osd_client.c 68.0 KB
Newer Older
1

2
#include <linux/ceph/ceph_debug.h>
S
Sage Weil 已提交
3

4
#include <linux/module.h>
S
Sage Weil 已提交
5 6 7 8 9 10
#include <linux/err.h>
#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
11 12 13
#ifdef CONFIG_BLOCK
#include <linux/bio.h>
#endif
S
Sage Weil 已提交
14

15 16 17 18 19 20
#include <linux/ceph/libceph.h>
#include <linux/ceph/osd_client.h>
#include <linux/ceph/messenger.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/pagelist.h>
S
Sage Weil 已提交
21

S
Sage Weil 已提交
22 23
#define OSD_OP_FRONT_LEN	4096
#define OSD_OPREPLY_FRONT_LEN	512
24

25 26
static struct kmem_cache	*ceph_osd_request_cache;

27
static const struct ceph_connection_operations osd_con_ops;
S
Sage Weil 已提交
28

A
Alex Elder 已提交
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 32 33 34
static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req);
static void __unregister_linger_request(struct ceph_osd_client *osdc,
					struct ceph_osd_request *req);
35 36
static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req);
S
Sage Weil 已提交
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

/*
 * Implement client access to distributed object storage cluster.
 *
 * All data objects are stored within a cluster/cloud of OSDs, or
 * "object storage devices."  (Note that Ceph OSDs have _nothing_ to
 * do with the T10 OSD extensions to SCSI.)  Ceph OSDs are simply
 * remote daemons serving up and coordinating consistent and safe
 * access to storage.
 *
 * Cluster membership and the mapping of data objects onto storage devices
 * are described by the osd map.
 *
 * We keep track of pending OSD requests (read, write), resubmit
 * requests to different OSDs when the cluster topology/data layout
 * change, or retry the affected requests when the communications
 * channel with an OSD is reset.
 */

/*
 * calculate the mapping of a file extent onto an object, and fill out the
 * request accordingly.  shorten extent as necessary if it crosses an
 * object boundary.
 *
 * 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)
S
Sage Weil 已提交
65
{
66
	u64 orig_len = *plen;
S
Sage Weil 已提交
67
	int r;
S
Sage Weil 已提交
68

69
	/* object extent? */
70 71
	r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
					  objoff, objlen);
S
Sage Weil 已提交
72 73
	if (r < 0)
		return r;
74 75
	if (*objlen < orig_len) {
		*plen = *objlen;
76 77 78 79
		dout(" skipping last %llu, final file extent %llu~%llu\n",
		     orig_len - *plen, off, *plen);
	}

80
	dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
S
Sage Weil 已提交
81

82
	return 0;
S
Sage Weil 已提交
83 84
}

A
Alex Elder 已提交
85 86 87 88 89 90
static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
{
	memset(osd_data, 0, sizeof (*osd_data));
	osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
}

91
static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
92 93 94 95 96 97 98 99 100 101 102
			struct page **pages, u64 length, u32 alignment,
			bool pages_from_pool, bool own_pages)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
	osd_data->pages = pages;
	osd_data->length = length;
	osd_data->alignment = alignment;
	osd_data->pages_from_pool = pages_from_pool;
	osd_data->own_pages = own_pages;
}

103
static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
104 105 106 107 108 109 110
			struct ceph_pagelist *pagelist)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
	osd_data->pagelist = pagelist;
}

#ifdef CONFIG_BLOCK
111
static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
112 113 114 115 116 117 118 119
			struct bio *bio, size_t bio_length)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
	osd_data->bio = bio;
	osd_data->bio_length = bio_length;
}
#endif /* CONFIG_BLOCK */

120 121 122 123 124 125
#define osd_req_op_data(oreq, whch, typ, fld)	\
	({						\
		BUG_ON(whch >= (oreq)->r_num_ops);	\
		&(oreq)->r_ops[whch].typ.fld;		\
	})

A
Alex Elder 已提交
126 127 128 129 130 131 132 133
static struct ceph_osd_data *
osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
{
	BUG_ON(which >= osd_req->r_num_ops);

	return &osd_req->r_ops[which].raw_data_in;
}

134 135
struct ceph_osd_data *
osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
136
			unsigned int which)
137
{
138
	return osd_req_op_data(osd_req, which, extent, osd_data);
139 140 141 142 143 144 145
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data);

struct ceph_osd_data *
osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
			unsigned int which)
{
146
	return osd_req_op_data(osd_req, which, cls, response_data);
147 148 149
}
EXPORT_SYMBOL(osd_req_op_cls_response_data);	/* ??? */

A
Alex Elder 已提交
150 151 152 153 154 155 156 157 158 159 160 161 162
void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
			unsigned int which, struct page **pages,
			u64 length, u32 alignment,
			bool pages_from_pool, bool own_pages)
{
	struct ceph_osd_data *osd_data;

	osd_data = osd_req_op_raw_data_in(osd_req, which);
	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);

163
void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
164 165
			unsigned int which, struct page **pages,
			u64 length, u32 alignment,
166 167 168 169
			bool pages_from_pool, bool own_pages)
{
	struct ceph_osd_data *osd_data;

170
	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
171 172 173 174 175 176
	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);

void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
177
			unsigned int which, struct ceph_pagelist *pagelist)
178 179 180
{
	struct ceph_osd_data *osd_data;

181
	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
182 183 184 185 186 187
	ceph_osd_data_pagelist_init(osd_data, pagelist);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);

#ifdef CONFIG_BLOCK
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)
189 190
{
	struct ceph_osd_data *osd_data;
191 192

	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
193 194 195 196 197 198 199 200 201 202 203
	ceph_osd_data_bio_init(osd_data, bio, bio_length);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
#endif /* CONFIG_BLOCK */

static void osd_req_op_cls_request_info_pagelist(
			struct ceph_osd_request *osd_req,
			unsigned int which, struct ceph_pagelist *pagelist)
{
	struct ceph_osd_data *osd_data;

204
	osd_data = osd_req_op_data(osd_req, which, cls, request_info);
205 206 207
	ceph_osd_data_pagelist_init(osd_data, pagelist);
}

208 209 210 211 212 213
void osd_req_op_cls_request_data_pagelist(
			struct ceph_osd_request *osd_req,
			unsigned int which, struct ceph_pagelist *pagelist)
{
	struct ceph_osd_data *osd_data;

214
	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
215 216 217 218
	ceph_osd_data_pagelist_init(osd_data, pagelist);
}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);

219 220 221 222 223 224 225 226 227 228 229 230
void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
			unsigned int which, struct page **pages, u64 length,
			u32 alignment, bool pages_from_pool, bool own_pages)
{
	struct ceph_osd_data *osd_data;

	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);

231 232 233 234 235 236
void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
			unsigned int which, struct page **pages, u64 length,
			u32 alignment, bool pages_from_pool, bool own_pages)
{
	struct ceph_osd_data *osd_data;

237
	osd_data = osd_req_op_data(osd_req, which, cls, response_data);
238 239 240 241 242
	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);

243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261
static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
{
	switch (osd_data->type) {
	case CEPH_OSD_DATA_TYPE_NONE:
		return 0;
	case CEPH_OSD_DATA_TYPE_PAGES:
		return osd_data->length;
	case CEPH_OSD_DATA_TYPE_PAGELIST:
		return (u64)osd_data->pagelist->length;
#ifdef CONFIG_BLOCK
	case CEPH_OSD_DATA_TYPE_BIO:
		return (u64)osd_data->bio_length;
#endif /* CONFIG_BLOCK */
	default:
		WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
		return 0;
	}
}

A
Alex Elder 已提交
262 263
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) {
A
Alex Elder 已提交
265 266 267 268 269 270
		int num_pages;

		num_pages = calc_pages_for((u64)osd_data->alignment,
						(u64)osd_data->length);
		ceph_release_page_vector(osd_data->pages, num_pages);
	}
271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288
	ceph_osd_data_init(osd_data);
}

static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
			unsigned int which)
{
	struct ceph_osd_req_op *op;

	BUG_ON(which >= osd_req->r_num_ops);
	op = &osd_req->r_ops[which];

	switch (op->op) {
	case CEPH_OSD_OP_READ:
	case CEPH_OSD_OP_WRITE:
		ceph_osd_data_release(&op->extent.osd_data);
		break;
	case CEPH_OSD_OP_CALL:
		ceph_osd_data_release(&op->cls.request_info);
289
		ceph_osd_data_release(&op->cls.request_data);
290 291 292 293 294
		ceph_osd_data_release(&op->cls.response_data);
		break;
	default:
		break;
	}
A
Alex Elder 已提交
295 296
}

S
Sage Weil 已提交
297 298 299
/*
 * requests
 */
S
Sage Weil 已提交
300
void ceph_osdc_release_request(struct kref *kref)
S
Sage Weil 已提交
301
{
A
Alex Elder 已提交
302
	struct ceph_osd_request *req;
303
	unsigned int which;
S
Sage Weil 已提交
304

A
Alex Elder 已提交
305
	req = container_of(kref, struct ceph_osd_request, r_kref);
S
Sage Weil 已提交
306 307
	if (req->r_request)
		ceph_msg_put(req->r_request);
308
	if (req->r_reply) {
309
		ceph_msg_revoke_incoming(req->r_reply);
310
		ceph_msg_put(req->r_reply);
311
	}
312

313 314
	for (which = 0; which < req->r_num_ops; which++)
		osd_req_op_data_release(req, which);
315

S
Sage Weil 已提交
316 317 318 319
	ceph_put_snap_context(req->r_snapc);
	if (req->r_mempool)
		mempool_free(req, req->r_osdc->req_mempool);
	else
320 321
		kmem_cache_free(ceph_osd_request_cache, req);

S
Sage Weil 已提交
322
}
323
EXPORT_SYMBOL(ceph_osdc_release_request);
324

325
struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
S
Sage Weil 已提交
326
					       struct ceph_snap_context *snapc,
327
					       unsigned int num_ops,
328
					       bool use_mempool,
329
					       gfp_t gfp_flags)
S
Sage Weil 已提交
330 331 332
{
	struct ceph_osd_request *req;
	struct ceph_msg *msg;
333 334
	size_t msg_size;

335 336 337
	BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
	BUG_ON(num_ops > CEPH_OSD_MAX_OP);

338 339 340 341 342 343 344 345 346
	msg_size = 4 + 4 + 8 + 8 + 4+8;
	msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
	msg_size += 1 + 8 + 4 + 4;     /* pg_t */
	msg_size += 4 + MAX_OBJ_NAME_SIZE;
	msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
	msg_size += 8;  /* snapid */
	msg_size += 8;  /* snap_seq */
	msg_size += 8 * (snapc ? snapc->num_snaps : 0);  /* snaps */
	msg_size += 4;
S
Sage Weil 已提交
347 348

	if (use_mempool) {
349
		req = mempool_alloc(osdc->req_mempool, gfp_flags);
S
Sage Weil 已提交
350 351
		memset(req, 0, sizeof(*req));
	} else {
352
		req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags);
S
Sage Weil 已提交
353 354
	}
	if (req == NULL)
355
		return NULL;
S
Sage Weil 已提交
356 357 358

	req->r_osdc = osdc;
	req->r_mempool = use_mempool;
359
	req->r_num_ops = num_ops;
360

S
Sage Weil 已提交
361
	kref_init(&req->r_kref);
S
Sage Weil 已提交
362 363
	init_completion(&req->r_completion);
	init_completion(&req->r_safe_completion);
364
	RB_CLEAR_NODE(&req->r_node);
S
Sage Weil 已提交
365
	INIT_LIST_HEAD(&req->r_unsafe_item);
366 367
	INIT_LIST_HEAD(&req->r_linger_item);
	INIT_LIST_HEAD(&req->r_linger_osd);
368
	INIT_LIST_HEAD(&req->r_req_lru_item);
369 370
	INIT_LIST_HEAD(&req->r_osd_item);

S
Sage Weil 已提交
371 372 373 374 375
	/* create reply message */
	if (use_mempool)
		msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
	else
		msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
376
				   OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
377
	if (!msg) {
S
Sage Weil 已提交
378
		ceph_osdc_put_request(req);
379
		return NULL;
S
Sage Weil 已提交
380 381 382 383
	}
	req->r_reply = msg;

	/* create request message; allow space for oid */
S
Sage Weil 已提交
384
	if (use_mempool)
385
		msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
S
Sage Weil 已提交
386
	else
387
		msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
388
	if (!msg) {
S
Sage Weil 已提交
389
		ceph_osdc_put_request(req);
390
		return NULL;
S
Sage Weil 已提交
391
	}
392

S
Sage Weil 已提交
393
	memset(msg->front.iov_base, 0, msg->front.iov_len);
394 395 396 397 398

	req->r_request = msg;

	return req;
}
399
EXPORT_SYMBOL(ceph_osdc_alloc_request);
400

401
static bool osd_req_opcode_valid(u16 opcode)
402
{
403
	switch (opcode) {
404
	case CEPH_OSD_OP_READ:
405
	case CEPH_OSD_OP_STAT:
406 407 408
	case CEPH_OSD_OP_MAPEXT:
	case CEPH_OSD_OP_MASKTRUNC:
	case CEPH_OSD_OP_SPARSE_READ:
409
	case CEPH_OSD_OP_NOTIFY:
410
	case CEPH_OSD_OP_NOTIFY_ACK:
411
	case CEPH_OSD_OP_ASSERT_VER:
412
	case CEPH_OSD_OP_WRITE:
413 414 415 416 417
	case CEPH_OSD_OP_WRITEFULL:
	case CEPH_OSD_OP_TRUNCATE:
	case CEPH_OSD_OP_ZERO:
	case CEPH_OSD_OP_DELETE:
	case CEPH_OSD_OP_APPEND:
418
	case CEPH_OSD_OP_STARTSYNC:
419 420 421 422 423 424
	case CEPH_OSD_OP_SETTRUNC:
	case CEPH_OSD_OP_TRIMTRUNC:
	case CEPH_OSD_OP_TMAPUP:
	case CEPH_OSD_OP_TMAPPUT:
	case CEPH_OSD_OP_TMAPGET:
	case CEPH_OSD_OP_CREATE:
425
	case CEPH_OSD_OP_ROLLBACK:
426
	case CEPH_OSD_OP_WATCH:
427 428 429 430 431 432 433 434 435 436 437 438
	case CEPH_OSD_OP_OMAPGETKEYS:
	case CEPH_OSD_OP_OMAPGETVALS:
	case CEPH_OSD_OP_OMAPGETHEADER:
	case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
	case CEPH_OSD_OP_OMAPSETVALS:
	case CEPH_OSD_OP_OMAPSETHEADER:
	case CEPH_OSD_OP_OMAPCLEAR:
	case CEPH_OSD_OP_OMAPRMKEYS:
	case CEPH_OSD_OP_OMAP_CMP:
	case CEPH_OSD_OP_CLONERANGE:
	case CEPH_OSD_OP_ASSERT_SRC_VERSION:
	case CEPH_OSD_OP_SRC_CMPXATTR:
439
	case CEPH_OSD_OP_GETXATTR:
440
	case CEPH_OSD_OP_GETXATTRS:
441 442
	case CEPH_OSD_OP_CMPXATTR:
	case CEPH_OSD_OP_SETXATTR:
443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460
	case CEPH_OSD_OP_SETXATTRS:
	case CEPH_OSD_OP_RESETXATTRS:
	case CEPH_OSD_OP_RMXATTR:
	case CEPH_OSD_OP_PULL:
	case CEPH_OSD_OP_PUSH:
	case CEPH_OSD_OP_BALANCEREADS:
	case CEPH_OSD_OP_UNBALANCEREADS:
	case CEPH_OSD_OP_SCRUB:
	case CEPH_OSD_OP_SCRUB_RESERVE:
	case CEPH_OSD_OP_SCRUB_UNRESERVE:
	case CEPH_OSD_OP_SCRUB_STOP:
	case CEPH_OSD_OP_SCRUB_MAP:
	case CEPH_OSD_OP_WRLOCK:
	case CEPH_OSD_OP_WRUNLOCK:
	case CEPH_OSD_OP_RDLOCK:
	case CEPH_OSD_OP_RDUNLOCK:
	case CEPH_OSD_OP_UPLOCK:
	case CEPH_OSD_OP_DNLOCK:
461
	case CEPH_OSD_OP_CALL:
462 463
	case CEPH_OSD_OP_PGLS:
	case CEPH_OSD_OP_PGLS_FILTER:
464 465 466 467 468 469
		return true;
	default:
		return false;
	}
}

470 471 472 473 474
/*
 * This is an osd op init function for opcodes that have no data or
 * other information associated with them.  It also serves as a
 * common init routine for all the other init functions, below.
 */
475
static struct ceph_osd_req_op *
A
Alex Elder 已提交
476
_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
477
				u16 opcode)
478
{
479 480 481
	struct ceph_osd_req_op *op;

	BUG_ON(which >= osd_req->r_num_ops);
482 483
	BUG_ON(!osd_req_opcode_valid(opcode));

484
	op = &osd_req->r_ops[which];
485 486
	memset(op, 0, sizeof (*op));
	op->op = opcode;
487 488

	return op;
489 490
}

A
Alex Elder 已提交
491 492 493 494 495 496 497
void osd_req_op_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode)
{
	(void)_osd_req_op_init(osd_req, which, opcode);
}
EXPORT_SYMBOL(osd_req_op_init);

498 499
void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
500 501 502
				u64 offset, u64 length,
				u64 truncate_size, u32 truncate_seq)
{
A
Alex Elder 已提交
503
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
504 505 506 507 508 509 510 511 512 513 514 515 516 517 518
	size_t payload_len = 0;

	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);

	op->extent.offset = offset;
	op->extent.length = length;
	op->extent.truncate_size = truncate_size;
	op->extent.truncate_seq = truncate_seq;
	if (opcode == CEPH_OSD_OP_WRITE)
		payload_len += length;

	op->payload_len = payload_len;
}
EXPORT_SYMBOL(osd_req_op_extent_init);

519 520
void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
				unsigned int which, u64 length)
521
{
522 523 524 525 526 527
	struct ceph_osd_req_op *op;
	u64 previous;

	BUG_ON(which >= osd_req->r_num_ops);
	op = &osd_req->r_ops[which];
	previous = op->extent.length;
528 529 530 531 532 533 534 535 536 537

	if (length == previous)
		return;		/* Nothing to do */
	BUG_ON(length > previous);

	op->extent.length = length;
	op->payload_len -= previous - length;
}
EXPORT_SYMBOL(osd_req_op_extent_update);

538
void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
539
			u16 opcode, const char *class, const char *method)
540
{
A
Alex Elder 已提交
541
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
542
	struct ceph_pagelist *pagelist;
543 544 545 546 547
	size_t payload_len = 0;
	size_t size;

	BUG_ON(opcode != CEPH_OSD_OP_CALL);

548 549 550 551
	pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
	BUG_ON(!pagelist);
	ceph_pagelist_init(pagelist);

552 553 554 555
	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
556
	ceph_pagelist_append(pagelist, class, size);
557 558 559 560 561 562
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
563
	ceph_pagelist_append(pagelist, method, size);
564 565
	payload_len += size;

566
	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
567

568 569 570 571 572
	op->cls.argc = 0;	/* currently unused */

	op->payload_len = payload_len;
}
EXPORT_SYMBOL(osd_req_op_cls_init);
573

574 575
void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
576 577
				u64 cookie, u64 version, int flag)
{
A
Alex Elder 已提交
578
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
579

580
	BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
581 582

	op->watch.cookie = cookie;
A
Alex Elder 已提交
583
	op->watch.ver = version;
584
	if (opcode == CEPH_OSD_OP_WATCH && flag)
585
		op->watch.flag = (u8)1;
586 587 588
}
EXPORT_SYMBOL(osd_req_op_watch_init);

589
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
590 591 592 593 594 595 596
				struct ceph_osd_data *osd_data)
{
	u64 length = ceph_osd_data_length(osd_data);

	if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
		BUG_ON(length > (u64) SIZE_MAX);
		if (length)
597
			ceph_msg_data_add_pages(msg, osd_data->pages,
598 599 600
					length, osd_data->alignment);
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
		BUG_ON(!length);
601
		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
602 603
#ifdef CONFIG_BLOCK
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
604
		ceph_msg_data_add_bio(msg, osd_data->bio, length);
605 606 607 608 609 610
#endif
	} else {
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
	}
}

611
static u64 osd_req_encode_op(struct ceph_osd_request *req,
612
			      struct ceph_osd_op *dst, unsigned int which)
613
{
614
	struct ceph_osd_req_op *src;
615
	struct ceph_osd_data *osd_data;
616
	u64 request_data_len = 0;
617
	u64 data_length;
618

619 620
	BUG_ON(which >= req->r_num_ops);
	src = &req->r_ops[which];
621 622 623 624 625 626 627 628
	if (WARN_ON(!osd_req_opcode_valid(src->op))) {
		pr_err("unrecognized osd opcode %d\n", src->op);

		return 0;
	}

	switch (src->op) {
	case CEPH_OSD_OP_STAT:
A
Alex Elder 已提交
629 630
		osd_data = &src->raw_data_in;
		ceph_osdc_msg_data_add(req->r_reply, osd_data);
631 632 633 634
		break;
	case CEPH_OSD_OP_READ:
	case CEPH_OSD_OP_WRITE:
		if (src->op == CEPH_OSD_OP_WRITE)
635
			request_data_len = src->extent.length;
636 637 638 639 640 641
		dst->extent.offset = cpu_to_le64(src->extent.offset);
		dst->extent.length = cpu_to_le64(src->extent.length);
		dst->extent.truncate_size =
			cpu_to_le64(src->extent.truncate_size);
		dst->extent.truncate_seq =
			cpu_to_le32(src->extent.truncate_seq);
642
		osd_data = &src->extent.osd_data;
643
		if (src->op == CEPH_OSD_OP_WRITE)
644
			ceph_osdc_msg_data_add(req->r_request, osd_data);
645
		else
646
			ceph_osdc_msg_data_add(req->r_reply, osd_data);
647 648 649 650
		break;
	case CEPH_OSD_OP_CALL:
		dst->cls.class_len = src->cls.class_len;
		dst->cls.method_len = src->cls.method_len;
651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666
		osd_data = &src->cls.request_info;
		ceph_osdc_msg_data_add(req->r_request, osd_data);
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
		request_data_len = osd_data->pagelist->length;

		osd_data = &src->cls.request_data;
		data_length = ceph_osd_data_length(osd_data);
		if (data_length) {
			BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
			dst->cls.indata_len = cpu_to_le32(data_length);
			ceph_osdc_msg_data_add(req->r_request, osd_data);
			src->payload_len += data_length;
			request_data_len += data_length;
		}
		osd_data = &src->cls.response_data;
		ceph_osdc_msg_data_add(req->r_reply, osd_data);
667 668 669 670 671 672 673 674 675 676
		break;
	case CEPH_OSD_OP_STARTSYNC:
		break;
	case CEPH_OSD_OP_NOTIFY_ACK:
	case CEPH_OSD_OP_WATCH:
		dst->watch.cookie = cpu_to_le64(src->watch.cookie);
		dst->watch.ver = cpu_to_le64(src->watch.ver);
		dst->watch.flag = src->watch.flag;
		break;
	default:
677
		pr_err("unsupported osd opcode %s\n",
678
			ceph_osd_op_name(src->op));
679
		WARN_ON(1);
680 681

		return 0;
682
	}
683
	dst->op = cpu_to_le16(src->op);
684
	dst->payload_len = cpu_to_le32(src->payload_len);
685

686
	return request_data_len;
687 688
}

689 690 691 692 693 694 695 696 697 698 699 700 701 702
/*
 * build new request AND message, calculate layout, and adjust file
 * extent as needed.
 *
 * if the file was recently truncated, we include information about its
 * old and new size so that the object can be updated appropriately.  (we
 * avoid synchronously deleting truncated objects because it's slow.)
 *
 * if @do_sync, include a 'startsync' command so that the osd will flush
 * data quickly.
 */
struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
					       struct ceph_file_layout *layout,
					       struct ceph_vino vino,
703
					       u64 off, u64 *plen, int num_ops,
704 705 706 707
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
708
					       bool use_mempool)
709
{
710
	struct ceph_osd_request *req;
711 712 713
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
714 715
	u32 object_size;
	u64 object_base;
716
	int r;
717

718
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
719

720
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
A
Alex Elder 已提交
721
					GFP_NOFS);
722
	if (!req)
723
		return ERR_PTR(-ENOMEM);
724

725
	req->r_flags = flags;
726 727

	/* calculate max write size */
728
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
729 730
	if (r < 0) {
		ceph_osdc_put_request(req);
731
		return ERR_PTR(r);
732
	}
733

734 735
	object_size = le32_to_cpu(layout->fl_object_size);
	object_base = off - objoff;
736 737 738 739 740 741 742 743
	if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
		if (truncate_size <= object_base) {
			truncate_size = 0;
		} else {
			truncate_size -= object_base;
			if (truncate_size > object_size)
				truncate_size = object_size;
		}
744
	}
745

746
	osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
747
				truncate_size, truncate_seq);
748

749 750 751 752 753 754
	/*
	 * A second op in the ops array means the caller wants to
	 * also issue a include a 'startsync' command so that the
	 * osd will flush data quickly.
	 */
	if (num_ops > 1)
755
		osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
756

757 758
	req->r_file_layout = *layout;  /* keep a copy */

759 760
	snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
		vino.ino, objnum);
761 762
	req->r_oid_len = strlen(req->r_oid);

S
Sage Weil 已提交
763 764
	return req;
}
765
EXPORT_SYMBOL(ceph_osdc_new_request);
S
Sage Weil 已提交
766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831

/*
 * We keep osd requests in an rbtree, sorted by ->r_tid.
 */
static void __insert_request(struct ceph_osd_client *osdc,
			     struct ceph_osd_request *new)
{
	struct rb_node **p = &osdc->requests.rb_node;
	struct rb_node *parent = NULL;
	struct ceph_osd_request *req = NULL;

	while (*p) {
		parent = *p;
		req = rb_entry(parent, struct ceph_osd_request, r_node);
		if (new->r_tid < req->r_tid)
			p = &(*p)->rb_left;
		else if (new->r_tid > req->r_tid)
			p = &(*p)->rb_right;
		else
			BUG();
	}

	rb_link_node(&new->r_node, parent, p);
	rb_insert_color(&new->r_node, &osdc->requests);
}

static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
						 u64 tid)
{
	struct ceph_osd_request *req;
	struct rb_node *n = osdc->requests.rb_node;

	while (n) {
		req = rb_entry(n, struct ceph_osd_request, r_node);
		if (tid < req->r_tid)
			n = n->rb_left;
		else if (tid > req->r_tid)
			n = n->rb_right;
		else
			return req;
	}
	return NULL;
}

static struct ceph_osd_request *
__lookup_request_ge(struct ceph_osd_client *osdc,
		    u64 tid)
{
	struct ceph_osd_request *req;
	struct rb_node *n = osdc->requests.rb_node;

	while (n) {
		req = rb_entry(n, struct ceph_osd_request, r_node);
		if (tid < req->r_tid) {
			if (!n->rb_left)
				return req;
			n = n->rb_left;
		} else if (tid > req->r_tid) {
			n = n->rb_right;
		} else {
			return req;
		}
	}
	return NULL;
}

832 833 834 835 836 837
/*
 * Resubmit requests pending on the given osd.
 */
static void __kick_osd_requests(struct ceph_osd_client *osdc,
				struct ceph_osd *osd)
{
838
	struct ceph_osd_request *req, *nreq;
839
	LIST_HEAD(resend);
840 841 842 843
	int err;

	dout("__kick_osd_requests osd%d\n", osd->o_osd);
	err = __reset_osd(osdc, osd);
844
	if (err)
845
		return;
846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862
	/*
	 * Build up a list of requests to resend by traversing the
	 * osd's list of requests.  Requests for a given object are
	 * sent in tid order, and that is also the order they're
	 * kept on this list.  Therefore all requests that are in
	 * flight will be found first, followed by all requests that
	 * have not yet been sent.  And to resend requests while
	 * preserving this order we will want to put any sent
	 * requests back on the front of the osd client's unsent
	 * list.
	 *
	 * So we build a separate ordered list of already-sent
	 * requests for the affected osd and splice it onto the
	 * front of the osd client's unsent list.  Once we've seen a
	 * request that has not yet been sent we're done.  Those
	 * requests are already sitting right where they belong.
	 */
863
	list_for_each_entry(req, &osd->o_requests, r_osd_item) {
864 865 866 867
		if (!req->r_sent)
			break;
		list_move_tail(&req->r_req_lru_item, &resend);
		dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
868
		     osd->o_osd);
869 870 871
		if (!req->r_linger)
			req->r_flags |= CEPH_OSD_FLAG_RETRY;
	}
872
	list_splice(&resend, &osdc->req_unsent);
873

874 875 876 877 878
	/*
	 * Linger requests are re-registered before sending, which
	 * sets up a new tid for each.  We add them to the unsent
	 * list at the end to keep things in tid order.
	 */
879 880
	list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
				 r_linger_osd) {
881 882 883 884 885
		/*
		 * reregister request prior to unregistering linger so
		 * that r_osd is preserved.
		 */
		BUG_ON(!list_empty(&req->r_req_lru_item));
886
		__register_request(osdc, req);
887
		list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
888
		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
889
		__unregister_linger_request(osdc, req);
890 891
		dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
		     osd->o_osd);
892 893 894
	}
}

S
Sage Weil 已提交
895
/*
896
 * If the osd connection drops, we need to resubmit all requests.
S
Sage Weil 已提交
897 898 899 900 901 902 903 904 905 906 907
 */
static void osd_reset(struct ceph_connection *con)
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc;

	if (!osd)
		return;
	dout("osd_reset osd%d\n", osd->o_osd);
	osdc = osd->o_osdc;
	down_read(&osdc->map_sem);
S
Sage Weil 已提交
908 909
	mutex_lock(&osdc->request_mutex);
	__kick_osd_requests(osdc, osd);
A
Alex Elder 已提交
910
	__send_queued(osdc);
S
Sage Weil 已提交
911
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
912 913 914 915 916 917
	up_read(&osdc->map_sem);
}

/*
 * Track open sessions with osds.
 */
918
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
S
Sage Weil 已提交
919 920 921 922 923 924 925 926 927
{
	struct ceph_osd *osd;

	osd = kzalloc(sizeof(*osd), GFP_NOFS);
	if (!osd)
		return NULL;

	atomic_set(&osd->o_ref, 1);
	osd->o_osdc = osdc;
928
	osd->o_osd = onum;
929
	RB_CLEAR_NODE(&osd->o_node);
S
Sage Weil 已提交
930
	INIT_LIST_HEAD(&osd->o_requests);
931
	INIT_LIST_HEAD(&osd->o_linger_requests);
932
	INIT_LIST_HEAD(&osd->o_osd_lru);
S
Sage Weil 已提交
933 934
	osd->o_incarnation = 1;

935
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
936

937
	INIT_LIST_HEAD(&osd->o_keepalive_item);
S
Sage Weil 已提交
938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956
	return osd;
}

static struct ceph_osd *get_osd(struct ceph_osd *osd)
{
	if (atomic_inc_not_zero(&osd->o_ref)) {
		dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
		     atomic_read(&osd->o_ref));
		return osd;
	} else {
		dout("get_osd %p FAIL\n", osd);
		return NULL;
	}
}

static void put_osd(struct ceph_osd *osd)
{
	dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
	     atomic_read(&osd->o_ref) - 1);
957
	if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
S
Sage Weil 已提交
958 959
		struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;

960
		ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
S
Sage Weil 已提交
961
		kfree(osd);
S
Sage Weil 已提交
962
	}
S
Sage Weil 已提交
963 964 965 966 967
}

/*
 * remove an osd from our map
 */
968
static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
Sage Weil 已提交
969
{
970
	dout("__remove_osd %p\n", osd);
S
Sage Weil 已提交
971 972
	BUG_ON(!list_empty(&osd->o_requests));
	rb_erase(&osd->o_node, &osdc->osds);
973
	list_del_init(&osd->o_osd_lru);
S
Sage Weil 已提交
974 975 976 977
	ceph_con_close(&osd->o_con);
	put_osd(osd);
}

978 979
static void remove_all_osds(struct ceph_osd_client *osdc)
{
980
	dout("%s %p\n", __func__, osdc);
981 982 983 984 985 986 987 988 989
	mutex_lock(&osdc->request_mutex);
	while (!RB_EMPTY_ROOT(&osdc->osds)) {
		struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
						struct ceph_osd, o_node);
		__remove_osd(osdc, osd);
	}
	mutex_unlock(&osdc->request_mutex);
}

990 991 992 993 994 995
static void __move_osd_to_lru(struct ceph_osd_client *osdc,
			      struct ceph_osd *osd)
{
	dout("__move_osd_to_lru %p\n", osd);
	BUG_ON(!list_empty(&osd->o_osd_lru));
	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
996
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
997 998 999 1000 1001 1002 1003 1004 1005
}

static void __remove_osd_from_lru(struct ceph_osd *osd)
{
	dout("__remove_osd_from_lru %p\n", osd);
	if (!list_empty(&osd->o_osd_lru))
		list_del_init(&osd->o_osd_lru);
}

1006
static void remove_old_osds(struct ceph_osd_client *osdc)
1007 1008 1009 1010 1011 1012
{
	struct ceph_osd *osd, *nosd;

	dout("__remove_old_osds %p\n", osdc);
	mutex_lock(&osdc->request_mutex);
	list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1013
		if (time_before(jiffies, osd->lru_ttl))
1014 1015 1016 1017 1018 1019
			break;
		__remove_osd(osdc, osd);
	}
	mutex_unlock(&osdc->request_mutex);
}

S
Sage Weil 已提交
1020 1021 1022
/*
 * reset osd connect
 */
1023
static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
Sage Weil 已提交
1024
{
A
Alex Elder 已提交
1025
	struct ceph_entity_addr *peer_addr;
S
Sage Weil 已提交
1026

1027
	dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1028 1029
	if (list_empty(&osd->o_requests) &&
	    list_empty(&osd->o_linger_requests)) {
1030
		__remove_osd(osdc, osd);
A
Alex Elder 已提交
1031 1032 1033 1034 1035 1036 1037 1038 1039

		return -ENODEV;
	}

	peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
	if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
			!ceph_con_opened(&osd->o_con)) {
		struct ceph_osd_request *req;

1040 1041 1042 1043 1044
		dout(" osd addr hasn't changed and connection never opened,"
		     " letting msgr retry");
		/* touch each r_stamp for handle_timeout()'s benfit */
		list_for_each_entry(req, &osd->o_requests, r_osd_item)
			req->r_stamp = jiffies;
A
Alex Elder 已提交
1045 1046

		return -EAGAIN;
S
Sage Weil 已提交
1047
	}
A
Alex Elder 已提交
1048 1049 1050 1051 1052 1053

	ceph_con_close(&osd->o_con);
	ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
	osd->o_incarnation++;

	return 0;
S
Sage Weil 已提交
1054 1055 1056 1057 1058 1059 1060 1061
}

static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
{
	struct rb_node **p = &osdc->osds.rb_node;
	struct rb_node *parent = NULL;
	struct ceph_osd *osd = NULL;

1062
	dout("__insert_osd %p osd%d\n", new, new->o_osd);
S
Sage Weil 已提交
1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094
	while (*p) {
		parent = *p;
		osd = rb_entry(parent, struct ceph_osd, o_node);
		if (new->o_osd < osd->o_osd)
			p = &(*p)->rb_left;
		else if (new->o_osd > osd->o_osd)
			p = &(*p)->rb_right;
		else
			BUG();
	}

	rb_link_node(&new->o_node, parent, p);
	rb_insert_color(&new->o_node, &osdc->osds);
}

static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
{
	struct ceph_osd *osd;
	struct rb_node *n = osdc->osds.rb_node;

	while (n) {
		osd = rb_entry(n, struct ceph_osd, o_node);
		if (o < osd->o_osd)
			n = n->rb_left;
		else if (o > osd->o_osd)
			n = n->rb_right;
		else
			return osd;
	}
	return NULL;
}

1095 1096 1097
static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
{
	schedule_delayed_work(&osdc->timeout_work,
1098
			osdc->client->options->osd_keepalive_timeout * HZ);
1099 1100 1101 1102 1103 1104
}

static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
{
	cancel_delayed_work(&osdc->timeout_work);
}
S
Sage Weil 已提交
1105 1106 1107 1108 1109

/*
 * Register request, assign tid.  If this is the first request, set up
 * the timeout event.
 */
1110 1111
static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req)
S
Sage Weil 已提交
1112 1113
{
	req->r_tid = ++osdc->last_tid;
1114
	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1115
	dout("__register_request %p tid %lld\n", req, req->r_tid);
S
Sage Weil 已提交
1116 1117 1118 1119
	__insert_request(osdc, req);
	ceph_osdc_get_request(req);
	osdc->num_requests++;
	if (osdc->num_requests == 1) {
1120 1121
		dout(" first request, scheduling timeout\n");
		__schedule_osd_timeout(osdc);
S
Sage Weil 已提交
1122
	}
1123 1124
}

S
Sage Weil 已提交
1125 1126 1127 1128 1129 1130
/*
 * called under osdc->request_mutex
 */
static void __unregister_request(struct ceph_osd_client *osdc,
				 struct ceph_osd_request *req)
{
1131 1132 1133 1134 1135 1136
	if (RB_EMPTY_NODE(&req->r_node)) {
		dout("__unregister_request %p tid %lld not registered\n",
			req, req->r_tid);
		return;
	}

S
Sage Weil 已提交
1137 1138 1139 1140
	dout("__unregister_request %p tid %lld\n", req, req->r_tid);
	rb_erase(&req->r_node, &osdc->requests);
	osdc->num_requests--;

1141 1142
	if (req->r_osd) {
		/* make sure the original request isn't in flight. */
1143
		ceph_msg_revoke(req->r_request);
1144 1145

		list_del_init(&req->r_osd_item);
1146 1147 1148
		if (list_empty(&req->r_osd->o_requests) &&
		    list_empty(&req->r_osd->o_linger_requests)) {
			dout("moving osd to %p lru\n", req->r_osd);
1149
			__move_osd_to_lru(osdc, req->r_osd);
1150
		}
1151
		if (list_empty(&req->r_linger_item))
1152
			req->r_osd = NULL;
1153
	}
S
Sage Weil 已提交
1154

A
Alex Elder 已提交
1155
	list_del_init(&req->r_req_lru_item);
S
Sage Weil 已提交
1156 1157
	ceph_osdc_put_request(req);

1158 1159 1160
	if (osdc->num_requests == 0) {
		dout(" no requests, canceling timeout\n");
		__cancel_osd_timeout(osdc);
S
Sage Weil 已提交
1161 1162 1163 1164 1165 1166 1167 1168
	}
}

/*
 * Cancel a previously queued request message
 */
static void __cancel_request(struct ceph_osd_request *req)
{
1169
	if (req->r_sent && req->r_osd) {
1170
		ceph_msg_revoke(req->r_request);
S
Sage Weil 已提交
1171 1172 1173 1174
		req->r_sent = 0;
	}
}

1175 1176 1177 1178
static void __register_linger_request(struct ceph_osd_client *osdc,
				    struct ceph_osd_request *req)
{
	dout("__register_linger_request %p\n", req);
1179
	ceph_osdc_get_request(req);
1180
	list_add_tail(&req->r_linger_item, &osdc->req_linger);
1181 1182 1183
	if (req->r_osd)
		list_add_tail(&req->r_linger_osd,
			      &req->r_osd->o_linger_requests);
1184 1185 1186 1187 1188 1189
}

static void __unregister_linger_request(struct ceph_osd_client *osdc,
					struct ceph_osd_request *req)
{
	dout("__unregister_linger_request %p\n", req);
A
Alex Elder 已提交
1190
	list_del_init(&req->r_linger_item);
1191 1192 1193 1194 1195 1196 1197 1198
	if (req->r_osd) {
		list_del_init(&req->r_linger_osd);

		if (list_empty(&req->r_osd->o_requests) &&
		    list_empty(&req->r_osd->o_linger_requests)) {
			dout("moving osd to %p lru\n", req->r_osd);
			__move_osd_to_lru(osdc, req->r_osd);
		}
1199 1200
		if (list_empty(&req->r_osd_item))
			req->r_osd = NULL;
1201
	}
1202
	ceph_osdc_put_request(req);
1203 1204 1205 1206 1207 1208 1209
}

void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
					 struct ceph_osd_request *req)
{
	mutex_lock(&osdc->request_mutex);
	if (req->r_linger) {
1210
		req->r_linger = 0;
1211
		__unregister_linger_request(osdc, req);
1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226
	}
	mutex_unlock(&osdc->request_mutex);
}
EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);

void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
				  struct ceph_osd_request *req)
{
	if (!req->r_linger) {
		dout("set_request_linger %p\n", req);
		req->r_linger = 1;
	}
}
EXPORT_SYMBOL(ceph_osdc_set_request_linger);

S
Sage Weil 已提交
1227 1228 1229
/*
 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
 * (as needed), and set the request r_osd appropriately.  If there is
L
Lucas De Marchi 已提交
1230
 * no up osd, set r_osd to NULL.  Move the request to the appropriate list
1231
 * (unsent, homeless) or leave on in-flight lru.
S
Sage Weil 已提交
1232 1233 1234 1235 1236
 *
 * Return 0 if unchanged, 1 if changed, or negative on error.
 *
 * Caller should hold map_sem for read and request_mutex.
 */
1237
static int __map_request(struct ceph_osd_client *osdc,
1238
			 struct ceph_osd_request *req, int force_resend)
S
Sage Weil 已提交
1239
{
1240
	struct ceph_pg pgid;
1241 1242
	int acting[CEPH_PG_MAX_SIZE];
	int o = -1, num = 0;
S
Sage Weil 已提交
1243 1244
	int err;

1245
	dout("map_request %p tid %lld\n", req, req->r_tid);
1246 1247
	err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
				ceph_file_layout_pg_pool(req->r_file_layout));
1248 1249
	if (err) {
		list_move(&req->r_req_lru_item, &osdc->req_notarget);
S
Sage Weil 已提交
1250
		return err;
1251
	}
1252 1253
	req->r_pgid = pgid;

1254 1255 1256 1257 1258
	err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
	if (err > 0) {
		o = acting[0];
		num = err;
	}
S
Sage Weil 已提交
1259

1260 1261
	if ((!force_resend &&
	     req->r_osd && req->r_osd->o_osd == o &&
1262 1263 1264
	     req->r_sent >= req->r_osd->o_incarnation &&
	     req->r_num_pg_osds == num &&
	     memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
S
Sage Weil 已提交
1265 1266 1267
	    (req->r_osd == NULL && o == -1))
		return 0;  /* no change */

1268 1269
	dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
	     req->r_tid, pgid.pool, pgid.seed, o,
S
Sage Weil 已提交
1270 1271
	     req->r_osd ? req->r_osd->o_osd : -1);

1272 1273 1274 1275
	/* record full pg acting set */
	memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
	req->r_num_pg_osds = num;

S
Sage Weil 已提交
1276 1277 1278 1279 1280 1281 1282 1283
	if (req->r_osd) {
		__cancel_request(req);
		list_del_init(&req->r_osd_item);
		req->r_osd = NULL;
	}

	req->r_osd = __lookup_osd(osdc, o);
	if (!req->r_osd && o >= 0) {
1284
		err = -ENOMEM;
1285
		req->r_osd = create_osd(osdc, o);
1286 1287
		if (!req->r_osd) {
			list_move(&req->r_req_lru_item, &osdc->req_notarget);
1288
			goto out;
1289
		}
S
Sage Weil 已提交
1290

1291
		dout("map_request osd %p is osd%d\n", req->r_osd, o);
S
Sage Weil 已提交
1292 1293
		__insert_osd(osdc, req->r_osd);

1294 1295 1296
		ceph_con_open(&req->r_osd->o_con,
			      CEPH_ENTITY_TYPE_OSD, o,
			      &osdc->osdmap->osd_addr[o]);
S
Sage Weil 已提交
1297 1298
	}

1299 1300
	if (req->r_osd) {
		__remove_osd_from_lru(req->r_osd);
1301 1302
		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
		list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1303
	} else {
1304
		list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1305
	}
1306
	err = 1;   /* osd or pg changed */
S
Sage Weil 已提交
1307 1308 1309 1310 1311 1312 1313 1314

out:
	return err;
}

/*
 * caller should hold map_sem (for read) and request_mutex
 */
1315 1316
static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
S
Sage Weil 已提交
1317
{
1318
	void *p;
S
Sage Weil 已提交
1319

1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333
	dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
	     req, req->r_tid, req->r_osd->o_osd, req->r_flags,
	     (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);

	/* fill in message content that changes each time we send it */
	put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
	put_unaligned_le32(req->r_flags, req->r_request_flags);
	put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
	p = req->r_request_pgid;
	ceph_encode_64(&p, req->r_pgid.pool);
	ceph_encode_32(&p, req->r_pgid.seed);
	put_unaligned_le64(1, req->r_request_attempts);  /* FIXME */
	memcpy(req->r_request_reassert_version, &req->r_reassert_version,
	       sizeof(req->r_reassert_version));
1334

S
Sage Weil 已提交
1335
	req->r_stamp = jiffies;
1336
	list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
S
Sage Weil 已提交
1337 1338

	ceph_msg_get(req->r_request); /* send consumes a ref */
1339

S
Sage Weil 已提交
1340
	req->r_sent = req->r_osd->o_incarnation;
1341 1342

	ceph_con_send(&req->r_osd->o_con, req->r_request);
S
Sage Weil 已提交
1343 1344
}

1345 1346 1347
/*
 * Send any requests in the queue (req_unsent).
 */
A
Alex Elder 已提交
1348
static void __send_queued(struct ceph_osd_client *osdc)
1349 1350 1351
{
	struct ceph_osd_request *req, *tmp;

A
Alex Elder 已提交
1352 1353
	dout("__send_queued\n");
	list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1354 1355 1356
		__send_request(osdc, req);
}

S
Sage Weil 已提交
1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369
/*
 * Timeout callback, called every N seconds when 1 or more osd
 * requests has been active for more than N seconds.  When this
 * happens, we ping all OSDs with requests who have timed out to
 * ensure any communications channel reset is detected.  Reset the
 * request timeouts another N seconds in the future as we go.
 * Reschedule the timeout event another N seconds in future (unless
 * there are no open requests).
 */
static void handle_timeout(struct work_struct *work)
{
	struct ceph_osd_client *osdc =
		container_of(work, struct ceph_osd_client, timeout_work.work);
S
Sage Weil 已提交
1370
	struct ceph_osd_request *req;
S
Sage Weil 已提交
1371
	struct ceph_osd *osd;
1372
	unsigned long keepalive =
1373
		osdc->client->options->osd_keepalive_timeout * HZ;
1374
	struct list_head slow_osds;
S
Sage Weil 已提交
1375 1376 1377 1378 1379 1380 1381
	dout("timeout\n");
	down_read(&osdc->map_sem);

	ceph_monc_request_next_osdmap(&osdc->client->monc);

	mutex_lock(&osdc->request_mutex);

1382 1383 1384 1385 1386 1387 1388
	/*
	 * ping osds that are a bit slow.  this ensures that if there
	 * is a break in the TCP connection we will notice, and reopen
	 * a connection with that osd (from the fault callback).
	 */
	INIT_LIST_HEAD(&slow_osds);
	list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
S
Sage Weil 已提交
1389
		if (time_before(jiffies, req->r_stamp + keepalive))
1390 1391 1392 1393 1394
			break;

		osd = req->r_osd;
		BUG_ON(!osd);
		dout(" tid %llu is slow, will send keepalive on osd%d\n",
S
Sage Weil 已提交
1395
		     req->r_tid, osd->o_osd);
1396 1397 1398 1399 1400 1401
		list_move_tail(&osd->o_keepalive_item, &slow_osds);
	}
	while (!list_empty(&slow_osds)) {
		osd = list_entry(slow_osds.next, struct ceph_osd,
				 o_keepalive_item);
		list_del_init(&osd->o_keepalive_item);
S
Sage Weil 已提交
1402 1403 1404
		ceph_con_keepalive(&osd->o_con);
	}

1405
	__schedule_osd_timeout(osdc);
A
Alex Elder 已提交
1406
	__send_queued(osdc);
S
Sage Weil 已提交
1407 1408 1409 1410
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
}

1411 1412 1413 1414 1415 1416
static void handle_osds_timeout(struct work_struct *work)
{
	struct ceph_osd_client *osdc =
		container_of(work, struct ceph_osd_client,
			     osds_timeout_work.work);
	unsigned long delay =
1417
		osdc->client->options->osd_idle_ttl * HZ >> 2;
1418 1419 1420

	dout("osds timeout\n");
	down_read(&osdc->map_sem);
1421
	remove_old_osds(osdc);
1422 1423 1424 1425 1426 1427
	up_read(&osdc->map_sem);

	schedule_delayed_work(&osdc->osds_timeout_work,
			      round_jiffies_relative(delay));
}

S
Sage Weil 已提交
1428 1429 1430 1431 1432
static void complete_request(struct ceph_osd_request *req)
{
	complete_all(&req->r_safe_completion);  /* fsync waiter */
}

S
Sage Weil 已提交
1433 1434 1435 1436
/*
 * handle osd op reply.  either call the callback if it is specified,
 * or do the completion to wake up the waiting thread.
 */
1437 1438
static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
			 struct ceph_connection *con)
S
Sage Weil 已提交
1439
{
1440
	void *p, *end;
S
Sage Weil 已提交
1441 1442
	struct ceph_osd_request *req;
	u64 tid;
1443
	int object_len;
1444 1445
	unsigned int numops;
	int payload_len, flags;
1446
	s32 result;
1447 1448 1449 1450 1451 1452
	s32 retry_attempt;
	struct ceph_pg pg;
	int err;
	u32 reassert_epoch;
	u64 reassert_version;
	u32 osdmap_epoch;
1453
	int already_completed;
1454
	u32 bytes;
1455
	unsigned int i;
S
Sage Weil 已提交
1456

1457
	tid = le64_to_cpu(msg->hdr.tid);
1458 1459 1460 1461 1462 1463 1464 1465 1466 1467
	dout("handle_reply %p tid %llu\n", msg, tid);

	p = msg->front.iov_base;
	end = p + msg->front.iov_len;

	ceph_decode_need(&p, end, 4, bad);
	object_len = ceph_decode_32(&p);
	ceph_decode_need(&p, end, object_len, bad);
	p += object_len;

1468
	err = ceph_decode_pgid(&p, end, &pg);
1469
	if (err)
S
Sage Weil 已提交
1470
		goto bad;
1471 1472 1473 1474 1475 1476 1477 1478

	ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
	flags = ceph_decode_64(&p);
	result = ceph_decode_32(&p);
	reassert_epoch = ceph_decode_32(&p);
	reassert_version = ceph_decode_64(&p);
	osdmap_epoch = ceph_decode_32(&p);

S
Sage Weil 已提交
1479 1480 1481 1482 1483
	/* lookup */
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (req == NULL) {
		dout("handle_reply tid %llu dne\n", tid);
1484
		goto bad_mutex;
S
Sage Weil 已提交
1485 1486
	}
	ceph_osdc_get_request(req);
1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508

	dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
	     req, result);

	ceph_decode_need(&p, end, 4, bad);
	numops = ceph_decode_32(&p);
	if (numops > CEPH_OSD_MAX_OP)
		goto bad_put;
	if (numops != req->r_num_ops)
		goto bad_put;
	payload_len = 0;
	ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad);
	for (i = 0; i < numops; i++) {
		struct ceph_osd_op *op = p;
		int len;

		len = le32_to_cpu(op->payload_len);
		req->r_reply_op_len[i] = len;
		dout(" op %d has %d bytes\n", i, len);
		payload_len += len;
		p += sizeof(*op);
	}
1509 1510
	bytes = le32_to_cpu(msg->hdr.data_len);
	if (payload_len != bytes) {
1511
		pr_warning("sum of op payload lens %d != data_len %d",
1512
			   payload_len, bytes);
1513 1514 1515 1516 1517 1518 1519
		goto bad_put;
	}

	ceph_decode_need(&p, end, 4 + numops * 4, bad);
	retry_attempt = ceph_decode_32(&p);
	for (i = 0; i < numops; i++)
		req->r_reply_op_result[i] = ceph_decode_32(&p);
S
Sage Weil 已提交
1520

Y
Yan, Zheng 已提交
1521 1522
	already_completed = req->r_got_reply;

S
Sage Weil 已提交
1523 1524
	if (!req->r_got_reply) {

1525
		req->r_result = result;
S
Sage Weil 已提交
1526 1527 1528 1529 1530 1531
		dout("handle_reply result %d bytes %d\n", req->r_result,
		     bytes);
		if (req->r_result == 0)
			req->r_result = bytes;

		/* in case this is a write and we need to replay, */
1532 1533
		req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
		req->r_reassert_version.version = cpu_to_le64(reassert_version);
S
Sage Weil 已提交
1534 1535 1536 1537

		req->r_got_reply = 1;
	} else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
		dout("handle_reply tid %llu dup ack\n", tid);
S
Sage Weil 已提交
1538
		mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1539 1540 1541 1542 1543
		goto done;
	}

	dout("handle_reply tid %llu flags %d\n", tid, flags);

1544 1545 1546
	if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
		__register_linger_request(osdc, req);

S
Sage Weil 已提交
1547
	/* either this is a read, or we got the safe response */
1548 1549
	if (result < 0 ||
	    (flags & CEPH_OSD_FLAG_ONDISK) ||
S
Sage Weil 已提交
1550 1551 1552 1553 1554
	    ((flags & CEPH_OSD_FLAG_WRITE) == 0))
		__unregister_request(osdc, req);

	mutex_unlock(&osdc->request_mutex);

Y
Yan, Zheng 已提交
1555
	if (!already_completed) {
1556 1557 1558
		if (req->r_unsafe_callback &&
		    result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
			req->r_unsafe_callback(req, true);
Y
Yan, Zheng 已提交
1559 1560 1561 1562 1563
		if (req->r_callback)
			req->r_callback(req, msg);
		else
			complete_all(&req->r_completion);
	}
S
Sage Weil 已提交
1564

1565 1566 1567
	if (flags & CEPH_OSD_FLAG_ONDISK) {
		if (req->r_unsafe_callback && already_completed)
			req->r_unsafe_callback(req, false);
S
Sage Weil 已提交
1568
		complete_request(req);
1569
	}
S
Sage Weil 已提交
1570 1571

done:
1572
	dout("req=%p req->r_linger=%d\n", req, req->r_linger);
S
Sage Weil 已提交
1573 1574 1575
	ceph_osdc_put_request(req);
	return;

1576 1577
bad_put:
	ceph_osdc_put_request(req);
1578 1579
bad_mutex:
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1580
bad:
1581 1582
	pr_err("corrupt osd_op_reply got %d %d\n",
	       (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1583
	ceph_msg_dump(msg);
S
Sage Weil 已提交
1584 1585
}

1586
static void reset_changed_osds(struct ceph_osd_client *osdc)
S
Sage Weil 已提交
1587 1588 1589
{
	struct rb_node *p, *n;

1590 1591
	for (p = rb_first(&osdc->osds); p; p = n) {
		struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
S
Sage Weil 已提交
1592

1593 1594 1595 1596 1597 1598 1599
		n = rb_next(p);
		if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
		    memcmp(&osd->o_con.peer_addr,
			   ceph_osd_addr(osdc->osdmap,
					 osd->o_osd),
			   sizeof(struct ceph_entity_addr)) != 0)
			__reset_osd(osdc, osd);
S
Sage Weil 已提交
1600
	}
1601 1602 1603
}

/*
1604 1605
 * Requeue requests whose mapping to an OSD has changed.  If requests map to
 * no osd, request a new map.
1606
 *
1607
 * Caller should hold map_sem for read.
1608
 */
1609
static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
1610
{
1611
	struct ceph_osd_request *req, *nreq;
1612 1613 1614
	struct rb_node *p;
	int needmap = 0;
	int err;
1615

1616
	dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
1617
	mutex_lock(&osdc->request_mutex);
1618
	for (p = rb_first(&osdc->requests); p; ) {
1619
		req = rb_entry(p, struct ceph_osd_request, r_node);
1620
		p = rb_next(p);
1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633

		/*
		 * For linger requests that have not yet been
		 * registered, move them to the linger list; they'll
		 * be sent to the osd in the loop below.  Unregister
		 * the request before re-registering it as a linger
		 * request to ensure the __map_request() below
		 * will decide it needs to be sent.
		 */
		if (req->r_linger && list_empty(&req->r_linger_item)) {
			dout("%p tid %llu restart on osd%d\n",
			     req, req->r_tid,
			     req->r_osd ? req->r_osd->o_osd : -1);
1634
			ceph_osdc_get_request(req);
1635 1636
			__unregister_request(osdc, req);
			__register_linger_request(osdc, req);
1637
			ceph_osdc_put_request(req);
1638 1639 1640
			continue;
		}

1641
		err = __map_request(osdc, req, force_resend);
1642 1643 1644 1645 1646 1647
		if (err < 0)
			continue;  /* error */
		if (req->r_osd == NULL) {
			dout("%p tid %llu maps to no osd\n", req, req->r_tid);
			needmap++;  /* request a newer map */
		} else if (err > 0) {
1648 1649 1650 1651
			if (!req->r_linger) {
				dout("%p tid %llu requeued on osd%d\n", req,
				     req->r_tid,
				     req->r_osd ? req->r_osd->o_osd : -1);
1652
				req->r_flags |= CEPH_OSD_FLAG_RETRY;
1653 1654
			}
		}
1655 1656 1657 1658 1659 1660
	}

	list_for_each_entry_safe(req, nreq, &osdc->req_linger,
				 r_linger_item) {
		dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);

1661
		err = __map_request(osdc, req, force_resend);
1662
		dout("__map_request returned %d\n", err);
1663 1664 1665 1666 1667 1668 1669 1670
		if (err == 0)
			continue;  /* no change and no osd was specified */
		if (err < 0)
			continue;  /* hrm! */
		if (req->r_osd == NULL) {
			dout("tid %llu maps to no valid osd\n", req->r_tid);
			needmap++;  /* request a newer map */
			continue;
1671
		}
1672 1673 1674 1675

		dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
		     req->r_osd ? req->r_osd->o_osd : -1);
		__register_request(osdc, req);
1676
		__unregister_linger_request(osdc, req);
1677
	}
1678
	reset_changed_osds(osdc);
S
Sage Weil 已提交
1679 1680 1681 1682 1683 1684
	mutex_unlock(&osdc->request_mutex);

	if (needmap) {
		dout("%d requests for down osds, need new map\n", needmap);
		ceph_monc_request_next_osdmap(&osdc->client->monc);
	}
1685
}
1686 1687


S
Sage Weil 已提交
1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710
/*
 * Process updated osd map.
 *
 * The message contains any number of incremental and full maps, normally
 * indicating some sort of topology change in the cluster.  Kick requests
 * off to different OSDs as needed.
 */
void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
{
	void *p, *end, *next;
	u32 nr_maps, maplen;
	u32 epoch;
	struct ceph_osdmap *newmap = NULL, *oldmap;
	int err;
	struct ceph_fsid fsid;

	dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
	p = msg->front.iov_base;
	end = p + msg->front.iov_len;

	/* verify fsid */
	ceph_decode_need(&p, end, sizeof(fsid), bad);
	ceph_decode_copy(&p, &fsid, sizeof(fsid));
1711 1712
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
		return;
S
Sage Weil 已提交
1713 1714 1715 1716 1717 1718 1719 1720

	down_write(&osdc->map_sem);

	/* incremental maps */
	ceph_decode_32_safe(&p, end, nr_maps, bad);
	dout(" %d inc maps\n", nr_maps);
	while (nr_maps > 0) {
		ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1721 1722
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
1723 1724 1725 1726 1727 1728 1729
		ceph_decode_need(&p, end, maplen, bad);
		next = p + maplen;
		if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
			dout("applying incremental map %u len %d\n",
			     epoch, maplen);
			newmap = osdmap_apply_incremental(&p, next,
							  osdc->osdmap,
1730
							  &osdc->client->msgr);
S
Sage Weil 已提交
1731 1732 1733 1734
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
1735
			BUG_ON(!newmap);
S
Sage Weil 已提交
1736 1737 1738 1739
			if (newmap != osdc->osdmap) {
				ceph_osdmap_destroy(osdc->osdmap);
				osdc->osdmap = newmap;
			}
1740
			kick_requests(osdc, 0);
S
Sage Weil 已提交
1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755
		} else {
			dout("ignoring incremental map %u len %d\n",
			     epoch, maplen);
		}
		p = next;
		nr_maps--;
	}
	if (newmap)
		goto done;

	/* full maps */
	ceph_decode_32_safe(&p, end, nr_maps, bad);
	dout(" %d full maps\n", nr_maps);
	while (nr_maps) {
		ceph_decode_need(&p, end, 2*sizeof(u32), bad);
1756 1757
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
1758 1759 1760 1761 1762 1763 1764 1765 1766
		ceph_decode_need(&p, end, maplen, bad);
		if (nr_maps > 1) {
			dout("skipping non-latest full map %u len %d\n",
			     epoch, maplen);
		} else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
			dout("skipping full map %u len %d, "
			     "older than our %u\n", epoch, maplen,
			     osdc->osdmap->epoch);
		} else {
1767 1768
			int skipped_map = 0;

S
Sage Weil 已提交
1769 1770 1771 1772 1773 1774
			dout("taking full map %u len %d\n", epoch, maplen);
			newmap = osdmap_decode(&p, p+maplen);
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
1775
			BUG_ON(!newmap);
S
Sage Weil 已提交
1776 1777
			oldmap = osdc->osdmap;
			osdc->osdmap = newmap;
1778 1779 1780
			if (oldmap) {
				if (oldmap->epoch + 1 < newmap->epoch)
					skipped_map = 1;
S
Sage Weil 已提交
1781
				ceph_osdmap_destroy(oldmap);
1782 1783
			}
			kick_requests(osdc, skipped_map);
S
Sage Weil 已提交
1784 1785 1786 1787 1788 1789 1790 1791
		}
		p += maplen;
		nr_maps--;
	}

done:
	downgrade_write(&osdc->map_sem);
	ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1792 1793 1794 1795 1796 1797 1798 1799 1800

	/*
	 * subscribe to subsequent osdmap updates if full to ensure
	 * we find out when we are no longer full and stop returning
	 * ENOSPC.
	 */
	if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
		ceph_monc_request_next_osdmap(&osdc->client->monc);

A
Alex Elder 已提交
1801 1802 1803
	mutex_lock(&osdc->request_mutex);
	__send_queued(osdc);
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1804
	up_read(&osdc->map_sem);
1805
	wake_up_all(&osdc->client->auth_wq);
S
Sage Weil 已提交
1806 1807 1808 1809
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
1810
	ceph_msg_dump(msg);
S
Sage Weil 已提交
1811 1812 1813 1814
	up_write(&osdc->map_sem);
	return;
}

1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896
/*
 * watch/notify callback event infrastructure
 *
 * These callbacks are used both for watch and notify operations.
 */
static void __release_event(struct kref *kref)
{
	struct ceph_osd_event *event =
		container_of(kref, struct ceph_osd_event, kref);

	dout("__release_event %p\n", event);
	kfree(event);
}

static void get_event(struct ceph_osd_event *event)
{
	kref_get(&event->kref);
}

void ceph_osdc_put_event(struct ceph_osd_event *event)
{
	kref_put(&event->kref, __release_event);
}
EXPORT_SYMBOL(ceph_osdc_put_event);

static void __insert_event(struct ceph_osd_client *osdc,
			     struct ceph_osd_event *new)
{
	struct rb_node **p = &osdc->event_tree.rb_node;
	struct rb_node *parent = NULL;
	struct ceph_osd_event *event = NULL;

	while (*p) {
		parent = *p;
		event = rb_entry(parent, struct ceph_osd_event, node);
		if (new->cookie < event->cookie)
			p = &(*p)->rb_left;
		else if (new->cookie > event->cookie)
			p = &(*p)->rb_right;
		else
			BUG();
	}

	rb_link_node(&new->node, parent, p);
	rb_insert_color(&new->node, &osdc->event_tree);
}

static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
					        u64 cookie)
{
	struct rb_node **p = &osdc->event_tree.rb_node;
	struct rb_node *parent = NULL;
	struct ceph_osd_event *event = NULL;

	while (*p) {
		parent = *p;
		event = rb_entry(parent, struct ceph_osd_event, node);
		if (cookie < event->cookie)
			p = &(*p)->rb_left;
		else if (cookie > event->cookie)
			p = &(*p)->rb_right;
		else
			return event;
	}
	return NULL;
}

static void __remove_event(struct ceph_osd_event *event)
{
	struct ceph_osd_client *osdc = event->osdc;

	if (!RB_EMPTY_NODE(&event->node)) {
		dout("__remove_event removed %p\n", event);
		rb_erase(&event->node, &osdc->event_tree);
		ceph_osdc_put_event(event);
	} else {
		dout("__remove_event didn't remove %p\n", event);
	}
}

int ceph_osdc_create_event(struct ceph_osd_client *osdc,
			   void (*event_cb)(u64, u64, u8, void *),
1897
			   void *data, struct ceph_osd_event **pevent)
1898 1899 1900 1901 1902 1903 1904 1905 1906
{
	struct ceph_osd_event *event;

	event = kmalloc(sizeof(*event), GFP_NOIO);
	if (!event)
		return -ENOMEM;

	dout("create_event %p\n", event);
	event->cb = event_cb;
1907
	event->one_shot = 0;
1908 1909 1910
	event->data = data;
	event->osdc = osdc;
	INIT_LIST_HEAD(&event->osd_node);
1911
	RB_CLEAR_NODE(&event->node);
1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957
	kref_init(&event->kref);   /* one ref for us */
	kref_get(&event->kref);    /* one ref for the caller */

	spin_lock(&osdc->event_lock);
	event->cookie = ++osdc->event_count;
	__insert_event(osdc, event);
	spin_unlock(&osdc->event_lock);

	*pevent = event;
	return 0;
}
EXPORT_SYMBOL(ceph_osdc_create_event);

void ceph_osdc_cancel_event(struct ceph_osd_event *event)
{
	struct ceph_osd_client *osdc = event->osdc;

	dout("cancel_event %p\n", event);
	spin_lock(&osdc->event_lock);
	__remove_event(event);
	spin_unlock(&osdc->event_lock);
	ceph_osdc_put_event(event); /* caller's */
}
EXPORT_SYMBOL(ceph_osdc_cancel_event);


static void do_event_work(struct work_struct *work)
{
	struct ceph_osd_event_work *event_work =
		container_of(work, struct ceph_osd_event_work, work);
	struct ceph_osd_event *event = event_work->event;
	u64 ver = event_work->ver;
	u64 notify_id = event_work->notify_id;
	u8 opcode = event_work->opcode;

	dout("do_event_work completing %p\n", event);
	event->cb(ver, notify_id, opcode, event->data);
	dout("do_event_work completed %p\n", event);
	ceph_osdc_put_event(event);
	kfree(event_work);
}


/*
 * Process osd watch notifications
 */
1958 1959
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
{
	void *p, *end;
	u8 proto_ver;
	u64 cookie, ver, notify_id;
	u8 opcode;
	struct ceph_osd_event *event;
	struct ceph_osd_event_work *event_work;

	p = msg->front.iov_base;
	end = p + msg->front.iov_len;

	ceph_decode_8_safe(&p, end, proto_ver, bad);
	ceph_decode_8_safe(&p, end, opcode, bad);
	ceph_decode_64_safe(&p, end, cookie, bad);
	ceph_decode_64_safe(&p, end, ver, bad);
	ceph_decode_64_safe(&p, end, notify_id, bad);

	spin_lock(&osdc->event_lock);
	event = __find_event(osdc, cookie);
	if (event) {
1980
		BUG_ON(event->one_shot);
1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991
		get_event(event);
	}
	spin_unlock(&osdc->event_lock);
	dout("handle_watch_notify cookie %lld ver %lld event %p\n",
	     cookie, ver, event);
	if (event) {
		event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
		if (!event_work) {
			dout("ERROR: could not allocate event_work\n");
			goto done_err;
		}
1992
		INIT_WORK(&event_work->work, do_event_work);
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
		event_work->event = event;
		event_work->ver = ver;
		event_work->notify_id = notify_id;
		event_work->opcode = opcode;
		if (!queue_work(osdc->notify_wq, &event_work->work)) {
			dout("WARNING: failed to queue notify event work\n");
			goto done_err;
		}
	}

	return;

done_err:
	ceph_osdc_put_event(event);
	return;

bad:
	pr_err("osdc handle_watch_notify corrupt msg\n");
	return;
}

2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111
/*
 * build new request AND message
 *
 */
void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
				struct ceph_snap_context *snapc, u64 snap_id,
				struct timespec *mtime)
{
	struct ceph_msg *msg = req->r_request;
	void *p;
	size_t msg_size;
	int flags = req->r_flags;
	u64 data_len;
	unsigned int i;

	req->r_snapid = snap_id;
	req->r_snapc = ceph_get_snap_context(snapc);

	/* encode request */
	msg->hdr.version = cpu_to_le16(4);

	p = msg->front.iov_base;
	ceph_encode_32(&p, 1);   /* client_inc  is always 1 */
	req->r_request_osdmap_epoch = p;
	p += 4;
	req->r_request_flags = p;
	p += 4;
	if (req->r_flags & CEPH_OSD_FLAG_WRITE)
		ceph_encode_timespec(p, mtime);
	p += sizeof(struct ceph_timespec);
	req->r_request_reassert_version = p;
	p += sizeof(struct ceph_eversion); /* will get filled in */

	/* oloc */
	ceph_encode_8(&p, 4);
	ceph_encode_8(&p, 4);
	ceph_encode_32(&p, 8 + 4 + 4);
	req->r_request_pool = p;
	p += 8;
	ceph_encode_32(&p, -1);  /* preferred */
	ceph_encode_32(&p, 0);   /* key len */

	ceph_encode_8(&p, 1);
	req->r_request_pgid = p;
	p += 8 + 4;
	ceph_encode_32(&p, -1);  /* preferred */

	/* oid */
	ceph_encode_32(&p, req->r_oid_len);
	memcpy(p, req->r_oid, req->r_oid_len);
	dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
	p += req->r_oid_len;

	/* ops--can imply data */
	ceph_encode_16(&p, (u16)req->r_num_ops);
	data_len = 0;
	for (i = 0; i < req->r_num_ops; i++) {
		data_len += osd_req_encode_op(req, p, i);
		p += sizeof(struct ceph_osd_op);
	}

	/* snaps */
	ceph_encode_64(&p, req->r_snapid);
	ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
	ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
	if (req->r_snapc) {
		for (i = 0; i < snapc->num_snaps; i++) {
			ceph_encode_64(&p, req->r_snapc->snaps[i]);
		}
	}

	req->r_request_attempts = p;
	p += 4;

	/* data */
	if (flags & CEPH_OSD_FLAG_WRITE) {
		u16 data_off;

		/*
		 * The header "data_off" is a hint to the receiver
		 * allowing it to align received data into its
		 * buffers such that there's no need to re-copy
		 * it before writing it to disk (direct I/O).
		 */
		data_off = (u16) (off & 0xffff);
		req->r_request->hdr.data_off = cpu_to_le16(data_off);
	}
	req->r_request->hdr.data_len = cpu_to_le32(data_len);

	BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
	msg_size = p - msg->front.iov_base;
	msg->front.iov_len = msg_size;
	msg->hdr.front_len = cpu_to_le32(msg_size);

	dout("build_request msg_size was %d\n", (int)msg_size);
}
EXPORT_SYMBOL(ceph_osdc_build_request);

2112 2113 2114 2115 2116 2117 2118 2119 2120
/*
 * Register request, send initial attempt.
 */
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
			    struct ceph_osd_request *req,
			    bool nofail)
{
	int rc = 0;

S
Sage Weil 已提交
2121 2122
	down_read(&osdc->map_sem);
	mutex_lock(&osdc->request_mutex);
2123
	__register_request(osdc, req);
2124 2125
	req->r_sent = 0;
	req->r_got_reply = 0;
2126 2127 2128 2129 2130 2131
	rc = __map_request(osdc, req, 0);
	if (rc < 0) {
		if (nofail) {
			dout("osdc_start_request failed map, "
				" will retry %lld\n", req->r_tid);
			rc = 0;
2132 2133
		} else {
			__unregister_request(osdc, req);
S
Sage Weil 已提交
2134
		}
2135
		goto out_unlock;
S
Sage Weil 已提交
2136
	}
2137 2138 2139 2140
	if (req->r_osd == NULL) {
		dout("send_request %p no up osds in pg\n", req);
		ceph_monc_request_next_osdmap(&osdc->client->monc);
	} else {
2141
		__send_queued(osdc);
2142 2143
	}
	rc = 0;
2144
out_unlock:
S
Sage Weil 已提交
2145 2146 2147 2148
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
	return rc;
}
2149
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162

/*
 * wait for a request to complete
 */
int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
{
	int rc;

	rc = wait_for_completion_interruptible(&req->r_completion);
	if (rc < 0) {
		mutex_lock(&osdc->request_mutex);
		__cancel_request(req);
2163
		__unregister_request(osdc, req);
S
Sage Weil 已提交
2164
		mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
2165
		complete_request(req);
2166
		dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
S
Sage Weil 已提交
2167 2168 2169 2170 2171 2172
		return rc;
	}

	dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
	return req->r_result;
}
2173
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206

/*
 * sync - wait for all in-flight requests to flush.  avoid starvation.
 */
void ceph_osdc_sync(struct ceph_osd_client *osdc)
{
	struct ceph_osd_request *req;
	u64 last_tid, next_tid = 0;

	mutex_lock(&osdc->request_mutex);
	last_tid = osdc->last_tid;
	while (1) {
		req = __lookup_request_ge(osdc, next_tid);
		if (!req)
			break;
		if (req->r_tid > last_tid)
			break;

		next_tid = req->r_tid + 1;
		if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
			continue;

		ceph_osdc_get_request(req);
		mutex_unlock(&osdc->request_mutex);
		dout("sync waiting on tid %llu (last is %llu)\n",
		     req->r_tid, last_tid);
		wait_for_completion(&req->r_safe_completion);
		mutex_lock(&osdc->request_mutex);
		ceph_osdc_put_request(req);
	}
	mutex_unlock(&osdc->request_mutex);
	dout("sync done (thru tid %llu)\n", last_tid);
}
2207
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224

/*
 * init, shutdown
 */
int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
{
	int err;

	dout("init\n");
	osdc->client = client;
	osdc->osdmap = NULL;
	init_rwsem(&osdc->map_sem);
	init_completion(&osdc->map_waiters);
	osdc->last_requested_map = 0;
	mutex_init(&osdc->request_mutex);
	osdc->last_tid = 0;
	osdc->osds = RB_ROOT;
2225
	INIT_LIST_HEAD(&osdc->osd_lru);
S
Sage Weil 已提交
2226
	osdc->requests = RB_ROOT;
2227
	INIT_LIST_HEAD(&osdc->req_lru);
2228 2229
	INIT_LIST_HEAD(&osdc->req_unsent);
	INIT_LIST_HEAD(&osdc->req_notarget);
2230
	INIT_LIST_HEAD(&osdc->req_linger);
S
Sage Weil 已提交
2231 2232
	osdc->num_requests = 0;
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2233
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2234 2235 2236
	spin_lock_init(&osdc->event_lock);
	osdc->event_tree = RB_ROOT;
	osdc->event_count = 0;
2237 2238

	schedule_delayed_work(&osdc->osds_timeout_work,
2239
	   round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
S
Sage Weil 已提交
2240

2241
	err = -ENOMEM;
S
Sage Weil 已提交
2242 2243 2244
	osdc->req_mempool = mempool_create_kmalloc_pool(10,
					sizeof(struct ceph_osd_request));
	if (!osdc->req_mempool)
2245
		goto out;
S
Sage Weil 已提交
2246

2247 2248
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
				OSD_OP_FRONT_LEN, 10, true,
2249
				"osd_op");
S
Sage Weil 已提交
2250
	if (err < 0)
2251
		goto out_mempool;
2252
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2253 2254
				OSD_OPREPLY_FRONT_LEN, 10, true,
				"osd_op_reply");
S
Sage Weil 已提交
2255 2256
	if (err < 0)
		goto out_msgpool;
2257 2258 2259 2260 2261 2262 2263

	osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
	if (IS_ERR(osdc->notify_wq)) {
		err = PTR_ERR(osdc->notify_wq);
		osdc->notify_wq = NULL;
		goto out_msgpool;
	}
S
Sage Weil 已提交
2264
	return 0;
2265

S
Sage Weil 已提交
2266 2267
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
2268 2269 2270 2271
out_mempool:
	mempool_destroy(osdc->req_mempool);
out:
	return err;
S
Sage Weil 已提交
2272 2273 2274 2275
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
2276 2277
	flush_workqueue(osdc->notify_wq);
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
2278
	cancel_delayed_work_sync(&osdc->timeout_work);
2279
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
S
Sage Weil 已提交
2280 2281 2282 2283
	if (osdc->osdmap) {
		ceph_osdmap_destroy(osdc->osdmap);
		osdc->osdmap = NULL;
	}
2284
	remove_all_osds(osdc);
S
Sage Weil 已提交
2285 2286
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
2287
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2288 2289 2290 2291 2292 2293 2294 2295 2296 2297
}

/*
 * Read some contiguous pages.  If we cross a stripe boundary, shorten
 * *plen.  Return number of bytes read, or error.
 */
int ceph_osdc_readpages(struct ceph_osd_client *osdc,
			struct ceph_vino vino, struct ceph_file_layout *layout,
			u64 off, u64 *plen,
			u32 truncate_seq, u64 truncate_size,
2298
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
2299 2300 2301 2302 2303 2304
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
2305
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
S
Sage Weil 已提交
2306
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2307
				    NULL, truncate_seq, truncate_size,
2308
				    false);
2309 2310
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2311 2312

	/* it may be a short read due to an object boundary */
2313

2314
	osd_req_op_extent_osd_data_pages(req, 0,
2315
				pages, *plen, page_align, false, false);
S
Sage Weil 已提交
2316

2317
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
2318
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
2319

2320
	ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2321

S
Sage Weil 已提交
2322 2323 2324 2325 2326 2327 2328 2329
	rc = ceph_osdc_start_request(osdc, req, false);
	if (!rc)
		rc = ceph_osdc_wait_request(osdc, req);

	ceph_osdc_put_request(req);
	dout("readpages result %d\n", rc);
	return rc;
}
2330
EXPORT_SYMBOL(ceph_osdc_readpages);
S
Sage Weil 已提交
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340

/*
 * do a synchronous write on N pages
 */
int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
			 struct ceph_file_layout *layout,
			 struct ceph_snap_context *snapc,
			 u64 off, u64 len,
			 u32 truncate_seq, u64 truncate_size,
			 struct timespec *mtime,
2341
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
2342 2343 2344
{
	struct ceph_osd_request *req;
	int rc = 0;
2345
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
2346

2347
	BUG_ON(vino.snap != CEPH_NOSNAP);	/* snapshots aren't writeable */
2348
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
S
Sage Weil 已提交
2349
				    CEPH_OSD_OP_WRITE,
2350
				    CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2351
				    snapc, truncate_seq, truncate_size,
2352
				    true);
2353 2354
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2355 2356

	/* it may be a short write due to an object boundary */
2357
	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2358 2359
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
2360

2361
	ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2362

2363
	rc = ceph_osdc_start_request(osdc, req, true);
S
Sage Weil 已提交
2364 2365 2366 2367 2368 2369 2370 2371 2372
	if (!rc)
		rc = ceph_osdc_wait_request(osdc, req);

	ceph_osdc_put_request(req);
	if (rc == 0)
		rc = len;
	dout("writepages result %d\n", rc);
	return rc;
}
2373
EXPORT_SYMBOL(ceph_osdc_writepages);
S
Sage Weil 已提交
2374

2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394
int ceph_osdc_setup(void)
{
	BUG_ON(ceph_osd_request_cache);
	ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
					sizeof (struct ceph_osd_request),
					__alignof__(struct ceph_osd_request),
					0, NULL);

	return ceph_osd_request_cache ? 0 : -ENOMEM;
}
EXPORT_SYMBOL(ceph_osdc_setup);

void ceph_osdc_cleanup(void)
{
	BUG_ON(!ceph_osd_request_cache);
	kmem_cache_destroy(ceph_osd_request_cache);
	ceph_osd_request_cache = NULL;
}
EXPORT_SYMBOL(ceph_osdc_cleanup);

S
Sage Weil 已提交
2395 2396 2397 2398 2399 2400
/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
2401
	struct ceph_osd_client *osdc;
S
Sage Weil 已提交
2402 2403 2404
	int type = le16_to_cpu(msg->hdr.type);

	if (!osd)
S
Sage Weil 已提交
2405
		goto out;
2406
	osdc = osd->o_osdc;
S
Sage Weil 已提交
2407 2408 2409 2410 2411 2412

	switch (type) {
	case CEPH_MSG_OSD_MAP:
		ceph_osdc_handle_map(osdc, msg);
		break;
	case CEPH_MSG_OSD_OPREPLY:
2413
		handle_reply(osdc, msg, con);
S
Sage Weil 已提交
2414
		break;
2415 2416 2417
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
Sage Weil 已提交
2418 2419 2420 2421 2422

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
S
Sage Weil 已提交
2423
out:
S
Sage Weil 已提交
2424 2425 2426
	ceph_msg_put(msg);
}

2427
/*
2428 2429
 * lookup and return message for incoming reply.  set up reply message
 * pages.
2430 2431
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
2432 2433
				  struct ceph_msg_header *hdr,
				  int *skip)
S
Sage Weil 已提交
2434 2435 2436
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
2437
	struct ceph_msg *m;
2438
	struct ceph_osd_request *req;
2439 2440
	int front = le32_to_cpu(hdr->front_len);
	int data_len = le32_to_cpu(hdr->data_len);
2441
	u64 tid;
S
Sage Weil 已提交
2442

2443 2444 2445 2446 2447 2448
	tid = le64_to_cpu(hdr->tid);
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (!req) {
		*skip = 1;
		m = NULL;
2449 2450
		dout("get_reply unknown tid %llu from osd%d\n", tid,
		     osd->o_osd);
2451 2452
		goto out;
	}
S
Sage Weil 已提交
2453

2454
	if (req->r_reply->con)
2455
		dout("%s revoking msg %p from old con %p\n", __func__,
2456 2457
		     req->r_reply, req->r_reply->con);
	ceph_msg_revoke_incoming(req->r_reply);
2458

S
Sage Weil 已提交
2459
	if (front > req->r_reply->front.iov_len) {
2460 2461 2462 2463
		pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
			   front, (int)req->r_reply->front.iov_len,
			   (unsigned int)con->peer_name.type,
			   le64_to_cpu(con->peer_name.num));
2464
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
2465
		if (!m)
S
Sage Weil 已提交
2466 2467 2468 2469 2470 2471
			goto out;
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
	m = ceph_msg_get(req->r_reply);

2472
	if (data_len > 0) {
2473
		struct ceph_osd_data *osd_data;
2474

2475 2476 2477 2478 2479
		/*
		 * XXX This is assuming there is only one op containing
		 * XXX page data.  Probably OK for reads, but this
		 * XXX ought to be done more generally.
		 */
2480
		osd_data = osd_req_op_extent_osd_data(req, 0);
2481 2482
		if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
			if (osd_data->pages &&
2483
				unlikely(osd_data->length < data_len)) {
2484

2485 2486 2487
				pr_warning("tid %lld reply has %d bytes "
					"we had only %llu bytes ready\n",
					tid, data_len, osd_data->length);
2488 2489 2490 2491 2492 2493
				*skip = 1;
				ceph_msg_put(m);
				m = NULL;
				goto out;
			}
		}
2494
	}
2495
	*skip = 0;
S
Sage Weil 已提交
2496
	dout("get_reply tid %lld %p\n", tid, m);
2497 2498 2499

out:
	mutex_unlock(&osdc->request_mutex);
2500
	return m;
2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511

}

static struct ceph_msg *alloc_msg(struct ceph_connection *con,
				  struct ceph_msg_header *hdr,
				  int *skip)
{
	struct ceph_osd *osd = con->private;
	int type = le16_to_cpu(hdr->type);
	int front = le32_to_cpu(hdr->front_len);

A
Alex Elder 已提交
2512
	*skip = 0;
2513 2514
	switch (type) {
	case CEPH_MSG_OSD_MAP:
2515
	case CEPH_MSG_WATCH_NOTIFY:
2516
		return ceph_msg_new(type, front, GFP_NOFS, false);
2517 2518 2519 2520 2521 2522 2523 2524
	case CEPH_MSG_OSD_OPREPLY:
		return get_reply(con, hdr, skip);
	default:
		pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
			osd->o_osd);
		*skip = 1;
		return NULL;
	}
S
Sage Weil 已提交
2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543
}

/*
 * Wrappers to refcount containing ceph_osd struct
 */
static struct ceph_connection *get_osd_con(struct ceph_connection *con)
{
	struct ceph_osd *osd = con->private;
	if (get_osd(osd))
		return con;
	return NULL;
}

static void put_osd_con(struct ceph_connection *con)
{
	struct ceph_osd *osd = con->private;
	put_osd(osd);
}

2544 2545 2546
/*
 * authentication
 */
2547 2548 2549 2550 2551
/*
 * Note: returned pointer is the address of a structure that's
 * managed separately.  Caller must *not* attempt to free it.
 */
static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
2552
					int *proto, int force_new)
2553 2554 2555 2556
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
2557
	struct ceph_auth_handshake *auth = &o->o_auth;
2558

2559
	if (force_new && auth->authorizer) {
2560
		ceph_auth_destroy_authorizer(ac, auth->authorizer);
2561 2562
		auth->authorizer = NULL;
	}
2563 2564 2565
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
2566
		if (ret)
2567
			return ERR_PTR(ret);
2568 2569
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2570 2571 2572
						     auth);
		if (ret)
			return ERR_PTR(ret);
2573 2574
	}
	*proto = ac->protocol;
2575

2576
	return auth;
2577 2578 2579 2580 2581 2582 2583 2584 2585
}


static int verify_authorizer_reply(struct ceph_connection *con, int len)
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;

2586
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2587 2588
}

2589 2590 2591 2592 2593 2594
static int invalidate_authorizer(struct ceph_connection *con)
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;

2595
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2596 2597
	return ceph_monc_validate_auth(&osdc->client->monc);
}
2598

2599
static const struct ceph_connection_operations osd_con_ops = {
S
Sage Weil 已提交
2600 2601 2602
	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
2603 2604
	.get_authorizer = get_authorizer,
	.verify_authorizer_reply = verify_authorizer_reply,
2605
	.invalidate_authorizer = invalidate_authorizer,
S
Sage Weil 已提交
2606
	.alloc_msg = alloc_msg,
2607
	.fault = osd_reset,
S
Sage Weil 已提交
2608
};