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/ceph_features.h> 16 #include <linux/ceph/libceph.h> 17 #include <linux/ceph/osd_client.h> 18 #include <linux/ceph/messenger.h> 19 #include <linux/ceph/decode.h> 20 #include <linux/ceph/auth.h> 21 #include <linux/ceph/pagelist.h> 22 23 #define OSD_OPREPLY_FRONT_LEN 512 24 25 static struct kmem_cache *ceph_osd_request_cache; 26 27 static const struct ceph_connection_operations osd_con_ops; 28 29 /* 30 * Implement client access to distributed object storage cluster. 31 * 32 * All data objects are stored within a cluster/cloud of OSDs, or 33 * "object storage devices." (Note that Ceph OSDs have _nothing_ to 34 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply 35 * remote daemons serving up and coordinating consistent and safe 36 * access to storage. 37 * 38 * Cluster membership and the mapping of data objects onto storage devices 39 * are described by the osd map. 40 * 41 * We keep track of pending OSD requests (read, write), resubmit 42 * requests to different OSDs when the cluster topology/data layout 43 * change, or retry the affected requests when the communications 44 * channel with an OSD is reset. 45 */ 46 47 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req); 48 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req); 49 static void link_linger(struct ceph_osd *osd, 50 struct ceph_osd_linger_request *lreq); 51 static void unlink_linger(struct ceph_osd *osd, 52 struct ceph_osd_linger_request *lreq); 53 static void clear_backoffs(struct ceph_osd *osd); 54 55 #if 1 56 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem) 57 { 58 bool wrlocked = true; 59 60 if (unlikely(down_read_trylock(sem))) { 61 wrlocked = false; 62 up_read(sem); 63 } 64 65 return wrlocked; 66 } 67 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) 68 { 69 WARN_ON(!rwsem_is_locked(&osdc->lock)); 70 } 71 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) 72 { 73 WARN_ON(!rwsem_is_wrlocked(&osdc->lock)); 74 } 75 static inline void verify_osd_locked(struct ceph_osd *osd) 76 { 77 struct ceph_osd_client *osdc = osd->o_osdc; 78 79 WARN_ON(!(mutex_is_locked(&osd->lock) && 80 rwsem_is_locked(&osdc->lock)) && 81 !rwsem_is_wrlocked(&osdc->lock)); 82 } 83 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) 84 { 85 WARN_ON(!mutex_is_locked(&lreq->lock)); 86 } 87 #else 88 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { } 89 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { } 90 static inline void verify_osd_locked(struct ceph_osd *osd) { } 91 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { } 92 #endif 93 94 /* 95 * calculate the mapping of a file extent onto an object, and fill out the 96 * request accordingly. shorten extent as necessary if it crosses an 97 * object boundary. 98 * 99 * fill osd op in request message. 100 */ 101 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, 102 u64 *objnum, u64 *objoff, u64 *objlen) 103 { 104 u64 orig_len = *plen; 105 int r; 106 107 /* object extent? */ 108 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum, 109 objoff, objlen); 110 if (r < 0) 111 return r; 112 if (*objlen < orig_len) { 113 *plen = *objlen; 114 dout(" skipping last %llu, final file extent %llu~%llu\n", 115 orig_len - *plen, off, *plen); 116 } 117 118 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); 119 120 return 0; 121 } 122 123 static void ceph_osd_data_init(struct ceph_osd_data *osd_data) 124 { 125 memset(osd_data, 0, sizeof (*osd_data)); 126 osd_data->type = CEPH_OSD_DATA_TYPE_NONE; 127 } 128 129 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data, 130 struct page **pages, u64 length, u32 alignment, 131 bool pages_from_pool, bool own_pages) 132 { 133 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; 134 osd_data->pages = pages; 135 osd_data->length = length; 136 osd_data->alignment = alignment; 137 osd_data->pages_from_pool = pages_from_pool; 138 osd_data->own_pages = own_pages; 139 } 140 141 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, 142 struct ceph_pagelist *pagelist) 143 { 144 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST; 145 osd_data->pagelist = pagelist; 146 } 147 148 #ifdef CONFIG_BLOCK 149 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, 150 struct bio *bio, size_t bio_length) 151 { 152 osd_data->type = CEPH_OSD_DATA_TYPE_BIO; 153 osd_data->bio = bio; 154 osd_data->bio_length = bio_length; 155 } 156 #endif /* CONFIG_BLOCK */ 157 158 #define osd_req_op_data(oreq, whch, typ, fld) \ 159 ({ \ 160 struct ceph_osd_request *__oreq = (oreq); \ 161 unsigned int __whch = (whch); \ 162 BUG_ON(__whch >= __oreq->r_num_ops); \ 163 &__oreq->r_ops[__whch].typ.fld; \ 164 }) 165 166 static struct ceph_osd_data * 167 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) 168 { 169 BUG_ON(which >= osd_req->r_num_ops); 170 171 return &osd_req->r_ops[which].raw_data_in; 172 } 173 174 struct ceph_osd_data * 175 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, 176 unsigned int which) 177 { 178 return osd_req_op_data(osd_req, which, extent, osd_data); 179 } 180 EXPORT_SYMBOL(osd_req_op_extent_osd_data); 181 182 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, 183 unsigned int which, struct page **pages, 184 u64 length, u32 alignment, 185 bool pages_from_pool, bool own_pages) 186 { 187 struct ceph_osd_data *osd_data; 188 189 osd_data = osd_req_op_raw_data_in(osd_req, which); 190 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 191 pages_from_pool, own_pages); 192 } 193 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); 194 195 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, 196 unsigned int which, struct page **pages, 197 u64 length, u32 alignment, 198 bool pages_from_pool, bool own_pages) 199 { 200 struct ceph_osd_data *osd_data; 201 202 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 203 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 204 pages_from_pool, own_pages); 205 } 206 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); 207 208 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, 209 unsigned int which, struct ceph_pagelist *pagelist) 210 { 211 struct ceph_osd_data *osd_data; 212 213 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 214 ceph_osd_data_pagelist_init(osd_data, pagelist); 215 } 216 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); 217 218 #ifdef CONFIG_BLOCK 219 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 220 unsigned int which, struct bio *bio, size_t bio_length) 221 { 222 struct ceph_osd_data *osd_data; 223 224 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 225 ceph_osd_data_bio_init(osd_data, bio, bio_length); 226 } 227 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); 228 #endif /* CONFIG_BLOCK */ 229 230 static void osd_req_op_cls_request_info_pagelist( 231 struct ceph_osd_request *osd_req, 232 unsigned int which, struct ceph_pagelist *pagelist) 233 { 234 struct ceph_osd_data *osd_data; 235 236 osd_data = osd_req_op_data(osd_req, which, cls, request_info); 237 ceph_osd_data_pagelist_init(osd_data, pagelist); 238 } 239 240 void osd_req_op_cls_request_data_pagelist( 241 struct ceph_osd_request *osd_req, 242 unsigned int which, struct ceph_pagelist *pagelist) 243 { 244 struct ceph_osd_data *osd_data; 245 246 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 247 ceph_osd_data_pagelist_init(osd_data, pagelist); 248 osd_req->r_ops[which].cls.indata_len += pagelist->length; 249 osd_req->r_ops[which].indata_len += pagelist->length; 250 } 251 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); 252 253 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, 254 unsigned int which, struct page **pages, u64 length, 255 u32 alignment, bool pages_from_pool, bool own_pages) 256 { 257 struct ceph_osd_data *osd_data; 258 259 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 260 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 261 pages_from_pool, own_pages); 262 osd_req->r_ops[which].cls.indata_len += length; 263 osd_req->r_ops[which].indata_len += length; 264 } 265 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); 266 267 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, 268 unsigned int which, struct page **pages, u64 length, 269 u32 alignment, bool pages_from_pool, bool own_pages) 270 { 271 struct ceph_osd_data *osd_data; 272 273 osd_data = osd_req_op_data(osd_req, which, cls, response_data); 274 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 275 pages_from_pool, own_pages); 276 } 277 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); 278 279 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) 280 { 281 switch (osd_data->type) { 282 case CEPH_OSD_DATA_TYPE_NONE: 283 return 0; 284 case CEPH_OSD_DATA_TYPE_PAGES: 285 return osd_data->length; 286 case CEPH_OSD_DATA_TYPE_PAGELIST: 287 return (u64)osd_data->pagelist->length; 288 #ifdef CONFIG_BLOCK 289 case CEPH_OSD_DATA_TYPE_BIO: 290 return (u64)osd_data->bio_length; 291 #endif /* CONFIG_BLOCK */ 292 default: 293 WARN(true, "unrecognized data type %d\n", (int)osd_data->type); 294 return 0; 295 } 296 } 297 298 static void ceph_osd_data_release(struct ceph_osd_data *osd_data) 299 { 300 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { 301 int num_pages; 302 303 num_pages = calc_pages_for((u64)osd_data->alignment, 304 (u64)osd_data->length); 305 ceph_release_page_vector(osd_data->pages, num_pages); 306 } 307 ceph_osd_data_init(osd_data); 308 } 309 310 static void osd_req_op_data_release(struct ceph_osd_request *osd_req, 311 unsigned int which) 312 { 313 struct ceph_osd_req_op *op; 314 315 BUG_ON(which >= osd_req->r_num_ops); 316 op = &osd_req->r_ops[which]; 317 318 switch (op->op) { 319 case CEPH_OSD_OP_READ: 320 case CEPH_OSD_OP_WRITE: 321 case CEPH_OSD_OP_WRITEFULL: 322 ceph_osd_data_release(&op->extent.osd_data); 323 break; 324 case CEPH_OSD_OP_CALL: 325 ceph_osd_data_release(&op->cls.request_info); 326 ceph_osd_data_release(&op->cls.request_data); 327 ceph_osd_data_release(&op->cls.response_data); 328 break; 329 case CEPH_OSD_OP_SETXATTR: 330 case CEPH_OSD_OP_CMPXATTR: 331 ceph_osd_data_release(&op->xattr.osd_data); 332 break; 333 case CEPH_OSD_OP_STAT: 334 ceph_osd_data_release(&op->raw_data_in); 335 break; 336 case CEPH_OSD_OP_NOTIFY_ACK: 337 ceph_osd_data_release(&op->notify_ack.request_data); 338 break; 339 case CEPH_OSD_OP_NOTIFY: 340 ceph_osd_data_release(&op->notify.request_data); 341 ceph_osd_data_release(&op->notify.response_data); 342 break; 343 case CEPH_OSD_OP_LIST_WATCHERS: 344 ceph_osd_data_release(&op->list_watchers.response_data); 345 break; 346 default: 347 break; 348 } 349 } 350 351 /* 352 * Assumes @t is zero-initialized. 353 */ 354 static void target_init(struct ceph_osd_request_target *t) 355 { 356 ceph_oid_init(&t->base_oid); 357 ceph_oloc_init(&t->base_oloc); 358 ceph_oid_init(&t->target_oid); 359 ceph_oloc_init(&t->target_oloc); 360 361 ceph_osds_init(&t->acting); 362 ceph_osds_init(&t->up); 363 t->size = -1; 364 t->min_size = -1; 365 366 t->osd = CEPH_HOMELESS_OSD; 367 } 368 369 static void target_copy(struct ceph_osd_request_target *dest, 370 const struct ceph_osd_request_target *src) 371 { 372 ceph_oid_copy(&dest->base_oid, &src->base_oid); 373 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc); 374 ceph_oid_copy(&dest->target_oid, &src->target_oid); 375 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc); 376 377 dest->pgid = src->pgid; /* struct */ 378 dest->spgid = src->spgid; /* struct */ 379 dest->pg_num = src->pg_num; 380 dest->pg_num_mask = src->pg_num_mask; 381 ceph_osds_copy(&dest->acting, &src->acting); 382 ceph_osds_copy(&dest->up, &src->up); 383 dest->size = src->size; 384 dest->min_size = src->min_size; 385 dest->sort_bitwise = src->sort_bitwise; 386 387 dest->flags = src->flags; 388 dest->paused = src->paused; 389 390 dest->epoch = src->epoch; 391 dest->last_force_resend = src->last_force_resend; 392 393 dest->osd = src->osd; 394 } 395 396 static void target_destroy(struct ceph_osd_request_target *t) 397 { 398 ceph_oid_destroy(&t->base_oid); 399 ceph_oloc_destroy(&t->base_oloc); 400 ceph_oid_destroy(&t->target_oid); 401 ceph_oloc_destroy(&t->target_oloc); 402 } 403 404 /* 405 * requests 406 */ 407 static void request_release_checks(struct ceph_osd_request *req) 408 { 409 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 410 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node)); 411 WARN_ON(!list_empty(&req->r_unsafe_item)); 412 WARN_ON(req->r_osd); 413 } 414 415 static void ceph_osdc_release_request(struct kref *kref) 416 { 417 struct ceph_osd_request *req = container_of(kref, 418 struct ceph_osd_request, r_kref); 419 unsigned int which; 420 421 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 422 req->r_request, req->r_reply); 423 request_release_checks(req); 424 425 if (req->r_request) 426 ceph_msg_put(req->r_request); 427 if (req->r_reply) 428 ceph_msg_put(req->r_reply); 429 430 for (which = 0; which < req->r_num_ops; which++) 431 osd_req_op_data_release(req, which); 432 433 target_destroy(&req->r_t); 434 ceph_put_snap_context(req->r_snapc); 435 436 if (req->r_mempool) 437 mempool_free(req, req->r_osdc->req_mempool); 438 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) 439 kmem_cache_free(ceph_osd_request_cache, req); 440 else 441 kfree(req); 442 } 443 444 void ceph_osdc_get_request(struct ceph_osd_request *req) 445 { 446 dout("%s %p (was %d)\n", __func__, req, 447 kref_read(&req->r_kref)); 448 kref_get(&req->r_kref); 449 } 450 EXPORT_SYMBOL(ceph_osdc_get_request); 451 452 void ceph_osdc_put_request(struct ceph_osd_request *req) 453 { 454 if (req) { 455 dout("%s %p (was %d)\n", __func__, req, 456 kref_read(&req->r_kref)); 457 kref_put(&req->r_kref, ceph_osdc_release_request); 458 } 459 } 460 EXPORT_SYMBOL(ceph_osdc_put_request); 461 462 static void request_init(struct ceph_osd_request *req) 463 { 464 /* req only, each op is zeroed in _osd_req_op_init() */ 465 memset(req, 0, sizeof(*req)); 466 467 kref_init(&req->r_kref); 468 init_completion(&req->r_completion); 469 RB_CLEAR_NODE(&req->r_node); 470 RB_CLEAR_NODE(&req->r_mc_node); 471 INIT_LIST_HEAD(&req->r_unsafe_item); 472 473 target_init(&req->r_t); 474 } 475 476 /* 477 * This is ugly, but it allows us to reuse linger registration and ping 478 * requests, keeping the structure of the code around send_linger{_ping}() 479 * reasonable. Setting up a min_nr=2 mempool for each linger request 480 * and dealing with copying ops (this blasts req only, watch op remains 481 * intact) isn't any better. 482 */ 483 static void request_reinit(struct ceph_osd_request *req) 484 { 485 struct ceph_osd_client *osdc = req->r_osdc; 486 bool mempool = req->r_mempool; 487 unsigned int num_ops = req->r_num_ops; 488 u64 snapid = req->r_snapid; 489 struct ceph_snap_context *snapc = req->r_snapc; 490 bool linger = req->r_linger; 491 struct ceph_msg *request_msg = req->r_request; 492 struct ceph_msg *reply_msg = req->r_reply; 493 494 dout("%s req %p\n", __func__, req); 495 WARN_ON(kref_read(&req->r_kref) != 1); 496 request_release_checks(req); 497 498 WARN_ON(kref_read(&request_msg->kref) != 1); 499 WARN_ON(kref_read(&reply_msg->kref) != 1); 500 target_destroy(&req->r_t); 501 502 request_init(req); 503 req->r_osdc = osdc; 504 req->r_mempool = mempool; 505 req->r_num_ops = num_ops; 506 req->r_snapid = snapid; 507 req->r_snapc = snapc; 508 req->r_linger = linger; 509 req->r_request = request_msg; 510 req->r_reply = reply_msg; 511 } 512 513 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 514 struct ceph_snap_context *snapc, 515 unsigned int num_ops, 516 bool use_mempool, 517 gfp_t gfp_flags) 518 { 519 struct ceph_osd_request *req; 520 521 if (use_mempool) { 522 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 523 req = mempool_alloc(osdc->req_mempool, gfp_flags); 524 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 525 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 526 } else { 527 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 528 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]), 529 gfp_flags); 530 } 531 if (unlikely(!req)) 532 return NULL; 533 534 request_init(req); 535 req->r_osdc = osdc; 536 req->r_mempool = use_mempool; 537 req->r_num_ops = num_ops; 538 req->r_snapid = CEPH_NOSNAP; 539 req->r_snapc = ceph_get_snap_context(snapc); 540 541 dout("%s req %p\n", __func__, req); 542 return req; 543 } 544 EXPORT_SYMBOL(ceph_osdc_alloc_request); 545 546 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc) 547 { 548 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); 549 } 550 551 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 552 { 553 struct ceph_osd_client *osdc = req->r_osdc; 554 struct ceph_msg *msg; 555 int msg_size; 556 557 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 558 WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); 559 560 /* create request message */ 561 msg_size = CEPH_ENCODING_START_BLK_LEN + 562 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 563 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */ 564 msg_size += CEPH_ENCODING_START_BLK_LEN + 565 sizeof(struct ceph_osd_reqid); /* reqid */ 566 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */ 567 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */ 568 msg_size += CEPH_ENCODING_START_BLK_LEN + 569 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 570 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 571 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 572 msg_size += 8; /* snapid */ 573 msg_size += 8; /* snap_seq */ 574 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 575 msg_size += 4 + 8; /* retry_attempt, features */ 576 577 if (req->r_mempool) 578 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 579 else 580 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true); 581 if (!msg) 582 return -ENOMEM; 583 584 memset(msg->front.iov_base, 0, msg->front.iov_len); 585 req->r_request = msg; 586 587 /* create reply message */ 588 msg_size = OSD_OPREPLY_FRONT_LEN; 589 msg_size += req->r_base_oid.name_len; 590 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 591 592 if (req->r_mempool) 593 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 594 else 595 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true); 596 if (!msg) 597 return -ENOMEM; 598 599 req->r_reply = msg; 600 601 return 0; 602 } 603 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 604 605 static bool osd_req_opcode_valid(u16 opcode) 606 { 607 switch (opcode) { 608 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 609 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 610 #undef GENERATE_CASE 611 default: 612 return false; 613 } 614 } 615 616 /* 617 * This is an osd op init function for opcodes that have no data or 618 * other information associated with them. It also serves as a 619 * common init routine for all the other init functions, below. 620 */ 621 static struct ceph_osd_req_op * 622 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 623 u16 opcode, u32 flags) 624 { 625 struct ceph_osd_req_op *op; 626 627 BUG_ON(which >= osd_req->r_num_ops); 628 BUG_ON(!osd_req_opcode_valid(opcode)); 629 630 op = &osd_req->r_ops[which]; 631 memset(op, 0, sizeof (*op)); 632 op->op = opcode; 633 op->flags = flags; 634 635 return op; 636 } 637 638 void osd_req_op_init(struct ceph_osd_request *osd_req, 639 unsigned int which, u16 opcode, u32 flags) 640 { 641 (void)_osd_req_op_init(osd_req, which, opcode, flags); 642 } 643 EXPORT_SYMBOL(osd_req_op_init); 644 645 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 646 unsigned int which, u16 opcode, 647 u64 offset, u64 length, 648 u64 truncate_size, u32 truncate_seq) 649 { 650 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 651 opcode, 0); 652 size_t payload_len = 0; 653 654 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 655 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 656 opcode != CEPH_OSD_OP_TRUNCATE); 657 658 op->extent.offset = offset; 659 op->extent.length = length; 660 op->extent.truncate_size = truncate_size; 661 op->extent.truncate_seq = truncate_seq; 662 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 663 payload_len += length; 664 665 op->indata_len = payload_len; 666 } 667 EXPORT_SYMBOL(osd_req_op_extent_init); 668 669 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 670 unsigned int which, u64 length) 671 { 672 struct ceph_osd_req_op *op; 673 u64 previous; 674 675 BUG_ON(which >= osd_req->r_num_ops); 676 op = &osd_req->r_ops[which]; 677 previous = op->extent.length; 678 679 if (length == previous) 680 return; /* Nothing to do */ 681 BUG_ON(length > previous); 682 683 op->extent.length = length; 684 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 685 op->indata_len -= previous - length; 686 } 687 EXPORT_SYMBOL(osd_req_op_extent_update); 688 689 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 690 unsigned int which, u64 offset_inc) 691 { 692 struct ceph_osd_req_op *op, *prev_op; 693 694 BUG_ON(which + 1 >= osd_req->r_num_ops); 695 696 prev_op = &osd_req->r_ops[which]; 697 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 698 /* dup previous one */ 699 op->indata_len = prev_op->indata_len; 700 op->outdata_len = prev_op->outdata_len; 701 op->extent = prev_op->extent; 702 /* adjust offset */ 703 op->extent.offset += offset_inc; 704 op->extent.length -= offset_inc; 705 706 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 707 op->indata_len -= offset_inc; 708 } 709 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 710 711 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 712 u16 opcode, const char *class, const char *method) 713 { 714 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 715 opcode, 0); 716 struct ceph_pagelist *pagelist; 717 size_t payload_len = 0; 718 size_t size; 719 720 BUG_ON(opcode != CEPH_OSD_OP_CALL); 721 722 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 723 BUG_ON(!pagelist); 724 ceph_pagelist_init(pagelist); 725 726 op->cls.class_name = class; 727 size = strlen(class); 728 BUG_ON(size > (size_t) U8_MAX); 729 op->cls.class_len = size; 730 ceph_pagelist_append(pagelist, class, size); 731 payload_len += size; 732 733 op->cls.method_name = method; 734 size = strlen(method); 735 BUG_ON(size > (size_t) U8_MAX); 736 op->cls.method_len = size; 737 ceph_pagelist_append(pagelist, method, size); 738 payload_len += size; 739 740 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 741 742 op->indata_len = payload_len; 743 } 744 EXPORT_SYMBOL(osd_req_op_cls_init); 745 746 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 747 u16 opcode, const char *name, const void *value, 748 size_t size, u8 cmp_op, u8 cmp_mode) 749 { 750 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 751 opcode, 0); 752 struct ceph_pagelist *pagelist; 753 size_t payload_len; 754 755 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 756 757 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 758 if (!pagelist) 759 return -ENOMEM; 760 761 ceph_pagelist_init(pagelist); 762 763 payload_len = strlen(name); 764 op->xattr.name_len = payload_len; 765 ceph_pagelist_append(pagelist, name, payload_len); 766 767 op->xattr.value_len = size; 768 ceph_pagelist_append(pagelist, value, size); 769 payload_len += size; 770 771 op->xattr.cmp_op = cmp_op; 772 op->xattr.cmp_mode = cmp_mode; 773 774 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 775 op->indata_len = payload_len; 776 return 0; 777 } 778 EXPORT_SYMBOL(osd_req_op_xattr_init); 779 780 /* 781 * @watch_opcode: CEPH_OSD_WATCH_OP_* 782 */ 783 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 784 u64 cookie, u8 watch_opcode) 785 { 786 struct ceph_osd_req_op *op; 787 788 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 789 op->watch.cookie = cookie; 790 op->watch.op = watch_opcode; 791 op->watch.gen = 0; 792 } 793 794 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 795 unsigned int which, 796 u64 expected_object_size, 797 u64 expected_write_size) 798 { 799 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 800 CEPH_OSD_OP_SETALLOCHINT, 801 0); 802 803 op->alloc_hint.expected_object_size = expected_object_size; 804 op->alloc_hint.expected_write_size = expected_write_size; 805 806 /* 807 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 808 * not worth a feature bit. Set FAILOK per-op flag to make 809 * sure older osds don't trip over an unsupported opcode. 810 */ 811 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 812 } 813 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 814 815 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 816 struct ceph_osd_data *osd_data) 817 { 818 u64 length = ceph_osd_data_length(osd_data); 819 820 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 821 BUG_ON(length > (u64) SIZE_MAX); 822 if (length) 823 ceph_msg_data_add_pages(msg, osd_data->pages, 824 length, osd_data->alignment); 825 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 826 BUG_ON(!length); 827 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 828 #ifdef CONFIG_BLOCK 829 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 830 ceph_msg_data_add_bio(msg, osd_data->bio, length); 831 #endif 832 } else { 833 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 834 } 835 } 836 837 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 838 const struct ceph_osd_req_op *src) 839 { 840 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 841 pr_err("unrecognized osd opcode %d\n", src->op); 842 843 return 0; 844 } 845 846 switch (src->op) { 847 case CEPH_OSD_OP_STAT: 848 break; 849 case CEPH_OSD_OP_READ: 850 case CEPH_OSD_OP_WRITE: 851 case CEPH_OSD_OP_WRITEFULL: 852 case CEPH_OSD_OP_ZERO: 853 case CEPH_OSD_OP_TRUNCATE: 854 dst->extent.offset = cpu_to_le64(src->extent.offset); 855 dst->extent.length = cpu_to_le64(src->extent.length); 856 dst->extent.truncate_size = 857 cpu_to_le64(src->extent.truncate_size); 858 dst->extent.truncate_seq = 859 cpu_to_le32(src->extent.truncate_seq); 860 break; 861 case CEPH_OSD_OP_CALL: 862 dst->cls.class_len = src->cls.class_len; 863 dst->cls.method_len = src->cls.method_len; 864 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 865 break; 866 case CEPH_OSD_OP_STARTSYNC: 867 break; 868 case CEPH_OSD_OP_WATCH: 869 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 870 dst->watch.ver = cpu_to_le64(0); 871 dst->watch.op = src->watch.op; 872 dst->watch.gen = cpu_to_le32(src->watch.gen); 873 break; 874 case CEPH_OSD_OP_NOTIFY_ACK: 875 break; 876 case CEPH_OSD_OP_NOTIFY: 877 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 878 break; 879 case CEPH_OSD_OP_LIST_WATCHERS: 880 break; 881 case CEPH_OSD_OP_SETALLOCHINT: 882 dst->alloc_hint.expected_object_size = 883 cpu_to_le64(src->alloc_hint.expected_object_size); 884 dst->alloc_hint.expected_write_size = 885 cpu_to_le64(src->alloc_hint.expected_write_size); 886 break; 887 case CEPH_OSD_OP_SETXATTR: 888 case CEPH_OSD_OP_CMPXATTR: 889 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 890 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 891 dst->xattr.cmp_op = src->xattr.cmp_op; 892 dst->xattr.cmp_mode = src->xattr.cmp_mode; 893 break; 894 case CEPH_OSD_OP_CREATE: 895 case CEPH_OSD_OP_DELETE: 896 break; 897 default: 898 pr_err("unsupported osd opcode %s\n", 899 ceph_osd_op_name(src->op)); 900 WARN_ON(1); 901 902 return 0; 903 } 904 905 dst->op = cpu_to_le16(src->op); 906 dst->flags = cpu_to_le32(src->flags); 907 dst->payload_len = cpu_to_le32(src->indata_len); 908 909 return src->indata_len; 910 } 911 912 /* 913 * build new request AND message, calculate layout, and adjust file 914 * extent as needed. 915 * 916 * if the file was recently truncated, we include information about its 917 * old and new size so that the object can be updated appropriately. (we 918 * avoid synchronously deleting truncated objects because it's slow.) 919 * 920 * if @do_sync, include a 'startsync' command so that the osd will flush 921 * data quickly. 922 */ 923 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 924 struct ceph_file_layout *layout, 925 struct ceph_vino vino, 926 u64 off, u64 *plen, 927 unsigned int which, int num_ops, 928 int opcode, int flags, 929 struct ceph_snap_context *snapc, 930 u32 truncate_seq, 931 u64 truncate_size, 932 bool use_mempool) 933 { 934 struct ceph_osd_request *req; 935 u64 objnum = 0; 936 u64 objoff = 0; 937 u64 objlen = 0; 938 int r; 939 940 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 941 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 942 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 943 944 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 945 GFP_NOFS); 946 if (!req) { 947 r = -ENOMEM; 948 goto fail; 949 } 950 951 /* calculate max write size */ 952 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 953 if (r) 954 goto fail; 955 956 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 957 osd_req_op_init(req, which, opcode, 0); 958 } else { 959 u32 object_size = layout->object_size; 960 u32 object_base = off - objoff; 961 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 962 if (truncate_size <= object_base) { 963 truncate_size = 0; 964 } else { 965 truncate_size -= object_base; 966 if (truncate_size > object_size) 967 truncate_size = object_size; 968 } 969 } 970 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 971 truncate_size, truncate_seq); 972 } 973 974 req->r_abort_on_full = true; 975 req->r_flags = flags; 976 req->r_base_oloc.pool = layout->pool_id; 977 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); 978 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 979 980 req->r_snapid = vino.snap; 981 if (flags & CEPH_OSD_FLAG_WRITE) 982 req->r_data_offset = off; 983 984 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 985 if (r) 986 goto fail; 987 988 return req; 989 990 fail: 991 ceph_osdc_put_request(req); 992 return ERR_PTR(r); 993 } 994 EXPORT_SYMBOL(ceph_osdc_new_request); 995 996 /* 997 * We keep osd requests in an rbtree, sorted by ->r_tid. 998 */ 999 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 1000 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 1001 1002 static bool osd_homeless(struct ceph_osd *osd) 1003 { 1004 return osd->o_osd == CEPH_HOMELESS_OSD; 1005 } 1006 1007 static bool osd_registered(struct ceph_osd *osd) 1008 { 1009 verify_osdc_locked(osd->o_osdc); 1010 1011 return !RB_EMPTY_NODE(&osd->o_node); 1012 } 1013 1014 /* 1015 * Assumes @osd is zero-initialized. 1016 */ 1017 static void osd_init(struct ceph_osd *osd) 1018 { 1019 refcount_set(&osd->o_ref, 1); 1020 RB_CLEAR_NODE(&osd->o_node); 1021 osd->o_requests = RB_ROOT; 1022 osd->o_linger_requests = RB_ROOT; 1023 osd->o_backoff_mappings = RB_ROOT; 1024 osd->o_backoffs_by_id = RB_ROOT; 1025 INIT_LIST_HEAD(&osd->o_osd_lru); 1026 INIT_LIST_HEAD(&osd->o_keepalive_item); 1027 osd->o_incarnation = 1; 1028 mutex_init(&osd->lock); 1029 } 1030 1031 static void osd_cleanup(struct ceph_osd *osd) 1032 { 1033 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1034 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1035 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1036 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings)); 1037 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id)); 1038 WARN_ON(!list_empty(&osd->o_osd_lru)); 1039 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1040 1041 if (osd->o_auth.authorizer) { 1042 WARN_ON(osd_homeless(osd)); 1043 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1044 } 1045 } 1046 1047 /* 1048 * Track open sessions with osds. 1049 */ 1050 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1051 { 1052 struct ceph_osd *osd; 1053 1054 WARN_ON(onum == CEPH_HOMELESS_OSD); 1055 1056 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1057 osd_init(osd); 1058 osd->o_osdc = osdc; 1059 osd->o_osd = onum; 1060 1061 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1062 1063 return osd; 1064 } 1065 1066 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1067 { 1068 if (refcount_inc_not_zero(&osd->o_ref)) { 1069 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1, 1070 refcount_read(&osd->o_ref)); 1071 return osd; 1072 } else { 1073 dout("get_osd %p FAIL\n", osd); 1074 return NULL; 1075 } 1076 } 1077 1078 static void put_osd(struct ceph_osd *osd) 1079 { 1080 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref), 1081 refcount_read(&osd->o_ref) - 1); 1082 if (refcount_dec_and_test(&osd->o_ref)) { 1083 osd_cleanup(osd); 1084 kfree(osd); 1085 } 1086 } 1087 1088 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1089 1090 static void __move_osd_to_lru(struct ceph_osd *osd) 1091 { 1092 struct ceph_osd_client *osdc = osd->o_osdc; 1093 1094 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1095 BUG_ON(!list_empty(&osd->o_osd_lru)); 1096 1097 spin_lock(&osdc->osd_lru_lock); 1098 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1099 spin_unlock(&osdc->osd_lru_lock); 1100 1101 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1102 } 1103 1104 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1105 { 1106 if (RB_EMPTY_ROOT(&osd->o_requests) && 1107 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1108 __move_osd_to_lru(osd); 1109 } 1110 1111 static void __remove_osd_from_lru(struct ceph_osd *osd) 1112 { 1113 struct ceph_osd_client *osdc = osd->o_osdc; 1114 1115 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1116 1117 spin_lock(&osdc->osd_lru_lock); 1118 if (!list_empty(&osd->o_osd_lru)) 1119 list_del_init(&osd->o_osd_lru); 1120 spin_unlock(&osdc->osd_lru_lock); 1121 } 1122 1123 /* 1124 * Close the connection and assign any leftover requests to the 1125 * homeless session. 1126 */ 1127 static void close_osd(struct ceph_osd *osd) 1128 { 1129 struct ceph_osd_client *osdc = osd->o_osdc; 1130 struct rb_node *n; 1131 1132 verify_osdc_wrlocked(osdc); 1133 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1134 1135 ceph_con_close(&osd->o_con); 1136 1137 for (n = rb_first(&osd->o_requests); n; ) { 1138 struct ceph_osd_request *req = 1139 rb_entry(n, struct ceph_osd_request, r_node); 1140 1141 n = rb_next(n); /* unlink_request() */ 1142 1143 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1144 unlink_request(osd, req); 1145 link_request(&osdc->homeless_osd, req); 1146 } 1147 for (n = rb_first(&osd->o_linger_requests); n; ) { 1148 struct ceph_osd_linger_request *lreq = 1149 rb_entry(n, struct ceph_osd_linger_request, node); 1150 1151 n = rb_next(n); /* unlink_linger() */ 1152 1153 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1154 lreq->linger_id); 1155 unlink_linger(osd, lreq); 1156 link_linger(&osdc->homeless_osd, lreq); 1157 } 1158 clear_backoffs(osd); 1159 1160 __remove_osd_from_lru(osd); 1161 erase_osd(&osdc->osds, osd); 1162 put_osd(osd); 1163 } 1164 1165 /* 1166 * reset osd connect 1167 */ 1168 static int reopen_osd(struct ceph_osd *osd) 1169 { 1170 struct ceph_entity_addr *peer_addr; 1171 1172 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1173 1174 if (RB_EMPTY_ROOT(&osd->o_requests) && 1175 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1176 close_osd(osd); 1177 return -ENODEV; 1178 } 1179 1180 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1181 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1182 !ceph_con_opened(&osd->o_con)) { 1183 struct rb_node *n; 1184 1185 dout("osd addr hasn't changed and connection never opened, " 1186 "letting msgr retry\n"); 1187 /* touch each r_stamp for handle_timeout()'s benfit */ 1188 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1189 struct ceph_osd_request *req = 1190 rb_entry(n, struct ceph_osd_request, r_node); 1191 req->r_stamp = jiffies; 1192 } 1193 1194 return -EAGAIN; 1195 } 1196 1197 ceph_con_close(&osd->o_con); 1198 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1199 osd->o_incarnation++; 1200 1201 return 0; 1202 } 1203 1204 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1205 bool wrlocked) 1206 { 1207 struct ceph_osd *osd; 1208 1209 if (wrlocked) 1210 verify_osdc_wrlocked(osdc); 1211 else 1212 verify_osdc_locked(osdc); 1213 1214 if (o != CEPH_HOMELESS_OSD) 1215 osd = lookup_osd(&osdc->osds, o); 1216 else 1217 osd = &osdc->homeless_osd; 1218 if (!osd) { 1219 if (!wrlocked) 1220 return ERR_PTR(-EAGAIN); 1221 1222 osd = create_osd(osdc, o); 1223 insert_osd(&osdc->osds, osd); 1224 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1225 &osdc->osdmap->osd_addr[osd->o_osd]); 1226 } 1227 1228 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1229 return osd; 1230 } 1231 1232 /* 1233 * Create request <-> OSD session relation. 1234 * 1235 * @req has to be assigned a tid, @osd may be homeless. 1236 */ 1237 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1238 { 1239 verify_osd_locked(osd); 1240 WARN_ON(!req->r_tid || req->r_osd); 1241 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1242 req, req->r_tid); 1243 1244 if (!osd_homeless(osd)) 1245 __remove_osd_from_lru(osd); 1246 else 1247 atomic_inc(&osd->o_osdc->num_homeless); 1248 1249 get_osd(osd); 1250 insert_request(&osd->o_requests, req); 1251 req->r_osd = osd; 1252 } 1253 1254 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1255 { 1256 verify_osd_locked(osd); 1257 WARN_ON(req->r_osd != osd); 1258 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1259 req, req->r_tid); 1260 1261 req->r_osd = NULL; 1262 erase_request(&osd->o_requests, req); 1263 put_osd(osd); 1264 1265 if (!osd_homeless(osd)) 1266 maybe_move_osd_to_lru(osd); 1267 else 1268 atomic_dec(&osd->o_osdc->num_homeless); 1269 } 1270 1271 static bool __pool_full(struct ceph_pg_pool_info *pi) 1272 { 1273 return pi->flags & CEPH_POOL_FLAG_FULL; 1274 } 1275 1276 static bool have_pool_full(struct ceph_osd_client *osdc) 1277 { 1278 struct rb_node *n; 1279 1280 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1281 struct ceph_pg_pool_info *pi = 1282 rb_entry(n, struct ceph_pg_pool_info, node); 1283 1284 if (__pool_full(pi)) 1285 return true; 1286 } 1287 1288 return false; 1289 } 1290 1291 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1292 { 1293 struct ceph_pg_pool_info *pi; 1294 1295 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1296 if (!pi) 1297 return false; 1298 1299 return __pool_full(pi); 1300 } 1301 1302 /* 1303 * Returns whether a request should be blocked from being sent 1304 * based on the current osdmap and osd_client settings. 1305 */ 1306 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1307 const struct ceph_osd_request_target *t, 1308 struct ceph_pg_pool_info *pi) 1309 { 1310 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1311 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1312 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1313 __pool_full(pi); 1314 1315 WARN_ON(pi->id != t->target_oloc.pool); 1316 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) || 1317 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) || 1318 (osdc->osdmap->epoch < osdc->epoch_barrier); 1319 } 1320 1321 enum calc_target_result { 1322 CALC_TARGET_NO_ACTION = 0, 1323 CALC_TARGET_NEED_RESEND, 1324 CALC_TARGET_POOL_DNE, 1325 }; 1326 1327 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1328 struct ceph_osd_request_target *t, 1329 struct ceph_connection *con, 1330 bool any_change) 1331 { 1332 struct ceph_pg_pool_info *pi; 1333 struct ceph_pg pgid, last_pgid; 1334 struct ceph_osds up, acting; 1335 bool force_resend = false; 1336 bool unpaused = false; 1337 bool legacy_change; 1338 bool split = false; 1339 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1340 enum calc_target_result ct_res; 1341 int ret; 1342 1343 t->epoch = osdc->osdmap->epoch; 1344 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1345 if (!pi) { 1346 t->osd = CEPH_HOMELESS_OSD; 1347 ct_res = CALC_TARGET_POOL_DNE; 1348 goto out; 1349 } 1350 1351 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1352 if (t->last_force_resend < pi->last_force_request_resend) { 1353 t->last_force_resend = pi->last_force_request_resend; 1354 force_resend = true; 1355 } else if (t->last_force_resend == 0) { 1356 force_resend = true; 1357 } 1358 } 1359 1360 /* apply tiering */ 1361 ceph_oid_copy(&t->target_oid, &t->base_oid); 1362 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1363 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1364 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) 1365 t->target_oloc.pool = pi->read_tier; 1366 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) 1367 t->target_oloc.pool = pi->write_tier; 1368 1369 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool); 1370 if (!pi) { 1371 t->osd = CEPH_HOMELESS_OSD; 1372 ct_res = CALC_TARGET_POOL_DNE; 1373 goto out; 1374 } 1375 } 1376 1377 ret = __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, 1378 &pgid); 1379 if (ret) { 1380 WARN_ON(ret != -ENOENT); 1381 t->osd = CEPH_HOMELESS_OSD; 1382 ct_res = CALC_TARGET_POOL_DNE; 1383 goto out; 1384 } 1385 last_pgid.pool = pgid.pool; 1386 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1387 1388 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting); 1389 if (any_change && 1390 ceph_is_new_interval(&t->acting, 1391 &acting, 1392 &t->up, 1393 &up, 1394 t->size, 1395 pi->size, 1396 t->min_size, 1397 pi->min_size, 1398 t->pg_num, 1399 pi->pg_num, 1400 t->sort_bitwise, 1401 sort_bitwise, 1402 &last_pgid)) 1403 force_resend = true; 1404 1405 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1406 t->paused = false; 1407 unpaused = true; 1408 } 1409 legacy_change = ceph_pg_compare(&t->pgid, &pgid) || 1410 ceph_osds_changed(&t->acting, &acting, any_change); 1411 if (t->pg_num) 1412 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num); 1413 1414 if (legacy_change || force_resend || split) { 1415 t->pgid = pgid; /* struct */ 1416 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid); 1417 ceph_osds_copy(&t->acting, &acting); 1418 ceph_osds_copy(&t->up, &up); 1419 t->size = pi->size; 1420 t->min_size = pi->min_size; 1421 t->pg_num = pi->pg_num; 1422 t->pg_num_mask = pi->pg_num_mask; 1423 t->sort_bitwise = sort_bitwise; 1424 1425 t->osd = acting.primary; 1426 } 1427 1428 if (unpaused || legacy_change || force_resend || 1429 (split && con && CEPH_HAVE_FEATURE(con->peer_features, 1430 RESEND_ON_SPLIT))) 1431 ct_res = CALC_TARGET_NEED_RESEND; 1432 else 1433 ct_res = CALC_TARGET_NO_ACTION; 1434 1435 out: 1436 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd); 1437 return ct_res; 1438 } 1439 1440 static struct ceph_spg_mapping *alloc_spg_mapping(void) 1441 { 1442 struct ceph_spg_mapping *spg; 1443 1444 spg = kmalloc(sizeof(*spg), GFP_NOIO); 1445 if (!spg) 1446 return NULL; 1447 1448 RB_CLEAR_NODE(&spg->node); 1449 spg->backoffs = RB_ROOT; 1450 return spg; 1451 } 1452 1453 static void free_spg_mapping(struct ceph_spg_mapping *spg) 1454 { 1455 WARN_ON(!RB_EMPTY_NODE(&spg->node)); 1456 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs)); 1457 1458 kfree(spg); 1459 } 1460 1461 /* 1462 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to 1463 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is 1464 * defined only within a specific spgid; it does not pass anything to 1465 * children on split, or to another primary. 1466 */ 1467 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare, 1468 RB_BYPTR, const struct ceph_spg *, node) 1469 1470 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid) 1471 { 1472 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits; 1473 } 1474 1475 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid, 1476 void **pkey, size_t *pkey_len) 1477 { 1478 if (hoid->key_len) { 1479 *pkey = hoid->key; 1480 *pkey_len = hoid->key_len; 1481 } else { 1482 *pkey = hoid->oid; 1483 *pkey_len = hoid->oid_len; 1484 } 1485 } 1486 1487 static int compare_names(const void *name1, size_t name1_len, 1488 const void *name2, size_t name2_len) 1489 { 1490 int ret; 1491 1492 ret = memcmp(name1, name2, min(name1_len, name2_len)); 1493 if (!ret) { 1494 if (name1_len < name2_len) 1495 ret = -1; 1496 else if (name1_len > name2_len) 1497 ret = 1; 1498 } 1499 return ret; 1500 } 1501 1502 static int hoid_compare(const struct ceph_hobject_id *lhs, 1503 const struct ceph_hobject_id *rhs) 1504 { 1505 void *effective_key1, *effective_key2; 1506 size_t effective_key1_len, effective_key2_len; 1507 int ret; 1508 1509 if (lhs->is_max < rhs->is_max) 1510 return -1; 1511 if (lhs->is_max > rhs->is_max) 1512 return 1; 1513 1514 if (lhs->pool < rhs->pool) 1515 return -1; 1516 if (lhs->pool > rhs->pool) 1517 return 1; 1518 1519 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs)) 1520 return -1; 1521 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs)) 1522 return 1; 1523 1524 ret = compare_names(lhs->nspace, lhs->nspace_len, 1525 rhs->nspace, rhs->nspace_len); 1526 if (ret) 1527 return ret; 1528 1529 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len); 1530 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len); 1531 ret = compare_names(effective_key1, effective_key1_len, 1532 effective_key2, effective_key2_len); 1533 if (ret) 1534 return ret; 1535 1536 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len); 1537 if (ret) 1538 return ret; 1539 1540 if (lhs->snapid < rhs->snapid) 1541 return -1; 1542 if (lhs->snapid > rhs->snapid) 1543 return 1; 1544 1545 return 0; 1546 } 1547 1548 /* 1549 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX 1550 * compat stuff here. 1551 * 1552 * Assumes @hoid is zero-initialized. 1553 */ 1554 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid) 1555 { 1556 u8 struct_v; 1557 u32 struct_len; 1558 int ret; 1559 1560 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v, 1561 &struct_len); 1562 if (ret) 1563 return ret; 1564 1565 if (struct_v < 4) { 1566 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v); 1567 goto e_inval; 1568 } 1569 1570 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len, 1571 GFP_NOIO); 1572 if (IS_ERR(hoid->key)) { 1573 ret = PTR_ERR(hoid->key); 1574 hoid->key = NULL; 1575 return ret; 1576 } 1577 1578 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len, 1579 GFP_NOIO); 1580 if (IS_ERR(hoid->oid)) { 1581 ret = PTR_ERR(hoid->oid); 1582 hoid->oid = NULL; 1583 return ret; 1584 } 1585 1586 ceph_decode_64_safe(p, end, hoid->snapid, e_inval); 1587 ceph_decode_32_safe(p, end, hoid->hash, e_inval); 1588 ceph_decode_8_safe(p, end, hoid->is_max, e_inval); 1589 1590 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len, 1591 GFP_NOIO); 1592 if (IS_ERR(hoid->nspace)) { 1593 ret = PTR_ERR(hoid->nspace); 1594 hoid->nspace = NULL; 1595 return ret; 1596 } 1597 1598 ceph_decode_64_safe(p, end, hoid->pool, e_inval); 1599 1600 ceph_hoid_build_hash_cache(hoid); 1601 return 0; 1602 1603 e_inval: 1604 return -EINVAL; 1605 } 1606 1607 static int hoid_encoding_size(const struct ceph_hobject_id *hoid) 1608 { 1609 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */ 1610 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len; 1611 } 1612 1613 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid) 1614 { 1615 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid)); 1616 ceph_encode_string(p, end, hoid->key, hoid->key_len); 1617 ceph_encode_string(p, end, hoid->oid, hoid->oid_len); 1618 ceph_encode_64(p, hoid->snapid); 1619 ceph_encode_32(p, hoid->hash); 1620 ceph_encode_8(p, hoid->is_max); 1621 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len); 1622 ceph_encode_64(p, hoid->pool); 1623 } 1624 1625 static void free_hoid(struct ceph_hobject_id *hoid) 1626 { 1627 if (hoid) { 1628 kfree(hoid->key); 1629 kfree(hoid->oid); 1630 kfree(hoid->nspace); 1631 kfree(hoid); 1632 } 1633 } 1634 1635 static struct ceph_osd_backoff *alloc_backoff(void) 1636 { 1637 struct ceph_osd_backoff *backoff; 1638 1639 backoff = kzalloc(sizeof(*backoff), GFP_NOIO); 1640 if (!backoff) 1641 return NULL; 1642 1643 RB_CLEAR_NODE(&backoff->spg_node); 1644 RB_CLEAR_NODE(&backoff->id_node); 1645 return backoff; 1646 } 1647 1648 static void free_backoff(struct ceph_osd_backoff *backoff) 1649 { 1650 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node)); 1651 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node)); 1652 1653 free_hoid(backoff->begin); 1654 free_hoid(backoff->end); 1655 kfree(backoff); 1656 } 1657 1658 /* 1659 * Within a specific spgid, backoffs are managed by ->begin hoid. 1660 */ 1661 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare, 1662 RB_BYVAL, spg_node); 1663 1664 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root, 1665 const struct ceph_hobject_id *hoid) 1666 { 1667 struct rb_node *n = root->rb_node; 1668 1669 while (n) { 1670 struct ceph_osd_backoff *cur = 1671 rb_entry(n, struct ceph_osd_backoff, spg_node); 1672 int cmp; 1673 1674 cmp = hoid_compare(hoid, cur->begin); 1675 if (cmp < 0) { 1676 n = n->rb_left; 1677 } else if (cmp > 0) { 1678 if (hoid_compare(hoid, cur->end) < 0) 1679 return cur; 1680 1681 n = n->rb_right; 1682 } else { 1683 return cur; 1684 } 1685 } 1686 1687 return NULL; 1688 } 1689 1690 /* 1691 * Each backoff has a unique id within its OSD session. 1692 */ 1693 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node) 1694 1695 static void clear_backoffs(struct ceph_osd *osd) 1696 { 1697 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) { 1698 struct ceph_spg_mapping *spg = 1699 rb_entry(rb_first(&osd->o_backoff_mappings), 1700 struct ceph_spg_mapping, node); 1701 1702 while (!RB_EMPTY_ROOT(&spg->backoffs)) { 1703 struct ceph_osd_backoff *backoff = 1704 rb_entry(rb_first(&spg->backoffs), 1705 struct ceph_osd_backoff, spg_node); 1706 1707 erase_backoff(&spg->backoffs, backoff); 1708 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 1709 free_backoff(backoff); 1710 } 1711 erase_spg_mapping(&osd->o_backoff_mappings, spg); 1712 free_spg_mapping(spg); 1713 } 1714 } 1715 1716 /* 1717 * Set up a temporary, non-owning view into @t. 1718 */ 1719 static void hoid_fill_from_target(struct ceph_hobject_id *hoid, 1720 const struct ceph_osd_request_target *t) 1721 { 1722 hoid->key = NULL; 1723 hoid->key_len = 0; 1724 hoid->oid = t->target_oid.name; 1725 hoid->oid_len = t->target_oid.name_len; 1726 hoid->snapid = CEPH_NOSNAP; 1727 hoid->hash = t->pgid.seed; 1728 hoid->is_max = false; 1729 if (t->target_oloc.pool_ns) { 1730 hoid->nspace = t->target_oloc.pool_ns->str; 1731 hoid->nspace_len = t->target_oloc.pool_ns->len; 1732 } else { 1733 hoid->nspace = NULL; 1734 hoid->nspace_len = 0; 1735 } 1736 hoid->pool = t->target_oloc.pool; 1737 ceph_hoid_build_hash_cache(hoid); 1738 } 1739 1740 static bool should_plug_request(struct ceph_osd_request *req) 1741 { 1742 struct ceph_osd *osd = req->r_osd; 1743 struct ceph_spg_mapping *spg; 1744 struct ceph_osd_backoff *backoff; 1745 struct ceph_hobject_id hoid; 1746 1747 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid); 1748 if (!spg) 1749 return false; 1750 1751 hoid_fill_from_target(&hoid, &req->r_t); 1752 backoff = lookup_containing_backoff(&spg->backoffs, &hoid); 1753 if (!backoff) 1754 return false; 1755 1756 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n", 1757 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool, 1758 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id); 1759 return true; 1760 } 1761 1762 static void setup_request_data(struct ceph_osd_request *req, 1763 struct ceph_msg *msg) 1764 { 1765 u32 data_len = 0; 1766 int i; 1767 1768 if (!list_empty(&msg->data)) 1769 return; 1770 1771 WARN_ON(msg->data_length); 1772 for (i = 0; i < req->r_num_ops; i++) { 1773 struct ceph_osd_req_op *op = &req->r_ops[i]; 1774 1775 switch (op->op) { 1776 /* request */ 1777 case CEPH_OSD_OP_WRITE: 1778 case CEPH_OSD_OP_WRITEFULL: 1779 WARN_ON(op->indata_len != op->extent.length); 1780 ceph_osdc_msg_data_add(msg, &op->extent.osd_data); 1781 break; 1782 case CEPH_OSD_OP_SETXATTR: 1783 case CEPH_OSD_OP_CMPXATTR: 1784 WARN_ON(op->indata_len != op->xattr.name_len + 1785 op->xattr.value_len); 1786 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data); 1787 break; 1788 case CEPH_OSD_OP_NOTIFY_ACK: 1789 ceph_osdc_msg_data_add(msg, 1790 &op->notify_ack.request_data); 1791 break; 1792 1793 /* reply */ 1794 case CEPH_OSD_OP_STAT: 1795 ceph_osdc_msg_data_add(req->r_reply, 1796 &op->raw_data_in); 1797 break; 1798 case CEPH_OSD_OP_READ: 1799 ceph_osdc_msg_data_add(req->r_reply, 1800 &op->extent.osd_data); 1801 break; 1802 case CEPH_OSD_OP_LIST_WATCHERS: 1803 ceph_osdc_msg_data_add(req->r_reply, 1804 &op->list_watchers.response_data); 1805 break; 1806 1807 /* both */ 1808 case CEPH_OSD_OP_CALL: 1809 WARN_ON(op->indata_len != op->cls.class_len + 1810 op->cls.method_len + 1811 op->cls.indata_len); 1812 ceph_osdc_msg_data_add(msg, &op->cls.request_info); 1813 /* optional, can be NONE */ 1814 ceph_osdc_msg_data_add(msg, &op->cls.request_data); 1815 /* optional, can be NONE */ 1816 ceph_osdc_msg_data_add(req->r_reply, 1817 &op->cls.response_data); 1818 break; 1819 case CEPH_OSD_OP_NOTIFY: 1820 ceph_osdc_msg_data_add(msg, 1821 &op->notify.request_data); 1822 ceph_osdc_msg_data_add(req->r_reply, 1823 &op->notify.response_data); 1824 break; 1825 } 1826 1827 data_len += op->indata_len; 1828 } 1829 1830 WARN_ON(data_len != msg->data_length); 1831 } 1832 1833 static void encode_pgid(void **p, const struct ceph_pg *pgid) 1834 { 1835 ceph_encode_8(p, 1); 1836 ceph_encode_64(p, pgid->pool); 1837 ceph_encode_32(p, pgid->seed); 1838 ceph_encode_32(p, -1); /* preferred */ 1839 } 1840 1841 static void encode_spgid(void **p, const struct ceph_spg *spgid) 1842 { 1843 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1); 1844 encode_pgid(p, &spgid->pgid); 1845 ceph_encode_8(p, spgid->shard); 1846 } 1847 1848 static void encode_oloc(void **p, void *end, 1849 const struct ceph_object_locator *oloc) 1850 { 1851 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc)); 1852 ceph_encode_64(p, oloc->pool); 1853 ceph_encode_32(p, -1); /* preferred */ 1854 ceph_encode_32(p, 0); /* key len */ 1855 if (oloc->pool_ns) 1856 ceph_encode_string(p, end, oloc->pool_ns->str, 1857 oloc->pool_ns->len); 1858 else 1859 ceph_encode_32(p, 0); 1860 } 1861 1862 static void encode_request_partial(struct ceph_osd_request *req, 1863 struct ceph_msg *msg) 1864 { 1865 void *p = msg->front.iov_base; 1866 void *const end = p + msg->front_alloc_len; 1867 u32 data_len = 0; 1868 int i; 1869 1870 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 1871 /* snapshots aren't writeable */ 1872 WARN_ON(req->r_snapid != CEPH_NOSNAP); 1873 } else { 1874 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 1875 req->r_data_offset || req->r_snapc); 1876 } 1877 1878 setup_request_data(req, msg); 1879 1880 encode_spgid(&p, &req->r_t.spgid); /* actual spg */ 1881 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */ 1882 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 1883 ceph_encode_32(&p, req->r_flags); 1884 1885 /* reqid */ 1886 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid)); 1887 memset(p, 0, sizeof(struct ceph_osd_reqid)); 1888 p += sizeof(struct ceph_osd_reqid); 1889 1890 /* trace */ 1891 memset(p, 0, sizeof(struct ceph_blkin_trace_info)); 1892 p += sizeof(struct ceph_blkin_trace_info); 1893 1894 ceph_encode_32(&p, 0); /* client_inc, always 0 */ 1895 ceph_encode_timespec(p, &req->r_mtime); 1896 p += sizeof(struct ceph_timespec); 1897 1898 encode_oloc(&p, end, &req->r_t.target_oloc); 1899 ceph_encode_string(&p, end, req->r_t.target_oid.name, 1900 req->r_t.target_oid.name_len); 1901 1902 /* ops, can imply data */ 1903 ceph_encode_16(&p, req->r_num_ops); 1904 for (i = 0; i < req->r_num_ops; i++) { 1905 data_len += osd_req_encode_op(p, &req->r_ops[i]); 1906 p += sizeof(struct ceph_osd_op); 1907 } 1908 1909 ceph_encode_64(&p, req->r_snapid); /* snapid */ 1910 if (req->r_snapc) { 1911 ceph_encode_64(&p, req->r_snapc->seq); 1912 ceph_encode_32(&p, req->r_snapc->num_snaps); 1913 for (i = 0; i < req->r_snapc->num_snaps; i++) 1914 ceph_encode_64(&p, req->r_snapc->snaps[i]); 1915 } else { 1916 ceph_encode_64(&p, 0); /* snap_seq */ 1917 ceph_encode_32(&p, 0); /* snaps len */ 1918 } 1919 1920 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 1921 BUG_ON(p != end - 8); /* space for features */ 1922 1923 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */ 1924 /* front_len is finalized in encode_request_finish() */ 1925 msg->hdr.data_len = cpu_to_le32(data_len); 1926 /* 1927 * The header "data_off" is a hint to the receiver allowing it 1928 * to align received data into its buffers such that there's no 1929 * need to re-copy it before writing it to disk (direct I/O). 1930 */ 1931 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 1932 1933 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg, 1934 req->r_t.target_oid.name, req->r_t.target_oid.name_len); 1935 } 1936 1937 static void encode_request_finish(struct ceph_msg *msg) 1938 { 1939 void *p = msg->front.iov_base; 1940 void *const end = p + msg->front_alloc_len; 1941 1942 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) { 1943 /* luminous OSD -- encode features and be done */ 1944 p = end - 8; 1945 ceph_encode_64(&p, msg->con->peer_features); 1946 } else { 1947 struct { 1948 char spgid[CEPH_ENCODING_START_BLK_LEN + 1949 CEPH_PGID_ENCODING_LEN + 1]; 1950 __le32 hash; 1951 __le32 epoch; 1952 __le32 flags; 1953 char reqid[CEPH_ENCODING_START_BLK_LEN + 1954 sizeof(struct ceph_osd_reqid)]; 1955 char trace[sizeof(struct ceph_blkin_trace_info)]; 1956 __le32 client_inc; 1957 struct ceph_timespec mtime; 1958 } __packed head; 1959 struct ceph_pg pgid; 1960 void *oloc, *oid, *tail; 1961 int oloc_len, oid_len, tail_len; 1962 int len; 1963 1964 /* 1965 * Pre-luminous OSD -- reencode v8 into v4 using @head 1966 * as a temporary buffer. Encode the raw PG; the rest 1967 * is just a matter of moving oloc, oid and tail blobs 1968 * around. 1969 */ 1970 memcpy(&head, p, sizeof(head)); 1971 p += sizeof(head); 1972 1973 oloc = p; 1974 p += CEPH_ENCODING_START_BLK_LEN; 1975 pgid.pool = ceph_decode_64(&p); 1976 p += 4 + 4; /* preferred, key len */ 1977 len = ceph_decode_32(&p); 1978 p += len; /* nspace */ 1979 oloc_len = p - oloc; 1980 1981 oid = p; 1982 len = ceph_decode_32(&p); 1983 p += len; 1984 oid_len = p - oid; 1985 1986 tail = p; 1987 tail_len = (end - p) - 8; 1988 1989 p = msg->front.iov_base; 1990 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc)); 1991 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch)); 1992 ceph_encode_copy(&p, &head.flags, sizeof(head.flags)); 1993 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime)); 1994 1995 /* reassert_version */ 1996 memset(p, 0, sizeof(struct ceph_eversion)); 1997 p += sizeof(struct ceph_eversion); 1998 1999 BUG_ON(p >= oloc); 2000 memmove(p, oloc, oloc_len); 2001 p += oloc_len; 2002 2003 pgid.seed = le32_to_cpu(head.hash); 2004 encode_pgid(&p, &pgid); /* raw pg */ 2005 2006 BUG_ON(p >= oid); 2007 memmove(p, oid, oid_len); 2008 p += oid_len; 2009 2010 /* tail -- ops, snapid, snapc, retry_attempt */ 2011 BUG_ON(p >= tail); 2012 memmove(p, tail, tail_len); 2013 p += tail_len; 2014 2015 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 2016 } 2017 2018 BUG_ON(p > end); 2019 msg->front.iov_len = p - msg->front.iov_base; 2020 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2021 2022 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg, 2023 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len), 2024 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len), 2025 le16_to_cpu(msg->hdr.version)); 2026 } 2027 2028 /* 2029 * @req has to be assigned a tid and registered. 2030 */ 2031 static void send_request(struct ceph_osd_request *req) 2032 { 2033 struct ceph_osd *osd = req->r_osd; 2034 2035 verify_osd_locked(osd); 2036 WARN_ON(osd->o_osd != req->r_t.osd); 2037 2038 /* backoff? */ 2039 if (should_plug_request(req)) 2040 return; 2041 2042 /* 2043 * We may have a previously queued request message hanging 2044 * around. Cancel it to avoid corrupting the msgr. 2045 */ 2046 if (req->r_sent) 2047 ceph_msg_revoke(req->r_request); 2048 2049 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 2050 if (req->r_attempts) 2051 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2052 else 2053 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 2054 2055 encode_request_partial(req, req->r_request); 2056 2057 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n", 2058 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 2059 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed, 2060 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags, 2061 req->r_attempts); 2062 2063 req->r_t.paused = false; 2064 req->r_stamp = jiffies; 2065 req->r_attempts++; 2066 2067 req->r_sent = osd->o_incarnation; 2068 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 2069 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 2070 } 2071 2072 static void maybe_request_map(struct ceph_osd_client *osdc) 2073 { 2074 bool continuous = false; 2075 2076 verify_osdc_locked(osdc); 2077 WARN_ON(!osdc->osdmap->epoch); 2078 2079 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2080 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 2081 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2082 dout("%s osdc %p continuous\n", __func__, osdc); 2083 continuous = true; 2084 } else { 2085 dout("%s osdc %p onetime\n", __func__, osdc); 2086 } 2087 2088 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 2089 osdc->osdmap->epoch + 1, continuous)) 2090 ceph_monc_renew_subs(&osdc->client->monc); 2091 } 2092 2093 static void complete_request(struct ceph_osd_request *req, int err); 2094 static void send_map_check(struct ceph_osd_request *req); 2095 2096 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 2097 { 2098 struct ceph_osd_client *osdc = req->r_osdc; 2099 struct ceph_osd *osd; 2100 enum calc_target_result ct_res; 2101 bool need_send = false; 2102 bool promoted = false; 2103 bool need_abort = false; 2104 2105 WARN_ON(req->r_tid); 2106 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 2107 2108 again: 2109 ct_res = calc_target(osdc, &req->r_t, NULL, false); 2110 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 2111 goto promote; 2112 2113 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 2114 if (IS_ERR(osd)) { 2115 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 2116 goto promote; 2117 } 2118 2119 if (osdc->osdmap->epoch < osdc->epoch_barrier) { 2120 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch, 2121 osdc->epoch_barrier); 2122 req->r_t.paused = true; 2123 maybe_request_map(osdc); 2124 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2125 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2126 dout("req %p pausewr\n", req); 2127 req->r_t.paused = true; 2128 maybe_request_map(osdc); 2129 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 2130 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2131 dout("req %p pauserd\n", req); 2132 req->r_t.paused = true; 2133 maybe_request_map(osdc); 2134 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2135 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 2136 CEPH_OSD_FLAG_FULL_FORCE)) && 2137 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2138 pool_full(osdc, req->r_t.base_oloc.pool))) { 2139 dout("req %p full/pool_full\n", req); 2140 pr_warn_ratelimited("FULL or reached pool quota\n"); 2141 req->r_t.paused = true; 2142 maybe_request_map(osdc); 2143 if (req->r_abort_on_full) 2144 need_abort = true; 2145 } else if (!osd_homeless(osd)) { 2146 need_send = true; 2147 } else { 2148 maybe_request_map(osdc); 2149 } 2150 2151 mutex_lock(&osd->lock); 2152 /* 2153 * Assign the tid atomically with send_request() to protect 2154 * multiple writes to the same object from racing with each 2155 * other, resulting in out of order ops on the OSDs. 2156 */ 2157 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2158 link_request(osd, req); 2159 if (need_send) 2160 send_request(req); 2161 else if (need_abort) 2162 complete_request(req, -ENOSPC); 2163 mutex_unlock(&osd->lock); 2164 2165 if (ct_res == CALC_TARGET_POOL_DNE) 2166 send_map_check(req); 2167 2168 if (promoted) 2169 downgrade_write(&osdc->lock); 2170 return; 2171 2172 promote: 2173 up_read(&osdc->lock); 2174 down_write(&osdc->lock); 2175 wrlocked = true; 2176 promoted = true; 2177 goto again; 2178 } 2179 2180 static void account_request(struct ceph_osd_request *req) 2181 { 2182 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK)); 2183 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE))); 2184 2185 req->r_flags |= CEPH_OSD_FLAG_ONDISK; 2186 atomic_inc(&req->r_osdc->num_requests); 2187 2188 req->r_start_stamp = jiffies; 2189 } 2190 2191 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 2192 { 2193 ceph_osdc_get_request(req); 2194 account_request(req); 2195 __submit_request(req, wrlocked); 2196 } 2197 2198 static void finish_request(struct ceph_osd_request *req) 2199 { 2200 struct ceph_osd_client *osdc = req->r_osdc; 2201 2202 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 2203 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2204 2205 if (req->r_osd) 2206 unlink_request(req->r_osd, req); 2207 atomic_dec(&osdc->num_requests); 2208 2209 /* 2210 * If an OSD has failed or returned and a request has been sent 2211 * twice, it's possible to get a reply and end up here while the 2212 * request message is queued for delivery. We will ignore the 2213 * reply, so not a big deal, but better to try and catch it. 2214 */ 2215 ceph_msg_revoke(req->r_request); 2216 ceph_msg_revoke_incoming(req->r_reply); 2217 } 2218 2219 static void __complete_request(struct ceph_osd_request *req) 2220 { 2221 if (req->r_callback) { 2222 dout("%s req %p tid %llu cb %pf result %d\n", __func__, req, 2223 req->r_tid, req->r_callback, req->r_result); 2224 req->r_callback(req); 2225 } 2226 } 2227 2228 /* 2229 * This is open-coded in handle_reply(). 2230 */ 2231 static void complete_request(struct ceph_osd_request *req, int err) 2232 { 2233 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2234 2235 req->r_result = err; 2236 finish_request(req); 2237 __complete_request(req); 2238 complete_all(&req->r_completion); 2239 ceph_osdc_put_request(req); 2240 } 2241 2242 static void cancel_map_check(struct ceph_osd_request *req) 2243 { 2244 struct ceph_osd_client *osdc = req->r_osdc; 2245 struct ceph_osd_request *lookup_req; 2246 2247 verify_osdc_wrlocked(osdc); 2248 2249 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2250 if (!lookup_req) 2251 return; 2252 2253 WARN_ON(lookup_req != req); 2254 erase_request_mc(&osdc->map_checks, req); 2255 ceph_osdc_put_request(req); 2256 } 2257 2258 static void cancel_request(struct ceph_osd_request *req) 2259 { 2260 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2261 2262 cancel_map_check(req); 2263 finish_request(req); 2264 complete_all(&req->r_completion); 2265 ceph_osdc_put_request(req); 2266 } 2267 2268 static void abort_request(struct ceph_osd_request *req, int err) 2269 { 2270 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2271 2272 cancel_map_check(req); 2273 complete_request(req, err); 2274 } 2275 2276 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2277 { 2278 if (likely(eb > osdc->epoch_barrier)) { 2279 dout("updating epoch_barrier from %u to %u\n", 2280 osdc->epoch_barrier, eb); 2281 osdc->epoch_barrier = eb; 2282 /* Request map if we're not to the barrier yet */ 2283 if (eb > osdc->osdmap->epoch) 2284 maybe_request_map(osdc); 2285 } 2286 } 2287 2288 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2289 { 2290 down_read(&osdc->lock); 2291 if (unlikely(eb > osdc->epoch_barrier)) { 2292 up_read(&osdc->lock); 2293 down_write(&osdc->lock); 2294 update_epoch_barrier(osdc, eb); 2295 up_write(&osdc->lock); 2296 } else { 2297 up_read(&osdc->lock); 2298 } 2299 } 2300 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier); 2301 2302 /* 2303 * Drop all pending requests that are stalled waiting on a full condition to 2304 * clear, and complete them with ENOSPC as the return code. Set the 2305 * osdc->epoch_barrier to the latest map epoch that we've seen if any were 2306 * cancelled. 2307 */ 2308 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc) 2309 { 2310 struct rb_node *n; 2311 bool victims = false; 2312 2313 dout("enter abort_on_full\n"); 2314 2315 if (!ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !have_pool_full(osdc)) 2316 goto out; 2317 2318 /* Scan list and see if there is anything to abort */ 2319 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 2320 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 2321 struct rb_node *m; 2322 2323 m = rb_first(&osd->o_requests); 2324 while (m) { 2325 struct ceph_osd_request *req = rb_entry(m, 2326 struct ceph_osd_request, r_node); 2327 m = rb_next(m); 2328 2329 if (req->r_abort_on_full) { 2330 victims = true; 2331 break; 2332 } 2333 } 2334 if (victims) 2335 break; 2336 } 2337 2338 if (!victims) 2339 goto out; 2340 2341 /* 2342 * Update the barrier to current epoch if it's behind that point, 2343 * since we know we have some calls to be aborted in the tree. 2344 */ 2345 update_epoch_barrier(osdc, osdc->osdmap->epoch); 2346 2347 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 2348 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 2349 struct rb_node *m; 2350 2351 m = rb_first(&osd->o_requests); 2352 while (m) { 2353 struct ceph_osd_request *req = rb_entry(m, 2354 struct ceph_osd_request, r_node); 2355 m = rb_next(m); 2356 2357 if (req->r_abort_on_full && 2358 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2359 pool_full(osdc, req->r_t.target_oloc.pool))) 2360 abort_request(req, -ENOSPC); 2361 } 2362 } 2363 out: 2364 dout("return abort_on_full barrier=%u\n", osdc->epoch_barrier); 2365 } 2366 2367 static void check_pool_dne(struct ceph_osd_request *req) 2368 { 2369 struct ceph_osd_client *osdc = req->r_osdc; 2370 struct ceph_osdmap *map = osdc->osdmap; 2371 2372 verify_osdc_wrlocked(osdc); 2373 WARN_ON(!map->epoch); 2374 2375 if (req->r_attempts) { 2376 /* 2377 * We sent a request earlier, which means that 2378 * previously the pool existed, and now it does not 2379 * (i.e., it was deleted). 2380 */ 2381 req->r_map_dne_bound = map->epoch; 2382 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 2383 req->r_tid); 2384 } else { 2385 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 2386 req, req->r_tid, req->r_map_dne_bound, map->epoch); 2387 } 2388 2389 if (req->r_map_dne_bound) { 2390 if (map->epoch >= req->r_map_dne_bound) { 2391 /* we had a new enough map */ 2392 pr_info_ratelimited("tid %llu pool does not exist\n", 2393 req->r_tid); 2394 complete_request(req, -ENOENT); 2395 } 2396 } else { 2397 send_map_check(req); 2398 } 2399 } 2400 2401 static void map_check_cb(struct ceph_mon_generic_request *greq) 2402 { 2403 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2404 struct ceph_osd_request *req; 2405 u64 tid = greq->private_data; 2406 2407 WARN_ON(greq->result || !greq->u.newest); 2408 2409 down_write(&osdc->lock); 2410 req = lookup_request_mc(&osdc->map_checks, tid); 2411 if (!req) { 2412 dout("%s tid %llu dne\n", __func__, tid); 2413 goto out_unlock; 2414 } 2415 2416 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 2417 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 2418 if (!req->r_map_dne_bound) 2419 req->r_map_dne_bound = greq->u.newest; 2420 erase_request_mc(&osdc->map_checks, req); 2421 check_pool_dne(req); 2422 2423 ceph_osdc_put_request(req); 2424 out_unlock: 2425 up_write(&osdc->lock); 2426 } 2427 2428 static void send_map_check(struct ceph_osd_request *req) 2429 { 2430 struct ceph_osd_client *osdc = req->r_osdc; 2431 struct ceph_osd_request *lookup_req; 2432 int ret; 2433 2434 verify_osdc_wrlocked(osdc); 2435 2436 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2437 if (lookup_req) { 2438 WARN_ON(lookup_req != req); 2439 return; 2440 } 2441 2442 ceph_osdc_get_request(req); 2443 insert_request_mc(&osdc->map_checks, req); 2444 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2445 map_check_cb, req->r_tid); 2446 WARN_ON(ret); 2447 } 2448 2449 /* 2450 * lingering requests, watch/notify v2 infrastructure 2451 */ 2452 static void linger_release(struct kref *kref) 2453 { 2454 struct ceph_osd_linger_request *lreq = 2455 container_of(kref, struct ceph_osd_linger_request, kref); 2456 2457 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 2458 lreq->reg_req, lreq->ping_req); 2459 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 2460 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 2461 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 2462 WARN_ON(!list_empty(&lreq->scan_item)); 2463 WARN_ON(!list_empty(&lreq->pending_lworks)); 2464 WARN_ON(lreq->osd); 2465 2466 if (lreq->reg_req) 2467 ceph_osdc_put_request(lreq->reg_req); 2468 if (lreq->ping_req) 2469 ceph_osdc_put_request(lreq->ping_req); 2470 target_destroy(&lreq->t); 2471 kfree(lreq); 2472 } 2473 2474 static void linger_put(struct ceph_osd_linger_request *lreq) 2475 { 2476 if (lreq) 2477 kref_put(&lreq->kref, linger_release); 2478 } 2479 2480 static struct ceph_osd_linger_request * 2481 linger_get(struct ceph_osd_linger_request *lreq) 2482 { 2483 kref_get(&lreq->kref); 2484 return lreq; 2485 } 2486 2487 static struct ceph_osd_linger_request * 2488 linger_alloc(struct ceph_osd_client *osdc) 2489 { 2490 struct ceph_osd_linger_request *lreq; 2491 2492 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 2493 if (!lreq) 2494 return NULL; 2495 2496 kref_init(&lreq->kref); 2497 mutex_init(&lreq->lock); 2498 RB_CLEAR_NODE(&lreq->node); 2499 RB_CLEAR_NODE(&lreq->osdc_node); 2500 RB_CLEAR_NODE(&lreq->mc_node); 2501 INIT_LIST_HEAD(&lreq->scan_item); 2502 INIT_LIST_HEAD(&lreq->pending_lworks); 2503 init_completion(&lreq->reg_commit_wait); 2504 init_completion(&lreq->notify_finish_wait); 2505 2506 lreq->osdc = osdc; 2507 target_init(&lreq->t); 2508 2509 dout("%s lreq %p\n", __func__, lreq); 2510 return lreq; 2511 } 2512 2513 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 2514 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 2515 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 2516 2517 /* 2518 * Create linger request <-> OSD session relation. 2519 * 2520 * @lreq has to be registered, @osd may be homeless. 2521 */ 2522 static void link_linger(struct ceph_osd *osd, 2523 struct ceph_osd_linger_request *lreq) 2524 { 2525 verify_osd_locked(osd); 2526 WARN_ON(!lreq->linger_id || lreq->osd); 2527 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2528 osd->o_osd, lreq, lreq->linger_id); 2529 2530 if (!osd_homeless(osd)) 2531 __remove_osd_from_lru(osd); 2532 else 2533 atomic_inc(&osd->o_osdc->num_homeless); 2534 2535 get_osd(osd); 2536 insert_linger(&osd->o_linger_requests, lreq); 2537 lreq->osd = osd; 2538 } 2539 2540 static void unlink_linger(struct ceph_osd *osd, 2541 struct ceph_osd_linger_request *lreq) 2542 { 2543 verify_osd_locked(osd); 2544 WARN_ON(lreq->osd != osd); 2545 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2546 osd->o_osd, lreq, lreq->linger_id); 2547 2548 lreq->osd = NULL; 2549 erase_linger(&osd->o_linger_requests, lreq); 2550 put_osd(osd); 2551 2552 if (!osd_homeless(osd)) 2553 maybe_move_osd_to_lru(osd); 2554 else 2555 atomic_dec(&osd->o_osdc->num_homeless); 2556 } 2557 2558 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 2559 { 2560 verify_osdc_locked(lreq->osdc); 2561 2562 return !RB_EMPTY_NODE(&lreq->osdc_node); 2563 } 2564 2565 static bool linger_registered(struct ceph_osd_linger_request *lreq) 2566 { 2567 struct ceph_osd_client *osdc = lreq->osdc; 2568 bool registered; 2569 2570 down_read(&osdc->lock); 2571 registered = __linger_registered(lreq); 2572 up_read(&osdc->lock); 2573 2574 return registered; 2575 } 2576 2577 static void linger_register(struct ceph_osd_linger_request *lreq) 2578 { 2579 struct ceph_osd_client *osdc = lreq->osdc; 2580 2581 verify_osdc_wrlocked(osdc); 2582 WARN_ON(lreq->linger_id); 2583 2584 linger_get(lreq); 2585 lreq->linger_id = ++osdc->last_linger_id; 2586 insert_linger_osdc(&osdc->linger_requests, lreq); 2587 } 2588 2589 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2590 { 2591 struct ceph_osd_client *osdc = lreq->osdc; 2592 2593 verify_osdc_wrlocked(osdc); 2594 2595 erase_linger_osdc(&osdc->linger_requests, lreq); 2596 linger_put(lreq); 2597 } 2598 2599 static void cancel_linger_request(struct ceph_osd_request *req) 2600 { 2601 struct ceph_osd_linger_request *lreq = req->r_priv; 2602 2603 WARN_ON(!req->r_linger); 2604 cancel_request(req); 2605 linger_put(lreq); 2606 } 2607 2608 struct linger_work { 2609 struct work_struct work; 2610 struct ceph_osd_linger_request *lreq; 2611 struct list_head pending_item; 2612 unsigned long queued_stamp; 2613 2614 union { 2615 struct { 2616 u64 notify_id; 2617 u64 notifier_id; 2618 void *payload; /* points into @msg front */ 2619 size_t payload_len; 2620 2621 struct ceph_msg *msg; /* for ceph_msg_put() */ 2622 } notify; 2623 struct { 2624 int err; 2625 } error; 2626 }; 2627 }; 2628 2629 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2630 work_func_t workfn) 2631 { 2632 struct linger_work *lwork; 2633 2634 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2635 if (!lwork) 2636 return NULL; 2637 2638 INIT_WORK(&lwork->work, workfn); 2639 INIT_LIST_HEAD(&lwork->pending_item); 2640 lwork->lreq = linger_get(lreq); 2641 2642 return lwork; 2643 } 2644 2645 static void lwork_free(struct linger_work *lwork) 2646 { 2647 struct ceph_osd_linger_request *lreq = lwork->lreq; 2648 2649 mutex_lock(&lreq->lock); 2650 list_del(&lwork->pending_item); 2651 mutex_unlock(&lreq->lock); 2652 2653 linger_put(lreq); 2654 kfree(lwork); 2655 } 2656 2657 static void lwork_queue(struct linger_work *lwork) 2658 { 2659 struct ceph_osd_linger_request *lreq = lwork->lreq; 2660 struct ceph_osd_client *osdc = lreq->osdc; 2661 2662 verify_lreq_locked(lreq); 2663 WARN_ON(!list_empty(&lwork->pending_item)); 2664 2665 lwork->queued_stamp = jiffies; 2666 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2667 queue_work(osdc->notify_wq, &lwork->work); 2668 } 2669 2670 static void do_watch_notify(struct work_struct *w) 2671 { 2672 struct linger_work *lwork = container_of(w, struct linger_work, work); 2673 struct ceph_osd_linger_request *lreq = lwork->lreq; 2674 2675 if (!linger_registered(lreq)) { 2676 dout("%s lreq %p not registered\n", __func__, lreq); 2677 goto out; 2678 } 2679 2680 WARN_ON(!lreq->is_watch); 2681 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2682 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2683 lwork->notify.payload_len); 2684 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2685 lwork->notify.notifier_id, lwork->notify.payload, 2686 lwork->notify.payload_len); 2687 2688 out: 2689 ceph_msg_put(lwork->notify.msg); 2690 lwork_free(lwork); 2691 } 2692 2693 static void do_watch_error(struct work_struct *w) 2694 { 2695 struct linger_work *lwork = container_of(w, struct linger_work, work); 2696 struct ceph_osd_linger_request *lreq = lwork->lreq; 2697 2698 if (!linger_registered(lreq)) { 2699 dout("%s lreq %p not registered\n", __func__, lreq); 2700 goto out; 2701 } 2702 2703 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2704 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2705 2706 out: 2707 lwork_free(lwork); 2708 } 2709 2710 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2711 { 2712 struct linger_work *lwork; 2713 2714 lwork = lwork_alloc(lreq, do_watch_error); 2715 if (!lwork) { 2716 pr_err("failed to allocate error-lwork\n"); 2717 return; 2718 } 2719 2720 lwork->error.err = lreq->last_error; 2721 lwork_queue(lwork); 2722 } 2723 2724 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2725 int result) 2726 { 2727 if (!completion_done(&lreq->reg_commit_wait)) { 2728 lreq->reg_commit_error = (result <= 0 ? result : 0); 2729 complete_all(&lreq->reg_commit_wait); 2730 } 2731 } 2732 2733 static void linger_commit_cb(struct ceph_osd_request *req) 2734 { 2735 struct ceph_osd_linger_request *lreq = req->r_priv; 2736 2737 mutex_lock(&lreq->lock); 2738 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2739 lreq->linger_id, req->r_result); 2740 linger_reg_commit_complete(lreq, req->r_result); 2741 lreq->committed = true; 2742 2743 if (!lreq->is_watch) { 2744 struct ceph_osd_data *osd_data = 2745 osd_req_op_data(req, 0, notify, response_data); 2746 void *p = page_address(osd_data->pages[0]); 2747 2748 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2749 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2750 2751 /* make note of the notify_id */ 2752 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2753 lreq->notify_id = ceph_decode_64(&p); 2754 dout("lreq %p notify_id %llu\n", lreq, 2755 lreq->notify_id); 2756 } else { 2757 dout("lreq %p no notify_id\n", lreq); 2758 } 2759 } 2760 2761 mutex_unlock(&lreq->lock); 2762 linger_put(lreq); 2763 } 2764 2765 static int normalize_watch_error(int err) 2766 { 2767 /* 2768 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2769 * notification and a failure to reconnect because we raced with 2770 * the delete appear the same to the user. 2771 */ 2772 if (err == -ENOENT) 2773 err = -ENOTCONN; 2774 2775 return err; 2776 } 2777 2778 static void linger_reconnect_cb(struct ceph_osd_request *req) 2779 { 2780 struct ceph_osd_linger_request *lreq = req->r_priv; 2781 2782 mutex_lock(&lreq->lock); 2783 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2784 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2785 if (req->r_result < 0) { 2786 if (!lreq->last_error) { 2787 lreq->last_error = normalize_watch_error(req->r_result); 2788 queue_watch_error(lreq); 2789 } 2790 } 2791 2792 mutex_unlock(&lreq->lock); 2793 linger_put(lreq); 2794 } 2795 2796 static void send_linger(struct ceph_osd_linger_request *lreq) 2797 { 2798 struct ceph_osd_request *req = lreq->reg_req; 2799 struct ceph_osd_req_op *op = &req->r_ops[0]; 2800 2801 verify_osdc_wrlocked(req->r_osdc); 2802 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2803 2804 if (req->r_osd) 2805 cancel_linger_request(req); 2806 2807 request_reinit(req); 2808 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 2809 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 2810 req->r_flags = lreq->t.flags; 2811 req->r_mtime = lreq->mtime; 2812 2813 mutex_lock(&lreq->lock); 2814 if (lreq->is_watch && lreq->committed) { 2815 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2816 op->watch.cookie != lreq->linger_id); 2817 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 2818 op->watch.gen = ++lreq->register_gen; 2819 dout("lreq %p reconnect register_gen %u\n", lreq, 2820 op->watch.gen); 2821 req->r_callback = linger_reconnect_cb; 2822 } else { 2823 if (!lreq->is_watch) 2824 lreq->notify_id = 0; 2825 else 2826 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 2827 dout("lreq %p register\n", lreq); 2828 req->r_callback = linger_commit_cb; 2829 } 2830 mutex_unlock(&lreq->lock); 2831 2832 req->r_priv = linger_get(lreq); 2833 req->r_linger = true; 2834 2835 submit_request(req, true); 2836 } 2837 2838 static void linger_ping_cb(struct ceph_osd_request *req) 2839 { 2840 struct ceph_osd_linger_request *lreq = req->r_priv; 2841 2842 mutex_lock(&lreq->lock); 2843 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 2844 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 2845 lreq->last_error); 2846 if (lreq->register_gen == req->r_ops[0].watch.gen) { 2847 if (!req->r_result) { 2848 lreq->watch_valid_thru = lreq->ping_sent; 2849 } else if (!lreq->last_error) { 2850 lreq->last_error = normalize_watch_error(req->r_result); 2851 queue_watch_error(lreq); 2852 } 2853 } else { 2854 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 2855 lreq->register_gen, req->r_ops[0].watch.gen); 2856 } 2857 2858 mutex_unlock(&lreq->lock); 2859 linger_put(lreq); 2860 } 2861 2862 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 2863 { 2864 struct ceph_osd_client *osdc = lreq->osdc; 2865 struct ceph_osd_request *req = lreq->ping_req; 2866 struct ceph_osd_req_op *op = &req->r_ops[0]; 2867 2868 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2869 dout("%s PAUSERD\n", __func__); 2870 return; 2871 } 2872 2873 lreq->ping_sent = jiffies; 2874 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 2875 __func__, lreq, lreq->linger_id, lreq->ping_sent, 2876 lreq->register_gen); 2877 2878 if (req->r_osd) 2879 cancel_linger_request(req); 2880 2881 request_reinit(req); 2882 target_copy(&req->r_t, &lreq->t); 2883 2884 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2885 op->watch.cookie != lreq->linger_id || 2886 op->watch.op != CEPH_OSD_WATCH_OP_PING); 2887 op->watch.gen = lreq->register_gen; 2888 req->r_callback = linger_ping_cb; 2889 req->r_priv = linger_get(lreq); 2890 req->r_linger = true; 2891 2892 ceph_osdc_get_request(req); 2893 account_request(req); 2894 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2895 link_request(lreq->osd, req); 2896 send_request(req); 2897 } 2898 2899 static void linger_submit(struct ceph_osd_linger_request *lreq) 2900 { 2901 struct ceph_osd_client *osdc = lreq->osdc; 2902 struct ceph_osd *osd; 2903 2904 calc_target(osdc, &lreq->t, NULL, false); 2905 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2906 link_linger(osd, lreq); 2907 2908 send_linger(lreq); 2909 } 2910 2911 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 2912 { 2913 struct ceph_osd_client *osdc = lreq->osdc; 2914 struct ceph_osd_linger_request *lookup_lreq; 2915 2916 verify_osdc_wrlocked(osdc); 2917 2918 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2919 lreq->linger_id); 2920 if (!lookup_lreq) 2921 return; 2922 2923 WARN_ON(lookup_lreq != lreq); 2924 erase_linger_mc(&osdc->linger_map_checks, lreq); 2925 linger_put(lreq); 2926 } 2927 2928 /* 2929 * @lreq has to be both registered and linked. 2930 */ 2931 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 2932 { 2933 if (lreq->is_watch && lreq->ping_req->r_osd) 2934 cancel_linger_request(lreq->ping_req); 2935 if (lreq->reg_req->r_osd) 2936 cancel_linger_request(lreq->reg_req); 2937 cancel_linger_map_check(lreq); 2938 unlink_linger(lreq->osd, lreq); 2939 linger_unregister(lreq); 2940 } 2941 2942 static void linger_cancel(struct ceph_osd_linger_request *lreq) 2943 { 2944 struct ceph_osd_client *osdc = lreq->osdc; 2945 2946 down_write(&osdc->lock); 2947 if (__linger_registered(lreq)) 2948 __linger_cancel(lreq); 2949 up_write(&osdc->lock); 2950 } 2951 2952 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 2953 2954 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 2955 { 2956 struct ceph_osd_client *osdc = lreq->osdc; 2957 struct ceph_osdmap *map = osdc->osdmap; 2958 2959 verify_osdc_wrlocked(osdc); 2960 WARN_ON(!map->epoch); 2961 2962 if (lreq->register_gen) { 2963 lreq->map_dne_bound = map->epoch; 2964 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 2965 lreq, lreq->linger_id); 2966 } else { 2967 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 2968 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2969 map->epoch); 2970 } 2971 2972 if (lreq->map_dne_bound) { 2973 if (map->epoch >= lreq->map_dne_bound) { 2974 /* we had a new enough map */ 2975 pr_info("linger_id %llu pool does not exist\n", 2976 lreq->linger_id); 2977 linger_reg_commit_complete(lreq, -ENOENT); 2978 __linger_cancel(lreq); 2979 } 2980 } else { 2981 send_linger_map_check(lreq); 2982 } 2983 } 2984 2985 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 2986 { 2987 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2988 struct ceph_osd_linger_request *lreq; 2989 u64 linger_id = greq->private_data; 2990 2991 WARN_ON(greq->result || !greq->u.newest); 2992 2993 down_write(&osdc->lock); 2994 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 2995 if (!lreq) { 2996 dout("%s linger_id %llu dne\n", __func__, linger_id); 2997 goto out_unlock; 2998 } 2999 3000 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 3001 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3002 greq->u.newest); 3003 if (!lreq->map_dne_bound) 3004 lreq->map_dne_bound = greq->u.newest; 3005 erase_linger_mc(&osdc->linger_map_checks, lreq); 3006 check_linger_pool_dne(lreq); 3007 3008 linger_put(lreq); 3009 out_unlock: 3010 up_write(&osdc->lock); 3011 } 3012 3013 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 3014 { 3015 struct ceph_osd_client *osdc = lreq->osdc; 3016 struct ceph_osd_linger_request *lookup_lreq; 3017 int ret; 3018 3019 verify_osdc_wrlocked(osdc); 3020 3021 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3022 lreq->linger_id); 3023 if (lookup_lreq) { 3024 WARN_ON(lookup_lreq != lreq); 3025 return; 3026 } 3027 3028 linger_get(lreq); 3029 insert_linger_mc(&osdc->linger_map_checks, lreq); 3030 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 3031 linger_map_check_cb, lreq->linger_id); 3032 WARN_ON(ret); 3033 } 3034 3035 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 3036 { 3037 int ret; 3038 3039 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3040 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 3041 return ret ?: lreq->reg_commit_error; 3042 } 3043 3044 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 3045 { 3046 int ret; 3047 3048 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3049 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 3050 return ret ?: lreq->notify_finish_error; 3051 } 3052 3053 /* 3054 * Timeout callback, called every N seconds. When 1 or more OSD 3055 * requests has been active for more than N seconds, we send a keepalive 3056 * (tag + timestamp) to its OSD to ensure any communications channel 3057 * reset is detected. 3058 */ 3059 static void handle_timeout(struct work_struct *work) 3060 { 3061 struct ceph_osd_client *osdc = 3062 container_of(work, struct ceph_osd_client, timeout_work.work); 3063 struct ceph_options *opts = osdc->client->options; 3064 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 3065 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout; 3066 LIST_HEAD(slow_osds); 3067 struct rb_node *n, *p; 3068 3069 dout("%s osdc %p\n", __func__, osdc); 3070 down_write(&osdc->lock); 3071 3072 /* 3073 * ping osds that are a bit slow. this ensures that if there 3074 * is a break in the TCP connection we will notice, and reopen 3075 * a connection with that osd (from the fault callback). 3076 */ 3077 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3078 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3079 bool found = false; 3080 3081 for (p = rb_first(&osd->o_requests); p; ) { 3082 struct ceph_osd_request *req = 3083 rb_entry(p, struct ceph_osd_request, r_node); 3084 3085 p = rb_next(p); /* abort_request() */ 3086 3087 if (time_before(req->r_stamp, cutoff)) { 3088 dout(" req %p tid %llu on osd%d is laggy\n", 3089 req, req->r_tid, osd->o_osd); 3090 found = true; 3091 } 3092 if (opts->osd_request_timeout && 3093 time_before(req->r_start_stamp, expiry_cutoff)) { 3094 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3095 req->r_tid, osd->o_osd); 3096 abort_request(req, -ETIMEDOUT); 3097 } 3098 } 3099 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 3100 struct ceph_osd_linger_request *lreq = 3101 rb_entry(p, struct ceph_osd_linger_request, node); 3102 3103 dout(" lreq %p linger_id %llu is served by osd%d\n", 3104 lreq, lreq->linger_id, osd->o_osd); 3105 found = true; 3106 3107 mutex_lock(&lreq->lock); 3108 if (lreq->is_watch && lreq->committed && !lreq->last_error) 3109 send_linger_ping(lreq); 3110 mutex_unlock(&lreq->lock); 3111 } 3112 3113 if (found) 3114 list_move_tail(&osd->o_keepalive_item, &slow_osds); 3115 } 3116 3117 if (opts->osd_request_timeout) { 3118 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 3119 struct ceph_osd_request *req = 3120 rb_entry(p, struct ceph_osd_request, r_node); 3121 3122 p = rb_next(p); /* abort_request() */ 3123 3124 if (time_before(req->r_start_stamp, expiry_cutoff)) { 3125 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3126 req->r_tid, osdc->homeless_osd.o_osd); 3127 abort_request(req, -ETIMEDOUT); 3128 } 3129 } 3130 } 3131 3132 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 3133 maybe_request_map(osdc); 3134 3135 while (!list_empty(&slow_osds)) { 3136 struct ceph_osd *osd = list_first_entry(&slow_osds, 3137 struct ceph_osd, 3138 o_keepalive_item); 3139 list_del_init(&osd->o_keepalive_item); 3140 ceph_con_keepalive(&osd->o_con); 3141 } 3142 3143 up_write(&osdc->lock); 3144 schedule_delayed_work(&osdc->timeout_work, 3145 osdc->client->options->osd_keepalive_timeout); 3146 } 3147 3148 static void handle_osds_timeout(struct work_struct *work) 3149 { 3150 struct ceph_osd_client *osdc = 3151 container_of(work, struct ceph_osd_client, 3152 osds_timeout_work.work); 3153 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 3154 struct ceph_osd *osd, *nosd; 3155 3156 dout("%s osdc %p\n", __func__, osdc); 3157 down_write(&osdc->lock); 3158 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 3159 if (time_before(jiffies, osd->lru_ttl)) 3160 break; 3161 3162 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 3163 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 3164 close_osd(osd); 3165 } 3166 3167 up_write(&osdc->lock); 3168 schedule_delayed_work(&osdc->osds_timeout_work, 3169 round_jiffies_relative(delay)); 3170 } 3171 3172 static int ceph_oloc_decode(void **p, void *end, 3173 struct ceph_object_locator *oloc) 3174 { 3175 u8 struct_v, struct_cv; 3176 u32 len; 3177 void *struct_end; 3178 int ret = 0; 3179 3180 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3181 struct_v = ceph_decode_8(p); 3182 struct_cv = ceph_decode_8(p); 3183 if (struct_v < 3) { 3184 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 3185 struct_v, struct_cv); 3186 goto e_inval; 3187 } 3188 if (struct_cv > 6) { 3189 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 3190 struct_v, struct_cv); 3191 goto e_inval; 3192 } 3193 len = ceph_decode_32(p); 3194 ceph_decode_need(p, end, len, e_inval); 3195 struct_end = *p + len; 3196 3197 oloc->pool = ceph_decode_64(p); 3198 *p += 4; /* skip preferred */ 3199 3200 len = ceph_decode_32(p); 3201 if (len > 0) { 3202 pr_warn("ceph_object_locator::key is set\n"); 3203 goto e_inval; 3204 } 3205 3206 if (struct_v >= 5) { 3207 bool changed = false; 3208 3209 len = ceph_decode_32(p); 3210 if (len > 0) { 3211 ceph_decode_need(p, end, len, e_inval); 3212 if (!oloc->pool_ns || 3213 ceph_compare_string(oloc->pool_ns, *p, len)) 3214 changed = true; 3215 *p += len; 3216 } else { 3217 if (oloc->pool_ns) 3218 changed = true; 3219 } 3220 if (changed) { 3221 /* redirect changes namespace */ 3222 pr_warn("ceph_object_locator::nspace is changed\n"); 3223 goto e_inval; 3224 } 3225 } 3226 3227 if (struct_v >= 6) { 3228 s64 hash = ceph_decode_64(p); 3229 if (hash != -1) { 3230 pr_warn("ceph_object_locator::hash is set\n"); 3231 goto e_inval; 3232 } 3233 } 3234 3235 /* skip the rest */ 3236 *p = struct_end; 3237 out: 3238 return ret; 3239 3240 e_inval: 3241 ret = -EINVAL; 3242 goto out; 3243 } 3244 3245 static int ceph_redirect_decode(void **p, void *end, 3246 struct ceph_request_redirect *redir) 3247 { 3248 u8 struct_v, struct_cv; 3249 u32 len; 3250 void *struct_end; 3251 int ret; 3252 3253 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3254 struct_v = ceph_decode_8(p); 3255 struct_cv = ceph_decode_8(p); 3256 if (struct_cv > 1) { 3257 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 3258 struct_v, struct_cv); 3259 goto e_inval; 3260 } 3261 len = ceph_decode_32(p); 3262 ceph_decode_need(p, end, len, e_inval); 3263 struct_end = *p + len; 3264 3265 ret = ceph_oloc_decode(p, end, &redir->oloc); 3266 if (ret) 3267 goto out; 3268 3269 len = ceph_decode_32(p); 3270 if (len > 0) { 3271 pr_warn("ceph_request_redirect::object_name is set\n"); 3272 goto e_inval; 3273 } 3274 3275 len = ceph_decode_32(p); 3276 *p += len; /* skip osd_instructions */ 3277 3278 /* skip the rest */ 3279 *p = struct_end; 3280 out: 3281 return ret; 3282 3283 e_inval: 3284 ret = -EINVAL; 3285 goto out; 3286 } 3287 3288 struct MOSDOpReply { 3289 struct ceph_pg pgid; 3290 u64 flags; 3291 int result; 3292 u32 epoch; 3293 int num_ops; 3294 u32 outdata_len[CEPH_OSD_MAX_OPS]; 3295 s32 rval[CEPH_OSD_MAX_OPS]; 3296 int retry_attempt; 3297 struct ceph_eversion replay_version; 3298 u64 user_version; 3299 struct ceph_request_redirect redirect; 3300 }; 3301 3302 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 3303 { 3304 void *p = msg->front.iov_base; 3305 void *const end = p + msg->front.iov_len; 3306 u16 version = le16_to_cpu(msg->hdr.version); 3307 struct ceph_eversion bad_replay_version; 3308 u8 decode_redir; 3309 u32 len; 3310 int ret; 3311 int i; 3312 3313 ceph_decode_32_safe(&p, end, len, e_inval); 3314 ceph_decode_need(&p, end, len, e_inval); 3315 p += len; /* skip oid */ 3316 3317 ret = ceph_decode_pgid(&p, end, &m->pgid); 3318 if (ret) 3319 return ret; 3320 3321 ceph_decode_64_safe(&p, end, m->flags, e_inval); 3322 ceph_decode_32_safe(&p, end, m->result, e_inval); 3323 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 3324 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 3325 p += sizeof(bad_replay_version); 3326 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 3327 3328 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 3329 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 3330 goto e_inval; 3331 3332 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 3333 e_inval); 3334 for (i = 0; i < m->num_ops; i++) { 3335 struct ceph_osd_op *op = p; 3336 3337 m->outdata_len[i] = le32_to_cpu(op->payload_len); 3338 p += sizeof(*op); 3339 } 3340 3341 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 3342 for (i = 0; i < m->num_ops; i++) 3343 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 3344 3345 if (version >= 5) { 3346 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 3347 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 3348 p += sizeof(m->replay_version); 3349 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 3350 } else { 3351 m->replay_version = bad_replay_version; /* struct */ 3352 m->user_version = le64_to_cpu(m->replay_version.version); 3353 } 3354 3355 if (version >= 6) { 3356 if (version >= 7) 3357 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 3358 else 3359 decode_redir = 1; 3360 } else { 3361 decode_redir = 0; 3362 } 3363 3364 if (decode_redir) { 3365 ret = ceph_redirect_decode(&p, end, &m->redirect); 3366 if (ret) 3367 return ret; 3368 } else { 3369 ceph_oloc_init(&m->redirect.oloc); 3370 } 3371 3372 return 0; 3373 3374 e_inval: 3375 return -EINVAL; 3376 } 3377 3378 /* 3379 * Handle MOSDOpReply. Set ->r_result and call the callback if it is 3380 * specified. 3381 */ 3382 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 3383 { 3384 struct ceph_osd_client *osdc = osd->o_osdc; 3385 struct ceph_osd_request *req; 3386 struct MOSDOpReply m; 3387 u64 tid = le64_to_cpu(msg->hdr.tid); 3388 u32 data_len = 0; 3389 int ret; 3390 int i; 3391 3392 dout("%s msg %p tid %llu\n", __func__, msg, tid); 3393 3394 down_read(&osdc->lock); 3395 if (!osd_registered(osd)) { 3396 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3397 goto out_unlock_osdc; 3398 } 3399 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 3400 3401 mutex_lock(&osd->lock); 3402 req = lookup_request(&osd->o_requests, tid); 3403 if (!req) { 3404 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 3405 goto out_unlock_session; 3406 } 3407 3408 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 3409 ret = decode_MOSDOpReply(msg, &m); 3410 m.redirect.oloc.pool_ns = NULL; 3411 if (ret) { 3412 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 3413 req->r_tid, ret); 3414 ceph_msg_dump(msg); 3415 goto fail_request; 3416 } 3417 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 3418 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 3419 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 3420 le64_to_cpu(m.replay_version.version), m.user_version); 3421 3422 if (m.retry_attempt >= 0) { 3423 if (m.retry_attempt != req->r_attempts - 1) { 3424 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 3425 req, req->r_tid, m.retry_attempt, 3426 req->r_attempts - 1); 3427 goto out_unlock_session; 3428 } 3429 } else { 3430 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 3431 } 3432 3433 if (!ceph_oloc_empty(&m.redirect.oloc)) { 3434 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 3435 m.redirect.oloc.pool); 3436 unlink_request(osd, req); 3437 mutex_unlock(&osd->lock); 3438 3439 /* 3440 * Not ceph_oloc_copy() - changing pool_ns is not 3441 * supported. 3442 */ 3443 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 3444 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED; 3445 req->r_tid = 0; 3446 __submit_request(req, false); 3447 goto out_unlock_osdc; 3448 } 3449 3450 if (m.num_ops != req->r_num_ops) { 3451 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 3452 req->r_num_ops, req->r_tid); 3453 goto fail_request; 3454 } 3455 for (i = 0; i < req->r_num_ops; i++) { 3456 dout(" req %p tid %llu op %d rval %d len %u\n", req, 3457 req->r_tid, i, m.rval[i], m.outdata_len[i]); 3458 req->r_ops[i].rval = m.rval[i]; 3459 req->r_ops[i].outdata_len = m.outdata_len[i]; 3460 data_len += m.outdata_len[i]; 3461 } 3462 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 3463 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 3464 le32_to_cpu(msg->hdr.data_len), req->r_tid); 3465 goto fail_request; 3466 } 3467 dout("%s req %p tid %llu result %d data_len %u\n", __func__, 3468 req, req->r_tid, m.result, data_len); 3469 3470 /* 3471 * Since we only ever request ONDISK, we should only ever get 3472 * one (type of) reply back. 3473 */ 3474 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK)); 3475 req->r_result = m.result ?: data_len; 3476 finish_request(req); 3477 mutex_unlock(&osd->lock); 3478 up_read(&osdc->lock); 3479 3480 __complete_request(req); 3481 complete_all(&req->r_completion); 3482 ceph_osdc_put_request(req); 3483 return; 3484 3485 fail_request: 3486 complete_request(req, -EIO); 3487 out_unlock_session: 3488 mutex_unlock(&osd->lock); 3489 out_unlock_osdc: 3490 up_read(&osdc->lock); 3491 } 3492 3493 static void set_pool_was_full(struct ceph_osd_client *osdc) 3494 { 3495 struct rb_node *n; 3496 3497 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 3498 struct ceph_pg_pool_info *pi = 3499 rb_entry(n, struct ceph_pg_pool_info, node); 3500 3501 pi->was_full = __pool_full(pi); 3502 } 3503 } 3504 3505 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 3506 { 3507 struct ceph_pg_pool_info *pi; 3508 3509 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 3510 if (!pi) 3511 return false; 3512 3513 return pi->was_full && !__pool_full(pi); 3514 } 3515 3516 static enum calc_target_result 3517 recalc_linger_target(struct ceph_osd_linger_request *lreq) 3518 { 3519 struct ceph_osd_client *osdc = lreq->osdc; 3520 enum calc_target_result ct_res; 3521 3522 ct_res = calc_target(osdc, &lreq->t, NULL, true); 3523 if (ct_res == CALC_TARGET_NEED_RESEND) { 3524 struct ceph_osd *osd; 3525 3526 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3527 if (osd != lreq->osd) { 3528 unlink_linger(lreq->osd, lreq); 3529 link_linger(osd, lreq); 3530 } 3531 } 3532 3533 return ct_res; 3534 } 3535 3536 /* 3537 * Requeue requests whose mapping to an OSD has changed. 3538 */ 3539 static void scan_requests(struct ceph_osd *osd, 3540 bool force_resend, 3541 bool cleared_full, 3542 bool check_pool_cleared_full, 3543 struct rb_root *need_resend, 3544 struct list_head *need_resend_linger) 3545 { 3546 struct ceph_osd_client *osdc = osd->o_osdc; 3547 struct rb_node *n; 3548 bool force_resend_writes; 3549 3550 for (n = rb_first(&osd->o_linger_requests); n; ) { 3551 struct ceph_osd_linger_request *lreq = 3552 rb_entry(n, struct ceph_osd_linger_request, node); 3553 enum calc_target_result ct_res; 3554 3555 n = rb_next(n); /* recalc_linger_target() */ 3556 3557 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 3558 lreq->linger_id); 3559 ct_res = recalc_linger_target(lreq); 3560 switch (ct_res) { 3561 case CALC_TARGET_NO_ACTION: 3562 force_resend_writes = cleared_full || 3563 (check_pool_cleared_full && 3564 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 3565 if (!force_resend && !force_resend_writes) 3566 break; 3567 3568 /* fall through */ 3569 case CALC_TARGET_NEED_RESEND: 3570 cancel_linger_map_check(lreq); 3571 /* 3572 * scan_requests() for the previous epoch(s) 3573 * may have already added it to the list, since 3574 * it's not unlinked here. 3575 */ 3576 if (list_empty(&lreq->scan_item)) 3577 list_add_tail(&lreq->scan_item, need_resend_linger); 3578 break; 3579 case CALC_TARGET_POOL_DNE: 3580 list_del_init(&lreq->scan_item); 3581 check_linger_pool_dne(lreq); 3582 break; 3583 } 3584 } 3585 3586 for (n = rb_first(&osd->o_requests); n; ) { 3587 struct ceph_osd_request *req = 3588 rb_entry(n, struct ceph_osd_request, r_node); 3589 enum calc_target_result ct_res; 3590 3591 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3592 3593 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3594 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con, 3595 false); 3596 switch (ct_res) { 3597 case CALC_TARGET_NO_ACTION: 3598 force_resend_writes = cleared_full || 3599 (check_pool_cleared_full && 3600 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3601 if (!force_resend && 3602 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3603 !force_resend_writes)) 3604 break; 3605 3606 /* fall through */ 3607 case CALC_TARGET_NEED_RESEND: 3608 cancel_map_check(req); 3609 unlink_request(osd, req); 3610 insert_request(need_resend, req); 3611 break; 3612 case CALC_TARGET_POOL_DNE: 3613 check_pool_dne(req); 3614 break; 3615 } 3616 } 3617 } 3618 3619 static int handle_one_map(struct ceph_osd_client *osdc, 3620 void *p, void *end, bool incremental, 3621 struct rb_root *need_resend, 3622 struct list_head *need_resend_linger) 3623 { 3624 struct ceph_osdmap *newmap; 3625 struct rb_node *n; 3626 bool skipped_map = false; 3627 bool was_full; 3628 3629 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3630 set_pool_was_full(osdc); 3631 3632 if (incremental) 3633 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3634 else 3635 newmap = ceph_osdmap_decode(&p, end); 3636 if (IS_ERR(newmap)) 3637 return PTR_ERR(newmap); 3638 3639 if (newmap != osdc->osdmap) { 3640 /* 3641 * Preserve ->was_full before destroying the old map. 3642 * For pools that weren't in the old map, ->was_full 3643 * should be false. 3644 */ 3645 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3646 struct ceph_pg_pool_info *pi = 3647 rb_entry(n, struct ceph_pg_pool_info, node); 3648 struct ceph_pg_pool_info *old_pi; 3649 3650 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3651 if (old_pi) 3652 pi->was_full = old_pi->was_full; 3653 else 3654 WARN_ON(pi->was_full); 3655 } 3656 3657 if (osdc->osdmap->epoch && 3658 osdc->osdmap->epoch + 1 < newmap->epoch) { 3659 WARN_ON(incremental); 3660 skipped_map = true; 3661 } 3662 3663 ceph_osdmap_destroy(osdc->osdmap); 3664 osdc->osdmap = newmap; 3665 } 3666 3667 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3668 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3669 need_resend, need_resend_linger); 3670 3671 for (n = rb_first(&osdc->osds); n; ) { 3672 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3673 3674 n = rb_next(n); /* close_osd() */ 3675 3676 scan_requests(osd, skipped_map, was_full, true, need_resend, 3677 need_resend_linger); 3678 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3679 memcmp(&osd->o_con.peer_addr, 3680 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3681 sizeof(struct ceph_entity_addr))) 3682 close_osd(osd); 3683 } 3684 3685 return 0; 3686 } 3687 3688 static void kick_requests(struct ceph_osd_client *osdc, 3689 struct rb_root *need_resend, 3690 struct list_head *need_resend_linger) 3691 { 3692 struct ceph_osd_linger_request *lreq, *nlreq; 3693 enum calc_target_result ct_res; 3694 struct rb_node *n; 3695 3696 /* make sure need_resend targets reflect latest map */ 3697 for (n = rb_first(need_resend); n; ) { 3698 struct ceph_osd_request *req = 3699 rb_entry(n, struct ceph_osd_request, r_node); 3700 3701 n = rb_next(n); 3702 3703 if (req->r_t.epoch < osdc->osdmap->epoch) { 3704 ct_res = calc_target(osdc, &req->r_t, NULL, false); 3705 if (ct_res == CALC_TARGET_POOL_DNE) { 3706 erase_request(need_resend, req); 3707 check_pool_dne(req); 3708 } 3709 } 3710 } 3711 3712 for (n = rb_first(need_resend); n; ) { 3713 struct ceph_osd_request *req = 3714 rb_entry(n, struct ceph_osd_request, r_node); 3715 struct ceph_osd *osd; 3716 3717 n = rb_next(n); 3718 erase_request(need_resend, req); /* before link_request() */ 3719 3720 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3721 link_request(osd, req); 3722 if (!req->r_linger) { 3723 if (!osd_homeless(osd) && !req->r_t.paused) 3724 send_request(req); 3725 } else { 3726 cancel_linger_request(req); 3727 } 3728 } 3729 3730 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3731 if (!osd_homeless(lreq->osd)) 3732 send_linger(lreq); 3733 3734 list_del_init(&lreq->scan_item); 3735 } 3736 } 3737 3738 /* 3739 * Process updated osd map. 3740 * 3741 * The message contains any number of incremental and full maps, normally 3742 * indicating some sort of topology change in the cluster. Kick requests 3743 * off to different OSDs as needed. 3744 */ 3745 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3746 { 3747 void *p = msg->front.iov_base; 3748 void *const end = p + msg->front.iov_len; 3749 u32 nr_maps, maplen; 3750 u32 epoch; 3751 struct ceph_fsid fsid; 3752 struct rb_root need_resend = RB_ROOT; 3753 LIST_HEAD(need_resend_linger); 3754 bool handled_incremental = false; 3755 bool was_pauserd, was_pausewr; 3756 bool pauserd, pausewr; 3757 int err; 3758 3759 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3760 down_write(&osdc->lock); 3761 3762 /* verify fsid */ 3763 ceph_decode_need(&p, end, sizeof(fsid), bad); 3764 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3765 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3766 goto bad; 3767 3768 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3769 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3770 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3771 have_pool_full(osdc); 3772 3773 /* incremental maps */ 3774 ceph_decode_32_safe(&p, end, nr_maps, bad); 3775 dout(" %d inc maps\n", nr_maps); 3776 while (nr_maps > 0) { 3777 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3778 epoch = ceph_decode_32(&p); 3779 maplen = ceph_decode_32(&p); 3780 ceph_decode_need(&p, end, maplen, bad); 3781 if (osdc->osdmap->epoch && 3782 osdc->osdmap->epoch + 1 == epoch) { 3783 dout("applying incremental map %u len %d\n", 3784 epoch, maplen); 3785 err = handle_one_map(osdc, p, p + maplen, true, 3786 &need_resend, &need_resend_linger); 3787 if (err) 3788 goto bad; 3789 handled_incremental = true; 3790 } else { 3791 dout("ignoring incremental map %u len %d\n", 3792 epoch, maplen); 3793 } 3794 p += maplen; 3795 nr_maps--; 3796 } 3797 if (handled_incremental) 3798 goto done; 3799 3800 /* full maps */ 3801 ceph_decode_32_safe(&p, end, nr_maps, bad); 3802 dout(" %d full maps\n", nr_maps); 3803 while (nr_maps) { 3804 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3805 epoch = ceph_decode_32(&p); 3806 maplen = ceph_decode_32(&p); 3807 ceph_decode_need(&p, end, maplen, bad); 3808 if (nr_maps > 1) { 3809 dout("skipping non-latest full map %u len %d\n", 3810 epoch, maplen); 3811 } else if (osdc->osdmap->epoch >= epoch) { 3812 dout("skipping full map %u len %d, " 3813 "older than our %u\n", epoch, maplen, 3814 osdc->osdmap->epoch); 3815 } else { 3816 dout("taking full map %u len %d\n", epoch, maplen); 3817 err = handle_one_map(osdc, p, p + maplen, false, 3818 &need_resend, &need_resend_linger); 3819 if (err) 3820 goto bad; 3821 } 3822 p += maplen; 3823 nr_maps--; 3824 } 3825 3826 done: 3827 /* 3828 * subscribe to subsequent osdmap updates if full to ensure 3829 * we find out when we are no longer full and stop returning 3830 * ENOSPC. 3831 */ 3832 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3833 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3834 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3835 have_pool_full(osdc); 3836 if (was_pauserd || was_pausewr || pauserd || pausewr || 3837 osdc->osdmap->epoch < osdc->epoch_barrier) 3838 maybe_request_map(osdc); 3839 3840 kick_requests(osdc, &need_resend, &need_resend_linger); 3841 3842 ceph_osdc_abort_on_full(osdc); 3843 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 3844 osdc->osdmap->epoch); 3845 up_write(&osdc->lock); 3846 wake_up_all(&osdc->client->auth_wq); 3847 return; 3848 3849 bad: 3850 pr_err("osdc handle_map corrupt msg\n"); 3851 ceph_msg_dump(msg); 3852 up_write(&osdc->lock); 3853 } 3854 3855 /* 3856 * Resubmit requests pending on the given osd. 3857 */ 3858 static void kick_osd_requests(struct ceph_osd *osd) 3859 { 3860 struct rb_node *n; 3861 3862 clear_backoffs(osd); 3863 3864 for (n = rb_first(&osd->o_requests); n; ) { 3865 struct ceph_osd_request *req = 3866 rb_entry(n, struct ceph_osd_request, r_node); 3867 3868 n = rb_next(n); /* cancel_linger_request() */ 3869 3870 if (!req->r_linger) { 3871 if (!req->r_t.paused) 3872 send_request(req); 3873 } else { 3874 cancel_linger_request(req); 3875 } 3876 } 3877 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 3878 struct ceph_osd_linger_request *lreq = 3879 rb_entry(n, struct ceph_osd_linger_request, node); 3880 3881 send_linger(lreq); 3882 } 3883 } 3884 3885 /* 3886 * If the osd connection drops, we need to resubmit all requests. 3887 */ 3888 static void osd_fault(struct ceph_connection *con) 3889 { 3890 struct ceph_osd *osd = con->private; 3891 struct ceph_osd_client *osdc = osd->o_osdc; 3892 3893 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 3894 3895 down_write(&osdc->lock); 3896 if (!osd_registered(osd)) { 3897 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3898 goto out_unlock; 3899 } 3900 3901 if (!reopen_osd(osd)) 3902 kick_osd_requests(osd); 3903 maybe_request_map(osdc); 3904 3905 out_unlock: 3906 up_write(&osdc->lock); 3907 } 3908 3909 struct MOSDBackoff { 3910 struct ceph_spg spgid; 3911 u32 map_epoch; 3912 u8 op; 3913 u64 id; 3914 struct ceph_hobject_id *begin; 3915 struct ceph_hobject_id *end; 3916 }; 3917 3918 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m) 3919 { 3920 void *p = msg->front.iov_base; 3921 void *const end = p + msg->front.iov_len; 3922 u8 struct_v; 3923 u32 struct_len; 3924 int ret; 3925 3926 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len); 3927 if (ret) 3928 return ret; 3929 3930 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid); 3931 if (ret) 3932 return ret; 3933 3934 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval); 3935 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval); 3936 ceph_decode_8_safe(&p, end, m->op, e_inval); 3937 ceph_decode_64_safe(&p, end, m->id, e_inval); 3938 3939 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO); 3940 if (!m->begin) 3941 return -ENOMEM; 3942 3943 ret = decode_hoid(&p, end, m->begin); 3944 if (ret) { 3945 free_hoid(m->begin); 3946 return ret; 3947 } 3948 3949 m->end = kzalloc(sizeof(*m->end), GFP_NOIO); 3950 if (!m->end) { 3951 free_hoid(m->begin); 3952 return -ENOMEM; 3953 } 3954 3955 ret = decode_hoid(&p, end, m->end); 3956 if (ret) { 3957 free_hoid(m->begin); 3958 free_hoid(m->end); 3959 return ret; 3960 } 3961 3962 return 0; 3963 3964 e_inval: 3965 return -EINVAL; 3966 } 3967 3968 static struct ceph_msg *create_backoff_message( 3969 const struct ceph_osd_backoff *backoff, 3970 u32 map_epoch) 3971 { 3972 struct ceph_msg *msg; 3973 void *p, *end; 3974 int msg_size; 3975 3976 msg_size = CEPH_ENCODING_START_BLK_LEN + 3977 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 3978 msg_size += 4 + 1 + 8; /* map_epoch, op, id */ 3979 msg_size += CEPH_ENCODING_START_BLK_LEN + 3980 hoid_encoding_size(backoff->begin); 3981 msg_size += CEPH_ENCODING_START_BLK_LEN + 3982 hoid_encoding_size(backoff->end); 3983 3984 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true); 3985 if (!msg) 3986 return NULL; 3987 3988 p = msg->front.iov_base; 3989 end = p + msg->front_alloc_len; 3990 3991 encode_spgid(&p, &backoff->spgid); 3992 ceph_encode_32(&p, map_epoch); 3993 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK); 3994 ceph_encode_64(&p, backoff->id); 3995 encode_hoid(&p, end, backoff->begin); 3996 encode_hoid(&p, end, backoff->end); 3997 BUG_ON(p != end); 3998 3999 msg->front.iov_len = p - msg->front.iov_base; 4000 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */ 4001 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 4002 4003 return msg; 4004 } 4005 4006 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m) 4007 { 4008 struct ceph_spg_mapping *spg; 4009 struct ceph_osd_backoff *backoff; 4010 struct ceph_msg *msg; 4011 4012 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4013 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4014 4015 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid); 4016 if (!spg) { 4017 spg = alloc_spg_mapping(); 4018 if (!spg) { 4019 pr_err("%s failed to allocate spg\n", __func__); 4020 return; 4021 } 4022 spg->spgid = m->spgid; /* struct */ 4023 insert_spg_mapping(&osd->o_backoff_mappings, spg); 4024 } 4025 4026 backoff = alloc_backoff(); 4027 if (!backoff) { 4028 pr_err("%s failed to allocate backoff\n", __func__); 4029 return; 4030 } 4031 backoff->spgid = m->spgid; /* struct */ 4032 backoff->id = m->id; 4033 backoff->begin = m->begin; 4034 m->begin = NULL; /* backoff now owns this */ 4035 backoff->end = m->end; 4036 m->end = NULL; /* ditto */ 4037 4038 insert_backoff(&spg->backoffs, backoff); 4039 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4040 4041 /* 4042 * Ack with original backoff's epoch so that the OSD can 4043 * discard this if there was a PG split. 4044 */ 4045 msg = create_backoff_message(backoff, m->map_epoch); 4046 if (!msg) { 4047 pr_err("%s failed to allocate msg\n", __func__); 4048 return; 4049 } 4050 ceph_con_send(&osd->o_con, msg); 4051 } 4052 4053 static bool target_contained_by(const struct ceph_osd_request_target *t, 4054 const struct ceph_hobject_id *begin, 4055 const struct ceph_hobject_id *end) 4056 { 4057 struct ceph_hobject_id hoid; 4058 int cmp; 4059 4060 hoid_fill_from_target(&hoid, t); 4061 cmp = hoid_compare(&hoid, begin); 4062 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0); 4063 } 4064 4065 static void handle_backoff_unblock(struct ceph_osd *osd, 4066 const struct MOSDBackoff *m) 4067 { 4068 struct ceph_spg_mapping *spg; 4069 struct ceph_osd_backoff *backoff; 4070 struct rb_node *n; 4071 4072 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4073 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4074 4075 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id); 4076 if (!backoff) { 4077 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n", 4078 __func__, osd->o_osd, m->spgid.pgid.pool, 4079 m->spgid.pgid.seed, m->spgid.shard, m->id); 4080 return; 4081 } 4082 4083 if (hoid_compare(backoff->begin, m->begin) && 4084 hoid_compare(backoff->end, m->end)) { 4085 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n", 4086 __func__, osd->o_osd, m->spgid.pgid.pool, 4087 m->spgid.pgid.seed, m->spgid.shard, m->id); 4088 /* unblock it anyway... */ 4089 } 4090 4091 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid); 4092 BUG_ON(!spg); 4093 4094 erase_backoff(&spg->backoffs, backoff); 4095 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4096 free_backoff(backoff); 4097 4098 if (RB_EMPTY_ROOT(&spg->backoffs)) { 4099 erase_spg_mapping(&osd->o_backoff_mappings, spg); 4100 free_spg_mapping(spg); 4101 } 4102 4103 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 4104 struct ceph_osd_request *req = 4105 rb_entry(n, struct ceph_osd_request, r_node); 4106 4107 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) { 4108 /* 4109 * Match against @m, not @backoff -- the PG may 4110 * have split on the OSD. 4111 */ 4112 if (target_contained_by(&req->r_t, m->begin, m->end)) { 4113 /* 4114 * If no other installed backoff applies, 4115 * resend. 4116 */ 4117 send_request(req); 4118 } 4119 } 4120 } 4121 } 4122 4123 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg) 4124 { 4125 struct ceph_osd_client *osdc = osd->o_osdc; 4126 struct MOSDBackoff m; 4127 int ret; 4128 4129 down_read(&osdc->lock); 4130 if (!osd_registered(osd)) { 4131 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4132 up_read(&osdc->lock); 4133 return; 4134 } 4135 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 4136 4137 mutex_lock(&osd->lock); 4138 ret = decode_MOSDBackoff(msg, &m); 4139 if (ret) { 4140 pr_err("failed to decode MOSDBackoff: %d\n", ret); 4141 ceph_msg_dump(msg); 4142 goto out_unlock; 4143 } 4144 4145 switch (m.op) { 4146 case CEPH_OSD_BACKOFF_OP_BLOCK: 4147 handle_backoff_block(osd, &m); 4148 break; 4149 case CEPH_OSD_BACKOFF_OP_UNBLOCK: 4150 handle_backoff_unblock(osd, &m); 4151 break; 4152 default: 4153 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op); 4154 } 4155 4156 free_hoid(m.begin); 4157 free_hoid(m.end); 4158 4159 out_unlock: 4160 mutex_unlock(&osd->lock); 4161 up_read(&osdc->lock); 4162 } 4163 4164 /* 4165 * Process osd watch notifications 4166 */ 4167 static void handle_watch_notify(struct ceph_osd_client *osdc, 4168 struct ceph_msg *msg) 4169 { 4170 void *p = msg->front.iov_base; 4171 void *const end = p + msg->front.iov_len; 4172 struct ceph_osd_linger_request *lreq; 4173 struct linger_work *lwork; 4174 u8 proto_ver, opcode; 4175 u64 cookie, notify_id; 4176 u64 notifier_id = 0; 4177 s32 return_code = 0; 4178 void *payload = NULL; 4179 u32 payload_len = 0; 4180 4181 ceph_decode_8_safe(&p, end, proto_ver, bad); 4182 ceph_decode_8_safe(&p, end, opcode, bad); 4183 ceph_decode_64_safe(&p, end, cookie, bad); 4184 p += 8; /* skip ver */ 4185 ceph_decode_64_safe(&p, end, notify_id, bad); 4186 4187 if (proto_ver >= 1) { 4188 ceph_decode_32_safe(&p, end, payload_len, bad); 4189 ceph_decode_need(&p, end, payload_len, bad); 4190 payload = p; 4191 p += payload_len; 4192 } 4193 4194 if (le16_to_cpu(msg->hdr.version) >= 2) 4195 ceph_decode_32_safe(&p, end, return_code, bad); 4196 4197 if (le16_to_cpu(msg->hdr.version) >= 3) 4198 ceph_decode_64_safe(&p, end, notifier_id, bad); 4199 4200 down_read(&osdc->lock); 4201 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 4202 if (!lreq) { 4203 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 4204 cookie); 4205 goto out_unlock_osdc; 4206 } 4207 4208 mutex_lock(&lreq->lock); 4209 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 4210 opcode, cookie, lreq, lreq->is_watch); 4211 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 4212 if (!lreq->last_error) { 4213 lreq->last_error = -ENOTCONN; 4214 queue_watch_error(lreq); 4215 } 4216 } else if (!lreq->is_watch) { 4217 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 4218 if (lreq->notify_id && lreq->notify_id != notify_id) { 4219 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 4220 lreq->notify_id, notify_id); 4221 } else if (!completion_done(&lreq->notify_finish_wait)) { 4222 struct ceph_msg_data *data = 4223 list_first_entry_or_null(&msg->data, 4224 struct ceph_msg_data, 4225 links); 4226 4227 if (data) { 4228 if (lreq->preply_pages) { 4229 WARN_ON(data->type != 4230 CEPH_MSG_DATA_PAGES); 4231 *lreq->preply_pages = data->pages; 4232 *lreq->preply_len = data->length; 4233 } else { 4234 ceph_release_page_vector(data->pages, 4235 calc_pages_for(0, data->length)); 4236 } 4237 } 4238 lreq->notify_finish_error = return_code; 4239 complete_all(&lreq->notify_finish_wait); 4240 } 4241 } else { 4242 /* CEPH_WATCH_EVENT_NOTIFY */ 4243 lwork = lwork_alloc(lreq, do_watch_notify); 4244 if (!lwork) { 4245 pr_err("failed to allocate notify-lwork\n"); 4246 goto out_unlock_lreq; 4247 } 4248 4249 lwork->notify.notify_id = notify_id; 4250 lwork->notify.notifier_id = notifier_id; 4251 lwork->notify.payload = payload; 4252 lwork->notify.payload_len = payload_len; 4253 lwork->notify.msg = ceph_msg_get(msg); 4254 lwork_queue(lwork); 4255 } 4256 4257 out_unlock_lreq: 4258 mutex_unlock(&lreq->lock); 4259 out_unlock_osdc: 4260 up_read(&osdc->lock); 4261 return; 4262 4263 bad: 4264 pr_err("osdc handle_watch_notify corrupt msg\n"); 4265 } 4266 4267 /* 4268 * Register request, send initial attempt. 4269 */ 4270 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 4271 struct ceph_osd_request *req, 4272 bool nofail) 4273 { 4274 down_read(&osdc->lock); 4275 submit_request(req, false); 4276 up_read(&osdc->lock); 4277 4278 return 0; 4279 } 4280 EXPORT_SYMBOL(ceph_osdc_start_request); 4281 4282 /* 4283 * Unregister a registered request. The request is not completed: 4284 * ->r_result isn't set and __complete_request() isn't called. 4285 */ 4286 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 4287 { 4288 struct ceph_osd_client *osdc = req->r_osdc; 4289 4290 down_write(&osdc->lock); 4291 if (req->r_osd) 4292 cancel_request(req); 4293 up_write(&osdc->lock); 4294 } 4295 EXPORT_SYMBOL(ceph_osdc_cancel_request); 4296 4297 /* 4298 * @timeout: in jiffies, 0 means "wait forever" 4299 */ 4300 static int wait_request_timeout(struct ceph_osd_request *req, 4301 unsigned long timeout) 4302 { 4303 long left; 4304 4305 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 4306 left = wait_for_completion_killable_timeout(&req->r_completion, 4307 ceph_timeout_jiffies(timeout)); 4308 if (left <= 0) { 4309 left = left ?: -ETIMEDOUT; 4310 ceph_osdc_cancel_request(req); 4311 } else { 4312 left = req->r_result; /* completed */ 4313 } 4314 4315 return left; 4316 } 4317 4318 /* 4319 * wait for a request to complete 4320 */ 4321 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 4322 struct ceph_osd_request *req) 4323 { 4324 return wait_request_timeout(req, 0); 4325 } 4326 EXPORT_SYMBOL(ceph_osdc_wait_request); 4327 4328 /* 4329 * sync - wait for all in-flight requests to flush. avoid starvation. 4330 */ 4331 void ceph_osdc_sync(struct ceph_osd_client *osdc) 4332 { 4333 struct rb_node *n, *p; 4334 u64 last_tid = atomic64_read(&osdc->last_tid); 4335 4336 again: 4337 down_read(&osdc->lock); 4338 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 4339 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 4340 4341 mutex_lock(&osd->lock); 4342 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 4343 struct ceph_osd_request *req = 4344 rb_entry(p, struct ceph_osd_request, r_node); 4345 4346 if (req->r_tid > last_tid) 4347 break; 4348 4349 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 4350 continue; 4351 4352 ceph_osdc_get_request(req); 4353 mutex_unlock(&osd->lock); 4354 up_read(&osdc->lock); 4355 dout("%s waiting on req %p tid %llu last_tid %llu\n", 4356 __func__, req, req->r_tid, last_tid); 4357 wait_for_completion(&req->r_completion); 4358 ceph_osdc_put_request(req); 4359 goto again; 4360 } 4361 4362 mutex_unlock(&osd->lock); 4363 } 4364 4365 up_read(&osdc->lock); 4366 dout("%s done last_tid %llu\n", __func__, last_tid); 4367 } 4368 EXPORT_SYMBOL(ceph_osdc_sync); 4369 4370 static struct ceph_osd_request * 4371 alloc_linger_request(struct ceph_osd_linger_request *lreq) 4372 { 4373 struct ceph_osd_request *req; 4374 4375 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 4376 if (!req) 4377 return NULL; 4378 4379 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4380 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4381 4382 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 4383 ceph_osdc_put_request(req); 4384 return NULL; 4385 } 4386 4387 return req; 4388 } 4389 4390 /* 4391 * Returns a handle, caller owns a ref. 4392 */ 4393 struct ceph_osd_linger_request * 4394 ceph_osdc_watch(struct ceph_osd_client *osdc, 4395 struct ceph_object_id *oid, 4396 struct ceph_object_locator *oloc, 4397 rados_watchcb2_t wcb, 4398 rados_watcherrcb_t errcb, 4399 void *data) 4400 { 4401 struct ceph_osd_linger_request *lreq; 4402 int ret; 4403 4404 lreq = linger_alloc(osdc); 4405 if (!lreq) 4406 return ERR_PTR(-ENOMEM); 4407 4408 lreq->is_watch = true; 4409 lreq->wcb = wcb; 4410 lreq->errcb = errcb; 4411 lreq->data = data; 4412 lreq->watch_valid_thru = jiffies; 4413 4414 ceph_oid_copy(&lreq->t.base_oid, oid); 4415 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4416 lreq->t.flags = CEPH_OSD_FLAG_WRITE; 4417 ktime_get_real_ts(&lreq->mtime); 4418 4419 lreq->reg_req = alloc_linger_request(lreq); 4420 if (!lreq->reg_req) { 4421 ret = -ENOMEM; 4422 goto err_put_lreq; 4423 } 4424 4425 lreq->ping_req = alloc_linger_request(lreq); 4426 if (!lreq->ping_req) { 4427 ret = -ENOMEM; 4428 goto err_put_lreq; 4429 } 4430 4431 down_write(&osdc->lock); 4432 linger_register(lreq); /* before osd_req_op_* */ 4433 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id, 4434 CEPH_OSD_WATCH_OP_WATCH); 4435 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id, 4436 CEPH_OSD_WATCH_OP_PING); 4437 linger_submit(lreq); 4438 up_write(&osdc->lock); 4439 4440 ret = linger_reg_commit_wait(lreq); 4441 if (ret) { 4442 linger_cancel(lreq); 4443 goto err_put_lreq; 4444 } 4445 4446 return lreq; 4447 4448 err_put_lreq: 4449 linger_put(lreq); 4450 return ERR_PTR(ret); 4451 } 4452 EXPORT_SYMBOL(ceph_osdc_watch); 4453 4454 /* 4455 * Releases a ref. 4456 * 4457 * Times out after mount_timeout to preserve rbd unmap behaviour 4458 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 4459 * with mount_timeout"). 4460 */ 4461 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 4462 struct ceph_osd_linger_request *lreq) 4463 { 4464 struct ceph_options *opts = osdc->client->options; 4465 struct ceph_osd_request *req; 4466 int ret; 4467 4468 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4469 if (!req) 4470 return -ENOMEM; 4471 4472 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4473 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4474 req->r_flags = CEPH_OSD_FLAG_WRITE; 4475 ktime_get_real_ts(&req->r_mtime); 4476 osd_req_op_watch_init(req, 0, lreq->linger_id, 4477 CEPH_OSD_WATCH_OP_UNWATCH); 4478 4479 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4480 if (ret) 4481 goto out_put_req; 4482 4483 ceph_osdc_start_request(osdc, req, false); 4484 linger_cancel(lreq); 4485 linger_put(lreq); 4486 ret = wait_request_timeout(req, opts->mount_timeout); 4487 4488 out_put_req: 4489 ceph_osdc_put_request(req); 4490 return ret; 4491 } 4492 EXPORT_SYMBOL(ceph_osdc_unwatch); 4493 4494 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 4495 u64 notify_id, u64 cookie, void *payload, 4496 size_t payload_len) 4497 { 4498 struct ceph_osd_req_op *op; 4499 struct ceph_pagelist *pl; 4500 int ret; 4501 4502 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 4503 4504 pl = kmalloc(sizeof(*pl), GFP_NOIO); 4505 if (!pl) 4506 return -ENOMEM; 4507 4508 ceph_pagelist_init(pl); 4509 ret = ceph_pagelist_encode_64(pl, notify_id); 4510 ret |= ceph_pagelist_encode_64(pl, cookie); 4511 if (payload) { 4512 ret |= ceph_pagelist_encode_32(pl, payload_len); 4513 ret |= ceph_pagelist_append(pl, payload, payload_len); 4514 } else { 4515 ret |= ceph_pagelist_encode_32(pl, 0); 4516 } 4517 if (ret) { 4518 ceph_pagelist_release(pl); 4519 return -ENOMEM; 4520 } 4521 4522 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 4523 op->indata_len = pl->length; 4524 return 0; 4525 } 4526 4527 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 4528 struct ceph_object_id *oid, 4529 struct ceph_object_locator *oloc, 4530 u64 notify_id, 4531 u64 cookie, 4532 void *payload, 4533 size_t payload_len) 4534 { 4535 struct ceph_osd_request *req; 4536 int ret; 4537 4538 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4539 if (!req) 4540 return -ENOMEM; 4541 4542 ceph_oid_copy(&req->r_base_oid, oid); 4543 ceph_oloc_copy(&req->r_base_oloc, oloc); 4544 req->r_flags = CEPH_OSD_FLAG_READ; 4545 4546 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4547 if (ret) 4548 goto out_put_req; 4549 4550 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 4551 payload_len); 4552 if (ret) 4553 goto out_put_req; 4554 4555 ceph_osdc_start_request(osdc, req, false); 4556 ret = ceph_osdc_wait_request(osdc, req); 4557 4558 out_put_req: 4559 ceph_osdc_put_request(req); 4560 return ret; 4561 } 4562 EXPORT_SYMBOL(ceph_osdc_notify_ack); 4563 4564 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 4565 u64 cookie, u32 prot_ver, u32 timeout, 4566 void *payload, size_t payload_len) 4567 { 4568 struct ceph_osd_req_op *op; 4569 struct ceph_pagelist *pl; 4570 int ret; 4571 4572 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 4573 op->notify.cookie = cookie; 4574 4575 pl = kmalloc(sizeof(*pl), GFP_NOIO); 4576 if (!pl) 4577 return -ENOMEM; 4578 4579 ceph_pagelist_init(pl); 4580 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 4581 ret |= ceph_pagelist_encode_32(pl, timeout); 4582 ret |= ceph_pagelist_encode_32(pl, payload_len); 4583 ret |= ceph_pagelist_append(pl, payload, payload_len); 4584 if (ret) { 4585 ceph_pagelist_release(pl); 4586 return -ENOMEM; 4587 } 4588 4589 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 4590 op->indata_len = pl->length; 4591 return 0; 4592 } 4593 4594 /* 4595 * @timeout: in seconds 4596 * 4597 * @preply_{pages,len} are initialized both on success and error. 4598 * The caller is responsible for: 4599 * 4600 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 4601 */ 4602 int ceph_osdc_notify(struct ceph_osd_client *osdc, 4603 struct ceph_object_id *oid, 4604 struct ceph_object_locator *oloc, 4605 void *payload, 4606 size_t payload_len, 4607 u32 timeout, 4608 struct page ***preply_pages, 4609 size_t *preply_len) 4610 { 4611 struct ceph_osd_linger_request *lreq; 4612 struct page **pages; 4613 int ret; 4614 4615 WARN_ON(!timeout); 4616 if (preply_pages) { 4617 *preply_pages = NULL; 4618 *preply_len = 0; 4619 } 4620 4621 lreq = linger_alloc(osdc); 4622 if (!lreq) 4623 return -ENOMEM; 4624 4625 lreq->preply_pages = preply_pages; 4626 lreq->preply_len = preply_len; 4627 4628 ceph_oid_copy(&lreq->t.base_oid, oid); 4629 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4630 lreq->t.flags = CEPH_OSD_FLAG_READ; 4631 4632 lreq->reg_req = alloc_linger_request(lreq); 4633 if (!lreq->reg_req) { 4634 ret = -ENOMEM; 4635 goto out_put_lreq; 4636 } 4637 4638 /* for notify_id */ 4639 pages = ceph_alloc_page_vector(1, GFP_NOIO); 4640 if (IS_ERR(pages)) { 4641 ret = PTR_ERR(pages); 4642 goto out_put_lreq; 4643 } 4644 4645 down_write(&osdc->lock); 4646 linger_register(lreq); /* before osd_req_op_* */ 4647 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1, 4648 timeout, payload, payload_len); 4649 if (ret) { 4650 linger_unregister(lreq); 4651 up_write(&osdc->lock); 4652 ceph_release_page_vector(pages, 1); 4653 goto out_put_lreq; 4654 } 4655 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 4656 response_data), 4657 pages, PAGE_SIZE, 0, false, true); 4658 linger_submit(lreq); 4659 up_write(&osdc->lock); 4660 4661 ret = linger_reg_commit_wait(lreq); 4662 if (!ret) 4663 ret = linger_notify_finish_wait(lreq); 4664 else 4665 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 4666 4667 linger_cancel(lreq); 4668 out_put_lreq: 4669 linger_put(lreq); 4670 return ret; 4671 } 4672 EXPORT_SYMBOL(ceph_osdc_notify); 4673 4674 /* 4675 * Return the number of milliseconds since the watch was last 4676 * confirmed, or an error. If there is an error, the watch is no 4677 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 4678 */ 4679 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 4680 struct ceph_osd_linger_request *lreq) 4681 { 4682 unsigned long stamp, age; 4683 int ret; 4684 4685 down_read(&osdc->lock); 4686 mutex_lock(&lreq->lock); 4687 stamp = lreq->watch_valid_thru; 4688 if (!list_empty(&lreq->pending_lworks)) { 4689 struct linger_work *lwork = 4690 list_first_entry(&lreq->pending_lworks, 4691 struct linger_work, 4692 pending_item); 4693 4694 if (time_before(lwork->queued_stamp, stamp)) 4695 stamp = lwork->queued_stamp; 4696 } 4697 age = jiffies - stamp; 4698 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 4699 lreq, lreq->linger_id, age, lreq->last_error); 4700 /* we are truncating to msecs, so return a safe upper bound */ 4701 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 4702 4703 mutex_unlock(&lreq->lock); 4704 up_read(&osdc->lock); 4705 return ret; 4706 } 4707 4708 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 4709 { 4710 u8 struct_v; 4711 u32 struct_len; 4712 int ret; 4713 4714 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 4715 &struct_v, &struct_len); 4716 if (ret) 4717 return ret; 4718 4719 ceph_decode_copy(p, &item->name, sizeof(item->name)); 4720 item->cookie = ceph_decode_64(p); 4721 *p += 4; /* skip timeout_seconds */ 4722 if (struct_v >= 2) { 4723 ceph_decode_copy(p, &item->addr, sizeof(item->addr)); 4724 ceph_decode_addr(&item->addr); 4725 } 4726 4727 dout("%s %s%llu cookie %llu addr %s\n", __func__, 4728 ENTITY_NAME(item->name), item->cookie, 4729 ceph_pr_addr(&item->addr.in_addr)); 4730 return 0; 4731 } 4732 4733 static int decode_watchers(void **p, void *end, 4734 struct ceph_watch_item **watchers, 4735 u32 *num_watchers) 4736 { 4737 u8 struct_v; 4738 u32 struct_len; 4739 int i; 4740 int ret; 4741 4742 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 4743 &struct_v, &struct_len); 4744 if (ret) 4745 return ret; 4746 4747 *num_watchers = ceph_decode_32(p); 4748 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 4749 if (!*watchers) 4750 return -ENOMEM; 4751 4752 for (i = 0; i < *num_watchers; i++) { 4753 ret = decode_watcher(p, end, *watchers + i); 4754 if (ret) { 4755 kfree(*watchers); 4756 return ret; 4757 } 4758 } 4759 4760 return 0; 4761 } 4762 4763 /* 4764 * On success, the caller is responsible for: 4765 * 4766 * kfree(watchers); 4767 */ 4768 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 4769 struct ceph_object_id *oid, 4770 struct ceph_object_locator *oloc, 4771 struct ceph_watch_item **watchers, 4772 u32 *num_watchers) 4773 { 4774 struct ceph_osd_request *req; 4775 struct page **pages; 4776 int ret; 4777 4778 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4779 if (!req) 4780 return -ENOMEM; 4781 4782 ceph_oid_copy(&req->r_base_oid, oid); 4783 ceph_oloc_copy(&req->r_base_oloc, oloc); 4784 req->r_flags = CEPH_OSD_FLAG_READ; 4785 4786 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4787 if (ret) 4788 goto out_put_req; 4789 4790 pages = ceph_alloc_page_vector(1, GFP_NOIO); 4791 if (IS_ERR(pages)) { 4792 ret = PTR_ERR(pages); 4793 goto out_put_req; 4794 } 4795 4796 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 4797 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 4798 response_data), 4799 pages, PAGE_SIZE, 0, false, true); 4800 4801 ceph_osdc_start_request(osdc, req, false); 4802 ret = ceph_osdc_wait_request(osdc, req); 4803 if (ret >= 0) { 4804 void *p = page_address(pages[0]); 4805 void *const end = p + req->r_ops[0].outdata_len; 4806 4807 ret = decode_watchers(&p, end, watchers, num_watchers); 4808 } 4809 4810 out_put_req: 4811 ceph_osdc_put_request(req); 4812 return ret; 4813 } 4814 EXPORT_SYMBOL(ceph_osdc_list_watchers); 4815 4816 /* 4817 * Call all pending notify callbacks - for use after a watch is 4818 * unregistered, to make sure no more callbacks for it will be invoked 4819 */ 4820 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 4821 { 4822 dout("%s osdc %p\n", __func__, osdc); 4823 flush_workqueue(osdc->notify_wq); 4824 } 4825 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 4826 4827 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 4828 { 4829 down_read(&osdc->lock); 4830 maybe_request_map(osdc); 4831 up_read(&osdc->lock); 4832 } 4833 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 4834 4835 /* 4836 * Execute an OSD class method on an object. 4837 * 4838 * @flags: CEPH_OSD_FLAG_* 4839 * @resp_len: in/out param for reply length 4840 */ 4841 int ceph_osdc_call(struct ceph_osd_client *osdc, 4842 struct ceph_object_id *oid, 4843 struct ceph_object_locator *oloc, 4844 const char *class, const char *method, 4845 unsigned int flags, 4846 struct page *req_page, size_t req_len, 4847 struct page *resp_page, size_t *resp_len) 4848 { 4849 struct ceph_osd_request *req; 4850 int ret; 4851 4852 if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE)) 4853 return -E2BIG; 4854 4855 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4856 if (!req) 4857 return -ENOMEM; 4858 4859 ceph_oid_copy(&req->r_base_oid, oid); 4860 ceph_oloc_copy(&req->r_base_oloc, oloc); 4861 req->r_flags = flags; 4862 4863 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4864 if (ret) 4865 goto out_put_req; 4866 4867 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method); 4868 if (req_page) 4869 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 4870 0, false, false); 4871 if (resp_page) 4872 osd_req_op_cls_response_data_pages(req, 0, &resp_page, 4873 *resp_len, 0, false, false); 4874 4875 ceph_osdc_start_request(osdc, req, false); 4876 ret = ceph_osdc_wait_request(osdc, req); 4877 if (ret >= 0) { 4878 ret = req->r_ops[0].rval; 4879 if (resp_page) 4880 *resp_len = req->r_ops[0].outdata_len; 4881 } 4882 4883 out_put_req: 4884 ceph_osdc_put_request(req); 4885 return ret; 4886 } 4887 EXPORT_SYMBOL(ceph_osdc_call); 4888 4889 /* 4890 * init, shutdown 4891 */ 4892 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 4893 { 4894 int err; 4895 4896 dout("init\n"); 4897 osdc->client = client; 4898 init_rwsem(&osdc->lock); 4899 osdc->osds = RB_ROOT; 4900 INIT_LIST_HEAD(&osdc->osd_lru); 4901 spin_lock_init(&osdc->osd_lru_lock); 4902 osd_init(&osdc->homeless_osd); 4903 osdc->homeless_osd.o_osdc = osdc; 4904 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 4905 osdc->last_linger_id = CEPH_LINGER_ID_START; 4906 osdc->linger_requests = RB_ROOT; 4907 osdc->map_checks = RB_ROOT; 4908 osdc->linger_map_checks = RB_ROOT; 4909 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 4910 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 4911 4912 err = -ENOMEM; 4913 osdc->osdmap = ceph_osdmap_alloc(); 4914 if (!osdc->osdmap) 4915 goto out; 4916 4917 osdc->req_mempool = mempool_create_slab_pool(10, 4918 ceph_osd_request_cache); 4919 if (!osdc->req_mempool) 4920 goto out_map; 4921 4922 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 4923 PAGE_SIZE, 10, true, "osd_op"); 4924 if (err < 0) 4925 goto out_mempool; 4926 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 4927 PAGE_SIZE, 10, true, "osd_op_reply"); 4928 if (err < 0) 4929 goto out_msgpool; 4930 4931 err = -ENOMEM; 4932 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 4933 if (!osdc->notify_wq) 4934 goto out_msgpool_reply; 4935 4936 schedule_delayed_work(&osdc->timeout_work, 4937 osdc->client->options->osd_keepalive_timeout); 4938 schedule_delayed_work(&osdc->osds_timeout_work, 4939 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 4940 4941 return 0; 4942 4943 out_msgpool_reply: 4944 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4945 out_msgpool: 4946 ceph_msgpool_destroy(&osdc->msgpool_op); 4947 out_mempool: 4948 mempool_destroy(osdc->req_mempool); 4949 out_map: 4950 ceph_osdmap_destroy(osdc->osdmap); 4951 out: 4952 return err; 4953 } 4954 4955 void ceph_osdc_stop(struct ceph_osd_client *osdc) 4956 { 4957 flush_workqueue(osdc->notify_wq); 4958 destroy_workqueue(osdc->notify_wq); 4959 cancel_delayed_work_sync(&osdc->timeout_work); 4960 cancel_delayed_work_sync(&osdc->osds_timeout_work); 4961 4962 down_write(&osdc->lock); 4963 while (!RB_EMPTY_ROOT(&osdc->osds)) { 4964 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 4965 struct ceph_osd, o_node); 4966 close_osd(osd); 4967 } 4968 up_write(&osdc->lock); 4969 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1); 4970 osd_cleanup(&osdc->homeless_osd); 4971 4972 WARN_ON(!list_empty(&osdc->osd_lru)); 4973 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 4974 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 4975 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 4976 WARN_ON(atomic_read(&osdc->num_requests)); 4977 WARN_ON(atomic_read(&osdc->num_homeless)); 4978 4979 ceph_osdmap_destroy(osdc->osdmap); 4980 mempool_destroy(osdc->req_mempool); 4981 ceph_msgpool_destroy(&osdc->msgpool_op); 4982 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4983 } 4984 4985 /* 4986 * Read some contiguous pages. If we cross a stripe boundary, shorten 4987 * *plen. Return number of bytes read, or error. 4988 */ 4989 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 4990 struct ceph_vino vino, struct ceph_file_layout *layout, 4991 u64 off, u64 *plen, 4992 u32 truncate_seq, u64 truncate_size, 4993 struct page **pages, int num_pages, int page_align) 4994 { 4995 struct ceph_osd_request *req; 4996 int rc = 0; 4997 4998 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 4999 vino.snap, off, *plen); 5000 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 5001 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 5002 NULL, truncate_seq, truncate_size, 5003 false); 5004 if (IS_ERR(req)) 5005 return PTR_ERR(req); 5006 5007 /* it may be a short read due to an object boundary */ 5008 osd_req_op_extent_osd_data_pages(req, 0, 5009 pages, *plen, page_align, false, false); 5010 5011 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 5012 off, *plen, *plen, page_align); 5013 5014 rc = ceph_osdc_start_request(osdc, req, false); 5015 if (!rc) 5016 rc = ceph_osdc_wait_request(osdc, req); 5017 5018 ceph_osdc_put_request(req); 5019 dout("readpages result %d\n", rc); 5020 return rc; 5021 } 5022 EXPORT_SYMBOL(ceph_osdc_readpages); 5023 5024 /* 5025 * do a synchronous write on N pages 5026 */ 5027 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 5028 struct ceph_file_layout *layout, 5029 struct ceph_snap_context *snapc, 5030 u64 off, u64 len, 5031 u32 truncate_seq, u64 truncate_size, 5032 struct timespec *mtime, 5033 struct page **pages, int num_pages) 5034 { 5035 struct ceph_osd_request *req; 5036 int rc = 0; 5037 int page_align = off & ~PAGE_MASK; 5038 5039 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 5040 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, 5041 snapc, truncate_seq, truncate_size, 5042 true); 5043 if (IS_ERR(req)) 5044 return PTR_ERR(req); 5045 5046 /* it may be a short write due to an object boundary */ 5047 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 5048 false, false); 5049 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 5050 5051 req->r_mtime = *mtime; 5052 rc = ceph_osdc_start_request(osdc, req, true); 5053 if (!rc) 5054 rc = ceph_osdc_wait_request(osdc, req); 5055 5056 ceph_osdc_put_request(req); 5057 if (rc == 0) 5058 rc = len; 5059 dout("writepages result %d\n", rc); 5060 return rc; 5061 } 5062 EXPORT_SYMBOL(ceph_osdc_writepages); 5063 5064 int ceph_osdc_setup(void) 5065 { 5066 size_t size = sizeof(struct ceph_osd_request) + 5067 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 5068 5069 BUG_ON(ceph_osd_request_cache); 5070 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 5071 0, 0, NULL); 5072 5073 return ceph_osd_request_cache ? 0 : -ENOMEM; 5074 } 5075 EXPORT_SYMBOL(ceph_osdc_setup); 5076 5077 void ceph_osdc_cleanup(void) 5078 { 5079 BUG_ON(!ceph_osd_request_cache); 5080 kmem_cache_destroy(ceph_osd_request_cache); 5081 ceph_osd_request_cache = NULL; 5082 } 5083 EXPORT_SYMBOL(ceph_osdc_cleanup); 5084 5085 /* 5086 * handle incoming message 5087 */ 5088 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 5089 { 5090 struct ceph_osd *osd = con->private; 5091 struct ceph_osd_client *osdc = osd->o_osdc; 5092 int type = le16_to_cpu(msg->hdr.type); 5093 5094 switch (type) { 5095 case CEPH_MSG_OSD_MAP: 5096 ceph_osdc_handle_map(osdc, msg); 5097 break; 5098 case CEPH_MSG_OSD_OPREPLY: 5099 handle_reply(osd, msg); 5100 break; 5101 case CEPH_MSG_OSD_BACKOFF: 5102 handle_backoff(osd, msg); 5103 break; 5104 case CEPH_MSG_WATCH_NOTIFY: 5105 handle_watch_notify(osdc, msg); 5106 break; 5107 5108 default: 5109 pr_err("received unknown message type %d %s\n", type, 5110 ceph_msg_type_name(type)); 5111 } 5112 5113 ceph_msg_put(msg); 5114 } 5115 5116 /* 5117 * Lookup and return message for incoming reply. Don't try to do 5118 * anything about a larger than preallocated data portion of the 5119 * message at the moment - for now, just skip the message. 5120 */ 5121 static struct ceph_msg *get_reply(struct ceph_connection *con, 5122 struct ceph_msg_header *hdr, 5123 int *skip) 5124 { 5125 struct ceph_osd *osd = con->private; 5126 struct ceph_osd_client *osdc = osd->o_osdc; 5127 struct ceph_msg *m = NULL; 5128 struct ceph_osd_request *req; 5129 int front_len = le32_to_cpu(hdr->front_len); 5130 int data_len = le32_to_cpu(hdr->data_len); 5131 u64 tid = le64_to_cpu(hdr->tid); 5132 5133 down_read(&osdc->lock); 5134 if (!osd_registered(osd)) { 5135 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 5136 *skip = 1; 5137 goto out_unlock_osdc; 5138 } 5139 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 5140 5141 mutex_lock(&osd->lock); 5142 req = lookup_request(&osd->o_requests, tid); 5143 if (!req) { 5144 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 5145 osd->o_osd, tid); 5146 *skip = 1; 5147 goto out_unlock_session; 5148 } 5149 5150 ceph_msg_revoke_incoming(req->r_reply); 5151 5152 if (front_len > req->r_reply->front_alloc_len) { 5153 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 5154 __func__, osd->o_osd, req->r_tid, front_len, 5155 req->r_reply->front_alloc_len); 5156 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 5157 false); 5158 if (!m) 5159 goto out_unlock_session; 5160 ceph_msg_put(req->r_reply); 5161 req->r_reply = m; 5162 } 5163 5164 if (data_len > req->r_reply->data_length) { 5165 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 5166 __func__, osd->o_osd, req->r_tid, data_len, 5167 req->r_reply->data_length); 5168 m = NULL; 5169 *skip = 1; 5170 goto out_unlock_session; 5171 } 5172 5173 m = ceph_msg_get(req->r_reply); 5174 dout("get_reply tid %lld %p\n", tid, m); 5175 5176 out_unlock_session: 5177 mutex_unlock(&osd->lock); 5178 out_unlock_osdc: 5179 up_read(&osdc->lock); 5180 return m; 5181 } 5182 5183 /* 5184 * TODO: switch to a msg-owned pagelist 5185 */ 5186 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 5187 { 5188 struct ceph_msg *m; 5189 int type = le16_to_cpu(hdr->type); 5190 u32 front_len = le32_to_cpu(hdr->front_len); 5191 u32 data_len = le32_to_cpu(hdr->data_len); 5192 5193 m = ceph_msg_new(type, front_len, GFP_NOIO, false); 5194 if (!m) 5195 return NULL; 5196 5197 if (data_len) { 5198 struct page **pages; 5199 struct ceph_osd_data osd_data; 5200 5201 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 5202 GFP_NOIO); 5203 if (IS_ERR(pages)) { 5204 ceph_msg_put(m); 5205 return NULL; 5206 } 5207 5208 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false, 5209 false); 5210 ceph_osdc_msg_data_add(m, &osd_data); 5211 } 5212 5213 return m; 5214 } 5215 5216 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 5217 struct ceph_msg_header *hdr, 5218 int *skip) 5219 { 5220 struct ceph_osd *osd = con->private; 5221 int type = le16_to_cpu(hdr->type); 5222 5223 *skip = 0; 5224 switch (type) { 5225 case CEPH_MSG_OSD_MAP: 5226 case CEPH_MSG_OSD_BACKOFF: 5227 case CEPH_MSG_WATCH_NOTIFY: 5228 return alloc_msg_with_page_vector(hdr); 5229 case CEPH_MSG_OSD_OPREPLY: 5230 return get_reply(con, hdr, skip); 5231 default: 5232 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 5233 osd->o_osd, type); 5234 *skip = 1; 5235 return NULL; 5236 } 5237 } 5238 5239 /* 5240 * Wrappers to refcount containing ceph_osd struct 5241 */ 5242 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 5243 { 5244 struct ceph_osd *osd = con->private; 5245 if (get_osd(osd)) 5246 return con; 5247 return NULL; 5248 } 5249 5250 static void put_osd_con(struct ceph_connection *con) 5251 { 5252 struct ceph_osd *osd = con->private; 5253 put_osd(osd); 5254 } 5255 5256 /* 5257 * authentication 5258 */ 5259 /* 5260 * Note: returned pointer is the address of a structure that's 5261 * managed separately. Caller must *not* attempt to free it. 5262 */ 5263 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 5264 int *proto, int force_new) 5265 { 5266 struct ceph_osd *o = con->private; 5267 struct ceph_osd_client *osdc = o->o_osdc; 5268 struct ceph_auth_client *ac = osdc->client->monc.auth; 5269 struct ceph_auth_handshake *auth = &o->o_auth; 5270 5271 if (force_new && auth->authorizer) { 5272 ceph_auth_destroy_authorizer(auth->authorizer); 5273 auth->authorizer = NULL; 5274 } 5275 if (!auth->authorizer) { 5276 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5277 auth); 5278 if (ret) 5279 return ERR_PTR(ret); 5280 } else { 5281 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5282 auth); 5283 if (ret) 5284 return ERR_PTR(ret); 5285 } 5286 *proto = ac->protocol; 5287 5288 return auth; 5289 } 5290 5291 5292 static int verify_authorizer_reply(struct ceph_connection *con) 5293 { 5294 struct ceph_osd *o = con->private; 5295 struct ceph_osd_client *osdc = o->o_osdc; 5296 struct ceph_auth_client *ac = osdc->client->monc.auth; 5297 5298 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer); 5299 } 5300 5301 static int invalidate_authorizer(struct ceph_connection *con) 5302 { 5303 struct ceph_osd *o = con->private; 5304 struct ceph_osd_client *osdc = o->o_osdc; 5305 struct ceph_auth_client *ac = osdc->client->monc.auth; 5306 5307 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 5308 return ceph_monc_validate_auth(&osdc->client->monc); 5309 } 5310 5311 static void osd_reencode_message(struct ceph_msg *msg) 5312 { 5313 int type = le16_to_cpu(msg->hdr.type); 5314 5315 if (type == CEPH_MSG_OSD_OP) 5316 encode_request_finish(msg); 5317 } 5318 5319 static int osd_sign_message(struct ceph_msg *msg) 5320 { 5321 struct ceph_osd *o = msg->con->private; 5322 struct ceph_auth_handshake *auth = &o->o_auth; 5323 5324 return ceph_auth_sign_message(auth, msg); 5325 } 5326 5327 static int osd_check_message_signature(struct ceph_msg *msg) 5328 { 5329 struct ceph_osd *o = msg->con->private; 5330 struct ceph_auth_handshake *auth = &o->o_auth; 5331 5332 return ceph_auth_check_message_signature(auth, msg); 5333 } 5334 5335 static const struct ceph_connection_operations osd_con_ops = { 5336 .get = get_osd_con, 5337 .put = put_osd_con, 5338 .dispatch = dispatch, 5339 .get_authorizer = get_authorizer, 5340 .verify_authorizer_reply = verify_authorizer_reply, 5341 .invalidate_authorizer = invalidate_authorizer, 5342 .alloc_msg = alloc_msg, 5343 .reencode_message = osd_reencode_message, 5344 .sign_message = osd_sign_message, 5345 .check_message_signature = osd_check_message_signature, 5346 .fault = osd_fault, 5347 }; 5348