USB: io_ti: check firmware version before updating
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / ceph / osd_client.c
blob3514f71ff85f79a866fb57699ade4f831d02d859
1 #include "ceph_debug.h"
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>
10 #include "super.h"
11 #include "osd_client.h"
12 #include "messenger.h"
13 #include "decode.h"
14 #include "auth.h"
16 #define OSD_OP_FRONT_LEN 4096
17 #define OSD_OPREPLY_FRONT_LEN 512
19 const static struct ceph_connection_operations osd_con_ops;
20 static int __kick_requests(struct ceph_osd_client *osdc,
21 struct ceph_osd *kickosd);
23 static void kick_requests(struct ceph_osd_client *osdc, struct ceph_osd *osd);
26 * Implement client access to distributed object storage cluster.
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.
34 * Cluster membership and the mapping of data objects onto storage devices
35 * are described by the osd map.
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.
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.
48 * fill osd op in request message.
50 static void calc_layout(struct ceph_osd_client *osdc,
51 struct ceph_vino vino, struct ceph_file_layout *layout,
52 u64 off, u64 *plen,
53 struct ceph_osd_request *req)
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;
61 reqhead->snapid = cpu_to_le64(vino.snap);
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);
70 sprintf(req->r_oid, "%llx.%08llx", vino.ino, bno);
71 req->r_oid_len = strlen(req->r_oid);
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);
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);
82 * requests
84 void ceph_osdc_release_request(struct kref *kref)
86 struct ceph_osd_request *req = container_of(kref,
87 struct ceph_osd_request,
88 r_kref);
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);
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);
112 * build new request AND message, calculate layout, and adjust file
113 * extent as needed.
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.)
119 * if @do_sync, include a 'startsync' command so that the osd will flush
120 * data quickly.
122 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
123 struct ceph_file_layout *layout,
124 struct ceph_vino vino,
125 u64 off, u64 *plen,
126 int opcode, int flags,
127 struct ceph_snap_context *snapc,
128 int do_sync,
129 u32 truncate_seq,
130 u64 truncate_size,
131 struct timespec *mtime,
132 bool use_mempool, int num_reply)
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;
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);
149 if (req == NULL)
150 return ERR_PTR(-ENOMEM);
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;
160 WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0);
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));
172 req->r_reply = msg;
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));
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);
192 req->r_request = msg;
193 req->r_snapc = ceph_get_snap_context(snapc);
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);
202 /* calculate max write size */
203 calc_layout(osdc, vino, layout, off, plen, req);
204 req->r_file_layout = *layout; /* keep a copy */
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);
211 op->extent.truncate_size = cpu_to_le64(truncate_size);
212 op->extent.truncate_seq = cpu_to_le32(truncate_seq);
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;
219 if (do_sync) {
220 op++;
221 op->op = cpu_to_le16(CEPH_OSD_OP_STARTSYNC);
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);
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;
240 * We keep osd requests in an rbtree, sorted by ->r_tid.
242 static void __insert_request(struct ceph_osd_client *osdc,
243 struct ceph_osd_request *new)
245 struct rb_node **p = &osdc->requests.rb_node;
246 struct rb_node *parent = NULL;
247 struct ceph_osd_request *req = NULL;
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();
260 rb_link_node(&new->r_node, parent, p);
261 rb_insert_color(&new->r_node, &osdc->requests);
264 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
265 u64 tid)
267 struct ceph_osd_request *req;
268 struct rb_node *n = osdc->requests.rb_node;
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;
279 return NULL;
282 static struct ceph_osd_request *
283 __lookup_request_ge(struct ceph_osd_client *osdc,
284 u64 tid)
286 struct ceph_osd_request *req;
287 struct rb_node *n = osdc->requests.rb_node;
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;
301 return NULL;
306 * If the osd connection drops, we need to resubmit all requests.
308 static void osd_reset(struct ceph_connection *con)
310 struct ceph_osd *osd = con->private;
311 struct ceph_osd_client *osdc;
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);
323 * Track open sessions with osds.
325 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc)
327 struct ceph_osd *osd;
329 osd = kzalloc(sizeof(*osd), GFP_NOFS);
330 if (!osd)
331 return NULL;
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;
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;
344 INIT_LIST_HEAD(&osd->o_keepalive_item);
345 return osd;
348 static struct ceph_osd *get_osd(struct ceph_osd *osd)
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;
360 static void put_osd(struct ceph_osd *osd)
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);
369 * remove an osd from our map
371 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
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);
381 static void __move_osd_to_lru(struct ceph_osd_client *osdc,
382 struct ceph_osd *osd)
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;
390 static void __remove_osd_from_lru(struct ceph_osd *osd)
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);
397 static void remove_old_osds(struct ceph_osd_client *osdc, int remove_all)
399 struct ceph_osd *osd, *nosd;
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);
408 mutex_unlock(&osdc->request_mutex);
412 * reset osd connect
414 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
416 struct ceph_osd_request *req;
417 int ret = 0;
419 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
420 if (list_empty(&osd->o_requests)) {
421 __remove_osd(osdc, osd);
422 } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd],
423 &osd->o_con.peer_addr,
424 sizeof(osd->o_con.peer_addr)) == 0 &&
425 !ceph_con_opened(&osd->o_con)) {
426 dout(" osd addr hasn't changed and connection never opened,"
427 " letting msgr retry");
428 /* touch each r_stamp for handle_timeout()'s benfit */
429 list_for_each_entry(req, &osd->o_requests, r_osd_item)
430 req->r_stamp = jiffies;
431 ret = -EAGAIN;
432 } else {
433 ceph_con_close(&osd->o_con);
434 ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]);
435 osd->o_incarnation++;
437 return ret;
440 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
442 struct rb_node **p = &osdc->osds.rb_node;
443 struct rb_node *parent = NULL;
444 struct ceph_osd *osd = NULL;
446 while (*p) {
447 parent = *p;
448 osd = rb_entry(parent, struct ceph_osd, o_node);
449 if (new->o_osd < osd->o_osd)
450 p = &(*p)->rb_left;
451 else if (new->o_osd > osd->o_osd)
452 p = &(*p)->rb_right;
453 else
454 BUG();
457 rb_link_node(&new->o_node, parent, p);
458 rb_insert_color(&new->o_node, &osdc->osds);
461 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
463 struct ceph_osd *osd;
464 struct rb_node *n = osdc->osds.rb_node;
466 while (n) {
467 osd = rb_entry(n, struct ceph_osd, o_node);
468 if (o < osd->o_osd)
469 n = n->rb_left;
470 else if (o > osd->o_osd)
471 n = n->rb_right;
472 else
473 return osd;
475 return NULL;
478 static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
480 schedule_delayed_work(&osdc->timeout_work,
481 osdc->client->mount_args->osd_keepalive_timeout * HZ);
484 static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
486 cancel_delayed_work(&osdc->timeout_work);
490 * Register request, assign tid. If this is the first request, set up
491 * the timeout event.
493 static void register_request(struct ceph_osd_client *osdc,
494 struct ceph_osd_request *req)
496 mutex_lock(&osdc->request_mutex);
497 req->r_tid = ++osdc->last_tid;
498 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
499 INIT_LIST_HEAD(&req->r_req_lru_item);
501 dout("register_request %p tid %lld\n", req, req->r_tid);
502 __insert_request(osdc, req);
503 ceph_osdc_get_request(req);
504 osdc->num_requests++;
506 if (osdc->num_requests == 1) {
507 dout(" first request, scheduling timeout\n");
508 __schedule_osd_timeout(osdc);
510 mutex_unlock(&osdc->request_mutex);
514 * called under osdc->request_mutex
516 static void __unregister_request(struct ceph_osd_client *osdc,
517 struct ceph_osd_request *req)
519 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
520 rb_erase(&req->r_node, &osdc->requests);
521 osdc->num_requests--;
523 if (req->r_osd) {
524 /* make sure the original request isn't in flight. */
525 ceph_con_revoke(&req->r_osd->o_con, req->r_request);
527 list_del_init(&req->r_osd_item);
528 if (list_empty(&req->r_osd->o_requests))
529 __move_osd_to_lru(osdc, req->r_osd);
530 req->r_osd = NULL;
533 ceph_osdc_put_request(req);
535 list_del_init(&req->r_req_lru_item);
536 if (osdc->num_requests == 0) {
537 dout(" no requests, canceling timeout\n");
538 __cancel_osd_timeout(osdc);
543 * Cancel a previously queued request message
545 static void __cancel_request(struct ceph_osd_request *req)
547 if (req->r_sent) {
548 ceph_con_revoke(&req->r_osd->o_con, req->r_request);
549 req->r_sent = 0;
551 list_del_init(&req->r_req_lru_item);
555 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
556 * (as needed), and set the request r_osd appropriately. If there is
557 * no up osd, set r_osd to NULL.
559 * Return 0 if unchanged, 1 if changed, or negative on error.
561 * Caller should hold map_sem for read and request_mutex.
563 static int __map_osds(struct ceph_osd_client *osdc,
564 struct ceph_osd_request *req)
566 struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
567 struct ceph_pg pgid;
568 int acting[CEPH_PG_MAX_SIZE];
569 int o = -1, num = 0;
570 int err;
572 dout("map_osds %p tid %lld\n", req, req->r_tid);
573 err = ceph_calc_object_layout(&reqhead->layout, req->r_oid,
574 &req->r_file_layout, osdc->osdmap);
575 if (err)
576 return err;
577 pgid = reqhead->layout.ol_pgid;
578 req->r_pgid = pgid;
580 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
581 if (err > 0) {
582 o = acting[0];
583 num = err;
586 if ((req->r_osd && req->r_osd->o_osd == o &&
587 req->r_sent >= req->r_osd->o_incarnation &&
588 req->r_num_pg_osds == num &&
589 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
590 (req->r_osd == NULL && o == -1))
591 return 0; /* no change */
593 dout("map_osds tid %llu pgid %d.%x osd%d (was osd%d)\n",
594 req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o,
595 req->r_osd ? req->r_osd->o_osd : -1);
597 /* record full pg acting set */
598 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
599 req->r_num_pg_osds = num;
601 if (req->r_osd) {
602 __cancel_request(req);
603 list_del_init(&req->r_osd_item);
604 req->r_osd = NULL;
607 req->r_osd = __lookup_osd(osdc, o);
608 if (!req->r_osd && o >= 0) {
609 err = -ENOMEM;
610 req->r_osd = create_osd(osdc);
611 if (!req->r_osd)
612 goto out;
614 dout("map_osds osd %p is osd%d\n", req->r_osd, o);
615 req->r_osd->o_osd = o;
616 req->r_osd->o_con.peer_name.num = cpu_to_le64(o);
617 __insert_osd(osdc, req->r_osd);
619 ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]);
622 if (req->r_osd) {
623 __remove_osd_from_lru(req->r_osd);
624 list_add(&req->r_osd_item, &req->r_osd->o_requests);
626 err = 1; /* osd or pg changed */
628 out:
629 return err;
633 * caller should hold map_sem (for read) and request_mutex
635 static int __send_request(struct ceph_osd_client *osdc,
636 struct ceph_osd_request *req)
638 struct ceph_osd_request_head *reqhead;
639 int err;
641 err = __map_osds(osdc, req);
642 if (err < 0)
643 return err;
644 if (req->r_osd == NULL) {
645 dout("send_request %p no up osds in pg\n", req);
646 ceph_monc_request_next_osdmap(&osdc->client->monc);
647 return 0;
650 dout("send_request %p tid %llu to osd%d flags %d\n",
651 req, req->r_tid, req->r_osd->o_osd, req->r_flags);
653 reqhead = req->r_request->front.iov_base;
654 reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch);
655 reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */
656 reqhead->reassert_version = req->r_reassert_version;
658 req->r_stamp = jiffies;
659 list_move_tail(&osdc->req_lru, &req->r_req_lru_item);
661 ceph_msg_get(req->r_request); /* send consumes a ref */
662 ceph_con_send(&req->r_osd->o_con, req->r_request);
663 req->r_sent = req->r_osd->o_incarnation;
664 return 0;
668 * Timeout callback, called every N seconds when 1 or more osd
669 * requests has been active for more than N seconds. When this
670 * happens, we ping all OSDs with requests who have timed out to
671 * ensure any communications channel reset is detected. Reset the
672 * request timeouts another N seconds in the future as we go.
673 * Reschedule the timeout event another N seconds in future (unless
674 * there are no open requests).
676 static void handle_timeout(struct work_struct *work)
678 struct ceph_osd_client *osdc =
679 container_of(work, struct ceph_osd_client, timeout_work.work);
680 struct ceph_osd_request *req, *last_req = NULL;
681 struct ceph_osd *osd;
682 unsigned long timeout = osdc->client->mount_args->osd_timeout * HZ;
683 unsigned long keepalive =
684 osdc->client->mount_args->osd_keepalive_timeout * HZ;
685 unsigned long last_stamp = 0;
686 struct rb_node *p;
687 struct list_head slow_osds;
689 dout("timeout\n");
690 down_read(&osdc->map_sem);
692 ceph_monc_request_next_osdmap(&osdc->client->monc);
694 mutex_lock(&osdc->request_mutex);
695 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
696 req = rb_entry(p, struct ceph_osd_request, r_node);
698 if (req->r_resend) {
699 int err;
701 dout("osdc resending prev failed %lld\n", req->r_tid);
702 err = __send_request(osdc, req);
703 if (err)
704 dout("osdc failed again on %lld\n", req->r_tid);
705 else
706 req->r_resend = false;
707 continue;
712 * reset osds that appear to be _really_ unresponsive. this
713 * is a failsafe measure.. we really shouldn't be getting to
714 * this point if the system is working properly. the monitors
715 * should mark the osd as failed and we should find out about
716 * it from an updated osd map.
718 while (!list_empty(&osdc->req_lru)) {
719 req = list_entry(osdc->req_lru.next, struct ceph_osd_request,
720 r_req_lru_item);
722 if (time_before(jiffies, req->r_stamp + timeout))
723 break;
725 BUG_ON(req == last_req && req->r_stamp == last_stamp);
726 last_req = req;
727 last_stamp = req->r_stamp;
729 osd = req->r_osd;
730 BUG_ON(!osd);
731 pr_warning(" tid %llu timed out on osd%d, will reset osd\n",
732 req->r_tid, osd->o_osd);
733 __kick_requests(osdc, osd);
737 * ping osds that are a bit slow. this ensures that if there
738 * is a break in the TCP connection we will notice, and reopen
739 * a connection with that osd (from the fault callback).
741 INIT_LIST_HEAD(&slow_osds);
742 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
743 if (time_before(jiffies, req->r_stamp + keepalive))
744 break;
746 osd = req->r_osd;
747 BUG_ON(!osd);
748 dout(" tid %llu is slow, will send keepalive on osd%d\n",
749 req->r_tid, osd->o_osd);
750 list_move_tail(&osd->o_keepalive_item, &slow_osds);
752 while (!list_empty(&slow_osds)) {
753 osd = list_entry(slow_osds.next, struct ceph_osd,
754 o_keepalive_item);
755 list_del_init(&osd->o_keepalive_item);
756 ceph_con_keepalive(&osd->o_con);
759 __schedule_osd_timeout(osdc);
760 mutex_unlock(&osdc->request_mutex);
762 up_read(&osdc->map_sem);
765 static void handle_osds_timeout(struct work_struct *work)
767 struct ceph_osd_client *osdc =
768 container_of(work, struct ceph_osd_client,
769 osds_timeout_work.work);
770 unsigned long delay =
771 osdc->client->mount_args->osd_idle_ttl * HZ >> 2;
773 dout("osds timeout\n");
774 down_read(&osdc->map_sem);
775 remove_old_osds(osdc, 0);
776 up_read(&osdc->map_sem);
778 schedule_delayed_work(&osdc->osds_timeout_work,
779 round_jiffies_relative(delay));
783 * handle osd op reply. either call the callback if it is specified,
784 * or do the completion to wake up the waiting thread.
786 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
787 struct ceph_connection *con)
789 struct ceph_osd_reply_head *rhead = msg->front.iov_base;
790 struct ceph_osd_request *req;
791 u64 tid;
792 int numops, object_len, flags;
793 s32 result;
795 tid = le64_to_cpu(msg->hdr.tid);
796 if (msg->front.iov_len < sizeof(*rhead))
797 goto bad;
798 numops = le32_to_cpu(rhead->num_ops);
799 object_len = le32_to_cpu(rhead->object_len);
800 result = le32_to_cpu(rhead->result);
801 if (msg->front.iov_len != sizeof(*rhead) + object_len +
802 numops * sizeof(struct ceph_osd_op))
803 goto bad;
804 dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result);
806 /* lookup */
807 mutex_lock(&osdc->request_mutex);
808 req = __lookup_request(osdc, tid);
809 if (req == NULL) {
810 dout("handle_reply tid %llu dne\n", tid);
811 mutex_unlock(&osdc->request_mutex);
812 return;
814 ceph_osdc_get_request(req);
815 flags = le32_to_cpu(rhead->flags);
818 * if this connection filled our message, drop our reference now, to
819 * avoid a (safe but slower) revoke later.
821 if (req->r_con_filling_msg == con && req->r_reply == msg) {
822 dout(" dropping con_filling_msg ref %p\n", con);
823 req->r_con_filling_msg = NULL;
824 ceph_con_put(con);
827 if (!req->r_got_reply) {
828 unsigned bytes;
830 req->r_result = le32_to_cpu(rhead->result);
831 bytes = le32_to_cpu(msg->hdr.data_len);
832 dout("handle_reply result %d bytes %d\n", req->r_result,
833 bytes);
834 if (req->r_result == 0)
835 req->r_result = bytes;
837 /* in case this is a write and we need to replay, */
838 req->r_reassert_version = rhead->reassert_version;
840 req->r_got_reply = 1;
841 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
842 dout("handle_reply tid %llu dup ack\n", tid);
843 mutex_unlock(&osdc->request_mutex);
844 goto done;
847 dout("handle_reply tid %llu flags %d\n", tid, flags);
849 /* either this is a read, or we got the safe response */
850 if (result < 0 ||
851 (flags & CEPH_OSD_FLAG_ONDISK) ||
852 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
853 __unregister_request(osdc, req);
855 mutex_unlock(&osdc->request_mutex);
857 if (req->r_callback)
858 req->r_callback(req, msg);
859 else
860 complete(&req->r_completion);
862 if (flags & CEPH_OSD_FLAG_ONDISK) {
863 if (req->r_safe_callback)
864 req->r_safe_callback(req, msg);
865 complete(&req->r_safe_completion); /* fsync waiter */
868 done:
869 ceph_osdc_put_request(req);
870 return;
872 bad:
873 pr_err("corrupt osd_op_reply got %d %d expected %d\n",
874 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len),
875 (int)sizeof(*rhead));
876 ceph_msg_dump(msg);
880 static int __kick_requests(struct ceph_osd_client *osdc,
881 struct ceph_osd *kickosd)
883 struct ceph_osd_request *req;
884 struct rb_node *p, *n;
885 int needmap = 0;
886 int err;
888 dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1);
889 if (kickosd) {
890 err = __reset_osd(osdc, kickosd);
891 if (err == -EAGAIN)
892 return 1;
893 } else {
894 for (p = rb_first(&osdc->osds); p; p = n) {
895 struct ceph_osd *osd =
896 rb_entry(p, struct ceph_osd, o_node);
898 n = rb_next(p);
899 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
900 memcmp(&osd->o_con.peer_addr,
901 ceph_osd_addr(osdc->osdmap,
902 osd->o_osd),
903 sizeof(struct ceph_entity_addr)) != 0)
904 __reset_osd(osdc, osd);
908 for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
909 req = rb_entry(p, struct ceph_osd_request, r_node);
911 if (req->r_resend) {
912 dout(" r_resend set on tid %llu\n", req->r_tid);
913 __cancel_request(req);
914 goto kick;
916 if (req->r_osd && kickosd == req->r_osd) {
917 __cancel_request(req);
918 goto kick;
921 err = __map_osds(osdc, req);
922 if (err == 0)
923 continue; /* no change */
924 if (err < 0) {
926 * FIXME: really, we should set the request
927 * error and fail if this isn't a 'nofail'
928 * request, but that's a fair bit more
929 * complicated to do. So retry!
931 dout(" setting r_resend on %llu\n", req->r_tid);
932 req->r_resend = true;
933 continue;
935 if (req->r_osd == NULL) {
936 dout("tid %llu maps to no valid osd\n", req->r_tid);
937 needmap++; /* request a newer map */
938 continue;
941 kick:
942 dout("kicking %p tid %llu osd%d\n", req, req->r_tid,
943 req->r_osd ? req->r_osd->o_osd : -1);
944 req->r_flags |= CEPH_OSD_FLAG_RETRY;
945 err = __send_request(osdc, req);
946 if (err) {
947 dout(" setting r_resend on %llu\n", req->r_tid);
948 req->r_resend = true;
952 return needmap;
956 * Resubmit osd requests whose osd or osd address has changed. Request
957 * a new osd map if osds are down, or we are otherwise unable to determine
958 * how to direct a request.
960 * Close connections to down osds.
962 * If @who is specified, resubmit requests for that specific osd.
964 * Caller should hold map_sem for read and request_mutex.
966 static void kick_requests(struct ceph_osd_client *osdc,
967 struct ceph_osd *kickosd)
969 int needmap;
971 mutex_lock(&osdc->request_mutex);
972 needmap = __kick_requests(osdc, kickosd);
973 mutex_unlock(&osdc->request_mutex);
975 if (needmap) {
976 dout("%d requests for down osds, need new map\n", needmap);
977 ceph_monc_request_next_osdmap(&osdc->client->monc);
982 * Process updated osd map.
984 * The message contains any number of incremental and full maps, normally
985 * indicating some sort of topology change in the cluster. Kick requests
986 * off to different OSDs as needed.
988 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
990 void *p, *end, *next;
991 u32 nr_maps, maplen;
992 u32 epoch;
993 struct ceph_osdmap *newmap = NULL, *oldmap;
994 int err;
995 struct ceph_fsid fsid;
997 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
998 p = msg->front.iov_base;
999 end = p + msg->front.iov_len;
1001 /* verify fsid */
1002 ceph_decode_need(&p, end, sizeof(fsid), bad);
1003 ceph_decode_copy(&p, &fsid, sizeof(fsid));
1004 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1005 return;
1007 down_write(&osdc->map_sem);
1009 /* incremental maps */
1010 ceph_decode_32_safe(&p, end, nr_maps, bad);
1011 dout(" %d inc maps\n", nr_maps);
1012 while (nr_maps > 0) {
1013 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1014 epoch = ceph_decode_32(&p);
1015 maplen = ceph_decode_32(&p);
1016 ceph_decode_need(&p, end, maplen, bad);
1017 next = p + maplen;
1018 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1019 dout("applying incremental map %u len %d\n",
1020 epoch, maplen);
1021 newmap = osdmap_apply_incremental(&p, next,
1022 osdc->osdmap,
1023 osdc->client->msgr);
1024 if (IS_ERR(newmap)) {
1025 err = PTR_ERR(newmap);
1026 goto bad;
1028 BUG_ON(!newmap);
1029 if (newmap != osdc->osdmap) {
1030 ceph_osdmap_destroy(osdc->osdmap);
1031 osdc->osdmap = newmap;
1033 } else {
1034 dout("ignoring incremental map %u len %d\n",
1035 epoch, maplen);
1037 p = next;
1038 nr_maps--;
1040 if (newmap)
1041 goto done;
1043 /* full maps */
1044 ceph_decode_32_safe(&p, end, nr_maps, bad);
1045 dout(" %d full maps\n", nr_maps);
1046 while (nr_maps) {
1047 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1048 epoch = ceph_decode_32(&p);
1049 maplen = ceph_decode_32(&p);
1050 ceph_decode_need(&p, end, maplen, bad);
1051 if (nr_maps > 1) {
1052 dout("skipping non-latest full map %u len %d\n",
1053 epoch, maplen);
1054 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1055 dout("skipping full map %u len %d, "
1056 "older than our %u\n", epoch, maplen,
1057 osdc->osdmap->epoch);
1058 } else {
1059 dout("taking full map %u len %d\n", epoch, maplen);
1060 newmap = osdmap_decode(&p, p+maplen);
1061 if (IS_ERR(newmap)) {
1062 err = PTR_ERR(newmap);
1063 goto bad;
1065 BUG_ON(!newmap);
1066 oldmap = osdc->osdmap;
1067 osdc->osdmap = newmap;
1068 if (oldmap)
1069 ceph_osdmap_destroy(oldmap);
1071 p += maplen;
1072 nr_maps--;
1075 done:
1076 downgrade_write(&osdc->map_sem);
1077 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1078 if (newmap)
1079 kick_requests(osdc, NULL);
1080 up_read(&osdc->map_sem);
1081 return;
1083 bad:
1084 pr_err("osdc handle_map corrupt msg\n");
1085 ceph_msg_dump(msg);
1086 up_write(&osdc->map_sem);
1087 return;
1092 * A read request prepares specific pages that data is to be read into.
1093 * When a message is being read off the wire, we call prepare_pages to
1094 * find those pages.
1095 * 0 = success, -1 failure.
1097 static int __prepare_pages(struct ceph_connection *con,
1098 struct ceph_msg_header *hdr,
1099 struct ceph_osd_request *req,
1100 u64 tid,
1101 struct ceph_msg *m)
1103 struct ceph_osd *osd = con->private;
1104 struct ceph_osd_client *osdc;
1105 int ret = -1;
1106 int data_len = le32_to_cpu(hdr->data_len);
1107 unsigned data_off = le16_to_cpu(hdr->data_off);
1109 int want = calc_pages_for(data_off & ~PAGE_MASK, data_len);
1111 if (!osd)
1112 return -1;
1114 osdc = osd->o_osdc;
1116 dout("__prepare_pages on msg %p tid %llu, has %d pages, want %d\n", m,
1117 tid, req->r_num_pages, want);
1118 if (unlikely(req->r_num_pages < want))
1119 goto out;
1120 m->pages = req->r_pages;
1121 m->nr_pages = req->r_num_pages;
1122 ret = 0; /* success */
1123 out:
1124 BUG_ON(ret < 0 || m->nr_pages < want);
1126 return ret;
1130 * Register request, send initial attempt.
1132 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
1133 struct ceph_osd_request *req,
1134 bool nofail)
1136 int rc = 0;
1138 req->r_request->pages = req->r_pages;
1139 req->r_request->nr_pages = req->r_num_pages;
1141 register_request(osdc, req);
1143 down_read(&osdc->map_sem);
1144 mutex_lock(&osdc->request_mutex);
1146 * a racing kick_requests() may have sent the message for us
1147 * while we dropped request_mutex above, so only send now if
1148 * the request still han't been touched yet.
1150 if (req->r_sent == 0) {
1151 rc = __send_request(osdc, req);
1152 if (rc) {
1153 if (nofail) {
1154 dout("osdc_start_request failed send, "
1155 " marking %lld\n", req->r_tid);
1156 req->r_resend = true;
1157 rc = 0;
1158 } else {
1159 __unregister_request(osdc, req);
1163 mutex_unlock(&osdc->request_mutex);
1164 up_read(&osdc->map_sem);
1165 return rc;
1169 * wait for a request to complete
1171 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
1172 struct ceph_osd_request *req)
1174 int rc;
1176 rc = wait_for_completion_interruptible(&req->r_completion);
1177 if (rc < 0) {
1178 mutex_lock(&osdc->request_mutex);
1179 __cancel_request(req);
1180 __unregister_request(osdc, req);
1181 mutex_unlock(&osdc->request_mutex);
1182 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
1183 return rc;
1186 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
1187 return req->r_result;
1191 * sync - wait for all in-flight requests to flush. avoid starvation.
1193 void ceph_osdc_sync(struct ceph_osd_client *osdc)
1195 struct ceph_osd_request *req;
1196 u64 last_tid, next_tid = 0;
1198 mutex_lock(&osdc->request_mutex);
1199 last_tid = osdc->last_tid;
1200 while (1) {
1201 req = __lookup_request_ge(osdc, next_tid);
1202 if (!req)
1203 break;
1204 if (req->r_tid > last_tid)
1205 break;
1207 next_tid = req->r_tid + 1;
1208 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
1209 continue;
1211 ceph_osdc_get_request(req);
1212 mutex_unlock(&osdc->request_mutex);
1213 dout("sync waiting on tid %llu (last is %llu)\n",
1214 req->r_tid, last_tid);
1215 wait_for_completion(&req->r_safe_completion);
1216 mutex_lock(&osdc->request_mutex);
1217 ceph_osdc_put_request(req);
1219 mutex_unlock(&osdc->request_mutex);
1220 dout("sync done (thru tid %llu)\n", last_tid);
1224 * init, shutdown
1226 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
1228 int err;
1230 dout("init\n");
1231 osdc->client = client;
1232 osdc->osdmap = NULL;
1233 init_rwsem(&osdc->map_sem);
1234 init_completion(&osdc->map_waiters);
1235 osdc->last_requested_map = 0;
1236 mutex_init(&osdc->request_mutex);
1237 osdc->last_tid = 0;
1238 osdc->osds = RB_ROOT;
1239 INIT_LIST_HEAD(&osdc->osd_lru);
1240 osdc->requests = RB_ROOT;
1241 INIT_LIST_HEAD(&osdc->req_lru);
1242 osdc->num_requests = 0;
1243 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
1244 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
1246 schedule_delayed_work(&osdc->osds_timeout_work,
1247 round_jiffies_relative(osdc->client->mount_args->osd_idle_ttl * HZ));
1249 err = -ENOMEM;
1250 osdc->req_mempool = mempool_create_kmalloc_pool(10,
1251 sizeof(struct ceph_osd_request));
1252 if (!osdc->req_mempool)
1253 goto out;
1255 err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true);
1256 if (err < 0)
1257 goto out_mempool;
1258 err = ceph_msgpool_init(&osdc->msgpool_op_reply,
1259 OSD_OPREPLY_FRONT_LEN, 10, true);
1260 if (err < 0)
1261 goto out_msgpool;
1262 return 0;
1264 out_msgpool:
1265 ceph_msgpool_destroy(&osdc->msgpool_op);
1266 out_mempool:
1267 mempool_destroy(osdc->req_mempool);
1268 out:
1269 return err;
1272 void ceph_osdc_stop(struct ceph_osd_client *osdc)
1274 cancel_delayed_work_sync(&osdc->timeout_work);
1275 cancel_delayed_work_sync(&osdc->osds_timeout_work);
1276 if (osdc->osdmap) {
1277 ceph_osdmap_destroy(osdc->osdmap);
1278 osdc->osdmap = NULL;
1280 remove_old_osds(osdc, 1);
1281 mempool_destroy(osdc->req_mempool);
1282 ceph_msgpool_destroy(&osdc->msgpool_op);
1283 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
1287 * Read some contiguous pages. If we cross a stripe boundary, shorten
1288 * *plen. Return number of bytes read, or error.
1290 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
1291 struct ceph_vino vino, struct ceph_file_layout *layout,
1292 u64 off, u64 *plen,
1293 u32 truncate_seq, u64 truncate_size,
1294 struct page **pages, int num_pages)
1296 struct ceph_osd_request *req;
1297 int rc = 0;
1299 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
1300 vino.snap, off, *plen);
1301 req = ceph_osdc_new_request(osdc, layout, vino, off, plen,
1302 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
1303 NULL, 0, truncate_seq, truncate_size, NULL,
1304 false, 1);
1305 if (IS_ERR(req))
1306 return PTR_ERR(req);
1308 /* it may be a short read due to an object boundary */
1309 req->r_pages = pages;
1310 num_pages = calc_pages_for(off, *plen);
1311 req->r_num_pages = num_pages;
1313 dout("readpages final extent is %llu~%llu (%d pages)\n",
1314 off, *plen, req->r_num_pages);
1316 rc = ceph_osdc_start_request(osdc, req, false);
1317 if (!rc)
1318 rc = ceph_osdc_wait_request(osdc, req);
1320 ceph_osdc_put_request(req);
1321 dout("readpages result %d\n", rc);
1322 return rc;
1326 * do a synchronous write on N pages
1328 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
1329 struct ceph_file_layout *layout,
1330 struct ceph_snap_context *snapc,
1331 u64 off, u64 len,
1332 u32 truncate_seq, u64 truncate_size,
1333 struct timespec *mtime,
1334 struct page **pages, int num_pages,
1335 int flags, int do_sync, bool nofail)
1337 struct ceph_osd_request *req;
1338 int rc = 0;
1340 BUG_ON(vino.snap != CEPH_NOSNAP);
1341 req = ceph_osdc_new_request(osdc, layout, vino, off, &len,
1342 CEPH_OSD_OP_WRITE,
1343 flags | CEPH_OSD_FLAG_ONDISK |
1344 CEPH_OSD_FLAG_WRITE,
1345 snapc, do_sync,
1346 truncate_seq, truncate_size, mtime,
1347 nofail, 1);
1348 if (IS_ERR(req))
1349 return PTR_ERR(req);
1351 /* it may be a short write due to an object boundary */
1352 req->r_pages = pages;
1353 req->r_num_pages = calc_pages_for(off, len);
1354 dout("writepages %llu~%llu (%d pages)\n", off, len,
1355 req->r_num_pages);
1357 rc = ceph_osdc_start_request(osdc, req, nofail);
1358 if (!rc)
1359 rc = ceph_osdc_wait_request(osdc, req);
1361 ceph_osdc_put_request(req);
1362 if (rc == 0)
1363 rc = len;
1364 dout("writepages result %d\n", rc);
1365 return rc;
1369 * handle incoming message
1371 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
1373 struct ceph_osd *osd = con->private;
1374 struct ceph_osd_client *osdc;
1375 int type = le16_to_cpu(msg->hdr.type);
1377 if (!osd)
1378 return;
1379 osdc = osd->o_osdc;
1381 switch (type) {
1382 case CEPH_MSG_OSD_MAP:
1383 ceph_osdc_handle_map(osdc, msg);
1384 break;
1385 case CEPH_MSG_OSD_OPREPLY:
1386 handle_reply(osdc, msg, con);
1387 break;
1389 default:
1390 pr_err("received unknown message type %d %s\n", type,
1391 ceph_msg_type_name(type));
1393 ceph_msg_put(msg);
1397 * lookup and return message for incoming reply
1399 static struct ceph_msg *get_reply(struct ceph_connection *con,
1400 struct ceph_msg_header *hdr,
1401 int *skip)
1403 struct ceph_osd *osd = con->private;
1404 struct ceph_osd_client *osdc = osd->o_osdc;
1405 struct ceph_msg *m;
1406 struct ceph_osd_request *req;
1407 int front = le32_to_cpu(hdr->front_len);
1408 int data_len = le32_to_cpu(hdr->data_len);
1409 u64 tid;
1410 int err;
1412 tid = le64_to_cpu(hdr->tid);
1413 mutex_lock(&osdc->request_mutex);
1414 req = __lookup_request(osdc, tid);
1415 if (!req) {
1416 *skip = 1;
1417 m = NULL;
1418 pr_info("get_reply unknown tid %llu from osd%d\n", tid,
1419 osd->o_osd);
1420 goto out;
1423 if (req->r_con_filling_msg) {
1424 dout("get_reply revoking msg %p from old con %p\n",
1425 req->r_reply, req->r_con_filling_msg);
1426 ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply);
1427 ceph_con_put(req->r_con_filling_msg);
1430 if (front > req->r_reply->front.iov_len) {
1431 pr_warning("get_reply front %d > preallocated %d\n",
1432 front, (int)req->r_reply->front.iov_len);
1433 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, 0, 0, NULL);
1434 if (IS_ERR(m))
1435 goto out;
1436 ceph_msg_put(req->r_reply);
1437 req->r_reply = m;
1439 m = ceph_msg_get(req->r_reply);
1441 if (data_len > 0) {
1442 err = __prepare_pages(con, hdr, req, tid, m);
1443 if (err < 0) {
1444 *skip = 1;
1445 ceph_msg_put(m);
1446 m = ERR_PTR(err);
1449 *skip = 0;
1450 req->r_con_filling_msg = ceph_con_get(con);
1451 dout("get_reply tid %lld %p\n", tid, m);
1453 out:
1454 mutex_unlock(&osdc->request_mutex);
1455 return m;
1459 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
1460 struct ceph_msg_header *hdr,
1461 int *skip)
1463 struct ceph_osd *osd = con->private;
1464 int type = le16_to_cpu(hdr->type);
1465 int front = le32_to_cpu(hdr->front_len);
1467 switch (type) {
1468 case CEPH_MSG_OSD_MAP:
1469 return ceph_msg_new(type, front, 0, 0, NULL);
1470 case CEPH_MSG_OSD_OPREPLY:
1471 return get_reply(con, hdr, skip);
1472 default:
1473 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
1474 osd->o_osd);
1475 *skip = 1;
1476 return NULL;
1481 * Wrappers to refcount containing ceph_osd struct
1483 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
1485 struct ceph_osd *osd = con->private;
1486 if (get_osd(osd))
1487 return con;
1488 return NULL;
1491 static void put_osd_con(struct ceph_connection *con)
1493 struct ceph_osd *osd = con->private;
1494 put_osd(osd);
1498 * authentication
1500 static int get_authorizer(struct ceph_connection *con,
1501 void **buf, int *len, int *proto,
1502 void **reply_buf, int *reply_len, int force_new)
1504 struct ceph_osd *o = con->private;
1505 struct ceph_osd_client *osdc = o->o_osdc;
1506 struct ceph_auth_client *ac = osdc->client->monc.auth;
1507 int ret = 0;
1509 if (force_new && o->o_authorizer) {
1510 ac->ops->destroy_authorizer(ac, o->o_authorizer);
1511 o->o_authorizer = NULL;
1513 if (o->o_authorizer == NULL) {
1514 ret = ac->ops->create_authorizer(
1515 ac, CEPH_ENTITY_TYPE_OSD,
1516 &o->o_authorizer,
1517 &o->o_authorizer_buf,
1518 &o->o_authorizer_buf_len,
1519 &o->o_authorizer_reply_buf,
1520 &o->o_authorizer_reply_buf_len);
1521 if (ret)
1522 return ret;
1525 *proto = ac->protocol;
1526 *buf = o->o_authorizer_buf;
1527 *len = o->o_authorizer_buf_len;
1528 *reply_buf = o->o_authorizer_reply_buf;
1529 *reply_len = o->o_authorizer_reply_buf_len;
1530 return 0;
1534 static int verify_authorizer_reply(struct ceph_connection *con, int len)
1536 struct ceph_osd *o = con->private;
1537 struct ceph_osd_client *osdc = o->o_osdc;
1538 struct ceph_auth_client *ac = osdc->client->monc.auth;
1540 return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len);
1543 static int invalidate_authorizer(struct ceph_connection *con)
1545 struct ceph_osd *o = con->private;
1546 struct ceph_osd_client *osdc = o->o_osdc;
1547 struct ceph_auth_client *ac = osdc->client->monc.auth;
1549 if (ac->ops->invalidate_authorizer)
1550 ac->ops->invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
1552 return ceph_monc_validate_auth(&osdc->client->monc);
1555 const static struct ceph_connection_operations osd_con_ops = {
1556 .get = get_osd_con,
1557 .put = put_osd_con,
1558 .dispatch = dispatch,
1559 .get_authorizer = get_authorizer,
1560 .verify_authorizer_reply = verify_authorizer_reply,
1561 .invalidate_authorizer = invalidate_authorizer,
1562 .alloc_msg = alloc_msg,
1563 .fault = osd_reset,