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ceph: remove useless BUG_ON
[linux-2.6-block.git] / net / ceph / osd_client.c
CommitLineData
a4ce40a9 1
3d14c5d2 2#include <linux/ceph/ceph_debug.h>
f24e9980 3
3d14c5d2 4#include <linux/module.h>
f24e9980
SW		 5#include <linux/err.h>
6#include <linux/highmem.h>
7#include <linux/mm.h>
8#include <linux/pagemap.h>
9#include <linux/slab.h>
10#include <linux/uaccess.h>
68b4476b
YS		 11#ifdef CONFIG_BLOCK
12#include <linux/bio.h>
13#endif
f24e9980 14
3d14c5d2
YS		 15#include <linux/ceph/libceph.h>
16#include <linux/ceph/osd_client.h>
17#include <linux/ceph/messenger.h>
18#include <linux/ceph/decode.h>
19#include <linux/ceph/auth.h>
20#include <linux/ceph/pagelist.h>
f24e9980 21
c16e7869
SW		 22#define OSD_OP_FRONT_LEN 4096
23#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 24
5522ae0b
AE		 25static struct kmem_cache *ceph_osd_request_cache;
26
9e32789f 27static const struct ceph_connection_operations osd_con_ops;
f24e9980 28
f9d25199 29static void __send_queued(struct ceph_osd_client *osdc);
6f6c7006 30static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
a40c4f10
YS		 31static void __register_request(struct ceph_osd_client *osdc,
32 struct ceph_osd_request *req);
2cc6128a
ID		 33static void __unregister_request(struct ceph_osd_client *osdc,
34 struct ceph_osd_request *req);
a40c4f10
YS		 35static void __unregister_linger_request(struct ceph_osd_client *osdc,
36 struct ceph_osd_request *req);
2cc6128a 37static void __enqueue_request(struct ceph_osd_request *req);
56e925b6
SW		 38static void __send_request(struct ceph_osd_client *osdc,
39 struct ceph_osd_request *req);
f24e9980
SW		 40
41/*
42 * Implement client access to distributed object storage cluster.
43 *
44 * All data objects are stored within a cluster/cloud of OSDs, or
45 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
46 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
47 * remote daemons serving up and coordinating consistent and safe
48 * access to storage.
49 *
50 * Cluster membership and the mapping of data objects onto storage devices
51 * are described by the osd map.
52 *
53 * We keep track of pending OSD requests (read, write), resubmit
54 * requests to different OSDs when the cluster topology/data layout
55 * change, or retry the affected requests when the communications
56 * channel with an OSD is reset.
57 */
58
59/*
60 * calculate the mapping of a file extent onto an object, and fill out the
61 * request accordingly. shorten extent as necessary if it crosses an
62 * object boundary.
63 *
64 * fill osd op in request message.
65 */
dbe0fc41 66static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 67 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 68{
60e56f13 69 u64 orig_len = *plen;
d63b77f4 70 int r;
f24e9980 71
60e56f13 72 /* object extent? */
75d1c941
AE		 73 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
74 objoff, objlen);
d63b77f4
SW		 75 if (r < 0)
76 return r;
75d1c941
AE		 77 if (*objlen < orig_len) {
78 *plen = *objlen;
60e56f13
AE		 79 dout(" skipping last %llu, final file extent %llu~%llu\n",
80 orig_len - *plen, off, *plen);
81 }
82
75d1c941 83 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
f24e9980 84
3ff5f385 85 return 0;
f24e9980
SW		 86}
87
c54d47bf
AE		 88static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
89{
90 memset(osd_data, 0, sizeof (*osd_data));
91 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
92}
93
a4ce40a9 94static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 95 struct page **pages, u64 length, u32 alignment,
96 bool pages_from_pool, bool own_pages)
97{
98 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
99 osd_data->pages = pages;
100 osd_data->length = length;
101 osd_data->alignment = alignment;
102 osd_data->pages_from_pool = pages_from_pool;
103 osd_data->own_pages = own_pages;
104}
43bfe5de 105
a4ce40a9 106static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 107 struct ceph_pagelist *pagelist)
108{
109 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
110 osd_data->pagelist = pagelist;
111}
43bfe5de
AE		 112
113#ifdef CONFIG_BLOCK
a4ce40a9 114static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 115 struct bio *bio, size_t bio_length)
116{
117 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
118 osd_data->bio = bio;
119 osd_data->bio_length = bio_length;
120}
43bfe5de
AE		 121#endif /* CONFIG_BLOCK */
122
8a703a38
IC		 123#define osd_req_op_data(oreq, whch, typ, fld) \
124({ \
125 struct ceph_osd_request *__oreq = (oreq); \
126 unsigned int __whch = (whch); \
127 BUG_ON(__whch >= __oreq->r_num_ops); \
128 &__oreq->r_ops[__whch].typ.fld; \
129})
863c7eb5 130
49719778
AE		 131static struct ceph_osd_data *
132osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
133{
134 BUG_ON(which >= osd_req->r_num_ops);
135
136 return &osd_req->r_ops[which].raw_data_in;
137}
138
a4ce40a9
AE		 139struct ceph_osd_data *
140osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 141 unsigned int which)
a4ce40a9 142{
863c7eb5 143 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 144}
145EXPORT_SYMBOL(osd_req_op_extent_osd_data);
146
a4ce40a9
AE		 147struct ceph_osd_data *
148osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
149 unsigned int which)
150{
863c7eb5 151 return osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 152}
153EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
154
49719778
AE		 155void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
156 unsigned int which, struct page **pages,
157 u64 length, u32 alignment,
158 bool pages_from_pool, bool own_pages)
159{
160 struct ceph_osd_data *osd_data;
161
162 osd_data = osd_req_op_raw_data_in(osd_req, which);
163 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
164 pages_from_pool, own_pages);
165}
166EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
167
a4ce40a9 168void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 169 unsigned int which, struct page **pages,
170 u64 length, u32 alignment,
a4ce40a9
AE		 171 bool pages_from_pool, bool own_pages)
172{
173 struct ceph_osd_data *osd_data;
174
863c7eb5 175 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 176 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
177 pages_from_pool, own_pages);
a4ce40a9
AE		 178}
179EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
180
181void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 182 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 183{
184 struct ceph_osd_data *osd_data;
185
863c7eb5 186 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 187 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 188}
189EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
190
191#ifdef CONFIG_BLOCK
192void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 193 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 194{
195 struct ceph_osd_data *osd_data;
863c7eb5
AE		 196
197 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 198 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 199}
200EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
201#endif /* CONFIG_BLOCK */
202
203static void osd_req_op_cls_request_info_pagelist(
204 struct ceph_osd_request *osd_req,
205 unsigned int which, struct ceph_pagelist *pagelist)
206{
207 struct ceph_osd_data *osd_data;
208
863c7eb5 209 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 210 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 211}
212
04017e29
AE		 213void osd_req_op_cls_request_data_pagelist(
214 struct ceph_osd_request *osd_req,
215 unsigned int which, struct ceph_pagelist *pagelist)
216{
217 struct ceph_osd_data *osd_data;
218
863c7eb5 219 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29
AE		 220 ceph_osd_data_pagelist_init(osd_data, pagelist);
221}
222EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
223
6c57b554
AE		 224void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
225 unsigned int which, struct page **pages, u64 length,
226 u32 alignment, bool pages_from_pool, bool own_pages)
227{
228 struct ceph_osd_data *osd_data;
229
230 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
231 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
232 pages_from_pool, own_pages);
233}
234EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
235
a4ce40a9
AE		 236void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
237 unsigned int which, struct page **pages, u64 length,
238 u32 alignment, bool pages_from_pool, bool own_pages)
239{
240 struct ceph_osd_data *osd_data;
241
863c7eb5 242 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 243 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
244 pages_from_pool, own_pages);
a4ce40a9
AE		 245}
246EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
247
23c08a9c
AE		 248static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
249{
250 switch (osd_data->type) {
251 case CEPH_OSD_DATA_TYPE_NONE:
252 return 0;
253 case CEPH_OSD_DATA_TYPE_PAGES:
254 return osd_data->length;
255 case CEPH_OSD_DATA_TYPE_PAGELIST:
256 return (u64)osd_data->pagelist->length;
257#ifdef CONFIG_BLOCK
258 case CEPH_OSD_DATA_TYPE_BIO:
259 return (u64)osd_data->bio_length;
260#endif /* CONFIG_BLOCK */
261 default:
262 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
263 return 0;
264 }
265}
266
c54d47bf
AE		 267static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
268{
5476492f 269 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 270 int num_pages;
271
272 num_pages = calc_pages_for((u64)osd_data->alignment,
273 (u64)osd_data->length);
274 ceph_release_page_vector(osd_data->pages, num_pages);
275 }
5476492f
AE		 276 ceph_osd_data_init(osd_data);
277}
278
279static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
280 unsigned int which)
281{
282 struct ceph_osd_req_op *op;
283
284 BUG_ON(which >= osd_req->r_num_ops);
285 op = &osd_req->r_ops[which];
286
287 switch (op->op) {
288 case CEPH_OSD_OP_READ:
289 case CEPH_OSD_OP_WRITE:
e30b7577 290 case CEPH_OSD_OP_WRITEFULL:
5476492f
AE		 291 ceph_osd_data_release(&op->extent.osd_data);
292 break;
293 case CEPH_OSD_OP_CALL:
294 ceph_osd_data_release(&op->cls.request_info);
04017e29 295 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 296 ceph_osd_data_release(&op->cls.response_data);
297 break;
d74b50be
YZ		 298 case CEPH_OSD_OP_SETXATTR:
299 case CEPH_OSD_OP_CMPXATTR:
300 ceph_osd_data_release(&op->xattr.osd_data);
301 break;
66ba609f
YZ		 302 case CEPH_OSD_OP_STAT:
303 ceph_osd_data_release(&op->raw_data_in);
304 break;
5476492f
AE		 305 default:
306 break;
307 }
c54d47bf
AE		 308}
309
f24e9980
SW		 310/*
311 * requests
312 */
9e94af20 313static void ceph_osdc_release_request(struct kref *kref)
f24e9980 314{
9e94af20
ID		 315 struct ceph_osd_request *req = container_of(kref,
316 struct ceph_osd_request, r_kref);
5476492f 317 unsigned int which;
415e49a9 318
9e94af20
ID		 319 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
320 req->r_request, req->r_reply);
6562d661
ID		 321 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
322 WARN_ON(!list_empty(&req->r_req_lru_item));
323 WARN_ON(!list_empty(&req->r_osd_item));
324 WARN_ON(!list_empty(&req->r_linger_item));
325 WARN_ON(!list_empty(&req->r_linger_osd_item));
326 WARN_ON(req->r_osd);
9e94af20 327
415e49a9
SW		 328 if (req->r_request)
329 ceph_msg_put(req->r_request);
ace6d3a9 330 if (req->r_reply) {
8921d114 331 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 332 ceph_msg_put(req->r_reply);
ace6d3a9 333 }
0fff87ec 334
5476492f
AE		 335 for (which = 0; which < req->r_num_ops; which++)
336 osd_req_op_data_release(req, which);
0fff87ec 337
415e49a9
SW		 338 ceph_put_snap_context(req->r_snapc);
339 if (req->r_mempool)
340 mempool_free(req, req->r_osdc->req_mempool);
341 else
5522ae0b
AE		 342 kmem_cache_free(ceph_osd_request_cache, req);
343
f24e9980 344}
9e94af20
ID		 345
346void ceph_osdc_get_request(struct ceph_osd_request *req)
347{
348 dout("%s %p (was %d)\n", __func__, req,
349 atomic_read(&req->r_kref.refcount));
350 kref_get(&req->r_kref);
351}
352EXPORT_SYMBOL(ceph_osdc_get_request);
353
354void ceph_osdc_put_request(struct ceph_osd_request *req)
355{
356 dout("%s %p (was %d)\n", __func__, req,
357 atomic_read(&req->r_kref.refcount));
358 kref_put(&req->r_kref, ceph_osdc_release_request);
359}
360EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 361
3499e8a5 362struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 363 struct ceph_snap_context *snapc,
1b83bef2 364 unsigned int num_ops,
3499e8a5 365 bool use_mempool,
54a54007 366 gfp_t gfp_flags)
f24e9980
SW		 367{
368 struct ceph_osd_request *req;
369 struct ceph_msg *msg;
1b83bef2
SW		 370 size_t msg_size;
371
79528734
AE		 372 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
373 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
374
1b83bef2
SW		 375 msg_size = 4 + 4 + 8 + 8 + 4+8;
376 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
377 msg_size += 1 + 8 + 4 + 4; /* pg_t */
2d0ebc5d 378 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
1b83bef2
SW		 379 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
380 msg_size += 8; /* snapid */
381 msg_size += 8; /* snap_seq */
382 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
383 msg_size += 4;
f24e9980
SW		 384
385 if (use_mempool) {
3499e8a5 386 req = mempool_alloc(osdc->req_mempool, gfp_flags);
f24e9980
SW		 387 memset(req, 0, sizeof(*req));
388 } else {
5522ae0b 389 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
f24e9980
SW		 390 }
391 if (req == NULL)
a79832f2 392 return NULL;
f24e9980 393
f24e9980
SW		 394 req->r_osdc = osdc;
395 req->r_mempool = use_mempool;
79528734 396 req->r_num_ops = num_ops;
68b4476b 397
415e49a9 398 kref_init(&req->r_kref);
f24e9980
SW		 399 init_completion(&req->r_completion);
400 init_completion(&req->r_safe_completion);
a978fa20 401 RB_CLEAR_NODE(&req->r_node);
f24e9980 402 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 403 INIT_LIST_HEAD(&req->r_linger_item);
1d0326b1 404 INIT_LIST_HEAD(&req->r_linger_osd_item);
935b639a 405 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 406 INIT_LIST_HEAD(&req->r_osd_item);
407
3c972c95 408 req->r_base_oloc.pool = -1;
205ee118 409 req->r_target_oloc.pool = -1;
22116525 410
c16e7869
SW		 411 /* create reply message */
412 if (use_mempool)
413 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
414 else
415 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
b61c2763 416 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
a79832f2 417 if (!msg) {
c16e7869 418 ceph_osdc_put_request(req);
a79832f2 419 return NULL;
c16e7869
SW		 420 }
421 req->r_reply = msg;
422
423 /* create request message; allow space for oid */
f24e9980 424 if (use_mempool)
8f3bc053 425 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 426 else
b61c2763 427 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
a79832f2 428 if (!msg) {
f24e9980 429 ceph_osdc_put_request(req);
a79832f2 430 return NULL;
f24e9980 431 }
68b4476b 432
f24e9980 433 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5
YS		 434
435 req->r_request = msg;
3499e8a5
YS		 436
437 return req;
438}
3d14c5d2 439EXPORT_SYMBOL(ceph_osdc_alloc_request);
3499e8a5 440
a8dd0a37 441static bool osd_req_opcode_valid(u16 opcode)
68b4476b 442{
a8dd0a37 443 switch (opcode) {
70b5bfa3
ID		 444#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
445__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
446#undef GENERATE_CASE
a8dd0a37
AE		 447 default:
448 return false;
449 }
450}
451
33803f33
AE		 452/*
453 * This is an osd op init function for opcodes that have no data or
454 * other information associated with them. It also serves as a
455 * common init routine for all the other init functions, below.
456 */
c99d2d4a 457static struct ceph_osd_req_op *
49719778 458_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 459 u16 opcode, u32 flags)
33803f33 460{
c99d2d4a
AE		 461 struct ceph_osd_req_op *op;
462
463 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 464 BUG_ON(!osd_req_opcode_valid(opcode));
465
c99d2d4a 466 op = &osd_req->r_ops[which];
33803f33 467 memset(op, 0, sizeof (*op));
33803f33 468 op->op = opcode;
144cba14 469 op->flags = flags;
c99d2d4a
AE		 470
471 return op;
33803f33
AE		 472}
473
49719778 474void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 475 unsigned int which, u16 opcode, u32 flags)
49719778 476{
144cba14 477 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 478}
479EXPORT_SYMBOL(osd_req_op_init);
480
c99d2d4a
AE		 481void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
482 unsigned int which, u16 opcode,
33803f33
AE		 483 u64 offset, u64 length,
484 u64 truncate_size, u32 truncate_seq)
485{
144cba14
YZ		 486 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
487 opcode, 0);
33803f33
AE		 488 size_t payload_len = 0;
489
ad7a60de 490 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 491 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
492 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 493
33803f33
AE		 494 op->extent.offset = offset;
495 op->extent.length = length;
496 op->extent.truncate_size = truncate_size;
497 op->extent.truncate_seq = truncate_seq;
e30b7577 498 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 499 payload_len += length;
500
501 op->payload_len = payload_len;
502}
503EXPORT_SYMBOL(osd_req_op_extent_init);
504
c99d2d4a
AE		 505void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
506 unsigned int which, u64 length)
e5975c7c 507{
c99d2d4a
AE		 508 struct ceph_osd_req_op *op;
509 u64 previous;
510
511 BUG_ON(which >= osd_req->r_num_ops);
512 op = &osd_req->r_ops[which];
513 previous = op->extent.length;
e5975c7c
AE		 514
515 if (length == previous)
516 return; /* Nothing to do */
517 BUG_ON(length > previous);
518
519 op->extent.length = length;
520 op->payload_len -= previous - length;
521}
522EXPORT_SYMBOL(osd_req_op_extent_update);
523
c99d2d4a 524void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 525 u16 opcode, const char *class, const char *method)
33803f33 526{
144cba14
YZ		 527 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
528 opcode, 0);
5f562df5 529 struct ceph_pagelist *pagelist;
33803f33
AE		 530 size_t payload_len = 0;
531 size_t size;
532
533 BUG_ON(opcode != CEPH_OSD_OP_CALL);
534
5f562df5
AE		 535 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
536 BUG_ON(!pagelist);
537 ceph_pagelist_init(pagelist);
538
33803f33
AE		 539 op->cls.class_name = class;
540 size = strlen(class);
541 BUG_ON(size > (size_t) U8_MAX);
542 op->cls.class_len = size;
5f562df5 543 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 544 payload_len += size;
545
546 op->cls.method_name = method;
547 size = strlen(method);
548 BUG_ON(size > (size_t) U8_MAX);
549 op->cls.method_len = size;
5f562df5 550 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 551 payload_len += size;
552
a4ce40a9 553 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 554
33803f33
AE		 555 op->cls.argc = 0; /* currently unused */
556
557 op->payload_len = payload_len;
558}
559EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 560
d74b50be
YZ		 561int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
562 u16 opcode, const char *name, const void *value,
563 size_t size, u8 cmp_op, u8 cmp_mode)
564{
144cba14
YZ		 565 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
566 opcode, 0);
d74b50be
YZ		 567 struct ceph_pagelist *pagelist;
568 size_t payload_len;
569
570 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
571
572 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
573 if (!pagelist)
574 return -ENOMEM;
575
576 ceph_pagelist_init(pagelist);
577
578 payload_len = strlen(name);
579 op->xattr.name_len = payload_len;
580 ceph_pagelist_append(pagelist, name, payload_len);
581
582 op->xattr.value_len = size;
583 ceph_pagelist_append(pagelist, value, size);
584 payload_len += size;
585
586 op->xattr.cmp_op = cmp_op;
587 op->xattr.cmp_mode = cmp_mode;
588
589 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
590 op->payload_len = payload_len;
591 return 0;
592}
593EXPORT_SYMBOL(osd_req_op_xattr_init);
594
c99d2d4a
AE		 595void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
596 unsigned int which, u16 opcode,
33803f33
AE		 597 u64 cookie, u64 version, int flag)
598{
144cba14
YZ		 599 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
600 opcode, 0);
33803f33 601
c99d2d4a 602 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 603
604 op->watch.cookie = cookie;
9ef1ee5a 605 op->watch.ver = version;
33803f33 606 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 607 op->watch.flag = (u8)1;
33803f33
AE		 608}
609EXPORT_SYMBOL(osd_req_op_watch_init);
610
c647b8a8
ID		 611void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
612 unsigned int which,
613 u64 expected_object_size,
614 u64 expected_write_size)
615{
616 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 617 CEPH_OSD_OP_SETALLOCHINT,
618 0);
c647b8a8
ID		 619
620 op->alloc_hint.expected_object_size = expected_object_size;
621 op->alloc_hint.expected_write_size = expected_write_size;
622
623 /*
624 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
625 * not worth a feature bit. Set FAILOK per-op flag to make
626 * sure older osds don't trip over an unsupported opcode.
627 */
628 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
629}
630EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
631
90af3602 632static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 633 struct ceph_osd_data *osd_data)
634{
635 u64 length = ceph_osd_data_length(osd_data);
636
637 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
638 BUG_ON(length > (u64) SIZE_MAX);
639 if (length)
90af3602 640 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 641 length, osd_data->alignment);
642 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
643 BUG_ON(!length);
90af3602 644 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 645#ifdef CONFIG_BLOCK
646 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 647 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 648#endif
649 } else {
650 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
651 }
652}
653
a8dd0a37 654static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 655 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 656{
79528734 657 struct ceph_osd_req_op *src;
04017e29 658 struct ceph_osd_data *osd_data;
54d50649 659 u64 request_data_len = 0;
04017e29 660 u64 data_length;
a8dd0a37 661
79528734
AE		 662 BUG_ON(which >= req->r_num_ops);
663 src = &req->r_ops[which];
a8dd0a37
AE		 664 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
665 pr_err("unrecognized osd opcode %d\n", src->op);
666
667 return 0;
668 }
669
670 switch (src->op) {
671 case CEPH_OSD_OP_STAT:
49719778
AE		 672 osd_data = &src->raw_data_in;
673 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 674 break;
675 case CEPH_OSD_OP_READ:
676 case CEPH_OSD_OP_WRITE:
e30b7577 677 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 678 case CEPH_OSD_OP_ZERO:
ad7a60de 679 case CEPH_OSD_OP_TRUNCATE:
e30b7577
ID		 680 if (src->op == CEPH_OSD_OP_WRITE ||
681 src->op == CEPH_OSD_OP_WRITEFULL)
54d50649 682 request_data_len = src->extent.length;
a8dd0a37
AE		 683 dst->extent.offset = cpu_to_le64(src->extent.offset);
684 dst->extent.length = cpu_to_le64(src->extent.length);
685 dst->extent.truncate_size =
686 cpu_to_le64(src->extent.truncate_size);
687 dst->extent.truncate_seq =
688 cpu_to_le32(src->extent.truncate_seq);
04017e29 689 osd_data = &src->extent.osd_data;
e30b7577
ID		 690 if (src->op == CEPH_OSD_OP_WRITE ||
691 src->op == CEPH_OSD_OP_WRITEFULL)
04017e29 692 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 693 else
04017e29 694 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 695 break;
696 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 697 dst->cls.class_len = src->cls.class_len;
698 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 699 osd_data = &src->cls.request_info;
700 ceph_osdc_msg_data_add(req->r_request, osd_data);
701 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
702 request_data_len = osd_data->pagelist->length;
703
704 osd_data = &src->cls.request_data;
705 data_length = ceph_osd_data_length(osd_data);
706 if (data_length) {
707 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
708 dst->cls.indata_len = cpu_to_le32(data_length);
709 ceph_osdc_msg_data_add(req->r_request, osd_data);
710 src->payload_len += data_length;
711 request_data_len += data_length;
712 }
713 osd_data = &src->cls.response_data;
714 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 715 break;
716 case CEPH_OSD_OP_STARTSYNC:
717 break;
718 case CEPH_OSD_OP_NOTIFY_ACK:
719 case CEPH_OSD_OP_WATCH:
720 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
721 dst->watch.ver = cpu_to_le64(src->watch.ver);
722 dst->watch.flag = src->watch.flag;
723 break;
c647b8a8
ID		 724 case CEPH_OSD_OP_SETALLOCHINT:
725 dst->alloc_hint.expected_object_size =
726 cpu_to_le64(src->alloc_hint.expected_object_size);
727 dst->alloc_hint.expected_write_size =
728 cpu_to_le64(src->alloc_hint.expected_write_size);
729 break;
d74b50be
YZ		 730 case CEPH_OSD_OP_SETXATTR:
731 case CEPH_OSD_OP_CMPXATTR:
732 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
733 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
734 dst->xattr.cmp_op = src->xattr.cmp_op;
735 dst->xattr.cmp_mode = src->xattr.cmp_mode;
736 osd_data = &src->xattr.osd_data;
737 ceph_osdc_msg_data_add(req->r_request, osd_data);
738 request_data_len = osd_data->pagelist->length;
739 break;
864e9197
YZ		 740 case CEPH_OSD_OP_CREATE:
741 case CEPH_OSD_OP_DELETE:
742 break;
a8dd0a37 743 default:
4c46459c 744 pr_err("unsupported osd opcode %s\n",
8f63ca2d 745 ceph_osd_op_name(src->op));
4c46459c 746 WARN_ON(1);
a8dd0a37
AE		 747
748 return 0;
68b4476b 749 }
7b25bf5f 750
a8dd0a37 751 dst->op = cpu_to_le16(src->op);
7b25bf5f 752 dst->flags = cpu_to_le32(src->flags);
68b4476b 753 dst->payload_len = cpu_to_le32(src->payload_len);
175face2 754
54d50649 755 return request_data_len;
68b4476b
YS		 756}
757
3499e8a5
YS		 758/*
759 * build new request AND message, calculate layout, and adjust file
760 * extent as needed.
761 *
762 * if the file was recently truncated, we include information about its
763 * old and new size so that the object can be updated appropriately. (we
764 * avoid synchronously deleting truncated objects because it's slow.)
765 *
766 * if @do_sync, include a 'startsync' command so that the osd will flush
767 * data quickly.
768 */
769struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
770 struct ceph_file_layout *layout,
771 struct ceph_vino vino,
715e4cd4
YZ		 772 u64 off, u64 *plen,
773 unsigned int which, int num_ops,
3499e8a5
YS		 774 int opcode, int flags,
775 struct ceph_snap_context *snapc,
3499e8a5
YS		 776 u32 truncate_seq,
777 u64 truncate_size,
153e5167 778 bool use_mempool)
3499e8a5 779{
68b4476b 780 struct ceph_osd_request *req;
75d1c941
AE		 781 u64 objnum = 0;
782 u64 objoff = 0;
783 u64 objlen = 0;
6816282d 784 int r;
68b4476b 785
ad7a60de 786 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 787 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
788 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 789
acead002 790 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 791 GFP_NOFS);
4ad12621 792 if (!req)
6816282d 793 return ERR_PTR(-ENOMEM);
79528734 794
d178a9e7 795 req->r_flags = flags;
3499e8a5
YS		 796
797 /* calculate max write size */
a19dadfb 798 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 799 if (r < 0) {
800 ceph_osdc_put_request(req);
6816282d 801 return ERR_PTR(r);
3ff5f385 802 }
a19dadfb 803
864e9197 804 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 805 osd_req_op_init(req, which, opcode, 0);
864e9197
YZ		 806 } else {
807 u32 object_size = le32_to_cpu(layout->fl_object_size);
808 u32 object_base = off - objoff;
809 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
810 if (truncate_size <= object_base) {
811 truncate_size = 0;
812 } else {
813 truncate_size -= object_base;
814 if (truncate_size > object_size)
815 truncate_size = object_size;
816 }
ccca4e37 817 }
715e4cd4 818 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 819 truncate_size, truncate_seq);
820 }
d18d1e28 821
3c972c95 822 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
3499e8a5 823
3c972c95 824 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
4295f221 825 "%llx.%08llx", vino.ino, objnum);
3c972c95 826 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
dbe0fc41 827
f24e9980
SW		 828 return req;
829}
3d14c5d2 830EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 831
832/*
833 * We keep osd requests in an rbtree, sorted by ->r_tid.
834 */
835static void __insert_request(struct ceph_osd_client *osdc,
836 struct ceph_osd_request *new)
837{
838 struct rb_node **p = &osdc->requests.rb_node;
839 struct rb_node *parent = NULL;
840 struct ceph_osd_request *req = NULL;
841
842 while (*p) {
843 parent = *p;
844 req = rb_entry(parent, struct ceph_osd_request, r_node);
845 if (new->r_tid < req->r_tid)
846 p = &(*p)->rb_left;
847 else if (new->r_tid > req->r_tid)
848 p = &(*p)->rb_right;
849 else
850 BUG();
851 }
852
853 rb_link_node(&new->r_node, parent, p);
854 rb_insert_color(&new->r_node, &osdc->requests);
855}
856
857static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
858 u64 tid)
859{
860 struct ceph_osd_request *req;
861 struct rb_node *n = osdc->requests.rb_node;
862
863 while (n) {
864 req = rb_entry(n, struct ceph_osd_request, r_node);
865 if (tid < req->r_tid)
866 n = n->rb_left;
867 else if (tid > req->r_tid)
868 n = n->rb_right;
869 else
870 return req;
871 }
872 return NULL;
873}
874
875static struct ceph_osd_request *
876__lookup_request_ge(struct ceph_osd_client *osdc,
877 u64 tid)
878{
879 struct ceph_osd_request *req;
880 struct rb_node *n = osdc->requests.rb_node;
881
882 while (n) {
883 req = rb_entry(n, struct ceph_osd_request, r_node);
884 if (tid < req->r_tid) {
885 if (!n->rb_left)
886 return req;
887 n = n->rb_left;
888 } else if (tid > req->r_tid) {
889 n = n->rb_right;
890 } else {
891 return req;
892 }
893 }
894 return NULL;
895}
896
2cc6128a
ID		 897static void __kick_linger_request(struct ceph_osd_request *req)
898{
899 struct ceph_osd_client *osdc = req->r_osdc;
900 struct ceph_osd *osd = req->r_osd;
901
902 /*
903 * Linger requests need to be resent with a new tid to avoid
904 * the dup op detection logic on the OSDs. Achieve this with
905 * a re-register dance instead of open-coding.
906 */
907 ceph_osdc_get_request(req);
908 if (!list_empty(&req->r_linger_item))
909 __unregister_linger_request(osdc, req);
910 else
911 __unregister_request(osdc, req);
912 __register_request(osdc, req);
913 ceph_osdc_put_request(req);
914
915 /*
916 * Unless request has been registered as both normal and
917 * lingering, __unregister{,_linger}_request clears r_osd.
918 * However, here we need to preserve r_osd to make sure we
919 * requeue on the same OSD.
920 */
921 WARN_ON(req->r_osd || !osd);
922 req->r_osd = osd;
923
924 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
925 __enqueue_request(req);
926}
927
6f6c7006
SW		 928/*
929 * Resubmit requests pending on the given osd.
930 */
931static void __kick_osd_requests(struct ceph_osd_client *osdc,
932 struct ceph_osd *osd)
933{
a40c4f10 934 struct ceph_osd_request *req, *nreq;
e02493c0 935 LIST_HEAD(resend);
2cc6128a 936 LIST_HEAD(resend_linger);
6f6c7006
SW		 937 int err;
938
2cc6128a 939 dout("%s osd%d\n", __func__, osd->o_osd);
6f6c7006 940 err = __reset_osd(osdc, osd);
685a7555 941 if (err)
6f6c7006 942 return;
2cc6128a 943
e02493c0
AE		 944 /*
945 * Build up a list of requests to resend by traversing the
946 * osd's list of requests. Requests for a given object are
947 * sent in tid order, and that is also the order they're
948 * kept on this list. Therefore all requests that are in
949 * flight will be found first, followed by all requests that
950 * have not yet been sent. And to resend requests while
951 * preserving this order we will want to put any sent
952 * requests back on the front of the osd client's unsent
953 * list.
954 *
955 * So we build a separate ordered list of already-sent
956 * requests for the affected osd and splice it onto the
957 * front of the osd client's unsent list. Once we've seen a
958 * request that has not yet been sent we're done. Those
959 * requests are already sitting right where they belong.
960 */
6f6c7006 961 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 962 if (!req->r_sent)
963 break;
2cc6128a
ID		 964
965 if (!req->r_linger) {
966 dout("%s requeueing %p tid %llu\n", __func__, req,
967 req->r_tid);
968 list_move_tail(&req->r_req_lru_item, &resend);
a40c4f10 969 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2cc6128a
ID		 970 } else {
971 list_move_tail(&req->r_req_lru_item, &resend_linger);
972 }
a40c4f10 973 }
e02493c0 974 list_splice(&resend, &osdc->req_unsent);
a40c4f10 975
e02493c0 976 /*
2cc6128a
ID		 977 * Both registered and not yet registered linger requests are
978 * enqueued with a new tid on the same OSD. We add/move them
979 * to req_unsent/o_requests at the end to keep things in tid
980 * order.
e02493c0 981 */
a40c4f10 982 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1d0326b1 983 r_linger_osd_item) {
2cc6128a
ID		 984 WARN_ON(!list_empty(&req->r_req_lru_item));
985 __kick_linger_request(req);
6f6c7006 986 }
2cc6128a
ID		 987
988 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
989 __kick_linger_request(req);
6f6c7006
SW		 990}
991
f24e9980 992/*
81b024e7 993 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 994 */
995static void osd_reset(struct ceph_connection *con)
996{
997 struct ceph_osd *osd = con->private;
998 struct ceph_osd_client *osdc;
999
1000 if (!osd)
1001 return;
1002 dout("osd_reset osd%d\n", osd->o_osd);
1003 osdc = osd->o_osdc;
f24e9980 1004 down_read(&osdc->map_sem);
83aff95e
SW		 1005 mutex_lock(&osdc->request_mutex);
1006 __kick_osd_requests(osdc, osd);
f9d25199 1007 __send_queued(osdc);
83aff95e 1008 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1009 up_read(&osdc->map_sem);
1010}
1011
1012/*
1013 * Track open sessions with osds.
1014 */
e10006f8 1015static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1016{
1017 struct ceph_osd *osd;
1018
1019 osd = kzalloc(sizeof(*osd), GFP_NOFS);
1020 if (!osd)
1021 return NULL;
1022
1023 atomic_set(&osd->o_ref, 1);
1024 osd->o_osdc = osdc;
e10006f8 1025 osd->o_osd = onum;
f407731d 1026 RB_CLEAR_NODE(&osd->o_node);
f24e9980 1027 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 1028 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 1029 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 1030 osd->o_incarnation = 1;
1031
b7a9e5dd 1032 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1033
422d2cb8 1034 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 1035 return osd;
1036}
1037
1038static struct ceph_osd *get_osd(struct ceph_osd *osd)
1039{
1040 if (atomic_inc_not_zero(&osd->o_ref)) {
1041 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1042 atomic_read(&osd->o_ref));
1043 return osd;
1044 } else {
1045 dout("get_osd %p FAIL\n", osd);
1046 return NULL;
1047 }
1048}
1049
1050static void put_osd(struct ceph_osd *osd)
1051{
1052 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1053 atomic_read(&osd->o_ref) - 1);
b28ec2f3 1054 if (atomic_dec_and_test(&osd->o_ref)) {
79494d1b
SW		 1055 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
1056
b28ec2f3
ID		 1057 if (osd->o_auth.authorizer)
1058 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 1059 kfree(osd);
79494d1b 1060 }
f24e9980
SW		 1061}
1062
1063/*
1064 * remove an osd from our map
1065 */
f5a2041b 1066static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1067{
7eb71e03 1068 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
cc9f1f51
ID		 1069 WARN_ON(!list_empty(&osd->o_requests));
1070 WARN_ON(!list_empty(&osd->o_linger_requests));
7c6e6fc5 1071
f5a2041b 1072 list_del_init(&osd->o_osd_lru);
7eb71e03
ID		 1073 rb_erase(&osd->o_node, &osdc->osds);
1074 RB_CLEAR_NODE(&osd->o_node);
1075}
1076
1077static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1078{
1079 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1080
1081 if (!RB_EMPTY_NODE(&osd->o_node)) {
1082 ceph_con_close(&osd->o_con);
1083 __remove_osd(osdc, osd);
1084 put_osd(osd);
1085 }
f24e9980
SW		 1086}
1087
aca420bc
SW		 1088static void remove_all_osds(struct ceph_osd_client *osdc)
1089{
048a9d2d 1090 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 1091 mutex_lock(&osdc->request_mutex);
1092 while (!RB_EMPTY_ROOT(&osdc->osds)) {
1093 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
1094 struct ceph_osd, o_node);
7eb71e03 1095 remove_osd(osdc, osd);
aca420bc
SW		 1096 }
1097 mutex_unlock(&osdc->request_mutex);
1098}
1099
f5a2041b
YS		 1100static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1101 struct ceph_osd *osd)
1102{
bbf37ec3 1103 dout("%s %p\n", __func__, osd);
f5a2041b 1104 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1105
f5a2041b 1106 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
a319bf56 1107 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1108}
1109
bbf37ec3
ID		 1110static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1111 struct ceph_osd *osd)
1112{
1113 dout("%s %p\n", __func__, osd);
1114
1115 if (list_empty(&osd->o_requests) &&
1116 list_empty(&osd->o_linger_requests))
1117 __move_osd_to_lru(osdc, osd);
1118}
1119
f5a2041b
YS		 1120static void __remove_osd_from_lru(struct ceph_osd *osd)
1121{
1122 dout("__remove_osd_from_lru %p\n", osd);
1123 if (!list_empty(&osd->o_osd_lru))
1124 list_del_init(&osd->o_osd_lru);
1125}
1126
aca420bc 1127static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1128{
1129 struct ceph_osd *osd, *nosd;
1130
1131 dout("__remove_old_osds %p\n", osdc);
1132 mutex_lock(&osdc->request_mutex);
1133 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1134 if (time_before(jiffies, osd->lru_ttl))
f5a2041b 1135 break;
7eb71e03 1136 remove_osd(osdc, osd);
f5a2041b
YS		 1137 }
1138 mutex_unlock(&osdc->request_mutex);
1139}
1140
f24e9980
SW		 1141/*
1142 * reset osd connect
1143 */
f5a2041b 1144static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1145{
c3acb181 1146 struct ceph_entity_addr *peer_addr;
f24e9980 1147
f5a2041b 1148 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1149 if (list_empty(&osd->o_requests) &&
1150 list_empty(&osd->o_linger_requests)) {
7eb71e03 1151 remove_osd(osdc, osd);
c3acb181
AE		 1152 return -ENODEV;
1153 }
1154
1155 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1156 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1157 !ceph_con_opened(&osd->o_con)) {
1158 struct ceph_osd_request *req;
1159
0b4af2e8
ID		 1160 dout("osd addr hasn't changed and connection never opened, "
1161 "letting msgr retry\n");
87b315a5
SW		 1162 /* touch each r_stamp for handle_timeout()'s benfit */
1163 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1164 req->r_stamp = jiffies;
c3acb181
AE		 1165
1166 return -EAGAIN;
f24e9980 1167 }
c3acb181
AE		 1168
1169 ceph_con_close(&osd->o_con);
1170 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1171 osd->o_incarnation++;
1172
1173 return 0;
f24e9980
SW		 1174}
1175
1176static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1177{
1178 struct rb_node **p = &osdc->osds.rb_node;
1179 struct rb_node *parent = NULL;
1180 struct ceph_osd *osd = NULL;
1181
aca420bc 1182 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1183 while (*p) {
1184 parent = *p;
1185 osd = rb_entry(parent, struct ceph_osd, o_node);
1186 if (new->o_osd < osd->o_osd)
1187 p = &(*p)->rb_left;
1188 else if (new->o_osd > osd->o_osd)
1189 p = &(*p)->rb_right;
1190 else
1191 BUG();
1192 }
1193
1194 rb_link_node(&new->o_node, parent, p);
1195 rb_insert_color(&new->o_node, &osdc->osds);
1196}
1197
1198static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1199{
1200 struct ceph_osd *osd;
1201 struct rb_node *n = osdc->osds.rb_node;
1202
1203 while (n) {
1204 osd = rb_entry(n, struct ceph_osd, o_node);
1205 if (o < osd->o_osd)
1206 n = n->rb_left;
1207 else if (o > osd->o_osd)
1208 n = n->rb_right;
1209 else
1210 return osd;
1211 }
1212 return NULL;
1213}
1214
422d2cb8
YS		 1215static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1216{
1217 schedule_delayed_work(&osdc->timeout_work,
a319bf56 1218 osdc->client->options->osd_keepalive_timeout);
422d2cb8
YS		 1219}
1220
1221static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1222{
1223 cancel_delayed_work(&osdc->timeout_work);
1224}
f24e9980
SW		 1225
1226/*
1227 * Register request, assign tid. If this is the first request, set up
1228 * the timeout event.
1229 */
a40c4f10
YS		 1230static void __register_request(struct ceph_osd_client *osdc,
1231 struct ceph_osd_request *req)
f24e9980 1232{
f24e9980 1233 req->r_tid = ++osdc->last_tid;
6df058c0 1234 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1235 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1236 __insert_request(osdc, req);
1237 ceph_osdc_get_request(req);
1238 osdc->num_requests++;
f24e9980 1239 if (osdc->num_requests == 1) {
422d2cb8
YS		 1240 dout(" first request, scheduling timeout\n");
1241 __schedule_osd_timeout(osdc);
f24e9980 1242 }
a40c4f10
YS		 1243}
1244
f24e9980
SW		 1245/*
1246 * called under osdc->request_mutex
1247 */
1248static void __unregister_request(struct ceph_osd_client *osdc,
1249 struct ceph_osd_request *req)
1250{
35f9f8a0
SW		 1251 if (RB_EMPTY_NODE(&req->r_node)) {
1252 dout("__unregister_request %p tid %lld not registered\n",
1253 req, req->r_tid);
1254 return;
1255 }
1256
f24e9980
SW		 1257 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1258 rb_erase(&req->r_node, &osdc->requests);
6562d661 1259 RB_CLEAR_NODE(&req->r_node);
f24e9980
SW		 1260 osdc->num_requests--;
1261
0ba6478d
SW		 1262 if (req->r_osd) {
1263 /* make sure the original request isn't in flight. */
6740a845 1264 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1265
1266 list_del_init(&req->r_osd_item);
bbf37ec3 1267 maybe_move_osd_to_lru(osdc, req->r_osd);
4f23409e 1268 if (list_empty(&req->r_linger_osd_item))
a40c4f10 1269 req->r_osd = NULL;
0ba6478d 1270 }
f24e9980 1271
7d5f2481 1272 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1273 ceph_osdc_put_request(req);
1274
422d2cb8
YS		 1275 if (osdc->num_requests == 0) {
1276 dout(" no requests, canceling timeout\n");
1277 __cancel_osd_timeout(osdc);
f24e9980
SW		 1278 }
1279}
1280
1281/*
1282 * Cancel a previously queued request message
1283 */
1284static void __cancel_request(struct ceph_osd_request *req)
1285{
6bc18876 1286 if (req->r_sent && req->r_osd) {
6740a845 1287 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1288 req->r_sent = 0;
1289 }
1290}
1291
a40c4f10
YS		 1292static void __register_linger_request(struct ceph_osd_client *osdc,
1293 struct ceph_osd_request *req)
1294{
af593064
ID		 1295 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1296 WARN_ON(!req->r_linger);
1297
96e4dac6 1298 ceph_osdc_get_request(req);
a40c4f10 1299 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89 1300 if (req->r_osd)
1d0326b1 1301 list_add_tail(&req->r_linger_osd_item,
6194ea89 1302 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1303}
1304
1305static void __unregister_linger_request(struct ceph_osd_client *osdc,
1306 struct ceph_osd_request *req)
1307{
af593064
ID		 1308 WARN_ON(!req->r_linger);
1309
1310 if (list_empty(&req->r_linger_item)) {
1311 dout("%s %p tid %llu not registered\n", __func__, req,
1312 req->r_tid);
1313 return;
1314 }
1315
1316 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
61c74035 1317 list_del_init(&req->r_linger_item);
af593064 1318
a40c4f10 1319 if (req->r_osd) {
1d0326b1 1320 list_del_init(&req->r_linger_osd_item);
bbf37ec3 1321 maybe_move_osd_to_lru(osdc, req->r_osd);
fbdb9190
SW		 1322 if (list_empty(&req->r_osd_item))
1323 req->r_osd = NULL;
a40c4f10 1324 }
96e4dac6 1325 ceph_osdc_put_request(req);
a40c4f10
YS		 1326}
1327
a40c4f10
YS		 1328void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1329 struct ceph_osd_request *req)
1330{
1331 if (!req->r_linger) {
1332 dout("set_request_linger %p\n", req);
1333 req->r_linger = 1;
a40c4f10
YS		 1334 }
1335}
1336EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1337
d29adb34
JD		 1338/*
1339 * Returns whether a request should be blocked from being sent
1340 * based on the current osdmap and osd_client settings.
1341 *
1342 * Caller should hold map_sem for read.
1343 */
1344static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1345 struct ceph_osd_request *req)
1346{
1347 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1348 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1349 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1350 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1351 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1352}
1353
17a13e40
ID		 1354/*
1355 * Calculate mapping of a request to a PG. Takes tiering into account.
1356 */
1357static int __calc_request_pg(struct ceph_osdmap *osdmap,
1358 struct ceph_osd_request *req,
1359 struct ceph_pg *pg_out)
1360{
205ee118
ID		 1361 bool need_check_tiering;
1362
1363 need_check_tiering = false;
1364 if (req->r_target_oloc.pool == -1) {
1365 req->r_target_oloc = req->r_base_oloc; /* struct */
1366 need_check_tiering = true;
1367 }
1368 if (req->r_target_oid.name_len == 0) {
1369 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1370 need_check_tiering = true;
1371 }
1372
1373 if (need_check_tiering &&
1374 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
17a13e40
ID		 1375 struct ceph_pg_pool_info *pi;
1376
205ee118 1377 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
17a13e40
ID		 1378 if (pi) {
1379 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1380 pi->read_tier >= 0)
205ee118 1381 req->r_target_oloc.pool = pi->read_tier;
17a13e40
ID		 1382 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1383 pi->write_tier >= 0)
205ee118 1384 req->r_target_oloc.pool = pi->write_tier;
17a13e40
ID		 1385 }
1386 /* !pi is caught in ceph_oloc_oid_to_pg() */
1387 }
1388
205ee118
ID		 1389 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1390 &req->r_target_oid, pg_out);
17a13e40
ID		 1391}
1392
f671b581
ID		 1393static void __enqueue_request(struct ceph_osd_request *req)
1394{
1395 struct ceph_osd_client *osdc = req->r_osdc;
1396
1397 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1398 req->r_osd ? req->r_osd->o_osd : -1);
1399
1400 if (req->r_osd) {
1401 __remove_osd_from_lru(req->r_osd);
1402 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1403 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1404 } else {
1405 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1406 }
1407}
1408
f24e9980
SW		 1409/*
1410 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1411 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1412 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1413 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1414 *
1415 * Return 0 if unchanged, 1 if changed, or negative on error.
1416 *
1417 * Caller should hold map_sem for read and request_mutex.
1418 */
6f6c7006 1419static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1420 struct ceph_osd_request *req, int force_resend)
f24e9980 1421{
5b191d99 1422 struct ceph_pg pgid;
d85b7056 1423 int acting[CEPH_PG_MAX_SIZE];
8008ab10 1424 int num, o;
f24e9980 1425 int err;
d29adb34 1426 bool was_paused;
f24e9980 1427
6f6c7006 1428 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40
ID		 1429
1430 err = __calc_request_pg(osdc->osdmap, req, &pgid);
6f6c7006
SW		 1431 if (err) {
1432 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1433 return err;
6f6c7006 1434 }
7740a42f
SW		 1435 req->r_pgid = pgid;
1436
8008ab10
ID		 1437 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o);
1438 if (num < 0)
1439 num = 0;
f24e9980 1440
d29adb34
JD		 1441 was_paused = req->r_paused;
1442 req->r_paused = __req_should_be_paused(osdc, req);
1443 if (was_paused && !req->r_paused)
1444 force_resend = 1;
1445
38d6453c
SW		 1446 if ((!force_resend &&
1447 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1448 req->r_sent >= req->r_osd->o_incarnation &&
1449 req->r_num_pg_osds == num &&
1450 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
d29adb34
JD		 1451 (req->r_osd == NULL && o == -1) ||
1452 req->r_paused)
f24e9980
SW		 1453 return 0; /* no change */
1454
5b191d99
SW		 1455 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1456 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1457 req->r_osd ? req->r_osd->o_osd : -1);
1458
d85b7056
SW		 1459 /* record full pg acting set */
1460 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1461 req->r_num_pg_osds = num;
1462
f24e9980
SW		 1463 if (req->r_osd) {
1464 __cancel_request(req);
1465 list_del_init(&req->r_osd_item);
a390de02 1466 list_del_init(&req->r_linger_osd_item);
f24e9980
SW		 1467 req->r_osd = NULL;
1468 }
1469
1470 req->r_osd = __lookup_osd(osdc, o);
1471 if (!req->r_osd && o >= 0) {
c99eb1c7 1472 err = -ENOMEM;
e10006f8 1473 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1474 if (!req->r_osd) {
1475 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1476 goto out;
6f6c7006 1477 }
f24e9980 1478
6f6c7006 1479 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1480 __insert_osd(osdc, req->r_osd);
1481
b7a9e5dd
SW		 1482 ceph_con_open(&req->r_osd->o_con,
1483 CEPH_ENTITY_TYPE_OSD, o,
1484 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1485 }
1486
f671b581 1487 __enqueue_request(req);
d85b7056 1488 err = 1; /* osd or pg changed */
f24e9980
SW		 1489
1490out:
f24e9980
SW		 1491 return err;
1492}
1493
1494/*
1495 * caller should hold map_sem (for read) and request_mutex
1496 */
56e925b6
SW		 1497static void __send_request(struct ceph_osd_client *osdc,
1498 struct ceph_osd_request *req)
f24e9980 1499{
1b83bef2 1500 void *p;
f24e9980 1501
1b83bef2
SW		 1502 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1503 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1504 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1505
1506 /* fill in message content that changes each time we send it */
1507 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1508 put_unaligned_le32(req->r_flags, req->r_request_flags);
205ee118 1509 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1b83bef2
SW		 1510 p = req->r_request_pgid;
1511 ceph_encode_64(&p, req->r_pgid.pool);
1512 ceph_encode_32(&p, req->r_pgid.seed);
1513 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1514 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1515 sizeof(req->r_reassert_version));
2169aea6 1516
3dd72fc0 1517 req->r_stamp = jiffies;
07a27e22 1518 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1519
1520 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1521
f24e9980 1522 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1523
1524 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1525}
1526
6f6c7006
SW		 1527/*
1528 * Send any requests in the queue (req_unsent).
1529 */
f9d25199 1530static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1531{
1532 struct ceph_osd_request *req, *tmp;
1533
f9d25199
AE		 1534 dout("__send_queued\n");
1535 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1536 __send_request(osdc, req);
6f6c7006
SW		 1537}
1538
0bbfdfe8
ID		 1539/*
1540 * Caller should hold map_sem for read and request_mutex.
1541 */
1542static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1543 struct ceph_osd_request *req,
1544 bool nofail)
1545{
1546 int rc;
1547
1548 __register_request(osdc, req);
1549 req->r_sent = 0;
1550 req->r_got_reply = 0;
1551 rc = __map_request(osdc, req, 0);
1552 if (rc < 0) {
1553 if (nofail) {
1554 dout("osdc_start_request failed map, "
1555 " will retry %lld\n", req->r_tid);
1556 rc = 0;
1557 } else {
1558 __unregister_request(osdc, req);
1559 }
1560 return rc;
1561 }
1562
1563 if (req->r_osd == NULL) {
1564 dout("send_request %p no up osds in pg\n", req);
1565 ceph_monc_request_next_osdmap(&osdc->client->monc);
1566 } else {
1567 __send_queued(osdc);
1568 }
1569
1570 return 0;
1571}
1572
f24e9980
SW		 1573/*
1574 * Timeout callback, called every N seconds when 1 or more osd
1575 * requests has been active for more than N seconds. When this
1576 * happens, we ping all OSDs with requests who have timed out to
1577 * ensure any communications channel reset is detected. Reset the
1578 * request timeouts another N seconds in the future as we go.
1579 * Reschedule the timeout event another N seconds in future (unless
1580 * there are no open requests).
1581 */
1582static void handle_timeout(struct work_struct *work)
1583{
1584 struct ceph_osd_client *osdc =
1585 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 1586 struct ceph_options *opts = osdc->client->options;
83aff95e 1587 struct ceph_osd_request *req;
f24e9980 1588 struct ceph_osd *osd;
422d2cb8 1589 struct list_head slow_osds;
f24e9980
SW		 1590 dout("timeout\n");
1591 down_read(&osdc->map_sem);
1592
1593 ceph_monc_request_next_osdmap(&osdc->client->monc);
1594
1595 mutex_lock(&osdc->request_mutex);
f24e9980 1596
422d2cb8
YS		 1597 /*
1598 * ping osds that are a bit slow. this ensures that if there
1599 * is a break in the TCP connection we will notice, and reopen
1600 * a connection with that osd (from the fault callback).
1601 */
1602 INIT_LIST_HEAD(&slow_osds);
1603 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
a319bf56
ID		 1604 if (time_before(jiffies,
1605 req->r_stamp + opts->osd_keepalive_timeout))
422d2cb8
YS		 1606 break;
1607
1608 osd = req->r_osd;
1609 BUG_ON(!osd);
1610 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1611 req->r_tid, osd->o_osd);
422d2cb8
YS		 1612 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1613 }
1614 while (!list_empty(&slow_osds)) {
1615 osd = list_entry(slow_osds.next, struct ceph_osd,
1616 o_keepalive_item);
1617 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1618 ceph_con_keepalive(&osd->o_con);
1619 }
1620
422d2cb8 1621 __schedule_osd_timeout(osdc);
f9d25199 1622 __send_queued(osdc);
f24e9980 1623 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1624 up_read(&osdc->map_sem);
1625}
1626
f5a2041b
YS		 1627static void handle_osds_timeout(struct work_struct *work)
1628{
1629 struct ceph_osd_client *osdc =
1630 container_of(work, struct ceph_osd_client,
1631 osds_timeout_work.work);
a319bf56 1632 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
f5a2041b
YS		 1633
1634 dout("osds timeout\n");
1635 down_read(&osdc->map_sem);
aca420bc 1636 remove_old_osds(osdc);
f5a2041b
YS		 1637 up_read(&osdc->map_sem);
1638
1639 schedule_delayed_work(&osdc->osds_timeout_work,
1640 round_jiffies_relative(delay));
1641}
1642
205ee118
ID		 1643static int ceph_oloc_decode(void **p, void *end,
1644 struct ceph_object_locator *oloc)
1645{
1646 u8 struct_v, struct_cv;
1647 u32 len;
1648 void *struct_end;
1649 int ret = 0;
1650
1651 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1652 struct_v = ceph_decode_8(p);
1653 struct_cv = ceph_decode_8(p);
1654 if (struct_v < 3) {
1655 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1656 struct_v, struct_cv);
1657 goto e_inval;
1658 }
1659 if (struct_cv > 6) {
1660 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1661 struct_v, struct_cv);
1662 goto e_inval;
1663 }
1664 len = ceph_decode_32(p);
1665 ceph_decode_need(p, end, len, e_inval);
1666 struct_end = *p + len;
1667
1668 oloc->pool = ceph_decode_64(p);
1669 *p += 4; /* skip preferred */
1670
1671 len = ceph_decode_32(p);
1672 if (len > 0) {
1673 pr_warn("ceph_object_locator::key is set\n");
1674 goto e_inval;
1675 }
1676
1677 if (struct_v >= 5) {
1678 len = ceph_decode_32(p);
1679 if (len > 0) {
1680 pr_warn("ceph_object_locator::nspace is set\n");
1681 goto e_inval;
1682 }
1683 }
1684
1685 if (struct_v >= 6) {
1686 s64 hash = ceph_decode_64(p);
1687 if (hash != -1) {
1688 pr_warn("ceph_object_locator::hash is set\n");
1689 goto e_inval;
1690 }
1691 }
1692
1693 /* skip the rest */
1694 *p = struct_end;
1695out:
1696 return ret;
1697
1698e_inval:
1699 ret = -EINVAL;
1700 goto out;
1701}
1702
1703static int ceph_redirect_decode(void **p, void *end,
1704 struct ceph_request_redirect *redir)
1705{
1706 u8 struct_v, struct_cv;
1707 u32 len;
1708 void *struct_end;
1709 int ret;
1710
1711 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1712 struct_v = ceph_decode_8(p);
1713 struct_cv = ceph_decode_8(p);
1714 if (struct_cv > 1) {
1715 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1716 struct_v, struct_cv);
1717 goto e_inval;
1718 }
1719 len = ceph_decode_32(p);
1720 ceph_decode_need(p, end, len, e_inval);
1721 struct_end = *p + len;
1722
1723 ret = ceph_oloc_decode(p, end, &redir->oloc);
1724 if (ret)
1725 goto out;
1726
1727 len = ceph_decode_32(p);
1728 if (len > 0) {
1729 pr_warn("ceph_request_redirect::object_name is set\n");
1730 goto e_inval;
1731 }
1732
1733 len = ceph_decode_32(p);
1734 *p += len; /* skip osd_instructions */
1735
1736 /* skip the rest */
1737 *p = struct_end;
1738out:
1739 return ret;
1740
1741e_inval:
1742 ret = -EINVAL;
1743 goto out;
1744}
1745
25845472
SW		 1746static void complete_request(struct ceph_osd_request *req)
1747{
25845472
SW		 1748 complete_all(&req->r_safe_completion); /* fsync waiter */
1749}
1750
f24e9980
SW		 1751/*
1752 * handle osd op reply. either call the callback if it is specified,
1753 * or do the completion to wake up the waiting thread.
1754 */
70cf052d 1755static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg)
f24e9980 1756{
1b83bef2 1757 void *p, *end;
f24e9980 1758 struct ceph_osd_request *req;
205ee118 1759 struct ceph_request_redirect redir;
f24e9980 1760 u64 tid;
1b83bef2 1761 int object_len;
79528734
AE		 1762 unsigned int numops;
1763 int payload_len, flags;
0ceed5db 1764 s32 result;
1b83bef2
SW		 1765 s32 retry_attempt;
1766 struct ceph_pg pg;
1767 int err;
1768 u32 reassert_epoch;
1769 u64 reassert_version;
1770 u32 osdmap_epoch;
0d5af164 1771 int already_completed;
9fc6e064 1772 u32 bytes;
b0b31a8f 1773 u8 decode_redir;
79528734 1774 unsigned int i;
f24e9980 1775
6df058c0 1776 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1777 dout("handle_reply %p tid %llu\n", msg, tid);
1778
1779 p = msg->front.iov_base;
1780 end = p + msg->front.iov_len;
1781
1782 ceph_decode_need(&p, end, 4, bad);
1783 object_len = ceph_decode_32(&p);
1784 ceph_decode_need(&p, end, object_len, bad);
1785 p += object_len;
1786
ef4859d6 1787 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1788 if (err)
f24e9980 1789 goto bad;
1b83bef2
SW		 1790
1791 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1792 flags = ceph_decode_64(&p);
1793 result = ceph_decode_32(&p);
1794 reassert_epoch = ceph_decode_32(&p);
1795 reassert_version = ceph_decode_64(&p);
1796 osdmap_epoch = ceph_decode_32(&p);
1797
f24e9980 1798 /* lookup */
ff513ace 1799 down_read(&osdc->map_sem);
f24e9980
SW		 1800 mutex_lock(&osdc->request_mutex);
1801 req = __lookup_request(osdc, tid);
1802 if (req == NULL) {
1803 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1804 goto bad_mutex;
f24e9980
SW		 1805 }
1806 ceph_osdc_get_request(req);
1b83bef2
SW		 1807
1808 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1809 req, result);
1810
18741196 1811 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2
SW		 1812 numops = ceph_decode_32(&p);
1813 if (numops > CEPH_OSD_MAX_OP)
1814 goto bad_put;
1815 if (numops != req->r_num_ops)
1816 goto bad_put;
1817 payload_len = 0;
18741196 1818 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1819 for (i = 0; i < numops; i++) {
1820 struct ceph_osd_op *op = p;
1821 int len;
1822
1823 len = le32_to_cpu(op->payload_len);
1824 req->r_reply_op_len[i] = len;
1825 dout(" op %d has %d bytes\n", i, len);
1826 payload_len += len;
1827 p += sizeof(*op);
1828 }
9fc6e064
AE		 1829 bytes = le32_to_cpu(msg->hdr.data_len);
1830 if (payload_len != bytes) {
b9a67899
JP		 1831 pr_warn("sum of op payload lens %d != data_len %d\n",
1832 payload_len, bytes);
1b83bef2
SW		 1833 goto bad_put;
1834 }
1835
18741196 1836 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1837 retry_attempt = ceph_decode_32(&p);
1838 for (i = 0; i < numops; i++)
1839 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1840
205ee118
ID		 1841 if (le16_to_cpu(msg->hdr.version) >= 6) {
1842 p += 8 + 4; /* skip replay_version */
1843 p += 8; /* skip user_version */
eb845ff1 1844
b0b31a8f
ID		 1845 if (le16_to_cpu(msg->hdr.version) >= 7)
1846 ceph_decode_8_safe(&p, end, decode_redir, bad_put);
1847 else
1848 decode_redir = 1;
1849 } else {
1850 decode_redir = 0;
1851 }
1852
1853 if (decode_redir) {
205ee118
ID		 1854 err = ceph_redirect_decode(&p, end, &redir);
1855 if (err)
1856 goto bad_put;
1857 } else {
1858 redir.oloc.pool = -1;
1859 }
f24e9980 1860
205ee118
ID		 1861 if (redir.oloc.pool != -1) {
1862 dout("redirect pool %lld\n", redir.oloc.pool);
1863
1864 __unregister_request(osdc, req);
205ee118
ID		 1865
1866 req->r_target_oloc = redir.oloc; /* struct */
1867
1868 /*
1869 * Start redirect requests with nofail=true. If
1870 * mapping fails, request will end up on the notarget
1871 * list, waiting for the new osdmap (which can take
1872 * a while), even though the original request mapped
1873 * successfully. In the future we might want to follow
1874 * original request's nofail setting here.
1875 */
ff513ace 1876 err = __ceph_osdc_start_request(osdc, req, true);
205ee118
ID		 1877 BUG_ON(err);
1878
ff513ace 1879 goto out_unlock;
205ee118
ID		 1880 }
1881
1882 already_completed = req->r_got_reply;
1883 if (!req->r_got_reply) {
1b83bef2 1884 req->r_result = result;
f24e9980
SW		 1885 dout("handle_reply result %d bytes %d\n", req->r_result,
1886 bytes);
1887 if (req->r_result == 0)
1888 req->r_result = bytes;
1889
1890 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1891 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1892 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1893
1894 req->r_got_reply = 1;
1895 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1896 dout("handle_reply tid %llu dup ack\n", tid);
ff513ace 1897 goto out_unlock;
f24e9980
SW		 1898 }
1899
1900 dout("handle_reply tid %llu flags %d\n", tid, flags);
1901
a40c4f10
YS		 1902 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1903 __register_linger_request(osdc, req);
1904
f24e9980 1905 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1906 if (result < 0 ||
1907 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1908 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1909 __unregister_request(osdc, req);
1910
1911 mutex_unlock(&osdc->request_mutex);
ff513ace 1912 up_read(&osdc->map_sem);
f24e9980 1913
eb845ff1 1914 if (!already_completed) {
61c5d6bf
YZ		 1915 if (req->r_unsafe_callback &&
1916 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1917 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1918 if (req->r_callback)
1919 req->r_callback(req, msg);
1920 else
1921 complete_all(&req->r_completion);
1922 }
f24e9980 1923
61c5d6bf
YZ		 1924 if (flags & CEPH_OSD_FLAG_ONDISK) {
1925 if (req->r_unsafe_callback && already_completed)
1926 req->r_unsafe_callback(req, false);
25845472 1927 complete_request(req);
61c5d6bf 1928 }
f24e9980 1929
ff513ace 1930out:
a40c4f10 1931 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1932 ceph_osdc_put_request(req);
1933 return;
ff513ace
ID		 1934out_unlock:
1935 mutex_unlock(&osdc->request_mutex);
1936 up_read(&osdc->map_sem);
1937 goto out;
f24e9980 1938
1b83bef2 1939bad_put:
37c89bde
LW		 1940 req->r_result = -EIO;
1941 __unregister_request(osdc, req);
1942 if (req->r_callback)
1943 req->r_callback(req, msg);
1944 else
1945 complete_all(&req->r_completion);
1946 complete_request(req);
1b83bef2 1947 ceph_osdc_put_request(req);
8058fd45
AE		 1948bad_mutex:
1949 mutex_unlock(&osdc->request_mutex);
ff513ace 1950 up_read(&osdc->map_sem);
f24e9980 1951bad:
1b83bef2
SW		 1952 pr_err("corrupt osd_op_reply got %d %d\n",
1953 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1954 ceph_msg_dump(msg);
f24e9980
SW		 1955}
1956
6f6c7006 1957static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1958{
f24e9980 1959 struct rb_node *p, *n;
f24e9980 1960
7eb71e03 1961 dout("%s %p\n", __func__, osdc);
6f6c7006
SW		 1962 for (p = rb_first(&osdc->osds); p; p = n) {
1963 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1964
6f6c7006
SW		 1965 n = rb_next(p);
1966 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1967 memcmp(&osd->o_con.peer_addr,
1968 ceph_osd_addr(osdc->osdmap,
1969 osd->o_osd),
1970 sizeof(struct ceph_entity_addr)) != 0)
1971 __reset_osd(osdc, osd);
f24e9980 1972 }
422d2cb8
YS		 1973}
1974
1975/*
6f6c7006
SW		 1976 * Requeue requests whose mapping to an OSD has changed. If requests map to
1977 * no osd, request a new map.
422d2cb8 1978 *
e6d50f67 1979 * Caller should hold map_sem for read.
422d2cb8 1980 */
9a1ea2db
JD		 1981static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1982 bool force_resend_writes)
422d2cb8 1983{
a40c4f10 1984 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1985 struct rb_node *p;
1986 int needmap = 0;
1987 int err;
9a1ea2db 1988 bool force_resend_req;
422d2cb8 1989
9a1ea2db
JD		 1990 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1991 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1992 mutex_lock(&osdc->request_mutex);
6194ea89 1993 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1994 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1995 p = rb_next(p);
ab60b16d
AE		 1996
1997 /*
1998 * For linger requests that have not yet been
1999 * registered, move them to the linger list; they'll
2000 * be sent to the osd in the loop below. Unregister
2001 * the request before re-registering it as a linger
2002 * request to ensure the __map_request() below
2003 * will decide it needs to be sent.
2004 */
2005 if (req->r_linger && list_empty(&req->r_linger_item)) {
2006 dout("%p tid %llu restart on osd%d\n",
2007 req, req->r_tid,
2008 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 2009 ceph_osdc_get_request(req);
ab60b16d
AE		 2010 __unregister_request(osdc, req);
2011 __register_linger_request(osdc, req);
96e4dac6 2012 ceph_osdc_put_request(req);
ab60b16d
AE		 2013 continue;
2014 }
2015
9a1ea2db
JD		 2016 force_resend_req = force_resend ||
2017 (force_resend_writes &&
2018 req->r_flags & CEPH_OSD_FLAG_WRITE);
2019 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 2020 if (err < 0)
2021 continue; /* error */
2022 if (req->r_osd == NULL) {
2023 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
2024 needmap++; /* request a newer map */
2025 } else if (err > 0) {
6194ea89
SW		 2026 if (!req->r_linger) {
2027 dout("%p tid %llu requeued on osd%d\n", req,
2028 req->r_tid,
2029 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 2030 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 2031 }
2032 }
a40c4f10
YS		 2033 }
2034
2035 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
2036 r_linger_item) {
2037 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
2038
9a1ea2db
JD		 2039 err = __map_request(osdc, req,
2040 force_resend || force_resend_writes);
ab60b16d 2041 dout("__map_request returned %d\n", err);
a40c4f10
YS		 2042 if (err < 0)
2043 continue; /* hrm! */
b0494532
ID		 2044 if (req->r_osd == NULL || err > 0) {
2045 if (req->r_osd == NULL) {
2046 dout("lingering %p tid %llu maps to no osd\n",
2047 req, req->r_tid);
2048 /*
2049 * A homeless lingering request makes
2050 * no sense, as it's job is to keep
2051 * a particular OSD connection open.
2052 * Request a newer map and kick the
2053 * request, knowing that it won't be
2054 * resent until we actually get a map
2055 * that can tell us where to send it.
2056 */
2057 needmap++;
2058 }
a40c4f10 2059
b0494532
ID		 2060 dout("kicking lingering %p tid %llu osd%d\n", req,
2061 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1);
2062 __register_request(osdc, req);
2063 __unregister_linger_request(osdc, req);
2064 }
6f6c7006 2065 }
14d2f38d 2066 reset_changed_osds(osdc);
f24e9980
SW		 2067 mutex_unlock(&osdc->request_mutex);
2068
2069 if (needmap) {
2070 dout("%d requests for down osds, need new map\n", needmap);
2071 ceph_monc_request_next_osdmap(&osdc->client->monc);
2072 }
422d2cb8 2073}
6f6c7006
SW		 2074
2075
f24e9980
SW		 2076/*
2077 * Process updated osd map.
2078 *
2079 * The message contains any number of incremental and full maps, normally
2080 * indicating some sort of topology change in the cluster. Kick requests
2081 * off to different OSDs as needed.
2082 */
2083void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2084{
2085 void *p, *end, *next;
2086 u32 nr_maps, maplen;
2087 u32 epoch;
2088 struct ceph_osdmap *newmap = NULL, *oldmap;
2089 int err;
2090 struct ceph_fsid fsid;
9a1ea2db 2091 bool was_full;
f24e9980
SW		 2092
2093 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2094 p = msg->front.iov_base;
2095 end = p + msg->front.iov_len;
2096
2097 /* verify fsid */
2098 ceph_decode_need(&p, end, sizeof(fsid), bad);
2099 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 2100 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2101 return;
f24e9980
SW		 2102
2103 down_write(&osdc->map_sem);
2104
9a1ea2db
JD		 2105 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2106
f24e9980
SW		 2107 /* incremental maps */
2108 ceph_decode_32_safe(&p, end, nr_maps, bad);
2109 dout(" %d inc maps\n", nr_maps);
2110 while (nr_maps > 0) {
2111 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2112 epoch = ceph_decode_32(&p);
2113 maplen = ceph_decode_32(&p);
f24e9980
SW		 2114 ceph_decode_need(&p, end, maplen, bad);
2115 next = p + maplen;
2116 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2117 dout("applying incremental map %u len %d\n",
2118 epoch, maplen);
2119 newmap = osdmap_apply_incremental(&p, next,
2120 osdc->osdmap,
15d9882c 2121 &osdc->client->msgr);
f24e9980
SW		 2122 if (IS_ERR(newmap)) {
2123 err = PTR_ERR(newmap);
2124 goto bad;
2125 }
30dc6381 2126 BUG_ON(!newmap);
f24e9980
SW		 2127 if (newmap != osdc->osdmap) {
2128 ceph_osdmap_destroy(osdc->osdmap);
2129 osdc->osdmap = newmap;
2130 }
9a1ea2db
JD		 2131 was_full = was_full ||
2132 ceph_osdmap_flag(osdc->osdmap,
2133 CEPH_OSDMAP_FULL);
2134 kick_requests(osdc, 0, was_full);
f24e9980
SW		 2135 } else {
2136 dout("ignoring incremental map %u len %d\n",
2137 epoch, maplen);
2138 }
2139 p = next;
2140 nr_maps--;
2141 }
2142 if (newmap)
2143 goto done;
2144
2145 /* full maps */
2146 ceph_decode_32_safe(&p, end, nr_maps, bad);
2147 dout(" %d full maps\n", nr_maps);
2148 while (nr_maps) {
2149 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2150 epoch = ceph_decode_32(&p);
2151 maplen = ceph_decode_32(&p);
f24e9980
SW		 2152 ceph_decode_need(&p, end, maplen, bad);
2153 if (nr_maps > 1) {
2154 dout("skipping non-latest full map %u len %d\n",
2155 epoch, maplen);
2156 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2157 dout("skipping full map %u len %d, "
2158 "older than our %u\n", epoch, maplen,
2159 osdc->osdmap->epoch);
2160 } else {
38d6453c
SW		 2161 int skipped_map = 0;
2162
f24e9980 2163 dout("taking full map %u len %d\n", epoch, maplen);
a2505d63 2164 newmap = ceph_osdmap_decode(&p, p+maplen);
f24e9980
SW		 2165 if (IS_ERR(newmap)) {
2166 err = PTR_ERR(newmap);
2167 goto bad;
2168 }
30dc6381 2169 BUG_ON(!newmap);
f24e9980
SW		 2170 oldmap = osdc->osdmap;
2171 osdc->osdmap = newmap;
38d6453c
SW		 2172 if (oldmap) {
2173 if (oldmap->epoch + 1 < newmap->epoch)
2174 skipped_map = 1;
f24e9980 2175 ceph_osdmap_destroy(oldmap);
38d6453c 2176 }
9a1ea2db
JD		 2177 was_full = was_full ||
2178 ceph_osdmap_flag(osdc->osdmap,
2179 CEPH_OSDMAP_FULL);
2180 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2181 }
2182 p += maplen;
2183 nr_maps--;
2184 }
2185
b72e19b9
DC		 2186 if (!osdc->osdmap)
2187 goto bad;
f24e9980
SW		 2188done:
2189 downgrade_write(&osdc->map_sem);
82dcabad
ID		 2190 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2191 osdc->osdmap->epoch);
cd634fb6
SW		 2192
2193 /*
2194 * subscribe to subsequent osdmap updates if full to ensure
2195 * we find out when we are no longer full and stop returning
2196 * ENOSPC.
2197 */
d29adb34
JD		 2198 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2199 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2200 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2201 ceph_monc_request_next_osdmap(&osdc->client->monc);
2202
f9d25199
AE		 2203 mutex_lock(&osdc->request_mutex);
2204 __send_queued(osdc);
2205 mutex_unlock(&osdc->request_mutex);
f24e9980 2206 up_read(&osdc->map_sem);
03066f23 2207 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2208 return;
2209
2210bad:
2211 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2212 ceph_msg_dump(msg);
f24e9980 2213 up_write(&osdc->map_sem);
f24e9980
SW		 2214}
2215
a40c4f10
YS		 2216/*
2217 * watch/notify callback event infrastructure
2218 *
2219 * These callbacks are used both for watch and notify operations.
2220 */
2221static void __release_event(struct kref *kref)
2222{
2223 struct ceph_osd_event *event =
2224 container_of(kref, struct ceph_osd_event, kref);
2225
2226 dout("__release_event %p\n", event);
2227 kfree(event);
2228}
2229
2230static void get_event(struct ceph_osd_event *event)
2231{
2232 kref_get(&event->kref);
2233}
2234
2235void ceph_osdc_put_event(struct ceph_osd_event *event)
2236{
2237 kref_put(&event->kref, __release_event);
2238}
2239EXPORT_SYMBOL(ceph_osdc_put_event);
2240
2241static void __insert_event(struct ceph_osd_client *osdc,
2242 struct ceph_osd_event *new)
2243{
2244 struct rb_node **p = &osdc->event_tree.rb_node;
2245 struct rb_node *parent = NULL;
2246 struct ceph_osd_event *event = NULL;
2247
2248 while (*p) {
2249 parent = *p;
2250 event = rb_entry(parent, struct ceph_osd_event, node);
2251 if (new->cookie < event->cookie)
2252 p = &(*p)->rb_left;
2253 else if (new->cookie > event->cookie)
2254 p = &(*p)->rb_right;
2255 else
2256 BUG();
2257 }
2258
2259 rb_link_node(&new->node, parent, p);
2260 rb_insert_color(&new->node, &osdc->event_tree);
2261}
2262
2263static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2264 u64 cookie)
2265{
2266 struct rb_node **p = &osdc->event_tree.rb_node;
2267 struct rb_node *parent = NULL;
2268 struct ceph_osd_event *event = NULL;
2269
2270 while (*p) {
2271 parent = *p;
2272 event = rb_entry(parent, struct ceph_osd_event, node);
2273 if (cookie < event->cookie)
2274 p = &(*p)->rb_left;
2275 else if (cookie > event->cookie)
2276 p = &(*p)->rb_right;
2277 else
2278 return event;
2279 }
2280 return NULL;
2281}
2282
2283static void __remove_event(struct ceph_osd_event *event)
2284{
2285 struct ceph_osd_client *osdc = event->osdc;
2286
2287 if (!RB_EMPTY_NODE(&event->node)) {
2288 dout("__remove_event removed %p\n", event);
2289 rb_erase(&event->node, &osdc->event_tree);
2290 ceph_osdc_put_event(event);
2291 } else {
2292 dout("__remove_event didn't remove %p\n", event);
2293 }
2294}
2295
2296int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2297 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2298 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2299{
2300 struct ceph_osd_event *event;
2301
2302 event = kmalloc(sizeof(*event), GFP_NOIO);
2303 if (!event)
2304 return -ENOMEM;
2305
2306 dout("create_event %p\n", event);
2307 event->cb = event_cb;
3c663bbd 2308 event->one_shot = 0;
a40c4f10
YS		 2309 event->data = data;
2310 event->osdc = osdc;
2311 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2312 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2313 kref_init(&event->kref); /* one ref for us */
2314 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2315
2316 spin_lock(&osdc->event_lock);
2317 event->cookie = ++osdc->event_count;
2318 __insert_event(osdc, event);
2319 spin_unlock(&osdc->event_lock);
2320
2321 *pevent = event;
2322 return 0;
2323}
2324EXPORT_SYMBOL(ceph_osdc_create_event);
2325
2326void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2327{
2328 struct ceph_osd_client *osdc = event->osdc;
2329
2330 dout("cancel_event %p\n", event);
2331 spin_lock(&osdc->event_lock);
2332 __remove_event(event);
2333 spin_unlock(&osdc->event_lock);
2334 ceph_osdc_put_event(event); /* caller's */
2335}
2336EXPORT_SYMBOL(ceph_osdc_cancel_event);
2337
2338
2339static void do_event_work(struct work_struct *work)
2340{
2341 struct ceph_osd_event_work *event_work =
2342 container_of(work, struct ceph_osd_event_work, work);
2343 struct ceph_osd_event *event = event_work->event;
2344 u64 ver = event_work->ver;
2345 u64 notify_id = event_work->notify_id;
2346 u8 opcode = event_work->opcode;
2347
2348 dout("do_event_work completing %p\n", event);
2349 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2350 dout("do_event_work completed %p\n", event);
2351 ceph_osdc_put_event(event);
2352 kfree(event_work);
2353}
2354
2355
2356/*
2357 * Process osd watch notifications
2358 */
3c663bbd
AE		 2359static void handle_watch_notify(struct ceph_osd_client *osdc,
2360 struct ceph_msg *msg)
a40c4f10
YS		 2361{
2362 void *p, *end;
2363 u8 proto_ver;
2364 u64 cookie, ver, notify_id;
2365 u8 opcode;
2366 struct ceph_osd_event *event;
2367 struct ceph_osd_event_work *event_work;
2368
2369 p = msg->front.iov_base;
2370 end = p + msg->front.iov_len;
2371
2372 ceph_decode_8_safe(&p, end, proto_ver, bad);
2373 ceph_decode_8_safe(&p, end, opcode, bad);
2374 ceph_decode_64_safe(&p, end, cookie, bad);
2375 ceph_decode_64_safe(&p, end, ver, bad);
2376 ceph_decode_64_safe(&p, end, notify_id, bad);
2377
2378 spin_lock(&osdc->event_lock);
2379 event = __find_event(osdc, cookie);
2380 if (event) {
3c663bbd 2381 BUG_ON(event->one_shot);
a40c4f10 2382 get_event(event);
a40c4f10
YS		 2383 }
2384 spin_unlock(&osdc->event_lock);
2385 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2386 cookie, ver, event);
2387 if (event) {
2388 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10 2389 if (!event_work) {
91883cd2
ID		 2390 pr_err("couldn't allocate event_work\n");
2391 ceph_osdc_put_event(event);
2392 return;
a40c4f10 2393 }
6b0ae409 2394 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2395 event_work->event = event;
2396 event_work->ver = ver;
2397 event_work->notify_id = notify_id;
2398 event_work->opcode = opcode;
a40c4f10 2399
91883cd2
ID		 2400 queue_work(osdc->notify_wq, &event_work->work);
2401 }
a40c4f10 2402
a40c4f10
YS		 2403 return;
2404
2405bad:
2406 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 2407}
2408
e65550fd
AE		 2409/*
2410 * build new request AND message
2411 *
2412 */
2413void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2414 struct ceph_snap_context *snapc, u64 snap_id,
2415 struct timespec *mtime)
2416{
2417 struct ceph_msg *msg = req->r_request;
2418 void *p;
2419 size_t msg_size;
2420 int flags = req->r_flags;
2421 u64 data_len;
2422 unsigned int i;
2423
2424 req->r_snapid = snap_id;
2425 req->r_snapc = ceph_get_snap_context(snapc);
2426
2427 /* encode request */
2428 msg->hdr.version = cpu_to_le16(4);
2429
2430 p = msg->front.iov_base;
2431 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2432 req->r_request_osdmap_epoch = p;
2433 p += 4;
2434 req->r_request_flags = p;
2435 p += 4;
2436 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2437 ceph_encode_timespec(p, mtime);
2438 p += sizeof(struct ceph_timespec);
2439 req->r_request_reassert_version = p;
2440 p += sizeof(struct ceph_eversion); /* will get filled in */
2441
2442 /* oloc */
2443 ceph_encode_8(&p, 4);
2444 ceph_encode_8(&p, 4);
2445 ceph_encode_32(&p, 8 + 4 + 4);
2446 req->r_request_pool = p;
2447 p += 8;
2448 ceph_encode_32(&p, -1); /* preferred */
2449 ceph_encode_32(&p, 0); /* key len */
2450
2451 ceph_encode_8(&p, 1);
2452 req->r_request_pgid = p;
2453 p += 8 + 4;
2454 ceph_encode_32(&p, -1); /* preferred */
2455
2456 /* oid */
3c972c95
ID		 2457 ceph_encode_32(&p, req->r_base_oid.name_len);
2458 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2459 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2460 req->r_base_oid.name, req->r_base_oid.name_len);
2461 p += req->r_base_oid.name_len;
e65550fd
AE		 2462
2463 /* ops--can imply data */
2464 ceph_encode_16(&p, (u16)req->r_num_ops);
2465 data_len = 0;
2466 for (i = 0; i < req->r_num_ops; i++) {
2467 data_len += osd_req_encode_op(req, p, i);
2468 p += sizeof(struct ceph_osd_op);
2469 }
2470
2471 /* snaps */
2472 ceph_encode_64(&p, req->r_snapid);
2473 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2474 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2475 if (req->r_snapc) {
2476 for (i = 0; i < snapc->num_snaps; i++) {
2477 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2478 }
2479 }
2480
2481 req->r_request_attempts = p;
2482 p += 4;
2483
2484 /* data */
2485 if (flags & CEPH_OSD_FLAG_WRITE) {
2486 u16 data_off;
2487
2488 /*
2489 * The header "data_off" is a hint to the receiver
2490 * allowing it to align received data into its
2491 * buffers such that there's no need to re-copy
2492 * it before writing it to disk (direct I/O).
2493 */
2494 data_off = (u16) (off & 0xffff);
2495 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2496 }
2497 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2498
2499 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2500 msg_size = p - msg->front.iov_base;
2501 msg->front.iov_len = msg_size;
2502 msg->hdr.front_len = cpu_to_le32(msg_size);
2503
2504 dout("build_request msg_size was %d\n", (int)msg_size);
2505}
2506EXPORT_SYMBOL(ceph_osdc_build_request);
2507
70636773
AE		 2508/*
2509 * Register request, send initial attempt.
2510 */
2511int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2512 struct ceph_osd_request *req,
2513 bool nofail)
2514{
0bbfdfe8 2515 int rc;
70636773 2516
f24e9980
SW		 2517 down_read(&osdc->map_sem);
2518 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2519
2520 rc = __ceph_osdc_start_request(osdc, req, nofail);
2521
f24e9980
SW		 2522 mutex_unlock(&osdc->request_mutex);
2523 up_read(&osdc->map_sem);
0bbfdfe8 2524
f24e9980
SW		 2525 return rc;
2526}
3d14c5d2 2527EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 2528
c9f9b93d
ID		 2529/*
2530 * Unregister a registered request. The request is not completed (i.e.
2531 * no callbacks or wakeups) - higher layers are supposed to know what
2532 * they are canceling.
2533 */
2534void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2535{
2536 struct ceph_osd_client *osdc = req->r_osdc;
2537
2538 mutex_lock(&osdc->request_mutex);
2539 if (req->r_linger)
2540 __unregister_linger_request(osdc, req);
2541 __unregister_request(osdc, req);
2542 mutex_unlock(&osdc->request_mutex);
2543
2544 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2545}
2546EXPORT_SYMBOL(ceph_osdc_cancel_request);
2547
f24e9980
SW		 2548/*
2549 * wait for a request to complete
2550 */
2551int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2552 struct ceph_osd_request *req)
2553{
2554 int rc;
2555
c9f9b93d
ID		 2556 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2557
f24e9980
SW		 2558 rc = wait_for_completion_interruptible(&req->r_completion);
2559 if (rc < 0) {
c9f9b93d
ID		 2560 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2561 ceph_osdc_cancel_request(req);
25845472 2562 complete_request(req);
f24e9980
SW		 2563 return rc;
2564 }
2565
c9f9b93d
ID		 2566 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2567 req->r_result);
f24e9980
SW		 2568 return req->r_result;
2569}
3d14c5d2 2570EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2571
2572/*
2573 * sync - wait for all in-flight requests to flush. avoid starvation.
2574 */
2575void ceph_osdc_sync(struct ceph_osd_client *osdc)
2576{
2577 struct ceph_osd_request *req;
2578 u64 last_tid, next_tid = 0;
2579
2580 mutex_lock(&osdc->request_mutex);
2581 last_tid = osdc->last_tid;
2582 while (1) {
2583 req = __lookup_request_ge(osdc, next_tid);
2584 if (!req)
2585 break;
2586 if (req->r_tid > last_tid)
2587 break;
2588
2589 next_tid = req->r_tid + 1;
2590 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2591 continue;
2592
2593 ceph_osdc_get_request(req);
2594 mutex_unlock(&osdc->request_mutex);
2595 dout("sync waiting on tid %llu (last is %llu)\n",
2596 req->r_tid, last_tid);
2597 wait_for_completion(&req->r_safe_completion);
2598 mutex_lock(&osdc->request_mutex);
2599 ceph_osdc_put_request(req);
2600 }
2601 mutex_unlock(&osdc->request_mutex);
2602 dout("sync done (thru tid %llu)\n", last_tid);
2603}
3d14c5d2 2604EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2605
dd935f44
JD		 2606/*
2607 * Call all pending notify callbacks - for use after a watch is
2608 * unregistered, to make sure no more callbacks for it will be invoked
2609 */
f6479449 2610void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44
JD		 2611{
2612 flush_workqueue(osdc->notify_wq);
2613}
2614EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2615
2616
f24e9980
SW		 2617/*
2618 * init, shutdown
2619 */
2620int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2621{
2622 int err;
2623
2624 dout("init\n");
2625 osdc->client = client;
2626 osdc->osdmap = NULL;
2627 init_rwsem(&osdc->map_sem);
2628 init_completion(&osdc->map_waiters);
2629 osdc->last_requested_map = 0;
2630 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2631 osdc->last_tid = 0;
2632 osdc->osds = RB_ROOT;
f5a2041b 2633 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2634 osdc->requests = RB_ROOT;
422d2cb8 2635 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2636 INIT_LIST_HEAD(&osdc->req_unsent);
2637 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2638 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2639 osdc->num_requests = 0;
2640 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2641 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2642 spin_lock_init(&osdc->event_lock);
2643 osdc->event_tree = RB_ROOT;
2644 osdc->event_count = 0;
f5a2041b
YS		 2645
2646 schedule_delayed_work(&osdc->osds_timeout_work,
a319bf56 2647 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
f24e9980 2648
5f44f142 2649 err = -ENOMEM;
f24e9980
SW		 2650 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2651 sizeof(struct ceph_osd_request));
2652 if (!osdc->req_mempool)
5f44f142 2653 goto out;
f24e9980 2654
d50b409f
SW		 2655 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2656 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2657 "osd_op");
f24e9980 2658 if (err < 0)
5f44f142 2659 goto out_mempool;
d50b409f 2660 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2661 OSD_OPREPLY_FRONT_LEN, 10, true,
2662 "osd_op_reply");
c16e7869
SW		 2663 if (err < 0)
2664 goto out_msgpool;
a40c4f10 2665
dbcae088 2666 err = -ENOMEM;
a40c4f10 2667 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2668 if (!osdc->notify_wq)
c172ec5c
ID		 2669 goto out_msgpool_reply;
2670
f24e9980 2671 return 0;
5f44f142 2672
c172ec5c
ID		 2673out_msgpool_reply:
2674 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2675out_msgpool:
2676 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2677out_mempool:
2678 mempool_destroy(osdc->req_mempool);
2679out:
2680 return err;
f24e9980
SW		 2681}
2682
2683void ceph_osdc_stop(struct ceph_osd_client *osdc)
2684{
a40c4f10
YS		 2685 flush_workqueue(osdc->notify_wq);
2686 destroy_workqueue(osdc->notify_wq);
f24e9980 2687 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2688 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2689 if (osdc->osdmap) {
2690 ceph_osdmap_destroy(osdc->osdmap);
2691 osdc->osdmap = NULL;
2692 }
aca420bc 2693 remove_all_osds(osdc);
f24e9980
SW		 2694 mempool_destroy(osdc->req_mempool);
2695 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2696 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2697}
2698
2699/*
2700 * Read some contiguous pages. If we cross a stripe boundary, shorten
2701 * *plen. Return number of bytes read, or error.
2702 */
2703int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2704 struct ceph_vino vino, struct ceph_file_layout *layout,
2705 u64 off, u64 *plen,
2706 u32 truncate_seq, u64 truncate_size,
b7495fc2 2707 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2708{
2709 struct ceph_osd_request *req;
2710 int rc = 0;
2711
2712 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2713 vino.snap, off, *plen);
715e4cd4 2714 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 2715 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2716 NULL, truncate_seq, truncate_size,
153e5167 2717 false);
6816282d
SW		 2718 if (IS_ERR(req))
2719 return PTR_ERR(req);
f24e9980
SW		 2720
2721 /* it may be a short read due to an object boundary */
0fff87ec 2722
406e2c9f 2723 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2724 pages, *plen, page_align, false, false);
f24e9980 2725
e0c59487 2726 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2727 off, *plen, *plen, page_align);
f24e9980 2728
79528734 2729 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2730
f24e9980
SW		 2731 rc = ceph_osdc_start_request(osdc, req, false);
2732 if (!rc)
2733 rc = ceph_osdc_wait_request(osdc, req);
2734
2735 ceph_osdc_put_request(req);
2736 dout("readpages result %d\n", rc);
2737 return rc;
2738}
3d14c5d2 2739EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2740
2741/*
2742 * do a synchronous write on N pages
2743 */
2744int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2745 struct ceph_file_layout *layout,
2746 struct ceph_snap_context *snapc,
2747 u64 off, u64 len,
2748 u32 truncate_seq, u64 truncate_size,
2749 struct timespec *mtime,
24808826 2750 struct page **pages, int num_pages)
f24e9980
SW		 2751{
2752 struct ceph_osd_request *req;
2753 int rc = 0;
b7495fc2 2754 int page_align = off & ~PAGE_MASK;
f24e9980 2755
acead002 2756 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
715e4cd4 2757 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
f24e9980 2758 CEPH_OSD_OP_WRITE,
24808826 2759 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2760 snapc, truncate_seq, truncate_size,
153e5167 2761 true);
6816282d
SW		 2762 if (IS_ERR(req))
2763 return PTR_ERR(req);
f24e9980
SW		 2764
2765 /* it may be a short write due to an object boundary */
406e2c9f 2766 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2767 false, false);
2768 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2769
79528734 2770 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2771
87f979d3 2772 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2773 if (!rc)
2774 rc = ceph_osdc_wait_request(osdc, req);
2775
2776 ceph_osdc_put_request(req);
2777 if (rc == 0)
2778 rc = len;
2779 dout("writepages result %d\n", rc);
2780 return rc;
2781}
3d14c5d2 2782EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2783
5522ae0b
AE		 2784int ceph_osdc_setup(void)
2785{
2786 BUG_ON(ceph_osd_request_cache);
2787 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2788 sizeof (struct ceph_osd_request),
2789 __alignof__(struct ceph_osd_request),
2790 0, NULL);
2791
2792 return ceph_osd_request_cache ? 0 : -ENOMEM;
2793}
2794EXPORT_SYMBOL(ceph_osdc_setup);
2795
2796void ceph_osdc_cleanup(void)
2797{
2798 BUG_ON(!ceph_osd_request_cache);
2799 kmem_cache_destroy(ceph_osd_request_cache);
2800 ceph_osd_request_cache = NULL;
2801}
2802EXPORT_SYMBOL(ceph_osdc_cleanup);
2803
f24e9980
SW		 2804/*
2805 * handle incoming message
2806 */
2807static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2808{
2809 struct ceph_osd *osd = con->private;
32c895e7 2810 struct ceph_osd_client *osdc;
f24e9980
SW		 2811 int type = le16_to_cpu(msg->hdr.type);
2812
2813 if (!osd)
4a32f93d 2814 goto out;
32c895e7 2815 osdc = osd->o_osdc;
f24e9980
SW		 2816
2817 switch (type) {
2818 case CEPH_MSG_OSD_MAP:
2819 ceph_osdc_handle_map(osdc, msg);
2820 break;
2821 case CEPH_MSG_OSD_OPREPLY:
70cf052d 2822 handle_reply(osdc, msg);
f24e9980 2823 break;
a40c4f10
YS		 2824 case CEPH_MSG_WATCH_NOTIFY:
2825 handle_watch_notify(osdc, msg);
2826 break;
f24e9980
SW		 2827
2828 default:
2829 pr_err("received unknown message type %d %s\n", type,
2830 ceph_msg_type_name(type));
2831 }
4a32f93d 2832out:
f24e9980
SW		 2833 ceph_msg_put(msg);
2834}
2835
5b3a4db3 2836/*
d15f9d69
ID		 2837 * Lookup and return message for incoming reply. Don't try to do
2838 * anything about a larger than preallocated data portion of the
2839 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 2840 */
2841static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2842 struct ceph_msg_header *hdr,
2843 int *skip)
f24e9980
SW		 2844{
2845 struct ceph_osd *osd = con->private;
2846 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2847 struct ceph_msg *m;
0547a9b3 2848 struct ceph_osd_request *req;
3f0a4ac5 2849 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2850 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2851 u64 tid;
f24e9980 2852
0547a9b3
YS		 2853 tid = le64_to_cpu(hdr->tid);
2854 mutex_lock(&osdc->request_mutex);
2855 req = __lookup_request(osdc, tid);
2856 if (!req) {
cd8140c6
ID		 2857 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
2858 osd->o_osd, tid);
0547a9b3 2859 m = NULL;
d15f9d69 2860 *skip = 1;
0547a9b3
YS		 2861 goto out;
2862 }
c16e7869 2863
ace6d3a9 2864 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2865
f2be82b0 2866 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 2867 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
2868 __func__, osd->o_osd, req->r_tid, front_len,
2869 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 2870 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2871 false);
a79832f2 2872 if (!m)
c16e7869
SW		 2873 goto out;
2874 ceph_msg_put(req->r_reply);
2875 req->r_reply = m;
2876 }
0fff87ec 2877
d15f9d69
ID		 2878 if (data_len > req->r_reply->data_length) {
2879 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
2880 __func__, osd->o_osd, req->r_tid, data_len,
2881 req->r_reply->data_length);
2882 m = NULL;
2883 *skip = 1;
2884 goto out;
0547a9b3 2885 }
d15f9d69
ID		 2886
2887 m = ceph_msg_get(req->r_reply);
c16e7869 2888 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2889
2890out:
2891 mutex_unlock(&osdc->request_mutex);
2450418c 2892 return m;
5b3a4db3
SW		 2893}
2894
2895static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2896 struct ceph_msg_header *hdr,
2897 int *skip)
2898{
2899 struct ceph_osd *osd = con->private;
2900 int type = le16_to_cpu(hdr->type);
2901 int front = le32_to_cpu(hdr->front_len);
2902
1c20f2d2 2903 *skip = 0;
5b3a4db3
SW		 2904 switch (type) {
2905 case CEPH_MSG_OSD_MAP:
a40c4f10 2906 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2907 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2908 case CEPH_MSG_OSD_OPREPLY:
2909 return get_reply(con, hdr, skip);
2910 default:
2911 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2912 osd->o_osd);
2913 *skip = 1;
2914 return NULL;
2915 }
f24e9980
SW		 2916}
2917
2918/*
2919 * Wrappers to refcount containing ceph_osd struct
2920 */
2921static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2922{
2923 struct ceph_osd *osd = con->private;
2924 if (get_osd(osd))
2925 return con;
2926 return NULL;
2927}
2928
2929static void put_osd_con(struct ceph_connection *con)
2930{
2931 struct ceph_osd *osd = con->private;
2932 put_osd(osd);
2933}
2934
4e7a5dcd
SW		 2935/*
2936 * authentication
2937 */
a3530df3
AE		 2938/*
2939 * Note: returned pointer is the address of a structure that's
2940 * managed separately. Caller must *not* attempt to free it.
2941 */
2942static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2943 int *proto, int force_new)
4e7a5dcd
SW		 2944{
2945 struct ceph_osd *o = con->private;
2946 struct ceph_osd_client *osdc = o->o_osdc;
2947 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2948 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2949
74f1869f 2950 if (force_new && auth->authorizer) {
27859f97 2951 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2952 auth->authorizer = NULL;
2953 }
27859f97
SW		 2954 if (!auth->authorizer) {
2955 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2956 auth);
4e7a5dcd 2957 if (ret)
a3530df3 2958 return ERR_PTR(ret);
27859f97
SW		 2959 } else {
2960 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2961 auth);
2962 if (ret)
2963 return ERR_PTR(ret);
4e7a5dcd 2964 }
4e7a5dcd 2965 *proto = ac->protocol;
74f1869f 2966
a3530df3 2967 return auth;
4e7a5dcd
SW		 2968}
2969
2970
2971static int verify_authorizer_reply(struct ceph_connection *con, int len)
2972{
2973 struct ceph_osd *o = con->private;
2974 struct ceph_osd_client *osdc = o->o_osdc;
2975 struct ceph_auth_client *ac = osdc->client->monc.auth;
2976
27859f97 2977 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2978}
2979
9bd2e6f8
SW		 2980static int invalidate_authorizer(struct ceph_connection *con)
2981{
2982 struct ceph_osd *o = con->private;
2983 struct ceph_osd_client *osdc = o->o_osdc;
2984 struct ceph_auth_client *ac = osdc->client->monc.auth;
2985
27859f97 2986 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2987 return ceph_monc_validate_auth(&osdc->client->monc);
2988}
4e7a5dcd 2989
79dbd1ba 2990static int osd_sign_message(struct ceph_msg *msg)
33d07337 2991{
79dbd1ba 2992 struct ceph_osd *o = msg->con->private;
33d07337 2993 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 2994
33d07337
YZ		 2995 return ceph_auth_sign_message(auth, msg);
2996}
2997
79dbd1ba 2998static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 2999{
79dbd1ba 3000 struct ceph_osd *o = msg->con->private;
33d07337 3001 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 3002
33d07337
YZ		 3003 return ceph_auth_check_message_signature(auth, msg);
3004}
3005
9e32789f 3006static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 3007 .get = get_osd_con,
3008 .put = put_osd_con,
3009 .dispatch = dispatch,
4e7a5dcd
SW		 3010 .get_authorizer = get_authorizer,
3011 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 3012 .invalidate_authorizer = invalidate_authorizer,
f24e9980 3013 .alloc_msg = alloc_msg,
79dbd1ba
ID		 3014 .sign_message = osd_sign_message,
3015 .check_message_signature = osd_check_message_signature,
81b024e7 3016 .fault = osd_reset,
f24e9980 3017};
Linux 6.x block layer and io_uring tree(s)