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 WARN_ON(!list_empty(&osd->o_requests)); 1011 WARN_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 1258 list_del_init(&req->r_req_lru_item); /* can be on notarget */ 1259 ceph_osdc_put_request(req); 1260 } 1261 1262 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 1263 struct ceph_osd_request *req) 1264 { 1265 if (!req->r_linger) { 1266 dout("set_request_linger %p\n", req); 1267 req->r_linger = 1; 1268 } 1269 } 1270 EXPORT_SYMBOL(ceph_osdc_set_request_linger); 1271 1272 /* 1273 * Returns whether a request should be blocked from being sent 1274 * based on the current osdmap and osd_client settings. 1275 * 1276 * Caller should hold map_sem for read. 1277 */ 1278 static bool __req_should_be_paused(struct ceph_osd_client *osdc, 1279 struct ceph_osd_request *req) 1280 { 1281 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); 1282 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || 1283 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 1284 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) || 1285 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr); 1286 } 1287 1288 /* 1289 * Calculate mapping of a request to a PG. Takes tiering into account. 1290 */ 1291 static int __calc_request_pg(struct ceph_osdmap *osdmap, 1292 struct ceph_osd_request *req, 1293 struct ceph_pg *pg_out) 1294 { 1295 bool need_check_tiering; 1296 1297 need_check_tiering = false; 1298 if (req->r_target_oloc.pool == -1) { 1299 req->r_target_oloc = req->r_base_oloc; /* struct */ 1300 need_check_tiering = true; 1301 } 1302 if (req->r_target_oid.name_len == 0) { 1303 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid); 1304 need_check_tiering = true; 1305 } 1306 1307 if (need_check_tiering && 1308 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1309 struct ceph_pg_pool_info *pi; 1310 1311 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool); 1312 if (pi) { 1313 if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1314 pi->read_tier >= 0) 1315 req->r_target_oloc.pool = pi->read_tier; 1316 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1317 pi->write_tier >= 0) 1318 req->r_target_oloc.pool = pi->write_tier; 1319 } 1320 /* !pi is caught in ceph_oloc_oid_to_pg() */ 1321 } 1322 1323 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc, 1324 &req->r_target_oid, pg_out); 1325 } 1326 1327 static void __enqueue_request(struct ceph_osd_request *req) 1328 { 1329 struct ceph_osd_client *osdc = req->r_osdc; 1330 1331 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid, 1332 req->r_osd ? req->r_osd->o_osd : -1); 1333 1334 if (req->r_osd) { 1335 __remove_osd_from_lru(req->r_osd); 1336 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); 1337 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent); 1338 } else { 1339 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget); 1340 } 1341 } 1342 1343 /* 1344 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct 1345 * (as needed), and set the request r_osd appropriately. If there is 1346 * no up osd, set r_osd to NULL. Move the request to the appropriate list 1347 * (unsent, homeless) or leave on in-flight lru. 1348 * 1349 * Return 0 if unchanged, 1 if changed, or negative on error. 1350 * 1351 * Caller should hold map_sem for read and request_mutex. 1352 */ 1353 static int __map_request(struct ceph_osd_client *osdc, 1354 struct ceph_osd_request *req, int force_resend) 1355 { 1356 struct ceph_pg pgid; 1357 int acting[CEPH_PG_MAX_SIZE]; 1358 int num, o; 1359 int err; 1360 bool was_paused; 1361 1362 dout("map_request %p tid %lld\n", req, req->r_tid); 1363 1364 err = __calc_request_pg(osdc->osdmap, req, &pgid); 1365 if (err) { 1366 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1367 return err; 1368 } 1369 req->r_pgid = pgid; 1370 1371 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o); 1372 if (num < 0) 1373 num = 0; 1374 1375 was_paused = req->r_paused; 1376 req->r_paused = __req_should_be_paused(osdc, req); 1377 if (was_paused && !req->r_paused) 1378 force_resend = 1; 1379 1380 if ((!force_resend && 1381 req->r_osd && req->r_osd->o_osd == o && 1382 req->r_sent >= req->r_osd->o_incarnation && 1383 req->r_num_pg_osds == num && 1384 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || 1385 (req->r_osd == NULL && o == -1) || 1386 req->r_paused) 1387 return 0; /* no change */ 1388 1389 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n", 1390 req->r_tid, pgid.pool, pgid.seed, o, 1391 req->r_osd ? req->r_osd->o_osd : -1); 1392 1393 /* record full pg acting set */ 1394 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); 1395 req->r_num_pg_osds = num; 1396 1397 if (req->r_osd) { 1398 __cancel_request(req); 1399 list_del_init(&req->r_osd_item); 1400 list_del_init(&req->r_linger_osd_item); 1401 req->r_osd = NULL; 1402 } 1403 1404 req->r_osd = __lookup_osd(osdc, o); 1405 if (!req->r_osd && o >= 0) { 1406 err = -ENOMEM; 1407 req->r_osd = create_osd(osdc, o); 1408 if (!req->r_osd) { 1409 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1410 goto out; 1411 } 1412 1413 dout("map_request osd %p is osd%d\n", req->r_osd, o); 1414 __insert_osd(osdc, req->r_osd); 1415 1416 ceph_con_open(&req->r_osd->o_con, 1417 CEPH_ENTITY_TYPE_OSD, o, 1418 &osdc->osdmap->osd_addr[o]); 1419 } 1420 1421 __enqueue_request(req); 1422 err = 1; /* osd or pg changed */ 1423 1424 out: 1425 return err; 1426 } 1427 1428 /* 1429 * caller should hold map_sem (for read) and request_mutex 1430 */ 1431 static void __send_request(struct ceph_osd_client *osdc, 1432 struct ceph_osd_request *req) 1433 { 1434 void *p; 1435 1436 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n", 1437 req, req->r_tid, req->r_osd->o_osd, req->r_flags, 1438 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed); 1439 1440 /* fill in message content that changes each time we send it */ 1441 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch); 1442 put_unaligned_le32(req->r_flags, req->r_request_flags); 1443 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool); 1444 p = req->r_request_pgid; 1445 ceph_encode_64(&p, req->r_pgid.pool); 1446 ceph_encode_32(&p, req->r_pgid.seed); 1447 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */ 1448 memcpy(req->r_request_reassert_version, &req->r_reassert_version, 1449 sizeof(req->r_reassert_version)); 1450 1451 req->r_stamp = jiffies; 1452 list_move_tail(&req->r_req_lru_item, &osdc->req_lru); 1453 1454 ceph_msg_get(req->r_request); /* send consumes a ref */ 1455 1456 req->r_sent = req->r_osd->o_incarnation; 1457 1458 ceph_con_send(&req->r_osd->o_con, req->r_request); 1459 } 1460 1461 /* 1462 * Send any requests in the queue (req_unsent). 1463 */ 1464 static void __send_queued(struct ceph_osd_client *osdc) 1465 { 1466 struct ceph_osd_request *req, *tmp; 1467 1468 dout("__send_queued\n"); 1469 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) 1470 __send_request(osdc, req); 1471 } 1472 1473 /* 1474 * Caller should hold map_sem for read and request_mutex. 1475 */ 1476 static int __ceph_osdc_start_request(struct ceph_osd_client *osdc, 1477 struct ceph_osd_request *req, 1478 bool nofail) 1479 { 1480 int rc; 1481 1482 __register_request(osdc, req); 1483 req->r_sent = 0; 1484 req->r_got_reply = 0; 1485 rc = __map_request(osdc, req, 0); 1486 if (rc < 0) { 1487 if (nofail) { 1488 dout("osdc_start_request failed map, " 1489 " will retry %lld\n", req->r_tid); 1490 rc = 0; 1491 } else { 1492 __unregister_request(osdc, req); 1493 } 1494 return rc; 1495 } 1496 1497 if (req->r_osd == NULL) { 1498 dout("send_request %p no up osds in pg\n", req); 1499 ceph_monc_request_next_osdmap(&osdc->client->monc); 1500 } else { 1501 __send_queued(osdc); 1502 } 1503 1504 return 0; 1505 } 1506 1507 /* 1508 * Timeout callback, called every N seconds when 1 or more osd 1509 * requests has been active for more than N seconds. When this 1510 * happens, we ping all OSDs with requests who have timed out to 1511 * ensure any communications channel reset is detected. Reset the 1512 * request timeouts another N seconds in the future as we go. 1513 * Reschedule the timeout event another N seconds in future (unless 1514 * there are no open requests). 1515 */ 1516 static void handle_timeout(struct work_struct *work) 1517 { 1518 struct ceph_osd_client *osdc = 1519 container_of(work, struct ceph_osd_client, timeout_work.work); 1520 struct ceph_osd_request *req; 1521 struct ceph_osd *osd; 1522 unsigned long keepalive = 1523 osdc->client->options->osd_keepalive_timeout * HZ; 1524 struct list_head slow_osds; 1525 dout("timeout\n"); 1526 down_read(&osdc->map_sem); 1527 1528 ceph_monc_request_next_osdmap(&osdc->client->monc); 1529 1530 mutex_lock(&osdc->request_mutex); 1531 1532 /* 1533 * ping osds that are a bit slow. this ensures that if there 1534 * is a break in the TCP connection we will notice, and reopen 1535 * a connection with that osd (from the fault callback). 1536 */ 1537 INIT_LIST_HEAD(&slow_osds); 1538 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { 1539 if (time_before(jiffies, req->r_stamp + keepalive)) 1540 break; 1541 1542 osd = req->r_osd; 1543 BUG_ON(!osd); 1544 dout(" tid %llu is slow, will send keepalive on osd%d\n", 1545 req->r_tid, osd->o_osd); 1546 list_move_tail(&osd->o_keepalive_item, &slow_osds); 1547 } 1548 while (!list_empty(&slow_osds)) { 1549 osd = list_entry(slow_osds.next, struct ceph_osd, 1550 o_keepalive_item); 1551 list_del_init(&osd->o_keepalive_item); 1552 ceph_con_keepalive(&osd->o_con); 1553 } 1554 1555 __schedule_osd_timeout(osdc); 1556 __send_queued(osdc); 1557 mutex_unlock(&osdc->request_mutex); 1558 up_read(&osdc->map_sem); 1559 } 1560 1561 static void handle_osds_timeout(struct work_struct *work) 1562 { 1563 struct ceph_osd_client *osdc = 1564 container_of(work, struct ceph_osd_client, 1565 osds_timeout_work.work); 1566 unsigned long delay = 1567 osdc->client->options->osd_idle_ttl * HZ >> 2; 1568 1569 dout("osds timeout\n"); 1570 down_read(&osdc->map_sem); 1571 remove_old_osds(osdc); 1572 up_read(&osdc->map_sem); 1573 1574 schedule_delayed_work(&osdc->osds_timeout_work, 1575 round_jiffies_relative(delay)); 1576 } 1577 1578 static int ceph_oloc_decode(void **p, void *end, 1579 struct ceph_object_locator *oloc) 1580 { 1581 u8 struct_v, struct_cv; 1582 u32 len; 1583 void *struct_end; 1584 int ret = 0; 1585 1586 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1587 struct_v = ceph_decode_8(p); 1588 struct_cv = ceph_decode_8(p); 1589 if (struct_v < 3) { 1590 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 1591 struct_v, struct_cv); 1592 goto e_inval; 1593 } 1594 if (struct_cv > 6) { 1595 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 1596 struct_v, struct_cv); 1597 goto e_inval; 1598 } 1599 len = ceph_decode_32(p); 1600 ceph_decode_need(p, end, len, e_inval); 1601 struct_end = *p + len; 1602 1603 oloc->pool = ceph_decode_64(p); 1604 *p += 4; /* skip preferred */ 1605 1606 len = ceph_decode_32(p); 1607 if (len > 0) { 1608 pr_warn("ceph_object_locator::key is set\n"); 1609 goto e_inval; 1610 } 1611 1612 if (struct_v >= 5) { 1613 len = ceph_decode_32(p); 1614 if (len > 0) { 1615 pr_warn("ceph_object_locator::nspace is set\n"); 1616 goto e_inval; 1617 } 1618 } 1619 1620 if (struct_v >= 6) { 1621 s64 hash = ceph_decode_64(p); 1622 if (hash != -1) { 1623 pr_warn("ceph_object_locator::hash is set\n"); 1624 goto e_inval; 1625 } 1626 } 1627 1628 /* skip the rest */ 1629 *p = struct_end; 1630 out: 1631 return ret; 1632 1633 e_inval: 1634 ret = -EINVAL; 1635 goto out; 1636 } 1637 1638 static int ceph_redirect_decode(void **p, void *end, 1639 struct ceph_request_redirect *redir) 1640 { 1641 u8 struct_v, struct_cv; 1642 u32 len; 1643 void *struct_end; 1644 int ret; 1645 1646 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1647 struct_v = ceph_decode_8(p); 1648 struct_cv = ceph_decode_8(p); 1649 if (struct_cv > 1) { 1650 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 1651 struct_v, struct_cv); 1652 goto e_inval; 1653 } 1654 len = ceph_decode_32(p); 1655 ceph_decode_need(p, end, len, e_inval); 1656 struct_end = *p + len; 1657 1658 ret = ceph_oloc_decode(p, end, &redir->oloc); 1659 if (ret) 1660 goto out; 1661 1662 len = ceph_decode_32(p); 1663 if (len > 0) { 1664 pr_warn("ceph_request_redirect::object_name is set\n"); 1665 goto e_inval; 1666 } 1667 1668 len = ceph_decode_32(p); 1669 *p += len; /* skip osd_instructions */ 1670 1671 /* skip the rest */ 1672 *p = struct_end; 1673 out: 1674 return ret; 1675 1676 e_inval: 1677 ret = -EINVAL; 1678 goto out; 1679 } 1680 1681 static void complete_request(struct ceph_osd_request *req) 1682 { 1683 complete_all(&req->r_safe_completion); /* fsync waiter */ 1684 } 1685 1686 /* 1687 * handle osd op reply. either call the callback if it is specified, 1688 * or do the completion to wake up the waiting thread. 1689 */ 1690 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, 1691 struct ceph_connection *con) 1692 { 1693 void *p, *end; 1694 struct ceph_osd_request *req; 1695 struct ceph_request_redirect redir; 1696 u64 tid; 1697 int object_len; 1698 unsigned int numops; 1699 int payload_len, flags; 1700 s32 result; 1701 s32 retry_attempt; 1702 struct ceph_pg pg; 1703 int err; 1704 u32 reassert_epoch; 1705 u64 reassert_version; 1706 u32 osdmap_epoch; 1707 int already_completed; 1708 u32 bytes; 1709 unsigned int i; 1710 1711 tid = le64_to_cpu(msg->hdr.tid); 1712 dout("handle_reply %p tid %llu\n", msg, tid); 1713 1714 p = msg->front.iov_base; 1715 end = p + msg->front.iov_len; 1716 1717 ceph_decode_need(&p, end, 4, bad); 1718 object_len = ceph_decode_32(&p); 1719 ceph_decode_need(&p, end, object_len, bad); 1720 p += object_len; 1721 1722 err = ceph_decode_pgid(&p, end, &pg); 1723 if (err) 1724 goto bad; 1725 1726 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad); 1727 flags = ceph_decode_64(&p); 1728 result = ceph_decode_32(&p); 1729 reassert_epoch = ceph_decode_32(&p); 1730 reassert_version = ceph_decode_64(&p); 1731 osdmap_epoch = ceph_decode_32(&p); 1732 1733 /* lookup */ 1734 down_read(&osdc->map_sem); 1735 mutex_lock(&osdc->request_mutex); 1736 req = __lookup_request(osdc, tid); 1737 if (req == NULL) { 1738 dout("handle_reply tid %llu dne\n", tid); 1739 goto bad_mutex; 1740 } 1741 ceph_osdc_get_request(req); 1742 1743 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid, 1744 req, result); 1745 1746 ceph_decode_need(&p, end, 4, bad_put); 1747 numops = ceph_decode_32(&p); 1748 if (numops > CEPH_OSD_MAX_OP) 1749 goto bad_put; 1750 if (numops != req->r_num_ops) 1751 goto bad_put; 1752 payload_len = 0; 1753 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put); 1754 for (i = 0; i < numops; i++) { 1755 struct ceph_osd_op *op = p; 1756 int len; 1757 1758 len = le32_to_cpu(op->payload_len); 1759 req->r_reply_op_len[i] = len; 1760 dout(" op %d has %d bytes\n", i, len); 1761 payload_len += len; 1762 p += sizeof(*op); 1763 } 1764 bytes = le32_to_cpu(msg->hdr.data_len); 1765 if (payload_len != bytes) { 1766 pr_warn("sum of op payload lens %d != data_len %d\n", 1767 payload_len, bytes); 1768 goto bad_put; 1769 } 1770 1771 ceph_decode_need(&p, end, 4 + numops * 4, bad_put); 1772 retry_attempt = ceph_decode_32(&p); 1773 for (i = 0; i < numops; i++) 1774 req->r_reply_op_result[i] = ceph_decode_32(&p); 1775 1776 if (le16_to_cpu(msg->hdr.version) >= 6) { 1777 p += 8 + 4; /* skip replay_version */ 1778 p += 8; /* skip user_version */ 1779 1780 err = ceph_redirect_decode(&p, end, &redir); 1781 if (err) 1782 goto bad_put; 1783 } else { 1784 redir.oloc.pool = -1; 1785 } 1786 1787 if (redir.oloc.pool != -1) { 1788 dout("redirect pool %lld\n", redir.oloc.pool); 1789 1790 __unregister_request(osdc, req); 1791 1792 req->r_target_oloc = redir.oloc; /* struct */ 1793 1794 /* 1795 * Start redirect requests with nofail=true. If 1796 * mapping fails, request will end up on the notarget 1797 * list, waiting for the new osdmap (which can take 1798 * a while), even though the original request mapped 1799 * successfully. In the future we might want to follow 1800 * original request's nofail setting here. 1801 */ 1802 err = __ceph_osdc_start_request(osdc, req, true); 1803 BUG_ON(err); 1804 1805 goto out_unlock; 1806 } 1807 1808 already_completed = req->r_got_reply; 1809 if (!req->r_got_reply) { 1810 req->r_result = result; 1811 dout("handle_reply result %d bytes %d\n", req->r_result, 1812 bytes); 1813 if (req->r_result == 0) 1814 req->r_result = bytes; 1815 1816 /* in case this is a write and we need to replay, */ 1817 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch); 1818 req->r_reassert_version.version = cpu_to_le64(reassert_version); 1819 1820 req->r_got_reply = 1; 1821 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { 1822 dout("handle_reply tid %llu dup ack\n", tid); 1823 goto out_unlock; 1824 } 1825 1826 dout("handle_reply tid %llu flags %d\n", tid, flags); 1827 1828 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) 1829 __register_linger_request(osdc, req); 1830 1831 /* either this is a read, or we got the safe response */ 1832 if (result < 0 || 1833 (flags & CEPH_OSD_FLAG_ONDISK) || 1834 ((flags & CEPH_OSD_FLAG_WRITE) == 0)) 1835 __unregister_request(osdc, req); 1836 1837 mutex_unlock(&osdc->request_mutex); 1838 up_read(&osdc->map_sem); 1839 1840 if (!already_completed) { 1841 if (req->r_unsafe_callback && 1842 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK)) 1843 req->r_unsafe_callback(req, true); 1844 if (req->r_callback) 1845 req->r_callback(req, msg); 1846 else 1847 complete_all(&req->r_completion); 1848 } 1849 1850 if (flags & CEPH_OSD_FLAG_ONDISK) { 1851 if (req->r_unsafe_callback && already_completed) 1852 req->r_unsafe_callback(req, false); 1853 complete_request(req); 1854 } 1855 1856 out: 1857 dout("req=%p req->r_linger=%d\n", req, req->r_linger); 1858 ceph_osdc_put_request(req); 1859 return; 1860 out_unlock: 1861 mutex_unlock(&osdc->request_mutex); 1862 up_read(&osdc->map_sem); 1863 goto out; 1864 1865 bad_put: 1866 req->r_result = -EIO; 1867 __unregister_request(osdc, req); 1868 if (req->r_callback) 1869 req->r_callback(req, msg); 1870 else 1871 complete_all(&req->r_completion); 1872 complete_request(req); 1873 ceph_osdc_put_request(req); 1874 bad_mutex: 1875 mutex_unlock(&osdc->request_mutex); 1876 up_read(&osdc->map_sem); 1877 bad: 1878 pr_err("corrupt osd_op_reply got %d %d\n", 1879 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len)); 1880 ceph_msg_dump(msg); 1881 } 1882 1883 static void reset_changed_osds(struct ceph_osd_client *osdc) 1884 { 1885 struct rb_node *p, *n; 1886 1887 for (p = rb_first(&osdc->osds); p; p = n) { 1888 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); 1889 1890 n = rb_next(p); 1891 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 1892 memcmp(&osd->o_con.peer_addr, 1893 ceph_osd_addr(osdc->osdmap, 1894 osd->o_osd), 1895 sizeof(struct ceph_entity_addr)) != 0) 1896 __reset_osd(osdc, osd); 1897 } 1898 } 1899 1900 /* 1901 * Requeue requests whose mapping to an OSD has changed. If requests map to 1902 * no osd, request a new map. 1903 * 1904 * Caller should hold map_sem for read. 1905 */ 1906 static void kick_requests(struct ceph_osd_client *osdc, bool force_resend, 1907 bool force_resend_writes) 1908 { 1909 struct ceph_osd_request *req, *nreq; 1910 struct rb_node *p; 1911 int needmap = 0; 1912 int err; 1913 bool force_resend_req; 1914 1915 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "", 1916 force_resend_writes ? " (force resend writes)" : ""); 1917 mutex_lock(&osdc->request_mutex); 1918 for (p = rb_first(&osdc->requests); p; ) { 1919 req = rb_entry(p, struct ceph_osd_request, r_node); 1920 p = rb_next(p); 1921 1922 /* 1923 * For linger requests that have not yet been 1924 * registered, move them to the linger list; they'll 1925 * be sent to the osd in the loop below. Unregister 1926 * the request before re-registering it as a linger 1927 * request to ensure the __map_request() below 1928 * will decide it needs to be sent. 1929 */ 1930 if (req->r_linger && list_empty(&req->r_linger_item)) { 1931 dout("%p tid %llu restart on osd%d\n", 1932 req, req->r_tid, 1933 req->r_osd ? req->r_osd->o_osd : -1); 1934 ceph_osdc_get_request(req); 1935 __unregister_request(osdc, req); 1936 __register_linger_request(osdc, req); 1937 ceph_osdc_put_request(req); 1938 continue; 1939 } 1940 1941 force_resend_req = force_resend || 1942 (force_resend_writes && 1943 req->r_flags & CEPH_OSD_FLAG_WRITE); 1944 err = __map_request(osdc, req, force_resend_req); 1945 if (err < 0) 1946 continue; /* error */ 1947 if (req->r_osd == NULL) { 1948 dout("%p tid %llu maps to no osd\n", req, req->r_tid); 1949 needmap++; /* request a newer map */ 1950 } else if (err > 0) { 1951 if (!req->r_linger) { 1952 dout("%p tid %llu requeued on osd%d\n", req, 1953 req->r_tid, 1954 req->r_osd ? req->r_osd->o_osd : -1); 1955 req->r_flags |= CEPH_OSD_FLAG_RETRY; 1956 } 1957 } 1958 } 1959 1960 list_for_each_entry_safe(req, nreq, &osdc->req_linger, 1961 r_linger_item) { 1962 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); 1963 1964 err = __map_request(osdc, req, 1965 force_resend || force_resend_writes); 1966 dout("__map_request returned %d\n", err); 1967 if (err == 0) 1968 continue; /* no change and no osd was specified */ 1969 if (err < 0) 1970 continue; /* hrm! */ 1971 if (req->r_osd == NULL) { 1972 dout("tid %llu maps to no valid osd\n", req->r_tid); 1973 needmap++; /* request a newer map */ 1974 continue; 1975 } 1976 1977 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid, 1978 req->r_osd ? req->r_osd->o_osd : -1); 1979 __register_request(osdc, req); 1980 __unregister_linger_request(osdc, req); 1981 } 1982 reset_changed_osds(osdc); 1983 mutex_unlock(&osdc->request_mutex); 1984 1985 if (needmap) { 1986 dout("%d requests for down osds, need new map\n", needmap); 1987 ceph_monc_request_next_osdmap(&osdc->client->monc); 1988 } 1989 } 1990 1991 1992 /* 1993 * Process updated osd map. 1994 * 1995 * The message contains any number of incremental and full maps, normally 1996 * indicating some sort of topology change in the cluster. Kick requests 1997 * off to different OSDs as needed. 1998 */ 1999 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 2000 { 2001 void *p, *end, *next; 2002 u32 nr_maps, maplen; 2003 u32 epoch; 2004 struct ceph_osdmap *newmap = NULL, *oldmap; 2005 int err; 2006 struct ceph_fsid fsid; 2007 bool was_full; 2008 2009 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); 2010 p = msg->front.iov_base; 2011 end = p + msg->front.iov_len; 2012 2013 /* verify fsid */ 2014 ceph_decode_need(&p, end, sizeof(fsid), bad); 2015 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 2016 if (ceph_check_fsid(osdc->client, &fsid) < 0) 2017 return; 2018 2019 down_write(&osdc->map_sem); 2020 2021 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 2022 2023 /* incremental maps */ 2024 ceph_decode_32_safe(&p, end, nr_maps, bad); 2025 dout(" %d inc maps\n", nr_maps); 2026 while (nr_maps > 0) { 2027 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2028 epoch = ceph_decode_32(&p); 2029 maplen = ceph_decode_32(&p); 2030 ceph_decode_need(&p, end, maplen, bad); 2031 next = p + maplen; 2032 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { 2033 dout("applying incremental map %u len %d\n", 2034 epoch, maplen); 2035 newmap = osdmap_apply_incremental(&p, next, 2036 osdc->osdmap, 2037 &osdc->client->msgr); 2038 if (IS_ERR(newmap)) { 2039 err = PTR_ERR(newmap); 2040 goto bad; 2041 } 2042 BUG_ON(!newmap); 2043 if (newmap != osdc->osdmap) { 2044 ceph_osdmap_destroy(osdc->osdmap); 2045 osdc->osdmap = newmap; 2046 } 2047 was_full = was_full || 2048 ceph_osdmap_flag(osdc->osdmap, 2049 CEPH_OSDMAP_FULL); 2050 kick_requests(osdc, 0, was_full); 2051 } else { 2052 dout("ignoring incremental map %u len %d\n", 2053 epoch, maplen); 2054 } 2055 p = next; 2056 nr_maps--; 2057 } 2058 if (newmap) 2059 goto done; 2060 2061 /* full maps */ 2062 ceph_decode_32_safe(&p, end, nr_maps, bad); 2063 dout(" %d full maps\n", nr_maps); 2064 while (nr_maps) { 2065 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2066 epoch = ceph_decode_32(&p); 2067 maplen = ceph_decode_32(&p); 2068 ceph_decode_need(&p, end, maplen, bad); 2069 if (nr_maps > 1) { 2070 dout("skipping non-latest full map %u len %d\n", 2071 epoch, maplen); 2072 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { 2073 dout("skipping full map %u len %d, " 2074 "older than our %u\n", epoch, maplen, 2075 osdc->osdmap->epoch); 2076 } else { 2077 int skipped_map = 0; 2078 2079 dout("taking full map %u len %d\n", epoch, maplen); 2080 newmap = ceph_osdmap_decode(&p, p+maplen); 2081 if (IS_ERR(newmap)) { 2082 err = PTR_ERR(newmap); 2083 goto bad; 2084 } 2085 BUG_ON(!newmap); 2086 oldmap = osdc->osdmap; 2087 osdc->osdmap = newmap; 2088 if (oldmap) { 2089 if (oldmap->epoch + 1 < newmap->epoch) 2090 skipped_map = 1; 2091 ceph_osdmap_destroy(oldmap); 2092 } 2093 was_full = was_full || 2094 ceph_osdmap_flag(osdc->osdmap, 2095 CEPH_OSDMAP_FULL); 2096 kick_requests(osdc, skipped_map, was_full); 2097 } 2098 p += maplen; 2099 nr_maps--; 2100 } 2101 2102 if (!osdc->osdmap) 2103 goto bad; 2104 done: 2105 downgrade_write(&osdc->map_sem); 2106 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); 2107 2108 /* 2109 * subscribe to subsequent osdmap updates if full to ensure 2110 * we find out when we are no longer full and stop returning 2111 * ENOSPC. 2112 */ 2113 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 2114 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) || 2115 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) 2116 ceph_monc_request_next_osdmap(&osdc->client->monc); 2117 2118 mutex_lock(&osdc->request_mutex); 2119 __send_queued(osdc); 2120 mutex_unlock(&osdc->request_mutex); 2121 up_read(&osdc->map_sem); 2122 wake_up_all(&osdc->client->auth_wq); 2123 return; 2124 2125 bad: 2126 pr_err("osdc handle_map corrupt msg\n"); 2127 ceph_msg_dump(msg); 2128 up_write(&osdc->map_sem); 2129 } 2130 2131 /* 2132 * watch/notify callback event infrastructure 2133 * 2134 * These callbacks are used both for watch and notify operations. 2135 */ 2136 static void __release_event(struct kref *kref) 2137 { 2138 struct ceph_osd_event *event = 2139 container_of(kref, struct ceph_osd_event, kref); 2140 2141 dout("__release_event %p\n", event); 2142 kfree(event); 2143 } 2144 2145 static void get_event(struct ceph_osd_event *event) 2146 { 2147 kref_get(&event->kref); 2148 } 2149 2150 void ceph_osdc_put_event(struct ceph_osd_event *event) 2151 { 2152 kref_put(&event->kref, __release_event); 2153 } 2154 EXPORT_SYMBOL(ceph_osdc_put_event); 2155 2156 static void __insert_event(struct ceph_osd_client *osdc, 2157 struct ceph_osd_event *new) 2158 { 2159 struct rb_node **p = &osdc->event_tree.rb_node; 2160 struct rb_node *parent = NULL; 2161 struct ceph_osd_event *event = NULL; 2162 2163 while (*p) { 2164 parent = *p; 2165 event = rb_entry(parent, struct ceph_osd_event, node); 2166 if (new->cookie < event->cookie) 2167 p = &(*p)->rb_left; 2168 else if (new->cookie > event->cookie) 2169 p = &(*p)->rb_right; 2170 else 2171 BUG(); 2172 } 2173 2174 rb_link_node(&new->node, parent, p); 2175 rb_insert_color(&new->node, &osdc->event_tree); 2176 } 2177 2178 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, 2179 u64 cookie) 2180 { 2181 struct rb_node **p = &osdc->event_tree.rb_node; 2182 struct rb_node *parent = NULL; 2183 struct ceph_osd_event *event = NULL; 2184 2185 while (*p) { 2186 parent = *p; 2187 event = rb_entry(parent, struct ceph_osd_event, node); 2188 if (cookie < event->cookie) 2189 p = &(*p)->rb_left; 2190 else if (cookie > event->cookie) 2191 p = &(*p)->rb_right; 2192 else 2193 return event; 2194 } 2195 return NULL; 2196 } 2197 2198 static void __remove_event(struct ceph_osd_event *event) 2199 { 2200 struct ceph_osd_client *osdc = event->osdc; 2201 2202 if (!RB_EMPTY_NODE(&event->node)) { 2203 dout("__remove_event removed %p\n", event); 2204 rb_erase(&event->node, &osdc->event_tree); 2205 ceph_osdc_put_event(event); 2206 } else { 2207 dout("__remove_event didn't remove %p\n", event); 2208 } 2209 } 2210 2211 int ceph_osdc_create_event(struct ceph_osd_client *osdc, 2212 void (*event_cb)(u64, u64, u8, void *), 2213 void *data, struct ceph_osd_event **pevent) 2214 { 2215 struct ceph_osd_event *event; 2216 2217 event = kmalloc(sizeof(*event), GFP_NOIO); 2218 if (!event) 2219 return -ENOMEM; 2220 2221 dout("create_event %p\n", event); 2222 event->cb = event_cb; 2223 event->one_shot = 0; 2224 event->data = data; 2225 event->osdc = osdc; 2226 INIT_LIST_HEAD(&event->osd_node); 2227 RB_CLEAR_NODE(&event->node); 2228 kref_init(&event->kref); /* one ref for us */ 2229 kref_get(&event->kref); /* one ref for the caller */ 2230 2231 spin_lock(&osdc->event_lock); 2232 event->cookie = ++osdc->event_count; 2233 __insert_event(osdc, event); 2234 spin_unlock(&osdc->event_lock); 2235 2236 *pevent = event; 2237 return 0; 2238 } 2239 EXPORT_SYMBOL(ceph_osdc_create_event); 2240 2241 void ceph_osdc_cancel_event(struct ceph_osd_event *event) 2242 { 2243 struct ceph_osd_client *osdc = event->osdc; 2244 2245 dout("cancel_event %p\n", event); 2246 spin_lock(&osdc->event_lock); 2247 __remove_event(event); 2248 spin_unlock(&osdc->event_lock); 2249 ceph_osdc_put_event(event); /* caller's */ 2250 } 2251 EXPORT_SYMBOL(ceph_osdc_cancel_event); 2252 2253 2254 static void do_event_work(struct work_struct *work) 2255 { 2256 struct ceph_osd_event_work *event_work = 2257 container_of(work, struct ceph_osd_event_work, work); 2258 struct ceph_osd_event *event = event_work->event; 2259 u64 ver = event_work->ver; 2260 u64 notify_id = event_work->notify_id; 2261 u8 opcode = event_work->opcode; 2262 2263 dout("do_event_work completing %p\n", event); 2264 event->cb(ver, notify_id, opcode, event->data); 2265 dout("do_event_work completed %p\n", event); 2266 ceph_osdc_put_event(event); 2267 kfree(event_work); 2268 } 2269 2270 2271 /* 2272 * Process osd watch notifications 2273 */ 2274 static void handle_watch_notify(struct ceph_osd_client *osdc, 2275 struct ceph_msg *msg) 2276 { 2277 void *p, *end; 2278 u8 proto_ver; 2279 u64 cookie, ver, notify_id; 2280 u8 opcode; 2281 struct ceph_osd_event *event; 2282 struct ceph_osd_event_work *event_work; 2283 2284 p = msg->front.iov_base; 2285 end = p + msg->front.iov_len; 2286 2287 ceph_decode_8_safe(&p, end, proto_ver, bad); 2288 ceph_decode_8_safe(&p, end, opcode, bad); 2289 ceph_decode_64_safe(&p, end, cookie, bad); 2290 ceph_decode_64_safe(&p, end, ver, bad); 2291 ceph_decode_64_safe(&p, end, notify_id, bad); 2292 2293 spin_lock(&osdc->event_lock); 2294 event = __find_event(osdc, cookie); 2295 if (event) { 2296 BUG_ON(event->one_shot); 2297 get_event(event); 2298 } 2299 spin_unlock(&osdc->event_lock); 2300 dout("handle_watch_notify cookie %lld ver %lld event %p\n", 2301 cookie, ver, event); 2302 if (event) { 2303 event_work = kmalloc(sizeof(*event_work), GFP_NOIO); 2304 if (!event_work) { 2305 pr_err("couldn't allocate event_work\n"); 2306 ceph_osdc_put_event(event); 2307 return; 2308 } 2309 INIT_WORK(&event_work->work, do_event_work); 2310 event_work->event = event; 2311 event_work->ver = ver; 2312 event_work->notify_id = notify_id; 2313 event_work->opcode = opcode; 2314 2315 queue_work(osdc->notify_wq, &event_work->work); 2316 } 2317 2318 return; 2319 2320 bad: 2321 pr_err("osdc handle_watch_notify corrupt msg\n"); 2322 } 2323 2324 /* 2325 * build new request AND message 2326 * 2327 */ 2328 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 2329 struct ceph_snap_context *snapc, u64 snap_id, 2330 struct timespec *mtime) 2331 { 2332 struct ceph_msg *msg = req->r_request; 2333 void *p; 2334 size_t msg_size; 2335 int flags = req->r_flags; 2336 u64 data_len; 2337 unsigned int i; 2338 2339 req->r_snapid = snap_id; 2340 req->r_snapc = ceph_get_snap_context(snapc); 2341 2342 /* encode request */ 2343 msg->hdr.version = cpu_to_le16(4); 2344 2345 p = msg->front.iov_base; 2346 ceph_encode_32(&p, 1); /* client_inc is always 1 */ 2347 req->r_request_osdmap_epoch = p; 2348 p += 4; 2349 req->r_request_flags = p; 2350 p += 4; 2351 if (req->r_flags & CEPH_OSD_FLAG_WRITE) 2352 ceph_encode_timespec(p, mtime); 2353 p += sizeof(struct ceph_timespec); 2354 req->r_request_reassert_version = p; 2355 p += sizeof(struct ceph_eversion); /* will get filled in */ 2356 2357 /* oloc */ 2358 ceph_encode_8(&p, 4); 2359 ceph_encode_8(&p, 4); 2360 ceph_encode_32(&p, 8 + 4 + 4); 2361 req->r_request_pool = p; 2362 p += 8; 2363 ceph_encode_32(&p, -1); /* preferred */ 2364 ceph_encode_32(&p, 0); /* key len */ 2365 2366 ceph_encode_8(&p, 1); 2367 req->r_request_pgid = p; 2368 p += 8 + 4; 2369 ceph_encode_32(&p, -1); /* preferred */ 2370 2371 /* oid */ 2372 ceph_encode_32(&p, req->r_base_oid.name_len); 2373 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len); 2374 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len, 2375 req->r_base_oid.name, req->r_base_oid.name_len); 2376 p += req->r_base_oid.name_len; 2377 2378 /* ops--can imply data */ 2379 ceph_encode_16(&p, (u16)req->r_num_ops); 2380 data_len = 0; 2381 for (i = 0; i < req->r_num_ops; i++) { 2382 data_len += osd_req_encode_op(req, p, i); 2383 p += sizeof(struct ceph_osd_op); 2384 } 2385 2386 /* snaps */ 2387 ceph_encode_64(&p, req->r_snapid); 2388 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0); 2389 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0); 2390 if (req->r_snapc) { 2391 for (i = 0; i < snapc->num_snaps; i++) { 2392 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2393 } 2394 } 2395 2396 req->r_request_attempts = p; 2397 p += 4; 2398 2399 /* data */ 2400 if (flags & CEPH_OSD_FLAG_WRITE) { 2401 u16 data_off; 2402 2403 /* 2404 * The header "data_off" is a hint to the receiver 2405 * allowing it to align received data into its 2406 * buffers such that there's no need to re-copy 2407 * it before writing it to disk (direct I/O). 2408 */ 2409 data_off = (u16) (off & 0xffff); 2410 req->r_request->hdr.data_off = cpu_to_le16(data_off); 2411 } 2412 req->r_request->hdr.data_len = cpu_to_le32(data_len); 2413 2414 BUG_ON(p > msg->front.iov_base + msg->front.iov_len); 2415 msg_size = p - msg->front.iov_base; 2416 msg->front.iov_len = msg_size; 2417 msg->hdr.front_len = cpu_to_le32(msg_size); 2418 2419 dout("build_request msg_size was %d\n", (int)msg_size); 2420 } 2421 EXPORT_SYMBOL(ceph_osdc_build_request); 2422 2423 /* 2424 * Register request, send initial attempt. 2425 */ 2426 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 2427 struct ceph_osd_request *req, 2428 bool nofail) 2429 { 2430 int rc; 2431 2432 down_read(&osdc->map_sem); 2433 mutex_lock(&osdc->request_mutex); 2434 2435 rc = __ceph_osdc_start_request(osdc, req, nofail); 2436 2437 mutex_unlock(&osdc->request_mutex); 2438 up_read(&osdc->map_sem); 2439 2440 return rc; 2441 } 2442 EXPORT_SYMBOL(ceph_osdc_start_request); 2443 2444 /* 2445 * Unregister a registered request. The request is not completed (i.e. 2446 * no callbacks or wakeups) - higher layers are supposed to know what 2447 * they are canceling. 2448 */ 2449 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 2450 { 2451 struct ceph_osd_client *osdc = req->r_osdc; 2452 2453 mutex_lock(&osdc->request_mutex); 2454 if (req->r_linger) 2455 __unregister_linger_request(osdc, req); 2456 __unregister_request(osdc, req); 2457 mutex_unlock(&osdc->request_mutex); 2458 2459 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid); 2460 } 2461 EXPORT_SYMBOL(ceph_osdc_cancel_request); 2462 2463 /* 2464 * wait for a request to complete 2465 */ 2466 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 2467 struct ceph_osd_request *req) 2468 { 2469 int rc; 2470 2471 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 2472 2473 rc = wait_for_completion_interruptible(&req->r_completion); 2474 if (rc < 0) { 2475 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid); 2476 ceph_osdc_cancel_request(req); 2477 complete_request(req); 2478 return rc; 2479 } 2480 2481 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid, 2482 req->r_result); 2483 return req->r_result; 2484 } 2485 EXPORT_SYMBOL(ceph_osdc_wait_request); 2486 2487 /* 2488 * sync - wait for all in-flight requests to flush. avoid starvation. 2489 */ 2490 void ceph_osdc_sync(struct ceph_osd_client *osdc) 2491 { 2492 struct ceph_osd_request *req; 2493 u64 last_tid, next_tid = 0; 2494 2495 mutex_lock(&osdc->request_mutex); 2496 last_tid = osdc->last_tid; 2497 while (1) { 2498 req = __lookup_request_ge(osdc, next_tid); 2499 if (!req) 2500 break; 2501 if (req->r_tid > last_tid) 2502 break; 2503 2504 next_tid = req->r_tid + 1; 2505 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) 2506 continue; 2507 2508 ceph_osdc_get_request(req); 2509 mutex_unlock(&osdc->request_mutex); 2510 dout("sync waiting on tid %llu (last is %llu)\n", 2511 req->r_tid, last_tid); 2512 wait_for_completion(&req->r_safe_completion); 2513 mutex_lock(&osdc->request_mutex); 2514 ceph_osdc_put_request(req); 2515 } 2516 mutex_unlock(&osdc->request_mutex); 2517 dout("sync done (thru tid %llu)\n", last_tid); 2518 } 2519 EXPORT_SYMBOL(ceph_osdc_sync); 2520 2521 /* 2522 * Call all pending notify callbacks - for use after a watch is 2523 * unregistered, to make sure no more callbacks for it will be invoked 2524 */ 2525 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 2526 { 2527 flush_workqueue(osdc->notify_wq); 2528 } 2529 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 2530 2531 2532 /* 2533 * init, shutdown 2534 */ 2535 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 2536 { 2537 int err; 2538 2539 dout("init\n"); 2540 osdc->client = client; 2541 osdc->osdmap = NULL; 2542 init_rwsem(&osdc->map_sem); 2543 init_completion(&osdc->map_waiters); 2544 osdc->last_requested_map = 0; 2545 mutex_init(&osdc->request_mutex); 2546 osdc->last_tid = 0; 2547 osdc->osds = RB_ROOT; 2548 INIT_LIST_HEAD(&osdc->osd_lru); 2549 osdc->requests = RB_ROOT; 2550 INIT_LIST_HEAD(&osdc->req_lru); 2551 INIT_LIST_HEAD(&osdc->req_unsent); 2552 INIT_LIST_HEAD(&osdc->req_notarget); 2553 INIT_LIST_HEAD(&osdc->req_linger); 2554 osdc->num_requests = 0; 2555 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 2556 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 2557 spin_lock_init(&osdc->event_lock); 2558 osdc->event_tree = RB_ROOT; 2559 osdc->event_count = 0; 2560 2561 schedule_delayed_work(&osdc->osds_timeout_work, 2562 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); 2563 2564 err = -ENOMEM; 2565 osdc->req_mempool = mempool_create_kmalloc_pool(10, 2566 sizeof(struct ceph_osd_request)); 2567 if (!osdc->req_mempool) 2568 goto out; 2569 2570 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 2571 OSD_OP_FRONT_LEN, 10, true, 2572 "osd_op"); 2573 if (err < 0) 2574 goto out_mempool; 2575 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 2576 OSD_OPREPLY_FRONT_LEN, 10, true, 2577 "osd_op_reply"); 2578 if (err < 0) 2579 goto out_msgpool; 2580 2581 err = -ENOMEM; 2582 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 2583 if (!osdc->notify_wq) 2584 goto out_msgpool_reply; 2585 2586 return 0; 2587 2588 out_msgpool_reply: 2589 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2590 out_msgpool: 2591 ceph_msgpool_destroy(&osdc->msgpool_op); 2592 out_mempool: 2593 mempool_destroy(osdc->req_mempool); 2594 out: 2595 return err; 2596 } 2597 2598 void ceph_osdc_stop(struct ceph_osd_client *osdc) 2599 { 2600 flush_workqueue(osdc->notify_wq); 2601 destroy_workqueue(osdc->notify_wq); 2602 cancel_delayed_work_sync(&osdc->timeout_work); 2603 cancel_delayed_work_sync(&osdc->osds_timeout_work); 2604 if (osdc->osdmap) { 2605 ceph_osdmap_destroy(osdc->osdmap); 2606 osdc->osdmap = NULL; 2607 } 2608 remove_all_osds(osdc); 2609 mempool_destroy(osdc->req_mempool); 2610 ceph_msgpool_destroy(&osdc->msgpool_op); 2611 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2612 } 2613 2614 /* 2615 * Read some contiguous pages. If we cross a stripe boundary, shorten 2616 * *plen. Return number of bytes read, or error. 2617 */ 2618 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 2619 struct ceph_vino vino, struct ceph_file_layout *layout, 2620 u64 off, u64 *plen, 2621 u32 truncate_seq, u64 truncate_size, 2622 struct page **pages, int num_pages, int page_align) 2623 { 2624 struct ceph_osd_request *req; 2625 int rc = 0; 2626 2627 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 2628 vino.snap, off, *plen); 2629 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1, 2630 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 2631 NULL, truncate_seq, truncate_size, 2632 false); 2633 if (IS_ERR(req)) 2634 return PTR_ERR(req); 2635 2636 /* it may be a short read due to an object boundary */ 2637 2638 osd_req_op_extent_osd_data_pages(req, 0, 2639 pages, *plen, page_align, false, false); 2640 2641 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 2642 off, *plen, *plen, page_align); 2643 2644 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL); 2645 2646 rc = ceph_osdc_start_request(osdc, req, false); 2647 if (!rc) 2648 rc = ceph_osdc_wait_request(osdc, req); 2649 2650 ceph_osdc_put_request(req); 2651 dout("readpages result %d\n", rc); 2652 return rc; 2653 } 2654 EXPORT_SYMBOL(ceph_osdc_readpages); 2655 2656 /* 2657 * do a synchronous write on N pages 2658 */ 2659 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 2660 struct ceph_file_layout *layout, 2661 struct ceph_snap_context *snapc, 2662 u64 off, u64 len, 2663 u32 truncate_seq, u64 truncate_size, 2664 struct timespec *mtime, 2665 struct page **pages, int num_pages) 2666 { 2667 struct ceph_osd_request *req; 2668 int rc = 0; 2669 int page_align = off & ~PAGE_MASK; 2670 2671 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */ 2672 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1, 2673 CEPH_OSD_OP_WRITE, 2674 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 2675 snapc, truncate_seq, truncate_size, 2676 true); 2677 if (IS_ERR(req)) 2678 return PTR_ERR(req); 2679 2680 /* it may be a short write due to an object boundary */ 2681 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 2682 false, false); 2683 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 2684 2685 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime); 2686 2687 rc = ceph_osdc_start_request(osdc, req, true); 2688 if (!rc) 2689 rc = ceph_osdc_wait_request(osdc, req); 2690 2691 ceph_osdc_put_request(req); 2692 if (rc == 0) 2693 rc = len; 2694 dout("writepages result %d\n", rc); 2695 return rc; 2696 } 2697 EXPORT_SYMBOL(ceph_osdc_writepages); 2698 2699 int ceph_osdc_setup(void) 2700 { 2701 BUG_ON(ceph_osd_request_cache); 2702 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", 2703 sizeof (struct ceph_osd_request), 2704 __alignof__(struct ceph_osd_request), 2705 0, NULL); 2706 2707 return ceph_osd_request_cache ? 0 : -ENOMEM; 2708 } 2709 EXPORT_SYMBOL(ceph_osdc_setup); 2710 2711 void ceph_osdc_cleanup(void) 2712 { 2713 BUG_ON(!ceph_osd_request_cache); 2714 kmem_cache_destroy(ceph_osd_request_cache); 2715 ceph_osd_request_cache = NULL; 2716 } 2717 EXPORT_SYMBOL(ceph_osdc_cleanup); 2718 2719 /* 2720 * handle incoming message 2721 */ 2722 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 2723 { 2724 struct ceph_osd *osd = con->private; 2725 struct ceph_osd_client *osdc; 2726 int type = le16_to_cpu(msg->hdr.type); 2727 2728 if (!osd) 2729 goto out; 2730 osdc = osd->o_osdc; 2731 2732 switch (type) { 2733 case CEPH_MSG_OSD_MAP: 2734 ceph_osdc_handle_map(osdc, msg); 2735 break; 2736 case CEPH_MSG_OSD_OPREPLY: 2737 handle_reply(osdc, msg, con); 2738 break; 2739 case CEPH_MSG_WATCH_NOTIFY: 2740 handle_watch_notify(osdc, msg); 2741 break; 2742 2743 default: 2744 pr_err("received unknown message type %d %s\n", type, 2745 ceph_msg_type_name(type)); 2746 } 2747 out: 2748 ceph_msg_put(msg); 2749 } 2750 2751 /* 2752 * lookup and return message for incoming reply. set up reply message 2753 * pages. 2754 */ 2755 static struct ceph_msg *get_reply(struct ceph_connection *con, 2756 struct ceph_msg_header *hdr, 2757 int *skip) 2758 { 2759 struct ceph_osd *osd = con->private; 2760 struct ceph_osd_client *osdc = osd->o_osdc; 2761 struct ceph_msg *m; 2762 struct ceph_osd_request *req; 2763 int front_len = le32_to_cpu(hdr->front_len); 2764 int data_len = le32_to_cpu(hdr->data_len); 2765 u64 tid; 2766 2767 tid = le64_to_cpu(hdr->tid); 2768 mutex_lock(&osdc->request_mutex); 2769 req = __lookup_request(osdc, tid); 2770 if (!req) { 2771 *skip = 1; 2772 m = NULL; 2773 dout("get_reply unknown tid %llu from osd%d\n", tid, 2774 osd->o_osd); 2775 goto out; 2776 } 2777 2778 if (req->r_reply->con) 2779 dout("%s revoking msg %p from old con %p\n", __func__, 2780 req->r_reply, req->r_reply->con); 2781 ceph_msg_revoke_incoming(req->r_reply); 2782 2783 if (front_len > req->r_reply->front_alloc_len) { 2784 pr_warn("get_reply front %d > preallocated %d (%u#%llu)\n", 2785 front_len, req->r_reply->front_alloc_len, 2786 (unsigned int)con->peer_name.type, 2787 le64_to_cpu(con->peer_name.num)); 2788 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 2789 false); 2790 if (!m) 2791 goto out; 2792 ceph_msg_put(req->r_reply); 2793 req->r_reply = m; 2794 } 2795 m = ceph_msg_get(req->r_reply); 2796 2797 if (data_len > 0) { 2798 struct ceph_osd_data *osd_data; 2799 2800 /* 2801 * XXX This is assuming there is only one op containing 2802 * XXX page data. Probably OK for reads, but this 2803 * XXX ought to be done more generally. 2804 */ 2805 osd_data = osd_req_op_extent_osd_data(req, 0); 2806 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 2807 if (osd_data->pages && 2808 unlikely(osd_data->length < data_len)) { 2809 2810 pr_warn("tid %lld reply has %d bytes we had only %llu bytes ready\n", 2811 tid, data_len, osd_data->length); 2812 *skip = 1; 2813 ceph_msg_put(m); 2814 m = NULL; 2815 goto out; 2816 } 2817 } 2818 } 2819 *skip = 0; 2820 dout("get_reply tid %lld %p\n", tid, m); 2821 2822 out: 2823 mutex_unlock(&osdc->request_mutex); 2824 return m; 2825 2826 } 2827 2828 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 2829 struct ceph_msg_header *hdr, 2830 int *skip) 2831 { 2832 struct ceph_osd *osd = con->private; 2833 int type = le16_to_cpu(hdr->type); 2834 int front = le32_to_cpu(hdr->front_len); 2835 2836 *skip = 0; 2837 switch (type) { 2838 case CEPH_MSG_OSD_MAP: 2839 case CEPH_MSG_WATCH_NOTIFY: 2840 return ceph_msg_new(type, front, GFP_NOFS, false); 2841 case CEPH_MSG_OSD_OPREPLY: 2842 return get_reply(con, hdr, skip); 2843 default: 2844 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, 2845 osd->o_osd); 2846 *skip = 1; 2847 return NULL; 2848 } 2849 } 2850 2851 /* 2852 * Wrappers to refcount containing ceph_osd struct 2853 */ 2854 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 2855 { 2856 struct ceph_osd *osd = con->private; 2857 if (get_osd(osd)) 2858 return con; 2859 return NULL; 2860 } 2861 2862 static void put_osd_con(struct ceph_connection *con) 2863 { 2864 struct ceph_osd *osd = con->private; 2865 put_osd(osd); 2866 } 2867 2868 /* 2869 * authentication 2870 */ 2871 /* 2872 * Note: returned pointer is the address of a structure that's 2873 * managed separately. Caller must *not* attempt to free it. 2874 */ 2875 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 2876 int *proto, int force_new) 2877 { 2878 struct ceph_osd *o = con->private; 2879 struct ceph_osd_client *osdc = o->o_osdc; 2880 struct ceph_auth_client *ac = osdc->client->monc.auth; 2881 struct ceph_auth_handshake *auth = &o->o_auth; 2882 2883 if (force_new && auth->authorizer) { 2884 ceph_auth_destroy_authorizer(ac, auth->authorizer); 2885 auth->authorizer = NULL; 2886 } 2887 if (!auth->authorizer) { 2888 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2889 auth); 2890 if (ret) 2891 return ERR_PTR(ret); 2892 } else { 2893 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2894 auth); 2895 if (ret) 2896 return ERR_PTR(ret); 2897 } 2898 *proto = ac->protocol; 2899 2900 return auth; 2901 } 2902 2903 2904 static int verify_authorizer_reply(struct ceph_connection *con, int len) 2905 { 2906 struct ceph_osd *o = con->private; 2907 struct ceph_osd_client *osdc = o->o_osdc; 2908 struct ceph_auth_client *ac = osdc->client->monc.auth; 2909 2910 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); 2911 } 2912 2913 static int invalidate_authorizer(struct ceph_connection *con) 2914 { 2915 struct ceph_osd *o = con->private; 2916 struct ceph_osd_client *osdc = o->o_osdc; 2917 struct ceph_auth_client *ac = osdc->client->monc.auth; 2918 2919 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 2920 return ceph_monc_validate_auth(&osdc->client->monc); 2921 } 2922 2923 static const struct ceph_connection_operations osd_con_ops = { 2924 .get = get_osd_con, 2925 .put = put_osd_con, 2926 .dispatch = dispatch, 2927 .get_authorizer = get_authorizer, 2928 .verify_authorizer_reply = verify_authorizer_reply, 2929 .invalidate_authorizer = invalidate_authorizer, 2930 .alloc_msg = alloc_msg, 2931 .fault = osd_reset, 2932 }; 2933