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_FROM2:
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;
448 dest->recovery_deletes = src->recovery_deletes;
450 dest->flags = src->flags;
451 dest->used_replica = src->used_replica;
452 dest->paused = src->paused;
454 dest->epoch = src->epoch;
455 dest->last_force_resend = src->last_force_resend;
457 dest->osd = src->osd;
460 static void target_destroy(struct ceph_osd_request_target *t)
462 ceph_oid_destroy(&t->base_oid);
463 ceph_oloc_destroy(&t->base_oloc);
464 ceph_oid_destroy(&t->target_oid);
465 ceph_oloc_destroy(&t->target_oloc);
471 static void request_release_checks(struct ceph_osd_request *req)
473 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
474 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
475 WARN_ON(!list_empty(&req->r_private_item));
479 static void ceph_osdc_release_request(struct kref *kref)
481 struct ceph_osd_request *req = container_of(kref,
482 struct ceph_osd_request, r_kref);
485 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
486 req->r_request, req->r_reply);
487 request_release_checks(req);
490 ceph_msg_put(req->r_request);
492 ceph_msg_put(req->r_reply);
494 for (which = 0; which < req->r_num_ops; which++)
495 osd_req_op_data_release(req, which);
497 target_destroy(&req->r_t);
498 ceph_put_snap_context(req->r_snapc);
501 mempool_free(req, req->r_osdc->req_mempool);
502 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
503 kmem_cache_free(ceph_osd_request_cache, req);
508 void ceph_osdc_get_request(struct ceph_osd_request *req)
510 dout("%s %p (was %d)\n", __func__, req,
511 kref_read(&req->r_kref));
512 kref_get(&req->r_kref);
514 EXPORT_SYMBOL(ceph_osdc_get_request);
516 void ceph_osdc_put_request(struct ceph_osd_request *req)
519 dout("%s %p (was %d)\n", __func__, req,
520 kref_read(&req->r_kref));
521 kref_put(&req->r_kref, ceph_osdc_release_request);
524 EXPORT_SYMBOL(ceph_osdc_put_request);
526 static void request_init(struct ceph_osd_request *req)
528 /* req only, each op is zeroed in osd_req_op_init() */
529 memset(req, 0, sizeof(*req));
531 kref_init(&req->r_kref);
532 init_completion(&req->r_completion);
533 RB_CLEAR_NODE(&req->r_node);
534 RB_CLEAR_NODE(&req->r_mc_node);
535 INIT_LIST_HEAD(&req->r_private_item);
537 target_init(&req->r_t);
540 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
541 struct ceph_snap_context *snapc,
542 unsigned int num_ops,
546 struct ceph_osd_request *req;
549 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
550 req = mempool_alloc(osdc->req_mempool, gfp_flags);
551 } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
552 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
554 BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
555 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
562 req->r_mempool = use_mempool;
563 req->r_num_ops = num_ops;
564 req->r_snapid = CEPH_NOSNAP;
565 req->r_snapc = ceph_get_snap_context(snapc);
567 dout("%s req %p\n", __func__, req);
570 EXPORT_SYMBOL(ceph_osdc_alloc_request);
572 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
574 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
577 static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
578 int num_request_data_items,
579 int num_reply_data_items)
581 struct ceph_osd_client *osdc = req->r_osdc;
582 struct ceph_msg *msg;
585 WARN_ON(req->r_request || req->r_reply);
586 WARN_ON(ceph_oid_empty(&req->r_base_oid));
587 WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
589 /* create request message */
590 msg_size = CEPH_ENCODING_START_BLK_LEN +
591 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
592 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
593 msg_size += CEPH_ENCODING_START_BLK_LEN +
594 sizeof(struct ceph_osd_reqid); /* reqid */
595 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
596 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
597 msg_size += CEPH_ENCODING_START_BLK_LEN +
598 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
599 msg_size += 4 + req->r_base_oid.name_len; /* oid */
600 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
601 msg_size += 8; /* snapid */
602 msg_size += 8; /* snap_seq */
603 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
604 msg_size += 4 + 8; /* retry_attempt, features */
607 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
608 num_request_data_items);
610 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
611 num_request_data_items, gfp, true);
615 memset(msg->front.iov_base, 0, msg->front.iov_len);
616 req->r_request = msg;
618 /* create reply message */
619 msg_size = OSD_OPREPLY_FRONT_LEN;
620 msg_size += req->r_base_oid.name_len;
621 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
624 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
625 num_reply_data_items);
627 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
628 num_reply_data_items, gfp, true);
637 static bool osd_req_opcode_valid(u16 opcode)
640 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
641 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
648 static void get_num_data_items(struct ceph_osd_request *req,
649 int *num_request_data_items,
650 int *num_reply_data_items)
652 struct ceph_osd_req_op *op;
654 *num_request_data_items = 0;
655 *num_reply_data_items = 0;
657 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
660 case CEPH_OSD_OP_WRITE:
661 case CEPH_OSD_OP_WRITEFULL:
662 case CEPH_OSD_OP_SETXATTR:
663 case CEPH_OSD_OP_CMPXATTR:
664 case CEPH_OSD_OP_NOTIFY_ACK:
665 case CEPH_OSD_OP_COPY_FROM2:
666 *num_request_data_items += 1;
670 case CEPH_OSD_OP_STAT:
671 case CEPH_OSD_OP_READ:
672 case CEPH_OSD_OP_LIST_WATCHERS:
673 *num_reply_data_items += 1;
677 case CEPH_OSD_OP_NOTIFY:
678 *num_request_data_items += 1;
679 *num_reply_data_items += 1;
681 case CEPH_OSD_OP_CALL:
682 *num_request_data_items += 2;
683 *num_reply_data_items += 1;
687 WARN_ON(!osd_req_opcode_valid(op->op));
694 * oid, oloc and OSD op opcode(s) must be filled in before this function
697 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
699 int num_request_data_items, num_reply_data_items;
701 get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
702 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
703 num_reply_data_items);
705 EXPORT_SYMBOL(ceph_osdc_alloc_messages);
708 * This is an osd op init function for opcodes that have no data or
709 * other information associated with them. It also serves as a
710 * common init routine for all the other init functions, below.
712 struct ceph_osd_req_op *
713 osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
714 u16 opcode, u32 flags)
716 struct ceph_osd_req_op *op;
718 BUG_ON(which >= osd_req->r_num_ops);
719 BUG_ON(!osd_req_opcode_valid(opcode));
721 op = &osd_req->r_ops[which];
722 memset(op, 0, sizeof (*op));
728 EXPORT_SYMBOL(osd_req_op_init);
730 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
731 unsigned int which, u16 opcode,
732 u64 offset, u64 length,
733 u64 truncate_size, u32 truncate_seq)
735 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
737 size_t payload_len = 0;
739 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
740 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
741 opcode != CEPH_OSD_OP_TRUNCATE);
743 op->extent.offset = offset;
744 op->extent.length = length;
745 op->extent.truncate_size = truncate_size;
746 op->extent.truncate_seq = truncate_seq;
747 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
748 payload_len += length;
750 op->indata_len = payload_len;
752 EXPORT_SYMBOL(osd_req_op_extent_init);
754 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
755 unsigned int which, u64 length)
757 struct ceph_osd_req_op *op;
760 BUG_ON(which >= osd_req->r_num_ops);
761 op = &osd_req->r_ops[which];
762 previous = op->extent.length;
764 if (length == previous)
765 return; /* Nothing to do */
766 BUG_ON(length > previous);
768 op->extent.length = length;
769 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
770 op->indata_len -= previous - length;
772 EXPORT_SYMBOL(osd_req_op_extent_update);
774 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
775 unsigned int which, u64 offset_inc)
777 struct ceph_osd_req_op *op, *prev_op;
779 BUG_ON(which + 1 >= osd_req->r_num_ops);
781 prev_op = &osd_req->r_ops[which];
782 op = osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
783 /* dup previous one */
784 op->indata_len = prev_op->indata_len;
785 op->outdata_len = prev_op->outdata_len;
786 op->extent = prev_op->extent;
788 op->extent.offset += offset_inc;
789 op->extent.length -= offset_inc;
791 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
792 op->indata_len -= offset_inc;
794 EXPORT_SYMBOL(osd_req_op_extent_dup_last);
796 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
797 const char *class, const char *method)
799 struct ceph_osd_req_op *op;
800 struct ceph_pagelist *pagelist;
801 size_t payload_len = 0;
805 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
807 pagelist = ceph_pagelist_alloc(GFP_NOFS);
811 op->cls.class_name = class;
812 size = strlen(class);
813 BUG_ON(size > (size_t) U8_MAX);
814 op->cls.class_len = size;
815 ret = ceph_pagelist_append(pagelist, class, size);
817 goto err_pagelist_free;
820 op->cls.method_name = method;
821 size = strlen(method);
822 BUG_ON(size > (size_t) U8_MAX);
823 op->cls.method_len = size;
824 ret = ceph_pagelist_append(pagelist, method, size);
826 goto err_pagelist_free;
829 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
830 op->indata_len = payload_len;
834 ceph_pagelist_release(pagelist);
837 EXPORT_SYMBOL(osd_req_op_cls_init);
839 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
840 u16 opcode, const char *name, const void *value,
841 size_t size, u8 cmp_op, u8 cmp_mode)
843 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
845 struct ceph_pagelist *pagelist;
849 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
851 pagelist = ceph_pagelist_alloc(GFP_NOFS);
855 payload_len = strlen(name);
856 op->xattr.name_len = payload_len;
857 ret = ceph_pagelist_append(pagelist, name, payload_len);
859 goto err_pagelist_free;
861 op->xattr.value_len = size;
862 ret = ceph_pagelist_append(pagelist, value, size);
864 goto err_pagelist_free;
867 op->xattr.cmp_op = cmp_op;
868 op->xattr.cmp_mode = cmp_mode;
870 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
871 op->indata_len = payload_len;
875 ceph_pagelist_release(pagelist);
878 EXPORT_SYMBOL(osd_req_op_xattr_init);
881 * @watch_opcode: CEPH_OSD_WATCH_OP_*
883 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
884 u8 watch_opcode, u64 cookie, u32 gen)
886 struct ceph_osd_req_op *op;
888 op = osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
889 op->watch.cookie = cookie;
890 op->watch.op = watch_opcode;
895 * prot_ver, timeout and notify payload (may be empty) should already be
896 * encoded in @request_pl
898 static void osd_req_op_notify_init(struct ceph_osd_request *req, int which,
899 u64 cookie, struct ceph_pagelist *request_pl)
901 struct ceph_osd_req_op *op;
903 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
904 op->notify.cookie = cookie;
906 ceph_osd_data_pagelist_init(&op->notify.request_data, request_pl);
907 op->indata_len = request_pl->length;
911 * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_*
913 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
915 u64 expected_object_size,
916 u64 expected_write_size,
919 struct ceph_osd_req_op *op;
921 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_SETALLOCHINT, 0);
922 op->alloc_hint.expected_object_size = expected_object_size;
923 op->alloc_hint.expected_write_size = expected_write_size;
924 op->alloc_hint.flags = flags;
927 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
928 * not worth a feature bit. Set FAILOK per-op flag to make
929 * sure older osds don't trip over an unsupported opcode.
931 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
933 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
935 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
936 struct ceph_osd_data *osd_data)
938 u64 length = ceph_osd_data_length(osd_data);
940 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
941 BUG_ON(length > (u64) SIZE_MAX);
943 ceph_msg_data_add_pages(msg, osd_data->pages,
944 length, osd_data->alignment, false);
945 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
947 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
949 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
950 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
952 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
953 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
955 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
959 static u32 osd_req_encode_op(struct ceph_osd_op *dst,
960 const struct ceph_osd_req_op *src)
963 case CEPH_OSD_OP_STAT:
965 case CEPH_OSD_OP_READ:
966 case CEPH_OSD_OP_WRITE:
967 case CEPH_OSD_OP_WRITEFULL:
968 case CEPH_OSD_OP_ZERO:
969 case CEPH_OSD_OP_TRUNCATE:
970 dst->extent.offset = cpu_to_le64(src->extent.offset);
971 dst->extent.length = cpu_to_le64(src->extent.length);
972 dst->extent.truncate_size =
973 cpu_to_le64(src->extent.truncate_size);
974 dst->extent.truncate_seq =
975 cpu_to_le32(src->extent.truncate_seq);
977 case CEPH_OSD_OP_CALL:
978 dst->cls.class_len = src->cls.class_len;
979 dst->cls.method_len = src->cls.method_len;
980 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
982 case CEPH_OSD_OP_WATCH:
983 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
984 dst->watch.ver = cpu_to_le64(0);
985 dst->watch.op = src->watch.op;
986 dst->watch.gen = cpu_to_le32(src->watch.gen);
988 case CEPH_OSD_OP_NOTIFY_ACK:
990 case CEPH_OSD_OP_NOTIFY:
991 dst->notify.cookie = cpu_to_le64(src->notify.cookie);
993 case CEPH_OSD_OP_LIST_WATCHERS:
995 case CEPH_OSD_OP_SETALLOCHINT:
996 dst->alloc_hint.expected_object_size =
997 cpu_to_le64(src->alloc_hint.expected_object_size);
998 dst->alloc_hint.expected_write_size =
999 cpu_to_le64(src->alloc_hint.expected_write_size);
1000 dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags);
1002 case CEPH_OSD_OP_SETXATTR:
1003 case CEPH_OSD_OP_CMPXATTR:
1004 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1005 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1006 dst->xattr.cmp_op = src->xattr.cmp_op;
1007 dst->xattr.cmp_mode = src->xattr.cmp_mode;
1009 case CEPH_OSD_OP_CREATE:
1010 case CEPH_OSD_OP_DELETE:
1012 case CEPH_OSD_OP_COPY_FROM2:
1013 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1014 dst->copy_from.src_version =
1015 cpu_to_le64(src->copy_from.src_version);
1016 dst->copy_from.flags = src->copy_from.flags;
1017 dst->copy_from.src_fadvise_flags =
1018 cpu_to_le32(src->copy_from.src_fadvise_flags);
1021 pr_err("unsupported osd opcode %s\n",
1022 ceph_osd_op_name(src->op));
1028 dst->op = cpu_to_le16(src->op);
1029 dst->flags = cpu_to_le32(src->flags);
1030 dst->payload_len = cpu_to_le32(src->indata_len);
1032 return src->indata_len;
1036 * build new request AND message, calculate layout, and adjust file
1039 * if the file was recently truncated, we include information about its
1040 * old and new size so that the object can be updated appropriately. (we
1041 * avoid synchronously deleting truncated objects because it's slow.)
1043 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1044 struct ceph_file_layout *layout,
1045 struct ceph_vino vino,
1047 unsigned int which, int num_ops,
1048 int opcode, int flags,
1049 struct ceph_snap_context *snapc,
1054 struct ceph_osd_request *req;
1060 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
1061 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1062 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
1064 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
1071 /* calculate max write size */
1072 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
1076 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
1077 osd_req_op_init(req, which, opcode, 0);
1079 u32 object_size = layout->object_size;
1080 u32 object_base = off - objoff;
1081 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1082 if (truncate_size <= object_base) {
1085 truncate_size -= object_base;
1086 if (truncate_size > object_size)
1087 truncate_size = object_size;
1090 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1091 truncate_size, truncate_seq);
1094 req->r_base_oloc.pool = layout->pool_id;
1095 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1096 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1097 req->r_flags = flags | osdc->client->options->read_from_replica;
1099 req->r_snapid = vino.snap;
1100 if (flags & CEPH_OSD_FLAG_WRITE)
1101 req->r_data_offset = off;
1105 * This is a special case for ceph_writepages_start(), but it
1106 * also covers ceph_uninline_data(). If more multi-op request
1107 * use cases emerge, we will need a separate helper.
1109 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
1111 r = ceph_osdc_alloc_messages(req, GFP_NOFS);
1118 ceph_osdc_put_request(req);
1121 EXPORT_SYMBOL(ceph_osdc_new_request);
1124 * We keep osd requests in an rbtree, sorted by ->r_tid.
1126 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
1127 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
1130 * Call @fn on each OSD request as long as @fn returns 0.
1132 static void for_each_request(struct ceph_osd_client *osdc,
1133 int (*fn)(struct ceph_osd_request *req, void *arg),
1136 struct rb_node *n, *p;
1138 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1139 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1141 for (p = rb_first(&osd->o_requests); p; ) {
1142 struct ceph_osd_request *req =
1143 rb_entry(p, struct ceph_osd_request, r_node);
1151 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1152 struct ceph_osd_request *req =
1153 rb_entry(p, struct ceph_osd_request, r_node);
1161 static bool osd_homeless(struct ceph_osd *osd)
1163 return osd->o_osd == CEPH_HOMELESS_OSD;
1166 static bool osd_registered(struct ceph_osd *osd)
1168 verify_osdc_locked(osd->o_osdc);
1170 return !RB_EMPTY_NODE(&osd->o_node);
1174 * Assumes @osd is zero-initialized.
1176 static void osd_init(struct ceph_osd *osd)
1178 refcount_set(&osd->o_ref, 1);
1179 RB_CLEAR_NODE(&osd->o_node);
1180 osd->o_requests = RB_ROOT;
1181 osd->o_linger_requests = RB_ROOT;
1182 osd->o_backoff_mappings = RB_ROOT;
1183 osd->o_backoffs_by_id = RB_ROOT;
1184 INIT_LIST_HEAD(&osd->o_osd_lru);
1185 INIT_LIST_HEAD(&osd->o_keepalive_item);
1186 osd->o_incarnation = 1;
1187 mutex_init(&osd->lock);
1190 static void osd_cleanup(struct ceph_osd *osd)
1192 WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1193 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1194 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1195 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1196 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1197 WARN_ON(!list_empty(&osd->o_osd_lru));
1198 WARN_ON(!list_empty(&osd->o_keepalive_item));
1200 if (osd->o_auth.authorizer) {
1201 WARN_ON(osd_homeless(osd));
1202 ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1207 * Track open sessions with osds.
1209 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1211 struct ceph_osd *osd;
1213 WARN_ON(onum == CEPH_HOMELESS_OSD);
1215 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1220 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1225 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1227 if (refcount_inc_not_zero(&osd->o_ref)) {
1228 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1229 refcount_read(&osd->o_ref));
1232 dout("get_osd %p FAIL\n", osd);
1237 static void put_osd(struct ceph_osd *osd)
1239 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1240 refcount_read(&osd->o_ref) - 1);
1241 if (refcount_dec_and_test(&osd->o_ref)) {
1247 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1249 static void __move_osd_to_lru(struct ceph_osd *osd)
1251 struct ceph_osd_client *osdc = osd->o_osdc;
1253 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1254 BUG_ON(!list_empty(&osd->o_osd_lru));
1256 spin_lock(&osdc->osd_lru_lock);
1257 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1258 spin_unlock(&osdc->osd_lru_lock);
1260 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1263 static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1265 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1266 RB_EMPTY_ROOT(&osd->o_linger_requests))
1267 __move_osd_to_lru(osd);
1270 static void __remove_osd_from_lru(struct ceph_osd *osd)
1272 struct ceph_osd_client *osdc = osd->o_osdc;
1274 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1276 spin_lock(&osdc->osd_lru_lock);
1277 if (!list_empty(&osd->o_osd_lru))
1278 list_del_init(&osd->o_osd_lru);
1279 spin_unlock(&osdc->osd_lru_lock);
1283 * Close the connection and assign any leftover requests to the
1286 static void close_osd(struct ceph_osd *osd)
1288 struct ceph_osd_client *osdc = osd->o_osdc;
1291 verify_osdc_wrlocked(osdc);
1292 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1294 ceph_con_close(&osd->o_con);
1296 for (n = rb_first(&osd->o_requests); n; ) {
1297 struct ceph_osd_request *req =
1298 rb_entry(n, struct ceph_osd_request, r_node);
1300 n = rb_next(n); /* unlink_request() */
1302 dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1303 unlink_request(osd, req);
1304 link_request(&osdc->homeless_osd, req);
1306 for (n = rb_first(&osd->o_linger_requests); n; ) {
1307 struct ceph_osd_linger_request *lreq =
1308 rb_entry(n, struct ceph_osd_linger_request, node);
1310 n = rb_next(n); /* unlink_linger() */
1312 dout(" reassigning lreq %p linger_id %llu\n", lreq,
1314 unlink_linger(osd, lreq);
1315 link_linger(&osdc->homeless_osd, lreq);
1317 clear_backoffs(osd);
1319 __remove_osd_from_lru(osd);
1320 erase_osd(&osdc->osds, osd);
1327 static int reopen_osd(struct ceph_osd *osd)
1329 struct ceph_entity_addr *peer_addr;
1331 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1333 if (RB_EMPTY_ROOT(&osd->o_requests) &&
1334 RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1339 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1340 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1341 !ceph_con_opened(&osd->o_con)) {
1344 dout("osd addr hasn't changed and connection never opened, "
1345 "letting msgr retry\n");
1346 /* touch each r_stamp for handle_timeout()'s benfit */
1347 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1348 struct ceph_osd_request *req =
1349 rb_entry(n, struct ceph_osd_request, r_node);
1350 req->r_stamp = jiffies;
1356 ceph_con_close(&osd->o_con);
1357 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1358 osd->o_incarnation++;
1363 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1366 struct ceph_osd *osd;
1369 verify_osdc_wrlocked(osdc);
1371 verify_osdc_locked(osdc);
1373 if (o != CEPH_HOMELESS_OSD)
1374 osd = lookup_osd(&osdc->osds, o);
1376 osd = &osdc->homeless_osd;
1379 return ERR_PTR(-EAGAIN);
1381 osd = create_osd(osdc, o);
1382 insert_osd(&osdc->osds, osd);
1383 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1384 &osdc->osdmap->osd_addr[osd->o_osd]);
1387 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1392 * Create request <-> OSD session relation.
1394 * @req has to be assigned a tid, @osd may be homeless.
1396 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1398 verify_osd_locked(osd);
1399 WARN_ON(!req->r_tid || req->r_osd);
1400 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1403 if (!osd_homeless(osd))
1404 __remove_osd_from_lru(osd);
1406 atomic_inc(&osd->o_osdc->num_homeless);
1409 insert_request(&osd->o_requests, req);
1413 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1415 verify_osd_locked(osd);
1416 WARN_ON(req->r_osd != osd);
1417 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1421 erase_request(&osd->o_requests, req);
1424 if (!osd_homeless(osd))
1425 maybe_move_osd_to_lru(osd);
1427 atomic_dec(&osd->o_osdc->num_homeless);
1430 static bool __pool_full(struct ceph_pg_pool_info *pi)
1432 return pi->flags & CEPH_POOL_FLAG_FULL;
1435 static bool have_pool_full(struct ceph_osd_client *osdc)
1439 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1440 struct ceph_pg_pool_info *pi =
1441 rb_entry(n, struct ceph_pg_pool_info, node);
1443 if (__pool_full(pi))
1450 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1452 struct ceph_pg_pool_info *pi;
1454 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1458 return __pool_full(pi);
1462 * Returns whether a request should be blocked from being sent
1463 * based on the current osdmap and osd_client settings.
1465 static bool target_should_be_paused(struct ceph_osd_client *osdc,
1466 const struct ceph_osd_request_target *t,
1467 struct ceph_pg_pool_info *pi)
1469 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1470 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1471 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1474 WARN_ON(pi->id != t->target_oloc.pool);
1475 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1476 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1477 (osdc->osdmap->epoch < osdc->epoch_barrier);
1480 static int pick_random_replica(const struct ceph_osds *acting)
1482 int i = prandom_u32() % acting->size;
1484 dout("%s picked osd%d, primary osd%d\n", __func__,
1485 acting->osds[i], acting->primary);
1490 * Picks the closest replica based on client's location given by
1491 * crush_location option. Prefers the primary if the locality is
1494 static int pick_closest_replica(struct ceph_osd_client *osdc,
1495 const struct ceph_osds *acting)
1497 struct ceph_options *opt = osdc->client->options;
1498 int best_i, best_locality;
1499 int i = 0, locality;
1502 locality = ceph_get_crush_locality(osdc->osdmap,
1506 (locality >= 0 && best_locality < 0) ||
1507 (locality >= 0 && best_locality >= 0 &&
1508 locality < best_locality)) {
1510 best_locality = locality;
1512 } while (++i < acting->size);
1514 dout("%s picked osd%d with locality %d, primary osd%d\n", __func__,
1515 acting->osds[best_i], best_locality, acting->primary);
1519 enum calc_target_result {
1520 CALC_TARGET_NO_ACTION = 0,
1521 CALC_TARGET_NEED_RESEND,
1522 CALC_TARGET_POOL_DNE,
1525 static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1526 struct ceph_osd_request_target *t,
1529 struct ceph_pg_pool_info *pi;
1530 struct ceph_pg pgid, last_pgid;
1531 struct ceph_osds up, acting;
1532 bool is_read = t->flags & CEPH_OSD_FLAG_READ;
1533 bool is_write = t->flags & CEPH_OSD_FLAG_WRITE;
1534 bool force_resend = false;
1535 bool unpaused = false;
1536 bool legacy_change = false;
1538 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1539 bool recovery_deletes = ceph_osdmap_flag(osdc,
1540 CEPH_OSDMAP_RECOVERY_DELETES);
1541 enum calc_target_result ct_res;
1543 t->epoch = osdc->osdmap->epoch;
1544 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1546 t->osd = CEPH_HOMELESS_OSD;
1547 ct_res = CALC_TARGET_POOL_DNE;
1551 if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1552 if (t->last_force_resend < pi->last_force_request_resend) {
1553 t->last_force_resend = pi->last_force_request_resend;
1554 force_resend = true;
1555 } else if (t->last_force_resend == 0) {
1556 force_resend = true;
1561 ceph_oid_copy(&t->target_oid, &t->base_oid);
1562 ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1563 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1564 if (is_read && pi->read_tier >= 0)
1565 t->target_oloc.pool = pi->read_tier;
1566 if (is_write && pi->write_tier >= 0)
1567 t->target_oloc.pool = pi->write_tier;
1569 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1571 t->osd = CEPH_HOMELESS_OSD;
1572 ct_res = CALC_TARGET_POOL_DNE;
1577 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
1578 last_pgid.pool = pgid.pool;
1579 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1581 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1583 ceph_is_new_interval(&t->acting,
1595 t->recovery_deletes,
1598 force_resend = true;
1600 if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1604 legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1605 ceph_osds_changed(&t->acting, &acting,
1606 t->used_replica || any_change);
1608 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1610 if (legacy_change || force_resend || split) {
1611 t->pgid = pgid; /* struct */
1612 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1613 ceph_osds_copy(&t->acting, &acting);
1614 ceph_osds_copy(&t->up, &up);
1616 t->min_size = pi->min_size;
1617 t->pg_num = pi->pg_num;
1618 t->pg_num_mask = pi->pg_num_mask;
1619 t->sort_bitwise = sort_bitwise;
1620 t->recovery_deletes = recovery_deletes;
1622 if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS |
1623 CEPH_OSD_FLAG_LOCALIZE_READS)) &&
1624 !is_write && pi->type == CEPH_POOL_TYPE_REP &&
1628 WARN_ON(!is_read || acting.osds[0] != acting.primary);
1629 if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) {
1630 pos = pick_random_replica(&acting);
1632 pos = pick_closest_replica(osdc, &acting);
1634 t->osd = acting.osds[pos];
1635 t->used_replica = pos > 0;
1637 t->osd = acting.primary;
1638 t->used_replica = false;
1642 if (unpaused || legacy_change || force_resend || split)
1643 ct_res = CALC_TARGET_NEED_RESEND;
1645 ct_res = CALC_TARGET_NO_ACTION;
1648 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1649 legacy_change, force_resend, split, ct_res, t->osd);
1653 static struct ceph_spg_mapping *alloc_spg_mapping(void)
1655 struct ceph_spg_mapping *spg;
1657 spg = kmalloc(sizeof(*spg), GFP_NOIO);
1661 RB_CLEAR_NODE(&spg->node);
1662 spg->backoffs = RB_ROOT;
1666 static void free_spg_mapping(struct ceph_spg_mapping *spg)
1668 WARN_ON(!RB_EMPTY_NODE(&spg->node));
1669 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1675 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1676 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is
1677 * defined only within a specific spgid; it does not pass anything to
1678 * children on split, or to another primary.
1680 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1681 RB_BYPTR, const struct ceph_spg *, node)
1683 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1685 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1688 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1689 void **pkey, size_t *pkey_len)
1691 if (hoid->key_len) {
1693 *pkey_len = hoid->key_len;
1696 *pkey_len = hoid->oid_len;
1700 static int compare_names(const void *name1, size_t name1_len,
1701 const void *name2, size_t name2_len)
1705 ret = memcmp(name1, name2, min(name1_len, name2_len));
1707 if (name1_len < name2_len)
1709 else if (name1_len > name2_len)
1715 static int hoid_compare(const struct ceph_hobject_id *lhs,
1716 const struct ceph_hobject_id *rhs)
1718 void *effective_key1, *effective_key2;
1719 size_t effective_key1_len, effective_key2_len;
1722 if (lhs->is_max < rhs->is_max)
1724 if (lhs->is_max > rhs->is_max)
1727 if (lhs->pool < rhs->pool)
1729 if (lhs->pool > rhs->pool)
1732 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1734 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1737 ret = compare_names(lhs->nspace, lhs->nspace_len,
1738 rhs->nspace, rhs->nspace_len);
1742 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1743 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1744 ret = compare_names(effective_key1, effective_key1_len,
1745 effective_key2, effective_key2_len);
1749 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1753 if (lhs->snapid < rhs->snapid)
1755 if (lhs->snapid > rhs->snapid)
1762 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1763 * compat stuff here.
1765 * Assumes @hoid is zero-initialized.
1767 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1773 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1779 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1783 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1785 if (IS_ERR(hoid->key)) {
1786 ret = PTR_ERR(hoid->key);
1791 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1793 if (IS_ERR(hoid->oid)) {
1794 ret = PTR_ERR(hoid->oid);
1799 ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1800 ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1801 ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1803 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1805 if (IS_ERR(hoid->nspace)) {
1806 ret = PTR_ERR(hoid->nspace);
1807 hoid->nspace = NULL;
1811 ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1813 ceph_hoid_build_hash_cache(hoid);
1820 static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1822 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1823 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1826 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1828 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1829 ceph_encode_string(p, end, hoid->key, hoid->key_len);
1830 ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1831 ceph_encode_64(p, hoid->snapid);
1832 ceph_encode_32(p, hoid->hash);
1833 ceph_encode_8(p, hoid->is_max);
1834 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1835 ceph_encode_64(p, hoid->pool);
1838 static void free_hoid(struct ceph_hobject_id *hoid)
1843 kfree(hoid->nspace);
1848 static struct ceph_osd_backoff *alloc_backoff(void)
1850 struct ceph_osd_backoff *backoff;
1852 backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1856 RB_CLEAR_NODE(&backoff->spg_node);
1857 RB_CLEAR_NODE(&backoff->id_node);
1861 static void free_backoff(struct ceph_osd_backoff *backoff)
1863 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1864 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1866 free_hoid(backoff->begin);
1867 free_hoid(backoff->end);
1872 * Within a specific spgid, backoffs are managed by ->begin hoid.
1874 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1875 RB_BYVAL, spg_node);
1877 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1878 const struct ceph_hobject_id *hoid)
1880 struct rb_node *n = root->rb_node;
1883 struct ceph_osd_backoff *cur =
1884 rb_entry(n, struct ceph_osd_backoff, spg_node);
1887 cmp = hoid_compare(hoid, cur->begin);
1890 } else if (cmp > 0) {
1891 if (hoid_compare(hoid, cur->end) < 0)
1904 * Each backoff has a unique id within its OSD session.
1906 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1908 static void clear_backoffs(struct ceph_osd *osd)
1910 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1911 struct ceph_spg_mapping *spg =
1912 rb_entry(rb_first(&osd->o_backoff_mappings),
1913 struct ceph_spg_mapping, node);
1915 while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1916 struct ceph_osd_backoff *backoff =
1917 rb_entry(rb_first(&spg->backoffs),
1918 struct ceph_osd_backoff, spg_node);
1920 erase_backoff(&spg->backoffs, backoff);
1921 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1922 free_backoff(backoff);
1924 erase_spg_mapping(&osd->o_backoff_mappings, spg);
1925 free_spg_mapping(spg);
1930 * Set up a temporary, non-owning view into @t.
1932 static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1933 const struct ceph_osd_request_target *t)
1937 hoid->oid = t->target_oid.name;
1938 hoid->oid_len = t->target_oid.name_len;
1939 hoid->snapid = CEPH_NOSNAP;
1940 hoid->hash = t->pgid.seed;
1941 hoid->is_max = false;
1942 if (t->target_oloc.pool_ns) {
1943 hoid->nspace = t->target_oloc.pool_ns->str;
1944 hoid->nspace_len = t->target_oloc.pool_ns->len;
1946 hoid->nspace = NULL;
1947 hoid->nspace_len = 0;
1949 hoid->pool = t->target_oloc.pool;
1950 ceph_hoid_build_hash_cache(hoid);
1953 static bool should_plug_request(struct ceph_osd_request *req)
1955 struct ceph_osd *osd = req->r_osd;
1956 struct ceph_spg_mapping *spg;
1957 struct ceph_osd_backoff *backoff;
1958 struct ceph_hobject_id hoid;
1960 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1964 hoid_fill_from_target(&hoid, &req->r_t);
1965 backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1969 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1970 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1971 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1976 * Keep get_num_data_items() in sync with this function.
1978 static void setup_request_data(struct ceph_osd_request *req)
1980 struct ceph_msg *request_msg = req->r_request;
1981 struct ceph_msg *reply_msg = req->r_reply;
1982 struct ceph_osd_req_op *op;
1984 if (req->r_request->num_data_items || req->r_reply->num_data_items)
1987 WARN_ON(request_msg->data_length || reply_msg->data_length);
1988 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
1991 case CEPH_OSD_OP_WRITE:
1992 case CEPH_OSD_OP_WRITEFULL:
1993 WARN_ON(op->indata_len != op->extent.length);
1994 ceph_osdc_msg_data_add(request_msg,
1995 &op->extent.osd_data);
1997 case CEPH_OSD_OP_SETXATTR:
1998 case CEPH_OSD_OP_CMPXATTR:
1999 WARN_ON(op->indata_len != op->xattr.name_len +
2000 op->xattr.value_len);
2001 ceph_osdc_msg_data_add(request_msg,
2002 &op->xattr.osd_data);
2004 case CEPH_OSD_OP_NOTIFY_ACK:
2005 ceph_osdc_msg_data_add(request_msg,
2006 &op->notify_ack.request_data);
2008 case CEPH_OSD_OP_COPY_FROM2:
2009 ceph_osdc_msg_data_add(request_msg,
2010 &op->copy_from.osd_data);
2014 case CEPH_OSD_OP_STAT:
2015 ceph_osdc_msg_data_add(reply_msg,
2018 case CEPH_OSD_OP_READ:
2019 ceph_osdc_msg_data_add(reply_msg,
2020 &op->extent.osd_data);
2022 case CEPH_OSD_OP_LIST_WATCHERS:
2023 ceph_osdc_msg_data_add(reply_msg,
2024 &op->list_watchers.response_data);
2028 case CEPH_OSD_OP_CALL:
2029 WARN_ON(op->indata_len != op->cls.class_len +
2030 op->cls.method_len +
2031 op->cls.indata_len);
2032 ceph_osdc_msg_data_add(request_msg,
2033 &op->cls.request_info);
2034 /* optional, can be NONE */
2035 ceph_osdc_msg_data_add(request_msg,
2036 &op->cls.request_data);
2037 /* optional, can be NONE */
2038 ceph_osdc_msg_data_add(reply_msg,
2039 &op->cls.response_data);
2041 case CEPH_OSD_OP_NOTIFY:
2042 ceph_osdc_msg_data_add(request_msg,
2043 &op->notify.request_data);
2044 ceph_osdc_msg_data_add(reply_msg,
2045 &op->notify.response_data);
2051 static void encode_pgid(void **p, const struct ceph_pg *pgid)
2053 ceph_encode_8(p, 1);
2054 ceph_encode_64(p, pgid->pool);
2055 ceph_encode_32(p, pgid->seed);
2056 ceph_encode_32(p, -1); /* preferred */
2059 static void encode_spgid(void **p, const struct ceph_spg *spgid)
2061 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2062 encode_pgid(p, &spgid->pgid);
2063 ceph_encode_8(p, spgid->shard);
2066 static void encode_oloc(void **p, void *end,
2067 const struct ceph_object_locator *oloc)
2069 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2070 ceph_encode_64(p, oloc->pool);
2071 ceph_encode_32(p, -1); /* preferred */
2072 ceph_encode_32(p, 0); /* key len */
2074 ceph_encode_string(p, end, oloc->pool_ns->str,
2075 oloc->pool_ns->len);
2077 ceph_encode_32(p, 0);
2080 static void encode_request_partial(struct ceph_osd_request *req,
2081 struct ceph_msg *msg)
2083 void *p = msg->front.iov_base;
2084 void *const end = p + msg->front_alloc_len;
2088 if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2089 /* snapshots aren't writeable */
2090 WARN_ON(req->r_snapid != CEPH_NOSNAP);
2092 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2093 req->r_data_offset || req->r_snapc);
2096 setup_request_data(req);
2098 encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2099 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
2100 ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2101 ceph_encode_32(&p, req->r_flags);
2104 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2105 memset(p, 0, sizeof(struct ceph_osd_reqid));
2106 p += sizeof(struct ceph_osd_reqid);
2109 memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2110 p += sizeof(struct ceph_blkin_trace_info);
2112 ceph_encode_32(&p, 0); /* client_inc, always 0 */
2113 ceph_encode_timespec64(p, &req->r_mtime);
2114 p += sizeof(struct ceph_timespec);
2116 encode_oloc(&p, end, &req->r_t.target_oloc);
2117 ceph_encode_string(&p, end, req->r_t.target_oid.name,
2118 req->r_t.target_oid.name_len);
2120 /* ops, can imply data */
2121 ceph_encode_16(&p, req->r_num_ops);
2122 for (i = 0; i < req->r_num_ops; i++) {
2123 data_len += osd_req_encode_op(p, &req->r_ops[i]);
2124 p += sizeof(struct ceph_osd_op);
2127 ceph_encode_64(&p, req->r_snapid); /* snapid */
2129 ceph_encode_64(&p, req->r_snapc->seq);
2130 ceph_encode_32(&p, req->r_snapc->num_snaps);
2131 for (i = 0; i < req->r_snapc->num_snaps; i++)
2132 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2134 ceph_encode_64(&p, 0); /* snap_seq */
2135 ceph_encode_32(&p, 0); /* snaps len */
2138 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
2139 BUG_ON(p > end - 8); /* space for features */
2141 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2142 /* front_len is finalized in encode_request_finish() */
2143 msg->front.iov_len = p - msg->front.iov_base;
2144 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2145 msg->hdr.data_len = cpu_to_le32(data_len);
2147 * The header "data_off" is a hint to the receiver allowing it
2148 * to align received data into its buffers such that there's no
2149 * need to re-copy it before writing it to disk (direct I/O).
2151 msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
2153 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2154 req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2157 static void encode_request_finish(struct ceph_msg *msg)
2159 void *p = msg->front.iov_base;
2160 void *const partial_end = p + msg->front.iov_len;
2161 void *const end = p + msg->front_alloc_len;
2163 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2164 /* luminous OSD -- encode features and be done */
2166 ceph_encode_64(&p, msg->con->peer_features);
2169 char spgid[CEPH_ENCODING_START_BLK_LEN +
2170 CEPH_PGID_ENCODING_LEN + 1];
2174 char reqid[CEPH_ENCODING_START_BLK_LEN +
2175 sizeof(struct ceph_osd_reqid)];
2176 char trace[sizeof(struct ceph_blkin_trace_info)];
2178 struct ceph_timespec mtime;
2180 struct ceph_pg pgid;
2181 void *oloc, *oid, *tail;
2182 int oloc_len, oid_len, tail_len;
2186 * Pre-luminous OSD -- reencode v8 into v4 using @head
2187 * as a temporary buffer. Encode the raw PG; the rest
2188 * is just a matter of moving oloc, oid and tail blobs
2191 memcpy(&head, p, sizeof(head));
2195 p += CEPH_ENCODING_START_BLK_LEN;
2196 pgid.pool = ceph_decode_64(&p);
2197 p += 4 + 4; /* preferred, key len */
2198 len = ceph_decode_32(&p);
2199 p += len; /* nspace */
2200 oloc_len = p - oloc;
2203 len = ceph_decode_32(&p);
2208 tail_len = partial_end - p;
2210 p = msg->front.iov_base;
2211 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2212 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2213 ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2214 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2216 /* reassert_version */
2217 memset(p, 0, sizeof(struct ceph_eversion));
2218 p += sizeof(struct ceph_eversion);
2221 memmove(p, oloc, oloc_len);
2224 pgid.seed = le32_to_cpu(head.hash);
2225 encode_pgid(&p, &pgid); /* raw pg */
2228 memmove(p, oid, oid_len);
2231 /* tail -- ops, snapid, snapc, retry_attempt */
2233 memmove(p, tail, tail_len);
2236 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2240 msg->front.iov_len = p - msg->front.iov_base;
2241 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2243 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2244 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2245 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2246 le16_to_cpu(msg->hdr.version));
2250 * @req has to be assigned a tid and registered.
2252 static void send_request(struct ceph_osd_request *req)
2254 struct ceph_osd *osd = req->r_osd;
2256 verify_osd_locked(osd);
2257 WARN_ON(osd->o_osd != req->r_t.osd);
2260 if (should_plug_request(req))
2264 * We may have a previously queued request message hanging
2265 * around. Cancel it to avoid corrupting the msgr.
2268 ceph_msg_revoke(req->r_request);
2270 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2271 if (req->r_attempts)
2272 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2274 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2276 encode_request_partial(req, req->r_request);
2278 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2279 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2280 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2281 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2284 req->r_t.paused = false;
2285 req->r_stamp = jiffies;
2288 req->r_sent = osd->o_incarnation;
2289 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2290 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
2293 static void maybe_request_map(struct ceph_osd_client *osdc)
2295 bool continuous = false;
2297 verify_osdc_locked(osdc);
2298 WARN_ON(!osdc->osdmap->epoch);
2300 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2301 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2302 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2303 dout("%s osdc %p continuous\n", __func__, osdc);
2306 dout("%s osdc %p onetime\n", __func__, osdc);
2309 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2310 osdc->osdmap->epoch + 1, continuous))
2311 ceph_monc_renew_subs(&osdc->client->monc);
2314 static void complete_request(struct ceph_osd_request *req, int err);
2315 static void send_map_check(struct ceph_osd_request *req);
2317 static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2319 struct ceph_osd_client *osdc = req->r_osdc;
2320 struct ceph_osd *osd;
2321 enum calc_target_result ct_res;
2323 bool need_send = false;
2324 bool promoted = false;
2326 WARN_ON(req->r_tid);
2327 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2330 ct_res = calc_target(osdc, &req->r_t, false);
2331 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2334 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2336 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2340 if (osdc->abort_err) {
2341 dout("req %p abort_err %d\n", req, osdc->abort_err);
2342 err = osdc->abort_err;
2343 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2344 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2345 osdc->epoch_barrier);
2346 req->r_t.paused = true;
2347 maybe_request_map(osdc);
2348 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2349 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2350 dout("req %p pausewr\n", req);
2351 req->r_t.paused = true;
2352 maybe_request_map(osdc);
2353 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2354 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2355 dout("req %p pauserd\n", req);
2356 req->r_t.paused = true;
2357 maybe_request_map(osdc);
2358 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2359 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2360 CEPH_OSD_FLAG_FULL_FORCE)) &&
2361 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2362 pool_full(osdc, req->r_t.base_oloc.pool))) {
2363 dout("req %p full/pool_full\n", req);
2364 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
2367 pr_warn_ratelimited("FULL or reached pool quota\n");
2368 req->r_t.paused = true;
2369 maybe_request_map(osdc);
2371 } else if (!osd_homeless(osd)) {
2374 maybe_request_map(osdc);
2377 mutex_lock(&osd->lock);
2379 * Assign the tid atomically with send_request() to protect
2380 * multiple writes to the same object from racing with each
2381 * other, resulting in out of order ops on the OSDs.
2383 req->r_tid = atomic64_inc_return(&osdc->last_tid);
2384 link_request(osd, req);
2388 complete_request(req, err);
2389 mutex_unlock(&osd->lock);
2391 if (!err && ct_res == CALC_TARGET_POOL_DNE)
2392 send_map_check(req);
2395 downgrade_write(&osdc->lock);
2399 up_read(&osdc->lock);
2400 down_write(&osdc->lock);
2406 static void account_request(struct ceph_osd_request *req)
2408 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
2409 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2411 req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2412 atomic_inc(&req->r_osdc->num_requests);
2414 req->r_start_stamp = jiffies;
2415 req->r_start_latency = ktime_get();
2418 static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2420 ceph_osdc_get_request(req);
2421 account_request(req);
2422 __submit_request(req, wrlocked);
2425 static void finish_request(struct ceph_osd_request *req)
2427 struct ceph_osd_client *osdc = req->r_osdc;
2429 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2430 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2432 req->r_end_latency = ktime_get();
2435 unlink_request(req->r_osd, req);
2436 atomic_dec(&osdc->num_requests);
2439 * If an OSD has failed or returned and a request has been sent
2440 * twice, it's possible to get a reply and end up here while the
2441 * request message is queued for delivery. We will ignore the
2442 * reply, so not a big deal, but better to try and catch it.
2444 ceph_msg_revoke(req->r_request);
2445 ceph_msg_revoke_incoming(req->r_reply);
2448 static void __complete_request(struct ceph_osd_request *req)
2450 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
2451 req->r_tid, req->r_callback, req->r_result);
2453 if (req->r_callback)
2454 req->r_callback(req);
2455 complete_all(&req->r_completion);
2456 ceph_osdc_put_request(req);
2459 static void complete_request_workfn(struct work_struct *work)
2461 struct ceph_osd_request *req =
2462 container_of(work, struct ceph_osd_request, r_complete_work);
2464 __complete_request(req);
2468 * This is open-coded in handle_reply().
2470 static void complete_request(struct ceph_osd_request *req, int err)
2472 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2474 req->r_result = err;
2475 finish_request(req);
2477 INIT_WORK(&req->r_complete_work, complete_request_workfn);
2478 queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
2481 static void cancel_map_check(struct ceph_osd_request *req)
2483 struct ceph_osd_client *osdc = req->r_osdc;
2484 struct ceph_osd_request *lookup_req;
2486 verify_osdc_wrlocked(osdc);
2488 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2492 WARN_ON(lookup_req != req);
2493 erase_request_mc(&osdc->map_checks, req);
2494 ceph_osdc_put_request(req);
2497 static void cancel_request(struct ceph_osd_request *req)
2499 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2501 cancel_map_check(req);
2502 finish_request(req);
2503 complete_all(&req->r_completion);
2504 ceph_osdc_put_request(req);
2507 static void abort_request(struct ceph_osd_request *req, int err)
2509 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2511 cancel_map_check(req);
2512 complete_request(req, err);
2515 static int abort_fn(struct ceph_osd_request *req, void *arg)
2517 int err = *(int *)arg;
2519 abort_request(req, err);
2520 return 0; /* continue iteration */
2524 * Abort all in-flight requests with @err and arrange for all future
2525 * requests to be failed immediately.
2527 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2529 dout("%s osdc %p err %d\n", __func__, osdc, err);
2530 down_write(&osdc->lock);
2531 for_each_request(osdc, abort_fn, &err);
2532 osdc->abort_err = err;
2533 up_write(&osdc->lock);
2535 EXPORT_SYMBOL(ceph_osdc_abort_requests);
2537 void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc)
2539 down_write(&osdc->lock);
2540 osdc->abort_err = 0;
2541 up_write(&osdc->lock);
2543 EXPORT_SYMBOL(ceph_osdc_clear_abort_err);
2545 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2547 if (likely(eb > osdc->epoch_barrier)) {
2548 dout("updating epoch_barrier from %u to %u\n",
2549 osdc->epoch_barrier, eb);
2550 osdc->epoch_barrier = eb;
2551 /* Request map if we're not to the barrier yet */
2552 if (eb > osdc->osdmap->epoch)
2553 maybe_request_map(osdc);
2557 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2559 down_read(&osdc->lock);
2560 if (unlikely(eb > osdc->epoch_barrier)) {
2561 up_read(&osdc->lock);
2562 down_write(&osdc->lock);
2563 update_epoch_barrier(osdc, eb);
2564 up_write(&osdc->lock);
2566 up_read(&osdc->lock);
2569 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2572 * We can end up releasing caps as a result of abort_request().
2573 * In that case, we probably want to ensure that the cap release message
2574 * has an updated epoch barrier in it, so set the epoch barrier prior to
2575 * aborting the first request.
2577 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2579 struct ceph_osd_client *osdc = req->r_osdc;
2580 bool *victims = arg;
2582 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2583 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2584 pool_full(osdc, req->r_t.base_oloc.pool))) {
2586 update_epoch_barrier(osdc, osdc->osdmap->epoch);
2589 abort_request(req, -ENOSPC);
2592 return 0; /* continue iteration */
2596 * Drop all pending requests that are stalled waiting on a full condition to
2597 * clear, and complete them with ENOSPC as the return code. Set the
2598 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2601 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2603 bool victims = false;
2605 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
2606 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
2607 for_each_request(osdc, abort_on_full_fn, &victims);
2610 static void check_pool_dne(struct ceph_osd_request *req)
2612 struct ceph_osd_client *osdc = req->r_osdc;
2613 struct ceph_osdmap *map = osdc->osdmap;
2615 verify_osdc_wrlocked(osdc);
2616 WARN_ON(!map->epoch);
2618 if (req->r_attempts) {
2620 * We sent a request earlier, which means that
2621 * previously the pool existed, and now it does not
2622 * (i.e., it was deleted).
2624 req->r_map_dne_bound = map->epoch;
2625 dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2628 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2629 req, req->r_tid, req->r_map_dne_bound, map->epoch);
2632 if (req->r_map_dne_bound) {
2633 if (map->epoch >= req->r_map_dne_bound) {
2634 /* we had a new enough map */
2635 pr_info_ratelimited("tid %llu pool does not exist\n",
2637 complete_request(req, -ENOENT);
2640 send_map_check(req);
2644 static void map_check_cb(struct ceph_mon_generic_request *greq)
2646 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2647 struct ceph_osd_request *req;
2648 u64 tid = greq->private_data;
2650 WARN_ON(greq->result || !greq->u.newest);
2652 down_write(&osdc->lock);
2653 req = lookup_request_mc(&osdc->map_checks, tid);
2655 dout("%s tid %llu dne\n", __func__, tid);
2659 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2660 req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2661 if (!req->r_map_dne_bound)
2662 req->r_map_dne_bound = greq->u.newest;
2663 erase_request_mc(&osdc->map_checks, req);
2664 check_pool_dne(req);
2666 ceph_osdc_put_request(req);
2668 up_write(&osdc->lock);
2671 static void send_map_check(struct ceph_osd_request *req)
2673 struct ceph_osd_client *osdc = req->r_osdc;
2674 struct ceph_osd_request *lookup_req;
2677 verify_osdc_wrlocked(osdc);
2679 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2681 WARN_ON(lookup_req != req);
2685 ceph_osdc_get_request(req);
2686 insert_request_mc(&osdc->map_checks, req);
2687 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2688 map_check_cb, req->r_tid);
2693 * lingering requests, watch/notify v2 infrastructure
2695 static void linger_release(struct kref *kref)
2697 struct ceph_osd_linger_request *lreq =
2698 container_of(kref, struct ceph_osd_linger_request, kref);
2700 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2701 lreq->reg_req, lreq->ping_req);
2702 WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2703 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
2704 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2705 WARN_ON(!list_empty(&lreq->scan_item));
2706 WARN_ON(!list_empty(&lreq->pending_lworks));
2709 if (lreq->request_pl)
2710 ceph_pagelist_release(lreq->request_pl);
2711 if (lreq->notify_id_pages)
2712 ceph_release_page_vector(lreq->notify_id_pages, 1);
2714 ceph_osdc_put_request(lreq->reg_req);
2715 ceph_osdc_put_request(lreq->ping_req);
2716 target_destroy(&lreq->t);
2720 static void linger_put(struct ceph_osd_linger_request *lreq)
2723 kref_put(&lreq->kref, linger_release);
2726 static struct ceph_osd_linger_request *
2727 linger_get(struct ceph_osd_linger_request *lreq)
2729 kref_get(&lreq->kref);
2733 static struct ceph_osd_linger_request *
2734 linger_alloc(struct ceph_osd_client *osdc)
2736 struct ceph_osd_linger_request *lreq;
2738 lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2742 kref_init(&lreq->kref);
2743 mutex_init(&lreq->lock);
2744 RB_CLEAR_NODE(&lreq->node);
2745 RB_CLEAR_NODE(&lreq->osdc_node);
2746 RB_CLEAR_NODE(&lreq->mc_node);
2747 INIT_LIST_HEAD(&lreq->scan_item);
2748 INIT_LIST_HEAD(&lreq->pending_lworks);
2749 init_completion(&lreq->reg_commit_wait);
2750 init_completion(&lreq->notify_finish_wait);
2753 target_init(&lreq->t);
2755 dout("%s lreq %p\n", __func__, lreq);
2759 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2760 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
2761 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2764 * Create linger request <-> OSD session relation.
2766 * @lreq has to be registered, @osd may be homeless.
2768 static void link_linger(struct ceph_osd *osd,
2769 struct ceph_osd_linger_request *lreq)
2771 verify_osd_locked(osd);
2772 WARN_ON(!lreq->linger_id || lreq->osd);
2773 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2774 osd->o_osd, lreq, lreq->linger_id);
2776 if (!osd_homeless(osd))
2777 __remove_osd_from_lru(osd);
2779 atomic_inc(&osd->o_osdc->num_homeless);
2782 insert_linger(&osd->o_linger_requests, lreq);
2786 static void unlink_linger(struct ceph_osd *osd,
2787 struct ceph_osd_linger_request *lreq)
2789 verify_osd_locked(osd);
2790 WARN_ON(lreq->osd != osd);
2791 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2792 osd->o_osd, lreq, lreq->linger_id);
2795 erase_linger(&osd->o_linger_requests, lreq);
2798 if (!osd_homeless(osd))
2799 maybe_move_osd_to_lru(osd);
2801 atomic_dec(&osd->o_osdc->num_homeless);
2804 static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2806 verify_osdc_locked(lreq->osdc);
2808 return !RB_EMPTY_NODE(&lreq->osdc_node);
2811 static bool linger_registered(struct ceph_osd_linger_request *lreq)
2813 struct ceph_osd_client *osdc = lreq->osdc;
2816 down_read(&osdc->lock);
2817 registered = __linger_registered(lreq);
2818 up_read(&osdc->lock);
2823 static void linger_register(struct ceph_osd_linger_request *lreq)
2825 struct ceph_osd_client *osdc = lreq->osdc;
2827 verify_osdc_wrlocked(osdc);
2828 WARN_ON(lreq->linger_id);
2831 lreq->linger_id = ++osdc->last_linger_id;
2832 insert_linger_osdc(&osdc->linger_requests, lreq);
2835 static void linger_unregister(struct ceph_osd_linger_request *lreq)
2837 struct ceph_osd_client *osdc = lreq->osdc;
2839 verify_osdc_wrlocked(osdc);
2841 erase_linger_osdc(&osdc->linger_requests, lreq);
2845 static void cancel_linger_request(struct ceph_osd_request *req)
2847 struct ceph_osd_linger_request *lreq = req->r_priv;
2849 WARN_ON(!req->r_linger);
2850 cancel_request(req);
2854 struct linger_work {
2855 struct work_struct work;
2856 struct ceph_osd_linger_request *lreq;
2857 struct list_head pending_item;
2858 unsigned long queued_stamp;
2864 void *payload; /* points into @msg front */
2867 struct ceph_msg *msg; /* for ceph_msg_put() */
2875 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2878 struct linger_work *lwork;
2880 lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2884 INIT_WORK(&lwork->work, workfn);
2885 INIT_LIST_HEAD(&lwork->pending_item);
2886 lwork->lreq = linger_get(lreq);
2891 static void lwork_free(struct linger_work *lwork)
2893 struct ceph_osd_linger_request *lreq = lwork->lreq;
2895 mutex_lock(&lreq->lock);
2896 list_del(&lwork->pending_item);
2897 mutex_unlock(&lreq->lock);
2903 static void lwork_queue(struct linger_work *lwork)
2905 struct ceph_osd_linger_request *lreq = lwork->lreq;
2906 struct ceph_osd_client *osdc = lreq->osdc;
2908 verify_lreq_locked(lreq);
2909 WARN_ON(!list_empty(&lwork->pending_item));
2911 lwork->queued_stamp = jiffies;
2912 list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2913 queue_work(osdc->notify_wq, &lwork->work);
2916 static void do_watch_notify(struct work_struct *w)
2918 struct linger_work *lwork = container_of(w, struct linger_work, work);
2919 struct ceph_osd_linger_request *lreq = lwork->lreq;
2921 if (!linger_registered(lreq)) {
2922 dout("%s lreq %p not registered\n", __func__, lreq);
2926 WARN_ON(!lreq->is_watch);
2927 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2928 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2929 lwork->notify.payload_len);
2930 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2931 lwork->notify.notifier_id, lwork->notify.payload,
2932 lwork->notify.payload_len);
2935 ceph_msg_put(lwork->notify.msg);
2939 static void do_watch_error(struct work_struct *w)
2941 struct linger_work *lwork = container_of(w, struct linger_work, work);
2942 struct ceph_osd_linger_request *lreq = lwork->lreq;
2944 if (!linger_registered(lreq)) {
2945 dout("%s lreq %p not registered\n", __func__, lreq);
2949 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2950 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2956 static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2958 struct linger_work *lwork;
2960 lwork = lwork_alloc(lreq, do_watch_error);
2962 pr_err("failed to allocate error-lwork\n");
2966 lwork->error.err = lreq->last_error;
2970 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2973 if (!completion_done(&lreq->reg_commit_wait)) {
2974 lreq->reg_commit_error = (result <= 0 ? result : 0);
2975 complete_all(&lreq->reg_commit_wait);
2979 static void linger_commit_cb(struct ceph_osd_request *req)
2981 struct ceph_osd_linger_request *lreq = req->r_priv;
2983 mutex_lock(&lreq->lock);
2984 if (req != lreq->reg_req) {
2985 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
2986 __func__, lreq, lreq->linger_id, req, lreq->reg_req);
2990 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
2991 lreq->linger_id, req->r_result);
2992 linger_reg_commit_complete(lreq, req->r_result);
2993 lreq->committed = true;
2995 if (!lreq->is_watch) {
2996 struct ceph_osd_data *osd_data =
2997 osd_req_op_data(req, 0, notify, response_data);
2998 void *p = page_address(osd_data->pages[0]);
3000 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
3001 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
3003 /* make note of the notify_id */
3004 if (req->r_ops[0].outdata_len >= sizeof(u64)) {
3005 lreq->notify_id = ceph_decode_64(&p);
3006 dout("lreq %p notify_id %llu\n", lreq,
3009 dout("lreq %p no notify_id\n", lreq);
3014 mutex_unlock(&lreq->lock);
3018 static int normalize_watch_error(int err)
3021 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
3022 * notification and a failure to reconnect because we raced with
3023 * the delete appear the same to the user.
3031 static void linger_reconnect_cb(struct ceph_osd_request *req)
3033 struct ceph_osd_linger_request *lreq = req->r_priv;
3035 mutex_lock(&lreq->lock);
3036 if (req != lreq->reg_req) {
3037 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
3038 __func__, lreq, lreq->linger_id, req, lreq->reg_req);
3042 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
3043 lreq, lreq->linger_id, req->r_result, lreq->last_error);
3044 if (req->r_result < 0) {
3045 if (!lreq->last_error) {
3046 lreq->last_error = normalize_watch_error(req->r_result);
3047 queue_watch_error(lreq);
3052 mutex_unlock(&lreq->lock);
3056 static void send_linger(struct ceph_osd_linger_request *lreq)
3058 struct ceph_osd_client *osdc = lreq->osdc;
3059 struct ceph_osd_request *req;
3062 verify_osdc_wrlocked(osdc);
3063 mutex_lock(&lreq->lock);
3064 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3066 if (lreq->reg_req) {
3067 if (lreq->reg_req->r_osd)
3068 cancel_linger_request(lreq->reg_req);
3069 ceph_osdc_put_request(lreq->reg_req);
3072 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO);
3075 target_copy(&req->r_t, &lreq->t);
3076 req->r_mtime = lreq->mtime;
3078 if (lreq->is_watch && lreq->committed) {
3079 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_RECONNECT,
3080 lreq->linger_id, ++lreq->register_gen);
3081 dout("lreq %p reconnect register_gen %u\n", lreq,
3082 req->r_ops[0].watch.gen);
3083 req->r_callback = linger_reconnect_cb;
3085 if (lreq->is_watch) {
3086 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_WATCH,
3087 lreq->linger_id, 0);
3089 lreq->notify_id = 0;
3091 refcount_inc(&lreq->request_pl->refcnt);
3092 osd_req_op_notify_init(req, 0, lreq->linger_id,
3094 ceph_osd_data_pages_init(
3095 osd_req_op_data(req, 0, notify, response_data),
3096 lreq->notify_id_pages, PAGE_SIZE, 0, false, false);
3098 dout("lreq %p register\n", lreq);
3099 req->r_callback = linger_commit_cb;
3102 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3105 req->r_priv = linger_get(lreq);
3106 req->r_linger = true;
3107 lreq->reg_req = req;
3108 mutex_unlock(&lreq->lock);
3110 submit_request(req, true);
3113 static void linger_ping_cb(struct ceph_osd_request *req)
3115 struct ceph_osd_linger_request *lreq = req->r_priv;
3117 mutex_lock(&lreq->lock);
3118 if (req != lreq->ping_req) {
3119 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n",
3120 __func__, lreq, lreq->linger_id, req, lreq->ping_req);
3124 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3125 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3127 if (lreq->register_gen == req->r_ops[0].watch.gen) {
3128 if (!req->r_result) {
3129 lreq->watch_valid_thru = lreq->ping_sent;
3130 } else if (!lreq->last_error) {
3131 lreq->last_error = normalize_watch_error(req->r_result);
3132 queue_watch_error(lreq);
3135 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3136 lreq->register_gen, req->r_ops[0].watch.gen);
3140 mutex_unlock(&lreq->lock);
3144 static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3146 struct ceph_osd_client *osdc = lreq->osdc;
3147 struct ceph_osd_request *req;
3150 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
3151 dout("%s PAUSERD\n", __func__);
3155 lreq->ping_sent = jiffies;
3156 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3157 __func__, lreq, lreq->linger_id, lreq->ping_sent,
3158 lreq->register_gen);
3160 if (lreq->ping_req) {
3161 if (lreq->ping_req->r_osd)
3162 cancel_linger_request(lreq->ping_req);
3163 ceph_osdc_put_request(lreq->ping_req);
3166 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO);
3169 target_copy(&req->r_t, &lreq->t);
3170 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_PING, lreq->linger_id,
3171 lreq->register_gen);
3172 req->r_callback = linger_ping_cb;
3174 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
3177 req->r_priv = linger_get(lreq);
3178 req->r_linger = true;
3179 lreq->ping_req = req;
3181 ceph_osdc_get_request(req);
3182 account_request(req);
3183 req->r_tid = atomic64_inc_return(&osdc->last_tid);
3184 link_request(lreq->osd, req);
3188 static void linger_submit(struct ceph_osd_linger_request *lreq)
3190 struct ceph_osd_client *osdc = lreq->osdc;
3191 struct ceph_osd *osd;
3193 down_write(&osdc->lock);
3194 linger_register(lreq);
3196 calc_target(osdc, &lreq->t, false);
3197 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3198 link_linger(osd, lreq);
3201 up_write(&osdc->lock);
3204 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3206 struct ceph_osd_client *osdc = lreq->osdc;
3207 struct ceph_osd_linger_request *lookup_lreq;
3209 verify_osdc_wrlocked(osdc);
3211 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3216 WARN_ON(lookup_lreq != lreq);
3217 erase_linger_mc(&osdc->linger_map_checks, lreq);
3222 * @lreq has to be both registered and linked.
3224 static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3226 if (lreq->ping_req && lreq->ping_req->r_osd)
3227 cancel_linger_request(lreq->ping_req);
3228 if (lreq->reg_req && lreq->reg_req->r_osd)
3229 cancel_linger_request(lreq->reg_req);
3230 cancel_linger_map_check(lreq);
3231 unlink_linger(lreq->osd, lreq);
3232 linger_unregister(lreq);
3235 static void linger_cancel(struct ceph_osd_linger_request *lreq)
3237 struct ceph_osd_client *osdc = lreq->osdc;
3239 down_write(&osdc->lock);
3240 if (__linger_registered(lreq))
3241 __linger_cancel(lreq);
3242 up_write(&osdc->lock);
3245 static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3247 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3249 struct ceph_osd_client *osdc = lreq->osdc;
3250 struct ceph_osdmap *map = osdc->osdmap;
3252 verify_osdc_wrlocked(osdc);
3253 WARN_ON(!map->epoch);
3255 if (lreq->register_gen) {
3256 lreq->map_dne_bound = map->epoch;
3257 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3258 lreq, lreq->linger_id);
3260 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3261 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3265 if (lreq->map_dne_bound) {
3266 if (map->epoch >= lreq->map_dne_bound) {
3267 /* we had a new enough map */
3268 pr_info("linger_id %llu pool does not exist\n",
3270 linger_reg_commit_complete(lreq, -ENOENT);
3271 __linger_cancel(lreq);
3274 send_linger_map_check(lreq);
3278 static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3280 struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3281 struct ceph_osd_linger_request *lreq;
3282 u64 linger_id = greq->private_data;
3284 WARN_ON(greq->result || !greq->u.newest);
3286 down_write(&osdc->lock);
3287 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3289 dout("%s linger_id %llu dne\n", __func__, linger_id);
3293 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3294 __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3296 if (!lreq->map_dne_bound)
3297 lreq->map_dne_bound = greq->u.newest;
3298 erase_linger_mc(&osdc->linger_map_checks, lreq);
3299 check_linger_pool_dne(lreq);
3303 up_write(&osdc->lock);
3306 static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3308 struct ceph_osd_client *osdc = lreq->osdc;
3309 struct ceph_osd_linger_request *lookup_lreq;
3312 verify_osdc_wrlocked(osdc);
3314 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3317 WARN_ON(lookup_lreq != lreq);
3322 insert_linger_mc(&osdc->linger_map_checks, lreq);
3323 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3324 linger_map_check_cb, lreq->linger_id);
3328 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3332 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3333 ret = wait_for_completion_killable(&lreq->reg_commit_wait);
3334 return ret ?: lreq->reg_commit_error;
3337 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq,
3338 unsigned long timeout)
3342 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3343 left = wait_for_completion_killable_timeout(&lreq->notify_finish_wait,
3344 ceph_timeout_jiffies(timeout));
3346 left = left ?: -ETIMEDOUT;
3348 left = lreq->notify_finish_error; /* completed */
3354 * Timeout callback, called every N seconds. When 1 or more OSD
3355 * requests has been active for more than N seconds, we send a keepalive
3356 * (tag + timestamp) to its OSD to ensure any communications channel
3357 * reset is detected.
3359 static void handle_timeout(struct work_struct *work)
3361 struct ceph_osd_client *osdc =
3362 container_of(work, struct ceph_osd_client, timeout_work.work);
3363 struct ceph_options *opts = osdc->client->options;
3364 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3365 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3366 LIST_HEAD(slow_osds);
3367 struct rb_node *n, *p;
3369 dout("%s osdc %p\n", __func__, osdc);
3370 down_write(&osdc->lock);
3373 * ping osds that are a bit slow. this ensures that if there
3374 * is a break in the TCP connection we will notice, and reopen
3375 * a connection with that osd (from the fault callback).
3377 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3378 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3381 for (p = rb_first(&osd->o_requests); p; ) {
3382 struct ceph_osd_request *req =
3383 rb_entry(p, struct ceph_osd_request, r_node);
3385 p = rb_next(p); /* abort_request() */
3387 if (time_before(req->r_stamp, cutoff)) {
3388 dout(" req %p tid %llu on osd%d is laggy\n",
3389 req, req->r_tid, osd->o_osd);
3392 if (opts->osd_request_timeout &&
3393 time_before(req->r_start_stamp, expiry_cutoff)) {
3394 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3395 req->r_tid, osd->o_osd);
3396 abort_request(req, -ETIMEDOUT);
3399 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3400 struct ceph_osd_linger_request *lreq =
3401 rb_entry(p, struct ceph_osd_linger_request, node);
3403 dout(" lreq %p linger_id %llu is served by osd%d\n",
3404 lreq, lreq->linger_id, osd->o_osd);
3407 mutex_lock(&lreq->lock);
3408 if (lreq->is_watch && lreq->committed && !lreq->last_error)
3409 send_linger_ping(lreq);
3410 mutex_unlock(&lreq->lock);
3414 list_move_tail(&osd->o_keepalive_item, &slow_osds);
3417 if (opts->osd_request_timeout) {
3418 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3419 struct ceph_osd_request *req =
3420 rb_entry(p, struct ceph_osd_request, r_node);
3422 p = rb_next(p); /* abort_request() */
3424 if (time_before(req->r_start_stamp, expiry_cutoff)) {
3425 pr_err_ratelimited("tid %llu on osd%d timeout\n",
3426 req->r_tid, osdc->homeless_osd.o_osd);
3427 abort_request(req, -ETIMEDOUT);
3432 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3433 maybe_request_map(osdc);
3435 while (!list_empty(&slow_osds)) {
3436 struct ceph_osd *osd = list_first_entry(&slow_osds,
3439 list_del_init(&osd->o_keepalive_item);
3440 ceph_con_keepalive(&osd->o_con);
3443 up_write(&osdc->lock);
3444 schedule_delayed_work(&osdc->timeout_work,
3445 osdc->client->options->osd_keepalive_timeout);
3448 static void handle_osds_timeout(struct work_struct *work)
3450 struct ceph_osd_client *osdc =
3451 container_of(work, struct ceph_osd_client,
3452 osds_timeout_work.work);
3453 unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3454 struct ceph_osd *osd, *nosd;
3456 dout("%s osdc %p\n", __func__, osdc);
3457 down_write(&osdc->lock);
3458 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3459 if (time_before(jiffies, osd->lru_ttl))
3462 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3463 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3467 up_write(&osdc->lock);
3468 schedule_delayed_work(&osdc->osds_timeout_work,
3469 round_jiffies_relative(delay));
3472 static int ceph_oloc_decode(void **p, void *end,
3473 struct ceph_object_locator *oloc)
3475 u8 struct_v, struct_cv;
3480 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3481 struct_v = ceph_decode_8(p);
3482 struct_cv = ceph_decode_8(p);
3484 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3485 struct_v, struct_cv);
3488 if (struct_cv > 6) {
3489 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3490 struct_v, struct_cv);
3493 len = ceph_decode_32(p);
3494 ceph_decode_need(p, end, len, e_inval);
3495 struct_end = *p + len;
3497 oloc->pool = ceph_decode_64(p);
3498 *p += 4; /* skip preferred */
3500 len = ceph_decode_32(p);
3502 pr_warn("ceph_object_locator::key is set\n");
3506 if (struct_v >= 5) {
3507 bool changed = false;
3509 len = ceph_decode_32(p);
3511 ceph_decode_need(p, end, len, e_inval);
3512 if (!oloc->pool_ns ||
3513 ceph_compare_string(oloc->pool_ns, *p, len))
3521 /* redirect changes namespace */
3522 pr_warn("ceph_object_locator::nspace is changed\n");
3527 if (struct_v >= 6) {
3528 s64 hash = ceph_decode_64(p);
3530 pr_warn("ceph_object_locator::hash is set\n");
3545 static int ceph_redirect_decode(void **p, void *end,
3546 struct ceph_request_redirect *redir)
3548 u8 struct_v, struct_cv;
3553 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3554 struct_v = ceph_decode_8(p);
3555 struct_cv = ceph_decode_8(p);
3556 if (struct_cv > 1) {
3557 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3558 struct_v, struct_cv);
3561 len = ceph_decode_32(p);
3562 ceph_decode_need(p, end, len, e_inval);
3563 struct_end = *p + len;
3565 ret = ceph_oloc_decode(p, end, &redir->oloc);
3569 len = ceph_decode_32(p);
3571 pr_warn("ceph_request_redirect::object_name is set\n");
3585 struct MOSDOpReply {
3586 struct ceph_pg pgid;
3591 u32 outdata_len[CEPH_OSD_MAX_OPS];
3592 s32 rval[CEPH_OSD_MAX_OPS];
3594 struct ceph_eversion replay_version;
3596 struct ceph_request_redirect redirect;
3599 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
3601 void *p = msg->front.iov_base;
3602 void *const end = p + msg->front.iov_len;
3603 u16 version = le16_to_cpu(msg->hdr.version);
3604 struct ceph_eversion bad_replay_version;
3610 ceph_decode_32_safe(&p, end, len, e_inval);
3611 ceph_decode_need(&p, end, len, e_inval);
3612 p += len; /* skip oid */
3614 ret = ceph_decode_pgid(&p, end, &m->pgid);
3618 ceph_decode_64_safe(&p, end, m->flags, e_inval);
3619 ceph_decode_32_safe(&p, end, m->result, e_inval);
3620 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3621 memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3622 p += sizeof(bad_replay_version);
3623 ceph_decode_32_safe(&p, end, m->epoch, e_inval);
3625 ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3626 if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3629 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3631 for (i = 0; i < m->num_ops; i++) {
3632 struct ceph_osd_op *op = p;
3634 m->outdata_len[i] = le32_to_cpu(op->payload_len);
3638 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3639 for (i = 0; i < m->num_ops; i++)
3640 ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
3643 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3644 memcpy(&m->replay_version, p, sizeof(m->replay_version));
3645 p += sizeof(m->replay_version);
3646 ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3648 m->replay_version = bad_replay_version; /* struct */
3649 m->user_version = le64_to_cpu(m->replay_version.version);
3654 ceph_decode_8_safe(&p, end, decode_redir, e_inval);
3662 ret = ceph_redirect_decode(&p, end, &m->redirect);
3666 ceph_oloc_init(&m->redirect.oloc);
3676 * Handle MOSDOpReply. Set ->r_result and call the callback if it is
3679 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3681 struct ceph_osd_client *osdc = osd->o_osdc;
3682 struct ceph_osd_request *req;
3683 struct MOSDOpReply m;
3684 u64 tid = le64_to_cpu(msg->hdr.tid);
3689 dout("%s msg %p tid %llu\n", __func__, msg, tid);
3691 down_read(&osdc->lock);
3692 if (!osd_registered(osd)) {
3693 dout("%s osd%d unknown\n", __func__, osd->o_osd);
3694 goto out_unlock_osdc;
3696 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3698 mutex_lock(&osd->lock);
3699 req = lookup_request(&osd->o_requests, tid);
3701 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3702 goto out_unlock_session;
3705 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3706 ret = decode_MOSDOpReply(msg, &m);
3707 m.redirect.oloc.pool_ns = NULL;
3709 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3714 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3715 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3716 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3717 le64_to_cpu(m.replay_version.version), m.user_version);
3719 if (m.retry_attempt >= 0) {
3720 if (m.retry_attempt != req->r_attempts - 1) {
3721 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3722 req, req->r_tid, m.retry_attempt,
3723 req->r_attempts - 1);
3724 goto out_unlock_session;
3727 WARN_ON(1); /* MOSDOpReply v4 is assumed */
3730 if (!ceph_oloc_empty(&m.redirect.oloc)) {
3731 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3732 m.redirect.oloc.pool);
3733 unlink_request(osd, req);
3734 mutex_unlock(&osd->lock);
3737 * Not ceph_oloc_copy() - changing pool_ns is not
3740 req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3741 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED |
3742 CEPH_OSD_FLAG_IGNORE_OVERLAY |
3743 CEPH_OSD_FLAG_IGNORE_CACHE;
3745 __submit_request(req, false);
3746 goto out_unlock_osdc;
3749 if (m.result == -EAGAIN) {
3750 dout("req %p tid %llu EAGAIN\n", req, req->r_tid);
3751 unlink_request(osd, req);
3752 mutex_unlock(&osd->lock);
3755 * The object is missing on the replica or not (yet)
3756 * readable. Clear pgid to force a resend to the primary
3757 * via legacy_change.
3759 req->r_t.pgid.pool = 0;
3760 req->r_t.pgid.seed = 0;
3761 WARN_ON(!req->r_t.used_replica);
3762 req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS |
3763 CEPH_OSD_FLAG_LOCALIZE_READS);
3765 __submit_request(req, false);
3766 goto out_unlock_osdc;
3769 if (m.num_ops != req->r_num_ops) {
3770 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3771 req->r_num_ops, req->r_tid);
3774 for (i = 0; i < req->r_num_ops; i++) {
3775 dout(" req %p tid %llu op %d rval %d len %u\n", req,
3776 req->r_tid, i, m.rval[i], m.outdata_len[i]);
3777 req->r_ops[i].rval = m.rval[i];
3778 req->r_ops[i].outdata_len = m.outdata_len[i];
3779 data_len += m.outdata_len[i];
3781 if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3782 pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3783 le32_to_cpu(msg->hdr.data_len), req->r_tid);
3786 dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3787 req, req->r_tid, m.result, data_len);
3790 * Since we only ever request ONDISK, we should only ever get
3791 * one (type of) reply back.
3793 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
3794 req->r_result = m.result ?: data_len;
3795 finish_request(req);
3796 mutex_unlock(&osd->lock);
3797 up_read(&osdc->lock);
3799 __complete_request(req);
3803 complete_request(req, -EIO);
3805 mutex_unlock(&osd->lock);
3807 up_read(&osdc->lock);
3810 static void set_pool_was_full(struct ceph_osd_client *osdc)
3814 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3815 struct ceph_pg_pool_info *pi =
3816 rb_entry(n, struct ceph_pg_pool_info, node);
3818 pi->was_full = __pool_full(pi);
3822 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
3824 struct ceph_pg_pool_info *pi;
3826 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3830 return pi->was_full && !__pool_full(pi);
3833 static enum calc_target_result
3834 recalc_linger_target(struct ceph_osd_linger_request *lreq)
3836 struct ceph_osd_client *osdc = lreq->osdc;
3837 enum calc_target_result ct_res;
3839 ct_res = calc_target(osdc, &lreq->t, true);
3840 if (ct_res == CALC_TARGET_NEED_RESEND) {
3841 struct ceph_osd *osd;
3843 osd = lookup_create_osd(osdc, lreq->t.osd, true);
3844 if (osd != lreq->osd) {
3845 unlink_linger(lreq->osd, lreq);
3846 link_linger(osd, lreq);
3854 * Requeue requests whose mapping to an OSD has changed.
3856 static void scan_requests(struct ceph_osd *osd,
3859 bool check_pool_cleared_full,
3860 struct rb_root *need_resend,
3861 struct list_head *need_resend_linger)
3863 struct ceph_osd_client *osdc = osd->o_osdc;
3865 bool force_resend_writes;
3867 for (n = rb_first(&osd->o_linger_requests); n; ) {
3868 struct ceph_osd_linger_request *lreq =
3869 rb_entry(n, struct ceph_osd_linger_request, node);
3870 enum calc_target_result ct_res;
3872 n = rb_next(n); /* recalc_linger_target() */
3874 dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3876 ct_res = recalc_linger_target(lreq);
3878 case CALC_TARGET_NO_ACTION:
3879 force_resend_writes = cleared_full ||
3880 (check_pool_cleared_full &&
3881 pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3882 if (!force_resend && !force_resend_writes)
3886 case CALC_TARGET_NEED_RESEND:
3887 cancel_linger_map_check(lreq);
3889 * scan_requests() for the previous epoch(s)
3890 * may have already added it to the list, since
3891 * it's not unlinked here.
3893 if (list_empty(&lreq->scan_item))
3894 list_add_tail(&lreq->scan_item, need_resend_linger);
3896 case CALC_TARGET_POOL_DNE:
3897 list_del_init(&lreq->scan_item);
3898 check_linger_pool_dne(lreq);
3903 for (n = rb_first(&osd->o_requests); n; ) {
3904 struct ceph_osd_request *req =
3905 rb_entry(n, struct ceph_osd_request, r_node);
3906 enum calc_target_result ct_res;
3908 n = rb_next(n); /* unlink_request(), check_pool_dne() */
3910 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3911 ct_res = calc_target(osdc, &req->r_t, false);
3913 case CALC_TARGET_NO_ACTION:
3914 force_resend_writes = cleared_full ||
3915 (check_pool_cleared_full &&
3916 pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3917 if (!force_resend &&
3918 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3919 !force_resend_writes))
3923 case CALC_TARGET_NEED_RESEND:
3924 cancel_map_check(req);
3925 unlink_request(osd, req);
3926 insert_request(need_resend, req);
3928 case CALC_TARGET_POOL_DNE:
3929 check_pool_dne(req);
3935 static int handle_one_map(struct ceph_osd_client *osdc,
3936 void *p, void *end, bool incremental,
3937 struct rb_root *need_resend,
3938 struct list_head *need_resend_linger)
3940 struct ceph_osdmap *newmap;
3942 bool skipped_map = false;
3945 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3946 set_pool_was_full(osdc);
3949 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
3951 newmap = ceph_osdmap_decode(&p, end);
3953 return PTR_ERR(newmap);
3955 if (newmap != osdc->osdmap) {
3957 * Preserve ->was_full before destroying the old map.
3958 * For pools that weren't in the old map, ->was_full
3961 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3962 struct ceph_pg_pool_info *pi =
3963 rb_entry(n, struct ceph_pg_pool_info, node);
3964 struct ceph_pg_pool_info *old_pi;
3966 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3968 pi->was_full = old_pi->was_full;
3970 WARN_ON(pi->was_full);
3973 if (osdc->osdmap->epoch &&
3974 osdc->osdmap->epoch + 1 < newmap->epoch) {
3975 WARN_ON(incremental);
3979 ceph_osdmap_destroy(osdc->osdmap);
3980 osdc->osdmap = newmap;
3983 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3984 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3985 need_resend, need_resend_linger);
3987 for (n = rb_first(&osdc->osds); n; ) {
3988 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3990 n = rb_next(n); /* close_osd() */
3992 scan_requests(osd, skipped_map, was_full, true, need_resend,
3993 need_resend_linger);
3994 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3995 memcmp(&osd->o_con.peer_addr,
3996 ceph_osd_addr(osdc->osdmap, osd->o_osd),
3997 sizeof(struct ceph_entity_addr)))
4004 static void kick_requests(struct ceph_osd_client *osdc,
4005 struct rb_root *need_resend,
4006 struct list_head *need_resend_linger)
4008 struct ceph_osd_linger_request *lreq, *nlreq;
4009 enum calc_target_result ct_res;
4012 /* make sure need_resend targets reflect latest map */
4013 for (n = rb_first(need_resend); n; ) {
4014 struct ceph_osd_request *req =
4015 rb_entry(n, struct ceph_osd_request, r_node);
4019 if (req->r_t.epoch < osdc->osdmap->epoch) {
4020 ct_res = calc_target(osdc, &req->r_t, false);
4021 if (ct_res == CALC_TARGET_POOL_DNE) {
4022 erase_request(need_resend, req);
4023 check_pool_dne(req);
4028 for (n = rb_first(need_resend); n; ) {
4029 struct ceph_osd_request *req =
4030 rb_entry(n, struct ceph_osd_request, r_node);
4031 struct ceph_osd *osd;
4034 erase_request(need_resend, req); /* before link_request() */
4036 osd = lookup_create_osd(osdc, req->r_t.osd, true);
4037 link_request(osd, req);
4038 if (!req->r_linger) {
4039 if (!osd_homeless(osd) && !req->r_t.paused)
4042 cancel_linger_request(req);
4046 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
4047 if (!osd_homeless(lreq->osd))
4050 list_del_init(&lreq->scan_item);
4055 * Process updated osd map.
4057 * The message contains any number of incremental and full maps, normally
4058 * indicating some sort of topology change in the cluster. Kick requests
4059 * off to different OSDs as needed.
4061 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
4063 void *p = msg->front.iov_base;
4064 void *const end = p + msg->front.iov_len;
4065 u32 nr_maps, maplen;
4067 struct ceph_fsid fsid;
4068 struct rb_root need_resend = RB_ROOT;
4069 LIST_HEAD(need_resend_linger);
4070 bool handled_incremental = false;
4071 bool was_pauserd, was_pausewr;
4072 bool pauserd, pausewr;
4075 dout("%s have %u\n", __func__, osdc->osdmap->epoch);
4076 down_write(&osdc->lock);
4079 ceph_decode_need(&p, end, sizeof(fsid), bad);
4080 ceph_decode_copy(&p, &fsid, sizeof(fsid));
4081 if (ceph_check_fsid(osdc->client, &fsid) < 0)
4084 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4085 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4086 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4087 have_pool_full(osdc);
4089 /* incremental maps */
4090 ceph_decode_32_safe(&p, end, nr_maps, bad);
4091 dout(" %d inc maps\n", nr_maps);
4092 while (nr_maps > 0) {
4093 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4094 epoch = ceph_decode_32(&p);
4095 maplen = ceph_decode_32(&p);
4096 ceph_decode_need(&p, end, maplen, bad);
4097 if (osdc->osdmap->epoch &&
4098 osdc->osdmap->epoch + 1 == epoch) {
4099 dout("applying incremental map %u len %d\n",
4101 err = handle_one_map(osdc, p, p + maplen, true,
4102 &need_resend, &need_resend_linger);
4105 handled_incremental = true;
4107 dout("ignoring incremental map %u len %d\n",
4113 if (handled_incremental)
4117 ceph_decode_32_safe(&p, end, nr_maps, bad);
4118 dout(" %d full maps\n", nr_maps);
4120 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4121 epoch = ceph_decode_32(&p);
4122 maplen = ceph_decode_32(&p);
4123 ceph_decode_need(&p, end, maplen, bad);
4125 dout("skipping non-latest full map %u len %d\n",
4127 } else if (osdc->osdmap->epoch >= epoch) {
4128 dout("skipping full map %u len %d, "
4129 "older than our %u\n", epoch, maplen,
4130 osdc->osdmap->epoch);
4132 dout("taking full map %u len %d\n", epoch, maplen);
4133 err = handle_one_map(osdc, p, p + maplen, false,
4134 &need_resend, &need_resend_linger);
4144 * subscribe to subsequent osdmap updates if full to ensure
4145 * we find out when we are no longer full and stop returning
4148 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4149 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4150 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4151 have_pool_full(osdc);
4152 if (was_pauserd || was_pausewr || pauserd || pausewr ||
4153 osdc->osdmap->epoch < osdc->epoch_barrier)
4154 maybe_request_map(osdc);
4156 kick_requests(osdc, &need_resend, &need_resend_linger);
4158 ceph_osdc_abort_on_full(osdc);
4159 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4160 osdc->osdmap->epoch);
4161 up_write(&osdc->lock);
4162 wake_up_all(&osdc->client->auth_wq);
4166 pr_err("osdc handle_map corrupt msg\n");
4168 up_write(&osdc->lock);
4172 * Resubmit requests pending on the given osd.
4174 static void kick_osd_requests(struct ceph_osd *osd)
4178 clear_backoffs(osd);
4180 for (n = rb_first(&osd->o_requests); n; ) {
4181 struct ceph_osd_request *req =
4182 rb_entry(n, struct ceph_osd_request, r_node);
4184 n = rb_next(n); /* cancel_linger_request() */
4186 if (!req->r_linger) {
4187 if (!req->r_t.paused)
4190 cancel_linger_request(req);
4193 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4194 struct ceph_osd_linger_request *lreq =
4195 rb_entry(n, struct ceph_osd_linger_request, node);
4202 * If the osd connection drops, we need to resubmit all requests.
4204 static void osd_fault(struct ceph_connection *con)
4206 struct ceph_osd *osd = con->private;
4207 struct ceph_osd_client *osdc = osd->o_osdc;
4209 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4211 down_write(&osdc->lock);
4212 if (!osd_registered(osd)) {
4213 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4217 if (!reopen_osd(osd))
4218 kick_osd_requests(osd);
4219 maybe_request_map(osdc);
4222 up_write(&osdc->lock);
4225 struct MOSDBackoff {
4226 struct ceph_spg spgid;
4230 struct ceph_hobject_id *begin;
4231 struct ceph_hobject_id *end;
4234 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4236 void *p = msg->front.iov_base;
4237 void *const end = p + msg->front.iov_len;
4242 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4246 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4250 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4251 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4252 ceph_decode_8_safe(&p, end, m->op, e_inval);
4253 ceph_decode_64_safe(&p, end, m->id, e_inval);
4255 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4259 ret = decode_hoid(&p, end, m->begin);
4261 free_hoid(m->begin);
4265 m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4267 free_hoid(m->begin);
4271 ret = decode_hoid(&p, end, m->end);
4273 free_hoid(m->begin);
4284 static struct ceph_msg *create_backoff_message(
4285 const struct ceph_osd_backoff *backoff,
4288 struct ceph_msg *msg;
4292 msg_size = CEPH_ENCODING_START_BLK_LEN +
4293 CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4294 msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4295 msg_size += CEPH_ENCODING_START_BLK_LEN +
4296 hoid_encoding_size(backoff->begin);
4297 msg_size += CEPH_ENCODING_START_BLK_LEN +
4298 hoid_encoding_size(backoff->end);
4300 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4304 p = msg->front.iov_base;
4305 end = p + msg->front_alloc_len;
4307 encode_spgid(&p, &backoff->spgid);
4308 ceph_encode_32(&p, map_epoch);
4309 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4310 ceph_encode_64(&p, backoff->id);
4311 encode_hoid(&p, end, backoff->begin);
4312 encode_hoid(&p, end, backoff->end);
4315 msg->front.iov_len = p - msg->front.iov_base;
4316 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4317 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4322 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4324 struct ceph_spg_mapping *spg;
4325 struct ceph_osd_backoff *backoff;
4326 struct ceph_msg *msg;
4328 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4329 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4331 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4333 spg = alloc_spg_mapping();
4335 pr_err("%s failed to allocate spg\n", __func__);
4338 spg->spgid = m->spgid; /* struct */
4339 insert_spg_mapping(&osd->o_backoff_mappings, spg);
4342 backoff = alloc_backoff();
4344 pr_err("%s failed to allocate backoff\n", __func__);
4347 backoff->spgid = m->spgid; /* struct */
4348 backoff->id = m->id;
4349 backoff->begin = m->begin;
4350 m->begin = NULL; /* backoff now owns this */
4351 backoff->end = m->end;
4352 m->end = NULL; /* ditto */
4354 insert_backoff(&spg->backoffs, backoff);
4355 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4358 * Ack with original backoff's epoch so that the OSD can
4359 * discard this if there was a PG split.
4361 msg = create_backoff_message(backoff, m->map_epoch);
4363 pr_err("%s failed to allocate msg\n", __func__);
4366 ceph_con_send(&osd->o_con, msg);
4369 static bool target_contained_by(const struct ceph_osd_request_target *t,
4370 const struct ceph_hobject_id *begin,
4371 const struct ceph_hobject_id *end)
4373 struct ceph_hobject_id hoid;
4376 hoid_fill_from_target(&hoid, t);
4377 cmp = hoid_compare(&hoid, begin);
4378 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4381 static void handle_backoff_unblock(struct ceph_osd *osd,
4382 const struct MOSDBackoff *m)
4384 struct ceph_spg_mapping *spg;
4385 struct ceph_osd_backoff *backoff;
4388 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4389 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4391 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4393 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4394 __func__, osd->o_osd, m->spgid.pgid.pool,
4395 m->spgid.pgid.seed, m->spgid.shard, m->id);
4399 if (hoid_compare(backoff->begin, m->begin) &&
4400 hoid_compare(backoff->end, m->end)) {
4401 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4402 __func__, osd->o_osd, m->spgid.pgid.pool,
4403 m->spgid.pgid.seed, m->spgid.shard, m->id);
4404 /* unblock it anyway... */
4407 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4410 erase_backoff(&spg->backoffs, backoff);
4411 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4412 free_backoff(backoff);
4414 if (RB_EMPTY_ROOT(&spg->backoffs)) {
4415 erase_spg_mapping(&osd->o_backoff_mappings, spg);
4416 free_spg_mapping(spg);
4419 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4420 struct ceph_osd_request *req =
4421 rb_entry(n, struct ceph_osd_request, r_node);
4423 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4425 * Match against @m, not @backoff -- the PG may
4426 * have split on the OSD.
4428 if (target_contained_by(&req->r_t, m->begin, m->end)) {
4430 * If no other installed backoff applies,
4439 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4441 struct ceph_osd_client *osdc = osd->o_osdc;
4442 struct MOSDBackoff m;
4445 down_read(&osdc->lock);
4446 if (!osd_registered(osd)) {
4447 dout("%s osd%d unknown\n", __func__, osd->o_osd);
4448 up_read(&osdc->lock);
4451 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4453 mutex_lock(&osd->lock);
4454 ret = decode_MOSDBackoff(msg, &m);
4456 pr_err("failed to decode MOSDBackoff: %d\n", ret);
4462 case CEPH_OSD_BACKOFF_OP_BLOCK:
4463 handle_backoff_block(osd, &m);
4465 case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4466 handle_backoff_unblock(osd, &m);
4469 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4476 mutex_unlock(&osd->lock);
4477 up_read(&osdc->lock);
4481 * Process osd watch notifications
4483 static void handle_watch_notify(struct ceph_osd_client *osdc,
4484 struct ceph_msg *msg)
4486 void *p = msg->front.iov_base;
4487 void *const end = p + msg->front.iov_len;
4488 struct ceph_osd_linger_request *lreq;
4489 struct linger_work *lwork;
4490 u8 proto_ver, opcode;
4491 u64 cookie, notify_id;
4492 u64 notifier_id = 0;
4493 s32 return_code = 0;
4494 void *payload = NULL;
4495 u32 payload_len = 0;
4497 ceph_decode_8_safe(&p, end, proto_ver, bad);
4498 ceph_decode_8_safe(&p, end, opcode, bad);
4499 ceph_decode_64_safe(&p, end, cookie, bad);
4500 p += 8; /* skip ver */
4501 ceph_decode_64_safe(&p, end, notify_id, bad);
4503 if (proto_ver >= 1) {
4504 ceph_decode_32_safe(&p, end, payload_len, bad);
4505 ceph_decode_need(&p, end, payload_len, bad);
4510 if (le16_to_cpu(msg->hdr.version) >= 2)
4511 ceph_decode_32_safe(&p, end, return_code, bad);
4513 if (le16_to_cpu(msg->hdr.version) >= 3)
4514 ceph_decode_64_safe(&p, end, notifier_id, bad);
4516 down_read(&osdc->lock);
4517 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4519 dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4521 goto out_unlock_osdc;
4524 mutex_lock(&lreq->lock);
4525 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4526 opcode, cookie, lreq, lreq->is_watch);
4527 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4528 if (!lreq->last_error) {
4529 lreq->last_error = -ENOTCONN;
4530 queue_watch_error(lreq);
4532 } else if (!lreq->is_watch) {
4533 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4534 if (lreq->notify_id && lreq->notify_id != notify_id) {
4535 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4536 lreq->notify_id, notify_id);
4537 } else if (!completion_done(&lreq->notify_finish_wait)) {
4538 struct ceph_msg_data *data =
4539 msg->num_data_items ? &msg->data[0] : NULL;
4542 if (lreq->preply_pages) {
4543 WARN_ON(data->type !=
4544 CEPH_MSG_DATA_PAGES);
4545 *lreq->preply_pages = data->pages;
4546 *lreq->preply_len = data->length;
4547 data->own_pages = false;
4550 lreq->notify_finish_error = return_code;
4551 complete_all(&lreq->notify_finish_wait);
4554 /* CEPH_WATCH_EVENT_NOTIFY */
4555 lwork = lwork_alloc(lreq, do_watch_notify);
4557 pr_err("failed to allocate notify-lwork\n");
4558 goto out_unlock_lreq;
4561 lwork->notify.notify_id = notify_id;
4562 lwork->notify.notifier_id = notifier_id;
4563 lwork->notify.payload = payload;
4564 lwork->notify.payload_len = payload_len;
4565 lwork->notify.msg = ceph_msg_get(msg);
4570 mutex_unlock(&lreq->lock);
4572 up_read(&osdc->lock);
4576 pr_err("osdc handle_watch_notify corrupt msg\n");
4580 * Register request, send initial attempt.
4582 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4583 struct ceph_osd_request *req,
4586 down_read(&osdc->lock);
4587 submit_request(req, false);
4588 up_read(&osdc->lock);
4592 EXPORT_SYMBOL(ceph_osdc_start_request);
4595 * Unregister a registered request. The request is not completed:
4596 * ->r_result isn't set and __complete_request() isn't called.
4598 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4600 struct ceph_osd_client *osdc = req->r_osdc;
4602 down_write(&osdc->lock);
4604 cancel_request(req);
4605 up_write(&osdc->lock);
4607 EXPORT_SYMBOL(ceph_osdc_cancel_request);
4610 * @timeout: in jiffies, 0 means "wait forever"
4612 static int wait_request_timeout(struct ceph_osd_request *req,
4613 unsigned long timeout)
4617 dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4618 left = wait_for_completion_killable_timeout(&req->r_completion,
4619 ceph_timeout_jiffies(timeout));
4621 left = left ?: -ETIMEDOUT;
4622 ceph_osdc_cancel_request(req);
4624 left = req->r_result; /* completed */
4631 * wait for a request to complete
4633 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4634 struct ceph_osd_request *req)
4636 return wait_request_timeout(req, 0);
4638 EXPORT_SYMBOL(ceph_osdc_wait_request);
4641 * sync - wait for all in-flight requests to flush. avoid starvation.
4643 void ceph_osdc_sync(struct ceph_osd_client *osdc)
4645 struct rb_node *n, *p;
4646 u64 last_tid = atomic64_read(&osdc->last_tid);
4649 down_read(&osdc->lock);
4650 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4651 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4653 mutex_lock(&osd->lock);
4654 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4655 struct ceph_osd_request *req =
4656 rb_entry(p, struct ceph_osd_request, r_node);
4658 if (req->r_tid > last_tid)
4661 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4664 ceph_osdc_get_request(req);
4665 mutex_unlock(&osd->lock);
4666 up_read(&osdc->lock);
4667 dout("%s waiting on req %p tid %llu last_tid %llu\n",
4668 __func__, req, req->r_tid, last_tid);
4669 wait_for_completion(&req->r_completion);
4670 ceph_osdc_put_request(req);
4674 mutex_unlock(&osd->lock);
4677 up_read(&osdc->lock);
4678 dout("%s done last_tid %llu\n", __func__, last_tid);
4680 EXPORT_SYMBOL(ceph_osdc_sync);
4683 * Returns a handle, caller owns a ref.
4685 struct ceph_osd_linger_request *
4686 ceph_osdc_watch(struct ceph_osd_client *osdc,
4687 struct ceph_object_id *oid,
4688 struct ceph_object_locator *oloc,
4689 rados_watchcb2_t wcb,
4690 rados_watcherrcb_t errcb,
4693 struct ceph_osd_linger_request *lreq;
4696 lreq = linger_alloc(osdc);
4698 return ERR_PTR(-ENOMEM);
4700 lreq->is_watch = true;
4702 lreq->errcb = errcb;
4704 lreq->watch_valid_thru = jiffies;
4706 ceph_oid_copy(&lreq->t.base_oid, oid);
4707 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4708 lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4709 ktime_get_real_ts64(&lreq->mtime);
4711 linger_submit(lreq);
4712 ret = linger_reg_commit_wait(lreq);
4714 linger_cancel(lreq);
4722 return ERR_PTR(ret);
4724 EXPORT_SYMBOL(ceph_osdc_watch);
4729 * Times out after mount_timeout to preserve rbd unmap behaviour
4730 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4731 * with mount_timeout").
4733 int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4734 struct ceph_osd_linger_request *lreq)
4736 struct ceph_options *opts = osdc->client->options;
4737 struct ceph_osd_request *req;
4740 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4744 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4745 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4746 req->r_flags = CEPH_OSD_FLAG_WRITE;
4747 ktime_get_real_ts64(&req->r_mtime);
4748 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_UNWATCH,
4749 lreq->linger_id, 0);
4751 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4755 ceph_osdc_start_request(osdc, req, false);
4756 linger_cancel(lreq);
4758 ret = wait_request_timeout(req, opts->mount_timeout);
4761 ceph_osdc_put_request(req);
4764 EXPORT_SYMBOL(ceph_osdc_unwatch);
4766 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4767 u64 notify_id, u64 cookie, void *payload,
4770 struct ceph_osd_req_op *op;
4771 struct ceph_pagelist *pl;
4774 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4776 pl = ceph_pagelist_alloc(GFP_NOIO);
4780 ret = ceph_pagelist_encode_64(pl, notify_id);
4781 ret |= ceph_pagelist_encode_64(pl, cookie);
4783 ret |= ceph_pagelist_encode_32(pl, payload_len);
4784 ret |= ceph_pagelist_append(pl, payload, payload_len);
4786 ret |= ceph_pagelist_encode_32(pl, 0);
4789 ceph_pagelist_release(pl);
4793 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4794 op->indata_len = pl->length;
4798 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4799 struct ceph_object_id *oid,
4800 struct ceph_object_locator *oloc,
4806 struct ceph_osd_request *req;
4809 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4813 ceph_oid_copy(&req->r_base_oid, oid);
4814 ceph_oloc_copy(&req->r_base_oloc, oloc);
4815 req->r_flags = CEPH_OSD_FLAG_READ;
4817 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4822 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4826 ceph_osdc_start_request(osdc, req, false);
4827 ret = ceph_osdc_wait_request(osdc, req);
4830 ceph_osdc_put_request(req);
4833 EXPORT_SYMBOL(ceph_osdc_notify_ack);
4836 * @timeout: in seconds
4838 * @preply_{pages,len} are initialized both on success and error.
4839 * The caller is responsible for:
4841 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4843 int ceph_osdc_notify(struct ceph_osd_client *osdc,
4844 struct ceph_object_id *oid,
4845 struct ceph_object_locator *oloc,
4849 struct page ***preply_pages,
4852 struct ceph_osd_linger_request *lreq;
4857 *preply_pages = NULL;
4861 lreq = linger_alloc(osdc);
4865 lreq->request_pl = ceph_pagelist_alloc(GFP_NOIO);
4866 if (!lreq->request_pl) {
4871 ret = ceph_pagelist_encode_32(lreq->request_pl, 1); /* prot_ver */
4872 ret |= ceph_pagelist_encode_32(lreq->request_pl, timeout);
4873 ret |= ceph_pagelist_encode_32(lreq->request_pl, payload_len);
4874 ret |= ceph_pagelist_append(lreq->request_pl, payload, payload_len);
4881 lreq->notify_id_pages = ceph_alloc_page_vector(1, GFP_NOIO);
4882 if (IS_ERR(lreq->notify_id_pages)) {
4883 ret = PTR_ERR(lreq->notify_id_pages);
4884 lreq->notify_id_pages = NULL;
4888 lreq->preply_pages = preply_pages;
4889 lreq->preply_len = preply_len;
4891 ceph_oid_copy(&lreq->t.base_oid, oid);
4892 ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4893 lreq->t.flags = CEPH_OSD_FLAG_READ;
4895 linger_submit(lreq);
4896 ret = linger_reg_commit_wait(lreq);
4898 ret = linger_notify_finish_wait(lreq,
4899 msecs_to_jiffies(2 * timeout * MSEC_PER_SEC));
4901 dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4903 linger_cancel(lreq);
4908 EXPORT_SYMBOL(ceph_osdc_notify);
4911 * Return the number of milliseconds since the watch was last
4912 * confirmed, or an error. If there is an error, the watch is no
4913 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4915 int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4916 struct ceph_osd_linger_request *lreq)
4918 unsigned long stamp, age;
4921 down_read(&osdc->lock);
4922 mutex_lock(&lreq->lock);
4923 stamp = lreq->watch_valid_thru;
4924 if (!list_empty(&lreq->pending_lworks)) {
4925 struct linger_work *lwork =
4926 list_first_entry(&lreq->pending_lworks,
4930 if (time_before(lwork->queued_stamp, stamp))
4931 stamp = lwork->queued_stamp;
4933 age = jiffies - stamp;
4934 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4935 lreq, lreq->linger_id, age, lreq->last_error);
4936 /* we are truncating to msecs, so return a safe upper bound */
4937 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4939 mutex_unlock(&lreq->lock);
4940 up_read(&osdc->lock);
4944 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
4950 ret = ceph_start_decoding(p, end, 2, "watch_item_t",
4951 &struct_v, &struct_len);
4956 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
4957 ceph_decode_64_safe(p, end, item->cookie, bad);
4958 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
4960 if (struct_v >= 2) {
4961 ret = ceph_decode_entity_addr(p, end, &item->addr);
4968 dout("%s %s%llu cookie %llu addr %s\n", __func__,
4969 ENTITY_NAME(item->name), item->cookie,
4970 ceph_pr_addr(&item->addr));
4975 static int decode_watchers(void **p, void *end,
4976 struct ceph_watch_item **watchers,
4984 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
4985 &struct_v, &struct_len);
4989 *num_watchers = ceph_decode_32(p);
4990 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
4994 for (i = 0; i < *num_watchers; i++) {
4995 ret = decode_watcher(p, end, *watchers + i);
5006 * On success, the caller is responsible for:
5010 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
5011 struct ceph_object_id *oid,
5012 struct ceph_object_locator *oloc,
5013 struct ceph_watch_item **watchers,
5016 struct ceph_osd_request *req;
5017 struct page **pages;
5020 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5024 ceph_oid_copy(&req->r_base_oid, oid);
5025 ceph_oloc_copy(&req->r_base_oloc, oloc);
5026 req->r_flags = CEPH_OSD_FLAG_READ;
5028 pages = ceph_alloc_page_vector(1, GFP_NOIO);
5029 if (IS_ERR(pages)) {
5030 ret = PTR_ERR(pages);
5034 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
5035 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
5037 pages, PAGE_SIZE, 0, false, true);
5039 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5043 ceph_osdc_start_request(osdc, req, false);
5044 ret = ceph_osdc_wait_request(osdc, req);
5046 void *p = page_address(pages[0]);
5047 void *const end = p + req->r_ops[0].outdata_len;
5049 ret = decode_watchers(&p, end, watchers, num_watchers);
5053 ceph_osdc_put_request(req);
5056 EXPORT_SYMBOL(ceph_osdc_list_watchers);
5059 * Call all pending notify callbacks - for use after a watch is
5060 * unregistered, to make sure no more callbacks for it will be invoked
5062 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
5064 dout("%s osdc %p\n", __func__, osdc);
5065 flush_workqueue(osdc->notify_wq);
5067 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5069 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5071 down_read(&osdc->lock);
5072 maybe_request_map(osdc);
5073 up_read(&osdc->lock);
5075 EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
5078 * Execute an OSD class method on an object.
5080 * @flags: CEPH_OSD_FLAG_*
5081 * @resp_len: in/out param for reply length
5083 int ceph_osdc_call(struct ceph_osd_client *osdc,
5084 struct ceph_object_id *oid,
5085 struct ceph_object_locator *oloc,
5086 const char *class, const char *method,
5088 struct page *req_page, size_t req_len,
5089 struct page **resp_pages, size_t *resp_len)
5091 struct ceph_osd_request *req;
5094 if (req_len > PAGE_SIZE)
5097 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5101 ceph_oid_copy(&req->r_base_oid, oid);
5102 ceph_oloc_copy(&req->r_base_oloc, oloc);
5103 req->r_flags = flags;
5105 ret = osd_req_op_cls_init(req, 0, class, method);
5110 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5113 osd_req_op_cls_response_data_pages(req, 0, resp_pages,
5114 *resp_len, 0, false, false);
5116 ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5120 ceph_osdc_start_request(osdc, req, false);
5121 ret = ceph_osdc_wait_request(osdc, req);
5123 ret = req->r_ops[0].rval;
5125 *resp_len = req->r_ops[0].outdata_len;
5129 ceph_osdc_put_request(req);
5132 EXPORT_SYMBOL(ceph_osdc_call);
5135 * reset all osd connections
5137 void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc)
5141 down_write(&osdc->lock);
5142 for (n = rb_first(&osdc->osds); n; ) {
5143 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
5146 if (!reopen_osd(osd))
5147 kick_osd_requests(osd);
5149 up_write(&osdc->lock);
5155 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5160 osdc->client = client;
5161 init_rwsem(&osdc->lock);
5162 osdc->osds = RB_ROOT;
5163 INIT_LIST_HEAD(&osdc->osd_lru);
5164 spin_lock_init(&osdc->osd_lru_lock);
5165 osd_init(&osdc->homeless_osd);
5166 osdc->homeless_osd.o_osdc = osdc;
5167 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
5168 osdc->last_linger_id = CEPH_LINGER_ID_START;
5169 osdc->linger_requests = RB_ROOT;
5170 osdc->map_checks = RB_ROOT;
5171 osdc->linger_map_checks = RB_ROOT;
5172 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
5173 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5176 osdc->osdmap = ceph_osdmap_alloc();
5180 osdc->req_mempool = mempool_create_slab_pool(10,
5181 ceph_osd_request_cache);
5182 if (!osdc->req_mempool)
5185 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
5186 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
5189 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
5190 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5196 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
5197 if (!osdc->notify_wq)
5198 goto out_msgpool_reply;
5200 osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5201 if (!osdc->completion_wq)
5204 schedule_delayed_work(&osdc->timeout_work,
5205 osdc->client->options->osd_keepalive_timeout);
5206 schedule_delayed_work(&osdc->osds_timeout_work,
5207 round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5212 destroy_workqueue(osdc->notify_wq);
5214 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5216 ceph_msgpool_destroy(&osdc->msgpool_op);
5218 mempool_destroy(osdc->req_mempool);
5220 ceph_osdmap_destroy(osdc->osdmap);
5225 void ceph_osdc_stop(struct ceph_osd_client *osdc)
5227 destroy_workqueue(osdc->completion_wq);
5228 destroy_workqueue(osdc->notify_wq);
5229 cancel_delayed_work_sync(&osdc->timeout_work);
5230 cancel_delayed_work_sync(&osdc->osds_timeout_work);
5232 down_write(&osdc->lock);
5233 while (!RB_EMPTY_ROOT(&osdc->osds)) {
5234 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5235 struct ceph_osd, o_node);
5238 up_write(&osdc->lock);
5239 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5240 osd_cleanup(&osdc->homeless_osd);
5242 WARN_ON(!list_empty(&osdc->osd_lru));
5243 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
5244 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5245 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5246 WARN_ON(atomic_read(&osdc->num_requests));
5247 WARN_ON(atomic_read(&osdc->num_homeless));
5249 ceph_osdmap_destroy(osdc->osdmap);
5250 mempool_destroy(osdc->req_mempool);
5251 ceph_msgpool_destroy(&osdc->msgpool_op);
5252 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5255 static int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5256 u64 src_snapid, u64 src_version,
5257 struct ceph_object_id *src_oid,
5258 struct ceph_object_locator *src_oloc,
5259 u32 src_fadvise_flags,
5260 u32 dst_fadvise_flags,
5261 u32 truncate_seq, u64 truncate_size,
5264 struct ceph_osd_req_op *op;
5265 struct page **pages;
5268 pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5270 return PTR_ERR(pages);
5272 op = osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2,
5274 op->copy_from.snapid = src_snapid;
5275 op->copy_from.src_version = src_version;
5276 op->copy_from.flags = copy_from_flags;
5277 op->copy_from.src_fadvise_flags = src_fadvise_flags;
5279 p = page_address(pages[0]);
5280 end = p + PAGE_SIZE;
5281 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5282 encode_oloc(&p, end, src_oloc);
5283 ceph_encode_32(&p, truncate_seq);
5284 ceph_encode_64(&p, truncate_size);
5285 op->indata_len = PAGE_SIZE - (end - p);
5287 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5288 op->indata_len, 0, false, true);
5292 int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
5293 u64 src_snapid, u64 src_version,
5294 struct ceph_object_id *src_oid,
5295 struct ceph_object_locator *src_oloc,
5296 u32 src_fadvise_flags,
5297 struct ceph_object_id *dst_oid,
5298 struct ceph_object_locator *dst_oloc,
5299 u32 dst_fadvise_flags,
5300 u32 truncate_seq, u64 truncate_size,
5303 struct ceph_osd_request *req;
5306 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL);
5310 req->r_flags = CEPH_OSD_FLAG_WRITE;
5312 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
5313 ceph_oid_copy(&req->r_t.base_oid, dst_oid);
5315 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid,
5316 src_oloc, src_fadvise_flags,
5317 dst_fadvise_flags, truncate_seq,
5318 truncate_size, copy_from_flags);
5322 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL);
5326 ceph_osdc_start_request(osdc, req, false);
5327 ret = ceph_osdc_wait_request(osdc, req);
5330 ceph_osdc_put_request(req);
5333 EXPORT_SYMBOL(ceph_osdc_copy_from);
5335 int __init ceph_osdc_setup(void)
5337 size_t size = sizeof(struct ceph_osd_request) +
5338 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5340 BUG_ON(ceph_osd_request_cache);
5341 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5344 return ceph_osd_request_cache ? 0 : -ENOMEM;
5347 void ceph_osdc_cleanup(void)
5349 BUG_ON(!ceph_osd_request_cache);
5350 kmem_cache_destroy(ceph_osd_request_cache);
5351 ceph_osd_request_cache = NULL;
5355 * handle incoming message
5357 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5359 struct ceph_osd *osd = con->private;
5360 struct ceph_osd_client *osdc = osd->o_osdc;
5361 int type = le16_to_cpu(msg->hdr.type);
5364 case CEPH_MSG_OSD_MAP:
5365 ceph_osdc_handle_map(osdc, msg);
5367 case CEPH_MSG_OSD_OPREPLY:
5368 handle_reply(osd, msg);
5370 case CEPH_MSG_OSD_BACKOFF:
5371 handle_backoff(osd, msg);
5373 case CEPH_MSG_WATCH_NOTIFY:
5374 handle_watch_notify(osdc, msg);
5378 pr_err("received unknown message type %d %s\n", type,
5379 ceph_msg_type_name(type));
5386 * Lookup and return message for incoming reply. Don't try to do
5387 * anything about a larger than preallocated data portion of the
5388 * message at the moment - for now, just skip the message.
5390 static struct ceph_msg *get_reply(struct ceph_connection *con,
5391 struct ceph_msg_header *hdr,
5394 struct ceph_osd *osd = con->private;
5395 struct ceph_osd_client *osdc = osd->o_osdc;
5396 struct ceph_msg *m = NULL;
5397 struct ceph_osd_request *req;
5398 int front_len = le32_to_cpu(hdr->front_len);
5399 int data_len = le32_to_cpu(hdr->data_len);
5400 u64 tid = le64_to_cpu(hdr->tid);
5402 down_read(&osdc->lock);
5403 if (!osd_registered(osd)) {
5404 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5406 goto out_unlock_osdc;
5408 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5410 mutex_lock(&osd->lock);
5411 req = lookup_request(&osd->o_requests, tid);
5413 dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5416 goto out_unlock_session;
5419 ceph_msg_revoke_incoming(req->r_reply);
5421 if (front_len > req->r_reply->front_alloc_len) {
5422 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5423 __func__, osd->o_osd, req->r_tid, front_len,
5424 req->r_reply->front_alloc_len);
5425 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5428 goto out_unlock_session;
5429 ceph_msg_put(req->r_reply);
5433 if (data_len > req->r_reply->data_length) {
5434 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5435 __func__, osd->o_osd, req->r_tid, data_len,
5436 req->r_reply->data_length);
5439 goto out_unlock_session;
5442 m = ceph_msg_get(req->r_reply);
5443 dout("get_reply tid %lld %p\n", tid, m);
5446 mutex_unlock(&osd->lock);
5448 up_read(&osdc->lock);
5452 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5455 int type = le16_to_cpu(hdr->type);
5456 u32 front_len = le32_to_cpu(hdr->front_len);
5457 u32 data_len = le32_to_cpu(hdr->data_len);
5459 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
5464 struct page **pages;
5466 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5468 if (IS_ERR(pages)) {
5473 ceph_msg_data_add_pages(m, pages, data_len, 0, true);
5479 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5480 struct ceph_msg_header *hdr,
5483 struct ceph_osd *osd = con->private;
5484 int type = le16_to_cpu(hdr->type);
5488 case CEPH_MSG_OSD_MAP:
5489 case CEPH_MSG_OSD_BACKOFF:
5490 case CEPH_MSG_WATCH_NOTIFY:
5491 return alloc_msg_with_page_vector(hdr);
5492 case CEPH_MSG_OSD_OPREPLY:
5493 return get_reply(con, hdr, skip);
5495 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5503 * Wrappers to refcount containing ceph_osd struct
5505 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5507 struct ceph_osd *osd = con->private;
5513 static void put_osd_con(struct ceph_connection *con)
5515 struct ceph_osd *osd = con->private;
5523 * Note: returned pointer is the address of a structure that's
5524 * managed separately. Caller must *not* attempt to free it.
5526 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
5527 int *proto, int force_new)
5529 struct ceph_osd *o = con->private;
5530 struct ceph_osd_client *osdc = o->o_osdc;
5531 struct ceph_auth_client *ac = osdc->client->monc.auth;
5532 struct ceph_auth_handshake *auth = &o->o_auth;
5534 if (force_new && auth->authorizer) {
5535 ceph_auth_destroy_authorizer(auth->authorizer);
5536 auth->authorizer = NULL;
5538 if (!auth->authorizer) {
5539 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5542 return ERR_PTR(ret);
5544 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5547 return ERR_PTR(ret);
5549 *proto = ac->protocol;
5554 static int add_authorizer_challenge(struct ceph_connection *con,
5555 void *challenge_buf, int challenge_buf_len)
5557 struct ceph_osd *o = con->private;
5558 struct ceph_osd_client *osdc = o->o_osdc;
5559 struct ceph_auth_client *ac = osdc->client->monc.auth;
5561 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5562 challenge_buf, challenge_buf_len);
5565 static int verify_authorizer_reply(struct ceph_connection *con)
5567 struct ceph_osd *o = con->private;
5568 struct ceph_osd_client *osdc = o->o_osdc;
5569 struct ceph_auth_client *ac = osdc->client->monc.auth;
5571 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
5574 static int invalidate_authorizer(struct ceph_connection *con)
5576 struct ceph_osd *o = con->private;
5577 struct ceph_osd_client *osdc = o->o_osdc;
5578 struct ceph_auth_client *ac = osdc->client->monc.auth;
5580 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5581 return ceph_monc_validate_auth(&osdc->client->monc);
5584 static void osd_reencode_message(struct ceph_msg *msg)
5586 int type = le16_to_cpu(msg->hdr.type);
5588 if (type == CEPH_MSG_OSD_OP)
5589 encode_request_finish(msg);
5592 static int osd_sign_message(struct ceph_msg *msg)
5594 struct ceph_osd *o = msg->con->private;
5595 struct ceph_auth_handshake *auth = &o->o_auth;
5597 return ceph_auth_sign_message(auth, msg);
5600 static int osd_check_message_signature(struct ceph_msg *msg)
5602 struct ceph_osd *o = msg->con->private;
5603 struct ceph_auth_handshake *auth = &o->o_auth;
5605 return ceph_auth_check_message_signature(auth, msg);
5608 static const struct ceph_connection_operations osd_con_ops = {
5611 .dispatch = dispatch,
5612 .get_authorizer = get_authorizer,
5613 .add_authorizer_challenge = add_authorizer_challenge,
5614 .verify_authorizer_reply = verify_authorizer_reply,
5615 .invalidate_authorizer = invalidate_authorizer,
5616 .alloc_msg = alloc_msg,
5617 .reencode_message = osd_reencode_message,
5618 .sign_message = osd_sign_message,
5619 .check_message_signature = osd_check_message_signature,