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 + CEPH_MAX_OID_NAME_LEN
; /* oid */
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 req
->r_base_oloc
.pool
= -1;
372 req
->r_target_oloc
.pool
= -1;
374 /* create reply message */
376 msg
= ceph_msgpool_get(&osdc
->msgpool_op_reply
, 0);
378 msg
= ceph_msg_new(CEPH_MSG_OSD_OPREPLY
,
379 OSD_OPREPLY_FRONT_LEN
, gfp_flags
, true);
381 ceph_osdc_put_request(req
);
386 /* create request message; allow space for oid */
388 msg
= ceph_msgpool_get(&osdc
->msgpool_op
, 0);
390 msg
= ceph_msg_new(CEPH_MSG_OSD_OP
, msg_size
, gfp_flags
, true);
392 ceph_osdc_put_request(req
);
396 memset(msg
->front
.iov_base
, 0, msg
->front
.iov_len
);
398 req
->r_request
= msg
;
402 EXPORT_SYMBOL(ceph_osdc_alloc_request
);
404 static bool osd_req_opcode_valid(u16 opcode
)
407 case CEPH_OSD_OP_READ
:
408 case CEPH_OSD_OP_STAT
:
409 case CEPH_OSD_OP_MAPEXT
:
410 case CEPH_OSD_OP_MASKTRUNC
:
411 case CEPH_OSD_OP_SPARSE_READ
:
412 case CEPH_OSD_OP_NOTIFY
:
413 case CEPH_OSD_OP_NOTIFY_ACK
:
414 case CEPH_OSD_OP_ASSERT_VER
:
415 case CEPH_OSD_OP_WRITE
:
416 case CEPH_OSD_OP_WRITEFULL
:
417 case CEPH_OSD_OP_TRUNCATE
:
418 case CEPH_OSD_OP_ZERO
:
419 case CEPH_OSD_OP_DELETE
:
420 case CEPH_OSD_OP_APPEND
:
421 case CEPH_OSD_OP_STARTSYNC
:
422 case CEPH_OSD_OP_SETTRUNC
:
423 case CEPH_OSD_OP_TRIMTRUNC
:
424 case CEPH_OSD_OP_TMAPUP
:
425 case CEPH_OSD_OP_TMAPPUT
:
426 case CEPH_OSD_OP_TMAPGET
:
427 case CEPH_OSD_OP_CREATE
:
428 case CEPH_OSD_OP_ROLLBACK
:
429 case CEPH_OSD_OP_WATCH
:
430 case CEPH_OSD_OP_OMAPGETKEYS
:
431 case CEPH_OSD_OP_OMAPGETVALS
:
432 case CEPH_OSD_OP_OMAPGETHEADER
:
433 case CEPH_OSD_OP_OMAPGETVALSBYKEYS
:
434 case CEPH_OSD_OP_OMAPSETVALS
:
435 case CEPH_OSD_OP_OMAPSETHEADER
:
436 case CEPH_OSD_OP_OMAPCLEAR
:
437 case CEPH_OSD_OP_OMAPRMKEYS
:
438 case CEPH_OSD_OP_OMAP_CMP
:
439 case CEPH_OSD_OP_CLONERANGE
:
440 case CEPH_OSD_OP_ASSERT_SRC_VERSION
:
441 case CEPH_OSD_OP_SRC_CMPXATTR
:
442 case CEPH_OSD_OP_GETXATTR
:
443 case CEPH_OSD_OP_GETXATTRS
:
444 case CEPH_OSD_OP_CMPXATTR
:
445 case CEPH_OSD_OP_SETXATTR
:
446 case CEPH_OSD_OP_SETXATTRS
:
447 case CEPH_OSD_OP_RESETXATTRS
:
448 case CEPH_OSD_OP_RMXATTR
:
449 case CEPH_OSD_OP_PULL
:
450 case CEPH_OSD_OP_PUSH
:
451 case CEPH_OSD_OP_BALANCEREADS
:
452 case CEPH_OSD_OP_UNBALANCEREADS
:
453 case CEPH_OSD_OP_SCRUB
:
454 case CEPH_OSD_OP_SCRUB_RESERVE
:
455 case CEPH_OSD_OP_SCRUB_UNRESERVE
:
456 case CEPH_OSD_OP_SCRUB_STOP
:
457 case CEPH_OSD_OP_SCRUB_MAP
:
458 case CEPH_OSD_OP_WRLOCK
:
459 case CEPH_OSD_OP_WRUNLOCK
:
460 case CEPH_OSD_OP_RDLOCK
:
461 case CEPH_OSD_OP_RDUNLOCK
:
462 case CEPH_OSD_OP_UPLOCK
:
463 case CEPH_OSD_OP_DNLOCK
:
464 case CEPH_OSD_OP_CALL
:
465 case CEPH_OSD_OP_PGLS
:
466 case CEPH_OSD_OP_PGLS_FILTER
:
474 * This is an osd op init function for opcodes that have no data or
475 * other information associated with them. It also serves as a
476 * common init routine for all the other init functions, below.
478 static struct ceph_osd_req_op
*
479 _osd_req_op_init(struct ceph_osd_request
*osd_req
, unsigned int which
,
482 struct ceph_osd_req_op
*op
;
484 BUG_ON(which
>= osd_req
->r_num_ops
);
485 BUG_ON(!osd_req_opcode_valid(opcode
));
487 op
= &osd_req
->r_ops
[which
];
488 memset(op
, 0, sizeof (*op
));
494 void osd_req_op_init(struct ceph_osd_request
*osd_req
,
495 unsigned int which
, u16 opcode
)
497 (void)_osd_req_op_init(osd_req
, which
, opcode
);
499 EXPORT_SYMBOL(osd_req_op_init
);
501 void osd_req_op_extent_init(struct ceph_osd_request
*osd_req
,
502 unsigned int which
, u16 opcode
,
503 u64 offset
, u64 length
,
504 u64 truncate_size
, u32 truncate_seq
)
506 struct ceph_osd_req_op
*op
= _osd_req_op_init(osd_req
, which
, opcode
);
507 size_t payload_len
= 0;
509 BUG_ON(opcode
!= CEPH_OSD_OP_READ
&& opcode
!= CEPH_OSD_OP_WRITE
&&
510 opcode
!= CEPH_OSD_OP_DELETE
&& opcode
!= CEPH_OSD_OP_ZERO
&&
511 opcode
!= CEPH_OSD_OP_TRUNCATE
);
513 op
->extent
.offset
= offset
;
514 op
->extent
.length
= length
;
515 op
->extent
.truncate_size
= truncate_size
;
516 op
->extent
.truncate_seq
= truncate_seq
;
517 if (opcode
== CEPH_OSD_OP_WRITE
)
518 payload_len
+= length
;
520 op
->payload_len
= payload_len
;
522 EXPORT_SYMBOL(osd_req_op_extent_init
);
524 void osd_req_op_extent_update(struct ceph_osd_request
*osd_req
,
525 unsigned int which
, u64 length
)
527 struct ceph_osd_req_op
*op
;
530 BUG_ON(which
>= osd_req
->r_num_ops
);
531 op
= &osd_req
->r_ops
[which
];
532 previous
= op
->extent
.length
;
534 if (length
== previous
)
535 return; /* Nothing to do */
536 BUG_ON(length
> previous
);
538 op
->extent
.length
= length
;
539 op
->payload_len
-= previous
- length
;
541 EXPORT_SYMBOL(osd_req_op_extent_update
);
543 void osd_req_op_cls_init(struct ceph_osd_request
*osd_req
, unsigned int which
,
544 u16 opcode
, const char *class, const char *method
)
546 struct ceph_osd_req_op
*op
= _osd_req_op_init(osd_req
, which
, opcode
);
547 struct ceph_pagelist
*pagelist
;
548 size_t payload_len
= 0;
551 BUG_ON(opcode
!= CEPH_OSD_OP_CALL
);
553 pagelist
= kmalloc(sizeof (*pagelist
), GFP_NOFS
);
555 ceph_pagelist_init(pagelist
);
557 op
->cls
.class_name
= class;
558 size
= strlen(class);
559 BUG_ON(size
> (size_t) U8_MAX
);
560 op
->cls
.class_len
= size
;
561 ceph_pagelist_append(pagelist
, class, size
);
564 op
->cls
.method_name
= method
;
565 size
= strlen(method
);
566 BUG_ON(size
> (size_t) U8_MAX
);
567 op
->cls
.method_len
= size
;
568 ceph_pagelist_append(pagelist
, method
, size
);
571 osd_req_op_cls_request_info_pagelist(osd_req
, which
, pagelist
);
573 op
->cls
.argc
= 0; /* currently unused */
575 op
->payload_len
= payload_len
;
577 EXPORT_SYMBOL(osd_req_op_cls_init
);
579 void osd_req_op_watch_init(struct ceph_osd_request
*osd_req
,
580 unsigned int which
, u16 opcode
,
581 u64 cookie
, u64 version
, int flag
)
583 struct ceph_osd_req_op
*op
= _osd_req_op_init(osd_req
, which
, opcode
);
585 BUG_ON(opcode
!= CEPH_OSD_OP_NOTIFY_ACK
&& opcode
!= CEPH_OSD_OP_WATCH
);
587 op
->watch
.cookie
= cookie
;
588 op
->watch
.ver
= version
;
589 if (opcode
== CEPH_OSD_OP_WATCH
&& flag
)
590 op
->watch
.flag
= (u8
)1;
592 EXPORT_SYMBOL(osd_req_op_watch_init
);
594 static void ceph_osdc_msg_data_add(struct ceph_msg
*msg
,
595 struct ceph_osd_data
*osd_data
)
597 u64 length
= ceph_osd_data_length(osd_data
);
599 if (osd_data
->type
== CEPH_OSD_DATA_TYPE_PAGES
) {
600 BUG_ON(length
> (u64
) SIZE_MAX
);
602 ceph_msg_data_add_pages(msg
, osd_data
->pages
,
603 length
, osd_data
->alignment
);
604 } else if (osd_data
->type
== CEPH_OSD_DATA_TYPE_PAGELIST
) {
606 ceph_msg_data_add_pagelist(msg
, osd_data
->pagelist
);
608 } else if (osd_data
->type
== CEPH_OSD_DATA_TYPE_BIO
) {
609 ceph_msg_data_add_bio(msg
, osd_data
->bio
, length
);
612 BUG_ON(osd_data
->type
!= CEPH_OSD_DATA_TYPE_NONE
);
616 static u64
osd_req_encode_op(struct ceph_osd_request
*req
,
617 struct ceph_osd_op
*dst
, unsigned int which
)
619 struct ceph_osd_req_op
*src
;
620 struct ceph_osd_data
*osd_data
;
621 u64 request_data_len
= 0;
624 BUG_ON(which
>= req
->r_num_ops
);
625 src
= &req
->r_ops
[which
];
626 if (WARN_ON(!osd_req_opcode_valid(src
->op
))) {
627 pr_err("unrecognized osd opcode %d\n", src
->op
);
633 case CEPH_OSD_OP_STAT
:
634 osd_data
= &src
->raw_data_in
;
635 ceph_osdc_msg_data_add(req
->r_reply
, osd_data
);
637 case CEPH_OSD_OP_READ
:
638 case CEPH_OSD_OP_WRITE
:
639 case CEPH_OSD_OP_ZERO
:
640 case CEPH_OSD_OP_DELETE
:
641 case CEPH_OSD_OP_TRUNCATE
:
642 if (src
->op
== CEPH_OSD_OP_WRITE
)
643 request_data_len
= src
->extent
.length
;
644 dst
->extent
.offset
= cpu_to_le64(src
->extent
.offset
);
645 dst
->extent
.length
= cpu_to_le64(src
->extent
.length
);
646 dst
->extent
.truncate_size
=
647 cpu_to_le64(src
->extent
.truncate_size
);
648 dst
->extent
.truncate_seq
=
649 cpu_to_le32(src
->extent
.truncate_seq
);
650 osd_data
= &src
->extent
.osd_data
;
651 if (src
->op
== CEPH_OSD_OP_WRITE
)
652 ceph_osdc_msg_data_add(req
->r_request
, osd_data
);
654 ceph_osdc_msg_data_add(req
->r_reply
, osd_data
);
656 case CEPH_OSD_OP_CALL
:
657 dst
->cls
.class_len
= src
->cls
.class_len
;
658 dst
->cls
.method_len
= src
->cls
.method_len
;
659 osd_data
= &src
->cls
.request_info
;
660 ceph_osdc_msg_data_add(req
->r_request
, osd_data
);
661 BUG_ON(osd_data
->type
!= CEPH_OSD_DATA_TYPE_PAGELIST
);
662 request_data_len
= osd_data
->pagelist
->length
;
664 osd_data
= &src
->cls
.request_data
;
665 data_length
= ceph_osd_data_length(osd_data
);
667 BUG_ON(osd_data
->type
== CEPH_OSD_DATA_TYPE_NONE
);
668 dst
->cls
.indata_len
= cpu_to_le32(data_length
);
669 ceph_osdc_msg_data_add(req
->r_request
, osd_data
);
670 src
->payload_len
+= data_length
;
671 request_data_len
+= data_length
;
673 osd_data
= &src
->cls
.response_data
;
674 ceph_osdc_msg_data_add(req
->r_reply
, osd_data
);
676 case CEPH_OSD_OP_STARTSYNC
:
678 case CEPH_OSD_OP_NOTIFY_ACK
:
679 case CEPH_OSD_OP_WATCH
:
680 dst
->watch
.cookie
= cpu_to_le64(src
->watch
.cookie
);
681 dst
->watch
.ver
= cpu_to_le64(src
->watch
.ver
);
682 dst
->watch
.flag
= src
->watch
.flag
;
685 pr_err("unsupported osd opcode %s\n",
686 ceph_osd_op_name(src
->op
));
691 dst
->op
= cpu_to_le16(src
->op
);
692 dst
->payload_len
= cpu_to_le32(src
->payload_len
);
694 return request_data_len
;
698 * build new request AND message, calculate layout, and adjust file
701 * if the file was recently truncated, we include information about its
702 * old and new size so that the object can be updated appropriately. (we
703 * avoid synchronously deleting truncated objects because it's slow.)
705 * if @do_sync, include a 'startsync' command so that the osd will flush
708 struct ceph_osd_request
*ceph_osdc_new_request(struct ceph_osd_client
*osdc
,
709 struct ceph_file_layout
*layout
,
710 struct ceph_vino vino
,
711 u64 off
, u64
*plen
, int num_ops
,
712 int opcode
, int flags
,
713 struct ceph_snap_context
*snapc
,
718 struct ceph_osd_request
*req
;
726 BUG_ON(opcode
!= CEPH_OSD_OP_READ
&& opcode
!= CEPH_OSD_OP_WRITE
&&
727 opcode
!= CEPH_OSD_OP_DELETE
&& opcode
!= CEPH_OSD_OP_ZERO
&&
728 opcode
!= CEPH_OSD_OP_TRUNCATE
);
730 req
= ceph_osdc_alloc_request(osdc
, snapc
, num_ops
, use_mempool
,
733 return ERR_PTR(-ENOMEM
);
735 req
->r_flags
= flags
;
737 /* calculate max write size */
738 r
= calc_layout(layout
, off
, plen
, &objnum
, &objoff
, &objlen
);
740 ceph_osdc_put_request(req
);
744 object_size
= le32_to_cpu(layout
->fl_object_size
);
745 object_base
= off
- objoff
;
746 if (!(truncate_seq
== 1 && truncate_size
== -1ULL)) {
747 if (truncate_size
<= object_base
) {
750 truncate_size
-= object_base
;
751 if (truncate_size
> object_size
)
752 truncate_size
= object_size
;
756 osd_req_op_extent_init(req
, 0, opcode
, objoff
, objlen
,
757 truncate_size
, truncate_seq
);
760 * A second op in the ops array means the caller wants to
761 * also issue a include a 'startsync' command so that the
762 * osd will flush data quickly.
765 osd_req_op_init(req
, 1, CEPH_OSD_OP_STARTSYNC
);
767 req
->r_base_oloc
.pool
= ceph_file_layout_pg_pool(*layout
);
769 snprintf(req
->r_base_oid
.name
, sizeof(req
->r_base_oid
.name
),
770 "%llx.%08llx", vino
.ino
, objnum
);
771 req
->r_base_oid
.name_len
= strlen(req
->r_base_oid
.name
);
775 EXPORT_SYMBOL(ceph_osdc_new_request
);
778 * We keep osd requests in an rbtree, sorted by ->r_tid.
780 static void __insert_request(struct ceph_osd_client
*osdc
,
781 struct ceph_osd_request
*new)
783 struct rb_node
**p
= &osdc
->requests
.rb_node
;
784 struct rb_node
*parent
= NULL
;
785 struct ceph_osd_request
*req
= NULL
;
789 req
= rb_entry(parent
, struct ceph_osd_request
, r_node
);
790 if (new->r_tid
< req
->r_tid
)
792 else if (new->r_tid
> req
->r_tid
)
798 rb_link_node(&new->r_node
, parent
, p
);
799 rb_insert_color(&new->r_node
, &osdc
->requests
);
802 static struct ceph_osd_request
*__lookup_request(struct ceph_osd_client
*osdc
,
805 struct ceph_osd_request
*req
;
806 struct rb_node
*n
= osdc
->requests
.rb_node
;
809 req
= rb_entry(n
, struct ceph_osd_request
, r_node
);
810 if (tid
< req
->r_tid
)
812 else if (tid
> req
->r_tid
)
820 static struct ceph_osd_request
*
821 __lookup_request_ge(struct ceph_osd_client
*osdc
,
824 struct ceph_osd_request
*req
;
825 struct rb_node
*n
= osdc
->requests
.rb_node
;
828 req
= rb_entry(n
, struct ceph_osd_request
, r_node
);
829 if (tid
< req
->r_tid
) {
833 } else if (tid
> req
->r_tid
) {
843 * Resubmit requests pending on the given osd.
845 static void __kick_osd_requests(struct ceph_osd_client
*osdc
,
846 struct ceph_osd
*osd
)
848 struct ceph_osd_request
*req
, *nreq
;
852 dout("__kick_osd_requests osd%d\n", osd
->o_osd
);
853 err
= __reset_osd(osdc
, osd
);
857 * Build up a list of requests to resend by traversing the
858 * osd's list of requests. Requests for a given object are
859 * sent in tid order, and that is also the order they're
860 * kept on this list. Therefore all requests that are in
861 * flight will be found first, followed by all requests that
862 * have not yet been sent. And to resend requests while
863 * preserving this order we will want to put any sent
864 * requests back on the front of the osd client's unsent
867 * So we build a separate ordered list of already-sent
868 * requests for the affected osd and splice it onto the
869 * front of the osd client's unsent list. Once we've seen a
870 * request that has not yet been sent we're done. Those
871 * requests are already sitting right where they belong.
873 list_for_each_entry(req
, &osd
->o_requests
, r_osd_item
) {
876 list_move_tail(&req
->r_req_lru_item
, &resend
);
877 dout("requeueing %p tid %llu osd%d\n", req
, req
->r_tid
,
880 req
->r_flags
|= CEPH_OSD_FLAG_RETRY
;
882 list_splice(&resend
, &osdc
->req_unsent
);
885 * Linger requests are re-registered before sending, which
886 * sets up a new tid for each. We add them to the unsent
887 * list at the end to keep things in tid order.
889 list_for_each_entry_safe(req
, nreq
, &osd
->o_linger_requests
,
892 * reregister request prior to unregistering linger so
893 * that r_osd is preserved.
895 BUG_ON(!list_empty(&req
->r_req_lru_item
));
896 __register_request(osdc
, req
);
897 list_add_tail(&req
->r_req_lru_item
, &osdc
->req_unsent
);
898 list_add_tail(&req
->r_osd_item
, &req
->r_osd
->o_requests
);
899 __unregister_linger_request(osdc
, req
);
900 dout("requeued lingering %p tid %llu osd%d\n", req
, req
->r_tid
,
906 * If the osd connection drops, we need to resubmit all requests.
908 static void osd_reset(struct ceph_connection
*con
)
910 struct ceph_osd
*osd
= con
->private;
911 struct ceph_osd_client
*osdc
;
915 dout("osd_reset osd%d\n", osd
->o_osd
);
917 down_read(&osdc
->map_sem
);
918 mutex_lock(&osdc
->request_mutex
);
919 __kick_osd_requests(osdc
, osd
);
921 mutex_unlock(&osdc
->request_mutex
);
922 up_read(&osdc
->map_sem
);
926 * Track open sessions with osds.
928 static struct ceph_osd
*create_osd(struct ceph_osd_client
*osdc
, int onum
)
930 struct ceph_osd
*osd
;
932 osd
= kzalloc(sizeof(*osd
), GFP_NOFS
);
936 atomic_set(&osd
->o_ref
, 1);
939 RB_CLEAR_NODE(&osd
->o_node
);
940 INIT_LIST_HEAD(&osd
->o_requests
);
941 INIT_LIST_HEAD(&osd
->o_linger_requests
);
942 INIT_LIST_HEAD(&osd
->o_osd_lru
);
943 osd
->o_incarnation
= 1;
945 ceph_con_init(&osd
->o_con
, osd
, &osd_con_ops
, &osdc
->client
->msgr
);
947 INIT_LIST_HEAD(&osd
->o_keepalive_item
);
951 static struct ceph_osd
*get_osd(struct ceph_osd
*osd
)
953 if (atomic_inc_not_zero(&osd
->o_ref
)) {
954 dout("get_osd %p %d -> %d\n", osd
, atomic_read(&osd
->o_ref
)-1,
955 atomic_read(&osd
->o_ref
));
958 dout("get_osd %p FAIL\n", osd
);
963 static void put_osd(struct ceph_osd
*osd
)
965 dout("put_osd %p %d -> %d\n", osd
, atomic_read(&osd
->o_ref
),
966 atomic_read(&osd
->o_ref
) - 1);
967 if (atomic_dec_and_test(&osd
->o_ref
) && osd
->o_auth
.authorizer
) {
968 struct ceph_auth_client
*ac
= osd
->o_osdc
->client
->monc
.auth
;
970 ceph_auth_destroy_authorizer(ac
, osd
->o_auth
.authorizer
);
976 * remove an osd from our map
978 static void __remove_osd(struct ceph_osd_client
*osdc
, struct ceph_osd
*osd
)
980 dout("__remove_osd %p\n", osd
);
981 BUG_ON(!list_empty(&osd
->o_requests
));
982 rb_erase(&osd
->o_node
, &osdc
->osds
);
983 list_del_init(&osd
->o_osd_lru
);
984 ceph_con_close(&osd
->o_con
);
988 static void remove_all_osds(struct ceph_osd_client
*osdc
)
990 dout("%s %p\n", __func__
, osdc
);
991 mutex_lock(&osdc
->request_mutex
);
992 while (!RB_EMPTY_ROOT(&osdc
->osds
)) {
993 struct ceph_osd
*osd
= rb_entry(rb_first(&osdc
->osds
),
994 struct ceph_osd
, o_node
);
995 __remove_osd(osdc
, osd
);
997 mutex_unlock(&osdc
->request_mutex
);
1000 static void __move_osd_to_lru(struct ceph_osd_client
*osdc
,
1001 struct ceph_osd
*osd
)
1003 dout("__move_osd_to_lru %p\n", osd
);
1004 BUG_ON(!list_empty(&osd
->o_osd_lru
));
1005 list_add_tail(&osd
->o_osd_lru
, &osdc
->osd_lru
);
1006 osd
->lru_ttl
= jiffies
+ osdc
->client
->options
->osd_idle_ttl
* HZ
;
1009 static void __remove_osd_from_lru(struct ceph_osd
*osd
)
1011 dout("__remove_osd_from_lru %p\n", osd
);
1012 if (!list_empty(&osd
->o_osd_lru
))
1013 list_del_init(&osd
->o_osd_lru
);
1016 static void remove_old_osds(struct ceph_osd_client
*osdc
)
1018 struct ceph_osd
*osd
, *nosd
;
1020 dout("__remove_old_osds %p\n", osdc
);
1021 mutex_lock(&osdc
->request_mutex
);
1022 list_for_each_entry_safe(osd
, nosd
, &osdc
->osd_lru
, o_osd_lru
) {
1023 if (time_before(jiffies
, osd
->lru_ttl
))
1025 __remove_osd(osdc
, osd
);
1027 mutex_unlock(&osdc
->request_mutex
);
1033 static int __reset_osd(struct ceph_osd_client
*osdc
, struct ceph_osd
*osd
)
1035 struct ceph_entity_addr
*peer_addr
;
1037 dout("__reset_osd %p osd%d\n", osd
, osd
->o_osd
);
1038 if (list_empty(&osd
->o_requests
) &&
1039 list_empty(&osd
->o_linger_requests
)) {
1040 __remove_osd(osdc
, osd
);
1045 peer_addr
= &osdc
->osdmap
->osd_addr
[osd
->o_osd
];
1046 if (!memcmp(peer_addr
, &osd
->o_con
.peer_addr
, sizeof (*peer_addr
)) &&
1047 !ceph_con_opened(&osd
->o_con
)) {
1048 struct ceph_osd_request
*req
;
1050 dout("osd addr hasn't changed and connection never opened, "
1051 "letting msgr retry\n");
1052 /* touch each r_stamp for handle_timeout()'s benfit */
1053 list_for_each_entry(req
, &osd
->o_requests
, r_osd_item
)
1054 req
->r_stamp
= jiffies
;
1059 ceph_con_close(&osd
->o_con
);
1060 ceph_con_open(&osd
->o_con
, CEPH_ENTITY_TYPE_OSD
, osd
->o_osd
, peer_addr
);
1061 osd
->o_incarnation
++;
1066 static void __insert_osd(struct ceph_osd_client
*osdc
, struct ceph_osd
*new)
1068 struct rb_node
**p
= &osdc
->osds
.rb_node
;
1069 struct rb_node
*parent
= NULL
;
1070 struct ceph_osd
*osd
= NULL
;
1072 dout("__insert_osd %p osd%d\n", new, new->o_osd
);
1075 osd
= rb_entry(parent
, struct ceph_osd
, o_node
);
1076 if (new->o_osd
< osd
->o_osd
)
1078 else if (new->o_osd
> osd
->o_osd
)
1079 p
= &(*p
)->rb_right
;
1084 rb_link_node(&new->o_node
, parent
, p
);
1085 rb_insert_color(&new->o_node
, &osdc
->osds
);
1088 static struct ceph_osd
*__lookup_osd(struct ceph_osd_client
*osdc
, int o
)
1090 struct ceph_osd
*osd
;
1091 struct rb_node
*n
= osdc
->osds
.rb_node
;
1094 osd
= rb_entry(n
, struct ceph_osd
, o_node
);
1097 else if (o
> osd
->o_osd
)
1105 static void __schedule_osd_timeout(struct ceph_osd_client
*osdc
)
1107 schedule_delayed_work(&osdc
->timeout_work
,
1108 osdc
->client
->options
->osd_keepalive_timeout
* HZ
);
1111 static void __cancel_osd_timeout(struct ceph_osd_client
*osdc
)
1113 cancel_delayed_work(&osdc
->timeout_work
);
1117 * Register request, assign tid. If this is the first request, set up
1118 * the timeout event.
1120 static void __register_request(struct ceph_osd_client
*osdc
,
1121 struct ceph_osd_request
*req
)
1123 req
->r_tid
= ++osdc
->last_tid
;
1124 req
->r_request
->hdr
.tid
= cpu_to_le64(req
->r_tid
);
1125 dout("__register_request %p tid %lld\n", req
, req
->r_tid
);
1126 __insert_request(osdc
, req
);
1127 ceph_osdc_get_request(req
);
1128 osdc
->num_requests
++;
1129 if (osdc
->num_requests
== 1) {
1130 dout(" first request, scheduling timeout\n");
1131 __schedule_osd_timeout(osdc
);
1136 * called under osdc->request_mutex
1138 static void __unregister_request(struct ceph_osd_client
*osdc
,
1139 struct ceph_osd_request
*req
)
1141 if (RB_EMPTY_NODE(&req
->r_node
)) {
1142 dout("__unregister_request %p tid %lld not registered\n",
1147 dout("__unregister_request %p tid %lld\n", req
, req
->r_tid
);
1148 rb_erase(&req
->r_node
, &osdc
->requests
);
1149 osdc
->num_requests
--;
1152 /* make sure the original request isn't in flight. */
1153 ceph_msg_revoke(req
->r_request
);
1155 list_del_init(&req
->r_osd_item
);
1156 if (list_empty(&req
->r_osd
->o_requests
) &&
1157 list_empty(&req
->r_osd
->o_linger_requests
)) {
1158 dout("moving osd to %p lru\n", req
->r_osd
);
1159 __move_osd_to_lru(osdc
, req
->r_osd
);
1161 if (list_empty(&req
->r_linger_item
))
1165 list_del_init(&req
->r_req_lru_item
);
1166 ceph_osdc_put_request(req
);
1168 if (osdc
->num_requests
== 0) {
1169 dout(" no requests, canceling timeout\n");
1170 __cancel_osd_timeout(osdc
);
1175 * Cancel a previously queued request message
1177 static void __cancel_request(struct ceph_osd_request
*req
)
1179 if (req
->r_sent
&& req
->r_osd
) {
1180 ceph_msg_revoke(req
->r_request
);
1185 static void __register_linger_request(struct ceph_osd_client
*osdc
,
1186 struct ceph_osd_request
*req
)
1188 dout("__register_linger_request %p\n", req
);
1189 ceph_osdc_get_request(req
);
1190 list_add_tail(&req
->r_linger_item
, &osdc
->req_linger
);
1192 list_add_tail(&req
->r_linger_osd
,
1193 &req
->r_osd
->o_linger_requests
);
1196 static void __unregister_linger_request(struct ceph_osd_client
*osdc
,
1197 struct ceph_osd_request
*req
)
1199 dout("__unregister_linger_request %p\n", req
);
1200 list_del_init(&req
->r_linger_item
);
1202 list_del_init(&req
->r_linger_osd
);
1204 if (list_empty(&req
->r_osd
->o_requests
) &&
1205 list_empty(&req
->r_osd
->o_linger_requests
)) {
1206 dout("moving osd to %p lru\n", req
->r_osd
);
1207 __move_osd_to_lru(osdc
, req
->r_osd
);
1209 if (list_empty(&req
->r_osd_item
))
1212 ceph_osdc_put_request(req
);
1215 void ceph_osdc_unregister_linger_request(struct ceph_osd_client
*osdc
,
1216 struct ceph_osd_request
*req
)
1218 mutex_lock(&osdc
->request_mutex
);
1219 if (req
->r_linger
) {
1221 __unregister_linger_request(osdc
, req
);
1223 mutex_unlock(&osdc
->request_mutex
);
1225 EXPORT_SYMBOL(ceph_osdc_unregister_linger_request
);
1227 void ceph_osdc_set_request_linger(struct ceph_osd_client
*osdc
,
1228 struct ceph_osd_request
*req
)
1230 if (!req
->r_linger
) {
1231 dout("set_request_linger %p\n", req
);
1235 EXPORT_SYMBOL(ceph_osdc_set_request_linger
);
1238 * Returns whether a request should be blocked from being sent
1239 * based on the current osdmap and osd_client settings.
1241 * Caller should hold map_sem for read.
1243 static bool __req_should_be_paused(struct ceph_osd_client
*osdc
,
1244 struct ceph_osd_request
*req
)
1246 bool pauserd
= ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_PAUSERD
);
1247 bool pausewr
= ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_PAUSEWR
) ||
1248 ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_FULL
);
1249 return (req
->r_flags
& CEPH_OSD_FLAG_READ
&& pauserd
) ||
1250 (req
->r_flags
& CEPH_OSD_FLAG_WRITE
&& pausewr
);
1254 * Calculate mapping of a request to a PG. Takes tiering into account.
1256 static int __calc_request_pg(struct ceph_osdmap
*osdmap
,
1257 struct ceph_osd_request
*req
,
1258 struct ceph_pg
*pg_out
)
1260 bool need_check_tiering
;
1262 need_check_tiering
= false;
1263 if (req
->r_target_oloc
.pool
== -1) {
1264 req
->r_target_oloc
= req
->r_base_oloc
; /* struct */
1265 need_check_tiering
= true;
1267 if (req
->r_target_oid
.name_len
== 0) {
1268 ceph_oid_copy(&req
->r_target_oid
, &req
->r_base_oid
);
1269 need_check_tiering
= true;
1272 if (need_check_tiering
&&
1273 (req
->r_flags
& CEPH_OSD_FLAG_IGNORE_OVERLAY
) == 0) {
1274 struct ceph_pg_pool_info
*pi
;
1276 pi
= ceph_pg_pool_by_id(osdmap
, req
->r_target_oloc
.pool
);
1278 if ((req
->r_flags
& CEPH_OSD_FLAG_READ
) &&
1280 req
->r_target_oloc
.pool
= pi
->read_tier
;
1281 if ((req
->r_flags
& CEPH_OSD_FLAG_WRITE
) &&
1282 pi
->write_tier
>= 0)
1283 req
->r_target_oloc
.pool
= pi
->write_tier
;
1285 /* !pi is caught in ceph_oloc_oid_to_pg() */
1288 return ceph_oloc_oid_to_pg(osdmap
, &req
->r_target_oloc
,
1289 &req
->r_target_oid
, pg_out
);
1293 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1294 * (as needed), and set the request r_osd appropriately. If there is
1295 * no up osd, set r_osd to NULL. Move the request to the appropriate list
1296 * (unsent, homeless) or leave on in-flight lru.
1298 * Return 0 if unchanged, 1 if changed, or negative on error.
1300 * Caller should hold map_sem for read and request_mutex.
1302 static int __map_request(struct ceph_osd_client
*osdc
,
1303 struct ceph_osd_request
*req
, int force_resend
)
1305 struct ceph_pg pgid
;
1306 int acting
[CEPH_PG_MAX_SIZE
];
1307 int o
= -1, num
= 0;
1311 dout("map_request %p tid %lld\n", req
, req
->r_tid
);
1313 err
= __calc_request_pg(osdc
->osdmap
, req
, &pgid
);
1315 list_move(&req
->r_req_lru_item
, &osdc
->req_notarget
);
1320 err
= ceph_calc_pg_acting(osdc
->osdmap
, pgid
, acting
);
1326 was_paused
= req
->r_paused
;
1327 req
->r_paused
= __req_should_be_paused(osdc
, req
);
1328 if (was_paused
&& !req
->r_paused
)
1331 if ((!force_resend
&&
1332 req
->r_osd
&& req
->r_osd
->o_osd
== o
&&
1333 req
->r_sent
>= req
->r_osd
->o_incarnation
&&
1334 req
->r_num_pg_osds
== num
&&
1335 memcmp(req
->r_pg_osds
, acting
, sizeof(acting
[0])*num
) == 0) ||
1336 (req
->r_osd
== NULL
&& o
== -1) ||
1338 return 0; /* no change */
1340 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1341 req
->r_tid
, pgid
.pool
, pgid
.seed
, o
,
1342 req
->r_osd
? req
->r_osd
->o_osd
: -1);
1344 /* record full pg acting set */
1345 memcpy(req
->r_pg_osds
, acting
, sizeof(acting
[0]) * num
);
1346 req
->r_num_pg_osds
= num
;
1349 __cancel_request(req
);
1350 list_del_init(&req
->r_osd_item
);
1354 req
->r_osd
= __lookup_osd(osdc
, o
);
1355 if (!req
->r_osd
&& o
>= 0) {
1357 req
->r_osd
= create_osd(osdc
, o
);
1359 list_move(&req
->r_req_lru_item
, &osdc
->req_notarget
);
1363 dout("map_request osd %p is osd%d\n", req
->r_osd
, o
);
1364 __insert_osd(osdc
, req
->r_osd
);
1366 ceph_con_open(&req
->r_osd
->o_con
,
1367 CEPH_ENTITY_TYPE_OSD
, o
,
1368 &osdc
->osdmap
->osd_addr
[o
]);
1372 __remove_osd_from_lru(req
->r_osd
);
1373 list_add_tail(&req
->r_osd_item
, &req
->r_osd
->o_requests
);
1374 list_move_tail(&req
->r_req_lru_item
, &osdc
->req_unsent
);
1376 list_move_tail(&req
->r_req_lru_item
, &osdc
->req_notarget
);
1378 err
= 1; /* osd or pg changed */
1385 * caller should hold map_sem (for read) and request_mutex
1387 static void __send_request(struct ceph_osd_client
*osdc
,
1388 struct ceph_osd_request
*req
)
1392 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1393 req
, req
->r_tid
, req
->r_osd
->o_osd
, req
->r_flags
,
1394 (unsigned long long)req
->r_pgid
.pool
, req
->r_pgid
.seed
);
1396 /* fill in message content that changes each time we send it */
1397 put_unaligned_le32(osdc
->osdmap
->epoch
, req
->r_request_osdmap_epoch
);
1398 put_unaligned_le32(req
->r_flags
, req
->r_request_flags
);
1399 put_unaligned_le64(req
->r_target_oloc
.pool
, req
->r_request_pool
);
1400 p
= req
->r_request_pgid
;
1401 ceph_encode_64(&p
, req
->r_pgid
.pool
);
1402 ceph_encode_32(&p
, req
->r_pgid
.seed
);
1403 put_unaligned_le64(1, req
->r_request_attempts
); /* FIXME */
1404 memcpy(req
->r_request_reassert_version
, &req
->r_reassert_version
,
1405 sizeof(req
->r_reassert_version
));
1407 req
->r_stamp
= jiffies
;
1408 list_move_tail(&req
->r_req_lru_item
, &osdc
->req_lru
);
1410 ceph_msg_get(req
->r_request
); /* send consumes a ref */
1412 req
->r_sent
= req
->r_osd
->o_incarnation
;
1414 ceph_con_send(&req
->r_osd
->o_con
, req
->r_request
);
1418 * Send any requests in the queue (req_unsent).
1420 static void __send_queued(struct ceph_osd_client
*osdc
)
1422 struct ceph_osd_request
*req
, *tmp
;
1424 dout("__send_queued\n");
1425 list_for_each_entry_safe(req
, tmp
, &osdc
->req_unsent
, r_req_lru_item
)
1426 __send_request(osdc
, req
);
1430 * Timeout callback, called every N seconds when 1 or more osd
1431 * requests has been active for more than N seconds. When this
1432 * happens, we ping all OSDs with requests who have timed out to
1433 * ensure any communications channel reset is detected. Reset the
1434 * request timeouts another N seconds in the future as we go.
1435 * Reschedule the timeout event another N seconds in future (unless
1436 * there are no open requests).
1438 static void handle_timeout(struct work_struct
*work
)
1440 struct ceph_osd_client
*osdc
=
1441 container_of(work
, struct ceph_osd_client
, timeout_work
.work
);
1442 struct ceph_osd_request
*req
;
1443 struct ceph_osd
*osd
;
1444 unsigned long keepalive
=
1445 osdc
->client
->options
->osd_keepalive_timeout
* HZ
;
1446 struct list_head slow_osds
;
1448 down_read(&osdc
->map_sem
);
1450 ceph_monc_request_next_osdmap(&osdc
->client
->monc
);
1452 mutex_lock(&osdc
->request_mutex
);
1455 * ping osds that are a bit slow. this ensures that if there
1456 * is a break in the TCP connection we will notice, and reopen
1457 * a connection with that osd (from the fault callback).
1459 INIT_LIST_HEAD(&slow_osds
);
1460 list_for_each_entry(req
, &osdc
->req_lru
, r_req_lru_item
) {
1461 if (time_before(jiffies
, req
->r_stamp
+ keepalive
))
1466 dout(" tid %llu is slow, will send keepalive on osd%d\n",
1467 req
->r_tid
, osd
->o_osd
);
1468 list_move_tail(&osd
->o_keepalive_item
, &slow_osds
);
1470 while (!list_empty(&slow_osds
)) {
1471 osd
= list_entry(slow_osds
.next
, struct ceph_osd
,
1473 list_del_init(&osd
->o_keepalive_item
);
1474 ceph_con_keepalive(&osd
->o_con
);
1477 __schedule_osd_timeout(osdc
);
1478 __send_queued(osdc
);
1479 mutex_unlock(&osdc
->request_mutex
);
1480 up_read(&osdc
->map_sem
);
1483 static void handle_osds_timeout(struct work_struct
*work
)
1485 struct ceph_osd_client
*osdc
=
1486 container_of(work
, struct ceph_osd_client
,
1487 osds_timeout_work
.work
);
1488 unsigned long delay
=
1489 osdc
->client
->options
->osd_idle_ttl
* HZ
>> 2;
1491 dout("osds timeout\n");
1492 down_read(&osdc
->map_sem
);
1493 remove_old_osds(osdc
);
1494 up_read(&osdc
->map_sem
);
1496 schedule_delayed_work(&osdc
->osds_timeout_work
,
1497 round_jiffies_relative(delay
));
1500 static int ceph_oloc_decode(void **p
, void *end
,
1501 struct ceph_object_locator
*oloc
)
1503 u8 struct_v
, struct_cv
;
1508 ceph_decode_need(p
, end
, 1 + 1 + 4, e_inval
);
1509 struct_v
= ceph_decode_8(p
);
1510 struct_cv
= ceph_decode_8(p
);
1512 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
1513 struct_v
, struct_cv
);
1516 if (struct_cv
> 6) {
1517 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
1518 struct_v
, struct_cv
);
1521 len
= ceph_decode_32(p
);
1522 ceph_decode_need(p
, end
, len
, e_inval
);
1523 struct_end
= *p
+ len
;
1525 oloc
->pool
= ceph_decode_64(p
);
1526 *p
+= 4; /* skip preferred */
1528 len
= ceph_decode_32(p
);
1530 pr_warn("ceph_object_locator::key is set\n");
1534 if (struct_v
>= 5) {
1535 len
= ceph_decode_32(p
);
1537 pr_warn("ceph_object_locator::nspace is set\n");
1542 if (struct_v
>= 6) {
1543 s64 hash
= ceph_decode_64(p
);
1545 pr_warn("ceph_object_locator::hash is set\n");
1560 static int ceph_redirect_decode(void **p
, void *end
,
1561 struct ceph_request_redirect
*redir
)
1563 u8 struct_v
, struct_cv
;
1568 ceph_decode_need(p
, end
, 1 + 1 + 4, e_inval
);
1569 struct_v
= ceph_decode_8(p
);
1570 struct_cv
= ceph_decode_8(p
);
1571 if (struct_cv
> 1) {
1572 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
1573 struct_v
, struct_cv
);
1576 len
= ceph_decode_32(p
);
1577 ceph_decode_need(p
, end
, len
, e_inval
);
1578 struct_end
= *p
+ len
;
1580 ret
= ceph_oloc_decode(p
, end
, &redir
->oloc
);
1584 len
= ceph_decode_32(p
);
1586 pr_warn("ceph_request_redirect::object_name is set\n");
1590 len
= ceph_decode_32(p
);
1591 *p
+= len
; /* skip osd_instructions */
1603 static void complete_request(struct ceph_osd_request
*req
)
1605 complete_all(&req
->r_safe_completion
); /* fsync waiter */
1609 * handle osd op reply. either call the callback if it is specified,
1610 * or do the completion to wake up the waiting thread.
1612 static void handle_reply(struct ceph_osd_client
*osdc
, struct ceph_msg
*msg
,
1613 struct ceph_connection
*con
)
1616 struct ceph_osd_request
*req
;
1617 struct ceph_request_redirect redir
;
1620 unsigned int numops
;
1621 int payload_len
, flags
;
1627 u64 reassert_version
;
1629 int already_completed
;
1633 tid
= le64_to_cpu(msg
->hdr
.tid
);
1634 dout("handle_reply %p tid %llu\n", msg
, tid
);
1636 p
= msg
->front
.iov_base
;
1637 end
= p
+ msg
->front
.iov_len
;
1639 ceph_decode_need(&p
, end
, 4, bad
);
1640 object_len
= ceph_decode_32(&p
);
1641 ceph_decode_need(&p
, end
, object_len
, bad
);
1644 err
= ceph_decode_pgid(&p
, end
, &pg
);
1648 ceph_decode_need(&p
, end
, 8 + 4 + 4 + 8 + 4, bad
);
1649 flags
= ceph_decode_64(&p
);
1650 result
= ceph_decode_32(&p
);
1651 reassert_epoch
= ceph_decode_32(&p
);
1652 reassert_version
= ceph_decode_64(&p
);
1653 osdmap_epoch
= ceph_decode_32(&p
);
1656 mutex_lock(&osdc
->request_mutex
);
1657 req
= __lookup_request(osdc
, tid
);
1659 dout("handle_reply tid %llu dne\n", tid
);
1662 ceph_osdc_get_request(req
);
1664 dout("handle_reply %p tid %llu req %p result %d\n", msg
, tid
,
1667 ceph_decode_need(&p
, end
, 4, bad_put
);
1668 numops
= ceph_decode_32(&p
);
1669 if (numops
> CEPH_OSD_MAX_OP
)
1671 if (numops
!= req
->r_num_ops
)
1674 ceph_decode_need(&p
, end
, numops
* sizeof(struct ceph_osd_op
), bad_put
);
1675 for (i
= 0; i
< numops
; i
++) {
1676 struct ceph_osd_op
*op
= p
;
1679 len
= le32_to_cpu(op
->payload_len
);
1680 req
->r_reply_op_len
[i
] = len
;
1681 dout(" op %d has %d bytes\n", i
, len
);
1685 bytes
= le32_to_cpu(msg
->hdr
.data_len
);
1686 if (payload_len
!= bytes
) {
1687 pr_warning("sum of op payload lens %d != data_len %d",
1688 payload_len
, bytes
);
1692 ceph_decode_need(&p
, end
, 4 + numops
* 4, bad_put
);
1693 retry_attempt
= ceph_decode_32(&p
);
1694 for (i
= 0; i
< numops
; i
++)
1695 req
->r_reply_op_result
[i
] = ceph_decode_32(&p
);
1697 if (le16_to_cpu(msg
->hdr
.version
) >= 6) {
1698 p
+= 8 + 4; /* skip replay_version */
1699 p
+= 8; /* skip user_version */
1701 err
= ceph_redirect_decode(&p
, end
, &redir
);
1705 redir
.oloc
.pool
= -1;
1708 if (redir
.oloc
.pool
!= -1) {
1709 dout("redirect pool %lld\n", redir
.oloc
.pool
);
1711 __unregister_request(osdc
, req
);
1712 mutex_unlock(&osdc
->request_mutex
);
1714 req
->r_target_oloc
= redir
.oloc
; /* struct */
1717 * Start redirect requests with nofail=true. If
1718 * mapping fails, request will end up on the notarget
1719 * list, waiting for the new osdmap (which can take
1720 * a while), even though the original request mapped
1721 * successfully. In the future we might want to follow
1722 * original request's nofail setting here.
1724 err
= ceph_osdc_start_request(osdc
, req
, true);
1730 already_completed
= req
->r_got_reply
;
1731 if (!req
->r_got_reply
) {
1732 req
->r_result
= result
;
1733 dout("handle_reply result %d bytes %d\n", req
->r_result
,
1735 if (req
->r_result
== 0)
1736 req
->r_result
= bytes
;
1738 /* in case this is a write and we need to replay, */
1739 req
->r_reassert_version
.epoch
= cpu_to_le32(reassert_epoch
);
1740 req
->r_reassert_version
.version
= cpu_to_le64(reassert_version
);
1742 req
->r_got_reply
= 1;
1743 } else if ((flags
& CEPH_OSD_FLAG_ONDISK
) == 0) {
1744 dout("handle_reply tid %llu dup ack\n", tid
);
1745 mutex_unlock(&osdc
->request_mutex
);
1749 dout("handle_reply tid %llu flags %d\n", tid
, flags
);
1751 if (req
->r_linger
&& (flags
& CEPH_OSD_FLAG_ONDISK
))
1752 __register_linger_request(osdc
, req
);
1754 /* either this is a read, or we got the safe response */
1756 (flags
& CEPH_OSD_FLAG_ONDISK
) ||
1757 ((flags
& CEPH_OSD_FLAG_WRITE
) == 0))
1758 __unregister_request(osdc
, req
);
1760 mutex_unlock(&osdc
->request_mutex
);
1762 if (!already_completed
) {
1763 if (req
->r_unsafe_callback
&&
1764 result
>= 0 && !(flags
& CEPH_OSD_FLAG_ONDISK
))
1765 req
->r_unsafe_callback(req
, true);
1766 if (req
->r_callback
)
1767 req
->r_callback(req
, msg
);
1769 complete_all(&req
->r_completion
);
1772 if (flags
& CEPH_OSD_FLAG_ONDISK
) {
1773 if (req
->r_unsafe_callback
&& already_completed
)
1774 req
->r_unsafe_callback(req
, false);
1775 complete_request(req
);
1779 dout("req=%p req->r_linger=%d\n", req
, req
->r_linger
);
1780 ceph_osdc_put_request(req
);
1784 req
->r_result
= -EIO
;
1785 __unregister_request(osdc
, req
);
1786 if (req
->r_callback
)
1787 req
->r_callback(req
, msg
);
1789 complete_all(&req
->r_completion
);
1790 complete_request(req
);
1791 ceph_osdc_put_request(req
);
1793 mutex_unlock(&osdc
->request_mutex
);
1795 pr_err("corrupt osd_op_reply got %d %d\n",
1796 (int)msg
->front
.iov_len
, le32_to_cpu(msg
->hdr
.front_len
));
1800 static void reset_changed_osds(struct ceph_osd_client
*osdc
)
1802 struct rb_node
*p
, *n
;
1804 for (p
= rb_first(&osdc
->osds
); p
; p
= n
) {
1805 struct ceph_osd
*osd
= rb_entry(p
, struct ceph_osd
, o_node
);
1808 if (!ceph_osd_is_up(osdc
->osdmap
, osd
->o_osd
) ||
1809 memcmp(&osd
->o_con
.peer_addr
,
1810 ceph_osd_addr(osdc
->osdmap
,
1812 sizeof(struct ceph_entity_addr
)) != 0)
1813 __reset_osd(osdc
, osd
);
1818 * Requeue requests whose mapping to an OSD has changed. If requests map to
1819 * no osd, request a new map.
1821 * Caller should hold map_sem for read.
1823 static void kick_requests(struct ceph_osd_client
*osdc
, bool force_resend
,
1824 bool force_resend_writes
)
1826 struct ceph_osd_request
*req
, *nreq
;
1830 bool force_resend_req
;
1832 dout("kick_requests %s %s\n", force_resend
? " (force resend)" : "",
1833 force_resend_writes
? " (force resend writes)" : "");
1834 mutex_lock(&osdc
->request_mutex
);
1835 for (p
= rb_first(&osdc
->requests
); p
; ) {
1836 req
= rb_entry(p
, struct ceph_osd_request
, r_node
);
1840 * For linger requests that have not yet been
1841 * registered, move them to the linger list; they'll
1842 * be sent to the osd in the loop below. Unregister
1843 * the request before re-registering it as a linger
1844 * request to ensure the __map_request() below
1845 * will decide it needs to be sent.
1847 if (req
->r_linger
&& list_empty(&req
->r_linger_item
)) {
1848 dout("%p tid %llu restart on osd%d\n",
1850 req
->r_osd
? req
->r_osd
->o_osd
: -1);
1851 ceph_osdc_get_request(req
);
1852 __unregister_request(osdc
, req
);
1853 __register_linger_request(osdc
, req
);
1854 ceph_osdc_put_request(req
);
1858 force_resend_req
= force_resend
||
1859 (force_resend_writes
&&
1860 req
->r_flags
& CEPH_OSD_FLAG_WRITE
);
1861 err
= __map_request(osdc
, req
, force_resend_req
);
1863 continue; /* error */
1864 if (req
->r_osd
== NULL
) {
1865 dout("%p tid %llu maps to no osd\n", req
, req
->r_tid
);
1866 needmap
++; /* request a newer map */
1867 } else if (err
> 0) {
1868 if (!req
->r_linger
) {
1869 dout("%p tid %llu requeued on osd%d\n", req
,
1871 req
->r_osd
? req
->r_osd
->o_osd
: -1);
1872 req
->r_flags
|= CEPH_OSD_FLAG_RETRY
;
1877 list_for_each_entry_safe(req
, nreq
, &osdc
->req_linger
,
1879 dout("linger req=%p req->r_osd=%p\n", req
, req
->r_osd
);
1881 err
= __map_request(osdc
, req
,
1882 force_resend
|| force_resend_writes
);
1883 dout("__map_request returned %d\n", err
);
1885 continue; /* no change and no osd was specified */
1887 continue; /* hrm! */
1888 if (req
->r_osd
== NULL
) {
1889 dout("tid %llu maps to no valid osd\n", req
->r_tid
);
1890 needmap
++; /* request a newer map */
1894 dout("kicking lingering %p tid %llu osd%d\n", req
, req
->r_tid
,
1895 req
->r_osd
? req
->r_osd
->o_osd
: -1);
1896 __register_request(osdc
, req
);
1897 __unregister_linger_request(osdc
, req
);
1899 reset_changed_osds(osdc
);
1900 mutex_unlock(&osdc
->request_mutex
);
1903 dout("%d requests for down osds, need new map\n", needmap
);
1904 ceph_monc_request_next_osdmap(&osdc
->client
->monc
);
1910 * Process updated osd map.
1912 * The message contains any number of incremental and full maps, normally
1913 * indicating some sort of topology change in the cluster. Kick requests
1914 * off to different OSDs as needed.
1916 void ceph_osdc_handle_map(struct ceph_osd_client
*osdc
, struct ceph_msg
*msg
)
1918 void *p
, *end
, *next
;
1919 u32 nr_maps
, maplen
;
1921 struct ceph_osdmap
*newmap
= NULL
, *oldmap
;
1923 struct ceph_fsid fsid
;
1926 dout("handle_map have %u\n", osdc
->osdmap
? osdc
->osdmap
->epoch
: 0);
1927 p
= msg
->front
.iov_base
;
1928 end
= p
+ msg
->front
.iov_len
;
1931 ceph_decode_need(&p
, end
, sizeof(fsid
), bad
);
1932 ceph_decode_copy(&p
, &fsid
, sizeof(fsid
));
1933 if (ceph_check_fsid(osdc
->client
, &fsid
) < 0)
1936 down_write(&osdc
->map_sem
);
1938 was_full
= ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_FULL
);
1940 /* incremental maps */
1941 ceph_decode_32_safe(&p
, end
, nr_maps
, bad
);
1942 dout(" %d inc maps\n", nr_maps
);
1943 while (nr_maps
> 0) {
1944 ceph_decode_need(&p
, end
, 2*sizeof(u32
), bad
);
1945 epoch
= ceph_decode_32(&p
);
1946 maplen
= ceph_decode_32(&p
);
1947 ceph_decode_need(&p
, end
, maplen
, bad
);
1949 if (osdc
->osdmap
&& osdc
->osdmap
->epoch
+1 == epoch
) {
1950 dout("applying incremental map %u len %d\n",
1952 newmap
= osdmap_apply_incremental(&p
, next
,
1954 &osdc
->client
->msgr
);
1955 if (IS_ERR(newmap
)) {
1956 err
= PTR_ERR(newmap
);
1960 if (newmap
!= osdc
->osdmap
) {
1961 ceph_osdmap_destroy(osdc
->osdmap
);
1962 osdc
->osdmap
= newmap
;
1964 was_full
= was_full
||
1965 ceph_osdmap_flag(osdc
->osdmap
,
1967 kick_requests(osdc
, 0, was_full
);
1969 dout("ignoring incremental map %u len %d\n",
1979 ceph_decode_32_safe(&p
, end
, nr_maps
, bad
);
1980 dout(" %d full maps\n", nr_maps
);
1982 ceph_decode_need(&p
, end
, 2*sizeof(u32
), bad
);
1983 epoch
= ceph_decode_32(&p
);
1984 maplen
= ceph_decode_32(&p
);
1985 ceph_decode_need(&p
, end
, maplen
, bad
);
1987 dout("skipping non-latest full map %u len %d\n",
1989 } else if (osdc
->osdmap
&& osdc
->osdmap
->epoch
>= epoch
) {
1990 dout("skipping full map %u len %d, "
1991 "older than our %u\n", epoch
, maplen
,
1992 osdc
->osdmap
->epoch
);
1994 int skipped_map
= 0;
1996 dout("taking full map %u len %d\n", epoch
, maplen
);
1997 newmap
= osdmap_decode(&p
, p
+maplen
);
1998 if (IS_ERR(newmap
)) {
1999 err
= PTR_ERR(newmap
);
2003 oldmap
= osdc
->osdmap
;
2004 osdc
->osdmap
= newmap
;
2006 if (oldmap
->epoch
+ 1 < newmap
->epoch
)
2008 ceph_osdmap_destroy(oldmap
);
2010 was_full
= was_full
||
2011 ceph_osdmap_flag(osdc
->osdmap
,
2013 kick_requests(osdc
, skipped_map
, was_full
);
2022 downgrade_write(&osdc
->map_sem
);
2023 ceph_monc_got_osdmap(&osdc
->client
->monc
, osdc
->osdmap
->epoch
);
2026 * subscribe to subsequent osdmap updates if full to ensure
2027 * we find out when we are no longer full and stop returning
2030 if (ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_FULL
) ||
2031 ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_PAUSERD
) ||
2032 ceph_osdmap_flag(osdc
->osdmap
, CEPH_OSDMAP_PAUSEWR
))
2033 ceph_monc_request_next_osdmap(&osdc
->client
->monc
);
2035 mutex_lock(&osdc
->request_mutex
);
2036 __send_queued(osdc
);
2037 mutex_unlock(&osdc
->request_mutex
);
2038 up_read(&osdc
->map_sem
);
2039 wake_up_all(&osdc
->client
->auth_wq
);
2043 pr_err("osdc handle_map corrupt msg\n");
2045 up_write(&osdc
->map_sem
);
2050 * watch/notify callback event infrastructure
2052 * These callbacks are used both for watch and notify operations.
2054 static void __release_event(struct kref
*kref
)
2056 struct ceph_osd_event
*event
=
2057 container_of(kref
, struct ceph_osd_event
, kref
);
2059 dout("__release_event %p\n", event
);
2063 static void get_event(struct ceph_osd_event
*event
)
2065 kref_get(&event
->kref
);
2068 void ceph_osdc_put_event(struct ceph_osd_event
*event
)
2070 kref_put(&event
->kref
, __release_event
);
2072 EXPORT_SYMBOL(ceph_osdc_put_event
);
2074 static void __insert_event(struct ceph_osd_client
*osdc
,
2075 struct ceph_osd_event
*new)
2077 struct rb_node
**p
= &osdc
->event_tree
.rb_node
;
2078 struct rb_node
*parent
= NULL
;
2079 struct ceph_osd_event
*event
= NULL
;
2083 event
= rb_entry(parent
, struct ceph_osd_event
, node
);
2084 if (new->cookie
< event
->cookie
)
2086 else if (new->cookie
> event
->cookie
)
2087 p
= &(*p
)->rb_right
;
2092 rb_link_node(&new->node
, parent
, p
);
2093 rb_insert_color(&new->node
, &osdc
->event_tree
);
2096 static struct ceph_osd_event
*__find_event(struct ceph_osd_client
*osdc
,
2099 struct rb_node
**p
= &osdc
->event_tree
.rb_node
;
2100 struct rb_node
*parent
= NULL
;
2101 struct ceph_osd_event
*event
= NULL
;
2105 event
= rb_entry(parent
, struct ceph_osd_event
, node
);
2106 if (cookie
< event
->cookie
)
2108 else if (cookie
> event
->cookie
)
2109 p
= &(*p
)->rb_right
;
2116 static void __remove_event(struct ceph_osd_event
*event
)
2118 struct ceph_osd_client
*osdc
= event
->osdc
;
2120 if (!RB_EMPTY_NODE(&event
->node
)) {
2121 dout("__remove_event removed %p\n", event
);
2122 rb_erase(&event
->node
, &osdc
->event_tree
);
2123 ceph_osdc_put_event(event
);
2125 dout("__remove_event didn't remove %p\n", event
);
2129 int ceph_osdc_create_event(struct ceph_osd_client
*osdc
,
2130 void (*event_cb
)(u64
, u64
, u8
, void *),
2131 void *data
, struct ceph_osd_event
**pevent
)
2133 struct ceph_osd_event
*event
;
2135 event
= kmalloc(sizeof(*event
), GFP_NOIO
);
2139 dout("create_event %p\n", event
);
2140 event
->cb
= event_cb
;
2141 event
->one_shot
= 0;
2144 INIT_LIST_HEAD(&event
->osd_node
);
2145 RB_CLEAR_NODE(&event
->node
);
2146 kref_init(&event
->kref
); /* one ref for us */
2147 kref_get(&event
->kref
); /* one ref for the caller */
2149 spin_lock(&osdc
->event_lock
);
2150 event
->cookie
= ++osdc
->event_count
;
2151 __insert_event(osdc
, event
);
2152 spin_unlock(&osdc
->event_lock
);
2157 EXPORT_SYMBOL(ceph_osdc_create_event
);
2159 void ceph_osdc_cancel_event(struct ceph_osd_event
*event
)
2161 struct ceph_osd_client
*osdc
= event
->osdc
;
2163 dout("cancel_event %p\n", event
);
2164 spin_lock(&osdc
->event_lock
);
2165 __remove_event(event
);
2166 spin_unlock(&osdc
->event_lock
);
2167 ceph_osdc_put_event(event
); /* caller's */
2169 EXPORT_SYMBOL(ceph_osdc_cancel_event
);
2172 static void do_event_work(struct work_struct
*work
)
2174 struct ceph_osd_event_work
*event_work
=
2175 container_of(work
, struct ceph_osd_event_work
, work
);
2176 struct ceph_osd_event
*event
= event_work
->event
;
2177 u64 ver
= event_work
->ver
;
2178 u64 notify_id
= event_work
->notify_id
;
2179 u8 opcode
= event_work
->opcode
;
2181 dout("do_event_work completing %p\n", event
);
2182 event
->cb(ver
, notify_id
, opcode
, event
->data
);
2183 dout("do_event_work completed %p\n", event
);
2184 ceph_osdc_put_event(event
);
2190 * Process osd watch notifications
2192 static void handle_watch_notify(struct ceph_osd_client
*osdc
,
2193 struct ceph_msg
*msg
)
2197 u64 cookie
, ver
, notify_id
;
2199 struct ceph_osd_event
*event
;
2200 struct ceph_osd_event_work
*event_work
;
2202 p
= msg
->front
.iov_base
;
2203 end
= p
+ msg
->front
.iov_len
;
2205 ceph_decode_8_safe(&p
, end
, proto_ver
, bad
);
2206 ceph_decode_8_safe(&p
, end
, opcode
, bad
);
2207 ceph_decode_64_safe(&p
, end
, cookie
, bad
);
2208 ceph_decode_64_safe(&p
, end
, ver
, bad
);
2209 ceph_decode_64_safe(&p
, end
, notify_id
, bad
);
2211 spin_lock(&osdc
->event_lock
);
2212 event
= __find_event(osdc
, cookie
);
2214 BUG_ON(event
->one_shot
);
2217 spin_unlock(&osdc
->event_lock
);
2218 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
2219 cookie
, ver
, event
);
2221 event_work
= kmalloc(sizeof(*event_work
), GFP_NOIO
);
2223 dout("ERROR: could not allocate event_work\n");
2226 INIT_WORK(&event_work
->work
, do_event_work
);
2227 event_work
->event
= event
;
2228 event_work
->ver
= ver
;
2229 event_work
->notify_id
= notify_id
;
2230 event_work
->opcode
= opcode
;
2231 if (!queue_work(osdc
->notify_wq
, &event_work
->work
)) {
2232 dout("WARNING: failed to queue notify event work\n");
2240 ceph_osdc_put_event(event
);
2244 pr_err("osdc handle_watch_notify corrupt msg\n");
2249 * build new request AND message
2252 void ceph_osdc_build_request(struct ceph_osd_request
*req
, u64 off
,
2253 struct ceph_snap_context
*snapc
, u64 snap_id
,
2254 struct timespec
*mtime
)
2256 struct ceph_msg
*msg
= req
->r_request
;
2259 int flags
= req
->r_flags
;
2263 req
->r_snapid
= snap_id
;
2264 req
->r_snapc
= ceph_get_snap_context(snapc
);
2266 /* encode request */
2267 msg
->hdr
.version
= cpu_to_le16(4);
2269 p
= msg
->front
.iov_base
;
2270 ceph_encode_32(&p
, 1); /* client_inc is always 1 */
2271 req
->r_request_osdmap_epoch
= p
;
2273 req
->r_request_flags
= p
;
2275 if (req
->r_flags
& CEPH_OSD_FLAG_WRITE
)
2276 ceph_encode_timespec(p
, mtime
);
2277 p
+= sizeof(struct ceph_timespec
);
2278 req
->r_request_reassert_version
= p
;
2279 p
+= sizeof(struct ceph_eversion
); /* will get filled in */
2282 ceph_encode_8(&p
, 4);
2283 ceph_encode_8(&p
, 4);
2284 ceph_encode_32(&p
, 8 + 4 + 4);
2285 req
->r_request_pool
= p
;
2287 ceph_encode_32(&p
, -1); /* preferred */
2288 ceph_encode_32(&p
, 0); /* key len */
2290 ceph_encode_8(&p
, 1);
2291 req
->r_request_pgid
= p
;
2293 ceph_encode_32(&p
, -1); /* preferred */
2296 ceph_encode_32(&p
, req
->r_base_oid
.name_len
);
2297 memcpy(p
, req
->r_base_oid
.name
, req
->r_base_oid
.name_len
);
2298 dout("oid '%.*s' len %d\n", req
->r_base_oid
.name_len
,
2299 req
->r_base_oid
.name
, req
->r_base_oid
.name_len
);
2300 p
+= req
->r_base_oid
.name_len
;
2302 /* ops--can imply data */
2303 ceph_encode_16(&p
, (u16
)req
->r_num_ops
);
2305 for (i
= 0; i
< req
->r_num_ops
; i
++) {
2306 data_len
+= osd_req_encode_op(req
, p
, i
);
2307 p
+= sizeof(struct ceph_osd_op
);
2311 ceph_encode_64(&p
, req
->r_snapid
);
2312 ceph_encode_64(&p
, req
->r_snapc
? req
->r_snapc
->seq
: 0);
2313 ceph_encode_32(&p
, req
->r_snapc
? req
->r_snapc
->num_snaps
: 0);
2315 for (i
= 0; i
< snapc
->num_snaps
; i
++) {
2316 ceph_encode_64(&p
, req
->r_snapc
->snaps
[i
]);
2320 req
->r_request_attempts
= p
;
2324 if (flags
& CEPH_OSD_FLAG_WRITE
) {
2328 * The header "data_off" is a hint to the receiver
2329 * allowing it to align received data into its
2330 * buffers such that there's no need to re-copy
2331 * it before writing it to disk (direct I/O).
2333 data_off
= (u16
) (off
& 0xffff);
2334 req
->r_request
->hdr
.data_off
= cpu_to_le16(data_off
);
2336 req
->r_request
->hdr
.data_len
= cpu_to_le32(data_len
);
2338 BUG_ON(p
> msg
->front
.iov_base
+ msg
->front
.iov_len
);
2339 msg_size
= p
- msg
->front
.iov_base
;
2340 msg
->front
.iov_len
= msg_size
;
2341 msg
->hdr
.front_len
= cpu_to_le32(msg_size
);
2343 dout("build_request msg_size was %d\n", (int)msg_size
);
2345 EXPORT_SYMBOL(ceph_osdc_build_request
);
2348 * Register request, send initial attempt.
2350 int ceph_osdc_start_request(struct ceph_osd_client
*osdc
,
2351 struct ceph_osd_request
*req
,
2356 down_read(&osdc
->map_sem
);
2357 mutex_lock(&osdc
->request_mutex
);
2358 __register_request(osdc
, req
);
2360 req
->r_got_reply
= 0;
2361 rc
= __map_request(osdc
, req
, 0);
2364 dout("osdc_start_request failed map, "
2365 " will retry %lld\n", req
->r_tid
);
2368 __unregister_request(osdc
, req
);
2372 if (req
->r_osd
== NULL
) {
2373 dout("send_request %p no up osds in pg\n", req
);
2374 ceph_monc_request_next_osdmap(&osdc
->client
->monc
);
2376 __send_queued(osdc
);
2380 mutex_unlock(&osdc
->request_mutex
);
2381 up_read(&osdc
->map_sem
);
2384 EXPORT_SYMBOL(ceph_osdc_start_request
);
2387 * wait for a request to complete
2389 int ceph_osdc_wait_request(struct ceph_osd_client
*osdc
,
2390 struct ceph_osd_request
*req
)
2394 rc
= wait_for_completion_interruptible(&req
->r_completion
);
2396 mutex_lock(&osdc
->request_mutex
);
2397 __cancel_request(req
);
2398 __unregister_request(osdc
, req
);
2399 mutex_unlock(&osdc
->request_mutex
);
2400 complete_request(req
);
2401 dout("wait_request tid %llu canceled/timed out\n", req
->r_tid
);
2405 dout("wait_request tid %llu result %d\n", req
->r_tid
, req
->r_result
);
2406 return req
->r_result
;
2408 EXPORT_SYMBOL(ceph_osdc_wait_request
);
2411 * sync - wait for all in-flight requests to flush. avoid starvation.
2413 void ceph_osdc_sync(struct ceph_osd_client
*osdc
)
2415 struct ceph_osd_request
*req
;
2416 u64 last_tid
, next_tid
= 0;
2418 mutex_lock(&osdc
->request_mutex
);
2419 last_tid
= osdc
->last_tid
;
2421 req
= __lookup_request_ge(osdc
, next_tid
);
2424 if (req
->r_tid
> last_tid
)
2427 next_tid
= req
->r_tid
+ 1;
2428 if ((req
->r_flags
& CEPH_OSD_FLAG_WRITE
) == 0)
2431 ceph_osdc_get_request(req
);
2432 mutex_unlock(&osdc
->request_mutex
);
2433 dout("sync waiting on tid %llu (last is %llu)\n",
2434 req
->r_tid
, last_tid
);
2435 wait_for_completion(&req
->r_safe_completion
);
2436 mutex_lock(&osdc
->request_mutex
);
2437 ceph_osdc_put_request(req
);
2439 mutex_unlock(&osdc
->request_mutex
);
2440 dout("sync done (thru tid %llu)\n", last_tid
);
2442 EXPORT_SYMBOL(ceph_osdc_sync
);
2445 * Call all pending notify callbacks - for use after a watch is
2446 * unregistered, to make sure no more callbacks for it will be invoked
2448 extern void ceph_osdc_flush_notifies(struct ceph_osd_client
*osdc
)
2450 flush_workqueue(osdc
->notify_wq
);
2452 EXPORT_SYMBOL(ceph_osdc_flush_notifies
);
2458 int ceph_osdc_init(struct ceph_osd_client
*osdc
, struct ceph_client
*client
)
2463 osdc
->client
= client
;
2464 osdc
->osdmap
= NULL
;
2465 init_rwsem(&osdc
->map_sem
);
2466 init_completion(&osdc
->map_waiters
);
2467 osdc
->last_requested_map
= 0;
2468 mutex_init(&osdc
->request_mutex
);
2470 osdc
->osds
= RB_ROOT
;
2471 INIT_LIST_HEAD(&osdc
->osd_lru
);
2472 osdc
->requests
= RB_ROOT
;
2473 INIT_LIST_HEAD(&osdc
->req_lru
);
2474 INIT_LIST_HEAD(&osdc
->req_unsent
);
2475 INIT_LIST_HEAD(&osdc
->req_notarget
);
2476 INIT_LIST_HEAD(&osdc
->req_linger
);
2477 osdc
->num_requests
= 0;
2478 INIT_DELAYED_WORK(&osdc
->timeout_work
, handle_timeout
);
2479 INIT_DELAYED_WORK(&osdc
->osds_timeout_work
, handle_osds_timeout
);
2480 spin_lock_init(&osdc
->event_lock
);
2481 osdc
->event_tree
= RB_ROOT
;
2482 osdc
->event_count
= 0;
2484 schedule_delayed_work(&osdc
->osds_timeout_work
,
2485 round_jiffies_relative(osdc
->client
->options
->osd_idle_ttl
* HZ
));
2488 osdc
->req_mempool
= mempool_create_kmalloc_pool(10,
2489 sizeof(struct ceph_osd_request
));
2490 if (!osdc
->req_mempool
)
2493 err
= ceph_msgpool_init(&osdc
->msgpool_op
, CEPH_MSG_OSD_OP
,
2494 OSD_OP_FRONT_LEN
, 10, true,
2498 err
= ceph_msgpool_init(&osdc
->msgpool_op_reply
, CEPH_MSG_OSD_OPREPLY
,
2499 OSD_OPREPLY_FRONT_LEN
, 10, true,
2505 osdc
->notify_wq
= create_singlethread_workqueue("ceph-watch-notify");
2506 if (!osdc
->notify_wq
)
2511 ceph_msgpool_destroy(&osdc
->msgpool_op
);
2513 mempool_destroy(osdc
->req_mempool
);
2518 void ceph_osdc_stop(struct ceph_osd_client
*osdc
)
2520 flush_workqueue(osdc
->notify_wq
);
2521 destroy_workqueue(osdc
->notify_wq
);
2522 cancel_delayed_work_sync(&osdc
->timeout_work
);
2523 cancel_delayed_work_sync(&osdc
->osds_timeout_work
);
2525 ceph_osdmap_destroy(osdc
->osdmap
);
2526 osdc
->osdmap
= NULL
;
2528 remove_all_osds(osdc
);
2529 mempool_destroy(osdc
->req_mempool
);
2530 ceph_msgpool_destroy(&osdc
->msgpool_op
);
2531 ceph_msgpool_destroy(&osdc
->msgpool_op_reply
);
2535 * Read some contiguous pages. If we cross a stripe boundary, shorten
2536 * *plen. Return number of bytes read, or error.
2538 int ceph_osdc_readpages(struct ceph_osd_client
*osdc
,
2539 struct ceph_vino vino
, struct ceph_file_layout
*layout
,
2541 u32 truncate_seq
, u64 truncate_size
,
2542 struct page
**pages
, int num_pages
, int page_align
)
2544 struct ceph_osd_request
*req
;
2547 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino
.ino
,
2548 vino
.snap
, off
, *plen
);
2549 req
= ceph_osdc_new_request(osdc
, layout
, vino
, off
, plen
, 1,
2550 CEPH_OSD_OP_READ
, CEPH_OSD_FLAG_READ
,
2551 NULL
, truncate_seq
, truncate_size
,
2554 return PTR_ERR(req
);
2556 /* it may be a short read due to an object boundary */
2558 osd_req_op_extent_osd_data_pages(req
, 0,
2559 pages
, *plen
, page_align
, false, false);
2561 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
2562 off
, *plen
, *plen
, page_align
);
2564 ceph_osdc_build_request(req
, off
, NULL
, vino
.snap
, NULL
);
2566 rc
= ceph_osdc_start_request(osdc
, req
, false);
2568 rc
= ceph_osdc_wait_request(osdc
, req
);
2570 ceph_osdc_put_request(req
);
2571 dout("readpages result %d\n", rc
);
2574 EXPORT_SYMBOL(ceph_osdc_readpages
);
2577 * do a synchronous write on N pages
2579 int ceph_osdc_writepages(struct ceph_osd_client
*osdc
, struct ceph_vino vino
,
2580 struct ceph_file_layout
*layout
,
2581 struct ceph_snap_context
*snapc
,
2583 u32 truncate_seq
, u64 truncate_size
,
2584 struct timespec
*mtime
,
2585 struct page
**pages
, int num_pages
)
2587 struct ceph_osd_request
*req
;
2589 int page_align
= off
& ~PAGE_MASK
;
2591 BUG_ON(vino
.snap
!= CEPH_NOSNAP
); /* snapshots aren't writeable */
2592 req
= ceph_osdc_new_request(osdc
, layout
, vino
, off
, &len
, 1,
2594 CEPH_OSD_FLAG_ONDISK
| CEPH_OSD_FLAG_WRITE
,
2595 snapc
, truncate_seq
, truncate_size
,
2598 return PTR_ERR(req
);
2600 /* it may be a short write due to an object boundary */
2601 osd_req_op_extent_osd_data_pages(req
, 0, pages
, len
, page_align
,
2603 dout("writepages %llu~%llu (%llu bytes)\n", off
, len
, len
);
2605 ceph_osdc_build_request(req
, off
, snapc
, CEPH_NOSNAP
, mtime
);
2607 rc
= ceph_osdc_start_request(osdc
, req
, true);
2609 rc
= ceph_osdc_wait_request(osdc
, req
);
2611 ceph_osdc_put_request(req
);
2614 dout("writepages result %d\n", rc
);
2617 EXPORT_SYMBOL(ceph_osdc_writepages
);
2619 int ceph_osdc_setup(void)
2621 BUG_ON(ceph_osd_request_cache
);
2622 ceph_osd_request_cache
= kmem_cache_create("ceph_osd_request",
2623 sizeof (struct ceph_osd_request
),
2624 __alignof__(struct ceph_osd_request
),
2627 return ceph_osd_request_cache
? 0 : -ENOMEM
;
2629 EXPORT_SYMBOL(ceph_osdc_setup
);
2631 void ceph_osdc_cleanup(void)
2633 BUG_ON(!ceph_osd_request_cache
);
2634 kmem_cache_destroy(ceph_osd_request_cache
);
2635 ceph_osd_request_cache
= NULL
;
2637 EXPORT_SYMBOL(ceph_osdc_cleanup
);
2640 * handle incoming message
2642 static void dispatch(struct ceph_connection
*con
, struct ceph_msg
*msg
)
2644 struct ceph_osd
*osd
= con
->private;
2645 struct ceph_osd_client
*osdc
;
2646 int type
= le16_to_cpu(msg
->hdr
.type
);
2653 case CEPH_MSG_OSD_MAP
:
2654 ceph_osdc_handle_map(osdc
, msg
);
2656 case CEPH_MSG_OSD_OPREPLY
:
2657 handle_reply(osdc
, msg
, con
);
2659 case CEPH_MSG_WATCH_NOTIFY
:
2660 handle_watch_notify(osdc
, msg
);
2664 pr_err("received unknown message type %d %s\n", type
,
2665 ceph_msg_type_name(type
));
2672 * lookup and return message for incoming reply. set up reply message
2675 static struct ceph_msg
*get_reply(struct ceph_connection
*con
,
2676 struct ceph_msg_header
*hdr
,
2679 struct ceph_osd
*osd
= con
->private;
2680 struct ceph_osd_client
*osdc
= osd
->o_osdc
;
2682 struct ceph_osd_request
*req
;
2683 int front_len
= le32_to_cpu(hdr
->front_len
);
2684 int data_len
= le32_to_cpu(hdr
->data_len
);
2687 tid
= le64_to_cpu(hdr
->tid
);
2688 mutex_lock(&osdc
->request_mutex
);
2689 req
= __lookup_request(osdc
, tid
);
2693 dout("get_reply unknown tid %llu from osd%d\n", tid
,
2698 if (req
->r_reply
->con
)
2699 dout("%s revoking msg %p from old con %p\n", __func__
,
2700 req
->r_reply
, req
->r_reply
->con
);
2701 ceph_msg_revoke_incoming(req
->r_reply
);
2703 if (front_len
> req
->r_reply
->front_alloc_len
) {
2704 pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
2705 front_len
, req
->r_reply
->front_alloc_len
,
2706 (unsigned int)con
->peer_name
.type
,
2707 le64_to_cpu(con
->peer_name
.num
));
2708 m
= ceph_msg_new(CEPH_MSG_OSD_OPREPLY
, front_len
, GFP_NOFS
,
2712 ceph_msg_put(req
->r_reply
);
2715 m
= ceph_msg_get(req
->r_reply
);
2718 struct ceph_osd_data
*osd_data
;
2721 * XXX This is assuming there is only one op containing
2722 * XXX page data. Probably OK for reads, but this
2723 * XXX ought to be done more generally.
2725 osd_data
= osd_req_op_extent_osd_data(req
, 0);
2726 if (osd_data
->type
== CEPH_OSD_DATA_TYPE_PAGES
) {
2727 if (osd_data
->pages
&&
2728 unlikely(osd_data
->length
< data_len
)) {
2730 pr_warning("tid %lld reply has %d bytes "
2731 "we had only %llu bytes ready\n",
2732 tid
, data_len
, osd_data
->length
);
2741 dout("get_reply tid %lld %p\n", tid
, m
);
2744 mutex_unlock(&osdc
->request_mutex
);
2749 static struct ceph_msg
*alloc_msg(struct ceph_connection
*con
,
2750 struct ceph_msg_header
*hdr
,
2753 struct ceph_osd
*osd
= con
->private;
2754 int type
= le16_to_cpu(hdr
->type
);
2755 int front
= le32_to_cpu(hdr
->front_len
);
2759 case CEPH_MSG_OSD_MAP
:
2760 case CEPH_MSG_WATCH_NOTIFY
:
2761 return ceph_msg_new(type
, front
, GFP_NOFS
, false);
2762 case CEPH_MSG_OSD_OPREPLY
:
2763 return get_reply(con
, hdr
, skip
);
2765 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type
,
2773 * Wrappers to refcount containing ceph_osd struct
2775 static struct ceph_connection
*get_osd_con(struct ceph_connection
*con
)
2777 struct ceph_osd
*osd
= con
->private;
2783 static void put_osd_con(struct ceph_connection
*con
)
2785 struct ceph_osd
*osd
= con
->private;
2793 * Note: returned pointer is the address of a structure that's
2794 * managed separately. Caller must *not* attempt to free it.
2796 static struct ceph_auth_handshake
*get_authorizer(struct ceph_connection
*con
,
2797 int *proto
, int force_new
)
2799 struct ceph_osd
*o
= con
->private;
2800 struct ceph_osd_client
*osdc
= o
->o_osdc
;
2801 struct ceph_auth_client
*ac
= osdc
->client
->monc
.auth
;
2802 struct ceph_auth_handshake
*auth
= &o
->o_auth
;
2804 if (force_new
&& auth
->authorizer
) {
2805 ceph_auth_destroy_authorizer(ac
, auth
->authorizer
);
2806 auth
->authorizer
= NULL
;
2808 if (!auth
->authorizer
) {
2809 int ret
= ceph_auth_create_authorizer(ac
, CEPH_ENTITY_TYPE_OSD
,
2812 return ERR_PTR(ret
);
2814 int ret
= ceph_auth_update_authorizer(ac
, CEPH_ENTITY_TYPE_OSD
,
2817 return ERR_PTR(ret
);
2819 *proto
= ac
->protocol
;
2825 static int verify_authorizer_reply(struct ceph_connection
*con
, int len
)
2827 struct ceph_osd
*o
= con
->private;
2828 struct ceph_osd_client
*osdc
= o
->o_osdc
;
2829 struct ceph_auth_client
*ac
= osdc
->client
->monc
.auth
;
2831 return ceph_auth_verify_authorizer_reply(ac
, o
->o_auth
.authorizer
, len
);
2834 static int invalidate_authorizer(struct ceph_connection
*con
)
2836 struct ceph_osd
*o
= con
->private;
2837 struct ceph_osd_client
*osdc
= o
->o_osdc
;
2838 struct ceph_auth_client
*ac
= osdc
->client
->monc
.auth
;
2840 ceph_auth_invalidate_authorizer(ac
, CEPH_ENTITY_TYPE_OSD
);
2841 return ceph_monc_validate_auth(&osdc
->client
->monc
);
2844 static const struct ceph_connection_operations osd_con_ops
= {
2847 .dispatch
= dispatch
,
2848 .get_authorizer
= get_authorizer
,
2849 .verify_authorizer_reply
= verify_authorizer_reply
,
2850 .invalidate_authorizer
= invalidate_authorizer
,
2851 .alloc_msg
= alloc_msg
,