blob: d639c74e749f399d00d63f0fb440dabcba51bd55 [file] [log] [blame]
Sage Weilf24e9982009-10-06 11:31:10 -07001#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"
Sage Weil4e7a5dc2009-11-18 16:19:57 -080014#include "auth.h"
Sage Weilf24e9982009-10-06 11:31:10 -070015
16const static struct ceph_connection_operations osd_con_ops;
17
18static void kick_requests(struct ceph_osd_client *osdc, struct ceph_osd *osd);
19
20/*
21 * Implement client access to distributed object storage cluster.
22 *
23 * All data objects are stored within a cluster/cloud of OSDs, or
24 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
25 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
26 * remote daemons serving up and coordinating consistent and safe
27 * access to storage.
28 *
29 * Cluster membership and the mapping of data objects onto storage devices
30 * are described by the osd map.
31 *
32 * We keep track of pending OSD requests (read, write), resubmit
33 * requests to different OSDs when the cluster topology/data layout
34 * change, or retry the affected requests when the communications
35 * channel with an OSD is reset.
36 */
37
38/*
39 * calculate the mapping of a file extent onto an object, and fill out the
40 * request accordingly. shorten extent as necessary if it crosses an
41 * object boundary.
42 *
43 * fill osd op in request message.
44 */
45static void calc_layout(struct ceph_osd_client *osdc,
46 struct ceph_vino vino, struct ceph_file_layout *layout,
47 u64 off, u64 *plen,
48 struct ceph_osd_request *req)
49{
50 struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
51 struct ceph_osd_op *op = (void *)(reqhead + 1);
52 u64 orig_len = *plen;
53 u64 objoff, objlen; /* extent in object */
54 u64 bno;
55
56 reqhead->snapid = cpu_to_le64(vino.snap);
57
58 /* object extent? */
59 ceph_calc_file_object_mapping(layout, off, plen, &bno,
60 &objoff, &objlen);
61 if (*plen < orig_len)
62 dout(" skipping last %llu, final file extent %llu~%llu\n",
63 orig_len - *plen, off, *plen);
64
65 sprintf(req->r_oid, "%llx.%08llx", vino.ino, bno);
66 req->r_oid_len = strlen(req->r_oid);
67
68 op->extent.offset = cpu_to_le64(objoff);
69 op->extent.length = cpu_to_le64(objlen);
70 req->r_num_pages = calc_pages_for(off, *plen);
71
72 dout("calc_layout %s (%d) %llu~%llu (%d pages)\n",
73 req->r_oid, req->r_oid_len, objoff, objlen, req->r_num_pages);
74}
75
76
77/*
78 * requests
79 */
80void ceph_osdc_put_request(struct ceph_osd_request *req)
81{
82 dout("osdc put_request %p %d -> %d\n", req, atomic_read(&req->r_ref),
83 atomic_read(&req->r_ref)-1);
84 BUG_ON(atomic_read(&req->r_ref) <= 0);
85 if (atomic_dec_and_test(&req->r_ref)) {
86 if (req->r_request)
87 ceph_msg_put(req->r_request);
88 if (req->r_reply)
89 ceph_msg_put(req->r_reply);
90 if (req->r_own_pages)
91 ceph_release_page_vector(req->r_pages,
92 req->r_num_pages);
93 ceph_put_snap_context(req->r_snapc);
94 if (req->r_mempool)
95 mempool_free(req, req->r_osdc->req_mempool);
96 else
97 kfree(req);
98 }
99}
100
101/*
102 * build new request AND message, calculate layout, and adjust file
103 * extent as needed.
104 *
105 * if the file was recently truncated, we include information about its
106 * old and new size so that the object can be updated appropriately. (we
107 * avoid synchronously deleting truncated objects because it's slow.)
108 *
109 * if @do_sync, include a 'startsync' command so that the osd will flush
110 * data quickly.
111 */
112struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
113 struct ceph_file_layout *layout,
114 struct ceph_vino vino,
115 u64 off, u64 *plen,
116 int opcode, int flags,
117 struct ceph_snap_context *snapc,
118 int do_sync,
119 u32 truncate_seq,
120 u64 truncate_size,
121 struct timespec *mtime,
122 bool use_mempool, int num_reply)
123{
124 struct ceph_osd_request *req;
125 struct ceph_msg *msg;
126 struct ceph_osd_request_head *head;
127 struct ceph_osd_op *op;
128 void *p;
129 int do_trunc = truncate_seq && (off + *plen > truncate_size);
130 int num_op = 1 + do_sync + do_trunc;
131 size_t msg_size = sizeof(*head) + num_op*sizeof(*op);
132 int err, i;
133 u64 prevofs;
134
135 if (use_mempool) {
136 req = mempool_alloc(osdc->req_mempool, GFP_NOFS);
137 memset(req, 0, sizeof(*req));
138 } else {
139 req = kzalloc(sizeof(*req), GFP_NOFS);
140 }
141 if (req == NULL)
142 return ERR_PTR(-ENOMEM);
143
144 err = ceph_msgpool_resv(&osdc->msgpool_op_reply, num_reply);
145 if (err) {
146 ceph_osdc_put_request(req);
147 return ERR_PTR(-ENOMEM);
148 }
149
150 req->r_osdc = osdc;
151 req->r_mempool = use_mempool;
152 atomic_set(&req->r_ref, 1);
153 init_completion(&req->r_completion);
154 init_completion(&req->r_safe_completion);
155 INIT_LIST_HEAD(&req->r_unsafe_item);
156 req->r_flags = flags;
157
158 WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0);
159
160 /* create message; allow space for oid */
161 msg_size += 40;
162 if (snapc)
163 msg_size += sizeof(u64) * snapc->num_snaps;
164 if (use_mempool)
Sage Weil8f3bc052009-10-14 17:36:07 -0700165 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
Sage Weilf24e9982009-10-06 11:31:10 -0700166 else
167 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, 0, 0, NULL);
168 if (IS_ERR(msg)) {
169 ceph_msgpool_resv(&osdc->msgpool_op_reply, num_reply);
170 ceph_osdc_put_request(req);
171 return ERR_PTR(PTR_ERR(msg));
172 }
173 msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP);
174 memset(msg->front.iov_base, 0, msg->front.iov_len);
175 head = msg->front.iov_base;
176 op = (void *)(head + 1);
177 p = (void *)(op + num_op);
178
179 req->r_request = msg;
180 req->r_snapc = ceph_get_snap_context(snapc);
181
182 head->client_inc = cpu_to_le32(1); /* always, for now. */
183 head->flags = cpu_to_le32(flags);
184 if (flags & CEPH_OSD_FLAG_WRITE)
185 ceph_encode_timespec(&head->mtime, mtime);
186 head->num_ops = cpu_to_le16(num_op);
187 op->op = cpu_to_le16(opcode);
188
189 /* calculate max write size */
190 calc_layout(osdc, vino, layout, off, plen, req);
191 req->r_file_layout = *layout; /* keep a copy */
192
193 if (flags & CEPH_OSD_FLAG_WRITE) {
194 req->r_request->hdr.data_off = cpu_to_le16(off);
195 req->r_request->hdr.data_len = cpu_to_le32(*plen);
196 op->payload_len = cpu_to_le32(*plen);
197 }
198
199 /* fill in oid */
200 head->object_len = cpu_to_le32(req->r_oid_len);
201 memcpy(p, req->r_oid, req->r_oid_len);
202 p += req->r_oid_len;
203
204 /* additional ops */
205 if (do_trunc) {
206 op++;
207 op->op = cpu_to_le16(opcode == CEPH_OSD_OP_READ ?
208 CEPH_OSD_OP_MASKTRUNC : CEPH_OSD_OP_SETTRUNC);
209 op->trunc.truncate_seq = cpu_to_le32(truncate_seq);
210 prevofs = le64_to_cpu((op-1)->extent.offset);
211 op->trunc.truncate_size = cpu_to_le64(truncate_size -
212 (off-prevofs));
213 }
214 if (do_sync) {
215 op++;
216 op->op = cpu_to_le16(CEPH_OSD_OP_STARTSYNC);
217 }
218 if (snapc) {
219 head->snap_seq = cpu_to_le64(snapc->seq);
220 head->num_snaps = cpu_to_le32(snapc->num_snaps);
221 for (i = 0; i < snapc->num_snaps; i++) {
222 put_unaligned_le64(snapc->snaps[i], p);
223 p += sizeof(u64);
224 }
225 }
226
227 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
228 return req;
229}
230
231/*
232 * We keep osd requests in an rbtree, sorted by ->r_tid.
233 */
234static void __insert_request(struct ceph_osd_client *osdc,
235 struct ceph_osd_request *new)
236{
237 struct rb_node **p = &osdc->requests.rb_node;
238 struct rb_node *parent = NULL;
239 struct ceph_osd_request *req = NULL;
240
241 while (*p) {
242 parent = *p;
243 req = rb_entry(parent, struct ceph_osd_request, r_node);
244 if (new->r_tid < req->r_tid)
245 p = &(*p)->rb_left;
246 else if (new->r_tid > req->r_tid)
247 p = &(*p)->rb_right;
248 else
249 BUG();
250 }
251
252 rb_link_node(&new->r_node, parent, p);
253 rb_insert_color(&new->r_node, &osdc->requests);
254}
255
256static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
257 u64 tid)
258{
259 struct ceph_osd_request *req;
260 struct rb_node *n = osdc->requests.rb_node;
261
262 while (n) {
263 req = rb_entry(n, struct ceph_osd_request, r_node);
264 if (tid < req->r_tid)
265 n = n->rb_left;
266 else if (tid > req->r_tid)
267 n = n->rb_right;
268 else
269 return req;
270 }
271 return NULL;
272}
273
274static struct ceph_osd_request *
275__lookup_request_ge(struct ceph_osd_client *osdc,
276 u64 tid)
277{
278 struct ceph_osd_request *req;
279 struct rb_node *n = osdc->requests.rb_node;
280
281 while (n) {
282 req = rb_entry(n, struct ceph_osd_request, r_node);
283 if (tid < req->r_tid) {
284 if (!n->rb_left)
285 return req;
286 n = n->rb_left;
287 } else if (tid > req->r_tid) {
288 n = n->rb_right;
289 } else {
290 return req;
291 }
292 }
293 return NULL;
294}
295
296
297/*
Sage Weil81b024e2009-10-09 10:29:18 -0700298 * If the osd connection drops, we need to resubmit all requests.
Sage Weilf24e9982009-10-06 11:31:10 -0700299 */
300static void osd_reset(struct ceph_connection *con)
301{
302 struct ceph_osd *osd = con->private;
303 struct ceph_osd_client *osdc;
304
305 if (!osd)
306 return;
307 dout("osd_reset osd%d\n", osd->o_osd);
308 osdc = osd->o_osdc;
309 osd->o_incarnation++;
310 down_read(&osdc->map_sem);
311 kick_requests(osdc, osd);
312 up_read(&osdc->map_sem);
313}
314
315/*
316 * Track open sessions with osds.
317 */
318static struct ceph_osd *create_osd(struct ceph_osd_client *osdc)
319{
320 struct ceph_osd *osd;
321
322 osd = kzalloc(sizeof(*osd), GFP_NOFS);
323 if (!osd)
324 return NULL;
325
326 atomic_set(&osd->o_ref, 1);
327 osd->o_osdc = osdc;
328 INIT_LIST_HEAD(&osd->o_requests);
329 osd->o_incarnation = 1;
330
331 ceph_con_init(osdc->client->msgr, &osd->o_con);
332 osd->o_con.private = osd;
333 osd->o_con.ops = &osd_con_ops;
334 osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD;
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800335
Sage Weilf24e9982009-10-06 11:31:10 -0700336 return osd;
337}
338
339static struct ceph_osd *get_osd(struct ceph_osd *osd)
340{
341 if (atomic_inc_not_zero(&osd->o_ref)) {
342 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
343 atomic_read(&osd->o_ref));
344 return osd;
345 } else {
346 dout("get_osd %p FAIL\n", osd);
347 return NULL;
348 }
349}
350
351static void put_osd(struct ceph_osd *osd)
352{
353 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
354 atomic_read(&osd->o_ref) - 1);
Sage Weil42ce56e2009-11-18 11:22:36 -0800355 if (atomic_dec_and_test(&osd->o_ref))
Sage Weilf24e9982009-10-06 11:31:10 -0700356 kfree(osd);
Sage Weilf24e9982009-10-06 11:31:10 -0700357}
358
359/*
360 * remove an osd from our map
361 */
362static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
363{
364 dout("remove_osd %p\n", osd);
365 BUG_ON(!list_empty(&osd->o_requests));
366 rb_erase(&osd->o_node, &osdc->osds);
367 ceph_con_close(&osd->o_con);
368 put_osd(osd);
369}
370
371/*
372 * reset osd connect
373 */
374static int reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
375{
376 int ret = 0;
377
378 dout("reset_osd %p osd%d\n", osd, osd->o_osd);
379 if (list_empty(&osd->o_requests)) {
380 remove_osd(osdc, osd);
381 } else {
382 ceph_con_close(&osd->o_con);
383 ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]);
384 osd->o_incarnation++;
385 }
386 return ret;
387}
388
389static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
390{
391 struct rb_node **p = &osdc->osds.rb_node;
392 struct rb_node *parent = NULL;
393 struct ceph_osd *osd = NULL;
394
395 while (*p) {
396 parent = *p;
397 osd = rb_entry(parent, struct ceph_osd, o_node);
398 if (new->o_osd < osd->o_osd)
399 p = &(*p)->rb_left;
400 else if (new->o_osd > osd->o_osd)
401 p = &(*p)->rb_right;
402 else
403 BUG();
404 }
405
406 rb_link_node(&new->o_node, parent, p);
407 rb_insert_color(&new->o_node, &osdc->osds);
408}
409
410static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
411{
412 struct ceph_osd *osd;
413 struct rb_node *n = osdc->osds.rb_node;
414
415 while (n) {
416 osd = rb_entry(n, struct ceph_osd, o_node);
417 if (o < osd->o_osd)
418 n = n->rb_left;
419 else if (o > osd->o_osd)
420 n = n->rb_right;
421 else
422 return osd;
423 }
424 return NULL;
425}
426
427
428/*
429 * Register request, assign tid. If this is the first request, set up
430 * the timeout event.
431 */
432static void register_request(struct ceph_osd_client *osdc,
433 struct ceph_osd_request *req)
434{
435 struct ceph_osd_request_head *head = req->r_request->front.iov_base;
436
437 mutex_lock(&osdc->request_mutex);
438 req->r_tid = ++osdc->last_tid;
439 head->tid = cpu_to_le64(req->r_tid);
440
441 dout("register_request %p tid %lld\n", req, req->r_tid);
442 __insert_request(osdc, req);
443 ceph_osdc_get_request(req);
444 osdc->num_requests++;
445
446 req->r_timeout_stamp =
Sage Weil6b805182009-10-27 11:50:50 -0700447 jiffies + osdc->client->mount_args->osd_timeout*HZ;
Sage Weilf24e9982009-10-06 11:31:10 -0700448
449 if (osdc->num_requests == 1) {
450 osdc->timeout_tid = req->r_tid;
451 dout(" timeout on tid %llu at %lu\n", req->r_tid,
452 req->r_timeout_stamp);
453 schedule_delayed_work(&osdc->timeout_work,
454 round_jiffies_relative(req->r_timeout_stamp - jiffies));
455 }
456 mutex_unlock(&osdc->request_mutex);
457}
458
459/*
460 * called under osdc->request_mutex
461 */
462static void __unregister_request(struct ceph_osd_client *osdc,
463 struct ceph_osd_request *req)
464{
465 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
466 rb_erase(&req->r_node, &osdc->requests);
467 osdc->num_requests--;
468
Sage Weil0ba64782009-10-08 16:57:16 -0700469 if (req->r_osd) {
470 /* make sure the original request isn't in flight. */
471 ceph_con_revoke(&req->r_osd->o_con, req->r_request);
472
473 list_del_init(&req->r_osd_item);
474 if (list_empty(&req->r_osd->o_requests))
475 remove_osd(osdc, req->r_osd);
476 req->r_osd = NULL;
477 }
Sage Weilf24e9982009-10-06 11:31:10 -0700478
479 ceph_osdc_put_request(req);
480
481 if (req->r_tid == osdc->timeout_tid) {
482 if (osdc->num_requests == 0) {
483 dout("no requests, canceling timeout\n");
484 osdc->timeout_tid = 0;
485 cancel_delayed_work(&osdc->timeout_work);
486 } else {
487 req = rb_entry(rb_first(&osdc->requests),
488 struct ceph_osd_request, r_node);
489 osdc->timeout_tid = req->r_tid;
490 dout("rescheduled timeout on tid %llu at %lu\n",
491 req->r_tid, req->r_timeout_stamp);
492 schedule_delayed_work(&osdc->timeout_work,
493 round_jiffies_relative(req->r_timeout_stamp -
494 jiffies));
495 }
496 }
497}
498
499/*
500 * Cancel a previously queued request message
501 */
502static void __cancel_request(struct ceph_osd_request *req)
503{
504 if (req->r_sent) {
505 ceph_con_revoke(&req->r_osd->o_con, req->r_request);
506 req->r_sent = 0;
507 }
508}
509
510/*
511 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
512 * (as needed), and set the request r_osd appropriately. If there is
513 * no up osd, set r_osd to NULL.
514 *
515 * Return 0 if unchanged, 1 if changed, or negative on error.
516 *
517 * Caller should hold map_sem for read and request_mutex.
518 */
519static int __map_osds(struct ceph_osd_client *osdc,
520 struct ceph_osd_request *req)
521{
522 struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
Sage Weil51042122009-11-04 11:39:12 -0800523 struct ceph_pg pgid;
Sage Weilf24e9982009-10-06 11:31:10 -0700524 int o = -1;
525 int err;
526 struct ceph_osd *newosd = NULL;
527
528 dout("map_osds %p tid %lld\n", req, req->r_tid);
529 err = ceph_calc_object_layout(&reqhead->layout, req->r_oid,
530 &req->r_file_layout, osdc->osdmap);
531 if (err)
532 return err;
Sage Weil51042122009-11-04 11:39:12 -0800533 pgid = reqhead->layout.ol_pgid;
Sage Weilf24e9982009-10-06 11:31:10 -0700534 o = ceph_calc_pg_primary(osdc->osdmap, pgid);
535
536 if ((req->r_osd && req->r_osd->o_osd == o &&
537 req->r_sent >= req->r_osd->o_incarnation) ||
538 (req->r_osd == NULL && o == -1))
539 return 0; /* no change */
540
Sage Weil51042122009-11-04 11:39:12 -0800541 dout("map_osds tid %llu pgid %d.%x osd%d (was osd%d)\n",
542 req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o,
Sage Weilf24e9982009-10-06 11:31:10 -0700543 req->r_osd ? req->r_osd->o_osd : -1);
544
545 if (req->r_osd) {
546 __cancel_request(req);
547 list_del_init(&req->r_osd_item);
548 if (list_empty(&req->r_osd->o_requests)) {
549 /* try to re-use r_osd if possible */
550 newosd = get_osd(req->r_osd);
551 remove_osd(osdc, newosd);
552 }
553 req->r_osd = NULL;
554 }
555
556 req->r_osd = __lookup_osd(osdc, o);
557 if (!req->r_osd && o >= 0) {
558 if (newosd) {
559 req->r_osd = newosd;
560 newosd = NULL;
561 } else {
562 err = -ENOMEM;
563 req->r_osd = create_osd(osdc);
564 if (!req->r_osd)
565 goto out;
566 }
567
568 dout("map_osds osd %p is osd%d\n", req->r_osd, o);
569 req->r_osd->o_osd = o;
570 req->r_osd->o_con.peer_name.num = cpu_to_le64(o);
571 __insert_osd(osdc, req->r_osd);
572
573 ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]);
574 }
575
576 if (req->r_osd)
577 list_add(&req->r_osd_item, &req->r_osd->o_requests);
578 err = 1; /* osd changed */
579
580out:
581 if (newosd)
582 put_osd(newosd);
583 return err;
584}
585
586/*
587 * caller should hold map_sem (for read) and request_mutex
588 */
589static int __send_request(struct ceph_osd_client *osdc,
590 struct ceph_osd_request *req)
591{
592 struct ceph_osd_request_head *reqhead;
593 int err;
594
595 err = __map_osds(osdc, req);
596 if (err < 0)
597 return err;
598 if (req->r_osd == NULL) {
599 dout("send_request %p no up osds in pg\n", req);
600 ceph_monc_request_next_osdmap(&osdc->client->monc);
601 return 0;
602 }
603
604 dout("send_request %p tid %llu to osd%d flags %d\n",
605 req, req->r_tid, req->r_osd->o_osd, req->r_flags);
606
607 reqhead = req->r_request->front.iov_base;
608 reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch);
609 reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */
610 reqhead->reassert_version = req->r_reassert_version;
611
Sage Weil6b805182009-10-27 11:50:50 -0700612 req->r_timeout_stamp = jiffies+osdc->client->mount_args->osd_timeout*HZ;
Sage Weilf24e9982009-10-06 11:31:10 -0700613
614 ceph_msg_get(req->r_request); /* send consumes a ref */
615 ceph_con_send(&req->r_osd->o_con, req->r_request);
616 req->r_sent = req->r_osd->o_incarnation;
617 return 0;
618}
619
620/*
621 * Timeout callback, called every N seconds when 1 or more osd
622 * requests has been active for more than N seconds. When this
623 * happens, we ping all OSDs with requests who have timed out to
624 * ensure any communications channel reset is detected. Reset the
625 * request timeouts another N seconds in the future as we go.
626 * Reschedule the timeout event another N seconds in future (unless
627 * there are no open requests).
628 */
629static void handle_timeout(struct work_struct *work)
630{
631 struct ceph_osd_client *osdc =
632 container_of(work, struct ceph_osd_client, timeout_work.work);
633 struct ceph_osd_request *req;
634 struct ceph_osd *osd;
Sage Weil6b805182009-10-27 11:50:50 -0700635 unsigned long timeout = osdc->client->mount_args->osd_timeout * HZ;
Sage Weilf24e9982009-10-06 11:31:10 -0700636 unsigned long next_timeout = timeout + jiffies;
637 struct rb_node *p;
638
639 dout("timeout\n");
640 down_read(&osdc->map_sem);
641
642 ceph_monc_request_next_osdmap(&osdc->client->monc);
643
644 mutex_lock(&osdc->request_mutex);
645 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
646 req = rb_entry(p, struct ceph_osd_request, r_node);
647
648 if (req->r_resend) {
649 int err;
650
651 dout("osdc resending prev failed %lld\n", req->r_tid);
652 err = __send_request(osdc, req);
653 if (err)
654 dout("osdc failed again on %lld\n", req->r_tid);
655 else
656 req->r_resend = false;
657 continue;
658 }
659 }
660 for (p = rb_first(&osdc->osds); p; p = rb_next(p)) {
661 osd = rb_entry(p, struct ceph_osd, o_node);
662 if (list_empty(&osd->o_requests))
663 continue;
664 req = list_first_entry(&osd->o_requests,
665 struct ceph_osd_request, r_osd_item);
666 if (time_before(jiffies, req->r_timeout_stamp))
667 continue;
668
669 dout(" tid %llu (at least) timed out on osd%d\n",
670 req->r_tid, osd->o_osd);
671 req->r_timeout_stamp = next_timeout;
672 ceph_con_keepalive(&osd->o_con);
673 }
674
675 if (osdc->timeout_tid)
676 schedule_delayed_work(&osdc->timeout_work,
677 round_jiffies_relative(timeout));
678
679 mutex_unlock(&osdc->request_mutex);
680
681 up_read(&osdc->map_sem);
682}
683
684/*
685 * handle osd op reply. either call the callback if it is specified,
686 * or do the completion to wake up the waiting thread.
687 */
688static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg)
689{
690 struct ceph_osd_reply_head *rhead = msg->front.iov_base;
691 struct ceph_osd_request *req;
692 u64 tid;
693 int numops, object_len, flags;
694
695 if (msg->front.iov_len < sizeof(*rhead))
696 goto bad;
697 tid = le64_to_cpu(rhead->tid);
698 numops = le32_to_cpu(rhead->num_ops);
699 object_len = le32_to_cpu(rhead->object_len);
700 if (msg->front.iov_len != sizeof(*rhead) + object_len +
701 numops * sizeof(struct ceph_osd_op))
702 goto bad;
703 dout("handle_reply %p tid %llu\n", msg, tid);
704
705 /* lookup */
706 mutex_lock(&osdc->request_mutex);
707 req = __lookup_request(osdc, tid);
708 if (req == NULL) {
709 dout("handle_reply tid %llu dne\n", tid);
710 mutex_unlock(&osdc->request_mutex);
711 return;
712 }
713 ceph_osdc_get_request(req);
714 flags = le32_to_cpu(rhead->flags);
715
716 if (req->r_reply) {
717 /*
718 * once we see the message has been received, we don't
719 * need a ref (which is only needed for revoking
720 * pages)
721 */
722 ceph_msg_put(req->r_reply);
723 req->r_reply = NULL;
724 }
725
726 if (!req->r_got_reply) {
727 unsigned bytes;
728
729 req->r_result = le32_to_cpu(rhead->result);
730 bytes = le32_to_cpu(msg->hdr.data_len);
731 dout("handle_reply result %d bytes %d\n", req->r_result,
732 bytes);
733 if (req->r_result == 0)
734 req->r_result = bytes;
735
736 /* in case this is a write and we need to replay, */
737 req->r_reassert_version = rhead->reassert_version;
738
739 req->r_got_reply = 1;
740 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
741 dout("handle_reply tid %llu dup ack\n", tid);
Sage Weil34b43a52009-12-01 12:23:54 -0800742 mutex_unlock(&osdc->request_mutex);
Sage Weilf24e9982009-10-06 11:31:10 -0700743 goto done;
744 }
745
746 dout("handle_reply tid %llu flags %d\n", tid, flags);
747
748 /* either this is a read, or we got the safe response */
749 if ((flags & CEPH_OSD_FLAG_ONDISK) ||
750 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
751 __unregister_request(osdc, req);
752
753 mutex_unlock(&osdc->request_mutex);
754
755 if (req->r_callback)
756 req->r_callback(req, msg);
757 else
758 complete(&req->r_completion);
759
760 if (flags & CEPH_OSD_FLAG_ONDISK) {
761 if (req->r_safe_callback)
762 req->r_safe_callback(req, msg);
763 complete(&req->r_safe_completion); /* fsync waiter */
764 }
765
766done:
767 ceph_osdc_put_request(req);
768 return;
769
770bad:
771 pr_err("corrupt osd_op_reply got %d %d expected %d\n",
772 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len),
773 (int)sizeof(*rhead));
774}
775
776
777/*
778 * Resubmit osd requests whose osd or osd address has changed. Request
779 * a new osd map if osds are down, or we are otherwise unable to determine
780 * how to direct a request.
781 *
782 * Close connections to down osds.
783 *
784 * If @who is specified, resubmit requests for that specific osd.
785 *
786 * Caller should hold map_sem for read and request_mutex.
787 */
788static void kick_requests(struct ceph_osd_client *osdc,
789 struct ceph_osd *kickosd)
790{
791 struct ceph_osd_request *req;
792 struct rb_node *p, *n;
793 int needmap = 0;
794 int err;
795
796 dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1);
797 mutex_lock(&osdc->request_mutex);
798 if (!kickosd) {
799 for (p = rb_first(&osdc->osds); p; p = n) {
800 struct ceph_osd *osd =
801 rb_entry(p, struct ceph_osd, o_node);
802
803 n = rb_next(p);
804 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
805 !ceph_entity_addr_equal(&osd->o_con.peer_addr,
806 ceph_osd_addr(osdc->osdmap,
807 osd->o_osd)))
808 reset_osd(osdc, osd);
809 }
810 }
811
812 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
813 req = rb_entry(p, struct ceph_osd_request, r_node);
814
815 if (req->r_resend) {
816 dout(" r_resend set on tid %llu\n", req->r_tid);
Sage Weil266673d2009-10-09 10:31:32 -0700817 __cancel_request(req);
Sage Weilf24e9982009-10-06 11:31:10 -0700818 goto kick;
819 }
Sage Weil266673d2009-10-09 10:31:32 -0700820 if (req->r_osd && kickosd == req->r_osd) {
821 __cancel_request(req);
Sage Weilf24e9982009-10-06 11:31:10 -0700822 goto kick;
Sage Weil266673d2009-10-09 10:31:32 -0700823 }
Sage Weilf24e9982009-10-06 11:31:10 -0700824
825 err = __map_osds(osdc, req);
826 if (err == 0)
827 continue; /* no change */
828 if (err < 0) {
829 /*
830 * FIXME: really, we should set the request
831 * error and fail if this isn't a 'nofail'
832 * request, but that's a fair bit more
833 * complicated to do. So retry!
834 */
835 dout(" setting r_resend on %llu\n", req->r_tid);
836 req->r_resend = true;
837 continue;
838 }
839 if (req->r_osd == NULL) {
840 dout("tid %llu maps to no valid osd\n", req->r_tid);
841 needmap++; /* request a newer map */
842 continue;
843 }
844
845kick:
Sage Weilc1ea8822009-10-08 16:55:47 -0700846 dout("kicking %p tid %llu osd%d\n", req, req->r_tid,
847 req->r_osd->o_osd);
Sage Weilf24e9982009-10-06 11:31:10 -0700848 req->r_flags |= CEPH_OSD_FLAG_RETRY;
849 err = __send_request(osdc, req);
850 if (err) {
851 dout(" setting r_resend on %llu\n", req->r_tid);
852 req->r_resend = true;
853 }
854 }
855 mutex_unlock(&osdc->request_mutex);
856
857 if (needmap) {
858 dout("%d requests for down osds, need new map\n", needmap);
859 ceph_monc_request_next_osdmap(&osdc->client->monc);
860 }
861}
862
863/*
864 * Process updated osd map.
865 *
866 * The message contains any number of incremental and full maps, normally
867 * indicating some sort of topology change in the cluster. Kick requests
868 * off to different OSDs as needed.
869 */
870void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
871{
872 void *p, *end, *next;
873 u32 nr_maps, maplen;
874 u32 epoch;
875 struct ceph_osdmap *newmap = NULL, *oldmap;
876 int err;
877 struct ceph_fsid fsid;
878
879 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
880 p = msg->front.iov_base;
881 end = p + msg->front.iov_len;
882
883 /* verify fsid */
884 ceph_decode_need(&p, end, sizeof(fsid), bad);
885 ceph_decode_copy(&p, &fsid, sizeof(fsid));
Sage Weil07433042009-11-18 16:50:41 -0800886 if (ceph_check_fsid(osdc->client, &fsid) < 0)
887 return;
Sage Weilf24e9982009-10-06 11:31:10 -0700888
889 down_write(&osdc->map_sem);
890
891 /* incremental maps */
892 ceph_decode_32_safe(&p, end, nr_maps, bad);
893 dout(" %d inc maps\n", nr_maps);
894 while (nr_maps > 0) {
895 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
Sage Weilc89136e2009-10-14 09:59:09 -0700896 epoch = ceph_decode_32(&p);
897 maplen = ceph_decode_32(&p);
Sage Weilf24e9982009-10-06 11:31:10 -0700898 ceph_decode_need(&p, end, maplen, bad);
899 next = p + maplen;
900 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
901 dout("applying incremental map %u len %d\n",
902 epoch, maplen);
903 newmap = osdmap_apply_incremental(&p, next,
904 osdc->osdmap,
905 osdc->client->msgr);
906 if (IS_ERR(newmap)) {
907 err = PTR_ERR(newmap);
908 goto bad;
909 }
910 if (newmap != osdc->osdmap) {
911 ceph_osdmap_destroy(osdc->osdmap);
912 osdc->osdmap = newmap;
913 }
914 } else {
915 dout("ignoring incremental map %u len %d\n",
916 epoch, maplen);
917 }
918 p = next;
919 nr_maps--;
920 }
921 if (newmap)
922 goto done;
923
924 /* full maps */
925 ceph_decode_32_safe(&p, end, nr_maps, bad);
926 dout(" %d full maps\n", nr_maps);
927 while (nr_maps) {
928 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
Sage Weilc89136e2009-10-14 09:59:09 -0700929 epoch = ceph_decode_32(&p);
930 maplen = ceph_decode_32(&p);
Sage Weilf24e9982009-10-06 11:31:10 -0700931 ceph_decode_need(&p, end, maplen, bad);
932 if (nr_maps > 1) {
933 dout("skipping non-latest full map %u len %d\n",
934 epoch, maplen);
935 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
936 dout("skipping full map %u len %d, "
937 "older than our %u\n", epoch, maplen,
938 osdc->osdmap->epoch);
939 } else {
940 dout("taking full map %u len %d\n", epoch, maplen);
941 newmap = osdmap_decode(&p, p+maplen);
942 if (IS_ERR(newmap)) {
943 err = PTR_ERR(newmap);
944 goto bad;
945 }
946 oldmap = osdc->osdmap;
947 osdc->osdmap = newmap;
948 if (oldmap)
949 ceph_osdmap_destroy(oldmap);
950 }
951 p += maplen;
952 nr_maps--;
953 }
954
955done:
956 downgrade_write(&osdc->map_sem);
957 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
958 if (newmap)
959 kick_requests(osdc, NULL);
960 up_read(&osdc->map_sem);
961 return;
962
963bad:
964 pr_err("osdc handle_map corrupt msg\n");
965 up_write(&osdc->map_sem);
966 return;
967}
968
969
970/*
971 * A read request prepares specific pages that data is to be read into.
972 * When a message is being read off the wire, we call prepare_pages to
973 * find those pages.
974 * 0 = success, -1 failure.
975 */
976static int prepare_pages(struct ceph_connection *con, struct ceph_msg *m,
977 int want)
978{
979 struct ceph_osd *osd = con->private;
980 struct ceph_osd_client *osdc;
981 struct ceph_osd_reply_head *rhead = m->front.iov_base;
982 struct ceph_osd_request *req;
983 u64 tid;
984 int ret = -1;
985 int type = le16_to_cpu(m->hdr.type);
986
987 if (!osd)
988 return -1;
989 osdc = osd->o_osdc;
990
991 dout("prepare_pages on msg %p want %d\n", m, want);
992 if (unlikely(type != CEPH_MSG_OSD_OPREPLY))
993 return -1; /* hmm! */
994
995 tid = le64_to_cpu(rhead->tid);
996 mutex_lock(&osdc->request_mutex);
997 req = __lookup_request(osdc, tid);
998 if (!req) {
999 dout("prepare_pages unknown tid %llu\n", tid);
1000 goto out;
1001 }
1002 dout("prepare_pages tid %llu has %d pages, want %d\n",
1003 tid, req->r_num_pages, want);
1004 if (likely(req->r_num_pages >= want && !req->r_prepared_pages)) {
1005 m->pages = req->r_pages;
1006 m->nr_pages = req->r_num_pages;
1007 req->r_reply = m; /* only for duration of read over socket */
1008 ceph_msg_get(m);
1009 req->r_prepared_pages = 1;
1010 ret = 0; /* success */
1011 }
1012out:
1013 mutex_unlock(&osdc->request_mutex);
1014 return ret;
1015}
1016
1017/*
1018 * Register request, send initial attempt.
1019 */
1020int ceph_osdc_start_request(struct ceph_osd_client *osdc,
1021 struct ceph_osd_request *req,
1022 bool nofail)
1023{
Sage Weilc1ea8822009-10-08 16:55:47 -07001024 int rc = 0;
Sage Weilf24e9982009-10-06 11:31:10 -07001025
1026 req->r_request->pages = req->r_pages;
1027 req->r_request->nr_pages = req->r_num_pages;
1028
1029 register_request(osdc, req);
1030
1031 down_read(&osdc->map_sem);
1032 mutex_lock(&osdc->request_mutex);
Sage Weilc1ea8822009-10-08 16:55:47 -07001033 /*
1034 * a racing kick_requests() may have sent the message for us
1035 * while we dropped request_mutex above, so only send now if
1036 * the request still han't been touched yet.
1037 */
1038 if (req->r_sent == 0) {
1039 rc = __send_request(osdc, req);
1040 if (rc) {
1041 if (nofail) {
1042 dout("osdc_start_request failed send, "
1043 " marking %lld\n", req->r_tid);
1044 req->r_resend = true;
1045 rc = 0;
1046 } else {
1047 __unregister_request(osdc, req);
1048 }
Sage Weilf24e9982009-10-06 11:31:10 -07001049 }
1050 }
1051 mutex_unlock(&osdc->request_mutex);
1052 up_read(&osdc->map_sem);
1053 return rc;
1054}
1055
1056/*
1057 * wait for a request to complete
1058 */
1059int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
1060 struct ceph_osd_request *req)
1061{
1062 int rc;
1063
1064 rc = wait_for_completion_interruptible(&req->r_completion);
1065 if (rc < 0) {
1066 mutex_lock(&osdc->request_mutex);
1067 __cancel_request(req);
1068 mutex_unlock(&osdc->request_mutex);
1069 dout("wait_request tid %llu timed out\n", req->r_tid);
1070 return rc;
1071 }
1072
1073 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
1074 return req->r_result;
1075}
1076
1077/*
1078 * sync - wait for all in-flight requests to flush. avoid starvation.
1079 */
1080void ceph_osdc_sync(struct ceph_osd_client *osdc)
1081{
1082 struct ceph_osd_request *req;
1083 u64 last_tid, next_tid = 0;
1084
1085 mutex_lock(&osdc->request_mutex);
1086 last_tid = osdc->last_tid;
1087 while (1) {
1088 req = __lookup_request_ge(osdc, next_tid);
1089 if (!req)
1090 break;
1091 if (req->r_tid > last_tid)
1092 break;
1093
1094 next_tid = req->r_tid + 1;
1095 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
1096 continue;
1097
1098 ceph_osdc_get_request(req);
1099 mutex_unlock(&osdc->request_mutex);
1100 dout("sync waiting on tid %llu (last is %llu)\n",
1101 req->r_tid, last_tid);
1102 wait_for_completion(&req->r_safe_completion);
1103 mutex_lock(&osdc->request_mutex);
1104 ceph_osdc_put_request(req);
1105 }
1106 mutex_unlock(&osdc->request_mutex);
1107 dout("sync done (thru tid %llu)\n", last_tid);
1108}
1109
1110/*
1111 * init, shutdown
1112 */
1113int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
1114{
1115 int err;
1116
1117 dout("init\n");
1118 osdc->client = client;
1119 osdc->osdmap = NULL;
1120 init_rwsem(&osdc->map_sem);
1121 init_completion(&osdc->map_waiters);
1122 osdc->last_requested_map = 0;
1123 mutex_init(&osdc->request_mutex);
1124 osdc->timeout_tid = 0;
1125 osdc->last_tid = 0;
1126 osdc->osds = RB_ROOT;
1127 osdc->requests = RB_ROOT;
1128 osdc->num_requests = 0;
1129 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
1130
Sage Weil5f44f142009-11-18 14:52:18 -08001131 err = -ENOMEM;
Sage Weilf24e9982009-10-06 11:31:10 -07001132 osdc->req_mempool = mempool_create_kmalloc_pool(10,
1133 sizeof(struct ceph_osd_request));
1134 if (!osdc->req_mempool)
Sage Weil5f44f142009-11-18 14:52:18 -08001135 goto out;
Sage Weilf24e9982009-10-06 11:31:10 -07001136
1137 err = ceph_msgpool_init(&osdc->msgpool_op, 4096, 10, true);
1138 if (err < 0)
Sage Weil5f44f142009-11-18 14:52:18 -08001139 goto out_mempool;
Sage Weilf24e9982009-10-06 11:31:10 -07001140 err = ceph_msgpool_init(&osdc->msgpool_op_reply, 512, 0, false);
1141 if (err < 0)
Sage Weil5f44f142009-11-18 14:52:18 -08001142 goto out_msgpool;
Sage Weilf24e9982009-10-06 11:31:10 -07001143 return 0;
Sage Weil5f44f142009-11-18 14:52:18 -08001144
1145out_msgpool:
1146 ceph_msgpool_destroy(&osdc->msgpool_op);
1147out_mempool:
1148 mempool_destroy(osdc->req_mempool);
1149out:
1150 return err;
Sage Weilf24e9982009-10-06 11:31:10 -07001151}
1152
1153void ceph_osdc_stop(struct ceph_osd_client *osdc)
1154{
1155 cancel_delayed_work_sync(&osdc->timeout_work);
1156 if (osdc->osdmap) {
1157 ceph_osdmap_destroy(osdc->osdmap);
1158 osdc->osdmap = NULL;
1159 }
1160 mempool_destroy(osdc->req_mempool);
1161 ceph_msgpool_destroy(&osdc->msgpool_op);
1162 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
1163}
1164
1165/*
1166 * Read some contiguous pages. If we cross a stripe boundary, shorten
1167 * *plen. Return number of bytes read, or error.
1168 */
1169int ceph_osdc_readpages(struct ceph_osd_client *osdc,
1170 struct ceph_vino vino, struct ceph_file_layout *layout,
1171 u64 off, u64 *plen,
1172 u32 truncate_seq, u64 truncate_size,
1173 struct page **pages, int num_pages)
1174{
1175 struct ceph_osd_request *req;
1176 int rc = 0;
1177
1178 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
1179 vino.snap, off, *plen);
1180 req = ceph_osdc_new_request(osdc, layout, vino, off, plen,
1181 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
1182 NULL, 0, truncate_seq, truncate_size, NULL,
1183 false, 1);
1184 if (IS_ERR(req))
1185 return PTR_ERR(req);
1186
1187 /* it may be a short read due to an object boundary */
1188 req->r_pages = pages;
1189 num_pages = calc_pages_for(off, *plen);
1190 req->r_num_pages = num_pages;
1191
1192 dout("readpages final extent is %llu~%llu (%d pages)\n",
1193 off, *plen, req->r_num_pages);
1194
1195 rc = ceph_osdc_start_request(osdc, req, false);
1196 if (!rc)
1197 rc = ceph_osdc_wait_request(osdc, req);
1198
1199 ceph_osdc_put_request(req);
1200 dout("readpages result %d\n", rc);
1201 return rc;
1202}
1203
1204/*
1205 * do a synchronous write on N pages
1206 */
1207int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
1208 struct ceph_file_layout *layout,
1209 struct ceph_snap_context *snapc,
1210 u64 off, u64 len,
1211 u32 truncate_seq, u64 truncate_size,
1212 struct timespec *mtime,
1213 struct page **pages, int num_pages,
1214 int flags, int do_sync, bool nofail)
1215{
1216 struct ceph_osd_request *req;
1217 int rc = 0;
1218
1219 BUG_ON(vino.snap != CEPH_NOSNAP);
1220 req = ceph_osdc_new_request(osdc, layout, vino, off, &len,
1221 CEPH_OSD_OP_WRITE,
1222 flags | CEPH_OSD_FLAG_ONDISK |
1223 CEPH_OSD_FLAG_WRITE,
1224 snapc, do_sync,
1225 truncate_seq, truncate_size, mtime,
1226 nofail, 1);
1227 if (IS_ERR(req))
1228 return PTR_ERR(req);
1229
1230 /* it may be a short write due to an object boundary */
1231 req->r_pages = pages;
1232 req->r_num_pages = calc_pages_for(off, len);
1233 dout("writepages %llu~%llu (%d pages)\n", off, len,
1234 req->r_num_pages);
1235
1236 rc = ceph_osdc_start_request(osdc, req, nofail);
1237 if (!rc)
1238 rc = ceph_osdc_wait_request(osdc, req);
1239
1240 ceph_osdc_put_request(req);
1241 if (rc == 0)
1242 rc = len;
1243 dout("writepages result %d\n", rc);
1244 return rc;
1245}
1246
1247/*
1248 * handle incoming message
1249 */
1250static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
1251{
1252 struct ceph_osd *osd = con->private;
Julia Lawall32c895e2009-11-21 16:53:16 +01001253 struct ceph_osd_client *osdc;
Sage Weilf24e9982009-10-06 11:31:10 -07001254 int type = le16_to_cpu(msg->hdr.type);
1255
1256 if (!osd)
1257 return;
Julia Lawall32c895e2009-11-21 16:53:16 +01001258 osdc = osd->o_osdc;
Sage Weilf24e9982009-10-06 11:31:10 -07001259
1260 switch (type) {
1261 case CEPH_MSG_OSD_MAP:
1262 ceph_osdc_handle_map(osdc, msg);
1263 break;
1264 case CEPH_MSG_OSD_OPREPLY:
1265 handle_reply(osdc, msg);
1266 break;
1267
1268 default:
1269 pr_err("received unknown message type %d %s\n", type,
1270 ceph_msg_type_name(type));
1271 }
1272 ceph_msg_put(msg);
1273}
1274
1275static struct ceph_msg *alloc_msg(struct ceph_connection *con,
1276 struct ceph_msg_header *hdr)
1277{
1278 struct ceph_osd *osd = con->private;
1279 struct ceph_osd_client *osdc = osd->o_osdc;
1280 int type = le16_to_cpu(hdr->type);
Sage Weil8f3bc052009-10-14 17:36:07 -07001281 int front = le32_to_cpu(hdr->front_len);
Sage Weilf24e9982009-10-06 11:31:10 -07001282
1283 switch (type) {
1284 case CEPH_MSG_OSD_OPREPLY:
Sage Weil8f3bc052009-10-14 17:36:07 -07001285 return ceph_msgpool_get(&osdc->msgpool_op_reply, front);
Sage Weilf24e9982009-10-06 11:31:10 -07001286 }
1287 return ceph_alloc_msg(con, hdr);
1288}
1289
1290/*
1291 * Wrappers to refcount containing ceph_osd struct
1292 */
1293static struct ceph_connection *get_osd_con(struct ceph_connection *con)
1294{
1295 struct ceph_osd *osd = con->private;
1296 if (get_osd(osd))
1297 return con;
1298 return NULL;
1299}
1300
1301static void put_osd_con(struct ceph_connection *con)
1302{
1303 struct ceph_osd *osd = con->private;
1304 put_osd(osd);
1305}
1306
Sage Weil4e7a5dc2009-11-18 16:19:57 -08001307/*
1308 * authentication
1309 */
1310static int get_authorizer(struct ceph_connection *con,
Sage Weil50b885b2009-12-01 14:12:07 -08001311 void **buf, int *len, int *proto,
1312 void **reply_buf, int *reply_len, int force_new)
Sage Weil4e7a5dc2009-11-18 16:19:57 -08001313{
1314 struct ceph_osd *o = con->private;
1315 struct ceph_osd_client *osdc = o->o_osdc;
1316 struct ceph_auth_client *ac = osdc->client->monc.auth;
1317 int ret = 0;
1318
1319 if (force_new && o->o_authorizer) {
1320 ac->ops->destroy_authorizer(ac, o->o_authorizer);
1321 o->o_authorizer = NULL;
1322 }
1323 if (o->o_authorizer == NULL) {
1324 ret = ac->ops->create_authorizer(
1325 ac, CEPH_ENTITY_TYPE_OSD,
1326 &o->o_authorizer,
1327 &o->o_authorizer_buf,
1328 &o->o_authorizer_buf_len,
1329 &o->o_authorizer_reply_buf,
1330 &o->o_authorizer_reply_buf_len);
1331 if (ret)
1332 return ret;
1333 }
1334
1335 *proto = ac->protocol;
1336 *buf = o->o_authorizer_buf;
1337 *len = o->o_authorizer_buf_len;
1338 *reply_buf = o->o_authorizer_reply_buf;
1339 *reply_len = o->o_authorizer_reply_buf_len;
1340 return 0;
1341}
1342
1343
1344static int verify_authorizer_reply(struct ceph_connection *con, int len)
1345{
1346 struct ceph_osd *o = con->private;
1347 struct ceph_osd_client *osdc = o->o_osdc;
1348 struct ceph_auth_client *ac = osdc->client->monc.auth;
1349
1350 return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len);
1351}
1352
1353
Sage Weilf24e9982009-10-06 11:31:10 -07001354const static struct ceph_connection_operations osd_con_ops = {
1355 .get = get_osd_con,
1356 .put = put_osd_con,
1357 .dispatch = dispatch,
Sage Weil4e7a5dc2009-11-18 16:19:57 -08001358 .get_authorizer = get_authorizer,
1359 .verify_authorizer_reply = verify_authorizer_reply,
Sage Weilf24e9982009-10-06 11:31:10 -07001360 .alloc_msg = alloc_msg,
Sage Weil81b024e2009-10-09 10:29:18 -07001361 .fault = osd_reset,
Sage Weilf24e9982009-10-06 11:31:10 -07001362 .alloc_middle = ceph_alloc_middle,
1363 .prepare_pages = prepare_pages,
1364};