326b1 980 r_linger_osd_item) {
2cc6128a
ID		 981 WARN_ON(!list_empty(&req->r_req_lru_item));
982 __kick_linger_request(req);
6f6c7006 983 }
2cc6128a
ID		 984
985 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
986 __kick_linger_request(req);
6f6c7006
SW		 987}
988
f24e9980 989/*
81b024e7 990 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 991 */
992static void osd_reset(struct ceph_connection *con)
993{
994 struct ceph_osd *osd = con->private;
995 struct ceph_osd_client *osdc;
996
997 if (!osd)
998 return;
999 dout("osd_reset osd%d\n", osd->o_osd);
1000 osdc = osd->o_osdc;
f24e9980 1001 down_read(&osdc->map_sem);
83aff95e
SW		 1002 mutex_lock(&osdc->request_mutex);
1003 __kick_osd_requests(osdc, osd);
f9d25199 1004 __send_queued(osdc);
83aff95e 1005 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1006 up_read(&osdc->map_sem);
1007}
1008
0247a0cf
ID		 1009/*
1010 * Assumes @osd is zero-initialized.
1011 */
1012static void osd_init(struct ceph_osd *osd)
1013{
1014 atomic_set(&osd->o_ref, 1);
1015 RB_CLEAR_NODE(&osd->o_node);
1016 INIT_LIST_HEAD(&osd->o_requests);
1017 INIT_LIST_HEAD(&osd->o_linger_requests);
1018 INIT_LIST_HEAD(&osd->o_osd_lru);
1019 INIT_LIST_HEAD(&osd->o_keepalive_item);
1020 osd->o_incarnation = 1;
1021}
1022
1023static void osd_cleanup(struct ceph_osd *osd)
1024{
1025 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1026 WARN_ON(!list_empty(&osd->o_requests));
1027 WARN_ON(!list_empty(&osd->o_linger_requests));
1028 WARN_ON(!list_empty(&osd->o_osd_lru));
1029 WARN_ON(!list_empty(&osd->o_keepalive_item));
1030
1031 if (osd->o_auth.authorizer) {
1032 WARN_ON(osd_homeless(osd));
1033 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1034 }
1035}
1036
f24e9980
SW		 1037/*
1038 * Track open sessions with osds.
1039 */
e10006f8 1040static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1041{
1042 struct ceph_osd *osd;
1043
0247a0cf
ID		 1044 WARN_ON(onum == CEPH_HOMELESS_OSD);
1045
7a28f59b 1046 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
0247a0cf 1047 osd_init(osd);
f24e9980 1048 osd->o_osdc = osdc;
e10006f8 1049 osd->o_osd = onum;
f24e9980 1050
b7a9e5dd 1051 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1052
f24e9980
SW		 1053 return osd;
1054}
1055
1056static struct ceph_osd *get_osd(struct ceph_osd *osd)
1057{
1058 if (atomic_inc_not_zero(&osd->o_ref)) {
1059 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1060 atomic_read(&osd->o_ref));
1061 return osd;
1062 } else {
1063 dout("get_osd %p FAIL\n", osd);
1064 return NULL;
1065 }
1066}
1067
1068static void put_osd(struct ceph_osd *osd)
1069{
1070 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1071 atomic_read(&osd->o_ref) - 1);
b28ec2f3 1072 if (atomic_dec_and_test(&osd->o_ref)) {
0247a0cf 1073 osd_cleanup(osd);
f24e9980 1074 kfree(osd);
79494d1b 1075 }
f24e9980
SW		 1076}
1077
fcd00b68
ID		 1078DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1079
f24e9980
SW		 1080/*
1081 * remove an osd from our map
1082 */
f5a2041b 1083static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1084{
7eb71e03 1085 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
cc9f1f51
ID		 1086 WARN_ON(!list_empty(&osd->o_requests));
1087 WARN_ON(!list_empty(&osd->o_linger_requests));
7c6e6fc5 1088
f5a2041b 1089 list_del_init(&osd->o_osd_lru);
fcd00b68 1090 erase_osd(&osdc->osds, osd);
7eb71e03
ID		 1091}
1092
1093static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1094{
1095 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1096
1097 if (!RB_EMPTY_NODE(&osd->o_node)) {
1098 ceph_con_close(&osd->o_con);
1099 __remove_osd(osdc, osd);
1100 put_osd(osd);
1101 }
f24e9980
SW		 1102}
1103
9dd2845c 1104static void __move_osd_to_lru(struct ceph_osd *osd)
f5a2041b 1105{
9dd2845c
ID		 1106 struct ceph_osd_client *osdc = osd->o_osdc;
1107
1108 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
f5a2041b 1109 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1110
9dd2845c 1111 spin_lock(&osdc->osd_lru_lock);
f5a2041b 1112 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
9dd2845c
ID		 1113 spin_unlock(&osdc->osd_lru_lock);
1114
a319bf56 1115 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1116}
1117
9dd2845c 1118static void maybe_move_osd_to_lru(struct ceph_osd *osd)
bbf37ec3 1119{
bbf37ec3
ID		 1120 if (list_empty(&osd->o_requests) &&
1121 list_empty(&osd->o_linger_requests))
9dd2845c 1122 __move_osd_to_lru(osd);
bbf37ec3
ID		 1123}
1124
f5a2041b
YS		 1125static void __remove_osd_from_lru(struct ceph_osd *osd)
1126{
9dd2845c
ID		 1127 struct ceph_osd_client *osdc = osd->o_osdc;
1128
1129 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1130
1131 spin_lock(&osdc->osd_lru_lock);
f5a2041b
YS		 1132 if (!list_empty(&osd->o_osd_lru))
1133 list_del_init(&osd->o_osd_lru);
9dd2845c 1134 spin_unlock(&osdc->osd_lru_lock);
f5a2041b
YS		 1135}
1136
f24e9980
SW		 1137/*
1138 * reset osd connect
1139 */
f5a2041b 1140static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1141{
c3acb181 1142 struct ceph_entity_addr *peer_addr;
f24e9980 1143
f5a2041b 1144 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1145 if (list_empty(&osd->o_requests) &&
1146 list_empty(&osd->o_linger_requests)) {
7eb71e03 1147 remove_osd(osdc, osd);
c3acb181
AE		 1148 return -ENODEV;
1149 }
1150
1151 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1152 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1153 !ceph_con_opened(&osd->o_con)) {
1154 struct ceph_osd_request *req;
1155
0b4af2e8
ID		 1156 dout("osd addr hasn't changed and connection never opened, "
1157 "letting msgr retry\n");
87b315a5
SW		 1158 /* touch each r_stamp for handle_timeout()'s benfit */
1159 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1160 req->r_stamp = jiffies;
c3acb181
AE		 1161
1162 return -EAGAIN;
f24e9980 1163 }
c3acb181
AE		 1164
1165 ceph_con_close(&osd->o_con);
1166 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1167 osd->o_incarnation++;
1168
1169 return 0;
f24e9980
SW		 1170}
1171
f24e9980
SW		 1172/*
1173 * Register request, assign tid. If this is the first request, set up
1174 * the timeout event.
1175 */
a40c4f10
YS		 1176static void __register_request(struct ceph_osd_client *osdc,
1177 struct ceph_osd_request *req)
f24e9980 1178{
f24e9980 1179 req->r_tid = ++osdc->last_tid;
6df058c0 1180 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1181 dout("__register_request %p tid %lld\n", req, req->r_tid);
fcd00b68 1182 insert_request(&osdc->requests, req);
f24e9980
SW		 1183 ceph_osdc_get_request(req);
1184 osdc->num_requests++;
a40c4f10
YS		 1185}
1186
f24e9980
SW		 1187/*
1188 * called under osdc->request_mutex
1189 */
1190static void __unregister_request(struct ceph_osd_client *osdc,
1191 struct ceph_osd_request *req)
1192{
35f9f8a0
SW		 1193 if (RB_EMPTY_NODE(&req->r_node)) {
1194 dout("__unregister_request %p tid %lld not registered\n",
1195 req, req->r_tid);
1196 return;
1197 }
1198
f24e9980 1199 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
fcd00b68 1200 erase_request(&osdc->requests, req);
f24e9980
SW		 1201 osdc->num_requests--;
1202
0ba6478d
SW		 1203 if (req->r_osd) {
1204 /* make sure the original request isn't in flight. */
6740a845 1205 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1206
1207 list_del_init(&req->r_osd_item);
9dd2845c 1208 maybe_move_osd_to_lru(req->r_osd);
4f23409e 1209 if (list_empty(&req->r_linger_osd_item))
a40c4f10 1210 req->r_osd = NULL;
0ba6478d 1211 }
f24e9980 1212
7d5f2481 1213 list_del_init(&req->r_req_lru_item);
f24e9980 1214 ceph_osdc_put_request(req);
f24e9980
SW		 1215}
1216
1217/*
1218 * Cancel a previously queued request message
1219 */
1220static void __cancel_request(struct ceph_osd_request *req)
1221{
6bc18876 1222 if (req->r_sent && req->r_osd) {
6740a845 1223 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1224 req->r_sent = 0;
1225 }
1226}
1227
a40c4f10
YS		 1228static void __register_linger_request(struct ceph_osd_client *osdc,
1229 struct ceph_osd_request *req)
1230{
af593064
ID		 1231 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1232 WARN_ON(!req->r_linger);
1233
96e4dac6 1234 ceph_osdc_get_request(req);
a40c4f10 1235 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89 1236 if (req->r_osd)
1d0326b1 1237 list_add_tail(&req->r_linger_osd_item,
6194ea89 1238 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1239}
1240
1241static void __unregister_linger_request(struct ceph_osd_client *osdc,
1242 struct ceph_osd_request *req)
1243{
af593064
ID		 1244 WARN_ON(!req->r_linger);
1245
1246 if (list_empty(&req->r_linger_item)) {
1247 dout("%s %p tid %llu not registered\n", __func__, req,
1248 req->r_tid);
1249 return;
1250 }
1251
1252 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
61c74035 1253 list_del_init(&req->r_linger_item);
af593064 1254
a40c4f10 1255 if (req->r_osd) {
1d0326b1 1256 list_del_init(&req->r_linger_osd_item);
9dd2845c 1257 maybe_move_osd_to_lru(req->r_osd);
fbdb9190
SW		 1258 if (list_empty(&req->r_osd_item))
1259 req->r_osd = NULL;
a40c4f10 1260 }
96e4dac6 1261 ceph_osdc_put_request(req);
a40c4f10
YS		 1262}
1263
a40c4f10
YS		 1264void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1265 struct ceph_osd_request *req)
1266{
1267 if (!req->r_linger) {
1268 dout("set_request_linger %p\n", req);
1269 req->r_linger = 1;
a40c4f10
YS		 1270 }
1271}
1272EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1273
63244fa1
ID		 1274static bool __pool_full(struct ceph_pg_pool_info *pi)
1275{
1276 return pi->flags & CEPH_POOL_FLAG_FULL;
1277}
1278
42c1b124
ID		 1279static bool have_pool_full(struct ceph_osd_client *osdc)
1280{
1281 struct rb_node *n;
1282
1283 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1284 struct ceph_pg_pool_info *pi =
1285 rb_entry(n, struct ceph_pg_pool_info, node);
1286
1287 if (__pool_full(pi))
1288 return true;
1289 }
1290
1291 return false;
1292}
1293
d29adb34
JD		 1294/*
1295 * Returns whether a request should be blocked from being sent
1296 * based on the current osdmap and osd_client settings.
1297 *
1298 * Caller should hold map_sem for read.
1299 */
63244fa1
ID		 1300static bool target_should_be_paused(struct ceph_osd_client *osdc,
1301 const struct ceph_osd_request_target *t,
1302 struct ceph_pg_pool_info *pi)
1303{
1304 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1305 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1306 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1307 __pool_full(pi);
1308
1309 WARN_ON(pi->id != t->base_oloc.pool);
1310 return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
1311 (t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
1312}
1313
63244fa1
ID		 1314enum calc_target_result {
1315 CALC_TARGET_NO_ACTION = 0,
1316 CALC_TARGET_NEED_RESEND,
1317 CALC_TARGET_POOL_DNE,
1318};
1319
1320static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1321 struct ceph_osd_request_target *t,
1322 u32 *last_force_resend,
1323 bool any_change)
1324{
1325 struct ceph_pg_pool_info *pi;
1326 struct ceph_pg pgid, last_pgid;
1327 struct ceph_osds up, acting;
1328 bool force_resend = false;
1329 bool need_check_tiering = false;
1330 bool need_resend = false;
1331 bool sort_bitwise = ceph_osdmap_flag(osdc->osdmap,
1332 CEPH_OSDMAP_SORTBITWISE);
1333 enum calc_target_result ct_res;
1334 int ret;
1335
1336 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1337 if (!pi) {
1338 t->osd = CEPH_HOMELESS_OSD;
1339 ct_res = CALC_TARGET_POOL_DNE;
1340 goto out;
1341 }
1342
1343 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1344 if (last_force_resend &&
1345 *last_force_resend < pi->last_force_request_resend) {
1346 *last_force_resend = pi->last_force_request_resend;
1347 force_resend = true;
1348 } else if (!last_force_resend) {
1349 force_resend = true;
1350 }
1351 }
1352 if (ceph_oid_empty(&t->target_oid) || force_resend) {
1353 ceph_oid_copy(&t->target_oid, &t->base_oid);
1354 need_check_tiering = true;
1355 }
1356 if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
1357 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1358 need_check_tiering = true;
1359 }
1360
1361 if (need_check_tiering &&
1362 (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1363 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1364 t->target_oloc.pool = pi->read_tier;
1365 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1366 t->target_oloc.pool = pi->write_tier;
1367 }
1368
1369 ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
1370 &t->target_oloc, &pgid);
1371 if (ret) {
1372 WARN_ON(ret != -ENOENT);
1373 t->osd = CEPH_HOMELESS_OSD;
1374 ct_res = CALC_TARGET_POOL_DNE;
1375 goto out;
1376 }
1377 last_pgid.pool = pgid.pool;
1378 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1379
1380 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
1381 if (any_change &&
1382 ceph_is_new_interval(&t->acting,
1383 &acting,
1384 &t->up,
1385 &up,
1386 t->size,
1387 pi->size,
1388 t->min_size,
1389 pi->min_size,
1390 t->pg_num,
1391 pi->pg_num,
1392 t->sort_bitwise,
1393 sort_bitwise,
1394 &last_pgid))
1395 force_resend = true;
1396
1397 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1398 t->paused = false;
1399 need_resend = true;
1400 }
1401
1402 if (ceph_pg_compare(&t->pgid, &pgid) ||
1403 ceph_osds_changed(&t->acting, &acting, any_change) ||
1404 force_resend) {
1405 t->pgid = pgid; /* struct */
1406 ceph_osds_copy(&t->acting, &acting);
1407 ceph_osds_copy(&t->up, &up);
1408 t->size = pi->size;
1409 t->min_size = pi->min_size;
1410 t->pg_num = pi->pg_num;
1411 t->pg_num_mask = pi->pg_num_mask;
1412 t->sort_bitwise = sort_bitwise;
1413
1414 t->osd = acting.primary;
1415 need_resend = true;
1416 }
1417
1418 ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION;
1419out:
1420 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1421 return ct_res;
1422}
1423
f671b581
ID		 1424static void __enqueue_request(struct ceph_osd_request *req)
1425{
1426 struct ceph_osd_client *osdc = req->r_osdc;
1427
1428 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1429 req->r_osd ? req->r_osd->o_osd : -1);
1430
1431 if (req->r_osd) {
1432 __remove_osd_from_lru(req->r_osd);
1433 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1434 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1435 } else {
1436 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1437 }
1438}
1439
f24e9980
SW		 1440/*
1441 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1442 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1443 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1444 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1445 *
1446 * Return 0 if unchanged, 1 if changed, or negative on error.
1447 *
1448 * Caller should hold map_sem for read and request_mutex.
1449 */
6f6c7006 1450static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1451 struct ceph_osd_request *req, int force_resend)
f24e9980 1452{
a66dd383 1453 enum calc_target_result ct_res;
f24e9980 1454 int err;
f24e9980 1455
6f6c7006 1456 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40 1457
a66dd383
ID		 1458 ct_res = calc_target(osdc, &req->r_t, NULL, force_resend);
1459 switch (ct_res) {
1460 case CALC_TARGET_POOL_DNE:
6f6c7006 1461 list_move(&req->r_req_lru_item, &osdc->req_notarget);
a66dd383
ID		 1462 return -EIO;
1463 case CALC_TARGET_NO_ACTION:
f24e9980 1464 return 0; /* no change */
a66dd383
ID		 1465 default:
1466 BUG_ON(ct_res != CALC_TARGET_NEED_RESEND);
1467 }
f24e9980 1468
5b191d99 1469 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
a66dd383 1470 req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, req->r_t.osd,
f24e9980
SW		 1471 req->r_osd ? req->r_osd->o_osd : -1);
1472
1473 if (req->r_osd) {
1474 __cancel_request(req);
1475 list_del_init(&req->r_osd_item);
a390de02 1476 list_del_init(&req->r_linger_osd_item);
f24e9980
SW		 1477 req->r_osd = NULL;
1478 }
1479
a66dd383
ID		 1480 req->r_osd = lookup_osd(&osdc->osds, req->r_t.osd);
1481 if (!req->r_osd && req->r_t.osd >= 0) {
c99eb1c7 1482 err = -ENOMEM;
a66dd383 1483 req->r_osd = create_osd(osdc, req->r_t.osd);
6f6c7006
SW		 1484 if (!req->r_osd) {
1485 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1486 goto out;
6f6c7006 1487 }
f24e9980 1488
6f3bfd45 1489 dout("map_request osd %p is osd%d\n", req->r_osd,
a66dd383 1490 req->r_osd->o_osd);
fcd00b68 1491 insert_osd(&osdc->osds, req->r_osd);
f24e9980 1492
b7a9e5dd 1493 ceph_con_open(&req->r_osd->o_con,
a66dd383
ID		 1494 CEPH_ENTITY_TYPE_OSD, req->r_osd->o_osd,
1495 &osdc->osdmap->osd_addr[req->r_osd->o_osd]);
f24e9980
SW		 1496 }
1497
f671b581 1498 __enqueue_request(req);
d85b7056 1499 err = 1; /* osd or pg changed */
f24e9980
SW		 1500
1501out:
f24e9980
SW		 1502 return err;
1503}
1504
bb873b53
ID		 1505static void setup_request_data(struct ceph_osd_request *req,
1506 struct ceph_msg *msg)
f24e9980 1507{
bb873b53
ID		 1508 u32 data_len = 0;
1509 int i;
1510
1511 if (!list_empty(&msg->data))
1512 return;
f24e9980 1513
bb873b53
ID		 1514 WARN_ON(msg->data_length);
1515 for (i = 0; i < req->r_num_ops; i++) {
1516 struct ceph_osd_req_op *op = &req->r_ops[i];
1517
1518 switch (op->op) {
1519 /* request */
1520 case CEPH_OSD_OP_WRITE:
1521 case CEPH_OSD_OP_WRITEFULL:
1522 WARN_ON(op->indata_len != op->extent.length);
1523 ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
1524 break;
1525 case CEPH_OSD_OP_SETXATTR:
1526 case CEPH_OSD_OP_CMPXATTR:
1527 WARN_ON(op->indata_len != op->xattr.name_len +
1528 op->xattr.value_len);
1529 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
1530 break;
1531
1532 /* reply */
1533 case CEPH_OSD_OP_STAT:
1534 ceph_osdc_msg_data_add(req->r_reply,
1535 &op->raw_data_in);
1536 break;
1537 case CEPH_OSD_OP_READ:
1538 ceph_osdc_msg_data_add(req->r_reply,
1539 &op->extent.osd_data);
1540 break;
1541
1542 /* both */
1543 case CEPH_OSD_OP_CALL:
1544 WARN_ON(op->indata_len != op->cls.class_len +
1545 op->cls.method_len +
1546 op->cls.indata_len);
1547 ceph_osdc_msg_data_add(msg, &op->cls.request_info);
1548 /* optional, can be NONE */
1549 ceph_osdc_msg_data_add(msg, &op->cls.request_data);
1550 /* optional, can be NONE */
1551 ceph_osdc_msg_data_add(req->r_reply,
1552 &op->cls.response_data);
1553 break;
1554 }
1555
1556 data_len += op->indata_len;
1557 }
1b83bef2 1558
bb873b53
ID		 1559 WARN_ON(data_len != msg->data_length);
1560}
1561
1562static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
1563{
1564 void *p = msg->front.iov_base;
1565 void *const end = p + msg->front_alloc_len;
1566 u32 data_len = 0;
1567 int i;
1568
1569 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
1570 /* snapshots aren't writeable */
1571 WARN_ON(req->r_snapid != CEPH_NOSNAP);
1572 } else {
1573 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
1574 req->r_data_offset || req->r_snapc);
1575 }
1576
1577 setup_request_data(req, msg);
1578
1579 ceph_encode_32(&p, 1); /* client_inc, always 1 */
1580 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
1581 ceph_encode_32(&p, req->r_flags);
1582 ceph_encode_timespec(p, &req->r_mtime);
1583 p += sizeof(struct ceph_timespec);
1584 /* aka reassert_version */
1585 memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version));
1586 p += sizeof(req->r_replay_version);
1587
1588 /* oloc */
1589 ceph_encode_8(&p, 4);
1590 ceph_encode_8(&p, 4);
1591 ceph_encode_32(&p, 8 + 4 + 4);
1592 ceph_encode_64(&p, req->r_t.target_oloc.pool);
1593 ceph_encode_32(&p, -1); /* preferred */
1594 ceph_encode_32(&p, 0); /* key len */
1595
1596 /* pgid */
1597 ceph_encode_8(&p, 1);
a66dd383
ID		 1598 ceph_encode_64(&p, req->r_t.pgid.pool);
1599 ceph_encode_32(&p, req->r_t.pgid.seed);
bb873b53 1600 ceph_encode_32(&p, -1); /* preferred */
2169aea6 1601
bb873b53
ID		 1602 /* oid */
1603 ceph_encode_32(&p, req->r_t.target_oid.name_len);
1604 memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len);
1605 p += req->r_t.target_oid.name_len;
f24e9980 1606
bb873b53
ID		 1607 /* ops, can imply data */
1608 ceph_encode_16(&p, req->r_num_ops);
1609 for (i = 0; i < req->r_num_ops; i++) {
1610 data_len += osd_req_encode_op(p, &req->r_ops[i]);
1611 p += sizeof(struct ceph_osd_op);
1612 }
26be8808 1613
bb873b53
ID		 1614 ceph_encode_64(&p, req->r_snapid); /* snapid */
1615 if (req->r_snapc) {
1616 ceph_encode_64(&p, req->r_snapc->seq);
1617 ceph_encode_32(&p, req->r_snapc->num_snaps);
1618 for (i = 0; i < req->r_snapc->num_snaps; i++)
1619 ceph_encode_64(&p, req->r_snapc->snaps[i]);
1620 } else {
1621 ceph_encode_64(&p, 0); /* snap_seq */
1622 ceph_encode_32(&p, 0); /* snaps len */
1623 }
1624
1625 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
1626
1627 BUG_ON(p > end);
1628 msg->front.iov_len = p - msg->front.iov_base;
1629 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
1630 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
1631 msg->hdr.data_len = cpu_to_le32(data_len);
1632 /*
1633 * The header "data_off" is a hint to the receiver allowing it
1634 * to align received data into its buffers such that there's no
1635 * need to re-copy it before writing it to disk (direct I/O).
1636 */
1637 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
26be8808 1638
bb873b53
ID		 1639 dout("%s req %p oid %*pE oid_len %d front %zu data %u\n", __func__,
1640 req, req->r_t.target_oid.name_len, req->r_t.target_oid.name,
1641 req->r_t.target_oid.name_len, msg->front.iov_len, data_len);
1642}
1643
1644/*
1645 * @req has to be assigned a tid and registered.
1646 */
1647static void send_request(struct ceph_osd_request *req)
1648{
1649 struct ceph_osd *osd = req->r_osd;
1650
1651 WARN_ON(osd->o_osd != req->r_t.osd);
1652
1653 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
1654 if (req->r_attempts)
1655 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1656 else
1657 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
1658
1659 encode_request(req, req->r_request);
1660
1661 dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n",
1662 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
1663 req->r_t.osd, req->r_flags, req->r_attempts);
1664
1665 req->r_t.paused = false;
1666 req->r_stamp = jiffies;
1667 req->r_attempts++;
1668
1669 req->r_sent = osd->o_incarnation;
1670 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1671 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
f24e9980
SW		 1672}
1673
6f6c7006
SW		 1674/*
1675 * Send any requests in the queue (req_unsent).
1676 */
f9d25199 1677static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1678{
1679 struct ceph_osd_request *req, *tmp;
1680
f9d25199 1681 dout("__send_queued\n");
bb873b53
ID		 1682 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) {
1683 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1684 send_request(req);
1685 }
6f6c7006
SW		 1686}
1687
42c1b124
ID		 1688static void maybe_request_map(struct ceph_osd_client *osdc)
1689{
1690 bool continuous = false;
1691
1692 WARN_ON(!osdc->osdmap->epoch);
1693
1694 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1695 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
1696 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) {
1697 dout("%s osdc %p continuous\n", __func__, osdc);
1698 continuous = true;
1699 } else {
1700 dout("%s osdc %p onetime\n", __func__, osdc);
1701 }
1702
1703 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
1704 osdc->osdmap->epoch + 1, continuous))
1705 ceph_monc_renew_subs(&osdc->client->monc);
1706}
1707
0bbfdfe8
ID		 1708/*
1709 * Caller should hold map_sem for read and request_mutex.
1710 */
1711static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1712 struct ceph_osd_request *req,
1713 bool nofail)
1714{
1715 int rc;
1716
1717 __register_request(osdc, req);
1718 req->r_sent = 0;
1719 req->r_got_reply = 0;
1720 rc = __map_request(osdc, req, 0);
1721 if (rc < 0) {
1722 if (nofail) {
1723 dout("osdc_start_request failed map, "
1724 " will retry %lld\n", req->r_tid);
1725 rc = 0;
1726 } else {
1727 __unregister_request(osdc, req);
1728 }
1729 return rc;
1730 }
1731
1732 if (req->r_osd == NULL) {
1733 dout("send_request %p no up osds in pg\n", req);
1734 ceph_monc_request_next_osdmap(&osdc->client->monc);
1735 } else {
1736 __send_queued(osdc);
1737 }
1738
1739 return 0;
1740}
1741
fe5da05e
ID		 1742static void __complete_request(struct ceph_osd_request *req)
1743{
1744 if (req->r_callback)
1745 req->r_callback(req);
1746 else
1747 complete_all(&req->r_completion);
1748}
1749
f24e9980 1750/*
fbca9635
ID		 1751 * Timeout callback, called every N seconds. When 1 or more OSD
1752 * requests has been active for more than N seconds, we send a keepalive
1753 * (tag + timestamp) to its OSD to ensure any communications channel
1754 * reset is detected.
f24e9980
SW		 1755 */
1756static void handle_timeout(struct work_struct *work)
1757{
1758 struct ceph_osd_client *osdc =
1759 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 1760 struct ceph_options *opts = osdc->client->options;
83aff95e 1761 struct ceph_osd_request *req;
f24e9980 1762 struct ceph_osd *osd;
422d2cb8 1763 struct list_head slow_osds;
f24e9980
SW		 1764 dout("timeout\n");
1765 down_read(&osdc->map_sem);
1766
1767 ceph_monc_request_next_osdmap(&osdc->client->monc);
1768
1769 mutex_lock(&osdc->request_mutex);
f24e9980 1770
422d2cb8
YS		 1771 /*
1772 * ping osds that are a bit slow. this ensures that if there
1773 * is a break in the TCP connection we will notice, and reopen
1774 * a connection with that osd (from the fault callback).
1775 */
1776 INIT_LIST_HEAD(&slow_osds);
1777 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
a319bf56
ID		 1778 if (time_before(jiffies,
1779 req->r_stamp + opts->osd_keepalive_timeout))
422d2cb8
YS		 1780 break;
1781
1782 osd = req->r_osd;
1783 BUG_ON(!osd);
1784 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1785 req->r_tid, osd->o_osd);
422d2cb8
YS		 1786 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1787 }
1788 while (!list_empty(&slow_osds)) {
1789 osd = list_entry(slow_osds.next, struct ceph_osd,
1790 o_keepalive_item);
1791 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1792 ceph_con_keepalive(&osd->o_con);
1793 }
1794
f9d25199 1795 __send_queued(osdc);
f24e9980 1796 mutex_unlock(&osdc->request_mutex);
f24e9980 1797 up_read(&osdc->map_sem);
fbca9635
ID		 1798
1799 schedule_delayed_work(&osdc->timeout_work,
1800 osdc->client->options->osd_keepalive_timeout);
f24e9980
SW		 1801}
1802
f5a2041b
YS		 1803static void handle_osds_timeout(struct work_struct *work)
1804{
1805 struct ceph_osd_client *osdc =
1806 container_of(work, struct ceph_osd_client,
1807 osds_timeout_work.work);
a319bf56 1808 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 1809 struct ceph_osd *osd, *nosd;
f5a2041b 1810
42a2c09f 1811 dout("%s osdc %p\n", __func__, osdc);
f5a2041b 1812 down_read(&osdc->map_sem);
42a2c09f
ID		 1813 mutex_lock(&osdc->request_mutex);
1814
1815 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1816 if (time_before(jiffies, osd->lru_ttl))
1817 break;
1818
1819 remove_osd(osdc, osd);
1820 }
f5a2041b 1821
42a2c09f
ID		 1822 mutex_unlock(&osdc->request_mutex);
1823 up_read(&osdc->map_sem);
f5a2041b
YS		 1824 schedule_delayed_work(&osdc->osds_timeout_work,
1825 round_jiffies_relative(delay));
1826}
1827
205ee118
ID		 1828static int ceph_oloc_decode(void **p, void *end,
1829 struct ceph_object_locator *oloc)
1830{
1831 u8 struct_v, struct_cv;
1832 u32 len;
1833 void *struct_end;
1834 int ret = 0;
1835
1836 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1837 struct_v = ceph_decode_8(p);
1838 struct_cv = ceph_decode_8(p);
1839 if (struct_v < 3) {
1840 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1841 struct_v, struct_cv);
1842 goto e_inval;
1843 }
1844 if (struct_cv > 6) {
1845 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1846 struct_v, struct_cv);
1847 goto e_inval;
1848 }
1849 len = ceph_decode_32(p);
1850 ceph_decode_need(p, end, len, e_inval);
1851 struct_end = *p + len;
1852
1853 oloc->pool = ceph_decode_64(p);
1854 *p += 4; /* skip preferred */
1855
1856 len = ceph_decode_32(p);
1857 if (len > 0) {
1858 pr_warn("ceph_object_locator::key is set\n");
1859 goto e_inval;
1860 }
1861
1862 if (struct_v >= 5) {
1863 len = ceph_decode_32(p);
1864 if (len > 0) {
1865 pr_warn("ceph_object_locator::nspace is set\n");
1866 goto e_inval;
1867 }
1868 }
1869
1870 if (struct_v >= 6) {
1871 s64 hash = ceph_decode_64(p);
1872 if (hash != -1) {
1873 pr_warn("ceph_object_locator::hash is set\n");
1874 goto e_inval;
1875 }
1876 }
1877
1878 /* skip the rest */
1879 *p = struct_end;
1880out:
1881 return ret;
1882
1883e_inval:
1884 ret = -EINVAL;
1885 goto out;
1886}
1887
1888static int ceph_redirect_decode(void **p, void *end,
1889 struct ceph_request_redirect *redir)
1890{
1891 u8 struct_v, struct_cv;
1892 u32 len;
1893 void *struct_end;
1894 int ret;
1895
1896 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1897 struct_v = ceph_decode_8(p);
1898 struct_cv = ceph_decode_8(p);
1899 if (struct_cv > 1) {
1900 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1901 struct_v, struct_cv);
1902 goto e_inval;
1903 }
1904 len = ceph_decode_32(p);
1905 ceph_decode_need(p, end, len, e_inval);
1906 struct_end = *p + len;
1907
1908 ret = ceph_oloc_decode(p, end, &redir->oloc);
1909 if (ret)
1910 goto out;
1911
1912 len = ceph_decode_32(p);
1913 if (len > 0) {
1914 pr_warn("ceph_request_redirect::object_name is set\n");
1915 goto e_inval;
1916 }
1917
1918 len = ceph_decode_32(p);
1919 *p += len; /* skip osd_instructions */
1920
1921 /* skip the rest */
1922 *p = struct_end;
1923out:
1924 return ret;
1925
1926e_inval:
1927 ret = -EINVAL;
1928 goto out;
1929}
1930
fe5da05e
ID		 1931struct MOSDOpReply {
1932 struct ceph_pg pgid;
1933 u64 flags;
1934 int result;
1935 u32 epoch;
1936 int num_ops;
1937 u32 outdata_len[CEPH_OSD_MAX_OPS];
1938 s32 rval[CEPH_OSD_MAX_OPS];
1939 int retry_attempt;
1940 struct ceph_eversion replay_version;
1941 u64 user_version;
1942 struct ceph_request_redirect redirect;
1943};
25845472 1944
fe5da05e 1945static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
f24e9980 1946{
fe5da05e
ID		 1947 void *p = msg->front.iov_base;
1948 void *const end = p + msg->front.iov_len;
1949 u16 version = le16_to_cpu(msg->hdr.version);
1950 struct ceph_eversion bad_replay_version;
b0b31a8f 1951 u8 decode_redir;
fe5da05e
ID		 1952 u32 len;
1953 int ret;
1954 int i;
1b83bef2 1955
fe5da05e
ID		 1956 ceph_decode_32_safe(&p, end, len, e_inval);
1957 ceph_decode_need(&p, end, len, e_inval);
1958 p += len; /* skip oid */
1b83bef2 1959
fe5da05e
ID		 1960 ret = ceph_decode_pgid(&p, end, &m->pgid);
1961 if (ret)
1962 return ret;
1b83bef2 1963
fe5da05e
ID		 1964 ceph_decode_64_safe(&p, end, m->flags, e_inval);
1965 ceph_decode_32_safe(&p, end, m->result, e_inval);
1966 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
1967 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
1968 p += sizeof(bad_replay_version);
1969 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1b83bef2 1970
fe5da05e
ID		 1971 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
1972 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
1973 goto e_inval;
1b83bef2 1974
fe5da05e
ID		 1975 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
1976 e_inval);
1977 for (i = 0; i < m->num_ops; i++) {
1b83bef2 1978 struct ceph_osd_op *op = p;
1b83bef2 1979
fe5da05e 1980 m->outdata_len[i] = le32_to_cpu(op->payload_len);
1b83bef2
SW		 1981 p += sizeof(*op);
1982 }
1b83bef2 1983
fe5da05e
ID		 1984 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
1985 for (i = 0; i < m->num_ops; i++)
1986 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
f24e9980 1987
fe5da05e
ID		 1988 if (version >= 5) {
1989 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
1990 memcpy(&m->replay_version, p, sizeof(m->replay_version));
1991 p += sizeof(m->replay_version);
1992 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
1993 } else {
1994 m->replay_version = bad_replay_version; /* struct */
1995 m->user_version = le64_to_cpu(m->replay_version.version);
1996 }
eb845ff1 1997
fe5da05e
ID		 1998 if (version >= 6) {
1999 if (version >= 7)
2000 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
b0b31a8f
ID		 2001 else
2002 decode_redir = 1;
2003 } else {
2004 decode_redir = 0;
2005 }
2006
2007 if (decode_redir) {
fe5da05e
ID		 2008 ret = ceph_redirect_decode(&p, end, &m->redirect);
2009 if (ret)
2010 return ret;
205ee118 2011 } else {
fe5da05e 2012 ceph_oloc_init(&m->redirect.oloc);
205ee118 2013 }
f24e9980 2014
fe5da05e
ID		 2015 return 0;
2016
2017e_inval:
2018 return -EINVAL;
2019}
2020
2021/*
2022 * We are done with @req if
2023 * - @m is a safe reply, or
2024 * - @m is an unsafe reply and we didn't want a safe one
2025 */
2026static bool done_request(const struct ceph_osd_request *req,
2027 const struct MOSDOpReply *m)
2028{
2029 return (m->result < 0 ||
2030 (m->flags & CEPH_OSD_FLAG_ONDISK) ||
2031 !(req->r_flags & CEPH_OSD_FLAG_ONDISK));
2032}
205ee118 2033
fe5da05e
ID		 2034/*
2035 * handle osd op reply. either call the callback if it is specified,
2036 * or do the completion to wake up the waiting thread.
2037 *
2038 * ->r_unsafe_callback is set? yes no
2039 *
2040 * first reply is OK (needed r_cb/r_completion, r_cb/r_completion,
2041 * any or needed/got safe) r_safe_completion r_safe_completion
2042 *
2043 * first reply is unsafe r_unsafe_cb(true) (nothing)
2044 *
2045 * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion,
2046 * r_safe_completion r_safe_completion
2047 */
2048static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2049{
2050 struct ceph_osd_request *req;
2051 struct MOSDOpReply m;
2052 u64 tid = le64_to_cpu(msg->hdr.tid);
2053 u32 data_len = 0;
2054 bool already_acked;
2055 int ret;
2056 int i;
2057
2058 dout("%s msg %p tid %llu\n", __func__, msg, tid);
2059
2060 down_read(&osdc->map_sem);
2061 mutex_lock(&osdc->request_mutex);
2062 req = lookup_request(&osdc->requests, tid);
2063 if (!req) {
2064 dout("%s no tid %llu\n", __func__, tid);
2065 goto out_unlock;
2066 }
2067 ceph_osdc_get_request(req);
2068
2069 ret = decode_MOSDOpReply(msg, &m);
2070 if (ret) {
2071 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
2072 req->r_tid, ret);
2073 ceph_msg_dump(msg);
2074 goto fail_request;
2075 }
2076 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
2077 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
2078 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
2079 le64_to_cpu(m.replay_version.version), m.user_version);
2080
2081 if (m.retry_attempt >= 0) {
2082 if (m.retry_attempt != req->r_attempts - 1) {
2083 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
2084 req, req->r_tid, m.retry_attempt,
2085 req->r_attempts - 1);
2086 goto out_put;
2087 }
2088 } else {
2089 WARN_ON(1); /* MOSDOpReply v4 is assumed */
2090 }
2091
2092 if (!ceph_oloc_empty(&m.redirect.oloc)) {
2093 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
2094 m.redirect.oloc.pool);
205ee118 2095 __unregister_request(osdc, req);
205ee118 2096
fe5da05e 2097 ceph_oloc_copy(&req->r_t.target_oloc, &m.redirect.oloc);
205ee118
ID		 2098
2099 /*
2100 * Start redirect requests with nofail=true. If
2101 * mapping fails, request will end up on the notarget
2102 * list, waiting for the new osdmap (which can take
2103 * a while), even though the original request mapped
2104 * successfully. In the future we might want to follow
2105 * original request's nofail setting here.
2106 */
fe5da05e
ID		 2107 ret = __ceph_osdc_start_request(osdc, req, true);
2108 BUG_ON(ret);
205ee118 2109
fe5da05e 2110 goto out_put;
205ee118
ID		 2111 }
2112
fe5da05e
ID		 2113 if (m.num_ops != req->r_num_ops) {
2114 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
2115 req->r_num_ops, req->r_tid);
2116 goto fail_request;
f24e9980 2117 }
fe5da05e
ID		 2118 for (i = 0; i < req->r_num_ops; i++) {
2119 dout(" req %p tid %llu op %d rval %d len %u\n", req,
2120 req->r_tid, i, m.rval[i], m.outdata_len[i]);
2121 req->r_ops[i].rval = m.rval[i];
2122 req->r_ops[i].outdata_len = m.outdata_len[i];
2123 data_len += m.outdata_len[i];
2124 }
2125 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
2126 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
2127 le32_to_cpu(msg->hdr.data_len), req->r_tid);
2128 goto fail_request;
2129 }
2130 dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
2131 req, req->r_tid, req->r_got_reply, m.result, data_len);
2132
2133 already_acked = req->r_got_reply;
2134 if (!already_acked) {
2135 req->r_result = m.result ?: data_len;
2136 req->r_replay_version = m.replay_version; /* struct */
2137 req->r_got_reply = true;
2138 } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) {
2139 dout("req %p tid %llu dup ack\n", req, req->r_tid);
2140 goto out_put;
2141 }
2142
2143 if (done_request(req, &m)) {
f24e9980 2144 __unregister_request(osdc, req);
fe5da05e
ID		 2145 if (req->r_linger) {
2146 WARN_ON(req->r_unsafe_callback);
2147 __register_linger_request(osdc, req);
2148 }
2149 }
f24e9980
SW		 2150
2151 mutex_unlock(&osdc->request_mutex);
ff513ace 2152 up_read(&osdc->map_sem);
f24e9980 2153
fe5da05e
ID		 2154 if (done_request(req, &m)) {
2155 if (already_acked && req->r_unsafe_callback) {
2156 dout("req %p tid %llu safe-cb\n", req, req->r_tid);
61c5d6bf 2157 req->r_unsafe_callback(req, false);
fe5da05e
ID		 2158 } else {
2159 dout("req %p tid %llu cb\n", req, req->r_tid);
2160 __complete_request(req);
2161 }
2162 } else {
2163 if (req->r_unsafe_callback) {
2164 dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
2165 req->r_unsafe_callback(req, true);
2166 } else {
2167 WARN_ON(1);
2168 }
61c5d6bf 2169 }
fe5da05e
ID		 2170 if (m.flags & CEPH_OSD_FLAG_ONDISK)
2171 complete_all(&req->r_safe_completion);
f24e9980 2172
f24e9980
SW		 2173 ceph_osdc_put_request(req);
2174 return;
2175
fe5da05e 2176fail_request:
37c89bde
LW		 2177 req->r_result = -EIO;
2178 __unregister_request(osdc, req);
fe5da05e
ID		 2179 __complete_request(req);
2180 complete_all(&req->r_safe_completion);
2181out_put:
1b83bef2 2182 ceph_osdc_put_request(req);
fe5da05e 2183out_unlock:
8058fd45 2184 mutex_unlock(&osdc->request_mutex);
ff513ace 2185 up_read(&osdc->map_sem);
f24e9980
SW		 2186}
2187
42c1b124
ID		 2188static void set_pool_was_full(struct ceph_osd_client *osdc)
2189{
2190 struct rb_node *n;
2191
2192 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
2193 struct ceph_pg_pool_info *pi =
2194 rb_entry(n, struct ceph_pg_pool_info, node);
2195
2196 pi->was_full = __pool_full(pi);
2197 }
2198}
2199
6f6c7006 2200static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 2201{
f24e9980 2202 struct rb_node *p, *n;
f24e9980 2203
7eb71e03 2204 dout("%s %p\n", __func__, osdc);
6f6c7006
SW		 2205 for (p = rb_first(&osdc->osds); p; p = n) {
2206 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 2207
6f6c7006
SW		 2208 n = rb_next(p);
2209 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
2210 memcmp(&osd->o_con.peer_addr,
2211 ceph_osd_addr(osdc->osdmap,
2212 osd->o_osd),
2213 sizeof(struct ceph_entity_addr)) != 0)
2214 __reset_osd(osdc, osd);
f24e9980 2215 }
422d2cb8
YS		 2216}
2217
2218/*
6f6c7006
SW		 2219 * Requeue requests whose mapping to an OSD has changed. If requests map to
2220 * no osd, request a new map.
422d2cb8 2221 *
e6d50f67 2222 * Caller should hold map_sem for read.
422d2cb8 2223 */
9a1ea2db
JD		 2224static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
2225 bool force_resend_writes)
422d2cb8 2226{
a40c4f10 2227 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 2228 struct rb_node *p;
2229 int needmap = 0;
2230 int err;
9a1ea2db 2231 bool force_resend_req;
422d2cb8 2232
9a1ea2db
JD		 2233 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
2234 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 2235 mutex_lock(&osdc->request_mutex);
6194ea89 2236 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 2237 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 2238 p = rb_next(p);
ab60b16d
AE		 2239
2240 /*
2241 * For linger requests that have not yet been
2242 * registered, move them to the linger list; they'll
2243 * be sent to the osd in the loop below. Unregister
2244 * the request before re-registering it as a linger
2245 * request to ensure the __map_request() below
2246 * will decide it needs to be sent.
2247 */
2248 if (req->r_linger && list_empty(&req->r_linger_item)) {
2249 dout("%p tid %llu restart on osd%d\n",
2250 req, req->r_tid,
2251 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 2252 ceph_osdc_get_request(req);
ab60b16d
AE		 2253 __unregister_request(osdc, req);
2254 __register_linger_request(osdc, req);
96e4dac6 2255 ceph_osdc_put_request(req);
ab60b16d
AE		 2256 continue;
2257 }
2258
9a1ea2db
JD		 2259 force_resend_req = force_resend ||
2260 (force_resend_writes &&
2261 req->r_flags & CEPH_OSD_FLAG_WRITE);
2262 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 2263 if (err < 0)
2264 continue; /* error */
2265 if (req->r_osd == NULL) {
2266 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
2267 needmap++; /* request a newer map */
2268 } else if (err > 0) {
6194ea89
SW		 2269 if (!req->r_linger) {
2270 dout("%p tid %llu requeued on osd%d\n", req,
2271 req->r_tid,
2272 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 2273 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 2274 }
2275 }
a40c4f10
YS		 2276 }
2277
2278 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
2279 r_linger_item) {
2280 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
2281
9a1ea2db
JD		 2282 err = __map_request(osdc, req,
2283 force_resend || force_resend_writes);
ab60b16d 2284 dout("__map_request returned %d\n", err);
a40c4f10
YS		 2285 if (err < 0)
2286 continue; /* hrm! */
b0494532
ID		 2287 if (req->r_osd == NULL || err > 0) {
2288 if (req->r_osd == NULL) {
2289 dout("lingering %p tid %llu maps to no osd\n",
2290 req, req->r_tid);
2291 /*
2292 * A homeless lingering request makes
2293 * no sense, as it's job is to keep
2294 * a particular OSD connection open.
2295 * Request a newer map and kick the
2296 * request, knowing that it won't be
2297 * resent until we actually get a map
2298 * that can tell us where to send it.
2299 */
2300 needmap++;
2301 }
a40c4f10 2302
b0494532
ID		 2303 dout("kicking lingering %p tid %llu osd%d\n", req,
2304 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1);
2305 __register_request(osdc, req);
2306 __unregister_linger_request(osdc, req);
2307 }
6f6c7006 2308 }
14d2f38d 2309 reset_changed_osds(osdc);
f24e9980
SW		 2310 mutex_unlock(&osdc->request_mutex);
2311
2312 if (needmap) {
2313 dout("%d requests for down osds, need new map\n", needmap);
2314 ceph_monc_request_next_osdmap(&osdc->client->monc);
2315 }
422d2cb8 2316}
6f6c7006 2317
42c1b124
ID		 2318static int handle_one_map(struct ceph_osd_client *osdc,
2319 void *p, void *end, bool incremental)
2320{
2321 struct ceph_osdmap *newmap;
2322 struct rb_node *n;
2323 bool skipped_map = false;
2324 bool was_full;
2325
2326 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2327 set_pool_was_full(osdc);
2328
2329 if (incremental)
2330 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
2331 else
2332 newmap = ceph_osdmap_decode(&p, end);
2333 if (IS_ERR(newmap))
2334 return PTR_ERR(newmap);
2335
2336 if (newmap != osdc->osdmap) {
2337 /*
2338 * Preserve ->was_full before destroying the old map.
2339 * For pools that weren't in the old map, ->was_full
2340 * should be false.
2341 */
2342 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
2343 struct ceph_pg_pool_info *pi =
2344 rb_entry(n, struct ceph_pg_pool_info, node);
2345 struct ceph_pg_pool_info *old_pi;
2346
2347 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
2348 if (old_pi)
2349 pi->was_full = old_pi->was_full;
2350 else
2351 WARN_ON(pi->was_full);
2352 }
2353
2354 if (osdc->osdmap->epoch &&
2355 osdc->osdmap->epoch + 1 < newmap->epoch) {
2356 WARN_ON(incremental);
2357 skipped_map = true;
2358 }
2359
2360 ceph_osdmap_destroy(osdc->osdmap);
2361 osdc->osdmap = newmap;
2362 }
2363
2364 was_full &= !ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2365 kick_requests(osdc, skipped_map, was_full);
2366
2367 return 0;
2368}
6f6c7006 2369
f24e9980
SW		 2370/*
2371 * Process updated osd map.
2372 *
2373 * The message contains any number of incremental and full maps, normally
2374 * indicating some sort of topology change in the cluster. Kick requests
2375 * off to different OSDs as needed.
2376 */
2377void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2378{
42c1b124
ID		 2379 void *p = msg->front.iov_base;
2380 void *const end = p + msg->front.iov_len;
f24e9980
SW		 2381 u32 nr_maps, maplen;
2382 u32 epoch;
f24e9980 2383 struct ceph_fsid fsid;
42c1b124
ID		 2384 bool handled_incremental = false;
2385 bool was_pauserd, was_pausewr;
2386 bool pauserd, pausewr;
2387 int err;
f24e9980 2388
42c1b124
ID		 2389 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
2390 down_write(&osdc->map_sem);
f24e9980
SW		 2391
2392 /* verify fsid */
2393 ceph_decode_need(&p, end, sizeof(fsid), bad);
2394 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d 2395 if (ceph_check_fsid(osdc->client, &fsid) < 0)
42c1b124 2396 goto bad;
f24e9980 2397
42c1b124
ID		 2398 was_pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
2399 was_pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
2400 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2401 have_pool_full(osdc);
9a1ea2db 2402
f24e9980
SW		 2403 /* incremental maps */
2404 ceph_decode_32_safe(&p, end, nr_maps, bad);
2405 dout(" %d inc maps\n", nr_maps);
2406 while (nr_maps > 0) {
2407 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2408 epoch = ceph_decode_32(&p);
2409 maplen = ceph_decode_32(&p);
f24e9980 2410 ceph_decode_need(&p, end, maplen, bad);
42c1b124
ID		 2411 if (osdc->osdmap->epoch &&
2412 osdc->osdmap->epoch + 1 == epoch) {
f24e9980
SW		 2413 dout("applying incremental map %u len %d\n",
2414 epoch, maplen);
42c1b124
ID		 2415 err = handle_one_map(osdc, p, p + maplen, true);
2416 if (err)
f24e9980 2417 goto bad;
42c1b124 2418 handled_incremental = true;
f24e9980
SW		 2419 } else {
2420 dout("ignoring incremental map %u len %d\n",
2421 epoch, maplen);
2422 }
42c1b124 2423 p += maplen;
f24e9980
SW		 2424 nr_maps--;
2425 }
42c1b124 2426 if (handled_incremental)
f24e9980
SW		 2427 goto done;
2428
2429 /* full maps */
2430 ceph_decode_32_safe(&p, end, nr_maps, bad);
2431 dout(" %d full maps\n", nr_maps);
2432 while (nr_maps) {
2433 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2434 epoch = ceph_decode_32(&p);
2435 maplen = ceph_decode_32(&p);
f24e9980
SW		 2436 ceph_decode_need(&p, end, maplen, bad);
2437 if (nr_maps > 1) {
2438 dout("skipping non-latest full map %u len %d\n",
2439 epoch, maplen);
e5253a7b 2440 } else if (osdc->osdmap->epoch >= epoch) {
f24e9980
SW		 2441 dout("skipping full map %u len %d, "
2442 "older than our %u\n", epoch, maplen,
2443 osdc->osdmap->epoch);
2444 } else {
2445 dout("taking full map %u len %d\n", epoch, maplen);
42c1b124
ID		 2446 err = handle_one_map(osdc, p, p + maplen, false);
2447 if (err)
f24e9980 2448 goto bad;
f24e9980
SW		 2449 }
2450 p += maplen;
2451 nr_maps--;
2452 }
2453
2454done:
cd634fb6
SW		 2455 /*
2456 * subscribe to subsequent osdmap updates if full to ensure
2457 * we find out when we are no longer full and stop returning
2458 * ENOSPC.
2459 */
42c1b124
ID		 2460 pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
2461 pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
2462 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2463 have_pool_full(osdc);
2464 if (was_pauserd || was_pausewr || pauserd || pausewr)
2465 maybe_request_map(osdc);
cd634fb6 2466
f9d25199
AE		 2467 mutex_lock(&osdc->request_mutex);
2468 __send_queued(osdc);
2469 mutex_unlock(&osdc->request_mutex);
42c1b124
ID		 2470
2471 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2472 osdc->osdmap->epoch);
2473 up_write(&osdc->map_sem);
03066f23 2474 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2475 return;
2476
2477bad:
2478 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2479 ceph_msg_dump(msg);
f24e9980 2480 up_write(&osdc->map_sem);
f24e9980
SW		 2481}
2482
a40c4f10
YS		 2483/*
2484 * watch/notify callback event infrastructure
2485 *
2486 * These callbacks are used both for watch and notify operations.
2487 */
2488static void __release_event(struct kref *kref)
2489{
2490 struct ceph_osd_event *event =
2491 container_of(kref, struct ceph_osd_event, kref);
2492
2493 dout("__release_event %p\n", event);
2494 kfree(event);
2495}
2496
2497static void get_event(struct ceph_osd_event *event)
2498{
2499 kref_get(&event->kref);
2500}
2501
2502void ceph_osdc_put_event(struct ceph_osd_event *event)
2503{
2504 kref_put(&event->kref, __release_event);
2505}
2506EXPORT_SYMBOL(ceph_osdc_put_event);
2507
2508static void __insert_event(struct ceph_osd_client *osdc,
2509 struct ceph_osd_event *new)
2510{
2511 struct rb_node **p = &osdc->event_tree.rb_node;
2512 struct rb_node *parent = NULL;
2513 struct ceph_osd_event *event = NULL;
2514
2515 while (*p) {
2516 parent = *p;
2517 event = rb_entry(parent, struct ceph_osd_event, node);
2518 if (new->cookie < event->cookie)
2519 p = &(*p)->rb_left;
2520 else if (new->cookie > event->cookie)
2521 p = &(*p)->rb_right;
2522 else
2523 BUG();
2524 }
2525
2526 rb_link_node(&new->node, parent, p);
2527 rb_insert_color(&new->node, &osdc->event_tree);
2528}
2529
2530static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2531 u64 cookie)
2532{
2533 struct rb_node **p = &osdc->event_tree.rb_node;
2534 struct rb_node *parent = NULL;
2535 struct ceph_osd_event *event = NULL;
2536
2537 while (*p) {
2538 parent = *p;
2539 event = rb_entry(parent, struct ceph_osd_event, node);
2540 if (cookie < event->cookie)
2541 p = &(*p)->rb_left;
2542 else if (cookie > event->cookie)
2543 p = &(*p)->rb_right;
2544 else
2545 return event;
2546 }
2547 return NULL;
2548}
2549
2550static void __remove_event(struct ceph_osd_event *event)
2551{
2552 struct ceph_osd_client *osdc = event->osdc;
2553
2554 if (!RB_EMPTY_NODE(&event->node)) {
2555 dout("__remove_event removed %p\n", event);
2556 rb_erase(&event->node, &osdc->event_tree);
2557 ceph_osdc_put_event(event);
2558 } else {
2559 dout("__remove_event didn't remove %p\n", event);
2560 }
2561}
2562
2563int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2564 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2565 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2566{
2567 struct ceph_osd_event *event;
2568
2569 event = kmalloc(sizeof(*event), GFP_NOIO);
2570 if (!event)
2571 return -ENOMEM;
2572
2573 dout("create_event %p\n", event);
2574 event->cb = event_cb;
3c663bbd 2575 event->one_shot = 0;
a40c4f10
YS		 2576 event->data = data;
2577 event->osdc = osdc;
2578 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2579 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2580 kref_init(&event->kref); /* one ref for us */
2581 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2582
2583 spin_lock(&osdc->event_lock);
2584 event->cookie = ++osdc->event_count;
2585 __insert_event(osdc, event);
2586 spin_unlock(&osdc->event_lock);
2587
2588 *pevent = event;
2589 return 0;
2590}
2591EXPORT_SYMBOL(ceph_osdc_create_event);
2592
2593void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2594{
2595 struct ceph_osd_client *osdc = event->osdc;
2596
2597 dout("cancel_event %p\n", event);
2598 spin_lock(&osdc->event_lock);
2599 __remove_event(event);
2600 spin_unlock(&osdc->event_lock);
2601 ceph_osdc_put_event(event); /* caller's */
2602}
2603EXPORT_SYMBOL(ceph_osdc_cancel_event);
2604
2605
2606static void do_event_work(struct work_struct *work)
2607{
2608 struct ceph_osd_event_work *event_work =
2609 container_of(work, struct ceph_osd_event_work, work);
2610 struct ceph_osd_event *event = event_work->event;
2611 u64 ver = event_work->ver;
2612 u64 notify_id = event_work->notify_id;
2613 u8 opcode = event_work->opcode;
2614
2615 dout("do_event_work completing %p\n", event);
2616 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2617 dout("do_event_work completed %p\n", event);
2618 ceph_osdc_put_event(event);
2619 kfree(event_work);
2620}
2621
2622
2623/*
2624 * Process osd watch notifications
2625 */
3c663bbd
AE		 2626static void handle_watch_notify(struct ceph_osd_client *osdc,
2627 struct ceph_msg *msg)
a40c4f10
YS		 2628{
2629 void *p, *end;
2630 u8 proto_ver;
2631 u64 cookie, ver, notify_id;
2632 u8 opcode;
2633 struct ceph_osd_event *event;
2634 struct ceph_osd_event_work *event_work;
2635
2636 p = msg->front.iov_base;
2637 end = p + msg->front.iov_len;
2638
2639 ceph_decode_8_safe(&p, end, proto_ver, bad);
2640 ceph_decode_8_safe(&p, end, opcode, bad);
2641 ceph_decode_64_safe(&p, end, cookie, bad);
2642 ceph_decode_64_safe(&p, end, ver, bad);
2643 ceph_decode_64_safe(&p, end, notify_id, bad);
2644
2645 spin_lock(&osdc->event_lock);
2646 event = __find_event(osdc, cookie);
2647 if (event) {
3c663bbd 2648 BUG_ON(event->one_shot);
a40c4f10 2649 get_event(event);
a40c4f10
YS		 2650 }
2651 spin_unlock(&osdc->event_lock);
2652 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2653 cookie, ver, event);
2654 if (event) {
2655 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10 2656 if (!event_work) {
91883cd2
ID		 2657 pr_err("couldn't allocate event_work\n");
2658 ceph_osdc_put_event(event);
2659 return;
a40c4f10 2660 }
6b0ae409 2661 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2662 event_work->event = event;
2663 event_work->ver = ver;
2664 event_work->notify_id = notify_id;
2665 event_work->opcode = opcode;
a40c4f10 2666
91883cd2
ID		 2667 queue_work(osdc->notify_wq, &event_work->work);
2668 }
a40c4f10 2669
a40c4f10
YS		 2670 return;
2671
2672bad:
2673 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 2674}
2675
70636773
AE		 2676/*
2677 * Register request, send initial attempt.
2678 */
2679int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2680 struct ceph_osd_request *req,
2681 bool nofail)
2682{
0bbfdfe8 2683 int rc;
70636773 2684
f24e9980
SW		 2685 down_read(&osdc->map_sem);
2686 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2687
2688 rc = __ceph_osdc_start_request(osdc, req, nofail);
2689
f24e9980
SW		 2690 mutex_unlock(&osdc->request_mutex);
2691 up_read(&osdc->map_sem);
0bbfdfe8 2692
f24e9980
SW		 2693 return rc;
2694}
3d14c5d2 2695EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 2696
c9f9b93d
ID		 2697/*
2698 * Unregister a registered request. The request is not completed (i.e.
2699 * no callbacks or wakeups) - higher layers are supposed to know what
2700 * they are canceling.
2701 */
2702void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2703{
2704 struct ceph_osd_client *osdc = req->r_osdc;
2705
2706 mutex_lock(&osdc->request_mutex);
2707 if (req->r_linger)
2708 __unregister_linger_request(osdc, req);
2709 __unregister_request(osdc, req);
2710 mutex_unlock(&osdc->request_mutex);
2711
2712 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2713}
2714EXPORT_SYMBOL(ceph_osdc_cancel_request);
2715
f24e9980
SW		 2716/*
2717 * wait for a request to complete
2718 */
2719int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2720 struct ceph_osd_request *req)
2721{
2722 int rc;
2723
c9f9b93d
ID		 2724 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2725
f24e9980
SW		 2726 rc = wait_for_completion_interruptible(&req->r_completion);
2727 if (rc < 0) {
c9f9b93d
ID		 2728 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2729 ceph_osdc_cancel_request(req);
fe5da05e
ID		 2730
2731 /* kludge - need to to wake ceph_osdc_sync() */
2732 complete_all(&req->r_safe_completion);
f24e9980
SW		 2733 return rc;
2734 }
2735
c9f9b93d
ID		 2736 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2737 req->r_result);
f24e9980
SW		 2738 return req->r_result;
2739}
3d14c5d2 2740EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2741
2742/*
2743 * sync - wait for all in-flight requests to flush. avoid starvation.
2744 */
2745void ceph_osdc_sync(struct ceph_osd_client *osdc)
2746{
2747 struct ceph_osd_request *req;
2748 u64 last_tid, next_tid = 0;
2749
2750 mutex_lock(&osdc->request_mutex);
2751 last_tid = osdc->last_tid;
2752 while (1) {
2753 req = __lookup_request_ge(osdc, next_tid);
2754 if (!req)
2755 break;
2756 if (req->r_tid > last_tid)
2757 break;
2758
2759 next_tid = req->r_tid + 1;
2760 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2761 continue;
2762
2763 ceph_osdc_get_request(req);
2764 mutex_unlock(&osdc->request_mutex);
2765 dout("sync waiting on tid %llu (last is %llu)\n",
2766 req->r_tid, last_tid);
2767 wait_for_completion(&req->r_safe_completion);
2768 mutex_lock(&osdc->request_mutex);
2769 ceph_osdc_put_request(req);
2770 }
2771 mutex_unlock(&osdc->request_mutex);
2772 dout("sync done (thru tid %llu)\n", last_tid);
2773}
3d14c5d2 2774EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2775
dd935f44
JD		 2776/*
2777 * Call all pending notify callbacks - for use after a watch is
2778 * unregistered, to make sure no more callbacks for it will be invoked
2779 */
f6479449 2780void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44
JD		 2781{
2782 flush_workqueue(osdc->notify_wq);
2783}
2784EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2785
2786
f24e9980
SW		 2787/*
2788 * init, shutdown
2789 */
2790int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2791{
2792 int err;
2793
2794 dout("init\n");
2795 osdc->client = client;
f24e9980 2796 init_rwsem(&osdc->map_sem);
f24e9980 2797 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2798 osdc->last_tid = 0;
2799 osdc->osds = RB_ROOT;
f5a2041b 2800 INIT_LIST_HEAD(&osdc->osd_lru);
9dd2845c 2801 spin_lock_init(&osdc->osd_lru_lock);
f24e9980 2802 osdc->requests = RB_ROOT;
422d2cb8 2803 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2804 INIT_LIST_HEAD(&osdc->req_unsent);
2805 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2806 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2807 osdc->num_requests = 0;
2808 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2809 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2810 spin_lock_init(&osdc->event_lock);
2811 osdc->event_tree = RB_ROOT;
2812 osdc->event_count = 0;
f5a2041b 2813
5f44f142 2814 err = -ENOMEM;
e5253a7b
ID		 2815 osdc->osdmap = ceph_osdmap_alloc();
2816 if (!osdc->osdmap)
2817 goto out;
2818
9e767adb
ID		 2819 osdc->req_mempool = mempool_create_slab_pool(10,
2820 ceph_osd_request_cache);
f24e9980 2821 if (!osdc->req_mempool)
e5253a7b 2822 goto out_map;
f24e9980 2823
d50b409f 2824 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
711da55d 2825 PAGE_SIZE, 10, true, "osd_op");
f24e9980 2826 if (err < 0)
5f44f142 2827 goto out_mempool;
d50b409f 2828 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
711da55d 2829 PAGE_SIZE, 10, true, "osd_op_reply");
c16e7869
SW		 2830 if (err < 0)
2831 goto out_msgpool;
a40c4f10 2832
dbcae088 2833 err = -ENOMEM;
a40c4f10 2834 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2835 if (!osdc->notify_wq)
c172ec5c
ID		 2836 goto out_msgpool_reply;
2837
fbca9635
ID		 2838 schedule_delayed_work(&osdc->timeout_work,
2839 osdc->client->options->osd_keepalive_timeout);
b37ee1b9
ID		 2840 schedule_delayed_work(&osdc->osds_timeout_work,
2841 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
2842
f24e9980 2843 return 0;
5f44f142 2844
c172ec5c
ID		 2845out_msgpool_reply:
2846 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2847out_msgpool:
2848 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2849out_mempool:
2850 mempool_destroy(osdc->req_mempool);
e5253a7b
ID		 2851out_map:
2852 ceph_osdmap_destroy(osdc->osdmap);
5f44f142
SW		 2853out:
2854 return err;
f24e9980
SW		 2855}
2856
2857void ceph_osdc_stop(struct ceph_osd_client *osdc)
2858{
a40c4f10
YS		 2859 flush_workqueue(osdc->notify_wq);
2860 destroy_workqueue(osdc->notify_wq);
f24e9980 2861 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2862 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f
ID		 2863
2864 mutex_lock(&osdc->request_mutex);
2865 while (!RB_EMPTY_ROOT(&osdc->osds)) {
2866 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
2867 struct ceph_osd, o_node);
2868 remove_osd(osdc, osd);
2869 }
2870 mutex_unlock(&osdc->request_mutex);
2871
e5253a7b 2872 ceph_osdmap_destroy(osdc->osdmap);
f24e9980
SW		 2873 mempool_destroy(osdc->req_mempool);
2874 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2875 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2876}
2877
2878/*
2879 * Read some contiguous pages. If we cross a stripe boundary, shorten
2880 * *plen. Return number of bytes read, or error.
2881 */
2882int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2883 struct ceph_vino vino, struct ceph_file_layout *layout,
2884 u64 off, u64 *plen,
2885 u32 truncate_seq, u64 truncate_size,
b7495fc2 2886 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2887{
2888 struct ceph_osd_request *req;
2889 int rc = 0;
2890
2891 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2892 vino.snap, off, *plen);
715e4cd4 2893 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 2894 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2895 NULL, truncate_seq, truncate_size,
153e5167 2896 false);
6816282d
SW		 2897 if (IS_ERR(req))
2898 return PTR_ERR(req);
f24e9980
SW		 2899
2900 /* it may be a short read due to an object boundary */
406e2c9f 2901 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2902 pages, *plen, page_align, false, false);
f24e9980 2903
e0c59487 2904 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2905 off, *plen, *plen, page_align);
f24e9980
SW		 2906
2907 rc = ceph_osdc_start_request(osdc, req, false);
2908 if (!rc)
2909 rc = ceph_osdc_wait_request(osdc, req);
2910
2911 ceph_osdc_put_request(req);
2912 dout("readpages result %d\n", rc);
2913 return rc;
2914}
3d14c5d2 2915EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2916
2917/*
2918 * do a synchronous write on N pages
2919 */
2920int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2921 struct ceph_file_layout *layout,
2922 struct ceph_snap_context *snapc,
2923 u64 off, u64 len,
2924 u32 truncate_seq, u64 truncate_size,
2925 struct timespec *mtime,
24808826 2926 struct page **pages, int num_pages)
f24e9980
SW		 2927{
2928 struct ceph_osd_request *req;
2929 int rc = 0;
b7495fc2 2930 int page_align = off & ~PAGE_MASK;
f24e9980 2931
715e4cd4 2932 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
f24e9980 2933 CEPH_OSD_OP_WRITE,
24808826 2934 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2935 snapc, truncate_seq, truncate_size,
153e5167 2936 true);
6816282d
SW		 2937 if (IS_ERR(req))
2938 return PTR_ERR(req);
f24e9980
SW		 2939
2940 /* it may be a short write due to an object boundary */
406e2c9f 2941 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2942 false, false);
2943 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2944
bb873b53 2945 req->r_mtime = *mtime;
87f979d3 2946 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2947 if (!rc)
2948 rc = ceph_osdc_wait_request(osdc, req);
2949
2950 ceph_osdc_put_request(req);
2951 if (rc == 0)
2952 rc = len;
2953 dout("writepages result %d\n", rc);
2954 return rc;
2955}
3d14c5d2 2956EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2957
5522ae0b
AE		 2958int ceph_osdc_setup(void)
2959{
3f1af42a
ID		 2960 size_t size = sizeof(struct ceph_osd_request) +
2961 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
2962
5522ae0b 2963 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 2964 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
2965 0, 0, NULL);
5522ae0b
AE		 2966
2967 return ceph_osd_request_cache ? 0 : -ENOMEM;
2968}
2969EXPORT_SYMBOL(ceph_osdc_setup);
2970
2971void ceph_osdc_cleanup(void)
2972{
2973 BUG_ON(!ceph_osd_request_cache);
2974 kmem_cache_destroy(ceph_osd_request_cache);
2975 ceph_osd_request_cache = NULL;
2976}
2977EXPORT_SYMBOL(ceph_osdc_cleanup);
2978
f24e9980
SW		 2979/*
2980 * handle incoming message
2981 */
2982static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2983{
2984 struct ceph_osd *osd = con->private;
32c895e7 2985 struct ceph_osd_client *osdc;
f24e9980
SW		 2986 int type = le16_to_cpu(msg->hdr.type);
2987
2988 if (!osd)
4a32f93d 2989 goto out;
32c895e7 2990 osdc = osd->o_osdc;
f24e9980
SW		 2991
2992 switch (type) {
2993 case CEPH_MSG_OSD_MAP:
2994 ceph_osdc_handle_map(osdc, msg);
2995 break;
2996 case CEPH_MSG_OSD_OPREPLY:
70cf052d 2997 handle_reply(osdc, msg);
f24e9980 2998 break;
a40c4f10
YS		 2999 case CEPH_MSG_WATCH_NOTIFY:
3000 handle_watch_notify(osdc, msg);
3001 break;
f24e9980
SW		 3002
3003 default:
3004 pr_err("received unknown message type %d %s\n", type,
3005 ceph_msg_type_name(type));
3006 }
4a32f93d 3007out:
f24e9980
SW		 3008 ceph_msg_put(msg);
3009}
3010
5b3a4db3 3011/*
d15f9d69
ID		 3012 * Lookup and return message for incoming reply. Don't try to do
3013 * anything about a larger than preallocated data portion of the
3014 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 3015 */
3016static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 3017 struct ceph_msg_header *hdr,
3018 int *skip)
f24e9980
SW		 3019{
3020 struct ceph_osd *osd = con->private;
3021 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 3022 struct ceph_msg *m;
0547a9b3 3023 struct ceph_osd_request *req;
3f0a4ac5 3024 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 3025 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 3026 u64 tid;
f24e9980 3027
0547a9b3
YS		 3028 tid = le64_to_cpu(hdr->tid);
3029 mutex_lock(&osdc->request_mutex);
fcd00b68 3030 req = lookup_request(&osdc->requests, tid);
0547a9b3 3031 if (!req) {
cd8140c6
ID		 3032 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
3033 osd->o_osd, tid);
0547a9b3 3034 m = NULL;
d15f9d69 3035 *skip = 1;
0547a9b3
YS		 3036 goto out;
3037 }
c16e7869 3038
ace6d3a9 3039 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 3040
f2be82b0 3041 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 3042 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
3043 __func__, osd->o_osd, req->r_tid, front_len,
3044 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 3045 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
3046 false);
a79832f2 3047 if (!m)
c16e7869
SW		 3048 goto out;
3049 ceph_msg_put(req->r_reply);
3050 req->r_reply = m;
3051 }
0fff87ec 3052
d15f9d69
ID		 3053 if (data_len > req->r_reply->data_length) {
3054 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
3055 __func__, osd->o_osd, req->r_tid, data_len,
3056 req->r_reply->data_length);
3057 m = NULL;
3058 *skip = 1;
3059 goto out;
0547a9b3 3060 }
d15f9d69
ID		 3061
3062 m = ceph_msg_get(req->r_reply);
c16e7869 3063 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 3064
3065out:
3066 mutex_unlock(&osdc->request_mutex);
2450418c 3067 return m;
5b3a4db3
SW		 3068}
3069
3070static struct ceph_msg *alloc_msg(struct ceph_connection *con,
3071 struct ceph_msg_header *hdr,
3072 int *skip)
3073{
3074 struct ceph_osd *osd = con->private;
3075 int type = le16_to_cpu(hdr->type);
3076 int front = le32_to_cpu(hdr->front_len);
3077
1c20f2d2 3078 *skip = 0;
5b3a4db3
SW		 3079 switch (type) {
3080 case CEPH_MSG_OSD_MAP:
a40c4f10 3081 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 3082 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 3083 case CEPH_MSG_OSD_OPREPLY:
3084 return get_reply(con, hdr, skip);
3085 default:
3086 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
3087 osd->o_osd);
3088 *skip = 1;
3089 return NULL;
3090 }
f24e9980
SW		 3091}
3092
3093/*
3094 * Wrappers to refcount containing ceph_osd struct
3095 */
3096static struct ceph_connection *get_osd_con(struct ceph_connection *con)
3097{
3098 struct ceph_osd *osd = con->private;
3099 if (get_osd(osd))
3100 return con;
3101 return NULL;
3102}
3103
3104static void put_osd_con(struct ceph_connection *con)
3105{
3106 struct ceph_osd *osd = con->private;
3107 put_osd(osd);
3108}
3109
4e7a5dcd
SW		 3110/*
3111 * authentication
3112 */
a3530df3
AE		 3113/*
3114 * Note: returned pointer is the address of a structure that's
3115 * managed separately. Caller must *not* attempt to free it.
3116 */
3117static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 3118 int *proto, int force_new)
4e7a5dcd
SW		 3119{
3120 struct ceph_osd *o = con->private;
3121 struct ceph_osd_client *osdc = o->o_osdc;
3122 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 3123 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 3124
74f1869f 3125 if (force_new && auth->authorizer) {
6c1ea260 3126 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 3127 auth->authorizer = NULL;
3128 }
27859f97
SW		 3129 if (!auth->authorizer) {
3130 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
3131 auth);
4e7a5dcd 3132 if (ret)
a3530df3 3133 return ERR_PTR(ret);
27859f97
SW		 3134 } else {
3135 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 3136 auth);
3137 if (ret)
3138 return ERR_PTR(ret);
4e7a5dcd 3139 }
4e7a5dcd 3140 *proto = ac->protocol;
74f1869f 3141
a3530df3 3142 return auth;
4e7a5dcd
SW		 3143}
3144
3145
3146static int verify_authorizer_reply(struct ceph_connection *con, int len)
3147{
3148 struct ceph_osd *o = con->private;
3149 struct ceph_osd_client *osdc = o->o_osdc;
3150 struct ceph_auth_client *ac = osdc->client->monc.auth;
3151
27859f97 3152 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 3153}
3154
9bd2e6f8
SW		 3155static int invalidate_authorizer(struct ceph_connection *con)
3156{
3157 struct ceph_osd *o = con->private;
3158 struct ceph_osd_client *osdc = o->o_osdc;
3159 struct ceph_auth_client *ac = osdc->client->monc.auth;
3160
27859f97 3161 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 3162 return ceph_monc_validate_auth(&osdc->client->monc);
3163}
4e7a5dcd 3164
79dbd1ba 3165static int osd_sign_message(struct ceph_msg *msg)
33d07337 3166{
79dbd1ba 3167 struct ceph_osd *o = msg->con->private;
33d07337 3168 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 3169
33d07337
YZ		 3170 return ceph_auth_sign_message(auth, msg);
3171}
3172
79dbd1ba 3173static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 3174{
79dbd1ba 3175 struct ceph_osd *o = msg->con->private;
33d07337 3176 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 3177
33d07337
YZ		 3178 return ceph_auth_check_message_signature(auth, msg);
3179}
3180
9e32789f 3181static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 3182 .get = get_osd_con,
3183 .put = put_osd_con,
3184 .dispatch = dispatch,
4e7a5dcd
SW		 3185 .get_authorizer = get_authorizer,
3186 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 3187 .invalidate_authorizer = invalidate_authorizer,
f24e9980 3188 .alloc_msg = alloc_msg,
79dbd1ba
ID		 3189 .sign_message = osd_sign_message,
3190 .check_message_signature = osd_check_message_signature,
81b024e7 3191 .fault = osd_reset,
f24e9980 3192};
Linux kernel - Deliverables
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