1// SPDX-License-Identifier: GPL-2.0
   2
   3#include <linux/ceph/ceph_debug.h>
   4
   5#include <linux/module.h>
   6#include <linux/err.h>
   7#include <linux/highmem.h>
   8#include <linux/mm.h>
   9#include <linux/pagemap.h>
  10#include <linux/slab.h>
  11#include <linux/uaccess.h>
  12#ifdef CONFIG_BLOCK
  13#include <linux/bio.h>
  14#endif
  15
  16#include <linux/ceph/ceph_features.h>
  17#include <linux/ceph/libceph.h>
  18#include <linux/ceph/osd_client.h>
  19#include <linux/ceph/messenger.h>
  20#include <linux/ceph/decode.h>
  21#include <linux/ceph/auth.h>
  22#include <linux/ceph/pagelist.h>
  23#include <linux/ceph/striper.h>
  24
  25#define OSD_OPREPLY_FRONT_LEN	512
  26
  27static struct kmem_cache	*ceph_osd_request_cache;
  28
  29static const struct ceph_connection_operations osd_con_ops;
  30
  31/*
  32 * Implement client access to distributed object storage cluster.
  33 *
  34 * All data objects are stored within a cluster/cloud of OSDs, or
  35 * "object storage devices."  (Note that Ceph OSDs have _nothing_ to
  36 * do with the T10 OSD extensions to SCSI.)  Ceph OSDs are simply
  37 * remote daemons serving up and coordinating consistent and safe
  38 * access to storage.
  39 *
  40 * Cluster membership and the mapping of data objects onto storage devices
  41 * are described by the osd map.
  42 *
  43 * We keep track of pending OSD requests (read, write), resubmit
  44 * requests to different OSDs when the cluster topology/data layout
  45 * change, or retry the affected requests when the communications
  46 * channel with an OSD is reset.
  47 */
  48
  49static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
  50static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
  51static void link_linger(struct ceph_osd *osd,
  52			struct ceph_osd_linger_request *lreq);
  53static void unlink_linger(struct ceph_osd *osd,
  54			  struct ceph_osd_linger_request *lreq);
  55static void clear_backoffs(struct ceph_osd *osd);
  56
  57#if 1
  58static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
  59{
  60	bool wrlocked = true;
  61
  62	if (unlikely(down_read_trylock(sem))) {
  63		wrlocked = false;
  64		up_read(sem);
  65	}
  66
  67	return wrlocked;
  68}
  69static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
  70{
  71	WARN_ON(!rwsem_is_locked(&osdc->lock));
  72}
  73static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
  74{
  75	WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
  76}
  77static inline void verify_osd_locked(struct ceph_osd *osd)
  78{
  79	struct ceph_osd_client *osdc = osd->o_osdc;
  80
  81	WARN_ON(!(mutex_is_locked(&osd->lock) &&
  82		  rwsem_is_locked(&osdc->lock)) &&
  83		!rwsem_is_wrlocked(&osdc->lock));
  84}
  85static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
  86{
  87	WARN_ON(!mutex_is_locked(&lreq->lock));
  88}
  89#else
  90static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
  91static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
  92static inline void verify_osd_locked(struct ceph_osd *osd) { }
  93static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
  94#endif
  95
  96/*
  97 * calculate the mapping of a file extent onto an object, and fill out the
  98 * request accordingly.  shorten extent as necessary if it crosses an
  99 * object boundary.
 100 *
 101 * fill osd op in request message.
 102 */
 103static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
 104			u64 *objnum, u64 *objoff, u64 *objlen)
 105{
 106	u64 orig_len = *plen;
 107	u32 xlen;
 108
 109	/* object extent? */
 110	ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
 111					  objoff, &xlen);
 112	*objlen = xlen;
 113	if (*objlen < orig_len) {
 114		*plen = *objlen;
 115		dout(" skipping last %llu, final file extent %llu~%llu\n",
 116		     orig_len - *plen, off, *plen);
 117	}
 118
 119	dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
 120	return 0;
 121}
 122
 123static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
 124{
 125	memset(osd_data, 0, sizeof (*osd_data));
 126	osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
 127}
 128
 129/*
 130 * Consumes @pages if @own_pages is true.
 131 */
 132static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
 133			struct page **pages, u64 length, u32 alignment,
 134			bool pages_from_pool, bool own_pages)
 135{
 136	osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
 137	osd_data->pages = pages;
 138	osd_data->length = length;
 139	osd_data->alignment = alignment;
 140	osd_data->pages_from_pool = pages_from_pool;
 141	osd_data->own_pages = own_pages;
 142}
 143
 144/*
 145 * Consumes a ref on @pagelist.
 146 */
 147static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
 148			struct ceph_pagelist *pagelist)
 149{
 150	osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
 151	osd_data->pagelist = pagelist;
 152}
 153
 154#ifdef CONFIG_BLOCK
 155static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
 156				   struct ceph_bio_iter *bio_pos,
 157				   u32 bio_length)
 158{
 159	osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
 160	osd_data->bio_pos = *bio_pos;
 161	osd_data->bio_length = bio_length;
 162}
 163#endif /* CONFIG_BLOCK */
 164
 165static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
 166				     struct ceph_bvec_iter *bvec_pos,
 167				     u32 num_bvecs)
 168{
 169	osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
 170	osd_data->bvec_pos = *bvec_pos;
 171	osd_data->num_bvecs = num_bvecs;
 172}
 173
 
 
 
 
 
 
 
 174static struct ceph_osd_data *
 175osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
 176{
 177	BUG_ON(which >= osd_req->r_num_ops);
 178
 179	return &osd_req->r_ops[which].raw_data_in;
 180}
 181
 182struct ceph_osd_data *
 183osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
 184			unsigned int which)
 185{
 186	return osd_req_op_data(osd_req, which, extent, osd_data);
 187}
 188EXPORT_SYMBOL(osd_req_op_extent_osd_data);
 189
 190void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
 191			unsigned int which, struct page **pages,
 192			u64 length, u32 alignment,
 193			bool pages_from_pool, bool own_pages)
 194{
 195	struct ceph_osd_data *osd_data;
 196
 197	osd_data = osd_req_op_raw_data_in(osd_req, which);
 198	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 199				pages_from_pool, own_pages);
 200}
 201EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
 202
 203void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
 204			unsigned int which, struct page **pages,
 205			u64 length, u32 alignment,
 206			bool pages_from_pool, bool own_pages)
 207{
 208	struct ceph_osd_data *osd_data;
 209
 210	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 211	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 212				pages_from_pool, own_pages);
 213}
 214EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
 215
 216void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
 217			unsigned int which, struct ceph_pagelist *pagelist)
 218{
 219	struct ceph_osd_data *osd_data;
 220
 221	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 222	ceph_osd_data_pagelist_init(osd_data, pagelist);
 223}
 224EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
 225
 226#ifdef CONFIG_BLOCK
 227void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
 228				    unsigned int which,
 229				    struct ceph_bio_iter *bio_pos,
 230				    u32 bio_length)
 231{
 232	struct ceph_osd_data *osd_data;
 233
 234	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 235	ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
 236}
 237EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
 238#endif /* CONFIG_BLOCK */
 239
 240void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
 241				      unsigned int which,
 242				      struct bio_vec *bvecs, u32 num_bvecs,
 243				      u32 bytes)
 244{
 245	struct ceph_osd_data *osd_data;
 246	struct ceph_bvec_iter it = {
 247		.bvecs = bvecs,
 248		.iter = { .bi_size = bytes },
 249	};
 250
 251	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 252	ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
 253}
 254EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);
 255
 256void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
 257					 unsigned int which,
 258					 struct ceph_bvec_iter *bvec_pos)
 259{
 260	struct ceph_osd_data *osd_data;
 261
 262	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
 263	ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
 264}
 265EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
 266
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 267static void osd_req_op_cls_request_info_pagelist(
 268			struct ceph_osd_request *osd_req,
 269			unsigned int which, struct ceph_pagelist *pagelist)
 270{
 271	struct ceph_osd_data *osd_data;
 272
 273	osd_data = osd_req_op_data(osd_req, which, cls, request_info);
 274	ceph_osd_data_pagelist_init(osd_data, pagelist);
 275}
 276
 277void osd_req_op_cls_request_data_pagelist(
 278			struct ceph_osd_request *osd_req,
 279			unsigned int which, struct ceph_pagelist *pagelist)
 280{
 281	struct ceph_osd_data *osd_data;
 282
 283	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
 284	ceph_osd_data_pagelist_init(osd_data, pagelist);
 285	osd_req->r_ops[which].cls.indata_len += pagelist->length;
 286	osd_req->r_ops[which].indata_len += pagelist->length;
 287}
 288EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
 289
 290void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
 291			unsigned int which, struct page **pages, u64 length,
 292			u32 alignment, bool pages_from_pool, bool own_pages)
 293{
 294	struct ceph_osd_data *osd_data;
 295
 296	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
 297	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 298				pages_from_pool, own_pages);
 299	osd_req->r_ops[which].cls.indata_len += length;
 300	osd_req->r_ops[which].indata_len += length;
 301}
 302EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
 303
 304void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
 305				       unsigned int which,
 306				       struct bio_vec *bvecs, u32 num_bvecs,
 307				       u32 bytes)
 308{
 309	struct ceph_osd_data *osd_data;
 310	struct ceph_bvec_iter it = {
 311		.bvecs = bvecs,
 312		.iter = { .bi_size = bytes },
 313	};
 314
 315	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
 316	ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
 317	osd_req->r_ops[which].cls.indata_len += bytes;
 318	osd_req->r_ops[which].indata_len += bytes;
 319}
 320EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);
 321
 322void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
 323			unsigned int which, struct page **pages, u64 length,
 324			u32 alignment, bool pages_from_pool, bool own_pages)
 325{
 326	struct ceph_osd_data *osd_data;
 327
 328	osd_data = osd_req_op_data(osd_req, which, cls, response_data);
 329	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
 330				pages_from_pool, own_pages);
 331}
 332EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
 333
 334static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
 335{
 336	switch (osd_data->type) {
 337	case CEPH_OSD_DATA_TYPE_NONE:
 338		return 0;
 339	case CEPH_OSD_DATA_TYPE_PAGES:
 340		return osd_data->length;
 341	case CEPH_OSD_DATA_TYPE_PAGELIST:
 342		return (u64)osd_data->pagelist->length;
 343#ifdef CONFIG_BLOCK
 344	case CEPH_OSD_DATA_TYPE_BIO:
 345		return (u64)osd_data->bio_length;
 346#endif /* CONFIG_BLOCK */
 347	case CEPH_OSD_DATA_TYPE_BVECS:
 348		return osd_data->bvec_pos.iter.bi_size;
 
 
 349	default:
 350		WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
 351		return 0;
 352	}
 353}
 354
 355static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
 356{
 357	if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
 358		int num_pages;
 359
 360		num_pages = calc_pages_for((u64)osd_data->alignment,
 361						(u64)osd_data->length);
 362		ceph_release_page_vector(osd_data->pages, num_pages);
 363	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
 364		ceph_pagelist_release(osd_data->pagelist);
 365	}
 366	ceph_osd_data_init(osd_data);
 367}
 368
 369static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
 370			unsigned int which)
 371{
 372	struct ceph_osd_req_op *op;
 373
 374	BUG_ON(which >= osd_req->r_num_ops);
 375	op = &osd_req->r_ops[which];
 376
 377	switch (op->op) {
 378	case CEPH_OSD_OP_READ:
 
 379	case CEPH_OSD_OP_WRITE:
 380	case CEPH_OSD_OP_WRITEFULL:
 
 381		ceph_osd_data_release(&op->extent.osd_data);
 382		break;
 383	case CEPH_OSD_OP_CALL:
 384		ceph_osd_data_release(&op->cls.request_info);
 385		ceph_osd_data_release(&op->cls.request_data);
 386		ceph_osd_data_release(&op->cls.response_data);
 387		break;
 388	case CEPH_OSD_OP_SETXATTR:
 389	case CEPH_OSD_OP_CMPXATTR:
 390		ceph_osd_data_release(&op->xattr.osd_data);
 391		break;
 392	case CEPH_OSD_OP_STAT:
 393		ceph_osd_data_release(&op->raw_data_in);
 394		break;
 395	case CEPH_OSD_OP_NOTIFY_ACK:
 396		ceph_osd_data_release(&op->notify_ack.request_data);
 397		break;
 398	case CEPH_OSD_OP_NOTIFY:
 399		ceph_osd_data_release(&op->notify.request_data);
 400		ceph_osd_data_release(&op->notify.response_data);
 401		break;
 402	case CEPH_OSD_OP_LIST_WATCHERS:
 403		ceph_osd_data_release(&op->list_watchers.response_data);
 404		break;
 405	case CEPH_OSD_OP_COPY_FROM2:
 406		ceph_osd_data_release(&op->copy_from.osd_data);
 407		break;
 408	default:
 409		break;
 410	}
 411}
 412
 413/*
 414 * Assumes @t is zero-initialized.
 415 */
 416static void target_init(struct ceph_osd_request_target *t)
 417{
 418	ceph_oid_init(&t->base_oid);
 419	ceph_oloc_init(&t->base_oloc);
 420	ceph_oid_init(&t->target_oid);
 421	ceph_oloc_init(&t->target_oloc);
 422
 423	ceph_osds_init(&t->acting);
 424	ceph_osds_init(&t->up);
 425	t->size = -1;
 426	t->min_size = -1;
 427
 428	t->osd = CEPH_HOMELESS_OSD;
 429}
 430
 431static void target_copy(struct ceph_osd_request_target *dest,
 432			const struct ceph_osd_request_target *src)
 433{
 434	ceph_oid_copy(&dest->base_oid, &src->base_oid);
 435	ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
 436	ceph_oid_copy(&dest->target_oid, &src->target_oid);
 437	ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
 438
 439	dest->pgid = src->pgid; /* struct */
 440	dest->spgid = src->spgid; /* struct */
 441	dest->pg_num = src->pg_num;
 442	dest->pg_num_mask = src->pg_num_mask;
 443	ceph_osds_copy(&dest->acting, &src->acting);
 444	ceph_osds_copy(&dest->up, &src->up);
 445	dest->size = src->size;
 446	dest->min_size = src->min_size;
 447	dest->sort_bitwise = src->sort_bitwise;
 448	dest->recovery_deletes = src->recovery_deletes;
 449
 450	dest->flags = src->flags;
 451	dest->used_replica = src->used_replica;
 452	dest->paused = src->paused;
 453
 454	dest->epoch = src->epoch;
 455	dest->last_force_resend = src->last_force_resend;
 456
 457	dest->osd = src->osd;
 458}
 459
 460static void target_destroy(struct ceph_osd_request_target *t)
 461{
 462	ceph_oid_destroy(&t->base_oid);
 463	ceph_oloc_destroy(&t->base_oloc);
 464	ceph_oid_destroy(&t->target_oid);
 465	ceph_oloc_destroy(&t->target_oloc);
 466}
 467
 468/*
 469 * requests
 470 */
 471static void request_release_checks(struct ceph_osd_request *req)
 472{
 473	WARN_ON(!RB_EMPTY_NODE(&req->r_node));
 474	WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
 475	WARN_ON(!list_empty(&req->r_private_item));
 476	WARN_ON(req->r_osd);
 477}
 478
 479static void ceph_osdc_release_request(struct kref *kref)
 480{
 481	struct ceph_osd_request *req = container_of(kref,
 482					    struct ceph_osd_request, r_kref);
 483	unsigned int which;
 484
 485	dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
 486	     req->r_request, req->r_reply);
 487	request_release_checks(req);
 488
 489	if (req->r_request)
 490		ceph_msg_put(req->r_request);
 491	if (req->r_reply)
 492		ceph_msg_put(req->r_reply);
 493
 494	for (which = 0; which < req->r_num_ops; which++)
 495		osd_req_op_data_release(req, which);
 496
 497	target_destroy(&req->r_t);
 498	ceph_put_snap_context(req->r_snapc);
 499
 500	if (req->r_mempool)
 501		mempool_free(req, req->r_osdc->req_mempool);
 502	else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
 503		kmem_cache_free(ceph_osd_request_cache, req);
 504	else
 505		kfree(req);
 506}
 507
 508void ceph_osdc_get_request(struct ceph_osd_request *req)
 509{
 510	dout("%s %p (was %d)\n", __func__, req,
 511	     kref_read(&req->r_kref));
 512	kref_get(&req->r_kref);
 513}
 514EXPORT_SYMBOL(ceph_osdc_get_request);
 515
 516void ceph_osdc_put_request(struct ceph_osd_request *req)
 517{
 518	if (req) {
 519		dout("%s %p (was %d)\n", __func__, req,
 520		     kref_read(&req->r_kref));
 521		kref_put(&req->r_kref, ceph_osdc_release_request);
 522	}
 523}
 524EXPORT_SYMBOL(ceph_osdc_put_request);
 525
 526static void request_init(struct ceph_osd_request *req)
 527{
 528	/* req only, each op is zeroed in osd_req_op_init() */
 529	memset(req, 0, sizeof(*req));
 530
 531	kref_init(&req->r_kref);
 532	init_completion(&req->r_completion);
 533	RB_CLEAR_NODE(&req->r_node);
 534	RB_CLEAR_NODE(&req->r_mc_node);
 535	INIT_LIST_HEAD(&req->r_private_item);
 536
 537	target_init(&req->r_t);
 538}
 539
 540/*
 541 * This is ugly, but it allows us to reuse linger registration and ping
 542 * requests, keeping the structure of the code around send_linger{_ping}()
 543 * reasonable.  Setting up a min_nr=2 mempool for each linger request
 544 * and dealing with copying ops (this blasts req only, watch op remains
 545 * intact) isn't any better.
 546 */
 547static void request_reinit(struct ceph_osd_request *req)
 548{
 549	struct ceph_osd_client *osdc = req->r_osdc;
 550	bool mempool = req->r_mempool;
 551	unsigned int num_ops = req->r_num_ops;
 552	u64 snapid = req->r_snapid;
 553	struct ceph_snap_context *snapc = req->r_snapc;
 554	bool linger = req->r_linger;
 555	struct ceph_msg *request_msg = req->r_request;
 556	struct ceph_msg *reply_msg = req->r_reply;
 557
 558	dout("%s req %p\n", __func__, req);
 559	WARN_ON(kref_read(&req->r_kref) != 1);
 560	request_release_checks(req);
 561
 562	WARN_ON(kref_read(&request_msg->kref) != 1);
 563	WARN_ON(kref_read(&reply_msg->kref) != 1);
 564	target_destroy(&req->r_t);
 565
 566	request_init(req);
 567	req->r_osdc = osdc;
 568	req->r_mempool = mempool;
 569	req->r_num_ops = num_ops;
 570	req->r_snapid = snapid;
 571	req->r_snapc = snapc;
 572	req->r_linger = linger;
 573	req->r_request = request_msg;
 574	req->r_reply = reply_msg;
 575}
 576
 577struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
 578					       struct ceph_snap_context *snapc,
 579					       unsigned int num_ops,
 580					       bool use_mempool,
 581					       gfp_t gfp_flags)
 582{
 583	struct ceph_osd_request *req;
 584
 585	if (use_mempool) {
 586		BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
 587		req = mempool_alloc(osdc->req_mempool, gfp_flags);
 588	} else if (num_ops <= CEPH_OSD_SLAB_OPS) {
 589		req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
 590	} else {
 591		BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
 592		req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
 593	}
 594	if (unlikely(!req))
 595		return NULL;
 596
 597	request_init(req);
 598	req->r_osdc = osdc;
 599	req->r_mempool = use_mempool;
 600	req->r_num_ops = num_ops;
 601	req->r_snapid = CEPH_NOSNAP;
 602	req->r_snapc = ceph_get_snap_context(snapc);
 603
 604	dout("%s req %p\n", __func__, req);
 605	return req;
 606}
 607EXPORT_SYMBOL(ceph_osdc_alloc_request);
 608
 609static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
 610{
 611	return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
 612}
 613
 614static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp,
 615				      int num_request_data_items,
 616				      int num_reply_data_items)
 617{
 618	struct ceph_osd_client *osdc = req->r_osdc;
 619	struct ceph_msg *msg;
 620	int msg_size;
 621
 622	WARN_ON(req->r_request || req->r_reply);
 623	WARN_ON(ceph_oid_empty(&req->r_base_oid));
 624	WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
 625
 626	/* create request message */
 627	msg_size = CEPH_ENCODING_START_BLK_LEN +
 628			CEPH_PGID_ENCODING_LEN + 1; /* spgid */
 629	msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
 630	msg_size += CEPH_ENCODING_START_BLK_LEN +
 631			sizeof(struct ceph_osd_reqid); /* reqid */
 632	msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
 633	msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
 634	msg_size += CEPH_ENCODING_START_BLK_LEN +
 635			ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
 636	msg_size += 4 + req->r_base_oid.name_len; /* oid */
 637	msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
 638	msg_size += 8; /* snapid */
 639	msg_size += 8; /* snap_seq */
 640	msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
 641	msg_size += 4 + 8; /* retry_attempt, features */
 642
 643	if (req->r_mempool)
 644		msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size,
 645				       num_request_data_items);
 646	else
 647		msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size,
 648				    num_request_data_items, gfp, true);
 649	if (!msg)
 650		return -ENOMEM;
 651
 652	memset(msg->front.iov_base, 0, msg->front.iov_len);
 653	req->r_request = msg;
 654
 655	/* create reply message */
 656	msg_size = OSD_OPREPLY_FRONT_LEN;
 657	msg_size += req->r_base_oid.name_len;
 658	msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
 659
 660	if (req->r_mempool)
 661		msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size,
 662				       num_reply_data_items);
 663	else
 664		msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size,
 665				    num_reply_data_items, gfp, true);
 666	if (!msg)
 667		return -ENOMEM;
 668
 669	req->r_reply = msg;
 670
 671	return 0;
 672}
 673
 674static bool osd_req_opcode_valid(u16 opcode)
 675{
 676	switch (opcode) {
 677#define GENERATE_CASE(op, opcode, str)	case CEPH_OSD_OP_##op: return true;
 678__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
 679#undef GENERATE_CASE
 680	default:
 681		return false;
 682	}
 683}
 684
 685static void get_num_data_items(struct ceph_osd_request *req,
 686			       int *num_request_data_items,
 687			       int *num_reply_data_items)
 688{
 689	struct ceph_osd_req_op *op;
 690
 691	*num_request_data_items = 0;
 692	*num_reply_data_items = 0;
 693
 694	for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
 695		switch (op->op) {
 696		/* request */
 697		case CEPH_OSD_OP_WRITE:
 698		case CEPH_OSD_OP_WRITEFULL:
 699		case CEPH_OSD_OP_SETXATTR:
 700		case CEPH_OSD_OP_CMPXATTR:
 701		case CEPH_OSD_OP_NOTIFY_ACK:
 702		case CEPH_OSD_OP_COPY_FROM2:
 703			*num_request_data_items += 1;
 704			break;
 705
 706		/* reply */
 707		case CEPH_OSD_OP_STAT:
 708		case CEPH_OSD_OP_READ:
 
 709		case CEPH_OSD_OP_LIST_WATCHERS:
 710			*num_reply_data_items += 1;
 711			break;
 712
 713		/* both */
 714		case CEPH_OSD_OP_NOTIFY:
 715			*num_request_data_items += 1;
 716			*num_reply_data_items += 1;
 717			break;
 718		case CEPH_OSD_OP_CALL:
 719			*num_request_data_items += 2;
 720			*num_reply_data_items += 1;
 721			break;
 722
 723		default:
 724			WARN_ON(!osd_req_opcode_valid(op->op));
 725			break;
 726		}
 727	}
 728}
 729
 730/*
 731 * oid, oloc and OSD op opcode(s) must be filled in before this function
 732 * is called.
 733 */
 734int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
 735{
 736	int num_request_data_items, num_reply_data_items;
 737
 738	get_num_data_items(req, &num_request_data_items, &num_reply_data_items);
 739	return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items,
 740					  num_reply_data_items);
 741}
 742EXPORT_SYMBOL(ceph_osdc_alloc_messages);
 743
 744/*
 745 * This is an osd op init function for opcodes that have no data or
 746 * other information associated with them.  It also serves as a
 747 * common init routine for all the other init functions, below.
 748 */
 749struct ceph_osd_req_op *
 750osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
 751		 u16 opcode, u32 flags)
 752{
 753	struct ceph_osd_req_op *op;
 754
 755	BUG_ON(which >= osd_req->r_num_ops);
 756	BUG_ON(!osd_req_opcode_valid(opcode));
 757
 758	op = &osd_req->r_ops[which];
 759	memset(op, 0, sizeof (*op));
 760	op->op = opcode;
 761	op->flags = flags;
 762
 763	return op;
 764}
 765EXPORT_SYMBOL(osd_req_op_init);
 766
 767void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
 768				unsigned int which, u16 opcode,
 769				u64 offset, u64 length,
 770				u64 truncate_size, u32 truncate_seq)
 771{
 772	struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
 773						     opcode, 0);
 774	size_t payload_len = 0;
 775
 776	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
 777	       opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
 778	       opcode != CEPH_OSD_OP_TRUNCATE);
 779
 780	op->extent.offset = offset;
 781	op->extent.length = length;
 782	op->extent.truncate_size = truncate_size;
 783	op->extent.truncate_seq = truncate_seq;
 784	if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
 785		payload_len += length;
 786
 787	op->indata_len = payload_len;
 788}
 789EXPORT_SYMBOL(osd_req_op_extent_init);
 790
 791void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
 792				unsigned int which, u64 length)
 793{
 794	struct ceph_osd_req_op *op;
 795	u64 previous;
 796
 797	BUG_ON(which >= osd_req->r_num_ops);
 798	op = &osd_req->r_ops[which];
 799	previous = op->extent.length;
 800
 801	if (length == previous)
 802		return;		/* Nothing to do */
 803	BUG_ON(length > previous);
 804
 805	op->extent.length = length;
 806	if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
 807		op->indata_len -= previous - length;
 808}
 809EXPORT_SYMBOL(osd_req_op_extent_update);
 810
 811void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
 812				unsigned int which, u64 offset_inc)
 813{
 814	struct ceph_osd_req_op *op, *prev_op;
 815
 816	BUG_ON(which + 1 >= osd_req->r_num_ops);
 817
 818	prev_op = &osd_req->r_ops[which];
 819	op = osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
 820	/* dup previous one */
 821	op->indata_len = prev_op->indata_len;
 822	op->outdata_len = prev_op->outdata_len;
 823	op->extent = prev_op->extent;
 824	/* adjust offset */
 825	op->extent.offset += offset_inc;
 826	op->extent.length -= offset_inc;
 827
 828	if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
 829		op->indata_len -= offset_inc;
 830}
 831EXPORT_SYMBOL(osd_req_op_extent_dup_last);
 832
 833int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
 834			const char *class, const char *method)
 835{
 836	struct ceph_osd_req_op *op;
 837	struct ceph_pagelist *pagelist;
 838	size_t payload_len = 0;
 839	size_t size;
 840	int ret;
 841
 842	op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
 843
 844	pagelist = ceph_pagelist_alloc(GFP_NOFS);
 845	if (!pagelist)
 846		return -ENOMEM;
 847
 848	op->cls.class_name = class;
 849	size = strlen(class);
 850	BUG_ON(size > (size_t) U8_MAX);
 851	op->cls.class_len = size;
 852	ret = ceph_pagelist_append(pagelist, class, size);
 853	if (ret)
 854		goto err_pagelist_free;
 855	payload_len += size;
 856
 857	op->cls.method_name = method;
 858	size = strlen(method);
 859	BUG_ON(size > (size_t) U8_MAX);
 860	op->cls.method_len = size;
 861	ret = ceph_pagelist_append(pagelist, method, size);
 862	if (ret)
 863		goto err_pagelist_free;
 864	payload_len += size;
 865
 866	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
 867	op->indata_len = payload_len;
 868	return 0;
 869
 870err_pagelist_free:
 871	ceph_pagelist_release(pagelist);
 872	return ret;
 873}
 874EXPORT_SYMBOL(osd_req_op_cls_init);
 875
 876int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
 877			  u16 opcode, const char *name, const void *value,
 878			  size_t size, u8 cmp_op, u8 cmp_mode)
 879{
 880	struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which,
 881						     opcode, 0);
 882	struct ceph_pagelist *pagelist;
 883	size_t payload_len;
 884	int ret;
 885
 886	BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
 887
 888	pagelist = ceph_pagelist_alloc(GFP_NOFS);
 889	if (!pagelist)
 890		return -ENOMEM;
 891
 892	payload_len = strlen(name);
 893	op->xattr.name_len = payload_len;
 894	ret = ceph_pagelist_append(pagelist, name, payload_len);
 895	if (ret)
 896		goto err_pagelist_free;
 897
 898	op->xattr.value_len = size;
 899	ret = ceph_pagelist_append(pagelist, value, size);
 900	if (ret)
 901		goto err_pagelist_free;
 902	payload_len += size;
 903
 904	op->xattr.cmp_op = cmp_op;
 905	op->xattr.cmp_mode = cmp_mode;
 906
 907	ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
 908	op->indata_len = payload_len;
 909	return 0;
 910
 911err_pagelist_free:
 912	ceph_pagelist_release(pagelist);
 913	return ret;
 914}
 915EXPORT_SYMBOL(osd_req_op_xattr_init);
 916
 917/*
 918 * @watch_opcode: CEPH_OSD_WATCH_OP_*
 919 */
 920static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
 921				  u64 cookie, u8 watch_opcode)
 922{
 923	struct ceph_osd_req_op *op;
 924
 925	op = osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
 926	op->watch.cookie = cookie;
 927	op->watch.op = watch_opcode;
 928	op->watch.gen = 0;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 929}
 930
 931/*
 932 * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_*
 933 */
 934void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
 935				unsigned int which,
 936				u64 expected_object_size,
 937				u64 expected_write_size,
 938				u32 flags)
 939{
 940	struct ceph_osd_req_op *op;
 941
 942	op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_SETALLOCHINT, 0);
 943	op->alloc_hint.expected_object_size = expected_object_size;
 944	op->alloc_hint.expected_write_size = expected_write_size;
 945	op->alloc_hint.flags = flags;
 946
 947	/*
 948	 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
 949	 * not worth a feature bit.  Set FAILOK per-op flag to make
 950	 * sure older osds don't trip over an unsupported opcode.
 951	 */
 952	op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
 953}
 954EXPORT_SYMBOL(osd_req_op_alloc_hint_init);
 955
 956static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
 957				struct ceph_osd_data *osd_data)
 958{
 959	u64 length = ceph_osd_data_length(osd_data);
 960
 961	if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
 962		BUG_ON(length > (u64) SIZE_MAX);
 963		if (length)
 964			ceph_msg_data_add_pages(msg, osd_data->pages,
 965					length, osd_data->alignment, false);
 966	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
 967		BUG_ON(!length);
 968		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
 969#ifdef CONFIG_BLOCK
 970	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
 971		ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
 972#endif
 973	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
 974		ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
 
 
 975	} else {
 976		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
 977	}
 978}
 979
 980static u32 osd_req_encode_op(struct ceph_osd_op *dst,
 981			     const struct ceph_osd_req_op *src)
 982{
 983	switch (src->op) {
 984	case CEPH_OSD_OP_STAT:
 985		break;
 986	case CEPH_OSD_OP_READ:
 
 987	case CEPH_OSD_OP_WRITE:
 988	case CEPH_OSD_OP_WRITEFULL:
 989	case CEPH_OSD_OP_ZERO:
 990	case CEPH_OSD_OP_TRUNCATE:
 991		dst->extent.offset = cpu_to_le64(src->extent.offset);
 992		dst->extent.length = cpu_to_le64(src->extent.length);
 993		dst->extent.truncate_size =
 994			cpu_to_le64(src->extent.truncate_size);
 995		dst->extent.truncate_seq =
 996			cpu_to_le32(src->extent.truncate_seq);
 997		break;
 998	case CEPH_OSD_OP_CALL:
 999		dst->cls.class_len = src->cls.class_len;
1000		dst->cls.method_len = src->cls.method_len;
1001		dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
1002		break;
1003	case CEPH_OSD_OP_WATCH:
1004		dst->watch.cookie = cpu_to_le64(src->watch.cookie);
1005		dst->watch.ver = cpu_to_le64(0);
1006		dst->watch.op = src->watch.op;
1007		dst->watch.gen = cpu_to_le32(src->watch.gen);
1008		break;
1009	case CEPH_OSD_OP_NOTIFY_ACK:
1010		break;
1011	case CEPH_OSD_OP_NOTIFY:
1012		dst->notify.cookie = cpu_to_le64(src->notify.cookie);
1013		break;
1014	case CEPH_OSD_OP_LIST_WATCHERS:
1015		break;
1016	case CEPH_OSD_OP_SETALLOCHINT:
1017		dst->alloc_hint.expected_object_size =
1018		    cpu_to_le64(src->alloc_hint.expected_object_size);
1019		dst->alloc_hint.expected_write_size =
1020		    cpu_to_le64(src->alloc_hint.expected_write_size);
1021		dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags);
1022		break;
1023	case CEPH_OSD_OP_SETXATTR:
1024	case CEPH_OSD_OP_CMPXATTR:
1025		dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
1026		dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
1027		dst->xattr.cmp_op = src->xattr.cmp_op;
1028		dst->xattr.cmp_mode = src->xattr.cmp_mode;
1029		break;
1030	case CEPH_OSD_OP_CREATE:
1031	case CEPH_OSD_OP_DELETE:
1032		break;
1033	case CEPH_OSD_OP_COPY_FROM2:
1034		dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid);
1035		dst->copy_from.src_version =
1036			cpu_to_le64(src->copy_from.src_version);
1037		dst->copy_from.flags = src->copy_from.flags;
1038		dst->copy_from.src_fadvise_flags =
1039			cpu_to_le32(src->copy_from.src_fadvise_flags);
1040		break;
 
 
 
 
1041	default:
1042		pr_err("unsupported osd opcode %s\n",
1043			ceph_osd_op_name(src->op));
1044		WARN_ON(1);
1045
1046		return 0;
1047	}
1048
1049	dst->op = cpu_to_le16(src->op);
1050	dst->flags = cpu_to_le32(src->flags);
1051	dst->payload_len = cpu_to_le32(src->indata_len);
1052
1053	return src->indata_len;
1054}
1055
1056/*
1057 * build new request AND message, calculate layout, and adjust file
1058 * extent as needed.
1059 *
1060 * if the file was recently truncated, we include information about its
1061 * old and new size so that the object can be updated appropriately.  (we
1062 * avoid synchronously deleting truncated objects because it's slow.)
1063 */
1064struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
1065					       struct ceph_file_layout *layout,
1066					       struct ceph_vino vino,
1067					       u64 off, u64 *plen,
1068					       unsigned int which, int num_ops,
1069					       int opcode, int flags,
1070					       struct ceph_snap_context *snapc,
1071					       u32 truncate_seq,
1072					       u64 truncate_size,
1073					       bool use_mempool)
1074{
1075	struct ceph_osd_request *req;
1076	u64 objnum = 0;
1077	u64 objoff = 0;
1078	u64 objlen = 0;
1079	int r;
1080
1081	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
1082	       opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
1083	       opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
 
1084
1085	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
1086					GFP_NOFS);
1087	if (!req) {
1088		r = -ENOMEM;
1089		goto fail;
1090	}
1091
1092	/* calculate max write size */
1093	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
1094	if (r)
1095		goto fail;
1096
1097	if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
1098		osd_req_op_init(req, which, opcode, 0);
1099	} else {
1100		u32 object_size = layout->object_size;
1101		u32 object_base = off - objoff;
1102		if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
1103			if (truncate_size <= object_base) {
1104				truncate_size = 0;
1105			} else {
1106				truncate_size -= object_base;
1107				if (truncate_size > object_size)
1108					truncate_size = object_size;
1109			}
1110		}
1111		osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1112				       truncate_size, truncate_seq);
1113	}
1114
1115	req->r_base_oloc.pool = layout->pool_id;
1116	req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1117	ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1118	req->r_flags = flags | osdc->client->options->read_from_replica;
1119
1120	req->r_snapid = vino.snap;
1121	if (flags & CEPH_OSD_FLAG_WRITE)
1122		req->r_data_offset = off;
1123
1124	if (num_ops > 1)
 
 
1125		/*
1126		 * This is a special case for ceph_writepages_start(), but it
1127		 * also covers ceph_uninline_data().  If more multi-op request
1128		 * use cases emerge, we will need a separate helper.
1129		 */
1130		r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
1131	else
 
 
 
 
 
 
 
 
 
 
 
 
1132		r = ceph_osdc_alloc_messages(req, GFP_NOFS);
 
1133	if (r)
1134		goto fail;
1135
1136	return req;
1137
1138fail:
1139	ceph_osdc_put_request(req);
1140	return ERR_PTR(r);
1141}
1142EXPORT_SYMBOL(ceph_osdc_new_request);
1143
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1144/*
1145 * We keep osd requests in an rbtree, sorted by ->r_tid.
1146 */
1147DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
1148DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
1149
1150/*
1151 * Call @fn on each OSD request as long as @fn returns 0.
1152 */
1153static void for_each_request(struct ceph_osd_client *osdc,
1154			int (*fn)(struct ceph_osd_request *req, void *arg),
1155			void *arg)
1156{
1157	struct rb_node *n, *p;
1158
1159	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
1160		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
1161
1162		for (p = rb_first(&osd->o_requests); p; ) {
1163			struct ceph_osd_request *req =
1164			    rb_entry(p, struct ceph_osd_request, r_node);
1165
1166			p = rb_next(p);
1167			if (fn(req, arg))
1168				return;
1169		}
1170	}
1171
1172	for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
1173		struct ceph_osd_request *req =
1174		    rb_entry(p, struct ceph_osd_request, r_node);
1175
1176		p = rb_next(p);
1177		if (fn(req, arg))
1178			return;
1179	}
1180}
1181
1182static bool osd_homeless(struct ceph_osd *osd)
1183{
1184	return osd->o_osd == CEPH_HOMELESS_OSD;
1185}
1186
1187static bool osd_registered(struct ceph_osd *osd)
1188{
1189	verify_osdc_locked(osd->o_osdc);
1190
1191	return !RB_EMPTY_NODE(&osd->o_node);
1192}
1193
1194/*
1195 * Assumes @osd is zero-initialized.
1196 */
1197static void osd_init(struct ceph_osd *osd)
1198{
1199	refcount_set(&osd->o_ref, 1);
1200	RB_CLEAR_NODE(&osd->o_node);
 
1201	osd->o_requests = RB_ROOT;
1202	osd->o_linger_requests = RB_ROOT;
1203	osd->o_backoff_mappings = RB_ROOT;
1204	osd->o_backoffs_by_id = RB_ROOT;
1205	INIT_LIST_HEAD(&osd->o_osd_lru);
1206	INIT_LIST_HEAD(&osd->o_keepalive_item);
1207	osd->o_incarnation = 1;
1208	mutex_init(&osd->lock);
1209}
1210
 
 
 
 
 
 
 
1211static void osd_cleanup(struct ceph_osd *osd)
1212{
1213	WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1214	WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1215	WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1216	WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
1217	WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1218	WARN_ON(!list_empty(&osd->o_osd_lru));
1219	WARN_ON(!list_empty(&osd->o_keepalive_item));
1220
 
 
1221	if (osd->o_auth.authorizer) {
1222		WARN_ON(osd_homeless(osd));
1223		ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
1224	}
1225}
1226
1227/*
1228 * Track open sessions with osds.
1229 */
1230static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
1231{
1232	struct ceph_osd *osd;
1233
1234	WARN_ON(onum == CEPH_HOMELESS_OSD);
1235
1236	osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1237	osd_init(osd);
1238	osd->o_osdc = osdc;
1239	osd->o_osd = onum;
 
 
 
1240
1241	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1242
1243	return osd;
1244}
1245
1246static struct ceph_osd *get_osd(struct ceph_osd *osd)
1247{
1248	if (refcount_inc_not_zero(&osd->o_ref)) {
1249		dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
1250		     refcount_read(&osd->o_ref));
1251		return osd;
1252	} else {
1253		dout("get_osd %p FAIL\n", osd);
1254		return NULL;
1255	}
1256}
1257
1258static void put_osd(struct ceph_osd *osd)
1259{
1260	dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
1261	     refcount_read(&osd->o_ref) - 1);
1262	if (refcount_dec_and_test(&osd->o_ref)) {
1263		osd_cleanup(osd);
1264		kfree(osd);
1265	}
1266}
1267
1268DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
1269
1270static void __move_osd_to_lru(struct ceph_osd *osd)
1271{
1272	struct ceph_osd_client *osdc = osd->o_osdc;
1273
1274	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1275	BUG_ON(!list_empty(&osd->o_osd_lru));
1276
1277	spin_lock(&osdc->osd_lru_lock);
1278	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1279	spin_unlock(&osdc->osd_lru_lock);
1280
1281	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1282}
1283
1284static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1285{
1286	if (RB_EMPTY_ROOT(&osd->o_requests) &&
1287	    RB_EMPTY_ROOT(&osd->o_linger_requests))
1288		__move_osd_to_lru(osd);
1289}
1290
1291static void __remove_osd_from_lru(struct ceph_osd *osd)
1292{
1293	struct ceph_osd_client *osdc = osd->o_osdc;
1294
1295	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1296
1297	spin_lock(&osdc->osd_lru_lock);
1298	if (!list_empty(&osd->o_osd_lru))
1299		list_del_init(&osd->o_osd_lru);
1300	spin_unlock(&osdc->osd_lru_lock);
1301}
1302
1303/*
1304 * Close the connection and assign any leftover requests to the
1305 * homeless session.
1306 */
1307static void close_osd(struct ceph_osd *osd)
1308{
1309	struct ceph_osd_client *osdc = osd->o_osdc;
1310	struct rb_node *n;
1311
1312	verify_osdc_wrlocked(osdc);
1313	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1314
1315	ceph_con_close(&osd->o_con);
1316
1317	for (n = rb_first(&osd->o_requests); n; ) {
1318		struct ceph_osd_request *req =
1319		    rb_entry(n, struct ceph_osd_request, r_node);
1320
1321		n = rb_next(n); /* unlink_request() */
1322
1323		dout(" reassigning req %p tid %llu\n", req, req->r_tid);
1324		unlink_request(osd, req);
1325		link_request(&osdc->homeless_osd, req);
1326	}
1327	for (n = rb_first(&osd->o_linger_requests); n; ) {
1328		struct ceph_osd_linger_request *lreq =
1329		    rb_entry(n, struct ceph_osd_linger_request, node);
1330
1331		n = rb_next(n); /* unlink_linger() */
1332
1333		dout(" reassigning lreq %p linger_id %llu\n", lreq,
1334		     lreq->linger_id);
1335		unlink_linger(osd, lreq);
1336		link_linger(&osdc->homeless_osd, lreq);
1337	}
1338	clear_backoffs(osd);
1339
1340	__remove_osd_from_lru(osd);
1341	erase_osd(&osdc->osds, osd);
1342	put_osd(osd);
1343}
1344
1345/*
1346 * reset osd connect
1347 */
1348static int reopen_osd(struct ceph_osd *osd)
1349{
1350	struct ceph_entity_addr *peer_addr;
1351
1352	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1353
1354	if (RB_EMPTY_ROOT(&osd->o_requests) &&
1355	    RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1356		close_osd(osd);
1357		return -ENODEV;
1358	}
1359
1360	peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
1361	if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
1362			!ceph_con_opened(&osd->o_con)) {
1363		struct rb_node *n;
1364
1365		dout("osd addr hasn't changed and connection never opened, "
1366		     "letting msgr retry\n");
1367		/* touch each r_stamp for handle_timeout()'s benfit */
1368		for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
1369			struct ceph_osd_request *req =
1370			    rb_entry(n, struct ceph_osd_request, r_node);
1371			req->r_stamp = jiffies;
1372		}
1373
1374		return -EAGAIN;
1375	}
1376
1377	ceph_con_close(&osd->o_con);
1378	ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
1379	osd->o_incarnation++;
1380
1381	return 0;
1382}
1383
1384static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
1385					  bool wrlocked)
1386{
1387	struct ceph_osd *osd;
1388
1389	if (wrlocked)
1390		verify_osdc_wrlocked(osdc);
1391	else
1392		verify_osdc_locked(osdc);
1393
1394	if (o != CEPH_HOMELESS_OSD)
1395		osd = lookup_osd(&osdc->osds, o);
1396	else
1397		osd = &osdc->homeless_osd;
1398	if (!osd) {
1399		if (!wrlocked)
1400			return ERR_PTR(-EAGAIN);
1401
1402		osd = create_osd(osdc, o);
1403		insert_osd(&osdc->osds, osd);
1404		ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
1405			      &osdc->osdmap->osd_addr[osd->o_osd]);
1406	}
1407
1408	dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
1409	return osd;
1410}
1411
1412/*
1413 * Create request <-> OSD session relation.
1414 *
1415 * @req has to be assigned a tid, @osd may be homeless.
1416 */
1417static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1418{
1419	verify_osd_locked(osd);
1420	WARN_ON(!req->r_tid || req->r_osd);
1421	dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1422	     req, req->r_tid);
1423
1424	if (!osd_homeless(osd))
1425		__remove_osd_from_lru(osd);
1426	else
1427		atomic_inc(&osd->o_osdc->num_homeless);
1428
1429	get_osd(osd);
 
1430	insert_request(&osd->o_requests, req);
 
1431	req->r_osd = osd;
1432}
1433
1434static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
1435{
1436	verify_osd_locked(osd);
1437	WARN_ON(req->r_osd != osd);
1438	dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
1439	     req, req->r_tid);
1440
1441	req->r_osd = NULL;
 
1442	erase_request(&osd->o_requests, req);
 
1443	put_osd(osd);
1444
1445	if (!osd_homeless(osd))
1446		maybe_move_osd_to_lru(osd);
1447	else
1448		atomic_dec(&osd->o_osdc->num_homeless);
1449}
1450
1451static bool __pool_full(struct ceph_pg_pool_info *pi)
1452{
1453	return pi->flags & CEPH_POOL_FLAG_FULL;
1454}
1455
1456static bool have_pool_full(struct ceph_osd_client *osdc)
1457{
1458	struct rb_node *n;
1459
1460	for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
1461		struct ceph_pg_pool_info *pi =
1462		    rb_entry(n, struct ceph_pg_pool_info, node);
1463
1464		if (__pool_full(pi))
1465			return true;
1466	}
1467
1468	return false;
1469}
1470
1471static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
1472{
1473	struct ceph_pg_pool_info *pi;
1474
1475	pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
1476	if (!pi)
1477		return false;
1478
1479	return __pool_full(pi);
1480}
1481
1482/*
1483 * Returns whether a request should be blocked from being sent
1484 * based on the current osdmap and osd_client settings.
1485 */
1486static bool target_should_be_paused(struct ceph_osd_client *osdc,
1487				    const struct ceph_osd_request_target *t,
1488				    struct ceph_pg_pool_info *pi)
1489{
1490	bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
1491	bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
1492		       ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1493		       __pool_full(pi);
1494
1495	WARN_ON(pi->id != t->target_oloc.pool);
1496	return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
1497	       ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
1498	       (osdc->osdmap->epoch < osdc->epoch_barrier);
1499}
1500
1501static int pick_random_replica(const struct ceph_osds *acting)
1502{
1503	int i = prandom_u32() % acting->size;
1504
1505	dout("%s picked osd%d, primary osd%d\n", __func__,
1506	     acting->osds[i], acting->primary);
1507	return i;
1508}
1509
1510/*
1511 * Picks the closest replica based on client's location given by
1512 * crush_location option.  Prefers the primary if the locality is
1513 * the same.
1514 */
1515static int pick_closest_replica(struct ceph_osd_client *osdc,
1516				const struct ceph_osds *acting)
1517{
1518	struct ceph_options *opt = osdc->client->options;
1519	int best_i, best_locality;
1520	int i = 0, locality;
1521
1522	do {
1523		locality = ceph_get_crush_locality(osdc->osdmap,
1524						   acting->osds[i],
1525						   &opt->crush_locs);
1526		if (i == 0 ||
1527		    (locality >= 0 && best_locality < 0) ||
1528		    (locality >= 0 && best_locality >= 0 &&
1529		     locality < best_locality)) {
1530			best_i = i;
1531			best_locality = locality;
1532		}
1533	} while (++i < acting->size);
1534
1535	dout("%s picked osd%d with locality %d, primary osd%d\n", __func__,
1536	     acting->osds[best_i], best_locality, acting->primary);
1537	return best_i;
1538}
1539
1540enum calc_target_result {
1541	CALC_TARGET_NO_ACTION = 0,
1542	CALC_TARGET_NEED_RESEND,
1543	CALC_TARGET_POOL_DNE,
1544};
1545
1546static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
1547					   struct ceph_osd_request_target *t,
1548					   bool any_change)
1549{
1550	struct ceph_pg_pool_info *pi;
1551	struct ceph_pg pgid, last_pgid;
1552	struct ceph_osds up, acting;
1553	bool is_read = t->flags & CEPH_OSD_FLAG_READ;
1554	bool is_write = t->flags & CEPH_OSD_FLAG_WRITE;
1555	bool force_resend = false;
1556	bool unpaused = false;
1557	bool legacy_change = false;
1558	bool split = false;
1559	bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1560	bool recovery_deletes = ceph_osdmap_flag(osdc,
1561						 CEPH_OSDMAP_RECOVERY_DELETES);
1562	enum calc_target_result ct_res;
1563
1564	t->epoch = osdc->osdmap->epoch;
1565	pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
1566	if (!pi) {
1567		t->osd = CEPH_HOMELESS_OSD;
1568		ct_res = CALC_TARGET_POOL_DNE;
1569		goto out;
1570	}
1571
1572	if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1573		if (t->last_force_resend < pi->last_force_request_resend) {
1574			t->last_force_resend = pi->last_force_request_resend;
1575			force_resend = true;
1576		} else if (t->last_force_resend == 0) {
1577			force_resend = true;
1578		}
1579	}
1580
1581	/* apply tiering */
1582	ceph_oid_copy(&t->target_oid, &t->base_oid);
1583	ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
1584	if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1585		if (is_read && pi->read_tier >= 0)
1586			t->target_oloc.pool = pi->read_tier;
1587		if (is_write && pi->write_tier >= 0)
1588			t->target_oloc.pool = pi->write_tier;
1589
1590		pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
1591		if (!pi) {
1592			t->osd = CEPH_HOMELESS_OSD;
1593			ct_res = CALC_TARGET_POOL_DNE;
1594			goto out;
1595		}
1596	}
1597
1598	__ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
1599	last_pgid.pool = pgid.pool;
1600	last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
1601
1602	ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1603	if (any_change &&
1604	    ceph_is_new_interval(&t->acting,
1605				 &acting,
1606				 &t->up,
1607				 &up,
1608				 t->size,
1609				 pi->size,
1610				 t->min_size,
1611				 pi->min_size,
1612				 t->pg_num,
1613				 pi->pg_num,
1614				 t->sort_bitwise,
1615				 sort_bitwise,
1616				 t->recovery_deletes,
1617				 recovery_deletes,
1618				 &last_pgid))
1619		force_resend = true;
1620
1621	if (t->paused && !target_should_be_paused(osdc, t, pi)) {
1622		t->paused = false;
1623		unpaused = true;
1624	}
1625	legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
1626			ceph_osds_changed(&t->acting, &acting,
1627					  t->used_replica || any_change);
1628	if (t->pg_num)
1629		split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1630
1631	if (legacy_change || force_resend || split) {
1632		t->pgid = pgid; /* struct */
1633		ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1634		ceph_osds_copy(&t->acting, &acting);
1635		ceph_osds_copy(&t->up, &up);
1636		t->size = pi->size;
1637		t->min_size = pi->min_size;
1638		t->pg_num = pi->pg_num;
1639		t->pg_num_mask = pi->pg_num_mask;
1640		t->sort_bitwise = sort_bitwise;
1641		t->recovery_deletes = recovery_deletes;
1642
1643		if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS |
1644				 CEPH_OSD_FLAG_LOCALIZE_READS)) &&
1645		    !is_write && pi->type == CEPH_POOL_TYPE_REP &&
1646		    acting.size > 1) {
1647			int pos;
1648
1649			WARN_ON(!is_read || acting.osds[0] != acting.primary);
1650			if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) {
1651				pos = pick_random_replica(&acting);
1652			} else {
1653				pos = pick_closest_replica(osdc, &acting);
1654			}
1655			t->osd = acting.osds[pos];
1656			t->used_replica = pos > 0;
1657		} else {
1658			t->osd = acting.primary;
1659			t->used_replica = false;
1660		}
1661	}
1662
1663	if (unpaused || legacy_change || force_resend || split)
1664		ct_res = CALC_TARGET_NEED_RESEND;
1665	else
1666		ct_res = CALC_TARGET_NO_ACTION;
1667
1668out:
1669	dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused,
1670	     legacy_change, force_resend, split, ct_res, t->osd);
1671	return ct_res;
1672}
1673
1674static struct ceph_spg_mapping *alloc_spg_mapping(void)
1675{
1676	struct ceph_spg_mapping *spg;
1677
1678	spg = kmalloc(sizeof(*spg), GFP_NOIO);
1679	if (!spg)
1680		return NULL;
1681
1682	RB_CLEAR_NODE(&spg->node);
1683	spg->backoffs = RB_ROOT;
1684	return spg;
1685}
1686
1687static void free_spg_mapping(struct ceph_spg_mapping *spg)
1688{
1689	WARN_ON(!RB_EMPTY_NODE(&spg->node));
1690	WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));
1691
1692	kfree(spg);
1693}
1694
1695/*
1696 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
1697 * ceph_pg_mapping.  Used to track OSD backoffs -- a backoff [range] is
1698 * defined only within a specific spgid; it does not pass anything to
1699 * children on split, or to another primary.
1700 */
1701DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
1702		 RB_BYPTR, const struct ceph_spg *, node)
1703
1704static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
1705{
1706	return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
1707}
1708
1709static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
1710				   void **pkey, size_t *pkey_len)
1711{
1712	if (hoid->key_len) {
1713		*pkey = hoid->key;
1714		*pkey_len = hoid->key_len;
1715	} else {
1716		*pkey = hoid->oid;
1717		*pkey_len = hoid->oid_len;
1718	}
1719}
1720
1721static int compare_names(const void *name1, size_t name1_len,
1722			 const void *name2, size_t name2_len)
1723{
1724	int ret;
1725
1726	ret = memcmp(name1, name2, min(name1_len, name2_len));
1727	if (!ret) {
1728		if (name1_len < name2_len)
1729			ret = -1;
1730		else if (name1_len > name2_len)
1731			ret = 1;
1732	}
1733	return ret;
1734}
1735
1736static int hoid_compare(const struct ceph_hobject_id *lhs,
1737			const struct ceph_hobject_id *rhs)
1738{
1739	void *effective_key1, *effective_key2;
1740	size_t effective_key1_len, effective_key2_len;
1741	int ret;
1742
1743	if (lhs->is_max < rhs->is_max)
1744		return -1;
1745	if (lhs->is_max > rhs->is_max)
1746		return 1;
1747
1748	if (lhs->pool < rhs->pool)
1749		return -1;
1750	if (lhs->pool > rhs->pool)
1751		return 1;
1752
1753	if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
1754		return -1;
1755	if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
1756		return 1;
1757
1758	ret = compare_names(lhs->nspace, lhs->nspace_len,
1759			    rhs->nspace, rhs->nspace_len);
1760	if (ret)
1761		return ret;
1762
1763	hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
1764	hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
1765	ret = compare_names(effective_key1, effective_key1_len,
1766			    effective_key2, effective_key2_len);
1767	if (ret)
1768		return ret;
1769
1770	ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
1771	if (ret)
1772		return ret;
1773
1774	if (lhs->snapid < rhs->snapid)
1775		return -1;
1776	if (lhs->snapid > rhs->snapid)
1777		return 1;
1778
1779	return 0;
1780}
1781
1782/*
1783 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
1784 * compat stuff here.
1785 *
1786 * Assumes @hoid is zero-initialized.
1787 */
1788static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
1789{
1790	u8 struct_v;
1791	u32 struct_len;
1792	int ret;
1793
1794	ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
1795				  &struct_len);
1796	if (ret)
1797		return ret;
1798
1799	if (struct_v < 4) {
1800		pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
1801		goto e_inval;
1802	}
1803
1804	hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
1805						GFP_NOIO);
1806	if (IS_ERR(hoid->key)) {
1807		ret = PTR_ERR(hoid->key);
1808		hoid->key = NULL;
1809		return ret;
1810	}
1811
1812	hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
1813						GFP_NOIO);
1814	if (IS_ERR(hoid->oid)) {
1815		ret = PTR_ERR(hoid->oid);
1816		hoid->oid = NULL;
1817		return ret;
1818	}
1819
1820	ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
1821	ceph_decode_32_safe(p, end, hoid->hash, e_inval);
1822	ceph_decode_8_safe(p, end, hoid->is_max, e_inval);
1823
1824	hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
1825						   GFP_NOIO);
1826	if (IS_ERR(hoid->nspace)) {
1827		ret = PTR_ERR(hoid->nspace);
1828		hoid->nspace = NULL;
1829		return ret;
1830	}
1831
1832	ceph_decode_64_safe(p, end, hoid->pool, e_inval);
1833
1834	ceph_hoid_build_hash_cache(hoid);
1835	return 0;
1836
1837e_inval:
1838	return -EINVAL;
1839}
1840
1841static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
1842{
1843	return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
1844	       4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
1845}
1846
1847static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
1848{
1849	ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
1850	ceph_encode_string(p, end, hoid->key, hoid->key_len);
1851	ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
1852	ceph_encode_64(p, hoid->snapid);
1853	ceph_encode_32(p, hoid->hash);
1854	ceph_encode_8(p, hoid->is_max);
1855	ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
1856	ceph_encode_64(p, hoid->pool);
1857}
1858
1859static void free_hoid(struct ceph_hobject_id *hoid)
1860{
1861	if (hoid) {
1862		kfree(hoid->key);
1863		kfree(hoid->oid);
1864		kfree(hoid->nspace);
1865		kfree(hoid);
1866	}
1867}
1868
1869static struct ceph_osd_backoff *alloc_backoff(void)
1870{
1871	struct ceph_osd_backoff *backoff;
1872
1873	backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
1874	if (!backoff)
1875		return NULL;
1876
1877	RB_CLEAR_NODE(&backoff->spg_node);
1878	RB_CLEAR_NODE(&backoff->id_node);
1879	return backoff;
1880}
1881
1882static void free_backoff(struct ceph_osd_backoff *backoff)
1883{
1884	WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
1885	WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));
1886
1887	free_hoid(backoff->begin);
1888	free_hoid(backoff->end);
1889	kfree(backoff);
1890}
1891
1892/*
1893 * Within a specific spgid, backoffs are managed by ->begin hoid.
1894 */
1895DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
1896			RB_BYVAL, spg_node);
1897
1898static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
1899					    const struct ceph_hobject_id *hoid)
1900{
1901	struct rb_node *n = root->rb_node;
1902
1903	while (n) {
1904		struct ceph_osd_backoff *cur =
1905		    rb_entry(n, struct ceph_osd_backoff, spg_node);
1906		int cmp;
1907
1908		cmp = hoid_compare(hoid, cur->begin);
1909		if (cmp < 0) {
1910			n = n->rb_left;
1911		} else if (cmp > 0) {
1912			if (hoid_compare(hoid, cur->end) < 0)
1913				return cur;
1914
1915			n = n->rb_right;
1916		} else {
1917			return cur;
1918		}
1919	}
1920
1921	return NULL;
1922}
1923
1924/*
1925 * Each backoff has a unique id within its OSD session.
1926 */
1927DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)
1928
1929static void clear_backoffs(struct ceph_osd *osd)
1930{
1931	while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
1932		struct ceph_spg_mapping *spg =
1933		    rb_entry(rb_first(&osd->o_backoff_mappings),
1934			     struct ceph_spg_mapping, node);
1935
1936		while (!RB_EMPTY_ROOT(&spg->backoffs)) {
1937			struct ceph_osd_backoff *backoff =
1938			    rb_entry(rb_first(&spg->backoffs),
1939				     struct ceph_osd_backoff, spg_node);
1940
1941			erase_backoff(&spg->backoffs, backoff);
1942			erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
1943			free_backoff(backoff);
1944		}
1945		erase_spg_mapping(&osd->o_backoff_mappings, spg);
1946		free_spg_mapping(spg);
1947	}
1948}
1949
1950/*
1951 * Set up a temporary, non-owning view into @t.
1952 */
1953static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
1954				  const struct ceph_osd_request_target *t)
1955{
1956	hoid->key = NULL;
1957	hoid->key_len = 0;
1958	hoid->oid = t->target_oid.name;
1959	hoid->oid_len = t->target_oid.name_len;
1960	hoid->snapid = CEPH_NOSNAP;
1961	hoid->hash = t->pgid.seed;
1962	hoid->is_max = false;
1963	if (t->target_oloc.pool_ns) {
1964		hoid->nspace = t->target_oloc.pool_ns->str;
1965		hoid->nspace_len = t->target_oloc.pool_ns->len;
1966	} else {
1967		hoid->nspace = NULL;
1968		hoid->nspace_len = 0;
1969	}
1970	hoid->pool = t->target_oloc.pool;
1971	ceph_hoid_build_hash_cache(hoid);
1972}
1973
1974static bool should_plug_request(struct ceph_osd_request *req)
1975{
1976	struct ceph_osd *osd = req->r_osd;
1977	struct ceph_spg_mapping *spg;
1978	struct ceph_osd_backoff *backoff;
1979	struct ceph_hobject_id hoid;
1980
1981	spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
1982	if (!spg)
1983		return false;
1984
1985	hoid_fill_from_target(&hoid, &req->r_t);
1986	backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
1987	if (!backoff)
1988		return false;
1989
1990	dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
1991	     __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
1992	     backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
1993	return true;
1994}
1995
1996/*
1997 * Keep get_num_data_items() in sync with this function.
1998 */
1999static void setup_request_data(struct ceph_osd_request *req)
2000{
2001	struct ceph_msg *request_msg = req->r_request;
2002	struct ceph_msg *reply_msg = req->r_reply;
2003	struct ceph_osd_req_op *op;
2004
2005	if (req->r_request->num_data_items || req->r_reply->num_data_items)
2006		return;
2007
2008	WARN_ON(request_msg->data_length || reply_msg->data_length);
2009	for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) {
2010		switch (op->op) {
2011		/* request */
2012		case CEPH_OSD_OP_WRITE:
2013		case CEPH_OSD_OP_WRITEFULL:
2014			WARN_ON(op->indata_len != op->extent.length);
2015			ceph_osdc_msg_data_add(request_msg,
2016					       &op->extent.osd_data);
2017			break;
2018		case CEPH_OSD_OP_SETXATTR:
2019		case CEPH_OSD_OP_CMPXATTR:
2020			WARN_ON(op->indata_len != op->xattr.name_len +
2021						  op->xattr.value_len);
2022			ceph_osdc_msg_data_add(request_msg,
2023					       &op->xattr.osd_data);
2024			break;
2025		case CEPH_OSD_OP_NOTIFY_ACK:
2026			ceph_osdc_msg_data_add(request_msg,
2027					       &op->notify_ack.request_data);
2028			break;
2029		case CEPH_OSD_OP_COPY_FROM2:
2030			ceph_osdc_msg_data_add(request_msg,
2031					       &op->copy_from.osd_data);
2032			break;
2033
2034		/* reply */
2035		case CEPH_OSD_OP_STAT:
2036			ceph_osdc_msg_data_add(reply_msg,
2037					       &op->raw_data_in);
2038			break;
2039		case CEPH_OSD_OP_READ:
 
2040			ceph_osdc_msg_data_add(reply_msg,
2041					       &op->extent.osd_data);
2042			break;
2043		case CEPH_OSD_OP_LIST_WATCHERS:
2044			ceph_osdc_msg_data_add(reply_msg,
2045					       &op->list_watchers.response_data);
2046			break;
2047
2048		/* both */
2049		case CEPH_OSD_OP_CALL:
2050			WARN_ON(op->indata_len != op->cls.class_len +
2051						  op->cls.method_len +
2052						  op->cls.indata_len);
2053			ceph_osdc_msg_data_add(request_msg,
2054					       &op->cls.request_info);
2055			/* optional, can be NONE */
2056			ceph_osdc_msg_data_add(request_msg,
2057					       &op->cls.request_data);
2058			/* optional, can be NONE */
2059			ceph_osdc_msg_data_add(reply_msg,
2060					       &op->cls.response_data);
2061			break;
2062		case CEPH_OSD_OP_NOTIFY:
2063			ceph_osdc_msg_data_add(request_msg,
2064					       &op->notify.request_data);
2065			ceph_osdc_msg_data_add(reply_msg,
2066					       &op->notify.response_data);
2067			break;
2068		}
2069	}
2070}
2071
2072static void encode_pgid(void **p, const struct ceph_pg *pgid)
2073{
2074	ceph_encode_8(p, 1);
2075	ceph_encode_64(p, pgid->pool);
2076	ceph_encode_32(p, pgid->seed);
2077	ceph_encode_32(p, -1); /* preferred */
2078}
2079
2080static void encode_spgid(void **p, const struct ceph_spg *spgid)
2081{
2082	ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
2083	encode_pgid(p, &spgid->pgid);
2084	ceph_encode_8(p, spgid->shard);
2085}
2086
2087static void encode_oloc(void **p, void *end,
2088			const struct ceph_object_locator *oloc)
2089{
2090	ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
2091	ceph_encode_64(p, oloc->pool);
2092	ceph_encode_32(p, -1); /* preferred */
2093	ceph_encode_32(p, 0);  /* key len */
2094	if (oloc->pool_ns)
2095		ceph_encode_string(p, end, oloc->pool_ns->str,
2096				   oloc->pool_ns->len);
2097	else
2098		ceph_encode_32(p, 0);
2099}
2100
2101static void encode_request_partial(struct ceph_osd_request *req,
2102				   struct ceph_msg *msg)
2103{
2104	void *p = msg->front.iov_base;
2105	void *const end = p + msg->front_alloc_len;
2106	u32 data_len = 0;
2107	int i;
2108
2109	if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
2110		/* snapshots aren't writeable */
2111		WARN_ON(req->r_snapid != CEPH_NOSNAP);
2112	} else {
2113		WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
2114			req->r_data_offset || req->r_snapc);
2115	}
2116
2117	setup_request_data(req);
2118
2119	encode_spgid(&p, &req->r_t.spgid); /* actual spg */
2120	ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
2121	ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
2122	ceph_encode_32(&p, req->r_flags);
2123
2124	/* reqid */
2125	ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
2126	memset(p, 0, sizeof(struct ceph_osd_reqid));
2127	p += sizeof(struct ceph_osd_reqid);
2128
2129	/* trace */
2130	memset(p, 0, sizeof(struct ceph_blkin_trace_info));
2131	p += sizeof(struct ceph_blkin_trace_info);
2132
2133	ceph_encode_32(&p, 0); /* client_inc, always 0 */
2134	ceph_encode_timespec64(p, &req->r_mtime);
2135	p += sizeof(struct ceph_timespec);
2136
2137	encode_oloc(&p, end, &req->r_t.target_oloc);
2138	ceph_encode_string(&p, end, req->r_t.target_oid.name,
2139			   req->r_t.target_oid.name_len);
2140
2141	/* ops, can imply data */
2142	ceph_encode_16(&p, req->r_num_ops);
2143	for (i = 0; i < req->r_num_ops; i++) {
2144		data_len += osd_req_encode_op(p, &req->r_ops[i]);
2145		p += sizeof(struct ceph_osd_op);
2146	}
2147
2148	ceph_encode_64(&p, req->r_snapid); /* snapid */
2149	if (req->r_snapc) {
2150		ceph_encode_64(&p, req->r_snapc->seq);
2151		ceph_encode_32(&p, req->r_snapc->num_snaps);
2152		for (i = 0; i < req->r_snapc->num_snaps; i++)
2153			ceph_encode_64(&p, req->r_snapc->snaps[i]);
2154	} else {
2155		ceph_encode_64(&p, 0); /* snap_seq */
2156		ceph_encode_32(&p, 0); /* snaps len */
2157	}
2158
2159	ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
2160	BUG_ON(p > end - 8); /* space for features */
2161
2162	msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
2163	/* front_len is finalized in encode_request_finish() */
2164	msg->front.iov_len = p - msg->front.iov_base;
2165	msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2166	msg->hdr.data_len = cpu_to_le32(data_len);
2167	/*
2168	 * The header "data_off" is a hint to the receiver allowing it
2169	 * to align received data into its buffers such that there's no
2170	 * need to re-copy it before writing it to disk (direct I/O).
2171	 */
2172	msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
2173
2174	dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
2175	     req->r_t.target_oid.name, req->r_t.target_oid.name_len);
2176}
2177
2178static void encode_request_finish(struct ceph_msg *msg)
2179{
2180	void *p = msg->front.iov_base;
2181	void *const partial_end = p + msg->front.iov_len;
2182	void *const end = p + msg->front_alloc_len;
2183
2184	if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
2185		/* luminous OSD -- encode features and be done */
2186		p = partial_end;
2187		ceph_encode_64(&p, msg->con->peer_features);
2188	} else {
2189		struct {
2190			char spgid[CEPH_ENCODING_START_BLK_LEN +
2191				   CEPH_PGID_ENCODING_LEN + 1];
2192			__le32 hash;
2193			__le32 epoch;
2194			__le32 flags;
2195			char reqid[CEPH_ENCODING_START_BLK_LEN +
2196				   sizeof(struct ceph_osd_reqid)];
2197			char trace[sizeof(struct ceph_blkin_trace_info)];
2198			__le32 client_inc;
2199			struct ceph_timespec mtime;
2200		} __packed head;
2201		struct ceph_pg pgid;
2202		void *oloc, *oid, *tail;
2203		int oloc_len, oid_len, tail_len;
2204		int len;
2205
2206		/*
2207		 * Pre-luminous OSD -- reencode v8 into v4 using @head
2208		 * as a temporary buffer.  Encode the raw PG; the rest
2209		 * is just a matter of moving oloc, oid and tail blobs
2210		 * around.
2211		 */
2212		memcpy(&head, p, sizeof(head));
2213		p += sizeof(head);
2214
2215		oloc = p;
2216		p += CEPH_ENCODING_START_BLK_LEN;
2217		pgid.pool = ceph_decode_64(&p);
2218		p += 4 + 4; /* preferred, key len */
2219		len = ceph_decode_32(&p);
2220		p += len;   /* nspace */
2221		oloc_len = p - oloc;
2222
2223		oid = p;
2224		len = ceph_decode_32(&p);
2225		p += len;
2226		oid_len = p - oid;
2227
2228		tail = p;
2229		tail_len = partial_end - p;
2230
2231		p = msg->front.iov_base;
2232		ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
2233		ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
2234		ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
2235		ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));
2236
2237		/* reassert_version */
2238		memset(p, 0, sizeof(struct ceph_eversion));
2239		p += sizeof(struct ceph_eversion);
2240
2241		BUG_ON(p >= oloc);
2242		memmove(p, oloc, oloc_len);
2243		p += oloc_len;
2244
2245		pgid.seed = le32_to_cpu(head.hash);
2246		encode_pgid(&p, &pgid); /* raw pg */
2247
2248		BUG_ON(p >= oid);
2249		memmove(p, oid, oid_len);
2250		p += oid_len;
2251
2252		/* tail -- ops, snapid, snapc, retry_attempt */
2253		BUG_ON(p >= tail);
2254		memmove(p, tail, tail_len);
2255		p += tail_len;
2256
2257		msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
2258	}
2259
2260	BUG_ON(p > end);
2261	msg->front.iov_len = p - msg->front.iov_base;
2262	msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2263
2264	dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
2265	     le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
2266	     le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
2267	     le16_to_cpu(msg->hdr.version));
2268}
2269
2270/*
2271 * @req has to be assigned a tid and registered.
2272 */
2273static void send_request(struct ceph_osd_request *req)
2274{
2275	struct ceph_osd *osd = req->r_osd;
2276
2277	verify_osd_locked(osd);
2278	WARN_ON(osd->o_osd != req->r_t.osd);
2279
2280	/* backoff? */
2281	if (should_plug_request(req))
2282		return;
2283
2284	/*
2285	 * We may have a previously queued request message hanging
2286	 * around.  Cancel it to avoid corrupting the msgr.
2287	 */
2288	if (req->r_sent)
2289		ceph_msg_revoke(req->r_request);
2290
2291	req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
2292	if (req->r_attempts)
2293		req->r_flags |= CEPH_OSD_FLAG_RETRY;
2294	else
2295		WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
2296
2297	encode_request_partial(req, req->r_request);
2298
2299	dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2300	     __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2301	     req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2302	     req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
2303	     req->r_attempts);
2304
2305	req->r_t.paused = false;
2306	req->r_stamp = jiffies;
2307	req->r_attempts++;
2308
2309	req->r_sent = osd->o_incarnation;
2310	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
2311	ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
2312}
2313
2314static void maybe_request_map(struct ceph_osd_client *osdc)
2315{
2316	bool continuous = false;
2317
2318	verify_osdc_locked(osdc);
2319	WARN_ON(!osdc->osdmap->epoch);
2320
2321	if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2322	    ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
2323	    ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2324		dout("%s osdc %p continuous\n", __func__, osdc);
2325		continuous = true;
2326	} else {
2327		dout("%s osdc %p onetime\n", __func__, osdc);
2328	}
2329
2330	if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
2331			       osdc->osdmap->epoch + 1, continuous))
2332		ceph_monc_renew_subs(&osdc->client->monc);
2333}
2334
2335static void complete_request(struct ceph_osd_request *req, int err);
2336static void send_map_check(struct ceph_osd_request *req);
2337
2338static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2339{
2340	struct ceph_osd_client *osdc = req->r_osdc;
2341	struct ceph_osd *osd;
2342	enum calc_target_result ct_res;
2343	int err = 0;
2344	bool need_send = false;
2345	bool promoted = false;
2346
2347	WARN_ON(req->r_tid);
2348	dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
2349
2350again:
2351	ct_res = calc_target(osdc, &req->r_t, false);
2352	if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
2353		goto promote;
2354
2355	osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
2356	if (IS_ERR(osd)) {
2357		WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
2358		goto promote;
2359	}
2360
2361	if (osdc->abort_err) {
2362		dout("req %p abort_err %d\n", req, osdc->abort_err);
2363		err = osdc->abort_err;
2364	} else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2365		dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
2366		     osdc->epoch_barrier);
2367		req->r_t.paused = true;
2368		maybe_request_map(osdc);
2369	} else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2370		   ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2371		dout("req %p pausewr\n", req);
2372		req->r_t.paused = true;
2373		maybe_request_map(osdc);
2374	} else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2375		   ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2376		dout("req %p pauserd\n", req);
2377		req->r_t.paused = true;
2378		maybe_request_map(osdc);
2379	} else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2380		   !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
2381				     CEPH_OSD_FLAG_FULL_FORCE)) &&
2382		   (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2383		    pool_full(osdc, req->r_t.base_oloc.pool))) {
2384		dout("req %p full/pool_full\n", req);
2385		if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) {
2386			err = -ENOSPC;
2387		} else {
2388			pr_warn_ratelimited("FULL or reached pool quota\n");
 
 
 
 
2389			req->r_t.paused = true;
2390			maybe_request_map(osdc);
2391		}
2392	} else if (!osd_homeless(osd)) {
2393		need_send = true;
2394	} else {
2395		maybe_request_map(osdc);
2396	}
2397
2398	mutex_lock(&osd->lock);
2399	/*
2400	 * Assign the tid atomically with send_request() to protect
2401	 * multiple writes to the same object from racing with each
2402	 * other, resulting in out of order ops on the OSDs.
2403	 */
2404	req->r_tid = atomic64_inc_return(&osdc->last_tid);
2405	link_request(osd, req);
2406	if (need_send)
2407		send_request(req);
2408	else if (err)
2409		complete_request(req, err);
2410	mutex_unlock(&osd->lock);
2411
2412	if (!err && ct_res == CALC_TARGET_POOL_DNE)
2413		send_map_check(req);
2414
2415	if (promoted)
2416		downgrade_write(&osdc->lock);
2417	return;
2418
2419promote:
2420	up_read(&osdc->lock);
2421	down_write(&osdc->lock);
2422	wrlocked = true;
2423	promoted = true;
2424	goto again;
2425}
2426
2427static void account_request(struct ceph_osd_request *req)
2428{
2429	WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
2430	WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2431
2432	req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2433	atomic_inc(&req->r_osdc->num_requests);
2434
2435	req->r_start_stamp = jiffies;
2436	req->r_start_latency = ktime_get();
2437}
2438
2439static void submit_request(struct ceph_osd_request *req, bool wrlocked)
2440{
2441	ceph_osdc_get_request(req);
2442	account_request(req);
2443	__submit_request(req, wrlocked);
2444}
2445
2446static void finish_request(struct ceph_osd_request *req)
2447{
2448	struct ceph_osd_client *osdc = req->r_osdc;
2449
2450	WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2451	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2452
2453	req->r_end_latency = ktime_get();
2454
2455	if (req->r_osd)
 
2456		unlink_request(req->r_osd, req);
 
2457	atomic_dec(&osdc->num_requests);
2458
2459	/*
2460	 * If an OSD has failed or returned and a request has been sent
2461	 * twice, it's possible to get a reply and end up here while the
2462	 * request message is queued for delivery.  We will ignore the
2463	 * reply, so not a big deal, but better to try and catch it.
2464	 */
2465	ceph_msg_revoke(req->r_request);
2466	ceph_msg_revoke_incoming(req->r_reply);
2467}
2468
2469static void __complete_request(struct ceph_osd_request *req)
2470{
2471	dout("%s req %p tid %llu cb %ps result %d\n", __func__, req,
2472	     req->r_tid, req->r_callback, req->r_result);
2473
2474	if (req->r_callback)
2475		req->r_callback(req);
2476	complete_all(&req->r_completion);
2477	ceph_osdc_put_request(req);
2478}
2479
2480static void complete_request_workfn(struct work_struct *work)
2481{
2482	struct ceph_osd_request *req =
2483	    container_of(work, struct ceph_osd_request, r_complete_work);
2484
2485	__complete_request(req);
2486}
2487
2488/*
2489 * This is open-coded in handle_reply().
2490 */
2491static void complete_request(struct ceph_osd_request *req, int err)
2492{
2493	dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2494
2495	req->r_result = err;
2496	finish_request(req);
2497
2498	INIT_WORK(&req->r_complete_work, complete_request_workfn);
2499	queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
2500}
2501
2502static void cancel_map_check(struct ceph_osd_request *req)
2503{
2504	struct ceph_osd_client *osdc = req->r_osdc;
2505	struct ceph_osd_request *lookup_req;
2506
2507	verify_osdc_wrlocked(osdc);
2508
2509	lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2510	if (!lookup_req)
2511		return;
2512
2513	WARN_ON(lookup_req != req);
2514	erase_request_mc(&osdc->map_checks, req);
2515	ceph_osdc_put_request(req);
2516}
2517
2518static void cancel_request(struct ceph_osd_request *req)
2519{
2520	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
2521
2522	cancel_map_check(req);
2523	finish_request(req);
2524	complete_all(&req->r_completion);
2525	ceph_osdc_put_request(req);
2526}
2527
2528static void abort_request(struct ceph_osd_request *req, int err)
2529{
2530	dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
2531
2532	cancel_map_check(req);
2533	complete_request(req, err);
2534}
2535
2536static int abort_fn(struct ceph_osd_request *req, void *arg)
2537{
2538	int err = *(int *)arg;
2539
2540	abort_request(req, err);
2541	return 0; /* continue iteration */
2542}
2543
2544/*
2545 * Abort all in-flight requests with @err and arrange for all future
2546 * requests to be failed immediately.
2547 */
2548void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
2549{
2550	dout("%s osdc %p err %d\n", __func__, osdc, err);
2551	down_write(&osdc->lock);
2552	for_each_request(osdc, abort_fn, &err);
2553	osdc->abort_err = err;
2554	up_write(&osdc->lock);
2555}
2556EXPORT_SYMBOL(ceph_osdc_abort_requests);
2557
2558void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc)
2559{
2560	down_write(&osdc->lock);
2561	osdc->abort_err = 0;
2562	up_write(&osdc->lock);
2563}
2564EXPORT_SYMBOL(ceph_osdc_clear_abort_err);
2565
2566static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2567{
2568	if (likely(eb > osdc->epoch_barrier)) {
2569		dout("updating epoch_barrier from %u to %u\n",
2570				osdc->epoch_barrier, eb);
2571		osdc->epoch_barrier = eb;
2572		/* Request map if we're not to the barrier yet */
2573		if (eb > osdc->osdmap->epoch)
2574			maybe_request_map(osdc);
2575	}
2576}
2577
2578void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
2579{
2580	down_read(&osdc->lock);
2581	if (unlikely(eb > osdc->epoch_barrier)) {
2582		up_read(&osdc->lock);
2583		down_write(&osdc->lock);
2584		update_epoch_barrier(osdc, eb);
2585		up_write(&osdc->lock);
2586	} else {
2587		up_read(&osdc->lock);
2588	}
2589}
2590EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);
2591
2592/*
2593 * We can end up releasing caps as a result of abort_request().
2594 * In that case, we probably want to ensure that the cap release message
2595 * has an updated epoch barrier in it, so set the epoch barrier prior to
2596 * aborting the first request.
2597 */
2598static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
2599{
2600	struct ceph_osd_client *osdc = req->r_osdc;
2601	bool *victims = arg;
2602
2603	if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2604	    (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2605	     pool_full(osdc, req->r_t.base_oloc.pool))) {
2606		if (!*victims) {
2607			update_epoch_barrier(osdc, osdc->osdmap->epoch);
2608			*victims = true;
2609		}
2610		abort_request(req, -ENOSPC);
2611	}
2612
2613	return 0; /* continue iteration */
2614}
2615
2616/*
2617 * Drop all pending requests that are stalled waiting on a full condition to
2618 * clear, and complete them with ENOSPC as the return code. Set the
2619 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
2620 * cancelled.
2621 */
2622static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
2623{
2624	bool victims = false;
2625
2626	if (ceph_test_opt(osdc->client, ABORT_ON_FULL) &&
2627	    (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
2628		for_each_request(osdc, abort_on_full_fn, &victims);
2629}
2630
2631static void check_pool_dne(struct ceph_osd_request *req)
2632{
2633	struct ceph_osd_client *osdc = req->r_osdc;
2634	struct ceph_osdmap *map = osdc->osdmap;
2635
2636	verify_osdc_wrlocked(osdc);
2637	WARN_ON(!map->epoch);
2638
2639	if (req->r_attempts) {
2640		/*
2641		 * We sent a request earlier, which means that
2642		 * previously the pool existed, and now it does not
2643		 * (i.e., it was deleted).
2644		 */
2645		req->r_map_dne_bound = map->epoch;
2646		dout("%s req %p tid %llu pool disappeared\n", __func__, req,
2647		     req->r_tid);
2648	} else {
2649		dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
2650		     req, req->r_tid, req->r_map_dne_bound, map->epoch);
2651	}
2652
2653	if (req->r_map_dne_bound) {
2654		if (map->epoch >= req->r_map_dne_bound) {
2655			/* we had a new enough map */
2656			pr_info_ratelimited("tid %llu pool does not exist\n",
2657					    req->r_tid);
2658			complete_request(req, -ENOENT);
2659		}
2660	} else {
2661		send_map_check(req);
2662	}
2663}
2664
2665static void map_check_cb(struct ceph_mon_generic_request *greq)
2666{
2667	struct ceph_osd_client *osdc = &greq->monc->client->osdc;
2668	struct ceph_osd_request *req;
2669	u64 tid = greq->private_data;
2670
2671	WARN_ON(greq->result || !greq->u.newest);
2672
2673	down_write(&osdc->lock);
2674	req = lookup_request_mc(&osdc->map_checks, tid);
2675	if (!req) {
2676		dout("%s tid %llu dne\n", __func__, tid);
2677		goto out_unlock;
2678	}
2679
2680	dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
2681	     req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
2682	if (!req->r_map_dne_bound)
2683		req->r_map_dne_bound = greq->u.newest;
2684	erase_request_mc(&osdc->map_checks, req);
2685	check_pool_dne(req);
2686
2687	ceph_osdc_put_request(req);
2688out_unlock:
2689	up_write(&osdc->lock);
2690}
2691
2692static void send_map_check(struct ceph_osd_request *req)
2693{
2694	struct ceph_osd_client *osdc = req->r_osdc;
2695	struct ceph_osd_request *lookup_req;
2696	int ret;
2697
2698	verify_osdc_wrlocked(osdc);
2699
2700	lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
2701	if (lookup_req) {
2702		WARN_ON(lookup_req != req);
2703		return;
2704	}
2705
2706	ceph_osdc_get_request(req);
2707	insert_request_mc(&osdc->map_checks, req);
2708	ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
2709					  map_check_cb, req->r_tid);
2710	WARN_ON(ret);
2711}
2712
2713/*
2714 * lingering requests, watch/notify v2 infrastructure
2715 */
2716static void linger_release(struct kref *kref)
2717{
2718	struct ceph_osd_linger_request *lreq =
2719	    container_of(kref, struct ceph_osd_linger_request, kref);
2720
2721	dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
2722	     lreq->reg_req, lreq->ping_req);
2723	WARN_ON(!RB_EMPTY_NODE(&lreq->node));
2724	WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
2725	WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2726	WARN_ON(!list_empty(&lreq->scan_item));
2727	WARN_ON(!list_empty(&lreq->pending_lworks));
2728	WARN_ON(lreq->osd);
2729
2730	if (lreq->reg_req)
2731		ceph_osdc_put_request(lreq->reg_req);
2732	if (lreq->ping_req)
2733		ceph_osdc_put_request(lreq->ping_req);
 
 
 
2734	target_destroy(&lreq->t);
2735	kfree(lreq);
2736}
2737
2738static void linger_put(struct ceph_osd_linger_request *lreq)
2739{
2740	if (lreq)
2741		kref_put(&lreq->kref, linger_release);
2742}
2743
2744static struct ceph_osd_linger_request *
2745linger_get(struct ceph_osd_linger_request *lreq)
2746{
2747	kref_get(&lreq->kref);
2748	return lreq;
2749}
2750
2751static struct ceph_osd_linger_request *
2752linger_alloc(struct ceph_osd_client *osdc)
2753{
2754	struct ceph_osd_linger_request *lreq;
2755
2756	lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
2757	if (!lreq)
2758		return NULL;
2759
2760	kref_init(&lreq->kref);
2761	mutex_init(&lreq->lock);
2762	RB_CLEAR_NODE(&lreq->node);
2763	RB_CLEAR_NODE(&lreq->osdc_node);
2764	RB_CLEAR_NODE(&lreq->mc_node);
2765	INIT_LIST_HEAD(&lreq->scan_item);
2766	INIT_LIST_HEAD(&lreq->pending_lworks);
2767	init_completion(&lreq->reg_commit_wait);
2768	init_completion(&lreq->notify_finish_wait);
2769
2770	lreq->osdc = osdc;
2771	target_init(&lreq->t);
2772
2773	dout("%s lreq %p\n", __func__, lreq);
2774	return lreq;
2775}
2776
2777DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
2778DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
2779DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2780
2781/*
2782 * Create linger request <-> OSD session relation.
2783 *
2784 * @lreq has to be registered, @osd may be homeless.
2785 */
2786static void link_linger(struct ceph_osd *osd,
2787			struct ceph_osd_linger_request *lreq)
2788{
2789	verify_osd_locked(osd);
2790	WARN_ON(!lreq->linger_id || lreq->osd);
2791	dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2792	     osd->o_osd, lreq, lreq->linger_id);
2793
2794	if (!osd_homeless(osd))
2795		__remove_osd_from_lru(osd);
2796	else
2797		atomic_inc(&osd->o_osdc->num_homeless);
2798
2799	get_osd(osd);
2800	insert_linger(&osd->o_linger_requests, lreq);
2801	lreq->osd = osd;
2802}
2803
2804static void unlink_linger(struct ceph_osd *osd,
2805			  struct ceph_osd_linger_request *lreq)
2806{
2807	verify_osd_locked(osd);
2808	WARN_ON(lreq->osd != osd);
2809	dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
2810	     osd->o_osd, lreq, lreq->linger_id);
2811
2812	lreq->osd = NULL;
2813	erase_linger(&osd->o_linger_requests, lreq);
2814	put_osd(osd);
2815
2816	if (!osd_homeless(osd))
2817		maybe_move_osd_to_lru(osd);
2818	else
2819		atomic_dec(&osd->o_osdc->num_homeless);
2820}
2821
2822static bool __linger_registered(struct ceph_osd_linger_request *lreq)
2823{
2824	verify_osdc_locked(lreq->osdc);
2825
2826	return !RB_EMPTY_NODE(&lreq->osdc_node);
2827}
2828
2829static bool linger_registered(struct ceph_osd_linger_request *lreq)
2830{
2831	struct ceph_osd_client *osdc = lreq->osdc;
2832	bool registered;
2833
2834	down_read(&osdc->lock);
2835	registered = __linger_registered(lreq);
2836	up_read(&osdc->lock);
2837
2838	return registered;
2839}
2840
2841static void linger_register(struct ceph_osd_linger_request *lreq)
2842{
2843	struct ceph_osd_client *osdc = lreq->osdc;
2844
2845	verify_osdc_wrlocked(osdc);
2846	WARN_ON(lreq->linger_id);
2847
2848	linger_get(lreq);
2849	lreq->linger_id = ++osdc->last_linger_id;
2850	insert_linger_osdc(&osdc->linger_requests, lreq);
2851}
2852
2853static void linger_unregister(struct ceph_osd_linger_request *lreq)
2854{
2855	struct ceph_osd_client *osdc = lreq->osdc;
2856
2857	verify_osdc_wrlocked(osdc);
2858
2859	erase_linger_osdc(&osdc->linger_requests, lreq);
2860	linger_put(lreq);
2861}
2862
2863static void cancel_linger_request(struct ceph_osd_request *req)
2864{
2865	struct ceph_osd_linger_request *lreq = req->r_priv;
2866
2867	WARN_ON(!req->r_linger);
2868	cancel_request(req);
2869	linger_put(lreq);
2870}
2871
2872struct linger_work {
2873	struct work_struct work;
2874	struct ceph_osd_linger_request *lreq;
2875	struct list_head pending_item;
2876	unsigned long queued_stamp;
2877
2878	union {
2879		struct {
2880			u64 notify_id;
2881			u64 notifier_id;
2882			void *payload; /* points into @msg front */
2883			size_t payload_len;
2884
2885			struct ceph_msg *msg; /* for ceph_msg_put() */
2886		} notify;
2887		struct {
2888			int err;
2889		} error;
2890	};
2891};
2892
2893static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
2894				       work_func_t workfn)
2895{
2896	struct linger_work *lwork;
2897
2898	lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
2899	if (!lwork)
2900		return NULL;
2901
2902	INIT_WORK(&lwork->work, workfn);
2903	INIT_LIST_HEAD(&lwork->pending_item);
2904	lwork->lreq = linger_get(lreq);
2905
2906	return lwork;
2907}
2908
2909static void lwork_free(struct linger_work *lwork)
2910{
2911	struct ceph_osd_linger_request *lreq = lwork->lreq;
2912
2913	mutex_lock(&lreq->lock);
2914	list_del(&lwork->pending_item);
2915	mutex_unlock(&lreq->lock);
2916
2917	linger_put(lreq);
2918	kfree(lwork);
2919}
2920
2921static void lwork_queue(struct linger_work *lwork)
2922{
2923	struct ceph_osd_linger_request *lreq = lwork->lreq;
2924	struct ceph_osd_client *osdc = lreq->osdc;
2925
2926	verify_lreq_locked(lreq);
2927	WARN_ON(!list_empty(&lwork->pending_item));
2928
2929	lwork->queued_stamp = jiffies;
2930	list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2931	queue_work(osdc->notify_wq, &lwork->work);
2932}
2933
2934static void do_watch_notify(struct work_struct *w)
2935{
2936	struct linger_work *lwork = container_of(w, struct linger_work, work);
2937	struct ceph_osd_linger_request *lreq = lwork->lreq;
2938
2939	if (!linger_registered(lreq)) {
2940		dout("%s lreq %p not registered\n", __func__, lreq);
2941		goto out;
2942	}
2943
2944	WARN_ON(!lreq->is_watch);
2945	dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
2946	     __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
2947	     lwork->notify.payload_len);
2948	lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
2949		  lwork->notify.notifier_id, lwork->notify.payload,
2950		  lwork->notify.payload_len);
2951
2952out:
2953	ceph_msg_put(lwork->notify.msg);
2954	lwork_free(lwork);
2955}
2956
2957static void do_watch_error(struct work_struct *w)
2958{
2959	struct linger_work *lwork = container_of(w, struct linger_work, work);
2960	struct ceph_osd_linger_request *lreq = lwork->lreq;
2961
2962	if (!linger_registered(lreq)) {
2963		dout("%s lreq %p not registered\n", __func__, lreq);
2964		goto out;
2965	}
2966
2967	dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
2968	lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
2969
2970out:
2971	lwork_free(lwork);
2972}
2973
2974static void queue_watch_error(struct ceph_osd_linger_request *lreq)
2975{
2976	struct linger_work *lwork;
2977
2978	lwork = lwork_alloc(lreq, do_watch_error);
2979	if (!lwork) {
2980		pr_err("failed to allocate error-lwork\n");
2981		return;
2982	}
2983
2984	lwork->error.err = lreq->last_error;
2985	lwork_queue(lwork);
2986}
2987
2988static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
2989				       int result)
2990{
2991	if (!completion_done(&lreq->reg_commit_wait)) {
2992		lreq->reg_commit_error = (result <= 0 ? result : 0);
2993		complete_all(&lreq->reg_commit_wait);
2994	}
2995}
2996
2997static void linger_commit_cb(struct ceph_osd_request *req)
2998{
2999	struct ceph_osd_linger_request *lreq = req->r_priv;
3000
3001	mutex_lock(&lreq->lock);
 
 
 
 
 
 
3002	dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
3003	     lreq->linger_id, req->r_result);
3004	linger_reg_commit_complete(lreq, req->r_result);
3005	lreq->committed = true;
3006
3007	if (!lreq->is_watch) {
3008		struct ceph_osd_data *osd_data =
3009		    osd_req_op_data(req, 0, notify, response_data);
3010		void *p = page_address(osd_data->pages[0]);
3011
3012		WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
3013			osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
3014
3015		/* make note of the notify_id */
3016		if (req->r_ops[0].outdata_len >= sizeof(u64)) {
3017			lreq->notify_id = ceph_decode_64(&p);
3018			dout("lreq %p notify_id %llu\n", lreq,
3019			     lreq->notify_id);
3020		} else {
3021			dout("lreq %p no notify_id\n", lreq);
3022		}
3023	}
3024
 
3025	mutex_unlock(&lreq->lock);
3026	linger_put(lreq);
3027}
3028
3029static int normalize_watch_error(int err)
3030{
3031	/*
3032	 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
3033	 * notification and a failure to reconnect because we raced with
3034	 * the delete appear the same to the user.
3035	 */
3036	if (err == -ENOENT)
3037		err = -ENOTCONN;
3038
3039	return err;
3040}
3041
3042static void linger_reconnect_cb(struct ceph_osd_request *req)
3043{
3044	struct ceph_osd_linger_request *lreq = req->r_priv;
3045
3046	mutex_lock(&lreq->lock);
 
 
 
 
 
 
3047	dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
3048	     lreq, lreq->linger_id, req->r_result, lreq->last_error);
3049	if (req->r_result < 0) {
3050		if (!lreq->last_error) {
3051			lreq->last_error = normalize_watch_error(req->r_result);
3052			queue_watch_error(lreq);
3053		}
3054	}
3055
 
3056	mutex_unlock(&lreq->lock);
3057	linger_put(lreq);
3058}
3059
3060static void send_linger(struct ceph_osd_linger_request *lreq)
3061{
3062	struct ceph_osd_request *req = lreq->reg_req;
3063	struct ceph_osd_req_op *op = &req->r_ops[0];
 
3064
3065	verify_osdc_wrlocked(req->r_osdc);
 
3066	dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3067
3068	if (req->r_osd)
3069		cancel_linger_request(req);
 
 
 
 
 
 
3070
3071	request_reinit(req);
3072	target_copy(&req->r_t, &lreq->t);
3073	req->r_mtime = lreq->mtime;
3074
3075	mutex_lock(&lreq->lock);
3076	if (lreq->is_watch && lreq->committed) {
3077		WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3078			op->watch.cookie != lreq->linger_id);
3079		op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
3080		op->watch.gen = ++lreq->register_gen;
3081		dout("lreq %p reconnect register_gen %u\n", lreq,
3082		     op->watch.gen);
3083		req->r_callback = linger_reconnect_cb;
3084	} else {
3085		if (!lreq->is_watch)
 
 
 
3086			lreq->notify_id = 0;
3087		else
3088			WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
 
 
 
 
 
 
3089		dout("lreq %p register\n", lreq);
3090		req->r_callback = linger_commit_cb;
3091	}
3092	mutex_unlock(&lreq->lock);
 
 
3093
3094	req->r_priv = linger_get(lreq);
3095	req->r_linger = true;
 
 
3096
3097	submit_request(req, true);
3098}
3099
3100static void linger_ping_cb(struct ceph_osd_request *req)
3101{
3102	struct ceph_osd_linger_request *lreq = req->r_priv;
3103
3104	mutex_lock(&lreq->lock);
 
 
 
 
 
 
3105	dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
3106	     __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
3107	     lreq->last_error);
3108	if (lreq->register_gen == req->r_ops[0].watch.gen) {
3109		if (!req->r_result) {
3110			lreq->watch_valid_thru = lreq->ping_sent;
3111		} else if (!lreq->last_error) {
3112			lreq->last_error = normalize_watch_error(req->r_result);
3113			queue_watch_error(lreq);
3114		}
3115	} else {
3116		dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
3117		     lreq->register_gen, req->r_ops[0].watch.gen);
3118	}
3119
 
3120	mutex_unlock(&lreq->lock);
3121	linger_put(lreq);
3122}
3123
3124static void send_linger_ping(struct ceph_osd_linger_request *lreq)
3125{
3126	struct ceph_osd_client *osdc = lreq->osdc;
3127	struct ceph_osd_request *req = lreq->ping_req;
3128	struct ceph_osd_req_op *op = &req->r_ops[0];
3129
3130	if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
3131		dout("%s PAUSERD\n", __func__);
3132		return;
3133	}
3134
3135	lreq->ping_sent = jiffies;
3136	dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
3137	     __func__, lreq, lreq->linger_id, lreq->ping_sent,
3138	     lreq->register_gen);
3139
3140	if (req->r_osd)
3141		cancel_linger_request(req);
 
 
 
3142
3143	request_reinit(req);
3144	target_copy(&req->r_t, &lreq->t);
3145
3146	WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
3147		op->watch.cookie != lreq->linger_id ||
3148		op->watch.op != CEPH_OSD_WATCH_OP_PING);
3149	op->watch.gen = lreq->register_gen;
3150	req->r_callback = linger_ping_cb;
 
 
 
 
3151	req->r_priv = linger_get(lreq);
3152	req->r_linger = true;
 
3153
3154	ceph_osdc_get_request(req);
3155	account_request(req);
3156	req->r_tid = atomic64_inc_return(&osdc->last_tid);
3157	link_request(lreq->osd, req);
3158	send_request(req);
3159}
3160
3161static void linger_submit(struct ceph_osd_linger_request *lreq)
3162{
3163	struct ceph_osd_client *osdc = lreq->osdc;
3164	struct ceph_osd *osd;
3165
3166	down_write(&osdc->lock);
3167	linger_register(lreq);
3168	if (lreq->is_watch) {
3169		lreq->reg_req->r_ops[0].watch.cookie = lreq->linger_id;
3170		lreq->ping_req->r_ops[0].watch.cookie = lreq->linger_id;
3171	} else {
3172		lreq->reg_req->r_ops[0].notify.cookie = lreq->linger_id;
3173	}
3174
3175	calc_target(osdc, &lreq->t, false);
3176	osd = lookup_create_osd(osdc, lreq->t.osd, true);
3177	link_linger(osd, lreq);
3178
3179	send_linger(lreq);
3180	up_write(&osdc->lock);
3181}
3182
3183static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
3184{
3185	struct ceph_osd_client *osdc = lreq->osdc;
3186	struct ceph_osd_linger_request *lookup_lreq;
3187
3188	verify_osdc_wrlocked(osdc);
3189
3190	lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3191				       lreq->linger_id);
3192	if (!lookup_lreq)
3193		return;
3194
3195	WARN_ON(lookup_lreq != lreq);
3196	erase_linger_mc(&osdc->linger_map_checks, lreq);
3197	linger_put(lreq);
3198}
3199
3200/*
3201 * @lreq has to be both registered and linked.
3202 */
3203static void __linger_cancel(struct ceph_osd_linger_request *lreq)
3204{
3205	if (lreq->is_watch && lreq->ping_req->r_osd)
3206		cancel_linger_request(lreq->ping_req);
3207	if (lreq->reg_req->r_osd)
3208		cancel_linger_request(lreq->reg_req);
3209	cancel_linger_map_check(lreq);
3210	unlink_linger(lreq->osd, lreq);
3211	linger_unregister(lreq);
3212}
3213
3214static void linger_cancel(struct ceph_osd_linger_request *lreq)
3215{
3216	struct ceph_osd_client *osdc = lreq->osdc;
3217
3218	down_write(&osdc->lock);
3219	if (__linger_registered(lreq))
3220		__linger_cancel(lreq);
3221	up_write(&osdc->lock);
3222}
3223
3224static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
3225
3226static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
3227{
3228	struct ceph_osd_client *osdc = lreq->osdc;
3229	struct ceph_osdmap *map = osdc->osdmap;
3230
3231	verify_osdc_wrlocked(osdc);
3232	WARN_ON(!map->epoch);
3233
3234	if (lreq->register_gen) {
3235		lreq->map_dne_bound = map->epoch;
3236		dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
3237		     lreq, lreq->linger_id);
3238	} else {
3239		dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
3240		     __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3241		     map->epoch);
3242	}
3243
3244	if (lreq->map_dne_bound) {
3245		if (map->epoch >= lreq->map_dne_bound) {
3246			/* we had a new enough map */
3247			pr_info("linger_id %llu pool does not exist\n",
3248				lreq->linger_id);
3249			linger_reg_commit_complete(lreq, -ENOENT);
3250			__linger_cancel(lreq);
3251		}
3252	} else {
3253		send_linger_map_check(lreq);
3254	}
3255}
3256
3257static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
3258{
3259	struct ceph_osd_client *osdc = &greq->monc->client->osdc;
3260	struct ceph_osd_linger_request *lreq;
3261	u64 linger_id = greq->private_data;
3262
3263	WARN_ON(greq->result || !greq->u.newest);
3264
3265	down_write(&osdc->lock);
3266	lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
3267	if (!lreq) {
3268		dout("%s linger_id %llu dne\n", __func__, linger_id);
3269		goto out_unlock;
3270	}
3271
3272	dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
3273	     __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
3274	     greq->u.newest);
3275	if (!lreq->map_dne_bound)
3276		lreq->map_dne_bound = greq->u.newest;
3277	erase_linger_mc(&osdc->linger_map_checks, lreq);
3278	check_linger_pool_dne(lreq);
3279
3280	linger_put(lreq);
3281out_unlock:
3282	up_write(&osdc->lock);
3283}
3284
3285static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
3286{
3287	struct ceph_osd_client *osdc = lreq->osdc;
3288	struct ceph_osd_linger_request *lookup_lreq;
3289	int ret;
3290
3291	verify_osdc_wrlocked(osdc);
3292
3293	lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
3294				       lreq->linger_id);
3295	if (lookup_lreq) {
3296		WARN_ON(lookup_lreq != lreq);
3297		return;
3298	}
3299
3300	linger_get(lreq);
3301	insert_linger_mc(&osdc->linger_map_checks, lreq);
3302	ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
3303					  linger_map_check_cb, lreq->linger_id);
3304	WARN_ON(ret);
3305}
3306
3307static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
3308{
3309	int ret;
3310
3311	dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3312	ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
3313	return ret ?: lreq->reg_commit_error;
3314}
3315
3316static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
 
3317{
3318	int ret;
3319
3320	dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
3321	ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
3322	return ret ?: lreq->notify_finish_error;
 
 
 
 
 
 
3323}
3324
3325/*
3326 * Timeout callback, called every N seconds.  When 1 or more OSD
3327 * requests has been active for more than N seconds, we send a keepalive
3328 * (tag + timestamp) to its OSD to ensure any communications channel
3329 * reset is detected.
3330 */
3331static void handle_timeout(struct work_struct *work)
3332{
3333	struct ceph_osd_client *osdc =
3334		container_of(work, struct ceph_osd_client, timeout_work.work);
3335	struct ceph_options *opts = osdc->client->options;
3336	unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3337	unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3338	LIST_HEAD(slow_osds);
3339	struct rb_node *n, *p;
3340
3341	dout("%s osdc %p\n", __func__, osdc);
3342	down_write(&osdc->lock);
3343
3344	/*
3345	 * ping osds that are a bit slow.  this ensures that if there
3346	 * is a break in the TCP connection we will notice, and reopen
3347	 * a connection with that osd (from the fault callback).
3348	 */
3349	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
3350		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3351		bool found = false;
3352
3353		for (p = rb_first(&osd->o_requests); p; ) {
3354			struct ceph_osd_request *req =
3355			    rb_entry(p, struct ceph_osd_request, r_node);
3356
3357			p = rb_next(p); /* abort_request() */
3358
3359			if (time_before(req->r_stamp, cutoff)) {
3360				dout(" req %p tid %llu on osd%d is laggy\n",
3361				     req, req->r_tid, osd->o_osd);
3362				found = true;
3363			}
3364			if (opts->osd_request_timeout &&
3365			    time_before(req->r_start_stamp, expiry_cutoff)) {
3366				pr_err_ratelimited("tid %llu on osd%d timeout\n",
3367				       req->r_tid, osd->o_osd);
3368				abort_request(req, -ETIMEDOUT);
3369			}
3370		}
3371		for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
3372			struct ceph_osd_linger_request *lreq =
3373			    rb_entry(p, struct ceph_osd_linger_request, node);
3374
3375			dout(" lreq %p linger_id %llu is served by osd%d\n",
3376			     lreq, lreq->linger_id, osd->o_osd);
3377			found = true;
3378
3379			mutex_lock(&lreq->lock);
3380			if (lreq->is_watch && lreq->committed && !lreq->last_error)
3381				send_linger_ping(lreq);
3382			mutex_unlock(&lreq->lock);
3383		}
3384
3385		if (found)
3386			list_move_tail(&osd->o_keepalive_item, &slow_osds);
3387	}
3388
3389	if (opts->osd_request_timeout) {
3390		for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
3391			struct ceph_osd_request *req =
3392			    rb_entry(p, struct ceph_osd_request, r_node);
3393
3394			p = rb_next(p); /* abort_request() */
3395
3396			if (time_before(req->r_start_stamp, expiry_cutoff)) {
3397				pr_err_ratelimited("tid %llu on osd%d timeout\n",
3398				       req->r_tid, osdc->homeless_osd.o_osd);
3399				abort_request(req, -ETIMEDOUT);
3400			}
3401		}
3402	}
3403
3404	if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
3405		maybe_request_map(osdc);
3406
3407	while (!list_empty(&slow_osds)) {
3408		struct ceph_osd *osd = list_first_entry(&slow_osds,
3409							struct ceph_osd,
3410							o_keepalive_item);
3411		list_del_init(&osd->o_keepalive_item);
3412		ceph_con_keepalive(&osd->o_con);
3413	}
3414
3415	up_write(&osdc->lock);
3416	schedule_delayed_work(&osdc->timeout_work,
3417			      osdc->client->options->osd_keepalive_timeout);
3418}
3419
3420static void handle_osds_timeout(struct work_struct *work)
3421{
3422	struct ceph_osd_client *osdc =
3423		container_of(work, struct ceph_osd_client,
3424			     osds_timeout_work.work);
3425	unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3426	struct ceph_osd *osd, *nosd;
3427
3428	dout("%s osdc %p\n", __func__, osdc);
3429	down_write(&osdc->lock);
3430	list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
3431		if (time_before(jiffies, osd->lru_ttl))
3432			break;
3433
3434		WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3435		WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3436		close_osd(osd);
3437	}
3438
3439	up_write(&osdc->lock);
3440	schedule_delayed_work(&osdc->osds_timeout_work,
3441			      round_jiffies_relative(delay));
3442}
3443
3444static int ceph_oloc_decode(void **p, void *end,
3445			    struct ceph_object_locator *oloc)
3446{
3447	u8 struct_v, struct_cv;
3448	u32 len;
3449	void *struct_end;
3450	int ret = 0;
3451
3452	ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3453	struct_v = ceph_decode_8(p);
3454	struct_cv = ceph_decode_8(p);
3455	if (struct_v < 3) {
3456		pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
3457			struct_v, struct_cv);
3458		goto e_inval;
3459	}
3460	if (struct_cv > 6) {
3461		pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
3462			struct_v, struct_cv);
3463		goto e_inval;
3464	}
3465	len = ceph_decode_32(p);
3466	ceph_decode_need(p, end, len, e_inval);
3467	struct_end = *p + len;
3468
3469	oloc->pool = ceph_decode_64(p);
3470	*p += 4; /* skip preferred */
3471
3472	len = ceph_decode_32(p);
3473	if (len > 0) {
3474		pr_warn("ceph_object_locator::key is set\n");
3475		goto e_inval;
3476	}
3477
3478	if (struct_v >= 5) {
3479		bool changed = false;
3480
3481		len = ceph_decode_32(p);
3482		if (len > 0) {
3483			ceph_decode_need(p, end, len, e_inval);
3484			if (!oloc->pool_ns ||
3485			    ceph_compare_string(oloc->pool_ns, *p, len))
3486				changed = true;
3487			*p += len;
3488		} else {
3489			if (oloc->pool_ns)
3490				changed = true;
3491		}
3492		if (changed) {
3493			/* redirect changes namespace */
3494			pr_warn("ceph_object_locator::nspace is changed\n");
3495			goto e_inval;
3496		}
3497	}
3498
3499	if (struct_v >= 6) {
3500		s64 hash = ceph_decode_64(p);
3501		if (hash != -1) {
3502			pr_warn("ceph_object_locator::hash is set\n");
3503			goto e_inval;
3504		}
3505	}
3506
3507	/* skip the rest */
3508	*p = struct_end;
3509out:
3510	return ret;
3511
3512e_inval:
3513	ret = -EINVAL;
3514	goto out;
3515}
3516
3517static int ceph_redirect_decode(void **p, void *end,
3518				struct ceph_request_redirect *redir)
3519{
3520	u8 struct_v, struct_cv;
3521	u32 len;
3522	void *struct_end;
3523	int ret;
3524
3525	ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
3526	struct_v = ceph_decode_8(p);
3527	struct_cv = ceph_decode_8(p);
3528	if (struct_cv > 1) {
3529		pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
3530			struct_v, struct_cv);
3531		goto e_inval;
3532	}
3533	len = ceph_decode_32(p);
3534	ceph_decode_need(p, end, len, e_inval);
3535	struct_end = *p + len;
3536
3537	ret = ceph_oloc_decode(p, end, &redir->oloc);
3538	if (ret)
3539		goto out;
3540
3541	len = ceph_decode_32(p);
3542	if (len > 0) {
3543		pr_warn("ceph_request_redirect::object_name is set\n");
3544		goto e_inval;
3545	}
3546
3547	/* skip the rest */
3548	*p = struct_end;
3549out:
3550	return ret;
3551
3552e_inval:
3553	ret = -EINVAL;
3554	goto out;
3555}
3556
3557struct MOSDOpReply {
3558	struct ceph_pg pgid;
3559	u64 flags;
3560	int result;
3561	u32 epoch;
3562	int num_ops;
3563	u32 outdata_len[CEPH_OSD_MAX_OPS];
3564	s32 rval[CEPH_OSD_MAX_OPS];
3565	int retry_attempt;
3566	struct ceph_eversion replay_version;
3567	u64 user_version;
3568	struct ceph_request_redirect redirect;
3569};
3570
3571static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
3572{
3573	void *p = msg->front.iov_base;
3574	void *const end = p + msg->front.iov_len;
3575	u16 version = le16_to_cpu(msg->hdr.version);
3576	struct ceph_eversion bad_replay_version;
3577	u8 decode_redir;
3578	u32 len;
3579	int ret;
3580	int i;
3581
3582	ceph_decode_32_safe(&p, end, len, e_inval);
3583	ceph_decode_need(&p, end, len, e_inval);
3584	p += len; /* skip oid */
3585
3586	ret = ceph_decode_pgid(&p, end, &m->pgid);
3587	if (ret)
3588		return ret;
3589
3590	ceph_decode_64_safe(&p, end, m->flags, e_inval);
3591	ceph_decode_32_safe(&p, end, m->result, e_inval);
3592	ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
3593	memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
3594	p += sizeof(bad_replay_version);
3595	ceph_decode_32_safe(&p, end, m->epoch, e_inval);
3596
3597	ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
3598	if (m->num_ops > ARRAY_SIZE(m->outdata_len))
3599		goto e_inval;
3600
3601	ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
3602			 e_inval);
3603	for (i = 0; i < m->num_ops; i++) {
3604		struct ceph_osd_op *op = p;
3605
3606		m->outdata_len[i] = le32_to_cpu(op->payload_len);
3607		p += sizeof(*op);
3608	}
3609
3610	ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
3611	for (i = 0; i < m->num_ops; i++)
3612		ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
3613
3614	if (version >= 5) {
3615		ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
3616		memcpy(&m->replay_version, p, sizeof(m->replay_version));
3617		p += sizeof(m->replay_version);
3618		ceph_decode_64_safe(&p, end, m->user_version, e_inval);
3619	} else {
3620		m->replay_version = bad_replay_version; /* struct */
3621		m->user_version = le64_to_cpu(m->replay_version.version);
3622	}
3623
3624	if (version >= 6) {
3625		if (version >= 7)
3626			ceph_decode_8_safe(&p, end, decode_redir, e_inval);
3627		else
3628			decode_redir = 1;
3629	} else {
3630		decode_redir = 0;
3631	}
3632
3633	if (decode_redir) {
3634		ret = ceph_redirect_decode(&p, end, &m->redirect);
3635		if (ret)
3636			return ret;
3637	} else {
3638		ceph_oloc_init(&m->redirect.oloc);
3639	}
3640
3641	return 0;
3642
3643e_inval:
3644	return -EINVAL;
3645}
3646
3647/*
3648 * Handle MOSDOpReply.  Set ->r_result and call the callback if it is
3649 * specified.
3650 */
3651static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3652{
3653	struct ceph_osd_client *osdc = osd->o_osdc;
3654	struct ceph_osd_request *req;
3655	struct MOSDOpReply m;
3656	u64 tid = le64_to_cpu(msg->hdr.tid);
3657	u32 data_len = 0;
3658	int ret;
3659	int i;
3660
3661	dout("%s msg %p tid %llu\n", __func__, msg, tid);
3662
3663	down_read(&osdc->lock);
3664	if (!osd_registered(osd)) {
3665		dout("%s osd%d unknown\n", __func__, osd->o_osd);
3666		goto out_unlock_osdc;
3667	}
3668	WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
3669
3670	mutex_lock(&osd->lock);
3671	req = lookup_request(&osd->o_requests, tid);
3672	if (!req) {
3673		dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
3674		goto out_unlock_session;
3675	}
3676
3677	m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3678	ret = decode_MOSDOpReply(msg, &m);
3679	m.redirect.oloc.pool_ns = NULL;
3680	if (ret) {
3681		pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
3682		       req->r_tid, ret);
3683		ceph_msg_dump(msg);
3684		goto fail_request;
3685	}
3686	dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
3687	     __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
3688	     m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
3689	     le64_to_cpu(m.replay_version.version), m.user_version);
3690
3691	if (m.retry_attempt >= 0) {
3692		if (m.retry_attempt != req->r_attempts - 1) {
3693			dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
3694			     req, req->r_tid, m.retry_attempt,
3695			     req->r_attempts - 1);
3696			goto out_unlock_session;
3697		}
3698	} else {
3699		WARN_ON(1); /* MOSDOpReply v4 is assumed */
3700	}
3701
3702	if (!ceph_oloc_empty(&m.redirect.oloc)) {
3703		dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
3704		     m.redirect.oloc.pool);
3705		unlink_request(osd, req);
3706		mutex_unlock(&osd->lock);
3707
3708		/*
3709		 * Not ceph_oloc_copy() - changing pool_ns is not
3710		 * supported.
3711		 */
3712		req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3713		req->r_flags |= CEPH_OSD_FLAG_REDIRECTED |
3714				CEPH_OSD_FLAG_IGNORE_OVERLAY |
3715				CEPH_OSD_FLAG_IGNORE_CACHE;
3716		req->r_tid = 0;
3717		__submit_request(req, false);
3718		goto out_unlock_osdc;
3719	}
3720
3721	if (m.result == -EAGAIN) {
3722		dout("req %p tid %llu EAGAIN\n", req, req->r_tid);
3723		unlink_request(osd, req);
3724		mutex_unlock(&osd->lock);
3725
3726		/*
3727		 * The object is missing on the replica or not (yet)
3728		 * readable.  Clear pgid to force a resend to the primary
3729		 * via legacy_change.
3730		 */
3731		req->r_t.pgid.pool = 0;
3732		req->r_t.pgid.seed = 0;
3733		WARN_ON(!req->r_t.used_replica);
3734		req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS |
3735				  CEPH_OSD_FLAG_LOCALIZE_READS);
3736		req->r_tid = 0;
3737		__submit_request(req, false);
3738		goto out_unlock_osdc;
3739	}
3740
3741	if (m.num_ops != req->r_num_ops) {
3742		pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
3743		       req->r_num_ops, req->r_tid);
3744		goto fail_request;
3745	}
3746	for (i = 0; i < req->r_num_ops; i++) {
3747		dout(" req %p tid %llu op %d rval %d len %u\n", req,
3748		     req->r_tid, i, m.rval[i], m.outdata_len[i]);
3749		req->r_ops[i].rval = m.rval[i];
3750		req->r_ops[i].outdata_len = m.outdata_len[i];
3751		data_len += m.outdata_len[i];
3752	}
3753	if (data_len != le32_to_cpu(msg->hdr.data_len)) {
3754		pr_err("sum of lens %u != %u for tid %llu\n", data_len,
3755		       le32_to_cpu(msg->hdr.data_len), req->r_tid);
3756		goto fail_request;
3757	}
3758	dout("%s req %p tid %llu result %d data_len %u\n", __func__,
3759	     req, req->r_tid, m.result, data_len);
3760
3761	/*
3762	 * Since we only ever request ONDISK, we should only ever get
3763	 * one (type of) reply back.
3764	 */
3765	WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
 
3766	req->r_result = m.result ?: data_len;
3767	finish_request(req);
3768	mutex_unlock(&osd->lock);
3769	up_read(&osdc->lock);
3770
3771	__complete_request(req);
3772	return;
3773
3774fail_request:
3775	complete_request(req, -EIO);
3776out_unlock_session:
3777	mutex_unlock(&osd->lock);
3778out_unlock_osdc:
3779	up_read(&osdc->lock);
3780}
3781
3782static void set_pool_was_full(struct ceph_osd_client *osdc)
3783{
3784	struct rb_node *n;
3785
3786	for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
3787		struct ceph_pg_pool_info *pi =
3788		    rb_entry(n, struct ceph_pg_pool_info, node);
3789
3790		pi->was_full = __pool_full(pi);
3791	}
3792}
3793
3794static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
3795{
3796	struct ceph_pg_pool_info *pi;
3797
3798	pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
3799	if (!pi)
3800		return false;
3801
3802	return pi->was_full && !__pool_full(pi);
3803}
3804
3805static enum calc_target_result
3806recalc_linger_target(struct ceph_osd_linger_request *lreq)
3807{
3808	struct ceph_osd_client *osdc = lreq->osdc;
3809	enum calc_target_result ct_res;
3810
3811	ct_res = calc_target(osdc, &lreq->t, true);
3812	if (ct_res == CALC_TARGET_NEED_RESEND) {
3813		struct ceph_osd *osd;
3814
3815		osd = lookup_create_osd(osdc, lreq->t.osd, true);
3816		if (osd != lreq->osd) {
3817			unlink_linger(lreq->osd, lreq);
3818			link_linger(osd, lreq);
3819		}
3820	}
3821
3822	return ct_res;
3823}
3824
3825/*
3826 * Requeue requests whose mapping to an OSD has changed.
3827 */
3828static void scan_requests(struct ceph_osd *osd,
3829			  bool force_resend,
3830			  bool cleared_full,
3831			  bool check_pool_cleared_full,
3832			  struct rb_root *need_resend,
3833			  struct list_head *need_resend_linger)
3834{
3835	struct ceph_osd_client *osdc = osd->o_osdc;
3836	struct rb_node *n;
3837	bool force_resend_writes;
3838
3839	for (n = rb_first(&osd->o_linger_requests); n; ) {
3840		struct ceph_osd_linger_request *lreq =
3841		    rb_entry(n, struct ceph_osd_linger_request, node);
3842		enum calc_target_result ct_res;
3843
3844		n = rb_next(n); /* recalc_linger_target() */
3845
3846		dout("%s lreq %p linger_id %llu\n", __func__, lreq,
3847		     lreq->linger_id);
3848		ct_res = recalc_linger_target(lreq);
3849		switch (ct_res) {
3850		case CALC_TARGET_NO_ACTION:
3851			force_resend_writes = cleared_full ||
3852			    (check_pool_cleared_full &&
3853			     pool_cleared_full(osdc, lreq->t.base_oloc.pool));
3854			if (!force_resend && !force_resend_writes)
3855				break;
3856
3857			fallthrough;
3858		case CALC_TARGET_NEED_RESEND:
3859			cancel_linger_map_check(lreq);
3860			/*
3861			 * scan_requests() for the previous epoch(s)
3862			 * may have already added it to the list, since
3863			 * it's not unlinked here.
3864			 */
3865			if (list_empty(&lreq->scan_item))
3866				list_add_tail(&lreq->scan_item, need_resend_linger);
3867			break;
3868		case CALC_TARGET_POOL_DNE:
3869			list_del_init(&lreq->scan_item);
3870			check_linger_pool_dne(lreq);
3871			break;
3872		}
3873	}
3874
3875	for (n = rb_first(&osd->o_requests); n; ) {
3876		struct ceph_osd_request *req =
3877		    rb_entry(n, struct ceph_osd_request, r_node);
3878		enum calc_target_result ct_res;
3879
3880		n = rb_next(n); /* unlink_request(), check_pool_dne() */
3881
3882		dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3883		ct_res = calc_target(osdc, &req->r_t, false);
3884		switch (ct_res) {
3885		case CALC_TARGET_NO_ACTION:
3886			force_resend_writes = cleared_full ||
3887			    (check_pool_cleared_full &&
3888			     pool_cleared_full(osdc, req->r_t.base_oloc.pool));
3889			if (!force_resend &&
3890			    (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
3891			     !force_resend_writes))
3892				break;
3893
3894			fallthrough;
3895		case CALC_TARGET_NEED_RESEND:
3896			cancel_map_check(req);
3897			unlink_request(osd, req);
3898			insert_request(need_resend, req);
3899			break;
3900		case CALC_TARGET_POOL_DNE:
3901			check_pool_dne(req);
3902			break;
3903		}
3904	}
3905}
3906
3907static int handle_one_map(struct ceph_osd_client *osdc,
3908			  void *p, void *end, bool incremental,
3909			  struct rb_root *need_resend,
3910			  struct list_head *need_resend_linger)
3911{
3912	struct ceph_osdmap *newmap;
3913	struct rb_node *n;
3914	bool skipped_map = false;
3915	bool was_full;
3916
3917	was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3918	set_pool_was_full(osdc);
3919
3920	if (incremental)
3921		newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
 
 
3922	else
3923		newmap = ceph_osdmap_decode(&p, end);
3924	if (IS_ERR(newmap))
3925		return PTR_ERR(newmap);
3926
3927	if (newmap != osdc->osdmap) {
3928		/*
3929		 * Preserve ->was_full before destroying the old map.
3930		 * For pools that weren't in the old map, ->was_full
3931		 * should be false.
3932		 */
3933		for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
3934			struct ceph_pg_pool_info *pi =
3935			    rb_entry(n, struct ceph_pg_pool_info, node);
3936			struct ceph_pg_pool_info *old_pi;
3937
3938			old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
3939			if (old_pi)
3940				pi->was_full = old_pi->was_full;
3941			else
3942				WARN_ON(pi->was_full);
3943		}
3944
3945		if (osdc->osdmap->epoch &&
3946		    osdc->osdmap->epoch + 1 < newmap->epoch) {
3947			WARN_ON(incremental);
3948			skipped_map = true;
3949		}
3950
3951		ceph_osdmap_destroy(osdc->osdmap);
3952		osdc->osdmap = newmap;
3953	}
3954
3955	was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3956	scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
3957		      need_resend, need_resend_linger);
3958
3959	for (n = rb_first(&osdc->osds); n; ) {
3960		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
3961
3962		n = rb_next(n); /* close_osd() */
3963
3964		scan_requests(osd, skipped_map, was_full, true, need_resend,
3965			      need_resend_linger);
3966		if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
3967		    memcmp(&osd->o_con.peer_addr,
3968			   ceph_osd_addr(osdc->osdmap, osd->o_osd),
3969			   sizeof(struct ceph_entity_addr)))
3970			close_osd(osd);
3971	}
3972
3973	return 0;
3974}
3975
3976static void kick_requests(struct ceph_osd_client *osdc,
3977			  struct rb_root *need_resend,
3978			  struct list_head *need_resend_linger)
3979{
3980	struct ceph_osd_linger_request *lreq, *nlreq;
3981	enum calc_target_result ct_res;
3982	struct rb_node *n;
3983
3984	/* make sure need_resend targets reflect latest map */
3985	for (n = rb_first(need_resend); n; ) {
3986		struct ceph_osd_request *req =
3987		    rb_entry(n, struct ceph_osd_request, r_node);
3988
3989		n = rb_next(n);
3990
3991		if (req->r_t.epoch < osdc->osdmap->epoch) {
3992			ct_res = calc_target(osdc, &req->r_t, false);
3993			if (ct_res == CALC_TARGET_POOL_DNE) {
3994				erase_request(need_resend, req);
3995				check_pool_dne(req);
3996			}
3997		}
3998	}
3999
4000	for (n = rb_first(need_resend); n; ) {
4001		struct ceph_osd_request *req =
4002		    rb_entry(n, struct ceph_osd_request, r_node);
4003		struct ceph_osd *osd;
4004
4005		n = rb_next(n);
4006		erase_request(need_resend, req); /* before link_request() */
4007
4008		osd = lookup_create_osd(osdc, req->r_t.osd, true);
4009		link_request(osd, req);
4010		if (!req->r_linger) {
4011			if (!osd_homeless(osd) && !req->r_t.paused)
4012				send_request(req);
4013		} else {
4014			cancel_linger_request(req);
4015		}
4016	}
4017
4018	list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
4019		if (!osd_homeless(lreq->osd))
4020			send_linger(lreq);
4021
4022		list_del_init(&lreq->scan_item);
4023	}
4024}
4025
4026/*
4027 * Process updated osd map.
4028 *
4029 * The message contains any number of incremental and full maps, normally
4030 * indicating some sort of topology change in the cluster.  Kick requests
4031 * off to different OSDs as needed.
4032 */
4033void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
4034{
4035	void *p = msg->front.iov_base;
4036	void *const end = p + msg->front.iov_len;
4037	u32 nr_maps, maplen;
4038	u32 epoch;
4039	struct ceph_fsid fsid;
4040	struct rb_root need_resend = RB_ROOT;
4041	LIST_HEAD(need_resend_linger);
4042	bool handled_incremental = false;
4043	bool was_pauserd, was_pausewr;
4044	bool pauserd, pausewr;
4045	int err;
4046
4047	dout("%s have %u\n", __func__, osdc->osdmap->epoch);
4048	down_write(&osdc->lock);
4049
4050	/* verify fsid */
4051	ceph_decode_need(&p, end, sizeof(fsid), bad);
4052	ceph_decode_copy(&p, &fsid, sizeof(fsid));
4053	if (ceph_check_fsid(osdc->client, &fsid) < 0)
4054		goto bad;
4055
4056	was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4057	was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4058		      ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4059		      have_pool_full(osdc);
4060
4061	/* incremental maps */
4062	ceph_decode_32_safe(&p, end, nr_maps, bad);
4063	dout(" %d inc maps\n", nr_maps);
4064	while (nr_maps > 0) {
4065		ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4066		epoch = ceph_decode_32(&p);
4067		maplen = ceph_decode_32(&p);
4068		ceph_decode_need(&p, end, maplen, bad);
4069		if (osdc->osdmap->epoch &&
4070		    osdc->osdmap->epoch + 1 == epoch) {
4071			dout("applying incremental map %u len %d\n",
4072			     epoch, maplen);
4073			err = handle_one_map(osdc, p, p + maplen, true,
4074					     &need_resend, &need_resend_linger);
4075			if (err)
4076				goto bad;
4077			handled_incremental = true;
4078		} else {
4079			dout("ignoring incremental map %u len %d\n",
4080			     epoch, maplen);
4081		}
4082		p += maplen;
4083		nr_maps--;
4084	}
4085	if (handled_incremental)
4086		goto done;
4087
4088	/* full maps */
4089	ceph_decode_32_safe(&p, end, nr_maps, bad);
4090	dout(" %d full maps\n", nr_maps);
4091	while (nr_maps) {
4092		ceph_decode_need(&p, end, 2*sizeof(u32), bad);
4093		epoch = ceph_decode_32(&p);
4094		maplen = ceph_decode_32(&p);
4095		ceph_decode_need(&p, end, maplen, bad);
4096		if (nr_maps > 1) {
4097			dout("skipping non-latest full map %u len %d\n",
4098			     epoch, maplen);
4099		} else if (osdc->osdmap->epoch >= epoch) {
4100			dout("skipping full map %u len %d, "
4101			     "older than our %u\n", epoch, maplen,
4102			     osdc->osdmap->epoch);
4103		} else {
4104			dout("taking full map %u len %d\n", epoch, maplen);
4105			err = handle_one_map(osdc, p, p + maplen, false,
4106					     &need_resend, &need_resend_linger);
4107			if (err)
4108				goto bad;
4109		}
4110		p += maplen;
4111		nr_maps--;
4112	}
4113
4114done:
4115	/*
4116	 * subscribe to subsequent osdmap updates if full to ensure
4117	 * we find out when we are no longer full and stop returning
4118	 * ENOSPC.
4119	 */
4120	pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
4121	pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
4122		  ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
4123		  have_pool_full(osdc);
4124	if (was_pauserd || was_pausewr || pauserd || pausewr ||
4125	    osdc->osdmap->epoch < osdc->epoch_barrier)
4126		maybe_request_map(osdc);
4127
4128	kick_requests(osdc, &need_resend, &need_resend_linger);
4129
4130	ceph_osdc_abort_on_full(osdc);
4131	ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
4132			  osdc->osdmap->epoch);
4133	up_write(&osdc->lock);
4134	wake_up_all(&osdc->client->auth_wq);
4135	return;
4136
4137bad:
4138	pr_err("osdc handle_map corrupt msg\n");
4139	ceph_msg_dump(msg);
4140	up_write(&osdc->lock);
4141}
4142
4143/*
4144 * Resubmit requests pending on the given osd.
4145 */
4146static void kick_osd_requests(struct ceph_osd *osd)
4147{
4148	struct rb_node *n;
4149
4150	clear_backoffs(osd);
4151
4152	for (n = rb_first(&osd->o_requests); n; ) {
4153		struct ceph_osd_request *req =
4154		    rb_entry(n, struct ceph_osd_request, r_node);
4155
4156		n = rb_next(n); /* cancel_linger_request() */
4157
4158		if (!req->r_linger) {
4159			if (!req->r_t.paused)
4160				send_request(req);
4161		} else {
4162			cancel_linger_request(req);
4163		}
4164	}
4165	for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
4166		struct ceph_osd_linger_request *lreq =
4167		    rb_entry(n, struct ceph_osd_linger_request, node);
4168
4169		send_linger(lreq);
4170	}
4171}
4172
4173/*
4174 * If the osd connection drops, we need to resubmit all requests.
4175 */
4176static void osd_fault(struct ceph_connection *con)
4177{
4178	struct ceph_osd *osd = con->private;
4179	struct ceph_osd_client *osdc = osd->o_osdc;
4180
4181	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
4182
4183	down_write(&osdc->lock);
4184	if (!osd_registered(osd)) {
4185		dout("%s osd%d unknown\n", __func__, osd->o_osd);
4186		goto out_unlock;
4187	}
4188
4189	if (!reopen_osd(osd))
4190		kick_osd_requests(osd);
4191	maybe_request_map(osdc);
4192
4193out_unlock:
4194	up_write(&osdc->lock);
4195}
4196
4197struct MOSDBackoff {
4198	struct ceph_spg spgid;
4199	u32 map_epoch;
4200	u8 op;
4201	u64 id;
4202	struct ceph_hobject_id *begin;
4203	struct ceph_hobject_id *end;
4204};
4205
4206static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
4207{
4208	void *p = msg->front.iov_base;
4209	void *const end = p + msg->front.iov_len;
4210	u8 struct_v;
4211	u32 struct_len;
4212	int ret;
4213
4214	ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
4215	if (ret)
4216		return ret;
4217
4218	ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
4219	if (ret)
4220		return ret;
4221
4222	ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
4223	ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
4224	ceph_decode_8_safe(&p, end, m->op, e_inval);
4225	ceph_decode_64_safe(&p, end, m->id, e_inval);
4226
4227	m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
4228	if (!m->begin)
4229		return -ENOMEM;
4230
4231	ret = decode_hoid(&p, end, m->begin);
4232	if (ret) {
4233		free_hoid(m->begin);
4234		return ret;
4235	}
4236
4237	m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
4238	if (!m->end) {
4239		free_hoid(m->begin);
4240		return -ENOMEM;
4241	}
4242
4243	ret = decode_hoid(&p, end, m->end);
4244	if (ret) {
4245		free_hoid(m->begin);
4246		free_hoid(m->end);
4247		return ret;
4248	}
4249
4250	return 0;
4251
4252e_inval:
4253	return -EINVAL;
4254}
4255
4256static struct ceph_msg *create_backoff_message(
4257				const struct ceph_osd_backoff *backoff,
4258				u32 map_epoch)
4259{
4260	struct ceph_msg *msg;
4261	void *p, *end;
4262	int msg_size;
4263
4264	msg_size = CEPH_ENCODING_START_BLK_LEN +
4265			CEPH_PGID_ENCODING_LEN + 1; /* spgid */
4266	msg_size += 4 + 1 + 8; /* map_epoch, op, id */
4267	msg_size += CEPH_ENCODING_START_BLK_LEN +
4268			hoid_encoding_size(backoff->begin);
4269	msg_size += CEPH_ENCODING_START_BLK_LEN +
4270			hoid_encoding_size(backoff->end);
4271
4272	msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
4273	if (!msg)
4274		return NULL;
4275
4276	p = msg->front.iov_base;
4277	end = p + msg->front_alloc_len;
4278
4279	encode_spgid(&p, &backoff->spgid);
4280	ceph_encode_32(&p, map_epoch);
4281	ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
4282	ceph_encode_64(&p, backoff->id);
4283	encode_hoid(&p, end, backoff->begin);
4284	encode_hoid(&p, end, backoff->end);
4285	BUG_ON(p != end);
4286
4287	msg->front.iov_len = p - msg->front.iov_base;
4288	msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
4289	msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
4290
4291	return msg;
4292}
4293
4294static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
4295{
4296	struct ceph_spg_mapping *spg;
4297	struct ceph_osd_backoff *backoff;
4298	struct ceph_msg *msg;
4299
4300	dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4301	     m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4302
4303	spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
4304	if (!spg) {
4305		spg = alloc_spg_mapping();
4306		if (!spg) {
4307			pr_err("%s failed to allocate spg\n", __func__);
4308			return;
4309		}
4310		spg->spgid = m->spgid; /* struct */
4311		insert_spg_mapping(&osd->o_backoff_mappings, spg);
4312	}
4313
4314	backoff = alloc_backoff();
4315	if (!backoff) {
4316		pr_err("%s failed to allocate backoff\n", __func__);
4317		return;
4318	}
4319	backoff->spgid = m->spgid; /* struct */
4320	backoff->id = m->id;
4321	backoff->begin = m->begin;
4322	m->begin = NULL; /* backoff now owns this */
4323	backoff->end = m->end;
4324	m->end = NULL;   /* ditto */
4325
4326	insert_backoff(&spg->backoffs, backoff);
4327	insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4328
4329	/*
4330	 * Ack with original backoff's epoch so that the OSD can
4331	 * discard this if there was a PG split.
4332	 */
4333	msg = create_backoff_message(backoff, m->map_epoch);
4334	if (!msg) {
4335		pr_err("%s failed to allocate msg\n", __func__);
4336		return;
4337	}
4338	ceph_con_send(&osd->o_con, msg);
4339}
4340
4341static bool target_contained_by(const struct ceph_osd_request_target *t,
4342				const struct ceph_hobject_id *begin,
4343				const struct ceph_hobject_id *end)
4344{
4345	struct ceph_hobject_id hoid;
4346	int cmp;
4347
4348	hoid_fill_from_target(&hoid, t);
4349	cmp = hoid_compare(&hoid, begin);
4350	return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
4351}
4352
4353static void handle_backoff_unblock(struct ceph_osd *osd,
4354				   const struct MOSDBackoff *m)
4355{
4356	struct ceph_spg_mapping *spg;
4357	struct ceph_osd_backoff *backoff;
4358	struct rb_node *n;
4359
4360	dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
4361	     m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);
4362
4363	backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
4364	if (!backoff) {
4365		pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
4366		       __func__, osd->o_osd, m->spgid.pgid.pool,
4367		       m->spgid.pgid.seed, m->spgid.shard, m->id);
4368		return;
4369	}
4370
4371	if (hoid_compare(backoff->begin, m->begin) &&
4372	    hoid_compare(backoff->end, m->end)) {
4373		pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
4374		       __func__, osd->o_osd, m->spgid.pgid.pool,
4375		       m->spgid.pgid.seed, m->spgid.shard, m->id);
4376		/* unblock it anyway... */
4377	}
4378
4379	spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
4380	BUG_ON(!spg);
4381
4382	erase_backoff(&spg->backoffs, backoff);
4383	erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
4384	free_backoff(backoff);
4385
4386	if (RB_EMPTY_ROOT(&spg->backoffs)) {
4387		erase_spg_mapping(&osd->o_backoff_mappings, spg);
4388		free_spg_mapping(spg);
4389	}
4390
4391	for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
4392		struct ceph_osd_request *req =
4393		    rb_entry(n, struct ceph_osd_request, r_node);
4394
4395		if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
4396			/*
4397			 * Match against @m, not @backoff -- the PG may
4398			 * have split on the OSD.
4399			 */
4400			if (target_contained_by(&req->r_t, m->begin, m->end)) {
4401				/*
4402				 * If no other installed backoff applies,
4403				 * resend.
4404				 */
4405				send_request(req);
4406			}
4407		}
4408	}
4409}
4410
4411static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
4412{
4413	struct ceph_osd_client *osdc = osd->o_osdc;
4414	struct MOSDBackoff m;
4415	int ret;
4416
4417	down_read(&osdc->lock);
4418	if (!osd_registered(osd)) {
4419		dout("%s osd%d unknown\n", __func__, osd->o_osd);
4420		up_read(&osdc->lock);
4421		return;
4422	}
4423	WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
4424
4425	mutex_lock(&osd->lock);
4426	ret = decode_MOSDBackoff(msg, &m);
4427	if (ret) {
4428		pr_err("failed to decode MOSDBackoff: %d\n", ret);
4429		ceph_msg_dump(msg);
4430		goto out_unlock;
4431	}
4432
4433	switch (m.op) {
4434	case CEPH_OSD_BACKOFF_OP_BLOCK:
4435		handle_backoff_block(osd, &m);
4436		break;
4437	case CEPH_OSD_BACKOFF_OP_UNBLOCK:
4438		handle_backoff_unblock(osd, &m);
4439		break;
4440	default:
4441		pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
4442	}
4443
4444	free_hoid(m.begin);
4445	free_hoid(m.end);
4446
4447out_unlock:
4448	mutex_unlock(&osd->lock);
4449	up_read(&osdc->lock);
4450}
4451
4452/*
4453 * Process osd watch notifications
4454 */
4455static void handle_watch_notify(struct ceph_osd_client *osdc,
4456				struct ceph_msg *msg)
4457{
4458	void *p = msg->front.iov_base;
4459	void *const end = p + msg->front.iov_len;
4460	struct ceph_osd_linger_request *lreq;
4461	struct linger_work *lwork;
4462	u8 proto_ver, opcode;
4463	u64 cookie, notify_id;
4464	u64 notifier_id = 0;
4465	s32 return_code = 0;
4466	void *payload = NULL;
4467	u32 payload_len = 0;
4468
4469	ceph_decode_8_safe(&p, end, proto_ver, bad);
4470	ceph_decode_8_safe(&p, end, opcode, bad);
4471	ceph_decode_64_safe(&p, end, cookie, bad);
4472	p += 8; /* skip ver */
4473	ceph_decode_64_safe(&p, end, notify_id, bad);
4474
4475	if (proto_ver >= 1) {
4476		ceph_decode_32_safe(&p, end, payload_len, bad);
4477		ceph_decode_need(&p, end, payload_len, bad);
4478		payload = p;
4479		p += payload_len;
4480	}
4481
4482	if (le16_to_cpu(msg->hdr.version) >= 2)
4483		ceph_decode_32_safe(&p, end, return_code, bad);
4484
4485	if (le16_to_cpu(msg->hdr.version) >= 3)
4486		ceph_decode_64_safe(&p, end, notifier_id, bad);
4487
4488	down_read(&osdc->lock);
4489	lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
4490	if (!lreq) {
4491		dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
4492		     cookie);
4493		goto out_unlock_osdc;
4494	}
4495
4496	mutex_lock(&lreq->lock);
4497	dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
4498	     opcode, cookie, lreq, lreq->is_watch);
4499	if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
4500		if (!lreq->last_error) {
4501			lreq->last_error = -ENOTCONN;
4502			queue_watch_error(lreq);
4503		}
4504	} else if (!lreq->is_watch) {
4505		/* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
4506		if (lreq->notify_id && lreq->notify_id != notify_id) {
4507			dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
4508			     lreq->notify_id, notify_id);
4509		} else if (!completion_done(&lreq->notify_finish_wait)) {
4510			struct ceph_msg_data *data =
4511			    msg->num_data_items ? &msg->data[0] : NULL;
4512
4513			if (data) {
4514				if (lreq->preply_pages) {
4515					WARN_ON(data->type !=
4516							CEPH_MSG_DATA_PAGES);
4517					*lreq->preply_pages = data->pages;
4518					*lreq->preply_len = data->length;
4519					data->own_pages = false;
4520				}
4521			}
4522			lreq->notify_finish_error = return_code;
4523			complete_all(&lreq->notify_finish_wait);
4524		}
4525	} else {
4526		/* CEPH_WATCH_EVENT_NOTIFY */
4527		lwork = lwork_alloc(lreq, do_watch_notify);
4528		if (!lwork) {
4529			pr_err("failed to allocate notify-lwork\n");
4530			goto out_unlock_lreq;
4531		}
4532
4533		lwork->notify.notify_id = notify_id;
4534		lwork->notify.notifier_id = notifier_id;
4535		lwork->notify.payload = payload;
4536		lwork->notify.payload_len = payload_len;
4537		lwork->notify.msg = ceph_msg_get(msg);
4538		lwork_queue(lwork);
4539	}
4540
4541out_unlock_lreq:
4542	mutex_unlock(&lreq->lock);
4543out_unlock_osdc:
4544	up_read(&osdc->lock);
4545	return;
4546
4547bad:
4548	pr_err("osdc handle_watch_notify corrupt msg\n");
4549}
4550
4551/*
4552 * Register request, send initial attempt.
4553 */
4554int ceph_osdc_start_request(struct ceph_osd_client *osdc,
4555			    struct ceph_osd_request *req,
4556			    bool nofail)
4557{
4558	down_read(&osdc->lock);
4559	submit_request(req, false);
4560	up_read(&osdc->lock);
4561
4562	return 0;
4563}
4564EXPORT_SYMBOL(ceph_osdc_start_request);
4565
4566/*
4567 * Unregister a registered request.  The request is not completed:
4568 * ->r_result isn't set and __complete_request() isn't called.
 
 
 
 
 
4569 */
4570void ceph_osdc_cancel_request(struct ceph_osd_request *req)
4571{
4572	struct ceph_osd_client *osdc = req->r_osdc;
4573
4574	down_write(&osdc->lock);
4575	if (req->r_osd)
4576		cancel_request(req);
4577	up_write(&osdc->lock);
4578}
4579EXPORT_SYMBOL(ceph_osdc_cancel_request);
4580
4581/*
4582 * @timeout: in jiffies, 0 means "wait forever"
4583 */
4584static int wait_request_timeout(struct ceph_osd_request *req,
4585				unsigned long timeout)
4586{
4587	long left;
4588
4589	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4590	left = wait_for_completion_killable_timeout(&req->r_completion,
4591						ceph_timeout_jiffies(timeout));
4592	if (left <= 0) {
4593		left = left ?: -ETIMEDOUT;
4594		ceph_osdc_cancel_request(req);
4595	} else {
4596		left = req->r_result; /* completed */
4597	}
4598
4599	return left;
4600}
4601
4602/*
4603 * wait for a request to complete
4604 */
4605int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
4606			   struct ceph_osd_request *req)
4607{
4608	return wait_request_timeout(req, 0);
4609}
4610EXPORT_SYMBOL(ceph_osdc_wait_request);
4611
4612/*
4613 * sync - wait for all in-flight requests to flush.  avoid starvation.
4614 */
4615void ceph_osdc_sync(struct ceph_osd_client *osdc)
4616{
4617	struct rb_node *n, *p;
4618	u64 last_tid = atomic64_read(&osdc->last_tid);
4619
4620again:
4621	down_read(&osdc->lock);
4622	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
4623		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
4624
4625		mutex_lock(&osd->lock);
4626		for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
4627			struct ceph_osd_request *req =
4628			    rb_entry(p, struct ceph_osd_request, r_node);
4629
4630			if (req->r_tid > last_tid)
4631				break;
4632
4633			if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
4634				continue;
4635
4636			ceph_osdc_get_request(req);
4637			mutex_unlock(&osd->lock);
4638			up_read(&osdc->lock);
4639			dout("%s waiting on req %p tid %llu last_tid %llu\n",
4640			     __func__, req, req->r_tid, last_tid);
4641			wait_for_completion(&req->r_completion);
4642			ceph_osdc_put_request(req);
4643			goto again;
4644		}
4645
4646		mutex_unlock(&osd->lock);
4647	}
4648
4649	up_read(&osdc->lock);
4650	dout("%s done last_tid %llu\n", __func__, last_tid);
4651}
4652EXPORT_SYMBOL(ceph_osdc_sync);
4653
4654static struct ceph_osd_request *
4655alloc_linger_request(struct ceph_osd_linger_request *lreq)
4656{
4657	struct ceph_osd_request *req;
4658
4659	req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
4660	if (!req)
4661		return NULL;
4662
4663	ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4664	ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4665	return req;
4666}
4667
4668static struct ceph_osd_request *
4669alloc_watch_request(struct ceph_osd_linger_request *lreq, u8 watch_opcode)
4670{
4671	struct ceph_osd_request *req;
4672
4673	req = alloc_linger_request(lreq);
4674	if (!req)
4675		return NULL;
4676
4677	/*
4678	 * Pass 0 for cookie because we don't know it yet, it will be
4679	 * filled in by linger_submit().
4680	 */
4681	osd_req_op_watch_init(req, 0, 0, watch_opcode);
4682
4683	if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
4684		ceph_osdc_put_request(req);
4685		return NULL;
4686	}
4687
4688	return req;
4689}
4690
4691/*
4692 * Returns a handle, caller owns a ref.
4693 */
4694struct ceph_osd_linger_request *
4695ceph_osdc_watch(struct ceph_osd_client *osdc,
4696		struct ceph_object_id *oid,
4697		struct ceph_object_locator *oloc,
4698		rados_watchcb2_t wcb,
4699		rados_watcherrcb_t errcb,
4700		void *data)
4701{
4702	struct ceph_osd_linger_request *lreq;
4703	int ret;
4704
4705	lreq = linger_alloc(osdc);
4706	if (!lreq)
4707		return ERR_PTR(-ENOMEM);
4708
4709	lreq->is_watch = true;
4710	lreq->wcb = wcb;
4711	lreq->errcb = errcb;
4712	lreq->data = data;
4713	lreq->watch_valid_thru = jiffies;
4714
4715	ceph_oid_copy(&lreq->t.base_oid, oid);
4716	ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4717	lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4718	ktime_get_real_ts64(&lreq->mtime);
4719
4720	lreq->reg_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_WATCH);
4721	if (!lreq->reg_req) {
4722		ret = -ENOMEM;
4723		goto err_put_lreq;
4724	}
4725
4726	lreq->ping_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_PING);
4727	if (!lreq->ping_req) {
4728		ret = -ENOMEM;
4729		goto err_put_lreq;
4730	}
4731
4732	linger_submit(lreq);
4733	ret = linger_reg_commit_wait(lreq);
4734	if (ret) {
4735		linger_cancel(lreq);
4736		goto err_put_lreq;
4737	}
4738
4739	return lreq;
4740
4741err_put_lreq:
4742	linger_put(lreq);
4743	return ERR_PTR(ret);
4744}
4745EXPORT_SYMBOL(ceph_osdc_watch);
4746
4747/*
4748 * Releases a ref.
4749 *
4750 * Times out after mount_timeout to preserve rbd unmap behaviour
4751 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
4752 * with mount_timeout").
4753 */
4754int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
4755		      struct ceph_osd_linger_request *lreq)
4756{
4757	struct ceph_options *opts = osdc->client->options;
4758	struct ceph_osd_request *req;
4759	int ret;
4760
4761	req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4762	if (!req)
4763		return -ENOMEM;
4764
4765	ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
4766	ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4767	req->r_flags = CEPH_OSD_FLAG_WRITE;
4768	ktime_get_real_ts64(&req->r_mtime);
4769	osd_req_op_watch_init(req, 0, lreq->linger_id,
4770			      CEPH_OSD_WATCH_OP_UNWATCH);
4771
4772	ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4773	if (ret)
4774		goto out_put_req;
4775
4776	ceph_osdc_start_request(osdc, req, false);
4777	linger_cancel(lreq);
4778	linger_put(lreq);
4779	ret = wait_request_timeout(req, opts->mount_timeout);
4780
4781out_put_req:
4782	ceph_osdc_put_request(req);
4783	return ret;
4784}
4785EXPORT_SYMBOL(ceph_osdc_unwatch);
4786
4787static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
4788				      u64 notify_id, u64 cookie, void *payload,
4789				      u32 payload_len)
4790{
4791	struct ceph_osd_req_op *op;
4792	struct ceph_pagelist *pl;
4793	int ret;
4794
4795	op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
4796
4797	pl = ceph_pagelist_alloc(GFP_NOIO);
4798	if (!pl)
4799		return -ENOMEM;
4800
4801	ret = ceph_pagelist_encode_64(pl, notify_id);
4802	ret |= ceph_pagelist_encode_64(pl, cookie);
4803	if (payload) {
4804		ret |= ceph_pagelist_encode_32(pl, payload_len);
4805		ret |= ceph_pagelist_append(pl, payload, payload_len);
4806	} else {
4807		ret |= ceph_pagelist_encode_32(pl, 0);
4808	}
4809	if (ret) {
4810		ceph_pagelist_release(pl);
4811		return -ENOMEM;
4812	}
4813
4814	ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
4815	op->indata_len = pl->length;
4816	return 0;
4817}
4818
4819int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
4820			 struct ceph_object_id *oid,
4821			 struct ceph_object_locator *oloc,
4822			 u64 notify_id,
4823			 u64 cookie,
4824			 void *payload,
4825			 u32 payload_len)
4826{
4827	struct ceph_osd_request *req;
4828	int ret;
4829
4830	req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
4831	if (!req)
4832		return -ENOMEM;
4833
4834	ceph_oid_copy(&req->r_base_oid, oid);
4835	ceph_oloc_copy(&req->r_base_oloc, oloc);
4836	req->r_flags = CEPH_OSD_FLAG_READ;
4837
4838	ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
4839					 payload_len);
4840	if (ret)
4841		goto out_put_req;
4842
4843	ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
4844	if (ret)
4845		goto out_put_req;
4846
4847	ceph_osdc_start_request(osdc, req, false);
4848	ret = ceph_osdc_wait_request(osdc, req);
4849
4850out_put_req:
4851	ceph_osdc_put_request(req);
4852	return ret;
4853}
4854EXPORT_SYMBOL(ceph_osdc_notify_ack);
4855
4856static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
4857				  u64 cookie, u32 prot_ver, u32 timeout,
4858				  void *payload, u32 payload_len)
4859{
4860	struct ceph_osd_req_op *op;
4861	struct ceph_pagelist *pl;
4862	int ret;
4863
4864	op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
4865	op->notify.cookie = cookie;
4866
4867	pl = ceph_pagelist_alloc(GFP_NOIO);
4868	if (!pl)
4869		return -ENOMEM;
4870
4871	ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
4872	ret |= ceph_pagelist_encode_32(pl, timeout);
4873	ret |= ceph_pagelist_encode_32(pl, payload_len);
4874	ret |= ceph_pagelist_append(pl, payload, payload_len);
4875	if (ret) {
4876		ceph_pagelist_release(pl);
4877		return -ENOMEM;
4878	}
4879
4880	ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
4881	op->indata_len = pl->length;
4882	return 0;
4883}
4884
4885/*
4886 * @timeout: in seconds
4887 *
4888 * @preply_{pages,len} are initialized both on success and error.
4889 * The caller is responsible for:
4890 *
4891 *     ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
4892 */
4893int ceph_osdc_notify(struct ceph_osd_client *osdc,
4894		     struct ceph_object_id *oid,
4895		     struct ceph_object_locator *oloc,
4896		     void *payload,
4897		     u32 payload_len,
4898		     u32 timeout,
4899		     struct page ***preply_pages,
4900		     size_t *preply_len)
4901{
4902	struct ceph_osd_linger_request *lreq;
4903	struct page **pages;
4904	int ret;
4905
4906	WARN_ON(!timeout);
4907	if (preply_pages) {
4908		*preply_pages = NULL;
4909		*preply_len = 0;
4910	}
4911
4912	lreq = linger_alloc(osdc);
4913	if (!lreq)
4914		return -ENOMEM;
4915
4916	lreq->preply_pages = preply_pages;
4917	lreq->preply_len = preply_len;
4918
4919	ceph_oid_copy(&lreq->t.base_oid, oid);
4920	ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4921	lreq->t.flags = CEPH_OSD_FLAG_READ;
4922
4923	lreq->reg_req = alloc_linger_request(lreq);
4924	if (!lreq->reg_req) {
4925		ret = -ENOMEM;
4926		goto out_put_lreq;
4927	}
4928
4929	/*
4930	 * Pass 0 for cookie because we don't know it yet, it will be
4931	 * filled in by linger_submit().
4932	 */
4933	ret = osd_req_op_notify_init(lreq->reg_req, 0, 0, 1, timeout,
4934				     payload, payload_len);
4935	if (ret)
4936		goto out_put_lreq;
 
4937
4938	/* for notify_id */
4939	pages = ceph_alloc_page_vector(1, GFP_NOIO);
4940	if (IS_ERR(pages)) {
4941		ret = PTR_ERR(pages);
 
4942		goto out_put_lreq;
4943	}
4944	ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
4945						 response_data),
4946				 pages, PAGE_SIZE, 0, false, true);
4947
4948	ret = ceph_osdc_alloc_messages(lreq->reg_req, GFP_NOIO);
4949	if (ret)
4950		goto out_put_lreq;
 
 
 
4951
4952	linger_submit(lreq);
4953	ret = linger_reg_commit_wait(lreq);
4954	if (!ret)
4955		ret = linger_notify_finish_wait(lreq);
 
4956	else
4957		dout("lreq %p failed to initiate notify %d\n", lreq, ret);
4958
4959	linger_cancel(lreq);
4960out_put_lreq:
4961	linger_put(lreq);
4962	return ret;
4963}
4964EXPORT_SYMBOL(ceph_osdc_notify);
4965
4966/*
4967 * Return the number of milliseconds since the watch was last
4968 * confirmed, or an error.  If there is an error, the watch is no
4969 * longer valid, and should be destroyed with ceph_osdc_unwatch().
4970 */
4971int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
4972			  struct ceph_osd_linger_request *lreq)
4973{
4974	unsigned long stamp, age;
4975	int ret;
4976
4977	down_read(&osdc->lock);
4978	mutex_lock(&lreq->lock);
4979	stamp = lreq->watch_valid_thru;
4980	if (!list_empty(&lreq->pending_lworks)) {
4981		struct linger_work *lwork =
4982		    list_first_entry(&lreq->pending_lworks,
4983				     struct linger_work,
4984				     pending_item);
4985
4986		if (time_before(lwork->queued_stamp, stamp))
4987			stamp = lwork->queued_stamp;
4988	}
4989	age = jiffies - stamp;
4990	dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
4991	     lreq, lreq->linger_id, age, lreq->last_error);
4992	/* we are truncating to msecs, so return a safe upper bound */
4993	ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
4994
4995	mutex_unlock(&lreq->lock);
4996	up_read(&osdc->lock);
4997	return ret;
4998}
4999
5000static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
5001{
5002	u8 struct_v;
5003	u32 struct_len;
5004	int ret;
5005
5006	ret = ceph_start_decoding(p, end, 2, "watch_item_t",
5007				  &struct_v, &struct_len);
5008	if (ret)
5009		goto bad;
5010
5011	ret = -EINVAL;
5012	ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad);
5013	ceph_decode_64_safe(p, end, item->cookie, bad);
5014	ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */
5015
5016	if (struct_v >= 2) {
5017		ret = ceph_decode_entity_addr(p, end, &item->addr);
5018		if (ret)
5019			goto bad;
5020	} else {
5021		ret = 0;
5022	}
5023
5024	dout("%s %s%llu cookie %llu addr %s\n", __func__,
5025	     ENTITY_NAME(item->name), item->cookie,
5026	     ceph_pr_addr(&item->addr));
5027bad:
5028	return ret;
5029}
5030
5031static int decode_watchers(void **p, void *end,
5032			   struct ceph_watch_item **watchers,
5033			   u32 *num_watchers)
5034{
5035	u8 struct_v;
5036	u32 struct_len;
5037	int i;
5038	int ret;
5039
5040	ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
5041				  &struct_v, &struct_len);
5042	if (ret)
5043		return ret;
5044
5045	*num_watchers = ceph_decode_32(p);
5046	*watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
5047	if (!*watchers)
5048		return -ENOMEM;
5049
5050	for (i = 0; i < *num_watchers; i++) {
5051		ret = decode_watcher(p, end, *watchers + i);
5052		if (ret) {
5053			kfree(*watchers);
5054			return ret;
5055		}
5056	}
5057
5058	return 0;
5059}
5060
5061/*
5062 * On success, the caller is responsible for:
5063 *
5064 *     kfree(watchers);
5065 */
5066int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
5067			    struct ceph_object_id *oid,
5068			    struct ceph_object_locator *oloc,
5069			    struct ceph_watch_item **watchers,
5070			    u32 *num_watchers)
5071{
5072	struct ceph_osd_request *req;
5073	struct page **pages;
5074	int ret;
5075
5076	req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5077	if (!req)
5078		return -ENOMEM;
5079
5080	ceph_oid_copy(&req->r_base_oid, oid);
5081	ceph_oloc_copy(&req->r_base_oloc, oloc);
5082	req->r_flags = CEPH_OSD_FLAG_READ;
5083
5084	pages = ceph_alloc_page_vector(1, GFP_NOIO);
5085	if (IS_ERR(pages)) {
5086		ret = PTR_ERR(pages);
5087		goto out_put_req;
5088	}
5089
5090	osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
5091	ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
5092						 response_data),
5093				 pages, PAGE_SIZE, 0, false, true);
5094
5095	ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5096	if (ret)
5097		goto out_put_req;
5098
5099	ceph_osdc_start_request(osdc, req, false);
5100	ret = ceph_osdc_wait_request(osdc, req);
5101	if (ret >= 0) {
5102		void *p = page_address(pages[0]);
5103		void *const end = p + req->r_ops[0].outdata_len;
5104
5105		ret = decode_watchers(&p, end, watchers, num_watchers);
5106	}
5107
5108out_put_req:
5109	ceph_osdc_put_request(req);
5110	return ret;
5111}
5112EXPORT_SYMBOL(ceph_osdc_list_watchers);
5113
5114/*
5115 * Call all pending notify callbacks - for use after a watch is
5116 * unregistered, to make sure no more callbacks for it will be invoked
5117 */
5118void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
5119{
5120	dout("%s osdc %p\n", __func__, osdc);
5121	flush_workqueue(osdc->notify_wq);
5122}
5123EXPORT_SYMBOL(ceph_osdc_flush_notifies);
5124
5125void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
5126{
5127	down_read(&osdc->lock);
5128	maybe_request_map(osdc);
5129	up_read(&osdc->lock);
5130}
5131EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
5132
5133/*
5134 * Execute an OSD class method on an object.
5135 *
5136 * @flags: CEPH_OSD_FLAG_*
5137 * @resp_len: in/out param for reply length
5138 */
5139int ceph_osdc_call(struct ceph_osd_client *osdc,
5140		   struct ceph_object_id *oid,
5141		   struct ceph_object_locator *oloc,
5142		   const char *class, const char *method,
5143		   unsigned int flags,
5144		   struct page *req_page, size_t req_len,
5145		   struct page **resp_pages, size_t *resp_len)
5146{
5147	struct ceph_osd_request *req;
5148	int ret;
5149
5150	if (req_len > PAGE_SIZE)
5151		return -E2BIG;
5152
5153	req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
5154	if (!req)
5155		return -ENOMEM;
5156
5157	ceph_oid_copy(&req->r_base_oid, oid);
5158	ceph_oloc_copy(&req->r_base_oloc, oloc);
5159	req->r_flags = flags;
5160
5161	ret = osd_req_op_cls_init(req, 0, class, method);
5162	if (ret)
5163		goto out_put_req;
5164
5165	if (req_page)
5166		osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
5167						  0, false, false);
5168	if (resp_pages)
5169		osd_req_op_cls_response_data_pages(req, 0, resp_pages,
5170						   *resp_len, 0, false, false);
5171
5172	ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
5173	if (ret)
5174		goto out_put_req;
5175
5176	ceph_osdc_start_request(osdc, req, false);
5177	ret = ceph_osdc_wait_request(osdc, req);
5178	if (ret >= 0) {
5179		ret = req->r_ops[0].rval;
5180		if (resp_pages)
5181			*resp_len = req->r_ops[0].outdata_len;
5182	}
5183
5184out_put_req:
5185	ceph_osdc_put_request(req);
5186	return ret;
5187}
5188EXPORT_SYMBOL(ceph_osdc_call);
5189
5190/*
5191 * reset all osd connections
5192 */
5193void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc)
5194{
5195	struct rb_node *n;
5196
5197	down_write(&osdc->lock);
5198	for (n = rb_first(&osdc->osds); n; ) {
5199		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
5200
5201		n = rb_next(n);
5202		if (!reopen_osd(osd))
5203			kick_osd_requests(osd);
5204	}
5205	up_write(&osdc->lock);
5206}
5207
5208/*
5209 * init, shutdown
5210 */
5211int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
5212{
5213	int err;
5214
5215	dout("init\n");
5216	osdc->client = client;
5217	init_rwsem(&osdc->lock);
5218	osdc->osds = RB_ROOT;
5219	INIT_LIST_HEAD(&osdc->osd_lru);
5220	spin_lock_init(&osdc->osd_lru_lock);
5221	osd_init(&osdc->homeless_osd);
5222	osdc->homeless_osd.o_osdc = osdc;
5223	osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
5224	osdc->last_linger_id = CEPH_LINGER_ID_START;
5225	osdc->linger_requests = RB_ROOT;
5226	osdc->map_checks = RB_ROOT;
5227	osdc->linger_map_checks = RB_ROOT;
5228	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
5229	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
5230
5231	err = -ENOMEM;
5232	osdc->osdmap = ceph_osdmap_alloc();
5233	if (!osdc->osdmap)
5234		goto out;
5235
5236	osdc->req_mempool = mempool_create_slab_pool(10,
5237						     ceph_osd_request_cache);
5238	if (!osdc->req_mempool)
5239		goto out_map;
5240
5241	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
5242				PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op");
5243	if (err < 0)
5244		goto out_mempool;
5245	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
5246				PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10,
5247				"osd_op_reply");
5248	if (err < 0)
5249		goto out_msgpool;
5250
5251	err = -ENOMEM;
5252	osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
5253	if (!osdc->notify_wq)
5254		goto out_msgpool_reply;
5255
5256	osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
5257	if (!osdc->completion_wq)
5258		goto out_notify_wq;
5259
5260	schedule_delayed_work(&osdc->timeout_work,
5261			      osdc->client->options->osd_keepalive_timeout);
5262	schedule_delayed_work(&osdc->osds_timeout_work,
5263	    round_jiffies_relative(osdc->client->options->osd_idle_ttl));
5264
5265	return 0;
5266
5267out_notify_wq:
5268	destroy_workqueue(osdc->notify_wq);
5269out_msgpool_reply:
5270	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5271out_msgpool:
5272	ceph_msgpool_destroy(&osdc->msgpool_op);
5273out_mempool:
5274	mempool_destroy(osdc->req_mempool);
5275out_map:
5276	ceph_osdmap_destroy(osdc->osdmap);
5277out:
5278	return err;
5279}
5280
5281void ceph_osdc_stop(struct ceph_osd_client *osdc)
5282{
5283	destroy_workqueue(osdc->completion_wq);
5284	destroy_workqueue(osdc->notify_wq);
5285	cancel_delayed_work_sync(&osdc->timeout_work);
5286	cancel_delayed_work_sync(&osdc->osds_timeout_work);
5287
5288	down_write(&osdc->lock);
5289	while (!RB_EMPTY_ROOT(&osdc->osds)) {
5290		struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
5291						struct ceph_osd, o_node);
5292		close_osd(osd);
5293	}
5294	up_write(&osdc->lock);
5295	WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5296	osd_cleanup(&osdc->homeless_osd);
5297
5298	WARN_ON(!list_empty(&osdc->osd_lru));
5299	WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
5300	WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
5301	WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5302	WARN_ON(atomic_read(&osdc->num_requests));
5303	WARN_ON(atomic_read(&osdc->num_homeless));
5304
5305	ceph_osdmap_destroy(osdc->osdmap);
5306	mempool_destroy(osdc->req_mempool);
5307	ceph_msgpool_destroy(&osdc->msgpool_op);
5308	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
5309}
5310
5311static int osd_req_op_copy_from_init(struct ceph_osd_request *req,
5312				     u64 src_snapid, u64 src_version,
5313				     struct ceph_object_id *src_oid,
5314				     struct ceph_object_locator *src_oloc,
5315				     u32 src_fadvise_flags,
5316				     u32 dst_fadvise_flags,
5317				     u32 truncate_seq, u64 truncate_size,
5318				     u8 copy_from_flags)
5319{
5320	struct ceph_osd_req_op *op;
5321	struct page **pages;
5322	void *p, *end;
5323
5324	pages = ceph_alloc_page_vector(1, GFP_KERNEL);
5325	if (IS_ERR(pages))
5326		return PTR_ERR(pages);
5327
5328	op = osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2,
5329			     dst_fadvise_flags);
5330	op->copy_from.snapid = src_snapid;
5331	op->copy_from.src_version = src_version;
5332	op->copy_from.flags = copy_from_flags;
5333	op->copy_from.src_fadvise_flags = src_fadvise_flags;
5334
5335	p = page_address(pages[0]);
5336	end = p + PAGE_SIZE;
5337	ceph_encode_string(&p, end, src_oid->name, src_oid->name_len);
5338	encode_oloc(&p, end, src_oloc);
5339	ceph_encode_32(&p, truncate_seq);
5340	ceph_encode_64(&p, truncate_size);
5341	op->indata_len = PAGE_SIZE - (end - p);
5342
5343	ceph_osd_data_pages_init(&op->copy_from.osd_data, pages,
5344				 op->indata_len, 0, false, true);
5345	return 0;
5346}
5347
5348int ceph_osdc_copy_from(struct ceph_osd_client *osdc,
5349			u64 src_snapid, u64 src_version,
5350			struct ceph_object_id *src_oid,
5351			struct ceph_object_locator *src_oloc,
5352			u32 src_fadvise_flags,
5353			struct ceph_object_id *dst_oid,
5354			struct ceph_object_locator *dst_oloc,
5355			u32 dst_fadvise_flags,
5356			u32 truncate_seq, u64 truncate_size,
5357			u8 copy_from_flags)
5358{
5359	struct ceph_osd_request *req;
5360	int ret;
5361
5362	req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL);
5363	if (!req)
5364		return -ENOMEM;
5365
5366	req->r_flags = CEPH_OSD_FLAG_WRITE;
5367
5368	ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc);
5369	ceph_oid_copy(&req->r_t.base_oid, dst_oid);
5370
5371	ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid,
5372					src_oloc, src_fadvise_flags,
5373					dst_fadvise_flags, truncate_seq,
5374					truncate_size, copy_from_flags);
5375	if (ret)
5376		goto out;
5377
5378	ret = ceph_osdc_alloc_messages(req, GFP_KERNEL);
5379	if (ret)
5380		goto out;
5381
5382	ceph_osdc_start_request(osdc, req, false);
5383	ret = ceph_osdc_wait_request(osdc, req);
5384
5385out:
5386	ceph_osdc_put_request(req);
5387	return ret;
5388}
5389EXPORT_SYMBOL(ceph_osdc_copy_from);
5390
5391int __init ceph_osdc_setup(void)
5392{
5393	size_t size = sizeof(struct ceph_osd_request) +
5394	    CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
5395
5396	BUG_ON(ceph_osd_request_cache);
5397	ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
5398						   0, 0, NULL);
5399
5400	return ceph_osd_request_cache ? 0 : -ENOMEM;
5401}
5402
5403void ceph_osdc_cleanup(void)
5404{
5405	BUG_ON(!ceph_osd_request_cache);
5406	kmem_cache_destroy(ceph_osd_request_cache);
5407	ceph_osd_request_cache = NULL;
5408}
5409
5410/*
5411 * handle incoming message
5412 */
5413static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
5414{
5415	struct ceph_osd *osd = con->private;
5416	struct ceph_osd_client *osdc = osd->o_osdc;
5417	int type = le16_to_cpu(msg->hdr.type);
5418
5419	switch (type) {
5420	case CEPH_MSG_OSD_MAP:
5421		ceph_osdc_handle_map(osdc, msg);
5422		break;
5423	case CEPH_MSG_OSD_OPREPLY:
5424		handle_reply(osd, msg);
5425		break;
5426	case CEPH_MSG_OSD_BACKOFF:
5427		handle_backoff(osd, msg);
5428		break;
5429	case CEPH_MSG_WATCH_NOTIFY:
5430		handle_watch_notify(osdc, msg);
5431		break;
5432
5433	default:
5434		pr_err("received unknown message type %d %s\n", type,
5435		       ceph_msg_type_name(type));
5436	}
5437
5438	ceph_msg_put(msg);
5439}
5440
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5441/*
5442 * Lookup and return message for incoming reply.  Don't try to do
5443 * anything about a larger than preallocated data portion of the
5444 * message at the moment - for now, just skip the message.
5445 */
5446static struct ceph_msg *get_reply(struct ceph_connection *con,
5447				  struct ceph_msg_header *hdr,
5448				  int *skip)
5449{
5450	struct ceph_osd *osd = con->private;
5451	struct ceph_osd_client *osdc = osd->o_osdc;
5452	struct ceph_msg *m = NULL;
5453	struct ceph_osd_request *req;
5454	int front_len = le32_to_cpu(hdr->front_len);
5455	int data_len = le32_to_cpu(hdr->data_len);
5456	u64 tid = le64_to_cpu(hdr->tid);
 
5457
5458	down_read(&osdc->lock);
5459	if (!osd_registered(osd)) {
5460		dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
5461		*skip = 1;
5462		goto out_unlock_osdc;
5463	}
5464	WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
5465
5466	mutex_lock(&osd->lock);
5467	req = lookup_request(&osd->o_requests, tid);
5468	if (!req) {
5469		dout("%s osd%d tid %llu unknown, skipping\n", __func__,
5470		     osd->o_osd, tid);
5471		*skip = 1;
5472		goto out_unlock_session;
5473	}
5474
5475	ceph_msg_revoke_incoming(req->r_reply);
5476
5477	if (front_len > req->r_reply->front_alloc_len) {
5478		pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
5479			__func__, osd->o_osd, req->r_tid, front_len,
5480			req->r_reply->front_alloc_len);
5481		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
5482				 false);
5483		if (!m)
5484			goto out_unlock_session;
5485		ceph_msg_put(req->r_reply);
5486		req->r_reply = m;
5487	}
5488
5489	if (data_len > req->r_reply->data_length) {
 
5490		pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
5491			__func__, osd->o_osd, req->r_tid, data_len,
5492			req->r_reply->data_length);
5493		m = NULL;
5494		*skip = 1;
5495		goto out_unlock_session;
5496	}
5497
5498	m = ceph_msg_get(req->r_reply);
 
 
5499	dout("get_reply tid %lld %p\n", tid, m);
5500
5501out_unlock_session:
5502	mutex_unlock(&osd->lock);
5503out_unlock_osdc:
5504	up_read(&osdc->lock);
5505	return m;
5506}
5507
5508static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
5509{
5510	struct ceph_msg *m;
5511	int type = le16_to_cpu(hdr->type);
5512	u32 front_len = le32_to_cpu(hdr->front_len);
5513	u32 data_len = le32_to_cpu(hdr->data_len);
5514
5515	m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false);
5516	if (!m)
5517		return NULL;
5518
5519	if (data_len) {
5520		struct page **pages;
5521
5522		pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
5523					       GFP_NOIO);
5524		if (IS_ERR(pages)) {
5525			ceph_msg_put(m);
5526			return NULL;
5527		}
5528
5529		ceph_msg_data_add_pages(m, pages, data_len, 0, true);
5530	}
5531
5532	return m;
5533}
5534
5535static struct ceph_msg *alloc_msg(struct ceph_connection *con,
5536				  struct ceph_msg_header *hdr,
5537				  int *skip)
5538{
5539	struct ceph_osd *osd = con->private;
5540	int type = le16_to_cpu(hdr->type);
5541
5542	*skip = 0;
5543	switch (type) {
5544	case CEPH_MSG_OSD_MAP:
5545	case CEPH_MSG_OSD_BACKOFF:
5546	case CEPH_MSG_WATCH_NOTIFY:
5547		return alloc_msg_with_page_vector(hdr);
5548	case CEPH_MSG_OSD_OPREPLY:
5549		return get_reply(con, hdr, skip);
5550	default:
5551		pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
5552			osd->o_osd, type);
5553		*skip = 1;
5554		return NULL;
5555	}
5556}
5557
5558/*
5559 * Wrappers to refcount containing ceph_osd struct
5560 */
5561static struct ceph_connection *get_osd_con(struct ceph_connection *con)
5562{
5563	struct ceph_osd *osd = con->private;
5564	if (get_osd(osd))
5565		return con;
5566	return NULL;
5567}
5568
5569static void put_osd_con(struct ceph_connection *con)
5570{
5571	struct ceph_osd *osd = con->private;
5572	put_osd(osd);
5573}
5574
5575/*
5576 * authentication
5577 */
 
5578/*
5579 * Note: returned pointer is the address of a structure that's
5580 * managed separately.  Caller must *not* attempt to free it.
5581 */
5582static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
5583					int *proto, int force_new)
5584{
5585	struct ceph_osd *o = con->private;
5586	struct ceph_osd_client *osdc = o->o_osdc;
5587	struct ceph_auth_client *ac = osdc->client->monc.auth;
5588	struct ceph_auth_handshake *auth = &o->o_auth;
 
5589
5590	if (force_new && auth->authorizer) {
5591		ceph_auth_destroy_authorizer(auth->authorizer);
5592		auth->authorizer = NULL;
5593	}
5594	if (!auth->authorizer) {
5595		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5596						      auth);
5597		if (ret)
5598			return ERR_PTR(ret);
5599	} else {
5600		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5601						     auth);
5602		if (ret)
5603			return ERR_PTR(ret);
5604	}
5605	*proto = ac->protocol;
5606
5607	return auth;
5608}
5609
5610static int add_authorizer_challenge(struct ceph_connection *con,
5611				    void *challenge_buf, int challenge_buf_len)
5612{
5613	struct ceph_osd *o = con->private;
5614	struct ceph_osd_client *osdc = o->o_osdc;
5615	struct ceph_auth_client *ac = osdc->client->monc.auth;
5616
5617	return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
5618					    challenge_buf, challenge_buf_len);
5619}
5620
5621static int verify_authorizer_reply(struct ceph_connection *con)
5622{
5623	struct ceph_osd *o = con->private;
5624	struct ceph_osd_client *osdc = o->o_osdc;
5625	struct ceph_auth_client *ac = osdc->client->monc.auth;
 
5626
5627	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
 
 
5628}
5629
5630static int invalidate_authorizer(struct ceph_connection *con)
5631{
5632	struct ceph_osd *o = con->private;
5633	struct ceph_osd_client *osdc = o->o_osdc;
5634	struct ceph_auth_client *ac = osdc->client->monc.auth;
5635
5636	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5637	return ceph_monc_validate_auth(&osdc->client->monc);
5638}
5639
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5640static void osd_reencode_message(struct ceph_msg *msg)
5641{
5642	int type = le16_to_cpu(msg->hdr.type);
5643
5644	if (type == CEPH_MSG_OSD_OP)
5645		encode_request_finish(msg);
5646}
5647
5648static int osd_sign_message(struct ceph_msg *msg)
5649{
5650	struct ceph_osd *o = msg->con->private;
5651	struct ceph_auth_handshake *auth = &o->o_auth;
5652
5653	return ceph_auth_sign_message(auth, msg);
5654}
5655
5656static int osd_check_message_signature(struct ceph_msg *msg)
5657{
5658	struct ceph_osd *o = msg->con->private;
5659	struct ceph_auth_handshake *auth = &o->o_auth;
5660
5661	return ceph_auth_check_message_signature(auth, msg);
5662}
5663
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5664static const struct ceph_connection_operations osd_con_ops = {
5665	.get = get_osd_con,
5666	.put = put_osd_con,
5667	.dispatch = dispatch,
5668	.get_authorizer = get_authorizer,
5669	.add_authorizer_challenge = add_authorizer_challenge,
5670	.verify_authorizer_reply = verify_authorizer_reply,
5671	.invalidate_authorizer = invalidate_authorizer,
5672	.alloc_msg = alloc_msg,
5673	.reencode_message = osd_reencode_message,
 
 
 
 
5674	.sign_message = osd_sign_message,
5675	.check_message_signature = osd_check_message_signature,
5676	.fault = osd_fault,
 
 
 
5677};