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_OPREPLY_FRONT_LEN 512 23 24 static struct kmem_cache *ceph_osd_request_cache; 25 26 static const struct ceph_connection_operations osd_con_ops; 27 28 /* 29 * Implement client access to distributed object storage cluster. 30 * 31 * All data objects are stored within a cluster/cloud of OSDs, or 32 * "object storage devices." (Note that Ceph OSDs have _nothing_ to 33 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply 34 * remote daemons serving up and coordinating consistent and safe 35 * access to storage. 36 * 37 * Cluster membership and the mapping of data objects onto storage devices 38 * are described by the osd map. 39 * 40 * We keep track of pending OSD requests (read, write), resubmit 41 * requests to different OSDs when the cluster topology/data layout 42 * change, or retry the affected requests when the communications 43 * channel with an OSD is reset. 44 */ 45 46 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req); 47 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req); 48 static void link_linger(struct ceph_osd *osd, 49 struct ceph_osd_linger_request *lreq); 50 static void unlink_linger(struct ceph_osd *osd, 51 struct ceph_osd_linger_request *lreq); 52 53 #if 1 54 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem) 55 { 56 bool wrlocked = true; 57 58 if (unlikely(down_read_trylock(sem))) { 59 wrlocked = false; 60 up_read(sem); 61 } 62 63 return wrlocked; 64 } 65 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) 66 { 67 WARN_ON(!rwsem_is_locked(&osdc->lock)); 68 } 69 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) 70 { 71 WARN_ON(!rwsem_is_wrlocked(&osdc->lock)); 72 } 73 static inline void verify_osd_locked(struct ceph_osd *osd) 74 { 75 struct ceph_osd_client *osdc = osd->o_osdc; 76 77 WARN_ON(!(mutex_is_locked(&osd->lock) && 78 rwsem_is_locked(&osdc->lock)) && 79 !rwsem_is_wrlocked(&osdc->lock)); 80 } 81 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) 82 { 83 WARN_ON(!mutex_is_locked(&lreq->lock)); 84 } 85 #else 86 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { } 87 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { } 88 static inline void verify_osd_locked(struct ceph_osd *osd) { } 89 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { } 90 #endif 91 92 /* 93 * calculate the mapping of a file extent onto an object, and fill out the 94 * request accordingly. shorten extent as necessary if it crosses an 95 * object boundary. 96 * 97 * fill osd op in request message. 98 */ 99 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, 100 u64 *objnum, u64 *objoff, u64 *objlen) 101 { 102 u64 orig_len = *plen; 103 int r; 104 105 /* object extent? */ 106 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum, 107 objoff, objlen); 108 if (r < 0) 109 return r; 110 if (*objlen < orig_len) { 111 *plen = *objlen; 112 dout(" skipping last %llu, final file extent %llu~%llu\n", 113 orig_len - *plen, off, *plen); 114 } 115 116 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); 117 118 return 0; 119 } 120 121 static void ceph_osd_data_init(struct ceph_osd_data *osd_data) 122 { 123 memset(osd_data, 0, sizeof (*osd_data)); 124 osd_data->type = CEPH_OSD_DATA_TYPE_NONE; 125 } 126 127 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data, 128 struct page **pages, u64 length, u32 alignment, 129 bool pages_from_pool, bool own_pages) 130 { 131 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; 132 osd_data->pages = pages; 133 osd_data->length = length; 134 osd_data->alignment = alignment; 135 osd_data->pages_from_pool = pages_from_pool; 136 osd_data->own_pages = own_pages; 137 } 138 139 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, 140 struct ceph_pagelist *pagelist) 141 { 142 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST; 143 osd_data->pagelist = pagelist; 144 } 145 146 #ifdef CONFIG_BLOCK 147 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, 148 struct bio *bio, size_t bio_length) 149 { 150 osd_data->type = CEPH_OSD_DATA_TYPE_BIO; 151 osd_data->bio = bio; 152 osd_data->bio_length = bio_length; 153 } 154 #endif /* CONFIG_BLOCK */ 155 156 #define osd_req_op_data(oreq, whch, typ, fld) \ 157 ({ \ 158 struct ceph_osd_request *__oreq = (oreq); \ 159 unsigned int __whch = (whch); \ 160 BUG_ON(__whch >= __oreq->r_num_ops); \ 161 &__oreq->r_ops[__whch].typ.fld; \ 162 }) 163 164 static struct ceph_osd_data * 165 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) 166 { 167 BUG_ON(which >= osd_req->r_num_ops); 168 169 return &osd_req->r_ops[which].raw_data_in; 170 } 171 172 struct ceph_osd_data * 173 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, 174 unsigned int which) 175 { 176 return osd_req_op_data(osd_req, which, extent, osd_data); 177 } 178 EXPORT_SYMBOL(osd_req_op_extent_osd_data); 179 180 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, 181 unsigned int which, struct page **pages, 182 u64 length, u32 alignment, 183 bool pages_from_pool, bool own_pages) 184 { 185 struct ceph_osd_data *osd_data; 186 187 osd_data = osd_req_op_raw_data_in(osd_req, which); 188 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 189 pages_from_pool, own_pages); 190 } 191 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); 192 193 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, 194 unsigned int which, struct page **pages, 195 u64 length, u32 alignment, 196 bool pages_from_pool, bool own_pages) 197 { 198 struct ceph_osd_data *osd_data; 199 200 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 201 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 202 pages_from_pool, own_pages); 203 } 204 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); 205 206 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, 207 unsigned int which, struct ceph_pagelist *pagelist) 208 { 209 struct ceph_osd_data *osd_data; 210 211 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 212 ceph_osd_data_pagelist_init(osd_data, pagelist); 213 } 214 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); 215 216 #ifdef CONFIG_BLOCK 217 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 218 unsigned int which, struct bio *bio, size_t bio_length) 219 { 220 struct ceph_osd_data *osd_data; 221 222 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 223 ceph_osd_data_bio_init(osd_data, bio, bio_length); 224 } 225 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); 226 #endif /* CONFIG_BLOCK */ 227 228 static void osd_req_op_cls_request_info_pagelist( 229 struct ceph_osd_request *osd_req, 230 unsigned int which, struct ceph_pagelist *pagelist) 231 { 232 struct ceph_osd_data *osd_data; 233 234 osd_data = osd_req_op_data(osd_req, which, cls, request_info); 235 ceph_osd_data_pagelist_init(osd_data, pagelist); 236 } 237 238 void osd_req_op_cls_request_data_pagelist( 239 struct ceph_osd_request *osd_req, 240 unsigned int which, struct ceph_pagelist *pagelist) 241 { 242 struct ceph_osd_data *osd_data; 243 244 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 245 ceph_osd_data_pagelist_init(osd_data, pagelist); 246 osd_req->r_ops[which].cls.indata_len += pagelist->length; 247 osd_req->r_ops[which].indata_len += pagelist->length; 248 } 249 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); 250 251 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, 252 unsigned int which, struct page **pages, u64 length, 253 u32 alignment, bool pages_from_pool, bool own_pages) 254 { 255 struct ceph_osd_data *osd_data; 256 257 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 258 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 259 pages_from_pool, own_pages); 260 osd_req->r_ops[which].cls.indata_len += length; 261 osd_req->r_ops[which].indata_len += length; 262 } 263 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); 264 265 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, 266 unsigned int which, struct page **pages, u64 length, 267 u32 alignment, bool pages_from_pool, bool own_pages) 268 { 269 struct ceph_osd_data *osd_data; 270 271 osd_data = osd_req_op_data(osd_req, which, cls, response_data); 272 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 273 pages_from_pool, own_pages); 274 } 275 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); 276 277 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) 278 { 279 switch (osd_data->type) { 280 case CEPH_OSD_DATA_TYPE_NONE: 281 return 0; 282 case CEPH_OSD_DATA_TYPE_PAGES: 283 return osd_data->length; 284 case CEPH_OSD_DATA_TYPE_PAGELIST: 285 return (u64)osd_data->pagelist->length; 286 #ifdef CONFIG_BLOCK 287 case CEPH_OSD_DATA_TYPE_BIO: 288 return (u64)osd_data->bio_length; 289 #endif /* CONFIG_BLOCK */ 290 default: 291 WARN(true, "unrecognized data type %d\n", (int)osd_data->type); 292 return 0; 293 } 294 } 295 296 static void ceph_osd_data_release(struct ceph_osd_data *osd_data) 297 { 298 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { 299 int num_pages; 300 301 num_pages = calc_pages_for((u64)osd_data->alignment, 302 (u64)osd_data->length); 303 ceph_release_page_vector(osd_data->pages, num_pages); 304 } 305 ceph_osd_data_init(osd_data); 306 } 307 308 static void osd_req_op_data_release(struct ceph_osd_request *osd_req, 309 unsigned int which) 310 { 311 struct ceph_osd_req_op *op; 312 313 BUG_ON(which >= osd_req->r_num_ops); 314 op = &osd_req->r_ops[which]; 315 316 switch (op->op) { 317 case CEPH_OSD_OP_READ: 318 case CEPH_OSD_OP_WRITE: 319 case CEPH_OSD_OP_WRITEFULL: 320 ceph_osd_data_release(&op->extent.osd_data); 321 break; 322 case CEPH_OSD_OP_CALL: 323 ceph_osd_data_release(&op->cls.request_info); 324 ceph_osd_data_release(&op->cls.request_data); 325 ceph_osd_data_release(&op->cls.response_data); 326 break; 327 case CEPH_OSD_OP_SETXATTR: 328 case CEPH_OSD_OP_CMPXATTR: 329 ceph_osd_data_release(&op->xattr.osd_data); 330 break; 331 case CEPH_OSD_OP_STAT: 332 ceph_osd_data_release(&op->raw_data_in); 333 break; 334 case CEPH_OSD_OP_NOTIFY_ACK: 335 ceph_osd_data_release(&op->notify_ack.request_data); 336 break; 337 case CEPH_OSD_OP_NOTIFY: 338 ceph_osd_data_release(&op->notify.request_data); 339 ceph_osd_data_release(&op->notify.response_data); 340 break; 341 default: 342 break; 343 } 344 } 345 346 /* 347 * Assumes @t is zero-initialized. 348 */ 349 static void target_init(struct ceph_osd_request_target *t) 350 { 351 ceph_oid_init(&t->base_oid); 352 ceph_oloc_init(&t->base_oloc); 353 ceph_oid_init(&t->target_oid); 354 ceph_oloc_init(&t->target_oloc); 355 356 ceph_osds_init(&t->acting); 357 ceph_osds_init(&t->up); 358 t->size = -1; 359 t->min_size = -1; 360 361 t->osd = CEPH_HOMELESS_OSD; 362 } 363 364 static void target_copy(struct ceph_osd_request_target *dest, 365 const struct ceph_osd_request_target *src) 366 { 367 ceph_oid_copy(&dest->base_oid, &src->base_oid); 368 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc); 369 ceph_oid_copy(&dest->target_oid, &src->target_oid); 370 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc); 371 372 dest->pgid = src->pgid; /* struct */ 373 dest->pg_num = src->pg_num; 374 dest->pg_num_mask = src->pg_num_mask; 375 ceph_osds_copy(&dest->acting, &src->acting); 376 ceph_osds_copy(&dest->up, &src->up); 377 dest->size = src->size; 378 dest->min_size = src->min_size; 379 dest->sort_bitwise = src->sort_bitwise; 380 381 dest->flags = src->flags; 382 dest->paused = src->paused; 383 384 dest->osd = src->osd; 385 } 386 387 static void target_destroy(struct ceph_osd_request_target *t) 388 { 389 ceph_oid_destroy(&t->base_oid); 390 ceph_oid_destroy(&t->target_oid); 391 } 392 393 /* 394 * requests 395 */ 396 static void request_release_checks(struct ceph_osd_request *req) 397 { 398 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 399 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node)); 400 WARN_ON(!list_empty(&req->r_unsafe_item)); 401 WARN_ON(req->r_osd); 402 } 403 404 static void ceph_osdc_release_request(struct kref *kref) 405 { 406 struct ceph_osd_request *req = container_of(kref, 407 struct ceph_osd_request, r_kref); 408 unsigned int which; 409 410 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 411 req->r_request, req->r_reply); 412 request_release_checks(req); 413 414 if (req->r_request) 415 ceph_msg_put(req->r_request); 416 if (req->r_reply) 417 ceph_msg_put(req->r_reply); 418 419 for (which = 0; which < req->r_num_ops; which++) 420 osd_req_op_data_release(req, which); 421 422 target_destroy(&req->r_t); 423 ceph_put_snap_context(req->r_snapc); 424 425 if (req->r_mempool) 426 mempool_free(req, req->r_osdc->req_mempool); 427 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) 428 kmem_cache_free(ceph_osd_request_cache, req); 429 else 430 kfree(req); 431 } 432 433 void ceph_osdc_get_request(struct ceph_osd_request *req) 434 { 435 dout("%s %p (was %d)\n", __func__, req, 436 atomic_read(&req->r_kref.refcount)); 437 kref_get(&req->r_kref); 438 } 439 EXPORT_SYMBOL(ceph_osdc_get_request); 440 441 void ceph_osdc_put_request(struct ceph_osd_request *req) 442 { 443 if (req) { 444 dout("%s %p (was %d)\n", __func__, req, 445 atomic_read(&req->r_kref.refcount)); 446 kref_put(&req->r_kref, ceph_osdc_release_request); 447 } 448 } 449 EXPORT_SYMBOL(ceph_osdc_put_request); 450 451 static void request_init(struct ceph_osd_request *req) 452 { 453 /* req only, each op is zeroed in _osd_req_op_init() */ 454 memset(req, 0, sizeof(*req)); 455 456 kref_init(&req->r_kref); 457 init_completion(&req->r_completion); 458 init_completion(&req->r_safe_completion); 459 RB_CLEAR_NODE(&req->r_node); 460 RB_CLEAR_NODE(&req->r_mc_node); 461 INIT_LIST_HEAD(&req->r_unsafe_item); 462 463 target_init(&req->r_t); 464 } 465 466 /* 467 * This is ugly, but it allows us to reuse linger registration and ping 468 * requests, keeping the structure of the code around send_linger{_ping}() 469 * reasonable. Setting up a min_nr=2 mempool for each linger request 470 * and dealing with copying ops (this blasts req only, watch op remains 471 * intact) isn't any better. 472 */ 473 static void request_reinit(struct ceph_osd_request *req) 474 { 475 struct ceph_osd_client *osdc = req->r_osdc; 476 bool mempool = req->r_mempool; 477 unsigned int num_ops = req->r_num_ops; 478 u64 snapid = req->r_snapid; 479 struct ceph_snap_context *snapc = req->r_snapc; 480 bool linger = req->r_linger; 481 struct ceph_msg *request_msg = req->r_request; 482 struct ceph_msg *reply_msg = req->r_reply; 483 484 dout("%s req %p\n", __func__, req); 485 WARN_ON(atomic_read(&req->r_kref.refcount) != 1); 486 request_release_checks(req); 487 488 WARN_ON(atomic_read(&request_msg->kref.refcount) != 1); 489 WARN_ON(atomic_read(&reply_msg->kref.refcount) != 1); 490 target_destroy(&req->r_t); 491 492 request_init(req); 493 req->r_osdc = osdc; 494 req->r_mempool = mempool; 495 req->r_num_ops = num_ops; 496 req->r_snapid = snapid; 497 req->r_snapc = snapc; 498 req->r_linger = linger; 499 req->r_request = request_msg; 500 req->r_reply = reply_msg; 501 } 502 503 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 504 struct ceph_snap_context *snapc, 505 unsigned int num_ops, 506 bool use_mempool, 507 gfp_t gfp_flags) 508 { 509 struct ceph_osd_request *req; 510 511 if (use_mempool) { 512 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 513 req = mempool_alloc(osdc->req_mempool, gfp_flags); 514 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 515 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 516 } else { 517 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 518 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]), 519 gfp_flags); 520 } 521 if (unlikely(!req)) 522 return NULL; 523 524 request_init(req); 525 req->r_osdc = osdc; 526 req->r_mempool = use_mempool; 527 req->r_num_ops = num_ops; 528 req->r_snapid = CEPH_NOSNAP; 529 req->r_snapc = ceph_get_snap_context(snapc); 530 531 dout("%s req %p\n", __func__, req); 532 return req; 533 } 534 EXPORT_SYMBOL(ceph_osdc_alloc_request); 535 536 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 537 { 538 struct ceph_osd_client *osdc = req->r_osdc; 539 struct ceph_msg *msg; 540 int msg_size; 541 542 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 543 544 /* create request message */ 545 msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */ 546 msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */ 547 msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */ 548 msg_size += 1 + 8 + 4 + 4; /* pgid */ 549 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 550 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 551 msg_size += 8; /* snapid */ 552 msg_size += 8; /* snap_seq */ 553 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 554 msg_size += 4; /* retry_attempt */ 555 556 if (req->r_mempool) 557 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 558 else 559 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true); 560 if (!msg) 561 return -ENOMEM; 562 563 memset(msg->front.iov_base, 0, msg->front.iov_len); 564 req->r_request = msg; 565 566 /* create reply message */ 567 msg_size = OSD_OPREPLY_FRONT_LEN; 568 msg_size += req->r_base_oid.name_len; 569 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 570 571 if (req->r_mempool) 572 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 573 else 574 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true); 575 if (!msg) 576 return -ENOMEM; 577 578 req->r_reply = msg; 579 580 return 0; 581 } 582 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 583 584 static bool osd_req_opcode_valid(u16 opcode) 585 { 586 switch (opcode) { 587 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 588 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 589 #undef GENERATE_CASE 590 default: 591 return false; 592 } 593 } 594 595 /* 596 * This is an osd op init function for opcodes that have no data or 597 * other information associated with them. It also serves as a 598 * common init routine for all the other init functions, below. 599 */ 600 static struct ceph_osd_req_op * 601 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 602 u16 opcode, u32 flags) 603 { 604 struct ceph_osd_req_op *op; 605 606 BUG_ON(which >= osd_req->r_num_ops); 607 BUG_ON(!osd_req_opcode_valid(opcode)); 608 609 op = &osd_req->r_ops[which]; 610 memset(op, 0, sizeof (*op)); 611 op->op = opcode; 612 op->flags = flags; 613 614 return op; 615 } 616 617 void osd_req_op_init(struct ceph_osd_request *osd_req, 618 unsigned int which, u16 opcode, u32 flags) 619 { 620 (void)_osd_req_op_init(osd_req, which, opcode, flags); 621 } 622 EXPORT_SYMBOL(osd_req_op_init); 623 624 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 625 unsigned int which, u16 opcode, 626 u64 offset, u64 length, 627 u64 truncate_size, u32 truncate_seq) 628 { 629 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 630 opcode, 0); 631 size_t payload_len = 0; 632 633 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 634 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 635 opcode != CEPH_OSD_OP_TRUNCATE); 636 637 op->extent.offset = offset; 638 op->extent.length = length; 639 op->extent.truncate_size = truncate_size; 640 op->extent.truncate_seq = truncate_seq; 641 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 642 payload_len += length; 643 644 op->indata_len = payload_len; 645 } 646 EXPORT_SYMBOL(osd_req_op_extent_init); 647 648 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 649 unsigned int which, u64 length) 650 { 651 struct ceph_osd_req_op *op; 652 u64 previous; 653 654 BUG_ON(which >= osd_req->r_num_ops); 655 op = &osd_req->r_ops[which]; 656 previous = op->extent.length; 657 658 if (length == previous) 659 return; /* Nothing to do */ 660 BUG_ON(length > previous); 661 662 op->extent.length = length; 663 op->indata_len -= previous - length; 664 } 665 EXPORT_SYMBOL(osd_req_op_extent_update); 666 667 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 668 unsigned int which, u64 offset_inc) 669 { 670 struct ceph_osd_req_op *op, *prev_op; 671 672 BUG_ON(which + 1 >= osd_req->r_num_ops); 673 674 prev_op = &osd_req->r_ops[which]; 675 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 676 /* dup previous one */ 677 op->indata_len = prev_op->indata_len; 678 op->outdata_len = prev_op->outdata_len; 679 op->extent = prev_op->extent; 680 /* adjust offset */ 681 op->extent.offset += offset_inc; 682 op->extent.length -= offset_inc; 683 684 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 685 op->indata_len -= offset_inc; 686 } 687 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 688 689 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 690 u16 opcode, const char *class, const char *method) 691 { 692 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 693 opcode, 0); 694 struct ceph_pagelist *pagelist; 695 size_t payload_len = 0; 696 size_t size; 697 698 BUG_ON(opcode != CEPH_OSD_OP_CALL); 699 700 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 701 BUG_ON(!pagelist); 702 ceph_pagelist_init(pagelist); 703 704 op->cls.class_name = class; 705 size = strlen(class); 706 BUG_ON(size > (size_t) U8_MAX); 707 op->cls.class_len = size; 708 ceph_pagelist_append(pagelist, class, size); 709 payload_len += size; 710 711 op->cls.method_name = method; 712 size = strlen(method); 713 BUG_ON(size > (size_t) U8_MAX); 714 op->cls.method_len = size; 715 ceph_pagelist_append(pagelist, method, size); 716 payload_len += size; 717 718 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 719 720 op->indata_len = payload_len; 721 } 722 EXPORT_SYMBOL(osd_req_op_cls_init); 723 724 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 725 u16 opcode, const char *name, const void *value, 726 size_t size, u8 cmp_op, u8 cmp_mode) 727 { 728 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 729 opcode, 0); 730 struct ceph_pagelist *pagelist; 731 size_t payload_len; 732 733 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 734 735 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 736 if (!pagelist) 737 return -ENOMEM; 738 739 ceph_pagelist_init(pagelist); 740 741 payload_len = strlen(name); 742 op->xattr.name_len = payload_len; 743 ceph_pagelist_append(pagelist, name, payload_len); 744 745 op->xattr.value_len = size; 746 ceph_pagelist_append(pagelist, value, size); 747 payload_len += size; 748 749 op->xattr.cmp_op = cmp_op; 750 op->xattr.cmp_mode = cmp_mode; 751 752 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 753 op->indata_len = payload_len; 754 return 0; 755 } 756 EXPORT_SYMBOL(osd_req_op_xattr_init); 757 758 /* 759 * @watch_opcode: CEPH_OSD_WATCH_OP_* 760 */ 761 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 762 u64 cookie, u8 watch_opcode) 763 { 764 struct ceph_osd_req_op *op; 765 766 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 767 op->watch.cookie = cookie; 768 op->watch.op = watch_opcode; 769 op->watch.gen = 0; 770 } 771 772 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 773 unsigned int which, 774 u64 expected_object_size, 775 u64 expected_write_size) 776 { 777 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 778 CEPH_OSD_OP_SETALLOCHINT, 779 0); 780 781 op->alloc_hint.expected_object_size = expected_object_size; 782 op->alloc_hint.expected_write_size = expected_write_size; 783 784 /* 785 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 786 * not worth a feature bit. Set FAILOK per-op flag to make 787 * sure older osds don't trip over an unsupported opcode. 788 */ 789 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 790 } 791 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 792 793 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 794 struct ceph_osd_data *osd_data) 795 { 796 u64 length = ceph_osd_data_length(osd_data); 797 798 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 799 BUG_ON(length > (u64) SIZE_MAX); 800 if (length) 801 ceph_msg_data_add_pages(msg, osd_data->pages, 802 length, osd_data->alignment); 803 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 804 BUG_ON(!length); 805 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 806 #ifdef CONFIG_BLOCK 807 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 808 ceph_msg_data_add_bio(msg, osd_data->bio, length); 809 #endif 810 } else { 811 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 812 } 813 } 814 815 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 816 const struct ceph_osd_req_op *src) 817 { 818 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 819 pr_err("unrecognized osd opcode %d\n", src->op); 820 821 return 0; 822 } 823 824 switch (src->op) { 825 case CEPH_OSD_OP_STAT: 826 break; 827 case CEPH_OSD_OP_READ: 828 case CEPH_OSD_OP_WRITE: 829 case CEPH_OSD_OP_WRITEFULL: 830 case CEPH_OSD_OP_ZERO: 831 case CEPH_OSD_OP_TRUNCATE: 832 dst->extent.offset = cpu_to_le64(src->extent.offset); 833 dst->extent.length = cpu_to_le64(src->extent.length); 834 dst->extent.truncate_size = 835 cpu_to_le64(src->extent.truncate_size); 836 dst->extent.truncate_seq = 837 cpu_to_le32(src->extent.truncate_seq); 838 break; 839 case CEPH_OSD_OP_CALL: 840 dst->cls.class_len = src->cls.class_len; 841 dst->cls.method_len = src->cls.method_len; 842 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 843 break; 844 case CEPH_OSD_OP_STARTSYNC: 845 break; 846 case CEPH_OSD_OP_WATCH: 847 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 848 dst->watch.ver = cpu_to_le64(0); 849 dst->watch.op = src->watch.op; 850 dst->watch.gen = cpu_to_le32(src->watch.gen); 851 break; 852 case CEPH_OSD_OP_NOTIFY_ACK: 853 break; 854 case CEPH_OSD_OP_NOTIFY: 855 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 856 break; 857 case CEPH_OSD_OP_SETALLOCHINT: 858 dst->alloc_hint.expected_object_size = 859 cpu_to_le64(src->alloc_hint.expected_object_size); 860 dst->alloc_hint.expected_write_size = 861 cpu_to_le64(src->alloc_hint.expected_write_size); 862 break; 863 case CEPH_OSD_OP_SETXATTR: 864 case CEPH_OSD_OP_CMPXATTR: 865 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 866 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 867 dst->xattr.cmp_op = src->xattr.cmp_op; 868 dst->xattr.cmp_mode = src->xattr.cmp_mode; 869 break; 870 case CEPH_OSD_OP_CREATE: 871 case CEPH_OSD_OP_DELETE: 872 break; 873 default: 874 pr_err("unsupported osd opcode %s\n", 875 ceph_osd_op_name(src->op)); 876 WARN_ON(1); 877 878 return 0; 879 } 880 881 dst->op = cpu_to_le16(src->op); 882 dst->flags = cpu_to_le32(src->flags); 883 dst->payload_len = cpu_to_le32(src->indata_len); 884 885 return src->indata_len; 886 } 887 888 /* 889 * build new request AND message, calculate layout, and adjust file 890 * extent as needed. 891 * 892 * if the file was recently truncated, we include information about its 893 * old and new size so that the object can be updated appropriately. (we 894 * avoid synchronously deleting truncated objects because it's slow.) 895 * 896 * if @do_sync, include a 'startsync' command so that the osd will flush 897 * data quickly. 898 */ 899 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 900 struct ceph_file_layout *layout, 901 struct ceph_vino vino, 902 u64 off, u64 *plen, 903 unsigned int which, int num_ops, 904 int opcode, int flags, 905 struct ceph_snap_context *snapc, 906 u32 truncate_seq, 907 u64 truncate_size, 908 bool use_mempool) 909 { 910 struct ceph_osd_request *req; 911 u64 objnum = 0; 912 u64 objoff = 0; 913 u64 objlen = 0; 914 int r; 915 916 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 917 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 918 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 919 920 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 921 GFP_NOFS); 922 if (!req) { 923 r = -ENOMEM; 924 goto fail; 925 } 926 927 /* calculate max write size */ 928 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 929 if (r) 930 goto fail; 931 932 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 933 osd_req_op_init(req, which, opcode, 0); 934 } else { 935 u32 object_size = le32_to_cpu(layout->fl_object_size); 936 u32 object_base = off - objoff; 937 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 938 if (truncate_size <= object_base) { 939 truncate_size = 0; 940 } else { 941 truncate_size -= object_base; 942 if (truncate_size > object_size) 943 truncate_size = object_size; 944 } 945 } 946 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 947 truncate_size, truncate_seq); 948 } 949 950 req->r_flags = flags; 951 req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout); 952 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 953 954 req->r_snapid = vino.snap; 955 if (flags & CEPH_OSD_FLAG_WRITE) 956 req->r_data_offset = off; 957 958 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 959 if (r) 960 goto fail; 961 962 return req; 963 964 fail: 965 ceph_osdc_put_request(req); 966 return ERR_PTR(r); 967 } 968 EXPORT_SYMBOL(ceph_osdc_new_request); 969 970 /* 971 * We keep osd requests in an rbtree, sorted by ->r_tid. 972 */ 973 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 974 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 975 976 static bool osd_homeless(struct ceph_osd *osd) 977 { 978 return osd->o_osd == CEPH_HOMELESS_OSD; 979 } 980 981 static bool osd_registered(struct ceph_osd *osd) 982 { 983 verify_osdc_locked(osd->o_osdc); 984 985 return !RB_EMPTY_NODE(&osd->o_node); 986 } 987 988 /* 989 * Assumes @osd is zero-initialized. 990 */ 991 static void osd_init(struct ceph_osd *osd) 992 { 993 atomic_set(&osd->o_ref, 1); 994 RB_CLEAR_NODE(&osd->o_node); 995 osd->o_requests = RB_ROOT; 996 osd->o_linger_requests = RB_ROOT; 997 INIT_LIST_HEAD(&osd->o_osd_lru); 998 INIT_LIST_HEAD(&osd->o_keepalive_item); 999 osd->o_incarnation = 1; 1000 mutex_init(&osd->lock); 1001 } 1002 1003 static void osd_cleanup(struct ceph_osd *osd) 1004 { 1005 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1006 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1007 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1008 WARN_ON(!list_empty(&osd->o_osd_lru)); 1009 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1010 1011 if (osd->o_auth.authorizer) { 1012 WARN_ON(osd_homeless(osd)); 1013 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1014 } 1015 } 1016 1017 /* 1018 * Track open sessions with osds. 1019 */ 1020 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1021 { 1022 struct ceph_osd *osd; 1023 1024 WARN_ON(onum == CEPH_HOMELESS_OSD); 1025 1026 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1027 osd_init(osd); 1028 osd->o_osdc = osdc; 1029 osd->o_osd = onum; 1030 1031 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1032 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 osd_cleanup(osd); 1054 kfree(osd); 1055 } 1056 } 1057 1058 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1059 1060 static void __move_osd_to_lru(struct ceph_osd *osd) 1061 { 1062 struct ceph_osd_client *osdc = osd->o_osdc; 1063 1064 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1065 BUG_ON(!list_empty(&osd->o_osd_lru)); 1066 1067 spin_lock(&osdc->osd_lru_lock); 1068 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1069 spin_unlock(&osdc->osd_lru_lock); 1070 1071 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1072 } 1073 1074 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1075 { 1076 if (RB_EMPTY_ROOT(&osd->o_requests) && 1077 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1078 __move_osd_to_lru(osd); 1079 } 1080 1081 static void __remove_osd_from_lru(struct ceph_osd *osd) 1082 { 1083 struct ceph_osd_client *osdc = osd->o_osdc; 1084 1085 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1086 1087 spin_lock(&osdc->osd_lru_lock); 1088 if (!list_empty(&osd->o_osd_lru)) 1089 list_del_init(&osd->o_osd_lru); 1090 spin_unlock(&osdc->osd_lru_lock); 1091 } 1092 1093 /* 1094 * Close the connection and assign any leftover requests to the 1095 * homeless session. 1096 */ 1097 static void close_osd(struct ceph_osd *osd) 1098 { 1099 struct ceph_osd_client *osdc = osd->o_osdc; 1100 struct rb_node *n; 1101 1102 verify_osdc_wrlocked(osdc); 1103 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1104 1105 ceph_con_close(&osd->o_con); 1106 1107 for (n = rb_first(&osd->o_requests); n; ) { 1108 struct ceph_osd_request *req = 1109 rb_entry(n, struct ceph_osd_request, r_node); 1110 1111 n = rb_next(n); /* unlink_request() */ 1112 1113 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1114 unlink_request(osd, req); 1115 link_request(&osdc->homeless_osd, req); 1116 } 1117 for (n = rb_first(&osd->o_linger_requests); n; ) { 1118 struct ceph_osd_linger_request *lreq = 1119 rb_entry(n, struct ceph_osd_linger_request, node); 1120 1121 n = rb_next(n); /* unlink_linger() */ 1122 1123 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1124 lreq->linger_id); 1125 unlink_linger(osd, lreq); 1126 link_linger(&osdc->homeless_osd, lreq); 1127 } 1128 1129 __remove_osd_from_lru(osd); 1130 erase_osd(&osdc->osds, osd); 1131 put_osd(osd); 1132 } 1133 1134 /* 1135 * reset osd connect 1136 */ 1137 static int reopen_osd(struct ceph_osd *osd) 1138 { 1139 struct ceph_entity_addr *peer_addr; 1140 1141 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1142 1143 if (RB_EMPTY_ROOT(&osd->o_requests) && 1144 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1145 close_osd(osd); 1146 return -ENODEV; 1147 } 1148 1149 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1150 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1151 !ceph_con_opened(&osd->o_con)) { 1152 struct rb_node *n; 1153 1154 dout("osd addr hasn't changed and connection never opened, " 1155 "letting msgr retry\n"); 1156 /* touch each r_stamp for handle_timeout()'s benfit */ 1157 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1158 struct ceph_osd_request *req = 1159 rb_entry(n, struct ceph_osd_request, r_node); 1160 req->r_stamp = jiffies; 1161 } 1162 1163 return -EAGAIN; 1164 } 1165 1166 ceph_con_close(&osd->o_con); 1167 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1168 osd->o_incarnation++; 1169 1170 return 0; 1171 } 1172 1173 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1174 bool wrlocked) 1175 { 1176 struct ceph_osd *osd; 1177 1178 if (wrlocked) 1179 verify_osdc_wrlocked(osdc); 1180 else 1181 verify_osdc_locked(osdc); 1182 1183 if (o != CEPH_HOMELESS_OSD) 1184 osd = lookup_osd(&osdc->osds, o); 1185 else 1186 osd = &osdc->homeless_osd; 1187 if (!osd) { 1188 if (!wrlocked) 1189 return ERR_PTR(-EAGAIN); 1190 1191 osd = create_osd(osdc, o); 1192 insert_osd(&osdc->osds, osd); 1193 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1194 &osdc->osdmap->osd_addr[osd->o_osd]); 1195 } 1196 1197 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1198 return osd; 1199 } 1200 1201 /* 1202 * Create request <-> OSD session relation. 1203 * 1204 * @req has to be assigned a tid, @osd may be homeless. 1205 */ 1206 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1207 { 1208 verify_osd_locked(osd); 1209 WARN_ON(!req->r_tid || req->r_osd); 1210 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1211 req, req->r_tid); 1212 1213 if (!osd_homeless(osd)) 1214 __remove_osd_from_lru(osd); 1215 else 1216 atomic_inc(&osd->o_osdc->num_homeless); 1217 1218 get_osd(osd); 1219 insert_request(&osd->o_requests, req); 1220 req->r_osd = osd; 1221 } 1222 1223 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1224 { 1225 verify_osd_locked(osd); 1226 WARN_ON(req->r_osd != osd); 1227 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1228 req, req->r_tid); 1229 1230 req->r_osd = NULL; 1231 erase_request(&osd->o_requests, req); 1232 put_osd(osd); 1233 1234 if (!osd_homeless(osd)) 1235 maybe_move_osd_to_lru(osd); 1236 else 1237 atomic_dec(&osd->o_osdc->num_homeless); 1238 } 1239 1240 static bool __pool_full(struct ceph_pg_pool_info *pi) 1241 { 1242 return pi->flags & CEPH_POOL_FLAG_FULL; 1243 } 1244 1245 static bool have_pool_full(struct ceph_osd_client *osdc) 1246 { 1247 struct rb_node *n; 1248 1249 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1250 struct ceph_pg_pool_info *pi = 1251 rb_entry(n, struct ceph_pg_pool_info, node); 1252 1253 if (__pool_full(pi)) 1254 return true; 1255 } 1256 1257 return false; 1258 } 1259 1260 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1261 { 1262 struct ceph_pg_pool_info *pi; 1263 1264 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1265 if (!pi) 1266 return false; 1267 1268 return __pool_full(pi); 1269 } 1270 1271 /* 1272 * Returns whether a request should be blocked from being sent 1273 * based on the current osdmap and osd_client settings. 1274 */ 1275 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1276 const struct ceph_osd_request_target *t, 1277 struct ceph_pg_pool_info *pi) 1278 { 1279 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1280 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1281 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1282 __pool_full(pi); 1283 1284 WARN_ON(pi->id != t->base_oloc.pool); 1285 return (t->flags & CEPH_OSD_FLAG_READ && pauserd) || 1286 (t->flags & CEPH_OSD_FLAG_WRITE && pausewr); 1287 } 1288 1289 enum calc_target_result { 1290 CALC_TARGET_NO_ACTION = 0, 1291 CALC_TARGET_NEED_RESEND, 1292 CALC_TARGET_POOL_DNE, 1293 }; 1294 1295 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1296 struct ceph_osd_request_target *t, 1297 u32 *last_force_resend, 1298 bool any_change) 1299 { 1300 struct ceph_pg_pool_info *pi; 1301 struct ceph_pg pgid, last_pgid; 1302 struct ceph_osds up, acting; 1303 bool force_resend = false; 1304 bool need_check_tiering = false; 1305 bool need_resend = false; 1306 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1307 enum calc_target_result ct_res; 1308 int ret; 1309 1310 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1311 if (!pi) { 1312 t->osd = CEPH_HOMELESS_OSD; 1313 ct_res = CALC_TARGET_POOL_DNE; 1314 goto out; 1315 } 1316 1317 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1318 if (last_force_resend && 1319 *last_force_resend < pi->last_force_request_resend) { 1320 *last_force_resend = pi->last_force_request_resend; 1321 force_resend = true; 1322 } else if (!last_force_resend) { 1323 force_resend = true; 1324 } 1325 } 1326 if (ceph_oid_empty(&t->target_oid) || force_resend) { 1327 ceph_oid_copy(&t->target_oid, &t->base_oid); 1328 need_check_tiering = true; 1329 } 1330 if (ceph_oloc_empty(&t->target_oloc) || force_resend) { 1331 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1332 need_check_tiering = true; 1333 } 1334 1335 if (need_check_tiering && 1336 (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1337 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) 1338 t->target_oloc.pool = pi->read_tier; 1339 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) 1340 t->target_oloc.pool = pi->write_tier; 1341 } 1342 1343 ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid, 1344 &t->target_oloc, &pgid); 1345 if (ret) { 1346 WARN_ON(ret != -ENOENT); 1347 t->osd = CEPH_HOMELESS_OSD; 1348 ct_res = CALC_TARGET_POOL_DNE; 1349 goto out; 1350 } 1351 last_pgid.pool = pgid.pool; 1352 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1353 1354 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting); 1355 if (any_change && 1356 ceph_is_new_interval(&t->acting, 1357 &acting, 1358 &t->up, 1359 &up, 1360 t->size, 1361 pi->size, 1362 t->min_size, 1363 pi->min_size, 1364 t->pg_num, 1365 pi->pg_num, 1366 t->sort_bitwise, 1367 sort_bitwise, 1368 &last_pgid)) 1369 force_resend = true; 1370 1371 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1372 t->paused = false; 1373 need_resend = true; 1374 } 1375 1376 if (ceph_pg_compare(&t->pgid, &pgid) || 1377 ceph_osds_changed(&t->acting, &acting, any_change) || 1378 force_resend) { 1379 t->pgid = pgid; /* struct */ 1380 ceph_osds_copy(&t->acting, &acting); 1381 ceph_osds_copy(&t->up, &up); 1382 t->size = pi->size; 1383 t->min_size = pi->min_size; 1384 t->pg_num = pi->pg_num; 1385 t->pg_num_mask = pi->pg_num_mask; 1386 t->sort_bitwise = sort_bitwise; 1387 1388 t->osd = acting.primary; 1389 need_resend = true; 1390 } 1391 1392 ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION; 1393 out: 1394 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd); 1395 return ct_res; 1396 } 1397 1398 static void setup_request_data(struct ceph_osd_request *req, 1399 struct ceph_msg *msg) 1400 { 1401 u32 data_len = 0; 1402 int i; 1403 1404 if (!list_empty(&msg->data)) 1405 return; 1406 1407 WARN_ON(msg->data_length); 1408 for (i = 0; i < req->r_num_ops; i++) { 1409 struct ceph_osd_req_op *op = &req->r_ops[i]; 1410 1411 switch (op->op) { 1412 /* request */ 1413 case CEPH_OSD_OP_WRITE: 1414 case CEPH_OSD_OP_WRITEFULL: 1415 WARN_ON(op->indata_len != op->extent.length); 1416 ceph_osdc_msg_data_add(msg, &op->extent.osd_data); 1417 break; 1418 case CEPH_OSD_OP_SETXATTR: 1419 case CEPH_OSD_OP_CMPXATTR: 1420 WARN_ON(op->indata_len != op->xattr.name_len + 1421 op->xattr.value_len); 1422 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data); 1423 break; 1424 case CEPH_OSD_OP_NOTIFY_ACK: 1425 ceph_osdc_msg_data_add(msg, 1426 &op->notify_ack.request_data); 1427 break; 1428 1429 /* reply */ 1430 case CEPH_OSD_OP_STAT: 1431 ceph_osdc_msg_data_add(req->r_reply, 1432 &op->raw_data_in); 1433 break; 1434 case CEPH_OSD_OP_READ: 1435 ceph_osdc_msg_data_add(req->r_reply, 1436 &op->extent.osd_data); 1437 break; 1438 1439 /* both */ 1440 case CEPH_OSD_OP_CALL: 1441 WARN_ON(op->indata_len != op->cls.class_len + 1442 op->cls.method_len + 1443 op->cls.indata_len); 1444 ceph_osdc_msg_data_add(msg, &op->cls.request_info); 1445 /* optional, can be NONE */ 1446 ceph_osdc_msg_data_add(msg, &op->cls.request_data); 1447 /* optional, can be NONE */ 1448 ceph_osdc_msg_data_add(req->r_reply, 1449 &op->cls.response_data); 1450 break; 1451 case CEPH_OSD_OP_NOTIFY: 1452 ceph_osdc_msg_data_add(msg, 1453 &op->notify.request_data); 1454 ceph_osdc_msg_data_add(req->r_reply, 1455 &op->notify.response_data); 1456 break; 1457 } 1458 1459 data_len += op->indata_len; 1460 } 1461 1462 WARN_ON(data_len != msg->data_length); 1463 } 1464 1465 static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg) 1466 { 1467 void *p = msg->front.iov_base; 1468 void *const end = p + msg->front_alloc_len; 1469 u32 data_len = 0; 1470 int i; 1471 1472 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 1473 /* snapshots aren't writeable */ 1474 WARN_ON(req->r_snapid != CEPH_NOSNAP); 1475 } else { 1476 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 1477 req->r_data_offset || req->r_snapc); 1478 } 1479 1480 setup_request_data(req, msg); 1481 1482 ceph_encode_32(&p, 1); /* client_inc, always 1 */ 1483 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 1484 ceph_encode_32(&p, req->r_flags); 1485 ceph_encode_timespec(p, &req->r_mtime); 1486 p += sizeof(struct ceph_timespec); 1487 /* aka reassert_version */ 1488 memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version)); 1489 p += sizeof(req->r_replay_version); 1490 1491 /* oloc */ 1492 ceph_encode_8(&p, 4); 1493 ceph_encode_8(&p, 4); 1494 ceph_encode_32(&p, 8 + 4 + 4); 1495 ceph_encode_64(&p, req->r_t.target_oloc.pool); 1496 ceph_encode_32(&p, -1); /* preferred */ 1497 ceph_encode_32(&p, 0); /* key len */ 1498 1499 /* pgid */ 1500 ceph_encode_8(&p, 1); 1501 ceph_encode_64(&p, req->r_t.pgid.pool); 1502 ceph_encode_32(&p, req->r_t.pgid.seed); 1503 ceph_encode_32(&p, -1); /* preferred */ 1504 1505 /* oid */ 1506 ceph_encode_32(&p, req->r_t.target_oid.name_len); 1507 memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len); 1508 p += req->r_t.target_oid.name_len; 1509 1510 /* ops, can imply data */ 1511 ceph_encode_16(&p, req->r_num_ops); 1512 for (i = 0; i < req->r_num_ops; i++) { 1513 data_len += osd_req_encode_op(p, &req->r_ops[i]); 1514 p += sizeof(struct ceph_osd_op); 1515 } 1516 1517 ceph_encode_64(&p, req->r_snapid); /* snapid */ 1518 if (req->r_snapc) { 1519 ceph_encode_64(&p, req->r_snapc->seq); 1520 ceph_encode_32(&p, req->r_snapc->num_snaps); 1521 for (i = 0; i < req->r_snapc->num_snaps; i++) 1522 ceph_encode_64(&p, req->r_snapc->snaps[i]); 1523 } else { 1524 ceph_encode_64(&p, 0); /* snap_seq */ 1525 ceph_encode_32(&p, 0); /* snaps len */ 1526 } 1527 1528 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 1529 1530 BUG_ON(p > end); 1531 msg->front.iov_len = p - msg->front.iov_base; 1532 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 1533 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 1534 msg->hdr.data_len = cpu_to_le32(data_len); 1535 /* 1536 * The header "data_off" is a hint to the receiver allowing it 1537 * to align received data into its buffers such that there's no 1538 * need to re-copy it before writing it to disk (direct I/O). 1539 */ 1540 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 1541 1542 dout("%s req %p oid %s oid_len %d front %zu data %u\n", __func__, 1543 req, req->r_t.target_oid.name, req->r_t.target_oid.name_len, 1544 msg->front.iov_len, data_len); 1545 } 1546 1547 /* 1548 * @req has to be assigned a tid and registered. 1549 */ 1550 static void send_request(struct ceph_osd_request *req) 1551 { 1552 struct ceph_osd *osd = req->r_osd; 1553 1554 verify_osd_locked(osd); 1555 WARN_ON(osd->o_osd != req->r_t.osd); 1556 1557 /* 1558 * We may have a previously queued request message hanging 1559 * around. Cancel it to avoid corrupting the msgr. 1560 */ 1561 if (req->r_sent) 1562 ceph_msg_revoke(req->r_request); 1563 1564 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 1565 if (req->r_attempts) 1566 req->r_flags |= CEPH_OSD_FLAG_RETRY; 1567 else 1568 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 1569 1570 encode_request(req, req->r_request); 1571 1572 dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n", 1573 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 1574 req->r_t.osd, req->r_flags, req->r_attempts); 1575 1576 req->r_t.paused = false; 1577 req->r_stamp = jiffies; 1578 req->r_attempts++; 1579 1580 req->r_sent = osd->o_incarnation; 1581 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 1582 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 1583 } 1584 1585 static void maybe_request_map(struct ceph_osd_client *osdc) 1586 { 1587 bool continuous = false; 1588 1589 verify_osdc_locked(osdc); 1590 WARN_ON(!osdc->osdmap->epoch); 1591 1592 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1593 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 1594 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 1595 dout("%s osdc %p continuous\n", __func__, osdc); 1596 continuous = true; 1597 } else { 1598 dout("%s osdc %p onetime\n", __func__, osdc); 1599 } 1600 1601 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 1602 osdc->osdmap->epoch + 1, continuous)) 1603 ceph_monc_renew_subs(&osdc->client->monc); 1604 } 1605 1606 static void send_map_check(struct ceph_osd_request *req); 1607 1608 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 1609 { 1610 struct ceph_osd_client *osdc = req->r_osdc; 1611 struct ceph_osd *osd; 1612 enum calc_target_result ct_res; 1613 bool need_send = false; 1614 bool promoted = false; 1615 1616 WARN_ON(req->r_tid || req->r_got_reply); 1617 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 1618 1619 again: 1620 ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, false); 1621 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 1622 goto promote; 1623 1624 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 1625 if (IS_ERR(osd)) { 1626 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 1627 goto promote; 1628 } 1629 1630 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1631 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 1632 dout("req %p pausewr\n", req); 1633 req->r_t.paused = true; 1634 maybe_request_map(osdc); 1635 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1636 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 1637 dout("req %p pauserd\n", req); 1638 req->r_t.paused = true; 1639 maybe_request_map(osdc); 1640 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1641 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 1642 CEPH_OSD_FLAG_FULL_FORCE)) && 1643 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1644 pool_full(osdc, req->r_t.base_oloc.pool))) { 1645 dout("req %p full/pool_full\n", req); 1646 pr_warn_ratelimited("FULL or reached pool quota\n"); 1647 req->r_t.paused = true; 1648 maybe_request_map(osdc); 1649 } else if (!osd_homeless(osd)) { 1650 need_send = true; 1651 } else { 1652 maybe_request_map(osdc); 1653 } 1654 1655 mutex_lock(&osd->lock); 1656 /* 1657 * Assign the tid atomically with send_request() to protect 1658 * multiple writes to the same object from racing with each 1659 * other, resulting in out of order ops on the OSDs. 1660 */ 1661 req->r_tid = atomic64_inc_return(&osdc->last_tid); 1662 link_request(osd, req); 1663 if (need_send) 1664 send_request(req); 1665 mutex_unlock(&osd->lock); 1666 1667 if (ct_res == CALC_TARGET_POOL_DNE) 1668 send_map_check(req); 1669 1670 if (promoted) 1671 downgrade_write(&osdc->lock); 1672 return; 1673 1674 promote: 1675 up_read(&osdc->lock); 1676 down_write(&osdc->lock); 1677 wrlocked = true; 1678 promoted = true; 1679 goto again; 1680 } 1681 1682 static void account_request(struct ceph_osd_request *req) 1683 { 1684 unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK; 1685 1686 if (req->r_flags & CEPH_OSD_FLAG_READ) { 1687 WARN_ON(req->r_flags & mask); 1688 req->r_flags |= CEPH_OSD_FLAG_ACK; 1689 } else if (req->r_flags & CEPH_OSD_FLAG_WRITE) 1690 WARN_ON(!(req->r_flags & mask)); 1691 else 1692 WARN_ON(1); 1693 1694 WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask); 1695 atomic_inc(&req->r_osdc->num_requests); 1696 } 1697 1698 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 1699 { 1700 ceph_osdc_get_request(req); 1701 account_request(req); 1702 __submit_request(req, wrlocked); 1703 } 1704 1705 static void __finish_request(struct ceph_osd_request *req) 1706 { 1707 struct ceph_osd_client *osdc = req->r_osdc; 1708 struct ceph_osd *osd = req->r_osd; 1709 1710 verify_osd_locked(osd); 1711 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1712 1713 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 1714 unlink_request(osd, req); 1715 atomic_dec(&osdc->num_requests); 1716 1717 /* 1718 * If an OSD has failed or returned and a request has been sent 1719 * twice, it's possible to get a reply and end up here while the 1720 * request message is queued for delivery. We will ignore the 1721 * reply, so not a big deal, but better to try and catch it. 1722 */ 1723 ceph_msg_revoke(req->r_request); 1724 ceph_msg_revoke_incoming(req->r_reply); 1725 } 1726 1727 static void finish_request(struct ceph_osd_request *req) 1728 { 1729 __finish_request(req); 1730 ceph_osdc_put_request(req); 1731 } 1732 1733 static void __complete_request(struct ceph_osd_request *req) 1734 { 1735 if (req->r_callback) 1736 req->r_callback(req); 1737 else 1738 complete_all(&req->r_completion); 1739 } 1740 1741 /* 1742 * Note that this is open-coded in handle_reply(), which has to deal 1743 * with ack vs commit, dup acks, etc. 1744 */ 1745 static void complete_request(struct ceph_osd_request *req, int err) 1746 { 1747 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 1748 1749 req->r_result = err; 1750 __finish_request(req); 1751 __complete_request(req); 1752 complete_all(&req->r_safe_completion); 1753 ceph_osdc_put_request(req); 1754 } 1755 1756 static void cancel_map_check(struct ceph_osd_request *req) 1757 { 1758 struct ceph_osd_client *osdc = req->r_osdc; 1759 struct ceph_osd_request *lookup_req; 1760 1761 verify_osdc_wrlocked(osdc); 1762 1763 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1764 if (!lookup_req) 1765 return; 1766 1767 WARN_ON(lookup_req != req); 1768 erase_request_mc(&osdc->map_checks, req); 1769 ceph_osdc_put_request(req); 1770 } 1771 1772 static void cancel_request(struct ceph_osd_request *req) 1773 { 1774 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1775 1776 cancel_map_check(req); 1777 finish_request(req); 1778 } 1779 1780 static void check_pool_dne(struct ceph_osd_request *req) 1781 { 1782 struct ceph_osd_client *osdc = req->r_osdc; 1783 struct ceph_osdmap *map = osdc->osdmap; 1784 1785 verify_osdc_wrlocked(osdc); 1786 WARN_ON(!map->epoch); 1787 1788 if (req->r_attempts) { 1789 /* 1790 * We sent a request earlier, which means that 1791 * previously the pool existed, and now it does not 1792 * (i.e., it was deleted). 1793 */ 1794 req->r_map_dne_bound = map->epoch; 1795 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 1796 req->r_tid); 1797 } else { 1798 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 1799 req, req->r_tid, req->r_map_dne_bound, map->epoch); 1800 } 1801 1802 if (req->r_map_dne_bound) { 1803 if (map->epoch >= req->r_map_dne_bound) { 1804 /* we had a new enough map */ 1805 pr_info_ratelimited("tid %llu pool does not exist\n", 1806 req->r_tid); 1807 complete_request(req, -ENOENT); 1808 } 1809 } else { 1810 send_map_check(req); 1811 } 1812 } 1813 1814 static void map_check_cb(struct ceph_mon_generic_request *greq) 1815 { 1816 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 1817 struct ceph_osd_request *req; 1818 u64 tid = greq->private_data; 1819 1820 WARN_ON(greq->result || !greq->u.newest); 1821 1822 down_write(&osdc->lock); 1823 req = lookup_request_mc(&osdc->map_checks, tid); 1824 if (!req) { 1825 dout("%s tid %llu dne\n", __func__, tid); 1826 goto out_unlock; 1827 } 1828 1829 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 1830 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 1831 if (!req->r_map_dne_bound) 1832 req->r_map_dne_bound = greq->u.newest; 1833 erase_request_mc(&osdc->map_checks, req); 1834 check_pool_dne(req); 1835 1836 ceph_osdc_put_request(req); 1837 out_unlock: 1838 up_write(&osdc->lock); 1839 } 1840 1841 static void send_map_check(struct ceph_osd_request *req) 1842 { 1843 struct ceph_osd_client *osdc = req->r_osdc; 1844 struct ceph_osd_request *lookup_req; 1845 int ret; 1846 1847 verify_osdc_wrlocked(osdc); 1848 1849 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1850 if (lookup_req) { 1851 WARN_ON(lookup_req != req); 1852 return; 1853 } 1854 1855 ceph_osdc_get_request(req); 1856 insert_request_mc(&osdc->map_checks, req); 1857 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 1858 map_check_cb, req->r_tid); 1859 WARN_ON(ret); 1860 } 1861 1862 /* 1863 * lingering requests, watch/notify v2 infrastructure 1864 */ 1865 static void linger_release(struct kref *kref) 1866 { 1867 struct ceph_osd_linger_request *lreq = 1868 container_of(kref, struct ceph_osd_linger_request, kref); 1869 1870 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 1871 lreq->reg_req, lreq->ping_req); 1872 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 1873 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 1874 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 1875 WARN_ON(!list_empty(&lreq->scan_item)); 1876 WARN_ON(!list_empty(&lreq->pending_lworks)); 1877 WARN_ON(lreq->osd); 1878 1879 if (lreq->reg_req) 1880 ceph_osdc_put_request(lreq->reg_req); 1881 if (lreq->ping_req) 1882 ceph_osdc_put_request(lreq->ping_req); 1883 target_destroy(&lreq->t); 1884 kfree(lreq); 1885 } 1886 1887 static void linger_put(struct ceph_osd_linger_request *lreq) 1888 { 1889 if (lreq) 1890 kref_put(&lreq->kref, linger_release); 1891 } 1892 1893 static struct ceph_osd_linger_request * 1894 linger_get(struct ceph_osd_linger_request *lreq) 1895 { 1896 kref_get(&lreq->kref); 1897 return lreq; 1898 } 1899 1900 static struct ceph_osd_linger_request * 1901 linger_alloc(struct ceph_osd_client *osdc) 1902 { 1903 struct ceph_osd_linger_request *lreq; 1904 1905 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 1906 if (!lreq) 1907 return NULL; 1908 1909 kref_init(&lreq->kref); 1910 mutex_init(&lreq->lock); 1911 RB_CLEAR_NODE(&lreq->node); 1912 RB_CLEAR_NODE(&lreq->osdc_node); 1913 RB_CLEAR_NODE(&lreq->mc_node); 1914 INIT_LIST_HEAD(&lreq->scan_item); 1915 INIT_LIST_HEAD(&lreq->pending_lworks); 1916 init_completion(&lreq->reg_commit_wait); 1917 init_completion(&lreq->notify_finish_wait); 1918 1919 lreq->osdc = osdc; 1920 target_init(&lreq->t); 1921 1922 dout("%s lreq %p\n", __func__, lreq); 1923 return lreq; 1924 } 1925 1926 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 1927 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 1928 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 1929 1930 /* 1931 * Create linger request <-> OSD session relation. 1932 * 1933 * @lreq has to be registered, @osd may be homeless. 1934 */ 1935 static void link_linger(struct ceph_osd *osd, 1936 struct ceph_osd_linger_request *lreq) 1937 { 1938 verify_osd_locked(osd); 1939 WARN_ON(!lreq->linger_id || lreq->osd); 1940 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1941 osd->o_osd, lreq, lreq->linger_id); 1942 1943 if (!osd_homeless(osd)) 1944 __remove_osd_from_lru(osd); 1945 else 1946 atomic_inc(&osd->o_osdc->num_homeless); 1947 1948 get_osd(osd); 1949 insert_linger(&osd->o_linger_requests, lreq); 1950 lreq->osd = osd; 1951 } 1952 1953 static void unlink_linger(struct ceph_osd *osd, 1954 struct ceph_osd_linger_request *lreq) 1955 { 1956 verify_osd_locked(osd); 1957 WARN_ON(lreq->osd != osd); 1958 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1959 osd->o_osd, lreq, lreq->linger_id); 1960 1961 lreq->osd = NULL; 1962 erase_linger(&osd->o_linger_requests, lreq); 1963 put_osd(osd); 1964 1965 if (!osd_homeless(osd)) 1966 maybe_move_osd_to_lru(osd); 1967 else 1968 atomic_dec(&osd->o_osdc->num_homeless); 1969 } 1970 1971 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 1972 { 1973 verify_osdc_locked(lreq->osdc); 1974 1975 return !RB_EMPTY_NODE(&lreq->osdc_node); 1976 } 1977 1978 static bool linger_registered(struct ceph_osd_linger_request *lreq) 1979 { 1980 struct ceph_osd_client *osdc = lreq->osdc; 1981 bool registered; 1982 1983 down_read(&osdc->lock); 1984 registered = __linger_registered(lreq); 1985 up_read(&osdc->lock); 1986 1987 return registered; 1988 } 1989 1990 static void linger_register(struct ceph_osd_linger_request *lreq) 1991 { 1992 struct ceph_osd_client *osdc = lreq->osdc; 1993 1994 verify_osdc_wrlocked(osdc); 1995 WARN_ON(lreq->linger_id); 1996 1997 linger_get(lreq); 1998 lreq->linger_id = ++osdc->last_linger_id; 1999 insert_linger_osdc(&osdc->linger_requests, lreq); 2000 } 2001 2002 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2003 { 2004 struct ceph_osd_client *osdc = lreq->osdc; 2005 2006 verify_osdc_wrlocked(osdc); 2007 2008 erase_linger_osdc(&osdc->linger_requests, lreq); 2009 linger_put(lreq); 2010 } 2011 2012 static void cancel_linger_request(struct ceph_osd_request *req) 2013 { 2014 struct ceph_osd_linger_request *lreq = req->r_priv; 2015 2016 WARN_ON(!req->r_linger); 2017 cancel_request(req); 2018 linger_put(lreq); 2019 } 2020 2021 struct linger_work { 2022 struct work_struct work; 2023 struct ceph_osd_linger_request *lreq; 2024 struct list_head pending_item; 2025 unsigned long queued_stamp; 2026 2027 union { 2028 struct { 2029 u64 notify_id; 2030 u64 notifier_id; 2031 void *payload; /* points into @msg front */ 2032 size_t payload_len; 2033 2034 struct ceph_msg *msg; /* for ceph_msg_put() */ 2035 } notify; 2036 struct { 2037 int err; 2038 } error; 2039 }; 2040 }; 2041 2042 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2043 work_func_t workfn) 2044 { 2045 struct linger_work *lwork; 2046 2047 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2048 if (!lwork) 2049 return NULL; 2050 2051 INIT_WORK(&lwork->work, workfn); 2052 INIT_LIST_HEAD(&lwork->pending_item); 2053 lwork->lreq = linger_get(lreq); 2054 2055 return lwork; 2056 } 2057 2058 static void lwork_free(struct linger_work *lwork) 2059 { 2060 struct ceph_osd_linger_request *lreq = lwork->lreq; 2061 2062 mutex_lock(&lreq->lock); 2063 list_del(&lwork->pending_item); 2064 mutex_unlock(&lreq->lock); 2065 2066 linger_put(lreq); 2067 kfree(lwork); 2068 } 2069 2070 static void lwork_queue(struct linger_work *lwork) 2071 { 2072 struct ceph_osd_linger_request *lreq = lwork->lreq; 2073 struct ceph_osd_client *osdc = lreq->osdc; 2074 2075 verify_lreq_locked(lreq); 2076 WARN_ON(!list_empty(&lwork->pending_item)); 2077 2078 lwork->queued_stamp = jiffies; 2079 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2080 queue_work(osdc->notify_wq, &lwork->work); 2081 } 2082 2083 static void do_watch_notify(struct work_struct *w) 2084 { 2085 struct linger_work *lwork = container_of(w, struct linger_work, work); 2086 struct ceph_osd_linger_request *lreq = lwork->lreq; 2087 2088 if (!linger_registered(lreq)) { 2089 dout("%s lreq %p not registered\n", __func__, lreq); 2090 goto out; 2091 } 2092 2093 WARN_ON(!lreq->is_watch); 2094 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2095 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2096 lwork->notify.payload_len); 2097 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2098 lwork->notify.notifier_id, lwork->notify.payload, 2099 lwork->notify.payload_len); 2100 2101 out: 2102 ceph_msg_put(lwork->notify.msg); 2103 lwork_free(lwork); 2104 } 2105 2106 static void do_watch_error(struct work_struct *w) 2107 { 2108 struct linger_work *lwork = container_of(w, struct linger_work, work); 2109 struct ceph_osd_linger_request *lreq = lwork->lreq; 2110 2111 if (!linger_registered(lreq)) { 2112 dout("%s lreq %p not registered\n", __func__, lreq); 2113 goto out; 2114 } 2115 2116 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2117 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2118 2119 out: 2120 lwork_free(lwork); 2121 } 2122 2123 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2124 { 2125 struct linger_work *lwork; 2126 2127 lwork = lwork_alloc(lreq, do_watch_error); 2128 if (!lwork) { 2129 pr_err("failed to allocate error-lwork\n"); 2130 return; 2131 } 2132 2133 lwork->error.err = lreq->last_error; 2134 lwork_queue(lwork); 2135 } 2136 2137 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2138 int result) 2139 { 2140 if (!completion_done(&lreq->reg_commit_wait)) { 2141 lreq->reg_commit_error = (result <= 0 ? result : 0); 2142 complete_all(&lreq->reg_commit_wait); 2143 } 2144 } 2145 2146 static void linger_commit_cb(struct ceph_osd_request *req) 2147 { 2148 struct ceph_osd_linger_request *lreq = req->r_priv; 2149 2150 mutex_lock(&lreq->lock); 2151 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2152 lreq->linger_id, req->r_result); 2153 WARN_ON(!__linger_registered(lreq)); 2154 linger_reg_commit_complete(lreq, req->r_result); 2155 lreq->committed = true; 2156 2157 if (!lreq->is_watch) { 2158 struct ceph_osd_data *osd_data = 2159 osd_req_op_data(req, 0, notify, response_data); 2160 void *p = page_address(osd_data->pages[0]); 2161 2162 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2163 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2164 2165 /* make note of the notify_id */ 2166 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2167 lreq->notify_id = ceph_decode_64(&p); 2168 dout("lreq %p notify_id %llu\n", lreq, 2169 lreq->notify_id); 2170 } else { 2171 dout("lreq %p no notify_id\n", lreq); 2172 } 2173 } 2174 2175 mutex_unlock(&lreq->lock); 2176 linger_put(lreq); 2177 } 2178 2179 static int normalize_watch_error(int err) 2180 { 2181 /* 2182 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2183 * notification and a failure to reconnect because we raced with 2184 * the delete appear the same to the user. 2185 */ 2186 if (err == -ENOENT) 2187 err = -ENOTCONN; 2188 2189 return err; 2190 } 2191 2192 static void linger_reconnect_cb(struct ceph_osd_request *req) 2193 { 2194 struct ceph_osd_linger_request *lreq = req->r_priv; 2195 2196 mutex_lock(&lreq->lock); 2197 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2198 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2199 if (req->r_result < 0) { 2200 if (!lreq->last_error) { 2201 lreq->last_error = normalize_watch_error(req->r_result); 2202 queue_watch_error(lreq); 2203 } 2204 } 2205 2206 mutex_unlock(&lreq->lock); 2207 linger_put(lreq); 2208 } 2209 2210 static void send_linger(struct ceph_osd_linger_request *lreq) 2211 { 2212 struct ceph_osd_request *req = lreq->reg_req; 2213 struct ceph_osd_req_op *op = &req->r_ops[0]; 2214 2215 verify_osdc_wrlocked(req->r_osdc); 2216 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2217 2218 if (req->r_osd) 2219 cancel_linger_request(req); 2220 2221 request_reinit(req); 2222 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 2223 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 2224 req->r_flags = lreq->t.flags; 2225 req->r_mtime = lreq->mtime; 2226 2227 mutex_lock(&lreq->lock); 2228 if (lreq->is_watch && lreq->committed) { 2229 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2230 op->watch.cookie != lreq->linger_id); 2231 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 2232 op->watch.gen = ++lreq->register_gen; 2233 dout("lreq %p reconnect register_gen %u\n", lreq, 2234 op->watch.gen); 2235 req->r_callback = linger_reconnect_cb; 2236 } else { 2237 if (!lreq->is_watch) 2238 lreq->notify_id = 0; 2239 else 2240 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 2241 dout("lreq %p register\n", lreq); 2242 req->r_callback = linger_commit_cb; 2243 } 2244 mutex_unlock(&lreq->lock); 2245 2246 req->r_priv = linger_get(lreq); 2247 req->r_linger = true; 2248 2249 submit_request(req, true); 2250 } 2251 2252 static void linger_ping_cb(struct ceph_osd_request *req) 2253 { 2254 struct ceph_osd_linger_request *lreq = req->r_priv; 2255 2256 mutex_lock(&lreq->lock); 2257 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 2258 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 2259 lreq->last_error); 2260 if (lreq->register_gen == req->r_ops[0].watch.gen) { 2261 if (!req->r_result) { 2262 lreq->watch_valid_thru = lreq->ping_sent; 2263 } else if (!lreq->last_error) { 2264 lreq->last_error = normalize_watch_error(req->r_result); 2265 queue_watch_error(lreq); 2266 } 2267 } else { 2268 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 2269 lreq->register_gen, req->r_ops[0].watch.gen); 2270 } 2271 2272 mutex_unlock(&lreq->lock); 2273 linger_put(lreq); 2274 } 2275 2276 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 2277 { 2278 struct ceph_osd_client *osdc = lreq->osdc; 2279 struct ceph_osd_request *req = lreq->ping_req; 2280 struct ceph_osd_req_op *op = &req->r_ops[0]; 2281 2282 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2283 dout("%s PAUSERD\n", __func__); 2284 return; 2285 } 2286 2287 lreq->ping_sent = jiffies; 2288 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 2289 __func__, lreq, lreq->linger_id, lreq->ping_sent, 2290 lreq->register_gen); 2291 2292 if (req->r_osd) 2293 cancel_linger_request(req); 2294 2295 request_reinit(req); 2296 target_copy(&req->r_t, &lreq->t); 2297 2298 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2299 op->watch.cookie != lreq->linger_id || 2300 op->watch.op != CEPH_OSD_WATCH_OP_PING); 2301 op->watch.gen = lreq->register_gen; 2302 req->r_callback = linger_ping_cb; 2303 req->r_priv = linger_get(lreq); 2304 req->r_linger = true; 2305 2306 ceph_osdc_get_request(req); 2307 account_request(req); 2308 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2309 link_request(lreq->osd, req); 2310 send_request(req); 2311 } 2312 2313 static void linger_submit(struct ceph_osd_linger_request *lreq) 2314 { 2315 struct ceph_osd_client *osdc = lreq->osdc; 2316 struct ceph_osd *osd; 2317 2318 calc_target(osdc, &lreq->t, &lreq->last_force_resend, false); 2319 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2320 link_linger(osd, lreq); 2321 2322 send_linger(lreq); 2323 } 2324 2325 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 2326 { 2327 struct ceph_osd_client *osdc = lreq->osdc; 2328 struct ceph_osd_linger_request *lookup_lreq; 2329 2330 verify_osdc_wrlocked(osdc); 2331 2332 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2333 lreq->linger_id); 2334 if (!lookup_lreq) 2335 return; 2336 2337 WARN_ON(lookup_lreq != lreq); 2338 erase_linger_mc(&osdc->linger_map_checks, lreq); 2339 linger_put(lreq); 2340 } 2341 2342 /* 2343 * @lreq has to be both registered and linked. 2344 */ 2345 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 2346 { 2347 if (lreq->is_watch && lreq->ping_req->r_osd) 2348 cancel_linger_request(lreq->ping_req); 2349 if (lreq->reg_req->r_osd) 2350 cancel_linger_request(lreq->reg_req); 2351 cancel_linger_map_check(lreq); 2352 unlink_linger(lreq->osd, lreq); 2353 linger_unregister(lreq); 2354 } 2355 2356 static void linger_cancel(struct ceph_osd_linger_request *lreq) 2357 { 2358 struct ceph_osd_client *osdc = lreq->osdc; 2359 2360 down_write(&osdc->lock); 2361 if (__linger_registered(lreq)) 2362 __linger_cancel(lreq); 2363 up_write(&osdc->lock); 2364 } 2365 2366 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 2367 2368 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 2369 { 2370 struct ceph_osd_client *osdc = lreq->osdc; 2371 struct ceph_osdmap *map = osdc->osdmap; 2372 2373 verify_osdc_wrlocked(osdc); 2374 WARN_ON(!map->epoch); 2375 2376 if (lreq->register_gen) { 2377 lreq->map_dne_bound = map->epoch; 2378 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 2379 lreq, lreq->linger_id); 2380 } else { 2381 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 2382 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2383 map->epoch); 2384 } 2385 2386 if (lreq->map_dne_bound) { 2387 if (map->epoch >= lreq->map_dne_bound) { 2388 /* we had a new enough map */ 2389 pr_info("linger_id %llu pool does not exist\n", 2390 lreq->linger_id); 2391 linger_reg_commit_complete(lreq, -ENOENT); 2392 __linger_cancel(lreq); 2393 } 2394 } else { 2395 send_linger_map_check(lreq); 2396 } 2397 } 2398 2399 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 2400 { 2401 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2402 struct ceph_osd_linger_request *lreq; 2403 u64 linger_id = greq->private_data; 2404 2405 WARN_ON(greq->result || !greq->u.newest); 2406 2407 down_write(&osdc->lock); 2408 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 2409 if (!lreq) { 2410 dout("%s linger_id %llu dne\n", __func__, linger_id); 2411 goto out_unlock; 2412 } 2413 2414 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 2415 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2416 greq->u.newest); 2417 if (!lreq->map_dne_bound) 2418 lreq->map_dne_bound = greq->u.newest; 2419 erase_linger_mc(&osdc->linger_map_checks, lreq); 2420 check_linger_pool_dne(lreq); 2421 2422 linger_put(lreq); 2423 out_unlock: 2424 up_write(&osdc->lock); 2425 } 2426 2427 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 2428 { 2429 struct ceph_osd_client *osdc = lreq->osdc; 2430 struct ceph_osd_linger_request *lookup_lreq; 2431 int ret; 2432 2433 verify_osdc_wrlocked(osdc); 2434 2435 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2436 lreq->linger_id); 2437 if (lookup_lreq) { 2438 WARN_ON(lookup_lreq != lreq); 2439 return; 2440 } 2441 2442 linger_get(lreq); 2443 insert_linger_mc(&osdc->linger_map_checks, lreq); 2444 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2445 linger_map_check_cb, lreq->linger_id); 2446 WARN_ON(ret); 2447 } 2448 2449 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 2450 { 2451 int ret; 2452 2453 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2454 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 2455 return ret ?: lreq->reg_commit_error; 2456 } 2457 2458 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 2459 { 2460 int ret; 2461 2462 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2463 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 2464 return ret ?: lreq->notify_finish_error; 2465 } 2466 2467 /* 2468 * Timeout callback, called every N seconds. When 1 or more OSD 2469 * requests has been active for more than N seconds, we send a keepalive 2470 * (tag + timestamp) to its OSD to ensure any communications channel 2471 * reset is detected. 2472 */ 2473 static void handle_timeout(struct work_struct *work) 2474 { 2475 struct ceph_osd_client *osdc = 2476 container_of(work, struct ceph_osd_client, timeout_work.work); 2477 struct ceph_options *opts = osdc->client->options; 2478 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 2479 LIST_HEAD(slow_osds); 2480 struct rb_node *n, *p; 2481 2482 dout("%s osdc %p\n", __func__, osdc); 2483 down_write(&osdc->lock); 2484 2485 /* 2486 * ping osds that are a bit slow. this ensures that if there 2487 * is a break in the TCP connection we will notice, and reopen 2488 * a connection with that osd (from the fault callback). 2489 */ 2490 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 2491 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 2492 bool found = false; 2493 2494 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 2495 struct ceph_osd_request *req = 2496 rb_entry(p, struct ceph_osd_request, r_node); 2497 2498 if (time_before(req->r_stamp, cutoff)) { 2499 dout(" req %p tid %llu on osd%d is laggy\n", 2500 req, req->r_tid, osd->o_osd); 2501 found = true; 2502 } 2503 } 2504 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 2505 struct ceph_osd_linger_request *lreq = 2506 rb_entry(p, struct ceph_osd_linger_request, node); 2507 2508 dout(" lreq %p linger_id %llu is served by osd%d\n", 2509 lreq, lreq->linger_id, osd->o_osd); 2510 found = true; 2511 2512 mutex_lock(&lreq->lock); 2513 if (lreq->is_watch && lreq->committed && !lreq->last_error) 2514 send_linger_ping(lreq); 2515 mutex_unlock(&lreq->lock); 2516 } 2517 2518 if (found) 2519 list_move_tail(&osd->o_keepalive_item, &slow_osds); 2520 } 2521 2522 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 2523 maybe_request_map(osdc); 2524 2525 while (!list_empty(&slow_osds)) { 2526 struct ceph_osd *osd = list_first_entry(&slow_osds, 2527 struct ceph_osd, 2528 o_keepalive_item); 2529 list_del_init(&osd->o_keepalive_item); 2530 ceph_con_keepalive(&osd->o_con); 2531 } 2532 2533 up_write(&osdc->lock); 2534 schedule_delayed_work(&osdc->timeout_work, 2535 osdc->client->options->osd_keepalive_timeout); 2536 } 2537 2538 static void handle_osds_timeout(struct work_struct *work) 2539 { 2540 struct ceph_osd_client *osdc = 2541 container_of(work, struct ceph_osd_client, 2542 osds_timeout_work.work); 2543 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 2544 struct ceph_osd *osd, *nosd; 2545 2546 dout("%s osdc %p\n", __func__, osdc); 2547 down_write(&osdc->lock); 2548 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 2549 if (time_before(jiffies, osd->lru_ttl)) 2550 break; 2551 2552 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 2553 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 2554 close_osd(osd); 2555 } 2556 2557 up_write(&osdc->lock); 2558 schedule_delayed_work(&osdc->osds_timeout_work, 2559 round_jiffies_relative(delay)); 2560 } 2561 2562 static int ceph_oloc_decode(void **p, void *end, 2563 struct ceph_object_locator *oloc) 2564 { 2565 u8 struct_v, struct_cv; 2566 u32 len; 2567 void *struct_end; 2568 int ret = 0; 2569 2570 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2571 struct_v = ceph_decode_8(p); 2572 struct_cv = ceph_decode_8(p); 2573 if (struct_v < 3) { 2574 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 2575 struct_v, struct_cv); 2576 goto e_inval; 2577 } 2578 if (struct_cv > 6) { 2579 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 2580 struct_v, struct_cv); 2581 goto e_inval; 2582 } 2583 len = ceph_decode_32(p); 2584 ceph_decode_need(p, end, len, e_inval); 2585 struct_end = *p + len; 2586 2587 oloc->pool = ceph_decode_64(p); 2588 *p += 4; /* skip preferred */ 2589 2590 len = ceph_decode_32(p); 2591 if (len > 0) { 2592 pr_warn("ceph_object_locator::key is set\n"); 2593 goto e_inval; 2594 } 2595 2596 if (struct_v >= 5) { 2597 len = ceph_decode_32(p); 2598 if (len > 0) { 2599 pr_warn("ceph_object_locator::nspace is set\n"); 2600 goto e_inval; 2601 } 2602 } 2603 2604 if (struct_v >= 6) { 2605 s64 hash = ceph_decode_64(p); 2606 if (hash != -1) { 2607 pr_warn("ceph_object_locator::hash is set\n"); 2608 goto e_inval; 2609 } 2610 } 2611 2612 /* skip the rest */ 2613 *p = struct_end; 2614 out: 2615 return ret; 2616 2617 e_inval: 2618 ret = -EINVAL; 2619 goto out; 2620 } 2621 2622 static int ceph_redirect_decode(void **p, void *end, 2623 struct ceph_request_redirect *redir) 2624 { 2625 u8 struct_v, struct_cv; 2626 u32 len; 2627 void *struct_end; 2628 int ret; 2629 2630 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2631 struct_v = ceph_decode_8(p); 2632 struct_cv = ceph_decode_8(p); 2633 if (struct_cv > 1) { 2634 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 2635 struct_v, struct_cv); 2636 goto e_inval; 2637 } 2638 len = ceph_decode_32(p); 2639 ceph_decode_need(p, end, len, e_inval); 2640 struct_end = *p + len; 2641 2642 ret = ceph_oloc_decode(p, end, &redir->oloc); 2643 if (ret) 2644 goto out; 2645 2646 len = ceph_decode_32(p); 2647 if (len > 0) { 2648 pr_warn("ceph_request_redirect::object_name is set\n"); 2649 goto e_inval; 2650 } 2651 2652 len = ceph_decode_32(p); 2653 *p += len; /* skip osd_instructions */ 2654 2655 /* skip the rest */ 2656 *p = struct_end; 2657 out: 2658 return ret; 2659 2660 e_inval: 2661 ret = -EINVAL; 2662 goto out; 2663 } 2664 2665 struct MOSDOpReply { 2666 struct ceph_pg pgid; 2667 u64 flags; 2668 int result; 2669 u32 epoch; 2670 int num_ops; 2671 u32 outdata_len[CEPH_OSD_MAX_OPS]; 2672 s32 rval[CEPH_OSD_MAX_OPS]; 2673 int retry_attempt; 2674 struct ceph_eversion replay_version; 2675 u64 user_version; 2676 struct ceph_request_redirect redirect; 2677 }; 2678 2679 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 2680 { 2681 void *p = msg->front.iov_base; 2682 void *const end = p + msg->front.iov_len; 2683 u16 version = le16_to_cpu(msg->hdr.version); 2684 struct ceph_eversion bad_replay_version; 2685 u8 decode_redir; 2686 u32 len; 2687 int ret; 2688 int i; 2689 2690 ceph_decode_32_safe(&p, end, len, e_inval); 2691 ceph_decode_need(&p, end, len, e_inval); 2692 p += len; /* skip oid */ 2693 2694 ret = ceph_decode_pgid(&p, end, &m->pgid); 2695 if (ret) 2696 return ret; 2697 2698 ceph_decode_64_safe(&p, end, m->flags, e_inval); 2699 ceph_decode_32_safe(&p, end, m->result, e_inval); 2700 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 2701 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 2702 p += sizeof(bad_replay_version); 2703 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 2704 2705 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 2706 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 2707 goto e_inval; 2708 2709 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 2710 e_inval); 2711 for (i = 0; i < m->num_ops; i++) { 2712 struct ceph_osd_op *op = p; 2713 2714 m->outdata_len[i] = le32_to_cpu(op->payload_len); 2715 p += sizeof(*op); 2716 } 2717 2718 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 2719 for (i = 0; i < m->num_ops; i++) 2720 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 2721 2722 if (version >= 5) { 2723 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 2724 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 2725 p += sizeof(m->replay_version); 2726 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 2727 } else { 2728 m->replay_version = bad_replay_version; /* struct */ 2729 m->user_version = le64_to_cpu(m->replay_version.version); 2730 } 2731 2732 if (version >= 6) { 2733 if (version >= 7) 2734 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 2735 else 2736 decode_redir = 1; 2737 } else { 2738 decode_redir = 0; 2739 } 2740 2741 if (decode_redir) { 2742 ret = ceph_redirect_decode(&p, end, &m->redirect); 2743 if (ret) 2744 return ret; 2745 } else { 2746 ceph_oloc_init(&m->redirect.oloc); 2747 } 2748 2749 return 0; 2750 2751 e_inval: 2752 return -EINVAL; 2753 } 2754 2755 /* 2756 * We are done with @req if 2757 * - @m is a safe reply, or 2758 * - @m is an unsafe reply and we didn't want a safe one 2759 */ 2760 static bool done_request(const struct ceph_osd_request *req, 2761 const struct MOSDOpReply *m) 2762 { 2763 return (m->result < 0 || 2764 (m->flags & CEPH_OSD_FLAG_ONDISK) || 2765 !(req->r_flags & CEPH_OSD_FLAG_ONDISK)); 2766 } 2767 2768 /* 2769 * handle osd op reply. either call the callback if it is specified, 2770 * or do the completion to wake up the waiting thread. 2771 * 2772 * ->r_unsafe_callback is set? yes no 2773 * 2774 * first reply is OK (needed r_cb/r_completion, r_cb/r_completion, 2775 * any or needed/got safe) r_safe_completion r_safe_completion 2776 * 2777 * first reply is unsafe r_unsafe_cb(true) (nothing) 2778 * 2779 * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion, 2780 * r_safe_completion r_safe_completion 2781 */ 2782 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 2783 { 2784 struct ceph_osd_client *osdc = osd->o_osdc; 2785 struct ceph_osd_request *req; 2786 struct MOSDOpReply m; 2787 u64 tid = le64_to_cpu(msg->hdr.tid); 2788 u32 data_len = 0; 2789 bool already_acked; 2790 int ret; 2791 int i; 2792 2793 dout("%s msg %p tid %llu\n", __func__, msg, tid); 2794 2795 down_read(&osdc->lock); 2796 if (!osd_registered(osd)) { 2797 dout("%s osd%d unknown\n", __func__, osd->o_osd); 2798 goto out_unlock_osdc; 2799 } 2800 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 2801 2802 mutex_lock(&osd->lock); 2803 req = lookup_request(&osd->o_requests, tid); 2804 if (!req) { 2805 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 2806 goto out_unlock_session; 2807 } 2808 2809 ret = decode_MOSDOpReply(msg, &m); 2810 if (ret) { 2811 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 2812 req->r_tid, ret); 2813 ceph_msg_dump(msg); 2814 goto fail_request; 2815 } 2816 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 2817 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 2818 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 2819 le64_to_cpu(m.replay_version.version), m.user_version); 2820 2821 if (m.retry_attempt >= 0) { 2822 if (m.retry_attempt != req->r_attempts - 1) { 2823 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 2824 req, req->r_tid, m.retry_attempt, 2825 req->r_attempts - 1); 2826 goto out_unlock_session; 2827 } 2828 } else { 2829 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 2830 } 2831 2832 if (!ceph_oloc_empty(&m.redirect.oloc)) { 2833 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 2834 m.redirect.oloc.pool); 2835 unlink_request(osd, req); 2836 mutex_unlock(&osd->lock); 2837 2838 ceph_oloc_copy(&req->r_t.target_oloc, &m.redirect.oloc); 2839 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED; 2840 req->r_tid = 0; 2841 __submit_request(req, false); 2842 goto out_unlock_osdc; 2843 } 2844 2845 if (m.num_ops != req->r_num_ops) { 2846 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 2847 req->r_num_ops, req->r_tid); 2848 goto fail_request; 2849 } 2850 for (i = 0; i < req->r_num_ops; i++) { 2851 dout(" req %p tid %llu op %d rval %d len %u\n", req, 2852 req->r_tid, i, m.rval[i], m.outdata_len[i]); 2853 req->r_ops[i].rval = m.rval[i]; 2854 req->r_ops[i].outdata_len = m.outdata_len[i]; 2855 data_len += m.outdata_len[i]; 2856 } 2857 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 2858 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 2859 le32_to_cpu(msg->hdr.data_len), req->r_tid); 2860 goto fail_request; 2861 } 2862 dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__, 2863 req, req->r_tid, req->r_got_reply, m.result, data_len); 2864 2865 already_acked = req->r_got_reply; 2866 if (!already_acked) { 2867 req->r_result = m.result ?: data_len; 2868 req->r_replay_version = m.replay_version; /* struct */ 2869 req->r_got_reply = true; 2870 } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) { 2871 dout("req %p tid %llu dup ack\n", req, req->r_tid); 2872 goto out_unlock_session; 2873 } 2874 2875 if (done_request(req, &m)) { 2876 __finish_request(req); 2877 if (req->r_linger) { 2878 WARN_ON(req->r_unsafe_callback); 2879 dout("req %p tid %llu cb (locked)\n", req, req->r_tid); 2880 __complete_request(req); 2881 } 2882 } 2883 2884 mutex_unlock(&osd->lock); 2885 up_read(&osdc->lock); 2886 2887 if (done_request(req, &m)) { 2888 if (already_acked && req->r_unsafe_callback) { 2889 dout("req %p tid %llu safe-cb\n", req, req->r_tid); 2890 req->r_unsafe_callback(req, false); 2891 } else if (!req->r_linger) { 2892 dout("req %p tid %llu cb\n", req, req->r_tid); 2893 __complete_request(req); 2894 } 2895 if (m.flags & CEPH_OSD_FLAG_ONDISK) 2896 complete_all(&req->r_safe_completion); 2897 ceph_osdc_put_request(req); 2898 } else { 2899 if (req->r_unsafe_callback) { 2900 dout("req %p tid %llu unsafe-cb\n", req, req->r_tid); 2901 req->r_unsafe_callback(req, true); 2902 } else { 2903 WARN_ON(1); 2904 } 2905 } 2906 2907 return; 2908 2909 fail_request: 2910 complete_request(req, -EIO); 2911 out_unlock_session: 2912 mutex_unlock(&osd->lock); 2913 out_unlock_osdc: 2914 up_read(&osdc->lock); 2915 } 2916 2917 static void set_pool_was_full(struct ceph_osd_client *osdc) 2918 { 2919 struct rb_node *n; 2920 2921 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 2922 struct ceph_pg_pool_info *pi = 2923 rb_entry(n, struct ceph_pg_pool_info, node); 2924 2925 pi->was_full = __pool_full(pi); 2926 } 2927 } 2928 2929 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 2930 { 2931 struct ceph_pg_pool_info *pi; 2932 2933 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 2934 if (!pi) 2935 return false; 2936 2937 return pi->was_full && !__pool_full(pi); 2938 } 2939 2940 static enum calc_target_result 2941 recalc_linger_target(struct ceph_osd_linger_request *lreq) 2942 { 2943 struct ceph_osd_client *osdc = lreq->osdc; 2944 enum calc_target_result ct_res; 2945 2946 ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true); 2947 if (ct_res == CALC_TARGET_NEED_RESEND) { 2948 struct ceph_osd *osd; 2949 2950 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2951 if (osd != lreq->osd) { 2952 unlink_linger(lreq->osd, lreq); 2953 link_linger(osd, lreq); 2954 } 2955 } 2956 2957 return ct_res; 2958 } 2959 2960 /* 2961 * Requeue requests whose mapping to an OSD has changed. 2962 */ 2963 static void scan_requests(struct ceph_osd *osd, 2964 bool force_resend, 2965 bool cleared_full, 2966 bool check_pool_cleared_full, 2967 struct rb_root *need_resend, 2968 struct list_head *need_resend_linger) 2969 { 2970 struct ceph_osd_client *osdc = osd->o_osdc; 2971 struct rb_node *n; 2972 bool force_resend_writes; 2973 2974 for (n = rb_first(&osd->o_linger_requests); n; ) { 2975 struct ceph_osd_linger_request *lreq = 2976 rb_entry(n, struct ceph_osd_linger_request, node); 2977 enum calc_target_result ct_res; 2978 2979 n = rb_next(n); /* recalc_linger_target() */ 2980 2981 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 2982 lreq->linger_id); 2983 ct_res = recalc_linger_target(lreq); 2984 switch (ct_res) { 2985 case CALC_TARGET_NO_ACTION: 2986 force_resend_writes = cleared_full || 2987 (check_pool_cleared_full && 2988 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 2989 if (!force_resend && !force_resend_writes) 2990 break; 2991 2992 /* fall through */ 2993 case CALC_TARGET_NEED_RESEND: 2994 cancel_linger_map_check(lreq); 2995 /* 2996 * scan_requests() for the previous epoch(s) 2997 * may have already added it to the list, since 2998 * it's not unlinked here. 2999 */ 3000 if (list_empty(&lreq->scan_item)) 3001 list_add_tail(&lreq->scan_item, need_resend_linger); 3002 break; 3003 case CALC_TARGET_POOL_DNE: 3004 check_linger_pool_dne(lreq); 3005 break; 3006 } 3007 } 3008 3009 for (n = rb_first(&osd->o_requests); n; ) { 3010 struct ceph_osd_request *req = 3011 rb_entry(n, struct ceph_osd_request, r_node); 3012 enum calc_target_result ct_res; 3013 3014 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3015 3016 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3017 ct_res = calc_target(osdc, &req->r_t, 3018 &req->r_last_force_resend, false); 3019 switch (ct_res) { 3020 case CALC_TARGET_NO_ACTION: 3021 force_resend_writes = cleared_full || 3022 (check_pool_cleared_full && 3023 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3024 if (!force_resend && 3025 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3026 !force_resend_writes)) 3027 break; 3028 3029 /* fall through */ 3030 case CALC_TARGET_NEED_RESEND: 3031 cancel_map_check(req); 3032 unlink_request(osd, req); 3033 insert_request(need_resend, req); 3034 break; 3035 case CALC_TARGET_POOL_DNE: 3036 check_pool_dne(req); 3037 break; 3038 } 3039 } 3040 } 3041 3042 static int handle_one_map(struct ceph_osd_client *osdc, 3043 void *p, void *end, bool incremental, 3044 struct rb_root *need_resend, 3045 struct list_head *need_resend_linger) 3046 { 3047 struct ceph_osdmap *newmap; 3048 struct rb_node *n; 3049 bool skipped_map = false; 3050 bool was_full; 3051 3052 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3053 set_pool_was_full(osdc); 3054 3055 if (incremental) 3056 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3057 else 3058 newmap = ceph_osdmap_decode(&p, end); 3059 if (IS_ERR(newmap)) 3060 return PTR_ERR(newmap); 3061 3062 if (newmap != osdc->osdmap) { 3063 /* 3064 * Preserve ->was_full before destroying the old map. 3065 * For pools that weren't in the old map, ->was_full 3066 * should be false. 3067 */ 3068 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3069 struct ceph_pg_pool_info *pi = 3070 rb_entry(n, struct ceph_pg_pool_info, node); 3071 struct ceph_pg_pool_info *old_pi; 3072 3073 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3074 if (old_pi) 3075 pi->was_full = old_pi->was_full; 3076 else 3077 WARN_ON(pi->was_full); 3078 } 3079 3080 if (osdc->osdmap->epoch && 3081 osdc->osdmap->epoch + 1 < newmap->epoch) { 3082 WARN_ON(incremental); 3083 skipped_map = true; 3084 } 3085 3086 ceph_osdmap_destroy(osdc->osdmap); 3087 osdc->osdmap = newmap; 3088 } 3089 3090 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3091 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3092 need_resend, need_resend_linger); 3093 3094 for (n = rb_first(&osdc->osds); n; ) { 3095 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3096 3097 n = rb_next(n); /* close_osd() */ 3098 3099 scan_requests(osd, skipped_map, was_full, true, need_resend, 3100 need_resend_linger); 3101 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3102 memcmp(&osd->o_con.peer_addr, 3103 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3104 sizeof(struct ceph_entity_addr))) 3105 close_osd(osd); 3106 } 3107 3108 return 0; 3109 } 3110 3111 static void kick_requests(struct ceph_osd_client *osdc, 3112 struct rb_root *need_resend, 3113 struct list_head *need_resend_linger) 3114 { 3115 struct ceph_osd_linger_request *lreq, *nlreq; 3116 struct rb_node *n; 3117 3118 for (n = rb_first(need_resend); n; ) { 3119 struct ceph_osd_request *req = 3120 rb_entry(n, struct ceph_osd_request, r_node); 3121 struct ceph_osd *osd; 3122 3123 n = rb_next(n); 3124 erase_request(need_resend, req); /* before link_request() */ 3125 3126 WARN_ON(req->r_osd); 3127 calc_target(osdc, &req->r_t, NULL, false); 3128 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3129 link_request(osd, req); 3130 if (!req->r_linger) { 3131 if (!osd_homeless(osd) && !req->r_t.paused) 3132 send_request(req); 3133 } else { 3134 cancel_linger_request(req); 3135 } 3136 } 3137 3138 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3139 if (!osd_homeless(lreq->osd)) 3140 send_linger(lreq); 3141 3142 list_del_init(&lreq->scan_item); 3143 } 3144 } 3145 3146 /* 3147 * Process updated osd map. 3148 * 3149 * The message contains any number of incremental and full maps, normally 3150 * indicating some sort of topology change in the cluster. Kick requests 3151 * off to different OSDs as needed. 3152 */ 3153 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3154 { 3155 void *p = msg->front.iov_base; 3156 void *const end = p + msg->front.iov_len; 3157 u32 nr_maps, maplen; 3158 u32 epoch; 3159 struct ceph_fsid fsid; 3160 struct rb_root need_resend = RB_ROOT; 3161 LIST_HEAD(need_resend_linger); 3162 bool handled_incremental = false; 3163 bool was_pauserd, was_pausewr; 3164 bool pauserd, pausewr; 3165 int err; 3166 3167 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3168 down_write(&osdc->lock); 3169 3170 /* verify fsid */ 3171 ceph_decode_need(&p, end, sizeof(fsid), bad); 3172 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3173 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3174 goto bad; 3175 3176 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3177 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3178 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3179 have_pool_full(osdc); 3180 3181 /* incremental maps */ 3182 ceph_decode_32_safe(&p, end, nr_maps, bad); 3183 dout(" %d inc maps\n", nr_maps); 3184 while (nr_maps > 0) { 3185 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3186 epoch = ceph_decode_32(&p); 3187 maplen = ceph_decode_32(&p); 3188 ceph_decode_need(&p, end, maplen, bad); 3189 if (osdc->osdmap->epoch && 3190 osdc->osdmap->epoch + 1 == epoch) { 3191 dout("applying incremental map %u len %d\n", 3192 epoch, maplen); 3193 err = handle_one_map(osdc, p, p + maplen, true, 3194 &need_resend, &need_resend_linger); 3195 if (err) 3196 goto bad; 3197 handled_incremental = true; 3198 } else { 3199 dout("ignoring incremental map %u len %d\n", 3200 epoch, maplen); 3201 } 3202 p += maplen; 3203 nr_maps--; 3204 } 3205 if (handled_incremental) 3206 goto done; 3207 3208 /* full maps */ 3209 ceph_decode_32_safe(&p, end, nr_maps, bad); 3210 dout(" %d full maps\n", nr_maps); 3211 while (nr_maps) { 3212 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3213 epoch = ceph_decode_32(&p); 3214 maplen = ceph_decode_32(&p); 3215 ceph_decode_need(&p, end, maplen, bad); 3216 if (nr_maps > 1) { 3217 dout("skipping non-latest full map %u len %d\n", 3218 epoch, maplen); 3219 } else if (osdc->osdmap->epoch >= epoch) { 3220 dout("skipping full map %u len %d, " 3221 "older than our %u\n", epoch, maplen, 3222 osdc->osdmap->epoch); 3223 } else { 3224 dout("taking full map %u len %d\n", epoch, maplen); 3225 err = handle_one_map(osdc, p, p + maplen, false, 3226 &need_resend, &need_resend_linger); 3227 if (err) 3228 goto bad; 3229 } 3230 p += maplen; 3231 nr_maps--; 3232 } 3233 3234 done: 3235 /* 3236 * subscribe to subsequent osdmap updates if full to ensure 3237 * we find out when we are no longer full and stop returning 3238 * ENOSPC. 3239 */ 3240 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3241 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3242 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3243 have_pool_full(osdc); 3244 if (was_pauserd || was_pausewr || pauserd || pausewr) 3245 maybe_request_map(osdc); 3246 3247 kick_requests(osdc, &need_resend, &need_resend_linger); 3248 3249 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 3250 osdc->osdmap->epoch); 3251 up_write(&osdc->lock); 3252 wake_up_all(&osdc->client->auth_wq); 3253 return; 3254 3255 bad: 3256 pr_err("osdc handle_map corrupt msg\n"); 3257 ceph_msg_dump(msg); 3258 up_write(&osdc->lock); 3259 } 3260 3261 /* 3262 * Resubmit requests pending on the given osd. 3263 */ 3264 static void kick_osd_requests(struct ceph_osd *osd) 3265 { 3266 struct rb_node *n; 3267 3268 for (n = rb_first(&osd->o_requests); n; ) { 3269 struct ceph_osd_request *req = 3270 rb_entry(n, struct ceph_osd_request, r_node); 3271 3272 n = rb_next(n); /* cancel_linger_request() */ 3273 3274 if (!req->r_linger) { 3275 if (!req->r_t.paused) 3276 send_request(req); 3277 } else { 3278 cancel_linger_request(req); 3279 } 3280 } 3281 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 3282 struct ceph_osd_linger_request *lreq = 3283 rb_entry(n, struct ceph_osd_linger_request, node); 3284 3285 send_linger(lreq); 3286 } 3287 } 3288 3289 /* 3290 * If the osd connection drops, we need to resubmit all requests. 3291 */ 3292 static void osd_fault(struct ceph_connection *con) 3293 { 3294 struct ceph_osd *osd = con->private; 3295 struct ceph_osd_client *osdc = osd->o_osdc; 3296 3297 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 3298 3299 down_write(&osdc->lock); 3300 if (!osd_registered(osd)) { 3301 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3302 goto out_unlock; 3303 } 3304 3305 if (!reopen_osd(osd)) 3306 kick_osd_requests(osd); 3307 maybe_request_map(osdc); 3308 3309 out_unlock: 3310 up_write(&osdc->lock); 3311 } 3312 3313 /* 3314 * Process osd watch notifications 3315 */ 3316 static void handle_watch_notify(struct ceph_osd_client *osdc, 3317 struct ceph_msg *msg) 3318 { 3319 void *p = msg->front.iov_base; 3320 void *const end = p + msg->front.iov_len; 3321 struct ceph_osd_linger_request *lreq; 3322 struct linger_work *lwork; 3323 u8 proto_ver, opcode; 3324 u64 cookie, notify_id; 3325 u64 notifier_id = 0; 3326 s32 return_code = 0; 3327 void *payload = NULL; 3328 u32 payload_len = 0; 3329 3330 ceph_decode_8_safe(&p, end, proto_ver, bad); 3331 ceph_decode_8_safe(&p, end, opcode, bad); 3332 ceph_decode_64_safe(&p, end, cookie, bad); 3333 p += 8; /* skip ver */ 3334 ceph_decode_64_safe(&p, end, notify_id, bad); 3335 3336 if (proto_ver >= 1) { 3337 ceph_decode_32_safe(&p, end, payload_len, bad); 3338 ceph_decode_need(&p, end, payload_len, bad); 3339 payload = p; 3340 p += payload_len; 3341 } 3342 3343 if (le16_to_cpu(msg->hdr.version) >= 2) 3344 ceph_decode_32_safe(&p, end, return_code, bad); 3345 3346 if (le16_to_cpu(msg->hdr.version) >= 3) 3347 ceph_decode_64_safe(&p, end, notifier_id, bad); 3348 3349 down_read(&osdc->lock); 3350 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 3351 if (!lreq) { 3352 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 3353 cookie); 3354 goto out_unlock_osdc; 3355 } 3356 3357 mutex_lock(&lreq->lock); 3358 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 3359 opcode, cookie, lreq, lreq->is_watch); 3360 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 3361 if (!lreq->last_error) { 3362 lreq->last_error = -ENOTCONN; 3363 queue_watch_error(lreq); 3364 } 3365 } else if (!lreq->is_watch) { 3366 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 3367 if (lreq->notify_id && lreq->notify_id != notify_id) { 3368 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 3369 lreq->notify_id, notify_id); 3370 } else if (!completion_done(&lreq->notify_finish_wait)) { 3371 struct ceph_msg_data *data = 3372 list_first_entry_or_null(&msg->data, 3373 struct ceph_msg_data, 3374 links); 3375 3376 if (data) { 3377 if (lreq->preply_pages) { 3378 WARN_ON(data->type != 3379 CEPH_MSG_DATA_PAGES); 3380 *lreq->preply_pages = data->pages; 3381 *lreq->preply_len = data->length; 3382 } else { 3383 ceph_release_page_vector(data->pages, 3384 calc_pages_for(0, data->length)); 3385 } 3386 } 3387 lreq->notify_finish_error = return_code; 3388 complete_all(&lreq->notify_finish_wait); 3389 } 3390 } else { 3391 /* CEPH_WATCH_EVENT_NOTIFY */ 3392 lwork = lwork_alloc(lreq, do_watch_notify); 3393 if (!lwork) { 3394 pr_err("failed to allocate notify-lwork\n"); 3395 goto out_unlock_lreq; 3396 } 3397 3398 lwork->notify.notify_id = notify_id; 3399 lwork->notify.notifier_id = notifier_id; 3400 lwork->notify.payload = payload; 3401 lwork->notify.payload_len = payload_len; 3402 lwork->notify.msg = ceph_msg_get(msg); 3403 lwork_queue(lwork); 3404 } 3405 3406 out_unlock_lreq: 3407 mutex_unlock(&lreq->lock); 3408 out_unlock_osdc: 3409 up_read(&osdc->lock); 3410 return; 3411 3412 bad: 3413 pr_err("osdc handle_watch_notify corrupt msg\n"); 3414 } 3415 3416 /* 3417 * Register request, send initial attempt. 3418 */ 3419 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 3420 struct ceph_osd_request *req, 3421 bool nofail) 3422 { 3423 down_read(&osdc->lock); 3424 submit_request(req, false); 3425 up_read(&osdc->lock); 3426 3427 return 0; 3428 } 3429 EXPORT_SYMBOL(ceph_osdc_start_request); 3430 3431 /* 3432 * Unregister a registered request. The request is not completed (i.e. 3433 * no callbacks or wakeups) - higher layers are supposed to know what 3434 * they are canceling. 3435 */ 3436 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 3437 { 3438 struct ceph_osd_client *osdc = req->r_osdc; 3439 3440 down_write(&osdc->lock); 3441 if (req->r_osd) 3442 cancel_request(req); 3443 up_write(&osdc->lock); 3444 } 3445 EXPORT_SYMBOL(ceph_osdc_cancel_request); 3446 3447 /* 3448 * @timeout: in jiffies, 0 means "wait forever" 3449 */ 3450 static int wait_request_timeout(struct ceph_osd_request *req, 3451 unsigned long timeout) 3452 { 3453 long left; 3454 3455 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3456 left = wait_for_completion_killable_timeout(&req->r_completion, 3457 ceph_timeout_jiffies(timeout)); 3458 if (left <= 0) { 3459 left = left ?: -ETIMEDOUT; 3460 ceph_osdc_cancel_request(req); 3461 3462 /* kludge - need to to wake ceph_osdc_sync() */ 3463 complete_all(&req->r_safe_completion); 3464 } else { 3465 left = req->r_result; /* completed */ 3466 } 3467 3468 return left; 3469 } 3470 3471 /* 3472 * wait for a request to complete 3473 */ 3474 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 3475 struct ceph_osd_request *req) 3476 { 3477 return wait_request_timeout(req, 0); 3478 } 3479 EXPORT_SYMBOL(ceph_osdc_wait_request); 3480 3481 /* 3482 * sync - wait for all in-flight requests to flush. avoid starvation. 3483 */ 3484 void ceph_osdc_sync(struct ceph_osd_client *osdc) 3485 { 3486 struct rb_node *n, *p; 3487 u64 last_tid = atomic64_read(&osdc->last_tid); 3488 3489 again: 3490 down_read(&osdc->lock); 3491 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3492 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3493 3494 mutex_lock(&osd->lock); 3495 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 3496 struct ceph_osd_request *req = 3497 rb_entry(p, struct ceph_osd_request, r_node); 3498 3499 if (req->r_tid > last_tid) 3500 break; 3501 3502 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 3503 continue; 3504 3505 ceph_osdc_get_request(req); 3506 mutex_unlock(&osd->lock); 3507 up_read(&osdc->lock); 3508 dout("%s waiting on req %p tid %llu last_tid %llu\n", 3509 __func__, req, req->r_tid, last_tid); 3510 wait_for_completion(&req->r_safe_completion); 3511 ceph_osdc_put_request(req); 3512 goto again; 3513 } 3514 3515 mutex_unlock(&osd->lock); 3516 } 3517 3518 up_read(&osdc->lock); 3519 dout("%s done last_tid %llu\n", __func__, last_tid); 3520 } 3521 EXPORT_SYMBOL(ceph_osdc_sync); 3522 3523 static struct ceph_osd_request * 3524 alloc_linger_request(struct ceph_osd_linger_request *lreq) 3525 { 3526 struct ceph_osd_request *req; 3527 3528 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 3529 if (!req) 3530 return NULL; 3531 3532 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3533 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3534 3535 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 3536 ceph_osdc_put_request(req); 3537 return NULL; 3538 } 3539 3540 return req; 3541 } 3542 3543 /* 3544 * Returns a handle, caller owns a ref. 3545 */ 3546 struct ceph_osd_linger_request * 3547 ceph_osdc_watch(struct ceph_osd_client *osdc, 3548 struct ceph_object_id *oid, 3549 struct ceph_object_locator *oloc, 3550 rados_watchcb2_t wcb, 3551 rados_watcherrcb_t errcb, 3552 void *data) 3553 { 3554 struct ceph_osd_linger_request *lreq; 3555 int ret; 3556 3557 lreq = linger_alloc(osdc); 3558 if (!lreq) 3559 return ERR_PTR(-ENOMEM); 3560 3561 lreq->is_watch = true; 3562 lreq->wcb = wcb; 3563 lreq->errcb = errcb; 3564 lreq->data = data; 3565 lreq->watch_valid_thru = jiffies; 3566 3567 ceph_oid_copy(&lreq->t.base_oid, oid); 3568 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3569 lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3570 lreq->mtime = CURRENT_TIME; 3571 3572 lreq->reg_req = alloc_linger_request(lreq); 3573 if (!lreq->reg_req) { 3574 ret = -ENOMEM; 3575 goto err_put_lreq; 3576 } 3577 3578 lreq->ping_req = alloc_linger_request(lreq); 3579 if (!lreq->ping_req) { 3580 ret = -ENOMEM; 3581 goto err_put_lreq; 3582 } 3583 3584 down_write(&osdc->lock); 3585 linger_register(lreq); /* before osd_req_op_* */ 3586 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id, 3587 CEPH_OSD_WATCH_OP_WATCH); 3588 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id, 3589 CEPH_OSD_WATCH_OP_PING); 3590 linger_submit(lreq); 3591 up_write(&osdc->lock); 3592 3593 ret = linger_reg_commit_wait(lreq); 3594 if (ret) { 3595 linger_cancel(lreq); 3596 goto err_put_lreq; 3597 } 3598 3599 return lreq; 3600 3601 err_put_lreq: 3602 linger_put(lreq); 3603 return ERR_PTR(ret); 3604 } 3605 EXPORT_SYMBOL(ceph_osdc_watch); 3606 3607 /* 3608 * Releases a ref. 3609 * 3610 * Times out after mount_timeout to preserve rbd unmap behaviour 3611 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 3612 * with mount_timeout"). 3613 */ 3614 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 3615 struct ceph_osd_linger_request *lreq) 3616 { 3617 struct ceph_options *opts = osdc->client->options; 3618 struct ceph_osd_request *req; 3619 int ret; 3620 3621 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3622 if (!req) 3623 return -ENOMEM; 3624 3625 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3626 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3627 req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3628 req->r_mtime = CURRENT_TIME; 3629 osd_req_op_watch_init(req, 0, lreq->linger_id, 3630 CEPH_OSD_WATCH_OP_UNWATCH); 3631 3632 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3633 if (ret) 3634 goto out_put_req; 3635 3636 ceph_osdc_start_request(osdc, req, false); 3637 linger_cancel(lreq); 3638 linger_put(lreq); 3639 ret = wait_request_timeout(req, opts->mount_timeout); 3640 3641 out_put_req: 3642 ceph_osdc_put_request(req); 3643 return ret; 3644 } 3645 EXPORT_SYMBOL(ceph_osdc_unwatch); 3646 3647 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 3648 u64 notify_id, u64 cookie, void *payload, 3649 size_t payload_len) 3650 { 3651 struct ceph_osd_req_op *op; 3652 struct ceph_pagelist *pl; 3653 int ret; 3654 3655 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 3656 3657 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3658 if (!pl) 3659 return -ENOMEM; 3660 3661 ceph_pagelist_init(pl); 3662 ret = ceph_pagelist_encode_64(pl, notify_id); 3663 ret |= ceph_pagelist_encode_64(pl, cookie); 3664 if (payload) { 3665 ret |= ceph_pagelist_encode_32(pl, payload_len); 3666 ret |= ceph_pagelist_append(pl, payload, payload_len); 3667 } else { 3668 ret |= ceph_pagelist_encode_32(pl, 0); 3669 } 3670 if (ret) { 3671 ceph_pagelist_release(pl); 3672 return -ENOMEM; 3673 } 3674 3675 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 3676 op->indata_len = pl->length; 3677 return 0; 3678 } 3679 3680 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 3681 struct ceph_object_id *oid, 3682 struct ceph_object_locator *oloc, 3683 u64 notify_id, 3684 u64 cookie, 3685 void *payload, 3686 size_t payload_len) 3687 { 3688 struct ceph_osd_request *req; 3689 int ret; 3690 3691 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3692 if (!req) 3693 return -ENOMEM; 3694 3695 ceph_oid_copy(&req->r_base_oid, oid); 3696 ceph_oloc_copy(&req->r_base_oloc, oloc); 3697 req->r_flags = CEPH_OSD_FLAG_READ; 3698 3699 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3700 if (ret) 3701 goto out_put_req; 3702 3703 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 3704 payload_len); 3705 if (ret) 3706 goto out_put_req; 3707 3708 ceph_osdc_start_request(osdc, req, false); 3709 ret = ceph_osdc_wait_request(osdc, req); 3710 3711 out_put_req: 3712 ceph_osdc_put_request(req); 3713 return ret; 3714 } 3715 EXPORT_SYMBOL(ceph_osdc_notify_ack); 3716 3717 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 3718 u64 cookie, u32 prot_ver, u32 timeout, 3719 void *payload, size_t payload_len) 3720 { 3721 struct ceph_osd_req_op *op; 3722 struct ceph_pagelist *pl; 3723 int ret; 3724 3725 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 3726 op->notify.cookie = cookie; 3727 3728 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3729 if (!pl) 3730 return -ENOMEM; 3731 3732 ceph_pagelist_init(pl); 3733 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 3734 ret |= ceph_pagelist_encode_32(pl, timeout); 3735 ret |= ceph_pagelist_encode_32(pl, payload_len); 3736 ret |= ceph_pagelist_append(pl, payload, payload_len); 3737 if (ret) { 3738 ceph_pagelist_release(pl); 3739 return -ENOMEM; 3740 } 3741 3742 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 3743 op->indata_len = pl->length; 3744 return 0; 3745 } 3746 3747 /* 3748 * @timeout: in seconds 3749 * 3750 * @preply_{pages,len} are initialized both on success and error. 3751 * The caller is responsible for: 3752 * 3753 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 3754 */ 3755 int ceph_osdc_notify(struct ceph_osd_client *osdc, 3756 struct ceph_object_id *oid, 3757 struct ceph_object_locator *oloc, 3758 void *payload, 3759 size_t payload_len, 3760 u32 timeout, 3761 struct page ***preply_pages, 3762 size_t *preply_len) 3763 { 3764 struct ceph_osd_linger_request *lreq; 3765 struct page **pages; 3766 int ret; 3767 3768 WARN_ON(!timeout); 3769 if (preply_pages) { 3770 *preply_pages = NULL; 3771 *preply_len = 0; 3772 } 3773 3774 lreq = linger_alloc(osdc); 3775 if (!lreq) 3776 return -ENOMEM; 3777 3778 lreq->preply_pages = preply_pages; 3779 lreq->preply_len = preply_len; 3780 3781 ceph_oid_copy(&lreq->t.base_oid, oid); 3782 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3783 lreq->t.flags = CEPH_OSD_FLAG_READ; 3784 3785 lreq->reg_req = alloc_linger_request(lreq); 3786 if (!lreq->reg_req) { 3787 ret = -ENOMEM; 3788 goto out_put_lreq; 3789 } 3790 3791 /* for notify_id */ 3792 pages = ceph_alloc_page_vector(1, GFP_NOIO); 3793 if (IS_ERR(pages)) { 3794 ret = PTR_ERR(pages); 3795 goto out_put_lreq; 3796 } 3797 3798 down_write(&osdc->lock); 3799 linger_register(lreq); /* before osd_req_op_* */ 3800 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1, 3801 timeout, payload, payload_len); 3802 if (ret) { 3803 linger_unregister(lreq); 3804 up_write(&osdc->lock); 3805 ceph_release_page_vector(pages, 1); 3806 goto out_put_lreq; 3807 } 3808 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 3809 response_data), 3810 pages, PAGE_SIZE, 0, false, true); 3811 linger_submit(lreq); 3812 up_write(&osdc->lock); 3813 3814 ret = linger_reg_commit_wait(lreq); 3815 if (!ret) 3816 ret = linger_notify_finish_wait(lreq); 3817 else 3818 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 3819 3820 linger_cancel(lreq); 3821 out_put_lreq: 3822 linger_put(lreq); 3823 return ret; 3824 } 3825 EXPORT_SYMBOL(ceph_osdc_notify); 3826 3827 /* 3828 * Return the number of milliseconds since the watch was last 3829 * confirmed, or an error. If there is an error, the watch is no 3830 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 3831 */ 3832 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 3833 struct ceph_osd_linger_request *lreq) 3834 { 3835 unsigned long stamp, age; 3836 int ret; 3837 3838 down_read(&osdc->lock); 3839 mutex_lock(&lreq->lock); 3840 stamp = lreq->watch_valid_thru; 3841 if (!list_empty(&lreq->pending_lworks)) { 3842 struct linger_work *lwork = 3843 list_first_entry(&lreq->pending_lworks, 3844 struct linger_work, 3845 pending_item); 3846 3847 if (time_before(lwork->queued_stamp, stamp)) 3848 stamp = lwork->queued_stamp; 3849 } 3850 age = jiffies - stamp; 3851 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 3852 lreq, lreq->linger_id, age, lreq->last_error); 3853 /* we are truncating to msecs, so return a safe upper bound */ 3854 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 3855 3856 mutex_unlock(&lreq->lock); 3857 up_read(&osdc->lock); 3858 return ret; 3859 } 3860 3861 /* 3862 * Call all pending notify callbacks - for use after a watch is 3863 * unregistered, to make sure no more callbacks for it will be invoked 3864 */ 3865 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 3866 { 3867 flush_workqueue(osdc->notify_wq); 3868 } 3869 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 3870 3871 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 3872 { 3873 down_read(&osdc->lock); 3874 maybe_request_map(osdc); 3875 up_read(&osdc->lock); 3876 } 3877 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 3878 3879 /* 3880 * init, shutdown 3881 */ 3882 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 3883 { 3884 int err; 3885 3886 dout("init\n"); 3887 osdc->client = client; 3888 init_rwsem(&osdc->lock); 3889 osdc->osds = RB_ROOT; 3890 INIT_LIST_HEAD(&osdc->osd_lru); 3891 spin_lock_init(&osdc->osd_lru_lock); 3892 osd_init(&osdc->homeless_osd); 3893 osdc->homeless_osd.o_osdc = osdc; 3894 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 3895 osdc->linger_requests = RB_ROOT; 3896 osdc->map_checks = RB_ROOT; 3897 osdc->linger_map_checks = RB_ROOT; 3898 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 3899 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 3900 3901 err = -ENOMEM; 3902 osdc->osdmap = ceph_osdmap_alloc(); 3903 if (!osdc->osdmap) 3904 goto out; 3905 3906 osdc->req_mempool = mempool_create_slab_pool(10, 3907 ceph_osd_request_cache); 3908 if (!osdc->req_mempool) 3909 goto out_map; 3910 3911 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 3912 PAGE_SIZE, 10, true, "osd_op"); 3913 if (err < 0) 3914 goto out_mempool; 3915 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 3916 PAGE_SIZE, 10, true, "osd_op_reply"); 3917 if (err < 0) 3918 goto out_msgpool; 3919 3920 err = -ENOMEM; 3921 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 3922 if (!osdc->notify_wq) 3923 goto out_msgpool_reply; 3924 3925 schedule_delayed_work(&osdc->timeout_work, 3926 osdc->client->options->osd_keepalive_timeout); 3927 schedule_delayed_work(&osdc->osds_timeout_work, 3928 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 3929 3930 return 0; 3931 3932 out_msgpool_reply: 3933 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 3934 out_msgpool: 3935 ceph_msgpool_destroy(&osdc->msgpool_op); 3936 out_mempool: 3937 mempool_destroy(osdc->req_mempool); 3938 out_map: 3939 ceph_osdmap_destroy(osdc->osdmap); 3940 out: 3941 return err; 3942 } 3943 3944 void ceph_osdc_stop(struct ceph_osd_client *osdc) 3945 { 3946 flush_workqueue(osdc->notify_wq); 3947 destroy_workqueue(osdc->notify_wq); 3948 cancel_delayed_work_sync(&osdc->timeout_work); 3949 cancel_delayed_work_sync(&osdc->osds_timeout_work); 3950 3951 down_write(&osdc->lock); 3952 while (!RB_EMPTY_ROOT(&osdc->osds)) { 3953 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 3954 struct ceph_osd, o_node); 3955 close_osd(osd); 3956 } 3957 up_write(&osdc->lock); 3958 WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1); 3959 osd_cleanup(&osdc->homeless_osd); 3960 3961 WARN_ON(!list_empty(&osdc->osd_lru)); 3962 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 3963 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 3964 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 3965 WARN_ON(atomic_read(&osdc->num_requests)); 3966 WARN_ON(atomic_read(&osdc->num_homeless)); 3967 3968 ceph_osdmap_destroy(osdc->osdmap); 3969 mempool_destroy(osdc->req_mempool); 3970 ceph_msgpool_destroy(&osdc->msgpool_op); 3971 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 3972 } 3973 3974 /* 3975 * Read some contiguous pages. If we cross a stripe boundary, shorten 3976 * *plen. Return number of bytes read, or error. 3977 */ 3978 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 3979 struct ceph_vino vino, struct ceph_file_layout *layout, 3980 u64 off, u64 *plen, 3981 u32 truncate_seq, u64 truncate_size, 3982 struct page **pages, int num_pages, int page_align) 3983 { 3984 struct ceph_osd_request *req; 3985 int rc = 0; 3986 3987 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 3988 vino.snap, off, *plen); 3989 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 3990 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 3991 NULL, truncate_seq, truncate_size, 3992 false); 3993 if (IS_ERR(req)) 3994 return PTR_ERR(req); 3995 3996 /* it may be a short read due to an object boundary */ 3997 osd_req_op_extent_osd_data_pages(req, 0, 3998 pages, *plen, page_align, false, false); 3999 4000 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 4001 off, *plen, *plen, page_align); 4002 4003 rc = ceph_osdc_start_request(osdc, req, false); 4004 if (!rc) 4005 rc = ceph_osdc_wait_request(osdc, req); 4006 4007 ceph_osdc_put_request(req); 4008 dout("readpages result %d\n", rc); 4009 return rc; 4010 } 4011 EXPORT_SYMBOL(ceph_osdc_readpages); 4012 4013 /* 4014 * do a synchronous write on N pages 4015 */ 4016 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 4017 struct ceph_file_layout *layout, 4018 struct ceph_snap_context *snapc, 4019 u64 off, u64 len, 4020 u32 truncate_seq, u64 truncate_size, 4021 struct timespec *mtime, 4022 struct page **pages, int num_pages) 4023 { 4024 struct ceph_osd_request *req; 4025 int rc = 0; 4026 int page_align = off & ~PAGE_MASK; 4027 4028 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 4029 CEPH_OSD_OP_WRITE, 4030 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 4031 snapc, truncate_seq, truncate_size, 4032 true); 4033 if (IS_ERR(req)) 4034 return PTR_ERR(req); 4035 4036 /* it may be a short write due to an object boundary */ 4037 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 4038 false, false); 4039 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 4040 4041 req->r_mtime = *mtime; 4042 rc = ceph_osdc_start_request(osdc, req, true); 4043 if (!rc) 4044 rc = ceph_osdc_wait_request(osdc, req); 4045 4046 ceph_osdc_put_request(req); 4047 if (rc == 0) 4048 rc = len; 4049 dout("writepages result %d\n", rc); 4050 return rc; 4051 } 4052 EXPORT_SYMBOL(ceph_osdc_writepages); 4053 4054 int ceph_osdc_setup(void) 4055 { 4056 size_t size = sizeof(struct ceph_osd_request) + 4057 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 4058 4059 BUG_ON(ceph_osd_request_cache); 4060 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 4061 0, 0, NULL); 4062 4063 return ceph_osd_request_cache ? 0 : -ENOMEM; 4064 } 4065 EXPORT_SYMBOL(ceph_osdc_setup); 4066 4067 void ceph_osdc_cleanup(void) 4068 { 4069 BUG_ON(!ceph_osd_request_cache); 4070 kmem_cache_destroy(ceph_osd_request_cache); 4071 ceph_osd_request_cache = NULL; 4072 } 4073 EXPORT_SYMBOL(ceph_osdc_cleanup); 4074 4075 /* 4076 * handle incoming message 4077 */ 4078 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 4079 { 4080 struct ceph_osd *osd = con->private; 4081 struct ceph_osd_client *osdc = osd->o_osdc; 4082 int type = le16_to_cpu(msg->hdr.type); 4083 4084 switch (type) { 4085 case CEPH_MSG_OSD_MAP: 4086 ceph_osdc_handle_map(osdc, msg); 4087 break; 4088 case CEPH_MSG_OSD_OPREPLY: 4089 handle_reply(osd, msg); 4090 break; 4091 case CEPH_MSG_WATCH_NOTIFY: 4092 handle_watch_notify(osdc, msg); 4093 break; 4094 4095 default: 4096 pr_err("received unknown message type %d %s\n", type, 4097 ceph_msg_type_name(type)); 4098 } 4099 4100 ceph_msg_put(msg); 4101 } 4102 4103 /* 4104 * Lookup and return message for incoming reply. Don't try to do 4105 * anything about a larger than preallocated data portion of the 4106 * message at the moment - for now, just skip the message. 4107 */ 4108 static struct ceph_msg *get_reply(struct ceph_connection *con, 4109 struct ceph_msg_header *hdr, 4110 int *skip) 4111 { 4112 struct ceph_osd *osd = con->private; 4113 struct ceph_osd_client *osdc = osd->o_osdc; 4114 struct ceph_msg *m = NULL; 4115 struct ceph_osd_request *req; 4116 int front_len = le32_to_cpu(hdr->front_len); 4117 int data_len = le32_to_cpu(hdr->data_len); 4118 u64 tid = le64_to_cpu(hdr->tid); 4119 4120 down_read(&osdc->lock); 4121 if (!osd_registered(osd)) { 4122 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 4123 *skip = 1; 4124 goto out_unlock_osdc; 4125 } 4126 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 4127 4128 mutex_lock(&osd->lock); 4129 req = lookup_request(&osd->o_requests, tid); 4130 if (!req) { 4131 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 4132 osd->o_osd, tid); 4133 *skip = 1; 4134 goto out_unlock_session; 4135 } 4136 4137 ceph_msg_revoke_incoming(req->r_reply); 4138 4139 if (front_len > req->r_reply->front_alloc_len) { 4140 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 4141 __func__, osd->o_osd, req->r_tid, front_len, 4142 req->r_reply->front_alloc_len); 4143 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 4144 false); 4145 if (!m) 4146 goto out_unlock_session; 4147 ceph_msg_put(req->r_reply); 4148 req->r_reply = m; 4149 } 4150 4151 if (data_len > req->r_reply->data_length) { 4152 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 4153 __func__, osd->o_osd, req->r_tid, data_len, 4154 req->r_reply->data_length); 4155 m = NULL; 4156 *skip = 1; 4157 goto out_unlock_session; 4158 } 4159 4160 m = ceph_msg_get(req->r_reply); 4161 dout("get_reply tid %lld %p\n", tid, m); 4162 4163 out_unlock_session: 4164 mutex_unlock(&osd->lock); 4165 out_unlock_osdc: 4166 up_read(&osdc->lock); 4167 return m; 4168 } 4169 4170 /* 4171 * TODO: switch to a msg-owned pagelist 4172 */ 4173 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 4174 { 4175 struct ceph_msg *m; 4176 int type = le16_to_cpu(hdr->type); 4177 u32 front_len = le32_to_cpu(hdr->front_len); 4178 u32 data_len = le32_to_cpu(hdr->data_len); 4179 4180 m = ceph_msg_new(type, front_len, GFP_NOIO, false); 4181 if (!m) 4182 return NULL; 4183 4184 if (data_len) { 4185 struct page **pages; 4186 struct ceph_osd_data osd_data; 4187 4188 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 4189 GFP_NOIO); 4190 if (!pages) { 4191 ceph_msg_put(m); 4192 return NULL; 4193 } 4194 4195 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false, 4196 false); 4197 ceph_osdc_msg_data_add(m, &osd_data); 4198 } 4199 4200 return m; 4201 } 4202 4203 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 4204 struct ceph_msg_header *hdr, 4205 int *skip) 4206 { 4207 struct ceph_osd *osd = con->private; 4208 int type = le16_to_cpu(hdr->type); 4209 4210 *skip = 0; 4211 switch (type) { 4212 case CEPH_MSG_OSD_MAP: 4213 case CEPH_MSG_WATCH_NOTIFY: 4214 return alloc_msg_with_page_vector(hdr); 4215 case CEPH_MSG_OSD_OPREPLY: 4216 return get_reply(con, hdr, skip); 4217 default: 4218 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 4219 osd->o_osd, type); 4220 *skip = 1; 4221 return NULL; 4222 } 4223 } 4224 4225 /* 4226 * Wrappers to refcount containing ceph_osd struct 4227 */ 4228 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 4229 { 4230 struct ceph_osd *osd = con->private; 4231 if (get_osd(osd)) 4232 return con; 4233 return NULL; 4234 } 4235 4236 static void put_osd_con(struct ceph_connection *con) 4237 { 4238 struct ceph_osd *osd = con->private; 4239 put_osd(osd); 4240 } 4241 4242 /* 4243 * authentication 4244 */ 4245 /* 4246 * Note: returned pointer is the address of a structure that's 4247 * managed separately. Caller must *not* attempt to free it. 4248 */ 4249 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 4250 int *proto, int force_new) 4251 { 4252 struct ceph_osd *o = con->private; 4253 struct ceph_osd_client *osdc = o->o_osdc; 4254 struct ceph_auth_client *ac = osdc->client->monc.auth; 4255 struct ceph_auth_handshake *auth = &o->o_auth; 4256 4257 if (force_new && auth->authorizer) { 4258 ceph_auth_destroy_authorizer(auth->authorizer); 4259 auth->authorizer = NULL; 4260 } 4261 if (!auth->authorizer) { 4262 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4263 auth); 4264 if (ret) 4265 return ERR_PTR(ret); 4266 } else { 4267 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4268 auth); 4269 if (ret) 4270 return ERR_PTR(ret); 4271 } 4272 *proto = ac->protocol; 4273 4274 return auth; 4275 } 4276 4277 4278 static int verify_authorizer_reply(struct ceph_connection *con, int len) 4279 { 4280 struct ceph_osd *o = con->private; 4281 struct ceph_osd_client *osdc = o->o_osdc; 4282 struct ceph_auth_client *ac = osdc->client->monc.auth; 4283 4284 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); 4285 } 4286 4287 static int invalidate_authorizer(struct ceph_connection *con) 4288 { 4289 struct ceph_osd *o = con->private; 4290 struct ceph_osd_client *osdc = o->o_osdc; 4291 struct ceph_auth_client *ac = osdc->client->monc.auth; 4292 4293 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 4294 return ceph_monc_validate_auth(&osdc->client->monc); 4295 } 4296 4297 static int osd_sign_message(struct ceph_msg *msg) 4298 { 4299 struct ceph_osd *o = msg->con->private; 4300 struct ceph_auth_handshake *auth = &o->o_auth; 4301 4302 return ceph_auth_sign_message(auth, msg); 4303 } 4304 4305 static int osd_check_message_signature(struct ceph_msg *msg) 4306 { 4307 struct ceph_osd *o = msg->con->private; 4308 struct ceph_auth_handshake *auth = &o->o_auth; 4309 4310 return ceph_auth_check_message_signature(auth, msg); 4311 } 4312 4313 static const struct ceph_connection_operations osd_con_ops = { 4314 .get = get_osd_con, 4315 .put = put_osd_con, 4316 .dispatch = dispatch, 4317 .get_authorizer = get_authorizer, 4318 .verify_authorizer_reply = verify_authorizer_reply, 4319 .invalidate_authorizer = invalidate_authorizer, 4320 .alloc_msg = alloc_msg, 4321 .sign_message = osd_sign_message, 4322 .check_message_signature = osd_check_message_signature, 4323 .fault = osd_fault, 4324 }; 4325