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rbd: set max_sectors explicitly
[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
863c7eb5
AE		 123#define osd_req_op_data(oreq, whch, typ, fld) \
124 ({ \
125 BUG_ON(whch >= (oreq)->r_num_ops); \
126 &(oreq)->r_ops[whch].typ.fld; \
127 })
128
49719778
AE		 129static struct ceph_osd_data *
130osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
131{
132 BUG_ON(which >= osd_req->r_num_ops);
133
134 return &osd_req->r_ops[which].raw_data_in;
135}
136
a4ce40a9
AE		 137struct ceph_osd_data *
138osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 139 unsigned int which)
a4ce40a9 140{
863c7eb5 141 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 142}
143EXPORT_SYMBOL(osd_req_op_extent_osd_data);
144
a4ce40a9
AE		 145struct ceph_osd_data *
146osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
147 unsigned int which)
148{
863c7eb5 149 return osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 150}
151EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
152
49719778
AE		 153void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
154 unsigned int which, struct page **pages,
155 u64 length, u32 alignment,
156 bool pages_from_pool, bool own_pages)
157{
158 struct ceph_osd_data *osd_data;
159
160 osd_data = osd_req_op_raw_data_in(osd_req, which);
161 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
162 pages_from_pool, own_pages);
163}
164EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
165
a4ce40a9 166void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 167 unsigned int which, struct page **pages,
168 u64 length, u32 alignment,
a4ce40a9
AE		 169 bool pages_from_pool, bool own_pages)
170{
171 struct ceph_osd_data *osd_data;
172
863c7eb5 173 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 174 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
175 pages_from_pool, own_pages);
a4ce40a9
AE		 176}
177EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
178
179void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 180 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 181{
182 struct ceph_osd_data *osd_data;
183
863c7eb5 184 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 185 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 186}
187EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
188
189#ifdef CONFIG_BLOCK
190void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 191 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 192{
193 struct ceph_osd_data *osd_data;
863c7eb5
AE		 194
195 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 196 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 197}
198EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
199#endif /* CONFIG_BLOCK */
200
201static void osd_req_op_cls_request_info_pagelist(
202 struct ceph_osd_request *osd_req,
203 unsigned int which, struct ceph_pagelist *pagelist)
204{
205 struct ceph_osd_data *osd_data;
206
863c7eb5 207 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 208 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 209}
210
04017e29
AE		 211void osd_req_op_cls_request_data_pagelist(
212 struct ceph_osd_request *osd_req,
213 unsigned int which, struct ceph_pagelist *pagelist)
214{
215 struct ceph_osd_data *osd_data;
216
863c7eb5 217 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29
AE		 218 ceph_osd_data_pagelist_init(osd_data, pagelist);
219}
220EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
221
6c57b554
AE		 222void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
223 unsigned int which, struct page **pages, u64 length,
224 u32 alignment, bool pages_from_pool, bool own_pages)
225{
226 struct ceph_osd_data *osd_data;
227
228 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
229 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
230 pages_from_pool, own_pages);
231}
232EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
233
a4ce40a9
AE		 234void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
235 unsigned int which, struct page **pages, u64 length,
236 u32 alignment, bool pages_from_pool, bool own_pages)
237{
238 struct ceph_osd_data *osd_data;
239
863c7eb5 240 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 241 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
242 pages_from_pool, own_pages);
a4ce40a9
AE		 243}
244EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
245
23c08a9c
AE		 246static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
247{
248 switch (osd_data->type) {
249 case CEPH_OSD_DATA_TYPE_NONE:
250 return 0;
251 case CEPH_OSD_DATA_TYPE_PAGES:
252 return osd_data->length;
253 case CEPH_OSD_DATA_TYPE_PAGELIST:
254 return (u64)osd_data->pagelist->length;
255#ifdef CONFIG_BLOCK
256 case CEPH_OSD_DATA_TYPE_BIO:
257 return (u64)osd_data->bio_length;
258#endif /* CONFIG_BLOCK */
259 default:
260 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
261 return 0;
262 }
263}
264
c54d47bf
AE		 265static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
266{
5476492f 267 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 268 int num_pages;
269
270 num_pages = calc_pages_for((u64)osd_data->alignment,
271 (u64)osd_data->length);
272 ceph_release_page_vector(osd_data->pages, num_pages);
273 }
5476492f
AE		 274 ceph_osd_data_init(osd_data);
275}
276
277static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
278 unsigned int which)
279{
280 struct ceph_osd_req_op *op;
281
282 BUG_ON(which >= osd_req->r_num_ops);
283 op = &osd_req->r_ops[which];
284
285 switch (op->op) {
286 case CEPH_OSD_OP_READ:
287 case CEPH_OSD_OP_WRITE:
288 ceph_osd_data_release(&op->extent.osd_data);
289 break;
290 case CEPH_OSD_OP_CALL:
291 ceph_osd_data_release(&op->cls.request_info);
04017e29 292 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 293 ceph_osd_data_release(&op->cls.response_data);
294 break;
d74b50be
YZ		 295 case CEPH_OSD_OP_SETXATTR:
296 case CEPH_OSD_OP_CMPXATTR:
297 ceph_osd_data_release(&op->xattr.osd_data);
298 break;
66ba609f
YZ		 299 case CEPH_OSD_OP_STAT:
300 ceph_osd_data_release(&op->raw_data_in);
301 break;
5476492f
AE		 302 default:
303 break;
304 }
c54d47bf
AE		 305}
306
f24e9980
SW		 307/*
308 * requests
309 */
9e94af20 310static void ceph_osdc_release_request(struct kref *kref)
f24e9980 311{
9e94af20
ID		 312 struct ceph_osd_request *req = container_of(kref,
313 struct ceph_osd_request, r_kref);
5476492f 314 unsigned int which;
415e49a9 315
9e94af20
ID		 316 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
317 req->r_request, req->r_reply);
6562d661
ID		 318 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
319 WARN_ON(!list_empty(&req->r_req_lru_item));
320 WARN_ON(!list_empty(&req->r_osd_item));
321 WARN_ON(!list_empty(&req->r_linger_item));
322 WARN_ON(!list_empty(&req->r_linger_osd_item));
323 WARN_ON(req->r_osd);
9e94af20 324
415e49a9
SW		 325 if (req->r_request)
326 ceph_msg_put(req->r_request);
ace6d3a9 327 if (req->r_reply) {
8921d114 328 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 329 ceph_msg_put(req->r_reply);
ace6d3a9 330 }
0fff87ec 331
5476492f
AE		 332 for (which = 0; which < req->r_num_ops; which++)
333 osd_req_op_data_release(req, which);
0fff87ec 334
415e49a9
SW		 335 ceph_put_snap_context(req->r_snapc);
336 if (req->r_mempool)
337 mempool_free(req, req->r_osdc->req_mempool);
338 else
5522ae0b
AE		 339 kmem_cache_free(ceph_osd_request_cache, req);
340
f24e9980 341}
9e94af20
ID		 342
343void ceph_osdc_get_request(struct ceph_osd_request *req)
344{
345 dout("%s %p (was %d)\n", __func__, req,
346 atomic_read(&req->r_kref.refcount));
347 kref_get(&req->r_kref);
348}
349EXPORT_SYMBOL(ceph_osdc_get_request);
350
351void ceph_osdc_put_request(struct ceph_osd_request *req)
352{
353 dout("%s %p (was %d)\n", __func__, req,
354 atomic_read(&req->r_kref.refcount));
355 kref_put(&req->r_kref, ceph_osdc_release_request);
356}
357EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 358
3499e8a5 359struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 360 struct ceph_snap_context *snapc,
1b83bef2 361 unsigned int num_ops,
3499e8a5 362 bool use_mempool,
54a54007 363 gfp_t gfp_flags)
f24e9980
SW		 364{
365 struct ceph_osd_request *req;
366 struct ceph_msg *msg;
1b83bef2
SW		 367 size_t msg_size;
368
79528734
AE		 369 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
370 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
371
1b83bef2
SW		 372 msg_size = 4 + 4 + 8 + 8 + 4+8;
373 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
374 msg_size += 1 + 8 + 4 + 4; /* pg_t */
2d0ebc5d 375 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
1b83bef2
SW		 376 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
377 msg_size += 8; /* snapid */
378 msg_size += 8; /* snap_seq */
379 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
380 msg_size += 4;
f24e9980
SW		 381
382 if (use_mempool) {
3499e8a5 383 req = mempool_alloc(osdc->req_mempool, gfp_flags);
f24e9980
SW		 384 memset(req, 0, sizeof(*req));
385 } else {
5522ae0b 386 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
f24e9980
SW		 387 }
388 if (req == NULL)
a79832f2 389 return NULL;
f24e9980 390
f24e9980
SW		 391 req->r_osdc = osdc;
392 req->r_mempool = use_mempool;
79528734 393 req->r_num_ops = num_ops;
68b4476b 394
415e49a9 395 kref_init(&req->r_kref);
f24e9980
SW		 396 init_completion(&req->r_completion);
397 init_completion(&req->r_safe_completion);
a978fa20 398 RB_CLEAR_NODE(&req->r_node);
f24e9980 399 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 400 INIT_LIST_HEAD(&req->r_linger_item);
1d0326b1 401 INIT_LIST_HEAD(&req->r_linger_osd_item);
935b639a 402 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 403 INIT_LIST_HEAD(&req->r_osd_item);
404
3c972c95 405 req->r_base_oloc.pool = -1;
205ee118 406 req->r_target_oloc.pool = -1;
22116525 407
c16e7869
SW		 408 /* create reply message */
409 if (use_mempool)
410 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
411 else
412 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
b61c2763 413 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
a79832f2 414 if (!msg) {
c16e7869 415 ceph_osdc_put_request(req);
a79832f2 416 return NULL;
c16e7869
SW		 417 }
418 req->r_reply = msg;
419
420 /* create request message; allow space for oid */
f24e9980 421 if (use_mempool)
8f3bc053 422 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 423 else
b61c2763 424 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
a79832f2 425 if (!msg) {
f24e9980 426 ceph_osdc_put_request(req);
a79832f2 427 return NULL;
f24e9980 428 }
68b4476b 429
f24e9980 430 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5
YS		 431
432 req->r_request = msg;
3499e8a5
YS		 433
434 return req;
435}
3d14c5d2 436EXPORT_SYMBOL(ceph_osdc_alloc_request);
3499e8a5 437
a8dd0a37 438static bool osd_req_opcode_valid(u16 opcode)
68b4476b 439{
a8dd0a37 440 switch (opcode) {
70b5bfa3
ID		 441#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
442__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
443#undef GENERATE_CASE
a8dd0a37
AE		 444 default:
445 return false;
446 }
447}
448
33803f33
AE		 449/*
450 * This is an osd op init function for opcodes that have no data or
451 * other information associated with them. It also serves as a
452 * common init routine for all the other init functions, below.
453 */
c99d2d4a 454static struct ceph_osd_req_op *
49719778 455_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 456 u16 opcode, u32 flags)
33803f33 457{
c99d2d4a
AE		 458 struct ceph_osd_req_op *op;
459
460 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 461 BUG_ON(!osd_req_opcode_valid(opcode));
462
c99d2d4a 463 op = &osd_req->r_ops[which];
33803f33 464 memset(op, 0, sizeof (*op));
33803f33 465 op->op = opcode;
144cba14 466 op->flags = flags;
c99d2d4a
AE		 467
468 return op;
33803f33
AE		 469}
470
49719778 471void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 472 unsigned int which, u16 opcode, u32 flags)
49719778 473{
144cba14 474 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 475}
476EXPORT_SYMBOL(osd_req_op_init);
477
c99d2d4a
AE		 478void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
479 unsigned int which, u16 opcode,
33803f33
AE		 480 u64 offset, u64 length,
481 u64 truncate_size, u32 truncate_seq)
482{
144cba14
YZ		 483 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
484 opcode, 0);
33803f33
AE		 485 size_t payload_len = 0;
486
ad7a60de 487 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197 488 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 489
33803f33
AE		 490 op->extent.offset = offset;
491 op->extent.length = length;
492 op->extent.truncate_size = truncate_size;
493 op->extent.truncate_seq = truncate_seq;
494 if (opcode == CEPH_OSD_OP_WRITE)
495 payload_len += length;
496
497 op->payload_len = payload_len;
498}
499EXPORT_SYMBOL(osd_req_op_extent_init);
500
c99d2d4a
AE		 501void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
502 unsigned int which, u64 length)
e5975c7c 503{
c99d2d4a
AE		 504 struct ceph_osd_req_op *op;
505 u64 previous;
506
507 BUG_ON(which >= osd_req->r_num_ops);
508 op = &osd_req->r_ops[which];
509 previous = op->extent.length;
e5975c7c
AE		 510
511 if (length == previous)
512 return; /* Nothing to do */
513 BUG_ON(length > previous);
514
515 op->extent.length = length;
516 op->payload_len -= previous - length;
517}
518EXPORT_SYMBOL(osd_req_op_extent_update);
519
c99d2d4a 520void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 521 u16 opcode, const char *class, const char *method)
33803f33 522{
144cba14
YZ		 523 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
524 opcode, 0);
5f562df5 525 struct ceph_pagelist *pagelist;
33803f33
AE		 526 size_t payload_len = 0;
527 size_t size;
528
529 BUG_ON(opcode != CEPH_OSD_OP_CALL);
530
5f562df5
AE		 531 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
532 BUG_ON(!pagelist);
533 ceph_pagelist_init(pagelist);
534
33803f33
AE		 535 op->cls.class_name = class;
536 size = strlen(class);
537 BUG_ON(size > (size_t) U8_MAX);
538 op->cls.class_len = size;
5f562df5 539 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 540 payload_len += size;
541
542 op->cls.method_name = method;
543 size = strlen(method);
544 BUG_ON(size > (size_t) U8_MAX);
545 op->cls.method_len = size;
5f562df5 546 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 547 payload_len += size;
548
a4ce40a9 549 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 550
33803f33
AE		 551 op->cls.argc = 0; /* currently unused */
552
553 op->payload_len = payload_len;
554}
555EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 556
d74b50be
YZ		 557int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
558 u16 opcode, const char *name, const void *value,
559 size_t size, u8 cmp_op, u8 cmp_mode)
560{
144cba14
YZ		 561 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
562 opcode, 0);
d74b50be
YZ		 563 struct ceph_pagelist *pagelist;
564 size_t payload_len;
565
566 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
567
568 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
569 if (!pagelist)
570 return -ENOMEM;
571
572 ceph_pagelist_init(pagelist);
573
574 payload_len = strlen(name);
575 op->xattr.name_len = payload_len;
576 ceph_pagelist_append(pagelist, name, payload_len);
577
578 op->xattr.value_len = size;
579 ceph_pagelist_append(pagelist, value, size);
580 payload_len += size;
581
582 op->xattr.cmp_op = cmp_op;
583 op->xattr.cmp_mode = cmp_mode;
584
585 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
586 op->payload_len = payload_len;
587 return 0;
588}
589EXPORT_SYMBOL(osd_req_op_xattr_init);
590
c99d2d4a
AE		 591void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
592 unsigned int which, u16 opcode,
33803f33
AE		 593 u64 cookie, u64 version, int flag)
594{
144cba14
YZ		 595 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
596 opcode, 0);
33803f33 597
c99d2d4a 598 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 599
600 op->watch.cookie = cookie;
9ef1ee5a 601 op->watch.ver = version;
33803f33 602 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 603 op->watch.flag = (u8)1;
33803f33
AE		 604}
605EXPORT_SYMBOL(osd_req_op_watch_init);
606
c647b8a8
ID		 607void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
608 unsigned int which,
609 u64 expected_object_size,
610 u64 expected_write_size)
611{
612 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 613 CEPH_OSD_OP_SETALLOCHINT,
614 0);
c647b8a8
ID		 615
616 op->alloc_hint.expected_object_size = expected_object_size;
617 op->alloc_hint.expected_write_size = expected_write_size;
618
619 /*
620 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
621 * not worth a feature bit. Set FAILOK per-op flag to make
622 * sure older osds don't trip over an unsupported opcode.
623 */
624 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
625}
626EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
627
90af3602 628static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 629 struct ceph_osd_data *osd_data)
630{
631 u64 length = ceph_osd_data_length(osd_data);
632
633 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
634 BUG_ON(length > (u64) SIZE_MAX);
635 if (length)
90af3602 636 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 637 length, osd_data->alignment);
638 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
639 BUG_ON(!length);
90af3602 640 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 641#ifdef CONFIG_BLOCK
642 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 643 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 644#endif
645 } else {
646 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
647 }
648}
649
a8dd0a37 650static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 651 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 652{
79528734 653 struct ceph_osd_req_op *src;
04017e29 654 struct ceph_osd_data *osd_data;
54d50649 655 u64 request_data_len = 0;
04017e29 656 u64 data_length;
a8dd0a37 657
79528734
AE		 658 BUG_ON(which >= req->r_num_ops);
659 src = &req->r_ops[which];
a8dd0a37
AE		 660 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
661 pr_err("unrecognized osd opcode %d\n", src->op);
662
663 return 0;
664 }
665
666 switch (src->op) {
667 case CEPH_OSD_OP_STAT:
49719778
AE		 668 osd_data = &src->raw_data_in;
669 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 670 break;
671 case CEPH_OSD_OP_READ:
672 case CEPH_OSD_OP_WRITE:
ad7a60de 673 case CEPH_OSD_OP_ZERO:
ad7a60de 674 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37 675 if (src->op == CEPH_OSD_OP_WRITE)
54d50649 676 request_data_len = src->extent.length;
a8dd0a37
AE		 677 dst->extent.offset = cpu_to_le64(src->extent.offset);
678 dst->extent.length = cpu_to_le64(src->extent.length);
679 dst->extent.truncate_size =
680 cpu_to_le64(src->extent.truncate_size);
681 dst->extent.truncate_seq =
682 cpu_to_le32(src->extent.truncate_seq);
04017e29 683 osd_data = &src->extent.osd_data;
5476492f 684 if (src->op == CEPH_OSD_OP_WRITE)
04017e29 685 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 686 else
04017e29 687 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 688 break;
689 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 690 dst->cls.class_len = src->cls.class_len;
691 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 692 osd_data = &src->cls.request_info;
693 ceph_osdc_msg_data_add(req->r_request, osd_data);
694 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
695 request_data_len = osd_data->pagelist->length;
696
697 osd_data = &src->cls.request_data;
698 data_length = ceph_osd_data_length(osd_data);
699 if (data_length) {
700 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
701 dst->cls.indata_len = cpu_to_le32(data_length);
702 ceph_osdc_msg_data_add(req->r_request, osd_data);
703 src->payload_len += data_length;
704 request_data_len += data_length;
705 }
706 osd_data = &src->cls.response_data;
707 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 708 break;
709 case CEPH_OSD_OP_STARTSYNC:
710 break;
711 case CEPH_OSD_OP_NOTIFY_ACK:
712 case CEPH_OSD_OP_WATCH:
713 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
714 dst->watch.ver = cpu_to_le64(src->watch.ver);
715 dst->watch.flag = src->watch.flag;
716 break;
c647b8a8
ID		 717 case CEPH_OSD_OP_SETALLOCHINT:
718 dst->alloc_hint.expected_object_size =
719 cpu_to_le64(src->alloc_hint.expected_object_size);
720 dst->alloc_hint.expected_write_size =
721 cpu_to_le64(src->alloc_hint.expected_write_size);
722 break;
d74b50be
YZ		 723 case CEPH_OSD_OP_SETXATTR:
724 case CEPH_OSD_OP_CMPXATTR:
725 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
726 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
727 dst->xattr.cmp_op = src->xattr.cmp_op;
728 dst->xattr.cmp_mode = src->xattr.cmp_mode;
729 osd_data = &src->xattr.osd_data;
730 ceph_osdc_msg_data_add(req->r_request, osd_data);
731 request_data_len = osd_data->pagelist->length;
732 break;
864e9197
YZ		 733 case CEPH_OSD_OP_CREATE:
734 case CEPH_OSD_OP_DELETE:
735 break;
a8dd0a37 736 default:
4c46459c 737 pr_err("unsupported osd opcode %s\n",
8f63ca2d 738 ceph_osd_op_name(src->op));
4c46459c 739 WARN_ON(1);
a8dd0a37
AE		 740
741 return 0;
68b4476b 742 }
7b25bf5f 743
a8dd0a37 744 dst->op = cpu_to_le16(src->op);
7b25bf5f 745 dst->flags = cpu_to_le32(src->flags);
68b4476b 746 dst->payload_len = cpu_to_le32(src->payload_len);
175face2 747
54d50649 748 return request_data_len;
68b4476b
YS		 749}
750
3499e8a5
YS		 751/*
752 * build new request AND message, calculate layout, and adjust file
753 * extent as needed.
754 *
755 * if the file was recently truncated, we include information about its
756 * old and new size so that the object can be updated appropriately. (we
757 * avoid synchronously deleting truncated objects because it's slow.)
758 *
759 * if @do_sync, include a 'startsync' command so that the osd will flush
760 * data quickly.
761 */
762struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
763 struct ceph_file_layout *layout,
764 struct ceph_vino vino,
715e4cd4
YZ		 765 u64 off, u64 *plen,
766 unsigned int which, int num_ops,
3499e8a5
YS		 767 int opcode, int flags,
768 struct ceph_snap_context *snapc,
3499e8a5
YS		 769 u32 truncate_seq,
770 u64 truncate_size,
153e5167 771 bool use_mempool)
3499e8a5 772{
68b4476b 773 struct ceph_osd_request *req;
75d1c941
AE		 774 u64 objnum = 0;
775 u64 objoff = 0;
776 u64 objlen = 0;
6816282d 777 int r;
68b4476b 778
ad7a60de 779 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 780 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
781 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 782
acead002 783 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 784 GFP_NOFS);
4ad12621 785 if (!req)
6816282d 786 return ERR_PTR(-ENOMEM);
79528734 787
d178a9e7 788 req->r_flags = flags;
3499e8a5
YS		 789
790 /* calculate max write size */
a19dadfb 791 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 792 if (r < 0) {
793 ceph_osdc_put_request(req);
6816282d 794 return ERR_PTR(r);
3ff5f385 795 }
a19dadfb 796
864e9197 797 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 798 osd_req_op_init(req, which, opcode, 0);
864e9197
YZ		 799 } else {
800 u32 object_size = le32_to_cpu(layout->fl_object_size);
801 u32 object_base = off - objoff;
802 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
803 if (truncate_size <= object_base) {
804 truncate_size = 0;
805 } else {
806 truncate_size -= object_base;
807 if (truncate_size > object_size)
808 truncate_size = object_size;
809 }
ccca4e37 810 }
715e4cd4 811 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 812 truncate_size, truncate_seq);
813 }
d18d1e28 814
3c972c95 815 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
3499e8a5 816
3c972c95 817 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
4295f221 818 "%llx.%08llx", vino.ino, objnum);
3c972c95 819 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
dbe0fc41 820
f24e9980
SW		 821 return req;
822}
3d14c5d2 823EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 824
825/*
826 * We keep osd requests in an rbtree, sorted by ->r_tid.
827 */
828static void __insert_request(struct ceph_osd_client *osdc,
829 struct ceph_osd_request *new)
830{
831 struct rb_node **p = &osdc->requests.rb_node;
832 struct rb_node *parent = NULL;
833 struct ceph_osd_request *req = NULL;
834
835 while (*p) {
836 parent = *p;
837 req = rb_entry(parent, struct ceph_osd_request, r_node);
838 if (new->r_tid < req->r_tid)
839 p = &(*p)->rb_left;
840 else if (new->r_tid > req->r_tid)
841 p = &(*p)->rb_right;
842 else
843 BUG();
844 }
845
846 rb_link_node(&new->r_node, parent, p);
847 rb_insert_color(&new->r_node, &osdc->requests);
848}
849
850static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
851 u64 tid)
852{
853 struct ceph_osd_request *req;
854 struct rb_node *n = osdc->requests.rb_node;
855
856 while (n) {
857 req = rb_entry(n, struct ceph_osd_request, r_node);
858 if (tid < req->r_tid)
859 n = n->rb_left;
860 else if (tid > req->r_tid)
861 n = n->rb_right;
862 else
863 return req;
864 }
865 return NULL;
866}
867
868static struct ceph_osd_request *
869__lookup_request_ge(struct ceph_osd_client *osdc,
870 u64 tid)
871{
872 struct ceph_osd_request *req;
873 struct rb_node *n = osdc->requests.rb_node;
874
875 while (n) {
876 req = rb_entry(n, struct ceph_osd_request, r_node);
877 if (tid < req->r_tid) {
878 if (!n->rb_left)
879 return req;
880 n = n->rb_left;
881 } else if (tid > req->r_tid) {
882 n = n->rb_right;
883 } else {
884 return req;
885 }
886 }
887 return NULL;
888}
889
2cc6128a
ID		 890static void __kick_linger_request(struct ceph_osd_request *req)
891{
892 struct ceph_osd_client *osdc = req->r_osdc;
893 struct ceph_osd *osd = req->r_osd;
894
895 /*
896 * Linger requests need to be resent with a new tid to avoid
897 * the dup op detection logic on the OSDs. Achieve this with
898 * a re-register dance instead of open-coding.
899 */
900 ceph_osdc_get_request(req);
901 if (!list_empty(&req->r_linger_item))
902 __unregister_linger_request(osdc, req);
903 else
904 __unregister_request(osdc, req);
905 __register_request(osdc, req);
906 ceph_osdc_put_request(req);
907
908 /*
909 * Unless request has been registered as both normal and
910 * lingering, __unregister{,_linger}_request clears r_osd.
911 * However, here we need to preserve r_osd to make sure we
912 * requeue on the same OSD.
913 */
914 WARN_ON(req->r_osd || !osd);
915 req->r_osd = osd;
916
917 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
918 __enqueue_request(req);
919}
920
6f6c7006
SW		 921/*
922 * Resubmit requests pending on the given osd.
923 */
924static void __kick_osd_requests(struct ceph_osd_client *osdc,
925 struct ceph_osd *osd)
926{
a40c4f10 927 struct ceph_osd_request *req, *nreq;
e02493c0 928 LIST_HEAD(resend);
2cc6128a 929 LIST_HEAD(resend_linger);
6f6c7006
SW		 930 int err;
931
2cc6128a 932 dout("%s osd%d\n", __func__, osd->o_osd);
6f6c7006 933 err = __reset_osd(osdc, osd);
685a7555 934 if (err)
6f6c7006 935 return;
2cc6128a 936
e02493c0
AE		 937 /*
938 * Build up a list of requests to resend by traversing the
939 * osd's list of requests. Requests for a given object are
940 * sent in tid order, and that is also the order they're
941 * kept on this list. Therefore all requests that are in
942 * flight will be found first, followed by all requests that
943 * have not yet been sent. And to resend requests while
944 * preserving this order we will want to put any sent
945 * requests back on the front of the osd client's unsent
946 * list.
947 *
948 * So we build a separate ordered list of already-sent
949 * requests for the affected osd and splice it onto the
950 * front of the osd client's unsent list. Once we've seen a
951 * request that has not yet been sent we're done. Those
952 * requests are already sitting right where they belong.
953 */
6f6c7006 954 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 955 if (!req->r_sent)
956 break;
2cc6128a
ID		 957
958 if (!req->r_linger) {
959 dout("%s requeueing %p tid %llu\n", __func__, req,
960 req->r_tid);
961 list_move_tail(&req->r_req_lru_item, &resend);
a40c4f10 962 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2cc6128a
ID		 963 } else {
964 list_move_tail(&req->r_req_lru_item, &resend_linger);
965 }
a40c4f10 966 }
e02493c0 967 list_splice(&resend, &osdc->req_unsent);
a40c4f10 968
e02493c0 969 /*
2cc6128a
ID		 970 * Both registered and not yet registered linger requests are
971 * enqueued with a new tid on the same OSD. We add/move them
972 * to req_unsent/o_requests at the end to keep things in tid
973 * order.
e02493c0 974 */
a40c4f10 975 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1d0326b1 976 r_linger_osd_item) {
2cc6128a
ID		 977 WARN_ON(!list_empty(&req->r_req_lru_item));
978 __kick_linger_request(req);
6f6c7006 979 }
2cc6128a
ID		 980
981 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
982 __kick_linger_request(req);
6f6c7006
SW		 983}
984
f24e9980 985/*
81b024e7 986 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 987 */
988static void osd_reset(struct ceph_connection *con)
989{
990 struct ceph_osd *osd = con->private;
991 struct ceph_osd_client *osdc;
992
993 if (!osd)
994 return;
995 dout("osd_reset osd%d\n", osd->o_osd);
996 osdc = osd->o_osdc;
f24e9980 997 down_read(&osdc->map_sem);
83aff95e
SW		 998 mutex_lock(&osdc->request_mutex);
999 __kick_osd_requests(osdc, osd);
f9d25199 1000 __send_queued(osdc);
83aff95e 1001 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1002 up_read(&osdc->map_sem);
1003}
1004
1005/*
1006 * Track open sessions with osds.
1007 */
e10006f8 1008static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1009{
1010 struct ceph_osd *osd;
1011
1012 osd = kzalloc(sizeof(*osd), GFP_NOFS);
1013 if (!osd)
1014 return NULL;
1015
1016 atomic_set(&osd->o_ref, 1);
1017 osd->o_osdc = osdc;
e10006f8 1018 osd->o_osd = onum;
f407731d 1019 RB_CLEAR_NODE(&osd->o_node);
f24e9980 1020 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 1021 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 1022 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 1023 osd->o_incarnation = 1;
1024
b7a9e5dd 1025 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1026
422d2cb8 1027 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 1028 return osd;
1029}
1030
1031static struct ceph_osd *get_osd(struct ceph_osd *osd)
1032{
1033 if (atomic_inc_not_zero(&osd->o_ref)) {
1034 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1035 atomic_read(&osd->o_ref));
1036 return osd;
1037 } else {
1038 dout("get_osd %p FAIL\n", osd);
1039 return NULL;
1040 }
1041}
1042
1043static void put_osd(struct ceph_osd *osd)
1044{
1045 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1046 atomic_read(&osd->o_ref) - 1);
b28ec2f3 1047 if (atomic_dec_and_test(&osd->o_ref)) {
79494d1b
SW		 1048 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
1049
b28ec2f3
ID		 1050 if (osd->o_auth.authorizer)
1051 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 1052 kfree(osd);
79494d1b 1053 }
f24e9980
SW		 1054}
1055
1056/*
1057 * remove an osd from our map
1058 */
f5a2041b 1059static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1060{
7eb71e03 1061 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
cc9f1f51
ID		 1062 WARN_ON(!list_empty(&osd->o_requests));
1063 WARN_ON(!list_empty(&osd->o_linger_requests));
7c6e6fc5 1064
f5a2041b 1065 list_del_init(&osd->o_osd_lru);
7eb71e03
ID		 1066 rb_erase(&osd->o_node, &osdc->osds);
1067 RB_CLEAR_NODE(&osd->o_node);
1068}
1069
1070static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1071{
1072 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1073
1074 if (!RB_EMPTY_NODE(&osd->o_node)) {
1075 ceph_con_close(&osd->o_con);
1076 __remove_osd(osdc, osd);
1077 put_osd(osd);
1078 }
f24e9980
SW		 1079}
1080
aca420bc
SW		 1081static void remove_all_osds(struct ceph_osd_client *osdc)
1082{
048a9d2d 1083 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 1084 mutex_lock(&osdc->request_mutex);
1085 while (!RB_EMPTY_ROOT(&osdc->osds)) {
1086 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
1087 struct ceph_osd, o_node);
7eb71e03 1088 remove_osd(osdc, osd);
aca420bc
SW		 1089 }
1090 mutex_unlock(&osdc->request_mutex);
1091}
1092
f5a2041b
YS		 1093static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1094 struct ceph_osd *osd)
1095{
bbf37ec3 1096 dout("%s %p\n", __func__, osd);
f5a2041b 1097 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1098
f5a2041b 1099 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
a319bf56 1100 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1101}
1102
bbf37ec3
ID		 1103static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1104 struct ceph_osd *osd)
1105{
1106 dout("%s %p\n", __func__, osd);
1107
1108 if (list_empty(&osd->o_requests) &&
1109 list_empty(&osd->o_linger_requests))
1110 __move_osd_to_lru(osdc, osd);
1111}
1112
f5a2041b
YS		 1113static void __remove_osd_from_lru(struct ceph_osd *osd)
1114{
1115 dout("__remove_osd_from_lru %p\n", osd);
1116 if (!list_empty(&osd->o_osd_lru))
1117 list_del_init(&osd->o_osd_lru);
1118}
1119
aca420bc 1120static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1121{
1122 struct ceph_osd *osd, *nosd;
1123
1124 dout("__remove_old_osds %p\n", osdc);
1125 mutex_lock(&osdc->request_mutex);
1126 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1127 if (time_before(jiffies, osd->lru_ttl))
f5a2041b 1128 break;
7eb71e03 1129 remove_osd(osdc, osd);
f5a2041b
YS		 1130 }
1131 mutex_unlock(&osdc->request_mutex);
1132}
1133
f24e9980
SW		 1134/*
1135 * reset osd connect
1136 */
f5a2041b 1137static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1138{
c3acb181 1139 struct ceph_entity_addr *peer_addr;
f24e9980 1140
f5a2041b 1141 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1142 if (list_empty(&osd->o_requests) &&
1143 list_empty(&osd->o_linger_requests)) {
7eb71e03 1144 remove_osd(osdc, osd);
c3acb181
AE		 1145 return -ENODEV;
1146 }
1147
1148 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1149 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1150 !ceph_con_opened(&osd->o_con)) {
1151 struct ceph_osd_request *req;
1152
0b4af2e8
ID		 1153 dout("osd addr hasn't changed and connection never opened, "
1154 "letting msgr retry\n");
87b315a5
SW		 1155 /* touch each r_stamp for handle_timeout()'s benfit */
1156 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1157 req->r_stamp = jiffies;
c3acb181
AE		 1158
1159 return -EAGAIN;
f24e9980 1160 }
c3acb181
AE		 1161
1162 ceph_con_close(&osd->o_con);
1163 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1164 osd->o_incarnation++;
1165
1166 return 0;
f24e9980
SW		 1167}
1168
1169static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1170{
1171 struct rb_node **p = &osdc->osds.rb_node;
1172 struct rb_node *parent = NULL;
1173 struct ceph_osd *osd = NULL;
1174
aca420bc 1175 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1176 while (*p) {
1177 parent = *p;
1178 osd = rb_entry(parent, struct ceph_osd, o_node);
1179 if (new->o_osd < osd->o_osd)
1180 p = &(*p)->rb_left;
1181 else if (new->o_osd > osd->o_osd)
1182 p = &(*p)->rb_right;
1183 else
1184 BUG();
1185 }
1186
1187 rb_link_node(&new->o_node, parent, p);
1188 rb_insert_color(&new->o_node, &osdc->osds);
1189}
1190
1191static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1192{
1193 struct ceph_osd *osd;
1194 struct rb_node *n = osdc->osds.rb_node;
1195
1196 while (n) {
1197 osd = rb_entry(n, struct ceph_osd, o_node);
1198 if (o < osd->o_osd)
1199 n = n->rb_left;
1200 else if (o > osd->o_osd)
1201 n = n->rb_right;
1202 else
1203 return osd;
1204 }
1205 return NULL;
1206}
1207
422d2cb8
YS		 1208static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1209{
1210 schedule_delayed_work(&osdc->timeout_work,
a319bf56 1211 osdc->client->options->osd_keepalive_timeout);
422d2cb8
YS		 1212}
1213
1214static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1215{
1216 cancel_delayed_work(&osdc->timeout_work);
1217}
f24e9980
SW		 1218
1219/*
1220 * Register request, assign tid. If this is the first request, set up
1221 * the timeout event.
1222 */
a40c4f10
YS		 1223static void __register_request(struct ceph_osd_client *osdc,
1224 struct ceph_osd_request *req)
f24e9980 1225{
f24e9980 1226 req->r_tid = ++osdc->last_tid;
6df058c0 1227 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1228 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1229 __insert_request(osdc, req);
1230 ceph_osdc_get_request(req);
1231 osdc->num_requests++;
f24e9980 1232 if (osdc->num_requests == 1) {
422d2cb8
YS		 1233 dout(" first request, scheduling timeout\n");
1234 __schedule_osd_timeout(osdc);
f24e9980 1235 }
a40c4f10
YS		 1236}
1237
f24e9980
SW		 1238/*
1239 * called under osdc->request_mutex
1240 */
1241static void __unregister_request(struct ceph_osd_client *osdc,
1242 struct ceph_osd_request *req)
1243{
35f9f8a0
SW		 1244 if (RB_EMPTY_NODE(&req->r_node)) {
1245 dout("__unregister_request %p tid %lld not registered\n",
1246 req, req->r_tid);
1247 return;
1248 }
1249
f24e9980
SW		 1250 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1251 rb_erase(&req->r_node, &osdc->requests);
6562d661 1252 RB_CLEAR_NODE(&req->r_node);
f24e9980
SW		 1253 osdc->num_requests--;
1254
0ba6478d
SW		 1255 if (req->r_osd) {
1256 /* make sure the original request isn't in flight. */
6740a845 1257 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1258
1259 list_del_init(&req->r_osd_item);
bbf37ec3 1260 maybe_move_osd_to_lru(osdc, req->r_osd);
4f23409e 1261 if (list_empty(&req->r_linger_osd_item))
a40c4f10 1262 req->r_osd = NULL;
0ba6478d 1263 }
f24e9980 1264
7d5f2481 1265 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1266 ceph_osdc_put_request(req);
1267
422d2cb8
YS		 1268 if (osdc->num_requests == 0) {
1269 dout(" no requests, canceling timeout\n");
1270 __cancel_osd_timeout(osdc);
f24e9980
SW		 1271 }
1272}
1273
1274/*
1275 * Cancel a previously queued request message
1276 */
1277static void __cancel_request(struct ceph_osd_request *req)
1278{
6bc18876 1279 if (req->r_sent && req->r_osd) {
6740a845 1280 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1281 req->r_sent = 0;
1282 }
1283}
1284
a40c4f10
YS		 1285static void __register_linger_request(struct ceph_osd_client *osdc,
1286 struct ceph_osd_request *req)
1287{
af593064
ID		 1288 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1289 WARN_ON(!req->r_linger);
1290
96e4dac6 1291 ceph_osdc_get_request(req);
a40c4f10 1292 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89 1293 if (req->r_osd)
1d0326b1 1294 list_add_tail(&req->r_linger_osd_item,
6194ea89 1295 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1296}
1297
1298static void __unregister_linger_request(struct ceph_osd_client *osdc,
1299 struct ceph_osd_request *req)
1300{
af593064
ID		 1301 WARN_ON(!req->r_linger);
1302
1303 if (list_empty(&req->r_linger_item)) {
1304 dout("%s %p tid %llu not registered\n", __func__, req,
1305 req->r_tid);
1306 return;
1307 }
1308
1309 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
61c74035 1310 list_del_init(&req->r_linger_item);
af593064 1311
a40c4f10 1312 if (req->r_osd) {
1d0326b1 1313 list_del_init(&req->r_linger_osd_item);
bbf37ec3 1314 maybe_move_osd_to_lru(osdc, req->r_osd);
fbdb9190
SW		 1315 if (list_empty(&req->r_osd_item))
1316 req->r_osd = NULL;
a40c4f10 1317 }
96e4dac6 1318 ceph_osdc_put_request(req);
a40c4f10
YS		 1319}
1320
a40c4f10
YS		 1321void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1322 struct ceph_osd_request *req)
1323{
1324 if (!req->r_linger) {
1325 dout("set_request_linger %p\n", req);
1326 req->r_linger = 1;
a40c4f10
YS		 1327 }
1328}
1329EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1330
d29adb34
JD		 1331/*
1332 * Returns whether a request should be blocked from being sent
1333 * based on the current osdmap and osd_client settings.
1334 *
1335 * Caller should hold map_sem for read.
1336 */
1337static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1338 struct ceph_osd_request *req)
1339{
1340 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1341 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1342 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1343 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1344 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1345}
1346
17a13e40
ID		 1347/*
1348 * Calculate mapping of a request to a PG. Takes tiering into account.
1349 */
1350static int __calc_request_pg(struct ceph_osdmap *osdmap,
1351 struct ceph_osd_request *req,
1352 struct ceph_pg *pg_out)
1353{
205ee118
ID		 1354 bool need_check_tiering;
1355
1356 need_check_tiering = false;
1357 if (req->r_target_oloc.pool == -1) {
1358 req->r_target_oloc = req->r_base_oloc; /* struct */
1359 need_check_tiering = true;
1360 }
1361 if (req->r_target_oid.name_len == 0) {
1362 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1363 need_check_tiering = true;
1364 }
1365
1366 if (need_check_tiering &&
1367 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
17a13e40
ID		 1368 struct ceph_pg_pool_info *pi;
1369
205ee118 1370 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
17a13e40
ID		 1371 if (pi) {
1372 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1373 pi->read_tier >= 0)
205ee118 1374 req->r_target_oloc.pool = pi->read_tier;
17a13e40
ID		 1375 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1376 pi->write_tier >= 0)
205ee118 1377 req->r_target_oloc.pool = pi->write_tier;
17a13e40
ID		 1378 }
1379 /* !pi is caught in ceph_oloc_oid_to_pg() */
1380 }
1381
205ee118
ID		 1382 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1383 &req->r_target_oid, pg_out);
17a13e40
ID		 1384}
1385
f671b581
ID		 1386static void __enqueue_request(struct ceph_osd_request *req)
1387{
1388 struct ceph_osd_client *osdc = req->r_osdc;
1389
1390 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1391 req->r_osd ? req->r_osd->o_osd : -1);
1392
1393 if (req->r_osd) {
1394 __remove_osd_from_lru(req->r_osd);
1395 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1396 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1397 } else {
1398 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1399 }
1400}
1401
f24e9980
SW		 1402/*
1403 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1404 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1405 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1406 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1407 *
1408 * Return 0 if unchanged, 1 if changed, or negative on error.
1409 *
1410 * Caller should hold map_sem for read and request_mutex.
1411 */
6f6c7006 1412static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1413 struct ceph_osd_request *req, int force_resend)
f24e9980 1414{
5b191d99 1415 struct ceph_pg pgid;
d85b7056 1416 int acting[CEPH_PG_MAX_SIZE];
8008ab10 1417 int num, o;
f24e9980 1418 int err;
d29adb34 1419 bool was_paused;
f24e9980 1420
6f6c7006 1421 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40
ID		 1422
1423 err = __calc_request_pg(osdc->osdmap, req, &pgid);
6f6c7006
SW		 1424 if (err) {
1425 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1426 return err;
6f6c7006 1427 }
7740a42f
SW		 1428 req->r_pgid = pgid;
1429
8008ab10
ID		 1430 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o);
1431 if (num < 0)
1432 num = 0;
f24e9980 1433
d29adb34
JD		 1434 was_paused = req->r_paused;
1435 req->r_paused = __req_should_be_paused(osdc, req);
1436 if (was_paused && !req->r_paused)
1437 force_resend = 1;
1438
38d6453c
SW		 1439 if ((!force_resend &&
1440 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1441 req->r_sent >= req->r_osd->o_incarnation &&
1442 req->r_num_pg_osds == num &&
1443 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
d29adb34
JD		 1444 (req->r_osd == NULL && o == -1) ||
1445 req->r_paused)
f24e9980
SW		 1446 return 0; /* no change */
1447
5b191d99
SW		 1448 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1449 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1450 req->r_osd ? req->r_osd->o_osd : -1);
1451
d85b7056
SW		 1452 /* record full pg acting set */
1453 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1454 req->r_num_pg_osds = num;
1455
f24e9980
SW		 1456 if (req->r_osd) {
1457 __cancel_request(req);
1458 list_del_init(&req->r_osd_item);
a390de02 1459 list_del_init(&req->r_linger_osd_item);
f24e9980
SW		 1460 req->r_osd = NULL;
1461 }
1462
1463 req->r_osd = __lookup_osd(osdc, o);
1464 if (!req->r_osd && o >= 0) {
c99eb1c7 1465 err = -ENOMEM;
e10006f8 1466 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1467 if (!req->r_osd) {
1468 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1469 goto out;
6f6c7006 1470 }
f24e9980 1471
6f6c7006 1472 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1473 __insert_osd(osdc, req->r_osd);
1474
b7a9e5dd
SW		 1475 ceph_con_open(&req->r_osd->o_con,
1476 CEPH_ENTITY_TYPE_OSD, o,
1477 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1478 }
1479
f671b581 1480 __enqueue_request(req);
d85b7056 1481 err = 1; /* osd or pg changed */
f24e9980
SW		 1482
1483out:
f24e9980
SW		 1484 return err;
1485}
1486
1487/*
1488 * caller should hold map_sem (for read) and request_mutex
1489 */
56e925b6
SW		 1490static void __send_request(struct ceph_osd_client *osdc,
1491 struct ceph_osd_request *req)
f24e9980 1492{
1b83bef2 1493 void *p;
f24e9980 1494
1b83bef2
SW		 1495 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1496 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1497 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1498
1499 /* fill in message content that changes each time we send it */
1500 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1501 put_unaligned_le32(req->r_flags, req->r_request_flags);
205ee118 1502 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1b83bef2
SW		 1503 p = req->r_request_pgid;
1504 ceph_encode_64(&p, req->r_pgid.pool);
1505 ceph_encode_32(&p, req->r_pgid.seed);
1506 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1507 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1508 sizeof(req->r_reassert_version));
2169aea6 1509
3dd72fc0 1510 req->r_stamp = jiffies;
07a27e22 1511 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1512
1513 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1514
f24e9980 1515 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1516
1517 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1518}
1519
6f6c7006
SW		 1520/*
1521 * Send any requests in the queue (req_unsent).
1522 */
f9d25199 1523static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1524{
1525 struct ceph_osd_request *req, *tmp;
1526
f9d25199
AE		 1527 dout("__send_queued\n");
1528 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1529 __send_request(osdc, req);
6f6c7006
SW		 1530}
1531
0bbfdfe8
ID		 1532/*
1533 * Caller should hold map_sem for read and request_mutex.
1534 */
1535static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1536 struct ceph_osd_request *req,
1537 bool nofail)
1538{
1539 int rc;
1540
1541 __register_request(osdc, req);
1542 req->r_sent = 0;
1543 req->r_got_reply = 0;
1544 rc = __map_request(osdc, req, 0);
1545 if (rc < 0) {
1546 if (nofail) {
1547 dout("osdc_start_request failed map, "
1548 " will retry %lld\n", req->r_tid);
1549 rc = 0;
1550 } else {
1551 __unregister_request(osdc, req);
1552 }
1553 return rc;
1554 }
1555
1556 if (req->r_osd == NULL) {
1557 dout("send_request %p no up osds in pg\n", req);
1558 ceph_monc_request_next_osdmap(&osdc->client->monc);
1559 } else {
1560 __send_queued(osdc);
1561 }
1562
1563 return 0;
1564}
1565
f24e9980
SW		 1566/*
1567 * Timeout callback, called every N seconds when 1 or more osd
1568 * requests has been active for more than N seconds. When this
1569 * happens, we ping all OSDs with requests who have timed out to
1570 * ensure any communications channel reset is detected. Reset the
1571 * request timeouts another N seconds in the future as we go.
1572 * Reschedule the timeout event another N seconds in future (unless
1573 * there are no open requests).
1574 */
1575static void handle_timeout(struct work_struct *work)
1576{
1577 struct ceph_osd_client *osdc =
1578 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 1579 struct ceph_options *opts = osdc->client->options;
83aff95e 1580 struct ceph_osd_request *req;
f24e9980 1581 struct ceph_osd *osd;
422d2cb8 1582 struct list_head slow_osds;
f24e9980
SW		 1583 dout("timeout\n");
1584 down_read(&osdc->map_sem);
1585
1586 ceph_monc_request_next_osdmap(&osdc->client->monc);
1587
1588 mutex_lock(&osdc->request_mutex);
f24e9980 1589
422d2cb8
YS		 1590 /*
1591 * ping osds that are a bit slow. this ensures that if there
1592 * is a break in the TCP connection we will notice, and reopen
1593 * a connection with that osd (from the fault callback).
1594 */
1595 INIT_LIST_HEAD(&slow_osds);
1596 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
a319bf56
ID		 1597 if (time_before(jiffies,
1598 req->r_stamp + opts->osd_keepalive_timeout))
422d2cb8
YS		 1599 break;
1600
1601 osd = req->r_osd;
1602 BUG_ON(!osd);
1603 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1604 req->r_tid, osd->o_osd);
422d2cb8
YS		 1605 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1606 }
1607 while (!list_empty(&slow_osds)) {
1608 osd = list_entry(slow_osds.next, struct ceph_osd,
1609 o_keepalive_item);
1610 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1611 ceph_con_keepalive(&osd->o_con);
1612 }
1613
422d2cb8 1614 __schedule_osd_timeout(osdc);
f9d25199 1615 __send_queued(osdc);
f24e9980 1616 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1617 up_read(&osdc->map_sem);
1618}
1619
f5a2041b
YS		 1620static void handle_osds_timeout(struct work_struct *work)
1621{
1622 struct ceph_osd_client *osdc =
1623 container_of(work, struct ceph_osd_client,
1624 osds_timeout_work.work);
a319bf56 1625 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
f5a2041b
YS		 1626
1627 dout("osds timeout\n");
1628 down_read(&osdc->map_sem);
aca420bc 1629 remove_old_osds(osdc);
f5a2041b
YS		 1630 up_read(&osdc->map_sem);
1631
1632 schedule_delayed_work(&osdc->osds_timeout_work,
1633 round_jiffies_relative(delay));
1634}
1635
205ee118
ID		 1636static int ceph_oloc_decode(void **p, void *end,
1637 struct ceph_object_locator *oloc)
1638{
1639 u8 struct_v, struct_cv;
1640 u32 len;
1641 void *struct_end;
1642 int ret = 0;
1643
1644 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1645 struct_v = ceph_decode_8(p);
1646 struct_cv = ceph_decode_8(p);
1647 if (struct_v < 3) {
1648 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1649 struct_v, struct_cv);
1650 goto e_inval;
1651 }
1652 if (struct_cv > 6) {
1653 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1654 struct_v, struct_cv);
1655 goto e_inval;
1656 }
1657 len = ceph_decode_32(p);
1658 ceph_decode_need(p, end, len, e_inval);
1659 struct_end = *p + len;
1660
1661 oloc->pool = ceph_decode_64(p);
1662 *p += 4; /* skip preferred */
1663
1664 len = ceph_decode_32(p);
1665 if (len > 0) {
1666 pr_warn("ceph_object_locator::key is set\n");
1667 goto e_inval;
1668 }
1669
1670 if (struct_v >= 5) {
1671 len = ceph_decode_32(p);
1672 if (len > 0) {
1673 pr_warn("ceph_object_locator::nspace is set\n");
1674 goto e_inval;
1675 }
1676 }
1677
1678 if (struct_v >= 6) {
1679 s64 hash = ceph_decode_64(p);
1680 if (hash != -1) {
1681 pr_warn("ceph_object_locator::hash is set\n");
1682 goto e_inval;
1683 }
1684 }
1685
1686 /* skip the rest */
1687 *p = struct_end;
1688out:
1689 return ret;
1690
1691e_inval:
1692 ret = -EINVAL;
1693 goto out;
1694}
1695
1696static int ceph_redirect_decode(void **p, void *end,
1697 struct ceph_request_redirect *redir)
1698{
1699 u8 struct_v, struct_cv;
1700 u32 len;
1701 void *struct_end;
1702 int ret;
1703
1704 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1705 struct_v = ceph_decode_8(p);
1706 struct_cv = ceph_decode_8(p);
1707 if (struct_cv > 1) {
1708 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1709 struct_v, struct_cv);
1710 goto e_inval;
1711 }
1712 len = ceph_decode_32(p);
1713 ceph_decode_need(p, end, len, e_inval);
1714 struct_end = *p + len;
1715
1716 ret = ceph_oloc_decode(p, end, &redir->oloc);
1717 if (ret)
1718 goto out;
1719
1720 len = ceph_decode_32(p);
1721 if (len > 0) {
1722 pr_warn("ceph_request_redirect::object_name is set\n");
1723 goto e_inval;
1724 }
1725
1726 len = ceph_decode_32(p);
1727 *p += len; /* skip osd_instructions */
1728
1729 /* skip the rest */
1730 *p = struct_end;
1731out:
1732 return ret;
1733
1734e_inval:
1735 ret = -EINVAL;
1736 goto out;
1737}
1738
25845472
SW		 1739static void complete_request(struct ceph_osd_request *req)
1740{
25845472
SW		 1741 complete_all(&req->r_safe_completion); /* fsync waiter */
1742}
1743
f24e9980
SW		 1744/*
1745 * handle osd op reply. either call the callback if it is specified,
1746 * or do the completion to wake up the waiting thread.
1747 */
350b1c32
SW		 1748static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1749 struct ceph_connection *con)
f24e9980 1750{
1b83bef2 1751 void *p, *end;
f24e9980 1752 struct ceph_osd_request *req;
205ee118 1753 struct ceph_request_redirect redir;
f24e9980 1754 u64 tid;
1b83bef2 1755 int object_len;
79528734
AE		 1756 unsigned int numops;
1757 int payload_len, flags;
0ceed5db 1758 s32 result;
1b83bef2
SW		 1759 s32 retry_attempt;
1760 struct ceph_pg pg;
1761 int err;
1762 u32 reassert_epoch;
1763 u64 reassert_version;
1764 u32 osdmap_epoch;
0d5af164 1765 int already_completed;
9fc6e064 1766 u32 bytes;
79528734 1767 unsigned int i;
f24e9980 1768
6df058c0 1769 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1770 dout("handle_reply %p tid %llu\n", msg, tid);
1771
1772 p = msg->front.iov_base;
1773 end = p + msg->front.iov_len;
1774
1775 ceph_decode_need(&p, end, 4, bad);
1776 object_len = ceph_decode_32(&p);
1777 ceph_decode_need(&p, end, object_len, bad);
1778 p += object_len;
1779
ef4859d6 1780 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1781 if (err)
f24e9980 1782 goto bad;
1b83bef2
SW		 1783
1784 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1785 flags = ceph_decode_64(&p);
1786 result = ceph_decode_32(&p);
1787 reassert_epoch = ceph_decode_32(&p);
1788 reassert_version = ceph_decode_64(&p);
1789 osdmap_epoch = ceph_decode_32(&p);
1790
f24e9980 1791 /* lookup */
ff513ace 1792 down_read(&osdc->map_sem);
f24e9980
SW		 1793 mutex_lock(&osdc->request_mutex);
1794 req = __lookup_request(osdc, tid);
1795 if (req == NULL) {
1796 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1797 goto bad_mutex;
f24e9980
SW		 1798 }
1799 ceph_osdc_get_request(req);
1b83bef2
SW		 1800
1801 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1802 req, result);
1803
18741196 1804 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2
SW		 1805 numops = ceph_decode_32(&p);
1806 if (numops > CEPH_OSD_MAX_OP)
1807 goto bad_put;
1808 if (numops != req->r_num_ops)
1809 goto bad_put;
1810 payload_len = 0;
18741196 1811 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1812 for (i = 0; i < numops; i++) {
1813 struct ceph_osd_op *op = p;
1814 int len;
1815
1816 len = le32_to_cpu(op->payload_len);
1817 req->r_reply_op_len[i] = len;
1818 dout(" op %d has %d bytes\n", i, len);
1819 payload_len += len;
1820 p += sizeof(*op);
1821 }
9fc6e064
AE		 1822 bytes = le32_to_cpu(msg->hdr.data_len);
1823 if (payload_len != bytes) {
b9a67899
JP		 1824 pr_warn("sum of op payload lens %d != data_len %d\n",
1825 payload_len, bytes);
1b83bef2
SW		 1826 goto bad_put;
1827 }
1828
18741196 1829 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1830 retry_attempt = ceph_decode_32(&p);
1831 for (i = 0; i < numops; i++)
1832 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1833
205ee118
ID		 1834 if (le16_to_cpu(msg->hdr.version) >= 6) {
1835 p += 8 + 4; /* skip replay_version */
1836 p += 8; /* skip user_version */
eb845ff1 1837
205ee118
ID		 1838 err = ceph_redirect_decode(&p, end, &redir);
1839 if (err)
1840 goto bad_put;
1841 } else {
1842 redir.oloc.pool = -1;
1843 }
f24e9980 1844
205ee118
ID		 1845 if (redir.oloc.pool != -1) {
1846 dout("redirect pool %lld\n", redir.oloc.pool);
1847
1848 __unregister_request(osdc, req);
205ee118
ID		 1849
1850 req->r_target_oloc = redir.oloc; /* struct */
1851
1852 /*
1853 * Start redirect requests with nofail=true. If
1854 * mapping fails, request will end up on the notarget
1855 * list, waiting for the new osdmap (which can take
1856 * a while), even though the original request mapped
1857 * successfully. In the future we might want to follow
1858 * original request's nofail setting here.
1859 */
ff513ace 1860 err = __ceph_osdc_start_request(osdc, req, true);
205ee118
ID		 1861 BUG_ON(err);
1862
ff513ace 1863 goto out_unlock;
205ee118
ID		 1864 }
1865
1866 already_completed = req->r_got_reply;
1867 if (!req->r_got_reply) {
1b83bef2 1868 req->r_result = result;
f24e9980
SW		 1869 dout("handle_reply result %d bytes %d\n", req->r_result,
1870 bytes);
1871 if (req->r_result == 0)
1872 req->r_result = bytes;
1873
1874 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1875 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1876 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1877
1878 req->r_got_reply = 1;
1879 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1880 dout("handle_reply tid %llu dup ack\n", tid);
ff513ace 1881 goto out_unlock;
f24e9980
SW		 1882 }
1883
1884 dout("handle_reply tid %llu flags %d\n", tid, flags);
1885
a40c4f10
YS		 1886 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1887 __register_linger_request(osdc, req);
1888
f24e9980 1889 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1890 if (result < 0 ||
1891 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1892 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1893 __unregister_request(osdc, req);
1894
1895 mutex_unlock(&osdc->request_mutex);
ff513ace 1896 up_read(&osdc->map_sem);
f24e9980 1897
eb845ff1 1898 if (!already_completed) {
61c5d6bf
YZ		 1899 if (req->r_unsafe_callback &&
1900 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1901 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1902 if (req->r_callback)
1903 req->r_callback(req, msg);
1904 else
1905 complete_all(&req->r_completion);
1906 }
f24e9980 1907
61c5d6bf
YZ		 1908 if (flags & CEPH_OSD_FLAG_ONDISK) {
1909 if (req->r_unsafe_callback && already_completed)
1910 req->r_unsafe_callback(req, false);
25845472 1911 complete_request(req);
61c5d6bf 1912 }
f24e9980 1913
ff513ace 1914out:
a40c4f10 1915 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1916 ceph_osdc_put_request(req);
1917 return;
ff513ace
ID		 1918out_unlock:
1919 mutex_unlock(&osdc->request_mutex);
1920 up_read(&osdc->map_sem);
1921 goto out;
f24e9980 1922
1b83bef2 1923bad_put:
37c89bde
LW		 1924 req->r_result = -EIO;
1925 __unregister_request(osdc, req);
1926 if (req->r_callback)
1927 req->r_callback(req, msg);
1928 else
1929 complete_all(&req->r_completion);
1930 complete_request(req);
1b83bef2 1931 ceph_osdc_put_request(req);
8058fd45
AE		 1932bad_mutex:
1933 mutex_unlock(&osdc->request_mutex);
ff513ace 1934 up_read(&osdc->map_sem);
f24e9980 1935bad:
1b83bef2
SW		 1936 pr_err("corrupt osd_op_reply got %d %d\n",
1937 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1938 ceph_msg_dump(msg);
f24e9980
SW		 1939}
1940
6f6c7006 1941static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1942{
f24e9980 1943 struct rb_node *p, *n;
f24e9980 1944
7eb71e03 1945 dout("%s %p\n", __func__, osdc);
6f6c7006
SW		 1946 for (p = rb_first(&osdc->osds); p; p = n) {
1947 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1948
6f6c7006
SW		 1949 n = rb_next(p);
1950 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1951 memcmp(&osd->o_con.peer_addr,
1952 ceph_osd_addr(osdc->osdmap,
1953 osd->o_osd),
1954 sizeof(struct ceph_entity_addr)) != 0)
1955 __reset_osd(osdc, osd);
f24e9980 1956 }
422d2cb8
YS		 1957}
1958
1959/*
6f6c7006
SW		 1960 * Requeue requests whose mapping to an OSD has changed. If requests map to
1961 * no osd, request a new map.
422d2cb8 1962 *
e6d50f67 1963 * Caller should hold map_sem for read.
422d2cb8 1964 */
9a1ea2db
JD		 1965static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1966 bool force_resend_writes)
422d2cb8 1967{
a40c4f10 1968 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1969 struct rb_node *p;
1970 int needmap = 0;
1971 int err;
9a1ea2db 1972 bool force_resend_req;
422d2cb8 1973
9a1ea2db
JD		 1974 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1975 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1976 mutex_lock(&osdc->request_mutex);
6194ea89 1977 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1978 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1979 p = rb_next(p);
ab60b16d
AE		 1980
1981 /*
1982 * For linger requests that have not yet been
1983 * registered, move them to the linger list; they'll
1984 * be sent to the osd in the loop below. Unregister
1985 * the request before re-registering it as a linger
1986 * request to ensure the __map_request() below
1987 * will decide it needs to be sent.
1988 */
1989 if (req->r_linger && list_empty(&req->r_linger_item)) {
1990 dout("%p tid %llu restart on osd%d\n",
1991 req, req->r_tid,
1992 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 1993 ceph_osdc_get_request(req);
ab60b16d
AE		 1994 __unregister_request(osdc, req);
1995 __register_linger_request(osdc, req);
96e4dac6 1996 ceph_osdc_put_request(req);
ab60b16d
AE		 1997 continue;
1998 }
1999
9a1ea2db
JD		 2000 force_resend_req = force_resend ||
2001 (force_resend_writes &&
2002 req->r_flags & CEPH_OSD_FLAG_WRITE);
2003 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 2004 if (err < 0)
2005 continue; /* error */
2006 if (req->r_osd == NULL) {
2007 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
2008 needmap++; /* request a newer map */
2009 } else if (err > 0) {
6194ea89
SW		 2010 if (!req->r_linger) {
2011 dout("%p tid %llu requeued on osd%d\n", req,
2012 req->r_tid,
2013 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 2014 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 2015 }
2016 }
a40c4f10
YS		 2017 }
2018
2019 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
2020 r_linger_item) {
2021 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
2022
9a1ea2db
JD		 2023 err = __map_request(osdc, req,
2024 force_resend || force_resend_writes);
ab60b16d 2025 dout("__map_request returned %d\n", err);
a40c4f10
YS		 2026 if (err < 0)
2027 continue; /* hrm! */
b0494532
ID		 2028 if (req->r_osd == NULL || err > 0) {
2029 if (req->r_osd == NULL) {
2030 dout("lingering %p tid %llu maps to no osd\n",
2031 req, req->r_tid);
2032 /*
2033 * A homeless lingering request makes
2034 * no sense, as it's job is to keep
2035 * a particular OSD connection open.
2036 * Request a newer map and kick the
2037 * request, knowing that it won't be
2038 * resent until we actually get a map
2039 * that can tell us where to send it.
2040 */
2041 needmap++;
2042 }
a40c4f10 2043
b0494532
ID		 2044 dout("kicking lingering %p tid %llu osd%d\n", req,
2045 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1);
2046 __register_request(osdc, req);
2047 __unregister_linger_request(osdc, req);
2048 }
6f6c7006 2049 }
14d2f38d 2050 reset_changed_osds(osdc);
f24e9980
SW		 2051 mutex_unlock(&osdc->request_mutex);
2052
2053 if (needmap) {
2054 dout("%d requests for down osds, need new map\n", needmap);
2055 ceph_monc_request_next_osdmap(&osdc->client->monc);
2056 }
422d2cb8 2057}
6f6c7006
SW		 2058
2059
f24e9980
SW		 2060/*
2061 * Process updated osd map.
2062 *
2063 * The message contains any number of incremental and full maps, normally
2064 * indicating some sort of topology change in the cluster. Kick requests
2065 * off to different OSDs as needed.
2066 */
2067void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2068{
2069 void *p, *end, *next;
2070 u32 nr_maps, maplen;
2071 u32 epoch;
2072 struct ceph_osdmap *newmap = NULL, *oldmap;
2073 int err;
2074 struct ceph_fsid fsid;
9a1ea2db 2075 bool was_full;
f24e9980
SW		 2076
2077 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2078 p = msg->front.iov_base;
2079 end = p + msg->front.iov_len;
2080
2081 /* verify fsid */
2082 ceph_decode_need(&p, end, sizeof(fsid), bad);
2083 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 2084 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2085 return;
f24e9980
SW		 2086
2087 down_write(&osdc->map_sem);
2088
9a1ea2db
JD		 2089 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2090
f24e9980
SW		 2091 /* incremental maps */
2092 ceph_decode_32_safe(&p, end, nr_maps, bad);
2093 dout(" %d inc maps\n", nr_maps);
2094 while (nr_maps > 0) {
2095 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2096 epoch = ceph_decode_32(&p);
2097 maplen = ceph_decode_32(&p);
f24e9980
SW		 2098 ceph_decode_need(&p, end, maplen, bad);
2099 next = p + maplen;
2100 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2101 dout("applying incremental map %u len %d\n",
2102 epoch, maplen);
2103 newmap = osdmap_apply_incremental(&p, next,
2104 osdc->osdmap,
15d9882c 2105 &osdc->client->msgr);
f24e9980
SW		 2106 if (IS_ERR(newmap)) {
2107 err = PTR_ERR(newmap);
2108 goto bad;
2109 }
30dc6381 2110 BUG_ON(!newmap);
f24e9980
SW		 2111 if (newmap != osdc->osdmap) {
2112 ceph_osdmap_destroy(osdc->osdmap);
2113 osdc->osdmap = newmap;
2114 }
9a1ea2db
JD		 2115 was_full = was_full ||
2116 ceph_osdmap_flag(osdc->osdmap,
2117 CEPH_OSDMAP_FULL);
2118 kick_requests(osdc, 0, was_full);
f24e9980
SW		 2119 } else {
2120 dout("ignoring incremental map %u len %d\n",
2121 epoch, maplen);
2122 }
2123 p = next;
2124 nr_maps--;
2125 }
2126 if (newmap)
2127 goto done;
2128
2129 /* full maps */
2130 ceph_decode_32_safe(&p, end, nr_maps, bad);
2131 dout(" %d full maps\n", nr_maps);
2132 while (nr_maps) {
2133 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2134 epoch = ceph_decode_32(&p);
2135 maplen = ceph_decode_32(&p);
f24e9980
SW		 2136 ceph_decode_need(&p, end, maplen, bad);
2137 if (nr_maps > 1) {
2138 dout("skipping non-latest full map %u len %d\n",
2139 epoch, maplen);
2140 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2141 dout("skipping full map %u len %d, "
2142 "older than our %u\n", epoch, maplen,
2143 osdc->osdmap->epoch);
2144 } else {
38d6453c
SW		 2145 int skipped_map = 0;
2146
f24e9980 2147 dout("taking full map %u len %d\n", epoch, maplen);
a2505d63 2148 newmap = ceph_osdmap_decode(&p, p+maplen);
f24e9980
SW		 2149 if (IS_ERR(newmap)) {
2150 err = PTR_ERR(newmap);
2151 goto bad;
2152 }
30dc6381 2153 BUG_ON(!newmap);
f24e9980
SW		 2154 oldmap = osdc->osdmap;
2155 osdc->osdmap = newmap;
38d6453c
SW		 2156 if (oldmap) {
2157 if (oldmap->epoch + 1 < newmap->epoch)
2158 skipped_map = 1;
f24e9980 2159 ceph_osdmap_destroy(oldmap);
38d6453c 2160 }
9a1ea2db
JD		 2161 was_full = was_full ||
2162 ceph_osdmap_flag(osdc->osdmap,
2163 CEPH_OSDMAP_FULL);
2164 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2165 }
2166 p += maplen;
2167 nr_maps--;
2168 }
2169
b72e19b9
DC		 2170 if (!osdc->osdmap)
2171 goto bad;
f24e9980
SW		 2172done:
2173 downgrade_write(&osdc->map_sem);
2174 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 2175
2176 /*
2177 * subscribe to subsequent osdmap updates if full to ensure
2178 * we find out when we are no longer full and stop returning
2179 * ENOSPC.
2180 */
d29adb34
JD		 2181 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2182 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2183 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2184 ceph_monc_request_next_osdmap(&osdc->client->monc);
2185
f9d25199
AE		 2186 mutex_lock(&osdc->request_mutex);
2187 __send_queued(osdc);
2188 mutex_unlock(&osdc->request_mutex);
f24e9980 2189 up_read(&osdc->map_sem);
03066f23 2190 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2191 return;
2192
2193bad:
2194 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2195 ceph_msg_dump(msg);
f24e9980 2196 up_write(&osdc->map_sem);
f24e9980
SW		 2197}
2198
a40c4f10
YS		 2199/*
2200 * watch/notify callback event infrastructure
2201 *
2202 * These callbacks are used both for watch and notify operations.
2203 */
2204static void __release_event(struct kref *kref)
2205{
2206 struct ceph_osd_event *event =
2207 container_of(kref, struct ceph_osd_event, kref);
2208
2209 dout("__release_event %p\n", event);
2210 kfree(event);
2211}
2212
2213static void get_event(struct ceph_osd_event *event)
2214{
2215 kref_get(&event->kref);
2216}
2217
2218void ceph_osdc_put_event(struct ceph_osd_event *event)
2219{
2220 kref_put(&event->kref, __release_event);
2221}
2222EXPORT_SYMBOL(ceph_osdc_put_event);
2223
2224static void __insert_event(struct ceph_osd_client *osdc,
2225 struct ceph_osd_event *new)
2226{
2227 struct rb_node **p = &osdc->event_tree.rb_node;
2228 struct rb_node *parent = NULL;
2229 struct ceph_osd_event *event = NULL;
2230
2231 while (*p) {
2232 parent = *p;
2233 event = rb_entry(parent, struct ceph_osd_event, node);
2234 if (new->cookie < event->cookie)
2235 p = &(*p)->rb_left;
2236 else if (new->cookie > event->cookie)
2237 p = &(*p)->rb_right;
2238 else
2239 BUG();
2240 }
2241
2242 rb_link_node(&new->node, parent, p);
2243 rb_insert_color(&new->node, &osdc->event_tree);
2244}
2245
2246static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2247 u64 cookie)
2248{
2249 struct rb_node **p = &osdc->event_tree.rb_node;
2250 struct rb_node *parent = NULL;
2251 struct ceph_osd_event *event = NULL;
2252
2253 while (*p) {
2254 parent = *p;
2255 event = rb_entry(parent, struct ceph_osd_event, node);
2256 if (cookie < event->cookie)
2257 p = &(*p)->rb_left;
2258 else if (cookie > event->cookie)
2259 p = &(*p)->rb_right;
2260 else
2261 return event;
2262 }
2263 return NULL;
2264}
2265
2266static void __remove_event(struct ceph_osd_event *event)
2267{
2268 struct ceph_osd_client *osdc = event->osdc;
2269
2270 if (!RB_EMPTY_NODE(&event->node)) {
2271 dout("__remove_event removed %p\n", event);
2272 rb_erase(&event->node, &osdc->event_tree);
2273 ceph_osdc_put_event(event);
2274 } else {
2275 dout("__remove_event didn't remove %p\n", event);
2276 }
2277}
2278
2279int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2280 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2281 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2282{
2283 struct ceph_osd_event *event;
2284
2285 event = kmalloc(sizeof(*event), GFP_NOIO);
2286 if (!event)
2287 return -ENOMEM;
2288
2289 dout("create_event %p\n", event);
2290 event->cb = event_cb;
3c663bbd 2291 event->one_shot = 0;
a40c4f10
YS		 2292 event->data = data;
2293 event->osdc = osdc;
2294 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2295 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2296 kref_init(&event->kref); /* one ref for us */
2297 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2298
2299 spin_lock(&osdc->event_lock);
2300 event->cookie = ++osdc->event_count;
2301 __insert_event(osdc, event);
2302 spin_unlock(&osdc->event_lock);
2303
2304 *pevent = event;
2305 return 0;
2306}
2307EXPORT_SYMBOL(ceph_osdc_create_event);
2308
2309void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2310{
2311 struct ceph_osd_client *osdc = event->osdc;
2312
2313 dout("cancel_event %p\n", event);
2314 spin_lock(&osdc->event_lock);
2315 __remove_event(event);
2316 spin_unlock(&osdc->event_lock);
2317 ceph_osdc_put_event(event); /* caller's */
2318}
2319EXPORT_SYMBOL(ceph_osdc_cancel_event);
2320
2321
2322static void do_event_work(struct work_struct *work)
2323{
2324 struct ceph_osd_event_work *event_work =
2325 container_of(work, struct ceph_osd_event_work, work);
2326 struct ceph_osd_event *event = event_work->event;
2327 u64 ver = event_work->ver;
2328 u64 notify_id = event_work->notify_id;
2329 u8 opcode = event_work->opcode;
2330
2331 dout("do_event_work completing %p\n", event);
2332 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2333 dout("do_event_work completed %p\n", event);
2334 ceph_osdc_put_event(event);
2335 kfree(event_work);
2336}
2337
2338
2339/*
2340 * Process osd watch notifications
2341 */
3c663bbd
AE		 2342static void handle_watch_notify(struct ceph_osd_client *osdc,
2343 struct ceph_msg *msg)
a40c4f10
YS		 2344{
2345 void *p, *end;
2346 u8 proto_ver;
2347 u64 cookie, ver, notify_id;
2348 u8 opcode;
2349 struct ceph_osd_event *event;
2350 struct ceph_osd_event_work *event_work;
2351
2352 p = msg->front.iov_base;
2353 end = p + msg->front.iov_len;
2354
2355 ceph_decode_8_safe(&p, end, proto_ver, bad);
2356 ceph_decode_8_safe(&p, end, opcode, bad);
2357 ceph_decode_64_safe(&p, end, cookie, bad);
2358 ceph_decode_64_safe(&p, end, ver, bad);
2359 ceph_decode_64_safe(&p, end, notify_id, bad);
2360
2361 spin_lock(&osdc->event_lock);
2362 event = __find_event(osdc, cookie);
2363 if (event) {
3c663bbd 2364 BUG_ON(event->one_shot);
a40c4f10 2365 get_event(event);
a40c4f10
YS		 2366 }
2367 spin_unlock(&osdc->event_lock);
2368 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2369 cookie, ver, event);
2370 if (event) {
2371 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10 2372 if (!event_work) {
91883cd2
ID		 2373 pr_err("couldn't allocate event_work\n");
2374 ceph_osdc_put_event(event);
2375 return;
a40c4f10 2376 }
6b0ae409 2377 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2378 event_work->event = event;
2379 event_work->ver = ver;
2380 event_work->notify_id = notify_id;
2381 event_work->opcode = opcode;
a40c4f10 2382
91883cd2
ID		 2383 queue_work(osdc->notify_wq, &event_work->work);
2384 }
a40c4f10 2385
a40c4f10
YS		 2386 return;
2387
2388bad:
2389 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 2390}
2391
e65550fd
AE		 2392/*
2393 * build new request AND message
2394 *
2395 */
2396void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2397 struct ceph_snap_context *snapc, u64 snap_id,
2398 struct timespec *mtime)
2399{
2400 struct ceph_msg *msg = req->r_request;
2401 void *p;
2402 size_t msg_size;
2403 int flags = req->r_flags;
2404 u64 data_len;
2405 unsigned int i;
2406
2407 req->r_snapid = snap_id;
2408 req->r_snapc = ceph_get_snap_context(snapc);
2409
2410 /* encode request */
2411 msg->hdr.version = cpu_to_le16(4);
2412
2413 p = msg->front.iov_base;
2414 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2415 req->r_request_osdmap_epoch = p;
2416 p += 4;
2417 req->r_request_flags = p;
2418 p += 4;
2419 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2420 ceph_encode_timespec(p, mtime);
2421 p += sizeof(struct ceph_timespec);
2422 req->r_request_reassert_version = p;
2423 p += sizeof(struct ceph_eversion); /* will get filled in */
2424
2425 /* oloc */
2426 ceph_encode_8(&p, 4);
2427 ceph_encode_8(&p, 4);
2428 ceph_encode_32(&p, 8 + 4 + 4);
2429 req->r_request_pool = p;
2430 p += 8;
2431 ceph_encode_32(&p, -1); /* preferred */
2432 ceph_encode_32(&p, 0); /* key len */
2433
2434 ceph_encode_8(&p, 1);
2435 req->r_request_pgid = p;
2436 p += 8 + 4;
2437 ceph_encode_32(&p, -1); /* preferred */
2438
2439 /* oid */
3c972c95
ID		 2440 ceph_encode_32(&p, req->r_base_oid.name_len);
2441 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2442 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2443 req->r_base_oid.name, req->r_base_oid.name_len);
2444 p += req->r_base_oid.name_len;
e65550fd
AE		 2445
2446 /* ops--can imply data */
2447 ceph_encode_16(&p, (u16)req->r_num_ops);
2448 data_len = 0;
2449 for (i = 0; i < req->r_num_ops; i++) {
2450 data_len += osd_req_encode_op(req, p, i);
2451 p += sizeof(struct ceph_osd_op);
2452 }
2453
2454 /* snaps */
2455 ceph_encode_64(&p, req->r_snapid);
2456 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2457 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2458 if (req->r_snapc) {
2459 for (i = 0; i < snapc->num_snaps; i++) {
2460 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2461 }
2462 }
2463
2464 req->r_request_attempts = p;
2465 p += 4;
2466
2467 /* data */
2468 if (flags & CEPH_OSD_FLAG_WRITE) {
2469 u16 data_off;
2470
2471 /*
2472 * The header "data_off" is a hint to the receiver
2473 * allowing it to align received data into its
2474 * buffers such that there's no need to re-copy
2475 * it before writing it to disk (direct I/O).
2476 */
2477 data_off = (u16) (off & 0xffff);
2478 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2479 }
2480 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2481
2482 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2483 msg_size = p - msg->front.iov_base;
2484 msg->front.iov_len = msg_size;
2485 msg->hdr.front_len = cpu_to_le32(msg_size);
2486
2487 dout("build_request msg_size was %d\n", (int)msg_size);
2488}
2489EXPORT_SYMBOL(ceph_osdc_build_request);
2490
70636773
AE		 2491/*
2492 * Register request, send initial attempt.
2493 */
2494int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2495 struct ceph_osd_request *req,
2496 bool nofail)
2497{
0bbfdfe8 2498 int rc;
70636773 2499
f24e9980
SW		 2500 down_read(&osdc->map_sem);
2501 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2502
2503 rc = __ceph_osdc_start_request(osdc, req, nofail);
2504
f24e9980
SW		 2505 mutex_unlock(&osdc->request_mutex);
2506 up_read(&osdc->map_sem);
0bbfdfe8 2507
f24e9980
SW		 2508 return rc;
2509}
3d14c5d2 2510EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 2511
c9f9b93d
ID		 2512/*
2513 * Unregister a registered request. The request is not completed (i.e.
2514 * no callbacks or wakeups) - higher layers are supposed to know what
2515 * they are canceling.
2516 */
2517void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2518{
2519 struct ceph_osd_client *osdc = req->r_osdc;
2520
2521 mutex_lock(&osdc->request_mutex);
2522 if (req->r_linger)
2523 __unregister_linger_request(osdc, req);
2524 __unregister_request(osdc, req);
2525 mutex_unlock(&osdc->request_mutex);
2526
2527 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2528}
2529EXPORT_SYMBOL(ceph_osdc_cancel_request);
2530
f24e9980
SW		 2531/*
2532 * wait for a request to complete
2533 */
2534int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2535 struct ceph_osd_request *req)
2536{
2537 int rc;
2538
c9f9b93d
ID		 2539 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2540
f24e9980
SW		 2541 rc = wait_for_completion_interruptible(&req->r_completion);
2542 if (rc < 0) {
c9f9b93d
ID		 2543 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2544 ceph_osdc_cancel_request(req);
25845472 2545 complete_request(req);
f24e9980
SW		 2546 return rc;
2547 }
2548
c9f9b93d
ID		 2549 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2550 req->r_result);
f24e9980
SW		 2551 return req->r_result;
2552}
3d14c5d2 2553EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2554
2555/*
2556 * sync - wait for all in-flight requests to flush. avoid starvation.
2557 */
2558void ceph_osdc_sync(struct ceph_osd_client *osdc)
2559{
2560 struct ceph_osd_request *req;
2561 u64 last_tid, next_tid = 0;
2562
2563 mutex_lock(&osdc->request_mutex);
2564 last_tid = osdc->last_tid;
2565 while (1) {
2566 req = __lookup_request_ge(osdc, next_tid);
2567 if (!req)
2568 break;
2569 if (req->r_tid > last_tid)
2570 break;
2571
2572 next_tid = req->r_tid + 1;
2573 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2574 continue;
2575
2576 ceph_osdc_get_request(req);
2577 mutex_unlock(&osdc->request_mutex);
2578 dout("sync waiting on tid %llu (last is %llu)\n",
2579 req->r_tid, last_tid);
2580 wait_for_completion(&req->r_safe_completion);
2581 mutex_lock(&osdc->request_mutex);
2582 ceph_osdc_put_request(req);
2583 }
2584 mutex_unlock(&osdc->request_mutex);
2585 dout("sync done (thru tid %llu)\n", last_tid);
2586}
3d14c5d2 2587EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2588
dd935f44
JD		 2589/*
2590 * Call all pending notify callbacks - for use after a watch is
2591 * unregistered, to make sure no more callbacks for it will be invoked
2592 */
f6479449 2593void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44
JD		 2594{
2595 flush_workqueue(osdc->notify_wq);
2596}
2597EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2598
2599
f24e9980
SW		 2600/*
2601 * init, shutdown
2602 */
2603int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2604{
2605 int err;
2606
2607 dout("init\n");
2608 osdc->client = client;
2609 osdc->osdmap = NULL;
2610 init_rwsem(&osdc->map_sem);
2611 init_completion(&osdc->map_waiters);
2612 osdc->last_requested_map = 0;
2613 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2614 osdc->last_tid = 0;
2615 osdc->osds = RB_ROOT;
f5a2041b 2616 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2617 osdc->requests = RB_ROOT;
422d2cb8 2618 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2619 INIT_LIST_HEAD(&osdc->req_unsent);
2620 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2621 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2622 osdc->num_requests = 0;
2623 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2624 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2625 spin_lock_init(&osdc->event_lock);
2626 osdc->event_tree = RB_ROOT;
2627 osdc->event_count = 0;
f5a2041b
YS		 2628
2629 schedule_delayed_work(&osdc->osds_timeout_work,
a319bf56 2630 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
f24e9980 2631
5f44f142 2632 err = -ENOMEM;
f24e9980
SW		 2633 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2634 sizeof(struct ceph_osd_request));
2635 if (!osdc->req_mempool)
5f44f142 2636 goto out;
f24e9980 2637
d50b409f
SW		 2638 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2639 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2640 "osd_op");
f24e9980 2641 if (err < 0)
5f44f142 2642 goto out_mempool;
d50b409f 2643 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2644 OSD_OPREPLY_FRONT_LEN, 10, true,
2645 "osd_op_reply");
c16e7869
SW		 2646 if (err < 0)
2647 goto out_msgpool;
a40c4f10 2648
dbcae088 2649 err = -ENOMEM;
a40c4f10 2650 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2651 if (!osdc->notify_wq)
c172ec5c
ID		 2652 goto out_msgpool_reply;
2653
f24e9980 2654 return 0;
5f44f142 2655
c172ec5c
ID		 2656out_msgpool_reply:
2657 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2658out_msgpool:
2659 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2660out_mempool:
2661 mempool_destroy(osdc->req_mempool);
2662out:
2663 return err;
f24e9980
SW		 2664}
2665
2666void ceph_osdc_stop(struct ceph_osd_client *osdc)
2667{
a40c4f10
YS		 2668 flush_workqueue(osdc->notify_wq);
2669 destroy_workqueue(osdc->notify_wq);
f24e9980 2670 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2671 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2672 if (osdc->osdmap) {
2673 ceph_osdmap_destroy(osdc->osdmap);
2674 osdc->osdmap = NULL;
2675 }
aca420bc 2676 remove_all_osds(osdc);
f24e9980
SW		 2677 mempool_destroy(osdc->req_mempool);
2678 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2679 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2680}
2681
2682/*
2683 * Read some contiguous pages. If we cross a stripe boundary, shorten
2684 * *plen. Return number of bytes read, or error.
2685 */
2686int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2687 struct ceph_vino vino, struct ceph_file_layout *layout,
2688 u64 off, u64 *plen,
2689 u32 truncate_seq, u64 truncate_size,
b7495fc2 2690 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2691{
2692 struct ceph_osd_request *req;
2693 int rc = 0;
2694
2695 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2696 vino.snap, off, *plen);
715e4cd4 2697 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 2698 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2699 NULL, truncate_seq, truncate_size,
153e5167 2700 false);
6816282d
SW		 2701 if (IS_ERR(req))
2702 return PTR_ERR(req);
f24e9980
SW		 2703
2704 /* it may be a short read due to an object boundary */
0fff87ec 2705
406e2c9f 2706 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2707 pages, *plen, page_align, false, false);
f24e9980 2708
e0c59487 2709 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2710 off, *plen, *plen, page_align);
f24e9980 2711
79528734 2712 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2713
f24e9980
SW		 2714 rc = ceph_osdc_start_request(osdc, req, false);
2715 if (!rc)
2716 rc = ceph_osdc_wait_request(osdc, req);
2717
2718 ceph_osdc_put_request(req);
2719 dout("readpages result %d\n", rc);
2720 return rc;
2721}
3d14c5d2 2722EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2723
2724/*
2725 * do a synchronous write on N pages
2726 */
2727int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2728 struct ceph_file_layout *layout,
2729 struct ceph_snap_context *snapc,
2730 u64 off, u64 len,
2731 u32 truncate_seq, u64 truncate_size,
2732 struct timespec *mtime,
24808826 2733 struct page **pages, int num_pages)
f24e9980
SW		 2734{
2735 struct ceph_osd_request *req;
2736 int rc = 0;
b7495fc2 2737 int page_align = off & ~PAGE_MASK;
f24e9980 2738
acead002 2739 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
715e4cd4 2740 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
f24e9980 2741 CEPH_OSD_OP_WRITE,
24808826 2742 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2743 snapc, truncate_seq, truncate_size,
153e5167 2744 true);
6816282d
SW		 2745 if (IS_ERR(req))
2746 return PTR_ERR(req);
f24e9980
SW		 2747
2748 /* it may be a short write due to an object boundary */
406e2c9f 2749 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2750 false, false);
2751 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2752
79528734 2753 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2754
87f979d3 2755 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2756 if (!rc)
2757 rc = ceph_osdc_wait_request(osdc, req);
2758
2759 ceph_osdc_put_request(req);
2760 if (rc == 0)
2761 rc = len;
2762 dout("writepages result %d\n", rc);
2763 return rc;
2764}
3d14c5d2 2765EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2766
5522ae0b
AE		 2767int ceph_osdc_setup(void)
2768{
2769 BUG_ON(ceph_osd_request_cache);
2770 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2771 sizeof (struct ceph_osd_request),
2772 __alignof__(struct ceph_osd_request),
2773 0, NULL);
2774
2775 return ceph_osd_request_cache ? 0 : -ENOMEM;
2776}
2777EXPORT_SYMBOL(ceph_osdc_setup);
2778
2779void ceph_osdc_cleanup(void)
2780{
2781 BUG_ON(!ceph_osd_request_cache);
2782 kmem_cache_destroy(ceph_osd_request_cache);
2783 ceph_osd_request_cache = NULL;
2784}
2785EXPORT_SYMBOL(ceph_osdc_cleanup);
2786
f24e9980
SW		 2787/*
2788 * handle incoming message
2789 */
2790static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2791{
2792 struct ceph_osd *osd = con->private;
32c895e7 2793 struct ceph_osd_client *osdc;
f24e9980
SW		 2794 int type = le16_to_cpu(msg->hdr.type);
2795
2796 if (!osd)
4a32f93d 2797 goto out;
32c895e7 2798 osdc = osd->o_osdc;
f24e9980
SW		 2799
2800 switch (type) {
2801 case CEPH_MSG_OSD_MAP:
2802 ceph_osdc_handle_map(osdc, msg);
2803 break;
2804 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2805 handle_reply(osdc, msg, con);
f24e9980 2806 break;
a40c4f10
YS		 2807 case CEPH_MSG_WATCH_NOTIFY:
2808 handle_watch_notify(osdc, msg);
2809 break;
f24e9980
SW		 2810
2811 default:
2812 pr_err("received unknown message type %d %s\n", type,
2813 ceph_msg_type_name(type));
2814 }
4a32f93d 2815out:
f24e9980
SW		 2816 ceph_msg_put(msg);
2817}
2818
5b3a4db3 2819/*
d15f9d69
ID		 2820 * Lookup and return message for incoming reply. Don't try to do
2821 * anything about a larger than preallocated data portion of the
2822 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 2823 */
2824static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2825 struct ceph_msg_header *hdr,
2826 int *skip)
f24e9980
SW		 2827{
2828 struct ceph_osd *osd = con->private;
2829 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2830 struct ceph_msg *m;
0547a9b3 2831 struct ceph_osd_request *req;
3f0a4ac5 2832 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2833 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2834 u64 tid;
f24e9980 2835
0547a9b3
YS		 2836 tid = le64_to_cpu(hdr->tid);
2837 mutex_lock(&osdc->request_mutex);
2838 req = __lookup_request(osdc, tid);
2839 if (!req) {
d15f9d69
ID		 2840 pr_warn("%s osd%d tid %llu unknown, skipping\n",
2841 __func__, osd->o_osd, tid);
0547a9b3 2842 m = NULL;
d15f9d69 2843 *skip = 1;
0547a9b3
YS		 2844 goto out;
2845 }
c16e7869 2846
ace6d3a9 2847 if (req->r_reply->con)
8921d114 2848 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2849 req->r_reply, req->r_reply->con);
2850 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2851
f2be82b0 2852 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 2853 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
2854 __func__, osd->o_osd, req->r_tid, front_len,
2855 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 2856 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2857 false);
a79832f2 2858 if (!m)
c16e7869
SW		 2859 goto out;
2860 ceph_msg_put(req->r_reply);
2861 req->r_reply = m;
2862 }
0fff87ec 2863
d15f9d69
ID		 2864 if (data_len > req->r_reply->data_length) {
2865 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
2866 __func__, osd->o_osd, req->r_tid, data_len,
2867 req->r_reply->data_length);
2868 m = NULL;
2869 *skip = 1;
2870 goto out;
0547a9b3 2871 }
d15f9d69
ID		 2872
2873 m = ceph_msg_get(req->r_reply);
c16e7869 2874 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2875
2876out:
2877 mutex_unlock(&osdc->request_mutex);
2450418c 2878 return m;
5b3a4db3
SW		 2879}
2880
2881static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2882 struct ceph_msg_header *hdr,
2883 int *skip)
2884{
2885 struct ceph_osd *osd = con->private;
2886 int type = le16_to_cpu(hdr->type);
2887 int front = le32_to_cpu(hdr->front_len);
2888
1c20f2d2 2889 *skip = 0;
5b3a4db3
SW		 2890 switch (type) {
2891 case CEPH_MSG_OSD_MAP:
a40c4f10 2892 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2893 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2894 case CEPH_MSG_OSD_OPREPLY:
2895 return get_reply(con, hdr, skip);
2896 default:
2897 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2898 osd->o_osd);
2899 *skip = 1;
2900 return NULL;
2901 }
f24e9980
SW		 2902}
2903
2904/*
2905 * Wrappers to refcount containing ceph_osd struct
2906 */
2907static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2908{
2909 struct ceph_osd *osd = con->private;
2910 if (get_osd(osd))
2911 return con;
2912 return NULL;
2913}
2914
2915static void put_osd_con(struct ceph_connection *con)
2916{
2917 struct ceph_osd *osd = con->private;
2918 put_osd(osd);
2919}
2920
4e7a5dcd
SW		 2921/*
2922 * authentication
2923 */
a3530df3
AE		 2924/*
2925 * Note: returned pointer is the address of a structure that's
2926 * managed separately. Caller must *not* attempt to free it.
2927 */
2928static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2929 int *proto, int force_new)
4e7a5dcd
SW		 2930{
2931 struct ceph_osd *o = con->private;
2932 struct ceph_osd_client *osdc = o->o_osdc;
2933 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2934 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2935
74f1869f 2936 if (force_new && auth->authorizer) {
27859f97 2937 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2938 auth->authorizer = NULL;
2939 }
27859f97
SW		 2940 if (!auth->authorizer) {
2941 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2942 auth);
4e7a5dcd 2943 if (ret)
a3530df3 2944 return ERR_PTR(ret);
27859f97
SW		 2945 } else {
2946 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2947 auth);
2948 if (ret)
2949 return ERR_PTR(ret);
4e7a5dcd 2950 }
4e7a5dcd 2951 *proto = ac->protocol;
74f1869f 2952
a3530df3 2953 return auth;
4e7a5dcd
SW		 2954}
2955
2956
2957static int verify_authorizer_reply(struct ceph_connection *con, int len)
2958{
2959 struct ceph_osd *o = con->private;
2960 struct ceph_osd_client *osdc = o->o_osdc;
2961 struct ceph_auth_client *ac = osdc->client->monc.auth;
2962
27859f97 2963 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2964}
2965
9bd2e6f8
SW		 2966static int invalidate_authorizer(struct ceph_connection *con)
2967{
2968 struct ceph_osd *o = con->private;
2969 struct ceph_osd_client *osdc = o->o_osdc;
2970 struct ceph_auth_client *ac = osdc->client->monc.auth;
2971
27859f97 2972 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2973 return ceph_monc_validate_auth(&osdc->client->monc);
2974}
4e7a5dcd 2975
33d07337
YZ		 2976static int sign_message(struct ceph_connection *con, struct ceph_msg *msg)
2977{
2978 struct ceph_osd *o = con->private;
2979 struct ceph_auth_handshake *auth = &o->o_auth;
2980 return ceph_auth_sign_message(auth, msg);
2981}
2982
2983static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg)
2984{
2985 struct ceph_osd *o = con->private;
2986 struct ceph_auth_handshake *auth = &o->o_auth;
2987 return ceph_auth_check_message_signature(auth, msg);
2988}
2989
9e32789f 2990static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2991 .get = get_osd_con,
2992 .put = put_osd_con,
2993 .dispatch = dispatch,
4e7a5dcd
SW		 2994 .get_authorizer = get_authorizer,
2995 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2996 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2997 .alloc_msg = alloc_msg,
33d07337
YZ		 2998 .sign_message = sign_message,
2999 .check_message_signature = check_message_signature,
81b024e7 3000 .fault = osd_reset,
f24e9980 3001};
Linux 6.x block layer and io_uring tree(s)