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 case CEPH_OSD_OP_WRITEFULL: 289 ceph_osd_data_release(&op->extent.osd_data); 290 break; 291 case CEPH_OSD_OP_CALL: 292 ceph_osd_data_release(&op->cls.request_info); 293 ceph_osd_data_release(&op->cls.request_data); 294 ceph_osd_data_release(&op->cls.response_data); 295 break; 296 case CEPH_OSD_OP_SETXATTR: 297 case CEPH_OSD_OP_CMPXATTR: 298 ceph_osd_data_release(&op->xattr.osd_data); 299 break; 300 case CEPH_OSD_OP_STAT: 301 ceph_osd_data_release(&op->raw_data_in); 302 break; 303 default: 304 break; 305 } 306 } 307 308 /* 309 * requests 310 */ 311 static void ceph_osdc_release_request(struct kref *kref) 312 { 313 struct ceph_osd_request *req = container_of(kref, 314 struct ceph_osd_request, r_kref); 315 unsigned int which; 316 317 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 318 req->r_request, req->r_reply); 319 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 320 WARN_ON(!list_empty(&req->r_req_lru_item)); 321 WARN_ON(!list_empty(&req->r_osd_item)); 322 WARN_ON(!list_empty(&req->r_linger_item)); 323 WARN_ON(!list_empty(&req->r_linger_osd_item)); 324 WARN_ON(req->r_osd); 325 326 if (req->r_request) 327 ceph_msg_put(req->r_request); 328 if (req->r_reply) { 329 ceph_msg_revoke_incoming(req->r_reply); 330 ceph_msg_put(req->r_reply); 331 } 332 333 for (which = 0; which < req->r_num_ops; which++) 334 osd_req_op_data_release(req, which); 335 336 ceph_put_snap_context(req->r_snapc); 337 if (req->r_mempool) 338 mempool_free(req, req->r_osdc->req_mempool); 339 else 340 kmem_cache_free(ceph_osd_request_cache, req); 341 342 } 343 344 void ceph_osdc_get_request(struct ceph_osd_request *req) 345 { 346 dout("%s %p (was %d)\n", __func__, req, 347 atomic_read(&req->r_kref.refcount)); 348 kref_get(&req->r_kref); 349 } 350 EXPORT_SYMBOL(ceph_osdc_get_request); 351 352 void ceph_osdc_put_request(struct ceph_osd_request *req) 353 { 354 dout("%s %p (was %d)\n", __func__, req, 355 atomic_read(&req->r_kref.refcount)); 356 kref_put(&req->r_kref, ceph_osdc_release_request); 357 } 358 EXPORT_SYMBOL(ceph_osdc_put_request); 359 360 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 361 struct ceph_snap_context *snapc, 362 unsigned int num_ops, 363 bool use_mempool, 364 gfp_t gfp_flags) 365 { 366 struct ceph_osd_request *req; 367 struct ceph_msg *msg; 368 size_t msg_size; 369 370 BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX); 371 BUG_ON(num_ops > CEPH_OSD_MAX_OP); 372 373 msg_size = 4 + 4 + 8 + 8 + 4+8; 374 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */ 375 msg_size += 1 + 8 + 4 + 4; /* pg_t */ 376 msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */ 377 msg_size += 2 + num_ops*sizeof(struct ceph_osd_op); 378 msg_size += 8; /* snapid */ 379 msg_size += 8; /* snap_seq */ 380 msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */ 381 msg_size += 4; 382 383 if (use_mempool) { 384 req = mempool_alloc(osdc->req_mempool, gfp_flags); 385 memset(req, 0, sizeof(*req)); 386 } else { 387 req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags); 388 } 389 if (req == NULL) 390 return NULL; 391 392 req->r_osdc = osdc; 393 req->r_mempool = use_mempool; 394 req->r_num_ops = num_ops; 395 396 kref_init(&req->r_kref); 397 init_completion(&req->r_completion); 398 init_completion(&req->r_safe_completion); 399 RB_CLEAR_NODE(&req->r_node); 400 INIT_LIST_HEAD(&req->r_unsafe_item); 401 INIT_LIST_HEAD(&req->r_linger_item); 402 INIT_LIST_HEAD(&req->r_linger_osd_item); 403 INIT_LIST_HEAD(&req->r_req_lru_item); 404 INIT_LIST_HEAD(&req->r_osd_item); 405 406 req->r_base_oloc.pool = -1; 407 req->r_target_oloc.pool = -1; 408 409 /* create reply message */ 410 if (use_mempool) 411 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 412 else 413 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, 414 OSD_OPREPLY_FRONT_LEN, gfp_flags, true); 415 if (!msg) { 416 ceph_osdc_put_request(req); 417 return NULL; 418 } 419 req->r_reply = msg; 420 421 /* create request message; allow space for oid */ 422 if (use_mempool) 423 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 424 else 425 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true); 426 if (!msg) { 427 ceph_osdc_put_request(req); 428 return NULL; 429 } 430 431 memset(msg->front.iov_base, 0, msg->front.iov_len); 432 433 req->r_request = msg; 434 435 return req; 436 } 437 EXPORT_SYMBOL(ceph_osdc_alloc_request); 438 439 static bool osd_req_opcode_valid(u16 opcode) 440 { 441 switch (opcode) { 442 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 443 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 444 #undef GENERATE_CASE 445 default: 446 return false; 447 } 448 } 449 450 /* 451 * This is an osd op init function for opcodes that have no data or 452 * other information associated with them. It also serves as a 453 * common init routine for all the other init functions, below. 454 */ 455 static struct ceph_osd_req_op * 456 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 457 u16 opcode, u32 flags) 458 { 459 struct ceph_osd_req_op *op; 460 461 BUG_ON(which >= osd_req->r_num_ops); 462 BUG_ON(!osd_req_opcode_valid(opcode)); 463 464 op = &osd_req->r_ops[which]; 465 memset(op, 0, sizeof (*op)); 466 op->op = opcode; 467 op->flags = flags; 468 469 return op; 470 } 471 472 void osd_req_op_init(struct ceph_osd_request *osd_req, 473 unsigned int which, u16 opcode, u32 flags) 474 { 475 (void)_osd_req_op_init(osd_req, which, opcode, flags); 476 } 477 EXPORT_SYMBOL(osd_req_op_init); 478 479 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 480 unsigned int which, u16 opcode, 481 u64 offset, u64 length, 482 u64 truncate_size, u32 truncate_seq) 483 { 484 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 485 opcode, 0); 486 size_t payload_len = 0; 487 488 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 489 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 490 opcode != CEPH_OSD_OP_TRUNCATE); 491 492 op->extent.offset = offset; 493 op->extent.length = length; 494 op->extent.truncate_size = truncate_size; 495 op->extent.truncate_seq = truncate_seq; 496 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 497 payload_len += length; 498 499 op->payload_len = payload_len; 500 } 501 EXPORT_SYMBOL(osd_req_op_extent_init); 502 503 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 504 unsigned int which, u64 length) 505 { 506 struct ceph_osd_req_op *op; 507 u64 previous; 508 509 BUG_ON(which >= osd_req->r_num_ops); 510 op = &osd_req->r_ops[which]; 511 previous = op->extent.length; 512 513 if (length == previous) 514 return; /* Nothing to do */ 515 BUG_ON(length > previous); 516 517 op->extent.length = length; 518 op->payload_len -= previous - length; 519 } 520 EXPORT_SYMBOL(osd_req_op_extent_update); 521 522 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 523 u16 opcode, const char *class, const char *method) 524 { 525 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 526 opcode, 0); 527 struct ceph_pagelist *pagelist; 528 size_t payload_len = 0; 529 size_t size; 530 531 BUG_ON(opcode != CEPH_OSD_OP_CALL); 532 533 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 534 BUG_ON(!pagelist); 535 ceph_pagelist_init(pagelist); 536 537 op->cls.class_name = class; 538 size = strlen(class); 539 BUG_ON(size > (size_t) U8_MAX); 540 op->cls.class_len = size; 541 ceph_pagelist_append(pagelist, class, size); 542 payload_len += size; 543 544 op->cls.method_name = method; 545 size = strlen(method); 546 BUG_ON(size > (size_t) U8_MAX); 547 op->cls.method_len = size; 548 ceph_pagelist_append(pagelist, method, size); 549 payload_len += size; 550 551 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 552 553 op->cls.argc = 0; /* currently unused */ 554 555 op->payload_len = payload_len; 556 } 557 EXPORT_SYMBOL(osd_req_op_cls_init); 558 559 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 560 u16 opcode, const char *name, const void *value, 561 size_t size, u8 cmp_op, u8 cmp_mode) 562 { 563 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 564 opcode, 0); 565 struct ceph_pagelist *pagelist; 566 size_t payload_len; 567 568 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 569 570 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 571 if (!pagelist) 572 return -ENOMEM; 573 574 ceph_pagelist_init(pagelist); 575 576 payload_len = strlen(name); 577 op->xattr.name_len = payload_len; 578 ceph_pagelist_append(pagelist, name, payload_len); 579 580 op->xattr.value_len = size; 581 ceph_pagelist_append(pagelist, value, size); 582 payload_len += size; 583 584 op->xattr.cmp_op = cmp_op; 585 op->xattr.cmp_mode = cmp_mode; 586 587 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 588 op->payload_len = payload_len; 589 return 0; 590 } 591 EXPORT_SYMBOL(osd_req_op_xattr_init); 592 593 void osd_req_op_watch_init(struct ceph_osd_request *osd_req, 594 unsigned int which, u16 opcode, 595 u64 cookie, u64 version, int flag) 596 { 597 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 598 opcode, 0); 599 600 BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH); 601 602 op->watch.cookie = cookie; 603 op->watch.ver = version; 604 if (opcode == CEPH_OSD_OP_WATCH && flag) 605 op->watch.flag = (u8)1; 606 } 607 EXPORT_SYMBOL(osd_req_op_watch_init); 608 609 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 610 unsigned int which, 611 u64 expected_object_size, 612 u64 expected_write_size) 613 { 614 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 615 CEPH_OSD_OP_SETALLOCHINT, 616 0); 617 618 op->alloc_hint.expected_object_size = expected_object_size; 619 op->alloc_hint.expected_write_size = expected_write_size; 620 621 /* 622 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 623 * not worth a feature bit. Set FAILOK per-op flag to make 624 * sure older osds don't trip over an unsupported opcode. 625 */ 626 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 627 } 628 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 629 630 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 631 struct ceph_osd_data *osd_data) 632 { 633 u64 length = ceph_osd_data_length(osd_data); 634 635 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 636 BUG_ON(length > (u64) SIZE_MAX); 637 if (length) 638 ceph_msg_data_add_pages(msg, osd_data->pages, 639 length, osd_data->alignment); 640 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 641 BUG_ON(!length); 642 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 643 #ifdef CONFIG_BLOCK 644 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 645 ceph_msg_data_add_bio(msg, osd_data->bio, length); 646 #endif 647 } else { 648 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 649 } 650 } 651 652 static u64 osd_req_encode_op(struct ceph_osd_request *req, 653 struct ceph_osd_op *dst, unsigned int which) 654 { 655 struct ceph_osd_req_op *src; 656 struct ceph_osd_data *osd_data; 657 u64 request_data_len = 0; 658 u64 data_length; 659 660 BUG_ON(which >= req->r_num_ops); 661 src = &req->r_ops[which]; 662 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 663 pr_err("unrecognized osd opcode %d\n", src->op); 664 665 return 0; 666 } 667 668 switch (src->op) { 669 case CEPH_OSD_OP_STAT: 670 osd_data = &src->raw_data_in; 671 ceph_osdc_msg_data_add(req->r_reply, osd_data); 672 break; 673 case CEPH_OSD_OP_READ: 674 case CEPH_OSD_OP_WRITE: 675 case CEPH_OSD_OP_WRITEFULL: 676 case CEPH_OSD_OP_ZERO: 677 case CEPH_OSD_OP_TRUNCATE: 678 if (src->op == CEPH_OSD_OP_WRITE || 679 src->op == CEPH_OSD_OP_WRITEFULL) 680 request_data_len = src->extent.length; 681 dst->extent.offset = cpu_to_le64(src->extent.offset); 682 dst->extent.length = cpu_to_le64(src->extent.length); 683 dst->extent.truncate_size = 684 cpu_to_le64(src->extent.truncate_size); 685 dst->extent.truncate_seq = 686 cpu_to_le32(src->extent.truncate_seq); 687 osd_data = &src->extent.osd_data; 688 if (src->op == CEPH_OSD_OP_WRITE || 689 src->op == CEPH_OSD_OP_WRITEFULL) 690 ceph_osdc_msg_data_add(req->r_request, osd_data); 691 else 692 ceph_osdc_msg_data_add(req->r_reply, osd_data); 693 break; 694 case CEPH_OSD_OP_CALL: 695 dst->cls.class_len = src->cls.class_len; 696 dst->cls.method_len = src->cls.method_len; 697 osd_data = &src->cls.request_info; 698 ceph_osdc_msg_data_add(req->r_request, osd_data); 699 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST); 700 request_data_len = osd_data->pagelist->length; 701 702 osd_data = &src->cls.request_data; 703 data_length = ceph_osd_data_length(osd_data); 704 if (data_length) { 705 BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE); 706 dst->cls.indata_len = cpu_to_le32(data_length); 707 ceph_osdc_msg_data_add(req->r_request, osd_data); 708 src->payload_len += data_length; 709 request_data_len += data_length; 710 } 711 osd_data = &src->cls.response_data; 712 ceph_osdc_msg_data_add(req->r_reply, osd_data); 713 break; 714 case CEPH_OSD_OP_STARTSYNC: 715 break; 716 case CEPH_OSD_OP_NOTIFY_ACK: 717 case CEPH_OSD_OP_WATCH: 718 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 719 dst->watch.ver = cpu_to_le64(src->watch.ver); 720 dst->watch.flag = src->watch.flag; 721 break; 722 case CEPH_OSD_OP_SETALLOCHINT: 723 dst->alloc_hint.expected_object_size = 724 cpu_to_le64(src->alloc_hint.expected_object_size); 725 dst->alloc_hint.expected_write_size = 726 cpu_to_le64(src->alloc_hint.expected_write_size); 727 break; 728 case CEPH_OSD_OP_SETXATTR: 729 case CEPH_OSD_OP_CMPXATTR: 730 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 731 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 732 dst->xattr.cmp_op = src->xattr.cmp_op; 733 dst->xattr.cmp_mode = src->xattr.cmp_mode; 734 osd_data = &src->xattr.osd_data; 735 ceph_osdc_msg_data_add(req->r_request, osd_data); 736 request_data_len = osd_data->pagelist->length; 737 break; 738 case CEPH_OSD_OP_CREATE: 739 case CEPH_OSD_OP_DELETE: 740 break; 741 default: 742 pr_err("unsupported osd opcode %s\n", 743 ceph_osd_op_name(src->op)); 744 WARN_ON(1); 745 746 return 0; 747 } 748 749 dst->op = cpu_to_le16(src->op); 750 dst->flags = cpu_to_le32(src->flags); 751 dst->payload_len = cpu_to_le32(src->payload_len); 752 753 return request_data_len; 754 } 755 756 /* 757 * build new request AND message, calculate layout, and adjust file 758 * extent as needed. 759 * 760 * if the file was recently truncated, we include information about its 761 * old and new size so that the object can be updated appropriately. (we 762 * avoid synchronously deleting truncated objects because it's slow.) 763 * 764 * if @do_sync, include a 'startsync' command so that the osd will flush 765 * data quickly. 766 */ 767 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 768 struct ceph_file_layout *layout, 769 struct ceph_vino vino, 770 u64 off, u64 *plen, 771 unsigned int which, int num_ops, 772 int opcode, int flags, 773 struct ceph_snap_context *snapc, 774 u32 truncate_seq, 775 u64 truncate_size, 776 bool use_mempool) 777 { 778 struct ceph_osd_request *req; 779 u64 objnum = 0; 780 u64 objoff = 0; 781 u64 objlen = 0; 782 int r; 783 784 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 785 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 786 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 787 788 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 789 GFP_NOFS); 790 if (!req) 791 return ERR_PTR(-ENOMEM); 792 793 req->r_flags = flags; 794 795 /* calculate max write size */ 796 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 797 if (r < 0) { 798 ceph_osdc_put_request(req); 799 return ERR_PTR(r); 800 } 801 802 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 803 osd_req_op_init(req, which, opcode, 0); 804 } else { 805 u32 object_size = le32_to_cpu(layout->fl_object_size); 806 u32 object_base = off - objoff; 807 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 808 if (truncate_size <= object_base) { 809 truncate_size = 0; 810 } else { 811 truncate_size -= object_base; 812 if (truncate_size > object_size) 813 truncate_size = object_size; 814 } 815 } 816 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 817 truncate_size, truncate_seq); 818 } 819 820 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout); 821 822 snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name), 823 "%llx.%08llx", vino.ino, objnum); 824 req->r_base_oid.name_len = strlen(req->r_base_oid.name); 825 826 return req; 827 } 828 EXPORT_SYMBOL(ceph_osdc_new_request); 829 830 /* 831 * We keep osd requests in an rbtree, sorted by ->r_tid. 832 */ 833 static void __insert_request(struct ceph_osd_client *osdc, 834 struct ceph_osd_request *new) 835 { 836 struct rb_node **p = &osdc->requests.rb_node; 837 struct rb_node *parent = NULL; 838 struct ceph_osd_request *req = NULL; 839 840 while (*p) { 841 parent = *p; 842 req = rb_entry(parent, struct ceph_osd_request, r_node); 843 if (new->r_tid < req->r_tid) 844 p = &(*p)->rb_left; 845 else if (new->r_tid > req->r_tid) 846 p = &(*p)->rb_right; 847 else 848 BUG(); 849 } 850 851 rb_link_node(&new->r_node, parent, p); 852 rb_insert_color(&new->r_node, &osdc->requests); 853 } 854 855 static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, 856 u64 tid) 857 { 858 struct ceph_osd_request *req; 859 struct rb_node *n = osdc->requests.rb_node; 860 861 while (n) { 862 req = rb_entry(n, struct ceph_osd_request, r_node); 863 if (tid < req->r_tid) 864 n = n->rb_left; 865 else if (tid > req->r_tid) 866 n = n->rb_right; 867 else 868 return req; 869 } 870 return NULL; 871 } 872 873 static struct ceph_osd_request * 874 __lookup_request_ge(struct ceph_osd_client *osdc, 875 u64 tid) 876 { 877 struct ceph_osd_request *req; 878 struct rb_node *n = osdc->requests.rb_node; 879 880 while (n) { 881 req = rb_entry(n, struct ceph_osd_request, r_node); 882 if (tid < req->r_tid) { 883 if (!n->rb_left) 884 return req; 885 n = n->rb_left; 886 } else if (tid > req->r_tid) { 887 n = n->rb_right; 888 } else { 889 return req; 890 } 891 } 892 return NULL; 893 } 894 895 static void __kick_linger_request(struct ceph_osd_request *req) 896 { 897 struct ceph_osd_client *osdc = req->r_osdc; 898 struct ceph_osd *osd = req->r_osd; 899 900 /* 901 * Linger requests need to be resent with a new tid to avoid 902 * the dup op detection logic on the OSDs. Achieve this with 903 * a re-register dance instead of open-coding. 904 */ 905 ceph_osdc_get_request(req); 906 if (!list_empty(&req->r_linger_item)) 907 __unregister_linger_request(osdc, req); 908 else 909 __unregister_request(osdc, req); 910 __register_request(osdc, req); 911 ceph_osdc_put_request(req); 912 913 /* 914 * Unless request has been registered as both normal and 915 * lingering, __unregister{,_linger}_request clears r_osd. 916 * However, here we need to preserve r_osd to make sure we 917 * requeue on the same OSD. 918 */ 919 WARN_ON(req->r_osd || !osd); 920 req->r_osd = osd; 921 922 dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid); 923 __enqueue_request(req); 924 } 925 926 /* 927 * Resubmit requests pending on the given osd. 928 */ 929 static void __kick_osd_requests(struct ceph_osd_client *osdc, 930 struct ceph_osd *osd) 931 { 932 struct ceph_osd_request *req, *nreq; 933 LIST_HEAD(resend); 934 LIST_HEAD(resend_linger); 935 int err; 936 937 dout("%s osd%d\n", __func__, osd->o_osd); 938 err = __reset_osd(osdc, osd); 939 if (err) 940 return; 941 942 /* 943 * Build up a list of requests to resend by traversing the 944 * osd's list of requests. Requests for a given object are 945 * sent in tid order, and that is also the order they're 946 * kept on this list. Therefore all requests that are in 947 * flight will be found first, followed by all requests that 948 * have not yet been sent. And to resend requests while 949 * preserving this order we will want to put any sent 950 * requests back on the front of the osd client's unsent 951 * list. 952 * 953 * So we build a separate ordered list of already-sent 954 * requests for the affected osd and splice it onto the 955 * front of the osd client's unsent list. Once we've seen a 956 * request that has not yet been sent we're done. Those 957 * requests are already sitting right where they belong. 958 */ 959 list_for_each_entry(req, &osd->o_requests, r_osd_item) { 960 if (!req->r_sent) 961 break; 962 963 if (!req->r_linger) { 964 dout("%s requeueing %p tid %llu\n", __func__, req, 965 req->r_tid); 966 list_move_tail(&req->r_req_lru_item, &resend); 967 req->r_flags |= CEPH_OSD_FLAG_RETRY; 968 } else { 969 list_move_tail(&req->r_req_lru_item, &resend_linger); 970 } 971 } 972 list_splice(&resend, &osdc->req_unsent); 973 974 /* 975 * Both registered and not yet registered linger requests are 976 * enqueued with a new tid on the same OSD. We add/move them 977 * to req_unsent/o_requests at the end to keep things in tid 978 * order. 979 */ 980 list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, 981 r_linger_osd_item) { 982 WARN_ON(!list_empty(&req->r_req_lru_item)); 983 __kick_linger_request(req); 984 } 985 986 list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item) 987 __kick_linger_request(req); 988 } 989 990 /* 991 * If the osd connection drops, we need to resubmit all requests. 992 */ 993 static void osd_reset(struct ceph_connection *con) 994 { 995 struct ceph_osd *osd = con->private; 996 struct ceph_osd_client *osdc; 997 998 if (!osd) 999 return; 1000 dout("osd_reset osd%d\n", osd->o_osd); 1001 osdc = osd->o_osdc; 1002 down_read(&osdc->map_sem); 1003 mutex_lock(&osdc->request_mutex); 1004 __kick_osd_requests(osdc, osd); 1005 __send_queued(osdc); 1006 mutex_unlock(&osdc->request_mutex); 1007 up_read(&osdc->map_sem); 1008 } 1009 1010 /* 1011 * Track open sessions with osds. 1012 */ 1013 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1014 { 1015 struct ceph_osd *osd; 1016 1017 osd = kzalloc(sizeof(*osd), GFP_NOFS); 1018 if (!osd) 1019 return NULL; 1020 1021 atomic_set(&osd->o_ref, 1); 1022 osd->o_osdc = osdc; 1023 osd->o_osd = onum; 1024 RB_CLEAR_NODE(&osd->o_node); 1025 INIT_LIST_HEAD(&osd->o_requests); 1026 INIT_LIST_HEAD(&osd->o_linger_requests); 1027 INIT_LIST_HEAD(&osd->o_osd_lru); 1028 osd->o_incarnation = 1; 1029 1030 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1031 1032 INIT_LIST_HEAD(&osd->o_keepalive_item); 1033 return osd; 1034 } 1035 1036 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1037 { 1038 if (atomic_inc_not_zero(&osd->o_ref)) { 1039 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, 1040 atomic_read(&osd->o_ref)); 1041 return osd; 1042 } else { 1043 dout("get_osd %p FAIL\n", osd); 1044 return NULL; 1045 } 1046 } 1047 1048 static void put_osd(struct ceph_osd *osd) 1049 { 1050 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), 1051 atomic_read(&osd->o_ref) - 1); 1052 if (atomic_dec_and_test(&osd->o_ref)) { 1053 struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; 1054 1055 if (osd->o_auth.authorizer) 1056 ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer); 1057 kfree(osd); 1058 } 1059 } 1060 1061 /* 1062 * remove an osd from our map 1063 */ 1064 static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1065 { 1066 dout("%s %p osd%d\n", __func__, osd, osd->o_osd); 1067 WARN_ON(!list_empty(&osd->o_requests)); 1068 WARN_ON(!list_empty(&osd->o_linger_requests)); 1069 1070 list_del_init(&osd->o_osd_lru); 1071 rb_erase(&osd->o_node, &osdc->osds); 1072 RB_CLEAR_NODE(&osd->o_node); 1073 } 1074 1075 static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1076 { 1077 dout("%s %p osd%d\n", __func__, osd, osd->o_osd); 1078 1079 if (!RB_EMPTY_NODE(&osd->o_node)) { 1080 ceph_con_close(&osd->o_con); 1081 __remove_osd(osdc, osd); 1082 put_osd(osd); 1083 } 1084 } 1085 1086 static void remove_all_osds(struct ceph_osd_client *osdc) 1087 { 1088 dout("%s %p\n", __func__, osdc); 1089 mutex_lock(&osdc->request_mutex); 1090 while (!RB_EMPTY_ROOT(&osdc->osds)) { 1091 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 1092 struct ceph_osd, o_node); 1093 remove_osd(osdc, osd); 1094 } 1095 mutex_unlock(&osdc->request_mutex); 1096 } 1097 1098 static void __move_osd_to_lru(struct ceph_osd_client *osdc, 1099 struct ceph_osd *osd) 1100 { 1101 dout("%s %p\n", __func__, osd); 1102 BUG_ON(!list_empty(&osd->o_osd_lru)); 1103 1104 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1105 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1106 } 1107 1108 static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc, 1109 struct ceph_osd *osd) 1110 { 1111 dout("%s %p\n", __func__, osd); 1112 1113 if (list_empty(&osd->o_requests) && 1114 list_empty(&osd->o_linger_requests)) 1115 __move_osd_to_lru(osdc, osd); 1116 } 1117 1118 static void __remove_osd_from_lru(struct ceph_osd *osd) 1119 { 1120 dout("__remove_osd_from_lru %p\n", osd); 1121 if (!list_empty(&osd->o_osd_lru)) 1122 list_del_init(&osd->o_osd_lru); 1123 } 1124 1125 static void remove_old_osds(struct ceph_osd_client *osdc) 1126 { 1127 struct ceph_osd *osd, *nosd; 1128 1129 dout("__remove_old_osds %p\n", osdc); 1130 mutex_lock(&osdc->request_mutex); 1131 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 1132 if (time_before(jiffies, osd->lru_ttl)) 1133 break; 1134 remove_osd(osdc, osd); 1135 } 1136 mutex_unlock(&osdc->request_mutex); 1137 } 1138 1139 /* 1140 * reset osd connect 1141 */ 1142 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) 1143 { 1144 struct ceph_entity_addr *peer_addr; 1145 1146 dout("__reset_osd %p osd%d\n", osd, osd->o_osd); 1147 if (list_empty(&osd->o_requests) && 1148 list_empty(&osd->o_linger_requests)) { 1149 remove_osd(osdc, osd); 1150 return -ENODEV; 1151 } 1152 1153 peer_addr = &osdc->osdmap->osd_addr[osd->o_osd]; 1154 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1155 !ceph_con_opened(&osd->o_con)) { 1156 struct ceph_osd_request *req; 1157 1158 dout("osd addr hasn't changed and connection never opened, " 1159 "letting msgr retry\n"); 1160 /* touch each r_stamp for handle_timeout()'s benfit */ 1161 list_for_each_entry(req, &osd->o_requests, r_osd_item) 1162 req->r_stamp = jiffies; 1163 1164 return -EAGAIN; 1165 } 1166 1167 ceph_con_close(&osd->o_con); 1168 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1169 osd->o_incarnation++; 1170 1171 return 0; 1172 } 1173 1174 static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) 1175 { 1176 struct rb_node **p = &osdc->osds.rb_node; 1177 struct rb_node *parent = NULL; 1178 struct ceph_osd *osd = NULL; 1179 1180 dout("__insert_osd %p osd%d\n", new, new->o_osd); 1181 while (*p) { 1182 parent = *p; 1183 osd = rb_entry(parent, struct ceph_osd, o_node); 1184 if (new->o_osd < osd->o_osd) 1185 p = &(*p)->rb_left; 1186 else if (new->o_osd > osd->o_osd) 1187 p = &(*p)->rb_right; 1188 else 1189 BUG(); 1190 } 1191 1192 rb_link_node(&new->o_node, parent, p); 1193 rb_insert_color(&new->o_node, &osdc->osds); 1194 } 1195 1196 static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) 1197 { 1198 struct ceph_osd *osd; 1199 struct rb_node *n = osdc->osds.rb_node; 1200 1201 while (n) { 1202 osd = rb_entry(n, struct ceph_osd, o_node); 1203 if (o < osd->o_osd) 1204 n = n->rb_left; 1205 else if (o > osd->o_osd) 1206 n = n->rb_right; 1207 else 1208 return osd; 1209 } 1210 return NULL; 1211 } 1212 1213 static void __schedule_osd_timeout(struct ceph_osd_client *osdc) 1214 { 1215 schedule_delayed_work(&osdc->timeout_work, 1216 osdc->client->options->osd_keepalive_timeout); 1217 } 1218 1219 static void __cancel_osd_timeout(struct ceph_osd_client *osdc) 1220 { 1221 cancel_delayed_work(&osdc->timeout_work); 1222 } 1223 1224 /* 1225 * Register request, assign tid. If this is the first request, set up 1226 * the timeout event. 1227 */ 1228 static void __register_request(struct ceph_osd_client *osdc, 1229 struct ceph_osd_request *req) 1230 { 1231 req->r_tid = ++osdc->last_tid; 1232 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 1233 dout("__register_request %p tid %lld\n", req, req->r_tid); 1234 __insert_request(osdc, req); 1235 ceph_osdc_get_request(req); 1236 osdc->num_requests++; 1237 if (osdc->num_requests == 1) { 1238 dout(" first request, scheduling timeout\n"); 1239 __schedule_osd_timeout(osdc); 1240 } 1241 } 1242 1243 /* 1244 * called under osdc->request_mutex 1245 */ 1246 static void __unregister_request(struct ceph_osd_client *osdc, 1247 struct ceph_osd_request *req) 1248 { 1249 if (RB_EMPTY_NODE(&req->r_node)) { 1250 dout("__unregister_request %p tid %lld not registered\n", 1251 req, req->r_tid); 1252 return; 1253 } 1254 1255 dout("__unregister_request %p tid %lld\n", req, req->r_tid); 1256 rb_erase(&req->r_node, &osdc->requests); 1257 RB_CLEAR_NODE(&req->r_node); 1258 osdc->num_requests--; 1259 1260 if (req->r_osd) { 1261 /* make sure the original request isn't in flight. */ 1262 ceph_msg_revoke(req->r_request); 1263 1264 list_del_init(&req->r_osd_item); 1265 maybe_move_osd_to_lru(osdc, req->r_osd); 1266 if (list_empty(&req->r_linger_osd_item)) 1267 req->r_osd = NULL; 1268 } 1269 1270 list_del_init(&req->r_req_lru_item); 1271 ceph_osdc_put_request(req); 1272 1273 if (osdc->num_requests == 0) { 1274 dout(" no requests, canceling timeout\n"); 1275 __cancel_osd_timeout(osdc); 1276 } 1277 } 1278 1279 /* 1280 * Cancel a previously queued request message 1281 */ 1282 static void __cancel_request(struct ceph_osd_request *req) 1283 { 1284 if (req->r_sent && req->r_osd) { 1285 ceph_msg_revoke(req->r_request); 1286 req->r_sent = 0; 1287 } 1288 } 1289 1290 static void __register_linger_request(struct ceph_osd_client *osdc, 1291 struct ceph_osd_request *req) 1292 { 1293 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 1294 WARN_ON(!req->r_linger); 1295 1296 ceph_osdc_get_request(req); 1297 list_add_tail(&req->r_linger_item, &osdc->req_linger); 1298 if (req->r_osd) 1299 list_add_tail(&req->r_linger_osd_item, 1300 &req->r_osd->o_linger_requests); 1301 } 1302 1303 static void __unregister_linger_request(struct ceph_osd_client *osdc, 1304 struct ceph_osd_request *req) 1305 { 1306 WARN_ON(!req->r_linger); 1307 1308 if (list_empty(&req->r_linger_item)) { 1309 dout("%s %p tid %llu not registered\n", __func__, req, 1310 req->r_tid); 1311 return; 1312 } 1313 1314 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 1315 list_del_init(&req->r_linger_item); 1316 1317 if (req->r_osd) { 1318 list_del_init(&req->r_linger_osd_item); 1319 maybe_move_osd_to_lru(osdc, req->r_osd); 1320 if (list_empty(&req->r_osd_item)) 1321 req->r_osd = NULL; 1322 } 1323 ceph_osdc_put_request(req); 1324 } 1325 1326 void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, 1327 struct ceph_osd_request *req) 1328 { 1329 if (!req->r_linger) { 1330 dout("set_request_linger %p\n", req); 1331 req->r_linger = 1; 1332 } 1333 } 1334 EXPORT_SYMBOL(ceph_osdc_set_request_linger); 1335 1336 /* 1337 * Returns whether a request should be blocked from being sent 1338 * based on the current osdmap and osd_client settings. 1339 * 1340 * Caller should hold map_sem for read. 1341 */ 1342 static bool __req_should_be_paused(struct ceph_osd_client *osdc, 1343 struct ceph_osd_request *req) 1344 { 1345 bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); 1346 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || 1347 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 1348 return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) || 1349 (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr); 1350 } 1351 1352 /* 1353 * Calculate mapping of a request to a PG. Takes tiering into account. 1354 */ 1355 static int __calc_request_pg(struct ceph_osdmap *osdmap, 1356 struct ceph_osd_request *req, 1357 struct ceph_pg *pg_out) 1358 { 1359 bool need_check_tiering; 1360 1361 need_check_tiering = false; 1362 if (req->r_target_oloc.pool == -1) { 1363 req->r_target_oloc = req->r_base_oloc; /* struct */ 1364 need_check_tiering = true; 1365 } 1366 if (req->r_target_oid.name_len == 0) { 1367 ceph_oid_copy(&req->r_target_oid, &req->r_base_oid); 1368 need_check_tiering = true; 1369 } 1370 1371 if (need_check_tiering && 1372 (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1373 struct ceph_pg_pool_info *pi; 1374 1375 pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool); 1376 if (pi) { 1377 if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1378 pi->read_tier >= 0) 1379 req->r_target_oloc.pool = pi->read_tier; 1380 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1381 pi->write_tier >= 0) 1382 req->r_target_oloc.pool = pi->write_tier; 1383 } 1384 /* !pi is caught in ceph_oloc_oid_to_pg() */ 1385 } 1386 1387 return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc, 1388 &req->r_target_oid, pg_out); 1389 } 1390 1391 static void __enqueue_request(struct ceph_osd_request *req) 1392 { 1393 struct ceph_osd_client *osdc = req->r_osdc; 1394 1395 dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid, 1396 req->r_osd ? req->r_osd->o_osd : -1); 1397 1398 if (req->r_osd) { 1399 __remove_osd_from_lru(req->r_osd); 1400 list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); 1401 list_move_tail(&req->r_req_lru_item, &osdc->req_unsent); 1402 } else { 1403 list_move_tail(&req->r_req_lru_item, &osdc->req_notarget); 1404 } 1405 } 1406 1407 /* 1408 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct 1409 * (as needed), and set the request r_osd appropriately. If there is 1410 * no up osd, set r_osd to NULL. Move the request to the appropriate list 1411 * (unsent, homeless) or leave on in-flight lru. 1412 * 1413 * Return 0 if unchanged, 1 if changed, or negative on error. 1414 * 1415 * Caller should hold map_sem for read and request_mutex. 1416 */ 1417 static int __map_request(struct ceph_osd_client *osdc, 1418 struct ceph_osd_request *req, int force_resend) 1419 { 1420 struct ceph_pg pgid; 1421 int acting[CEPH_PG_MAX_SIZE]; 1422 int num, o; 1423 int err; 1424 bool was_paused; 1425 1426 dout("map_request %p tid %lld\n", req, req->r_tid); 1427 1428 err = __calc_request_pg(osdc->osdmap, req, &pgid); 1429 if (err) { 1430 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1431 return err; 1432 } 1433 req->r_pgid = pgid; 1434 1435 num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o); 1436 if (num < 0) 1437 num = 0; 1438 1439 was_paused = req->r_paused; 1440 req->r_paused = __req_should_be_paused(osdc, req); 1441 if (was_paused && !req->r_paused) 1442 force_resend = 1; 1443 1444 if ((!force_resend && 1445 req->r_osd && req->r_osd->o_osd == o && 1446 req->r_sent >= req->r_osd->o_incarnation && 1447 req->r_num_pg_osds == num && 1448 memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || 1449 (req->r_osd == NULL && o == -1) || 1450 req->r_paused) 1451 return 0; /* no change */ 1452 1453 dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n", 1454 req->r_tid, pgid.pool, pgid.seed, o, 1455 req->r_osd ? req->r_osd->o_osd : -1); 1456 1457 /* record full pg acting set */ 1458 memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); 1459 req->r_num_pg_osds = num; 1460 1461 if (req->r_osd) { 1462 __cancel_request(req); 1463 list_del_init(&req->r_osd_item); 1464 list_del_init(&req->r_linger_osd_item); 1465 req->r_osd = NULL; 1466 } 1467 1468 req->r_osd = __lookup_osd(osdc, o); 1469 if (!req->r_osd && o >= 0) { 1470 err = -ENOMEM; 1471 req->r_osd = create_osd(osdc, o); 1472 if (!req->r_osd) { 1473 list_move(&req->r_req_lru_item, &osdc->req_notarget); 1474 goto out; 1475 } 1476 1477 dout("map_request osd %p is osd%d\n", req->r_osd, o); 1478 __insert_osd(osdc, req->r_osd); 1479 1480 ceph_con_open(&req->r_osd->o_con, 1481 CEPH_ENTITY_TYPE_OSD, o, 1482 &osdc->osdmap->osd_addr[o]); 1483 } 1484 1485 __enqueue_request(req); 1486 err = 1; /* osd or pg changed */ 1487 1488 out: 1489 return err; 1490 } 1491 1492 /* 1493 * caller should hold map_sem (for read) and request_mutex 1494 */ 1495 static void __send_request(struct ceph_osd_client *osdc, 1496 struct ceph_osd_request *req) 1497 { 1498 void *p; 1499 1500 dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n", 1501 req, req->r_tid, req->r_osd->o_osd, req->r_flags, 1502 (unsigned long long)req->r_pgid.pool, req->r_pgid.seed); 1503 1504 /* fill in message content that changes each time we send it */ 1505 put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch); 1506 put_unaligned_le32(req->r_flags, req->r_request_flags); 1507 put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool); 1508 p = req->r_request_pgid; 1509 ceph_encode_64(&p, req->r_pgid.pool); 1510 ceph_encode_32(&p, req->r_pgid.seed); 1511 put_unaligned_le64(1, req->r_request_attempts); /* FIXME */ 1512 memcpy(req->r_request_reassert_version, &req->r_reassert_version, 1513 sizeof(req->r_reassert_version)); 1514 1515 req->r_stamp = jiffies; 1516 list_move_tail(&req->r_req_lru_item, &osdc->req_lru); 1517 1518 ceph_msg_get(req->r_request); /* send consumes a ref */ 1519 1520 req->r_sent = req->r_osd->o_incarnation; 1521 1522 ceph_con_send(&req->r_osd->o_con, req->r_request); 1523 } 1524 1525 /* 1526 * Send any requests in the queue (req_unsent). 1527 */ 1528 static void __send_queued(struct ceph_osd_client *osdc) 1529 { 1530 struct ceph_osd_request *req, *tmp; 1531 1532 dout("__send_queued\n"); 1533 list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) 1534 __send_request(osdc, req); 1535 } 1536 1537 /* 1538 * Caller should hold map_sem for read and request_mutex. 1539 */ 1540 static int __ceph_osdc_start_request(struct ceph_osd_client *osdc, 1541 struct ceph_osd_request *req, 1542 bool nofail) 1543 { 1544 int rc; 1545 1546 __register_request(osdc, req); 1547 req->r_sent = 0; 1548 req->r_got_reply = 0; 1549 rc = __map_request(osdc, req, 0); 1550 if (rc < 0) { 1551 if (nofail) { 1552 dout("osdc_start_request failed map, " 1553 " will retry %lld\n", req->r_tid); 1554 rc = 0; 1555 } else { 1556 __unregister_request(osdc, req); 1557 } 1558 return rc; 1559 } 1560 1561 if (req->r_osd == NULL) { 1562 dout("send_request %p no up osds in pg\n", req); 1563 ceph_monc_request_next_osdmap(&osdc->client->monc); 1564 } else { 1565 __send_queued(osdc); 1566 } 1567 1568 return 0; 1569 } 1570 1571 /* 1572 * Timeout callback, called every N seconds when 1 or more osd 1573 * requests has been active for more than N seconds. When this 1574 * happens, we ping all OSDs with requests who have timed out to 1575 * ensure any communications channel reset is detected. Reset the 1576 * request timeouts another N seconds in the future as we go. 1577 * Reschedule the timeout event another N seconds in future (unless 1578 * there are no open requests). 1579 */ 1580 static void handle_timeout(struct work_struct *work) 1581 { 1582 struct ceph_osd_client *osdc = 1583 container_of(work, struct ceph_osd_client, timeout_work.work); 1584 struct ceph_options *opts = osdc->client->options; 1585 struct ceph_osd_request *req; 1586 struct ceph_osd *osd; 1587 struct list_head slow_osds; 1588 dout("timeout\n"); 1589 down_read(&osdc->map_sem); 1590 1591 ceph_monc_request_next_osdmap(&osdc->client->monc); 1592 1593 mutex_lock(&osdc->request_mutex); 1594 1595 /* 1596 * ping osds that are a bit slow. this ensures that if there 1597 * is a break in the TCP connection we will notice, and reopen 1598 * a connection with that osd (from the fault callback). 1599 */ 1600 INIT_LIST_HEAD(&slow_osds); 1601 list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { 1602 if (time_before(jiffies, 1603 req->r_stamp + opts->osd_keepalive_timeout)) 1604 break; 1605 1606 osd = req->r_osd; 1607 BUG_ON(!osd); 1608 dout(" tid %llu is slow, will send keepalive on osd%d\n", 1609 req->r_tid, osd->o_osd); 1610 list_move_tail(&osd->o_keepalive_item, &slow_osds); 1611 } 1612 while (!list_empty(&slow_osds)) { 1613 osd = list_entry(slow_osds.next, struct ceph_osd, 1614 o_keepalive_item); 1615 list_del_init(&osd->o_keepalive_item); 1616 ceph_con_keepalive(&osd->o_con); 1617 } 1618 1619 __schedule_osd_timeout(osdc); 1620 __send_queued(osdc); 1621 mutex_unlock(&osdc->request_mutex); 1622 up_read(&osdc->map_sem); 1623 } 1624 1625 static void handle_osds_timeout(struct work_struct *work) 1626 { 1627 struct ceph_osd_client *osdc = 1628 container_of(work, struct ceph_osd_client, 1629 osds_timeout_work.work); 1630 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 1631 1632 dout("osds timeout\n"); 1633 down_read(&osdc->map_sem); 1634 remove_old_osds(osdc); 1635 up_read(&osdc->map_sem); 1636 1637 schedule_delayed_work(&osdc->osds_timeout_work, 1638 round_jiffies_relative(delay)); 1639 } 1640 1641 static int ceph_oloc_decode(void **p, void *end, 1642 struct ceph_object_locator *oloc) 1643 { 1644 u8 struct_v, struct_cv; 1645 u32 len; 1646 void *struct_end; 1647 int ret = 0; 1648 1649 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1650 struct_v = ceph_decode_8(p); 1651 struct_cv = ceph_decode_8(p); 1652 if (struct_v < 3) { 1653 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 1654 struct_v, struct_cv); 1655 goto e_inval; 1656 } 1657 if (struct_cv > 6) { 1658 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 1659 struct_v, struct_cv); 1660 goto e_inval; 1661 } 1662 len = ceph_decode_32(p); 1663 ceph_decode_need(p, end, len, e_inval); 1664 struct_end = *p + len; 1665 1666 oloc->pool = ceph_decode_64(p); 1667 *p += 4; /* skip preferred */ 1668 1669 len = ceph_decode_32(p); 1670 if (len > 0) { 1671 pr_warn("ceph_object_locator::key is set\n"); 1672 goto e_inval; 1673 } 1674 1675 if (struct_v >= 5) { 1676 len = ceph_decode_32(p); 1677 if (len > 0) { 1678 pr_warn("ceph_object_locator::nspace is set\n"); 1679 goto e_inval; 1680 } 1681 } 1682 1683 if (struct_v >= 6) { 1684 s64 hash = ceph_decode_64(p); 1685 if (hash != -1) { 1686 pr_warn("ceph_object_locator::hash is set\n"); 1687 goto e_inval; 1688 } 1689 } 1690 1691 /* skip the rest */ 1692 *p = struct_end; 1693 out: 1694 return ret; 1695 1696 e_inval: 1697 ret = -EINVAL; 1698 goto out; 1699 } 1700 1701 static int ceph_redirect_decode(void **p, void *end, 1702 struct ceph_request_redirect *redir) 1703 { 1704 u8 struct_v, struct_cv; 1705 u32 len; 1706 void *struct_end; 1707 int ret; 1708 1709 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 1710 struct_v = ceph_decode_8(p); 1711 struct_cv = ceph_decode_8(p); 1712 if (struct_cv > 1) { 1713 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 1714 struct_v, struct_cv); 1715 goto e_inval; 1716 } 1717 len = ceph_decode_32(p); 1718 ceph_decode_need(p, end, len, e_inval); 1719 struct_end = *p + len; 1720 1721 ret = ceph_oloc_decode(p, end, &redir->oloc); 1722 if (ret) 1723 goto out; 1724 1725 len = ceph_decode_32(p); 1726 if (len > 0) { 1727 pr_warn("ceph_request_redirect::object_name is set\n"); 1728 goto e_inval; 1729 } 1730 1731 len = ceph_decode_32(p); 1732 *p += len; /* skip osd_instructions */ 1733 1734 /* skip the rest */ 1735 *p = struct_end; 1736 out: 1737 return ret; 1738 1739 e_inval: 1740 ret = -EINVAL; 1741 goto out; 1742 } 1743 1744 static void complete_request(struct ceph_osd_request *req) 1745 { 1746 complete_all(&req->r_safe_completion); /* fsync waiter */ 1747 } 1748 1749 /* 1750 * handle osd op reply. either call the callback if it is specified, 1751 * or do the completion to wake up the waiting thread. 1752 */ 1753 static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, 1754 struct ceph_connection *con) 1755 { 1756 void *p, *end; 1757 struct ceph_osd_request *req; 1758 struct ceph_request_redirect redir; 1759 u64 tid; 1760 int object_len; 1761 unsigned int numops; 1762 int payload_len, flags; 1763 s32 result; 1764 s32 retry_attempt; 1765 struct ceph_pg pg; 1766 int err; 1767 u32 reassert_epoch; 1768 u64 reassert_version; 1769 u32 osdmap_epoch; 1770 int already_completed; 1771 u32 bytes; 1772 unsigned int i; 1773 1774 tid = le64_to_cpu(msg->hdr.tid); 1775 dout("handle_reply %p tid %llu\n", msg, tid); 1776 1777 p = msg->front.iov_base; 1778 end = p + msg->front.iov_len; 1779 1780 ceph_decode_need(&p, end, 4, bad); 1781 object_len = ceph_decode_32(&p); 1782 ceph_decode_need(&p, end, object_len, bad); 1783 p += object_len; 1784 1785 err = ceph_decode_pgid(&p, end, &pg); 1786 if (err) 1787 goto bad; 1788 1789 ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad); 1790 flags = ceph_decode_64(&p); 1791 result = ceph_decode_32(&p); 1792 reassert_epoch = ceph_decode_32(&p); 1793 reassert_version = ceph_decode_64(&p); 1794 osdmap_epoch = ceph_decode_32(&p); 1795 1796 /* lookup */ 1797 down_read(&osdc->map_sem); 1798 mutex_lock(&osdc->request_mutex); 1799 req = __lookup_request(osdc, tid); 1800 if (req == NULL) { 1801 dout("handle_reply tid %llu dne\n", tid); 1802 goto bad_mutex; 1803 } 1804 ceph_osdc_get_request(req); 1805 1806 dout("handle_reply %p tid %llu req %p result %d\n", msg, tid, 1807 req, result); 1808 1809 ceph_decode_need(&p, end, 4, bad_put); 1810 numops = ceph_decode_32(&p); 1811 if (numops > CEPH_OSD_MAX_OP) 1812 goto bad_put; 1813 if (numops != req->r_num_ops) 1814 goto bad_put; 1815 payload_len = 0; 1816 ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put); 1817 for (i = 0; i < numops; i++) { 1818 struct ceph_osd_op *op = p; 1819 int len; 1820 1821 len = le32_to_cpu(op->payload_len); 1822 req->r_reply_op_len[i] = len; 1823 dout(" op %d has %d bytes\n", i, len); 1824 payload_len += len; 1825 p += sizeof(*op); 1826 } 1827 bytes = le32_to_cpu(msg->hdr.data_len); 1828 if (payload_len != bytes) { 1829 pr_warn("sum of op payload lens %d != data_len %d\n", 1830 payload_len, bytes); 1831 goto bad_put; 1832 } 1833 1834 ceph_decode_need(&p, end, 4 + numops * 4, bad_put); 1835 retry_attempt = ceph_decode_32(&p); 1836 for (i = 0; i < numops; i++) 1837 req->r_reply_op_result[i] = ceph_decode_32(&p); 1838 1839 if (le16_to_cpu(msg->hdr.version) >= 6) { 1840 p += 8 + 4; /* skip replay_version */ 1841 p += 8; /* skip user_version */ 1842 1843 err = ceph_redirect_decode(&p, end, &redir); 1844 if (err) 1845 goto bad_put; 1846 } else { 1847 redir.oloc.pool = -1; 1848 } 1849 1850 if (redir.oloc.pool != -1) { 1851 dout("redirect pool %lld\n", redir.oloc.pool); 1852 1853 __unregister_request(osdc, req); 1854 1855 req->r_target_oloc = redir.oloc; /* struct */ 1856 1857 /* 1858 * Start redirect requests with nofail=true. If 1859 * mapping fails, request will end up on the notarget 1860 * list, waiting for the new osdmap (which can take 1861 * a while), even though the original request mapped 1862 * successfully. In the future we might want to follow 1863 * original request's nofail setting here. 1864 */ 1865 err = __ceph_osdc_start_request(osdc, req, true); 1866 BUG_ON(err); 1867 1868 goto out_unlock; 1869 } 1870 1871 already_completed = req->r_got_reply; 1872 if (!req->r_got_reply) { 1873 req->r_result = result; 1874 dout("handle_reply result %d bytes %d\n", req->r_result, 1875 bytes); 1876 if (req->r_result == 0) 1877 req->r_result = bytes; 1878 1879 /* in case this is a write and we need to replay, */ 1880 req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch); 1881 req->r_reassert_version.version = cpu_to_le64(reassert_version); 1882 1883 req->r_got_reply = 1; 1884 } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { 1885 dout("handle_reply tid %llu dup ack\n", tid); 1886 goto out_unlock; 1887 } 1888 1889 dout("handle_reply tid %llu flags %d\n", tid, flags); 1890 1891 if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) 1892 __register_linger_request(osdc, req); 1893 1894 /* either this is a read, or we got the safe response */ 1895 if (result < 0 || 1896 (flags & CEPH_OSD_FLAG_ONDISK) || 1897 ((flags & CEPH_OSD_FLAG_WRITE) == 0)) 1898 __unregister_request(osdc, req); 1899 1900 mutex_unlock(&osdc->request_mutex); 1901 up_read(&osdc->map_sem); 1902 1903 if (!already_completed) { 1904 if (req->r_unsafe_callback && 1905 result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK)) 1906 req->r_unsafe_callback(req, true); 1907 if (req->r_callback) 1908 req->r_callback(req, msg); 1909 else 1910 complete_all(&req->r_completion); 1911 } 1912 1913 if (flags & CEPH_OSD_FLAG_ONDISK) { 1914 if (req->r_unsafe_callback && already_completed) 1915 req->r_unsafe_callback(req, false); 1916 complete_request(req); 1917 } 1918 1919 out: 1920 dout("req=%p req->r_linger=%d\n", req, req->r_linger); 1921 ceph_osdc_put_request(req); 1922 return; 1923 out_unlock: 1924 mutex_unlock(&osdc->request_mutex); 1925 up_read(&osdc->map_sem); 1926 goto out; 1927 1928 bad_put: 1929 req->r_result = -EIO; 1930 __unregister_request(osdc, req); 1931 if (req->r_callback) 1932 req->r_callback(req, msg); 1933 else 1934 complete_all(&req->r_completion); 1935 complete_request(req); 1936 ceph_osdc_put_request(req); 1937 bad_mutex: 1938 mutex_unlock(&osdc->request_mutex); 1939 up_read(&osdc->map_sem); 1940 bad: 1941 pr_err("corrupt osd_op_reply got %d %d\n", 1942 (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len)); 1943 ceph_msg_dump(msg); 1944 } 1945 1946 static void reset_changed_osds(struct ceph_osd_client *osdc) 1947 { 1948 struct rb_node *p, *n; 1949 1950 dout("%s %p\n", __func__, osdc); 1951 for (p = rb_first(&osdc->osds); p; p = n) { 1952 struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); 1953 1954 n = rb_next(p); 1955 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 1956 memcmp(&osd->o_con.peer_addr, 1957 ceph_osd_addr(osdc->osdmap, 1958 osd->o_osd), 1959 sizeof(struct ceph_entity_addr)) != 0) 1960 __reset_osd(osdc, osd); 1961 } 1962 } 1963 1964 /* 1965 * Requeue requests whose mapping to an OSD has changed. If requests map to 1966 * no osd, request a new map. 1967 * 1968 * Caller should hold map_sem for read. 1969 */ 1970 static void kick_requests(struct ceph_osd_client *osdc, bool force_resend, 1971 bool force_resend_writes) 1972 { 1973 struct ceph_osd_request *req, *nreq; 1974 struct rb_node *p; 1975 int needmap = 0; 1976 int err; 1977 bool force_resend_req; 1978 1979 dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "", 1980 force_resend_writes ? " (force resend writes)" : ""); 1981 mutex_lock(&osdc->request_mutex); 1982 for (p = rb_first(&osdc->requests); p; ) { 1983 req = rb_entry(p, struct ceph_osd_request, r_node); 1984 p = rb_next(p); 1985 1986 /* 1987 * For linger requests that have not yet been 1988 * registered, move them to the linger list; they'll 1989 * be sent to the osd in the loop below. Unregister 1990 * the request before re-registering it as a linger 1991 * request to ensure the __map_request() below 1992 * will decide it needs to be sent. 1993 */ 1994 if (req->r_linger && list_empty(&req->r_linger_item)) { 1995 dout("%p tid %llu restart on osd%d\n", 1996 req, req->r_tid, 1997 req->r_osd ? req->r_osd->o_osd : -1); 1998 ceph_osdc_get_request(req); 1999 __unregister_request(osdc, req); 2000 __register_linger_request(osdc, req); 2001 ceph_osdc_put_request(req); 2002 continue; 2003 } 2004 2005 force_resend_req = force_resend || 2006 (force_resend_writes && 2007 req->r_flags & CEPH_OSD_FLAG_WRITE); 2008 err = __map_request(osdc, req, force_resend_req); 2009 if (err < 0) 2010 continue; /* error */ 2011 if (req->r_osd == NULL) { 2012 dout("%p tid %llu maps to no osd\n", req, req->r_tid); 2013 needmap++; /* request a newer map */ 2014 } else if (err > 0) { 2015 if (!req->r_linger) { 2016 dout("%p tid %llu requeued on osd%d\n", req, 2017 req->r_tid, 2018 req->r_osd ? req->r_osd->o_osd : -1); 2019 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2020 } 2021 } 2022 } 2023 2024 list_for_each_entry_safe(req, nreq, &osdc->req_linger, 2025 r_linger_item) { 2026 dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); 2027 2028 err = __map_request(osdc, req, 2029 force_resend || force_resend_writes); 2030 dout("__map_request returned %d\n", err); 2031 if (err < 0) 2032 continue; /* hrm! */ 2033 if (req->r_osd == NULL || err > 0) { 2034 if (req->r_osd == NULL) { 2035 dout("lingering %p tid %llu maps to no osd\n", 2036 req, req->r_tid); 2037 /* 2038 * A homeless lingering request makes 2039 * no sense, as it's job is to keep 2040 * a particular OSD connection open. 2041 * Request a newer map and kick the 2042 * request, knowing that it won't be 2043 * resent until we actually get a map 2044 * that can tell us where to send it. 2045 */ 2046 needmap++; 2047 } 2048 2049 dout("kicking lingering %p tid %llu osd%d\n", req, 2050 req->r_tid, req->r_osd ? req->r_osd->o_osd : -1); 2051 __register_request(osdc, req); 2052 __unregister_linger_request(osdc, req); 2053 } 2054 } 2055 reset_changed_osds(osdc); 2056 mutex_unlock(&osdc->request_mutex); 2057 2058 if (needmap) { 2059 dout("%d requests for down osds, need new map\n", needmap); 2060 ceph_monc_request_next_osdmap(&osdc->client->monc); 2061 } 2062 } 2063 2064 2065 /* 2066 * Process updated osd map. 2067 * 2068 * The message contains any number of incremental and full maps, normally 2069 * indicating some sort of topology change in the cluster. Kick requests 2070 * off to different OSDs as needed. 2071 */ 2072 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 2073 { 2074 void *p, *end, *next; 2075 u32 nr_maps, maplen; 2076 u32 epoch; 2077 struct ceph_osdmap *newmap = NULL, *oldmap; 2078 int err; 2079 struct ceph_fsid fsid; 2080 bool was_full; 2081 2082 dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); 2083 p = msg->front.iov_base; 2084 end = p + msg->front.iov_len; 2085 2086 /* verify fsid */ 2087 ceph_decode_need(&p, end, sizeof(fsid), bad); 2088 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 2089 if (ceph_check_fsid(osdc->client, &fsid) < 0) 2090 return; 2091 2092 down_write(&osdc->map_sem); 2093 2094 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 2095 2096 /* incremental maps */ 2097 ceph_decode_32_safe(&p, end, nr_maps, bad); 2098 dout(" %d inc maps\n", nr_maps); 2099 while (nr_maps > 0) { 2100 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2101 epoch = ceph_decode_32(&p); 2102 maplen = ceph_decode_32(&p); 2103 ceph_decode_need(&p, end, maplen, bad); 2104 next = p + maplen; 2105 if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { 2106 dout("applying incremental map %u len %d\n", 2107 epoch, maplen); 2108 newmap = osdmap_apply_incremental(&p, next, 2109 osdc->osdmap, 2110 &osdc->client->msgr); 2111 if (IS_ERR(newmap)) { 2112 err = PTR_ERR(newmap); 2113 goto bad; 2114 } 2115 BUG_ON(!newmap); 2116 if (newmap != osdc->osdmap) { 2117 ceph_osdmap_destroy(osdc->osdmap); 2118 osdc->osdmap = newmap; 2119 } 2120 was_full = was_full || 2121 ceph_osdmap_flag(osdc->osdmap, 2122 CEPH_OSDMAP_FULL); 2123 kick_requests(osdc, 0, was_full); 2124 } else { 2125 dout("ignoring incremental map %u len %d\n", 2126 epoch, maplen); 2127 } 2128 p = next; 2129 nr_maps--; 2130 } 2131 if (newmap) 2132 goto done; 2133 2134 /* full maps */ 2135 ceph_decode_32_safe(&p, end, nr_maps, bad); 2136 dout(" %d full maps\n", nr_maps); 2137 while (nr_maps) { 2138 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 2139 epoch = ceph_decode_32(&p); 2140 maplen = ceph_decode_32(&p); 2141 ceph_decode_need(&p, end, maplen, bad); 2142 if (nr_maps > 1) { 2143 dout("skipping non-latest full map %u len %d\n", 2144 epoch, maplen); 2145 } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) { 2146 dout("skipping full map %u len %d, " 2147 "older than our %u\n", epoch, maplen, 2148 osdc->osdmap->epoch); 2149 } else { 2150 int skipped_map = 0; 2151 2152 dout("taking full map %u len %d\n", epoch, maplen); 2153 newmap = ceph_osdmap_decode(&p, p+maplen); 2154 if (IS_ERR(newmap)) { 2155 err = PTR_ERR(newmap); 2156 goto bad; 2157 } 2158 BUG_ON(!newmap); 2159 oldmap = osdc->osdmap; 2160 osdc->osdmap = newmap; 2161 if (oldmap) { 2162 if (oldmap->epoch + 1 < newmap->epoch) 2163 skipped_map = 1; 2164 ceph_osdmap_destroy(oldmap); 2165 } 2166 was_full = was_full || 2167 ceph_osdmap_flag(osdc->osdmap, 2168 CEPH_OSDMAP_FULL); 2169 kick_requests(osdc, skipped_map, was_full); 2170 } 2171 p += maplen; 2172 nr_maps--; 2173 } 2174 2175 if (!osdc->osdmap) 2176 goto bad; 2177 done: 2178 downgrade_write(&osdc->map_sem); 2179 ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); 2180 2181 /* 2182 * subscribe to subsequent osdmap updates if full to ensure 2183 * we find out when we are no longer full and stop returning 2184 * ENOSPC. 2185 */ 2186 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 2187 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) || 2188 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) 2189 ceph_monc_request_next_osdmap(&osdc->client->monc); 2190 2191 mutex_lock(&osdc->request_mutex); 2192 __send_queued(osdc); 2193 mutex_unlock(&osdc->request_mutex); 2194 up_read(&osdc->map_sem); 2195 wake_up_all(&osdc->client->auth_wq); 2196 return; 2197 2198 bad: 2199 pr_err("osdc handle_map corrupt msg\n"); 2200 ceph_msg_dump(msg); 2201 up_write(&osdc->map_sem); 2202 } 2203 2204 /* 2205 * watch/notify callback event infrastructure 2206 * 2207 * These callbacks are used both for watch and notify operations. 2208 */ 2209 static void __release_event(struct kref *kref) 2210 { 2211 struct ceph_osd_event *event = 2212 container_of(kref, struct ceph_osd_event, kref); 2213 2214 dout("__release_event %p\n", event); 2215 kfree(event); 2216 } 2217 2218 static void get_event(struct ceph_osd_event *event) 2219 { 2220 kref_get(&event->kref); 2221 } 2222 2223 void ceph_osdc_put_event(struct ceph_osd_event *event) 2224 { 2225 kref_put(&event->kref, __release_event); 2226 } 2227 EXPORT_SYMBOL(ceph_osdc_put_event); 2228 2229 static void __insert_event(struct ceph_osd_client *osdc, 2230 struct ceph_osd_event *new) 2231 { 2232 struct rb_node **p = &osdc->event_tree.rb_node; 2233 struct rb_node *parent = NULL; 2234 struct ceph_osd_event *event = NULL; 2235 2236 while (*p) { 2237 parent = *p; 2238 event = rb_entry(parent, struct ceph_osd_event, node); 2239 if (new->cookie < event->cookie) 2240 p = &(*p)->rb_left; 2241 else if (new->cookie > event->cookie) 2242 p = &(*p)->rb_right; 2243 else 2244 BUG(); 2245 } 2246 2247 rb_link_node(&new->node, parent, p); 2248 rb_insert_color(&new->node, &osdc->event_tree); 2249 } 2250 2251 static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, 2252 u64 cookie) 2253 { 2254 struct rb_node **p = &osdc->event_tree.rb_node; 2255 struct rb_node *parent = NULL; 2256 struct ceph_osd_event *event = NULL; 2257 2258 while (*p) { 2259 parent = *p; 2260 event = rb_entry(parent, struct ceph_osd_event, node); 2261 if (cookie < event->cookie) 2262 p = &(*p)->rb_left; 2263 else if (cookie > event->cookie) 2264 p = &(*p)->rb_right; 2265 else 2266 return event; 2267 } 2268 return NULL; 2269 } 2270 2271 static void __remove_event(struct ceph_osd_event *event) 2272 { 2273 struct ceph_osd_client *osdc = event->osdc; 2274 2275 if (!RB_EMPTY_NODE(&event->node)) { 2276 dout("__remove_event removed %p\n", event); 2277 rb_erase(&event->node, &osdc->event_tree); 2278 ceph_osdc_put_event(event); 2279 } else { 2280 dout("__remove_event didn't remove %p\n", event); 2281 } 2282 } 2283 2284 int ceph_osdc_create_event(struct ceph_osd_client *osdc, 2285 void (*event_cb)(u64, u64, u8, void *), 2286 void *data, struct ceph_osd_event **pevent) 2287 { 2288 struct ceph_osd_event *event; 2289 2290 event = kmalloc(sizeof(*event), GFP_NOIO); 2291 if (!event) 2292 return -ENOMEM; 2293 2294 dout("create_event %p\n", event); 2295 event->cb = event_cb; 2296 event->one_shot = 0; 2297 event->data = data; 2298 event->osdc = osdc; 2299 INIT_LIST_HEAD(&event->osd_node); 2300 RB_CLEAR_NODE(&event->node); 2301 kref_init(&event->kref); /* one ref for us */ 2302 kref_get(&event->kref); /* one ref for the caller */ 2303 2304 spin_lock(&osdc->event_lock); 2305 event->cookie = ++osdc->event_count; 2306 __insert_event(osdc, event); 2307 spin_unlock(&osdc->event_lock); 2308 2309 *pevent = event; 2310 return 0; 2311 } 2312 EXPORT_SYMBOL(ceph_osdc_create_event); 2313 2314 void ceph_osdc_cancel_event(struct ceph_osd_event *event) 2315 { 2316 struct ceph_osd_client *osdc = event->osdc; 2317 2318 dout("cancel_event %p\n", event); 2319 spin_lock(&osdc->event_lock); 2320 __remove_event(event); 2321 spin_unlock(&osdc->event_lock); 2322 ceph_osdc_put_event(event); /* caller's */ 2323 } 2324 EXPORT_SYMBOL(ceph_osdc_cancel_event); 2325 2326 2327 static void do_event_work(struct work_struct *work) 2328 { 2329 struct ceph_osd_event_work *event_work = 2330 container_of(work, struct ceph_osd_event_work, work); 2331 struct ceph_osd_event *event = event_work->event; 2332 u64 ver = event_work->ver; 2333 u64 notify_id = event_work->notify_id; 2334 u8 opcode = event_work->opcode; 2335 2336 dout("do_event_work completing %p\n", event); 2337 event->cb(ver, notify_id, opcode, event->data); 2338 dout("do_event_work completed %p\n", event); 2339 ceph_osdc_put_event(event); 2340 kfree(event_work); 2341 } 2342 2343 2344 /* 2345 * Process osd watch notifications 2346 */ 2347 static void handle_watch_notify(struct ceph_osd_client *osdc, 2348 struct ceph_msg *msg) 2349 { 2350 void *p, *end; 2351 u8 proto_ver; 2352 u64 cookie, ver, notify_id; 2353 u8 opcode; 2354 struct ceph_osd_event *event; 2355 struct ceph_osd_event_work *event_work; 2356 2357 p = msg->front.iov_base; 2358 end = p + msg->front.iov_len; 2359 2360 ceph_decode_8_safe(&p, end, proto_ver, bad); 2361 ceph_decode_8_safe(&p, end, opcode, bad); 2362 ceph_decode_64_safe(&p, end, cookie, bad); 2363 ceph_decode_64_safe(&p, end, ver, bad); 2364 ceph_decode_64_safe(&p, end, notify_id, bad); 2365 2366 spin_lock(&osdc->event_lock); 2367 event = __find_event(osdc, cookie); 2368 if (event) { 2369 BUG_ON(event->one_shot); 2370 get_event(event); 2371 } 2372 spin_unlock(&osdc->event_lock); 2373 dout("handle_watch_notify cookie %lld ver %lld event %p\n", 2374 cookie, ver, event); 2375 if (event) { 2376 event_work = kmalloc(sizeof(*event_work), GFP_NOIO); 2377 if (!event_work) { 2378 pr_err("couldn't allocate event_work\n"); 2379 ceph_osdc_put_event(event); 2380 return; 2381 } 2382 INIT_WORK(&event_work->work, do_event_work); 2383 event_work->event = event; 2384 event_work->ver = ver; 2385 event_work->notify_id = notify_id; 2386 event_work->opcode = opcode; 2387 2388 queue_work(osdc->notify_wq, &event_work->work); 2389 } 2390 2391 return; 2392 2393 bad: 2394 pr_err("osdc handle_watch_notify corrupt msg\n"); 2395 } 2396 2397 /* 2398 * build new request AND message 2399 * 2400 */ 2401 void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, 2402 struct ceph_snap_context *snapc, u64 snap_id, 2403 struct timespec *mtime) 2404 { 2405 struct ceph_msg *msg = req->r_request; 2406 void *p; 2407 size_t msg_size; 2408 int flags = req->r_flags; 2409 u64 data_len; 2410 unsigned int i; 2411 2412 req->r_snapid = snap_id; 2413 req->r_snapc = ceph_get_snap_context(snapc); 2414 2415 /* encode request */ 2416 msg->hdr.version = cpu_to_le16(4); 2417 2418 p = msg->front.iov_base; 2419 ceph_encode_32(&p, 1); /* client_inc is always 1 */ 2420 req->r_request_osdmap_epoch = p; 2421 p += 4; 2422 req->r_request_flags = p; 2423 p += 4; 2424 if (req->r_flags & CEPH_OSD_FLAG_WRITE) 2425 ceph_encode_timespec(p, mtime); 2426 p += sizeof(struct ceph_timespec); 2427 req->r_request_reassert_version = p; 2428 p += sizeof(struct ceph_eversion); /* will get filled in */ 2429 2430 /* oloc */ 2431 ceph_encode_8(&p, 4); 2432 ceph_encode_8(&p, 4); 2433 ceph_encode_32(&p, 8 + 4 + 4); 2434 req->r_request_pool = p; 2435 p += 8; 2436 ceph_encode_32(&p, -1); /* preferred */ 2437 ceph_encode_32(&p, 0); /* key len */ 2438 2439 ceph_encode_8(&p, 1); 2440 req->r_request_pgid = p; 2441 p += 8 + 4; 2442 ceph_encode_32(&p, -1); /* preferred */ 2443 2444 /* oid */ 2445 ceph_encode_32(&p, req->r_base_oid.name_len); 2446 memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len); 2447 dout("oid '%.*s' len %d\n", req->r_base_oid.name_len, 2448 req->r_base_oid.name, req->r_base_oid.name_len); 2449 p += req->r_base_oid.name_len; 2450 2451 /* ops--can imply data */ 2452 ceph_encode_16(&p, (u16)req->r_num_ops); 2453 data_len = 0; 2454 for (i = 0; i < req->r_num_ops; i++) { 2455 data_len += osd_req_encode_op(req, p, i); 2456 p += sizeof(struct ceph_osd_op); 2457 } 2458 2459 /* snaps */ 2460 ceph_encode_64(&p, req->r_snapid); 2461 ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0); 2462 ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0); 2463 if (req->r_snapc) { 2464 for (i = 0; i < snapc->num_snaps; i++) { 2465 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2466 } 2467 } 2468 2469 req->r_request_attempts = p; 2470 p += 4; 2471 2472 /* data */ 2473 if (flags & CEPH_OSD_FLAG_WRITE) { 2474 u16 data_off; 2475 2476 /* 2477 * The header "data_off" is a hint to the receiver 2478 * allowing it to align received data into its 2479 * buffers such that there's no need to re-copy 2480 * it before writing it to disk (direct I/O). 2481 */ 2482 data_off = (u16) (off & 0xffff); 2483 req->r_request->hdr.data_off = cpu_to_le16(data_off); 2484 } 2485 req->r_request->hdr.data_len = cpu_to_le32(data_len); 2486 2487 BUG_ON(p > msg->front.iov_base + msg->front.iov_len); 2488 msg_size = p - msg->front.iov_base; 2489 msg->front.iov_len = msg_size; 2490 msg->hdr.front_len = cpu_to_le32(msg_size); 2491 2492 dout("build_request msg_size was %d\n", (int)msg_size); 2493 } 2494 EXPORT_SYMBOL(ceph_osdc_build_request); 2495 2496 /* 2497 * Register request, send initial attempt. 2498 */ 2499 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 2500 struct ceph_osd_request *req, 2501 bool nofail) 2502 { 2503 int rc; 2504 2505 down_read(&osdc->map_sem); 2506 mutex_lock(&osdc->request_mutex); 2507 2508 rc = __ceph_osdc_start_request(osdc, req, nofail); 2509 2510 mutex_unlock(&osdc->request_mutex); 2511 up_read(&osdc->map_sem); 2512 2513 return rc; 2514 } 2515 EXPORT_SYMBOL(ceph_osdc_start_request); 2516 2517 /* 2518 * Unregister a registered request. The request is not completed (i.e. 2519 * no callbacks or wakeups) - higher layers are supposed to know what 2520 * they are canceling. 2521 */ 2522 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 2523 { 2524 struct ceph_osd_client *osdc = req->r_osdc; 2525 2526 mutex_lock(&osdc->request_mutex); 2527 if (req->r_linger) 2528 __unregister_linger_request(osdc, req); 2529 __unregister_request(osdc, req); 2530 mutex_unlock(&osdc->request_mutex); 2531 2532 dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid); 2533 } 2534 EXPORT_SYMBOL(ceph_osdc_cancel_request); 2535 2536 /* 2537 * wait for a request to complete 2538 */ 2539 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 2540 struct ceph_osd_request *req) 2541 { 2542 int rc; 2543 2544 dout("%s %p tid %llu\n", __func__, req, req->r_tid); 2545 2546 rc = wait_for_completion_interruptible(&req->r_completion); 2547 if (rc < 0) { 2548 dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid); 2549 ceph_osdc_cancel_request(req); 2550 complete_request(req); 2551 return rc; 2552 } 2553 2554 dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid, 2555 req->r_result); 2556 return req->r_result; 2557 } 2558 EXPORT_SYMBOL(ceph_osdc_wait_request); 2559 2560 /* 2561 * sync - wait for all in-flight requests to flush. avoid starvation. 2562 */ 2563 void ceph_osdc_sync(struct ceph_osd_client *osdc) 2564 { 2565 struct ceph_osd_request *req; 2566 u64 last_tid, next_tid = 0; 2567 2568 mutex_lock(&osdc->request_mutex); 2569 last_tid = osdc->last_tid; 2570 while (1) { 2571 req = __lookup_request_ge(osdc, next_tid); 2572 if (!req) 2573 break; 2574 if (req->r_tid > last_tid) 2575 break; 2576 2577 next_tid = req->r_tid + 1; 2578 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) 2579 continue; 2580 2581 ceph_osdc_get_request(req); 2582 mutex_unlock(&osdc->request_mutex); 2583 dout("sync waiting on tid %llu (last is %llu)\n", 2584 req->r_tid, last_tid); 2585 wait_for_completion(&req->r_safe_completion); 2586 mutex_lock(&osdc->request_mutex); 2587 ceph_osdc_put_request(req); 2588 } 2589 mutex_unlock(&osdc->request_mutex); 2590 dout("sync done (thru tid %llu)\n", last_tid); 2591 } 2592 EXPORT_SYMBOL(ceph_osdc_sync); 2593 2594 /* 2595 * Call all pending notify callbacks - for use after a watch is 2596 * unregistered, to make sure no more callbacks for it will be invoked 2597 */ 2598 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 2599 { 2600 flush_workqueue(osdc->notify_wq); 2601 } 2602 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 2603 2604 2605 /* 2606 * init, shutdown 2607 */ 2608 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 2609 { 2610 int err; 2611 2612 dout("init\n"); 2613 osdc->client = client; 2614 osdc->osdmap = NULL; 2615 init_rwsem(&osdc->map_sem); 2616 init_completion(&osdc->map_waiters); 2617 osdc->last_requested_map = 0; 2618 mutex_init(&osdc->request_mutex); 2619 osdc->last_tid = 0; 2620 osdc->osds = RB_ROOT; 2621 INIT_LIST_HEAD(&osdc->osd_lru); 2622 osdc->requests = RB_ROOT; 2623 INIT_LIST_HEAD(&osdc->req_lru); 2624 INIT_LIST_HEAD(&osdc->req_unsent); 2625 INIT_LIST_HEAD(&osdc->req_notarget); 2626 INIT_LIST_HEAD(&osdc->req_linger); 2627 osdc->num_requests = 0; 2628 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 2629 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 2630 spin_lock_init(&osdc->event_lock); 2631 osdc->event_tree = RB_ROOT; 2632 osdc->event_count = 0; 2633 2634 schedule_delayed_work(&osdc->osds_timeout_work, 2635 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 2636 2637 err = -ENOMEM; 2638 osdc->req_mempool = mempool_create_kmalloc_pool(10, 2639 sizeof(struct ceph_osd_request)); 2640 if (!osdc->req_mempool) 2641 goto out; 2642 2643 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 2644 OSD_OP_FRONT_LEN, 10, true, 2645 "osd_op"); 2646 if (err < 0) 2647 goto out_mempool; 2648 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 2649 OSD_OPREPLY_FRONT_LEN, 10, true, 2650 "osd_op_reply"); 2651 if (err < 0) 2652 goto out_msgpool; 2653 2654 err = -ENOMEM; 2655 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 2656 if (!osdc->notify_wq) 2657 goto out_msgpool_reply; 2658 2659 return 0; 2660 2661 out_msgpool_reply: 2662 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2663 out_msgpool: 2664 ceph_msgpool_destroy(&osdc->msgpool_op); 2665 out_mempool: 2666 mempool_destroy(osdc->req_mempool); 2667 out: 2668 return err; 2669 } 2670 2671 void ceph_osdc_stop(struct ceph_osd_client *osdc) 2672 { 2673 flush_workqueue(osdc->notify_wq); 2674 destroy_workqueue(osdc->notify_wq); 2675 cancel_delayed_work_sync(&osdc->timeout_work); 2676 cancel_delayed_work_sync(&osdc->osds_timeout_work); 2677 if (osdc->osdmap) { 2678 ceph_osdmap_destroy(osdc->osdmap); 2679 osdc->osdmap = NULL; 2680 } 2681 remove_all_osds(osdc); 2682 mempool_destroy(osdc->req_mempool); 2683 ceph_msgpool_destroy(&osdc->msgpool_op); 2684 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 2685 } 2686 2687 /* 2688 * Read some contiguous pages. If we cross a stripe boundary, shorten 2689 * *plen. Return number of bytes read, or error. 2690 */ 2691 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 2692 struct ceph_vino vino, struct ceph_file_layout *layout, 2693 u64 off, u64 *plen, 2694 u32 truncate_seq, u64 truncate_size, 2695 struct page **pages, int num_pages, int page_align) 2696 { 2697 struct ceph_osd_request *req; 2698 int rc = 0; 2699 2700 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 2701 vino.snap, off, *plen); 2702 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 2703 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 2704 NULL, truncate_seq, truncate_size, 2705 false); 2706 if (IS_ERR(req)) 2707 return PTR_ERR(req); 2708 2709 /* it may be a short read due to an object boundary */ 2710 2711 osd_req_op_extent_osd_data_pages(req, 0, 2712 pages, *plen, page_align, false, false); 2713 2714 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 2715 off, *plen, *plen, page_align); 2716 2717 ceph_osdc_build_request(req, off, NULL, vino.snap, NULL); 2718 2719 rc = ceph_osdc_start_request(osdc, req, false); 2720 if (!rc) 2721 rc = ceph_osdc_wait_request(osdc, req); 2722 2723 ceph_osdc_put_request(req); 2724 dout("readpages result %d\n", rc); 2725 return rc; 2726 } 2727 EXPORT_SYMBOL(ceph_osdc_readpages); 2728 2729 /* 2730 * do a synchronous write on N pages 2731 */ 2732 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 2733 struct ceph_file_layout *layout, 2734 struct ceph_snap_context *snapc, 2735 u64 off, u64 len, 2736 u32 truncate_seq, u64 truncate_size, 2737 struct timespec *mtime, 2738 struct page **pages, int num_pages) 2739 { 2740 struct ceph_osd_request *req; 2741 int rc = 0; 2742 int page_align = off & ~PAGE_MASK; 2743 2744 BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */ 2745 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 2746 CEPH_OSD_OP_WRITE, 2747 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 2748 snapc, truncate_seq, truncate_size, 2749 true); 2750 if (IS_ERR(req)) 2751 return PTR_ERR(req); 2752 2753 /* it may be a short write due to an object boundary */ 2754 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 2755 false, false); 2756 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 2757 2758 ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime); 2759 2760 rc = ceph_osdc_start_request(osdc, req, true); 2761 if (!rc) 2762 rc = ceph_osdc_wait_request(osdc, req); 2763 2764 ceph_osdc_put_request(req); 2765 if (rc == 0) 2766 rc = len; 2767 dout("writepages result %d\n", rc); 2768 return rc; 2769 } 2770 EXPORT_SYMBOL(ceph_osdc_writepages); 2771 2772 int ceph_osdc_setup(void) 2773 { 2774 BUG_ON(ceph_osd_request_cache); 2775 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", 2776 sizeof (struct ceph_osd_request), 2777 __alignof__(struct ceph_osd_request), 2778 0, NULL); 2779 2780 return ceph_osd_request_cache ? 0 : -ENOMEM; 2781 } 2782 EXPORT_SYMBOL(ceph_osdc_setup); 2783 2784 void ceph_osdc_cleanup(void) 2785 { 2786 BUG_ON(!ceph_osd_request_cache); 2787 kmem_cache_destroy(ceph_osd_request_cache); 2788 ceph_osd_request_cache = NULL; 2789 } 2790 EXPORT_SYMBOL(ceph_osdc_cleanup); 2791 2792 /* 2793 * handle incoming message 2794 */ 2795 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 2796 { 2797 struct ceph_osd *osd = con->private; 2798 struct ceph_osd_client *osdc; 2799 int type = le16_to_cpu(msg->hdr.type); 2800 2801 if (!osd) 2802 goto out; 2803 osdc = osd->o_osdc; 2804 2805 switch (type) { 2806 case CEPH_MSG_OSD_MAP: 2807 ceph_osdc_handle_map(osdc, msg); 2808 break; 2809 case CEPH_MSG_OSD_OPREPLY: 2810 handle_reply(osdc, msg, con); 2811 break; 2812 case CEPH_MSG_WATCH_NOTIFY: 2813 handle_watch_notify(osdc, msg); 2814 break; 2815 2816 default: 2817 pr_err("received unknown message type %d %s\n", type, 2818 ceph_msg_type_name(type)); 2819 } 2820 out: 2821 ceph_msg_put(msg); 2822 } 2823 2824 /* 2825 * Lookup and return message for incoming reply. Don't try to do 2826 * anything about a larger than preallocated data portion of the 2827 * message at the moment - for now, just skip the message. 2828 */ 2829 static struct ceph_msg *get_reply(struct ceph_connection *con, 2830 struct ceph_msg_header *hdr, 2831 int *skip) 2832 { 2833 struct ceph_osd *osd = con->private; 2834 struct ceph_osd_client *osdc = osd->o_osdc; 2835 struct ceph_msg *m; 2836 struct ceph_osd_request *req; 2837 int front_len = le32_to_cpu(hdr->front_len); 2838 int data_len = le32_to_cpu(hdr->data_len); 2839 u64 tid; 2840 2841 tid = le64_to_cpu(hdr->tid); 2842 mutex_lock(&osdc->request_mutex); 2843 req = __lookup_request(osdc, tid); 2844 if (!req) { 2845 pr_warn("%s osd%d tid %llu unknown, skipping\n", 2846 __func__, osd->o_osd, tid); 2847 m = NULL; 2848 *skip = 1; 2849 goto out; 2850 } 2851 2852 if (req->r_reply->con) 2853 dout("%s revoking msg %p from old con %p\n", __func__, 2854 req->r_reply, req->r_reply->con); 2855 ceph_msg_revoke_incoming(req->r_reply); 2856 2857 if (front_len > req->r_reply->front_alloc_len) { 2858 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 2859 __func__, osd->o_osd, req->r_tid, front_len, 2860 req->r_reply->front_alloc_len); 2861 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 2862 false); 2863 if (!m) 2864 goto out; 2865 ceph_msg_put(req->r_reply); 2866 req->r_reply = m; 2867 } 2868 2869 if (data_len > req->r_reply->data_length) { 2870 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 2871 __func__, osd->o_osd, req->r_tid, data_len, 2872 req->r_reply->data_length); 2873 m = NULL; 2874 *skip = 1; 2875 goto out; 2876 } 2877 2878 m = ceph_msg_get(req->r_reply); 2879 dout("get_reply tid %lld %p\n", tid, m); 2880 2881 out: 2882 mutex_unlock(&osdc->request_mutex); 2883 return m; 2884 } 2885 2886 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 2887 struct ceph_msg_header *hdr, 2888 int *skip) 2889 { 2890 struct ceph_osd *osd = con->private; 2891 int type = le16_to_cpu(hdr->type); 2892 int front = le32_to_cpu(hdr->front_len); 2893 2894 *skip = 0; 2895 switch (type) { 2896 case CEPH_MSG_OSD_MAP: 2897 case CEPH_MSG_WATCH_NOTIFY: 2898 return ceph_msg_new(type, front, GFP_NOFS, false); 2899 case CEPH_MSG_OSD_OPREPLY: 2900 return get_reply(con, hdr, skip); 2901 default: 2902 pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, 2903 osd->o_osd); 2904 *skip = 1; 2905 return NULL; 2906 } 2907 } 2908 2909 /* 2910 * Wrappers to refcount containing ceph_osd struct 2911 */ 2912 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 2913 { 2914 struct ceph_osd *osd = con->private; 2915 if (get_osd(osd)) 2916 return con; 2917 return NULL; 2918 } 2919 2920 static void put_osd_con(struct ceph_connection *con) 2921 { 2922 struct ceph_osd *osd = con->private; 2923 put_osd(osd); 2924 } 2925 2926 /* 2927 * authentication 2928 */ 2929 /* 2930 * Note: returned pointer is the address of a structure that's 2931 * managed separately. Caller must *not* attempt to free it. 2932 */ 2933 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 2934 int *proto, int force_new) 2935 { 2936 struct ceph_osd *o = con->private; 2937 struct ceph_osd_client *osdc = o->o_osdc; 2938 struct ceph_auth_client *ac = osdc->client->monc.auth; 2939 struct ceph_auth_handshake *auth = &o->o_auth; 2940 2941 if (force_new && auth->authorizer) { 2942 ceph_auth_destroy_authorizer(ac, auth->authorizer); 2943 auth->authorizer = NULL; 2944 } 2945 if (!auth->authorizer) { 2946 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2947 auth); 2948 if (ret) 2949 return ERR_PTR(ret); 2950 } else { 2951 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 2952 auth); 2953 if (ret) 2954 return ERR_PTR(ret); 2955 } 2956 *proto = ac->protocol; 2957 2958 return auth; 2959 } 2960 2961 2962 static int verify_authorizer_reply(struct ceph_connection *con, int len) 2963 { 2964 struct ceph_osd *o = con->private; 2965 struct ceph_osd_client *osdc = o->o_osdc; 2966 struct ceph_auth_client *ac = osdc->client->monc.auth; 2967 2968 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); 2969 } 2970 2971 static int invalidate_authorizer(struct ceph_connection *con) 2972 { 2973 struct ceph_osd *o = con->private; 2974 struct ceph_osd_client *osdc = o->o_osdc; 2975 struct ceph_auth_client *ac = osdc->client->monc.auth; 2976 2977 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 2978 return ceph_monc_validate_auth(&osdc->client->monc); 2979 } 2980 2981 static int sign_message(struct ceph_connection *con, struct ceph_msg *msg) 2982 { 2983 struct ceph_osd *o = con->private; 2984 struct ceph_auth_handshake *auth = &o->o_auth; 2985 return ceph_auth_sign_message(auth, msg); 2986 } 2987 2988 static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg) 2989 { 2990 struct ceph_osd *o = con->private; 2991 struct ceph_auth_handshake *auth = &o->o_auth; 2992 return ceph_auth_check_message_signature(auth, msg); 2993 } 2994 2995 static const struct ceph_connection_operations osd_con_ops = { 2996 .get = get_osd_con, 2997 .put = put_osd_con, 2998 .dispatch = dispatch, 2999 .get_authorizer = get_authorizer, 3000 .verify_authorizer_reply = verify_authorizer_reply, 3001 .invalidate_authorizer = invalidate_authorizer, 3002 .alloc_msg = alloc_msg, 3003 .sign_message = sign_message, 3004 .check_message_signature = check_message_signature, 3005 .fault = osd_reset, 3006 }; 3007