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_request(struct ceph_osd_client *osdc,
34 struct ceph_osd_request *req);
35 static void __unregister_linger_request(struct ceph_osd_client *osdc,
36 struct ceph_osd_request *req);
37 static void __enqueue_request(struct ceph_osd_request *req);
38 static void __send_request(struct ceph_osd_client *osdc,
39 struct ceph_osd_request *req);
42 * Implement client access to distributed object storage cluster.
44 * All data objects are stored within a cluster/cloud of OSDs, or
45 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
46 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
47 * remote daemons serving up and coordinating consistent and safe
50 * Cluster membership and the mapping of data objects onto storage devices
51 * are described by the osd map.
53 * We keep track of pending OSD requests (read, write), resubmit
54 * requests to different OSDs when the cluster topology/data layout
55 * change, or retry the affected requests when the communications
56 * channel with an OSD is reset.
60 * calculate the mapping of a file extent onto an object, and fill out the
61 * request accordingly. shorten extent as necessary if it crosses an
64 * fill osd op in request message.
66 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
67 u64 *objnum, u64 *objoff, u64 *objlen)
73 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
77 if (*objlen < orig_len) {
79 dout(" skipping last %llu, final file extent %llu~%llu\n",
80 orig_len - *plen, off, *plen);
83 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
88 static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
90 memset(osd_data, 0, sizeof (*osd_data));
91 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
94 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
95 struct page **pages, u64 length, u32 alignment,
96 bool pages_from_pool, bool own_pages)
98 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
99 osd_data->pages = pages;
100 osd_data->length = length;
101 osd_data->alignment = alignment;
102 osd_data->pages_from_pool = pages_from_pool;
103 osd_data->own_pages = own_pages;
106 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
107 struct ceph_pagelist *pagelist)
109 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
110 osd_data->pagelist = pagelist;
114 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
115 struct bio *bio, size_t bio_length)
117 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
119 osd_data->bio_length = bio_length;
121 #endif /* CONFIG_BLOCK */
123 #define osd_req_op_data(oreq, whch, typ, fld) \
125 BUG_ON(whch >= (oreq)->r_num_ops); \
126 &(oreq)->r_ops[whch].typ.fld; \
129 static struct ceph_osd_data *
130 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
132 BUG_ON(which >= osd_req->r_num_ops);
134 return &osd_req->r_ops[which].raw_data_in;
137 struct ceph_osd_data *
138 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
141 return osd_req_op_data(osd_req, which, extent, osd_data);
143 EXPORT_SYMBOL(osd_req_op_extent_osd_data);
145 struct ceph_osd_data *
146 osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
149 return osd_req_op_data(osd_req, which, cls, response_data);
151 EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
153 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
154 unsigned int which, struct page **pages,
155 u64 length, u32 alignment,
156 bool pages_from_pool, bool own_pages)
158 struct ceph_osd_data *osd_data;
160 osd_data = osd_req_op_raw_data_in(osd_req, which);
161 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
162 pages_from_pool, own_pages);
164 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
166 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
167 unsigned int which, struct page **pages,
168 u64 length, u32 alignment,
169 bool pages_from_pool, bool own_pages)
171 struct ceph_osd_data *osd_data;
173 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
174 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
175 pages_from_pool, own_pages);
177 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
179 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
180 unsigned int which, struct ceph_pagelist *pagelist)
182 struct ceph_osd_data *osd_data;
184 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
185 ceph_osd_data_pagelist_init(osd_data, pagelist);
187 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
190 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
191 unsigned int which, struct bio *bio, size_t bio_length)
193 struct ceph_osd_data *osd_data;
195 osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
196 ceph_osd_data_bio_init(osd_data, bio, bio_length);
198 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
199 #endif /* CONFIG_BLOCK */
201 static void osd_req_op_cls_request_info_pagelist(
202 struct ceph_osd_request *osd_req,
203 unsigned int which, struct ceph_pagelist *pagelist)
205 struct ceph_osd_data *osd_data;
207 osd_data = osd_req_op_data(osd_req, which, cls, request_info);
208 ceph_osd_data_pagelist_init(osd_data, pagelist);
211 void osd_req_op_cls_request_data_pagelist(
212 struct ceph_osd_request *osd_req,
213 unsigned int which, struct ceph_pagelist *pagelist)
215 struct ceph_osd_data *osd_data;
217 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
218 ceph_osd_data_pagelist_init(osd_data, pagelist);
220 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
222 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
223 unsigned int which, struct page **pages, u64 length,
224 u32 alignment, bool pages_from_pool, bool own_pages)
226 struct ceph_osd_data *osd_data;
228 osd_data = osd_req_op_data(osd_req, which, cls, request_data);
229 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
230 pages_from_pool, own_pages);
232 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
234 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
235 unsigned int which, struct page **pages, u64 length,
236 u32 alignment, bool pages_from_pool, bool own_pages)
238 struct ceph_osd_data *osd_data;
240 osd_data = osd_req_op_data(osd_req, which, cls, response_data);
241 ceph_osd_data_pages_init(osd_data, pages, length, alignment,
242 pages_from_pool, own_pages);
244 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
246 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
248 switch (osd_data->type) {
249 case CEPH_OSD_DATA_TYPE_NONE:
251 case CEPH_OSD_DATA_TYPE_PAGES:
252 return osd_data->length;
253 case CEPH_OSD_DATA_TYPE_PAGELIST:
254 return (u64)osd_data->pagelist->length;
256 case CEPH_OSD_DATA_TYPE_BIO:
257 return (u64)osd_data->bio_length;
258 #endif /* CONFIG_BLOCK */
260 WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
265 static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
267 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
270 num_pages = calc_pages_for((u64)osd_data->alignment,
271 (u64)osd_data->length);
272 ceph_release_page_vector(osd_data->pages, num_pages);
274 ceph_osd_data_init(osd_data);
277 static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
280 struct ceph_osd_req_op *op;
282 BUG_ON(which >= osd_req->r_num_ops);
283 op = &osd_req->r_ops[which];
286 case CEPH_OSD_OP_READ:
287 case CEPH_OSD_OP_WRITE:
288 ceph_osd_data_release(&op->extent.osd_data);
290 case CEPH_OSD_OP_CALL:
291 ceph_osd_data_release(&op->cls.request_info);
292 ceph_osd_data_release(&op->cls.request_data);
293 ceph_osd_data_release(&op->cls.response_data);
295 case CEPH_OSD_OP_SETXATTR:
296 case CEPH_OSD_OP_CMPXATTR:
297 ceph_osd_data_release(&op->xattr.osd_data);
299 case CEPH_OSD_OP_STAT:
300 ceph_osd_data_release(&op->raw_data_in);
310 static void ceph_osdc_release_request(struct kref *kref)
312 struct ceph_osd_request *req = container_of(kref,
313 struct ceph_osd_request, r_kref);
316 dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
317 req->r_request, req->r_reply);
318 WARN_ON(!RB_EMPTY_NODE(&req->r_node));
319 WARN_ON(!list_empty(&req->r_req_lru_item));
320 WARN_ON(!list_empty(&req->r_osd_item));
321 WARN_ON(!list_empty(&req->r_linger_item));
322 WARN_ON(!list_empty(&req->r_linger_osd_item));
326 ceph_msg_put(req->r_request);
328 ceph_msg_revoke_incoming(req->r_reply);
329 ceph_msg_put(req->r_reply);
332 for (which = 0; which < req->r_num_ops; which++)
333 osd_req_op_data_release(req, which);
335 ceph_put_snap_context(req->r_snapc);
337 mempool_free(req, req->r_osdc->req_mempool);
339 kmem_cache_free(ceph_osd_request_cache, req);
343 void ceph_osdc_get_request(struct ceph_osd_request *req)
345 dout("%s %p (was %d)\n", __func__, req,
346 atomic_read(&req->r_kref.refcount));
347 kref_get(&req->r_kref);
349 EXPORT_SYMBOL(ceph_osdc_get_request);
351 void ceph_osdc_put_request(struct ceph_osd_request *req)
353 dout("%s %p (was %d)\n", __func__, req,
354 atomic_read(&req->r_kref.refcount));
355 kref_put(&req->r_kref, ceph_osdc_release_request);
357 EXPORT_SYMBOL(ceph_osdc_put_request);
359 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
360 struct ceph_snap_context *snapc,
361 unsigned int num_ops,
365 struct ceph_osd_request *req;
366 struct ceph_msg *msg;
369 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
370 BUG_ON(num_ops > CEPH_OSD_MAX_OP);
372 msg_size = 4 + 4 + 8 + 8 + 4+8;
373 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
374 msg_size += 1 + 8 + 4 + 4; /* pg_t */
375 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
376 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
377 msg_size += 8; /* snapid */
378 msg_size += 8; /* snap_seq */
379 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
383 req = mempool_alloc(osdc->req_mempool, gfp_flags);
384 memset(req, 0, sizeof(*req));
386 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
392 req->r_mempool = use_mempool;
393 req->r_num_ops = num_ops;
395 kref_init(&req->r_kref);
396 init_completion(&req->r_completion);
397 init_completion(&req->r_safe_completion);
398 RB_CLEAR_NODE(&req->r_node);
399 INIT_LIST_HEAD(&req->r_unsafe_item);
400 INIT_LIST_HEAD(&req->r_linger_item);
401 INIT_LIST_HEAD(&req->r_linger_osd_item);
402 INIT_LIST_HEAD(&req->r_req_lru_item);
403 INIT_LIST_HEAD(&req->r_osd_item);
405 req->r_base_oloc.pool = -1;
406 req->r_target_oloc.pool = -1;
408 /* create reply message */
410 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
412 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
413 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
415 ceph_osdc_put_request(req);
420 /* create request message; allow space for oid */
422 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
424 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
426 ceph_osdc_put_request(req);
430 memset(msg->front.iov_base, 0, msg->front.iov_len);
432 req->r_request = msg;
436 EXPORT_SYMBOL(ceph_osdc_alloc_request);
438 static bool osd_req_opcode_valid(u16 opcode)
441 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
442 __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
450 * This is an osd op init function for opcodes that have no data or
451 * other information associated with them. It also serves as a
452 * common init routine for all the other init functions, below.
454 static struct ceph_osd_req_op *
455 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
456 u16 opcode, u32 flags)
458 struct ceph_osd_req_op *op;
460 BUG_ON(which >= osd_req->r_num_ops);
461 BUG_ON(!osd_req_opcode_valid(opcode));
463 op = &osd_req->r_ops[which];
464 memset(op, 0, sizeof (*op));
471 void osd_req_op_init(struct ceph_osd_request *osd_req,
472 unsigned int which, u16 opcode, u32 flags)
474 (void)_osd_req_op_init(osd_req, which, opcode, flags);
476 EXPORT_SYMBOL(osd_req_op_init);
478 void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
479 unsigned int which, u16 opcode,
480 u64 offset, u64 length,
481 u64 truncate_size, u32 truncate_seq)
483 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
485 size_t payload_len = 0;
487 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
488 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE);
490 op->extent.offset = offset;
491 op->extent.length = length;
492 op->extent.truncate_size = truncate_size;
493 op->extent.truncate_seq = truncate_seq;
494 if (opcode == CEPH_OSD_OP_WRITE)
495 payload_len += length;
497 op->payload_len = payload_len;
499 EXPORT_SYMBOL(osd_req_op_extent_init);
501 void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
502 unsigned int which, u64 length)
504 struct ceph_osd_req_op *op;
507 BUG_ON(which >= osd_req->r_num_ops);
508 op = &osd_req->r_ops[which];
509 previous = op->extent.length;
511 if (length == previous)
512 return; /* Nothing to do */
513 BUG_ON(length > previous);
515 op->extent.length = length;
516 op->payload_len -= previous - length;
518 EXPORT_SYMBOL(osd_req_op_extent_update);
520 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
521 u16 opcode, const char *class, const char *method)
523 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
525 struct ceph_pagelist *pagelist;
526 size_t payload_len = 0;
529 BUG_ON(opcode != CEPH_OSD_OP_CALL);
531 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
533 ceph_pagelist_init(pagelist);
535 op->cls.class_name = class;
536 size = strlen(class);
537 BUG_ON(size > (size_t) U8_MAX);
538 op->cls.class_len = size;
539 ceph_pagelist_append(pagelist, class, size);
542 op->cls.method_name = method;
543 size = strlen(method);
544 BUG_ON(size > (size_t) U8_MAX);
545 op->cls.method_len = size;
546 ceph_pagelist_append(pagelist, method, size);
549 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
551 op->cls.argc = 0; /* currently unused */
553 op->payload_len = payload_len;
555 EXPORT_SYMBOL(osd_req_op_cls_init);
557 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
558 u16 opcode, const char *name, const void *value,
559 size_t size, u8 cmp_op, u8 cmp_mode)
561 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
563 struct ceph_pagelist *pagelist;
566 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
568 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
572 ceph_pagelist_init(pagelist);
574 payload_len = strlen(name);
575 op->xattr.name_len = payload_len;
576 ceph_pagelist_append(pagelist, name, payload_len);
578 op->xattr.value_len = size;
579 ceph_pagelist_append(pagelist, value, size);
582 op->xattr.cmp_op = cmp_op;
583 op->xattr.cmp_mode = cmp_mode;
585 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
586 op->payload_len = payload_len;
589 EXPORT_SYMBOL(osd_req_op_xattr_init);
591 void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
592 unsigned int which, u16 opcode,
593 u64 cookie, u64 version, int flag)
595 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
598 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
600 op->watch.cookie = cookie;
601 op->watch.ver = version;
602 if (opcode == CEPH_OSD_OP_WATCH && flag)
603 op->watch.flag = (u8)1;
605 EXPORT_SYMBOL(osd_req_op_watch_init);
607 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
609 u64 expected_object_size,
610 u64 expected_write_size)
612 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
613 CEPH_OSD_OP_SETALLOCHINT,
616 op->alloc_hint.expected_object_size = expected_object_size;
617 op->alloc_hint.expected_write_size = expected_write_size;
620 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
621 * not worth a feature bit. Set FAILOK per-op flag to make
622 * sure older osds don't trip over an unsupported opcode.
624 op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
626 EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
628 static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
629 struct ceph_osd_data *osd_data)
631 u64 length = ceph_osd_data_length(osd_data);
633 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
634 BUG_ON(length > (u64) SIZE_MAX);
636 ceph_msg_data_add_pages(msg, osd_data->pages,
637 length, osd_data->alignment);
638 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
640 ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
642 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
643 ceph_msg_data_add_bio(msg, osd_data->bio, length);
646 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
650 static u64 osd_req_encode_op(struct ceph_osd_request *req,
651 struct ceph_osd_op *dst, unsigned int which)
653 struct ceph_osd_req_op *src;
654 struct ceph_osd_data *osd_data;
655 u64 request_data_len = 0;
658 BUG_ON(which >= req->r_num_ops);
659 src = &req->r_ops[which];
660 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
661 pr_err("unrecognized osd opcode %d\n", src->op);
667 case CEPH_OSD_OP_STAT:
668 osd_data = &src->raw_data_in;
669 ceph_osdc_msg_data_add(req->r_reply, osd_data);
671 case CEPH_OSD_OP_READ:
672 case CEPH_OSD_OP_WRITE:
673 case CEPH_OSD_OP_ZERO:
674 case CEPH_OSD_OP_TRUNCATE:
675 if (src->op == CEPH_OSD_OP_WRITE)
676 request_data_len = src->extent.length;
677 dst->extent.offset = cpu_to_le64(src->extent.offset);
678 dst->extent.length = cpu_to_le64(src->extent.length);
679 dst->extent.truncate_size =
680 cpu_to_le64(src->extent.truncate_size);
681 dst->extent.truncate_seq =
682 cpu_to_le32(src->extent.truncate_seq);
683 osd_data = &src->extent.osd_data;
684 if (src->op == CEPH_OSD_OP_WRITE)
685 ceph_osdc_msg_data_add(req->r_request, osd_data);
687 ceph_osdc_msg_data_add(req->r_reply, osd_data);
689 case CEPH_OSD_OP_CALL:
690 dst->cls.class_len = src->cls.class_len;
691 dst->cls.method_len = src->cls.method_len;
692 osd_data = &src->cls.request_info;
693 ceph_osdc_msg_data_add(req->r_request, osd_data);
694 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
695 request_data_len = osd_data->pagelist->length;
697 osd_data = &src->cls.request_data;
698 data_length = ceph_osd_data_length(osd_data);
700 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
701 dst->cls.indata_len = cpu_to_le32(data_length);
702 ceph_osdc_msg_data_add(req->r_request, osd_data);
703 src->payload_len += data_length;
704 request_data_len += data_length;
706 osd_data = &src->cls.response_data;
707 ceph_osdc_msg_data_add(req->r_reply, osd_data);
709 case CEPH_OSD_OP_STARTSYNC:
711 case CEPH_OSD_OP_NOTIFY_ACK:
712 case CEPH_OSD_OP_WATCH:
713 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
714 dst->watch.ver = cpu_to_le64(src->watch.ver);
715 dst->watch.flag = src->watch.flag;
717 case CEPH_OSD_OP_SETALLOCHINT:
718 dst->alloc_hint.expected_object_size =
719 cpu_to_le64(src->alloc_hint.expected_object_size);
720 dst->alloc_hint.expected_write_size =
721 cpu_to_le64(src->alloc_hint.expected_write_size);
723 case CEPH_OSD_OP_SETXATTR:
724 case CEPH_OSD_OP_CMPXATTR:
725 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
726 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
727 dst->xattr.cmp_op = src->xattr.cmp_op;
728 dst->xattr.cmp_mode = src->xattr.cmp_mode;
729 osd_data = &src->xattr.osd_data;
730 ceph_osdc_msg_data_add(req->r_request, osd_data);
731 request_data_len = osd_data->pagelist->length;
733 case CEPH_OSD_OP_CREATE:
734 case CEPH_OSD_OP_DELETE:
737 pr_err("unsupported osd opcode %s\n",
738 ceph_osd_op_name(src->op));
744 dst->op = cpu_to_le16(src->op);
745 dst->flags = cpu_to_le32(src->flags);
746 dst->payload_len = cpu_to_le32(src->payload_len);
748 return request_data_len;
752 * build new request AND message, calculate layout, and adjust file
755 * if the file was recently truncated, we include information about its
756 * old and new size so that the object can be updated appropriately. (we
757 * avoid synchronously deleting truncated objects because it's slow.)
759 * if @do_sync, include a 'startsync' command so that the osd will flush
762 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
763 struct ceph_file_layout *layout,
764 struct ceph_vino vino,
766 unsigned int which, int num_ops,
767 int opcode, int flags,
768 struct ceph_snap_context *snapc,
773 struct ceph_osd_request *req;
779 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
780 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
781 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
783 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
786 return ERR_PTR(-ENOMEM);
788 req->r_flags = flags;
790 /* calculate max write size */
791 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
793 ceph_osdc_put_request(req);
797 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
798 osd_req_op_init(req, which, opcode, 0);
800 u32 object_size = le32_to_cpu(layout->fl_object_size);
801 u32 object_base = off - objoff;
802 if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
803 if (truncate_size <= object_base) {
806 truncate_size -= object_base;
807 if (truncate_size > object_size)
808 truncate_size = object_size;
811 osd_req_op_extent_init(req, which, opcode, objoff, objlen,
812 truncate_size, truncate_seq);
815 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
817 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
818 "%llx.%08llx", vino.ino, objnum);
819 req->r_base_oid.name_len = strlen(req->r_base_oid.name);
823 EXPORT_SYMBOL(ceph_osdc_new_request);
826 * We keep osd requests in an rbtree, sorted by ->r_tid.
828 static void __insert_request(struct ceph_osd_client *osdc,
829 struct ceph_osd_request *new)
831 struct rb_node **p = &osdc->requests.rb_node;
832 struct rb_node *parent = NULL;
833 struct ceph_osd_request *req = NULL;
837 req = rb_entry(parent, struct ceph_osd_request, r_node);
838 if (new->r_tid < req->r_tid)
840 else if (new->r_tid > req->r_tid)
846 rb_link_node(&new->r_node, parent, p);
847 rb_insert_color(&new->r_node, &osdc->requests);
850 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
853 struct ceph_osd_request *req;
854 struct rb_node *n = osdc->requests.rb_node;
857 req = rb_entry(n, struct ceph_osd_request, r_node);
858 if (tid < req->r_tid)
860 else if (tid > req->r_tid)
868 static struct ceph_osd_request *
869 __lookup_request_ge(struct ceph_osd_client *osdc,
872 struct ceph_osd_request *req;
873 struct rb_node *n = osdc->requests.rb_node;
876 req = rb_entry(n, struct ceph_osd_request, r_node);
877 if (tid < req->r_tid) {
881 } else if (tid > req->r_tid) {
890 static void __kick_linger_request(struct ceph_osd_request *req)
892 struct ceph_osd_client *osdc = req->r_osdc;
893 struct ceph_osd *osd = req->r_osd;
896 * Linger requests need to be resent with a new tid to avoid
897 * the dup op detection logic on the OSDs. Achieve this with
898 * a re-register dance instead of open-coding.
900 ceph_osdc_get_request(req);
901 if (!list_empty(&req->r_linger_item))
902 __unregister_linger_request(osdc, req);
904 __unregister_request(osdc, req);
905 __register_request(osdc, req);
906 ceph_osdc_put_request(req);
909 * Unless request has been registered as both normal and
910 * lingering, __unregister{,_linger}_request clears r_osd.
911 * However, here we need to preserve r_osd to make sure we
912 * requeue on the same OSD.
914 WARN_ON(req->r_osd || !osd);
917 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
918 __enqueue_request(req);
922 * Resubmit requests pending on the given osd.
924 static void __kick_osd_requests(struct ceph_osd_client *osdc,
925 struct ceph_osd *osd)
927 struct ceph_osd_request *req, *nreq;
929 LIST_HEAD(resend_linger);
932 dout("%s osd%d\n", __func__, osd->o_osd);
933 err = __reset_osd(osdc, osd);
938 * Build up a list of requests to resend by traversing the
939 * osd's list of requests. Requests for a given object are
940 * sent in tid order, and that is also the order they're
941 * kept on this list. Therefore all requests that are in
942 * flight will be found first, followed by all requests that
943 * have not yet been sent. And to resend requests while
944 * preserving this order we will want to put any sent
945 * requests back on the front of the osd client's unsent
948 * So we build a separate ordered list of already-sent
949 * requests for the affected osd and splice it onto the
950 * front of the osd client's unsent list. Once we've seen a
951 * request that has not yet been sent we're done. Those
952 * requests are already sitting right where they belong.
954 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
958 if (!req->r_linger) {
959 dout("%s requeueing %p tid %llu\n", __func__, req,
961 list_move_tail(&req->r_req_lru_item, &resend);
962 req->r_flags |= CEPH_OSD_FLAG_RETRY;
964 list_move_tail(&req->r_req_lru_item, &resend_linger);
967 list_splice(&resend, &osdc->req_unsent);
970 * Both registered and not yet registered linger requests are
971 * enqueued with a new tid on the same OSD. We add/move them
972 * to req_unsent/o_requests at the end to keep things in tid
975 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
977 WARN_ON(!list_empty(&req->r_req_lru_item));
978 __kick_linger_request(req);
981 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
982 __kick_linger_request(req);
986 * If the osd connection drops, we need to resubmit all requests.
988 static void osd_reset(struct ceph_connection *con)
990 struct ceph_osd *osd = con->private;
991 struct ceph_osd_client *osdc;
995 dout("osd_reset osd%d\n", osd->o_osd);
997 down_read(&osdc->map_sem);
998 mutex_lock(&osdc->request_mutex);
999 __kick_osd_requests(osdc, osd);
1000 __send_queued(osdc);
1001 mutex_unlock(&osdc->request_mutex);
1002 up_read(&osdc->map_sem);
1006 * Track open sessions with osds.
1008 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1010 struct ceph_osd *osd;
1012 osd = kzalloc(sizeof(*osd), GFP_NOFS);
1016 atomic_set(&osd->o_ref, 1);
1019 RB_CLEAR_NODE(&osd->o_node);
1020 INIT_LIST_HEAD(&osd->o_requests);
1021 INIT_LIST_HEAD(&osd->o_linger_requests);
1022 INIT_LIST_HEAD(&osd->o_osd_lru);
1023 osd->o_incarnation = 1;
1025 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1027 INIT_LIST_HEAD(&osd->o_keepalive_item);
1031 static struct ceph_osd *get_osd(struct ceph_osd *osd)
1033 if (atomic_inc_not_zero(&osd->o_ref)) {
1034 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
1035 atomic_read(&osd->o_ref));
1038 dout("get_osd %p FAIL\n", osd);
1043 static void put_osd(struct ceph_osd *osd)
1045 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
1046 atomic_read(&osd->o_ref) - 1);
1047 if (atomic_dec_and_test(&osd->o_ref)) {
1048 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
1050 if (osd->o_auth.authorizer)
1051 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
1057 * remove an osd from our map
1059 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1061 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1062 WARN_ON(!list_empty(&osd->o_requests));
1063 WARN_ON(!list_empty(&osd->o_linger_requests));
1065 list_del_init(&osd->o_osd_lru);
1066 rb_erase(&osd->o_node, &osdc->osds);
1067 RB_CLEAR_NODE(&osd->o_node);
1070 static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1072 dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1074 if (!RB_EMPTY_NODE(&osd->o_node)) {
1075 ceph_con_close(&osd->o_con);
1076 __remove_osd(osdc, osd);
1081 static void remove_all_osds(struct ceph_osd_client *osdc)
1083 dout("%s %p\n", __func__, osdc);
1084 mutex_lock(&osdc->request_mutex);
1085 while (!RB_EMPTY_ROOT(&osdc->osds)) {
1086 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
1087 struct ceph_osd, o_node);
1088 remove_osd(osdc, osd);
1090 mutex_unlock(&osdc->request_mutex);
1093 static void __move_osd_to_lru(struct ceph_osd_client *osdc,
1094 struct ceph_osd *osd)
1096 dout("%s %p\n", __func__, osd);
1097 BUG_ON(!list_empty(&osd->o_osd_lru));
1099 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1100 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
1103 static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
1104 struct ceph_osd *osd)
1106 dout("%s %p\n", __func__, osd);
1108 if (list_empty(&osd->o_requests) &&
1109 list_empty(&osd->o_linger_requests))
1110 __move_osd_to_lru(osdc, osd);
1113 static void __remove_osd_from_lru(struct ceph_osd *osd)
1115 dout("__remove_osd_from_lru %p\n", osd);
1116 if (!list_empty(&osd->o_osd_lru))
1117 list_del_init(&osd->o_osd_lru);
1120 static void remove_old_osds(struct ceph_osd_client *osdc)
1122 struct ceph_osd *osd, *nosd;
1124 dout("__remove_old_osds %p\n", osdc);
1125 mutex_lock(&osdc->request_mutex);
1126 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1127 if (time_before(jiffies, osd->lru_ttl))
1129 remove_osd(osdc, osd);
1131 mutex_unlock(&osdc->request_mutex);
1137 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
1139 struct ceph_entity_addr *peer_addr;
1141 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1142 if (list_empty(&osd->o_requests) &&
1143 list_empty(&osd->o_linger_requests)) {
1144 remove_osd(osdc, osd);
1148 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
1149 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1150 !ceph_con_opened(&osd->o_con)) {
1151 struct ceph_osd_request *req;
1153 dout("osd addr hasn't changed and connection never opened, "
1154 "letting msgr retry\n");
1155 /* touch each r_stamp for handle_timeout()'s benfit */
1156 list_for_each_entry(req, &osd->o_requests, r_osd_item)
1157 req->r_stamp = jiffies;
1162 ceph_con_close(&osd->o_con);
1163 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1164 osd->o_incarnation++;
1169 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
1171 struct rb_node **p = &osdc->osds.rb_node;
1172 struct rb_node *parent = NULL;
1173 struct ceph_osd *osd = NULL;
1175 dout("__insert_osd %p osd%d\n", new, new->o_osd);
1178 osd = rb_entry(parent, struct ceph_osd, o_node);
1179 if (new->o_osd < osd->o_osd)
1181 else if (new->o_osd > osd->o_osd)
1182 p = &(*p)->rb_right;
1187 rb_link_node(&new->o_node, parent, p);
1188 rb_insert_color(&new->o_node, &osdc->osds);
1191 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
1193 struct ceph_osd *osd;
1194 struct rb_node *n = osdc->osds.rb_node;
1197 osd = rb_entry(n, struct ceph_osd, o_node);
1200 else if (o > osd->o_osd)
1208 static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
1210 schedule_delayed_work(&osdc->timeout_work,
1211 osdc->client->options->osd_keepalive_timeout * HZ);
1214 static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
1216 cancel_delayed_work(&osdc->timeout_work);
1220 * Register request, assign tid. If this is the first request, set up
1221 * the timeout event.
1223 static void __register_request(struct ceph_osd_client *osdc,
1224 struct ceph_osd_request *req)
1226 req->r_tid = ++osdc->last_tid;
1227 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1228 dout("__register_request %p tid %lld\n", req, req->r_tid);
1229 __insert_request(osdc, req);
1230 ceph_osdc_get_request(req);
1231 osdc->num_requests++;
1232 if (osdc->num_requests == 1) {
1233 dout(" first request, scheduling timeout\n");
1234 __schedule_osd_timeout(osdc);
1239 * called under osdc->request_mutex
1241 static void __unregister_request(struct ceph_osd_client *osdc,
1242 struct ceph_osd_request *req)
1244 if (RB_EMPTY_NODE(&req->r_node)) {
1245 dout("__unregister_request %p tid %lld not registered\n",
1250 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1251 rb_erase(&req->r_node, &osdc->requests);
1252 RB_CLEAR_NODE(&req->r_node);
1253 osdc->num_requests--;
1256 /* make sure the original request isn't in flight. */
1257 ceph_msg_revoke(req->r_request);
1259 list_del_init(&req->r_osd_item);
1260 maybe_move_osd_to_lru(osdc, req->r_osd);
1261 if (list_empty(&req->r_linger_osd_item))
1265 list_del_init(&req->r_req_lru_item);
1266 ceph_osdc_put_request(req);
1268 if (osdc->num_requests == 0) {
1269 dout(" no requests, canceling timeout\n");
1270 __cancel_osd_timeout(osdc);
1275 * Cancel a previously queued request message
1277 static void __cancel_request(struct ceph_osd_request *req)
1279 if (req->r_sent && req->r_osd) {
1280 ceph_msg_revoke(req->r_request);
1285 static void __register_linger_request(struct ceph_osd_client *osdc,
1286 struct ceph_osd_request *req)
1288 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1289 WARN_ON(!req->r_linger);
1291 ceph_osdc_get_request(req);
1292 list_add_tail(&req->r_linger_item, &osdc->req_linger);
1294 list_add_tail(&req->r_linger_osd_item,
1295 &req->r_osd->o_linger_requests);
1298 static void __unregister_linger_request(struct ceph_osd_client *osdc,
1299 struct ceph_osd_request *req)
1301 WARN_ON(!req->r_linger);
1303 if (list_empty(&req->r_linger_item)) {
1304 dout("%s %p tid %llu not registered\n", __func__, req,
1309 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
1310 list_del_init(&req->r_linger_item);
1313 list_del_init(&req->r_linger_osd_item);
1314 maybe_move_osd_to_lru(osdc, req->r_osd);
1315 if (list_empty(&req->r_osd_item))
1318 ceph_osdc_put_request(req);
1321 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1322 struct ceph_osd_request *req)
1324 if (!req->r_linger) {
1325 dout("set_request_linger %p\n", req);
1329 EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1332 * Returns whether a request should be blocked from being sent
1333 * based on the current osdmap and osd_client settings.
1335 * Caller should hold map_sem for read.
1337 static bool __req_should_be_paused(struct ceph_osd_client *osdc,
1338 struct ceph_osd_request *req)
1340 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
1341 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
1342 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
1343 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
1344 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
1348 * Calculate mapping of a request to a PG. Takes tiering into account.
1350 static int __calc_request_pg(struct ceph_osdmap *osdmap,
1351 struct ceph_osd_request *req,
1352 struct ceph_pg *pg_out)
1354 bool need_check_tiering;
1356 need_check_tiering = false;
1357 if (req->r_target_oloc.pool == -1) {
1358 req->r_target_oloc = req->r_base_oloc; /* struct */
1359 need_check_tiering = true;
1361 if (req->r_target_oid.name_len == 0) {
1362 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
1363 need_check_tiering = true;
1366 if (need_check_tiering &&
1367 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1368 struct ceph_pg_pool_info *pi;
1370 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
1372 if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1374 req->r_target_oloc.pool = pi->read_tier;
1375 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1376 pi->write_tier >= 0)
1377 req->r_target_oloc.pool = pi->write_tier;
1379 /* !pi is caught in ceph_oloc_oid_to_pg() */
1382 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
1383 &req->r_target_oid, pg_out);
1386 static void __enqueue_request(struct ceph_osd_request *req)
1388 struct ceph_osd_client *osdc = req->r_osdc;
1390 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
1391 req->r_osd ? req->r_osd->o_osd : -1);
1394 __remove_osd_from_lru(req->r_osd);
1395 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1396 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1398 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1403 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1404 * (as needed), and set the request r_osd appropriately. If there is
1405 * no up osd, set r_osd to NULL. Move the request to the appropriate list
1406 * (unsent, homeless) or leave on in-flight lru.
1408 * Return 0 if unchanged, 1 if changed, or negative on error.
1410 * Caller should hold map_sem for read and request_mutex.
1412 static int __map_request(struct ceph_osd_client *osdc,
1413 struct ceph_osd_request *req, int force_resend)
1415 struct ceph_pg pgid;
1416 int acting[CEPH_PG_MAX_SIZE];
1421 dout("map_request %p tid %lld\n", req, req->r_tid);
1423 err = __calc_request_pg(osdc->osdmap, req, &pgid);
1425 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1430 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o);
1434 was_paused = req->r_paused;
1435 req->r_paused = __req_should_be_paused(osdc, req);
1436 if (was_paused && !req->r_paused)
1439 if ((!force_resend &&
1440 req->r_osd && req->r_osd->o_osd == o &&
1441 req->r_sent >= req->r_osd->o_incarnation &&
1442 req->r_num_pg_osds == num &&
1443 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
1444 (req->r_osd == NULL && o == -1) ||
1446 return 0; /* no change */
1448 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1449 req->r_tid, pgid.pool, pgid.seed, o,
1450 req->r_osd ? req->r_osd->o_osd : -1);
1452 /* record full pg acting set */
1453 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1454 req->r_num_pg_osds = num;
1457 __cancel_request(req);
1458 list_del_init(&req->r_osd_item);
1459 list_del_init(&req->r_linger_osd_item);
1463 req->r_osd = __lookup_osd(osdc, o);
1464 if (!req->r_osd && o >= 0) {
1466 req->r_osd = create_osd(osdc, o);
1468 list_move(&req->r_req_lru_item, &osdc->req_notarget);
1472 dout("map_request osd %p is osd%d\n", req->r_osd, o);
1473 __insert_osd(osdc, req->r_osd);
1475 ceph_con_open(&req->r_osd->o_con,
1476 CEPH_ENTITY_TYPE_OSD, o,
1477 &osdc->osdmap->osd_addr[o]);
1480 __enqueue_request(req);
1481 err = 1; /* osd or pg changed */
1488 * caller should hold map_sem (for read) and request_mutex
1490 static void __send_request(struct ceph_osd_client *osdc,
1491 struct ceph_osd_request *req)
1495 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1496 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1497 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1499 /* fill in message content that changes each time we send it */
1500 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1501 put_unaligned_le32(req->r_flags, req->r_request_flags);
1502 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1503 p = req->r_request_pgid;
1504 ceph_encode_64(&p, req->r_pgid.pool);
1505 ceph_encode_32(&p, req->r_pgid.seed);
1506 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1507 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1508 sizeof(req->r_reassert_version));
1510 req->r_stamp = jiffies;
1511 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
1513 ceph_msg_get(req->r_request); /* send consumes a ref */
1515 req->r_sent = req->r_osd->o_incarnation;
1517 ceph_con_send(&req->r_osd->o_con, req->r_request);
1521 * Send any requests in the queue (req_unsent).
1523 static void __send_queued(struct ceph_osd_client *osdc)
1525 struct ceph_osd_request *req, *tmp;
1527 dout("__send_queued\n");
1528 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1529 __send_request(osdc, req);
1533 * Caller should hold map_sem for read and request_mutex.
1535 static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
1536 struct ceph_osd_request *req,
1541 __register_request(osdc, req);
1543 req->r_got_reply = 0;
1544 rc = __map_request(osdc, req, 0);
1547 dout("osdc_start_request failed map, "
1548 " will retry %lld\n", req->r_tid);
1551 __unregister_request(osdc, req);
1556 if (req->r_osd == NULL) {
1557 dout("send_request %p no up osds in pg\n", req);
1558 ceph_monc_request_next_osdmap(&osdc->client->monc);
1560 __send_queued(osdc);
1567 * Timeout callback, called every N seconds when 1 or more osd
1568 * requests has been active for more than N seconds. When this
1569 * happens, we ping all OSDs with requests who have timed out to
1570 * ensure any communications channel reset is detected. Reset the
1571 * request timeouts another N seconds in the future as we go.
1572 * Reschedule the timeout event another N seconds in future (unless
1573 * there are no open requests).
1575 static void handle_timeout(struct work_struct *work)
1577 struct ceph_osd_client *osdc =
1578 container_of(work, struct ceph_osd_client, timeout_work.work);
1579 struct ceph_osd_request *req;
1580 struct ceph_osd *osd;
1581 unsigned long keepalive =
1582 osdc->client->options->osd_keepalive_timeout * HZ;
1583 struct list_head slow_osds;
1585 down_read(&osdc->map_sem);
1587 ceph_monc_request_next_osdmap(&osdc->client->monc);
1589 mutex_lock(&osdc->request_mutex);
1592 * ping osds that are a bit slow. this ensures that if there
1593 * is a break in the TCP connection we will notice, and reopen
1594 * a connection with that osd (from the fault callback).
1596 INIT_LIST_HEAD(&slow_osds);
1597 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
1598 if (time_before(jiffies, req->r_stamp + keepalive))
1603 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1604 req->r_tid, osd->o_osd);
1605 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1607 while (!list_empty(&slow_osds)) {
1608 osd = list_entry(slow_osds.next, struct ceph_osd,
1610 list_del_init(&osd->o_keepalive_item);
1611 ceph_con_keepalive(&osd->o_con);
1614 __schedule_osd_timeout(osdc);
1615 __send_queued(osdc);
1616 mutex_unlock(&osdc->request_mutex);
1617 up_read(&osdc->map_sem);
1620 static void handle_osds_timeout(struct work_struct *work)
1622 struct ceph_osd_client *osdc =
1623 container_of(work, struct ceph_osd_client,
1624 osds_timeout_work.work);
1625 unsigned long delay =
1626 osdc->client->options->osd_idle_ttl * HZ >> 2;
1628 dout("osds timeout\n");
1629 down_read(&osdc->map_sem);
1630 remove_old_osds(osdc);
1631 up_read(&osdc->map_sem);
1633 schedule_delayed_work(&osdc->osds_timeout_work,
1634 round_jiffies_relative(delay));
1637 static int ceph_oloc_decode(void **p, void *end,
1638 struct ceph_object_locator *oloc)
1640 u8 struct_v, struct_cv;
1645 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1646 struct_v = ceph_decode_8(p);
1647 struct_cv = ceph_decode_8(p);
1649 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1650 struct_v, struct_cv);
1653 if (struct_cv > 6) {
1654 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1655 struct_v, struct_cv);
1658 len = ceph_decode_32(p);
1659 ceph_decode_need(p, end, len, e_inval);
1660 struct_end = *p + len;
1662 oloc->pool = ceph_decode_64(p);
1663 *p += 4; /* skip preferred */
1665 len = ceph_decode_32(p);
1667 pr_warn("ceph_object_locator::key is set\n");
1671 if (struct_v >= 5) {
1672 len = ceph_decode_32(p);
1674 pr_warn("ceph_object_locator::nspace is set\n");
1679 if (struct_v >= 6) {
1680 s64 hash = ceph_decode_64(p);
1682 pr_warn("ceph_object_locator::hash is set\n");
1697 static int ceph_redirect_decode(void **p, void *end,
1698 struct ceph_request_redirect *redir)
1700 u8 struct_v, struct_cv;
1705 ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
1706 struct_v = ceph_decode_8(p);
1707 struct_cv = ceph_decode_8(p);
1708 if (struct_cv > 1) {
1709 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1710 struct_v, struct_cv);
1713 len = ceph_decode_32(p);
1714 ceph_decode_need(p, end, len, e_inval);
1715 struct_end = *p + len;
1717 ret = ceph_oloc_decode(p, end, &redir->oloc);
1721 len = ceph_decode_32(p);
1723 pr_warn("ceph_request_redirect::object_name is set\n");
1727 len = ceph_decode_32(p);
1728 *p += len; /* skip osd_instructions */
1740 static void complete_request(struct ceph_osd_request *req)
1742 complete_all(&req->r_safe_completion); /* fsync waiter */
1746 * handle osd op reply. either call the callback if it is specified,
1747 * or do the completion to wake up the waiting thread.
1749 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1750 struct ceph_connection *con)
1753 struct ceph_osd_request *req;
1754 struct ceph_request_redirect redir;
1757 unsigned int numops;
1758 int payload_len, flags;
1764 u64 reassert_version;
1766 int already_completed;
1770 tid = le64_to_cpu(msg->hdr.tid);
1771 dout("handle_reply %p tid %llu\n", msg, tid);
1773 p = msg->front.iov_base;
1774 end = p + msg->front.iov_len;
1776 ceph_decode_need(&p, end, 4, bad);
1777 object_len = ceph_decode_32(&p);
1778 ceph_decode_need(&p, end, object_len, bad);
1781 err = ceph_decode_pgid(&p, end, &pg);
1785 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1786 flags = ceph_decode_64(&p);
1787 result = ceph_decode_32(&p);
1788 reassert_epoch = ceph_decode_32(&p);
1789 reassert_version = ceph_decode_64(&p);
1790 osdmap_epoch = ceph_decode_32(&p);
1793 down_read(&osdc->map_sem);
1794 mutex_lock(&osdc->request_mutex);
1795 req = __lookup_request(osdc, tid);
1797 dout("handle_reply tid %llu dne\n", tid);
1800 ceph_osdc_get_request(req);
1802 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1805 ceph_decode_need(&p, end, 4, bad_put);
1806 numops = ceph_decode_32(&p);
1807 if (numops > CEPH_OSD_MAX_OP)
1809 if (numops != req->r_num_ops)
1812 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1813 for (i = 0; i < numops; i++) {
1814 struct ceph_osd_op *op = p;
1817 len = le32_to_cpu(op->payload_len);
1818 req->r_reply_op_len[i] = len;
1819 dout(" op %d has %d bytes\n", i, len);
1823 bytes = le32_to_cpu(msg->hdr.data_len);
1824 if (payload_len != bytes) {
1825 pr_warn("sum of op payload lens %d != data_len %d\n",
1826 payload_len, bytes);
1830 ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1831 retry_attempt = ceph_decode_32(&p);
1832 for (i = 0; i < numops; i++)
1833 req->r_reply_op_result[i] = ceph_decode_32(&p);
1835 if (le16_to_cpu(msg->hdr.version) >= 6) {
1836 p += 8 + 4; /* skip replay_version */
1837 p += 8; /* skip user_version */
1839 err = ceph_redirect_decode(&p, end, &redir);
1843 redir.oloc.pool = -1;
1846 if (redir.oloc.pool != -1) {
1847 dout("redirect pool %lld\n", redir.oloc.pool);
1849 __unregister_request(osdc, req);
1851 req->r_target_oloc = redir.oloc; /* struct */
1854 * Start redirect requests with nofail=true. If
1855 * mapping fails, request will end up on the notarget
1856 * list, waiting for the new osdmap (which can take
1857 * a while), even though the original request mapped
1858 * successfully. In the future we might want to follow
1859 * original request's nofail setting here.
1861 err = __ceph_osdc_start_request(osdc, req, true);
1867 already_completed = req->r_got_reply;
1868 if (!req->r_got_reply) {
1869 req->r_result = result;
1870 dout("handle_reply result %d bytes %d\n", req->r_result,
1872 if (req->r_result == 0)
1873 req->r_result = bytes;
1875 /* in case this is a write and we need to replay, */
1876 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1877 req->r_reassert_version.version = cpu_to_le64(reassert_version);
1879 req->r_got_reply = 1;
1880 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1881 dout("handle_reply tid %llu dup ack\n", tid);
1885 dout("handle_reply tid %llu flags %d\n", tid, flags);
1887 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1888 __register_linger_request(osdc, req);
1890 /* either this is a read, or we got the safe response */
1892 (flags & CEPH_OSD_FLAG_ONDISK) ||
1893 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1894 __unregister_request(osdc, req);
1896 mutex_unlock(&osdc->request_mutex);
1897 up_read(&osdc->map_sem);
1899 if (!already_completed) {
1900 if (req->r_unsafe_callback &&
1901 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
1902 req->r_unsafe_callback(req, true);
1903 if (req->r_callback)
1904 req->r_callback(req, msg);
1906 complete_all(&req->r_completion);
1909 if (flags & CEPH_OSD_FLAG_ONDISK) {
1910 if (req->r_unsafe_callback && already_completed)
1911 req->r_unsafe_callback(req, false);
1912 complete_request(req);
1916 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
1917 ceph_osdc_put_request(req);
1920 mutex_unlock(&osdc->request_mutex);
1921 up_read(&osdc->map_sem);
1925 req->r_result = -EIO;
1926 __unregister_request(osdc, req);
1927 if (req->r_callback)
1928 req->r_callback(req, msg);
1930 complete_all(&req->r_completion);
1931 complete_request(req);
1932 ceph_osdc_put_request(req);
1934 mutex_unlock(&osdc->request_mutex);
1935 up_read(&osdc->map_sem);
1937 pr_err("corrupt osd_op_reply got %d %d\n",
1938 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1942 static void reset_changed_osds(struct ceph_osd_client *osdc)
1944 struct rb_node *p, *n;
1946 dout("%s %p\n", __func__, osdc);
1947 for (p = rb_first(&osdc->osds); p; p = n) {
1948 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
1951 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1952 memcmp(&osd->o_con.peer_addr,
1953 ceph_osd_addr(osdc->osdmap,
1955 sizeof(struct ceph_entity_addr)) != 0)
1956 __reset_osd(osdc, osd);
1961 * Requeue requests whose mapping to an OSD has changed. If requests map to
1962 * no osd, request a new map.
1964 * Caller should hold map_sem for read.
1966 static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
1967 bool force_resend_writes)
1969 struct ceph_osd_request *req, *nreq;
1973 bool force_resend_req;
1975 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
1976 force_resend_writes ? " (force resend writes)" : "");
1977 mutex_lock(&osdc->request_mutex);
1978 for (p = rb_first(&osdc->requests); p; ) {
1979 req = rb_entry(p, struct ceph_osd_request, r_node);
1983 * For linger requests that have not yet been
1984 * registered, move them to the linger list; they'll
1985 * be sent to the osd in the loop below. Unregister
1986 * the request before re-registering it as a linger
1987 * request to ensure the __map_request() below
1988 * will decide it needs to be sent.
1990 if (req->r_linger && list_empty(&req->r_linger_item)) {
1991 dout("%p tid %llu restart on osd%d\n",
1993 req->r_osd ? req->r_osd->o_osd : -1);
1994 ceph_osdc_get_request(req);
1995 __unregister_request(osdc, req);
1996 __register_linger_request(osdc, req);
1997 ceph_osdc_put_request(req);
2001 force_resend_req = force_resend ||
2002 (force_resend_writes &&
2003 req->r_flags & CEPH_OSD_FLAG_WRITE);
2004 err = __map_request(osdc, req, force_resend_req);
2006 continue; /* error */
2007 if (req->r_osd == NULL) {
2008 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
2009 needmap++; /* request a newer map */
2010 } else if (err > 0) {
2011 if (!req->r_linger) {
2012 dout("%p tid %llu requeued on osd%d\n", req,
2014 req->r_osd ? req->r_osd->o_osd : -1);
2015 req->r_flags |= CEPH_OSD_FLAG_RETRY;
2020 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
2022 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
2024 err = __map_request(osdc, req,
2025 force_resend || force_resend_writes);
2026 dout("__map_request returned %d\n", err);
2028 continue; /* hrm! */
2029 if (req->r_osd == NULL || err > 0) {
2030 if (req->r_osd == NULL) {
2031 dout("lingering %p tid %llu maps to no osd\n",
2034 * A homeless lingering request makes
2035 * no sense, as it's job is to keep
2036 * a particular OSD connection open.
2037 * Request a newer map and kick the
2038 * request, knowing that it won't be
2039 * resent until we actually get a map
2040 * that can tell us where to send it.
2045 dout("kicking lingering %p tid %llu osd%d\n", req,
2046 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1);
2047 __register_request(osdc, req);
2048 __unregister_linger_request(osdc, req);
2051 reset_changed_osds(osdc);
2052 mutex_unlock(&osdc->request_mutex);
2055 dout("%d requests for down osds, need new map\n", needmap);
2056 ceph_monc_request_next_osdmap(&osdc->client->monc);
2062 * Process updated osd map.
2064 * The message contains any number of incremental and full maps, normally
2065 * indicating some sort of topology change in the cluster. Kick requests
2066 * off to different OSDs as needed.
2068 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
2070 void *p, *end, *next;
2071 u32 nr_maps, maplen;
2073 struct ceph_osdmap *newmap = NULL, *oldmap;
2075 struct ceph_fsid fsid;
2078 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
2079 p = msg->front.iov_base;
2080 end = p + msg->front.iov_len;
2083 ceph_decode_need(&p, end, sizeof(fsid), bad);
2084 ceph_decode_copy(&p, &fsid, sizeof(fsid));
2085 if (ceph_check_fsid(osdc->client, &fsid) < 0)
2088 down_write(&osdc->map_sem);
2090 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
2092 /* incremental maps */
2093 ceph_decode_32_safe(&p, end, nr_maps, bad);
2094 dout(" %d inc maps\n", nr_maps);
2095 while (nr_maps > 0) {
2096 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
2097 epoch = ceph_decode_32(&p);
2098 maplen = ceph_decode_32(&p);
2099 ceph_decode_need(&p, end, maplen, bad);
2101 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
2102 dout("applying incremental map %u len %d\n",
2104 newmap = osdmap_apply_incremental(&p, next,
2106 &osdc->client->msgr);
2107 if (IS_ERR(newmap)) {
2108 err = PTR_ERR(newmap);
2112 if (newmap != osdc->osdmap) {
2113 ceph_osdmap_destroy(osdc->osdmap);
2114 osdc->osdmap = newmap;
2116 was_full = was_full ||
2117 ceph_osdmap_flag(osdc->osdmap,
2119 kick_requests(osdc, 0, was_full);
2121 dout("ignoring incremental map %u len %d\n",
2131 ceph_decode_32_safe(&p, end, nr_maps, bad);
2132 dout(" %d full maps\n", nr_maps);
2134 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
2135 epoch = ceph_decode_32(&p);
2136 maplen = ceph_decode_32(&p);
2137 ceph_decode_need(&p, end, maplen, bad);
2139 dout("skipping non-latest full map %u len %d\n",
2141 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
2142 dout("skipping full map %u len %d, "
2143 "older than our %u\n", epoch, maplen,
2144 osdc->osdmap->epoch);
2146 int skipped_map = 0;
2148 dout("taking full map %u len %d\n", epoch, maplen);
2149 newmap = ceph_osdmap_decode(&p, p+maplen);
2150 if (IS_ERR(newmap)) {
2151 err = PTR_ERR(newmap);
2155 oldmap = osdc->osdmap;
2156 osdc->osdmap = newmap;
2158 if (oldmap->epoch + 1 < newmap->epoch)
2160 ceph_osdmap_destroy(oldmap);
2162 was_full = was_full ||
2163 ceph_osdmap_flag(osdc->osdmap,
2165 kick_requests(osdc, skipped_map, was_full);
2174 downgrade_write(&osdc->map_sem);
2175 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
2178 * subscribe to subsequent osdmap updates if full to ensure
2179 * we find out when we are no longer full and stop returning
2182 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
2183 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
2184 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
2185 ceph_monc_request_next_osdmap(&osdc->client->monc);
2187 mutex_lock(&osdc->request_mutex);
2188 __send_queued(osdc);
2189 mutex_unlock(&osdc->request_mutex);
2190 up_read(&osdc->map_sem);
2191 wake_up_all(&osdc->client->auth_wq);
2195 pr_err("osdc handle_map corrupt msg\n");
2197 up_write(&osdc->map_sem);
2201 * watch/notify callback event infrastructure
2203 * These callbacks are used both for watch and notify operations.
2205 static void __release_event(struct kref *kref)
2207 struct ceph_osd_event *event =
2208 container_of(kref, struct ceph_osd_event, kref);
2210 dout("__release_event %p\n", event);
2214 static void get_event(struct ceph_osd_event *event)
2216 kref_get(&event->kref);
2219 void ceph_osdc_put_event(struct ceph_osd_event *event)
2221 kref_put(&event->kref, __release_event);
2223 EXPORT_SYMBOL(ceph_osdc_put_event);
2225 static void __insert_event(struct ceph_osd_client *osdc,
2226 struct ceph_osd_event *new)
2228 struct rb_node **p = &osdc->event_tree.rb_node;
2229 struct rb_node *parent = NULL;
2230 struct ceph_osd_event *event = NULL;
2234 event = rb_entry(parent, struct ceph_osd_event, node);
2235 if (new->cookie < event->cookie)
2237 else if (new->cookie > event->cookie)
2238 p = &(*p)->rb_right;
2243 rb_link_node(&new->node, parent, p);
2244 rb_insert_color(&new->node, &osdc->event_tree);
2247 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
2250 struct rb_node **p = &osdc->event_tree.rb_node;
2251 struct rb_node *parent = NULL;
2252 struct ceph_osd_event *event = NULL;
2256 event = rb_entry(parent, struct ceph_osd_event, node);
2257 if (cookie < event->cookie)
2259 else if (cookie > event->cookie)
2260 p = &(*p)->rb_right;
2267 static void __remove_event(struct ceph_osd_event *event)
2269 struct ceph_osd_client *osdc = event->osdc;
2271 if (!RB_EMPTY_NODE(&event->node)) {
2272 dout("__remove_event removed %p\n", event);
2273 rb_erase(&event->node, &osdc->event_tree);
2274 ceph_osdc_put_event(event);
2276 dout("__remove_event didn't remove %p\n", event);
2280 int ceph_osdc_create_event(struct ceph_osd_client *osdc,
2281 void (*event_cb)(u64, u64, u8, void *),
2282 void *data, struct ceph_osd_event **pevent)
2284 struct ceph_osd_event *event;
2286 event = kmalloc(sizeof(*event), GFP_NOIO);
2290 dout("create_event %p\n", event);
2291 event->cb = event_cb;
2292 event->one_shot = 0;
2295 INIT_LIST_HEAD(&event->osd_node);
2296 RB_CLEAR_NODE(&event->node);
2297 kref_init(&event->kref); /* one ref for us */
2298 kref_get(&event->kref); /* one ref for the caller */
2300 spin_lock(&osdc->event_lock);
2301 event->cookie = ++osdc->event_count;
2302 __insert_event(osdc, event);
2303 spin_unlock(&osdc->event_lock);
2308 EXPORT_SYMBOL(ceph_osdc_create_event);
2310 void ceph_osdc_cancel_event(struct ceph_osd_event *event)
2312 struct ceph_osd_client *osdc = event->osdc;
2314 dout("cancel_event %p\n", event);
2315 spin_lock(&osdc->event_lock);
2316 __remove_event(event);
2317 spin_unlock(&osdc->event_lock);
2318 ceph_osdc_put_event(event); /* caller's */
2320 EXPORT_SYMBOL(ceph_osdc_cancel_event);
2323 static void do_event_work(struct work_struct *work)
2325 struct ceph_osd_event_work *event_work =
2326 container_of(work, struct ceph_osd_event_work, work);
2327 struct ceph_osd_event *event = event_work->event;
2328 u64 ver = event_work->ver;
2329 u64 notify_id = event_work->notify_id;
2330 u8 opcode = event_work->opcode;
2332 dout("do_event_work completing %p\n", event);
2333 event->cb(ver, notify_id, opcode, event->data);
2334 dout("do_event_work completed %p\n", event);
2335 ceph_osdc_put_event(event);
2341 * Process osd watch notifications
2343 static void handle_watch_notify(struct ceph_osd_client *osdc,
2344 struct ceph_msg *msg)
2348 u64 cookie, ver, notify_id;
2350 struct ceph_osd_event *event;
2351 struct ceph_osd_event_work *event_work;
2353 p = msg->front.iov_base;
2354 end = p + msg->front.iov_len;
2356 ceph_decode_8_safe(&p, end, proto_ver, bad);
2357 ceph_decode_8_safe(&p, end, opcode, bad);
2358 ceph_decode_64_safe(&p, end, cookie, bad);
2359 ceph_decode_64_safe(&p, end, ver, bad);
2360 ceph_decode_64_safe(&p, end, notify_id, bad);
2362 spin_lock(&osdc->event_lock);
2363 event = __find_event(osdc, cookie);
2365 BUG_ON(event->one_shot);
2368 spin_unlock(&osdc->event_lock);
2369 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2370 cookie, ver, event);
2372 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
2374 pr_err("couldn't allocate event_work\n");
2375 ceph_osdc_put_event(event);
2378 INIT_WORK(&event_work->work, do_event_work);
2379 event_work->event = event;
2380 event_work->ver = ver;
2381 event_work->notify_id = notify_id;
2382 event_work->opcode = opcode;
2384 queue_work(osdc->notify_wq, &event_work->work);
2390 pr_err("osdc handle_watch_notify corrupt msg\n");
2394 * build new request AND message
2397 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
2398 struct ceph_snap_context *snapc, u64 snap_id,
2399 struct timespec *mtime)
2401 struct ceph_msg *msg = req->r_request;
2404 int flags = req->r_flags;
2408 req->r_snapid = snap_id;
2409 req->r_snapc = ceph_get_snap_context(snapc);
2411 /* encode request */
2412 msg->hdr.version = cpu_to_le16(4);
2414 p = msg->front.iov_base;
2415 ceph_encode_32(&p, 1); /* client_inc is always 1 */
2416 req->r_request_osdmap_epoch = p;
2418 req->r_request_flags = p;
2420 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
2421 ceph_encode_timespec(p, mtime);
2422 p += sizeof(struct ceph_timespec);
2423 req->r_request_reassert_version = p;
2424 p += sizeof(struct ceph_eversion); /* will get filled in */
2427 ceph_encode_8(&p, 4);
2428 ceph_encode_8(&p, 4);
2429 ceph_encode_32(&p, 8 + 4 + 4);
2430 req->r_request_pool = p;
2432 ceph_encode_32(&p, -1); /* preferred */
2433 ceph_encode_32(&p, 0); /* key len */
2435 ceph_encode_8(&p, 1);
2436 req->r_request_pgid = p;
2438 ceph_encode_32(&p, -1); /* preferred */
2441 ceph_encode_32(&p, req->r_base_oid.name_len);
2442 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
2443 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
2444 req->r_base_oid.name, req->r_base_oid.name_len);
2445 p += req->r_base_oid.name_len;
2447 /* ops--can imply data */
2448 ceph_encode_16(&p, (u16)req->r_num_ops);
2450 for (i = 0; i < req->r_num_ops; i++) {
2451 data_len += osd_req_encode_op(req, p, i);
2452 p += sizeof(struct ceph_osd_op);
2456 ceph_encode_64(&p, req->r_snapid);
2457 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
2458 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
2460 for (i = 0; i < snapc->num_snaps; i++) {
2461 ceph_encode_64(&p, req->r_snapc->snaps[i]);
2465 req->r_request_attempts = p;
2469 if (flags & CEPH_OSD_FLAG_WRITE) {
2473 * The header "data_off" is a hint to the receiver
2474 * allowing it to align received data into its
2475 * buffers such that there's no need to re-copy
2476 * it before writing it to disk (direct I/O).
2478 data_off = (u16) (off & 0xffff);
2479 req->r_request->hdr.data_off = cpu_to_le16(data_off);
2481 req->r_request->hdr.data_len = cpu_to_le32(data_len);
2483 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
2484 msg_size = p - msg->front.iov_base;
2485 msg->front.iov_len = msg_size;
2486 msg->hdr.front_len = cpu_to_le32(msg_size);
2488 dout("build_request msg_size was %d\n", (int)msg_size);
2490 EXPORT_SYMBOL(ceph_osdc_build_request);
2493 * Register request, send initial attempt.
2495 int ceph_osdc_start_request(struct ceph_osd_client *osdc,
2496 struct ceph_osd_request *req,
2501 down_read(&osdc->map_sem);
2502 mutex_lock(&osdc->request_mutex);
2504 rc = __ceph_osdc_start_request(osdc, req, nofail);
2506 mutex_unlock(&osdc->request_mutex);
2507 up_read(&osdc->map_sem);
2511 EXPORT_SYMBOL(ceph_osdc_start_request);
2514 * Unregister a registered request. The request is not completed (i.e.
2515 * no callbacks or wakeups) - higher layers are supposed to know what
2516 * they are canceling.
2518 void ceph_osdc_cancel_request(struct ceph_osd_request *req)
2520 struct ceph_osd_client *osdc = req->r_osdc;
2522 mutex_lock(&osdc->request_mutex);
2524 __unregister_linger_request(osdc, req);
2525 __unregister_request(osdc, req);
2526 mutex_unlock(&osdc->request_mutex);
2528 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
2530 EXPORT_SYMBOL(ceph_osdc_cancel_request);
2533 * wait for a request to complete
2535 int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
2536 struct ceph_osd_request *req)
2540 dout("%s %p tid %llu\n", __func__, req, req->r_tid);
2542 rc = wait_for_completion_interruptible(&req->r_completion);
2544 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
2545 ceph_osdc_cancel_request(req);
2546 complete_request(req);
2550 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
2552 return req->r_result;
2554 EXPORT_SYMBOL(ceph_osdc_wait_request);
2557 * sync - wait for all in-flight requests to flush. avoid starvation.
2559 void ceph_osdc_sync(struct ceph_osd_client *osdc)
2561 struct ceph_osd_request *req;
2562 u64 last_tid, next_tid = 0;
2564 mutex_lock(&osdc->request_mutex);
2565 last_tid = osdc->last_tid;
2567 req = __lookup_request_ge(osdc, next_tid);
2570 if (req->r_tid > last_tid)
2573 next_tid = req->r_tid + 1;
2574 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
2577 ceph_osdc_get_request(req);
2578 mutex_unlock(&osdc->request_mutex);
2579 dout("sync waiting on tid %llu (last is %llu)\n",
2580 req->r_tid, last_tid);
2581 wait_for_completion(&req->r_safe_completion);
2582 mutex_lock(&osdc->request_mutex);
2583 ceph_osdc_put_request(req);
2585 mutex_unlock(&osdc->request_mutex);
2586 dout("sync done (thru tid %llu)\n", last_tid);
2588 EXPORT_SYMBOL(ceph_osdc_sync);
2591 * Call all pending notify callbacks - for use after a watch is
2592 * unregistered, to make sure no more callbacks for it will be invoked
2594 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2596 flush_workqueue(osdc->notify_wq);
2598 EXPORT_SYMBOL(ceph_osdc_flush_notifies);
2604 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2609 osdc->client = client;
2610 osdc->osdmap = NULL;
2611 init_rwsem(&osdc->map_sem);
2612 init_completion(&osdc->map_waiters);
2613 osdc->last_requested_map = 0;
2614 mutex_init(&osdc->request_mutex);
2616 osdc->osds = RB_ROOT;
2617 INIT_LIST_HEAD(&osdc->osd_lru);
2618 osdc->requests = RB_ROOT;
2619 INIT_LIST_HEAD(&osdc->req_lru);
2620 INIT_LIST_HEAD(&osdc->req_unsent);
2621 INIT_LIST_HEAD(&osdc->req_notarget);
2622 INIT_LIST_HEAD(&osdc->req_linger);
2623 osdc->num_requests = 0;
2624 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2625 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2626 spin_lock_init(&osdc->event_lock);
2627 osdc->event_tree = RB_ROOT;
2628 osdc->event_count = 0;
2630 schedule_delayed_work(&osdc->osds_timeout_work,
2631 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
2634 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2635 sizeof(struct ceph_osd_request));
2636 if (!osdc->req_mempool)
2639 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2640 OSD_OP_FRONT_LEN, 10, true,
2644 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2645 OSD_OPREPLY_FRONT_LEN, 10, true,
2651 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2652 if (!osdc->notify_wq)
2653 goto out_msgpool_reply;
2658 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2660 ceph_msgpool_destroy(&osdc->msgpool_op);
2662 mempool_destroy(osdc->req_mempool);
2667 void ceph_osdc_stop(struct ceph_osd_client *osdc)
2669 flush_workqueue(osdc->notify_wq);
2670 destroy_workqueue(osdc->notify_wq);
2671 cancel_delayed_work_sync(&osdc->timeout_work);
2672 cancel_delayed_work_sync(&osdc->osds_timeout_work);
2674 ceph_osdmap_destroy(osdc->osdmap);
2675 osdc->osdmap = NULL;
2677 remove_all_osds(osdc);
2678 mempool_destroy(osdc->req_mempool);
2679 ceph_msgpool_destroy(&osdc->msgpool_op);
2680 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
2684 * Read some contiguous pages. If we cross a stripe boundary, shorten
2685 * *plen. Return number of bytes read, or error.
2687 int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2688 struct ceph_vino vino, struct ceph_file_layout *layout,
2690 u32 truncate_seq, u64 truncate_size,
2691 struct page **pages, int num_pages, int page_align)
2693 struct ceph_osd_request *req;
2696 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2697 vino.snap, off, *plen);
2698 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
2699 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2700 NULL, truncate_seq, truncate_size,
2703 return PTR_ERR(req);
2705 /* it may be a short read due to an object boundary */
2707 osd_req_op_extent_osd_data_pages(req, 0,
2708 pages, *plen, page_align, false, false);
2710 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
2711 off, *plen, *plen, page_align);
2713 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2715 rc = ceph_osdc_start_request(osdc, req, false);
2717 rc = ceph_osdc_wait_request(osdc, req);
2719 ceph_osdc_put_request(req);
2720 dout("readpages result %d\n", rc);
2723 EXPORT_SYMBOL(ceph_osdc_readpages);
2726 * do a synchronous write on N pages
2728 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2729 struct ceph_file_layout *layout,
2730 struct ceph_snap_context *snapc,
2732 u32 truncate_seq, u64 truncate_size,
2733 struct timespec *mtime,
2734 struct page **pages, int num_pages)
2736 struct ceph_osd_request *req;
2738 int page_align = off & ~PAGE_MASK;
2740 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
2741 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
2743 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2744 snapc, truncate_seq, truncate_size,
2747 return PTR_ERR(req);
2749 /* it may be a short write due to an object boundary */
2750 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2752 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
2754 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2756 rc = ceph_osdc_start_request(osdc, req, true);
2758 rc = ceph_osdc_wait_request(osdc, req);
2760 ceph_osdc_put_request(req);
2763 dout("writepages result %d\n", rc);
2766 EXPORT_SYMBOL(ceph_osdc_writepages);
2768 int ceph_osdc_setup(void)
2770 BUG_ON(ceph_osd_request_cache);
2771 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
2772 sizeof (struct ceph_osd_request),
2773 __alignof__(struct ceph_osd_request),
2776 return ceph_osd_request_cache ? 0 : -ENOMEM;
2778 EXPORT_SYMBOL(ceph_osdc_setup);
2780 void ceph_osdc_cleanup(void)
2782 BUG_ON(!ceph_osd_request_cache);
2783 kmem_cache_destroy(ceph_osd_request_cache);
2784 ceph_osd_request_cache = NULL;
2786 EXPORT_SYMBOL(ceph_osdc_cleanup);
2789 * handle incoming message
2791 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2793 struct ceph_osd *osd = con->private;
2794 struct ceph_osd_client *osdc;
2795 int type = le16_to_cpu(msg->hdr.type);
2802 case CEPH_MSG_OSD_MAP:
2803 ceph_osdc_handle_map(osdc, msg);
2805 case CEPH_MSG_OSD_OPREPLY:
2806 handle_reply(osdc, msg, con);
2808 case CEPH_MSG_WATCH_NOTIFY:
2809 handle_watch_notify(osdc, msg);
2813 pr_err("received unknown message type %d %s\n", type,
2814 ceph_msg_type_name(type));
2821 * lookup and return message for incoming reply. set up reply message
2824 static struct ceph_msg *get_reply(struct ceph_connection *con,
2825 struct ceph_msg_header *hdr,
2828 struct ceph_osd *osd = con->private;
2829 struct ceph_osd_client *osdc = osd->o_osdc;
2831 struct ceph_osd_request *req;
2832 int front_len = le32_to_cpu(hdr->front_len);
2833 int data_len = le32_to_cpu(hdr->data_len);
2836 tid = le64_to_cpu(hdr->tid);
2837 mutex_lock(&osdc->request_mutex);
2838 req = __lookup_request(osdc, tid);
2842 dout("get_reply unknown tid %llu from osd%d\n", tid,
2847 if (req->r_reply->con)
2848 dout("%s revoking msg %p from old con %p\n", __func__,
2849 req->r_reply, req->r_reply->con);
2850 ceph_msg_revoke_incoming(req->r_reply);
2852 if (front_len > req->r_reply->front_alloc_len) {
2853 pr_warn("get_reply front %d > preallocated %d (%u#%llu)\n",
2854 front_len, req->r_reply->front_alloc_len,
2855 (unsigned int)con->peer_name.type,
2856 le64_to_cpu(con->peer_name.num));
2857 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
2861 ceph_msg_put(req->r_reply);
2864 m = ceph_msg_get(req->r_reply);
2867 struct ceph_osd_data *osd_data;
2870 * XXX This is assuming there is only one op containing
2871 * XXX page data. Probably OK for reads, but this
2872 * XXX ought to be done more generally.
2874 osd_data = osd_req_op_extent_osd_data(req, 0);
2875 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
2876 if (osd_data->pages &&
2877 unlikely(osd_data->length < data_len)) {
2879 pr_warn("tid %lld reply has %d bytes we had only %llu bytes ready\n",
2880 tid, data_len, osd_data->length);
2889 dout("get_reply tid %lld %p\n", tid, m);
2892 mutex_unlock(&osdc->request_mutex);
2897 static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2898 struct ceph_msg_header *hdr,
2901 struct ceph_osd *osd = con->private;
2902 int type = le16_to_cpu(hdr->type);
2903 int front = le32_to_cpu(hdr->front_len);
2907 case CEPH_MSG_OSD_MAP:
2908 case CEPH_MSG_WATCH_NOTIFY:
2909 return ceph_msg_new(type, front, GFP_NOFS, false);
2910 case CEPH_MSG_OSD_OPREPLY:
2911 return get_reply(con, hdr, skip);
2913 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2921 * Wrappers to refcount containing ceph_osd struct
2923 static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2925 struct ceph_osd *osd = con->private;
2931 static void put_osd_con(struct ceph_connection *con)
2933 struct ceph_osd *osd = con->private;
2941 * Note: returned pointer is the address of a structure that's
2942 * managed separately. Caller must *not* attempt to free it.
2944 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
2945 int *proto, int force_new)
2947 struct ceph_osd *o = con->private;
2948 struct ceph_osd_client *osdc = o->o_osdc;
2949 struct ceph_auth_client *ac = osdc->client->monc.auth;
2950 struct ceph_auth_handshake *auth = &o->o_auth;
2952 if (force_new && auth->authorizer) {
2953 ceph_auth_destroy_authorizer(ac, auth->authorizer);
2954 auth->authorizer = NULL;
2956 if (!auth->authorizer) {
2957 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2960 return ERR_PTR(ret);
2962 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2965 return ERR_PTR(ret);
2967 *proto = ac->protocol;
2973 static int verify_authorizer_reply(struct ceph_connection *con, int len)
2975 struct ceph_osd *o = con->private;
2976 struct ceph_osd_client *osdc = o->o_osdc;
2977 struct ceph_auth_client *ac = osdc->client->monc.auth;
2979 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2982 static int invalidate_authorizer(struct ceph_connection *con)
2984 struct ceph_osd *o = con->private;
2985 struct ceph_osd_client *osdc = o->o_osdc;
2986 struct ceph_auth_client *ac = osdc->client->monc.auth;
2988 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2989 return ceph_monc_validate_auth(&osdc->client->monc);
2992 static int sign_message(struct ceph_connection *con, struct ceph_msg *msg)
2994 struct ceph_osd *o = con->private;
2995 struct ceph_auth_handshake *auth = &o->o_auth;
2996 return ceph_auth_sign_message(auth, msg);
2999 static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg)
3001 struct ceph_osd *o = con->private;
3002 struct ceph_auth_handshake *auth = &o->o_auth;
3003 return ceph_auth_check_message_signature(auth, msg);
3006 static const struct ceph_connection_operations osd_con_ops = {
3009 .dispatch = dispatch,
3010 .get_authorizer = get_authorizer,
3011 .verify_authorizer_reply = verify_authorizer_reply,
3012 .invalidate_authorizer = invalidate_authorizer,
3013 .alloc_msg = alloc_msg,
3014 .sign_message = sign_message,
3015 .check_message_signature = check_message_signature,