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_unregister_linger_request(struct ceph_osd_client *osdc, 1285 struct ceph_osd_request *req) 1286 { 1287 mutex_lock(&osdc->request_mutex); 1288 if (req->r_linger) 1289 __unregister_linger_request(osdc, req); 1290 mutex_unlock(&osdc->request_mutex); 1291 } 1292 EXPORT_SYMBOL(ceph_osdc_unregister_linger_request); 1293 1294 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 1295 struct ceph_osd_request *req) 1296 { 1297 if (!req->r_linger) { 1298 dout("set_request_linger %p\n", req); 1299 req->r_linger = 1; 1300 } 1301 } 1302 EXPORT_SYMBOL(ceph_osdc_set_request_linger); 1303 1304 /* 1305 * Returns whether a request should be blocked from being sent 1306 * based on the current osdmap and osd_client settings. 1307 * 1308 * Caller should hold map_sem for read. 1309 */ 1310 static bool __req_should_be_paused(struct ceph_osd_client *osdc, 1311 struct ceph_osd_request *req) 1312 { 1313 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); 1314 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || 1315 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 1316 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) || 1317 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr); 1318 } 1319 1320 /* 1321 * Calculate mapping of a request to a PG. Takes tiering into account. 1322 */ 1323 static int __calc_request_pg(struct ceph_osdmap *osdmap, 1324 struct ceph_osd_request *req, 1325 struct ceph_pg *pg_out) 1326 { 1327 bool need_check_tiering; 1328 1329 need_check_tiering = false; 1330 if (req->r_target_oloc.pool == -1) { 1331 req->r_target_oloc = req->r_base_oloc; /* struct */ 1332 need_check_tiering = true; 1333 } 1334 if (req->r_target_oid.name_len == 0) { 1335 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid); 1336 need_check_tiering = true; 1337 } 1338 1339 if (need_check_tiering && 1340 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1341 struct ceph_pg_pool_info *pi; 1342 1343 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool); 1344 if (pi) { 1345 if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1346 pi->read_tier >= 0) 1347 req->r_target_oloc.pool = pi->read_tier; 1348 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1349 pi->write_tier >= 0) 1350 req->r_target_oloc.pool = pi->write_tier; 1351 } 1352 /* !pi is caught in ceph_oloc_oid_to_pg() */ 1353 } 1354 1355 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc, 1356 &req->r_target_oid, pg_out); 1357 } 1358 1359 /* 1360 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct 1361 * (as needed), and set the request r_osd appropriately. If there is 1362 * no up osd, set r_osd to NULL. Move the request to the appropriate list 1363 * (unsent, homeless) or leave on in-flight lru. 1364 * 1365 * Return 0 if unchanged, 1 if changed, or negative on error. 1366 * 1367 * Caller should hold map_sem for read and request_mutex. 1368 */ 1369 static int __map_request(struct ceph_osd_client *osdc, 1370 struct ceph_osd_request *req, int force_resend) 1371 { 1372 struct ceph_pg pgid; 1373 int acting[CEPH_PG_MAX_SIZE]; 1374 int num, o; 1375 int err; 1376 bool was_paused; 1377 1378 dout("map_request %p tid %lld\n", req, req->r_tid); 1379 1380 err = __calc_request_pg(osdc->osdmap, req, &pgid); 1381 if (err) { 1382 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1383 return err; 1384 } 1385 req->r_pgid = pgid; 1386 1387 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o); 1388 if (num < 0) 1389 num = 0; 1390 1391 was_paused = req->r_paused; 1392 req->r_paused = __req_should_be_paused(osdc, req); 1393 if (was_paused && !req->r_paused) 1394 force_resend = 1; 1395 1396 if ((!force_resend && 1397 req->r_osd && req->r_osd->o_osd == o && 1398 req->r_sent >= req->r_osd->o_incarnation && 1399 req->r_num_pg_osds == num && 1400 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || 1401 (req->r_osd == NULL && o == -1) || 1402 req->r_paused) 1403 return 0; /* no change */ 1404 1405 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n", 1406 req->r_tid, pgid.pool, pgid.seed, o, 1407 req->r_osd ? req->r_osd->o_osd : -1); 1408 1409 /* record full pg acting set */ 1410 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); 1411 req->r_num_pg_osds = num; 1412 1413 if (req->r_osd) { 1414 __cancel_request(req); 1415 list_del_init(&req->r_osd_item); 1416 req->r_osd = NULL; 1417 } 1418 1419 req->r_osd = __lookup_osd(osdc, o); 1420 if (!req->r_osd && o >= 0) { 1421 err = -ENOMEM; 1422 req->r_osd = create_osd(osdc, o); 1423 if (!req->r_osd) { 1424 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1425 goto out; 1426 } 1427 1428 dout("map_request osd %p is osd%d\n", req->r_osd, o); 1429 __insert_osd(osdc, req->r_osd); 1430 1431 ceph_con_open(&req->r_osd->o_con, 1432 CEPH_ENTITY_TYPE_OSD, o, 1433 &osdc->osdmap->osd_addr[o]); 1434 } 1435 1436 if (req->r_osd) { 1437 __remove_osd_from_lru(req->r_osd); 1438 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); 1439 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent); 1440 } else { 1441 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget); 1442 } 1443 err = 1; /* osd or pg changed */ 1444 1445 out: 1446 return err; 1447 } 1448 1449 /* 1450 * caller should hold map_sem (for read) and request_mutex 1451 */ 1452 static void __send_request(struct ceph_osd_client *osdc, 1453 struct ceph_osd_request *req) 1454 { 1455 void *p; 1456 1457 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n", 1458 req, req->r_tid, req->r_osd->o_osd, req->r_flags, 1459 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed); 1460 1461 /* fill in message content that changes each time we send it */ 1462 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch); 1463 put_unaligned_le32(req->r_flags, req->r_request_flags); 1464 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool); 1465 p = req->r_request_pgid; 1466 ceph_encode_64(&p, req->r_pgid.pool); 1467 ceph_encode_32(&p, req->r_pgid.seed); 1468 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */ 1469 memcpy(req->r_request_reassert_version, &req->r_reassert_version, 1470 sizeof(req->r_reassert_version)); 1471 1472 req->r_stamp = jiffies; 1473 list_move_tail(&req->r_req_lru_item, &osdc->req_lru); 1474 1475 ceph_msg_get(req->r_request); /* send consumes a ref */ 1476 1477 req->r_sent = req->r_osd->o_incarnation; 1478 1479 ceph_con_send(&req->r_osd->o_con, req->r_request); 1480 } 1481 1482 /* 1483 * Send any requests in the queue (req_unsent). 1484 */ 1485 static void __send_queued(struct ceph_osd_client *osdc) 1486 { 1487 struct ceph_osd_request *req, *tmp; 1488 1489 dout("__send_queued\n"); 1490 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) 1491 __send_request(osdc, req); 1492 } 1493 1494 /* 1495 * Caller should hold map_sem for read and request_mutex. 1496 */ 1497 static int __ceph_osdc_start_request(struct ceph_osd_client *osdc, 1498 struct ceph_osd_request *req, 1499 bool nofail) 1500 { 1501 int rc; 1502 1503 __register_request(osdc, req); 1504 req->r_sent = 0; 1505 req->r_got_reply = 0; 1506 rc = __map_request(osdc, req, 0); 1507 if (rc < 0) { 1508 if (nofail) { 1509 dout("osdc_start_request failed map, " 1510 " will retry %lld\n", req->r_tid); 1511 rc = 0; 1512 } else { 1513 __unregister_request(osdc, req); 1514 } 1515 return rc; 1516 } 1517 1518 if (req->r_osd == NULL) { 1519 dout("send_request %p no up osds in pg\n", req); 1520 ceph_monc_request_next_osdmap(&osdc->client->monc); 1521 } else { 1522 __send_queued(osdc); 1523 } 1524 1525 return 0; 1526 } 1527 1528 /* 1529 * Timeout callback, called every N seconds when 1 or more osd 1530 * requests has been active for more than N seconds. When this 1531 * happens, we ping all OSDs with requests who have timed out to 1532 * ensure any communications channel reset is detected. Reset the 1533 * request timeouts another N seconds in the future as we go. 1534 * Reschedule the timeout event another N seconds in future (unless 1535 * there are no open requests). 1536 */ 1537 static void handle_timeout(struct work_struct *work) 1538 { 1539 struct ceph_osd_client *osdc = 1540 container_of(work, struct ceph_osd_client, timeout_work.work); 1541 struct ceph_osd_request *req; 1542 struct ceph_osd *osd; 1543 unsigned long keepalive = 1544 osdc->client->options->osd_keepalive_timeout * HZ; 1545 struct list_head slow_osds; 1546 dout("timeout\n"); 1547 down_read(&osdc->map_sem); 1548 1549 ceph_monc_request_next_osdmap(&osdc->client->monc); 1550 1551 mutex_lock(&osdc->request_mutex); 1552 1553 /* 1554 * ping osds that are a bit slow. this ensures that if there 1555 * is a break in the TCP connection we will notice, and reopen 1556 * a connection with that osd (from the fault callback). 1557 */ 1558 INIT_LIST_HEAD(&slow_osds); 1559 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { 1560 if (time_before(jiffies, req->r_stamp + keepalive)) 1561 break; 1562 1563 osd = req->r_osd; 1564 BUG_ON(!osd); 1565 dout(" tid %llu is slow, will send keepalive on osd%d\n", 1566 req->r_tid, osd->o_osd); 1567 list_move_tail(&osd->o_keepalive_item, &slow_osds); 1568 } 1569 while (!list_empty(&slow_osds)) { 1570 osd = list_entry(slow_osds.next, struct ceph_osd, 1571 o_keepalive_item); 1572 list_del_init(&osd->o_keepalive_item); 1573 ceph_con_keepalive(&osd->o_con); 1574 } 1575 1576 __schedule_osd_timeout(osdc); 1577 __send_queued(osdc); 1578 mutex_unlock(&osdc->request_mutex); 1579 up_read(&osdc->map_sem); 1580 } 1581 1582 static void handle_osds_timeout(struct work_struct *work) 1583 { 1584 struct ceph_osd_client *osdc = 1585 container_of(work, struct ceph_osd_client, 1586 osds_timeout_work.work); 1587 unsigned long delay = 1588 osdc->client->options->osd_idle_ttl * HZ >> 2; 1589 1590 dout("osds timeout\n"); 1591 down_read(&osdc->map_sem); 1592 remove_old_osds(osdc); 1593 up_read(&osdc->map_sem); 1594 1595 schedule_delayed_work(&osdc->osds_timeout_work, 1596 round_jiffies_relative(delay)); 1597 } 1598 1599 static int ceph_oloc_decode(void **p, void *end, 1600 struct ceph_object_locator *oloc) 1601 { 1602 u8 struct_v, struct_cv; 1603 u32 len; 1604 void *struct_end; 1605 int ret = 0; 1606 1607 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1608 struct_v = ceph_decode_8(p); 1609 struct_cv = ceph_decode_8(p); 1610 if (struct_v < 3) { 1611 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 1612 struct_v, struct_cv); 1613 goto e_inval; 1614 } 1615 if (struct_cv > 6) { 1616 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 1617 struct_v, struct_cv); 1618 goto e_inval; 1619 } 1620 len = ceph_decode_32(p); 1621 ceph_decode_need(p, end, len, e_inval); 1622 struct_end = *p + len; 1623 1624 oloc->pool = ceph_decode_64(p); 1625 *p += 4; /* skip preferred */ 1626 1627 len = ceph_decode_32(p); 1628 if (len > 0) { 1629 pr_warn("ceph_object_locator::key is set\n"); 1630 goto e_inval; 1631 } 1632 1633 if (struct_v >= 5) { 1634 len = ceph_decode_32(p); 1635 if (len > 0) { 1636 pr_warn("ceph_object_locator::nspace is set\n"); 1637 goto e_inval; 1638 } 1639 } 1640 1641 if (struct_v >= 6) { 1642 s64 hash = ceph_decode_64(p); 1643 if (hash != -1) { 1644 pr_warn("ceph_object_locator::hash is set\n"); 1645 goto e_inval; 1646 } 1647 } 1648 1649 /* skip the rest */ 1650 *p = struct_end; 1651 out: 1652 return ret; 1653 1654 e_inval: 1655 ret = -EINVAL; 1656 goto out; 1657 } 1658 1659 static int ceph_redirect_decode(void **p, void *end, 1660 struct ceph_request_redirect *redir) 1661 { 1662 u8 struct_v, struct_cv; 1663 u32 len; 1664 void *struct_end; 1665 int ret; 1666 1667 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1668 struct_v = ceph_decode_8(p); 1669 struct_cv = ceph_decode_8(p); 1670 if (struct_cv > 1) { 1671 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 1672 struct_v, struct_cv); 1673 goto e_inval; 1674 } 1675 len = ceph_decode_32(p); 1676 ceph_decode_need(p, end, len, e_inval); 1677 struct_end = *p + len; 1678 1679 ret = ceph_oloc_decode(p, end, &redir->oloc); 1680 if (ret) 1681 goto out; 1682 1683 len = ceph_decode_32(p); 1684 if (len > 0) { 1685 pr_warn("ceph_request_redirect::object_name is set\n"); 1686 goto e_inval; 1687 } 1688 1689 len = ceph_decode_32(p); 1690 *p += len; /* skip osd_instructions */ 1691 1692 /* skip the rest */ 1693 *p = struct_end; 1694 out: 1695 return ret; 1696 1697 e_inval: 1698 ret = -EINVAL; 1699 goto out; 1700 } 1701 1702 static void complete_request(struct ceph_osd_request *req) 1703 { 1704 complete_all(&req->r_safe_completion); /* fsync waiter */ 1705 } 1706 1707 /* 1708 * handle osd op reply. either call the callback if it is specified, 1709 * or do the completion to wake up the waiting thread. 1710 */ 1711 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, 1712 struct ceph_connection *con) 1713 { 1714 void *p, *end; 1715 struct ceph_osd_request *req; 1716 struct ceph_request_redirect redir; 1717 u64 tid; 1718 int object_len; 1719 unsigned int numops; 1720 int payload_len, flags; 1721 s32 result; 1722 s32 retry_attempt; 1723 struct ceph_pg pg; 1724 int err; 1725 u32 reassert_epoch; 1726 u64 reassert_version; 1727 u32 osdmap_epoch; 1728 int already_completed; 1729 u32 bytes; 1730 unsigned int i; 1731 1732 tid = le64_to_cpu(msg->hdr.tid); 1733 dout("handle_reply %p tid %llu\n", msg, tid); 1734 1735 p = msg->front.iov_base; 1736 end = p + msg->front.iov_len; 1737 1738 ceph_decode_need(&p, end, 4, bad); 1739 object_len = ceph_decode_32(&p); 1740 ceph_decode_need(&p, end, object_len, bad); 1741 p += object_len; 1742 1743 err = ceph_decode_pgid(&p, end, &pg); 1744 if (err) 1745 goto bad; 1746 1747 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad); 1748 flags = ceph_decode_64(&p); 1749 result = ceph_decode_32(&p); 1750 reassert_epoch = ceph_decode_32(&p); 1751 reassert_version = ceph_decode_64(&p); 1752 osdmap_epoch = ceph_decode_32(&p); 1753 1754 /* lookup */ 1755 down_read(&osdc->map_sem); 1756 mutex_lock(&osdc->request_mutex); 1757 req = __lookup_request(osdc, tid); 1758 if (req == NULL) { 1759 dout("handle_reply tid %llu dne\n", tid); 1760 goto bad_mutex; 1761 } 1762 ceph_osdc_get_request(req); 1763 1764 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid, 1765 req, result); 1766 1767 ceph_decode_need(&p, end, 4, bad_put); 1768 numops = ceph_decode_32(&p); 1769 if (numops > CEPH_OSD_MAX_OP) 1770 goto bad_put; 1771 if (numops != req->r_num_ops) 1772 goto bad_put; 1773 payload_len = 0; 1774 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put); 1775 for (i = 0; i < numops; i++) { 1776 struct ceph_osd_op *op = p; 1777 int len; 1778 1779 len = le32_to_cpu(op->payload_len); 1780 req->r_reply_op_len[i] = len; 1781 dout(" op %d has %d bytes\n", i, len); 1782 payload_len += len; 1783 p += sizeof(*op); 1784 } 1785 bytes = le32_to_cpu(msg->hdr.data_len); 1786 if (payload_len != bytes) { 1787 pr_warning("sum of op payload lens %d != data_len %d", 1788 payload_len, bytes); 1789 goto bad_put; 1790 } 1791 1792 ceph_decode_need(&p, end, 4 + numops * 4, bad_put); 1793 retry_attempt = ceph_decode_32(&p); 1794 for (i = 0; i < numops; i++) 1795 req->r_reply_op_result[i] = ceph_decode_32(&p); 1796 1797 if (le16_to_cpu(msg->hdr.version) >= 6) { 1798 p += 8 + 4; /* skip replay_version */ 1799 p += 8; /* skip user_version */ 1800 1801 err = ceph_redirect_decode(&p, end, &redir); 1802 if (err) 1803 goto bad_put; 1804 } else { 1805 redir.oloc.pool = -1; 1806 } 1807 1808 if (redir.oloc.pool != -1) { 1809 dout("redirect pool %lld\n", redir.oloc.pool); 1810 1811 __unregister_request(osdc, req); 1812 1813 req->r_target_oloc = redir.oloc; /* struct */ 1814 1815 /* 1816 * Start redirect requests with nofail=true. If 1817 * mapping fails, request will end up on the notarget 1818 * list, waiting for the new osdmap (which can take 1819 * a while), even though the original request mapped 1820 * successfully. In the future we might want to follow 1821 * original request's nofail setting here. 1822 */ 1823 err = __ceph_osdc_start_request(osdc, req, true); 1824 BUG_ON(err); 1825 1826 goto out_unlock; 1827 } 1828 1829 already_completed = req->r_got_reply; 1830 if (!req->r_got_reply) { 1831 req->r_result = result; 1832 dout("handle_reply result %d bytes %d\n", req->r_result, 1833 bytes); 1834 if (req->r_result == 0) 1835 req->r_result = bytes; 1836 1837 /* in case this is a write and we need to replay, */ 1838 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch); 1839 req->r_reassert_version.version = cpu_to_le64(reassert_version); 1840 1841 req->r_got_reply = 1; 1842 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { 1843 dout("handle_reply tid %llu dup ack\n", tid); 1844 goto out_unlock; 1845 } 1846 1847 dout("handle_reply tid %llu flags %d\n", tid, flags); 1848 1849 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) 1850 __register_linger_request(osdc, req); 1851 1852 /* either this is a read, or we got the safe response */ 1853 if (result < 0 || 1854 (flags & CEPH_OSD_FLAG_ONDISK) || 1855 ((flags & CEPH_OSD_FLAG_WRITE) == 0)) 1856 __unregister_request(osdc, req); 1857 1858 mutex_unlock(&osdc->request_mutex); 1859 up_read(&osdc->map_sem); 1860 1861 if (!already_completed) { 1862 if (req->r_unsafe_callback && 1863 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK)) 1864 req->r_unsafe_callback(req, true); 1865 if (req->r_callback) 1866 req->r_callback(req, msg); 1867 else 1868 complete_all(&req->r_completion); 1869 } 1870 1871 if (flags & CEPH_OSD_FLAG_ONDISK) { 1872 if (req->r_unsafe_callback && already_completed) 1873 req->r_unsafe_callback(req, false); 1874 complete_request(req); 1875 } 1876 1877 out: 1878 dout("req=%p req->r_linger=%d\n", req, req->r_linger); 1879 ceph_osdc_put_request(req); 1880 return; 1881 out_unlock: 1882 mutex_unlock(&osdc->request_mutex); 1883 up_read(&osdc->map_sem); 1884 goto out; 1885 1886 bad_put: 1887 req->r_result = -EIO; 1888 __unregister_request(osdc, req); 1889 if (req->r_callback) 1890 req->r_callback(req, msg); 1891 else 1892 complete_all(&req->r_completion); 1893 complete_request(req); 1894 ceph_osdc_put_request(req); 1895 bad_mutex: 1896 mutex_unlock(&osdc->request_mutex); 1897 up_read(&osdc->map_sem); 1898 bad: 1899 pr_err("corrupt osd_op_reply got %d %d\n", 1900 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len)); 1901 ceph_msg_dump(msg); 1902 } 1903 1904 static void reset_changed_osds(struct ceph_osd_client *osdc) 1905 { 1906 struct rb_node *p, *n; 1907 1908 for (p = rb_first(&osdc->osds); p; p = n) { 1909 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); 1910 1911 n = rb_next(p); 1912 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 1913 memcmp(&osd->o_con.peer_addr, 1914 ceph_osd_addr(osdc->osdmap, 1915 osd->o_osd), 1916 sizeof(struct ceph_entity_addr)) != 0) 1917 __reset_osd(osdc, osd); 1918 } 1919 } 1920 1921 /* 1922 * Requeue requests whose mapping to an OSD has changed. If requests map to 1923 * no osd, request a new map. 1924 * 1925 * Caller should hold map_sem for read. 1926 */ 1927 static void kick_requests(struct ceph_osd_client *osdc, bool force_resend, 1928 bool force_resend_writes) 1929 { 1930 struct ceph_osd_request *req, *nreq; 1931 struct rb_node *p; 1932 int needmap = 0; 1933 int err; 1934 bool force_resend_req; 1935 1936 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "", 1937 force_resend_writes ? " (force resend writes)" : ""); 1938 mutex_lock(&osdc->request_mutex); 1939 for (p = rb_first(&osdc->requests); p; ) { 1940 req = rb_entry(p, struct ceph_osd_request, r_node); 1941 p = rb_next(p); 1942 1943 /* 1944 * For linger requests that have not yet been 1945 * registered, move them to the linger list; they'll 1946 * be sent to the osd in the loop below. Unregister 1947 * the request before re-registering it as a linger 1948 * request to ensure the __map_request() below 1949 * will decide it needs to be sent. 1950 */ 1951 if (req->r_linger && list_empty(&req->r_linger_item)) { 1952 dout("%p tid %llu restart on osd%d\n", 1953 req, req->r_tid, 1954 req->r_osd ? req->r_osd->o_osd : -1); 1955 ceph_osdc_get_request(req); 1956 __unregister_request(osdc, req); 1957 __register_linger_request(osdc, req); 1958 ceph_osdc_put_request(req); 1959 continue; 1960 } 1961 1962 force_resend_req = force_resend || 1963 (force_resend_writes && 1964 req->r_flags & CEPH_OSD_FLAG_WRITE); 1965 err = __map_request(osdc, req, force_resend_req); 1966 if (err < 0) 1967 continue; /* error */ 1968 if (req->r_osd == NULL) { 1969 dout("%p tid %llu maps to no osd\n", req, req->r_tid); 1970 needmap++; /* request a newer map */ 1971 } else if (err > 0) { 1972 if (!req->r_linger) { 1973 dout("%p tid %llu requeued on osd%d\n", req, 1974 req->r_tid, 1975 req->r_osd ? req->r_osd->o_osd : -1); 1976 req->r_flags |= CEPH_OSD_FLAG_RETRY; 1977 } 1978 } 1979 } 1980 1981 list_for_each_entry_safe(req, nreq, &osdc->req_linger, 1982 r_linger_item) { 1983 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); 1984 1985 err = __map_request(osdc, req, 1986 force_resend || force_resend_writes); 1987 dout("__map_request returned %d\n", err); 1988 if (err == 0) 1989 continue; /* no change and no osd was specified */ 1990 if (err < 0) 1991 continue; /* hrm! */ 1992 if (req->r_osd == NULL) { 1993 dout("tid %llu maps to no valid osd\n", req->r_tid); 1994 needmap++; /* request a newer map */ 1995 continue; 1996 } 1997 1998 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid, 1999 req->r_osd ? req->r_osd->o_osd : -1); 2000 __register_request(osdc, req); 2001 __unregister_linger_request(osdc, req); 2002 } 2003 reset_changed_osds(osdc); 2004 mutex_unlock(&osdc->request_mutex); 2005 2006 if (needmap) { 2007 dout("%d requests for down osds, need new map\n", needmap); 2008 ceph_monc_request_next_osdmap(&osdc->client->monc); 2009 } 2010 } 2011 2012 2013 /* 2014 * Process updated osd map. 2015 * 2016 * The message contains any number of incremental and full maps, normally 2017 * indicating some sort of topology change in the cluster. Kick requests 2018 * off to different OSDs as needed. 2019 */ 2020 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 2021 { 2022 void *p, *end, *next; 2023 u32 nr_maps, maplen; 2024 u32 epoch; 2025 struct ceph_osdmap *newmap = NULL, *oldmap; 2026 int err; 2027 struct ceph_fsid fsid; 2028 bool was_full; 2029 2030 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); 2031 p = msg->front.iov_base; 2032 end = p + msg->front.iov_len; 2033 2034 /* verify fsid */ 2035 ceph_decode_need(&p, end, sizeof(fsid), bad); 2036 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 2037 if (ceph_check_fsid(osdc->client, &fsid) < 0) 2038 return; 2039 2040 down_write(&osdc->map_sem); 2041 2042 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 2043 2044 /* incremental maps */ 2045 ceph_decode_32_safe(&p, end, nr_maps, bad); 2046 dout(" %d inc maps\n", nr_maps); 2047 while (nr_maps > 0) { 2048 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2049 epoch = ceph_decode_32(&p); 2050 maplen = ceph_decode_32(&p); 2051 ceph_decode_need(&p, end, maplen, bad); 2052 next = p + maplen; 2053 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { 2054 dout("applying incremental map %u len %d\n", 2055 epoch, maplen); 2056 newmap = osdmap_apply_incremental(&p, next, 2057 osdc->osdmap, 2058 &osdc->client->msgr); 2059 if (IS_ERR(newmap)) { 2060 err = PTR_ERR(newmap); 2061 goto bad; 2062 } 2063 BUG_ON(!newmap); 2064 if (newmap != osdc->osdmap) { 2065 ceph_osdmap_destroy(osdc->osdmap); 2066 osdc->osdmap = newmap; 2067 } 2068 was_full = was_full || 2069 ceph_osdmap_flag(osdc->osdmap, 2070 CEPH_OSDMAP_FULL); 2071 kick_requests(osdc, 0, was_full); 2072 } else { 2073 dout("ignoring incremental map %u len %d\n", 2074 epoch, maplen); 2075 } 2076 p = next; 2077 nr_maps--; 2078 } 2079 if (newmap) 2080 goto done; 2081 2082 /* full maps */ 2083 ceph_decode_32_safe(&p, end, nr_maps, bad); 2084 dout(" %d full maps\n", nr_maps); 2085 while (nr_maps) { 2086 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2087 epoch = ceph_decode_32(&p); 2088 maplen = ceph_decode_32(&p); 2089 ceph_decode_need(&p, end, maplen, bad); 2090 if (nr_maps > 1) { 2091 dout("skipping non-latest full map %u len %d\n", 2092 epoch, maplen); 2093 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { 2094 dout("skipping full map %u len %d, " 2095 "older than our %u\n", epoch, maplen, 2096 osdc->osdmap->epoch); 2097 } else { 2098 int skipped_map = 0; 2099 2100 dout("taking full map %u len %d\n", epoch, maplen); 2101 newmap = ceph_osdmap_decode(&p, p+maplen); 2102 if (IS_ERR(newmap)) { 2103 err = PTR_ERR(newmap); 2104 goto bad; 2105 } 2106 BUG_ON(!newmap); 2107 oldmap = osdc->osdmap; 2108 osdc->osdmap = newmap; 2109 if (oldmap) { 2110 if (oldmap->epoch + 1 < newmap->epoch) 2111 skipped_map = 1; 2112 ceph_osdmap_destroy(oldmap); 2113 } 2114 was_full = was_full || 2115 ceph_osdmap_flag(osdc->osdmap, 2116 CEPH_OSDMAP_FULL); 2117 kick_requests(osdc, skipped_map, was_full); 2118 } 2119 p += maplen; 2120 nr_maps--; 2121 } 2122 2123 if (!osdc->osdmap) 2124 goto bad; 2125 done: 2126 downgrade_write(&osdc->map_sem); 2127 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); 2128 2129 /* 2130 * subscribe to subsequent osdmap updates if full to ensure 2131 * we find out when we are no longer full and stop returning 2132 * ENOSPC. 2133 */ 2134 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 2135 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) || 2136 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) 2137 ceph_monc_request_next_osdmap(&osdc->client->monc); 2138 2139 mutex_lock(&osdc->request_mutex); 2140 __send_queued(osdc); 2141 mutex_unlock(&osdc->request_mutex); 2142 up_read(&osdc->map_sem); 2143 wake_up_all(&osdc->client->auth_wq); 2144 return; 2145 2146 bad: 2147 pr_err("osdc handle_map corrupt msg\n"); 2148 ceph_msg_dump(msg); 2149 up_write(&osdc->map_sem); 2150 } 2151 2152 /* 2153 * watch/notify callback event infrastructure 2154 * 2155 * These callbacks are used both for watch and notify operations. 2156 */ 2157 static void __release_event(struct kref *kref) 2158 { 2159 struct ceph_osd_event *event = 2160 container_of(kref, struct ceph_osd_event, kref); 2161 2162 dout("__release_event %p\n", event); 2163 kfree(event); 2164 } 2165 2166 static void get_event(struct ceph_osd_event *event) 2167 { 2168 kref_get(&event->kref); 2169 } 2170 2171 void ceph_osdc_put_event(struct ceph_osd_event *event) 2172 { 2173 kref_put(&event->kref, __release_event); 2174 } 2175 EXPORT_SYMBOL(ceph_osdc_put_event); 2176 2177 static void __insert_event(struct ceph_osd_client *osdc, 2178 struct ceph_osd_event *new) 2179 { 2180 struct rb_node **p = &osdc->event_tree.rb_node; 2181 struct rb_node *parent = NULL; 2182 struct ceph_osd_event *event = NULL; 2183 2184 while (*p) { 2185 parent = *p; 2186 event = rb_entry(parent, struct ceph_osd_event, node); 2187 if (new->cookie < event->cookie) 2188 p = &(*p)->rb_left; 2189 else if (new->cookie > event->cookie) 2190 p = &(*p)->rb_right; 2191 else 2192 BUG(); 2193 } 2194 2195 rb_link_node(&new->node, parent, p); 2196 rb_insert_color(&new->node, &osdc->event_tree); 2197 } 2198 2199 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, 2200 u64 cookie) 2201 { 2202 struct rb_node **p = &osdc->event_tree.rb_node; 2203 struct rb_node *parent = NULL; 2204 struct ceph_osd_event *event = NULL; 2205 2206 while (*p) { 2207 parent = *p; 2208 event = rb_entry(parent, struct ceph_osd_event, node); 2209 if (cookie < event->cookie) 2210 p = &(*p)->rb_left; 2211 else if (cookie > event->cookie) 2212 p = &(*p)->rb_right; 2213 else 2214 return event; 2215 } 2216 return NULL; 2217 } 2218 2219 static void __remove_event(struct ceph_osd_event *event) 2220 { 2221 struct ceph_osd_client *osdc = event->osdc; 2222 2223 if (!RB_EMPTY_NODE(&event->node)) { 2224 dout("__remove_event removed %p\n", event); 2225 rb_erase(&event->node, &osdc->event_tree); 2226 ceph_osdc_put_event(event); 2227 } else { 2228 dout("__remove_event didn't remove %p\n", event); 2229 } 2230 } 2231 2232 int ceph_osdc_create_event(struct ceph_osd_client *osdc, 2233 void (*event_cb)(u64, u64, u8, void *), 2234 void *data, struct ceph_osd_event **pevent) 2235 { 2236 struct ceph_osd_event *event; 2237 2238 event = kmalloc(sizeof(*event), GFP_NOIO); 2239 if (!event) 2240 return -ENOMEM; 2241 2242 dout("create_event %p\n", event); 2243 event->cb = event_cb; 2244 event->one_shot = 0; 2245 event->data = data; 2246 event->osdc = osdc; 2247 INIT_LIST_HEAD(&event->osd_node); 2248 RB_CLEAR_NODE(&event->node); 2249 kref_init(&event->kref); /* one ref for us */ 2250 kref_get(&event->kref); /* one ref for the caller */ 2251 2252 spin_lock(&osdc->event_lock); 2253 event->cookie = ++osdc->event_count; 2254 __insert_event(osdc, event); 2255 spin_unlock(&osdc->event_lock); 2256 2257 *pevent = event; 2258 return 0; 2259 } 2260 EXPORT_SYMBOL(ceph_osdc_create_event); 2261 2262 void ceph_osdc_cancel_event(struct ceph_osd_event *event) 2263 { 2264 struct ceph_osd_client *osdc = event->osdc; 2265 2266 dout("cancel_event %p\n", event); 2267 spin_lock(&osdc->event_lock); 2268 __remove_event(event); 2269 spin_unlock(&osdc->event_lock); 2270 ceph_osdc_put_event(event); /* caller's */ 2271 } 2272 EXPORT_SYMBOL(ceph_osdc_cancel_event); 2273 2274 2275 static void do_event_work(struct work_struct *work) 2276 { 2277 struct ceph_osd_event_work *event_work = 2278 container_of(work, struct ceph_osd_event_work, work); 2279 struct ceph_osd_event *event = event_work->event; 2280 u64 ver = event_work->ver; 2281 u64 notify_id = event_work->notify_id; 2282 u8 opcode = event_work->opcode; 2283 2284 dout("do_event_work completing %p\n", event); 2285 event->cb(ver, notify_id, opcode, event->data); 2286 dout("do_event_work completed %p\n", event); 2287 ceph_osdc_put_event(event); 2288 kfree(event_work); 2289 } 2290 2291 2292 /* 2293 * Process osd watch notifications 2294 */ 2295 static void handle_watch_notify(struct ceph_osd_client *osdc, 2296 struct ceph_msg *msg) 2297 { 2298 void *p, *end; 2299 u8 proto_ver; 2300 u64 cookie, ver, notify_id; 2301 u8 opcode; 2302 struct ceph_osd_event *event; 2303 struct ceph_osd_event_work *event_work; 2304 2305 p = msg->front.iov_base; 2306 end = p + msg->front.iov_len; 2307 2308 ceph_decode_8_safe(&p, end, proto_ver, bad); 2309 ceph_decode_8_safe(&p, end, opcode, bad); 2310 ceph_decode_64_safe(&p, end, cookie, bad); 2311 ceph_decode_64_safe(&p, end, ver, bad); 2312 ceph_decode_64_safe(&p, end, notify_id, bad); 2313 2314 spin_lock(&osdc->event_lock); 2315 event = __find_event(osdc, cookie); 2316 if (event) { 2317 BUG_ON(event->one_shot); 2318 get_event(event); 2319 } 2320 spin_unlock(&osdc->event_lock); 2321 dout("handle_watch_notify cookie %lld ver %lld event %p\n", 2322 cookie, ver, event); 2323 if (event) { 2324 event_work = kmalloc(sizeof(*event_work), GFP_NOIO); 2325 if (!event_work) { 2326 dout("ERROR: could not allocate event_work\n"); 2327 goto done_err; 2328 } 2329 INIT_WORK(&event_work->work, do_event_work); 2330 event_work->event = event; 2331 event_work->ver = ver; 2332 event_work->notify_id = notify_id; 2333 event_work->opcode = opcode; 2334 if (!queue_work(osdc->notify_wq, &event_work->work)) { 2335 dout("WARNING: failed to queue notify event work\n"); 2336 goto done_err; 2337 } 2338 } 2339 2340 return; 2341 2342 done_err: 2343 ceph_osdc_put_event(event); 2344 return; 2345 2346 bad: 2347 pr_err("osdc handle_watch_notify corrupt msg\n"); 2348 } 2349 2350 /* 2351 * build new request AND message 2352 * 2353 */ 2354 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 2355 struct ceph_snap_context *snapc, u64 snap_id, 2356 struct timespec *mtime) 2357 { 2358 struct ceph_msg *msg = req->r_request; 2359 void *p; 2360 size_t msg_size; 2361 int flags = req->r_flags; 2362 u64 data_len; 2363 unsigned int i; 2364 2365 req->r_snapid = snap_id; 2366 req->r_snapc = ceph_get_snap_context(snapc); 2367 2368 /* encode request */ 2369 msg->hdr.version = cpu_to_le16(4); 2370 2371 p = msg->front.iov_base; 2372 ceph_encode_32(&p, 1); /* client_inc is always 1 */ 2373 req->r_request_osdmap_epoch = p; 2374 p += 4; 2375 req->r_request_flags = p; 2376 p += 4; 2377 if (req->r_flags & CEPH_OSD_FLAG_WRITE) 2378 ceph_encode_timespec(p, mtime); 2379 p += sizeof(struct ceph_timespec); 2380 req->r_request_reassert_version = p; 2381 p += sizeof(struct ceph_eversion); /* will get filled in */ 2382 2383 /* oloc */ 2384 ceph_encode_8(&p, 4); 2385 ceph_encode_8(&p, 4); 2386 ceph_encode_32(&p, 8 + 4 + 4); 2387 req->r_request_pool = p; 2388 p += 8; 2389 ceph_encode_32(&p, -1); /* preferred */ 2390 ceph_encode_32(&p, 0); /* key len */ 2391 2392 ceph_encode_8(&p, 1); 2393 req->r_request_pgid = p; 2394 p += 8 + 4; 2395 ceph_encode_32(&p, -1); /* preferred */ 2396 2397 /* oid */ 2398 ceph_encode_32(&p, req->r_base_oid.name_len); 2399 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len); 2400 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len, 2401 req->r_base_oid.name, req->r_base_oid.name_len); 2402 p += req->r_base_oid.name_len; 2403 2404 /* ops--can imply data */ 2405 ceph_encode_16(&p, (u16)req->r_num_ops); 2406 data_len = 0; 2407 for (i = 0; i < req->r_num_ops; i++) { 2408 data_len += osd_req_encode_op(req, p, i); 2409 p += sizeof(struct ceph_osd_op); 2410 } 2411 2412 /* snaps */ 2413 ceph_encode_64(&p, req->r_snapid); 2414 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0); 2415 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0); 2416 if (req->r_snapc) { 2417 for (i = 0; i < snapc->num_snaps; i++) { 2418 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2419 } 2420 } 2421 2422 req->r_request_attempts = p; 2423 p += 4; 2424 2425 /* data */ 2426 if (flags & CEPH_OSD_FLAG_WRITE) { 2427 u16 data_off; 2428 2429 /* 2430 * The header "data_off" is a hint to the receiver 2431 * allowing it to align received data into its 2432 * buffers such that there's no need to re-copy 2433 * it before writing it to disk (direct I/O). 2434 */ 2435 data_off = (u16) (off & 0xffff); 2436 req->r_request->hdr.data_off = cpu_to_le16(data_off); 2437 } 2438 req->r_request->hdr.data_len = cpu_to_le32(data_len); 2439 2440 BUG_ON(p > msg->front.iov_base + msg->front.iov_len); 2441 msg_size = p - msg->front.iov_base; 2442 msg->front.iov_len = msg_size; 2443 msg->hdr.front_len = cpu_to_le32(msg_size); 2444 2445 dout("build_request msg_size was %d\n", (int)msg_size); 2446 } 2447 EXPORT_SYMBOL(ceph_osdc_build_request); 2448 2449 /* 2450 * Register request, send initial attempt. 2451 */ 2452 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 2453 struct ceph_osd_request *req, 2454 bool nofail) 2455 { 2456 int rc; 2457 2458 down_read(&osdc->map_sem); 2459 mutex_lock(&osdc->request_mutex); 2460 2461 rc = __ceph_osdc_start_request(osdc, req, nofail); 2462 2463 mutex_unlock(&osdc->request_mutex); 2464 up_read(&osdc->map_sem); 2465 2466 return rc; 2467 } 2468 EXPORT_SYMBOL(ceph_osdc_start_request); 2469 2470 /* 2471 * Unregister a registered request. The request is not completed (i.e. 2472 * no callbacks or wakeups) - higher layers are supposed to know what 2473 * they are canceling. 2474 */ 2475 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 2476 { 2477 struct ceph_osd_client *osdc = req->r_osdc; 2478 2479 mutex_lock(&osdc->request_mutex); 2480 if (req->r_linger) 2481 __unregister_linger_request(osdc, req); 2482 __unregister_request(osdc, req); 2483 mutex_unlock(&osdc->request_mutex); 2484 2485 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid); 2486 } 2487 EXPORT_SYMBOL(ceph_osdc_cancel_request); 2488 2489 /* 2490 * wait for a request to complete 2491 */ 2492 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 2493 struct ceph_osd_request *req) 2494 { 2495 int rc; 2496 2497 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 2498 2499 rc = wait_for_completion_interruptible(&req->r_completion); 2500 if (rc < 0) { 2501 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid); 2502 ceph_osdc_cancel_request(req); 2503 complete_request(req); 2504 return rc; 2505 } 2506 2507 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid, 2508 req->r_result); 2509 return req->r_result; 2510 } 2511 EXPORT_SYMBOL(ceph_osdc_wait_request); 2512 2513 /* 2514 * sync - wait for all in-flight requests to flush. avoid starvation. 2515 */ 2516 void ceph_osdc_sync(struct ceph_osd_client *osdc) 2517 { 2518 struct ceph_osd_request *req; 2519 u64 last_tid, next_tid = 0; 2520 2521 mutex_lock(&osdc->request_mutex); 2522 last_tid = osdc->last_tid; 2523 while (1) { 2524 req = __lookup_request_ge(osdc, next_tid); 2525 if (!req) 2526 break; 2527 if (req->r_tid > last_tid) 2528 break; 2529 2530 next_tid = req->r_tid + 1; 2531 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) 2532 continue; 2533 2534 ceph_osdc_get_request(req); 2535 mutex_unlock(&osdc->request_mutex); 2536 dout("sync waiting on tid %llu (last is %llu)\n", 2537 req->r_tid, last_tid); 2538 wait_for_completion(&req->r_safe_completion); 2539 mutex_lock(&osdc->request_mutex); 2540 ceph_osdc_put_request(req); 2541 } 2542 mutex_unlock(&osdc->request_mutex); 2543 dout("sync done (thru tid %llu)\n", last_tid); 2544 } 2545 EXPORT_SYMBOL(ceph_osdc_sync); 2546 2547 /* 2548 * Call all pending notify callbacks - for use after a watch is 2549 * unregistered, to make sure no more callbacks for it will be invoked 2550 */ 2551 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 2552 { 2553 flush_workqueue(osdc->notify_wq); 2554 } 2555 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 2556 2557 2558 /* 2559 * init, shutdown 2560 */ 2561 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 2562 { 2563 int err; 2564 2565 dout("init\n"); 2566 osdc->client = client; 2567 osdc->osdmap = NULL; 2568 init_rwsem(&osdc->map_sem); 2569 init_completion(&osdc->map_waiters); 2570 osdc->last_requested_map = 0; 2571 mutex_init(&osdc->request_mutex); 2572 osdc->last_tid = 0; 2573 osdc->osds = RB_ROOT; 2574 INIT_LIST_HEAD(&osdc->osd_lru); 2575 osdc->requests = RB_ROOT; 2576 INIT_LIST_HEAD(&osdc->req_lru); 2577 INIT_LIST_HEAD(&osdc->req_unsent); 2578 INIT_LIST_HEAD(&osdc->req_notarget); 2579 INIT_LIST_HEAD(&osdc->req_linger); 2580 osdc->num_requests = 0; 2581 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 2582 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 2583 spin_lock_init(&osdc->event_lock); 2584 osdc->event_tree = RB_ROOT; 2585 osdc->event_count = 0; 2586 2587 schedule_delayed_work(&osdc->osds_timeout_work, 2588 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); 2589 2590 err = -ENOMEM; 2591 osdc->req_mempool = mempool_create_kmalloc_pool(10, 2592 sizeof(struct ceph_osd_request)); 2593 if (!osdc->req_mempool) 2594 goto out; 2595 2596 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 2597 OSD_OP_FRONT_LEN, 10, true, 2598 "osd_op"); 2599 if (err < 0) 2600 goto out_mempool; 2601 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 2602 OSD_OPREPLY_FRONT_LEN, 10, true, 2603 "osd_op_reply"); 2604 if (err < 0) 2605 goto out_msgpool; 2606 2607 err = -ENOMEM; 2608 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 2609 if (!osdc->notify_wq) 2610 goto out_msgpool_reply; 2611 2612 return 0; 2613 2614 out_msgpool_reply: 2615 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2616 out_msgpool: 2617 ceph_msgpool_destroy(&osdc->msgpool_op); 2618 out_mempool: 2619 mempool_destroy(osdc->req_mempool); 2620 out: 2621 return err; 2622 } 2623 2624 void ceph_osdc_stop(struct ceph_osd_client *osdc) 2625 { 2626 flush_workqueue(osdc->notify_wq); 2627 destroy_workqueue(osdc->notify_wq); 2628 cancel_delayed_work_sync(&osdc->timeout_work); 2629 cancel_delayed_work_sync(&osdc->osds_timeout_work); 2630 if (osdc->osdmap) { 2631 ceph_osdmap_destroy(osdc->osdmap); 2632 osdc->osdmap = NULL; 2633 } 2634 remove_all_osds(osdc); 2635 mempool_destroy(osdc->req_mempool); 2636 ceph_msgpool_destroy(&osdc->msgpool_op); 2637 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2638 } 2639 2640 /* 2641 * Read some contiguous pages. If we cross a stripe boundary, shorten 2642 * *plen. Return number of bytes read, or error. 2643 */ 2644 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 2645 struct ceph_vino vino, struct ceph_file_layout *layout, 2646 u64 off, u64 *plen, 2647 u32 truncate_seq, u64 truncate_size, 2648 struct page **pages, int num_pages, int page_align) 2649 { 2650 struct ceph_osd_request *req; 2651 int rc = 0; 2652 2653 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 2654 vino.snap, off, *plen); 2655 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1, 2656 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 2657 NULL, truncate_seq, truncate_size, 2658 false); 2659 if (IS_ERR(req)) 2660 return PTR_ERR(req); 2661 2662 /* it may be a short read due to an object boundary */ 2663 2664 osd_req_op_extent_osd_data_pages(req, 0, 2665 pages, *plen, page_align, false, false); 2666 2667 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 2668 off, *plen, *plen, page_align); 2669 2670 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL); 2671 2672 rc = ceph_osdc_start_request(osdc, req, false); 2673 if (!rc) 2674 rc = ceph_osdc_wait_request(osdc, req); 2675 2676 ceph_osdc_put_request(req); 2677 dout("readpages result %d\n", rc); 2678 return rc; 2679 } 2680 EXPORT_SYMBOL(ceph_osdc_readpages); 2681 2682 /* 2683 * do a synchronous write on N pages 2684 */ 2685 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 2686 struct ceph_file_layout *layout, 2687 struct ceph_snap_context *snapc, 2688 u64 off, u64 len, 2689 u32 truncate_seq, u64 truncate_size, 2690 struct timespec *mtime, 2691 struct page **pages, int num_pages) 2692 { 2693 struct ceph_osd_request *req; 2694 int rc = 0; 2695 int page_align = off & ~PAGE_MASK; 2696 2697 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */ 2698 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1, 2699 CEPH_OSD_OP_WRITE, 2700 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 2701 snapc, truncate_seq, truncate_size, 2702 true); 2703 if (IS_ERR(req)) 2704 return PTR_ERR(req); 2705 2706 /* it may be a short write due to an object boundary */ 2707 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 2708 false, false); 2709 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 2710 2711 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime); 2712 2713 rc = ceph_osdc_start_request(osdc, req, true); 2714 if (!rc) 2715 rc = ceph_osdc_wait_request(osdc, req); 2716 2717 ceph_osdc_put_request(req); 2718 if (rc == 0) 2719 rc = len; 2720 dout("writepages result %d\n", rc); 2721 return rc; 2722 } 2723 EXPORT_SYMBOL(ceph_osdc_writepages); 2724 2725 int ceph_osdc_setup(void) 2726 { 2727 BUG_ON(ceph_osd_request_cache); 2728 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", 2729 sizeof (struct ceph_osd_request), 2730 __alignof__(struct ceph_osd_request), 2731 0, NULL); 2732 2733 return ceph_osd_request_cache ? 0 : -ENOMEM; 2734 } 2735 EXPORT_SYMBOL(ceph_osdc_setup); 2736 2737 void ceph_osdc_cleanup(void) 2738 { 2739 BUG_ON(!ceph_osd_request_cache); 2740 kmem_cache_destroy(ceph_osd_request_cache); 2741 ceph_osd_request_cache = NULL; 2742 } 2743 EXPORT_SYMBOL(ceph_osdc_cleanup); 2744 2745 /* 2746 * handle incoming message 2747 */ 2748 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 2749 { 2750 struct ceph_osd *osd = con->private; 2751 struct ceph_osd_client *osdc; 2752 int type = le16_to_cpu(msg->hdr.type); 2753 2754 if (!osd) 2755 goto out; 2756 osdc = osd->o_osdc; 2757 2758 switch (type) { 2759 case CEPH_MSG_OSD_MAP: 2760 ceph_osdc_handle_map(osdc, msg); 2761 break; 2762 case CEPH_MSG_OSD_OPREPLY: 2763 handle_reply(osdc, msg, con); 2764 break; 2765 case CEPH_MSG_WATCH_NOTIFY: 2766 handle_watch_notify(osdc, msg); 2767 break; 2768 2769 default: 2770 pr_err("received unknown message type %d %s\n", type, 2771 ceph_msg_type_name(type)); 2772 } 2773 out: 2774 ceph_msg_put(msg); 2775 } 2776 2777 /* 2778 * lookup and return message for incoming reply. set up reply message 2779 * pages. 2780 */ 2781 static struct ceph_msg *get_reply(struct ceph_connection *con, 2782 struct ceph_msg_header *hdr, 2783 int *skip) 2784 { 2785 struct ceph_osd *osd = con->private; 2786 struct ceph_osd_client *osdc = osd->o_osdc; 2787 struct ceph_msg *m; 2788 struct ceph_osd_request *req; 2789 int front_len = le32_to_cpu(hdr->front_len); 2790 int data_len = le32_to_cpu(hdr->data_len); 2791 u64 tid; 2792 2793 tid = le64_to_cpu(hdr->tid); 2794 mutex_lock(&osdc->request_mutex); 2795 req = __lookup_request(osdc, tid); 2796 if (!req) { 2797 *skip = 1; 2798 m = NULL; 2799 dout("get_reply unknown tid %llu from osd%d\n", tid, 2800 osd->o_osd); 2801 goto out; 2802 } 2803 2804 if (req->r_reply->con) 2805 dout("%s revoking msg %p from old con %p\n", __func__, 2806 req->r_reply, req->r_reply->con); 2807 ceph_msg_revoke_incoming(req->r_reply); 2808 2809 if (front_len > req->r_reply->front_alloc_len) { 2810 pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n", 2811 front_len, req->r_reply->front_alloc_len, 2812 (unsigned int)con->peer_name.type, 2813 le64_to_cpu(con->peer_name.num)); 2814 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 2815 false); 2816 if (!m) 2817 goto out; 2818 ceph_msg_put(req->r_reply); 2819 req->r_reply = m; 2820 } 2821 m = ceph_msg_get(req->r_reply); 2822 2823 if (data_len > 0) { 2824 struct ceph_osd_data *osd_data; 2825 2826 /* 2827 * XXX This is assuming there is only one op containing 2828 * XXX page data. Probably OK for reads, but this 2829 * XXX ought to be done more generally. 2830 */ 2831 osd_data = osd_req_op_extent_osd_data(req, 0); 2832 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 2833 if (osd_data->pages && 2834 unlikely(osd_data->length < data_len)) { 2835 2836 pr_warning("tid %lld reply has %d bytes " 2837 "we had only %llu bytes ready\n", 2838 tid, data_len, osd_data->length); 2839 *skip = 1; 2840 ceph_msg_put(m); 2841 m = NULL; 2842 goto out; 2843 } 2844 } 2845 } 2846 *skip = 0; 2847 dout("get_reply tid %lld %p\n", tid, m); 2848 2849 out: 2850 mutex_unlock(&osdc->request_mutex); 2851 return m; 2852 2853 } 2854 2855 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 2856 struct ceph_msg_header *hdr, 2857 int *skip) 2858 { 2859 struct ceph_osd *osd = con->private; 2860 int type = le16_to_cpu(hdr->type); 2861 int front = le32_to_cpu(hdr->front_len); 2862 2863 *skip = 0; 2864 switch (type) { 2865 case CEPH_MSG_OSD_MAP: 2866 case CEPH_MSG_WATCH_NOTIFY: 2867 return ceph_msg_new(type, front, GFP_NOFS, false); 2868 case CEPH_MSG_OSD_OPREPLY: 2869 return get_reply(con, hdr, skip); 2870 default: 2871 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, 2872 osd->o_osd); 2873 *skip = 1; 2874 return NULL; 2875 } 2876 } 2877 2878 /* 2879 * Wrappers to refcount containing ceph_osd struct 2880 */ 2881 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 2882 { 2883 struct ceph_osd *osd = con->private; 2884 if (get_osd(osd)) 2885 return con; 2886 return NULL; 2887 } 2888 2889 static void put_osd_con(struct ceph_connection *con) 2890 { 2891 struct ceph_osd *osd = con->private; 2892 put_osd(osd); 2893 } 2894 2895 /* 2896 * authentication 2897 */ 2898 /* 2899 * Note: returned pointer is the address of a structure that's 2900 * managed separately. Caller must *not* attempt to free it. 2901 */ 2902 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 2903 int *proto, int force_new) 2904 { 2905 struct ceph_osd *o = con->private; 2906 struct ceph_osd_client *osdc = o->o_osdc; 2907 struct ceph_auth_client *ac = osdc->client->monc.auth; 2908 struct ceph_auth_handshake *auth = &o->o_auth; 2909 2910 if (force_new && auth->authorizer) { 2911 ceph_auth_destroy_authorizer(ac, auth->authorizer); 2912 auth->authorizer = NULL; 2913 } 2914 if (!auth->authorizer) { 2915 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2916 auth); 2917 if (ret) 2918 return ERR_PTR(ret); 2919 } else { 2920 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2921 auth); 2922 if (ret) 2923 return ERR_PTR(ret); 2924 } 2925 *proto = ac->protocol; 2926 2927 return auth; 2928 } 2929 2930 2931 static int verify_authorizer_reply(struct ceph_connection *con, int len) 2932 { 2933 struct ceph_osd *o = con->private; 2934 struct ceph_osd_client *osdc = o->o_osdc; 2935 struct ceph_auth_client *ac = osdc->client->monc.auth; 2936 2937 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); 2938 } 2939 2940 static int invalidate_authorizer(struct ceph_connection *con) 2941 { 2942 struct ceph_osd *o = con->private; 2943 struct ceph_osd_client *osdc = o->o_osdc; 2944 struct ceph_auth_client *ac = osdc->client->monc.auth; 2945 2946 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 2947 return ceph_monc_validate_auth(&osdc->client->monc); 2948 } 2949 2950 static const struct ceph_connection_operations osd_con_ops = { 2951 .get = get_osd_con, 2952 .put = put_osd_con, 2953 .dispatch = dispatch, 2954 .get_authorizer = get_authorizer, 2955 .verify_authorizer_reply = verify_authorizer_reply, 2956 .invalidate_authorizer = invalidate_authorizer, 2957 .alloc_msg = alloc_msg, 2958 .fault = osd_reset, 2959 }; 2960