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-rw-r--r--fs/ceph/osd_client.c1550
1 files changed, 1550 insertions, 0 deletions
diff --git a/fs/ceph/osd_client.c b/fs/ceph/osd_client.c
new file mode 100644
index 000000000000..c7b4dedaace6
--- /dev/null
+++ b/fs/ceph/osd_client.c
@@ -0,0 +1,1550 @@
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"
14#include "auth.h"
15
16#define OSD_OP_FRONT_LEN 4096
17#define OSD_OPREPLY_FRONT_LEN 512
18
19const static struct ceph_connection_operations osd_con_ops;
20static int __kick_requests(struct ceph_osd_client *osdc,
21 struct ceph_osd *kickosd);
22
23static 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 */
50static 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
81/*
82 * requests
83 */
84void ceph_osdc_release_request(struct kref *kref)
85{
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);
94 if (req->r_con_filling_msg) {
95 dout("release_request revoking pages %p from con %p\n",
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);
100 }
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);
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 */
122struct 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;
139 int num_op = 1 + do_sync;
140 size_t msg_size = sizeof(*head) + num_op*sizeof(*op);
141 int i;
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
152 req->r_osdc = osdc;
153 req->r_mempool = use_mempool;
154 kref_init(&req->r_kref);
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
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 */
175 msg_size += 40;
176 if (snapc)
177 msg_size += sizeof(u64) * snapc->num_snaps;
178 if (use_mempool)
179 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
180 else
181 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, 0, 0, NULL);
182 if (IS_ERR(msg)) {
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 }
211 op->extent.truncate_size = cpu_to_le64(truncate_size);
212 op->extent.truncate_seq = cpu_to_le32(truncate_seq);
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
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);
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);
236 return req;
237}
238
239/*
240 * We keep osd requests in an rbtree, sorted by ->r_tid.
241 */
242static 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
264static 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
282static 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/*
306 * If the osd connection drops, we need to resubmit all requests.
307 */
308static 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;
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 */
325static 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 INIT_LIST_HEAD(&osd->o_osd_lru);
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;
343
344 INIT_LIST_HEAD(&osd->o_keepalive_item);
345 return osd;
346}
347
348static 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
360static 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);
364 if (atomic_dec_and_test(&osd->o_ref))
365 kfree(osd);
366}
367
368/*
369 * remove an osd from our map
370 */
371static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
372{
373 dout("__remove_osd %p\n", osd);
374 BUG_ON(!list_empty(&osd->o_requests));
375 rb_erase(&osd->o_node, &osdc->osds);
376 list_del_init(&osd->o_osd_lru);
377 ceph_con_close(&osd->o_con);
378 put_osd(osd);
379}
380
381static 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
390static 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
397static 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
411/*
412 * reset osd connect
413 */
414static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
415{
416 struct ceph_osd_request *req;
417 int ret = 0;
418
419 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
420 if (list_empty(&osd->o_requests)) {
421 __remove_osd(osdc, osd);
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;
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
440static 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
461static 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
478static 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
484static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
485{
486 cancel_delayed_work(&osdc->timeout_work);
487}
488
489/*
490 * Register request, assign tid. If this is the first request, set up
491 * the timeout event.
492 */
493static void register_request(struct ceph_osd_client *osdc,
494 struct ceph_osd_request *req)
495{
496 mutex_lock(&osdc->request_mutex);
497 req->r_tid = ++osdc->last_tid;
498 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
499 INIT_LIST_HEAD(&req->r_req_lru_item);
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
506 if (osdc->num_requests == 1) {
507 dout(" first request, scheduling timeout\n");
508 __schedule_osd_timeout(osdc);
509 }
510 mutex_unlock(&osdc->request_mutex);
511}
512
513/*
514 * called under osdc->request_mutex
515 */
516static 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
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))
529 __move_osd_to_lru(osdc, req->r_osd);
530 req->r_osd = NULL;
531 }
532
533 ceph_osdc_put_request(req);
534
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);
539 }
540}
541
542/*
543 * Cancel a previously queued request message
544 */
545static 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 }
551 list_del_init(&req->r_req_lru_item);
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 */
563static 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;
567 struct ceph_pg pgid;
568 int o = -1;
569 int err;
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;
576 pgid = reqhead->layout.ol_pgid;
577 req->r_pgid = pgid;
578
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
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,
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);
593 req->r_osd = NULL;
594 }
595
596 req->r_osd = __lookup_osd(osdc, o);
597 if (!req->r_osd && o >= 0) {
598 err = -ENOMEM;
599 req->r_osd = create_osd(osdc);
600 if (!req->r_osd)
601 goto out;
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
611 if (req->r_osd) {
612 __remove_osd_from_lru(req->r_osd);
613 list_add(&req->r_osd_item, &req->r_osd->o_requests);
614 }
615 err = 1; /* osd changed */
616
617out:
618 return err;
619}
620
621/*
622 * caller should hold map_sem (for read) and request_mutex
623 */
624static 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
647 req->r_stamp = jiffies;
648 list_move_tail(&osdc->req_lru, &req->r_req_lru_item);
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 */
665static 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);
669 struct ceph_osd_request *req, *last_req = NULL;
670 struct ceph_osd *osd;
671 unsigned long timeout = osdc->client->mount_args->osd_timeout * HZ;
672 unsigned long keepalive =
673 osdc->client->mount_args->osd_keepalive_timeout * HZ;
674 unsigned long last_stamp = 0;
675 struct rb_node *p;
676 struct list_head slow_osds;
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 }
699
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
711 if (time_before(jiffies, req->r_stamp + timeout))
712 break;
713
714 BUG_ON(req == last_req && req->r_stamp == last_stamp);
715 last_req = req;
716 last_stamp = req->r_stamp;
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) {
732 if (time_before(jiffies, req->r_stamp + keepalive))
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",
738 req->r_tid, osd->o_osd);
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);
745 ceph_con_keepalive(&osd->o_con);
746 }
747
748 __schedule_osd_timeout(osdc);
749 mutex_unlock(&osdc->request_mutex);
750
751 up_read(&osdc->map_sem);
752}
753
754static 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
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 */
775static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
776 struct ceph_connection *con)
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;
782
783 tid = le64_to_cpu(msg->hdr.tid);
784 if (msg->front.iov_len < sizeof(*rhead))
785 goto bad;
786 numops = le32_to_cpu(rhead->num_ops);
787 object_len = le32_to_cpu(rhead->object_len);
788 if (msg->front.iov_len != sizeof(*rhead) + object_len +
789 numops * sizeof(struct ceph_osd_op))
790 goto bad;
791 dout("handle_reply %p tid %llu\n", msg, tid);
792
793 /* lookup */
794 mutex_lock(&osdc->request_mutex);
795 req = __lookup_request(osdc, tid);
796 if (req == NULL) {
797 dout("handle_reply tid %llu dne\n", tid);
798 mutex_unlock(&osdc->request_mutex);
799 return;
800 }
801 ceph_osdc_get_request(req);
802 flags = le32_to_cpu(rhead->flags);
803
804 /*
805 * if this connection filled our message, drop our reference now, to
806 * avoid a (safe but slower) revoke later.
807 */
808 if (req->r_con_filling_msg == con && req->r_reply == msg) {
809 dout(" dropping con_filling_msg ref %p\n", con);
810 req->r_con_filling_msg = NULL;
811 ceph_con_put(con);
812 }
813
814 if (!req->r_got_reply) {
815 unsigned bytes;
816
817 req->r_result = le32_to_cpu(rhead->result);
818 bytes = le32_to_cpu(msg->hdr.data_len);
819 dout("handle_reply result %d bytes %d\n", req->r_result,
820 bytes);
821 if (req->r_result == 0)
822 req->r_result = bytes;
823
824 /* in case this is a write and we need to replay, */
825 req->r_reassert_version = rhead->reassert_version;
826
827 req->r_got_reply = 1;
828 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
829 dout("handle_reply tid %llu dup ack\n", tid);
830 mutex_unlock(&osdc->request_mutex);
831 goto done;
832 }
833
834 dout("handle_reply tid %llu flags %d\n", tid, flags);
835
836 /* either this is a read, or we got the safe response */
837 if ((flags & CEPH_OSD_FLAG_ONDISK) ||
838 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
839 __unregister_request(osdc, req);
840
841 mutex_unlock(&osdc->request_mutex);
842
843 if (req->r_callback)
844 req->r_callback(req, msg);
845 else
846 complete(&req->r_completion);
847
848 if (flags & CEPH_OSD_FLAG_ONDISK) {
849 if (req->r_safe_callback)
850 req->r_safe_callback(req, msg);
851 complete(&req->r_safe_completion); /* fsync waiter */
852 }
853
854done:
855 ceph_osdc_put_request(req);
856 return;
857
858bad:
859 pr_err("corrupt osd_op_reply got %d %d expected %d\n",
860 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len),
861 (int)sizeof(*rhead));
862 ceph_msg_dump(msg);
863}
864
865
866static int __kick_requests(struct ceph_osd_client *osdc,
867 struct ceph_osd *kickosd)
868{
869 struct ceph_osd_request *req;
870 struct rb_node *p, *n;
871 int needmap = 0;
872 int err;
873
874 dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1);
875 if (kickosd) {
876 err = __reset_osd(osdc, kickosd);
877 if (err == -EAGAIN)
878 return 1;
879 } else {
880 for (p = rb_first(&osdc->osds); p; p = n) {
881 struct ceph_osd *osd =
882 rb_entry(p, struct ceph_osd, o_node);
883
884 n = rb_next(p);
885 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
886 memcmp(&osd->o_con.peer_addr,
887 ceph_osd_addr(osdc->osdmap,
888 osd->o_osd),
889 sizeof(struct ceph_entity_addr)) != 0)
890 __reset_osd(osdc, osd);
891 }
892 }
893
894 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
895 req = rb_entry(p, struct ceph_osd_request, r_node);
896
897 if (req->r_resend) {
898 dout(" r_resend set on tid %llu\n", req->r_tid);
899 __cancel_request(req);
900 goto kick;
901 }
902 if (req->r_osd && kickosd == req->r_osd) {
903 __cancel_request(req);
904 goto kick;
905 }
906
907 err = __map_osds(osdc, req);
908 if (err == 0)
909 continue; /* no change */
910 if (err < 0) {
911 /*
912 * FIXME: really, we should set the request
913 * error and fail if this isn't a 'nofail'
914 * request, but that's a fair bit more
915 * complicated to do. So retry!
916 */
917 dout(" setting r_resend on %llu\n", req->r_tid);
918 req->r_resend = true;
919 continue;
920 }
921 if (req->r_osd == NULL) {
922 dout("tid %llu maps to no valid osd\n", req->r_tid);
923 needmap++; /* request a newer map */
924 continue;
925 }
926
927kick:
928 dout("kicking %p tid %llu osd%d\n", req, req->r_tid,
929 req->r_osd ? req->r_osd->o_osd : -1);
930 req->r_flags |= CEPH_OSD_FLAG_RETRY;
931 err = __send_request(osdc, req);
932 if (err) {
933 dout(" setting r_resend on %llu\n", req->r_tid);
934 req->r_resend = true;
935 }
936 }
937
938 return needmap;
939}
940
941/*
942 * Resubmit osd requests whose osd or osd address has changed. Request
943 * a new osd map if osds are down, or we are otherwise unable to determine
944 * how to direct a request.
945 *
946 * Close connections to down osds.
947 *
948 * If @who is specified, resubmit requests for that specific osd.
949 *
950 * Caller should hold map_sem for read and request_mutex.
951 */
952static void kick_requests(struct ceph_osd_client *osdc,
953 struct ceph_osd *kickosd)
954{
955 int needmap;
956
957 mutex_lock(&osdc->request_mutex);
958 needmap = __kick_requests(osdc, kickosd);
959 mutex_unlock(&osdc->request_mutex);
960
961 if (needmap) {
962 dout("%d requests for down osds, need new map\n", needmap);
963 ceph_monc_request_next_osdmap(&osdc->client->monc);
964 }
965
966}
967/*
968 * Process updated osd map.
969 *
970 * The message contains any number of incremental and full maps, normally
971 * indicating some sort of topology change in the cluster. Kick requests
972 * off to different OSDs as needed.
973 */
974void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
975{
976 void *p, *end, *next;
977 u32 nr_maps, maplen;
978 u32 epoch;
979 struct ceph_osdmap *newmap = NULL, *oldmap;
980 int err;
981 struct ceph_fsid fsid;
982
983 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
984 p = msg->front.iov_base;
985 end = p + msg->front.iov_len;
986
987 /* verify fsid */
988 ceph_decode_need(&p, end, sizeof(fsid), bad);
989 ceph_decode_copy(&p, &fsid, sizeof(fsid));
990 if (ceph_check_fsid(osdc->client, &fsid) < 0)
991 return;
992
993 down_write(&osdc->map_sem);
994
995 /* incremental maps */
996 ceph_decode_32_safe(&p, end, nr_maps, bad);
997 dout(" %d inc maps\n", nr_maps);
998 while (nr_maps > 0) {
999 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1000 epoch = ceph_decode_32(&p);
1001 maplen = ceph_decode_32(&p);
1002 ceph_decode_need(&p, end, maplen, bad);
1003 next = p + maplen;
1004 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1005 dout("applying incremental map %u len %d\n",
1006 epoch, maplen);
1007 newmap = osdmap_apply_incremental(&p, next,
1008 osdc->osdmap,
1009 osdc->client->msgr);
1010 if (IS_ERR(newmap)) {
1011 err = PTR_ERR(newmap);
1012 goto bad;
1013 }
1014 BUG_ON(!newmap);
1015 if (newmap != osdc->osdmap) {
1016 ceph_osdmap_destroy(osdc->osdmap);
1017 osdc->osdmap = newmap;
1018 }
1019 } else {
1020 dout("ignoring incremental map %u len %d\n",
1021 epoch, maplen);
1022 }
1023 p = next;
1024 nr_maps--;
1025 }
1026 if (newmap)
1027 goto done;
1028
1029 /* full maps */
1030 ceph_decode_32_safe(&p, end, nr_maps, bad);
1031 dout(" %d full maps\n", nr_maps);
1032 while (nr_maps) {
1033 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1034 epoch = ceph_decode_32(&p);
1035 maplen = ceph_decode_32(&p);
1036 ceph_decode_need(&p, end, maplen, bad);
1037 if (nr_maps > 1) {
1038 dout("skipping non-latest full map %u len %d\n",
1039 epoch, maplen);
1040 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1041 dout("skipping full map %u len %d, "
1042 "older than our %u\n", epoch, maplen,
1043 osdc->osdmap->epoch);
1044 } else {
1045 dout("taking full map %u len %d\n", epoch, maplen);
1046 newmap = osdmap_decode(&p, p+maplen);
1047 if (IS_ERR(newmap)) {
1048 err = PTR_ERR(newmap);
1049 goto bad;
1050 }
1051 BUG_ON(!newmap);
1052 oldmap = osdc->osdmap;
1053 osdc->osdmap = newmap;
1054 if (oldmap)
1055 ceph_osdmap_destroy(oldmap);
1056 }
1057 p += maplen;
1058 nr_maps--;
1059 }
1060
1061done:
1062 downgrade_write(&osdc->map_sem);
1063 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1064 if (newmap)
1065 kick_requests(osdc, NULL);
1066 up_read(&osdc->map_sem);
1067 return;
1068
1069bad:
1070 pr_err("osdc handle_map corrupt msg\n");
1071 ceph_msg_dump(msg);
1072 up_write(&osdc->map_sem);
1073 return;
1074}
1075
1076
1077/*
1078 * A read request prepares specific pages that data is to be read into.
1079 * When a message is being read off the wire, we call prepare_pages to
1080 * find those pages.
1081 * 0 = success, -1 failure.
1082 */
1083static int __prepare_pages(struct ceph_connection *con,
1084 struct ceph_msg_header *hdr,
1085 struct ceph_osd_request *req,
1086 u64 tid,
1087 struct ceph_msg *m)
1088{
1089 struct ceph_osd *osd = con->private;
1090 struct ceph_osd_client *osdc;
1091 int ret = -1;
1092 int data_len = le32_to_cpu(hdr->data_len);
1093 unsigned data_off = le16_to_cpu(hdr->data_off);
1094
1095 int want = calc_pages_for(data_off & ~PAGE_MASK, data_len);
1096
1097 if (!osd)
1098 return -1;
1099
1100 osdc = osd->o_osdc;
1101
1102 dout("__prepare_pages on msg %p tid %llu, has %d pages, want %d\n", m,
1103 tid, req->r_num_pages, want);
1104 if (unlikely(req->r_num_pages < want))
1105 goto out;
1106 m->pages = req->r_pages;
1107 m->nr_pages = req->r_num_pages;
1108 ret = 0; /* success */
1109out:
1110 BUG_ON(ret < 0 || m->nr_pages < want);
1111
1112 return ret;
1113}
1114
1115/*
1116 * Register request, send initial attempt.
1117 */
1118int ceph_osdc_start_request(struct ceph_osd_client *osdc,
1119 struct ceph_osd_request *req,
1120 bool nofail)
1121{
1122 int rc = 0;
1123
1124 req->r_request->pages = req->r_pages;
1125 req->r_request->nr_pages = req->r_num_pages;
1126
1127 register_request(osdc, req);
1128
1129 down_read(&osdc->map_sem);
1130 mutex_lock(&osdc->request_mutex);
1131 /*
1132 * a racing kick_requests() may have sent the message for us
1133 * while we dropped request_mutex above, so only send now if
1134 * the request still han't been touched yet.
1135 */
1136 if (req->r_sent == 0) {
1137 rc = __send_request(osdc, req);
1138 if (rc) {
1139 if (nofail) {
1140 dout("osdc_start_request failed send, "
1141 " marking %lld\n", req->r_tid);
1142 req->r_resend = true;
1143 rc = 0;
1144 } else {
1145 __unregister_request(osdc, req);
1146 }
1147 }
1148 }
1149 mutex_unlock(&osdc->request_mutex);
1150 up_read(&osdc->map_sem);
1151 return rc;
1152}
1153
1154/*
1155 * wait for a request to complete
1156 */
1157int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
1158 struct ceph_osd_request *req)
1159{
1160 int rc;
1161
1162 rc = wait_for_completion_interruptible(&req->r_completion);
1163 if (rc < 0) {
1164 mutex_lock(&osdc->request_mutex);
1165 __cancel_request(req);
1166 __unregister_request(osdc, req);
1167 mutex_unlock(&osdc->request_mutex);
1168 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
1169 return rc;
1170 }
1171
1172 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
1173 return req->r_result;
1174}
1175
1176/*
1177 * sync - wait for all in-flight requests to flush. avoid starvation.
1178 */
1179void ceph_osdc_sync(struct ceph_osd_client *osdc)
1180{
1181 struct ceph_osd_request *req;
1182 u64 last_tid, next_tid = 0;
1183
1184 mutex_lock(&osdc->request_mutex);
1185 last_tid = osdc->last_tid;
1186 while (1) {
1187 req = __lookup_request_ge(osdc, next_tid);
1188 if (!req)
1189 break;
1190 if (req->r_tid > last_tid)
1191 break;
1192
1193 next_tid = req->r_tid + 1;
1194 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
1195 continue;
1196
1197 ceph_osdc_get_request(req);
1198 mutex_unlock(&osdc->request_mutex);
1199 dout("sync waiting on tid %llu (last is %llu)\n",
1200 req->r_tid, last_tid);
1201 wait_for_completion(&req->r_safe_completion);
1202 mutex_lock(&osdc->request_mutex);
1203 ceph_osdc_put_request(req);
1204 }
1205 mutex_unlock(&osdc->request_mutex);
1206 dout("sync done (thru tid %llu)\n", last_tid);
1207}
1208
1209/*
1210 * init, shutdown
1211 */
1212int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
1213{
1214 int err;
1215
1216 dout("init\n");
1217 osdc->client = client;
1218 osdc->osdmap = NULL;
1219 init_rwsem(&osdc->map_sem);
1220 init_completion(&osdc->map_waiters);
1221 osdc->last_requested_map = 0;
1222 mutex_init(&osdc->request_mutex);
1223 osdc->last_tid = 0;
1224 osdc->osds = RB_ROOT;
1225 INIT_LIST_HEAD(&osdc->osd_lru);
1226 osdc->requests = RB_ROOT;
1227 INIT_LIST_HEAD(&osdc->req_lru);
1228 osdc->num_requests = 0;
1229 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
1230 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
1231
1232 schedule_delayed_work(&osdc->osds_timeout_work,
1233 round_jiffies_relative(osdc->client->mount_args->osd_idle_ttl * HZ));
1234
1235 err = -ENOMEM;
1236 osdc->req_mempool = mempool_create_kmalloc_pool(10,
1237 sizeof(struct ceph_osd_request));
1238 if (!osdc->req_mempool)
1239 goto out;
1240
1241 err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true);
1242 if (err < 0)
1243 goto out_mempool;
1244 err = ceph_msgpool_init(&osdc->msgpool_op_reply,
1245 OSD_OPREPLY_FRONT_LEN, 10, true);
1246 if (err < 0)
1247 goto out_msgpool;
1248 return 0;
1249
1250out_msgpool:
1251 ceph_msgpool_destroy(&osdc->msgpool_op);
1252out_mempool:
1253 mempool_destroy(osdc->req_mempool);
1254out:
1255 return err;
1256}
1257
1258void ceph_osdc_stop(struct ceph_osd_client *osdc)
1259{
1260 cancel_delayed_work_sync(&osdc->timeout_work);
1261 cancel_delayed_work_sync(&osdc->osds_timeout_work);
1262 if (osdc->osdmap) {
1263 ceph_osdmap_destroy(osdc->osdmap);
1264 osdc->osdmap = NULL;
1265 }
1266 remove_old_osds(osdc, 1);
1267 mempool_destroy(osdc->req_mempool);
1268 ceph_msgpool_destroy(&osdc->msgpool_op);
1269 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
1270}
1271
1272/*
1273 * Read some contiguous pages. If we cross a stripe boundary, shorten
1274 * *plen. Return number of bytes read, or error.
1275 */
1276int ceph_osdc_readpages(struct ceph_osd_client *osdc,
1277 struct ceph_vino vino, struct ceph_file_layout *layout,
1278 u64 off, u64 *plen,
1279 u32 truncate_seq, u64 truncate_size,
1280 struct page **pages, int num_pages)
1281{
1282 struct ceph_osd_request *req;
1283 int rc = 0;
1284
1285 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
1286 vino.snap, off, *plen);
1287 req = ceph_osdc_new_request(osdc, layout, vino, off, plen,
1288 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
1289 NULL, 0, truncate_seq, truncate_size, NULL,
1290 false, 1);
1291 if (IS_ERR(req))
1292 return PTR_ERR(req);
1293
1294 /* it may be a short read due to an object boundary */
1295 req->r_pages = pages;
1296 num_pages = calc_pages_for(off, *plen);
1297 req->r_num_pages = num_pages;
1298
1299 dout("readpages final extent is %llu~%llu (%d pages)\n",
1300 off, *plen, req->r_num_pages);
1301
1302 rc = ceph_osdc_start_request(osdc, req, false);
1303 if (!rc)
1304 rc = ceph_osdc_wait_request(osdc, req);
1305
1306 ceph_osdc_put_request(req);
1307 dout("readpages result %d\n", rc);
1308 return rc;
1309}
1310
1311/*
1312 * do a synchronous write on N pages
1313 */
1314int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
1315 struct ceph_file_layout *layout,
1316 struct ceph_snap_context *snapc,
1317 u64 off, u64 len,
1318 u32 truncate_seq, u64 truncate_size,
1319 struct timespec *mtime,
1320 struct page **pages, int num_pages,
1321 int flags, int do_sync, bool nofail)
1322{
1323 struct ceph_osd_request *req;
1324 int rc = 0;
1325
1326 BUG_ON(vino.snap != CEPH_NOSNAP);
1327 req = ceph_osdc_new_request(osdc, layout, vino, off, &len,
1328 CEPH_OSD_OP_WRITE,
1329 flags | CEPH_OSD_FLAG_ONDISK |
1330 CEPH_OSD_FLAG_WRITE,
1331 snapc, do_sync,
1332 truncate_seq, truncate_size, mtime,
1333 nofail, 1);
1334 if (IS_ERR(req))
1335 return PTR_ERR(req);
1336
1337 /* it may be a short write due to an object boundary */
1338 req->r_pages = pages;
1339 req->r_num_pages = calc_pages_for(off, len);
1340 dout("writepages %llu~%llu (%d pages)\n", off, len,
1341 req->r_num_pages);
1342
1343 rc = ceph_osdc_start_request(osdc, req, nofail);
1344 if (!rc)
1345 rc = ceph_osdc_wait_request(osdc, req);
1346
1347 ceph_osdc_put_request(req);
1348 if (rc == 0)
1349 rc = len;
1350 dout("writepages result %d\n", rc);
1351 return rc;
1352}
1353
1354/*
1355 * handle incoming message
1356 */
1357static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
1358{
1359 struct ceph_osd *osd = con->private;
1360 struct ceph_osd_client *osdc;
1361 int type = le16_to_cpu(msg->hdr.type);
1362
1363 if (!osd)
1364 return;
1365 osdc = osd->o_osdc;
1366
1367 switch (type) {
1368 case CEPH_MSG_OSD_MAP:
1369 ceph_osdc_handle_map(osdc, msg);
1370 break;
1371 case CEPH_MSG_OSD_OPREPLY:
1372 handle_reply(osdc, msg, con);
1373 break;
1374
1375 default:
1376 pr_err("received unknown message type %d %s\n", type,
1377 ceph_msg_type_name(type));
1378 }
1379 ceph_msg_put(msg);
1380}
1381
1382/*
1383 * lookup and return message for incoming reply
1384 */
1385static struct ceph_msg *get_reply(struct ceph_connection *con,
1386 struct ceph_msg_header *hdr,
1387 int *skip)
1388{
1389 struct ceph_osd *osd = con->private;
1390 struct ceph_osd_client *osdc = osd->o_osdc;
1391 struct ceph_msg *m;
1392 struct ceph_osd_request *req;
1393 int front = le32_to_cpu(hdr->front_len);
1394 int data_len = le32_to_cpu(hdr->data_len);
1395 u64 tid;
1396 int err;
1397
1398 tid = le64_to_cpu(hdr->tid);
1399 mutex_lock(&osdc->request_mutex);
1400 req = __lookup_request(osdc, tid);
1401 if (!req) {
1402 *skip = 1;
1403 m = NULL;
1404 pr_info("get_reply unknown tid %llu from osd%d\n", tid,
1405 osd->o_osd);
1406 goto out;
1407 }
1408
1409 if (req->r_con_filling_msg) {
1410 dout("get_reply revoking msg %p from old con %p\n",
1411 req->r_reply, req->r_con_filling_msg);
1412 ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply);
1413 ceph_con_put(req->r_con_filling_msg);
1414 }
1415
1416 if (front > req->r_reply->front.iov_len) {
1417 pr_warning("get_reply front %d > preallocated %d\n",
1418 front, (int)req->r_reply->front.iov_len);
1419 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, 0, 0, NULL);
1420 if (IS_ERR(m))
1421 goto out;
1422 ceph_msg_put(req->r_reply);
1423 req->r_reply = m;
1424 }
1425 m = ceph_msg_get(req->r_reply);
1426
1427 if (data_len > 0) {
1428 err = __prepare_pages(con, hdr, req, tid, m);
1429 if (err < 0) {
1430 *skip = 1;
1431 ceph_msg_put(m);
1432 m = ERR_PTR(err);
1433 }
1434 }
1435 *skip = 0;
1436 req->r_con_filling_msg = ceph_con_get(con);
1437 dout("get_reply tid %lld %p\n", tid, m);
1438
1439out:
1440 mutex_unlock(&osdc->request_mutex);
1441 return m;
1442
1443}
1444
1445static struct ceph_msg *alloc_msg(struct ceph_connection *con,
1446 struct ceph_msg_header *hdr,
1447 int *skip)
1448{
1449 struct ceph_osd *osd = con->private;
1450 int type = le16_to_cpu(hdr->type);
1451 int front = le32_to_cpu(hdr->front_len);
1452
1453 switch (type) {
1454 case CEPH_MSG_OSD_MAP:
1455 return ceph_msg_new(type, front, 0, 0, NULL);
1456 case CEPH_MSG_OSD_OPREPLY:
1457 return get_reply(con, hdr, skip);
1458 default:
1459 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
1460 osd->o_osd);
1461 *skip = 1;
1462 return NULL;
1463 }
1464}
1465
1466/*
1467 * Wrappers to refcount containing ceph_osd struct
1468 */
1469static struct ceph_connection *get_osd_con(struct ceph_connection *con)
1470{
1471 struct ceph_osd *osd = con->private;
1472 if (get_osd(osd))
1473 return con;
1474 return NULL;
1475}
1476
1477static void put_osd_con(struct ceph_connection *con)
1478{
1479 struct ceph_osd *osd = con->private;
1480 put_osd(osd);
1481}
1482
1483/*
1484 * authentication
1485 */
1486static int get_authorizer(struct ceph_connection *con,
1487 void **buf, int *len, int *proto,
1488 void **reply_buf, int *reply_len, int force_new)
1489{
1490 struct ceph_osd *o = con->private;
1491 struct ceph_osd_client *osdc = o->o_osdc;
1492 struct ceph_auth_client *ac = osdc->client->monc.auth;
1493 int ret = 0;
1494
1495 if (force_new && o->o_authorizer) {
1496 ac->ops->destroy_authorizer(ac, o->o_authorizer);
1497 o->o_authorizer = NULL;
1498 }
1499 if (o->o_authorizer == NULL) {
1500 ret = ac->ops->create_authorizer(
1501 ac, CEPH_ENTITY_TYPE_OSD,
1502 &o->o_authorizer,
1503 &o->o_authorizer_buf,
1504 &o->o_authorizer_buf_len,
1505 &o->o_authorizer_reply_buf,
1506 &o->o_authorizer_reply_buf_len);
1507 if (ret)
1508 return ret;
1509 }
1510
1511 *proto = ac->protocol;
1512 *buf = o->o_authorizer_buf;
1513 *len = o->o_authorizer_buf_len;
1514 *reply_buf = o->o_authorizer_reply_buf;
1515 *reply_len = o->o_authorizer_reply_buf_len;
1516 return 0;
1517}
1518
1519
1520static int verify_authorizer_reply(struct ceph_connection *con, int len)
1521{
1522 struct ceph_osd *o = con->private;
1523 struct ceph_osd_client *osdc = o->o_osdc;
1524 struct ceph_auth_client *ac = osdc->client->monc.auth;
1525
1526 return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len);
1527}
1528
1529static int invalidate_authorizer(struct ceph_connection *con)
1530{
1531 struct ceph_osd *o = con->private;
1532 struct ceph_osd_client *osdc = o->o_osdc;
1533 struct ceph_auth_client *ac = osdc->client->monc.auth;
1534
1535 if (ac->ops->invalidate_authorizer)
1536 ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
1537
1538 return ceph_monc_validate_auth(&osdc->client->monc);
1539}
1540
1541const static struct ceph_connection_operations osd_con_ops = {
1542 .get = get_osd_con,
1543 .put = put_osd_con,
1544 .dispatch = dispatch,
1545 .get_authorizer = get_authorizer,
1546 .verify_authorizer_reply = verify_authorizer_reply,
1547 .invalidate_authorizer = invalidate_authorizer,
1548 .alloc_msg = alloc_msg,
1549 .fault = osd_reset,
1550};
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-16 15:01:54 -0500