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Merge tag 'pci-v3.19-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
[deliverable/linux.git] / net / ceph / osd_client.c
CommitLineData
a4ce40a9 1
3d14c5d2 2#include <linux/ceph/ceph_debug.h>
f24e9980 3
3d14c5d2 4#include <linux/module.h>
f24e9980
SW		 5#include <linux/err.h>
6#include <linux/highmem.h>
7#include <linux/mm.h>
8#include <linux/pagemap.h>
9#include <linux/slab.h>
10#include <linux/uaccess.h>
68b4476b
YS		 11#ifdef CONFIG_BLOCK
12#include <linux/bio.h>
13#endif
f24e9980 14
3d14c5d2
YS		 15#include <linux/ceph/libceph.h>
16#include <linux/ceph/osd_client.h>
17#include <linux/ceph/messenger.h>
18#include <linux/ceph/decode.h>
19#include <linux/ceph/auth.h>
20#include <linux/ceph/pagelist.h>
f24e9980 21
c16e7869
SW		 22#define OSD_OP_FRONT_LEN 4096
23#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 24
5522ae0b
AE		 25static struct kmem_cache *ceph_osd_request_cache;
26
9e32789f 27static const struct ceph_connection_operations osd_con_ops;
f24e9980 28
f9d25199 29static void __send_queued(struct ceph_osd_client *osdc);
6f6c7006 30static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
a40c4f10
YS		 31static void __register_request(struct ceph_osd_client *osdc,
32 struct ceph_osd_request *req);
2cc6128a
ID		 33static void __unregister_request(struct ceph_osd_client *osdc,
34 struct ceph_osd_request *req);
a40c4f10
YS		 35static void __unregister_linger_request(struct ceph_osd_client *osdc,
36 struct ceph_osd_request *req);
2cc6128a 37static void __enqueue_request(struct ceph_osd_request *req);
56e925b6
SW		 38static void __send_request(struct ceph_osd_client *osdc,
39 struct ceph_osd_request *req);
f24e9980
SW		 40
41/*
42 * Implement client access to distributed object storage cluster.
43 *
44 * All data objects are stored within a cluster/cloud of OSDs, or
45 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
46 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
47 * remote daemons serving up and coordinating consistent and safe
48 * access to storage.
49 *
50 * Cluster membership and the mapping of data objects onto storage devices
51 * are described by the osd map.
52 *
53 * We keep track of pending OSD requests (read, write), resubmit
54 * requests to different OSDs when the cluster topology/data layout
55 * change, or retry the affected requests when the communications
56 * channel with an OSD is reset.
57 */
58
59/*
60 * calculate the mapping of a file extent onto an object, and fill out the
61 * request accordingly. shorten extent as necessary if it crosses an
62 * object boundary.
63 *
64 * fill osd op in request message.
65 */
dbe0fc41 66static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 67 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 68{
60e56f13 69 u64 orig_len = *plen;
d63b77f4 70 int r;
f24e9980 71
60e56f13 72 /* object extent? */
75d1c941
AE		 73 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
74 objoff, objlen);
d63b77f4
SW		 75 if (r < 0)
76 return r;
75d1c941
AE		 77 if (*objlen < orig_len) {
78 *plen = *objlen;
60e56f13
AE		 79 dout(" skipping last %llu, final file extent %llu~%llu\n",
80 orig_len - *plen, off, *plen);
81 }
82
75d1c941 83 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
f24e9980 84
3ff5f385 85 return 0;
f24e9980
SW		 86}
87
c54d47bf
AE		 88static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
89{
90 memset(osd_data, 0, sizeof (*osd_data));
91 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
92}
93
a4ce40a9 94static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 95 struct page **pages, u64 length, u32 alignment,
96 bool pages_from_pool, bool own_pages)
97{
98 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
99 osd_data->pages = pages;
100 osd_data->length = length;
101 osd_data->alignment = alignment;
102 osd_data->pages_from_pool = pages_from_pool;
103 osd_data->own_pages = own_pages;
104}
43bfe5de 105
a4ce40a9 106static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 107 struct ceph_pagelist *pagelist)
108{
109 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
110 osd_data->pagelist = pagelist;
111}
43bfe5de
AE		 112
113#ifdef CONFIG_BLOCK
a4ce40a9 114static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 115 struct bio *bio, size_t bio_length)
116{
117 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
118 osd_data->bio = bio;
119 osd_data->bio_length = bio_length;
120}
43bfe5de
AE		 121#endif /* CONFIG_BLOCK */
122
863c7eb5
AE		 123#define osd_req_op_data(oreq, whch, typ, fld) \
124 ({ \
125 BUG_ON(whch >= (oreq)->r_num_ops); \
126 &(oreq)->r_ops[whch].typ.fld; \
127 })
128
49719778
AE		 129static struct ceph_osd_data *
130osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
131{
132 BUG_ON(which >= osd_req->r_num_ops);
133
134 return &osd_req->r_ops[which].raw_data_in;
135}
136
a4ce40a9
AE		 137struct ceph_osd_data *
138osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 139 unsigned int which)
a4ce40a9 140{
863c7eb5 141 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 142}
143EXPORT_SYMBOL(osd_req_op_extent_osd_data);
144
a4ce40a9
AE		 145struct ceph_osd_data *
146osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
147 unsigned int which)
148{
863c7eb5 149 return osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 150}
151EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
152
49719778
AE		 153void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
154 unsigned int which, struct page **pages,
155 u64 length, u32 alignment,
156 bool pages_from_pool, bool own_pages)
157{
158 struct ceph_osd_data *osd_data;
159
160 osd_data = osd_req_op_raw_data_in(osd_req, which);
161 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
162 pages_from_pool, own_pages);
163}
164EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
165
a4ce40a9 166void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 167 unsigned int which, struct page **pages,
168 u64 length, u32 alignment,
a4ce40a9
AE		 169 bool pages_from_pool, bool own_pages)
170{
171 struct ceph_osd_data *osd_data;
172
863c7eb5 173 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 174 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
175 pages_from_pool, own_pages);
a4ce40a9
AE		 176}
177EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
178
179void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 180 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 181{
182 struct ceph_osd_data *osd_data;
183
863c7eb5 184 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 185 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 186}
187EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
188
189#ifdef CONFIG_BLOCK
190void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 191 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 192{
193 struct ceph_osd_data *osd_data;
863c7eb5
AE		 194
195 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 196 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 197}
198EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
199#endif /* CONFIG_BLOCK */
200
201static void osd_req_op_cls_request_info_pagelist(
202 struct ceph_osd_request *osd_req,
203 unsigned int which, struct ceph_pagelist *pagelist)
204{
205 struct ceph_osd_data *osd_data;
206
863c7eb5 207 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 208 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 209}
210
04017e29
AE		 211void osd_req_op_cls_request_data_pagelist(
212 struct ceph_osd_request *osd_req,
213 unsigned int which, struct ceph_pagelist *pagelist)
214{
215 struct ceph_osd_data *osd_data;
216
863c7eb5 217 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29
AE		 218 ceph_osd_data_pagelist_init(osd_data, pagelist);
219}
220EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
221
6c57b554
AE		 222void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
223 unsigned int which, struct page **pages, u64 length,
224 u32 alignment, bool pages_from_pool, bool own_pages)
225{
226 struct ceph_osd_data *osd_data;
227
228 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
229 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
230 pages_from_pool, own_pages);
231}
232EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
233
a4ce40a9
AE		 234void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
235 unsigned int which, struct page **pages, u64 length,
236 u32 alignment, bool pages_from_pool, bool own_pages)
237{
238 struct ceph_osd_data *osd_data;
239
863c7eb5 240 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 241 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
242 pages_from_pool, own_pages);
a4ce40a9
AE		 243}
244EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
245
23c08a9c
AE		 246static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
247{
248 switch (osd_data->type) {
249 case CEPH_OSD_DATA_TYPE_NONE:
250 return 0;
251 case CEPH_OSD_DATA_TYPE_PAGES:
252 return osd_data->length;
253 case CEPH_OSD_DATA_TYPE_PAGELIST:
254 return (u64)osd_data->pagelist->length;
255#ifdef CONFIG_BLOCK
256 case CEPH_OSD_DATA_TYPE_BIO:
257 return (u64)osd_data->bio_length;
258#endif /* CONFIG_BLOCK */
259 default:
260 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
261 return 0;
262 }
263}
264
c54d47bf
AE		 265static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
266{
5476492f 267 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 268 int num_pages;
269
270 num_pages = calc_pages_for((u64)osd_data->alignment,
271 (u64)osd_data->length);
272 ceph_release_page_vector(osd_data->pages, num_pages);
273 }
5476492f
AE		 274 ceph_osd_data_init(osd_data);
275}
276
277static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
278 unsigned int which)
279{
280 struct ceph_osd_req_op *op;
281
282 BUG_ON(which >= osd_req->r_num_ops);
283 op = &osd_req->r_ops[which];
284
285 switch (op->op) {
286 case CEPH_OSD_OP_READ:
287 case CEPH_OSD_OP_WRITE:
288 ceph_osd_data_release(&op->extent.osd_data);
289 break;
290 case CEPH_OSD_OP_CALL:
291 ceph_osd_data_release(&op->cls.request_info);
04017e29 292 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 293 ceph_osd_data_release(&op->cls.response_data);
294 break;
d74b50be
YZ		 295 case CEPH_OSD_OP_SETXATTR:
296 case CEPH_OSD_OP_CMPXATTR:
297 ceph_osd_data_release(&op->xattr.osd_data);
298 break;
5476492f
AE		 299 default:
300 break;
301 }
c54d47bf
AE		 302}
303
f24e9980
SW		 304/*
305 * requests
306 */
9e94af20 307static void ceph_osdc_release_request(struct kref *kref)
f24e9980 308{
9e94af20
ID		 309 struct ceph_osd_request *req = container_of(kref,
310 struct ceph_osd_request, r_kref);
5476492f 311 unsigned int which;
415e49a9 312
9e94af20
ID		 313 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
314 req->r_request, req->r_reply);
6562d661
ID		 315 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
316 WARN_ON(!list_empty(&req->r_req_lru_item));
317 WARN_ON(!list_empty(&req->r_osd_item));
318 WARN_ON(!list_empty(&req->r_linger_item));
319 WARN_ON(!list_empty(&req->r_linger_osd_item));
320 WARN_ON(req->r_osd);
9e94af20 321
415e49a9
SW		 322 if (req->r_request)
323 ceph_msg_put(req->r_request);
ace6d3a9 324 if (req->r_reply) {
8921d114 325 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 326 ceph_msg_put(req->r_reply);
ace6d3a9 327 }
0fff87ec 328
5476492f
AE		 329 for (which = 0; which < req->r_num_ops; which++)
330 osd_req_op_data_release(req, which);
0fff87ec 331
415e49a9
SW		 332 ceph_put_snap_context(req->r_snapc);
333 if (req->r_mempool)
334 mempool_free(req, req->r_osdc->req_mempool);
335 else
5522ae0b
AE		 336 kmem_cache_free(ceph_osd_request_cache, req);
337
f24e9980 338}
9e94af20
ID		 339
340void ceph_osdc_get_request(struct ceph_osd_request *req)
341{
342 dout("%s %p (was %d)\n", __func__, req,
343 atomic_read(&req->r_kref.refcount));
344 kref_get(&req->r_kref);
345}
346EXPORT_SYMBOL(ceph_osdc_get_request);
347
348void ceph_osdc_put_request(struct ceph_osd_request *req)
349{
350 dout("%s %p (was %d)\n", __func__, req,
351 atomic_read(&req->r_kref.refcount));
352 kref_put(&req->r_kref, ceph_osdc_release_request);
353}
354EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 355
3499e8a5 356struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 357 struct ceph_snap_context *snapc,
1b83bef2 358 unsigned int num_ops,
3499e8a5 359 bool use_mempool,
54a54007 360 gfp_t gfp_flags)
f24e9980
SW		 361{
362 struct ceph_osd_request *req;
363 struct ceph_msg *msg;
1b83bef2
SW		 364 size_t msg_size;
365
79528734
AE		 366 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
367 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
368
1b83bef2
SW		 369 msg_size = 4 + 4 + 8 + 8 + 4+8;
370 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
371 msg_size += 1 + 8 + 4 + 4; /* pg_t */
2d0ebc5d 372 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
1b83bef2
SW		 373 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
374 msg_size += 8; /* snapid */
375 msg_size += 8; /* snap_seq */
376 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
377 msg_size += 4;
f24e9980
SW		 378
379 if (use_mempool) {
3499e8a5 380 req = mempool_alloc(osdc->req_mempool, gfp_flags);
f24e9980
SW		 381 memset(req, 0, sizeof(*req));
382 } else {
5522ae0b 383 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
f24e9980
SW		 384 }
385 if (req == NULL)
a79832f2 386 return NULL;
f24e9980 387
f24e9980
SW		 388 req->r_osdc = osdc;
389 req->r_mempool = use_mempool;
79528734 390 req->r_num_ops = num_ops;
68b4476b 391
415e49a9 392 kref_init(&req->r_kref);
f24e9980
SW		 393 init_completion(&req->r_completion);
394 init_completion(&req->r_safe_completion);
a978fa20 395 RB_CLEAR_NODE(&req->r_node);
f24e9980 396 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 397 INIT_LIST_HEAD(&req->r_linger_item);
1d0326b1 398 INIT_LIST_HEAD(&req->r_linger_osd_item);
935b639a 399 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 400 INIT_LIST_HEAD(&req->r_osd_item);
401
3c972c95 402 req->r_base_oloc.pool = -1;
205ee118 403 req->r_target_oloc.pool = -1;
22116525 404
c16e7869
SW		 405 /* create reply message */
406 if (use_mempool)
407 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
408 else
409 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
b61c2763 410 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
a79832f2 411 if (!msg) {
c16e7869 412 ceph_osdc_put_request(req);
a79832f2 413 return NULL;
c16e7869
SW		 414 }
415 req->r_reply = msg;
416
417 /* create request message; allow space for oid */
f24e9980 418 if (use_mempool)
8f3bc053 419 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 420 else
b61c2763 421 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
a79832f2 422 if (!msg) {
f24e9980 423 ceph_osdc_put_request(req);
a79832f2 424 return NULL;
f24e9980 425 }
68b4476b 426
f24e9980 427 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5
YS		 428
429 req->r_request = msg;
3499e8a5
YS		 430
431 return req;
432}
3d14c5d2 433EXPORT_SYMBOL(ceph_osdc_alloc_request);
3499e8a5 434
a8dd0a37 435static bool osd_req_opcode_valid(u16 opcode)
68b4476b 436{
a8dd0a37 437 switch (opcode) {
70b5bfa3
ID		 438#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
439__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
440#undef GENERATE_CASE
a8dd0a37
AE		 441 default:
442 return false;
443 }
444}
445
33803f33
AE		 446/*
447 * This is an osd op init function for opcodes that have no data or
448 * other information associated with them. It also serves as a
449 * common init routine for all the other init functions, below.
450 */
c99d2d4a 451static struct ceph_osd_req_op *
49719778 452_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
c99d2d4a 453 u16 opcode)
33803f33 454{
c99d2d4a
AE		 455 struct ceph_osd_req_op *op;
456
457 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 458 BUG_ON(!osd_req_opcode_valid(opcode));
459
c99d2d4a 460 op = &osd_req->r_ops[which];
33803f33 461 memset(op, 0, sizeof (*op));
33803f33 462 op->op = opcode;
c99d2d4a
AE		 463
464 return op;
33803f33
AE		 465}
466
49719778
AE		 467void osd_req_op_init(struct ceph_osd_request *osd_req,
468 unsigned int which, u16 opcode)
469{
470 (void)_osd_req_op_init(osd_req, which, opcode);
471}
472EXPORT_SYMBOL(osd_req_op_init);
473
c99d2d4a
AE		 474void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
475 unsigned int which, u16 opcode,
33803f33
AE		 476 u64 offset, u64 length,
477 u64 truncate_size, u32 truncate_seq)
478{
49719778 479 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33
AE		 480 size_t payload_len = 0;
481
ad7a60de 482 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197 483 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 484
33803f33
AE		 485 op->extent.offset = offset;
486 op->extent.length = length;
487 op->extent.truncate_size = truncate_size;
488 op->extent.truncate_seq = truncate_seq;
489 if (opcode == CEPH_OSD_OP_WRITE)
490 payload_len += length;
491
492 op->payload_len = payload_len;
493}
494EXPORT_SYMBOL(osd_req_op_extent_init);
495
c99d2d4a
AE		 496void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
497 unsigned int which, u64 length)
e5975c7c 498{
c99d2d4a
AE		 499 struct ceph_osd_req_op *op;
500 u64 previous;
501
502 BUG_ON(which >= osd_req->r_num_ops);
503 op = &osd_req->r_ops[which];
504 previous = op->extent.length;
e5975c7c
AE		 505
506 if (length == previous)
507 return; /* Nothing to do */
508 BUG_ON(length > previous);
509
510 op->extent.length = length;
511 op->payload_len -= previous - length;
512}
513EXPORT_SYMBOL(osd_req_op_extent_update);
514
c99d2d4a 515void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 516 u16 opcode, const char *class, const char *method)
33803f33 517{
49719778 518 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
5f562df5 519 struct ceph_pagelist *pagelist;
33803f33
AE		 520 size_t payload_len = 0;
521 size_t size;
522
523 BUG_ON(opcode != CEPH_OSD_OP_CALL);
524
5f562df5
AE		 525 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
526 BUG_ON(!pagelist);
527 ceph_pagelist_init(pagelist);
528
33803f33
AE		 529 op->cls.class_name = class;
530 size = strlen(class);
531 BUG_ON(size > (size_t) U8_MAX);
532 op->cls.class_len = size;
5f562df5 533 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 534 payload_len += size;
535
536 op->cls.method_name = method;
537 size = strlen(method);
538 BUG_ON(size > (size_t) U8_MAX);
539 op->cls.method_len = size;
5f562df5 540 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 541 payload_len += size;
542
a4ce40a9 543 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 544
33803f33
AE		 545 op->cls.argc = 0; /* currently unused */
546
547 op->payload_len = payload_len;
548}
549EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 550
d74b50be
YZ		 551int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
552 u16 opcode, const char *name, const void *value,
553 size_t size, u8 cmp_op, u8 cmp_mode)
554{
555 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
556 struct ceph_pagelist *pagelist;
557 size_t payload_len;
558
559 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
560
561 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
562 if (!pagelist)
563 return -ENOMEM;
564
565 ceph_pagelist_init(pagelist);
566
567 payload_len = strlen(name);
568 op->xattr.name_len = payload_len;
569 ceph_pagelist_append(pagelist, name, payload_len);
570
571 op->xattr.value_len = size;
572 ceph_pagelist_append(pagelist, value, size);
573 payload_len += size;
574
575 op->xattr.cmp_op = cmp_op;
576 op->xattr.cmp_mode = cmp_mode;
577
578 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
579 op->payload_len = payload_len;
580 return 0;
581}
582EXPORT_SYMBOL(osd_req_op_xattr_init);
583
c99d2d4a
AE		 584void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
585 unsigned int which, u16 opcode,
33803f33
AE		 586 u64 cookie, u64 version, int flag)
587{
49719778 588 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
33803f33 589
c99d2d4a 590 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 591
592 op->watch.cookie = cookie;
9ef1ee5a 593 op->watch.ver = version;
33803f33 594 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 595 op->watch.flag = (u8)1;
33803f33
AE		 596}
597EXPORT_SYMBOL(osd_req_op_watch_init);
598
c647b8a8
ID		 599void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
600 unsigned int which,
601 u64 expected_object_size,
602 u64 expected_write_size)
603{
604 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
605 CEPH_OSD_OP_SETALLOCHINT);
606
607 op->alloc_hint.expected_object_size = expected_object_size;
608 op->alloc_hint.expected_write_size = expected_write_size;
609
610 /*
611 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
612 * not worth a feature bit. Set FAILOK per-op flag to make
613 * sure older osds don't trip over an unsupported opcode.
614 */
615 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
616}
617EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
618
90af3602 619static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 620 struct ceph_osd_data *osd_data)
621{
622 u64 length = ceph_osd_data_length(osd_data);
623
624 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
625 BUG_ON(length > (u64) SIZE_MAX);
626 if (length)
90af3602 627 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 628 length, osd_data->alignment);
629 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
630 BUG_ON(!length);
90af3602 631 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 632#ifdef CONFIG_BLOCK
633 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 634 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 635#endif
636 } else {
637 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
638 }
639}
640
a8dd0a37 641static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 642 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 643{
79528734 644 struct ceph_osd_req_op *src;
04017e29 645 struct ceph_osd_data *osd_data;
54d50649 646 u64 request_data_len = 0;
04017e29 647 u64 data_length;
a8dd0a37 648
79528734
AE		 649 BUG_ON(which >= req->r_num_ops);
650 src = &req->r_ops[which];
a8dd0a37
AE		 651 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
652 pr_err("unrecognized osd opcode %d\n", src->op);
653
654 return 0;
655 }
656
657 switch (src->op) {
658 case CEPH_OSD_OP_STAT:
49719778
AE		 659 osd_data = &src->raw_data_in;
660 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 661 break;
662 case CEPH_OSD_OP_READ:
663 case CEPH_OSD_OP_WRITE:
ad7a60de 664 case CEPH_OSD_OP_ZERO:
ad7a60de 665 case CEPH_OSD_OP_TRUNCATE:
a8dd0a37 666 if (src->op == CEPH_OSD_OP_WRITE)
54d50649 667 request_data_len = src->extent.length;
a8dd0a37
AE		 668 dst->extent.offset = cpu_to_le64(src->extent.offset);
669 dst->extent.length = cpu_to_le64(src->extent.length);
670 dst->extent.truncate_size =
671 cpu_to_le64(src->extent.truncate_size);
672 dst->extent.truncate_seq =
673 cpu_to_le32(src->extent.truncate_seq);
04017e29 674 osd_data = &src->extent.osd_data;
5476492f 675 if (src->op == CEPH_OSD_OP_WRITE)
04017e29 676 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 677 else
04017e29 678 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 679 break;
680 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 681 dst->cls.class_len = src->cls.class_len;
682 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 683 osd_data = &src->cls.request_info;
684 ceph_osdc_msg_data_add(req->r_request, osd_data);
685 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
686 request_data_len = osd_data->pagelist->length;
687
688 osd_data = &src->cls.request_data;
689 data_length = ceph_osd_data_length(osd_data);
690 if (data_length) {
691 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
692 dst->cls.indata_len = cpu_to_le32(data_length);
693 ceph_osdc_msg_data_add(req->r_request, osd_data);
694 src->payload_len += data_length;
695 request_data_len += data_length;
696 }
697 osd_data = &src->cls.response_data;
698 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 699 break;
700 case CEPH_OSD_OP_STARTSYNC:
701 break;
702 case CEPH_OSD_OP_NOTIFY_ACK:
703 case CEPH_OSD_OP_WATCH:
704 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
705 dst->watch.ver = cpu_to_le64(src->watch.ver);
706 dst->watch.flag = src->watch.flag;
707 break;
c647b8a8
ID		 708 case CEPH_OSD_OP_SETALLOCHINT:
709 dst->alloc_hint.expected_object_size =
710 cpu_to_le64(src->alloc_hint.expected_object_size);
711 dst->alloc_hint.expected_write_size =
712 cpu_to_le64(src->alloc_hint.expected_write_size);
713 break;
d74b50be
YZ		 714 case CEPH_OSD_OP_SETXATTR:
715 case CEPH_OSD_OP_CMPXATTR:
716 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
717 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
718 dst->xattr.cmp_op = src->xattr.cmp_op;
719 dst->xattr.cmp_mode = src->xattr.cmp_mode;
720 osd_data = &src->xattr.osd_data;
721 ceph_osdc_msg_data_add(req->r_request, osd_data);
722 request_data_len = osd_data->pagelist->length;
723 break;
864e9197
YZ		 724 case CEPH_OSD_OP_CREATE:
725 case CEPH_OSD_OP_DELETE:
726 break;
a8dd0a37 727 default:
4c46459c 728 pr_err("unsupported osd opcode %s\n",
8f63ca2d 729 ceph_osd_op_name(src->op));
4c46459c 730 WARN_ON(1);
a8dd0a37
AE		 731
732 return 0;
68b4476b 733 }
7b25bf5f 734
a8dd0a37 735 dst->op = cpu_to_le16(src->op);
7b25bf5f 736 dst->flags = cpu_to_le32(src->flags);
68b4476b 737 dst->payload_len = cpu_to_le32(src->payload_len);
175face2 738
54d50649 739 return request_data_len;
68b4476b
YS		 740}
741
3499e8a5
YS		 742/*
743 * build new request AND message, calculate layout, and adjust file
744 * extent as needed.
745 *
746 * if the file was recently truncated, we include information about its
747 * old and new size so that the object can be updated appropriately. (we
748 * avoid synchronously deleting truncated objects because it's slow.)
749 *
750 * if @do_sync, include a 'startsync' command so that the osd will flush
751 * data quickly.
752 */
753struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
754 struct ceph_file_layout *layout,
755 struct ceph_vino vino,
715e4cd4
YZ		 756 u64 off, u64 *plen,
757 unsigned int which, int num_ops,
3499e8a5
YS		 758 int opcode, int flags,
759 struct ceph_snap_context *snapc,
3499e8a5
YS		 760 u32 truncate_seq,
761 u64 truncate_size,
153e5167 762 bool use_mempool)
3499e8a5 763{
68b4476b 764 struct ceph_osd_request *req;
75d1c941
AE		 765 u64 objnum = 0;
766 u64 objoff = 0;
767 u64 objlen = 0;
6816282d 768 int r;
68b4476b 769
ad7a60de 770 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 771 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
772 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 773
acead002 774 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 775 GFP_NOFS);
4ad12621 776 if (!req)
6816282d 777 return ERR_PTR(-ENOMEM);
79528734 778
d178a9e7 779 req->r_flags = flags;
3499e8a5
YS		 780
781 /* calculate max write size */
a19dadfb 782 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 783 if (r < 0) {
784 ceph_osdc_put_request(req);
6816282d 785 return ERR_PTR(r);
3ff5f385 786 }
a19dadfb 787
864e9197 788 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
715e4cd4 789 osd_req_op_init(req, which, opcode);
864e9197
YZ		 790 } else {
791 u32 object_size = le32_to_cpu(layout->fl_object_size);
792 u32 object_base = off - objoff;
793 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
794 if (truncate_size <= object_base) {
795 truncate_size = 0;
796 } else {
797 truncate_size -= object_base;
798 if (truncate_size > object_size)
799 truncate_size = object_size;
800 }
ccca4e37 801 }
715e4cd4 802 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 803 truncate_size, truncate_seq);
804 }
d18d1e28 805
3c972c95 806 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
3499e8a5 807
3c972c95 808 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
4295f221 809 "%llx.%08llx", vino.ino, objnum);
3c972c95 810 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
dbe0fc41 811
f24e9980
SW		 812 return req;
813}
3d14c5d2 814EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 815
816/*
817 * We keep osd requests in an rbtree, sorted by ->r_tid.
818 */
819static void __insert_request(struct ceph_osd_client *osdc,
820 struct ceph_osd_request *new)
821{
822 struct rb_node **p = &osdc->requests.rb_node;
823 struct rb_node *parent = NULL;
824 struct ceph_osd_request *req = NULL;
825
826 while (*p) {
827 parent = *p;
828 req = rb_entry(parent, struct ceph_osd_request, r_node);
829 if (new->r_tid < req->r_tid)
830 p = &(*p)->rb_left;
831 else if (new->r_tid > req->r_tid)
832 p = &(*p)->rb_right;
833 else
834 BUG();
835 }
836
837 rb_link_node(&new->r_node, parent, p);
838 rb_insert_color(&new->r_node, &osdc->requests);
839}
840
841static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
842 u64 tid)
843{
844 struct ceph_osd_request *req;
845 struct rb_node *n = osdc->requests.rb_node;
846
847 while (n) {
848 req = rb_entry(n, struct ceph_osd_request, r_node);
849 if (tid < req->r_tid)
850 n = n->rb_left;
851 else if (tid > req->r_tid)
852 n = n->rb_right;
853 else
854 return req;
855 }
856 return NULL;
857}
858
859static struct ceph_osd_request *
860__lookup_request_ge(struct ceph_osd_client *osdc,
861 u64 tid)
862{
863 struct ceph_osd_request *req;
864 struct rb_node *n = osdc->requests.rb_node;
865
866 while (n) {
867 req = rb_entry(n, struct ceph_osd_request, r_node);
868 if (tid < req->r_tid) {
869 if (!n->rb_left)
870 return req;
871 n = n->rb_left;
872 } else if (tid > req->r_tid) {
873 n = n->rb_right;
874 } else {
875 return req;
876 }
877 }
878 return NULL;
879}
880
2cc6128a
ID		 881static void __kick_linger_request(struct ceph_osd_request *req)
882{
883 struct ceph_osd_client *osdc = req->r_osdc;
884 struct ceph_osd *osd = req->r_osd;
885
886 /*
887 * Linger requests need to be resent with a new tid to avoid
888 * the dup op detection logic on the OSDs. Achieve this with
889 * a re-register dance instead of open-coding.
890 */
891 ceph_osdc_get_request(req);
892 if (!list_empty(&req->r_linger_item))
893 __unregister_linger_request(osdc, req);
894 else
895 __unregister_request(osdc, req);
896 __register_request(osdc, req);
897 ceph_osdc_put_request(req);
898
899 /*
900 * Unless request has been registered as both normal and
901 * lingering, __unregister{,_linger}_request clears r_osd.
902 * However, here we need to preserve r_osd to make sure we
903 * requeue on the same OSD.
904 */
905 WARN_ON(req->r_osd || !osd);
906 req->r_osd = osd;
907
908 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
909 __enqueue_request(req);
910}
911
6f6c7006
SW		 912/*
913 * Resubmit requests pending on the given osd.
914 */
915static void __kick_osd_requests(struct ceph_osd_client *osdc,
916 struct ceph_osd *osd)
917{
a40c4f10 918 struct ceph_osd_request *req, *nreq;
e02493c0 919 LIST_HEAD(resend);
2cc6128a 920 LIST_HEAD(resend_linger);
6f6c7006
SW		 921 int err;
922
2cc6128a 923 dout("%s osd%d\n", __func__, osd->o_osd);
6f6c7006 924 err = __reset_osd(osdc, osd);
685a7555 925 if (err)
6f6c7006 926 return;
2cc6128a 927
e02493c0
AE		 928 /*
929 * Build up a list of requests to resend by traversing the
930 * osd's list of requests. Requests for a given object are
931 * sent in tid order, and that is also the order they're
932 * kept on this list. Therefore all requests that are in
933 * flight will be found first, followed by all requests that
934 * have not yet been sent. And to resend requests while
935 * preserving this order we will want to put any sent
936 * requests back on the front of the osd client's unsent
937 * list.
938 *
939 * So we build a separate ordered list of already-sent
940 * requests for the affected osd and splice it onto the
941 * front of the osd client's unsent list. Once we've seen a
942 * request that has not yet been sent we're done. Those
943 * requests are already sitting right where they belong.
944 */
6f6c7006 945 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 946 if (!req->r_sent)
947 break;
2cc6128a
ID		 948
949 if (!req->r_linger) {
950 dout("%s requeueing %p tid %llu\n", __func__, req,
951 req->r_tid);
952 list_move_tail(&req->r_req_lru_item, &resend);
a40c4f10 953 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2cc6128a
ID		 954 } else {
955 list_move_tail(&req->r_req_lru_item, &resend_linger);
956 }
a40c4f10 957 }
e02493c0 958 list_splice(&resend, &osdc->req_unsent);
a40c4f10 959
e02493c0 960 /*
2cc6128a
ID		 961 * Both registered and not yet registered linger requests are
962 * enqueued with a new tid on the same OSD. We add/move them
963 * to req_unsent/o_requests at the end to keep things in tid
964 * order.
e02493c0 965 */
a40c4f10 966 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1d0326b1 967 r_linger_osd_item) {
2cc6128a
ID		 968 WARN_ON(!list_empty(&req->r_req_lru_item));
969 __kick_linger_request(req);
6f6c7006 970 }
2cc6128a
ID		 971
972 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
973 __kick_linger_request(req);
6f6c7006
SW		 974}
975
f24e9980 976/*
81b024e7 977 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 978 */
979static void osd_reset(struct ceph_connection *con)
980{
981 struct ceph_osd *osd = con->private;
982 struct ceph_osd_client *osdc;
983
984 if (!osd)
985 return;
986 dout("osd_reset osd%d\n", osd->o_osd);
987 osdc = osd->o_osdc;
f24e9980 988 down_read(&osdc->map_sem);
83aff95e
SW		 989 mutex_lock(&osdc->request_mutex);
990 __kick_osd_requests(osdc, osd);
f9d25199 991 __send_queued(osdc);
83aff95e 992 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 993 up_read(&osdc->map_sem);
994}
995
996/*
997 * Track open sessions with osds.
998 */
e10006f8 999static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1000{
1001 struct ceph_osd *osd;
1002
1003 osd = kzalloc(sizeof(*osd), GFP_NOFS);
1004 if (!osd)
1005 return NULL;
1006
1007 atomic_set(&osd->o_ref, 1);
1008 osd->o_osdc = osdc;
e10006f8 1009 osd->o_osd = onum;
f407731d 1010 RB_CLEAR_NODE(&osd->o_node);
f24e9980 1011 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 1012 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 1013 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 1014 osd->o_incarnation = 1;
1015
b7a9e5dd 1016 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1017
422d2cb8 1018 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 1019 return osd;
1020}
1021
1022static struct ceph_osd *get_osd(struct ceph_osd *osd)
1023{
1024 if (atomic_inc_not_zero(&osd->o_ref)) {
1025 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1026 atomic_read(&osd->o_ref));
1027 return osd;
1028 } else {
1029 dout("get_osd %p FAIL\n", osd);
1030 return NULL;
1031 }
1032}
1033
1034static void put_osd(struct ceph_osd *osd)
1035{
1036 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1037 atomic_read(&osd->o_ref) - 1);
a255651d 1038 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
79494d1b
SW		 1039 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
1040
27859f97 1041 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 1042 kfree(osd);
79494d1b 1043 }
f24e9980
SW		 1044}
1045
1046/*
1047 * remove an osd from our map
1048 */
f5a2041b 1049static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1050{
f5a2041b 1051 dout("__remove_osd %p\n", osd);
cc9f1f51
ID		 1052 WARN_ON(!list_empty(&osd->o_requests));
1053 WARN_ON(!list_empty(&osd->o_linger_requests));
7c6e6fc5 1054
f24e9980 1055 rb_erase(&osd->o_node, &osdc->osds);
f5a2041b 1056 list_del_init(&osd->o_osd_lru);
f24e9980
SW		 1057 ceph_con_close(&osd->o_con);
1058 put_osd(osd);
1059}
1060
aca420bc
SW		 1061static void remove_all_osds(struct ceph_osd_client *osdc)
1062{
048a9d2d 1063 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 1064 mutex_lock(&osdc->request_mutex);
1065 while (!RB_EMPTY_ROOT(&osdc->osds)) {
1066 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
1067 struct ceph_osd, o_node);
1068 __remove_osd(osdc, osd);
1069 }
1070 mutex_unlock(&osdc->request_mutex);
1071}
1072
f5a2041b
YS		 1073static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1074 struct ceph_osd *osd)
1075{
bbf37ec3 1076 dout("%s %p\n", __func__, osd);
f5a2041b 1077 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1078
f5a2041b 1079 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
3d14c5d2 1080 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
f5a2041b
YS		 1081}
1082
bbf37ec3
ID		 1083static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1084 struct ceph_osd *osd)
1085{
1086 dout("%s %p\n", __func__, osd);
1087
1088 if (list_empty(&osd->o_requests) &&
1089 list_empty(&osd->o_linger_requests))
1090 __move_osd_to_lru(osdc, osd);
1091}
1092
f5a2041b
YS		 1093static void __remove_osd_from_lru(struct ceph_osd *osd)
1094{
1095 dout("__remove_osd_from_lru %p\n", osd);
1096 if (!list_empty(&osd->o_osd_lru))
1097 list_del_init(&osd->o_osd_lru);
1098}
1099
aca420bc 1100static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 1101{
1102 struct ceph_osd *osd, *nosd;
1103
1104 dout("__remove_old_osds %p\n", osdc);
1105 mutex_lock(&osdc->request_mutex);
1106 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 1107 if (time_before(jiffies, osd->lru_ttl))
f5a2041b
YS		 1108 break;
1109 __remove_osd(osdc, osd);
1110 }
1111 mutex_unlock(&osdc->request_mutex);
1112}
1113
f24e9980
SW		 1114/*
1115 * reset osd connect
1116 */
f5a2041b 1117static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1118{
c3acb181 1119 struct ceph_entity_addr *peer_addr;
f24e9980 1120
f5a2041b 1121 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1122 if (list_empty(&osd->o_requests) &&
1123 list_empty(&osd->o_linger_requests)) {
f5a2041b 1124 __remove_osd(osdc, osd);
c3acb181
AE		 1125
1126 return -ENODEV;
1127 }
1128
1129 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1130 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1131 !ceph_con_opened(&osd->o_con)) {
1132 struct ceph_osd_request *req;
1133
0b4af2e8
ID		 1134 dout("osd addr hasn't changed and connection never opened, "
1135 "letting msgr retry\n");
87b315a5
SW		 1136 /* touch each r_stamp for handle_timeout()'s benfit */
1137 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1138 req->r_stamp = jiffies;
c3acb181
AE		 1139
1140 return -EAGAIN;
f24e9980 1141 }
c3acb181
AE		 1142
1143 ceph_con_close(&osd->o_con);
1144 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1145 osd->o_incarnation++;
1146
1147 return 0;
f24e9980
SW		 1148}
1149
1150static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1151{
1152 struct rb_node **p = &osdc->osds.rb_node;
1153 struct rb_node *parent = NULL;
1154 struct ceph_osd *osd = NULL;
1155
aca420bc 1156 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 1157 while (*p) {
1158 parent = *p;
1159 osd = rb_entry(parent, struct ceph_osd, o_node);
1160 if (new->o_osd < osd->o_osd)
1161 p = &(*p)->rb_left;
1162 else if (new->o_osd > osd->o_osd)
1163 p = &(*p)->rb_right;
1164 else
1165 BUG();
1166 }
1167
1168 rb_link_node(&new->o_node, parent, p);
1169 rb_insert_color(&new->o_node, &osdc->osds);
1170}
1171
1172static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1173{
1174 struct ceph_osd *osd;
1175 struct rb_node *n = osdc->osds.rb_node;
1176
1177 while (n) {
1178 osd = rb_entry(n, struct ceph_osd, o_node);
1179 if (o < osd->o_osd)
1180 n = n->rb_left;
1181 else if (o > osd->o_osd)
1182 n = n->rb_right;
1183 else
1184 return osd;
1185 }
1186 return NULL;
1187}
1188
422d2cb8
YS		 1189static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1190{
1191 schedule_delayed_work(&osdc->timeout_work,
3d14c5d2 1192 osdc->client->options->osd_keepalive_timeout * HZ);
422d2cb8
YS		 1193}
1194
1195static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1196{
1197 cancel_delayed_work(&osdc->timeout_work);
1198}
f24e9980
SW		 1199
1200/*
1201 * Register request, assign tid. If this is the first request, set up
1202 * the timeout event.
1203 */
a40c4f10
YS		 1204static void __register_request(struct ceph_osd_client *osdc,
1205 struct ceph_osd_request *req)
f24e9980 1206{
f24e9980 1207 req->r_tid = ++osdc->last_tid;
6df058c0 1208 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1209 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 1210 __insert_request(osdc, req);
1211 ceph_osdc_get_request(req);
1212 osdc->num_requests++;
f24e9980 1213 if (osdc->num_requests == 1) {
422d2cb8
YS		 1214 dout(" first request, scheduling timeout\n");
1215 __schedule_osd_timeout(osdc);
f24e9980 1216 }
a40c4f10
YS		 1217}
1218
f24e9980
SW		 1219/*
1220 * called under osdc->request_mutex
1221 */
1222static void __unregister_request(struct ceph_osd_client *osdc,
1223 struct ceph_osd_request *req)
1224{
35f9f8a0
SW		 1225 if (RB_EMPTY_NODE(&req->r_node)) {
1226 dout("__unregister_request %p tid %lld not registered\n",
1227 req, req->r_tid);
1228 return;
1229 }
1230
f24e9980
SW		 1231 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1232 rb_erase(&req->r_node, &osdc->requests);
6562d661 1233 RB_CLEAR_NODE(&req->r_node);
f24e9980
SW		 1234 osdc->num_requests--;
1235
0ba6478d
SW		 1236 if (req->r_osd) {
1237 /* make sure the original request isn't in flight. */
6740a845 1238 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1239
1240 list_del_init(&req->r_osd_item);
bbf37ec3 1241 maybe_move_osd_to_lru(osdc, req->r_osd);
4f23409e 1242 if (list_empty(&req->r_linger_osd_item))
a40c4f10 1243 req->r_osd = NULL;
0ba6478d 1244 }
f24e9980 1245
7d5f2481 1246 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1247 ceph_osdc_put_request(req);
1248
422d2cb8
YS		 1249 if (osdc->num_requests == 0) {
1250 dout(" no requests, canceling timeout\n");
1251 __cancel_osd_timeout(osdc);
f24e9980
SW		 1252 }
1253}
1254
1255/*
1256 * Cancel a previously queued request message
1257 */
1258static void __cancel_request(struct ceph_osd_request *req)
1259{
6bc18876 1260 if (req->r_sent && req->r_osd) {
6740a845 1261 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1262 req->r_sent = 0;
1263 }
1264}
1265
a40c4f10
YS		 1266static void __register_linger_request(struct ceph_osd_client *osdc,
1267 struct ceph_osd_request *req)
1268{
af593064
ID		 1269 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1270 WARN_ON(!req->r_linger);
1271
96e4dac6 1272 ceph_osdc_get_request(req);
a40c4f10 1273 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89 1274 if (req->r_osd)
1d0326b1 1275 list_add_tail(&req->r_linger_osd_item,
6194ea89 1276 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1277}
1278
1279static void __unregister_linger_request(struct ceph_osd_client *osdc,
1280 struct ceph_osd_request *req)
1281{
af593064
ID		 1282 WARN_ON(!req->r_linger);
1283
1284 if (list_empty(&req->r_linger_item)) {
1285 dout("%s %p tid %llu not registered\n", __func__, req,
1286 req->r_tid);
1287 return;
1288 }
1289
1290 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
61c74035 1291 list_del_init(&req->r_linger_item);
af593064 1292
a40c4f10 1293 if (req->r_osd) {
1d0326b1 1294 list_del_init(&req->r_linger_osd_item);
bbf37ec3 1295 maybe_move_osd_to_lru(osdc, req->r_osd);
fbdb9190
SW		 1296 if (list_empty(&req->r_osd_item))
1297 req->r_osd = NULL;
a40c4f10 1298 }
ba9d114e
ID		 1299
1300 list_del_init(&req->r_req_lru_item); /* can be on notarget */
96e4dac6 1301 ceph_osdc_put_request(req);
a40c4f10
YS		 1302}
1303
a40c4f10
YS		 1304void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1305 struct ceph_osd_request *req)
1306{
1307 if (!req->r_linger) {
1308 dout("set_request_linger %p\n", req);
1309 req->r_linger = 1;
a40c4f10
YS		 1310 }
1311}
1312EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1313
d29adb34
JD		 1314/*
1315 * Returns whether a request should be blocked from being sent
1316 * based on the current osdmap and osd_client settings.
1317 *
1318 * Caller should hold map_sem for read.
1319 */
1320static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1321 struct ceph_osd_request *req)
1322{
1323 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1324 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1325 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1326 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1327 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1328}
1329
17a13e40
ID		 1330/*
1331 * Calculate mapping of a request to a PG. Takes tiering into account.
1332 */
1333static int __calc_request_pg(struct ceph_osdmap *osdmap,
1334 struct ceph_osd_request *req,
1335 struct ceph_pg *pg_out)
1336{
205ee118
ID		 1337 bool need_check_tiering;
1338
1339 need_check_tiering = false;
1340 if (req->r_target_oloc.pool == -1) {
1341 req->r_target_oloc = req->r_base_oloc; /* struct */
1342 need_check_tiering = true;
1343 }
1344 if (req->r_target_oid.name_len == 0) {
1345 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1346 need_check_tiering = true;
1347 }
1348
1349 if (need_check_tiering &&
1350 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
17a13e40
ID		 1351 struct ceph_pg_pool_info *pi;
1352
205ee118 1353 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
17a13e40
ID		 1354 if (pi) {
1355 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1356 pi->read_tier >= 0)
205ee118 1357 req->r_target_oloc.pool = pi->read_tier;
17a13e40
ID		 1358 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1359 pi->write_tier >= 0)
205ee118 1360 req->r_target_oloc.pool = pi->write_tier;
17a13e40
ID		 1361 }
1362 /* !pi is caught in ceph_oloc_oid_to_pg() */
1363 }
1364
205ee118
ID		 1365 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1366 &req->r_target_oid, pg_out);
17a13e40
ID		 1367}
1368
f671b581
ID		 1369static void __enqueue_request(struct ceph_osd_request *req)
1370{
1371 struct ceph_osd_client *osdc = req->r_osdc;
1372
1373 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1374 req->r_osd ? req->r_osd->o_osd : -1);
1375
1376 if (req->r_osd) {
1377 __remove_osd_from_lru(req->r_osd);
1378 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1379 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1380 } else {
1381 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1382 }
1383}
1384
f24e9980
SW		 1385/*
1386 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1387 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1388 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1389 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1390 *
1391 * Return 0 if unchanged, 1 if changed, or negative on error.
1392 *
1393 * Caller should hold map_sem for read and request_mutex.
1394 */
6f6c7006 1395static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1396 struct ceph_osd_request *req, int force_resend)
f24e9980 1397{
5b191d99 1398 struct ceph_pg pgid;
d85b7056 1399 int acting[CEPH_PG_MAX_SIZE];
8008ab10 1400 int num, o;
f24e9980 1401 int err;
d29adb34 1402 bool was_paused;
f24e9980 1403
6f6c7006 1404 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40
ID		 1405
1406 err = __calc_request_pg(osdc->osdmap, req, &pgid);
6f6c7006
SW		 1407 if (err) {
1408 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1409 return err;
6f6c7006 1410 }
7740a42f
SW		 1411 req->r_pgid = pgid;
1412
8008ab10
ID		 1413 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o);
1414 if (num < 0)
1415 num = 0;
f24e9980 1416
d29adb34
JD		 1417 was_paused = req->r_paused;
1418 req->r_paused = __req_should_be_paused(osdc, req);
1419 if (was_paused && !req->r_paused)
1420 force_resend = 1;
1421
38d6453c
SW		 1422 if ((!force_resend &&
1423 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1424 req->r_sent >= req->r_osd->o_incarnation &&
1425 req->r_num_pg_osds == num &&
1426 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
d29adb34
JD		 1427 (req->r_osd == NULL && o == -1) ||
1428 req->r_paused)
f24e9980
SW		 1429 return 0; /* no change */
1430
5b191d99
SW		 1431 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1432 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1433 req->r_osd ? req->r_osd->o_osd : -1);
1434
d85b7056
SW		 1435 /* record full pg acting set */
1436 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1437 req->r_num_pg_osds = num;
1438
f24e9980
SW		 1439 if (req->r_osd) {
1440 __cancel_request(req);
1441 list_del_init(&req->r_osd_item);
a390de02 1442 list_del_init(&req->r_linger_osd_item);
f24e9980
SW		 1443 req->r_osd = NULL;
1444 }
1445
1446 req->r_osd = __lookup_osd(osdc, o);
1447 if (!req->r_osd && o >= 0) {
c99eb1c7 1448 err = -ENOMEM;
e10006f8 1449 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1450 if (!req->r_osd) {
1451 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1452 goto out;
6f6c7006 1453 }
f24e9980 1454
6f6c7006 1455 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1456 __insert_osd(osdc, req->r_osd);
1457
b7a9e5dd
SW		 1458 ceph_con_open(&req->r_osd->o_con,
1459 CEPH_ENTITY_TYPE_OSD, o,
1460 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1461 }
1462
f671b581 1463 __enqueue_request(req);
d85b7056 1464 err = 1; /* osd or pg changed */
f24e9980
SW		 1465
1466out:
f24e9980
SW		 1467 return err;
1468}
1469
1470/*
1471 * caller should hold map_sem (for read) and request_mutex
1472 */
56e925b6
SW		 1473static void __send_request(struct ceph_osd_client *osdc,
1474 struct ceph_osd_request *req)
f24e9980 1475{
1b83bef2 1476 void *p;
f24e9980 1477
1b83bef2
SW		 1478 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1479 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1480 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1481
1482 /* fill in message content that changes each time we send it */
1483 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1484 put_unaligned_le32(req->r_flags, req->r_request_flags);
205ee118 1485 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1b83bef2
SW		 1486 p = req->r_request_pgid;
1487 ceph_encode_64(&p, req->r_pgid.pool);
1488 ceph_encode_32(&p, req->r_pgid.seed);
1489 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1490 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1491 sizeof(req->r_reassert_version));
2169aea6 1492
3dd72fc0 1493 req->r_stamp = jiffies;
07a27e22 1494 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1495
1496 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1497
f24e9980 1498 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1499
1500 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1501}
1502
6f6c7006
SW		 1503/*
1504 * Send any requests in the queue (req_unsent).
1505 */
f9d25199 1506static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1507{
1508 struct ceph_osd_request *req, *tmp;
1509
f9d25199
AE		 1510 dout("__send_queued\n");
1511 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1512 __send_request(osdc, req);
6f6c7006
SW		 1513}
1514
0bbfdfe8
ID		 1515/*
1516 * Caller should hold map_sem for read and request_mutex.
1517 */
1518static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1519 struct ceph_osd_request *req,
1520 bool nofail)
1521{
1522 int rc;
1523
1524 __register_request(osdc, req);
1525 req->r_sent = 0;
1526 req->r_got_reply = 0;
1527 rc = __map_request(osdc, req, 0);
1528 if (rc < 0) {
1529 if (nofail) {
1530 dout("osdc_start_request failed map, "
1531 " will retry %lld\n", req->r_tid);
1532 rc = 0;
1533 } else {
1534 __unregister_request(osdc, req);
1535 }
1536 return rc;
1537 }
1538
1539 if (req->r_osd == NULL) {
1540 dout("send_request %p no up osds in pg\n", req);
1541 ceph_monc_request_next_osdmap(&osdc->client->monc);
1542 } else {
1543 __send_queued(osdc);
1544 }
1545
1546 return 0;
1547}
1548
f24e9980
SW		 1549/*
1550 * Timeout callback, called every N seconds when 1 or more osd
1551 * requests has been active for more than N seconds. When this
1552 * happens, we ping all OSDs with requests who have timed out to
1553 * ensure any communications channel reset is detected. Reset the
1554 * request timeouts another N seconds in the future as we go.
1555 * Reschedule the timeout event another N seconds in future (unless
1556 * there are no open requests).
1557 */
1558static void handle_timeout(struct work_struct *work)
1559{
1560 struct ceph_osd_client *osdc =
1561 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1562 struct ceph_osd_request *req;
f24e9980 1563 struct ceph_osd *osd;
422d2cb8 1564 unsigned long keepalive =
3d14c5d2 1565 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1566 struct list_head slow_osds;
f24e9980
SW		 1567 dout("timeout\n");
1568 down_read(&osdc->map_sem);
1569
1570 ceph_monc_request_next_osdmap(&osdc->client->monc);
1571
1572 mutex_lock(&osdc->request_mutex);
f24e9980 1573
422d2cb8
YS		 1574 /*
1575 * ping osds that are a bit slow. this ensures that if there
1576 * is a break in the TCP connection we will notice, and reopen
1577 * a connection with that osd (from the fault callback).
1578 */
1579 INIT_LIST_HEAD(&slow_osds);
1580 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1581 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1582 break;
1583
1584 osd = req->r_osd;
1585 BUG_ON(!osd);
1586 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1587 req->r_tid, osd->o_osd);
422d2cb8
YS		 1588 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1589 }
1590 while (!list_empty(&slow_osds)) {
1591 osd = list_entry(slow_osds.next, struct ceph_osd,
1592 o_keepalive_item);
1593 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1594 ceph_con_keepalive(&osd->o_con);
1595 }
1596
422d2cb8 1597 __schedule_osd_timeout(osdc);
f9d25199 1598 __send_queued(osdc);
f24e9980 1599 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1600 up_read(&osdc->map_sem);
1601}
1602
f5a2041b
YS		 1603static void handle_osds_timeout(struct work_struct *work)
1604{
1605 struct ceph_osd_client *osdc =
1606 container_of(work, struct ceph_osd_client,
1607 osds_timeout_work.work);
1608 unsigned long delay =
3d14c5d2 1609 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1610
1611 dout("osds timeout\n");
1612 down_read(&osdc->map_sem);
aca420bc 1613 remove_old_osds(osdc);
f5a2041b
YS		 1614 up_read(&osdc->map_sem);
1615
1616 schedule_delayed_work(&osdc->osds_timeout_work,
1617 round_jiffies_relative(delay));
1618}
1619
205ee118
ID		 1620static int ceph_oloc_decode(void **p, void *end,
1621 struct ceph_object_locator *oloc)
1622{
1623 u8 struct_v, struct_cv;
1624 u32 len;
1625 void *struct_end;
1626 int ret = 0;
1627
1628 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1629 struct_v = ceph_decode_8(p);
1630 struct_cv = ceph_decode_8(p);
1631 if (struct_v < 3) {
1632 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1633 struct_v, struct_cv);
1634 goto e_inval;
1635 }
1636 if (struct_cv > 6) {
1637 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1638 struct_v, struct_cv);
1639 goto e_inval;
1640 }
1641 len = ceph_decode_32(p);
1642 ceph_decode_need(p, end, len, e_inval);
1643 struct_end = *p + len;
1644
1645 oloc->pool = ceph_decode_64(p);
1646 *p += 4; /* skip preferred */
1647
1648 len = ceph_decode_32(p);
1649 if (len > 0) {
1650 pr_warn("ceph_object_locator::key is set\n");
1651 goto e_inval;
1652 }
1653
1654 if (struct_v >= 5) {
1655 len = ceph_decode_32(p);
1656 if (len > 0) {
1657 pr_warn("ceph_object_locator::nspace is set\n");
1658 goto e_inval;
1659 }
1660 }
1661
1662 if (struct_v >= 6) {
1663 s64 hash = ceph_decode_64(p);
1664 if (hash != -1) {
1665 pr_warn("ceph_object_locator::hash is set\n");
1666 goto e_inval;
1667 }
1668 }
1669
1670 /* skip the rest */
1671 *p = struct_end;
1672out:
1673 return ret;
1674
1675e_inval:
1676 ret = -EINVAL;
1677 goto out;
1678}
1679
1680static int ceph_redirect_decode(void **p, void *end,
1681 struct ceph_request_redirect *redir)
1682{
1683 u8 struct_v, struct_cv;
1684 u32 len;
1685 void *struct_end;
1686 int ret;
1687
1688 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1689 struct_v = ceph_decode_8(p);
1690 struct_cv = ceph_decode_8(p);
1691 if (struct_cv > 1) {
1692 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1693 struct_v, struct_cv);
1694 goto e_inval;
1695 }
1696 len = ceph_decode_32(p);
1697 ceph_decode_need(p, end, len, e_inval);
1698 struct_end = *p + len;
1699
1700 ret = ceph_oloc_decode(p, end, &redir->oloc);
1701 if (ret)
1702 goto out;
1703
1704 len = ceph_decode_32(p);
1705 if (len > 0) {
1706 pr_warn("ceph_request_redirect::object_name is set\n");
1707 goto e_inval;
1708 }
1709
1710 len = ceph_decode_32(p);
1711 *p += len; /* skip osd_instructions */
1712
1713 /* skip the rest */
1714 *p = struct_end;
1715out:
1716 return ret;
1717
1718e_inval:
1719 ret = -EINVAL;
1720 goto out;
1721}
1722
25845472
SW		 1723static void complete_request(struct ceph_osd_request *req)
1724{
25845472
SW		 1725 complete_all(&req->r_safe_completion); /* fsync waiter */
1726}
1727
f24e9980
SW		 1728/*
1729 * handle osd op reply. either call the callback if it is specified,
1730 * or do the completion to wake up the waiting thread.
1731 */
350b1c32
SW		 1732static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1733 struct ceph_connection *con)
f24e9980 1734{
1b83bef2 1735 void *p, *end;
f24e9980 1736 struct ceph_osd_request *req;
205ee118 1737 struct ceph_request_redirect redir;
f24e9980 1738 u64 tid;
1b83bef2 1739 int object_len;
79528734
AE		 1740 unsigned int numops;
1741 int payload_len, flags;
0ceed5db 1742 s32 result;
1b83bef2
SW		 1743 s32 retry_attempt;
1744 struct ceph_pg pg;
1745 int err;
1746 u32 reassert_epoch;
1747 u64 reassert_version;
1748 u32 osdmap_epoch;
0d5af164 1749 int already_completed;
9fc6e064 1750 u32 bytes;
79528734 1751 unsigned int i;
f24e9980 1752
6df058c0 1753 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1754 dout("handle_reply %p tid %llu\n", msg, tid);
1755
1756 p = msg->front.iov_base;
1757 end = p + msg->front.iov_len;
1758
1759 ceph_decode_need(&p, end, 4, bad);
1760 object_len = ceph_decode_32(&p);
1761 ceph_decode_need(&p, end, object_len, bad);
1762 p += object_len;
1763
ef4859d6 1764 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1765 if (err)
f24e9980 1766 goto bad;
1b83bef2
SW		 1767
1768 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1769 flags = ceph_decode_64(&p);
1770 result = ceph_decode_32(&p);
1771 reassert_epoch = ceph_decode_32(&p);
1772 reassert_version = ceph_decode_64(&p);
1773 osdmap_epoch = ceph_decode_32(&p);
1774
f24e9980 1775 /* lookup */
ff513ace 1776 down_read(&osdc->map_sem);
f24e9980
SW		 1777 mutex_lock(&osdc->request_mutex);
1778 req = __lookup_request(osdc, tid);
1779 if (req == NULL) {
1780 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1781 goto bad_mutex;
f24e9980
SW		 1782 }
1783 ceph_osdc_get_request(req);
1b83bef2
SW		 1784
1785 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1786 req, result);
1787
18741196 1788 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2
SW		 1789 numops = ceph_decode_32(&p);
1790 if (numops > CEPH_OSD_MAX_OP)
1791 goto bad_put;
1792 if (numops != req->r_num_ops)
1793 goto bad_put;
1794 payload_len = 0;
18741196 1795 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1796 for (i = 0; i < numops; i++) {
1797 struct ceph_osd_op *op = p;
1798 int len;
1799
1800 len = le32_to_cpu(op->payload_len);
1801 req->r_reply_op_len[i] = len;
1802 dout(" op %d has %d bytes\n", i, len);
1803 payload_len += len;
1804 p += sizeof(*op);
1805 }
9fc6e064
AE		 1806 bytes = le32_to_cpu(msg->hdr.data_len);
1807 if (payload_len != bytes) {
b9a67899
JP		 1808 pr_warn("sum of op payload lens %d != data_len %d\n",
1809 payload_len, bytes);
1b83bef2
SW		 1810 goto bad_put;
1811 }
1812
18741196 1813 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1814 retry_attempt = ceph_decode_32(&p);
1815 for (i = 0; i < numops; i++)
1816 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1817
205ee118
ID		 1818 if (le16_to_cpu(msg->hdr.version) >= 6) {
1819 p += 8 + 4; /* skip replay_version */
1820 p += 8; /* skip user_version */
eb845ff1 1821
205ee118
ID		 1822 err = ceph_redirect_decode(&p, end, &redir);
1823 if (err)
1824 goto bad_put;
1825 } else {
1826 redir.oloc.pool = -1;
1827 }
f24e9980 1828
205ee118
ID		 1829 if (redir.oloc.pool != -1) {
1830 dout("redirect pool %lld\n", redir.oloc.pool);
1831
1832 __unregister_request(osdc, req);
205ee118
ID		 1833
1834 req->r_target_oloc = redir.oloc; /* struct */
1835
1836 /*
1837 * Start redirect requests with nofail=true. If
1838 * mapping fails, request will end up on the notarget
1839 * list, waiting for the new osdmap (which can take
1840 * a while), even though the original request mapped
1841 * successfully. In the future we might want to follow
1842 * original request's nofail setting here.
1843 */
ff513ace 1844 err = __ceph_osdc_start_request(osdc, req, true);
205ee118
ID		 1845 BUG_ON(err);
1846
ff513ace 1847 goto out_unlock;
205ee118
ID		 1848 }
1849
1850 already_completed = req->r_got_reply;
1851 if (!req->r_got_reply) {
1b83bef2 1852 req->r_result = result;
f24e9980
SW		 1853 dout("handle_reply result %d bytes %d\n", req->r_result,
1854 bytes);
1855 if (req->r_result == 0)
1856 req->r_result = bytes;
1857
1858 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1859 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1860 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1861
1862 req->r_got_reply = 1;
1863 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1864 dout("handle_reply tid %llu dup ack\n", tid);
ff513ace 1865 goto out_unlock;
f24e9980
SW		 1866 }
1867
1868 dout("handle_reply tid %llu flags %d\n", tid, flags);
1869
a40c4f10
YS		 1870 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1871 __register_linger_request(osdc, req);
1872
f24e9980 1873 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1874 if (result < 0 ||
1875 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1876 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1877 __unregister_request(osdc, req);
1878
1879 mutex_unlock(&osdc->request_mutex);
ff513ace 1880 up_read(&osdc->map_sem);
f24e9980 1881
eb845ff1 1882 if (!already_completed) {
61c5d6bf
YZ		 1883 if (req->r_unsafe_callback &&
1884 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1885 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1886 if (req->r_callback)
1887 req->r_callback(req, msg);
1888 else
1889 complete_all(&req->r_completion);
1890 }
f24e9980 1891
61c5d6bf
YZ		 1892 if (flags & CEPH_OSD_FLAG_ONDISK) {
1893 if (req->r_unsafe_callback && already_completed)
1894 req->r_unsafe_callback(req, false);
25845472 1895 complete_request(req);
61c5d6bf 1896 }
f24e9980 1897
ff513ace 1898out:
a40c4f10 1899 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1900 ceph_osdc_put_request(req);
1901 return;
ff513ace
ID		 1902out_unlock:
1903 mutex_unlock(&osdc->request_mutex);
1904 up_read(&osdc->map_sem);
1905 goto out;
f24e9980 1906
1b83bef2 1907bad_put:
37c89bde
LW		 1908 req->r_result = -EIO;
1909 __unregister_request(osdc, req);
1910 if (req->r_callback)
1911 req->r_callback(req, msg);
1912 else
1913 complete_all(&req->r_completion);
1914 complete_request(req);
1b83bef2 1915 ceph_osdc_put_request(req);
8058fd45
AE		 1916bad_mutex:
1917 mutex_unlock(&osdc->request_mutex);
ff513ace 1918 up_read(&osdc->map_sem);
f24e9980 1919bad:
1b83bef2
SW		 1920 pr_err("corrupt osd_op_reply got %d %d\n",
1921 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1922 ceph_msg_dump(msg);
f24e9980
SW		 1923}
1924
6f6c7006 1925static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1926{
f24e9980 1927 struct rb_node *p, *n;
f24e9980 1928
6f6c7006
SW		 1929 for (p = rb_first(&osdc->osds); p; p = n) {
1930 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1931
6f6c7006
SW		 1932 n = rb_next(p);
1933 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1934 memcmp(&osd->o_con.peer_addr,
1935 ceph_osd_addr(osdc->osdmap,
1936 osd->o_osd),
1937 sizeof(struct ceph_entity_addr)) != 0)
1938 __reset_osd(osdc, osd);
f24e9980 1939 }
422d2cb8
YS		 1940}
1941
1942/*
6f6c7006
SW		 1943 * Requeue requests whose mapping to an OSD has changed. If requests map to
1944 * no osd, request a new map.
422d2cb8 1945 *
e6d50f67 1946 * Caller should hold map_sem for read.
422d2cb8 1947 */
9a1ea2db
JD		 1948static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1949 bool force_resend_writes)
422d2cb8 1950{
a40c4f10 1951 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1952 struct rb_node *p;
1953 int needmap = 0;
1954 int err;
9a1ea2db 1955 bool force_resend_req;
422d2cb8 1956
9a1ea2db
JD		 1957 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1958 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1959 mutex_lock(&osdc->request_mutex);
6194ea89 1960 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1961 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1962 p = rb_next(p);
ab60b16d
AE		 1963
1964 /*
1965 * For linger requests that have not yet been
1966 * registered, move them to the linger list; they'll
1967 * be sent to the osd in the loop below. Unregister
1968 * the request before re-registering it as a linger
1969 * request to ensure the __map_request() below
1970 * will decide it needs to be sent.
1971 */
1972 if (req->r_linger && list_empty(&req->r_linger_item)) {
1973 dout("%p tid %llu restart on osd%d\n",
1974 req, req->r_tid,
1975 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 1976 ceph_osdc_get_request(req);
ab60b16d
AE		 1977 __unregister_request(osdc, req);
1978 __register_linger_request(osdc, req);
96e4dac6 1979 ceph_osdc_put_request(req);
ab60b16d
AE		 1980 continue;
1981 }
1982
9a1ea2db
JD		 1983 force_resend_req = force_resend ||
1984 (force_resend_writes &&
1985 req->r_flags & CEPH_OSD_FLAG_WRITE);
1986 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 1987 if (err < 0)
1988 continue; /* error */
1989 if (req->r_osd == NULL) {
1990 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1991 needmap++; /* request a newer map */
1992 } else if (err > 0) {
6194ea89
SW		 1993 if (!req->r_linger) {
1994 dout("%p tid %llu requeued on osd%d\n", req,
1995 req->r_tid,
1996 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1997 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1998 }
1999 }
a40c4f10
YS		 2000 }
2001
2002 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
2003 r_linger_item) {
2004 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
2005
9a1ea2db
JD		 2006 err = __map_request(osdc, req,
2007 force_resend || force_resend_writes);
ab60b16d 2008 dout("__map_request returned %d\n", err);
a40c4f10
YS		 2009 if (err == 0)
2010 continue; /* no change and no osd was specified */
2011 if (err < 0)
2012 continue; /* hrm! */
2013 if (req->r_osd == NULL) {
2014 dout("tid %llu maps to no valid osd\n", req->r_tid);
2015 needmap++; /* request a newer map */
2016 continue;
6f6c7006 2017 }
a40c4f10
YS		 2018
2019 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
2020 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 2021 __register_request(osdc, req);
c89ce05e 2022 __unregister_linger_request(osdc, req);
6f6c7006 2023 }
14d2f38d 2024 reset_changed_osds(osdc);
f24e9980
SW		 2025 mutex_unlock(&osdc->request_mutex);
2026
2027 if (needmap) {
2028 dout("%d requests for down osds, need new map\n", needmap);
2029 ceph_monc_request_next_osdmap(&osdc->client->monc);
2030 }
422d2cb8 2031}
6f6c7006
SW		 2032
2033
f24e9980
SW		 2034/*
2035 * Process updated osd map.
2036 *
2037 * The message contains any number of incremental and full maps, normally
2038 * indicating some sort of topology change in the cluster. Kick requests
2039 * off to different OSDs as needed.
2040 */
2041void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2042{
2043 void *p, *end, *next;
2044 u32 nr_maps, maplen;
2045 u32 epoch;
2046 struct ceph_osdmap *newmap = NULL, *oldmap;
2047 int err;
2048 struct ceph_fsid fsid;
9a1ea2db 2049 bool was_full;
f24e9980
SW		 2050
2051 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2052 p = msg->front.iov_base;
2053 end = p + msg->front.iov_len;
2054
2055 /* verify fsid */
2056 ceph_decode_need(&p, end, sizeof(fsid), bad);
2057 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 2058 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2059 return;
f24e9980
SW		 2060
2061 down_write(&osdc->map_sem);
2062
9a1ea2db
JD		 2063 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2064
f24e9980
SW		 2065 /* incremental maps */
2066 ceph_decode_32_safe(&p, end, nr_maps, bad);
2067 dout(" %d inc maps\n", nr_maps);
2068 while (nr_maps > 0) {
2069 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2070 epoch = ceph_decode_32(&p);
2071 maplen = ceph_decode_32(&p);
f24e9980
SW		 2072 ceph_decode_need(&p, end, maplen, bad);
2073 next = p + maplen;
2074 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2075 dout("applying incremental map %u len %d\n",
2076 epoch, maplen);
2077 newmap = osdmap_apply_incremental(&p, next,
2078 osdc->osdmap,
15d9882c 2079 &osdc->client->msgr);
f24e9980
SW		 2080 if (IS_ERR(newmap)) {
2081 err = PTR_ERR(newmap);
2082 goto bad;
2083 }
30dc6381 2084 BUG_ON(!newmap);
f24e9980
SW		 2085 if (newmap != osdc->osdmap) {
2086 ceph_osdmap_destroy(osdc->osdmap);
2087 osdc->osdmap = newmap;
2088 }
9a1ea2db
JD		 2089 was_full = was_full ||
2090 ceph_osdmap_flag(osdc->osdmap,
2091 CEPH_OSDMAP_FULL);
2092 kick_requests(osdc, 0, was_full);
f24e9980
SW		 2093 } else {
2094 dout("ignoring incremental map %u len %d\n",
2095 epoch, maplen);
2096 }
2097 p = next;
2098 nr_maps--;
2099 }
2100 if (newmap)
2101 goto done;
2102
2103 /* full maps */
2104 ceph_decode_32_safe(&p, end, nr_maps, bad);
2105 dout(" %d full maps\n", nr_maps);
2106 while (nr_maps) {
2107 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2108 epoch = ceph_decode_32(&p);
2109 maplen = ceph_decode_32(&p);
f24e9980
SW		 2110 ceph_decode_need(&p, end, maplen, bad);
2111 if (nr_maps > 1) {
2112 dout("skipping non-latest full map %u len %d\n",
2113 epoch, maplen);
2114 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2115 dout("skipping full map %u len %d, "
2116 "older than our %u\n", epoch, maplen,
2117 osdc->osdmap->epoch);
2118 } else {
38d6453c
SW		 2119 int skipped_map = 0;
2120
f24e9980 2121 dout("taking full map %u len %d\n", epoch, maplen);
a2505d63 2122 newmap = ceph_osdmap_decode(&p, p+maplen);
f24e9980
SW		 2123 if (IS_ERR(newmap)) {
2124 err = PTR_ERR(newmap);
2125 goto bad;
2126 }
30dc6381 2127 BUG_ON(!newmap);
f24e9980
SW		 2128 oldmap = osdc->osdmap;
2129 osdc->osdmap = newmap;
38d6453c
SW		 2130 if (oldmap) {
2131 if (oldmap->epoch + 1 < newmap->epoch)
2132 skipped_map = 1;
f24e9980 2133 ceph_osdmap_destroy(oldmap);
38d6453c 2134 }
9a1ea2db
JD		 2135 was_full = was_full ||
2136 ceph_osdmap_flag(osdc->osdmap,
2137 CEPH_OSDMAP_FULL);
2138 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2139 }
2140 p += maplen;
2141 nr_maps--;
2142 }
2143
b72e19b9
DC		 2144 if (!osdc->osdmap)
2145 goto bad;
f24e9980
SW		 2146done:
2147 downgrade_write(&osdc->map_sem);
2148 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 2149
2150 /*
2151 * subscribe to subsequent osdmap updates if full to ensure
2152 * we find out when we are no longer full and stop returning
2153 * ENOSPC.
2154 */
d29adb34
JD		 2155 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2156 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2157 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2158 ceph_monc_request_next_osdmap(&osdc->client->monc);
2159
f9d25199
AE		 2160 mutex_lock(&osdc->request_mutex);
2161 __send_queued(osdc);
2162 mutex_unlock(&osdc->request_mutex);
f24e9980 2163 up_read(&osdc->map_sem);
03066f23 2164 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2165 return;
2166
2167bad:
2168 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2169 ceph_msg_dump(msg);
f24e9980 2170 up_write(&osdc->map_sem);
f24e9980
SW		 2171}
2172
a40c4f10
YS		 2173/*
2174 * watch/notify callback event infrastructure
2175 *
2176 * These callbacks are used both for watch and notify operations.
2177 */
2178static void __release_event(struct kref *kref)
2179{
2180 struct ceph_osd_event *event =
2181 container_of(kref, struct ceph_osd_event, kref);
2182
2183 dout("__release_event %p\n", event);
2184 kfree(event);
2185}
2186
2187static void get_event(struct ceph_osd_event *event)
2188{
2189 kref_get(&event->kref);
2190}
2191
2192void ceph_osdc_put_event(struct ceph_osd_event *event)
2193{
2194 kref_put(&event->kref, __release_event);
2195}
2196EXPORT_SYMBOL(ceph_osdc_put_event);
2197
2198static void __insert_event(struct ceph_osd_client *osdc,
2199 struct ceph_osd_event *new)
2200{
2201 struct rb_node **p = &osdc->event_tree.rb_node;
2202 struct rb_node *parent = NULL;
2203 struct ceph_osd_event *event = NULL;
2204
2205 while (*p) {
2206 parent = *p;
2207 event = rb_entry(parent, struct ceph_osd_event, node);
2208 if (new->cookie < event->cookie)
2209 p = &(*p)->rb_left;
2210 else if (new->cookie > event->cookie)
2211 p = &(*p)->rb_right;
2212 else
2213 BUG();
2214 }
2215
2216 rb_link_node(&new->node, parent, p);
2217 rb_insert_color(&new->node, &osdc->event_tree);
2218}
2219
2220static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2221 u64 cookie)
2222{
2223 struct rb_node **p = &osdc->event_tree.rb_node;
2224 struct rb_node *parent = NULL;
2225 struct ceph_osd_event *event = NULL;
2226
2227 while (*p) {
2228 parent = *p;
2229 event = rb_entry(parent, struct ceph_osd_event, node);
2230 if (cookie < event->cookie)
2231 p = &(*p)->rb_left;
2232 else if (cookie > event->cookie)
2233 p = &(*p)->rb_right;
2234 else
2235 return event;
2236 }
2237 return NULL;
2238}
2239
2240static void __remove_event(struct ceph_osd_event *event)
2241{
2242 struct ceph_osd_client *osdc = event->osdc;
2243
2244 if (!RB_EMPTY_NODE(&event->node)) {
2245 dout("__remove_event removed %p\n", event);
2246 rb_erase(&event->node, &osdc->event_tree);
2247 ceph_osdc_put_event(event);
2248 } else {
2249 dout("__remove_event didn't remove %p\n", event);
2250 }
2251}
2252
2253int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2254 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2255 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2256{
2257 struct ceph_osd_event *event;
2258
2259 event = kmalloc(sizeof(*event), GFP_NOIO);
2260 if (!event)
2261 return -ENOMEM;
2262
2263 dout("create_event %p\n", event);
2264 event->cb = event_cb;
3c663bbd 2265 event->one_shot = 0;
a40c4f10
YS		 2266 event->data = data;
2267 event->osdc = osdc;
2268 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2269 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2270 kref_init(&event->kref); /* one ref for us */
2271 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2272
2273 spin_lock(&osdc->event_lock);
2274 event->cookie = ++osdc->event_count;
2275 __insert_event(osdc, event);
2276 spin_unlock(&osdc->event_lock);
2277
2278 *pevent = event;
2279 return 0;
2280}
2281EXPORT_SYMBOL(ceph_osdc_create_event);
2282
2283void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2284{
2285 struct ceph_osd_client *osdc = event->osdc;
2286
2287 dout("cancel_event %p\n", event);
2288 spin_lock(&osdc->event_lock);
2289 __remove_event(event);
2290 spin_unlock(&osdc->event_lock);
2291 ceph_osdc_put_event(event); /* caller's */
2292}
2293EXPORT_SYMBOL(ceph_osdc_cancel_event);
2294
2295
2296static void do_event_work(struct work_struct *work)
2297{
2298 struct ceph_osd_event_work *event_work =
2299 container_of(work, struct ceph_osd_event_work, work);
2300 struct ceph_osd_event *event = event_work->event;
2301 u64 ver = event_work->ver;
2302 u64 notify_id = event_work->notify_id;
2303 u8 opcode = event_work->opcode;
2304
2305 dout("do_event_work completing %p\n", event);
2306 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2307 dout("do_event_work completed %p\n", event);
2308 ceph_osdc_put_event(event);
2309 kfree(event_work);
2310}
2311
2312
2313/*
2314 * Process osd watch notifications
2315 */
3c663bbd
AE		 2316static void handle_watch_notify(struct ceph_osd_client *osdc,
2317 struct ceph_msg *msg)
a40c4f10
YS		 2318{
2319 void *p, *end;
2320 u8 proto_ver;
2321 u64 cookie, ver, notify_id;
2322 u8 opcode;
2323 struct ceph_osd_event *event;
2324 struct ceph_osd_event_work *event_work;
2325
2326 p = msg->front.iov_base;
2327 end = p + msg->front.iov_len;
2328
2329 ceph_decode_8_safe(&p, end, proto_ver, bad);
2330 ceph_decode_8_safe(&p, end, opcode, bad);
2331 ceph_decode_64_safe(&p, end, cookie, bad);
2332 ceph_decode_64_safe(&p, end, ver, bad);
2333 ceph_decode_64_safe(&p, end, notify_id, bad);
2334
2335 spin_lock(&osdc->event_lock);
2336 event = __find_event(osdc, cookie);
2337 if (event) {
3c663bbd 2338 BUG_ON(event->one_shot);
a40c4f10 2339 get_event(event);
a40c4f10
YS		 2340 }
2341 spin_unlock(&osdc->event_lock);
2342 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2343 cookie, ver, event);
2344 if (event) {
2345 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10 2346 if (!event_work) {
91883cd2
ID		 2347 pr_err("couldn't allocate event_work\n");
2348 ceph_osdc_put_event(event);
2349 return;
a40c4f10 2350 }
6b0ae409 2351 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2352 event_work->event = event;
2353 event_work->ver = ver;
2354 event_work->notify_id = notify_id;
2355 event_work->opcode = opcode;
a40c4f10 2356
91883cd2
ID		 2357 queue_work(osdc->notify_wq, &event_work->work);
2358 }
a40c4f10 2359
a40c4f10
YS		 2360 return;
2361
2362bad:
2363 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 2364}
2365
e65550fd
AE		 2366/*
2367 * build new request AND message
2368 *
2369 */
2370void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2371 struct ceph_snap_context *snapc, u64 snap_id,
2372 struct timespec *mtime)
2373{
2374 struct ceph_msg *msg = req->r_request;
2375 void *p;
2376 size_t msg_size;
2377 int flags = req->r_flags;
2378 u64 data_len;
2379 unsigned int i;
2380
2381 req->r_snapid = snap_id;
2382 req->r_snapc = ceph_get_snap_context(snapc);
2383
2384 /* encode request */
2385 msg->hdr.version = cpu_to_le16(4);
2386
2387 p = msg->front.iov_base;
2388 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2389 req->r_request_osdmap_epoch = p;
2390 p += 4;
2391 req->r_request_flags = p;
2392 p += 4;
2393 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2394 ceph_encode_timespec(p, mtime);
2395 p += sizeof(struct ceph_timespec);
2396 req->r_request_reassert_version = p;
2397 p += sizeof(struct ceph_eversion); /* will get filled in */
2398
2399 /* oloc */
2400 ceph_encode_8(&p, 4);
2401 ceph_encode_8(&p, 4);
2402 ceph_encode_32(&p, 8 + 4 + 4);
2403 req->r_request_pool = p;
2404 p += 8;
2405 ceph_encode_32(&p, -1); /* preferred */
2406 ceph_encode_32(&p, 0); /* key len */
2407
2408 ceph_encode_8(&p, 1);
2409 req->r_request_pgid = p;
2410 p += 8 + 4;
2411 ceph_encode_32(&p, -1); /* preferred */
2412
2413 /* oid */
3c972c95
ID		 2414 ceph_encode_32(&p, req->r_base_oid.name_len);
2415 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2416 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2417 req->r_base_oid.name, req->r_base_oid.name_len);
2418 p += req->r_base_oid.name_len;
e65550fd
AE		 2419
2420 /* ops--can imply data */
2421 ceph_encode_16(&p, (u16)req->r_num_ops);
2422 data_len = 0;
2423 for (i = 0; i < req->r_num_ops; i++) {
2424 data_len += osd_req_encode_op(req, p, i);
2425 p += sizeof(struct ceph_osd_op);
2426 }
2427
2428 /* snaps */
2429 ceph_encode_64(&p, req->r_snapid);
2430 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2431 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2432 if (req->r_snapc) {
2433 for (i = 0; i < snapc->num_snaps; i++) {
2434 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2435 }
2436 }
2437
2438 req->r_request_attempts = p;
2439 p += 4;
2440
2441 /* data */
2442 if (flags & CEPH_OSD_FLAG_WRITE) {
2443 u16 data_off;
2444
2445 /*
2446 * The header "data_off" is a hint to the receiver
2447 * allowing it to align received data into its
2448 * buffers such that there's no need to re-copy
2449 * it before writing it to disk (direct I/O).
2450 */
2451 data_off = (u16) (off & 0xffff);
2452 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2453 }
2454 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2455
2456 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2457 msg_size = p - msg->front.iov_base;
2458 msg->front.iov_len = msg_size;
2459 msg->hdr.front_len = cpu_to_le32(msg_size);
2460
2461 dout("build_request msg_size was %d\n", (int)msg_size);
2462}
2463EXPORT_SYMBOL(ceph_osdc_build_request);
2464
70636773
AE		 2465/*
2466 * Register request, send initial attempt.
2467 */
2468int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2469 struct ceph_osd_request *req,
2470 bool nofail)
2471{
0bbfdfe8 2472 int rc;
70636773 2473
f24e9980
SW		 2474 down_read(&osdc->map_sem);
2475 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2476
2477 rc = __ceph_osdc_start_request(osdc, req, nofail);
2478
f24e9980
SW		 2479 mutex_unlock(&osdc->request_mutex);
2480 up_read(&osdc->map_sem);
0bbfdfe8 2481
f24e9980
SW		 2482 return rc;
2483}
3d14c5d2 2484EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 2485
c9f9b93d
ID		 2486/*
2487 * Unregister a registered request. The request is not completed (i.e.
2488 * no callbacks or wakeups) - higher layers are supposed to know what
2489 * they are canceling.
2490 */
2491void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2492{
2493 struct ceph_osd_client *osdc = req->r_osdc;
2494
2495 mutex_lock(&osdc->request_mutex);
2496 if (req->r_linger)
2497 __unregister_linger_request(osdc, req);
2498 __unregister_request(osdc, req);
2499 mutex_unlock(&osdc->request_mutex);
2500
2501 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2502}
2503EXPORT_SYMBOL(ceph_osdc_cancel_request);
2504
f24e9980
SW		 2505/*
2506 * wait for a request to complete
2507 */
2508int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2509 struct ceph_osd_request *req)
2510{
2511 int rc;
2512
c9f9b93d
ID		 2513 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2514
f24e9980
SW		 2515 rc = wait_for_completion_interruptible(&req->r_completion);
2516 if (rc < 0) {
c9f9b93d
ID		 2517 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2518 ceph_osdc_cancel_request(req);
25845472 2519 complete_request(req);
f24e9980
SW		 2520 return rc;
2521 }
2522
c9f9b93d
ID		 2523 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2524 req->r_result);
f24e9980
SW		 2525 return req->r_result;
2526}
3d14c5d2 2527EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2528
2529/*
2530 * sync - wait for all in-flight requests to flush. avoid starvation.
2531 */
2532void ceph_osdc_sync(struct ceph_osd_client *osdc)
2533{
2534 struct ceph_osd_request *req;
2535 u64 last_tid, next_tid = 0;
2536
2537 mutex_lock(&osdc->request_mutex);
2538 last_tid = osdc->last_tid;
2539 while (1) {
2540 req = __lookup_request_ge(osdc, next_tid);
2541 if (!req)
2542 break;
2543 if (req->r_tid > last_tid)
2544 break;
2545
2546 next_tid = req->r_tid + 1;
2547 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2548 continue;
2549
2550 ceph_osdc_get_request(req);
2551 mutex_unlock(&osdc->request_mutex);
2552 dout("sync waiting on tid %llu (last is %llu)\n",
2553 req->r_tid, last_tid);
2554 wait_for_completion(&req->r_safe_completion);
2555 mutex_lock(&osdc->request_mutex);
2556 ceph_osdc_put_request(req);
2557 }
2558 mutex_unlock(&osdc->request_mutex);
2559 dout("sync done (thru tid %llu)\n", last_tid);
2560}
3d14c5d2 2561EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2562
dd935f44
JD		 2563/*
2564 * Call all pending notify callbacks - for use after a watch is
2565 * unregistered, to make sure no more callbacks for it will be invoked
2566 */
f6479449 2567void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44
JD		 2568{
2569 flush_workqueue(osdc->notify_wq);
2570}
2571EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2572
2573
f24e9980
SW		 2574/*
2575 * init, shutdown
2576 */
2577int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2578{
2579 int err;
2580
2581 dout("init\n");
2582 osdc->client = client;
2583 osdc->osdmap = NULL;
2584 init_rwsem(&osdc->map_sem);
2585 init_completion(&osdc->map_waiters);
2586 osdc->last_requested_map = 0;
2587 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2588 osdc->last_tid = 0;
2589 osdc->osds = RB_ROOT;
f5a2041b 2590 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2591 osdc->requests = RB_ROOT;
422d2cb8 2592 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2593 INIT_LIST_HEAD(&osdc->req_unsent);
2594 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2595 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2596 osdc->num_requests = 0;
2597 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2598 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2599 spin_lock_init(&osdc->event_lock);
2600 osdc->event_tree = RB_ROOT;
2601 osdc->event_count = 0;
f5a2041b
YS		 2602
2603 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2604 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2605
5f44f142 2606 err = -ENOMEM;
f24e9980
SW		 2607 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2608 sizeof(struct ceph_osd_request));
2609 if (!osdc->req_mempool)
5f44f142 2610 goto out;
f24e9980 2611
d50b409f
SW		 2612 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2613 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2614 "osd_op");
f24e9980 2615 if (err < 0)
5f44f142 2616 goto out_mempool;
d50b409f 2617 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2618 OSD_OPREPLY_FRONT_LEN, 10, true,
2619 "osd_op_reply");
c16e7869
SW		 2620 if (err < 0)
2621 goto out_msgpool;
a40c4f10 2622
dbcae088 2623 err = -ENOMEM;
a40c4f10 2624 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2625 if (!osdc->notify_wq)
c172ec5c
ID		 2626 goto out_msgpool_reply;
2627
f24e9980 2628 return 0;
5f44f142 2629
c172ec5c
ID		 2630out_msgpool_reply:
2631 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2632out_msgpool:
2633 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2634out_mempool:
2635 mempool_destroy(osdc->req_mempool);
2636out:
2637 return err;
f24e9980
SW		 2638}
2639
2640void ceph_osdc_stop(struct ceph_osd_client *osdc)
2641{
a40c4f10
YS		 2642 flush_workqueue(osdc->notify_wq);
2643 destroy_workqueue(osdc->notify_wq);
f24e9980 2644 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2645 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2646 if (osdc->osdmap) {
2647 ceph_osdmap_destroy(osdc->osdmap);
2648 osdc->osdmap = NULL;
2649 }
aca420bc 2650 remove_all_osds(osdc);
f24e9980
SW		 2651 mempool_destroy(osdc->req_mempool);
2652 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2653 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2654}
2655
2656/*
2657 * Read some contiguous pages. If we cross a stripe boundary, shorten
2658 * *plen. Return number of bytes read, or error.
2659 */
2660int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2661 struct ceph_vino vino, struct ceph_file_layout *layout,
2662 u64 off, u64 *plen,
2663 u32 truncate_seq, u64 truncate_size,
b7495fc2 2664 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2665{
2666 struct ceph_osd_request *req;
2667 int rc = 0;
2668
2669 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2670 vino.snap, off, *plen);
715e4cd4 2671 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 2672 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2673 NULL, truncate_seq, truncate_size,
153e5167 2674 false);
6816282d
SW		 2675 if (IS_ERR(req))
2676 return PTR_ERR(req);
f24e9980
SW		 2677
2678 /* it may be a short read due to an object boundary */
0fff87ec 2679
406e2c9f 2680 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2681 pages, *plen, page_align, false, false);
f24e9980 2682
e0c59487 2683 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2684 off, *plen, *plen, page_align);
f24e9980 2685
79528734 2686 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2687
f24e9980
SW		 2688 rc = ceph_osdc_start_request(osdc, req, false);
2689 if (!rc)
2690 rc = ceph_osdc_wait_request(osdc, req);
2691
2692 ceph_osdc_put_request(req);
2693 dout("readpages result %d\n", rc);
2694 return rc;
2695}
3d14c5d2 2696EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2697
2698/*
2699 * do a synchronous write on N pages
2700 */
2701int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2702 struct ceph_file_layout *layout,
2703 struct ceph_snap_context *snapc,
2704 u64 off, u64 len,
2705 u32 truncate_seq, u64 truncate_size,
2706 struct timespec *mtime,
24808826 2707 struct page **pages, int num_pages)
f24e9980
SW		 2708{
2709 struct ceph_osd_request *req;
2710 int rc = 0;
b7495fc2 2711 int page_align = off & ~PAGE_MASK;
f24e9980 2712
acead002 2713 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
715e4cd4 2714 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
f24e9980 2715 CEPH_OSD_OP_WRITE,
24808826 2716 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2717 snapc, truncate_seq, truncate_size,
153e5167 2718 true);
6816282d
SW		 2719 if (IS_ERR(req))
2720 return PTR_ERR(req);
f24e9980
SW		 2721
2722 /* it may be a short write due to an object boundary */
406e2c9f 2723 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2724 false, false);
2725 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2726
79528734 2727 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2728
87f979d3 2729 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2730 if (!rc)
2731 rc = ceph_osdc_wait_request(osdc, req);
2732
2733 ceph_osdc_put_request(req);
2734 if (rc == 0)
2735 rc = len;
2736 dout("writepages result %d\n", rc);
2737 return rc;
2738}
3d14c5d2 2739EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2740
5522ae0b
AE		 2741int ceph_osdc_setup(void)
2742{
2743 BUG_ON(ceph_osd_request_cache);
2744 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2745 sizeof (struct ceph_osd_request),
2746 __alignof__(struct ceph_osd_request),
2747 0, NULL);
2748
2749 return ceph_osd_request_cache ? 0 : -ENOMEM;
2750}
2751EXPORT_SYMBOL(ceph_osdc_setup);
2752
2753void ceph_osdc_cleanup(void)
2754{
2755 BUG_ON(!ceph_osd_request_cache);
2756 kmem_cache_destroy(ceph_osd_request_cache);
2757 ceph_osd_request_cache = NULL;
2758}
2759EXPORT_SYMBOL(ceph_osdc_cleanup);
2760
f24e9980
SW		 2761/*
2762 * handle incoming message
2763 */
2764static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2765{
2766 struct ceph_osd *osd = con->private;
32c895e7 2767 struct ceph_osd_client *osdc;
f24e9980
SW		 2768 int type = le16_to_cpu(msg->hdr.type);
2769
2770 if (!osd)
4a32f93d 2771 goto out;
32c895e7 2772 osdc = osd->o_osdc;
f24e9980
SW		 2773
2774 switch (type) {
2775 case CEPH_MSG_OSD_MAP:
2776 ceph_osdc_handle_map(osdc, msg);
2777 break;
2778 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2779 handle_reply(osdc, msg, con);
f24e9980 2780 break;
a40c4f10
YS		 2781 case CEPH_MSG_WATCH_NOTIFY:
2782 handle_watch_notify(osdc, msg);
2783 break;
f24e9980
SW		 2784
2785 default:
2786 pr_err("received unknown message type %d %s\n", type,
2787 ceph_msg_type_name(type));
2788 }
4a32f93d 2789out:
f24e9980
SW		 2790 ceph_msg_put(msg);
2791}
2792
5b3a4db3 2793/*
21b667f6
SW		 2794 * lookup and return message for incoming reply. set up reply message
2795 * pages.
5b3a4db3
SW		 2796 */
2797static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2798 struct ceph_msg_header *hdr,
2799 int *skip)
f24e9980
SW		 2800{
2801 struct ceph_osd *osd = con->private;
2802 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2803 struct ceph_msg *m;
0547a9b3 2804 struct ceph_osd_request *req;
3f0a4ac5 2805 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2806 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2807 u64 tid;
f24e9980 2808
0547a9b3
YS		 2809 tid = le64_to_cpu(hdr->tid);
2810 mutex_lock(&osdc->request_mutex);
2811 req = __lookup_request(osdc, tid);
2812 if (!req) {
2813 *skip = 1;
2814 m = NULL;
756a16a5
SW		 2815 dout("get_reply unknown tid %llu from osd%d\n", tid,
2816 osd->o_osd);
0547a9b3
YS		 2817 goto out;
2818 }
c16e7869 2819
ace6d3a9 2820 if (req->r_reply->con)
8921d114 2821 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2822 req->r_reply, req->r_reply->con);
2823 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2824
f2be82b0 2825 if (front_len > req->r_reply->front_alloc_len) {
b9a67899
JP		 2826 pr_warn("get_reply front %d > preallocated %d (%u#%llu)\n",
2827 front_len, req->r_reply->front_alloc_len,
2828 (unsigned int)con->peer_name.type,
2829 le64_to_cpu(con->peer_name.num));
3f0a4ac5
ID		 2830 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2831 false);
a79832f2 2832 if (!m)
c16e7869
SW		 2833 goto out;
2834 ceph_msg_put(req->r_reply);
2835 req->r_reply = m;
2836 }
2837 m = ceph_msg_get(req->r_reply);
2838
0547a9b3 2839 if (data_len > 0) {
a4ce40a9 2840 struct ceph_osd_data *osd_data;
0fff87ec 2841
a4ce40a9
AE		 2842 /*
2843 * XXX This is assuming there is only one op containing
2844 * XXX page data. Probably OK for reads, but this
2845 * XXX ought to be done more generally.
2846 */
406e2c9f 2847 osd_data = osd_req_op_extent_osd_data(req, 0);
0fff87ec 2848 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2849 if (osd_data->pages &&
e0c59487 2850 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2851
b9a67899 2852 pr_warn("tid %lld reply has %d bytes we had only %llu bytes ready\n",
e0c59487 2853 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2854 *skip = 1;
2855 ceph_msg_put(m);
2856 m = NULL;
2857 goto out;
2858 }
2ac2b7a6 2859 }
0547a9b3 2860 }
5b3a4db3 2861 *skip = 0;
c16e7869 2862 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2863
2864out:
2865 mutex_unlock(&osdc->request_mutex);
2450418c 2866 return m;
5b3a4db3
SW		 2867
2868}
2869
2870static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2871 struct ceph_msg_header *hdr,
2872 int *skip)
2873{
2874 struct ceph_osd *osd = con->private;
2875 int type = le16_to_cpu(hdr->type);
2876 int front = le32_to_cpu(hdr->front_len);
2877
1c20f2d2 2878 *skip = 0;
5b3a4db3
SW		 2879 switch (type) {
2880 case CEPH_MSG_OSD_MAP:
a40c4f10 2881 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2882 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2883 case CEPH_MSG_OSD_OPREPLY:
2884 return get_reply(con, hdr, skip);
2885 default:
2886 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2887 osd->o_osd);
2888 *skip = 1;
2889 return NULL;
2890 }
f24e9980
SW		 2891}
2892
2893/*
2894 * Wrappers to refcount containing ceph_osd struct
2895 */
2896static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2897{
2898 struct ceph_osd *osd = con->private;
2899 if (get_osd(osd))
2900 return con;
2901 return NULL;
2902}
2903
2904static void put_osd_con(struct ceph_connection *con)
2905{
2906 struct ceph_osd *osd = con->private;
2907 put_osd(osd);
2908}
2909
4e7a5dcd
SW		 2910/*
2911 * authentication
2912 */
a3530df3
AE		 2913/*
2914 * Note: returned pointer is the address of a structure that's
2915 * managed separately. Caller must *not* attempt to free it.
2916 */
2917static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2918 int *proto, int force_new)
4e7a5dcd
SW		 2919{
2920 struct ceph_osd *o = con->private;
2921 struct ceph_osd_client *osdc = o->o_osdc;
2922 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2923 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2924
74f1869f 2925 if (force_new && auth->authorizer) {
27859f97 2926 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2927 auth->authorizer = NULL;
2928 }
27859f97
SW		 2929 if (!auth->authorizer) {
2930 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2931 auth);
4e7a5dcd 2932 if (ret)
a3530df3 2933 return ERR_PTR(ret);
27859f97
SW		 2934 } else {
2935 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2936 auth);
2937 if (ret)
2938 return ERR_PTR(ret);
4e7a5dcd 2939 }
4e7a5dcd 2940 *proto = ac->protocol;
74f1869f 2941
a3530df3 2942 return auth;
4e7a5dcd
SW		 2943}
2944
2945
2946static int verify_authorizer_reply(struct ceph_connection *con, int len)
2947{
2948 struct ceph_osd *o = con->private;
2949 struct ceph_osd_client *osdc = o->o_osdc;
2950 struct ceph_auth_client *ac = osdc->client->monc.auth;
2951
27859f97 2952 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2953}
2954
9bd2e6f8
SW		 2955static int invalidate_authorizer(struct ceph_connection *con)
2956{
2957 struct ceph_osd *o = con->private;
2958 struct ceph_osd_client *osdc = o->o_osdc;
2959 struct ceph_auth_client *ac = osdc->client->monc.auth;
2960
27859f97 2961 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2962 return ceph_monc_validate_auth(&osdc->client->monc);
2963}
4e7a5dcd 2964
33d07337
YZ		 2965static int sign_message(struct ceph_connection *con, struct ceph_msg *msg)
2966{
2967 struct ceph_osd *o = con->private;
2968 struct ceph_auth_handshake *auth = &o->o_auth;
2969 return ceph_auth_sign_message(auth, msg);
2970}
2971
2972static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg)
2973{
2974 struct ceph_osd *o = con->private;
2975 struct ceph_auth_handshake *auth = &o->o_auth;
2976 return ceph_auth_check_message_signature(auth, msg);
2977}
2978
9e32789f 2979static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2980 .get = get_osd_con,
2981 .put = put_osd_con,
2982 .dispatch = dispatch,
4e7a5dcd
SW		 2983 .get_authorizer = get_authorizer,
2984 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2985 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2986 .alloc_msg = alloc_msg,
33d07337
YZ		 2987 .sign_message = sign_message,
2988 .check_message_signature = check_message_signature,
81b024e7 2989 .fault = osd_reset,
f24e9980 2990};
Linux kernel - Deliverables
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