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