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