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libceph: pi->min_size, pi->last_force_request_resend
[mirror_ubuntu-disco-kernel.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 22#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 23
5522ae0b
AE		 24static struct kmem_cache *ceph_osd_request_cache;
25
9e32789f 26static const struct ceph_connection_operations osd_con_ops;
f24e9980 27
f9d25199 28static void __send_queued(struct ceph_osd_client *osdc);
6f6c7006 29static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
a40c4f10
YS		 30static void __register_request(struct ceph_osd_client *osdc,
31 struct ceph_osd_request *req);
2cc6128a
ID		 32static void __unregister_request(struct ceph_osd_client *osdc,
33 struct ceph_osd_request *req);
a40c4f10
YS		 34static void __unregister_linger_request(struct ceph_osd_client *osdc,
35 struct ceph_osd_request *req);
2cc6128a 36static void __enqueue_request(struct ceph_osd_request *req);
56e925b6
SW		 37static void __send_request(struct ceph_osd_client *osdc,
38 struct ceph_osd_request *req);
f24e9980
SW		 39
40/*
41 * Implement client access to distributed object storage cluster.
42 *
43 * All data objects are stored within a cluster/cloud of OSDs, or
44 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
45 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
46 * remote daemons serving up and coordinating consistent and safe
47 * access to storage.
48 *
49 * Cluster membership and the mapping of data objects onto storage devices
50 * are described by the osd map.
51 *
52 * We keep track of pending OSD requests (read, write), resubmit
53 * requests to different OSDs when the cluster topology/data layout
54 * change, or retry the affected requests when the communications
55 * channel with an OSD is reset.
56 */
57
58/*
59 * calculate the mapping of a file extent onto an object, and fill out the
60 * request accordingly. shorten extent as necessary if it crosses an
61 * object boundary.
62 *
63 * fill osd op in request message.
64 */
dbe0fc41 65static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 66 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 67{
60e56f13 68 u64 orig_len = *plen;
d63b77f4 69 int r;
f24e9980 70
60e56f13 71 /* object extent? */
75d1c941
AE		 72 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
73 objoff, objlen);
d63b77f4
SW		 74 if (r < 0)
75 return r;
75d1c941
AE		 76 if (*objlen < orig_len) {
77 *plen = *objlen;
60e56f13
AE		 78 dout(" skipping last %llu, final file extent %llu~%llu\n",
79 orig_len - *plen, off, *plen);
80 }
81
75d1c941 82 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
f24e9980 83
3ff5f385 84 return 0;
f24e9980
SW		 85}
86
c54d47bf
AE		 87static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
88{
89 memset(osd_data, 0, sizeof (*osd_data));
90 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
91}
92
a4ce40a9 93static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 94 struct page **pages, u64 length, u32 alignment,
95 bool pages_from_pool, bool own_pages)
96{
97 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
98 osd_data->pages = pages;
99 osd_data->length = length;
100 osd_data->alignment = alignment;
101 osd_data->pages_from_pool = pages_from_pool;
102 osd_data->own_pages = own_pages;
103}
43bfe5de 104
a4ce40a9 105static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 106 struct ceph_pagelist *pagelist)
107{
108 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
109 osd_data->pagelist = pagelist;
110}
43bfe5de
AE		 111
112#ifdef CONFIG_BLOCK
a4ce40a9 113static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
43bfe5de
AE		 114 struct bio *bio, size_t bio_length)
115{
116 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
117 osd_data->bio = bio;
118 osd_data->bio_length = bio_length;
119}
43bfe5de
AE		 120#endif /* CONFIG_BLOCK */
121
8a703a38
IC		 122#define osd_req_op_data(oreq, whch, typ, fld) \
123({ \
124 struct ceph_osd_request *__oreq = (oreq); \
125 unsigned int __whch = (whch); \
126 BUG_ON(__whch >= __oreq->r_num_ops); \
127 &__oreq->r_ops[__whch].typ.fld; \
128})
863c7eb5 129
49719778
AE		 130static struct ceph_osd_data *
131osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
132{
133 BUG_ON(which >= osd_req->r_num_ops);
134
135 return &osd_req->r_ops[which].raw_data_in;
136}
137
a4ce40a9
AE		 138struct ceph_osd_data *
139osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
406e2c9f 140 unsigned int which)
a4ce40a9 141{
863c7eb5 142 return osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 143}
144EXPORT_SYMBOL(osd_req_op_extent_osd_data);
145
49719778
AE		 146void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
147 unsigned int which, struct page **pages,
148 u64 length, u32 alignment,
149 bool pages_from_pool, bool own_pages)
150{
151 struct ceph_osd_data *osd_data;
152
153 osd_data = osd_req_op_raw_data_in(osd_req, which);
154 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
155 pages_from_pool, own_pages);
156}
157EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
158
a4ce40a9 159void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
406e2c9f
AE		 160 unsigned int which, struct page **pages,
161 u64 length, u32 alignment,
a4ce40a9
AE		 162 bool pages_from_pool, bool own_pages)
163{
164 struct ceph_osd_data *osd_data;
165
863c7eb5 166 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9
AE		 167 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
168 pages_from_pool, own_pages);
a4ce40a9
AE		 169}
170EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
171
172void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
406e2c9f 173 unsigned int which, struct ceph_pagelist *pagelist)
a4ce40a9
AE		 174{
175 struct ceph_osd_data *osd_data;
176
863c7eb5 177 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 178 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 179}
180EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
181
182#ifdef CONFIG_BLOCK
183void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
406e2c9f 184 unsigned int which, struct bio *bio, size_t bio_length)
a4ce40a9
AE		 185{
186 struct ceph_osd_data *osd_data;
863c7eb5
AE		 187
188 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
a4ce40a9 189 ceph_osd_data_bio_init(osd_data, bio, bio_length);
a4ce40a9
AE		 190}
191EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
192#endif /* CONFIG_BLOCK */
193
194static void osd_req_op_cls_request_info_pagelist(
195 struct ceph_osd_request *osd_req,
196 unsigned int which, struct ceph_pagelist *pagelist)
197{
198 struct ceph_osd_data *osd_data;
199
863c7eb5 200 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
a4ce40a9 201 ceph_osd_data_pagelist_init(osd_data, pagelist);
a4ce40a9
AE		 202}
203
04017e29
AE		 204void osd_req_op_cls_request_data_pagelist(
205 struct ceph_osd_request *osd_req,
206 unsigned int which, struct ceph_pagelist *pagelist)
207{
208 struct ceph_osd_data *osd_data;
209
863c7eb5 210 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
04017e29
AE		 211 ceph_osd_data_pagelist_init(osd_data, pagelist);
212}
213EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
214
6c57b554
AE		 215void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
216 unsigned int which, struct page **pages, u64 length,
217 u32 alignment, bool pages_from_pool, bool own_pages)
218{
219 struct ceph_osd_data *osd_data;
220
221 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
222 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
223 pages_from_pool, own_pages);
224}
225EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
226
a4ce40a9
AE		 227void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
228 unsigned int which, struct page **pages, u64 length,
229 u32 alignment, bool pages_from_pool, bool own_pages)
230{
231 struct ceph_osd_data *osd_data;
232
863c7eb5 233 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
a4ce40a9
AE		 234 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
235 pages_from_pool, own_pages);
a4ce40a9
AE		 236}
237EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
238
23c08a9c
AE		 239static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
240{
241 switch (osd_data->type) {
242 case CEPH_OSD_DATA_TYPE_NONE:
243 return 0;
244 case CEPH_OSD_DATA_TYPE_PAGES:
245 return osd_data->length;
246 case CEPH_OSD_DATA_TYPE_PAGELIST:
247 return (u64)osd_data->pagelist->length;
248#ifdef CONFIG_BLOCK
249 case CEPH_OSD_DATA_TYPE_BIO:
250 return (u64)osd_data->bio_length;
251#endif /* CONFIG_BLOCK */
252 default:
253 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
254 return 0;
255 }
256}
257
c54d47bf
AE		 258static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
259{
5476492f 260 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
c54d47bf
AE		 261 int num_pages;
262
263 num_pages = calc_pages_for((u64)osd_data->alignment,
264 (u64)osd_data->length);
265 ceph_release_page_vector(osd_data->pages, num_pages);
266 }
5476492f
AE		 267 ceph_osd_data_init(osd_data);
268}
269
270static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
271 unsigned int which)
272{
273 struct ceph_osd_req_op *op;
274
275 BUG_ON(which >= osd_req->r_num_ops);
276 op = &osd_req->r_ops[which];
277
278 switch (op->op) {
279 case CEPH_OSD_OP_READ:
280 case CEPH_OSD_OP_WRITE:
e30b7577 281 case CEPH_OSD_OP_WRITEFULL:
5476492f
AE		 282 ceph_osd_data_release(&op->extent.osd_data);
283 break;
284 case CEPH_OSD_OP_CALL:
285 ceph_osd_data_release(&op->cls.request_info);
04017e29 286 ceph_osd_data_release(&op->cls.request_data);
5476492f
AE		 287 ceph_osd_data_release(&op->cls.response_data);
288 break;
d74b50be
YZ		 289 case CEPH_OSD_OP_SETXATTR:
290 case CEPH_OSD_OP_CMPXATTR:
291 ceph_osd_data_release(&op->xattr.osd_data);
292 break;
66ba609f
YZ		 293 case CEPH_OSD_OP_STAT:
294 ceph_osd_data_release(&op->raw_data_in);
295 break;
5476492f
AE		 296 default:
297 break;
298 }
c54d47bf
AE		 299}
300
f24e9980
SW		 301/*
302 * requests
303 */
9e94af20 304static void ceph_osdc_release_request(struct kref *kref)
f24e9980 305{
9e94af20
ID		 306 struct ceph_osd_request *req = container_of(kref,
307 struct ceph_osd_request, r_kref);
5476492f 308 unsigned int which;
415e49a9 309
9e94af20
ID		 310 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
311 req->r_request, req->r_reply);
6562d661
ID		 312 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
313 WARN_ON(!list_empty(&req->r_req_lru_item));
314 WARN_ON(!list_empty(&req->r_osd_item));
315 WARN_ON(!list_empty(&req->r_linger_item));
316 WARN_ON(!list_empty(&req->r_linger_osd_item));
317 WARN_ON(req->r_osd);
9e94af20 318
415e49a9
SW		 319 if (req->r_request)
320 ceph_msg_put(req->r_request);
ace6d3a9 321 if (req->r_reply) {
8921d114 322 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 323 ceph_msg_put(req->r_reply);
ace6d3a9 324 }
0fff87ec 325
5476492f
AE		 326 for (which = 0; which < req->r_num_ops; which++)
327 osd_req_op_data_release(req, which);
0fff87ec 328
d30291b9
ID		 329 ceph_oid_destroy(&req->r_base_oid);
330 ceph_oid_destroy(&req->r_target_oid);
415e49a9 331 ceph_put_snap_context(req->r_snapc);
d30291b9 332
415e49a9
SW		 333 if (req->r_mempool)
334 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 335 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 336 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 337 else
338 kfree(req);
f24e9980 339}
9e94af20
ID		 340
341void ceph_osdc_get_request(struct ceph_osd_request *req)
342{
343 dout("%s %p (was %d)\n", __func__, req,
344 atomic_read(&req->r_kref.refcount));
345 kref_get(&req->r_kref);
346}
347EXPORT_SYMBOL(ceph_osdc_get_request);
348
349void ceph_osdc_put_request(struct ceph_osd_request *req)
350{
3ed97d63
ID		 351 if (req) {
352 dout("%s %p (was %d)\n", __func__, req,
353 atomic_read(&req->r_kref.refcount));
354 kref_put(&req->r_kref, ceph_osdc_release_request);
355 }
9e94af20
ID		 356}
357EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 358
3499e8a5 359struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 360 struct ceph_snap_context *snapc,
1b83bef2 361 unsigned int num_ops,
3499e8a5 362 bool use_mempool,
54a54007 363 gfp_t gfp_flags)
f24e9980
SW		 364{
365 struct ceph_osd_request *req;
1b83bef2 366
f24e9980 367 if (use_mempool) {
3f1af42a 368 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 369 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 370 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
371 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 372 } else {
3f1af42a
ID		 373 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
374 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
375 gfp_flags);
f24e9980 376 }
3f1af42a 377 if (unlikely(!req))
a79832f2 378 return NULL;
f24e9980 379
3f1af42a
ID		 380 /* req only, each op is zeroed in _osd_req_op_init() */
381 memset(req, 0, sizeof(*req));
382
f24e9980
SW		 383 req->r_osdc = osdc;
384 req->r_mempool = use_mempool;
79528734 385 req->r_num_ops = num_ops;
84127282
ID		 386 req->r_snapid = CEPH_NOSNAP;
387 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 388
415e49a9 389 kref_init(&req->r_kref);
f24e9980
SW		 390 init_completion(&req->r_completion);
391 init_completion(&req->r_safe_completion);
a978fa20 392 RB_CLEAR_NODE(&req->r_node);
f24e9980 393 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 394 INIT_LIST_HEAD(&req->r_linger_item);
1d0326b1 395 INIT_LIST_HEAD(&req->r_linger_osd_item);
935b639a 396 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 397 INIT_LIST_HEAD(&req->r_osd_item);
398
d30291b9 399 ceph_oid_init(&req->r_base_oid);
3c972c95 400 req->r_base_oloc.pool = -1;
d30291b9 401 ceph_oid_init(&req->r_target_oid);
205ee118 402 req->r_target_oloc.pool = -1;
22116525 403
13d1ad16
ID		 404 dout("%s req %p\n", __func__, req);
405 return req;
406}
407EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 408
13d1ad16
ID		 409int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
410{
411 struct ceph_osd_client *osdc = req->r_osdc;
412 struct ceph_msg *msg;
413 int msg_size;
c16e7869 414
d30291b9
ID		 415 WARN_ON(ceph_oid_empty(&req->r_base_oid));
416
13d1ad16 417 /* create request message */
ae458f5a
ID		 418 msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
419 msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
420 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
421 msg_size += 1 + 8 + 4 + 4; /* pgid */
13d1ad16
ID		 422 msg_size += 4 + req->r_base_oid.name_len; /* oid */
423 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 424 msg_size += 8; /* snapid */
425 msg_size += 8; /* snap_seq */
13d1ad16 426 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
ae458f5a
ID		 427 msg_size += 4; /* retry_attempt */
428
13d1ad16 429 if (req->r_mempool)
8f3bc053 430 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 431 else
13d1ad16
ID		 432 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
433 if (!msg)
434 return -ENOMEM;
68b4476b 435
f24e9980 436 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 437 req->r_request = msg;
3499e8a5 438
13d1ad16
ID		 439 /* create reply message */
440 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 441 msg_size += req->r_base_oid.name_len;
442 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 443
444 if (req->r_mempool)
445 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
446 else
447 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
448 if (!msg)
449 return -ENOMEM;
450
451 req->r_reply = msg;
452
453 return 0;
3499e8a5 454}
13d1ad16 455EXPORT_SYMBOL(ceph_osdc_alloc_messages);
3499e8a5 456
a8dd0a37 457static bool osd_req_opcode_valid(u16 opcode)
68b4476b 458{
a8dd0a37 459 switch (opcode) {
70b5bfa3
ID		 460#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
461__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
462#undef GENERATE_CASE
a8dd0a37
AE		 463 default:
464 return false;
465 }
466}
467
33803f33
AE		 468/*
469 * This is an osd op init function for opcodes that have no data or
470 * other information associated with them. It also serves as a
471 * common init routine for all the other init functions, below.
472 */
c99d2d4a 473static struct ceph_osd_req_op *
49719778 474_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 475 u16 opcode, u32 flags)
33803f33 476{
c99d2d4a
AE		 477 struct ceph_osd_req_op *op;
478
479 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 480 BUG_ON(!osd_req_opcode_valid(opcode));
481
c99d2d4a 482 op = &osd_req->r_ops[which];
33803f33 483 memset(op, 0, sizeof (*op));
33803f33 484 op->op = opcode;
144cba14 485 op->flags = flags;
c99d2d4a
AE		 486
487 return op;
33803f33
AE		 488}
489
49719778 490void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 491 unsigned int which, u16 opcode, u32 flags)
49719778 492{
144cba14 493 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 494}
495EXPORT_SYMBOL(osd_req_op_init);
496
c99d2d4a
AE		 497void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
498 unsigned int which, u16 opcode,
33803f33
AE		 499 u64 offset, u64 length,
500 u64 truncate_size, u32 truncate_seq)
501{
144cba14
YZ		 502 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
503 opcode, 0);
33803f33
AE		 504 size_t payload_len = 0;
505
ad7a60de 506 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 507 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
508 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 509
33803f33
AE		 510 op->extent.offset = offset;
511 op->extent.length = length;
512 op->extent.truncate_size = truncate_size;
513 op->extent.truncate_seq = truncate_seq;
e30b7577 514 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 515 payload_len += length;
516
de2aa102 517 op->indata_len = payload_len;
33803f33
AE		 518}
519EXPORT_SYMBOL(osd_req_op_extent_init);
520
c99d2d4a
AE		 521void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
522 unsigned int which, u64 length)
e5975c7c 523{
c99d2d4a
AE		 524 struct ceph_osd_req_op *op;
525 u64 previous;
526
527 BUG_ON(which >= osd_req->r_num_ops);
528 op = &osd_req->r_ops[which];
529 previous = op->extent.length;
e5975c7c
AE		 530
531 if (length == previous)
532 return; /* Nothing to do */
533 BUG_ON(length > previous);
534
535 op->extent.length = length;
de2aa102 536 op->indata_len -= previous - length;
e5975c7c
AE		 537}
538EXPORT_SYMBOL(osd_req_op_extent_update);
539
2c63f49a
YZ		 540void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
541 unsigned int which, u64 offset_inc)
542{
543 struct ceph_osd_req_op *op, *prev_op;
544
545 BUG_ON(which + 1 >= osd_req->r_num_ops);
546
547 prev_op = &osd_req->r_ops[which];
548 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
549 /* dup previous one */
550 op->indata_len = prev_op->indata_len;
551 op->outdata_len = prev_op->outdata_len;
552 op->extent = prev_op->extent;
553 /* adjust offset */
554 op->extent.offset += offset_inc;
555 op->extent.length -= offset_inc;
556
557 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
558 op->indata_len -= offset_inc;
559}
560EXPORT_SYMBOL(osd_req_op_extent_dup_last);
561
c99d2d4a 562void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 563 u16 opcode, const char *class, const char *method)
33803f33 564{
144cba14
YZ		 565 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
566 opcode, 0);
5f562df5 567 struct ceph_pagelist *pagelist;
33803f33
AE		 568 size_t payload_len = 0;
569 size_t size;
570
571 BUG_ON(opcode != CEPH_OSD_OP_CALL);
572
5f562df5
AE		 573 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
574 BUG_ON(!pagelist);
575 ceph_pagelist_init(pagelist);
576
33803f33
AE		 577 op->cls.class_name = class;
578 size = strlen(class);
579 BUG_ON(size > (size_t) U8_MAX);
580 op->cls.class_len = size;
5f562df5 581 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 582 payload_len += size;
583
584 op->cls.method_name = method;
585 size = strlen(method);
586 BUG_ON(size > (size_t) U8_MAX);
587 op->cls.method_len = size;
5f562df5 588 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 589 payload_len += size;
590
a4ce40a9 591 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 592
33803f33
AE		 593 op->cls.argc = 0; /* currently unused */
594
de2aa102 595 op->indata_len = payload_len;
33803f33
AE		 596}
597EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 598
d74b50be
YZ		 599int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
600 u16 opcode, const char *name, const void *value,
601 size_t size, u8 cmp_op, u8 cmp_mode)
602{
144cba14
YZ		 603 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
604 opcode, 0);
d74b50be
YZ		 605 struct ceph_pagelist *pagelist;
606 size_t payload_len;
607
608 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
609
610 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
611 if (!pagelist)
612 return -ENOMEM;
613
614 ceph_pagelist_init(pagelist);
615
616 payload_len = strlen(name);
617 op->xattr.name_len = payload_len;
618 ceph_pagelist_append(pagelist, name, payload_len);
619
620 op->xattr.value_len = size;
621 ceph_pagelist_append(pagelist, value, size);
622 payload_len += size;
623
624 op->xattr.cmp_op = cmp_op;
625 op->xattr.cmp_mode = cmp_mode;
626
627 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 628 op->indata_len = payload_len;
d74b50be
YZ		 629 return 0;
630}
631EXPORT_SYMBOL(osd_req_op_xattr_init);
632
c99d2d4a
AE		 633void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
634 unsigned int which, u16 opcode,
33803f33
AE		 635 u64 cookie, u64 version, int flag)
636{
144cba14
YZ		 637 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
638 opcode, 0);
33803f33 639
c99d2d4a 640 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 641
642 op->watch.cookie = cookie;
9ef1ee5a 643 op->watch.ver = version;
33803f33 644 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 645 op->watch.flag = (u8)1;
33803f33
AE		 646}
647EXPORT_SYMBOL(osd_req_op_watch_init);
648
c647b8a8
ID		 649void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
650 unsigned int which,
651 u64 expected_object_size,
652 u64 expected_write_size)
653{
654 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 655 CEPH_OSD_OP_SETALLOCHINT,
656 0);
c647b8a8
ID		 657
658 op->alloc_hint.expected_object_size = expected_object_size;
659 op->alloc_hint.expected_write_size = expected_write_size;
660
661 /*
662 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
663 * not worth a feature bit. Set FAILOK per-op flag to make
664 * sure older osds don't trip over an unsupported opcode.
665 */
666 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
667}
668EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
669
90af3602 670static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 671 struct ceph_osd_data *osd_data)
672{
673 u64 length = ceph_osd_data_length(osd_data);
674
675 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
676 BUG_ON(length > (u64) SIZE_MAX);
677 if (length)
90af3602 678 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 679 length, osd_data->alignment);
680 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
681 BUG_ON(!length);
90af3602 682 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 683#ifdef CONFIG_BLOCK
684 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 685 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 686#endif
687 } else {
688 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
689 }
690}
691
a8dd0a37 692static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 693 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 694{
79528734 695 struct ceph_osd_req_op *src;
04017e29 696 struct ceph_osd_data *osd_data;
54d50649 697 u64 request_data_len = 0;
04017e29 698 u64 data_length;
a8dd0a37 699
79528734
AE		 700 BUG_ON(which >= req->r_num_ops);
701 src = &req->r_ops[which];
a8dd0a37
AE		 702 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
703 pr_err("unrecognized osd opcode %d\n", src->op);
704
705 return 0;
706 }
707
708 switch (src->op) {
709 case CEPH_OSD_OP_STAT:
49719778
AE		 710 osd_data = &src->raw_data_in;
711 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 712 break;
713 case CEPH_OSD_OP_READ:
714 case CEPH_OSD_OP_WRITE:
e30b7577 715 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 716 case CEPH_OSD_OP_ZERO:
ad7a60de 717 case CEPH_OSD_OP_TRUNCATE:
e30b7577
ID		 718 if (src->op == CEPH_OSD_OP_WRITE ||
719 src->op == CEPH_OSD_OP_WRITEFULL)
54d50649 720 request_data_len = src->extent.length;
a8dd0a37
AE		 721 dst->extent.offset = cpu_to_le64(src->extent.offset);
722 dst->extent.length = cpu_to_le64(src->extent.length);
723 dst->extent.truncate_size =
724 cpu_to_le64(src->extent.truncate_size);
725 dst->extent.truncate_seq =
726 cpu_to_le32(src->extent.truncate_seq);
04017e29 727 osd_data = &src->extent.osd_data;
e30b7577
ID		 728 if (src->op == CEPH_OSD_OP_WRITE ||
729 src->op == CEPH_OSD_OP_WRITEFULL)
04017e29 730 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 731 else
04017e29 732 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 733 break;
734 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 735 dst->cls.class_len = src->cls.class_len;
736 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 737 osd_data = &src->cls.request_info;
738 ceph_osdc_msg_data_add(req->r_request, osd_data);
739 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
740 request_data_len = osd_data->pagelist->length;
741
742 osd_data = &src->cls.request_data;
743 data_length = ceph_osd_data_length(osd_data);
744 if (data_length) {
745 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
746 dst->cls.indata_len = cpu_to_le32(data_length);
747 ceph_osdc_msg_data_add(req->r_request, osd_data);
de2aa102 748 src->indata_len += data_length;
04017e29
AE		 749 request_data_len += data_length;
750 }
751 osd_data = &src->cls.response_data;
752 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 753 break;
754 case CEPH_OSD_OP_STARTSYNC:
755 break;
756 case CEPH_OSD_OP_NOTIFY_ACK:
757 case CEPH_OSD_OP_WATCH:
758 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
759 dst->watch.ver = cpu_to_le64(src->watch.ver);
760 dst->watch.flag = src->watch.flag;
761 break;
c647b8a8
ID		 762 case CEPH_OSD_OP_SETALLOCHINT:
763 dst->alloc_hint.expected_object_size =
764 cpu_to_le64(src->alloc_hint.expected_object_size);
765 dst->alloc_hint.expected_write_size =
766 cpu_to_le64(src->alloc_hint.expected_write_size);
767 break;
d74b50be
YZ		 768 case CEPH_OSD_OP_SETXATTR:
769 case CEPH_OSD_OP_CMPXATTR:
770 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
771 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
772 dst->xattr.cmp_op = src->xattr.cmp_op;
773 dst->xattr.cmp_mode = src->xattr.cmp_mode;
774 osd_data = &src->xattr.osd_data;
775 ceph_osdc_msg_data_add(req->r_request, osd_data);
776 request_data_len = osd_data->pagelist->length;
777 break;
864e9197
YZ		 778 case CEPH_OSD_OP_CREATE:
779 case CEPH_OSD_OP_DELETE:
780 break;
a8dd0a37 781 default:
4c46459c 782 pr_err("unsupported osd opcode %s\n",
8f63ca2d 783 ceph_osd_op_name(src->op));
4c46459c 784 WARN_ON(1);
a8dd0a37
AE		 785
786 return 0;
68b4476b 787 }
7b25bf5f 788
a8dd0a37 789 dst->op = cpu_to_le16(src->op);
7b25bf5f 790 dst->flags = cpu_to_le32(src->flags);
de2aa102 791 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 792
54d50649 793 return request_data_len;
68b4476b
YS		 794}
795
3499e8a5
YS		 796/*
797 * build new request AND message, calculate layout, and adjust file
798 * extent as needed.
799 *
800 * if the file was recently truncated, we include information about its
801 * old and new size so that the object can be updated appropriately. (we
802 * avoid synchronously deleting truncated objects because it's slow.)
803 *
804 * if @do_sync, include a 'startsync' command so that the osd will flush
805 * data quickly.
806 */
807struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
808 struct ceph_file_layout *layout,
809 struct ceph_vino vino,
715e4cd4
YZ		 810 u64 off, u64 *plen,
811 unsigned int which, int num_ops,
3499e8a5
YS		 812 int opcode, int flags,
813 struct ceph_snap_context *snapc,
3499e8a5
YS		 814 u32 truncate_seq,
815 u64 truncate_size,
153e5167 816 bool use_mempool)
3499e8a5 817{
68b4476b 818 struct ceph_osd_request *req;
75d1c941
AE		 819 u64 objnum = 0;
820 u64 objoff = 0;
821 u64 objlen = 0;
6816282d 822 int r;
68b4476b 823
ad7a60de 824 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 825 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
826 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 827
acead002 828 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 829 GFP_NOFS);
13d1ad16
ID		 830 if (!req) {
831 r = -ENOMEM;
832 goto fail;
833 }
79528734 834
d178a9e7 835 req->r_flags = flags;
3499e8a5
YS		 836
837 /* calculate max write size */
a19dadfb 838 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 839 if (r)
840 goto fail;
a19dadfb 841
864e9197 842 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 843 osd_req_op_init(req, which, opcode, 0);
864e9197
YZ		 844 } else {
845 u32 object_size = le32_to_cpu(layout->fl_object_size);
846 u32 object_base = off - objoff;
847 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
848 if (truncate_size <= object_base) {
849 truncate_size = 0;
850 } else {
851 truncate_size -= object_base;
852 if (truncate_size > object_size)
853 truncate_size = object_size;
854 }
ccca4e37 855 }
715e4cd4 856 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 857 truncate_size, truncate_seq);
858 }
d18d1e28 859
3c972c95 860 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
d30291b9 861 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
dbe0fc41 862
13d1ad16
ID		 863 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
864 if (r)
865 goto fail;
866
f24e9980 867 return req;
13d1ad16
ID		 868
869fail:
870 ceph_osdc_put_request(req);
871 return ERR_PTR(r);
f24e9980 872}
3d14c5d2 873EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 874
875/*
876 * We keep osd requests in an rbtree, sorted by ->r_tid.
877 */
fcd00b68 878DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
f24e9980
SW		 879
880static struct ceph_osd_request *
881__lookup_request_ge(struct ceph_osd_client *osdc,
882 u64 tid)
883{
884 struct ceph_osd_request *req;
885 struct rb_node *n = osdc->requests.rb_node;
886
887 while (n) {
888 req = rb_entry(n, struct ceph_osd_request, r_node);
889 if (tid < req->r_tid) {
890 if (!n->rb_left)
891 return req;
892 n = n->rb_left;
893 } else if (tid > req->r_tid) {
894 n = n->rb_right;
895 } else {
896 return req;
897 }
898 }
899 return NULL;
900}
901
2cc6128a
ID		 902static void __kick_linger_request(struct ceph_osd_request *req)
903{
904 struct ceph_osd_client *osdc = req->r_osdc;
905 struct ceph_osd *osd = req->r_osd;
906
907 /*
908 * Linger requests need to be resent with a new tid to avoid
909 * the dup op detection logic on the OSDs. Achieve this with
910 * a re-register dance instead of open-coding.
911 */
912 ceph_osdc_get_request(req);
913 if (!list_empty(&req->r_linger_item))
914 __unregister_linger_request(osdc, req);
915 else
916 __unregister_request(osdc, req);
917 __register_request(osdc, req);
918 ceph_osdc_put_request(req);
919
920 /*
921 * Unless request has been registered as both normal and
922 * lingering, __unregister{,_linger}_request clears r_osd.
923 * However, here we need to preserve r_osd to make sure we
924 * requeue on the same OSD.
925 */
926 WARN_ON(req->r_osd || !osd);
927 req->r_osd = osd;
928
929 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
930 __enqueue_request(req);
931}
932
6f6c7006
SW		 933/*
934 * Resubmit requests pending on the given osd.
935 */
936static void __kick_osd_requests(struct ceph_osd_client *osdc,
937 struct ceph_osd *osd)
938{
a40c4f10 939 struct ceph_osd_request *req, *nreq;
e02493c0 940 LIST_HEAD(resend);
2cc6128a 941 LIST_HEAD(resend_linger);
6f6c7006
SW		 942 int err;
943
2cc6128a 944 dout("%s osd%d\n", __func__, osd->o_osd);
6f6c7006 945 err = __reset_osd(osdc, osd);
685a7555 946 if (err)
6f6c7006 947 return;
2cc6128a 948
e02493c0
AE		 949 /*
950 * Build up a list of requests to resend by traversing the
951 * osd's list of requests. Requests for a given object are
952 * sent in tid order, and that is also the order they're
953 * kept on this list. Therefore all requests that are in
954 * flight will be found first, followed by all requests that
955 * have not yet been sent. And to resend requests while
956 * preserving this order we will want to put any sent
957 * requests back on the front of the osd client's unsent
958 * list.
959 *
960 * So we build a separate ordered list of already-sent
961 * requests for the affected osd and splice it onto the
962 * front of the osd client's unsent list. Once we've seen a
963 * request that has not yet been sent we're done. Those
964 * requests are already sitting right where they belong.
965 */
6f6c7006 966 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 967 if (!req->r_sent)
968 break;
2cc6128a
ID		 969
970 if (!req->r_linger) {
971 dout("%s requeueing %p tid %llu\n", __func__, req,
972 req->r_tid);
973 list_move_tail(&req->r_req_lru_item, &resend);
a40c4f10 974 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2cc6128a
ID		 975 } else {
976 list_move_tail(&req->r_req_lru_item, &resend_linger);
977 }
a40c4f10 978 }
e02493c0 979 list_splice(&resend, &osdc->req_unsent);
a40c4f10 980
e02493c0 981 /*
2cc6128a
ID		 982 * Both registered and not yet registered linger requests are
983 * enqueued with a new tid on the same OSD. We add/move them
984 * to req_unsent/o_requests at the end to keep things in tid
985 * order.
e02493c0 986 */
a40c4f10 987 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1d0326b1 988 r_linger_osd_item) {
2cc6128a
ID		 989 WARN_ON(!list_empty(&req->r_req_lru_item));
990 __kick_linger_request(req);
6f6c7006 991 }
2cc6128a
ID		 992
993 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
994 __kick_linger_request(req);
6f6c7006
SW		 995}
996
f24e9980 997/*
81b024e7 998 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 999 */
1000static void osd_reset(struct ceph_connection *con)
1001{
1002 struct ceph_osd *osd = con->private;
1003 struct ceph_osd_client *osdc;
1004
1005 if (!osd)
1006 return;
1007 dout("osd_reset osd%d\n", osd->o_osd);
1008 osdc = osd->o_osdc;
f24e9980 1009 down_read(&osdc->map_sem);
83aff95e
SW		 1010 mutex_lock(&osdc->request_mutex);
1011 __kick_osd_requests(osdc, osd);
f9d25199 1012 __send_queued(osdc);
83aff95e 1013 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1014 up_read(&osdc->map_sem);
1015}
1016
1017/*
1018 * Track open sessions with osds.
1019 */
e10006f8 1020static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1021{
1022 struct ceph_osd *osd;
1023
1024 osd = kzalloc(sizeof(*osd), GFP_NOFS);
1025 if (!osd)
1026 return NULL;
1027
1028 atomic_set(&osd->o_ref, 1);
1029 osd->o_osdc = osdc;
e10006f8 1030 osd->o_osd = onum;
f407731d 1031 RB_CLEAR_NODE(&osd->o_node);
f24e9980 1032 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 1033 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 1034 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 1035 osd->o_incarnation = 1;
1036
b7a9e5dd 1037 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1038
422d2cb8 1039 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 1040 return osd;
1041}
1042
1043static struct ceph_osd *get_osd(struct ceph_osd *osd)
1044{
1045 if (atomic_inc_not_zero(&osd->o_ref)) {
1046 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1047 atomic_read(&osd->o_ref));
1048 return osd;
1049 } else {
1050 dout("get_osd %p FAIL\n", osd);
1051 return NULL;
1052 }
1053}
1054
1055static void put_osd(struct ceph_osd *osd)
1056{
1057 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1058 atomic_read(&osd->o_ref) - 1);
b28ec2f3 1059 if (atomic_dec_and_test(&osd->o_ref)) {
b28ec2f3 1060 if (osd->o_auth.authorizer)
6c1ea260 1061 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
f24e9980 1062 kfree(osd);
79494d1b 1063 }
f24e9980
SW		 1064}
1065
fcd00b68
ID		 1066DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1067
f24e9980
SW		 1068/*
1069 * remove an osd from our map
1070 */
f5a2041b 1071static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1072{
7eb71e03 1073 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
cc9f1f51
ID		 1074 WARN_ON(!list_empty(&osd->o_requests));
1075 WARN_ON(!list_empty(&osd->o_linger_requests));
7c6e6fc5 1076
f5a2041b 1077 list_del_init(&osd->o_osd_lru);
fcd00b68 1078 erase_osd(&osdc->osds, osd);
7eb71e03
ID		 1079}
1080
1081static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1082{
1083 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1084
1085 if (!RB_EMPTY_NODE(&osd->o_node)) {
1086 ceph_con_close(&osd->o_con);
1087 __remove_osd(osdc, osd);
1088 put_osd(osd);
1089 }
f24e9980
SW		 1090}
1091
f5a2041b
YS		 1092static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1093 struct ceph_osd *osd)
1094{
bbf37ec3 1095 dout("%s %p\n", __func__, osd);
f5a2041b 1096 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1097
f5a2041b 1098 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
a319bf56 1099 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1100}
1101
bbf37ec3
ID		 1102static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1103 struct ceph_osd *osd)
1104{
1105 dout("%s %p\n", __func__, osd);
1106
1107 if (list_empty(&osd->o_requests) &&
1108 list_empty(&osd->o_linger_requests))
1109 __move_osd_to_lru(osdc, osd);
1110}
1111
f5a2041b
YS		 1112static void __remove_osd_from_lru(struct ceph_osd *osd)
1113{
1114 dout("__remove_osd_from_lru %p\n", osd);
1115 if (!list_empty(&osd->o_osd_lru))
1116 list_del_init(&osd->o_osd_lru);
1117}
1118
f24e9980
SW		 1119/*
1120 * reset osd connect
1121 */
f5a2041b 1122static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1123{
c3acb181 1124 struct ceph_entity_addr *peer_addr;
f24e9980 1125
f5a2041b 1126 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1127 if (list_empty(&osd->o_requests) &&
1128 list_empty(&osd->o_linger_requests)) {
7eb71e03 1129 remove_osd(osdc, osd);
c3acb181
AE		 1130 return -ENODEV;
1131 }
1132
1133 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1134 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1135 !ceph_con_opened(&osd->o_con)) {
1136 struct ceph_osd_request *req;
1137
0b4af2e8
ID		 1138 dout("osd addr hasn't changed and connection never opened, "
1139 "letting msgr retry\n");
87b315a5
SW		 1140 /* touch each r_stamp for handle_timeout()'s benfit */
1141 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1142 req->r_stamp = jiffies;
c3acb181
AE		 1143
1144 return -EAGAIN;
f24e9980 1145 }
c3acb181
AE		 1146
1147 ceph_con_close(&osd->o_con);
1148 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1149 osd->o_incarnation++;
1150
1151 return 0;
f24e9980
SW		 1152}
1153
422d2cb8
YS		 1154static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1155{
1156 schedule_delayed_work(&osdc->timeout_work,
a319bf56 1157 osdc->client->options->osd_keepalive_timeout);
422d2cb8
YS		 1158}
1159
1160static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1161{
1162 cancel_delayed_work(&osdc->timeout_work);
1163}
f24e9980
SW		 1164
1165/*
1166 * Register request, assign tid. If this is the first request, set up
1167 * the timeout event.
1168 */
a40c4f10
YS		 1169static void __register_request(struct ceph_osd_client *osdc,
1170 struct ceph_osd_request *req)
f24e9980 1171{
f24e9980 1172 req->r_tid = ++osdc->last_tid;
6df058c0 1173 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1174 dout("__register_request %p tid %lld\n", req, req->r_tid);
fcd00b68 1175 insert_request(&osdc->requests, req);
f24e9980
SW		 1176 ceph_osdc_get_request(req);
1177 osdc->num_requests++;
f24e9980 1178 if (osdc->num_requests == 1) {
422d2cb8
YS		 1179 dout(" first request, scheduling timeout\n");
1180 __schedule_osd_timeout(osdc);
f24e9980 1181 }
a40c4f10
YS		 1182}
1183
f24e9980
SW		 1184/*
1185 * called under osdc->request_mutex
1186 */
1187static void __unregister_request(struct ceph_osd_client *osdc,
1188 struct ceph_osd_request *req)
1189{
35f9f8a0
SW		 1190 if (RB_EMPTY_NODE(&req->r_node)) {
1191 dout("__unregister_request %p tid %lld not registered\n",
1192 req, req->r_tid);
1193 return;
1194 }
1195
f24e9980 1196 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
fcd00b68 1197 erase_request(&osdc->requests, req);
f24e9980
SW		 1198 osdc->num_requests--;
1199
0ba6478d
SW		 1200 if (req->r_osd) {
1201 /* make sure the original request isn't in flight. */
6740a845 1202 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1203
1204 list_del_init(&req->r_osd_item);
bbf37ec3 1205 maybe_move_osd_to_lru(osdc, req->r_osd);
4f23409e 1206 if (list_empty(&req->r_linger_osd_item))
a40c4f10 1207 req->r_osd = NULL;
0ba6478d 1208 }
f24e9980 1209
7d5f2481 1210 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1211 ceph_osdc_put_request(req);
1212
422d2cb8
YS		 1213 if (osdc->num_requests == 0) {
1214 dout(" no requests, canceling timeout\n");
1215 __cancel_osd_timeout(osdc);
f24e9980
SW		 1216 }
1217}
1218
1219/*
1220 * Cancel a previously queued request message
1221 */
1222static void __cancel_request(struct ceph_osd_request *req)
1223{
6bc18876 1224 if (req->r_sent && req->r_osd) {
6740a845 1225 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1226 req->r_sent = 0;
1227 }
1228}
1229
a40c4f10
YS		 1230static void __register_linger_request(struct ceph_osd_client *osdc,
1231 struct ceph_osd_request *req)
1232{
af593064
ID		 1233 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1234 WARN_ON(!req->r_linger);
1235
96e4dac6 1236 ceph_osdc_get_request(req);
a40c4f10 1237 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89 1238 if (req->r_osd)
1d0326b1 1239 list_add_tail(&req->r_linger_osd_item,
6194ea89 1240 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1241}
1242
1243static void __unregister_linger_request(struct ceph_osd_client *osdc,
1244 struct ceph_osd_request *req)
1245{
af593064
ID		 1246 WARN_ON(!req->r_linger);
1247
1248 if (list_empty(&req->r_linger_item)) {
1249 dout("%s %p tid %llu not registered\n", __func__, req,
1250 req->r_tid);
1251 return;
1252 }
1253
1254 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
61c74035 1255 list_del_init(&req->r_linger_item);
af593064 1256
a40c4f10 1257 if (req->r_osd) {
1d0326b1 1258 list_del_init(&req->r_linger_osd_item);
bbf37ec3 1259 maybe_move_osd_to_lru(osdc, req->r_osd);
fbdb9190
SW		 1260 if (list_empty(&req->r_osd_item))
1261 req->r_osd = NULL;
a40c4f10 1262 }
96e4dac6 1263 ceph_osdc_put_request(req);
a40c4f10
YS		 1264}
1265
a40c4f10
YS		 1266void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1267 struct ceph_osd_request *req)
1268{
1269 if (!req->r_linger) {
1270 dout("set_request_linger %p\n", req);
1271 req->r_linger = 1;
a40c4f10
YS		 1272 }
1273}
1274EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1275
d29adb34
JD		 1276/*
1277 * Returns whether a request should be blocked from being sent
1278 * based on the current osdmap and osd_client settings.
1279 *
1280 * Caller should hold map_sem for read.
1281 */
1282static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1283 struct ceph_osd_request *req)
1284{
1285 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1286 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1287 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1288 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1289 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1290}
1291
17a13e40
ID		 1292/*
1293 * Calculate mapping of a request to a PG. Takes tiering into account.
1294 */
1295static int __calc_request_pg(struct ceph_osdmap *osdmap,
1296 struct ceph_osd_request *req,
1297 struct ceph_pg *pg_out)
1298{
205ee118
ID		 1299 bool need_check_tiering;
1300
1301 need_check_tiering = false;
1302 if (req->r_target_oloc.pool == -1) {
1303 req->r_target_oloc = req->r_base_oloc; /* struct */
1304 need_check_tiering = true;
1305 }
d30291b9 1306 if (ceph_oid_empty(&req->r_target_oid)) {
205ee118
ID		 1307 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1308 need_check_tiering = true;
1309 }
1310
1311 if (need_check_tiering &&
1312 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
17a13e40
ID		 1313 struct ceph_pg_pool_info *pi;
1314
205ee118 1315 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
17a13e40
ID		 1316 if (pi) {
1317 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1318 pi->read_tier >= 0)
205ee118 1319 req->r_target_oloc.pool = pi->read_tier;
17a13e40
ID		 1320 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1321 pi->write_tier >= 0)
205ee118 1322 req->r_target_oloc.pool = pi->write_tier;
17a13e40
ID		 1323 }
1324 /* !pi is caught in ceph_oloc_oid_to_pg() */
1325 }
1326
d9591f5e
ID		 1327 return ceph_object_locator_to_pg(osdmap, &req->r_target_oid,
1328 &req->r_target_oloc, pg_out);
17a13e40
ID		 1329}
1330
f671b581
ID		 1331static void __enqueue_request(struct ceph_osd_request *req)
1332{
1333 struct ceph_osd_client *osdc = req->r_osdc;
1334
1335 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1336 req->r_osd ? req->r_osd->o_osd : -1);
1337
1338 if (req->r_osd) {
1339 __remove_osd_from_lru(req->r_osd);
1340 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1341 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1342 } else {
1343 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1344 }
1345}
1346
f24e9980
SW		 1347/*
1348 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1349 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1350 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1351 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1352 *
1353 * Return 0 if unchanged, 1 if changed, or negative on error.
1354 *
1355 * Caller should hold map_sem for read and request_mutex.
1356 */
6f6c7006 1357static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1358 struct ceph_osd_request *req, int force_resend)
f24e9980 1359{
5b191d99 1360 struct ceph_pg pgid;
6f3bfd45 1361 struct ceph_osds up, acting;
f24e9980 1362 int err;
d29adb34 1363 bool was_paused;
f24e9980 1364
6f6c7006 1365 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40
ID		 1366
1367 err = __calc_request_pg(osdc->osdmap, req, &pgid);
6f6c7006
SW		 1368 if (err) {
1369 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1370 return err;
6f6c7006 1371 }
7740a42f
SW		 1372 req->r_pgid = pgid;
1373
6f3bfd45 1374 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
f24e9980 1375
d29adb34
JD		 1376 was_paused = req->r_paused;
1377 req->r_paused = __req_should_be_paused(osdc, req);
1378 if (was_paused && !req->r_paused)
1379 force_resend = 1;
1380
38d6453c 1381 if ((!force_resend &&
6f3bfd45 1382 req->r_osd && req->r_osd->o_osd == acting.primary &&
d85b7056 1383 req->r_sent >= req->r_osd->o_incarnation &&
6f3bfd45
ID		 1384 req->r_num_pg_osds == acting.size &&
1385 memcmp(req->r_pg_osds, acting.osds,
1386 acting.size * sizeof(acting.osds[0])) == 0) ||
1387 (req->r_osd == NULL && acting.primary == -1) ||
d29adb34 1388 req->r_paused)
f24e9980
SW		 1389 return 0; /* no change */
1390
5b191d99 1391 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
6f3bfd45 1392 req->r_tid, pgid.pool, pgid.seed, acting.primary,
f24e9980
SW		 1393 req->r_osd ? req->r_osd->o_osd : -1);
1394
d85b7056 1395 /* record full pg acting set */
6f3bfd45
ID		 1396 memcpy(req->r_pg_osds, acting.osds,
1397 acting.size * sizeof(acting.osds[0]));
1398 req->r_num_pg_osds = acting.size;
d85b7056 1399
f24e9980
SW		 1400 if (req->r_osd) {
1401 __cancel_request(req);
1402 list_del_init(&req->r_osd_item);
a390de02 1403 list_del_init(&req->r_linger_osd_item);
f24e9980
SW		 1404 req->r_osd = NULL;
1405 }
1406
6f3bfd45
ID		 1407 req->r_osd = lookup_osd(&osdc->osds, acting.primary);
1408 if (!req->r_osd && acting.primary >= 0) {
c99eb1c7 1409 err = -ENOMEM;
6f3bfd45 1410 req->r_osd = create_osd(osdc, acting.primary);
6f6c7006
SW		 1411 if (!req->r_osd) {
1412 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1413 goto out;
6f6c7006 1414 }
f24e9980 1415
6f3bfd45
ID		 1416 dout("map_request osd %p is osd%d\n", req->r_osd,
1417 acting.primary);
fcd00b68 1418 insert_osd(&osdc->osds, req->r_osd);
f24e9980 1419
b7a9e5dd 1420 ceph_con_open(&req->r_osd->o_con,
6f3bfd45
ID		 1421 CEPH_ENTITY_TYPE_OSD, acting.primary,
1422 &osdc->osdmap->osd_addr[acting.primary]);
f24e9980
SW		 1423 }
1424
f671b581 1425 __enqueue_request(req);
d85b7056 1426 err = 1; /* osd or pg changed */
f24e9980
SW		 1427
1428out:
f24e9980
SW		 1429 return err;
1430}
1431
1432/*
1433 * caller should hold map_sem (for read) and request_mutex
1434 */
56e925b6
SW		 1435static void __send_request(struct ceph_osd_client *osdc,
1436 struct ceph_osd_request *req)
f24e9980 1437{
1b83bef2 1438 void *p;
f24e9980 1439
1b83bef2
SW		 1440 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1441 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1442 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1443
1444 /* fill in message content that changes each time we send it */
1445 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1446 put_unaligned_le32(req->r_flags, req->r_request_flags);
205ee118 1447 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1b83bef2
SW		 1448 p = req->r_request_pgid;
1449 ceph_encode_64(&p, req->r_pgid.pool);
1450 ceph_encode_32(&p, req->r_pgid.seed);
1451 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1452 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1453 sizeof(req->r_reassert_version));
2169aea6 1454
3dd72fc0 1455 req->r_stamp = jiffies;
07a27e22 1456 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1457
1458 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1459
f24e9980 1460 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1461
1462 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1463}
1464
6f6c7006
SW		 1465/*
1466 * Send any requests in the queue (req_unsent).
1467 */
f9d25199 1468static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1469{
1470 struct ceph_osd_request *req, *tmp;
1471
f9d25199
AE		 1472 dout("__send_queued\n");
1473 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1474 __send_request(osdc, req);
6f6c7006
SW		 1475}
1476
0bbfdfe8
ID		 1477/*
1478 * Caller should hold map_sem for read and request_mutex.
1479 */
1480static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1481 struct ceph_osd_request *req,
1482 bool nofail)
1483{
1484 int rc;
1485
1486 __register_request(osdc, req);
1487 req->r_sent = 0;
1488 req->r_got_reply = 0;
1489 rc = __map_request(osdc, req, 0);
1490 if (rc < 0) {
1491 if (nofail) {
1492 dout("osdc_start_request failed map, "
1493 " will retry %lld\n", req->r_tid);
1494 rc = 0;
1495 } else {
1496 __unregister_request(osdc, req);
1497 }
1498 return rc;
1499 }
1500
1501 if (req->r_osd == NULL) {
1502 dout("send_request %p no up osds in pg\n", req);
1503 ceph_monc_request_next_osdmap(&osdc->client->monc);
1504 } else {
1505 __send_queued(osdc);
1506 }
1507
1508 return 0;
1509}
1510
f24e9980
SW		 1511/*
1512 * Timeout callback, called every N seconds when 1 or more osd
1513 * requests has been active for more than N seconds. When this
1514 * happens, we ping all OSDs with requests who have timed out to
1515 * ensure any communications channel reset is detected. Reset the
1516 * request timeouts another N seconds in the future as we go.
1517 * Reschedule the timeout event another N seconds in future (unless
1518 * there are no open requests).
1519 */
1520static void handle_timeout(struct work_struct *work)
1521{
1522 struct ceph_osd_client *osdc =
1523 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 1524 struct ceph_options *opts = osdc->client->options;
83aff95e 1525 struct ceph_osd_request *req;
f24e9980 1526 struct ceph_osd *osd;
422d2cb8 1527 struct list_head slow_osds;
f24e9980
SW		 1528 dout("timeout\n");
1529 down_read(&osdc->map_sem);
1530
1531 ceph_monc_request_next_osdmap(&osdc->client->monc);
1532
1533 mutex_lock(&osdc->request_mutex);
f24e9980 1534
422d2cb8
YS		 1535 /*
1536 * ping osds that are a bit slow. this ensures that if there
1537 * is a break in the TCP connection we will notice, and reopen
1538 * a connection with that osd (from the fault callback).
1539 */
1540 INIT_LIST_HEAD(&slow_osds);
1541 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
a319bf56
ID		 1542 if (time_before(jiffies,
1543 req->r_stamp + opts->osd_keepalive_timeout))
422d2cb8
YS		 1544 break;
1545
1546 osd = req->r_osd;
1547 BUG_ON(!osd);
1548 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1549 req->r_tid, osd->o_osd);
422d2cb8
YS		 1550 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1551 }
1552 while (!list_empty(&slow_osds)) {
1553 osd = list_entry(slow_osds.next, struct ceph_osd,
1554 o_keepalive_item);
1555 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1556 ceph_con_keepalive(&osd->o_con);
1557 }
1558
422d2cb8 1559 __schedule_osd_timeout(osdc);
f9d25199 1560 __send_queued(osdc);
f24e9980 1561 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1562 up_read(&osdc->map_sem);
1563}
1564
f5a2041b
YS		 1565static void handle_osds_timeout(struct work_struct *work)
1566{
1567 struct ceph_osd_client *osdc =
1568 container_of(work, struct ceph_osd_client,
1569 osds_timeout_work.work);
a319bf56 1570 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 1571 struct ceph_osd *osd, *nosd;
f5a2041b 1572
42a2c09f 1573 dout("%s osdc %p\n", __func__, osdc);
f5a2041b 1574 down_read(&osdc->map_sem);
42a2c09f
ID		 1575 mutex_lock(&osdc->request_mutex);
1576
1577 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1578 if (time_before(jiffies, osd->lru_ttl))
1579 break;
1580
1581 remove_osd(osdc, osd);
1582 }
f5a2041b 1583
42a2c09f
ID		 1584 mutex_unlock(&osdc->request_mutex);
1585 up_read(&osdc->map_sem);
f5a2041b
YS		 1586 schedule_delayed_work(&osdc->osds_timeout_work,
1587 round_jiffies_relative(delay));
1588}
1589
205ee118
ID		 1590static int ceph_oloc_decode(void **p, void *end,
1591 struct ceph_object_locator *oloc)
1592{
1593 u8 struct_v, struct_cv;
1594 u32 len;
1595 void *struct_end;
1596 int ret = 0;
1597
1598 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1599 struct_v = ceph_decode_8(p);
1600 struct_cv = ceph_decode_8(p);
1601 if (struct_v < 3) {
1602 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1603 struct_v, struct_cv);
1604 goto e_inval;
1605 }
1606 if (struct_cv > 6) {
1607 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1608 struct_v, struct_cv);
1609 goto e_inval;
1610 }
1611 len = ceph_decode_32(p);
1612 ceph_decode_need(p, end, len, e_inval);
1613 struct_end = *p + len;
1614
1615 oloc->pool = ceph_decode_64(p);
1616 *p += 4; /* skip preferred */
1617
1618 len = ceph_decode_32(p);
1619 if (len > 0) {
1620 pr_warn("ceph_object_locator::key is set\n");
1621 goto e_inval;
1622 }
1623
1624 if (struct_v >= 5) {
1625 len = ceph_decode_32(p);
1626 if (len > 0) {
1627 pr_warn("ceph_object_locator::nspace is set\n");
1628 goto e_inval;
1629 }
1630 }
1631
1632 if (struct_v >= 6) {
1633 s64 hash = ceph_decode_64(p);
1634 if (hash != -1) {
1635 pr_warn("ceph_object_locator::hash is set\n");
1636 goto e_inval;
1637 }
1638 }
1639
1640 /* skip the rest */
1641 *p = struct_end;
1642out:
1643 return ret;
1644
1645e_inval:
1646 ret = -EINVAL;
1647 goto out;
1648}
1649
1650static int ceph_redirect_decode(void **p, void *end,
1651 struct ceph_request_redirect *redir)
1652{
1653 u8 struct_v, struct_cv;
1654 u32 len;
1655 void *struct_end;
1656 int ret;
1657
1658 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1659 struct_v = ceph_decode_8(p);
1660 struct_cv = ceph_decode_8(p);
1661 if (struct_cv > 1) {
1662 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1663 struct_v, struct_cv);
1664 goto e_inval;
1665 }
1666 len = ceph_decode_32(p);
1667 ceph_decode_need(p, end, len, e_inval);
1668 struct_end = *p + len;
1669
1670 ret = ceph_oloc_decode(p, end, &redir->oloc);
1671 if (ret)
1672 goto out;
1673
1674 len = ceph_decode_32(p);
1675 if (len > 0) {
1676 pr_warn("ceph_request_redirect::object_name is set\n");
1677 goto e_inval;
1678 }
1679
1680 len = ceph_decode_32(p);
1681 *p += len; /* skip osd_instructions */
1682
1683 /* skip the rest */
1684 *p = struct_end;
1685out:
1686 return ret;
1687
1688e_inval:
1689 ret = -EINVAL;
1690 goto out;
1691}
1692
25845472
SW		 1693static void complete_request(struct ceph_osd_request *req)
1694{
25845472
SW		 1695 complete_all(&req->r_safe_completion); /* fsync waiter */
1696}
1697
f24e9980
SW		 1698/*
1699 * handle osd op reply. either call the callback if it is specified,
1700 * or do the completion to wake up the waiting thread.
1701 */
70cf052d 1702static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg)
f24e9980 1703{
1b83bef2 1704 void *p, *end;
f24e9980 1705 struct ceph_osd_request *req;
205ee118 1706 struct ceph_request_redirect redir;
f24e9980 1707 u64 tid;
1b83bef2 1708 int object_len;
79528734
AE		 1709 unsigned int numops;
1710 int payload_len, flags;
0ceed5db 1711 s32 result;
1b83bef2
SW		 1712 s32 retry_attempt;
1713 struct ceph_pg pg;
1714 int err;
1715 u32 reassert_epoch;
1716 u64 reassert_version;
1717 u32 osdmap_epoch;
0d5af164 1718 int already_completed;
9fc6e064 1719 u32 bytes;
b0b31a8f 1720 u8 decode_redir;
79528734 1721 unsigned int i;
f24e9980 1722
6df058c0 1723 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1724 dout("handle_reply %p tid %llu\n", msg, tid);
1725
1726 p = msg->front.iov_base;
1727 end = p + msg->front.iov_len;
1728
1729 ceph_decode_need(&p, end, 4, bad);
1730 object_len = ceph_decode_32(&p);
1731 ceph_decode_need(&p, end, object_len, bad);
1732 p += object_len;
1733
ef4859d6 1734 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1735 if (err)
f24e9980 1736 goto bad;
1b83bef2
SW		 1737
1738 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1739 flags = ceph_decode_64(&p);
1740 result = ceph_decode_32(&p);
1741 reassert_epoch = ceph_decode_32(&p);
1742 reassert_version = ceph_decode_64(&p);
1743 osdmap_epoch = ceph_decode_32(&p);
1744
f24e9980 1745 /* lookup */
ff513ace 1746 down_read(&osdc->map_sem);
f24e9980 1747 mutex_lock(&osdc->request_mutex);
fcd00b68 1748 req = lookup_request(&osdc->requests, tid);
f24e9980
SW		 1749 if (req == NULL) {
1750 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1751 goto bad_mutex;
f24e9980
SW		 1752 }
1753 ceph_osdc_get_request(req);
1b83bef2
SW		 1754
1755 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1756 req, result);
1757
18741196 1758 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2 1759 numops = ceph_decode_32(&p);
3f1af42a 1760 if (numops > CEPH_OSD_MAX_OPS)
1b83bef2
SW		 1761 goto bad_put;
1762 if (numops != req->r_num_ops)
1763 goto bad_put;
1764 payload_len = 0;
18741196 1765 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1766 for (i = 0; i < numops; i++) {
1767 struct ceph_osd_op *op = p;
1768 int len;
1769
1770 len = le32_to_cpu(op->payload_len);
7665d85b 1771 req->r_ops[i].outdata_len = len;
1b83bef2
SW		 1772 dout(" op %d has %d bytes\n", i, len);
1773 payload_len += len;
1774 p += sizeof(*op);
1775 }
9fc6e064
AE		 1776 bytes = le32_to_cpu(msg->hdr.data_len);
1777 if (payload_len != bytes) {
b9a67899
JP		 1778 pr_warn("sum of op payload lens %d != data_len %d\n",
1779 payload_len, bytes);
1b83bef2
SW		 1780 goto bad_put;
1781 }
1782
18741196 1783 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1784 retry_attempt = ceph_decode_32(&p);
1785 for (i = 0; i < numops; i++)
7665d85b 1786 req->r_ops[i].rval = ceph_decode_32(&p);
f24e9980 1787
205ee118
ID		 1788 if (le16_to_cpu(msg->hdr.version) >= 6) {
1789 p += 8 + 4; /* skip replay_version */
1790 p += 8; /* skip user_version */
eb845ff1 1791
b0b31a8f
ID		 1792 if (le16_to_cpu(msg->hdr.version) >= 7)
1793 ceph_decode_8_safe(&p, end, decode_redir, bad_put);
1794 else
1795 decode_redir = 1;
1796 } else {
1797 decode_redir = 0;
1798 }
1799
1800 if (decode_redir) {
205ee118
ID		 1801 err = ceph_redirect_decode(&p, end, &redir);
1802 if (err)
1803 goto bad_put;
1804 } else {
1805 redir.oloc.pool = -1;
1806 }
f24e9980 1807
205ee118
ID		 1808 if (redir.oloc.pool != -1) {
1809 dout("redirect pool %lld\n", redir.oloc.pool);
1810
1811 __unregister_request(osdc, req);
205ee118
ID		 1812
1813 req->r_target_oloc = redir.oloc; /* struct */
1814
1815 /*
1816 * Start redirect requests with nofail=true. If
1817 * mapping fails, request will end up on the notarget
1818 * list, waiting for the new osdmap (which can take
1819 * a while), even though the original request mapped
1820 * successfully. In the future we might want to follow
1821 * original request's nofail setting here.
1822 */
ff513ace 1823 err = __ceph_osdc_start_request(osdc, req, true);
205ee118
ID		 1824 BUG_ON(err);
1825
ff513ace 1826 goto out_unlock;
205ee118
ID		 1827 }
1828
1829 already_completed = req->r_got_reply;
1830 if (!req->r_got_reply) {
1b83bef2 1831 req->r_result = result;
f24e9980
SW		 1832 dout("handle_reply result %d bytes %d\n", req->r_result,
1833 bytes);
1834 if (req->r_result == 0)
1835 req->r_result = bytes;
1836
1837 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1838 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1839 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1840
1841 req->r_got_reply = 1;
1842 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1843 dout("handle_reply tid %llu dup ack\n", tid);
ff513ace 1844 goto out_unlock;
f24e9980
SW		 1845 }
1846
1847 dout("handle_reply tid %llu flags %d\n", tid, flags);
1848
a40c4f10
YS		 1849 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1850 __register_linger_request(osdc, req);
1851
f24e9980 1852 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1853 if (result < 0 ||
1854 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1855 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1856 __unregister_request(osdc, req);
1857
1858 mutex_unlock(&osdc->request_mutex);
ff513ace 1859 up_read(&osdc->map_sem);
f24e9980 1860
eb845ff1 1861 if (!already_completed) {
61c5d6bf
YZ		 1862 if (req->r_unsafe_callback &&
1863 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1864 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1865 if (req->r_callback)
1866 req->r_callback(req, msg);
1867 else
1868 complete_all(&req->r_completion);
1869 }
f24e9980 1870
61c5d6bf
YZ		 1871 if (flags & CEPH_OSD_FLAG_ONDISK) {
1872 if (req->r_unsafe_callback && already_completed)
1873 req->r_unsafe_callback(req, false);
25845472 1874 complete_request(req);
61c5d6bf 1875 }
f24e9980 1876
ff513ace 1877out:
a40c4f10 1878 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1879 ceph_osdc_put_request(req);
1880 return;
ff513ace
ID		 1881out_unlock:
1882 mutex_unlock(&osdc->request_mutex);
1883 up_read(&osdc->map_sem);
1884 goto out;
f24e9980 1885
1b83bef2 1886bad_put:
37c89bde
LW		 1887 req->r_result = -EIO;
1888 __unregister_request(osdc, req);
1889 if (req->r_callback)
1890 req->r_callback(req, msg);
1891 else
1892 complete_all(&req->r_completion);
1893 complete_request(req);
1b83bef2 1894 ceph_osdc_put_request(req);
8058fd45
AE		 1895bad_mutex:
1896 mutex_unlock(&osdc->request_mutex);
ff513ace 1897 up_read(&osdc->map_sem);
f24e9980 1898bad:
1b83bef2
SW		 1899 pr_err("corrupt osd_op_reply got %d %d\n",
1900 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1901 ceph_msg_dump(msg);
f24e9980
SW		 1902}
1903
6f6c7006 1904static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1905{
f24e9980 1906 struct rb_node *p, *n;
f24e9980 1907
7eb71e03 1908 dout("%s %p\n", __func__, osdc);
6f6c7006
SW		 1909 for (p = rb_first(&osdc->osds); p; p = n) {
1910 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1911
6f6c7006
SW		 1912 n = rb_next(p);
1913 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1914 memcmp(&osd->o_con.peer_addr,
1915 ceph_osd_addr(osdc->osdmap,
1916 osd->o_osd),
1917 sizeof(struct ceph_entity_addr)) != 0)
1918 __reset_osd(osdc, osd);
f24e9980 1919 }
422d2cb8
YS		 1920}
1921
1922/*
6f6c7006
SW		 1923 * Requeue requests whose mapping to an OSD has changed. If requests map to
1924 * no osd, request a new map.
422d2cb8 1925 *
e6d50f67 1926 * Caller should hold map_sem for read.
422d2cb8 1927 */
9a1ea2db
JD		 1928static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1929 bool force_resend_writes)
422d2cb8 1930{
a40c4f10 1931 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1932 struct rb_node *p;
1933 int needmap = 0;
1934 int err;
9a1ea2db 1935 bool force_resend_req;
422d2cb8 1936
9a1ea2db
JD		 1937 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1938 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 1939 mutex_lock(&osdc->request_mutex);
6194ea89 1940 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1941 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1942 p = rb_next(p);
ab60b16d
AE		 1943
1944 /*
1945 * For linger requests that have not yet been
1946 * registered, move them to the linger list; they'll
1947 * be sent to the osd in the loop below. Unregister
1948 * the request before re-registering it as a linger
1949 * request to ensure the __map_request() below
1950 * will decide it needs to be sent.
1951 */
1952 if (req->r_linger && list_empty(&req->r_linger_item)) {
1953 dout("%p tid %llu restart on osd%d\n",
1954 req, req->r_tid,
1955 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 1956 ceph_osdc_get_request(req);
ab60b16d
AE		 1957 __unregister_request(osdc, req);
1958 __register_linger_request(osdc, req);
96e4dac6 1959 ceph_osdc_put_request(req);
ab60b16d
AE		 1960 continue;
1961 }
1962
9a1ea2db
JD		 1963 force_resend_req = force_resend ||
1964 (force_resend_writes &&
1965 req->r_flags & CEPH_OSD_FLAG_WRITE);
1966 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 1967 if (err < 0)
1968 continue; /* error */
1969 if (req->r_osd == NULL) {
1970 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1971 needmap++; /* request a newer map */
1972 } else if (err > 0) {
6194ea89
SW		 1973 if (!req->r_linger) {
1974 dout("%p tid %llu requeued on osd%d\n", req,
1975 req->r_tid,
1976 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1977 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1978 }
1979 }
a40c4f10
YS		 1980 }
1981
1982 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1983 r_linger_item) {
1984 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1985
9a1ea2db
JD		 1986 err = __map_request(osdc, req,
1987 force_resend || force_resend_writes);
ab60b16d 1988 dout("__map_request returned %d\n", err);
a40c4f10
YS		 1989 if (err < 0)
1990 continue; /* hrm! */
b0494532
ID		 1991 if (req->r_osd == NULL || err > 0) {
1992 if (req->r_osd == NULL) {
1993 dout("lingering %p tid %llu maps to no osd\n",
1994 req, req->r_tid);
1995 /*
1996 * A homeless lingering request makes
1997 * no sense, as it's job is to keep
1998 * a particular OSD connection open.
1999 * Request a newer map and kick the
2000 * request, knowing that it won't be
2001 * resent until we actually get a map
2002 * that can tell us where to send it.
2003 */
2004 needmap++;
2005 }
a40c4f10 2006
b0494532
ID		 2007 dout("kicking lingering %p tid %llu osd%d\n", req,
2008 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1);
2009 __register_request(osdc, req);
2010 __unregister_linger_request(osdc, req);
2011 }
6f6c7006 2012 }
14d2f38d 2013 reset_changed_osds(osdc);
f24e9980
SW		 2014 mutex_unlock(&osdc->request_mutex);
2015
2016 if (needmap) {
2017 dout("%d requests for down osds, need new map\n", needmap);
2018 ceph_monc_request_next_osdmap(&osdc->client->monc);
2019 }
422d2cb8 2020}
6f6c7006
SW		 2021
2022
f24e9980
SW		 2023/*
2024 * Process updated osd map.
2025 *
2026 * The message contains any number of incremental and full maps, normally
2027 * indicating some sort of topology change in the cluster. Kick requests
2028 * off to different OSDs as needed.
2029 */
2030void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2031{
2032 void *p, *end, *next;
2033 u32 nr_maps, maplen;
2034 u32 epoch;
2035 struct ceph_osdmap *newmap = NULL, *oldmap;
2036 int err;
2037 struct ceph_fsid fsid;
9a1ea2db 2038 bool was_full;
f24e9980
SW		 2039
2040 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2041 p = msg->front.iov_base;
2042 end = p + msg->front.iov_len;
2043
2044 /* verify fsid */
2045 ceph_decode_need(&p, end, sizeof(fsid), bad);
2046 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 2047 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2048 return;
f24e9980
SW		 2049
2050 down_write(&osdc->map_sem);
2051
9a1ea2db
JD		 2052 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2053
f24e9980
SW		 2054 /* incremental maps */
2055 ceph_decode_32_safe(&p, end, nr_maps, bad);
2056 dout(" %d inc maps\n", nr_maps);
2057 while (nr_maps > 0) {
2058 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2059 epoch = ceph_decode_32(&p);
2060 maplen = ceph_decode_32(&p);
f24e9980
SW		 2061 ceph_decode_need(&p, end, maplen, bad);
2062 next = p + maplen;
2063 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2064 dout("applying incremental map %u len %d\n",
2065 epoch, maplen);
2066 newmap = osdmap_apply_incremental(&p, next,
0c0a8de1 2067 osdc->osdmap);
f24e9980
SW		 2068 if (IS_ERR(newmap)) {
2069 err = PTR_ERR(newmap);
2070 goto bad;
2071 }
30dc6381 2072 BUG_ON(!newmap);
f24e9980
SW		 2073 if (newmap != osdc->osdmap) {
2074 ceph_osdmap_destroy(osdc->osdmap);
2075 osdc->osdmap = newmap;
2076 }
9a1ea2db
JD		 2077 was_full = was_full ||
2078 ceph_osdmap_flag(osdc->osdmap,
2079 CEPH_OSDMAP_FULL);
2080 kick_requests(osdc, 0, was_full);
f24e9980
SW		 2081 } else {
2082 dout("ignoring incremental map %u len %d\n",
2083 epoch, maplen);
2084 }
2085 p = next;
2086 nr_maps--;
2087 }
2088 if (newmap)
2089 goto done;
2090
2091 /* full maps */
2092 ceph_decode_32_safe(&p, end, nr_maps, bad);
2093 dout(" %d full maps\n", nr_maps);
2094 while (nr_maps) {
2095 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2096 epoch = ceph_decode_32(&p);
2097 maplen = ceph_decode_32(&p);
f24e9980
SW		 2098 ceph_decode_need(&p, end, maplen, bad);
2099 if (nr_maps > 1) {
2100 dout("skipping non-latest full map %u len %d\n",
2101 epoch, maplen);
2102 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2103 dout("skipping full map %u len %d, "
2104 "older than our %u\n", epoch, maplen,
2105 osdc->osdmap->epoch);
2106 } else {
38d6453c
SW		 2107 int skipped_map = 0;
2108
f24e9980 2109 dout("taking full map %u len %d\n", epoch, maplen);
a2505d63 2110 newmap = ceph_osdmap_decode(&p, p+maplen);
f24e9980
SW		 2111 if (IS_ERR(newmap)) {
2112 err = PTR_ERR(newmap);
2113 goto bad;
2114 }
30dc6381 2115 BUG_ON(!newmap);
f24e9980
SW		 2116 oldmap = osdc->osdmap;
2117 osdc->osdmap = newmap;
38d6453c
SW		 2118 if (oldmap) {
2119 if (oldmap->epoch + 1 < newmap->epoch)
2120 skipped_map = 1;
f24e9980 2121 ceph_osdmap_destroy(oldmap);
38d6453c 2122 }
9a1ea2db
JD		 2123 was_full = was_full ||
2124 ceph_osdmap_flag(osdc->osdmap,
2125 CEPH_OSDMAP_FULL);
2126 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2127 }
2128 p += maplen;
2129 nr_maps--;
2130 }
2131
b72e19b9
DC		 2132 if (!osdc->osdmap)
2133 goto bad;
f24e9980
SW		 2134done:
2135 downgrade_write(&osdc->map_sem);
82dcabad
ID		 2136 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2137 osdc->osdmap->epoch);
cd634fb6
SW		 2138
2139 /*
2140 * subscribe to subsequent osdmap updates if full to ensure
2141 * we find out when we are no longer full and stop returning
2142 * ENOSPC.
2143 */
d29adb34
JD		 2144 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2145 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2146 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2147 ceph_monc_request_next_osdmap(&osdc->client->monc);
2148
f9d25199
AE		 2149 mutex_lock(&osdc->request_mutex);
2150 __send_queued(osdc);
2151 mutex_unlock(&osdc->request_mutex);
f24e9980 2152 up_read(&osdc->map_sem);
03066f23 2153 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2154 return;
2155
2156bad:
2157 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2158 ceph_msg_dump(msg);
f24e9980 2159 up_write(&osdc->map_sem);
f24e9980
SW		 2160}
2161
a40c4f10
YS		 2162/*
2163 * watch/notify callback event infrastructure
2164 *
2165 * These callbacks are used both for watch and notify operations.
2166 */
2167static void __release_event(struct kref *kref)
2168{
2169 struct ceph_osd_event *event =
2170 container_of(kref, struct ceph_osd_event, kref);
2171
2172 dout("__release_event %p\n", event);
2173 kfree(event);
2174}
2175
2176static void get_event(struct ceph_osd_event *event)
2177{
2178 kref_get(&event->kref);
2179}
2180
2181void ceph_osdc_put_event(struct ceph_osd_event *event)
2182{
2183 kref_put(&event->kref, __release_event);
2184}
2185EXPORT_SYMBOL(ceph_osdc_put_event);
2186
2187static void __insert_event(struct ceph_osd_client *osdc,
2188 struct ceph_osd_event *new)
2189{
2190 struct rb_node **p = &osdc->event_tree.rb_node;
2191 struct rb_node *parent = NULL;
2192 struct ceph_osd_event *event = NULL;
2193
2194 while (*p) {
2195 parent = *p;
2196 event = rb_entry(parent, struct ceph_osd_event, node);
2197 if (new->cookie < event->cookie)
2198 p = &(*p)->rb_left;
2199 else if (new->cookie > event->cookie)
2200 p = &(*p)->rb_right;
2201 else
2202 BUG();
2203 }
2204
2205 rb_link_node(&new->node, parent, p);
2206 rb_insert_color(&new->node, &osdc->event_tree);
2207}
2208
2209static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2210 u64 cookie)
2211{
2212 struct rb_node **p = &osdc->event_tree.rb_node;
2213 struct rb_node *parent = NULL;
2214 struct ceph_osd_event *event = NULL;
2215
2216 while (*p) {
2217 parent = *p;
2218 event = rb_entry(parent, struct ceph_osd_event, node);
2219 if (cookie < event->cookie)
2220 p = &(*p)->rb_left;
2221 else if (cookie > event->cookie)
2222 p = &(*p)->rb_right;
2223 else
2224 return event;
2225 }
2226 return NULL;
2227}
2228
2229static void __remove_event(struct ceph_osd_event *event)
2230{
2231 struct ceph_osd_client *osdc = event->osdc;
2232
2233 if (!RB_EMPTY_NODE(&event->node)) {
2234 dout("__remove_event removed %p\n", event);
2235 rb_erase(&event->node, &osdc->event_tree);
2236 ceph_osdc_put_event(event);
2237 } else {
2238 dout("__remove_event didn't remove %p\n", event);
2239 }
2240}
2241
2242int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2243 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2244 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2245{
2246 struct ceph_osd_event *event;
2247
2248 event = kmalloc(sizeof(*event), GFP_NOIO);
2249 if (!event)
2250 return -ENOMEM;
2251
2252 dout("create_event %p\n", event);
2253 event->cb = event_cb;
3c663bbd 2254 event->one_shot = 0;
a40c4f10
YS		 2255 event->data = data;
2256 event->osdc = osdc;
2257 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2258 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2259 kref_init(&event->kref); /* one ref for us */
2260 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2261
2262 spin_lock(&osdc->event_lock);
2263 event->cookie = ++osdc->event_count;
2264 __insert_event(osdc, event);
2265 spin_unlock(&osdc->event_lock);
2266
2267 *pevent = event;
2268 return 0;
2269}
2270EXPORT_SYMBOL(ceph_osdc_create_event);
2271
2272void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2273{
2274 struct ceph_osd_client *osdc = event->osdc;
2275
2276 dout("cancel_event %p\n", event);
2277 spin_lock(&osdc->event_lock);
2278 __remove_event(event);
2279 spin_unlock(&osdc->event_lock);
2280 ceph_osdc_put_event(event); /* caller's */
2281}
2282EXPORT_SYMBOL(ceph_osdc_cancel_event);
2283
2284
2285static void do_event_work(struct work_struct *work)
2286{
2287 struct ceph_osd_event_work *event_work =
2288 container_of(work, struct ceph_osd_event_work, work);
2289 struct ceph_osd_event *event = event_work->event;
2290 u64 ver = event_work->ver;
2291 u64 notify_id = event_work->notify_id;
2292 u8 opcode = event_work->opcode;
2293
2294 dout("do_event_work completing %p\n", event);
2295 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2296 dout("do_event_work completed %p\n", event);
2297 ceph_osdc_put_event(event);
2298 kfree(event_work);
2299}
2300
2301
2302/*
2303 * Process osd watch notifications
2304 */
3c663bbd
AE		 2305static void handle_watch_notify(struct ceph_osd_client *osdc,
2306 struct ceph_msg *msg)
a40c4f10
YS		 2307{
2308 void *p, *end;
2309 u8 proto_ver;
2310 u64 cookie, ver, notify_id;
2311 u8 opcode;
2312 struct ceph_osd_event *event;
2313 struct ceph_osd_event_work *event_work;
2314
2315 p = msg->front.iov_base;
2316 end = p + msg->front.iov_len;
2317
2318 ceph_decode_8_safe(&p, end, proto_ver, bad);
2319 ceph_decode_8_safe(&p, end, opcode, bad);
2320 ceph_decode_64_safe(&p, end, cookie, bad);
2321 ceph_decode_64_safe(&p, end, ver, bad);
2322 ceph_decode_64_safe(&p, end, notify_id, bad);
2323
2324 spin_lock(&osdc->event_lock);
2325 event = __find_event(osdc, cookie);
2326 if (event) {
3c663bbd 2327 BUG_ON(event->one_shot);
a40c4f10 2328 get_event(event);
a40c4f10
YS		 2329 }
2330 spin_unlock(&osdc->event_lock);
2331 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2332 cookie, ver, event);
2333 if (event) {
2334 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10 2335 if (!event_work) {
91883cd2
ID		 2336 pr_err("couldn't allocate event_work\n");
2337 ceph_osdc_put_event(event);
2338 return;
a40c4f10 2339 }
6b0ae409 2340 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2341 event_work->event = event;
2342 event_work->ver = ver;
2343 event_work->notify_id = notify_id;
2344 event_work->opcode = opcode;
a40c4f10 2345
91883cd2
ID		 2346 queue_work(osdc->notify_wq, &event_work->work);
2347 }
a40c4f10 2348
a40c4f10
YS		 2349 return;
2350
2351bad:
2352 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 2353}
2354
e65550fd
AE		 2355/*
2356 * build new request AND message
2357 *
2358 */
2359void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2360 struct ceph_snap_context *snapc, u64 snap_id,
2361 struct timespec *mtime)
2362{
2363 struct ceph_msg *msg = req->r_request;
2364 void *p;
2365 size_t msg_size;
2366 int flags = req->r_flags;
2367 u64 data_len;
2368 unsigned int i;
2369
2370 req->r_snapid = snap_id;
84127282 2371 WARN_ON(snapc != req->r_snapc);
e65550fd
AE		 2372
2373 /* encode request */
2374 msg->hdr.version = cpu_to_le16(4);
2375
2376 p = msg->front.iov_base;
2377 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2378 req->r_request_osdmap_epoch = p;
2379 p += 4;
2380 req->r_request_flags = p;
2381 p += 4;
2382 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2383 ceph_encode_timespec(p, mtime);
2384 p += sizeof(struct ceph_timespec);
2385 req->r_request_reassert_version = p;
2386 p += sizeof(struct ceph_eversion); /* will get filled in */
2387
2388 /* oloc */
2389 ceph_encode_8(&p, 4);
2390 ceph_encode_8(&p, 4);
2391 ceph_encode_32(&p, 8 + 4 + 4);
2392 req->r_request_pool = p;
2393 p += 8;
2394 ceph_encode_32(&p, -1); /* preferred */
2395 ceph_encode_32(&p, 0); /* key len */
2396
2397 ceph_encode_8(&p, 1);
2398 req->r_request_pgid = p;
2399 p += 8 + 4;
2400 ceph_encode_32(&p, -1); /* preferred */
2401
2402 /* oid */
3c972c95
ID		 2403 ceph_encode_32(&p, req->r_base_oid.name_len);
2404 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
d30291b9 2405 dout("oid %*pE len %d\n", req->r_base_oid.name_len,
3c972c95
ID		 2406 req->r_base_oid.name, req->r_base_oid.name_len);
2407 p += req->r_base_oid.name_len;
e65550fd
AE		 2408
2409 /* ops--can imply data */
2410 ceph_encode_16(&p, (u16)req->r_num_ops);
2411 data_len = 0;
2412 for (i = 0; i < req->r_num_ops; i++) {
2413 data_len += osd_req_encode_op(req, p, i);
2414 p += sizeof(struct ceph_osd_op);
2415 }
2416
2417 /* snaps */
2418 ceph_encode_64(&p, req->r_snapid);
2419 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2420 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2421 if (req->r_snapc) {
84127282 2422 for (i = 0; i < req->r_snapc->num_snaps; i++) {
e65550fd
AE		 2423 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2424 }
2425 }
2426
2427 req->r_request_attempts = p;
2428 p += 4;
2429
2430 /* data */
2431 if (flags & CEPH_OSD_FLAG_WRITE) {
2432 u16 data_off;
2433
2434 /*
2435 * The header "data_off" is a hint to the receiver
2436 * allowing it to align received data into its
2437 * buffers such that there's no need to re-copy
2438 * it before writing it to disk (direct I/O).
2439 */
2440 data_off = (u16) (off & 0xffff);
2441 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2442 }
2443 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2444
2445 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2446 msg_size = p - msg->front.iov_base;
2447 msg->front.iov_len = msg_size;
2448 msg->hdr.front_len = cpu_to_le32(msg_size);
2449
2450 dout("build_request msg_size was %d\n", (int)msg_size);
2451}
2452EXPORT_SYMBOL(ceph_osdc_build_request);
2453
70636773
AE		 2454/*
2455 * Register request, send initial attempt.
2456 */
2457int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2458 struct ceph_osd_request *req,
2459 bool nofail)
2460{
0bbfdfe8 2461 int rc;
70636773 2462
f24e9980
SW		 2463 down_read(&osdc->map_sem);
2464 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2465
2466 rc = __ceph_osdc_start_request(osdc, req, nofail);
2467
f24e9980
SW		 2468 mutex_unlock(&osdc->request_mutex);
2469 up_read(&osdc->map_sem);
0bbfdfe8 2470
f24e9980
SW		 2471 return rc;
2472}
3d14c5d2 2473EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 2474
c9f9b93d
ID		 2475/*
2476 * Unregister a registered request. The request is not completed (i.e.
2477 * no callbacks or wakeups) - higher layers are supposed to know what
2478 * they are canceling.
2479 */
2480void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2481{
2482 struct ceph_osd_client *osdc = req->r_osdc;
2483
2484 mutex_lock(&osdc->request_mutex);
2485 if (req->r_linger)
2486 __unregister_linger_request(osdc, req);
2487 __unregister_request(osdc, req);
2488 mutex_unlock(&osdc->request_mutex);
2489
2490 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2491}
2492EXPORT_SYMBOL(ceph_osdc_cancel_request);
2493
f24e9980
SW		 2494/*
2495 * wait for a request to complete
2496 */
2497int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2498 struct ceph_osd_request *req)
2499{
2500 int rc;
2501
c9f9b93d
ID		 2502 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2503
f24e9980
SW		 2504 rc = wait_for_completion_interruptible(&req->r_completion);
2505 if (rc < 0) {
c9f9b93d
ID		 2506 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2507 ceph_osdc_cancel_request(req);
25845472 2508 complete_request(req);
f24e9980
SW		 2509 return rc;
2510 }
2511
c9f9b93d
ID		 2512 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2513 req->r_result);
f24e9980
SW		 2514 return req->r_result;
2515}
3d14c5d2 2516EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2517
2518/*
2519 * sync - wait for all in-flight requests to flush. avoid starvation.
2520 */
2521void ceph_osdc_sync(struct ceph_osd_client *osdc)
2522{
2523 struct ceph_osd_request *req;
2524 u64 last_tid, next_tid = 0;
2525
2526 mutex_lock(&osdc->request_mutex);
2527 last_tid = osdc->last_tid;
2528 while (1) {
2529 req = __lookup_request_ge(osdc, next_tid);
2530 if (!req)
2531 break;
2532 if (req->r_tid > last_tid)
2533 break;
2534
2535 next_tid = req->r_tid + 1;
2536 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2537 continue;
2538
2539 ceph_osdc_get_request(req);
2540 mutex_unlock(&osdc->request_mutex);
2541 dout("sync waiting on tid %llu (last is %llu)\n",
2542 req->r_tid, last_tid);
2543 wait_for_completion(&req->r_safe_completion);
2544 mutex_lock(&osdc->request_mutex);
2545 ceph_osdc_put_request(req);
2546 }
2547 mutex_unlock(&osdc->request_mutex);
2548 dout("sync done (thru tid %llu)\n", last_tid);
2549}
3d14c5d2 2550EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2551
dd935f44
JD		 2552/*
2553 * Call all pending notify callbacks - for use after a watch is
2554 * unregistered, to make sure no more callbacks for it will be invoked
2555 */
f6479449 2556void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44
JD		 2557{
2558 flush_workqueue(osdc->notify_wq);
2559}
2560EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2561
2562
f24e9980
SW		 2563/*
2564 * init, shutdown
2565 */
2566int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2567{
2568 int err;
2569
2570 dout("init\n");
2571 osdc->client = client;
2572 osdc->osdmap = NULL;
2573 init_rwsem(&osdc->map_sem);
f24e9980 2574 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2575 osdc->last_tid = 0;
2576 osdc->osds = RB_ROOT;
f5a2041b 2577 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2578 osdc->requests = RB_ROOT;
422d2cb8 2579 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2580 INIT_LIST_HEAD(&osdc->req_unsent);
2581 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2582 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2583 osdc->num_requests = 0;
2584 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2585 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2586 spin_lock_init(&osdc->event_lock);
2587 osdc->event_tree = RB_ROOT;
2588 osdc->event_count = 0;
f5a2041b
YS		 2589
2590 schedule_delayed_work(&osdc->osds_timeout_work,
a319bf56 2591 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
f24e9980 2592
5f44f142 2593 err = -ENOMEM;
9e767adb
ID		 2594 osdc->req_mempool = mempool_create_slab_pool(10,
2595 ceph_osd_request_cache);
f24e9980 2596 if (!osdc->req_mempool)
5f44f142 2597 goto out;
f24e9980 2598
d50b409f 2599 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
711da55d 2600 PAGE_SIZE, 10, true, "osd_op");
f24e9980 2601 if (err < 0)
5f44f142 2602 goto out_mempool;
d50b409f 2603 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
711da55d 2604 PAGE_SIZE, 10, true, "osd_op_reply");
c16e7869
SW		 2605 if (err < 0)
2606 goto out_msgpool;
a40c4f10 2607
dbcae088 2608 err = -ENOMEM;
a40c4f10 2609 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2610 if (!osdc->notify_wq)
c172ec5c
ID		 2611 goto out_msgpool_reply;
2612
f24e9980 2613 return 0;
5f44f142 2614
c172ec5c
ID		 2615out_msgpool_reply:
2616 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2617out_msgpool:
2618 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2619out_mempool:
2620 mempool_destroy(osdc->req_mempool);
2621out:
2622 return err;
f24e9980
SW		 2623}
2624
2625void ceph_osdc_stop(struct ceph_osd_client *osdc)
2626{
a40c4f10
YS		 2627 flush_workqueue(osdc->notify_wq);
2628 destroy_workqueue(osdc->notify_wq);
f24e9980 2629 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2630 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f
ID		 2631
2632 mutex_lock(&osdc->request_mutex);
2633 while (!RB_EMPTY_ROOT(&osdc->osds)) {
2634 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
2635 struct ceph_osd, o_node);
2636 remove_osd(osdc, osd);
2637 }
2638 mutex_unlock(&osdc->request_mutex);
2639
f24e9980
SW		 2640 if (osdc->osdmap) {
2641 ceph_osdmap_destroy(osdc->osdmap);
2642 osdc->osdmap = NULL;
2643 }
2644 mempool_destroy(osdc->req_mempool);
2645 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2646 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2647}
2648
2649/*
2650 * Read some contiguous pages. If we cross a stripe boundary, shorten
2651 * *plen. Return number of bytes read, or error.
2652 */
2653int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2654 struct ceph_vino vino, struct ceph_file_layout *layout,
2655 u64 off, u64 *plen,
2656 u32 truncate_seq, u64 truncate_size,
b7495fc2 2657 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2658{
2659 struct ceph_osd_request *req;
2660 int rc = 0;
2661
2662 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2663 vino.snap, off, *plen);
715e4cd4 2664 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 2665 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2666 NULL, truncate_seq, truncate_size,
153e5167 2667 false);
6816282d
SW		 2668 if (IS_ERR(req))
2669 return PTR_ERR(req);
f24e9980
SW		 2670
2671 /* it may be a short read due to an object boundary */
0fff87ec 2672
406e2c9f 2673 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2674 pages, *plen, page_align, false, false);
f24e9980 2675
e0c59487 2676 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2677 off, *plen, *plen, page_align);
f24e9980 2678
79528734 2679 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2680
f24e9980
SW		 2681 rc = ceph_osdc_start_request(osdc, req, false);
2682 if (!rc)
2683 rc = ceph_osdc_wait_request(osdc, req);
2684
2685 ceph_osdc_put_request(req);
2686 dout("readpages result %d\n", rc);
2687 return rc;
2688}
3d14c5d2 2689EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2690
2691/*
2692 * do a synchronous write on N pages
2693 */
2694int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2695 struct ceph_file_layout *layout,
2696 struct ceph_snap_context *snapc,
2697 u64 off, u64 len,
2698 u32 truncate_seq, u64 truncate_size,
2699 struct timespec *mtime,
24808826 2700 struct page **pages, int num_pages)
f24e9980
SW		 2701{
2702 struct ceph_osd_request *req;
2703 int rc = 0;
b7495fc2 2704 int page_align = off & ~PAGE_MASK;
f24e9980 2705
acead002 2706 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
715e4cd4 2707 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
f24e9980 2708 CEPH_OSD_OP_WRITE,
24808826 2709 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2710 snapc, truncate_seq, truncate_size,
153e5167 2711 true);
6816282d
SW		 2712 if (IS_ERR(req))
2713 return PTR_ERR(req);
f24e9980
SW		 2714
2715 /* it may be a short write due to an object boundary */
406e2c9f 2716 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2717 false, false);
2718 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2719
79528734 2720 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2721
87f979d3 2722 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2723 if (!rc)
2724 rc = ceph_osdc_wait_request(osdc, req);
2725
2726 ceph_osdc_put_request(req);
2727 if (rc == 0)
2728 rc = len;
2729 dout("writepages result %d\n", rc);
2730 return rc;
2731}
3d14c5d2 2732EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2733
5522ae0b
AE		 2734int ceph_osdc_setup(void)
2735{
3f1af42a
ID		 2736 size_t size = sizeof(struct ceph_osd_request) +
2737 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
2738
5522ae0b 2739 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 2740 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
2741 0, 0, NULL);
5522ae0b
AE		 2742
2743 return ceph_osd_request_cache ? 0 : -ENOMEM;
2744}
2745EXPORT_SYMBOL(ceph_osdc_setup);
2746
2747void ceph_osdc_cleanup(void)
2748{
2749 BUG_ON(!ceph_osd_request_cache);
2750 kmem_cache_destroy(ceph_osd_request_cache);
2751 ceph_osd_request_cache = NULL;
2752}
2753EXPORT_SYMBOL(ceph_osdc_cleanup);
2754
f24e9980
SW		 2755/*
2756 * handle incoming message
2757 */
2758static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2759{
2760 struct ceph_osd *osd = con->private;
32c895e7 2761 struct ceph_osd_client *osdc;
f24e9980
SW		 2762 int type = le16_to_cpu(msg->hdr.type);
2763
2764 if (!osd)
4a32f93d 2765 goto out;
32c895e7 2766 osdc = osd->o_osdc;
f24e9980
SW		 2767
2768 switch (type) {
2769 case CEPH_MSG_OSD_MAP:
2770 ceph_osdc_handle_map(osdc, msg);
2771 break;
2772 case CEPH_MSG_OSD_OPREPLY:
70cf052d 2773 handle_reply(osdc, msg);
f24e9980 2774 break;
a40c4f10
YS		 2775 case CEPH_MSG_WATCH_NOTIFY:
2776 handle_watch_notify(osdc, msg);
2777 break;
f24e9980
SW		 2778
2779 default:
2780 pr_err("received unknown message type %d %s\n", type,
2781 ceph_msg_type_name(type));
2782 }
4a32f93d 2783out:
f24e9980
SW		 2784 ceph_msg_put(msg);
2785}
2786
5b3a4db3 2787/*
d15f9d69
ID		 2788 * Lookup and return message for incoming reply. Don't try to do
2789 * anything about a larger than preallocated data portion of the
2790 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 2791 */
2792static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2793 struct ceph_msg_header *hdr,
2794 int *skip)
f24e9980
SW		 2795{
2796 struct ceph_osd *osd = con->private;
2797 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2798 struct ceph_msg *m;
0547a9b3 2799 struct ceph_osd_request *req;
3f0a4ac5 2800 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2801 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2802 u64 tid;
f24e9980 2803
0547a9b3
YS		 2804 tid = le64_to_cpu(hdr->tid);
2805 mutex_lock(&osdc->request_mutex);
fcd00b68 2806 req = lookup_request(&osdc->requests, tid);
0547a9b3 2807 if (!req) {
cd8140c6
ID		 2808 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
2809 osd->o_osd, tid);
0547a9b3 2810 m = NULL;
d15f9d69 2811 *skip = 1;
0547a9b3
YS		 2812 goto out;
2813 }
c16e7869 2814
ace6d3a9 2815 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2816
f2be82b0 2817 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 2818 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
2819 __func__, osd->o_osd, req->r_tid, front_len,
2820 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 2821 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2822 false);
a79832f2 2823 if (!m)
c16e7869
SW		 2824 goto out;
2825 ceph_msg_put(req->r_reply);
2826 req->r_reply = m;
2827 }
0fff87ec 2828
d15f9d69
ID		 2829 if (data_len > req->r_reply->data_length) {
2830 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
2831 __func__, osd->o_osd, req->r_tid, data_len,
2832 req->r_reply->data_length);
2833 m = NULL;
2834 *skip = 1;
2835 goto out;
0547a9b3 2836 }
d15f9d69
ID		 2837
2838 m = ceph_msg_get(req->r_reply);
c16e7869 2839 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2840
2841out:
2842 mutex_unlock(&osdc->request_mutex);
2450418c 2843 return m;
5b3a4db3
SW		 2844}
2845
2846static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2847 struct ceph_msg_header *hdr,
2848 int *skip)
2849{
2850 struct ceph_osd *osd = con->private;
2851 int type = le16_to_cpu(hdr->type);
2852 int front = le32_to_cpu(hdr->front_len);
2853
1c20f2d2 2854 *skip = 0;
5b3a4db3
SW		 2855 switch (type) {
2856 case CEPH_MSG_OSD_MAP:
a40c4f10 2857 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2858 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2859 case CEPH_MSG_OSD_OPREPLY:
2860 return get_reply(con, hdr, skip);
2861 default:
2862 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2863 osd->o_osd);
2864 *skip = 1;
2865 return NULL;
2866 }
f24e9980
SW		 2867}
2868
2869/*
2870 * Wrappers to refcount containing ceph_osd struct
2871 */
2872static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2873{
2874 struct ceph_osd *osd = con->private;
2875 if (get_osd(osd))
2876 return con;
2877 return NULL;
2878}
2879
2880static void put_osd_con(struct ceph_connection *con)
2881{
2882 struct ceph_osd *osd = con->private;
2883 put_osd(osd);
2884}
2885
4e7a5dcd
SW		 2886/*
2887 * authentication
2888 */
a3530df3
AE		 2889/*
2890 * Note: returned pointer is the address of a structure that's
2891 * managed separately. Caller must *not* attempt to free it.
2892 */
2893static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2894 int *proto, int force_new)
4e7a5dcd
SW		 2895{
2896 struct ceph_osd *o = con->private;
2897 struct ceph_osd_client *osdc = o->o_osdc;
2898 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2899 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2900
74f1869f 2901 if (force_new && auth->authorizer) {
6c1ea260 2902 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 2903 auth->authorizer = NULL;
2904 }
27859f97
SW		 2905 if (!auth->authorizer) {
2906 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2907 auth);
4e7a5dcd 2908 if (ret)
a3530df3 2909 return ERR_PTR(ret);
27859f97
SW		 2910 } else {
2911 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2912 auth);
2913 if (ret)
2914 return ERR_PTR(ret);
4e7a5dcd 2915 }
4e7a5dcd 2916 *proto = ac->protocol;
74f1869f 2917
a3530df3 2918 return auth;
4e7a5dcd
SW		 2919}
2920
2921
2922static int verify_authorizer_reply(struct ceph_connection *con, int len)
2923{
2924 struct ceph_osd *o = con->private;
2925 struct ceph_osd_client *osdc = o->o_osdc;
2926 struct ceph_auth_client *ac = osdc->client->monc.auth;
2927
27859f97 2928 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2929}
2930
9bd2e6f8
SW		 2931static int invalidate_authorizer(struct ceph_connection *con)
2932{
2933 struct ceph_osd *o = con->private;
2934 struct ceph_osd_client *osdc = o->o_osdc;
2935 struct ceph_auth_client *ac = osdc->client->monc.auth;
2936
27859f97 2937 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2938 return ceph_monc_validate_auth(&osdc->client->monc);
2939}
4e7a5dcd 2940
79dbd1ba 2941static int osd_sign_message(struct ceph_msg *msg)
33d07337 2942{
79dbd1ba 2943 struct ceph_osd *o = msg->con->private;
33d07337 2944 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 2945
33d07337
YZ		 2946 return ceph_auth_sign_message(auth, msg);
2947}
2948
79dbd1ba 2949static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 2950{
79dbd1ba 2951 struct ceph_osd *o = msg->con->private;
33d07337 2952 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 2953
33d07337
YZ		 2954 return ceph_auth_check_message_signature(auth, msg);
2955}
2956
9e32789f 2957static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2958 .get = get_osd_con,
2959 .put = put_osd_con,
2960 .dispatch = dispatch,
4e7a5dcd
SW		 2961 .get_authorizer = get_authorizer,
2962 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2963 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2964 .alloc_msg = alloc_msg,
79dbd1ba
ID		 2965 .sign_message = osd_sign_message,
2966 .check_message_signature = osd_check_message_signature,
81b024e7 2967 .fault = osd_reset,
f24e9980 2968};
Ubuntu Disco kernel mirror for Proxmox VE and PMG