blob: 5d30d5959b973c1959aff987b51e2b18ccb38041 [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);
742 goto done;
743 }
744
745 dout("handle_reply tid %llu flags %d\n", tid, flags);
746
747 /* either this is a read, or we got the safe response */
748 if ((flags & CEPH_OSD_FLAG_ONDISK) ||
749 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
750 __unregister_request(osdc, req);
751
752 mutex_unlock(&osdc->request_mutex);
753
754 if (req->r_callback)
755 req->r_callback(req, msg);
756 else
757 complete(&req->r_completion);
758
759 if (flags & CEPH_OSD_FLAG_ONDISK) {
760 if (req->r_safe_callback)
761 req->r_safe_callback(req, msg);
762 complete(&req->r_safe_completion); /* fsync waiter */
763 }
764
765done:
766 ceph_osdc_put_request(req);
767 return;
768
769bad:
770 pr_err("corrupt osd_op_reply got %d %d expected %d\n",
771 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len),
772 (int)sizeof(*rhead));
773}
774
775
776/*
777 * Resubmit osd requests whose osd or osd address has changed. Request
778 * a new osd map if osds are down, or we are otherwise unable to determine
779 * how to direct a request.
780 *
781 * Close connections to down osds.
782 *
783 * If @who is specified, resubmit requests for that specific osd.
784 *
785 * Caller should hold map_sem for read and request_mutex.
786 */
787static void kick_requests(struct ceph_osd_client *osdc,
788 struct ceph_osd *kickosd)
789{
790 struct ceph_osd_request *req;
791 struct rb_node *p, *n;
792 int needmap = 0;
793 int err;
794
795 dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1);
796 mutex_lock(&osdc->request_mutex);
797 if (!kickosd) {
798 for (p = rb_first(&osdc->osds); p; p = n) {
799 struct ceph_osd *osd =
800 rb_entry(p, struct ceph_osd, o_node);
801
802 n = rb_next(p);
803 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
804 !ceph_entity_addr_equal(&osd->o_con.peer_addr,
805 ceph_osd_addr(osdc->osdmap,
806 osd->o_osd)))
807 reset_osd(osdc, osd);
808 }
809 }
810
811 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
812 req = rb_entry(p, struct ceph_osd_request, r_node);
813
814 if (req->r_resend) {
815 dout(" r_resend set on tid %llu\n", req->r_tid);
Sage Weil266673d2009-10-09 10:31:32 -0700816 __cancel_request(req);
Sage Weilf24e9982009-10-06 11:31:10 -0700817 goto kick;
818 }
Sage Weil266673d2009-10-09 10:31:32 -0700819 if (req->r_osd && kickosd == req->r_osd) {
820 __cancel_request(req);
Sage Weilf24e9982009-10-06 11:31:10 -0700821 goto kick;
Sage Weil266673d2009-10-09 10:31:32 -0700822 }
Sage Weilf24e9982009-10-06 11:31:10 -0700823
824 err = __map_osds(osdc, req);
825 if (err == 0)
826 continue; /* no change */
827 if (err < 0) {
828 /*
829 * FIXME: really, we should set the request
830 * error and fail if this isn't a 'nofail'
831 * request, but that's a fair bit more
832 * complicated to do. So retry!
833 */
834 dout(" setting r_resend on %llu\n", req->r_tid);
835 req->r_resend = true;
836 continue;
837 }
838 if (req->r_osd == NULL) {
839 dout("tid %llu maps to no valid osd\n", req->r_tid);
840 needmap++; /* request a newer map */
841 continue;
842 }
843
844kick:
Sage Weilc1ea8822009-10-08 16:55:47 -0700845 dout("kicking %p tid %llu osd%d\n", req, req->r_tid,
846 req->r_osd->o_osd);
Sage Weilf24e9982009-10-06 11:31:10 -0700847 req->r_flags |= CEPH_OSD_FLAG_RETRY;
848 err = __send_request(osdc, req);
849 if (err) {
850 dout(" setting r_resend on %llu\n", req->r_tid);
851 req->r_resend = true;
852 }
853 }
854 mutex_unlock(&osdc->request_mutex);
855
856 if (needmap) {
857 dout("%d requests for down osds, need new map\n", needmap);
858 ceph_monc_request_next_osdmap(&osdc->client->monc);
859 }
860}
861
862/*
863 * Process updated osd map.
864 *
865 * The message contains any number of incremental and full maps, normally
866 * indicating some sort of topology change in the cluster. Kick requests
867 * off to different OSDs as needed.
868 */
869void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
870{
871 void *p, *end, *next;
872 u32 nr_maps, maplen;
873 u32 epoch;
874 struct ceph_osdmap *newmap = NULL, *oldmap;
875 int err;
876 struct ceph_fsid fsid;
877
878 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
879 p = msg->front.iov_base;
880 end = p + msg->front.iov_len;
881
882 /* verify fsid */
883 ceph_decode_need(&p, end, sizeof(fsid), bad);
884 ceph_decode_copy(&p, &fsid, sizeof(fsid));
Sage Weil07433042009-11-18 16:50:41 -0800885 if (ceph_check_fsid(osdc->client, &fsid) < 0)
886 return;
Sage Weilf24e9982009-10-06 11:31:10 -0700887
888 down_write(&osdc->map_sem);
889
890 /* incremental maps */
891 ceph_decode_32_safe(&p, end, nr_maps, bad);
892 dout(" %d inc maps\n", nr_maps);
893 while (nr_maps > 0) {
894 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
Sage Weilc89136e2009-10-14 09:59:09 -0700895 epoch = ceph_decode_32(&p);
896 maplen = ceph_decode_32(&p);
Sage Weilf24e9982009-10-06 11:31:10 -0700897 ceph_decode_need(&p, end, maplen, bad);
898 next = p + maplen;
899 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
900 dout("applying incremental map %u len %d\n",
901 epoch, maplen);
902 newmap = osdmap_apply_incremental(&p, next,
903 osdc->osdmap,
904 osdc->client->msgr);
905 if (IS_ERR(newmap)) {
906 err = PTR_ERR(newmap);
907 goto bad;
908 }
909 if (newmap != osdc->osdmap) {
910 ceph_osdmap_destroy(osdc->osdmap);
911 osdc->osdmap = newmap;
912 }
913 } else {
914 dout("ignoring incremental map %u len %d\n",
915 epoch, maplen);
916 }
917 p = next;
918 nr_maps--;
919 }
920 if (newmap)
921 goto done;
922
923 /* full maps */
924 ceph_decode_32_safe(&p, end, nr_maps, bad);
925 dout(" %d full maps\n", nr_maps);
926 while (nr_maps) {
927 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
Sage Weilc89136e2009-10-14 09:59:09 -0700928 epoch = ceph_decode_32(&p);
929 maplen = ceph_decode_32(&p);
Sage Weilf24e9982009-10-06 11:31:10 -0700930 ceph_decode_need(&p, end, maplen, bad);
931 if (nr_maps > 1) {
932 dout("skipping non-latest full map %u len %d\n",
933 epoch, maplen);
934 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
935 dout("skipping full map %u len %d, "
936 "older than our %u\n", epoch, maplen,
937 osdc->osdmap->epoch);
938 } else {
939 dout("taking full map %u len %d\n", epoch, maplen);
940 newmap = osdmap_decode(&p, p+maplen);
941 if (IS_ERR(newmap)) {
942 err = PTR_ERR(newmap);
943 goto bad;
944 }
945 oldmap = osdc->osdmap;
946 osdc->osdmap = newmap;
947 if (oldmap)
948 ceph_osdmap_destroy(oldmap);
949 }
950 p += maplen;
951 nr_maps--;
952 }
953
954done:
955 downgrade_write(&osdc->map_sem);
956 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
957 if (newmap)
958 kick_requests(osdc, NULL);
959 up_read(&osdc->map_sem);
960 return;
961
962bad:
963 pr_err("osdc handle_map corrupt msg\n");
964 up_write(&osdc->map_sem);
965 return;
966}
967
968
969/*
970 * A read request prepares specific pages that data is to be read into.
971 * When a message is being read off the wire, we call prepare_pages to
972 * find those pages.
973 * 0 = success, -1 failure.
974 */
975static int prepare_pages(struct ceph_connection *con, struct ceph_msg *m,
976 int want)
977{
978 struct ceph_osd *osd = con->private;
979 struct ceph_osd_client *osdc;
980 struct ceph_osd_reply_head *rhead = m->front.iov_base;
981 struct ceph_osd_request *req;
982 u64 tid;
983 int ret = -1;
984 int type = le16_to_cpu(m->hdr.type);
985
986 if (!osd)
987 return -1;
988 osdc = osd->o_osdc;
989
990 dout("prepare_pages on msg %p want %d\n", m, want);
991 if (unlikely(type != CEPH_MSG_OSD_OPREPLY))
992 return -1; /* hmm! */
993
994 tid = le64_to_cpu(rhead->tid);
995 mutex_lock(&osdc->request_mutex);
996 req = __lookup_request(osdc, tid);
997 if (!req) {
998 dout("prepare_pages unknown tid %llu\n", tid);
999 goto out;
1000 }
1001 dout("prepare_pages tid %llu has %d pages, want %d\n",
1002 tid, req->r_num_pages, want);
1003 if (likely(req->r_num_pages >= want && !req->r_prepared_pages)) {
1004 m->pages = req->r_pages;
1005 m->nr_pages = req->r_num_pages;
1006 req->r_reply = m; /* only for duration of read over socket */
1007 ceph_msg_get(m);
1008 req->r_prepared_pages = 1;
1009 ret = 0; /* success */
1010 }
1011out:
1012 mutex_unlock(&osdc->request_mutex);
1013 return ret;
1014}
1015
1016/*
1017 * Register request, send initial attempt.
1018 */
1019int ceph_osdc_start_request(struct ceph_osd_client *osdc,
1020 struct ceph_osd_request *req,
1021 bool nofail)
1022{
Sage Weilc1ea8822009-10-08 16:55:47 -07001023 int rc = 0;
Sage Weilf24e9982009-10-06 11:31:10 -07001024
1025 req->r_request->pages = req->r_pages;
1026 req->r_request->nr_pages = req->r_num_pages;
1027
1028 register_request(osdc, req);
1029
1030 down_read(&osdc->map_sem);
1031 mutex_lock(&osdc->request_mutex);
Sage Weilc1ea8822009-10-08 16:55:47 -07001032 /*
1033 * a racing kick_requests() may have sent the message for us
1034 * while we dropped request_mutex above, so only send now if
1035 * the request still han't been touched yet.
1036 */
1037 if (req->r_sent == 0) {
1038 rc = __send_request(osdc, req);
1039 if (rc) {
1040 if (nofail) {
1041 dout("osdc_start_request failed send, "
1042 " marking %lld\n", req->r_tid);
1043 req->r_resend = true;
1044 rc = 0;
1045 } else {
1046 __unregister_request(osdc, req);
1047 }
Sage Weilf24e9982009-10-06 11:31:10 -07001048 }
1049 }
1050 mutex_unlock(&osdc->request_mutex);
1051 up_read(&osdc->map_sem);
1052 return rc;
1053}
1054
1055/*
1056 * wait for a request to complete
1057 */
1058int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
1059 struct ceph_osd_request *req)
1060{
1061 int rc;
1062
1063 rc = wait_for_completion_interruptible(&req->r_completion);
1064 if (rc < 0) {
1065 mutex_lock(&osdc->request_mutex);
1066 __cancel_request(req);
1067 mutex_unlock(&osdc->request_mutex);
1068 dout("wait_request tid %llu timed out\n", req->r_tid);
1069 return rc;
1070 }
1071
1072 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
1073 return req->r_result;
1074}
1075
1076/*
1077 * sync - wait for all in-flight requests to flush. avoid starvation.
1078 */
1079void ceph_osdc_sync(struct ceph_osd_client *osdc)
1080{
1081 struct ceph_osd_request *req;
1082 u64 last_tid, next_tid = 0;
1083
1084 mutex_lock(&osdc->request_mutex);
1085 last_tid = osdc->last_tid;
1086 while (1) {
1087 req = __lookup_request_ge(osdc, next_tid);
1088 if (!req)
1089 break;
1090 if (req->r_tid > last_tid)
1091 break;
1092
1093 next_tid = req->r_tid + 1;
1094 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
1095 continue;
1096
1097 ceph_osdc_get_request(req);
1098 mutex_unlock(&osdc->request_mutex);
1099 dout("sync waiting on tid %llu (last is %llu)\n",
1100 req->r_tid, last_tid);
1101 wait_for_completion(&req->r_safe_completion);
1102 mutex_lock(&osdc->request_mutex);
1103 ceph_osdc_put_request(req);
1104 }
1105 mutex_unlock(&osdc->request_mutex);
1106 dout("sync done (thru tid %llu)\n", last_tid);
1107}
1108
1109/*
1110 * init, shutdown
1111 */
1112int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
1113{
1114 int err;
1115
1116 dout("init\n");
1117 osdc->client = client;
1118 osdc->osdmap = NULL;
1119 init_rwsem(&osdc->map_sem);
1120 init_completion(&osdc->map_waiters);
1121 osdc->last_requested_map = 0;
1122 mutex_init(&osdc->request_mutex);
1123 osdc->timeout_tid = 0;
1124 osdc->last_tid = 0;
1125 osdc->osds = RB_ROOT;
1126 osdc->requests = RB_ROOT;
1127 osdc->num_requests = 0;
1128 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
1129
Sage Weil5f44f142009-11-18 14:52:18 -08001130 err = -ENOMEM;
Sage Weilf24e9982009-10-06 11:31:10 -07001131 osdc->req_mempool = mempool_create_kmalloc_pool(10,
1132 sizeof(struct ceph_osd_request));
1133 if (!osdc->req_mempool)
Sage Weil5f44f142009-11-18 14:52:18 -08001134 goto out;
Sage Weilf24e9982009-10-06 11:31:10 -07001135
1136 err = ceph_msgpool_init(&osdc->msgpool_op, 4096, 10, true);
1137 if (err < 0)
Sage Weil5f44f142009-11-18 14:52:18 -08001138 goto out_mempool;
Sage Weilf24e9982009-10-06 11:31:10 -07001139 err = ceph_msgpool_init(&osdc->msgpool_op_reply, 512, 0, false);
1140 if (err < 0)
Sage Weil5f44f142009-11-18 14:52:18 -08001141 goto out_msgpool;
Sage Weilf24e9982009-10-06 11:31:10 -07001142 return 0;
Sage Weil5f44f142009-11-18 14:52:18 -08001143
1144out_msgpool:
1145 ceph_msgpool_destroy(&osdc->msgpool_op);
1146out_mempool:
1147 mempool_destroy(osdc->req_mempool);
1148out:
1149 return err;
Sage Weilf24e9982009-10-06 11:31:10 -07001150}
1151
1152void ceph_osdc_stop(struct ceph_osd_client *osdc)
1153{
1154 cancel_delayed_work_sync(&osdc->timeout_work);
1155 if (osdc->osdmap) {
1156 ceph_osdmap_destroy(osdc->osdmap);
1157 osdc->osdmap = NULL;
1158 }
1159 mempool_destroy(osdc->req_mempool);
1160 ceph_msgpool_destroy(&osdc->msgpool_op);
1161 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
1162}
1163
1164/*
1165 * Read some contiguous pages. If we cross a stripe boundary, shorten
1166 * *plen. Return number of bytes read, or error.
1167 */
1168int ceph_osdc_readpages(struct ceph_osd_client *osdc,
1169 struct ceph_vino vino, struct ceph_file_layout *layout,
1170 u64 off, u64 *plen,
1171 u32 truncate_seq, u64 truncate_size,
1172 struct page **pages, int num_pages)
1173{
1174 struct ceph_osd_request *req;
1175 int rc = 0;
1176
1177 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
1178 vino.snap, off, *plen);
1179 req = ceph_osdc_new_request(osdc, layout, vino, off, plen,
1180 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
1181 NULL, 0, truncate_seq, truncate_size, NULL,
1182 false, 1);
1183 if (IS_ERR(req))
1184 return PTR_ERR(req);
1185
1186 /* it may be a short read due to an object boundary */
1187 req->r_pages = pages;
1188 num_pages = calc_pages_for(off, *plen);
1189 req->r_num_pages = num_pages;
1190
1191 dout("readpages final extent is %llu~%llu (%d pages)\n",
1192 off, *plen, req->r_num_pages);
1193
1194 rc = ceph_osdc_start_request(osdc, req, false);
1195 if (!rc)
1196 rc = ceph_osdc_wait_request(osdc, req);
1197
1198 ceph_osdc_put_request(req);
1199 dout("readpages result %d\n", rc);
1200 return rc;
1201}
1202
1203/*
1204 * do a synchronous write on N pages
1205 */
1206int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
1207 struct ceph_file_layout *layout,
1208 struct ceph_snap_context *snapc,
1209 u64 off, u64 len,
1210 u32 truncate_seq, u64 truncate_size,
1211 struct timespec *mtime,
1212 struct page **pages, int num_pages,
1213 int flags, int do_sync, bool nofail)
1214{
1215 struct ceph_osd_request *req;
1216 int rc = 0;
1217
1218 BUG_ON(vino.snap != CEPH_NOSNAP);
1219 req = ceph_osdc_new_request(osdc, layout, vino, off, &len,
1220 CEPH_OSD_OP_WRITE,
1221 flags | CEPH_OSD_FLAG_ONDISK |
1222 CEPH_OSD_FLAG_WRITE,
1223 snapc, do_sync,
1224 truncate_seq, truncate_size, mtime,
1225 nofail, 1);
1226 if (IS_ERR(req))
1227 return PTR_ERR(req);
1228
1229 /* it may be a short write due to an object boundary */
1230 req->r_pages = pages;
1231 req->r_num_pages = calc_pages_for(off, len);
1232 dout("writepages %llu~%llu (%d pages)\n", off, len,
1233 req->r_num_pages);
1234
1235 rc = ceph_osdc_start_request(osdc, req, nofail);
1236 if (!rc)
1237 rc = ceph_osdc_wait_request(osdc, req);
1238
1239 ceph_osdc_put_request(req);
1240 if (rc == 0)
1241 rc = len;
1242 dout("writepages result %d\n", rc);
1243 return rc;
1244}
1245
1246/*
1247 * handle incoming message
1248 */
1249static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
1250{
1251 struct ceph_osd *osd = con->private;
Julia Lawall32c895e2009-11-21 16:53:16 +01001252 struct ceph_osd_client *osdc;
Sage Weilf24e9982009-10-06 11:31:10 -07001253 int type = le16_to_cpu(msg->hdr.type);
1254
1255 if (!osd)
1256 return;
Julia Lawall32c895e2009-11-21 16:53:16 +01001257 osdc = osd->o_osdc;
Sage Weilf24e9982009-10-06 11:31:10 -07001258
1259 switch (type) {
1260 case CEPH_MSG_OSD_MAP:
1261 ceph_osdc_handle_map(osdc, msg);
1262 break;
1263 case CEPH_MSG_OSD_OPREPLY:
1264 handle_reply(osdc, msg);
1265 break;
1266
1267 default:
1268 pr_err("received unknown message type %d %s\n", type,
1269 ceph_msg_type_name(type));
1270 }
1271 ceph_msg_put(msg);
1272}
1273
1274static struct ceph_msg *alloc_msg(struct ceph_connection *con,
1275 struct ceph_msg_header *hdr)
1276{
1277 struct ceph_osd *osd = con->private;
1278 struct ceph_osd_client *osdc = osd->o_osdc;
1279 int type = le16_to_cpu(hdr->type);
Sage Weil8f3bc052009-10-14 17:36:07 -07001280 int front = le32_to_cpu(hdr->front_len);
Sage Weilf24e9982009-10-06 11:31:10 -07001281
1282 switch (type) {
1283 case CEPH_MSG_OSD_OPREPLY:
Sage Weil8f3bc052009-10-14 17:36:07 -07001284 return ceph_msgpool_get(&osdc->msgpool_op_reply, front);
Sage Weilf24e9982009-10-06 11:31:10 -07001285 }
1286 return ceph_alloc_msg(con, hdr);
1287}
1288
1289/*
1290 * Wrappers to refcount containing ceph_osd struct
1291 */
1292static struct ceph_connection *get_osd_con(struct ceph_connection *con)
1293{
1294 struct ceph_osd *osd = con->private;
1295 if (get_osd(osd))
1296 return con;
1297 return NULL;
1298}
1299
1300static void put_osd_con(struct ceph_connection *con)
1301{
1302 struct ceph_osd *osd = con->private;
1303 put_osd(osd);
1304}
1305
Sage Weil4e7a5dc2009-11-18 16:19:57 -08001306/*
1307 * authentication
1308 */
1309static int get_authorizer(struct ceph_connection *con,
1310 void **buf, int *len, int *proto,
1311 void **reply_buf, int *reply_len, int force_new)
1312{
1313 struct ceph_osd *o = con->private;
1314 struct ceph_osd_client *osdc = o->o_osdc;
1315 struct ceph_auth_client *ac = osdc->client->monc.auth;
1316 int ret = 0;
1317
1318 if (force_new && o->o_authorizer) {
1319 ac->ops->destroy_authorizer(ac, o->o_authorizer);
1320 o->o_authorizer = NULL;
1321 }
1322 if (o->o_authorizer == NULL) {
1323 ret = ac->ops->create_authorizer(
1324 ac, CEPH_ENTITY_TYPE_OSD,
1325 &o->o_authorizer,
1326 &o->o_authorizer_buf,
1327 &o->o_authorizer_buf_len,
1328 &o->o_authorizer_reply_buf,
1329 &o->o_authorizer_reply_buf_len);
1330 if (ret)
1331 return ret;
1332 }
1333
1334 *proto = ac->protocol;
1335 *buf = o->o_authorizer_buf;
1336 *len = o->o_authorizer_buf_len;
1337 *reply_buf = o->o_authorizer_reply_buf;
1338 *reply_len = o->o_authorizer_reply_buf_len;
1339 return 0;
1340}
1341
1342
1343static int verify_authorizer_reply(struct ceph_connection *con, int len)
1344{
1345 struct ceph_osd *o = con->private;
1346 struct ceph_osd_client *osdc = o->o_osdc;
1347 struct ceph_auth_client *ac = osdc->client->monc.auth;
1348
1349 return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len);
1350}
1351
1352
Sage Weilf24e9982009-10-06 11:31:10 -07001353const static struct ceph_connection_operations osd_con_ops = {
1354 .get = get_osd_con,
1355 .put = put_osd_con,
1356 .dispatch = dispatch,
Sage Weil4e7a5dc2009-11-18 16:19:57 -08001357 .get_authorizer = get_authorizer,
1358 .verify_authorizer_reply = verify_authorizer_reply,
Sage Weilf24e9982009-10-06 11:31:10 -07001359 .alloc_msg = alloc_msg,
Sage Weil81b024e2009-10-09 10:29:18 -07001360 .fault = osd_reset,
Sage Weilf24e9982009-10-06 11:31:10 -07001361 .alloc_middle = ceph_alloc_middle,
1362 .prepare_pages = prepare_pages,
1363};