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libceph: unregister only registered linger requests
[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);
33static void __unregister_linger_request(struct ceph_osd_client *osdc,
34 struct ceph_osd_request *req);
56e925b6
SW		 35static void __send_request(struct ceph_osd_client *osdc,
36 struct ceph_osd_request *req);
f24e9980
SW		 37
38/*
39 * Implement client access to distributed object storage cluster.
40 *
41 * All data objects are stored within a cluster/cloud of OSDs, or
42 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
43 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
44 * remote daemons serving up and coordinating consistent and safe
45 * access to storage.
46 *
47 * Cluster membership and the mapping of data objects onto storage devices
48 * are described by the osd map.
49 *
50 * We keep track of pending OSD requests (read, write), resubmit
51 * requests to different OSDs when the cluster topology/data layout
52 * change, or retry the affected requests when the communications
53 * channel with an OSD is reset.
54 */
55
56/*
57 * calculate the mapping of a file extent onto an object, and fill out the
58 * request accordingly. shorten extent as necessary if it crosses an
59 * object boundary.
60 *
61 * fill osd op in request message.
62 */
dbe0fc41 63static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 64 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 65{
60e56f13 66 u64 orig_len = *plen;
d63b77f4 67 int r;
f24e9980 68
60e56f13 69 /* object extent? */
75d1c941
AE		 70 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
71 objoff, objlen);
d63b77f4
SW		 72 if (r < 0)
73 return r;
75d1c941
AE		 74 if (*objlen < orig_len) {
75 *plen = *objlen;
60e56f13
AE		 76 dout(" skipping last %llu, final file extent %llu~%llu\n",
77 orig_len - *plen, off, *plen);
78 }
79
75d1c941 80 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
f24e9980 81
3ff5f385 82 return 0;
f24e9980
SW		 83}
84
c54d47bf
AE		 85static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
86{
87 memset(osd_data, 0, sizeof (*osd_data));
88 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
89}
90
a4ce40a9 91static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 92 struct page **pages, u64 length, u32 alignment,
93 bool pages_from_pool, bool own_pages)
94{
95 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
96 osd_data->pages = pages;
97 osd_data->length = length;
98 osd_data->alignment = alignment;
99 osd_data->pages_from_pool = pages_from_pool;
100 osd_data->own_pages = own_pages;
101}
43bfe5de 102
a4ce40a9 103static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 104 struct ceph_pagelist *pagelist)
105{
106 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
107 osd_data->pagelist = pagelist;
108}
43bfe5de
AE		 109
110#ifdef CONFIG_BLOCK
a4ce40a9 111static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 112 struct bio *bio, size_t bio_length)
113{
114 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
115 osd_data->bio = bio;
116 osd_data->bio_length = bio_length;
117}
43bfe5de
AE		 118#endif /* CONFIG_BLOCK */
119
863c7eb5
AE		 120#define osd_req_op_data(oreq, whch, typ, fld) \
121 ({ \
122 BUG_ON(whch >= (oreq)->r_num_ops); \
123 &(oreq)->r_ops[whch].typ.fld; \
124 })
125
49719778
AE		 126static struct ceph_osd_data *
127osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
128{
129 BUG_ON(which >= osd_req->r_num_ops);
130
131 return &osd_req->r_ops[which].raw_data_in;
132}
133
a4ce40a9
AE		 134struct ceph_osd_data *
135osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 136 unsigned int which)
a4ce40a9 137{
863c7eb5 138 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 139}
140EXPORT_SYMBOL(osd_req_op_extent_osd_data);
141
a4ce40a9
AE		 142struct ceph_osd_data *
143osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
144 unsigned int which)
145{
863c7eb5 146 return osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 147}
148EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
149
49719778
AE		 150void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
151 unsigned int which, struct page **pages,
152 u64 length, u32 alignment,
153 bool pages_from_pool, bool own_pages)
154{
155 struct ceph_osd_data *osd_data;
156
157 osd_data = osd_req_op_raw_data_in(osd_req, which);
158 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
159 pages_from_pool, own_pages);
160}
161EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
162
a4ce40a9 163void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 164 unsigned int which, struct page **pages,
165 u64 length, u32 alignment,
a4ce40a9
AE		 166 bool pages_from_pool, bool own_pages)
167{
168 struct ceph_osd_data *osd_data;
169
863c7eb5 170 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 171 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
172 pages_from_pool, own_pages);
a4ce40a9
AE		 173}
174EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
175
176void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 177 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 178{
179 struct ceph_osd_data *osd_data;
180
863c7eb5 181 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 182 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 183}
184EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
185
186#ifdef CONFIG_BLOCK
187void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 188 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 189{
190 struct ceph_osd_data *osd_data;
863c7eb5
AE		 191
192 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 193 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 194}
195EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
196#endif /* CONFIG_BLOCK */
197
198static void osd_req_op_cls_request_info_pagelist(
199 struct ceph_osd_request *osd_req,
200 unsigned int which, struct ceph_pagelist *pagelist)
201{
202 struct ceph_osd_data *osd_data;
203
863c7eb5 204 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 205 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 206}
207
04017e29
AE		 208void osd_req_op_cls_request_data_pagelist(
209 struct ceph_osd_request *osd_req,
210 unsigned int which, struct ceph_pagelist *pagelist)
211{
212 struct ceph_osd_data *osd_data;
213
863c7eb5 214 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29
AE		 215 ceph_osd_data_pagelist_init(osd_data, pagelist);
216}
217EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
218
6c57b554
AE		 219void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
220 unsigned int which, struct page **pages, u64 length,
221 u32 alignment, bool pages_from_pool, bool own_pages)
222{
223 struct ceph_osd_data *osd_data;
224
225 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
226 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
227 pages_from_pool, own_pages);
228}
229EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
230
a4ce40a9
AE		 231void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
232 unsigned int which, struct page **pages, u64 length,
233 u32 alignment, bool pages_from_pool, bool own_pages)
234{
235 struct ceph_osd_data *osd_data;
236
863c7eb5 237 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 238 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
239 pages_from_pool, own_pages);
a4ce40a9
AE		 240}
241EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
242
23c08a9c
AE		 243static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
244{
245 switch (osd_data->type) {
246 case CEPH_OSD_DATA_TYPE_NONE:
247 return 0;
248 case CEPH_OSD_DATA_TYPE_PAGES:
249 return osd_data->length;
250 case CEPH_OSD_DATA_TYPE_PAGELIST:
251 return (u64)osd_data->pagelist->length;
252#ifdef CONFIG_BLOCK
253 case CEPH_OSD_DATA_TYPE_BIO:
254 return (u64)osd_data->bio_length;
255#endif /* CONFIG_BLOCK */
256 default:
257 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
258 return 0;
259 }
260}
261
c54d47bf
AE		 262static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
263{
5476492f 264 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 265 int num_pages;
266
267 num_pages = calc_pages_for((u64)osd_data->alignment,
268 (u64)osd_data->length);
269 ceph_release_page_vector(osd_data->pages, num_pages);
270 }
5476492f
AE		 271 ceph_osd_data_init(osd_data);
272}
273
274static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
275 unsigned int which)
276{
277 struct ceph_osd_req_op *op;
278
279 BUG_ON(which >= osd_req->r_num_ops);
280 op = &osd_req->r_ops[which];
281
282 switch (op->op) {
283 case CEPH_OSD_OP_READ:
284 case CEPH_OSD_OP_WRITE:
285 ceph_osd_data_release(&op->extent.osd_data);
286 break;
287 case CEPH_OSD_OP_CALL:
288 ceph_osd_data_release(&op->cls.request_info);
04017e29 289 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 290 ceph_osd_data_release(&op->cls.response_data);
291 break;
292 default:
293 break;
294 }
c54d47bf
AE		 295}
296
f24e9980
SW		 297/*
298 * requests
299 */
9e94af20 300static void ceph_osdc_release_request(struct kref *kref)
f24e9980 301{
9e94af20
ID		 302 struct ceph_osd_request *req = container_of(kref,
303 struct ceph_osd_request, r_kref);
5476492f 304 unsigned int which;
415e49a9 305
9e94af20
ID		 306 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
307 req->r_request, req->r_reply);
6562d661
ID		 308 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
309 WARN_ON(!list_empty(&req->r_req_lru_item));
310 WARN_ON(!list_empty(&req->r_osd_item));
311 WARN_ON(!list_empty(&req->r_linger_item));
312 WARN_ON(!list_empty(&req->r_linger_osd_item));
313 WARN_ON(req->r_osd);
9e94af20 314
415e49a9
SW		 315 if (req->r_request)
316 ceph_msg_put(req->r_request);
ace6d3a9 317 if (req->r_reply) {
8921d114 318 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 319 ceph_msg_put(req->r_reply);
ace6d3a9 320 }
0fff87ec 321
5476492f
AE		 322 for (which = 0; which < req->r_num_ops; which++)
323 osd_req_op_data_release(req, which);
0fff87ec 324
415e49a9
SW		 325 ceph_put_snap_context(req->r_snapc);
326 if (req->r_mempool)
327 mempool_free(req, req->r_osdc->req_mempool);
328 else
5522ae0b
AE		 329 kmem_cache_free(ceph_osd_request_cache, req);
330
f24e9980 331}
9e94af20
ID		 332
333void ceph_osdc_get_request(struct ceph_osd_request *req)
334{
335 dout("%s %p (was %d)\n", __func__, req,
336 atomic_read(&req->r_kref.refcount));
337 kref_get(&req->r_kref);
338}
339EXPORT_SYMBOL(ceph_osdc_get_request);
340
341void ceph_osdc_put_request(struct ceph_osd_request *req)
342{
343 dout("%s %p (was %d)\n", __func__, req,
344 atomic_read(&req->r_kref.refcount));
345 kref_put(&req->r_kref, ceph_osdc_release_request);
346}
347EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 348
3499e8a5 349struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 350 struct ceph_snap_context *snapc,
1b83bef2 351 unsigned int num_ops,
3499e8a5 352 bool use_mempool,
54a54007 353 gfp_t gfp_flags)
f24e9980
SW		 354{
355 struct ceph_osd_request *req;
356 struct ceph_msg *msg;
1b83bef2
SW		 357 size_t msg_size;
358
79528734
AE		 359 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
360 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
361
1b83bef2
SW		 362 msg_size = 4 + 4 + 8 + 8 + 4+8;
363 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
364 msg_size += 1 + 8 + 4 + 4; /* pg_t */
2d0ebc5d 365 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
1b83bef2
SW		 366 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
367 msg_size += 8; /* snapid */
368 msg_size += 8; /* snap_seq */
369 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
370 msg_size += 4;
f24e9980
SW		 371
372 if (use_mempool) {
3499e8a5 373 req = mempool_alloc(osdc->req_mempool, gfp_flags);
f24e9980
SW		 374 memset(req, 0, sizeof(*req));
375 } else {
5522ae0b 376 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
f24e9980
SW		 377 }
378 if (req == NULL)
a79832f2 379 return NULL;
f24e9980 380
f24e9980
SW		 381 req->r_osdc = osdc;
382 req->r_mempool = use_mempool;
79528734 383 req->r_num_ops = num_ops;
68b4476b 384
415e49a9 385 kref_init(&req->r_kref);
f24e9980
SW		 386 init_completion(&req->r_completion);
387 init_completion(&req->r_safe_completion);
a978fa20 388 RB_CLEAR_NODE(&req->r_node);
f24e9980 389 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 390 INIT_LIST_HEAD(&req->r_linger_item);
1d0326b1 391 INIT_LIST_HEAD(&req->r_linger_osd_item);
935b639a 392 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 393 INIT_LIST_HEAD(&req->r_osd_item);
394
3c972c95 395 req->r_base_oloc.pool = -1;
205ee118 396 req->r_target_oloc.pool = -1;
22116525 397
c16e7869
SW		 398 /* create reply message */
399 if (use_mempool)
400 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
401 else
402 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
b61c2763 403 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
a79832f2 404 if (!msg) {
c16e7869 405 ceph_osdc_put_request(req);
a79832f2 406 return NULL;
c16e7869
SW		 407 }
408 req->r_reply = msg;
409
410 /* create request message; allow space for oid */
f24e9980 411 if (use_mempool)
8f3bc053 412 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 413 else
b61c2763 414 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
a79832f2 415 if (!msg) {
f24e9980 416 ceph_osdc_put_request(req);
a79832f2 417 return NULL;
f24e9980 418 }
68b4476b 419
f24e9980 420 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5
YS		 421
422 req->r_request = msg;
3499e8a5
YS		 423
424 return req;
425}
3d14c5d2 426EXPORT_SYMBOL(ceph_osdc_alloc_request);
3499e8a5 427
a8dd0a37 428static bool osd_req_opcode_valid(u16 opcode)
68b4476b 429{
a8dd0a37 430 switch (opcode) {
68b4476b 431 case CEPH_OSD_OP_READ:
a8dd0a37 432 case CEPH_OSD_OP_STAT:
4c46459c
AE		 433 case CEPH_OSD_OP_MAPEXT:
434 case CEPH_OSD_OP_MASKTRUNC:
435 case CEPH_OSD_OP_SPARSE_READ:
a9f36c3e 436 case CEPH_OSD_OP_NOTIFY:
a8dd0a37 437 case CEPH_OSD_OP_NOTIFY_ACK:
4c46459c 438 case CEPH_OSD_OP_ASSERT_VER:
a8dd0a37 439 case CEPH_OSD_OP_WRITE:
4c46459c
AE		 440 case CEPH_OSD_OP_WRITEFULL:
441 case CEPH_OSD_OP_TRUNCATE:
442 case CEPH_OSD_OP_ZERO:
443 case CEPH_OSD_OP_DELETE:
444 case CEPH_OSD_OP_APPEND:
a8dd0a37 445 case CEPH_OSD_OP_STARTSYNC:
4c46459c
AE		 446 case CEPH_OSD_OP_SETTRUNC:
447 case CEPH_OSD_OP_TRIMTRUNC:
448 case CEPH_OSD_OP_TMAPUP:
449 case CEPH_OSD_OP_TMAPPUT:
450 case CEPH_OSD_OP_TMAPGET:
451 case CEPH_OSD_OP_CREATE:
a9f36c3e 452 case CEPH_OSD_OP_ROLLBACK:
a8dd0a37 453 case CEPH_OSD_OP_WATCH:
4c46459c
AE		 454 case CEPH_OSD_OP_OMAPGETKEYS:
455 case CEPH_OSD_OP_OMAPGETVALS:
456 case CEPH_OSD_OP_OMAPGETHEADER:
457 case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
4c46459c
AE		 458 case CEPH_OSD_OP_OMAPSETVALS:
459 case CEPH_OSD_OP_OMAPSETHEADER:
460 case CEPH_OSD_OP_OMAPCLEAR:
461 case CEPH_OSD_OP_OMAPRMKEYS:
462 case CEPH_OSD_OP_OMAP_CMP:
c647b8a8 463 case CEPH_OSD_OP_SETALLOCHINT:
4c46459c
AE		 464 case CEPH_OSD_OP_CLONERANGE:
465 case CEPH_OSD_OP_ASSERT_SRC_VERSION:
466 case CEPH_OSD_OP_SRC_CMPXATTR:
a9f36c3e 467 case CEPH_OSD_OP_GETXATTR:
4c46459c 468 case CEPH_OSD_OP_GETXATTRS:
a9f36c3e
AE		 469 case CEPH_OSD_OP_CMPXATTR:
470 case CEPH_OSD_OP_SETXATTR:
4c46459c
AE		 471 case CEPH_OSD_OP_SETXATTRS:
472 case CEPH_OSD_OP_RESETXATTRS:
473 case CEPH_OSD_OP_RMXATTR:
474 case CEPH_OSD_OP_PULL:
475 case CEPH_OSD_OP_PUSH:
476 case CEPH_OSD_OP_BALANCEREADS:
477 case CEPH_OSD_OP_UNBALANCEREADS:
478 case CEPH_OSD_OP_SCRUB:
479 case CEPH_OSD_OP_SCRUB_RESERVE:
480 case CEPH_OSD_OP_SCRUB_UNRESERVE:
481 case CEPH_OSD_OP_SCRUB_STOP:
482 case CEPH_OSD_OP_SCRUB_MAP:
483 case CEPH_OSD_OP_WRLOCK:
484 case CEPH_OSD_OP_WRUNLOCK:
485 case CEPH_OSD_OP_RDLOCK:
486 case CEPH_OSD_OP_RDUNLOCK:
487 case CEPH_OSD_OP_UPLOCK:
488 case CEPH_OSD_OP_DNLOCK:
a8dd0a37 489 case CEPH_OSD_OP_CALL:
4c46459c
AE		 490 case CEPH_OSD_OP_PGLS:
491 case CEPH_OSD_OP_PGLS_FILTER:
a8dd0a37
AE		 492 return true;
493 default:
494 return false;
495 }
496}
497
33803f33
AE		 498/*
499 * This is an osd op init function for opcodes that have no data or
500 * other information associated with them. It also serves as a
501 * common init routine for all the other init functions, below.
502 */
c99d2d4a 503static struct ceph_osd_req_op *
49719778 504_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
c99d2d4a 505 u16 opcode)
33803f33 506{
c99d2d4a
AE		 507 struct ceph_osd_req_op *op;
508
509 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 510 BUG_ON(!osd_req_opcode_valid(opcode));
511
c99d2d4a 512 op = &osd_req->r_ops[which];
33803f33 513 memset(op, 0, sizeof (*op));
33803f33 514 op->op = opcode;
c99d2d4a
AE		 515
516 return op;
33803f33
AE		 517}
518
49719778
AE		 519void osd_req_op_init(struct ceph_osd_request *osd_req,
520 unsigned int which, u16 opcode)
521{
522 (void)_osd_req_op_init(osd_req, which, opcode);
523}
524EXPORT_SYMBOL(osd_req_op_init);
525
c99d2d4a
AE		 526void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
527 unsigned int which, u16 opcode,
33803f33
AE		 528 u64 offset, u64 length,
529 u64 truncate_size, u32 truncate_seq)
530{
49719778 531 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33
AE		 532 size_t payload_len = 0;
533
ad7a60de
LW		 534 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
535 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
536 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 537
33803f33
AE		 538 op->extent.offset = offset;
539 op->extent.length = length;
540 op->extent.truncate_size = truncate_size;
541 op->extent.truncate_seq = truncate_seq;
542 if (opcode == CEPH_OSD_OP_WRITE)
543 payload_len += length;
544
545 op->payload_len = payload_len;
546}
547EXPORT_SYMBOL(osd_req_op_extent_init);
548
c99d2d4a
AE		 549void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
550 unsigned int which, u64 length)
e5975c7c 551{
c99d2d4a
AE		 552 struct ceph_osd_req_op *op;
553 u64 previous;
554
555 BUG_ON(which >= osd_req->r_num_ops);
556 op = &osd_req->r_ops[which];
557 previous = op->extent.length;
e5975c7c
AE		 558
559 if (length == previous)
560 return; /* Nothing to do */
561 BUG_ON(length > previous);
562
563 op->extent.length = length;
564 op->payload_len -= previous - length;
565}
566EXPORT_SYMBOL(osd_req_op_extent_update);
567
c99d2d4a 568void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 569 u16 opcode, const char *class, const char *method)
33803f33 570{
49719778 571 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
5f562df5 572 struct ceph_pagelist *pagelist;
33803f33
AE		 573 size_t payload_len = 0;
574 size_t size;
575
576 BUG_ON(opcode != CEPH_OSD_OP_CALL);
577
5f562df5
AE		 578 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
579 BUG_ON(!pagelist);
580 ceph_pagelist_init(pagelist);
581
33803f33
AE		 582 op->cls.class_name = class;
583 size = strlen(class);
584 BUG_ON(size > (size_t) U8_MAX);
585 op->cls.class_len = size;
5f562df5 586 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 587 payload_len += size;
588
589 op->cls.method_name = method;
590 size = strlen(method);
591 BUG_ON(size > (size_t) U8_MAX);
592 op->cls.method_len = size;
5f562df5 593 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 594 payload_len += size;
595
a4ce40a9 596 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 597
33803f33
AE		 598 op->cls.argc = 0; /* currently unused */
599
600 op->payload_len = payload_len;
601}
602EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 603
c99d2d4a
AE		 604void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
605 unsigned int which, u16 opcode,
33803f33
AE		 606 u64 cookie, u64 version, int flag)
607{
49719778 608 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33 609
c99d2d4a 610 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 611
612 op->watch.cookie = cookie;
9ef1ee5a 613 op->watch.ver = version;
33803f33 614 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 615 op->watch.flag = (u8)1;
33803f33
AE		 616}
617EXPORT_SYMBOL(osd_req_op_watch_init);
618
c647b8a8
ID		 619void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
620 unsigned int which,
621 u64 expected_object_size,
622 u64 expected_write_size)
623{
624 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
625 CEPH_OSD_OP_SETALLOCHINT);
626
627 op->alloc_hint.expected_object_size = expected_object_size;
628 op->alloc_hint.expected_write_size = expected_write_size;
629
630 /*
631 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
632 * not worth a feature bit. Set FAILOK per-op flag to make
633 * sure older osds don't trip over an unsupported opcode.
634 */
635 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
636}
637EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
638
90af3602 639static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 640 struct ceph_osd_data *osd_data)
641{
642 u64 length = ceph_osd_data_length(osd_data);
643
644 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
645 BUG_ON(length > (u64) SIZE_MAX);
646 if (length)
90af3602 647 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 648 length, osd_data->alignment);
649 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
650 BUG_ON(!length);
90af3602 651 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 652#ifdef CONFIG_BLOCK
653 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 654 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 655#endif
656 } else {
657 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
658 }
659}
660
a8dd0a37 661static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 662 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 663{
79528734 664 struct ceph_osd_req_op *src;
04017e29 665 struct ceph_osd_data *osd_data;
54d50649 666 u64 request_data_len = 0;
04017e29 667 u64 data_length;
a8dd0a37 668
79528734
AE		 669 BUG_ON(which >= req->r_num_ops);
670 src = &req->r_ops[which];
a8dd0a37
AE		 671 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
672 pr_err("unrecognized osd opcode %d\n", src->op);
673
674 return 0;
675 }
676
677 switch (src->op) {
678 case CEPH_OSD_OP_STAT:
49719778
AE		 679 osd_data = &src->raw_data_in;
680 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 681 break;
682 case CEPH_OSD_OP_READ:
683 case CEPH_OSD_OP_WRITE:
ad7a60de
LW		 684 case CEPH_OSD_OP_ZERO:
685 case CEPH_OSD_OP_DELETE:
686 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37 687 if (src->op == CEPH_OSD_OP_WRITE)
54d50649 688 request_data_len = src->extent.length;
a8dd0a37
AE		 689 dst->extent.offset = cpu_to_le64(src->extent.offset);
690 dst->extent.length = cpu_to_le64(src->extent.length);
691 dst->extent.truncate_size =
692 cpu_to_le64(src->extent.truncate_size);
693 dst->extent.truncate_seq =
694 cpu_to_le32(src->extent.truncate_seq);
04017e29 695 osd_data = &src->extent.osd_data;
5476492f 696 if (src->op == CEPH_OSD_OP_WRITE)
04017e29 697 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 698 else
04017e29 699 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 700 break;
701 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 702 dst->cls.class_len = src->cls.class_len;
703 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 704 osd_data = &src->cls.request_info;
705 ceph_osdc_msg_data_add(req->r_request, osd_data);
706 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
707 request_data_len = osd_data->pagelist->length;
708
709 osd_data = &src->cls.request_data;
710 data_length = ceph_osd_data_length(osd_data);
711 if (data_length) {
712 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
713 dst->cls.indata_len = cpu_to_le32(data_length);
714 ceph_osdc_msg_data_add(req->r_request, osd_data);
715 src->payload_len += data_length;
716 request_data_len += data_length;
717 }
718 osd_data = &src->cls.response_data;
719 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 720 break;
721 case CEPH_OSD_OP_STARTSYNC:
722 break;
723 case CEPH_OSD_OP_NOTIFY_ACK:
724 case CEPH_OSD_OP_WATCH:
725 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
726 dst->watch.ver = cpu_to_le64(src->watch.ver);
727 dst->watch.flag = src->watch.flag;
728 break;
c647b8a8
ID		 729 case CEPH_OSD_OP_SETALLOCHINT:
730 dst->alloc_hint.expected_object_size =
731 cpu_to_le64(src->alloc_hint.expected_object_size);
732 dst->alloc_hint.expected_write_size =
733 cpu_to_le64(src->alloc_hint.expected_write_size);
734 break;
a8dd0a37 735 default:
4c46459c 736 pr_err("unsupported osd opcode %s\n",
8f63ca2d 737 ceph_osd_op_name(src->op));
4c46459c 738 WARN_ON(1);
a8dd0a37
AE		 739
740 return 0;
68b4476b 741 }
7b25bf5f 742
a8dd0a37 743 dst->op = cpu_to_le16(src->op);
7b25bf5f 744 dst->flags = cpu_to_le32(src->flags);
68b4476b 745 dst->payload_len = cpu_to_le32(src->payload_len);
175face2 746
54d50649 747 return request_data_len;
68b4476b
YS		 748}
749
3499e8a5
YS		 750/*
751 * build new request AND message, calculate layout, and adjust file
752 * extent as needed.
753 *
754 * if the file was recently truncated, we include information about its
755 * old and new size so that the object can be updated appropriately. (we
756 * avoid synchronously deleting truncated objects because it's slow.)
757 *
758 * if @do_sync, include a 'startsync' command so that the osd will flush
759 * data quickly.
760 */
761struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
762 struct ceph_file_layout *layout,
763 struct ceph_vino vino,
acead002 764 u64 off, u64 *plen, int num_ops,
3499e8a5
YS		 765 int opcode, int flags,
766 struct ceph_snap_context *snapc,
3499e8a5
YS		 767 u32 truncate_seq,
768 u64 truncate_size,
153e5167 769 bool use_mempool)
3499e8a5 770{
68b4476b 771 struct ceph_osd_request *req;
75d1c941
AE		 772 u64 objnum = 0;
773 u64 objoff = 0;
774 u64 objlen = 0;
d18d1e28
AE		 775 u32 object_size;
776 u64 object_base;
6816282d 777 int r;
68b4476b 778
ad7a60de
LW		 779 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
780 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
781 opcode != CEPH_OSD_OP_TRUNCATE);
68b4476b 782
acead002 783 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 784 GFP_NOFS);
4ad12621 785 if (!req)
6816282d 786 return ERR_PTR(-ENOMEM);
79528734 787
d178a9e7 788 req->r_flags = flags;
3499e8a5
YS		 789
790 /* calculate max write size */
a19dadfb 791 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 792 if (r < 0) {
793 ceph_osdc_put_request(req);
6816282d 794 return ERR_PTR(r);
3ff5f385 795 }
a19dadfb 796
d18d1e28
AE		 797 object_size = le32_to_cpu(layout->fl_object_size);
798 object_base = off - objoff;
ccca4e37
YZ		 799 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
800 if (truncate_size <= object_base) {
801 truncate_size = 0;
802 } else {
803 truncate_size -= object_base;
804 if (truncate_size > object_size)
805 truncate_size = object_size;
806 }
a19dadfb 807 }
d18d1e28 808
c99d2d4a 809 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
b0270324 810 truncate_size, truncate_seq);
8c042b0d 811
acead002
AE		 812 /*
813 * A second op in the ops array means the caller wants to
814 * also issue a include a 'startsync' command so that the
815 * osd will flush data quickly.
816 */
817 if (num_ops > 1)
c99d2d4a 818 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
d18d1e28 819
3c972c95 820 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
3499e8a5 821
3c972c95 822 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
4295f221 823 "%llx.%08llx", vino.ino, objnum);
3c972c95 824 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
dbe0fc41 825
f24e9980
SW		 826 return req;
827}
3d14c5d2 828EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 829
830/*
831 * We keep osd requests in an rbtree, sorted by ->r_tid.
832 */
833static void __insert_request(struct ceph_osd_client *osdc,
834 struct ceph_osd_request *new)
835{
836 struct rb_node **p = &osdc->requests.rb_node;
837 struct rb_node *parent = NULL;
838 struct ceph_osd_request *req = NULL;
839
840 while (*p) {
841 parent = *p;
842 req = rb_entry(parent, struct ceph_osd_request, r_node);
843 if (new->r_tid < req->r_tid)
844 p = &(*p)->rb_left;
845 else if (new->r_tid > req->r_tid)
846 p = &(*p)->rb_right;
847 else
848 BUG();
849 }
850
851 rb_link_node(&new->r_node, parent, p);
852 rb_insert_color(&new->r_node, &osdc->requests);
853}
854
855static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
856 u64 tid)
857{
858 struct ceph_osd_request *req;
859 struct rb_node *n = osdc->requests.rb_node;
860
861 while (n) {
862 req = rb_entry(n, struct ceph_osd_request, r_node);
863 if (tid < req->r_tid)
864 n = n->rb_left;
865 else if (tid > req->r_tid)
866 n = n->rb_right;
867 else
868 return req;
869 }
870 return NULL;
871}
872
873static struct ceph_osd_request *
874__lookup_request_ge(struct ceph_osd_client *osdc,
875 u64 tid)
876{
877 struct ceph_osd_request *req;
878 struct rb_node *n = osdc->requests.rb_node;
879
880 while (n) {
881 req = rb_entry(n, struct ceph_osd_request, r_node);
882 if (tid < req->r_tid) {
883 if (!n->rb_left)
884 return req;
885 n = n->rb_left;
886 } else if (tid > req->r_tid) {
887 n = n->rb_right;
888 } else {
889 return req;
890 }
891 }
892 return NULL;
893}
894
6f6c7006
SW		 895/*
896 * Resubmit requests pending on the given osd.
897 */
898static void __kick_osd_requests(struct ceph_osd_client *osdc,
899 struct ceph_osd *osd)
900{
a40c4f10 901 struct ceph_osd_request *req, *nreq;
e02493c0 902 LIST_HEAD(resend);
6f6c7006
SW		 903 int err;
904
905 dout("__kick_osd_requests osd%d\n", osd->o_osd);
906 err = __reset_osd(osdc, osd);
685a7555 907 if (err)
6f6c7006 908 return;
e02493c0
AE		 909 /*
910 * Build up a list of requests to resend by traversing the
911 * osd's list of requests. Requests for a given object are
912 * sent in tid order, and that is also the order they're
913 * kept on this list. Therefore all requests that are in
914 * flight will be found first, followed by all requests that
915 * have not yet been sent. And to resend requests while
916 * preserving this order we will want to put any sent
917 * requests back on the front of the osd client's unsent
918 * list.
919 *
920 * So we build a separate ordered list of already-sent
921 * requests for the affected osd and splice it onto the
922 * front of the osd client's unsent list. Once we've seen a
923 * request that has not yet been sent we're done. Those
924 * requests are already sitting right where they belong.
925 */
6f6c7006 926 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 927 if (!req->r_sent)
928 break;
929 list_move_tail(&req->r_req_lru_item, &resend);
930 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
6f6c7006 931 osd->o_osd);
a40c4f10
YS		 932 if (!req->r_linger)
933 req->r_flags |= CEPH_OSD_FLAG_RETRY;
934 }
e02493c0 935 list_splice(&resend, &osdc->req_unsent);
a40c4f10 936
e02493c0
AE		 937 /*
938 * Linger requests are re-registered before sending, which
939 * sets up a new tid for each. We add them to the unsent
940 * list at the end to keep things in tid order.
941 */
a40c4f10 942 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1d0326b1 943 r_linger_osd_item) {
77f38e0e
SW		 944 /*
945 * reregister request prior to unregistering linger so
946 * that r_osd is preserved.
947 */
948 BUG_ON(!list_empty(&req->r_req_lru_item));
a40c4f10 949 __register_request(osdc, req);
e02493c0 950 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
ad885927 951 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
77f38e0e 952 __unregister_linger_request(osdc, req);
a40c4f10
YS		 953 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
954 osd->o_osd);
6f6c7006
SW		 955 }
956}
957
f24e9980 958/*
81b024e7 959 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 960 */
961static void osd_reset(struct ceph_connection *con)
962{
963 struct ceph_osd *osd = con->private;
964 struct ceph_osd_client *osdc;
965
966 if (!osd)
967 return;
968 dout("osd_reset osd%d\n", osd->o_osd);
969 osdc = osd->o_osdc;
f24e9980 970 down_read(&osdc->map_sem);
83aff95e
SW		 971 mutex_lock(&osdc->request_mutex);
972 __kick_osd_requests(osdc, osd);
f9d25199 973 __send_queued(osdc);
83aff95e 974 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 975 up_read(&osdc->map_sem);
976}
977
978/*
979 * Track open sessions with osds.
980 */
e10006f8 981static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 982{
983 struct ceph_osd *osd;
984
985 osd = kzalloc(sizeof(*osd), GFP_NOFS);
986 if (!osd)
987 return NULL;
988
989 atomic_set(&osd->o_ref, 1);
990 osd->o_osdc = osdc;
e10006f8 991 osd->o_osd = onum;
f407731d 992 RB_CLEAR_NODE(&osd->o_node);
f24e9980 993 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 994 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 995 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 996 osd->o_incarnation = 1;
997
b7a9e5dd 998 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 999
422d2cb8 1000 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 1001 return osd;
1002}
1003
1004static struct ceph_osd *get_osd(struct ceph_osd *osd)
1005{
1006 if (atomic_inc_not_zero(&osd->o_ref)) {
1007 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1008 atomic_read(&osd->o_ref));
1009 return osd;
1010 } else {
1011 dout("get_osd %p FAIL\n", osd);
1012 return NULL;
1013 }
1014}
1015
1016static void put_osd(struct ceph_osd *osd)
1017{
1018 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1019 atomic_read(&osd->o_ref) - 1);
a255651d 1020 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
79494d1b
SW		 1021 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
1022
27859f97 1023 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 1024 kfree(osd);
79494d1b 1025 }
f24e9980
SW		 1026}
1027
1028/*
1029 * remove an osd from our map
1030 */
f5a2041b 1031static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1032{
f5a2041b 1033 dout("__remove_osd %p\n", osd);
f24e9980 1034 BUG_ON(!list_empty(&osd->o_requests));
7c6e6fc5
ID		 1035 BUG_ON(!list_empty(&osd->o_linger_requests));
1036
f24e9980 1037 rb_erase(&osd->o_node, &osdc->osds);
f5a2041b 1038 list_del_init(&osd->o_osd_lru);
f24e9980
SW		 1039 ceph_con_close(&osd->o_con);
1040 put_osd(osd);
1041}
1042
aca420bc
SW		 1043static void remove_all_osds(struct ceph_osd_client *osdc)
1044{
048a9d2d 1045 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 1046 mutex_lock(&osdc->request_mutex);
1047 while (!RB_EMPTY_ROOT(&osdc->osds)) {
1048 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
1049 struct ceph_osd, o_node);
1050 __remove_osd(osdc, osd);
1051 }
1052 mutex_unlock(&osdc->request_mutex);
1053}
1054
f5a2041b
YS		 1055static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1056 struct ceph_osd *osd)
1057{
bbf37ec3 1058 dout("%s %p\n", __func__, osd);
f5a2041b 1059 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1060
f5a2041b 1061 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
3d14c5d2 1062 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
f5a2041b
YS		 1063}
1064
bbf37ec3
ID		 1065static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1066 struct ceph_osd *osd)
1067{
1068 dout("%s %p\n", __func__, osd);
1069
1070 if (list_empty(&osd->o_requests) &&
1071 list_empty(&osd->o_linger_requests))
1072 __move_osd_to_lru(osdc, osd);
1073}
1074
f5a2041b
YS		 1075static void __remove_osd_from_lru(struct ceph_osd *osd)
1076{
1077 dout("__remove_osd_from_lru %p\n", osd);
1078 if (!list_empty(&osd->o_osd_lru))
1079 list_del_init(&osd->o_osd_lru);
1080}
1081
aca420bc 1082static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1083{
1084 struct ceph_osd *osd, *nosd;
1085
1086 dout("__remove_old_osds %p\n", osdc);
1087 mutex_lock(&osdc->request_mutex);
1088 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1089 if (time_before(jiffies, osd->lru_ttl))
f5a2041b
YS		 1090 break;
1091 __remove_osd(osdc, osd);
1092 }
1093 mutex_unlock(&osdc->request_mutex);
1094}
1095
f24e9980
SW		 1096/*
1097 * reset osd connect
1098 */
f5a2041b 1099static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1100{
c3acb181 1101 struct ceph_entity_addr *peer_addr;
f24e9980 1102
f5a2041b 1103 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1104 if (list_empty(&osd->o_requests) &&
1105 list_empty(&osd->o_linger_requests)) {
f5a2041b 1106 __remove_osd(osdc, osd);
c3acb181
AE		 1107
1108 return -ENODEV;
1109 }
1110
1111 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1112 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1113 !ceph_con_opened(&osd->o_con)) {
1114 struct ceph_osd_request *req;
1115
0b4af2e8
ID		 1116 dout("osd addr hasn't changed and connection never opened, "
1117 "letting msgr retry\n");
87b315a5
SW		 1118 /* touch each r_stamp for handle_timeout()'s benfit */
1119 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1120 req->r_stamp = jiffies;
c3acb181
AE		 1121
1122 return -EAGAIN;
f24e9980 1123 }
c3acb181
AE		 1124
1125 ceph_con_close(&osd->o_con);
1126 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1127 osd->o_incarnation++;
1128
1129 return 0;
f24e9980
SW		 1130}
1131
1132static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1133{
1134 struct rb_node **p = &osdc->osds.rb_node;
1135 struct rb_node *parent = NULL;
1136 struct ceph_osd *osd = NULL;
1137
aca420bc 1138 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1139 while (*p) {
1140 parent = *p;
1141 osd = rb_entry(parent, struct ceph_osd, o_node);
1142 if (new->o_osd < osd->o_osd)
1143 p = &(*p)->rb_left;
1144 else if (new->o_osd > osd->o_osd)
1145 p = &(*p)->rb_right;
1146 else
1147 BUG();
1148 }
1149
1150 rb_link_node(&new->o_node, parent, p);
1151 rb_insert_color(&new->o_node, &osdc->osds);
1152}
1153
1154static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1155{
1156 struct ceph_osd *osd;
1157 struct rb_node *n = osdc->osds.rb_node;
1158
1159 while (n) {
1160 osd = rb_entry(n, struct ceph_osd, o_node);
1161 if (o < osd->o_osd)
1162 n = n->rb_left;
1163 else if (o > osd->o_osd)
1164 n = n->rb_right;
1165 else
1166 return osd;
1167 }
1168 return NULL;
1169}
1170
422d2cb8
YS		 1171static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1172{
1173 schedule_delayed_work(&osdc->timeout_work,
3d14c5d2 1174 osdc->client->options->osd_keepalive_timeout * HZ);
422d2cb8
YS		 1175}
1176
1177static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1178{
1179 cancel_delayed_work(&osdc->timeout_work);
1180}
f24e9980
SW		 1181
1182/*
1183 * Register request, assign tid. If this is the first request, set up
1184 * the timeout event.
1185 */
a40c4f10
YS		 1186static void __register_request(struct ceph_osd_client *osdc,
1187 struct ceph_osd_request *req)
f24e9980 1188{
f24e9980 1189 req->r_tid = ++osdc->last_tid;
6df058c0 1190 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1191 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1192 __insert_request(osdc, req);
1193 ceph_osdc_get_request(req);
1194 osdc->num_requests++;
f24e9980 1195 if (osdc->num_requests == 1) {
422d2cb8
YS		 1196 dout(" first request, scheduling timeout\n");
1197 __schedule_osd_timeout(osdc);
f24e9980 1198 }
a40c4f10
YS		 1199}
1200
f24e9980
SW		 1201/*
1202 * called under osdc->request_mutex
1203 */
1204static void __unregister_request(struct ceph_osd_client *osdc,
1205 struct ceph_osd_request *req)
1206{
35f9f8a0
SW		 1207 if (RB_EMPTY_NODE(&req->r_node)) {
1208 dout("__unregister_request %p tid %lld not registered\n",
1209 req, req->r_tid);
1210 return;
1211 }
1212
f24e9980
SW		 1213 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1214 rb_erase(&req->r_node, &osdc->requests);
6562d661 1215 RB_CLEAR_NODE(&req->r_node);
f24e9980
SW		 1216 osdc->num_requests--;
1217
0ba6478d
SW		 1218 if (req->r_osd) {
1219 /* make sure the original request isn't in flight. */
6740a845 1220 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1221
1222 list_del_init(&req->r_osd_item);
bbf37ec3 1223 maybe_move_osd_to_lru(osdc, req->r_osd);
fbdb9190 1224 if (list_empty(&req->r_linger_item))
a40c4f10 1225 req->r_osd = NULL;
0ba6478d 1226 }
f24e9980 1227
7d5f2481 1228 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1229 ceph_osdc_put_request(req);
1230
422d2cb8
YS		 1231 if (osdc->num_requests == 0) {
1232 dout(" no requests, canceling timeout\n");
1233 __cancel_osd_timeout(osdc);
f24e9980
SW		 1234 }
1235}
1236
1237/*
1238 * Cancel a previously queued request message
1239 */
1240static void __cancel_request(struct ceph_osd_request *req)
1241{
6bc18876 1242 if (req->r_sent && req->r_osd) {
6740a845 1243 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1244 req->r_sent = 0;
1245 }
1246}
1247
a40c4f10
YS		 1248static void __register_linger_request(struct ceph_osd_client *osdc,
1249 struct ceph_osd_request *req)
1250{
af593064
ID		 1251 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1252 WARN_ON(!req->r_linger);
1253
96e4dac6 1254 ceph_osdc_get_request(req);
a40c4f10 1255 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89 1256 if (req->r_osd)
1d0326b1 1257 list_add_tail(&req->r_linger_osd_item,
6194ea89 1258 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1259}
1260
1261static void __unregister_linger_request(struct ceph_osd_client *osdc,
1262 struct ceph_osd_request *req)
1263{
af593064
ID		 1264 WARN_ON(!req->r_linger);
1265
1266 if (list_empty(&req->r_linger_item)) {
1267 dout("%s %p tid %llu not registered\n", __func__, req,
1268 req->r_tid);
1269 return;
1270 }
1271
1272 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
61c74035 1273 list_del_init(&req->r_linger_item);
af593064 1274
a40c4f10 1275 if (req->r_osd) {
1d0326b1 1276 list_del_init(&req->r_linger_osd_item);
bbf37ec3 1277 maybe_move_osd_to_lru(osdc, req->r_osd);
fbdb9190
SW		 1278 if (list_empty(&req->r_osd_item))
1279 req->r_osd = NULL;
a40c4f10 1280 }
96e4dac6 1281 ceph_osdc_put_request(req);
a40c4f10
YS		 1282}
1283
1284void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1285 struct ceph_osd_request *req)
1286{
1287 mutex_lock(&osdc->request_mutex);
af593064 1288 if (req->r_linger)
96e4dac6 1289 __unregister_linger_request(osdc, req);
a40c4f10
YS		 1290 mutex_unlock(&osdc->request_mutex);
1291}
1292EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1293
1294void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1295 struct ceph_osd_request *req)
1296{
1297 if (!req->r_linger) {
1298 dout("set_request_linger %p\n", req);
1299 req->r_linger = 1;
a40c4f10
YS		 1300 }
1301}
1302EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1303
d29adb34
JD		 1304/*
1305 * Returns whether a request should be blocked from being sent
1306 * based on the current osdmap and osd_client settings.
1307 *
1308 * Caller should hold map_sem for read.
1309 */
1310static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1311 struct ceph_osd_request *req)
1312{
1313 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1314 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1315 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1316 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1317 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1318}
1319
17a13e40
ID		 1320/*
1321 * Calculate mapping of a request to a PG. Takes tiering into account.
1322 */
1323static int __calc_request_pg(struct ceph_osdmap *osdmap,
1324 struct ceph_osd_request *req,
1325 struct ceph_pg *pg_out)
1326{
205ee118
ID		 1327 bool need_check_tiering;
1328
1329 need_check_tiering = false;
1330 if (req->r_target_oloc.pool == -1) {
1331 req->r_target_oloc = req->r_base_oloc; /* struct */
1332 need_check_tiering = true;
1333 }
1334 if (req->r_target_oid.name_len == 0) {
1335 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1336 need_check_tiering = true;
1337 }
1338
1339 if (need_check_tiering &&
1340 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
17a13e40
ID		 1341 struct ceph_pg_pool_info *pi;
1342
205ee118 1343 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
17a13e40
ID		 1344 if (pi) {
1345 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1346 pi->read_tier >= 0)
205ee118 1347 req->r_target_oloc.pool = pi->read_tier;
17a13e40
ID		 1348 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1349 pi->write_tier >= 0)
205ee118 1350 req->r_target_oloc.pool = pi->write_tier;
17a13e40
ID		 1351 }
1352 /* !pi is caught in ceph_oloc_oid_to_pg() */
1353 }
1354
205ee118
ID		 1355 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1356 &req->r_target_oid, pg_out);
17a13e40
ID		 1357}
1358
f24e9980
SW		 1359/*
1360 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1361 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1362 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1363 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1364 *
1365 * Return 0 if unchanged, 1 if changed, or negative on error.
1366 *
1367 * Caller should hold map_sem for read and request_mutex.
1368 */
6f6c7006 1369static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1370 struct ceph_osd_request *req, int force_resend)
f24e9980 1371{
5b191d99 1372 struct ceph_pg pgid;
d85b7056 1373 int acting[CEPH_PG_MAX_SIZE];
8008ab10 1374 int num, o;
f24e9980 1375 int err;
d29adb34 1376 bool was_paused;
f24e9980 1377
6f6c7006 1378 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40
ID		 1379
1380 err = __calc_request_pg(osdc->osdmap, req, &pgid);
6f6c7006
SW		 1381 if (err) {
1382 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1383 return err;
6f6c7006 1384 }
7740a42f
SW		 1385 req->r_pgid = pgid;
1386
8008ab10
ID		 1387 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o);
1388 if (num < 0)
1389 num = 0;
f24e9980 1390
d29adb34
JD		 1391 was_paused = req->r_paused;
1392 req->r_paused = __req_should_be_paused(osdc, req);
1393 if (was_paused && !req->r_paused)
1394 force_resend = 1;
1395
38d6453c
SW		 1396 if ((!force_resend &&
1397 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1398 req->r_sent >= req->r_osd->o_incarnation &&
1399 req->r_num_pg_osds == num &&
1400 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
d29adb34
JD		 1401 (req->r_osd == NULL && o == -1) ||
1402 req->r_paused)
f24e9980
SW		 1403 return 0; /* no change */
1404
5b191d99
SW		 1405 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1406 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1407 req->r_osd ? req->r_osd->o_osd : -1);
1408
d85b7056
SW		 1409 /* record full pg acting set */
1410 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1411 req->r_num_pg_osds = num;
1412
f24e9980
SW		 1413 if (req->r_osd) {
1414 __cancel_request(req);
1415 list_del_init(&req->r_osd_item);
f24e9980
SW		 1416 req->r_osd = NULL;
1417 }
1418
1419 req->r_osd = __lookup_osd(osdc, o);
1420 if (!req->r_osd && o >= 0) {
c99eb1c7 1421 err = -ENOMEM;
e10006f8 1422 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1423 if (!req->r_osd) {
1424 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1425 goto out;
6f6c7006 1426 }
f24e9980 1427
6f6c7006 1428 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1429 __insert_osd(osdc, req->r_osd);
1430
b7a9e5dd
SW		 1431 ceph_con_open(&req->r_osd->o_con,
1432 CEPH_ENTITY_TYPE_OSD, o,
1433 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1434 }
1435
f5a2041b
YS		 1436 if (req->r_osd) {
1437 __remove_osd_from_lru(req->r_osd);
ad885927
AE		 1438 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1439 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
6f6c7006 1440 } else {
ad885927 1441 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
f5a2041b 1442 }
d85b7056 1443 err = 1; /* osd or pg changed */
f24e9980
SW		 1444
1445out:
f24e9980
SW		 1446 return err;
1447}
1448
1449/*
1450 * caller should hold map_sem (for read) and request_mutex
1451 */
56e925b6
SW		 1452static void __send_request(struct ceph_osd_client *osdc,
1453 struct ceph_osd_request *req)
f24e9980 1454{
1b83bef2 1455 void *p;
f24e9980 1456
1b83bef2
SW		 1457 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1458 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1459 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1460
1461 /* fill in message content that changes each time we send it */
1462 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1463 put_unaligned_le32(req->r_flags, req->r_request_flags);
205ee118 1464 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1b83bef2
SW		 1465 p = req->r_request_pgid;
1466 ceph_encode_64(&p, req->r_pgid.pool);
1467 ceph_encode_32(&p, req->r_pgid.seed);
1468 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1469 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1470 sizeof(req->r_reassert_version));
2169aea6 1471
3dd72fc0 1472 req->r_stamp = jiffies;
07a27e22 1473 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1474
1475 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1476
f24e9980 1477 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1478
1479 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1480}
1481
6f6c7006
SW		 1482/*
1483 * Send any requests in the queue (req_unsent).
1484 */
f9d25199 1485static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1486{
1487 struct ceph_osd_request *req, *tmp;
1488
f9d25199
AE		 1489 dout("__send_queued\n");
1490 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1491 __send_request(osdc, req);
6f6c7006
SW		 1492}
1493
0bbfdfe8
ID		 1494/*
1495 * Caller should hold map_sem for read and request_mutex.
1496 */
1497static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1498 struct ceph_osd_request *req,
1499 bool nofail)
1500{
1501 int rc;
1502
1503 __register_request(osdc, req);
1504 req->r_sent = 0;
1505 req->r_got_reply = 0;
1506 rc = __map_request(osdc, req, 0);
1507 if (rc < 0) {
1508 if (nofail) {
1509 dout("osdc_start_request failed map, "
1510 " will retry %lld\n", req->r_tid);
1511 rc = 0;
1512 } else {
1513 __unregister_request(osdc, req);
1514 }
1515 return rc;
1516 }
1517
1518 if (req->r_osd == NULL) {
1519 dout("send_request %p no up osds in pg\n", req);
1520 ceph_monc_request_next_osdmap(&osdc->client->monc);
1521 } else {
1522 __send_queued(osdc);
1523 }
1524
1525 return 0;
1526}
1527
f24e9980
SW		 1528/*
1529 * Timeout callback, called every N seconds when 1 or more osd
1530 * requests has been active for more than N seconds. When this
1531 * happens, we ping all OSDs with requests who have timed out to
1532 * ensure any communications channel reset is detected. Reset the
1533 * request timeouts another N seconds in the future as we go.
1534 * Reschedule the timeout event another N seconds in future (unless
1535 * there are no open requests).
1536 */
1537static void handle_timeout(struct work_struct *work)
1538{
1539 struct ceph_osd_client *osdc =
1540 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1541 struct ceph_osd_request *req;
f24e9980 1542 struct ceph_osd *osd;
422d2cb8 1543 unsigned long keepalive =
3d14c5d2 1544 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1545 struct list_head slow_osds;
f24e9980
SW		 1546 dout("timeout\n");
1547 down_read(&osdc->map_sem);
1548
1549 ceph_monc_request_next_osdmap(&osdc->client->monc);
1550
1551 mutex_lock(&osdc->request_mutex);
f24e9980 1552
422d2cb8
YS		 1553 /*
1554 * ping osds that are a bit slow. this ensures that if there
1555 * is a break in the TCP connection we will notice, and reopen
1556 * a connection with that osd (from the fault callback).
1557 */
1558 INIT_LIST_HEAD(&slow_osds);
1559 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1560 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1561 break;
1562
1563 osd = req->r_osd;
1564 BUG_ON(!osd);
1565 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1566 req->r_tid, osd->o_osd);
422d2cb8
YS		 1567 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1568 }
1569 while (!list_empty(&slow_osds)) {
1570 osd = list_entry(slow_osds.next, struct ceph_osd,
1571 o_keepalive_item);
1572 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1573 ceph_con_keepalive(&osd->o_con);
1574 }
1575
422d2cb8 1576 __schedule_osd_timeout(osdc);
f9d25199 1577 __send_queued(osdc);
f24e9980 1578 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1579 up_read(&osdc->map_sem);
1580}
1581
f5a2041b
YS		 1582static void handle_osds_timeout(struct work_struct *work)
1583{
1584 struct ceph_osd_client *osdc =
1585 container_of(work, struct ceph_osd_client,
1586 osds_timeout_work.work);
1587 unsigned long delay =
3d14c5d2 1588 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1589
1590 dout("osds timeout\n");
1591 down_read(&osdc->map_sem);
aca420bc 1592 remove_old_osds(osdc);
f5a2041b
YS		 1593 up_read(&osdc->map_sem);
1594
1595 schedule_delayed_work(&osdc->osds_timeout_work,
1596 round_jiffies_relative(delay));
1597}
1598
205ee118
ID		 1599static int ceph_oloc_decode(void **p, void *end,
1600 struct ceph_object_locator *oloc)
1601{
1602 u8 struct_v, struct_cv;
1603 u32 len;
1604 void *struct_end;
1605 int ret = 0;
1606
1607 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1608 struct_v = ceph_decode_8(p);
1609 struct_cv = ceph_decode_8(p);
1610 if (struct_v < 3) {
1611 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1612 struct_v, struct_cv);
1613 goto e_inval;
1614 }
1615 if (struct_cv > 6) {
1616 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1617 struct_v, struct_cv);
1618 goto e_inval;
1619 }
1620 len = ceph_decode_32(p);
1621 ceph_decode_need(p, end, len, e_inval);
1622 struct_end = *p + len;
1623
1624 oloc->pool = ceph_decode_64(p);
1625 *p += 4; /* skip preferred */
1626
1627 len = ceph_decode_32(p);
1628 if (len > 0) {
1629 pr_warn("ceph_object_locator::key is set\n");
1630 goto e_inval;
1631 }
1632
1633 if (struct_v >= 5) {
1634 len = ceph_decode_32(p);
1635 if (len > 0) {
1636 pr_warn("ceph_object_locator::nspace is set\n");
1637 goto e_inval;
1638 }
1639 }
1640
1641 if (struct_v >= 6) {
1642 s64 hash = ceph_decode_64(p);
1643 if (hash != -1) {
1644 pr_warn("ceph_object_locator::hash is set\n");
1645 goto e_inval;
1646 }
1647 }
1648
1649 /* skip the rest */
1650 *p = struct_end;
1651out:
1652 return ret;
1653
1654e_inval:
1655 ret = -EINVAL;
1656 goto out;
1657}
1658
1659static int ceph_redirect_decode(void **p, void *end,
1660 struct ceph_request_redirect *redir)
1661{
1662 u8 struct_v, struct_cv;
1663 u32 len;
1664 void *struct_end;
1665 int ret;
1666
1667 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1668 struct_v = ceph_decode_8(p);
1669 struct_cv = ceph_decode_8(p);
1670 if (struct_cv > 1) {
1671 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1672 struct_v, struct_cv);
1673 goto e_inval;
1674 }
1675 len = ceph_decode_32(p);
1676 ceph_decode_need(p, end, len, e_inval);
1677 struct_end = *p + len;
1678
1679 ret = ceph_oloc_decode(p, end, &redir->oloc);
1680 if (ret)
1681 goto out;
1682
1683 len = ceph_decode_32(p);
1684 if (len > 0) {
1685 pr_warn("ceph_request_redirect::object_name is set\n");
1686 goto e_inval;
1687 }
1688
1689 len = ceph_decode_32(p);
1690 *p += len; /* skip osd_instructions */
1691
1692 /* skip the rest */
1693 *p = struct_end;
1694out:
1695 return ret;
1696
1697e_inval:
1698 ret = -EINVAL;
1699 goto out;
1700}
1701
25845472
SW		 1702static void complete_request(struct ceph_osd_request *req)
1703{
25845472
SW		 1704 complete_all(&req->r_safe_completion); /* fsync waiter */
1705}
1706
f24e9980
SW		 1707/*
1708 * handle osd op reply. either call the callback if it is specified,
1709 * or do the completion to wake up the waiting thread.
1710 */
350b1c32
SW		 1711static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1712 struct ceph_connection *con)
f24e9980 1713{
1b83bef2 1714 void *p, *end;
f24e9980 1715 struct ceph_osd_request *req;
205ee118 1716 struct ceph_request_redirect redir;
f24e9980 1717 u64 tid;
1b83bef2 1718 int object_len;
79528734
AE		 1719 unsigned int numops;
1720 int payload_len, flags;
0ceed5db 1721 s32 result;
1b83bef2
SW		 1722 s32 retry_attempt;
1723 struct ceph_pg pg;
1724 int err;
1725 u32 reassert_epoch;
1726 u64 reassert_version;
1727 u32 osdmap_epoch;
0d5af164 1728 int already_completed;
9fc6e064 1729 u32 bytes;
79528734 1730 unsigned int i;
f24e9980 1731
6df058c0 1732 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1733 dout("handle_reply %p tid %llu\n", msg, tid);
1734
1735 p = msg->front.iov_base;
1736 end = p + msg->front.iov_len;
1737
1738 ceph_decode_need(&p, end, 4, bad);
1739 object_len = ceph_decode_32(&p);
1740 ceph_decode_need(&p, end, object_len, bad);
1741 p += object_len;
1742
ef4859d6 1743 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1744 if (err)
f24e9980 1745 goto bad;
1b83bef2
SW		 1746
1747 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1748 flags = ceph_decode_64(&p);
1749 result = ceph_decode_32(&p);
1750 reassert_epoch = ceph_decode_32(&p);
1751 reassert_version = ceph_decode_64(&p);
1752 osdmap_epoch = ceph_decode_32(&p);
1753
f24e9980 1754 /* lookup */
ff513ace 1755 down_read(&osdc->map_sem);
f24e9980
SW		 1756 mutex_lock(&osdc->request_mutex);
1757 req = __lookup_request(osdc, tid);
1758 if (req == NULL) {
1759 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1760 goto bad_mutex;
f24e9980
SW		 1761 }
1762 ceph_osdc_get_request(req);
1b83bef2
SW		 1763
1764 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1765 req, result);
1766
18741196 1767 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2
SW		 1768 numops = ceph_decode_32(&p);
1769 if (numops > CEPH_OSD_MAX_OP)
1770 goto bad_put;
1771 if (numops != req->r_num_ops)
1772 goto bad_put;
1773 payload_len = 0;
18741196 1774 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1775 for (i = 0; i < numops; i++) {
1776 struct ceph_osd_op *op = p;
1777 int len;
1778
1779 len = le32_to_cpu(op->payload_len);
1780 req->r_reply_op_len[i] = len;
1781 dout(" op %d has %d bytes\n", i, len);
1782 payload_len += len;
1783 p += sizeof(*op);
1784 }
9fc6e064
AE		 1785 bytes = le32_to_cpu(msg->hdr.data_len);
1786 if (payload_len != bytes) {
1b83bef2 1787 pr_warning("sum of op payload lens %d != data_len %d",
9fc6e064 1788 payload_len, bytes);
1b83bef2
SW		 1789 goto bad_put;
1790 }
1791
18741196 1792 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1793 retry_attempt = ceph_decode_32(&p);
1794 for (i = 0; i < numops; i++)
1795 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1796
205ee118
ID		 1797 if (le16_to_cpu(msg->hdr.version) >= 6) {
1798 p += 8 + 4; /* skip replay_version */
1799 p += 8; /* skip user_version */
eb845ff1 1800
205ee118
ID		 1801 err = ceph_redirect_decode(&p, end, &redir);
1802 if (err)
1803 goto bad_put;
1804 } else {
1805 redir.oloc.pool = -1;
1806 }
f24e9980 1807
205ee118
ID		 1808 if (redir.oloc.pool != -1) {
1809 dout("redirect pool %lld\n", redir.oloc.pool);
1810
1811 __unregister_request(osdc, req);
205ee118
ID		 1812
1813 req->r_target_oloc = redir.oloc; /* struct */
1814
1815 /*
1816 * Start redirect requests with nofail=true. If
1817 * mapping fails, request will end up on the notarget
1818 * list, waiting for the new osdmap (which can take
1819 * a while), even though the original request mapped
1820 * successfully. In the future we might want to follow
1821 * original request's nofail setting here.
1822 */
ff513ace 1823 err = __ceph_osdc_start_request(osdc, req, true);
205ee118
ID		 1824 BUG_ON(err);
1825
ff513ace 1826 goto out_unlock;
205ee118
ID		 1827 }
1828
1829 already_completed = req->r_got_reply;
1830 if (!req->r_got_reply) {
1b83bef2 1831 req->r_result = result;
f24e9980
SW		 1832 dout("handle_reply result %d bytes %d\n", req->r_result,
1833 bytes);
1834 if (req->r_result == 0)
1835 req->r_result = bytes;
1836
1837 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1838 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1839 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1840
1841 req->r_got_reply = 1;
1842 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1843 dout("handle_reply tid %llu dup ack\n", tid);
ff513ace 1844 goto out_unlock;
f24e9980
SW		 1845 }
1846
1847 dout("handle_reply tid %llu flags %d\n", tid, flags);
1848
a40c4f10
YS		 1849 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1850 __register_linger_request(osdc, req);
1851
f24e9980 1852 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1853 if (result < 0 ||
1854 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1855 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1856 __unregister_request(osdc, req);
1857
1858 mutex_unlock(&osdc->request_mutex);
ff513ace 1859 up_read(&osdc->map_sem);
f24e9980 1860
eb845ff1 1861 if (!already_completed) {
61c5d6bf
YZ		 1862 if (req->r_unsafe_callback &&
1863 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1864 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1865 if (req->r_callback)
1866 req->r_callback(req, msg);
1867 else
1868 complete_all(&req->r_completion);
1869 }
f24e9980 1870
61c5d6bf
YZ		 1871 if (flags & CEPH_OSD_FLAG_ONDISK) {
1872 if (req->r_unsafe_callback && already_completed)
1873 req->r_unsafe_callback(req, false);
25845472 1874 complete_request(req);
61c5d6bf 1875 }
f24e9980 1876
ff513ace 1877out:
a40c4f10 1878 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1879 ceph_osdc_put_request(req);
1880 return;
ff513ace
ID		 1881out_unlock:
1882 mutex_unlock(&osdc->request_mutex);
1883 up_read(&osdc->map_sem);
1884 goto out;
f24e9980 1885
1b83bef2 1886bad_put:
37c89bde
LW		 1887 req->r_result = -EIO;
1888 __unregister_request(osdc, req);
1889 if (req->r_callback)
1890 req->r_callback(req, msg);
1891 else
1892 complete_all(&req->r_completion);
1893 complete_request(req);
1b83bef2 1894 ceph_osdc_put_request(req);
8058fd45
AE		 1895bad_mutex:
1896 mutex_unlock(&osdc->request_mutex);
ff513ace 1897 up_read(&osdc->map_sem);
f24e9980 1898bad:
1b83bef2
SW		 1899 pr_err("corrupt osd_op_reply got %d %d\n",
1900 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1901 ceph_msg_dump(msg);
f24e9980
SW		 1902}
1903
6f6c7006 1904static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1905{
f24e9980 1906 struct rb_node *p, *n;
f24e9980 1907
6f6c7006
SW		 1908 for (p = rb_first(&osdc->osds); p; p = n) {
1909 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1910
6f6c7006
SW		 1911 n = rb_next(p);
1912 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1913 memcmp(&osd->o_con.peer_addr,
1914 ceph_osd_addr(osdc->osdmap,
1915 osd->o_osd),
1916 sizeof(struct ceph_entity_addr)) != 0)
1917 __reset_osd(osdc, osd);
f24e9980 1918 }
422d2cb8
YS		 1919}
1920
1921/*
6f6c7006
SW		 1922 * Requeue requests whose mapping to an OSD has changed. If requests map to
1923 * no osd, request a new map.
422d2cb8 1924 *
e6d50f67 1925 * Caller should hold map_sem for read.
422d2cb8 1926 */
9a1ea2db
JD		 1927static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1928 bool force_resend_writes)
422d2cb8 1929{
a40c4f10 1930 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1931 struct rb_node *p;
1932 int needmap = 0;
1933 int err;
9a1ea2db 1934 bool force_resend_req;
422d2cb8 1935
9a1ea2db
JD		 1936 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1937 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1938 mutex_lock(&osdc->request_mutex);
6194ea89 1939 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1940 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1941 p = rb_next(p);
ab60b16d
AE		 1942
1943 /*
1944 * For linger requests that have not yet been
1945 * registered, move them to the linger list; they'll
1946 * be sent to the osd in the loop below. Unregister
1947 * the request before re-registering it as a linger
1948 * request to ensure the __map_request() below
1949 * will decide it needs to be sent.
1950 */
1951 if (req->r_linger && list_empty(&req->r_linger_item)) {
1952 dout("%p tid %llu restart on osd%d\n",
1953 req, req->r_tid,
1954 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 1955 ceph_osdc_get_request(req);
ab60b16d
AE		 1956 __unregister_request(osdc, req);
1957 __register_linger_request(osdc, req);
96e4dac6 1958 ceph_osdc_put_request(req);
ab60b16d
AE		 1959 continue;
1960 }
1961
9a1ea2db
JD		 1962 force_resend_req = force_resend ||
1963 (force_resend_writes &&
1964 req->r_flags & CEPH_OSD_FLAG_WRITE);
1965 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 1966 if (err < 0)
1967 continue; /* error */
1968 if (req->r_osd == NULL) {
1969 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1970 needmap++; /* request a newer map */
1971 } else if (err > 0) {
6194ea89
SW		 1972 if (!req->r_linger) {
1973 dout("%p tid %llu requeued on osd%d\n", req,
1974 req->r_tid,
1975 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1976 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1977 }
1978 }
a40c4f10
YS		 1979 }
1980
1981 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1982 r_linger_item) {
1983 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1984
9a1ea2db
JD		 1985 err = __map_request(osdc, req,
1986 force_resend || force_resend_writes);
ab60b16d 1987 dout("__map_request returned %d\n", err);
a40c4f10
YS		 1988 if (err == 0)
1989 continue; /* no change and no osd was specified */
1990 if (err < 0)
1991 continue; /* hrm! */
1992 if (req->r_osd == NULL) {
1993 dout("tid %llu maps to no valid osd\n", req->r_tid);
1994 needmap++; /* request a newer map */
1995 continue;
6f6c7006 1996 }
a40c4f10
YS		 1997
1998 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1999 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 2000 __register_request(osdc, req);
c89ce05e 2001 __unregister_linger_request(osdc, req);
6f6c7006 2002 }
14d2f38d 2003 reset_changed_osds(osdc);
f24e9980
SW		 2004 mutex_unlock(&osdc->request_mutex);
2005
2006 if (needmap) {
2007 dout("%d requests for down osds, need new map\n", needmap);
2008 ceph_monc_request_next_osdmap(&osdc->client->monc);
2009 }
422d2cb8 2010}
6f6c7006
SW		 2011
2012
f24e9980
SW		 2013/*
2014 * Process updated osd map.
2015 *
2016 * The message contains any number of incremental and full maps, normally
2017 * indicating some sort of topology change in the cluster. Kick requests
2018 * off to different OSDs as needed.
2019 */
2020void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2021{
2022 void *p, *end, *next;
2023 u32 nr_maps, maplen;
2024 u32 epoch;
2025 struct ceph_osdmap *newmap = NULL, *oldmap;
2026 int err;
2027 struct ceph_fsid fsid;
9a1ea2db 2028 bool was_full;
f24e9980
SW		 2029
2030 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2031 p = msg->front.iov_base;
2032 end = p + msg->front.iov_len;
2033
2034 /* verify fsid */
2035 ceph_decode_need(&p, end, sizeof(fsid), bad);
2036 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 2037 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2038 return;
f24e9980
SW		 2039
2040 down_write(&osdc->map_sem);
2041
9a1ea2db
JD		 2042 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2043
f24e9980
SW		 2044 /* incremental maps */
2045 ceph_decode_32_safe(&p, end, nr_maps, bad);
2046 dout(" %d inc maps\n", nr_maps);
2047 while (nr_maps > 0) {
2048 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2049 epoch = ceph_decode_32(&p);
2050 maplen = ceph_decode_32(&p);
f24e9980
SW		 2051 ceph_decode_need(&p, end, maplen, bad);
2052 next = p + maplen;
2053 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2054 dout("applying incremental map %u len %d\n",
2055 epoch, maplen);
2056 newmap = osdmap_apply_incremental(&p, next,
2057 osdc->osdmap,
15d9882c 2058 &osdc->client->msgr);
f24e9980
SW		 2059 if (IS_ERR(newmap)) {
2060 err = PTR_ERR(newmap);
2061 goto bad;
2062 }
30dc6381 2063 BUG_ON(!newmap);
f24e9980
SW		 2064 if (newmap != osdc->osdmap) {
2065 ceph_osdmap_destroy(osdc->osdmap);
2066 osdc->osdmap = newmap;
2067 }
9a1ea2db
JD		 2068 was_full = was_full ||
2069 ceph_osdmap_flag(osdc->osdmap,
2070 CEPH_OSDMAP_FULL);
2071 kick_requests(osdc, 0, was_full);
f24e9980
SW		 2072 } else {
2073 dout("ignoring incremental map %u len %d\n",
2074 epoch, maplen);
2075 }
2076 p = next;
2077 nr_maps--;
2078 }
2079 if (newmap)
2080 goto done;
2081
2082 /* full maps */
2083 ceph_decode_32_safe(&p, end, nr_maps, bad);
2084 dout(" %d full maps\n", nr_maps);
2085 while (nr_maps) {
2086 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2087 epoch = ceph_decode_32(&p);
2088 maplen = ceph_decode_32(&p);
f24e9980
SW		 2089 ceph_decode_need(&p, end, maplen, bad);
2090 if (nr_maps > 1) {
2091 dout("skipping non-latest full map %u len %d\n",
2092 epoch, maplen);
2093 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2094 dout("skipping full map %u len %d, "
2095 "older than our %u\n", epoch, maplen,
2096 osdc->osdmap->epoch);
2097 } else {
38d6453c
SW		 2098 int skipped_map = 0;
2099
f24e9980 2100 dout("taking full map %u len %d\n", epoch, maplen);
a2505d63 2101 newmap = ceph_osdmap_decode(&p, p+maplen);
f24e9980
SW		 2102 if (IS_ERR(newmap)) {
2103 err = PTR_ERR(newmap);
2104 goto bad;
2105 }
30dc6381 2106 BUG_ON(!newmap);
f24e9980
SW		 2107 oldmap = osdc->osdmap;
2108 osdc->osdmap = newmap;
38d6453c
SW		 2109 if (oldmap) {
2110 if (oldmap->epoch + 1 < newmap->epoch)
2111 skipped_map = 1;
f24e9980 2112 ceph_osdmap_destroy(oldmap);
38d6453c 2113 }
9a1ea2db
JD		 2114 was_full = was_full ||
2115 ceph_osdmap_flag(osdc->osdmap,
2116 CEPH_OSDMAP_FULL);
2117 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2118 }
2119 p += maplen;
2120 nr_maps--;
2121 }
2122
b72e19b9
DC		 2123 if (!osdc->osdmap)
2124 goto bad;
f24e9980
SW		 2125done:
2126 downgrade_write(&osdc->map_sem);
2127 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 2128
2129 /*
2130 * subscribe to subsequent osdmap updates if full to ensure
2131 * we find out when we are no longer full and stop returning
2132 * ENOSPC.
2133 */
d29adb34
JD		 2134 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2135 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2136 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2137 ceph_monc_request_next_osdmap(&osdc->client->monc);
2138
f9d25199
AE		 2139 mutex_lock(&osdc->request_mutex);
2140 __send_queued(osdc);
2141 mutex_unlock(&osdc->request_mutex);
f24e9980 2142 up_read(&osdc->map_sem);
03066f23 2143 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2144 return;
2145
2146bad:
2147 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2148 ceph_msg_dump(msg);
f24e9980 2149 up_write(&osdc->map_sem);
f24e9980
SW		 2150}
2151
a40c4f10
YS		 2152/*
2153 * watch/notify callback event infrastructure
2154 *
2155 * These callbacks are used both for watch and notify operations.
2156 */
2157static void __release_event(struct kref *kref)
2158{
2159 struct ceph_osd_event *event =
2160 container_of(kref, struct ceph_osd_event, kref);
2161
2162 dout("__release_event %p\n", event);
2163 kfree(event);
2164}
2165
2166static void get_event(struct ceph_osd_event *event)
2167{
2168 kref_get(&event->kref);
2169}
2170
2171void ceph_osdc_put_event(struct ceph_osd_event *event)
2172{
2173 kref_put(&event->kref, __release_event);
2174}
2175EXPORT_SYMBOL(ceph_osdc_put_event);
2176
2177static void __insert_event(struct ceph_osd_client *osdc,
2178 struct ceph_osd_event *new)
2179{
2180 struct rb_node **p = &osdc->event_tree.rb_node;
2181 struct rb_node *parent = NULL;
2182 struct ceph_osd_event *event = NULL;
2183
2184 while (*p) {
2185 parent = *p;
2186 event = rb_entry(parent, struct ceph_osd_event, node);
2187 if (new->cookie < event->cookie)
2188 p = &(*p)->rb_left;
2189 else if (new->cookie > event->cookie)
2190 p = &(*p)->rb_right;
2191 else
2192 BUG();
2193 }
2194
2195 rb_link_node(&new->node, parent, p);
2196 rb_insert_color(&new->node, &osdc->event_tree);
2197}
2198
2199static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2200 u64 cookie)
2201{
2202 struct rb_node **p = &osdc->event_tree.rb_node;
2203 struct rb_node *parent = NULL;
2204 struct ceph_osd_event *event = NULL;
2205
2206 while (*p) {
2207 parent = *p;
2208 event = rb_entry(parent, struct ceph_osd_event, node);
2209 if (cookie < event->cookie)
2210 p = &(*p)->rb_left;
2211 else if (cookie > event->cookie)
2212 p = &(*p)->rb_right;
2213 else
2214 return event;
2215 }
2216 return NULL;
2217}
2218
2219static void __remove_event(struct ceph_osd_event *event)
2220{
2221 struct ceph_osd_client *osdc = event->osdc;
2222
2223 if (!RB_EMPTY_NODE(&event->node)) {
2224 dout("__remove_event removed %p\n", event);
2225 rb_erase(&event->node, &osdc->event_tree);
2226 ceph_osdc_put_event(event);
2227 } else {
2228 dout("__remove_event didn't remove %p\n", event);
2229 }
2230}
2231
2232int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2233 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2234 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2235{
2236 struct ceph_osd_event *event;
2237
2238 event = kmalloc(sizeof(*event), GFP_NOIO);
2239 if (!event)
2240 return -ENOMEM;
2241
2242 dout("create_event %p\n", event);
2243 event->cb = event_cb;
3c663bbd 2244 event->one_shot = 0;
a40c4f10
YS		 2245 event->data = data;
2246 event->osdc = osdc;
2247 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2248 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2249 kref_init(&event->kref); /* one ref for us */
2250 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2251
2252 spin_lock(&osdc->event_lock);
2253 event->cookie = ++osdc->event_count;
2254 __insert_event(osdc, event);
2255 spin_unlock(&osdc->event_lock);
2256
2257 *pevent = event;
2258 return 0;
2259}
2260EXPORT_SYMBOL(ceph_osdc_create_event);
2261
2262void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2263{
2264 struct ceph_osd_client *osdc = event->osdc;
2265
2266 dout("cancel_event %p\n", event);
2267 spin_lock(&osdc->event_lock);
2268 __remove_event(event);
2269 spin_unlock(&osdc->event_lock);
2270 ceph_osdc_put_event(event); /* caller's */
2271}
2272EXPORT_SYMBOL(ceph_osdc_cancel_event);
2273
2274
2275static void do_event_work(struct work_struct *work)
2276{
2277 struct ceph_osd_event_work *event_work =
2278 container_of(work, struct ceph_osd_event_work, work);
2279 struct ceph_osd_event *event = event_work->event;
2280 u64 ver = event_work->ver;
2281 u64 notify_id = event_work->notify_id;
2282 u8 opcode = event_work->opcode;
2283
2284 dout("do_event_work completing %p\n", event);
2285 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2286 dout("do_event_work completed %p\n", event);
2287 ceph_osdc_put_event(event);
2288 kfree(event_work);
2289}
2290
2291
2292/*
2293 * Process osd watch notifications
2294 */
3c663bbd
AE		 2295static void handle_watch_notify(struct ceph_osd_client *osdc,
2296 struct ceph_msg *msg)
a40c4f10
YS		 2297{
2298 void *p, *end;
2299 u8 proto_ver;
2300 u64 cookie, ver, notify_id;
2301 u8 opcode;
2302 struct ceph_osd_event *event;
2303 struct ceph_osd_event_work *event_work;
2304
2305 p = msg->front.iov_base;
2306 end = p + msg->front.iov_len;
2307
2308 ceph_decode_8_safe(&p, end, proto_ver, bad);
2309 ceph_decode_8_safe(&p, end, opcode, bad);
2310 ceph_decode_64_safe(&p, end, cookie, bad);
2311 ceph_decode_64_safe(&p, end, ver, bad);
2312 ceph_decode_64_safe(&p, end, notify_id, bad);
2313
2314 spin_lock(&osdc->event_lock);
2315 event = __find_event(osdc, cookie);
2316 if (event) {
3c663bbd 2317 BUG_ON(event->one_shot);
a40c4f10 2318 get_event(event);
a40c4f10
YS		 2319 }
2320 spin_unlock(&osdc->event_lock);
2321 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2322 cookie, ver, event);
2323 if (event) {
2324 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10
YS		 2325 if (!event_work) {
2326 dout("ERROR: could not allocate event_work\n");
2327 goto done_err;
2328 }
6b0ae409 2329 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2330 event_work->event = event;
2331 event_work->ver = ver;
2332 event_work->notify_id = notify_id;
2333 event_work->opcode = opcode;
2334 if (!queue_work(osdc->notify_wq, &event_work->work)) {
2335 dout("WARNING: failed to queue notify event work\n");
2336 goto done_err;
2337 }
2338 }
2339
2340 return;
2341
2342done_err:
a40c4f10
YS		 2343 ceph_osdc_put_event(event);
2344 return;
2345
2346bad:
2347 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 2348}
2349
e65550fd
AE		 2350/*
2351 * build new request AND message
2352 *
2353 */
2354void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2355 struct ceph_snap_context *snapc, u64 snap_id,
2356 struct timespec *mtime)
2357{
2358 struct ceph_msg *msg = req->r_request;
2359 void *p;
2360 size_t msg_size;
2361 int flags = req->r_flags;
2362 u64 data_len;
2363 unsigned int i;
2364
2365 req->r_snapid = snap_id;
2366 req->r_snapc = ceph_get_snap_context(snapc);
2367
2368 /* encode request */
2369 msg->hdr.version = cpu_to_le16(4);
2370
2371 p = msg->front.iov_base;
2372 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2373 req->r_request_osdmap_epoch = p;
2374 p += 4;
2375 req->r_request_flags = p;
2376 p += 4;
2377 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2378 ceph_encode_timespec(p, mtime);
2379 p += sizeof(struct ceph_timespec);
2380 req->r_request_reassert_version = p;
2381 p += sizeof(struct ceph_eversion); /* will get filled in */
2382
2383 /* oloc */
2384 ceph_encode_8(&p, 4);
2385 ceph_encode_8(&p, 4);
2386 ceph_encode_32(&p, 8 + 4 + 4);
2387 req->r_request_pool = p;
2388 p += 8;
2389 ceph_encode_32(&p, -1); /* preferred */
2390 ceph_encode_32(&p, 0); /* key len */
2391
2392 ceph_encode_8(&p, 1);
2393 req->r_request_pgid = p;
2394 p += 8 + 4;
2395 ceph_encode_32(&p, -1); /* preferred */
2396
2397 /* oid */
3c972c95
ID		 2398 ceph_encode_32(&p, req->r_base_oid.name_len);
2399 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2400 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2401 req->r_base_oid.name, req->r_base_oid.name_len);
2402 p += req->r_base_oid.name_len;
e65550fd
AE		 2403
2404 /* ops--can imply data */
2405 ceph_encode_16(&p, (u16)req->r_num_ops);
2406 data_len = 0;
2407 for (i = 0; i < req->r_num_ops; i++) {
2408 data_len += osd_req_encode_op(req, p, i);
2409 p += sizeof(struct ceph_osd_op);
2410 }
2411
2412 /* snaps */
2413 ceph_encode_64(&p, req->r_snapid);
2414 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2415 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2416 if (req->r_snapc) {
2417 for (i = 0; i < snapc->num_snaps; i++) {
2418 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2419 }
2420 }
2421
2422 req->r_request_attempts = p;
2423 p += 4;
2424
2425 /* data */
2426 if (flags & CEPH_OSD_FLAG_WRITE) {
2427 u16 data_off;
2428
2429 /*
2430 * The header "data_off" is a hint to the receiver
2431 * allowing it to align received data into its
2432 * buffers such that there's no need to re-copy
2433 * it before writing it to disk (direct I/O).
2434 */
2435 data_off = (u16) (off & 0xffff);
2436 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2437 }
2438 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2439
2440 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2441 msg_size = p - msg->front.iov_base;
2442 msg->front.iov_len = msg_size;
2443 msg->hdr.front_len = cpu_to_le32(msg_size);
2444
2445 dout("build_request msg_size was %d\n", (int)msg_size);
2446}
2447EXPORT_SYMBOL(ceph_osdc_build_request);
2448
70636773
AE		 2449/*
2450 * Register request, send initial attempt.
2451 */
2452int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2453 struct ceph_osd_request *req,
2454 bool nofail)
2455{
0bbfdfe8 2456 int rc;
70636773 2457
f24e9980
SW		 2458 down_read(&osdc->map_sem);
2459 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2460
2461 rc = __ceph_osdc_start_request(osdc, req, nofail);
2462
f24e9980
SW		 2463 mutex_unlock(&osdc->request_mutex);
2464 up_read(&osdc->map_sem);
0bbfdfe8 2465
f24e9980
SW		 2466 return rc;
2467}
3d14c5d2 2468EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980
SW		 2469
2470/*
2471 * wait for a request to complete
2472 */
2473int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2474 struct ceph_osd_request *req)
2475{
2476 int rc;
2477
2478 rc = wait_for_completion_interruptible(&req->r_completion);
2479 if (rc < 0) {
2480 mutex_lock(&osdc->request_mutex);
2481 __cancel_request(req);
529cfcc4 2482 __unregister_request(osdc, req);
f24e9980 2483 mutex_unlock(&osdc->request_mutex);
25845472 2484 complete_request(req);
529cfcc4 2485 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
f24e9980
SW		 2486 return rc;
2487 }
2488
2489 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2490 return req->r_result;
2491}
3d14c5d2 2492EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2493
2494/*
2495 * sync - wait for all in-flight requests to flush. avoid starvation.
2496 */
2497void ceph_osdc_sync(struct ceph_osd_client *osdc)
2498{
2499 struct ceph_osd_request *req;
2500 u64 last_tid, next_tid = 0;
2501
2502 mutex_lock(&osdc->request_mutex);
2503 last_tid = osdc->last_tid;
2504 while (1) {
2505 req = __lookup_request_ge(osdc, next_tid);
2506 if (!req)
2507 break;
2508 if (req->r_tid > last_tid)
2509 break;
2510
2511 next_tid = req->r_tid + 1;
2512 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2513 continue;
2514
2515 ceph_osdc_get_request(req);
2516 mutex_unlock(&osdc->request_mutex);
2517 dout("sync waiting on tid %llu (last is %llu)\n",
2518 req->r_tid, last_tid);
2519 wait_for_completion(&req->r_safe_completion);
2520 mutex_lock(&osdc->request_mutex);
2521 ceph_osdc_put_request(req);
2522 }
2523 mutex_unlock(&osdc->request_mutex);
2524 dout("sync done (thru tid %llu)\n", last_tid);
2525}
3d14c5d2 2526EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2527
dd935f44
JD		 2528/*
2529 * Call all pending notify callbacks - for use after a watch is
2530 * unregistered, to make sure no more callbacks for it will be invoked
2531 */
f6479449 2532void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44
JD		 2533{
2534 flush_workqueue(osdc->notify_wq);
2535}
2536EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2537
2538
f24e9980
SW		 2539/*
2540 * init, shutdown
2541 */
2542int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2543{
2544 int err;
2545
2546 dout("init\n");
2547 osdc->client = client;
2548 osdc->osdmap = NULL;
2549 init_rwsem(&osdc->map_sem);
2550 init_completion(&osdc->map_waiters);
2551 osdc->last_requested_map = 0;
2552 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2553 osdc->last_tid = 0;
2554 osdc->osds = RB_ROOT;
f5a2041b 2555 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2556 osdc->requests = RB_ROOT;
422d2cb8 2557 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2558 INIT_LIST_HEAD(&osdc->req_unsent);
2559 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2560 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2561 osdc->num_requests = 0;
2562 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2563 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2564 spin_lock_init(&osdc->event_lock);
2565 osdc->event_tree = RB_ROOT;
2566 osdc->event_count = 0;
f5a2041b
YS		 2567
2568 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2569 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2570
5f44f142 2571 err = -ENOMEM;
f24e9980
SW		 2572 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2573 sizeof(struct ceph_osd_request));
2574 if (!osdc->req_mempool)
5f44f142 2575 goto out;
f24e9980 2576
d50b409f
SW		 2577 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2578 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2579 "osd_op");
f24e9980 2580 if (err < 0)
5f44f142 2581 goto out_mempool;
d50b409f 2582 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2583 OSD_OPREPLY_FRONT_LEN, 10, true,
2584 "osd_op_reply");
c16e7869
SW		 2585 if (err < 0)
2586 goto out_msgpool;
a40c4f10 2587
dbcae088 2588 err = -ENOMEM;
a40c4f10 2589 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2590 if (!osdc->notify_wq)
c172ec5c
ID		 2591 goto out_msgpool_reply;
2592
f24e9980 2593 return 0;
5f44f142 2594
c172ec5c
ID		 2595out_msgpool_reply:
2596 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2597out_msgpool:
2598 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2599out_mempool:
2600 mempool_destroy(osdc->req_mempool);
2601out:
2602 return err;
f24e9980
SW		 2603}
2604
2605void ceph_osdc_stop(struct ceph_osd_client *osdc)
2606{
a40c4f10
YS		 2607 flush_workqueue(osdc->notify_wq);
2608 destroy_workqueue(osdc->notify_wq);
f24e9980 2609 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2610 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2611 if (osdc->osdmap) {
2612 ceph_osdmap_destroy(osdc->osdmap);
2613 osdc->osdmap = NULL;
2614 }
aca420bc 2615 remove_all_osds(osdc);
f24e9980
SW		 2616 mempool_destroy(osdc->req_mempool);
2617 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2618 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2619}
2620
2621/*
2622 * Read some contiguous pages. If we cross a stripe boundary, shorten
2623 * *plen. Return number of bytes read, or error.
2624 */
2625int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2626 struct ceph_vino vino, struct ceph_file_layout *layout,
2627 u64 off, u64 *plen,
2628 u32 truncate_seq, u64 truncate_size,
b7495fc2 2629 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2630{
2631 struct ceph_osd_request *req;
2632 int rc = 0;
2633
2634 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2635 vino.snap, off, *plen);
79528734 2636 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
f24e9980 2637 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2638 NULL, truncate_seq, truncate_size,
153e5167 2639 false);
6816282d
SW		 2640 if (IS_ERR(req))
2641 return PTR_ERR(req);
f24e9980
SW		 2642
2643 /* it may be a short read due to an object boundary */
0fff87ec 2644
406e2c9f 2645 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2646 pages, *plen, page_align, false, false);
f24e9980 2647
e0c59487 2648 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2649 off, *plen, *plen, page_align);
f24e9980 2650
79528734 2651 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2652
f24e9980
SW		 2653 rc = ceph_osdc_start_request(osdc, req, false);
2654 if (!rc)
2655 rc = ceph_osdc_wait_request(osdc, req);
2656
2657 ceph_osdc_put_request(req);
2658 dout("readpages result %d\n", rc);
2659 return rc;
2660}
3d14c5d2 2661EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2662
2663/*
2664 * do a synchronous write on N pages
2665 */
2666int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2667 struct ceph_file_layout *layout,
2668 struct ceph_snap_context *snapc,
2669 u64 off, u64 len,
2670 u32 truncate_seq, u64 truncate_size,
2671 struct timespec *mtime,
24808826 2672 struct page **pages, int num_pages)
f24e9980
SW		 2673{
2674 struct ceph_osd_request *req;
2675 int rc = 0;
b7495fc2 2676 int page_align = off & ~PAGE_MASK;
f24e9980 2677
acead002 2678 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
79528734 2679 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
f24e9980 2680 CEPH_OSD_OP_WRITE,
24808826 2681 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2682 snapc, truncate_seq, truncate_size,
153e5167 2683 true);
6816282d
SW		 2684 if (IS_ERR(req))
2685 return PTR_ERR(req);
f24e9980
SW		 2686
2687 /* it may be a short write due to an object boundary */
406e2c9f 2688 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2689 false, false);
2690 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2691
79528734 2692 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2693
87f979d3 2694 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2695 if (!rc)
2696 rc = ceph_osdc_wait_request(osdc, req);
2697
2698 ceph_osdc_put_request(req);
2699 if (rc == 0)
2700 rc = len;
2701 dout("writepages result %d\n", rc);
2702 return rc;
2703}
3d14c5d2 2704EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2705
5522ae0b
AE		 2706int ceph_osdc_setup(void)
2707{
2708 BUG_ON(ceph_osd_request_cache);
2709 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2710 sizeof (struct ceph_osd_request),
2711 __alignof__(struct ceph_osd_request),
2712 0, NULL);
2713
2714 return ceph_osd_request_cache ? 0 : -ENOMEM;
2715}
2716EXPORT_SYMBOL(ceph_osdc_setup);
2717
2718void ceph_osdc_cleanup(void)
2719{
2720 BUG_ON(!ceph_osd_request_cache);
2721 kmem_cache_destroy(ceph_osd_request_cache);
2722 ceph_osd_request_cache = NULL;
2723}
2724EXPORT_SYMBOL(ceph_osdc_cleanup);
2725
f24e9980
SW		 2726/*
2727 * handle incoming message
2728 */
2729static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2730{
2731 struct ceph_osd *osd = con->private;
32c895e7 2732 struct ceph_osd_client *osdc;
f24e9980
SW		 2733 int type = le16_to_cpu(msg->hdr.type);
2734
2735 if (!osd)
4a32f93d 2736 goto out;
32c895e7 2737 osdc = osd->o_osdc;
f24e9980
SW		 2738
2739 switch (type) {
2740 case CEPH_MSG_OSD_MAP:
2741 ceph_osdc_handle_map(osdc, msg);
2742 break;
2743 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2744 handle_reply(osdc, msg, con);
f24e9980 2745 break;
a40c4f10
YS		 2746 case CEPH_MSG_WATCH_NOTIFY:
2747 handle_watch_notify(osdc, msg);
2748 break;
f24e9980
SW		 2749
2750 default:
2751 pr_err("received unknown message type %d %s\n", type,
2752 ceph_msg_type_name(type));
2753 }
4a32f93d 2754out:
f24e9980
SW		 2755 ceph_msg_put(msg);
2756}
2757
5b3a4db3 2758/*
21b667f6
SW		 2759 * lookup and return message for incoming reply. set up reply message
2760 * pages.
5b3a4db3
SW		 2761 */
2762static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2763 struct ceph_msg_header *hdr,
2764 int *skip)
f24e9980
SW		 2765{
2766 struct ceph_osd *osd = con->private;
2767 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2768 struct ceph_msg *m;
0547a9b3 2769 struct ceph_osd_request *req;
3f0a4ac5 2770 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2771 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2772 u64 tid;
f24e9980 2773
0547a9b3
YS		 2774 tid = le64_to_cpu(hdr->tid);
2775 mutex_lock(&osdc->request_mutex);
2776 req = __lookup_request(osdc, tid);
2777 if (!req) {
2778 *skip = 1;
2779 m = NULL;
756a16a5
SW		 2780 dout("get_reply unknown tid %llu from osd%d\n", tid,
2781 osd->o_osd);
0547a9b3
YS		 2782 goto out;
2783 }
c16e7869 2784
ace6d3a9 2785 if (req->r_reply->con)
8921d114 2786 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2787 req->r_reply, req->r_reply->con);
2788 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2789
f2be82b0 2790 if (front_len > req->r_reply->front_alloc_len) {
4974341e 2791 pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
f2be82b0 2792 front_len, req->r_reply->front_alloc_len,
4974341e
AE		 2793 (unsigned int)con->peer_name.type,
2794 le64_to_cpu(con->peer_name.num));
3f0a4ac5
ID		 2795 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2796 false);
a79832f2 2797 if (!m)
c16e7869
SW		 2798 goto out;
2799 ceph_msg_put(req->r_reply);
2800 req->r_reply = m;
2801 }
2802 m = ceph_msg_get(req->r_reply);
2803
0547a9b3 2804 if (data_len > 0) {
a4ce40a9 2805 struct ceph_osd_data *osd_data;
0fff87ec 2806
a4ce40a9
AE		 2807 /*
2808 * XXX This is assuming there is only one op containing
2809 * XXX page data. Probably OK for reads, but this
2810 * XXX ought to be done more generally.
2811 */
406e2c9f 2812 osd_data = osd_req_op_extent_osd_data(req, 0);
0fff87ec 2813 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2814 if (osd_data->pages &&
e0c59487 2815 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2816
e0c59487
AE		 2817 pr_warning("tid %lld reply has %d bytes "
2818 "we had only %llu bytes ready\n",
2819 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2820 *skip = 1;
2821 ceph_msg_put(m);
2822 m = NULL;
2823 goto out;
2824 }
2ac2b7a6 2825 }
0547a9b3 2826 }
5b3a4db3 2827 *skip = 0;
c16e7869 2828 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2829
2830out:
2831 mutex_unlock(&osdc->request_mutex);
2450418c 2832 return m;
5b3a4db3
SW		 2833
2834}
2835
2836static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2837 struct ceph_msg_header *hdr,
2838 int *skip)
2839{
2840 struct ceph_osd *osd = con->private;
2841 int type = le16_to_cpu(hdr->type);
2842 int front = le32_to_cpu(hdr->front_len);
2843
1c20f2d2 2844 *skip = 0;
5b3a4db3
SW		 2845 switch (type) {
2846 case CEPH_MSG_OSD_MAP:
a40c4f10 2847 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2848 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2849 case CEPH_MSG_OSD_OPREPLY:
2850 return get_reply(con, hdr, skip);
2851 default:
2852 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2853 osd->o_osd);
2854 *skip = 1;
2855 return NULL;
2856 }
f24e9980
SW		 2857}
2858
2859/*
2860 * Wrappers to refcount containing ceph_osd struct
2861 */
2862static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2863{
2864 struct ceph_osd *osd = con->private;
2865 if (get_osd(osd))
2866 return con;
2867 return NULL;
2868}
2869
2870static void put_osd_con(struct ceph_connection *con)
2871{
2872 struct ceph_osd *osd = con->private;
2873 put_osd(osd);
2874}
2875
4e7a5dcd
SW		 2876/*
2877 * authentication
2878 */
a3530df3
AE		 2879/*
2880 * Note: returned pointer is the address of a structure that's
2881 * managed separately. Caller must *not* attempt to free it.
2882 */
2883static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2884 int *proto, int force_new)
4e7a5dcd
SW		 2885{
2886 struct ceph_osd *o = con->private;
2887 struct ceph_osd_client *osdc = o->o_osdc;
2888 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2889 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2890
74f1869f 2891 if (force_new && auth->authorizer) {
27859f97 2892 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2893 auth->authorizer = NULL;
2894 }
27859f97
SW		 2895 if (!auth->authorizer) {
2896 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2897 auth);
4e7a5dcd 2898 if (ret)
a3530df3 2899 return ERR_PTR(ret);
27859f97
SW		 2900 } else {
2901 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2902 auth);
2903 if (ret)
2904 return ERR_PTR(ret);
4e7a5dcd 2905 }
4e7a5dcd 2906 *proto = ac->protocol;
74f1869f 2907
a3530df3 2908 return auth;
4e7a5dcd
SW		 2909}
2910
2911
2912static int verify_authorizer_reply(struct ceph_connection *con, int len)
2913{
2914 struct ceph_osd *o = con->private;
2915 struct ceph_osd_client *osdc = o->o_osdc;
2916 struct ceph_auth_client *ac = osdc->client->monc.auth;
2917
27859f97 2918 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2919}
2920
9bd2e6f8
SW		 2921static int invalidate_authorizer(struct ceph_connection *con)
2922{
2923 struct ceph_osd *o = con->private;
2924 struct ceph_osd_client *osdc = o->o_osdc;
2925 struct ceph_auth_client *ac = osdc->client->monc.auth;
2926
27859f97 2927 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2928 return ceph_monc_validate_auth(&osdc->client->monc);
2929}
4e7a5dcd 2930
9e32789f 2931static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2932 .get = get_osd_con,
2933 .put = put_osd_con,
2934 .dispatch = dispatch,
4e7a5dcd
SW		 2935 .get_authorizer = get_authorizer,
2936 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2937 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2938 .alloc_msg = alloc_msg,
81b024e7 2939 .fault = osd_reset,
f24e9980 2940};
Linux 6.x block layer and io_uring tree(s)