This source file includes following definitions.
- rwsem_is_wrlocked
- verify_osdc_locked
- verify_osdc_wrlocked
- verify_osd_locked
- verify_lreq_locked
- verify_osdc_locked
- verify_osdc_wrlocked
- verify_osd_locked
- verify_lreq_locked
- calc_layout
- ceph_osd_data_init
- ceph_osd_data_pages_init
- ceph_osd_data_pagelist_init
- ceph_osd_data_bio_init
- ceph_osd_data_bvecs_init
- osd_req_op_raw_data_in
- osd_req_op_extent_osd_data
- osd_req_op_raw_data_in_pages
- osd_req_op_extent_osd_data_pages
- osd_req_op_extent_osd_data_pagelist
- osd_req_op_extent_osd_data_bio
- osd_req_op_extent_osd_data_bvecs
- osd_req_op_extent_osd_data_bvec_pos
- osd_req_op_cls_request_info_pagelist
- osd_req_op_cls_request_data_pagelist
- osd_req_op_cls_request_data_pages
- osd_req_op_cls_request_data_bvecs
- osd_req_op_cls_response_data_pages
- ceph_osd_data_length
- ceph_osd_data_release
- osd_req_op_data_release
- target_init
- target_copy
- target_destroy
- request_release_checks
- ceph_osdc_release_request
- ceph_osdc_get_request
- ceph_osdc_put_request
- request_init
- request_reinit
- ceph_osdc_alloc_request
- ceph_oloc_encoding_size
- __ceph_osdc_alloc_messages
- osd_req_opcode_valid
- get_num_data_items
- ceph_osdc_alloc_messages
- _osd_req_op_init
- osd_req_op_init
- osd_req_op_extent_init
- osd_req_op_extent_update
- osd_req_op_extent_dup_last
- osd_req_op_cls_init
- osd_req_op_xattr_init
- osd_req_op_watch_init
- osd_req_op_alloc_hint_init
- ceph_osdc_msg_data_add
- osd_req_encode_op
- ceph_osdc_new_request
- DEFINE_RB_FUNCS
- osd_homeless
- osd_registered
- osd_init
- osd_cleanup
- create_osd
- get_osd
- put_osd
- DEFINE_RB_FUNCS
- maybe_move_osd_to_lru
- __remove_osd_from_lru
- close_osd
- reopen_osd
- lookup_create_osd
- link_request
- unlink_request
- __pool_full
- have_pool_full
- pool_full
- target_should_be_paused
- alloc_spg_mapping
- free_spg_mapping
- DEFINE_RB_FUNCS2
- hoid_get_effective_key
- compare_names
- hoid_compare
- decode_hoid
- hoid_encoding_size
- encode_hoid
- free_hoid
- alloc_backoff
- free_backoff
- lookup_containing_backoff
- DEFINE_RB_FUNCS
- hoid_fill_from_target
- should_plug_request
- setup_request_data
- encode_pgid
- encode_spgid
- encode_oloc
- encode_request_partial
- encode_request_finish
- send_request
- maybe_request_map
- __submit_request
- account_request
- submit_request
- finish_request
- __complete_request
- complete_request_workfn
- complete_request
- cancel_map_check
- cancel_request
- abort_request
- abort_fn
- ceph_osdc_abort_requests
- ceph_osdc_clear_abort_err
- update_epoch_barrier
- ceph_osdc_update_epoch_barrier
- abort_on_full_fn
- ceph_osdc_abort_on_full
- check_pool_dne
- map_check_cb
- send_map_check
- linger_release
- linger_put
- linger_get
- linger_alloc
- DEFINE_RB_INSDEL_FUNCS
- unlink_linger
- __linger_registered
- linger_registered
- linger_register
- linger_unregister
- cancel_linger_request
- lwork_alloc
- lwork_free
- lwork_queue
- do_watch_notify
- do_watch_error
- queue_watch_error
- linger_reg_commit_complete
- linger_commit_cb
- normalize_watch_error
- linger_reconnect_cb
- send_linger
- linger_ping_cb
- send_linger_ping
- linger_submit
- cancel_linger_map_check
- __linger_cancel
- linger_cancel
- check_linger_pool_dne
- linger_map_check_cb
- send_linger_map_check
- linger_reg_commit_wait
- linger_notify_finish_wait
- handle_timeout
- handle_osds_timeout
- ceph_oloc_decode
- ceph_redirect_decode
- decode_MOSDOpReply
- handle_reply
- set_pool_was_full
- pool_cleared_full
- recalc_linger_target
- scan_requests
- handle_one_map
- kick_requests
- ceph_osdc_handle_map
- kick_osd_requests
- osd_fault
- decode_MOSDBackoff
- create_backoff_message
- handle_backoff_block
- target_contained_by
- handle_backoff_unblock
- handle_backoff
- handle_watch_notify
- ceph_osdc_start_request
- ceph_osdc_cancel_request
- wait_request_timeout
- ceph_osdc_wait_request
- ceph_osdc_sync
- alloc_linger_request
- alloc_watch_request
- ceph_osdc_watch
- ceph_osdc_unwatch
- osd_req_op_notify_ack_init
- ceph_osdc_notify_ack
- osd_req_op_notify_init
- ceph_osdc_notify
- ceph_osdc_watch_check
- decode_watcher
- decode_watchers
- ceph_osdc_list_watchers
- ceph_osdc_flush_notifies
- ceph_osdc_maybe_request_map
- ceph_osdc_call
- ceph_osdc_reopen_osds
- ceph_osdc_init
- ceph_osdc_stop
- ceph_osdc_readpages
- ceph_osdc_writepages
- osd_req_op_copy_from_init
- ceph_osdc_copy_from
- ceph_osdc_setup
- ceph_osdc_cleanup
- dispatch
- get_reply
- alloc_msg_with_page_vector
- alloc_msg
- get_osd_con
- put_osd_con
- get_authorizer
- add_authorizer_challenge
- verify_authorizer_reply
- invalidate_authorizer
- osd_reencode_message
- osd_sign_message
- osd_check_message_signature
1
2
3 #include <linux/ceph/ceph_debug.h>
4
5 #include <linux/module.h>
6 #include <linux/err.h>
7 #include <linux/highmem.h>
8 #include <linux/mm.h>
9 #include <linux/pagemap.h>
10 #include <linux/slab.h>
11 #include <linux/uaccess.h>
12 #ifdef CONFIG_BLOCK
13 #include <linux/bio.h>
14 #endif
15
16 #include <linux/ceph/ceph_features.h>
17 #include <linux/ceph/libceph.h>
18 #include <linux/ceph/osd_client.h>
19 #include <linux/ceph/messenger.h>
20 #include <linux/ceph/decode.h>
21 #include <linux/ceph/auth.h>
22 #include <linux/ceph/pagelist.h>
23 #include <linux/ceph/striper.h>
24
25 #define OSD_OPREPLY_FRONT_LEN 512
26
27 static struct kmem_cache *ceph_osd_request_cache;
28
29 static const struct ceph_connection_operations osd_con_ops;
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
50 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
51 static void link_linger(struct ceph_osd *osd,
52 struct ceph_osd_linger_request *lreq);
53 static void unlink_linger(struct ceph_osd *osd,
54 struct ceph_osd_linger_request *lreq);
55 static void clear_backoffs(struct ceph_osd *osd);
56
57 #if 1
58 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
59 {
60 bool wrlocked = true;
61
62 if (unlikely(down_read_trylock(sem))) {
63 wrlocked = false;
64 up_read(sem);
65 }
66
67 return wrlocked;
68 }
69 static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
70 {
71 WARN_ON(!rwsem_is_locked(&osdc->lock));
72 }
73 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
74 {
75 WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
76 }
77 static inline void verify_osd_locked(struct ceph_osd *osd)
78 {
79 struct ceph_osd_client *osdc = osd->o_osdc;
80
81 WARN_ON(!(mutex_is_locked(&osd->lock) &&
82 rwsem_is_locked(&osdc->lock)) &&
83 !rwsem_is_wrlocked(&osdc->lock));
84 }
85 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
86 {
87 WARN_ON(!mutex_is_locked(&lreq->lock));
88 }
89 #else
90 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
91 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
92 static inline void verify_osd_locked(struct ceph_osd *osd) { }
93 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
94 #endif
95
96
97
98
99
100
101
102
103 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
104 u64 *objnum, u64 *objoff, u64 *objlen)
105 {
106 u64 orig_len = *plen;
107 u32 xlen;
108
109
110 ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
111 objoff, &xlen);
112 *objlen = xlen;
113 if (*objlen < orig_len) {
114 *plen = *objlen;
115 dout(" skipping last %llu, final file extent %llu~%llu\n",
116 orig_len - *plen, off, *plen);
117 }
118
119 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
120 return 0;
121 }
122
123 static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
124 {
125 memset(osd_data, 0, sizeof (*osd_data));
126 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
127 }
128
129
130
131
132 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
133 struct page **pages, u64 length, u32 alignment,
134 bool pages_from_pool, bool own_pages)
135 {
136 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
137 osd_data->pages = pages;
138 osd_data->length = length;
139 osd_data->alignment = alignment;
140 osd_data->pages_from_pool = pages_from_pool;
141 osd_data->own_pages = own_pages;
142 }
143
144
145
146
147 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
148 struct ceph_pagelist *pagelist)
149 {
150 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
151 osd_data->pagelist = pagelist;
152 }
153
154 #ifdef CONFIG_BLOCK
155 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
156 struct ceph_bio_iter *bio_pos,
157 u32 bio_length)
158 {
159 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
160 osd_data->bio_pos = *bio_pos;
161 osd_data->bio_length = bio_length;
162 }
163 #endif
164
165 static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
166 struct ceph_bvec_iter *bvec_pos,
167 u32 num_bvecs)
168 {
169 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
170 osd_data->bvec_pos = *bvec_pos;
171 osd_data->num_bvecs = num_bvecs;
172 }
173
174 static struct ceph_osd_data *
175 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
176 {
177 BUG_ON(which >= osd_req->r_num_ops);
178
179 return &osd_req->r_ops[which].raw_data_in;
180 }
181
182 struct ceph_osd_data *
183 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
184 unsigned int which)
185 {
186 return osd_req_op_data(osd_req, which, extent, osd_data);
187 }
188 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
189
190 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
191 unsigned int which, struct page **pages,
192 u64 length, u32 alignment,
193 bool pages_from_pool, bool own_pages)
194 {
195 struct ceph_osd_data *osd_data;
196
197 osd_data = osd_req_op_raw_data_in(osd_req, which);
198 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
199 pages_from_pool, own_pages);
200 }
201 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
202
203 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
204 unsigned int which, struct page **pages,
205 u64 length, u32 alignment,
206 bool pages_from_pool, bool own_pages)
207 {
208 struct ceph_osd_data *osd_data;
209
210 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
211 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
212 pages_from_pool, own_pages);
213 }
214 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
215
216 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
217 unsigned int which, struct ceph_pagelist *pagelist)
218 {
219 struct ceph_osd_data *osd_data;
220
221 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
222 ceph_osd_data_pagelist_init(osd_data, pagelist);
223 }
224 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
225
226 #ifdef CONFIG_BLOCK
227 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
228 unsigned int which,
229 struct ceph_bio_iter *bio_pos,
230 u32 bio_length)
231 {
232 struct ceph_osd_data *osd_data;
233
234 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
235 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
236 }
237 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
238 #endif
239
240 void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
241 unsigned int which,
242 struct bio_vec *bvecs, u32 num_bvecs,
243 u32 bytes)
244 {
245 struct ceph_osd_data *osd_data;
246 struct ceph_bvec_iter it = {
247 .bvecs = bvecs,
248 .iter = { .bi_size = bytes },
249 };
250
251 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
252 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
253 }
254 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
255
256 void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
257 unsigned int which,
258 struct ceph_bvec_iter *bvec_pos)
259 {
260 struct ceph_osd_data *osd_data;
261
262 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
263 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
264 }
265 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
266
267 static void osd_req_op_cls_request_info_pagelist(
268 struct ceph_osd_request *osd_req,
269 unsigned int which, struct ceph_pagelist *pagelist)
270 {
271 struct ceph_osd_data *osd_data;
272
273 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
274 ceph_osd_data_pagelist_init(osd_data, pagelist);
275 }
276
277 void osd_req_op_cls_request_data_pagelist(
278 struct ceph_osd_request *osd_req,
279 unsigned int which, struct ceph_pagelist *pagelist)
280 {
281 struct ceph_osd_data *osd_data;
282
283 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
284 ceph_osd_data_pagelist_init(osd_data, pagelist);
285 osd_req->r_ops[which].cls.indata_len += pagelist->length;
286 osd_req->r_ops[which].indata_len += pagelist->length;
287 }
288 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
289
290 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
291 unsigned int which, struct page **pages, u64 length,
292 u32 alignment, bool pages_from_pool, bool own_pages)
293 {
294 struct ceph_osd_data *osd_data;
295
296 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
297 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
298 pages_from_pool, own_pages);
299 osd_req->r_ops[which].cls.indata_len += length;
300 osd_req->r_ops[which].indata_len += length;
301 }
302 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
303
304 void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
305 unsigned int which,
306 struct bio_vec *bvecs, u32 num_bvecs,
307 u32 bytes)
308 {
309 struct ceph_osd_data *osd_data;
310 struct ceph_bvec_iter it = {
311 .bvecs = bvecs,
312 .iter = { .bi_size = bytes },
313 };
314
315 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
316 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
317 osd_req->r_ops[which].cls.indata_len += bytes;
318 osd_req->r_ops[which].indata_len += bytes;
319 }
320 EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
321
322 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
323 unsigned int which, struct page **pages, u64 length,
324 u32 alignment, bool pages_from_pool, bool own_pages)
325 {
326 struct ceph_osd_data *osd_data;
327
328 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
329 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
330 pages_from_pool, own_pages);
331 }
332 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
333
334 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
335 {
336 switch (osd_data->type) {
337 case CEPH_OSD_DATA_TYPE_NONE:
338 return 0;
339 case CEPH_OSD_DATA_TYPE_PAGES:
340 return osd_data->length;
341 case CEPH_OSD_DATA_TYPE_PAGELIST:
342 return (u64)osd_data->pagelist->length;
343 #ifdef CONFIG_BLOCK
344 case CEPH_OSD_DATA_TYPE_BIO:
345 return (u64)osd_data->bio_length;
346 #endif
347 case CEPH_OSD_DATA_TYPE_BVECS:
348 return osd_data->bvec_pos.iter.bi_size;
349 default:
350 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
351 return 0;
352 }
353 }
354
355 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
356 {
357 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
358 int num_pages;
359
360 num_pages = calc_pages_for((u64)osd_data->alignment,
361 (u64)osd_data->length);
362 ceph_release_page_vector(osd_data->pages, num_pages);
363 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
364 ceph_pagelist_release(osd_data->pagelist);
365 }
366 ceph_osd_data_init(osd_data);
367 }
368
369 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
370 unsigned int which)
371 {
372 struct ceph_osd_req_op *op;
373
374 BUG_ON(which >= osd_req->r_num_ops);
375 op = &osd_req->r_ops[which];
376
377 switch (op->op) {
378 case CEPH_OSD_OP_READ:
379 case CEPH_OSD_OP_WRITE:
380 case CEPH_OSD_OP_WRITEFULL:
381 ceph_osd_data_release(&op->extent.osd_data);
382 break;
383 case CEPH_OSD_OP_CALL:
384 ceph_osd_data_release(&op->cls.request_info);
385 ceph_osd_data_release(&op->cls.request_data);
386 ceph_osd_data_release(&op->cls.response_data);
387 break;
388 case CEPH_OSD_OP_SETXATTR:
389 case CEPH_OSD_OP_CMPXATTR:
390 ceph_osd_data_release(&op->xattr.osd_data);
391 break;
392 case CEPH_OSD_OP_STAT:
393 ceph_osd_data_release(&op->raw_data_in);
394 break;
395 case CEPH_OSD_OP_NOTIFY_ACK:
396 ceph_osd_data_release(&op->notify_ack.request_data);
397 break;
398 case CEPH_OSD_OP_NOTIFY:
399 ceph_osd_data_release(&op->notify.request_data);
400 ceph_osd_data_release(&op->notify.response_data);
401 break;
402 case CEPH_OSD_OP_LIST_WATCHERS:
403 ceph_osd_data_release(&op->list_watchers.response_data);
404 break;
405 case CEPH_OSD_OP_COPY_FROM:
406 ceph_osd_data_release(&op->copy_from.osd_data);
407 break;
408 default:
409 break;
410 }
411 }
412
413
414
415
416 static void target_init(struct ceph_osd_request_target *t)
417 {
418 ceph_oid_init(&t->base_oid);
419 ceph_oloc_init(&t->base_oloc);
420 ceph_oid_init(&t->target_oid);
421 ceph_oloc_init(&t->target_oloc);
422
423 ceph_osds_init(&t->acting);
424 ceph_osds_init(&t->up);
425 t->size = -1;
426 t->min_size = -1;
427
428 t->osd = CEPH_HOMELESS_OSD;
429 }
430
431 static void target_copy(struct ceph_osd_request_target *dest,
432 const struct ceph_osd_request_target *src)
433 {
434 ceph_oid_copy(&dest->base_oid, &src->base_oid);
435 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
436 ceph_oid_copy(&dest->target_oid, &src->target_oid);
437 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
438
439 dest->pgid = src->pgid;
440 dest->spgid = src->spgid;
441 dest->pg_num = src->pg_num;
442 dest->pg_num_mask = src->pg_num_mask;
443 ceph_osds_copy(&dest->acting, &src->acting);
444 ceph_osds_copy(&dest->up, &src->up);
445 dest->size = src->size;
446 dest->min_size = src->min_size;
447 dest->sort_bitwise = src->sort_bitwise;
448
449 dest->flags = src->flags;
450 dest->paused = src->paused;
451
452 dest->epoch = src->epoch;
453 dest->last_force_resend = src->last_force_resend;
454
455 dest->osd = src->osd;
456 }
457
458 static void target_destroy(struct ceph_osd_request_target *t)
459 {
460 ceph_oid_destroy(&t->base_oid);
461 ceph_oloc_destroy(&t->base_oloc);
462 ceph_oid_destroy(&t->target_oid);
463 ceph_oloc_destroy(&t->target_oloc);
464 }
465
466
467
468
469 static void request_release_checks(struct ceph_osd_request *req)
470 {
471 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
472 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
473 WARN_ON(!list_empty(&req->r_private_item));
474 WARN_ON(req->r_osd);
475 }
476
477 static void ceph_osdc_release_request(struct kref *kref)
478 {
479 struct ceph_osd_request *req = container_of(kref,
480 struct ceph_osd_request, r_kref);
481 unsigned int which;
482
483 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
484 req->r_request, req->r_reply);
485 request_release_checks(req);
486
487 if (req->r_request)
488 ceph_msg_put(req->r_request);
489 if (req->r_reply)
490 ceph_msg_put(req->r_reply);
491
492 for (which = 0; which < req->r_num_ops; which++)
493 osd_req_op_data_release(req, which);
494
495 target_destroy(&req->r_t);
496 ceph_put_snap_context(req->r_snapc);
497
498 if (req->r_mempool)
499 mempool_free(req, req->r_osdc->req_mempool);
500 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
501 kmem_cache_free(ceph_osd_request_cache, req);
502 else
503 kfree(req);
504 }
505
506 void ceph_osdc_get_request(struct ceph_osd_request *req)
507 {
508 dout("%s %p (was %d)\n", __func__, req,
509 kref_read(&req->r_kref));
510 kref_get(&req->r_kref);
511 }
512 EXPORT_SYMBOL(ceph_osdc_get_request);
513
514 void ceph_osdc_put_request(struct ceph_osd_request *req)
515 {
516 if (req) {
517 dout("%s %p (was %d)\n", __func__, req,
518 kref_read(&req->r_kref));
519 kref_put(&req->r_kref, ceph_osdc_release_request);
520 }
521 }
522 EXPORT_SYMBOL(ceph_osdc_put_request);
523
524 static void request_init(struct ceph_osd_request *req)
525 {
526
527 memset(req, 0, sizeof(*req));
528
529 kref_init(&req->r_kref);
530 init_completion(&req->r_completion);
531 RB_CLEAR_NODE(&req->r_node);
532 RB_CLEAR_NODE(&req->r_mc_node);
533 INIT_LIST_HEAD(&req->r_private_item);
534
535 target_init(&req->r_t);
536 }
537
538
539
540
541
542
543
544
545 static void request_reinit(struct ceph_osd_request *req)
546 {
547 struct ceph_osd_client *osdc = req->r_osdc;
548 bool mempool = req->r_mempool;
549 unsigned int num_ops = req->r_num_ops;
550 u64 snapid = req->r_snapid;
551 struct ceph_snap_context *snapc = req->r_snapc;
552 bool linger = req->r_linger;
553 struct ceph_msg *request_msg = req->r_request;
554 struct ceph_msg *reply_msg = req->r_reply;
555
556 dout("%s req %p\n", __func__, req);
557 WARN_ON(kref_read(&req->r_kref) != 1);
558 request_release_checks(req);
559
560 WARN_ON(kref_read(&request_msg->kref) != 1);
561 WARN_ON(kref_read(&reply_msg->kref) != 1);
562 target_destroy(&req->r_t);
563
564 request_init(req);
565 req->r_osdc = osdc;
566 req->r_mempool = mempool;
567 req->r_num_ops = num_ops;
568 req->r_snapid = snapid;
569 req->r_snapc = snapc;
570 req->r_linger = linger;
571 req->r_request = request_msg;
572 req->r_reply = reply_msg;
573 }
574
575 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
576 struct ceph_snap_context *snapc,
577 unsigned int num_ops,
578 bool use_mempool,
579 gfp_t gfp_flags)
580 {
581 struct ceph_osd_request *req;
582
583 if (use_mempool) {
584 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
585 req = mempool_alloc(osdc->req_mempool, gfp_flags);
586 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
587 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
588 } else {
589 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
590 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
591 }
592 if (unlikely(!req))
593 return NULL;
594
595 request_init(req);
596 req->r_osdc = osdc;
597 req->r_mempool = use_mempool;
598 req->r_num_ops = num_ops;
599 req->r_snapid = CEPH_NOSNAP;
600 req->r_snapc = ceph_get_snap_context(snapc);
601
602 dout("%s req %p\n", __func__, req);
603 return req;
604 }
605 EXPORT_SYMBOL(ceph_osdc_alloc_request);
606
607 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
608 {
609 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
610 }
611
612 static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
613 int num_request_data_items,
614 int num_reply_data_items)
615 {
616 struct ceph_osd_client *osdc = req->r_osdc;
617 struct ceph_msg *msg;
618 int msg_size;
619
620 WARN_ON(req->r_request || req->r_reply);
621 WARN_ON(ceph_oid_empty(&req->r_base_oid));
622 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
623
624
625 msg_size = CEPH_ENCODING_START_BLK_LEN +
626 CEPH_PGID_ENCODING_LEN + 1;
627 msg_size += 4 + 4 + 4;
628 msg_size += CEPH_ENCODING_START_BLK_LEN +
629 sizeof(struct ceph_osd_reqid);
630 msg_size += sizeof(struct ceph_blkin_trace_info);
631 msg_size += 4 + sizeof(struct ceph_timespec);
632 msg_size += CEPH_ENCODING_START_BLK_LEN +
633 ceph_oloc_encoding_size(&req->r_base_oloc);
634 msg_size += 4 + req->r_base_oid.name_len;
635 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
636 msg_size += 8;
637 msg_size += 8;
638 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
639 msg_size += 4 + 8;
640
641 if (req->r_mempool)
642 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
643 num_request_data_items);
644 else
645 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
646 num_request_data_items, gfp, true);
647 if (!msg)
648 return -ENOMEM;
649
650 memset(msg->front.iov_base, 0, msg->front.iov_len);
651 req->r_request = msg;
652
653
654 msg_size = OSD_OPREPLY_FRONT_LEN;
655 msg_size += req->r_base_oid.name_len;
656 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
657
658 if (req->r_mempool)
659 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
660 num_reply_data_items);
661 else
662 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
663 num_reply_data_items, gfp, true);
664 if (!msg)
665 return -ENOMEM;
666
667 req->r_reply = msg;
668
669 return 0;
670 }
671
672 static bool osd_req_opcode_valid(u16 opcode)
673 {
674 switch (opcode) {
675 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
676 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
677 #undef GENERATE_CASE
678 default:
679 return false;
680 }
681 }
682
683 static void get_num_data_items(struct ceph_osd_request *req,
684 int *num_request_data_items,
685 int *num_reply_data_items)
686 {
687 struct ceph_osd_req_op *op;
688
689 *num_request_data_items = 0;
690 *num_reply_data_items = 0;
691
692 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
693 switch (op->op) {
694
695 case CEPH_OSD_OP_WRITE:
696 case CEPH_OSD_OP_WRITEFULL:
697 case CEPH_OSD_OP_SETXATTR:
698 case CEPH_OSD_OP_CMPXATTR:
699 case CEPH_OSD_OP_NOTIFY_ACK:
700 case CEPH_OSD_OP_COPY_FROM:
701 *num_request_data_items += 1;
702 break;
703
704
705 case CEPH_OSD_OP_STAT:
706 case CEPH_OSD_OP_READ:
707 case CEPH_OSD_OP_LIST_WATCHERS:
708 *num_reply_data_items += 1;
709 break;
710
711
712 case CEPH_OSD_OP_NOTIFY:
713 *num_request_data_items += 1;
714 *num_reply_data_items += 1;
715 break;
716 case CEPH_OSD_OP_CALL:
717 *num_request_data_items += 2;
718 *num_reply_data_items += 1;
719 break;
720
721 default:
722 WARN_ON(!osd_req_opcode_valid(op->op));
723 break;
724 }
725 }
726 }
727
728
729
730
731
732 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
733 {
734 int num_request_data_items, num_reply_data_items;
735
736 get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
737 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
738 num_reply_data_items);
739 }
740 EXPORT_SYMBOL(ceph_osdc_alloc_messages);
741
742
743
744
745
746
747 static struct ceph_osd_req_op *
748 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
749 u16 opcode, u32 flags)
750 {
751 struct ceph_osd_req_op *op;
752
753 BUG_ON(which >= osd_req->r_num_ops);
754 BUG_ON(!osd_req_opcode_valid(opcode));
755
756 op = &osd_req->r_ops[which];
757 memset(op, 0, sizeof (*op));
758 op->op = opcode;
759 op->flags = flags;
760
761 return op;
762 }
763
764 void osd_req_op_init(struct ceph_osd_request *osd_req,
765 unsigned int which, u16 opcode, u32 flags)
766 {
767 (void)_osd_req_op_init(osd_req, which, opcode, flags);
768 }
769 EXPORT_SYMBOL(osd_req_op_init);
770
771 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
772 unsigned int which, u16 opcode,
773 u64 offset, u64 length,
774 u64 truncate_size, u32 truncate_seq)
775 {
776 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
777 opcode, 0);
778 size_t payload_len = 0;
779
780 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
781 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
782 opcode != CEPH_OSD_OP_TRUNCATE);
783
784 op->extent.offset = offset;
785 op->extent.length = length;
786 op->extent.truncate_size = truncate_size;
787 op->extent.truncate_seq = truncate_seq;
788 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
789 payload_len += length;
790
791 op->indata_len = payload_len;
792 }
793 EXPORT_SYMBOL(osd_req_op_extent_init);
794
795 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
796 unsigned int which, u64 length)
797 {
798 struct ceph_osd_req_op *op;
799 u64 previous;
800
801 BUG_ON(which >= osd_req->r_num_ops);
802 op = &osd_req->r_ops[which];
803 previous = op->extent.length;
804
805 if (length == previous)
806 return;
807 BUG_ON(length > previous);
808
809 op->extent.length = length;
810 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
811 op->indata_len -= previous - length;
812 }
813 EXPORT_SYMBOL(osd_req_op_extent_update);
814
815 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
816 unsigned int which, u64 offset_inc)
817 {
818 struct ceph_osd_req_op *op, *prev_op;
819
820 BUG_ON(which + 1 >= osd_req->r_num_ops);
821
822 prev_op = &osd_req->r_ops[which];
823 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
824
825 op->indata_len = prev_op->indata_len;
826 op->outdata_len = prev_op->outdata_len;
827 op->extent = prev_op->extent;
828
829 op->extent.offset += offset_inc;
830 op->extent.length -= offset_inc;
831
832 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
833 op->indata_len -= offset_inc;
834 }
835 EXPORT_SYMBOL(osd_req_op_extent_dup_last);
836
837 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
838 const char *class, const char *method)
839 {
840 struct ceph_osd_req_op *op;
841 struct ceph_pagelist *pagelist;
842 size_t payload_len = 0;
843 size_t size;
844 int ret;
845
846 op = _osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
847
848 pagelist = ceph_pagelist_alloc(GFP_NOFS);
849 if (!pagelist)
850 return -ENOMEM;
851
852 op->cls.class_name = class;
853 size = strlen(class);
854 BUG_ON(size > (size_t) U8_MAX);
855 op->cls.class_len = size;
856 ret = ceph_pagelist_append(pagelist, class, size);
857 if (ret)
858 goto err_pagelist_free;
859 payload_len += size;
860
861 op->cls.method_name = method;
862 size = strlen(method);
863 BUG_ON(size > (size_t) U8_MAX);
864 op->cls.method_len = size;
865 ret = ceph_pagelist_append(pagelist, method, size);
866 if (ret)
867 goto err_pagelist_free;
868 payload_len += size;
869
870 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
871 op->indata_len = payload_len;
872 return 0;
873
874 err_pagelist_free:
875 ceph_pagelist_release(pagelist);
876 return ret;
877 }
878 EXPORT_SYMBOL(osd_req_op_cls_init);
879
880 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
881 u16 opcode, const char *name, const void *value,
882 size_t size, u8 cmp_op, u8 cmp_mode)
883 {
884 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
885 opcode, 0);
886 struct ceph_pagelist *pagelist;
887 size_t payload_len;
888 int ret;
889
890 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
891
892 pagelist = ceph_pagelist_alloc(GFP_NOFS);
893 if (!pagelist)
894 return -ENOMEM;
895
896 payload_len = strlen(name);
897 op->xattr.name_len = payload_len;
898 ret = ceph_pagelist_append(pagelist, name, payload_len);
899 if (ret)
900 goto err_pagelist_free;
901
902 op->xattr.value_len = size;
903 ret = ceph_pagelist_append(pagelist, value, size);
904 if (ret)
905 goto err_pagelist_free;
906 payload_len += size;
907
908 op->xattr.cmp_op = cmp_op;
909 op->xattr.cmp_mode = cmp_mode;
910
911 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
912 op->indata_len = payload_len;
913 return 0;
914
915 err_pagelist_free:
916 ceph_pagelist_release(pagelist);
917 return ret;
918 }
919 EXPORT_SYMBOL(osd_req_op_xattr_init);
920
921
922
923
924 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
925 u64 cookie, u8 watch_opcode)
926 {
927 struct ceph_osd_req_op *op;
928
929 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
930 op->watch.cookie = cookie;
931 op->watch.op = watch_opcode;
932 op->watch.gen = 0;
933 }
934
935 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
936 unsigned int which,
937 u64 expected_object_size,
938 u64 expected_write_size)
939 {
940 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
941 CEPH_OSD_OP_SETALLOCHINT,
942 0);
943
944 op->alloc_hint.expected_object_size = expected_object_size;
945 op->alloc_hint.expected_write_size = expected_write_size;
946
947
948
949
950
951
952 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
953 }
954 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
955
956 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
957 struct ceph_osd_data *osd_data)
958 {
959 u64 length = ceph_osd_data_length(osd_data);
960
961 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
962 BUG_ON(length > (u64) SIZE_MAX);
963 if (length)
964 ceph_msg_data_add_pages(msg, osd_data->pages,
965 length, osd_data->alignment, false);
966 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
967 BUG_ON(!length);
968 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
969 #ifdef CONFIG_BLOCK
970 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
971 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
972 #endif
973 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
974 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
975 } else {
976 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
977 }
978 }
979
980 static u32 osd_req_encode_op(struct ceph_osd_op *dst,
981 const struct ceph_osd_req_op *src)
982 {
983 switch (src->op) {
984 case CEPH_OSD_OP_STAT:
985 break;
986 case CEPH_OSD_OP_READ:
987 case CEPH_OSD_OP_WRITE:
988 case CEPH_OSD_OP_WRITEFULL:
989 case CEPH_OSD_OP_ZERO:
990 case CEPH_OSD_OP_TRUNCATE:
991 dst->extent.offset = cpu_to_le64(src->extent.offset);
992 dst->extent.length = cpu_to_le64(src->extent.length);
993 dst->extent.truncate_size =
994 cpu_to_le64(src->extent.truncate_size);
995 dst->extent.truncate_seq =
996 cpu_to_le32(src->extent.truncate_seq);
997 break;
998 case CEPH_OSD_OP_CALL:
999 dst->cls.class_len = src->cls.class_len;
1000 dst->cls.method_len = src->cls.method_len;
1001 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
1002 break;
1003 case CEPH_OSD_OP_WATCH:
1004 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
1005 dst->watch.ver = cpu_to_le64(0);
1006 dst->watch.op = src->watch.op;
1007 dst->watch.gen = cpu_to_le32(src->watch.gen);
1008 break;
1009 case CEPH_OSD_OP_NOTIFY_ACK:
1010 break;
1011 case CEPH_OSD_OP_NOTIFY:
1012 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
1013 break;
1014 case CEPH_OSD_OP_LIST_WATCHERS:
1015 break;
1016 case CEPH_OSD_OP_SETALLOCHINT:
1017 dst->alloc_hint.expected_object_size =
1018 cpu_to_le64(src->alloc_hint.expected_object_size);
1019 dst->alloc_hint.expected_write_size =
1020 cpu_to_le64(src->alloc_hint.expected_write_size);
1021 break;
1022 case CEPH_OSD_OP_SETXATTR:
1023 case CEPH_OSD_OP_CMPXATTR:
1024 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1025 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1026 dst->xattr.cmp_op = src->xattr.cmp_op;
1027 dst->xattr.cmp_mode = src->xattr.cmp_mode;
1028 break;
1029 case CEPH_OSD_OP_CREATE:
1030 case CEPH_OSD_OP_DELETE:
1031 break;
1032 case CEPH_OSD_OP_COPY_FROM:
1033 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1034 dst->copy_from.src_version =
1035 cpu_to_le64(src->copy_from.src_version);
1036 dst->copy_from.flags = src->copy_from.flags;
1037 dst->copy_from.src_fadvise_flags =
1038 cpu_to_le32(src->copy_from.src_fadvise_flags);
1039 break;
1040 default:
1041 pr_err("unsupported osd opcode %s\n",
1042 ceph_osd_op_name(src->op));
1043 WARN_ON(1);
1044
1045 return 0;
1046 }
1047
1048 dst->op = cpu_to_le16(src->op);
1049 dst->flags = cpu_to_le32(src->flags);
1050 dst->payload_len = cpu_to_le32(src->indata_len);
1051
1052 return src->indata_len;
1053 }
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1064 struct ceph_file_layout *layout,
1065 struct ceph_vino vino,
1066 u64 off, u64 *plen,
1067 unsigned int which, int num_ops,
1068 int opcode, int flags,
1069 struct ceph_snap_context *snapc,
1070 u32 truncate_seq,
1071 u64 truncate_size,
1072 bool use_mempool)
1073 {
1074 struct ceph_osd_request *req;
1075 u64 objnum = 0;
1076 u64 objoff = 0;
1077 u64 objlen = 0;
1078 int r;
1079
1080 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
1081 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1082 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
1083
1084 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
1085 GFP_NOFS);
1086 if (!req) {
1087 r = -ENOMEM;
1088 goto fail;
1089 }
1090
1091
1092 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
1093 if (r)
1094 goto fail;
1095
1096 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
1097 osd_req_op_init(req, which, opcode, 0);
1098 } else {
1099 u32 object_size = layout->object_size;
1100 u32 object_base = off - objoff;
1101 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1102 if (truncate_size <= object_base) {
1103 truncate_size = 0;
1104 } else {
1105 truncate_size -= object_base;
1106 if (truncate_size > object_size)
1107 truncate_size = object_size;
1108 }
1109 }
1110 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1111 truncate_size, truncate_seq);
1112 }
1113
1114 req->r_flags = flags;
1115 req->r_base_oloc.pool = layout->pool_id;
1116 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1117 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1118
1119 req->r_snapid = vino.snap;
1120 if (flags & CEPH_OSD_FLAG_WRITE)
1121 req->r_data_offset = off;
1122
1123 if (num_ops > 1)
1124
1125
1126
1127
1128
1129 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
1130 else
1131 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
1132 if (r)
1133 goto fail;
1134
1135 return req;
1136
1137 fail:
1138 ceph_osdc_put_request(req);
1139 return ERR_PTR(r);
1140 }
1141 EXPORT_SYMBOL(ceph_osdc_new_request);
1142
1143
1144
1145
1146 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
1147 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
1148
1149
1150
1151
1152 static void for_each_request(struct ceph_osd_client *osdc,
1153 int (*fn)(struct ceph_osd_request *req, void *arg),
1154 void *arg)
1155 {
1156 struct rb_node *n, *p;
1157
1158 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1159 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1160
1161 for (p = rb_first(&osd->o_requests); p; ) {
1162 struct ceph_osd_request *req =
1163 rb_entry(p, struct ceph_osd_request, r_node);
1164
1165 p = rb_next(p);
1166 if (fn(req, arg))
1167 return;
1168 }
1169 }
1170
1171 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1172 struct ceph_osd_request *req =
1173 rb_entry(p, struct ceph_osd_request, r_node);
1174
1175 p = rb_next(p);
1176 if (fn(req, arg))
1177 return;
1178 }
1179 }
1180
1181 static bool osd_homeless(struct ceph_osd *osd)
1182 {
1183 return osd->o_osd == CEPH_HOMELESS_OSD;
1184 }
1185
1186 static bool osd_registered(struct ceph_osd *osd)
1187 {
1188 verify_osdc_locked(osd->o_osdc);
1189
1190 return !RB_EMPTY_NODE(&osd->o_node);
1191 }
1192
1193
1194
1195
1196 static void osd_init(struct ceph_osd *osd)
1197 {
1198 refcount_set(&osd->o_ref, 1);
1199 RB_CLEAR_NODE(&osd->o_node);
1200 osd->o_requests = RB_ROOT;
1201 osd->o_linger_requests = RB_ROOT;
1202 osd->o_backoff_mappings = RB_ROOT;
1203 osd->o_backoffs_by_id = RB_ROOT;
1204 INIT_LIST_HEAD(&osd->o_osd_lru);
1205 INIT_LIST_HEAD(&osd->o_keepalive_item);
1206 osd->o_incarnation = 1;
1207 mutex_init(&osd->lock);
1208 }
1209
1210 static void osd_cleanup(struct ceph_osd *osd)
1211 {
1212 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1213 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1214 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1215 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1216 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1217 WARN_ON(!list_empty(&osd->o_osd_lru));
1218 WARN_ON(!list_empty(&osd->o_keepalive_item));
1219
1220 if (osd->o_auth.authorizer) {
1221 WARN_ON(osd_homeless(osd));
1222 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1223 }
1224 }
1225
1226
1227
1228
1229 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1230 {
1231 struct ceph_osd *osd;
1232
1233 WARN_ON(onum == CEPH_HOMELESS_OSD);
1234
1235 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1236 osd_init(osd);
1237 osd->o_osdc = osdc;
1238 osd->o_osd = onum;
1239
1240 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1241
1242 return osd;
1243 }
1244
1245 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1246 {
1247 if (refcount_inc_not_zero(&osd->o_ref)) {
1248 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1249 refcount_read(&osd->o_ref));
1250 return osd;
1251 } else {
1252 dout("get_osd %p FAIL\n", osd);
1253 return NULL;
1254 }
1255 }
1256
1257 static void put_osd(struct ceph_osd *osd)
1258 {
1259 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1260 refcount_read(&osd->o_ref) - 1);
1261 if (refcount_dec_and_test(&osd->o_ref)) {
1262 osd_cleanup(osd);
1263 kfree(osd);
1264 }
1265 }
1266
1267 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1268
1269 static void __move_osd_to_lru(struct ceph_osd *osd)
1270 {
1271 struct ceph_osd_client *osdc = osd->o_osdc;
1272
1273 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1274 BUG_ON(!list_empty(&osd->o_osd_lru));
1275
1276 spin_lock(&osdc->osd_lru_lock);
1277 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1278 spin_unlock(&osdc->osd_lru_lock);
1279
1280 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1281 }
1282
1283 static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1284 {
1285 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1286 RB_EMPTY_ROOT(&osd->o_linger_requests))
1287 __move_osd_to_lru(osd);
1288 }
1289
1290 static void __remove_osd_from_lru(struct ceph_osd *osd)
1291 {
1292 struct ceph_osd_client *osdc = osd->o_osdc;
1293
1294 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1295
1296 spin_lock(&osdc->osd_lru_lock);
1297 if (!list_empty(&osd->o_osd_lru))
1298 list_del_init(&osd->o_osd_lru);
1299 spin_unlock(&osdc->osd_lru_lock);
1300 }
1301
1302
1303
1304
1305
1306 static void close_osd(struct ceph_osd *osd)
1307 {
1308 struct ceph_osd_client *osdc = osd->o_osdc;
1309 struct rb_node *n;
1310
1311 verify_osdc_wrlocked(osdc);
1312 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1313
1314 ceph_con_close(&osd->o_con);
1315
1316 for (n = rb_first(&osd->o_requests); n; ) {
1317 struct ceph_osd_request *req =
1318 rb_entry(n, struct ceph_osd_request, r_node);
1319
1320 n = rb_next(n);
1321
1322 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1323 unlink_request(osd, req);
1324 link_request(&osdc->homeless_osd, req);
1325 }
1326 for (n = rb_first(&osd->o_linger_requests); n; ) {
1327 struct ceph_osd_linger_request *lreq =
1328 rb_entry(n, struct ceph_osd_linger_request, node);
1329
1330 n = rb_next(n);
1331
1332 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1333 lreq->linger_id);
1334 unlink_linger(osd, lreq);
1335 link_linger(&osdc->homeless_osd, lreq);
1336 }
1337 clear_backoffs(osd);
1338
1339 __remove_osd_from_lru(osd);
1340 erase_osd(&osdc->osds, osd);
1341 put_osd(osd);
1342 }
1343
1344
1345
1346
1347 static int reopen_osd(struct ceph_osd *osd)
1348 {
1349 struct ceph_entity_addr *peer_addr;
1350
1351 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1352
1353 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1354 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1355 close_osd(osd);
1356 return -ENODEV;
1357 }
1358
1359 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1360 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1361 !ceph_con_opened(&osd->o_con)) {
1362 struct rb_node *n;
1363
1364 dout("osd addr hasn't changed and connection never opened, "
1365 "letting msgr retry\n");
1366
1367 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1368 struct ceph_osd_request *req =
1369 rb_entry(n, struct ceph_osd_request, r_node);
1370 req->r_stamp = jiffies;
1371 }
1372
1373 return -EAGAIN;
1374 }
1375
1376 ceph_con_close(&osd->o_con);
1377 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1378 osd->o_incarnation++;
1379
1380 return 0;
1381 }
1382
1383 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1384 bool wrlocked)
1385 {
1386 struct ceph_osd *osd;
1387
1388 if (wrlocked)
1389 verify_osdc_wrlocked(osdc);
1390 else
1391 verify_osdc_locked(osdc);
1392
1393 if (o != CEPH_HOMELESS_OSD)
1394 osd = lookup_osd(&osdc->osds, o);
1395 else
1396 osd = &osdc->homeless_osd;
1397 if (!osd) {
1398 if (!wrlocked)
1399 return ERR_PTR(-EAGAIN);
1400
1401 osd = create_osd(osdc, o);
1402 insert_osd(&osdc->osds, osd);
1403 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1404 &osdc->osdmap->osd_addr[osd->o_osd]);
1405 }
1406
1407 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1408 return osd;
1409 }
1410
1411
1412
1413
1414
1415
1416 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1417 {
1418 verify_osd_locked(osd);
1419 WARN_ON(!req->r_tid || req->r_osd);
1420 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1421 req, req->r_tid);
1422
1423 if (!osd_homeless(osd))
1424 __remove_osd_from_lru(osd);
1425 else
1426 atomic_inc(&osd->o_osdc->num_homeless);
1427
1428 get_osd(osd);
1429 insert_request(&osd->o_requests, req);
1430 req->r_osd = osd;
1431 }
1432
1433 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1434 {
1435 verify_osd_locked(osd);
1436 WARN_ON(req->r_osd != osd);
1437 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1438 req, req->r_tid);
1439
1440 req->r_osd = NULL;
1441 erase_request(&osd->o_requests, req);
1442 put_osd(osd);
1443
1444 if (!osd_homeless(osd))
1445 maybe_move_osd_to_lru(osd);
1446 else
1447 atomic_dec(&osd->o_osdc->num_homeless);
1448 }
1449
1450 static bool __pool_full(struct ceph_pg_pool_info *pi)
1451 {
1452 return pi->flags & CEPH_POOL_FLAG_FULL;
1453 }
1454
1455 static bool have_pool_full(struct ceph_osd_client *osdc)
1456 {
1457 struct rb_node *n;
1458
1459 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1460 struct ceph_pg_pool_info *pi =
1461 rb_entry(n, struct ceph_pg_pool_info, node);
1462
1463 if (__pool_full(pi))
1464 return true;
1465 }
1466
1467 return false;
1468 }
1469
1470 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1471 {
1472 struct ceph_pg_pool_info *pi;
1473
1474 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1475 if (!pi)
1476 return false;
1477
1478 return __pool_full(pi);
1479 }
1480
1481
1482
1483
1484
1485 static bool target_should_be_paused(struct ceph_osd_client *osdc,
1486 const struct ceph_osd_request_target *t,
1487 struct ceph_pg_pool_info *pi)
1488 {
1489 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1490 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1491 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1492 __pool_full(pi);
1493
1494 WARN_ON(pi->id != t->target_oloc.pool);
1495 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1496 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1497 (osdc->osdmap->epoch < osdc->epoch_barrier);
1498 }
1499
1500 enum calc_target_result {
1501 CALC_TARGET_NO_ACTION = 0,
1502 CALC_TARGET_NEED_RESEND,
1503 CALC_TARGET_POOL_DNE,
1504 };
1505
1506 static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1507 struct ceph_osd_request_target *t,
1508 bool any_change)
1509 {
1510 struct ceph_pg_pool_info *pi;
1511 struct ceph_pg pgid, last_pgid;
1512 struct ceph_osds up, acting;
1513 bool force_resend = false;
1514 bool unpaused = false;
1515 bool legacy_change = false;
1516 bool split = false;
1517 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1518 bool recovery_deletes = ceph_osdmap_flag(osdc,
1519 CEPH_OSDMAP_RECOVERY_DELETES);
1520 enum calc_target_result ct_res;
1521
1522 t->epoch = osdc->osdmap->epoch;
1523 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1524 if (!pi) {
1525 t->osd = CEPH_HOMELESS_OSD;
1526 ct_res = CALC_TARGET_POOL_DNE;
1527 goto out;
1528 }
1529
1530 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1531 if (t->last_force_resend < pi->last_force_request_resend) {
1532 t->last_force_resend = pi->last_force_request_resend;
1533 force_resend = true;
1534 } else if (t->last_force_resend == 0) {
1535 force_resend = true;
1536 }
1537 }
1538
1539
1540 ceph_oid_copy(&t->target_oid, &t->base_oid);
1541 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1542 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1543 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1544 t->target_oloc.pool = pi->read_tier;
1545 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1546 t->target_oloc.pool = pi->write_tier;
1547
1548 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1549 if (!pi) {
1550 t->osd = CEPH_HOMELESS_OSD;
1551 ct_res = CALC_TARGET_POOL_DNE;
1552 goto out;
1553 }
1554 }
1555
1556 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
1557 last_pgid.pool = pgid.pool;
1558 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1559
1560 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1561 if (any_change &&
1562 ceph_is_new_interval(&t->acting,
1563 &acting,
1564 &t->up,
1565 &up,
1566 t->size,
1567 pi->size,
1568 t->min_size,
1569 pi->min_size,
1570 t->pg_num,
1571 pi->pg_num,
1572 t->sort_bitwise,
1573 sort_bitwise,
1574 t->recovery_deletes,
1575 recovery_deletes,
1576 &last_pgid))
1577 force_resend = true;
1578
1579 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1580 t->paused = false;
1581 unpaused = true;
1582 }
1583 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1584 ceph_osds_changed(&t->acting, &acting, any_change);
1585 if (t->pg_num)
1586 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1587
1588 if (legacy_change || force_resend || split) {
1589 t->pgid = pgid;
1590 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1591 ceph_osds_copy(&t->acting, &acting);
1592 ceph_osds_copy(&t->up, &up);
1593 t->size = pi->size;
1594 t->min_size = pi->min_size;
1595 t->pg_num = pi->pg_num;
1596 t->pg_num_mask = pi->pg_num_mask;
1597 t->sort_bitwise = sort_bitwise;
1598 t->recovery_deletes = recovery_deletes;
1599
1600 t->osd = acting.primary;
1601 }
1602
1603 if (unpaused || legacy_change || force_resend || split)
1604 ct_res = CALC_TARGET_NEED_RESEND;
1605 else
1606 ct_res = CALC_TARGET_NO_ACTION;
1607
1608 out:
1609 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1610 legacy_change, force_resend, split, ct_res, t->osd);
1611 return ct_res;
1612 }
1613
1614 static struct ceph_spg_mapping *alloc_spg_mapping(void)
1615 {
1616 struct ceph_spg_mapping *spg;
1617
1618 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1619 if (!spg)
1620 return NULL;
1621
1622 RB_CLEAR_NODE(&spg->node);
1623 spg->backoffs = RB_ROOT;
1624 return spg;
1625 }
1626
1627 static void free_spg_mapping(struct ceph_spg_mapping *spg)
1628 {
1629 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1630 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1631
1632 kfree(spg);
1633 }
1634
1635
1636
1637
1638
1639
1640
1641 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1642 RB_BYPTR, const struct ceph_spg *, node)
1643
1644 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1645 {
1646 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1647 }
1648
1649 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1650 void **pkey, size_t *pkey_len)
1651 {
1652 if (hoid->key_len) {
1653 *pkey = hoid->key;
1654 *pkey_len = hoid->key_len;
1655 } else {
1656 *pkey = hoid->oid;
1657 *pkey_len = hoid->oid_len;
1658 }
1659 }
1660
1661 static int compare_names(const void *name1, size_t name1_len,
1662 const void *name2, size_t name2_len)
1663 {
1664 int ret;
1665
1666 ret = memcmp(name1, name2, min(name1_len, name2_len));
1667 if (!ret) {
1668 if (name1_len < name2_len)
1669 ret = -1;
1670 else if (name1_len > name2_len)
1671 ret = 1;
1672 }
1673 return ret;
1674 }
1675
1676 static int hoid_compare(const struct ceph_hobject_id *lhs,
1677 const struct ceph_hobject_id *rhs)
1678 {
1679 void *effective_key1, *effective_key2;
1680 size_t effective_key1_len, effective_key2_len;
1681 int ret;
1682
1683 if (lhs->is_max < rhs->is_max)
1684 return -1;
1685 if (lhs->is_max > rhs->is_max)
1686 return 1;
1687
1688 if (lhs->pool < rhs->pool)
1689 return -1;
1690 if (lhs->pool > rhs->pool)
1691 return 1;
1692
1693 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1694 return -1;
1695 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1696 return 1;
1697
1698 ret = compare_names(lhs->nspace, lhs->nspace_len,
1699 rhs->nspace, rhs->nspace_len);
1700 if (ret)
1701 return ret;
1702
1703 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1704 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1705 ret = compare_names(effective_key1, effective_key1_len,
1706 effective_key2, effective_key2_len);
1707 if (ret)
1708 return ret;
1709
1710 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1711 if (ret)
1712 return ret;
1713
1714 if (lhs->snapid < rhs->snapid)
1715 return -1;
1716 if (lhs->snapid > rhs->snapid)
1717 return 1;
1718
1719 return 0;
1720 }
1721
1722
1723
1724
1725
1726
1727
1728 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1729 {
1730 u8 struct_v;
1731 u32 struct_len;
1732 int ret;
1733
1734 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1735 &struct_len);
1736 if (ret)
1737 return ret;
1738
1739 if (struct_v < 4) {
1740 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1741 goto e_inval;
1742 }
1743
1744 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1745 GFP_NOIO);
1746 if (IS_ERR(hoid->key)) {
1747 ret = PTR_ERR(hoid->key);
1748 hoid->key = NULL;
1749 return ret;
1750 }
1751
1752 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1753 GFP_NOIO);
1754 if (IS_ERR(hoid->oid)) {
1755 ret = PTR_ERR(hoid->oid);
1756 hoid->oid = NULL;
1757 return ret;
1758 }
1759
1760 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1761 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1762 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1763
1764 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1765 GFP_NOIO);
1766 if (IS_ERR(hoid->nspace)) {
1767 ret = PTR_ERR(hoid->nspace);
1768 hoid->nspace = NULL;
1769 return ret;
1770 }
1771
1772 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1773
1774 ceph_hoid_build_hash_cache(hoid);
1775 return 0;
1776
1777 e_inval:
1778 return -EINVAL;
1779 }
1780
1781 static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1782 {
1783 return 8 + 4 + 1 + 8 +
1784 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1785 }
1786
1787 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1788 {
1789 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1790 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1791 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1792 ceph_encode_64(p, hoid->snapid);
1793 ceph_encode_32(p, hoid->hash);
1794 ceph_encode_8(p, hoid->is_max);
1795 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1796 ceph_encode_64(p, hoid->pool);
1797 }
1798
1799 static void free_hoid(struct ceph_hobject_id *hoid)
1800 {
1801 if (hoid) {
1802 kfree(hoid->key);
1803 kfree(hoid->oid);
1804 kfree(hoid->nspace);
1805 kfree(hoid);
1806 }
1807 }
1808
1809 static struct ceph_osd_backoff *alloc_backoff(void)
1810 {
1811 struct ceph_osd_backoff *backoff;
1812
1813 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1814 if (!backoff)
1815 return NULL;
1816
1817 RB_CLEAR_NODE(&backoff->spg_node);
1818 RB_CLEAR_NODE(&backoff->id_node);
1819 return backoff;
1820 }
1821
1822 static void free_backoff(struct ceph_osd_backoff *backoff)
1823 {
1824 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1825 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1826
1827 free_hoid(backoff->begin);
1828 free_hoid(backoff->end);
1829 kfree(backoff);
1830 }
1831
1832
1833
1834
1835 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1836 RB_BYVAL, spg_node);
1837
1838 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1839 const struct ceph_hobject_id *hoid)
1840 {
1841 struct rb_node *n = root->rb_node;
1842
1843 while (n) {
1844 struct ceph_osd_backoff *cur =
1845 rb_entry(n, struct ceph_osd_backoff, spg_node);
1846 int cmp;
1847
1848 cmp = hoid_compare(hoid, cur->begin);
1849 if (cmp < 0) {
1850 n = n->rb_left;
1851 } else if (cmp > 0) {
1852 if (hoid_compare(hoid, cur->end) < 0)
1853 return cur;
1854
1855 n = n->rb_right;
1856 } else {
1857 return cur;
1858 }
1859 }
1860
1861 return NULL;
1862 }
1863
1864
1865
1866
1867 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1868
1869 static void clear_backoffs(struct ceph_osd *osd)
1870 {
1871 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1872 struct ceph_spg_mapping *spg =
1873 rb_entry(rb_first(&osd->o_backoff_mappings),
1874 struct ceph_spg_mapping, node);
1875
1876 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1877 struct ceph_osd_backoff *backoff =
1878 rb_entry(rb_first(&spg->backoffs),
1879 struct ceph_osd_backoff, spg_node);
1880
1881 erase_backoff(&spg->backoffs, backoff);
1882 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1883 free_backoff(backoff);
1884 }
1885 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1886 free_spg_mapping(spg);
1887 }
1888 }
1889
1890
1891
1892
1893 static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1894 const struct ceph_osd_request_target *t)
1895 {
1896 hoid->key = NULL;
1897 hoid->key_len = 0;
1898 hoid->oid = t->target_oid.name;
1899 hoid->oid_len = t->target_oid.name_len;
1900 hoid->snapid = CEPH_NOSNAP;
1901 hoid->hash = t->pgid.seed;
1902 hoid->is_max = false;
1903 if (t->target_oloc.pool_ns) {
1904 hoid->nspace = t->target_oloc.pool_ns->str;
1905 hoid->nspace_len = t->target_oloc.pool_ns->len;
1906 } else {
1907 hoid->nspace = NULL;
1908 hoid->nspace_len = 0;
1909 }
1910 hoid->pool = t->target_oloc.pool;
1911 ceph_hoid_build_hash_cache(hoid);
1912 }
1913
1914 static bool should_plug_request(struct ceph_osd_request *req)
1915 {
1916 struct ceph_osd *osd = req->r_osd;
1917 struct ceph_spg_mapping *spg;
1918 struct ceph_osd_backoff *backoff;
1919 struct ceph_hobject_id hoid;
1920
1921 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1922 if (!spg)
1923 return false;
1924
1925 hoid_fill_from_target(&hoid, &req->r_t);
1926 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1927 if (!backoff)
1928 return false;
1929
1930 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1931 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1932 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1933 return true;
1934 }
1935
1936
1937
1938
1939 static void setup_request_data(struct ceph_osd_request *req)
1940 {
1941 struct ceph_msg *request_msg = req->r_request;
1942 struct ceph_msg *reply_msg = req->r_reply;
1943 struct ceph_osd_req_op *op;
1944
1945 if (req->r_request->num_data_items || req->r_reply->num_data_items)
1946 return;
1947
1948 WARN_ON(request_msg->data_length || reply_msg->data_length);
1949 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
1950 switch (op->op) {
1951
1952 case CEPH_OSD_OP_WRITE:
1953 case CEPH_OSD_OP_WRITEFULL:
1954 WARN_ON(op->indata_len != op->extent.length);
1955 ceph_osdc_msg_data_add(request_msg,
1956 &op->extent.osd_data);
1957 break;
1958 case CEPH_OSD_OP_SETXATTR:
1959 case CEPH_OSD_OP_CMPXATTR:
1960 WARN_ON(op->indata_len != op->xattr.name_len +
1961 op->xattr.value_len);
1962 ceph_osdc_msg_data_add(request_msg,
1963 &op->xattr.osd_data);
1964 break;
1965 case CEPH_OSD_OP_NOTIFY_ACK:
1966 ceph_osdc_msg_data_add(request_msg,
1967 &op->notify_ack.request_data);
1968 break;
1969 case CEPH_OSD_OP_COPY_FROM:
1970 ceph_osdc_msg_data_add(request_msg,
1971 &op->copy_from.osd_data);
1972 break;
1973
1974
1975 case CEPH_OSD_OP_STAT:
1976 ceph_osdc_msg_data_add(reply_msg,
1977 &op->raw_data_in);
1978 break;
1979 case CEPH_OSD_OP_READ:
1980 ceph_osdc_msg_data_add(reply_msg,
1981 &op->extent.osd_data);
1982 break;
1983 case CEPH_OSD_OP_LIST_WATCHERS:
1984 ceph_osdc_msg_data_add(reply_msg,
1985 &op->list_watchers.response_data);
1986 break;
1987
1988
1989 case CEPH_OSD_OP_CALL:
1990 WARN_ON(op->indata_len != op->cls.class_len +
1991 op->cls.method_len +
1992 op->cls.indata_len);
1993 ceph_osdc_msg_data_add(request_msg,
1994 &op->cls.request_info);
1995
1996 ceph_osdc_msg_data_add(request_msg,
1997 &op->cls.request_data);
1998
1999 ceph_osdc_msg_data_add(reply_msg,
2000 &op->cls.response_data);
2001 break;
2002 case CEPH_OSD_OP_NOTIFY:
2003 ceph_osdc_msg_data_add(request_msg,
2004 &op->notify.request_data);
2005 ceph_osdc_msg_data_add(reply_msg,
2006 &op->notify.response_data);
2007 break;
2008 }
2009 }
2010 }
2011
2012 static void encode_pgid(void **p, const struct ceph_pg *pgid)
2013 {
2014 ceph_encode_8(p, 1);
2015 ceph_encode_64(p, pgid->pool);
2016 ceph_encode_32(p, pgid->seed);
2017 ceph_encode_32(p, -1);
2018 }
2019
2020 static void encode_spgid(void **p, const struct ceph_spg *spgid)
2021 {
2022 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2023 encode_pgid(p, &spgid->pgid);
2024 ceph_encode_8(p, spgid->shard);
2025 }
2026
2027 static void encode_oloc(void **p, void *end,
2028 const struct ceph_object_locator *oloc)
2029 {
2030 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2031 ceph_encode_64(p, oloc->pool);
2032 ceph_encode_32(p, -1);
2033 ceph_encode_32(p, 0);
2034 if (oloc->pool_ns)
2035 ceph_encode_string(p, end, oloc->pool_ns->str,
2036 oloc->pool_ns->len);
2037 else
2038 ceph_encode_32(p, 0);
2039 }
2040
2041 static void encode_request_partial(struct ceph_osd_request *req,
2042 struct ceph_msg *msg)
2043 {
2044 void *p = msg->front.iov_base;
2045 void *const end = p + msg->front_alloc_len;
2046 u32 data_len = 0;
2047 int i;
2048
2049 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2050
2051 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2052 } else {
2053 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2054 req->r_data_offset || req->r_snapc);
2055 }
2056
2057 setup_request_data(req);
2058
2059 encode_spgid(&p, &req->r_t.spgid);
2060 ceph_encode_32(&p, req->r_t.pgid.seed);
2061 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2062 ceph_encode_32(&p, req->r_flags);
2063
2064
2065 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2066 memset(p, 0, sizeof(struct ceph_osd_reqid));
2067 p += sizeof(struct ceph_osd_reqid);
2068
2069
2070 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2071 p += sizeof(struct ceph_blkin_trace_info);
2072
2073 ceph_encode_32(&p, 0);
2074 ceph_encode_timespec64(p, &req->r_mtime);
2075 p += sizeof(struct ceph_timespec);
2076
2077 encode_oloc(&p, end, &req->r_t.target_oloc);
2078 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2079 req->r_t.target_oid.name_len);
2080
2081
2082 ceph_encode_16(&p, req->r_num_ops);
2083 for (i = 0; i < req->r_num_ops; i++) {
2084 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2085 p += sizeof(struct ceph_osd_op);
2086 }
2087
2088 ceph_encode_64(&p, req->r_snapid);
2089 if (req->r_snapc) {
2090 ceph_encode_64(&p, req->r_snapc->seq);
2091 ceph_encode_32(&p, req->r_snapc->num_snaps);
2092 for (i = 0; i < req->r_snapc->num_snaps; i++)
2093 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2094 } else {
2095 ceph_encode_64(&p, 0);
2096 ceph_encode_32(&p, 0);
2097 }
2098
2099 ceph_encode_32(&p, req->r_attempts);
2100 BUG_ON(p > end - 8);
2101
2102 msg->hdr.version = cpu_to_le16(8);
2103
2104 msg->front.iov_len = p - msg->front.iov_base;
2105 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2106 msg->hdr.data_len = cpu_to_le32(data_len);
2107
2108
2109
2110
2111
2112 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
2113
2114 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2115 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2116 }
2117
2118 static void encode_request_finish(struct ceph_msg *msg)
2119 {
2120 void *p = msg->front.iov_base;
2121 void *const partial_end = p + msg->front.iov_len;
2122 void *const end = p + msg->front_alloc_len;
2123
2124 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2125
2126 p = partial_end;
2127 ceph_encode_64(&p, msg->con->peer_features);
2128 } else {
2129 struct {
2130 char spgid[CEPH_ENCODING_START_BLK_LEN +
2131 CEPH_PGID_ENCODING_LEN + 1];
2132 __le32 hash;
2133 __le32 epoch;
2134 __le32 flags;
2135 char reqid[CEPH_ENCODING_START_BLK_LEN +
2136 sizeof(struct ceph_osd_reqid)];
2137 char trace[sizeof(struct ceph_blkin_trace_info)];
2138 __le32 client_inc;
2139 struct ceph_timespec mtime;
2140 } __packed head;
2141 struct ceph_pg pgid;
2142 void *oloc, *oid, *tail;
2143 int oloc_len, oid_len, tail_len;
2144 int len;
2145
2146
2147
2148
2149
2150
2151
2152 memcpy(&head, p, sizeof(head));
2153 p += sizeof(head);
2154
2155 oloc = p;
2156 p += CEPH_ENCODING_START_BLK_LEN;
2157 pgid.pool = ceph_decode_64(&p);
2158 p += 4 + 4;
2159 len = ceph_decode_32(&p);
2160 p += len;
2161 oloc_len = p - oloc;
2162
2163 oid = p;
2164 len = ceph_decode_32(&p);
2165 p += len;
2166 oid_len = p - oid;
2167
2168 tail = p;
2169 tail_len = partial_end - p;
2170
2171 p = msg->front.iov_base;
2172 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2173 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2174 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2175 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2176
2177
2178 memset(p, 0, sizeof(struct ceph_eversion));
2179 p += sizeof(struct ceph_eversion);
2180
2181 BUG_ON(p >= oloc);
2182 memmove(p, oloc, oloc_len);
2183 p += oloc_len;
2184
2185 pgid.seed = le32_to_cpu(head.hash);
2186 encode_pgid(&p, &pgid);
2187
2188 BUG_ON(p >= oid);
2189 memmove(p, oid, oid_len);
2190 p += oid_len;
2191
2192
2193 BUG_ON(p >= tail);
2194 memmove(p, tail, tail_len);
2195 p += tail_len;
2196
2197 msg->hdr.version = cpu_to_le16(4);
2198 }
2199
2200 BUG_ON(p > end);
2201 msg->front.iov_len = p - msg->front.iov_base;
2202 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2203
2204 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2205 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2206 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2207 le16_to_cpu(msg->hdr.version));
2208 }
2209
2210
2211
2212
2213 static void send_request(struct ceph_osd_request *req)
2214 {
2215 struct ceph_osd *osd = req->r_osd;
2216
2217 verify_osd_locked(osd);
2218 WARN_ON(osd->o_osd != req->r_t.osd);
2219
2220
2221 if (should_plug_request(req))
2222 return;
2223
2224
2225
2226
2227
2228 if (req->r_sent)
2229 ceph_msg_revoke(req->r_request);
2230
2231 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2232 if (req->r_attempts)
2233 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2234 else
2235 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2236
2237 encode_request_partial(req, req->r_request);
2238
2239 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2240 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2241 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2242 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2243 req->r_attempts);
2244
2245 req->r_t.paused = false;
2246 req->r_stamp = jiffies;
2247 req->r_attempts++;
2248
2249 req->r_sent = osd->o_incarnation;
2250 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2251 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
2252 }
2253
2254 static void maybe_request_map(struct ceph_osd_client *osdc)
2255 {
2256 bool continuous = false;
2257
2258 verify_osdc_locked(osdc);
2259 WARN_ON(!osdc->osdmap->epoch);
2260
2261 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2262 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2263 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2264 dout("%s osdc %p continuous\n", __func__, osdc);
2265 continuous = true;
2266 } else {
2267 dout("%s osdc %p onetime\n", __func__, osdc);
2268 }
2269
2270 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2271 osdc->osdmap->epoch + 1, continuous))
2272 ceph_monc_renew_subs(&osdc->client->monc);
2273 }
2274
2275 static void complete_request(struct ceph_osd_request *req, int err);
2276 static void send_map_check(struct ceph_osd_request *req);
2277
2278 static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2279 {
2280 struct ceph_osd_client *osdc = req->r_osdc;
2281 struct ceph_osd *osd;
2282 enum calc_target_result ct_res;
2283 int err = 0;
2284 bool need_send = false;
2285 bool promoted = false;
2286
2287 WARN_ON(req->r_tid);
2288 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2289
2290 again:
2291 ct_res = calc_target(osdc, &req->r_t, false);
2292 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2293 goto promote;
2294
2295 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2296 if (IS_ERR(osd)) {
2297 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2298 goto promote;
2299 }
2300
2301 if (osdc->abort_err) {
2302 dout("req %p abort_err %d\n", req, osdc->abort_err);
2303 err = osdc->abort_err;
2304 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2305 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2306 osdc->epoch_barrier);
2307 req->r_t.paused = true;
2308 maybe_request_map(osdc);
2309 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2310 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2311 dout("req %p pausewr\n", req);
2312 req->r_t.paused = true;
2313 maybe_request_map(osdc);
2314 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2315 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2316 dout("req %p pauserd\n", req);
2317 req->r_t.paused = true;
2318 maybe_request_map(osdc);
2319 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2320 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2321 CEPH_OSD_FLAG_FULL_FORCE)) &&
2322 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2323 pool_full(osdc, req->r_t.base_oloc.pool))) {
2324 dout("req %p full/pool_full\n", req);
2325 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
2326 err = -ENOSPC;
2327 } else {
2328 pr_warn_ratelimited("FULL or reached pool quota\n");
2329 req->r_t.paused = true;
2330 maybe_request_map(osdc);
2331 }
2332 } else if (!osd_homeless(osd)) {
2333 need_send = true;
2334 } else {
2335 maybe_request_map(osdc);
2336 }
2337
2338 mutex_lock(&osd->lock);
2339
2340
2341
2342
2343
2344 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2345 link_request(osd, req);
2346 if (need_send)
2347 send_request(req);
2348 else if (err)
2349 complete_request(req, err);
2350 mutex_unlock(&osd->lock);
2351
2352 if (!err && ct_res == CALC_TARGET_POOL_DNE)
2353 send_map_check(req);
2354
2355 if (promoted)
2356 downgrade_write(&osdc->lock);
2357 return;
2358
2359 promote:
2360 up_read(&osdc->lock);
2361 down_write(&osdc->lock);
2362 wrlocked = true;
2363 promoted = true;
2364 goto again;
2365 }
2366
2367 static void account_request(struct ceph_osd_request *req)
2368 {
2369 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
2370 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2371
2372 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2373 atomic_inc(&req->r_osdc->num_requests);
2374
2375 req->r_start_stamp = jiffies;
2376 }
2377
2378 static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2379 {
2380 ceph_osdc_get_request(req);
2381 account_request(req);
2382 __submit_request(req, wrlocked);
2383 }
2384
2385 static void finish_request(struct ceph_osd_request *req)
2386 {
2387 struct ceph_osd_client *osdc = req->r_osdc;
2388
2389 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2390 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2391
2392 if (req->r_osd)
2393 unlink_request(req->r_osd, req);
2394 atomic_dec(&osdc->num_requests);
2395
2396
2397
2398
2399
2400
2401
2402 ceph_msg_revoke(req->r_request);
2403 ceph_msg_revoke_incoming(req->r_reply);
2404 }
2405
2406 static void __complete_request(struct ceph_osd_request *req)
2407 {
2408 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
2409 req->r_tid, req->r_callback, req->r_result);
2410
2411 if (req->r_callback)
2412 req->r_callback(req);
2413 complete_all(&req->r_completion);
2414 ceph_osdc_put_request(req);
2415 }
2416
2417 static void complete_request_workfn(struct work_struct *work)
2418 {
2419 struct ceph_osd_request *req =
2420 container_of(work, struct ceph_osd_request, r_complete_work);
2421
2422 __complete_request(req);
2423 }
2424
2425
2426
2427
2428 static void complete_request(struct ceph_osd_request *req, int err)
2429 {
2430 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2431
2432 req->r_result = err;
2433 finish_request(req);
2434
2435 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2436 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
2437 }
2438
2439 static void cancel_map_check(struct ceph_osd_request *req)
2440 {
2441 struct ceph_osd_client *osdc = req->r_osdc;
2442 struct ceph_osd_request *lookup_req;
2443
2444 verify_osdc_wrlocked(osdc);
2445
2446 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2447 if (!lookup_req)
2448 return;
2449
2450 WARN_ON(lookup_req != req);
2451 erase_request_mc(&osdc->map_checks, req);
2452 ceph_osdc_put_request(req);
2453 }
2454
2455 static void cancel_request(struct ceph_osd_request *req)
2456 {
2457 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2458
2459 cancel_map_check(req);
2460 finish_request(req);
2461 complete_all(&req->r_completion);
2462 ceph_osdc_put_request(req);
2463 }
2464
2465 static void abort_request(struct ceph_osd_request *req, int err)
2466 {
2467 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2468
2469 cancel_map_check(req);
2470 complete_request(req, err);
2471 }
2472
2473 static int abort_fn(struct ceph_osd_request *req, void *arg)
2474 {
2475 int err = *(int *)arg;
2476
2477 abort_request(req, err);
2478 return 0;
2479 }
2480
2481
2482
2483
2484
2485 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2486 {
2487 dout("%s osdc %p err %d\n", __func__, osdc, err);
2488 down_write(&osdc->lock);
2489 for_each_request(osdc, abort_fn, &err);
2490 osdc->abort_err = err;
2491 up_write(&osdc->lock);
2492 }
2493 EXPORT_SYMBOL(ceph_osdc_abort_requests);
2494
2495 void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc)
2496 {
2497 down_write(&osdc->lock);
2498 osdc->abort_err = 0;
2499 up_write(&osdc->lock);
2500 }
2501 EXPORT_SYMBOL(ceph_osdc_clear_abort_err);
2502
2503 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2504 {
2505 if (likely(eb > osdc->epoch_barrier)) {
2506 dout("updating epoch_barrier from %u to %u\n",
2507 osdc->epoch_barrier, eb);
2508 osdc->epoch_barrier = eb;
2509
2510 if (eb > osdc->osdmap->epoch)
2511 maybe_request_map(osdc);
2512 }
2513 }
2514
2515 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2516 {
2517 down_read(&osdc->lock);
2518 if (unlikely(eb > osdc->epoch_barrier)) {
2519 up_read(&osdc->lock);
2520 down_write(&osdc->lock);
2521 update_epoch_barrier(osdc, eb);
2522 up_write(&osdc->lock);
2523 } else {
2524 up_read(&osdc->lock);
2525 }
2526 }
2527 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2528
2529
2530
2531
2532
2533
2534
2535 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2536 {
2537 struct ceph_osd_client *osdc = req->r_osdc;
2538 bool *victims = arg;
2539
2540 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2541 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2542 pool_full(osdc, req->r_t.base_oloc.pool))) {
2543 if (!*victims) {
2544 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2545 *victims = true;
2546 }
2547 abort_request(req, -ENOSPC);
2548 }
2549
2550 return 0;
2551 }
2552
2553
2554
2555
2556
2557
2558
2559 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2560 {
2561 bool victims = false;
2562
2563 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
2564 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
2565 for_each_request(osdc, abort_on_full_fn, &victims);
2566 }
2567
2568 static void check_pool_dne(struct ceph_osd_request *req)
2569 {
2570 struct ceph_osd_client *osdc = req->r_osdc;
2571 struct ceph_osdmap *map = osdc->osdmap;
2572
2573 verify_osdc_wrlocked(osdc);
2574 WARN_ON(!map->epoch);
2575
2576 if (req->r_attempts) {
2577
2578
2579
2580
2581
2582 req->r_map_dne_bound = map->epoch;
2583 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2584 req->r_tid);
2585 } else {
2586 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2587 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2588 }
2589
2590 if (req->r_map_dne_bound) {
2591 if (map->epoch >= req->r_map_dne_bound) {
2592
2593 pr_info_ratelimited("tid %llu pool does not exist\n",
2594 req->r_tid);
2595 complete_request(req, -ENOENT);
2596 }
2597 } else {
2598 send_map_check(req);
2599 }
2600 }
2601
2602 static void map_check_cb(struct ceph_mon_generic_request *greq)
2603 {
2604 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2605 struct ceph_osd_request *req;
2606 u64 tid = greq->private_data;
2607
2608 WARN_ON(greq->result || !greq->u.newest);
2609
2610 down_write(&osdc->lock);
2611 req = lookup_request_mc(&osdc->map_checks, tid);
2612 if (!req) {
2613 dout("%s tid %llu dne\n", __func__, tid);
2614 goto out_unlock;
2615 }
2616
2617 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2618 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2619 if (!req->r_map_dne_bound)
2620 req->r_map_dne_bound = greq->u.newest;
2621 erase_request_mc(&osdc->map_checks, req);
2622 check_pool_dne(req);
2623
2624 ceph_osdc_put_request(req);
2625 out_unlock:
2626 up_write(&osdc->lock);
2627 }
2628
2629 static void send_map_check(struct ceph_osd_request *req)
2630 {
2631 struct ceph_osd_client *osdc = req->r_osdc;
2632 struct ceph_osd_request *lookup_req;
2633 int ret;
2634
2635 verify_osdc_wrlocked(osdc);
2636
2637 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2638 if (lookup_req) {
2639 WARN_ON(lookup_req != req);
2640 return;
2641 }
2642
2643 ceph_osdc_get_request(req);
2644 insert_request_mc(&osdc->map_checks, req);
2645 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2646 map_check_cb, req->r_tid);
2647 WARN_ON(ret);
2648 }
2649
2650
2651
2652
2653 static void linger_release(struct kref *kref)
2654 {
2655 struct ceph_osd_linger_request *lreq =
2656 container_of(kref, struct ceph_osd_linger_request, kref);
2657
2658 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2659 lreq->reg_req, lreq->ping_req);
2660 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2661 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
2662 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2663 WARN_ON(!list_empty(&lreq->scan_item));
2664 WARN_ON(!list_empty(&lreq->pending_lworks));
2665 WARN_ON(lreq->osd);
2666
2667 if (lreq->reg_req)
2668 ceph_osdc_put_request(lreq->reg_req);
2669 if (lreq->ping_req)
2670 ceph_osdc_put_request(lreq->ping_req);
2671 target_destroy(&lreq->t);
2672 kfree(lreq);
2673 }
2674
2675 static void linger_put(struct ceph_osd_linger_request *lreq)
2676 {
2677 if (lreq)
2678 kref_put(&lreq->kref, linger_release);
2679 }
2680
2681 static struct ceph_osd_linger_request *
2682 linger_get(struct ceph_osd_linger_request *lreq)
2683 {
2684 kref_get(&lreq->kref);
2685 return lreq;
2686 }
2687
2688 static struct ceph_osd_linger_request *
2689 linger_alloc(struct ceph_osd_client *osdc)
2690 {
2691 struct ceph_osd_linger_request *lreq;
2692
2693 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2694 if (!lreq)
2695 return NULL;
2696
2697 kref_init(&lreq->kref);
2698 mutex_init(&lreq->lock);
2699 RB_CLEAR_NODE(&lreq->node);
2700 RB_CLEAR_NODE(&lreq->osdc_node);
2701 RB_CLEAR_NODE(&lreq->mc_node);
2702 INIT_LIST_HEAD(&lreq->scan_item);
2703 INIT_LIST_HEAD(&lreq->pending_lworks);
2704 init_completion(&lreq->reg_commit_wait);
2705 init_completion(&lreq->notify_finish_wait);
2706
2707 lreq->osdc = osdc;
2708 target_init(&lreq->t);
2709
2710 dout("%s lreq %p\n", __func__, lreq);
2711 return lreq;
2712 }
2713
2714 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2715 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
2716 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2717
2718
2719
2720
2721
2722
2723 static void link_linger(struct ceph_osd *osd,
2724 struct ceph_osd_linger_request *lreq)
2725 {
2726 verify_osd_locked(osd);
2727 WARN_ON(!lreq->linger_id || lreq->osd);
2728 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2729 osd->o_osd, lreq, lreq->linger_id);
2730
2731 if (!osd_homeless(osd))
2732 __remove_osd_from_lru(osd);
2733 else
2734 atomic_inc(&osd->o_osdc->num_homeless);
2735
2736 get_osd(osd);
2737 insert_linger(&osd->o_linger_requests, lreq);
2738 lreq->osd = osd;
2739 }
2740
2741 static void unlink_linger(struct ceph_osd *osd,
2742 struct ceph_osd_linger_request *lreq)
2743 {
2744 verify_osd_locked(osd);
2745 WARN_ON(lreq->osd != osd);
2746 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2747 osd->o_osd, lreq, lreq->linger_id);
2748
2749 lreq->osd = NULL;
2750 erase_linger(&osd->o_linger_requests, lreq);
2751 put_osd(osd);
2752
2753 if (!osd_homeless(osd))
2754 maybe_move_osd_to_lru(osd);
2755 else
2756 atomic_dec(&osd->o_osdc->num_homeless);
2757 }
2758
2759 static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2760 {
2761 verify_osdc_locked(lreq->osdc);
2762
2763 return !RB_EMPTY_NODE(&lreq->osdc_node);
2764 }
2765
2766 static bool linger_registered(struct ceph_osd_linger_request *lreq)
2767 {
2768 struct ceph_osd_client *osdc = lreq->osdc;
2769 bool registered;
2770
2771 down_read(&osdc->lock);
2772 registered = __linger_registered(lreq);
2773 up_read(&osdc->lock);
2774
2775 return registered;
2776 }
2777
2778 static void linger_register(struct ceph_osd_linger_request *lreq)
2779 {
2780 struct ceph_osd_client *osdc = lreq->osdc;
2781
2782 verify_osdc_wrlocked(osdc);
2783 WARN_ON(lreq->linger_id);
2784
2785 linger_get(lreq);
2786 lreq->linger_id = ++osdc->last_linger_id;
2787 insert_linger_osdc(&osdc->linger_requests, lreq);
2788 }
2789
2790 static void linger_unregister(struct ceph_osd_linger_request *lreq)
2791 {
2792 struct ceph_osd_client *osdc = lreq->osdc;
2793
2794 verify_osdc_wrlocked(osdc);
2795
2796 erase_linger_osdc(&osdc->linger_requests, lreq);
2797 linger_put(lreq);
2798 }
2799
2800 static void cancel_linger_request(struct ceph_osd_request *req)
2801 {
2802 struct ceph_osd_linger_request *lreq = req->r_priv;
2803
2804 WARN_ON(!req->r_linger);
2805 cancel_request(req);
2806 linger_put(lreq);
2807 }
2808
2809 struct linger_work {
2810 struct work_struct work;
2811 struct ceph_osd_linger_request *lreq;
2812 struct list_head pending_item;
2813 unsigned long queued_stamp;
2814
2815 union {
2816 struct {
2817 u64 notify_id;
2818 u64 notifier_id;
2819 void *payload;
2820 size_t payload_len;
2821
2822 struct ceph_msg *msg;
2823 } notify;
2824 struct {
2825 int err;
2826 } error;
2827 };
2828 };
2829
2830 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2831 work_func_t workfn)
2832 {
2833 struct linger_work *lwork;
2834
2835 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2836 if (!lwork)
2837 return NULL;
2838
2839 INIT_WORK(&lwork->work, workfn);
2840 INIT_LIST_HEAD(&lwork->pending_item);
2841 lwork->lreq = linger_get(lreq);
2842
2843 return lwork;
2844 }
2845
2846 static void lwork_free(struct linger_work *lwork)
2847 {
2848 struct ceph_osd_linger_request *lreq = lwork->lreq;
2849
2850 mutex_lock(&lreq->lock);
2851 list_del(&lwork->pending_item);
2852 mutex_unlock(&lreq->lock);
2853
2854 linger_put(lreq);
2855 kfree(lwork);
2856 }
2857
2858 static void lwork_queue(struct linger_work *lwork)
2859 {
2860 struct ceph_osd_linger_request *lreq = lwork->lreq;
2861 struct ceph_osd_client *osdc = lreq->osdc;
2862
2863 verify_lreq_locked(lreq);
2864 WARN_ON(!list_empty(&lwork->pending_item));
2865
2866 lwork->queued_stamp = jiffies;
2867 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2868 queue_work(osdc->notify_wq, &lwork->work);
2869 }
2870
2871 static void do_watch_notify(struct work_struct *w)
2872 {
2873 struct linger_work *lwork = container_of(w, struct linger_work, work);
2874 struct ceph_osd_linger_request *lreq = lwork->lreq;
2875
2876 if (!linger_registered(lreq)) {
2877 dout("%s lreq %p not registered\n", __func__, lreq);
2878 goto out;
2879 }
2880
2881 WARN_ON(!lreq->is_watch);
2882 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2883 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2884 lwork->notify.payload_len);
2885 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2886 lwork->notify.notifier_id, lwork->notify.payload,
2887 lwork->notify.payload_len);
2888
2889 out:
2890 ceph_msg_put(lwork->notify.msg);
2891 lwork_free(lwork);
2892 }
2893
2894 static void do_watch_error(struct work_struct *w)
2895 {
2896 struct linger_work *lwork = container_of(w, struct linger_work, work);
2897 struct ceph_osd_linger_request *lreq = lwork->lreq;
2898
2899 if (!linger_registered(lreq)) {
2900 dout("%s lreq %p not registered\n", __func__, lreq);
2901 goto out;
2902 }
2903
2904 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2905 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2906
2907 out:
2908 lwork_free(lwork);
2909 }
2910
2911 static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2912 {
2913 struct linger_work *lwork;
2914
2915 lwork = lwork_alloc(lreq, do_watch_error);
2916 if (!lwork) {
2917 pr_err("failed to allocate error-lwork\n");
2918 return;
2919 }
2920
2921 lwork->error.err = lreq->last_error;
2922 lwork_queue(lwork);
2923 }
2924
2925 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2926 int result)
2927 {
2928 if (!completion_done(&lreq->reg_commit_wait)) {
2929 lreq->reg_commit_error = (result <= 0 ? result : 0);
2930 complete_all(&lreq->reg_commit_wait);
2931 }
2932 }
2933
2934 static void linger_commit_cb(struct ceph_osd_request *req)
2935 {
2936 struct ceph_osd_linger_request *lreq = req->r_priv;
2937
2938 mutex_lock(&lreq->lock);
2939 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2940 lreq->linger_id, req->r_result);
2941 linger_reg_commit_complete(lreq, req->r_result);
2942 lreq->committed = true;
2943
2944 if (!lreq->is_watch) {
2945 struct ceph_osd_data *osd_data =
2946 osd_req_op_data(req, 0, notify, response_data);
2947 void *p = page_address(osd_data->pages[0]);
2948
2949 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2950 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2951
2952
2953 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2954 lreq->notify_id = ceph_decode_64(&p);
2955 dout("lreq %p notify_id %llu\n", lreq,
2956 lreq->notify_id);
2957 } else {
2958 dout("lreq %p no notify_id\n", lreq);
2959 }
2960 }
2961
2962 mutex_unlock(&lreq->lock);
2963 linger_put(lreq);
2964 }
2965
2966 static int normalize_watch_error(int err)
2967 {
2968
2969
2970
2971
2972
2973 if (err == -ENOENT)
2974 err = -ENOTCONN;
2975
2976 return err;
2977 }
2978
2979 static void linger_reconnect_cb(struct ceph_osd_request *req)
2980 {
2981 struct ceph_osd_linger_request *lreq = req->r_priv;
2982
2983 mutex_lock(&lreq->lock);
2984 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2985 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2986 if (req->r_result < 0) {
2987 if (!lreq->last_error) {
2988 lreq->last_error = normalize_watch_error(req->r_result);
2989 queue_watch_error(lreq);
2990 }
2991 }
2992
2993 mutex_unlock(&lreq->lock);
2994 linger_put(lreq);
2995 }
2996
2997 static void send_linger(struct ceph_osd_linger_request *lreq)
2998 {
2999 struct ceph_osd_request *req = lreq->reg_req;
3000 struct ceph_osd_req_op *op = &req->r_ops[0];
3001
3002 verify_osdc_wrlocked(req->r_osdc);
3003 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3004
3005 if (req->r_osd)
3006 cancel_linger_request(req);
3007
3008 request_reinit(req);
3009 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
3010 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
3011 req->r_flags = lreq->t.flags;
3012 req->r_mtime = lreq->mtime;
3013
3014 mutex_lock(&lreq->lock);
3015 if (lreq->is_watch && lreq->committed) {
3016 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3017 op->watch.cookie != lreq->linger_id);
3018 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
3019 op->watch.gen = ++lreq->register_gen;
3020 dout("lreq %p reconnect register_gen %u\n", lreq,
3021 op->watch.gen);
3022 req->r_callback = linger_reconnect_cb;
3023 } else {
3024 if (!lreq->is_watch)
3025 lreq->notify_id = 0;
3026 else
3027 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
3028 dout("lreq %p register\n", lreq);
3029 req->r_callback = linger_commit_cb;
3030 }
3031 mutex_unlock(&lreq->lock);
3032
3033 req->r_priv = linger_get(lreq);
3034 req->r_linger = true;
3035
3036 submit_request(req, true);
3037 }
3038
3039 static void linger_ping_cb(struct ceph_osd_request *req)
3040 {
3041 struct ceph_osd_linger_request *lreq = req->r_priv;
3042
3043 mutex_lock(&lreq->lock);
3044 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3045 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3046 lreq->last_error);
3047 if (lreq->register_gen == req->r_ops[0].watch.gen) {
3048 if (!req->r_result) {
3049 lreq->watch_valid_thru = lreq->ping_sent;
3050 } else if (!lreq->last_error) {
3051 lreq->last_error = normalize_watch_error(req->r_result);
3052 queue_watch_error(lreq);
3053 }
3054 } else {
3055 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3056 lreq->register_gen, req->r_ops[0].watch.gen);
3057 }
3058
3059 mutex_unlock(&lreq->lock);
3060 linger_put(lreq);
3061 }
3062
3063 static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3064 {
3065 struct ceph_osd_client *osdc = lreq->osdc;
3066 struct ceph_osd_request *req = lreq->ping_req;
3067 struct ceph_osd_req_op *op = &req->r_ops[0];
3068
3069 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
3070 dout("%s PAUSERD\n", __func__);
3071 return;
3072 }
3073
3074 lreq->ping_sent = jiffies;
3075 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3076 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3077 lreq->register_gen);
3078
3079 if (req->r_osd)
3080 cancel_linger_request(req);
3081
3082 request_reinit(req);
3083 target_copy(&req->r_t, &lreq->t);
3084
3085 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3086 op->watch.cookie != lreq->linger_id ||
3087 op->watch.op != CEPH_OSD_WATCH_OP_PING);
3088 op->watch.gen = lreq->register_gen;
3089 req->r_callback = linger_ping_cb;
3090 req->r_priv = linger_get(lreq);
3091 req->r_linger = true;
3092
3093 ceph_osdc_get_request(req);
3094 account_request(req);
3095 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3096 link_request(lreq->osd, req);
3097 send_request(req);
3098 }
3099
3100 static void linger_submit(struct ceph_osd_linger_request *lreq)
3101 {
3102 struct ceph_osd_client *osdc = lreq->osdc;
3103 struct ceph_osd *osd;
3104
3105 down_write(&osdc->lock);
3106 linger_register(lreq);
3107 if (lreq->is_watch) {
3108 lreq->reg_req->r_ops[0].watch.cookie = lreq->linger_id;
3109 lreq->ping_req->r_ops[0].watch.cookie = lreq->linger_id;
3110 } else {
3111 lreq->reg_req->r_ops[0].notify.cookie = lreq->linger_id;
3112 }
3113
3114 calc_target(osdc, &lreq->t, false);
3115 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3116 link_linger(osd, lreq);
3117
3118 send_linger(lreq);
3119 up_write(&osdc->lock);
3120 }
3121
3122 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3123 {
3124 struct ceph_osd_client *osdc = lreq->osdc;
3125 struct ceph_osd_linger_request *lookup_lreq;
3126
3127 verify_osdc_wrlocked(osdc);
3128
3129 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3130 lreq->linger_id);
3131 if (!lookup_lreq)
3132 return;
3133
3134 WARN_ON(lookup_lreq != lreq);
3135 erase_linger_mc(&osdc->linger_map_checks, lreq);
3136 linger_put(lreq);
3137 }
3138
3139
3140
3141
3142 static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3143 {
3144 if (lreq->is_watch && lreq->ping_req->r_osd)
3145 cancel_linger_request(lreq->ping_req);
3146 if (lreq->reg_req->r_osd)
3147 cancel_linger_request(lreq->reg_req);
3148 cancel_linger_map_check(lreq);
3149 unlink_linger(lreq->osd, lreq);
3150 linger_unregister(lreq);
3151 }
3152
3153 static void linger_cancel(struct ceph_osd_linger_request *lreq)
3154 {
3155 struct ceph_osd_client *osdc = lreq->osdc;
3156
3157 down_write(&osdc->lock);
3158 if (__linger_registered(lreq))
3159 __linger_cancel(lreq);
3160 up_write(&osdc->lock);
3161 }
3162
3163 static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3164
3165 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3166 {
3167 struct ceph_osd_client *osdc = lreq->osdc;
3168 struct ceph_osdmap *map = osdc->osdmap;
3169
3170 verify_osdc_wrlocked(osdc);
3171 WARN_ON(!map->epoch);
3172
3173 if (lreq->register_gen) {
3174 lreq->map_dne_bound = map->epoch;
3175 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3176 lreq, lreq->linger_id);
3177 } else {
3178 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3179 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3180 map->epoch);
3181 }
3182
3183 if (lreq->map_dne_bound) {
3184 if (map->epoch >= lreq->map_dne_bound) {
3185
3186 pr_info("linger_id %llu pool does not exist\n",
3187 lreq->linger_id);
3188 linger_reg_commit_complete(lreq, -ENOENT);
3189 __linger_cancel(lreq);
3190 }
3191 } else {
3192 send_linger_map_check(lreq);
3193 }
3194 }
3195
3196 static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3197 {
3198 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3199 struct ceph_osd_linger_request *lreq;
3200 u64 linger_id = greq->private_data;
3201
3202 WARN_ON(greq->result || !greq->u.newest);
3203
3204 down_write(&osdc->lock);
3205 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3206 if (!lreq) {
3207 dout("%s linger_id %llu dne\n", __func__, linger_id);
3208 goto out_unlock;
3209 }
3210
3211 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3212 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3213 greq->u.newest);
3214 if (!lreq->map_dne_bound)
3215 lreq->map_dne_bound = greq->u.newest;
3216 erase_linger_mc(&osdc->linger_map_checks, lreq);
3217 check_linger_pool_dne(lreq);
3218
3219 linger_put(lreq);
3220 out_unlock:
3221 up_write(&osdc->lock);
3222 }
3223
3224 static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3225 {
3226 struct ceph_osd_client *osdc = lreq->osdc;
3227 struct ceph_osd_linger_request *lookup_lreq;
3228 int ret;
3229
3230 verify_osdc_wrlocked(osdc);
3231
3232 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3233 lreq->linger_id);
3234 if (lookup_lreq) {
3235 WARN_ON(lookup_lreq != lreq);
3236 return;
3237 }
3238
3239 linger_get(lreq);
3240 insert_linger_mc(&osdc->linger_map_checks, lreq);
3241 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3242 linger_map_check_cb, lreq->linger_id);
3243 WARN_ON(ret);
3244 }
3245
3246 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3247 {
3248 int ret;
3249
3250 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3251 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3252 return ret ?: lreq->reg_commit_error;
3253 }
3254
3255 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3256 {
3257 int ret;
3258
3259 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3260 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3261 return ret ?: lreq->notify_finish_error;
3262 }
3263
3264
3265
3266
3267
3268
3269
3270 static void handle_timeout(struct work_struct *work)
3271 {
3272 struct ceph_osd_client *osdc =
3273 container_of(work, struct ceph_osd_client, timeout_work.work);
3274 struct ceph_options *opts = osdc->client->options;
3275 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3276 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3277 LIST_HEAD(slow_osds);
3278 struct rb_node *n, *p;
3279
3280 dout("%s osdc %p\n", __func__, osdc);
3281 down_write(&osdc->lock);
3282
3283
3284
3285
3286
3287
3288 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3289 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3290 bool found = false;
3291
3292 for (p = rb_first(&osd->o_requests); p; ) {
3293 struct ceph_osd_request *req =
3294 rb_entry(p, struct ceph_osd_request, r_node);
3295
3296 p = rb_next(p);
3297
3298 if (time_before(req->r_stamp, cutoff)) {
3299 dout(" req %p tid %llu on osd%d is laggy\n",
3300 req, req->r_tid, osd->o_osd);
3301 found = true;
3302 }
3303 if (opts->osd_request_timeout &&
3304 time_before(req->r_start_stamp, expiry_cutoff)) {
3305 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3306 req->r_tid, osd->o_osd);
3307 abort_request(req, -ETIMEDOUT);
3308 }
3309 }
3310 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3311 struct ceph_osd_linger_request *lreq =
3312 rb_entry(p, struct ceph_osd_linger_request, node);
3313
3314 dout(" lreq %p linger_id %llu is served by osd%d\n",
3315 lreq, lreq->linger_id, osd->o_osd);
3316 found = true;
3317
3318 mutex_lock(&lreq->lock);
3319 if (lreq->is_watch && lreq->committed && !lreq->last_error)
3320 send_linger_ping(lreq);
3321 mutex_unlock(&lreq->lock);
3322 }
3323
3324 if (found)
3325 list_move_tail(&osd->o_keepalive_item, &slow_osds);
3326 }
3327
3328 if (opts->osd_request_timeout) {
3329 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3330 struct ceph_osd_request *req =
3331 rb_entry(p, struct ceph_osd_request, r_node);
3332
3333 p = rb_next(p);
3334
3335 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3336 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3337 req->r_tid, osdc->homeless_osd.o_osd);
3338 abort_request(req, -ETIMEDOUT);
3339 }
3340 }
3341 }
3342
3343 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3344 maybe_request_map(osdc);
3345
3346 while (!list_empty(&slow_osds)) {
3347 struct ceph_osd *osd = list_first_entry(&slow_osds,
3348 struct ceph_osd,
3349 o_keepalive_item);
3350 list_del_init(&osd->o_keepalive_item);
3351 ceph_con_keepalive(&osd->o_con);
3352 }
3353
3354 up_write(&osdc->lock);
3355 schedule_delayed_work(&osdc->timeout_work,
3356 osdc->client->options->osd_keepalive_timeout);
3357 }
3358
3359 static void handle_osds_timeout(struct work_struct *work)
3360 {
3361 struct ceph_osd_client *osdc =
3362 container_of(work, struct ceph_osd_client,
3363 osds_timeout_work.work);
3364 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3365 struct ceph_osd *osd, *nosd;
3366
3367 dout("%s osdc %p\n", __func__, osdc);
3368 down_write(&osdc->lock);
3369 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3370 if (time_before(jiffies, osd->lru_ttl))
3371 break;
3372
3373 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3374 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3375 close_osd(osd);
3376 }
3377
3378 up_write(&osdc->lock);
3379 schedule_delayed_work(&osdc->osds_timeout_work,
3380 round_jiffies_relative(delay));
3381 }
3382
3383 static int ceph_oloc_decode(void **p, void *end,
3384 struct ceph_object_locator *oloc)
3385 {
3386 u8 struct_v, struct_cv;
3387 u32 len;
3388 void *struct_end;
3389 int ret = 0;
3390
3391 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3392 struct_v = ceph_decode_8(p);
3393 struct_cv = ceph_decode_8(p);
3394 if (struct_v < 3) {
3395 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3396 struct_v, struct_cv);
3397 goto e_inval;
3398 }
3399 if (struct_cv > 6) {
3400 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3401 struct_v, struct_cv);
3402 goto e_inval;
3403 }
3404 len = ceph_decode_32(p);
3405 ceph_decode_need(p, end, len, e_inval);
3406 struct_end = *p + len;
3407
3408 oloc->pool = ceph_decode_64(p);
3409 *p += 4;
3410
3411 len = ceph_decode_32(p);
3412 if (len > 0) {
3413 pr_warn("ceph_object_locator::key is set\n");
3414 goto e_inval;
3415 }
3416
3417 if (struct_v >= 5) {
3418 bool changed = false;
3419
3420 len = ceph_decode_32(p);
3421 if (len > 0) {
3422 ceph_decode_need(p, end, len, e_inval);
3423 if (!oloc->pool_ns ||
3424 ceph_compare_string(oloc->pool_ns, *p, len))
3425 changed = true;
3426 *p += len;
3427 } else {
3428 if (oloc->pool_ns)
3429 changed = true;
3430 }
3431 if (changed) {
3432
3433 pr_warn("ceph_object_locator::nspace is changed\n");
3434 goto e_inval;
3435 }
3436 }
3437
3438 if (struct_v >= 6) {
3439 s64 hash = ceph_decode_64(p);
3440 if (hash != -1) {
3441 pr_warn("ceph_object_locator::hash is set\n");
3442 goto e_inval;
3443 }
3444 }
3445
3446
3447 *p = struct_end;
3448 out:
3449 return ret;
3450
3451 e_inval:
3452 ret = -EINVAL;
3453 goto out;
3454 }
3455
3456 static int ceph_redirect_decode(void **p, void *end,
3457 struct ceph_request_redirect *redir)
3458 {
3459 u8 struct_v, struct_cv;
3460 u32 len;
3461 void *struct_end;
3462 int ret;
3463
3464 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3465 struct_v = ceph_decode_8(p);
3466 struct_cv = ceph_decode_8(p);
3467 if (struct_cv > 1) {
3468 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3469 struct_v, struct_cv);
3470 goto e_inval;
3471 }
3472 len = ceph_decode_32(p);
3473 ceph_decode_need(p, end, len, e_inval);
3474 struct_end = *p + len;
3475
3476 ret = ceph_oloc_decode(p, end, &redir->oloc);
3477 if (ret)
3478 goto out;
3479
3480 len = ceph_decode_32(p);
3481 if (len > 0) {
3482 pr_warn("ceph_request_redirect::object_name is set\n");
3483 goto e_inval;
3484 }
3485
3486 len = ceph_decode_32(p);
3487 *p += len;
3488
3489
3490 *p = struct_end;
3491 out:
3492 return ret;
3493
3494 e_inval:
3495 ret = -EINVAL;
3496 goto out;
3497 }
3498
3499 struct MOSDOpReply {
3500 struct ceph_pg pgid;
3501 u64 flags;
3502 int result;
3503 u32 epoch;
3504 int num_ops;
3505 u32 outdata_len[CEPH_OSD_MAX_OPS];
3506 s32 rval[CEPH_OSD_MAX_OPS];
3507 int retry_attempt;
3508 struct ceph_eversion replay_version;
3509 u64 user_version;
3510 struct ceph_request_redirect redirect;
3511 };
3512
3513 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
3514 {
3515 void *p = msg->front.iov_base;
3516 void *const end = p + msg->front.iov_len;
3517 u16 version = le16_to_cpu(msg->hdr.version);
3518 struct ceph_eversion bad_replay_version;
3519 u8 decode_redir;
3520 u32 len;
3521 int ret;
3522 int i;
3523
3524 ceph_decode_32_safe(&p, end, len, e_inval);
3525 ceph_decode_need(&p, end, len, e_inval);
3526 p += len;
3527
3528 ret = ceph_decode_pgid(&p, end, &m->pgid);
3529 if (ret)
3530 return ret;
3531
3532 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3533 ceph_decode_32_safe(&p, end, m->result, e_inval);
3534 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3535 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3536 p += sizeof(bad_replay_version);
3537 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
3538
3539 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3540 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3541 goto e_inval;
3542
3543 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3544 e_inval);
3545 for (i = 0; i < m->num_ops; i++) {
3546 struct ceph_osd_op *op = p;
3547
3548 m->outdata_len[i] = le32_to_cpu(op->payload_len);
3549 p += sizeof(*op);
3550 }
3551
3552 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3553 for (i = 0; i < m->num_ops; i++)
3554 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
3555
3556 if (version >= 5) {
3557 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3558 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3559 p += sizeof(m->replay_version);
3560 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3561 } else {
3562 m->replay_version = bad_replay_version;
3563 m->user_version = le64_to_cpu(m->replay_version.version);
3564 }
3565
3566 if (version >= 6) {
3567 if (version >= 7)
3568 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
3569 else
3570 decode_redir = 1;
3571 } else {
3572 decode_redir = 0;
3573 }
3574
3575 if (decode_redir) {
3576 ret = ceph_redirect_decode(&p, end, &m->redirect);
3577 if (ret)
3578 return ret;
3579 } else {
3580 ceph_oloc_init(&m->redirect.oloc);
3581 }
3582
3583 return 0;
3584
3585 e_inval:
3586 return -EINVAL;
3587 }
3588
3589
3590
3591
3592
3593 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3594 {
3595 struct ceph_osd_client *osdc = osd->o_osdc;
3596 struct ceph_osd_request *req;
3597 struct MOSDOpReply m;
3598 u64 tid = le64_to_cpu(msg->hdr.tid);
3599 u32 data_len = 0;
3600 int ret;
3601 int i;
3602
3603 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3604
3605 down_read(&osdc->lock);
3606 if (!osd_registered(osd)) {
3607 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3608 goto out_unlock_osdc;
3609 }
3610 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3611
3612 mutex_lock(&osd->lock);
3613 req = lookup_request(&osd->o_requests, tid);
3614 if (!req) {
3615 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3616 goto out_unlock_session;
3617 }
3618
3619 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3620 ret = decode_MOSDOpReply(msg, &m);
3621 m.redirect.oloc.pool_ns = NULL;
3622 if (ret) {
3623 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3624 req->r_tid, ret);
3625 ceph_msg_dump(msg);
3626 goto fail_request;
3627 }
3628 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3629 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3630 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3631 le64_to_cpu(m.replay_version.version), m.user_version);
3632
3633 if (m.retry_attempt >= 0) {
3634 if (m.retry_attempt != req->r_attempts - 1) {
3635 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3636 req, req->r_tid, m.retry_attempt,
3637 req->r_attempts - 1);
3638 goto out_unlock_session;
3639 }
3640 } else {
3641 WARN_ON(1);
3642 }
3643
3644 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3645 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3646 m.redirect.oloc.pool);
3647 unlink_request(osd, req);
3648 mutex_unlock(&osd->lock);
3649
3650
3651
3652
3653
3654 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3655 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED |
3656 CEPH_OSD_FLAG_IGNORE_OVERLAY |
3657 CEPH_OSD_FLAG_IGNORE_CACHE;
3658 req->r_tid = 0;
3659 __submit_request(req, false);
3660 goto out_unlock_osdc;
3661 }
3662
3663 if (m.num_ops != req->r_num_ops) {
3664 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3665 req->r_num_ops, req->r_tid);
3666 goto fail_request;
3667 }
3668 for (i = 0; i < req->r_num_ops; i++) {
3669 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3670 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3671 req->r_ops[i].rval = m.rval[i];
3672 req->r_ops[i].outdata_len = m.outdata_len[i];
3673 data_len += m.outdata_len[i];
3674 }
3675 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3676 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3677 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3678 goto fail_request;
3679 }
3680 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3681 req, req->r_tid, m.result, data_len);
3682
3683
3684
3685
3686
3687 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3688 req->r_result = m.result ?: data_len;
3689 finish_request(req);
3690 mutex_unlock(&osd->lock);
3691 up_read(&osdc->lock);
3692
3693 __complete_request(req);
3694 return;
3695
3696 fail_request:
3697 complete_request(req, -EIO);
3698 out_unlock_session:
3699 mutex_unlock(&osd->lock);
3700 out_unlock_osdc:
3701 up_read(&osdc->lock);
3702 }
3703
3704 static void set_pool_was_full(struct ceph_osd_client *osdc)
3705 {
3706 struct rb_node *n;
3707
3708 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3709 struct ceph_pg_pool_info *pi =
3710 rb_entry(n, struct ceph_pg_pool_info, node);
3711
3712 pi->was_full = __pool_full(pi);
3713 }
3714 }
3715
3716 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
3717 {
3718 struct ceph_pg_pool_info *pi;
3719
3720 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3721 if (!pi)
3722 return false;
3723
3724 return pi->was_full && !__pool_full(pi);
3725 }
3726
3727 static enum calc_target_result
3728 recalc_linger_target(struct ceph_osd_linger_request *lreq)
3729 {
3730 struct ceph_osd_client *osdc = lreq->osdc;
3731 enum calc_target_result ct_res;
3732
3733 ct_res = calc_target(osdc, &lreq->t, true);
3734 if (ct_res == CALC_TARGET_NEED_RESEND) {
3735 struct ceph_osd *osd;
3736
3737 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3738 if (osd != lreq->osd) {
3739 unlink_linger(lreq->osd, lreq);
3740 link_linger(osd, lreq);
3741 }
3742 }
3743
3744 return ct_res;
3745 }
3746
3747
3748
3749
3750 static void scan_requests(struct ceph_osd *osd,
3751 bool force_resend,
3752 bool cleared_full,
3753 bool check_pool_cleared_full,
3754 struct rb_root *need_resend,
3755 struct list_head *need_resend_linger)
3756 {
3757 struct ceph_osd_client *osdc = osd->o_osdc;
3758 struct rb_node *n;
3759 bool force_resend_writes;
3760
3761 for (n = rb_first(&osd->o_linger_requests); n; ) {
3762 struct ceph_osd_linger_request *lreq =
3763 rb_entry(n, struct ceph_osd_linger_request, node);
3764 enum calc_target_result ct_res;
3765
3766 n = rb_next(n);
3767
3768 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3769 lreq->linger_id);
3770 ct_res = recalc_linger_target(lreq);
3771 switch (ct_res) {
3772 case CALC_TARGET_NO_ACTION:
3773 force_resend_writes = cleared_full ||
3774 (check_pool_cleared_full &&
3775 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3776 if (!force_resend && !force_resend_writes)
3777 break;
3778
3779
3780 case CALC_TARGET_NEED_RESEND:
3781 cancel_linger_map_check(lreq);
3782
3783
3784
3785
3786
3787 if (list_empty(&lreq->scan_item))
3788 list_add_tail(&lreq->scan_item, need_resend_linger);
3789 break;
3790 case CALC_TARGET_POOL_DNE:
3791 list_del_init(&lreq->scan_item);
3792 check_linger_pool_dne(lreq);
3793 break;
3794 }
3795 }
3796
3797 for (n = rb_first(&osd->o_requests); n; ) {
3798 struct ceph_osd_request *req =
3799 rb_entry(n, struct ceph_osd_request, r_node);
3800 enum calc_target_result ct_res;
3801
3802 n = rb_next(n);
3803
3804 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3805 ct_res = calc_target(osdc, &req->r_t, false);
3806 switch (ct_res) {
3807 case CALC_TARGET_NO_ACTION:
3808 force_resend_writes = cleared_full ||
3809 (check_pool_cleared_full &&
3810 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3811 if (!force_resend &&
3812 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3813 !force_resend_writes))
3814 break;
3815
3816
3817 case CALC_TARGET_NEED_RESEND:
3818 cancel_map_check(req);
3819 unlink_request(osd, req);
3820 insert_request(need_resend, req);
3821 break;
3822 case CALC_TARGET_POOL_DNE:
3823 check_pool_dne(req);
3824 break;
3825 }
3826 }
3827 }
3828
3829 static int handle_one_map(struct ceph_osd_client *osdc,
3830 void *p, void *end, bool incremental,
3831 struct rb_root *need_resend,
3832 struct list_head *need_resend_linger)
3833 {
3834 struct ceph_osdmap *newmap;
3835 struct rb_node *n;
3836 bool skipped_map = false;
3837 bool was_full;
3838
3839 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3840 set_pool_was_full(osdc);
3841
3842 if (incremental)
3843 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3844 else
3845 newmap = ceph_osdmap_decode(&p, end);
3846 if (IS_ERR(newmap))
3847 return PTR_ERR(newmap);
3848
3849 if (newmap != osdc->osdmap) {
3850
3851
3852
3853
3854
3855 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3856 struct ceph_pg_pool_info *pi =
3857 rb_entry(n, struct ceph_pg_pool_info, node);
3858 struct ceph_pg_pool_info *old_pi;
3859
3860 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3861 if (old_pi)
3862 pi->was_full = old_pi->was_full;
3863 else
3864 WARN_ON(pi->was_full);
3865 }
3866
3867 if (osdc->osdmap->epoch &&
3868 osdc->osdmap->epoch + 1 < newmap->epoch) {
3869 WARN_ON(incremental);
3870 skipped_map = true;
3871 }
3872
3873 ceph_osdmap_destroy(osdc->osdmap);
3874 osdc->osdmap = newmap;
3875 }
3876
3877 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3878 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3879 need_resend, need_resend_linger);
3880
3881 for (n = rb_first(&osdc->osds); n; ) {
3882 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3883
3884 n = rb_next(n);
3885
3886 scan_requests(osd, skipped_map, was_full, true, need_resend,
3887 need_resend_linger);
3888 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3889 memcmp(&osd->o_con.peer_addr,
3890 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3891 sizeof(struct ceph_entity_addr)))
3892 close_osd(osd);
3893 }
3894
3895 return 0;
3896 }
3897
3898 static void kick_requests(struct ceph_osd_client *osdc,
3899 struct rb_root *need_resend,
3900 struct list_head *need_resend_linger)
3901 {
3902 struct ceph_osd_linger_request *lreq, *nlreq;
3903 enum calc_target_result ct_res;
3904 struct rb_node *n;
3905
3906
3907 for (n = rb_first(need_resend); n; ) {
3908 struct ceph_osd_request *req =
3909 rb_entry(n, struct ceph_osd_request, r_node);
3910
3911 n = rb_next(n);
3912
3913 if (req->r_t.epoch < osdc->osdmap->epoch) {
3914 ct_res = calc_target(osdc, &req->r_t, false);
3915 if (ct_res == CALC_TARGET_POOL_DNE) {
3916 erase_request(need_resend, req);
3917 check_pool_dne(req);
3918 }
3919 }
3920 }
3921
3922 for (n = rb_first(need_resend); n; ) {
3923 struct ceph_osd_request *req =
3924 rb_entry(n, struct ceph_osd_request, r_node);
3925 struct ceph_osd *osd;
3926
3927 n = rb_next(n);
3928 erase_request(need_resend, req);
3929
3930 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3931 link_request(osd, req);
3932 if (!req->r_linger) {
3933 if (!osd_homeless(osd) && !req->r_t.paused)
3934 send_request(req);
3935 } else {
3936 cancel_linger_request(req);
3937 }
3938 }
3939
3940 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3941 if (!osd_homeless(lreq->osd))
3942 send_linger(lreq);
3943
3944 list_del_init(&lreq->scan_item);
3945 }
3946 }
3947
3948
3949
3950
3951
3952
3953
3954
3955 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3956 {
3957 void *p = msg->front.iov_base;
3958 void *const end = p + msg->front.iov_len;
3959 u32 nr_maps, maplen;
3960 u32 epoch;
3961 struct ceph_fsid fsid;
3962 struct rb_root need_resend = RB_ROOT;
3963 LIST_HEAD(need_resend_linger);
3964 bool handled_incremental = false;
3965 bool was_pauserd, was_pausewr;
3966 bool pauserd, pausewr;
3967 int err;
3968
3969 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
3970 down_write(&osdc->lock);
3971
3972
3973 ceph_decode_need(&p, end, sizeof(fsid), bad);
3974 ceph_decode_copy(&p, &fsid, sizeof(fsid));
3975 if (ceph_check_fsid(osdc->client, &fsid) < 0)
3976 goto bad;
3977
3978 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3979 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3980 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
3981 have_pool_full(osdc);
3982
3983
3984 ceph_decode_32_safe(&p, end, nr_maps, bad);
3985 dout(" %d inc maps\n", nr_maps);
3986 while (nr_maps > 0) {
3987 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3988 epoch = ceph_decode_32(&p);
3989 maplen = ceph_decode_32(&p);
3990 ceph_decode_need(&p, end, maplen, bad);
3991 if (osdc->osdmap->epoch &&
3992 osdc->osdmap->epoch + 1 == epoch) {
3993 dout("applying incremental map %u len %d\n",
3994 epoch, maplen);
3995 err = handle_one_map(osdc, p, p + maplen, true,
3996 &need_resend, &need_resend_linger);
3997 if (err)
3998 goto bad;
3999 handled_incremental = true;
4000 } else {
4001 dout("ignoring incremental map %u len %d\n",
4002 epoch, maplen);
4003 }
4004 p += maplen;
4005 nr_maps--;
4006 }
4007 if (handled_incremental)
4008 goto done;
4009
4010
4011 ceph_decode_32_safe(&p, end, nr_maps, bad);
4012 dout(" %d full maps\n", nr_maps);
4013 while (nr_maps) {
4014 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4015 epoch = ceph_decode_32(&p);
4016 maplen = ceph_decode_32(&p);
4017 ceph_decode_need(&p, end, maplen, bad);
4018 if (nr_maps > 1) {
4019 dout("skipping non-latest full map %u len %d\n",
4020 epoch, maplen);
4021 } else if (osdc->osdmap->epoch >= epoch) {
4022 dout("skipping full map %u len %d, "
4023 "older than our %u\n", epoch, maplen,
4024 osdc->osdmap->epoch);
4025 } else {
4026 dout("taking full map %u len %d\n", epoch, maplen);
4027 err = handle_one_map(osdc, p, p + maplen, false,
4028 &need_resend, &need_resend_linger);
4029 if (err)
4030 goto bad;
4031 }
4032 p += maplen;
4033 nr_maps--;
4034 }
4035
4036 done:
4037
4038
4039
4040
4041
4042 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4043 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4044 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4045 have_pool_full(osdc);
4046 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4047 osdc->osdmap->epoch < osdc->epoch_barrier)
4048 maybe_request_map(osdc);
4049
4050 kick_requests(osdc, &need_resend, &need_resend_linger);
4051
4052 ceph_osdc_abort_on_full(osdc);
4053 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4054 osdc->osdmap->epoch);
4055 up_write(&osdc->lock);
4056 wake_up_all(&osdc->client->auth_wq);
4057 return;
4058
4059 bad:
4060 pr_err("osdc handle_map corrupt msg\n");
4061 ceph_msg_dump(msg);
4062 up_write(&osdc->lock);
4063 }
4064
4065
4066
4067
4068 static void kick_osd_requests(struct ceph_osd *osd)
4069 {
4070 struct rb_node *n;
4071
4072 clear_backoffs(osd);
4073
4074 for (n = rb_first(&osd->o_requests); n; ) {
4075 struct ceph_osd_request *req =
4076 rb_entry(n, struct ceph_osd_request, r_node);
4077
4078 n = rb_next(n);
4079
4080 if (!req->r_linger) {
4081 if (!req->r_t.paused)
4082 send_request(req);
4083 } else {
4084 cancel_linger_request(req);
4085 }
4086 }
4087 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4088 struct ceph_osd_linger_request *lreq =
4089 rb_entry(n, struct ceph_osd_linger_request, node);
4090
4091 send_linger(lreq);
4092 }
4093 }
4094
4095
4096
4097
4098 static void osd_fault(struct ceph_connection *con)
4099 {
4100 struct ceph_osd *osd = con->private;
4101 struct ceph_osd_client *osdc = osd->o_osdc;
4102
4103 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4104
4105 down_write(&osdc->lock);
4106 if (!osd_registered(osd)) {
4107 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4108 goto out_unlock;
4109 }
4110
4111 if (!reopen_osd(osd))
4112 kick_osd_requests(osd);
4113 maybe_request_map(osdc);
4114
4115 out_unlock:
4116 up_write(&osdc->lock);
4117 }
4118
4119 struct MOSDBackoff {
4120 struct ceph_spg spgid;
4121 u32 map_epoch;
4122 u8 op;
4123 u64 id;
4124 struct ceph_hobject_id *begin;
4125 struct ceph_hobject_id *end;
4126 };
4127
4128 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4129 {
4130 void *p = msg->front.iov_base;
4131 void *const end = p + msg->front.iov_len;
4132 u8 struct_v;
4133 u32 struct_len;
4134 int ret;
4135
4136 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4137 if (ret)
4138 return ret;
4139
4140 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4141 if (ret)
4142 return ret;
4143
4144 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4145 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4146 ceph_decode_8_safe(&p, end, m->op, e_inval);
4147 ceph_decode_64_safe(&p, end, m->id, e_inval);
4148
4149 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4150 if (!m->begin)
4151 return -ENOMEM;
4152
4153 ret = decode_hoid(&p, end, m->begin);
4154 if (ret) {
4155 free_hoid(m->begin);
4156 return ret;
4157 }
4158
4159 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4160 if (!m->end) {
4161 free_hoid(m->begin);
4162 return -ENOMEM;
4163 }
4164
4165 ret = decode_hoid(&p, end, m->end);
4166 if (ret) {
4167 free_hoid(m->begin);
4168 free_hoid(m->end);
4169 return ret;
4170 }
4171
4172 return 0;
4173
4174 e_inval:
4175 return -EINVAL;
4176 }
4177
4178 static struct ceph_msg *create_backoff_message(
4179 const struct ceph_osd_backoff *backoff,
4180 u32 map_epoch)
4181 {
4182 struct ceph_msg *msg;
4183 void *p, *end;
4184 int msg_size;
4185
4186 msg_size = CEPH_ENCODING_START_BLK_LEN +
4187 CEPH_PGID_ENCODING_LEN + 1;
4188 msg_size += 4 + 1 + 8;
4189 msg_size += CEPH_ENCODING_START_BLK_LEN +
4190 hoid_encoding_size(backoff->begin);
4191 msg_size += CEPH_ENCODING_START_BLK_LEN +
4192 hoid_encoding_size(backoff->end);
4193
4194 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4195 if (!msg)
4196 return NULL;
4197
4198 p = msg->front.iov_base;
4199 end = p + msg->front_alloc_len;
4200
4201 encode_spgid(&p, &backoff->spgid);
4202 ceph_encode_32(&p, map_epoch);
4203 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4204 ceph_encode_64(&p, backoff->id);
4205 encode_hoid(&p, end, backoff->begin);
4206 encode_hoid(&p, end, backoff->end);
4207 BUG_ON(p != end);
4208
4209 msg->front.iov_len = p - msg->front.iov_base;
4210 msg->hdr.version = cpu_to_le16(1);
4211 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4212
4213 return msg;
4214 }
4215
4216 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4217 {
4218 struct ceph_spg_mapping *spg;
4219 struct ceph_osd_backoff *backoff;
4220 struct ceph_msg *msg;
4221
4222 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4223 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4224
4225 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4226 if (!spg) {
4227 spg = alloc_spg_mapping();
4228 if (!spg) {
4229 pr_err("%s failed to allocate spg\n", __func__);
4230 return;
4231 }
4232 spg->spgid = m->spgid;
4233 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4234 }
4235
4236 backoff = alloc_backoff();
4237 if (!backoff) {
4238 pr_err("%s failed to allocate backoff\n", __func__);
4239 return;
4240 }
4241 backoff->spgid = m->spgid;
4242 backoff->id = m->id;
4243 backoff->begin = m->begin;
4244 m->begin = NULL;
4245 backoff->end = m->end;
4246 m->end = NULL;
4247
4248 insert_backoff(&spg->backoffs, backoff);
4249 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4250
4251
4252
4253
4254
4255 msg = create_backoff_message(backoff, m->map_epoch);
4256 if (!msg) {
4257 pr_err("%s failed to allocate msg\n", __func__);
4258 return;
4259 }
4260 ceph_con_send(&osd->o_con, msg);
4261 }
4262
4263 static bool target_contained_by(const struct ceph_osd_request_target *t,
4264 const struct ceph_hobject_id *begin,
4265 const struct ceph_hobject_id *end)
4266 {
4267 struct ceph_hobject_id hoid;
4268 int cmp;
4269
4270 hoid_fill_from_target(&hoid, t);
4271 cmp = hoid_compare(&hoid, begin);
4272 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4273 }
4274
4275 static void handle_backoff_unblock(struct ceph_osd *osd,
4276 const struct MOSDBackoff *m)
4277 {
4278 struct ceph_spg_mapping *spg;
4279 struct ceph_osd_backoff *backoff;
4280 struct rb_node *n;
4281
4282 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4283 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4284
4285 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4286 if (!backoff) {
4287 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4288 __func__, osd->o_osd, m->spgid.pgid.pool,
4289 m->spgid.pgid.seed, m->spgid.shard, m->id);
4290 return;
4291 }
4292
4293 if (hoid_compare(backoff->begin, m->begin) &&
4294 hoid_compare(backoff->end, m->end)) {
4295 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4296 __func__, osd->o_osd, m->spgid.pgid.pool,
4297 m->spgid.pgid.seed, m->spgid.shard, m->id);
4298
4299 }
4300
4301 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4302 BUG_ON(!spg);
4303
4304 erase_backoff(&spg->backoffs, backoff);
4305 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4306 free_backoff(backoff);
4307
4308 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4309 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4310 free_spg_mapping(spg);
4311 }
4312
4313 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4314 struct ceph_osd_request *req =
4315 rb_entry(n, struct ceph_osd_request, r_node);
4316
4317 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4318
4319
4320
4321
4322 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4323
4324
4325
4326
4327 send_request(req);
4328 }
4329 }
4330 }
4331 }
4332
4333 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4334 {
4335 struct ceph_osd_client *osdc = osd->o_osdc;
4336 struct MOSDBackoff m;
4337 int ret;
4338
4339 down_read(&osdc->lock);
4340 if (!osd_registered(osd)) {
4341 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4342 up_read(&osdc->lock);
4343 return;
4344 }
4345 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4346
4347 mutex_lock(&osd->lock);
4348 ret = decode_MOSDBackoff(msg, &m);
4349 if (ret) {
4350 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4351 ceph_msg_dump(msg);
4352 goto out_unlock;
4353 }
4354
4355 switch (m.op) {
4356 case CEPH_OSD_BACKOFF_OP_BLOCK:
4357 handle_backoff_block(osd, &m);
4358 break;
4359 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4360 handle_backoff_unblock(osd, &m);
4361 break;
4362 default:
4363 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4364 }
4365
4366 free_hoid(m.begin);
4367 free_hoid(m.end);
4368
4369 out_unlock:
4370 mutex_unlock(&osd->lock);
4371 up_read(&osdc->lock);
4372 }
4373
4374
4375
4376
4377 static void handle_watch_notify(struct ceph_osd_client *osdc,
4378 struct ceph_msg *msg)
4379 {
4380 void *p = msg->front.iov_base;
4381 void *const end = p + msg->front.iov_len;
4382 struct ceph_osd_linger_request *lreq;
4383 struct linger_work *lwork;
4384 u8 proto_ver, opcode;
4385 u64 cookie, notify_id;
4386 u64 notifier_id = 0;
4387 s32 return_code = 0;
4388 void *payload = NULL;
4389 u32 payload_len = 0;
4390
4391 ceph_decode_8_safe(&p, end, proto_ver, bad);
4392 ceph_decode_8_safe(&p, end, opcode, bad);
4393 ceph_decode_64_safe(&p, end, cookie, bad);
4394 p += 8;
4395 ceph_decode_64_safe(&p, end, notify_id, bad);
4396
4397 if (proto_ver >= 1) {
4398 ceph_decode_32_safe(&p, end, payload_len, bad);
4399 ceph_decode_need(&p, end, payload_len, bad);
4400 payload = p;
4401 p += payload_len;
4402 }
4403
4404 if (le16_to_cpu(msg->hdr.version) >= 2)
4405 ceph_decode_32_safe(&p, end, return_code, bad);
4406
4407 if (le16_to_cpu(msg->hdr.version) >= 3)
4408 ceph_decode_64_safe(&p, end, notifier_id, bad);
4409
4410 down_read(&osdc->lock);
4411 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4412 if (!lreq) {
4413 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4414 cookie);
4415 goto out_unlock_osdc;
4416 }
4417
4418 mutex_lock(&lreq->lock);
4419 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4420 opcode, cookie, lreq, lreq->is_watch);
4421 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4422 if (!lreq->last_error) {
4423 lreq->last_error = -ENOTCONN;
4424 queue_watch_error(lreq);
4425 }
4426 } else if (!lreq->is_watch) {
4427
4428 if (lreq->notify_id && lreq->notify_id != notify_id) {
4429 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4430 lreq->notify_id, notify_id);
4431 } else if (!completion_done(&lreq->notify_finish_wait)) {
4432 struct ceph_msg_data *data =
4433 msg->num_data_items ? &msg->data[0] : NULL;
4434
4435 if (data) {
4436 if (lreq->preply_pages) {
4437 WARN_ON(data->type !=
4438 CEPH_MSG_DATA_PAGES);
4439 *lreq->preply_pages = data->pages;
4440 *lreq->preply_len = data->length;
4441 data->own_pages = false;
4442 }
4443 }
4444 lreq->notify_finish_error = return_code;
4445 complete_all(&lreq->notify_finish_wait);
4446 }
4447 } else {
4448
4449 lwork = lwork_alloc(lreq, do_watch_notify);
4450 if (!lwork) {
4451 pr_err("failed to allocate notify-lwork\n");
4452 goto out_unlock_lreq;
4453 }
4454
4455 lwork->notify.notify_id = notify_id;
4456 lwork->notify.notifier_id = notifier_id;
4457 lwork->notify.payload = payload;
4458 lwork->notify.payload_len = payload_len;
4459 lwork->notify.msg = ceph_msg_get(msg);
4460 lwork_queue(lwork);
4461 }
4462
4463 out_unlock_lreq:
4464 mutex_unlock(&lreq->lock);
4465 out_unlock_osdc:
4466 up_read(&osdc->lock);
4467 return;
4468
4469 bad:
4470 pr_err("osdc handle_watch_notify corrupt msg\n");
4471 }
4472
4473
4474
4475
4476 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4477 struct ceph_osd_request *req,
4478 bool nofail)
4479 {
4480 down_read(&osdc->lock);
4481 submit_request(req, false);
4482 up_read(&osdc->lock);
4483
4484 return 0;
4485 }
4486 EXPORT_SYMBOL(ceph_osdc_start_request);
4487
4488
4489
4490
4491
4492 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4493 {
4494 struct ceph_osd_client *osdc = req->r_osdc;
4495
4496 down_write(&osdc->lock);
4497 if (req->r_osd)
4498 cancel_request(req);
4499 up_write(&osdc->lock);
4500 }
4501 EXPORT_SYMBOL(ceph_osdc_cancel_request);
4502
4503
4504
4505
4506 static int wait_request_timeout(struct ceph_osd_request *req,
4507 unsigned long timeout)
4508 {
4509 long left;
4510
4511 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4512 left = wait_for_completion_killable_timeout(&req->r_completion,
4513 ceph_timeout_jiffies(timeout));
4514 if (left <= 0) {
4515 left = left ?: -ETIMEDOUT;
4516 ceph_osdc_cancel_request(req);
4517 } else {
4518 left = req->r_result;
4519 }
4520
4521 return left;
4522 }
4523
4524
4525
4526
4527 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4528 struct ceph_osd_request *req)
4529 {
4530 return wait_request_timeout(req, 0);
4531 }
4532 EXPORT_SYMBOL(ceph_osdc_wait_request);
4533
4534
4535
4536
4537 void ceph_osdc_sync(struct ceph_osd_client *osdc)
4538 {
4539 struct rb_node *n, *p;
4540 u64 last_tid = atomic64_read(&osdc->last_tid);
4541
4542 again:
4543 down_read(&osdc->lock);
4544 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4545 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4546
4547 mutex_lock(&osd->lock);
4548 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4549 struct ceph_osd_request *req =
4550 rb_entry(p, struct ceph_osd_request, r_node);
4551
4552 if (req->r_tid > last_tid)
4553 break;
4554
4555 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4556 continue;
4557
4558 ceph_osdc_get_request(req);
4559 mutex_unlock(&osd->lock);
4560 up_read(&osdc->lock);
4561 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4562 __func__, req, req->r_tid, last_tid);
4563 wait_for_completion(&req->r_completion);
4564 ceph_osdc_put_request(req);
4565 goto again;
4566 }
4567
4568 mutex_unlock(&osd->lock);
4569 }
4570
4571 up_read(&osdc->lock);
4572 dout("%s done last_tid %llu\n", __func__, last_tid);
4573 }
4574 EXPORT_SYMBOL(ceph_osdc_sync);
4575
4576 static struct ceph_osd_request *
4577 alloc_linger_request(struct ceph_osd_linger_request *lreq)
4578 {
4579 struct ceph_osd_request *req;
4580
4581 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4582 if (!req)
4583 return NULL;
4584
4585 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4586 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4587 return req;
4588 }
4589
4590 static struct ceph_osd_request *
4591 alloc_watch_request(struct ceph_osd_linger_request *lreq, u8 watch_opcode)
4592 {
4593 struct ceph_osd_request *req;
4594
4595 req = alloc_linger_request(lreq);
4596 if (!req)
4597 return NULL;
4598
4599
4600
4601
4602
4603 osd_req_op_watch_init(req, 0, 0, watch_opcode);
4604
4605 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4606 ceph_osdc_put_request(req);
4607 return NULL;
4608 }
4609
4610 return req;
4611 }
4612
4613
4614
4615
4616 struct ceph_osd_linger_request *
4617 ceph_osdc_watch(struct ceph_osd_client *osdc,
4618 struct ceph_object_id *oid,
4619 struct ceph_object_locator *oloc,
4620 rados_watchcb2_t wcb,
4621 rados_watcherrcb_t errcb,
4622 void *data)
4623 {
4624 struct ceph_osd_linger_request *lreq;
4625 int ret;
4626
4627 lreq = linger_alloc(osdc);
4628 if (!lreq)
4629 return ERR_PTR(-ENOMEM);
4630
4631 lreq->is_watch = true;
4632 lreq->wcb = wcb;
4633 lreq->errcb = errcb;
4634 lreq->data = data;
4635 lreq->watch_valid_thru = jiffies;
4636
4637 ceph_oid_copy(&lreq->t.base_oid, oid);
4638 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4639 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4640 ktime_get_real_ts64(&lreq->mtime);
4641
4642 lreq->reg_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_WATCH);
4643 if (!lreq->reg_req) {
4644 ret = -ENOMEM;
4645 goto err_put_lreq;
4646 }
4647
4648 lreq->ping_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_PING);
4649 if (!lreq->ping_req) {
4650 ret = -ENOMEM;
4651 goto err_put_lreq;
4652 }
4653
4654 linger_submit(lreq);
4655 ret = linger_reg_commit_wait(lreq);
4656 if (ret) {
4657 linger_cancel(lreq);
4658 goto err_put_lreq;
4659 }
4660
4661 return lreq;
4662
4663 err_put_lreq:
4664 linger_put(lreq);
4665 return ERR_PTR(ret);
4666 }
4667 EXPORT_SYMBOL(ceph_osdc_watch);
4668
4669
4670
4671
4672
4673
4674
4675
4676 int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4677 struct ceph_osd_linger_request *lreq)
4678 {
4679 struct ceph_options *opts = osdc->client->options;
4680 struct ceph_osd_request *req;
4681 int ret;
4682
4683 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4684 if (!req)
4685 return -ENOMEM;
4686
4687 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4688 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4689 req->r_flags = CEPH_OSD_FLAG_WRITE;
4690 ktime_get_real_ts64(&req->r_mtime);
4691 osd_req_op_watch_init(req, 0, lreq->linger_id,
4692 CEPH_OSD_WATCH_OP_UNWATCH);
4693
4694 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4695 if (ret)
4696 goto out_put_req;
4697
4698 ceph_osdc_start_request(osdc, req, false);
4699 linger_cancel(lreq);
4700 linger_put(lreq);
4701 ret = wait_request_timeout(req, opts->mount_timeout);
4702
4703 out_put_req:
4704 ceph_osdc_put_request(req);
4705 return ret;
4706 }
4707 EXPORT_SYMBOL(ceph_osdc_unwatch);
4708
4709 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4710 u64 notify_id, u64 cookie, void *payload,
4711 u32 payload_len)
4712 {
4713 struct ceph_osd_req_op *op;
4714 struct ceph_pagelist *pl;
4715 int ret;
4716
4717 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4718
4719 pl = ceph_pagelist_alloc(GFP_NOIO);
4720 if (!pl)
4721 return -ENOMEM;
4722
4723 ret = ceph_pagelist_encode_64(pl, notify_id);
4724 ret |= ceph_pagelist_encode_64(pl, cookie);
4725 if (payload) {
4726 ret |= ceph_pagelist_encode_32(pl, payload_len);
4727 ret |= ceph_pagelist_append(pl, payload, payload_len);
4728 } else {
4729 ret |= ceph_pagelist_encode_32(pl, 0);
4730 }
4731 if (ret) {
4732 ceph_pagelist_release(pl);
4733 return -ENOMEM;
4734 }
4735
4736 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4737 op->indata_len = pl->length;
4738 return 0;
4739 }
4740
4741 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4742 struct ceph_object_id *oid,
4743 struct ceph_object_locator *oloc,
4744 u64 notify_id,
4745 u64 cookie,
4746 void *payload,
4747 u32 payload_len)
4748 {
4749 struct ceph_osd_request *req;
4750 int ret;
4751
4752 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4753 if (!req)
4754 return -ENOMEM;
4755
4756 ceph_oid_copy(&req->r_base_oid, oid);
4757 ceph_oloc_copy(&req->r_base_oloc, oloc);
4758 req->r_flags = CEPH_OSD_FLAG_READ;
4759
4760 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4761 payload_len);
4762 if (ret)
4763 goto out_put_req;
4764
4765 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4766 if (ret)
4767 goto out_put_req;
4768
4769 ceph_osdc_start_request(osdc, req, false);
4770 ret = ceph_osdc_wait_request(osdc, req);
4771
4772 out_put_req:
4773 ceph_osdc_put_request(req);
4774 return ret;
4775 }
4776 EXPORT_SYMBOL(ceph_osdc_notify_ack);
4777
4778 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4779 u64 cookie, u32 prot_ver, u32 timeout,
4780 void *payload, u32 payload_len)
4781 {
4782 struct ceph_osd_req_op *op;
4783 struct ceph_pagelist *pl;
4784 int ret;
4785
4786 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4787 op->notify.cookie = cookie;
4788
4789 pl = ceph_pagelist_alloc(GFP_NOIO);
4790 if (!pl)
4791 return -ENOMEM;
4792
4793 ret = ceph_pagelist_encode_32(pl, 1);
4794 ret |= ceph_pagelist_encode_32(pl, timeout);
4795 ret |= ceph_pagelist_encode_32(pl, payload_len);
4796 ret |= ceph_pagelist_append(pl, payload, payload_len);
4797 if (ret) {
4798 ceph_pagelist_release(pl);
4799 return -ENOMEM;
4800 }
4801
4802 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4803 op->indata_len = pl->length;
4804 return 0;
4805 }
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815 int ceph_osdc_notify(struct ceph_osd_client *osdc,
4816 struct ceph_object_id *oid,
4817 struct ceph_object_locator *oloc,
4818 void *payload,
4819 u32 payload_len,
4820 u32 timeout,
4821 struct page ***preply_pages,
4822 size_t *preply_len)
4823 {
4824 struct ceph_osd_linger_request *lreq;
4825 struct page **pages;
4826 int ret;
4827
4828 WARN_ON(!timeout);
4829 if (preply_pages) {
4830 *preply_pages = NULL;
4831 *preply_len = 0;
4832 }
4833
4834 lreq = linger_alloc(osdc);
4835 if (!lreq)
4836 return -ENOMEM;
4837
4838 lreq->preply_pages = preply_pages;
4839 lreq->preply_len = preply_len;
4840
4841 ceph_oid_copy(&lreq->t.base_oid, oid);
4842 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4843 lreq->t.flags = CEPH_OSD_FLAG_READ;
4844
4845 lreq->reg_req = alloc_linger_request(lreq);
4846 if (!lreq->reg_req) {
4847 ret = -ENOMEM;
4848 goto out_put_lreq;
4849 }
4850
4851
4852
4853
4854
4855 ret = osd_req_op_notify_init(lreq->reg_req, 0, 0, 1, timeout,
4856 payload, payload_len);
4857 if (ret)
4858 goto out_put_lreq;
4859
4860
4861 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4862 if (IS_ERR(pages)) {
4863 ret = PTR_ERR(pages);
4864 goto out_put_lreq;
4865 }
4866 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4867 response_data),
4868 pages, PAGE_SIZE, 0, false, true);
4869
4870 ret = ceph_osdc_alloc_messages(lreq->reg_req, GFP_NOIO);
4871 if (ret)
4872 goto out_put_lreq;
4873
4874 linger_submit(lreq);
4875 ret = linger_reg_commit_wait(lreq);
4876 if (!ret)
4877 ret = linger_notify_finish_wait(lreq);
4878 else
4879 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4880
4881 linger_cancel(lreq);
4882 out_put_lreq:
4883 linger_put(lreq);
4884 return ret;
4885 }
4886 EXPORT_SYMBOL(ceph_osdc_notify);
4887
4888
4889
4890
4891
4892
4893 int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4894 struct ceph_osd_linger_request *lreq)
4895 {
4896 unsigned long stamp, age;
4897 int ret;
4898
4899 down_read(&osdc->lock);
4900 mutex_lock(&lreq->lock);
4901 stamp = lreq->watch_valid_thru;
4902 if (!list_empty(&lreq->pending_lworks)) {
4903 struct linger_work *lwork =
4904 list_first_entry(&lreq->pending_lworks,
4905 struct linger_work,
4906 pending_item);
4907
4908 if (time_before(lwork->queued_stamp, stamp))
4909 stamp = lwork->queued_stamp;
4910 }
4911 age = jiffies - stamp;
4912 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4913 lreq, lreq->linger_id, age, lreq->last_error);
4914
4915 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4916
4917 mutex_unlock(&lreq->lock);
4918 up_read(&osdc->lock);
4919 return ret;
4920 }
4921
4922 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4923 {
4924 u8 struct_v;
4925 u32 struct_len;
4926 int ret;
4927
4928 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4929 &struct_v, &struct_len);
4930 if (ret)
4931 goto bad;
4932
4933 ret = -EINVAL;
4934 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
4935 ceph_decode_64_safe(p, end, item->cookie, bad);
4936 ceph_decode_skip_32(p, end, bad);
4937
4938 if (struct_v >= 2) {
4939 ret = ceph_decode_entity_addr(p, end, &item->addr);
4940 if (ret)
4941 goto bad;
4942 } else {
4943 ret = 0;
4944 }
4945
4946 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4947 ENTITY_NAME(item->name), item->cookie,
4948 ceph_pr_addr(&item->addr));
4949 bad:
4950 return ret;
4951 }
4952
4953 static int decode_watchers(void **p, void *end,
4954 struct ceph_watch_item **watchers,
4955 u32 *num_watchers)
4956 {
4957 u8 struct_v;
4958 u32 struct_len;
4959 int i;
4960 int ret;
4961
4962 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4963 &struct_v, &struct_len);
4964 if (ret)
4965 return ret;
4966
4967 *num_watchers = ceph_decode_32(p);
4968 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4969 if (!*watchers)
4970 return -ENOMEM;
4971
4972 for (i = 0; i < *num_watchers; i++) {
4973 ret = decode_watcher(p, end, *watchers + i);
4974 if (ret) {
4975 kfree(*watchers);
4976 return ret;
4977 }
4978 }
4979
4980 return 0;
4981 }
4982
4983
4984
4985
4986
4987
4988 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
4989 struct ceph_object_id *oid,
4990 struct ceph_object_locator *oloc,
4991 struct ceph_watch_item **watchers,
4992 u32 *num_watchers)
4993 {
4994 struct ceph_osd_request *req;
4995 struct page **pages;
4996 int ret;
4997
4998 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4999 if (!req)
5000 return -ENOMEM;
5001
5002 ceph_oid_copy(&req->r_base_oid, oid);
5003 ceph_oloc_copy(&req->r_base_oloc, oloc);
5004 req->r_flags = CEPH_OSD_FLAG_READ;
5005
5006 pages = ceph_alloc_page_vector(1, GFP_NOIO);
5007 if (IS_ERR(pages)) {
5008 ret = PTR_ERR(pages);
5009 goto out_put_req;
5010 }
5011
5012 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
5013 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
5014 response_data),
5015 pages, PAGE_SIZE, 0, false, true);
5016
5017 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5018 if (ret)
5019 goto out_put_req;
5020
5021 ceph_osdc_start_request(osdc, req, false);
5022 ret = ceph_osdc_wait_request(osdc, req);
5023 if (ret >= 0) {
5024 void *p = page_address(pages[0]);
5025 void *const end = p + req->r_ops[0].outdata_len;
5026
5027 ret = decode_watchers(&p, end, watchers, num_watchers);
5028 }
5029
5030 out_put_req:
5031 ceph_osdc_put_request(req);
5032 return ret;
5033 }
5034 EXPORT_SYMBOL(ceph_osdc_list_watchers);
5035
5036
5037
5038
5039
5040 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
5041 {
5042 dout("%s osdc %p\n", __func__, osdc);
5043 flush_workqueue(osdc->notify_wq);
5044 }
5045 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5046
5047 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5048 {
5049 down_read(&osdc->lock);
5050 maybe_request_map(osdc);
5051 up_read(&osdc->lock);
5052 }
5053 EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
5054
5055
5056
5057
5058
5059
5060
5061 int ceph_osdc_call(struct ceph_osd_client *osdc,
5062 struct ceph_object_id *oid,
5063 struct ceph_object_locator *oloc,
5064 const char *class, const char *method,
5065 unsigned int flags,
5066 struct page *req_page, size_t req_len,
5067 struct page **resp_pages, size_t *resp_len)
5068 {
5069 struct ceph_osd_request *req;
5070 int ret;
5071
5072 if (req_len > PAGE_SIZE)
5073 return -E2BIG;
5074
5075 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5076 if (!req)
5077 return -ENOMEM;
5078
5079 ceph_oid_copy(&req->r_base_oid, oid);
5080 ceph_oloc_copy(&req->r_base_oloc, oloc);
5081 req->r_flags = flags;
5082
5083 ret = osd_req_op_cls_init(req, 0, class, method);
5084 if (ret)
5085 goto out_put_req;
5086
5087 if (req_page)
5088 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5089 0, false, false);
5090 if (resp_pages)
5091 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
5092 *resp_len, 0, false, false);
5093
5094 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5095 if (ret)
5096 goto out_put_req;
5097
5098 ceph_osdc_start_request(osdc, req, false);
5099 ret = ceph_osdc_wait_request(osdc, req);
5100 if (ret >= 0) {
5101 ret = req->r_ops[0].rval;
5102 if (resp_pages)
5103 *resp_len = req->r_ops[0].outdata_len;
5104 }
5105
5106 out_put_req:
5107 ceph_osdc_put_request(req);
5108 return ret;
5109 }
5110 EXPORT_SYMBOL(ceph_osdc_call);
5111
5112
5113
5114
5115 void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc)
5116 {
5117 struct rb_node *n;
5118
5119 down_write(&osdc->lock);
5120 for (n = rb_first(&osdc->osds); n; ) {
5121 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
5122
5123 n = rb_next(n);
5124 if (!reopen_osd(osd))
5125 kick_osd_requests(osd);
5126 }
5127 up_write(&osdc->lock);
5128 }
5129
5130
5131
5132
5133 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5134 {
5135 int err;
5136
5137 dout("init\n");
5138 osdc->client = client;
5139 init_rwsem(&osdc->lock);
5140 osdc->osds = RB_ROOT;
5141 INIT_LIST_HEAD(&osdc->osd_lru);
5142 spin_lock_init(&osdc->osd_lru_lock);
5143 osd_init(&osdc->homeless_osd);
5144 osdc->homeless_osd.o_osdc = osdc;
5145 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
5146 osdc->last_linger_id = CEPH_LINGER_ID_START;
5147 osdc->linger_requests = RB_ROOT;
5148 osdc->map_checks = RB_ROOT;
5149 osdc->linger_map_checks = RB_ROOT;
5150 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
5151 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5152
5153 err = -ENOMEM;
5154 osdc->osdmap = ceph_osdmap_alloc();
5155 if (!osdc->osdmap)
5156 goto out;
5157
5158 osdc->req_mempool = mempool_create_slab_pool(10,
5159 ceph_osd_request_cache);
5160 if (!osdc->req_mempool)
5161 goto out_map;
5162
5163 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
5164 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
5165 if (err < 0)
5166 goto out_mempool;
5167 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
5168 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5169 "osd_op_reply");
5170 if (err < 0)
5171 goto out_msgpool;
5172
5173 err = -ENOMEM;
5174 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
5175 if (!osdc->notify_wq)
5176 goto out_msgpool_reply;
5177
5178 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5179 if (!osdc->completion_wq)
5180 goto out_notify_wq;
5181
5182 schedule_delayed_work(&osdc->timeout_work,
5183 osdc->client->options->osd_keepalive_timeout);
5184 schedule_delayed_work(&osdc->osds_timeout_work,
5185 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5186
5187 return 0;
5188
5189 out_notify_wq:
5190 destroy_workqueue(osdc->notify_wq);
5191 out_msgpool_reply:
5192 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5193 out_msgpool:
5194 ceph_msgpool_destroy(&osdc->msgpool_op);
5195 out_mempool:
5196 mempool_destroy(osdc->req_mempool);
5197 out_map:
5198 ceph_osdmap_destroy(osdc->osdmap);
5199 out:
5200 return err;
5201 }
5202
5203 void ceph_osdc_stop(struct ceph_osd_client *osdc)
5204 {
5205 destroy_workqueue(osdc->completion_wq);
5206 destroy_workqueue(osdc->notify_wq);
5207 cancel_delayed_work_sync(&osdc->timeout_work);
5208 cancel_delayed_work_sync(&osdc->osds_timeout_work);
5209
5210 down_write(&osdc->lock);
5211 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5212 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5213 struct ceph_osd, o_node);
5214 close_osd(osd);
5215 }
5216 up_write(&osdc->lock);
5217 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5218 osd_cleanup(&osdc->homeless_osd);
5219
5220 WARN_ON(!list_empty(&osdc->osd_lru));
5221 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
5222 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5223 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5224 WARN_ON(atomic_read(&osdc->num_requests));
5225 WARN_ON(atomic_read(&osdc->num_homeless));
5226
5227 ceph_osdmap_destroy(osdc->osdmap);
5228 mempool_destroy(osdc->req_mempool);
5229 ceph_msgpool_destroy(&osdc->msgpool_op);
5230 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5231 }
5232
5233
5234
5235
5236
5237 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
5238 struct ceph_vino vino, struct ceph_file_layout *layout,
5239 u64 off, u64 *plen,
5240 u32 truncate_seq, u64 truncate_size,
5241 struct page **pages, int num_pages, int page_align)
5242 {
5243 struct ceph_osd_request *req;
5244 int rc = 0;
5245
5246 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
5247 vino.snap, off, *plen);
5248 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
5249 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
5250 NULL, truncate_seq, truncate_size,
5251 false);
5252 if (IS_ERR(req))
5253 return PTR_ERR(req);
5254
5255
5256 osd_req_op_extent_osd_data_pages(req, 0,
5257 pages, *plen, page_align, false, false);
5258
5259 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
5260 off, *plen, *plen, page_align);
5261
5262 rc = ceph_osdc_start_request(osdc, req, false);
5263 if (!rc)
5264 rc = ceph_osdc_wait_request(osdc, req);
5265
5266 ceph_osdc_put_request(req);
5267 dout("readpages result %d\n", rc);
5268 return rc;
5269 }
5270 EXPORT_SYMBOL(ceph_osdc_readpages);
5271
5272
5273
5274
5275 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
5276 struct ceph_file_layout *layout,
5277 struct ceph_snap_context *snapc,
5278 u64 off, u64 len,
5279 u32 truncate_seq, u64 truncate_size,
5280 struct timespec64 *mtime,
5281 struct page **pages, int num_pages)
5282 {
5283 struct ceph_osd_request *req;
5284 int rc = 0;
5285 int page_align = off & ~PAGE_MASK;
5286
5287 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
5288 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
5289 snapc, truncate_seq, truncate_size,
5290 true);
5291 if (IS_ERR(req))
5292 return PTR_ERR(req);
5293
5294
5295 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
5296 false, false);
5297 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
5298
5299 req->r_mtime = *mtime;
5300 rc = ceph_osdc_start_request(osdc, req, true);
5301 if (!rc)
5302 rc = ceph_osdc_wait_request(osdc, req);
5303
5304 ceph_osdc_put_request(req);
5305 if (rc == 0)
5306 rc = len;
5307 dout("writepages result %d\n", rc);
5308 return rc;
5309 }
5310 EXPORT_SYMBOL(ceph_osdc_writepages);
5311
5312 static int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5313 u64 src_snapid, u64 src_version,
5314 struct ceph_object_id *src_oid,
5315 struct ceph_object_locator *src_oloc,
5316 u32 src_fadvise_flags,
5317 u32 dst_fadvise_flags,
5318 u8 copy_from_flags)
5319 {
5320 struct ceph_osd_req_op *op;
5321 struct page **pages;
5322 void *p, *end;
5323
5324 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5325 if (IS_ERR(pages))
5326 return PTR_ERR(pages);
5327
5328 op = _osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM, dst_fadvise_flags);
5329 op->copy_from.snapid = src_snapid;
5330 op->copy_from.src_version = src_version;
5331 op->copy_from.flags = copy_from_flags;
5332 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5333
5334 p = page_address(pages[0]);
5335 end = p + PAGE_SIZE;
5336 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5337 encode_oloc(&p, end, src_oloc);
5338 op->indata_len = PAGE_SIZE - (end - p);
5339
5340 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5341 op->indata_len, 0, false, true);
5342 return 0;
5343 }
5344
5345 int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
5346 u64 src_snapid, u64 src_version,
5347 struct ceph_object_id *src_oid,
5348 struct ceph_object_locator *src_oloc,
5349 u32 src_fadvise_flags,
5350 struct ceph_object_id *dst_oid,
5351 struct ceph_object_locator *dst_oloc,
5352 u32 dst_fadvise_flags,
5353 u8 copy_from_flags)
5354 {
5355 struct ceph_osd_request *req;
5356 int ret;
5357
5358 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL);
5359 if (!req)
5360 return -ENOMEM;
5361
5362 req->r_flags = CEPH_OSD_FLAG_WRITE;
5363
5364 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
5365 ceph_oid_copy(&req->r_t.base_oid, dst_oid);
5366
5367 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid,
5368 src_oloc, src_fadvise_flags,
5369 dst_fadvise_flags, copy_from_flags);
5370 if (ret)
5371 goto out;
5372
5373 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL);
5374 if (ret)
5375 goto out;
5376
5377 ceph_osdc_start_request(osdc, req, false);
5378 ret = ceph_osdc_wait_request(osdc, req);
5379
5380 out:
5381 ceph_osdc_put_request(req);
5382 return ret;
5383 }
5384 EXPORT_SYMBOL(ceph_osdc_copy_from);
5385
5386 int __init ceph_osdc_setup(void)
5387 {
5388 size_t size = sizeof(struct ceph_osd_request) +
5389 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5390
5391 BUG_ON(ceph_osd_request_cache);
5392 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5393 0, 0, NULL);
5394
5395 return ceph_osd_request_cache ? 0 : -ENOMEM;
5396 }
5397
5398 void ceph_osdc_cleanup(void)
5399 {
5400 BUG_ON(!ceph_osd_request_cache);
5401 kmem_cache_destroy(ceph_osd_request_cache);
5402 ceph_osd_request_cache = NULL;
5403 }
5404
5405
5406
5407
5408 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5409 {
5410 struct ceph_osd *osd = con->private;
5411 struct ceph_osd_client *osdc = osd->o_osdc;
5412 int type = le16_to_cpu(msg->hdr.type);
5413
5414 switch (type) {
5415 case CEPH_MSG_OSD_MAP:
5416 ceph_osdc_handle_map(osdc, msg);
5417 break;
5418 case CEPH_MSG_OSD_OPREPLY:
5419 handle_reply(osd, msg);
5420 break;
5421 case CEPH_MSG_OSD_BACKOFF:
5422 handle_backoff(osd, msg);
5423 break;
5424 case CEPH_MSG_WATCH_NOTIFY:
5425 handle_watch_notify(osdc, msg);
5426 break;
5427
5428 default:
5429 pr_err("received unknown message type %d %s\n", type,
5430 ceph_msg_type_name(type));
5431 }
5432
5433 ceph_msg_put(msg);
5434 }
5435
5436
5437
5438
5439
5440
5441 static struct ceph_msg *get_reply(struct ceph_connection *con,
5442 struct ceph_msg_header *hdr,
5443 int *skip)
5444 {
5445 struct ceph_osd *osd = con->private;
5446 struct ceph_osd_client *osdc = osd->o_osdc;
5447 struct ceph_msg *m = NULL;
5448 struct ceph_osd_request *req;
5449 int front_len = le32_to_cpu(hdr->front_len);
5450 int data_len = le32_to_cpu(hdr->data_len);
5451 u64 tid = le64_to_cpu(hdr->tid);
5452
5453 down_read(&osdc->lock);
5454 if (!osd_registered(osd)) {
5455 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5456 *skip = 1;
5457 goto out_unlock_osdc;
5458 }
5459 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5460
5461 mutex_lock(&osd->lock);
5462 req = lookup_request(&osd->o_requests, tid);
5463 if (!req) {
5464 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5465 osd->o_osd, tid);
5466 *skip = 1;
5467 goto out_unlock_session;
5468 }
5469
5470 ceph_msg_revoke_incoming(req->r_reply);
5471
5472 if (front_len > req->r_reply->front_alloc_len) {
5473 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5474 __func__, osd->o_osd, req->r_tid, front_len,
5475 req->r_reply->front_alloc_len);
5476 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5477 false);
5478 if (!m)
5479 goto out_unlock_session;
5480 ceph_msg_put(req->r_reply);
5481 req->r_reply = m;
5482 }
5483
5484 if (data_len > req->r_reply->data_length) {
5485 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5486 __func__, osd->o_osd, req->r_tid, data_len,
5487 req->r_reply->data_length);
5488 m = NULL;
5489 *skip = 1;
5490 goto out_unlock_session;
5491 }
5492
5493 m = ceph_msg_get(req->r_reply);
5494 dout("get_reply tid %lld %p\n", tid, m);
5495
5496 out_unlock_session:
5497 mutex_unlock(&osd->lock);
5498 out_unlock_osdc:
5499 up_read(&osdc->lock);
5500 return m;
5501 }
5502
5503 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5504 {
5505 struct ceph_msg *m;
5506 int type = le16_to_cpu(hdr->type);
5507 u32 front_len = le32_to_cpu(hdr->front_len);
5508 u32 data_len = le32_to_cpu(hdr->data_len);
5509
5510 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
5511 if (!m)
5512 return NULL;
5513
5514 if (data_len) {
5515 struct page **pages;
5516
5517 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5518 GFP_NOIO);
5519 if (IS_ERR(pages)) {
5520 ceph_msg_put(m);
5521 return NULL;
5522 }
5523
5524 ceph_msg_data_add_pages(m, pages, data_len, 0, true);
5525 }
5526
5527 return m;
5528 }
5529
5530 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5531 struct ceph_msg_header *hdr,
5532 int *skip)
5533 {
5534 struct ceph_osd *osd = con->private;
5535 int type = le16_to_cpu(hdr->type);
5536
5537 *skip = 0;
5538 switch (type) {
5539 case CEPH_MSG_OSD_MAP:
5540 case CEPH_MSG_OSD_BACKOFF:
5541 case CEPH_MSG_WATCH_NOTIFY:
5542 return alloc_msg_with_page_vector(hdr);
5543 case CEPH_MSG_OSD_OPREPLY:
5544 return get_reply(con, hdr, skip);
5545 default:
5546 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5547 osd->o_osd, type);
5548 *skip = 1;
5549 return NULL;
5550 }
5551 }
5552
5553
5554
5555
5556 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5557 {
5558 struct ceph_osd *osd = con->private;
5559 if (get_osd(osd))
5560 return con;
5561 return NULL;
5562 }
5563
5564 static void put_osd_con(struct ceph_connection *con)
5565 {
5566 struct ceph_osd *osd = con->private;
5567 put_osd(osd);
5568 }
5569
5570
5571
5572
5573
5574
5575
5576
5577 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
5578 int *proto, int force_new)
5579 {
5580 struct ceph_osd *o = con->private;
5581 struct ceph_osd_client *osdc = o->o_osdc;
5582 struct ceph_auth_client *ac = osdc->client->monc.auth;
5583 struct ceph_auth_handshake *auth = &o->o_auth;
5584
5585 if (force_new && auth->authorizer) {
5586 ceph_auth_destroy_authorizer(auth->authorizer);
5587 auth->authorizer = NULL;
5588 }
5589 if (!auth->authorizer) {
5590 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5591 auth);
5592 if (ret)
5593 return ERR_PTR(ret);
5594 } else {
5595 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5596 auth);
5597 if (ret)
5598 return ERR_PTR(ret);
5599 }
5600 *proto = ac->protocol;
5601
5602 return auth;
5603 }
5604
5605 static int add_authorizer_challenge(struct ceph_connection *con,
5606 void *challenge_buf, int challenge_buf_len)
5607 {
5608 struct ceph_osd *o = con->private;
5609 struct ceph_osd_client *osdc = o->o_osdc;
5610 struct ceph_auth_client *ac = osdc->client->monc.auth;
5611
5612 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5613 challenge_buf, challenge_buf_len);
5614 }
5615
5616 static int verify_authorizer_reply(struct ceph_connection *con)
5617 {
5618 struct ceph_osd *o = con->private;
5619 struct ceph_osd_client *osdc = o->o_osdc;
5620 struct ceph_auth_client *ac = osdc->client->monc.auth;
5621
5622 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
5623 }
5624
5625 static int invalidate_authorizer(struct ceph_connection *con)
5626 {
5627 struct ceph_osd *o = con->private;
5628 struct ceph_osd_client *osdc = o->o_osdc;
5629 struct ceph_auth_client *ac = osdc->client->monc.auth;
5630
5631 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5632 return ceph_monc_validate_auth(&osdc->client->monc);
5633 }
5634
5635 static void osd_reencode_message(struct ceph_msg *msg)
5636 {
5637 int type = le16_to_cpu(msg->hdr.type);
5638
5639 if (type == CEPH_MSG_OSD_OP)
5640 encode_request_finish(msg);
5641 }
5642
5643 static int osd_sign_message(struct ceph_msg *msg)
5644 {
5645 struct ceph_osd *o = msg->con->private;
5646 struct ceph_auth_handshake *auth = &o->o_auth;
5647
5648 return ceph_auth_sign_message(auth, msg);
5649 }
5650
5651 static int osd_check_message_signature(struct ceph_msg *msg)
5652 {
5653 struct ceph_osd *o = msg->con->private;
5654 struct ceph_auth_handshake *auth = &o->o_auth;
5655
5656 return ceph_auth_check_message_signature(auth, msg);
5657 }
5658
5659 static const struct ceph_connection_operations osd_con_ops = {
5660 .get = get_osd_con,
5661 .put = put_osd_con,
5662 .dispatch = dispatch,
5663 .get_authorizer = get_authorizer,
5664 .add_authorizer_challenge = add_authorizer_challenge,
5665 .verify_authorizer_reply = verify_authorizer_reply,
5666 .invalidate_authorizer = invalidate_authorizer,
5667 .alloc_msg = alloc_msg,
5668 .reencode_message = osd_reencode_message,
5669 .sign_message = osd_sign_message,
5670 .check_message_signature = osd_check_message_signature,
5671 .fault = osd_fault,
5672 };