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Linux 4.1
[linux-2.6-block.git] / net / ceph / osd_client.c
CommitLineData
a4ce40a9 1
3d14c5d2 2#include <linux/ceph/ceph_debug.h>
f24e9980 3
3d14c5d2 4#include <linux/module.h>
f24e9980
SW		 5#include <linux/err.h>
6#include <linux/highmem.h>
7#include <linux/mm.h>
8#include <linux/pagemap.h>
9#include <linux/slab.h>
10#include <linux/uaccess.h>
68b4476b
YS		 11#ifdef CONFIG_BLOCK
12#include <linux/bio.h>
13#endif
f24e9980 14
3d14c5d2
YS		 15#include <linux/ceph/libceph.h>
16#include <linux/ceph/osd_client.h>
17#include <linux/ceph/messenger.h>
18#include <linux/ceph/decode.h>
19#include <linux/ceph/auth.h>
20#include <linux/ceph/pagelist.h>
f24e9980 21
c16e7869
SW		 22#define OSD_OP_FRONT_LEN 4096
23#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 24
5522ae0b
AE		 25static struct kmem_cache *ceph_osd_request_cache;
26
9e32789f 27static const struct ceph_connection_operations osd_con_ops;
f24e9980 28
f9d25199 29static void __send_queued(struct ceph_osd_client *osdc);
6f6c7006 30static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
a40c4f10
YS		 31static void __register_request(struct ceph_osd_client *osdc,
32 struct ceph_osd_request *req);
2cc6128a
ID		 33static void __unregister_request(struct ceph_osd_client *osdc,
34 struct ceph_osd_request *req);
a40c4f10
YS		 35static void __unregister_linger_request(struct ceph_osd_client *osdc,
36 struct ceph_osd_request *req);
2cc6128a 37static void __enqueue_request(struct ceph_osd_request *req);
56e925b6
SW		 38static void __send_request(struct ceph_osd_client *osdc,
39 struct ceph_osd_request *req);
f24e9980
SW		 40
41/*
42 * Implement client access to distributed object storage cluster.
43 *
44 * All data objects are stored within a cluster/cloud of OSDs, or
45 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
46 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
47 * remote daemons serving up and coordinating consistent and safe
48 * access to storage.
49 *
50 * Cluster membership and the mapping of data objects onto storage devices
51 * are described by the osd map.
52 *
53 * We keep track of pending OSD requests (read, write), resubmit
54 * requests to different OSDs when the cluster topology/data layout
55 * change, or retry the affected requests when the communications
56 * channel with an OSD is reset.
57 */
58
59/*
60 * calculate the mapping of a file extent onto an object, and fill out the
61 * request accordingly. shorten extent as necessary if it crosses an
62 * object boundary.
63 *
64 * fill osd op in request message.
65 */
dbe0fc41 66static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 67 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 68{
60e56f13 69 u64 orig_len = *plen;
d63b77f4 70 int r;
f24e9980 71
60e56f13 72 /* object extent? */
75d1c941
AE		 73 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
74 objoff, objlen);
d63b77f4
SW		 75 if (r < 0)
76 return r;
75d1c941
AE		 77 if (*objlen < orig_len) {
78 *plen = *objlen;
60e56f13
AE		 79 dout(" skipping last %llu, final file extent %llu~%llu\n",
80 orig_len - *plen, off, *plen);
81 }
82
75d1c941 83 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
f24e9980 84
3ff5f385 85 return 0;
f24e9980
SW		 86}
87
c54d47bf
AE		 88static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
89{
90 memset(osd_data, 0, sizeof (*osd_data));
91 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
92}
93
a4ce40a9 94static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 95 struct page **pages, u64 length, u32 alignment,
96 bool pages_from_pool, bool own_pages)
97{
98 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
99 osd_data->pages = pages;
100 osd_data->length = length;
101 osd_data->alignment = alignment;
102 osd_data->pages_from_pool = pages_from_pool;
103 osd_data->own_pages = own_pages;
104}
43bfe5de 105
a4ce40a9 106static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 107 struct ceph_pagelist *pagelist)
108{
109 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
110 osd_data->pagelist = pagelist;
111}
43bfe5de
AE		 112
113#ifdef CONFIG_BLOCK
a4ce40a9 114static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 115 struct bio *bio, size_t bio_length)
116{
117 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
118 osd_data->bio = bio;
119 osd_data->bio_length = bio_length;
120}
43bfe5de
AE		 121#endif /* CONFIG_BLOCK */
122
863c7eb5
AE		 123#define osd_req_op_data(oreq, whch, typ, fld) \
124 ({ \
125 BUG_ON(whch >= (oreq)->r_num_ops); \
126 &(oreq)->r_ops[whch].typ.fld; \
127 })
128
49719778
AE		 129static struct ceph_osd_data *
130osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
131{
132 BUG_ON(which >= osd_req->r_num_ops);
133
134 return &osd_req->r_ops[which].raw_data_in;
135}
136
a4ce40a9
AE		 137struct ceph_osd_data *
138osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 139 unsigned int which)
a4ce40a9 140{
863c7eb5 141 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 142}
143EXPORT_SYMBOL(osd_req_op_extent_osd_data);
144
a4ce40a9
AE		 145struct ceph_osd_data *
146osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
147 unsigned int which)
148{
863c7eb5 149 return osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 150}
151EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
152
49719778
AE		 153void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
154 unsigned int which, struct page **pages,
155 u64 length, u32 alignment,
156 bool pages_from_pool, bool own_pages)
157{
158 struct ceph_osd_data *osd_data;
159
160 osd_data = osd_req_op_raw_data_in(osd_req, which);
161 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
162 pages_from_pool, own_pages);
163}
164EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
165
a4ce40a9 166void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 167 unsigned int which, struct page **pages,
168 u64 length, u32 alignment,
a4ce40a9
AE		 169 bool pages_from_pool, bool own_pages)
170{
171 struct ceph_osd_data *osd_data;
172
863c7eb5 173 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 174 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
175 pages_from_pool, own_pages);
a4ce40a9
AE		 176}
177EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
178
179void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 180 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 181{
182 struct ceph_osd_data *osd_data;
183
863c7eb5 184 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 185 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 186}
187EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
188
189#ifdef CONFIG_BLOCK
190void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 191 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 192{
193 struct ceph_osd_data *osd_data;
863c7eb5
AE		 194
195 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 196 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 197}
198EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
199#endif /* CONFIG_BLOCK */
200
201static void osd_req_op_cls_request_info_pagelist(
202 struct ceph_osd_request *osd_req,
203 unsigned int which, struct ceph_pagelist *pagelist)
204{
205 struct ceph_osd_data *osd_data;
206
863c7eb5 207 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 208 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 209}
210
04017e29
AE		 211void osd_req_op_cls_request_data_pagelist(
212 struct ceph_osd_request *osd_req,
213 unsigned int which, struct ceph_pagelist *pagelist)
214{
215 struct ceph_osd_data *osd_data;
216
863c7eb5 217 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29
AE		 218 ceph_osd_data_pagelist_init(osd_data, pagelist);
219}
220EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
221
6c57b554
AE		 222void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
223 unsigned int which, struct page **pages, u64 length,
224 u32 alignment, bool pages_from_pool, bool own_pages)
225{
226 struct ceph_osd_data *osd_data;
227
228 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
229 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
230 pages_from_pool, own_pages);
231}
232EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
233
a4ce40a9
AE		 234void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
235 unsigned int which, struct page **pages, u64 length,
236 u32 alignment, bool pages_from_pool, bool own_pages)
237{
238 struct ceph_osd_data *osd_data;
239
863c7eb5 240 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 241 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
242 pages_from_pool, own_pages);
a4ce40a9
AE		 243}
244EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
245
23c08a9c
AE		 246static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
247{
248 switch (osd_data->type) {
249 case CEPH_OSD_DATA_TYPE_NONE:
250 return 0;
251 case CEPH_OSD_DATA_TYPE_PAGES:
252 return osd_data->length;
253 case CEPH_OSD_DATA_TYPE_PAGELIST:
254 return (u64)osd_data->pagelist->length;
255#ifdef CONFIG_BLOCK
256 case CEPH_OSD_DATA_TYPE_BIO:
257 return (u64)osd_data->bio_length;
258#endif /* CONFIG_BLOCK */
259 default:
260 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
261 return 0;
262 }
263}
264
c54d47bf
AE		 265static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
266{
5476492f 267 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 268 int num_pages;
269
270 num_pages = calc_pages_for((u64)osd_data->alignment,
271 (u64)osd_data->length);
272 ceph_release_page_vector(osd_data->pages, num_pages);
273 }
5476492f
AE		 274 ceph_osd_data_init(osd_data);
275}
276
277static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
278 unsigned int which)
279{
280 struct ceph_osd_req_op *op;
281
282 BUG_ON(which >= osd_req->r_num_ops);
283 op = &osd_req->r_ops[which];
284
285 switch (op->op) {
286 case CEPH_OSD_OP_READ:
287 case CEPH_OSD_OP_WRITE:
288 ceph_osd_data_release(&op->extent.osd_data);
289 break;
290 case CEPH_OSD_OP_CALL:
291 ceph_osd_data_release(&op->cls.request_info);
04017e29 292 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 293 ceph_osd_data_release(&op->cls.response_data);
294 break;
d74b50be
YZ		 295 case CEPH_OSD_OP_SETXATTR:
296 case CEPH_OSD_OP_CMPXATTR:
297 ceph_osd_data_release(&op->xattr.osd_data);
298 break;
5476492f
AE		 299 default:
300 break;
301 }
c54d47bf
AE		 302}
303
f24e9980
SW		 304/*
305 * requests
306 */
9e94af20 307static void ceph_osdc_release_request(struct kref *kref)
f24e9980 308{
9e94af20
ID		 309 struct ceph_osd_request *req = container_of(kref,
310 struct ceph_osd_request, r_kref);
5476492f 311 unsigned int which;
415e49a9 312
9e94af20
ID		 313 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
314 req->r_request, req->r_reply);
6562d661
ID		 315 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
316 WARN_ON(!list_empty(&req->r_req_lru_item));
317 WARN_ON(!list_empty(&req->r_osd_item));
318 WARN_ON(!list_empty(&req->r_linger_item));
319 WARN_ON(!list_empty(&req->r_linger_osd_item));
320 WARN_ON(req->r_osd);
9e94af20 321
415e49a9
SW		 322 if (req->r_request)
323 ceph_msg_put(req->r_request);
ace6d3a9 324 if (req->r_reply) {
8921d114 325 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 326 ceph_msg_put(req->r_reply);
ace6d3a9 327 }
0fff87ec 328
5476492f
AE		 329 for (which = 0; which < req->r_num_ops; which++)
330 osd_req_op_data_release(req, which);
0fff87ec 331
415e49a9
SW		 332 ceph_put_snap_context(req->r_snapc);
333 if (req->r_mempool)
334 mempool_free(req, req->r_osdc->req_mempool);
335 else
5522ae0b
AE		 336 kmem_cache_free(ceph_osd_request_cache, req);
337
f24e9980 338}
9e94af20
ID		 339
340void ceph_osdc_get_request(struct ceph_osd_request *req)
341{
342 dout("%s %p (was %d)\n", __func__, req,
343 atomic_read(&req->r_kref.refcount));
344 kref_get(&req->r_kref);
345}
346EXPORT_SYMBOL(ceph_osdc_get_request);
347
348void ceph_osdc_put_request(struct ceph_osd_request *req)
349{
350 dout("%s %p (was %d)\n", __func__, req,
351 atomic_read(&req->r_kref.refcount));
352 kref_put(&req->r_kref, ceph_osdc_release_request);
353}
354EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 355
3499e8a5 356struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 357 struct ceph_snap_context *snapc,
1b83bef2 358 unsigned int num_ops,
3499e8a5 359 bool use_mempool,
54a54007 360 gfp_t gfp_flags)
f24e9980
SW		 361{
362 struct ceph_osd_request *req;
363 struct ceph_msg *msg;
1b83bef2
SW		 364 size_t msg_size;
365
79528734
AE		 366 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
367 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
368
1b83bef2
SW		 369 msg_size = 4 + 4 + 8 + 8 + 4+8;
370 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
371 msg_size += 1 + 8 + 4 + 4; /* pg_t */
2d0ebc5d 372 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
1b83bef2
SW		 373 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
374 msg_size += 8; /* snapid */
375 msg_size += 8; /* snap_seq */
376 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
377 msg_size += 4;
f24e9980
SW		 378
379 if (use_mempool) {
3499e8a5 380 req = mempool_alloc(osdc->req_mempool, gfp_flags);
f24e9980
SW		 381 memset(req, 0, sizeof(*req));
382 } else {
5522ae0b 383 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
f24e9980
SW		 384 }
385 if (req == NULL)
a79832f2 386 return NULL;
f24e9980 387
f24e9980
SW		 388 req->r_osdc = osdc;
389 req->r_mempool = use_mempool;
79528734 390 req->r_num_ops = num_ops;
68b4476b 391
415e49a9 392 kref_init(&req->r_kref);
f24e9980
SW		 393 init_completion(&req->r_completion);
394 init_completion(&req->r_safe_completion);
a978fa20 395 RB_CLEAR_NODE(&req->r_node);
f24e9980 396 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 397 INIT_LIST_HEAD(&req->r_linger_item);
1d0326b1 398 INIT_LIST_HEAD(&req->r_linger_osd_item);
935b639a 399 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 400 INIT_LIST_HEAD(&req->r_osd_item);
401
3c972c95 402 req->r_base_oloc.pool = -1;
205ee118 403 req->r_target_oloc.pool = -1;
22116525 404
c16e7869
SW		 405 /* create reply message */
406 if (use_mempool)
407 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
408 else
409 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
b61c2763 410 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
a79832f2 411 if (!msg) {
c16e7869 412 ceph_osdc_put_request(req);
a79832f2 413 return NULL;
c16e7869
SW		 414 }
415 req->r_reply = msg;
416
417 /* create request message; allow space for oid */
f24e9980 418 if (use_mempool)
8f3bc053 419 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 420 else
b61c2763 421 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
a79832f2 422 if (!msg) {
f24e9980 423 ceph_osdc_put_request(req);
a79832f2 424 return NULL;
f24e9980 425 }
68b4476b 426
f24e9980 427 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5
YS		 428
429 req->r_request = msg;
3499e8a5
YS		 430
431 return req;
432}
3d14c5d2 433EXPORT_SYMBOL(ceph_osdc_alloc_request);
3499e8a5 434
a8dd0a37 435static bool osd_req_opcode_valid(u16 opcode)
68b4476b 436{
a8dd0a37 437 switch (opcode) {
70b5bfa3
ID		 438#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
439__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
440#undef GENERATE_CASE
a8dd0a37
AE		 441 default:
442 return false;
443 }
444}
445
33803f33
AE		 446/*
447 * This is an osd op init function for opcodes that have no data or
448 * other information associated with them. It also serves as a
449 * common init routine for all the other init functions, below.
450 */
c99d2d4a 451static struct ceph_osd_req_op *
49719778 452_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
c99d2d4a 453 u16 opcode)
33803f33 454{
c99d2d4a
AE		 455 struct ceph_osd_req_op *op;
456
457 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 458 BUG_ON(!osd_req_opcode_valid(opcode));
459
c99d2d4a 460 op = &osd_req->r_ops[which];
33803f33 461 memset(op, 0, sizeof (*op));
33803f33 462 op->op = opcode;
c99d2d4a
AE		 463
464 return op;
33803f33
AE		 465}
466
49719778
AE		 467void osd_req_op_init(struct ceph_osd_request *osd_req,
468 unsigned int which, u16 opcode)
469{
470 (void)_osd_req_op_init(osd_req, which, opcode);
471}
472EXPORT_SYMBOL(osd_req_op_init);
473
c99d2d4a
AE		 474void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
475 unsigned int which, u16 opcode,
33803f33
AE		 476 u64 offset, u64 length,
477 u64 truncate_size, u32 truncate_seq)
478{
49719778 479 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33
AE		 480 size_t payload_len = 0;
481
ad7a60de 482 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197 483 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 484
33803f33
AE		 485 op->extent.offset = offset;
486 op->extent.length = length;
487 op->extent.truncate_size = truncate_size;
488 op->extent.truncate_seq = truncate_seq;
489 if (opcode == CEPH_OSD_OP_WRITE)
490 payload_len += length;
491
492 op->payload_len = payload_len;
493}
494EXPORT_SYMBOL(osd_req_op_extent_init);
495
c99d2d4a
AE		 496void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
497 unsigned int which, u64 length)
e5975c7c 498{
c99d2d4a
AE		 499 struct ceph_osd_req_op *op;
500 u64 previous;
501
502 BUG_ON(which >= osd_req->r_num_ops);
503 op = &osd_req->r_ops[which];
504 previous = op->extent.length;
e5975c7c
AE		 505
506 if (length == previous)
507 return; /* Nothing to do */
508 BUG_ON(length > previous);
509
510 op->extent.length = length;
511 op->payload_len -= previous - length;
512}
513EXPORT_SYMBOL(osd_req_op_extent_update);
514
c99d2d4a 515void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 516 u16 opcode, const char *class, const char *method)
33803f33 517{
49719778 518 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
5f562df5 519 struct ceph_pagelist *pagelist;
33803f33
AE		 520 size_t payload_len = 0;
521 size_t size;
522
523 BUG_ON(opcode != CEPH_OSD_OP_CALL);
524
5f562df5
AE		 525 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
526 BUG_ON(!pagelist);
527 ceph_pagelist_init(pagelist);
528
33803f33
AE		 529 op->cls.class_name = class;
530 size = strlen(class);
531 BUG_ON(size > (size_t) U8_MAX);
532 op->cls.class_len = size;
5f562df5 533 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 534 payload_len += size;
535
536 op->cls.method_name = method;
537 size = strlen(method);
538 BUG_ON(size > (size_t) U8_MAX);
539 op->cls.method_len = size;
5f562df5 540 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 541 payload_len += size;
542
a4ce40a9 543 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 544
33803f33
AE		 545 op->cls.argc = 0; /* currently unused */
546
547 op->payload_len = payload_len;
548}
549EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 550
d74b50be
YZ		 551int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
552 u16 opcode, const char *name, const void *value,
553 size_t size, u8 cmp_op, u8 cmp_mode)
554{
555 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
556 struct ceph_pagelist *pagelist;
557 size_t payload_len;
558
559 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
560
561 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
562 if (!pagelist)
563 return -ENOMEM;
564
565 ceph_pagelist_init(pagelist);
566
567 payload_len = strlen(name);
568 op->xattr.name_len = payload_len;
569 ceph_pagelist_append(pagelist, name, payload_len);
570
571 op->xattr.value_len = size;
572 ceph_pagelist_append(pagelist, value, size);
573 payload_len += size;
574
575 op->xattr.cmp_op = cmp_op;
576 op->xattr.cmp_mode = cmp_mode;
577
578 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
579 op->payload_len = payload_len;
580 return 0;
581}
582EXPORT_SYMBOL(osd_req_op_xattr_init);
583
c99d2d4a
AE		 584void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
585 unsigned int which, u16 opcode,
33803f33
AE		 586 u64 cookie, u64 version, int flag)
587{
49719778 588 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33 589
c99d2d4a 590 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 591
592 op->watch.cookie = cookie;
9ef1ee5a 593 op->watch.ver = version;
33803f33 594 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 595 op->watch.flag = (u8)1;
33803f33
AE		 596}
597EXPORT_SYMBOL(osd_req_op_watch_init);
598
c647b8a8
ID		 599void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
600 unsigned int which,
601 u64 expected_object_size,
602 u64 expected_write_size)
603{
604 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
605 CEPH_OSD_OP_SETALLOCHINT);
606
607 op->alloc_hint.expected_object_size = expected_object_size;
608 op->alloc_hint.expected_write_size = expected_write_size;
609
610 /*
611 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
612 * not worth a feature bit. Set FAILOK per-op flag to make
613 * sure older osds don't trip over an unsupported opcode.
614 */
615 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
616}
617EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
618
90af3602 619static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 620 struct ceph_osd_data *osd_data)
621{
622 u64 length = ceph_osd_data_length(osd_data);
623
624 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
625 BUG_ON(length > (u64) SIZE_MAX);
626 if (length)
90af3602 627 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 628 length, osd_data->alignment);
629 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
630 BUG_ON(!length);
90af3602 631 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 632#ifdef CONFIG_BLOCK
633 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 634 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 635#endif
636 } else {
637 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
638 }
639}
640
a8dd0a37 641static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 642 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 643{
79528734 644 struct ceph_osd_req_op *src;
04017e29 645 struct ceph_osd_data *osd_data;
54d50649 646 u64 request_data_len = 0;
04017e29 647 u64 data_length;
a8dd0a37 648
79528734
AE		 649 BUG_ON(which >= req->r_num_ops);
650 src = &req->r_ops[which];
a8dd0a37
AE		 651 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
652 pr_err("unrecognized osd opcode %d\n", src->op);
653
654 return 0;
655 }
656
657 switch (src->op) {
658 case CEPH_OSD_OP_STAT:
49719778
AE		 659 osd_data = &src->raw_data_in;
660 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 661 break;
662 case CEPH_OSD_OP_READ:
663 case CEPH_OSD_OP_WRITE:
ad7a60de 664 case CEPH_OSD_OP_ZERO:
ad7a60de 665 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37 666 if (src->op == CEPH_OSD_OP_WRITE)
54d50649 667 request_data_len = src->extent.length;
a8dd0a37
AE		 668 dst->extent.offset = cpu_to_le64(src->extent.offset);
669 dst->extent.length = cpu_to_le64(src->extent.length);
670 dst->extent.truncate_size =
671 cpu_to_le64(src->extent.truncate_size);
672 dst->extent.truncate_seq =
673 cpu_to_le32(src->extent.truncate_seq);
04017e29 674 osd_data = &src->extent.osd_data;
5476492f 675 if (src->op == CEPH_OSD_OP_WRITE)
04017e29 676 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 677 else
04017e29 678 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 679 break;
680 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 681 dst->cls.class_len = src->cls.class_len;
682 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 683 osd_data = &src->cls.request_info;
684 ceph_osdc_msg_data_add(req->r_request, osd_data);
685 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
686 request_data_len = osd_data->pagelist->length;
687
688 osd_data = &src->cls.request_data;
689 data_length = ceph_osd_data_length(osd_data);
690 if (data_length) {
691 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
692 dst->cls.indata_len = cpu_to_le32(data_length);
693 ceph_osdc_msg_data_add(req->r_request, osd_data);
694 src->payload_len += data_length;
695 request_data_len += data_length;
696 }
697 osd_data = &src->cls.response_data;
698 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 699 break;
700 case CEPH_OSD_OP_STARTSYNC:
701 break;
702 case CEPH_OSD_OP_NOTIFY_ACK:
703 case CEPH_OSD_OP_WATCH:
704 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
705 dst->watch.ver = cpu_to_le64(src->watch.ver);
706 dst->watch.flag = src->watch.flag;
707 break;
c647b8a8
ID		 708 case CEPH_OSD_OP_SETALLOCHINT:
709 dst->alloc_hint.expected_object_size =
710 cpu_to_le64(src->alloc_hint.expected_object_size);
711 dst->alloc_hint.expected_write_size =
712 cpu_to_le64(src->alloc_hint.expected_write_size);
713 break;
d74b50be
YZ		 714 case CEPH_OSD_OP_SETXATTR:
715 case CEPH_OSD_OP_CMPXATTR:
716 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
717 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
718 dst->xattr.cmp_op = src->xattr.cmp_op;
719 dst->xattr.cmp_mode = src->xattr.cmp_mode;
720 osd_data = &src->xattr.osd_data;
721 ceph_osdc_msg_data_add(req->r_request, osd_data);
722 request_data_len = osd_data->pagelist->length;
723 break;
864e9197
YZ		 724 case CEPH_OSD_OP_CREATE:
725 case CEPH_OSD_OP_DELETE:
726 break;
a8dd0a37 727 default:
4c46459c 728 pr_err("unsupported osd opcode %s\n",
8f63ca2d 729 ceph_osd_op_name(src->op));
4c46459c 730 WARN_ON(1);
a8dd0a37
AE		 731
732 return 0;
68b4476b 733 }
7b25bf5f 734
a8dd0a37 735 dst->op = cpu_to_le16(src->op);
7b25bf5f 736 dst->flags = cpu_to_le32(src->flags);
68b4476b 737 dst->payload_len = cpu_to_le32(src->payload_len);
175face2 738
54d50649 739 return request_data_len;
68b4476b
YS		 740}
741
3499e8a5
YS		 742/*
743 * build new request AND message, calculate layout, and adjust file
744 * extent as needed.
745 *
746 * if the file was recently truncated, we include information about its
747 * old and new size so that the object can be updated appropriately. (we
748 * avoid synchronously deleting truncated objects because it's slow.)
749 *
750 * if @do_sync, include a 'startsync' command so that the osd will flush
751 * data quickly.
752 */
753struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
754 struct ceph_file_layout *layout,
755 struct ceph_vino vino,
715e4cd4
YZ		 756 u64 off, u64 *plen,
757 unsigned int which, int num_ops,
3499e8a5
YS		 758 int opcode, int flags,
759 struct ceph_snap_context *snapc,
3499e8a5
YS		 760 u32 truncate_seq,
761 u64 truncate_size,
153e5167 762 bool use_mempool)
3499e8a5 763{
68b4476b 764 struct ceph_osd_request *req;
75d1c941
AE		 765 u64 objnum = 0;
766 u64 objoff = 0;
767 u64 objlen = 0;
6816282d 768 int r;
68b4476b 769
ad7a60de 770 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 771 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
772 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 773
acead002 774 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 775 GFP_NOFS);
4ad12621 776 if (!req)
6816282d 777 return ERR_PTR(-ENOMEM);
79528734 778
d178a9e7 779 req->r_flags = flags;
3499e8a5
YS		 780
781 /* calculate max write size */
a19dadfb 782 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 783 if (r < 0) {
784 ceph_osdc_put_request(req);
6816282d 785 return ERR_PTR(r);
3ff5f385 786 }
a19dadfb 787
864e9197 788 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
715e4cd4 789 osd_req_op_init(req, which, opcode);
864e9197
YZ		 790 } else {
791 u32 object_size = le32_to_cpu(layout->fl_object_size);
792 u32 object_base = off - objoff;
793 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
794 if (truncate_size <= object_base) {
795 truncate_size = 0;
796 } else {
797 truncate_size -= object_base;
798 if (truncate_size > object_size)
799 truncate_size = object_size;
800 }
ccca4e37 801 }
715e4cd4 802 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 803 truncate_size, truncate_seq);
804 }
d18d1e28 805
3c972c95 806 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
3499e8a5 807
3c972c95 808 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
4295f221 809 "%llx.%08llx", vino.ino, objnum);
3c972c95 810 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
dbe0fc41 811
f24e9980
SW		 812 return req;
813}
3d14c5d2 814EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 815
816/*
817 * We keep osd requests in an rbtree, sorted by ->r_tid.
818 */
819static void __insert_request(struct ceph_osd_client *osdc,
820 struct ceph_osd_request *new)
821{
822 struct rb_node **p = &osdc->requests.rb_node;
823 struct rb_node *parent = NULL;
824 struct ceph_osd_request *req = NULL;
825
826 while (*p) {
827 parent = *p;
828 req = rb_entry(parent, struct ceph_osd_request, r_node);
829 if (new->r_tid < req->r_tid)
830 p = &(*p)->rb_left;
831 else if (new->r_tid > req->r_tid)
832 p = &(*p)->rb_right;
833 else
834 BUG();
835 }
836
837 rb_link_node(&new->r_node, parent, p);
838 rb_insert_color(&new->r_node, &osdc->requests);
839}
840
841static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
842 u64 tid)
843{
844 struct ceph_osd_request *req;
845 struct rb_node *n = osdc->requests.rb_node;
846
847 while (n) {
848 req = rb_entry(n, struct ceph_osd_request, r_node);
849 if (tid < req->r_tid)
850 n = n->rb_left;
851 else if (tid > req->r_tid)
852 n = n->rb_right;
853 else
854 return req;
855 }
856 return NULL;
857}
858
859static struct ceph_osd_request *
860__lookup_request_ge(struct ceph_osd_client *osdc,
861 u64 tid)
862{
863 struct ceph_osd_request *req;
864 struct rb_node *n = osdc->requests.rb_node;
865
866 while (n) {
867 req = rb_entry(n, struct ceph_osd_request, r_node);
868 if (tid < req->r_tid) {
869 if (!n->rb_left)
870 return req;
871 n = n->rb_left;
872 } else if (tid > req->r_tid) {
873 n = n->rb_right;
874 } else {
875 return req;
876 }
877 }
878 return NULL;
879}
880
2cc6128a
ID		 881static void __kick_linger_request(struct ceph_osd_request *req)
882{
883 struct ceph_osd_client *osdc = req->r_osdc;
884 struct ceph_osd *osd = req->r_osd;
885
886 /*
887 * Linger requests need to be resent with a new tid to avoid
888 * the dup op detection logic on the OSDs. Achieve this with
889 * a re-register dance instead of open-coding.
890 */
891 ceph_osdc_get_request(req);
892 if (!list_empty(&req->r_linger_item))
893 __unregister_linger_request(osdc, req);
894 else
895 __unregister_request(osdc, req);
896 __register_request(osdc, req);
897 ceph_osdc_put_request(req);
898
899 /*
900 * Unless request has been registered as both normal and
901 * lingering, __unregister{,_linger}_request clears r_osd.
902 * However, here we need to preserve r_osd to make sure we
903 * requeue on the same OSD.
904 */
905 WARN_ON(req->r_osd || !osd);
906 req->r_osd = osd;
907
908 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
909 __enqueue_request(req);
910}
911
6f6c7006
SW		 912/*
913 * Resubmit requests pending on the given osd.
914 */
915static void __kick_osd_requests(struct ceph_osd_client *osdc,
916 struct ceph_osd *osd)
917{
a40c4f10 918 struct ceph_osd_request *req, *nreq;
e02493c0 919 LIST_HEAD(resend);
2cc6128a 920 LIST_HEAD(resend_linger);
6f6c7006
SW		 921 int err;
922
2cc6128a 923 dout("%s osd%d\n", __func__, osd->o_osd);
6f6c7006 924 err = __reset_osd(osdc, osd);
685a7555 925 if (err)
6f6c7006 926 return;
2cc6128a 927
e02493c0
AE		 928 /*
929 * Build up a list of requests to resend by traversing the
930 * osd's list of requests. Requests for a given object are
931 * sent in tid order, and that is also the order they're
932 * kept on this list. Therefore all requests that are in
933 * flight will be found first, followed by all requests that
934 * have not yet been sent. And to resend requests while
935 * preserving this order we will want to put any sent
936 * requests back on the front of the osd client's unsent
937 * list.
938 *
939 * So we build a separate ordered list of already-sent
940 * requests for the affected osd and splice it onto the
941 * front of the osd client's unsent list. Once we've seen a
942 * request that has not yet been sent we're done. Those
943 * requests are already sitting right where they belong.
944 */
6f6c7006 945 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 946 if (!req->r_sent)
947 break;
2cc6128a
ID		 948
949 if (!req->r_linger) {
950 dout("%s requeueing %p tid %llu\n", __func__, req,
951 req->r_tid);
952 list_move_tail(&req->r_req_lru_item, &resend);
a40c4f10 953 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2cc6128a
ID		 954 } else {
955 list_move_tail(&req->r_req_lru_item, &resend_linger);
956 }
a40c4f10 957 }
e02493c0 958 list_splice(&resend, &osdc->req_unsent);
a40c4f10 959
e02493c0 960 /*
2cc6128a
ID		 961 * Both registered and not yet registered linger requests are
962 * enqueued with a new tid on the same OSD. We add/move them
963 * to req_unsent/o_requests at the end to keep things in tid
964 * order.
e02493c0 965 */
a40c4f10 966 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1d0326b1 967 r_linger_osd_item) {
2cc6128a
ID		 968 WARN_ON(!list_empty(&req->r_req_lru_item));
969 __kick_linger_request(req);
6f6c7006 970 }
2cc6128a
ID		 971
972 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
973 __kick_linger_request(req);
6f6c7006
SW		 974}
975
f24e9980 976/*
81b024e7 977 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 978 */
979static void osd_reset(struct ceph_connection *con)
980{
981 struct ceph_osd *osd = con->private;
982 struct ceph_osd_client *osdc;
983
984 if (!osd)
985 return;
986 dout("osd_reset osd%d\n", osd->o_osd);
987 osdc = osd->o_osdc;
f24e9980 988 down_read(&osdc->map_sem);
83aff95e
SW		 989 mutex_lock(&osdc->request_mutex);
990 __kick_osd_requests(osdc, osd);
f9d25199 991 __send_queued(osdc);
83aff95e 992 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 993 up_read(&osdc->map_sem);
994}
995
996/*
997 * Track open sessions with osds.
998 */
e10006f8 999static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1000{
1001 struct ceph_osd *osd;
1002
1003 osd = kzalloc(sizeof(*osd), GFP_NOFS);
1004 if (!osd)
1005 return NULL;
1006
1007 atomic_set(&osd->o_ref, 1);
1008 osd->o_osdc = osdc;
e10006f8 1009 osd->o_osd = onum;
f407731d 1010 RB_CLEAR_NODE(&osd->o_node);
f24e9980 1011 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 1012 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 1013 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 1014 osd->o_incarnation = 1;
1015
b7a9e5dd 1016 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1017
422d2cb8 1018 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 1019 return osd;
1020}
1021
1022static struct ceph_osd *get_osd(struct ceph_osd *osd)
1023{
1024 if (atomic_inc_not_zero(&osd->o_ref)) {
1025 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1026 atomic_read(&osd->o_ref));
1027 return osd;
1028 } else {
1029 dout("get_osd %p FAIL\n", osd);
1030 return NULL;
1031 }
1032}
1033
1034static void put_osd(struct ceph_osd *osd)
1035{
1036 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1037 atomic_read(&osd->o_ref) - 1);
b28ec2f3 1038 if (atomic_dec_and_test(&osd->o_ref)) {
79494d1b
SW		 1039 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
1040
b28ec2f3
ID		 1041 if (osd->o_auth.authorizer)
1042 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 1043 kfree(osd);
79494d1b 1044 }
f24e9980
SW		 1045}
1046
1047/*
1048 * remove an osd from our map
1049 */
f5a2041b 1050static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1051{
7eb71e03 1052 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
cc9f1f51
ID		 1053 WARN_ON(!list_empty(&osd->o_requests));
1054 WARN_ON(!list_empty(&osd->o_linger_requests));
7c6e6fc5 1055
f5a2041b 1056 list_del_init(&osd->o_osd_lru);
7eb71e03
ID		 1057 rb_erase(&osd->o_node, &osdc->osds);
1058 RB_CLEAR_NODE(&osd->o_node);
1059}
1060
1061static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1062{
1063 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1064
1065 if (!RB_EMPTY_NODE(&osd->o_node)) {
1066 ceph_con_close(&osd->o_con);
1067 __remove_osd(osdc, osd);
1068 put_osd(osd);
1069 }
f24e9980
SW		 1070}
1071
aca420bc
SW		 1072static void remove_all_osds(struct ceph_osd_client *osdc)
1073{
048a9d2d 1074 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 1075 mutex_lock(&osdc->request_mutex);
1076 while (!RB_EMPTY_ROOT(&osdc->osds)) {
1077 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
1078 struct ceph_osd, o_node);
7eb71e03 1079 remove_osd(osdc, osd);
aca420bc
SW		 1080 }
1081 mutex_unlock(&osdc->request_mutex);
1082}
1083
f5a2041b
YS		 1084static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1085 struct ceph_osd *osd)
1086{
bbf37ec3 1087 dout("%s %p\n", __func__, osd);
f5a2041b 1088 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1089
f5a2041b 1090 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
3d14c5d2 1091 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
f5a2041b
YS		 1092}
1093
bbf37ec3
ID		 1094static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1095 struct ceph_osd *osd)
1096{
1097 dout("%s %p\n", __func__, osd);
1098
1099 if (list_empty(&osd->o_requests) &&
1100 list_empty(&osd->o_linger_requests))
1101 __move_osd_to_lru(osdc, osd);
1102}
1103
f5a2041b
YS		 1104static void __remove_osd_from_lru(struct ceph_osd *osd)
1105{
1106 dout("__remove_osd_from_lru %p\n", osd);
1107 if (!list_empty(&osd->o_osd_lru))
1108 list_del_init(&osd->o_osd_lru);
1109}
1110
aca420bc 1111static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1112{
1113 struct ceph_osd *osd, *nosd;
1114
1115 dout("__remove_old_osds %p\n", osdc);
1116 mutex_lock(&osdc->request_mutex);
1117 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1118 if (time_before(jiffies, osd->lru_ttl))
f5a2041b 1119 break;
7eb71e03 1120 remove_osd(osdc, osd);
f5a2041b
YS		 1121 }
1122 mutex_unlock(&osdc->request_mutex);
1123}
1124
f24e9980
SW		 1125/*
1126 * reset osd connect
1127 */
f5a2041b 1128static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1129{
c3acb181 1130 struct ceph_entity_addr *peer_addr;
f24e9980 1131
f5a2041b 1132 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1133 if (list_empty(&osd->o_requests) &&
1134 list_empty(&osd->o_linger_requests)) {
7eb71e03 1135 remove_osd(osdc, osd);
c3acb181
AE		 1136 return -ENODEV;
1137 }
1138
1139 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1140 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1141 !ceph_con_opened(&osd->o_con)) {
1142 struct ceph_osd_request *req;
1143
0b4af2e8
ID		 1144 dout("osd addr hasn't changed and connection never opened, "
1145 "letting msgr retry\n");
87b315a5
SW		 1146 /* touch each r_stamp for handle_timeout()'s benfit */
1147 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1148 req->r_stamp = jiffies;
c3acb181
AE		 1149
1150 return -EAGAIN;
f24e9980 1151 }
c3acb181
AE		 1152
1153 ceph_con_close(&osd->o_con);
1154 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1155 osd->o_incarnation++;
1156
1157 return 0;
f24e9980
SW		 1158}
1159
1160static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1161{
1162 struct rb_node **p = &osdc->osds.rb_node;
1163 struct rb_node *parent = NULL;
1164 struct ceph_osd *osd = NULL;
1165
aca420bc 1166 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1167 while (*p) {
1168 parent = *p;
1169 osd = rb_entry(parent, struct ceph_osd, o_node);
1170 if (new->o_osd < osd->o_osd)
1171 p = &(*p)->rb_left;
1172 else if (new->o_osd > osd->o_osd)
1173 p = &(*p)->rb_right;
1174 else
1175 BUG();
1176 }
1177
1178 rb_link_node(&new->o_node, parent, p);
1179 rb_insert_color(&new->o_node, &osdc->osds);
1180}
1181
1182static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1183{
1184 struct ceph_osd *osd;
1185 struct rb_node *n = osdc->osds.rb_node;
1186
1187 while (n) {
1188 osd = rb_entry(n, struct ceph_osd, o_node);
1189 if (o < osd->o_osd)
1190 n = n->rb_left;
1191 else if (o > osd->o_osd)
1192 n = n->rb_right;
1193 else
1194 return osd;
1195 }
1196 return NULL;
1197}
1198
422d2cb8
YS		 1199static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1200{
1201 schedule_delayed_work(&osdc->timeout_work,
3d14c5d2 1202 osdc->client->options->osd_keepalive_timeout * HZ);
422d2cb8
YS		 1203}
1204
1205static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1206{
1207 cancel_delayed_work(&osdc->timeout_work);
1208}
f24e9980
SW		 1209
1210/*
1211 * Register request, assign tid. If this is the first request, set up
1212 * the timeout event.
1213 */
a40c4f10
YS		 1214static void __register_request(struct ceph_osd_client *osdc,
1215 struct ceph_osd_request *req)
f24e9980 1216{
f24e9980 1217 req->r_tid = ++osdc->last_tid;
6df058c0 1218 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1219 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1220 __insert_request(osdc, req);
1221 ceph_osdc_get_request(req);
1222 osdc->num_requests++;
f24e9980 1223 if (osdc->num_requests == 1) {
422d2cb8
YS		 1224 dout(" first request, scheduling timeout\n");
1225 __schedule_osd_timeout(osdc);
f24e9980 1226 }
a40c4f10
YS		 1227}
1228
f24e9980
SW		 1229/*
1230 * called under osdc->request_mutex
1231 */
1232static void __unregister_request(struct ceph_osd_client *osdc,
1233 struct ceph_osd_request *req)
1234{
35f9f8a0
SW		 1235 if (RB_EMPTY_NODE(&req->r_node)) {
1236 dout("__unregister_request %p tid %lld not registered\n",
1237 req, req->r_tid);
1238 return;
1239 }
1240
f24e9980
SW		 1241 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1242 rb_erase(&req->r_node, &osdc->requests);
6562d661 1243 RB_CLEAR_NODE(&req->r_node);
f24e9980
SW		 1244 osdc->num_requests--;
1245
0ba6478d
SW		 1246 if (req->r_osd) {
1247 /* make sure the original request isn't in flight. */
6740a845 1248 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1249
1250 list_del_init(&req->r_osd_item);
bbf37ec3 1251 maybe_move_osd_to_lru(osdc, req->r_osd);
4f23409e 1252 if (list_empty(&req->r_linger_osd_item))
a40c4f10 1253 req->r_osd = NULL;
0ba6478d 1254 }
f24e9980 1255
7d5f2481 1256 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1257 ceph_osdc_put_request(req);
1258
422d2cb8
YS		 1259 if (osdc->num_requests == 0) {
1260 dout(" no requests, canceling timeout\n");
1261 __cancel_osd_timeout(osdc);
f24e9980
SW		 1262 }
1263}
1264
1265/*
1266 * Cancel a previously queued request message
1267 */
1268static void __cancel_request(struct ceph_osd_request *req)
1269{
6bc18876 1270 if (req->r_sent && req->r_osd) {
6740a845 1271 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1272 req->r_sent = 0;
1273 }
1274}
1275
a40c4f10
YS		 1276static void __register_linger_request(struct ceph_osd_client *osdc,
1277 struct ceph_osd_request *req)
1278{
af593064
ID		 1279 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1280 WARN_ON(!req->r_linger);
1281
96e4dac6 1282 ceph_osdc_get_request(req);
a40c4f10 1283 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89 1284 if (req->r_osd)
1d0326b1 1285 list_add_tail(&req->r_linger_osd_item,
6194ea89 1286 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1287}
1288
1289static void __unregister_linger_request(struct ceph_osd_client *osdc,
1290 struct ceph_osd_request *req)
1291{
af593064
ID		 1292 WARN_ON(!req->r_linger);
1293
1294 if (list_empty(&req->r_linger_item)) {
1295 dout("%s %p tid %llu not registered\n", __func__, req,
1296 req->r_tid);
1297 return;
1298 }
1299
1300 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
61c74035 1301 list_del_init(&req->r_linger_item);
af593064 1302
a40c4f10 1303 if (req->r_osd) {
1d0326b1 1304 list_del_init(&req->r_linger_osd_item);
bbf37ec3 1305 maybe_move_osd_to_lru(osdc, req->r_osd);
fbdb9190
SW		 1306 if (list_empty(&req->r_osd_item))
1307 req->r_osd = NULL;
a40c4f10 1308 }
96e4dac6 1309 ceph_osdc_put_request(req);
a40c4f10
YS		 1310}
1311
a40c4f10
YS		 1312void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1313 struct ceph_osd_request *req)
1314{
1315 if (!req->r_linger) {
1316 dout("set_request_linger %p\n", req);
1317 req->r_linger = 1;
a40c4f10
YS		 1318 }
1319}
1320EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1321
d29adb34
JD		 1322/*
1323 * Returns whether a request should be blocked from being sent
1324 * based on the current osdmap and osd_client settings.
1325 *
1326 * Caller should hold map_sem for read.
1327 */
1328static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1329 struct ceph_osd_request *req)
1330{
1331 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1332 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1333 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1334 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1335 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1336}
1337
17a13e40
ID		 1338/*
1339 * Calculate mapping of a request to a PG. Takes tiering into account.
1340 */
1341static int __calc_request_pg(struct ceph_osdmap *osdmap,
1342 struct ceph_osd_request *req,
1343 struct ceph_pg *pg_out)
1344{
205ee118
ID		 1345 bool need_check_tiering;
1346
1347 need_check_tiering = false;
1348 if (req->r_target_oloc.pool == -1) {
1349 req->r_target_oloc = req->r_base_oloc; /* struct */
1350 need_check_tiering = true;
1351 }
1352 if (req->r_target_oid.name_len == 0) {
1353 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1354 need_check_tiering = true;
1355 }
1356
1357 if (need_check_tiering &&
1358 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
17a13e40
ID		 1359 struct ceph_pg_pool_info *pi;
1360
205ee118 1361 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
17a13e40
ID		 1362 if (pi) {
1363 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1364 pi->read_tier >= 0)
205ee118 1365 req->r_target_oloc.pool = pi->read_tier;
17a13e40
ID		 1366 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1367 pi->write_tier >= 0)
205ee118 1368 req->r_target_oloc.pool = pi->write_tier;
17a13e40
ID		 1369 }
1370 /* !pi is caught in ceph_oloc_oid_to_pg() */
1371 }
1372
205ee118
ID		 1373 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1374 &req->r_target_oid, pg_out);
17a13e40
ID		 1375}
1376
f671b581
ID		 1377static void __enqueue_request(struct ceph_osd_request *req)
1378{
1379 struct ceph_osd_client *osdc = req->r_osdc;
1380
1381 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1382 req->r_osd ? req->r_osd->o_osd : -1);
1383
1384 if (req->r_osd) {
1385 __remove_osd_from_lru(req->r_osd);
1386 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1387 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1388 } else {
1389 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1390 }
1391}
1392
f24e9980
SW		 1393/*
1394 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1395 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1396 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1397 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1398 *
1399 * Return 0 if unchanged, 1 if changed, or negative on error.
1400 *
1401 * Caller should hold map_sem for read and request_mutex.
1402 */
6f6c7006 1403static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1404 struct ceph_osd_request *req, int force_resend)
f24e9980 1405{
5b191d99 1406 struct ceph_pg pgid;
d85b7056 1407 int acting[CEPH_PG_MAX_SIZE];
8008ab10 1408 int num, o;
f24e9980 1409 int err;
d29adb34 1410 bool was_paused;
f24e9980 1411
6f6c7006 1412 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40
ID		 1413
1414 err = __calc_request_pg(osdc->osdmap, req, &pgid);
6f6c7006
SW		 1415 if (err) {
1416 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1417 return err;
6f6c7006 1418 }
7740a42f
SW		 1419 req->r_pgid = pgid;
1420
8008ab10
ID		 1421 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o);
1422 if (num < 0)
1423 num = 0;
f24e9980 1424
d29adb34
JD		 1425 was_paused = req->r_paused;
1426 req->r_paused = __req_should_be_paused(osdc, req);
1427 if (was_paused && !req->r_paused)
1428 force_resend = 1;
1429
38d6453c
SW		 1430 if ((!force_resend &&
1431 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1432 req->r_sent >= req->r_osd->o_incarnation &&
1433 req->r_num_pg_osds == num &&
1434 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
d29adb34
JD		 1435 (req->r_osd == NULL && o == -1) ||
1436 req->r_paused)
f24e9980
SW		 1437 return 0; /* no change */
1438
5b191d99
SW		 1439 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1440 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1441 req->r_osd ? req->r_osd->o_osd : -1);
1442
d85b7056
SW		 1443 /* record full pg acting set */
1444 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1445 req->r_num_pg_osds = num;
1446
f24e9980
SW		 1447 if (req->r_osd) {
1448 __cancel_request(req);
1449 list_del_init(&req->r_osd_item);
a390de02 1450 list_del_init(&req->r_linger_osd_item);
f24e9980
SW		 1451 req->r_osd = NULL;
1452 }
1453
1454 req->r_osd = __lookup_osd(osdc, o);
1455 if (!req->r_osd && o >= 0) {
c99eb1c7 1456 err = -ENOMEM;
e10006f8 1457 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1458 if (!req->r_osd) {
1459 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1460 goto out;
6f6c7006 1461 }
f24e9980 1462
6f6c7006 1463 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1464 __insert_osd(osdc, req->r_osd);
1465
b7a9e5dd
SW		 1466 ceph_con_open(&req->r_osd->o_con,
1467 CEPH_ENTITY_TYPE_OSD, o,
1468 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1469 }
1470
f671b581 1471 __enqueue_request(req);
d85b7056 1472 err = 1; /* osd or pg changed */
f24e9980
SW		 1473
1474out:
f24e9980
SW		 1475 return err;
1476}
1477
1478/*
1479 * caller should hold map_sem (for read) and request_mutex
1480 */
56e925b6
SW		 1481static void __send_request(struct ceph_osd_client *osdc,
1482 struct ceph_osd_request *req)
f24e9980 1483{
1b83bef2 1484 void *p;
f24e9980 1485
1b83bef2
SW		 1486 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1487 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1488 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1489
1490 /* fill in message content that changes each time we send it */
1491 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1492 put_unaligned_le32(req->r_flags, req->r_request_flags);
205ee118 1493 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1b83bef2
SW		 1494 p = req->r_request_pgid;
1495 ceph_encode_64(&p, req->r_pgid.pool);
1496 ceph_encode_32(&p, req->r_pgid.seed);
1497 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1498 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1499 sizeof(req->r_reassert_version));
2169aea6 1500
3dd72fc0 1501 req->r_stamp = jiffies;
07a27e22 1502 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1503
1504 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1505
f24e9980 1506 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1507
1508 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1509}
1510
6f6c7006
SW		 1511/*
1512 * Send any requests in the queue (req_unsent).
1513 */
f9d25199 1514static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1515{
1516 struct ceph_osd_request *req, *tmp;
1517
f9d25199
AE		 1518 dout("__send_queued\n");
1519 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1520 __send_request(osdc, req);
6f6c7006
SW		 1521}
1522
0bbfdfe8
ID		 1523/*
1524 * Caller should hold map_sem for read and request_mutex.
1525 */
1526static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1527 struct ceph_osd_request *req,
1528 bool nofail)
1529{
1530 int rc;
1531
1532 __register_request(osdc, req);
1533 req->r_sent = 0;
1534 req->r_got_reply = 0;
1535 rc = __map_request(osdc, req, 0);
1536 if (rc < 0) {
1537 if (nofail) {
1538 dout("osdc_start_request failed map, "
1539 " will retry %lld\n", req->r_tid);
1540 rc = 0;
1541 } else {
1542 __unregister_request(osdc, req);
1543 }
1544 return rc;
1545 }
1546
1547 if (req->r_osd == NULL) {
1548 dout("send_request %p no up osds in pg\n", req);
1549 ceph_monc_request_next_osdmap(&osdc->client->monc);
1550 } else {
1551 __send_queued(osdc);
1552 }
1553
1554 return 0;
1555}
1556
f24e9980
SW		 1557/*
1558 * Timeout callback, called every N seconds when 1 or more osd
1559 * requests has been active for more than N seconds. When this
1560 * happens, we ping all OSDs with requests who have timed out to
1561 * ensure any communications channel reset is detected. Reset the
1562 * request timeouts another N seconds in the future as we go.
1563 * Reschedule the timeout event another N seconds in future (unless
1564 * there are no open requests).
1565 */
1566static void handle_timeout(struct work_struct *work)
1567{
1568 struct ceph_osd_client *osdc =
1569 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1570 struct ceph_osd_request *req;
f24e9980 1571 struct ceph_osd *osd;
422d2cb8 1572 unsigned long keepalive =
3d14c5d2 1573 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1574 struct list_head slow_osds;
f24e9980
SW		 1575 dout("timeout\n");
1576 down_read(&osdc->map_sem);
1577
1578 ceph_monc_request_next_osdmap(&osdc->client->monc);
1579
1580 mutex_lock(&osdc->request_mutex);
f24e9980 1581
422d2cb8
YS		 1582 /*
1583 * ping osds that are a bit slow. this ensures that if there
1584 * is a break in the TCP connection we will notice, and reopen
1585 * a connection with that osd (from the fault callback).
1586 */
1587 INIT_LIST_HEAD(&slow_osds);
1588 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1589 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1590 break;
1591
1592 osd = req->r_osd;
1593 BUG_ON(!osd);
1594 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1595 req->r_tid, osd->o_osd);
422d2cb8
YS		 1596 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1597 }
1598 while (!list_empty(&slow_osds)) {
1599 osd = list_entry(slow_osds.next, struct ceph_osd,
1600 o_keepalive_item);
1601 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1602 ceph_con_keepalive(&osd->o_con);
1603 }
1604
422d2cb8 1605 __schedule_osd_timeout(osdc);
f9d25199 1606 __send_queued(osdc);
f24e9980 1607 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1608 up_read(&osdc->map_sem);
1609}
1610
f5a2041b
YS		 1611static void handle_osds_timeout(struct work_struct *work)
1612{
1613 struct ceph_osd_client *osdc =
1614 container_of(work, struct ceph_osd_client,
1615 osds_timeout_work.work);
1616 unsigned long delay =
3d14c5d2 1617 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1618
1619 dout("osds timeout\n");
1620 down_read(&osdc->map_sem);
aca420bc 1621 remove_old_osds(osdc);
f5a2041b
YS		 1622 up_read(&osdc->map_sem);
1623
1624 schedule_delayed_work(&osdc->osds_timeout_work,
1625 round_jiffies_relative(delay));
1626}
1627
205ee118
ID		 1628static int ceph_oloc_decode(void **p, void *end,
1629 struct ceph_object_locator *oloc)
1630{
1631 u8 struct_v, struct_cv;
1632 u32 len;
1633 void *struct_end;
1634 int ret = 0;
1635
1636 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1637 struct_v = ceph_decode_8(p);
1638 struct_cv = ceph_decode_8(p);
1639 if (struct_v < 3) {
1640 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1641 struct_v, struct_cv);
1642 goto e_inval;
1643 }
1644 if (struct_cv > 6) {
1645 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1646 struct_v, struct_cv);
1647 goto e_inval;
1648 }
1649 len = ceph_decode_32(p);
1650 ceph_decode_need(p, end, len, e_inval);
1651 struct_end = *p + len;
1652
1653 oloc->pool = ceph_decode_64(p);
1654 *p += 4; /* skip preferred */
1655
1656 len = ceph_decode_32(p);
1657 if (len > 0) {
1658 pr_warn("ceph_object_locator::key is set\n");
1659 goto e_inval;
1660 }
1661
1662 if (struct_v >= 5) {
1663 len = ceph_decode_32(p);
1664 if (len > 0) {
1665 pr_warn("ceph_object_locator::nspace is set\n");
1666 goto e_inval;
1667 }
1668 }
1669
1670 if (struct_v >= 6) {
1671 s64 hash = ceph_decode_64(p);
1672 if (hash != -1) {
1673 pr_warn("ceph_object_locator::hash is set\n");
1674 goto e_inval;
1675 }
1676 }
1677
1678 /* skip the rest */
1679 *p = struct_end;
1680out:
1681 return ret;
1682
1683e_inval:
1684 ret = -EINVAL;
1685 goto out;
1686}
1687
1688static int ceph_redirect_decode(void **p, void *end,
1689 struct ceph_request_redirect *redir)
1690{
1691 u8 struct_v, struct_cv;
1692 u32 len;
1693 void *struct_end;
1694 int ret;
1695
1696 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1697 struct_v = ceph_decode_8(p);
1698 struct_cv = ceph_decode_8(p);
1699 if (struct_cv > 1) {
1700 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1701 struct_v, struct_cv);
1702 goto e_inval;
1703 }
1704 len = ceph_decode_32(p);
1705 ceph_decode_need(p, end, len, e_inval);
1706 struct_end = *p + len;
1707
1708 ret = ceph_oloc_decode(p, end, &redir->oloc);
1709 if (ret)
1710 goto out;
1711
1712 len = ceph_decode_32(p);
1713 if (len > 0) {
1714 pr_warn("ceph_request_redirect::object_name is set\n");
1715 goto e_inval;
1716 }
1717
1718 len = ceph_decode_32(p);
1719 *p += len; /* skip osd_instructions */
1720
1721 /* skip the rest */
1722 *p = struct_end;
1723out:
1724 return ret;
1725
1726e_inval:
1727 ret = -EINVAL;
1728 goto out;
1729}
1730
25845472
SW		 1731static void complete_request(struct ceph_osd_request *req)
1732{
25845472
SW		 1733 complete_all(&req->r_safe_completion); /* fsync waiter */
1734}
1735
f24e9980
SW		 1736/*
1737 * handle osd op reply. either call the callback if it is specified,
1738 * or do the completion to wake up the waiting thread.
1739 */
350b1c32
SW		 1740static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1741 struct ceph_connection *con)
f24e9980 1742{
1b83bef2 1743 void *p, *end;
f24e9980 1744 struct ceph_osd_request *req;
205ee118 1745 struct ceph_request_redirect redir;
f24e9980 1746 u64 tid;
1b83bef2 1747 int object_len;
79528734
AE		 1748 unsigned int numops;
1749 int payload_len, flags;
0ceed5db 1750 s32 result;
1b83bef2
SW		 1751 s32 retry_attempt;
1752 struct ceph_pg pg;
1753 int err;
1754 u32 reassert_epoch;
1755 u64 reassert_version;
1756 u32 osdmap_epoch;
0d5af164 1757 int already_completed;
9fc6e064 1758 u32 bytes;
79528734 1759 unsigned int i;
f24e9980 1760
6df058c0 1761 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1762 dout("handle_reply %p tid %llu\n", msg, tid);
1763
1764 p = msg->front.iov_base;
1765 end = p + msg->front.iov_len;
1766
1767 ceph_decode_need(&p, end, 4, bad);
1768 object_len = ceph_decode_32(&p);
1769 ceph_decode_need(&p, end, object_len, bad);
1770 p += object_len;
1771
ef4859d6 1772 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1773 if (err)
f24e9980 1774 goto bad;
1b83bef2
SW		 1775
1776 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1777 flags = ceph_decode_64(&p);
1778 result = ceph_decode_32(&p);
1779 reassert_epoch = ceph_decode_32(&p);
1780 reassert_version = ceph_decode_64(&p);
1781 osdmap_epoch = ceph_decode_32(&p);
1782
f24e9980 1783 /* lookup */
ff513ace 1784 down_read(&osdc->map_sem);
f24e9980
SW		 1785 mutex_lock(&osdc->request_mutex);
1786 req = __lookup_request(osdc, tid);
1787 if (req == NULL) {
1788 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1789 goto bad_mutex;
f24e9980
SW		 1790 }
1791 ceph_osdc_get_request(req);
1b83bef2
SW		 1792
1793 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1794 req, result);
1795
18741196 1796 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2
SW		 1797 numops = ceph_decode_32(&p);
1798 if (numops > CEPH_OSD_MAX_OP)
1799 goto bad_put;
1800 if (numops != req->r_num_ops)
1801 goto bad_put;
1802 payload_len = 0;
18741196 1803 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1804 for (i = 0; i < numops; i++) {
1805 struct ceph_osd_op *op = p;
1806 int len;
1807
1808 len = le32_to_cpu(op->payload_len);
1809 req->r_reply_op_len[i] = len;
1810 dout(" op %d has %d bytes\n", i, len);
1811 payload_len += len;
1812 p += sizeof(*op);
1813 }
9fc6e064
AE		 1814 bytes = le32_to_cpu(msg->hdr.data_len);
1815 if (payload_len != bytes) {
b9a67899
JP		 1816 pr_warn("sum of op payload lens %d != data_len %d\n",
1817 payload_len, bytes);
1b83bef2
SW		 1818 goto bad_put;
1819 }
1820
18741196 1821 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1822 retry_attempt = ceph_decode_32(&p);
1823 for (i = 0; i < numops; i++)
1824 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1825
205ee118
ID		 1826 if (le16_to_cpu(msg->hdr.version) >= 6) {
1827 p += 8 + 4; /* skip replay_version */
1828 p += 8; /* skip user_version */
eb845ff1 1829
205ee118
ID		 1830 err = ceph_redirect_decode(&p, end, &redir);
1831 if (err)
1832 goto bad_put;
1833 } else {
1834 redir.oloc.pool = -1;
1835 }
f24e9980 1836
205ee118
ID		 1837 if (redir.oloc.pool != -1) {
1838 dout("redirect pool %lld\n", redir.oloc.pool);
1839
1840 __unregister_request(osdc, req);
205ee118
ID		 1841
1842 req->r_target_oloc = redir.oloc; /* struct */
1843
1844 /*
1845 * Start redirect requests with nofail=true. If
1846 * mapping fails, request will end up on the notarget
1847 * list, waiting for the new osdmap (which can take
1848 * a while), even though the original request mapped
1849 * successfully. In the future we might want to follow
1850 * original request's nofail setting here.
1851 */
ff513ace 1852 err = __ceph_osdc_start_request(osdc, req, true);
205ee118
ID		 1853 BUG_ON(err);
1854
ff513ace 1855 goto out_unlock;
205ee118
ID		 1856 }
1857
1858 already_completed = req->r_got_reply;
1859 if (!req->r_got_reply) {
1b83bef2 1860 req->r_result = result;
f24e9980
SW		 1861 dout("handle_reply result %d bytes %d\n", req->r_result,
1862 bytes);
1863 if (req->r_result == 0)
1864 req->r_result = bytes;
1865
1866 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1867 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1868 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1869
1870 req->r_got_reply = 1;
1871 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1872 dout("handle_reply tid %llu dup ack\n", tid);
ff513ace 1873 goto out_unlock;
f24e9980
SW		 1874 }
1875
1876 dout("handle_reply tid %llu flags %d\n", tid, flags);
1877
a40c4f10
YS		 1878 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1879 __register_linger_request(osdc, req);
1880
f24e9980 1881 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1882 if (result < 0 ||
1883 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1884 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1885 __unregister_request(osdc, req);
1886
1887 mutex_unlock(&osdc->request_mutex);
ff513ace 1888 up_read(&osdc->map_sem);
f24e9980 1889
eb845ff1 1890 if (!already_completed) {
61c5d6bf
YZ		 1891 if (req->r_unsafe_callback &&
1892 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1893 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1894 if (req->r_callback)
1895 req->r_callback(req, msg);
1896 else
1897 complete_all(&req->r_completion);
1898 }
f24e9980 1899
61c5d6bf
YZ		 1900 if (flags & CEPH_OSD_FLAG_ONDISK) {
1901 if (req->r_unsafe_callback && already_completed)
1902 req->r_unsafe_callback(req, false);
25845472 1903 complete_request(req);
61c5d6bf 1904 }
f24e9980 1905
ff513ace 1906out:
a40c4f10 1907 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1908 ceph_osdc_put_request(req);
1909 return;
ff513ace
ID		 1910out_unlock:
1911 mutex_unlock(&osdc->request_mutex);
1912 up_read(&osdc->map_sem);
1913 goto out;
f24e9980 1914
1b83bef2 1915bad_put:
37c89bde
LW		 1916 req->r_result = -EIO;
1917 __unregister_request(osdc, req);
1918 if (req->r_callback)
1919 req->r_callback(req, msg);
1920 else
1921 complete_all(&req->r_completion);
1922 complete_request(req);
1b83bef2 1923 ceph_osdc_put_request(req);
8058fd45
AE		 1924bad_mutex:
1925 mutex_unlock(&osdc->request_mutex);
ff513ace 1926 up_read(&osdc->map_sem);
f24e9980 1927bad:
1b83bef2
SW		 1928 pr_err("corrupt osd_op_reply got %d %d\n",
1929 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1930 ceph_msg_dump(msg);
f24e9980
SW		 1931}
1932
6f6c7006 1933static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1934{
f24e9980 1935 struct rb_node *p, *n;
f24e9980 1936
7eb71e03 1937 dout("%s %p\n", __func__, osdc);
6f6c7006
SW		 1938 for (p = rb_first(&osdc->osds); p; p = n) {
1939 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1940
6f6c7006
SW		 1941 n = rb_next(p);
1942 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1943 memcmp(&osd->o_con.peer_addr,
1944 ceph_osd_addr(osdc->osdmap,
1945 osd->o_osd),
1946 sizeof(struct ceph_entity_addr)) != 0)
1947 __reset_osd(osdc, osd);
f24e9980 1948 }
422d2cb8
YS		 1949}
1950
1951/*
6f6c7006
SW		 1952 * Requeue requests whose mapping to an OSD has changed. If requests map to
1953 * no osd, request a new map.
422d2cb8 1954 *
e6d50f67 1955 * Caller should hold map_sem for read.
422d2cb8 1956 */
9a1ea2db
JD		 1957static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1958 bool force_resend_writes)
422d2cb8 1959{
a40c4f10 1960 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1961 struct rb_node *p;
1962 int needmap = 0;
1963 int err;
9a1ea2db 1964 bool force_resend_req;
422d2cb8 1965
9a1ea2db
JD		 1966 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1967 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1968 mutex_lock(&osdc->request_mutex);
6194ea89 1969 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1970 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1971 p = rb_next(p);
ab60b16d
AE		 1972
1973 /*
1974 * For linger requests that have not yet been
1975 * registered, move them to the linger list; they'll
1976 * be sent to the osd in the loop below. Unregister
1977 * the request before re-registering it as a linger
1978 * request to ensure the __map_request() below
1979 * will decide it needs to be sent.
1980 */
1981 if (req->r_linger && list_empty(&req->r_linger_item)) {
1982 dout("%p tid %llu restart on osd%d\n",
1983 req, req->r_tid,
1984 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 1985 ceph_osdc_get_request(req);
ab60b16d
AE		 1986 __unregister_request(osdc, req);
1987 __register_linger_request(osdc, req);
96e4dac6 1988 ceph_osdc_put_request(req);
ab60b16d
AE		 1989 continue;
1990 }
1991
9a1ea2db
JD		 1992 force_resend_req = force_resend ||
1993 (force_resend_writes &&
1994 req->r_flags & CEPH_OSD_FLAG_WRITE);
1995 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 1996 if (err < 0)
1997 continue; /* error */
1998 if (req->r_osd == NULL) {
1999 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
2000 needmap++; /* request a newer map */
2001 } else if (err > 0) {
6194ea89
SW		 2002 if (!req->r_linger) {
2003 dout("%p tid %llu requeued on osd%d\n", req,
2004 req->r_tid,
2005 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 2006 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 2007 }
2008 }
a40c4f10
YS		 2009 }
2010
2011 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
2012 r_linger_item) {
2013 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
2014
9a1ea2db
JD		 2015 err = __map_request(osdc, req,
2016 force_resend || force_resend_writes);
ab60b16d 2017 dout("__map_request returned %d\n", err);
a40c4f10
YS		 2018 if (err < 0)
2019 continue; /* hrm! */
b0494532
ID		 2020 if (req->r_osd == NULL || err > 0) {
2021 if (req->r_osd == NULL) {
2022 dout("lingering %p tid %llu maps to no osd\n",
2023 req, req->r_tid);
2024 /*
2025 * A homeless lingering request makes
2026 * no sense, as it's job is to keep
2027 * a particular OSD connection open.
2028 * Request a newer map and kick the
2029 * request, knowing that it won't be
2030 * resent until we actually get a map
2031 * that can tell us where to send it.
2032 */
2033 needmap++;
2034 }
a40c4f10 2035
b0494532
ID		 2036 dout("kicking lingering %p tid %llu osd%d\n", req,
2037 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1);
2038 __register_request(osdc, req);
2039 __unregister_linger_request(osdc, req);
2040 }
6f6c7006 2041 }
14d2f38d 2042 reset_changed_osds(osdc);
f24e9980
SW		 2043 mutex_unlock(&osdc->request_mutex);
2044
2045 if (needmap) {
2046 dout("%d requests for down osds, need new map\n", needmap);
2047 ceph_monc_request_next_osdmap(&osdc->client->monc);
2048 }
422d2cb8 2049}
6f6c7006
SW		 2050
2051
f24e9980
SW		 2052/*
2053 * Process updated osd map.
2054 *
2055 * The message contains any number of incremental and full maps, normally
2056 * indicating some sort of topology change in the cluster. Kick requests
2057 * off to different OSDs as needed.
2058 */
2059void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2060{
2061 void *p, *end, *next;
2062 u32 nr_maps, maplen;
2063 u32 epoch;
2064 struct ceph_osdmap *newmap = NULL, *oldmap;
2065 int err;
2066 struct ceph_fsid fsid;
9a1ea2db 2067 bool was_full;
f24e9980
SW		 2068
2069 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2070 p = msg->front.iov_base;
2071 end = p + msg->front.iov_len;
2072
2073 /* verify fsid */
2074 ceph_decode_need(&p, end, sizeof(fsid), bad);
2075 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 2076 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2077 return;
f24e9980
SW		 2078
2079 down_write(&osdc->map_sem);
2080
9a1ea2db
JD		 2081 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2082
f24e9980
SW		 2083 /* incremental maps */
2084 ceph_decode_32_safe(&p, end, nr_maps, bad);
2085 dout(" %d inc maps\n", nr_maps);
2086 while (nr_maps > 0) {
2087 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2088 epoch = ceph_decode_32(&p);
2089 maplen = ceph_decode_32(&p);
f24e9980
SW		 2090 ceph_decode_need(&p, end, maplen, bad);
2091 next = p + maplen;
2092 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2093 dout("applying incremental map %u len %d\n",
2094 epoch, maplen);
2095 newmap = osdmap_apply_incremental(&p, next,
2096 osdc->osdmap,
15d9882c 2097 &osdc->client->msgr);
f24e9980
SW		 2098 if (IS_ERR(newmap)) {
2099 err = PTR_ERR(newmap);
2100 goto bad;
2101 }
30dc6381 2102 BUG_ON(!newmap);
f24e9980
SW		 2103 if (newmap != osdc->osdmap) {
2104 ceph_osdmap_destroy(osdc->osdmap);
2105 osdc->osdmap = newmap;
2106 }
9a1ea2db
JD		 2107 was_full = was_full ||
2108 ceph_osdmap_flag(osdc->osdmap,
2109 CEPH_OSDMAP_FULL);
2110 kick_requests(osdc, 0, was_full);
f24e9980
SW		 2111 } else {
2112 dout("ignoring incremental map %u len %d\n",
2113 epoch, maplen);
2114 }
2115 p = next;
2116 nr_maps--;
2117 }
2118 if (newmap)
2119 goto done;
2120
2121 /* full maps */
2122 ceph_decode_32_safe(&p, end, nr_maps, bad);
2123 dout(" %d full maps\n", nr_maps);
2124 while (nr_maps) {
2125 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2126 epoch = ceph_decode_32(&p);
2127 maplen = ceph_decode_32(&p);
f24e9980
SW		 2128 ceph_decode_need(&p, end, maplen, bad);
2129 if (nr_maps > 1) {
2130 dout("skipping non-latest full map %u len %d\n",
2131 epoch, maplen);
2132 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2133 dout("skipping full map %u len %d, "
2134 "older than our %u\n", epoch, maplen,
2135 osdc->osdmap->epoch);
2136 } else {
38d6453c
SW		 2137 int skipped_map = 0;
2138
f24e9980 2139 dout("taking full map %u len %d\n", epoch, maplen);
a2505d63 2140 newmap = ceph_osdmap_decode(&p, p+maplen);
f24e9980
SW		 2141 if (IS_ERR(newmap)) {
2142 err = PTR_ERR(newmap);
2143 goto bad;
2144 }
30dc6381 2145 BUG_ON(!newmap);
f24e9980
SW		 2146 oldmap = osdc->osdmap;
2147 osdc->osdmap = newmap;
38d6453c
SW		 2148 if (oldmap) {
2149 if (oldmap->epoch + 1 < newmap->epoch)
2150 skipped_map = 1;
f24e9980 2151 ceph_osdmap_destroy(oldmap);
38d6453c 2152 }
9a1ea2db
JD		 2153 was_full = was_full ||
2154 ceph_osdmap_flag(osdc->osdmap,
2155 CEPH_OSDMAP_FULL);
2156 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2157 }
2158 p += maplen;
2159 nr_maps--;
2160 }
2161
b72e19b9
DC		 2162 if (!osdc->osdmap)
2163 goto bad;
f24e9980
SW		 2164done:
2165 downgrade_write(&osdc->map_sem);
2166 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 2167
2168 /*
2169 * subscribe to subsequent osdmap updates if full to ensure
2170 * we find out when we are no longer full and stop returning
2171 * ENOSPC.
2172 */
d29adb34
JD		 2173 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2174 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2175 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2176 ceph_monc_request_next_osdmap(&osdc->client->monc);
2177
f9d25199
AE		 2178 mutex_lock(&osdc->request_mutex);
2179 __send_queued(osdc);
2180 mutex_unlock(&osdc->request_mutex);
f24e9980 2181 up_read(&osdc->map_sem);
03066f23 2182 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2183 return;
2184
2185bad:
2186 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2187 ceph_msg_dump(msg);
f24e9980 2188 up_write(&osdc->map_sem);
f24e9980
SW		 2189}
2190
a40c4f10
YS		 2191/*
2192 * watch/notify callback event infrastructure
2193 *
2194 * These callbacks are used both for watch and notify operations.
2195 */
2196static void __release_event(struct kref *kref)
2197{
2198 struct ceph_osd_event *event =
2199 container_of(kref, struct ceph_osd_event, kref);
2200
2201 dout("__release_event %p\n", event);
2202 kfree(event);
2203}
2204
2205static void get_event(struct ceph_osd_event *event)
2206{
2207 kref_get(&event->kref);
2208}
2209
2210void ceph_osdc_put_event(struct ceph_osd_event *event)
2211{
2212 kref_put(&event->kref, __release_event);
2213}
2214EXPORT_SYMBOL(ceph_osdc_put_event);
2215
2216static void __insert_event(struct ceph_osd_client *osdc,
2217 struct ceph_osd_event *new)
2218{
2219 struct rb_node **p = &osdc->event_tree.rb_node;
2220 struct rb_node *parent = NULL;
2221 struct ceph_osd_event *event = NULL;
2222
2223 while (*p) {
2224 parent = *p;
2225 event = rb_entry(parent, struct ceph_osd_event, node);
2226 if (new->cookie < event->cookie)
2227 p = &(*p)->rb_left;
2228 else if (new->cookie > event->cookie)
2229 p = &(*p)->rb_right;
2230 else
2231 BUG();
2232 }
2233
2234 rb_link_node(&new->node, parent, p);
2235 rb_insert_color(&new->node, &osdc->event_tree);
2236}
2237
2238static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2239 u64 cookie)
2240{
2241 struct rb_node **p = &osdc->event_tree.rb_node;
2242 struct rb_node *parent = NULL;
2243 struct ceph_osd_event *event = NULL;
2244
2245 while (*p) {
2246 parent = *p;
2247 event = rb_entry(parent, struct ceph_osd_event, node);
2248 if (cookie < event->cookie)
2249 p = &(*p)->rb_left;
2250 else if (cookie > event->cookie)
2251 p = &(*p)->rb_right;
2252 else
2253 return event;
2254 }
2255 return NULL;
2256}
2257
2258static void __remove_event(struct ceph_osd_event *event)
2259{
2260 struct ceph_osd_client *osdc = event->osdc;
2261
2262 if (!RB_EMPTY_NODE(&event->node)) {
2263 dout("__remove_event removed %p\n", event);
2264 rb_erase(&event->node, &osdc->event_tree);
2265 ceph_osdc_put_event(event);
2266 } else {
2267 dout("__remove_event didn't remove %p\n", event);
2268 }
2269}
2270
2271int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2272 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2273 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2274{
2275 struct ceph_osd_event *event;
2276
2277 event = kmalloc(sizeof(*event), GFP_NOIO);
2278 if (!event)
2279 return -ENOMEM;
2280
2281 dout("create_event %p\n", event);
2282 event->cb = event_cb;
3c663bbd 2283 event->one_shot = 0;
a40c4f10
YS		 2284 event->data = data;
2285 event->osdc = osdc;
2286 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2287 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2288 kref_init(&event->kref); /* one ref for us */
2289 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2290
2291 spin_lock(&osdc->event_lock);
2292 event->cookie = ++osdc->event_count;
2293 __insert_event(osdc, event);
2294 spin_unlock(&osdc->event_lock);
2295
2296 *pevent = event;
2297 return 0;
2298}
2299EXPORT_SYMBOL(ceph_osdc_create_event);
2300
2301void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2302{
2303 struct ceph_osd_client *osdc = event->osdc;
2304
2305 dout("cancel_event %p\n", event);
2306 spin_lock(&osdc->event_lock);
2307 __remove_event(event);
2308 spin_unlock(&osdc->event_lock);
2309 ceph_osdc_put_event(event); /* caller's */
2310}
2311EXPORT_SYMBOL(ceph_osdc_cancel_event);
2312
2313
2314static void do_event_work(struct work_struct *work)
2315{
2316 struct ceph_osd_event_work *event_work =
2317 container_of(work, struct ceph_osd_event_work, work);
2318 struct ceph_osd_event *event = event_work->event;
2319 u64 ver = event_work->ver;
2320 u64 notify_id = event_work->notify_id;
2321 u8 opcode = event_work->opcode;
2322
2323 dout("do_event_work completing %p\n", event);
2324 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2325 dout("do_event_work completed %p\n", event);
2326 ceph_osdc_put_event(event);
2327 kfree(event_work);
2328}
2329
2330
2331/*
2332 * Process osd watch notifications
2333 */
3c663bbd
AE		 2334static void handle_watch_notify(struct ceph_osd_client *osdc,
2335 struct ceph_msg *msg)
a40c4f10
YS		 2336{
2337 void *p, *end;
2338 u8 proto_ver;
2339 u64 cookie, ver, notify_id;
2340 u8 opcode;
2341 struct ceph_osd_event *event;
2342 struct ceph_osd_event_work *event_work;
2343
2344 p = msg->front.iov_base;
2345 end = p + msg->front.iov_len;
2346
2347 ceph_decode_8_safe(&p, end, proto_ver, bad);
2348 ceph_decode_8_safe(&p, end, opcode, bad);
2349 ceph_decode_64_safe(&p, end, cookie, bad);
2350 ceph_decode_64_safe(&p, end, ver, bad);
2351 ceph_decode_64_safe(&p, end, notify_id, bad);
2352
2353 spin_lock(&osdc->event_lock);
2354 event = __find_event(osdc, cookie);
2355 if (event) {
3c663bbd 2356 BUG_ON(event->one_shot);
a40c4f10 2357 get_event(event);
a40c4f10
YS		 2358 }
2359 spin_unlock(&osdc->event_lock);
2360 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2361 cookie, ver, event);
2362 if (event) {
2363 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10 2364 if (!event_work) {
91883cd2
ID		 2365 pr_err("couldn't allocate event_work\n");
2366 ceph_osdc_put_event(event);
2367 return;
a40c4f10 2368 }
6b0ae409 2369 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2370 event_work->event = event;
2371 event_work->ver = ver;
2372 event_work->notify_id = notify_id;
2373 event_work->opcode = opcode;
a40c4f10 2374
91883cd2
ID		 2375 queue_work(osdc->notify_wq, &event_work->work);
2376 }
a40c4f10 2377
a40c4f10
YS		 2378 return;
2379
2380bad:
2381 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 2382}
2383
e65550fd
AE		 2384/*
2385 * build new request AND message
2386 *
2387 */
2388void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2389 struct ceph_snap_context *snapc, u64 snap_id,
2390 struct timespec *mtime)
2391{
2392 struct ceph_msg *msg = req->r_request;
2393 void *p;
2394 size_t msg_size;
2395 int flags = req->r_flags;
2396 u64 data_len;
2397 unsigned int i;
2398
2399 req->r_snapid = snap_id;
2400 req->r_snapc = ceph_get_snap_context(snapc);
2401
2402 /* encode request */
2403 msg->hdr.version = cpu_to_le16(4);
2404
2405 p = msg->front.iov_base;
2406 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2407 req->r_request_osdmap_epoch = p;
2408 p += 4;
2409 req->r_request_flags = p;
2410 p += 4;
2411 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2412 ceph_encode_timespec(p, mtime);
2413 p += sizeof(struct ceph_timespec);
2414 req->r_request_reassert_version = p;
2415 p += sizeof(struct ceph_eversion); /* will get filled in */
2416
2417 /* oloc */
2418 ceph_encode_8(&p, 4);
2419 ceph_encode_8(&p, 4);
2420 ceph_encode_32(&p, 8 + 4 + 4);
2421 req->r_request_pool = p;
2422 p += 8;
2423 ceph_encode_32(&p, -1); /* preferred */
2424 ceph_encode_32(&p, 0); /* key len */
2425
2426 ceph_encode_8(&p, 1);
2427 req->r_request_pgid = p;
2428 p += 8 + 4;
2429 ceph_encode_32(&p, -1); /* preferred */
2430
2431 /* oid */
3c972c95
ID		 2432 ceph_encode_32(&p, req->r_base_oid.name_len);
2433 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2434 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2435 req->r_base_oid.name, req->r_base_oid.name_len);
2436 p += req->r_base_oid.name_len;
e65550fd
AE		 2437
2438 /* ops--can imply data */
2439 ceph_encode_16(&p, (u16)req->r_num_ops);
2440 data_len = 0;
2441 for (i = 0; i < req->r_num_ops; i++) {
2442 data_len += osd_req_encode_op(req, p, i);
2443 p += sizeof(struct ceph_osd_op);
2444 }
2445
2446 /* snaps */
2447 ceph_encode_64(&p, req->r_snapid);
2448 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2449 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2450 if (req->r_snapc) {
2451 for (i = 0; i < snapc->num_snaps; i++) {
2452 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2453 }
2454 }
2455
2456 req->r_request_attempts = p;
2457 p += 4;
2458
2459 /* data */
2460 if (flags & CEPH_OSD_FLAG_WRITE) {
2461 u16 data_off;
2462
2463 /*
2464 * The header "data_off" is a hint to the receiver
2465 * allowing it to align received data into its
2466 * buffers such that there's no need to re-copy
2467 * it before writing it to disk (direct I/O).
2468 */
2469 data_off = (u16) (off & 0xffff);
2470 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2471 }
2472 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2473
2474 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2475 msg_size = p - msg->front.iov_base;
2476 msg->front.iov_len = msg_size;
2477 msg->hdr.front_len = cpu_to_le32(msg_size);
2478
2479 dout("build_request msg_size was %d\n", (int)msg_size);
2480}
2481EXPORT_SYMBOL(ceph_osdc_build_request);
2482
70636773
AE		 2483/*
2484 * Register request, send initial attempt.
2485 */
2486int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2487 struct ceph_osd_request *req,
2488 bool nofail)
2489{
0bbfdfe8 2490 int rc;
70636773 2491
f24e9980
SW		 2492 down_read(&osdc->map_sem);
2493 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2494
2495 rc = __ceph_osdc_start_request(osdc, req, nofail);
2496
f24e9980
SW		 2497 mutex_unlock(&osdc->request_mutex);
2498 up_read(&osdc->map_sem);
0bbfdfe8 2499
f24e9980
SW		 2500 return rc;
2501}
3d14c5d2 2502EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 2503
c9f9b93d
ID		 2504/*
2505 * Unregister a registered request. The request is not completed (i.e.
2506 * no callbacks or wakeups) - higher layers are supposed to know what
2507 * they are canceling.
2508 */
2509void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2510{
2511 struct ceph_osd_client *osdc = req->r_osdc;
2512
2513 mutex_lock(&osdc->request_mutex);
2514 if (req->r_linger)
2515 __unregister_linger_request(osdc, req);
2516 __unregister_request(osdc, req);
2517 mutex_unlock(&osdc->request_mutex);
2518
2519 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2520}
2521EXPORT_SYMBOL(ceph_osdc_cancel_request);
2522
f24e9980
SW		 2523/*
2524 * wait for a request to complete
2525 */
2526int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2527 struct ceph_osd_request *req)
2528{
2529 int rc;
2530
c9f9b93d
ID		 2531 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2532
f24e9980
SW		 2533 rc = wait_for_completion_interruptible(&req->r_completion);
2534 if (rc < 0) {
c9f9b93d
ID		 2535 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2536 ceph_osdc_cancel_request(req);
25845472 2537 complete_request(req);
f24e9980
SW		 2538 return rc;
2539 }
2540
c9f9b93d
ID		 2541 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2542 req->r_result);
f24e9980
SW		 2543 return req->r_result;
2544}
3d14c5d2 2545EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2546
2547/*
2548 * sync - wait for all in-flight requests to flush. avoid starvation.
2549 */
2550void ceph_osdc_sync(struct ceph_osd_client *osdc)
2551{
2552 struct ceph_osd_request *req;
2553 u64 last_tid, next_tid = 0;
2554
2555 mutex_lock(&osdc->request_mutex);
2556 last_tid = osdc->last_tid;
2557 while (1) {
2558 req = __lookup_request_ge(osdc, next_tid);
2559 if (!req)
2560 break;
2561 if (req->r_tid > last_tid)
2562 break;
2563
2564 next_tid = req->r_tid + 1;
2565 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2566 continue;
2567
2568 ceph_osdc_get_request(req);
2569 mutex_unlock(&osdc->request_mutex);
2570 dout("sync waiting on tid %llu (last is %llu)\n",
2571 req->r_tid, last_tid);
2572 wait_for_completion(&req->r_safe_completion);
2573 mutex_lock(&osdc->request_mutex);
2574 ceph_osdc_put_request(req);
2575 }
2576 mutex_unlock(&osdc->request_mutex);
2577 dout("sync done (thru tid %llu)\n", last_tid);
2578}
3d14c5d2 2579EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2580
dd935f44
JD		 2581/*
2582 * Call all pending notify callbacks - for use after a watch is
2583 * unregistered, to make sure no more callbacks for it will be invoked
2584 */
f6479449 2585void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44
JD		 2586{
2587 flush_workqueue(osdc->notify_wq);
2588}
2589EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2590
2591
f24e9980
SW		 2592/*
2593 * init, shutdown
2594 */
2595int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2596{
2597 int err;
2598
2599 dout("init\n");
2600 osdc->client = client;
2601 osdc->osdmap = NULL;
2602 init_rwsem(&osdc->map_sem);
2603 init_completion(&osdc->map_waiters);
2604 osdc->last_requested_map = 0;
2605 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2606 osdc->last_tid = 0;
2607 osdc->osds = RB_ROOT;
f5a2041b 2608 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2609 osdc->requests = RB_ROOT;
422d2cb8 2610 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2611 INIT_LIST_HEAD(&osdc->req_unsent);
2612 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2613 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2614 osdc->num_requests = 0;
2615 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2616 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2617 spin_lock_init(&osdc->event_lock);
2618 osdc->event_tree = RB_ROOT;
2619 osdc->event_count = 0;
f5a2041b
YS		 2620
2621 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2622 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2623
5f44f142 2624 err = -ENOMEM;
f24e9980
SW		 2625 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2626 sizeof(struct ceph_osd_request));
2627 if (!osdc->req_mempool)
5f44f142 2628 goto out;
f24e9980 2629
d50b409f
SW		 2630 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2631 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2632 "osd_op");
f24e9980 2633 if (err < 0)
5f44f142 2634 goto out_mempool;
d50b409f 2635 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2636 OSD_OPREPLY_FRONT_LEN, 10, true,
2637 "osd_op_reply");
c16e7869
SW		 2638 if (err < 0)
2639 goto out_msgpool;
a40c4f10 2640
dbcae088 2641 err = -ENOMEM;
a40c4f10 2642 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2643 if (!osdc->notify_wq)
c172ec5c
ID		 2644 goto out_msgpool_reply;
2645
f24e9980 2646 return 0;
5f44f142 2647
c172ec5c
ID		 2648out_msgpool_reply:
2649 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2650out_msgpool:
2651 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2652out_mempool:
2653 mempool_destroy(osdc->req_mempool);
2654out:
2655 return err;
f24e9980
SW		 2656}
2657
2658void ceph_osdc_stop(struct ceph_osd_client *osdc)
2659{
a40c4f10
YS		 2660 flush_workqueue(osdc->notify_wq);
2661 destroy_workqueue(osdc->notify_wq);
f24e9980 2662 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2663 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2664 if (osdc->osdmap) {
2665 ceph_osdmap_destroy(osdc->osdmap);
2666 osdc->osdmap = NULL;
2667 }
aca420bc 2668 remove_all_osds(osdc);
f24e9980
SW		 2669 mempool_destroy(osdc->req_mempool);
2670 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2671 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2672}
2673
2674/*
2675 * Read some contiguous pages. If we cross a stripe boundary, shorten
2676 * *plen. Return number of bytes read, or error.
2677 */
2678int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2679 struct ceph_vino vino, struct ceph_file_layout *layout,
2680 u64 off, u64 *plen,
2681 u32 truncate_seq, u64 truncate_size,
b7495fc2 2682 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2683{
2684 struct ceph_osd_request *req;
2685 int rc = 0;
2686
2687 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2688 vino.snap, off, *plen);
715e4cd4 2689 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 2690 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2691 NULL, truncate_seq, truncate_size,
153e5167 2692 false);
6816282d
SW		 2693 if (IS_ERR(req))
2694 return PTR_ERR(req);
f24e9980
SW		 2695
2696 /* it may be a short read due to an object boundary */
0fff87ec 2697
406e2c9f 2698 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2699 pages, *plen, page_align, false, false);
f24e9980 2700
e0c59487 2701 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2702 off, *plen, *plen, page_align);
f24e9980 2703
79528734 2704 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2705
f24e9980
SW		 2706 rc = ceph_osdc_start_request(osdc, req, false);
2707 if (!rc)
2708 rc = ceph_osdc_wait_request(osdc, req);
2709
2710 ceph_osdc_put_request(req);
2711 dout("readpages result %d\n", rc);
2712 return rc;
2713}
3d14c5d2 2714EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2715
2716/*
2717 * do a synchronous write on N pages
2718 */
2719int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2720 struct ceph_file_layout *layout,
2721 struct ceph_snap_context *snapc,
2722 u64 off, u64 len,
2723 u32 truncate_seq, u64 truncate_size,
2724 struct timespec *mtime,
24808826 2725 struct page **pages, int num_pages)
f24e9980
SW		 2726{
2727 struct ceph_osd_request *req;
2728 int rc = 0;
b7495fc2 2729 int page_align = off & ~PAGE_MASK;
f24e9980 2730
acead002 2731 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
715e4cd4 2732 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
f24e9980 2733 CEPH_OSD_OP_WRITE,
24808826 2734 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2735 snapc, truncate_seq, truncate_size,
153e5167 2736 true);
6816282d
SW		 2737 if (IS_ERR(req))
2738 return PTR_ERR(req);
f24e9980
SW		 2739
2740 /* it may be a short write due to an object boundary */
406e2c9f 2741 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2742 false, false);
2743 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2744
79528734 2745 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2746
87f979d3 2747 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2748 if (!rc)
2749 rc = ceph_osdc_wait_request(osdc, req);
2750
2751 ceph_osdc_put_request(req);
2752 if (rc == 0)
2753 rc = len;
2754 dout("writepages result %d\n", rc);
2755 return rc;
2756}
3d14c5d2 2757EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2758
5522ae0b
AE		 2759int ceph_osdc_setup(void)
2760{
2761 BUG_ON(ceph_osd_request_cache);
2762 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2763 sizeof (struct ceph_osd_request),
2764 __alignof__(struct ceph_osd_request),
2765 0, NULL);
2766
2767 return ceph_osd_request_cache ? 0 : -ENOMEM;
2768}
2769EXPORT_SYMBOL(ceph_osdc_setup);
2770
2771void ceph_osdc_cleanup(void)
2772{
2773 BUG_ON(!ceph_osd_request_cache);
2774 kmem_cache_destroy(ceph_osd_request_cache);
2775 ceph_osd_request_cache = NULL;
2776}
2777EXPORT_SYMBOL(ceph_osdc_cleanup);
2778
f24e9980
SW		 2779/*
2780 * handle incoming message
2781 */
2782static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2783{
2784 struct ceph_osd *osd = con->private;
32c895e7 2785 struct ceph_osd_client *osdc;
f24e9980
SW		 2786 int type = le16_to_cpu(msg->hdr.type);
2787
2788 if (!osd)
4a32f93d 2789 goto out;
32c895e7 2790 osdc = osd->o_osdc;
f24e9980
SW		 2791
2792 switch (type) {
2793 case CEPH_MSG_OSD_MAP:
2794 ceph_osdc_handle_map(osdc, msg);
2795 break;
2796 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2797 handle_reply(osdc, msg, con);
f24e9980 2798 break;
a40c4f10
YS		 2799 case CEPH_MSG_WATCH_NOTIFY:
2800 handle_watch_notify(osdc, msg);
2801 break;
f24e9980
SW		 2802
2803 default:
2804 pr_err("received unknown message type %d %s\n", type,
2805 ceph_msg_type_name(type));
2806 }
4a32f93d 2807out:
f24e9980
SW		 2808 ceph_msg_put(msg);
2809}
2810
5b3a4db3 2811/*
21b667f6
SW		 2812 * lookup and return message for incoming reply. set up reply message
2813 * pages.
5b3a4db3
SW		 2814 */
2815static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2816 struct ceph_msg_header *hdr,
2817 int *skip)
f24e9980
SW		 2818{
2819 struct ceph_osd *osd = con->private;
2820 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2821 struct ceph_msg *m;
0547a9b3 2822 struct ceph_osd_request *req;
3f0a4ac5 2823 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2824 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2825 u64 tid;
f24e9980 2826
0547a9b3
YS		 2827 tid = le64_to_cpu(hdr->tid);
2828 mutex_lock(&osdc->request_mutex);
2829 req = __lookup_request(osdc, tid);
2830 if (!req) {
2831 *skip = 1;
2832 m = NULL;
756a16a5
SW		 2833 dout("get_reply unknown tid %llu from osd%d\n", tid,
2834 osd->o_osd);
0547a9b3
YS		 2835 goto out;
2836 }
c16e7869 2837
ace6d3a9 2838 if (req->r_reply->con)
8921d114 2839 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2840 req->r_reply, req->r_reply->con);
2841 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2842
f2be82b0 2843 if (front_len > req->r_reply->front_alloc_len) {
b9a67899
JP		 2844 pr_warn("get_reply front %d > preallocated %d (%u#%llu)\n",
2845 front_len, req->r_reply->front_alloc_len,
2846 (unsigned int)con->peer_name.type,
2847 le64_to_cpu(con->peer_name.num));
3f0a4ac5
ID		 2848 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2849 false);
a79832f2 2850 if (!m)
c16e7869
SW		 2851 goto out;
2852 ceph_msg_put(req->r_reply);
2853 req->r_reply = m;
2854 }
2855 m = ceph_msg_get(req->r_reply);
2856
0547a9b3 2857 if (data_len > 0) {
a4ce40a9 2858 struct ceph_osd_data *osd_data;
0fff87ec 2859
a4ce40a9
AE		 2860 /*
2861 * XXX This is assuming there is only one op containing
2862 * XXX page data. Probably OK for reads, but this
2863 * XXX ought to be done more generally.
2864 */
406e2c9f 2865 osd_data = osd_req_op_extent_osd_data(req, 0);
0fff87ec 2866 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2867 if (osd_data->pages &&
e0c59487 2868 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2869
b9a67899 2870 pr_warn("tid %lld reply has %d bytes we had only %llu bytes ready\n",
e0c59487 2871 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2872 *skip = 1;
2873 ceph_msg_put(m);
2874 m = NULL;
2875 goto out;
2876 }
2ac2b7a6 2877 }
0547a9b3 2878 }
5b3a4db3 2879 *skip = 0;
c16e7869 2880 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2881
2882out:
2883 mutex_unlock(&osdc->request_mutex);
2450418c 2884 return m;
5b3a4db3
SW		 2885
2886}
2887
2888static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2889 struct ceph_msg_header *hdr,
2890 int *skip)
2891{
2892 struct ceph_osd *osd = con->private;
2893 int type = le16_to_cpu(hdr->type);
2894 int front = le32_to_cpu(hdr->front_len);
2895
1c20f2d2 2896 *skip = 0;
5b3a4db3
SW		 2897 switch (type) {
2898 case CEPH_MSG_OSD_MAP:
a40c4f10 2899 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2900 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2901 case CEPH_MSG_OSD_OPREPLY:
2902 return get_reply(con, hdr, skip);
2903 default:
2904 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2905 osd->o_osd);
2906 *skip = 1;
2907 return NULL;
2908 }
f24e9980
SW		 2909}
2910
2911/*
2912 * Wrappers to refcount containing ceph_osd struct
2913 */
2914static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2915{
2916 struct ceph_osd *osd = con->private;
2917 if (get_osd(osd))
2918 return con;
2919 return NULL;
2920}
2921
2922static void put_osd_con(struct ceph_connection *con)
2923{
2924 struct ceph_osd *osd = con->private;
2925 put_osd(osd);
2926}
2927
4e7a5dcd
SW		 2928/*
2929 * authentication
2930 */
a3530df3
AE		 2931/*
2932 * Note: returned pointer is the address of a structure that's
2933 * managed separately. Caller must *not* attempt to free it.
2934 */
2935static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2936 int *proto, int force_new)
4e7a5dcd
SW		 2937{
2938 struct ceph_osd *o = con->private;
2939 struct ceph_osd_client *osdc = o->o_osdc;
2940 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2941 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2942
74f1869f 2943 if (force_new && auth->authorizer) {
27859f97 2944 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2945 auth->authorizer = NULL;
2946 }
27859f97
SW		 2947 if (!auth->authorizer) {
2948 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2949 auth);
4e7a5dcd 2950 if (ret)
a3530df3 2951 return ERR_PTR(ret);
27859f97
SW		 2952 } else {
2953 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2954 auth);
2955 if (ret)
2956 return ERR_PTR(ret);
4e7a5dcd 2957 }
4e7a5dcd 2958 *proto = ac->protocol;
74f1869f 2959
a3530df3 2960 return auth;
4e7a5dcd
SW		 2961}
2962
2963
2964static int verify_authorizer_reply(struct ceph_connection *con, int len)
2965{
2966 struct ceph_osd *o = con->private;
2967 struct ceph_osd_client *osdc = o->o_osdc;
2968 struct ceph_auth_client *ac = osdc->client->monc.auth;
2969
27859f97 2970 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2971}
2972
9bd2e6f8
SW		 2973static int invalidate_authorizer(struct ceph_connection *con)
2974{
2975 struct ceph_osd *o = con->private;
2976 struct ceph_osd_client *osdc = o->o_osdc;
2977 struct ceph_auth_client *ac = osdc->client->monc.auth;
2978
27859f97 2979 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2980 return ceph_monc_validate_auth(&osdc->client->monc);
2981}
4e7a5dcd 2982
33d07337
YZ		 2983static int sign_message(struct ceph_connection *con, struct ceph_msg *msg)
2984{
2985 struct ceph_osd *o = con->private;
2986 struct ceph_auth_handshake *auth = &o->o_auth;
2987 return ceph_auth_sign_message(auth, msg);
2988}
2989
2990static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg)
2991{
2992 struct ceph_osd *o = con->private;
2993 struct ceph_auth_handshake *auth = &o->o_auth;
2994 return ceph_auth_check_message_signature(auth, msg);
2995}
2996
9e32789f 2997static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2998 .get = get_osd_con,
2999 .put = put_osd_con,
3000 .dispatch = dispatch,
4e7a5dcd
SW		 3001 .get_authorizer = get_authorizer,
3002 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 3003 .invalidate_authorizer = invalidate_authorizer,
f24e9980 3004 .alloc_msg = alloc_msg,
33d07337
YZ		 3005 .sign_message = sign_message,
3006 .check_message_signature = check_message_signature,
81b024e7 3007 .fault = osd_reset,
f24e9980 3008};
Linux 6.x block layer and io_uring tree(s)