osd_client.c 61.9 KB
Newer Older
1
#include <linux/ceph/ceph_debug.h>
S
Sage Weil 已提交
2

3
#include <linux/module.h>
S
Sage Weil 已提交
4 5 6 7 8 9
#include <linux/err.h>
#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
10 11 12
#ifdef CONFIG_BLOCK
#include <linux/bio.h>
#endif
S
Sage Weil 已提交
13

14 15 16 17 18 19
#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
20

S
Sage Weil 已提交
21 22
#define OSD_OP_FRONT_LEN	4096
#define OSD_OPREPLY_FRONT_LEN	512
23

24
static const struct ceph_connection_operations osd_con_ops;
S
Sage Weil 已提交
25

A
Alex Elder 已提交
26
static void __send_queued(struct ceph_osd_client *osdc);
27
static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
28 29 30 31
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);
32 33
static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req);
S
Sage Weil 已提交
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

/*
 * 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.
 */
60
static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
61
			u64 *objnum, u64 *objoff, u64 *objlen)
S
Sage Weil 已提交
62
{
63
	u64 orig_len = *plen;
S
Sage Weil 已提交
64
	int r;
S
Sage Weil 已提交
65

66
	/* object extent? */
67 68
	r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
					  objoff, objlen);
S
Sage Weil 已提交
69 70
	if (r < 0)
		return r;
71 72
	if (*objlen < orig_len) {
		*plen = *objlen;
73 74 75 76
		dout(" skipping last %llu, final file extent %llu~%llu\n",
		     orig_len - *plen, off, *plen);
	}

77
	dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
S
Sage Weil 已提交
78

79
	return 0;
S
Sage Weil 已提交
80 81
}

A
Alex Elder 已提交
82 83 84 85 86 87
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;
}

88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119
void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
			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;
}
EXPORT_SYMBOL(ceph_osd_data_pages_init);

void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
			struct ceph_pagelist *pagelist)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
	osd_data->pagelist = pagelist;
}
EXPORT_SYMBOL(ceph_osd_data_pagelist_init);

#ifdef CONFIG_BLOCK
void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
			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;
}
EXPORT_SYMBOL(ceph_osd_data_bio_init);
#endif /* CONFIG_BLOCK */

120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138
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
139 140 141 142 143 144 145 146 147 148 149 150 151 152
static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
{
	if (osd_data->type != CEPH_OSD_DATA_TYPE_PAGES)
		return;

	if (osd_data->own_pages) {
		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);
	}
}

S
Sage Weil 已提交
153 154 155
/*
 * requests
 */
S
Sage Weil 已提交
156
void ceph_osdc_release_request(struct kref *kref)
S
Sage Weil 已提交
157
{
A
Alex Elder 已提交
158
	struct ceph_osd_request *req;
S
Sage Weil 已提交
159

A
Alex Elder 已提交
160
	req = container_of(kref, struct ceph_osd_request, r_kref);
S
Sage Weil 已提交
161 162
	if (req->r_request)
		ceph_msg_put(req->r_request);
163
	if (req->r_reply) {
164
		ceph_msg_revoke_incoming(req->r_reply);
165
		ceph_msg_put(req->r_reply);
166
	}
167

A
Alex Elder 已提交
168 169
	ceph_osd_data_release(&req->r_data_in);
	ceph_osd_data_release(&req->r_data_out);
170

S
Sage Weil 已提交
171 172 173 174 175
	ceph_put_snap_context(req->r_snapc);
	if (req->r_mempool)
		mempool_free(req, req->r_osdc->req_mempool);
	else
		kfree(req);
S
Sage Weil 已提交
176
}
177
EXPORT_SYMBOL(ceph_osdc_release_request);
178

179
struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
S
Sage Weil 已提交
180
					       struct ceph_snap_context *snapc,
181
					       unsigned int num_ops,
182
					       bool use_mempool,
183
					       gfp_t gfp_flags)
S
Sage Weil 已提交
184 185 186
{
	struct ceph_osd_request *req;
	struct ceph_msg *msg;
187 188
	size_t msg_size;

189 190 191
	BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
	BUG_ON(num_ops > CEPH_OSD_MAX_OP);

192 193 194 195 196 197 198 199 200
	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
201 202

	if (use_mempool) {
203
		req = mempool_alloc(osdc->req_mempool, gfp_flags);
S
Sage Weil 已提交
204 205
		memset(req, 0, sizeof(*req));
	} else {
206
		req = kzalloc(sizeof(*req), gfp_flags);
S
Sage Weil 已提交
207 208
	}
	if (req == NULL)
209
		return NULL;
S
Sage Weil 已提交
210 211 212

	req->r_osdc = osdc;
	req->r_mempool = use_mempool;
213
	req->r_num_ops = num_ops;
214

S
Sage Weil 已提交
215
	kref_init(&req->r_kref);
S
Sage Weil 已提交
216 217
	init_completion(&req->r_completion);
	init_completion(&req->r_safe_completion);
218
	RB_CLEAR_NODE(&req->r_node);
S
Sage Weil 已提交
219
	INIT_LIST_HEAD(&req->r_unsafe_item);
220 221
	INIT_LIST_HEAD(&req->r_linger_item);
	INIT_LIST_HEAD(&req->r_linger_osd);
222
	INIT_LIST_HEAD(&req->r_req_lru_item);
223 224
	INIT_LIST_HEAD(&req->r_osd_item);

S
Sage Weil 已提交
225 226 227 228 229
	/* create reply message */
	if (use_mempool)
		msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
	else
		msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
230
				   OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
231
	if (!msg) {
S
Sage Weil 已提交
232
		ceph_osdc_put_request(req);
233
		return NULL;
S
Sage Weil 已提交
234 235 236
	}
	req->r_reply = msg;

A
Alex Elder 已提交
237 238
	ceph_osd_data_init(&req->r_data_in);
	ceph_osd_data_init(&req->r_data_out);
239

S
Sage Weil 已提交
240
	/* create request message; allow space for oid */
S
Sage Weil 已提交
241
	if (use_mempool)
242
		msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
S
Sage Weil 已提交
243
	else
244
		msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
245
	if (!msg) {
S
Sage Weil 已提交
246
		ceph_osdc_put_request(req);
247
		return NULL;
S
Sage Weil 已提交
248
	}
249

S
Sage Weil 已提交
250
	memset(msg->front.iov_base, 0, msg->front.iov_len);
251 252 253 254 255

	req->r_request = msg;

	return req;
}
256
EXPORT_SYMBOL(ceph_osdc_alloc_request);
257

258
static bool osd_req_opcode_valid(u16 opcode)
259
{
260
	switch (opcode) {
261
	case CEPH_OSD_OP_READ:
262
	case CEPH_OSD_OP_STAT:
263 264 265
	case CEPH_OSD_OP_MAPEXT:
	case CEPH_OSD_OP_MASKTRUNC:
	case CEPH_OSD_OP_SPARSE_READ:
266
	case CEPH_OSD_OP_NOTIFY:
267
	case CEPH_OSD_OP_NOTIFY_ACK:
268
	case CEPH_OSD_OP_ASSERT_VER:
269
	case CEPH_OSD_OP_WRITE:
270 271 272 273 274
	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:
275
	case CEPH_OSD_OP_STARTSYNC:
276 277 278 279 280 281
	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:
282
	case CEPH_OSD_OP_ROLLBACK:
283
	case CEPH_OSD_OP_WATCH:
284 285 286 287 288 289 290 291 292 293 294 295
	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:
296
	case CEPH_OSD_OP_GETXATTR:
297
	case CEPH_OSD_OP_GETXATTRS:
298 299
	case CEPH_OSD_OP_CMPXATTR:
	case CEPH_OSD_OP_SETXATTR:
300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317
	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:
318
	case CEPH_OSD_OP_CALL:
319 320
	case CEPH_OSD_OP_PGLS:
	case CEPH_OSD_OP_PGLS_FILTER:
321 322 323 324 325 326
		return true;
	default:
		return false;
	}
}

327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361
/*
 * 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.
 */
void osd_req_op_init(struct ceph_osd_req_op *op, u16 opcode)
{
	BUG_ON(!osd_req_opcode_valid(opcode));

	memset(op, 0, sizeof (*op));

	op->op = opcode;
}

void osd_req_op_extent_init(struct ceph_osd_req_op *op, u16 opcode,
				u64 offset, u64 length,
				u64 truncate_size, u32 truncate_seq)
{
	size_t payload_len = 0;

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

	osd_req_op_init(op, opcode);

	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);

362 363 364 365 366 367 368 369 370 371 372 373 374
void osd_req_op_extent_update(struct ceph_osd_req_op *op, u64 length)
{
	u64 previous = op->extent.length;

	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);

375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397
void osd_req_op_cls_init(struct ceph_osd_req_op *op, u16 opcode,
			const char *class, const char *method,
			const void *request_data, size_t request_data_size)
{
	size_t payload_len = 0;
	size_t size;

	BUG_ON(opcode != CEPH_OSD_OP_CALL);

	osd_req_op_init(op, opcode);

	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
	payload_len += size;

398
	op->cls.request_data = request_data;
399
	BUG_ON(request_data_size > (size_t) U32_MAX);
400
	op->cls.request_data_len = (u32) request_data_size;
401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423
	payload_len += request_data_size;

	op->cls.argc = 0;	/* currently unused */

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

void osd_req_op_watch_init(struct ceph_osd_req_op *op, u16 opcode,
				u64 cookie, u64 version, int flag)
{
	BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);

	osd_req_op_init(op, opcode);

	op->watch.cookie = cookie;
	/* op->watch.ver = version; */	/* XXX 3847 */
	op->watch.ver = cpu_to_le64(version);
	if (opcode == CEPH_OSD_OP_WATCH && flag)
		op->watch.flag = (u8) 1;
}
EXPORT_SYMBOL(osd_req_op_watch_init);

424
static u64 osd_req_encode_op(struct ceph_osd_request *req,
425
			      struct ceph_osd_op *dst, unsigned int which)
426
{
427
	struct ceph_osd_req_op *src;
428
	u64 request_data_len = 0;
429 430
	struct ceph_pagelist *pagelist;

431 432
	BUG_ON(which >= req->r_num_ops);
	src = &req->r_ops[which];
433 434 435 436 437 438 439 440 441 442 443 444
	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:
		break;
	case CEPH_OSD_OP_READ:
	case CEPH_OSD_OP_WRITE:
		if (src->op == CEPH_OSD_OP_WRITE)
445
			request_data_len = src->extent.length;
446 447 448 449 450 451 452 453 454 455 456 457 458 459
		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);
		break;
	case CEPH_OSD_OP_CALL:
		pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
		BUG_ON(!pagelist);
		ceph_pagelist_init(pagelist);

		dst->cls.class_len = src->cls.class_len;
		dst->cls.method_len = src->cls.method_len;
460
		dst->cls.indata_len = cpu_to_le32(src->cls.request_data_len);
461 462 463 464
		ceph_pagelist_append(pagelist, src->cls.class_name,
				     src->cls.class_len);
		ceph_pagelist_append(pagelist, src->cls.method_name,
				     src->cls.method_len);
465 466
		ceph_pagelist_append(pagelist, src->cls.request_data,
				     src->cls.request_data_len);
467

468
		ceph_osd_data_pagelist_init(&req->r_data_out, pagelist);
469
		request_data_len = pagelist->length;
470 471 472 473 474 475 476 477 478 479
		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:
480
		pr_err("unsupported osd opcode %s\n",
481
			ceph_osd_op_name(src->op));
482
		WARN_ON(1);
483 484

		return 0;
485
	}
486
	dst->op = cpu_to_le16(src->op);
487
	dst->payload_len = cpu_to_le32(src->payload_len);
488

489
	return request_data_len;
490 491
}

492 493 494 495
/*
 * build new request AND message
 *
 */
496 497 498
void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
				struct ceph_snap_context *snapc, u64 snap_id,
				struct timespec *mtime)
499 500 501
{
	struct ceph_msg *msg = req->r_request;
	void *p;
502
	size_t msg_size;
503
	int flags = req->r_flags;
504
	u64 data_len;
505
	unsigned int i;
506

507
	req->r_snapid = snap_id;
S
Sage Weil 已提交
508 509
	req->r_snapc = ceph_get_snap_context(snapc);

510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540
	/* 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);
541
	memcpy(p, req->r_oid, req->r_oid_len);
542
	dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
543
	p += req->r_oid_len;
S
Sage Weil 已提交
544

545
	/* ops--can imply data */
546
	ceph_encode_16(&p, (u16)req->r_num_ops);
547
	data_len = 0;
548 549
	for (i = 0; i < req->r_num_ops; i++) {
		data_len += osd_req_encode_op(req, p, i);
550 551
		p += sizeof(struct ceph_osd_op);
	}
552

553 554 555 556 557
	/* 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) {
S
Sage Weil 已提交
558
		for (i = 0; i < snapc->num_snaps; i++) {
559
			ceph_encode_64(&p, req->r_snapc->snaps[i]);
S
Sage Weil 已提交
560 561 562
		}
	}

563 564 565
	req->r_request_attempts = p;
	p += 4;

566
	/* data */
567 568 569 570 571 572 573 574 575 576 577 578
	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);
	}
579
	req->r_request->hdr.data_len = cpu_to_le32(data_len);
580

S
Sage Weil 已提交
581
	BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
582 583 584
	msg_size = p - msg->front.iov_base;
	msg->front.iov_len = msg_size;
	msg->hdr.front_len = cpu_to_le32(msg_size);
585

586
	dout("build_request msg_size was %d\n", (int)msg_size);
587
}
588
EXPORT_SYMBOL(ceph_osdc_build_request);
589 590 591 592 593 594 595 596 597 598 599 600 601 602 603

/*
 * 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,
604
					       u64 off, u64 *plen, int num_ops,
605 606 607 608
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
609
					       bool use_mempool)
610
{
611
	struct ceph_osd_request *req;
612
	struct ceph_osd_req_op *op;
613 614 615
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
616 617
	u32 object_size;
	u64 object_base;
618
	int r;
619

620
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
621

622
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
A
Alex Elder 已提交
623
					GFP_NOFS);
624
	if (!req)
625
		return ERR_PTR(-ENOMEM);
626

627
	req->r_flags = flags;
628 629

	/* calculate max write size */
630
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
631 632
	if (r < 0) {
		ceph_osdc_put_request(req);
633
		return ERR_PTR(r);
634
	}
635

636 637 638 639 640 641 642 643
	object_size = le32_to_cpu(layout->fl_object_size);
	object_base = off - objoff;
	if (truncate_size <= object_base) {
		truncate_size = 0;
	} else {
		truncate_size -= object_base;
		if (truncate_size > object_size)
			truncate_size = object_size;
644
	}
645

646 647
	op = &req->r_ops[0];
	osd_req_op_extent_init(op, opcode, objoff, objlen,
648
				truncate_size, truncate_seq);
649 650 651 652 653 654
	/*
	 * 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)
655
		osd_req_op_init(++op, CEPH_OSD_OP_STARTSYNC);
656

657 658
	req->r_file_layout = *layout;  /* keep a copy */

659 660
	snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
		vino.ino, objnum);
661 662
	req->r_oid_len = strlen(req->r_oid);

S
Sage Weil 已提交
663 664
	return req;
}
665
EXPORT_SYMBOL(ceph_osdc_new_request);
S
Sage Weil 已提交
666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731

/*
 * 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;
}

732 733 734 735 736 737
/*
 * Resubmit requests pending on the given osd.
 */
static void __kick_osd_requests(struct ceph_osd_client *osdc,
				struct ceph_osd *osd)
{
738
	struct ceph_osd_request *req, *nreq;
739
	LIST_HEAD(resend);
740 741 742 743
	int err;

	dout("__kick_osd_requests osd%d\n", osd->o_osd);
	err = __reset_osd(osdc, osd);
744
	if (err)
745
		return;
746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762
	/*
	 * 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.
	 */
763
	list_for_each_entry(req, &osd->o_requests, r_osd_item) {
764 765 766 767
		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,
768
		     osd->o_osd);
769 770 771
		if (!req->r_linger)
			req->r_flags |= CEPH_OSD_FLAG_RETRY;
	}
772
	list_splice(&resend, &osdc->req_unsent);
773

774 775 776 777 778
	/*
	 * 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.
	 */
779 780
	list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
				 r_linger_osd) {
781 782 783 784 785
		/*
		 * reregister request prior to unregistering linger so
		 * that r_osd is preserved.
		 */
		BUG_ON(!list_empty(&req->r_req_lru_item));
786
		__register_request(osdc, req);
787
		list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
788
		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
789
		__unregister_linger_request(osdc, req);
790 791
		dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
		     osd->o_osd);
792 793 794
	}
}

S
Sage Weil 已提交
795
/*
796
 * If the osd connection drops, we need to resubmit all requests.
S
Sage Weil 已提交
797 798 799 800 801 802 803 804 805 806 807
 */
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
808 809
	mutex_lock(&osdc->request_mutex);
	__kick_osd_requests(osdc, osd);
A
Alex Elder 已提交
810
	__send_queued(osdc);
S
Sage Weil 已提交
811
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
812 813 814 815 816 817
	up_read(&osdc->map_sem);
}

/*
 * Track open sessions with osds.
 */
818
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
S
Sage Weil 已提交
819 820 821 822 823 824 825 826 827
{
	struct ceph_osd *osd;

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

	atomic_set(&osd->o_ref, 1);
	osd->o_osdc = osdc;
828
	osd->o_osd = onum;
829
	RB_CLEAR_NODE(&osd->o_node);
S
Sage Weil 已提交
830
	INIT_LIST_HEAD(&osd->o_requests);
831
	INIT_LIST_HEAD(&osd->o_linger_requests);
832
	INIT_LIST_HEAD(&osd->o_osd_lru);
S
Sage Weil 已提交
833 834
	osd->o_incarnation = 1;

835
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
836

837
	INIT_LIST_HEAD(&osd->o_keepalive_item);
S
Sage Weil 已提交
838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856
	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);
857
	if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
S
Sage Weil 已提交
858 859
		struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;

860
		ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
S
Sage Weil 已提交
861
		kfree(osd);
S
Sage Weil 已提交
862
	}
S
Sage Weil 已提交
863 864 865 866 867
}

/*
 * remove an osd from our map
 */
868
static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
Sage Weil 已提交
869
{
870
	dout("__remove_osd %p\n", osd);
S
Sage Weil 已提交
871 872
	BUG_ON(!list_empty(&osd->o_requests));
	rb_erase(&osd->o_node, &osdc->osds);
873
	list_del_init(&osd->o_osd_lru);
S
Sage Weil 已提交
874 875 876 877
	ceph_con_close(&osd->o_con);
	put_osd(osd);
}

878 879
static void remove_all_osds(struct ceph_osd_client *osdc)
{
880
	dout("%s %p\n", __func__, osdc);
881 882 883 884 885 886 887 888 889
	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);
}

890 891 892 893 894 895
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);
896
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
897 898 899 900 901 902 903 904 905
}

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);
}

906
static void remove_old_osds(struct ceph_osd_client *osdc)
907 908 909 910 911 912
{
	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) {
913
		if (time_before(jiffies, osd->lru_ttl))
914 915 916 917 918 919
			break;
		__remove_osd(osdc, osd);
	}
	mutex_unlock(&osdc->request_mutex);
}

S
Sage Weil 已提交
920 921 922
/*
 * reset osd connect
 */
923
static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
Sage Weil 已提交
924
{
A
Alex Elder 已提交
925
	struct ceph_entity_addr *peer_addr;
S
Sage Weil 已提交
926

927
	dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
928 929
	if (list_empty(&osd->o_requests) &&
	    list_empty(&osd->o_linger_requests)) {
930
		__remove_osd(osdc, osd);
A
Alex Elder 已提交
931 932 933 934 935 936 937 938 939

		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;

940 941 942 943 944
		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
945 946

		return -EAGAIN;
S
Sage Weil 已提交
947
	}
A
Alex Elder 已提交
948 949 950 951 952 953

	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
954 955 956 957 958 959 960 961
}

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;

962
	dout("__insert_osd %p osd%d\n", new, new->o_osd);
S
Sage Weil 已提交
963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994
	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;
}

995 996 997
static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
{
	schedule_delayed_work(&osdc->timeout_work,
998
			osdc->client->options->osd_keepalive_timeout * HZ);
999 1000 1001 1002 1003 1004
}

static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
{
	cancel_delayed_work(&osdc->timeout_work);
}
S
Sage Weil 已提交
1005 1006 1007 1008 1009

/*
 * Register request, assign tid.  If this is the first request, set up
 * the timeout event.
 */
1010 1011
static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req)
S
Sage Weil 已提交
1012 1013
{
	req->r_tid = ++osdc->last_tid;
1014
	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1015
	dout("__register_request %p tid %lld\n", req, req->r_tid);
S
Sage Weil 已提交
1016 1017 1018 1019
	__insert_request(osdc, req);
	ceph_osdc_get_request(req);
	osdc->num_requests++;
	if (osdc->num_requests == 1) {
1020 1021
		dout(" first request, scheduling timeout\n");
		__schedule_osd_timeout(osdc);
S
Sage Weil 已提交
1022
	}
1023 1024
}

S
Sage Weil 已提交
1025 1026 1027 1028 1029 1030
/*
 * called under osdc->request_mutex
 */
static void __unregister_request(struct ceph_osd_client *osdc,
				 struct ceph_osd_request *req)
{
1031 1032 1033 1034 1035 1036
	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
1037 1038 1039 1040
	dout("__unregister_request %p tid %lld\n", req, req->r_tid);
	rb_erase(&req->r_node, &osdc->requests);
	osdc->num_requests--;

1041 1042
	if (req->r_osd) {
		/* make sure the original request isn't in flight. */
1043
		ceph_msg_revoke(req->r_request);
1044 1045

		list_del_init(&req->r_osd_item);
1046 1047 1048
		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);
1049
			__move_osd_to_lru(osdc, req->r_osd);
1050
		}
1051
		if (list_empty(&req->r_linger_item))
1052
			req->r_osd = NULL;
1053
	}
S
Sage Weil 已提交
1054

A
Alex Elder 已提交
1055
	list_del_init(&req->r_req_lru_item);
S
Sage Weil 已提交
1056 1057
	ceph_osdc_put_request(req);

1058 1059 1060
	if (osdc->num_requests == 0) {
		dout(" no requests, canceling timeout\n");
		__cancel_osd_timeout(osdc);
S
Sage Weil 已提交
1061 1062 1063 1064 1065 1066 1067 1068
	}
}

/*
 * Cancel a previously queued request message
 */
static void __cancel_request(struct ceph_osd_request *req)
{
1069
	if (req->r_sent && req->r_osd) {
1070
		ceph_msg_revoke(req->r_request);
S
Sage Weil 已提交
1071 1072 1073 1074
		req->r_sent = 0;
	}
}

1075 1076 1077 1078 1079
static void __register_linger_request(struct ceph_osd_client *osdc,
				    struct ceph_osd_request *req)
{
	dout("__register_linger_request %p\n", req);
	list_add_tail(&req->r_linger_item, &osdc->req_linger);
1080 1081 1082
	if (req->r_osd)
		list_add_tail(&req->r_linger_osd,
			      &req->r_osd->o_linger_requests);
1083 1084 1085 1086 1087 1088
}

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
1089
	list_del_init(&req->r_linger_item);
1090 1091 1092 1093 1094 1095 1096 1097
	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);
		}
1098 1099
		if (list_empty(&req->r_osd_item))
			req->r_osd = NULL;
1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129
	}
}

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) {
		__unregister_linger_request(osdc, req);
		ceph_osdc_put_request(req);
	}
	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;
		/*
		 * caller is now responsible for calling
		 * unregister_linger_request
		 */
		ceph_osdc_get_request(req);
	}
}
EXPORT_SYMBOL(ceph_osdc_set_request_linger);

S
Sage Weil 已提交
1130 1131 1132
/*
 * 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
1133
 * no up osd, set r_osd to NULL.  Move the request to the appropriate list
1134
 * (unsent, homeless) or leave on in-flight lru.
S
Sage Weil 已提交
1135 1136 1137 1138 1139
 *
 * Return 0 if unchanged, 1 if changed, or negative on error.
 *
 * Caller should hold map_sem for read and request_mutex.
 */
1140
static int __map_request(struct ceph_osd_client *osdc,
1141
			 struct ceph_osd_request *req, int force_resend)
S
Sage Weil 已提交
1142
{
1143
	struct ceph_pg pgid;
1144 1145
	int acting[CEPH_PG_MAX_SIZE];
	int o = -1, num = 0;
S
Sage Weil 已提交
1146 1147
	int err;

1148
	dout("map_request %p tid %lld\n", req, req->r_tid);
1149 1150
	err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
				ceph_file_layout_pg_pool(req->r_file_layout));
1151 1152
	if (err) {
		list_move(&req->r_req_lru_item, &osdc->req_notarget);
S
Sage Weil 已提交
1153
		return err;
1154
	}
1155 1156
	req->r_pgid = pgid;

1157 1158 1159 1160 1161
	err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
	if (err > 0) {
		o = acting[0];
		num = err;
	}
S
Sage Weil 已提交
1162

1163 1164
	if ((!force_resend &&
	     req->r_osd && req->r_osd->o_osd == o &&
1165 1166 1167
	     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
1168 1169 1170
	    (req->r_osd == NULL && o == -1))
		return 0;  /* no change */

1171 1172
	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
1173 1174
	     req->r_osd ? req->r_osd->o_osd : -1);

1175 1176 1177 1178
	/* 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
1179 1180 1181 1182 1183 1184 1185 1186
	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) {
1187
		err = -ENOMEM;
1188
		req->r_osd = create_osd(osdc, o);
1189 1190
		if (!req->r_osd) {
			list_move(&req->r_req_lru_item, &osdc->req_notarget);
1191
			goto out;
1192
		}
S
Sage Weil 已提交
1193

1194
		dout("map_request osd %p is osd%d\n", req->r_osd, o);
S
Sage Weil 已提交
1195 1196
		__insert_osd(osdc, req->r_osd);

1197 1198 1199
		ceph_con_open(&req->r_osd->o_con,
			      CEPH_ENTITY_TYPE_OSD, o,
			      &osdc->osdmap->osd_addr[o]);
S
Sage Weil 已提交
1200 1201
	}

1202 1203
	if (req->r_osd) {
		__remove_osd_from_lru(req->r_osd);
1204 1205
		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
		list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1206
	} else {
1207
		list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1208
	}
1209
	err = 1;   /* osd or pg changed */
S
Sage Weil 已提交
1210 1211 1212 1213 1214 1215 1216 1217

out:
	return err;
}

/*
 * caller should hold map_sem (for read) and request_mutex
 */
1218 1219
static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
S
Sage Weil 已提交
1220
{
1221
	void *p;
S
Sage Weil 已提交
1222

1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236
	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));
1237

S
Sage Weil 已提交
1238
	req->r_stamp = jiffies;
1239
	list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
S
Sage Weil 已提交
1240 1241 1242 1243 1244 1245

	ceph_msg_get(req->r_request); /* send consumes a ref */
	ceph_con_send(&req->r_osd->o_con, req->r_request);
	req->r_sent = req->r_osd->o_incarnation;
}

1246 1247 1248
/*
 * Send any requests in the queue (req_unsent).
 */
A
Alex Elder 已提交
1249
static void __send_queued(struct ceph_osd_client *osdc)
1250 1251 1252
{
	struct ceph_osd_request *req, *tmp;

A
Alex Elder 已提交
1253 1254
	dout("__send_queued\n");
	list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1255 1256 1257
		__send_request(osdc, req);
}

S
Sage Weil 已提交
1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270
/*
 * 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
1271
	struct ceph_osd_request *req;
S
Sage Weil 已提交
1272
	struct ceph_osd *osd;
1273
	unsigned long keepalive =
1274
		osdc->client->options->osd_keepalive_timeout * HZ;
1275
	struct list_head slow_osds;
S
Sage Weil 已提交
1276 1277 1278 1279 1280 1281 1282
	dout("timeout\n");
	down_read(&osdc->map_sem);

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

	mutex_lock(&osdc->request_mutex);

1283 1284 1285 1286 1287 1288 1289
	/*
	 * 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
1290
		if (time_before(jiffies, req->r_stamp + keepalive))
1291 1292 1293 1294 1295
			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
1296
		     req->r_tid, osd->o_osd);
1297 1298 1299 1300 1301 1302
		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
1303 1304 1305
		ceph_con_keepalive(&osd->o_con);
	}

1306
	__schedule_osd_timeout(osdc);
A
Alex Elder 已提交
1307
	__send_queued(osdc);
S
Sage Weil 已提交
1308 1309 1310 1311
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
}

1312 1313 1314 1315 1316 1317
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 =
1318
		osdc->client->options->osd_idle_ttl * HZ >> 2;
1319 1320 1321

	dout("osds timeout\n");
	down_read(&osdc->map_sem);
1322
	remove_old_osds(osdc);
1323 1324 1325 1326 1327 1328
	up_read(&osdc->map_sem);

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

S
Sage Weil 已提交
1329 1330 1331 1332 1333 1334 1335
static void complete_request(struct ceph_osd_request *req)
{
	if (req->r_safe_callback)
		req->r_safe_callback(req, NULL);
	complete_all(&req->r_safe_completion);  /* fsync waiter */
}

S
Sage Weil 已提交
1336 1337 1338 1339
/*
 * handle osd op reply.  either call the callback if it is specified,
 * or do the completion to wake up the waiting thread.
 */
1340 1341
static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
			 struct ceph_connection *con)
S
Sage Weil 已提交
1342
{
1343
	void *p, *end;
S
Sage Weil 已提交
1344 1345
	struct ceph_osd_request *req;
	u64 tid;
1346
	int object_len;
1347 1348
	unsigned int numops;
	int payload_len, flags;
1349
	s32 result;
1350 1351 1352 1353 1354 1355
	s32 retry_attempt;
	struct ceph_pg pg;
	int err;
	u32 reassert_epoch;
	u64 reassert_version;
	u32 osdmap_epoch;
1356
	int already_completed;
1357
	u32 bytes;
1358
	unsigned int i;
S
Sage Weil 已提交
1359

1360
	tid = le64_to_cpu(msg->hdr.tid);
1361 1362 1363 1364 1365 1366 1367 1368 1369 1370
	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;

1371
	err = ceph_decode_pgid(&p, end, &pg);
1372
	if (err)
S
Sage Weil 已提交
1373
		goto bad;
1374 1375 1376 1377 1378 1379 1380 1381

	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
1382 1383 1384 1385 1386
	/* lookup */
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (req == NULL) {
		dout("handle_reply tid %llu dne\n", tid);
1387
		goto bad_mutex;
S
Sage Weil 已提交
1388 1389
	}
	ceph_osdc_get_request(req);
1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411

	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);
	}
1412 1413
	bytes = le32_to_cpu(msg->hdr.data_len);
	if (payload_len != bytes) {
1414
		pr_warning("sum of op payload lens %d != data_len %d",
1415
			   payload_len, bytes);
1416 1417 1418 1419 1420 1421 1422
		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
1423 1424 1425

	if (!req->r_got_reply) {

1426
		req->r_result = result;
S
Sage Weil 已提交
1427 1428 1429 1430 1431 1432
		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, */
1433 1434
		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
1435 1436 1437 1438

		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
1439
		mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1440 1441 1442 1443 1444
		goto done;
	}

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

1445 1446 1447
	if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
		__register_linger_request(osdc, req);

S
Sage Weil 已提交
1448
	/* either this is a read, or we got the safe response */
1449 1450
	if (result < 0 ||
	    (flags & CEPH_OSD_FLAG_ONDISK) ||
S
Sage Weil 已提交
1451 1452 1453
	    ((flags & CEPH_OSD_FLAG_WRITE) == 0))
		__unregister_request(osdc, req);

1454 1455
	already_completed = req->r_completed;
	req->r_completed = 1;
S
Sage Weil 已提交
1456
	mutex_unlock(&osdc->request_mutex);
1457 1458
	if (already_completed)
		goto done;
S
Sage Weil 已提交
1459 1460 1461 1462

	if (req->r_callback)
		req->r_callback(req, msg);
	else
1463
		complete_all(&req->r_completion);
S
Sage Weil 已提交
1464

S
Sage Weil 已提交
1465 1466
	if (flags & CEPH_OSD_FLAG_ONDISK)
		complete_request(req);
S
Sage Weil 已提交
1467 1468

done:
1469
	dout("req=%p req->r_linger=%d\n", req, req->r_linger);
S
Sage Weil 已提交
1470 1471 1472
	ceph_osdc_put_request(req);
	return;

1473 1474
bad_put:
	ceph_osdc_put_request(req);
1475 1476
bad_mutex:
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1477
bad:
1478 1479
	pr_err("corrupt osd_op_reply got %d %d\n",
	       (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1480
	ceph_msg_dump(msg);
S
Sage Weil 已提交
1481 1482
}

1483
static void reset_changed_osds(struct ceph_osd_client *osdc)
S
Sage Weil 已提交
1484 1485 1486
{
	struct rb_node *p, *n;

1487 1488
	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
1489

1490 1491 1492 1493 1494 1495 1496
		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
1497
	}
1498 1499 1500
}

/*
1501 1502
 * Requeue requests whose mapping to an OSD has changed.  If requests map to
 * no osd, request a new map.
1503
 *
1504
 * Caller should hold map_sem for read.
1505
 */
1506
static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
1507
{
1508
	struct ceph_osd_request *req, *nreq;
1509 1510 1511
	struct rb_node *p;
	int needmap = 0;
	int err;
1512

1513
	dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
1514
	mutex_lock(&osdc->request_mutex);
1515
	for (p = rb_first(&osdc->requests); p; ) {
1516
		req = rb_entry(p, struct ceph_osd_request, r_node);
1517
		p = rb_next(p);
1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535

		/*
		 * 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);
			__unregister_request(osdc, req);
			__register_linger_request(osdc, req);
			continue;
		}

1536
		err = __map_request(osdc, req, force_resend);
1537 1538 1539 1540 1541 1542
		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) {
1543 1544 1545 1546
			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);
1547
				req->r_flags |= CEPH_OSD_FLAG_RETRY;
1548 1549
			}
		}
1550 1551 1552 1553 1554 1555
	}

	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);

1556
		err = __map_request(osdc, req, force_resend);
1557
		dout("__map_request returned %d\n", err);
1558 1559 1560 1561 1562 1563 1564 1565
		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;
1566
		}
1567 1568 1569 1570

		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);
1571
		__unregister_linger_request(osdc, req);
1572
	}
S
Sage Weil 已提交
1573 1574 1575 1576 1577 1578
	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);
	}
1579
	reset_changed_osds(osdc);
1580
}
1581 1582


S
Sage Weil 已提交
1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605
/*
 * 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));
1606 1607
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
		return;
S
Sage Weil 已提交
1608 1609 1610 1611 1612 1613 1614 1615

	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);
1616 1617
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
1618 1619 1620 1621 1622 1623 1624
		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,
1625
							  &osdc->client->msgr);
S
Sage Weil 已提交
1626 1627 1628 1629
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
1630
			BUG_ON(!newmap);
S
Sage Weil 已提交
1631 1632 1633 1634
			if (newmap != osdc->osdmap) {
				ceph_osdmap_destroy(osdc->osdmap);
				osdc->osdmap = newmap;
			}
1635
			kick_requests(osdc, 0);
S
Sage Weil 已提交
1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650
		} 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);
1651 1652
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
1653 1654 1655 1656 1657 1658 1659 1660 1661
		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 {
1662 1663
			int skipped_map = 0;

S
Sage Weil 已提交
1664 1665 1666 1667 1668 1669
			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;
			}
1670
			BUG_ON(!newmap);
S
Sage Weil 已提交
1671 1672
			oldmap = osdc->osdmap;
			osdc->osdmap = newmap;
1673 1674 1675
			if (oldmap) {
				if (oldmap->epoch + 1 < newmap->epoch)
					skipped_map = 1;
S
Sage Weil 已提交
1676
				ceph_osdmap_destroy(oldmap);
1677 1678
			}
			kick_requests(osdc, skipped_map);
S
Sage Weil 已提交
1679 1680 1681 1682 1683 1684 1685 1686
		}
		p += maplen;
		nr_maps--;
	}

done:
	downgrade_write(&osdc->map_sem);
	ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1687 1688 1689 1690 1691 1692 1693 1694 1695

	/*
	 * 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
1696 1697 1698
	mutex_lock(&osdc->request_mutex);
	__send_queued(osdc);
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1699
	up_read(&osdc->map_sem);
1700
	wake_up_all(&osdc->client->auth_wq);
S
Sage Weil 已提交
1701 1702 1703 1704
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
1705
	ceph_msg_dump(msg);
S
Sage Weil 已提交
1706 1707 1708 1709
	up_write(&osdc->map_sem);
	return;
}

1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791
/*
 * 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 *),
1792
			   void *data, struct ceph_osd_event **pevent)
1793 1794 1795 1796 1797 1798 1799 1800 1801
{
	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;
1802
	event->one_shot = 0;
1803 1804 1805
	event->data = data;
	event->osdc = osdc;
	INIT_LIST_HEAD(&event->osd_node);
1806
	RB_CLEAR_NODE(&event->node);
1807 1808 1809 1810 1811 1812 1813 1814 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
	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
 */
1853 1854
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874
{
	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) {
1875
		BUG_ON(event->one_shot);
1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886
		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;
		}
1887
		INIT_WORK(&event_work->work, do_event_work);
1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908
		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;
}

1909 1910
static void ceph_osdc_msg_data_set(struct ceph_msg *msg,
				struct ceph_osd_data *osd_data)
S
Sage Weil 已提交
1911
{
1912 1913
	u64 length = ceph_osd_data_length(osd_data);

1914
	if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
1915 1916
		BUG_ON(length > (u64) SIZE_MAX);
		if (length)
1917
			ceph_msg_data_set_pages(msg, osd_data->pages,
1918
					length, osd_data->alignment);
1919
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
1920
		BUG_ON(!length);
1921
		ceph_msg_data_set_pagelist(msg, osd_data->pagelist);
1922
#ifdef CONFIG_BLOCK
1923
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
1924
		ceph_msg_data_set_bio(msg, osd_data->bio, length);
1925
#endif
1926
	} else {
1927
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
1928
	}
1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943
}

/*
 * 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;

	/* Set up response incoming data and request outgoing data fields */

	ceph_osdc_msg_data_set(req->r_reply, &req->r_data_in);
	ceph_osdc_msg_data_set(req->r_request, &req->r_data_out);
S
Sage Weil 已提交
1944 1945 1946

	down_read(&osdc->map_sem);
	mutex_lock(&osdc->request_mutex);
1947
	__register_request(osdc, req);
1948 1949 1950 1951 1952 1953 1954
	WARN_ON(req->r_sent);
	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;
S
Sage Weil 已提交
1955
		}
1956
		goto out_unlock;
S
Sage Weil 已提交
1957
	}
1958 1959 1960 1961
	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 {
1962
		__send_queued(osdc);
1963 1964
	}
	rc = 0;
1965
out_unlock:
S
Sage Weil 已提交
1966 1967 1968 1969
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
	return rc;
}
1970
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983

/*
 * 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);
1984
		__unregister_request(osdc, req);
S
Sage Weil 已提交
1985
		mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1986
		complete_request(req);
1987
		dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
S
Sage Weil 已提交
1988 1989 1990 1991 1992 1993
		return rc;
	}

	dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
	return req->r_result;
}
1994
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027

/*
 * 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);
}
2028
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045

/*
 * 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;
2046
	INIT_LIST_HEAD(&osdc->osd_lru);
S
Sage Weil 已提交
2047
	osdc->requests = RB_ROOT;
2048
	INIT_LIST_HEAD(&osdc->req_lru);
2049 2050
	INIT_LIST_HEAD(&osdc->req_unsent);
	INIT_LIST_HEAD(&osdc->req_notarget);
2051
	INIT_LIST_HEAD(&osdc->req_linger);
S
Sage Weil 已提交
2052 2053
	osdc->num_requests = 0;
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2054
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2055 2056 2057
	spin_lock_init(&osdc->event_lock);
	osdc->event_tree = RB_ROOT;
	osdc->event_count = 0;
2058 2059

	schedule_delayed_work(&osdc->osds_timeout_work,
2060
	   round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
S
Sage Weil 已提交
2061

2062
	err = -ENOMEM;
S
Sage Weil 已提交
2063 2064 2065
	osdc->req_mempool = mempool_create_kmalloc_pool(10,
					sizeof(struct ceph_osd_request));
	if (!osdc->req_mempool)
2066
		goto out;
S
Sage Weil 已提交
2067

2068 2069
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
				OSD_OP_FRONT_LEN, 10, true,
2070
				"osd_op");
S
Sage Weil 已提交
2071
	if (err < 0)
2072
		goto out_mempool;
2073
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2074 2075
				OSD_OPREPLY_FRONT_LEN, 10, true,
				"osd_op_reply");
S
Sage Weil 已提交
2076 2077
	if (err < 0)
		goto out_msgpool;
2078 2079 2080 2081 2082 2083 2084

	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
2085
	return 0;
2086

S
Sage Weil 已提交
2087 2088
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
2089 2090 2091 2092
out_mempool:
	mempool_destroy(osdc->req_mempool);
out:
	return err;
S
Sage Weil 已提交
2093 2094 2095 2096
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
2097 2098
	flush_workqueue(osdc->notify_wq);
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
2099
	cancel_delayed_work_sync(&osdc->timeout_work);
2100
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
S
Sage Weil 已提交
2101 2102 2103 2104
	if (osdc->osdmap) {
		ceph_osdmap_destroy(osdc->osdmap);
		osdc->osdmap = NULL;
	}
2105
	remove_all_osds(osdc);
S
Sage Weil 已提交
2106 2107
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
2108
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2109 2110 2111 2112 2113 2114 2115 2116 2117 2118
}

/*
 * 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,
2119
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
2120 2121 2122 2123 2124 2125
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
2126
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
S
Sage Weil 已提交
2127
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2128
				    NULL, truncate_seq, truncate_size,
2129
				    false);
2130 2131
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2132 2133

	/* it may be a short read due to an object boundary */
2134

2135 2136
	ceph_osd_data_pages_init(&req->r_data_in, pages, *plen, page_align,
				false, false);
S
Sage Weil 已提交
2137

2138
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
2139
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
2140

2141
	ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2142

S
Sage Weil 已提交
2143 2144 2145 2146 2147 2148 2149 2150
	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;
}
2151
EXPORT_SYMBOL(ceph_osdc_readpages);
S
Sage Weil 已提交
2152 2153 2154 2155 2156 2157 2158 2159 2160 2161

/*
 * 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,
2162
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
2163 2164 2165
{
	struct ceph_osd_request *req;
	int rc = 0;
2166
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
2167

2168
	BUG_ON(vino.snap != CEPH_NOSNAP);	/* snapshots aren't writeable */
2169
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
S
Sage Weil 已提交
2170
				    CEPH_OSD_OP_WRITE,
2171
				    CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2172
				    snapc, truncate_seq, truncate_size,
2173
				    true);
2174 2175
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2176 2177

	/* it may be a short write due to an object boundary */
2178 2179 2180
	ceph_osd_data_pages_init(&req->r_data_out, pages, len, page_align,
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
2181

2182
	ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2183

2184
	rc = ceph_osdc_start_request(osdc, req, true);
S
Sage Weil 已提交
2185 2186 2187 2188 2189 2190 2191 2192 2193
	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;
}
2194
EXPORT_SYMBOL(ceph_osdc_writepages);
S
Sage Weil 已提交
2195 2196 2197 2198 2199 2200 2201

/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
2202
	struct ceph_osd_client *osdc;
S
Sage Weil 已提交
2203 2204 2205
	int type = le16_to_cpu(msg->hdr.type);

	if (!osd)
S
Sage Weil 已提交
2206
		goto out;
2207
	osdc = osd->o_osdc;
S
Sage Weil 已提交
2208 2209 2210 2211 2212 2213

	switch (type) {
	case CEPH_MSG_OSD_MAP:
		ceph_osdc_handle_map(osdc, msg);
		break;
	case CEPH_MSG_OSD_OPREPLY:
2214
		handle_reply(osdc, msg, con);
S
Sage Weil 已提交
2215
		break;
2216 2217 2218
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
Sage Weil 已提交
2219 2220 2221 2222 2223

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
S
Sage Weil 已提交
2224
out:
S
Sage Weil 已提交
2225 2226 2227
	ceph_msg_put(msg);
}

2228
/*
2229 2230
 * lookup and return message for incoming reply.  set up reply message
 * pages.
2231 2232
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
2233 2234
				  struct ceph_msg_header *hdr,
				  int *skip)
S
Sage Weil 已提交
2235 2236 2237
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
2238
	struct ceph_msg *m;
2239
	struct ceph_osd_request *req;
2240 2241
	int front = le32_to_cpu(hdr->front_len);
	int data_len = le32_to_cpu(hdr->data_len);
2242
	u64 tid;
S
Sage Weil 已提交
2243

2244 2245 2246 2247 2248 2249
	tid = le64_to_cpu(hdr->tid);
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (!req) {
		*skip = 1;
		m = NULL;
2250 2251
		dout("get_reply unknown tid %llu from osd%d\n", tid,
		     osd->o_osd);
2252 2253
		goto out;
	}
S
Sage Weil 已提交
2254

2255
	if (req->r_reply->con)
2256
		dout("%s revoking msg %p from old con %p\n", __func__,
2257 2258
		     req->r_reply, req->r_reply->con);
	ceph_msg_revoke_incoming(req->r_reply);
2259

S
Sage Weil 已提交
2260 2261 2262
	if (front > req->r_reply->front.iov_len) {
		pr_warning("get_reply front %d > preallocated %d\n",
			   front, (int)req->r_reply->front.iov_len);
2263
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
2264
		if (!m)
S
Sage Weil 已提交
2265 2266 2267 2268 2269 2270
			goto out;
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
	m = ceph_msg_get(req->r_reply);

2271
	if (data_len > 0) {
2272 2273 2274 2275
		struct ceph_osd_data *osd_data = &req->r_data_in;

		if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
			if (osd_data->pages &&
2276
				unlikely(osd_data->length < data_len)) {
2277

2278 2279 2280
				pr_warning("tid %lld reply has %d bytes "
					"we had only %llu bytes ready\n",
					tid, data_len, osd_data->length);
2281 2282 2283 2284 2285 2286
				*skip = 1;
				ceph_msg_put(m);
				m = NULL;
				goto out;
			}
		}
2287
	}
2288
	*skip = 0;
S
Sage Weil 已提交
2289
	dout("get_reply tid %lld %p\n", tid, m);
2290 2291 2292

out:
	mutex_unlock(&osdc->request_mutex);
2293
	return m;
2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304

}

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
2305
	*skip = 0;
2306 2307
	switch (type) {
	case CEPH_MSG_OSD_MAP:
2308
	case CEPH_MSG_WATCH_NOTIFY:
2309
		return ceph_msg_new(type, front, GFP_NOFS, false);
2310 2311 2312 2313 2314 2315 2316 2317
	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
2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336
}

/*
 * 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);
}

2337 2338 2339
/*
 * authentication
 */
2340 2341 2342 2343 2344
/*
 * 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,
2345
					int *proto, int force_new)
2346 2347 2348 2349
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
2350
	struct ceph_auth_handshake *auth = &o->o_auth;
2351

2352
	if (force_new && auth->authorizer) {
2353
		ceph_auth_destroy_authorizer(ac, auth->authorizer);
2354 2355
		auth->authorizer = NULL;
	}
2356 2357 2358
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
2359
		if (ret)
2360
			return ERR_PTR(ret);
2361 2362
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2363 2364 2365
						     auth);
		if (ret)
			return ERR_PTR(ret);
2366 2367
	}
	*proto = ac->protocol;
2368

2369
	return auth;
2370 2371 2372 2373 2374 2375 2376 2377 2378
}


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;

2379
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2380 2381
}

2382 2383 2384 2385 2386 2387
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;

2388
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2389 2390
	return ceph_monc_validate_auth(&osdc->client->monc);
}
2391

2392
static const struct ceph_connection_operations osd_con_ops = {
S
Sage Weil 已提交
2393 2394 2395
	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
2396 2397
	.get_authorizer = get_authorizer,
	.verify_authorizer_reply = verify_authorizer_reply,
2398
	.invalidate_authorizer = invalidate_authorizer,
S
Sage Weil 已提交
2399
	.alloc_msg = alloc_msg,
2400
	.fault = osd_reset,
S
Sage Weil 已提交
2401
};