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