1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/ceph/ceph_debug.h>
5 #include <linux/module.h>
7 #include <linux/highmem.h>
9 #include <linux/pagemap.h>
10 #include <linux/slab.h>
11 #include <linux/uaccess.h>
13 #include <linux/bio.h>
16 #include <linux/ceph/ceph_features.h>
17 #include <linux/ceph/libceph.h>
18 #include <linux/ceph/osd_client.h>
19 #include <linux/ceph/messenger.h>
20 #include <linux/ceph/decode.h>
21 #include <linux/ceph/auth.h>
22 #include <linux/ceph/pagelist.h>
23 #include <linux/ceph/striper.h>
25 #define OSD_OPREPLY_FRONT_LEN 512
27 static struct kmem_cache *ceph_osd_request_cache;
29 static const struct ceph_connection_operations osd_con_ops;
32 * Implement client access to distributed object storage cluster.
34 * All data objects are stored within a cluster/cloud of OSDs, or
35 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
36 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
37 * remote daemons serving up and coordinating consistent and safe
40 * Cluster membership and the mapping of data objects onto storage devices
41 * are described by the osd map.
43 * We keep track of pending OSD requests (read, write), resubmit
44 * requests to different OSDs when the cluster topology/data layout
45 * change, or retry the affected requests when the communications
46 * channel with an OSD is reset.
49 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
50 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
51 static void link_linger(struct ceph_osd *osd,
52 struct ceph_osd_linger_request *lreq);
53 static void unlink_linger(struct ceph_osd *osd,
54 struct ceph_osd_linger_request *lreq);
55 static void clear_backoffs(struct ceph_osd *osd);
58 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
62 if (unlikely(down_read_trylock(sem))) {
69 static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
71 WARN_ON(!rwsem_is_locked(&osdc->lock));
73 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
75 WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
77 static inline void verify_osd_locked(struct ceph_osd *osd)
79 struct ceph_osd_client *osdc = osd->o_osdc;
81 WARN_ON(!(mutex_is_locked(&osd->lock) &&
82 rwsem_is_locked(&osdc->lock)) &&
83 !rwsem_is_wrlocked(&osdc->lock));
85 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
87 WARN_ON(!mutex_is_locked(&lreq->lock));
90 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
91 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
92 static inline void verify_osd_locked(struct ceph_osd *osd) { }
93 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
97 * calculate the mapping of a file extent onto an object, and fill out the
98 * request accordingly. shorten extent as necessary if it crosses an
101 * fill osd op in request message.
103 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
104 u64 *objnum, u64 *objoff, u64 *objlen)
106 u64 orig_len = *plen;
110 ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
113 if (*objlen < orig_len) {
115 dout(" skipping last %llu, final file extent %llu~%llu\n",
116 orig_len - *plen, off, *plen);
119 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
123 static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
125 memset(osd_data, 0, sizeof (*osd_data));
126 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
130 * Consumes @pages if @own_pages is true.
132 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
133 struct page **pages, u64 length, u32 alignment,
134 bool pages_from_pool, bool own_pages)
136 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
137 osd_data->pages = pages;
138 osd_data->length = length;
139 osd_data->alignment = alignment;
140 osd_data->pages_from_pool = pages_from_pool;
141 osd_data->own_pages = own_pages;
145 * Consumes a ref on @pagelist.
147 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
148 struct ceph_pagelist *pagelist)
150 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
151 osd_data->pagelist = pagelist;
155 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
156 struct ceph_bio_iter *bio_pos,
159 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
160 osd_data->bio_pos = *bio_pos;
161 osd_data->bio_length = bio_length;
163 #endif /* CONFIG_BLOCK */
165 static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
166 struct ceph_bvec_iter *bvec_pos,
169 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
170 osd_data->bvec_pos = *bvec_pos;
171 osd_data->num_bvecs = num_bvecs;
174 static struct ceph_osd_data *
175 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
177 BUG_ON(which >= osd_req->r_num_ops);
179 return &osd_req->r_ops[which].raw_data_in;
182 struct ceph_osd_data *
183 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
186 return osd_req_op_data(osd_req, which, extent, osd_data);
188 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
190 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
191 unsigned int which, struct page **pages,
192 u64 length, u32 alignment,
193 bool pages_from_pool, bool own_pages)
195 struct ceph_osd_data *osd_data;
197 osd_data = osd_req_op_raw_data_in(osd_req, which);
198 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
199 pages_from_pool, own_pages);
201 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
203 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
204 unsigned int which, struct page **pages,
205 u64 length, u32 alignment,
206 bool pages_from_pool, bool own_pages)
208 struct ceph_osd_data *osd_data;
210 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
211 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
212 pages_from_pool, own_pages);
214 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
216 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
217 unsigned int which, struct ceph_pagelist *pagelist)
219 struct ceph_osd_data *osd_data;
221 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
222 ceph_osd_data_pagelist_init(osd_data, pagelist);
224 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
227 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
229 struct ceph_bio_iter *bio_pos,
232 struct ceph_osd_data *osd_data;
234 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
235 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
237 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
238 #endif /* CONFIG_BLOCK */
240 void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
242 struct bio_vec *bvecs, u32 num_bvecs,
245 struct ceph_osd_data *osd_data;
246 struct ceph_bvec_iter it = {
248 .iter = { .bi_size = bytes },
251 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
252 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
254 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
256 void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
258 struct ceph_bvec_iter *bvec_pos)
260 struct ceph_osd_data *osd_data;
262 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
263 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
265 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
267 static void osd_req_op_cls_request_info_pagelist(
268 struct ceph_osd_request *osd_req,
269 unsigned int which, struct ceph_pagelist *pagelist)
271 struct ceph_osd_data *osd_data;
273 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
274 ceph_osd_data_pagelist_init(osd_data, pagelist);
277 void osd_req_op_cls_request_data_pagelist(
278 struct ceph_osd_request *osd_req,
279 unsigned int which, struct ceph_pagelist *pagelist)
281 struct ceph_osd_data *osd_data;
283 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
284 ceph_osd_data_pagelist_init(osd_data, pagelist);
285 osd_req->r_ops[which].cls.indata_len += pagelist->length;
286 osd_req->r_ops[which].indata_len += pagelist->length;
288 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
290 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
291 unsigned int which, struct page **pages, u64 length,
292 u32 alignment, bool pages_from_pool, bool own_pages)
294 struct ceph_osd_data *osd_data;
296 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
297 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
298 pages_from_pool, own_pages);
299 osd_req->r_ops[which].cls.indata_len += length;
300 osd_req->r_ops[which].indata_len += length;
302 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
304 void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
306 struct bio_vec *bvecs, u32 num_bvecs,
309 struct ceph_osd_data *osd_data;
310 struct ceph_bvec_iter it = {
312 .iter = { .bi_size = bytes },
315 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
316 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
317 osd_req->r_ops[which].cls.indata_len += bytes;
318 osd_req->r_ops[which].indata_len += bytes;
320 EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
322 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
323 unsigned int which, struct page **pages, u64 length,
324 u32 alignment, bool pages_from_pool, bool own_pages)
326 struct ceph_osd_data *osd_data;
328 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
329 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
330 pages_from_pool, own_pages);
332 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
334 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
336 switch (osd_data->type) {
337 case CEPH_OSD_DATA_TYPE_NONE:
339 case CEPH_OSD_DATA_TYPE_PAGES:
340 return osd_data->length;
341 case CEPH_OSD_DATA_TYPE_PAGELIST:
342 return (u64)osd_data->pagelist->length;
344 case CEPH_OSD_DATA_TYPE_BIO:
345 return (u64)osd_data->bio_length;
346 #endif /* CONFIG_BLOCK */
347 case CEPH_OSD_DATA_TYPE_BVECS:
348 return osd_data->bvec_pos.iter.bi_size;
350 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
355 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
357 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
360 num_pages = calc_pages_for((u64)osd_data->alignment,
361 (u64)osd_data->length);
362 ceph_release_page_vector(osd_data->pages, num_pages);
363 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
364 ceph_pagelist_release(osd_data->pagelist);
366 ceph_osd_data_init(osd_data);
369 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
372 struct ceph_osd_req_op *op;
374 BUG_ON(which >= osd_req->r_num_ops);
375 op = &osd_req->r_ops[which];
378 case CEPH_OSD_OP_READ:
379 case CEPH_OSD_OP_WRITE:
380 case CEPH_OSD_OP_WRITEFULL:
381 ceph_osd_data_release(&op->extent.osd_data);
383 case CEPH_OSD_OP_CALL:
384 ceph_osd_data_release(&op->cls.request_info);
385 ceph_osd_data_release(&op->cls.request_data);
386 ceph_osd_data_release(&op->cls.response_data);
388 case CEPH_OSD_OP_SETXATTR:
389 case CEPH_OSD_OP_CMPXATTR:
390 ceph_osd_data_release(&op->xattr.osd_data);
392 case CEPH_OSD_OP_STAT:
393 ceph_osd_data_release(&op->raw_data_in);
395 case CEPH_OSD_OP_NOTIFY_ACK:
396 ceph_osd_data_release(&op->notify_ack.request_data);
398 case CEPH_OSD_OP_NOTIFY:
399 ceph_osd_data_release(&op->notify.request_data);
400 ceph_osd_data_release(&op->notify.response_data);
402 case CEPH_OSD_OP_LIST_WATCHERS:
403 ceph_osd_data_release(&op->list_watchers.response_data);
405 case CEPH_OSD_OP_COPY_FROM:
406 ceph_osd_data_release(&op->copy_from.osd_data);
414 * Assumes @t is zero-initialized.
416 static void target_init(struct ceph_osd_request_target *t)
418 ceph_oid_init(&t->base_oid);
419 ceph_oloc_init(&t->base_oloc);
420 ceph_oid_init(&t->target_oid);
421 ceph_oloc_init(&t->target_oloc);
423 ceph_osds_init(&t->acting);
424 ceph_osds_init(&t->up);
428 t->osd = CEPH_HOMELESS_OSD;
431 static void target_copy(struct ceph_osd_request_target *dest,
432 const struct ceph_osd_request_target *src)
434 ceph_oid_copy(&dest->base_oid, &src->base_oid);
435 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
436 ceph_oid_copy(&dest->target_oid, &src->target_oid);
437 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
439 dest->pgid = src->pgid; /* struct */
440 dest->spgid = src->spgid; /* struct */
441 dest->pg_num = src->pg_num;
442 dest->pg_num_mask = src->pg_num_mask;
443 ceph_osds_copy(&dest->acting, &src->acting);
444 ceph_osds_copy(&dest->up, &src->up);
445 dest->size = src->size;
446 dest->min_size = src->min_size;
447 dest->sort_bitwise = src->sort_bitwise;
449 dest->flags = src->flags;
450 dest->paused = src->paused;
452 dest->epoch = src->epoch;
453 dest->last_force_resend = src->last_force_resend;
455 dest->osd = src->osd;
458 static void target_destroy(struct ceph_osd_request_target *t)
460 ceph_oid_destroy(&t->base_oid);
461 ceph_oloc_destroy(&t->base_oloc);
462 ceph_oid_destroy(&t->target_oid);
463 ceph_oloc_destroy(&t->target_oloc);
469 static void request_release_checks(struct ceph_osd_request *req)
471 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
472 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
473 WARN_ON(!list_empty(&req->r_private_item));
477 static void ceph_osdc_release_request(struct kref *kref)
479 struct ceph_osd_request *req = container_of(kref,
480 struct ceph_osd_request, r_kref);
483 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
484 req->r_request, req->r_reply);
485 request_release_checks(req);
488 ceph_msg_put(req->r_request);
490 ceph_msg_put(req->r_reply);
492 for (which = 0; which < req->r_num_ops; which++)
493 osd_req_op_data_release(req, which);
495 target_destroy(&req->r_t);
496 ceph_put_snap_context(req->r_snapc);
499 mempool_free(req, req->r_osdc->req_mempool);
500 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
501 kmem_cache_free(ceph_osd_request_cache, req);
506 void ceph_osdc_get_request(struct ceph_osd_request *req)
508 dout("%s %p (was %d)\n", __func__, req,
509 kref_read(&req->r_kref));
510 kref_get(&req->r_kref);
512 EXPORT_SYMBOL(ceph_osdc_get_request);
514 void ceph_osdc_put_request(struct ceph_osd_request *req)
517 dout("%s %p (was %d)\n", __func__, req,
518 kref_read(&req->r_kref));
519 kref_put(&req->r_kref, ceph_osdc_release_request);
522 EXPORT_SYMBOL(ceph_osdc_put_request);
524 static void request_init(struct ceph_osd_request *req)
526 /* req only, each op is zeroed in _osd_req_op_init() */
527 memset(req, 0, sizeof(*req));
529 kref_init(&req->r_kref);
530 init_completion(&req->r_completion);
531 RB_CLEAR_NODE(&req->r_node);
532 RB_CLEAR_NODE(&req->r_mc_node);
533 INIT_LIST_HEAD(&req->r_private_item);
535 target_init(&req->r_t);
539 * This is ugly, but it allows us to reuse linger registration and ping
540 * requests, keeping the structure of the code around send_linger{_ping}()
541 * reasonable. Setting up a min_nr=2 mempool for each linger request
542 * and dealing with copying ops (this blasts req only, watch op remains
543 * intact) isn't any better.
545 static void request_reinit(struct ceph_osd_request *req)
547 struct ceph_osd_client *osdc = req->r_osdc;
548 bool mempool = req->r_mempool;
549 unsigned int num_ops = req->r_num_ops;
550 u64 snapid = req->r_snapid;
551 struct ceph_snap_context *snapc = req->r_snapc;
552 bool linger = req->r_linger;
553 struct ceph_msg *request_msg = req->r_request;
554 struct ceph_msg *reply_msg = req->r_reply;
556 dout("%s req %p\n", __func__, req);
557 WARN_ON(kref_read(&req->r_kref) != 1);
558 request_release_checks(req);
560 WARN_ON(kref_read(&request_msg->kref) != 1);
561 WARN_ON(kref_read(&reply_msg->kref) != 1);
562 target_destroy(&req->r_t);
566 req->r_mempool = mempool;
567 req->r_num_ops = num_ops;
568 req->r_snapid = snapid;
569 req->r_snapc = snapc;
570 req->r_linger = linger;
571 req->r_request = request_msg;
572 req->r_reply = reply_msg;
575 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
576 struct ceph_snap_context *snapc,
577 unsigned int num_ops,
581 struct ceph_osd_request *req;
584 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
585 req = mempool_alloc(osdc->req_mempool, gfp_flags);
586 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
587 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
589 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
590 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
597 req->r_mempool = use_mempool;
598 req->r_num_ops = num_ops;
599 req->r_snapid = CEPH_NOSNAP;
600 req->r_snapc = ceph_get_snap_context(snapc);
602 dout("%s req %p\n", __func__, req);
605 EXPORT_SYMBOL(ceph_osdc_alloc_request);
607 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
609 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
612 static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
613 int num_request_data_items,
614 int num_reply_data_items)
616 struct ceph_osd_client *osdc = req->r_osdc;
617 struct ceph_msg *msg;
620 WARN_ON(req->r_request || req->r_reply);
621 WARN_ON(ceph_oid_empty(&req->r_base_oid));
622 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
624 /* create request message */
625 msg_size = CEPH_ENCODING_START_BLK_LEN +
626 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
627 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
628 msg_size += CEPH_ENCODING_START_BLK_LEN +
629 sizeof(struct ceph_osd_reqid); /* reqid */
630 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
631 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
632 msg_size += CEPH_ENCODING_START_BLK_LEN +
633 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
634 msg_size += 4 + req->r_base_oid.name_len; /* oid */
635 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
636 msg_size += 8; /* snapid */
637 msg_size += 8; /* snap_seq */
638 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
639 msg_size += 4 + 8; /* retry_attempt, features */
642 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
643 num_request_data_items);
645 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
646 num_request_data_items, gfp, true);
650 memset(msg->front.iov_base, 0, msg->front.iov_len);
651 req->r_request = msg;
653 /* create reply message */
654 msg_size = OSD_OPREPLY_FRONT_LEN;
655 msg_size += req->r_base_oid.name_len;
656 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
659 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
660 num_reply_data_items);
662 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
663 num_reply_data_items, gfp, true);
672 static bool osd_req_opcode_valid(u16 opcode)
675 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
676 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
683 static void get_num_data_items(struct ceph_osd_request *req,
684 int *num_request_data_items,
685 int *num_reply_data_items)
687 struct ceph_osd_req_op *op;
689 *num_request_data_items = 0;
690 *num_reply_data_items = 0;
692 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
695 case CEPH_OSD_OP_WRITE:
696 case CEPH_OSD_OP_WRITEFULL:
697 case CEPH_OSD_OP_SETXATTR:
698 case CEPH_OSD_OP_CMPXATTR:
699 case CEPH_OSD_OP_NOTIFY_ACK:
700 case CEPH_OSD_OP_COPY_FROM:
701 *num_request_data_items += 1;
705 case CEPH_OSD_OP_STAT:
706 case CEPH_OSD_OP_READ:
707 case CEPH_OSD_OP_LIST_WATCHERS:
708 *num_reply_data_items += 1;
712 case CEPH_OSD_OP_NOTIFY:
713 *num_request_data_items += 1;
714 *num_reply_data_items += 1;
716 case CEPH_OSD_OP_CALL:
717 *num_request_data_items += 2;
718 *num_reply_data_items += 1;
722 WARN_ON(!osd_req_opcode_valid(op->op));
729 * oid, oloc and OSD op opcode(s) must be filled in before this function
732 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
734 int num_request_data_items, num_reply_data_items;
736 get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
737 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
738 num_reply_data_items);
740 EXPORT_SYMBOL(ceph_osdc_alloc_messages);
743 * This is an osd op init function for opcodes that have no data or
744 * other information associated with them. It also serves as a
745 * common init routine for all the other init functions, below.
747 static struct ceph_osd_req_op *
748 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
749 u16 opcode, u32 flags)
751 struct ceph_osd_req_op *op;
753 BUG_ON(which >= osd_req->r_num_ops);
754 BUG_ON(!osd_req_opcode_valid(opcode));
756 op = &osd_req->r_ops[which];
757 memset(op, 0, sizeof (*op));
764 void osd_req_op_init(struct ceph_osd_request *osd_req,
765 unsigned int which, u16 opcode, u32 flags)
767 (void)_osd_req_op_init(osd_req, which, opcode, flags);
769 EXPORT_SYMBOL(osd_req_op_init);
771 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
772 unsigned int which, u16 opcode,
773 u64 offset, u64 length,
774 u64 truncate_size, u32 truncate_seq)
776 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
778 size_t payload_len = 0;
780 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
781 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
782 opcode != CEPH_OSD_OP_TRUNCATE);
784 op->extent.offset = offset;
785 op->extent.length = length;
786 op->extent.truncate_size = truncate_size;
787 op->extent.truncate_seq = truncate_seq;
788 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
789 payload_len += length;
791 op->indata_len = payload_len;
793 EXPORT_SYMBOL(osd_req_op_extent_init);
795 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
796 unsigned int which, u64 length)
798 struct ceph_osd_req_op *op;
801 BUG_ON(which >= osd_req->r_num_ops);
802 op = &osd_req->r_ops[which];
803 previous = op->extent.length;
805 if (length == previous)
806 return; /* Nothing to do */
807 BUG_ON(length > previous);
809 op->extent.length = length;
810 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
811 op->indata_len -= previous - length;
813 EXPORT_SYMBOL(osd_req_op_extent_update);
815 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
816 unsigned int which, u64 offset_inc)
818 struct ceph_osd_req_op *op, *prev_op;
820 BUG_ON(which + 1 >= osd_req->r_num_ops);
822 prev_op = &osd_req->r_ops[which];
823 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
824 /* dup previous one */
825 op->indata_len = prev_op->indata_len;
826 op->outdata_len = prev_op->outdata_len;
827 op->extent = prev_op->extent;
829 op->extent.offset += offset_inc;
830 op->extent.length -= offset_inc;
832 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
833 op->indata_len -= offset_inc;
835 EXPORT_SYMBOL(osd_req_op_extent_dup_last);
837 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
838 const char *class, const char *method)
840 struct ceph_osd_req_op *op;
841 struct ceph_pagelist *pagelist;
842 size_t payload_len = 0;
845 op = _osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
847 pagelist = ceph_pagelist_alloc(GFP_NOFS);
851 op->cls.class_name = class;
852 size = strlen(class);
853 BUG_ON(size > (size_t) U8_MAX);
854 op->cls.class_len = size;
855 ceph_pagelist_append(pagelist, class, size);
858 op->cls.method_name = method;
859 size = strlen(method);
860 BUG_ON(size > (size_t) U8_MAX);
861 op->cls.method_len = size;
862 ceph_pagelist_append(pagelist, method, size);
865 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
867 op->indata_len = payload_len;
870 EXPORT_SYMBOL(osd_req_op_cls_init);
872 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
873 u16 opcode, const char *name, const void *value,
874 size_t size, u8 cmp_op, u8 cmp_mode)
876 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
878 struct ceph_pagelist *pagelist;
881 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
883 pagelist = ceph_pagelist_alloc(GFP_NOFS);
887 payload_len = strlen(name);
888 op->xattr.name_len = payload_len;
889 ceph_pagelist_append(pagelist, name, payload_len);
891 op->xattr.value_len = size;
892 ceph_pagelist_append(pagelist, value, size);
895 op->xattr.cmp_op = cmp_op;
896 op->xattr.cmp_mode = cmp_mode;
898 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
899 op->indata_len = payload_len;
902 EXPORT_SYMBOL(osd_req_op_xattr_init);
905 * @watch_opcode: CEPH_OSD_WATCH_OP_*
907 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
908 u64 cookie, u8 watch_opcode)
910 struct ceph_osd_req_op *op;
912 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
913 op->watch.cookie = cookie;
914 op->watch.op = watch_opcode;
918 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
920 u64 expected_object_size,
921 u64 expected_write_size)
923 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
924 CEPH_OSD_OP_SETALLOCHINT,
927 op->alloc_hint.expected_object_size = expected_object_size;
928 op->alloc_hint.expected_write_size = expected_write_size;
931 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
932 * not worth a feature bit. Set FAILOK per-op flag to make
933 * sure older osds don't trip over an unsupported opcode.
935 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
937 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
939 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
940 struct ceph_osd_data *osd_data)
942 u64 length = ceph_osd_data_length(osd_data);
944 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
945 BUG_ON(length > (u64) SIZE_MAX);
947 ceph_msg_data_add_pages(msg, osd_data->pages,
948 length, osd_data->alignment);
949 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
951 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
953 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
954 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
956 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
957 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
959 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
963 static u32 osd_req_encode_op(struct ceph_osd_op *dst,
964 const struct ceph_osd_req_op *src)
967 case CEPH_OSD_OP_STAT:
969 case CEPH_OSD_OP_READ:
970 case CEPH_OSD_OP_WRITE:
971 case CEPH_OSD_OP_WRITEFULL:
972 case CEPH_OSD_OP_ZERO:
973 case CEPH_OSD_OP_TRUNCATE:
974 dst->extent.offset = cpu_to_le64(src->extent.offset);
975 dst->extent.length = cpu_to_le64(src->extent.length);
976 dst->extent.truncate_size =
977 cpu_to_le64(src->extent.truncate_size);
978 dst->extent.truncate_seq =
979 cpu_to_le32(src->extent.truncate_seq);
981 case CEPH_OSD_OP_CALL:
982 dst->cls.class_len = src->cls.class_len;
983 dst->cls.method_len = src->cls.method_len;
984 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
986 case CEPH_OSD_OP_WATCH:
987 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
988 dst->watch.ver = cpu_to_le64(0);
989 dst->watch.op = src->watch.op;
990 dst->watch.gen = cpu_to_le32(src->watch.gen);
992 case CEPH_OSD_OP_NOTIFY_ACK:
994 case CEPH_OSD_OP_NOTIFY:
995 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
997 case CEPH_OSD_OP_LIST_WATCHERS:
999 case CEPH_OSD_OP_SETALLOCHINT:
1000 dst->alloc_hint.expected_object_size =
1001 cpu_to_le64(src->alloc_hint.expected_object_size);
1002 dst->alloc_hint.expected_write_size =
1003 cpu_to_le64(src->alloc_hint.expected_write_size);
1005 case CEPH_OSD_OP_SETXATTR:
1006 case CEPH_OSD_OP_CMPXATTR:
1007 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1008 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1009 dst->xattr.cmp_op = src->xattr.cmp_op;
1010 dst->xattr.cmp_mode = src->xattr.cmp_mode;
1012 case CEPH_OSD_OP_CREATE:
1013 case CEPH_OSD_OP_DELETE:
1015 case CEPH_OSD_OP_COPY_FROM:
1016 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1017 dst->copy_from.src_version =
1018 cpu_to_le64(src->copy_from.src_version);
1019 dst->copy_from.flags = src->copy_from.flags;
1020 dst->copy_from.src_fadvise_flags =
1021 cpu_to_le32(src->copy_from.src_fadvise_flags);
1024 pr_err("unsupported osd opcode %s\n",
1025 ceph_osd_op_name(src->op));
1031 dst->op = cpu_to_le16(src->op);
1032 dst->flags = cpu_to_le32(src->flags);
1033 dst->payload_len = cpu_to_le32(src->indata_len);
1035 return src->indata_len;
1039 * build new request AND message, calculate layout, and adjust file
1042 * if the file was recently truncated, we include information about its
1043 * old and new size so that the object can be updated appropriately. (we
1044 * avoid synchronously deleting truncated objects because it's slow.)
1046 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1047 struct ceph_file_layout *layout,
1048 struct ceph_vino vino,
1050 unsigned int which, int num_ops,
1051 int opcode, int flags,
1052 struct ceph_snap_context *snapc,
1057 struct ceph_osd_request *req;
1063 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
1064 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1065 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
1067 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
1074 /* calculate max write size */
1075 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
1079 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
1080 osd_req_op_init(req, which, opcode, 0);
1082 u32 object_size = layout->object_size;
1083 u32 object_base = off - objoff;
1084 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1085 if (truncate_size <= object_base) {
1088 truncate_size -= object_base;
1089 if (truncate_size > object_size)
1090 truncate_size = object_size;
1093 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1094 truncate_size, truncate_seq);
1097 req->r_flags = flags;
1098 req->r_base_oloc.pool = layout->pool_id;
1099 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1100 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1102 req->r_snapid = vino.snap;
1103 if (flags & CEPH_OSD_FLAG_WRITE)
1104 req->r_data_offset = off;
1108 * This is a special case for ceph_writepages_start(), but it
1109 * also covers ceph_uninline_data(). If more multi-op request
1110 * use cases emerge, we will need a separate helper.
1112 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
1114 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
1121 ceph_osdc_put_request(req);
1124 EXPORT_SYMBOL(ceph_osdc_new_request);
1127 * We keep osd requests in an rbtree, sorted by ->r_tid.
1129 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
1130 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
1133 * Call @fn on each OSD request as long as @fn returns 0.
1135 static void for_each_request(struct ceph_osd_client *osdc,
1136 int (*fn)(struct ceph_osd_request *req, void *arg),
1139 struct rb_node *n, *p;
1141 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1142 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1144 for (p = rb_first(&osd->o_requests); p; ) {
1145 struct ceph_osd_request *req =
1146 rb_entry(p, struct ceph_osd_request, r_node);
1154 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1155 struct ceph_osd_request *req =
1156 rb_entry(p, struct ceph_osd_request, r_node);
1164 static bool osd_homeless(struct ceph_osd *osd)
1166 return osd->o_osd == CEPH_HOMELESS_OSD;
1169 static bool osd_registered(struct ceph_osd *osd)
1171 verify_osdc_locked(osd->o_osdc);
1173 return !RB_EMPTY_NODE(&osd->o_node);
1177 * Assumes @osd is zero-initialized.
1179 static void osd_init(struct ceph_osd *osd)
1181 refcount_set(&osd->o_ref, 1);
1182 RB_CLEAR_NODE(&osd->o_node);
1183 osd->o_requests = RB_ROOT;
1184 osd->o_linger_requests = RB_ROOT;
1185 osd->o_backoff_mappings = RB_ROOT;
1186 osd->o_backoffs_by_id = RB_ROOT;
1187 INIT_LIST_HEAD(&osd->o_osd_lru);
1188 INIT_LIST_HEAD(&osd->o_keepalive_item);
1189 osd->o_incarnation = 1;
1190 mutex_init(&osd->lock);
1193 static void osd_cleanup(struct ceph_osd *osd)
1195 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1196 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1197 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1198 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1199 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1200 WARN_ON(!list_empty(&osd->o_osd_lru));
1201 WARN_ON(!list_empty(&osd->o_keepalive_item));
1203 if (osd->o_auth.authorizer) {
1204 WARN_ON(osd_homeless(osd));
1205 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1210 * Track open sessions with osds.
1212 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1214 struct ceph_osd *osd;
1216 WARN_ON(onum == CEPH_HOMELESS_OSD);
1218 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1223 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1228 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1230 if (refcount_inc_not_zero(&osd->o_ref)) {
1231 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1232 refcount_read(&osd->o_ref));
1235 dout("get_osd %p FAIL\n", osd);
1240 static void put_osd(struct ceph_osd *osd)
1242 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1243 refcount_read(&osd->o_ref) - 1);
1244 if (refcount_dec_and_test(&osd->o_ref)) {
1250 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1252 static void __move_osd_to_lru(struct ceph_osd *osd)
1254 struct ceph_osd_client *osdc = osd->o_osdc;
1256 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1257 BUG_ON(!list_empty(&osd->o_osd_lru));
1259 spin_lock(&osdc->osd_lru_lock);
1260 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1261 spin_unlock(&osdc->osd_lru_lock);
1263 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1266 static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1268 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1269 RB_EMPTY_ROOT(&osd->o_linger_requests))
1270 __move_osd_to_lru(osd);
1273 static void __remove_osd_from_lru(struct ceph_osd *osd)
1275 struct ceph_osd_client *osdc = osd->o_osdc;
1277 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1279 spin_lock(&osdc->osd_lru_lock);
1280 if (!list_empty(&osd->o_osd_lru))
1281 list_del_init(&osd->o_osd_lru);
1282 spin_unlock(&osdc->osd_lru_lock);
1286 * Close the connection and assign any leftover requests to the
1289 static void close_osd(struct ceph_osd *osd)
1291 struct ceph_osd_client *osdc = osd->o_osdc;
1294 verify_osdc_wrlocked(osdc);
1295 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1297 ceph_con_close(&osd->o_con);
1299 for (n = rb_first(&osd->o_requests); n; ) {
1300 struct ceph_osd_request *req =
1301 rb_entry(n, struct ceph_osd_request, r_node);
1303 n = rb_next(n); /* unlink_request() */
1305 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1306 unlink_request(osd, req);
1307 link_request(&osdc->homeless_osd, req);
1309 for (n = rb_first(&osd->o_linger_requests); n; ) {
1310 struct ceph_osd_linger_request *lreq =
1311 rb_entry(n, struct ceph_osd_linger_request, node);
1313 n = rb_next(n); /* unlink_linger() */
1315 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1317 unlink_linger(osd, lreq);
1318 link_linger(&osdc->homeless_osd, lreq);
1320 clear_backoffs(osd);
1322 __remove_osd_from_lru(osd);
1323 erase_osd(&osdc->osds, osd);
1330 static int reopen_osd(struct ceph_osd *osd)
1332 struct ceph_entity_addr *peer_addr;
1334 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1336 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1337 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1342 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1343 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1344 !ceph_con_opened(&osd->o_con)) {
1347 dout("osd addr hasn't changed and connection never opened, "
1348 "letting msgr retry\n");
1349 /* touch each r_stamp for handle_timeout()'s benfit */
1350 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1351 struct ceph_osd_request *req =
1352 rb_entry(n, struct ceph_osd_request, r_node);
1353 req->r_stamp = jiffies;
1359 ceph_con_close(&osd->o_con);
1360 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1361 osd->o_incarnation++;
1366 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1369 struct ceph_osd *osd;
1372 verify_osdc_wrlocked(osdc);
1374 verify_osdc_locked(osdc);
1376 if (o != CEPH_HOMELESS_OSD)
1377 osd = lookup_osd(&osdc->osds, o);
1379 osd = &osdc->homeless_osd;
1382 return ERR_PTR(-EAGAIN);
1384 osd = create_osd(osdc, o);
1385 insert_osd(&osdc->osds, osd);
1386 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1387 &osdc->osdmap->osd_addr[osd->o_osd]);
1390 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1395 * Create request <-> OSD session relation.
1397 * @req has to be assigned a tid, @osd may be homeless.
1399 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1401 verify_osd_locked(osd);
1402 WARN_ON(!req->r_tid || req->r_osd);
1403 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1406 if (!osd_homeless(osd))
1407 __remove_osd_from_lru(osd);
1409 atomic_inc(&osd->o_osdc->num_homeless);
1412 insert_request(&osd->o_requests, req);
1416 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1418 verify_osd_locked(osd);
1419 WARN_ON(req->r_osd != osd);
1420 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1424 erase_request(&osd->o_requests, req);
1427 if (!osd_homeless(osd))
1428 maybe_move_osd_to_lru(osd);
1430 atomic_dec(&osd->o_osdc->num_homeless);
1433 static bool __pool_full(struct ceph_pg_pool_info *pi)
1435 return pi->flags & CEPH_POOL_FLAG_FULL;
1438 static bool have_pool_full(struct ceph_osd_client *osdc)
1442 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1443 struct ceph_pg_pool_info *pi =
1444 rb_entry(n, struct ceph_pg_pool_info, node);
1446 if (__pool_full(pi))
1453 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1455 struct ceph_pg_pool_info *pi;
1457 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1461 return __pool_full(pi);
1465 * Returns whether a request should be blocked from being sent
1466 * based on the current osdmap and osd_client settings.
1468 static bool target_should_be_paused(struct ceph_osd_client *osdc,
1469 const struct ceph_osd_request_target *t,
1470 struct ceph_pg_pool_info *pi)
1472 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1473 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1474 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1477 WARN_ON(pi->id != t->target_oloc.pool);
1478 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1479 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1480 (osdc->osdmap->epoch < osdc->epoch_barrier);
1483 enum calc_target_result {
1484 CALC_TARGET_NO_ACTION = 0,
1485 CALC_TARGET_NEED_RESEND,
1486 CALC_TARGET_POOL_DNE,
1489 static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1490 struct ceph_osd_request_target *t,
1491 struct ceph_connection *con,
1494 struct ceph_pg_pool_info *pi;
1495 struct ceph_pg pgid, last_pgid;
1496 struct ceph_osds up, acting;
1497 bool force_resend = false;
1498 bool unpaused = false;
1499 bool legacy_change = false;
1501 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1502 bool recovery_deletes = ceph_osdmap_flag(osdc,
1503 CEPH_OSDMAP_RECOVERY_DELETES);
1504 enum calc_target_result ct_res;
1506 t->epoch = osdc->osdmap->epoch;
1507 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1509 t->osd = CEPH_HOMELESS_OSD;
1510 ct_res = CALC_TARGET_POOL_DNE;
1514 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1515 if (t->last_force_resend < pi->last_force_request_resend) {
1516 t->last_force_resend = pi->last_force_request_resend;
1517 force_resend = true;
1518 } else if (t->last_force_resend == 0) {
1519 force_resend = true;
1524 ceph_oid_copy(&t->target_oid, &t->base_oid);
1525 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1526 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1527 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
1528 t->target_oloc.pool = pi->read_tier;
1529 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
1530 t->target_oloc.pool = pi->write_tier;
1532 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1534 t->osd = CEPH_HOMELESS_OSD;
1535 ct_res = CALC_TARGET_POOL_DNE;
1540 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
1541 last_pgid.pool = pgid.pool;
1542 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1544 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1546 ceph_is_new_interval(&t->acting,
1558 t->recovery_deletes,
1561 force_resend = true;
1563 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1567 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1568 ceph_osds_changed(&t->acting, &acting, any_change);
1570 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1572 if (legacy_change || force_resend || split) {
1573 t->pgid = pgid; /* struct */
1574 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1575 ceph_osds_copy(&t->acting, &acting);
1576 ceph_osds_copy(&t->up, &up);
1578 t->min_size = pi->min_size;
1579 t->pg_num = pi->pg_num;
1580 t->pg_num_mask = pi->pg_num_mask;
1581 t->sort_bitwise = sort_bitwise;
1582 t->recovery_deletes = recovery_deletes;
1584 t->osd = acting.primary;
1587 if (unpaused || legacy_change || force_resend || split)
1588 ct_res = CALC_TARGET_NEED_RESEND;
1590 ct_res = CALC_TARGET_NO_ACTION;
1593 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1594 legacy_change, force_resend, split, ct_res, t->osd);
1598 static struct ceph_spg_mapping *alloc_spg_mapping(void)
1600 struct ceph_spg_mapping *spg;
1602 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1606 RB_CLEAR_NODE(&spg->node);
1607 spg->backoffs = RB_ROOT;
1611 static void free_spg_mapping(struct ceph_spg_mapping *spg)
1613 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1614 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1620 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1621 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1622 * defined only within a specific spgid; it does not pass anything to
1623 * children on split, or to another primary.
1625 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1626 RB_BYPTR, const struct ceph_spg *, node)
1628 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1630 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1633 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1634 void **pkey, size_t *pkey_len)
1636 if (hoid->key_len) {
1638 *pkey_len = hoid->key_len;
1641 *pkey_len = hoid->oid_len;
1645 static int compare_names(const void *name1, size_t name1_len,
1646 const void *name2, size_t name2_len)
1650 ret = memcmp(name1, name2, min(name1_len, name2_len));
1652 if (name1_len < name2_len)
1654 else if (name1_len > name2_len)
1660 static int hoid_compare(const struct ceph_hobject_id *lhs,
1661 const struct ceph_hobject_id *rhs)
1663 void *effective_key1, *effective_key2;
1664 size_t effective_key1_len, effective_key2_len;
1667 if (lhs->is_max < rhs->is_max)
1669 if (lhs->is_max > rhs->is_max)
1672 if (lhs->pool < rhs->pool)
1674 if (lhs->pool > rhs->pool)
1677 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1679 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1682 ret = compare_names(lhs->nspace, lhs->nspace_len,
1683 rhs->nspace, rhs->nspace_len);
1687 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1688 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1689 ret = compare_names(effective_key1, effective_key1_len,
1690 effective_key2, effective_key2_len);
1694 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1698 if (lhs->snapid < rhs->snapid)
1700 if (lhs->snapid > rhs->snapid)
1707 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1708 * compat stuff here.
1710 * Assumes @hoid is zero-initialized.
1712 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1718 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1724 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1728 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1730 if (IS_ERR(hoid->key)) {
1731 ret = PTR_ERR(hoid->key);
1736 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1738 if (IS_ERR(hoid->oid)) {
1739 ret = PTR_ERR(hoid->oid);
1744 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1745 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1746 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1748 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1750 if (IS_ERR(hoid->nspace)) {
1751 ret = PTR_ERR(hoid->nspace);
1752 hoid->nspace = NULL;
1756 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1758 ceph_hoid_build_hash_cache(hoid);
1765 static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1767 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1768 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1771 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1773 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1774 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1775 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1776 ceph_encode_64(p, hoid->snapid);
1777 ceph_encode_32(p, hoid->hash);
1778 ceph_encode_8(p, hoid->is_max);
1779 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1780 ceph_encode_64(p, hoid->pool);
1783 static void free_hoid(struct ceph_hobject_id *hoid)
1788 kfree(hoid->nspace);
1793 static struct ceph_osd_backoff *alloc_backoff(void)
1795 struct ceph_osd_backoff *backoff;
1797 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1801 RB_CLEAR_NODE(&backoff->spg_node);
1802 RB_CLEAR_NODE(&backoff->id_node);
1806 static void free_backoff(struct ceph_osd_backoff *backoff)
1808 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1809 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1811 free_hoid(backoff->begin);
1812 free_hoid(backoff->end);
1817 * Within a specific spgid, backoffs are managed by ->begin hoid.
1819 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1820 RB_BYVAL, spg_node);
1822 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1823 const struct ceph_hobject_id *hoid)
1825 struct rb_node *n = root->rb_node;
1828 struct ceph_osd_backoff *cur =
1829 rb_entry(n, struct ceph_osd_backoff, spg_node);
1832 cmp = hoid_compare(hoid, cur->begin);
1835 } else if (cmp > 0) {
1836 if (hoid_compare(hoid, cur->end) < 0)
1849 * Each backoff has a unique id within its OSD session.
1851 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1853 static void clear_backoffs(struct ceph_osd *osd)
1855 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1856 struct ceph_spg_mapping *spg =
1857 rb_entry(rb_first(&osd->o_backoff_mappings),
1858 struct ceph_spg_mapping, node);
1860 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1861 struct ceph_osd_backoff *backoff =
1862 rb_entry(rb_first(&spg->backoffs),
1863 struct ceph_osd_backoff, spg_node);
1865 erase_backoff(&spg->backoffs, backoff);
1866 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1867 free_backoff(backoff);
1869 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1870 free_spg_mapping(spg);
1875 * Set up a temporary, non-owning view into @t.
1877 static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1878 const struct ceph_osd_request_target *t)
1882 hoid->oid = t->target_oid.name;
1883 hoid->oid_len = t->target_oid.name_len;
1884 hoid->snapid = CEPH_NOSNAP;
1885 hoid->hash = t->pgid.seed;
1886 hoid->is_max = false;
1887 if (t->target_oloc.pool_ns) {
1888 hoid->nspace = t->target_oloc.pool_ns->str;
1889 hoid->nspace_len = t->target_oloc.pool_ns->len;
1891 hoid->nspace = NULL;
1892 hoid->nspace_len = 0;
1894 hoid->pool = t->target_oloc.pool;
1895 ceph_hoid_build_hash_cache(hoid);
1898 static bool should_plug_request(struct ceph_osd_request *req)
1900 struct ceph_osd *osd = req->r_osd;
1901 struct ceph_spg_mapping *spg;
1902 struct ceph_osd_backoff *backoff;
1903 struct ceph_hobject_id hoid;
1905 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1909 hoid_fill_from_target(&hoid, &req->r_t);
1910 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1914 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1915 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1916 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1921 * Keep get_num_data_items() in sync with this function.
1923 static void setup_request_data(struct ceph_osd_request *req)
1925 struct ceph_msg *request_msg = req->r_request;
1926 struct ceph_msg *reply_msg = req->r_reply;
1927 struct ceph_osd_req_op *op;
1929 if (req->r_request->num_data_items || req->r_reply->num_data_items)
1932 WARN_ON(request_msg->data_length || reply_msg->data_length);
1933 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
1936 case CEPH_OSD_OP_WRITE:
1937 case CEPH_OSD_OP_WRITEFULL:
1938 WARN_ON(op->indata_len != op->extent.length);
1939 ceph_osdc_msg_data_add(request_msg,
1940 &op->extent.osd_data);
1942 case CEPH_OSD_OP_SETXATTR:
1943 case CEPH_OSD_OP_CMPXATTR:
1944 WARN_ON(op->indata_len != op->xattr.name_len +
1945 op->xattr.value_len);
1946 ceph_osdc_msg_data_add(request_msg,
1947 &op->xattr.osd_data);
1949 case CEPH_OSD_OP_NOTIFY_ACK:
1950 ceph_osdc_msg_data_add(request_msg,
1951 &op->notify_ack.request_data);
1953 case CEPH_OSD_OP_COPY_FROM:
1954 ceph_osdc_msg_data_add(request_msg,
1955 &op->copy_from.osd_data);
1959 case CEPH_OSD_OP_STAT:
1960 ceph_osdc_msg_data_add(reply_msg,
1963 case CEPH_OSD_OP_READ:
1964 ceph_osdc_msg_data_add(reply_msg,
1965 &op->extent.osd_data);
1967 case CEPH_OSD_OP_LIST_WATCHERS:
1968 ceph_osdc_msg_data_add(reply_msg,
1969 &op->list_watchers.response_data);
1973 case CEPH_OSD_OP_CALL:
1974 WARN_ON(op->indata_len != op->cls.class_len +
1975 op->cls.method_len +
1976 op->cls.indata_len);
1977 ceph_osdc_msg_data_add(request_msg,
1978 &op->cls.request_info);
1979 /* optional, can be NONE */
1980 ceph_osdc_msg_data_add(request_msg,
1981 &op->cls.request_data);
1982 /* optional, can be NONE */
1983 ceph_osdc_msg_data_add(reply_msg,
1984 &op->cls.response_data);
1986 case CEPH_OSD_OP_NOTIFY:
1987 ceph_osdc_msg_data_add(request_msg,
1988 &op->notify.request_data);
1989 ceph_osdc_msg_data_add(reply_msg,
1990 &op->notify.response_data);
1996 static void encode_pgid(void **p, const struct ceph_pg *pgid)
1998 ceph_encode_8(p, 1);
1999 ceph_encode_64(p, pgid->pool);
2000 ceph_encode_32(p, pgid->seed);
2001 ceph_encode_32(p, -1); /* preferred */
2004 static void encode_spgid(void **p, const struct ceph_spg *spgid)
2006 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2007 encode_pgid(p, &spgid->pgid);
2008 ceph_encode_8(p, spgid->shard);
2011 static void encode_oloc(void **p, void *end,
2012 const struct ceph_object_locator *oloc)
2014 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2015 ceph_encode_64(p, oloc->pool);
2016 ceph_encode_32(p, -1); /* preferred */
2017 ceph_encode_32(p, 0); /* key len */
2019 ceph_encode_string(p, end, oloc->pool_ns->str,
2020 oloc->pool_ns->len);
2022 ceph_encode_32(p, 0);
2025 static void encode_request_partial(struct ceph_osd_request *req,
2026 struct ceph_msg *msg)
2028 void *p = msg->front.iov_base;
2029 void *const end = p + msg->front_alloc_len;
2033 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2034 /* snapshots aren't writeable */
2035 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2037 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2038 req->r_data_offset || req->r_snapc);
2041 setup_request_data(req);
2043 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2044 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
2045 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2046 ceph_encode_32(&p, req->r_flags);
2049 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2050 memset(p, 0, sizeof(struct ceph_osd_reqid));
2051 p += sizeof(struct ceph_osd_reqid);
2054 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2055 p += sizeof(struct ceph_blkin_trace_info);
2057 ceph_encode_32(&p, 0); /* client_inc, always 0 */
2058 ceph_encode_timespec64(p, &req->r_mtime);
2059 p += sizeof(struct ceph_timespec);
2061 encode_oloc(&p, end, &req->r_t.target_oloc);
2062 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2063 req->r_t.target_oid.name_len);
2065 /* ops, can imply data */
2066 ceph_encode_16(&p, req->r_num_ops);
2067 for (i = 0; i < req->r_num_ops; i++) {
2068 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2069 p += sizeof(struct ceph_osd_op);
2072 ceph_encode_64(&p, req->r_snapid); /* snapid */
2074 ceph_encode_64(&p, req->r_snapc->seq);
2075 ceph_encode_32(&p, req->r_snapc->num_snaps);
2076 for (i = 0; i < req->r_snapc->num_snaps; i++)
2077 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2079 ceph_encode_64(&p, 0); /* snap_seq */
2080 ceph_encode_32(&p, 0); /* snaps len */
2083 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
2084 BUG_ON(p > end - 8); /* space for features */
2086 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2087 /* front_len is finalized in encode_request_finish() */
2088 msg->front.iov_len = p - msg->front.iov_base;
2089 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2090 msg->hdr.data_len = cpu_to_le32(data_len);
2092 * The header "data_off" is a hint to the receiver allowing it
2093 * to align received data into its buffers such that there's no
2094 * need to re-copy it before writing it to disk (direct I/O).
2096 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
2098 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2099 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2102 static void encode_request_finish(struct ceph_msg *msg)
2104 void *p = msg->front.iov_base;
2105 void *const partial_end = p + msg->front.iov_len;
2106 void *const end = p + msg->front_alloc_len;
2108 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2109 /* luminous OSD -- encode features and be done */
2111 ceph_encode_64(&p, msg->con->peer_features);
2114 char spgid[CEPH_ENCODING_START_BLK_LEN +
2115 CEPH_PGID_ENCODING_LEN + 1];
2119 char reqid[CEPH_ENCODING_START_BLK_LEN +
2120 sizeof(struct ceph_osd_reqid)];
2121 char trace[sizeof(struct ceph_blkin_trace_info)];
2123 struct ceph_timespec mtime;
2125 struct ceph_pg pgid;
2126 void *oloc, *oid, *tail;
2127 int oloc_len, oid_len, tail_len;
2131 * Pre-luminous OSD -- reencode v8 into v4 using @head
2132 * as a temporary buffer. Encode the raw PG; the rest
2133 * is just a matter of moving oloc, oid and tail blobs
2136 memcpy(&head, p, sizeof(head));
2140 p += CEPH_ENCODING_START_BLK_LEN;
2141 pgid.pool = ceph_decode_64(&p);
2142 p += 4 + 4; /* preferred, key len */
2143 len = ceph_decode_32(&p);
2144 p += len; /* nspace */
2145 oloc_len = p - oloc;
2148 len = ceph_decode_32(&p);
2153 tail_len = partial_end - p;
2155 p = msg->front.iov_base;
2156 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2157 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2158 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2159 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2161 /* reassert_version */
2162 memset(p, 0, sizeof(struct ceph_eversion));
2163 p += sizeof(struct ceph_eversion);
2166 memmove(p, oloc, oloc_len);
2169 pgid.seed = le32_to_cpu(head.hash);
2170 encode_pgid(&p, &pgid); /* raw pg */
2173 memmove(p, oid, oid_len);
2176 /* tail -- ops, snapid, snapc, retry_attempt */
2178 memmove(p, tail, tail_len);
2181 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2185 msg->front.iov_len = p - msg->front.iov_base;
2186 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2188 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2189 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2190 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2191 le16_to_cpu(msg->hdr.version));
2195 * @req has to be assigned a tid and registered.
2197 static void send_request(struct ceph_osd_request *req)
2199 struct ceph_osd *osd = req->r_osd;
2201 verify_osd_locked(osd);
2202 WARN_ON(osd->o_osd != req->r_t.osd);
2205 if (should_plug_request(req))
2209 * We may have a previously queued request message hanging
2210 * around. Cancel it to avoid corrupting the msgr.
2213 ceph_msg_revoke(req->r_request);
2215 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2216 if (req->r_attempts)
2217 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2219 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2221 encode_request_partial(req, req->r_request);
2223 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2224 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2225 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2226 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2229 req->r_t.paused = false;
2230 req->r_stamp = jiffies;
2233 req->r_sent = osd->o_incarnation;
2234 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2235 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
2238 static void maybe_request_map(struct ceph_osd_client *osdc)
2240 bool continuous = false;
2242 verify_osdc_locked(osdc);
2243 WARN_ON(!osdc->osdmap->epoch);
2245 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2246 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2247 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2248 dout("%s osdc %p continuous\n", __func__, osdc);
2251 dout("%s osdc %p onetime\n", __func__, osdc);
2254 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2255 osdc->osdmap->epoch + 1, continuous))
2256 ceph_monc_renew_subs(&osdc->client->monc);
2259 static void complete_request(struct ceph_osd_request *req, int err);
2260 static void send_map_check(struct ceph_osd_request *req);
2262 static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2264 struct ceph_osd_client *osdc = req->r_osdc;
2265 struct ceph_osd *osd;
2266 enum calc_target_result ct_res;
2268 bool need_send = false;
2269 bool promoted = false;
2271 WARN_ON(req->r_tid);
2272 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2275 ct_res = calc_target(osdc, &req->r_t, NULL, false);
2276 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2279 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2281 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2285 if (osdc->abort_err) {
2286 dout("req %p abort_err %d\n", req, osdc->abort_err);
2287 err = osdc->abort_err;
2288 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2289 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2290 osdc->epoch_barrier);
2291 req->r_t.paused = true;
2292 maybe_request_map(osdc);
2293 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2294 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2295 dout("req %p pausewr\n", req);
2296 req->r_t.paused = true;
2297 maybe_request_map(osdc);
2298 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2299 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2300 dout("req %p pauserd\n", req);
2301 req->r_t.paused = true;
2302 maybe_request_map(osdc);
2303 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2304 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2305 CEPH_OSD_FLAG_FULL_FORCE)) &&
2306 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2307 pool_full(osdc, req->r_t.base_oloc.pool))) {
2308 dout("req %p full/pool_full\n", req);
2309 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
2312 pr_warn_ratelimited("FULL or reached pool quota\n");
2313 req->r_t.paused = true;
2314 maybe_request_map(osdc);
2316 } else if (!osd_homeless(osd)) {
2319 maybe_request_map(osdc);
2322 mutex_lock(&osd->lock);
2324 * Assign the tid atomically with send_request() to protect
2325 * multiple writes to the same object from racing with each
2326 * other, resulting in out of order ops on the OSDs.
2328 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2329 link_request(osd, req);
2333 complete_request(req, err);
2334 mutex_unlock(&osd->lock);
2336 if (!err && ct_res == CALC_TARGET_POOL_DNE)
2337 send_map_check(req);
2340 downgrade_write(&osdc->lock);
2344 up_read(&osdc->lock);
2345 down_write(&osdc->lock);
2351 static void account_request(struct ceph_osd_request *req)
2353 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
2354 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2356 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2357 atomic_inc(&req->r_osdc->num_requests);
2359 req->r_start_stamp = jiffies;
2362 static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2364 ceph_osdc_get_request(req);
2365 account_request(req);
2366 __submit_request(req, wrlocked);
2369 static void finish_request(struct ceph_osd_request *req)
2371 struct ceph_osd_client *osdc = req->r_osdc;
2373 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2374 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2377 unlink_request(req->r_osd, req);
2378 atomic_dec(&osdc->num_requests);
2381 * If an OSD has failed or returned and a request has been sent
2382 * twice, it's possible to get a reply and end up here while the
2383 * request message is queued for delivery. We will ignore the
2384 * reply, so not a big deal, but better to try and catch it.
2386 ceph_msg_revoke(req->r_request);
2387 ceph_msg_revoke_incoming(req->r_reply);
2390 static void __complete_request(struct ceph_osd_request *req)
2392 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
2393 req->r_tid, req->r_callback, req->r_result);
2395 if (req->r_callback)
2396 req->r_callback(req);
2397 complete_all(&req->r_completion);
2398 ceph_osdc_put_request(req);
2401 static void complete_request_workfn(struct work_struct *work)
2403 struct ceph_osd_request *req =
2404 container_of(work, struct ceph_osd_request, r_complete_work);
2406 __complete_request(req);
2410 * This is open-coded in handle_reply().
2412 static void complete_request(struct ceph_osd_request *req, int err)
2414 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2416 req->r_result = err;
2417 finish_request(req);
2419 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2420 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
2423 static void cancel_map_check(struct ceph_osd_request *req)
2425 struct ceph_osd_client *osdc = req->r_osdc;
2426 struct ceph_osd_request *lookup_req;
2428 verify_osdc_wrlocked(osdc);
2430 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2434 WARN_ON(lookup_req != req);
2435 erase_request_mc(&osdc->map_checks, req);
2436 ceph_osdc_put_request(req);
2439 static void cancel_request(struct ceph_osd_request *req)
2441 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2443 cancel_map_check(req);
2444 finish_request(req);
2445 complete_all(&req->r_completion);
2446 ceph_osdc_put_request(req);
2449 static void abort_request(struct ceph_osd_request *req, int err)
2451 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2453 cancel_map_check(req);
2454 complete_request(req, err);
2457 static int abort_fn(struct ceph_osd_request *req, void *arg)
2459 int err = *(int *)arg;
2461 abort_request(req, err);
2462 return 0; /* continue iteration */
2466 * Abort all in-flight requests with @err and arrange for all future
2467 * requests to be failed immediately.
2469 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2471 dout("%s osdc %p err %d\n", __func__, osdc, err);
2472 down_write(&osdc->lock);
2473 for_each_request(osdc, abort_fn, &err);
2474 osdc->abort_err = err;
2475 up_write(&osdc->lock);
2477 EXPORT_SYMBOL(ceph_osdc_abort_requests);
2479 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2481 if (likely(eb > osdc->epoch_barrier)) {
2482 dout("updating epoch_barrier from %u to %u\n",
2483 osdc->epoch_barrier, eb);
2484 osdc->epoch_barrier = eb;
2485 /* Request map if we're not to the barrier yet */
2486 if (eb > osdc->osdmap->epoch)
2487 maybe_request_map(osdc);
2491 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2493 down_read(&osdc->lock);
2494 if (unlikely(eb > osdc->epoch_barrier)) {
2495 up_read(&osdc->lock);
2496 down_write(&osdc->lock);
2497 update_epoch_barrier(osdc, eb);
2498 up_write(&osdc->lock);
2500 up_read(&osdc->lock);
2503 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2506 * We can end up releasing caps as a result of abort_request().
2507 * In that case, we probably want to ensure that the cap release message
2508 * has an updated epoch barrier in it, so set the epoch barrier prior to
2509 * aborting the first request.
2511 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2513 struct ceph_osd_client *osdc = req->r_osdc;
2514 bool *victims = arg;
2516 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2517 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2518 pool_full(osdc, req->r_t.base_oloc.pool))) {
2520 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2523 abort_request(req, -ENOSPC);
2526 return 0; /* continue iteration */
2530 * Drop all pending requests that are stalled waiting on a full condition to
2531 * clear, and complete them with ENOSPC as the return code. Set the
2532 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2535 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2537 bool victims = false;
2539 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
2540 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
2541 for_each_request(osdc, abort_on_full_fn, &victims);
2544 static void check_pool_dne(struct ceph_osd_request *req)
2546 struct ceph_osd_client *osdc = req->r_osdc;
2547 struct ceph_osdmap *map = osdc->osdmap;
2549 verify_osdc_wrlocked(osdc);
2550 WARN_ON(!map->epoch);
2552 if (req->r_attempts) {
2554 * We sent a request earlier, which means that
2555 * previously the pool existed, and now it does not
2556 * (i.e., it was deleted).
2558 req->r_map_dne_bound = map->epoch;
2559 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2562 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2563 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2566 if (req->r_map_dne_bound) {
2567 if (map->epoch >= req->r_map_dne_bound) {
2568 /* we had a new enough map */
2569 pr_info_ratelimited("tid %llu pool does not exist\n",
2571 complete_request(req, -ENOENT);
2574 send_map_check(req);
2578 static void map_check_cb(struct ceph_mon_generic_request *greq)
2580 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2581 struct ceph_osd_request *req;
2582 u64 tid = greq->private_data;
2584 WARN_ON(greq->result || !greq->u.newest);
2586 down_write(&osdc->lock);
2587 req = lookup_request_mc(&osdc->map_checks, tid);
2589 dout("%s tid %llu dne\n", __func__, tid);
2593 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2594 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2595 if (!req->r_map_dne_bound)
2596 req->r_map_dne_bound = greq->u.newest;
2597 erase_request_mc(&osdc->map_checks, req);
2598 check_pool_dne(req);
2600 ceph_osdc_put_request(req);
2602 up_write(&osdc->lock);
2605 static void send_map_check(struct ceph_osd_request *req)
2607 struct ceph_osd_client *osdc = req->r_osdc;
2608 struct ceph_osd_request *lookup_req;
2611 verify_osdc_wrlocked(osdc);
2613 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2615 WARN_ON(lookup_req != req);
2619 ceph_osdc_get_request(req);
2620 insert_request_mc(&osdc->map_checks, req);
2621 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2622 map_check_cb, req->r_tid);
2627 * lingering requests, watch/notify v2 infrastructure
2629 static void linger_release(struct kref *kref)
2631 struct ceph_osd_linger_request *lreq =
2632 container_of(kref, struct ceph_osd_linger_request, kref);
2634 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2635 lreq->reg_req, lreq->ping_req);
2636 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2637 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
2638 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2639 WARN_ON(!list_empty(&lreq->scan_item));
2640 WARN_ON(!list_empty(&lreq->pending_lworks));
2644 ceph_osdc_put_request(lreq->reg_req);
2646 ceph_osdc_put_request(lreq->ping_req);
2647 target_destroy(&lreq->t);
2651 static void linger_put(struct ceph_osd_linger_request *lreq)
2654 kref_put(&lreq->kref, linger_release);
2657 static struct ceph_osd_linger_request *
2658 linger_get(struct ceph_osd_linger_request *lreq)
2660 kref_get(&lreq->kref);
2664 static struct ceph_osd_linger_request *
2665 linger_alloc(struct ceph_osd_client *osdc)
2667 struct ceph_osd_linger_request *lreq;
2669 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2673 kref_init(&lreq->kref);
2674 mutex_init(&lreq->lock);
2675 RB_CLEAR_NODE(&lreq->node);
2676 RB_CLEAR_NODE(&lreq->osdc_node);
2677 RB_CLEAR_NODE(&lreq->mc_node);
2678 INIT_LIST_HEAD(&lreq->scan_item);
2679 INIT_LIST_HEAD(&lreq->pending_lworks);
2680 init_completion(&lreq->reg_commit_wait);
2681 init_completion(&lreq->notify_finish_wait);
2684 target_init(&lreq->t);
2686 dout("%s lreq %p\n", __func__, lreq);
2690 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2691 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
2692 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2695 * Create linger request <-> OSD session relation.
2697 * @lreq has to be registered, @osd may be homeless.
2699 static void link_linger(struct ceph_osd *osd,
2700 struct ceph_osd_linger_request *lreq)
2702 verify_osd_locked(osd);
2703 WARN_ON(!lreq->linger_id || lreq->osd);
2704 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2705 osd->o_osd, lreq, lreq->linger_id);
2707 if (!osd_homeless(osd))
2708 __remove_osd_from_lru(osd);
2710 atomic_inc(&osd->o_osdc->num_homeless);
2713 insert_linger(&osd->o_linger_requests, lreq);
2717 static void unlink_linger(struct ceph_osd *osd,
2718 struct ceph_osd_linger_request *lreq)
2720 verify_osd_locked(osd);
2721 WARN_ON(lreq->osd != osd);
2722 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2723 osd->o_osd, lreq, lreq->linger_id);
2726 erase_linger(&osd->o_linger_requests, lreq);
2729 if (!osd_homeless(osd))
2730 maybe_move_osd_to_lru(osd);
2732 atomic_dec(&osd->o_osdc->num_homeless);
2735 static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2737 verify_osdc_locked(lreq->osdc);
2739 return !RB_EMPTY_NODE(&lreq->osdc_node);
2742 static bool linger_registered(struct ceph_osd_linger_request *lreq)
2744 struct ceph_osd_client *osdc = lreq->osdc;
2747 down_read(&osdc->lock);
2748 registered = __linger_registered(lreq);
2749 up_read(&osdc->lock);
2754 static void linger_register(struct ceph_osd_linger_request *lreq)
2756 struct ceph_osd_client *osdc = lreq->osdc;
2758 verify_osdc_wrlocked(osdc);
2759 WARN_ON(lreq->linger_id);
2762 lreq->linger_id = ++osdc->last_linger_id;
2763 insert_linger_osdc(&osdc->linger_requests, lreq);
2766 static void linger_unregister(struct ceph_osd_linger_request *lreq)
2768 struct ceph_osd_client *osdc = lreq->osdc;
2770 verify_osdc_wrlocked(osdc);
2772 erase_linger_osdc(&osdc->linger_requests, lreq);
2776 static void cancel_linger_request(struct ceph_osd_request *req)
2778 struct ceph_osd_linger_request *lreq = req->r_priv;
2780 WARN_ON(!req->r_linger);
2781 cancel_request(req);
2785 struct linger_work {
2786 struct work_struct work;
2787 struct ceph_osd_linger_request *lreq;
2788 struct list_head pending_item;
2789 unsigned long queued_stamp;
2795 void *payload; /* points into @msg front */
2798 struct ceph_msg *msg; /* for ceph_msg_put() */
2806 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2809 struct linger_work *lwork;
2811 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2815 INIT_WORK(&lwork->work, workfn);
2816 INIT_LIST_HEAD(&lwork->pending_item);
2817 lwork->lreq = linger_get(lreq);
2822 static void lwork_free(struct linger_work *lwork)
2824 struct ceph_osd_linger_request *lreq = lwork->lreq;
2826 mutex_lock(&lreq->lock);
2827 list_del(&lwork->pending_item);
2828 mutex_unlock(&lreq->lock);
2834 static void lwork_queue(struct linger_work *lwork)
2836 struct ceph_osd_linger_request *lreq = lwork->lreq;
2837 struct ceph_osd_client *osdc = lreq->osdc;
2839 verify_lreq_locked(lreq);
2840 WARN_ON(!list_empty(&lwork->pending_item));
2842 lwork->queued_stamp = jiffies;
2843 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2844 queue_work(osdc->notify_wq, &lwork->work);
2847 static void do_watch_notify(struct work_struct *w)
2849 struct linger_work *lwork = container_of(w, struct linger_work, work);
2850 struct ceph_osd_linger_request *lreq = lwork->lreq;
2852 if (!linger_registered(lreq)) {
2853 dout("%s lreq %p not registered\n", __func__, lreq);
2857 WARN_ON(!lreq->is_watch);
2858 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2859 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2860 lwork->notify.payload_len);
2861 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2862 lwork->notify.notifier_id, lwork->notify.payload,
2863 lwork->notify.payload_len);
2866 ceph_msg_put(lwork->notify.msg);
2870 static void do_watch_error(struct work_struct *w)
2872 struct linger_work *lwork = container_of(w, struct linger_work, work);
2873 struct ceph_osd_linger_request *lreq = lwork->lreq;
2875 if (!linger_registered(lreq)) {
2876 dout("%s lreq %p not registered\n", __func__, lreq);
2880 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2881 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2887 static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2889 struct linger_work *lwork;
2891 lwork = lwork_alloc(lreq, do_watch_error);
2893 pr_err("failed to allocate error-lwork\n");
2897 lwork->error.err = lreq->last_error;
2901 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2904 if (!completion_done(&lreq->reg_commit_wait)) {
2905 lreq->reg_commit_error = (result <= 0 ? result : 0);
2906 complete_all(&lreq->reg_commit_wait);
2910 static void linger_commit_cb(struct ceph_osd_request *req)
2912 struct ceph_osd_linger_request *lreq = req->r_priv;
2914 mutex_lock(&lreq->lock);
2915 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2916 lreq->linger_id, req->r_result);
2917 linger_reg_commit_complete(lreq, req->r_result);
2918 lreq->committed = true;
2920 if (!lreq->is_watch) {
2921 struct ceph_osd_data *osd_data =
2922 osd_req_op_data(req, 0, notify, response_data);
2923 void *p = page_address(osd_data->pages[0]);
2925 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
2926 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
2928 /* make note of the notify_id */
2929 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
2930 lreq->notify_id = ceph_decode_64(&p);
2931 dout("lreq %p notify_id %llu\n", lreq,
2934 dout("lreq %p no notify_id\n", lreq);
2938 mutex_unlock(&lreq->lock);
2942 static int normalize_watch_error(int err)
2945 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
2946 * notification and a failure to reconnect because we raced with
2947 * the delete appear the same to the user.
2955 static void linger_reconnect_cb(struct ceph_osd_request *req)
2957 struct ceph_osd_linger_request *lreq = req->r_priv;
2959 mutex_lock(&lreq->lock);
2960 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
2961 lreq, lreq->linger_id, req->r_result, lreq->last_error);
2962 if (req->r_result < 0) {
2963 if (!lreq->last_error) {
2964 lreq->last_error = normalize_watch_error(req->r_result);
2965 queue_watch_error(lreq);
2969 mutex_unlock(&lreq->lock);
2973 static void send_linger(struct ceph_osd_linger_request *lreq)
2975 struct ceph_osd_request *req = lreq->reg_req;
2976 struct ceph_osd_req_op *op = &req->r_ops[0];
2978 verify_osdc_wrlocked(req->r_osdc);
2979 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
2982 cancel_linger_request(req);
2984 request_reinit(req);
2985 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
2986 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
2987 req->r_flags = lreq->t.flags;
2988 req->r_mtime = lreq->mtime;
2990 mutex_lock(&lreq->lock);
2991 if (lreq->is_watch && lreq->committed) {
2992 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
2993 op->watch.cookie != lreq->linger_id);
2994 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
2995 op->watch.gen = ++lreq->register_gen;
2996 dout("lreq %p reconnect register_gen %u\n", lreq,
2998 req->r_callback = linger_reconnect_cb;
3000 if (!lreq->is_watch)
3001 lreq->notify_id = 0;
3003 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
3004 dout("lreq %p register\n", lreq);
3005 req->r_callback = linger_commit_cb;
3007 mutex_unlock(&lreq->lock);
3009 req->r_priv = linger_get(lreq);
3010 req->r_linger = true;
3012 submit_request(req, true);
3015 static void linger_ping_cb(struct ceph_osd_request *req)
3017 struct ceph_osd_linger_request *lreq = req->r_priv;
3019 mutex_lock(&lreq->lock);
3020 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3021 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3023 if (lreq->register_gen == req->r_ops[0].watch.gen) {
3024 if (!req->r_result) {
3025 lreq->watch_valid_thru = lreq->ping_sent;
3026 } else if (!lreq->last_error) {
3027 lreq->last_error = normalize_watch_error(req->r_result);
3028 queue_watch_error(lreq);
3031 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3032 lreq->register_gen, req->r_ops[0].watch.gen);
3035 mutex_unlock(&lreq->lock);
3039 static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3041 struct ceph_osd_client *osdc = lreq->osdc;
3042 struct ceph_osd_request *req = lreq->ping_req;
3043 struct ceph_osd_req_op *op = &req->r_ops[0];
3045 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
3046 dout("%s PAUSERD\n", __func__);
3050 lreq->ping_sent = jiffies;
3051 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3052 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3053 lreq->register_gen);
3056 cancel_linger_request(req);
3058 request_reinit(req);
3059 target_copy(&req->r_t, &lreq->t);
3061 WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3062 op->watch.cookie != lreq->linger_id ||
3063 op->watch.op != CEPH_OSD_WATCH_OP_PING);
3064 op->watch.gen = lreq->register_gen;
3065 req->r_callback = linger_ping_cb;
3066 req->r_priv = linger_get(lreq);
3067 req->r_linger = true;
3069 ceph_osdc_get_request(req);
3070 account_request(req);
3071 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3072 link_request(lreq->osd, req);
3076 static void linger_submit(struct ceph_osd_linger_request *lreq)
3078 struct ceph_osd_client *osdc = lreq->osdc;
3079 struct ceph_osd *osd;
3081 down_write(&osdc->lock);
3082 linger_register(lreq);
3083 if (lreq->is_watch) {
3084 lreq->reg_req->r_ops[0].watch.cookie = lreq->linger_id;
3085 lreq->ping_req->r_ops[0].watch.cookie = lreq->linger_id;
3087 lreq->reg_req->r_ops[0].notify.cookie = lreq->linger_id;
3090 calc_target(osdc, &lreq->t, NULL, false);
3091 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3092 link_linger(osd, lreq);
3095 up_write(&osdc->lock);
3098 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3100 struct ceph_osd_client *osdc = lreq->osdc;
3101 struct ceph_osd_linger_request *lookup_lreq;
3103 verify_osdc_wrlocked(osdc);
3105 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3110 WARN_ON(lookup_lreq != lreq);
3111 erase_linger_mc(&osdc->linger_map_checks, lreq);
3116 * @lreq has to be both registered and linked.
3118 static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3120 if (lreq->is_watch && lreq->ping_req->r_osd)
3121 cancel_linger_request(lreq->ping_req);
3122 if (lreq->reg_req->r_osd)
3123 cancel_linger_request(lreq->reg_req);
3124 cancel_linger_map_check(lreq);
3125 unlink_linger(lreq->osd, lreq);
3126 linger_unregister(lreq);
3129 static void linger_cancel(struct ceph_osd_linger_request *lreq)
3131 struct ceph_osd_client *osdc = lreq->osdc;
3133 down_write(&osdc->lock);
3134 if (__linger_registered(lreq))
3135 __linger_cancel(lreq);
3136 up_write(&osdc->lock);
3139 static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3141 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3143 struct ceph_osd_client *osdc = lreq->osdc;
3144 struct ceph_osdmap *map = osdc->osdmap;
3146 verify_osdc_wrlocked(osdc);
3147 WARN_ON(!map->epoch);
3149 if (lreq->register_gen) {
3150 lreq->map_dne_bound = map->epoch;
3151 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3152 lreq, lreq->linger_id);
3154 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3155 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3159 if (lreq->map_dne_bound) {
3160 if (map->epoch >= lreq->map_dne_bound) {
3161 /* we had a new enough map */
3162 pr_info("linger_id %llu pool does not exist\n",
3164 linger_reg_commit_complete(lreq, -ENOENT);
3165 __linger_cancel(lreq);
3168 send_linger_map_check(lreq);
3172 static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3174 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3175 struct ceph_osd_linger_request *lreq;
3176 u64 linger_id = greq->private_data;
3178 WARN_ON(greq->result || !greq->u.newest);
3180 down_write(&osdc->lock);
3181 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3183 dout("%s linger_id %llu dne\n", __func__, linger_id);
3187 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3188 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3190 if (!lreq->map_dne_bound)
3191 lreq->map_dne_bound = greq->u.newest;
3192 erase_linger_mc(&osdc->linger_map_checks, lreq);
3193 check_linger_pool_dne(lreq);
3197 up_write(&osdc->lock);
3200 static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3202 struct ceph_osd_client *osdc = lreq->osdc;
3203 struct ceph_osd_linger_request *lookup_lreq;
3206 verify_osdc_wrlocked(osdc);
3208 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3211 WARN_ON(lookup_lreq != lreq);
3216 insert_linger_mc(&osdc->linger_map_checks, lreq);
3217 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3218 linger_map_check_cb, lreq->linger_id);
3222 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3226 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3227 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3228 return ret ?: lreq->reg_commit_error;
3231 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
3235 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3236 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3237 return ret ?: lreq->notify_finish_error;
3241 * Timeout callback, called every N seconds. When 1 or more OSD
3242 * requests has been active for more than N seconds, we send a keepalive
3243 * (tag + timestamp) to its OSD to ensure any communications channel
3244 * reset is detected.
3246 static void handle_timeout(struct work_struct *work)
3248 struct ceph_osd_client *osdc =
3249 container_of(work, struct ceph_osd_client, timeout_work.work);
3250 struct ceph_options *opts = osdc->client->options;
3251 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3252 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3253 LIST_HEAD(slow_osds);
3254 struct rb_node *n, *p;
3256 dout("%s osdc %p\n", __func__, osdc);
3257 down_write(&osdc->lock);
3260 * ping osds that are a bit slow. this ensures that if there
3261 * is a break in the TCP connection we will notice, and reopen
3262 * a connection with that osd (from the fault callback).
3264 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3265 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3268 for (p = rb_first(&osd->o_requests); p; ) {
3269 struct ceph_osd_request *req =
3270 rb_entry(p, struct ceph_osd_request, r_node);
3272 p = rb_next(p); /* abort_request() */
3274 if (time_before(req->r_stamp, cutoff)) {
3275 dout(" req %p tid %llu on osd%d is laggy\n",
3276 req, req->r_tid, osd->o_osd);
3279 if (opts->osd_request_timeout &&
3280 time_before(req->r_start_stamp, expiry_cutoff)) {
3281 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3282 req->r_tid, osd->o_osd);
3283 abort_request(req, -ETIMEDOUT);
3286 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3287 struct ceph_osd_linger_request *lreq =
3288 rb_entry(p, struct ceph_osd_linger_request, node);
3290 dout(" lreq %p linger_id %llu is served by osd%d\n",
3291 lreq, lreq->linger_id, osd->o_osd);
3294 mutex_lock(&lreq->lock);
3295 if (lreq->is_watch && lreq->committed && !lreq->last_error)
3296 send_linger_ping(lreq);
3297 mutex_unlock(&lreq->lock);
3301 list_move_tail(&osd->o_keepalive_item, &slow_osds);
3304 if (opts->osd_request_timeout) {
3305 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3306 struct ceph_osd_request *req =
3307 rb_entry(p, struct ceph_osd_request, r_node);
3309 p = rb_next(p); /* abort_request() */
3311 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3312 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3313 req->r_tid, osdc->homeless_osd.o_osd);
3314 abort_request(req, -ETIMEDOUT);
3319 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3320 maybe_request_map(osdc);
3322 while (!list_empty(&slow_osds)) {
3323 struct ceph_osd *osd = list_first_entry(&slow_osds,
3326 list_del_init(&osd->o_keepalive_item);
3327 ceph_con_keepalive(&osd->o_con);
3330 up_write(&osdc->lock);
3331 schedule_delayed_work(&osdc->timeout_work,
3332 osdc->client->options->osd_keepalive_timeout);
3335 static void handle_osds_timeout(struct work_struct *work)
3337 struct ceph_osd_client *osdc =
3338 container_of(work, struct ceph_osd_client,
3339 osds_timeout_work.work);
3340 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3341 struct ceph_osd *osd, *nosd;
3343 dout("%s osdc %p\n", __func__, osdc);
3344 down_write(&osdc->lock);
3345 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3346 if (time_before(jiffies, osd->lru_ttl))
3349 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3350 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3354 up_write(&osdc->lock);
3355 schedule_delayed_work(&osdc->osds_timeout_work,
3356 round_jiffies_relative(delay));
3359 static int ceph_oloc_decode(void **p, void *end,
3360 struct ceph_object_locator *oloc)
3362 u8 struct_v, struct_cv;
3367 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3368 struct_v = ceph_decode_8(p);
3369 struct_cv = ceph_decode_8(p);
3371 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3372 struct_v, struct_cv);
3375 if (struct_cv > 6) {
3376 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3377 struct_v, struct_cv);
3380 len = ceph_decode_32(p);
3381 ceph_decode_need(p, end, len, e_inval);
3382 struct_end = *p + len;
3384 oloc->pool = ceph_decode_64(p);
3385 *p += 4; /* skip preferred */
3387 len = ceph_decode_32(p);
3389 pr_warn("ceph_object_locator::key is set\n");
3393 if (struct_v >= 5) {
3394 bool changed = false;
3396 len = ceph_decode_32(p);
3398 ceph_decode_need(p, end, len, e_inval);
3399 if (!oloc->pool_ns ||
3400 ceph_compare_string(oloc->pool_ns, *p, len))
3408 /* redirect changes namespace */
3409 pr_warn("ceph_object_locator::nspace is changed\n");
3414 if (struct_v >= 6) {
3415 s64 hash = ceph_decode_64(p);
3417 pr_warn("ceph_object_locator::hash is set\n");
3432 static int ceph_redirect_decode(void **p, void *end,
3433 struct ceph_request_redirect *redir)
3435 u8 struct_v, struct_cv;
3440 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3441 struct_v = ceph_decode_8(p);
3442 struct_cv = ceph_decode_8(p);
3443 if (struct_cv > 1) {
3444 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3445 struct_v, struct_cv);
3448 len = ceph_decode_32(p);
3449 ceph_decode_need(p, end, len, e_inval);
3450 struct_end = *p + len;
3452 ret = ceph_oloc_decode(p, end, &redir->oloc);
3456 len = ceph_decode_32(p);
3458 pr_warn("ceph_request_redirect::object_name is set\n");
3462 len = ceph_decode_32(p);
3463 *p += len; /* skip osd_instructions */
3475 struct MOSDOpReply {
3476 struct ceph_pg pgid;
3481 u32 outdata_len[CEPH_OSD_MAX_OPS];
3482 s32 rval[CEPH_OSD_MAX_OPS];
3484 struct ceph_eversion replay_version;
3486 struct ceph_request_redirect redirect;
3489 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
3491 void *p = msg->front.iov_base;
3492 void *const end = p + msg->front.iov_len;
3493 u16 version = le16_to_cpu(msg->hdr.version);
3494 struct ceph_eversion bad_replay_version;
3500 ceph_decode_32_safe(&p, end, len, e_inval);
3501 ceph_decode_need(&p, end, len, e_inval);
3502 p += len; /* skip oid */
3504 ret = ceph_decode_pgid(&p, end, &m->pgid);
3508 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3509 ceph_decode_32_safe(&p, end, m->result, e_inval);
3510 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3511 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3512 p += sizeof(bad_replay_version);
3513 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
3515 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3516 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3519 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3521 for (i = 0; i < m->num_ops; i++) {
3522 struct ceph_osd_op *op = p;
3524 m->outdata_len[i] = le32_to_cpu(op->payload_len);
3528 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3529 for (i = 0; i < m->num_ops; i++)
3530 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
3533 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3534 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3535 p += sizeof(m->replay_version);
3536 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3538 m->replay_version = bad_replay_version; /* struct */
3539 m->user_version = le64_to_cpu(m->replay_version.version);
3544 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
3552 ret = ceph_redirect_decode(&p, end, &m->redirect);
3556 ceph_oloc_init(&m->redirect.oloc);
3566 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3569 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3571 struct ceph_osd_client *osdc = osd->o_osdc;
3572 struct ceph_osd_request *req;
3573 struct MOSDOpReply m;
3574 u64 tid = le64_to_cpu(msg->hdr.tid);
3579 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3581 down_read(&osdc->lock);
3582 if (!osd_registered(osd)) {
3583 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3584 goto out_unlock_osdc;
3586 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3588 mutex_lock(&osd->lock);
3589 req = lookup_request(&osd->o_requests, tid);
3591 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3592 goto out_unlock_session;
3595 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3596 ret = decode_MOSDOpReply(msg, &m);
3597 m.redirect.oloc.pool_ns = NULL;
3599 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3604 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3605 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3606 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3607 le64_to_cpu(m.replay_version.version), m.user_version);
3609 if (m.retry_attempt >= 0) {
3610 if (m.retry_attempt != req->r_attempts - 1) {
3611 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3612 req, req->r_tid, m.retry_attempt,
3613 req->r_attempts - 1);
3614 goto out_unlock_session;
3617 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3620 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3621 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3622 m.redirect.oloc.pool);
3623 unlink_request(osd, req);
3624 mutex_unlock(&osd->lock);
3627 * Not ceph_oloc_copy() - changing pool_ns is not
3630 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3631 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
3633 __submit_request(req, false);
3634 goto out_unlock_osdc;
3637 if (m.num_ops != req->r_num_ops) {
3638 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3639 req->r_num_ops, req->r_tid);
3642 for (i = 0; i < req->r_num_ops; i++) {
3643 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3644 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3645 req->r_ops[i].rval = m.rval[i];
3646 req->r_ops[i].outdata_len = m.outdata_len[i];
3647 data_len += m.outdata_len[i];
3649 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3650 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3651 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3654 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3655 req, req->r_tid, m.result, data_len);
3658 * Since we only ever request ONDISK, we should only ever get
3659 * one (type of) reply back.
3661 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3662 req->r_result = m.result ?: data_len;
3663 finish_request(req);
3664 mutex_unlock(&osd->lock);
3665 up_read(&osdc->lock);
3667 __complete_request(req);
3671 complete_request(req, -EIO);
3673 mutex_unlock(&osd->lock);
3675 up_read(&osdc->lock);
3678 static void set_pool_was_full(struct ceph_osd_client *osdc)
3682 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3683 struct ceph_pg_pool_info *pi =
3684 rb_entry(n, struct ceph_pg_pool_info, node);
3686 pi->was_full = __pool_full(pi);
3690 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
3692 struct ceph_pg_pool_info *pi;
3694 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3698 return pi->was_full && !__pool_full(pi);
3701 static enum calc_target_result
3702 recalc_linger_target(struct ceph_osd_linger_request *lreq)
3704 struct ceph_osd_client *osdc = lreq->osdc;
3705 enum calc_target_result ct_res;
3707 ct_res = calc_target(osdc, &lreq->t, NULL, true);
3708 if (ct_res == CALC_TARGET_NEED_RESEND) {
3709 struct ceph_osd *osd;
3711 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3712 if (osd != lreq->osd) {
3713 unlink_linger(lreq->osd, lreq);
3714 link_linger(osd, lreq);
3722 * Requeue requests whose mapping to an OSD has changed.
3724 static void scan_requests(struct ceph_osd *osd,
3727 bool check_pool_cleared_full,
3728 struct rb_root *need_resend,
3729 struct list_head *need_resend_linger)
3731 struct ceph_osd_client *osdc = osd->o_osdc;
3733 bool force_resend_writes;
3735 for (n = rb_first(&osd->o_linger_requests); n; ) {
3736 struct ceph_osd_linger_request *lreq =
3737 rb_entry(n, struct ceph_osd_linger_request, node);
3738 enum calc_target_result ct_res;
3740 n = rb_next(n); /* recalc_linger_target() */
3742 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3744 ct_res = recalc_linger_target(lreq);
3746 case CALC_TARGET_NO_ACTION:
3747 force_resend_writes = cleared_full ||
3748 (check_pool_cleared_full &&
3749 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3750 if (!force_resend && !force_resend_writes)
3754 case CALC_TARGET_NEED_RESEND:
3755 cancel_linger_map_check(lreq);
3757 * scan_requests() for the previous epoch(s)
3758 * may have already added it to the list, since
3759 * it's not unlinked here.
3761 if (list_empty(&lreq->scan_item))
3762 list_add_tail(&lreq->scan_item, need_resend_linger);
3764 case CALC_TARGET_POOL_DNE:
3765 list_del_init(&lreq->scan_item);
3766 check_linger_pool_dne(lreq);
3771 for (n = rb_first(&osd->o_requests); n; ) {
3772 struct ceph_osd_request *req =
3773 rb_entry(n, struct ceph_osd_request, r_node);
3774 enum calc_target_result ct_res;
3776 n = rb_next(n); /* unlink_request(), check_pool_dne() */
3778 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3779 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
3782 case CALC_TARGET_NO_ACTION:
3783 force_resend_writes = cleared_full ||
3784 (check_pool_cleared_full &&
3785 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3786 if (!force_resend &&
3787 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3788 !force_resend_writes))
3792 case CALC_TARGET_NEED_RESEND:
3793 cancel_map_check(req);
3794 unlink_request(osd, req);
3795 insert_request(need_resend, req);
3797 case CALC_TARGET_POOL_DNE:
3798 check_pool_dne(req);
3804 static int handle_one_map(struct ceph_osd_client *osdc,
3805 void *p, void *end, bool incremental,
3806 struct rb_root *need_resend,
3807 struct list_head *need_resend_linger)
3809 struct ceph_osdmap *newmap;
3811 bool skipped_map = false;
3814 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3815 set_pool_was_full(osdc);
3818 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3820 newmap = ceph_osdmap_decode(&p, end);
3822 return PTR_ERR(newmap);
3824 if (newmap != osdc->osdmap) {
3826 * Preserve ->was_full before destroying the old map.
3827 * For pools that weren't in the old map, ->was_full
3830 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3831 struct ceph_pg_pool_info *pi =
3832 rb_entry(n, struct ceph_pg_pool_info, node);
3833 struct ceph_pg_pool_info *old_pi;
3835 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3837 pi->was_full = old_pi->was_full;
3839 WARN_ON(pi->was_full);
3842 if (osdc->osdmap->epoch &&
3843 osdc->osdmap->epoch + 1 < newmap->epoch) {
3844 WARN_ON(incremental);
3848 ceph_osdmap_destroy(osdc->osdmap);
3849 osdc->osdmap = newmap;
3852 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3853 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3854 need_resend, need_resend_linger);
3856 for (n = rb_first(&osdc->osds); n; ) {
3857 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3859 n = rb_next(n); /* close_osd() */
3861 scan_requests(osd, skipped_map, was_full, true, need_resend,
3862 need_resend_linger);
3863 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3864 memcmp(&osd->o_con.peer_addr,
3865 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3866 sizeof(struct ceph_entity_addr)))
3873 static void kick_requests(struct ceph_osd_client *osdc,
3874 struct rb_root *need_resend,
3875 struct list_head *need_resend_linger)
3877 struct ceph_osd_linger_request *lreq, *nlreq;
3878 enum calc_target_result ct_res;
3881 /* make sure need_resend targets reflect latest map */
3882 for (n = rb_first(need_resend); n; ) {
3883 struct ceph_osd_request *req =
3884 rb_entry(n, struct ceph_osd_request, r_node);
3888 if (req->r_t.epoch < osdc->osdmap->epoch) {
3889 ct_res = calc_target(osdc, &req->r_t, NULL, false);
3890 if (ct_res == CALC_TARGET_POOL_DNE) {
3891 erase_request(need_resend, req);
3892 check_pool_dne(req);
3897 for (n = rb_first(need_resend); n; ) {
3898 struct ceph_osd_request *req =
3899 rb_entry(n, struct ceph_osd_request, r_node);
3900 struct ceph_osd *osd;
3903 erase_request(need_resend, req); /* before link_request() */
3905 osd = lookup_create_osd(osdc, req->r_t.osd, true);
3906 link_request(osd, req);
3907 if (!req->r_linger) {
3908 if (!osd_homeless(osd) && !req->r_t.paused)
3911 cancel_linger_request(req);
3915 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
3916 if (!osd_homeless(lreq->osd))
3919 list_del_init(&lreq->scan_item);
3924 * Process updated osd map.
3926 * The message contains any number of incremental and full maps, normally
3927 * indicating some sort of topology change in the cluster. Kick requests
3928 * off to different OSDs as needed.
3930 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
3932 void *p = msg->front.iov_base;
3933 void *const end = p + msg->front.iov_len;
3934 u32 nr_maps, maplen;
3936 struct ceph_fsid fsid;
3937 struct rb_root need_resend = RB_ROOT;
3938 LIST_HEAD(need_resend_linger);
3939 bool handled_incremental = false;
3940 bool was_pauserd, was_pausewr;
3941 bool pauserd, pausewr;
3944 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
3945 down_write(&osdc->lock);
3948 ceph_decode_need(&p, end, sizeof(fsid), bad);
3949 ceph_decode_copy(&p, &fsid, sizeof(fsid));
3950 if (ceph_check_fsid(osdc->client, &fsid) < 0)
3953 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
3954 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
3955 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
3956 have_pool_full(osdc);
3958 /* incremental maps */
3959 ceph_decode_32_safe(&p, end, nr_maps, bad);
3960 dout(" %d inc maps\n", nr_maps);
3961 while (nr_maps > 0) {
3962 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3963 epoch = ceph_decode_32(&p);
3964 maplen = ceph_decode_32(&p);
3965 ceph_decode_need(&p, end, maplen, bad);
3966 if (osdc->osdmap->epoch &&
3967 osdc->osdmap->epoch + 1 == epoch) {
3968 dout("applying incremental map %u len %d\n",
3970 err = handle_one_map(osdc, p, p + maplen, true,
3971 &need_resend, &need_resend_linger);
3974 handled_incremental = true;
3976 dout("ignoring incremental map %u len %d\n",
3982 if (handled_incremental)
3986 ceph_decode_32_safe(&p, end, nr_maps, bad);
3987 dout(" %d full maps\n", nr_maps);
3989 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3990 epoch = ceph_decode_32(&p);
3991 maplen = ceph_decode_32(&p);
3992 ceph_decode_need(&p, end, maplen, bad);
3994 dout("skipping non-latest full map %u len %d\n",
3996 } else if (osdc->osdmap->epoch >= epoch) {
3997 dout("skipping full map %u len %d, "
3998 "older than our %u\n", epoch, maplen,
3999 osdc->osdmap->epoch);
4001 dout("taking full map %u len %d\n", epoch, maplen);
4002 err = handle_one_map(osdc, p, p + maplen, false,
4003 &need_resend, &need_resend_linger);
4013 * subscribe to subsequent osdmap updates if full to ensure
4014 * we find out when we are no longer full and stop returning
4017 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4018 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4019 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4020 have_pool_full(osdc);
4021 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4022 osdc->osdmap->epoch < osdc->epoch_barrier)
4023 maybe_request_map(osdc);
4025 kick_requests(osdc, &need_resend, &need_resend_linger);
4027 ceph_osdc_abort_on_full(osdc);
4028 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4029 osdc->osdmap->epoch);
4030 up_write(&osdc->lock);
4031 wake_up_all(&osdc->client->auth_wq);
4035 pr_err("osdc handle_map corrupt msg\n");
4037 up_write(&osdc->lock);
4041 * Resubmit requests pending on the given osd.
4043 static void kick_osd_requests(struct ceph_osd *osd)
4047 clear_backoffs(osd);
4049 for (n = rb_first(&osd->o_requests); n; ) {
4050 struct ceph_osd_request *req =
4051 rb_entry(n, struct ceph_osd_request, r_node);
4053 n = rb_next(n); /* cancel_linger_request() */
4055 if (!req->r_linger) {
4056 if (!req->r_t.paused)
4059 cancel_linger_request(req);
4062 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4063 struct ceph_osd_linger_request *lreq =
4064 rb_entry(n, struct ceph_osd_linger_request, node);
4071 * If the osd connection drops, we need to resubmit all requests.
4073 static void osd_fault(struct ceph_connection *con)
4075 struct ceph_osd *osd = con->private;
4076 struct ceph_osd_client *osdc = osd->o_osdc;
4078 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4080 down_write(&osdc->lock);
4081 if (!osd_registered(osd)) {
4082 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4086 if (!reopen_osd(osd))
4087 kick_osd_requests(osd);
4088 maybe_request_map(osdc);
4091 up_write(&osdc->lock);
4094 struct MOSDBackoff {
4095 struct ceph_spg spgid;
4099 struct ceph_hobject_id *begin;
4100 struct ceph_hobject_id *end;
4103 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4105 void *p = msg->front.iov_base;
4106 void *const end = p + msg->front.iov_len;
4111 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4115 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4119 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4120 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4121 ceph_decode_8_safe(&p, end, m->op, e_inval);
4122 ceph_decode_64_safe(&p, end, m->id, e_inval);
4124 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4128 ret = decode_hoid(&p, end, m->begin);
4130 free_hoid(m->begin);
4134 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4136 free_hoid(m->begin);
4140 ret = decode_hoid(&p, end, m->end);
4142 free_hoid(m->begin);
4153 static struct ceph_msg *create_backoff_message(
4154 const struct ceph_osd_backoff *backoff,
4157 struct ceph_msg *msg;
4161 msg_size = CEPH_ENCODING_START_BLK_LEN +
4162 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4163 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4164 msg_size += CEPH_ENCODING_START_BLK_LEN +
4165 hoid_encoding_size(backoff->begin);
4166 msg_size += CEPH_ENCODING_START_BLK_LEN +
4167 hoid_encoding_size(backoff->end);
4169 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4173 p = msg->front.iov_base;
4174 end = p + msg->front_alloc_len;
4176 encode_spgid(&p, &backoff->spgid);
4177 ceph_encode_32(&p, map_epoch);
4178 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4179 ceph_encode_64(&p, backoff->id);
4180 encode_hoid(&p, end, backoff->begin);
4181 encode_hoid(&p, end, backoff->end);
4184 msg->front.iov_len = p - msg->front.iov_base;
4185 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4186 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4191 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4193 struct ceph_spg_mapping *spg;
4194 struct ceph_osd_backoff *backoff;
4195 struct ceph_msg *msg;
4197 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4198 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4200 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4202 spg = alloc_spg_mapping();
4204 pr_err("%s failed to allocate spg\n", __func__);
4207 spg->spgid = m->spgid; /* struct */
4208 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4211 backoff = alloc_backoff();
4213 pr_err("%s failed to allocate backoff\n", __func__);
4216 backoff->spgid = m->spgid; /* struct */
4217 backoff->id = m->id;
4218 backoff->begin = m->begin;
4219 m->begin = NULL; /* backoff now owns this */
4220 backoff->end = m->end;
4221 m->end = NULL; /* ditto */
4223 insert_backoff(&spg->backoffs, backoff);
4224 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4227 * Ack with original backoff's epoch so that the OSD can
4228 * discard this if there was a PG split.
4230 msg = create_backoff_message(backoff, m->map_epoch);
4232 pr_err("%s failed to allocate msg\n", __func__);
4235 ceph_con_send(&osd->o_con, msg);
4238 static bool target_contained_by(const struct ceph_osd_request_target *t,
4239 const struct ceph_hobject_id *begin,
4240 const struct ceph_hobject_id *end)
4242 struct ceph_hobject_id hoid;
4245 hoid_fill_from_target(&hoid, t);
4246 cmp = hoid_compare(&hoid, begin);
4247 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4250 static void handle_backoff_unblock(struct ceph_osd *osd,
4251 const struct MOSDBackoff *m)
4253 struct ceph_spg_mapping *spg;
4254 struct ceph_osd_backoff *backoff;
4257 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4258 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4260 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4262 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4263 __func__, osd->o_osd, m->spgid.pgid.pool,
4264 m->spgid.pgid.seed, m->spgid.shard, m->id);
4268 if (hoid_compare(backoff->begin, m->begin) &&
4269 hoid_compare(backoff->end, m->end)) {
4270 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4271 __func__, osd->o_osd, m->spgid.pgid.pool,
4272 m->spgid.pgid.seed, m->spgid.shard, m->id);
4273 /* unblock it anyway... */
4276 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4279 erase_backoff(&spg->backoffs, backoff);
4280 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4281 free_backoff(backoff);
4283 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4284 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4285 free_spg_mapping(spg);
4288 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4289 struct ceph_osd_request *req =
4290 rb_entry(n, struct ceph_osd_request, r_node);
4292 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4294 * Match against @m, not @backoff -- the PG may
4295 * have split on the OSD.
4297 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4299 * If no other installed backoff applies,
4308 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4310 struct ceph_osd_client *osdc = osd->o_osdc;
4311 struct MOSDBackoff m;
4314 down_read(&osdc->lock);
4315 if (!osd_registered(osd)) {
4316 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4317 up_read(&osdc->lock);
4320 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4322 mutex_lock(&osd->lock);
4323 ret = decode_MOSDBackoff(msg, &m);
4325 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4331 case CEPH_OSD_BACKOFF_OP_BLOCK:
4332 handle_backoff_block(osd, &m);
4334 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4335 handle_backoff_unblock(osd, &m);
4338 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4345 mutex_unlock(&osd->lock);
4346 up_read(&osdc->lock);
4350 * Process osd watch notifications
4352 static void handle_watch_notify(struct ceph_osd_client *osdc,
4353 struct ceph_msg *msg)
4355 void *p = msg->front.iov_base;
4356 void *const end = p + msg->front.iov_len;
4357 struct ceph_osd_linger_request *lreq;
4358 struct linger_work *lwork;
4359 u8 proto_ver, opcode;
4360 u64 cookie, notify_id;
4361 u64 notifier_id = 0;
4362 s32 return_code = 0;
4363 void *payload = NULL;
4364 u32 payload_len = 0;
4366 ceph_decode_8_safe(&p, end, proto_ver, bad);
4367 ceph_decode_8_safe(&p, end, opcode, bad);
4368 ceph_decode_64_safe(&p, end, cookie, bad);
4369 p += 8; /* skip ver */
4370 ceph_decode_64_safe(&p, end, notify_id, bad);
4372 if (proto_ver >= 1) {
4373 ceph_decode_32_safe(&p, end, payload_len, bad);
4374 ceph_decode_need(&p, end, payload_len, bad);
4379 if (le16_to_cpu(msg->hdr.version) >= 2)
4380 ceph_decode_32_safe(&p, end, return_code, bad);
4382 if (le16_to_cpu(msg->hdr.version) >= 3)
4383 ceph_decode_64_safe(&p, end, notifier_id, bad);
4385 down_read(&osdc->lock);
4386 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4388 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4390 goto out_unlock_osdc;
4393 mutex_lock(&lreq->lock);
4394 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4395 opcode, cookie, lreq, lreq->is_watch);
4396 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4397 if (!lreq->last_error) {
4398 lreq->last_error = -ENOTCONN;
4399 queue_watch_error(lreq);
4401 } else if (!lreq->is_watch) {
4402 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4403 if (lreq->notify_id && lreq->notify_id != notify_id) {
4404 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4405 lreq->notify_id, notify_id);
4406 } else if (!completion_done(&lreq->notify_finish_wait)) {
4407 struct ceph_msg_data *data =
4408 msg->num_data_items ? &msg->data[0] : NULL;
4411 if (lreq->preply_pages) {
4412 WARN_ON(data->type !=
4413 CEPH_MSG_DATA_PAGES);
4414 *lreq->preply_pages = data->pages;
4415 *lreq->preply_len = data->length;
4417 ceph_release_page_vector(data->pages,
4418 calc_pages_for(0, data->length));
4421 lreq->notify_finish_error = return_code;
4422 complete_all(&lreq->notify_finish_wait);
4425 /* CEPH_WATCH_EVENT_NOTIFY */
4426 lwork = lwork_alloc(lreq, do_watch_notify);
4428 pr_err("failed to allocate notify-lwork\n");
4429 goto out_unlock_lreq;
4432 lwork->notify.notify_id = notify_id;
4433 lwork->notify.notifier_id = notifier_id;
4434 lwork->notify.payload = payload;
4435 lwork->notify.payload_len = payload_len;
4436 lwork->notify.msg = ceph_msg_get(msg);
4441 mutex_unlock(&lreq->lock);
4443 up_read(&osdc->lock);
4447 pr_err("osdc handle_watch_notify corrupt msg\n");
4451 * Register request, send initial attempt.
4453 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4454 struct ceph_osd_request *req,
4457 down_read(&osdc->lock);
4458 submit_request(req, false);
4459 up_read(&osdc->lock);
4463 EXPORT_SYMBOL(ceph_osdc_start_request);
4466 * Unregister a registered request. The request is not completed:
4467 * ->r_result isn't set and __complete_request() isn't called.
4469 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4471 struct ceph_osd_client *osdc = req->r_osdc;
4473 down_write(&osdc->lock);
4475 cancel_request(req);
4476 up_write(&osdc->lock);
4478 EXPORT_SYMBOL(ceph_osdc_cancel_request);
4481 * @timeout: in jiffies, 0 means "wait forever"
4483 static int wait_request_timeout(struct ceph_osd_request *req,
4484 unsigned long timeout)
4488 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4489 left = wait_for_completion_killable_timeout(&req->r_completion,
4490 ceph_timeout_jiffies(timeout));
4492 left = left ?: -ETIMEDOUT;
4493 ceph_osdc_cancel_request(req);
4495 left = req->r_result; /* completed */
4502 * wait for a request to complete
4504 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4505 struct ceph_osd_request *req)
4507 return wait_request_timeout(req, 0);
4509 EXPORT_SYMBOL(ceph_osdc_wait_request);
4512 * sync - wait for all in-flight requests to flush. avoid starvation.
4514 void ceph_osdc_sync(struct ceph_osd_client *osdc)
4516 struct rb_node *n, *p;
4517 u64 last_tid = atomic64_read(&osdc->last_tid);
4520 down_read(&osdc->lock);
4521 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4522 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4524 mutex_lock(&osd->lock);
4525 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4526 struct ceph_osd_request *req =
4527 rb_entry(p, struct ceph_osd_request, r_node);
4529 if (req->r_tid > last_tid)
4532 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4535 ceph_osdc_get_request(req);
4536 mutex_unlock(&osd->lock);
4537 up_read(&osdc->lock);
4538 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4539 __func__, req, req->r_tid, last_tid);
4540 wait_for_completion(&req->r_completion);
4541 ceph_osdc_put_request(req);
4545 mutex_unlock(&osd->lock);
4548 up_read(&osdc->lock);
4549 dout("%s done last_tid %llu\n", __func__, last_tid);
4551 EXPORT_SYMBOL(ceph_osdc_sync);
4553 static struct ceph_osd_request *
4554 alloc_linger_request(struct ceph_osd_linger_request *lreq)
4556 struct ceph_osd_request *req;
4558 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4562 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4563 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4567 static struct ceph_osd_request *
4568 alloc_watch_request(struct ceph_osd_linger_request *lreq, u8 watch_opcode)
4570 struct ceph_osd_request *req;
4572 req = alloc_linger_request(lreq);
4577 * Pass 0 for cookie because we don't know it yet, it will be
4578 * filled in by linger_submit().
4580 osd_req_op_watch_init(req, 0, 0, watch_opcode);
4582 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4583 ceph_osdc_put_request(req);
4591 * Returns a handle, caller owns a ref.
4593 struct ceph_osd_linger_request *
4594 ceph_osdc_watch(struct ceph_osd_client *osdc,
4595 struct ceph_object_id *oid,
4596 struct ceph_object_locator *oloc,
4597 rados_watchcb2_t wcb,
4598 rados_watcherrcb_t errcb,
4601 struct ceph_osd_linger_request *lreq;
4604 lreq = linger_alloc(osdc);
4606 return ERR_PTR(-ENOMEM);
4608 lreq->is_watch = true;
4610 lreq->errcb = errcb;
4612 lreq->watch_valid_thru = jiffies;
4614 ceph_oid_copy(&lreq->t.base_oid, oid);
4615 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4616 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4617 ktime_get_real_ts64(&lreq->mtime);
4619 lreq->reg_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_WATCH);
4620 if (!lreq->reg_req) {
4625 lreq->ping_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_PING);
4626 if (!lreq->ping_req) {
4631 linger_submit(lreq);
4632 ret = linger_reg_commit_wait(lreq);
4634 linger_cancel(lreq);
4642 return ERR_PTR(ret);
4644 EXPORT_SYMBOL(ceph_osdc_watch);
4649 * Times out after mount_timeout to preserve rbd unmap behaviour
4650 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4651 * with mount_timeout").
4653 int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4654 struct ceph_osd_linger_request *lreq)
4656 struct ceph_options *opts = osdc->client->options;
4657 struct ceph_osd_request *req;
4660 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4664 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4665 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4666 req->r_flags = CEPH_OSD_FLAG_WRITE;
4667 ktime_get_real_ts64(&req->r_mtime);
4668 osd_req_op_watch_init(req, 0, lreq->linger_id,
4669 CEPH_OSD_WATCH_OP_UNWATCH);
4671 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4675 ceph_osdc_start_request(osdc, req, false);
4676 linger_cancel(lreq);
4678 ret = wait_request_timeout(req, opts->mount_timeout);
4681 ceph_osdc_put_request(req);
4684 EXPORT_SYMBOL(ceph_osdc_unwatch);
4686 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4687 u64 notify_id, u64 cookie, void *payload,
4690 struct ceph_osd_req_op *op;
4691 struct ceph_pagelist *pl;
4694 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4696 pl = ceph_pagelist_alloc(GFP_NOIO);
4700 ret = ceph_pagelist_encode_64(pl, notify_id);
4701 ret |= ceph_pagelist_encode_64(pl, cookie);
4703 ret |= ceph_pagelist_encode_32(pl, payload_len);
4704 ret |= ceph_pagelist_append(pl, payload, payload_len);
4706 ret |= ceph_pagelist_encode_32(pl, 0);
4709 ceph_pagelist_release(pl);
4713 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4714 op->indata_len = pl->length;
4718 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4719 struct ceph_object_id *oid,
4720 struct ceph_object_locator *oloc,
4726 struct ceph_osd_request *req;
4729 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4733 ceph_oid_copy(&req->r_base_oid, oid);
4734 ceph_oloc_copy(&req->r_base_oloc, oloc);
4735 req->r_flags = CEPH_OSD_FLAG_READ;
4737 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4742 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4746 ceph_osdc_start_request(osdc, req, false);
4747 ret = ceph_osdc_wait_request(osdc, req);
4750 ceph_osdc_put_request(req);
4753 EXPORT_SYMBOL(ceph_osdc_notify_ack);
4755 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4756 u64 cookie, u32 prot_ver, u32 timeout,
4757 void *payload, u32 payload_len)
4759 struct ceph_osd_req_op *op;
4760 struct ceph_pagelist *pl;
4763 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4764 op->notify.cookie = cookie;
4766 pl = ceph_pagelist_alloc(GFP_NOIO);
4770 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4771 ret |= ceph_pagelist_encode_32(pl, timeout);
4772 ret |= ceph_pagelist_encode_32(pl, payload_len);
4773 ret |= ceph_pagelist_append(pl, payload, payload_len);
4775 ceph_pagelist_release(pl);
4779 ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4780 op->indata_len = pl->length;
4785 * @timeout: in seconds
4787 * @preply_{pages,len} are initialized both on success and error.
4788 * The caller is responsible for:
4790 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4792 int ceph_osdc_notify(struct ceph_osd_client *osdc,
4793 struct ceph_object_id *oid,
4794 struct ceph_object_locator *oloc,
4798 struct page ***preply_pages,
4801 struct ceph_osd_linger_request *lreq;
4802 struct page **pages;
4807 *preply_pages = NULL;
4811 lreq = linger_alloc(osdc);
4815 lreq->preply_pages = preply_pages;
4816 lreq->preply_len = preply_len;
4818 ceph_oid_copy(&lreq->t.base_oid, oid);
4819 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4820 lreq->t.flags = CEPH_OSD_FLAG_READ;
4822 lreq->reg_req = alloc_linger_request(lreq);
4823 if (!lreq->reg_req) {
4829 * Pass 0 for cookie because we don't know it yet, it will be
4830 * filled in by linger_submit().
4832 ret = osd_req_op_notify_init(lreq->reg_req, 0, 0, 1, timeout,
4833 payload, payload_len);
4838 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4839 if (IS_ERR(pages)) {
4840 ret = PTR_ERR(pages);
4843 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4845 pages, PAGE_SIZE, 0, false, true);
4847 ret = ceph_osdc_alloc_messages(lreq->reg_req, GFP_NOIO);
4851 linger_submit(lreq);
4852 ret = linger_reg_commit_wait(lreq);
4854 ret = linger_notify_finish_wait(lreq);
4856 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4858 linger_cancel(lreq);
4863 EXPORT_SYMBOL(ceph_osdc_notify);
4866 * Return the number of milliseconds since the watch was last
4867 * confirmed, or an error. If there is an error, the watch is no
4868 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4870 int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4871 struct ceph_osd_linger_request *lreq)
4873 unsigned long stamp, age;
4876 down_read(&osdc->lock);
4877 mutex_lock(&lreq->lock);
4878 stamp = lreq->watch_valid_thru;
4879 if (!list_empty(&lreq->pending_lworks)) {
4880 struct linger_work *lwork =
4881 list_first_entry(&lreq->pending_lworks,
4885 if (time_before(lwork->queued_stamp, stamp))
4886 stamp = lwork->queued_stamp;
4888 age = jiffies - stamp;
4889 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4890 lreq, lreq->linger_id, age, lreq->last_error);
4891 /* we are truncating to msecs, so return a safe upper bound */
4892 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4894 mutex_unlock(&lreq->lock);
4895 up_read(&osdc->lock);
4899 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4905 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4906 &struct_v, &struct_len);
4911 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
4912 ceph_decode_64_safe(p, end, item->cookie, bad);
4913 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
4915 if (struct_v >= 2) {
4916 ret = ceph_decode_entity_addr(p, end, &item->addr);
4923 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4924 ENTITY_NAME(item->name), item->cookie,
4925 ceph_pr_addr(&item->addr));
4930 static int decode_watchers(void **p, void *end,
4931 struct ceph_watch_item **watchers,
4939 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4940 &struct_v, &struct_len);
4944 *num_watchers = ceph_decode_32(p);
4945 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4949 for (i = 0; i < *num_watchers; i++) {
4950 ret = decode_watcher(p, end, *watchers + i);
4961 * On success, the caller is responsible for:
4965 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
4966 struct ceph_object_id *oid,
4967 struct ceph_object_locator *oloc,
4968 struct ceph_watch_item **watchers,
4971 struct ceph_osd_request *req;
4972 struct page **pages;
4975 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4979 ceph_oid_copy(&req->r_base_oid, oid);
4980 ceph_oloc_copy(&req->r_base_oloc, oloc);
4981 req->r_flags = CEPH_OSD_FLAG_READ;
4983 pages = ceph_alloc_page_vector(1, GFP_NOIO);
4984 if (IS_ERR(pages)) {
4985 ret = PTR_ERR(pages);
4989 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
4990 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
4992 pages, PAGE_SIZE, 0, false, true);
4994 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4998 ceph_osdc_start_request(osdc, req, false);
4999 ret = ceph_osdc_wait_request(osdc, req);
5001 void *p = page_address(pages[0]);
5002 void *const end = p + req->r_ops[0].outdata_len;
5004 ret = decode_watchers(&p, end, watchers, num_watchers);
5008 ceph_osdc_put_request(req);
5011 EXPORT_SYMBOL(ceph_osdc_list_watchers);
5014 * Call all pending notify callbacks - for use after a watch is
5015 * unregistered, to make sure no more callbacks for it will be invoked
5017 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
5019 dout("%s osdc %p\n", __func__, osdc);
5020 flush_workqueue(osdc->notify_wq);
5022 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5024 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5026 down_read(&osdc->lock);
5027 maybe_request_map(osdc);
5028 up_read(&osdc->lock);
5030 EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
5033 * Execute an OSD class method on an object.
5035 * @flags: CEPH_OSD_FLAG_*
5036 * @resp_len: in/out param for reply length
5038 int ceph_osdc_call(struct ceph_osd_client *osdc,
5039 struct ceph_object_id *oid,
5040 struct ceph_object_locator *oloc,
5041 const char *class, const char *method,
5043 struct page *req_page, size_t req_len,
5044 struct page **resp_pages, size_t *resp_len)
5046 struct ceph_osd_request *req;
5049 if (req_len > PAGE_SIZE)
5052 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5056 ceph_oid_copy(&req->r_base_oid, oid);
5057 ceph_oloc_copy(&req->r_base_oloc, oloc);
5058 req->r_flags = flags;
5060 ret = osd_req_op_cls_init(req, 0, class, method);
5065 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5068 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
5069 *resp_len, 0, false, false);
5071 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5075 ceph_osdc_start_request(osdc, req, false);
5076 ret = ceph_osdc_wait_request(osdc, req);
5078 ret = req->r_ops[0].rval;
5080 *resp_len = req->r_ops[0].outdata_len;
5084 ceph_osdc_put_request(req);
5087 EXPORT_SYMBOL(ceph_osdc_call);
5092 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5097 osdc->client = client;
5098 init_rwsem(&osdc->lock);
5099 osdc->osds = RB_ROOT;
5100 INIT_LIST_HEAD(&osdc->osd_lru);
5101 spin_lock_init(&osdc->osd_lru_lock);
5102 osd_init(&osdc->homeless_osd);
5103 osdc->homeless_osd.o_osdc = osdc;
5104 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
5105 osdc->last_linger_id = CEPH_LINGER_ID_START;
5106 osdc->linger_requests = RB_ROOT;
5107 osdc->map_checks = RB_ROOT;
5108 osdc->linger_map_checks = RB_ROOT;
5109 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
5110 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5113 osdc->osdmap = ceph_osdmap_alloc();
5117 osdc->req_mempool = mempool_create_slab_pool(10,
5118 ceph_osd_request_cache);
5119 if (!osdc->req_mempool)
5122 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
5123 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
5126 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
5127 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5133 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
5134 if (!osdc->notify_wq)
5135 goto out_msgpool_reply;
5137 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5138 if (!osdc->completion_wq)
5141 schedule_delayed_work(&osdc->timeout_work,
5142 osdc->client->options->osd_keepalive_timeout);
5143 schedule_delayed_work(&osdc->osds_timeout_work,
5144 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5149 destroy_workqueue(osdc->notify_wq);
5151 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5153 ceph_msgpool_destroy(&osdc->msgpool_op);
5155 mempool_destroy(osdc->req_mempool);
5157 ceph_osdmap_destroy(osdc->osdmap);
5162 void ceph_osdc_stop(struct ceph_osd_client *osdc)
5164 destroy_workqueue(osdc->completion_wq);
5165 destroy_workqueue(osdc->notify_wq);
5166 cancel_delayed_work_sync(&osdc->timeout_work);
5167 cancel_delayed_work_sync(&osdc->osds_timeout_work);
5169 down_write(&osdc->lock);
5170 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5171 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5172 struct ceph_osd, o_node);
5175 up_write(&osdc->lock);
5176 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5177 osd_cleanup(&osdc->homeless_osd);
5179 WARN_ON(!list_empty(&osdc->osd_lru));
5180 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
5181 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5182 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5183 WARN_ON(atomic_read(&osdc->num_requests));
5184 WARN_ON(atomic_read(&osdc->num_homeless));
5186 ceph_osdmap_destroy(osdc->osdmap);
5187 mempool_destroy(osdc->req_mempool);
5188 ceph_msgpool_destroy(&osdc->msgpool_op);
5189 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5193 * Read some contiguous pages. If we cross a stripe boundary, shorten
5194 * *plen. Return number of bytes read, or error.
5196 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
5197 struct ceph_vino vino, struct ceph_file_layout *layout,
5199 u32 truncate_seq, u64 truncate_size,
5200 struct page **pages, int num_pages, int page_align)
5202 struct ceph_osd_request *req;
5205 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
5206 vino.snap, off, *plen);
5207 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
5208 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
5209 NULL, truncate_seq, truncate_size,
5212 return PTR_ERR(req);
5214 /* it may be a short read due to an object boundary */
5215 osd_req_op_extent_osd_data_pages(req, 0,
5216 pages, *plen, page_align, false, false);
5218 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
5219 off, *plen, *plen, page_align);
5221 rc = ceph_osdc_start_request(osdc, req, false);
5223 rc = ceph_osdc_wait_request(osdc, req);
5225 ceph_osdc_put_request(req);
5226 dout("readpages result %d\n", rc);
5229 EXPORT_SYMBOL(ceph_osdc_readpages);
5232 * do a synchronous write on N pages
5234 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
5235 struct ceph_file_layout *layout,
5236 struct ceph_snap_context *snapc,
5238 u32 truncate_seq, u64 truncate_size,
5239 struct timespec64 *mtime,
5240 struct page **pages, int num_pages)
5242 struct ceph_osd_request *req;
5244 int page_align = off & ~PAGE_MASK;
5246 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
5247 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
5248 snapc, truncate_seq, truncate_size,
5251 return PTR_ERR(req);
5253 /* it may be a short write due to an object boundary */
5254 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
5256 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
5258 req->r_mtime = *mtime;
5259 rc = ceph_osdc_start_request(osdc, req, true);
5261 rc = ceph_osdc_wait_request(osdc, req);
5263 ceph_osdc_put_request(req);
5266 dout("writepages result %d\n", rc);
5269 EXPORT_SYMBOL(ceph_osdc_writepages);
5271 static int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5272 u64 src_snapid, u64 src_version,
5273 struct ceph_object_id *src_oid,
5274 struct ceph_object_locator *src_oloc,
5275 u32 src_fadvise_flags,
5276 u32 dst_fadvise_flags,
5279 struct ceph_osd_req_op *op;
5280 struct page **pages;
5283 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5285 return PTR_ERR(pages);
5287 op = _osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM, dst_fadvise_flags);
5288 op->copy_from.snapid = src_snapid;
5289 op->copy_from.src_version = src_version;
5290 op->copy_from.flags = copy_from_flags;
5291 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5293 p = page_address(pages[0]);
5294 end = p + PAGE_SIZE;
5295 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5296 encode_oloc(&p, end, src_oloc);
5297 op->indata_len = PAGE_SIZE - (end - p);
5299 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5300 op->indata_len, 0, false, true);
5304 int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
5305 u64 src_snapid, u64 src_version,
5306 struct ceph_object_id *src_oid,
5307 struct ceph_object_locator *src_oloc,
5308 u32 src_fadvise_flags,
5309 struct ceph_object_id *dst_oid,
5310 struct ceph_object_locator *dst_oloc,
5311 u32 dst_fadvise_flags,
5314 struct ceph_osd_request *req;
5317 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL);
5321 req->r_flags = CEPH_OSD_FLAG_WRITE;
5323 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
5324 ceph_oid_copy(&req->r_t.base_oid, dst_oid);
5326 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid,
5327 src_oloc, src_fadvise_flags,
5328 dst_fadvise_flags, copy_from_flags);
5332 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL);
5336 ceph_osdc_start_request(osdc, req, false);
5337 ret = ceph_osdc_wait_request(osdc, req);
5340 ceph_osdc_put_request(req);
5343 EXPORT_SYMBOL(ceph_osdc_copy_from);
5345 int __init ceph_osdc_setup(void)
5347 size_t size = sizeof(struct ceph_osd_request) +
5348 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5350 BUG_ON(ceph_osd_request_cache);
5351 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5354 return ceph_osd_request_cache ? 0 : -ENOMEM;
5357 void ceph_osdc_cleanup(void)
5359 BUG_ON(!ceph_osd_request_cache);
5360 kmem_cache_destroy(ceph_osd_request_cache);
5361 ceph_osd_request_cache = NULL;
5365 * handle incoming message
5367 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5369 struct ceph_osd *osd = con->private;
5370 struct ceph_osd_client *osdc = osd->o_osdc;
5371 int type = le16_to_cpu(msg->hdr.type);
5374 case CEPH_MSG_OSD_MAP:
5375 ceph_osdc_handle_map(osdc, msg);
5377 case CEPH_MSG_OSD_OPREPLY:
5378 handle_reply(osd, msg);
5380 case CEPH_MSG_OSD_BACKOFF:
5381 handle_backoff(osd, msg);
5383 case CEPH_MSG_WATCH_NOTIFY:
5384 handle_watch_notify(osdc, msg);
5388 pr_err("received unknown message type %d %s\n", type,
5389 ceph_msg_type_name(type));
5396 * Lookup and return message for incoming reply. Don't try to do
5397 * anything about a larger than preallocated data portion of the
5398 * message at the moment - for now, just skip the message.
5400 static struct ceph_msg *get_reply(struct ceph_connection *con,
5401 struct ceph_msg_header *hdr,
5404 struct ceph_osd *osd = con->private;
5405 struct ceph_osd_client *osdc = osd->o_osdc;
5406 struct ceph_msg *m = NULL;
5407 struct ceph_osd_request *req;
5408 int front_len = le32_to_cpu(hdr->front_len);
5409 int data_len = le32_to_cpu(hdr->data_len);
5410 u64 tid = le64_to_cpu(hdr->tid);
5412 down_read(&osdc->lock);
5413 if (!osd_registered(osd)) {
5414 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5416 goto out_unlock_osdc;
5418 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5420 mutex_lock(&osd->lock);
5421 req = lookup_request(&osd->o_requests, tid);
5423 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5426 goto out_unlock_session;
5429 ceph_msg_revoke_incoming(req->r_reply);
5431 if (front_len > req->r_reply->front_alloc_len) {
5432 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5433 __func__, osd->o_osd, req->r_tid, front_len,
5434 req->r_reply->front_alloc_len);
5435 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5438 goto out_unlock_session;
5439 ceph_msg_put(req->r_reply);
5443 if (data_len > req->r_reply->data_length) {
5444 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5445 __func__, osd->o_osd, req->r_tid, data_len,
5446 req->r_reply->data_length);
5449 goto out_unlock_session;
5452 m = ceph_msg_get(req->r_reply);
5453 dout("get_reply tid %lld %p\n", tid, m);
5456 mutex_unlock(&osd->lock);
5458 up_read(&osdc->lock);
5463 * TODO: switch to a msg-owned pagelist
5465 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5468 int type = le16_to_cpu(hdr->type);
5469 u32 front_len = le32_to_cpu(hdr->front_len);
5470 u32 data_len = le32_to_cpu(hdr->data_len);
5472 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
5477 struct page **pages;
5478 struct ceph_osd_data osd_data;
5480 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5482 if (IS_ERR(pages)) {
5487 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
5489 ceph_osdc_msg_data_add(m, &osd_data);
5495 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5496 struct ceph_msg_header *hdr,
5499 struct ceph_osd *osd = con->private;
5500 int type = le16_to_cpu(hdr->type);
5504 case CEPH_MSG_OSD_MAP:
5505 case CEPH_MSG_OSD_BACKOFF:
5506 case CEPH_MSG_WATCH_NOTIFY:
5507 return alloc_msg_with_page_vector(hdr);
5508 case CEPH_MSG_OSD_OPREPLY:
5509 return get_reply(con, hdr, skip);
5511 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5519 * Wrappers to refcount containing ceph_osd struct
5521 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5523 struct ceph_osd *osd = con->private;
5529 static void put_osd_con(struct ceph_connection *con)
5531 struct ceph_osd *osd = con->private;
5539 * Note: returned pointer is the address of a structure that's
5540 * managed separately. Caller must *not* attempt to free it.
5542 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
5543 int *proto, int force_new)
5545 struct ceph_osd *o = con->private;
5546 struct ceph_osd_client *osdc = o->o_osdc;
5547 struct ceph_auth_client *ac = osdc->client->monc.auth;
5548 struct ceph_auth_handshake *auth = &o->o_auth;
5550 if (force_new && auth->authorizer) {
5551 ceph_auth_destroy_authorizer(auth->authorizer);
5552 auth->authorizer = NULL;
5554 if (!auth->authorizer) {
5555 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5558 return ERR_PTR(ret);
5560 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5563 return ERR_PTR(ret);
5565 *proto = ac->protocol;
5570 static int add_authorizer_challenge(struct ceph_connection *con,
5571 void *challenge_buf, int challenge_buf_len)
5573 struct ceph_osd *o = con->private;
5574 struct ceph_osd_client *osdc = o->o_osdc;
5575 struct ceph_auth_client *ac = osdc->client->monc.auth;
5577 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5578 challenge_buf, challenge_buf_len);
5581 static int verify_authorizer_reply(struct ceph_connection *con)
5583 struct ceph_osd *o = con->private;
5584 struct ceph_osd_client *osdc = o->o_osdc;
5585 struct ceph_auth_client *ac = osdc->client->monc.auth;
5587 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
5590 static int invalidate_authorizer(struct ceph_connection *con)
5592 struct ceph_osd *o = con->private;
5593 struct ceph_osd_client *osdc = o->o_osdc;
5594 struct ceph_auth_client *ac = osdc->client->monc.auth;
5596 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5597 return ceph_monc_validate_auth(&osdc->client->monc);
5600 static void osd_reencode_message(struct ceph_msg *msg)
5602 int type = le16_to_cpu(msg->hdr.type);
5604 if (type == CEPH_MSG_OSD_OP)
5605 encode_request_finish(msg);
5608 static int osd_sign_message(struct ceph_msg *msg)
5610 struct ceph_osd *o = msg->con->private;
5611 struct ceph_auth_handshake *auth = &o->o_auth;
5613 return ceph_auth_sign_message(auth, msg);
5616 static int osd_check_message_signature(struct ceph_msg *msg)
5618 struct ceph_osd *o = msg->con->private;
5619 struct ceph_auth_handshake *auth = &o->o_auth;
5621 return ceph_auth_check_message_signature(auth, msg);
5624 static const struct ceph_connection_operations osd_con_ops = {
5627 .dispatch = dispatch,
5628 .get_authorizer = get_authorizer,
5629 .add_authorizer_challenge = add_authorizer_challenge,
5630 .verify_authorizer_reply = verify_authorizer_reply,
5631 .invalidate_authorizer = invalidate_authorizer,
5632 .alloc_msg = alloc_msg,
5633 .reencode_message = osd_reencode_message,
5634 .sign_message = osd_sign_message,
5635 .check_message_signature = osd_check_message_signature,