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libceph: store session key in cephx authorizer
[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;
295 default:
296 break;
297 }
c54d47bf
AE		 298}
299
f24e9980
SW		 300/*
301 * requests
302 */
9e94af20 303static void ceph_osdc_release_request(struct kref *kref)
f24e9980 304{
9e94af20
ID		 305 struct ceph_osd_request *req = container_of(kref,
306 struct ceph_osd_request, r_kref);
5476492f 307 unsigned int which;
415e49a9 308
9e94af20
ID		 309 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
310 req->r_request, req->r_reply);
6562d661
ID		 311 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
312 WARN_ON(!list_empty(&req->r_req_lru_item));
313 WARN_ON(!list_empty(&req->r_osd_item));
314 WARN_ON(!list_empty(&req->r_linger_item));
315 WARN_ON(!list_empty(&req->r_linger_osd_item));
316 WARN_ON(req->r_osd);
9e94af20 317
415e49a9
SW		 318 if (req->r_request)
319 ceph_msg_put(req->r_request);
ace6d3a9 320 if (req->r_reply) {
8921d114 321 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 322 ceph_msg_put(req->r_reply);
ace6d3a9 323 }
0fff87ec 324
5476492f
AE		 325 for (which = 0; which < req->r_num_ops; which++)
326 osd_req_op_data_release(req, which);
0fff87ec 327
415e49a9
SW		 328 ceph_put_snap_context(req->r_snapc);
329 if (req->r_mempool)
330 mempool_free(req, req->r_osdc->req_mempool);
331 else
5522ae0b
AE		 332 kmem_cache_free(ceph_osd_request_cache, req);
333
f24e9980 334}
9e94af20
ID		 335
336void ceph_osdc_get_request(struct ceph_osd_request *req)
337{
338 dout("%s %p (was %d)\n", __func__, req,
339 atomic_read(&req->r_kref.refcount));
340 kref_get(&req->r_kref);
341}
342EXPORT_SYMBOL(ceph_osdc_get_request);
343
344void ceph_osdc_put_request(struct ceph_osd_request *req)
345{
346 dout("%s %p (was %d)\n", __func__, req,
347 atomic_read(&req->r_kref.refcount));
348 kref_put(&req->r_kref, ceph_osdc_release_request);
349}
350EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 351
3499e8a5 352struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 353 struct ceph_snap_context *snapc,
1b83bef2 354 unsigned int num_ops,
3499e8a5 355 bool use_mempool,
54a54007 356 gfp_t gfp_flags)
f24e9980
SW		 357{
358 struct ceph_osd_request *req;
359 struct ceph_msg *msg;
1b83bef2
SW		 360 size_t msg_size;
361
79528734
AE		 362 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
363 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
364
1b83bef2
SW		 365 msg_size = 4 + 4 + 8 + 8 + 4+8;
366 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
367 msg_size += 1 + 8 + 4 + 4; /* pg_t */
2d0ebc5d 368 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
1b83bef2
SW		 369 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
370 msg_size += 8; /* snapid */
371 msg_size += 8; /* snap_seq */
372 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
373 msg_size += 4;
f24e9980
SW		 374
375 if (use_mempool) {
3499e8a5 376 req = mempool_alloc(osdc->req_mempool, gfp_flags);
f24e9980
SW		 377 memset(req, 0, sizeof(*req));
378 } else {
5522ae0b 379 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
f24e9980
SW		 380 }
381 if (req == NULL)
a79832f2 382 return NULL;
f24e9980 383
f24e9980
SW		 384 req->r_osdc = osdc;
385 req->r_mempool = use_mempool;
79528734 386 req->r_num_ops = num_ops;
68b4476b 387
415e49a9 388 kref_init(&req->r_kref);
f24e9980
SW		 389 init_completion(&req->r_completion);
390 init_completion(&req->r_safe_completion);
a978fa20 391 RB_CLEAR_NODE(&req->r_node);
f24e9980 392 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 393 INIT_LIST_HEAD(&req->r_linger_item);
1d0326b1 394 INIT_LIST_HEAD(&req->r_linger_osd_item);
935b639a 395 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 396 INIT_LIST_HEAD(&req->r_osd_item);
397
3c972c95 398 req->r_base_oloc.pool = -1;
205ee118 399 req->r_target_oloc.pool = -1;
22116525 400
c16e7869
SW		 401 /* create reply message */
402 if (use_mempool)
403 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
404 else
405 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
b61c2763 406 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
a79832f2 407 if (!msg) {
c16e7869 408 ceph_osdc_put_request(req);
a79832f2 409 return NULL;
c16e7869
SW		 410 }
411 req->r_reply = msg;
412
413 /* create request message; allow space for oid */
f24e9980 414 if (use_mempool)
8f3bc053 415 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 416 else
b61c2763 417 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
a79832f2 418 if (!msg) {
f24e9980 419 ceph_osdc_put_request(req);
a79832f2 420 return NULL;
f24e9980 421 }
68b4476b 422
f24e9980 423 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5
YS		 424
425 req->r_request = msg;
3499e8a5
YS		 426
427 return req;
428}
3d14c5d2 429EXPORT_SYMBOL(ceph_osdc_alloc_request);
3499e8a5 430
a8dd0a37 431static bool osd_req_opcode_valid(u16 opcode)
68b4476b 432{
a8dd0a37 433 switch (opcode) {
70b5bfa3
ID		 434#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
435__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
436#undef GENERATE_CASE
a8dd0a37
AE		 437 default:
438 return false;
439 }
440}
441
33803f33
AE		 442/*
443 * This is an osd op init function for opcodes that have no data or
444 * other information associated with them. It also serves as a
445 * common init routine for all the other init functions, below.
446 */
c99d2d4a 447static struct ceph_osd_req_op *
49719778 448_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
c99d2d4a 449 u16 opcode)
33803f33 450{
c99d2d4a
AE		 451 struct ceph_osd_req_op *op;
452
453 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 454 BUG_ON(!osd_req_opcode_valid(opcode));
455
c99d2d4a 456 op = &osd_req->r_ops[which];
33803f33 457 memset(op, 0, sizeof (*op));
33803f33 458 op->op = opcode;
c99d2d4a
AE		 459
460 return op;
33803f33
AE		 461}
462
49719778
AE		 463void osd_req_op_init(struct ceph_osd_request *osd_req,
464 unsigned int which, u16 opcode)
465{
466 (void)_osd_req_op_init(osd_req, which, opcode);
467}
468EXPORT_SYMBOL(osd_req_op_init);
469
c99d2d4a
AE		 470void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
471 unsigned int which, u16 opcode,
33803f33
AE		 472 u64 offset, u64 length,
473 u64 truncate_size, u32 truncate_seq)
474{
49719778 475 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33
AE		 476 size_t payload_len = 0;
477
ad7a60de
LW		 478 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
479 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
480 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 481
33803f33
AE		 482 op->extent.offset = offset;
483 op->extent.length = length;
484 op->extent.truncate_size = truncate_size;
485 op->extent.truncate_seq = truncate_seq;
486 if (opcode == CEPH_OSD_OP_WRITE)
487 payload_len += length;
488
489 op->payload_len = payload_len;
490}
491EXPORT_SYMBOL(osd_req_op_extent_init);
492
c99d2d4a
AE		 493void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
494 unsigned int which, u64 length)
e5975c7c 495{
c99d2d4a
AE		 496 struct ceph_osd_req_op *op;
497 u64 previous;
498
499 BUG_ON(which >= osd_req->r_num_ops);
500 op = &osd_req->r_ops[which];
501 previous = op->extent.length;
e5975c7c
AE		 502
503 if (length == previous)
504 return; /* Nothing to do */
505 BUG_ON(length > previous);
506
507 op->extent.length = length;
508 op->payload_len -= previous - length;
509}
510EXPORT_SYMBOL(osd_req_op_extent_update);
511
c99d2d4a 512void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 513 u16 opcode, const char *class, const char *method)
33803f33 514{
49719778 515 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
5f562df5 516 struct ceph_pagelist *pagelist;
33803f33
AE		 517 size_t payload_len = 0;
518 size_t size;
519
520 BUG_ON(opcode != CEPH_OSD_OP_CALL);
521
5f562df5
AE		 522 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
523 BUG_ON(!pagelist);
524 ceph_pagelist_init(pagelist);
525
33803f33
AE		 526 op->cls.class_name = class;
527 size = strlen(class);
528 BUG_ON(size > (size_t) U8_MAX);
529 op->cls.class_len = size;
5f562df5 530 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 531 payload_len += size;
532
533 op->cls.method_name = method;
534 size = strlen(method);
535 BUG_ON(size > (size_t) U8_MAX);
536 op->cls.method_len = size;
5f562df5 537 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 538 payload_len += size;
539
a4ce40a9 540 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 541
33803f33
AE		 542 op->cls.argc = 0; /* currently unused */
543
544 op->payload_len = payload_len;
545}
546EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 547
c99d2d4a
AE		 548void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
549 unsigned int which, u16 opcode,
33803f33
AE		 550 u64 cookie, u64 version, int flag)
551{
49719778 552 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33 553
c99d2d4a 554 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 555
556 op->watch.cookie = cookie;
9ef1ee5a 557 op->watch.ver = version;
33803f33 558 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 559 op->watch.flag = (u8)1;
33803f33
AE		 560}
561EXPORT_SYMBOL(osd_req_op_watch_init);
562
c647b8a8
ID		 563void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
564 unsigned int which,
565 u64 expected_object_size,
566 u64 expected_write_size)
567{
568 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
569 CEPH_OSD_OP_SETALLOCHINT);
570
571 op->alloc_hint.expected_object_size = expected_object_size;
572 op->alloc_hint.expected_write_size = expected_write_size;
573
574 /*
575 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
576 * not worth a feature bit. Set FAILOK per-op flag to make
577 * sure older osds don't trip over an unsupported opcode.
578 */
579 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
580}
581EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
582
90af3602 583static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 584 struct ceph_osd_data *osd_data)
585{
586 u64 length = ceph_osd_data_length(osd_data);
587
588 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
589 BUG_ON(length > (u64) SIZE_MAX);
590 if (length)
90af3602 591 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 592 length, osd_data->alignment);
593 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
594 BUG_ON(!length);
90af3602 595 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 596#ifdef CONFIG_BLOCK
597 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 598 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 599#endif
600 } else {
601 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
602 }
603}
604
a8dd0a37 605static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 606 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 607{
79528734 608 struct ceph_osd_req_op *src;
04017e29 609 struct ceph_osd_data *osd_data;
54d50649 610 u64 request_data_len = 0;
04017e29 611 u64 data_length;
a8dd0a37 612
79528734
AE		 613 BUG_ON(which >= req->r_num_ops);
614 src = &req->r_ops[which];
a8dd0a37
AE		 615 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
616 pr_err("unrecognized osd opcode %d\n", src->op);
617
618 return 0;
619 }
620
621 switch (src->op) {
622 case CEPH_OSD_OP_STAT:
49719778
AE		 623 osd_data = &src->raw_data_in;
624 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 625 break;
626 case CEPH_OSD_OP_READ:
627 case CEPH_OSD_OP_WRITE:
ad7a60de
LW		 628 case CEPH_OSD_OP_ZERO:
629 case CEPH_OSD_OP_DELETE:
630 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37 631 if (src->op == CEPH_OSD_OP_WRITE)
54d50649 632 request_data_len = src->extent.length;
a8dd0a37
AE		 633 dst->extent.offset = cpu_to_le64(src->extent.offset);
634 dst->extent.length = cpu_to_le64(src->extent.length);
635 dst->extent.truncate_size =
636 cpu_to_le64(src->extent.truncate_size);
637 dst->extent.truncate_seq =
638 cpu_to_le32(src->extent.truncate_seq);
04017e29 639 osd_data = &src->extent.osd_data;
5476492f 640 if (src->op == CEPH_OSD_OP_WRITE)
04017e29 641 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 642 else
04017e29 643 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 644 break;
645 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 646 dst->cls.class_len = src->cls.class_len;
647 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 648 osd_data = &src->cls.request_info;
649 ceph_osdc_msg_data_add(req->r_request, osd_data);
650 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
651 request_data_len = osd_data->pagelist->length;
652
653 osd_data = &src->cls.request_data;
654 data_length = ceph_osd_data_length(osd_data);
655 if (data_length) {
656 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
657 dst->cls.indata_len = cpu_to_le32(data_length);
658 ceph_osdc_msg_data_add(req->r_request, osd_data);
659 src->payload_len += data_length;
660 request_data_len += data_length;
661 }
662 osd_data = &src->cls.response_data;
663 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 664 break;
665 case CEPH_OSD_OP_STARTSYNC:
666 break;
667 case CEPH_OSD_OP_NOTIFY_ACK:
668 case CEPH_OSD_OP_WATCH:
669 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
670 dst->watch.ver = cpu_to_le64(src->watch.ver);
671 dst->watch.flag = src->watch.flag;
672 break;
c647b8a8
ID		 673 case CEPH_OSD_OP_SETALLOCHINT:
674 dst->alloc_hint.expected_object_size =
675 cpu_to_le64(src->alloc_hint.expected_object_size);
676 dst->alloc_hint.expected_write_size =
677 cpu_to_le64(src->alloc_hint.expected_write_size);
678 break;
a8dd0a37 679 default:
4c46459c 680 pr_err("unsupported osd opcode %s\n",
8f63ca2d 681 ceph_osd_op_name(src->op));
4c46459c 682 WARN_ON(1);
a8dd0a37
AE		 683
684 return 0;
68b4476b 685 }
7b25bf5f 686
a8dd0a37 687 dst->op = cpu_to_le16(src->op);
7b25bf5f 688 dst->flags = cpu_to_le32(src->flags);
68b4476b 689 dst->payload_len = cpu_to_le32(src->payload_len);
175face2 690
54d50649 691 return request_data_len;
68b4476b
YS		 692}
693
3499e8a5
YS		 694/*
695 * build new request AND message, calculate layout, and adjust file
696 * extent as needed.
697 *
698 * if the file was recently truncated, we include information about its
699 * old and new size so that the object can be updated appropriately. (we
700 * avoid synchronously deleting truncated objects because it's slow.)
701 *
702 * if @do_sync, include a 'startsync' command so that the osd will flush
703 * data quickly.
704 */
705struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
706 struct ceph_file_layout *layout,
707 struct ceph_vino vino,
acead002 708 u64 off, u64 *plen, int num_ops,
3499e8a5
YS		 709 int opcode, int flags,
710 struct ceph_snap_context *snapc,
3499e8a5
YS		 711 u32 truncate_seq,
712 u64 truncate_size,
153e5167 713 bool use_mempool)
3499e8a5 714{
68b4476b 715 struct ceph_osd_request *req;
75d1c941
AE		 716 u64 objnum = 0;
717 u64 objoff = 0;
718 u64 objlen = 0;
d18d1e28
AE		 719 u32 object_size;
720 u64 object_base;
6816282d 721 int r;
68b4476b 722
ad7a60de
LW		 723 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
724 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
725 opcode != CEPH_OSD_OP_TRUNCATE);
68b4476b 726
acead002 727 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 728 GFP_NOFS);
4ad12621 729 if (!req)
6816282d 730 return ERR_PTR(-ENOMEM);
79528734 731
d178a9e7 732 req->r_flags = flags;
3499e8a5
YS		 733
734 /* calculate max write size */
a19dadfb 735 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 736 if (r < 0) {
737 ceph_osdc_put_request(req);
6816282d 738 return ERR_PTR(r);
3ff5f385 739 }
a19dadfb 740
d18d1e28
AE		 741 object_size = le32_to_cpu(layout->fl_object_size);
742 object_base = off - objoff;
ccca4e37
YZ		 743 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
744 if (truncate_size <= object_base) {
745 truncate_size = 0;
746 } else {
747 truncate_size -= object_base;
748 if (truncate_size > object_size)
749 truncate_size = object_size;
750 }
a19dadfb 751 }
d18d1e28 752
c99d2d4a 753 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
b0270324 754 truncate_size, truncate_seq);
8c042b0d 755
acead002
AE		 756 /*
757 * A second op in the ops array means the caller wants to
758 * also issue a include a 'startsync' command so that the
759 * osd will flush data quickly.
760 */
761 if (num_ops > 1)
c99d2d4a 762 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
d18d1e28 763
3c972c95 764 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
3499e8a5 765
3c972c95 766 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
4295f221 767 "%llx.%08llx", vino.ino, objnum);
3c972c95 768 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
dbe0fc41 769
f24e9980
SW		 770 return req;
771}
3d14c5d2 772EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 773
774/*
775 * We keep osd requests in an rbtree, sorted by ->r_tid.
776 */
777static void __insert_request(struct ceph_osd_client *osdc,
778 struct ceph_osd_request *new)
779{
780 struct rb_node **p = &osdc->requests.rb_node;
781 struct rb_node *parent = NULL;
782 struct ceph_osd_request *req = NULL;
783
784 while (*p) {
785 parent = *p;
786 req = rb_entry(parent, struct ceph_osd_request, r_node);
787 if (new->r_tid < req->r_tid)
788 p = &(*p)->rb_left;
789 else if (new->r_tid > req->r_tid)
790 p = &(*p)->rb_right;
791 else
792 BUG();
793 }
794
795 rb_link_node(&new->r_node, parent, p);
796 rb_insert_color(&new->r_node, &osdc->requests);
797}
798
799static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
800 u64 tid)
801{
802 struct ceph_osd_request *req;
803 struct rb_node *n = osdc->requests.rb_node;
804
805 while (n) {
806 req = rb_entry(n, struct ceph_osd_request, r_node);
807 if (tid < req->r_tid)
808 n = n->rb_left;
809 else if (tid > req->r_tid)
810 n = n->rb_right;
811 else
812 return req;
813 }
814 return NULL;
815}
816
817static struct ceph_osd_request *
818__lookup_request_ge(struct ceph_osd_client *osdc,
819 u64 tid)
820{
821 struct ceph_osd_request *req;
822 struct rb_node *n = osdc->requests.rb_node;
823
824 while (n) {
825 req = rb_entry(n, struct ceph_osd_request, r_node);
826 if (tid < req->r_tid) {
827 if (!n->rb_left)
828 return req;
829 n = n->rb_left;
830 } else if (tid > req->r_tid) {
831 n = n->rb_right;
832 } else {
833 return req;
834 }
835 }
836 return NULL;
837}
838
2cc6128a
ID		 839static void __kick_linger_request(struct ceph_osd_request *req)
840{
841 struct ceph_osd_client *osdc = req->r_osdc;
842 struct ceph_osd *osd = req->r_osd;
843
844 /*
845 * Linger requests need to be resent with a new tid to avoid
846 * the dup op detection logic on the OSDs. Achieve this with
847 * a re-register dance instead of open-coding.
848 */
849 ceph_osdc_get_request(req);
850 if (!list_empty(&req->r_linger_item))
851 __unregister_linger_request(osdc, req);
852 else
853 __unregister_request(osdc, req);
854 __register_request(osdc, req);
855 ceph_osdc_put_request(req);
856
857 /*
858 * Unless request has been registered as both normal and
859 * lingering, __unregister{,_linger}_request clears r_osd.
860 * However, here we need to preserve r_osd to make sure we
861 * requeue on the same OSD.
862 */
863 WARN_ON(req->r_osd || !osd);
864 req->r_osd = osd;
865
866 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
867 __enqueue_request(req);
868}
869
6f6c7006
SW		 870/*
871 * Resubmit requests pending on the given osd.
872 */
873static void __kick_osd_requests(struct ceph_osd_client *osdc,
874 struct ceph_osd *osd)
875{
a40c4f10 876 struct ceph_osd_request *req, *nreq;
e02493c0 877 LIST_HEAD(resend);
2cc6128a 878 LIST_HEAD(resend_linger);
6f6c7006
SW		 879 int err;
880
2cc6128a 881 dout("%s osd%d\n", __func__, osd->o_osd);
6f6c7006 882 err = __reset_osd(osdc, osd);
685a7555 883 if (err)
6f6c7006 884 return;
2cc6128a 885
e02493c0
AE		 886 /*
887 * Build up a list of requests to resend by traversing the
888 * osd's list of requests. Requests for a given object are
889 * sent in tid order, and that is also the order they're
890 * kept on this list. Therefore all requests that are in
891 * flight will be found first, followed by all requests that
892 * have not yet been sent. And to resend requests while
893 * preserving this order we will want to put any sent
894 * requests back on the front of the osd client's unsent
895 * list.
896 *
897 * So we build a separate ordered list of already-sent
898 * requests for the affected osd and splice it onto the
899 * front of the osd client's unsent list. Once we've seen a
900 * request that has not yet been sent we're done. Those
901 * requests are already sitting right where they belong.
902 */
6f6c7006 903 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 904 if (!req->r_sent)
905 break;
2cc6128a
ID		 906
907 if (!req->r_linger) {
908 dout("%s requeueing %p tid %llu\n", __func__, req,
909 req->r_tid);
910 list_move_tail(&req->r_req_lru_item, &resend);
a40c4f10 911 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2cc6128a
ID		 912 } else {
913 list_move_tail(&req->r_req_lru_item, &resend_linger);
914 }
a40c4f10 915 }
e02493c0 916 list_splice(&resend, &osdc->req_unsent);
a40c4f10 917
e02493c0 918 /*
2cc6128a
ID		 919 * Both registered and not yet registered linger requests are
920 * enqueued with a new tid on the same OSD. We add/move them
921 * to req_unsent/o_requests at the end to keep things in tid
922 * order.
e02493c0 923 */
a40c4f10 924 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1d0326b1 925 r_linger_osd_item) {
2cc6128a
ID		 926 WARN_ON(!list_empty(&req->r_req_lru_item));
927 __kick_linger_request(req);
6f6c7006 928 }
2cc6128a
ID		 929
930 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
931 __kick_linger_request(req);
6f6c7006
SW		 932}
933
f24e9980 934/*
81b024e7 935 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 936 */
937static void osd_reset(struct ceph_connection *con)
938{
939 struct ceph_osd *osd = con->private;
940 struct ceph_osd_client *osdc;
941
942 if (!osd)
943 return;
944 dout("osd_reset osd%d\n", osd->o_osd);
945 osdc = osd->o_osdc;
f24e9980 946 down_read(&osdc->map_sem);
83aff95e
SW		 947 mutex_lock(&osdc->request_mutex);
948 __kick_osd_requests(osdc, osd);
f9d25199 949 __send_queued(osdc);
83aff95e 950 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 951 up_read(&osdc->map_sem);
952}
953
954/*
955 * Track open sessions with osds.
956 */
e10006f8 957static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 958{
959 struct ceph_osd *osd;
960
961 osd = kzalloc(sizeof(*osd), GFP_NOFS);
962 if (!osd)
963 return NULL;
964
965 atomic_set(&osd->o_ref, 1);
966 osd->o_osdc = osdc;
e10006f8 967 osd->o_osd = onum;
f407731d 968 RB_CLEAR_NODE(&osd->o_node);
f24e9980 969 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 970 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 971 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 972 osd->o_incarnation = 1;
973
b7a9e5dd 974 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 975
422d2cb8 976 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 977 return osd;
978}
979
980static struct ceph_osd *get_osd(struct ceph_osd *osd)
981{
982 if (atomic_inc_not_zero(&osd->o_ref)) {
983 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
984 atomic_read(&osd->o_ref));
985 return osd;
986 } else {
987 dout("get_osd %p FAIL\n", osd);
988 return NULL;
989 }
990}
991
992static void put_osd(struct ceph_osd *osd)
993{
994 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
995 atomic_read(&osd->o_ref) - 1);
a255651d 996 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
79494d1b
SW		 997 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
998
27859f97 999 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 1000 kfree(osd);
79494d1b 1001 }
f24e9980
SW		 1002}
1003
1004/*
1005 * remove an osd from our map
1006 */
f5a2041b 1007static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1008{
f5a2041b 1009 dout("__remove_osd %p\n", osd);
cc9f1f51
ID		 1010 WARN_ON(!list_empty(&osd->o_requests));
1011 WARN_ON(!list_empty(&osd->o_linger_requests));
7c6e6fc5 1012
f24e9980 1013 rb_erase(&osd->o_node, &osdc->osds);
f5a2041b 1014 list_del_init(&osd->o_osd_lru);
f24e9980
SW		 1015 ceph_con_close(&osd->o_con);
1016 put_osd(osd);
1017}
1018
aca420bc
SW		 1019static void remove_all_osds(struct ceph_osd_client *osdc)
1020{
048a9d2d 1021 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 1022 mutex_lock(&osdc->request_mutex);
1023 while (!RB_EMPTY_ROOT(&osdc->osds)) {
1024 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
1025 struct ceph_osd, o_node);
1026 __remove_osd(osdc, osd);
1027 }
1028 mutex_unlock(&osdc->request_mutex);
1029}
1030
f5a2041b
YS		 1031static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1032 struct ceph_osd *osd)
1033{
bbf37ec3 1034 dout("%s %p\n", __func__, osd);
f5a2041b 1035 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1036
f5a2041b 1037 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
3d14c5d2 1038 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
f5a2041b
YS		 1039}
1040
bbf37ec3
ID		 1041static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1042 struct ceph_osd *osd)
1043{
1044 dout("%s %p\n", __func__, osd);
1045
1046 if (list_empty(&osd->o_requests) &&
1047 list_empty(&osd->o_linger_requests))
1048 __move_osd_to_lru(osdc, osd);
1049}
1050
f5a2041b
YS		 1051static void __remove_osd_from_lru(struct ceph_osd *osd)
1052{
1053 dout("__remove_osd_from_lru %p\n", osd);
1054 if (!list_empty(&osd->o_osd_lru))
1055 list_del_init(&osd->o_osd_lru);
1056}
1057
aca420bc 1058static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1059{
1060 struct ceph_osd *osd, *nosd;
1061
1062 dout("__remove_old_osds %p\n", osdc);
1063 mutex_lock(&osdc->request_mutex);
1064 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1065 if (time_before(jiffies, osd->lru_ttl))
f5a2041b
YS		 1066 break;
1067 __remove_osd(osdc, osd);
1068 }
1069 mutex_unlock(&osdc->request_mutex);
1070}
1071
f24e9980
SW		 1072/*
1073 * reset osd connect
1074 */
f5a2041b 1075static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1076{
c3acb181 1077 struct ceph_entity_addr *peer_addr;
f24e9980 1078
f5a2041b 1079 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1080 if (list_empty(&osd->o_requests) &&
1081 list_empty(&osd->o_linger_requests)) {
f5a2041b 1082 __remove_osd(osdc, osd);
c3acb181
AE		 1083
1084 return -ENODEV;
1085 }
1086
1087 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1088 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1089 !ceph_con_opened(&osd->o_con)) {
1090 struct ceph_osd_request *req;
1091
0b4af2e8
ID		 1092 dout("osd addr hasn't changed and connection never opened, "
1093 "letting msgr retry\n");
87b315a5
SW		 1094 /* touch each r_stamp for handle_timeout()'s benfit */
1095 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1096 req->r_stamp = jiffies;
c3acb181
AE		 1097
1098 return -EAGAIN;
f24e9980 1099 }
c3acb181
AE		 1100
1101 ceph_con_close(&osd->o_con);
1102 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1103 osd->o_incarnation++;
1104
1105 return 0;
f24e9980
SW		 1106}
1107
1108static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1109{
1110 struct rb_node **p = &osdc->osds.rb_node;
1111 struct rb_node *parent = NULL;
1112 struct ceph_osd *osd = NULL;
1113
aca420bc 1114 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1115 while (*p) {
1116 parent = *p;
1117 osd = rb_entry(parent, struct ceph_osd, o_node);
1118 if (new->o_osd < osd->o_osd)
1119 p = &(*p)->rb_left;
1120 else if (new->o_osd > osd->o_osd)
1121 p = &(*p)->rb_right;
1122 else
1123 BUG();
1124 }
1125
1126 rb_link_node(&new->o_node, parent, p);
1127 rb_insert_color(&new->o_node, &osdc->osds);
1128}
1129
1130static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1131{
1132 struct ceph_osd *osd;
1133 struct rb_node *n = osdc->osds.rb_node;
1134
1135 while (n) {
1136 osd = rb_entry(n, struct ceph_osd, o_node);
1137 if (o < osd->o_osd)
1138 n = n->rb_left;
1139 else if (o > osd->o_osd)
1140 n = n->rb_right;
1141 else
1142 return osd;
1143 }
1144 return NULL;
1145}
1146
422d2cb8
YS		 1147static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1148{
1149 schedule_delayed_work(&osdc->timeout_work,
3d14c5d2 1150 osdc->client->options->osd_keepalive_timeout * HZ);
422d2cb8
YS		 1151}
1152
1153static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1154{
1155 cancel_delayed_work(&osdc->timeout_work);
1156}
f24e9980
SW		 1157
1158/*
1159 * Register request, assign tid. If this is the first request, set up
1160 * the timeout event.
1161 */
a40c4f10
YS		 1162static void __register_request(struct ceph_osd_client *osdc,
1163 struct ceph_osd_request *req)
f24e9980 1164{
f24e9980 1165 req->r_tid = ++osdc->last_tid;
6df058c0 1166 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1167 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1168 __insert_request(osdc, req);
1169 ceph_osdc_get_request(req);
1170 osdc->num_requests++;
f24e9980 1171 if (osdc->num_requests == 1) {
422d2cb8
YS		 1172 dout(" first request, scheduling timeout\n");
1173 __schedule_osd_timeout(osdc);
f24e9980 1174 }
a40c4f10
YS		 1175}
1176
f24e9980
SW		 1177/*
1178 * called under osdc->request_mutex
1179 */
1180static void __unregister_request(struct ceph_osd_client *osdc,
1181 struct ceph_osd_request *req)
1182{
35f9f8a0
SW		 1183 if (RB_EMPTY_NODE(&req->r_node)) {
1184 dout("__unregister_request %p tid %lld not registered\n",
1185 req, req->r_tid);
1186 return;
1187 }
1188
f24e9980
SW		 1189 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1190 rb_erase(&req->r_node, &osdc->requests);
6562d661 1191 RB_CLEAR_NODE(&req->r_node);
f24e9980
SW		 1192 osdc->num_requests--;
1193
0ba6478d
SW		 1194 if (req->r_osd) {
1195 /* make sure the original request isn't in flight. */
6740a845 1196 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1197
1198 list_del_init(&req->r_osd_item);
bbf37ec3 1199 maybe_move_osd_to_lru(osdc, req->r_osd);
4f23409e 1200 if (list_empty(&req->r_linger_osd_item))
a40c4f10 1201 req->r_osd = NULL;
0ba6478d 1202 }
f24e9980 1203
7d5f2481 1204 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1205 ceph_osdc_put_request(req);
1206
422d2cb8
YS		 1207 if (osdc->num_requests == 0) {
1208 dout(" no requests, canceling timeout\n");
1209 __cancel_osd_timeout(osdc);
f24e9980
SW		 1210 }
1211}
1212
1213/*
1214 * Cancel a previously queued request message
1215 */
1216static void __cancel_request(struct ceph_osd_request *req)
1217{
6bc18876 1218 if (req->r_sent && req->r_osd) {
6740a845 1219 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1220 req->r_sent = 0;
1221 }
1222}
1223
a40c4f10
YS		 1224static void __register_linger_request(struct ceph_osd_client *osdc,
1225 struct ceph_osd_request *req)
1226{
af593064
ID		 1227 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1228 WARN_ON(!req->r_linger);
1229
96e4dac6 1230 ceph_osdc_get_request(req);
a40c4f10 1231 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89 1232 if (req->r_osd)
1d0326b1 1233 list_add_tail(&req->r_linger_osd_item,
6194ea89 1234 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1235}
1236
1237static void __unregister_linger_request(struct ceph_osd_client *osdc,
1238 struct ceph_osd_request *req)
1239{
af593064
ID		 1240 WARN_ON(!req->r_linger);
1241
1242 if (list_empty(&req->r_linger_item)) {
1243 dout("%s %p tid %llu not registered\n", __func__, req,
1244 req->r_tid);
1245 return;
1246 }
1247
1248 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
61c74035 1249 list_del_init(&req->r_linger_item);
af593064 1250
a40c4f10 1251 if (req->r_osd) {
1d0326b1 1252 list_del_init(&req->r_linger_osd_item);
bbf37ec3 1253 maybe_move_osd_to_lru(osdc, req->r_osd);
fbdb9190
SW		 1254 if (list_empty(&req->r_osd_item))
1255 req->r_osd = NULL;
a40c4f10 1256 }
ba9d114e
ID		 1257
1258 list_del_init(&req->r_req_lru_item); /* can be on notarget */
96e4dac6 1259 ceph_osdc_put_request(req);
a40c4f10
YS		 1260}
1261
a40c4f10
YS		 1262void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1263 struct ceph_osd_request *req)
1264{
1265 if (!req->r_linger) {
1266 dout("set_request_linger %p\n", req);
1267 req->r_linger = 1;
a40c4f10
YS		 1268 }
1269}
1270EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1271
d29adb34
JD		 1272/*
1273 * Returns whether a request should be blocked from being sent
1274 * based on the current osdmap and osd_client settings.
1275 *
1276 * Caller should hold map_sem for read.
1277 */
1278static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1279 struct ceph_osd_request *req)
1280{
1281 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1282 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1283 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1284 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1285 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1286}
1287
17a13e40
ID		 1288/*
1289 * Calculate mapping of a request to a PG. Takes tiering into account.
1290 */
1291static int __calc_request_pg(struct ceph_osdmap *osdmap,
1292 struct ceph_osd_request *req,
1293 struct ceph_pg *pg_out)
1294{
205ee118
ID		 1295 bool need_check_tiering;
1296
1297 need_check_tiering = false;
1298 if (req->r_target_oloc.pool == -1) {
1299 req->r_target_oloc = req->r_base_oloc; /* struct */
1300 need_check_tiering = true;
1301 }
1302 if (req->r_target_oid.name_len == 0) {
1303 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1304 need_check_tiering = true;
1305 }
1306
1307 if (need_check_tiering &&
1308 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
17a13e40
ID		 1309 struct ceph_pg_pool_info *pi;
1310
205ee118 1311 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
17a13e40
ID		 1312 if (pi) {
1313 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1314 pi->read_tier >= 0)
205ee118 1315 req->r_target_oloc.pool = pi->read_tier;
17a13e40
ID		 1316 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1317 pi->write_tier >= 0)
205ee118 1318 req->r_target_oloc.pool = pi->write_tier;
17a13e40
ID		 1319 }
1320 /* !pi is caught in ceph_oloc_oid_to_pg() */
1321 }
1322
205ee118
ID		 1323 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1324 &req->r_target_oid, pg_out);
17a13e40
ID		 1325}
1326
f671b581
ID		 1327static void __enqueue_request(struct ceph_osd_request *req)
1328{
1329 struct ceph_osd_client *osdc = req->r_osdc;
1330
1331 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1332 req->r_osd ? req->r_osd->o_osd : -1);
1333
1334 if (req->r_osd) {
1335 __remove_osd_from_lru(req->r_osd);
1336 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1337 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1338 } else {
1339 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1340 }
1341}
1342
f24e9980
SW		 1343/*
1344 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1345 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1346 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1347 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1348 *
1349 * Return 0 if unchanged, 1 if changed, or negative on error.
1350 *
1351 * Caller should hold map_sem for read and request_mutex.
1352 */
6f6c7006 1353static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1354 struct ceph_osd_request *req, int force_resend)
f24e9980 1355{
5b191d99 1356 struct ceph_pg pgid;
d85b7056 1357 int acting[CEPH_PG_MAX_SIZE];
8008ab10 1358 int num, o;
f24e9980 1359 int err;
d29adb34 1360 bool was_paused;
f24e9980 1361
6f6c7006 1362 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40
ID		 1363
1364 err = __calc_request_pg(osdc->osdmap, req, &pgid);
6f6c7006
SW		 1365 if (err) {
1366 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1367 return err;
6f6c7006 1368 }
7740a42f
SW		 1369 req->r_pgid = pgid;
1370
8008ab10
ID		 1371 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o);
1372 if (num < 0)
1373 num = 0;
f24e9980 1374
d29adb34
JD		 1375 was_paused = req->r_paused;
1376 req->r_paused = __req_should_be_paused(osdc, req);
1377 if (was_paused && !req->r_paused)
1378 force_resend = 1;
1379
38d6453c
SW		 1380 if ((!force_resend &&
1381 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1382 req->r_sent >= req->r_osd->o_incarnation &&
1383 req->r_num_pg_osds == num &&
1384 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
d29adb34
JD		 1385 (req->r_osd == NULL && o == -1) ||
1386 req->r_paused)
f24e9980
SW		 1387 return 0; /* no change */
1388
5b191d99
SW		 1389 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1390 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1391 req->r_osd ? req->r_osd->o_osd : -1);
1392
d85b7056
SW		 1393 /* record full pg acting set */
1394 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1395 req->r_num_pg_osds = num;
1396
f24e9980
SW		 1397 if (req->r_osd) {
1398 __cancel_request(req);
1399 list_del_init(&req->r_osd_item);
a390de02 1400 list_del_init(&req->r_linger_osd_item);
f24e9980
SW		 1401 req->r_osd = NULL;
1402 }
1403
1404 req->r_osd = __lookup_osd(osdc, o);
1405 if (!req->r_osd && o >= 0) {
c99eb1c7 1406 err = -ENOMEM;
e10006f8 1407 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1408 if (!req->r_osd) {
1409 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1410 goto out;
6f6c7006 1411 }
f24e9980 1412
6f6c7006 1413 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1414 __insert_osd(osdc, req->r_osd);
1415
b7a9e5dd
SW		 1416 ceph_con_open(&req->r_osd->o_con,
1417 CEPH_ENTITY_TYPE_OSD, o,
1418 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1419 }
1420
f671b581 1421 __enqueue_request(req);
d85b7056 1422 err = 1; /* osd or pg changed */
f24e9980
SW		 1423
1424out:
f24e9980
SW		 1425 return err;
1426}
1427
1428/*
1429 * caller should hold map_sem (for read) and request_mutex
1430 */
56e925b6
SW		 1431static void __send_request(struct ceph_osd_client *osdc,
1432 struct ceph_osd_request *req)
f24e9980 1433{
1b83bef2 1434 void *p;
f24e9980 1435
1b83bef2
SW		 1436 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1437 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1438 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1439
1440 /* fill in message content that changes each time we send it */
1441 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1442 put_unaligned_le32(req->r_flags, req->r_request_flags);
205ee118 1443 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1b83bef2
SW		 1444 p = req->r_request_pgid;
1445 ceph_encode_64(&p, req->r_pgid.pool);
1446 ceph_encode_32(&p, req->r_pgid.seed);
1447 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1448 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1449 sizeof(req->r_reassert_version));
2169aea6 1450
3dd72fc0 1451 req->r_stamp = jiffies;
07a27e22 1452 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1453
1454 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1455
f24e9980 1456 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1457
1458 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1459}
1460
6f6c7006
SW		 1461/*
1462 * Send any requests in the queue (req_unsent).
1463 */
f9d25199 1464static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1465{
1466 struct ceph_osd_request *req, *tmp;
1467
f9d25199
AE		 1468 dout("__send_queued\n");
1469 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1470 __send_request(osdc, req);
6f6c7006
SW		 1471}
1472
0bbfdfe8
ID		 1473/*
1474 * Caller should hold map_sem for read and request_mutex.
1475 */
1476static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1477 struct ceph_osd_request *req,
1478 bool nofail)
1479{
1480 int rc;
1481
1482 __register_request(osdc, req);
1483 req->r_sent = 0;
1484 req->r_got_reply = 0;
1485 rc = __map_request(osdc, req, 0);
1486 if (rc < 0) {
1487 if (nofail) {
1488 dout("osdc_start_request failed map, "
1489 " will retry %lld\n", req->r_tid);
1490 rc = 0;
1491 } else {
1492 __unregister_request(osdc, req);
1493 }
1494 return rc;
1495 }
1496
1497 if (req->r_osd == NULL) {
1498 dout("send_request %p no up osds in pg\n", req);
1499 ceph_monc_request_next_osdmap(&osdc->client->monc);
1500 } else {
1501 __send_queued(osdc);
1502 }
1503
1504 return 0;
1505}
1506
f24e9980
SW		 1507/*
1508 * Timeout callback, called every N seconds when 1 or more osd
1509 * requests has been active for more than N seconds. When this
1510 * happens, we ping all OSDs with requests who have timed out to
1511 * ensure any communications channel reset is detected. Reset the
1512 * request timeouts another N seconds in the future as we go.
1513 * Reschedule the timeout event another N seconds in future (unless
1514 * there are no open requests).
1515 */
1516static void handle_timeout(struct work_struct *work)
1517{
1518 struct ceph_osd_client *osdc =
1519 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1520 struct ceph_osd_request *req;
f24e9980 1521 struct ceph_osd *osd;
422d2cb8 1522 unsigned long keepalive =
3d14c5d2 1523 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1524 struct list_head slow_osds;
f24e9980
SW		 1525 dout("timeout\n");
1526 down_read(&osdc->map_sem);
1527
1528 ceph_monc_request_next_osdmap(&osdc->client->monc);
1529
1530 mutex_lock(&osdc->request_mutex);
f24e9980 1531
422d2cb8
YS		 1532 /*
1533 * ping osds that are a bit slow. this ensures that if there
1534 * is a break in the TCP connection we will notice, and reopen
1535 * a connection with that osd (from the fault callback).
1536 */
1537 INIT_LIST_HEAD(&slow_osds);
1538 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1539 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1540 break;
1541
1542 osd = req->r_osd;
1543 BUG_ON(!osd);
1544 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1545 req->r_tid, osd->o_osd);
422d2cb8
YS		 1546 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1547 }
1548 while (!list_empty(&slow_osds)) {
1549 osd = list_entry(slow_osds.next, struct ceph_osd,
1550 o_keepalive_item);
1551 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1552 ceph_con_keepalive(&osd->o_con);
1553 }
1554
422d2cb8 1555 __schedule_osd_timeout(osdc);
f9d25199 1556 __send_queued(osdc);
f24e9980 1557 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1558 up_read(&osdc->map_sem);
1559}
1560
f5a2041b
YS		 1561static void handle_osds_timeout(struct work_struct *work)
1562{
1563 struct ceph_osd_client *osdc =
1564 container_of(work, struct ceph_osd_client,
1565 osds_timeout_work.work);
1566 unsigned long delay =
3d14c5d2 1567 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1568
1569 dout("osds timeout\n");
1570 down_read(&osdc->map_sem);
aca420bc 1571 remove_old_osds(osdc);
f5a2041b
YS		 1572 up_read(&osdc->map_sem);
1573
1574 schedule_delayed_work(&osdc->osds_timeout_work,
1575 round_jiffies_relative(delay));
1576}
1577
205ee118
ID		 1578static int ceph_oloc_decode(void **p, void *end,
1579 struct ceph_object_locator *oloc)
1580{
1581 u8 struct_v, struct_cv;
1582 u32 len;
1583 void *struct_end;
1584 int ret = 0;
1585
1586 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1587 struct_v = ceph_decode_8(p);
1588 struct_cv = ceph_decode_8(p);
1589 if (struct_v < 3) {
1590 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1591 struct_v, struct_cv);
1592 goto e_inval;
1593 }
1594 if (struct_cv > 6) {
1595 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1596 struct_v, struct_cv);
1597 goto e_inval;
1598 }
1599 len = ceph_decode_32(p);
1600 ceph_decode_need(p, end, len, e_inval);
1601 struct_end = *p + len;
1602
1603 oloc->pool = ceph_decode_64(p);
1604 *p += 4; /* skip preferred */
1605
1606 len = ceph_decode_32(p);
1607 if (len > 0) {
1608 pr_warn("ceph_object_locator::key is set\n");
1609 goto e_inval;
1610 }
1611
1612 if (struct_v >= 5) {
1613 len = ceph_decode_32(p);
1614 if (len > 0) {
1615 pr_warn("ceph_object_locator::nspace is set\n");
1616 goto e_inval;
1617 }
1618 }
1619
1620 if (struct_v >= 6) {
1621 s64 hash = ceph_decode_64(p);
1622 if (hash != -1) {
1623 pr_warn("ceph_object_locator::hash is set\n");
1624 goto e_inval;
1625 }
1626 }
1627
1628 /* skip the rest */
1629 *p = struct_end;
1630out:
1631 return ret;
1632
1633e_inval:
1634 ret = -EINVAL;
1635 goto out;
1636}
1637
1638static int ceph_redirect_decode(void **p, void *end,
1639 struct ceph_request_redirect *redir)
1640{
1641 u8 struct_v, struct_cv;
1642 u32 len;
1643 void *struct_end;
1644 int ret;
1645
1646 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1647 struct_v = ceph_decode_8(p);
1648 struct_cv = ceph_decode_8(p);
1649 if (struct_cv > 1) {
1650 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1651 struct_v, struct_cv);
1652 goto e_inval;
1653 }
1654 len = ceph_decode_32(p);
1655 ceph_decode_need(p, end, len, e_inval);
1656 struct_end = *p + len;
1657
1658 ret = ceph_oloc_decode(p, end, &redir->oloc);
1659 if (ret)
1660 goto out;
1661
1662 len = ceph_decode_32(p);
1663 if (len > 0) {
1664 pr_warn("ceph_request_redirect::object_name is set\n");
1665 goto e_inval;
1666 }
1667
1668 len = ceph_decode_32(p);
1669 *p += len; /* skip osd_instructions */
1670
1671 /* skip the rest */
1672 *p = struct_end;
1673out:
1674 return ret;
1675
1676e_inval:
1677 ret = -EINVAL;
1678 goto out;
1679}
1680
25845472
SW		 1681static void complete_request(struct ceph_osd_request *req)
1682{
25845472
SW		 1683 complete_all(&req->r_safe_completion); /* fsync waiter */
1684}
1685
f24e9980
SW		 1686/*
1687 * handle osd op reply. either call the callback if it is specified,
1688 * or do the completion to wake up the waiting thread.
1689 */
350b1c32
SW		 1690static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1691 struct ceph_connection *con)
f24e9980 1692{
1b83bef2 1693 void *p, *end;
f24e9980 1694 struct ceph_osd_request *req;
205ee118 1695 struct ceph_request_redirect redir;
f24e9980 1696 u64 tid;
1b83bef2 1697 int object_len;
79528734
AE		 1698 unsigned int numops;
1699 int payload_len, flags;
0ceed5db 1700 s32 result;
1b83bef2
SW		 1701 s32 retry_attempt;
1702 struct ceph_pg pg;
1703 int err;
1704 u32 reassert_epoch;
1705 u64 reassert_version;
1706 u32 osdmap_epoch;
0d5af164 1707 int already_completed;
9fc6e064 1708 u32 bytes;
79528734 1709 unsigned int i;
f24e9980 1710
6df058c0 1711 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1712 dout("handle_reply %p tid %llu\n", msg, tid);
1713
1714 p = msg->front.iov_base;
1715 end = p + msg->front.iov_len;
1716
1717 ceph_decode_need(&p, end, 4, bad);
1718 object_len = ceph_decode_32(&p);
1719 ceph_decode_need(&p, end, object_len, bad);
1720 p += object_len;
1721
ef4859d6 1722 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1723 if (err)
f24e9980 1724 goto bad;
1b83bef2
SW		 1725
1726 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1727 flags = ceph_decode_64(&p);
1728 result = ceph_decode_32(&p);
1729 reassert_epoch = ceph_decode_32(&p);
1730 reassert_version = ceph_decode_64(&p);
1731 osdmap_epoch = ceph_decode_32(&p);
1732
f24e9980 1733 /* lookup */
ff513ace 1734 down_read(&osdc->map_sem);
f24e9980
SW		 1735 mutex_lock(&osdc->request_mutex);
1736 req = __lookup_request(osdc, tid);
1737 if (req == NULL) {
1738 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1739 goto bad_mutex;
f24e9980
SW		 1740 }
1741 ceph_osdc_get_request(req);
1b83bef2
SW		 1742
1743 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1744 req, result);
1745
18741196 1746 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2
SW		 1747 numops = ceph_decode_32(&p);
1748 if (numops > CEPH_OSD_MAX_OP)
1749 goto bad_put;
1750 if (numops != req->r_num_ops)
1751 goto bad_put;
1752 payload_len = 0;
18741196 1753 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1754 for (i = 0; i < numops; i++) {
1755 struct ceph_osd_op *op = p;
1756 int len;
1757
1758 len = le32_to_cpu(op->payload_len);
1759 req->r_reply_op_len[i] = len;
1760 dout(" op %d has %d bytes\n", i, len);
1761 payload_len += len;
1762 p += sizeof(*op);
1763 }
9fc6e064
AE		 1764 bytes = le32_to_cpu(msg->hdr.data_len);
1765 if (payload_len != bytes) {
b9a67899
JP		 1766 pr_warn("sum of op payload lens %d != data_len %d\n",
1767 payload_len, bytes);
1b83bef2
SW		 1768 goto bad_put;
1769 }
1770
18741196 1771 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1772 retry_attempt = ceph_decode_32(&p);
1773 for (i = 0; i < numops; i++)
1774 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1775
205ee118
ID		 1776 if (le16_to_cpu(msg->hdr.version) >= 6) {
1777 p += 8 + 4; /* skip replay_version */
1778 p += 8; /* skip user_version */
eb845ff1 1779
205ee118
ID		 1780 err = ceph_redirect_decode(&p, end, &redir);
1781 if (err)
1782 goto bad_put;
1783 } else {
1784 redir.oloc.pool = -1;
1785 }
f24e9980 1786
205ee118
ID		 1787 if (redir.oloc.pool != -1) {
1788 dout("redirect pool %lld\n", redir.oloc.pool);
1789
1790 __unregister_request(osdc, req);
205ee118
ID		 1791
1792 req->r_target_oloc = redir.oloc; /* struct */
1793
1794 /*
1795 * Start redirect requests with nofail=true. If
1796 * mapping fails, request will end up on the notarget
1797 * list, waiting for the new osdmap (which can take
1798 * a while), even though the original request mapped
1799 * successfully. In the future we might want to follow
1800 * original request's nofail setting here.
1801 */
ff513ace 1802 err = __ceph_osdc_start_request(osdc, req, true);
205ee118
ID		 1803 BUG_ON(err);
1804
ff513ace 1805 goto out_unlock;
205ee118
ID		 1806 }
1807
1808 already_completed = req->r_got_reply;
1809 if (!req->r_got_reply) {
1b83bef2 1810 req->r_result = result;
f24e9980
SW		 1811 dout("handle_reply result %d bytes %d\n", req->r_result,
1812 bytes);
1813 if (req->r_result == 0)
1814 req->r_result = bytes;
1815
1816 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1817 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1818 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1819
1820 req->r_got_reply = 1;
1821 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1822 dout("handle_reply tid %llu dup ack\n", tid);
ff513ace 1823 goto out_unlock;
f24e9980
SW		 1824 }
1825
1826 dout("handle_reply tid %llu flags %d\n", tid, flags);
1827
a40c4f10
YS		 1828 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1829 __register_linger_request(osdc, req);
1830
f24e9980 1831 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1832 if (result < 0 ||
1833 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1834 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1835 __unregister_request(osdc, req);
1836
1837 mutex_unlock(&osdc->request_mutex);
ff513ace 1838 up_read(&osdc->map_sem);
f24e9980 1839
eb845ff1 1840 if (!already_completed) {
61c5d6bf
YZ		 1841 if (req->r_unsafe_callback &&
1842 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1843 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1844 if (req->r_callback)
1845 req->r_callback(req, msg);
1846 else
1847 complete_all(&req->r_completion);
1848 }
f24e9980 1849
61c5d6bf
YZ		 1850 if (flags & CEPH_OSD_FLAG_ONDISK) {
1851 if (req->r_unsafe_callback && already_completed)
1852 req->r_unsafe_callback(req, false);
25845472 1853 complete_request(req);
61c5d6bf 1854 }
f24e9980 1855
ff513ace 1856out:
a40c4f10 1857 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1858 ceph_osdc_put_request(req);
1859 return;
ff513ace
ID		 1860out_unlock:
1861 mutex_unlock(&osdc->request_mutex);
1862 up_read(&osdc->map_sem);
1863 goto out;
f24e9980 1864
1b83bef2 1865bad_put:
37c89bde
LW		 1866 req->r_result = -EIO;
1867 __unregister_request(osdc, req);
1868 if (req->r_callback)
1869 req->r_callback(req, msg);
1870 else
1871 complete_all(&req->r_completion);
1872 complete_request(req);
1b83bef2 1873 ceph_osdc_put_request(req);
8058fd45
AE		 1874bad_mutex:
1875 mutex_unlock(&osdc->request_mutex);
ff513ace 1876 up_read(&osdc->map_sem);
f24e9980 1877bad:
1b83bef2
SW		 1878 pr_err("corrupt osd_op_reply got %d %d\n",
1879 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1880 ceph_msg_dump(msg);
f24e9980
SW		 1881}
1882
6f6c7006 1883static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1884{
f24e9980 1885 struct rb_node *p, *n;
f24e9980 1886
6f6c7006
SW		 1887 for (p = rb_first(&osdc->osds); p; p = n) {
1888 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1889
6f6c7006
SW		 1890 n = rb_next(p);
1891 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1892 memcmp(&osd->o_con.peer_addr,
1893 ceph_osd_addr(osdc->osdmap,
1894 osd->o_osd),
1895 sizeof(struct ceph_entity_addr)) != 0)
1896 __reset_osd(osdc, osd);
f24e9980 1897 }
422d2cb8
YS		 1898}
1899
1900/*
6f6c7006
SW		 1901 * Requeue requests whose mapping to an OSD has changed. If requests map to
1902 * no osd, request a new map.
422d2cb8 1903 *
e6d50f67 1904 * Caller should hold map_sem for read.
422d2cb8 1905 */
9a1ea2db
JD		 1906static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1907 bool force_resend_writes)
422d2cb8 1908{
a40c4f10 1909 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1910 struct rb_node *p;
1911 int needmap = 0;
1912 int err;
9a1ea2db 1913 bool force_resend_req;
422d2cb8 1914
9a1ea2db
JD		 1915 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1916 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1917 mutex_lock(&osdc->request_mutex);
6194ea89 1918 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1919 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1920 p = rb_next(p);
ab60b16d
AE		 1921
1922 /*
1923 * For linger requests that have not yet been
1924 * registered, move them to the linger list; they'll
1925 * be sent to the osd in the loop below. Unregister
1926 * the request before re-registering it as a linger
1927 * request to ensure the __map_request() below
1928 * will decide it needs to be sent.
1929 */
1930 if (req->r_linger && list_empty(&req->r_linger_item)) {
1931 dout("%p tid %llu restart on osd%d\n",
1932 req, req->r_tid,
1933 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 1934 ceph_osdc_get_request(req);
ab60b16d
AE		 1935 __unregister_request(osdc, req);
1936 __register_linger_request(osdc, req);
96e4dac6 1937 ceph_osdc_put_request(req);
ab60b16d
AE		 1938 continue;
1939 }
1940
9a1ea2db
JD		 1941 force_resend_req = force_resend ||
1942 (force_resend_writes &&
1943 req->r_flags & CEPH_OSD_FLAG_WRITE);
1944 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 1945 if (err < 0)
1946 continue; /* error */
1947 if (req->r_osd == NULL) {
1948 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1949 needmap++; /* request a newer map */
1950 } else if (err > 0) {
6194ea89
SW		 1951 if (!req->r_linger) {
1952 dout("%p tid %llu requeued on osd%d\n", req,
1953 req->r_tid,
1954 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1955 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1956 }
1957 }
a40c4f10
YS		 1958 }
1959
1960 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1961 r_linger_item) {
1962 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1963
9a1ea2db
JD		 1964 err = __map_request(osdc, req,
1965 force_resend || force_resend_writes);
ab60b16d 1966 dout("__map_request returned %d\n", err);
a40c4f10
YS		 1967 if (err == 0)
1968 continue; /* no change and no osd was specified */
1969 if (err < 0)
1970 continue; /* hrm! */
1971 if (req->r_osd == NULL) {
1972 dout("tid %llu maps to no valid osd\n", req->r_tid);
1973 needmap++; /* request a newer map */
1974 continue;
6f6c7006 1975 }
a40c4f10
YS		 1976
1977 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1978 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1979 __register_request(osdc, req);
c89ce05e 1980 __unregister_linger_request(osdc, req);
6f6c7006 1981 }
14d2f38d 1982 reset_changed_osds(osdc);
f24e9980
SW		 1983 mutex_unlock(&osdc->request_mutex);
1984
1985 if (needmap) {
1986 dout("%d requests for down osds, need new map\n", needmap);
1987 ceph_monc_request_next_osdmap(&osdc->client->monc);
1988 }
422d2cb8 1989}
6f6c7006
SW		 1990
1991
f24e9980
SW		 1992/*
1993 * Process updated osd map.
1994 *
1995 * The message contains any number of incremental and full maps, normally
1996 * indicating some sort of topology change in the cluster. Kick requests
1997 * off to different OSDs as needed.
1998 */
1999void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2000{
2001 void *p, *end, *next;
2002 u32 nr_maps, maplen;
2003 u32 epoch;
2004 struct ceph_osdmap *newmap = NULL, *oldmap;
2005 int err;
2006 struct ceph_fsid fsid;
9a1ea2db 2007 bool was_full;
f24e9980
SW		 2008
2009 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2010 p = msg->front.iov_base;
2011 end = p + msg->front.iov_len;
2012
2013 /* verify fsid */
2014 ceph_decode_need(&p, end, sizeof(fsid), bad);
2015 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 2016 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2017 return;
f24e9980
SW		 2018
2019 down_write(&osdc->map_sem);
2020
9a1ea2db
JD		 2021 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2022
f24e9980
SW		 2023 /* incremental maps */
2024 ceph_decode_32_safe(&p, end, nr_maps, bad);
2025 dout(" %d inc maps\n", nr_maps);
2026 while (nr_maps > 0) {
2027 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2028 epoch = ceph_decode_32(&p);
2029 maplen = ceph_decode_32(&p);
f24e9980
SW		 2030 ceph_decode_need(&p, end, maplen, bad);
2031 next = p + maplen;
2032 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2033 dout("applying incremental map %u len %d\n",
2034 epoch, maplen);
2035 newmap = osdmap_apply_incremental(&p, next,
2036 osdc->osdmap,
15d9882c 2037 &osdc->client->msgr);
f24e9980
SW		 2038 if (IS_ERR(newmap)) {
2039 err = PTR_ERR(newmap);
2040 goto bad;
2041 }
30dc6381 2042 BUG_ON(!newmap);
f24e9980
SW		 2043 if (newmap != osdc->osdmap) {
2044 ceph_osdmap_destroy(osdc->osdmap);
2045 osdc->osdmap = newmap;
2046 }
9a1ea2db
JD		 2047 was_full = was_full ||
2048 ceph_osdmap_flag(osdc->osdmap,
2049 CEPH_OSDMAP_FULL);
2050 kick_requests(osdc, 0, was_full);
f24e9980
SW		 2051 } else {
2052 dout("ignoring incremental map %u len %d\n",
2053 epoch, maplen);
2054 }
2055 p = next;
2056 nr_maps--;
2057 }
2058 if (newmap)
2059 goto done;
2060
2061 /* full maps */
2062 ceph_decode_32_safe(&p, end, nr_maps, bad);
2063 dout(" %d full maps\n", nr_maps);
2064 while (nr_maps) {
2065 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2066 epoch = ceph_decode_32(&p);
2067 maplen = ceph_decode_32(&p);
f24e9980
SW		 2068 ceph_decode_need(&p, end, maplen, bad);
2069 if (nr_maps > 1) {
2070 dout("skipping non-latest full map %u len %d\n",
2071 epoch, maplen);
2072 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2073 dout("skipping full map %u len %d, "
2074 "older than our %u\n", epoch, maplen,
2075 osdc->osdmap->epoch);
2076 } else {
38d6453c
SW		 2077 int skipped_map = 0;
2078
f24e9980 2079 dout("taking full map %u len %d\n", epoch, maplen);
a2505d63 2080 newmap = ceph_osdmap_decode(&p, p+maplen);
f24e9980
SW		 2081 if (IS_ERR(newmap)) {
2082 err = PTR_ERR(newmap);
2083 goto bad;
2084 }
30dc6381 2085 BUG_ON(!newmap);
f24e9980
SW		 2086 oldmap = osdc->osdmap;
2087 osdc->osdmap = newmap;
38d6453c
SW		 2088 if (oldmap) {
2089 if (oldmap->epoch + 1 < newmap->epoch)
2090 skipped_map = 1;
f24e9980 2091 ceph_osdmap_destroy(oldmap);
38d6453c 2092 }
9a1ea2db
JD		 2093 was_full = was_full ||
2094 ceph_osdmap_flag(osdc->osdmap,
2095 CEPH_OSDMAP_FULL);
2096 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2097 }
2098 p += maplen;
2099 nr_maps--;
2100 }
2101
b72e19b9
DC		 2102 if (!osdc->osdmap)
2103 goto bad;
f24e9980
SW		 2104done:
2105 downgrade_write(&osdc->map_sem);
2106 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 2107
2108 /*
2109 * subscribe to subsequent osdmap updates if full to ensure
2110 * we find out when we are no longer full and stop returning
2111 * ENOSPC.
2112 */
d29adb34
JD		 2113 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2114 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2115 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2116 ceph_monc_request_next_osdmap(&osdc->client->monc);
2117
f9d25199
AE		 2118 mutex_lock(&osdc->request_mutex);
2119 __send_queued(osdc);
2120 mutex_unlock(&osdc->request_mutex);
f24e9980 2121 up_read(&osdc->map_sem);
03066f23 2122 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2123 return;
2124
2125bad:
2126 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2127 ceph_msg_dump(msg);
f24e9980 2128 up_write(&osdc->map_sem);
f24e9980
SW		 2129}
2130
a40c4f10
YS		 2131/*
2132 * watch/notify callback event infrastructure
2133 *
2134 * These callbacks are used both for watch and notify operations.
2135 */
2136static void __release_event(struct kref *kref)
2137{
2138 struct ceph_osd_event *event =
2139 container_of(kref, struct ceph_osd_event, kref);
2140
2141 dout("__release_event %p\n", event);
2142 kfree(event);
2143}
2144
2145static void get_event(struct ceph_osd_event *event)
2146{
2147 kref_get(&event->kref);
2148}
2149
2150void ceph_osdc_put_event(struct ceph_osd_event *event)
2151{
2152 kref_put(&event->kref, __release_event);
2153}
2154EXPORT_SYMBOL(ceph_osdc_put_event);
2155
2156static void __insert_event(struct ceph_osd_client *osdc,
2157 struct ceph_osd_event *new)
2158{
2159 struct rb_node **p = &osdc->event_tree.rb_node;
2160 struct rb_node *parent = NULL;
2161 struct ceph_osd_event *event = NULL;
2162
2163 while (*p) {
2164 parent = *p;
2165 event = rb_entry(parent, struct ceph_osd_event, node);
2166 if (new->cookie < event->cookie)
2167 p = &(*p)->rb_left;
2168 else if (new->cookie > event->cookie)
2169 p = &(*p)->rb_right;
2170 else
2171 BUG();
2172 }
2173
2174 rb_link_node(&new->node, parent, p);
2175 rb_insert_color(&new->node, &osdc->event_tree);
2176}
2177
2178static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2179 u64 cookie)
2180{
2181 struct rb_node **p = &osdc->event_tree.rb_node;
2182 struct rb_node *parent = NULL;
2183 struct ceph_osd_event *event = NULL;
2184
2185 while (*p) {
2186 parent = *p;
2187 event = rb_entry(parent, struct ceph_osd_event, node);
2188 if (cookie < event->cookie)
2189 p = &(*p)->rb_left;
2190 else if (cookie > event->cookie)
2191 p = &(*p)->rb_right;
2192 else
2193 return event;
2194 }
2195 return NULL;
2196}
2197
2198static void __remove_event(struct ceph_osd_event *event)
2199{
2200 struct ceph_osd_client *osdc = event->osdc;
2201
2202 if (!RB_EMPTY_NODE(&event->node)) {
2203 dout("__remove_event removed %p\n", event);
2204 rb_erase(&event->node, &osdc->event_tree);
2205 ceph_osdc_put_event(event);
2206 } else {
2207 dout("__remove_event didn't remove %p\n", event);
2208 }
2209}
2210
2211int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2212 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2213 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2214{
2215 struct ceph_osd_event *event;
2216
2217 event = kmalloc(sizeof(*event), GFP_NOIO);
2218 if (!event)
2219 return -ENOMEM;
2220
2221 dout("create_event %p\n", event);
2222 event->cb = event_cb;
3c663bbd 2223 event->one_shot = 0;
a40c4f10
YS		 2224 event->data = data;
2225 event->osdc = osdc;
2226 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2227 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2228 kref_init(&event->kref); /* one ref for us */
2229 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2230
2231 spin_lock(&osdc->event_lock);
2232 event->cookie = ++osdc->event_count;
2233 __insert_event(osdc, event);
2234 spin_unlock(&osdc->event_lock);
2235
2236 *pevent = event;
2237 return 0;
2238}
2239EXPORT_SYMBOL(ceph_osdc_create_event);
2240
2241void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2242{
2243 struct ceph_osd_client *osdc = event->osdc;
2244
2245 dout("cancel_event %p\n", event);
2246 spin_lock(&osdc->event_lock);
2247 __remove_event(event);
2248 spin_unlock(&osdc->event_lock);
2249 ceph_osdc_put_event(event); /* caller's */
2250}
2251EXPORT_SYMBOL(ceph_osdc_cancel_event);
2252
2253
2254static void do_event_work(struct work_struct *work)
2255{
2256 struct ceph_osd_event_work *event_work =
2257 container_of(work, struct ceph_osd_event_work, work);
2258 struct ceph_osd_event *event = event_work->event;
2259 u64 ver = event_work->ver;
2260 u64 notify_id = event_work->notify_id;
2261 u8 opcode = event_work->opcode;
2262
2263 dout("do_event_work completing %p\n", event);
2264 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2265 dout("do_event_work completed %p\n", event);
2266 ceph_osdc_put_event(event);
2267 kfree(event_work);
2268}
2269
2270
2271/*
2272 * Process osd watch notifications
2273 */
3c663bbd
AE		 2274static void handle_watch_notify(struct ceph_osd_client *osdc,
2275 struct ceph_msg *msg)
a40c4f10
YS		 2276{
2277 void *p, *end;
2278 u8 proto_ver;
2279 u64 cookie, ver, notify_id;
2280 u8 opcode;
2281 struct ceph_osd_event *event;
2282 struct ceph_osd_event_work *event_work;
2283
2284 p = msg->front.iov_base;
2285 end = p + msg->front.iov_len;
2286
2287 ceph_decode_8_safe(&p, end, proto_ver, bad);
2288 ceph_decode_8_safe(&p, end, opcode, bad);
2289 ceph_decode_64_safe(&p, end, cookie, bad);
2290 ceph_decode_64_safe(&p, end, ver, bad);
2291 ceph_decode_64_safe(&p, end, notify_id, bad);
2292
2293 spin_lock(&osdc->event_lock);
2294 event = __find_event(osdc, cookie);
2295 if (event) {
3c663bbd 2296 BUG_ON(event->one_shot);
a40c4f10 2297 get_event(event);
a40c4f10
YS		 2298 }
2299 spin_unlock(&osdc->event_lock);
2300 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2301 cookie, ver, event);
2302 if (event) {
2303 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10 2304 if (!event_work) {
91883cd2
ID		 2305 pr_err("couldn't allocate event_work\n");
2306 ceph_osdc_put_event(event);
2307 return;
a40c4f10 2308 }
6b0ae409 2309 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2310 event_work->event = event;
2311 event_work->ver = ver;
2312 event_work->notify_id = notify_id;
2313 event_work->opcode = opcode;
a40c4f10 2314
91883cd2
ID		 2315 queue_work(osdc->notify_wq, &event_work->work);
2316 }
a40c4f10 2317
a40c4f10
YS		 2318 return;
2319
2320bad:
2321 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 2322}
2323
e65550fd
AE		 2324/*
2325 * build new request AND message
2326 *
2327 */
2328void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2329 struct ceph_snap_context *snapc, u64 snap_id,
2330 struct timespec *mtime)
2331{
2332 struct ceph_msg *msg = req->r_request;
2333 void *p;
2334 size_t msg_size;
2335 int flags = req->r_flags;
2336 u64 data_len;
2337 unsigned int i;
2338
2339 req->r_snapid = snap_id;
2340 req->r_snapc = ceph_get_snap_context(snapc);
2341
2342 /* encode request */
2343 msg->hdr.version = cpu_to_le16(4);
2344
2345 p = msg->front.iov_base;
2346 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2347 req->r_request_osdmap_epoch = p;
2348 p += 4;
2349 req->r_request_flags = p;
2350 p += 4;
2351 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2352 ceph_encode_timespec(p, mtime);
2353 p += sizeof(struct ceph_timespec);
2354 req->r_request_reassert_version = p;
2355 p += sizeof(struct ceph_eversion); /* will get filled in */
2356
2357 /* oloc */
2358 ceph_encode_8(&p, 4);
2359 ceph_encode_8(&p, 4);
2360 ceph_encode_32(&p, 8 + 4 + 4);
2361 req->r_request_pool = p;
2362 p += 8;
2363 ceph_encode_32(&p, -1); /* preferred */
2364 ceph_encode_32(&p, 0); /* key len */
2365
2366 ceph_encode_8(&p, 1);
2367 req->r_request_pgid = p;
2368 p += 8 + 4;
2369 ceph_encode_32(&p, -1); /* preferred */
2370
2371 /* oid */
3c972c95
ID		 2372 ceph_encode_32(&p, req->r_base_oid.name_len);
2373 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2374 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2375 req->r_base_oid.name, req->r_base_oid.name_len);
2376 p += req->r_base_oid.name_len;
e65550fd
AE		 2377
2378 /* ops--can imply data */
2379 ceph_encode_16(&p, (u16)req->r_num_ops);
2380 data_len = 0;
2381 for (i = 0; i < req->r_num_ops; i++) {
2382 data_len += osd_req_encode_op(req, p, i);
2383 p += sizeof(struct ceph_osd_op);
2384 }
2385
2386 /* snaps */
2387 ceph_encode_64(&p, req->r_snapid);
2388 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2389 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2390 if (req->r_snapc) {
2391 for (i = 0; i < snapc->num_snaps; i++) {
2392 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2393 }
2394 }
2395
2396 req->r_request_attempts = p;
2397 p += 4;
2398
2399 /* data */
2400 if (flags & CEPH_OSD_FLAG_WRITE) {
2401 u16 data_off;
2402
2403 /*
2404 * The header "data_off" is a hint to the receiver
2405 * allowing it to align received data into its
2406 * buffers such that there's no need to re-copy
2407 * it before writing it to disk (direct I/O).
2408 */
2409 data_off = (u16) (off & 0xffff);
2410 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2411 }
2412 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2413
2414 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2415 msg_size = p - msg->front.iov_base;
2416 msg->front.iov_len = msg_size;
2417 msg->hdr.front_len = cpu_to_le32(msg_size);
2418
2419 dout("build_request msg_size was %d\n", (int)msg_size);
2420}
2421EXPORT_SYMBOL(ceph_osdc_build_request);
2422
70636773
AE		 2423/*
2424 * Register request, send initial attempt.
2425 */
2426int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2427 struct ceph_osd_request *req,
2428 bool nofail)
2429{
0bbfdfe8 2430 int rc;
70636773 2431
f24e9980
SW		 2432 down_read(&osdc->map_sem);
2433 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2434
2435 rc = __ceph_osdc_start_request(osdc, req, nofail);
2436
f24e9980
SW		 2437 mutex_unlock(&osdc->request_mutex);
2438 up_read(&osdc->map_sem);
0bbfdfe8 2439
f24e9980
SW		 2440 return rc;
2441}
3d14c5d2 2442EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 2443
c9f9b93d
ID		 2444/*
2445 * Unregister a registered request. The request is not completed (i.e.
2446 * no callbacks or wakeups) - higher layers are supposed to know what
2447 * they are canceling.
2448 */
2449void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2450{
2451 struct ceph_osd_client *osdc = req->r_osdc;
2452
2453 mutex_lock(&osdc->request_mutex);
2454 if (req->r_linger)
2455 __unregister_linger_request(osdc, req);
2456 __unregister_request(osdc, req);
2457 mutex_unlock(&osdc->request_mutex);
2458
2459 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2460}
2461EXPORT_SYMBOL(ceph_osdc_cancel_request);
2462
f24e9980
SW		 2463/*
2464 * wait for a request to complete
2465 */
2466int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2467 struct ceph_osd_request *req)
2468{
2469 int rc;
2470
c9f9b93d
ID		 2471 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2472
f24e9980
SW		 2473 rc = wait_for_completion_interruptible(&req->r_completion);
2474 if (rc < 0) {
c9f9b93d
ID		 2475 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2476 ceph_osdc_cancel_request(req);
25845472 2477 complete_request(req);
f24e9980
SW		 2478 return rc;
2479 }
2480
c9f9b93d
ID		 2481 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2482 req->r_result);
f24e9980
SW		 2483 return req->r_result;
2484}
3d14c5d2 2485EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2486
2487/*
2488 * sync - wait for all in-flight requests to flush. avoid starvation.
2489 */
2490void ceph_osdc_sync(struct ceph_osd_client *osdc)
2491{
2492 struct ceph_osd_request *req;
2493 u64 last_tid, next_tid = 0;
2494
2495 mutex_lock(&osdc->request_mutex);
2496 last_tid = osdc->last_tid;
2497 while (1) {
2498 req = __lookup_request_ge(osdc, next_tid);
2499 if (!req)
2500 break;
2501 if (req->r_tid > last_tid)
2502 break;
2503
2504 next_tid = req->r_tid + 1;
2505 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2506 continue;
2507
2508 ceph_osdc_get_request(req);
2509 mutex_unlock(&osdc->request_mutex);
2510 dout("sync waiting on tid %llu (last is %llu)\n",
2511 req->r_tid, last_tid);
2512 wait_for_completion(&req->r_safe_completion);
2513 mutex_lock(&osdc->request_mutex);
2514 ceph_osdc_put_request(req);
2515 }
2516 mutex_unlock(&osdc->request_mutex);
2517 dout("sync done (thru tid %llu)\n", last_tid);
2518}
3d14c5d2 2519EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2520
dd935f44
JD		 2521/*
2522 * Call all pending notify callbacks - for use after a watch is
2523 * unregistered, to make sure no more callbacks for it will be invoked
2524 */
f6479449 2525void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44
JD		 2526{
2527 flush_workqueue(osdc->notify_wq);
2528}
2529EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2530
2531
f24e9980
SW		 2532/*
2533 * init, shutdown
2534 */
2535int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2536{
2537 int err;
2538
2539 dout("init\n");
2540 osdc->client = client;
2541 osdc->osdmap = NULL;
2542 init_rwsem(&osdc->map_sem);
2543 init_completion(&osdc->map_waiters);
2544 osdc->last_requested_map = 0;
2545 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2546 osdc->last_tid = 0;
2547 osdc->osds = RB_ROOT;
f5a2041b 2548 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2549 osdc->requests = RB_ROOT;
422d2cb8 2550 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2551 INIT_LIST_HEAD(&osdc->req_unsent);
2552 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2553 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2554 osdc->num_requests = 0;
2555 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2556 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2557 spin_lock_init(&osdc->event_lock);
2558 osdc->event_tree = RB_ROOT;
2559 osdc->event_count = 0;
f5a2041b
YS		 2560
2561 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2562 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2563
5f44f142 2564 err = -ENOMEM;
f24e9980
SW		 2565 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2566 sizeof(struct ceph_osd_request));
2567 if (!osdc->req_mempool)
5f44f142 2568 goto out;
f24e9980 2569
d50b409f
SW		 2570 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2571 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2572 "osd_op");
f24e9980 2573 if (err < 0)
5f44f142 2574 goto out_mempool;
d50b409f 2575 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2576 OSD_OPREPLY_FRONT_LEN, 10, true,
2577 "osd_op_reply");
c16e7869
SW		 2578 if (err < 0)
2579 goto out_msgpool;
a40c4f10 2580
dbcae088 2581 err = -ENOMEM;
a40c4f10 2582 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2583 if (!osdc->notify_wq)
c172ec5c
ID		 2584 goto out_msgpool_reply;
2585
f24e9980 2586 return 0;
5f44f142 2587
c172ec5c
ID		 2588out_msgpool_reply:
2589 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2590out_msgpool:
2591 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2592out_mempool:
2593 mempool_destroy(osdc->req_mempool);
2594out:
2595 return err;
f24e9980
SW		 2596}
2597
2598void ceph_osdc_stop(struct ceph_osd_client *osdc)
2599{
a40c4f10
YS		 2600 flush_workqueue(osdc->notify_wq);
2601 destroy_workqueue(osdc->notify_wq);
f24e9980 2602 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2603 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2604 if (osdc->osdmap) {
2605 ceph_osdmap_destroy(osdc->osdmap);
2606 osdc->osdmap = NULL;
2607 }
aca420bc 2608 remove_all_osds(osdc);
f24e9980
SW		 2609 mempool_destroy(osdc->req_mempool);
2610 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2611 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2612}
2613
2614/*
2615 * Read some contiguous pages. If we cross a stripe boundary, shorten
2616 * *plen. Return number of bytes read, or error.
2617 */
2618int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2619 struct ceph_vino vino, struct ceph_file_layout *layout,
2620 u64 off, u64 *plen,
2621 u32 truncate_seq, u64 truncate_size,
b7495fc2 2622 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2623{
2624 struct ceph_osd_request *req;
2625 int rc = 0;
2626
2627 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2628 vino.snap, off, *plen);
79528734 2629 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
f24e9980 2630 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2631 NULL, truncate_seq, truncate_size,
153e5167 2632 false);
6816282d
SW		 2633 if (IS_ERR(req))
2634 return PTR_ERR(req);
f24e9980
SW		 2635
2636 /* it may be a short read due to an object boundary */
0fff87ec 2637
406e2c9f 2638 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2639 pages, *plen, page_align, false, false);
f24e9980 2640
e0c59487 2641 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2642 off, *plen, *plen, page_align);
f24e9980 2643
79528734 2644 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2645
f24e9980
SW		 2646 rc = ceph_osdc_start_request(osdc, req, false);
2647 if (!rc)
2648 rc = ceph_osdc_wait_request(osdc, req);
2649
2650 ceph_osdc_put_request(req);
2651 dout("readpages result %d\n", rc);
2652 return rc;
2653}
3d14c5d2 2654EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2655
2656/*
2657 * do a synchronous write on N pages
2658 */
2659int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2660 struct ceph_file_layout *layout,
2661 struct ceph_snap_context *snapc,
2662 u64 off, u64 len,
2663 u32 truncate_seq, u64 truncate_size,
2664 struct timespec *mtime,
24808826 2665 struct page **pages, int num_pages)
f24e9980
SW		 2666{
2667 struct ceph_osd_request *req;
2668 int rc = 0;
b7495fc2 2669 int page_align = off & ~PAGE_MASK;
f24e9980 2670
acead002 2671 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
79528734 2672 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
f24e9980 2673 CEPH_OSD_OP_WRITE,
24808826 2674 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2675 snapc, truncate_seq, truncate_size,
153e5167 2676 true);
6816282d
SW		 2677 if (IS_ERR(req))
2678 return PTR_ERR(req);
f24e9980
SW		 2679
2680 /* it may be a short write due to an object boundary */
406e2c9f 2681 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2682 false, false);
2683 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2684
79528734 2685 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2686
87f979d3 2687 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2688 if (!rc)
2689 rc = ceph_osdc_wait_request(osdc, req);
2690
2691 ceph_osdc_put_request(req);
2692 if (rc == 0)
2693 rc = len;
2694 dout("writepages result %d\n", rc);
2695 return rc;
2696}
3d14c5d2 2697EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2698
5522ae0b
AE		 2699int ceph_osdc_setup(void)
2700{
2701 BUG_ON(ceph_osd_request_cache);
2702 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2703 sizeof (struct ceph_osd_request),
2704 __alignof__(struct ceph_osd_request),
2705 0, NULL);
2706
2707 return ceph_osd_request_cache ? 0 : -ENOMEM;
2708}
2709EXPORT_SYMBOL(ceph_osdc_setup);
2710
2711void ceph_osdc_cleanup(void)
2712{
2713 BUG_ON(!ceph_osd_request_cache);
2714 kmem_cache_destroy(ceph_osd_request_cache);
2715 ceph_osd_request_cache = NULL;
2716}
2717EXPORT_SYMBOL(ceph_osdc_cleanup);
2718
f24e9980
SW		 2719/*
2720 * handle incoming message
2721 */
2722static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2723{
2724 struct ceph_osd *osd = con->private;
32c895e7 2725 struct ceph_osd_client *osdc;
f24e9980
SW		 2726 int type = le16_to_cpu(msg->hdr.type);
2727
2728 if (!osd)
4a32f93d 2729 goto out;
32c895e7 2730 osdc = osd->o_osdc;
f24e9980
SW		 2731
2732 switch (type) {
2733 case CEPH_MSG_OSD_MAP:
2734 ceph_osdc_handle_map(osdc, msg);
2735 break;
2736 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2737 handle_reply(osdc, msg, con);
f24e9980 2738 break;
a40c4f10
YS		 2739 case CEPH_MSG_WATCH_NOTIFY:
2740 handle_watch_notify(osdc, msg);
2741 break;
f24e9980
SW		 2742
2743 default:
2744 pr_err("received unknown message type %d %s\n", type,
2745 ceph_msg_type_name(type));
2746 }
4a32f93d 2747out:
f24e9980
SW		 2748 ceph_msg_put(msg);
2749}
2750
5b3a4db3 2751/*
21b667f6
SW		 2752 * lookup and return message for incoming reply. set up reply message
2753 * pages.
5b3a4db3
SW		 2754 */
2755static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2756 struct ceph_msg_header *hdr,
2757 int *skip)
f24e9980
SW		 2758{
2759 struct ceph_osd *osd = con->private;
2760 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2761 struct ceph_msg *m;
0547a9b3 2762 struct ceph_osd_request *req;
3f0a4ac5 2763 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2764 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2765 u64 tid;
f24e9980 2766
0547a9b3
YS		 2767 tid = le64_to_cpu(hdr->tid);
2768 mutex_lock(&osdc->request_mutex);
2769 req = __lookup_request(osdc, tid);
2770 if (!req) {
2771 *skip = 1;
2772 m = NULL;
756a16a5
SW		 2773 dout("get_reply unknown tid %llu from osd%d\n", tid,
2774 osd->o_osd);
0547a9b3
YS		 2775 goto out;
2776 }
c16e7869 2777
ace6d3a9 2778 if (req->r_reply->con)
8921d114 2779 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2780 req->r_reply, req->r_reply->con);
2781 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2782
f2be82b0 2783 if (front_len > req->r_reply->front_alloc_len) {
b9a67899
JP		 2784 pr_warn("get_reply front %d > preallocated %d (%u#%llu)\n",
2785 front_len, req->r_reply->front_alloc_len,
2786 (unsigned int)con->peer_name.type,
2787 le64_to_cpu(con->peer_name.num));
3f0a4ac5
ID		 2788 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2789 false);
a79832f2 2790 if (!m)
c16e7869
SW		 2791 goto out;
2792 ceph_msg_put(req->r_reply);
2793 req->r_reply = m;
2794 }
2795 m = ceph_msg_get(req->r_reply);
2796
0547a9b3 2797 if (data_len > 0) {
a4ce40a9 2798 struct ceph_osd_data *osd_data;
0fff87ec 2799
a4ce40a9
AE		 2800 /*
2801 * XXX This is assuming there is only one op containing
2802 * XXX page data. Probably OK for reads, but this
2803 * XXX ought to be done more generally.
2804 */
406e2c9f 2805 osd_data = osd_req_op_extent_osd_data(req, 0);
0fff87ec 2806 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2807 if (osd_data->pages &&
e0c59487 2808 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2809
b9a67899 2810 pr_warn("tid %lld reply has %d bytes we had only %llu bytes ready\n",
e0c59487 2811 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2812 *skip = 1;
2813 ceph_msg_put(m);
2814 m = NULL;
2815 goto out;
2816 }
2ac2b7a6 2817 }
0547a9b3 2818 }
5b3a4db3 2819 *skip = 0;
c16e7869 2820 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2821
2822out:
2823 mutex_unlock(&osdc->request_mutex);
2450418c 2824 return m;
5b3a4db3
SW		 2825
2826}
2827
2828static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2829 struct ceph_msg_header *hdr,
2830 int *skip)
2831{
2832 struct ceph_osd *osd = con->private;
2833 int type = le16_to_cpu(hdr->type);
2834 int front = le32_to_cpu(hdr->front_len);
2835
1c20f2d2 2836 *skip = 0;
5b3a4db3
SW		 2837 switch (type) {
2838 case CEPH_MSG_OSD_MAP:
a40c4f10 2839 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2840 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2841 case CEPH_MSG_OSD_OPREPLY:
2842 return get_reply(con, hdr, skip);
2843 default:
2844 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2845 osd->o_osd);
2846 *skip = 1;
2847 return NULL;
2848 }
f24e9980
SW		 2849}
2850
2851/*
2852 * Wrappers to refcount containing ceph_osd struct
2853 */
2854static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2855{
2856 struct ceph_osd *osd = con->private;
2857 if (get_osd(osd))
2858 return con;
2859 return NULL;
2860}
2861
2862static void put_osd_con(struct ceph_connection *con)
2863{
2864 struct ceph_osd *osd = con->private;
2865 put_osd(osd);
2866}
2867
4e7a5dcd
SW		 2868/*
2869 * authentication
2870 */
a3530df3
AE		 2871/*
2872 * Note: returned pointer is the address of a structure that's
2873 * managed separately. Caller must *not* attempt to free it.
2874 */
2875static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2876 int *proto, int force_new)
4e7a5dcd
SW		 2877{
2878 struct ceph_osd *o = con->private;
2879 struct ceph_osd_client *osdc = o->o_osdc;
2880 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2881 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2882
74f1869f 2883 if (force_new && auth->authorizer) {
27859f97 2884 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2885 auth->authorizer = NULL;
2886 }
27859f97
SW		 2887 if (!auth->authorizer) {
2888 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2889 auth);
4e7a5dcd 2890 if (ret)
a3530df3 2891 return ERR_PTR(ret);
27859f97
SW		 2892 } else {
2893 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2894 auth);
2895 if (ret)
2896 return ERR_PTR(ret);
4e7a5dcd 2897 }
4e7a5dcd 2898 *proto = ac->protocol;
74f1869f 2899
a3530df3 2900 return auth;
4e7a5dcd
SW		 2901}
2902
2903
2904static int verify_authorizer_reply(struct ceph_connection *con, int len)
2905{
2906 struct ceph_osd *o = con->private;
2907 struct ceph_osd_client *osdc = o->o_osdc;
2908 struct ceph_auth_client *ac = osdc->client->monc.auth;
2909
27859f97 2910 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2911}
2912
9bd2e6f8
SW		 2913static int invalidate_authorizer(struct ceph_connection *con)
2914{
2915 struct ceph_osd *o = con->private;
2916 struct ceph_osd_client *osdc = o->o_osdc;
2917 struct ceph_auth_client *ac = osdc->client->monc.auth;
2918
27859f97 2919 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2920 return ceph_monc_validate_auth(&osdc->client->monc);
2921}
4e7a5dcd 2922
9e32789f 2923static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2924 .get = get_osd_con,
2925 .put = put_osd_con,
2926 .dispatch = dispatch,
4e7a5dcd
SW		 2927 .get_authorizer = get_authorizer,
2928 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2929 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2930 .alloc_msg = alloc_msg,
81b024e7 2931 .fault = osd_reset,
f24e9980 2932};
Linux 6.x block layer and io_uring tree(s)