1 2#include <linux/ceph/ceph_debug.h> 3 4#include <linux/module.h> 5#include <linux/err.h> 6#include <linux/highmem.h> 7#include <linux/mm.h> 8#include <linux/pagemap.h> 9#include <linux/slab.h> 10#include <linux/uaccess.h> 11#ifdef CONFIG_BLOCK 12#include <linux/bio.h> 13#endif 14 15#include <linux/ceph/libceph.h> 16#include <linux/ceph/osd_client.h> 17#include <linux/ceph/messenger.h> 18#include <linux/ceph/decode.h> 19#include <linux/ceph/auth.h> 20#include <linux/ceph/pagelist.h> 21 22#define OSD_OP_FRONT_LEN 4096 23#define OSD_OPREPLY_FRONT_LEN 512 24 25static struct kmem_cache *ceph_osd_request_cache; 26 27static const struct ceph_connection_operations osd_con_ops; 28 29static void __send_queued(struct ceph_osd_client *osdc); 30static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd); 31static void __register_request(struct ceph_osd_client *osdc, 32 struct ceph_osd_request *req); 33static void __unregister_request(struct ceph_osd_client *osdc, 34 struct ceph_osd_request *req); 35static void __unregister_linger_request(struct ceph_osd_client *osdc, 36 struct ceph_osd_request *req); 37static void __enqueue_request(struct ceph_osd_request *req); 38static void __send_request(struct ceph_osd_client *osdc, 39 struct ceph_osd_request *req); 40 41/* 42 * Implement client access to distributed object storage cluster. 43 * 44 * All data objects are stored within a cluster/cloud of OSDs, or 45 * "object storage devices." (Note that Ceph OSDs have _nothing_ to 46 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply 47 * remote daemons serving up and coordinating consistent and safe 48 * access to storage. 49 * 50 * Cluster membership and the mapping of data objects onto storage devices 51 * are described by the osd map. 52 * 53 * We keep track of pending OSD requests (read, write), resubmit 54 * requests to different OSDs when the cluster topology/data layout 55 * change, or retry the affected requests when the communications 56 * channel with an OSD is reset. 57 */ 58 59/* 60 * calculate the mapping of a file extent onto an object, and fill out the 61 * request accordingly. shorten extent as necessary if it crosses an 62 * object boundary. 63 * 64 * fill osd op in request message. 65 */ 66static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, 67 u64 *objnum, u64 *objoff, u64 *objlen) 68{ 69 u64 orig_len = *plen; 70 int r; 71 72 /* object extent? */ 73 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum, 74 objoff, objlen); 75 if (r < 0) 76 return r; 77 if (*objlen < orig_len) { 78 *plen = *objlen; 79 dout(" skipping last %llu, final file extent %llu~%llu\n", 80 orig_len - *plen, off, *plen); 81 } 82 83 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); 84 85 return 0; 86} 87 88static void ceph_osd_data_init(struct ceph_osd_data *osd_data) 89{ 90 memset(osd_data, 0, sizeof (*osd_data)); 91 osd_data->type = CEPH_OSD_DATA_TYPE_NONE; 92} 93 94static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data, 95 struct page **pages, u64 length, u32 alignment, 96 bool pages_from_pool, bool own_pages) 97{ 98 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; 99 osd_data->pages = pages; 100 osd_data->length = length; 101 osd_data->alignment = alignment; 102 osd_data->pages_from_pool = pages_from_pool; 103 osd_data->own_pages = own_pages; 104} 105 106static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, 107 struct ceph_pagelist *pagelist) 108{ 109 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST; 110 osd_data->pagelist = pagelist; 111} 112 113#ifdef CONFIG_BLOCK 114static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, 115 struct bio *bio, size_t bio_length) 116{ 117 osd_data->type = CEPH_OSD_DATA_TYPE_BIO; 118 osd_data->bio = bio; 119 osd_data->bio_length = bio_length; 120} 121#endif /* CONFIG_BLOCK */ 122 123#define osd_req_op_data(oreq, whch, typ, fld) \ 124 ({ \ 125 BUG_ON(whch >= (oreq)->r_num_ops); \ 126 &(oreq)->r_ops[whch].typ.fld; \ 127 }) 128 129static struct ceph_osd_data * 130osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) 131{ 132 BUG_ON(which >= osd_req->r_num_ops); 133 134 return &osd_req->r_ops[which].raw_data_in; 135} 136 137struct ceph_osd_data * 138osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, 139 unsigned int which) 140{ 141 return osd_req_op_data(osd_req, which, extent, osd_data); 142} 143EXPORT_SYMBOL(osd_req_op_extent_osd_data); 144 145struct ceph_osd_data * 146osd_req_op_cls_response_data(struct ceph_osd_request *osd_req, 147 unsigned int which) 148{ 149 return osd_req_op_data(osd_req, which, cls, response_data); 150} 151EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */ 152 153void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, 154 unsigned int which, struct page **pages, 155 u64 length, u32 alignment, 156 bool pages_from_pool, bool own_pages) 157{ 158 struct ceph_osd_data *osd_data; 159 160 osd_data = osd_req_op_raw_data_in(osd_req, which); 161 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 162 pages_from_pool, own_pages); 163} 164EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); 165 166void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, 167 unsigned int which, struct page **pages, 168 u64 length, u32 alignment, 169 bool pages_from_pool, bool own_pages) 170{ 171 struct ceph_osd_data *osd_data; 172 173 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 174 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 175 pages_from_pool, own_pages); 176} 177EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); 178 179void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, 180 unsigned int which, struct ceph_pagelist *pagelist) 181{ 182 struct ceph_osd_data *osd_data; 183 184 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 185 ceph_osd_data_pagelist_init(osd_data, pagelist); 186} 187EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); 188 189#ifdef CONFIG_BLOCK 190void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 191 unsigned int which, struct bio *bio, size_t bio_length) 192{ 193 struct ceph_osd_data *osd_data; 194 195 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 196 ceph_osd_data_bio_init(osd_data, bio, bio_length); 197} 198EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); 199#endif /* CONFIG_BLOCK */ 200 201static void osd_req_op_cls_request_info_pagelist( 202 struct ceph_osd_request *osd_req, 203 unsigned int which, struct ceph_pagelist *pagelist) 204{ 205 struct ceph_osd_data *osd_data; 206 207 osd_data = osd_req_op_data(osd_req, which, cls, request_info); 208 ceph_osd_data_pagelist_init(osd_data, pagelist); 209} 210 211void osd_req_op_cls_request_data_pagelist( 212 struct ceph_osd_request *osd_req, 213 unsigned int which, struct ceph_pagelist *pagelist) 214{ 215 struct ceph_osd_data *osd_data; 216 217 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 218 ceph_osd_data_pagelist_init(osd_data, pagelist); 219} 220EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); 221 222void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, 223 unsigned int which, struct page **pages, u64 length, 224 u32 alignment, bool pages_from_pool, bool own_pages) 225{ 226 struct ceph_osd_data *osd_data; 227 228 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 229 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 230 pages_from_pool, own_pages); 231} 232EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); 233 234void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, 235 unsigned int which, struct page **pages, u64 length, 236 u32 alignment, bool pages_from_pool, bool own_pages) 237{ 238 struct ceph_osd_data *osd_data; 239 240 osd_data = osd_req_op_data(osd_req, which, cls, response_data); 241 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 242 pages_from_pool, own_pages); 243} 244EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); 245 246static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) 247{ 248 switch (osd_data->type) { 249 case CEPH_OSD_DATA_TYPE_NONE: 250 return 0; 251 case CEPH_OSD_DATA_TYPE_PAGES: 252 return osd_data->length; 253 case CEPH_OSD_DATA_TYPE_PAGELIST: 254 return (u64)osd_data->pagelist->length; 255#ifdef CONFIG_BLOCK 256 case CEPH_OSD_DATA_TYPE_BIO: 257 return (u64)osd_data->bio_length; 258#endif /* CONFIG_BLOCK */ 259 default: 260 WARN(true, "unrecognized data type %d\n", (int)osd_data->type); 261 return 0; 262 } 263} 264 265static void ceph_osd_data_release(struct ceph_osd_data *osd_data) 266{ 267 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { 268 int num_pages; 269 270 num_pages = calc_pages_for((u64)osd_data->alignment, 271 (u64)osd_data->length); 272 ceph_release_page_vector(osd_data->pages, num_pages); 273 } 274 ceph_osd_data_init(osd_data); 275} 276 277static void osd_req_op_data_release(struct ceph_osd_request *osd_req, 278 unsigned int which) 279{ 280 struct ceph_osd_req_op *op; 281 282 BUG_ON(which >= osd_req->r_num_ops); 283 op = &osd_req->r_ops[which]; 284 285 switch (op->op) { 286 case CEPH_OSD_OP_READ: 287 case CEPH_OSD_OP_WRITE: 288 ceph_osd_data_release(&op->extent.osd_data); 289 break; 290 case CEPH_OSD_OP_CALL: 291 ceph_osd_data_release(&op->cls.request_info); 292 ceph_osd_data_release(&op->cls.request_data); 293 ceph_osd_data_release(&op->cls.response_data); 294 break; 295 case CEPH_OSD_OP_SETXATTR: 296 case CEPH_OSD_OP_CMPXATTR: 297 ceph_osd_data_release(&op->xattr.osd_data); 298 break; 299 default: 300 break; 301 } 302} 303 304/* 305 * requests 306 */ 307static void ceph_osdc_release_request(struct kref *kref) 308{ 309 struct ceph_osd_request *req = container_of(kref, 310 struct ceph_osd_request, r_kref); 311 unsigned int which; 312 313 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 314 req->r_request, req->r_reply); 315 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 316 WARN_ON(!list_empty(&req->r_req_lru_item)); 317 WARN_ON(!list_empty(&req->r_osd_item)); 318 WARN_ON(!list_empty(&req->r_linger_item)); 319 WARN_ON(!list_empty(&req->r_linger_osd_item)); 320 WARN_ON(req->r_osd); 321 322 if (req->r_request) 323 ceph_msg_put(req->r_request); 324 if (req->r_reply) { 325 ceph_msg_revoke_incoming(req->r_reply); 326 ceph_msg_put(req->r_reply); 327 } 328 329 for (which = 0; which < req->r_num_ops; which++) 330 osd_req_op_data_release(req, which); 331 332 ceph_put_snap_context(req->r_snapc); 333 if (req->r_mempool) 334 mempool_free(req, req->r_osdc->req_mempool); 335 else 336 kmem_cache_free(ceph_osd_request_cache, req); 337 338} 339 340void ceph_osdc_get_request(struct ceph_osd_request *req) 341{ 342 dout("%s %p (was %d)\n", __func__, req, 343 atomic_read(&req->r_kref.refcount)); 344 kref_get(&req->r_kref); 345} 346EXPORT_SYMBOL(ceph_osdc_get_request); 347 348void ceph_osdc_put_request(struct ceph_osd_request *req) 349{ 350 dout("%s %p (was %d)\n", __func__, req, 351 atomic_read(&req->r_kref.refcount)); 352 kref_put(&req->r_kref, ceph_osdc_release_request); 353} 354EXPORT_SYMBOL(ceph_osdc_put_request); 355 356struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 357 struct ceph_snap_context *snapc, 358 unsigned int num_ops, 359 bool use_mempool, 360 gfp_t gfp_flags) 361{ 362 struct ceph_osd_request *req; 363 struct ceph_msg *msg; 364 size_t msg_size; 365 366 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX); 367 BUG_ON(num_ops > CEPH_OSD_MAX_OP); 368 369 msg_size = 4 + 4 + 8 + 8 + 4+8; 370 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */ 371 msg_size += 1 + 8 + 4 + 4; /* pg_t */ 372 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */ 373 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op); 374 msg_size += 8; /* snapid */ 375 msg_size += 8; /* snap_seq */ 376 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */ 377 msg_size += 4; 378 379 if (use_mempool) { 380 req = mempool_alloc(osdc->req_mempool, gfp_flags); 381 memset(req, 0, sizeof(*req)); 382 } else { 383 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags); 384 } 385 if (req == NULL) 386 return NULL; 387 388 req->r_osdc = osdc; 389 req->r_mempool = use_mempool; 390 req->r_num_ops = num_ops; 391 392 kref_init(&req->r_kref); 393 init_completion(&req->r_completion); 394 init_completion(&req->r_safe_completion); 395 RB_CLEAR_NODE(&req->r_node); 396 INIT_LIST_HEAD(&req->r_unsafe_item); 397 INIT_LIST_HEAD(&req->r_linger_item); 398 INIT_LIST_HEAD(&req->r_linger_osd_item); 399 INIT_LIST_HEAD(&req->r_req_lru_item); 400 INIT_LIST_HEAD(&req->r_osd_item); 401 402 req->r_base_oloc.pool = -1; 403 req->r_target_oloc.pool = -1; 404 405 /* create reply message */ 406 if (use_mempool) 407 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 408 else 409 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, 410 OSD_OPREPLY_FRONT_LEN, gfp_flags, true); 411 if (!msg) { 412 ceph_osdc_put_request(req); 413 return NULL; 414 } 415 req->r_reply = msg; 416 417 /* create request message; allow space for oid */ 418 if (use_mempool) 419 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 420 else 421 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true); 422 if (!msg) { 423 ceph_osdc_put_request(req); 424 return NULL; 425 } 426 427 memset(msg->front.iov_base, 0, msg->front.iov_len); 428 429 req->r_request = msg; 430 431 return req; 432} 433EXPORT_SYMBOL(ceph_osdc_alloc_request); 434 435static bool osd_req_opcode_valid(u16 opcode) 436{ 437 switch (opcode) { 438#define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 439__CEPH_FORALL_OSD_OPS(GENERATE_CASE) 440#undef GENERATE_CASE 441 default: 442 return false; 443 } 444} 445 446/* 447 * This is an osd op init function for opcodes that have no data or 448 * other information associated with them. It also serves as a 449 * common init routine for all the other init functions, below. 450 */ 451static struct ceph_osd_req_op * 452_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 453 u16 opcode) 454{ 455 struct ceph_osd_req_op *op; 456 457 BUG_ON(which >= osd_req->r_num_ops); 458 BUG_ON(!osd_req_opcode_valid(opcode)); 459 460 op = &osd_req->r_ops[which]; 461 memset(op, 0, sizeof (*op)); 462 op->op = opcode; 463 464 return op; 465} 466 467void osd_req_op_init(struct ceph_osd_request *osd_req, 468 unsigned int which, u16 opcode) 469{ 470 (void)_osd_req_op_init(osd_req, which, opcode); 471} 472EXPORT_SYMBOL(osd_req_op_init); 473 474void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 475 unsigned int which, u16 opcode, 476 u64 offset, u64 length, 477 u64 truncate_size, u32 truncate_seq) 478{ 479 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode); 480 size_t payload_len = 0; 481 482 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 483 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE); 484 485 op->extent.offset = offset; 486 op->extent.length = length; 487 op->extent.truncate_size = truncate_size; 488 op->extent.truncate_seq = truncate_seq; 489 if (opcode == CEPH_OSD_OP_WRITE) 490 payload_len += length; 491 492 op->payload_len = payload_len; 493} 494EXPORT_SYMBOL(osd_req_op_extent_init); 495 496void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 497 unsigned int which, u64 length) 498{ 499 struct ceph_osd_req_op *op; 500 u64 previous; 501 502 BUG_ON(which >= osd_req->r_num_ops); 503 op = &osd_req->r_ops[which]; 504 previous = op->extent.length; 505 506 if (length == previous) 507 return; /* Nothing to do */ 508 BUG_ON(length > previous); 509 510 op->extent.length = length; 511 op->payload_len -= previous - length; 512} 513EXPORT_SYMBOL(osd_req_op_extent_update); 514 515void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 516 u16 opcode, const char *class, const char *method) 517{ 518 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode); 519 struct ceph_pagelist *pagelist; 520 size_t payload_len = 0; 521 size_t size; 522 523 BUG_ON(opcode != CEPH_OSD_OP_CALL); 524 525 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 526 BUG_ON(!pagelist); 527 ceph_pagelist_init(pagelist); 528 529 op->cls.class_name = class; 530 size = strlen(class); 531 BUG_ON(size > (size_t) U8_MAX); 532 op->cls.class_len = size; 533 ceph_pagelist_append(pagelist, class, size); 534 payload_len += size; 535 536 op->cls.method_name = method; 537 size = strlen(method); 538 BUG_ON(size > (size_t) U8_MAX); 539 op->cls.method_len = size; 540 ceph_pagelist_append(pagelist, method, size); 541 payload_len += size; 542 543 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 544 545 op->cls.argc = 0; /* currently unused */ 546 547 op->payload_len = payload_len; 548} 549EXPORT_SYMBOL(osd_req_op_cls_init); 550 551int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 552 u16 opcode, const char *name, const void *value, 553 size_t size, u8 cmp_op, u8 cmp_mode) 554{ 555 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode); 556 struct ceph_pagelist *pagelist; 557 size_t payload_len; 558 559 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 560 561 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 562 if (!pagelist) 563 return -ENOMEM; 564 565 ceph_pagelist_init(pagelist); 566 567 payload_len = strlen(name); 568 op->xattr.name_len = payload_len; 569 ceph_pagelist_append(pagelist, name, payload_len); 570 571 op->xattr.value_len = size; 572 ceph_pagelist_append(pagelist, value, size); 573 payload_len += size; 574 575 op->xattr.cmp_op = cmp_op; 576 op->xattr.cmp_mode = cmp_mode; 577 578 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 579 op->payload_len = payload_len; 580 return 0; 581} 582EXPORT_SYMBOL(osd_req_op_xattr_init); 583 584void osd_req_op_watch_init(struct ceph_osd_request *osd_req, 585 unsigned int which, u16 opcode, 586 u64 cookie, u64 version, int flag) 587{ 588 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode); 589 590 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH); 591 592 op->watch.cookie = cookie; 593 op->watch.ver = version; 594 if (opcode == CEPH_OSD_OP_WATCH && flag) 595 op->watch.flag = (u8)1; 596} 597EXPORT_SYMBOL(osd_req_op_watch_init); 598 599void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 600 unsigned int which, 601 u64 expected_object_size, 602 u64 expected_write_size) 603{ 604 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 605 CEPH_OSD_OP_SETALLOCHINT); 606 607 op->alloc_hint.expected_object_size = expected_object_size; 608 op->alloc_hint.expected_write_size = expected_write_size; 609 610 /* 611 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 612 * not worth a feature bit. Set FAILOK per-op flag to make 613 * sure older osds don't trip over an unsupported opcode. 614 */ 615 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 616} 617EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 618 619static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 620 struct ceph_osd_data *osd_data) 621{ 622 u64 length = ceph_osd_data_length(osd_data); 623 624 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 625 BUG_ON(length > (u64) SIZE_MAX); 626 if (length) 627 ceph_msg_data_add_pages(msg, osd_data->pages, 628 length, osd_data->alignment); 629 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 630 BUG_ON(!length); 631 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 632#ifdef CONFIG_BLOCK 633 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 634 ceph_msg_data_add_bio(msg, osd_data->bio, length); 635#endif 636 } else { 637 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 638 } 639} 640 641static u64 osd_req_encode_op(struct ceph_osd_request *req, 642 struct ceph_osd_op *dst, unsigned int which) 643{ 644 struct ceph_osd_req_op *src; 645 struct ceph_osd_data *osd_data; 646 u64 request_data_len = 0; 647 u64 data_length; 648 649 BUG_ON(which >= req->r_num_ops); 650 src = &req->r_ops[which]; 651 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 652 pr_err("unrecognized osd opcode %d\n", src->op); 653 654 return 0; 655 } 656 657 switch (src->op) { 658 case CEPH_OSD_OP_STAT: 659 osd_data = &src->raw_data_in; 660 ceph_osdc_msg_data_add(req->r_reply, osd_data); 661 break; 662 case CEPH_OSD_OP_READ: 663 case CEPH_OSD_OP_WRITE: 664 case CEPH_OSD_OP_ZERO: 665 case CEPH_OSD_OP_TRUNCATE: 666 if (src->op == CEPH_OSD_OP_WRITE) 667 request_data_len = src->extent.length; 668 dst->extent.offset = cpu_to_le64(src->extent.offset); 669 dst->extent.length = cpu_to_le64(src->extent.length); 670 dst->extent.truncate_size = 671 cpu_to_le64(src->extent.truncate_size); 672 dst->extent.truncate_seq = 673 cpu_to_le32(src->extent.truncate_seq); 674 osd_data = &src->extent.osd_data; 675 if (src->op == CEPH_OSD_OP_WRITE) 676 ceph_osdc_msg_data_add(req->r_request, osd_data); 677 else 678 ceph_osdc_msg_data_add(req->r_reply, osd_data); 679 break; 680 case CEPH_OSD_OP_CALL: 681 dst->cls.class_len = src->cls.class_len; 682 dst->cls.method_len = src->cls.method_len; 683 osd_data = &src->cls.request_info; 684 ceph_osdc_msg_data_add(req->r_request, osd_data); 685 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST); 686 request_data_len = osd_data->pagelist->length; 687 688 osd_data = &src->cls.request_data; 689 data_length = ceph_osd_data_length(osd_data); 690 if (data_length) { 691 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE); 692 dst->cls.indata_len = cpu_to_le32(data_length); 693 ceph_osdc_msg_data_add(req->r_request, osd_data); 694 src->payload_len += data_length; 695 request_data_len += data_length; 696 } 697 osd_data = &src->cls.response_data; 698 ceph_osdc_msg_data_add(req->r_reply, osd_data); 699 break; 700 case CEPH_OSD_OP_STARTSYNC: 701 break; 702 case CEPH_OSD_OP_NOTIFY_ACK: 703 case CEPH_OSD_OP_WATCH: 704 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 705 dst->watch.ver = cpu_to_le64(src->watch.ver); 706 dst->watch.flag = src->watch.flag; 707 break; 708 case CEPH_OSD_OP_SETALLOCHINT: 709 dst->alloc_hint.expected_object_size = 710 cpu_to_le64(src->alloc_hint.expected_object_size); 711 dst->alloc_hint.expected_write_size = 712 cpu_to_le64(src->alloc_hint.expected_write_size); 713 break; 714 case CEPH_OSD_OP_SETXATTR: 715 case CEPH_OSD_OP_CMPXATTR: 716 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 717 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 718 dst->xattr.cmp_op = src->xattr.cmp_op; 719 dst->xattr.cmp_mode = src->xattr.cmp_mode; 720 osd_data = &src->xattr.osd_data; 721 ceph_osdc_msg_data_add(req->r_request, osd_data); 722 request_data_len = osd_data->pagelist->length; 723 break; 724 case CEPH_OSD_OP_CREATE: 725 case CEPH_OSD_OP_DELETE: 726 break; 727 default: 728 pr_err("unsupported osd opcode %s\n", 729 ceph_osd_op_name(src->op)); 730 WARN_ON(1); 731 732 return 0; 733 } 734 735 dst->op = cpu_to_le16(src->op); 736 dst->flags = cpu_to_le32(src->flags); 737 dst->payload_len = cpu_to_le32(src->payload_len); 738 739 return request_data_len; 740} 741 742/* 743 * build new request AND message, calculate layout, and adjust file 744 * extent as needed. 745 * 746 * if the file was recently truncated, we include information about its 747 * old and new size so that the object can be updated appropriately. (we 748 * avoid synchronously deleting truncated objects because it's slow.) 749 * 750 * if @do_sync, include a 'startsync' command so that the osd will flush 751 * data quickly. 752 */ 753struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 754 struct ceph_file_layout *layout, 755 struct ceph_vino vino, 756 u64 off, u64 *plen, 757 unsigned int which, int num_ops, 758 int opcode, int flags, 759 struct ceph_snap_context *snapc, 760 u32 truncate_seq, 761 u64 truncate_size, 762 bool use_mempool) 763{ 764 struct ceph_osd_request *req; 765 u64 objnum = 0; 766 u64 objoff = 0; 767 u64 objlen = 0; 768 int r; 769 770 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 771 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 772 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 773 774 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 775 GFP_NOFS); 776 if (!req) 777 return ERR_PTR(-ENOMEM); 778 779 req->r_flags = flags; 780 781 /* calculate max write size */ 782 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 783 if (r < 0) { 784 ceph_osdc_put_request(req); 785 return ERR_PTR(r); 786 } 787 788 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 789 osd_req_op_init(req, which, opcode); 790 } else { 791 u32 object_size = le32_to_cpu(layout->fl_object_size); 792 u32 object_base = off - objoff; 793 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 794 if (truncate_size <= object_base) { 795 truncate_size = 0; 796 } else { 797 truncate_size -= object_base; 798 if (truncate_size > object_size) 799 truncate_size = object_size; 800 } 801 } 802 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 803 truncate_size, truncate_seq); 804 } 805 806 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout); 807 808 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name), 809 "%llx.%08llx", vino.ino, objnum); 810 req->r_base_oid.name_len = strlen(req->r_base_oid.name); 811 812 return req; 813} 814EXPORT_SYMBOL(ceph_osdc_new_request); 815 816/* 817 * We keep osd requests in an rbtree, sorted by ->r_tid. 818 */ 819static void __insert_request(struct ceph_osd_client *osdc, 820 struct ceph_osd_request *new) 821{ 822 struct rb_node **p = &osdc->requests.rb_node; 823 struct rb_node *parent = NULL; 824 struct ceph_osd_request *req = NULL; 825 826 while (*p) { 827 parent = *p; 828 req = rb_entry(parent, struct ceph_osd_request, r_node); 829 if (new->r_tid < req->r_tid) 830 p = &(*p)->rb_left; 831 else if (new->r_tid > req->r_tid) 832 p = &(*p)->rb_right; 833 else 834 BUG(); 835 } 836 837 rb_link_node(&new->r_node, parent, p); 838 rb_insert_color(&new->r_node, &osdc->requests); 839} 840 841static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, 842 u64 tid) 843{ 844 struct ceph_osd_request *req; 845 struct rb_node *n = osdc->requests.rb_node; 846 847 while (n) { 848 req = rb_entry(n, struct ceph_osd_request, r_node); 849 if (tid < req->r_tid) 850 n = n->rb_left; 851 else if (tid > req->r_tid) 852 n = n->rb_right; 853 else 854 return req; 855 } 856 return NULL; 857} 858 859static struct ceph_osd_request * 860__lookup_request_ge(struct ceph_osd_client *osdc, 861 u64 tid) 862{ 863 struct ceph_osd_request *req; 864 struct rb_node *n = osdc->requests.rb_node; 865 866 while (n) { 867 req = rb_entry(n, struct ceph_osd_request, r_node); 868 if (tid < req->r_tid) { 869 if (!n->rb_left) 870 return req; 871 n = n->rb_left; 872 } else if (tid > req->r_tid) { 873 n = n->rb_right; 874 } else { 875 return req; 876 } 877 } 878 return NULL; 879} 880 881static void __kick_linger_request(struct ceph_osd_request *req) 882{ 883 struct ceph_osd_client *osdc = req->r_osdc; 884 struct ceph_osd *osd = req->r_osd; 885 886 /* 887 * Linger requests need to be resent with a new tid to avoid 888 * the dup op detection logic on the OSDs. Achieve this with 889 * a re-register dance instead of open-coding. 890 */ 891 ceph_osdc_get_request(req); 892 if (!list_empty(&req->r_linger_item)) 893 __unregister_linger_request(osdc, req); 894 else 895 __unregister_request(osdc, req); 896 __register_request(osdc, req); 897 ceph_osdc_put_request(req); 898 899 /* 900 * Unless request has been registered as both normal and 901 * lingering, __unregister{,_linger}_request clears r_osd. 902 * However, here we need to preserve r_osd to make sure we 903 * requeue on the same OSD. 904 */ 905 WARN_ON(req->r_osd || !osd); 906 req->r_osd = osd; 907 908 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid); 909 __enqueue_request(req); 910} 911 912/* 913 * Resubmit requests pending on the given osd. 914 */ 915static void __kick_osd_requests(struct ceph_osd_client *osdc, 916 struct ceph_osd *osd) 917{ 918 struct ceph_osd_request *req, *nreq; 919 LIST_HEAD(resend); 920 LIST_HEAD(resend_linger); 921 int err; 922 923 dout("%s osd%d\n", __func__, osd->o_osd); 924 err = __reset_osd(osdc, osd); 925 if (err) 926 return; 927 928 /* 929 * Build up a list of requests to resend by traversing the 930 * osd's list of requests. Requests for a given object are 931 * sent in tid order, and that is also the order they're 932 * kept on this list. Therefore all requests that are in 933 * flight will be found first, followed by all requests that 934 * have not yet been sent. And to resend requests while 935 * preserving this order we will want to put any sent 936 * requests back on the front of the osd client's unsent 937 * list. 938 * 939 * So we build a separate ordered list of already-sent 940 * requests for the affected osd and splice it onto the 941 * front of the osd client's unsent list. Once we've seen a 942 * request that has not yet been sent we're done. Those 943 * requests are already sitting right where they belong. 944 */ 945 list_for_each_entry(req, &osd->o_requests, r_osd_item) { 946 if (!req->r_sent) 947 break; 948 949 if (!req->r_linger) { 950 dout("%s requeueing %p tid %llu\n", __func__, req, 951 req->r_tid); 952 list_move_tail(&req->r_req_lru_item, &resend); 953 req->r_flags |= CEPH_OSD_FLAG_RETRY; 954 } else { 955 list_move_tail(&req->r_req_lru_item, &resend_linger); 956 } 957 } 958 list_splice(&resend, &osdc->req_unsent); 959 960 /* 961 * Both registered and not yet registered linger requests are 962 * enqueued with a new tid on the same OSD. We add/move them 963 * to req_unsent/o_requests at the end to keep things in tid 964 * order. 965 */ 966 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, 967 r_linger_osd_item) { 968 WARN_ON(!list_empty(&req->r_req_lru_item)); 969 __kick_linger_request(req); 970 } 971 972 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item) 973 __kick_linger_request(req); 974} 975 976/* 977 * If the osd connection drops, we need to resubmit all requests. 978 */ 979static void osd_reset(struct ceph_connection *con) 980{ 981 struct ceph_osd *osd = con->private; 982 struct ceph_osd_client *osdc; 983 984 if (!osd) 985 return; 986 dout("osd_reset osd%d\n", osd->o_osd); 987 osdc = osd->o_osdc; 988 down_read(&osdc->map_sem); 989 mutex_lock(&osdc->request_mutex); 990 __kick_osd_requests(osdc, osd); 991 __send_queued(osdc); 992 mutex_unlock(&osdc->request_mutex); 993 up_read(&osdc->map_sem); 994} 995 996/* 997 * Track open sessions with osds. 998 */ 999static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1000{ 1001 struct ceph_osd *osd; 1002 1003 osd = kzalloc(sizeof(*osd), GFP_NOFS); 1004 if (!osd) 1005 return NULL; 1006 1007 atomic_set(&osd->o_ref, 1); 1008 osd->o_osdc = osdc; 1009 osd->o_osd = onum; 1010 RB_CLEAR_NODE(&osd->o_node); 1011 INIT_LIST_HEAD(&osd->o_requests); 1012 INIT_LIST_HEAD(&osd->o_linger_requests); 1013 INIT_LIST_HEAD(&osd->o_osd_lru); 1014 osd->o_incarnation = 1; 1015 1016 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1017 1018 INIT_LIST_HEAD(&osd->o_keepalive_item); 1019 return osd; 1020} 1021 1022static struct ceph_osd *get_osd(struct ceph_osd *osd) 1023{ 1024 if (atomic_inc_not_zero(&osd->o_ref)) { 1025 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, 1026 atomic_read(&osd->o_ref)); 1027 return osd; 1028 } else { 1029 dout("get_osd %p FAIL\n", osd); 1030 return NULL; 1031 } 1032} 1033 1034static void put_osd(struct ceph_osd *osd) 1035{ 1036 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), 1037 atomic_read(&osd->o_ref) - 1); 1038 if (atomic_dec_and_test(&osd->o_ref)) { 1039 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; 1040 1041 if (osd->o_auth.authorizer) 1042 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer); 1043 kfree(osd); 1044 } 1045} 1046 1047/* 1048 * remove an osd from our map 1049 */ 1050static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1051{ 1052 dout("%s %p osd%d\n", __func__, osd, osd->o_osd); 1053 WARN_ON(!list_empty(&osd->o_requests)); 1054 WARN_ON(!list_empty(&osd->o_linger_requests)); 1055 1056 list_del_init(&osd->o_osd_lru); 1057 rb_erase(&osd->o_node, &osdc->osds); 1058 RB_CLEAR_NODE(&osd->o_node); 1059} 1060 1061static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1062{ 1063 dout("%s %p osd%d\n", __func__, osd, osd->o_osd); 1064 1065 if (!RB_EMPTY_NODE(&osd->o_node)) { 1066 ceph_con_close(&osd->o_con); 1067 __remove_osd(osdc, osd); 1068 put_osd(osd); 1069 } 1070} 1071 1072static void remove_all_osds(struct ceph_osd_client *osdc) 1073{ 1074 dout("%s %p\n", __func__, osdc); 1075 mutex_lock(&osdc->request_mutex); 1076 while (!RB_EMPTY_ROOT(&osdc->osds)) { 1077 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 1078 struct ceph_osd, o_node); 1079 remove_osd(osdc, osd); 1080 } 1081 mutex_unlock(&osdc->request_mutex); 1082} 1083 1084static void __move_osd_to_lru(struct ceph_osd_client *osdc, 1085 struct ceph_osd *osd) 1086{ 1087 dout("%s %p\n", __func__, osd); 1088 BUG_ON(!list_empty(&osd->o_osd_lru)); 1089 1090 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1091 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; 1092} 1093 1094static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc, 1095 struct ceph_osd *osd) 1096{ 1097 dout("%s %p\n", __func__, osd); 1098 1099 if (list_empty(&osd->o_requests) && 1100 list_empty(&osd->o_linger_requests)) 1101 __move_osd_to_lru(osdc, osd); 1102} 1103 1104static void __remove_osd_from_lru(struct ceph_osd *osd) 1105{ 1106 dout("__remove_osd_from_lru %p\n", osd); 1107 if (!list_empty(&osd->o_osd_lru)) 1108 list_del_init(&osd->o_osd_lru); 1109} 1110 1111static void remove_old_osds(struct ceph_osd_client *osdc) 1112{ 1113 struct ceph_osd *osd, *nosd; 1114 1115 dout("__remove_old_osds %p\n", osdc); 1116 mutex_lock(&osdc->request_mutex); 1117 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 1118 if (time_before(jiffies, osd->lru_ttl)) 1119 break; 1120 remove_osd(osdc, osd); 1121 } 1122 mutex_unlock(&osdc->request_mutex); 1123} 1124 1125/* 1126 * reset osd connect 1127 */ 1128static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1129{ 1130 struct ceph_entity_addr *peer_addr; 1131 1132 dout("__reset_osd %p osd%d\n", osd, osd->o_osd); 1133 if (list_empty(&osd->o_requests) && 1134 list_empty(&osd->o_linger_requests)) { 1135 remove_osd(osdc, osd); 1136 return -ENODEV; 1137 } 1138 1139 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd]; 1140 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1141 !ceph_con_opened(&osd->o_con)) { 1142 struct ceph_osd_request *req; 1143 1144 dout("osd addr hasn't changed and connection never opened, " 1145 "letting msgr retry\n"); 1146 /* touch each r_stamp for handle_timeout()'s benfit */ 1147 list_for_each_entry(req, &osd->o_requests, r_osd_item) 1148 req->r_stamp = jiffies; 1149 1150 return -EAGAIN; 1151 } 1152 1153 ceph_con_close(&osd->o_con); 1154 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1155 osd->o_incarnation++; 1156 1157 return 0; 1158} 1159 1160static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) 1161{ 1162 struct rb_node **p = &osdc->osds.rb_node; 1163 struct rb_node *parent = NULL; 1164 struct ceph_osd *osd = NULL; 1165 1166 dout("__insert_osd %p osd%d\n", new, new->o_osd); 1167 while (*p) { 1168 parent = *p; 1169 osd = rb_entry(parent, struct ceph_osd, o_node); 1170 if (new->o_osd < osd->o_osd) 1171 p = &(*p)->rb_left; 1172 else if (new->o_osd > osd->o_osd) 1173 p = &(*p)->rb_right; 1174 else 1175 BUG(); 1176 } 1177 1178 rb_link_node(&new->o_node, parent, p); 1179 rb_insert_color(&new->o_node, &osdc->osds); 1180} 1181 1182static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) 1183{ 1184 struct ceph_osd *osd; 1185 struct rb_node *n = osdc->osds.rb_node; 1186 1187 while (n) { 1188 osd = rb_entry(n, struct ceph_osd, o_node); 1189 if (o < osd->o_osd) 1190 n = n->rb_left; 1191 else if (o > osd->o_osd) 1192 n = n->rb_right; 1193 else 1194 return osd; 1195 } 1196 return NULL; 1197} 1198 1199static void __schedule_osd_timeout(struct ceph_osd_client *osdc) 1200{ 1201 schedule_delayed_work(&osdc->timeout_work, 1202 osdc->client->options->osd_keepalive_timeout * HZ); 1203} 1204 1205static void __cancel_osd_timeout(struct ceph_osd_client *osdc) 1206{ 1207 cancel_delayed_work(&osdc->timeout_work); 1208} 1209 1210/* 1211 * Register request, assign tid. If this is the first request, set up 1212 * the timeout event. 1213 */ 1214static void __register_request(struct ceph_osd_client *osdc, 1215 struct ceph_osd_request *req) 1216{ 1217 req->r_tid = ++osdc->last_tid; 1218 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 1219 dout("__register_request %p tid %lld\n", req, req->r_tid); 1220 __insert_request(osdc, req); 1221 ceph_osdc_get_request(req); 1222 osdc->num_requests++; 1223 if (osdc->num_requests == 1) { 1224 dout(" first request, scheduling timeout\n"); 1225 __schedule_osd_timeout(osdc); 1226 } 1227} 1228 1229/* 1230 * called under osdc->request_mutex 1231 */ 1232static void __unregister_request(struct ceph_osd_client *osdc, 1233 struct ceph_osd_request *req) 1234{ 1235 if (RB_EMPTY_NODE(&req->r_node)) { 1236 dout("__unregister_request %p tid %lld not registered\n", 1237 req, req->r_tid); 1238 return; 1239 } 1240 1241 dout("__unregister_request %p tid %lld\n", req, req->r_tid); 1242 rb_erase(&req->r_node, &osdc->requests); 1243 RB_CLEAR_NODE(&req->r_node); 1244 osdc->num_requests--; 1245 1246 if (req->r_osd) { 1247 /* make sure the original request isn't in flight. */ 1248 ceph_msg_revoke(req->r_request); 1249 1250 list_del_init(&req->r_osd_item); 1251 maybe_move_osd_to_lru(osdc, req->r_osd); 1252 if (list_empty(&req->r_linger_osd_item)) 1253 req->r_osd = NULL; 1254 } 1255 1256 list_del_init(&req->r_req_lru_item); 1257 ceph_osdc_put_request(req); 1258 1259 if (osdc->num_requests == 0) { 1260 dout(" no requests, canceling timeout\n"); 1261 __cancel_osd_timeout(osdc); 1262 } 1263} 1264 1265/* 1266 * Cancel a previously queued request message 1267 */ 1268static void __cancel_request(struct ceph_osd_request *req) 1269{ 1270 if (req->r_sent && req->r_osd) { 1271 ceph_msg_revoke(req->r_request); 1272 req->r_sent = 0; 1273 } 1274} 1275 1276static void __register_linger_request(struct ceph_osd_client *osdc, 1277 struct ceph_osd_request *req) 1278{ 1279 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 1280 WARN_ON(!req->r_linger); 1281 1282 ceph_osdc_get_request(req); 1283 list_add_tail(&req->r_linger_item, &osdc->req_linger); 1284 if (req->r_osd) 1285 list_add_tail(&req->r_linger_osd_item, 1286 &req->r_osd->o_linger_requests); 1287} 1288 1289static void __unregister_linger_request(struct ceph_osd_client *osdc, 1290 struct ceph_osd_request *req) 1291{ 1292 WARN_ON(!req->r_linger); 1293 1294 if (list_empty(&req->r_linger_item)) { 1295 dout("%s %p tid %llu not registered\n", __func__, req, 1296 req->r_tid); 1297 return; 1298 } 1299 1300 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 1301 list_del_init(&req->r_linger_item); 1302 1303 if (req->r_osd) { 1304 list_del_init(&req->r_linger_osd_item); 1305 maybe_move_osd_to_lru(osdc, req->r_osd); 1306 if (list_empty(&req->r_osd_item)) 1307 req->r_osd = NULL; 1308 } 1309 ceph_osdc_put_request(req); 1310} 1311 1312void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 1313 struct ceph_osd_request *req) 1314{ 1315 if (!req->r_linger) { 1316 dout("set_request_linger %p\n", req); 1317 req->r_linger = 1; 1318 } 1319} 1320EXPORT_SYMBOL(ceph_osdc_set_request_linger); 1321 1322/* 1323 * Returns whether a request should be blocked from being sent 1324 * based on the current osdmap and osd_client settings. 1325 * 1326 * Caller should hold map_sem for read. 1327 */ 1328static bool __req_should_be_paused(struct ceph_osd_client *osdc, 1329 struct ceph_osd_request *req) 1330{ 1331 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); 1332 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || 1333 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 1334 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) || 1335 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr); 1336} 1337 1338/* 1339 * Calculate mapping of a request to a PG. Takes tiering into account. 1340 */ 1341static int __calc_request_pg(struct ceph_osdmap *osdmap, 1342 struct ceph_osd_request *req, 1343 struct ceph_pg *pg_out) 1344{ 1345 bool need_check_tiering; 1346 1347 need_check_tiering = false; 1348 if (req->r_target_oloc.pool == -1) { 1349 req->r_target_oloc = req->r_base_oloc; /* struct */ 1350 need_check_tiering = true; 1351 } 1352 if (req->r_target_oid.name_len == 0) { 1353 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid); 1354 need_check_tiering = true; 1355 } 1356 1357 if (need_check_tiering && 1358 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1359 struct ceph_pg_pool_info *pi; 1360 1361 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool); 1362 if (pi) { 1363 if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1364 pi->read_tier >= 0) 1365 req->r_target_oloc.pool = pi->read_tier; 1366 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1367 pi->write_tier >= 0) 1368 req->r_target_oloc.pool = pi->write_tier; 1369 } 1370 /* !pi is caught in ceph_oloc_oid_to_pg() */ 1371 } 1372 1373 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc, 1374 &req->r_target_oid, pg_out); 1375} 1376 1377static void __enqueue_request(struct ceph_osd_request *req) 1378{ 1379 struct ceph_osd_client *osdc = req->r_osdc; 1380 1381 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid, 1382 req->r_osd ? req->r_osd->o_osd : -1); 1383 1384 if (req->r_osd) { 1385 __remove_osd_from_lru(req->r_osd); 1386 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); 1387 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent); 1388 } else { 1389 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget); 1390 } 1391} 1392 1393/* 1394 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct 1395 * (as needed), and set the request r_osd appropriately. If there is 1396 * no up osd, set r_osd to NULL. Move the request to the appropriate list 1397 * (unsent, homeless) or leave on in-flight lru. 1398 * 1399 * Return 0 if unchanged, 1 if changed, or negative on error. 1400 * 1401 * Caller should hold map_sem for read and request_mutex. 1402 */ 1403static int __map_request(struct ceph_osd_client *osdc, 1404 struct ceph_osd_request *req, int force_resend) 1405{ 1406 struct ceph_pg pgid; 1407 int acting[CEPH_PG_MAX_SIZE]; 1408 int num, o; 1409 int err; 1410 bool was_paused; 1411 1412 dout("map_request %p tid %lld\n", req, req->r_tid); 1413 1414 err = __calc_request_pg(osdc->osdmap, req, &pgid); 1415 if (err) { 1416 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1417 return err; 1418 } 1419 req->r_pgid = pgid; 1420 1421 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o); 1422 if (num < 0) 1423 num = 0; 1424 1425 was_paused = req->r_paused; 1426 req->r_paused = __req_should_be_paused(osdc, req); 1427 if (was_paused && !req->r_paused) 1428 force_resend = 1; 1429 1430 if ((!force_resend && 1431 req->r_osd && req->r_osd->o_osd == o && 1432 req->r_sent >= req->r_osd->o_incarnation && 1433 req->r_num_pg_osds == num && 1434 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || 1435 (req->r_osd == NULL && o == -1) || 1436 req->r_paused) 1437 return 0; /* no change */ 1438 1439 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n", 1440 req->r_tid, pgid.pool, pgid.seed, o, 1441 req->r_osd ? req->r_osd->o_osd : -1); 1442 1443 /* record full pg acting set */ 1444 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); 1445 req->r_num_pg_osds = num; 1446 1447 if (req->r_osd) { 1448 __cancel_request(req); 1449 list_del_init(&req->r_osd_item); 1450 list_del_init(&req->r_linger_osd_item); 1451 req->r_osd = NULL; 1452 } 1453 1454 req->r_osd = __lookup_osd(osdc, o); 1455 if (!req->r_osd && o >= 0) { 1456 err = -ENOMEM; 1457 req->r_osd = create_osd(osdc, o); 1458 if (!req->r_osd) { 1459 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1460 goto out; 1461 } 1462 1463 dout("map_request osd %p is osd%d\n", req->r_osd, o); 1464 __insert_osd(osdc, req->r_osd); 1465 1466 ceph_con_open(&req->r_osd->o_con, 1467 CEPH_ENTITY_TYPE_OSD, o, 1468 &osdc->osdmap->osd_addr[o]); 1469 } 1470 1471 __enqueue_request(req); 1472 err = 1; /* osd or pg changed */ 1473 1474out: 1475 return err; 1476} 1477 1478/* 1479 * caller should hold map_sem (for read) and request_mutex 1480 */ 1481static void __send_request(struct ceph_osd_client *osdc, 1482 struct ceph_osd_request *req) 1483{ 1484 void *p; 1485 1486 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n", 1487 req, req->r_tid, req->r_osd->o_osd, req->r_flags, 1488 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed); 1489 1490 /* fill in message content that changes each time we send it */ 1491 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch); 1492 put_unaligned_le32(req->r_flags, req->r_request_flags); 1493 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool); 1494 p = req->r_request_pgid; 1495 ceph_encode_64(&p, req->r_pgid.pool); 1496 ceph_encode_32(&p, req->r_pgid.seed); 1497 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */ 1498 memcpy(req->r_request_reassert_version, &req->r_reassert_version, 1499 sizeof(req->r_reassert_version)); 1500 1501 req->r_stamp = jiffies; 1502 list_move_tail(&req->r_req_lru_item, &osdc->req_lru); 1503 1504 ceph_msg_get(req->r_request); /* send consumes a ref */ 1505 1506 req->r_sent = req->r_osd->o_incarnation; 1507 1508 ceph_con_send(&req->r_osd->o_con, req->r_request); 1509} 1510 1511/* 1512 * Send any requests in the queue (req_unsent). 1513 */ 1514static void __send_queued(struct ceph_osd_client *osdc) 1515{ 1516 struct ceph_osd_request *req, *tmp; 1517 1518 dout("__send_queued\n"); 1519 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) 1520 __send_request(osdc, req); 1521} 1522 1523/* 1524 * Caller should hold map_sem for read and request_mutex. 1525 */ 1526static int __ceph_osdc_start_request(struct ceph_osd_client *osdc, 1527 struct ceph_osd_request *req, 1528 bool nofail) 1529{ 1530 int rc; 1531 1532 __register_request(osdc, req); 1533 req->r_sent = 0; 1534 req->r_got_reply = 0; 1535 rc = __map_request(osdc, req, 0); 1536 if (rc < 0) { 1537 if (nofail) { 1538 dout("osdc_start_request failed map, " 1539 " will retry %lld\n", req->r_tid); 1540 rc = 0; 1541 } else { 1542 __unregister_request(osdc, req); 1543 } 1544 return rc; 1545 } 1546 1547 if (req->r_osd == NULL) { 1548 dout("send_request %p no up osds in pg\n", req); 1549 ceph_monc_request_next_osdmap(&osdc->client->monc); 1550 } else { 1551 __send_queued(osdc); 1552 } 1553 1554 return 0; 1555} 1556 1557/* 1558 * Timeout callback, called every N seconds when 1 or more osd 1559 * requests has been active for more than N seconds. When this 1560 * happens, we ping all OSDs with requests who have timed out to 1561 * ensure any communications channel reset is detected. Reset the 1562 * request timeouts another N seconds in the future as we go. 1563 * Reschedule the timeout event another N seconds in future (unless 1564 * there are no open requests). 1565 */ 1566static void handle_timeout(struct work_struct *work) 1567{ 1568 struct ceph_osd_client *osdc = 1569 container_of(work, struct ceph_osd_client, timeout_work.work); 1570 struct ceph_osd_request *req; 1571 struct ceph_osd *osd; 1572 unsigned long keepalive = 1573 osdc->client->options->osd_keepalive_timeout * HZ; 1574 struct list_head slow_osds; 1575 dout("timeout\n"); 1576 down_read(&osdc->map_sem); 1577 1578 ceph_monc_request_next_osdmap(&osdc->client->monc); 1579 1580 mutex_lock(&osdc->request_mutex); 1581 1582 /* 1583 * ping osds that are a bit slow. this ensures that if there 1584 * is a break in the TCP connection we will notice, and reopen 1585 * a connection with that osd (from the fault callback). 1586 */ 1587 INIT_LIST_HEAD(&slow_osds); 1588 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { 1589 if (time_before(jiffies, req->r_stamp + keepalive)) 1590 break; 1591 1592 osd = req->r_osd; 1593 BUG_ON(!osd); 1594 dout(" tid %llu is slow, will send keepalive on osd%d\n", 1595 req->r_tid, osd->o_osd); 1596 list_move_tail(&osd->o_keepalive_item, &slow_osds); 1597 } 1598 while (!list_empty(&slow_osds)) { 1599 osd = list_entry(slow_osds.next, struct ceph_osd, 1600 o_keepalive_item); 1601 list_del_init(&osd->o_keepalive_item); 1602 ceph_con_keepalive(&osd->o_con); 1603 } 1604 1605 __schedule_osd_timeout(osdc); 1606 __send_queued(osdc); 1607 mutex_unlock(&osdc->request_mutex); 1608 up_read(&osdc->map_sem); 1609} 1610 1611static void handle_osds_timeout(struct work_struct *work) 1612{ 1613 struct ceph_osd_client *osdc = 1614 container_of(work, struct ceph_osd_client, 1615 osds_timeout_work.work); 1616 unsigned long delay = 1617 osdc->client->options->osd_idle_ttl * HZ >> 2; 1618 1619 dout("osds timeout\n"); 1620 down_read(&osdc->map_sem); 1621 remove_old_osds(osdc); 1622 up_read(&osdc->map_sem); 1623 1624 schedule_delayed_work(&osdc->osds_timeout_work, 1625 round_jiffies_relative(delay)); 1626} 1627 1628static int ceph_oloc_decode(void **p, void *end, 1629 struct ceph_object_locator *oloc) 1630{ 1631 u8 struct_v, struct_cv; 1632 u32 len; 1633 void *struct_end; 1634 int ret = 0; 1635 1636 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1637 struct_v = ceph_decode_8(p); 1638 struct_cv = ceph_decode_8(p); 1639 if (struct_v < 3) { 1640 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 1641 struct_v, struct_cv); 1642 goto e_inval; 1643 } 1644 if (struct_cv > 6) { 1645 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 1646 struct_v, struct_cv); 1647 goto e_inval; 1648 } 1649 len = ceph_decode_32(p); 1650 ceph_decode_need(p, end, len, e_inval); 1651 struct_end = *p + len; 1652 1653 oloc->pool = ceph_decode_64(p); 1654 *p += 4; /* skip preferred */ 1655 1656 len = ceph_decode_32(p); 1657 if (len > 0) { 1658 pr_warn("ceph_object_locator::key is set\n"); 1659 goto e_inval; 1660 } 1661 1662 if (struct_v >= 5) { 1663 len = ceph_decode_32(p); 1664 if (len > 0) { 1665 pr_warn("ceph_object_locator::nspace is set\n"); 1666 goto e_inval; 1667 } 1668 } 1669 1670 if (struct_v >= 6) { 1671 s64 hash = ceph_decode_64(p); 1672 if (hash != -1) { 1673 pr_warn("ceph_object_locator::hash is set\n"); 1674 goto e_inval; 1675 } 1676 } 1677 1678 /* skip the rest */ 1679 *p = struct_end; 1680out: 1681 return ret; 1682 1683e_inval: 1684 ret = -EINVAL; 1685 goto out; 1686} 1687 1688static int ceph_redirect_decode(void **p, void *end, 1689 struct ceph_request_redirect *redir) 1690{ 1691 u8 struct_v, struct_cv; 1692 u32 len; 1693 void *struct_end; 1694 int ret; 1695 1696 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1697 struct_v = ceph_decode_8(p); 1698 struct_cv = ceph_decode_8(p); 1699 if (struct_cv > 1) { 1700 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 1701 struct_v, struct_cv); 1702 goto e_inval; 1703 } 1704 len = ceph_decode_32(p); 1705 ceph_decode_need(p, end, len, e_inval); 1706 struct_end = *p + len; 1707 1708 ret = ceph_oloc_decode(p, end, &redir->oloc); 1709 if (ret) 1710 goto out; 1711 1712 len = ceph_decode_32(p); 1713 if (len > 0) { 1714 pr_warn("ceph_request_redirect::object_name is set\n"); 1715 goto e_inval; 1716 } 1717 1718 len = ceph_decode_32(p); 1719 *p += len; /* skip osd_instructions */ 1720 1721 /* skip the rest */ 1722 *p = struct_end; 1723out: 1724 return ret; 1725 1726e_inval: 1727 ret = -EINVAL; 1728 goto out; 1729} 1730 1731static void complete_request(struct ceph_osd_request *req) 1732{ 1733 complete_all(&req->r_safe_completion); /* fsync waiter */ 1734} 1735 1736/* 1737 * handle osd op reply. either call the callback if it is specified, 1738 * or do the completion to wake up the waiting thread. 1739 */ 1740static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, 1741 struct ceph_connection *con) 1742{ 1743 void *p, *end; 1744 struct ceph_osd_request *req; 1745 struct ceph_request_redirect redir; 1746 u64 tid; 1747 int object_len; 1748 unsigned int numops; 1749 int payload_len, flags; 1750 s32 result; 1751 s32 retry_attempt; 1752 struct ceph_pg pg; 1753 int err; 1754 u32 reassert_epoch; 1755 u64 reassert_version; 1756 u32 osdmap_epoch; 1757 int already_completed; 1758 u32 bytes; 1759 unsigned int i; 1760 1761 tid = le64_to_cpu(msg->hdr.tid); 1762 dout("handle_reply %p tid %llu\n", msg, tid); 1763 1764 p = msg->front.iov_base; 1765 end = p + msg->front.iov_len; 1766 1767 ceph_decode_need(&p, end, 4, bad); 1768 object_len = ceph_decode_32(&p); 1769 ceph_decode_need(&p, end, object_len, bad); 1770 p += object_len; 1771 1772 err = ceph_decode_pgid(&p, end, &pg); 1773 if (err) 1774 goto bad; 1775 1776 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad); 1777 flags = ceph_decode_64(&p); 1778 result = ceph_decode_32(&p); 1779 reassert_epoch = ceph_decode_32(&p); 1780 reassert_version = ceph_decode_64(&p); 1781 osdmap_epoch = ceph_decode_32(&p); 1782 1783 /* lookup */ 1784 down_read(&osdc->map_sem); 1785 mutex_lock(&osdc->request_mutex); 1786 req = __lookup_request(osdc, tid); 1787 if (req == NULL) { 1788 dout("handle_reply tid %llu dne\n", tid); 1789 goto bad_mutex; 1790 } 1791 ceph_osdc_get_request(req); 1792 1793 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid, 1794 req, result); 1795 1796 ceph_decode_need(&p, end, 4, bad_put); 1797 numops = ceph_decode_32(&p); 1798 if (numops > CEPH_OSD_MAX_OP) 1799 goto bad_put; 1800 if (numops != req->r_num_ops) 1801 goto bad_put; 1802 payload_len = 0; 1803 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put); 1804 for (i = 0; i < numops; i++) { 1805 struct ceph_osd_op *op = p; 1806 int len; 1807 1808 len = le32_to_cpu(op->payload_len); 1809 req->r_reply_op_len[i] = len; 1810 dout(" op %d has %d bytes\n", i, len); 1811 payload_len += len; 1812 p += sizeof(*op); 1813 } 1814 bytes = le32_to_cpu(msg->hdr.data_len); 1815 if (payload_len != bytes) { 1816 pr_warn("sum of op payload lens %d != data_len %d\n", 1817 payload_len, bytes); 1818 goto bad_put; 1819 } 1820 1821 ceph_decode_need(&p, end, 4 + numops * 4, bad_put); 1822 retry_attempt = ceph_decode_32(&p); 1823 for (i = 0; i < numops; i++) 1824 req->r_reply_op_result[i] = ceph_decode_32(&p); 1825 1826 if (le16_to_cpu(msg->hdr.version) >= 6) { 1827 p += 8 + 4; /* skip replay_version */ 1828 p += 8; /* skip user_version */ 1829 1830 err = ceph_redirect_decode(&p, end, &redir); 1831 if (err) 1832 goto bad_put; 1833 } else { 1834 redir.oloc.pool = -1; 1835 } 1836 1837 if (redir.oloc.pool != -1) { 1838 dout("redirect pool %lld\n", redir.oloc.pool); 1839 1840 __unregister_request(osdc, req); 1841 1842 req->r_target_oloc = redir.oloc; /* struct */ 1843 1844 /* 1845 * Start redirect requests with nofail=true. If 1846 * mapping fails, request will end up on the notarget 1847 * list, waiting for the new osdmap (which can take 1848 * a while), even though the original request mapped 1849 * successfully. In the future we might want to follow 1850 * original request's nofail setting here. 1851 */ 1852 err = __ceph_osdc_start_request(osdc, req, true); 1853 BUG_ON(err); 1854 1855 goto out_unlock; 1856 } 1857 1858 already_completed = req->r_got_reply; 1859 if (!req->r_got_reply) { 1860 req->r_result = result; 1861 dout("handle_reply result %d bytes %d\n", req->r_result, 1862 bytes); 1863 if (req->r_result == 0) 1864 req->r_result = bytes; 1865 1866 /* in case this is a write and we need to replay, */ 1867 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch); 1868 req->r_reassert_version.version = cpu_to_le64(reassert_version); 1869 1870 req->r_got_reply = 1; 1871 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { 1872 dout("handle_reply tid %llu dup ack\n", tid); 1873 goto out_unlock; 1874 } 1875 1876 dout("handle_reply tid %llu flags %d\n", tid, flags); 1877 1878 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) 1879 __register_linger_request(osdc, req); 1880 1881 /* either this is a read, or we got the safe response */ 1882 if (result < 0 || 1883 (flags & CEPH_OSD_FLAG_ONDISK) || 1884 ((flags & CEPH_OSD_FLAG_WRITE) == 0)) 1885 __unregister_request(osdc, req); 1886 1887 mutex_unlock(&osdc->request_mutex); 1888 up_read(&osdc->map_sem); 1889 1890 if (!already_completed) { 1891 if (req->r_unsafe_callback && 1892 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK)) 1893 req->r_unsafe_callback(req, true); 1894 if (req->r_callback) 1895 req->r_callback(req, msg); 1896 else 1897 complete_all(&req->r_completion); 1898 } 1899 1900 if (flags & CEPH_OSD_FLAG_ONDISK) { 1901 if (req->r_unsafe_callback && already_completed) 1902 req->r_unsafe_callback(req, false); 1903 complete_request(req); 1904 } 1905 1906out: 1907 dout("req=%p req->r_linger=%d\n", req, req->r_linger); 1908 ceph_osdc_put_request(req); 1909 return; 1910out_unlock: 1911 mutex_unlock(&osdc->request_mutex); 1912 up_read(&osdc->map_sem); 1913 goto out; 1914 1915bad_put: 1916 req->r_result = -EIO; 1917 __unregister_request(osdc, req); 1918 if (req->r_callback) 1919 req->r_callback(req, msg); 1920 else 1921 complete_all(&req->r_completion); 1922 complete_request(req); 1923 ceph_osdc_put_request(req); 1924bad_mutex: 1925 mutex_unlock(&osdc->request_mutex); 1926 up_read(&osdc->map_sem); 1927bad: 1928 pr_err("corrupt osd_op_reply got %d %d\n", 1929 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len)); 1930 ceph_msg_dump(msg); 1931} 1932 1933static void reset_changed_osds(struct ceph_osd_client *osdc) 1934{ 1935 struct rb_node *p, *n; 1936 1937 dout("%s %p\n", __func__, osdc); 1938 for (p = rb_first(&osdc->osds); p; p = n) { 1939 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); 1940 1941 n = rb_next(p); 1942 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 1943 memcmp(&osd->o_con.peer_addr, 1944 ceph_osd_addr(osdc->osdmap, 1945 osd->o_osd), 1946 sizeof(struct ceph_entity_addr)) != 0) 1947 __reset_osd(osdc, osd); 1948 } 1949} 1950 1951/* 1952 * Requeue requests whose mapping to an OSD has changed. If requests map to 1953 * no osd, request a new map. 1954 * 1955 * Caller should hold map_sem for read. 1956 */ 1957static void kick_requests(struct ceph_osd_client *osdc, bool force_resend, 1958 bool force_resend_writes) 1959{ 1960 struct ceph_osd_request *req, *nreq; 1961 struct rb_node *p; 1962 int needmap = 0; 1963 int err; 1964 bool force_resend_req; 1965 1966 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "", 1967 force_resend_writes ? " (force resend writes)" : ""); 1968 mutex_lock(&osdc->request_mutex); 1969 for (p = rb_first(&osdc->requests); p; ) { 1970 req = rb_entry(p, struct ceph_osd_request, r_node); 1971 p = rb_next(p); 1972 1973 /* 1974 * For linger requests that have not yet been 1975 * registered, move them to the linger list; they'll 1976 * be sent to the osd in the loop below. Unregister 1977 * the request before re-registering it as a linger 1978 * request to ensure the __map_request() below 1979 * will decide it needs to be sent. 1980 */ 1981 if (req->r_linger && list_empty(&req->r_linger_item)) { 1982 dout("%p tid %llu restart on osd%d\n", 1983 req, req->r_tid, 1984 req->r_osd ? req->r_osd->o_osd : -1); 1985 ceph_osdc_get_request(req); 1986 __unregister_request(osdc, req); 1987 __register_linger_request(osdc, req); 1988 ceph_osdc_put_request(req); 1989 continue; 1990 } 1991 1992 force_resend_req = force_resend || 1993 (force_resend_writes && 1994 req->r_flags & CEPH_OSD_FLAG_WRITE); 1995 err = __map_request(osdc, req, force_resend_req); 1996 if (err < 0) 1997 continue; /* error */ 1998 if (req->r_osd == NULL) { 1999 dout("%p tid %llu maps to no osd\n", req, req->r_tid); 2000 needmap++; /* request a newer map */ 2001 } else if (err > 0) { 2002 if (!req->r_linger) { 2003 dout("%p tid %llu requeued on osd%d\n", req, 2004 req->r_tid, 2005 req->r_osd ? req->r_osd->o_osd : -1); 2006 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2007 } 2008 } 2009 } 2010 2011 list_for_each_entry_safe(req, nreq, &osdc->req_linger, 2012 r_linger_item) { 2013 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); 2014 2015 err = __map_request(osdc, req, 2016 force_resend || force_resend_writes); 2017 dout("__map_request returned %d\n", err); 2018 if (err < 0) 2019 continue; /* hrm! */ 2020 if (req->r_osd == NULL || err > 0) { 2021 if (req->r_osd == NULL) { 2022 dout("lingering %p tid %llu maps to no osd\n", 2023 req, req->r_tid); 2024 /* 2025 * A homeless lingering request makes 2026 * no sense, as it's job is to keep 2027 * a particular OSD connection open. 2028 * Request a newer map and kick the 2029 * request, knowing that it won't be 2030 * resent until we actually get a map 2031 * that can tell us where to send it. 2032 */ 2033 needmap++; 2034 } 2035 2036 dout("kicking lingering %p tid %llu osd%d\n", req, 2037 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1); 2038 __register_request(osdc, req); 2039 __unregister_linger_request(osdc, req); 2040 } 2041 } 2042 reset_changed_osds(osdc); 2043 mutex_unlock(&osdc->request_mutex); 2044 2045 if (needmap) { 2046 dout("%d requests for down osds, need new map\n", needmap); 2047 ceph_monc_request_next_osdmap(&osdc->client->monc); 2048 } 2049} 2050 2051 2052/* 2053 * Process updated osd map. 2054 * 2055 * The message contains any number of incremental and full maps, normally 2056 * indicating some sort of topology change in the cluster. Kick requests 2057 * off to different OSDs as needed. 2058 */ 2059void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 2060{ 2061 void *p, *end, *next; 2062 u32 nr_maps, maplen; 2063 u32 epoch; 2064 struct ceph_osdmap *newmap = NULL, *oldmap; 2065 int err; 2066 struct ceph_fsid fsid; 2067 bool was_full; 2068 2069 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); 2070 p = msg->front.iov_base; 2071 end = p + msg->front.iov_len; 2072 2073 /* verify fsid */ 2074 ceph_decode_need(&p, end, sizeof(fsid), bad); 2075 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 2076 if (ceph_check_fsid(osdc->client, &fsid) < 0) 2077 return; 2078 2079 down_write(&osdc->map_sem); 2080 2081 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 2082 2083 /* incremental maps */ 2084 ceph_decode_32_safe(&p, end, nr_maps, bad); 2085 dout(" %d inc maps\n", nr_maps); 2086 while (nr_maps > 0) { 2087 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2088 epoch = ceph_decode_32(&p); 2089 maplen = ceph_decode_32(&p); 2090 ceph_decode_need(&p, end, maplen, bad); 2091 next = p + maplen; 2092 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { 2093 dout("applying incremental map %u len %d\n", 2094 epoch, maplen); 2095 newmap = osdmap_apply_incremental(&p, next, 2096 osdc->osdmap, 2097 &osdc->client->msgr); 2098 if (IS_ERR(newmap)) { 2099 err = PTR_ERR(newmap); 2100 goto bad; 2101 } 2102 BUG_ON(!newmap); 2103 if (newmap != osdc->osdmap) { 2104 ceph_osdmap_destroy(osdc->osdmap); 2105 osdc->osdmap = newmap; 2106 } 2107 was_full = was_full || 2108 ceph_osdmap_flag(osdc->osdmap, 2109 CEPH_OSDMAP_FULL); 2110 kick_requests(osdc, 0, was_full); 2111 } else { 2112 dout("ignoring incremental map %u len %d\n", 2113 epoch, maplen); 2114 } 2115 p = next; 2116 nr_maps--; 2117 } 2118 if (newmap) 2119 goto done; 2120 2121 /* full maps */ 2122 ceph_decode_32_safe(&p, end, nr_maps, bad); 2123 dout(" %d full maps\n", nr_maps); 2124 while (nr_maps) { 2125 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2126 epoch = ceph_decode_32(&p); 2127 maplen = ceph_decode_32(&p); 2128 ceph_decode_need(&p, end, maplen, bad); 2129 if (nr_maps > 1) { 2130 dout("skipping non-latest full map %u len %d\n", 2131 epoch, maplen); 2132 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { 2133 dout("skipping full map %u len %d, " 2134 "older than our %u\n", epoch, maplen, 2135 osdc->osdmap->epoch); 2136 } else { 2137 int skipped_map = 0; 2138 2139 dout("taking full map %u len %d\n", epoch, maplen); 2140 newmap = ceph_osdmap_decode(&p, p+maplen); 2141 if (IS_ERR(newmap)) { 2142 err = PTR_ERR(newmap); 2143 goto bad; 2144 } 2145 BUG_ON(!newmap); 2146 oldmap = osdc->osdmap; 2147 osdc->osdmap = newmap; 2148 if (oldmap) { 2149 if (oldmap->epoch + 1 < newmap->epoch) 2150 skipped_map = 1; 2151 ceph_osdmap_destroy(oldmap); 2152 } 2153 was_full = was_full || 2154 ceph_osdmap_flag(osdc->osdmap, 2155 CEPH_OSDMAP_FULL); 2156 kick_requests(osdc, skipped_map, was_full); 2157 } 2158 p += maplen; 2159 nr_maps--; 2160 } 2161 2162 if (!osdc->osdmap) 2163 goto bad; 2164done: 2165 downgrade_write(&osdc->map_sem); 2166 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); 2167 2168 /* 2169 * subscribe to subsequent osdmap updates if full to ensure 2170 * we find out when we are no longer full and stop returning 2171 * ENOSPC. 2172 */ 2173 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 2174 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) || 2175 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) 2176 ceph_monc_request_next_osdmap(&osdc->client->monc); 2177 2178 mutex_lock(&osdc->request_mutex); 2179 __send_queued(osdc); 2180 mutex_unlock(&osdc->request_mutex); 2181 up_read(&osdc->map_sem); 2182 wake_up_all(&osdc->client->auth_wq); 2183 return; 2184 2185bad: 2186 pr_err("osdc handle_map corrupt msg\n"); 2187 ceph_msg_dump(msg); 2188 up_write(&osdc->map_sem); 2189} 2190 2191/* 2192 * watch/notify callback event infrastructure 2193 * 2194 * These callbacks are used both for watch and notify operations. 2195 */ 2196static void __release_event(struct kref *kref) 2197{ 2198 struct ceph_osd_event *event = 2199 container_of(kref, struct ceph_osd_event, kref); 2200 2201 dout("__release_event %p\n", event); 2202 kfree(event); 2203} 2204 2205static void get_event(struct ceph_osd_event *event) 2206{ 2207 kref_get(&event->kref); 2208} 2209 2210void ceph_osdc_put_event(struct ceph_osd_event *event) 2211{ 2212 kref_put(&event->kref, __release_event); 2213} 2214EXPORT_SYMBOL(ceph_osdc_put_event); 2215 2216static void __insert_event(struct ceph_osd_client *osdc, 2217 struct ceph_osd_event *new) 2218{ 2219 struct rb_node **p = &osdc->event_tree.rb_node; 2220 struct rb_node *parent = NULL; 2221 struct ceph_osd_event *event = NULL; 2222 2223 while (*p) { 2224 parent = *p; 2225 event = rb_entry(parent, struct ceph_osd_event, node); 2226 if (new->cookie < event->cookie) 2227 p = &(*p)->rb_left; 2228 else if (new->cookie > event->cookie) 2229 p = &(*p)->rb_right; 2230 else 2231 BUG(); 2232 } 2233 2234 rb_link_node(&new->node, parent, p); 2235 rb_insert_color(&new->node, &osdc->event_tree); 2236} 2237 2238static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, 2239 u64 cookie) 2240{ 2241 struct rb_node **p = &osdc->event_tree.rb_node; 2242 struct rb_node *parent = NULL; 2243 struct ceph_osd_event *event = NULL; 2244 2245 while (*p) { 2246 parent = *p; 2247 event = rb_entry(parent, struct ceph_osd_event, node); 2248 if (cookie < event->cookie) 2249 p = &(*p)->rb_left; 2250 else if (cookie > event->cookie) 2251 p = &(*p)->rb_right; 2252 else 2253 return event; 2254 } 2255 return NULL; 2256} 2257 2258static void __remove_event(struct ceph_osd_event *event) 2259{ 2260 struct ceph_osd_client *osdc = event->osdc; 2261 2262 if (!RB_EMPTY_NODE(&event->node)) { 2263 dout("__remove_event removed %p\n", event); 2264 rb_erase(&event->node, &osdc->event_tree); 2265 ceph_osdc_put_event(event); 2266 } else { 2267 dout("__remove_event didn't remove %p\n", event); 2268 } 2269} 2270 2271int ceph_osdc_create_event(struct ceph_osd_client *osdc, 2272 void (*event_cb)(u64, u64, u8, void *), 2273 void *data, struct ceph_osd_event **pevent) 2274{ 2275 struct ceph_osd_event *event; 2276 2277 event = kmalloc(sizeof(*event), GFP_NOIO); 2278 if (!event) 2279 return -ENOMEM; 2280 2281 dout("create_event %p\n", event); 2282 event->cb = event_cb; 2283 event->one_shot = 0; 2284 event->data = data; 2285 event->osdc = osdc; 2286 INIT_LIST_HEAD(&event->osd_node); 2287 RB_CLEAR_NODE(&event->node); 2288 kref_init(&event->kref); /* one ref for us */ 2289 kref_get(&event->kref); /* one ref for the caller */ 2290 2291 spin_lock(&osdc->event_lock); 2292 event->cookie = ++osdc->event_count; 2293 __insert_event(osdc, event); 2294 spin_unlock(&osdc->event_lock); 2295 2296 *pevent = event; 2297 return 0; 2298} 2299EXPORT_SYMBOL(ceph_osdc_create_event); 2300 2301void ceph_osdc_cancel_event(struct ceph_osd_event *event) 2302{ 2303 struct ceph_osd_client *osdc = event->osdc; 2304 2305 dout("cancel_event %p\n", event); 2306 spin_lock(&osdc->event_lock); 2307 __remove_event(event); 2308 spin_unlock(&osdc->event_lock); 2309 ceph_osdc_put_event(event); /* caller's */ 2310} 2311EXPORT_SYMBOL(ceph_osdc_cancel_event); 2312 2313 2314static void do_event_work(struct work_struct *work) 2315{ 2316 struct ceph_osd_event_work *event_work = 2317 container_of(work, struct ceph_osd_event_work, work); 2318 struct ceph_osd_event *event = event_work->event; 2319 u64 ver = event_work->ver; 2320 u64 notify_id = event_work->notify_id; 2321 u8 opcode = event_work->opcode; 2322 2323 dout("do_event_work completing %p\n", event); 2324 event->cb(ver, notify_id, opcode, event->data); 2325 dout("do_event_work completed %p\n", event); 2326 ceph_osdc_put_event(event); 2327 kfree(event_work); 2328} 2329 2330 2331/* 2332 * Process osd watch notifications 2333 */ 2334static void handle_watch_notify(struct ceph_osd_client *osdc, 2335 struct ceph_msg *msg) 2336{ 2337 void *p, *end; 2338 u8 proto_ver; 2339 u64 cookie, ver, notify_id; 2340 u8 opcode; 2341 struct ceph_osd_event *event; 2342 struct ceph_osd_event_work *event_work; 2343 2344 p = msg->front.iov_base; 2345 end = p + msg->front.iov_len; 2346 2347 ceph_decode_8_safe(&p, end, proto_ver, bad); 2348 ceph_decode_8_safe(&p, end, opcode, bad); 2349 ceph_decode_64_safe(&p, end, cookie, bad); 2350 ceph_decode_64_safe(&p, end, ver, bad); 2351 ceph_decode_64_safe(&p, end, notify_id, bad); 2352 2353 spin_lock(&osdc->event_lock); 2354 event = __find_event(osdc, cookie); 2355 if (event) { 2356 BUG_ON(event->one_shot); 2357 get_event(event); 2358 } 2359 spin_unlock(&osdc->event_lock); 2360 dout("handle_watch_notify cookie %lld ver %lld event %p\n", 2361 cookie, ver, event); 2362 if (event) { 2363 event_work = kmalloc(sizeof(*event_work), GFP_NOIO); 2364 if (!event_work) { 2365 pr_err("couldn't allocate event_work\n"); 2366 ceph_osdc_put_event(event); 2367 return; 2368 } 2369 INIT_WORK(&event_work->work, do_event_work); 2370 event_work->event = event; 2371 event_work->ver = ver; 2372 event_work->notify_id = notify_id; 2373 event_work->opcode = opcode; 2374 2375 queue_work(osdc->notify_wq, &event_work->work); 2376 } 2377 2378 return; 2379 2380bad: 2381 pr_err("osdc handle_watch_notify corrupt msg\n"); 2382} 2383 2384/* 2385 * build new request AND message 2386 * 2387 */ 2388void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 2389 struct ceph_snap_context *snapc, u64 snap_id, 2390 struct timespec *mtime) 2391{ 2392 struct ceph_msg *msg = req->r_request; 2393 void *p; 2394 size_t msg_size; 2395 int flags = req->r_flags; 2396 u64 data_len; 2397 unsigned int i; 2398 2399 req->r_snapid = snap_id; 2400 req->r_snapc = ceph_get_snap_context(snapc); 2401 2402 /* encode request */ 2403 msg->hdr.version = cpu_to_le16(4); 2404 2405 p = msg->front.iov_base; 2406 ceph_encode_32(&p, 1); /* client_inc is always 1 */ 2407 req->r_request_osdmap_epoch = p; 2408 p += 4; 2409 req->r_request_flags = p; 2410 p += 4; 2411 if (req->r_flags & CEPH_OSD_FLAG_WRITE) 2412 ceph_encode_timespec(p, mtime); 2413 p += sizeof(struct ceph_timespec); 2414 req->r_request_reassert_version = p; 2415 p += sizeof(struct ceph_eversion); /* will get filled in */ 2416 2417 /* oloc */ 2418 ceph_encode_8(&p, 4); 2419 ceph_encode_8(&p, 4); 2420 ceph_encode_32(&p, 8 + 4 + 4); 2421 req->r_request_pool = p; 2422 p += 8; 2423 ceph_encode_32(&p, -1); /* preferred */ 2424 ceph_encode_32(&p, 0); /* key len */ 2425 2426 ceph_encode_8(&p, 1); 2427 req->r_request_pgid = p; 2428 p += 8 + 4; 2429 ceph_encode_32(&p, -1); /* preferred */ 2430 2431 /* oid */ 2432 ceph_encode_32(&p, req->r_base_oid.name_len); 2433 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len); 2434 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len, 2435 req->r_base_oid.name, req->r_base_oid.name_len); 2436 p += req->r_base_oid.name_len; 2437 2438 /* ops--can imply data */ 2439 ceph_encode_16(&p, (u16)req->r_num_ops); 2440 data_len = 0; 2441 for (i = 0; i < req->r_num_ops; i++) { 2442 data_len += osd_req_encode_op(req, p, i); 2443 p += sizeof(struct ceph_osd_op); 2444 } 2445 2446 /* snaps */ 2447 ceph_encode_64(&p, req->r_snapid); 2448 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0); 2449 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0); 2450 if (req->r_snapc) { 2451 for (i = 0; i < snapc->num_snaps; i++) { 2452 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2453 } 2454 } 2455 2456 req->r_request_attempts = p; 2457 p += 4; 2458 2459 /* data */ 2460 if (flags & CEPH_OSD_FLAG_WRITE) { 2461 u16 data_off; 2462 2463 /* 2464 * The header "data_off" is a hint to the receiver 2465 * allowing it to align received data into its 2466 * buffers such that there's no need to re-copy 2467 * it before writing it to disk (direct I/O). 2468 */ 2469 data_off = (u16) (off & 0xffff); 2470 req->r_request->hdr.data_off = cpu_to_le16(data_off); 2471 } 2472 req->r_request->hdr.data_len = cpu_to_le32(data_len); 2473 2474 BUG_ON(p > msg->front.iov_base + msg->front.iov_len); 2475 msg_size = p - msg->front.iov_base; 2476 msg->front.iov_len = msg_size; 2477 msg->hdr.front_len = cpu_to_le32(msg_size); 2478 2479 dout("build_request msg_size was %d\n", (int)msg_size); 2480} 2481EXPORT_SYMBOL(ceph_osdc_build_request); 2482 2483/* 2484 * Register request, send initial attempt. 2485 */ 2486int ceph_osdc_start_request(struct ceph_osd_client *osdc, 2487 struct ceph_osd_request *req, 2488 bool nofail) 2489{ 2490 int rc; 2491 2492 down_read(&osdc->map_sem); 2493 mutex_lock(&osdc->request_mutex); 2494 2495 rc = __ceph_osdc_start_request(osdc, req, nofail); 2496 2497 mutex_unlock(&osdc->request_mutex); 2498 up_read(&osdc->map_sem); 2499 2500 return rc; 2501} 2502EXPORT_SYMBOL(ceph_osdc_start_request); 2503 2504/* 2505 * Unregister a registered request. The request is not completed (i.e. 2506 * no callbacks or wakeups) - higher layers are supposed to know what 2507 * they are canceling. 2508 */ 2509void ceph_osdc_cancel_request(struct ceph_osd_request *req) 2510{ 2511 struct ceph_osd_client *osdc = req->r_osdc; 2512 2513 mutex_lock(&osdc->request_mutex); 2514 if (req->r_linger) 2515 __unregister_linger_request(osdc, req); 2516 __unregister_request(osdc, req); 2517 mutex_unlock(&osdc->request_mutex); 2518 2519 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid); 2520} 2521EXPORT_SYMBOL(ceph_osdc_cancel_request); 2522 2523/* 2524 * wait for a request to complete 2525 */ 2526int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 2527 struct ceph_osd_request *req) 2528{ 2529 int rc; 2530 2531 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 2532 2533 rc = wait_for_completion_interruptible(&req->r_completion); 2534 if (rc < 0) { 2535 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid); 2536 ceph_osdc_cancel_request(req); 2537 complete_request(req); 2538 return rc; 2539 } 2540 2541 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid, 2542 req->r_result); 2543 return req->r_result; 2544} 2545EXPORT_SYMBOL(ceph_osdc_wait_request); 2546 2547/* 2548 * sync - wait for all in-flight requests to flush. avoid starvation. 2549 */ 2550void ceph_osdc_sync(struct ceph_osd_client *osdc) 2551{ 2552 struct ceph_osd_request *req; 2553 u64 last_tid, next_tid = 0; 2554 2555 mutex_lock(&osdc->request_mutex); 2556 last_tid = osdc->last_tid; 2557 while (1) { 2558 req = __lookup_request_ge(osdc, next_tid); 2559 if (!req) 2560 break; 2561 if (req->r_tid > last_tid) 2562 break; 2563 2564 next_tid = req->r_tid + 1; 2565 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) 2566 continue; 2567 2568 ceph_osdc_get_request(req); 2569 mutex_unlock(&osdc->request_mutex); 2570 dout("sync waiting on tid %llu (last is %llu)\n", 2571 req->r_tid, last_tid); 2572 wait_for_completion(&req->r_safe_completion); 2573 mutex_lock(&osdc->request_mutex); 2574 ceph_osdc_put_request(req); 2575 } 2576 mutex_unlock(&osdc->request_mutex); 2577 dout("sync done (thru tid %llu)\n", last_tid); 2578} 2579EXPORT_SYMBOL(ceph_osdc_sync); 2580 2581/* 2582 * Call all pending notify callbacks - for use after a watch is 2583 * unregistered, to make sure no more callbacks for it will be invoked 2584 */ 2585void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 2586{ 2587 flush_workqueue(osdc->notify_wq); 2588} 2589EXPORT_SYMBOL(ceph_osdc_flush_notifies); 2590 2591 2592/* 2593 * init, shutdown 2594 */ 2595int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 2596{ 2597 int err; 2598 2599 dout("init\n"); 2600 osdc->client = client; 2601 osdc->osdmap = NULL; 2602 init_rwsem(&osdc->map_sem); 2603 init_completion(&osdc->map_waiters); 2604 osdc->last_requested_map = 0; 2605 mutex_init(&osdc->request_mutex); 2606 osdc->last_tid = 0; 2607 osdc->osds = RB_ROOT; 2608 INIT_LIST_HEAD(&osdc->osd_lru); 2609 osdc->requests = RB_ROOT; 2610 INIT_LIST_HEAD(&osdc->req_lru); 2611 INIT_LIST_HEAD(&osdc->req_unsent); 2612 INIT_LIST_HEAD(&osdc->req_notarget); 2613 INIT_LIST_HEAD(&osdc->req_linger); 2614 osdc->num_requests = 0; 2615 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 2616 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 2617 spin_lock_init(&osdc->event_lock); 2618 osdc->event_tree = RB_ROOT; 2619 osdc->event_count = 0; 2620 2621 schedule_delayed_work(&osdc->osds_timeout_work, 2622 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); 2623 2624 err = -ENOMEM; 2625 osdc->req_mempool = mempool_create_kmalloc_pool(10, 2626 sizeof(struct ceph_osd_request)); 2627 if (!osdc->req_mempool) 2628 goto out; 2629 2630 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 2631 OSD_OP_FRONT_LEN, 10, true, 2632 "osd_op"); 2633 if (err < 0) 2634 goto out_mempool; 2635 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 2636 OSD_OPREPLY_FRONT_LEN, 10, true, 2637 "osd_op_reply"); 2638 if (err < 0) 2639 goto out_msgpool; 2640 2641 err = -ENOMEM; 2642 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 2643 if (!osdc->notify_wq) 2644 goto out_msgpool_reply; 2645 2646 return 0; 2647 2648out_msgpool_reply: 2649 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2650out_msgpool: 2651 ceph_msgpool_destroy(&osdc->msgpool_op); 2652out_mempool: 2653 mempool_destroy(osdc->req_mempool); 2654out: 2655 return err; 2656} 2657 2658void ceph_osdc_stop(struct ceph_osd_client *osdc) 2659{ 2660 flush_workqueue(osdc->notify_wq); 2661 destroy_workqueue(osdc->notify_wq); 2662 cancel_delayed_work_sync(&osdc->timeout_work); 2663 cancel_delayed_work_sync(&osdc->osds_timeout_work); 2664 if (osdc->osdmap) { 2665 ceph_osdmap_destroy(osdc->osdmap); 2666 osdc->osdmap = NULL; 2667 } 2668 remove_all_osds(osdc); 2669 mempool_destroy(osdc->req_mempool); 2670 ceph_msgpool_destroy(&osdc->msgpool_op); 2671 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2672} 2673 2674/* 2675 * Read some contiguous pages. If we cross a stripe boundary, shorten 2676 * *plen. Return number of bytes read, or error. 2677 */ 2678int ceph_osdc_readpages(struct ceph_osd_client *osdc, 2679 struct ceph_vino vino, struct ceph_file_layout *layout, 2680 u64 off, u64 *plen, 2681 u32 truncate_seq, u64 truncate_size, 2682 struct page **pages, int num_pages, int page_align) 2683{ 2684 struct ceph_osd_request *req; 2685 int rc = 0; 2686 2687 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 2688 vino.snap, off, *plen); 2689 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 2690 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 2691 NULL, truncate_seq, truncate_size, 2692 false); 2693 if (IS_ERR(req)) 2694 return PTR_ERR(req); 2695 2696 /* it may be a short read due to an object boundary */ 2697 2698 osd_req_op_extent_osd_data_pages(req, 0, 2699 pages, *plen, page_align, false, false); 2700 2701 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 2702 off, *plen, *plen, page_align); 2703 2704 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL); 2705 2706 rc = ceph_osdc_start_request(osdc, req, false); 2707 if (!rc) 2708 rc = ceph_osdc_wait_request(osdc, req); 2709 2710 ceph_osdc_put_request(req); 2711 dout("readpages result %d\n", rc); 2712 return rc; 2713} 2714EXPORT_SYMBOL(ceph_osdc_readpages); 2715 2716/* 2717 * do a synchronous write on N pages 2718 */ 2719int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 2720 struct ceph_file_layout *layout, 2721 struct ceph_snap_context *snapc, 2722 u64 off, u64 len, 2723 u32 truncate_seq, u64 truncate_size, 2724 struct timespec *mtime, 2725 struct page **pages, int num_pages) 2726{ 2727 struct ceph_osd_request *req; 2728 int rc = 0; 2729 int page_align = off & ~PAGE_MASK; 2730 2731 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */ 2732 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 2733 CEPH_OSD_OP_WRITE, 2734 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 2735 snapc, truncate_seq, truncate_size, 2736 true); 2737 if (IS_ERR(req)) 2738 return PTR_ERR(req); 2739 2740 /* it may be a short write due to an object boundary */ 2741 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 2742 false, false); 2743 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 2744 2745 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime); 2746 2747 rc = ceph_osdc_start_request(osdc, req, true); 2748 if (!rc) 2749 rc = ceph_osdc_wait_request(osdc, req); 2750 2751 ceph_osdc_put_request(req); 2752 if (rc == 0) 2753 rc = len; 2754 dout("writepages result %d\n", rc); 2755 return rc; 2756} 2757EXPORT_SYMBOL(ceph_osdc_writepages); 2758 2759int ceph_osdc_setup(void) 2760{ 2761 BUG_ON(ceph_osd_request_cache); 2762 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", 2763 sizeof (struct ceph_osd_request), 2764 __alignof__(struct ceph_osd_request), 2765 0, NULL); 2766 2767 return ceph_osd_request_cache ? 0 : -ENOMEM; 2768} 2769EXPORT_SYMBOL(ceph_osdc_setup); 2770 2771void ceph_osdc_cleanup(void) 2772{ 2773 BUG_ON(!ceph_osd_request_cache); 2774 kmem_cache_destroy(ceph_osd_request_cache); 2775 ceph_osd_request_cache = NULL; 2776} 2777EXPORT_SYMBOL(ceph_osdc_cleanup); 2778 2779/* 2780 * handle incoming message 2781 */ 2782static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 2783{ 2784 struct ceph_osd *osd = con->private; 2785 struct ceph_osd_client *osdc; 2786 int type = le16_to_cpu(msg->hdr.type); 2787 2788 if (!osd) 2789 goto out; 2790 osdc = osd->o_osdc; 2791 2792 switch (type) { 2793 case CEPH_MSG_OSD_MAP: 2794 ceph_osdc_handle_map(osdc, msg); 2795 break; 2796 case CEPH_MSG_OSD_OPREPLY: 2797 handle_reply(osdc, msg, con); 2798 break; 2799 case CEPH_MSG_WATCH_NOTIFY: 2800 handle_watch_notify(osdc, msg); 2801 break; 2802 2803 default: 2804 pr_err("received unknown message type %d %s\n", type, 2805 ceph_msg_type_name(type)); 2806 } 2807out: 2808 ceph_msg_put(msg); 2809} 2810 2811/* 2812 * lookup and return message for incoming reply. set up reply message 2813 * pages. 2814 */ 2815static struct ceph_msg *get_reply(struct ceph_connection *con, 2816 struct ceph_msg_header *hdr, 2817 int *skip) 2818{ 2819 struct ceph_osd *osd = con->private; 2820 struct ceph_osd_client *osdc = osd->o_osdc; 2821 struct ceph_msg *m; 2822 struct ceph_osd_request *req; 2823 int front_len = le32_to_cpu(hdr->front_len); 2824 int data_len = le32_to_cpu(hdr->data_len); 2825 u64 tid; 2826 2827 tid = le64_to_cpu(hdr->tid); 2828 mutex_lock(&osdc->request_mutex); 2829 req = __lookup_request(osdc, tid); 2830 if (!req) { 2831 *skip = 1; 2832 m = NULL; 2833 dout("get_reply unknown tid %llu from osd%d\n", tid, 2834 osd->o_osd); 2835 goto out; 2836 } 2837 2838 if (req->r_reply->con) 2839 dout("%s revoking msg %p from old con %p\n", __func__, 2840 req->r_reply, req->r_reply->con); 2841 ceph_msg_revoke_incoming(req->r_reply); 2842 2843 if (front_len > req->r_reply->front_alloc_len) { 2844 pr_warn("get_reply front %d > preallocated %d (%u#%llu)\n", 2845 front_len, req->r_reply->front_alloc_len, 2846 (unsigned int)con->peer_name.type, 2847 le64_to_cpu(con->peer_name.num)); 2848 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 2849 false); 2850 if (!m) 2851 goto out; 2852 ceph_msg_put(req->r_reply); 2853 req->r_reply = m; 2854 } 2855 m = ceph_msg_get(req->r_reply); 2856 2857 if (data_len > 0) { 2858 struct ceph_osd_data *osd_data; 2859 2860 /* 2861 * XXX This is assuming there is only one op containing 2862 * XXX page data. Probably OK for reads, but this 2863 * XXX ought to be done more generally. 2864 */ 2865 osd_data = osd_req_op_extent_osd_data(req, 0); 2866 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 2867 if (osd_data->pages && 2868 unlikely(osd_data->length < data_len)) { 2869 2870 pr_warn("tid %lld reply has %d bytes we had only %llu bytes ready\n", 2871 tid, data_len, osd_data->length); 2872 *skip = 1; 2873 ceph_msg_put(m); 2874 m = NULL; 2875 goto out; 2876 } 2877 } 2878 } 2879 *skip = 0; 2880 dout("get_reply tid %lld %p\n", tid, m); 2881 2882out: 2883 mutex_unlock(&osdc->request_mutex); 2884 return m; 2885 2886} 2887 2888static struct ceph_msg *alloc_msg(struct ceph_connection *con, 2889 struct ceph_msg_header *hdr, 2890 int *skip) 2891{ 2892 struct ceph_osd *osd = con->private; 2893 int type = le16_to_cpu(hdr->type); 2894 int front = le32_to_cpu(hdr->front_len); 2895 2896 *skip = 0; 2897 switch (type) { 2898 case CEPH_MSG_OSD_MAP: 2899 case CEPH_MSG_WATCH_NOTIFY: 2900 return ceph_msg_new(type, front, GFP_NOFS, false); 2901 case CEPH_MSG_OSD_OPREPLY: 2902 return get_reply(con, hdr, skip); 2903 default: 2904 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, 2905 osd->o_osd); 2906 *skip = 1; 2907 return NULL; 2908 } 2909} 2910 2911/* 2912 * Wrappers to refcount containing ceph_osd struct 2913 */ 2914static struct ceph_connection *get_osd_con(struct ceph_connection *con) 2915{ 2916 struct ceph_osd *osd = con->private; 2917 if (get_osd(osd)) 2918 return con; 2919 return NULL; 2920} 2921 2922static void put_osd_con(struct ceph_connection *con) 2923{ 2924 struct ceph_osd *osd = con->private; 2925 put_osd(osd); 2926} 2927 2928/* 2929 * authentication 2930 */ 2931/* 2932 * Note: returned pointer is the address of a structure that's 2933 * managed separately. Caller must *not* attempt to free it. 2934 */ 2935static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 2936 int *proto, int force_new) 2937{ 2938 struct ceph_osd *o = con->private; 2939 struct ceph_osd_client *osdc = o->o_osdc; 2940 struct ceph_auth_client *ac = osdc->client->monc.auth; 2941 struct ceph_auth_handshake *auth = &o->o_auth; 2942 2943 if (force_new && auth->authorizer) { 2944 ceph_auth_destroy_authorizer(ac, auth->authorizer); 2945 auth->authorizer = NULL; 2946 } 2947 if (!auth->authorizer) { 2948 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2949 auth); 2950 if (ret) 2951 return ERR_PTR(ret); 2952 } else { 2953 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2954 auth); 2955 if (ret) 2956 return ERR_PTR(ret); 2957 } 2958 *proto = ac->protocol; 2959 2960 return auth; 2961} 2962 2963 2964static int verify_authorizer_reply(struct ceph_connection *con, int len) 2965{ 2966 struct ceph_osd *o = con->private; 2967 struct ceph_osd_client *osdc = o->o_osdc; 2968 struct ceph_auth_client *ac = osdc->client->monc.auth; 2969 2970 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); 2971} 2972 2973static int invalidate_authorizer(struct ceph_connection *con) 2974{ 2975 struct ceph_osd *o = con->private; 2976 struct ceph_osd_client *osdc = o->o_osdc; 2977 struct ceph_auth_client *ac = osdc->client->monc.auth; 2978 2979 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 2980 return ceph_monc_validate_auth(&osdc->client->monc); 2981} 2982 2983static int sign_message(struct ceph_connection *con, struct ceph_msg *msg) 2984{ 2985 struct ceph_osd *o = con->private; 2986 struct ceph_auth_handshake *auth = &o->o_auth; 2987 return ceph_auth_sign_message(auth, msg); 2988} 2989 2990static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg) 2991{ 2992 struct ceph_osd *o = con->private; 2993 struct ceph_auth_handshake *auth = &o->o_auth; 2994 return ceph_auth_check_message_signature(auth, msg); 2995} 2996 2997static const struct ceph_connection_operations osd_con_ops = { 2998 .get = get_osd_con, 2999 .put = put_osd_con, 3000 .dispatch = dispatch, 3001 .get_authorizer = get_authorizer, 3002 .verify_authorizer_reply = verify_authorizer_reply, 3003 .invalidate_authorizer = invalidate_authorizer, 3004 .alloc_msg = alloc_msg, 3005 .sign_message = sign_message, 3006 .check_message_signature = check_message_signature, 3007 .fault = osd_reset, 3008}; 3009