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-rw-r--r--fs/ceph/osd_client.c1537
1 files changed, 1537 insertions, 0 deletions
diff --git a/fs/ceph/osd_client.c b/fs/ceph/osd_client.c
new file mode 100644
index 000000000000..dbe63db9762f
--- /dev/null
+++ b/fs/ceph/osd_client.c
@@ -0,0 +1,1537 @@
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 int ret = 0;
417
418 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
419 if (list_empty(&osd->o_requests)) {
420 __remove_osd(osdc, osd);
421 } else {
422 ceph_con_close(&osd->o_con);
423 ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]);
424 osd->o_incarnation++;
425 }
426 return ret;
427}
428
429static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
430{
431 struct rb_node **p = &osdc->osds.rb_node;
432 struct rb_node *parent = NULL;
433 struct ceph_osd *osd = NULL;
434
435 while (*p) {
436 parent = *p;
437 osd = rb_entry(parent, struct ceph_osd, o_node);
438 if (new->o_osd < osd->o_osd)
439 p = &(*p)->rb_left;
440 else if (new->o_osd > osd->o_osd)
441 p = &(*p)->rb_right;
442 else
443 BUG();
444 }
445
446 rb_link_node(&new->o_node, parent, p);
447 rb_insert_color(&new->o_node, &osdc->osds);
448}
449
450static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
451{
452 struct ceph_osd *osd;
453 struct rb_node *n = osdc->osds.rb_node;
454
455 while (n) {
456 osd = rb_entry(n, struct ceph_osd, o_node);
457 if (o < osd->o_osd)
458 n = n->rb_left;
459 else if (o > osd->o_osd)
460 n = n->rb_right;
461 else
462 return osd;
463 }
464 return NULL;
465}
466
467static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
468{
469 schedule_delayed_work(&osdc->timeout_work,
470 osdc->client->mount_args->osd_keepalive_timeout * HZ);
471}
472
473static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
474{
475 cancel_delayed_work(&osdc->timeout_work);
476}
477
478/*
479 * Register request, assign tid. If this is the first request, set up
480 * the timeout event.
481 */
482static void register_request(struct ceph_osd_client *osdc,
483 struct ceph_osd_request *req)
484{
485 mutex_lock(&osdc->request_mutex);
486 req->r_tid = ++osdc->last_tid;
487 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
488 INIT_LIST_HEAD(&req->r_req_lru_item);
489
490 dout("register_request %p tid %lld\n", req, req->r_tid);
491 __insert_request(osdc, req);
492 ceph_osdc_get_request(req);
493 osdc->num_requests++;
494
495 if (osdc->num_requests == 1) {
496 dout(" first request, scheduling timeout\n");
497 __schedule_osd_timeout(osdc);
498 }
499 mutex_unlock(&osdc->request_mutex);
500}
501
502/*
503 * called under osdc->request_mutex
504 */
505static void __unregister_request(struct ceph_osd_client *osdc,
506 struct ceph_osd_request *req)
507{
508 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
509 rb_erase(&req->r_node, &osdc->requests);
510 osdc->num_requests--;
511
512 if (req->r_osd) {
513 /* make sure the original request isn't in flight. */
514 ceph_con_revoke(&req->r_osd->o_con, req->r_request);
515
516 list_del_init(&req->r_osd_item);
517 if (list_empty(&req->r_osd->o_requests))
518 __move_osd_to_lru(osdc, req->r_osd);
519 req->r_osd = NULL;
520 }
521
522 ceph_osdc_put_request(req);
523
524 list_del_init(&req->r_req_lru_item);
525 if (osdc->num_requests == 0) {
526 dout(" no requests, canceling timeout\n");
527 __cancel_osd_timeout(osdc);
528 }
529}
530
531/*
532 * Cancel a previously queued request message
533 */
534static void __cancel_request(struct ceph_osd_request *req)
535{
536 if (req->r_sent) {
537 ceph_con_revoke(&req->r_osd->o_con, req->r_request);
538 req->r_sent = 0;
539 }
540 list_del_init(&req->r_req_lru_item);
541}
542
543/*
544 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
545 * (as needed), and set the request r_osd appropriately. If there is
546 * no up osd, set r_osd to NULL.
547 *
548 * Return 0 if unchanged, 1 if changed, or negative on error.
549 *
550 * Caller should hold map_sem for read and request_mutex.
551 */
552static int __map_osds(struct ceph_osd_client *osdc,
553 struct ceph_osd_request *req)
554{
555 struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
556 struct ceph_pg pgid;
557 int o = -1;
558 int err;
559
560 dout("map_osds %p tid %lld\n", req, req->r_tid);
561 err = ceph_calc_object_layout(&reqhead->layout, req->r_oid,
562 &req->r_file_layout, osdc->osdmap);
563 if (err)
564 return err;
565 pgid = reqhead->layout.ol_pgid;
566 req->r_pgid = pgid;
567
568 o = ceph_calc_pg_primary(osdc->osdmap, pgid);
569
570 if ((req->r_osd && req->r_osd->o_osd == o &&
571 req->r_sent >= req->r_osd->o_incarnation) ||
572 (req->r_osd == NULL && o == -1))
573 return 0; /* no change */
574
575 dout("map_osds tid %llu pgid %d.%x osd%d (was osd%d)\n",
576 req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o,
577 req->r_osd ? req->r_osd->o_osd : -1);
578
579 if (req->r_osd) {
580 __cancel_request(req);
581 list_del_init(&req->r_osd_item);
582 req->r_osd = NULL;
583 }
584
585 req->r_osd = __lookup_osd(osdc, o);
586 if (!req->r_osd && o >= 0) {
587 err = -ENOMEM;
588 req->r_osd = create_osd(osdc);
589 if (!req->r_osd)
590 goto out;
591
592 dout("map_osds osd %p is osd%d\n", req->r_osd, o);
593 req->r_osd->o_osd = o;
594 req->r_osd->o_con.peer_name.num = cpu_to_le64(o);
595 __insert_osd(osdc, req->r_osd);
596
597 ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]);
598 }
599
600 if (req->r_osd) {
601 __remove_osd_from_lru(req->r_osd);
602 list_add(&req->r_osd_item, &req->r_osd->o_requests);
603 }
604 err = 1; /* osd changed */
605
606out:
607 return err;
608}
609
610/*
611 * caller should hold map_sem (for read) and request_mutex
612 */
613static int __send_request(struct ceph_osd_client *osdc,
614 struct ceph_osd_request *req)
615{
616 struct ceph_osd_request_head *reqhead;
617 int err;
618
619 err = __map_osds(osdc, req);
620 if (err < 0)
621 return err;
622 if (req->r_osd == NULL) {
623 dout("send_request %p no up osds in pg\n", req);
624 ceph_monc_request_next_osdmap(&osdc->client->monc);
625 return 0;
626 }
627
628 dout("send_request %p tid %llu to osd%d flags %d\n",
629 req, req->r_tid, req->r_osd->o_osd, req->r_flags);
630
631 reqhead = req->r_request->front.iov_base;
632 reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch);
633 reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */
634 reqhead->reassert_version = req->r_reassert_version;
635
636 req->r_sent_stamp = jiffies;
637 list_move_tail(&osdc->req_lru, &req->r_req_lru_item);
638
639 ceph_msg_get(req->r_request); /* send consumes a ref */
640 ceph_con_send(&req->r_osd->o_con, req->r_request);
641 req->r_sent = req->r_osd->o_incarnation;
642 return 0;
643}
644
645/*
646 * Timeout callback, called every N seconds when 1 or more osd
647 * requests has been active for more than N seconds. When this
648 * happens, we ping all OSDs with requests who have timed out to
649 * ensure any communications channel reset is detected. Reset the
650 * request timeouts another N seconds in the future as we go.
651 * Reschedule the timeout event another N seconds in future (unless
652 * there are no open requests).
653 */
654static void handle_timeout(struct work_struct *work)
655{
656 struct ceph_osd_client *osdc =
657 container_of(work, struct ceph_osd_client, timeout_work.work);
658 struct ceph_osd_request *req, *last_req = NULL;
659 struct ceph_osd *osd;
660 unsigned long timeout = osdc->client->mount_args->osd_timeout * HZ;
661 unsigned long keepalive =
662 osdc->client->mount_args->osd_keepalive_timeout * HZ;
663 unsigned long last_sent = 0;
664 struct rb_node *p;
665 struct list_head slow_osds;
666
667 dout("timeout\n");
668 down_read(&osdc->map_sem);
669
670 ceph_monc_request_next_osdmap(&osdc->client->monc);
671
672 mutex_lock(&osdc->request_mutex);
673 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
674 req = rb_entry(p, struct ceph_osd_request, r_node);
675
676 if (req->r_resend) {
677 int err;
678
679 dout("osdc resending prev failed %lld\n", req->r_tid);
680 err = __send_request(osdc, req);
681 if (err)
682 dout("osdc failed again on %lld\n", req->r_tid);
683 else
684 req->r_resend = false;
685 continue;
686 }
687 }
688
689 /*
690 * reset osds that appear to be _really_ unresponsive. this
691 * is a failsafe measure.. we really shouldn't be getting to
692 * this point if the system is working properly. the monitors
693 * should mark the osd as failed and we should find out about
694 * it from an updated osd map.
695 */
696 while (!list_empty(&osdc->req_lru)) {
697 req = list_entry(osdc->req_lru.next, struct ceph_osd_request,
698 r_req_lru_item);
699
700 if (time_before(jiffies, req->r_sent_stamp + timeout))
701 break;
702
703 BUG_ON(req == last_req && req->r_sent_stamp == last_sent);
704 last_req = req;
705 last_sent = req->r_sent_stamp;
706
707 osd = req->r_osd;
708 BUG_ON(!osd);
709 pr_warning(" tid %llu timed out on osd%d, will reset osd\n",
710 req->r_tid, osd->o_osd);
711 __kick_requests(osdc, osd);
712 }
713
714 /*
715 * ping osds that are a bit slow. this ensures that if there
716 * is a break in the TCP connection we will notice, and reopen
717 * a connection with that osd (from the fault callback).
718 */
719 INIT_LIST_HEAD(&slow_osds);
720 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
721 if (time_before(jiffies, req->r_sent_stamp + keepalive))
722 break;
723
724 osd = req->r_osd;
725 BUG_ON(!osd);
726 dout(" tid %llu is slow, will send keepalive on osd%d\n",
727 req->r_tid, osd->o_osd);
728 list_move_tail(&osd->o_keepalive_item, &slow_osds);
729 }
730 while (!list_empty(&slow_osds)) {
731 osd = list_entry(slow_osds.next, struct ceph_osd,
732 o_keepalive_item);
733 list_del_init(&osd->o_keepalive_item);
734 ceph_con_keepalive(&osd->o_con);
735 }
736
737 __schedule_osd_timeout(osdc);
738 mutex_unlock(&osdc->request_mutex);
739
740 up_read(&osdc->map_sem);
741}
742
743static void handle_osds_timeout(struct work_struct *work)
744{
745 struct ceph_osd_client *osdc =
746 container_of(work, struct ceph_osd_client,
747 osds_timeout_work.work);
748 unsigned long delay =
749 osdc->client->mount_args->osd_idle_ttl * HZ >> 2;
750
751 dout("osds timeout\n");
752 down_read(&osdc->map_sem);
753 remove_old_osds(osdc, 0);
754 up_read(&osdc->map_sem);
755
756 schedule_delayed_work(&osdc->osds_timeout_work,
757 round_jiffies_relative(delay));
758}
759
760/*
761 * handle osd op reply. either call the callback if it is specified,
762 * or do the completion to wake up the waiting thread.
763 */
764static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
765 struct ceph_connection *con)
766{
767 struct ceph_osd_reply_head *rhead = msg->front.iov_base;
768 struct ceph_osd_request *req;
769 u64 tid;
770 int numops, object_len, flags;
771
772 tid = le64_to_cpu(msg->hdr.tid);
773 if (msg->front.iov_len < sizeof(*rhead))
774 goto bad;
775 numops = le32_to_cpu(rhead->num_ops);
776 object_len = le32_to_cpu(rhead->object_len);
777 if (msg->front.iov_len != sizeof(*rhead) + object_len +
778 numops * sizeof(struct ceph_osd_op))
779 goto bad;
780 dout("handle_reply %p tid %llu\n", msg, tid);
781
782 /* lookup */
783 mutex_lock(&osdc->request_mutex);
784 req = __lookup_request(osdc, tid);
785 if (req == NULL) {
786 dout("handle_reply tid %llu dne\n", tid);
787 mutex_unlock(&osdc->request_mutex);
788 return;
789 }
790 ceph_osdc_get_request(req);
791 flags = le32_to_cpu(rhead->flags);
792
793 /*
794 * if this connection filled our message, drop our reference now, to
795 * avoid a (safe but slower) revoke later.
796 */
797 if (req->r_con_filling_msg == con && req->r_reply == msg) {
798 dout(" dropping con_filling_msg ref %p\n", con);
799 req->r_con_filling_msg = NULL;
800 ceph_con_put(con);
801 }
802
803 if (!req->r_got_reply) {
804 unsigned bytes;
805
806 req->r_result = le32_to_cpu(rhead->result);
807 bytes = le32_to_cpu(msg->hdr.data_len);
808 dout("handle_reply result %d bytes %d\n", req->r_result,
809 bytes);
810 if (req->r_result == 0)
811 req->r_result = bytes;
812
813 /* in case this is a write and we need to replay, */
814 req->r_reassert_version = rhead->reassert_version;
815
816 req->r_got_reply = 1;
817 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
818 dout("handle_reply tid %llu dup ack\n", tid);
819 mutex_unlock(&osdc->request_mutex);
820 goto done;
821 }
822
823 dout("handle_reply tid %llu flags %d\n", tid, flags);
824
825 /* either this is a read, or we got the safe response */
826 if ((flags & CEPH_OSD_FLAG_ONDISK) ||
827 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
828 __unregister_request(osdc, req);
829
830 mutex_unlock(&osdc->request_mutex);
831
832 if (req->r_callback)
833 req->r_callback(req, msg);
834 else
835 complete(&req->r_completion);
836
837 if (flags & CEPH_OSD_FLAG_ONDISK) {
838 if (req->r_safe_callback)
839 req->r_safe_callback(req, msg);
840 complete(&req->r_safe_completion); /* fsync waiter */
841 }
842
843done:
844 ceph_osdc_put_request(req);
845 return;
846
847bad:
848 pr_err("corrupt osd_op_reply got %d %d expected %d\n",
849 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len),
850 (int)sizeof(*rhead));
851 ceph_msg_dump(msg);
852}
853
854
855static int __kick_requests(struct ceph_osd_client *osdc,
856 struct ceph_osd *kickosd)
857{
858 struct ceph_osd_request *req;
859 struct rb_node *p, *n;
860 int needmap = 0;
861 int err;
862
863 dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1);
864 if (kickosd) {
865 __reset_osd(osdc, kickosd);
866 } else {
867 for (p = rb_first(&osdc->osds); p; p = n) {
868 struct ceph_osd *osd =
869 rb_entry(p, struct ceph_osd, o_node);
870
871 n = rb_next(p);
872 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
873 memcmp(&osd->o_con.peer_addr,
874 ceph_osd_addr(osdc->osdmap,
875 osd->o_osd),
876 sizeof(struct ceph_entity_addr)) != 0)
877 __reset_osd(osdc, osd);
878 }
879 }
880
881 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
882 req = rb_entry(p, struct ceph_osd_request, r_node);
883
884 if (req->r_resend) {
885 dout(" r_resend set on tid %llu\n", req->r_tid);
886 __cancel_request(req);
887 goto kick;
888 }
889 if (req->r_osd && kickosd == req->r_osd) {
890 __cancel_request(req);
891 goto kick;
892 }
893
894 err = __map_osds(osdc, req);
895 if (err == 0)
896 continue; /* no change */
897 if (err < 0) {
898 /*
899 * FIXME: really, we should set the request
900 * error and fail if this isn't a 'nofail'
901 * request, but that's a fair bit more
902 * complicated to do. So retry!
903 */
904 dout(" setting r_resend on %llu\n", req->r_tid);
905 req->r_resend = true;
906 continue;
907 }
908 if (req->r_osd == NULL) {
909 dout("tid %llu maps to no valid osd\n", req->r_tid);
910 needmap++; /* request a newer map */
911 continue;
912 }
913
914kick:
915 dout("kicking %p tid %llu osd%d\n", req, req->r_tid,
916 req->r_osd->o_osd);
917 req->r_flags |= CEPH_OSD_FLAG_RETRY;
918 err = __send_request(osdc, req);
919 if (err) {
920 dout(" setting r_resend on %llu\n", req->r_tid);
921 req->r_resend = true;
922 }
923 }
924
925 return needmap;
926}
927
928/*
929 * Resubmit osd requests whose osd or osd address has changed. Request
930 * a new osd map if osds are down, or we are otherwise unable to determine
931 * how to direct a request.
932 *
933 * Close connections to down osds.
934 *
935 * If @who is specified, resubmit requests for that specific osd.
936 *
937 * Caller should hold map_sem for read and request_mutex.
938 */
939static void kick_requests(struct ceph_osd_client *osdc,
940 struct ceph_osd *kickosd)
941{
942 int needmap;
943
944 mutex_lock(&osdc->request_mutex);
945 needmap = __kick_requests(osdc, kickosd);
946 mutex_unlock(&osdc->request_mutex);
947
948 if (needmap) {
949 dout("%d requests for down osds, need new map\n", needmap);
950 ceph_monc_request_next_osdmap(&osdc->client->monc);
951 }
952
953}
954/*
955 * Process updated osd map.
956 *
957 * The message contains any number of incremental and full maps, normally
958 * indicating some sort of topology change in the cluster. Kick requests
959 * off to different OSDs as needed.
960 */
961void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
962{
963 void *p, *end, *next;
964 u32 nr_maps, maplen;
965 u32 epoch;
966 struct ceph_osdmap *newmap = NULL, *oldmap;
967 int err;
968 struct ceph_fsid fsid;
969
970 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
971 p = msg->front.iov_base;
972 end = p + msg->front.iov_len;
973
974 /* verify fsid */
975 ceph_decode_need(&p, end, sizeof(fsid), bad);
976 ceph_decode_copy(&p, &fsid, sizeof(fsid));
977 if (ceph_check_fsid(osdc->client, &fsid) < 0)
978 return;
979
980 down_write(&osdc->map_sem);
981
982 /* incremental maps */
983 ceph_decode_32_safe(&p, end, nr_maps, bad);
984 dout(" %d inc maps\n", nr_maps);
985 while (nr_maps > 0) {
986 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
987 epoch = ceph_decode_32(&p);
988 maplen = ceph_decode_32(&p);
989 ceph_decode_need(&p, end, maplen, bad);
990 next = p + maplen;
991 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
992 dout("applying incremental map %u len %d\n",
993 epoch, maplen);
994 newmap = osdmap_apply_incremental(&p, next,
995 osdc->osdmap,
996 osdc->client->msgr);
997 if (IS_ERR(newmap)) {
998 err = PTR_ERR(newmap);
999 goto bad;
1000 }
1001 BUG_ON(!newmap);
1002 if (newmap != osdc->osdmap) {
1003 ceph_osdmap_destroy(osdc->osdmap);
1004 osdc->osdmap = newmap;
1005 }
1006 } else {
1007 dout("ignoring incremental map %u len %d\n",
1008 epoch, maplen);
1009 }
1010 p = next;
1011 nr_maps--;
1012 }
1013 if (newmap)
1014 goto done;
1015
1016 /* full maps */
1017 ceph_decode_32_safe(&p, end, nr_maps, bad);
1018 dout(" %d full maps\n", nr_maps);
1019 while (nr_maps) {
1020 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1021 epoch = ceph_decode_32(&p);
1022 maplen = ceph_decode_32(&p);
1023 ceph_decode_need(&p, end, maplen, bad);
1024 if (nr_maps > 1) {
1025 dout("skipping non-latest full map %u len %d\n",
1026 epoch, maplen);
1027 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1028 dout("skipping full map %u len %d, "
1029 "older than our %u\n", epoch, maplen,
1030 osdc->osdmap->epoch);
1031 } else {
1032 dout("taking full map %u len %d\n", epoch, maplen);
1033 newmap = osdmap_decode(&p, p+maplen);
1034 if (IS_ERR(newmap)) {
1035 err = PTR_ERR(newmap);
1036 goto bad;
1037 }
1038 BUG_ON(!newmap);
1039 oldmap = osdc->osdmap;
1040 osdc->osdmap = newmap;
1041 if (oldmap)
1042 ceph_osdmap_destroy(oldmap);
1043 }
1044 p += maplen;
1045 nr_maps--;
1046 }
1047
1048done:
1049 downgrade_write(&osdc->map_sem);
1050 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1051 if (newmap)
1052 kick_requests(osdc, NULL);
1053 up_read(&osdc->map_sem);
1054 return;
1055
1056bad:
1057 pr_err("osdc handle_map corrupt msg\n");
1058 ceph_msg_dump(msg);
1059 up_write(&osdc->map_sem);
1060 return;
1061}
1062
1063
1064/*
1065 * A read request prepares specific pages that data is to be read into.
1066 * When a message is being read off the wire, we call prepare_pages to
1067 * find those pages.
1068 * 0 = success, -1 failure.
1069 */
1070static int __prepare_pages(struct ceph_connection *con,
1071 struct ceph_msg_header *hdr,
1072 struct ceph_osd_request *req,
1073 u64 tid,
1074 struct ceph_msg *m)
1075{
1076 struct ceph_osd *osd = con->private;
1077 struct ceph_osd_client *osdc;
1078 int ret = -1;
1079 int data_len = le32_to_cpu(hdr->data_len);
1080 unsigned data_off = le16_to_cpu(hdr->data_off);
1081
1082 int want = calc_pages_for(data_off & ~PAGE_MASK, data_len);
1083
1084 if (!osd)
1085 return -1;
1086
1087 osdc = osd->o_osdc;
1088
1089 dout("__prepare_pages on msg %p tid %llu, has %d pages, want %d\n", m,
1090 tid, req->r_num_pages, want);
1091 if (unlikely(req->r_num_pages < want))
1092 goto out;
1093 m->pages = req->r_pages;
1094 m->nr_pages = req->r_num_pages;
1095 ret = 0; /* success */
1096out:
1097 BUG_ON(ret < 0 || m->nr_pages < want);
1098
1099 return ret;
1100}
1101
1102/*
1103 * Register request, send initial attempt.
1104 */
1105int ceph_osdc_start_request(struct ceph_osd_client *osdc,
1106 struct ceph_osd_request *req,
1107 bool nofail)
1108{
1109 int rc = 0;
1110
1111 req->r_request->pages = req->r_pages;
1112 req->r_request->nr_pages = req->r_num_pages;
1113
1114 register_request(osdc, req);
1115
1116 down_read(&osdc->map_sem);
1117 mutex_lock(&osdc->request_mutex);
1118 /*
1119 * a racing kick_requests() may have sent the message for us
1120 * while we dropped request_mutex above, so only send now if
1121 * the request still han't been touched yet.
1122 */
1123 if (req->r_sent == 0) {
1124 rc = __send_request(osdc, req);
1125 if (rc) {
1126 if (nofail) {
1127 dout("osdc_start_request failed send, "
1128 " marking %lld\n", req->r_tid);
1129 req->r_resend = true;
1130 rc = 0;
1131 } else {
1132 __unregister_request(osdc, req);
1133 }
1134 }
1135 }
1136 mutex_unlock(&osdc->request_mutex);
1137 up_read(&osdc->map_sem);
1138 return rc;
1139}
1140
1141/*
1142 * wait for a request to complete
1143 */
1144int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
1145 struct ceph_osd_request *req)
1146{
1147 int rc;
1148
1149 rc = wait_for_completion_interruptible(&req->r_completion);
1150 if (rc < 0) {
1151 mutex_lock(&osdc->request_mutex);
1152 __cancel_request(req);
1153 __unregister_request(osdc, req);
1154 mutex_unlock(&osdc->request_mutex);
1155 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
1156 return rc;
1157 }
1158
1159 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
1160 return req->r_result;
1161}
1162
1163/*
1164 * sync - wait for all in-flight requests to flush. avoid starvation.
1165 */
1166void ceph_osdc_sync(struct ceph_osd_client *osdc)
1167{
1168 struct ceph_osd_request *req;
1169 u64 last_tid, next_tid = 0;
1170
1171 mutex_lock(&osdc->request_mutex);
1172 last_tid = osdc->last_tid;
1173 while (1) {
1174 req = __lookup_request_ge(osdc, next_tid);
1175 if (!req)
1176 break;
1177 if (req->r_tid > last_tid)
1178 break;
1179
1180 next_tid = req->r_tid + 1;
1181 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
1182 continue;
1183
1184 ceph_osdc_get_request(req);
1185 mutex_unlock(&osdc->request_mutex);
1186 dout("sync waiting on tid %llu (last is %llu)\n",
1187 req->r_tid, last_tid);
1188 wait_for_completion(&req->r_safe_completion);
1189 mutex_lock(&osdc->request_mutex);
1190 ceph_osdc_put_request(req);
1191 }
1192 mutex_unlock(&osdc->request_mutex);
1193 dout("sync done (thru tid %llu)\n", last_tid);
1194}
1195
1196/*
1197 * init, shutdown
1198 */
1199int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
1200{
1201 int err;
1202
1203 dout("init\n");
1204 osdc->client = client;
1205 osdc->osdmap = NULL;
1206 init_rwsem(&osdc->map_sem);
1207 init_completion(&osdc->map_waiters);
1208 osdc->last_requested_map = 0;
1209 mutex_init(&osdc->request_mutex);
1210 osdc->last_tid = 0;
1211 osdc->osds = RB_ROOT;
1212 INIT_LIST_HEAD(&osdc->osd_lru);
1213 osdc->requests = RB_ROOT;
1214 INIT_LIST_HEAD(&osdc->req_lru);
1215 osdc->num_requests = 0;
1216 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
1217 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
1218
1219 schedule_delayed_work(&osdc->osds_timeout_work,
1220 round_jiffies_relative(osdc->client->mount_args->osd_idle_ttl * HZ));
1221
1222 err = -ENOMEM;
1223 osdc->req_mempool = mempool_create_kmalloc_pool(10,
1224 sizeof(struct ceph_osd_request));
1225 if (!osdc->req_mempool)
1226 goto out;
1227
1228 err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true);
1229 if (err < 0)
1230 goto out_mempool;
1231 err = ceph_msgpool_init(&osdc->msgpool_op_reply,
1232 OSD_OPREPLY_FRONT_LEN, 10, true);
1233 if (err < 0)
1234 goto out_msgpool;
1235 return 0;
1236
1237out_msgpool:
1238 ceph_msgpool_destroy(&osdc->msgpool_op);
1239out_mempool:
1240 mempool_destroy(osdc->req_mempool);
1241out:
1242 return err;
1243}
1244
1245void ceph_osdc_stop(struct ceph_osd_client *osdc)
1246{
1247 cancel_delayed_work_sync(&osdc->timeout_work);
1248 cancel_delayed_work_sync(&osdc->osds_timeout_work);
1249 if (osdc->osdmap) {
1250 ceph_osdmap_destroy(osdc->osdmap);
1251 osdc->osdmap = NULL;
1252 }
1253 remove_old_osds(osdc, 1);
1254 mempool_destroy(osdc->req_mempool);
1255 ceph_msgpool_destroy(&osdc->msgpool_op);
1256 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
1257}
1258
1259/*
1260 * Read some contiguous pages. If we cross a stripe boundary, shorten
1261 * *plen. Return number of bytes read, or error.
1262 */
1263int ceph_osdc_readpages(struct ceph_osd_client *osdc,
1264 struct ceph_vino vino, struct ceph_file_layout *layout,
1265 u64 off, u64 *plen,
1266 u32 truncate_seq, u64 truncate_size,
1267 struct page **pages, int num_pages)
1268{
1269 struct ceph_osd_request *req;
1270 int rc = 0;
1271
1272 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
1273 vino.snap, off, *plen);
1274 req = ceph_osdc_new_request(osdc, layout, vino, off, plen,
1275 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
1276 NULL, 0, truncate_seq, truncate_size, NULL,
1277 false, 1);
1278 if (IS_ERR(req))
1279 return PTR_ERR(req);
1280
1281 /* it may be a short read due to an object boundary */
1282 req->r_pages = pages;
1283 num_pages = calc_pages_for(off, *plen);
1284 req->r_num_pages = num_pages;
1285
1286 dout("readpages final extent is %llu~%llu (%d pages)\n",
1287 off, *plen, req->r_num_pages);
1288
1289 rc = ceph_osdc_start_request(osdc, req, false);
1290 if (!rc)
1291 rc = ceph_osdc_wait_request(osdc, req);
1292
1293 ceph_osdc_put_request(req);
1294 dout("readpages result %d\n", rc);
1295 return rc;
1296}
1297
1298/*
1299 * do a synchronous write on N pages
1300 */
1301int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
1302 struct ceph_file_layout *layout,
1303 struct ceph_snap_context *snapc,
1304 u64 off, u64 len,
1305 u32 truncate_seq, u64 truncate_size,
1306 struct timespec *mtime,
1307 struct page **pages, int num_pages,
1308 int flags, int do_sync, bool nofail)
1309{
1310 struct ceph_osd_request *req;
1311 int rc = 0;
1312
1313 BUG_ON(vino.snap != CEPH_NOSNAP);
1314 req = ceph_osdc_new_request(osdc, layout, vino, off, &len,
1315 CEPH_OSD_OP_WRITE,
1316 flags | CEPH_OSD_FLAG_ONDISK |
1317 CEPH_OSD_FLAG_WRITE,
1318 snapc, do_sync,
1319 truncate_seq, truncate_size, mtime,
1320 nofail, 1);
1321 if (IS_ERR(req))
1322 return PTR_ERR(req);
1323
1324 /* it may be a short write due to an object boundary */
1325 req->r_pages = pages;
1326 req->r_num_pages = calc_pages_for(off, len);
1327 dout("writepages %llu~%llu (%d pages)\n", off, len,
1328 req->r_num_pages);
1329
1330 rc = ceph_osdc_start_request(osdc, req, nofail);
1331 if (!rc)
1332 rc = ceph_osdc_wait_request(osdc, req);
1333
1334 ceph_osdc_put_request(req);
1335 if (rc == 0)
1336 rc = len;
1337 dout("writepages result %d\n", rc);
1338 return rc;
1339}
1340
1341/*
1342 * handle incoming message
1343 */
1344static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
1345{
1346 struct ceph_osd *osd = con->private;
1347 struct ceph_osd_client *osdc;
1348 int type = le16_to_cpu(msg->hdr.type);
1349
1350 if (!osd)
1351 return;
1352 osdc = osd->o_osdc;
1353
1354 switch (type) {
1355 case CEPH_MSG_OSD_MAP:
1356 ceph_osdc_handle_map(osdc, msg);
1357 break;
1358 case CEPH_MSG_OSD_OPREPLY:
1359 handle_reply(osdc, msg, con);
1360 break;
1361
1362 default:
1363 pr_err("received unknown message type %d %s\n", type,
1364 ceph_msg_type_name(type));
1365 }
1366 ceph_msg_put(msg);
1367}
1368
1369/*
1370 * lookup and return message for incoming reply
1371 */
1372static struct ceph_msg *get_reply(struct ceph_connection *con,
1373 struct ceph_msg_header *hdr,
1374 int *skip)
1375{
1376 struct ceph_osd *osd = con->private;
1377 struct ceph_osd_client *osdc = osd->o_osdc;
1378 struct ceph_msg *m;
1379 struct ceph_osd_request *req;
1380 int front = le32_to_cpu(hdr->front_len);
1381 int data_len = le32_to_cpu(hdr->data_len);
1382 u64 tid;
1383 int err;
1384
1385 tid = le64_to_cpu(hdr->tid);
1386 mutex_lock(&osdc->request_mutex);
1387 req = __lookup_request(osdc, tid);
1388 if (!req) {
1389 *skip = 1;
1390 m = NULL;
1391 pr_info("get_reply unknown tid %llu from osd%d\n", tid,
1392 osd->o_osd);
1393 goto out;
1394 }
1395
1396 if (req->r_con_filling_msg) {
1397 dout("get_reply revoking msg %p from old con %p\n",
1398 req->r_reply, req->r_con_filling_msg);
1399 ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply);
1400 ceph_con_put(req->r_con_filling_msg);
1401 }
1402
1403 if (front > req->r_reply->front.iov_len) {
1404 pr_warning("get_reply front %d > preallocated %d\n",
1405 front, (int)req->r_reply->front.iov_len);
1406 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, 0, 0, NULL);
1407 if (IS_ERR(m))
1408 goto out;
1409 ceph_msg_put(req->r_reply);
1410 req->r_reply = m;
1411 }
1412 m = ceph_msg_get(req->r_reply);
1413
1414 if (data_len > 0) {
1415 err = __prepare_pages(con, hdr, req, tid, m);
1416 if (err < 0) {
1417 *skip = 1;
1418 ceph_msg_put(m);
1419 m = ERR_PTR(err);
1420 }
1421 }
1422 *skip = 0;
1423 req->r_con_filling_msg = ceph_con_get(con);
1424 dout("get_reply tid %lld %p\n", tid, m);
1425
1426out:
1427 mutex_unlock(&osdc->request_mutex);
1428 return m;
1429
1430}
1431
1432static struct ceph_msg *alloc_msg(struct ceph_connection *con,
1433 struct ceph_msg_header *hdr,
1434 int *skip)
1435{
1436 struct ceph_osd *osd = con->private;
1437 int type = le16_to_cpu(hdr->type);
1438 int front = le32_to_cpu(hdr->front_len);
1439
1440 switch (type) {
1441 case CEPH_MSG_OSD_MAP:
1442 return ceph_msg_new(type, front, 0, 0, NULL);
1443 case CEPH_MSG_OSD_OPREPLY:
1444 return get_reply(con, hdr, skip);
1445 default:
1446 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
1447 osd->o_osd);
1448 *skip = 1;
1449 return NULL;
1450 }
1451}
1452
1453/*
1454 * Wrappers to refcount containing ceph_osd struct
1455 */
1456static struct ceph_connection *get_osd_con(struct ceph_connection *con)
1457{
1458 struct ceph_osd *osd = con->private;
1459 if (get_osd(osd))
1460 return con;
1461 return NULL;
1462}
1463
1464static void put_osd_con(struct ceph_connection *con)
1465{
1466 struct ceph_osd *osd = con->private;
1467 put_osd(osd);
1468}
1469
1470/*
1471 * authentication
1472 */
1473static int get_authorizer(struct ceph_connection *con,
1474 void **buf, int *len, int *proto,
1475 void **reply_buf, int *reply_len, int force_new)
1476{
1477 struct ceph_osd *o = con->private;
1478 struct ceph_osd_client *osdc = o->o_osdc;
1479 struct ceph_auth_client *ac = osdc->client->monc.auth;
1480 int ret = 0;
1481
1482 if (force_new && o->o_authorizer) {
1483 ac->ops->destroy_authorizer(ac, o->o_authorizer);
1484 o->o_authorizer = NULL;
1485 }
1486 if (o->o_authorizer == NULL) {
1487 ret = ac->ops->create_authorizer(
1488 ac, CEPH_ENTITY_TYPE_OSD,
1489 &o->o_authorizer,
1490 &o->o_authorizer_buf,
1491 &o->o_authorizer_buf_len,
1492 &o->o_authorizer_reply_buf,
1493 &o->o_authorizer_reply_buf_len);
1494 if (ret)
1495 return ret;
1496 }
1497
1498 *proto = ac->protocol;
1499 *buf = o->o_authorizer_buf;
1500 *len = o->o_authorizer_buf_len;
1501 *reply_buf = o->o_authorizer_reply_buf;
1502 *reply_len = o->o_authorizer_reply_buf_len;
1503 return 0;
1504}
1505
1506
1507static int verify_authorizer_reply(struct ceph_connection *con, int len)
1508{
1509 struct ceph_osd *o = con->private;
1510 struct ceph_osd_client *osdc = o->o_osdc;
1511 struct ceph_auth_client *ac = osdc->client->monc.auth;
1512
1513 return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len);
1514}
1515
1516static int invalidate_authorizer(struct ceph_connection *con)
1517{
1518 struct ceph_osd *o = con->private;
1519 struct ceph_osd_client *osdc = o->o_osdc;
1520 struct ceph_auth_client *ac = osdc->client->monc.auth;
1521
1522 if (ac->ops->invalidate_authorizer)
1523 ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
1524
1525 return ceph_monc_validate_auth(&osdc->client->monc);
1526}
1527
1528const static struct ceph_connection_operations osd_con_ops = {
1529 .get = get_osd_con,
1530 .put = put_osd_con,
1531 .dispatch = dispatch,
1532 .get_authorizer = get_authorizer,
1533 .verify_authorizer_reply = verify_authorizer_reply,
1534 .invalidate_authorizer = invalidate_authorizer,
1535 .alloc_msg = alloc_msg,
1536 .fault = osd_reset,
1537};
generated by cgit v1.2.2 (git 2.25.0) at 2025-05-16 19:02:44 -0400