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 case CEPH_OSD_OP_STAT: 300 ceph_osd_data_release(&op->raw_data_in); 301 break; 302 default: 303 break; 304 } 305 } 306 307 /* 308 * requests 309 */ 310 static void ceph_osdc_release_request(struct kref *kref) 311 { 312 struct ceph_osd_request *req = container_of(kref, 313 struct ceph_osd_request, r_kref); 314 unsigned int which; 315 316 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 317 req->r_request, req->r_reply); 318 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 319 WARN_ON(!list_empty(&req->r_req_lru_item)); 320 WARN_ON(!list_empty(&req->r_osd_item)); 321 WARN_ON(!list_empty(&req->r_linger_item)); 322 WARN_ON(!list_empty(&req->r_linger_osd_item)); 323 WARN_ON(req->r_osd); 324 325 if (req->r_request) 326 ceph_msg_put(req->r_request); 327 if (req->r_reply) { 328 ceph_msg_revoke_incoming(req->r_reply); 329 ceph_msg_put(req->r_reply); 330 } 331 332 for (which = 0; which < req->r_num_ops; which++) 333 osd_req_op_data_release(req, which); 334 335 ceph_put_snap_context(req->r_snapc); 336 if (req->r_mempool) 337 mempool_free(req, req->r_osdc->req_mempool); 338 else 339 kmem_cache_free(ceph_osd_request_cache, req); 340 341 } 342 343 void ceph_osdc_get_request(struct ceph_osd_request *req) 344 { 345 dout("%s %p (was %d)\n", __func__, req, 346 atomic_read(&req->r_kref.refcount)); 347 kref_get(&req->r_kref); 348 } 349 EXPORT_SYMBOL(ceph_osdc_get_request); 350 351 void ceph_osdc_put_request(struct ceph_osd_request *req) 352 { 353 dout("%s %p (was %d)\n", __func__, req, 354 atomic_read(&req->r_kref.refcount)); 355 kref_put(&req->r_kref, ceph_osdc_release_request); 356 } 357 EXPORT_SYMBOL(ceph_osdc_put_request); 358 359 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 360 struct ceph_snap_context *snapc, 361 unsigned int num_ops, 362 bool use_mempool, 363 gfp_t gfp_flags) 364 { 365 struct ceph_osd_request *req; 366 struct ceph_msg *msg; 367 size_t msg_size; 368 369 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX); 370 BUG_ON(num_ops > CEPH_OSD_MAX_OP); 371 372 msg_size = 4 + 4 + 8 + 8 + 4+8; 373 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */ 374 msg_size += 1 + 8 + 4 + 4; /* pg_t */ 375 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */ 376 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op); 377 msg_size += 8; /* snapid */ 378 msg_size += 8; /* snap_seq */ 379 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */ 380 msg_size += 4; 381 382 if (use_mempool) { 383 req = mempool_alloc(osdc->req_mempool, gfp_flags); 384 memset(req, 0, sizeof(*req)); 385 } else { 386 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags); 387 } 388 if (req == NULL) 389 return NULL; 390 391 req->r_osdc = osdc; 392 req->r_mempool = use_mempool; 393 req->r_num_ops = num_ops; 394 395 kref_init(&req->r_kref); 396 init_completion(&req->r_completion); 397 init_completion(&req->r_safe_completion); 398 RB_CLEAR_NODE(&req->r_node); 399 INIT_LIST_HEAD(&req->r_unsafe_item); 400 INIT_LIST_HEAD(&req->r_linger_item); 401 INIT_LIST_HEAD(&req->r_linger_osd_item); 402 INIT_LIST_HEAD(&req->r_req_lru_item); 403 INIT_LIST_HEAD(&req->r_osd_item); 404 405 req->r_base_oloc.pool = -1; 406 req->r_target_oloc.pool = -1; 407 408 /* create reply message */ 409 if (use_mempool) 410 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 411 else 412 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, 413 OSD_OPREPLY_FRONT_LEN, gfp_flags, true); 414 if (!msg) { 415 ceph_osdc_put_request(req); 416 return NULL; 417 } 418 req->r_reply = msg; 419 420 /* create request message; allow space for oid */ 421 if (use_mempool) 422 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 423 else 424 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true); 425 if (!msg) { 426 ceph_osdc_put_request(req); 427 return NULL; 428 } 429 430 memset(msg->front.iov_base, 0, msg->front.iov_len); 431 432 req->r_request = msg; 433 434 return req; 435 } 436 EXPORT_SYMBOL(ceph_osdc_alloc_request); 437 438 static bool osd_req_opcode_valid(u16 opcode) 439 { 440 switch (opcode) { 441 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 442 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 443 #undef GENERATE_CASE 444 default: 445 return false; 446 } 447 } 448 449 /* 450 * This is an osd op init function for opcodes that have no data or 451 * other information associated with them. It also serves as a 452 * common init routine for all the other init functions, below. 453 */ 454 static struct ceph_osd_req_op * 455 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 456 u16 opcode, u32 flags) 457 { 458 struct ceph_osd_req_op *op; 459 460 BUG_ON(which >= osd_req->r_num_ops); 461 BUG_ON(!osd_req_opcode_valid(opcode)); 462 463 op = &osd_req->r_ops[which]; 464 memset(op, 0, sizeof (*op)); 465 op->op = opcode; 466 op->flags = flags; 467 468 return op; 469 } 470 471 void osd_req_op_init(struct ceph_osd_request *osd_req, 472 unsigned int which, u16 opcode, u32 flags) 473 { 474 (void)_osd_req_op_init(osd_req, which, opcode, flags); 475 } 476 EXPORT_SYMBOL(osd_req_op_init); 477 478 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 479 unsigned int which, u16 opcode, 480 u64 offset, u64 length, 481 u64 truncate_size, u32 truncate_seq) 482 { 483 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 484 opcode, 0); 485 size_t payload_len = 0; 486 487 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 488 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE); 489 490 op->extent.offset = offset; 491 op->extent.length = length; 492 op->extent.truncate_size = truncate_size; 493 op->extent.truncate_seq = truncate_seq; 494 if (opcode == CEPH_OSD_OP_WRITE) 495 payload_len += length; 496 497 op->payload_len = payload_len; 498 } 499 EXPORT_SYMBOL(osd_req_op_extent_init); 500 501 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 502 unsigned int which, u64 length) 503 { 504 struct ceph_osd_req_op *op; 505 u64 previous; 506 507 BUG_ON(which >= osd_req->r_num_ops); 508 op = &osd_req->r_ops[which]; 509 previous = op->extent.length; 510 511 if (length == previous) 512 return; /* Nothing to do */ 513 BUG_ON(length > previous); 514 515 op->extent.length = length; 516 op->payload_len -= previous - length; 517 } 518 EXPORT_SYMBOL(osd_req_op_extent_update); 519 520 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 521 u16 opcode, const char *class, const char *method) 522 { 523 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 524 opcode, 0); 525 struct ceph_pagelist *pagelist; 526 size_t payload_len = 0; 527 size_t size; 528 529 BUG_ON(opcode != CEPH_OSD_OP_CALL); 530 531 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 532 BUG_ON(!pagelist); 533 ceph_pagelist_init(pagelist); 534 535 op->cls.class_name = class; 536 size = strlen(class); 537 BUG_ON(size > (size_t) U8_MAX); 538 op->cls.class_len = size; 539 ceph_pagelist_append(pagelist, class, size); 540 payload_len += size; 541 542 op->cls.method_name = method; 543 size = strlen(method); 544 BUG_ON(size > (size_t) U8_MAX); 545 op->cls.method_len = size; 546 ceph_pagelist_append(pagelist, method, size); 547 payload_len += size; 548 549 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 550 551 op->cls.argc = 0; /* currently unused */ 552 553 op->payload_len = payload_len; 554 } 555 EXPORT_SYMBOL(osd_req_op_cls_init); 556 557 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 558 u16 opcode, const char *name, const void *value, 559 size_t size, u8 cmp_op, u8 cmp_mode) 560 { 561 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 562 opcode, 0); 563 struct ceph_pagelist *pagelist; 564 size_t payload_len; 565 566 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 567 568 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 569 if (!pagelist) 570 return -ENOMEM; 571 572 ceph_pagelist_init(pagelist); 573 574 payload_len = strlen(name); 575 op->xattr.name_len = payload_len; 576 ceph_pagelist_append(pagelist, name, payload_len); 577 578 op->xattr.value_len = size; 579 ceph_pagelist_append(pagelist, value, size); 580 payload_len += size; 581 582 op->xattr.cmp_op = cmp_op; 583 op->xattr.cmp_mode = cmp_mode; 584 585 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 586 op->payload_len = payload_len; 587 return 0; 588 } 589 EXPORT_SYMBOL(osd_req_op_xattr_init); 590 591 void osd_req_op_watch_init(struct ceph_osd_request *osd_req, 592 unsigned int which, u16 opcode, 593 u64 cookie, u64 version, int flag) 594 { 595 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 596 opcode, 0); 597 598 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH); 599 600 op->watch.cookie = cookie; 601 op->watch.ver = version; 602 if (opcode == CEPH_OSD_OP_WATCH && flag) 603 op->watch.flag = (u8)1; 604 } 605 EXPORT_SYMBOL(osd_req_op_watch_init); 606 607 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 608 unsigned int which, 609 u64 expected_object_size, 610 u64 expected_write_size) 611 { 612 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 613 CEPH_OSD_OP_SETALLOCHINT, 614 0); 615 616 op->alloc_hint.expected_object_size = expected_object_size; 617 op->alloc_hint.expected_write_size = expected_write_size; 618 619 /* 620 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 621 * not worth a feature bit. Set FAILOK per-op flag to make 622 * sure older osds don't trip over an unsupported opcode. 623 */ 624 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 625 } 626 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 627 628 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 629 struct ceph_osd_data *osd_data) 630 { 631 u64 length = ceph_osd_data_length(osd_data); 632 633 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 634 BUG_ON(length > (u64) SIZE_MAX); 635 if (length) 636 ceph_msg_data_add_pages(msg, osd_data->pages, 637 length, osd_data->alignment); 638 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 639 BUG_ON(!length); 640 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 641 #ifdef CONFIG_BLOCK 642 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 643 ceph_msg_data_add_bio(msg, osd_data->bio, length); 644 #endif 645 } else { 646 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 647 } 648 } 649 650 static u64 osd_req_encode_op(struct ceph_osd_request *req, 651 struct ceph_osd_op *dst, unsigned int which) 652 { 653 struct ceph_osd_req_op *src; 654 struct ceph_osd_data *osd_data; 655 u64 request_data_len = 0; 656 u64 data_length; 657 658 BUG_ON(which >= req->r_num_ops); 659 src = &req->r_ops[which]; 660 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 661 pr_err("unrecognized osd opcode %d\n", src->op); 662 663 return 0; 664 } 665 666 switch (src->op) { 667 case CEPH_OSD_OP_STAT: 668 osd_data = &src->raw_data_in; 669 ceph_osdc_msg_data_add(req->r_reply, osd_data); 670 break; 671 case CEPH_OSD_OP_READ: 672 case CEPH_OSD_OP_WRITE: 673 case CEPH_OSD_OP_ZERO: 674 case CEPH_OSD_OP_TRUNCATE: 675 if (src->op == CEPH_OSD_OP_WRITE) 676 request_data_len = src->extent.length; 677 dst->extent.offset = cpu_to_le64(src->extent.offset); 678 dst->extent.length = cpu_to_le64(src->extent.length); 679 dst->extent.truncate_size = 680 cpu_to_le64(src->extent.truncate_size); 681 dst->extent.truncate_seq = 682 cpu_to_le32(src->extent.truncate_seq); 683 osd_data = &src->extent.osd_data; 684 if (src->op == CEPH_OSD_OP_WRITE) 685 ceph_osdc_msg_data_add(req->r_request, osd_data); 686 else 687 ceph_osdc_msg_data_add(req->r_reply, osd_data); 688 break; 689 case CEPH_OSD_OP_CALL: 690 dst->cls.class_len = src->cls.class_len; 691 dst->cls.method_len = src->cls.method_len; 692 osd_data = &src->cls.request_info; 693 ceph_osdc_msg_data_add(req->r_request, osd_data); 694 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST); 695 request_data_len = osd_data->pagelist->length; 696 697 osd_data = &src->cls.request_data; 698 data_length = ceph_osd_data_length(osd_data); 699 if (data_length) { 700 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE); 701 dst->cls.indata_len = cpu_to_le32(data_length); 702 ceph_osdc_msg_data_add(req->r_request, osd_data); 703 src->payload_len += data_length; 704 request_data_len += data_length; 705 } 706 osd_data = &src->cls.response_data; 707 ceph_osdc_msg_data_add(req->r_reply, osd_data); 708 break; 709 case CEPH_OSD_OP_STARTSYNC: 710 break; 711 case CEPH_OSD_OP_NOTIFY_ACK: 712 case CEPH_OSD_OP_WATCH: 713 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 714 dst->watch.ver = cpu_to_le64(src->watch.ver); 715 dst->watch.flag = src->watch.flag; 716 break; 717 case CEPH_OSD_OP_SETALLOCHINT: 718 dst->alloc_hint.expected_object_size = 719 cpu_to_le64(src->alloc_hint.expected_object_size); 720 dst->alloc_hint.expected_write_size = 721 cpu_to_le64(src->alloc_hint.expected_write_size); 722 break; 723 case CEPH_OSD_OP_SETXATTR: 724 case CEPH_OSD_OP_CMPXATTR: 725 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 726 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 727 dst->xattr.cmp_op = src->xattr.cmp_op; 728 dst->xattr.cmp_mode = src->xattr.cmp_mode; 729 osd_data = &src->xattr.osd_data; 730 ceph_osdc_msg_data_add(req->r_request, osd_data); 731 request_data_len = osd_data->pagelist->length; 732 break; 733 case CEPH_OSD_OP_CREATE: 734 case CEPH_OSD_OP_DELETE: 735 break; 736 default: 737 pr_err("unsupported osd opcode %s\n", 738 ceph_osd_op_name(src->op)); 739 WARN_ON(1); 740 741 return 0; 742 } 743 744 dst->op = cpu_to_le16(src->op); 745 dst->flags = cpu_to_le32(src->flags); 746 dst->payload_len = cpu_to_le32(src->payload_len); 747 748 return request_data_len; 749 } 750 751 /* 752 * build new request AND message, calculate layout, and adjust file 753 * extent as needed. 754 * 755 * if the file was recently truncated, we include information about its 756 * old and new size so that the object can be updated appropriately. (we 757 * avoid synchronously deleting truncated objects because it's slow.) 758 * 759 * if @do_sync, include a 'startsync' command so that the osd will flush 760 * data quickly. 761 */ 762 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 763 struct ceph_file_layout *layout, 764 struct ceph_vino vino, 765 u64 off, u64 *plen, 766 unsigned int which, int num_ops, 767 int opcode, int flags, 768 struct ceph_snap_context *snapc, 769 u32 truncate_seq, 770 u64 truncate_size, 771 bool use_mempool) 772 { 773 struct ceph_osd_request *req; 774 u64 objnum = 0; 775 u64 objoff = 0; 776 u64 objlen = 0; 777 int r; 778 779 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 780 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 781 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 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 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 798 osd_req_op_init(req, which, opcode, 0); 799 } else { 800 u32 object_size = le32_to_cpu(layout->fl_object_size); 801 u32 object_base = off - objoff; 802 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 803 if (truncate_size <= object_base) { 804 truncate_size = 0; 805 } else { 806 truncate_size -= object_base; 807 if (truncate_size > object_size) 808 truncate_size = object_size; 809 } 810 } 811 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 812 truncate_size, truncate_seq); 813 } 814 815 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout); 816 817 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name), 818 "%llx.%08llx", vino.ino, objnum); 819 req->r_base_oid.name_len = strlen(req->r_base_oid.name); 820 821 return req; 822 } 823 EXPORT_SYMBOL(ceph_osdc_new_request); 824 825 /* 826 * We keep osd requests in an rbtree, sorted by ->r_tid. 827 */ 828 static void __insert_request(struct ceph_osd_client *osdc, 829 struct ceph_osd_request *new) 830 { 831 struct rb_node **p = &osdc->requests.rb_node; 832 struct rb_node *parent = NULL; 833 struct ceph_osd_request *req = NULL; 834 835 while (*p) { 836 parent = *p; 837 req = rb_entry(parent, struct ceph_osd_request, r_node); 838 if (new->r_tid < req->r_tid) 839 p = &(*p)->rb_left; 840 else if (new->r_tid > req->r_tid) 841 p = &(*p)->rb_right; 842 else 843 BUG(); 844 } 845 846 rb_link_node(&new->r_node, parent, p); 847 rb_insert_color(&new->r_node, &osdc->requests); 848 } 849 850 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, 851 u64 tid) 852 { 853 struct ceph_osd_request *req; 854 struct rb_node *n = osdc->requests.rb_node; 855 856 while (n) { 857 req = rb_entry(n, struct ceph_osd_request, r_node); 858 if (tid < req->r_tid) 859 n = n->rb_left; 860 else if (tid > req->r_tid) 861 n = n->rb_right; 862 else 863 return req; 864 } 865 return NULL; 866 } 867 868 static struct ceph_osd_request * 869 __lookup_request_ge(struct ceph_osd_client *osdc, 870 u64 tid) 871 { 872 struct ceph_osd_request *req; 873 struct rb_node *n = osdc->requests.rb_node; 874 875 while (n) { 876 req = rb_entry(n, struct ceph_osd_request, r_node); 877 if (tid < req->r_tid) { 878 if (!n->rb_left) 879 return req; 880 n = n->rb_left; 881 } else if (tid > req->r_tid) { 882 n = n->rb_right; 883 } else { 884 return req; 885 } 886 } 887 return NULL; 888 } 889 890 static void __kick_linger_request(struct ceph_osd_request *req) 891 { 892 struct ceph_osd_client *osdc = req->r_osdc; 893 struct ceph_osd *osd = req->r_osd; 894 895 /* 896 * Linger requests need to be resent with a new tid to avoid 897 * the dup op detection logic on the OSDs. Achieve this with 898 * a re-register dance instead of open-coding. 899 */ 900 ceph_osdc_get_request(req); 901 if (!list_empty(&req->r_linger_item)) 902 __unregister_linger_request(osdc, req); 903 else 904 __unregister_request(osdc, req); 905 __register_request(osdc, req); 906 ceph_osdc_put_request(req); 907 908 /* 909 * Unless request has been registered as both normal and 910 * lingering, __unregister{,_linger}_request clears r_osd. 911 * However, here we need to preserve r_osd to make sure we 912 * requeue on the same OSD. 913 */ 914 WARN_ON(req->r_osd || !osd); 915 req->r_osd = osd; 916 917 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid); 918 __enqueue_request(req); 919 } 920 921 /* 922 * Resubmit requests pending on the given osd. 923 */ 924 static void __kick_osd_requests(struct ceph_osd_client *osdc, 925 struct ceph_osd *osd) 926 { 927 struct ceph_osd_request *req, *nreq; 928 LIST_HEAD(resend); 929 LIST_HEAD(resend_linger); 930 int err; 931 932 dout("%s osd%d\n", __func__, osd->o_osd); 933 err = __reset_osd(osdc, osd); 934 if (err) 935 return; 936 937 /* 938 * Build up a list of requests to resend by traversing the 939 * osd's list of requests. Requests for a given object are 940 * sent in tid order, and that is also the order they're 941 * kept on this list. Therefore all requests that are in 942 * flight will be found first, followed by all requests that 943 * have not yet been sent. And to resend requests while 944 * preserving this order we will want to put any sent 945 * requests back on the front of the osd client's unsent 946 * list. 947 * 948 * So we build a separate ordered list of already-sent 949 * requests for the affected osd and splice it onto the 950 * front of the osd client's unsent list. Once we've seen a 951 * request that has not yet been sent we're done. Those 952 * requests are already sitting right where they belong. 953 */ 954 list_for_each_entry(req, &osd->o_requests, r_osd_item) { 955 if (!req->r_sent) 956 break; 957 958 if (!req->r_linger) { 959 dout("%s requeueing %p tid %llu\n", __func__, req, 960 req->r_tid); 961 list_move_tail(&req->r_req_lru_item, &resend); 962 req->r_flags |= CEPH_OSD_FLAG_RETRY; 963 } else { 964 list_move_tail(&req->r_req_lru_item, &resend_linger); 965 } 966 } 967 list_splice(&resend, &osdc->req_unsent); 968 969 /* 970 * Both registered and not yet registered linger requests are 971 * enqueued with a new tid on the same OSD. We add/move them 972 * to req_unsent/o_requests at the end to keep things in tid 973 * order. 974 */ 975 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, 976 r_linger_osd_item) { 977 WARN_ON(!list_empty(&req->r_req_lru_item)); 978 __kick_linger_request(req); 979 } 980 981 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item) 982 __kick_linger_request(req); 983 } 984 985 /* 986 * If the osd connection drops, we need to resubmit all requests. 987 */ 988 static void osd_reset(struct ceph_connection *con) 989 { 990 struct ceph_osd *osd = con->private; 991 struct ceph_osd_client *osdc; 992 993 if (!osd) 994 return; 995 dout("osd_reset osd%d\n", osd->o_osd); 996 osdc = osd->o_osdc; 997 down_read(&osdc->map_sem); 998 mutex_lock(&osdc->request_mutex); 999 __kick_osd_requests(osdc, osd); 1000 __send_queued(osdc); 1001 mutex_unlock(&osdc->request_mutex); 1002 up_read(&osdc->map_sem); 1003 } 1004 1005 /* 1006 * Track open sessions with osds. 1007 */ 1008 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1009 { 1010 struct ceph_osd *osd; 1011 1012 osd = kzalloc(sizeof(*osd), GFP_NOFS); 1013 if (!osd) 1014 return NULL; 1015 1016 atomic_set(&osd->o_ref, 1); 1017 osd->o_osdc = osdc; 1018 osd->o_osd = onum; 1019 RB_CLEAR_NODE(&osd->o_node); 1020 INIT_LIST_HEAD(&osd->o_requests); 1021 INIT_LIST_HEAD(&osd->o_linger_requests); 1022 INIT_LIST_HEAD(&osd->o_osd_lru); 1023 osd->o_incarnation = 1; 1024 1025 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1026 1027 INIT_LIST_HEAD(&osd->o_keepalive_item); 1028 return osd; 1029 } 1030 1031 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1032 { 1033 if (atomic_inc_not_zero(&osd->o_ref)) { 1034 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, 1035 atomic_read(&osd->o_ref)); 1036 return osd; 1037 } else { 1038 dout("get_osd %p FAIL\n", osd); 1039 return NULL; 1040 } 1041 } 1042 1043 static void put_osd(struct ceph_osd *osd) 1044 { 1045 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), 1046 atomic_read(&osd->o_ref) - 1); 1047 if (atomic_dec_and_test(&osd->o_ref)) { 1048 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; 1049 1050 if (osd->o_auth.authorizer) 1051 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer); 1052 kfree(osd); 1053 } 1054 } 1055 1056 /* 1057 * remove an osd from our map 1058 */ 1059 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1060 { 1061 dout("%s %p osd%d\n", __func__, osd, osd->o_osd); 1062 WARN_ON(!list_empty(&osd->o_requests)); 1063 WARN_ON(!list_empty(&osd->o_linger_requests)); 1064 1065 list_del_init(&osd->o_osd_lru); 1066 rb_erase(&osd->o_node, &osdc->osds); 1067 RB_CLEAR_NODE(&osd->o_node); 1068 } 1069 1070 static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1071 { 1072 dout("%s %p osd%d\n", __func__, osd, osd->o_osd); 1073 1074 if (!RB_EMPTY_NODE(&osd->o_node)) { 1075 ceph_con_close(&osd->o_con); 1076 __remove_osd(osdc, osd); 1077 put_osd(osd); 1078 } 1079 } 1080 1081 static void remove_all_osds(struct ceph_osd_client *osdc) 1082 { 1083 dout("%s %p\n", __func__, osdc); 1084 mutex_lock(&osdc->request_mutex); 1085 while (!RB_EMPTY_ROOT(&osdc->osds)) { 1086 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 1087 struct ceph_osd, o_node); 1088 remove_osd(osdc, osd); 1089 } 1090 mutex_unlock(&osdc->request_mutex); 1091 } 1092 1093 static void __move_osd_to_lru(struct ceph_osd_client *osdc, 1094 struct ceph_osd *osd) 1095 { 1096 dout("%s %p\n", __func__, osd); 1097 BUG_ON(!list_empty(&osd->o_osd_lru)); 1098 1099 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1100 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ; 1101 } 1102 1103 static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc, 1104 struct ceph_osd *osd) 1105 { 1106 dout("%s %p\n", __func__, osd); 1107 1108 if (list_empty(&osd->o_requests) && 1109 list_empty(&osd->o_linger_requests)) 1110 __move_osd_to_lru(osdc, osd); 1111 } 1112 1113 static void __remove_osd_from_lru(struct ceph_osd *osd) 1114 { 1115 dout("__remove_osd_from_lru %p\n", osd); 1116 if (!list_empty(&osd->o_osd_lru)) 1117 list_del_init(&osd->o_osd_lru); 1118 } 1119 1120 static void remove_old_osds(struct ceph_osd_client *osdc) 1121 { 1122 struct ceph_osd *osd, *nosd; 1123 1124 dout("__remove_old_osds %p\n", osdc); 1125 mutex_lock(&osdc->request_mutex); 1126 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 1127 if (time_before(jiffies, osd->lru_ttl)) 1128 break; 1129 remove_osd(osdc, osd); 1130 } 1131 mutex_unlock(&osdc->request_mutex); 1132 } 1133 1134 /* 1135 * reset osd connect 1136 */ 1137 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1138 { 1139 struct ceph_entity_addr *peer_addr; 1140 1141 dout("__reset_osd %p osd%d\n", osd, osd->o_osd); 1142 if (list_empty(&osd->o_requests) && 1143 list_empty(&osd->o_linger_requests)) { 1144 remove_osd(osdc, osd); 1145 return -ENODEV; 1146 } 1147 1148 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd]; 1149 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1150 !ceph_con_opened(&osd->o_con)) { 1151 struct ceph_osd_request *req; 1152 1153 dout("osd addr hasn't changed and connection never opened, " 1154 "letting msgr retry\n"); 1155 /* touch each r_stamp for handle_timeout()'s benfit */ 1156 list_for_each_entry(req, &osd->o_requests, r_osd_item) 1157 req->r_stamp = jiffies; 1158 1159 return -EAGAIN; 1160 } 1161 1162 ceph_con_close(&osd->o_con); 1163 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1164 osd->o_incarnation++; 1165 1166 return 0; 1167 } 1168 1169 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) 1170 { 1171 struct rb_node **p = &osdc->osds.rb_node; 1172 struct rb_node *parent = NULL; 1173 struct ceph_osd *osd = NULL; 1174 1175 dout("__insert_osd %p osd%d\n", new, new->o_osd); 1176 while (*p) { 1177 parent = *p; 1178 osd = rb_entry(parent, struct ceph_osd, o_node); 1179 if (new->o_osd < osd->o_osd) 1180 p = &(*p)->rb_left; 1181 else if (new->o_osd > osd->o_osd) 1182 p = &(*p)->rb_right; 1183 else 1184 BUG(); 1185 } 1186 1187 rb_link_node(&new->o_node, parent, p); 1188 rb_insert_color(&new->o_node, &osdc->osds); 1189 } 1190 1191 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) 1192 { 1193 struct ceph_osd *osd; 1194 struct rb_node *n = osdc->osds.rb_node; 1195 1196 while (n) { 1197 osd = rb_entry(n, struct ceph_osd, o_node); 1198 if (o < osd->o_osd) 1199 n = n->rb_left; 1200 else if (o > osd->o_osd) 1201 n = n->rb_right; 1202 else 1203 return osd; 1204 } 1205 return NULL; 1206 } 1207 1208 static void __schedule_osd_timeout(struct ceph_osd_client *osdc) 1209 { 1210 schedule_delayed_work(&osdc->timeout_work, 1211 osdc->client->options->osd_keepalive_timeout * HZ); 1212 } 1213 1214 static void __cancel_osd_timeout(struct ceph_osd_client *osdc) 1215 { 1216 cancel_delayed_work(&osdc->timeout_work); 1217 } 1218 1219 /* 1220 * Register request, assign tid. If this is the first request, set up 1221 * the timeout event. 1222 */ 1223 static void __register_request(struct ceph_osd_client *osdc, 1224 struct ceph_osd_request *req) 1225 { 1226 req->r_tid = ++osdc->last_tid; 1227 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 1228 dout("__register_request %p tid %lld\n", req, req->r_tid); 1229 __insert_request(osdc, req); 1230 ceph_osdc_get_request(req); 1231 osdc->num_requests++; 1232 if (osdc->num_requests == 1) { 1233 dout(" first request, scheduling timeout\n"); 1234 __schedule_osd_timeout(osdc); 1235 } 1236 } 1237 1238 /* 1239 * called under osdc->request_mutex 1240 */ 1241 static void __unregister_request(struct ceph_osd_client *osdc, 1242 struct ceph_osd_request *req) 1243 { 1244 if (RB_EMPTY_NODE(&req->r_node)) { 1245 dout("__unregister_request %p tid %lld not registered\n", 1246 req, req->r_tid); 1247 return; 1248 } 1249 1250 dout("__unregister_request %p tid %lld\n", req, req->r_tid); 1251 rb_erase(&req->r_node, &osdc->requests); 1252 RB_CLEAR_NODE(&req->r_node); 1253 osdc->num_requests--; 1254 1255 if (req->r_osd) { 1256 /* make sure the original request isn't in flight. */ 1257 ceph_msg_revoke(req->r_request); 1258 1259 list_del_init(&req->r_osd_item); 1260 maybe_move_osd_to_lru(osdc, req->r_osd); 1261 if (list_empty(&req->r_linger_osd_item)) 1262 req->r_osd = NULL; 1263 } 1264 1265 list_del_init(&req->r_req_lru_item); 1266 ceph_osdc_put_request(req); 1267 1268 if (osdc->num_requests == 0) { 1269 dout(" no requests, canceling timeout\n"); 1270 __cancel_osd_timeout(osdc); 1271 } 1272 } 1273 1274 /* 1275 * Cancel a previously queued request message 1276 */ 1277 static void __cancel_request(struct ceph_osd_request *req) 1278 { 1279 if (req->r_sent && req->r_osd) { 1280 ceph_msg_revoke(req->r_request); 1281 req->r_sent = 0; 1282 } 1283 } 1284 1285 static void __register_linger_request(struct ceph_osd_client *osdc, 1286 struct ceph_osd_request *req) 1287 { 1288 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 1289 WARN_ON(!req->r_linger); 1290 1291 ceph_osdc_get_request(req); 1292 list_add_tail(&req->r_linger_item, &osdc->req_linger); 1293 if (req->r_osd) 1294 list_add_tail(&req->r_linger_osd_item, 1295 &req->r_osd->o_linger_requests); 1296 } 1297 1298 static void __unregister_linger_request(struct ceph_osd_client *osdc, 1299 struct ceph_osd_request *req) 1300 { 1301 WARN_ON(!req->r_linger); 1302 1303 if (list_empty(&req->r_linger_item)) { 1304 dout("%s %p tid %llu not registered\n", __func__, req, 1305 req->r_tid); 1306 return; 1307 } 1308 1309 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 1310 list_del_init(&req->r_linger_item); 1311 1312 if (req->r_osd) { 1313 list_del_init(&req->r_linger_osd_item); 1314 maybe_move_osd_to_lru(osdc, req->r_osd); 1315 if (list_empty(&req->r_osd_item)) 1316 req->r_osd = NULL; 1317 } 1318 ceph_osdc_put_request(req); 1319 } 1320 1321 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 1322 struct ceph_osd_request *req) 1323 { 1324 if (!req->r_linger) { 1325 dout("set_request_linger %p\n", req); 1326 req->r_linger = 1; 1327 } 1328 } 1329 EXPORT_SYMBOL(ceph_osdc_set_request_linger); 1330 1331 /* 1332 * Returns whether a request should be blocked from being sent 1333 * based on the current osdmap and osd_client settings. 1334 * 1335 * Caller should hold map_sem for read. 1336 */ 1337 static bool __req_should_be_paused(struct ceph_osd_client *osdc, 1338 struct ceph_osd_request *req) 1339 { 1340 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); 1341 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || 1342 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 1343 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) || 1344 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr); 1345 } 1346 1347 /* 1348 * Calculate mapping of a request to a PG. Takes tiering into account. 1349 */ 1350 static int __calc_request_pg(struct ceph_osdmap *osdmap, 1351 struct ceph_osd_request *req, 1352 struct ceph_pg *pg_out) 1353 { 1354 bool need_check_tiering; 1355 1356 need_check_tiering = false; 1357 if (req->r_target_oloc.pool == -1) { 1358 req->r_target_oloc = req->r_base_oloc; /* struct */ 1359 need_check_tiering = true; 1360 } 1361 if (req->r_target_oid.name_len == 0) { 1362 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid); 1363 need_check_tiering = true; 1364 } 1365 1366 if (need_check_tiering && 1367 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1368 struct ceph_pg_pool_info *pi; 1369 1370 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool); 1371 if (pi) { 1372 if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1373 pi->read_tier >= 0) 1374 req->r_target_oloc.pool = pi->read_tier; 1375 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1376 pi->write_tier >= 0) 1377 req->r_target_oloc.pool = pi->write_tier; 1378 } 1379 /* !pi is caught in ceph_oloc_oid_to_pg() */ 1380 } 1381 1382 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc, 1383 &req->r_target_oid, pg_out); 1384 } 1385 1386 static void __enqueue_request(struct ceph_osd_request *req) 1387 { 1388 struct ceph_osd_client *osdc = req->r_osdc; 1389 1390 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid, 1391 req->r_osd ? req->r_osd->o_osd : -1); 1392 1393 if (req->r_osd) { 1394 __remove_osd_from_lru(req->r_osd); 1395 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); 1396 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent); 1397 } else { 1398 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget); 1399 } 1400 } 1401 1402 /* 1403 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct 1404 * (as needed), and set the request r_osd appropriately. If there is 1405 * no up osd, set r_osd to NULL. Move the request to the appropriate list 1406 * (unsent, homeless) or leave on in-flight lru. 1407 * 1408 * Return 0 if unchanged, 1 if changed, or negative on error. 1409 * 1410 * Caller should hold map_sem for read and request_mutex. 1411 */ 1412 static int __map_request(struct ceph_osd_client *osdc, 1413 struct ceph_osd_request *req, int force_resend) 1414 { 1415 struct ceph_pg pgid; 1416 int acting[CEPH_PG_MAX_SIZE]; 1417 int num, o; 1418 int err; 1419 bool was_paused; 1420 1421 dout("map_request %p tid %lld\n", req, req->r_tid); 1422 1423 err = __calc_request_pg(osdc->osdmap, req, &pgid); 1424 if (err) { 1425 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1426 return err; 1427 } 1428 req->r_pgid = pgid; 1429 1430 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o); 1431 if (num < 0) 1432 num = 0; 1433 1434 was_paused = req->r_paused; 1435 req->r_paused = __req_should_be_paused(osdc, req); 1436 if (was_paused && !req->r_paused) 1437 force_resend = 1; 1438 1439 if ((!force_resend && 1440 req->r_osd && req->r_osd->o_osd == o && 1441 req->r_sent >= req->r_osd->o_incarnation && 1442 req->r_num_pg_osds == num && 1443 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || 1444 (req->r_osd == NULL && o == -1) || 1445 req->r_paused) 1446 return 0; /* no change */ 1447 1448 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n", 1449 req->r_tid, pgid.pool, pgid.seed, o, 1450 req->r_osd ? req->r_osd->o_osd : -1); 1451 1452 /* record full pg acting set */ 1453 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); 1454 req->r_num_pg_osds = num; 1455 1456 if (req->r_osd) { 1457 __cancel_request(req); 1458 list_del_init(&req->r_osd_item); 1459 list_del_init(&req->r_linger_osd_item); 1460 req->r_osd = NULL; 1461 } 1462 1463 req->r_osd = __lookup_osd(osdc, o); 1464 if (!req->r_osd && o >= 0) { 1465 err = -ENOMEM; 1466 req->r_osd = create_osd(osdc, o); 1467 if (!req->r_osd) { 1468 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1469 goto out; 1470 } 1471 1472 dout("map_request osd %p is osd%d\n", req->r_osd, o); 1473 __insert_osd(osdc, req->r_osd); 1474 1475 ceph_con_open(&req->r_osd->o_con, 1476 CEPH_ENTITY_TYPE_OSD, o, 1477 &osdc->osdmap->osd_addr[o]); 1478 } 1479 1480 __enqueue_request(req); 1481 err = 1; /* osd or pg changed */ 1482 1483 out: 1484 return err; 1485 } 1486 1487 /* 1488 * caller should hold map_sem (for read) and request_mutex 1489 */ 1490 static void __send_request(struct ceph_osd_client *osdc, 1491 struct ceph_osd_request *req) 1492 { 1493 void *p; 1494 1495 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n", 1496 req, req->r_tid, req->r_osd->o_osd, req->r_flags, 1497 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed); 1498 1499 /* fill in message content that changes each time we send it */ 1500 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch); 1501 put_unaligned_le32(req->r_flags, req->r_request_flags); 1502 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool); 1503 p = req->r_request_pgid; 1504 ceph_encode_64(&p, req->r_pgid.pool); 1505 ceph_encode_32(&p, req->r_pgid.seed); 1506 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */ 1507 memcpy(req->r_request_reassert_version, &req->r_reassert_version, 1508 sizeof(req->r_reassert_version)); 1509 1510 req->r_stamp = jiffies; 1511 list_move_tail(&req->r_req_lru_item, &osdc->req_lru); 1512 1513 ceph_msg_get(req->r_request); /* send consumes a ref */ 1514 1515 req->r_sent = req->r_osd->o_incarnation; 1516 1517 ceph_con_send(&req->r_osd->o_con, req->r_request); 1518 } 1519 1520 /* 1521 * Send any requests in the queue (req_unsent). 1522 */ 1523 static void __send_queued(struct ceph_osd_client *osdc) 1524 { 1525 struct ceph_osd_request *req, *tmp; 1526 1527 dout("__send_queued\n"); 1528 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) 1529 __send_request(osdc, req); 1530 } 1531 1532 /* 1533 * Caller should hold map_sem for read and request_mutex. 1534 */ 1535 static int __ceph_osdc_start_request(struct ceph_osd_client *osdc, 1536 struct ceph_osd_request *req, 1537 bool nofail) 1538 { 1539 int rc; 1540 1541 __register_request(osdc, req); 1542 req->r_sent = 0; 1543 req->r_got_reply = 0; 1544 rc = __map_request(osdc, req, 0); 1545 if (rc < 0) { 1546 if (nofail) { 1547 dout("osdc_start_request failed map, " 1548 " will retry %lld\n", req->r_tid); 1549 rc = 0; 1550 } else { 1551 __unregister_request(osdc, req); 1552 } 1553 return rc; 1554 } 1555 1556 if (req->r_osd == NULL) { 1557 dout("send_request %p no up osds in pg\n", req); 1558 ceph_monc_request_next_osdmap(&osdc->client->monc); 1559 } else { 1560 __send_queued(osdc); 1561 } 1562 1563 return 0; 1564 } 1565 1566 /* 1567 * Timeout callback, called every N seconds when 1 or more osd 1568 * requests has been active for more than N seconds. When this 1569 * happens, we ping all OSDs with requests who have timed out to 1570 * ensure any communications channel reset is detected. Reset the 1571 * request timeouts another N seconds in the future as we go. 1572 * Reschedule the timeout event another N seconds in future (unless 1573 * there are no open requests). 1574 */ 1575 static void handle_timeout(struct work_struct *work) 1576 { 1577 struct ceph_osd_client *osdc = 1578 container_of(work, struct ceph_osd_client, timeout_work.work); 1579 struct ceph_osd_request *req; 1580 struct ceph_osd *osd; 1581 unsigned long keepalive = 1582 osdc->client->options->osd_keepalive_timeout * HZ; 1583 struct list_head slow_osds; 1584 dout("timeout\n"); 1585 down_read(&osdc->map_sem); 1586 1587 ceph_monc_request_next_osdmap(&osdc->client->monc); 1588 1589 mutex_lock(&osdc->request_mutex); 1590 1591 /* 1592 * ping osds that are a bit slow. this ensures that if there 1593 * is a break in the TCP connection we will notice, and reopen 1594 * a connection with that osd (from the fault callback). 1595 */ 1596 INIT_LIST_HEAD(&slow_osds); 1597 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { 1598 if (time_before(jiffies, req->r_stamp + keepalive)) 1599 break; 1600 1601 osd = req->r_osd; 1602 BUG_ON(!osd); 1603 dout(" tid %llu is slow, will send keepalive on osd%d\n", 1604 req->r_tid, osd->o_osd); 1605 list_move_tail(&osd->o_keepalive_item, &slow_osds); 1606 } 1607 while (!list_empty(&slow_osds)) { 1608 osd = list_entry(slow_osds.next, struct ceph_osd, 1609 o_keepalive_item); 1610 list_del_init(&osd->o_keepalive_item); 1611 ceph_con_keepalive(&osd->o_con); 1612 } 1613 1614 __schedule_osd_timeout(osdc); 1615 __send_queued(osdc); 1616 mutex_unlock(&osdc->request_mutex); 1617 up_read(&osdc->map_sem); 1618 } 1619 1620 static void handle_osds_timeout(struct work_struct *work) 1621 { 1622 struct ceph_osd_client *osdc = 1623 container_of(work, struct ceph_osd_client, 1624 osds_timeout_work.work); 1625 unsigned long delay = 1626 osdc->client->options->osd_idle_ttl * HZ >> 2; 1627 1628 dout("osds timeout\n"); 1629 down_read(&osdc->map_sem); 1630 remove_old_osds(osdc); 1631 up_read(&osdc->map_sem); 1632 1633 schedule_delayed_work(&osdc->osds_timeout_work, 1634 round_jiffies_relative(delay)); 1635 } 1636 1637 static int ceph_oloc_decode(void **p, void *end, 1638 struct ceph_object_locator *oloc) 1639 { 1640 u8 struct_v, struct_cv; 1641 u32 len; 1642 void *struct_end; 1643 int ret = 0; 1644 1645 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1646 struct_v = ceph_decode_8(p); 1647 struct_cv = ceph_decode_8(p); 1648 if (struct_v < 3) { 1649 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 1650 struct_v, struct_cv); 1651 goto e_inval; 1652 } 1653 if (struct_cv > 6) { 1654 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 1655 struct_v, struct_cv); 1656 goto e_inval; 1657 } 1658 len = ceph_decode_32(p); 1659 ceph_decode_need(p, end, len, e_inval); 1660 struct_end = *p + len; 1661 1662 oloc->pool = ceph_decode_64(p); 1663 *p += 4; /* skip preferred */ 1664 1665 len = ceph_decode_32(p); 1666 if (len > 0) { 1667 pr_warn("ceph_object_locator::key is set\n"); 1668 goto e_inval; 1669 } 1670 1671 if (struct_v >= 5) { 1672 len = ceph_decode_32(p); 1673 if (len > 0) { 1674 pr_warn("ceph_object_locator::nspace is set\n"); 1675 goto e_inval; 1676 } 1677 } 1678 1679 if (struct_v >= 6) { 1680 s64 hash = ceph_decode_64(p); 1681 if (hash != -1) { 1682 pr_warn("ceph_object_locator::hash is set\n"); 1683 goto e_inval; 1684 } 1685 } 1686 1687 /* skip the rest */ 1688 *p = struct_end; 1689 out: 1690 return ret; 1691 1692 e_inval: 1693 ret = -EINVAL; 1694 goto out; 1695 } 1696 1697 static int ceph_redirect_decode(void **p, void *end, 1698 struct ceph_request_redirect *redir) 1699 { 1700 u8 struct_v, struct_cv; 1701 u32 len; 1702 void *struct_end; 1703 int ret; 1704 1705 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1706 struct_v = ceph_decode_8(p); 1707 struct_cv = ceph_decode_8(p); 1708 if (struct_cv > 1) { 1709 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 1710 struct_v, struct_cv); 1711 goto e_inval; 1712 } 1713 len = ceph_decode_32(p); 1714 ceph_decode_need(p, end, len, e_inval); 1715 struct_end = *p + len; 1716 1717 ret = ceph_oloc_decode(p, end, &redir->oloc); 1718 if (ret) 1719 goto out; 1720 1721 len = ceph_decode_32(p); 1722 if (len > 0) { 1723 pr_warn("ceph_request_redirect::object_name is set\n"); 1724 goto e_inval; 1725 } 1726 1727 len = ceph_decode_32(p); 1728 *p += len; /* skip osd_instructions */ 1729 1730 /* skip the rest */ 1731 *p = struct_end; 1732 out: 1733 return ret; 1734 1735 e_inval: 1736 ret = -EINVAL; 1737 goto out; 1738 } 1739 1740 static void complete_request(struct ceph_osd_request *req) 1741 { 1742 complete_all(&req->r_safe_completion); /* fsync waiter */ 1743 } 1744 1745 /* 1746 * handle osd op reply. either call the callback if it is specified, 1747 * or do the completion to wake up the waiting thread. 1748 */ 1749 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, 1750 struct ceph_connection *con) 1751 { 1752 void *p, *end; 1753 struct ceph_osd_request *req; 1754 struct ceph_request_redirect redir; 1755 u64 tid; 1756 int object_len; 1757 unsigned int numops; 1758 int payload_len, flags; 1759 s32 result; 1760 s32 retry_attempt; 1761 struct ceph_pg pg; 1762 int err; 1763 u32 reassert_epoch; 1764 u64 reassert_version; 1765 u32 osdmap_epoch; 1766 int already_completed; 1767 u32 bytes; 1768 unsigned int i; 1769 1770 tid = le64_to_cpu(msg->hdr.tid); 1771 dout("handle_reply %p tid %llu\n", msg, tid); 1772 1773 p = msg->front.iov_base; 1774 end = p + msg->front.iov_len; 1775 1776 ceph_decode_need(&p, end, 4, bad); 1777 object_len = ceph_decode_32(&p); 1778 ceph_decode_need(&p, end, object_len, bad); 1779 p += object_len; 1780 1781 err = ceph_decode_pgid(&p, end, &pg); 1782 if (err) 1783 goto bad; 1784 1785 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad); 1786 flags = ceph_decode_64(&p); 1787 result = ceph_decode_32(&p); 1788 reassert_epoch = ceph_decode_32(&p); 1789 reassert_version = ceph_decode_64(&p); 1790 osdmap_epoch = ceph_decode_32(&p); 1791 1792 /* lookup */ 1793 down_read(&osdc->map_sem); 1794 mutex_lock(&osdc->request_mutex); 1795 req = __lookup_request(osdc, tid); 1796 if (req == NULL) { 1797 dout("handle_reply tid %llu dne\n", tid); 1798 goto bad_mutex; 1799 } 1800 ceph_osdc_get_request(req); 1801 1802 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid, 1803 req, result); 1804 1805 ceph_decode_need(&p, end, 4, bad_put); 1806 numops = ceph_decode_32(&p); 1807 if (numops > CEPH_OSD_MAX_OP) 1808 goto bad_put; 1809 if (numops != req->r_num_ops) 1810 goto bad_put; 1811 payload_len = 0; 1812 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put); 1813 for (i = 0; i < numops; i++) { 1814 struct ceph_osd_op *op = p; 1815 int len; 1816 1817 len = le32_to_cpu(op->payload_len); 1818 req->r_reply_op_len[i] = len; 1819 dout(" op %d has %d bytes\n", i, len); 1820 payload_len += len; 1821 p += sizeof(*op); 1822 } 1823 bytes = le32_to_cpu(msg->hdr.data_len); 1824 if (payload_len != bytes) { 1825 pr_warn("sum of op payload lens %d != data_len %d\n", 1826 payload_len, bytes); 1827 goto bad_put; 1828 } 1829 1830 ceph_decode_need(&p, end, 4 + numops * 4, bad_put); 1831 retry_attempt = ceph_decode_32(&p); 1832 for (i = 0; i < numops; i++) 1833 req->r_reply_op_result[i] = ceph_decode_32(&p); 1834 1835 if (le16_to_cpu(msg->hdr.version) >= 6) { 1836 p += 8 + 4; /* skip replay_version */ 1837 p += 8; /* skip user_version */ 1838 1839 err = ceph_redirect_decode(&p, end, &redir); 1840 if (err) 1841 goto bad_put; 1842 } else { 1843 redir.oloc.pool = -1; 1844 } 1845 1846 if (redir.oloc.pool != -1) { 1847 dout("redirect pool %lld\n", redir.oloc.pool); 1848 1849 __unregister_request(osdc, req); 1850 1851 req->r_target_oloc = redir.oloc; /* struct */ 1852 1853 /* 1854 * Start redirect requests with nofail=true. If 1855 * mapping fails, request will end up on the notarget 1856 * list, waiting for the new osdmap (which can take 1857 * a while), even though the original request mapped 1858 * successfully. In the future we might want to follow 1859 * original request's nofail setting here. 1860 */ 1861 err = __ceph_osdc_start_request(osdc, req, true); 1862 BUG_ON(err); 1863 1864 goto out_unlock; 1865 } 1866 1867 already_completed = req->r_got_reply; 1868 if (!req->r_got_reply) { 1869 req->r_result = result; 1870 dout("handle_reply result %d bytes %d\n", req->r_result, 1871 bytes); 1872 if (req->r_result == 0) 1873 req->r_result = bytes; 1874 1875 /* in case this is a write and we need to replay, */ 1876 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch); 1877 req->r_reassert_version.version = cpu_to_le64(reassert_version); 1878 1879 req->r_got_reply = 1; 1880 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { 1881 dout("handle_reply tid %llu dup ack\n", tid); 1882 goto out_unlock; 1883 } 1884 1885 dout("handle_reply tid %llu flags %d\n", tid, flags); 1886 1887 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) 1888 __register_linger_request(osdc, req); 1889 1890 /* either this is a read, or we got the safe response */ 1891 if (result < 0 || 1892 (flags & CEPH_OSD_FLAG_ONDISK) || 1893 ((flags & CEPH_OSD_FLAG_WRITE) == 0)) 1894 __unregister_request(osdc, req); 1895 1896 mutex_unlock(&osdc->request_mutex); 1897 up_read(&osdc->map_sem); 1898 1899 if (!already_completed) { 1900 if (req->r_unsafe_callback && 1901 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK)) 1902 req->r_unsafe_callback(req, true); 1903 if (req->r_callback) 1904 req->r_callback(req, msg); 1905 else 1906 complete_all(&req->r_completion); 1907 } 1908 1909 if (flags & CEPH_OSD_FLAG_ONDISK) { 1910 if (req->r_unsafe_callback && already_completed) 1911 req->r_unsafe_callback(req, false); 1912 complete_request(req); 1913 } 1914 1915 out: 1916 dout("req=%p req->r_linger=%d\n", req, req->r_linger); 1917 ceph_osdc_put_request(req); 1918 return; 1919 out_unlock: 1920 mutex_unlock(&osdc->request_mutex); 1921 up_read(&osdc->map_sem); 1922 goto out; 1923 1924 bad_put: 1925 req->r_result = -EIO; 1926 __unregister_request(osdc, req); 1927 if (req->r_callback) 1928 req->r_callback(req, msg); 1929 else 1930 complete_all(&req->r_completion); 1931 complete_request(req); 1932 ceph_osdc_put_request(req); 1933 bad_mutex: 1934 mutex_unlock(&osdc->request_mutex); 1935 up_read(&osdc->map_sem); 1936 bad: 1937 pr_err("corrupt osd_op_reply got %d %d\n", 1938 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len)); 1939 ceph_msg_dump(msg); 1940 } 1941 1942 static void reset_changed_osds(struct ceph_osd_client *osdc) 1943 { 1944 struct rb_node *p, *n; 1945 1946 dout("%s %p\n", __func__, osdc); 1947 for (p = rb_first(&osdc->osds); p; p = n) { 1948 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); 1949 1950 n = rb_next(p); 1951 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 1952 memcmp(&osd->o_con.peer_addr, 1953 ceph_osd_addr(osdc->osdmap, 1954 osd->o_osd), 1955 sizeof(struct ceph_entity_addr)) != 0) 1956 __reset_osd(osdc, osd); 1957 } 1958 } 1959 1960 /* 1961 * Requeue requests whose mapping to an OSD has changed. If requests map to 1962 * no osd, request a new map. 1963 * 1964 * Caller should hold map_sem for read. 1965 */ 1966 static void kick_requests(struct ceph_osd_client *osdc, bool force_resend, 1967 bool force_resend_writes) 1968 { 1969 struct ceph_osd_request *req, *nreq; 1970 struct rb_node *p; 1971 int needmap = 0; 1972 int err; 1973 bool force_resend_req; 1974 1975 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "", 1976 force_resend_writes ? " (force resend writes)" : ""); 1977 mutex_lock(&osdc->request_mutex); 1978 for (p = rb_first(&osdc->requests); p; ) { 1979 req = rb_entry(p, struct ceph_osd_request, r_node); 1980 p = rb_next(p); 1981 1982 /* 1983 * For linger requests that have not yet been 1984 * registered, move them to the linger list; they'll 1985 * be sent to the osd in the loop below. Unregister 1986 * the request before re-registering it as a linger 1987 * request to ensure the __map_request() below 1988 * will decide it needs to be sent. 1989 */ 1990 if (req->r_linger && list_empty(&req->r_linger_item)) { 1991 dout("%p tid %llu restart on osd%d\n", 1992 req, req->r_tid, 1993 req->r_osd ? req->r_osd->o_osd : -1); 1994 ceph_osdc_get_request(req); 1995 __unregister_request(osdc, req); 1996 __register_linger_request(osdc, req); 1997 ceph_osdc_put_request(req); 1998 continue; 1999 } 2000 2001 force_resend_req = force_resend || 2002 (force_resend_writes && 2003 req->r_flags & CEPH_OSD_FLAG_WRITE); 2004 err = __map_request(osdc, req, force_resend_req); 2005 if (err < 0) 2006 continue; /* error */ 2007 if (req->r_osd == NULL) { 2008 dout("%p tid %llu maps to no osd\n", req, req->r_tid); 2009 needmap++; /* request a newer map */ 2010 } else if (err > 0) { 2011 if (!req->r_linger) { 2012 dout("%p tid %llu requeued on osd%d\n", req, 2013 req->r_tid, 2014 req->r_osd ? req->r_osd->o_osd : -1); 2015 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2016 } 2017 } 2018 } 2019 2020 list_for_each_entry_safe(req, nreq, &osdc->req_linger, 2021 r_linger_item) { 2022 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); 2023 2024 err = __map_request(osdc, req, 2025 force_resend || force_resend_writes); 2026 dout("__map_request returned %d\n", err); 2027 if (err < 0) 2028 continue; /* hrm! */ 2029 if (req->r_osd == NULL || err > 0) { 2030 if (req->r_osd == NULL) { 2031 dout("lingering %p tid %llu maps to no osd\n", 2032 req, req->r_tid); 2033 /* 2034 * A homeless lingering request makes 2035 * no sense, as it's job is to keep 2036 * a particular OSD connection open. 2037 * Request a newer map and kick the 2038 * request, knowing that it won't be 2039 * resent until we actually get a map 2040 * that can tell us where to send it. 2041 */ 2042 needmap++; 2043 } 2044 2045 dout("kicking lingering %p tid %llu osd%d\n", req, 2046 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1); 2047 __register_request(osdc, req); 2048 __unregister_linger_request(osdc, req); 2049 } 2050 } 2051 reset_changed_osds(osdc); 2052 mutex_unlock(&osdc->request_mutex); 2053 2054 if (needmap) { 2055 dout("%d requests for down osds, need new map\n", needmap); 2056 ceph_monc_request_next_osdmap(&osdc->client->monc); 2057 } 2058 } 2059 2060 2061 /* 2062 * Process updated osd map. 2063 * 2064 * The message contains any number of incremental and full maps, normally 2065 * indicating some sort of topology change in the cluster. Kick requests 2066 * off to different OSDs as needed. 2067 */ 2068 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 2069 { 2070 void *p, *end, *next; 2071 u32 nr_maps, maplen; 2072 u32 epoch; 2073 struct ceph_osdmap *newmap = NULL, *oldmap; 2074 int err; 2075 struct ceph_fsid fsid; 2076 bool was_full; 2077 2078 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); 2079 p = msg->front.iov_base; 2080 end = p + msg->front.iov_len; 2081 2082 /* verify fsid */ 2083 ceph_decode_need(&p, end, sizeof(fsid), bad); 2084 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 2085 if (ceph_check_fsid(osdc->client, &fsid) < 0) 2086 return; 2087 2088 down_write(&osdc->map_sem); 2089 2090 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 2091 2092 /* incremental maps */ 2093 ceph_decode_32_safe(&p, end, nr_maps, bad); 2094 dout(" %d inc maps\n", nr_maps); 2095 while (nr_maps > 0) { 2096 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2097 epoch = ceph_decode_32(&p); 2098 maplen = ceph_decode_32(&p); 2099 ceph_decode_need(&p, end, maplen, bad); 2100 next = p + maplen; 2101 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { 2102 dout("applying incremental map %u len %d\n", 2103 epoch, maplen); 2104 newmap = osdmap_apply_incremental(&p, next, 2105 osdc->osdmap, 2106 &osdc->client->msgr); 2107 if (IS_ERR(newmap)) { 2108 err = PTR_ERR(newmap); 2109 goto bad; 2110 } 2111 BUG_ON(!newmap); 2112 if (newmap != osdc->osdmap) { 2113 ceph_osdmap_destroy(osdc->osdmap); 2114 osdc->osdmap = newmap; 2115 } 2116 was_full = was_full || 2117 ceph_osdmap_flag(osdc->osdmap, 2118 CEPH_OSDMAP_FULL); 2119 kick_requests(osdc, 0, was_full); 2120 } else { 2121 dout("ignoring incremental map %u len %d\n", 2122 epoch, maplen); 2123 } 2124 p = next; 2125 nr_maps--; 2126 } 2127 if (newmap) 2128 goto done; 2129 2130 /* full maps */ 2131 ceph_decode_32_safe(&p, end, nr_maps, bad); 2132 dout(" %d full maps\n", nr_maps); 2133 while (nr_maps) { 2134 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2135 epoch = ceph_decode_32(&p); 2136 maplen = ceph_decode_32(&p); 2137 ceph_decode_need(&p, end, maplen, bad); 2138 if (nr_maps > 1) { 2139 dout("skipping non-latest full map %u len %d\n", 2140 epoch, maplen); 2141 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { 2142 dout("skipping full map %u len %d, " 2143 "older than our %u\n", epoch, maplen, 2144 osdc->osdmap->epoch); 2145 } else { 2146 int skipped_map = 0; 2147 2148 dout("taking full map %u len %d\n", epoch, maplen); 2149 newmap = ceph_osdmap_decode(&p, p+maplen); 2150 if (IS_ERR(newmap)) { 2151 err = PTR_ERR(newmap); 2152 goto bad; 2153 } 2154 BUG_ON(!newmap); 2155 oldmap = osdc->osdmap; 2156 osdc->osdmap = newmap; 2157 if (oldmap) { 2158 if (oldmap->epoch + 1 < newmap->epoch) 2159 skipped_map = 1; 2160 ceph_osdmap_destroy(oldmap); 2161 } 2162 was_full = was_full || 2163 ceph_osdmap_flag(osdc->osdmap, 2164 CEPH_OSDMAP_FULL); 2165 kick_requests(osdc, skipped_map, was_full); 2166 } 2167 p += maplen; 2168 nr_maps--; 2169 } 2170 2171 if (!osdc->osdmap) 2172 goto bad; 2173 done: 2174 downgrade_write(&osdc->map_sem); 2175 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); 2176 2177 /* 2178 * subscribe to subsequent osdmap updates if full to ensure 2179 * we find out when we are no longer full and stop returning 2180 * ENOSPC. 2181 */ 2182 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 2183 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) || 2184 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) 2185 ceph_monc_request_next_osdmap(&osdc->client->monc); 2186 2187 mutex_lock(&osdc->request_mutex); 2188 __send_queued(osdc); 2189 mutex_unlock(&osdc->request_mutex); 2190 up_read(&osdc->map_sem); 2191 wake_up_all(&osdc->client->auth_wq); 2192 return; 2193 2194 bad: 2195 pr_err("osdc handle_map corrupt msg\n"); 2196 ceph_msg_dump(msg); 2197 up_write(&osdc->map_sem); 2198 } 2199 2200 /* 2201 * watch/notify callback event infrastructure 2202 * 2203 * These callbacks are used both for watch and notify operations. 2204 */ 2205 static void __release_event(struct kref *kref) 2206 { 2207 struct ceph_osd_event *event = 2208 container_of(kref, struct ceph_osd_event, kref); 2209 2210 dout("__release_event %p\n", event); 2211 kfree(event); 2212 } 2213 2214 static void get_event(struct ceph_osd_event *event) 2215 { 2216 kref_get(&event->kref); 2217 } 2218 2219 void ceph_osdc_put_event(struct ceph_osd_event *event) 2220 { 2221 kref_put(&event->kref, __release_event); 2222 } 2223 EXPORT_SYMBOL(ceph_osdc_put_event); 2224 2225 static void __insert_event(struct ceph_osd_client *osdc, 2226 struct ceph_osd_event *new) 2227 { 2228 struct rb_node **p = &osdc->event_tree.rb_node; 2229 struct rb_node *parent = NULL; 2230 struct ceph_osd_event *event = NULL; 2231 2232 while (*p) { 2233 parent = *p; 2234 event = rb_entry(parent, struct ceph_osd_event, node); 2235 if (new->cookie < event->cookie) 2236 p = &(*p)->rb_left; 2237 else if (new->cookie > event->cookie) 2238 p = &(*p)->rb_right; 2239 else 2240 BUG(); 2241 } 2242 2243 rb_link_node(&new->node, parent, p); 2244 rb_insert_color(&new->node, &osdc->event_tree); 2245 } 2246 2247 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, 2248 u64 cookie) 2249 { 2250 struct rb_node **p = &osdc->event_tree.rb_node; 2251 struct rb_node *parent = NULL; 2252 struct ceph_osd_event *event = NULL; 2253 2254 while (*p) { 2255 parent = *p; 2256 event = rb_entry(parent, struct ceph_osd_event, node); 2257 if (cookie < event->cookie) 2258 p = &(*p)->rb_left; 2259 else if (cookie > event->cookie) 2260 p = &(*p)->rb_right; 2261 else 2262 return event; 2263 } 2264 return NULL; 2265 } 2266 2267 static void __remove_event(struct ceph_osd_event *event) 2268 { 2269 struct ceph_osd_client *osdc = event->osdc; 2270 2271 if (!RB_EMPTY_NODE(&event->node)) { 2272 dout("__remove_event removed %p\n", event); 2273 rb_erase(&event->node, &osdc->event_tree); 2274 ceph_osdc_put_event(event); 2275 } else { 2276 dout("__remove_event didn't remove %p\n", event); 2277 } 2278 } 2279 2280 int ceph_osdc_create_event(struct ceph_osd_client *osdc, 2281 void (*event_cb)(u64, u64, u8, void *), 2282 void *data, struct ceph_osd_event **pevent) 2283 { 2284 struct ceph_osd_event *event; 2285 2286 event = kmalloc(sizeof(*event), GFP_NOIO); 2287 if (!event) 2288 return -ENOMEM; 2289 2290 dout("create_event %p\n", event); 2291 event->cb = event_cb; 2292 event->one_shot = 0; 2293 event->data = data; 2294 event->osdc = osdc; 2295 INIT_LIST_HEAD(&event->osd_node); 2296 RB_CLEAR_NODE(&event->node); 2297 kref_init(&event->kref); /* one ref for us */ 2298 kref_get(&event->kref); /* one ref for the caller */ 2299 2300 spin_lock(&osdc->event_lock); 2301 event->cookie = ++osdc->event_count; 2302 __insert_event(osdc, event); 2303 spin_unlock(&osdc->event_lock); 2304 2305 *pevent = event; 2306 return 0; 2307 } 2308 EXPORT_SYMBOL(ceph_osdc_create_event); 2309 2310 void ceph_osdc_cancel_event(struct ceph_osd_event *event) 2311 { 2312 struct ceph_osd_client *osdc = event->osdc; 2313 2314 dout("cancel_event %p\n", event); 2315 spin_lock(&osdc->event_lock); 2316 __remove_event(event); 2317 spin_unlock(&osdc->event_lock); 2318 ceph_osdc_put_event(event); /* caller's */ 2319 } 2320 EXPORT_SYMBOL(ceph_osdc_cancel_event); 2321 2322 2323 static void do_event_work(struct work_struct *work) 2324 { 2325 struct ceph_osd_event_work *event_work = 2326 container_of(work, struct ceph_osd_event_work, work); 2327 struct ceph_osd_event *event = event_work->event; 2328 u64 ver = event_work->ver; 2329 u64 notify_id = event_work->notify_id; 2330 u8 opcode = event_work->opcode; 2331 2332 dout("do_event_work completing %p\n", event); 2333 event->cb(ver, notify_id, opcode, event->data); 2334 dout("do_event_work completed %p\n", event); 2335 ceph_osdc_put_event(event); 2336 kfree(event_work); 2337 } 2338 2339 2340 /* 2341 * Process osd watch notifications 2342 */ 2343 static void handle_watch_notify(struct ceph_osd_client *osdc, 2344 struct ceph_msg *msg) 2345 { 2346 void *p, *end; 2347 u8 proto_ver; 2348 u64 cookie, ver, notify_id; 2349 u8 opcode; 2350 struct ceph_osd_event *event; 2351 struct ceph_osd_event_work *event_work; 2352 2353 p = msg->front.iov_base; 2354 end = p + msg->front.iov_len; 2355 2356 ceph_decode_8_safe(&p, end, proto_ver, bad); 2357 ceph_decode_8_safe(&p, end, opcode, bad); 2358 ceph_decode_64_safe(&p, end, cookie, bad); 2359 ceph_decode_64_safe(&p, end, ver, bad); 2360 ceph_decode_64_safe(&p, end, notify_id, bad); 2361 2362 spin_lock(&osdc->event_lock); 2363 event = __find_event(osdc, cookie); 2364 if (event) { 2365 BUG_ON(event->one_shot); 2366 get_event(event); 2367 } 2368 spin_unlock(&osdc->event_lock); 2369 dout("handle_watch_notify cookie %lld ver %lld event %p\n", 2370 cookie, ver, event); 2371 if (event) { 2372 event_work = kmalloc(sizeof(*event_work), GFP_NOIO); 2373 if (!event_work) { 2374 pr_err("couldn't allocate event_work\n"); 2375 ceph_osdc_put_event(event); 2376 return; 2377 } 2378 INIT_WORK(&event_work->work, do_event_work); 2379 event_work->event = event; 2380 event_work->ver = ver; 2381 event_work->notify_id = notify_id; 2382 event_work->opcode = opcode; 2383 2384 queue_work(osdc->notify_wq, &event_work->work); 2385 } 2386 2387 return; 2388 2389 bad: 2390 pr_err("osdc handle_watch_notify corrupt msg\n"); 2391 } 2392 2393 /* 2394 * build new request AND message 2395 * 2396 */ 2397 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 2398 struct ceph_snap_context *snapc, u64 snap_id, 2399 struct timespec *mtime) 2400 { 2401 struct ceph_msg *msg = req->r_request; 2402 void *p; 2403 size_t msg_size; 2404 int flags = req->r_flags; 2405 u64 data_len; 2406 unsigned int i; 2407 2408 req->r_snapid = snap_id; 2409 req->r_snapc = ceph_get_snap_context(snapc); 2410 2411 /* encode request */ 2412 msg->hdr.version = cpu_to_le16(4); 2413 2414 p = msg->front.iov_base; 2415 ceph_encode_32(&p, 1); /* client_inc is always 1 */ 2416 req->r_request_osdmap_epoch = p; 2417 p += 4; 2418 req->r_request_flags = p; 2419 p += 4; 2420 if (req->r_flags & CEPH_OSD_FLAG_WRITE) 2421 ceph_encode_timespec(p, mtime); 2422 p += sizeof(struct ceph_timespec); 2423 req->r_request_reassert_version = p; 2424 p += sizeof(struct ceph_eversion); /* will get filled in */ 2425 2426 /* oloc */ 2427 ceph_encode_8(&p, 4); 2428 ceph_encode_8(&p, 4); 2429 ceph_encode_32(&p, 8 + 4 + 4); 2430 req->r_request_pool = p; 2431 p += 8; 2432 ceph_encode_32(&p, -1); /* preferred */ 2433 ceph_encode_32(&p, 0); /* key len */ 2434 2435 ceph_encode_8(&p, 1); 2436 req->r_request_pgid = p; 2437 p += 8 + 4; 2438 ceph_encode_32(&p, -1); /* preferred */ 2439 2440 /* oid */ 2441 ceph_encode_32(&p, req->r_base_oid.name_len); 2442 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len); 2443 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len, 2444 req->r_base_oid.name, req->r_base_oid.name_len); 2445 p += req->r_base_oid.name_len; 2446 2447 /* ops--can imply data */ 2448 ceph_encode_16(&p, (u16)req->r_num_ops); 2449 data_len = 0; 2450 for (i = 0; i < req->r_num_ops; i++) { 2451 data_len += osd_req_encode_op(req, p, i); 2452 p += sizeof(struct ceph_osd_op); 2453 } 2454 2455 /* snaps */ 2456 ceph_encode_64(&p, req->r_snapid); 2457 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0); 2458 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0); 2459 if (req->r_snapc) { 2460 for (i = 0; i < snapc->num_snaps; i++) { 2461 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2462 } 2463 } 2464 2465 req->r_request_attempts = p; 2466 p += 4; 2467 2468 /* data */ 2469 if (flags & CEPH_OSD_FLAG_WRITE) { 2470 u16 data_off; 2471 2472 /* 2473 * The header "data_off" is a hint to the receiver 2474 * allowing it to align received data into its 2475 * buffers such that there's no need to re-copy 2476 * it before writing it to disk (direct I/O). 2477 */ 2478 data_off = (u16) (off & 0xffff); 2479 req->r_request->hdr.data_off = cpu_to_le16(data_off); 2480 } 2481 req->r_request->hdr.data_len = cpu_to_le32(data_len); 2482 2483 BUG_ON(p > msg->front.iov_base + msg->front.iov_len); 2484 msg_size = p - msg->front.iov_base; 2485 msg->front.iov_len = msg_size; 2486 msg->hdr.front_len = cpu_to_le32(msg_size); 2487 2488 dout("build_request msg_size was %d\n", (int)msg_size); 2489 } 2490 EXPORT_SYMBOL(ceph_osdc_build_request); 2491 2492 /* 2493 * Register request, send initial attempt. 2494 */ 2495 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 2496 struct ceph_osd_request *req, 2497 bool nofail) 2498 { 2499 int rc; 2500 2501 down_read(&osdc->map_sem); 2502 mutex_lock(&osdc->request_mutex); 2503 2504 rc = __ceph_osdc_start_request(osdc, req, nofail); 2505 2506 mutex_unlock(&osdc->request_mutex); 2507 up_read(&osdc->map_sem); 2508 2509 return rc; 2510 } 2511 EXPORT_SYMBOL(ceph_osdc_start_request); 2512 2513 /* 2514 * Unregister a registered request. The request is not completed (i.e. 2515 * no callbacks or wakeups) - higher layers are supposed to know what 2516 * they are canceling. 2517 */ 2518 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 2519 { 2520 struct ceph_osd_client *osdc = req->r_osdc; 2521 2522 mutex_lock(&osdc->request_mutex); 2523 if (req->r_linger) 2524 __unregister_linger_request(osdc, req); 2525 __unregister_request(osdc, req); 2526 mutex_unlock(&osdc->request_mutex); 2527 2528 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid); 2529 } 2530 EXPORT_SYMBOL(ceph_osdc_cancel_request); 2531 2532 /* 2533 * wait for a request to complete 2534 */ 2535 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 2536 struct ceph_osd_request *req) 2537 { 2538 int rc; 2539 2540 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 2541 2542 rc = wait_for_completion_interruptible(&req->r_completion); 2543 if (rc < 0) { 2544 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid); 2545 ceph_osdc_cancel_request(req); 2546 complete_request(req); 2547 return rc; 2548 } 2549 2550 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid, 2551 req->r_result); 2552 return req->r_result; 2553 } 2554 EXPORT_SYMBOL(ceph_osdc_wait_request); 2555 2556 /* 2557 * sync - wait for all in-flight requests to flush. avoid starvation. 2558 */ 2559 void ceph_osdc_sync(struct ceph_osd_client *osdc) 2560 { 2561 struct ceph_osd_request *req; 2562 u64 last_tid, next_tid = 0; 2563 2564 mutex_lock(&osdc->request_mutex); 2565 last_tid = osdc->last_tid; 2566 while (1) { 2567 req = __lookup_request_ge(osdc, next_tid); 2568 if (!req) 2569 break; 2570 if (req->r_tid > last_tid) 2571 break; 2572 2573 next_tid = req->r_tid + 1; 2574 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) 2575 continue; 2576 2577 ceph_osdc_get_request(req); 2578 mutex_unlock(&osdc->request_mutex); 2579 dout("sync waiting on tid %llu (last is %llu)\n", 2580 req->r_tid, last_tid); 2581 wait_for_completion(&req->r_safe_completion); 2582 mutex_lock(&osdc->request_mutex); 2583 ceph_osdc_put_request(req); 2584 } 2585 mutex_unlock(&osdc->request_mutex); 2586 dout("sync done (thru tid %llu)\n", last_tid); 2587 } 2588 EXPORT_SYMBOL(ceph_osdc_sync); 2589 2590 /* 2591 * Call all pending notify callbacks - for use after a watch is 2592 * unregistered, to make sure no more callbacks for it will be invoked 2593 */ 2594 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 2595 { 2596 flush_workqueue(osdc->notify_wq); 2597 } 2598 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 2599 2600 2601 /* 2602 * init, shutdown 2603 */ 2604 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 2605 { 2606 int err; 2607 2608 dout("init\n"); 2609 osdc->client = client; 2610 osdc->osdmap = NULL; 2611 init_rwsem(&osdc->map_sem); 2612 init_completion(&osdc->map_waiters); 2613 osdc->last_requested_map = 0; 2614 mutex_init(&osdc->request_mutex); 2615 osdc->last_tid = 0; 2616 osdc->osds = RB_ROOT; 2617 INIT_LIST_HEAD(&osdc->osd_lru); 2618 osdc->requests = RB_ROOT; 2619 INIT_LIST_HEAD(&osdc->req_lru); 2620 INIT_LIST_HEAD(&osdc->req_unsent); 2621 INIT_LIST_HEAD(&osdc->req_notarget); 2622 INIT_LIST_HEAD(&osdc->req_linger); 2623 osdc->num_requests = 0; 2624 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 2625 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 2626 spin_lock_init(&osdc->event_lock); 2627 osdc->event_tree = RB_ROOT; 2628 osdc->event_count = 0; 2629 2630 schedule_delayed_work(&osdc->osds_timeout_work, 2631 round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); 2632 2633 err = -ENOMEM; 2634 osdc->req_mempool = mempool_create_kmalloc_pool(10, 2635 sizeof(struct ceph_osd_request)); 2636 if (!osdc->req_mempool) 2637 goto out; 2638 2639 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 2640 OSD_OP_FRONT_LEN, 10, true, 2641 "osd_op"); 2642 if (err < 0) 2643 goto out_mempool; 2644 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 2645 OSD_OPREPLY_FRONT_LEN, 10, true, 2646 "osd_op_reply"); 2647 if (err < 0) 2648 goto out_msgpool; 2649 2650 err = -ENOMEM; 2651 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 2652 if (!osdc->notify_wq) 2653 goto out_msgpool_reply; 2654 2655 return 0; 2656 2657 out_msgpool_reply: 2658 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2659 out_msgpool: 2660 ceph_msgpool_destroy(&osdc->msgpool_op); 2661 out_mempool: 2662 mempool_destroy(osdc->req_mempool); 2663 out: 2664 return err; 2665 } 2666 2667 void ceph_osdc_stop(struct ceph_osd_client *osdc) 2668 { 2669 flush_workqueue(osdc->notify_wq); 2670 destroy_workqueue(osdc->notify_wq); 2671 cancel_delayed_work_sync(&osdc->timeout_work); 2672 cancel_delayed_work_sync(&osdc->osds_timeout_work); 2673 if (osdc->osdmap) { 2674 ceph_osdmap_destroy(osdc->osdmap); 2675 osdc->osdmap = NULL; 2676 } 2677 remove_all_osds(osdc); 2678 mempool_destroy(osdc->req_mempool); 2679 ceph_msgpool_destroy(&osdc->msgpool_op); 2680 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2681 } 2682 2683 /* 2684 * Read some contiguous pages. If we cross a stripe boundary, shorten 2685 * *plen. Return number of bytes read, or error. 2686 */ 2687 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 2688 struct ceph_vino vino, struct ceph_file_layout *layout, 2689 u64 off, u64 *plen, 2690 u32 truncate_seq, u64 truncate_size, 2691 struct page **pages, int num_pages, int page_align) 2692 { 2693 struct ceph_osd_request *req; 2694 int rc = 0; 2695 2696 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 2697 vino.snap, off, *plen); 2698 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 2699 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 2700 NULL, truncate_seq, truncate_size, 2701 false); 2702 if (IS_ERR(req)) 2703 return PTR_ERR(req); 2704 2705 /* it may be a short read due to an object boundary */ 2706 2707 osd_req_op_extent_osd_data_pages(req, 0, 2708 pages, *plen, page_align, false, false); 2709 2710 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 2711 off, *plen, *plen, page_align); 2712 2713 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL); 2714 2715 rc = ceph_osdc_start_request(osdc, req, false); 2716 if (!rc) 2717 rc = ceph_osdc_wait_request(osdc, req); 2718 2719 ceph_osdc_put_request(req); 2720 dout("readpages result %d\n", rc); 2721 return rc; 2722 } 2723 EXPORT_SYMBOL(ceph_osdc_readpages); 2724 2725 /* 2726 * do a synchronous write on N pages 2727 */ 2728 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 2729 struct ceph_file_layout *layout, 2730 struct ceph_snap_context *snapc, 2731 u64 off, u64 len, 2732 u32 truncate_seq, u64 truncate_size, 2733 struct timespec *mtime, 2734 struct page **pages, int num_pages) 2735 { 2736 struct ceph_osd_request *req; 2737 int rc = 0; 2738 int page_align = off & ~PAGE_MASK; 2739 2740 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */ 2741 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 2742 CEPH_OSD_OP_WRITE, 2743 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 2744 snapc, truncate_seq, truncate_size, 2745 true); 2746 if (IS_ERR(req)) 2747 return PTR_ERR(req); 2748 2749 /* it may be a short write due to an object boundary */ 2750 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 2751 false, false); 2752 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 2753 2754 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime); 2755 2756 rc = ceph_osdc_start_request(osdc, req, true); 2757 if (!rc) 2758 rc = ceph_osdc_wait_request(osdc, req); 2759 2760 ceph_osdc_put_request(req); 2761 if (rc == 0) 2762 rc = len; 2763 dout("writepages result %d\n", rc); 2764 return rc; 2765 } 2766 EXPORT_SYMBOL(ceph_osdc_writepages); 2767 2768 int ceph_osdc_setup(void) 2769 { 2770 BUG_ON(ceph_osd_request_cache); 2771 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", 2772 sizeof (struct ceph_osd_request), 2773 __alignof__(struct ceph_osd_request), 2774 0, NULL); 2775 2776 return ceph_osd_request_cache ? 0 : -ENOMEM; 2777 } 2778 EXPORT_SYMBOL(ceph_osdc_setup); 2779 2780 void ceph_osdc_cleanup(void) 2781 { 2782 BUG_ON(!ceph_osd_request_cache); 2783 kmem_cache_destroy(ceph_osd_request_cache); 2784 ceph_osd_request_cache = NULL; 2785 } 2786 EXPORT_SYMBOL(ceph_osdc_cleanup); 2787 2788 /* 2789 * handle incoming message 2790 */ 2791 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 2792 { 2793 struct ceph_osd *osd = con->private; 2794 struct ceph_osd_client *osdc; 2795 int type = le16_to_cpu(msg->hdr.type); 2796 2797 if (!osd) 2798 goto out; 2799 osdc = osd->o_osdc; 2800 2801 switch (type) { 2802 case CEPH_MSG_OSD_MAP: 2803 ceph_osdc_handle_map(osdc, msg); 2804 break; 2805 case CEPH_MSG_OSD_OPREPLY: 2806 handle_reply(osdc, msg, con); 2807 break; 2808 case CEPH_MSG_WATCH_NOTIFY: 2809 handle_watch_notify(osdc, msg); 2810 break; 2811 2812 default: 2813 pr_err("received unknown message type %d %s\n", type, 2814 ceph_msg_type_name(type)); 2815 } 2816 out: 2817 ceph_msg_put(msg); 2818 } 2819 2820 /* 2821 * lookup and return message for incoming reply. set up reply message 2822 * pages. 2823 */ 2824 static struct ceph_msg *get_reply(struct ceph_connection *con, 2825 struct ceph_msg_header *hdr, 2826 int *skip) 2827 { 2828 struct ceph_osd *osd = con->private; 2829 struct ceph_osd_client *osdc = osd->o_osdc; 2830 struct ceph_msg *m; 2831 struct ceph_osd_request *req; 2832 int front_len = le32_to_cpu(hdr->front_len); 2833 int data_len = le32_to_cpu(hdr->data_len); 2834 u64 tid; 2835 2836 tid = le64_to_cpu(hdr->tid); 2837 mutex_lock(&osdc->request_mutex); 2838 req = __lookup_request(osdc, tid); 2839 if (!req) { 2840 *skip = 1; 2841 m = NULL; 2842 dout("get_reply unknown tid %llu from osd%d\n", tid, 2843 osd->o_osd); 2844 goto out; 2845 } 2846 2847 if (req->r_reply->con) 2848 dout("%s revoking msg %p from old con %p\n", __func__, 2849 req->r_reply, req->r_reply->con); 2850 ceph_msg_revoke_incoming(req->r_reply); 2851 2852 if (front_len > req->r_reply->front_alloc_len) { 2853 pr_warn("get_reply front %d > preallocated %d (%u#%llu)\n", 2854 front_len, req->r_reply->front_alloc_len, 2855 (unsigned int)con->peer_name.type, 2856 le64_to_cpu(con->peer_name.num)); 2857 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 2858 false); 2859 if (!m) 2860 goto out; 2861 ceph_msg_put(req->r_reply); 2862 req->r_reply = m; 2863 } 2864 m = ceph_msg_get(req->r_reply); 2865 2866 if (data_len > 0) { 2867 struct ceph_osd_data *osd_data; 2868 2869 /* 2870 * XXX This is assuming there is only one op containing 2871 * XXX page data. Probably OK for reads, but this 2872 * XXX ought to be done more generally. 2873 */ 2874 osd_data = osd_req_op_extent_osd_data(req, 0); 2875 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 2876 if (osd_data->pages && 2877 unlikely(osd_data->length < data_len)) { 2878 2879 pr_warn("tid %lld reply has %d bytes we had only %llu bytes ready\n", 2880 tid, data_len, osd_data->length); 2881 *skip = 1; 2882 ceph_msg_put(m); 2883 m = NULL; 2884 goto out; 2885 } 2886 } 2887 } 2888 *skip = 0; 2889 dout("get_reply tid %lld %p\n", tid, m); 2890 2891 out: 2892 mutex_unlock(&osdc->request_mutex); 2893 return m; 2894 2895 } 2896 2897 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 2898 struct ceph_msg_header *hdr, 2899 int *skip) 2900 { 2901 struct ceph_osd *osd = con->private; 2902 int type = le16_to_cpu(hdr->type); 2903 int front = le32_to_cpu(hdr->front_len); 2904 2905 *skip = 0; 2906 switch (type) { 2907 case CEPH_MSG_OSD_MAP: 2908 case CEPH_MSG_WATCH_NOTIFY: 2909 return ceph_msg_new(type, front, GFP_NOFS, false); 2910 case CEPH_MSG_OSD_OPREPLY: 2911 return get_reply(con, hdr, skip); 2912 default: 2913 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, 2914 osd->o_osd); 2915 *skip = 1; 2916 return NULL; 2917 } 2918 } 2919 2920 /* 2921 * Wrappers to refcount containing ceph_osd struct 2922 */ 2923 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 2924 { 2925 struct ceph_osd *osd = con->private; 2926 if (get_osd(osd)) 2927 return con; 2928 return NULL; 2929 } 2930 2931 static void put_osd_con(struct ceph_connection *con) 2932 { 2933 struct ceph_osd *osd = con->private; 2934 put_osd(osd); 2935 } 2936 2937 /* 2938 * authentication 2939 */ 2940 /* 2941 * Note: returned pointer is the address of a structure that's 2942 * managed separately. Caller must *not* attempt to free it. 2943 */ 2944 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 2945 int *proto, int force_new) 2946 { 2947 struct ceph_osd *o = con->private; 2948 struct ceph_osd_client *osdc = o->o_osdc; 2949 struct ceph_auth_client *ac = osdc->client->monc.auth; 2950 struct ceph_auth_handshake *auth = &o->o_auth; 2951 2952 if (force_new && auth->authorizer) { 2953 ceph_auth_destroy_authorizer(ac, auth->authorizer); 2954 auth->authorizer = NULL; 2955 } 2956 if (!auth->authorizer) { 2957 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2958 auth); 2959 if (ret) 2960 return ERR_PTR(ret); 2961 } else { 2962 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2963 auth); 2964 if (ret) 2965 return ERR_PTR(ret); 2966 } 2967 *proto = ac->protocol; 2968 2969 return auth; 2970 } 2971 2972 2973 static int verify_authorizer_reply(struct ceph_connection *con, int len) 2974 { 2975 struct ceph_osd *o = con->private; 2976 struct ceph_osd_client *osdc = o->o_osdc; 2977 struct ceph_auth_client *ac = osdc->client->monc.auth; 2978 2979 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); 2980 } 2981 2982 static int invalidate_authorizer(struct ceph_connection *con) 2983 { 2984 struct ceph_osd *o = con->private; 2985 struct ceph_osd_client *osdc = o->o_osdc; 2986 struct ceph_auth_client *ac = osdc->client->monc.auth; 2987 2988 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 2989 return ceph_monc_validate_auth(&osdc->client->monc); 2990 } 2991 2992 static int sign_message(struct ceph_connection *con, struct ceph_msg *msg) 2993 { 2994 struct ceph_osd *o = con->private; 2995 struct ceph_auth_handshake *auth = &o->o_auth; 2996 return ceph_auth_sign_message(auth, msg); 2997 } 2998 2999 static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg) 3000 { 3001 struct ceph_osd *o = con->private; 3002 struct ceph_auth_handshake *auth = &o->o_auth; 3003 return ceph_auth_check_message_signature(auth, msg); 3004 } 3005 3006 static const struct ceph_connection_operations osd_con_ops = { 3007 .get = get_osd_con, 3008 .put = put_osd_con, 3009 .dispatch = dispatch, 3010 .get_authorizer = get_authorizer, 3011 .verify_authorizer_reply = verify_authorizer_reply, 3012 .invalidate_authorizer = invalidate_authorizer, 3013 .alloc_msg = alloc_msg, 3014 .sign_message = sign_message, 3015 .check_message_signature = check_message_signature, 3016 .fault = osd_reset, 3017 }; 3018