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