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->osdmap, CEPH_OSDMAP_PAUSERD); 1280 bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || 1281 ceph_osdmap_flag(osdc->osdmap, 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->osdmap, 1307 CEPH_OSDMAP_SORTBITWISE); 1308 enum calc_target_result ct_res; 1309 int ret; 1310 1311 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1312 if (!pi) { 1313 t->osd = CEPH_HOMELESS_OSD; 1314 ct_res = CALC_TARGET_POOL_DNE; 1315 goto out; 1316 } 1317 1318 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1319 if (last_force_resend && 1320 *last_force_resend < pi->last_force_request_resend) { 1321 *last_force_resend = pi->last_force_request_resend; 1322 force_resend = true; 1323 } else if (!last_force_resend) { 1324 force_resend = true; 1325 } 1326 } 1327 if (ceph_oid_empty(&t->target_oid) || force_resend) { 1328 ceph_oid_copy(&t->target_oid, &t->base_oid); 1329 need_check_tiering = true; 1330 } 1331 if (ceph_oloc_empty(&t->target_oloc) || force_resend) { 1332 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1333 need_check_tiering = true; 1334 } 1335 1336 if (need_check_tiering && 1337 (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1338 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) 1339 t->target_oloc.pool = pi->read_tier; 1340 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) 1341 t->target_oloc.pool = pi->write_tier; 1342 } 1343 1344 ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid, 1345 &t->target_oloc, &pgid); 1346 if (ret) { 1347 WARN_ON(ret != -ENOENT); 1348 t->osd = CEPH_HOMELESS_OSD; 1349 ct_res = CALC_TARGET_POOL_DNE; 1350 goto out; 1351 } 1352 last_pgid.pool = pgid.pool; 1353 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1354 1355 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting); 1356 if (any_change && 1357 ceph_is_new_interval(&t->acting, 1358 &acting, 1359 &t->up, 1360 &up, 1361 t->size, 1362 pi->size, 1363 t->min_size, 1364 pi->min_size, 1365 t->pg_num, 1366 pi->pg_num, 1367 t->sort_bitwise, 1368 sort_bitwise, 1369 &last_pgid)) 1370 force_resend = true; 1371 1372 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1373 t->paused = false; 1374 need_resend = true; 1375 } 1376 1377 if (ceph_pg_compare(&t->pgid, &pgid) || 1378 ceph_osds_changed(&t->acting, &acting, any_change) || 1379 force_resend) { 1380 t->pgid = pgid; /* struct */ 1381 ceph_osds_copy(&t->acting, &acting); 1382 ceph_osds_copy(&t->up, &up); 1383 t->size = pi->size; 1384 t->min_size = pi->min_size; 1385 t->pg_num = pi->pg_num; 1386 t->pg_num_mask = pi->pg_num_mask; 1387 t->sort_bitwise = sort_bitwise; 1388 1389 t->osd = acting.primary; 1390 need_resend = true; 1391 } 1392 1393 ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION; 1394 out: 1395 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd); 1396 return ct_res; 1397 } 1398 1399 static void setup_request_data(struct ceph_osd_request *req, 1400 struct ceph_msg *msg) 1401 { 1402 u32 data_len = 0; 1403 int i; 1404 1405 if (!list_empty(&msg->data)) 1406 return; 1407 1408 WARN_ON(msg->data_length); 1409 for (i = 0; i < req->r_num_ops; i++) { 1410 struct ceph_osd_req_op *op = &req->r_ops[i]; 1411 1412 switch (op->op) { 1413 /* request */ 1414 case CEPH_OSD_OP_WRITE: 1415 case CEPH_OSD_OP_WRITEFULL: 1416 WARN_ON(op->indata_len != op->extent.length); 1417 ceph_osdc_msg_data_add(msg, &op->extent.osd_data); 1418 break; 1419 case CEPH_OSD_OP_SETXATTR: 1420 case CEPH_OSD_OP_CMPXATTR: 1421 WARN_ON(op->indata_len != op->xattr.name_len + 1422 op->xattr.value_len); 1423 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data); 1424 break; 1425 case CEPH_OSD_OP_NOTIFY_ACK: 1426 ceph_osdc_msg_data_add(msg, 1427 &op->notify_ack.request_data); 1428 break; 1429 1430 /* reply */ 1431 case CEPH_OSD_OP_STAT: 1432 ceph_osdc_msg_data_add(req->r_reply, 1433 &op->raw_data_in); 1434 break; 1435 case CEPH_OSD_OP_READ: 1436 ceph_osdc_msg_data_add(req->r_reply, 1437 &op->extent.osd_data); 1438 break; 1439 1440 /* both */ 1441 case CEPH_OSD_OP_CALL: 1442 WARN_ON(op->indata_len != op->cls.class_len + 1443 op->cls.method_len + 1444 op->cls.indata_len); 1445 ceph_osdc_msg_data_add(msg, &op->cls.request_info); 1446 /* optional, can be NONE */ 1447 ceph_osdc_msg_data_add(msg, &op->cls.request_data); 1448 /* optional, can be NONE */ 1449 ceph_osdc_msg_data_add(req->r_reply, 1450 &op->cls.response_data); 1451 break; 1452 case CEPH_OSD_OP_NOTIFY: 1453 ceph_osdc_msg_data_add(msg, 1454 &op->notify.request_data); 1455 ceph_osdc_msg_data_add(req->r_reply, 1456 &op->notify.response_data); 1457 break; 1458 } 1459 1460 data_len += op->indata_len; 1461 } 1462 1463 WARN_ON(data_len != msg->data_length); 1464 } 1465 1466 static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg) 1467 { 1468 void *p = msg->front.iov_base; 1469 void *const end = p + msg->front_alloc_len; 1470 u32 data_len = 0; 1471 int i; 1472 1473 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 1474 /* snapshots aren't writeable */ 1475 WARN_ON(req->r_snapid != CEPH_NOSNAP); 1476 } else { 1477 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 1478 req->r_data_offset || req->r_snapc); 1479 } 1480 1481 setup_request_data(req, msg); 1482 1483 ceph_encode_32(&p, 1); /* client_inc, always 1 */ 1484 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 1485 ceph_encode_32(&p, req->r_flags); 1486 ceph_encode_timespec(p, &req->r_mtime); 1487 p += sizeof(struct ceph_timespec); 1488 /* aka reassert_version */ 1489 memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version)); 1490 p += sizeof(req->r_replay_version); 1491 1492 /* oloc */ 1493 ceph_encode_8(&p, 4); 1494 ceph_encode_8(&p, 4); 1495 ceph_encode_32(&p, 8 + 4 + 4); 1496 ceph_encode_64(&p, req->r_t.target_oloc.pool); 1497 ceph_encode_32(&p, -1); /* preferred */ 1498 ceph_encode_32(&p, 0); /* key len */ 1499 1500 /* pgid */ 1501 ceph_encode_8(&p, 1); 1502 ceph_encode_64(&p, req->r_t.pgid.pool); 1503 ceph_encode_32(&p, req->r_t.pgid.seed); 1504 ceph_encode_32(&p, -1); /* preferred */ 1505 1506 /* oid */ 1507 ceph_encode_32(&p, req->r_t.target_oid.name_len); 1508 memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len); 1509 p += req->r_t.target_oid.name_len; 1510 1511 /* ops, can imply data */ 1512 ceph_encode_16(&p, req->r_num_ops); 1513 for (i = 0; i < req->r_num_ops; i++) { 1514 data_len += osd_req_encode_op(p, &req->r_ops[i]); 1515 p += sizeof(struct ceph_osd_op); 1516 } 1517 1518 ceph_encode_64(&p, req->r_snapid); /* snapid */ 1519 if (req->r_snapc) { 1520 ceph_encode_64(&p, req->r_snapc->seq); 1521 ceph_encode_32(&p, req->r_snapc->num_snaps); 1522 for (i = 0; i < req->r_snapc->num_snaps; i++) 1523 ceph_encode_64(&p, req->r_snapc->snaps[i]); 1524 } else { 1525 ceph_encode_64(&p, 0); /* snap_seq */ 1526 ceph_encode_32(&p, 0); /* snaps len */ 1527 } 1528 1529 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 1530 1531 BUG_ON(p > end); 1532 msg->front.iov_len = p - msg->front.iov_base; 1533 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 1534 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 1535 msg->hdr.data_len = cpu_to_le32(data_len); 1536 /* 1537 * The header "data_off" is a hint to the receiver allowing it 1538 * to align received data into its buffers such that there's no 1539 * need to re-copy it before writing it to disk (direct I/O). 1540 */ 1541 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 1542 1543 dout("%s req %p oid %*pE oid_len %d front %zu data %u\n", __func__, 1544 req, req->r_t.target_oid.name_len, req->r_t.target_oid.name, 1545 req->r_t.target_oid.name_len, msg->front.iov_len, data_len); 1546 } 1547 1548 /* 1549 * @req has to be assigned a tid and registered. 1550 */ 1551 static void send_request(struct ceph_osd_request *req) 1552 { 1553 struct ceph_osd *osd = req->r_osd; 1554 1555 verify_osd_locked(osd); 1556 WARN_ON(osd->o_osd != req->r_t.osd); 1557 1558 /* 1559 * We may have a previously queued request message hanging 1560 * around. Cancel it to avoid corrupting the msgr. 1561 */ 1562 if (req->r_sent) 1563 ceph_msg_revoke(req->r_request); 1564 1565 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 1566 if (req->r_attempts) 1567 req->r_flags |= CEPH_OSD_FLAG_RETRY; 1568 else 1569 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 1570 1571 encode_request(req, req->r_request); 1572 1573 dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n", 1574 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 1575 req->r_t.osd, req->r_flags, req->r_attempts); 1576 1577 req->r_t.paused = false; 1578 req->r_stamp = jiffies; 1579 req->r_attempts++; 1580 1581 req->r_sent = osd->o_incarnation; 1582 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 1583 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 1584 } 1585 1586 static void maybe_request_map(struct ceph_osd_client *osdc) 1587 { 1588 bool continuous = false; 1589 1590 verify_osdc_locked(osdc); 1591 WARN_ON(!osdc->osdmap->epoch); 1592 1593 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 1594 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) || 1595 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) { 1596 dout("%s osdc %p continuous\n", __func__, osdc); 1597 continuous = true; 1598 } else { 1599 dout("%s osdc %p onetime\n", __func__, osdc); 1600 } 1601 1602 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 1603 osdc->osdmap->epoch + 1, continuous)) 1604 ceph_monc_renew_subs(&osdc->client->monc); 1605 } 1606 1607 static void send_map_check(struct ceph_osd_request *req); 1608 1609 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 1610 { 1611 struct ceph_osd_client *osdc = req->r_osdc; 1612 struct ceph_osd *osd; 1613 enum calc_target_result ct_res; 1614 bool need_send = false; 1615 bool promoted = false; 1616 1617 WARN_ON(req->r_tid || req->r_got_reply); 1618 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 1619 1620 again: 1621 ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, false); 1622 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 1623 goto promote; 1624 1625 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 1626 if (IS_ERR(osd)) { 1627 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 1628 goto promote; 1629 } 1630 1631 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1632 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) { 1633 dout("req %p pausewr\n", req); 1634 req->r_t.paused = true; 1635 maybe_request_map(osdc); 1636 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1637 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD)) { 1638 dout("req %p pauserd\n", req); 1639 req->r_t.paused = true; 1640 maybe_request_map(osdc); 1641 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1642 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 1643 CEPH_OSD_FLAG_FULL_FORCE)) && 1644 (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 1645 pool_full(osdc, req->r_t.base_oloc.pool))) { 1646 dout("req %p full/pool_full\n", req); 1647 pr_warn_ratelimited("FULL or reached pool quota\n"); 1648 req->r_t.paused = true; 1649 maybe_request_map(osdc); 1650 } else if (!osd_homeless(osd)) { 1651 need_send = true; 1652 } else { 1653 maybe_request_map(osdc); 1654 } 1655 1656 mutex_lock(&osd->lock); 1657 /* 1658 * Assign the tid atomically with send_request() to protect 1659 * multiple writes to the same object from racing with each 1660 * other, resulting in out of order ops on the OSDs. 1661 */ 1662 req->r_tid = atomic64_inc_return(&osdc->last_tid); 1663 link_request(osd, req); 1664 if (need_send) 1665 send_request(req); 1666 mutex_unlock(&osd->lock); 1667 1668 if (ct_res == CALC_TARGET_POOL_DNE) 1669 send_map_check(req); 1670 1671 if (promoted) 1672 downgrade_write(&osdc->lock); 1673 return; 1674 1675 promote: 1676 up_read(&osdc->lock); 1677 down_write(&osdc->lock); 1678 wrlocked = true; 1679 promoted = true; 1680 goto again; 1681 } 1682 1683 static void account_request(struct ceph_osd_request *req) 1684 { 1685 unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK; 1686 1687 if (req->r_flags & CEPH_OSD_FLAG_READ) { 1688 WARN_ON(req->r_flags & mask); 1689 req->r_flags |= CEPH_OSD_FLAG_ACK; 1690 } else if (req->r_flags & CEPH_OSD_FLAG_WRITE) 1691 WARN_ON(!(req->r_flags & mask)); 1692 else 1693 WARN_ON(1); 1694 1695 WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask); 1696 atomic_inc(&req->r_osdc->num_requests); 1697 } 1698 1699 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 1700 { 1701 ceph_osdc_get_request(req); 1702 account_request(req); 1703 __submit_request(req, wrlocked); 1704 } 1705 1706 static void __finish_request(struct ceph_osd_request *req) 1707 { 1708 struct ceph_osd_client *osdc = req->r_osdc; 1709 struct ceph_osd *osd = req->r_osd; 1710 1711 verify_osd_locked(osd); 1712 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1713 1714 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 1715 unlink_request(osd, req); 1716 atomic_dec(&osdc->num_requests); 1717 1718 /* 1719 * If an OSD has failed or returned and a request has been sent 1720 * twice, it's possible to get a reply and end up here while the 1721 * request message is queued for delivery. We will ignore the 1722 * reply, so not a big deal, but better to try and catch it. 1723 */ 1724 ceph_msg_revoke(req->r_request); 1725 ceph_msg_revoke_incoming(req->r_reply); 1726 } 1727 1728 static void finish_request(struct ceph_osd_request *req) 1729 { 1730 __finish_request(req); 1731 ceph_osdc_put_request(req); 1732 } 1733 1734 static void __complete_request(struct ceph_osd_request *req) 1735 { 1736 if (req->r_callback) 1737 req->r_callback(req); 1738 else 1739 complete_all(&req->r_completion); 1740 } 1741 1742 /* 1743 * Note that this is open-coded in handle_reply(), which has to deal 1744 * with ack vs commit, dup acks, etc. 1745 */ 1746 static void complete_request(struct ceph_osd_request *req, int err) 1747 { 1748 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 1749 1750 req->r_result = err; 1751 __finish_request(req); 1752 __complete_request(req); 1753 complete_all(&req->r_safe_completion); 1754 ceph_osdc_put_request(req); 1755 } 1756 1757 static void cancel_map_check(struct ceph_osd_request *req) 1758 { 1759 struct ceph_osd_client *osdc = req->r_osdc; 1760 struct ceph_osd_request *lookup_req; 1761 1762 verify_osdc_wrlocked(osdc); 1763 1764 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1765 if (!lookup_req) 1766 return; 1767 1768 WARN_ON(lookup_req != req); 1769 erase_request_mc(&osdc->map_checks, req); 1770 ceph_osdc_put_request(req); 1771 } 1772 1773 static void cancel_request(struct ceph_osd_request *req) 1774 { 1775 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1776 1777 cancel_map_check(req); 1778 finish_request(req); 1779 } 1780 1781 static void check_pool_dne(struct ceph_osd_request *req) 1782 { 1783 struct ceph_osd_client *osdc = req->r_osdc; 1784 struct ceph_osdmap *map = osdc->osdmap; 1785 1786 verify_osdc_wrlocked(osdc); 1787 WARN_ON(!map->epoch); 1788 1789 if (req->r_attempts) { 1790 /* 1791 * We sent a request earlier, which means that 1792 * previously the pool existed, and now it does not 1793 * (i.e., it was deleted). 1794 */ 1795 req->r_map_dne_bound = map->epoch; 1796 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 1797 req->r_tid); 1798 } else { 1799 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 1800 req, req->r_tid, req->r_map_dne_bound, map->epoch); 1801 } 1802 1803 if (req->r_map_dne_bound) { 1804 if (map->epoch >= req->r_map_dne_bound) { 1805 /* we had a new enough map */ 1806 pr_info_ratelimited("tid %llu pool does not exist\n", 1807 req->r_tid); 1808 complete_request(req, -ENOENT); 1809 } 1810 } else { 1811 send_map_check(req); 1812 } 1813 } 1814 1815 static void map_check_cb(struct ceph_mon_generic_request *greq) 1816 { 1817 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 1818 struct ceph_osd_request *req; 1819 u64 tid = greq->private_data; 1820 1821 WARN_ON(greq->result || !greq->u.newest); 1822 1823 down_write(&osdc->lock); 1824 req = lookup_request_mc(&osdc->map_checks, tid); 1825 if (!req) { 1826 dout("%s tid %llu dne\n", __func__, tid); 1827 goto out_unlock; 1828 } 1829 1830 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 1831 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 1832 if (!req->r_map_dne_bound) 1833 req->r_map_dne_bound = greq->u.newest; 1834 erase_request_mc(&osdc->map_checks, req); 1835 check_pool_dne(req); 1836 1837 ceph_osdc_put_request(req); 1838 out_unlock: 1839 up_write(&osdc->lock); 1840 } 1841 1842 static void send_map_check(struct ceph_osd_request *req) 1843 { 1844 struct ceph_osd_client *osdc = req->r_osdc; 1845 struct ceph_osd_request *lookup_req; 1846 int ret; 1847 1848 verify_osdc_wrlocked(osdc); 1849 1850 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1851 if (lookup_req) { 1852 WARN_ON(lookup_req != req); 1853 return; 1854 } 1855 1856 ceph_osdc_get_request(req); 1857 insert_request_mc(&osdc->map_checks, req); 1858 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 1859 map_check_cb, req->r_tid); 1860 WARN_ON(ret); 1861 } 1862 1863 /* 1864 * lingering requests, watch/notify v2 infrastructure 1865 */ 1866 static void linger_release(struct kref *kref) 1867 { 1868 struct ceph_osd_linger_request *lreq = 1869 container_of(kref, struct ceph_osd_linger_request, kref); 1870 1871 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 1872 lreq->reg_req, lreq->ping_req); 1873 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 1874 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 1875 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 1876 WARN_ON(!list_empty(&lreq->scan_item)); 1877 WARN_ON(!list_empty(&lreq->pending_lworks)); 1878 WARN_ON(lreq->osd); 1879 1880 if (lreq->reg_req) 1881 ceph_osdc_put_request(lreq->reg_req); 1882 if (lreq->ping_req) 1883 ceph_osdc_put_request(lreq->ping_req); 1884 target_destroy(&lreq->t); 1885 kfree(lreq); 1886 } 1887 1888 static void linger_put(struct ceph_osd_linger_request *lreq) 1889 { 1890 if (lreq) 1891 kref_put(&lreq->kref, linger_release); 1892 } 1893 1894 static struct ceph_osd_linger_request * 1895 linger_get(struct ceph_osd_linger_request *lreq) 1896 { 1897 kref_get(&lreq->kref); 1898 return lreq; 1899 } 1900 1901 static struct ceph_osd_linger_request * 1902 linger_alloc(struct ceph_osd_client *osdc) 1903 { 1904 struct ceph_osd_linger_request *lreq; 1905 1906 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 1907 if (!lreq) 1908 return NULL; 1909 1910 kref_init(&lreq->kref); 1911 mutex_init(&lreq->lock); 1912 RB_CLEAR_NODE(&lreq->node); 1913 RB_CLEAR_NODE(&lreq->osdc_node); 1914 RB_CLEAR_NODE(&lreq->mc_node); 1915 INIT_LIST_HEAD(&lreq->scan_item); 1916 INIT_LIST_HEAD(&lreq->pending_lworks); 1917 init_completion(&lreq->reg_commit_wait); 1918 init_completion(&lreq->notify_finish_wait); 1919 1920 lreq->osdc = osdc; 1921 target_init(&lreq->t); 1922 1923 dout("%s lreq %p\n", __func__, lreq); 1924 return lreq; 1925 } 1926 1927 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 1928 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 1929 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 1930 1931 /* 1932 * Create linger request <-> OSD session relation. 1933 * 1934 * @lreq has to be registered, @osd may be homeless. 1935 */ 1936 static void link_linger(struct ceph_osd *osd, 1937 struct ceph_osd_linger_request *lreq) 1938 { 1939 verify_osd_locked(osd); 1940 WARN_ON(!lreq->linger_id || lreq->osd); 1941 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1942 osd->o_osd, lreq, lreq->linger_id); 1943 1944 if (!osd_homeless(osd)) 1945 __remove_osd_from_lru(osd); 1946 else 1947 atomic_inc(&osd->o_osdc->num_homeless); 1948 1949 get_osd(osd); 1950 insert_linger(&osd->o_linger_requests, lreq); 1951 lreq->osd = osd; 1952 } 1953 1954 static void unlink_linger(struct ceph_osd *osd, 1955 struct ceph_osd_linger_request *lreq) 1956 { 1957 verify_osd_locked(osd); 1958 WARN_ON(lreq->osd != osd); 1959 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1960 osd->o_osd, lreq, lreq->linger_id); 1961 1962 lreq->osd = NULL; 1963 erase_linger(&osd->o_linger_requests, lreq); 1964 put_osd(osd); 1965 1966 if (!osd_homeless(osd)) 1967 maybe_move_osd_to_lru(osd); 1968 else 1969 atomic_dec(&osd->o_osdc->num_homeless); 1970 } 1971 1972 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 1973 { 1974 verify_osdc_locked(lreq->osdc); 1975 1976 return !RB_EMPTY_NODE(&lreq->osdc_node); 1977 } 1978 1979 static bool linger_registered(struct ceph_osd_linger_request *lreq) 1980 { 1981 struct ceph_osd_client *osdc = lreq->osdc; 1982 bool registered; 1983 1984 down_read(&osdc->lock); 1985 registered = __linger_registered(lreq); 1986 up_read(&osdc->lock); 1987 1988 return registered; 1989 } 1990 1991 static void linger_register(struct ceph_osd_linger_request *lreq) 1992 { 1993 struct ceph_osd_client *osdc = lreq->osdc; 1994 1995 verify_osdc_wrlocked(osdc); 1996 WARN_ON(lreq->linger_id); 1997 1998 linger_get(lreq); 1999 lreq->linger_id = ++osdc->last_linger_id; 2000 insert_linger_osdc(&osdc->linger_requests, lreq); 2001 } 2002 2003 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2004 { 2005 struct ceph_osd_client *osdc = lreq->osdc; 2006 2007 verify_osdc_wrlocked(osdc); 2008 2009 erase_linger_osdc(&osdc->linger_requests, lreq); 2010 linger_put(lreq); 2011 } 2012 2013 static void cancel_linger_request(struct ceph_osd_request *req) 2014 { 2015 struct ceph_osd_linger_request *lreq = req->r_priv; 2016 2017 WARN_ON(!req->r_linger); 2018 cancel_request(req); 2019 linger_put(lreq); 2020 } 2021 2022 struct linger_work { 2023 struct work_struct work; 2024 struct ceph_osd_linger_request *lreq; 2025 struct list_head pending_item; 2026 unsigned long queued_stamp; 2027 2028 union { 2029 struct { 2030 u64 notify_id; 2031 u64 notifier_id; 2032 void *payload; /* points into @msg front */ 2033 size_t payload_len; 2034 2035 struct ceph_msg *msg; /* for ceph_msg_put() */ 2036 } notify; 2037 struct { 2038 int err; 2039 } error; 2040 }; 2041 }; 2042 2043 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2044 work_func_t workfn) 2045 { 2046 struct linger_work *lwork; 2047 2048 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2049 if (!lwork) 2050 return NULL; 2051 2052 INIT_WORK(&lwork->work, workfn); 2053 INIT_LIST_HEAD(&lwork->pending_item); 2054 lwork->lreq = linger_get(lreq); 2055 2056 return lwork; 2057 } 2058 2059 static void lwork_free(struct linger_work *lwork) 2060 { 2061 struct ceph_osd_linger_request *lreq = lwork->lreq; 2062 2063 mutex_lock(&lreq->lock); 2064 list_del(&lwork->pending_item); 2065 mutex_unlock(&lreq->lock); 2066 2067 linger_put(lreq); 2068 kfree(lwork); 2069 } 2070 2071 static void lwork_queue(struct linger_work *lwork) 2072 { 2073 struct ceph_osd_linger_request *lreq = lwork->lreq; 2074 struct ceph_osd_client *osdc = lreq->osdc; 2075 2076 verify_lreq_locked(lreq); 2077 WARN_ON(!list_empty(&lwork->pending_item)); 2078 2079 lwork->queued_stamp = jiffies; 2080 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2081 queue_work(osdc->notify_wq, &lwork->work); 2082 } 2083 2084 static void do_watch_notify(struct work_struct *w) 2085 { 2086 struct linger_work *lwork = container_of(w, struct linger_work, work); 2087 struct ceph_osd_linger_request *lreq = lwork->lreq; 2088 2089 if (!linger_registered(lreq)) { 2090 dout("%s lreq %p not registered\n", __func__, lreq); 2091 goto out; 2092 } 2093 2094 WARN_ON(!lreq->is_watch); 2095 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2096 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2097 lwork->notify.payload_len); 2098 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2099 lwork->notify.notifier_id, lwork->notify.payload, 2100 lwork->notify.payload_len); 2101 2102 out: 2103 ceph_msg_put(lwork->notify.msg); 2104 lwork_free(lwork); 2105 } 2106 2107 static void do_watch_error(struct work_struct *w) 2108 { 2109 struct linger_work *lwork = container_of(w, struct linger_work, work); 2110 struct ceph_osd_linger_request *lreq = lwork->lreq; 2111 2112 if (!linger_registered(lreq)) { 2113 dout("%s lreq %p not registered\n", __func__, lreq); 2114 goto out; 2115 } 2116 2117 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2118 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2119 2120 out: 2121 lwork_free(lwork); 2122 } 2123 2124 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2125 { 2126 struct linger_work *lwork; 2127 2128 lwork = lwork_alloc(lreq, do_watch_error); 2129 if (!lwork) { 2130 pr_err("failed to allocate error-lwork\n"); 2131 return; 2132 } 2133 2134 lwork->error.err = lreq->last_error; 2135 lwork_queue(lwork); 2136 } 2137 2138 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2139 int result) 2140 { 2141 if (!completion_done(&lreq->reg_commit_wait)) { 2142 lreq->reg_commit_error = (result <= 0 ? result : 0); 2143 complete_all(&lreq->reg_commit_wait); 2144 } 2145 } 2146 2147 static void linger_commit_cb(struct ceph_osd_request *req) 2148 { 2149 struct ceph_osd_linger_request *lreq = req->r_priv; 2150 2151 mutex_lock(&lreq->lock); 2152 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2153 lreq->linger_id, req->r_result); 2154 WARN_ON(!__linger_registered(lreq)); 2155 linger_reg_commit_complete(lreq, req->r_result); 2156 lreq->committed = true; 2157 2158 if (!lreq->is_watch) { 2159 struct ceph_osd_data *osd_data = 2160 osd_req_op_data(req, 0, notify, response_data); 2161 void *p = page_address(osd_data->pages[0]); 2162 2163 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2164 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2165 2166 /* make note of the notify_id */ 2167 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2168 lreq->notify_id = ceph_decode_64(&p); 2169 dout("lreq %p notify_id %llu\n", lreq, 2170 lreq->notify_id); 2171 } else { 2172 dout("lreq %p no notify_id\n", lreq); 2173 } 2174 } 2175 2176 mutex_unlock(&lreq->lock); 2177 linger_put(lreq); 2178 } 2179 2180 static int normalize_watch_error(int err) 2181 { 2182 /* 2183 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2184 * notification and a failure to reconnect because we raced with 2185 * the delete appear the same to the user. 2186 */ 2187 if (err == -ENOENT) 2188 err = -ENOTCONN; 2189 2190 return err; 2191 } 2192 2193 static void linger_reconnect_cb(struct ceph_osd_request *req) 2194 { 2195 struct ceph_osd_linger_request *lreq = req->r_priv; 2196 2197 mutex_lock(&lreq->lock); 2198 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2199 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2200 if (req->r_result < 0) { 2201 if (!lreq->last_error) { 2202 lreq->last_error = normalize_watch_error(req->r_result); 2203 queue_watch_error(lreq); 2204 } 2205 } 2206 2207 mutex_unlock(&lreq->lock); 2208 linger_put(lreq); 2209 } 2210 2211 static void send_linger(struct ceph_osd_linger_request *lreq) 2212 { 2213 struct ceph_osd_request *req = lreq->reg_req; 2214 struct ceph_osd_req_op *op = &req->r_ops[0]; 2215 2216 verify_osdc_wrlocked(req->r_osdc); 2217 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2218 2219 if (req->r_osd) 2220 cancel_linger_request(req); 2221 2222 request_reinit(req); 2223 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 2224 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 2225 req->r_flags = lreq->t.flags; 2226 req->r_mtime = lreq->mtime; 2227 2228 mutex_lock(&lreq->lock); 2229 if (lreq->is_watch && lreq->committed) { 2230 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2231 op->watch.cookie != lreq->linger_id); 2232 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 2233 op->watch.gen = ++lreq->register_gen; 2234 dout("lreq %p reconnect register_gen %u\n", lreq, 2235 op->watch.gen); 2236 req->r_callback = linger_reconnect_cb; 2237 } else { 2238 if (!lreq->is_watch) 2239 lreq->notify_id = 0; 2240 else 2241 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 2242 dout("lreq %p register\n", lreq); 2243 req->r_callback = linger_commit_cb; 2244 } 2245 mutex_unlock(&lreq->lock); 2246 2247 req->r_priv = linger_get(lreq); 2248 req->r_linger = true; 2249 2250 submit_request(req, true); 2251 } 2252 2253 static void linger_ping_cb(struct ceph_osd_request *req) 2254 { 2255 struct ceph_osd_linger_request *lreq = req->r_priv; 2256 2257 mutex_lock(&lreq->lock); 2258 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 2259 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 2260 lreq->last_error); 2261 if (lreq->register_gen == req->r_ops[0].watch.gen) { 2262 if (!req->r_result) { 2263 lreq->watch_valid_thru = lreq->ping_sent; 2264 } else if (!lreq->last_error) { 2265 lreq->last_error = normalize_watch_error(req->r_result); 2266 queue_watch_error(lreq); 2267 } 2268 } else { 2269 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 2270 lreq->register_gen, req->r_ops[0].watch.gen); 2271 } 2272 2273 mutex_unlock(&lreq->lock); 2274 linger_put(lreq); 2275 } 2276 2277 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 2278 { 2279 struct ceph_osd_client *osdc = lreq->osdc; 2280 struct ceph_osd_request *req = lreq->ping_req; 2281 struct ceph_osd_req_op *op = &req->r_ops[0]; 2282 2283 if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD)) { 2284 dout("%s PAUSERD\n", __func__); 2285 return; 2286 } 2287 2288 lreq->ping_sent = jiffies; 2289 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 2290 __func__, lreq, lreq->linger_id, lreq->ping_sent, 2291 lreq->register_gen); 2292 2293 if (req->r_osd) 2294 cancel_linger_request(req); 2295 2296 request_reinit(req); 2297 target_copy(&req->r_t, &lreq->t); 2298 2299 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2300 op->watch.cookie != lreq->linger_id || 2301 op->watch.op != CEPH_OSD_WATCH_OP_PING); 2302 op->watch.gen = lreq->register_gen; 2303 req->r_callback = linger_ping_cb; 2304 req->r_priv = linger_get(lreq); 2305 req->r_linger = true; 2306 2307 ceph_osdc_get_request(req); 2308 account_request(req); 2309 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2310 link_request(lreq->osd, req); 2311 send_request(req); 2312 } 2313 2314 static void linger_submit(struct ceph_osd_linger_request *lreq) 2315 { 2316 struct ceph_osd_client *osdc = lreq->osdc; 2317 struct ceph_osd *osd; 2318 2319 calc_target(osdc, &lreq->t, &lreq->last_force_resend, false); 2320 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2321 link_linger(osd, lreq); 2322 2323 send_linger(lreq); 2324 } 2325 2326 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 2327 { 2328 struct ceph_osd_client *osdc = lreq->osdc; 2329 struct ceph_osd_linger_request *lookup_lreq; 2330 2331 verify_osdc_wrlocked(osdc); 2332 2333 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2334 lreq->linger_id); 2335 if (!lookup_lreq) 2336 return; 2337 2338 WARN_ON(lookup_lreq != lreq); 2339 erase_linger_mc(&osdc->linger_map_checks, lreq); 2340 linger_put(lreq); 2341 } 2342 2343 /* 2344 * @lreq has to be both registered and linked. 2345 */ 2346 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 2347 { 2348 if (lreq->is_watch && lreq->ping_req->r_osd) 2349 cancel_linger_request(lreq->ping_req); 2350 if (lreq->reg_req->r_osd) 2351 cancel_linger_request(lreq->reg_req); 2352 cancel_linger_map_check(lreq); 2353 unlink_linger(lreq->osd, lreq); 2354 linger_unregister(lreq); 2355 } 2356 2357 static void linger_cancel(struct ceph_osd_linger_request *lreq) 2358 { 2359 struct ceph_osd_client *osdc = lreq->osdc; 2360 2361 down_write(&osdc->lock); 2362 if (__linger_registered(lreq)) 2363 __linger_cancel(lreq); 2364 up_write(&osdc->lock); 2365 } 2366 2367 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 2368 2369 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 2370 { 2371 struct ceph_osd_client *osdc = lreq->osdc; 2372 struct ceph_osdmap *map = osdc->osdmap; 2373 2374 verify_osdc_wrlocked(osdc); 2375 WARN_ON(!map->epoch); 2376 2377 if (lreq->register_gen) { 2378 lreq->map_dne_bound = map->epoch; 2379 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 2380 lreq, lreq->linger_id); 2381 } else { 2382 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 2383 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2384 map->epoch); 2385 } 2386 2387 if (lreq->map_dne_bound) { 2388 if (map->epoch >= lreq->map_dne_bound) { 2389 /* we had a new enough map */ 2390 pr_info("linger_id %llu pool does not exist\n", 2391 lreq->linger_id); 2392 linger_reg_commit_complete(lreq, -ENOENT); 2393 __linger_cancel(lreq); 2394 } 2395 } else { 2396 send_linger_map_check(lreq); 2397 } 2398 } 2399 2400 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 2401 { 2402 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2403 struct ceph_osd_linger_request *lreq; 2404 u64 linger_id = greq->private_data; 2405 2406 WARN_ON(greq->result || !greq->u.newest); 2407 2408 down_write(&osdc->lock); 2409 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 2410 if (!lreq) { 2411 dout("%s linger_id %llu dne\n", __func__, linger_id); 2412 goto out_unlock; 2413 } 2414 2415 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 2416 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2417 greq->u.newest); 2418 if (!lreq->map_dne_bound) 2419 lreq->map_dne_bound = greq->u.newest; 2420 erase_linger_mc(&osdc->linger_map_checks, lreq); 2421 check_linger_pool_dne(lreq); 2422 2423 linger_put(lreq); 2424 out_unlock: 2425 up_write(&osdc->lock); 2426 } 2427 2428 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 2429 { 2430 struct ceph_osd_client *osdc = lreq->osdc; 2431 struct ceph_osd_linger_request *lookup_lreq; 2432 int ret; 2433 2434 verify_osdc_wrlocked(osdc); 2435 2436 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2437 lreq->linger_id); 2438 if (lookup_lreq) { 2439 WARN_ON(lookup_lreq != lreq); 2440 return; 2441 } 2442 2443 linger_get(lreq); 2444 insert_linger_mc(&osdc->linger_map_checks, lreq); 2445 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2446 linger_map_check_cb, lreq->linger_id); 2447 WARN_ON(ret); 2448 } 2449 2450 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 2451 { 2452 int ret; 2453 2454 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2455 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 2456 return ret ?: lreq->reg_commit_error; 2457 } 2458 2459 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 2460 { 2461 int ret; 2462 2463 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2464 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 2465 return ret ?: lreq->notify_finish_error; 2466 } 2467 2468 /* 2469 * Timeout callback, called every N seconds. When 1 or more OSD 2470 * requests has been active for more than N seconds, we send a keepalive 2471 * (tag + timestamp) to its OSD to ensure any communications channel 2472 * reset is detected. 2473 */ 2474 static void handle_timeout(struct work_struct *work) 2475 { 2476 struct ceph_osd_client *osdc = 2477 container_of(work, struct ceph_osd_client, timeout_work.work); 2478 struct ceph_options *opts = osdc->client->options; 2479 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 2480 LIST_HEAD(slow_osds); 2481 struct rb_node *n, *p; 2482 2483 dout("%s osdc %p\n", __func__, osdc); 2484 down_write(&osdc->lock); 2485 2486 /* 2487 * ping osds that are a bit slow. this ensures that if there 2488 * is a break in the TCP connection we will notice, and reopen 2489 * a connection with that osd (from the fault callback). 2490 */ 2491 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 2492 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 2493 bool found = false; 2494 2495 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 2496 struct ceph_osd_request *req = 2497 rb_entry(p, struct ceph_osd_request, r_node); 2498 2499 if (time_before(req->r_stamp, cutoff)) { 2500 dout(" req %p tid %llu on osd%d is laggy\n", 2501 req, req->r_tid, osd->o_osd); 2502 found = true; 2503 } 2504 } 2505 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 2506 struct ceph_osd_linger_request *lreq = 2507 rb_entry(p, struct ceph_osd_linger_request, node); 2508 2509 dout(" lreq %p linger_id %llu is served by osd%d\n", 2510 lreq, lreq->linger_id, osd->o_osd); 2511 found = true; 2512 2513 mutex_lock(&lreq->lock); 2514 if (lreq->is_watch && lreq->committed && !lreq->last_error) 2515 send_linger_ping(lreq); 2516 mutex_unlock(&lreq->lock); 2517 } 2518 2519 if (found) 2520 list_move_tail(&osd->o_keepalive_item, &slow_osds); 2521 } 2522 2523 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 2524 maybe_request_map(osdc); 2525 2526 while (!list_empty(&slow_osds)) { 2527 struct ceph_osd *osd = list_first_entry(&slow_osds, 2528 struct ceph_osd, 2529 o_keepalive_item); 2530 list_del_init(&osd->o_keepalive_item); 2531 ceph_con_keepalive(&osd->o_con); 2532 } 2533 2534 up_write(&osdc->lock); 2535 schedule_delayed_work(&osdc->timeout_work, 2536 osdc->client->options->osd_keepalive_timeout); 2537 } 2538 2539 static void handle_osds_timeout(struct work_struct *work) 2540 { 2541 struct ceph_osd_client *osdc = 2542 container_of(work, struct ceph_osd_client, 2543 osds_timeout_work.work); 2544 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 2545 struct ceph_osd *osd, *nosd; 2546 2547 dout("%s osdc %p\n", __func__, osdc); 2548 down_write(&osdc->lock); 2549 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 2550 if (time_before(jiffies, osd->lru_ttl)) 2551 break; 2552 2553 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 2554 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 2555 close_osd(osd); 2556 } 2557 2558 up_write(&osdc->lock); 2559 schedule_delayed_work(&osdc->osds_timeout_work, 2560 round_jiffies_relative(delay)); 2561 } 2562 2563 static int ceph_oloc_decode(void **p, void *end, 2564 struct ceph_object_locator *oloc) 2565 { 2566 u8 struct_v, struct_cv; 2567 u32 len; 2568 void *struct_end; 2569 int ret = 0; 2570 2571 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2572 struct_v = ceph_decode_8(p); 2573 struct_cv = ceph_decode_8(p); 2574 if (struct_v < 3) { 2575 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 2576 struct_v, struct_cv); 2577 goto e_inval; 2578 } 2579 if (struct_cv > 6) { 2580 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 2581 struct_v, struct_cv); 2582 goto e_inval; 2583 } 2584 len = ceph_decode_32(p); 2585 ceph_decode_need(p, end, len, e_inval); 2586 struct_end = *p + len; 2587 2588 oloc->pool = ceph_decode_64(p); 2589 *p += 4; /* skip preferred */ 2590 2591 len = ceph_decode_32(p); 2592 if (len > 0) { 2593 pr_warn("ceph_object_locator::key is set\n"); 2594 goto e_inval; 2595 } 2596 2597 if (struct_v >= 5) { 2598 len = ceph_decode_32(p); 2599 if (len > 0) { 2600 pr_warn("ceph_object_locator::nspace is set\n"); 2601 goto e_inval; 2602 } 2603 } 2604 2605 if (struct_v >= 6) { 2606 s64 hash = ceph_decode_64(p); 2607 if (hash != -1) { 2608 pr_warn("ceph_object_locator::hash is set\n"); 2609 goto e_inval; 2610 } 2611 } 2612 2613 /* skip the rest */ 2614 *p = struct_end; 2615 out: 2616 return ret; 2617 2618 e_inval: 2619 ret = -EINVAL; 2620 goto out; 2621 } 2622 2623 static int ceph_redirect_decode(void **p, void *end, 2624 struct ceph_request_redirect *redir) 2625 { 2626 u8 struct_v, struct_cv; 2627 u32 len; 2628 void *struct_end; 2629 int ret; 2630 2631 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2632 struct_v = ceph_decode_8(p); 2633 struct_cv = ceph_decode_8(p); 2634 if (struct_cv > 1) { 2635 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 2636 struct_v, struct_cv); 2637 goto e_inval; 2638 } 2639 len = ceph_decode_32(p); 2640 ceph_decode_need(p, end, len, e_inval); 2641 struct_end = *p + len; 2642 2643 ret = ceph_oloc_decode(p, end, &redir->oloc); 2644 if (ret) 2645 goto out; 2646 2647 len = ceph_decode_32(p); 2648 if (len > 0) { 2649 pr_warn("ceph_request_redirect::object_name is set\n"); 2650 goto e_inval; 2651 } 2652 2653 len = ceph_decode_32(p); 2654 *p += len; /* skip osd_instructions */ 2655 2656 /* skip the rest */ 2657 *p = struct_end; 2658 out: 2659 return ret; 2660 2661 e_inval: 2662 ret = -EINVAL; 2663 goto out; 2664 } 2665 2666 struct MOSDOpReply { 2667 struct ceph_pg pgid; 2668 u64 flags; 2669 int result; 2670 u32 epoch; 2671 int num_ops; 2672 u32 outdata_len[CEPH_OSD_MAX_OPS]; 2673 s32 rval[CEPH_OSD_MAX_OPS]; 2674 int retry_attempt; 2675 struct ceph_eversion replay_version; 2676 u64 user_version; 2677 struct ceph_request_redirect redirect; 2678 }; 2679 2680 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 2681 { 2682 void *p = msg->front.iov_base; 2683 void *const end = p + msg->front.iov_len; 2684 u16 version = le16_to_cpu(msg->hdr.version); 2685 struct ceph_eversion bad_replay_version; 2686 u8 decode_redir; 2687 u32 len; 2688 int ret; 2689 int i; 2690 2691 ceph_decode_32_safe(&p, end, len, e_inval); 2692 ceph_decode_need(&p, end, len, e_inval); 2693 p += len; /* skip oid */ 2694 2695 ret = ceph_decode_pgid(&p, end, &m->pgid); 2696 if (ret) 2697 return ret; 2698 2699 ceph_decode_64_safe(&p, end, m->flags, e_inval); 2700 ceph_decode_32_safe(&p, end, m->result, e_inval); 2701 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 2702 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 2703 p += sizeof(bad_replay_version); 2704 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 2705 2706 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 2707 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 2708 goto e_inval; 2709 2710 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 2711 e_inval); 2712 for (i = 0; i < m->num_ops; i++) { 2713 struct ceph_osd_op *op = p; 2714 2715 m->outdata_len[i] = le32_to_cpu(op->payload_len); 2716 p += sizeof(*op); 2717 } 2718 2719 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 2720 for (i = 0; i < m->num_ops; i++) 2721 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 2722 2723 if (version >= 5) { 2724 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 2725 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 2726 p += sizeof(m->replay_version); 2727 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 2728 } else { 2729 m->replay_version = bad_replay_version; /* struct */ 2730 m->user_version = le64_to_cpu(m->replay_version.version); 2731 } 2732 2733 if (version >= 6) { 2734 if (version >= 7) 2735 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 2736 else 2737 decode_redir = 1; 2738 } else { 2739 decode_redir = 0; 2740 } 2741 2742 if (decode_redir) { 2743 ret = ceph_redirect_decode(&p, end, &m->redirect); 2744 if (ret) 2745 return ret; 2746 } else { 2747 ceph_oloc_init(&m->redirect.oloc); 2748 } 2749 2750 return 0; 2751 2752 e_inval: 2753 return -EINVAL; 2754 } 2755 2756 /* 2757 * We are done with @req if 2758 * - @m is a safe reply, or 2759 * - @m is an unsafe reply and we didn't want a safe one 2760 */ 2761 static bool done_request(const struct ceph_osd_request *req, 2762 const struct MOSDOpReply *m) 2763 { 2764 return (m->result < 0 || 2765 (m->flags & CEPH_OSD_FLAG_ONDISK) || 2766 !(req->r_flags & CEPH_OSD_FLAG_ONDISK)); 2767 } 2768 2769 /* 2770 * handle osd op reply. either call the callback if it is specified, 2771 * or do the completion to wake up the waiting thread. 2772 * 2773 * ->r_unsafe_callback is set? yes no 2774 * 2775 * first reply is OK (needed r_cb/r_completion, r_cb/r_completion, 2776 * any or needed/got safe) r_safe_completion r_safe_completion 2777 * 2778 * first reply is unsafe r_unsafe_cb(true) (nothing) 2779 * 2780 * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion, 2781 * r_safe_completion r_safe_completion 2782 */ 2783 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 2784 { 2785 struct ceph_osd_client *osdc = osd->o_osdc; 2786 struct ceph_osd_request *req; 2787 struct MOSDOpReply m; 2788 u64 tid = le64_to_cpu(msg->hdr.tid); 2789 u32 data_len = 0; 2790 bool already_acked; 2791 int ret; 2792 int i; 2793 2794 dout("%s msg %p tid %llu\n", __func__, msg, tid); 2795 2796 down_read(&osdc->lock); 2797 if (!osd_registered(osd)) { 2798 dout("%s osd%d unknown\n", __func__, osd->o_osd); 2799 goto out_unlock_osdc; 2800 } 2801 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 2802 2803 mutex_lock(&osd->lock); 2804 req = lookup_request(&osd->o_requests, tid); 2805 if (!req) { 2806 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 2807 goto out_unlock_session; 2808 } 2809 2810 ret = decode_MOSDOpReply(msg, &m); 2811 if (ret) { 2812 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 2813 req->r_tid, ret); 2814 ceph_msg_dump(msg); 2815 goto fail_request; 2816 } 2817 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 2818 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 2819 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 2820 le64_to_cpu(m.replay_version.version), m.user_version); 2821 2822 if (m.retry_attempt >= 0) { 2823 if (m.retry_attempt != req->r_attempts - 1) { 2824 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 2825 req, req->r_tid, m.retry_attempt, 2826 req->r_attempts - 1); 2827 goto out_unlock_session; 2828 } 2829 } else { 2830 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 2831 } 2832 2833 if (!ceph_oloc_empty(&m.redirect.oloc)) { 2834 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 2835 m.redirect.oloc.pool); 2836 unlink_request(osd, req); 2837 mutex_unlock(&osd->lock); 2838 2839 ceph_oloc_copy(&req->r_t.target_oloc, &m.redirect.oloc); 2840 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED; 2841 req->r_tid = 0; 2842 __submit_request(req, false); 2843 goto out_unlock_osdc; 2844 } 2845 2846 if (m.num_ops != req->r_num_ops) { 2847 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 2848 req->r_num_ops, req->r_tid); 2849 goto fail_request; 2850 } 2851 for (i = 0; i < req->r_num_ops; i++) { 2852 dout(" req %p tid %llu op %d rval %d len %u\n", req, 2853 req->r_tid, i, m.rval[i], m.outdata_len[i]); 2854 req->r_ops[i].rval = m.rval[i]; 2855 req->r_ops[i].outdata_len = m.outdata_len[i]; 2856 data_len += m.outdata_len[i]; 2857 } 2858 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 2859 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 2860 le32_to_cpu(msg->hdr.data_len), req->r_tid); 2861 goto fail_request; 2862 } 2863 dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__, 2864 req, req->r_tid, req->r_got_reply, m.result, data_len); 2865 2866 already_acked = req->r_got_reply; 2867 if (!already_acked) { 2868 req->r_result = m.result ?: data_len; 2869 req->r_replay_version = m.replay_version; /* struct */ 2870 req->r_got_reply = true; 2871 } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) { 2872 dout("req %p tid %llu dup ack\n", req, req->r_tid); 2873 goto out_unlock_session; 2874 } 2875 2876 if (done_request(req, &m)) { 2877 __finish_request(req); 2878 if (req->r_linger) { 2879 WARN_ON(req->r_unsafe_callback); 2880 dout("req %p tid %llu cb (locked)\n", req, req->r_tid); 2881 __complete_request(req); 2882 } 2883 } 2884 2885 mutex_unlock(&osd->lock); 2886 up_read(&osdc->lock); 2887 2888 if (done_request(req, &m)) { 2889 if (already_acked && req->r_unsafe_callback) { 2890 dout("req %p tid %llu safe-cb\n", req, req->r_tid); 2891 req->r_unsafe_callback(req, false); 2892 } else if (!req->r_linger) { 2893 dout("req %p tid %llu cb\n", req, req->r_tid); 2894 __complete_request(req); 2895 } 2896 } else { 2897 if (req->r_unsafe_callback) { 2898 dout("req %p tid %llu unsafe-cb\n", req, req->r_tid); 2899 req->r_unsafe_callback(req, true); 2900 } else { 2901 WARN_ON(1); 2902 } 2903 } 2904 if (m.flags & CEPH_OSD_FLAG_ONDISK) 2905 complete_all(&req->r_safe_completion); 2906 2907 ceph_osdc_put_request(req); 2908 return; 2909 2910 fail_request: 2911 complete_request(req, -EIO); 2912 out_unlock_session: 2913 mutex_unlock(&osd->lock); 2914 out_unlock_osdc: 2915 up_read(&osdc->lock); 2916 } 2917 2918 static void set_pool_was_full(struct ceph_osd_client *osdc) 2919 { 2920 struct rb_node *n; 2921 2922 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 2923 struct ceph_pg_pool_info *pi = 2924 rb_entry(n, struct ceph_pg_pool_info, node); 2925 2926 pi->was_full = __pool_full(pi); 2927 } 2928 } 2929 2930 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 2931 { 2932 struct ceph_pg_pool_info *pi; 2933 2934 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 2935 if (!pi) 2936 return false; 2937 2938 return pi->was_full && !__pool_full(pi); 2939 } 2940 2941 static enum calc_target_result 2942 recalc_linger_target(struct ceph_osd_linger_request *lreq) 2943 { 2944 struct ceph_osd_client *osdc = lreq->osdc; 2945 enum calc_target_result ct_res; 2946 2947 ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true); 2948 if (ct_res == CALC_TARGET_NEED_RESEND) { 2949 struct ceph_osd *osd; 2950 2951 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2952 if (osd != lreq->osd) { 2953 unlink_linger(lreq->osd, lreq); 2954 link_linger(osd, lreq); 2955 } 2956 } 2957 2958 return ct_res; 2959 } 2960 2961 /* 2962 * Requeue requests whose mapping to an OSD has changed. 2963 */ 2964 static void scan_requests(struct ceph_osd *osd, 2965 bool force_resend, 2966 bool cleared_full, 2967 bool check_pool_cleared_full, 2968 struct rb_root *need_resend, 2969 struct list_head *need_resend_linger) 2970 { 2971 struct ceph_osd_client *osdc = osd->o_osdc; 2972 struct rb_node *n; 2973 bool force_resend_writes; 2974 2975 for (n = rb_first(&osd->o_linger_requests); n; ) { 2976 struct ceph_osd_linger_request *lreq = 2977 rb_entry(n, struct ceph_osd_linger_request, node); 2978 enum calc_target_result ct_res; 2979 2980 n = rb_next(n); /* recalc_linger_target() */ 2981 2982 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 2983 lreq->linger_id); 2984 ct_res = recalc_linger_target(lreq); 2985 switch (ct_res) { 2986 case CALC_TARGET_NO_ACTION: 2987 force_resend_writes = cleared_full || 2988 (check_pool_cleared_full && 2989 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 2990 if (!force_resend && !force_resend_writes) 2991 break; 2992 2993 /* fall through */ 2994 case CALC_TARGET_NEED_RESEND: 2995 cancel_linger_map_check(lreq); 2996 /* 2997 * scan_requests() for the previous epoch(s) 2998 * may have already added it to the list, since 2999 * it's not unlinked here. 3000 */ 3001 if (list_empty(&lreq->scan_item)) 3002 list_add_tail(&lreq->scan_item, need_resend_linger); 3003 break; 3004 case CALC_TARGET_POOL_DNE: 3005 check_linger_pool_dne(lreq); 3006 break; 3007 } 3008 } 3009 3010 for (n = rb_first(&osd->o_requests); n; ) { 3011 struct ceph_osd_request *req = 3012 rb_entry(n, struct ceph_osd_request, r_node); 3013 enum calc_target_result ct_res; 3014 3015 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3016 3017 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3018 ct_res = calc_target(osdc, &req->r_t, 3019 &req->r_last_force_resend, false); 3020 switch (ct_res) { 3021 case CALC_TARGET_NO_ACTION: 3022 force_resend_writes = cleared_full || 3023 (check_pool_cleared_full && 3024 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3025 if (!force_resend && 3026 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3027 !force_resend_writes)) 3028 break; 3029 3030 /* fall through */ 3031 case CALC_TARGET_NEED_RESEND: 3032 cancel_map_check(req); 3033 unlink_request(osd, req); 3034 insert_request(need_resend, req); 3035 break; 3036 case CALC_TARGET_POOL_DNE: 3037 check_pool_dne(req); 3038 break; 3039 } 3040 } 3041 } 3042 3043 static int handle_one_map(struct ceph_osd_client *osdc, 3044 void *p, void *end, bool incremental, 3045 struct rb_root *need_resend, 3046 struct list_head *need_resend_linger) 3047 { 3048 struct ceph_osdmap *newmap; 3049 struct rb_node *n; 3050 bool skipped_map = false; 3051 bool was_full; 3052 3053 was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 3054 set_pool_was_full(osdc); 3055 3056 if (incremental) 3057 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3058 else 3059 newmap = ceph_osdmap_decode(&p, end); 3060 if (IS_ERR(newmap)) 3061 return PTR_ERR(newmap); 3062 3063 if (newmap != osdc->osdmap) { 3064 /* 3065 * Preserve ->was_full before destroying the old map. 3066 * For pools that weren't in the old map, ->was_full 3067 * should be false. 3068 */ 3069 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3070 struct ceph_pg_pool_info *pi = 3071 rb_entry(n, struct ceph_pg_pool_info, node); 3072 struct ceph_pg_pool_info *old_pi; 3073 3074 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3075 if (old_pi) 3076 pi->was_full = old_pi->was_full; 3077 else 3078 WARN_ON(pi->was_full); 3079 } 3080 3081 if (osdc->osdmap->epoch && 3082 osdc->osdmap->epoch + 1 < newmap->epoch) { 3083 WARN_ON(incremental); 3084 skipped_map = true; 3085 } 3086 3087 ceph_osdmap_destroy(osdc->osdmap); 3088 osdc->osdmap = newmap; 3089 } 3090 3091 was_full &= !ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); 3092 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3093 need_resend, need_resend_linger); 3094 3095 for (n = rb_first(&osdc->osds); n; ) { 3096 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3097 3098 n = rb_next(n); /* close_osd() */ 3099 3100 scan_requests(osd, skipped_map, was_full, true, need_resend, 3101 need_resend_linger); 3102 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3103 memcmp(&osd->o_con.peer_addr, 3104 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3105 sizeof(struct ceph_entity_addr))) 3106 close_osd(osd); 3107 } 3108 3109 return 0; 3110 } 3111 3112 static void kick_requests(struct ceph_osd_client *osdc, 3113 struct rb_root *need_resend, 3114 struct list_head *need_resend_linger) 3115 { 3116 struct ceph_osd_linger_request *lreq, *nlreq; 3117 struct rb_node *n; 3118 3119 for (n = rb_first(need_resend); n; ) { 3120 struct ceph_osd_request *req = 3121 rb_entry(n, struct ceph_osd_request, r_node); 3122 struct ceph_osd *osd; 3123 3124 n = rb_next(n); 3125 erase_request(need_resend, req); /* before link_request() */ 3126 3127 WARN_ON(req->r_osd); 3128 calc_target(osdc, &req->r_t, NULL, false); 3129 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3130 link_request(osd, req); 3131 if (!req->r_linger) { 3132 if (!osd_homeless(osd) && !req->r_t.paused) 3133 send_request(req); 3134 } else { 3135 cancel_linger_request(req); 3136 } 3137 } 3138 3139 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3140 if (!osd_homeless(lreq->osd)) 3141 send_linger(lreq); 3142 3143 list_del_init(&lreq->scan_item); 3144 } 3145 } 3146 3147 /* 3148 * Process updated osd map. 3149 * 3150 * The message contains any number of incremental and full maps, normally 3151 * indicating some sort of topology change in the cluster. Kick requests 3152 * off to different OSDs as needed. 3153 */ 3154 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3155 { 3156 void *p = msg->front.iov_base; 3157 void *const end = p + msg->front.iov_len; 3158 u32 nr_maps, maplen; 3159 u32 epoch; 3160 struct ceph_fsid fsid; 3161 struct rb_root need_resend = RB_ROOT; 3162 LIST_HEAD(need_resend_linger); 3163 bool handled_incremental = false; 3164 bool was_pauserd, was_pausewr; 3165 bool pauserd, pausewr; 3166 int err; 3167 3168 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3169 down_write(&osdc->lock); 3170 3171 /* verify fsid */ 3172 ceph_decode_need(&p, end, sizeof(fsid), bad); 3173 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3174 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3175 goto bad; 3176 3177 was_pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); 3178 was_pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || 3179 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 3180 have_pool_full(osdc); 3181 3182 /* incremental maps */ 3183 ceph_decode_32_safe(&p, end, nr_maps, bad); 3184 dout(" %d inc maps\n", nr_maps); 3185 while (nr_maps > 0) { 3186 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3187 epoch = ceph_decode_32(&p); 3188 maplen = ceph_decode_32(&p); 3189 ceph_decode_need(&p, end, maplen, bad); 3190 if (osdc->osdmap->epoch && 3191 osdc->osdmap->epoch + 1 == epoch) { 3192 dout("applying incremental map %u len %d\n", 3193 epoch, maplen); 3194 err = handle_one_map(osdc, p, p + maplen, true, 3195 &need_resend, &need_resend_linger); 3196 if (err) 3197 goto bad; 3198 handled_incremental = true; 3199 } else { 3200 dout("ignoring incremental map %u len %d\n", 3201 epoch, maplen); 3202 } 3203 p += maplen; 3204 nr_maps--; 3205 } 3206 if (handled_incremental) 3207 goto done; 3208 3209 /* full maps */ 3210 ceph_decode_32_safe(&p, end, nr_maps, bad); 3211 dout(" %d full maps\n", nr_maps); 3212 while (nr_maps) { 3213 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3214 epoch = ceph_decode_32(&p); 3215 maplen = ceph_decode_32(&p); 3216 ceph_decode_need(&p, end, maplen, bad); 3217 if (nr_maps > 1) { 3218 dout("skipping non-latest full map %u len %d\n", 3219 epoch, maplen); 3220 } else if (osdc->osdmap->epoch >= epoch) { 3221 dout("skipping full map %u len %d, " 3222 "older than our %u\n", epoch, maplen, 3223 osdc->osdmap->epoch); 3224 } else { 3225 dout("taking full map %u len %d\n", epoch, maplen); 3226 err = handle_one_map(osdc, p, p + maplen, false, 3227 &need_resend, &need_resend_linger); 3228 if (err) 3229 goto bad; 3230 } 3231 p += maplen; 3232 nr_maps--; 3233 } 3234 3235 done: 3236 /* 3237 * subscribe to subsequent osdmap updates if full to ensure 3238 * we find out when we are no longer full and stop returning 3239 * ENOSPC. 3240 */ 3241 pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); 3242 pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || 3243 ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || 3244 have_pool_full(osdc); 3245 if (was_pauserd || was_pausewr || pauserd || pausewr) 3246 maybe_request_map(osdc); 3247 3248 kick_requests(osdc, &need_resend, &need_resend_linger); 3249 3250 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 3251 osdc->osdmap->epoch); 3252 up_write(&osdc->lock); 3253 wake_up_all(&osdc->client->auth_wq); 3254 return; 3255 3256 bad: 3257 pr_err("osdc handle_map corrupt msg\n"); 3258 ceph_msg_dump(msg); 3259 up_write(&osdc->lock); 3260 } 3261 3262 /* 3263 * Resubmit requests pending on the given osd. 3264 */ 3265 static void kick_osd_requests(struct ceph_osd *osd) 3266 { 3267 struct rb_node *n; 3268 3269 for (n = rb_first(&osd->o_requests); n; ) { 3270 struct ceph_osd_request *req = 3271 rb_entry(n, struct ceph_osd_request, r_node); 3272 3273 n = rb_next(n); /* cancel_linger_request() */ 3274 3275 if (!req->r_linger) { 3276 if (!req->r_t.paused) 3277 send_request(req); 3278 } else { 3279 cancel_linger_request(req); 3280 } 3281 } 3282 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 3283 struct ceph_osd_linger_request *lreq = 3284 rb_entry(n, struct ceph_osd_linger_request, node); 3285 3286 send_linger(lreq); 3287 } 3288 } 3289 3290 /* 3291 * If the osd connection drops, we need to resubmit all requests. 3292 */ 3293 static void osd_fault(struct ceph_connection *con) 3294 { 3295 struct ceph_osd *osd = con->private; 3296 struct ceph_osd_client *osdc = osd->o_osdc; 3297 3298 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 3299 3300 down_write(&osdc->lock); 3301 if (!osd_registered(osd)) { 3302 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3303 goto out_unlock; 3304 } 3305 3306 if (!reopen_osd(osd)) 3307 kick_osd_requests(osd); 3308 maybe_request_map(osdc); 3309 3310 out_unlock: 3311 up_write(&osdc->lock); 3312 } 3313 3314 /* 3315 * Process osd watch notifications 3316 */ 3317 static void handle_watch_notify(struct ceph_osd_client *osdc, 3318 struct ceph_msg *msg) 3319 { 3320 void *p = msg->front.iov_base; 3321 void *const end = p + msg->front.iov_len; 3322 struct ceph_osd_linger_request *lreq; 3323 struct linger_work *lwork; 3324 u8 proto_ver, opcode; 3325 u64 cookie, notify_id; 3326 u64 notifier_id = 0; 3327 s32 return_code = 0; 3328 void *payload = NULL; 3329 u32 payload_len = 0; 3330 3331 ceph_decode_8_safe(&p, end, proto_ver, bad); 3332 ceph_decode_8_safe(&p, end, opcode, bad); 3333 ceph_decode_64_safe(&p, end, cookie, bad); 3334 p += 8; /* skip ver */ 3335 ceph_decode_64_safe(&p, end, notify_id, bad); 3336 3337 if (proto_ver >= 1) { 3338 ceph_decode_32_safe(&p, end, payload_len, bad); 3339 ceph_decode_need(&p, end, payload_len, bad); 3340 payload = p; 3341 p += payload_len; 3342 } 3343 3344 if (le16_to_cpu(msg->hdr.version) >= 2) 3345 ceph_decode_32_safe(&p, end, return_code, bad); 3346 3347 if (le16_to_cpu(msg->hdr.version) >= 3) 3348 ceph_decode_64_safe(&p, end, notifier_id, bad); 3349 3350 down_read(&osdc->lock); 3351 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 3352 if (!lreq) { 3353 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 3354 cookie); 3355 goto out_unlock_osdc; 3356 } 3357 3358 mutex_lock(&lreq->lock); 3359 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 3360 opcode, cookie, lreq, lreq->is_watch); 3361 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 3362 if (!lreq->last_error) { 3363 lreq->last_error = -ENOTCONN; 3364 queue_watch_error(lreq); 3365 } 3366 } else if (!lreq->is_watch) { 3367 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 3368 if (lreq->notify_id && lreq->notify_id != notify_id) { 3369 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 3370 lreq->notify_id, notify_id); 3371 } else if (!completion_done(&lreq->notify_finish_wait)) { 3372 struct ceph_msg_data *data = 3373 list_first_entry_or_null(&msg->data, 3374 struct ceph_msg_data, 3375 links); 3376 3377 if (data) { 3378 if (lreq->preply_pages) { 3379 WARN_ON(data->type != 3380 CEPH_MSG_DATA_PAGES); 3381 *lreq->preply_pages = data->pages; 3382 *lreq->preply_len = data->length; 3383 } else { 3384 ceph_release_page_vector(data->pages, 3385 calc_pages_for(0, data->length)); 3386 } 3387 } 3388 lreq->notify_finish_error = return_code; 3389 complete_all(&lreq->notify_finish_wait); 3390 } 3391 } else { 3392 /* CEPH_WATCH_EVENT_NOTIFY */ 3393 lwork = lwork_alloc(lreq, do_watch_notify); 3394 if (!lwork) { 3395 pr_err("failed to allocate notify-lwork\n"); 3396 goto out_unlock_lreq; 3397 } 3398 3399 lwork->notify.notify_id = notify_id; 3400 lwork->notify.notifier_id = notifier_id; 3401 lwork->notify.payload = payload; 3402 lwork->notify.payload_len = payload_len; 3403 lwork->notify.msg = ceph_msg_get(msg); 3404 lwork_queue(lwork); 3405 } 3406 3407 out_unlock_lreq: 3408 mutex_unlock(&lreq->lock); 3409 out_unlock_osdc: 3410 up_read(&osdc->lock); 3411 return; 3412 3413 bad: 3414 pr_err("osdc handle_watch_notify corrupt msg\n"); 3415 } 3416 3417 /* 3418 * Register request, send initial attempt. 3419 */ 3420 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 3421 struct ceph_osd_request *req, 3422 bool nofail) 3423 { 3424 down_read(&osdc->lock); 3425 submit_request(req, false); 3426 up_read(&osdc->lock); 3427 3428 return 0; 3429 } 3430 EXPORT_SYMBOL(ceph_osdc_start_request); 3431 3432 /* 3433 * Unregister a registered request. The request is not completed (i.e. 3434 * no callbacks or wakeups) - higher layers are supposed to know what 3435 * they are canceling. 3436 */ 3437 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 3438 { 3439 struct ceph_osd_client *osdc = req->r_osdc; 3440 3441 down_write(&osdc->lock); 3442 if (req->r_osd) 3443 cancel_request(req); 3444 up_write(&osdc->lock); 3445 } 3446 EXPORT_SYMBOL(ceph_osdc_cancel_request); 3447 3448 /* 3449 * @timeout: in jiffies, 0 means "wait forever" 3450 */ 3451 static int wait_request_timeout(struct ceph_osd_request *req, 3452 unsigned long timeout) 3453 { 3454 long left; 3455 3456 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3457 left = wait_for_completion_killable_timeout(&req->r_completion, 3458 ceph_timeout_jiffies(timeout)); 3459 if (left <= 0) { 3460 left = left ?: -ETIMEDOUT; 3461 ceph_osdc_cancel_request(req); 3462 3463 /* kludge - need to to wake ceph_osdc_sync() */ 3464 complete_all(&req->r_safe_completion); 3465 } else { 3466 left = req->r_result; /* completed */ 3467 } 3468 3469 return left; 3470 } 3471 3472 /* 3473 * wait for a request to complete 3474 */ 3475 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 3476 struct ceph_osd_request *req) 3477 { 3478 return wait_request_timeout(req, 0); 3479 } 3480 EXPORT_SYMBOL(ceph_osdc_wait_request); 3481 3482 /* 3483 * sync - wait for all in-flight requests to flush. avoid starvation. 3484 */ 3485 void ceph_osdc_sync(struct ceph_osd_client *osdc) 3486 { 3487 struct rb_node *n, *p; 3488 u64 last_tid = atomic64_read(&osdc->last_tid); 3489 3490 again: 3491 down_read(&osdc->lock); 3492 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3493 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3494 3495 mutex_lock(&osd->lock); 3496 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 3497 struct ceph_osd_request *req = 3498 rb_entry(p, struct ceph_osd_request, r_node); 3499 3500 if (req->r_tid > last_tid) 3501 break; 3502 3503 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 3504 continue; 3505 3506 ceph_osdc_get_request(req); 3507 mutex_unlock(&osd->lock); 3508 up_read(&osdc->lock); 3509 dout("%s waiting on req %p tid %llu last_tid %llu\n", 3510 __func__, req, req->r_tid, last_tid); 3511 wait_for_completion(&req->r_safe_completion); 3512 ceph_osdc_put_request(req); 3513 goto again; 3514 } 3515 3516 mutex_unlock(&osd->lock); 3517 } 3518 3519 up_read(&osdc->lock); 3520 dout("%s done last_tid %llu\n", __func__, last_tid); 3521 } 3522 EXPORT_SYMBOL(ceph_osdc_sync); 3523 3524 static struct ceph_osd_request * 3525 alloc_linger_request(struct ceph_osd_linger_request *lreq) 3526 { 3527 struct ceph_osd_request *req; 3528 3529 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 3530 if (!req) 3531 return NULL; 3532 3533 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3534 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3535 3536 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 3537 ceph_osdc_put_request(req); 3538 return NULL; 3539 } 3540 3541 return req; 3542 } 3543 3544 /* 3545 * Returns a handle, caller owns a ref. 3546 */ 3547 struct ceph_osd_linger_request * 3548 ceph_osdc_watch(struct ceph_osd_client *osdc, 3549 struct ceph_object_id *oid, 3550 struct ceph_object_locator *oloc, 3551 rados_watchcb2_t wcb, 3552 rados_watcherrcb_t errcb, 3553 void *data) 3554 { 3555 struct ceph_osd_linger_request *lreq; 3556 int ret; 3557 3558 lreq = linger_alloc(osdc); 3559 if (!lreq) 3560 return ERR_PTR(-ENOMEM); 3561 3562 lreq->is_watch = true; 3563 lreq->wcb = wcb; 3564 lreq->errcb = errcb; 3565 lreq->data = data; 3566 lreq->watch_valid_thru = jiffies; 3567 3568 ceph_oid_copy(&lreq->t.base_oid, oid); 3569 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3570 lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3571 lreq->mtime = CURRENT_TIME; 3572 3573 lreq->reg_req = alloc_linger_request(lreq); 3574 if (!lreq->reg_req) { 3575 ret = -ENOMEM; 3576 goto err_put_lreq; 3577 } 3578 3579 lreq->ping_req = alloc_linger_request(lreq); 3580 if (!lreq->ping_req) { 3581 ret = -ENOMEM; 3582 goto err_put_lreq; 3583 } 3584 3585 down_write(&osdc->lock); 3586 linger_register(lreq); /* before osd_req_op_* */ 3587 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id, 3588 CEPH_OSD_WATCH_OP_WATCH); 3589 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id, 3590 CEPH_OSD_WATCH_OP_PING); 3591 linger_submit(lreq); 3592 up_write(&osdc->lock); 3593 3594 ret = linger_reg_commit_wait(lreq); 3595 if (ret) { 3596 linger_cancel(lreq); 3597 goto err_put_lreq; 3598 } 3599 3600 return lreq; 3601 3602 err_put_lreq: 3603 linger_put(lreq); 3604 return ERR_PTR(ret); 3605 } 3606 EXPORT_SYMBOL(ceph_osdc_watch); 3607 3608 /* 3609 * Releases a ref. 3610 * 3611 * Times out after mount_timeout to preserve rbd unmap behaviour 3612 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 3613 * with mount_timeout"). 3614 */ 3615 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 3616 struct ceph_osd_linger_request *lreq) 3617 { 3618 struct ceph_options *opts = osdc->client->options; 3619 struct ceph_osd_request *req; 3620 int ret; 3621 3622 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3623 if (!req) 3624 return -ENOMEM; 3625 3626 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3627 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3628 req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3629 req->r_mtime = CURRENT_TIME; 3630 osd_req_op_watch_init(req, 0, lreq->linger_id, 3631 CEPH_OSD_WATCH_OP_UNWATCH); 3632 3633 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3634 if (ret) 3635 goto out_put_req; 3636 3637 ceph_osdc_start_request(osdc, req, false); 3638 linger_cancel(lreq); 3639 linger_put(lreq); 3640 ret = wait_request_timeout(req, opts->mount_timeout); 3641 3642 out_put_req: 3643 ceph_osdc_put_request(req); 3644 return ret; 3645 } 3646 EXPORT_SYMBOL(ceph_osdc_unwatch); 3647 3648 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 3649 u64 notify_id, u64 cookie, void *payload, 3650 size_t payload_len) 3651 { 3652 struct ceph_osd_req_op *op; 3653 struct ceph_pagelist *pl; 3654 int ret; 3655 3656 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 3657 3658 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3659 if (!pl) 3660 return -ENOMEM; 3661 3662 ceph_pagelist_init(pl); 3663 ret = ceph_pagelist_encode_64(pl, notify_id); 3664 ret |= ceph_pagelist_encode_64(pl, cookie); 3665 if (payload) { 3666 ret |= ceph_pagelist_encode_32(pl, payload_len); 3667 ret |= ceph_pagelist_append(pl, payload, payload_len); 3668 } else { 3669 ret |= ceph_pagelist_encode_32(pl, 0); 3670 } 3671 if (ret) { 3672 ceph_pagelist_release(pl); 3673 return -ENOMEM; 3674 } 3675 3676 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 3677 op->indata_len = pl->length; 3678 return 0; 3679 } 3680 3681 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 3682 struct ceph_object_id *oid, 3683 struct ceph_object_locator *oloc, 3684 u64 notify_id, 3685 u64 cookie, 3686 void *payload, 3687 size_t payload_len) 3688 { 3689 struct ceph_osd_request *req; 3690 int ret; 3691 3692 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3693 if (!req) 3694 return -ENOMEM; 3695 3696 ceph_oid_copy(&req->r_base_oid, oid); 3697 ceph_oloc_copy(&req->r_base_oloc, oloc); 3698 req->r_flags = CEPH_OSD_FLAG_READ; 3699 3700 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3701 if (ret) 3702 goto out_put_req; 3703 3704 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 3705 payload_len); 3706 if (ret) 3707 goto out_put_req; 3708 3709 ceph_osdc_start_request(osdc, req, false); 3710 ret = ceph_osdc_wait_request(osdc, req); 3711 3712 out_put_req: 3713 ceph_osdc_put_request(req); 3714 return ret; 3715 } 3716 EXPORT_SYMBOL(ceph_osdc_notify_ack); 3717 3718 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 3719 u64 cookie, u32 prot_ver, u32 timeout, 3720 void *payload, size_t payload_len) 3721 { 3722 struct ceph_osd_req_op *op; 3723 struct ceph_pagelist *pl; 3724 int ret; 3725 3726 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 3727 op->notify.cookie = cookie; 3728 3729 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3730 if (!pl) 3731 return -ENOMEM; 3732 3733 ceph_pagelist_init(pl); 3734 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 3735 ret |= ceph_pagelist_encode_32(pl, timeout); 3736 ret |= ceph_pagelist_encode_32(pl, payload_len); 3737 ret |= ceph_pagelist_append(pl, payload, payload_len); 3738 if (ret) { 3739 ceph_pagelist_release(pl); 3740 return -ENOMEM; 3741 } 3742 3743 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 3744 op->indata_len = pl->length; 3745 return 0; 3746 } 3747 3748 /* 3749 * @timeout: in seconds 3750 * 3751 * @preply_{pages,len} are initialized both on success and error. 3752 * The caller is responsible for: 3753 * 3754 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 3755 */ 3756 int ceph_osdc_notify(struct ceph_osd_client *osdc, 3757 struct ceph_object_id *oid, 3758 struct ceph_object_locator *oloc, 3759 void *payload, 3760 size_t payload_len, 3761 u32 timeout, 3762 struct page ***preply_pages, 3763 size_t *preply_len) 3764 { 3765 struct ceph_osd_linger_request *lreq; 3766 struct page **pages; 3767 int ret; 3768 3769 WARN_ON(!timeout); 3770 if (preply_pages) { 3771 *preply_pages = NULL; 3772 *preply_len = 0; 3773 } 3774 3775 lreq = linger_alloc(osdc); 3776 if (!lreq) 3777 return -ENOMEM; 3778 3779 lreq->preply_pages = preply_pages; 3780 lreq->preply_len = preply_len; 3781 3782 ceph_oid_copy(&lreq->t.base_oid, oid); 3783 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3784 lreq->t.flags = CEPH_OSD_FLAG_READ; 3785 3786 lreq->reg_req = alloc_linger_request(lreq); 3787 if (!lreq->reg_req) { 3788 ret = -ENOMEM; 3789 goto out_put_lreq; 3790 } 3791 3792 /* for notify_id */ 3793 pages = ceph_alloc_page_vector(1, GFP_NOIO); 3794 if (IS_ERR(pages)) { 3795 ret = PTR_ERR(pages); 3796 goto out_put_lreq; 3797 } 3798 3799 down_write(&osdc->lock); 3800 linger_register(lreq); /* before osd_req_op_* */ 3801 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1, 3802 timeout, payload, payload_len); 3803 if (ret) { 3804 linger_unregister(lreq); 3805 up_write(&osdc->lock); 3806 ceph_release_page_vector(pages, 1); 3807 goto out_put_lreq; 3808 } 3809 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 3810 response_data), 3811 pages, PAGE_SIZE, 0, false, true); 3812 linger_submit(lreq); 3813 up_write(&osdc->lock); 3814 3815 ret = linger_reg_commit_wait(lreq); 3816 if (!ret) 3817 ret = linger_notify_finish_wait(lreq); 3818 else 3819 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 3820 3821 linger_cancel(lreq); 3822 out_put_lreq: 3823 linger_put(lreq); 3824 return ret; 3825 } 3826 EXPORT_SYMBOL(ceph_osdc_notify); 3827 3828 /* 3829 * Return the number of milliseconds since the watch was last 3830 * confirmed, or an error. If there is an error, the watch is no 3831 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 3832 */ 3833 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 3834 struct ceph_osd_linger_request *lreq) 3835 { 3836 unsigned long stamp, age; 3837 int ret; 3838 3839 down_read(&osdc->lock); 3840 mutex_lock(&lreq->lock); 3841 stamp = lreq->watch_valid_thru; 3842 if (!list_empty(&lreq->pending_lworks)) { 3843 struct linger_work *lwork = 3844 list_first_entry(&lreq->pending_lworks, 3845 struct linger_work, 3846 pending_item); 3847 3848 if (time_before(lwork->queued_stamp, stamp)) 3849 stamp = lwork->queued_stamp; 3850 } 3851 age = jiffies - stamp; 3852 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 3853 lreq, lreq->linger_id, age, lreq->last_error); 3854 /* we are truncating to msecs, so return a safe upper bound */ 3855 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 3856 3857 mutex_unlock(&lreq->lock); 3858 up_read(&osdc->lock); 3859 return ret; 3860 } 3861 3862 /* 3863 * Call all pending notify callbacks - for use after a watch is 3864 * unregistered, to make sure no more callbacks for it will be invoked 3865 */ 3866 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 3867 { 3868 flush_workqueue(osdc->notify_wq); 3869 } 3870 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 3871 3872 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 3873 { 3874 down_read(&osdc->lock); 3875 maybe_request_map(osdc); 3876 up_read(&osdc->lock); 3877 } 3878 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 3879 3880 /* 3881 * init, shutdown 3882 */ 3883 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 3884 { 3885 int err; 3886 3887 dout("init\n"); 3888 osdc->client = client; 3889 init_rwsem(&osdc->lock); 3890 osdc->osds = RB_ROOT; 3891 INIT_LIST_HEAD(&osdc->osd_lru); 3892 spin_lock_init(&osdc->osd_lru_lock); 3893 osd_init(&osdc->homeless_osd); 3894 osdc->homeless_osd.o_osdc = osdc; 3895 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 3896 osdc->linger_requests = RB_ROOT; 3897 osdc->map_checks = RB_ROOT; 3898 osdc->linger_map_checks = RB_ROOT; 3899 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 3900 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 3901 3902 err = -ENOMEM; 3903 osdc->osdmap = ceph_osdmap_alloc(); 3904 if (!osdc->osdmap) 3905 goto out; 3906 3907 osdc->req_mempool = mempool_create_slab_pool(10, 3908 ceph_osd_request_cache); 3909 if (!osdc->req_mempool) 3910 goto out_map; 3911 3912 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 3913 PAGE_SIZE, 10, true, "osd_op"); 3914 if (err < 0) 3915 goto out_mempool; 3916 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 3917 PAGE_SIZE, 10, true, "osd_op_reply"); 3918 if (err < 0) 3919 goto out_msgpool; 3920 3921 err = -ENOMEM; 3922 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 3923 if (!osdc->notify_wq) 3924 goto out_msgpool_reply; 3925 3926 schedule_delayed_work(&osdc->timeout_work, 3927 osdc->client->options->osd_keepalive_timeout); 3928 schedule_delayed_work(&osdc->osds_timeout_work, 3929 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 3930 3931 return 0; 3932 3933 out_msgpool_reply: 3934 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 3935 out_msgpool: 3936 ceph_msgpool_destroy(&osdc->msgpool_op); 3937 out_mempool: 3938 mempool_destroy(osdc->req_mempool); 3939 out_map: 3940 ceph_osdmap_destroy(osdc->osdmap); 3941 out: 3942 return err; 3943 } 3944 3945 void ceph_osdc_stop(struct ceph_osd_client *osdc) 3946 { 3947 flush_workqueue(osdc->notify_wq); 3948 destroy_workqueue(osdc->notify_wq); 3949 cancel_delayed_work_sync(&osdc->timeout_work); 3950 cancel_delayed_work_sync(&osdc->osds_timeout_work); 3951 3952 down_write(&osdc->lock); 3953 while (!RB_EMPTY_ROOT(&osdc->osds)) { 3954 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 3955 struct ceph_osd, o_node); 3956 close_osd(osd); 3957 } 3958 up_write(&osdc->lock); 3959 WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1); 3960 osd_cleanup(&osdc->homeless_osd); 3961 3962 WARN_ON(!list_empty(&osdc->osd_lru)); 3963 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 3964 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 3965 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 3966 WARN_ON(atomic_read(&osdc->num_requests)); 3967 WARN_ON(atomic_read(&osdc->num_homeless)); 3968 3969 ceph_osdmap_destroy(osdc->osdmap); 3970 mempool_destroy(osdc->req_mempool); 3971 ceph_msgpool_destroy(&osdc->msgpool_op); 3972 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 3973 } 3974 3975 /* 3976 * Read some contiguous pages. If we cross a stripe boundary, shorten 3977 * *plen. Return number of bytes read, or error. 3978 */ 3979 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 3980 struct ceph_vino vino, struct ceph_file_layout *layout, 3981 u64 off, u64 *plen, 3982 u32 truncate_seq, u64 truncate_size, 3983 struct page **pages, int num_pages, int page_align) 3984 { 3985 struct ceph_osd_request *req; 3986 int rc = 0; 3987 3988 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 3989 vino.snap, off, *plen); 3990 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 3991 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 3992 NULL, truncate_seq, truncate_size, 3993 false); 3994 if (IS_ERR(req)) 3995 return PTR_ERR(req); 3996 3997 /* it may be a short read due to an object boundary */ 3998 osd_req_op_extent_osd_data_pages(req, 0, 3999 pages, *plen, page_align, false, false); 4000 4001 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 4002 off, *plen, *plen, page_align); 4003 4004 rc = ceph_osdc_start_request(osdc, req, false); 4005 if (!rc) 4006 rc = ceph_osdc_wait_request(osdc, req); 4007 4008 ceph_osdc_put_request(req); 4009 dout("readpages result %d\n", rc); 4010 return rc; 4011 } 4012 EXPORT_SYMBOL(ceph_osdc_readpages); 4013 4014 /* 4015 * do a synchronous write on N pages 4016 */ 4017 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 4018 struct ceph_file_layout *layout, 4019 struct ceph_snap_context *snapc, 4020 u64 off, u64 len, 4021 u32 truncate_seq, u64 truncate_size, 4022 struct timespec *mtime, 4023 struct page **pages, int num_pages) 4024 { 4025 struct ceph_osd_request *req; 4026 int rc = 0; 4027 int page_align = off & ~PAGE_MASK; 4028 4029 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 4030 CEPH_OSD_OP_WRITE, 4031 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 4032 snapc, truncate_seq, truncate_size, 4033 true); 4034 if (IS_ERR(req)) 4035 return PTR_ERR(req); 4036 4037 /* it may be a short write due to an object boundary */ 4038 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 4039 false, false); 4040 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 4041 4042 req->r_mtime = *mtime; 4043 rc = ceph_osdc_start_request(osdc, req, true); 4044 if (!rc) 4045 rc = ceph_osdc_wait_request(osdc, req); 4046 4047 ceph_osdc_put_request(req); 4048 if (rc == 0) 4049 rc = len; 4050 dout("writepages result %d\n", rc); 4051 return rc; 4052 } 4053 EXPORT_SYMBOL(ceph_osdc_writepages); 4054 4055 int ceph_osdc_setup(void) 4056 { 4057 size_t size = sizeof(struct ceph_osd_request) + 4058 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 4059 4060 BUG_ON(ceph_osd_request_cache); 4061 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 4062 0, 0, NULL); 4063 4064 return ceph_osd_request_cache ? 0 : -ENOMEM; 4065 } 4066 EXPORT_SYMBOL(ceph_osdc_setup); 4067 4068 void ceph_osdc_cleanup(void) 4069 { 4070 BUG_ON(!ceph_osd_request_cache); 4071 kmem_cache_destroy(ceph_osd_request_cache); 4072 ceph_osd_request_cache = NULL; 4073 } 4074 EXPORT_SYMBOL(ceph_osdc_cleanup); 4075 4076 /* 4077 * handle incoming message 4078 */ 4079 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 4080 { 4081 struct ceph_osd *osd = con->private; 4082 struct ceph_osd_client *osdc = osd->o_osdc; 4083 int type = le16_to_cpu(msg->hdr.type); 4084 4085 switch (type) { 4086 case CEPH_MSG_OSD_MAP: 4087 ceph_osdc_handle_map(osdc, msg); 4088 break; 4089 case CEPH_MSG_OSD_OPREPLY: 4090 handle_reply(osd, msg); 4091 break; 4092 case CEPH_MSG_WATCH_NOTIFY: 4093 handle_watch_notify(osdc, msg); 4094 break; 4095 4096 default: 4097 pr_err("received unknown message type %d %s\n", type, 4098 ceph_msg_type_name(type)); 4099 } 4100 4101 ceph_msg_put(msg); 4102 } 4103 4104 /* 4105 * Lookup and return message for incoming reply. Don't try to do 4106 * anything about a larger than preallocated data portion of the 4107 * message at the moment - for now, just skip the message. 4108 */ 4109 static struct ceph_msg *get_reply(struct ceph_connection *con, 4110 struct ceph_msg_header *hdr, 4111 int *skip) 4112 { 4113 struct ceph_osd *osd = con->private; 4114 struct ceph_osd_client *osdc = osd->o_osdc; 4115 struct ceph_msg *m = NULL; 4116 struct ceph_osd_request *req; 4117 int front_len = le32_to_cpu(hdr->front_len); 4118 int data_len = le32_to_cpu(hdr->data_len); 4119 u64 tid = le64_to_cpu(hdr->tid); 4120 4121 down_read(&osdc->lock); 4122 if (!osd_registered(osd)) { 4123 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 4124 *skip = 1; 4125 goto out_unlock_osdc; 4126 } 4127 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 4128 4129 mutex_lock(&osd->lock); 4130 req = lookup_request(&osd->o_requests, tid); 4131 if (!req) { 4132 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 4133 osd->o_osd, tid); 4134 *skip = 1; 4135 goto out_unlock_session; 4136 } 4137 4138 ceph_msg_revoke_incoming(req->r_reply); 4139 4140 if (front_len > req->r_reply->front_alloc_len) { 4141 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 4142 __func__, osd->o_osd, req->r_tid, front_len, 4143 req->r_reply->front_alloc_len); 4144 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 4145 false); 4146 if (!m) 4147 goto out_unlock_session; 4148 ceph_msg_put(req->r_reply); 4149 req->r_reply = m; 4150 } 4151 4152 if (data_len > req->r_reply->data_length) { 4153 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 4154 __func__, osd->o_osd, req->r_tid, data_len, 4155 req->r_reply->data_length); 4156 m = NULL; 4157 *skip = 1; 4158 goto out_unlock_session; 4159 } 4160 4161 m = ceph_msg_get(req->r_reply); 4162 dout("get_reply tid %lld %p\n", tid, m); 4163 4164 out_unlock_session: 4165 mutex_unlock(&osd->lock); 4166 out_unlock_osdc: 4167 up_read(&osdc->lock); 4168 return m; 4169 } 4170 4171 /* 4172 * TODO: switch to a msg-owned pagelist 4173 */ 4174 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 4175 { 4176 struct ceph_msg *m; 4177 int type = le16_to_cpu(hdr->type); 4178 u32 front_len = le32_to_cpu(hdr->front_len); 4179 u32 data_len = le32_to_cpu(hdr->data_len); 4180 4181 m = ceph_msg_new(type, front_len, GFP_NOIO, false); 4182 if (!m) 4183 return NULL; 4184 4185 if (data_len) { 4186 struct page **pages; 4187 struct ceph_osd_data osd_data; 4188 4189 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 4190 GFP_NOIO); 4191 if (!pages) { 4192 ceph_msg_put(m); 4193 return NULL; 4194 } 4195 4196 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false, 4197 false); 4198 ceph_osdc_msg_data_add(m, &osd_data); 4199 } 4200 4201 return m; 4202 } 4203 4204 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 4205 struct ceph_msg_header *hdr, 4206 int *skip) 4207 { 4208 struct ceph_osd *osd = con->private; 4209 int type = le16_to_cpu(hdr->type); 4210 4211 *skip = 0; 4212 switch (type) { 4213 case CEPH_MSG_OSD_MAP: 4214 case CEPH_MSG_WATCH_NOTIFY: 4215 return alloc_msg_with_page_vector(hdr); 4216 case CEPH_MSG_OSD_OPREPLY: 4217 return get_reply(con, hdr, skip); 4218 default: 4219 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 4220 osd->o_osd, type); 4221 *skip = 1; 4222 return NULL; 4223 } 4224 } 4225 4226 /* 4227 * Wrappers to refcount containing ceph_osd struct 4228 */ 4229 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 4230 { 4231 struct ceph_osd *osd = con->private; 4232 if (get_osd(osd)) 4233 return con; 4234 return NULL; 4235 } 4236 4237 static void put_osd_con(struct ceph_connection *con) 4238 { 4239 struct ceph_osd *osd = con->private; 4240 put_osd(osd); 4241 } 4242 4243 /* 4244 * authentication 4245 */ 4246 /* 4247 * Note: returned pointer is the address of a structure that's 4248 * managed separately. Caller must *not* attempt to free it. 4249 */ 4250 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 4251 int *proto, int force_new) 4252 { 4253 struct ceph_osd *o = con->private; 4254 struct ceph_osd_client *osdc = o->o_osdc; 4255 struct ceph_auth_client *ac = osdc->client->monc.auth; 4256 struct ceph_auth_handshake *auth = &o->o_auth; 4257 4258 if (force_new && auth->authorizer) { 4259 ceph_auth_destroy_authorizer(auth->authorizer); 4260 auth->authorizer = NULL; 4261 } 4262 if (!auth->authorizer) { 4263 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4264 auth); 4265 if (ret) 4266 return ERR_PTR(ret); 4267 } else { 4268 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4269 auth); 4270 if (ret) 4271 return ERR_PTR(ret); 4272 } 4273 *proto = ac->protocol; 4274 4275 return auth; 4276 } 4277 4278 4279 static int verify_authorizer_reply(struct ceph_connection *con, int len) 4280 { 4281 struct ceph_osd *o = con->private; 4282 struct ceph_osd_client *osdc = o->o_osdc; 4283 struct ceph_auth_client *ac = osdc->client->monc.auth; 4284 4285 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); 4286 } 4287 4288 static int invalidate_authorizer(struct ceph_connection *con) 4289 { 4290 struct ceph_osd *o = con->private; 4291 struct ceph_osd_client *osdc = o->o_osdc; 4292 struct ceph_auth_client *ac = osdc->client->monc.auth; 4293 4294 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 4295 return ceph_monc_validate_auth(&osdc->client->monc); 4296 } 4297 4298 static int osd_sign_message(struct ceph_msg *msg) 4299 { 4300 struct ceph_osd *o = msg->con->private; 4301 struct ceph_auth_handshake *auth = &o->o_auth; 4302 4303 return ceph_auth_sign_message(auth, msg); 4304 } 4305 4306 static int osd_check_message_signature(struct ceph_msg *msg) 4307 { 4308 struct ceph_osd *o = msg->con->private; 4309 struct ceph_auth_handshake *auth = &o->o_auth; 4310 4311 return ceph_auth_check_message_signature(auth, msg); 4312 } 4313 4314 static const struct ceph_connection_operations osd_con_ops = { 4315 .get = get_osd_con, 4316 .put = put_osd_con, 4317 .dispatch = dispatch, 4318 .get_authorizer = get_authorizer, 4319 .verify_authorizer_reply = verify_authorizer_reply, 4320 .invalidate_authorizer = invalidate_authorizer, 4321 .alloc_msg = alloc_msg, 4322 .sign_message = osd_sign_message, 4323 .check_message_signature = osd_check_message_signature, 4324 .fault = osd_fault, 4325 }; 4326