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);
508 op->extent.offset = offset;
509 op->extent.length = length;
510 op->extent.truncate_size = truncate_size;
511 op->extent.truncate_seq = truncate_seq;
512 if (opcode == CEPH_OSD_OP_WRITE)
513 payload_len += length;
515 op->payload_len = payload_len;
517 EXPORT_SYMBOL(osd_req_op_extent_init);
519 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
520 unsigned int which, u64 length)
522 struct ceph_osd_req_op *op;
525 BUG_ON(which >= osd_req->r_num_ops);
526 op = &osd_req->r_ops[which];
527 previous = op->extent.length;
529 if (length == previous)
530 return; /* Nothing to do */
531 BUG_ON(length > previous);
533 op->extent.length = length;
534 op->payload_len -= previous - length;
536 EXPORT_SYMBOL(osd_req_op_extent_update);
538 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
539 u16 opcode, const char *class, const char *method)
541 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
542 struct ceph_pagelist *pagelist;
543 size_t payload_len = 0;
546 BUG_ON(opcode != CEPH_OSD_OP_CALL);
548 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
550 ceph_pagelist_init(pagelist);
552 op->cls.class_name = class;
553 size = strlen(class);
554 BUG_ON(size > (size_t) U8_MAX);
555 op->cls.class_len = size;
556 ceph_pagelist_append(pagelist, class, size);
559 op->cls.method_name = method;
560 size = strlen(method);
561 BUG_ON(size > (size_t) U8_MAX);
562 op->cls.method_len = size;
563 ceph_pagelist_append(pagelist, method, size);
566 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
568 op->cls.argc = 0; /* currently unused */
570 op->payload_len = payload_len;
572 EXPORT_SYMBOL(osd_req_op_cls_init);
574 void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
575 unsigned int which, u16 opcode,
576 u64 cookie, u64 version, int flag)
578 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
580 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
582 op->watch.cookie = cookie;
583 op->watch.ver = version;
584 if (opcode == CEPH_OSD_OP_WATCH && flag)
585 op->watch.flag = (u8)1;
587 EXPORT_SYMBOL(osd_req_op_watch_init);
589 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
590 struct ceph_osd_data *osd_data)
592 u64 length = ceph_osd_data_length(osd_data);
594 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
595 BUG_ON(length > (u64) SIZE_MAX);
597 ceph_msg_data_add_pages(msg, osd_data->pages,
598 length, osd_data->alignment);
599 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
601 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
603 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
604 ceph_msg_data_add_bio(msg, osd_data->bio, length);
607 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
611 static u64 osd_req_encode_op(struct ceph_osd_request *req,
612 struct ceph_osd_op *dst, unsigned int which)
614 struct ceph_osd_req_op *src;
615 struct ceph_osd_data *osd_data;
616 u64 request_data_len = 0;
619 BUG_ON(which >= req->r_num_ops);
620 src = &req->r_ops[which];
621 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
622 pr_err("unrecognized osd opcode %d\n", src->op);
628 case CEPH_OSD_OP_STAT:
629 osd_data = &src->raw_data_in;
630 ceph_osdc_msg_data_add(req->r_reply, osd_data);
632 case CEPH_OSD_OP_READ:
633 case CEPH_OSD_OP_WRITE:
634 if (src->op == CEPH_OSD_OP_WRITE)
635 request_data_len = src->extent.length;
636 dst->extent.offset = cpu_to_le64(src->extent.offset);
637 dst->extent.length = cpu_to_le64(src->extent.length);
638 dst->extent.truncate_size =
639 cpu_to_le64(src->extent.truncate_size);
640 dst->extent.truncate_seq =
641 cpu_to_le32(src->extent.truncate_seq);
642 osd_data = &src->extent.osd_data;
643 if (src->op == CEPH_OSD_OP_WRITE)
644 ceph_osdc_msg_data_add(req->r_request, osd_data);
646 ceph_osdc_msg_data_add(req->r_reply, osd_data);
648 case CEPH_OSD_OP_CALL:
649 dst->cls.class_len = src->cls.class_len;
650 dst->cls.method_len = src->cls.method_len;
651 osd_data = &src->cls.request_info;
652 ceph_osdc_msg_data_add(req->r_request, osd_data);
653 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
654 request_data_len = osd_data->pagelist->length;
656 osd_data = &src->cls.request_data;
657 data_length = ceph_osd_data_length(osd_data);
659 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
660 dst->cls.indata_len = cpu_to_le32(data_length);
661 ceph_osdc_msg_data_add(req->r_request, osd_data);
662 src->payload_len += data_length;
663 request_data_len += data_length;
665 osd_data = &src->cls.response_data;
666 ceph_osdc_msg_data_add(req->r_reply, osd_data);
668 case CEPH_OSD_OP_STARTSYNC:
670 case CEPH_OSD_OP_NOTIFY_ACK:
671 case CEPH_OSD_OP_WATCH:
672 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
673 dst->watch.ver = cpu_to_le64(src->watch.ver);
674 dst->watch.flag = src->watch.flag;
677 pr_err("unsupported osd opcode %s\n",
678 ceph_osd_op_name(src->op));
683 dst->op = cpu_to_le16(src->op);
684 dst->payload_len = cpu_to_le32(src->payload_len);
686 return request_data_len;
690 * build new request AND message, calculate layout, and adjust file
693 * if the file was recently truncated, we include information about its
694 * old and new size so that the object can be updated appropriately. (we
695 * avoid synchronously deleting truncated objects because it's slow.)
697 * if @do_sync, include a 'startsync' command so that the osd will flush
700 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
701 struct ceph_file_layout *layout,
702 struct ceph_vino vino,
703 u64 off, u64 *plen, int num_ops,
704 int opcode, int flags,
705 struct ceph_snap_context *snapc,
710 struct ceph_osd_request *req;
718 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
720 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
723 return ERR_PTR(-ENOMEM);
725 req->r_flags = flags;
727 /* calculate max write size */
728 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
730 ceph_osdc_put_request(req);
734 object_size = le32_to_cpu(layout->fl_object_size);
735 object_base = off - objoff;
736 if (truncate_size <= object_base) {
739 truncate_size -= object_base;
740 if (truncate_size > object_size)
741 truncate_size = object_size;
744 osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
745 truncate_size, truncate_seq);
748 * A second op in the ops array means the caller wants to
749 * also issue a include a 'startsync' command so that the
750 * osd will flush data quickly.
753 osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
755 req->r_file_layout = *layout; /* keep a copy */
757 snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
759 req->r_oid_len = strlen(req->r_oid);
763 EXPORT_SYMBOL(ceph_osdc_new_request);
766 * We keep osd requests in an rbtree, sorted by ->r_tid.
768 static void __insert_request(struct ceph_osd_client *osdc,
769 struct ceph_osd_request *new)
771 struct rb_node **p = &osdc->requests.rb_node;
772 struct rb_node *parent = NULL;
773 struct ceph_osd_request *req = NULL;
777 req = rb_entry(parent, struct ceph_osd_request, r_node);
778 if (new->r_tid < req->r_tid)
780 else if (new->r_tid > req->r_tid)
786 rb_link_node(&new->r_node, parent, p);
787 rb_insert_color(&new->r_node, &osdc->requests);
790 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
793 struct ceph_osd_request *req;
794 struct rb_node *n = osdc->requests.rb_node;
797 req = rb_entry(n, struct ceph_osd_request, r_node);
798 if (tid < req->r_tid)
800 else if (tid > req->r_tid)
808 static struct ceph_osd_request *
809 __lookup_request_ge(struct ceph_osd_client *osdc,
812 struct ceph_osd_request *req;
813 struct rb_node *n = osdc->requests.rb_node;
816 req = rb_entry(n, struct ceph_osd_request, r_node);
817 if (tid < req->r_tid) {
821 } else if (tid > req->r_tid) {
831 * Resubmit requests pending on the given osd.
833 static void __kick_osd_requests(struct ceph_osd_client *osdc,
834 struct ceph_osd *osd)
836 struct ceph_osd_request *req, *nreq;
840 dout("__kick_osd_requests osd%d\n", osd->o_osd);
841 err = __reset_osd(osdc, osd);
845 * Build up a list of requests to resend by traversing the
846 * osd's list of requests. Requests for a given object are
847 * sent in tid order, and that is also the order they're
848 * kept on this list. Therefore all requests that are in
849 * flight will be found first, followed by all requests that
850 * have not yet been sent. And to resend requests while
851 * preserving this order we will want to put any sent
852 * requests back on the front of the osd client's unsent
855 * So we build a separate ordered list of already-sent
856 * requests for the affected osd and splice it onto the
857 * front of the osd client's unsent list. Once we've seen a
858 * request that has not yet been sent we're done. Those
859 * requests are already sitting right where they belong.
861 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
864 list_move_tail(&req->r_req_lru_item, &resend);
865 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
868 req->r_flags |= CEPH_OSD_FLAG_RETRY;
870 list_splice(&resend, &osdc->req_unsent);
873 * Linger requests are re-registered before sending, which
874 * sets up a new tid for each. We add them to the unsent
875 * list at the end to keep things in tid order.
877 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
880 * reregister request prior to unregistering linger so
881 * that r_osd is preserved.
883 BUG_ON(!list_empty(&req->r_req_lru_item));
884 __register_request(osdc, req);
885 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
886 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
887 __unregister_linger_request(osdc, req);
888 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
894 * If the osd connection drops, we need to resubmit all requests.
896 static void osd_reset(struct ceph_connection *con)
898 struct ceph_osd *osd = con->private;
899 struct ceph_osd_client *osdc;
903 dout("osd_reset osd%d\n", osd->o_osd);
905 down_read(&osdc->map_sem);
906 mutex_lock(&osdc->request_mutex);
907 __kick_osd_requests(osdc, osd);
909 mutex_unlock(&osdc->request_mutex);
910 up_read(&osdc->map_sem);
914 * Track open sessions with osds.
916 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
918 struct ceph_osd *osd;
920 osd = kzalloc(sizeof(*osd), GFP_NOFS);
924 atomic_set(&osd->o_ref, 1);
927 RB_CLEAR_NODE(&osd->o_node);
928 INIT_LIST_HEAD(&osd->o_requests);
929 INIT_LIST_HEAD(&osd->o_linger_requests);
930 INIT_LIST_HEAD(&osd->o_osd_lru);
931 osd->o_incarnation = 1;
933 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
935 INIT_LIST_HEAD(&osd->o_keepalive_item);
939 static struct ceph_osd *get_osd(struct ceph_osd *osd)
941 if (atomic_inc_not_zero(&osd->o_ref)) {
942 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
943 atomic_read(&osd->o_ref));
946 dout("get_osd %p FAIL\n", osd);
951 static void put_osd(struct ceph_osd *osd)
953 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
954 atomic_read(&osd->o_ref) - 1);
955 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
956 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
958 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
964 * remove an osd from our map
966 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
968 dout("__remove_osd %p\n", osd);
969 BUG_ON(!list_empty(&osd->o_requests));
970 rb_erase(&osd->o_node, &osdc->osds);
971 list_del_init(&osd->o_osd_lru);
972 ceph_con_close(&osd->o_con);
976 static void remove_all_osds(struct ceph_osd_client *osdc)
978 dout("%s %p\n", __func__, osdc);
979 mutex_lock(&osdc->request_mutex);
980 while (!RB_EMPTY_ROOT(&osdc->osds)) {
981 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
982 struct ceph_osd, o_node);
983 __remove_osd(osdc, osd);
985 mutex_unlock(&osdc->request_mutex);
988 static void __move_osd_to_lru(struct ceph_osd_client *osdc,
989 struct ceph_osd *osd)
991 dout("__move_osd_to_lru %p\n", osd);
992 BUG_ON(!list_empty(&osd->o_osd_lru));
993 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
994 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
997 static void __remove_osd_from_lru(struct ceph_osd *osd)
999 dout("__remove_osd_from_lru %p\n", osd);
1000 if (!list_empty(&osd->o_osd_lru))
1001 list_del_init(&osd->o_osd_lru);
1004 static void remove_old_osds(struct ceph_osd_client *osdc)
1006 struct ceph_osd *osd, *nosd;
1008 dout("__remove_old_osds %p\n", osdc);
1009 mutex_lock(&osdc->request_mutex);
1010 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1011 if (time_before(jiffies, osd->lru_ttl))
1013 __remove_osd(osdc, osd);
1015 mutex_unlock(&osdc->request_mutex);
1021 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1023 struct ceph_entity_addr *peer_addr;
1025 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1026 if (list_empty(&osd->o_requests) &&
1027 list_empty(&osd->o_linger_requests)) {
1028 __remove_osd(osdc, osd);
1033 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1034 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1035 !ceph_con_opened(&osd->o_con)) {
1036 struct ceph_osd_request *req;
1038 dout(" osd addr hasn't changed and connection never opened,"
1039 " letting msgr retry");
1040 /* touch each r_stamp for handle_timeout()'s benfit */
1041 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1042 req->r_stamp = jiffies;
1047 ceph_con_close(&osd->o_con);
1048 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1049 osd->o_incarnation++;
1054 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1056 struct rb_node **p = &osdc->osds.rb_node;
1057 struct rb_node *parent = NULL;
1058 struct ceph_osd *osd = NULL;
1060 dout("__insert_osd %p osd%d\n", new, new->o_osd);
1063 osd = rb_entry(parent, struct ceph_osd, o_node);
1064 if (new->o_osd < osd->o_osd)
1066 else if (new->o_osd > osd->o_osd)
1067 p = &(*p)->rb_right;
1072 rb_link_node(&new->o_node, parent, p);
1073 rb_insert_color(&new->o_node, &osdc->osds);
1076 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1078 struct ceph_osd *osd;
1079 struct rb_node *n = osdc->osds.rb_node;
1082 osd = rb_entry(n, struct ceph_osd, o_node);
1085 else if (o > osd->o_osd)
1093 static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1095 schedule_delayed_work(&osdc->timeout_work,
1096 osdc->client->options->osd_keepalive_timeout * HZ);
1099 static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1101 cancel_delayed_work(&osdc->timeout_work);
1105 * Register request, assign tid. If this is the first request, set up
1106 * the timeout event.
1108 static void __register_request(struct ceph_osd_client *osdc,
1109 struct ceph_osd_request *req)
1111 req->r_tid = ++osdc->last_tid;
1112 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1113 dout("__register_request %p tid %lld\n", req, req->r_tid);
1114 __insert_request(osdc, req);
1115 ceph_osdc_get_request(req);
1116 osdc->num_requests++;
1117 if (osdc->num_requests == 1) {
1118 dout(" first request, scheduling timeout\n");
1119 __schedule_osd_timeout(osdc);
1124 * called under osdc->request_mutex
1126 static void __unregister_request(struct ceph_osd_client *osdc,
1127 struct ceph_osd_request *req)
1129 if (RB_EMPTY_NODE(&req->r_node)) {
1130 dout("__unregister_request %p tid %lld not registered\n",
1135 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1136 rb_erase(&req->r_node, &osdc->requests);
1137 osdc->num_requests--;
1140 /* make sure the original request isn't in flight. */
1141 ceph_msg_revoke(req->r_request);
1143 list_del_init(&req->r_osd_item);
1144 if (list_empty(&req->r_osd->o_requests) &&
1145 list_empty(&req->r_osd->o_linger_requests)) {
1146 dout("moving osd to %p lru\n", req->r_osd);
1147 __move_osd_to_lru(osdc, req->r_osd);
1149 if (list_empty(&req->r_linger_item))
1153 list_del_init(&req->r_req_lru_item);
1154 ceph_osdc_put_request(req);
1156 if (osdc->num_requests == 0) {
1157 dout(" no requests, canceling timeout\n");
1158 __cancel_osd_timeout(osdc);
1163 * Cancel a previously queued request message
1165 static void __cancel_request(struct ceph_osd_request *req)
1167 if (req->r_sent && req->r_osd) {
1168 ceph_msg_revoke(req->r_request);
1173 static void __register_linger_request(struct ceph_osd_client *osdc,
1174 struct ceph_osd_request *req)
1176 dout("__register_linger_request %p\n", req);
1177 ceph_osdc_get_request(req);
1178 list_add_tail(&req->r_linger_item, &osdc->req_linger);
1180 list_add_tail(&req->r_linger_osd,
1181 &req->r_osd->o_linger_requests);
1184 static void __unregister_linger_request(struct ceph_osd_client *osdc,
1185 struct ceph_osd_request *req)
1187 dout("__unregister_linger_request %p\n", req);
1188 list_del_init(&req->r_linger_item);
1190 list_del_init(&req->r_linger_osd);
1192 if (list_empty(&req->r_osd->o_requests) &&
1193 list_empty(&req->r_osd->o_linger_requests)) {
1194 dout("moving osd to %p lru\n", req->r_osd);
1195 __move_osd_to_lru(osdc, req->r_osd);
1197 if (list_empty(&req->r_osd_item))
1200 ceph_osdc_put_request(req);
1203 void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1204 struct ceph_osd_request *req)
1206 mutex_lock(&osdc->request_mutex);
1207 if (req->r_linger) {
1209 __unregister_linger_request(osdc, req);
1211 mutex_unlock(&osdc->request_mutex);
1213 EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1215 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1216 struct ceph_osd_request *req)
1218 if (!req->r_linger) {
1219 dout("set_request_linger %p\n", req);
1223 EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1226 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1227 * (as needed), and set the request r_osd appropriately. If there is
1228 * no up osd, set r_osd to NULL. Move the request to the appropriate list
1229 * (unsent, homeless) or leave on in-flight lru.
1231 * Return 0 if unchanged, 1 if changed, or negative on error.
1233 * Caller should hold map_sem for read and request_mutex.
1235 static int __map_request(struct ceph_osd_client *osdc,
1236 struct ceph_osd_request *req, int force_resend)
1238 struct ceph_pg pgid;
1239 int acting[CEPH_PG_MAX_SIZE];
1240 int o = -1, num = 0;
1243 dout("map_request %p tid %lld\n", req, req->r_tid);
1244 err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
1245 ceph_file_layout_pg_pool(req->r_file_layout));
1247 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1252 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1258 if ((!force_resend &&
1259 req->r_osd && req->r_osd->o_osd == o &&
1260 req->r_sent >= req->r_osd->o_incarnation &&
1261 req->r_num_pg_osds == num &&
1262 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
1263 (req->r_osd == NULL && o == -1))
1264 return 0; /* no change */
1266 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1267 req->r_tid, pgid.pool, pgid.seed, o,
1268 req->r_osd ? req->r_osd->o_osd : -1);
1270 /* record full pg acting set */
1271 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1272 req->r_num_pg_osds = num;
1275 __cancel_request(req);
1276 list_del_init(&req->r_osd_item);
1280 req->r_osd = __lookup_osd(osdc, o);
1281 if (!req->r_osd && o >= 0) {
1283 req->r_osd = create_osd(osdc, o);
1285 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1289 dout("map_request osd %p is osd%d\n", req->r_osd, o);
1290 __insert_osd(osdc, req->r_osd);
1292 ceph_con_open(&req->r_osd->o_con,
1293 CEPH_ENTITY_TYPE_OSD, o,
1294 &osdc->osdmap->osd_addr[o]);
1298 __remove_osd_from_lru(req->r_osd);
1299 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1300 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1302 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1304 err = 1; /* osd or pg changed */
1311 * caller should hold map_sem (for read) and request_mutex
1313 static void __send_request(struct ceph_osd_client *osdc,
1314 struct ceph_osd_request *req)
1318 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1319 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1320 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1322 /* fill in message content that changes each time we send it */
1323 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1324 put_unaligned_le32(req->r_flags, req->r_request_flags);
1325 put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
1326 p = req->r_request_pgid;
1327 ceph_encode_64(&p, req->r_pgid.pool);
1328 ceph_encode_32(&p, req->r_pgid.seed);
1329 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1330 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1331 sizeof(req->r_reassert_version));
1333 req->r_stamp = jiffies;
1334 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1336 ceph_msg_get(req->r_request); /* send consumes a ref */
1338 /* Mark the request unsafe if this is the first timet's being sent. */
1340 if (!req->r_sent && req->r_unsafe_callback)
1341 req->r_unsafe_callback(req, true);
1342 req->r_sent = req->r_osd->o_incarnation;
1344 ceph_con_send(&req->r_osd->o_con, req->r_request);
1348 * Send any requests in the queue (req_unsent).
1350 static void __send_queued(struct ceph_osd_client *osdc)
1352 struct ceph_osd_request *req, *tmp;
1354 dout("__send_queued\n");
1355 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1356 __send_request(osdc, req);
1360 * Timeout callback, called every N seconds when 1 or more osd
1361 * requests has been active for more than N seconds. When this
1362 * happens, we ping all OSDs with requests who have timed out to
1363 * ensure any communications channel reset is detected. Reset the
1364 * request timeouts another N seconds in the future as we go.
1365 * Reschedule the timeout event another N seconds in future (unless
1366 * there are no open requests).
1368 static void handle_timeout(struct work_struct *work)
1370 struct ceph_osd_client *osdc =
1371 container_of(work, struct ceph_osd_client, timeout_work.work);
1372 struct ceph_osd_request *req;
1373 struct ceph_osd *osd;
1374 unsigned long keepalive =
1375 osdc->client->options->osd_keepalive_timeout * HZ;
1376 struct list_head slow_osds;
1378 down_read(&osdc->map_sem);
1380 ceph_monc_request_next_osdmap(&osdc->client->monc);
1382 mutex_lock(&osdc->request_mutex);
1385 * ping osds that are a bit slow. this ensures that if there
1386 * is a break in the TCP connection we will notice, and reopen
1387 * a connection with that osd (from the fault callback).
1389 INIT_LIST_HEAD(&slow_osds);
1390 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
1391 if (time_before(jiffies, req->r_stamp + keepalive))
1396 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1397 req->r_tid, osd->o_osd);
1398 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1400 while (!list_empty(&slow_osds)) {
1401 osd = list_entry(slow_osds.next, struct ceph_osd,
1403 list_del_init(&osd->o_keepalive_item);
1404 ceph_con_keepalive(&osd->o_con);
1407 __schedule_osd_timeout(osdc);
1408 __send_queued(osdc);
1409 mutex_unlock(&osdc->request_mutex);
1410 up_read(&osdc->map_sem);
1413 static void handle_osds_timeout(struct work_struct *work)
1415 struct ceph_osd_client *osdc =
1416 container_of(work, struct ceph_osd_client,
1417 osds_timeout_work.work);
1418 unsigned long delay =
1419 osdc->client->options->osd_idle_ttl * HZ >> 2;
1421 dout("osds timeout\n");
1422 down_read(&osdc->map_sem);
1423 remove_old_osds(osdc);
1424 up_read(&osdc->map_sem);
1426 schedule_delayed_work(&osdc->osds_timeout_work,
1427 round_jiffies_relative(delay));
1430 static void complete_request(struct ceph_osd_request *req)
1432 if (req->r_unsafe_callback)
1433 req->r_unsafe_callback(req, false);
1434 complete_all(&req->r_safe_completion); /* fsync waiter */
1438 * handle osd op reply. either call the callback if it is specified,
1439 * or do the completion to wake up the waiting thread.
1441 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1442 struct ceph_connection *con)
1445 struct ceph_osd_request *req;
1448 unsigned int numops;
1449 int payload_len, flags;
1455 u64 reassert_version;
1457 int already_completed;
1461 tid = le64_to_cpu(msg->hdr.tid);
1462 dout("handle_reply %p tid %llu\n", msg, tid);
1464 p = msg->front.iov_base;
1465 end = p + msg->front.iov_len;
1467 ceph_decode_need(&p, end, 4, bad);
1468 object_len = ceph_decode_32(&p);
1469 ceph_decode_need(&p, end, object_len, bad);
1472 err = ceph_decode_pgid(&p, end, &pg);
1476 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1477 flags = ceph_decode_64(&p);
1478 result = ceph_decode_32(&p);
1479 reassert_epoch = ceph_decode_32(&p);
1480 reassert_version = ceph_decode_64(&p);
1481 osdmap_epoch = ceph_decode_32(&p);
1484 mutex_lock(&osdc->request_mutex);
1485 req = __lookup_request(osdc, tid);
1487 dout("handle_reply tid %llu dne\n", tid);
1490 ceph_osdc_get_request(req);
1492 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1495 ceph_decode_need(&p, end, 4, bad);
1496 numops = ceph_decode_32(&p);
1497 if (numops > CEPH_OSD_MAX_OP)
1499 if (numops != req->r_num_ops)
1502 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad);
1503 for (i = 0; i < numops; i++) {
1504 struct ceph_osd_op *op = p;
1507 len = le32_to_cpu(op->payload_len);
1508 req->r_reply_op_len[i] = len;
1509 dout(" op %d has %d bytes\n", i, len);
1513 bytes = le32_to_cpu(msg->hdr.data_len);
1514 if (payload_len != bytes) {
1515 pr_warning("sum of op payload lens %d != data_len %d",
1516 payload_len, bytes);
1520 ceph_decode_need(&p, end, 4 + numops * 4, bad);
1521 retry_attempt = ceph_decode_32(&p);
1522 for (i = 0; i < numops; i++)
1523 req->r_reply_op_result[i] = ceph_decode_32(&p);
1525 if (!req->r_got_reply) {
1527 req->r_result = result;
1528 dout("handle_reply result %d bytes %d\n", req->r_result,
1530 if (req->r_result == 0)
1531 req->r_result = bytes;
1533 /* in case this is a write and we need to replay, */
1534 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1535 req->r_reassert_version.version = cpu_to_le64(reassert_version);
1537 req->r_got_reply = 1;
1538 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1539 dout("handle_reply tid %llu dup ack\n", tid);
1540 mutex_unlock(&osdc->request_mutex);
1544 dout("handle_reply tid %llu flags %d\n", tid, flags);
1546 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1547 __register_linger_request(osdc, req);
1549 /* either this is a read, or we got the safe response */
1551 (flags & CEPH_OSD_FLAG_ONDISK) ||
1552 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1553 __unregister_request(osdc, req);
1555 already_completed = req->r_completed;
1556 req->r_completed = 1;
1557 mutex_unlock(&osdc->request_mutex);
1558 if (already_completed)
1561 if (req->r_callback)
1562 req->r_callback(req, msg);
1564 complete_all(&req->r_completion);
1566 if (flags & CEPH_OSD_FLAG_ONDISK)
1567 complete_request(req);
1570 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
1571 ceph_osdc_put_request(req);
1575 ceph_osdc_put_request(req);
1577 mutex_unlock(&osdc->request_mutex);
1579 pr_err("corrupt osd_op_reply got %d %d\n",
1580 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1584 static void reset_changed_osds(struct ceph_osd_client *osdc)
1586 struct rb_node *p, *n;
1588 for (p = rb_first(&osdc->osds); p; p = n) {
1589 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
1592 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1593 memcmp(&osd->o_con.peer_addr,
1594 ceph_osd_addr(osdc->osdmap,
1596 sizeof(struct ceph_entity_addr)) != 0)
1597 __reset_osd(osdc, osd);
1602 * Requeue requests whose mapping to an OSD has changed. If requests map to
1603 * no osd, request a new map.
1605 * Caller should hold map_sem for read.
1607 static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
1609 struct ceph_osd_request *req, *nreq;
1614 dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
1615 mutex_lock(&osdc->request_mutex);
1616 for (p = rb_first(&osdc->requests); p; ) {
1617 req = rb_entry(p, struct ceph_osd_request, r_node);
1621 * For linger requests that have not yet been
1622 * registered, move them to the linger list; they'll
1623 * be sent to the osd in the loop below. Unregister
1624 * the request before re-registering it as a linger
1625 * request to ensure the __map_request() below
1626 * will decide it needs to be sent.
1628 if (req->r_linger && list_empty(&req->r_linger_item)) {
1629 dout("%p tid %llu restart on osd%d\n",
1631 req->r_osd ? req->r_osd->o_osd : -1);
1632 ceph_osdc_get_request(req);
1633 __unregister_request(osdc, req);
1634 __register_linger_request(osdc, req);
1635 ceph_osdc_put_request(req);
1639 err = __map_request(osdc, req, force_resend);
1641 continue; /* error */
1642 if (req->r_osd == NULL) {
1643 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1644 needmap++; /* request a newer map */
1645 } else if (err > 0) {
1646 if (!req->r_linger) {
1647 dout("%p tid %llu requeued on osd%d\n", req,
1649 req->r_osd ? req->r_osd->o_osd : -1);
1650 req->r_flags |= CEPH_OSD_FLAG_RETRY;
1655 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1657 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1659 err = __map_request(osdc, req, force_resend);
1660 dout("__map_request returned %d\n", err);
1662 continue; /* no change and no osd was specified */
1664 continue; /* hrm! */
1665 if (req->r_osd == NULL) {
1666 dout("tid %llu maps to no valid osd\n", req->r_tid);
1667 needmap++; /* request a newer map */
1671 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1672 req->r_osd ? req->r_osd->o_osd : -1);
1673 __register_request(osdc, req);
1674 __unregister_linger_request(osdc, req);
1676 reset_changed_osds(osdc);
1677 mutex_unlock(&osdc->request_mutex);
1680 dout("%d requests for down osds, need new map\n", needmap);
1681 ceph_monc_request_next_osdmap(&osdc->client->monc);
1687 * Process updated osd map.
1689 * The message contains any number of incremental and full maps, normally
1690 * indicating some sort of topology change in the cluster. Kick requests
1691 * off to different OSDs as needed.
1693 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1695 void *p, *end, *next;
1696 u32 nr_maps, maplen;
1698 struct ceph_osdmap *newmap = NULL, *oldmap;
1700 struct ceph_fsid fsid;
1702 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1703 p = msg->front.iov_base;
1704 end = p + msg->front.iov_len;
1707 ceph_decode_need(&p, end, sizeof(fsid), bad);
1708 ceph_decode_copy(&p, &fsid, sizeof(fsid));
1709 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1712 down_write(&osdc->map_sem);
1714 /* incremental maps */
1715 ceph_decode_32_safe(&p, end, nr_maps, bad);
1716 dout(" %d inc maps\n", nr_maps);
1717 while (nr_maps > 0) {
1718 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1719 epoch = ceph_decode_32(&p);
1720 maplen = ceph_decode_32(&p);
1721 ceph_decode_need(&p, end, maplen, bad);
1723 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1724 dout("applying incremental map %u len %d\n",
1726 newmap = osdmap_apply_incremental(&p, next,
1728 &osdc->client->msgr);
1729 if (IS_ERR(newmap)) {
1730 err = PTR_ERR(newmap);
1734 if (newmap != osdc->osdmap) {
1735 ceph_osdmap_destroy(osdc->osdmap);
1736 osdc->osdmap = newmap;
1738 kick_requests(osdc, 0);
1740 dout("ignoring incremental map %u len %d\n",
1750 ceph_decode_32_safe(&p, end, nr_maps, bad);
1751 dout(" %d full maps\n", nr_maps);
1753 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1754 epoch = ceph_decode_32(&p);
1755 maplen = ceph_decode_32(&p);
1756 ceph_decode_need(&p, end, maplen, bad);
1758 dout("skipping non-latest full map %u len %d\n",
1760 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1761 dout("skipping full map %u len %d, "
1762 "older than our %u\n", epoch, maplen,
1763 osdc->osdmap->epoch);
1765 int skipped_map = 0;
1767 dout("taking full map %u len %d\n", epoch, maplen);
1768 newmap = osdmap_decode(&p, p+maplen);
1769 if (IS_ERR(newmap)) {
1770 err = PTR_ERR(newmap);
1774 oldmap = osdc->osdmap;
1775 osdc->osdmap = newmap;
1777 if (oldmap->epoch + 1 < newmap->epoch)
1779 ceph_osdmap_destroy(oldmap);
1781 kick_requests(osdc, skipped_map);
1788 downgrade_write(&osdc->map_sem);
1789 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1792 * subscribe to subsequent osdmap updates if full to ensure
1793 * we find out when we are no longer full and stop returning
1796 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
1797 ceph_monc_request_next_osdmap(&osdc->client->monc);
1799 mutex_lock(&osdc->request_mutex);
1800 __send_queued(osdc);
1801 mutex_unlock(&osdc->request_mutex);
1802 up_read(&osdc->map_sem);
1803 wake_up_all(&osdc->client->auth_wq);
1807 pr_err("osdc handle_map corrupt msg\n");
1809 up_write(&osdc->map_sem);
1814 * watch/notify callback event infrastructure
1816 * These callbacks are used both for watch and notify operations.
1818 static void __release_event(struct kref *kref)
1820 struct ceph_osd_event *event =
1821 container_of(kref, struct ceph_osd_event, kref);
1823 dout("__release_event %p\n", event);
1827 static void get_event(struct ceph_osd_event *event)
1829 kref_get(&event->kref);
1832 void ceph_osdc_put_event(struct ceph_osd_event *event)
1834 kref_put(&event->kref, __release_event);
1836 EXPORT_SYMBOL(ceph_osdc_put_event);
1838 static void __insert_event(struct ceph_osd_client *osdc,
1839 struct ceph_osd_event *new)
1841 struct rb_node **p = &osdc->event_tree.rb_node;
1842 struct rb_node *parent = NULL;
1843 struct ceph_osd_event *event = NULL;
1847 event = rb_entry(parent, struct ceph_osd_event, node);
1848 if (new->cookie < event->cookie)
1850 else if (new->cookie > event->cookie)
1851 p = &(*p)->rb_right;
1856 rb_link_node(&new->node, parent, p);
1857 rb_insert_color(&new->node, &osdc->event_tree);
1860 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
1863 struct rb_node **p = &osdc->event_tree.rb_node;
1864 struct rb_node *parent = NULL;
1865 struct ceph_osd_event *event = NULL;
1869 event = rb_entry(parent, struct ceph_osd_event, node);
1870 if (cookie < event->cookie)
1872 else if (cookie > event->cookie)
1873 p = &(*p)->rb_right;
1880 static void __remove_event(struct ceph_osd_event *event)
1882 struct ceph_osd_client *osdc = event->osdc;
1884 if (!RB_EMPTY_NODE(&event->node)) {
1885 dout("__remove_event removed %p\n", event);
1886 rb_erase(&event->node, &osdc->event_tree);
1887 ceph_osdc_put_event(event);
1889 dout("__remove_event didn't remove %p\n", event);
1893 int ceph_osdc_create_event(struct ceph_osd_client *osdc,
1894 void (*event_cb)(u64, u64, u8, void *),
1895 void *data, struct ceph_osd_event **pevent)
1897 struct ceph_osd_event *event;
1899 event = kmalloc(sizeof(*event), GFP_NOIO);
1903 dout("create_event %p\n", event);
1904 event->cb = event_cb;
1905 event->one_shot = 0;
1908 INIT_LIST_HEAD(&event->osd_node);
1909 RB_CLEAR_NODE(&event->node);
1910 kref_init(&event->kref); /* one ref for us */
1911 kref_get(&event->kref); /* one ref for the caller */
1913 spin_lock(&osdc->event_lock);
1914 event->cookie = ++osdc->event_count;
1915 __insert_event(osdc, event);
1916 spin_unlock(&osdc->event_lock);
1921 EXPORT_SYMBOL(ceph_osdc_create_event);
1923 void ceph_osdc_cancel_event(struct ceph_osd_event *event)
1925 struct ceph_osd_client *osdc = event->osdc;
1927 dout("cancel_event %p\n", event);
1928 spin_lock(&osdc->event_lock);
1929 __remove_event(event);
1930 spin_unlock(&osdc->event_lock);
1931 ceph_osdc_put_event(event); /* caller's */
1933 EXPORT_SYMBOL(ceph_osdc_cancel_event);
1936 static void do_event_work(struct work_struct *work)
1938 struct ceph_osd_event_work *event_work =
1939 container_of(work, struct ceph_osd_event_work, work);
1940 struct ceph_osd_event *event = event_work->event;
1941 u64 ver = event_work->ver;
1942 u64 notify_id = event_work->notify_id;
1943 u8 opcode = event_work->opcode;
1945 dout("do_event_work completing %p\n", event);
1946 event->cb(ver, notify_id, opcode, event->data);
1947 dout("do_event_work completed %p\n", event);
1948 ceph_osdc_put_event(event);
1954 * Process osd watch notifications
1956 static void handle_watch_notify(struct ceph_osd_client *osdc,
1957 struct ceph_msg *msg)
1961 u64 cookie, ver, notify_id;
1963 struct ceph_osd_event *event;
1964 struct ceph_osd_event_work *event_work;
1966 p = msg->front.iov_base;
1967 end = p + msg->front.iov_len;
1969 ceph_decode_8_safe(&p, end, proto_ver, bad);
1970 ceph_decode_8_safe(&p, end, opcode, bad);
1971 ceph_decode_64_safe(&p, end, cookie, bad);
1972 ceph_decode_64_safe(&p, end, ver, bad);
1973 ceph_decode_64_safe(&p, end, notify_id, bad);
1975 spin_lock(&osdc->event_lock);
1976 event = __find_event(osdc, cookie);
1978 BUG_ON(event->one_shot);
1981 spin_unlock(&osdc->event_lock);
1982 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
1983 cookie, ver, event);
1985 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
1987 dout("ERROR: could not allocate event_work\n");
1990 INIT_WORK(&event_work->work, do_event_work);
1991 event_work->event = event;
1992 event_work->ver = ver;
1993 event_work->notify_id = notify_id;
1994 event_work->opcode = opcode;
1995 if (!queue_work(osdc->notify_wq, &event_work->work)) {
1996 dout("WARNING: failed to queue notify event work\n");
2004 ceph_osdc_put_event(event);
2008 pr_err("osdc handle_watch_notify corrupt msg\n");
2013 * build new request AND message
2016 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2017 struct ceph_snap_context *snapc, u64 snap_id,
2018 struct timespec *mtime)
2020 struct ceph_msg *msg = req->r_request;
2023 int flags = req->r_flags;
2027 req->r_snapid = snap_id;
2028 req->r_snapc = ceph_get_snap_context(snapc);
2030 /* encode request */
2031 msg->hdr.version = cpu_to_le16(4);
2033 p = msg->front.iov_base;
2034 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2035 req->r_request_osdmap_epoch = p;
2037 req->r_request_flags = p;
2039 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2040 ceph_encode_timespec(p, mtime);
2041 p += sizeof(struct ceph_timespec);
2042 req->r_request_reassert_version = p;
2043 p += sizeof(struct ceph_eversion); /* will get filled in */
2046 ceph_encode_8(&p, 4);
2047 ceph_encode_8(&p, 4);
2048 ceph_encode_32(&p, 8 + 4 + 4);
2049 req->r_request_pool = p;
2051 ceph_encode_32(&p, -1); /* preferred */
2052 ceph_encode_32(&p, 0); /* key len */
2054 ceph_encode_8(&p, 1);
2055 req->r_request_pgid = p;
2057 ceph_encode_32(&p, -1); /* preferred */
2060 ceph_encode_32(&p, req->r_oid_len);
2061 memcpy(p, req->r_oid, req->r_oid_len);
2062 dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
2063 p += req->r_oid_len;
2065 /* ops--can imply data */
2066 ceph_encode_16(&p, (u16)req->r_num_ops);
2068 for (i = 0; i < req->r_num_ops; i++) {
2069 data_len += osd_req_encode_op(req, p, i);
2070 p += sizeof(struct ceph_osd_op);
2074 ceph_encode_64(&p, req->r_snapid);
2075 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2076 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2078 for (i = 0; i < snapc->num_snaps; i++) {
2079 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2083 req->r_request_attempts = p;
2087 if (flags & CEPH_OSD_FLAG_WRITE) {
2091 * The header "data_off" is a hint to the receiver
2092 * allowing it to align received data into its
2093 * buffers such that there's no need to re-copy
2094 * it before writing it to disk (direct I/O).
2096 data_off = (u16) (off & 0xffff);
2097 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2099 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2101 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2102 msg_size = p - msg->front.iov_base;
2103 msg->front.iov_len = msg_size;
2104 msg->hdr.front_len = cpu_to_le32(msg_size);
2106 dout("build_request msg_size was %d\n", (int)msg_size);
2108 EXPORT_SYMBOL(ceph_osdc_build_request);
2111 * Register request, send initial attempt.
2113 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2114 struct ceph_osd_request *req,
2119 down_read(&osdc->map_sem);
2120 mutex_lock(&osdc->request_mutex);
2121 __register_request(osdc, req);
2123 req->r_got_reply = 0;
2124 req->r_completed = 0;
2125 rc = __map_request(osdc, req, 0);
2128 dout("osdc_start_request failed map, "
2129 " will retry %lld\n", req->r_tid);
2134 if (req->r_osd == NULL) {
2135 dout("send_request %p no up osds in pg\n", req);
2136 ceph_monc_request_next_osdmap(&osdc->client->monc);
2138 __send_queued(osdc);
2142 mutex_unlock(&osdc->request_mutex);
2143 up_read(&osdc->map_sem);
2146 EXPORT_SYMBOL(ceph_osdc_start_request);
2149 * wait for a request to complete
2151 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2152 struct ceph_osd_request *req)
2156 rc = wait_for_completion_interruptible(&req->r_completion);
2158 mutex_lock(&osdc->request_mutex);
2159 __cancel_request(req);
2160 __unregister_request(osdc, req);
2161 mutex_unlock(&osdc->request_mutex);
2162 complete_request(req);
2163 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
2167 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
2168 return req->r_result;
2170 EXPORT_SYMBOL(ceph_osdc_wait_request);
2173 * sync - wait for all in-flight requests to flush. avoid starvation.
2175 void ceph_osdc_sync(struct ceph_osd_client *osdc)
2177 struct ceph_osd_request *req;
2178 u64 last_tid, next_tid = 0;
2180 mutex_lock(&osdc->request_mutex);
2181 last_tid = osdc->last_tid;
2183 req = __lookup_request_ge(osdc, next_tid);
2186 if (req->r_tid > last_tid)
2189 next_tid = req->r_tid + 1;
2190 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2193 ceph_osdc_get_request(req);
2194 mutex_unlock(&osdc->request_mutex);
2195 dout("sync waiting on tid %llu (last is %llu)\n",
2196 req->r_tid, last_tid);
2197 wait_for_completion(&req->r_safe_completion);
2198 mutex_lock(&osdc->request_mutex);
2199 ceph_osdc_put_request(req);
2201 mutex_unlock(&osdc->request_mutex);
2202 dout("sync done (thru tid %llu)\n", last_tid);
2204 EXPORT_SYMBOL(ceph_osdc_sync);
2209 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2214 osdc->client = client;
2215 osdc->osdmap = NULL;
2216 init_rwsem(&osdc->map_sem);
2217 init_completion(&osdc->map_waiters);
2218 osdc->last_requested_map = 0;
2219 mutex_init(&osdc->request_mutex);
2221 osdc->osds = RB_ROOT;
2222 INIT_LIST_HEAD(&osdc->osd_lru);
2223 osdc->requests = RB_ROOT;
2224 INIT_LIST_HEAD(&osdc->req_lru);
2225 INIT_LIST_HEAD(&osdc->req_unsent);
2226 INIT_LIST_HEAD(&osdc->req_notarget);
2227 INIT_LIST_HEAD(&osdc->req_linger);
2228 osdc->num_requests = 0;
2229 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2230 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2231 spin_lock_init(&osdc->event_lock);
2232 osdc->event_tree = RB_ROOT;
2233 osdc->event_count = 0;
2235 schedule_delayed_work(&osdc->osds_timeout_work,
2236 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
2239 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2240 sizeof(struct ceph_osd_request));
2241 if (!osdc->req_mempool)
2244 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2245 OSD_OP_FRONT_LEN, 10, true,
2249 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2250 OSD_OPREPLY_FRONT_LEN, 10, true,
2255 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2256 if (IS_ERR(osdc->notify_wq)) {
2257 err = PTR_ERR(osdc->notify_wq);
2258 osdc->notify_wq = NULL;
2264 ceph_msgpool_destroy(&osdc->msgpool_op);
2266 mempool_destroy(osdc->req_mempool);
2271 void ceph_osdc_stop(struct ceph_osd_client *osdc)
2273 flush_workqueue(osdc->notify_wq);
2274 destroy_workqueue(osdc->notify_wq);
2275 cancel_delayed_work_sync(&osdc->timeout_work);
2276 cancel_delayed_work_sync(&osdc->osds_timeout_work);
2278 ceph_osdmap_destroy(osdc->osdmap);
2279 osdc->osdmap = NULL;
2281 remove_all_osds(osdc);
2282 mempool_destroy(osdc->req_mempool);
2283 ceph_msgpool_destroy(&osdc->msgpool_op);
2284 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2288 * Read some contiguous pages. If we cross a stripe boundary, shorten
2289 * *plen. Return number of bytes read, or error.
2291 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2292 struct ceph_vino vino, struct ceph_file_layout *layout,
2294 u32 truncate_seq, u64 truncate_size,
2295 struct page **pages, int num_pages, int page_align)
2297 struct ceph_osd_request *req;
2300 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2301 vino.snap, off, *plen);
2302 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
2303 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2304 NULL, truncate_seq, truncate_size,
2307 return PTR_ERR(req);
2309 /* it may be a short read due to an object boundary */
2311 osd_req_op_extent_osd_data_pages(req, 0,
2312 pages, *plen, page_align, false, false);
2314 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
2315 off, *plen, *plen, page_align);
2317 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2319 rc = ceph_osdc_start_request(osdc, req, false);
2321 rc = ceph_osdc_wait_request(osdc, req);
2323 ceph_osdc_put_request(req);
2324 dout("readpages result %d\n", rc);
2327 EXPORT_SYMBOL(ceph_osdc_readpages);
2330 * do a synchronous write on N pages
2332 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2333 struct ceph_file_layout *layout,
2334 struct ceph_snap_context *snapc,
2336 u32 truncate_seq, u64 truncate_size,
2337 struct timespec *mtime,
2338 struct page **pages, int num_pages)
2340 struct ceph_osd_request *req;
2342 int page_align = off & ~PAGE_MASK;
2344 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
2345 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
2347 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2348 snapc, truncate_seq, truncate_size,
2351 return PTR_ERR(req);
2353 /* it may be a short write due to an object boundary */
2354 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2356 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
2358 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2360 rc = ceph_osdc_start_request(osdc, req, true);
2362 rc = ceph_osdc_wait_request(osdc, req);
2364 ceph_osdc_put_request(req);
2367 dout("writepages result %d\n", rc);
2370 EXPORT_SYMBOL(ceph_osdc_writepages);
2372 int ceph_osdc_setup(void)
2374 BUG_ON(ceph_osd_request_cache);
2375 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2376 sizeof (struct ceph_osd_request),
2377 __alignof__(struct ceph_osd_request),
2380 return ceph_osd_request_cache ? 0 : -ENOMEM;
2382 EXPORT_SYMBOL(ceph_osdc_setup);
2384 void ceph_osdc_cleanup(void)
2386 BUG_ON(!ceph_osd_request_cache);
2387 kmem_cache_destroy(ceph_osd_request_cache);
2388 ceph_osd_request_cache = NULL;
2390 EXPORT_SYMBOL(ceph_osdc_cleanup);
2393 * handle incoming message
2395 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2397 struct ceph_osd *osd = con->private;
2398 struct ceph_osd_client *osdc;
2399 int type = le16_to_cpu(msg->hdr.type);
2406 case CEPH_MSG_OSD_MAP:
2407 ceph_osdc_handle_map(osdc, msg);
2409 case CEPH_MSG_OSD_OPREPLY:
2410 handle_reply(osdc, msg, con);
2412 case CEPH_MSG_WATCH_NOTIFY:
2413 handle_watch_notify(osdc, msg);
2417 pr_err("received unknown message type %d %s\n", type,
2418 ceph_msg_type_name(type));
2425 * lookup and return message for incoming reply. set up reply message
2428 static struct ceph_msg *get_reply(struct ceph_connection *con,
2429 struct ceph_msg_header *hdr,
2432 struct ceph_osd *osd = con->private;
2433 struct ceph_osd_client *osdc = osd->o_osdc;
2435 struct ceph_osd_request *req;
2436 int front = le32_to_cpu(hdr->front_len);
2437 int data_len = le32_to_cpu(hdr->data_len);
2440 tid = le64_to_cpu(hdr->tid);
2441 mutex_lock(&osdc->request_mutex);
2442 req = __lookup_request(osdc, tid);
2446 dout("get_reply unknown tid %llu from osd%d\n", tid,
2451 if (req->r_reply->con)
2452 dout("%s revoking msg %p from old con %p\n", __func__,
2453 req->r_reply, req->r_reply->con);
2454 ceph_msg_revoke_incoming(req->r_reply);
2456 if (front > req->r_reply->front.iov_len) {
2457 pr_warning("get_reply front %d > preallocated %d\n",
2458 front, (int)req->r_reply->front.iov_len);
2459 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
2462 ceph_msg_put(req->r_reply);
2465 m = ceph_msg_get(req->r_reply);
2468 struct ceph_osd_data *osd_data;
2471 * XXX This is assuming there is only one op containing
2472 * XXX page data. Probably OK for reads, but this
2473 * XXX ought to be done more generally.
2475 osd_data = osd_req_op_extent_osd_data(req, 0);
2476 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
2477 if (osd_data->pages &&
2478 unlikely(osd_data->length < data_len)) {
2480 pr_warning("tid %lld reply has %d bytes "
2481 "we had only %llu bytes ready\n",
2482 tid, data_len, osd_data->length);
2491 dout("get_reply tid %lld %p\n", tid, m);
2494 mutex_unlock(&osdc->request_mutex);
2499 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2500 struct ceph_msg_header *hdr,
2503 struct ceph_osd *osd = con->private;
2504 int type = le16_to_cpu(hdr->type);
2505 int front = le32_to_cpu(hdr->front_len);
2509 case CEPH_MSG_OSD_MAP:
2510 case CEPH_MSG_WATCH_NOTIFY:
2511 return ceph_msg_new(type, front, GFP_NOFS, false);
2512 case CEPH_MSG_OSD_OPREPLY:
2513 return get_reply(con, hdr, skip);
2515 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2523 * Wrappers to refcount containing ceph_osd struct
2525 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2527 struct ceph_osd *osd = con->private;
2533 static void put_osd_con(struct ceph_connection *con)
2535 struct ceph_osd *osd = con->private;
2543 * Note: returned pointer is the address of a structure that's
2544 * managed separately. Caller must *not* attempt to free it.
2546 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
2547 int *proto, int force_new)
2549 struct ceph_osd *o = con->private;
2550 struct ceph_osd_client *osdc = o->o_osdc;
2551 struct ceph_auth_client *ac = osdc->client->monc.auth;
2552 struct ceph_auth_handshake *auth = &o->o_auth;
2554 if (force_new && auth->authorizer) {
2555 ceph_auth_destroy_authorizer(ac, auth->authorizer);
2556 auth->authorizer = NULL;
2558 if (!auth->authorizer) {
2559 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2562 return ERR_PTR(ret);
2564 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2567 return ERR_PTR(ret);
2569 *proto = ac->protocol;
2575 static int verify_authorizer_reply(struct ceph_connection *con, int len)
2577 struct ceph_osd *o = con->private;
2578 struct ceph_osd_client *osdc = o->o_osdc;
2579 struct ceph_auth_client *ac = osdc->client->monc.auth;
2581 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2584 static int invalidate_authorizer(struct ceph_connection *con)
2586 struct ceph_osd *o = con->private;
2587 struct ceph_osd_client *osdc = o->o_osdc;
2588 struct ceph_auth_client *ac = osdc->client->monc.auth;
2590 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2591 return ceph_monc_validate_auth(&osdc->client->monc);
2594 static const struct ceph_connection_operations osd_con_ops = {
2597 .dispatch = dispatch,
2598 .get_authorizer = get_authorizer,
2599 .verify_authorizer_reply = verify_authorizer_reply,
2600 .invalidate_authorizer = invalidate_authorizer,
2601 .alloc_msg = alloc_msg,