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