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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 | 15 | |
c16e7869 SW |
16 | #define OSD_OP_FRONT_LEN 4096 |
17 | #define OSD_OPREPLY_FRONT_LEN 512 | |
0d59ab81 | 18 | |
f24e9980 | 19 | const static struct ceph_connection_operations osd_con_ops; |
422d2cb8 YS |
20 | static int __kick_requests(struct ceph_osd_client *osdc, |
21 | struct ceph_osd *kickosd); | |
f24e9980 SW |
22 | |
23 | static void kick_requests(struct ceph_osd_client *osdc, struct ceph_osd *osd); | |
24 | ||
25 | /* | |
26 | * Implement client access to distributed object storage cluster. | |
27 | * | |
28 | * All data objects are stored within a cluster/cloud of OSDs, or | |
29 | * "object storage devices." (Note that Ceph OSDs have _nothing_ to | |
30 | * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply | |
31 | * remote daemons serving up and coordinating consistent and safe | |
32 | * access to storage. | |
33 | * | |
34 | * Cluster membership and the mapping of data objects onto storage devices | |
35 | * are described by the osd map. | |
36 | * | |
37 | * We keep track of pending OSD requests (read, write), resubmit | |
38 | * requests to different OSDs when the cluster topology/data layout | |
39 | * change, or retry the affected requests when the communications | |
40 | * channel with an OSD is reset. | |
41 | */ | |
42 | ||
43 | /* | |
44 | * calculate the mapping of a file extent onto an object, and fill out the | |
45 | * request accordingly. shorten extent as necessary if it crosses an | |
46 | * object boundary. | |
47 | * | |
48 | * fill osd op in request message. | |
49 | */ | |
50 | static void calc_layout(struct ceph_osd_client *osdc, | |
51 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
52 | u64 off, u64 *plen, | |
53 | struct ceph_osd_request *req) | |
54 | { | |
55 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
56 | struct ceph_osd_op *op = (void *)(reqhead + 1); | |
57 | u64 orig_len = *plen; | |
58 | u64 objoff, objlen; /* extent in object */ | |
59 | u64 bno; | |
60 | ||
61 | reqhead->snapid = cpu_to_le64(vino.snap); | |
62 | ||
63 | /* object extent? */ | |
64 | ceph_calc_file_object_mapping(layout, off, plen, &bno, | |
65 | &objoff, &objlen); | |
66 | if (*plen < orig_len) | |
67 | dout(" skipping last %llu, final file extent %llu~%llu\n", | |
68 | orig_len - *plen, off, *plen); | |
69 | ||
70 | sprintf(req->r_oid, "%llx.%08llx", vino.ino, bno); | |
71 | req->r_oid_len = strlen(req->r_oid); | |
72 | ||
73 | op->extent.offset = cpu_to_le64(objoff); | |
74 | op->extent.length = cpu_to_le64(objlen); | |
75 | req->r_num_pages = calc_pages_for(off, *plen); | |
76 | ||
77 | dout("calc_layout %s (%d) %llu~%llu (%d pages)\n", | |
78 | req->r_oid, req->r_oid_len, objoff, objlen, req->r_num_pages); | |
79 | } | |
80 | ||
f24e9980 SW |
81 | /* |
82 | * requests | |
83 | */ | |
415e49a9 | 84 | void ceph_osdc_release_request(struct kref *kref) |
f24e9980 | 85 | { |
415e49a9 SW |
86 | struct ceph_osd_request *req = container_of(kref, |
87 | struct ceph_osd_request, | |
88 | r_kref); | |
89 | ||
90 | if (req->r_request) | |
91 | ceph_msg_put(req->r_request); | |
92 | if (req->r_reply) | |
93 | ceph_msg_put(req->r_reply); | |
0d59ab81 | 94 | if (req->r_con_filling_msg) { |
350b1c32 | 95 | dout("release_request revoking pages %p from con %p\n", |
0d59ab81 YS |
96 | req->r_pages, req->r_con_filling_msg); |
97 | ceph_con_revoke_message(req->r_con_filling_msg, | |
98 | req->r_reply); | |
99 | ceph_con_put(req->r_con_filling_msg); | |
350b1c32 | 100 | } |
415e49a9 SW |
101 | if (req->r_own_pages) |
102 | ceph_release_page_vector(req->r_pages, | |
103 | req->r_num_pages); | |
104 | ceph_put_snap_context(req->r_snapc); | |
105 | if (req->r_mempool) | |
106 | mempool_free(req, req->r_osdc->req_mempool); | |
107 | else | |
108 | kfree(req); | |
f24e9980 SW |
109 | } |
110 | ||
111 | /* | |
112 | * build new request AND message, calculate layout, and adjust file | |
113 | * extent as needed. | |
114 | * | |
115 | * if the file was recently truncated, we include information about its | |
116 | * old and new size so that the object can be updated appropriately. (we | |
117 | * avoid synchronously deleting truncated objects because it's slow.) | |
118 | * | |
119 | * if @do_sync, include a 'startsync' command so that the osd will flush | |
120 | * data quickly. | |
121 | */ | |
122 | struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, | |
123 | struct ceph_file_layout *layout, | |
124 | struct ceph_vino vino, | |
125 | u64 off, u64 *plen, | |
126 | int opcode, int flags, | |
127 | struct ceph_snap_context *snapc, | |
128 | int do_sync, | |
129 | u32 truncate_seq, | |
130 | u64 truncate_size, | |
131 | struct timespec *mtime, | |
132 | bool use_mempool, int num_reply) | |
133 | { | |
134 | struct ceph_osd_request *req; | |
135 | struct ceph_msg *msg; | |
136 | struct ceph_osd_request_head *head; | |
137 | struct ceph_osd_op *op; | |
138 | void *p; | |
0c948992 | 139 | int num_op = 1 + do_sync; |
f24e9980 | 140 | size_t msg_size = sizeof(*head) + num_op*sizeof(*op); |
c16e7869 | 141 | int i; |
f24e9980 SW |
142 | |
143 | if (use_mempool) { | |
144 | req = mempool_alloc(osdc->req_mempool, GFP_NOFS); | |
145 | memset(req, 0, sizeof(*req)); | |
146 | } else { | |
147 | req = kzalloc(sizeof(*req), GFP_NOFS); | |
148 | } | |
149 | if (req == NULL) | |
150 | return ERR_PTR(-ENOMEM); | |
151 | ||
f24e9980 SW |
152 | req->r_osdc = osdc; |
153 | req->r_mempool = use_mempool; | |
415e49a9 | 154 | kref_init(&req->r_kref); |
f24e9980 SW |
155 | init_completion(&req->r_completion); |
156 | init_completion(&req->r_safe_completion); | |
157 | INIT_LIST_HEAD(&req->r_unsafe_item); | |
158 | req->r_flags = flags; | |
159 | ||
160 | WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); | |
161 | ||
c16e7869 SW |
162 | /* create reply message */ |
163 | if (use_mempool) | |
164 | msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); | |
165 | else | |
166 | msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, | |
167 | OSD_OPREPLY_FRONT_LEN, 0, 0, NULL); | |
168 | if (IS_ERR(msg)) { | |
169 | ceph_osdc_put_request(req); | |
170 | return ERR_PTR(PTR_ERR(msg)); | |
171 | } | |
172 | req->r_reply = msg; | |
173 | ||
174 | /* create request message; allow space for oid */ | |
f24e9980 SW |
175 | msg_size += 40; |
176 | if (snapc) | |
177 | msg_size += sizeof(u64) * snapc->num_snaps; | |
178 | if (use_mempool) | |
8f3bc053 | 179 | msg = ceph_msgpool_get(&osdc->msgpool_op, 0); |
f24e9980 SW |
180 | else |
181 | msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, 0, 0, NULL); | |
182 | if (IS_ERR(msg)) { | |
f24e9980 SW |
183 | ceph_osdc_put_request(req); |
184 | return ERR_PTR(PTR_ERR(msg)); | |
185 | } | |
186 | msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP); | |
187 | memset(msg->front.iov_base, 0, msg->front.iov_len); | |
188 | head = msg->front.iov_base; | |
189 | op = (void *)(head + 1); | |
190 | p = (void *)(op + num_op); | |
191 | ||
192 | req->r_request = msg; | |
193 | req->r_snapc = ceph_get_snap_context(snapc); | |
194 | ||
195 | head->client_inc = cpu_to_le32(1); /* always, for now. */ | |
196 | head->flags = cpu_to_le32(flags); | |
197 | if (flags & CEPH_OSD_FLAG_WRITE) | |
198 | ceph_encode_timespec(&head->mtime, mtime); | |
199 | head->num_ops = cpu_to_le16(num_op); | |
200 | op->op = cpu_to_le16(opcode); | |
201 | ||
202 | /* calculate max write size */ | |
203 | calc_layout(osdc, vino, layout, off, plen, req); | |
204 | req->r_file_layout = *layout; /* keep a copy */ | |
205 | ||
206 | if (flags & CEPH_OSD_FLAG_WRITE) { | |
207 | req->r_request->hdr.data_off = cpu_to_le16(off); | |
208 | req->r_request->hdr.data_len = cpu_to_le32(*plen); | |
209 | op->payload_len = cpu_to_le32(*plen); | |
210 | } | |
0c948992 YS |
211 | op->extent.truncate_size = cpu_to_le64(truncate_size); |
212 | op->extent.truncate_seq = cpu_to_le32(truncate_seq); | |
f24e9980 SW |
213 | |
214 | /* fill in oid */ | |
215 | head->object_len = cpu_to_le32(req->r_oid_len); | |
216 | memcpy(p, req->r_oid, req->r_oid_len); | |
217 | p += req->r_oid_len; | |
218 | ||
f24e9980 SW |
219 | if (do_sync) { |
220 | op++; | |
221 | op->op = cpu_to_le16(CEPH_OSD_OP_STARTSYNC); | |
222 | } | |
223 | if (snapc) { | |
224 | head->snap_seq = cpu_to_le64(snapc->seq); | |
225 | head->num_snaps = cpu_to_le32(snapc->num_snaps); | |
226 | for (i = 0; i < snapc->num_snaps; i++) { | |
227 | put_unaligned_le64(snapc->snaps[i], p); | |
228 | p += sizeof(u64); | |
229 | } | |
230 | } | |
231 | ||
232 | BUG_ON(p > msg->front.iov_base + msg->front.iov_len); | |
6f863e71 SW |
233 | msg_size = p - msg->front.iov_base; |
234 | msg->front.iov_len = msg_size; | |
235 | msg->hdr.front_len = cpu_to_le32(msg_size); | |
f24e9980 SW |
236 | return req; |
237 | } | |
238 | ||
239 | /* | |
240 | * We keep osd requests in an rbtree, sorted by ->r_tid. | |
241 | */ | |
242 | static void __insert_request(struct ceph_osd_client *osdc, | |
243 | struct ceph_osd_request *new) | |
244 | { | |
245 | struct rb_node **p = &osdc->requests.rb_node; | |
246 | struct rb_node *parent = NULL; | |
247 | struct ceph_osd_request *req = NULL; | |
248 | ||
249 | while (*p) { | |
250 | parent = *p; | |
251 | req = rb_entry(parent, struct ceph_osd_request, r_node); | |
252 | if (new->r_tid < req->r_tid) | |
253 | p = &(*p)->rb_left; | |
254 | else if (new->r_tid > req->r_tid) | |
255 | p = &(*p)->rb_right; | |
256 | else | |
257 | BUG(); | |
258 | } | |
259 | ||
260 | rb_link_node(&new->r_node, parent, p); | |
261 | rb_insert_color(&new->r_node, &osdc->requests); | |
262 | } | |
263 | ||
264 | static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, | |
265 | u64 tid) | |
266 | { | |
267 | struct ceph_osd_request *req; | |
268 | struct rb_node *n = osdc->requests.rb_node; | |
269 | ||
270 | while (n) { | |
271 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
272 | if (tid < req->r_tid) | |
273 | n = n->rb_left; | |
274 | else if (tid > req->r_tid) | |
275 | n = n->rb_right; | |
276 | else | |
277 | return req; | |
278 | } | |
279 | return NULL; | |
280 | } | |
281 | ||
282 | static struct ceph_osd_request * | |
283 | __lookup_request_ge(struct ceph_osd_client *osdc, | |
284 | u64 tid) | |
285 | { | |
286 | struct ceph_osd_request *req; | |
287 | struct rb_node *n = osdc->requests.rb_node; | |
288 | ||
289 | while (n) { | |
290 | req = rb_entry(n, struct ceph_osd_request, r_node); | |
291 | if (tid < req->r_tid) { | |
292 | if (!n->rb_left) | |
293 | return req; | |
294 | n = n->rb_left; | |
295 | } else if (tid > req->r_tid) { | |
296 | n = n->rb_right; | |
297 | } else { | |
298 | return req; | |
299 | } | |
300 | } | |
301 | return NULL; | |
302 | } | |
303 | ||
304 | ||
305 | /* | |
81b024e7 | 306 | * If the osd connection drops, we need to resubmit all requests. |
f24e9980 SW |
307 | */ |
308 | static void osd_reset(struct ceph_connection *con) | |
309 | { | |
310 | struct ceph_osd *osd = con->private; | |
311 | struct ceph_osd_client *osdc; | |
312 | ||
313 | if (!osd) | |
314 | return; | |
315 | dout("osd_reset osd%d\n", osd->o_osd); | |
316 | osdc = osd->o_osdc; | |
f24e9980 SW |
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); | |
f5a2041b | 336 | INIT_LIST_HEAD(&osd->o_osd_lru); |
f24e9980 SW |
337 | osd->o_incarnation = 1; |
338 | ||
339 | ceph_con_init(osdc->client->msgr, &osd->o_con); | |
340 | osd->o_con.private = osd; | |
341 | osd->o_con.ops = &osd_con_ops; | |
342 | osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD; | |
4e7a5dcd | 343 | |
422d2cb8 | 344 | INIT_LIST_HEAD(&osd->o_keepalive_item); |
f24e9980 SW |
345 | return osd; |
346 | } | |
347 | ||
348 | static struct ceph_osd *get_osd(struct ceph_osd *osd) | |
349 | { | |
350 | if (atomic_inc_not_zero(&osd->o_ref)) { | |
351 | dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, | |
352 | atomic_read(&osd->o_ref)); | |
353 | return osd; | |
354 | } else { | |
355 | dout("get_osd %p FAIL\n", osd); | |
356 | return NULL; | |
357 | } | |
358 | } | |
359 | ||
360 | static void put_osd(struct ceph_osd *osd) | |
361 | { | |
362 | dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), | |
363 | atomic_read(&osd->o_ref) - 1); | |
42ce56e5 | 364 | if (atomic_dec_and_test(&osd->o_ref)) |
f24e9980 | 365 | kfree(osd); |
f24e9980 SW |
366 | } |
367 | ||
368 | /* | |
369 | * remove an osd from our map | |
370 | */ | |
f5a2041b | 371 | static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 372 | { |
f5a2041b | 373 | dout("__remove_osd %p\n", osd); |
f24e9980 SW |
374 | BUG_ON(!list_empty(&osd->o_requests)); |
375 | rb_erase(&osd->o_node, &osdc->osds); | |
f5a2041b | 376 | list_del_init(&osd->o_osd_lru); |
f24e9980 SW |
377 | ceph_con_close(&osd->o_con); |
378 | put_osd(osd); | |
379 | } | |
380 | ||
f5a2041b YS |
381 | static void __move_osd_to_lru(struct ceph_osd_client *osdc, |
382 | struct ceph_osd *osd) | |
383 | { | |
384 | dout("__move_osd_to_lru %p\n", osd); | |
385 | BUG_ON(!list_empty(&osd->o_osd_lru)); | |
386 | list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); | |
387 | osd->lru_ttl = jiffies + osdc->client->mount_args->osd_idle_ttl * HZ; | |
388 | } | |
389 | ||
390 | static void __remove_osd_from_lru(struct ceph_osd *osd) | |
391 | { | |
392 | dout("__remove_osd_from_lru %p\n", osd); | |
393 | if (!list_empty(&osd->o_osd_lru)) | |
394 | list_del_init(&osd->o_osd_lru); | |
395 | } | |
396 | ||
397 | static void remove_old_osds(struct ceph_osd_client *osdc, int remove_all) | |
398 | { | |
399 | struct ceph_osd *osd, *nosd; | |
400 | ||
401 | dout("__remove_old_osds %p\n", osdc); | |
402 | mutex_lock(&osdc->request_mutex); | |
403 | list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { | |
404 | if (!remove_all && time_before(jiffies, osd->lru_ttl)) | |
405 | break; | |
406 | __remove_osd(osdc, osd); | |
407 | } | |
408 | mutex_unlock(&osdc->request_mutex); | |
409 | } | |
410 | ||
f24e9980 SW |
411 | /* |
412 | * reset osd connect | |
413 | */ | |
f5a2041b | 414 | static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) |
f24e9980 | 415 | { |
87b315a5 | 416 | struct ceph_osd_request *req; |
f24e9980 SW |
417 | int ret = 0; |
418 | ||
f5a2041b | 419 | dout("__reset_osd %p osd%d\n", osd, osd->o_osd); |
f24e9980 | 420 | if (list_empty(&osd->o_requests)) { |
f5a2041b | 421 | __remove_osd(osdc, osd); |
87b315a5 SW |
422 | } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd], |
423 | &osd->o_con.peer_addr, | |
424 | sizeof(osd->o_con.peer_addr)) == 0 && | |
425 | !ceph_con_opened(&osd->o_con)) { | |
426 | dout(" osd addr hasn't changed and connection never opened," | |
427 | " letting msgr retry"); | |
428 | /* touch each r_stamp for handle_timeout()'s benfit */ | |
429 | list_for_each_entry(req, &osd->o_requests, r_osd_item) | |
430 | req->r_stamp = jiffies; | |
431 | ret = -EAGAIN; | |
f24e9980 SW |
432 | } else { |
433 | ceph_con_close(&osd->o_con); | |
434 | ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]); | |
435 | osd->o_incarnation++; | |
436 | } | |
437 | return ret; | |
438 | } | |
439 | ||
440 | static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) | |
441 | { | |
442 | struct rb_node **p = &osdc->osds.rb_node; | |
443 | struct rb_node *parent = NULL; | |
444 | struct ceph_osd *osd = NULL; | |
445 | ||
446 | while (*p) { | |
447 | parent = *p; | |
448 | osd = rb_entry(parent, struct ceph_osd, o_node); | |
449 | if (new->o_osd < osd->o_osd) | |
450 | p = &(*p)->rb_left; | |
451 | else if (new->o_osd > osd->o_osd) | |
452 | p = &(*p)->rb_right; | |
453 | else | |
454 | BUG(); | |
455 | } | |
456 | ||
457 | rb_link_node(&new->o_node, parent, p); | |
458 | rb_insert_color(&new->o_node, &osdc->osds); | |
459 | } | |
460 | ||
461 | static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) | |
462 | { | |
463 | struct ceph_osd *osd; | |
464 | struct rb_node *n = osdc->osds.rb_node; | |
465 | ||
466 | while (n) { | |
467 | osd = rb_entry(n, struct ceph_osd, o_node); | |
468 | if (o < osd->o_osd) | |
469 | n = n->rb_left; | |
470 | else if (o > osd->o_osd) | |
471 | n = n->rb_right; | |
472 | else | |
473 | return osd; | |
474 | } | |
475 | return NULL; | |
476 | } | |
477 | ||
422d2cb8 YS |
478 | static void __schedule_osd_timeout(struct ceph_osd_client *osdc) |
479 | { | |
480 | schedule_delayed_work(&osdc->timeout_work, | |
481 | osdc->client->mount_args->osd_keepalive_timeout * HZ); | |
482 | } | |
483 | ||
484 | static void __cancel_osd_timeout(struct ceph_osd_client *osdc) | |
485 | { | |
486 | cancel_delayed_work(&osdc->timeout_work); | |
487 | } | |
f24e9980 SW |
488 | |
489 | /* | |
490 | * Register request, assign tid. If this is the first request, set up | |
491 | * the timeout event. | |
492 | */ | |
493 | static void register_request(struct ceph_osd_client *osdc, | |
494 | struct ceph_osd_request *req) | |
495 | { | |
f24e9980 SW |
496 | mutex_lock(&osdc->request_mutex); |
497 | req->r_tid = ++osdc->last_tid; | |
6df058c0 | 498 | req->r_request->hdr.tid = cpu_to_le64(req->r_tid); |
422d2cb8 | 499 | INIT_LIST_HEAD(&req->r_req_lru_item); |
f24e9980 SW |
500 | |
501 | dout("register_request %p tid %lld\n", req, req->r_tid); | |
502 | __insert_request(osdc, req); | |
503 | ceph_osdc_get_request(req); | |
504 | osdc->num_requests++; | |
505 | ||
f24e9980 | 506 | if (osdc->num_requests == 1) { |
422d2cb8 YS |
507 | dout(" first request, scheduling timeout\n"); |
508 | __schedule_osd_timeout(osdc); | |
f24e9980 SW |
509 | } |
510 | mutex_unlock(&osdc->request_mutex); | |
511 | } | |
512 | ||
513 | /* | |
514 | * called under osdc->request_mutex | |
515 | */ | |
516 | static void __unregister_request(struct ceph_osd_client *osdc, | |
517 | struct ceph_osd_request *req) | |
518 | { | |
519 | dout("__unregister_request %p tid %lld\n", req, req->r_tid); | |
520 | rb_erase(&req->r_node, &osdc->requests); | |
521 | osdc->num_requests--; | |
522 | ||
0ba6478d SW |
523 | if (req->r_osd) { |
524 | /* make sure the original request isn't in flight. */ | |
525 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); | |
526 | ||
527 | list_del_init(&req->r_osd_item); | |
528 | if (list_empty(&req->r_osd->o_requests)) | |
f5a2041b | 529 | __move_osd_to_lru(osdc, req->r_osd); |
0ba6478d SW |
530 | req->r_osd = NULL; |
531 | } | |
f24e9980 SW |
532 | |
533 | ceph_osdc_put_request(req); | |
534 | ||
422d2cb8 YS |
535 | list_del_init(&req->r_req_lru_item); |
536 | if (osdc->num_requests == 0) { | |
537 | dout(" no requests, canceling timeout\n"); | |
538 | __cancel_osd_timeout(osdc); | |
f24e9980 SW |
539 | } |
540 | } | |
541 | ||
542 | /* | |
543 | * Cancel a previously queued request message | |
544 | */ | |
545 | static void __cancel_request(struct ceph_osd_request *req) | |
546 | { | |
547 | if (req->r_sent) { | |
548 | ceph_con_revoke(&req->r_osd->o_con, req->r_request); | |
549 | req->r_sent = 0; | |
550 | } | |
422d2cb8 | 551 | list_del_init(&req->r_req_lru_item); |
f24e9980 SW |
552 | } |
553 | ||
554 | /* | |
555 | * Pick an osd (the first 'up' osd in the pg), allocate the osd struct | |
556 | * (as needed), and set the request r_osd appropriately. If there is | |
557 | * no up osd, set r_osd to NULL. | |
558 | * | |
559 | * Return 0 if unchanged, 1 if changed, or negative on error. | |
560 | * | |
561 | * Caller should hold map_sem for read and request_mutex. | |
562 | */ | |
563 | static int __map_osds(struct ceph_osd_client *osdc, | |
564 | struct ceph_osd_request *req) | |
565 | { | |
566 | struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base; | |
51042122 | 567 | struct ceph_pg pgid; |
f24e9980 SW |
568 | int o = -1; |
569 | int err; | |
f24e9980 SW |
570 | |
571 | dout("map_osds %p tid %lld\n", req, req->r_tid); | |
572 | err = ceph_calc_object_layout(&reqhead->layout, req->r_oid, | |
573 | &req->r_file_layout, osdc->osdmap); | |
574 | if (err) | |
575 | return err; | |
51042122 | 576 | pgid = reqhead->layout.ol_pgid; |
7740a42f SW |
577 | req->r_pgid = pgid; |
578 | ||
f24e9980 SW |
579 | o = ceph_calc_pg_primary(osdc->osdmap, pgid); |
580 | ||
581 | if ((req->r_osd && req->r_osd->o_osd == o && | |
582 | req->r_sent >= req->r_osd->o_incarnation) || | |
583 | (req->r_osd == NULL && o == -1)) | |
584 | return 0; /* no change */ | |
585 | ||
51042122 SW |
586 | dout("map_osds tid %llu pgid %d.%x osd%d (was osd%d)\n", |
587 | req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o, | |
f24e9980 SW |
588 | req->r_osd ? req->r_osd->o_osd : -1); |
589 | ||
590 | if (req->r_osd) { | |
591 | __cancel_request(req); | |
592 | list_del_init(&req->r_osd_item); | |
f24e9980 SW |
593 | req->r_osd = NULL; |
594 | } | |
595 | ||
596 | req->r_osd = __lookup_osd(osdc, o); | |
597 | if (!req->r_osd && o >= 0) { | |
c99eb1c7 SW |
598 | err = -ENOMEM; |
599 | req->r_osd = create_osd(osdc); | |
600 | if (!req->r_osd) | |
601 | goto out; | |
f24e9980 SW |
602 | |
603 | dout("map_osds osd %p is osd%d\n", req->r_osd, o); | |
604 | req->r_osd->o_osd = o; | |
605 | req->r_osd->o_con.peer_name.num = cpu_to_le64(o); | |
606 | __insert_osd(osdc, req->r_osd); | |
607 | ||
608 | ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]); | |
609 | } | |
610 | ||
f5a2041b YS |
611 | if (req->r_osd) { |
612 | __remove_osd_from_lru(req->r_osd); | |
f24e9980 | 613 | list_add(&req->r_osd_item, &req->r_osd->o_requests); |
f5a2041b | 614 | } |
f24e9980 SW |
615 | err = 1; /* osd changed */ |
616 | ||
617 | out: | |
f24e9980 SW |
618 | return err; |
619 | } | |
620 | ||
621 | /* | |
622 | * caller should hold map_sem (for read) and request_mutex | |
623 | */ | |
624 | static int __send_request(struct ceph_osd_client *osdc, | |
625 | struct ceph_osd_request *req) | |
626 | { | |
627 | struct ceph_osd_request_head *reqhead; | |
628 | int err; | |
629 | ||
630 | err = __map_osds(osdc, req); | |
631 | if (err < 0) | |
632 | return err; | |
633 | if (req->r_osd == NULL) { | |
634 | dout("send_request %p no up osds in pg\n", req); | |
635 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
636 | return 0; | |
637 | } | |
638 | ||
639 | dout("send_request %p tid %llu to osd%d flags %d\n", | |
640 | req, req->r_tid, req->r_osd->o_osd, req->r_flags); | |
641 | ||
642 | reqhead = req->r_request->front.iov_base; | |
643 | reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch); | |
644 | reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */ | |
645 | reqhead->reassert_version = req->r_reassert_version; | |
646 | ||
3dd72fc0 | 647 | req->r_stamp = jiffies; |
422d2cb8 | 648 | list_move_tail(&osdc->req_lru, &req->r_req_lru_item); |
f24e9980 SW |
649 | |
650 | ceph_msg_get(req->r_request); /* send consumes a ref */ | |
651 | ceph_con_send(&req->r_osd->o_con, req->r_request); | |
652 | req->r_sent = req->r_osd->o_incarnation; | |
653 | return 0; | |
654 | } | |
655 | ||
656 | /* | |
657 | * Timeout callback, called every N seconds when 1 or more osd | |
658 | * requests has been active for more than N seconds. When this | |
659 | * happens, we ping all OSDs with requests who have timed out to | |
660 | * ensure any communications channel reset is detected. Reset the | |
661 | * request timeouts another N seconds in the future as we go. | |
662 | * Reschedule the timeout event another N seconds in future (unless | |
663 | * there are no open requests). | |
664 | */ | |
665 | static void handle_timeout(struct work_struct *work) | |
666 | { | |
667 | struct ceph_osd_client *osdc = | |
668 | container_of(work, struct ceph_osd_client, timeout_work.work); | |
422d2cb8 | 669 | struct ceph_osd_request *req, *last_req = NULL; |
f24e9980 | 670 | struct ceph_osd *osd; |
6b805185 | 671 | unsigned long timeout = osdc->client->mount_args->osd_timeout * HZ; |
422d2cb8 YS |
672 | unsigned long keepalive = |
673 | osdc->client->mount_args->osd_keepalive_timeout * HZ; | |
3dd72fc0 | 674 | unsigned long last_stamp = 0; |
f24e9980 | 675 | struct rb_node *p; |
422d2cb8 | 676 | struct list_head slow_osds; |
f24e9980 SW |
677 | |
678 | dout("timeout\n"); | |
679 | down_read(&osdc->map_sem); | |
680 | ||
681 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
682 | ||
683 | mutex_lock(&osdc->request_mutex); | |
684 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
685 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
686 | ||
687 | if (req->r_resend) { | |
688 | int err; | |
689 | ||
690 | dout("osdc resending prev failed %lld\n", req->r_tid); | |
691 | err = __send_request(osdc, req); | |
692 | if (err) | |
693 | dout("osdc failed again on %lld\n", req->r_tid); | |
694 | else | |
695 | req->r_resend = false; | |
696 | continue; | |
697 | } | |
698 | } | |
f24e9980 | 699 | |
422d2cb8 YS |
700 | /* |
701 | * reset osds that appear to be _really_ unresponsive. this | |
702 | * is a failsafe measure.. we really shouldn't be getting to | |
703 | * this point if the system is working properly. the monitors | |
704 | * should mark the osd as failed and we should find out about | |
705 | * it from an updated osd map. | |
706 | */ | |
707 | while (!list_empty(&osdc->req_lru)) { | |
708 | req = list_entry(osdc->req_lru.next, struct ceph_osd_request, | |
709 | r_req_lru_item); | |
710 | ||
3dd72fc0 | 711 | if (time_before(jiffies, req->r_stamp + timeout)) |
422d2cb8 YS |
712 | break; |
713 | ||
3dd72fc0 | 714 | BUG_ON(req == last_req && req->r_stamp == last_stamp); |
422d2cb8 | 715 | last_req = req; |
3dd72fc0 | 716 | last_stamp = req->r_stamp; |
422d2cb8 YS |
717 | |
718 | osd = req->r_osd; | |
719 | BUG_ON(!osd); | |
720 | pr_warning(" tid %llu timed out on osd%d, will reset osd\n", | |
721 | req->r_tid, osd->o_osd); | |
722 | __kick_requests(osdc, osd); | |
723 | } | |
724 | ||
725 | /* | |
726 | * ping osds that are a bit slow. this ensures that if there | |
727 | * is a break in the TCP connection we will notice, and reopen | |
728 | * a connection with that osd (from the fault callback). | |
729 | */ | |
730 | INIT_LIST_HEAD(&slow_osds); | |
731 | list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { | |
3dd72fc0 | 732 | if (time_before(jiffies, req->r_stamp + keepalive)) |
422d2cb8 YS |
733 | break; |
734 | ||
735 | osd = req->r_osd; | |
736 | BUG_ON(!osd); | |
737 | dout(" tid %llu is slow, will send keepalive on osd%d\n", | |
f24e9980 | 738 | req->r_tid, osd->o_osd); |
422d2cb8 YS |
739 | list_move_tail(&osd->o_keepalive_item, &slow_osds); |
740 | } | |
741 | while (!list_empty(&slow_osds)) { | |
742 | osd = list_entry(slow_osds.next, struct ceph_osd, | |
743 | o_keepalive_item); | |
744 | list_del_init(&osd->o_keepalive_item); | |
f24e9980 SW |
745 | ceph_con_keepalive(&osd->o_con); |
746 | } | |
747 | ||
422d2cb8 | 748 | __schedule_osd_timeout(osdc); |
f24e9980 SW |
749 | mutex_unlock(&osdc->request_mutex); |
750 | ||
751 | up_read(&osdc->map_sem); | |
752 | } | |
753 | ||
f5a2041b YS |
754 | static void handle_osds_timeout(struct work_struct *work) |
755 | { | |
756 | struct ceph_osd_client *osdc = | |
757 | container_of(work, struct ceph_osd_client, | |
758 | osds_timeout_work.work); | |
759 | unsigned long delay = | |
760 | osdc->client->mount_args->osd_idle_ttl * HZ >> 2; | |
761 | ||
762 | dout("osds timeout\n"); | |
763 | down_read(&osdc->map_sem); | |
764 | remove_old_osds(osdc, 0); | |
765 | up_read(&osdc->map_sem); | |
766 | ||
767 | schedule_delayed_work(&osdc->osds_timeout_work, | |
768 | round_jiffies_relative(delay)); | |
769 | } | |
770 | ||
f24e9980 SW |
771 | /* |
772 | * handle osd op reply. either call the callback if it is specified, | |
773 | * or do the completion to wake up the waiting thread. | |
774 | */ | |
350b1c32 SW |
775 | static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, |
776 | struct ceph_connection *con) | |
f24e9980 SW |
777 | { |
778 | struct ceph_osd_reply_head *rhead = msg->front.iov_base; | |
779 | struct ceph_osd_request *req; | |
780 | u64 tid; | |
781 | int numops, object_len, flags; | |
0ceed5db | 782 | s32 result; |
f24e9980 | 783 | |
6df058c0 | 784 | tid = le64_to_cpu(msg->hdr.tid); |
f24e9980 SW |
785 | if (msg->front.iov_len < sizeof(*rhead)) |
786 | goto bad; | |
f24e9980 SW |
787 | numops = le32_to_cpu(rhead->num_ops); |
788 | object_len = le32_to_cpu(rhead->object_len); | |
0ceed5db | 789 | result = le32_to_cpu(rhead->result); |
f24e9980 SW |
790 | if (msg->front.iov_len != sizeof(*rhead) + object_len + |
791 | numops * sizeof(struct ceph_osd_op)) | |
792 | goto bad; | |
0ceed5db | 793 | dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result); |
f24e9980 SW |
794 | |
795 | /* lookup */ | |
796 | mutex_lock(&osdc->request_mutex); | |
797 | req = __lookup_request(osdc, tid); | |
798 | if (req == NULL) { | |
799 | dout("handle_reply tid %llu dne\n", tid); | |
800 | mutex_unlock(&osdc->request_mutex); | |
801 | return; | |
802 | } | |
803 | ceph_osdc_get_request(req); | |
804 | flags = le32_to_cpu(rhead->flags); | |
805 | ||
350b1c32 | 806 | /* |
0d59ab81 | 807 | * if this connection filled our message, drop our reference now, to |
350b1c32 SW |
808 | * avoid a (safe but slower) revoke later. |
809 | */ | |
0d59ab81 | 810 | if (req->r_con_filling_msg == con && req->r_reply == msg) { |
c16e7869 | 811 | dout(" dropping con_filling_msg ref %p\n", con); |
0d59ab81 | 812 | req->r_con_filling_msg = NULL; |
350b1c32 SW |
813 | ceph_con_put(con); |
814 | } | |
815 | ||
f24e9980 SW |
816 | if (!req->r_got_reply) { |
817 | unsigned bytes; | |
818 | ||
819 | req->r_result = le32_to_cpu(rhead->result); | |
820 | bytes = le32_to_cpu(msg->hdr.data_len); | |
821 | dout("handle_reply result %d bytes %d\n", req->r_result, | |
822 | bytes); | |
823 | if (req->r_result == 0) | |
824 | req->r_result = bytes; | |
825 | ||
826 | /* in case this is a write and we need to replay, */ | |
827 | req->r_reassert_version = rhead->reassert_version; | |
828 | ||
829 | req->r_got_reply = 1; | |
830 | } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { | |
831 | dout("handle_reply tid %llu dup ack\n", tid); | |
34b43a56 | 832 | mutex_unlock(&osdc->request_mutex); |
f24e9980 SW |
833 | goto done; |
834 | } | |
835 | ||
836 | dout("handle_reply tid %llu flags %d\n", tid, flags); | |
837 | ||
838 | /* either this is a read, or we got the safe response */ | |
0ceed5db SW |
839 | if (result < 0 || |
840 | (flags & CEPH_OSD_FLAG_ONDISK) || | |
f24e9980 SW |
841 | ((flags & CEPH_OSD_FLAG_WRITE) == 0)) |
842 | __unregister_request(osdc, req); | |
843 | ||
844 | mutex_unlock(&osdc->request_mutex); | |
845 | ||
846 | if (req->r_callback) | |
847 | req->r_callback(req, msg); | |
848 | else | |
849 | complete(&req->r_completion); | |
850 | ||
851 | if (flags & CEPH_OSD_FLAG_ONDISK) { | |
852 | if (req->r_safe_callback) | |
853 | req->r_safe_callback(req, msg); | |
854 | complete(&req->r_safe_completion); /* fsync waiter */ | |
855 | } | |
856 | ||
857 | done: | |
858 | ceph_osdc_put_request(req); | |
859 | return; | |
860 | ||
861 | bad: | |
862 | pr_err("corrupt osd_op_reply got %d %d expected %d\n", | |
863 | (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len), | |
864 | (int)sizeof(*rhead)); | |
9ec7cab1 | 865 | ceph_msg_dump(msg); |
f24e9980 SW |
866 | } |
867 | ||
868 | ||
422d2cb8 | 869 | static int __kick_requests(struct ceph_osd_client *osdc, |
f24e9980 SW |
870 | struct ceph_osd *kickosd) |
871 | { | |
872 | struct ceph_osd_request *req; | |
873 | struct rb_node *p, *n; | |
874 | int needmap = 0; | |
875 | int err; | |
876 | ||
877 | dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1); | |
153a008b | 878 | if (kickosd) { |
87b315a5 SW |
879 | err = __reset_osd(osdc, kickosd); |
880 | if (err == -EAGAIN) | |
881 | return 1; | |
153a008b | 882 | } else { |
f24e9980 SW |
883 | for (p = rb_first(&osdc->osds); p; p = n) { |
884 | struct ceph_osd *osd = | |
885 | rb_entry(p, struct ceph_osd, o_node); | |
886 | ||
887 | n = rb_next(p); | |
888 | if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || | |
103e2d3a SW |
889 | memcmp(&osd->o_con.peer_addr, |
890 | ceph_osd_addr(osdc->osdmap, | |
891 | osd->o_osd), | |
892 | sizeof(struct ceph_entity_addr)) != 0) | |
f5a2041b | 893 | __reset_osd(osdc, osd); |
f24e9980 SW |
894 | } |
895 | } | |
896 | ||
897 | for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { | |
898 | req = rb_entry(p, struct ceph_osd_request, r_node); | |
899 | ||
900 | if (req->r_resend) { | |
901 | dout(" r_resend set on tid %llu\n", req->r_tid); | |
266673db | 902 | __cancel_request(req); |
f24e9980 SW |
903 | goto kick; |
904 | } | |
266673db SW |
905 | if (req->r_osd && kickosd == req->r_osd) { |
906 | __cancel_request(req); | |
f24e9980 | 907 | goto kick; |
266673db | 908 | } |
f24e9980 SW |
909 | |
910 | err = __map_osds(osdc, req); | |
911 | if (err == 0) | |
912 | continue; /* no change */ | |
913 | if (err < 0) { | |
914 | /* | |
915 | * FIXME: really, we should set the request | |
916 | * error and fail if this isn't a 'nofail' | |
917 | * request, but that's a fair bit more | |
918 | * complicated to do. So retry! | |
919 | */ | |
920 | dout(" setting r_resend on %llu\n", req->r_tid); | |
921 | req->r_resend = true; | |
922 | continue; | |
923 | } | |
924 | if (req->r_osd == NULL) { | |
925 | dout("tid %llu maps to no valid osd\n", req->r_tid); | |
926 | needmap++; /* request a newer map */ | |
927 | continue; | |
928 | } | |
929 | ||
930 | kick: | |
c1ea8823 | 931 | dout("kicking %p tid %llu osd%d\n", req, req->r_tid, |
12eadc19 | 932 | req->r_osd ? req->r_osd->o_osd : -1); |
f24e9980 SW |
933 | req->r_flags |= CEPH_OSD_FLAG_RETRY; |
934 | err = __send_request(osdc, req); | |
935 | if (err) { | |
936 | dout(" setting r_resend on %llu\n", req->r_tid); | |
937 | req->r_resend = true; | |
938 | } | |
939 | } | |
422d2cb8 YS |
940 | |
941 | return needmap; | |
942 | } | |
943 | ||
944 | /* | |
945 | * Resubmit osd requests whose osd or osd address has changed. Request | |
946 | * a new osd map if osds are down, or we are otherwise unable to determine | |
947 | * how to direct a request. | |
948 | * | |
949 | * Close connections to down osds. | |
950 | * | |
951 | * If @who is specified, resubmit requests for that specific osd. | |
952 | * | |
953 | * Caller should hold map_sem for read and request_mutex. | |
954 | */ | |
955 | static void kick_requests(struct ceph_osd_client *osdc, | |
956 | struct ceph_osd *kickosd) | |
957 | { | |
958 | int needmap; | |
959 | ||
960 | mutex_lock(&osdc->request_mutex); | |
961 | needmap = __kick_requests(osdc, kickosd); | |
f24e9980 SW |
962 | mutex_unlock(&osdc->request_mutex); |
963 | ||
964 | if (needmap) { | |
965 | dout("%d requests for down osds, need new map\n", needmap); | |
966 | ceph_monc_request_next_osdmap(&osdc->client->monc); | |
967 | } | |
f24e9980 | 968 | |
422d2cb8 | 969 | } |
f24e9980 SW |
970 | /* |
971 | * Process updated osd map. | |
972 | * | |
973 | * The message contains any number of incremental and full maps, normally | |
974 | * indicating some sort of topology change in the cluster. Kick requests | |
975 | * off to different OSDs as needed. | |
976 | */ | |
977 | void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) | |
978 | { | |
979 | void *p, *end, *next; | |
980 | u32 nr_maps, maplen; | |
981 | u32 epoch; | |
982 | struct ceph_osdmap *newmap = NULL, *oldmap; | |
983 | int err; | |
984 | struct ceph_fsid fsid; | |
985 | ||
986 | dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); | |
987 | p = msg->front.iov_base; | |
988 | end = p + msg->front.iov_len; | |
989 | ||
990 | /* verify fsid */ | |
991 | ceph_decode_need(&p, end, sizeof(fsid), bad); | |
992 | ceph_decode_copy(&p, &fsid, sizeof(fsid)); | |
0743304d SW |
993 | if (ceph_check_fsid(osdc->client, &fsid) < 0) |
994 | return; | |
f24e9980 SW |
995 | |
996 | down_write(&osdc->map_sem); | |
997 | ||
998 | /* incremental maps */ | |
999 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1000 | dout(" %d inc maps\n", nr_maps); | |
1001 | while (nr_maps > 0) { | |
1002 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1003 | epoch = ceph_decode_32(&p); |
1004 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1005 | ceph_decode_need(&p, end, maplen, bad); |
1006 | next = p + maplen; | |
1007 | if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { | |
1008 | dout("applying incremental map %u len %d\n", | |
1009 | epoch, maplen); | |
1010 | newmap = osdmap_apply_incremental(&p, next, | |
1011 | osdc->osdmap, | |
1012 | osdc->client->msgr); | |
1013 | if (IS_ERR(newmap)) { | |
1014 | err = PTR_ERR(newmap); | |
1015 | goto bad; | |
1016 | } | |
30dc6381 | 1017 | BUG_ON(!newmap); |
f24e9980 SW |
1018 | if (newmap != osdc->osdmap) { |
1019 | ceph_osdmap_destroy(osdc->osdmap); | |
1020 | osdc->osdmap = newmap; | |
1021 | } | |
1022 | } else { | |
1023 | dout("ignoring incremental map %u len %d\n", | |
1024 | epoch, maplen); | |
1025 | } | |
1026 | p = next; | |
1027 | nr_maps--; | |
1028 | } | |
1029 | if (newmap) | |
1030 | goto done; | |
1031 | ||
1032 | /* full maps */ | |
1033 | ceph_decode_32_safe(&p, end, nr_maps, bad); | |
1034 | dout(" %d full maps\n", nr_maps); | |
1035 | while (nr_maps) { | |
1036 | ceph_decode_need(&p, end, 2*sizeof(u32), bad); | |
c89136ea SW |
1037 | epoch = ceph_decode_32(&p); |
1038 | maplen = ceph_decode_32(&p); | |
f24e9980 SW |
1039 | ceph_decode_need(&p, end, maplen, bad); |
1040 | if (nr_maps > 1) { | |
1041 | dout("skipping non-latest full map %u len %d\n", | |
1042 | epoch, maplen); | |
1043 | } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { | |
1044 | dout("skipping full map %u len %d, " | |
1045 | "older than our %u\n", epoch, maplen, | |
1046 | osdc->osdmap->epoch); | |
1047 | } else { | |
1048 | dout("taking full map %u len %d\n", epoch, maplen); | |
1049 | newmap = osdmap_decode(&p, p+maplen); | |
1050 | if (IS_ERR(newmap)) { | |
1051 | err = PTR_ERR(newmap); | |
1052 | goto bad; | |
1053 | } | |
30dc6381 | 1054 | BUG_ON(!newmap); |
f24e9980 SW |
1055 | oldmap = osdc->osdmap; |
1056 | osdc->osdmap = newmap; | |
1057 | if (oldmap) | |
1058 | ceph_osdmap_destroy(oldmap); | |
1059 | } | |
1060 | p += maplen; | |
1061 | nr_maps--; | |
1062 | } | |
1063 | ||
1064 | done: | |
1065 | downgrade_write(&osdc->map_sem); | |
1066 | ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); | |
1067 | if (newmap) | |
1068 | kick_requests(osdc, NULL); | |
1069 | up_read(&osdc->map_sem); | |
1070 | return; | |
1071 | ||
1072 | bad: | |
1073 | pr_err("osdc handle_map corrupt msg\n"); | |
9ec7cab1 | 1074 | ceph_msg_dump(msg); |
f24e9980 SW |
1075 | up_write(&osdc->map_sem); |
1076 | return; | |
1077 | } | |
1078 | ||
1079 | ||
1080 | /* | |
1081 | * A read request prepares specific pages that data is to be read into. | |
1082 | * When a message is being read off the wire, we call prepare_pages to | |
1083 | * find those pages. | |
1084 | * 0 = success, -1 failure. | |
1085 | */ | |
0d59ab81 | 1086 | static int __prepare_pages(struct ceph_connection *con, |
0547a9b3 YS |
1087 | struct ceph_msg_header *hdr, |
1088 | struct ceph_osd_request *req, | |
1089 | u64 tid, | |
1090 | struct ceph_msg *m) | |
f24e9980 SW |
1091 | { |
1092 | struct ceph_osd *osd = con->private; | |
1093 | struct ceph_osd_client *osdc; | |
f24e9980 | 1094 | int ret = -1; |
0547a9b3 YS |
1095 | int data_len = le32_to_cpu(hdr->data_len); |
1096 | unsigned data_off = le16_to_cpu(hdr->data_off); | |
1097 | ||
1098 | int want = calc_pages_for(data_off & ~PAGE_MASK, data_len); | |
f24e9980 SW |
1099 | |
1100 | if (!osd) | |
1101 | return -1; | |
0547a9b3 | 1102 | |
f24e9980 SW |
1103 | osdc = osd->o_osdc; |
1104 | ||
0d59ab81 | 1105 | dout("__prepare_pages on msg %p tid %llu, has %d pages, want %d\n", m, |
f24e9980 | 1106 | tid, req->r_num_pages, want); |
350b1c32 SW |
1107 | if (unlikely(req->r_num_pages < want)) |
1108 | goto out; | |
350b1c32 SW |
1109 | m->pages = req->r_pages; |
1110 | m->nr_pages = req->r_num_pages; | |
1111 | ret = 0; /* success */ | |
f24e9980 | 1112 | out: |
0547a9b3 YS |
1113 | BUG_ON(ret < 0 || m->nr_pages < want); |
1114 | ||
f24e9980 SW |
1115 | return ret; |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * Register request, send initial attempt. | |
1120 | */ | |
1121 | int ceph_osdc_start_request(struct ceph_osd_client *osdc, | |
1122 | struct ceph_osd_request *req, | |
1123 | bool nofail) | |
1124 | { | |
c1ea8823 | 1125 | int rc = 0; |
f24e9980 SW |
1126 | |
1127 | req->r_request->pages = req->r_pages; | |
1128 | req->r_request->nr_pages = req->r_num_pages; | |
1129 | ||
1130 | register_request(osdc, req); | |
1131 | ||
1132 | down_read(&osdc->map_sem); | |
1133 | mutex_lock(&osdc->request_mutex); | |
c1ea8823 SW |
1134 | /* |
1135 | * a racing kick_requests() may have sent the message for us | |
1136 | * while we dropped request_mutex above, so only send now if | |
1137 | * the request still han't been touched yet. | |
1138 | */ | |
1139 | if (req->r_sent == 0) { | |
1140 | rc = __send_request(osdc, req); | |
1141 | if (rc) { | |
1142 | if (nofail) { | |
1143 | dout("osdc_start_request failed send, " | |
1144 | " marking %lld\n", req->r_tid); | |
1145 | req->r_resend = true; | |
1146 | rc = 0; | |
1147 | } else { | |
1148 | __unregister_request(osdc, req); | |
1149 | } | |
f24e9980 SW |
1150 | } |
1151 | } | |
1152 | mutex_unlock(&osdc->request_mutex); | |
1153 | up_read(&osdc->map_sem); | |
1154 | return rc; | |
1155 | } | |
1156 | ||
1157 | /* | |
1158 | * wait for a request to complete | |
1159 | */ | |
1160 | int ceph_osdc_wait_request(struct ceph_osd_client *osdc, | |
1161 | struct ceph_osd_request *req) | |
1162 | { | |
1163 | int rc; | |
1164 | ||
1165 | rc = wait_for_completion_interruptible(&req->r_completion); | |
1166 | if (rc < 0) { | |
1167 | mutex_lock(&osdc->request_mutex); | |
1168 | __cancel_request(req); | |
529cfcc4 | 1169 | __unregister_request(osdc, req); |
f24e9980 | 1170 | mutex_unlock(&osdc->request_mutex); |
529cfcc4 | 1171 | dout("wait_request tid %llu canceled/timed out\n", req->r_tid); |
f24e9980 SW |
1172 | return rc; |
1173 | } | |
1174 | ||
1175 | dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result); | |
1176 | return req->r_result; | |
1177 | } | |
1178 | ||
1179 | /* | |
1180 | * sync - wait for all in-flight requests to flush. avoid starvation. | |
1181 | */ | |
1182 | void ceph_osdc_sync(struct ceph_osd_client *osdc) | |
1183 | { | |
1184 | struct ceph_osd_request *req; | |
1185 | u64 last_tid, next_tid = 0; | |
1186 | ||
1187 | mutex_lock(&osdc->request_mutex); | |
1188 | last_tid = osdc->last_tid; | |
1189 | while (1) { | |
1190 | req = __lookup_request_ge(osdc, next_tid); | |
1191 | if (!req) | |
1192 | break; | |
1193 | if (req->r_tid > last_tid) | |
1194 | break; | |
1195 | ||
1196 | next_tid = req->r_tid + 1; | |
1197 | if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) | |
1198 | continue; | |
1199 | ||
1200 | ceph_osdc_get_request(req); | |
1201 | mutex_unlock(&osdc->request_mutex); | |
1202 | dout("sync waiting on tid %llu (last is %llu)\n", | |
1203 | req->r_tid, last_tid); | |
1204 | wait_for_completion(&req->r_safe_completion); | |
1205 | mutex_lock(&osdc->request_mutex); | |
1206 | ceph_osdc_put_request(req); | |
1207 | } | |
1208 | mutex_unlock(&osdc->request_mutex); | |
1209 | dout("sync done (thru tid %llu)\n", last_tid); | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * init, shutdown | |
1214 | */ | |
1215 | int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) | |
1216 | { | |
1217 | int err; | |
1218 | ||
1219 | dout("init\n"); | |
1220 | osdc->client = client; | |
1221 | osdc->osdmap = NULL; | |
1222 | init_rwsem(&osdc->map_sem); | |
1223 | init_completion(&osdc->map_waiters); | |
1224 | osdc->last_requested_map = 0; | |
1225 | mutex_init(&osdc->request_mutex); | |
f24e9980 SW |
1226 | osdc->last_tid = 0; |
1227 | osdc->osds = RB_ROOT; | |
f5a2041b | 1228 | INIT_LIST_HEAD(&osdc->osd_lru); |
f24e9980 | 1229 | osdc->requests = RB_ROOT; |
422d2cb8 | 1230 | INIT_LIST_HEAD(&osdc->req_lru); |
f24e9980 SW |
1231 | osdc->num_requests = 0; |
1232 | INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); | |
f5a2041b YS |
1233 | INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); |
1234 | ||
1235 | schedule_delayed_work(&osdc->osds_timeout_work, | |
1236 | round_jiffies_relative(osdc->client->mount_args->osd_idle_ttl * HZ)); | |
f24e9980 | 1237 | |
5f44f142 | 1238 | err = -ENOMEM; |
f24e9980 SW |
1239 | osdc->req_mempool = mempool_create_kmalloc_pool(10, |
1240 | sizeof(struct ceph_osd_request)); | |
1241 | if (!osdc->req_mempool) | |
5f44f142 | 1242 | goto out; |
f24e9980 | 1243 | |
c16e7869 | 1244 | err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true); |
f24e9980 | 1245 | if (err < 0) |
5f44f142 | 1246 | goto out_mempool; |
c16e7869 SW |
1247 | err = ceph_msgpool_init(&osdc->msgpool_op_reply, |
1248 | OSD_OPREPLY_FRONT_LEN, 10, true); | |
1249 | if (err < 0) | |
1250 | goto out_msgpool; | |
f24e9980 | 1251 | return 0; |
5f44f142 | 1252 | |
c16e7869 SW |
1253 | out_msgpool: |
1254 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
5f44f142 SW |
1255 | out_mempool: |
1256 | mempool_destroy(osdc->req_mempool); | |
1257 | out: | |
1258 | return err; | |
f24e9980 SW |
1259 | } |
1260 | ||
1261 | void ceph_osdc_stop(struct ceph_osd_client *osdc) | |
1262 | { | |
1263 | cancel_delayed_work_sync(&osdc->timeout_work); | |
f5a2041b | 1264 | cancel_delayed_work_sync(&osdc->osds_timeout_work); |
f24e9980 SW |
1265 | if (osdc->osdmap) { |
1266 | ceph_osdmap_destroy(osdc->osdmap); | |
1267 | osdc->osdmap = NULL; | |
1268 | } | |
f5a2041b | 1269 | remove_old_osds(osdc, 1); |
f24e9980 SW |
1270 | mempool_destroy(osdc->req_mempool); |
1271 | ceph_msgpool_destroy(&osdc->msgpool_op); | |
c16e7869 | 1272 | ceph_msgpool_destroy(&osdc->msgpool_op_reply); |
f24e9980 SW |
1273 | } |
1274 | ||
1275 | /* | |
1276 | * Read some contiguous pages. If we cross a stripe boundary, shorten | |
1277 | * *plen. Return number of bytes read, or error. | |
1278 | */ | |
1279 | int ceph_osdc_readpages(struct ceph_osd_client *osdc, | |
1280 | struct ceph_vino vino, struct ceph_file_layout *layout, | |
1281 | u64 off, u64 *plen, | |
1282 | u32 truncate_seq, u64 truncate_size, | |
1283 | struct page **pages, int num_pages) | |
1284 | { | |
1285 | struct ceph_osd_request *req; | |
1286 | int rc = 0; | |
1287 | ||
1288 | dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, | |
1289 | vino.snap, off, *plen); | |
1290 | req = ceph_osdc_new_request(osdc, layout, vino, off, plen, | |
1291 | CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, | |
1292 | NULL, 0, truncate_seq, truncate_size, NULL, | |
1293 | false, 1); | |
1294 | if (IS_ERR(req)) | |
1295 | return PTR_ERR(req); | |
1296 | ||
1297 | /* it may be a short read due to an object boundary */ | |
1298 | req->r_pages = pages; | |
1299 | num_pages = calc_pages_for(off, *plen); | |
1300 | req->r_num_pages = num_pages; | |
1301 | ||
1302 | dout("readpages final extent is %llu~%llu (%d pages)\n", | |
1303 | off, *plen, req->r_num_pages); | |
1304 | ||
1305 | rc = ceph_osdc_start_request(osdc, req, false); | |
1306 | if (!rc) | |
1307 | rc = ceph_osdc_wait_request(osdc, req); | |
1308 | ||
1309 | ceph_osdc_put_request(req); | |
1310 | dout("readpages result %d\n", rc); | |
1311 | return rc; | |
1312 | } | |
1313 | ||
1314 | /* | |
1315 | * do a synchronous write on N pages | |
1316 | */ | |
1317 | int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, | |
1318 | struct ceph_file_layout *layout, | |
1319 | struct ceph_snap_context *snapc, | |
1320 | u64 off, u64 len, | |
1321 | u32 truncate_seq, u64 truncate_size, | |
1322 | struct timespec *mtime, | |
1323 | struct page **pages, int num_pages, | |
1324 | int flags, int do_sync, bool nofail) | |
1325 | { | |
1326 | struct ceph_osd_request *req; | |
1327 | int rc = 0; | |
1328 | ||
1329 | BUG_ON(vino.snap != CEPH_NOSNAP); | |
1330 | req = ceph_osdc_new_request(osdc, layout, vino, off, &len, | |
1331 | CEPH_OSD_OP_WRITE, | |
1332 | flags | CEPH_OSD_FLAG_ONDISK | | |
1333 | CEPH_OSD_FLAG_WRITE, | |
1334 | snapc, do_sync, | |
1335 | truncate_seq, truncate_size, mtime, | |
1336 | nofail, 1); | |
1337 | if (IS_ERR(req)) | |
1338 | return PTR_ERR(req); | |
1339 | ||
1340 | /* it may be a short write due to an object boundary */ | |
1341 | req->r_pages = pages; | |
1342 | req->r_num_pages = calc_pages_for(off, len); | |
1343 | dout("writepages %llu~%llu (%d pages)\n", off, len, | |
1344 | req->r_num_pages); | |
1345 | ||
1346 | rc = ceph_osdc_start_request(osdc, req, nofail); | |
1347 | if (!rc) | |
1348 | rc = ceph_osdc_wait_request(osdc, req); | |
1349 | ||
1350 | ceph_osdc_put_request(req); | |
1351 | if (rc == 0) | |
1352 | rc = len; | |
1353 | dout("writepages result %d\n", rc); | |
1354 | return rc; | |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * handle incoming message | |
1359 | */ | |
1360 | static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) | |
1361 | { | |
1362 | struct ceph_osd *osd = con->private; | |
32c895e7 | 1363 | struct ceph_osd_client *osdc; |
f24e9980 SW |
1364 | int type = le16_to_cpu(msg->hdr.type); |
1365 | ||
1366 | if (!osd) | |
1367 | return; | |
32c895e7 | 1368 | osdc = osd->o_osdc; |
f24e9980 SW |
1369 | |
1370 | switch (type) { | |
1371 | case CEPH_MSG_OSD_MAP: | |
1372 | ceph_osdc_handle_map(osdc, msg); | |
1373 | break; | |
1374 | case CEPH_MSG_OSD_OPREPLY: | |
350b1c32 | 1375 | handle_reply(osdc, msg, con); |
f24e9980 SW |
1376 | break; |
1377 | ||
1378 | default: | |
1379 | pr_err("received unknown message type %d %s\n", type, | |
1380 | ceph_msg_type_name(type)); | |
1381 | } | |
1382 | ceph_msg_put(msg); | |
1383 | } | |
1384 | ||
5b3a4db3 SW |
1385 | /* |
1386 | * lookup and return message for incoming reply | |
1387 | */ | |
1388 | static struct ceph_msg *get_reply(struct ceph_connection *con, | |
2450418c YS |
1389 | struct ceph_msg_header *hdr, |
1390 | int *skip) | |
f24e9980 SW |
1391 | { |
1392 | struct ceph_osd *osd = con->private; | |
1393 | struct ceph_osd_client *osdc = osd->o_osdc; | |
2450418c | 1394 | struct ceph_msg *m; |
0547a9b3 | 1395 | struct ceph_osd_request *req; |
5b3a4db3 SW |
1396 | int front = le32_to_cpu(hdr->front_len); |
1397 | int data_len = le32_to_cpu(hdr->data_len); | |
0547a9b3 YS |
1398 | u64 tid; |
1399 | int err; | |
f24e9980 | 1400 | |
0547a9b3 YS |
1401 | tid = le64_to_cpu(hdr->tid); |
1402 | mutex_lock(&osdc->request_mutex); | |
1403 | req = __lookup_request(osdc, tid); | |
1404 | if (!req) { | |
1405 | *skip = 1; | |
1406 | m = NULL; | |
c16e7869 | 1407 | pr_info("get_reply unknown tid %llu from osd%d\n", tid, |
5b3a4db3 | 1408 | osd->o_osd); |
0547a9b3 YS |
1409 | goto out; |
1410 | } | |
c16e7869 SW |
1411 | |
1412 | if (req->r_con_filling_msg) { | |
1413 | dout("get_reply revoking msg %p from old con %p\n", | |
1414 | req->r_reply, req->r_con_filling_msg); | |
1415 | ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply); | |
1416 | ceph_con_put(req->r_con_filling_msg); | |
0547a9b3 YS |
1417 | } |
1418 | ||
c16e7869 SW |
1419 | if (front > req->r_reply->front.iov_len) { |
1420 | pr_warning("get_reply front %d > preallocated %d\n", | |
1421 | front, (int)req->r_reply->front.iov_len); | |
1422 | m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, 0, 0, NULL); | |
1423 | if (IS_ERR(m)) | |
1424 | goto out; | |
1425 | ceph_msg_put(req->r_reply); | |
1426 | req->r_reply = m; | |
1427 | } | |
1428 | m = ceph_msg_get(req->r_reply); | |
1429 | ||
0547a9b3 | 1430 | if (data_len > 0) { |
0d59ab81 | 1431 | err = __prepare_pages(con, hdr, req, tid, m); |
0547a9b3 YS |
1432 | if (err < 0) { |
1433 | *skip = 1; | |
1434 | ceph_msg_put(m); | |
1435 | m = ERR_PTR(err); | |
1436 | } | |
1437 | } | |
5b3a4db3 | 1438 | *skip = 0; |
c16e7869 SW |
1439 | req->r_con_filling_msg = ceph_con_get(con); |
1440 | dout("get_reply tid %lld %p\n", tid, m); | |
0547a9b3 YS |
1441 | |
1442 | out: | |
1443 | mutex_unlock(&osdc->request_mutex); | |
2450418c | 1444 | return m; |
5b3a4db3 SW |
1445 | |
1446 | } | |
1447 | ||
1448 | static struct ceph_msg *alloc_msg(struct ceph_connection *con, | |
1449 | struct ceph_msg_header *hdr, | |
1450 | int *skip) | |
1451 | { | |
1452 | struct ceph_osd *osd = con->private; | |
1453 | int type = le16_to_cpu(hdr->type); | |
1454 | int front = le32_to_cpu(hdr->front_len); | |
1455 | ||
1456 | switch (type) { | |
1457 | case CEPH_MSG_OSD_MAP: | |
1458 | return ceph_msg_new(type, front, 0, 0, NULL); | |
1459 | case CEPH_MSG_OSD_OPREPLY: | |
1460 | return get_reply(con, hdr, skip); | |
1461 | default: | |
1462 | pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, | |
1463 | osd->o_osd); | |
1464 | *skip = 1; | |
1465 | return NULL; | |
1466 | } | |
f24e9980 SW |
1467 | } |
1468 | ||
1469 | /* | |
1470 | * Wrappers to refcount containing ceph_osd struct | |
1471 | */ | |
1472 | static struct ceph_connection *get_osd_con(struct ceph_connection *con) | |
1473 | { | |
1474 | struct ceph_osd *osd = con->private; | |
1475 | if (get_osd(osd)) | |
1476 | return con; | |
1477 | return NULL; | |
1478 | } | |
1479 | ||
1480 | static void put_osd_con(struct ceph_connection *con) | |
1481 | { | |
1482 | struct ceph_osd *osd = con->private; | |
1483 | put_osd(osd); | |
1484 | } | |
1485 | ||
4e7a5dcd SW |
1486 | /* |
1487 | * authentication | |
1488 | */ | |
1489 | static int get_authorizer(struct ceph_connection *con, | |
50b885b9 SW |
1490 | void **buf, int *len, int *proto, |
1491 | void **reply_buf, int *reply_len, int force_new) | |
4e7a5dcd SW |
1492 | { |
1493 | struct ceph_osd *o = con->private; | |
1494 | struct ceph_osd_client *osdc = o->o_osdc; | |
1495 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1496 | int ret = 0; | |
1497 | ||
1498 | if (force_new && o->o_authorizer) { | |
1499 | ac->ops->destroy_authorizer(ac, o->o_authorizer); | |
1500 | o->o_authorizer = NULL; | |
1501 | } | |
1502 | if (o->o_authorizer == NULL) { | |
1503 | ret = ac->ops->create_authorizer( | |
1504 | ac, CEPH_ENTITY_TYPE_OSD, | |
1505 | &o->o_authorizer, | |
1506 | &o->o_authorizer_buf, | |
1507 | &o->o_authorizer_buf_len, | |
1508 | &o->o_authorizer_reply_buf, | |
1509 | &o->o_authorizer_reply_buf_len); | |
1510 | if (ret) | |
1511 | return ret; | |
1512 | } | |
1513 | ||
1514 | *proto = ac->protocol; | |
1515 | *buf = o->o_authorizer_buf; | |
1516 | *len = o->o_authorizer_buf_len; | |
1517 | *reply_buf = o->o_authorizer_reply_buf; | |
1518 | *reply_len = o->o_authorizer_reply_buf_len; | |
1519 | return 0; | |
1520 | } | |
1521 | ||
1522 | ||
1523 | static int verify_authorizer_reply(struct ceph_connection *con, int len) | |
1524 | { | |
1525 | struct ceph_osd *o = con->private; | |
1526 | struct ceph_osd_client *osdc = o->o_osdc; | |
1527 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1528 | ||
1529 | return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len); | |
1530 | } | |
1531 | ||
9bd2e6f8 SW |
1532 | static int invalidate_authorizer(struct ceph_connection *con) |
1533 | { | |
1534 | struct ceph_osd *o = con->private; | |
1535 | struct ceph_osd_client *osdc = o->o_osdc; | |
1536 | struct ceph_auth_client *ac = osdc->client->monc.auth; | |
1537 | ||
1538 | if (ac->ops->invalidate_authorizer) | |
1539 | ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); | |
1540 | ||
1541 | return ceph_monc_validate_auth(&osdc->client->monc); | |
1542 | } | |
4e7a5dcd | 1543 | |
f24e9980 SW |
1544 | const static struct ceph_connection_operations osd_con_ops = { |
1545 | .get = get_osd_con, | |
1546 | .put = put_osd_con, | |
1547 | .dispatch = dispatch, | |
4e7a5dcd SW |
1548 | .get_authorizer = get_authorizer, |
1549 | .verify_authorizer_reply = verify_authorizer_reply, | |
9bd2e6f8 | 1550 | .invalidate_authorizer = invalidate_authorizer, |
f24e9980 | 1551 | .alloc_msg = alloc_msg, |
81b024e7 | 1552 | .fault = osd_reset, |
f24e9980 | 1553 | }; |