2 #include <linux/ceph/ceph_debug.h>
4 #include <linux/module.h>
6 #include <linux/highmem.h>
8 #include <linux/pagemap.h>
9 #include <linux/slab.h>
10 #include <linux/uaccess.h>
12 #include <linux/bio.h>
15 #include <linux/ceph/libceph.h>
16 #include <linux/ceph/osd_client.h>
17 #include <linux/ceph/messenger.h>
18 #include <linux/ceph/decode.h>
19 #include <linux/ceph/auth.h>
20 #include <linux/ceph/pagelist.h>
22 #define OSD_OP_FRONT_LEN 4096
23 #define OSD_OPREPLY_FRONT_LEN 512
25 static struct kmem_cache *ceph_osd_request_cache;
27 static const struct ceph_connection_operations osd_con_ops;
29 static void __send_queued(struct ceph_osd_client *osdc);
30 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
31 static void __register_request(struct ceph_osd_client *osdc,
32 struct ceph_osd_request *req);
33 static void __unregister_linger_request(struct ceph_osd_client *osdc,
34 struct ceph_osd_request *req);
35 static void __send_request(struct ceph_osd_client *osdc,
36 struct ceph_osd_request *req);
39 * Implement client access to distributed object storage cluster.
41 * All data objects are stored within a cluster/cloud of OSDs, or
42 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
43 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
44 * remote daemons serving up and coordinating consistent and safe
47 * Cluster membership and the mapping of data objects onto storage devices
48 * are described by the osd map.
50 * We keep track of pending OSD requests (read, write), resubmit
51 * requests to different OSDs when the cluster topology/data layout
52 * change, or retry the affected requests when the communications
53 * channel with an OSD is reset.
57 * calculate the mapping of a file extent onto an object, and fill out the
58 * request accordingly. shorten extent as necessary if it crosses an
61 * fill osd op in request message.
63 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
64 u64 *objnum, u64 *objoff, u64 *objlen)
70 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
74 if (*objlen < orig_len) {
76 dout(" skipping last %llu, final file extent %llu~%llu\n",
77 orig_len - *plen, off, *plen);
80 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
85 static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
87 memset(osd_data, 0, sizeof (*osd_data));
88 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
91 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
92 struct page **pages, u64 length, u32 alignment,
93 bool pages_from_pool, bool own_pages)
95 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
96 osd_data->pages = pages;
97 osd_data->length = length;
98 osd_data->alignment = alignment;
99 osd_data->pages_from_pool = pages_from_pool;
100 osd_data->own_pages = own_pages;
103 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
104 struct ceph_pagelist *pagelist)
106 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
107 osd_data->pagelist = pagelist;
111 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
112 struct bio *bio, size_t bio_length)
114 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
116 osd_data->bio_length = bio_length;
118 #endif /* CONFIG_BLOCK */
120 #define osd_req_op_data(oreq, whch, typ, fld) \
122 BUG_ON(whch >= (oreq)->r_num_ops); \
123 &(oreq)->r_ops[whch].typ.fld; \
126 static struct ceph_osd_data *
127 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
129 BUG_ON(which >= osd_req->r_num_ops);
131 return &osd_req->r_ops[which].raw_data_in;
134 struct ceph_osd_data *
135 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
138 return osd_req_op_data(osd_req, which, extent, osd_data);
140 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
142 struct ceph_osd_data *
143 osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
146 return osd_req_op_data(osd_req, which, cls, response_data);
148 EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
150 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
151 unsigned int which, struct page **pages,
152 u64 length, u32 alignment,
153 bool pages_from_pool, bool own_pages)
155 struct ceph_osd_data *osd_data;
157 osd_data = osd_req_op_raw_data_in(osd_req, which);
158 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
159 pages_from_pool, own_pages);
161 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
163 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
164 unsigned int which, struct page **pages,
165 u64 length, u32 alignment,
166 bool pages_from_pool, bool own_pages)
168 struct ceph_osd_data *osd_data;
170 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
171 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
172 pages_from_pool, own_pages);
174 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
176 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
177 unsigned int which, struct ceph_pagelist *pagelist)
179 struct ceph_osd_data *osd_data;
181 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
182 ceph_osd_data_pagelist_init(osd_data, pagelist);
184 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
187 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
188 unsigned int which, struct bio *bio, size_t bio_length)
190 struct ceph_osd_data *osd_data;
192 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
193 ceph_osd_data_bio_init(osd_data, bio, bio_length);
195 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
196 #endif /* CONFIG_BLOCK */
198 static void osd_req_op_cls_request_info_pagelist(
199 struct ceph_osd_request *osd_req,
200 unsigned int which, struct ceph_pagelist *pagelist)
202 struct ceph_osd_data *osd_data;
204 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
205 ceph_osd_data_pagelist_init(osd_data, pagelist);
208 void osd_req_op_cls_request_data_pagelist(
209 struct ceph_osd_request *osd_req,
210 unsigned int which, struct ceph_pagelist *pagelist)
212 struct ceph_osd_data *osd_data;
214 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
215 ceph_osd_data_pagelist_init(osd_data, pagelist);
217 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
219 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
220 unsigned int which, struct page **pages, u64 length,
221 u32 alignment, bool pages_from_pool, bool own_pages)
223 struct ceph_osd_data *osd_data;
225 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
226 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
227 pages_from_pool, own_pages);
229 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
231 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
232 unsigned int which, struct page **pages, u64 length,
233 u32 alignment, bool pages_from_pool, bool own_pages)
235 struct ceph_osd_data *osd_data;
237 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
238 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
239 pages_from_pool, own_pages);
241 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
243 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
245 switch (osd_data->type) {
246 case CEPH_OSD_DATA_TYPE_NONE:
248 case CEPH_OSD_DATA_TYPE_PAGES:
249 return osd_data->length;
250 case CEPH_OSD_DATA_TYPE_PAGELIST:
251 return (u64)osd_data->pagelist->length;
253 case CEPH_OSD_DATA_TYPE_BIO:
254 return (u64)osd_data->bio_length;
255 #endif /* CONFIG_BLOCK */
257 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
262 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
264 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
267 num_pages = calc_pages_for((u64)osd_data->alignment,
268 (u64)osd_data->length);
269 ceph_release_page_vector(osd_data->pages, num_pages);
271 ceph_osd_data_init(osd_data);
274 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
277 struct ceph_osd_req_op *op;
279 BUG_ON(which >= osd_req->r_num_ops);
280 op = &osd_req->r_ops[which];
283 case CEPH_OSD_OP_READ:
284 case CEPH_OSD_OP_WRITE:
285 ceph_osd_data_release(&op->extent.osd_data);
287 case CEPH_OSD_OP_CALL:
288 ceph_osd_data_release(&op->cls.request_info);
289 ceph_osd_data_release(&op->cls.request_data);
290 ceph_osd_data_release(&op->cls.response_data);
300 void ceph_osdc_release_request(struct kref *kref)
302 struct ceph_osd_request *req;
305 req = container_of(kref, struct ceph_osd_request, r_kref);
307 ceph_msg_put(req->r_request);
309 ceph_msg_revoke_incoming(req->r_reply);
310 ceph_msg_put(req->r_reply);
313 for (which = 0; which < req->r_num_ops; which++)
314 osd_req_op_data_release(req, which);
316 ceph_put_snap_context(req->r_snapc);
318 mempool_free(req, req->r_osdc->req_mempool);
320 kmem_cache_free(ceph_osd_request_cache, req);
323 EXPORT_SYMBOL(ceph_osdc_release_request);
325 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
326 struct ceph_snap_context *snapc,
327 unsigned int num_ops,
331 struct ceph_osd_request *req;
332 struct ceph_msg *msg;
335 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
336 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
338 msg_size = 4 + 4 + 8 + 8 + 4+8;
339 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
340 msg_size += 1 + 8 + 4 + 4; /* pg_t */
341 msg_size += 4 + MAX_OBJ_NAME_SIZE;
342 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
343 msg_size += 8; /* snapid */
344 msg_size += 8; /* snap_seq */
345 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
349 req = mempool_alloc(osdc->req_mempool, gfp_flags);
350 memset(req, 0, sizeof(*req));
352 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
358 req->r_mempool = use_mempool;
359 req->r_num_ops = num_ops;
361 kref_init(&req->r_kref);
362 init_completion(&req->r_completion);
363 init_completion(&req->r_safe_completion);
364 RB_CLEAR_NODE(&req->r_node);
365 INIT_LIST_HEAD(&req->r_unsafe_item);
366 INIT_LIST_HEAD(&req->r_linger_item);
367 INIT_LIST_HEAD(&req->r_linger_osd);
368 INIT_LIST_HEAD(&req->r_req_lru_item);
369 INIT_LIST_HEAD(&req->r_osd_item);
371 /* create reply message */
373 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
375 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
376 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
378 ceph_osdc_put_request(req);
383 /* create request message; allow space for oid */
385 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
387 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
389 ceph_osdc_put_request(req);
393 memset(msg->front.iov_base, 0, msg->front.iov_len);
395 req->r_request = msg;
399 EXPORT_SYMBOL(ceph_osdc_alloc_request);
401 static bool osd_req_opcode_valid(u16 opcode)
404 case CEPH_OSD_OP_READ:
405 case CEPH_OSD_OP_STAT:
406 case CEPH_OSD_OP_MAPEXT:
407 case CEPH_OSD_OP_MASKTRUNC:
408 case CEPH_OSD_OP_SPARSE_READ:
409 case CEPH_OSD_OP_NOTIFY:
410 case CEPH_OSD_OP_NOTIFY_ACK:
411 case CEPH_OSD_OP_ASSERT_VER:
412 case CEPH_OSD_OP_WRITE:
413 case CEPH_OSD_OP_WRITEFULL:
414 case CEPH_OSD_OP_TRUNCATE:
415 case CEPH_OSD_OP_ZERO:
416 case CEPH_OSD_OP_DELETE:
417 case CEPH_OSD_OP_APPEND:
418 case CEPH_OSD_OP_STARTSYNC:
419 case CEPH_OSD_OP_SETTRUNC:
420 case CEPH_OSD_OP_TRIMTRUNC:
421 case CEPH_OSD_OP_TMAPUP:
422 case CEPH_OSD_OP_TMAPPUT:
423 case CEPH_OSD_OP_TMAPGET:
424 case CEPH_OSD_OP_CREATE:
425 case CEPH_OSD_OP_ROLLBACK:
426 case CEPH_OSD_OP_WATCH:
427 case CEPH_OSD_OP_OMAPGETKEYS:
428 case CEPH_OSD_OP_OMAPGETVALS:
429 case CEPH_OSD_OP_OMAPGETHEADER:
430 case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
431 case CEPH_OSD_OP_OMAPSETVALS:
432 case CEPH_OSD_OP_OMAPSETHEADER:
433 case CEPH_OSD_OP_OMAPCLEAR:
434 case CEPH_OSD_OP_OMAPRMKEYS:
435 case CEPH_OSD_OP_OMAP_CMP:
436 case CEPH_OSD_OP_CLONERANGE:
437 case CEPH_OSD_OP_ASSERT_SRC_VERSION:
438 case CEPH_OSD_OP_SRC_CMPXATTR:
439 case CEPH_OSD_OP_GETXATTR:
440 case CEPH_OSD_OP_GETXATTRS:
441 case CEPH_OSD_OP_CMPXATTR:
442 case CEPH_OSD_OP_SETXATTR:
443 case CEPH_OSD_OP_SETXATTRS:
444 case CEPH_OSD_OP_RESETXATTRS:
445 case CEPH_OSD_OP_RMXATTR:
446 case CEPH_OSD_OP_PULL:
447 case CEPH_OSD_OP_PUSH:
448 case CEPH_OSD_OP_BALANCEREADS:
449 case CEPH_OSD_OP_UNBALANCEREADS:
450 case CEPH_OSD_OP_SCRUB:
451 case CEPH_OSD_OP_SCRUB_RESERVE:
452 case CEPH_OSD_OP_SCRUB_UNRESERVE:
453 case CEPH_OSD_OP_SCRUB_STOP:
454 case CEPH_OSD_OP_SCRUB_MAP:
455 case CEPH_OSD_OP_WRLOCK:
456 case CEPH_OSD_OP_WRUNLOCK:
457 case CEPH_OSD_OP_RDLOCK:
458 case CEPH_OSD_OP_RDUNLOCK:
459 case CEPH_OSD_OP_UPLOCK:
460 case CEPH_OSD_OP_DNLOCK:
461 case CEPH_OSD_OP_CALL:
462 case CEPH_OSD_OP_PGLS:
463 case CEPH_OSD_OP_PGLS_FILTER:
471 * This is an osd op init function for opcodes that have no data or
472 * other information associated with them. It also serves as a
473 * common init routine for all the other init functions, below.
475 static struct ceph_osd_req_op *
476 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
479 struct ceph_osd_req_op *op;
481 BUG_ON(which >= osd_req->r_num_ops);
482 BUG_ON(!osd_req_opcode_valid(opcode));
484 op = &osd_req->r_ops[which];
485 memset(op, 0, sizeof (*op));
491 void osd_req_op_init(struct ceph_osd_request *osd_req,
492 unsigned int which, u16 opcode)
494 (void)_osd_req_op_init(osd_req, which, opcode);
496 EXPORT_SYMBOL(osd_req_op_init);
498 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
499 unsigned int which, u16 opcode,
500 u64 offset, u64 length,
501 u64 truncate_size, u32 truncate_seq)
503 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
504 size_t payload_len = 0;
506 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
507 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
508 opcode != CEPH_OSD_OP_TRUNCATE);
510 op->extent.offset = offset;
511 op->extent.length = length;
512 op->extent.truncate_size = truncate_size;
513 op->extent.truncate_seq = truncate_seq;
514 if (opcode == CEPH_OSD_OP_WRITE)
515 payload_len += length;
517 op->payload_len = payload_len;
519 EXPORT_SYMBOL(osd_req_op_extent_init);
521 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
522 unsigned int which, u64 length)
524 struct ceph_osd_req_op *op;
527 BUG_ON(which >= osd_req->r_num_ops);
528 op = &osd_req->r_ops[which];
529 previous = op->extent.length;
531 if (length == previous)
532 return; /* Nothing to do */
533 BUG_ON(length > previous);
535 op->extent.length = length;
536 op->payload_len -= previous - length;
538 EXPORT_SYMBOL(osd_req_op_extent_update);
540 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
541 u16 opcode, const char *class, const char *method)
543 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
544 struct ceph_pagelist *pagelist;
545 size_t payload_len = 0;
548 BUG_ON(opcode != CEPH_OSD_OP_CALL);
550 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
552 ceph_pagelist_init(pagelist);
554 op->cls.class_name = class;
555 size = strlen(class);
556 BUG_ON(size > (size_t) U8_MAX);
557 op->cls.class_len = size;
558 ceph_pagelist_append(pagelist, class, size);
561 op->cls.method_name = method;
562 size = strlen(method);
563 BUG_ON(size > (size_t) U8_MAX);
564 op->cls.method_len = size;
565 ceph_pagelist_append(pagelist, method, size);
568 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
570 op->cls.argc = 0; /* currently unused */
572 op->payload_len = payload_len;
574 EXPORT_SYMBOL(osd_req_op_cls_init);
576 void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
577 unsigned int which, u16 opcode,
578 u64 cookie, u64 version, int flag)
580 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
582 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
584 op->watch.cookie = cookie;
585 op->watch.ver = version;
586 if (opcode == CEPH_OSD_OP_WATCH && flag)
587 op->watch.flag = (u8)1;
589 EXPORT_SYMBOL(osd_req_op_watch_init);
591 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
592 struct ceph_osd_data *osd_data)
594 u64 length = ceph_osd_data_length(osd_data);
596 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
597 BUG_ON(length > (u64) SIZE_MAX);
599 ceph_msg_data_add_pages(msg, osd_data->pages,
600 length, osd_data->alignment);
601 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
603 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
605 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
606 ceph_msg_data_add_bio(msg, osd_data->bio, length);
609 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
613 static u64 osd_req_encode_op(struct ceph_osd_request *req,
614 struct ceph_osd_op *dst, unsigned int which)
616 struct ceph_osd_req_op *src;
617 struct ceph_osd_data *osd_data;
618 u64 request_data_len = 0;
621 BUG_ON(which >= req->r_num_ops);
622 src = &req->r_ops[which];
623 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
624 pr_err("unrecognized osd opcode %d\n", src->op);
630 case CEPH_OSD_OP_STAT:
631 osd_data = &src->raw_data_in;
632 ceph_osdc_msg_data_add(req->r_reply, osd_data);
634 case CEPH_OSD_OP_READ:
635 case CEPH_OSD_OP_WRITE:
636 case CEPH_OSD_OP_ZERO:
637 case CEPH_OSD_OP_DELETE:
638 case CEPH_OSD_OP_TRUNCATE:
639 if (src->op == CEPH_OSD_OP_WRITE)
640 request_data_len = src->extent.length;
641 dst->extent.offset = cpu_to_le64(src->extent.offset);
642 dst->extent.length = cpu_to_le64(src->extent.length);
643 dst->extent.truncate_size =
644 cpu_to_le64(src->extent.truncate_size);
645 dst->extent.truncate_seq =
646 cpu_to_le32(src->extent.truncate_seq);
647 osd_data = &src->extent.osd_data;
648 if (src->op == CEPH_OSD_OP_WRITE)
649 ceph_osdc_msg_data_add(req->r_request, osd_data);
651 ceph_osdc_msg_data_add(req->r_reply, osd_data);
653 case CEPH_OSD_OP_CALL:
654 dst->cls.class_len = src->cls.class_len;
655 dst->cls.method_len = src->cls.method_len;
656 osd_data = &src->cls.request_info;
657 ceph_osdc_msg_data_add(req->r_request, osd_data);
658 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
659 request_data_len = osd_data->pagelist->length;
661 osd_data = &src->cls.request_data;
662 data_length = ceph_osd_data_length(osd_data);
664 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
665 dst->cls.indata_len = cpu_to_le32(data_length);
666 ceph_osdc_msg_data_add(req->r_request, osd_data);
667 src->payload_len += data_length;
668 request_data_len += data_length;
670 osd_data = &src->cls.response_data;
671 ceph_osdc_msg_data_add(req->r_reply, osd_data);
673 case CEPH_OSD_OP_STARTSYNC:
675 case CEPH_OSD_OP_NOTIFY_ACK:
676 case CEPH_OSD_OP_WATCH:
677 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
678 dst->watch.ver = cpu_to_le64(src->watch.ver);
679 dst->watch.flag = src->watch.flag;
682 pr_err("unsupported osd opcode %s\n",
683 ceph_osd_op_name(src->op));
688 dst->op = cpu_to_le16(src->op);
689 dst->payload_len = cpu_to_le32(src->payload_len);
691 return request_data_len;
695 * build new request AND message, calculate layout, and adjust file
698 * if the file was recently truncated, we include information about its
699 * old and new size so that the object can be updated appropriately. (we
700 * avoid synchronously deleting truncated objects because it's slow.)
702 * if @do_sync, include a 'startsync' command so that the osd will flush
705 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
706 struct ceph_file_layout *layout,
707 struct ceph_vino vino,
708 u64 off, u64 *plen, int num_ops,
709 int opcode, int flags,
710 struct ceph_snap_context *snapc,
715 struct ceph_osd_request *req;
723 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
724 opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
725 opcode != CEPH_OSD_OP_TRUNCATE);
727 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
730 return ERR_PTR(-ENOMEM);
732 req->r_flags = flags;
734 /* calculate max write size */
735 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
737 ceph_osdc_put_request(req);
741 object_size = le32_to_cpu(layout->fl_object_size);
742 object_base = off - objoff;
743 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
744 if (truncate_size <= object_base) {
747 truncate_size -= object_base;
748 if (truncate_size > object_size)
749 truncate_size = object_size;
753 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
754 truncate_size, truncate_seq);
757 * A second op in the ops array means the caller wants to
758 * also issue a include a 'startsync' command so that the
759 * osd will flush data quickly.
762 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
764 req->r_file_layout = *layout; /* keep a copy */
766 snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
768 req->r_oid_len = strlen(req->r_oid);
772 EXPORT_SYMBOL(ceph_osdc_new_request);
775 * We keep osd requests in an rbtree, sorted by ->r_tid.
777 static void __insert_request(struct ceph_osd_client *osdc,
778 struct ceph_osd_request *new)
780 struct rb_node **p = &osdc->requests.rb_node;
781 struct rb_node *parent = NULL;
782 struct ceph_osd_request *req = NULL;
786 req = rb_entry(parent, struct ceph_osd_request, r_node);
787 if (new->r_tid < req->r_tid)
789 else if (new->r_tid > req->r_tid)
795 rb_link_node(&new->r_node, parent, p);
796 rb_insert_color(&new->r_node, &osdc->requests);
799 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
802 struct ceph_osd_request *req;
803 struct rb_node *n = osdc->requests.rb_node;
806 req = rb_entry(n, struct ceph_osd_request, r_node);
807 if (tid < req->r_tid)
809 else if (tid > req->r_tid)
817 static struct ceph_osd_request *
818 __lookup_request_ge(struct ceph_osd_client *osdc,
821 struct ceph_osd_request *req;
822 struct rb_node *n = osdc->requests.rb_node;
825 req = rb_entry(n, struct ceph_osd_request, r_node);
826 if (tid < req->r_tid) {
830 } else if (tid > req->r_tid) {
840 * Resubmit requests pending on the given osd.
842 static void __kick_osd_requests(struct ceph_osd_client *osdc,
843 struct ceph_osd *osd)
845 struct ceph_osd_request *req, *nreq;
849 dout("__kick_osd_requests osd%d\n", osd->o_osd);
850 err = __reset_osd(osdc, osd);
854 * Build up a list of requests to resend by traversing the
855 * osd's list of requests. Requests for a given object are
856 * sent in tid order, and that is also the order they're
857 * kept on this list. Therefore all requests that are in
858 * flight will be found first, followed by all requests that
859 * have not yet been sent. And to resend requests while
860 * preserving this order we will want to put any sent
861 * requests back on the front of the osd client's unsent
864 * So we build a separate ordered list of already-sent
865 * requests for the affected osd and splice it onto the
866 * front of the osd client's unsent list. Once we've seen a
867 * request that has not yet been sent we're done. Those
868 * requests are already sitting right where they belong.
870 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
873 list_move_tail(&req->r_req_lru_item, &resend);
874 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
877 req->r_flags |= CEPH_OSD_FLAG_RETRY;
879 list_splice(&resend, &osdc->req_unsent);
882 * Linger requests are re-registered before sending, which
883 * sets up a new tid for each. We add them to the unsent
884 * list at the end to keep things in tid order.
886 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
889 * reregister request prior to unregistering linger so
890 * that r_osd is preserved.
892 BUG_ON(!list_empty(&req->r_req_lru_item));
893 __register_request(osdc, req);
894 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
895 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
896 __unregister_linger_request(osdc, req);
897 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
903 * If the osd connection drops, we need to resubmit all requests.
905 static void osd_reset(struct ceph_connection *con)
907 struct ceph_osd *osd = con->private;
908 struct ceph_osd_client *osdc;
912 dout("osd_reset osd%d\n", osd->o_osd);
914 down_read(&osdc->map_sem);
915 mutex_lock(&osdc->request_mutex);
916 __kick_osd_requests(osdc, osd);
918 mutex_unlock(&osdc->request_mutex);
919 up_read(&osdc->map_sem);
923 * Track open sessions with osds.
925 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
927 struct ceph_osd *osd;
929 osd = kzalloc(sizeof(*osd), GFP_NOFS);
933 atomic_set(&osd->o_ref, 1);
936 RB_CLEAR_NODE(&osd->o_node);
937 INIT_LIST_HEAD(&osd->o_requests);
938 INIT_LIST_HEAD(&osd->o_linger_requests);
939 INIT_LIST_HEAD(&osd->o_osd_lru);
940 osd->o_incarnation = 1;
942 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
944 INIT_LIST_HEAD(&osd->o_keepalive_item);
948 static struct ceph_osd *get_osd(struct ceph_osd *osd)
950 if (atomic_inc_not_zero(&osd->o_ref)) {
951 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
952 atomic_read(&osd->o_ref));
955 dout("get_osd %p FAIL\n", osd);
960 static void put_osd(struct ceph_osd *osd)
962 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
963 atomic_read(&osd->o_ref) - 1);
964 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
965 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
967 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
973 * remove an osd from our map
975 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
977 dout("__remove_osd %p\n", osd);
978 BUG_ON(!list_empty(&osd->o_requests));
979 rb_erase(&osd->o_node, &osdc->osds);
980 list_del_init(&osd->o_osd_lru);
981 ceph_con_close(&osd->o_con);
985 static void remove_all_osds(struct ceph_osd_client *osdc)
987 dout("%s %p\n", __func__, osdc);
988 mutex_lock(&osdc->request_mutex);
989 while (!RB_EMPTY_ROOT(&osdc->osds)) {
990 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
991 struct ceph_osd, o_node);
992 __remove_osd(osdc, osd);
994 mutex_unlock(&osdc->request_mutex);
997 static void __move_osd_to_lru(struct ceph_osd_client *osdc,
998 struct ceph_osd *osd)
1000 dout("__move_osd_to_lru %p\n", osd);
1001 BUG_ON(!list_empty(&osd->o_osd_lru));
1002 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1003 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
1006 static void __remove_osd_from_lru(struct ceph_osd *osd)
1008 dout("__remove_osd_from_lru %p\n", osd);
1009 if (!list_empty(&osd->o_osd_lru))
1010 list_del_init(&osd->o_osd_lru);
1013 static void remove_old_osds(struct ceph_osd_client *osdc)
1015 struct ceph_osd *osd, *nosd;
1017 dout("__remove_old_osds %p\n", osdc);
1018 mutex_lock(&osdc->request_mutex);
1019 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1020 if (time_before(jiffies, osd->lru_ttl))
1022 __remove_osd(osdc, osd);
1024 mutex_unlock(&osdc->request_mutex);
1030 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1032 struct ceph_entity_addr *peer_addr;
1034 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1035 if (list_empty(&osd->o_requests) &&
1036 list_empty(&osd->o_linger_requests)) {
1037 __remove_osd(osdc, osd);
1042 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1043 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1044 !ceph_con_opened(&osd->o_con)) {
1045 struct ceph_osd_request *req;
1047 dout(" osd addr hasn't changed and connection never opened,"
1048 " letting msgr retry");
1049 /* touch each r_stamp for handle_timeout()'s benfit */
1050 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1051 req->r_stamp = jiffies;
1056 ceph_con_close(&osd->o_con);
1057 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1058 osd->o_incarnation++;
1063 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1065 struct rb_node **p = &osdc->osds.rb_node;
1066 struct rb_node *parent = NULL;
1067 struct ceph_osd *osd = NULL;
1069 dout("__insert_osd %p osd%d\n", new, new->o_osd);
1072 osd = rb_entry(parent, struct ceph_osd, o_node);
1073 if (new->o_osd < osd->o_osd)
1075 else if (new->o_osd > osd->o_osd)
1076 p = &(*p)->rb_right;
1081 rb_link_node(&new->o_node, parent, p);
1082 rb_insert_color(&new->o_node, &osdc->osds);
1085 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1087 struct ceph_osd *osd;
1088 struct rb_node *n = osdc->osds.rb_node;
1091 osd = rb_entry(n, struct ceph_osd, o_node);
1094 else if (o > osd->o_osd)
1102 static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1104 schedule_delayed_work(&osdc->timeout_work,
1105 osdc->client->options->osd_keepalive_timeout * HZ);
1108 static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1110 cancel_delayed_work(&osdc->timeout_work);
1114 * Register request, assign tid. If this is the first request, set up
1115 * the timeout event.
1117 static void __register_request(struct ceph_osd_client *osdc,
1118 struct ceph_osd_request *req)
1120 req->r_tid = ++osdc->last_tid;
1121 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1122 dout("__register_request %p tid %lld\n", req, req->r_tid);
1123 __insert_request(osdc, req);
1124 ceph_osdc_get_request(req);
1125 osdc->num_requests++;
1126 if (osdc->num_requests == 1) {
1127 dout(" first request, scheduling timeout\n");
1128 __schedule_osd_timeout(osdc);
1133 * called under osdc->request_mutex
1135 static void __unregister_request(struct ceph_osd_client *osdc,
1136 struct ceph_osd_request *req)
1138 if (RB_EMPTY_NODE(&req->r_node)) {
1139 dout("__unregister_request %p tid %lld not registered\n",
1144 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1145 rb_erase(&req->r_node, &osdc->requests);
1146 osdc->num_requests--;
1149 /* make sure the original request isn't in flight. */
1150 ceph_msg_revoke(req->r_request);
1152 list_del_init(&req->r_osd_item);
1153 if (list_empty(&req->r_osd->o_requests) &&
1154 list_empty(&req->r_osd->o_linger_requests)) {
1155 dout("moving osd to %p lru\n", req->r_osd);
1156 __move_osd_to_lru(osdc, req->r_osd);
1158 if (list_empty(&req->r_linger_item))
1162 list_del_init(&req->r_req_lru_item);
1163 ceph_osdc_put_request(req);
1165 if (osdc->num_requests == 0) {
1166 dout(" no requests, canceling timeout\n");
1167 __cancel_osd_timeout(osdc);
1172 * Cancel a previously queued request message
1174 static void __cancel_request(struct ceph_osd_request *req)
1176 if (req->r_sent && req->r_osd) {
1177 ceph_msg_revoke(req->r_request);
1182 static void __register_linger_request(struct ceph_osd_client *osdc,
1183 struct ceph_osd_request *req)
1185 dout("__register_linger_request %p\n", req);
1186 ceph_osdc_get_request(req);
1187 list_add_tail(&req->r_linger_item, &osdc->req_linger);
1189 list_add_tail(&req->r_linger_osd,
1190 &req->r_osd->o_linger_requests);
1193 static void __unregister_linger_request(struct ceph_osd_client *osdc,
1194 struct ceph_osd_request *req)
1196 dout("__unregister_linger_request %p\n", req);
1197 list_del_init(&req->r_linger_item);
1199 list_del_init(&req->r_linger_osd);
1201 if (list_empty(&req->r_osd->o_requests) &&
1202 list_empty(&req->r_osd->o_linger_requests)) {
1203 dout("moving osd to %p lru\n", req->r_osd);
1204 __move_osd_to_lru(osdc, req->r_osd);
1206 if (list_empty(&req->r_osd_item))
1209 ceph_osdc_put_request(req);
1212 void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1213 struct ceph_osd_request *req)
1215 mutex_lock(&osdc->request_mutex);
1216 if (req->r_linger) {
1218 __unregister_linger_request(osdc, req);
1220 mutex_unlock(&osdc->request_mutex);
1222 EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1224 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1225 struct ceph_osd_request *req)
1227 if (!req->r_linger) {
1228 dout("set_request_linger %p\n", req);
1232 EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1235 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1236 * (as needed), and set the request r_osd appropriately. If there is
1237 * no up osd, set r_osd to NULL. Move the request to the appropriate list
1238 * (unsent, homeless) or leave on in-flight lru.
1240 * Return 0 if unchanged, 1 if changed, or negative on error.
1242 * Caller should hold map_sem for read and request_mutex.
1244 static int __map_request(struct ceph_osd_client *osdc,
1245 struct ceph_osd_request *req, int force_resend)
1247 struct ceph_pg pgid;
1248 int acting[CEPH_PG_MAX_SIZE];
1249 int o = -1, num = 0;
1252 dout("map_request %p tid %lld\n", req, req->r_tid);
1253 err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
1254 ceph_file_layout_pg_pool(req->r_file_layout));
1256 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1261 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1267 if ((!force_resend &&
1268 req->r_osd && req->r_osd->o_osd == o &&
1269 req->r_sent >= req->r_osd->o_incarnation &&
1270 req->r_num_pg_osds == num &&
1271 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
1272 (req->r_osd == NULL && o == -1))
1273 return 0; /* no change */
1275 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1276 req->r_tid, pgid.pool, pgid.seed, o,
1277 req->r_osd ? req->r_osd->o_osd : -1);
1279 /* record full pg acting set */
1280 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1281 req->r_num_pg_osds = num;
1284 __cancel_request(req);
1285 list_del_init(&req->r_osd_item);
1289 req->r_osd = __lookup_osd(osdc, o);
1290 if (!req->r_osd && o >= 0) {
1292 req->r_osd = create_osd(osdc, o);
1294 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1298 dout("map_request osd %p is osd%d\n", req->r_osd, o);
1299 __insert_osd(osdc, req->r_osd);
1301 ceph_con_open(&req->r_osd->o_con,
1302 CEPH_ENTITY_TYPE_OSD, o,
1303 &osdc->osdmap->osd_addr[o]);
1307 __remove_osd_from_lru(req->r_osd);
1308 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1309 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1311 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1313 err = 1; /* osd or pg changed */
1320 * caller should hold map_sem (for read) and request_mutex
1322 static void __send_request(struct ceph_osd_client *osdc,
1323 struct ceph_osd_request *req)
1327 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1328 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1329 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1331 /* fill in message content that changes each time we send it */
1332 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1333 put_unaligned_le32(req->r_flags, req->r_request_flags);
1334 put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
1335 p = req->r_request_pgid;
1336 ceph_encode_64(&p, req->r_pgid.pool);
1337 ceph_encode_32(&p, req->r_pgid.seed);
1338 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1339 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1340 sizeof(req->r_reassert_version));
1342 req->r_stamp = jiffies;
1343 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1345 ceph_msg_get(req->r_request); /* send consumes a ref */
1347 req->r_sent = req->r_osd->o_incarnation;
1349 ceph_con_send(&req->r_osd->o_con, req->r_request);
1353 * Send any requests in the queue (req_unsent).
1355 static void __send_queued(struct ceph_osd_client *osdc)
1357 struct ceph_osd_request *req, *tmp;
1359 dout("__send_queued\n");
1360 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1361 __send_request(osdc, req);
1365 * Timeout callback, called every N seconds when 1 or more osd
1366 * requests has been active for more than N seconds. When this
1367 * happens, we ping all OSDs with requests who have timed out to
1368 * ensure any communications channel reset is detected. Reset the
1369 * request timeouts another N seconds in the future as we go.
1370 * Reschedule the timeout event another N seconds in future (unless
1371 * there are no open requests).
1373 static void handle_timeout(struct work_struct *work)
1375 struct ceph_osd_client *osdc =
1376 container_of(work, struct ceph_osd_client, timeout_work.work);
1377 struct ceph_osd_request *req;
1378 struct ceph_osd *osd;
1379 unsigned long keepalive =
1380 osdc->client->options->osd_keepalive_timeout * HZ;
1381 struct list_head slow_osds;
1383 down_read(&osdc->map_sem);
1385 ceph_monc_request_next_osdmap(&osdc->client->monc);
1387 mutex_lock(&osdc->request_mutex);
1390 * ping osds that are a bit slow. this ensures that if there
1391 * is a break in the TCP connection we will notice, and reopen
1392 * a connection with that osd (from the fault callback).
1394 INIT_LIST_HEAD(&slow_osds);
1395 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
1396 if (time_before(jiffies, req->r_stamp + keepalive))
1401 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1402 req->r_tid, osd->o_osd);
1403 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1405 while (!list_empty(&slow_osds)) {
1406 osd = list_entry(slow_osds.next, struct ceph_osd,
1408 list_del_init(&osd->o_keepalive_item);
1409 ceph_con_keepalive(&osd->o_con);
1412 __schedule_osd_timeout(osdc);
1413 __send_queued(osdc);
1414 mutex_unlock(&osdc->request_mutex);
1415 up_read(&osdc->map_sem);
1418 static void handle_osds_timeout(struct work_struct *work)
1420 struct ceph_osd_client *osdc =
1421 container_of(work, struct ceph_osd_client,
1422 osds_timeout_work.work);
1423 unsigned long delay =
1424 osdc->client->options->osd_idle_ttl * HZ >> 2;
1426 dout("osds timeout\n");
1427 down_read(&osdc->map_sem);
1428 remove_old_osds(osdc);
1429 up_read(&osdc->map_sem);
1431 schedule_delayed_work(&osdc->osds_timeout_work,
1432 round_jiffies_relative(delay));
1435 static void complete_request(struct ceph_osd_request *req)
1437 complete_all(&req->r_safe_completion); /* fsync waiter */
1441 * handle osd op reply. either call the callback if it is specified,
1442 * or do the completion to wake up the waiting thread.
1444 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1445 struct ceph_connection *con)
1448 struct ceph_osd_request *req;
1451 unsigned int numops;
1452 int payload_len, flags;
1458 u64 reassert_version;
1460 int already_completed;
1464 tid = le64_to_cpu(msg->hdr.tid);
1465 dout("handle_reply %p tid %llu\n", msg, tid);
1467 p = msg->front.iov_base;
1468 end = p + msg->front.iov_len;
1470 ceph_decode_need(&p, end, 4, bad);
1471 object_len = ceph_decode_32(&p);
1472 ceph_decode_need(&p, end, object_len, bad);
1475 err = ceph_decode_pgid(&p, end, &pg);
1479 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1480 flags = ceph_decode_64(&p);
1481 result = ceph_decode_32(&p);
1482 reassert_epoch = ceph_decode_32(&p);
1483 reassert_version = ceph_decode_64(&p);
1484 osdmap_epoch = ceph_decode_32(&p);
1487 mutex_lock(&osdc->request_mutex);
1488 req = __lookup_request(osdc, tid);
1490 dout("handle_reply tid %llu dne\n", tid);
1493 ceph_osdc_get_request(req);
1495 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1498 ceph_decode_need(&p, end, 4, bad_put);
1499 numops = ceph_decode_32(&p);
1500 if (numops > CEPH_OSD_MAX_OP)
1502 if (numops != req->r_num_ops)
1505 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1506 for (i = 0; i < numops; i++) {
1507 struct ceph_osd_op *op = p;
1510 len = le32_to_cpu(op->payload_len);
1511 req->r_reply_op_len[i] = len;
1512 dout(" op %d has %d bytes\n", i, len);
1516 bytes = le32_to_cpu(msg->hdr.data_len);
1517 if (payload_len != bytes) {
1518 pr_warning("sum of op payload lens %d != data_len %d",
1519 payload_len, bytes);
1523 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1524 retry_attempt = ceph_decode_32(&p);
1525 for (i = 0; i < numops; i++)
1526 req->r_reply_op_result[i] = ceph_decode_32(&p);
1528 already_completed = req->r_got_reply;
1530 if (!req->r_got_reply) {
1532 req->r_result = result;
1533 dout("handle_reply result %d bytes %d\n", req->r_result,
1535 if (req->r_result == 0)
1536 req->r_result = bytes;
1538 /* in case this is a write and we need to replay, */
1539 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1540 req->r_reassert_version.version = cpu_to_le64(reassert_version);
1542 req->r_got_reply = 1;
1543 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1544 dout("handle_reply tid %llu dup ack\n", tid);
1545 mutex_unlock(&osdc->request_mutex);
1549 dout("handle_reply tid %llu flags %d\n", tid, flags);
1551 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1552 __register_linger_request(osdc, req);
1554 /* either this is a read, or we got the safe response */
1556 (flags & CEPH_OSD_FLAG_ONDISK) ||
1557 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1558 __unregister_request(osdc, req);
1560 mutex_unlock(&osdc->request_mutex);
1562 if (!already_completed) {
1563 if (req->r_unsafe_callback &&
1564 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1565 req->r_unsafe_callback(req, true);
1566 if (req->r_callback)
1567 req->r_callback(req, msg);
1569 complete_all(&req->r_completion);
1572 if (flags & CEPH_OSD_FLAG_ONDISK) {
1573 if (req->r_unsafe_callback && already_completed)
1574 req->r_unsafe_callback(req, false);
1575 complete_request(req);
1579 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
1580 ceph_osdc_put_request(req);
1584 req->r_result = -EIO;
1585 __unregister_request(osdc, req);
1586 if (req->r_callback)
1587 req->r_callback(req, msg);
1589 complete_all(&req->r_completion);
1590 complete_request(req);
1591 ceph_osdc_put_request(req);
1593 mutex_unlock(&osdc->request_mutex);
1595 pr_err("corrupt osd_op_reply got %d %d\n",
1596 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1600 static void reset_changed_osds(struct ceph_osd_client *osdc)
1602 struct rb_node *p, *n;
1604 for (p = rb_first(&osdc->osds); p; p = n) {
1605 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
1608 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1609 memcmp(&osd->o_con.peer_addr,
1610 ceph_osd_addr(osdc->osdmap,
1612 sizeof(struct ceph_entity_addr)) != 0)
1613 __reset_osd(osdc, osd);
1618 * Requeue requests whose mapping to an OSD has changed. If requests map to
1619 * no osd, request a new map.
1621 * Caller should hold map_sem for read.
1623 static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
1625 struct ceph_osd_request *req, *nreq;
1630 dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
1631 mutex_lock(&osdc->request_mutex);
1632 for (p = rb_first(&osdc->requests); p; ) {
1633 req = rb_entry(p, struct ceph_osd_request, r_node);
1637 * For linger requests that have not yet been
1638 * registered, move them to the linger list; they'll
1639 * be sent to the osd in the loop below. Unregister
1640 * the request before re-registering it as a linger
1641 * request to ensure the __map_request() below
1642 * will decide it needs to be sent.
1644 if (req->r_linger && list_empty(&req->r_linger_item)) {
1645 dout("%p tid %llu restart on osd%d\n",
1647 req->r_osd ? req->r_osd->o_osd : -1);
1648 ceph_osdc_get_request(req);
1649 __unregister_request(osdc, req);
1650 __register_linger_request(osdc, req);
1651 ceph_osdc_put_request(req);
1655 err = __map_request(osdc, req, force_resend);
1657 continue; /* error */
1658 if (req->r_osd == NULL) {
1659 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1660 needmap++; /* request a newer map */
1661 } else if (err > 0) {
1662 if (!req->r_linger) {
1663 dout("%p tid %llu requeued on osd%d\n", req,
1665 req->r_osd ? req->r_osd->o_osd : -1);
1666 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1671 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1673 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1675 err = __map_request(osdc, req, force_resend);
1676 dout("__map_request returned %d\n", err);
1678 continue; /* no change and no osd was specified */
1680 continue; /* hrm! */
1681 if (req->r_osd == NULL) {
1682 dout("tid %llu maps to no valid osd\n", req->r_tid);
1683 needmap++; /* request a newer map */
1687 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1688 req->r_osd ? req->r_osd->o_osd : -1);
1689 __register_request(osdc, req);
1690 __unregister_linger_request(osdc, req);
1692 reset_changed_osds(osdc);
1693 mutex_unlock(&osdc->request_mutex);
1696 dout("%d requests for down osds, need new map\n", needmap);
1697 ceph_monc_request_next_osdmap(&osdc->client->monc);
1703 * Process updated osd map.
1705 * The message contains any number of incremental and full maps, normally
1706 * indicating some sort of topology change in the cluster. Kick requests
1707 * off to different OSDs as needed.
1709 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1711 void *p, *end, *next;
1712 u32 nr_maps, maplen;
1714 struct ceph_osdmap *newmap = NULL, *oldmap;
1716 struct ceph_fsid fsid;
1718 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1719 p = msg->front.iov_base;
1720 end = p + msg->front.iov_len;
1723 ceph_decode_need(&p, end, sizeof(fsid), bad);
1724 ceph_decode_copy(&p, &fsid, sizeof(fsid));
1725 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1728 down_write(&osdc->map_sem);
1730 /* incremental maps */
1731 ceph_decode_32_safe(&p, end, nr_maps, bad);
1732 dout(" %d inc maps\n", nr_maps);
1733 while (nr_maps > 0) {
1734 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1735 epoch = ceph_decode_32(&p);
1736 maplen = ceph_decode_32(&p);
1737 ceph_decode_need(&p, end, maplen, bad);
1739 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1740 dout("applying incremental map %u len %d\n",
1742 newmap = osdmap_apply_incremental(&p, next,
1744 &osdc->client->msgr);
1745 if (IS_ERR(newmap)) {
1746 err = PTR_ERR(newmap);
1750 if (newmap != osdc->osdmap) {
1751 ceph_osdmap_destroy(osdc->osdmap);
1752 osdc->osdmap = newmap;
1754 kick_requests(osdc, 0);
1756 dout("ignoring incremental map %u len %d\n",
1766 ceph_decode_32_safe(&p, end, nr_maps, bad);
1767 dout(" %d full maps\n", nr_maps);
1769 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1770 epoch = ceph_decode_32(&p);
1771 maplen = ceph_decode_32(&p);
1772 ceph_decode_need(&p, end, maplen, bad);
1774 dout("skipping non-latest full map %u len %d\n",
1776 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1777 dout("skipping full map %u len %d, "
1778 "older than our %u\n", epoch, maplen,
1779 osdc->osdmap->epoch);
1781 int skipped_map = 0;
1783 dout("taking full map %u len %d\n", epoch, maplen);
1784 newmap = osdmap_decode(&p, p+maplen);
1785 if (IS_ERR(newmap)) {
1786 err = PTR_ERR(newmap);
1790 oldmap = osdc->osdmap;
1791 osdc->osdmap = newmap;
1793 if (oldmap->epoch + 1 < newmap->epoch)
1795 ceph_osdmap_destroy(oldmap);
1797 kick_requests(osdc, skipped_map);
1806 downgrade_write(&osdc->map_sem);
1807 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1810 * subscribe to subsequent osdmap updates if full to ensure
1811 * we find out when we are no longer full and stop returning
1814 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
1815 ceph_monc_request_next_osdmap(&osdc->client->monc);
1817 mutex_lock(&osdc->request_mutex);
1818 __send_queued(osdc);
1819 mutex_unlock(&osdc->request_mutex);
1820 up_read(&osdc->map_sem);
1821 wake_up_all(&osdc->client->auth_wq);
1825 pr_err("osdc handle_map corrupt msg\n");
1827 up_write(&osdc->map_sem);
1832 * watch/notify callback event infrastructure
1834 * These callbacks are used both for watch and notify operations.
1836 static void __release_event(struct kref *kref)
1838 struct ceph_osd_event *event =
1839 container_of(kref, struct ceph_osd_event, kref);
1841 dout("__release_event %p\n", event);
1845 static void get_event(struct ceph_osd_event *event)
1847 kref_get(&event->kref);
1850 void ceph_osdc_put_event(struct ceph_osd_event *event)
1852 kref_put(&event->kref, __release_event);
1854 EXPORT_SYMBOL(ceph_osdc_put_event);
1856 static void __insert_event(struct ceph_osd_client *osdc,
1857 struct ceph_osd_event *new)
1859 struct rb_node **p = &osdc->event_tree.rb_node;
1860 struct rb_node *parent = NULL;
1861 struct ceph_osd_event *event = NULL;
1865 event = rb_entry(parent, struct ceph_osd_event, node);
1866 if (new->cookie < event->cookie)
1868 else if (new->cookie > event->cookie)
1869 p = &(*p)->rb_right;
1874 rb_link_node(&new->node, parent, p);
1875 rb_insert_color(&new->node, &osdc->event_tree);
1878 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
1881 struct rb_node **p = &osdc->event_tree.rb_node;
1882 struct rb_node *parent = NULL;
1883 struct ceph_osd_event *event = NULL;
1887 event = rb_entry(parent, struct ceph_osd_event, node);
1888 if (cookie < event->cookie)
1890 else if (cookie > event->cookie)
1891 p = &(*p)->rb_right;
1898 static void __remove_event(struct ceph_osd_event *event)
1900 struct ceph_osd_client *osdc = event->osdc;
1902 if (!RB_EMPTY_NODE(&event->node)) {
1903 dout("__remove_event removed %p\n", event);
1904 rb_erase(&event->node, &osdc->event_tree);
1905 ceph_osdc_put_event(event);
1907 dout("__remove_event didn't remove %p\n", event);
1911 int ceph_osdc_create_event(struct ceph_osd_client *osdc,
1912 void (*event_cb)(u64, u64, u8, void *),
1913 void *data, struct ceph_osd_event **pevent)
1915 struct ceph_osd_event *event;
1917 event = kmalloc(sizeof(*event), GFP_NOIO);
1921 dout("create_event %p\n", event);
1922 event->cb = event_cb;
1923 event->one_shot = 0;
1926 INIT_LIST_HEAD(&event->osd_node);
1927 RB_CLEAR_NODE(&event->node);
1928 kref_init(&event->kref); /* one ref for us */
1929 kref_get(&event->kref); /* one ref for the caller */
1931 spin_lock(&osdc->event_lock);
1932 event->cookie = ++osdc->event_count;
1933 __insert_event(osdc, event);
1934 spin_unlock(&osdc->event_lock);
1939 EXPORT_SYMBOL(ceph_osdc_create_event);
1941 void ceph_osdc_cancel_event(struct ceph_osd_event *event)
1943 struct ceph_osd_client *osdc = event->osdc;
1945 dout("cancel_event %p\n", event);
1946 spin_lock(&osdc->event_lock);
1947 __remove_event(event);
1948 spin_unlock(&osdc->event_lock);
1949 ceph_osdc_put_event(event); /* caller's */
1951 EXPORT_SYMBOL(ceph_osdc_cancel_event);
1954 static void do_event_work(struct work_struct *work)
1956 struct ceph_osd_event_work *event_work =
1957 container_of(work, struct ceph_osd_event_work, work);
1958 struct ceph_osd_event *event = event_work->event;
1959 u64 ver = event_work->ver;
1960 u64 notify_id = event_work->notify_id;
1961 u8 opcode = event_work->opcode;
1963 dout("do_event_work completing %p\n", event);
1964 event->cb(ver, notify_id, opcode, event->data);
1965 dout("do_event_work completed %p\n", event);
1966 ceph_osdc_put_event(event);
1972 * Process osd watch notifications
1974 static void handle_watch_notify(struct ceph_osd_client *osdc,
1975 struct ceph_msg *msg)
1979 u64 cookie, ver, notify_id;
1981 struct ceph_osd_event *event;
1982 struct ceph_osd_event_work *event_work;
1984 p = msg->front.iov_base;
1985 end = p + msg->front.iov_len;
1987 ceph_decode_8_safe(&p, end, proto_ver, bad);
1988 ceph_decode_8_safe(&p, end, opcode, bad);
1989 ceph_decode_64_safe(&p, end, cookie, bad);
1990 ceph_decode_64_safe(&p, end, ver, bad);
1991 ceph_decode_64_safe(&p, end, notify_id, bad);
1993 spin_lock(&osdc->event_lock);
1994 event = __find_event(osdc, cookie);
1996 BUG_ON(event->one_shot);
1999 spin_unlock(&osdc->event_lock);
2000 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2001 cookie, ver, event);
2003 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
2005 dout("ERROR: could not allocate event_work\n");
2008 INIT_WORK(&event_work->work, do_event_work);
2009 event_work->event = event;
2010 event_work->ver = ver;
2011 event_work->notify_id = notify_id;
2012 event_work->opcode = opcode;
2013 if (!queue_work(osdc->notify_wq, &event_work->work)) {
2014 dout("WARNING: failed to queue notify event work\n");
2022 ceph_osdc_put_event(event);
2026 pr_err("osdc handle_watch_notify corrupt msg\n");
2031 * build new request AND message
2034 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2035 struct ceph_snap_context *snapc, u64 snap_id,
2036 struct timespec *mtime)
2038 struct ceph_msg *msg = req->r_request;
2041 int flags = req->r_flags;
2045 req->r_snapid = snap_id;
2046 req->r_snapc = ceph_get_snap_context(snapc);
2048 /* encode request */
2049 msg->hdr.version = cpu_to_le16(4);
2051 p = msg->front.iov_base;
2052 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2053 req->r_request_osdmap_epoch = p;
2055 req->r_request_flags = p;
2057 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2058 ceph_encode_timespec(p, mtime);
2059 p += sizeof(struct ceph_timespec);
2060 req->r_request_reassert_version = p;
2061 p += sizeof(struct ceph_eversion); /* will get filled in */
2064 ceph_encode_8(&p, 4);
2065 ceph_encode_8(&p, 4);
2066 ceph_encode_32(&p, 8 + 4 + 4);
2067 req->r_request_pool = p;
2069 ceph_encode_32(&p, -1); /* preferred */
2070 ceph_encode_32(&p, 0); /* key len */
2072 ceph_encode_8(&p, 1);
2073 req->r_request_pgid = p;
2075 ceph_encode_32(&p, -1); /* preferred */
2078 ceph_encode_32(&p, req->r_oid_len);
2079 memcpy(p, req->r_oid, req->r_oid_len);
2080 dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
2081 p += req->r_oid_len;
2083 /* ops--can imply data */
2084 ceph_encode_16(&p, (u16)req->r_num_ops);
2086 for (i = 0; i < req->r_num_ops; i++) {
2087 data_len += osd_req_encode_op(req, p, i);
2088 p += sizeof(struct ceph_osd_op);
2092 ceph_encode_64(&p, req->r_snapid);
2093 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2094 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2096 for (i = 0; i < snapc->num_snaps; i++) {
2097 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2101 req->r_request_attempts = p;
2105 if (flags & CEPH_OSD_FLAG_WRITE) {
2109 * The header "data_off" is a hint to the receiver
2110 * allowing it to align received data into its
2111 * buffers such that there's no need to re-copy
2112 * it before writing it to disk (direct I/O).
2114 data_off = (u16) (off & 0xffff);
2115 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2117 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2119 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2120 msg_size = p - msg->front.iov_base;
2121 msg->front.iov_len = msg_size;
2122 msg->hdr.front_len = cpu_to_le32(msg_size);
2124 dout("build_request msg_size was %d\n", (int)msg_size);
2126 EXPORT_SYMBOL(ceph_osdc_build_request);
2129 * Register request, send initial attempt.
2131 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2132 struct ceph_osd_request *req,
2137 down_read(&osdc->map_sem);
2138 mutex_lock(&osdc->request_mutex);
2139 __register_request(osdc, req);
2141 req->r_got_reply = 0;
2142 rc = __map_request(osdc, req, 0);
2145 dout("osdc_start_request failed map, "
2146 " will retry %lld\n", req->r_tid);
2149 __unregister_request(osdc, req);
2153 if (req->r_osd == NULL) {
2154 dout("send_request %p no up osds in pg\n", req);
2155 ceph_monc_request_next_osdmap(&osdc->client->monc);
2157 __send_queued(osdc);
2161 mutex_unlock(&osdc->request_mutex);
2162 up_read(&osdc->map_sem);
2165 EXPORT_SYMBOL(ceph_osdc_start_request);
2168 * wait for a request to complete
2170 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2171 struct ceph_osd_request *req)
2175 rc = wait_for_completion_interruptible(&req->r_completion);
2177 mutex_lock(&osdc->request_mutex);
2178 __cancel_request(req);
2179 __unregister_request(osdc, req);
2180 mutex_unlock(&osdc->request_mutex);
2181 complete_request(req);
2182 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
2186 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2187 return req->r_result;
2189 EXPORT_SYMBOL(ceph_osdc_wait_request);
2192 * sync - wait for all in-flight requests to flush. avoid starvation.
2194 void ceph_osdc_sync(struct ceph_osd_client *osdc)
2196 struct ceph_osd_request *req;
2197 u64 last_tid, next_tid = 0;
2199 mutex_lock(&osdc->request_mutex);
2200 last_tid = osdc->last_tid;
2202 req = __lookup_request_ge(osdc, next_tid);
2205 if (req->r_tid > last_tid)
2208 next_tid = req->r_tid + 1;
2209 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2212 ceph_osdc_get_request(req);
2213 mutex_unlock(&osdc->request_mutex);
2214 dout("sync waiting on tid %llu (last is %llu)\n",
2215 req->r_tid, last_tid);
2216 wait_for_completion(&req->r_safe_completion);
2217 mutex_lock(&osdc->request_mutex);
2218 ceph_osdc_put_request(req);
2220 mutex_unlock(&osdc->request_mutex);
2221 dout("sync done (thru tid %llu)\n", last_tid);
2223 EXPORT_SYMBOL(ceph_osdc_sync);
2226 * Call all pending notify callbacks - for use after a watch is
2227 * unregistered, to make sure no more callbacks for it will be invoked
2229 extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2231 flush_workqueue(osdc->notify_wq);
2233 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2239 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2244 osdc->client = client;
2245 osdc->osdmap = NULL;
2246 init_rwsem(&osdc->map_sem);
2247 init_completion(&osdc->map_waiters);
2248 osdc->last_requested_map = 0;
2249 mutex_init(&osdc->request_mutex);
2251 osdc->osds = RB_ROOT;
2252 INIT_LIST_HEAD(&osdc->osd_lru);
2253 osdc->requests = RB_ROOT;
2254 INIT_LIST_HEAD(&osdc->req_lru);
2255 INIT_LIST_HEAD(&osdc->req_unsent);
2256 INIT_LIST_HEAD(&osdc->req_notarget);
2257 INIT_LIST_HEAD(&osdc->req_linger);
2258 osdc->num_requests = 0;
2259 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2260 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2261 spin_lock_init(&osdc->event_lock);
2262 osdc->event_tree = RB_ROOT;
2263 osdc->event_count = 0;
2265 schedule_delayed_work(&osdc->osds_timeout_work,
2266 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
2269 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2270 sizeof(struct ceph_osd_request));
2271 if (!osdc->req_mempool)
2274 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2275 OSD_OP_FRONT_LEN, 10, true,
2279 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2280 OSD_OPREPLY_FRONT_LEN, 10, true,
2286 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2287 if (!osdc->notify_wq)
2292 ceph_msgpool_destroy(&osdc->msgpool_op);
2294 mempool_destroy(osdc->req_mempool);
2299 void ceph_osdc_stop(struct ceph_osd_client *osdc)
2301 flush_workqueue(osdc->notify_wq);
2302 destroy_workqueue(osdc->notify_wq);
2303 cancel_delayed_work_sync(&osdc->timeout_work);
2304 cancel_delayed_work_sync(&osdc->osds_timeout_work);
2306 ceph_osdmap_destroy(osdc->osdmap);
2307 osdc->osdmap = NULL;
2309 remove_all_osds(osdc);
2310 mempool_destroy(osdc->req_mempool);
2311 ceph_msgpool_destroy(&osdc->msgpool_op);
2312 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2316 * Read some contiguous pages. If we cross a stripe boundary, shorten
2317 * *plen. Return number of bytes read, or error.
2319 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2320 struct ceph_vino vino, struct ceph_file_layout *layout,
2322 u32 truncate_seq, u64 truncate_size,
2323 struct page **pages, int num_pages, int page_align)
2325 struct ceph_osd_request *req;
2328 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2329 vino.snap, off, *plen);
2330 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
2331 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2332 NULL, truncate_seq, truncate_size,
2335 return PTR_ERR(req);
2337 /* it may be a short read due to an object boundary */
2339 osd_req_op_extent_osd_data_pages(req, 0,
2340 pages, *plen, page_align, false, false);
2342 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
2343 off, *plen, *plen, page_align);
2345 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2347 rc = ceph_osdc_start_request(osdc, req, false);
2349 rc = ceph_osdc_wait_request(osdc, req);
2351 ceph_osdc_put_request(req);
2352 dout("readpages result %d\n", rc);
2355 EXPORT_SYMBOL(ceph_osdc_readpages);
2358 * do a synchronous write on N pages
2360 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2361 struct ceph_file_layout *layout,
2362 struct ceph_snap_context *snapc,
2364 u32 truncate_seq, u64 truncate_size,
2365 struct timespec *mtime,
2366 struct page **pages, int num_pages)
2368 struct ceph_osd_request *req;
2370 int page_align = off & ~PAGE_MASK;
2372 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
2373 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
2375 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2376 snapc, truncate_seq, truncate_size,
2379 return PTR_ERR(req);
2381 /* it may be a short write due to an object boundary */
2382 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2384 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
2386 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2388 rc = ceph_osdc_start_request(osdc, req, true);
2390 rc = ceph_osdc_wait_request(osdc, req);
2392 ceph_osdc_put_request(req);
2395 dout("writepages result %d\n", rc);
2398 EXPORT_SYMBOL(ceph_osdc_writepages);
2400 int ceph_osdc_setup(void)
2402 BUG_ON(ceph_osd_request_cache);
2403 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2404 sizeof (struct ceph_osd_request),
2405 __alignof__(struct ceph_osd_request),
2408 return ceph_osd_request_cache ? 0 : -ENOMEM;
2410 EXPORT_SYMBOL(ceph_osdc_setup);
2412 void ceph_osdc_cleanup(void)
2414 BUG_ON(!ceph_osd_request_cache);
2415 kmem_cache_destroy(ceph_osd_request_cache);
2416 ceph_osd_request_cache = NULL;
2418 EXPORT_SYMBOL(ceph_osdc_cleanup);
2421 * handle incoming message
2423 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2425 struct ceph_osd *osd = con->private;
2426 struct ceph_osd_client *osdc;
2427 int type = le16_to_cpu(msg->hdr.type);
2434 case CEPH_MSG_OSD_MAP:
2435 ceph_osdc_handle_map(osdc, msg);
2437 case CEPH_MSG_OSD_OPREPLY:
2438 handle_reply(osdc, msg, con);
2440 case CEPH_MSG_WATCH_NOTIFY:
2441 handle_watch_notify(osdc, msg);
2445 pr_err("received unknown message type %d %s\n", type,
2446 ceph_msg_type_name(type));
2453 * lookup and return message for incoming reply. set up reply message
2456 static struct ceph_msg *get_reply(struct ceph_connection *con,
2457 struct ceph_msg_header *hdr,
2460 struct ceph_osd *osd = con->private;
2461 struct ceph_osd_client *osdc = osd->o_osdc;
2463 struct ceph_osd_request *req;
2464 int front = le32_to_cpu(hdr->front_len);
2465 int data_len = le32_to_cpu(hdr->data_len);
2468 tid = le64_to_cpu(hdr->tid);
2469 mutex_lock(&osdc->request_mutex);
2470 req = __lookup_request(osdc, tid);
2474 dout("get_reply unknown tid %llu from osd%d\n", tid,
2479 if (req->r_reply->con)
2480 dout("%s revoking msg %p from old con %p\n", __func__,
2481 req->r_reply, req->r_reply->con);
2482 ceph_msg_revoke_incoming(req->r_reply);
2484 if (front > req->r_reply->front.iov_len) {
2485 pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
2486 front, (int)req->r_reply->front.iov_len,
2487 (unsigned int)con->peer_name.type,
2488 le64_to_cpu(con->peer_name.num));
2489 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
2492 ceph_msg_put(req->r_reply);
2495 m = ceph_msg_get(req->r_reply);
2498 struct ceph_osd_data *osd_data;
2501 * XXX This is assuming there is only one op containing
2502 * XXX page data. Probably OK for reads, but this
2503 * XXX ought to be done more generally.
2505 osd_data = osd_req_op_extent_osd_data(req, 0);
2506 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
2507 if (osd_data->pages &&
2508 unlikely(osd_data->length < data_len)) {
2510 pr_warning("tid %lld reply has %d bytes "
2511 "we had only %llu bytes ready\n",
2512 tid, data_len, osd_data->length);
2521 dout("get_reply tid %lld %p\n", tid, m);
2524 mutex_unlock(&osdc->request_mutex);
2529 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2530 struct ceph_msg_header *hdr,
2533 struct ceph_osd *osd = con->private;
2534 int type = le16_to_cpu(hdr->type);
2535 int front = le32_to_cpu(hdr->front_len);
2539 case CEPH_MSG_OSD_MAP:
2540 case CEPH_MSG_WATCH_NOTIFY:
2541 return ceph_msg_new(type, front, GFP_NOFS, false);
2542 case CEPH_MSG_OSD_OPREPLY:
2543 return get_reply(con, hdr, skip);
2545 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2553 * Wrappers to refcount containing ceph_osd struct
2555 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2557 struct ceph_osd *osd = con->private;
2563 static void put_osd_con(struct ceph_connection *con)
2565 struct ceph_osd *osd = con->private;
2573 * Note: returned pointer is the address of a structure that's
2574 * managed separately. Caller must *not* attempt to free it.
2576 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
2577 int *proto, int force_new)
2579 struct ceph_osd *o = con->private;
2580 struct ceph_osd_client *osdc = o->o_osdc;
2581 struct ceph_auth_client *ac = osdc->client->monc.auth;
2582 struct ceph_auth_handshake *auth = &o->o_auth;
2584 if (force_new && auth->authorizer) {
2585 ceph_auth_destroy_authorizer(ac, auth->authorizer);
2586 auth->authorizer = NULL;
2588 if (!auth->authorizer) {
2589 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2592 return ERR_PTR(ret);
2594 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2597 return ERR_PTR(ret);
2599 *proto = ac->protocol;
2605 static int verify_authorizer_reply(struct ceph_connection *con, int len)
2607 struct ceph_osd *o = con->private;
2608 struct ceph_osd_client *osdc = o->o_osdc;
2609 struct ceph_auth_client *ac = osdc->client->monc.auth;
2611 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2614 static int invalidate_authorizer(struct ceph_connection *con)
2616 struct ceph_osd *o = con->private;
2617 struct ceph_osd_client *osdc = o->o_osdc;
2618 struct ceph_auth_client *ac = osdc->client->monc.auth;
2620 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2621 return ceph_monc_validate_auth(&osdc->client->monc);
2624 static const struct ceph_connection_operations osd_con_ops = {
2627 .dispatch = dispatch,
2628 .get_authorizer = get_authorizer,
2629 .verify_authorizer_reply = verify_authorizer_reply,
2630 .invalidate_authorizer = invalidate_authorizer,
2631 .alloc_msg = alloc_msg,