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libceph: switch to calc_target(), part 1
[deliverable/linux.git] / net / ceph / osd_client.c
CommitLineData
a4ce40a9 1
3d14c5d2 2#include <linux/ceph/ceph_debug.h>
f24e9980 3
3d14c5d2 4#include <linux/module.h>
f24e9980
SW		 5#include <linux/err.h>
6#include <linux/highmem.h>
7#include <linux/mm.h>
8#include <linux/pagemap.h>
9#include <linux/slab.h>
10#include <linux/uaccess.h>
68b4476b
YS		 11#ifdef CONFIG_BLOCK
12#include <linux/bio.h>
13#endif
f24e9980 14
3d14c5d2
YS		 15#include <linux/ceph/libceph.h>
16#include <linux/ceph/osd_client.h>
17#include <linux/ceph/messenger.h>
18#include <linux/ceph/decode.h>
19#include <linux/ceph/auth.h>
20#include <linux/ceph/pagelist.h>
f24e9980 21
c16e7869 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
63244fa1
ID		 301/*
302 * Assumes @t is zero-initialized.
303 */
304static void target_init(struct ceph_osd_request_target *t)
305{
306 ceph_oid_init(&t->base_oid);
307 ceph_oloc_init(&t->base_oloc);
308 ceph_oid_init(&t->target_oid);
309 ceph_oloc_init(&t->target_oloc);
310
311 ceph_osds_init(&t->acting);
312 ceph_osds_init(&t->up);
313 t->size = -1;
314 t->min_size = -1;
315
316 t->osd = CEPH_HOMELESS_OSD;
317}
318
319static void target_destroy(struct ceph_osd_request_target *t)
320{
321 ceph_oid_destroy(&t->base_oid);
322 ceph_oid_destroy(&t->target_oid);
323}
324
f24e9980
SW		 325/*
326 * requests
327 */
9e94af20 328static void ceph_osdc_release_request(struct kref *kref)
f24e9980 329{
9e94af20
ID		 330 struct ceph_osd_request *req = container_of(kref,
331 struct ceph_osd_request, r_kref);
5476492f 332 unsigned int which;
415e49a9 333
9e94af20
ID		 334 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
335 req->r_request, req->r_reply);
6562d661
ID		 336 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
337 WARN_ON(!list_empty(&req->r_req_lru_item));
338 WARN_ON(!list_empty(&req->r_osd_item));
339 WARN_ON(!list_empty(&req->r_linger_item));
340 WARN_ON(!list_empty(&req->r_linger_osd_item));
341 WARN_ON(req->r_osd);
9e94af20 342
415e49a9
SW		 343 if (req->r_request)
344 ceph_msg_put(req->r_request);
ace6d3a9 345 if (req->r_reply) {
8921d114 346 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 347 ceph_msg_put(req->r_reply);
ace6d3a9 348 }
0fff87ec 349
5476492f
AE		 350 for (which = 0; which < req->r_num_ops; which++)
351 osd_req_op_data_release(req, which);
0fff87ec 352
a66dd383 353 target_destroy(&req->r_t);
415e49a9 354 ceph_put_snap_context(req->r_snapc);
d30291b9 355
415e49a9
SW		 356 if (req->r_mempool)
357 mempool_free(req, req->r_osdc->req_mempool);
3f1af42a 358 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
5522ae0b 359 kmem_cache_free(ceph_osd_request_cache, req);
3f1af42a
ID		 360 else
361 kfree(req);
f24e9980 362}
9e94af20
ID		 363
364void ceph_osdc_get_request(struct ceph_osd_request *req)
365{
366 dout("%s %p (was %d)\n", __func__, req,
367 atomic_read(&req->r_kref.refcount));
368 kref_get(&req->r_kref);
369}
370EXPORT_SYMBOL(ceph_osdc_get_request);
371
372void ceph_osdc_put_request(struct ceph_osd_request *req)
373{
3ed97d63
ID		 374 if (req) {
375 dout("%s %p (was %d)\n", __func__, req,
376 atomic_read(&req->r_kref.refcount));
377 kref_put(&req->r_kref, ceph_osdc_release_request);
378 }
9e94af20
ID		 379}
380EXPORT_SYMBOL(ceph_osdc_put_request);
68b4476b 381
3499e8a5 382struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 383 struct ceph_snap_context *snapc,
1b83bef2 384 unsigned int num_ops,
3499e8a5 385 bool use_mempool,
54a54007 386 gfp_t gfp_flags)
f24e9980
SW		 387{
388 struct ceph_osd_request *req;
1b83bef2 389
f24e9980 390 if (use_mempool) {
3f1af42a 391 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
3499e8a5 392 req = mempool_alloc(osdc->req_mempool, gfp_flags);
3f1af42a
ID		 393 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
394 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
f24e9980 395 } else {
3f1af42a
ID		 396 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
397 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
398 gfp_flags);
f24e9980 399 }
3f1af42a 400 if (unlikely(!req))
a79832f2 401 return NULL;
f24e9980 402
3f1af42a
ID		 403 /* req only, each op is zeroed in _osd_req_op_init() */
404 memset(req, 0, sizeof(*req));
405
f24e9980
SW		 406 req->r_osdc = osdc;
407 req->r_mempool = use_mempool;
79528734 408 req->r_num_ops = num_ops;
84127282
ID		 409 req->r_snapid = CEPH_NOSNAP;
410 req->r_snapc = ceph_get_snap_context(snapc);
68b4476b 411
415e49a9 412 kref_init(&req->r_kref);
f24e9980
SW		 413 init_completion(&req->r_completion);
414 init_completion(&req->r_safe_completion);
a978fa20 415 RB_CLEAR_NODE(&req->r_node);
f24e9980 416 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10 417 INIT_LIST_HEAD(&req->r_linger_item);
1d0326b1 418 INIT_LIST_HEAD(&req->r_linger_osd_item);
935b639a 419 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 420 INIT_LIST_HEAD(&req->r_osd_item);
421
a66dd383 422 target_init(&req->r_t);
22116525 423
13d1ad16
ID		 424 dout("%s req %p\n", __func__, req);
425 return req;
426}
427EXPORT_SYMBOL(ceph_osdc_alloc_request);
3f1af42a 428
13d1ad16
ID		 429int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
430{
431 struct ceph_osd_client *osdc = req->r_osdc;
432 struct ceph_msg *msg;
433 int msg_size;
c16e7869 434
d30291b9
ID		 435 WARN_ON(ceph_oid_empty(&req->r_base_oid));
436
13d1ad16 437 /* create request message */
ae458f5a
ID		 438 msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
439 msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
440 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
441 msg_size += 1 + 8 + 4 + 4; /* pgid */
13d1ad16
ID		 442 msg_size += 4 + req->r_base_oid.name_len; /* oid */
443 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
ae458f5a
ID		 444 msg_size += 8; /* snapid */
445 msg_size += 8; /* snap_seq */
13d1ad16 446 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
ae458f5a
ID		 447 msg_size += 4; /* retry_attempt */
448
13d1ad16 449 if (req->r_mempool)
8f3bc053 450 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 451 else
13d1ad16
ID		 452 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
453 if (!msg)
454 return -ENOMEM;
68b4476b 455
f24e9980 456 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5 457 req->r_request = msg;
3499e8a5 458
13d1ad16
ID		 459 /* create reply message */
460 msg_size = OSD_OPREPLY_FRONT_LEN;
711da55d
ID		 461 msg_size += req->r_base_oid.name_len;
462 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
13d1ad16
ID		 463
464 if (req->r_mempool)
465 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
466 else
467 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
468 if (!msg)
469 return -ENOMEM;
470
471 req->r_reply = msg;
472
473 return 0;
3499e8a5 474}
13d1ad16 475EXPORT_SYMBOL(ceph_osdc_alloc_messages);
3499e8a5 476
a8dd0a37 477static bool osd_req_opcode_valid(u16 opcode)
68b4476b 478{
a8dd0a37 479 switch (opcode) {
70b5bfa3
ID		 480#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
481__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
482#undef GENERATE_CASE
a8dd0a37
AE		 483 default:
484 return false;
485 }
486}
487
33803f33
AE		 488/*
489 * This is an osd op init function for opcodes that have no data or
490 * other information associated with them. It also serves as a
491 * common init routine for all the other init functions, below.
492 */
c99d2d4a 493static struct ceph_osd_req_op *
49719778 494_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
144cba14 495 u16 opcode, u32 flags)
33803f33 496{
c99d2d4a
AE		 497 struct ceph_osd_req_op *op;
498
499 BUG_ON(which >= osd_req->r_num_ops);
33803f33
AE		 500 BUG_ON(!osd_req_opcode_valid(opcode));
501
c99d2d4a 502 op = &osd_req->r_ops[which];
33803f33 503 memset(op, 0, sizeof (*op));
33803f33 504 op->op = opcode;
144cba14 505 op->flags = flags;
c99d2d4a
AE		 506
507 return op;
33803f33
AE		 508}
509
49719778 510void osd_req_op_init(struct ceph_osd_request *osd_req,
144cba14 511 unsigned int which, u16 opcode, u32 flags)
49719778 512{
144cba14 513 (void)_osd_req_op_init(osd_req, which, opcode, flags);
49719778
AE		 514}
515EXPORT_SYMBOL(osd_req_op_init);
516
c99d2d4a
AE		 517void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
518 unsigned int which, u16 opcode,
33803f33
AE		 519 u64 offset, u64 length,
520 u64 truncate_size, u32 truncate_seq)
521{
144cba14
YZ		 522 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
523 opcode, 0);
33803f33
AE		 524 size_t payload_len = 0;
525
ad7a60de 526 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
e30b7577
ID		 527 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
528 opcode != CEPH_OSD_OP_TRUNCATE);
33803f33 529
33803f33
AE		 530 op->extent.offset = offset;
531 op->extent.length = length;
532 op->extent.truncate_size = truncate_size;
533 op->extent.truncate_seq = truncate_seq;
e30b7577 534 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
33803f33
AE		 535 payload_len += length;
536
de2aa102 537 op->indata_len = payload_len;
33803f33
AE		 538}
539EXPORT_SYMBOL(osd_req_op_extent_init);
540
c99d2d4a
AE		 541void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
542 unsigned int which, u64 length)
e5975c7c 543{
c99d2d4a
AE		 544 struct ceph_osd_req_op *op;
545 u64 previous;
546
547 BUG_ON(which >= osd_req->r_num_ops);
548 op = &osd_req->r_ops[which];
549 previous = op->extent.length;
e5975c7c
AE		 550
551 if (length == previous)
552 return; /* Nothing to do */
553 BUG_ON(length > previous);
554
555 op->extent.length = length;
de2aa102 556 op->indata_len -= previous - length;
e5975c7c
AE		 557}
558EXPORT_SYMBOL(osd_req_op_extent_update);
559
2c63f49a
YZ		 560void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
561 unsigned int which, u64 offset_inc)
562{
563 struct ceph_osd_req_op *op, *prev_op;
564
565 BUG_ON(which + 1 >= osd_req->r_num_ops);
566
567 prev_op = &osd_req->r_ops[which];
568 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
569 /* dup previous one */
570 op->indata_len = prev_op->indata_len;
571 op->outdata_len = prev_op->outdata_len;
572 op->extent = prev_op->extent;
573 /* adjust offset */
574 op->extent.offset += offset_inc;
575 op->extent.length -= offset_inc;
576
577 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
578 op->indata_len -= offset_inc;
579}
580EXPORT_SYMBOL(osd_req_op_extent_dup_last);
581
c99d2d4a 582void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
04017e29 583 u16 opcode, const char *class, const char *method)
33803f33 584{
144cba14
YZ		 585 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
586 opcode, 0);
5f562df5 587 struct ceph_pagelist *pagelist;
33803f33
AE		 588 size_t payload_len = 0;
589 size_t size;
590
591 BUG_ON(opcode != CEPH_OSD_OP_CALL);
592
5f562df5
AE		 593 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
594 BUG_ON(!pagelist);
595 ceph_pagelist_init(pagelist);
596
33803f33
AE		 597 op->cls.class_name = class;
598 size = strlen(class);
599 BUG_ON(size > (size_t) U8_MAX);
600 op->cls.class_len = size;
5f562df5 601 ceph_pagelist_append(pagelist, class, size);
33803f33
AE		 602 payload_len += size;
603
604 op->cls.method_name = method;
605 size = strlen(method);
606 BUG_ON(size > (size_t) U8_MAX);
607 op->cls.method_len = size;
5f562df5 608 ceph_pagelist_append(pagelist, method, size);
33803f33
AE		 609 payload_len += size;
610
a4ce40a9 611 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
5f562df5 612
33803f33
AE		 613 op->cls.argc = 0; /* currently unused */
614
de2aa102 615 op->indata_len = payload_len;
33803f33
AE		 616}
617EXPORT_SYMBOL(osd_req_op_cls_init);
8c042b0d 618
d74b50be
YZ		 619int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
620 u16 opcode, const char *name, const void *value,
621 size_t size, u8 cmp_op, u8 cmp_mode)
622{
144cba14
YZ		 623 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
624 opcode, 0);
d74b50be
YZ		 625 struct ceph_pagelist *pagelist;
626 size_t payload_len;
627
628 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
629
630 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
631 if (!pagelist)
632 return -ENOMEM;
633
634 ceph_pagelist_init(pagelist);
635
636 payload_len = strlen(name);
637 op->xattr.name_len = payload_len;
638 ceph_pagelist_append(pagelist, name, payload_len);
639
640 op->xattr.value_len = size;
641 ceph_pagelist_append(pagelist, value, size);
642 payload_len += size;
643
644 op->xattr.cmp_op = cmp_op;
645 op->xattr.cmp_mode = cmp_mode;
646
647 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
de2aa102 648 op->indata_len = payload_len;
d74b50be
YZ		 649 return 0;
650}
651EXPORT_SYMBOL(osd_req_op_xattr_init);
652
c99d2d4a
AE		 653void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
654 unsigned int which, u16 opcode,
33803f33
AE		 655 u64 cookie, u64 version, int flag)
656{
144cba14
YZ		 657 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
658 opcode, 0);
33803f33 659
c99d2d4a 660 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
33803f33
AE		 661
662 op->watch.cookie = cookie;
9ef1ee5a 663 op->watch.ver = version;
33803f33 664 if (opcode == CEPH_OSD_OP_WATCH && flag)
c99d2d4a 665 op->watch.flag = (u8)1;
33803f33
AE		 666}
667EXPORT_SYMBOL(osd_req_op_watch_init);
668
c647b8a8
ID		 669void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
670 unsigned int which,
671 u64 expected_object_size,
672 u64 expected_write_size)
673{
674 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
144cba14
YZ		 675 CEPH_OSD_OP_SETALLOCHINT,
676 0);
c647b8a8
ID		 677
678 op->alloc_hint.expected_object_size = expected_object_size;
679 op->alloc_hint.expected_write_size = expected_write_size;
680
681 /*
682 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
683 * not worth a feature bit. Set FAILOK per-op flag to make
684 * sure older osds don't trip over an unsupported opcode.
685 */
686 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
687}
688EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
689
90af3602 690static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
ec9123c5
AE		 691 struct ceph_osd_data *osd_data)
692{
693 u64 length = ceph_osd_data_length(osd_data);
694
695 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
696 BUG_ON(length > (u64) SIZE_MAX);
697 if (length)
90af3602 698 ceph_msg_data_add_pages(msg, osd_data->pages,
ec9123c5
AE		 699 length, osd_data->alignment);
700 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
701 BUG_ON(!length);
90af3602 702 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
ec9123c5
AE		 703#ifdef CONFIG_BLOCK
704 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
90af3602 705 ceph_msg_data_add_bio(msg, osd_data->bio, length);
ec9123c5
AE		 706#endif
707 } else {
708 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
709 }
710}
711
a8dd0a37 712static u64 osd_req_encode_op(struct ceph_osd_request *req,
79528734 713 struct ceph_osd_op *dst, unsigned int which)
a8dd0a37 714{
79528734 715 struct ceph_osd_req_op *src;
04017e29 716 struct ceph_osd_data *osd_data;
54d50649 717 u64 request_data_len = 0;
04017e29 718 u64 data_length;
a8dd0a37 719
79528734
AE		 720 BUG_ON(which >= req->r_num_ops);
721 src = &req->r_ops[which];
a8dd0a37
AE		 722 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
723 pr_err("unrecognized osd opcode %d\n", src->op);
724
725 return 0;
726 }
727
728 switch (src->op) {
729 case CEPH_OSD_OP_STAT:
49719778
AE		 730 osd_data = &src->raw_data_in;
731 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 732 break;
733 case CEPH_OSD_OP_READ:
734 case CEPH_OSD_OP_WRITE:
e30b7577 735 case CEPH_OSD_OP_WRITEFULL:
ad7a60de 736 case CEPH_OSD_OP_ZERO:
ad7a60de 737 case CEPH_OSD_OP_TRUNCATE:
e30b7577
ID		 738 if (src->op == CEPH_OSD_OP_WRITE ||
739 src->op == CEPH_OSD_OP_WRITEFULL)
54d50649 740 request_data_len = src->extent.length;
a8dd0a37
AE		 741 dst->extent.offset = cpu_to_le64(src->extent.offset);
742 dst->extent.length = cpu_to_le64(src->extent.length);
743 dst->extent.truncate_size =
744 cpu_to_le64(src->extent.truncate_size);
745 dst->extent.truncate_seq =
746 cpu_to_le32(src->extent.truncate_seq);
04017e29 747 osd_data = &src->extent.osd_data;
e30b7577
ID		 748 if (src->op == CEPH_OSD_OP_WRITE ||
749 src->op == CEPH_OSD_OP_WRITEFULL)
04017e29 750 ceph_osdc_msg_data_add(req->r_request, osd_data);
5476492f 751 else
04017e29 752 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 753 break;
754 case CEPH_OSD_OP_CALL:
a8dd0a37
AE		 755 dst->cls.class_len = src->cls.class_len;
756 dst->cls.method_len = src->cls.method_len;
04017e29
AE		 757 osd_data = &src->cls.request_info;
758 ceph_osdc_msg_data_add(req->r_request, osd_data);
759 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
760 request_data_len = osd_data->pagelist->length;
761
762 osd_data = &src->cls.request_data;
763 data_length = ceph_osd_data_length(osd_data);
764 if (data_length) {
765 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
766 dst->cls.indata_len = cpu_to_le32(data_length);
767 ceph_osdc_msg_data_add(req->r_request, osd_data);
de2aa102 768 src->indata_len += data_length;
04017e29
AE		 769 request_data_len += data_length;
770 }
771 osd_data = &src->cls.response_data;
772 ceph_osdc_msg_data_add(req->r_reply, osd_data);
a8dd0a37
AE		 773 break;
774 case CEPH_OSD_OP_STARTSYNC:
775 break;
776 case CEPH_OSD_OP_NOTIFY_ACK:
777 case CEPH_OSD_OP_WATCH:
778 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
779 dst->watch.ver = cpu_to_le64(src->watch.ver);
780 dst->watch.flag = src->watch.flag;
781 break;
c647b8a8
ID		 782 case CEPH_OSD_OP_SETALLOCHINT:
783 dst->alloc_hint.expected_object_size =
784 cpu_to_le64(src->alloc_hint.expected_object_size);
785 dst->alloc_hint.expected_write_size =
786 cpu_to_le64(src->alloc_hint.expected_write_size);
787 break;
d74b50be
YZ		 788 case CEPH_OSD_OP_SETXATTR:
789 case CEPH_OSD_OP_CMPXATTR:
790 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
791 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
792 dst->xattr.cmp_op = src->xattr.cmp_op;
793 dst->xattr.cmp_mode = src->xattr.cmp_mode;
794 osd_data = &src->xattr.osd_data;
795 ceph_osdc_msg_data_add(req->r_request, osd_data);
796 request_data_len = osd_data->pagelist->length;
797 break;
864e9197
YZ		 798 case CEPH_OSD_OP_CREATE:
799 case CEPH_OSD_OP_DELETE:
800 break;
a8dd0a37 801 default:
4c46459c 802 pr_err("unsupported osd opcode %s\n",
8f63ca2d 803 ceph_osd_op_name(src->op));
4c46459c 804 WARN_ON(1);
a8dd0a37
AE		 805
806 return 0;
68b4476b 807 }
7b25bf5f 808
a8dd0a37 809 dst->op = cpu_to_le16(src->op);
7b25bf5f 810 dst->flags = cpu_to_le32(src->flags);
de2aa102 811 dst->payload_len = cpu_to_le32(src->indata_len);
175face2 812
54d50649 813 return request_data_len;
68b4476b
YS		 814}
815
3499e8a5
YS		 816/*
817 * build new request AND message, calculate layout, and adjust file
818 * extent as needed.
819 *
820 * if the file was recently truncated, we include information about its
821 * old and new size so that the object can be updated appropriately. (we
822 * avoid synchronously deleting truncated objects because it's slow.)
823 *
824 * if @do_sync, include a 'startsync' command so that the osd will flush
825 * data quickly.
826 */
827struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
828 struct ceph_file_layout *layout,
829 struct ceph_vino vino,
715e4cd4
YZ		 830 u64 off, u64 *plen,
831 unsigned int which, int num_ops,
3499e8a5
YS		 832 int opcode, int flags,
833 struct ceph_snap_context *snapc,
3499e8a5
YS		 834 u32 truncate_seq,
835 u64 truncate_size,
153e5167 836 bool use_mempool)
3499e8a5 837{
68b4476b 838 struct ceph_osd_request *req;
75d1c941
AE		 839 u64 objnum = 0;
840 u64 objoff = 0;
841 u64 objlen = 0;
6816282d 842 int r;
68b4476b 843
ad7a60de 844 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
864e9197
YZ		 845 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
846 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
68b4476b 847
acead002 848 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 849 GFP_NOFS);
13d1ad16
ID		 850 if (!req) {
851 r = -ENOMEM;
852 goto fail;
853 }
79528734 854
d178a9e7 855 req->r_flags = flags;
3499e8a5
YS		 856
857 /* calculate max write size */
a19dadfb 858 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
13d1ad16
ID		 859 if (r)
860 goto fail;
a19dadfb 861
864e9197 862 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
144cba14 863 osd_req_op_init(req, which, opcode, 0);
864e9197
YZ		 864 } else {
865 u32 object_size = le32_to_cpu(layout->fl_object_size);
866 u32 object_base = off - objoff;
867 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
868 if (truncate_size <= object_base) {
869 truncate_size = 0;
870 } else {
871 truncate_size -= object_base;
872 if (truncate_size > object_size)
873 truncate_size = object_size;
874 }
ccca4e37 875 }
715e4cd4 876 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
864e9197
YZ		 877 truncate_size, truncate_seq);
878 }
d18d1e28 879
3c972c95 880 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
d30291b9 881 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
dbe0fc41 882
13d1ad16
ID		 883 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
884 if (r)
885 goto fail;
886
f24e9980 887 return req;
13d1ad16
ID		 888
889fail:
890 ceph_osdc_put_request(req);
891 return ERR_PTR(r);
f24e9980 892}
3d14c5d2 893EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 894
895/*
896 * We keep osd requests in an rbtree, sorted by ->r_tid.
897 */
fcd00b68 898DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
f24e9980
SW		 899
900static struct ceph_osd_request *
901__lookup_request_ge(struct ceph_osd_client *osdc,
902 u64 tid)
903{
904 struct ceph_osd_request *req;
905 struct rb_node *n = osdc->requests.rb_node;
906
907 while (n) {
908 req = rb_entry(n, struct ceph_osd_request, r_node);
909 if (tid < req->r_tid) {
910 if (!n->rb_left)
911 return req;
912 n = n->rb_left;
913 } else if (tid > req->r_tid) {
914 n = n->rb_right;
915 } else {
916 return req;
917 }
918 }
919 return NULL;
920}
921
2cc6128a
ID		 922static void __kick_linger_request(struct ceph_osd_request *req)
923{
924 struct ceph_osd_client *osdc = req->r_osdc;
925 struct ceph_osd *osd = req->r_osd;
926
927 /*
928 * Linger requests need to be resent with a new tid to avoid
929 * the dup op detection logic on the OSDs. Achieve this with
930 * a re-register dance instead of open-coding.
931 */
932 ceph_osdc_get_request(req);
933 if (!list_empty(&req->r_linger_item))
934 __unregister_linger_request(osdc, req);
935 else
936 __unregister_request(osdc, req);
937 __register_request(osdc, req);
938 ceph_osdc_put_request(req);
939
940 /*
941 * Unless request has been registered as both normal and
942 * lingering, __unregister{,_linger}_request clears r_osd.
943 * However, here we need to preserve r_osd to make sure we
944 * requeue on the same OSD.
945 */
946 WARN_ON(req->r_osd || !osd);
947 req->r_osd = osd;
948
949 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
950 __enqueue_request(req);
951}
952
6f6c7006
SW		 953/*
954 * Resubmit requests pending on the given osd.
955 */
956static void __kick_osd_requests(struct ceph_osd_client *osdc,
957 struct ceph_osd *osd)
958{
a40c4f10 959 struct ceph_osd_request *req, *nreq;
e02493c0 960 LIST_HEAD(resend);
2cc6128a 961 LIST_HEAD(resend_linger);
6f6c7006
SW		 962 int err;
963
2cc6128a 964 dout("%s osd%d\n", __func__, osd->o_osd);
6f6c7006 965 err = __reset_osd(osdc, osd);
685a7555 966 if (err)
6f6c7006 967 return;
2cc6128a 968
e02493c0
AE		 969 /*
970 * Build up a list of requests to resend by traversing the
971 * osd's list of requests. Requests for a given object are
972 * sent in tid order, and that is also the order they're
973 * kept on this list. Therefore all requests that are in
974 * flight will be found first, followed by all requests that
975 * have not yet been sent. And to resend requests while
976 * preserving this order we will want to put any sent
977 * requests back on the front of the osd client's unsent
978 * list.
979 *
980 * So we build a separate ordered list of already-sent
981 * requests for the affected osd and splice it onto the
982 * front of the osd client's unsent list. Once we've seen a
983 * request that has not yet been sent we're done. Those
984 * requests are already sitting right where they belong.
985 */
6f6c7006 986 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 987 if (!req->r_sent)
988 break;
2cc6128a
ID		 989
990 if (!req->r_linger) {
991 dout("%s requeueing %p tid %llu\n", __func__, req,
992 req->r_tid);
993 list_move_tail(&req->r_req_lru_item, &resend);
a40c4f10 994 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2cc6128a
ID		 995 } else {
996 list_move_tail(&req->r_req_lru_item, &resend_linger);
997 }
a40c4f10 998 }
e02493c0 999 list_splice(&resend, &osdc->req_unsent);
a40c4f10 1000
e02493c0 1001 /*
2cc6128a
ID		 1002 * Both registered and not yet registered linger requests are
1003 * enqueued with a new tid on the same OSD. We add/move them
1004 * to req_unsent/o_requests at the end to keep things in tid
1005 * order.
e02493c0 1006 */
a40c4f10 1007 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1d0326b1 1008 r_linger_osd_item) {
2cc6128a
ID		 1009 WARN_ON(!list_empty(&req->r_req_lru_item));
1010 __kick_linger_request(req);
6f6c7006 1011 }
2cc6128a
ID		 1012
1013 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
1014 __kick_linger_request(req);
6f6c7006
SW		 1015}
1016
f24e9980 1017/*
81b024e7 1018 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 1019 */
1020static void osd_reset(struct ceph_connection *con)
1021{
1022 struct ceph_osd *osd = con->private;
1023 struct ceph_osd_client *osdc;
1024
1025 if (!osd)
1026 return;
1027 dout("osd_reset osd%d\n", osd->o_osd);
1028 osdc = osd->o_osdc;
f24e9980 1029 down_read(&osdc->map_sem);
83aff95e
SW		 1030 mutex_lock(&osdc->request_mutex);
1031 __kick_osd_requests(osdc, osd);
f9d25199 1032 __send_queued(osdc);
83aff95e 1033 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1034 up_read(&osdc->map_sem);
1035}
1036
1037/*
1038 * Track open sessions with osds.
1039 */
e10006f8 1040static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 1041{
1042 struct ceph_osd *osd;
1043
1044 osd = kzalloc(sizeof(*osd), GFP_NOFS);
1045 if (!osd)
1046 return NULL;
1047
1048 atomic_set(&osd->o_ref, 1);
1049 osd->o_osdc = osdc;
e10006f8 1050 osd->o_osd = onum;
f407731d 1051 RB_CLEAR_NODE(&osd->o_node);
f24e9980 1052 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 1053 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 1054 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 1055 osd->o_incarnation = 1;
1056
b7a9e5dd 1057 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 1058
422d2cb8 1059 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 1060 return osd;
1061}
1062
1063static struct ceph_osd *get_osd(struct ceph_osd *osd)
1064{
1065 if (atomic_inc_not_zero(&osd->o_ref)) {
1066 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1067 atomic_read(&osd->o_ref));
1068 return osd;
1069 } else {
1070 dout("get_osd %p FAIL\n", osd);
1071 return NULL;
1072 }
1073}
1074
1075static void put_osd(struct ceph_osd *osd)
1076{
1077 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1078 atomic_read(&osd->o_ref) - 1);
b28ec2f3 1079 if (atomic_dec_and_test(&osd->o_ref)) {
b28ec2f3 1080 if (osd->o_auth.authorizer)
6c1ea260 1081 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
f24e9980 1082 kfree(osd);
79494d1b 1083 }
f24e9980
SW		 1084}
1085
fcd00b68
ID		 1086DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1087
f24e9980
SW		 1088/*
1089 * remove an osd from our map
1090 */
f5a2041b 1091static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1092{
7eb71e03 1093 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
cc9f1f51
ID		 1094 WARN_ON(!list_empty(&osd->o_requests));
1095 WARN_ON(!list_empty(&osd->o_linger_requests));
7c6e6fc5 1096
f5a2041b 1097 list_del_init(&osd->o_osd_lru);
fcd00b68 1098 erase_osd(&osdc->osds, osd);
7eb71e03
ID		 1099}
1100
1101static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1102{
1103 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1104
1105 if (!RB_EMPTY_NODE(&osd->o_node)) {
1106 ceph_con_close(&osd->o_con);
1107 __remove_osd(osdc, osd);
1108 put_osd(osd);
1109 }
f24e9980
SW		 1110}
1111
f5a2041b
YS		 1112static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1113 struct ceph_osd *osd)
1114{
bbf37ec3 1115 dout("%s %p\n", __func__, osd);
f5a2041b 1116 BUG_ON(!list_empty(&osd->o_osd_lru));
bbf37ec3 1117
f5a2041b 1118 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
a319bf56 1119 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
f5a2041b
YS		 1120}
1121
bbf37ec3
ID		 1122static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1123 struct ceph_osd *osd)
1124{
1125 dout("%s %p\n", __func__, osd);
1126
1127 if (list_empty(&osd->o_requests) &&
1128 list_empty(&osd->o_linger_requests))
1129 __move_osd_to_lru(osdc, osd);
1130}
1131
f5a2041b
YS		 1132static void __remove_osd_from_lru(struct ceph_osd *osd)
1133{
1134 dout("__remove_osd_from_lru %p\n", osd);
1135 if (!list_empty(&osd->o_osd_lru))
1136 list_del_init(&osd->o_osd_lru);
1137}
1138
f24e9980
SW		 1139/*
1140 * reset osd connect
1141 */
f5a2041b 1142static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 1143{
c3acb181 1144 struct ceph_entity_addr *peer_addr;
f24e9980 1145
f5a2041b 1146 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 1147 if (list_empty(&osd->o_requests) &&
1148 list_empty(&osd->o_linger_requests)) {
7eb71e03 1149 remove_osd(osdc, osd);
c3acb181
AE		 1150 return -ENODEV;
1151 }
1152
1153 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1154 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1155 !ceph_con_opened(&osd->o_con)) {
1156 struct ceph_osd_request *req;
1157
0b4af2e8
ID		 1158 dout("osd addr hasn't changed and connection never opened, "
1159 "letting msgr retry\n");
87b315a5
SW		 1160 /* touch each r_stamp for handle_timeout()'s benfit */
1161 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1162 req->r_stamp = jiffies;
c3acb181
AE		 1163
1164 return -EAGAIN;
f24e9980 1165 }
c3acb181
AE		 1166
1167 ceph_con_close(&osd->o_con);
1168 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1169 osd->o_incarnation++;
1170
1171 return 0;
f24e9980
SW		 1172}
1173
422d2cb8
YS		 1174static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1175{
1176 schedule_delayed_work(&osdc->timeout_work,
a319bf56 1177 osdc->client->options->osd_keepalive_timeout);
422d2cb8
YS		 1178}
1179
1180static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1181{
1182 cancel_delayed_work(&osdc->timeout_work);
1183}
f24e9980
SW		 1184
1185/*
1186 * Register request, assign tid. If this is the first request, set up
1187 * the timeout event.
1188 */
a40c4f10
YS		 1189static void __register_request(struct ceph_osd_client *osdc,
1190 struct ceph_osd_request *req)
f24e9980 1191{
f24e9980 1192 req->r_tid = ++osdc->last_tid;
6df058c0 1193 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 1194 dout("__register_request %p tid %lld\n", req, req->r_tid);
fcd00b68 1195 insert_request(&osdc->requests, req);
f24e9980
SW		 1196 ceph_osdc_get_request(req);
1197 osdc->num_requests++;
f24e9980 1198 if (osdc->num_requests == 1) {
422d2cb8
YS		 1199 dout(" first request, scheduling timeout\n");
1200 __schedule_osd_timeout(osdc);
f24e9980 1201 }
a40c4f10
YS		 1202}
1203
f24e9980
SW		 1204/*
1205 * called under osdc->request_mutex
1206 */
1207static void __unregister_request(struct ceph_osd_client *osdc,
1208 struct ceph_osd_request *req)
1209{
35f9f8a0
SW		 1210 if (RB_EMPTY_NODE(&req->r_node)) {
1211 dout("__unregister_request %p tid %lld not registered\n",
1212 req, req->r_tid);
1213 return;
1214 }
1215
f24e9980 1216 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
fcd00b68 1217 erase_request(&osdc->requests, req);
f24e9980
SW		 1218 osdc->num_requests--;
1219
0ba6478d
SW		 1220 if (req->r_osd) {
1221 /* make sure the original request isn't in flight. */
6740a845 1222 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1223
1224 list_del_init(&req->r_osd_item);
bbf37ec3 1225 maybe_move_osd_to_lru(osdc, req->r_osd);
4f23409e 1226 if (list_empty(&req->r_linger_osd_item))
a40c4f10 1227 req->r_osd = NULL;
0ba6478d 1228 }
f24e9980 1229
7d5f2481 1230 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1231 ceph_osdc_put_request(req);
1232
422d2cb8
YS		 1233 if (osdc->num_requests == 0) {
1234 dout(" no requests, canceling timeout\n");
1235 __cancel_osd_timeout(osdc);
f24e9980
SW		 1236 }
1237}
1238
1239/*
1240 * Cancel a previously queued request message
1241 */
1242static void __cancel_request(struct ceph_osd_request *req)
1243{
6bc18876 1244 if (req->r_sent && req->r_osd) {
6740a845 1245 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1246 req->r_sent = 0;
1247 }
1248}
1249
a40c4f10
YS		 1250static void __register_linger_request(struct ceph_osd_client *osdc,
1251 struct ceph_osd_request *req)
1252{
af593064
ID		 1253 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1254 WARN_ON(!req->r_linger);
1255
96e4dac6 1256 ceph_osdc_get_request(req);
a40c4f10 1257 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89 1258 if (req->r_osd)
1d0326b1 1259 list_add_tail(&req->r_linger_osd_item,
6194ea89 1260 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1261}
1262
1263static void __unregister_linger_request(struct ceph_osd_client *osdc,
1264 struct ceph_osd_request *req)
1265{
af593064
ID		 1266 WARN_ON(!req->r_linger);
1267
1268 if (list_empty(&req->r_linger_item)) {
1269 dout("%s %p tid %llu not registered\n", __func__, req,
1270 req->r_tid);
1271 return;
1272 }
1273
1274 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
61c74035 1275 list_del_init(&req->r_linger_item);
af593064 1276
a40c4f10 1277 if (req->r_osd) {
1d0326b1 1278 list_del_init(&req->r_linger_osd_item);
bbf37ec3 1279 maybe_move_osd_to_lru(osdc, req->r_osd);
fbdb9190
SW		 1280 if (list_empty(&req->r_osd_item))
1281 req->r_osd = NULL;
a40c4f10 1282 }
96e4dac6 1283 ceph_osdc_put_request(req);
a40c4f10
YS		 1284}
1285
a40c4f10
YS		 1286void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1287 struct ceph_osd_request *req)
1288{
1289 if (!req->r_linger) {
1290 dout("set_request_linger %p\n", req);
1291 req->r_linger = 1;
a40c4f10
YS		 1292 }
1293}
1294EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1295
63244fa1
ID		 1296static bool __pool_full(struct ceph_pg_pool_info *pi)
1297{
1298 return pi->flags & CEPH_POOL_FLAG_FULL;
1299}
1300
d29adb34
JD		 1301/*
1302 * Returns whether a request should be blocked from being sent
1303 * based on the current osdmap and osd_client settings.
1304 *
1305 * Caller should hold map_sem for read.
1306 */
63244fa1
ID		 1307static bool target_should_be_paused(struct ceph_osd_client *osdc,
1308 const struct ceph_osd_request_target *t,
1309 struct ceph_pg_pool_info *pi)
1310{
1311 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1312 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1313 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
1314 __pool_full(pi);
1315
1316 WARN_ON(pi->id != t->base_oloc.pool);
1317 return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
1318 (t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
1319}
1320
63244fa1
ID		 1321enum calc_target_result {
1322 CALC_TARGET_NO_ACTION = 0,
1323 CALC_TARGET_NEED_RESEND,
1324 CALC_TARGET_POOL_DNE,
1325};
1326
1327static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1328 struct ceph_osd_request_target *t,
1329 u32 *last_force_resend,
1330 bool any_change)
1331{
1332 struct ceph_pg_pool_info *pi;
1333 struct ceph_pg pgid, last_pgid;
1334 struct ceph_osds up, acting;
1335 bool force_resend = false;
1336 bool need_check_tiering = false;
1337 bool need_resend = false;
1338 bool sort_bitwise = ceph_osdmap_flag(osdc->osdmap,
1339 CEPH_OSDMAP_SORTBITWISE);
1340 enum calc_target_result ct_res;
1341 int ret;
1342
1343 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1344 if (!pi) {
1345 t->osd = CEPH_HOMELESS_OSD;
1346 ct_res = CALC_TARGET_POOL_DNE;
1347 goto out;
1348 }
1349
1350 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1351 if (last_force_resend &&
1352 *last_force_resend < pi->last_force_request_resend) {
1353 *last_force_resend = pi->last_force_request_resend;
1354 force_resend = true;
1355 } else if (!last_force_resend) {
1356 force_resend = true;
1357 }
1358 }
1359 if (ceph_oid_empty(&t->target_oid) || force_resend) {
1360 ceph_oid_copy(&t->target_oid, &t->base_oid);
1361 need_check_tiering = true;
1362 }
1363 if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
1364 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1365 need_check_tiering = true;
1366 }
1367
1368 if (need_check_tiering &&
1369 (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1370 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1371 t->target_oloc.pool = pi->read_tier;
1372 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1373 t->target_oloc.pool = pi->write_tier;
1374 }
1375
1376 ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
1377 &t->target_oloc, &pgid);
1378 if (ret) {
1379 WARN_ON(ret != -ENOENT);
1380 t->osd = CEPH_HOMELESS_OSD;
1381 ct_res = CALC_TARGET_POOL_DNE;
1382 goto out;
1383 }
1384 last_pgid.pool = pgid.pool;
1385 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1386
1387 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
1388 if (any_change &&
1389 ceph_is_new_interval(&t->acting,
1390 &acting,
1391 &t->up,
1392 &up,
1393 t->size,
1394 pi->size,
1395 t->min_size,
1396 pi->min_size,
1397 t->pg_num,
1398 pi->pg_num,
1399 t->sort_bitwise,
1400 sort_bitwise,
1401 &last_pgid))
1402 force_resend = true;
1403
1404 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1405 t->paused = false;
1406 need_resend = true;
1407 }
1408
1409 if (ceph_pg_compare(&t->pgid, &pgid) ||
1410 ceph_osds_changed(&t->acting, &acting, any_change) ||
1411 force_resend) {
1412 t->pgid = pgid; /* struct */
1413 ceph_osds_copy(&t->acting, &acting);
1414 ceph_osds_copy(&t->up, &up);
1415 t->size = pi->size;
1416 t->min_size = pi->min_size;
1417 t->pg_num = pi->pg_num;
1418 t->pg_num_mask = pi->pg_num_mask;
1419 t->sort_bitwise = sort_bitwise;
1420
1421 t->osd = acting.primary;
1422 need_resend = true;
1423 }
1424
1425 ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION;
1426out:
1427 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
1428 return ct_res;
1429}
1430
f671b581
ID		 1431static void __enqueue_request(struct ceph_osd_request *req)
1432{
1433 struct ceph_osd_client *osdc = req->r_osdc;
1434
1435 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1436 req->r_osd ? req->r_osd->o_osd : -1);
1437
1438 if (req->r_osd) {
1439 __remove_osd_from_lru(req->r_osd);
1440 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1441 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1442 } else {
1443 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1444 }
1445}
1446
f24e9980
SW		 1447/*
1448 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1449 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1450 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1451 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1452 *
1453 * Return 0 if unchanged, 1 if changed, or negative on error.
1454 *
1455 * Caller should hold map_sem for read and request_mutex.
1456 */
6f6c7006 1457static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1458 struct ceph_osd_request *req, int force_resend)
f24e9980 1459{
a66dd383 1460 enum calc_target_result ct_res;
f24e9980 1461 int err;
f24e9980 1462
6f6c7006 1463 dout("map_request %p tid %lld\n", req, req->r_tid);
17a13e40 1464
a66dd383
ID		 1465 ct_res = calc_target(osdc, &req->r_t, NULL, force_resend);
1466 switch (ct_res) {
1467 case CALC_TARGET_POOL_DNE:
6f6c7006 1468 list_move(&req->r_req_lru_item, &osdc->req_notarget);
a66dd383
ID		 1469 return -EIO;
1470 case CALC_TARGET_NO_ACTION:
f24e9980 1471 return 0; /* no change */
a66dd383
ID		 1472 default:
1473 BUG_ON(ct_res != CALC_TARGET_NEED_RESEND);
1474 }
f24e9980 1475
5b191d99 1476 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
a66dd383 1477 req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, req->r_t.osd,
f24e9980
SW		 1478 req->r_osd ? req->r_osd->o_osd : -1);
1479
1480 if (req->r_osd) {
1481 __cancel_request(req);
1482 list_del_init(&req->r_osd_item);
a390de02 1483 list_del_init(&req->r_linger_osd_item);
f24e9980
SW		 1484 req->r_osd = NULL;
1485 }
1486
a66dd383
ID		 1487 req->r_osd = lookup_osd(&osdc->osds, req->r_t.osd);
1488 if (!req->r_osd && req->r_t.osd >= 0) {
c99eb1c7 1489 err = -ENOMEM;
a66dd383 1490 req->r_osd = create_osd(osdc, req->r_t.osd);
6f6c7006
SW		 1491 if (!req->r_osd) {
1492 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1493 goto out;
6f6c7006 1494 }
f24e9980 1495
6f3bfd45 1496 dout("map_request osd %p is osd%d\n", req->r_osd,
a66dd383 1497 req->r_osd->o_osd);
fcd00b68 1498 insert_osd(&osdc->osds, req->r_osd);
f24e9980 1499
b7a9e5dd 1500 ceph_con_open(&req->r_osd->o_con,
a66dd383
ID		 1501 CEPH_ENTITY_TYPE_OSD, req->r_osd->o_osd,
1502 &osdc->osdmap->osd_addr[req->r_osd->o_osd]);
f24e9980
SW		 1503 }
1504
f671b581 1505 __enqueue_request(req);
d85b7056 1506 err = 1; /* osd or pg changed */
f24e9980
SW		 1507
1508out:
f24e9980
SW		 1509 return err;
1510}
1511
1512/*
1513 * caller should hold map_sem (for read) and request_mutex
1514 */
56e925b6
SW		 1515static void __send_request(struct ceph_osd_client *osdc,
1516 struct ceph_osd_request *req)
f24e9980 1517{
1b83bef2 1518 void *p;
f24e9980 1519
1b83bef2
SW		 1520 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1521 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
a66dd383 1522 req->r_t.pgid.pool, req->r_t.pgid.seed);
1b83bef2
SW		 1523
1524 /* fill in message content that changes each time we send it */
1525 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1526 put_unaligned_le32(req->r_flags, req->r_request_flags);
a66dd383 1527 put_unaligned_le64(req->r_t.target_oloc.pool, req->r_request_pool);
1b83bef2 1528 p = req->r_request_pgid;
a66dd383
ID		 1529 ceph_encode_64(&p, req->r_t.pgid.pool);
1530 ceph_encode_32(&p, req->r_t.pgid.seed);
1b83bef2
SW		 1531 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1532 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1533 sizeof(req->r_reassert_version));
2169aea6 1534
3dd72fc0 1535 req->r_stamp = jiffies;
07a27e22 1536 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1537
1538 ceph_msg_get(req->r_request); /* send consumes a ref */
26be8808 1539
f24e9980 1540 req->r_sent = req->r_osd->o_incarnation;
26be8808
AE		 1541
1542 ceph_con_send(&req->r_osd->o_con, req->r_request);
f24e9980
SW		 1543}
1544
6f6c7006
SW		 1545/*
1546 * Send any requests in the queue (req_unsent).
1547 */
f9d25199 1548static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1549{
1550 struct ceph_osd_request *req, *tmp;
1551
f9d25199
AE		 1552 dout("__send_queued\n");
1553 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1554 __send_request(osdc, req);
6f6c7006
SW		 1555}
1556
0bbfdfe8
ID		 1557/*
1558 * Caller should hold map_sem for read and request_mutex.
1559 */
1560static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1561 struct ceph_osd_request *req,
1562 bool nofail)
1563{
1564 int rc;
1565
1566 __register_request(osdc, req);
1567 req->r_sent = 0;
1568 req->r_got_reply = 0;
1569 rc = __map_request(osdc, req, 0);
1570 if (rc < 0) {
1571 if (nofail) {
1572 dout("osdc_start_request failed map, "
1573 " will retry %lld\n", req->r_tid);
1574 rc = 0;
1575 } else {
1576 __unregister_request(osdc, req);
1577 }
1578 return rc;
1579 }
1580
1581 if (req->r_osd == NULL) {
1582 dout("send_request %p no up osds in pg\n", req);
1583 ceph_monc_request_next_osdmap(&osdc->client->monc);
1584 } else {
1585 __send_queued(osdc);
1586 }
1587
1588 return 0;
1589}
1590
f24e9980
SW		 1591/*
1592 * Timeout callback, called every N seconds when 1 or more osd
1593 * requests has been active for more than N seconds. When this
1594 * happens, we ping all OSDs with requests who have timed out to
1595 * ensure any communications channel reset is detected. Reset the
1596 * request timeouts another N seconds in the future as we go.
1597 * Reschedule the timeout event another N seconds in future (unless
1598 * there are no open requests).
1599 */
1600static void handle_timeout(struct work_struct *work)
1601{
1602 struct ceph_osd_client *osdc =
1603 container_of(work, struct ceph_osd_client, timeout_work.work);
a319bf56 1604 struct ceph_options *opts = osdc->client->options;
83aff95e 1605 struct ceph_osd_request *req;
f24e9980 1606 struct ceph_osd *osd;
422d2cb8 1607 struct list_head slow_osds;
f24e9980
SW		 1608 dout("timeout\n");
1609 down_read(&osdc->map_sem);
1610
1611 ceph_monc_request_next_osdmap(&osdc->client->monc);
1612
1613 mutex_lock(&osdc->request_mutex);
f24e9980 1614
422d2cb8
YS		 1615 /*
1616 * ping osds that are a bit slow. this ensures that if there
1617 * is a break in the TCP connection we will notice, and reopen
1618 * a connection with that osd (from the fault callback).
1619 */
1620 INIT_LIST_HEAD(&slow_osds);
1621 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
a319bf56
ID		 1622 if (time_before(jiffies,
1623 req->r_stamp + opts->osd_keepalive_timeout))
422d2cb8
YS		 1624 break;
1625
1626 osd = req->r_osd;
1627 BUG_ON(!osd);
1628 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1629 req->r_tid, osd->o_osd);
422d2cb8
YS		 1630 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1631 }
1632 while (!list_empty(&slow_osds)) {
1633 osd = list_entry(slow_osds.next, struct ceph_osd,
1634 o_keepalive_item);
1635 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1636 ceph_con_keepalive(&osd->o_con);
1637 }
1638
422d2cb8 1639 __schedule_osd_timeout(osdc);
f9d25199 1640 __send_queued(osdc);
f24e9980 1641 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1642 up_read(&osdc->map_sem);
1643}
1644
f5a2041b
YS		 1645static void handle_osds_timeout(struct work_struct *work)
1646{
1647 struct ceph_osd_client *osdc =
1648 container_of(work, struct ceph_osd_client,
1649 osds_timeout_work.work);
a319bf56 1650 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
42a2c09f 1651 struct ceph_osd *osd, *nosd;
f5a2041b 1652
42a2c09f 1653 dout("%s osdc %p\n", __func__, osdc);
f5a2041b 1654 down_read(&osdc->map_sem);
42a2c09f
ID		 1655 mutex_lock(&osdc->request_mutex);
1656
1657 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1658 if (time_before(jiffies, osd->lru_ttl))
1659 break;
1660
1661 remove_osd(osdc, osd);
1662 }
f5a2041b 1663
42a2c09f
ID		 1664 mutex_unlock(&osdc->request_mutex);
1665 up_read(&osdc->map_sem);
f5a2041b
YS		 1666 schedule_delayed_work(&osdc->osds_timeout_work,
1667 round_jiffies_relative(delay));
1668}
1669
205ee118
ID		 1670static int ceph_oloc_decode(void **p, void *end,
1671 struct ceph_object_locator *oloc)
1672{
1673 u8 struct_v, struct_cv;
1674 u32 len;
1675 void *struct_end;
1676 int ret = 0;
1677
1678 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1679 struct_v = ceph_decode_8(p);
1680 struct_cv = ceph_decode_8(p);
1681 if (struct_v < 3) {
1682 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1683 struct_v, struct_cv);
1684 goto e_inval;
1685 }
1686 if (struct_cv > 6) {
1687 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1688 struct_v, struct_cv);
1689 goto e_inval;
1690 }
1691 len = ceph_decode_32(p);
1692 ceph_decode_need(p, end, len, e_inval);
1693 struct_end = *p + len;
1694
1695 oloc->pool = ceph_decode_64(p);
1696 *p += 4; /* skip preferred */
1697
1698 len = ceph_decode_32(p);
1699 if (len > 0) {
1700 pr_warn("ceph_object_locator::key is set\n");
1701 goto e_inval;
1702 }
1703
1704 if (struct_v >= 5) {
1705 len = ceph_decode_32(p);
1706 if (len > 0) {
1707 pr_warn("ceph_object_locator::nspace is set\n");
1708 goto e_inval;
1709 }
1710 }
1711
1712 if (struct_v >= 6) {
1713 s64 hash = ceph_decode_64(p);
1714 if (hash != -1) {
1715 pr_warn("ceph_object_locator::hash is set\n");
1716 goto e_inval;
1717 }
1718 }
1719
1720 /* skip the rest */
1721 *p = struct_end;
1722out:
1723 return ret;
1724
1725e_inval:
1726 ret = -EINVAL;
1727 goto out;
1728}
1729
1730static int ceph_redirect_decode(void **p, void *end,
1731 struct ceph_request_redirect *redir)
1732{
1733 u8 struct_v, struct_cv;
1734 u32 len;
1735 void *struct_end;
1736 int ret;
1737
1738 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1739 struct_v = ceph_decode_8(p);
1740 struct_cv = ceph_decode_8(p);
1741 if (struct_cv > 1) {
1742 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1743 struct_v, struct_cv);
1744 goto e_inval;
1745 }
1746 len = ceph_decode_32(p);
1747 ceph_decode_need(p, end, len, e_inval);
1748 struct_end = *p + len;
1749
1750 ret = ceph_oloc_decode(p, end, &redir->oloc);
1751 if (ret)
1752 goto out;
1753
1754 len = ceph_decode_32(p);
1755 if (len > 0) {
1756 pr_warn("ceph_request_redirect::object_name is set\n");
1757 goto e_inval;
1758 }
1759
1760 len = ceph_decode_32(p);
1761 *p += len; /* skip osd_instructions */
1762
1763 /* skip the rest */
1764 *p = struct_end;
1765out:
1766 return ret;
1767
1768e_inval:
1769 ret = -EINVAL;
1770 goto out;
1771}
1772
25845472
SW		 1773static void complete_request(struct ceph_osd_request *req)
1774{
25845472
SW		 1775 complete_all(&req->r_safe_completion); /* fsync waiter */
1776}
1777
f24e9980
SW		 1778/*
1779 * handle osd op reply. either call the callback if it is specified,
1780 * or do the completion to wake up the waiting thread.
1781 */
70cf052d 1782static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg)
f24e9980 1783{
1b83bef2 1784 void *p, *end;
f24e9980 1785 struct ceph_osd_request *req;
205ee118 1786 struct ceph_request_redirect redir;
f24e9980 1787 u64 tid;
1b83bef2 1788 int object_len;
79528734
AE		 1789 unsigned int numops;
1790 int payload_len, flags;
0ceed5db 1791 s32 result;
1b83bef2
SW		 1792 s32 retry_attempt;
1793 struct ceph_pg pg;
1794 int err;
1795 u32 reassert_epoch;
1796 u64 reassert_version;
1797 u32 osdmap_epoch;
0d5af164 1798 int already_completed;
9fc6e064 1799 u32 bytes;
b0b31a8f 1800 u8 decode_redir;
79528734 1801 unsigned int i;
f24e9980 1802
6df058c0 1803 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1804 dout("handle_reply %p tid %llu\n", msg, tid);
1805
1806 p = msg->front.iov_base;
1807 end = p + msg->front.iov_len;
1808
1809 ceph_decode_need(&p, end, 4, bad);
1810 object_len = ceph_decode_32(&p);
1811 ceph_decode_need(&p, end, object_len, bad);
1812 p += object_len;
1813
ef4859d6 1814 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1815 if (err)
f24e9980 1816 goto bad;
1b83bef2
SW		 1817
1818 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1819 flags = ceph_decode_64(&p);
1820 result = ceph_decode_32(&p);
1821 reassert_epoch = ceph_decode_32(&p);
1822 reassert_version = ceph_decode_64(&p);
1823 osdmap_epoch = ceph_decode_32(&p);
1824
f24e9980 1825 /* lookup */
ff513ace 1826 down_read(&osdc->map_sem);
f24e9980 1827 mutex_lock(&osdc->request_mutex);
fcd00b68 1828 req = lookup_request(&osdc->requests, tid);
f24e9980
SW		 1829 if (req == NULL) {
1830 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1831 goto bad_mutex;
f24e9980
SW		 1832 }
1833 ceph_osdc_get_request(req);
1b83bef2
SW		 1834
1835 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1836 req, result);
1837
18741196 1838 ceph_decode_need(&p, end, 4, bad_put);
1b83bef2 1839 numops = ceph_decode_32(&p);
3f1af42a 1840 if (numops > CEPH_OSD_MAX_OPS)
1b83bef2
SW		 1841 goto bad_put;
1842 if (numops != req->r_num_ops)
1843 goto bad_put;
1844 payload_len = 0;
18741196 1845 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1b83bef2
SW		 1846 for (i = 0; i < numops; i++) {
1847 struct ceph_osd_op *op = p;
1848 int len;
1849
1850 len = le32_to_cpu(op->payload_len);
7665d85b 1851 req->r_ops[i].outdata_len = len;
1b83bef2
SW		 1852 dout(" op %d has %d bytes\n", i, len);
1853 payload_len += len;
1854 p += sizeof(*op);
1855 }
9fc6e064
AE		 1856 bytes = le32_to_cpu(msg->hdr.data_len);
1857 if (payload_len != bytes) {
b9a67899
JP		 1858 pr_warn("sum of op payload lens %d != data_len %d\n",
1859 payload_len, bytes);
1b83bef2
SW		 1860 goto bad_put;
1861 }
1862
18741196 1863 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1b83bef2
SW		 1864 retry_attempt = ceph_decode_32(&p);
1865 for (i = 0; i < numops; i++)
7665d85b 1866 req->r_ops[i].rval = ceph_decode_32(&p);
f24e9980 1867
205ee118
ID		 1868 if (le16_to_cpu(msg->hdr.version) >= 6) {
1869 p += 8 + 4; /* skip replay_version */
1870 p += 8; /* skip user_version */
eb845ff1 1871
b0b31a8f
ID		 1872 if (le16_to_cpu(msg->hdr.version) >= 7)
1873 ceph_decode_8_safe(&p, end, decode_redir, bad_put);
1874 else
1875 decode_redir = 1;
1876 } else {
1877 decode_redir = 0;
1878 }
1879
1880 if (decode_redir) {
205ee118
ID		 1881 err = ceph_redirect_decode(&p, end, &redir);
1882 if (err)
1883 goto bad_put;
1884 } else {
1885 redir.oloc.pool = -1;
1886 }
f24e9980 1887
63244fa1 1888 if (!ceph_oloc_empty(&redir.oloc)) {
205ee118
ID		 1889 dout("redirect pool %lld\n", redir.oloc.pool);
1890
1891 __unregister_request(osdc, req);
205ee118 1892
a66dd383 1893 ceph_oloc_copy(&req->r_t.target_oloc, &redir.oloc);
205ee118
ID		 1894
1895 /*
1896 * Start redirect requests with nofail=true. If
1897 * mapping fails, request will end up on the notarget
1898 * list, waiting for the new osdmap (which can take
1899 * a while), even though the original request mapped
1900 * successfully. In the future we might want to follow
1901 * original request's nofail setting here.
1902 */
ff513ace 1903 err = __ceph_osdc_start_request(osdc, req, true);
205ee118
ID		 1904 BUG_ON(err);
1905
ff513ace 1906 goto out_unlock;
205ee118
ID		 1907 }
1908
1909 already_completed = req->r_got_reply;
1910 if (!req->r_got_reply) {
1b83bef2 1911 req->r_result = result;
f24e9980
SW		 1912 dout("handle_reply result %d bytes %d\n", req->r_result,
1913 bytes);
1914 if (req->r_result == 0)
1915 req->r_result = bytes;
1916
1917 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1918 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1919 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1920
1921 req->r_got_reply = 1;
1922 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1923 dout("handle_reply tid %llu dup ack\n", tid);
ff513ace 1924 goto out_unlock;
f24e9980
SW		 1925 }
1926
1927 dout("handle_reply tid %llu flags %d\n", tid, flags);
1928
a40c4f10
YS		 1929 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1930 __register_linger_request(osdc, req);
1931
f24e9980 1932 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1933 if (result < 0 ||
1934 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1935 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1936 __unregister_request(osdc, req);
1937
1938 mutex_unlock(&osdc->request_mutex);
ff513ace 1939 up_read(&osdc->map_sem);
f24e9980 1940
eb845ff1 1941 if (!already_completed) {
61c5d6bf
YZ		 1942 if (req->r_unsafe_callback &&
1943 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1944 req->r_unsafe_callback(req, true);
eb845ff1
YZ		 1945 if (req->r_callback)
1946 req->r_callback(req, msg);
1947 else
1948 complete_all(&req->r_completion);
1949 }
f24e9980 1950
61c5d6bf
YZ		 1951 if (flags & CEPH_OSD_FLAG_ONDISK) {
1952 if (req->r_unsafe_callback && already_completed)
1953 req->r_unsafe_callback(req, false);
25845472 1954 complete_request(req);
61c5d6bf 1955 }
f24e9980 1956
ff513ace 1957out:
a40c4f10 1958 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1959 ceph_osdc_put_request(req);
1960 return;
ff513ace
ID		 1961out_unlock:
1962 mutex_unlock(&osdc->request_mutex);
1963 up_read(&osdc->map_sem);
1964 goto out;
f24e9980 1965
1b83bef2 1966bad_put:
37c89bde
LW		 1967 req->r_result = -EIO;
1968 __unregister_request(osdc, req);
1969 if (req->r_callback)
1970 req->r_callback(req, msg);
1971 else
1972 complete_all(&req->r_completion);
1973 complete_request(req);
1b83bef2 1974 ceph_osdc_put_request(req);
8058fd45
AE		 1975bad_mutex:
1976 mutex_unlock(&osdc->request_mutex);
ff513ace 1977 up_read(&osdc->map_sem);
f24e9980 1978bad:
1b83bef2
SW		 1979 pr_err("corrupt osd_op_reply got %d %d\n",
1980 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1981 ceph_msg_dump(msg);
f24e9980
SW		 1982}
1983
6f6c7006 1984static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1985{
f24e9980 1986 struct rb_node *p, *n;
f24e9980 1987
7eb71e03 1988 dout("%s %p\n", __func__, osdc);
6f6c7006
SW		 1989 for (p = rb_first(&osdc->osds); p; p = n) {
1990 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1991
6f6c7006
SW		 1992 n = rb_next(p);
1993 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1994 memcmp(&osd->o_con.peer_addr,
1995 ceph_osd_addr(osdc->osdmap,
1996 osd->o_osd),
1997 sizeof(struct ceph_entity_addr)) != 0)
1998 __reset_osd(osdc, osd);
f24e9980 1999 }
422d2cb8
YS		 2000}
2001
2002/*
6f6c7006
SW		 2003 * Requeue requests whose mapping to an OSD has changed. If requests map to
2004 * no osd, request a new map.
422d2cb8 2005 *
e6d50f67 2006 * Caller should hold map_sem for read.
422d2cb8 2007 */
9a1ea2db
JD		 2008static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
2009 bool force_resend_writes)
422d2cb8 2010{
a40c4f10 2011 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 2012 struct rb_node *p;
2013 int needmap = 0;
2014 int err;
9a1ea2db 2015 bool force_resend_req;
422d2cb8 2016
9a1ea2db
JD		 2017 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
2018 force_resend_writes ? " (force resend writes)" : "");
422d2cb8 2019 mutex_lock(&osdc->request_mutex);
6194ea89 2020 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 2021 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 2022 p = rb_next(p);
ab60b16d
AE		 2023
2024 /*
2025 * For linger requests that have not yet been
2026 * registered, move them to the linger list; they'll
2027 * be sent to the osd in the loop below. Unregister
2028 * the request before re-registering it as a linger
2029 * request to ensure the __map_request() below
2030 * will decide it needs to be sent.
2031 */
2032 if (req->r_linger && list_empty(&req->r_linger_item)) {
2033 dout("%p tid %llu restart on osd%d\n",
2034 req, req->r_tid,
2035 req->r_osd ? req->r_osd->o_osd : -1);
96e4dac6 2036 ceph_osdc_get_request(req);
ab60b16d
AE		 2037 __unregister_request(osdc, req);
2038 __register_linger_request(osdc, req);
96e4dac6 2039 ceph_osdc_put_request(req);
ab60b16d
AE		 2040 continue;
2041 }
2042
9a1ea2db
JD		 2043 force_resend_req = force_resend ||
2044 (force_resend_writes &&
2045 req->r_flags & CEPH_OSD_FLAG_WRITE);
2046 err = __map_request(osdc, req, force_resend_req);
6f6c7006
SW		 2047 if (err < 0)
2048 continue; /* error */
2049 if (req->r_osd == NULL) {
2050 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
2051 needmap++; /* request a newer map */
2052 } else if (err > 0) {
6194ea89
SW		 2053 if (!req->r_linger) {
2054 dout("%p tid %llu requeued on osd%d\n", req,
2055 req->r_tid,
2056 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 2057 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 2058 }
2059 }
a40c4f10
YS		 2060 }
2061
2062 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
2063 r_linger_item) {
2064 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
2065
9a1ea2db
JD		 2066 err = __map_request(osdc, req,
2067 force_resend || force_resend_writes);
ab60b16d 2068 dout("__map_request returned %d\n", err);
a40c4f10
YS		 2069 if (err < 0)
2070 continue; /* hrm! */
b0494532
ID		 2071 if (req->r_osd == NULL || err > 0) {
2072 if (req->r_osd == NULL) {
2073 dout("lingering %p tid %llu maps to no osd\n",
2074 req, req->r_tid);
2075 /*
2076 * A homeless lingering request makes
2077 * no sense, as it's job is to keep
2078 * a particular OSD connection open.
2079 * Request a newer map and kick the
2080 * request, knowing that it won't be
2081 * resent until we actually get a map
2082 * that can tell us where to send it.
2083 */
2084 needmap++;
2085 }
a40c4f10 2086
b0494532
ID		 2087 dout("kicking lingering %p tid %llu osd%d\n", req,
2088 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1);
2089 __register_request(osdc, req);
2090 __unregister_linger_request(osdc, req);
2091 }
6f6c7006 2092 }
14d2f38d 2093 reset_changed_osds(osdc);
f24e9980
SW		 2094 mutex_unlock(&osdc->request_mutex);
2095
2096 if (needmap) {
2097 dout("%d requests for down osds, need new map\n", needmap);
2098 ceph_monc_request_next_osdmap(&osdc->client->monc);
2099 }
422d2cb8 2100}
6f6c7006
SW		 2101
2102
f24e9980
SW		 2103/*
2104 * Process updated osd map.
2105 *
2106 * The message contains any number of incremental and full maps, normally
2107 * indicating some sort of topology change in the cluster. Kick requests
2108 * off to different OSDs as needed.
2109 */
2110void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2111{
2112 void *p, *end, *next;
2113 u32 nr_maps, maplen;
2114 u32 epoch;
2115 struct ceph_osdmap *newmap = NULL, *oldmap;
2116 int err;
2117 struct ceph_fsid fsid;
9a1ea2db 2118 bool was_full;
f24e9980
SW		 2119
2120 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2121 p = msg->front.iov_base;
2122 end = p + msg->front.iov_len;
2123
2124 /* verify fsid */
2125 ceph_decode_need(&p, end, sizeof(fsid), bad);
2126 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 2127 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2128 return;
f24e9980
SW		 2129
2130 down_write(&osdc->map_sem);
2131
9a1ea2db
JD		 2132 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2133
f24e9980
SW		 2134 /* incremental maps */
2135 ceph_decode_32_safe(&p, end, nr_maps, bad);
2136 dout(" %d inc maps\n", nr_maps);
2137 while (nr_maps > 0) {
2138 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2139 epoch = ceph_decode_32(&p);
2140 maplen = ceph_decode_32(&p);
f24e9980
SW		 2141 ceph_decode_need(&p, end, maplen, bad);
2142 next = p + maplen;
2143 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2144 dout("applying incremental map %u len %d\n",
2145 epoch, maplen);
2146 newmap = osdmap_apply_incremental(&p, next,
0c0a8de1 2147 osdc->osdmap);
f24e9980
SW		 2148 if (IS_ERR(newmap)) {
2149 err = PTR_ERR(newmap);
2150 goto bad;
2151 }
30dc6381 2152 BUG_ON(!newmap);
f24e9980
SW		 2153 if (newmap != osdc->osdmap) {
2154 ceph_osdmap_destroy(osdc->osdmap);
2155 osdc->osdmap = newmap;
2156 }
9a1ea2db
JD		 2157 was_full = was_full ||
2158 ceph_osdmap_flag(osdc->osdmap,
2159 CEPH_OSDMAP_FULL);
2160 kick_requests(osdc, 0, was_full);
f24e9980
SW		 2161 } else {
2162 dout("ignoring incremental map %u len %d\n",
2163 epoch, maplen);
2164 }
2165 p = next;
2166 nr_maps--;
2167 }
2168 if (newmap)
2169 goto done;
2170
2171 /* full maps */
2172 ceph_decode_32_safe(&p, end, nr_maps, bad);
2173 dout(" %d full maps\n", nr_maps);
2174 while (nr_maps) {
2175 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 2176 epoch = ceph_decode_32(&p);
2177 maplen = ceph_decode_32(&p);
f24e9980
SW		 2178 ceph_decode_need(&p, end, maplen, bad);
2179 if (nr_maps > 1) {
2180 dout("skipping non-latest full map %u len %d\n",
2181 epoch, maplen);
2182 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2183 dout("skipping full map %u len %d, "
2184 "older than our %u\n", epoch, maplen,
2185 osdc->osdmap->epoch);
2186 } else {
38d6453c
SW		 2187 int skipped_map = 0;
2188
f24e9980 2189 dout("taking full map %u len %d\n", epoch, maplen);
a2505d63 2190 newmap = ceph_osdmap_decode(&p, p+maplen);
f24e9980
SW		 2191 if (IS_ERR(newmap)) {
2192 err = PTR_ERR(newmap);
2193 goto bad;
2194 }
30dc6381 2195 BUG_ON(!newmap);
f24e9980
SW		 2196 oldmap = osdc->osdmap;
2197 osdc->osdmap = newmap;
38d6453c
SW		 2198 if (oldmap) {
2199 if (oldmap->epoch + 1 < newmap->epoch)
2200 skipped_map = 1;
f24e9980 2201 ceph_osdmap_destroy(oldmap);
38d6453c 2202 }
9a1ea2db
JD		 2203 was_full = was_full ||
2204 ceph_osdmap_flag(osdc->osdmap,
2205 CEPH_OSDMAP_FULL);
2206 kick_requests(osdc, skipped_map, was_full);
f24e9980
SW		 2207 }
2208 p += maplen;
2209 nr_maps--;
2210 }
2211
b72e19b9
DC		 2212 if (!osdc->osdmap)
2213 goto bad;
f24e9980
SW		 2214done:
2215 downgrade_write(&osdc->map_sem);
82dcabad
ID		 2216 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2217 osdc->osdmap->epoch);
cd634fb6
SW		 2218
2219 /*
2220 * subscribe to subsequent osdmap updates if full to ensure
2221 * we find out when we are no longer full and stop returning
2222 * ENOSPC.
2223 */
d29adb34
JD		 2224 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2225 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2226 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
cd634fb6
SW		 2227 ceph_monc_request_next_osdmap(&osdc->client->monc);
2228
f9d25199
AE		 2229 mutex_lock(&osdc->request_mutex);
2230 __send_queued(osdc);
2231 mutex_unlock(&osdc->request_mutex);
f24e9980 2232 up_read(&osdc->map_sem);
03066f23 2233 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 2234 return;
2235
2236bad:
2237 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 2238 ceph_msg_dump(msg);
f24e9980 2239 up_write(&osdc->map_sem);
f24e9980
SW		 2240}
2241
a40c4f10
YS		 2242/*
2243 * watch/notify callback event infrastructure
2244 *
2245 * These callbacks are used both for watch and notify operations.
2246 */
2247static void __release_event(struct kref *kref)
2248{
2249 struct ceph_osd_event *event =
2250 container_of(kref, struct ceph_osd_event, kref);
2251
2252 dout("__release_event %p\n", event);
2253 kfree(event);
2254}
2255
2256static void get_event(struct ceph_osd_event *event)
2257{
2258 kref_get(&event->kref);
2259}
2260
2261void ceph_osdc_put_event(struct ceph_osd_event *event)
2262{
2263 kref_put(&event->kref, __release_event);
2264}
2265EXPORT_SYMBOL(ceph_osdc_put_event);
2266
2267static void __insert_event(struct ceph_osd_client *osdc,
2268 struct ceph_osd_event *new)
2269{
2270 struct rb_node **p = &osdc->event_tree.rb_node;
2271 struct rb_node *parent = NULL;
2272 struct ceph_osd_event *event = NULL;
2273
2274 while (*p) {
2275 parent = *p;
2276 event = rb_entry(parent, struct ceph_osd_event, node);
2277 if (new->cookie < event->cookie)
2278 p = &(*p)->rb_left;
2279 else if (new->cookie > event->cookie)
2280 p = &(*p)->rb_right;
2281 else
2282 BUG();
2283 }
2284
2285 rb_link_node(&new->node, parent, p);
2286 rb_insert_color(&new->node, &osdc->event_tree);
2287}
2288
2289static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2290 u64 cookie)
2291{
2292 struct rb_node **p = &osdc->event_tree.rb_node;
2293 struct rb_node *parent = NULL;
2294 struct ceph_osd_event *event = NULL;
2295
2296 while (*p) {
2297 parent = *p;
2298 event = rb_entry(parent, struct ceph_osd_event, node);
2299 if (cookie < event->cookie)
2300 p = &(*p)->rb_left;
2301 else if (cookie > event->cookie)
2302 p = &(*p)->rb_right;
2303 else
2304 return event;
2305 }
2306 return NULL;
2307}
2308
2309static void __remove_event(struct ceph_osd_event *event)
2310{
2311 struct ceph_osd_client *osdc = event->osdc;
2312
2313 if (!RB_EMPTY_NODE(&event->node)) {
2314 dout("__remove_event removed %p\n", event);
2315 rb_erase(&event->node, &osdc->event_tree);
2316 ceph_osdc_put_event(event);
2317 } else {
2318 dout("__remove_event didn't remove %p\n", event);
2319 }
2320}
2321
2322int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2323 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 2324 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 2325{
2326 struct ceph_osd_event *event;
2327
2328 event = kmalloc(sizeof(*event), GFP_NOIO);
2329 if (!event)
2330 return -ENOMEM;
2331
2332 dout("create_event %p\n", event);
2333 event->cb = event_cb;
3c663bbd 2334 event->one_shot = 0;
a40c4f10
YS		 2335 event->data = data;
2336 event->osdc = osdc;
2337 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 2338 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 2339 kref_init(&event->kref); /* one ref for us */
2340 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 2341
2342 spin_lock(&osdc->event_lock);
2343 event->cookie = ++osdc->event_count;
2344 __insert_event(osdc, event);
2345 spin_unlock(&osdc->event_lock);
2346
2347 *pevent = event;
2348 return 0;
2349}
2350EXPORT_SYMBOL(ceph_osdc_create_event);
2351
2352void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2353{
2354 struct ceph_osd_client *osdc = event->osdc;
2355
2356 dout("cancel_event %p\n", event);
2357 spin_lock(&osdc->event_lock);
2358 __remove_event(event);
2359 spin_unlock(&osdc->event_lock);
2360 ceph_osdc_put_event(event); /* caller's */
2361}
2362EXPORT_SYMBOL(ceph_osdc_cancel_event);
2363
2364
2365static void do_event_work(struct work_struct *work)
2366{
2367 struct ceph_osd_event_work *event_work =
2368 container_of(work, struct ceph_osd_event_work, work);
2369 struct ceph_osd_event *event = event_work->event;
2370 u64 ver = event_work->ver;
2371 u64 notify_id = event_work->notify_id;
2372 u8 opcode = event_work->opcode;
2373
2374 dout("do_event_work completing %p\n", event);
2375 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 2376 dout("do_event_work completed %p\n", event);
2377 ceph_osdc_put_event(event);
2378 kfree(event_work);
2379}
2380
2381
2382/*
2383 * Process osd watch notifications
2384 */
3c663bbd
AE		 2385static void handle_watch_notify(struct ceph_osd_client *osdc,
2386 struct ceph_msg *msg)
a40c4f10
YS		 2387{
2388 void *p, *end;
2389 u8 proto_ver;
2390 u64 cookie, ver, notify_id;
2391 u8 opcode;
2392 struct ceph_osd_event *event;
2393 struct ceph_osd_event_work *event_work;
2394
2395 p = msg->front.iov_base;
2396 end = p + msg->front.iov_len;
2397
2398 ceph_decode_8_safe(&p, end, proto_ver, bad);
2399 ceph_decode_8_safe(&p, end, opcode, bad);
2400 ceph_decode_64_safe(&p, end, cookie, bad);
2401 ceph_decode_64_safe(&p, end, ver, bad);
2402 ceph_decode_64_safe(&p, end, notify_id, bad);
2403
2404 spin_lock(&osdc->event_lock);
2405 event = __find_event(osdc, cookie);
2406 if (event) {
3c663bbd 2407 BUG_ON(event->one_shot);
a40c4f10 2408 get_event(event);
a40c4f10
YS		 2409 }
2410 spin_unlock(&osdc->event_lock);
2411 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2412 cookie, ver, event);
2413 if (event) {
2414 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10 2415 if (!event_work) {
91883cd2
ID		 2416 pr_err("couldn't allocate event_work\n");
2417 ceph_osdc_put_event(event);
2418 return;
a40c4f10 2419 }
6b0ae409 2420 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 2421 event_work->event = event;
2422 event_work->ver = ver;
2423 event_work->notify_id = notify_id;
2424 event_work->opcode = opcode;
a40c4f10 2425
91883cd2
ID		 2426 queue_work(osdc->notify_wq, &event_work->work);
2427 }
a40c4f10 2428
a40c4f10
YS		 2429 return;
2430
2431bad:
2432 pr_err("osdc handle_watch_notify corrupt msg\n");
a40c4f10
YS		 2433}
2434
e65550fd
AE		 2435/*
2436 * build new request AND message
2437 *
2438 */
2439void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2440 struct ceph_snap_context *snapc, u64 snap_id,
2441 struct timespec *mtime)
2442{
2443 struct ceph_msg *msg = req->r_request;
2444 void *p;
2445 size_t msg_size;
2446 int flags = req->r_flags;
2447 u64 data_len;
2448 unsigned int i;
2449
2450 req->r_snapid = snap_id;
84127282 2451 WARN_ON(snapc != req->r_snapc);
e65550fd
AE		 2452
2453 /* encode request */
2454 msg->hdr.version = cpu_to_le16(4);
2455
2456 p = msg->front.iov_base;
2457 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2458 req->r_request_osdmap_epoch = p;
2459 p += 4;
2460 req->r_request_flags = p;
2461 p += 4;
2462 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2463 ceph_encode_timespec(p, mtime);
2464 p += sizeof(struct ceph_timespec);
2465 req->r_request_reassert_version = p;
2466 p += sizeof(struct ceph_eversion); /* will get filled in */
2467
2468 /* oloc */
2469 ceph_encode_8(&p, 4);
2470 ceph_encode_8(&p, 4);
2471 ceph_encode_32(&p, 8 + 4 + 4);
2472 req->r_request_pool = p;
2473 p += 8;
2474 ceph_encode_32(&p, -1); /* preferred */
2475 ceph_encode_32(&p, 0); /* key len */
2476
2477 ceph_encode_8(&p, 1);
2478 req->r_request_pgid = p;
2479 p += 8 + 4;
2480 ceph_encode_32(&p, -1); /* preferred */
2481
2482 /* oid */
3c972c95
ID		 2483 ceph_encode_32(&p, req->r_base_oid.name_len);
2484 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
d30291b9 2485 dout("oid %*pE len %d\n", req->r_base_oid.name_len,
3c972c95
ID		 2486 req->r_base_oid.name, req->r_base_oid.name_len);
2487 p += req->r_base_oid.name_len;
e65550fd
AE		 2488
2489 /* ops--can imply data */
2490 ceph_encode_16(&p, (u16)req->r_num_ops);
2491 data_len = 0;
2492 for (i = 0; i < req->r_num_ops; i++) {
2493 data_len += osd_req_encode_op(req, p, i);
2494 p += sizeof(struct ceph_osd_op);
2495 }
2496
2497 /* snaps */
2498 ceph_encode_64(&p, req->r_snapid);
2499 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2500 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2501 if (req->r_snapc) {
84127282 2502 for (i = 0; i < req->r_snapc->num_snaps; i++) {
e65550fd
AE		 2503 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2504 }
2505 }
2506
2507 req->r_request_attempts = p;
2508 p += 4;
2509
2510 /* data */
2511 if (flags & CEPH_OSD_FLAG_WRITE) {
2512 u16 data_off;
2513
2514 /*
2515 * The header "data_off" is a hint to the receiver
2516 * allowing it to align received data into its
2517 * buffers such that there's no need to re-copy
2518 * it before writing it to disk (direct I/O).
2519 */
2520 data_off = (u16) (off & 0xffff);
2521 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2522 }
2523 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2524
2525 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2526 msg_size = p - msg->front.iov_base;
2527 msg->front.iov_len = msg_size;
2528 msg->hdr.front_len = cpu_to_le32(msg_size);
2529
2530 dout("build_request msg_size was %d\n", (int)msg_size);
2531}
2532EXPORT_SYMBOL(ceph_osdc_build_request);
2533
70636773
AE		 2534/*
2535 * Register request, send initial attempt.
2536 */
2537int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2538 struct ceph_osd_request *req,
2539 bool nofail)
2540{
0bbfdfe8 2541 int rc;
70636773 2542
f24e9980
SW		 2543 down_read(&osdc->map_sem);
2544 mutex_lock(&osdc->request_mutex);
0bbfdfe8
ID		 2545
2546 rc = __ceph_osdc_start_request(osdc, req, nofail);
2547
f24e9980
SW		 2548 mutex_unlock(&osdc->request_mutex);
2549 up_read(&osdc->map_sem);
0bbfdfe8 2550
f24e9980
SW		 2551 return rc;
2552}
3d14c5d2 2553EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980 2554
c9f9b93d
ID		 2555/*
2556 * Unregister a registered request. The request is not completed (i.e.
2557 * no callbacks or wakeups) - higher layers are supposed to know what
2558 * they are canceling.
2559 */
2560void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2561{
2562 struct ceph_osd_client *osdc = req->r_osdc;
2563
2564 mutex_lock(&osdc->request_mutex);
2565 if (req->r_linger)
2566 __unregister_linger_request(osdc, req);
2567 __unregister_request(osdc, req);
2568 mutex_unlock(&osdc->request_mutex);
2569
2570 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2571}
2572EXPORT_SYMBOL(ceph_osdc_cancel_request);
2573
f24e9980
SW		 2574/*
2575 * wait for a request to complete
2576 */
2577int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2578 struct ceph_osd_request *req)
2579{
2580 int rc;
2581
c9f9b93d
ID		 2582 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2583
f24e9980
SW		 2584 rc = wait_for_completion_interruptible(&req->r_completion);
2585 if (rc < 0) {
c9f9b93d
ID		 2586 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2587 ceph_osdc_cancel_request(req);
25845472 2588 complete_request(req);
f24e9980
SW		 2589 return rc;
2590 }
2591
c9f9b93d
ID		 2592 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2593 req->r_result);
f24e9980
SW		 2594 return req->r_result;
2595}
3d14c5d2 2596EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 2597
2598/*
2599 * sync - wait for all in-flight requests to flush. avoid starvation.
2600 */
2601void ceph_osdc_sync(struct ceph_osd_client *osdc)
2602{
2603 struct ceph_osd_request *req;
2604 u64 last_tid, next_tid = 0;
2605
2606 mutex_lock(&osdc->request_mutex);
2607 last_tid = osdc->last_tid;
2608 while (1) {
2609 req = __lookup_request_ge(osdc, next_tid);
2610 if (!req)
2611 break;
2612 if (req->r_tid > last_tid)
2613 break;
2614
2615 next_tid = req->r_tid + 1;
2616 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2617 continue;
2618
2619 ceph_osdc_get_request(req);
2620 mutex_unlock(&osdc->request_mutex);
2621 dout("sync waiting on tid %llu (last is %llu)\n",
2622 req->r_tid, last_tid);
2623 wait_for_completion(&req->r_safe_completion);
2624 mutex_lock(&osdc->request_mutex);
2625 ceph_osdc_put_request(req);
2626 }
2627 mutex_unlock(&osdc->request_mutex);
2628 dout("sync done (thru tid %llu)\n", last_tid);
2629}
3d14c5d2 2630EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980 2631
dd935f44
JD		 2632/*
2633 * Call all pending notify callbacks - for use after a watch is
2634 * unregistered, to make sure no more callbacks for it will be invoked
2635 */
f6479449 2636void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
dd935f44
JD		 2637{
2638 flush_workqueue(osdc->notify_wq);
2639}
2640EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2641
2642
f24e9980
SW		 2643/*
2644 * init, shutdown
2645 */
2646int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2647{
2648 int err;
2649
2650 dout("init\n");
2651 osdc->client = client;
2652 osdc->osdmap = NULL;
2653 init_rwsem(&osdc->map_sem);
f24e9980 2654 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2655 osdc->last_tid = 0;
2656 osdc->osds = RB_ROOT;
f5a2041b 2657 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2658 osdc->requests = RB_ROOT;
422d2cb8 2659 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2660 INIT_LIST_HEAD(&osdc->req_unsent);
2661 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2662 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2663 osdc->num_requests = 0;
2664 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2665 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2666 spin_lock_init(&osdc->event_lock);
2667 osdc->event_tree = RB_ROOT;
2668 osdc->event_count = 0;
f5a2041b
YS		 2669
2670 schedule_delayed_work(&osdc->osds_timeout_work,
a319bf56 2671 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
f24e9980 2672
5f44f142 2673 err = -ENOMEM;
9e767adb
ID		 2674 osdc->req_mempool = mempool_create_slab_pool(10,
2675 ceph_osd_request_cache);
f24e9980 2676 if (!osdc->req_mempool)
5f44f142 2677 goto out;
f24e9980 2678
d50b409f 2679 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
711da55d 2680 PAGE_SIZE, 10, true, "osd_op");
f24e9980 2681 if (err < 0)
5f44f142 2682 goto out_mempool;
d50b409f 2683 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
711da55d 2684 PAGE_SIZE, 10, true, "osd_op_reply");
c16e7869
SW		 2685 if (err < 0)
2686 goto out_msgpool;
a40c4f10 2687
dbcae088 2688 err = -ENOMEM;
a40c4f10 2689 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
dbcae088 2690 if (!osdc->notify_wq)
c172ec5c
ID		 2691 goto out_msgpool_reply;
2692
f24e9980 2693 return 0;
5f44f142 2694
c172ec5c
ID		 2695out_msgpool_reply:
2696 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
c16e7869
SW		 2697out_msgpool:
2698 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2699out_mempool:
2700 mempool_destroy(osdc->req_mempool);
2701out:
2702 return err;
f24e9980
SW		 2703}
2704
2705void ceph_osdc_stop(struct ceph_osd_client *osdc)
2706{
a40c4f10
YS		 2707 flush_workqueue(osdc->notify_wq);
2708 destroy_workqueue(osdc->notify_wq);
f24e9980 2709 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2710 cancel_delayed_work_sync(&osdc->osds_timeout_work);
42a2c09f
ID		 2711
2712 mutex_lock(&osdc->request_mutex);
2713 while (!RB_EMPTY_ROOT(&osdc->osds)) {
2714 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
2715 struct ceph_osd, o_node);
2716 remove_osd(osdc, osd);
2717 }
2718 mutex_unlock(&osdc->request_mutex);
2719
f24e9980
SW		 2720 if (osdc->osdmap) {
2721 ceph_osdmap_destroy(osdc->osdmap);
2722 osdc->osdmap = NULL;
2723 }
2724 mempool_destroy(osdc->req_mempool);
2725 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2726 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2727}
2728
2729/*
2730 * Read some contiguous pages. If we cross a stripe boundary, shorten
2731 * *plen. Return number of bytes read, or error.
2732 */
2733int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2734 struct ceph_vino vino, struct ceph_file_layout *layout,
2735 u64 off, u64 *plen,
2736 u32 truncate_seq, u64 truncate_size,
b7495fc2 2737 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2738{
2739 struct ceph_osd_request *req;
2740 int rc = 0;
2741
2742 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2743 vino.snap, off, *plen);
715e4cd4 2744 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
f24e9980 2745 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2746 NULL, truncate_seq, truncate_size,
153e5167 2747 false);
6816282d
SW		 2748 if (IS_ERR(req))
2749 return PTR_ERR(req);
f24e9980
SW		 2750
2751 /* it may be a short read due to an object boundary */
0fff87ec 2752
406e2c9f 2753 osd_req_op_extent_osd_data_pages(req, 0,
a4ce40a9 2754 pages, *plen, page_align, false, false);
f24e9980 2755
e0c59487 2756 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2757 off, *plen, *plen, page_align);
f24e9980 2758
79528734 2759 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
02ee07d3 2760
f24e9980
SW		 2761 rc = ceph_osdc_start_request(osdc, req, false);
2762 if (!rc)
2763 rc = ceph_osdc_wait_request(osdc, req);
2764
2765 ceph_osdc_put_request(req);
2766 dout("readpages result %d\n", rc);
2767 return rc;
2768}
3d14c5d2 2769EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2770
2771/*
2772 * do a synchronous write on N pages
2773 */
2774int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2775 struct ceph_file_layout *layout,
2776 struct ceph_snap_context *snapc,
2777 u64 off, u64 len,
2778 u32 truncate_seq, u64 truncate_size,
2779 struct timespec *mtime,
24808826 2780 struct page **pages, int num_pages)
f24e9980
SW		 2781{
2782 struct ceph_osd_request *req;
2783 int rc = 0;
b7495fc2 2784 int page_align = off & ~PAGE_MASK;
f24e9980 2785
acead002 2786 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
715e4cd4 2787 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
f24e9980 2788 CEPH_OSD_OP_WRITE,
24808826 2789 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2790 snapc, truncate_seq, truncate_size,
153e5167 2791 true);
6816282d
SW		 2792 if (IS_ERR(req))
2793 return PTR_ERR(req);
f24e9980
SW		 2794
2795 /* it may be a short write due to an object boundary */
406e2c9f 2796 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
43bfe5de
AE		 2797 false, false);
2798 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2799
79528734 2800 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
02ee07d3 2801
87f979d3 2802 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2803 if (!rc)
2804 rc = ceph_osdc_wait_request(osdc, req);
2805
2806 ceph_osdc_put_request(req);
2807 if (rc == 0)
2808 rc = len;
2809 dout("writepages result %d\n", rc);
2810 return rc;
2811}
3d14c5d2 2812EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980 2813
5522ae0b
AE		 2814int ceph_osdc_setup(void)
2815{
3f1af42a
ID		 2816 size_t size = sizeof(struct ceph_osd_request) +
2817 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
2818
5522ae0b 2819 BUG_ON(ceph_osd_request_cache);
3f1af42a
ID		 2820 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
2821 0, 0, NULL);
5522ae0b
AE		 2822
2823 return ceph_osd_request_cache ? 0 : -ENOMEM;
2824}
2825EXPORT_SYMBOL(ceph_osdc_setup);
2826
2827void ceph_osdc_cleanup(void)
2828{
2829 BUG_ON(!ceph_osd_request_cache);
2830 kmem_cache_destroy(ceph_osd_request_cache);
2831 ceph_osd_request_cache = NULL;
2832}
2833EXPORT_SYMBOL(ceph_osdc_cleanup);
2834
f24e9980
SW		 2835/*
2836 * handle incoming message
2837 */
2838static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2839{
2840 struct ceph_osd *osd = con->private;
32c895e7 2841 struct ceph_osd_client *osdc;
f24e9980
SW		 2842 int type = le16_to_cpu(msg->hdr.type);
2843
2844 if (!osd)
4a32f93d 2845 goto out;
32c895e7 2846 osdc = osd->o_osdc;
f24e9980
SW		 2847
2848 switch (type) {
2849 case CEPH_MSG_OSD_MAP:
2850 ceph_osdc_handle_map(osdc, msg);
2851 break;
2852 case CEPH_MSG_OSD_OPREPLY:
70cf052d 2853 handle_reply(osdc, msg);
f24e9980 2854 break;
a40c4f10
YS		 2855 case CEPH_MSG_WATCH_NOTIFY:
2856 handle_watch_notify(osdc, msg);
2857 break;
f24e9980
SW		 2858
2859 default:
2860 pr_err("received unknown message type %d %s\n", type,
2861 ceph_msg_type_name(type));
2862 }
4a32f93d 2863out:
f24e9980
SW		 2864 ceph_msg_put(msg);
2865}
2866
5b3a4db3 2867/*
d15f9d69
ID		 2868 * Lookup and return message for incoming reply. Don't try to do
2869 * anything about a larger than preallocated data portion of the
2870 * message at the moment - for now, just skip the message.
5b3a4db3
SW		 2871 */
2872static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2873 struct ceph_msg_header *hdr,
2874 int *skip)
f24e9980
SW		 2875{
2876 struct ceph_osd *osd = con->private;
2877 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2878 struct ceph_msg *m;
0547a9b3 2879 struct ceph_osd_request *req;
3f0a4ac5 2880 int front_len = le32_to_cpu(hdr->front_len);
5b3a4db3 2881 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2882 u64 tid;
f24e9980 2883
0547a9b3
YS		 2884 tid = le64_to_cpu(hdr->tid);
2885 mutex_lock(&osdc->request_mutex);
fcd00b68 2886 req = lookup_request(&osdc->requests, tid);
0547a9b3 2887 if (!req) {
cd8140c6
ID		 2888 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
2889 osd->o_osd, tid);
0547a9b3 2890 m = NULL;
d15f9d69 2891 *skip = 1;
0547a9b3
YS		 2892 goto out;
2893 }
c16e7869 2894
ace6d3a9 2895 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2896
f2be82b0 2897 if (front_len > req->r_reply->front_alloc_len) {
d15f9d69
ID		 2898 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
2899 __func__, osd->o_osd, req->r_tid, front_len,
2900 req->r_reply->front_alloc_len);
3f0a4ac5
ID		 2901 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2902 false);
a79832f2 2903 if (!m)
c16e7869
SW		 2904 goto out;
2905 ceph_msg_put(req->r_reply);
2906 req->r_reply = m;
2907 }
0fff87ec 2908
d15f9d69
ID		 2909 if (data_len > req->r_reply->data_length) {
2910 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
2911 __func__, osd->o_osd, req->r_tid, data_len,
2912 req->r_reply->data_length);
2913 m = NULL;
2914 *skip = 1;
2915 goto out;
0547a9b3 2916 }
d15f9d69
ID		 2917
2918 m = ceph_msg_get(req->r_reply);
c16e7869 2919 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2920
2921out:
2922 mutex_unlock(&osdc->request_mutex);
2450418c 2923 return m;
5b3a4db3
SW		 2924}
2925
2926static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2927 struct ceph_msg_header *hdr,
2928 int *skip)
2929{
2930 struct ceph_osd *osd = con->private;
2931 int type = le16_to_cpu(hdr->type);
2932 int front = le32_to_cpu(hdr->front_len);
2933
1c20f2d2 2934 *skip = 0;
5b3a4db3
SW		 2935 switch (type) {
2936 case CEPH_MSG_OSD_MAP:
a40c4f10 2937 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2938 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2939 case CEPH_MSG_OSD_OPREPLY:
2940 return get_reply(con, hdr, skip);
2941 default:
2942 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2943 osd->o_osd);
2944 *skip = 1;
2945 return NULL;
2946 }
f24e9980
SW		 2947}
2948
2949/*
2950 * Wrappers to refcount containing ceph_osd struct
2951 */
2952static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2953{
2954 struct ceph_osd *osd = con->private;
2955 if (get_osd(osd))
2956 return con;
2957 return NULL;
2958}
2959
2960static void put_osd_con(struct ceph_connection *con)
2961{
2962 struct ceph_osd *osd = con->private;
2963 put_osd(osd);
2964}
2965
4e7a5dcd
SW		 2966/*
2967 * authentication
2968 */
a3530df3
AE		 2969/*
2970 * Note: returned pointer is the address of a structure that's
2971 * managed separately. Caller must *not* attempt to free it.
2972 */
2973static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2974 int *proto, int force_new)
4e7a5dcd
SW		 2975{
2976 struct ceph_osd *o = con->private;
2977 struct ceph_osd_client *osdc = o->o_osdc;
2978 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2979 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2980
74f1869f 2981 if (force_new && auth->authorizer) {
6c1ea260 2982 ceph_auth_destroy_authorizer(auth->authorizer);
74f1869f
AE		 2983 auth->authorizer = NULL;
2984 }
27859f97
SW		 2985 if (!auth->authorizer) {
2986 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2987 auth);
4e7a5dcd 2988 if (ret)
a3530df3 2989 return ERR_PTR(ret);
27859f97
SW		 2990 } else {
2991 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2992 auth);
2993 if (ret)
2994 return ERR_PTR(ret);
4e7a5dcd 2995 }
4e7a5dcd 2996 *proto = ac->protocol;
74f1869f 2997
a3530df3 2998 return auth;
4e7a5dcd
SW		 2999}
3000
3001
3002static int verify_authorizer_reply(struct ceph_connection *con, int len)
3003{
3004 struct ceph_osd *o = con->private;
3005 struct ceph_osd_client *osdc = o->o_osdc;
3006 struct ceph_auth_client *ac = osdc->client->monc.auth;
3007
27859f97 3008 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 3009}
3010
9bd2e6f8
SW		 3011static int invalidate_authorizer(struct ceph_connection *con)
3012{
3013 struct ceph_osd *o = con->private;
3014 struct ceph_osd_client *osdc = o->o_osdc;
3015 struct ceph_auth_client *ac = osdc->client->monc.auth;
3016
27859f97 3017 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 3018 return ceph_monc_validate_auth(&osdc->client->monc);
3019}
4e7a5dcd 3020
79dbd1ba 3021static int osd_sign_message(struct ceph_msg *msg)
33d07337 3022{
79dbd1ba 3023 struct ceph_osd *o = msg->con->private;
33d07337 3024 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 3025
33d07337
YZ		 3026 return ceph_auth_sign_message(auth, msg);
3027}
3028
79dbd1ba 3029static int osd_check_message_signature(struct ceph_msg *msg)
33d07337 3030{
79dbd1ba 3031 struct ceph_osd *o = msg->con->private;
33d07337 3032 struct ceph_auth_handshake *auth = &o->o_auth;
79dbd1ba 3033
33d07337
YZ		 3034 return ceph_auth_check_message_signature(auth, msg);
3035}
3036
9e32789f 3037static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 3038 .get = get_osd_con,
3039 .put = put_osd_con,
3040 .dispatch = dispatch,
4e7a5dcd
SW		 3041 .get_authorizer = get_authorizer,
3042 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 3043 .invalidate_authorizer = invalidate_authorizer,
f24e9980 3044 .alloc_msg = alloc_msg,
79dbd1ba
ID		 3045 .sign_message = osd_sign_message,
3046 .check_message_signature = osd_check_message_signature,
81b024e7 3047 .fault = osd_reset,
f24e9980 3048};
Linux kernel - Deliverables
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