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f24e9980 SW |
1 | #include "ceph_debug.h" |
2 | ||
3 | #include <linux/err.h> | |
4 | #include <linux/highmem.h> | |
5 | #include <linux/mm.h> | |
6 | #include <linux/pagemap.h> | |
7 | #include <linux/slab.h> | |
8 | #include <linux/uaccess.h> | |
9 | ||
10 | #include "super.h" | |
11 | #include "osd_client.h" | |
12 | #include "messenger.h" | |
13 | #include "decode.h" | |
4e7a5dcd | 14 | #include "auth.h" |
f24e9980 SW |
15 | |
16 | const static struct ceph_connection_operations osd_con_ops; | |
17 | ||
18 | static void kick_requests(struct ceph_osd_client *osdc, struct ceph_osd *osd); | |
19 | ||
20 | /* | |
21 | * Implement client access to distributed object storage cluster. | |
22 | * | |
23 | * All data objects are stored within a cluster/cloud of OSDs, or | |
24 | * "object storage devices." (Note that Ceph OSDs have _nothing_ to | |
25 | * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply | |
26 | * remote daemons serving up and coordinating consistent and safe | |
27 | * access to storage. | |
28 | * | |
29 | * Cluster membership and the mapping of data objects onto storage devices | |
30 | * are described by the osd map. | |
31 | * | |
32 | * We keep track of pending OSD requests (read, write), resubmit | |
33 | * requests to different OSDs when the cluster topology/data layout | |
34 | * change, or retry the affected requests when the communications | |
35 | * channel with an OSD is reset. | |
36 | */ | |
37 | ||
38 | /* | |
39 | * calculate the mapping of a file extent onto an object, and fill out the | |
40 | * request accordingly. shorten extent as necessary if it crosses an | |
41 | * object boundary. | |
42 | * | |
43 | * fill osd op in request message. | |
44 | */ | |
45 | static void calc_layout(struct ceph_osd_client *osdc, | |
46 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
47 | u64 off, u64 *plen, | |
48 | struct ceph_osd_request *req) | |
49 | { | |
50 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51 | struct ceph_osd_op *op = (void *)(reqhead + 1); | |
52 | u64 orig_len = *plen; | |
53 | u64 objoff, objlen; /* extent in object */ | |
54 | u64 bno; | |
55 | ||
56 | reqhead->snapid = cpu_to_le64(vino.snap); | |
57 | ||
58 | /* object extent? */ | |
59 | ceph_calc_file_object_mapping(layout, off, plen, &bno, | |
60 | &objoff, &objlen); | |
61 | if (*plen < orig_len) | |
62 | dout(" skipping last %llu, final file extent %llu~%llu\n", | |
63 | orig_len - *plen, off, *plen); | |
64 | ||
65 | sprintf(req->r_oid, "%llx.%08llx", vino.ino, bno); | |
66 | req->r_oid_len = strlen(req->r_oid); | |
67 | ||
68 | op->extent.offset = cpu_to_le64(objoff); | |
69 | op->extent.length = cpu_to_le64(objlen); | |
70 | req->r_num_pages = calc_pages_for(off, *plen); | |
71 | ||
72 | dout("calc_layout %s (%d) %llu~%llu (%d pages)\n", | |
73 | req->r_oid, req->r_oid_len, objoff, objlen, req->r_num_pages); | |
74 | } | |
75 | ||
76 | ||
77 | /* | |
78 | * requests | |
79 | */ | |
415e49a9 | 80 | void ceph_osdc_release_request(struct kref *kref) |
f24e9980 | 81 | { |
415e49a9 SW |
82 | struct ceph_osd_request *req = container_of(kref, |
83 | struct ceph_osd_request, | |
84 | r_kref); | |
85 | ||
86 | if (req->r_request) | |
87 | ceph_msg_put(req->r_request); | |
88 | if (req->r_reply) | |
89 | ceph_msg_put(req->r_reply); | |
350b1c32 SW |
90 | if (req->r_con_filling_pages) { |
91 | dout("release_request revoking pages %p from con %p\n", | |
92 | req->r_pages, req->r_con_filling_pages); | |
93 | ceph_con_revoke_pages(req->r_con_filling_pages, | |
94 | req->r_pages); | |
95 | ceph_con_put(req->r_con_filling_pages); | |
96 | } | |
415e49a9 SW |
97 | if (req->r_own_pages) |
98 | ceph_release_page_vector(req->r_pages, | |
99 | req->r_num_pages); | |
100 | ceph_put_snap_context(req->r_snapc); | |
101 | if (req->r_mempool) | |
102 | mempool_free(req, req->r_osdc->req_mempool); | |
103 | else | |
104 | kfree(req); | |
f24e9980 SW |
105 | } |
106 | ||
107 | /* | |
108 | * build new request AND message, calculate layout, and adjust file | |
109 | * extent as needed. | |
110 | * | |
111 | * if the file was recently truncated, we include information about its | |
112 | * old and new size so that the object can be updated appropriately. (we | |
113 | * avoid synchronously deleting truncated objects because it's slow.) | |
114 | * | |
115 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
116 | * data quickly. | |
117 | */ | |
118 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
119 | struct ceph_file_layout *layout, | |
120 | struct ceph_vino vino, | |
121 | u64 off, u64 *plen, | |
122 | int opcode, int flags, | |
123 | struct ceph_snap_context *snapc, | |
124 | int do_sync, | |
125 | u32 truncate_seq, | |
126 | u64 truncate_size, | |
127 | struct timespec *mtime, | |
128 | bool use_mempool, int num_reply) | |
129 | { | |
130 | struct ceph_osd_request *req; | |
131 | struct ceph_msg *msg; | |
132 | struct ceph_osd_request_head *head; | |
133 | struct ceph_osd_op *op; | |
134 | void *p; | |
135 | int do_trunc = truncate_seq && (off + *plen > truncate_size); | |
136 | int num_op = 1 + do_sync + do_trunc; | |
137 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); | |
138 | int err, i; | |
139 | u64 prevofs; | |
140 | ||
141 | if (use_mempool) { | |
142 | req = mempool_alloc(osdc->req_mempool, GFP_NOFS); | |
143 | memset(req, 0, sizeof(*req)); | |
144 | } else { | |
145 | req = kzalloc(sizeof(*req), GFP_NOFS); | |
146 | } | |
147 | if (req == NULL) | |
148 | return ERR_PTR(-ENOMEM); | |
149 | ||
150 | err = ceph_msgpool_resv(&osdc->msgpool_op_reply, num_reply); | |
151 | if (err) { | |
152 | ceph_osdc_put_request(req); | |
153 | return ERR_PTR(-ENOMEM); | |
154 | } | |
93c20d98 | 155 | req->r_num_prealloc_reply = num_reply; |
f24e9980 SW |
156 | |
157 | req->r_osdc = osdc; | |
158 | req->r_mempool = use_mempool; | |
415e49a9 | 159 | kref_init(&req->r_kref); |
f24e9980 SW |
160 | init_completion(&req->r_completion); |
161 | init_completion(&req->r_safe_completion); | |
162 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
163 | req->r_flags = flags; | |
164 | ||
165 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
166 | ||
167 | /* create message; allow space for oid */ | |
168 | msg_size += 40; | |
169 | if (snapc) | |
170 | msg_size += sizeof(u64) * snapc->num_snaps; | |
171 | if (use_mempool) | |
8f3bc053 | 172 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 SW |
173 | else |
174 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, 0, 0, NULL); | |
175 | if (IS_ERR(msg)) { | |
93c20d98 | 176 | ceph_msgpool_resv(&osdc->msgpool_op_reply, -num_reply); |
f24e9980 SW |
177 | ceph_osdc_put_request(req); |
178 | return ERR_PTR(PTR_ERR(msg)); | |
179 | } | |
180 | msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP); | |
181 | memset(msg->front.iov_base, 0, msg->front.iov_len); | |
182 | head = msg->front.iov_base; | |
183 | op = (void *)(head + 1); | |
184 | p = (void *)(op + num_op); | |
185 | ||
186 | req->r_request = msg; | |
187 | req->r_snapc = ceph_get_snap_context(snapc); | |
188 | ||
189 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
190 | head->flags = cpu_to_le32(flags); | |
191 | if (flags & CEPH_OSD_FLAG_WRITE) | |
192 | ceph_encode_timespec(&head->mtime, mtime); | |
193 | head->num_ops = cpu_to_le16(num_op); | |
194 | op->op = cpu_to_le16(opcode); | |
195 | ||
196 | /* calculate max write size */ | |
197 | calc_layout(osdc, vino, layout, off, plen, req); | |
198 | req->r_file_layout = *layout; /* keep a copy */ | |
199 | ||
200 | if (flags & CEPH_OSD_FLAG_WRITE) { | |
201 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
202 | req->r_request->hdr.data_len = cpu_to_le32(*plen); | |
203 | op->payload_len = cpu_to_le32(*plen); | |
204 | } | |
205 | ||
206 | /* fill in oid */ | |
207 | head->object_len = cpu_to_le32(req->r_oid_len); | |
208 | memcpy(p, req->r_oid, req->r_oid_len); | |
209 | p += req->r_oid_len; | |
210 | ||
211 | /* additional ops */ | |
212 | if (do_trunc) { | |
213 | op++; | |
214 | op->op = cpu_to_le16(opcode == CEPH_OSD_OP_READ ? | |
215 | CEPH_OSD_OP_MASKTRUNC : CEPH_OSD_OP_SETTRUNC); | |
216 | op->trunc.truncate_seq = cpu_to_le32(truncate_seq); | |
217 | prevofs = le64_to_cpu((op-1)->extent.offset); | |
218 | op->trunc.truncate_size = cpu_to_le64(truncate_size - | |
219 | (off-prevofs)); | |
220 | } | |
221 | if (do_sync) { | |
222 | op++; | |
223 | op->op = cpu_to_le16(CEPH_OSD_OP_STARTSYNC); | |
224 | } | |
225 | if (snapc) { | |
226 | head->snap_seq = cpu_to_le64(snapc->seq); | |
227 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
228 | for (i = 0; i < snapc->num_snaps; i++) { | |
229 | put_unaligned_le64(snapc->snaps[i], p); | |
230 | p += sizeof(u64); | |
231 | } | |
232 | } | |
233 | ||
234 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); | |
235 | return req; | |
236 | } | |
237 | ||
238 | /* | |
239 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
240 | */ | |
241 | static void __insert_request(struct ceph_osd_client *osdc, | |
242 | struct ceph_osd_request *new) | |
243 | { | |
244 | struct rb_node **p = &osdc->requests.rb_node; | |
245 | struct rb_node *parent = NULL; | |
246 | struct ceph_osd_request *req = NULL; | |
247 | ||
248 | while (*p) { | |
249 | parent = *p; | |
250 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
251 | if (new->r_tid < req->r_tid) | |
252 | p = &(*p)->rb_left; | |
253 | else if (new->r_tid > req->r_tid) | |
254 | p = &(*p)->rb_right; | |
255 | else | |
256 | BUG(); | |
257 | } | |
258 | ||
259 | rb_link_node(&new->r_node, parent, p); | |
260 | rb_insert_color(&new->r_node, &osdc->requests); | |
261 | } | |
262 | ||
263 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
264 | u64 tid) | |
265 | { | |
266 | struct ceph_osd_request *req; | |
267 | struct rb_node *n = osdc->requests.rb_node; | |
268 | ||
269 | while (n) { | |
270 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
271 | if (tid < req->r_tid) | |
272 | n = n->rb_left; | |
273 | else if (tid > req->r_tid) | |
274 | n = n->rb_right; | |
275 | else | |
276 | return req; | |
277 | } | |
278 | return NULL; | |
279 | } | |
280 | ||
281 | static struct ceph_osd_request * | |
282 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
283 | u64 tid) | |
284 | { | |
285 | struct ceph_osd_request *req; | |
286 | struct rb_node *n = osdc->requests.rb_node; | |
287 | ||
288 | while (n) { | |
289 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
290 | if (tid < req->r_tid) { | |
291 | if (!n->rb_left) | |
292 | return req; | |
293 | n = n->rb_left; | |
294 | } else if (tid > req->r_tid) { | |
295 | n = n->rb_right; | |
296 | } else { | |
297 | return req; | |
298 | } | |
299 | } | |
300 | return NULL; | |
301 | } | |
302 | ||
303 | ||
304 | /* | |
81b024e7 | 305 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
306 | */ |
307 | static void osd_reset(struct ceph_connection *con) | |
308 | { | |
309 | struct ceph_osd *osd = con->private; | |
310 | struct ceph_osd_client *osdc; | |
311 | ||
312 | if (!osd) | |
313 | return; | |
314 | dout("osd_reset osd%d\n", osd->o_osd); | |
315 | osdc = osd->o_osdc; | |
316 | osd->o_incarnation++; | |
317 | down_read(&osdc->map_sem); | |
318 | kick_requests(osdc, osd); | |
319 | up_read(&osdc->map_sem); | |
320 | } | |
321 | ||
322 | /* | |
323 | * Track open sessions with osds. | |
324 | */ | |
325 | static struct ceph_osd *create_osd(struct ceph_osd_client *osdc) | |
326 | { | |
327 | struct ceph_osd *osd; | |
328 | ||
329 | osd = kzalloc(sizeof(*osd), GFP_NOFS); | |
330 | if (!osd) | |
331 | return NULL; | |
332 | ||
333 | atomic_set(&osd->o_ref, 1); | |
334 | osd->o_osdc = osdc; | |
335 | INIT_LIST_HEAD(&osd->o_requests); | |
336 | osd->o_incarnation = 1; | |
337 | ||
338 | ceph_con_init(osdc->client->msgr, &osd->o_con); | |
339 | osd->o_con.private = osd; | |
340 | osd->o_con.ops = &osd_con_ops; | |
341 | osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD; | |
4e7a5dcd | 342 | |
f24e9980 SW |
343 | return osd; |
344 | } | |
345 | ||
346 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
347 | { | |
348 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
349 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
350 | atomic_read(&osd->o_ref)); | |
351 | return osd; | |
352 | } else { | |
353 | dout("get_osd %p FAIL\n", osd); | |
354 | return NULL; | |
355 | } | |
356 | } | |
357 | ||
358 | static void put_osd(struct ceph_osd *osd) | |
359 | { | |
360 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
361 | atomic_read(&osd->o_ref) - 1); | |
42ce56e5 | 362 | if (atomic_dec_and_test(&osd->o_ref)) |
f24e9980 | 363 | kfree(osd); |
f24e9980 SW |
364 | } |
365 | ||
366 | /* | |
367 | * remove an osd from our map | |
368 | */ | |
369 | static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) | |
370 | { | |
371 | dout("remove_osd %p\n", osd); | |
372 | BUG_ON(!list_empty(&osd->o_requests)); | |
373 | rb_erase(&osd->o_node, &osdc->osds); | |
374 | ceph_con_close(&osd->o_con); | |
375 | put_osd(osd); | |
376 | } | |
377 | ||
378 | /* | |
379 | * reset osd connect | |
380 | */ | |
381 | static int reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) | |
382 | { | |
383 | int ret = 0; | |
384 | ||
385 | dout("reset_osd %p osd%d\n", osd, osd->o_osd); | |
386 | if (list_empty(&osd->o_requests)) { | |
387 | remove_osd(osdc, osd); | |
388 | } else { | |
389 | ceph_con_close(&osd->o_con); | |
390 | ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]); | |
391 | osd->o_incarnation++; | |
392 | } | |
393 | return ret; | |
394 | } | |
395 | ||
396 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
397 | { | |
398 | struct rb_node **p = &osdc->osds.rb_node; | |
399 | struct rb_node *parent = NULL; | |
400 | struct ceph_osd *osd = NULL; | |
401 | ||
402 | while (*p) { | |
403 | parent = *p; | |
404 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
405 | if (new->o_osd < osd->o_osd) | |
406 | p = &(*p)->rb_left; | |
407 | else if (new->o_osd > osd->o_osd) | |
408 | p = &(*p)->rb_right; | |
409 | else | |
410 | BUG(); | |
411 | } | |
412 | ||
413 | rb_link_node(&new->o_node, parent, p); | |
414 | rb_insert_color(&new->o_node, &osdc->osds); | |
415 | } | |
416 | ||
417 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
418 | { | |
419 | struct ceph_osd *osd; | |
420 | struct rb_node *n = osdc->osds.rb_node; | |
421 | ||
422 | while (n) { | |
423 | osd = rb_entry(n, struct ceph_osd, o_node); | |
424 | if (o < osd->o_osd) | |
425 | n = n->rb_left; | |
426 | else if (o > osd->o_osd) | |
427 | n = n->rb_right; | |
428 | else | |
429 | return osd; | |
430 | } | |
431 | return NULL; | |
432 | } | |
433 | ||
434 | ||
435 | /* | |
436 | * Register request, assign tid. If this is the first request, set up | |
437 | * the timeout event. | |
438 | */ | |
439 | static void register_request(struct ceph_osd_client *osdc, | |
440 | struct ceph_osd_request *req) | |
441 | { | |
f24e9980 SW |
442 | mutex_lock(&osdc->request_mutex); |
443 | req->r_tid = ++osdc->last_tid; | |
6df058c0 | 444 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
f24e9980 SW |
445 | |
446 | dout("register_request %p tid %lld\n", req, req->r_tid); | |
447 | __insert_request(osdc, req); | |
448 | ceph_osdc_get_request(req); | |
449 | osdc->num_requests++; | |
450 | ||
451 | req->r_timeout_stamp = | |
6b805185 | 452 | jiffies + osdc->client->mount_args->osd_timeout*HZ; |
f24e9980 SW |
453 | |
454 | if (osdc->num_requests == 1) { | |
455 | osdc->timeout_tid = req->r_tid; | |
456 | dout(" timeout on tid %llu at %lu\n", req->r_tid, | |
457 | req->r_timeout_stamp); | |
458 | schedule_delayed_work(&osdc->timeout_work, | |
459 | round_jiffies_relative(req->r_timeout_stamp - jiffies)); | |
460 | } | |
461 | mutex_unlock(&osdc->request_mutex); | |
462 | } | |
463 | ||
464 | /* | |
465 | * called under osdc->request_mutex | |
466 | */ | |
467 | static void __unregister_request(struct ceph_osd_client *osdc, | |
468 | struct ceph_osd_request *req) | |
469 | { | |
470 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); | |
471 | rb_erase(&req->r_node, &osdc->requests); | |
472 | osdc->num_requests--; | |
473 | ||
93c20d98 YS |
474 | ceph_msgpool_resv(&osdc->msgpool_op_reply, -req->r_num_prealloc_reply); |
475 | ||
0ba6478d SW |
476 | if (req->r_osd) { |
477 | /* make sure the original request isn't in flight. */ | |
478 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); | |
479 | ||
480 | list_del_init(&req->r_osd_item); | |
481 | if (list_empty(&req->r_osd->o_requests)) | |
482 | remove_osd(osdc, req->r_osd); | |
483 | req->r_osd = NULL; | |
484 | } | |
f24e9980 SW |
485 | |
486 | ceph_osdc_put_request(req); | |
487 | ||
488 | if (req->r_tid == osdc->timeout_tid) { | |
489 | if (osdc->num_requests == 0) { | |
490 | dout("no requests, canceling timeout\n"); | |
491 | osdc->timeout_tid = 0; | |
492 | cancel_delayed_work(&osdc->timeout_work); | |
493 | } else { | |
494 | req = rb_entry(rb_first(&osdc->requests), | |
495 | struct ceph_osd_request, r_node); | |
496 | osdc->timeout_tid = req->r_tid; | |
497 | dout("rescheduled timeout on tid %llu at %lu\n", | |
498 | req->r_tid, req->r_timeout_stamp); | |
499 | schedule_delayed_work(&osdc->timeout_work, | |
500 | round_jiffies_relative(req->r_timeout_stamp - | |
501 | jiffies)); | |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | /* | |
507 | * Cancel a previously queued request message | |
508 | */ | |
509 | static void __cancel_request(struct ceph_osd_request *req) | |
510 | { | |
511 | if (req->r_sent) { | |
512 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); | |
513 | req->r_sent = 0; | |
514 | } | |
515 | } | |
516 | ||
517 | /* | |
518 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
519 | * (as needed), and set the request r_osd appropriately. If there is | |
520 | * no up osd, set r_osd to NULL. | |
521 | * | |
522 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
523 | * | |
524 | * Caller should hold map_sem for read and request_mutex. | |
525 | */ | |
526 | static int __map_osds(struct ceph_osd_client *osdc, | |
527 | struct ceph_osd_request *req) | |
528 | { | |
529 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 530 | struct ceph_pg pgid; |
f24e9980 SW |
531 | int o = -1; |
532 | int err; | |
533 | struct ceph_osd *newosd = NULL; | |
534 | ||
535 | dout("map_osds %p tid %lld\n", req, req->r_tid); | |
536 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, | |
537 | &req->r_file_layout, osdc->osdmap); | |
538 | if (err) | |
539 | return err; | |
51042122 | 540 | pgid = reqhead->layout.ol_pgid; |
f24e9980 SW |
541 | o = ceph_calc_pg_primary(osdc->osdmap, pgid); |
542 | ||
543 | if ((req->r_osd && req->r_osd->o_osd == o && | |
544 | req->r_sent >= req->r_osd->o_incarnation) || | |
545 | (req->r_osd == NULL && o == -1)) | |
546 | return 0; /* no change */ | |
547 | ||
51042122 SW |
548 | dout("map_osds tid %llu pgid %d.%x osd%d (was osd%d)\n", |
549 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, | |
f24e9980 SW |
550 | req->r_osd ? req->r_osd->o_osd : -1); |
551 | ||
552 | if (req->r_osd) { | |
553 | __cancel_request(req); | |
554 | list_del_init(&req->r_osd_item); | |
555 | if (list_empty(&req->r_osd->o_requests)) { | |
556 | /* try to re-use r_osd if possible */ | |
557 | newosd = get_osd(req->r_osd); | |
558 | remove_osd(osdc, newosd); | |
559 | } | |
560 | req->r_osd = NULL; | |
561 | } | |
562 | ||
563 | req->r_osd = __lookup_osd(osdc, o); | |
564 | if (!req->r_osd && o >= 0) { | |
565 | if (newosd) { | |
566 | req->r_osd = newosd; | |
567 | newosd = NULL; | |
568 | } else { | |
569 | err = -ENOMEM; | |
570 | req->r_osd = create_osd(osdc); | |
571 | if (!req->r_osd) | |
572 | goto out; | |
573 | } | |
574 | ||
575 | dout("map_osds osd %p is osd%d\n", req->r_osd, o); | |
576 | req->r_osd->o_osd = o; | |
577 | req->r_osd->o_con.peer_name.num = cpu_to_le64(o); | |
578 | __insert_osd(osdc, req->r_osd); | |
579 | ||
580 | ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]); | |
581 | } | |
582 | ||
583 | if (req->r_osd) | |
584 | list_add(&req->r_osd_item, &req->r_osd->o_requests); | |
585 | err = 1; /* osd changed */ | |
586 | ||
587 | out: | |
588 | if (newosd) | |
589 | put_osd(newosd); | |
590 | return err; | |
591 | } | |
592 | ||
593 | /* | |
594 | * caller should hold map_sem (for read) and request_mutex | |
595 | */ | |
596 | static int __send_request(struct ceph_osd_client *osdc, | |
597 | struct ceph_osd_request *req) | |
598 | { | |
599 | struct ceph_osd_request_head *reqhead; | |
600 | int err; | |
601 | ||
602 | err = __map_osds(osdc, req); | |
603 | if (err < 0) | |
604 | return err; | |
605 | if (req->r_osd == NULL) { | |
606 | dout("send_request %p no up osds in pg\n", req); | |
607 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
608 | return 0; | |
609 | } | |
610 | ||
611 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
612 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
613 | ||
614 | reqhead = req->r_request->front.iov_base; | |
615 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
616 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
617 | reqhead->reassert_version = req->r_reassert_version; | |
618 | ||
6b805185 | 619 | req->r_timeout_stamp = jiffies+osdc->client->mount_args->osd_timeout*HZ; |
f24e9980 SW |
620 | |
621 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
622 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
623 | req->r_sent = req->r_osd->o_incarnation; | |
624 | return 0; | |
625 | } | |
626 | ||
627 | /* | |
628 | * Timeout callback, called every N seconds when 1 or more osd | |
629 | * requests has been active for more than N seconds. When this | |
630 | * happens, we ping all OSDs with requests who have timed out to | |
631 | * ensure any communications channel reset is detected. Reset the | |
632 | * request timeouts another N seconds in the future as we go. | |
633 | * Reschedule the timeout event another N seconds in future (unless | |
634 | * there are no open requests). | |
635 | */ | |
636 | static void handle_timeout(struct work_struct *work) | |
637 | { | |
638 | struct ceph_osd_client *osdc = | |
639 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
640 | struct ceph_osd_request *req; | |
641 | struct ceph_osd *osd; | |
6b805185 | 642 | unsigned long timeout = osdc->client->mount_args->osd_timeout * HZ; |
f24e9980 SW |
643 | unsigned long next_timeout = timeout + jiffies; |
644 | struct rb_node *p; | |
645 | ||
646 | dout("timeout\n"); | |
647 | down_read(&osdc->map_sem); | |
648 | ||
649 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
650 | ||
651 | mutex_lock(&osdc->request_mutex); | |
652 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
653 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
654 | ||
655 | if (req->r_resend) { | |
656 | int err; | |
657 | ||
658 | dout("osdc resending prev failed %lld\n", req->r_tid); | |
659 | err = __send_request(osdc, req); | |
660 | if (err) | |
661 | dout("osdc failed again on %lld\n", req->r_tid); | |
662 | else | |
663 | req->r_resend = false; | |
664 | continue; | |
665 | } | |
666 | } | |
667 | for (p = rb_first(&osdc->osds); p; p = rb_next(p)) { | |
668 | osd = rb_entry(p, struct ceph_osd, o_node); | |
669 | if (list_empty(&osd->o_requests)) | |
670 | continue; | |
671 | req = list_first_entry(&osd->o_requests, | |
672 | struct ceph_osd_request, r_osd_item); | |
673 | if (time_before(jiffies, req->r_timeout_stamp)) | |
674 | continue; | |
675 | ||
676 | dout(" tid %llu (at least) timed out on osd%d\n", | |
677 | req->r_tid, osd->o_osd); | |
678 | req->r_timeout_stamp = next_timeout; | |
679 | ceph_con_keepalive(&osd->o_con); | |
680 | } | |
681 | ||
682 | if (osdc->timeout_tid) | |
683 | schedule_delayed_work(&osdc->timeout_work, | |
684 | round_jiffies_relative(timeout)); | |
685 | ||
686 | mutex_unlock(&osdc->request_mutex); | |
687 | ||
688 | up_read(&osdc->map_sem); | |
689 | } | |
690 | ||
691 | /* | |
692 | * handle osd op reply. either call the callback if it is specified, | |
693 | * or do the completion to wake up the waiting thread. | |
694 | */ | |
350b1c32 SW |
695 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
696 | struct ceph_connection *con) | |
f24e9980 SW |
697 | { |
698 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
699 | struct ceph_osd_request *req; | |
700 | u64 tid; | |
701 | int numops, object_len, flags; | |
702 | ||
6df058c0 | 703 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
704 | if (msg->front.iov_len < sizeof(*rhead)) |
705 | goto bad; | |
f24e9980 SW |
706 | numops = le32_to_cpu(rhead->num_ops); |
707 | object_len = le32_to_cpu(rhead->object_len); | |
708 | if (msg->front.iov_len != sizeof(*rhead) + object_len + | |
709 | numops * sizeof(struct ceph_osd_op)) | |
710 | goto bad; | |
711 | dout("handle_reply %p tid %llu\n", msg, tid); | |
712 | ||
713 | /* lookup */ | |
714 | mutex_lock(&osdc->request_mutex); | |
715 | req = __lookup_request(osdc, tid); | |
716 | if (req == NULL) { | |
717 | dout("handle_reply tid %llu dne\n", tid); | |
718 | mutex_unlock(&osdc->request_mutex); | |
719 | return; | |
720 | } | |
721 | ceph_osdc_get_request(req); | |
722 | flags = le32_to_cpu(rhead->flags); | |
723 | ||
350b1c32 SW |
724 | /* |
725 | * if this connection filled our pages, drop our reference now, to | |
726 | * avoid a (safe but slower) revoke later. | |
727 | */ | |
728 | if (req->r_con_filling_pages == con && req->r_pages == msg->pages) { | |
729 | dout(" got pages, dropping con_filling_pages ref %p\n", con); | |
730 | req->r_con_filling_pages = NULL; | |
731 | ceph_con_put(con); | |
732 | } | |
733 | ||
f24e9980 SW |
734 | if (req->r_reply) { |
735 | /* | |
736 | * once we see the message has been received, we don't | |
737 | * need a ref (which is only needed for revoking | |
738 | * pages) | |
739 | */ | |
740 | ceph_msg_put(req->r_reply); | |
741 | req->r_reply = NULL; | |
742 | } | |
743 | ||
744 | if (!req->r_got_reply) { | |
745 | unsigned bytes; | |
746 | ||
747 | req->r_result = le32_to_cpu(rhead->result); | |
748 | bytes = le32_to_cpu(msg->hdr.data_len); | |
749 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
750 | bytes); | |
751 | if (req->r_result == 0) | |
752 | req->r_result = bytes; | |
753 | ||
754 | /* in case this is a write and we need to replay, */ | |
755 | req->r_reassert_version = rhead->reassert_version; | |
756 | ||
757 | req->r_got_reply = 1; | |
758 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
759 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 760 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
761 | goto done; |
762 | } | |
763 | ||
764 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
765 | ||
766 | /* either this is a read, or we got the safe response */ | |
767 | if ((flags & CEPH_OSD_FLAG_ONDISK) || | |
768 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) | |
769 | __unregister_request(osdc, req); | |
770 | ||
771 | mutex_unlock(&osdc->request_mutex); | |
772 | ||
773 | if (req->r_callback) | |
774 | req->r_callback(req, msg); | |
775 | else | |
776 | complete(&req->r_completion); | |
777 | ||
778 | if (flags & CEPH_OSD_FLAG_ONDISK) { | |
779 | if (req->r_safe_callback) | |
780 | req->r_safe_callback(req, msg); | |
781 | complete(&req->r_safe_completion); /* fsync waiter */ | |
782 | } | |
783 | ||
784 | done: | |
785 | ceph_osdc_put_request(req); | |
786 | return; | |
787 | ||
788 | bad: | |
789 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
790 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
791 | (int)sizeof(*rhead)); | |
9ec7cab1 | 792 | ceph_msg_dump(msg); |
f24e9980 SW |
793 | } |
794 | ||
795 | ||
796 | /* | |
797 | * Resubmit osd requests whose osd or osd address has changed. Request | |
798 | * a new osd map if osds are down, or we are otherwise unable to determine | |
799 | * how to direct a request. | |
800 | * | |
801 | * Close connections to down osds. | |
802 | * | |
803 | * If @who is specified, resubmit requests for that specific osd. | |
804 | * | |
805 | * Caller should hold map_sem for read and request_mutex. | |
806 | */ | |
807 | static void kick_requests(struct ceph_osd_client *osdc, | |
808 | struct ceph_osd *kickosd) | |
809 | { | |
810 | struct ceph_osd_request *req; | |
811 | struct rb_node *p, *n; | |
812 | int needmap = 0; | |
813 | int err; | |
814 | ||
815 | dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1); | |
816 | mutex_lock(&osdc->request_mutex); | |
817 | if (!kickosd) { | |
818 | for (p = rb_first(&osdc->osds); p; p = n) { | |
819 | struct ceph_osd *osd = | |
820 | rb_entry(p, struct ceph_osd, o_node); | |
821 | ||
822 | n = rb_next(p); | |
823 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
824 | !ceph_entity_addr_equal(&osd->o_con.peer_addr, | |
825 | ceph_osd_addr(osdc->osdmap, | |
826 | osd->o_osd))) | |
827 | reset_osd(osdc, osd); | |
828 | } | |
829 | } | |
830 | ||
831 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
832 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
833 | ||
834 | if (req->r_resend) { | |
835 | dout(" r_resend set on tid %llu\n", req->r_tid); | |
266673db | 836 | __cancel_request(req); |
f24e9980 SW |
837 | goto kick; |
838 | } | |
266673db SW |
839 | if (req->r_osd && kickosd == req->r_osd) { |
840 | __cancel_request(req); | |
f24e9980 | 841 | goto kick; |
266673db | 842 | } |
f24e9980 SW |
843 | |
844 | err = __map_osds(osdc, req); | |
845 | if (err == 0) | |
846 | continue; /* no change */ | |
847 | if (err < 0) { | |
848 | /* | |
849 | * FIXME: really, we should set the request | |
850 | * error and fail if this isn't a 'nofail' | |
851 | * request, but that's a fair bit more | |
852 | * complicated to do. So retry! | |
853 | */ | |
854 | dout(" setting r_resend on %llu\n", req->r_tid); | |
855 | req->r_resend = true; | |
856 | continue; | |
857 | } | |
858 | if (req->r_osd == NULL) { | |
859 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
860 | needmap++; /* request a newer map */ | |
861 | continue; | |
862 | } | |
863 | ||
864 | kick: | |
c1ea8823 SW |
865 | dout("kicking %p tid %llu osd%d\n", req, req->r_tid, |
866 | req->r_osd->o_osd); | |
f24e9980 SW |
867 | req->r_flags |= CEPH_OSD_FLAG_RETRY; |
868 | err = __send_request(osdc, req); | |
869 | if (err) { | |
870 | dout(" setting r_resend on %llu\n", req->r_tid); | |
871 | req->r_resend = true; | |
872 | } | |
873 | } | |
874 | mutex_unlock(&osdc->request_mutex); | |
875 | ||
876 | if (needmap) { | |
877 | dout("%d requests for down osds, need new map\n", needmap); | |
878 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
879 | } | |
880 | } | |
881 | ||
882 | /* | |
883 | * Process updated osd map. | |
884 | * | |
885 | * The message contains any number of incremental and full maps, normally | |
886 | * indicating some sort of topology change in the cluster. Kick requests | |
887 | * off to different OSDs as needed. | |
888 | */ | |
889 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
890 | { | |
891 | void *p, *end, *next; | |
892 | u32 nr_maps, maplen; | |
893 | u32 epoch; | |
894 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
895 | int err; | |
896 | struct ceph_fsid fsid; | |
897 | ||
898 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
899 | p = msg->front.iov_base; | |
900 | end = p + msg->front.iov_len; | |
901 | ||
902 | /* verify fsid */ | |
903 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
904 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
905 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
906 | return; | |
f24e9980 SW |
907 | |
908 | down_write(&osdc->map_sem); | |
909 | ||
910 | /* incremental maps */ | |
911 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
912 | dout(" %d inc maps\n", nr_maps); | |
913 | while (nr_maps > 0) { | |
914 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
915 | epoch = ceph_decode_32(&p); |
916 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
917 | ceph_decode_need(&p, end, maplen, bad); |
918 | next = p + maplen; | |
919 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
920 | dout("applying incremental map %u len %d\n", | |
921 | epoch, maplen); | |
922 | newmap = osdmap_apply_incremental(&p, next, | |
923 | osdc->osdmap, | |
924 | osdc->client->msgr); | |
925 | if (IS_ERR(newmap)) { | |
926 | err = PTR_ERR(newmap); | |
927 | goto bad; | |
928 | } | |
30dc6381 | 929 | BUG_ON(!newmap); |
f24e9980 SW |
930 | if (newmap != osdc->osdmap) { |
931 | ceph_osdmap_destroy(osdc->osdmap); | |
932 | osdc->osdmap = newmap; | |
933 | } | |
934 | } else { | |
935 | dout("ignoring incremental map %u len %d\n", | |
936 | epoch, maplen); | |
937 | } | |
938 | p = next; | |
939 | nr_maps--; | |
940 | } | |
941 | if (newmap) | |
942 | goto done; | |
943 | ||
944 | /* full maps */ | |
945 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
946 | dout(" %d full maps\n", nr_maps); | |
947 | while (nr_maps) { | |
948 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
949 | epoch = ceph_decode_32(&p); |
950 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
951 | ceph_decode_need(&p, end, maplen, bad); |
952 | if (nr_maps > 1) { | |
953 | dout("skipping non-latest full map %u len %d\n", | |
954 | epoch, maplen); | |
955 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
956 | dout("skipping full map %u len %d, " | |
957 | "older than our %u\n", epoch, maplen, | |
958 | osdc->osdmap->epoch); | |
959 | } else { | |
960 | dout("taking full map %u len %d\n", epoch, maplen); | |
961 | newmap = osdmap_decode(&p, p+maplen); | |
962 | if (IS_ERR(newmap)) { | |
963 | err = PTR_ERR(newmap); | |
964 | goto bad; | |
965 | } | |
30dc6381 | 966 | BUG_ON(!newmap); |
f24e9980 SW |
967 | oldmap = osdc->osdmap; |
968 | osdc->osdmap = newmap; | |
969 | if (oldmap) | |
970 | ceph_osdmap_destroy(oldmap); | |
971 | } | |
972 | p += maplen; | |
973 | nr_maps--; | |
974 | } | |
975 | ||
976 | done: | |
977 | downgrade_write(&osdc->map_sem); | |
978 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
979 | if (newmap) | |
980 | kick_requests(osdc, NULL); | |
981 | up_read(&osdc->map_sem); | |
982 | return; | |
983 | ||
984 | bad: | |
985 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 986 | ceph_msg_dump(msg); |
f24e9980 SW |
987 | up_write(&osdc->map_sem); |
988 | return; | |
989 | } | |
990 | ||
991 | ||
992 | /* | |
993 | * A read request prepares specific pages that data is to be read into. | |
994 | * When a message is being read off the wire, we call prepare_pages to | |
995 | * find those pages. | |
996 | * 0 = success, -1 failure. | |
997 | */ | |
998 | static int prepare_pages(struct ceph_connection *con, struct ceph_msg *m, | |
999 | int want) | |
1000 | { | |
1001 | struct ceph_osd *osd = con->private; | |
1002 | struct ceph_osd_client *osdc; | |
f24e9980 SW |
1003 | struct ceph_osd_request *req; |
1004 | u64 tid; | |
1005 | int ret = -1; | |
1006 | int type = le16_to_cpu(m->hdr.type); | |
1007 | ||
1008 | if (!osd) | |
1009 | return -1; | |
1010 | osdc = osd->o_osdc; | |
1011 | ||
1012 | dout("prepare_pages on msg %p want %d\n", m, want); | |
1013 | if (unlikely(type != CEPH_MSG_OSD_OPREPLY)) | |
1014 | return -1; /* hmm! */ | |
1015 | ||
6df058c0 | 1016 | tid = le64_to_cpu(m->hdr.tid); |
f24e9980 SW |
1017 | mutex_lock(&osdc->request_mutex); |
1018 | req = __lookup_request(osdc, tid); | |
1019 | if (!req) { | |
1020 | dout("prepare_pages unknown tid %llu\n", tid); | |
1021 | goto out; | |
1022 | } | |
1023 | dout("prepare_pages tid %llu has %d pages, want %d\n", | |
1024 | tid, req->r_num_pages, want); | |
350b1c32 SW |
1025 | if (unlikely(req->r_num_pages < want)) |
1026 | goto out; | |
1027 | ||
1028 | if (req->r_con_filling_pages) { | |
1029 | dout("revoking pages %p from old con %p\n", req->r_pages, | |
1030 | req->r_con_filling_pages); | |
1031 | ceph_con_revoke_pages(req->r_con_filling_pages, req->r_pages); | |
1032 | ceph_con_put(req->r_con_filling_pages); | |
f24e9980 | 1033 | } |
350b1c32 SW |
1034 | req->r_con_filling_pages = ceph_con_get(con); |
1035 | req->r_reply = ceph_msg_get(m); /* for duration of read over socket */ | |
1036 | m->pages = req->r_pages; | |
1037 | m->nr_pages = req->r_num_pages; | |
1038 | ret = 0; /* success */ | |
f24e9980 SW |
1039 | out: |
1040 | mutex_unlock(&osdc->request_mutex); | |
1041 | return ret; | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Register request, send initial attempt. | |
1046 | */ | |
1047 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1048 | struct ceph_osd_request *req, | |
1049 | bool nofail) | |
1050 | { | |
c1ea8823 | 1051 | int rc = 0; |
f24e9980 SW |
1052 | |
1053 | req->r_request->pages = req->r_pages; | |
1054 | req->r_request->nr_pages = req->r_num_pages; | |
1055 | ||
1056 | register_request(osdc, req); | |
1057 | ||
1058 | down_read(&osdc->map_sem); | |
1059 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1060 | /* |
1061 | * a racing kick_requests() may have sent the message for us | |
1062 | * while we dropped request_mutex above, so only send now if | |
1063 | * the request still han't been touched yet. | |
1064 | */ | |
1065 | if (req->r_sent == 0) { | |
1066 | rc = __send_request(osdc, req); | |
1067 | if (rc) { | |
1068 | if (nofail) { | |
1069 | dout("osdc_start_request failed send, " | |
1070 | " marking %lld\n", req->r_tid); | |
1071 | req->r_resend = true; | |
1072 | rc = 0; | |
1073 | } else { | |
1074 | __unregister_request(osdc, req); | |
1075 | } | |
f24e9980 SW |
1076 | } |
1077 | } | |
1078 | mutex_unlock(&osdc->request_mutex); | |
1079 | up_read(&osdc->map_sem); | |
1080 | return rc; | |
1081 | } | |
1082 | ||
1083 | /* | |
1084 | * wait for a request to complete | |
1085 | */ | |
1086 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1087 | struct ceph_osd_request *req) | |
1088 | { | |
1089 | int rc; | |
1090 | ||
1091 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1092 | if (rc < 0) { | |
1093 | mutex_lock(&osdc->request_mutex); | |
1094 | __cancel_request(req); | |
529cfcc4 | 1095 | __unregister_request(osdc, req); |
f24e9980 | 1096 | mutex_unlock(&osdc->request_mutex); |
529cfcc4 | 1097 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1098 | return rc; |
1099 | } | |
1100 | ||
1101 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1102 | return req->r_result; | |
1103 | } | |
1104 | ||
1105 | /* | |
1106 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1107 | */ | |
1108 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1109 | { | |
1110 | struct ceph_osd_request *req; | |
1111 | u64 last_tid, next_tid = 0; | |
1112 | ||
1113 | mutex_lock(&osdc->request_mutex); | |
1114 | last_tid = osdc->last_tid; | |
1115 | while (1) { | |
1116 | req = __lookup_request_ge(osdc, next_tid); | |
1117 | if (!req) | |
1118 | break; | |
1119 | if (req->r_tid > last_tid) | |
1120 | break; | |
1121 | ||
1122 | next_tid = req->r_tid + 1; | |
1123 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1124 | continue; | |
1125 | ||
1126 | ceph_osdc_get_request(req); | |
1127 | mutex_unlock(&osdc->request_mutex); | |
1128 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1129 | req->r_tid, last_tid); | |
1130 | wait_for_completion(&req->r_safe_completion); | |
1131 | mutex_lock(&osdc->request_mutex); | |
1132 | ceph_osdc_put_request(req); | |
1133 | } | |
1134 | mutex_unlock(&osdc->request_mutex); | |
1135 | dout("sync done (thru tid %llu)\n", last_tid); | |
1136 | } | |
1137 | ||
1138 | /* | |
1139 | * init, shutdown | |
1140 | */ | |
1141 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1142 | { | |
1143 | int err; | |
1144 | ||
1145 | dout("init\n"); | |
1146 | osdc->client = client; | |
1147 | osdc->osdmap = NULL; | |
1148 | init_rwsem(&osdc->map_sem); | |
1149 | init_completion(&osdc->map_waiters); | |
1150 | osdc->last_requested_map = 0; | |
1151 | mutex_init(&osdc->request_mutex); | |
1152 | osdc->timeout_tid = 0; | |
1153 | osdc->last_tid = 0; | |
1154 | osdc->osds = RB_ROOT; | |
1155 | osdc->requests = RB_ROOT; | |
1156 | osdc->num_requests = 0; | |
1157 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
1158 | ||
5f44f142 | 1159 | err = -ENOMEM; |
f24e9980 SW |
1160 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1161 | sizeof(struct ceph_osd_request)); | |
1162 | if (!osdc->req_mempool) | |
5f44f142 | 1163 | goto out; |
f24e9980 SW |
1164 | |
1165 | err = ceph_msgpool_init(&osdc->msgpool_op, 4096, 10, true); | |
1166 | if (err < 0) | |
5f44f142 | 1167 | goto out_mempool; |
f24e9980 SW |
1168 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, 512, 0, false); |
1169 | if (err < 0) | |
5f44f142 | 1170 | goto out_msgpool; |
f24e9980 | 1171 | return 0; |
5f44f142 SW |
1172 | |
1173 | out_msgpool: | |
1174 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
1175 | out_mempool: | |
1176 | mempool_destroy(osdc->req_mempool); | |
1177 | out: | |
1178 | return err; | |
f24e9980 SW |
1179 | } |
1180 | ||
1181 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1182 | { | |
1183 | cancel_delayed_work_sync(&osdc->timeout_work); | |
1184 | if (osdc->osdmap) { | |
1185 | ceph_osdmap_destroy(osdc->osdmap); | |
1186 | osdc->osdmap = NULL; | |
1187 | } | |
1188 | mempool_destroy(osdc->req_mempool); | |
1189 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
1190 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); | |
1191 | } | |
1192 | ||
1193 | /* | |
1194 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1195 | * *plen. Return number of bytes read, or error. | |
1196 | */ | |
1197 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1198 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1199 | u64 off, u64 *plen, | |
1200 | u32 truncate_seq, u64 truncate_size, | |
1201 | struct page **pages, int num_pages) | |
1202 | { | |
1203 | struct ceph_osd_request *req; | |
1204 | int rc = 0; | |
1205 | ||
1206 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1207 | vino.snap, off, *plen); | |
1208 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1209 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1210 | NULL, 0, truncate_seq, truncate_size, NULL, | |
1211 | false, 1); | |
1212 | if (IS_ERR(req)) | |
1213 | return PTR_ERR(req); | |
1214 | ||
1215 | /* it may be a short read due to an object boundary */ | |
1216 | req->r_pages = pages; | |
1217 | num_pages = calc_pages_for(off, *plen); | |
1218 | req->r_num_pages = num_pages; | |
1219 | ||
1220 | dout("readpages final extent is %llu~%llu (%d pages)\n", | |
1221 | off, *plen, req->r_num_pages); | |
1222 | ||
1223 | rc = ceph_osdc_start_request(osdc, req, false); | |
1224 | if (!rc) | |
1225 | rc = ceph_osdc_wait_request(osdc, req); | |
1226 | ||
1227 | ceph_osdc_put_request(req); | |
1228 | dout("readpages result %d\n", rc); | |
1229 | return rc; | |
1230 | } | |
1231 | ||
1232 | /* | |
1233 | * do a synchronous write on N pages | |
1234 | */ | |
1235 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1236 | struct ceph_file_layout *layout, | |
1237 | struct ceph_snap_context *snapc, | |
1238 | u64 off, u64 len, | |
1239 | u32 truncate_seq, u64 truncate_size, | |
1240 | struct timespec *mtime, | |
1241 | struct page **pages, int num_pages, | |
1242 | int flags, int do_sync, bool nofail) | |
1243 | { | |
1244 | struct ceph_osd_request *req; | |
1245 | int rc = 0; | |
1246 | ||
1247 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1248 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1249 | CEPH_OSD_OP_WRITE, | |
1250 | flags | CEPH_OSD_FLAG_ONDISK | | |
1251 | CEPH_OSD_FLAG_WRITE, | |
1252 | snapc, do_sync, | |
1253 | truncate_seq, truncate_size, mtime, | |
1254 | nofail, 1); | |
1255 | if (IS_ERR(req)) | |
1256 | return PTR_ERR(req); | |
1257 | ||
1258 | /* it may be a short write due to an object boundary */ | |
1259 | req->r_pages = pages; | |
1260 | req->r_num_pages = calc_pages_for(off, len); | |
1261 | dout("writepages %llu~%llu (%d pages)\n", off, len, | |
1262 | req->r_num_pages); | |
1263 | ||
1264 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1265 | if (!rc) | |
1266 | rc = ceph_osdc_wait_request(osdc, req); | |
1267 | ||
1268 | ceph_osdc_put_request(req); | |
1269 | if (rc == 0) | |
1270 | rc = len; | |
1271 | dout("writepages result %d\n", rc); | |
1272 | return rc; | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * handle incoming message | |
1277 | */ | |
1278 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1279 | { | |
1280 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1281 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1282 | int type = le16_to_cpu(msg->hdr.type); |
1283 | ||
1284 | if (!osd) | |
1285 | return; | |
32c895e7 | 1286 | osdc = osd->o_osdc; |
f24e9980 SW |
1287 | |
1288 | switch (type) { | |
1289 | case CEPH_MSG_OSD_MAP: | |
1290 | ceph_osdc_handle_map(osdc, msg); | |
1291 | break; | |
1292 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1293 | handle_reply(osdc, msg, con); |
f24e9980 SW |
1294 | break; |
1295 | ||
1296 | default: | |
1297 | pr_err("received unknown message type %d %s\n", type, | |
1298 | ceph_msg_type_name(type)); | |
1299 | } | |
1300 | ceph_msg_put(msg); | |
1301 | } | |
1302 | ||
1303 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
1304 | struct ceph_msg_header *hdr) | |
1305 | { | |
1306 | struct ceph_osd *osd = con->private; | |
1307 | struct ceph_osd_client *osdc = osd->o_osdc; | |
1308 | int type = le16_to_cpu(hdr->type); | |
8f3bc053 | 1309 | int front = le32_to_cpu(hdr->front_len); |
f24e9980 SW |
1310 | |
1311 | switch (type) { | |
1312 | case CEPH_MSG_OSD_OPREPLY: | |
8f3bc053 | 1313 | return ceph_msgpool_get(&osdc->msgpool_op_reply, front); |
f24e9980 SW |
1314 | } |
1315 | return ceph_alloc_msg(con, hdr); | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | * Wrappers to refcount containing ceph_osd struct | |
1320 | */ | |
1321 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
1322 | { | |
1323 | struct ceph_osd *osd = con->private; | |
1324 | if (get_osd(osd)) | |
1325 | return con; | |
1326 | return NULL; | |
1327 | } | |
1328 | ||
1329 | static void put_osd_con(struct ceph_connection *con) | |
1330 | { | |
1331 | struct ceph_osd *osd = con->private; | |
1332 | put_osd(osd); | |
1333 | } | |
1334 | ||
4e7a5dcd SW |
1335 | /* |
1336 | * authentication | |
1337 | */ | |
1338 | static int get_authorizer(struct ceph_connection *con, | |
50b885b9 SW |
1339 | void **buf, int *len, int *proto, |
1340 | void **reply_buf, int *reply_len, int force_new) | |
4e7a5dcd SW |
1341 | { |
1342 | struct ceph_osd *o = con->private; | |
1343 | struct ceph_osd_client *osdc = o->o_osdc; | |
1344 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1345 | int ret = 0; | |
1346 | ||
1347 | if (force_new && o->o_authorizer) { | |
1348 | ac->ops->destroy_authorizer(ac, o->o_authorizer); | |
1349 | o->o_authorizer = NULL; | |
1350 | } | |
1351 | if (o->o_authorizer == NULL) { | |
1352 | ret = ac->ops->create_authorizer( | |
1353 | ac, CEPH_ENTITY_TYPE_OSD, | |
1354 | &o->o_authorizer, | |
1355 | &o->o_authorizer_buf, | |
1356 | &o->o_authorizer_buf_len, | |
1357 | &o->o_authorizer_reply_buf, | |
1358 | &o->o_authorizer_reply_buf_len); | |
1359 | if (ret) | |
1360 | return ret; | |
1361 | } | |
1362 | ||
1363 | *proto = ac->protocol; | |
1364 | *buf = o->o_authorizer_buf; | |
1365 | *len = o->o_authorizer_buf_len; | |
1366 | *reply_buf = o->o_authorizer_reply_buf; | |
1367 | *reply_len = o->o_authorizer_reply_buf_len; | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | ||
1372 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
1373 | { | |
1374 | struct ceph_osd *o = con->private; | |
1375 | struct ceph_osd_client *osdc = o->o_osdc; | |
1376 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1377 | ||
1378 | return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len); | |
1379 | } | |
1380 | ||
1381 | ||
f24e9980 SW |
1382 | const static struct ceph_connection_operations osd_con_ops = { |
1383 | .get = get_osd_con, | |
1384 | .put = put_osd_con, | |
1385 | .dispatch = dispatch, | |
4e7a5dcd SW |
1386 | .get_authorizer = get_authorizer, |
1387 | .verify_authorizer_reply = verify_authorizer_reply, | |
f24e9980 | 1388 | .alloc_msg = alloc_msg, |
81b024e7 | 1389 | .fault = osd_reset, |
f24e9980 SW |
1390 | .alloc_middle = ceph_alloc_middle, |
1391 | .prepare_pages = prepare_pages, | |
1392 | }; |