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libceph: define a few more helpers
[linux-2.6-block.git] / net / ceph / osd_client.c
CommitLineData
3d14c5d2 1#include <linux/ceph/ceph_debug.h>
f24e9980 2
3d14c5d2 3#include <linux/module.h>
f24e9980
SW		 4#include <linux/err.h>
5#include <linux/highmem.h>
6#include <linux/mm.h>
7#include <linux/pagemap.h>
8#include <linux/slab.h>
9#include <linux/uaccess.h>
68b4476b
YS		 10#ifdef CONFIG_BLOCK
11#include <linux/bio.h>
12#endif
f24e9980 13
3d14c5d2
YS		 14#include <linux/ceph/libceph.h>
15#include <linux/ceph/osd_client.h>
16#include <linux/ceph/messenger.h>
17#include <linux/ceph/decode.h>
18#include <linux/ceph/auth.h>
19#include <linux/ceph/pagelist.h>
f24e9980 20
c16e7869
SW		 21#define OSD_OP_FRONT_LEN 4096
22#define OSD_OPREPLY_FRONT_LEN 512
0d59ab81 23
9e32789f 24static const struct ceph_connection_operations osd_con_ops;
f24e9980 25
f9d25199 26static void __send_queued(struct ceph_osd_client *osdc);
6f6c7006 27static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
a40c4f10
YS		 28static void __register_request(struct ceph_osd_client *osdc,
29 struct ceph_osd_request *req);
30static void __unregister_linger_request(struct ceph_osd_client *osdc,
31 struct ceph_osd_request *req);
56e925b6
SW		 32static void __send_request(struct ceph_osd_client *osdc,
33 struct ceph_osd_request *req);
f24e9980
SW		 34
35/*
36 * Implement client access to distributed object storage cluster.
37 *
38 * All data objects are stored within a cluster/cloud of OSDs, or
39 * "object storage devices." (Note that Ceph OSDs have _nothing_ to
40 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
41 * remote daemons serving up and coordinating consistent and safe
42 * access to storage.
43 *
44 * Cluster membership and the mapping of data objects onto storage devices
45 * are described by the osd map.
46 *
47 * We keep track of pending OSD requests (read, write), resubmit
48 * requests to different OSDs when the cluster topology/data layout
49 * change, or retry the affected requests when the communications
50 * channel with an OSD is reset.
51 */
52
53/*
54 * calculate the mapping of a file extent onto an object, and fill out the
55 * request accordingly. shorten extent as necessary if it crosses an
56 * object boundary.
57 *
58 * fill osd op in request message.
59 */
dbe0fc41 60static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
a19dadfb 61 u64 *objnum, u64 *objoff, u64 *objlen)
f24e9980 62{
60e56f13 63 u64 orig_len = *plen;
d63b77f4 64 int r;
f24e9980 65
60e56f13 66 /* object extent? */
75d1c941
AE		 67 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
68 objoff, objlen);
d63b77f4
SW		 69 if (r < 0)
70 return r;
75d1c941
AE		 71 if (*objlen < orig_len) {
72 *plen = *objlen;
60e56f13
AE		 73 dout(" skipping last %llu, final file extent %llu~%llu\n",
74 orig_len - *plen, off, *plen);
75 }
76
75d1c941 77 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
f24e9980 78
3ff5f385 79 return 0;
f24e9980
SW		 80}
81
c54d47bf
AE		 82static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
83{
84 memset(osd_data, 0, sizeof (*osd_data));
85 osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
86}
87
43bfe5de
AE		 88void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
89 struct page **pages, u64 length, u32 alignment,
90 bool pages_from_pool, bool own_pages)
91{
92 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
93 osd_data->pages = pages;
94 osd_data->length = length;
95 osd_data->alignment = alignment;
96 osd_data->pages_from_pool = pages_from_pool;
97 osd_data->own_pages = own_pages;
98}
99EXPORT_SYMBOL(ceph_osd_data_pages_init);
100
101void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
102 struct ceph_pagelist *pagelist)
103{
104 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
105 osd_data->pagelist = pagelist;
106}
107EXPORT_SYMBOL(ceph_osd_data_pagelist_init);
108
109#ifdef CONFIG_BLOCK
110void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
111 struct bio *bio, size_t bio_length)
112{
113 osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
114 osd_data->bio = bio;
115 osd_data->bio_length = bio_length;
116}
117EXPORT_SYMBOL(ceph_osd_data_bio_init);
118#endif /* CONFIG_BLOCK */
119
c54d47bf
AE		 120static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
121{
122 if (osd_data->type != CEPH_OSD_DATA_TYPE_PAGES)
123 return;
124
125 if (osd_data->own_pages) {
126 int num_pages;
127
128 num_pages = calc_pages_for((u64)osd_data->alignment,
129 (u64)osd_data->length);
130 ceph_release_page_vector(osd_data->pages, num_pages);
131 }
132}
133
f24e9980
SW		 134/*
135 * requests
136 */
415e49a9 137void ceph_osdc_release_request(struct kref *kref)
f24e9980 138{
c54d47bf 139 struct ceph_osd_request *req;
415e49a9 140
c54d47bf 141 req = container_of(kref, struct ceph_osd_request, r_kref);
415e49a9
SW		 142 if (req->r_request)
143 ceph_msg_put(req->r_request);
ace6d3a9 144 if (req->r_reply) {
8921d114 145 ceph_msg_revoke_incoming(req->r_reply);
ab8cb34a 146 ceph_msg_put(req->r_reply);
ace6d3a9 147 }
0fff87ec 148
c54d47bf
AE		 149 ceph_osd_data_release(&req->r_data_in);
150 ceph_osd_data_release(&req->r_data_out);
0fff87ec 151
415e49a9
SW		 152 ceph_put_snap_context(req->r_snapc);
153 if (req->r_mempool)
154 mempool_free(req, req->r_osdc->req_mempool);
155 else
156 kfree(req);
f24e9980 157}
3d14c5d2 158EXPORT_SYMBOL(ceph_osdc_release_request);
68b4476b 159
3499e8a5 160struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
f24e9980 161 struct ceph_snap_context *snapc,
1b83bef2 162 unsigned int num_ops,
3499e8a5 163 bool use_mempool,
54a54007 164 gfp_t gfp_flags)
f24e9980
SW		 165{
166 struct ceph_osd_request *req;
167 struct ceph_msg *msg;
1b83bef2
SW		 168 size_t msg_size;
169
170 msg_size = 4 + 4 + 8 + 8 + 4+8;
171 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
172 msg_size += 1 + 8 + 4 + 4; /* pg_t */
173 msg_size += 4 + MAX_OBJ_NAME_SIZE;
174 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
175 msg_size += 8; /* snapid */
176 msg_size += 8; /* snap_seq */
177 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
178 msg_size += 4;
f24e9980
SW		 179
180 if (use_mempool) {
3499e8a5 181 req = mempool_alloc(osdc->req_mempool, gfp_flags);
f24e9980
SW		 182 memset(req, 0, sizeof(*req));
183 } else {
3499e8a5 184 req = kzalloc(sizeof(*req), gfp_flags);
f24e9980
SW		 185 }
186 if (req == NULL)
a79832f2 187 return NULL;
f24e9980 188
f24e9980
SW		 189 req->r_osdc = osdc;
190 req->r_mempool = use_mempool;
68b4476b 191
415e49a9 192 kref_init(&req->r_kref);
f24e9980
SW		 193 init_completion(&req->r_completion);
194 init_completion(&req->r_safe_completion);
a978fa20 195 RB_CLEAR_NODE(&req->r_node);
f24e9980 196 INIT_LIST_HEAD(&req->r_unsafe_item);
a40c4f10
YS		 197 INIT_LIST_HEAD(&req->r_linger_item);
198 INIT_LIST_HEAD(&req->r_linger_osd);
935b639a 199 INIT_LIST_HEAD(&req->r_req_lru_item);
cd43045c
SW		 200 INIT_LIST_HEAD(&req->r_osd_item);
201
c16e7869
SW		 202 /* create reply message */
203 if (use_mempool)
204 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
205 else
206 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
b61c2763 207 OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
a79832f2 208 if (!msg) {
c16e7869 209 ceph_osdc_put_request(req);
a79832f2 210 return NULL;
c16e7869
SW		 211 }
212 req->r_reply = msg;
213
c54d47bf
AE		 214 ceph_osd_data_init(&req->r_data_in);
215 ceph_osd_data_init(&req->r_data_out);
d50b409f 216
c16e7869 217 /* create request message; allow space for oid */
f24e9980 218 if (use_mempool)
8f3bc053 219 msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
f24e9980 220 else
b61c2763 221 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
a79832f2 222 if (!msg) {
f24e9980 223 ceph_osdc_put_request(req);
a79832f2 224 return NULL;
f24e9980 225 }
68b4476b 226
f24e9980 227 memset(msg->front.iov_base, 0, msg->front.iov_len);
3499e8a5
YS		 228
229 req->r_request = msg;
3499e8a5
YS		 230
231 return req;
232}
3d14c5d2 233EXPORT_SYMBOL(ceph_osdc_alloc_request);
3499e8a5 234
a8dd0a37 235static bool osd_req_opcode_valid(u16 opcode)
68b4476b 236{
a8dd0a37 237 switch (opcode) {
68b4476b 238 case CEPH_OSD_OP_READ:
a8dd0a37 239 case CEPH_OSD_OP_STAT:
4c46459c
AE		 240 case CEPH_OSD_OP_MAPEXT:
241 case CEPH_OSD_OP_MASKTRUNC:
242 case CEPH_OSD_OP_SPARSE_READ:
a9f36c3e 243 case CEPH_OSD_OP_NOTIFY:
a8dd0a37 244 case CEPH_OSD_OP_NOTIFY_ACK:
4c46459c 245 case CEPH_OSD_OP_ASSERT_VER:
a8dd0a37 246 case CEPH_OSD_OP_WRITE:
4c46459c
AE		 247 case CEPH_OSD_OP_WRITEFULL:
248 case CEPH_OSD_OP_TRUNCATE:
249 case CEPH_OSD_OP_ZERO:
250 case CEPH_OSD_OP_DELETE:
251 case CEPH_OSD_OP_APPEND:
a8dd0a37 252 case CEPH_OSD_OP_STARTSYNC:
4c46459c
AE		 253 case CEPH_OSD_OP_SETTRUNC:
254 case CEPH_OSD_OP_TRIMTRUNC:
255 case CEPH_OSD_OP_TMAPUP:
256 case CEPH_OSD_OP_TMAPPUT:
257 case CEPH_OSD_OP_TMAPGET:
258 case CEPH_OSD_OP_CREATE:
a9f36c3e 259 case CEPH_OSD_OP_ROLLBACK:
a8dd0a37 260 case CEPH_OSD_OP_WATCH:
4c46459c
AE		 261 case CEPH_OSD_OP_OMAPGETKEYS:
262 case CEPH_OSD_OP_OMAPGETVALS:
263 case CEPH_OSD_OP_OMAPGETHEADER:
264 case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
4c46459c
AE		 265 case CEPH_OSD_OP_OMAPSETVALS:
266 case CEPH_OSD_OP_OMAPSETHEADER:
267 case CEPH_OSD_OP_OMAPCLEAR:
268 case CEPH_OSD_OP_OMAPRMKEYS:
269 case CEPH_OSD_OP_OMAP_CMP:
270 case CEPH_OSD_OP_CLONERANGE:
271 case CEPH_OSD_OP_ASSERT_SRC_VERSION:
272 case CEPH_OSD_OP_SRC_CMPXATTR:
a9f36c3e 273 case CEPH_OSD_OP_GETXATTR:
4c46459c 274 case CEPH_OSD_OP_GETXATTRS:
a9f36c3e
AE		 275 case CEPH_OSD_OP_CMPXATTR:
276 case CEPH_OSD_OP_SETXATTR:
4c46459c
AE		 277 case CEPH_OSD_OP_SETXATTRS:
278 case CEPH_OSD_OP_RESETXATTRS:
279 case CEPH_OSD_OP_RMXATTR:
280 case CEPH_OSD_OP_PULL:
281 case CEPH_OSD_OP_PUSH:
282 case CEPH_OSD_OP_BALANCEREADS:
283 case CEPH_OSD_OP_UNBALANCEREADS:
284 case CEPH_OSD_OP_SCRUB:
285 case CEPH_OSD_OP_SCRUB_RESERVE:
286 case CEPH_OSD_OP_SCRUB_UNRESERVE:
287 case CEPH_OSD_OP_SCRUB_STOP:
288 case CEPH_OSD_OP_SCRUB_MAP:
289 case CEPH_OSD_OP_WRLOCK:
290 case CEPH_OSD_OP_WRUNLOCK:
291 case CEPH_OSD_OP_RDLOCK:
292 case CEPH_OSD_OP_RDUNLOCK:
293 case CEPH_OSD_OP_UPLOCK:
294 case CEPH_OSD_OP_DNLOCK:
a8dd0a37 295 case CEPH_OSD_OP_CALL:
4c46459c
AE		 296 case CEPH_OSD_OP_PGLS:
297 case CEPH_OSD_OP_PGLS_FILTER:
a8dd0a37
AE		 298 return true;
299 default:
300 return false;
301 }
302}
303
33803f33
AE		 304/*
305 * This is an osd op init function for opcodes that have no data or
306 * other information associated with them. It also serves as a
307 * common init routine for all the other init functions, below.
308 */
309void osd_req_op_init(struct ceph_osd_req_op *op, u16 opcode)
310{
311 BUG_ON(!osd_req_opcode_valid(opcode));
312
313 memset(op, 0, sizeof (*op));
314
315 op->op = opcode;
316}
317
318void osd_req_op_extent_init(struct ceph_osd_req_op *op, u16 opcode,
319 u64 offset, u64 length,
320 u64 truncate_size, u32 truncate_seq)
321{
322 size_t payload_len = 0;
323
324 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
325
326 osd_req_op_init(op, opcode);
327
328 op->extent.offset = offset;
329 op->extent.length = length;
330 op->extent.truncate_size = truncate_size;
331 op->extent.truncate_seq = truncate_seq;
332 if (opcode == CEPH_OSD_OP_WRITE)
333 payload_len += length;
334
335 op->payload_len = payload_len;
336}
337EXPORT_SYMBOL(osd_req_op_extent_init);
338
e5975c7c
AE		 339void osd_req_op_extent_update(struct ceph_osd_req_op *op, u64 length)
340{
341 u64 previous = op->extent.length;
342
343 if (length == previous)
344 return; /* Nothing to do */
345 BUG_ON(length > previous);
346
347 op->extent.length = length;
348 op->payload_len -= previous - length;
349}
350EXPORT_SYMBOL(osd_req_op_extent_update);
351
33803f33
AE		 352void osd_req_op_cls_init(struct ceph_osd_req_op *op, u16 opcode,
353 const char *class, const char *method,
354 const void *request_data, size_t request_data_size)
355{
356 size_t payload_len = 0;
357 size_t size;
358
359 BUG_ON(opcode != CEPH_OSD_OP_CALL);
360
361 osd_req_op_init(op, opcode);
362
363 op->cls.class_name = class;
364 size = strlen(class);
365 BUG_ON(size > (size_t) U8_MAX);
366 op->cls.class_len = size;
367 payload_len += size;
368
369 op->cls.method_name = method;
370 size = strlen(method);
371 BUG_ON(size > (size_t) U8_MAX);
372 op->cls.method_len = size;
373 payload_len += size;
374
375 op->cls.indata = request_data;
376 BUG_ON(request_data_size > (size_t) U32_MAX);
377 op->cls.indata_len = (u32) request_data_size;
378 payload_len += request_data_size;
379
380 op->cls.argc = 0; /* currently unused */
381
382 op->payload_len = payload_len;
383}
384EXPORT_SYMBOL(osd_req_op_cls_init);
385
386void osd_req_op_watch_init(struct ceph_osd_req_op *op, u16 opcode,
387 u64 cookie, u64 version, int flag)
388{
389 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
390
391 osd_req_op_init(op, opcode);
392
393 op->watch.cookie = cookie;
394 /* op->watch.ver = version; */ /* XXX 3847 */
395 op->watch.ver = cpu_to_le64(version);
396 if (opcode == CEPH_OSD_OP_WATCH && flag)
397 op->watch.flag = (u8) 1;
398}
399EXPORT_SYMBOL(osd_req_op_watch_init);
400
a8dd0a37
AE		 401static u64 osd_req_encode_op(struct ceph_osd_request *req,
402 struct ceph_osd_op *dst,
403 struct ceph_osd_req_op *src)
404{
405 u64 out_data_len = 0;
406 struct ceph_pagelist *pagelist;
407
408 if (WARN_ON(!osd_req_opcode_valid(src->op))) {
409 pr_err("unrecognized osd opcode %d\n", src->op);
410
411 return 0;
412 }
413
414 switch (src->op) {
415 case CEPH_OSD_OP_STAT:
416 break;
417 case CEPH_OSD_OP_READ:
418 case CEPH_OSD_OP_WRITE:
419 if (src->op == CEPH_OSD_OP_WRITE)
420 out_data_len = src->extent.length;
421 dst->extent.offset = cpu_to_le64(src->extent.offset);
422 dst->extent.length = cpu_to_le64(src->extent.length);
423 dst->extent.truncate_size =
424 cpu_to_le64(src->extent.truncate_size);
425 dst->extent.truncate_seq =
426 cpu_to_le32(src->extent.truncate_seq);
427 break;
428 case CEPH_OSD_OP_CALL:
429 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
430 BUG_ON(!pagelist);
431 ceph_pagelist_init(pagelist);
432
433 dst->cls.class_len = src->cls.class_len;
434 dst->cls.method_len = src->cls.method_len;
435 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
436 ceph_pagelist_append(pagelist, src->cls.class_name,
437 src->cls.class_len);
438 ceph_pagelist_append(pagelist, src->cls.method_name,
439 src->cls.method_len);
440 ceph_pagelist_append(pagelist, src->cls.indata,
441 src->cls.indata_len);
442
43bfe5de 443 ceph_osd_data_pagelist_init(&req->r_data_out, pagelist);
a8dd0a37
AE		 444 out_data_len = pagelist->length;
445 break;
446 case CEPH_OSD_OP_STARTSYNC:
447 break;
448 case CEPH_OSD_OP_NOTIFY_ACK:
449 case CEPH_OSD_OP_WATCH:
450 dst->watch.cookie = cpu_to_le64(src->watch.cookie);
451 dst->watch.ver = cpu_to_le64(src->watch.ver);
452 dst->watch.flag = src->watch.flag;
453 break;
454 default:
4c46459c 455 pr_err("unsupported osd opcode %s\n",
8f63ca2d 456 ceph_osd_op_name(src->op));
4c46459c 457 WARN_ON(1);
a8dd0a37
AE		 458
459 return 0;
68b4476b 460 }
a8dd0a37 461 dst->op = cpu_to_le16(src->op);
68b4476b 462 dst->payload_len = cpu_to_le32(src->payload_len);
175face2
AE		 463
464 return out_data_len;
68b4476b
YS		 465}
466
3499e8a5
YS		 467/*
468 * build new request AND message
469 *
470 */
471void ceph_osdc_build_request(struct ceph_osd_request *req,
175face2 472 u64 off, unsigned int num_ops,
68b4476b 473 struct ceph_osd_req_op *src_ops,
4d6b250b 474 struct ceph_snap_context *snapc, u64 snap_id,
af77f26c 475 struct timespec *mtime)
3499e8a5
YS		 476{
477 struct ceph_msg *msg = req->r_request;
68b4476b 478 struct ceph_osd_req_op *src_op;
3499e8a5 479 void *p;
1b83bef2 480 size_t msg_size;
3499e8a5 481 int flags = req->r_flags;
f44246e3 482 u64 data_len;
68b4476b 483 int i;
3499e8a5 484
1b83bef2
SW		 485 req->r_num_ops = num_ops;
486 req->r_snapid = snap_id;
f24e9980
SW		 487 req->r_snapc = ceph_get_snap_context(snapc);
488
1b83bef2
SW		 489 /* encode request */
490 msg->hdr.version = cpu_to_le16(4);
491
492 p = msg->front.iov_base;
493 ceph_encode_32(&p, 1); /* client_inc is always 1 */
494 req->r_request_osdmap_epoch = p;
495 p += 4;
496 req->r_request_flags = p;
497 p += 4;
498 if (req->r_flags & CEPH_OSD_FLAG_WRITE)
499 ceph_encode_timespec(p, mtime);
500 p += sizeof(struct ceph_timespec);
501 req->r_request_reassert_version = p;
502 p += sizeof(struct ceph_eversion); /* will get filled in */
503
504 /* oloc */
505 ceph_encode_8(&p, 4);
506 ceph_encode_8(&p, 4);
507 ceph_encode_32(&p, 8 + 4 + 4);
508 req->r_request_pool = p;
509 p += 8;
510 ceph_encode_32(&p, -1); /* preferred */
511 ceph_encode_32(&p, 0); /* key len */
512
513 ceph_encode_8(&p, 1);
514 req->r_request_pgid = p;
515 p += 8 + 4;
516 ceph_encode_32(&p, -1); /* preferred */
517
518 /* oid */
519 ceph_encode_32(&p, req->r_oid_len);
af77f26c 520 memcpy(p, req->r_oid, req->r_oid_len);
1b83bef2 521 dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
af77f26c 522 p += req->r_oid_len;
f24e9980 523
175face2 524 /* ops--can imply data */
1b83bef2 525 ceph_encode_16(&p, num_ops);
68b4476b 526 src_op = src_ops;
1b83bef2 527 req->r_request_ops = p;
175face2 528 data_len = 0;
1b83bef2 529 for (i = 0; i < num_ops; i++, src_op++) {
175face2 530 data_len += osd_req_encode_op(req, p, src_op);
1b83bef2
SW		 531 p += sizeof(struct ceph_osd_op);
532 }
68b4476b 533
1b83bef2
SW		 534 /* snaps */
535 ceph_encode_64(&p, req->r_snapid);
536 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
537 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
538 if (req->r_snapc) {
f24e9980 539 for (i = 0; i < snapc->num_snaps; i++) {
1b83bef2 540 ceph_encode_64(&p, req->r_snapc->snaps[i]);
f24e9980
SW		 541 }
542 }
543
1b83bef2
SW		 544 req->r_request_attempts = p;
545 p += 4;
546
175face2 547 /* data */
0baa1bd9
AE		 548 if (flags & CEPH_OSD_FLAG_WRITE) {
549 u16 data_off;
550
551 /*
552 * The header "data_off" is a hint to the receiver
553 * allowing it to align received data into its
554 * buffers such that there's no need to re-copy
555 * it before writing it to disk (direct I/O).
556 */
557 data_off = (u16) (off & 0xffff);
558 req->r_request->hdr.data_off = cpu_to_le16(data_off);
559 }
f44246e3 560 req->r_request->hdr.data_len = cpu_to_le32(data_len);
c5c6b19d 561
f24e9980 562 BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
6f863e71
SW		 563 msg_size = p - msg->front.iov_base;
564 msg->front.iov_len = msg_size;
565 msg->hdr.front_len = cpu_to_le32(msg_size);
1b83bef2 566
acead002 567 dout("build_request msg_size was %d\n", (int)msg_size);
3499e8a5 568}
3d14c5d2 569EXPORT_SYMBOL(ceph_osdc_build_request);
3499e8a5
YS		 570
571/*
572 * build new request AND message, calculate layout, and adjust file
573 * extent as needed.
574 *
575 * if the file was recently truncated, we include information about its
576 * old and new size so that the object can be updated appropriately. (we
577 * avoid synchronously deleting truncated objects because it's slow.)
578 *
579 * if @do_sync, include a 'startsync' command so that the osd will flush
580 * data quickly.
581 */
582struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
583 struct ceph_file_layout *layout,
584 struct ceph_vino vino,
acead002
AE		 585 u64 off, u64 *plen, int num_ops,
586 struct ceph_osd_req_op *ops,
3499e8a5
YS		 587 int opcode, int flags,
588 struct ceph_snap_context *snapc,
3499e8a5
YS		 589 u32 truncate_seq,
590 u64 truncate_size,
153e5167 591 bool use_mempool)
3499e8a5 592{
68b4476b 593 struct ceph_osd_request *req;
75d1c941
AE		 594 u64 objnum = 0;
595 u64 objoff = 0;
596 u64 objlen = 0;
d18d1e28
AE		 597 u32 object_size;
598 u64 object_base;
6816282d 599 int r;
68b4476b 600
d18d1e28 601 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
68b4476b 602
acead002 603 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
ae7ca4a3 604 GFP_NOFS);
4ad12621 605 if (!req)
6816282d 606 return ERR_PTR(-ENOMEM);
d178a9e7 607 req->r_flags = flags;
3499e8a5
YS		 608
609 /* calculate max write size */
a19dadfb 610 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
3ff5f385
AE		 611 if (r < 0) {
612 ceph_osdc_put_request(req);
6816282d 613 return ERR_PTR(r);
3ff5f385 614 }
a19dadfb 615
d18d1e28
AE		 616 object_size = le32_to_cpu(layout->fl_object_size);
617 object_base = off - objoff;
618 if (truncate_size <= object_base) {
619 truncate_size = 0;
620 } else {
621 truncate_size -= object_base;
622 if (truncate_size > object_size)
623 truncate_size = object_size;
a19dadfb 624 }
d18d1e28 625
b0270324
AE		 626 osd_req_op_extent_init(&ops[0], opcode, objoff, objlen,
627 truncate_size, truncate_seq);
acead002
AE		 628 /*
629 * A second op in the ops array means the caller wants to
630 * also issue a include a 'startsync' command so that the
631 * osd will flush data quickly.
632 */
633 if (num_ops > 1)
b0270324 634 osd_req_op_init(&ops[1], CEPH_OSD_OP_STARTSYNC);
d18d1e28 635
3499e8a5
YS		 636 req->r_file_layout = *layout; /* keep a copy */
637
75d1c941
AE		 638 snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
639 vino.ino, objnum);
dbe0fc41
AE		 640 req->r_oid_len = strlen(req->r_oid);
641
f24e9980
SW		 642 return req;
643}
3d14c5d2 644EXPORT_SYMBOL(ceph_osdc_new_request);
f24e9980
SW		 645
646/*
647 * We keep osd requests in an rbtree, sorted by ->r_tid.
648 */
649static void __insert_request(struct ceph_osd_client *osdc,
650 struct ceph_osd_request *new)
651{
652 struct rb_node **p = &osdc->requests.rb_node;
653 struct rb_node *parent = NULL;
654 struct ceph_osd_request *req = NULL;
655
656 while (*p) {
657 parent = *p;
658 req = rb_entry(parent, struct ceph_osd_request, r_node);
659 if (new->r_tid < req->r_tid)
660 p = &(*p)->rb_left;
661 else if (new->r_tid > req->r_tid)
662 p = &(*p)->rb_right;
663 else
664 BUG();
665 }
666
667 rb_link_node(&new->r_node, parent, p);
668 rb_insert_color(&new->r_node, &osdc->requests);
669}
670
671static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
672 u64 tid)
673{
674 struct ceph_osd_request *req;
675 struct rb_node *n = osdc->requests.rb_node;
676
677 while (n) {
678 req = rb_entry(n, struct ceph_osd_request, r_node);
679 if (tid < req->r_tid)
680 n = n->rb_left;
681 else if (tid > req->r_tid)
682 n = n->rb_right;
683 else
684 return req;
685 }
686 return NULL;
687}
688
689static struct ceph_osd_request *
690__lookup_request_ge(struct ceph_osd_client *osdc,
691 u64 tid)
692{
693 struct ceph_osd_request *req;
694 struct rb_node *n = osdc->requests.rb_node;
695
696 while (n) {
697 req = rb_entry(n, struct ceph_osd_request, r_node);
698 if (tid < req->r_tid) {
699 if (!n->rb_left)
700 return req;
701 n = n->rb_left;
702 } else if (tid > req->r_tid) {
703 n = n->rb_right;
704 } else {
705 return req;
706 }
707 }
708 return NULL;
709}
710
6f6c7006
SW		 711/*
712 * Resubmit requests pending on the given osd.
713 */
714static void __kick_osd_requests(struct ceph_osd_client *osdc,
715 struct ceph_osd *osd)
716{
a40c4f10 717 struct ceph_osd_request *req, *nreq;
e02493c0 718 LIST_HEAD(resend);
6f6c7006
SW		 719 int err;
720
721 dout("__kick_osd_requests osd%d\n", osd->o_osd);
722 err = __reset_osd(osdc, osd);
685a7555 723 if (err)
6f6c7006 724 return;
e02493c0
AE		 725 /*
726 * Build up a list of requests to resend by traversing the
727 * osd's list of requests. Requests for a given object are
728 * sent in tid order, and that is also the order they're
729 * kept on this list. Therefore all requests that are in
730 * flight will be found first, followed by all requests that
731 * have not yet been sent. And to resend requests while
732 * preserving this order we will want to put any sent
733 * requests back on the front of the osd client's unsent
734 * list.
735 *
736 * So we build a separate ordered list of already-sent
737 * requests for the affected osd and splice it onto the
738 * front of the osd client's unsent list. Once we've seen a
739 * request that has not yet been sent we're done. Those
740 * requests are already sitting right where they belong.
741 */
6f6c7006 742 list_for_each_entry(req, &osd->o_requests, r_osd_item) {
e02493c0
AE		 743 if (!req->r_sent)
744 break;
745 list_move_tail(&req->r_req_lru_item, &resend);
746 dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
6f6c7006 747 osd->o_osd);
a40c4f10
YS		 748 if (!req->r_linger)
749 req->r_flags |= CEPH_OSD_FLAG_RETRY;
750 }
e02493c0 751 list_splice(&resend, &osdc->req_unsent);
a40c4f10 752
e02493c0
AE		 753 /*
754 * Linger requests are re-registered before sending, which
755 * sets up a new tid for each. We add them to the unsent
756 * list at the end to keep things in tid order.
757 */
a40c4f10
YS		 758 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
759 r_linger_osd) {
77f38e0e
SW		 760 /*
761 * reregister request prior to unregistering linger so
762 * that r_osd is preserved.
763 */
764 BUG_ON(!list_empty(&req->r_req_lru_item));
a40c4f10 765 __register_request(osdc, req);
e02493c0 766 list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
ad885927 767 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
77f38e0e 768 __unregister_linger_request(osdc, req);
a40c4f10
YS		 769 dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
770 osd->o_osd);
6f6c7006
SW		 771 }
772}
773
f24e9980 774/*
81b024e7 775 * If the osd connection drops, we need to resubmit all requests.
f24e9980
SW		 776 */
777static void osd_reset(struct ceph_connection *con)
778{
779 struct ceph_osd *osd = con->private;
780 struct ceph_osd_client *osdc;
781
782 if (!osd)
783 return;
784 dout("osd_reset osd%d\n", osd->o_osd);
785 osdc = osd->o_osdc;
f24e9980 786 down_read(&osdc->map_sem);
83aff95e
SW		 787 mutex_lock(&osdc->request_mutex);
788 __kick_osd_requests(osdc, osd);
f9d25199 789 __send_queued(osdc);
83aff95e 790 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 791 up_read(&osdc->map_sem);
792}
793
794/*
795 * Track open sessions with osds.
796 */
e10006f8 797static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
f24e9980
SW		 798{
799 struct ceph_osd *osd;
800
801 osd = kzalloc(sizeof(*osd), GFP_NOFS);
802 if (!osd)
803 return NULL;
804
805 atomic_set(&osd->o_ref, 1);
806 osd->o_osdc = osdc;
e10006f8 807 osd->o_osd = onum;
f407731d 808 RB_CLEAR_NODE(&osd->o_node);
f24e9980 809 INIT_LIST_HEAD(&osd->o_requests);
a40c4f10 810 INIT_LIST_HEAD(&osd->o_linger_requests);
f5a2041b 811 INIT_LIST_HEAD(&osd->o_osd_lru);
f24e9980
SW		 812 osd->o_incarnation = 1;
813
b7a9e5dd 814 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
4e7a5dcd 815
422d2cb8 816 INIT_LIST_HEAD(&osd->o_keepalive_item);
f24e9980
SW		 817 return osd;
818}
819
820static struct ceph_osd *get_osd(struct ceph_osd *osd)
821{
822 if (atomic_inc_not_zero(&osd->o_ref)) {
823 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
824 atomic_read(&osd->o_ref));
825 return osd;
826 } else {
827 dout("get_osd %p FAIL\n", osd);
828 return NULL;
829 }
830}
831
832static void put_osd(struct ceph_osd *osd)
833{
834 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
835 atomic_read(&osd->o_ref) - 1);
a255651d 836 if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
79494d1b
SW		 837 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
838
27859f97 839 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
f24e9980 840 kfree(osd);
79494d1b 841 }
f24e9980
SW		 842}
843
844/*
845 * remove an osd from our map
846 */
f5a2041b 847static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 848{
f5a2041b 849 dout("__remove_osd %p\n", osd);
f24e9980
SW		 850 BUG_ON(!list_empty(&osd->o_requests));
851 rb_erase(&osd->o_node, &osdc->osds);
f5a2041b 852 list_del_init(&osd->o_osd_lru);
f24e9980
SW		 853 ceph_con_close(&osd->o_con);
854 put_osd(osd);
855}
856
aca420bc
SW		 857static void remove_all_osds(struct ceph_osd_client *osdc)
858{
048a9d2d 859 dout("%s %p\n", __func__, osdc);
aca420bc
SW		 860 mutex_lock(&osdc->request_mutex);
861 while (!RB_EMPTY_ROOT(&osdc->osds)) {
862 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
863 struct ceph_osd, o_node);
864 __remove_osd(osdc, osd);
865 }
866 mutex_unlock(&osdc->request_mutex);
867}
868
f5a2041b
YS		 869static void __move_osd_to_lru(struct ceph_osd_client *osdc,
870 struct ceph_osd *osd)
871{
872 dout("__move_osd_to_lru %p\n", osd);
873 BUG_ON(!list_empty(&osd->o_osd_lru));
874 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
3d14c5d2 875 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
f5a2041b
YS		 876}
877
878static void __remove_osd_from_lru(struct ceph_osd *osd)
879{
880 dout("__remove_osd_from_lru %p\n", osd);
881 if (!list_empty(&osd->o_osd_lru))
882 list_del_init(&osd->o_osd_lru);
883}
884
aca420bc 885static void remove_old_osds(struct ceph_osd_client *osdc)
f5a2041b
YS		 886{
887 struct ceph_osd *osd, *nosd;
888
889 dout("__remove_old_osds %p\n", osdc);
890 mutex_lock(&osdc->request_mutex);
891 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
aca420bc 892 if (time_before(jiffies, osd->lru_ttl))
f5a2041b
YS		 893 break;
894 __remove_osd(osdc, osd);
895 }
896 mutex_unlock(&osdc->request_mutex);
897}
898
f24e9980
SW		 899/*
900 * reset osd connect
901 */
f5a2041b 902static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
f24e9980 903{
c3acb181 904 struct ceph_entity_addr *peer_addr;
f24e9980 905
f5a2041b 906 dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
a40c4f10
YS		 907 if (list_empty(&osd->o_requests) &&
908 list_empty(&osd->o_linger_requests)) {
f5a2041b 909 __remove_osd(osdc, osd);
c3acb181
AE		 910
911 return -ENODEV;
912 }
913
914 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
915 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
916 !ceph_con_opened(&osd->o_con)) {
917 struct ceph_osd_request *req;
918
87b315a5
SW		 919 dout(" osd addr hasn't changed and connection never opened,"
920 " letting msgr retry");
921 /* touch each r_stamp for handle_timeout()'s benfit */
922 list_for_each_entry(req, &osd->o_requests, r_osd_item)
923 req->r_stamp = jiffies;
c3acb181
AE		 924
925 return -EAGAIN;
f24e9980 926 }
c3acb181
AE		 927
928 ceph_con_close(&osd->o_con);
929 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
930 osd->o_incarnation++;
931
932 return 0;
f24e9980
SW		 933}
934
935static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
936{
937 struct rb_node **p = &osdc->osds.rb_node;
938 struct rb_node *parent = NULL;
939 struct ceph_osd *osd = NULL;
940
aca420bc 941 dout("__insert_osd %p osd%d\n", new, new->o_osd);
f24e9980
SW		 942 while (*p) {
943 parent = *p;
944 osd = rb_entry(parent, struct ceph_osd, o_node);
945 if (new->o_osd < osd->o_osd)
946 p = &(*p)->rb_left;
947 else if (new->o_osd > osd->o_osd)
948 p = &(*p)->rb_right;
949 else
950 BUG();
951 }
952
953 rb_link_node(&new->o_node, parent, p);
954 rb_insert_color(&new->o_node, &osdc->osds);
955}
956
957static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
958{
959 struct ceph_osd *osd;
960 struct rb_node *n = osdc->osds.rb_node;
961
962 while (n) {
963 osd = rb_entry(n, struct ceph_osd, o_node);
964 if (o < osd->o_osd)
965 n = n->rb_left;
966 else if (o > osd->o_osd)
967 n = n->rb_right;
968 else
969 return osd;
970 }
971 return NULL;
972}
973
422d2cb8
YS		 974static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
975{
976 schedule_delayed_work(&osdc->timeout_work,
3d14c5d2 977 osdc->client->options->osd_keepalive_timeout * HZ);
422d2cb8
YS		 978}
979
980static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
981{
982 cancel_delayed_work(&osdc->timeout_work);
983}
f24e9980
SW		 984
985/*
986 * Register request, assign tid. If this is the first request, set up
987 * the timeout event.
988 */
a40c4f10
YS		 989static void __register_request(struct ceph_osd_client *osdc,
990 struct ceph_osd_request *req)
f24e9980 991{
f24e9980 992 req->r_tid = ++osdc->last_tid;
6df058c0 993 req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
77f38e0e 994 dout("__register_request %p tid %lld\n", req, req->r_tid);
f24e9980
SW		 995 __insert_request(osdc, req);
996 ceph_osdc_get_request(req);
997 osdc->num_requests++;
f24e9980 998 if (osdc->num_requests == 1) {
422d2cb8
YS		 999 dout(" first request, scheduling timeout\n");
1000 __schedule_osd_timeout(osdc);
f24e9980 1001 }
a40c4f10
YS		 1002}
1003
f24e9980
SW		 1004/*
1005 * called under osdc->request_mutex
1006 */
1007static void __unregister_request(struct ceph_osd_client *osdc,
1008 struct ceph_osd_request *req)
1009{
35f9f8a0
SW		 1010 if (RB_EMPTY_NODE(&req->r_node)) {
1011 dout("__unregister_request %p tid %lld not registered\n",
1012 req, req->r_tid);
1013 return;
1014 }
1015
f24e9980
SW		 1016 dout("__unregister_request %p tid %lld\n", req, req->r_tid);
1017 rb_erase(&req->r_node, &osdc->requests);
1018 osdc->num_requests--;
1019
0ba6478d
SW		 1020 if (req->r_osd) {
1021 /* make sure the original request isn't in flight. */
6740a845 1022 ceph_msg_revoke(req->r_request);
0ba6478d
SW		 1023
1024 list_del_init(&req->r_osd_item);
a40c4f10
YS		 1025 if (list_empty(&req->r_osd->o_requests) &&
1026 list_empty(&req->r_osd->o_linger_requests)) {
1027 dout("moving osd to %p lru\n", req->r_osd);
f5a2041b 1028 __move_osd_to_lru(osdc, req->r_osd);
a40c4f10 1029 }
fbdb9190 1030 if (list_empty(&req->r_linger_item))
a40c4f10 1031 req->r_osd = NULL;
0ba6478d 1032 }
f24e9980 1033
7d5f2481 1034 list_del_init(&req->r_req_lru_item);
f24e9980
SW		 1035 ceph_osdc_put_request(req);
1036
422d2cb8
YS		 1037 if (osdc->num_requests == 0) {
1038 dout(" no requests, canceling timeout\n");
1039 __cancel_osd_timeout(osdc);
f24e9980
SW		 1040 }
1041}
1042
1043/*
1044 * Cancel a previously queued request message
1045 */
1046static void __cancel_request(struct ceph_osd_request *req)
1047{
6bc18876 1048 if (req->r_sent && req->r_osd) {
6740a845 1049 ceph_msg_revoke(req->r_request);
f24e9980
SW		 1050 req->r_sent = 0;
1051 }
1052}
1053
a40c4f10
YS		 1054static void __register_linger_request(struct ceph_osd_client *osdc,
1055 struct ceph_osd_request *req)
1056{
1057 dout("__register_linger_request %p\n", req);
1058 list_add_tail(&req->r_linger_item, &osdc->req_linger);
6194ea89
SW		 1059 if (req->r_osd)
1060 list_add_tail(&req->r_linger_osd,
1061 &req->r_osd->o_linger_requests);
a40c4f10
YS		 1062}
1063
1064static void __unregister_linger_request(struct ceph_osd_client *osdc,
1065 struct ceph_osd_request *req)
1066{
1067 dout("__unregister_linger_request %p\n", req);
61c74035 1068 list_del_init(&req->r_linger_item);
a40c4f10 1069 if (req->r_osd) {
a40c4f10
YS		 1070 list_del_init(&req->r_linger_osd);
1071
1072 if (list_empty(&req->r_osd->o_requests) &&
1073 list_empty(&req->r_osd->o_linger_requests)) {
1074 dout("moving osd to %p lru\n", req->r_osd);
1075 __move_osd_to_lru(osdc, req->r_osd);
1076 }
fbdb9190
SW		 1077 if (list_empty(&req->r_osd_item))
1078 req->r_osd = NULL;
a40c4f10
YS		 1079 }
1080}
1081
1082void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
1083 struct ceph_osd_request *req)
1084{
1085 mutex_lock(&osdc->request_mutex);
1086 if (req->r_linger) {
1087 __unregister_linger_request(osdc, req);
1088 ceph_osdc_put_request(req);
1089 }
1090 mutex_unlock(&osdc->request_mutex);
1091}
1092EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
1093
1094void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
1095 struct ceph_osd_request *req)
1096{
1097 if (!req->r_linger) {
1098 dout("set_request_linger %p\n", req);
1099 req->r_linger = 1;
1100 /*
1101 * caller is now responsible for calling
1102 * unregister_linger_request
1103 */
1104 ceph_osdc_get_request(req);
1105 }
1106}
1107EXPORT_SYMBOL(ceph_osdc_set_request_linger);
1108
f24e9980
SW		 1109/*
1110 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
1111 * (as needed), and set the request r_osd appropriately. If there is
25985edc 1112 * no up osd, set r_osd to NULL. Move the request to the appropriate list
6f6c7006 1113 * (unsent, homeless) or leave on in-flight lru.
f24e9980
SW		 1114 *
1115 * Return 0 if unchanged, 1 if changed, or negative on error.
1116 *
1117 * Caller should hold map_sem for read and request_mutex.
1118 */
6f6c7006 1119static int __map_request(struct ceph_osd_client *osdc,
38d6453c 1120 struct ceph_osd_request *req, int force_resend)
f24e9980 1121{
5b191d99 1122 struct ceph_pg pgid;
d85b7056
SW		 1123 int acting[CEPH_PG_MAX_SIZE];
1124 int o = -1, num = 0;
f24e9980 1125 int err;
f24e9980 1126
6f6c7006 1127 dout("map_request %p tid %lld\n", req, req->r_tid);
41766f87
AE		 1128 err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
1129 ceph_file_layout_pg_pool(req->r_file_layout));
6f6c7006
SW		 1130 if (err) {
1131 list_move(&req->r_req_lru_item, &osdc->req_notarget);
f24e9980 1132 return err;
6f6c7006 1133 }
7740a42f
SW		 1134 req->r_pgid = pgid;
1135
d85b7056
SW		 1136 err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
1137 if (err > 0) {
1138 o = acting[0];
1139 num = err;
1140 }
f24e9980 1141
38d6453c
SW		 1142 if ((!force_resend &&
1143 req->r_osd && req->r_osd->o_osd == o &&
d85b7056
SW		 1144 req->r_sent >= req->r_osd->o_incarnation &&
1145 req->r_num_pg_osds == num &&
1146 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
f24e9980
SW		 1147 (req->r_osd == NULL && o == -1))
1148 return 0; /* no change */
1149
5b191d99
SW		 1150 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1151 req->r_tid, pgid.pool, pgid.seed, o,
f24e9980
SW		 1152 req->r_osd ? req->r_osd->o_osd : -1);
1153
d85b7056
SW		 1154 /* record full pg acting set */
1155 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
1156 req->r_num_pg_osds = num;
1157
f24e9980
SW		 1158 if (req->r_osd) {
1159 __cancel_request(req);
1160 list_del_init(&req->r_osd_item);
f24e9980
SW		 1161 req->r_osd = NULL;
1162 }
1163
1164 req->r_osd = __lookup_osd(osdc, o);
1165 if (!req->r_osd && o >= 0) {
c99eb1c7 1166 err = -ENOMEM;
e10006f8 1167 req->r_osd = create_osd(osdc, o);
6f6c7006
SW		 1168 if (!req->r_osd) {
1169 list_move(&req->r_req_lru_item, &osdc->req_notarget);
c99eb1c7 1170 goto out;
6f6c7006 1171 }
f24e9980 1172
6f6c7006 1173 dout("map_request osd %p is osd%d\n", req->r_osd, o);
f24e9980
SW		 1174 __insert_osd(osdc, req->r_osd);
1175
b7a9e5dd
SW		 1176 ceph_con_open(&req->r_osd->o_con,
1177 CEPH_ENTITY_TYPE_OSD, o,
1178 &osdc->osdmap->osd_addr[o]);
f24e9980
SW		 1179 }
1180
f5a2041b
YS		 1181 if (req->r_osd) {
1182 __remove_osd_from_lru(req->r_osd);
ad885927
AE		 1183 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
1184 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
6f6c7006 1185 } else {
ad885927 1186 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
f5a2041b 1187 }
d85b7056 1188 err = 1; /* osd or pg changed */
f24e9980
SW		 1189
1190out:
f24e9980
SW		 1191 return err;
1192}
1193
1194/*
1195 * caller should hold map_sem (for read) and request_mutex
1196 */
56e925b6
SW		 1197static void __send_request(struct ceph_osd_client *osdc,
1198 struct ceph_osd_request *req)
f24e9980 1199{
1b83bef2 1200 void *p;
f24e9980 1201
1b83bef2
SW		 1202 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
1203 req, req->r_tid, req->r_osd->o_osd, req->r_flags,
1204 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
1205
1206 /* fill in message content that changes each time we send it */
1207 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
1208 put_unaligned_le32(req->r_flags, req->r_request_flags);
1209 put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
1210 p = req->r_request_pgid;
1211 ceph_encode_64(&p, req->r_pgid.pool);
1212 ceph_encode_32(&p, req->r_pgid.seed);
1213 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
1214 memcpy(req->r_request_reassert_version, &req->r_reassert_version,
1215 sizeof(req->r_reassert_version));
2169aea6 1216
3dd72fc0 1217 req->r_stamp = jiffies;
07a27e22 1218 list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
f24e9980
SW		 1219
1220 ceph_msg_get(req->r_request); /* send consumes a ref */
1221 ceph_con_send(&req->r_osd->o_con, req->r_request);
1222 req->r_sent = req->r_osd->o_incarnation;
f24e9980
SW		 1223}
1224
6f6c7006
SW		 1225/*
1226 * Send any requests in the queue (req_unsent).
1227 */
f9d25199 1228static void __send_queued(struct ceph_osd_client *osdc)
6f6c7006
SW		 1229{
1230 struct ceph_osd_request *req, *tmp;
1231
f9d25199
AE		 1232 dout("__send_queued\n");
1233 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
6f6c7006 1234 __send_request(osdc, req);
6f6c7006
SW		 1235}
1236
f24e9980
SW		 1237/*
1238 * Timeout callback, called every N seconds when 1 or more osd
1239 * requests has been active for more than N seconds. When this
1240 * happens, we ping all OSDs with requests who have timed out to
1241 * ensure any communications channel reset is detected. Reset the
1242 * request timeouts another N seconds in the future as we go.
1243 * Reschedule the timeout event another N seconds in future (unless
1244 * there are no open requests).
1245 */
1246static void handle_timeout(struct work_struct *work)
1247{
1248 struct ceph_osd_client *osdc =
1249 container_of(work, struct ceph_osd_client, timeout_work.work);
83aff95e 1250 struct ceph_osd_request *req;
f24e9980 1251 struct ceph_osd *osd;
422d2cb8 1252 unsigned long keepalive =
3d14c5d2 1253 osdc->client->options->osd_keepalive_timeout * HZ;
422d2cb8 1254 struct list_head slow_osds;
f24e9980
SW		 1255 dout("timeout\n");
1256 down_read(&osdc->map_sem);
1257
1258 ceph_monc_request_next_osdmap(&osdc->client->monc);
1259
1260 mutex_lock(&osdc->request_mutex);
f24e9980 1261
422d2cb8
YS		 1262 /*
1263 * ping osds that are a bit slow. this ensures that if there
1264 * is a break in the TCP connection we will notice, and reopen
1265 * a connection with that osd (from the fault callback).
1266 */
1267 INIT_LIST_HEAD(&slow_osds);
1268 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
3dd72fc0 1269 if (time_before(jiffies, req->r_stamp + keepalive))
422d2cb8
YS		 1270 break;
1271
1272 osd = req->r_osd;
1273 BUG_ON(!osd);
1274 dout(" tid %llu is slow, will send keepalive on osd%d\n",
f24e9980 1275 req->r_tid, osd->o_osd);
422d2cb8
YS		 1276 list_move_tail(&osd->o_keepalive_item, &slow_osds);
1277 }
1278 while (!list_empty(&slow_osds)) {
1279 osd = list_entry(slow_osds.next, struct ceph_osd,
1280 o_keepalive_item);
1281 list_del_init(&osd->o_keepalive_item);
f24e9980
SW		 1282 ceph_con_keepalive(&osd->o_con);
1283 }
1284
422d2cb8 1285 __schedule_osd_timeout(osdc);
f9d25199 1286 __send_queued(osdc);
f24e9980 1287 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1288 up_read(&osdc->map_sem);
1289}
1290
f5a2041b
YS		 1291static void handle_osds_timeout(struct work_struct *work)
1292{
1293 struct ceph_osd_client *osdc =
1294 container_of(work, struct ceph_osd_client,
1295 osds_timeout_work.work);
1296 unsigned long delay =
3d14c5d2 1297 osdc->client->options->osd_idle_ttl * HZ >> 2;
f5a2041b
YS		 1298
1299 dout("osds timeout\n");
1300 down_read(&osdc->map_sem);
aca420bc 1301 remove_old_osds(osdc);
f5a2041b
YS		 1302 up_read(&osdc->map_sem);
1303
1304 schedule_delayed_work(&osdc->osds_timeout_work,
1305 round_jiffies_relative(delay));
1306}
1307
25845472
SW		 1308static void complete_request(struct ceph_osd_request *req)
1309{
1310 if (req->r_safe_callback)
1311 req->r_safe_callback(req, NULL);
1312 complete_all(&req->r_safe_completion); /* fsync waiter */
1313}
1314
f24e9980
SW		 1315/*
1316 * handle osd op reply. either call the callback if it is specified,
1317 * or do the completion to wake up the waiting thread.
1318 */
350b1c32
SW		 1319static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
1320 struct ceph_connection *con)
f24e9980 1321{
1b83bef2 1322 void *p, *end;
f24e9980
SW		 1323 struct ceph_osd_request *req;
1324 u64 tid;
1b83bef2
SW		 1325 int object_len;
1326 int numops, payload_len, flags;
0ceed5db 1327 s32 result;
1b83bef2
SW		 1328 s32 retry_attempt;
1329 struct ceph_pg pg;
1330 int err;
1331 u32 reassert_epoch;
1332 u64 reassert_version;
1333 u32 osdmap_epoch;
0d5af164 1334 int already_completed;
9fc6e064 1335 u32 bytes;
1b83bef2 1336 int i;
f24e9980 1337
6df058c0 1338 tid = le64_to_cpu(msg->hdr.tid);
1b83bef2
SW		 1339 dout("handle_reply %p tid %llu\n", msg, tid);
1340
1341 p = msg->front.iov_base;
1342 end = p + msg->front.iov_len;
1343
1344 ceph_decode_need(&p, end, 4, bad);
1345 object_len = ceph_decode_32(&p);
1346 ceph_decode_need(&p, end, object_len, bad);
1347 p += object_len;
1348
ef4859d6 1349 err = ceph_decode_pgid(&p, end, &pg);
1b83bef2 1350 if (err)
f24e9980 1351 goto bad;
1b83bef2
SW		 1352
1353 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
1354 flags = ceph_decode_64(&p);
1355 result = ceph_decode_32(&p);
1356 reassert_epoch = ceph_decode_32(&p);
1357 reassert_version = ceph_decode_64(&p);
1358 osdmap_epoch = ceph_decode_32(&p);
1359
f24e9980
SW		 1360 /* lookup */
1361 mutex_lock(&osdc->request_mutex);
1362 req = __lookup_request(osdc, tid);
1363 if (req == NULL) {
1364 dout("handle_reply tid %llu dne\n", tid);
8058fd45 1365 goto bad_mutex;
f24e9980
SW		 1366 }
1367 ceph_osdc_get_request(req);
1b83bef2
SW		 1368
1369 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
1370 req, result);
1371
1372 ceph_decode_need(&p, end, 4, bad);
1373 numops = ceph_decode_32(&p);
1374 if (numops > CEPH_OSD_MAX_OP)
1375 goto bad_put;
1376 if (numops != req->r_num_ops)
1377 goto bad_put;
1378 payload_len = 0;
1379 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad);
1380 for (i = 0; i < numops; i++) {
1381 struct ceph_osd_op *op = p;
1382 int len;
1383
1384 len = le32_to_cpu(op->payload_len);
1385 req->r_reply_op_len[i] = len;
1386 dout(" op %d has %d bytes\n", i, len);
1387 payload_len += len;
1388 p += sizeof(*op);
1389 }
9fc6e064
AE		 1390 bytes = le32_to_cpu(msg->hdr.data_len);
1391 if (payload_len != bytes) {
1b83bef2 1392 pr_warning("sum of op payload lens %d != data_len %d",
9fc6e064 1393 payload_len, bytes);
1b83bef2
SW		 1394 goto bad_put;
1395 }
1396
1397 ceph_decode_need(&p, end, 4 + numops * 4, bad);
1398 retry_attempt = ceph_decode_32(&p);
1399 for (i = 0; i < numops; i++)
1400 req->r_reply_op_result[i] = ceph_decode_32(&p);
f24e9980 1401
f24e9980 1402 if (!req->r_got_reply) {
f24e9980 1403
1b83bef2 1404 req->r_result = result;
f24e9980
SW		 1405 dout("handle_reply result %d bytes %d\n", req->r_result,
1406 bytes);
1407 if (req->r_result == 0)
1408 req->r_result = bytes;
1409
1410 /* in case this is a write and we need to replay, */
1b83bef2
SW		 1411 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
1412 req->r_reassert_version.version = cpu_to_le64(reassert_version);
f24e9980
SW		 1413
1414 req->r_got_reply = 1;
1415 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
1416 dout("handle_reply tid %llu dup ack\n", tid);
34b43a56 1417 mutex_unlock(&osdc->request_mutex);
f24e9980
SW		 1418 goto done;
1419 }
1420
1421 dout("handle_reply tid %llu flags %d\n", tid, flags);
1422
a40c4f10
YS		 1423 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
1424 __register_linger_request(osdc, req);
1425
f24e9980 1426 /* either this is a read, or we got the safe response */
0ceed5db
SW		 1427 if (result < 0 ||
1428 (flags & CEPH_OSD_FLAG_ONDISK) ||
f24e9980
SW		 1429 ((flags & CEPH_OSD_FLAG_WRITE) == 0))
1430 __unregister_request(osdc, req);
1431
0d5af164
AE		 1432 already_completed = req->r_completed;
1433 req->r_completed = 1;
f24e9980 1434 mutex_unlock(&osdc->request_mutex);
0d5af164
AE		 1435 if (already_completed)
1436 goto done;
f24e9980
SW		 1437
1438 if (req->r_callback)
1439 req->r_callback(req, msg);
1440 else
03066f23 1441 complete_all(&req->r_completion);
f24e9980 1442
25845472
SW		 1443 if (flags & CEPH_OSD_FLAG_ONDISK)
1444 complete_request(req);
f24e9980
SW		 1445
1446done:
a40c4f10 1447 dout("req=%p req->r_linger=%d\n", req, req->r_linger);
f24e9980
SW		 1448 ceph_osdc_put_request(req);
1449 return;
1450
1b83bef2
SW		 1451bad_put:
1452 ceph_osdc_put_request(req);
8058fd45
AE		 1453bad_mutex:
1454 mutex_unlock(&osdc->request_mutex);
f24e9980 1455bad:
1b83bef2
SW		 1456 pr_err("corrupt osd_op_reply got %d %d\n",
1457 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
9ec7cab1 1458 ceph_msg_dump(msg);
f24e9980
SW		 1459}
1460
6f6c7006 1461static void reset_changed_osds(struct ceph_osd_client *osdc)
f24e9980 1462{
f24e9980 1463 struct rb_node *p, *n;
f24e9980 1464
6f6c7006
SW		 1465 for (p = rb_first(&osdc->osds); p; p = n) {
1466 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
f24e9980 1467
6f6c7006
SW		 1468 n = rb_next(p);
1469 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
1470 memcmp(&osd->o_con.peer_addr,
1471 ceph_osd_addr(osdc->osdmap,
1472 osd->o_osd),
1473 sizeof(struct ceph_entity_addr)) != 0)
1474 __reset_osd(osdc, osd);
f24e9980 1475 }
422d2cb8
YS		 1476}
1477
1478/*
6f6c7006
SW		 1479 * Requeue requests whose mapping to an OSD has changed. If requests map to
1480 * no osd, request a new map.
422d2cb8 1481 *
e6d50f67 1482 * Caller should hold map_sem for read.
422d2cb8 1483 */
38d6453c 1484static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
422d2cb8 1485{
a40c4f10 1486 struct ceph_osd_request *req, *nreq;
6f6c7006
SW		 1487 struct rb_node *p;
1488 int needmap = 0;
1489 int err;
422d2cb8 1490
38d6453c 1491 dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
422d2cb8 1492 mutex_lock(&osdc->request_mutex);
6194ea89 1493 for (p = rb_first(&osdc->requests); p; ) {
6f6c7006 1494 req = rb_entry(p, struct ceph_osd_request, r_node);
6194ea89 1495 p = rb_next(p);
ab60b16d
AE		 1496
1497 /*
1498 * For linger requests that have not yet been
1499 * registered, move them to the linger list; they'll
1500 * be sent to the osd in the loop below. Unregister
1501 * the request before re-registering it as a linger
1502 * request to ensure the __map_request() below
1503 * will decide it needs to be sent.
1504 */
1505 if (req->r_linger && list_empty(&req->r_linger_item)) {
1506 dout("%p tid %llu restart on osd%d\n",
1507 req, req->r_tid,
1508 req->r_osd ? req->r_osd->o_osd : -1);
1509 __unregister_request(osdc, req);
1510 __register_linger_request(osdc, req);
1511 continue;
1512 }
1513
38d6453c 1514 err = __map_request(osdc, req, force_resend);
6f6c7006
SW		 1515 if (err < 0)
1516 continue; /* error */
1517 if (req->r_osd == NULL) {
1518 dout("%p tid %llu maps to no osd\n", req, req->r_tid);
1519 needmap++; /* request a newer map */
1520 } else if (err > 0) {
6194ea89
SW		 1521 if (!req->r_linger) {
1522 dout("%p tid %llu requeued on osd%d\n", req,
1523 req->r_tid,
1524 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1525 req->r_flags |= CEPH_OSD_FLAG_RETRY;
6194ea89
SW		 1526 }
1527 }
a40c4f10
YS		 1528 }
1529
1530 list_for_each_entry_safe(req, nreq, &osdc->req_linger,
1531 r_linger_item) {
1532 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
1533
38d6453c 1534 err = __map_request(osdc, req, force_resend);
ab60b16d 1535 dout("__map_request returned %d\n", err);
a40c4f10
YS		 1536 if (err == 0)
1537 continue; /* no change and no osd was specified */
1538 if (err < 0)
1539 continue; /* hrm! */
1540 if (req->r_osd == NULL) {
1541 dout("tid %llu maps to no valid osd\n", req->r_tid);
1542 needmap++; /* request a newer map */
1543 continue;
6f6c7006 1544 }
a40c4f10
YS		 1545
1546 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
1547 req->r_osd ? req->r_osd->o_osd : -1);
a40c4f10 1548 __register_request(osdc, req);
c89ce05e 1549 __unregister_linger_request(osdc, req);
6f6c7006 1550 }
f24e9980
SW		 1551 mutex_unlock(&osdc->request_mutex);
1552
1553 if (needmap) {
1554 dout("%d requests for down osds, need new map\n", needmap);
1555 ceph_monc_request_next_osdmap(&osdc->client->monc);
1556 }
e6d50f67 1557 reset_changed_osds(osdc);
422d2cb8 1558}
6f6c7006
SW		 1559
1560
f24e9980
SW		 1561/*
1562 * Process updated osd map.
1563 *
1564 * The message contains any number of incremental and full maps, normally
1565 * indicating some sort of topology change in the cluster. Kick requests
1566 * off to different OSDs as needed.
1567 */
1568void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
1569{
1570 void *p, *end, *next;
1571 u32 nr_maps, maplen;
1572 u32 epoch;
1573 struct ceph_osdmap *newmap = NULL, *oldmap;
1574 int err;
1575 struct ceph_fsid fsid;
1576
1577 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
1578 p = msg->front.iov_base;
1579 end = p + msg->front.iov_len;
1580
1581 /* verify fsid */
1582 ceph_decode_need(&p, end, sizeof(fsid), bad);
1583 ceph_decode_copy(&p, &fsid, sizeof(fsid));
0743304d
SW		 1584 if (ceph_check_fsid(osdc->client, &fsid) < 0)
1585 return;
f24e9980
SW		 1586
1587 down_write(&osdc->map_sem);
1588
1589 /* incremental maps */
1590 ceph_decode_32_safe(&p, end, nr_maps, bad);
1591 dout(" %d inc maps\n", nr_maps);
1592 while (nr_maps > 0) {
1593 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 1594 epoch = ceph_decode_32(&p);
1595 maplen = ceph_decode_32(&p);
f24e9980
SW		 1596 ceph_decode_need(&p, end, maplen, bad);
1597 next = p + maplen;
1598 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
1599 dout("applying incremental map %u len %d\n",
1600 epoch, maplen);
1601 newmap = osdmap_apply_incremental(&p, next,
1602 osdc->osdmap,
15d9882c 1603 &osdc->client->msgr);
f24e9980
SW		 1604 if (IS_ERR(newmap)) {
1605 err = PTR_ERR(newmap);
1606 goto bad;
1607 }
30dc6381 1608 BUG_ON(!newmap);
f24e9980
SW		 1609 if (newmap != osdc->osdmap) {
1610 ceph_osdmap_destroy(osdc->osdmap);
1611 osdc->osdmap = newmap;
1612 }
38d6453c 1613 kick_requests(osdc, 0);
f24e9980
SW		 1614 } else {
1615 dout("ignoring incremental map %u len %d\n",
1616 epoch, maplen);
1617 }
1618 p = next;
1619 nr_maps--;
1620 }
1621 if (newmap)
1622 goto done;
1623
1624 /* full maps */
1625 ceph_decode_32_safe(&p, end, nr_maps, bad);
1626 dout(" %d full maps\n", nr_maps);
1627 while (nr_maps) {
1628 ceph_decode_need(&p, end, 2*sizeof(u32), bad);
c89136ea
SW		 1629 epoch = ceph_decode_32(&p);
1630 maplen = ceph_decode_32(&p);
f24e9980
SW		 1631 ceph_decode_need(&p, end, maplen, bad);
1632 if (nr_maps > 1) {
1633 dout("skipping non-latest full map %u len %d\n",
1634 epoch, maplen);
1635 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
1636 dout("skipping full map %u len %d, "
1637 "older than our %u\n", epoch, maplen,
1638 osdc->osdmap->epoch);
1639 } else {
38d6453c
SW		 1640 int skipped_map = 0;
1641
f24e9980
SW		 1642 dout("taking full map %u len %d\n", epoch, maplen);
1643 newmap = osdmap_decode(&p, p+maplen);
1644 if (IS_ERR(newmap)) {
1645 err = PTR_ERR(newmap);
1646 goto bad;
1647 }
30dc6381 1648 BUG_ON(!newmap);
f24e9980
SW		 1649 oldmap = osdc->osdmap;
1650 osdc->osdmap = newmap;
38d6453c
SW		 1651 if (oldmap) {
1652 if (oldmap->epoch + 1 < newmap->epoch)
1653 skipped_map = 1;
f24e9980 1654 ceph_osdmap_destroy(oldmap);
38d6453c
SW		 1655 }
1656 kick_requests(osdc, skipped_map);
f24e9980
SW		 1657 }
1658 p += maplen;
1659 nr_maps--;
1660 }
1661
1662done:
1663 downgrade_write(&osdc->map_sem);
1664 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
cd634fb6
SW		 1665
1666 /*
1667 * subscribe to subsequent osdmap updates if full to ensure
1668 * we find out when we are no longer full and stop returning
1669 * ENOSPC.
1670 */
1671 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
1672 ceph_monc_request_next_osdmap(&osdc->client->monc);
1673
f9d25199
AE		 1674 mutex_lock(&osdc->request_mutex);
1675 __send_queued(osdc);
1676 mutex_unlock(&osdc->request_mutex);
f24e9980 1677 up_read(&osdc->map_sem);
03066f23 1678 wake_up_all(&osdc->client->auth_wq);
f24e9980
SW		 1679 return;
1680
1681bad:
1682 pr_err("osdc handle_map corrupt msg\n");
9ec7cab1 1683 ceph_msg_dump(msg);
f24e9980
SW		 1684 up_write(&osdc->map_sem);
1685 return;
1686}
1687
a40c4f10
YS		 1688/*
1689 * watch/notify callback event infrastructure
1690 *
1691 * These callbacks are used both for watch and notify operations.
1692 */
1693static void __release_event(struct kref *kref)
1694{
1695 struct ceph_osd_event *event =
1696 container_of(kref, struct ceph_osd_event, kref);
1697
1698 dout("__release_event %p\n", event);
1699 kfree(event);
1700}
1701
1702static void get_event(struct ceph_osd_event *event)
1703{
1704 kref_get(&event->kref);
1705}
1706
1707void ceph_osdc_put_event(struct ceph_osd_event *event)
1708{
1709 kref_put(&event->kref, __release_event);
1710}
1711EXPORT_SYMBOL(ceph_osdc_put_event);
1712
1713static void __insert_event(struct ceph_osd_client *osdc,
1714 struct ceph_osd_event *new)
1715{
1716 struct rb_node **p = &osdc->event_tree.rb_node;
1717 struct rb_node *parent = NULL;
1718 struct ceph_osd_event *event = NULL;
1719
1720 while (*p) {
1721 parent = *p;
1722 event = rb_entry(parent, struct ceph_osd_event, node);
1723 if (new->cookie < event->cookie)
1724 p = &(*p)->rb_left;
1725 else if (new->cookie > event->cookie)
1726 p = &(*p)->rb_right;
1727 else
1728 BUG();
1729 }
1730
1731 rb_link_node(&new->node, parent, p);
1732 rb_insert_color(&new->node, &osdc->event_tree);
1733}
1734
1735static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
1736 u64 cookie)
1737{
1738 struct rb_node **p = &osdc->event_tree.rb_node;
1739 struct rb_node *parent = NULL;
1740 struct ceph_osd_event *event = NULL;
1741
1742 while (*p) {
1743 parent = *p;
1744 event = rb_entry(parent, struct ceph_osd_event, node);
1745 if (cookie < event->cookie)
1746 p = &(*p)->rb_left;
1747 else if (cookie > event->cookie)
1748 p = &(*p)->rb_right;
1749 else
1750 return event;
1751 }
1752 return NULL;
1753}
1754
1755static void __remove_event(struct ceph_osd_event *event)
1756{
1757 struct ceph_osd_client *osdc = event->osdc;
1758
1759 if (!RB_EMPTY_NODE(&event->node)) {
1760 dout("__remove_event removed %p\n", event);
1761 rb_erase(&event->node, &osdc->event_tree);
1762 ceph_osdc_put_event(event);
1763 } else {
1764 dout("__remove_event didn't remove %p\n", event);
1765 }
1766}
1767
1768int ceph_osdc_create_event(struct ceph_osd_client *osdc,
1769 void (*event_cb)(u64, u64, u8, void *),
3c663bbd 1770 void *data, struct ceph_osd_event **pevent)
a40c4f10
YS		 1771{
1772 struct ceph_osd_event *event;
1773
1774 event = kmalloc(sizeof(*event), GFP_NOIO);
1775 if (!event)
1776 return -ENOMEM;
1777
1778 dout("create_event %p\n", event);
1779 event->cb = event_cb;
3c663bbd 1780 event->one_shot = 0;
a40c4f10
YS		 1781 event->data = data;
1782 event->osdc = osdc;
1783 INIT_LIST_HEAD(&event->osd_node);
3ee5234d 1784 RB_CLEAR_NODE(&event->node);
a40c4f10
YS		 1785 kref_init(&event->kref); /* one ref for us */
1786 kref_get(&event->kref); /* one ref for the caller */
a40c4f10
YS		 1787
1788 spin_lock(&osdc->event_lock);
1789 event->cookie = ++osdc->event_count;
1790 __insert_event(osdc, event);
1791 spin_unlock(&osdc->event_lock);
1792
1793 *pevent = event;
1794 return 0;
1795}
1796EXPORT_SYMBOL(ceph_osdc_create_event);
1797
1798void ceph_osdc_cancel_event(struct ceph_osd_event *event)
1799{
1800 struct ceph_osd_client *osdc = event->osdc;
1801
1802 dout("cancel_event %p\n", event);
1803 spin_lock(&osdc->event_lock);
1804 __remove_event(event);
1805 spin_unlock(&osdc->event_lock);
1806 ceph_osdc_put_event(event); /* caller's */
1807}
1808EXPORT_SYMBOL(ceph_osdc_cancel_event);
1809
1810
1811static void do_event_work(struct work_struct *work)
1812{
1813 struct ceph_osd_event_work *event_work =
1814 container_of(work, struct ceph_osd_event_work, work);
1815 struct ceph_osd_event *event = event_work->event;
1816 u64 ver = event_work->ver;
1817 u64 notify_id = event_work->notify_id;
1818 u8 opcode = event_work->opcode;
1819
1820 dout("do_event_work completing %p\n", event);
1821 event->cb(ver, notify_id, opcode, event->data);
a40c4f10
YS		 1822 dout("do_event_work completed %p\n", event);
1823 ceph_osdc_put_event(event);
1824 kfree(event_work);
1825}
1826
1827
1828/*
1829 * Process osd watch notifications
1830 */
3c663bbd
AE		 1831static void handle_watch_notify(struct ceph_osd_client *osdc,
1832 struct ceph_msg *msg)
a40c4f10
YS		 1833{
1834 void *p, *end;
1835 u8 proto_ver;
1836 u64 cookie, ver, notify_id;
1837 u8 opcode;
1838 struct ceph_osd_event *event;
1839 struct ceph_osd_event_work *event_work;
1840
1841 p = msg->front.iov_base;
1842 end = p + msg->front.iov_len;
1843
1844 ceph_decode_8_safe(&p, end, proto_ver, bad);
1845 ceph_decode_8_safe(&p, end, opcode, bad);
1846 ceph_decode_64_safe(&p, end, cookie, bad);
1847 ceph_decode_64_safe(&p, end, ver, bad);
1848 ceph_decode_64_safe(&p, end, notify_id, bad);
1849
1850 spin_lock(&osdc->event_lock);
1851 event = __find_event(osdc, cookie);
1852 if (event) {
3c663bbd 1853 BUG_ON(event->one_shot);
a40c4f10 1854 get_event(event);
a40c4f10
YS		 1855 }
1856 spin_unlock(&osdc->event_lock);
1857 dout("handle_watch_notify cookie %lld ver %lld event %p\n",
1858 cookie, ver, event);
1859 if (event) {
1860 event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
a40c4f10
YS		 1861 if (!event_work) {
1862 dout("ERROR: could not allocate event_work\n");
1863 goto done_err;
1864 }
6b0ae409 1865 INIT_WORK(&event_work->work, do_event_work);
a40c4f10
YS		 1866 event_work->event = event;
1867 event_work->ver = ver;
1868 event_work->notify_id = notify_id;
1869 event_work->opcode = opcode;
1870 if (!queue_work(osdc->notify_wq, &event_work->work)) {
1871 dout("WARNING: failed to queue notify event work\n");
1872 goto done_err;
1873 }
1874 }
1875
1876 return;
1877
1878done_err:
a40c4f10
YS		 1879 ceph_osdc_put_event(event);
1880 return;
1881
1882bad:
1883 pr_err("osdc handle_watch_notify corrupt msg\n");
1884 return;
1885}
1886
70636773
AE		 1887static void ceph_osdc_msg_data_set(struct ceph_msg *msg,
1888 struct ceph_osd_data *osd_data)
f24e9980 1889{
0fff87ec 1890 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
f1baeb2b 1891 BUG_ON(osd_data->length > (u64) SIZE_MAX);
ebf18f47 1892 if (osd_data->length)
70636773
AE		 1893 ceph_msg_data_set_pages(msg, osd_data->pages,
1894 osd_data->length, osd_data->alignment);
9a5e6d09
AE		 1895 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
1896 BUG_ON(!osd_data->pagelist->length);
1897 ceph_msg_data_set_pagelist(msg, osd_data->pagelist);
68b4476b 1898#ifdef CONFIG_BLOCK
0fff87ec 1899 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
a1930804 1900 ceph_msg_data_set_bio(msg, osd_data->bio, osd_data->bio_length);
68b4476b 1901#endif
2ac2b7a6 1902 } else {
0fff87ec 1903 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
2ac2b7a6 1904 }
70636773
AE		 1905}
1906
1907/*
1908 * Register request, send initial attempt.
1909 */
1910int ceph_osdc_start_request(struct ceph_osd_client *osdc,
1911 struct ceph_osd_request *req,
1912 bool nofail)
1913{
1914 int rc = 0;
1915
1916 /* Set up response incoming data and request outgoing data fields */
1917
1918 ceph_osdc_msg_data_set(req->r_reply, &req->r_data_in);
1919 ceph_osdc_msg_data_set(req->r_request, &req->r_data_out);
f24e9980 1920
f24e9980
SW		 1921 down_read(&osdc->map_sem);
1922 mutex_lock(&osdc->request_mutex);
dc4b870c 1923 __register_request(osdc, req);
92451b49
AE		 1924 WARN_ON(req->r_sent);
1925 rc = __map_request(osdc, req, 0);
1926 if (rc < 0) {
1927 if (nofail) {
1928 dout("osdc_start_request failed map, "
1929 " will retry %lld\n", req->r_tid);
1930 rc = 0;
f24e9980 1931 }
92451b49 1932 goto out_unlock;
f24e9980 1933 }
92451b49
AE		 1934 if (req->r_osd == NULL) {
1935 dout("send_request %p no up osds in pg\n", req);
1936 ceph_monc_request_next_osdmap(&osdc->client->monc);
1937 } else {
7e2766a1 1938 __send_queued(osdc);
92451b49
AE		 1939 }
1940 rc = 0;
234af26f 1941out_unlock:
f24e9980
SW		 1942 mutex_unlock(&osdc->request_mutex);
1943 up_read(&osdc->map_sem);
1944 return rc;
1945}
3d14c5d2 1946EXPORT_SYMBOL(ceph_osdc_start_request);
f24e9980
SW		 1947
1948/*
1949 * wait for a request to complete
1950 */
1951int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
1952 struct ceph_osd_request *req)
1953{
1954 int rc;
1955
1956 rc = wait_for_completion_interruptible(&req->r_completion);
1957 if (rc < 0) {
1958 mutex_lock(&osdc->request_mutex);
1959 __cancel_request(req);
529cfcc4 1960 __unregister_request(osdc, req);
f24e9980 1961 mutex_unlock(&osdc->request_mutex);
25845472 1962 complete_request(req);
529cfcc4 1963 dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
f24e9980
SW		 1964 return rc;
1965 }
1966
1967 dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
1968 return req->r_result;
1969}
3d14c5d2 1970EXPORT_SYMBOL(ceph_osdc_wait_request);
f24e9980
SW		 1971
1972/*
1973 * sync - wait for all in-flight requests to flush. avoid starvation.
1974 */
1975void ceph_osdc_sync(struct ceph_osd_client *osdc)
1976{
1977 struct ceph_osd_request *req;
1978 u64 last_tid, next_tid = 0;
1979
1980 mutex_lock(&osdc->request_mutex);
1981 last_tid = osdc->last_tid;
1982 while (1) {
1983 req = __lookup_request_ge(osdc, next_tid);
1984 if (!req)
1985 break;
1986 if (req->r_tid > last_tid)
1987 break;
1988
1989 next_tid = req->r_tid + 1;
1990 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
1991 continue;
1992
1993 ceph_osdc_get_request(req);
1994 mutex_unlock(&osdc->request_mutex);
1995 dout("sync waiting on tid %llu (last is %llu)\n",
1996 req->r_tid, last_tid);
1997 wait_for_completion(&req->r_safe_completion);
1998 mutex_lock(&osdc->request_mutex);
1999 ceph_osdc_put_request(req);
2000 }
2001 mutex_unlock(&osdc->request_mutex);
2002 dout("sync done (thru tid %llu)\n", last_tid);
2003}
3d14c5d2 2004EXPORT_SYMBOL(ceph_osdc_sync);
f24e9980
SW		 2005
2006/*
2007 * init, shutdown
2008 */
2009int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
2010{
2011 int err;
2012
2013 dout("init\n");
2014 osdc->client = client;
2015 osdc->osdmap = NULL;
2016 init_rwsem(&osdc->map_sem);
2017 init_completion(&osdc->map_waiters);
2018 osdc->last_requested_map = 0;
2019 mutex_init(&osdc->request_mutex);
f24e9980
SW		 2020 osdc->last_tid = 0;
2021 osdc->osds = RB_ROOT;
f5a2041b 2022 INIT_LIST_HEAD(&osdc->osd_lru);
f24e9980 2023 osdc->requests = RB_ROOT;
422d2cb8 2024 INIT_LIST_HEAD(&osdc->req_lru);
6f6c7006
SW		 2025 INIT_LIST_HEAD(&osdc->req_unsent);
2026 INIT_LIST_HEAD(&osdc->req_notarget);
a40c4f10 2027 INIT_LIST_HEAD(&osdc->req_linger);
f24e9980
SW		 2028 osdc->num_requests = 0;
2029 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
f5a2041b 2030 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
a40c4f10
YS		 2031 spin_lock_init(&osdc->event_lock);
2032 osdc->event_tree = RB_ROOT;
2033 osdc->event_count = 0;
f5a2041b
YS		 2034
2035 schedule_delayed_work(&osdc->osds_timeout_work,
3d14c5d2 2036 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
f24e9980 2037
5f44f142 2038 err = -ENOMEM;
f24e9980
SW		 2039 osdc->req_mempool = mempool_create_kmalloc_pool(10,
2040 sizeof(struct ceph_osd_request));
2041 if (!osdc->req_mempool)
5f44f142 2042 goto out;
f24e9980 2043
d50b409f
SW		 2044 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2045 OSD_OP_FRONT_LEN, 10, true,
4f48280e 2046 "osd_op");
f24e9980 2047 if (err < 0)
5f44f142 2048 goto out_mempool;
d50b409f 2049 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4f48280e
SW		 2050 OSD_OPREPLY_FRONT_LEN, 10, true,
2051 "osd_op_reply");
c16e7869
SW		 2052 if (err < 0)
2053 goto out_msgpool;
a40c4f10
YS		 2054
2055 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2056 if (IS_ERR(osdc->notify_wq)) {
2057 err = PTR_ERR(osdc->notify_wq);
2058 osdc->notify_wq = NULL;
2059 goto out_msgpool;
2060 }
f24e9980 2061 return 0;
5f44f142 2062
c16e7869
SW		 2063out_msgpool:
2064 ceph_msgpool_destroy(&osdc->msgpool_op);
5f44f142
SW		 2065out_mempool:
2066 mempool_destroy(osdc->req_mempool);
2067out:
2068 return err;
f24e9980
SW		 2069}
2070
2071void ceph_osdc_stop(struct ceph_osd_client *osdc)
2072{
a40c4f10
YS		 2073 flush_workqueue(osdc->notify_wq);
2074 destroy_workqueue(osdc->notify_wq);
f24e9980 2075 cancel_delayed_work_sync(&osdc->timeout_work);
f5a2041b 2076 cancel_delayed_work_sync(&osdc->osds_timeout_work);
f24e9980
SW		 2077 if (osdc->osdmap) {
2078 ceph_osdmap_destroy(osdc->osdmap);
2079 osdc->osdmap = NULL;
2080 }
aca420bc 2081 remove_all_osds(osdc);
f24e9980
SW		 2082 mempool_destroy(osdc->req_mempool);
2083 ceph_msgpool_destroy(&osdc->msgpool_op);
c16e7869 2084 ceph_msgpool_destroy(&osdc->msgpool_op_reply);
f24e9980
SW		 2085}
2086
2087/*
2088 * Read some contiguous pages. If we cross a stripe boundary, shorten
2089 * *plen. Return number of bytes read, or error.
2090 */
2091int ceph_osdc_readpages(struct ceph_osd_client *osdc,
2092 struct ceph_vino vino, struct ceph_file_layout *layout,
2093 u64 off, u64 *plen,
2094 u32 truncate_seq, u64 truncate_size,
b7495fc2 2095 struct page **pages, int num_pages, int page_align)
f24e9980
SW		 2096{
2097 struct ceph_osd_request *req;
acead002 2098 struct ceph_osd_req_op op;
f24e9980
SW		 2099 int rc = 0;
2100
2101 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
2102 vino.snap, off, *plen);
acead002 2103 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1, &op,
f24e9980 2104 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
acead002 2105 NULL, truncate_seq, truncate_size,
153e5167 2106 false);
6816282d
SW		 2107 if (IS_ERR(req))
2108 return PTR_ERR(req);
f24e9980
SW		 2109
2110 /* it may be a short read due to an object boundary */
0fff87ec 2111
43bfe5de
AE		 2112 ceph_osd_data_pages_init(&req->r_data_in, pages, *plen, page_align,
2113 false, false);
f24e9980 2114
e0c59487 2115 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
43bfe5de 2116 off, *plen, *plen, page_align);
f24e9980 2117
02ee07d3
AE		 2118 ceph_osdc_build_request(req, off, 1, &op, NULL, vino.snap, NULL);
2119
f24e9980
SW		 2120 rc = ceph_osdc_start_request(osdc, req, false);
2121 if (!rc)
2122 rc = ceph_osdc_wait_request(osdc, req);
2123
2124 ceph_osdc_put_request(req);
2125 dout("readpages result %d\n", rc);
2126 return rc;
2127}
3d14c5d2 2128EXPORT_SYMBOL(ceph_osdc_readpages);
f24e9980
SW		 2129
2130/*
2131 * do a synchronous write on N pages
2132 */
2133int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
2134 struct ceph_file_layout *layout,
2135 struct ceph_snap_context *snapc,
2136 u64 off, u64 len,
2137 u32 truncate_seq, u64 truncate_size,
2138 struct timespec *mtime,
24808826 2139 struct page **pages, int num_pages)
f24e9980
SW		 2140{
2141 struct ceph_osd_request *req;
acead002 2142 struct ceph_osd_req_op op;
f24e9980 2143 int rc = 0;
b7495fc2 2144 int page_align = off & ~PAGE_MASK;
f24e9980 2145
acead002
AE		 2146 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
2147 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1, &op,
f24e9980 2148 CEPH_OSD_OP_WRITE,
24808826 2149 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
acead002 2150 snapc, truncate_seq, truncate_size,
153e5167 2151 true);
6816282d
SW		 2152 if (IS_ERR(req))
2153 return PTR_ERR(req);
f24e9980
SW		 2154
2155 /* it may be a short write due to an object boundary */
43bfe5de
AE		 2156 ceph_osd_data_pages_init(&req->r_data_out, pages, len, page_align,
2157 false, false);
2158 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
f24e9980 2159
02ee07d3
AE		 2160 ceph_osdc_build_request(req, off, 1, &op, snapc, CEPH_NOSNAP, mtime);
2161
87f979d3 2162 rc = ceph_osdc_start_request(osdc, req, true);
f24e9980
SW		 2163 if (!rc)
2164 rc = ceph_osdc_wait_request(osdc, req);
2165
2166 ceph_osdc_put_request(req);
2167 if (rc == 0)
2168 rc = len;
2169 dout("writepages result %d\n", rc);
2170 return rc;
2171}
3d14c5d2 2172EXPORT_SYMBOL(ceph_osdc_writepages);
f24e9980
SW		 2173
2174/*
2175 * handle incoming message
2176 */
2177static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
2178{
2179 struct ceph_osd *osd = con->private;
32c895e7 2180 struct ceph_osd_client *osdc;
f24e9980
SW		 2181 int type = le16_to_cpu(msg->hdr.type);
2182
2183 if (!osd)
4a32f93d 2184 goto out;
32c895e7 2185 osdc = osd->o_osdc;
f24e9980
SW		 2186
2187 switch (type) {
2188 case CEPH_MSG_OSD_MAP:
2189 ceph_osdc_handle_map(osdc, msg);
2190 break;
2191 case CEPH_MSG_OSD_OPREPLY:
350b1c32 2192 handle_reply(osdc, msg, con);
f24e9980 2193 break;
a40c4f10
YS		 2194 case CEPH_MSG_WATCH_NOTIFY:
2195 handle_watch_notify(osdc, msg);
2196 break;
f24e9980
SW		 2197
2198 default:
2199 pr_err("received unknown message type %d %s\n", type,
2200 ceph_msg_type_name(type));
2201 }
4a32f93d 2202out:
f24e9980
SW		 2203 ceph_msg_put(msg);
2204}
2205
5b3a4db3 2206/*
21b667f6
SW		 2207 * lookup and return message for incoming reply. set up reply message
2208 * pages.
5b3a4db3
SW		 2209 */
2210static struct ceph_msg *get_reply(struct ceph_connection *con,
2450418c
YS		 2211 struct ceph_msg_header *hdr,
2212 int *skip)
f24e9980
SW		 2213{
2214 struct ceph_osd *osd = con->private;
2215 struct ceph_osd_client *osdc = osd->o_osdc;
2450418c 2216 struct ceph_msg *m;
0547a9b3 2217 struct ceph_osd_request *req;
5b3a4db3
SW		 2218 int front = le32_to_cpu(hdr->front_len);
2219 int data_len = le32_to_cpu(hdr->data_len);
0547a9b3 2220 u64 tid;
f24e9980 2221
0547a9b3
YS		 2222 tid = le64_to_cpu(hdr->tid);
2223 mutex_lock(&osdc->request_mutex);
2224 req = __lookup_request(osdc, tid);
2225 if (!req) {
2226 *skip = 1;
2227 m = NULL;
756a16a5
SW		 2228 dout("get_reply unknown tid %llu from osd%d\n", tid,
2229 osd->o_osd);
0547a9b3
YS		 2230 goto out;
2231 }
c16e7869 2232
ace6d3a9 2233 if (req->r_reply->con)
8921d114 2234 dout("%s revoking msg %p from old con %p\n", __func__,
ace6d3a9
AE		 2235 req->r_reply, req->r_reply->con);
2236 ceph_msg_revoke_incoming(req->r_reply);
0547a9b3 2237
c16e7869
SW		 2238 if (front > req->r_reply->front.iov_len) {
2239 pr_warning("get_reply front %d > preallocated %d\n",
2240 front, (int)req->r_reply->front.iov_len);
b61c2763 2241 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
a79832f2 2242 if (!m)
c16e7869
SW		 2243 goto out;
2244 ceph_msg_put(req->r_reply);
2245 req->r_reply = m;
2246 }
2247 m = ceph_msg_get(req->r_reply);
2248
0547a9b3 2249 if (data_len > 0) {
0fff87ec
AE		 2250 struct ceph_osd_data *osd_data = &req->r_data_in;
2251
2252 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
0fff87ec 2253 if (osd_data->pages &&
e0c59487 2254 unlikely(osd_data->length < data_len)) {
2ac2b7a6 2255
e0c59487
AE		 2256 pr_warning("tid %lld reply has %d bytes "
2257 "we had only %llu bytes ready\n",
2258 tid, data_len, osd_data->length);
2ac2b7a6
AE		 2259 *skip = 1;
2260 ceph_msg_put(m);
2261 m = NULL;
2262 goto out;
2263 }
2ac2b7a6 2264 }
0547a9b3 2265 }
5b3a4db3 2266 *skip = 0;
c16e7869 2267 dout("get_reply tid %lld %p\n", tid, m);
0547a9b3
YS		 2268
2269out:
2270 mutex_unlock(&osdc->request_mutex);
2450418c 2271 return m;
5b3a4db3
SW		 2272
2273}
2274
2275static struct ceph_msg *alloc_msg(struct ceph_connection *con,
2276 struct ceph_msg_header *hdr,
2277 int *skip)
2278{
2279 struct ceph_osd *osd = con->private;
2280 int type = le16_to_cpu(hdr->type);
2281 int front = le32_to_cpu(hdr->front_len);
2282
1c20f2d2 2283 *skip = 0;
5b3a4db3
SW		 2284 switch (type) {
2285 case CEPH_MSG_OSD_MAP:
a40c4f10 2286 case CEPH_MSG_WATCH_NOTIFY:
b61c2763 2287 return ceph_msg_new(type, front, GFP_NOFS, false);
5b3a4db3
SW		 2288 case CEPH_MSG_OSD_OPREPLY:
2289 return get_reply(con, hdr, skip);
2290 default:
2291 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
2292 osd->o_osd);
2293 *skip = 1;
2294 return NULL;
2295 }
f24e9980
SW		 2296}
2297
2298/*
2299 * Wrappers to refcount containing ceph_osd struct
2300 */
2301static struct ceph_connection *get_osd_con(struct ceph_connection *con)
2302{
2303 struct ceph_osd *osd = con->private;
2304 if (get_osd(osd))
2305 return con;
2306 return NULL;
2307}
2308
2309static void put_osd_con(struct ceph_connection *con)
2310{
2311 struct ceph_osd *osd = con->private;
2312 put_osd(osd);
2313}
2314
4e7a5dcd
SW		 2315/*
2316 * authentication
2317 */
a3530df3
AE		 2318/*
2319 * Note: returned pointer is the address of a structure that's
2320 * managed separately. Caller must *not* attempt to free it.
2321 */
2322static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
8f43fb53 2323 int *proto, int force_new)
4e7a5dcd
SW		 2324{
2325 struct ceph_osd *o = con->private;
2326 struct ceph_osd_client *osdc = o->o_osdc;
2327 struct ceph_auth_client *ac = osdc->client->monc.auth;
74f1869f 2328 struct ceph_auth_handshake *auth = &o->o_auth;
4e7a5dcd 2329
74f1869f 2330 if (force_new && auth->authorizer) {
27859f97 2331 ceph_auth_destroy_authorizer(ac, auth->authorizer);
74f1869f
AE		 2332 auth->authorizer = NULL;
2333 }
27859f97
SW		 2334 if (!auth->authorizer) {
2335 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2336 auth);
4e7a5dcd 2337 if (ret)
a3530df3 2338 return ERR_PTR(ret);
27859f97
SW		 2339 } else {
2340 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
0bed9b5c
SW		 2341 auth);
2342 if (ret)
2343 return ERR_PTR(ret);
4e7a5dcd 2344 }
4e7a5dcd 2345 *proto = ac->protocol;
74f1869f 2346
a3530df3 2347 return auth;
4e7a5dcd
SW		 2348}
2349
2350
2351static int verify_authorizer_reply(struct ceph_connection *con, int len)
2352{
2353 struct ceph_osd *o = con->private;
2354 struct ceph_osd_client *osdc = o->o_osdc;
2355 struct ceph_auth_client *ac = osdc->client->monc.auth;
2356
27859f97 2357 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4e7a5dcd
SW		 2358}
2359
9bd2e6f8
SW		 2360static int invalidate_authorizer(struct ceph_connection *con)
2361{
2362 struct ceph_osd *o = con->private;
2363 struct ceph_osd_client *osdc = o->o_osdc;
2364 struct ceph_auth_client *ac = osdc->client->monc.auth;
2365
27859f97 2366 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
9bd2e6f8
SW		 2367 return ceph_monc_validate_auth(&osdc->client->monc);
2368}
4e7a5dcd 2369
9e32789f 2370static const struct ceph_connection_operations osd_con_ops = {
f24e9980
SW		 2371 .get = get_osd_con,
2372 .put = put_osd_con,
2373 .dispatch = dispatch,
4e7a5dcd
SW		 2374 .get_authorizer = get_authorizer,
2375 .verify_authorizer_reply = verify_authorizer_reply,
9bd2e6f8 2376 .invalidate_authorizer = invalidate_authorizer,
f24e9980 2377 .alloc_msg = alloc_msg,
81b024e7 2378 .fault = osd_reset,
f24e9980 2379};
Linux 6.x block layer and io_uring tree(s)