1 2 #include <linux/ceph/ceph_debug.h> 3 4 #include <linux/module.h> 5 #include <linux/err.h> 6 #include <linux/highmem.h> 7 #include <linux/mm.h> 8 #include <linux/pagemap.h> 9 #include <linux/slab.h> 10 #include <linux/uaccess.h> 11 #ifdef CONFIG_BLOCK 12 #include <linux/bio.h> 13 #endif 14 15 #include <linux/ceph/libceph.h> 16 #include <linux/ceph/osd_client.h> 17 #include <linux/ceph/messenger.h> 18 #include <linux/ceph/decode.h> 19 #include <linux/ceph/auth.h> 20 #include <linux/ceph/pagelist.h> 21 22 #define OSD_OP_FRONT_LEN 4096 23 #define OSD_OPREPLY_FRONT_LEN 512 24 25 static struct kmem_cache *ceph_osd_request_cache; 26 27 static const struct ceph_connection_operations osd_con_ops; 28 29 static void __send_queued(struct ceph_osd_client *osdc); 30 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd); 31 static void __register_request(struct ceph_osd_client *osdc, 32 struct ceph_osd_request *req); 33 static void __unregister_request(struct ceph_osd_client *osdc, 34 struct ceph_osd_request *req); 35 static void __unregister_linger_request(struct ceph_osd_client *osdc, 36 struct ceph_osd_request *req); 37 static void __enqueue_request(struct ceph_osd_request *req); 38 static void __send_request(struct ceph_osd_client *osdc, 39 struct ceph_osd_request *req); 40 41 /* 42 * Implement client access to distributed object storage cluster. 43 * 44 * All data objects are stored within a cluster/cloud of OSDs, or 45 * "object storage devices." (Note that Ceph OSDs have _nothing_ to 46 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply 47 * remote daemons serving up and coordinating consistent and safe 48 * access to storage. 49 * 50 * Cluster membership and the mapping of data objects onto storage devices 51 * are described by the osd map. 52 * 53 * We keep track of pending OSD requests (read, write), resubmit 54 * requests to different OSDs when the cluster topology/data layout 55 * change, or retry the affected requests when the communications 56 * channel with an OSD is reset. 57 */ 58 59 /* 60 * calculate the mapping of a file extent onto an object, and fill out the 61 * request accordingly. shorten extent as necessary if it crosses an 62 * object boundary. 63 * 64 * fill osd op in request message. 65 */ 66 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, 67 u64 *objnum, u64 *objoff, u64 *objlen) 68 { 69 u64 orig_len = *plen; 70 int r; 71 72 /* object extent? */ 73 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum, 74 objoff, objlen); 75 if (r < 0) 76 return r; 77 if (*objlen < orig_len) { 78 *plen = *objlen; 79 dout(" skipping last %llu, final file extent %llu~%llu\n", 80 orig_len - *plen, off, *plen); 81 } 82 83 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); 84 85 return 0; 86 } 87 88 static void ceph_osd_data_init(struct ceph_osd_data *osd_data) 89 { 90 memset(osd_data, 0, sizeof (*osd_data)); 91 osd_data->type = CEPH_OSD_DATA_TYPE_NONE; 92 } 93 94 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data, 95 struct page **pages, u64 length, u32 alignment, 96 bool pages_from_pool, bool own_pages) 97 { 98 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; 99 osd_data->pages = pages; 100 osd_data->length = length; 101 osd_data->alignment = alignment; 102 osd_data->pages_from_pool = pages_from_pool; 103 osd_data->own_pages = own_pages; 104 } 105 106 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, 107 struct ceph_pagelist *pagelist) 108 { 109 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST; 110 osd_data->pagelist = pagelist; 111 } 112 113 #ifdef CONFIG_BLOCK 114 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, 115 struct bio *bio, size_t bio_length) 116 { 117 osd_data->type = CEPH_OSD_DATA_TYPE_BIO; 118 osd_data->bio = bio; 119 osd_data->bio_length = bio_length; 120 } 121 #endif /* CONFIG_BLOCK */ 122 123 #define osd_req_op_data(oreq, whch, typ, fld) \ 124 ({ \ 125 BUG_ON(whch >= (oreq)->r_num_ops); \ 126 &(oreq)->r_ops[whch].typ.fld; \ 127 }) 128 129 static struct ceph_osd_data * 130 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) 131 { 132 BUG_ON(which >= osd_req->r_num_ops); 133 134 return &osd_req->r_ops[which].raw_data_in; 135 } 136 137 struct ceph_osd_data * 138 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, 139 unsigned int which) 140 { 141 return osd_req_op_data(osd_req, which, extent, osd_data); 142 } 143 EXPORT_SYMBOL(osd_req_op_extent_osd_data); 144 145 struct ceph_osd_data * 146 osd_req_op_cls_response_data(struct ceph_osd_request *osd_req, 147 unsigned int which) 148 { 149 return osd_req_op_data(osd_req, which, cls, response_data); 150 } 151 EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */ 152 153 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, 154 unsigned int which, struct page **pages, 155 u64 length, u32 alignment, 156 bool pages_from_pool, bool own_pages) 157 { 158 struct ceph_osd_data *osd_data; 159 160 osd_data = osd_req_op_raw_data_in(osd_req, which); 161 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 162 pages_from_pool, own_pages); 163 } 164 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); 165 166 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, 167 unsigned int which, struct page **pages, 168 u64 length, u32 alignment, 169 bool pages_from_pool, bool own_pages) 170 { 171 struct ceph_osd_data *osd_data; 172 173 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 174 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 175 pages_from_pool, own_pages); 176 } 177 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); 178 179 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, 180 unsigned int which, struct ceph_pagelist *pagelist) 181 { 182 struct ceph_osd_data *osd_data; 183 184 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 185 ceph_osd_data_pagelist_init(osd_data, pagelist); 186 } 187 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); 188 189 #ifdef CONFIG_BLOCK 190 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 191 unsigned int which, struct bio *bio, size_t bio_length) 192 { 193 struct ceph_osd_data *osd_data; 194 195 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 196 ceph_osd_data_bio_init(osd_data, bio, bio_length); 197 } 198 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); 199 #endif /* CONFIG_BLOCK */ 200 201 static void osd_req_op_cls_request_info_pagelist( 202 struct ceph_osd_request *osd_req, 203 unsigned int which, struct ceph_pagelist *pagelist) 204 { 205 struct ceph_osd_data *osd_data; 206 207 osd_data = osd_req_op_data(osd_req, which, cls, request_info); 208 ceph_osd_data_pagelist_init(osd_data, pagelist); 209 } 210 211 void osd_req_op_cls_request_data_pagelist( 212 struct ceph_osd_request *osd_req, 213 unsigned int which, struct ceph_pagelist *pagelist) 214 { 215 struct ceph_osd_data *osd_data; 216 217 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 218 ceph_osd_data_pagelist_init(osd_data, pagelist); 219 } 220 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); 221 222 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, 223 unsigned int which, struct page **pages, u64 length, 224 u32 alignment, bool pages_from_pool, bool own_pages) 225 { 226 struct ceph_osd_data *osd_data; 227 228 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 229 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 230 pages_from_pool, own_pages); 231 } 232 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); 233 234 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, 235 unsigned int which, struct page **pages, u64 length, 236 u32 alignment, bool pages_from_pool, bool own_pages) 237 { 238 struct ceph_osd_data *osd_data; 239 240 osd_data = osd_req_op_data(osd_req, which, cls, response_data); 241 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 242 pages_from_pool, own_pages); 243 } 244 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); 245 246 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) 247 { 248 switch (osd_data->type) { 249 case CEPH_OSD_DATA_TYPE_NONE: 250 return 0; 251 case CEPH_OSD_DATA_TYPE_PAGES: 252 return osd_data->length; 253 case CEPH_OSD_DATA_TYPE_PAGELIST: 254 return (u64)osd_data->pagelist->length; 255 #ifdef CONFIG_BLOCK 256 case CEPH_OSD_DATA_TYPE_BIO: 257 return (u64)osd_data->bio_length; 258 #endif /* CONFIG_BLOCK */ 259 default: 260 WARN(true, "unrecognized data type %d\n", (int)osd_data->type); 261 return 0; 262 } 263 } 264 265 static void ceph_osd_data_release(struct ceph_osd_data *osd_data) 266 { 267 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { 268 int num_pages; 269 270 num_pages = calc_pages_for((u64)osd_data->alignment, 271 (u64)osd_data->length); 272 ceph_release_page_vector(osd_data->pages, num_pages); 273 } 274 ceph_osd_data_init(osd_data); 275 } 276 277 static void osd_req_op_data_release(struct ceph_osd_request *osd_req, 278 unsigned int which) 279 { 280 struct ceph_osd_req_op *op; 281 282 BUG_ON(which >= osd_req->r_num_ops); 283 op = &osd_req->r_ops[which]; 284 285 switch (op->op) { 286 case CEPH_OSD_OP_READ: 287 case CEPH_OSD_OP_WRITE: 288 ceph_osd_data_release(&op->extent.osd_data); 289 break; 290 case CEPH_OSD_OP_CALL: 291 ceph_osd_data_release(&op->cls.request_info); 292 ceph_osd_data_release(&op->cls.request_data); 293 ceph_osd_data_release(&op->cls.response_data); 294 break; 295 case CEPH_OSD_OP_SETXATTR: 296 case CEPH_OSD_OP_CMPXATTR: 297 ceph_osd_data_release(&op->xattr.osd_data); 298 break; 299 default: 300 break; 301 } 302 } 303 304 /* 305 * requests 306 */ 307 static void ceph_osdc_release_request(struct kref *kref) 308 { 309 struct ceph_osd_request *req = container_of(kref, 310 struct ceph_osd_request, r_kref); 311 unsigned int which; 312 313 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 314 req->r_request, req->r_reply); 315 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 316 WARN_ON(!list_empty(&req->r_req_lru_item)); 317 WARN_ON(!list_empty(&req->r_osd_item)); 318 WARN_ON(!list_empty(&req->r_linger_item)); 319 WARN_ON(!list_empty(&req->r_linger_osd_item)); 320 WARN_ON(req->r_osd); 321 322 if (req->r_request) 323 ceph_msg_put(req->r_request); 324 if (req->r_reply) { 325 ceph_msg_revoke_incoming(req->r_reply); 326 ceph_msg_put(req->r_reply); 327 } 328 329 for (which = 0; which < req->r_num_ops; which++) 330 osd_req_op_data_release(req, which); 331 332 ceph_put_snap_context(req->r_snapc); 333 if (req->r_mempool) 334 mempool_free(req, req->r_osdc->req_mempool); 335 else 336 kmem_cache_free(ceph_osd_request_cache, req); 337 338 } 339 340 void ceph_osdc_get_request(struct ceph_osd_request *req) 341 { 342 dout("%s %p (was %d)\n", __func__, req, 343 atomic_read(&req->r_kref.refcount)); 344 kref_get(&req->r_kref); 345 } 346 EXPORT_SYMBOL(ceph_osdc_get_request); 347 348 void ceph_osdc_put_request(struct ceph_osd_request *req) 349 { 350 dout("%s %p (was %d)\n", __func__, req, 351 atomic_read(&req->r_kref.refcount)); 352 kref_put(&req->r_kref, ceph_osdc_release_request); 353 } 354 EXPORT_SYMBOL(ceph_osdc_put_request); 355 356 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 357 struct ceph_snap_context *snapc, 358 unsigned int num_ops, 359 bool use_mempool, 360 gfp_t gfp_flags) 361 { 362 struct ceph_osd_request *req; 363 struct ceph_msg *msg; 364 size_t msg_size; 365 366 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX); 367 BUG_ON(num_ops > CEPH_OSD_MAX_OP); 368 369 msg_size = 4 + 4 + 8 + 8 + 4+8; 370 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */ 371 msg_size += 1 + 8 + 4 + 4; /* pg_t */ 372 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */ 373 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op); 374 msg_size += 8; /* snapid */ 375 msg_size += 8; /* snap_seq */ 376 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */ 377 msg_size += 4; 378 379 if (use_mempool) { 380 req = mempool_alloc(osdc->req_mempool, gfp_flags); 381 memset(req, 0, sizeof(*req)); 382 } else { 383 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags); 384 } 385 if (req == NULL) 386 return NULL; 387 388 req->r_osdc = osdc; 389 req->r_mempool = use_mempool; 390 req->r_num_ops = num_ops; 391 392 kref_init(&req->r_kref); 393 init_completion(&req->r_completion); 394 init_completion(&req->r_safe_completion); 395 RB_CLEAR_NODE(&req->r_node); 396 INIT_LIST_HEAD(&req->r_unsafe_item); 397 INIT_LIST_HEAD(&req->r_linger_item); 398 INIT_LIST_HEAD(&req->r_linger_osd_item); 399 INIT_LIST_HEAD(&req->r_req_lru_item); 400 INIT_LIST_HEAD(&req->r_osd_item); 401 402 req->r_base_oloc.pool = -1; 403 req->r_target_oloc.pool = -1; 404 405 /* create reply message */ 406 if (use_mempool) 407 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 408 else 409 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, 410 OSD_OPREPLY_FRONT_LEN, gfp_flags, true); 411 if (!msg) { 412 ceph_osdc_put_request(req); 413 return NULL; 414 } 415 req->r_reply = msg; 416 417 /* create request message; allow space for oid */ 418 if (use_mempool) 419 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 420 else 421 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true); 422 if (!msg) { 423 ceph_osdc_put_request(req); 424 return NULL; 425 } 426 427 memset(msg->front.iov_base, 0, msg->front.iov_len); 428 429 req->r_request = msg; 430 431 return req; 432 } 433 EXPORT_SYMBOL(ceph_osdc_alloc_request); 434 435 static bool osd_req_opcode_valid(u16 opcode) 436 { 437 switch (opcode) { 438 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 439 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 440 #undef GENERATE_CASE 441 default: 442 return false; 443 } 444 } 445 446 /* 447 * This is an osd op init function for opcodes that have no data or 448 * other information associated with them. It also serves as a 449 * common init routine for all the other init functions, below. 450 */ 451 static struct ceph_osd_req_op * 452 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 453 u16 opcode) 454 { 455 struct ceph_osd_req_op *op; 456 457 BUG_ON(which >= osd_req->r_num_ops); 458 BUG_ON(!osd_req_opcode_valid(opcode)); 459 460 op = &osd_req->r_ops[which]; 461 memset(op, 0, sizeof (*op)); 462 op->op = opcode; 463 464 return op; 465 } 466 467 void osd_req_op_init(struct ceph_osd_request *osd_req, 468 unsigned int which, u16 opcode) 469 { 470 (void)_osd_req_op_init(osd_req, which, opcode); 471 } 472 EXPORT_SYMBOL(osd_req_op_init); 473 474 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 475 unsigned int which, u16 opcode, 476 u64 offset, u64 length, 477 u64 truncate_size, u32 truncate_seq) 478 { 479 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode); 480 size_t payload_len = 0; 481 482 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 483 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE); 484 485 op->extent.offset = offset; 486 op->extent.length = length; 487 op->extent.truncate_size = truncate_size; 488 op->extent.truncate_seq = truncate_seq; 489 if (opcode == CEPH_OSD_OP_WRITE) 490 payload_len += length; 491 492 op->payload_len = payload_len; 493 } 494 EXPORT_SYMBOL(osd_req_op_extent_init); 495 496 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 497 unsigned int which, u64 length) 498 { 499 struct ceph_osd_req_op *op; 500 u64 previous; 501 502 BUG_ON(which >= osd_req->r_num_ops); 503 op = &osd_req->r_ops[which]; 504 previous = op->extent.length; 505 506 if (length == previous) 507 return; /* Nothing to do */ 508 BUG_ON(length > previous); 509 510 op->extent.length = length; 511 op->payload_len -= previous - length; 512 } 513 EXPORT_SYMBOL(osd_req_op_extent_update); 514 515 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 516 u16 opcode, const char *class, const char *method) 517 { 518 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode); 519 struct ceph_pagelist *pagelist; 520 size_t payload_len = 0; 521 size_t size; 522 523 BUG_ON(opcode != CEPH_OSD_OP_CALL); 524 525 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 526 BUG_ON(!pagelist); 527 ceph_pagelist_init(pagelist); 528 529 op->cls.class_name = class; 530 size = strlen(class); 531 BUG_ON(size > (size_t) U8_MAX); 532 op->cls.class_len = size; 533 ceph_pagelist_append(pagelist, class, size); 534 payload_len += size; 535 536 op->cls.method_name = method; 537 size = strlen(method); 538 BUG_ON(size > (size_t) U8_MAX); 539 op->cls.method_len = size; 540 ceph_pagelist_append(pagelist, method, size); 541 payload_len += size; 542 543 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 544 545 op->cls.argc = 0; /* currently unused */ 546 547 op->payload_len = payload_len; 548 } 549 EXPORT_SYMBOL(osd_req_op_cls_init); 550 551 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 552 u16 opcode, const char *name, const void *value, 553 size_t size, u8 cmp_op, u8 cmp_mode) 554 { 555 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode); 556 struct ceph_pagelist *pagelist; 557 size_t payload_len; 558 559 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 560 561 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 562 if (!pagelist) 563 return -ENOMEM; 564 565 ceph_pagelist_init(pagelist); 566 567 payload_len = strlen(name); 568 op->xattr.name_len = payload_len; 569 ceph_pagelist_append(pagelist, name, payload_len); 570 571 op->xattr.value_len = size; 572 ceph_pagelist_append(pagelist, value, size); 573 payload_len += size; 574 575 op->xattr.cmp_op = cmp_op; 576 op->xattr.cmp_mode = cmp_mode; 577 578 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 579 op->payload_len = payload_len; 580 return 0; 581 } 582 EXPORT_SYMBOL(osd_req_op_xattr_init); 583 584 void osd_req_op_watch_init(struct ceph_osd_request *osd_req, 585 unsigned int which, u16 opcode, 586 u64 cookie, u64 version, int flag) 587 { 588 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode); 589 590 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH); 591 592 op->watch.cookie = cookie; 593 op->watch.ver = version; 594 if (opcode == CEPH_OSD_OP_WATCH && flag) 595 op->watch.flag = (u8)1; 596 } 597 EXPORT_SYMBOL(osd_req_op_watch_init); 598 599 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 600 unsigned int which, 601 u64 expected_object_size, 602 u64 expected_write_size) 603 { 604 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 605 CEPH_OSD_OP_SETALLOCHINT); 606 607 op->alloc_hint.expected_object_size = expected_object_size; 608 op->alloc_hint.expected_write_size = expected_write_size; 609 610 /* 611 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 612 * not worth a feature bit. Set FAILOK per-op flag to make 613 * sure older osds don't trip over an unsupported opcode. 614 */ 615 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 616 } 617 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 618 619 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 620 struct ceph_osd_data *osd_data) 621 { 622 u64 length = ceph_osd_data_length(osd_data); 623 624 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 625 BUG_ON(length > (u64) SIZE_MAX); 626 if (length) 627 ceph_msg_data_add_pages(msg, osd_data->pages, 628 length, osd_data->alignment); 629 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 630 BUG_ON(!length); 631 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 632 #ifdef CONFIG_BLOCK 633 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 634 ceph_msg_data_add_bio(msg, osd_data->bio, length); 635 #endif 636 } else { 637 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 638 } 639 } 640 641 static u64 osd_req_encode_op(struct ceph_osd_request *req, 642 struct ceph_osd_op *dst, unsigned int which) 643 { 644 struct ceph_osd_req_op *src; 645 struct ceph_osd_data *osd_data; 646 u64 request_data_len = 0; 647 u64 data_length; 648 649 BUG_ON(which >= req->r_num_ops); 650 src = &req->r_ops[which]; 651 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 652 pr_err("unrecognized osd opcode %d\n", src->op); 653 654 return 0; 655 } 656 657 switch (src->op) { 658 case CEPH_OSD_OP_STAT: 659 osd_data = &src->raw_data_in; 660 ceph_osdc_msg_data_add(req->r_reply, osd_data); 661 break; 662 case CEPH_OSD_OP_READ: 663 case CEPH_OSD_OP_WRITE: 664 case CEPH_OSD_OP_ZERO: 665 case CEPH_OSD_OP_TRUNCATE: 666 if (src->op == CEPH_OSD_OP_WRITE) 667 request_data_len = src->extent.length; 668 dst->extent.offset = cpu_to_le64(src->extent.offset); 669 dst->extent.length = cpu_to_le64(src->extent.length); 670 dst->extent.truncate_size = 671 cpu_to_le64(src->extent.truncate_size); 672 dst->extent.truncate_seq = 673 cpu_to_le32(src->extent.truncate_seq); 674 osd_data = &src->extent.osd_data; 675 if (src->op == CEPH_OSD_OP_WRITE) 676 ceph_osdc_msg_data_add(req->r_request, osd_data); 677 else 678 ceph_osdc_msg_data_add(req->r_reply, osd_data); 679 break; 680 case CEPH_OSD_OP_CALL: 681 dst->cls.class_len = src->cls.class_len; 682 dst->cls.method_len = src->cls.method_len; 683 osd_data = &src->cls.request_info; 684 ceph_osdc_msg_data_add(req->r_request, osd_data); 685 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST); 686 request_data_len = osd_data->pagelist->length; 687 688 osd_data = &src->cls.request_data; 689 data_length = ceph_osd_data_length(osd_data); 690 if (data_length) { 691 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE); 692 dst->cls.indata_len = cpu_to_le32(data_length); 693 ceph_osdc_msg_data_add(req->r_request, osd_data); 694 src->payload_len += data_length; 695 request_data_len += data_length; 696 } 697 osd_data = &src->cls.response_data; 698 ceph_osdc_msg_data_add(req->r_reply, osd_data); 699 break; 700 case CEPH_OSD_OP_STARTSYNC: 701 break; 702 case CEPH_OSD_OP_NOTIFY_ACK: 703 case CEPH_OSD_OP_WATCH: 704 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 705 dst->watch.ver = cpu_to_le64(src->watch.ver); 706 dst->watch.flag = src->watch.flag; 707 break; 708 case CEPH_OSD_OP_SETALLOCHINT: 709 dst->alloc_hint.expected_object_size = 710 cpu_to_le64(src->alloc_hint.expected_object_size); 711 dst->alloc_hint.expected_write_size = 712 cpu_to_le64(src->alloc_hint.expected_write_size); 713 break; 714 case CEPH_OSD_OP_SETXATTR: 715 case CEPH_OSD_OP_CMPXATTR: 716 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 717 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 718 dst->xattr.cmp_op = src->xattr.cmp_op; 719 dst->xattr.cmp_mode = src->xattr.cmp_mode; 720 osd_data = &src->xattr.osd_data; 721 ceph_osdc_msg_data_add(req->r_request, osd_data); 722 request_data_len = osd_data->pagelist->length; 723 break; 724 case CEPH_OSD_OP_CREATE: 725 case CEPH_OSD_OP_DELETE: 726 break; 727 default: 728 pr_err("unsupported osd opcode %s\n", 729 ceph_osd_op_name(src->op)); 730 WARN_ON(1); 731 732 return 0; 733 } 734 735 dst->op = cpu_to_le16(src->op); 736 dst->flags = cpu_to_le32(src->flags); 737 dst->payload_len = cpu_to_le32(src->payload_len); 738 739 return request_data_len; 740 } 741 742 /* 743 * build new request AND message, calculate layout, and adjust file 744 * extent as needed. 745 * 746 * if the file was recently truncated, we include information about its 747 * old and new size so that the object can be updated appropriately. (we 748 * avoid synchronously deleting truncated objects because it's slow.) 749 * 750 * if @do_sync, include a 'startsync' command so that the osd will flush 751 * data quickly. 752 */ 753 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 754 struct ceph_file_layout *layout, 755 struct ceph_vino vino, 756 u64 off, u64 *plen, 757 unsigned int which, int num_ops, 758 int opcode, int flags, 759 struct ceph_snap_context *snapc, 760 u32 truncate_seq, 761 u64 truncate_size, 762 bool use_mempool) 763 { 764 struct ceph_osd_request *req; 765 u64 objnum = 0; 766 u64 objoff = 0; 767 u64 objlen = 0; 768 int r; 769 770 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 771 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 772 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 773 774 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 775 GFP_NOFS); 776 if (!req) 777 return ERR_PTR(-ENOMEM); 778 779 req->r_flags = flags; 780 781 /* calculate max write size */ 782 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 783 if (r < 0) { 784 ceph_osdc_put_request(req); 785 return ERR_PTR(r); 786 } 787 788 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 789 osd_req_op_init(req, which, opcode); 790 } else { 791 u32 object_size = le32_to_cpu(layout->fl_object_size); 792 u32 object_base = off - objoff; 793 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 794 if (truncate_size <= object_base) { 795 truncate_size = 0; 796 } else { 797 truncate_size -= object_base; 798 if (truncate_size > object_size) 799 truncate_size = object_size; 800 } 801 } 802 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 803 truncate_size, truncate_seq); 804 } 805 806 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout); 807 808 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name), 809 "%llx.%08llx", vino.ino, objnum); 810 req->r_base_oid.name_len = strlen(req->r_base_oid.name); 811 812 return req; 813 } 814 EXPORT_SYMBOL(ceph_osdc_new_request); 815 816 /* 817 * We keep osd requests in an rbtree, sorted by ->r_tid. 818 */ 819 static void __insert_request(struct ceph_osd_client *osdc, 820 struct ceph_osd_request *new) 821 { 822 struct rb_node **p = &osdc->requests.rb_node; 823 struct rb_node *parent = NULL; 824 struct ceph_osd_request *req = NULL; 825 826 while (*p) { 827 parent = *p; 828 req = rb_entry(parent, struct ceph_osd_request, r_node); 829 if (new->r_tid < req->r_tid) 830 p = &(*p)->rb_left; 831 else if (new->r_tid > req->r_tid) 832 p = &(*p)->rb_right; 833 else 834 BUG(); 835 } 836 837 rb_link_node(&new->r_node, parent, p); 838 rb_insert_color(&new->r_node, &osdc->requests); 839 } 840 841 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, 842 u64 tid) 843 { 844 struct ceph_osd_request *req; 845 struct rb_node *n = osdc->requests.rb_node; 846 847 while (n) { 848 req = rb_entry(n, struct ceph_osd_request, r_node); 849 if (tid < req->r_tid) 850 n = n->rb_left; 851 else if (tid > req->r_tid) 852 n = n->rb_right; 853 else 854 return req; 855 } 856 return NULL; 857 } 858 859 static struct ceph_osd_request * 860 __lookup_request_ge(struct ceph_osd_client *osdc, 861 u64 tid) 862 { 863 struct ceph_osd_request *req; 864 struct rb_node *n = osdc->requests.rb_node; 865 866 while (n) { 867 req = rb_entry(n, struct ceph_osd_request, r_node); 868 if (tid < req->r_tid) { 869 if (!n->rb_left) 870 return req; 871 n = n->rb_left; 872 } else if (tid > req->r_tid) { 873 n = n->rb_right; 874 } else { 875 return req; 876 } 877 } 878 return NULL; 879 } 880 881 static void __kick_linger_request(struct ceph_osd_request *req) 882 { 883 struct ceph_osd_client *osdc = req->r_osdc; 884 struct ceph_osd *osd = req->r_osd; 885 886 /* 887 * Linger requests need to be resent with a new tid to avoid 888 * the dup op detection logic on the OSDs. Achieve this with 889 * a re-register dance instead of open-coding. 890 */ 891 ceph_osdc_get_request(req); 892 if (!list_empty(&req->r_linger_item)) 893 __unregister_linger_request(osdc, req); 894 else 895 __unregister_request(osdc, req); 896 __register_request(osdc, req); 897 ceph_osdc_put_request(req); 898 899 /* 900 * Unless request has been registered as both normal and 901 * lingering, __unregister{,_linger}_request clears r_osd. 902 * However, here we need to preserve r_osd to make sure we 903 * requeue on the same OSD. 904 */ 905 WARN_ON(req->r_osd || !osd); 906 req->r_osd = osd; 907 908 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid); 909 __enqueue_request(req); 910 } 911 912 /* 913 * Resubmit requests pending on the given osd. 914 */ 915 static void __kick_osd_requests(struct ceph_osd_client *osdc, 916 struct ceph_osd *osd) 917 { 918 struct ceph_osd_request *req, *nreq; 919 LIST_HEAD(resend); 920 LIST_HEAD(resend_linger); 921 int err; 922 923 dout("%s osd%d\n", __func__, osd->o_osd); 924 err = __reset_osd(osdc, osd); 925 if (err) 926 return; 927 928 /* 929 * Build up a list of requests to resend by traversing the 930 * osd's list of requests. Requests for a given object are 931 * sent in tid order, and that is also the order they're 932 * kept on this list. Therefore all requests that are in 933 * flight will be found first, followed by all requests that 934 * have not yet been sent. And to resend requests while 935 * preserving this order we will want to put any sent 936 * requests back on the front of the osd client's unsent 937 * list. 938 * 939 * So we build a separate ordered list of already-sent 940 * requests for the affected osd and splice it onto the 941 * front of the osd client's unsent list. Once we've seen a 942 * request that has not yet been sent we're done. Those 943 * requests are already sitting right where they belong. 944 */ 945 list_for_each_entry(req, &osd->o_requests, r_osd_item) { 946 if (!req->r_sent) 947 break; 948 949 if (!req->r_linger) { 950 dout("%s requeueing %p tid %llu\n", __func__, req, 951 req->r_tid); 952 list_move_tail(&req->r_req_lru_item, &resend); 953 req->r_flags |= CEPH_OSD_FLAG_RETRY; 954 } else { 955 list_move_tail(&req->r_req_lru_item, &resend_linger); 956 } 957 } 958 list_splice(&resend, &osdc->req_unsent); 959 960 /* 961 * Both registered and not yet registered linger requests are 962 * enqueued with a new tid on the same OSD. We add/move them 963 * to req_unsent/o_requests at the end to keep things in tid 964 * order. 965 */ 966 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, 967 r_linger_osd_item) { 968 WARN_ON(!list_empty(&req->r_req_lru_item)); 969 __kick_linger_request(req); 970 } 971 972 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item) 973 __kick_linger_request(req); 974 } 975 976 /* 977 * If the osd connection drops, we need to resubmit all requests. 978 */ 979 static void osd_reset(struct ceph_connection *con) 980 { 981 struct ceph_osd *osd = con->private; 982 struct ceph_osd_client *osdc; 983 984 if (!osd) 985 return; 986 dout("osd_reset osd%d\n", osd->o_osd); 987 osdc = osd->o_osdc; 988 down_read(&osdc->map_sem); 989 mutex_lock(&osdc->request_mutex); 990 __kick_osd_requests(osdc, osd); 991 __send_queued(osdc); 992 mutex_unlock(&osdc->request_mutex); 993 up_read(&osdc->map_sem); 994 } 995 996 /* 997 * Track open sessions with osds. 998 */ 999 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1000 { 1001 struct ceph_osd *osd; 1002 1003 osd = kzalloc(sizeof(*osd), GFP_NOFS); 1004 if (!osd) 1005 return NULL; 1006 1007 atomic_set(&osd->o_ref, 1); 1008 osd->o_osdc = osdc; 1009 osd->o_osd = onum; 1010 RB_CLEAR_NODE(&osd->o_node); 1011 INIT_LIST_HEAD(&osd->o_requests); 1012 INIT_LIST_HEAD(&osd->o_linger_requests); 1013 INIT_LIST_HEAD(&osd->o_osd_lru); 1014 osd->o_incarnation = 1; 1015 1016 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1017 1018 INIT_LIST_HEAD(&osd->o_keepalive_item); 1019 return osd; 1020 } 1021 1022 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1023 { 1024 if (atomic_inc_not_zero(&osd->o_ref)) { 1025 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, 1026 atomic_read(&osd->o_ref)); 1027 return osd; 1028 } else { 1029 dout("get_osd %p FAIL\n", osd); 1030 return NULL; 1031 } 1032 } 1033 1034 static void put_osd(struct ceph_osd *osd) 1035 { 1036 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), 1037 atomic_read(&osd->o_ref) - 1); 1038 if (atomic_dec_and_test(&osd->o_ref)) { 1039 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; 1040 1041 if (osd->o_auth.authorizer) 1042 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer); 1043 kfree(osd); 1044 } 1045 } 1046 1047 /* 1048 * remove an osd from our map 1049 */ 1050 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1051 { 1052 dout("%s %p osd%d\n", __func__, osd, osd->o_osd); 1053 WARN_ON(!list_empty(&osd->o_requests)); 1054 WARN_ON(!list_empty(&osd->o_linger_requests)); 1055 1056 list_del_init(&osd->o_osd_lru); 1057 rb_erase(&osd->o_node, &osdc->osds); 1058 RB_CLEAR_NODE(&osd->o_node); 1059 } 1060 1061 static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1062 { 1063 dout("%s %p osd%d\n", __func__, osd, osd->o_osd); 1064 1065 if (!RB_EMPTY_NODE(&osd->o_node)) { 1066 ceph_con_close(&osd->o_con); 1067 __remove_osd(osdc, osd); 1068 put_osd(osd); 1069 } 1070 } 1071 1072 static void remove_all_osds(struct ceph_osd_client *osdc) 1073 { 1074 dout("%s %p\n", __func__, osdc); 1075 mutex_lock(&osdc->request_mutex); 1076 while (!RB_EMPTY_ROOT(&osdc->osds)) { 1077 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 1078 struct ceph_osd, o_node); 1079 remove_osd(osdc, osd); 1080 } 1081 mutex_unlock(&osdc->request_mutex); 1082 } 1083 1084 static void __move_osd_to_lru(struct ceph_osd_client *osdc, 1085 struct ceph_osd *osd) 1086 { 1087 dout("%s %p\n", __func__, osd); 1088 BUG_ON(!list_empty(&osd->o_osd_lru)); 1089 1090 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1091 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; 1092 } 1093 1094 static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc, 1095 struct ceph_osd *osd) 1096 { 1097 dout("%s %p\n", __func__, osd); 1098 1099 if (list_empty(&osd->o_requests) && 1100 list_empty(&osd->o_linger_requests)) 1101 __move_osd_to_lru(osdc, osd); 1102 } 1103 1104 static void __remove_osd_from_lru(struct ceph_osd *osd) 1105 { 1106 dout("__remove_osd_from_lru %p\n", osd); 1107 if (!list_empty(&osd->o_osd_lru)) 1108 list_del_init(&osd->o_osd_lru); 1109 } 1110 1111 static void remove_old_osds(struct ceph_osd_client *osdc) 1112 { 1113 struct ceph_osd *osd, *nosd; 1114 1115 dout("__remove_old_osds %p\n", osdc); 1116 mutex_lock(&osdc->request_mutex); 1117 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 1118 if (time_before(jiffies, osd->lru_ttl)) 1119 break; 1120 remove_osd(osdc, osd); 1121 } 1122 mutex_unlock(&osdc->request_mutex); 1123 } 1124 1125 /* 1126 * reset osd connect 1127 */ 1128 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1129 { 1130 struct ceph_entity_addr *peer_addr; 1131 1132 dout("__reset_osd %p osd%d\n", osd, osd->o_osd); 1133 if (list_empty(&osd->o_requests) && 1134 list_empty(&osd->o_linger_requests)) { 1135 remove_osd(osdc, osd); 1136 return -ENODEV; 1137 } 1138 1139 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd]; 1140 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1141 !ceph_con_opened(&osd->o_con)) { 1142 struct ceph_osd_request *req; 1143 1144 dout("osd addr hasn't changed and connection never opened, " 1145 "letting msgr retry\n"); 1146 /* touch each r_stamp for handle_timeout()'s benfit */ 1147 list_for_each_entry(req, &osd->o_requests, r_osd_item) 1148 req->r_stamp = jiffies; 1149 1150 return -EAGAIN; 1151 } 1152 1153 ceph_con_close(&osd->o_con); 1154 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1155 osd->o_incarnation++; 1156 1157 return 0; 1158 } 1159 1160 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) 1161 { 1162 struct rb_node **p = &osdc->osds.rb_node; 1163 struct rb_node *parent = NULL; 1164 struct ceph_osd *osd = NULL; 1165 1166 dout("__insert_osd %p osd%d\n", new, new->o_osd); 1167 while (*p) { 1168 parent = *p; 1169 osd = rb_entry(parent, struct ceph_osd, o_node); 1170 if (new->o_osd < osd->o_osd) 1171 p = &(*p)->rb_left; 1172 else if (new->o_osd > osd->o_osd) 1173 p = &(*p)->rb_right; 1174 else 1175 BUG(); 1176 } 1177 1178 rb_link_node(&new->o_node, parent, p); 1179 rb_insert_color(&new->o_node, &osdc->osds); 1180 } 1181 1182 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) 1183 { 1184 struct ceph_osd *osd; 1185 struct rb_node *n = osdc->osds.rb_node; 1186 1187 while (n) { 1188 osd = rb_entry(n, struct ceph_osd, o_node); 1189 if (o < osd->o_osd) 1190 n = n->rb_left; 1191 else if (o > osd->o_osd) 1192 n = n->rb_right; 1193 else 1194 return osd; 1195 } 1196 return NULL; 1197 } 1198 1199 static void __schedule_osd_timeout(struct ceph_osd_client *osdc) 1200 { 1201 schedule_delayed_work(&osdc->timeout_work, 1202 osdc->client->options->osd_keepalive_timeout * HZ); 1203 } 1204 1205 static void __cancel_osd_timeout(struct ceph_osd_client *osdc) 1206 { 1207 cancel_delayed_work(&osdc->timeout_work); 1208 } 1209 1210 /* 1211 * Register request, assign tid. If this is the first request, set up 1212 * the timeout event. 1213 */ 1214 static void __register_request(struct ceph_osd_client *osdc, 1215 struct ceph_osd_request *req) 1216 { 1217 req->r_tid = ++osdc->last_tid; 1218 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 1219 dout("__register_request %p tid %lld\n", req, req->r_tid); 1220 __insert_request(osdc, req); 1221 ceph_osdc_get_request(req); 1222 osdc->num_requests++; 1223 if (osdc->num_requests == 1) { 1224 dout(" first request, scheduling timeout\n"); 1225 __schedule_osd_timeout(osdc); 1226 } 1227 } 1228 1229 /* 1230 * called under osdc->request_mutex 1231 */ 1232 static void __unregister_request(struct ceph_osd_client *osdc, 1233 struct ceph_osd_request *req) 1234 { 1235 if (RB_EMPTY_NODE(&req->r_node)) { 1236 dout("__unregister_request %p tid %lld not registered\n", 1237 req, req->r_tid); 1238 return; 1239 } 1240 1241 dout("__unregister_request %p tid %lld\n", req, req->r_tid); 1242 rb_erase(&req->r_node, &osdc->requests); 1243 RB_CLEAR_NODE(&req->r_node); 1244 osdc->num_requests--; 1245 1246 if (req->r_osd) { 1247 /* make sure the original request isn't in flight. */ 1248 ceph_msg_revoke(req->r_request); 1249 1250 list_del_init(&req->r_osd_item); 1251 maybe_move_osd_to_lru(osdc, req->r_osd); 1252 if (list_empty(&req->r_linger_osd_item)) 1253 req->r_osd = NULL; 1254 } 1255 1256 list_del_init(&req->r_req_lru_item); 1257 ceph_osdc_put_request(req); 1258 1259 if (osdc->num_requests == 0) { 1260 dout(" no requests, canceling timeout\n"); 1261 __cancel_osd_timeout(osdc); 1262 } 1263 } 1264 1265 /* 1266 * Cancel a previously queued request message 1267 */ 1268 static void __cancel_request(struct ceph_osd_request *req) 1269 { 1270 if (req->r_sent && req->r_osd) { 1271 ceph_msg_revoke(req->r_request); 1272 req->r_sent = 0; 1273 } 1274 } 1275 1276 static void __register_linger_request(struct ceph_osd_client *osdc, 1277 struct ceph_osd_request *req) 1278 { 1279 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 1280 WARN_ON(!req->r_linger); 1281 1282 ceph_osdc_get_request(req); 1283 list_add_tail(&req->r_linger_item, &osdc->req_linger); 1284 if (req->r_osd) 1285 list_add_tail(&req->r_linger_osd_item, 1286 &req->r_osd->o_linger_requests); 1287 } 1288 1289 static void __unregister_linger_request(struct ceph_osd_client *osdc, 1290 struct ceph_osd_request *req) 1291 { 1292 WARN_ON(!req->r_linger); 1293 1294 if (list_empty(&req->r_linger_item)) { 1295 dout("%s %p tid %llu not registered\n", __func__, req, 1296 req->r_tid); 1297 return; 1298 } 1299 1300 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 1301 list_del_init(&req->r_linger_item); 1302 1303 if (req->r_osd) { 1304 list_del_init(&req->r_linger_osd_item); 1305 maybe_move_osd_to_lru(osdc, req->r_osd); 1306 if (list_empty(&req->r_osd_item)) 1307 req->r_osd = NULL; 1308 } 1309 1310 list_del_init(&req->r_req_lru_item); /* can be on notarget */ 1311 ceph_osdc_put_request(req); 1312 } 1313 1314 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 1315 struct ceph_osd_request *req) 1316 { 1317 if (!req->r_linger) { 1318 dout("set_request_linger %p\n", req); 1319 req->r_linger = 1; 1320 } 1321 } 1322 EXPORT_SYMBOL(ceph_osdc_set_request_linger); 1323 1324 /* 1325 * Returns whether a request should be blocked from being sent 1326 * based on the current osdmap and osd_client settings. 1327 * 1328 * Caller should hold map_sem for read. 1329 */ 1330 static bool __req_should_be_paused(struct ceph_osd_client *osdc, 1331 struct ceph_osd_request *req) 1332 { 1333 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); 1334 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || 1335 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 1336 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) || 1337 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr); 1338 } 1339 1340 /* 1341 * Calculate mapping of a request to a PG. Takes tiering into account. 1342 */ 1343 static int __calc_request_pg(struct ceph_osdmap *osdmap, 1344 struct ceph_osd_request *req, 1345 struct ceph_pg *pg_out) 1346 { 1347 bool need_check_tiering; 1348 1349 need_check_tiering = false; 1350 if (req->r_target_oloc.pool == -1) { 1351 req->r_target_oloc = req->r_base_oloc; /* struct */ 1352 need_check_tiering = true; 1353 } 1354 if (req->r_target_oid.name_len == 0) { 1355 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid); 1356 need_check_tiering = true; 1357 } 1358 1359 if (need_check_tiering && 1360 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1361 struct ceph_pg_pool_info *pi; 1362 1363 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool); 1364 if (pi) { 1365 if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1366 pi->read_tier >= 0) 1367 req->r_target_oloc.pool = pi->read_tier; 1368 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1369 pi->write_tier >= 0) 1370 req->r_target_oloc.pool = pi->write_tier; 1371 } 1372 /* !pi is caught in ceph_oloc_oid_to_pg() */ 1373 } 1374 1375 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc, 1376 &req->r_target_oid, pg_out); 1377 } 1378 1379 static void __enqueue_request(struct ceph_osd_request *req) 1380 { 1381 struct ceph_osd_client *osdc = req->r_osdc; 1382 1383 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid, 1384 req->r_osd ? req->r_osd->o_osd : -1); 1385 1386 if (req->r_osd) { 1387 __remove_osd_from_lru(req->r_osd); 1388 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); 1389 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent); 1390 } else { 1391 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget); 1392 } 1393 } 1394 1395 /* 1396 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct 1397 * (as needed), and set the request r_osd appropriately. If there is 1398 * no up osd, set r_osd to NULL. Move the request to the appropriate list 1399 * (unsent, homeless) or leave on in-flight lru. 1400 * 1401 * Return 0 if unchanged, 1 if changed, or negative on error. 1402 * 1403 * Caller should hold map_sem for read and request_mutex. 1404 */ 1405 static int __map_request(struct ceph_osd_client *osdc, 1406 struct ceph_osd_request *req, int force_resend) 1407 { 1408 struct ceph_pg pgid; 1409 int acting[CEPH_PG_MAX_SIZE]; 1410 int num, o; 1411 int err; 1412 bool was_paused; 1413 1414 dout("map_request %p tid %lld\n", req, req->r_tid); 1415 1416 err = __calc_request_pg(osdc->osdmap, req, &pgid); 1417 if (err) { 1418 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1419 return err; 1420 } 1421 req->r_pgid = pgid; 1422 1423 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o); 1424 if (num < 0) 1425 num = 0; 1426 1427 was_paused = req->r_paused; 1428 req->r_paused = __req_should_be_paused(osdc, req); 1429 if (was_paused && !req->r_paused) 1430 force_resend = 1; 1431 1432 if ((!force_resend && 1433 req->r_osd && req->r_osd->o_osd == o && 1434 req->r_sent >= req->r_osd->o_incarnation && 1435 req->r_num_pg_osds == num && 1436 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || 1437 (req->r_osd == NULL && o == -1) || 1438 req->r_paused) 1439 return 0; /* no change */ 1440 1441 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n", 1442 req->r_tid, pgid.pool, pgid.seed, o, 1443 req->r_osd ? req->r_osd->o_osd : -1); 1444 1445 /* record full pg acting set */ 1446 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); 1447 req->r_num_pg_osds = num; 1448 1449 if (req->r_osd) { 1450 __cancel_request(req); 1451 list_del_init(&req->r_osd_item); 1452 list_del_init(&req->r_linger_osd_item); 1453 req->r_osd = NULL; 1454 } 1455 1456 req->r_osd = __lookup_osd(osdc, o); 1457 if (!req->r_osd && o >= 0) { 1458 err = -ENOMEM; 1459 req->r_osd = create_osd(osdc, o); 1460 if (!req->r_osd) { 1461 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1462 goto out; 1463 } 1464 1465 dout("map_request osd %p is osd%d\n", req->r_osd, o); 1466 __insert_osd(osdc, req->r_osd); 1467 1468 ceph_con_open(&req->r_osd->o_con, 1469 CEPH_ENTITY_TYPE_OSD, o, 1470 &osdc->osdmap->osd_addr[o]); 1471 } 1472 1473 __enqueue_request(req); 1474 err = 1; /* osd or pg changed */ 1475 1476 out: 1477 return err; 1478 } 1479 1480 /* 1481 * caller should hold map_sem (for read) and request_mutex 1482 */ 1483 static void __send_request(struct ceph_osd_client *osdc, 1484 struct ceph_osd_request *req) 1485 { 1486 void *p; 1487 1488 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n", 1489 req, req->r_tid, req->r_osd->o_osd, req->r_flags, 1490 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed); 1491 1492 /* fill in message content that changes each time we send it */ 1493 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch); 1494 put_unaligned_le32(req->r_flags, req->r_request_flags); 1495 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool); 1496 p = req->r_request_pgid; 1497 ceph_encode_64(&p, req->r_pgid.pool); 1498 ceph_encode_32(&p, req->r_pgid.seed); 1499 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */ 1500 memcpy(req->r_request_reassert_version, &req->r_reassert_version, 1501 sizeof(req->r_reassert_version)); 1502 1503 req->r_stamp = jiffies; 1504 list_move_tail(&req->r_req_lru_item, &osdc->req_lru); 1505 1506 ceph_msg_get(req->r_request); /* send consumes a ref */ 1507 1508 req->r_sent = req->r_osd->o_incarnation; 1509 1510 ceph_con_send(&req->r_osd->o_con, req->r_request); 1511 } 1512 1513 /* 1514 * Send any requests in the queue (req_unsent). 1515 */ 1516 static void __send_queued(struct ceph_osd_client *osdc) 1517 { 1518 struct ceph_osd_request *req, *tmp; 1519 1520 dout("__send_queued\n"); 1521 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) 1522 __send_request(osdc, req); 1523 } 1524 1525 /* 1526 * Caller should hold map_sem for read and request_mutex. 1527 */ 1528 static int __ceph_osdc_start_request(struct ceph_osd_client *osdc, 1529 struct ceph_osd_request *req, 1530 bool nofail) 1531 { 1532 int rc; 1533 1534 __register_request(osdc, req); 1535 req->r_sent = 0; 1536 req->r_got_reply = 0; 1537 rc = __map_request(osdc, req, 0); 1538 if (rc < 0) { 1539 if (nofail) { 1540 dout("osdc_start_request failed map, " 1541 " will retry %lld\n", req->r_tid); 1542 rc = 0; 1543 } else { 1544 __unregister_request(osdc, req); 1545 } 1546 return rc; 1547 } 1548 1549 if (req->r_osd == NULL) { 1550 dout("send_request %p no up osds in pg\n", req); 1551 ceph_monc_request_next_osdmap(&osdc->client->monc); 1552 } else { 1553 __send_queued(osdc); 1554 } 1555 1556 return 0; 1557 } 1558 1559 /* 1560 * Timeout callback, called every N seconds when 1 or more osd 1561 * requests has been active for more than N seconds. When this 1562 * happens, we ping all OSDs with requests who have timed out to 1563 * ensure any communications channel reset is detected. Reset the 1564 * request timeouts another N seconds in the future as we go. 1565 * Reschedule the timeout event another N seconds in future (unless 1566 * there are no open requests). 1567 */ 1568 static void handle_timeout(struct work_struct *work) 1569 { 1570 struct ceph_osd_client *osdc = 1571 container_of(work, struct ceph_osd_client, timeout_work.work); 1572 struct ceph_osd_request *req; 1573 struct ceph_osd *osd; 1574 unsigned long keepalive = 1575 osdc->client->options->osd_keepalive_timeout * HZ; 1576 struct list_head slow_osds; 1577 dout("timeout\n"); 1578 down_read(&osdc->map_sem); 1579 1580 ceph_monc_request_next_osdmap(&osdc->client->monc); 1581 1582 mutex_lock(&osdc->request_mutex); 1583 1584 /* 1585 * ping osds that are a bit slow. this ensures that if there 1586 * is a break in the TCP connection we will notice, and reopen 1587 * a connection with that osd (from the fault callback). 1588 */ 1589 INIT_LIST_HEAD(&slow_osds); 1590 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { 1591 if (time_before(jiffies, req->r_stamp + keepalive)) 1592 break; 1593 1594 osd = req->r_osd; 1595 BUG_ON(!osd); 1596 dout(" tid %llu is slow, will send keepalive on osd%d\n", 1597 req->r_tid, osd->o_osd); 1598 list_move_tail(&osd->o_keepalive_item, &slow_osds); 1599 } 1600 while (!list_empty(&slow_osds)) { 1601 osd = list_entry(slow_osds.next, struct ceph_osd, 1602 o_keepalive_item); 1603 list_del_init(&osd->o_keepalive_item); 1604 ceph_con_keepalive(&osd->o_con); 1605 } 1606 1607 __schedule_osd_timeout(osdc); 1608 __send_queued(osdc); 1609 mutex_unlock(&osdc->request_mutex); 1610 up_read(&osdc->map_sem); 1611 } 1612 1613 static void handle_osds_timeout(struct work_struct *work) 1614 { 1615 struct ceph_osd_client *osdc = 1616 container_of(work, struct ceph_osd_client, 1617 osds_timeout_work.work); 1618 unsigned long delay = 1619 osdc->client->options->osd_idle_ttl * HZ >> 2; 1620 1621 dout("osds timeout\n"); 1622 down_read(&osdc->map_sem); 1623 remove_old_osds(osdc); 1624 up_read(&osdc->map_sem); 1625 1626 schedule_delayed_work(&osdc->osds_timeout_work, 1627 round_jiffies_relative(delay)); 1628 } 1629 1630 static int ceph_oloc_decode(void **p, void *end, 1631 struct ceph_object_locator *oloc) 1632 { 1633 u8 struct_v, struct_cv; 1634 u32 len; 1635 void *struct_end; 1636 int ret = 0; 1637 1638 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1639 struct_v = ceph_decode_8(p); 1640 struct_cv = ceph_decode_8(p); 1641 if (struct_v < 3) { 1642 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 1643 struct_v, struct_cv); 1644 goto e_inval; 1645 } 1646 if (struct_cv > 6) { 1647 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 1648 struct_v, struct_cv); 1649 goto e_inval; 1650 } 1651 len = ceph_decode_32(p); 1652 ceph_decode_need(p, end, len, e_inval); 1653 struct_end = *p + len; 1654 1655 oloc->pool = ceph_decode_64(p); 1656 *p += 4; /* skip preferred */ 1657 1658 len = ceph_decode_32(p); 1659 if (len > 0) { 1660 pr_warn("ceph_object_locator::key is set\n"); 1661 goto e_inval; 1662 } 1663 1664 if (struct_v >= 5) { 1665 len = ceph_decode_32(p); 1666 if (len > 0) { 1667 pr_warn("ceph_object_locator::nspace is set\n"); 1668 goto e_inval; 1669 } 1670 } 1671 1672 if (struct_v >= 6) { 1673 s64 hash = ceph_decode_64(p); 1674 if (hash != -1) { 1675 pr_warn("ceph_object_locator::hash is set\n"); 1676 goto e_inval; 1677 } 1678 } 1679 1680 /* skip the rest */ 1681 *p = struct_end; 1682 out: 1683 return ret; 1684 1685 e_inval: 1686 ret = -EINVAL; 1687 goto out; 1688 } 1689 1690 static int ceph_redirect_decode(void **p, void *end, 1691 struct ceph_request_redirect *redir) 1692 { 1693 u8 struct_v, struct_cv; 1694 u32 len; 1695 void *struct_end; 1696 int ret; 1697 1698 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1699 struct_v = ceph_decode_8(p); 1700 struct_cv = ceph_decode_8(p); 1701 if (struct_cv > 1) { 1702 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 1703 struct_v, struct_cv); 1704 goto e_inval; 1705 } 1706 len = ceph_decode_32(p); 1707 ceph_decode_need(p, end, len, e_inval); 1708 struct_end = *p + len; 1709 1710 ret = ceph_oloc_decode(p, end, &redir->oloc); 1711 if (ret) 1712 goto out; 1713 1714 len = ceph_decode_32(p); 1715 if (len > 0) { 1716 pr_warn("ceph_request_redirect::object_name is set\n"); 1717 goto e_inval; 1718 } 1719 1720 len = ceph_decode_32(p); 1721 *p += len; /* skip osd_instructions */ 1722 1723 /* skip the rest */ 1724 *p = struct_end; 1725 out: 1726 return ret; 1727 1728 e_inval: 1729 ret = -EINVAL; 1730 goto out; 1731 } 1732 1733 static void complete_request(struct ceph_osd_request *req) 1734 { 1735 complete_all(&req->r_safe_completion); /* fsync waiter */ 1736 } 1737 1738 /* 1739 * handle osd op reply. either call the callback if it is specified, 1740 * or do the completion to wake up the waiting thread. 1741 */ 1742 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, 1743 struct ceph_connection *con) 1744 { 1745 void *p, *end; 1746 struct ceph_osd_request *req; 1747 struct ceph_request_redirect redir; 1748 u64 tid; 1749 int object_len; 1750 unsigned int numops; 1751 int payload_len, flags; 1752 s32 result; 1753 s32 retry_attempt; 1754 struct ceph_pg pg; 1755 int err; 1756 u32 reassert_epoch; 1757 u64 reassert_version; 1758 u32 osdmap_epoch; 1759 int already_completed; 1760 u32 bytes; 1761 unsigned int i; 1762 1763 tid = le64_to_cpu(msg->hdr.tid); 1764 dout("handle_reply %p tid %llu\n", msg, tid); 1765 1766 p = msg->front.iov_base; 1767 end = p + msg->front.iov_len; 1768 1769 ceph_decode_need(&p, end, 4, bad); 1770 object_len = ceph_decode_32(&p); 1771 ceph_decode_need(&p, end, object_len, bad); 1772 p += object_len; 1773 1774 err = ceph_decode_pgid(&p, end, &pg); 1775 if (err) 1776 goto bad; 1777 1778 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad); 1779 flags = ceph_decode_64(&p); 1780 result = ceph_decode_32(&p); 1781 reassert_epoch = ceph_decode_32(&p); 1782 reassert_version = ceph_decode_64(&p); 1783 osdmap_epoch = ceph_decode_32(&p); 1784 1785 /* lookup */ 1786 down_read(&osdc->map_sem); 1787 mutex_lock(&osdc->request_mutex); 1788 req = __lookup_request(osdc, tid); 1789 if (req == NULL) { 1790 dout("handle_reply tid %llu dne\n", tid); 1791 goto bad_mutex; 1792 } 1793 ceph_osdc_get_request(req); 1794 1795 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid, 1796 req, result); 1797 1798 ceph_decode_need(&p, end, 4, bad_put); 1799 numops = ceph_decode_32(&p); 1800 if (numops > CEPH_OSD_MAX_OP) 1801 goto bad_put; 1802 if (numops != req->r_num_ops) 1803 goto bad_put; 1804 payload_len = 0; 1805 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put); 1806 for (i = 0; i < numops; i++) { 1807 struct ceph_osd_op *op = p; 1808 int len; 1809 1810 len = le32_to_cpu(op->payload_len); 1811 req->r_reply_op_len[i] = len; 1812 dout(" op %d has %d bytes\n", i, len); 1813 payload_len += len; 1814 p += sizeof(*op); 1815 } 1816 bytes = le32_to_cpu(msg->hdr.data_len); 1817 if (payload_len != bytes) { 1818 pr_warn("sum of op payload lens %d != data_len %d\n", 1819 payload_len, bytes); 1820 goto bad_put; 1821 } 1822 1823 ceph_decode_need(&p, end, 4 + numops * 4, bad_put); 1824 retry_attempt = ceph_decode_32(&p); 1825 for (i = 0; i < numops; i++) 1826 req->r_reply_op_result[i] = ceph_decode_32(&p); 1827 1828 if (le16_to_cpu(msg->hdr.version) >= 6) { 1829 p += 8 + 4; /* skip replay_version */ 1830 p += 8; /* skip user_version */ 1831 1832 err = ceph_redirect_decode(&p, end, &redir); 1833 if (err) 1834 goto bad_put; 1835 } else { 1836 redir.oloc.pool = -1; 1837 } 1838 1839 if (redir.oloc.pool != -1) { 1840 dout("redirect pool %lld\n", redir.oloc.pool); 1841 1842 __unregister_request(osdc, req); 1843 1844 req->r_target_oloc = redir.oloc; /* struct */ 1845 1846 /* 1847 * Start redirect requests with nofail=true. If 1848 * mapping fails, request will end up on the notarget 1849 * list, waiting for the new osdmap (which can take 1850 * a while), even though the original request mapped 1851 * successfully. In the future we might want to follow 1852 * original request's nofail setting here. 1853 */ 1854 err = __ceph_osdc_start_request(osdc, req, true); 1855 BUG_ON(err); 1856 1857 goto out_unlock; 1858 } 1859 1860 already_completed = req->r_got_reply; 1861 if (!req->r_got_reply) { 1862 req->r_result = result; 1863 dout("handle_reply result %d bytes %d\n", req->r_result, 1864 bytes); 1865 if (req->r_result == 0) 1866 req->r_result = bytes; 1867 1868 /* in case this is a write and we need to replay, */ 1869 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch); 1870 req->r_reassert_version.version = cpu_to_le64(reassert_version); 1871 1872 req->r_got_reply = 1; 1873 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { 1874 dout("handle_reply tid %llu dup ack\n", tid); 1875 goto out_unlock; 1876 } 1877 1878 dout("handle_reply tid %llu flags %d\n", tid, flags); 1879 1880 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) 1881 __register_linger_request(osdc, req); 1882 1883 /* either this is a read, or we got the safe response */ 1884 if (result < 0 || 1885 (flags & CEPH_OSD_FLAG_ONDISK) || 1886 ((flags & CEPH_OSD_FLAG_WRITE) == 0)) 1887 __unregister_request(osdc, req); 1888 1889 mutex_unlock(&osdc->request_mutex); 1890 up_read(&osdc->map_sem); 1891 1892 if (!already_completed) { 1893 if (req->r_unsafe_callback && 1894 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK)) 1895 req->r_unsafe_callback(req, true); 1896 if (req->r_callback) 1897 req->r_callback(req, msg); 1898 else 1899 complete_all(&req->r_completion); 1900 } 1901 1902 if (flags & CEPH_OSD_FLAG_ONDISK) { 1903 if (req->r_unsafe_callback && already_completed) 1904 req->r_unsafe_callback(req, false); 1905 complete_request(req); 1906 } 1907 1908 out: 1909 dout("req=%p req->r_linger=%d\n", req, req->r_linger); 1910 ceph_osdc_put_request(req); 1911 return; 1912 out_unlock: 1913 mutex_unlock(&osdc->request_mutex); 1914 up_read(&osdc->map_sem); 1915 goto out; 1916 1917 bad_put: 1918 req->r_result = -EIO; 1919 __unregister_request(osdc, req); 1920 if (req->r_callback) 1921 req->r_callback(req, msg); 1922 else 1923 complete_all(&req->r_completion); 1924 complete_request(req); 1925 ceph_osdc_put_request(req); 1926 bad_mutex: 1927 mutex_unlock(&osdc->request_mutex); 1928 up_read(&osdc->map_sem); 1929 bad: 1930 pr_err("corrupt osd_op_reply got %d %d\n", 1931 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len)); 1932 ceph_msg_dump(msg); 1933 } 1934 1935 static void reset_changed_osds(struct ceph_osd_client *osdc) 1936 { 1937 struct rb_node *p, *n; 1938 1939 dout("%s %p\n", __func__, osdc); 1940 for (p = rb_first(&osdc->osds); p; p = n) { 1941 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); 1942 1943 n = rb_next(p); 1944 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 1945 memcmp(&osd->o_con.peer_addr, 1946 ceph_osd_addr(osdc->osdmap, 1947 osd->o_osd), 1948 sizeof(struct ceph_entity_addr)) != 0) 1949 __reset_osd(osdc, osd); 1950 } 1951 } 1952 1953 /* 1954 * Requeue requests whose mapping to an OSD has changed. If requests map to 1955 * no osd, request a new map. 1956 * 1957 * Caller should hold map_sem for read. 1958 */ 1959 static void kick_requests(struct ceph_osd_client *osdc, bool force_resend, 1960 bool force_resend_writes) 1961 { 1962 struct ceph_osd_request *req, *nreq; 1963 struct rb_node *p; 1964 int needmap = 0; 1965 int err; 1966 bool force_resend_req; 1967 1968 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "", 1969 force_resend_writes ? " (force resend writes)" : ""); 1970 mutex_lock(&osdc->request_mutex); 1971 for (p = rb_first(&osdc->requests); p; ) { 1972 req = rb_entry(p, struct ceph_osd_request, r_node); 1973 p = rb_next(p); 1974 1975 /* 1976 * For linger requests that have not yet been 1977 * registered, move them to the linger list; they'll 1978 * be sent to the osd in the loop below. Unregister 1979 * the request before re-registering it as a linger 1980 * request to ensure the __map_request() below 1981 * will decide it needs to be sent. 1982 */ 1983 if (req->r_linger && list_empty(&req->r_linger_item)) { 1984 dout("%p tid %llu restart on osd%d\n", 1985 req, req->r_tid, 1986 req->r_osd ? req->r_osd->o_osd : -1); 1987 ceph_osdc_get_request(req); 1988 __unregister_request(osdc, req); 1989 __register_linger_request(osdc, req); 1990 ceph_osdc_put_request(req); 1991 continue; 1992 } 1993 1994 force_resend_req = force_resend || 1995 (force_resend_writes && 1996 req->r_flags & CEPH_OSD_FLAG_WRITE); 1997 err = __map_request(osdc, req, force_resend_req); 1998 if (err < 0) 1999 continue; /* error */ 2000 if (req->r_osd == NULL) { 2001 dout("%p tid %llu maps to no osd\n", req, req->r_tid); 2002 needmap++; /* request a newer map */ 2003 } else if (err > 0) { 2004 if (!req->r_linger) { 2005 dout("%p tid %llu requeued on osd%d\n", req, 2006 req->r_tid, 2007 req->r_osd ? req->r_osd->o_osd : -1); 2008 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2009 } 2010 } 2011 } 2012 2013 list_for_each_entry_safe(req, nreq, &osdc->req_linger, 2014 r_linger_item) { 2015 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); 2016 2017 err = __map_request(osdc, req, 2018 force_resend || force_resend_writes); 2019 dout("__map_request returned %d\n", err); 2020 if (err == 0) 2021 continue; /* no change and no osd was specified */ 2022 if (err < 0) 2023 continue; /* hrm! */ 2024 if (req->r_osd == NULL) { 2025 dout("tid %llu maps to no valid osd\n", req->r_tid); 2026 needmap++; /* request a newer map */ 2027 continue; 2028 } 2029 2030 dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid, 2031 req->r_osd ? req->r_osd->o_osd : -1); 2032 __register_request(osdc, req); 2033 __unregister_linger_request(osdc, req); 2034 } 2035 reset_changed_osds(osdc); 2036 mutex_unlock(&osdc->request_mutex); 2037 2038 if (needmap) { 2039 dout("%d requests for down osds, need new map\n", needmap); 2040 ceph_monc_request_next_osdmap(&osdc->client->monc); 2041 } 2042 } 2043 2044 2045 /* 2046 * Process updated osd map. 2047 * 2048 * The message contains any number of incremental and full maps, normally 2049 * indicating some sort of topology change in the cluster. Kick requests 2050 * off to different OSDs as needed. 2051 */ 2052 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 2053 { 2054 void *p, *end, *next; 2055 u32 nr_maps, maplen; 2056 u32 epoch; 2057 struct ceph_osdmap *newmap = NULL, *oldmap; 2058 int err; 2059 struct ceph_fsid fsid; 2060 bool was_full; 2061 2062 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); 2063 p = msg->front.iov_base; 2064 end = p + msg->front.iov_len; 2065 2066 /* verify fsid */ 2067 ceph_decode_need(&p, end, sizeof(fsid), bad); 2068 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 2069 if (ceph_check_fsid(osdc->client, &fsid) < 0) 2070 return; 2071 2072 down_write(&osdc->map_sem); 2073 2074 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 2075 2076 /* incremental maps */ 2077 ceph_decode_32_safe(&p, end, nr_maps, bad); 2078 dout(" %d inc maps\n", nr_maps); 2079 while (nr_maps > 0) { 2080 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2081 epoch = ceph_decode_32(&p); 2082 maplen = ceph_decode_32(&p); 2083 ceph_decode_need(&p, end, maplen, bad); 2084 next = p + maplen; 2085 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { 2086 dout("applying incremental map %u len %d\n", 2087 epoch, maplen); 2088 newmap = osdmap_apply_incremental(&p, next, 2089 osdc->osdmap, 2090 &osdc->client->msgr); 2091 if (IS_ERR(newmap)) { 2092 err = PTR_ERR(newmap); 2093 goto bad; 2094 } 2095 BUG_ON(!newmap); 2096 if (newmap != osdc->osdmap) { 2097 ceph_osdmap_destroy(osdc->osdmap); 2098 osdc->osdmap = newmap; 2099 } 2100 was_full = was_full || 2101 ceph_osdmap_flag(osdc->osdmap, 2102 CEPH_OSDMAP_FULL); 2103 kick_requests(osdc, 0, was_full); 2104 } else { 2105 dout("ignoring incremental map %u len %d\n", 2106 epoch, maplen); 2107 } 2108 p = next; 2109 nr_maps--; 2110 } 2111 if (newmap) 2112 goto done; 2113 2114 /* full maps */ 2115 ceph_decode_32_safe(&p, end, nr_maps, bad); 2116 dout(" %d full maps\n", nr_maps); 2117 while (nr_maps) { 2118 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2119 epoch = ceph_decode_32(&p); 2120 maplen = ceph_decode_32(&p); 2121 ceph_decode_need(&p, end, maplen, bad); 2122 if (nr_maps > 1) { 2123 dout("skipping non-latest full map %u len %d\n", 2124 epoch, maplen); 2125 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { 2126 dout("skipping full map %u len %d, " 2127 "older than our %u\n", epoch, maplen, 2128 osdc->osdmap->epoch); 2129 } else { 2130 int skipped_map = 0; 2131 2132 dout("taking full map %u len %d\n", epoch, maplen); 2133 newmap = ceph_osdmap_decode(&p, p+maplen); 2134 if (IS_ERR(newmap)) { 2135 err = PTR_ERR(newmap); 2136 goto bad; 2137 } 2138 BUG_ON(!newmap); 2139 oldmap = osdc->osdmap; 2140 osdc->osdmap = newmap; 2141 if (oldmap) { 2142 if (oldmap->epoch + 1 < newmap->epoch) 2143 skipped_map = 1; 2144 ceph_osdmap_destroy(oldmap); 2145 } 2146 was_full = was_full || 2147 ceph_osdmap_flag(osdc->osdmap, 2148 CEPH_OSDMAP_FULL); 2149 kick_requests(osdc, skipped_map, was_full); 2150 } 2151 p += maplen; 2152 nr_maps--; 2153 } 2154 2155 if (!osdc->osdmap) 2156 goto bad; 2157 done: 2158 downgrade_write(&osdc->map_sem); 2159 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); 2160 2161 /* 2162 * subscribe to subsequent osdmap updates if full to ensure 2163 * we find out when we are no longer full and stop returning 2164 * ENOSPC. 2165 */ 2166 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 2167 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) || 2168 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) 2169 ceph_monc_request_next_osdmap(&osdc->client->monc); 2170 2171 mutex_lock(&osdc->request_mutex); 2172 __send_queued(osdc); 2173 mutex_unlock(&osdc->request_mutex); 2174 up_read(&osdc->map_sem); 2175 wake_up_all(&osdc->client->auth_wq); 2176 return; 2177 2178 bad: 2179 pr_err("osdc handle_map corrupt msg\n"); 2180 ceph_msg_dump(msg); 2181 up_write(&osdc->map_sem); 2182 } 2183 2184 /* 2185 * watch/notify callback event infrastructure 2186 * 2187 * These callbacks are used both for watch and notify operations. 2188 */ 2189 static void __release_event(struct kref *kref) 2190 { 2191 struct ceph_osd_event *event = 2192 container_of(kref, struct ceph_osd_event, kref); 2193 2194 dout("__release_event %p\n", event); 2195 kfree(event); 2196 } 2197 2198 static void get_event(struct ceph_osd_event *event) 2199 { 2200 kref_get(&event->kref); 2201 } 2202 2203 void ceph_osdc_put_event(struct ceph_osd_event *event) 2204 { 2205 kref_put(&event->kref, __release_event); 2206 } 2207 EXPORT_SYMBOL(ceph_osdc_put_event); 2208 2209 static void __insert_event(struct ceph_osd_client *osdc, 2210 struct ceph_osd_event *new) 2211 { 2212 struct rb_node **p = &osdc->event_tree.rb_node; 2213 struct rb_node *parent = NULL; 2214 struct ceph_osd_event *event = NULL; 2215 2216 while (*p) { 2217 parent = *p; 2218 event = rb_entry(parent, struct ceph_osd_event, node); 2219 if (new->cookie < event->cookie) 2220 p = &(*p)->rb_left; 2221 else if (new->cookie > event->cookie) 2222 p = &(*p)->rb_right; 2223 else 2224 BUG(); 2225 } 2226 2227 rb_link_node(&new->node, parent, p); 2228 rb_insert_color(&new->node, &osdc->event_tree); 2229 } 2230 2231 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, 2232 u64 cookie) 2233 { 2234 struct rb_node **p = &osdc->event_tree.rb_node; 2235 struct rb_node *parent = NULL; 2236 struct ceph_osd_event *event = NULL; 2237 2238 while (*p) { 2239 parent = *p; 2240 event = rb_entry(parent, struct ceph_osd_event, node); 2241 if (cookie < event->cookie) 2242 p = &(*p)->rb_left; 2243 else if (cookie > event->cookie) 2244 p = &(*p)->rb_right; 2245 else 2246 return event; 2247 } 2248 return NULL; 2249 } 2250 2251 static void __remove_event(struct ceph_osd_event *event) 2252 { 2253 struct ceph_osd_client *osdc = event->osdc; 2254 2255 if (!RB_EMPTY_NODE(&event->node)) { 2256 dout("__remove_event removed %p\n", event); 2257 rb_erase(&event->node, &osdc->event_tree); 2258 ceph_osdc_put_event(event); 2259 } else { 2260 dout("__remove_event didn't remove %p\n", event); 2261 } 2262 } 2263 2264 int ceph_osdc_create_event(struct ceph_osd_client *osdc, 2265 void (*event_cb)(u64, u64, u8, void *), 2266 void *data, struct ceph_osd_event **pevent) 2267 { 2268 struct ceph_osd_event *event; 2269 2270 event = kmalloc(sizeof(*event), GFP_NOIO); 2271 if (!event) 2272 return -ENOMEM; 2273 2274 dout("create_event %p\n", event); 2275 event->cb = event_cb; 2276 event->one_shot = 0; 2277 event->data = data; 2278 event->osdc = osdc; 2279 INIT_LIST_HEAD(&event->osd_node); 2280 RB_CLEAR_NODE(&event->node); 2281 kref_init(&event->kref); /* one ref for us */ 2282 kref_get(&event->kref); /* one ref for the caller */ 2283 2284 spin_lock(&osdc->event_lock); 2285 event->cookie = ++osdc->event_count; 2286 __insert_event(osdc, event); 2287 spin_unlock(&osdc->event_lock); 2288 2289 *pevent = event; 2290 return 0; 2291 } 2292 EXPORT_SYMBOL(ceph_osdc_create_event); 2293 2294 void ceph_osdc_cancel_event(struct ceph_osd_event *event) 2295 { 2296 struct ceph_osd_client *osdc = event->osdc; 2297 2298 dout("cancel_event %p\n", event); 2299 spin_lock(&osdc->event_lock); 2300 __remove_event(event); 2301 spin_unlock(&osdc->event_lock); 2302 ceph_osdc_put_event(event); /* caller's */ 2303 } 2304 EXPORT_SYMBOL(ceph_osdc_cancel_event); 2305 2306 2307 static void do_event_work(struct work_struct *work) 2308 { 2309 struct ceph_osd_event_work *event_work = 2310 container_of(work, struct ceph_osd_event_work, work); 2311 struct ceph_osd_event *event = event_work->event; 2312 u64 ver = event_work->ver; 2313 u64 notify_id = event_work->notify_id; 2314 u8 opcode = event_work->opcode; 2315 2316 dout("do_event_work completing %p\n", event); 2317 event->cb(ver, notify_id, opcode, event->data); 2318 dout("do_event_work completed %p\n", event); 2319 ceph_osdc_put_event(event); 2320 kfree(event_work); 2321 } 2322 2323 2324 /* 2325 * Process osd watch notifications 2326 */ 2327 static void handle_watch_notify(struct ceph_osd_client *osdc, 2328 struct ceph_msg *msg) 2329 { 2330 void *p, *end; 2331 u8 proto_ver; 2332 u64 cookie, ver, notify_id; 2333 u8 opcode; 2334 struct ceph_osd_event *event; 2335 struct ceph_osd_event_work *event_work; 2336 2337 p = msg->front.iov_base; 2338 end = p + msg->front.iov_len; 2339 2340 ceph_decode_8_safe(&p, end, proto_ver, bad); 2341 ceph_decode_8_safe(&p, end, opcode, bad); 2342 ceph_decode_64_safe(&p, end, cookie, bad); 2343 ceph_decode_64_safe(&p, end, ver, bad); 2344 ceph_decode_64_safe(&p, end, notify_id, bad); 2345 2346 spin_lock(&osdc->event_lock); 2347 event = __find_event(osdc, cookie); 2348 if (event) { 2349 BUG_ON(event->one_shot); 2350 get_event(event); 2351 } 2352 spin_unlock(&osdc->event_lock); 2353 dout("handle_watch_notify cookie %lld ver %lld event %p\n", 2354 cookie, ver, event); 2355 if (event) { 2356 event_work = kmalloc(sizeof(*event_work), GFP_NOIO); 2357 if (!event_work) { 2358 pr_err("couldn't allocate event_work\n"); 2359 ceph_osdc_put_event(event); 2360 return; 2361 } 2362 INIT_WORK(&event_work->work, do_event_work); 2363 event_work->event = event; 2364 event_work->ver = ver; 2365 event_work->notify_id = notify_id; 2366 event_work->opcode = opcode; 2367 2368 queue_work(osdc->notify_wq, &event_work->work); 2369 } 2370 2371 return; 2372 2373 bad: 2374 pr_err("osdc handle_watch_notify corrupt msg\n"); 2375 } 2376 2377 /* 2378 * build new request AND message 2379 * 2380 */ 2381 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 2382 struct ceph_snap_context *snapc, u64 snap_id, 2383 struct timespec *mtime) 2384 { 2385 struct ceph_msg *msg = req->r_request; 2386 void *p; 2387 size_t msg_size; 2388 int flags = req->r_flags; 2389 u64 data_len; 2390 unsigned int i; 2391 2392 req->r_snapid = snap_id; 2393 req->r_snapc = ceph_get_snap_context(snapc); 2394 2395 /* encode request */ 2396 msg->hdr.version = cpu_to_le16(4); 2397 2398 p = msg->front.iov_base; 2399 ceph_encode_32(&p, 1); /* client_inc is always 1 */ 2400 req->r_request_osdmap_epoch = p; 2401 p += 4; 2402 req->r_request_flags = p; 2403 p += 4; 2404 if (req->r_flags & CEPH_OSD_FLAG_WRITE) 2405 ceph_encode_timespec(p, mtime); 2406 p += sizeof(struct ceph_timespec); 2407 req->r_request_reassert_version = p; 2408 p += sizeof(struct ceph_eversion); /* will get filled in */ 2409 2410 /* oloc */ 2411 ceph_encode_8(&p, 4); 2412 ceph_encode_8(&p, 4); 2413 ceph_encode_32(&p, 8 + 4 + 4); 2414 req->r_request_pool = p; 2415 p += 8; 2416 ceph_encode_32(&p, -1); /* preferred */ 2417 ceph_encode_32(&p, 0); /* key len */ 2418 2419 ceph_encode_8(&p, 1); 2420 req->r_request_pgid = p; 2421 p += 8 + 4; 2422 ceph_encode_32(&p, -1); /* preferred */ 2423 2424 /* oid */ 2425 ceph_encode_32(&p, req->r_base_oid.name_len); 2426 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len); 2427 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len, 2428 req->r_base_oid.name, req->r_base_oid.name_len); 2429 p += req->r_base_oid.name_len; 2430 2431 /* ops--can imply data */ 2432 ceph_encode_16(&p, (u16)req->r_num_ops); 2433 data_len = 0; 2434 for (i = 0; i < req->r_num_ops; i++) { 2435 data_len += osd_req_encode_op(req, p, i); 2436 p += sizeof(struct ceph_osd_op); 2437 } 2438 2439 /* snaps */ 2440 ceph_encode_64(&p, req->r_snapid); 2441 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0); 2442 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0); 2443 if (req->r_snapc) { 2444 for (i = 0; i < snapc->num_snaps; i++) { 2445 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2446 } 2447 } 2448 2449 req->r_request_attempts = p; 2450 p += 4; 2451 2452 /* data */ 2453 if (flags & CEPH_OSD_FLAG_WRITE) { 2454 u16 data_off; 2455 2456 /* 2457 * The header "data_off" is a hint to the receiver 2458 * allowing it to align received data into its 2459 * buffers such that there's no need to re-copy 2460 * it before writing it to disk (direct I/O). 2461 */ 2462 data_off = (u16) (off & 0xffff); 2463 req->r_request->hdr.data_off = cpu_to_le16(data_off); 2464 } 2465 req->r_request->hdr.data_len = cpu_to_le32(data_len); 2466 2467 BUG_ON(p > msg->front.iov_base + msg->front.iov_len); 2468 msg_size = p - msg->front.iov_base; 2469 msg->front.iov_len = msg_size; 2470 msg->hdr.front_len = cpu_to_le32(msg_size); 2471 2472 dout("build_request msg_size was %d\n", (int)msg_size); 2473 } 2474 EXPORT_SYMBOL(ceph_osdc_build_request); 2475 2476 /* 2477 * Register request, send initial attempt. 2478 */ 2479 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 2480 struct ceph_osd_request *req, 2481 bool nofail) 2482 { 2483 int rc; 2484 2485 down_read(&osdc->map_sem); 2486 mutex_lock(&osdc->request_mutex); 2487 2488 rc = __ceph_osdc_start_request(osdc, req, nofail); 2489 2490 mutex_unlock(&osdc->request_mutex); 2491 up_read(&osdc->map_sem); 2492 2493 return rc; 2494 } 2495 EXPORT_SYMBOL(ceph_osdc_start_request); 2496 2497 /* 2498 * Unregister a registered request. The request is not completed (i.e. 2499 * no callbacks or wakeups) - higher layers are supposed to know what 2500 * they are canceling. 2501 */ 2502 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 2503 { 2504 struct ceph_osd_client *osdc = req->r_osdc; 2505 2506 mutex_lock(&osdc->request_mutex); 2507 if (req->r_linger) 2508 __unregister_linger_request(osdc, req); 2509 __unregister_request(osdc, req); 2510 mutex_unlock(&osdc->request_mutex); 2511 2512 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid); 2513 } 2514 EXPORT_SYMBOL(ceph_osdc_cancel_request); 2515 2516 /* 2517 * wait for a request to complete 2518 */ 2519 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 2520 struct ceph_osd_request *req) 2521 { 2522 int rc; 2523 2524 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 2525 2526 rc = wait_for_completion_interruptible(&req->r_completion); 2527 if (rc < 0) { 2528 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid); 2529 ceph_osdc_cancel_request(req); 2530 complete_request(req); 2531 return rc; 2532 } 2533 2534 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid, 2535 req->r_result); 2536 return req->r_result; 2537 } 2538 EXPORT_SYMBOL(ceph_osdc_wait_request); 2539 2540 /* 2541 * sync - wait for all in-flight requests to flush. avoid starvation. 2542 */ 2543 void ceph_osdc_sync(struct ceph_osd_client *osdc) 2544 { 2545 struct ceph_osd_request *req; 2546 u64 last_tid, next_tid = 0; 2547 2548 mutex_lock(&osdc->request_mutex); 2549 last_tid = osdc->last_tid; 2550 while (1) { 2551 req = __lookup_request_ge(osdc, next_tid); 2552 if (!req) 2553 break; 2554 if (req->r_tid > last_tid) 2555 break; 2556 2557 next_tid = req->r_tid + 1; 2558 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) 2559 continue; 2560 2561 ceph_osdc_get_request(req); 2562 mutex_unlock(&osdc->request_mutex); 2563 dout("sync waiting on tid %llu (last is %llu)\n", 2564 req->r_tid, last_tid); 2565 wait_for_completion(&req->r_safe_completion); 2566 mutex_lock(&osdc->request_mutex); 2567 ceph_osdc_put_request(req); 2568 } 2569 mutex_unlock(&osdc->request_mutex); 2570 dout("sync done (thru tid %llu)\n", last_tid); 2571 } 2572 EXPORT_SYMBOL(ceph_osdc_sync); 2573 2574 /* 2575 * Call all pending notify callbacks - for use after a watch is 2576 * unregistered, to make sure no more callbacks for it will be invoked 2577 */ 2578 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 2579 { 2580 flush_workqueue(osdc->notify_wq); 2581 } 2582 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 2583 2584 2585 /* 2586 * init, shutdown 2587 */ 2588 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 2589 { 2590 int err; 2591 2592 dout("init\n"); 2593 osdc->client = client; 2594 osdc->osdmap = NULL; 2595 init_rwsem(&osdc->map_sem); 2596 init_completion(&osdc->map_waiters); 2597 osdc->last_requested_map = 0; 2598 mutex_init(&osdc->request_mutex); 2599 osdc->last_tid = 0; 2600 osdc->osds = RB_ROOT; 2601 INIT_LIST_HEAD(&osdc->osd_lru); 2602 osdc->requests = RB_ROOT; 2603 INIT_LIST_HEAD(&osdc->req_lru); 2604 INIT_LIST_HEAD(&osdc->req_unsent); 2605 INIT_LIST_HEAD(&osdc->req_notarget); 2606 INIT_LIST_HEAD(&osdc->req_linger); 2607 osdc->num_requests = 0; 2608 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 2609 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 2610 spin_lock_init(&osdc->event_lock); 2611 osdc->event_tree = RB_ROOT; 2612 osdc->event_count = 0; 2613 2614 schedule_delayed_work(&osdc->osds_timeout_work, 2615 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); 2616 2617 err = -ENOMEM; 2618 osdc->req_mempool = mempool_create_kmalloc_pool(10, 2619 sizeof(struct ceph_osd_request)); 2620 if (!osdc->req_mempool) 2621 goto out; 2622 2623 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 2624 OSD_OP_FRONT_LEN, 10, true, 2625 "osd_op"); 2626 if (err < 0) 2627 goto out_mempool; 2628 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 2629 OSD_OPREPLY_FRONT_LEN, 10, true, 2630 "osd_op_reply"); 2631 if (err < 0) 2632 goto out_msgpool; 2633 2634 err = -ENOMEM; 2635 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 2636 if (!osdc->notify_wq) 2637 goto out_msgpool_reply; 2638 2639 return 0; 2640 2641 out_msgpool_reply: 2642 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2643 out_msgpool: 2644 ceph_msgpool_destroy(&osdc->msgpool_op); 2645 out_mempool: 2646 mempool_destroy(osdc->req_mempool); 2647 out: 2648 return err; 2649 } 2650 2651 void ceph_osdc_stop(struct ceph_osd_client *osdc) 2652 { 2653 flush_workqueue(osdc->notify_wq); 2654 destroy_workqueue(osdc->notify_wq); 2655 cancel_delayed_work_sync(&osdc->timeout_work); 2656 cancel_delayed_work_sync(&osdc->osds_timeout_work); 2657 if (osdc->osdmap) { 2658 ceph_osdmap_destroy(osdc->osdmap); 2659 osdc->osdmap = NULL; 2660 } 2661 remove_all_osds(osdc); 2662 mempool_destroy(osdc->req_mempool); 2663 ceph_msgpool_destroy(&osdc->msgpool_op); 2664 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2665 } 2666 2667 /* 2668 * Read some contiguous pages. If we cross a stripe boundary, shorten 2669 * *plen. Return number of bytes read, or error. 2670 */ 2671 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 2672 struct ceph_vino vino, struct ceph_file_layout *layout, 2673 u64 off, u64 *plen, 2674 u32 truncate_seq, u64 truncate_size, 2675 struct page **pages, int num_pages, int page_align) 2676 { 2677 struct ceph_osd_request *req; 2678 int rc = 0; 2679 2680 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 2681 vino.snap, off, *plen); 2682 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 2683 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 2684 NULL, truncate_seq, truncate_size, 2685 false); 2686 if (IS_ERR(req)) 2687 return PTR_ERR(req); 2688 2689 /* it may be a short read due to an object boundary */ 2690 2691 osd_req_op_extent_osd_data_pages(req, 0, 2692 pages, *plen, page_align, false, false); 2693 2694 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 2695 off, *plen, *plen, page_align); 2696 2697 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL); 2698 2699 rc = ceph_osdc_start_request(osdc, req, false); 2700 if (!rc) 2701 rc = ceph_osdc_wait_request(osdc, req); 2702 2703 ceph_osdc_put_request(req); 2704 dout("readpages result %d\n", rc); 2705 return rc; 2706 } 2707 EXPORT_SYMBOL(ceph_osdc_readpages); 2708 2709 /* 2710 * do a synchronous write on N pages 2711 */ 2712 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 2713 struct ceph_file_layout *layout, 2714 struct ceph_snap_context *snapc, 2715 u64 off, u64 len, 2716 u32 truncate_seq, u64 truncate_size, 2717 struct timespec *mtime, 2718 struct page **pages, int num_pages) 2719 { 2720 struct ceph_osd_request *req; 2721 int rc = 0; 2722 int page_align = off & ~PAGE_MASK; 2723 2724 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */ 2725 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 2726 CEPH_OSD_OP_WRITE, 2727 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 2728 snapc, truncate_seq, truncate_size, 2729 true); 2730 if (IS_ERR(req)) 2731 return PTR_ERR(req); 2732 2733 /* it may be a short write due to an object boundary */ 2734 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 2735 false, false); 2736 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 2737 2738 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime); 2739 2740 rc = ceph_osdc_start_request(osdc, req, true); 2741 if (!rc) 2742 rc = ceph_osdc_wait_request(osdc, req); 2743 2744 ceph_osdc_put_request(req); 2745 if (rc == 0) 2746 rc = len; 2747 dout("writepages result %d\n", rc); 2748 return rc; 2749 } 2750 EXPORT_SYMBOL(ceph_osdc_writepages); 2751 2752 int ceph_osdc_setup(void) 2753 { 2754 BUG_ON(ceph_osd_request_cache); 2755 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", 2756 sizeof (struct ceph_osd_request), 2757 __alignof__(struct ceph_osd_request), 2758 0, NULL); 2759 2760 return ceph_osd_request_cache ? 0 : -ENOMEM; 2761 } 2762 EXPORT_SYMBOL(ceph_osdc_setup); 2763 2764 void ceph_osdc_cleanup(void) 2765 { 2766 BUG_ON(!ceph_osd_request_cache); 2767 kmem_cache_destroy(ceph_osd_request_cache); 2768 ceph_osd_request_cache = NULL; 2769 } 2770 EXPORT_SYMBOL(ceph_osdc_cleanup); 2771 2772 /* 2773 * handle incoming message 2774 */ 2775 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 2776 { 2777 struct ceph_osd *osd = con->private; 2778 struct ceph_osd_client *osdc; 2779 int type = le16_to_cpu(msg->hdr.type); 2780 2781 if (!osd) 2782 goto out; 2783 osdc = osd->o_osdc; 2784 2785 switch (type) { 2786 case CEPH_MSG_OSD_MAP: 2787 ceph_osdc_handle_map(osdc, msg); 2788 break; 2789 case CEPH_MSG_OSD_OPREPLY: 2790 handle_reply(osdc, msg, con); 2791 break; 2792 case CEPH_MSG_WATCH_NOTIFY: 2793 handle_watch_notify(osdc, msg); 2794 break; 2795 2796 default: 2797 pr_err("received unknown message type %d %s\n", type, 2798 ceph_msg_type_name(type)); 2799 } 2800 out: 2801 ceph_msg_put(msg); 2802 } 2803 2804 /* 2805 * lookup and return message for incoming reply. set up reply message 2806 * pages. 2807 */ 2808 static struct ceph_msg *get_reply(struct ceph_connection *con, 2809 struct ceph_msg_header *hdr, 2810 int *skip) 2811 { 2812 struct ceph_osd *osd = con->private; 2813 struct ceph_osd_client *osdc = osd->o_osdc; 2814 struct ceph_msg *m; 2815 struct ceph_osd_request *req; 2816 int front_len = le32_to_cpu(hdr->front_len); 2817 int data_len = le32_to_cpu(hdr->data_len); 2818 u64 tid; 2819 2820 tid = le64_to_cpu(hdr->tid); 2821 mutex_lock(&osdc->request_mutex); 2822 req = __lookup_request(osdc, tid); 2823 if (!req) { 2824 *skip = 1; 2825 m = NULL; 2826 dout("get_reply unknown tid %llu from osd%d\n", tid, 2827 osd->o_osd); 2828 goto out; 2829 } 2830 2831 if (req->r_reply->con) 2832 dout("%s revoking msg %p from old con %p\n", __func__, 2833 req->r_reply, req->r_reply->con); 2834 ceph_msg_revoke_incoming(req->r_reply); 2835 2836 if (front_len > req->r_reply->front_alloc_len) { 2837 pr_warn("get_reply front %d > preallocated %d (%u#%llu)\n", 2838 front_len, req->r_reply->front_alloc_len, 2839 (unsigned int)con->peer_name.type, 2840 le64_to_cpu(con->peer_name.num)); 2841 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 2842 false); 2843 if (!m) 2844 goto out; 2845 ceph_msg_put(req->r_reply); 2846 req->r_reply = m; 2847 } 2848 m = ceph_msg_get(req->r_reply); 2849 2850 if (data_len > 0) { 2851 struct ceph_osd_data *osd_data; 2852 2853 /* 2854 * XXX This is assuming there is only one op containing 2855 * XXX page data. Probably OK for reads, but this 2856 * XXX ought to be done more generally. 2857 */ 2858 osd_data = osd_req_op_extent_osd_data(req, 0); 2859 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 2860 if (osd_data->pages && 2861 unlikely(osd_data->length < data_len)) { 2862 2863 pr_warn("tid %lld reply has %d bytes we had only %llu bytes ready\n", 2864 tid, data_len, osd_data->length); 2865 *skip = 1; 2866 ceph_msg_put(m); 2867 m = NULL; 2868 goto out; 2869 } 2870 } 2871 } 2872 *skip = 0; 2873 dout("get_reply tid %lld %p\n", tid, m); 2874 2875 out: 2876 mutex_unlock(&osdc->request_mutex); 2877 return m; 2878 2879 } 2880 2881 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 2882 struct ceph_msg_header *hdr, 2883 int *skip) 2884 { 2885 struct ceph_osd *osd = con->private; 2886 int type = le16_to_cpu(hdr->type); 2887 int front = le32_to_cpu(hdr->front_len); 2888 2889 *skip = 0; 2890 switch (type) { 2891 case CEPH_MSG_OSD_MAP: 2892 case CEPH_MSG_WATCH_NOTIFY: 2893 return ceph_msg_new(type, front, GFP_NOFS, false); 2894 case CEPH_MSG_OSD_OPREPLY: 2895 return get_reply(con, hdr, skip); 2896 default: 2897 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, 2898 osd->o_osd); 2899 *skip = 1; 2900 return NULL; 2901 } 2902 } 2903 2904 /* 2905 * Wrappers to refcount containing ceph_osd struct 2906 */ 2907 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 2908 { 2909 struct ceph_osd *osd = con->private; 2910 if (get_osd(osd)) 2911 return con; 2912 return NULL; 2913 } 2914 2915 static void put_osd_con(struct ceph_connection *con) 2916 { 2917 struct ceph_osd *osd = con->private; 2918 put_osd(osd); 2919 } 2920 2921 /* 2922 * authentication 2923 */ 2924 /* 2925 * Note: returned pointer is the address of a structure that's 2926 * managed separately. Caller must *not* attempt to free it. 2927 */ 2928 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 2929 int *proto, int force_new) 2930 { 2931 struct ceph_osd *o = con->private; 2932 struct ceph_osd_client *osdc = o->o_osdc; 2933 struct ceph_auth_client *ac = osdc->client->monc.auth; 2934 struct ceph_auth_handshake *auth = &o->o_auth; 2935 2936 if (force_new && auth->authorizer) { 2937 ceph_auth_destroy_authorizer(ac, auth->authorizer); 2938 auth->authorizer = NULL; 2939 } 2940 if (!auth->authorizer) { 2941 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2942 auth); 2943 if (ret) 2944 return ERR_PTR(ret); 2945 } else { 2946 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2947 auth); 2948 if (ret) 2949 return ERR_PTR(ret); 2950 } 2951 *proto = ac->protocol; 2952 2953 return auth; 2954 } 2955 2956 2957 static int verify_authorizer_reply(struct ceph_connection *con, int len) 2958 { 2959 struct ceph_osd *o = con->private; 2960 struct ceph_osd_client *osdc = o->o_osdc; 2961 struct ceph_auth_client *ac = osdc->client->monc.auth; 2962 2963 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); 2964 } 2965 2966 static int invalidate_authorizer(struct ceph_connection *con) 2967 { 2968 struct ceph_osd *o = con->private; 2969 struct ceph_osd_client *osdc = o->o_osdc; 2970 struct ceph_auth_client *ac = osdc->client->monc.auth; 2971 2972 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 2973 return ceph_monc_validate_auth(&osdc->client->monc); 2974 } 2975 2976 static int sign_message(struct ceph_connection *con, struct ceph_msg *msg) 2977 { 2978 struct ceph_osd *o = con->private; 2979 struct ceph_auth_handshake *auth = &o->o_auth; 2980 return ceph_auth_sign_message(auth, msg); 2981 } 2982 2983 static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg) 2984 { 2985 struct ceph_osd *o = con->private; 2986 struct ceph_auth_handshake *auth = &o->o_auth; 2987 return ceph_auth_check_message_signature(auth, msg); 2988 } 2989 2990 static const struct ceph_connection_operations osd_con_ops = { 2991 .get = get_osd_con, 2992 .put = put_osd_con, 2993 .dispatch = dispatch, 2994 .get_authorizer = get_authorizer, 2995 .verify_authorizer_reply = verify_authorizer_reply, 2996 .invalidate_authorizer = invalidate_authorizer, 2997 .alloc_msg = alloc_msg, 2998 .sign_message = sign_message, 2999 .check_message_signature = check_message_signature, 3000 .fault = osd_reset, 3001 }; 3002