1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/ceph/ceph_debug.h> 4 5 #include <linux/module.h> 6 #include <linux/err.h> 7 #include <linux/highmem.h> 8 #include <linux/mm.h> 9 #include <linux/pagemap.h> 10 #include <linux/slab.h> 11 #include <linux/uaccess.h> 12 #ifdef CONFIG_BLOCK 13 #include <linux/bio.h> 14 #endif 15 16 #include <linux/ceph/ceph_features.h> 17 #include <linux/ceph/libceph.h> 18 #include <linux/ceph/osd_client.h> 19 #include <linux/ceph/messenger.h> 20 #include <linux/ceph/decode.h> 21 #include <linux/ceph/auth.h> 22 #include <linux/ceph/pagelist.h> 23 #include <linux/ceph/striper.h> 24 25 #define OSD_OPREPLY_FRONT_LEN 512 26 27 static struct kmem_cache *ceph_osd_request_cache; 28 29 static const struct ceph_connection_operations osd_con_ops; 30 31 /* 32 * Implement client access to distributed object storage cluster. 33 * 34 * All data objects are stored within a cluster/cloud of OSDs, or 35 * "object storage devices." (Note that Ceph OSDs have _nothing_ to 36 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply 37 * remote daemons serving up and coordinating consistent and safe 38 * access to storage. 39 * 40 * Cluster membership and the mapping of data objects onto storage devices 41 * are described by the osd map. 42 * 43 * We keep track of pending OSD requests (read, write), resubmit 44 * requests to different OSDs when the cluster topology/data layout 45 * change, or retry the affected requests when the communications 46 * channel with an OSD is reset. 47 */ 48 49 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req); 50 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req); 51 static void link_linger(struct ceph_osd *osd, 52 struct ceph_osd_linger_request *lreq); 53 static void unlink_linger(struct ceph_osd *osd, 54 struct ceph_osd_linger_request *lreq); 55 static void clear_backoffs(struct ceph_osd *osd); 56 57 #if 1 58 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem) 59 { 60 bool wrlocked = true; 61 62 if (unlikely(down_read_trylock(sem))) { 63 wrlocked = false; 64 up_read(sem); 65 } 66 67 return wrlocked; 68 } 69 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) 70 { 71 WARN_ON(!rwsem_is_locked(&osdc->lock)); 72 } 73 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) 74 { 75 WARN_ON(!rwsem_is_wrlocked(&osdc->lock)); 76 } 77 static inline void verify_osd_locked(struct ceph_osd *osd) 78 { 79 struct ceph_osd_client *osdc = osd->o_osdc; 80 81 WARN_ON(!(mutex_is_locked(&osd->lock) && 82 rwsem_is_locked(&osdc->lock)) && 83 !rwsem_is_wrlocked(&osdc->lock)); 84 } 85 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) 86 { 87 WARN_ON(!mutex_is_locked(&lreq->lock)); 88 } 89 #else 90 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { } 91 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { } 92 static inline void verify_osd_locked(struct ceph_osd *osd) { } 93 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { } 94 #endif 95 96 /* 97 * calculate the mapping of a file extent onto an object, and fill out the 98 * request accordingly. shorten extent as necessary if it crosses an 99 * object boundary. 100 * 101 * fill osd op in request message. 102 */ 103 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, 104 u64 *objnum, u64 *objoff, u64 *objlen) 105 { 106 u64 orig_len = *plen; 107 u32 xlen; 108 109 /* object extent? */ 110 ceph_calc_file_object_mapping(layout, off, orig_len, objnum, 111 objoff, &xlen); 112 *objlen = xlen; 113 if (*objlen < orig_len) { 114 *plen = *objlen; 115 dout(" skipping last %llu, final file extent %llu~%llu\n", 116 orig_len - *plen, off, *plen); 117 } 118 119 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); 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 ceph_bio_iter *bio_pos, 151 u32 bio_length) 152 { 153 osd_data->type = CEPH_OSD_DATA_TYPE_BIO; 154 osd_data->bio_pos = *bio_pos; 155 osd_data->bio_length = bio_length; 156 } 157 #endif /* CONFIG_BLOCK */ 158 159 static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data, 160 struct ceph_bvec_iter *bvec_pos, 161 u32 num_bvecs) 162 { 163 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS; 164 osd_data->bvec_pos = *bvec_pos; 165 osd_data->num_bvecs = num_bvecs; 166 } 167 168 #define osd_req_op_data(oreq, whch, typ, fld) \ 169 ({ \ 170 struct ceph_osd_request *__oreq = (oreq); \ 171 unsigned int __whch = (whch); \ 172 BUG_ON(__whch >= __oreq->r_num_ops); \ 173 &__oreq->r_ops[__whch].typ.fld; \ 174 }) 175 176 static struct ceph_osd_data * 177 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) 178 { 179 BUG_ON(which >= osd_req->r_num_ops); 180 181 return &osd_req->r_ops[which].raw_data_in; 182 } 183 184 struct ceph_osd_data * 185 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, 186 unsigned int which) 187 { 188 return osd_req_op_data(osd_req, which, extent, osd_data); 189 } 190 EXPORT_SYMBOL(osd_req_op_extent_osd_data); 191 192 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, 193 unsigned int which, struct page **pages, 194 u64 length, u32 alignment, 195 bool pages_from_pool, bool own_pages) 196 { 197 struct ceph_osd_data *osd_data; 198 199 osd_data = osd_req_op_raw_data_in(osd_req, which); 200 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 201 pages_from_pool, own_pages); 202 } 203 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); 204 205 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, 206 unsigned int which, struct page **pages, 207 u64 length, u32 alignment, 208 bool pages_from_pool, bool own_pages) 209 { 210 struct ceph_osd_data *osd_data; 211 212 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 213 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 214 pages_from_pool, own_pages); 215 } 216 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); 217 218 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, 219 unsigned int which, struct ceph_pagelist *pagelist) 220 { 221 struct ceph_osd_data *osd_data; 222 223 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 224 ceph_osd_data_pagelist_init(osd_data, pagelist); 225 } 226 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); 227 228 #ifdef CONFIG_BLOCK 229 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 230 unsigned int which, 231 struct ceph_bio_iter *bio_pos, 232 u32 bio_length) 233 { 234 struct ceph_osd_data *osd_data; 235 236 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 237 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length); 238 } 239 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); 240 #endif /* CONFIG_BLOCK */ 241 242 void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req, 243 unsigned int which, 244 struct bio_vec *bvecs, u32 num_bvecs, 245 u32 bytes) 246 { 247 struct ceph_osd_data *osd_data; 248 struct ceph_bvec_iter it = { 249 .bvecs = bvecs, 250 .iter = { .bi_size = bytes }, 251 }; 252 253 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 254 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs); 255 } 256 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs); 257 258 void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req, 259 unsigned int which, 260 struct ceph_bvec_iter *bvec_pos) 261 { 262 struct ceph_osd_data *osd_data; 263 264 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 265 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0); 266 } 267 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos); 268 269 static void osd_req_op_cls_request_info_pagelist( 270 struct ceph_osd_request *osd_req, 271 unsigned int which, struct ceph_pagelist *pagelist) 272 { 273 struct ceph_osd_data *osd_data; 274 275 osd_data = osd_req_op_data(osd_req, which, cls, request_info); 276 ceph_osd_data_pagelist_init(osd_data, pagelist); 277 } 278 279 void osd_req_op_cls_request_data_pagelist( 280 struct ceph_osd_request *osd_req, 281 unsigned int which, struct ceph_pagelist *pagelist) 282 { 283 struct ceph_osd_data *osd_data; 284 285 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 286 ceph_osd_data_pagelist_init(osd_data, pagelist); 287 osd_req->r_ops[which].cls.indata_len += pagelist->length; 288 osd_req->r_ops[which].indata_len += pagelist->length; 289 } 290 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); 291 292 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, 293 unsigned int which, struct page **pages, u64 length, 294 u32 alignment, bool pages_from_pool, bool own_pages) 295 { 296 struct ceph_osd_data *osd_data; 297 298 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 299 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 300 pages_from_pool, own_pages); 301 osd_req->r_ops[which].cls.indata_len += length; 302 osd_req->r_ops[which].indata_len += length; 303 } 304 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); 305 306 void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req, 307 unsigned int which, 308 struct bio_vec *bvecs, u32 num_bvecs, 309 u32 bytes) 310 { 311 struct ceph_osd_data *osd_data; 312 struct ceph_bvec_iter it = { 313 .bvecs = bvecs, 314 .iter = { .bi_size = bytes }, 315 }; 316 317 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 318 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs); 319 osd_req->r_ops[which].cls.indata_len += bytes; 320 osd_req->r_ops[which].indata_len += bytes; 321 } 322 EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs); 323 324 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, 325 unsigned int which, struct page **pages, u64 length, 326 u32 alignment, bool pages_from_pool, bool own_pages) 327 { 328 struct ceph_osd_data *osd_data; 329 330 osd_data = osd_req_op_data(osd_req, which, cls, response_data); 331 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 332 pages_from_pool, own_pages); 333 } 334 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); 335 336 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) 337 { 338 switch (osd_data->type) { 339 case CEPH_OSD_DATA_TYPE_NONE: 340 return 0; 341 case CEPH_OSD_DATA_TYPE_PAGES: 342 return osd_data->length; 343 case CEPH_OSD_DATA_TYPE_PAGELIST: 344 return (u64)osd_data->pagelist->length; 345 #ifdef CONFIG_BLOCK 346 case CEPH_OSD_DATA_TYPE_BIO: 347 return (u64)osd_data->bio_length; 348 #endif /* CONFIG_BLOCK */ 349 case CEPH_OSD_DATA_TYPE_BVECS: 350 return osd_data->bvec_pos.iter.bi_size; 351 default: 352 WARN(true, "unrecognized data type %d\n", (int)osd_data->type); 353 return 0; 354 } 355 } 356 357 static void ceph_osd_data_release(struct ceph_osd_data *osd_data) 358 { 359 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { 360 int num_pages; 361 362 num_pages = calc_pages_for((u64)osd_data->alignment, 363 (u64)osd_data->length); 364 ceph_release_page_vector(osd_data->pages, num_pages); 365 } 366 ceph_osd_data_init(osd_data); 367 } 368 369 static void osd_req_op_data_release(struct ceph_osd_request *osd_req, 370 unsigned int which) 371 { 372 struct ceph_osd_req_op *op; 373 374 BUG_ON(which >= osd_req->r_num_ops); 375 op = &osd_req->r_ops[which]; 376 377 switch (op->op) { 378 case CEPH_OSD_OP_READ: 379 case CEPH_OSD_OP_WRITE: 380 case CEPH_OSD_OP_WRITEFULL: 381 ceph_osd_data_release(&op->extent.osd_data); 382 break; 383 case CEPH_OSD_OP_CALL: 384 ceph_osd_data_release(&op->cls.request_info); 385 ceph_osd_data_release(&op->cls.request_data); 386 ceph_osd_data_release(&op->cls.response_data); 387 break; 388 case CEPH_OSD_OP_SETXATTR: 389 case CEPH_OSD_OP_CMPXATTR: 390 ceph_osd_data_release(&op->xattr.osd_data); 391 break; 392 case CEPH_OSD_OP_STAT: 393 ceph_osd_data_release(&op->raw_data_in); 394 break; 395 case CEPH_OSD_OP_NOTIFY_ACK: 396 ceph_osd_data_release(&op->notify_ack.request_data); 397 break; 398 case CEPH_OSD_OP_NOTIFY: 399 ceph_osd_data_release(&op->notify.request_data); 400 ceph_osd_data_release(&op->notify.response_data); 401 break; 402 case CEPH_OSD_OP_LIST_WATCHERS: 403 ceph_osd_data_release(&op->list_watchers.response_data); 404 break; 405 default: 406 break; 407 } 408 } 409 410 /* 411 * Assumes @t is zero-initialized. 412 */ 413 static void target_init(struct ceph_osd_request_target *t) 414 { 415 ceph_oid_init(&t->base_oid); 416 ceph_oloc_init(&t->base_oloc); 417 ceph_oid_init(&t->target_oid); 418 ceph_oloc_init(&t->target_oloc); 419 420 ceph_osds_init(&t->acting); 421 ceph_osds_init(&t->up); 422 t->size = -1; 423 t->min_size = -1; 424 425 t->osd = CEPH_HOMELESS_OSD; 426 } 427 428 static void target_copy(struct ceph_osd_request_target *dest, 429 const struct ceph_osd_request_target *src) 430 { 431 ceph_oid_copy(&dest->base_oid, &src->base_oid); 432 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc); 433 ceph_oid_copy(&dest->target_oid, &src->target_oid); 434 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc); 435 436 dest->pgid = src->pgid; /* struct */ 437 dest->spgid = src->spgid; /* struct */ 438 dest->pg_num = src->pg_num; 439 dest->pg_num_mask = src->pg_num_mask; 440 ceph_osds_copy(&dest->acting, &src->acting); 441 ceph_osds_copy(&dest->up, &src->up); 442 dest->size = src->size; 443 dest->min_size = src->min_size; 444 dest->sort_bitwise = src->sort_bitwise; 445 446 dest->flags = src->flags; 447 dest->paused = src->paused; 448 449 dest->epoch = src->epoch; 450 dest->last_force_resend = src->last_force_resend; 451 452 dest->osd = src->osd; 453 } 454 455 static void target_destroy(struct ceph_osd_request_target *t) 456 { 457 ceph_oid_destroy(&t->base_oid); 458 ceph_oloc_destroy(&t->base_oloc); 459 ceph_oid_destroy(&t->target_oid); 460 ceph_oloc_destroy(&t->target_oloc); 461 } 462 463 /* 464 * requests 465 */ 466 static void request_release_checks(struct ceph_osd_request *req) 467 { 468 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 469 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node)); 470 WARN_ON(!list_empty(&req->r_unsafe_item)); 471 WARN_ON(req->r_osd); 472 } 473 474 static void ceph_osdc_release_request(struct kref *kref) 475 { 476 struct ceph_osd_request *req = container_of(kref, 477 struct ceph_osd_request, r_kref); 478 unsigned int which; 479 480 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 481 req->r_request, req->r_reply); 482 request_release_checks(req); 483 484 if (req->r_request) 485 ceph_msg_put(req->r_request); 486 if (req->r_reply) 487 ceph_msg_put(req->r_reply); 488 489 for (which = 0; which < req->r_num_ops; which++) 490 osd_req_op_data_release(req, which); 491 492 target_destroy(&req->r_t); 493 ceph_put_snap_context(req->r_snapc); 494 495 if (req->r_mempool) 496 mempool_free(req, req->r_osdc->req_mempool); 497 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) 498 kmem_cache_free(ceph_osd_request_cache, req); 499 else 500 kfree(req); 501 } 502 503 void ceph_osdc_get_request(struct ceph_osd_request *req) 504 { 505 dout("%s %p (was %d)\n", __func__, req, 506 kref_read(&req->r_kref)); 507 kref_get(&req->r_kref); 508 } 509 EXPORT_SYMBOL(ceph_osdc_get_request); 510 511 void ceph_osdc_put_request(struct ceph_osd_request *req) 512 { 513 if (req) { 514 dout("%s %p (was %d)\n", __func__, req, 515 kref_read(&req->r_kref)); 516 kref_put(&req->r_kref, ceph_osdc_release_request); 517 } 518 } 519 EXPORT_SYMBOL(ceph_osdc_put_request); 520 521 static void request_init(struct ceph_osd_request *req) 522 { 523 /* req only, each op is zeroed in _osd_req_op_init() */ 524 memset(req, 0, sizeof(*req)); 525 526 kref_init(&req->r_kref); 527 init_completion(&req->r_completion); 528 RB_CLEAR_NODE(&req->r_node); 529 RB_CLEAR_NODE(&req->r_mc_node); 530 INIT_LIST_HEAD(&req->r_unsafe_item); 531 532 target_init(&req->r_t); 533 } 534 535 /* 536 * This is ugly, but it allows us to reuse linger registration and ping 537 * requests, keeping the structure of the code around send_linger{_ping}() 538 * reasonable. Setting up a min_nr=2 mempool for each linger request 539 * and dealing with copying ops (this blasts req only, watch op remains 540 * intact) isn't any better. 541 */ 542 static void request_reinit(struct ceph_osd_request *req) 543 { 544 struct ceph_osd_client *osdc = req->r_osdc; 545 bool mempool = req->r_mempool; 546 unsigned int num_ops = req->r_num_ops; 547 u64 snapid = req->r_snapid; 548 struct ceph_snap_context *snapc = req->r_snapc; 549 bool linger = req->r_linger; 550 struct ceph_msg *request_msg = req->r_request; 551 struct ceph_msg *reply_msg = req->r_reply; 552 553 dout("%s req %p\n", __func__, req); 554 WARN_ON(kref_read(&req->r_kref) != 1); 555 request_release_checks(req); 556 557 WARN_ON(kref_read(&request_msg->kref) != 1); 558 WARN_ON(kref_read(&reply_msg->kref) != 1); 559 target_destroy(&req->r_t); 560 561 request_init(req); 562 req->r_osdc = osdc; 563 req->r_mempool = mempool; 564 req->r_num_ops = num_ops; 565 req->r_snapid = snapid; 566 req->r_snapc = snapc; 567 req->r_linger = linger; 568 req->r_request = request_msg; 569 req->r_reply = reply_msg; 570 } 571 572 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 573 struct ceph_snap_context *snapc, 574 unsigned int num_ops, 575 bool use_mempool, 576 gfp_t gfp_flags) 577 { 578 struct ceph_osd_request *req; 579 580 if (use_mempool) { 581 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 582 req = mempool_alloc(osdc->req_mempool, gfp_flags); 583 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 584 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 585 } else { 586 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 587 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags); 588 } 589 if (unlikely(!req)) 590 return NULL; 591 592 request_init(req); 593 req->r_osdc = osdc; 594 req->r_mempool = use_mempool; 595 req->r_num_ops = num_ops; 596 req->r_snapid = CEPH_NOSNAP; 597 req->r_snapc = ceph_get_snap_context(snapc); 598 599 dout("%s req %p\n", __func__, req); 600 return req; 601 } 602 EXPORT_SYMBOL(ceph_osdc_alloc_request); 603 604 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc) 605 { 606 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); 607 } 608 609 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 610 { 611 struct ceph_osd_client *osdc = req->r_osdc; 612 struct ceph_msg *msg; 613 int msg_size; 614 615 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 616 WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); 617 618 /* create request message */ 619 msg_size = CEPH_ENCODING_START_BLK_LEN + 620 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 621 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */ 622 msg_size += CEPH_ENCODING_START_BLK_LEN + 623 sizeof(struct ceph_osd_reqid); /* reqid */ 624 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */ 625 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */ 626 msg_size += CEPH_ENCODING_START_BLK_LEN + 627 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 628 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 629 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 630 msg_size += 8; /* snapid */ 631 msg_size += 8; /* snap_seq */ 632 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 633 msg_size += 4 + 8; /* retry_attempt, features */ 634 635 if (req->r_mempool) 636 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 637 else 638 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true); 639 if (!msg) 640 return -ENOMEM; 641 642 memset(msg->front.iov_base, 0, msg->front.iov_len); 643 req->r_request = msg; 644 645 /* create reply message */ 646 msg_size = OSD_OPREPLY_FRONT_LEN; 647 msg_size += req->r_base_oid.name_len; 648 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 649 650 if (req->r_mempool) 651 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 652 else 653 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true); 654 if (!msg) 655 return -ENOMEM; 656 657 req->r_reply = msg; 658 659 return 0; 660 } 661 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 662 663 static bool osd_req_opcode_valid(u16 opcode) 664 { 665 switch (opcode) { 666 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 667 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 668 #undef GENERATE_CASE 669 default: 670 return false; 671 } 672 } 673 674 /* 675 * This is an osd op init function for opcodes that have no data or 676 * other information associated with them. It also serves as a 677 * common init routine for all the other init functions, below. 678 */ 679 static struct ceph_osd_req_op * 680 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 681 u16 opcode, u32 flags) 682 { 683 struct ceph_osd_req_op *op; 684 685 BUG_ON(which >= osd_req->r_num_ops); 686 BUG_ON(!osd_req_opcode_valid(opcode)); 687 688 op = &osd_req->r_ops[which]; 689 memset(op, 0, sizeof (*op)); 690 op->op = opcode; 691 op->flags = flags; 692 693 return op; 694 } 695 696 void osd_req_op_init(struct ceph_osd_request *osd_req, 697 unsigned int which, u16 opcode, u32 flags) 698 { 699 (void)_osd_req_op_init(osd_req, which, opcode, flags); 700 } 701 EXPORT_SYMBOL(osd_req_op_init); 702 703 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 704 unsigned int which, u16 opcode, 705 u64 offset, u64 length, 706 u64 truncate_size, u32 truncate_seq) 707 { 708 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 709 opcode, 0); 710 size_t payload_len = 0; 711 712 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 713 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 714 opcode != CEPH_OSD_OP_TRUNCATE); 715 716 op->extent.offset = offset; 717 op->extent.length = length; 718 op->extent.truncate_size = truncate_size; 719 op->extent.truncate_seq = truncate_seq; 720 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 721 payload_len += length; 722 723 op->indata_len = payload_len; 724 } 725 EXPORT_SYMBOL(osd_req_op_extent_init); 726 727 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 728 unsigned int which, u64 length) 729 { 730 struct ceph_osd_req_op *op; 731 u64 previous; 732 733 BUG_ON(which >= osd_req->r_num_ops); 734 op = &osd_req->r_ops[which]; 735 previous = op->extent.length; 736 737 if (length == previous) 738 return; /* Nothing to do */ 739 BUG_ON(length > previous); 740 741 op->extent.length = length; 742 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 743 op->indata_len -= previous - length; 744 } 745 EXPORT_SYMBOL(osd_req_op_extent_update); 746 747 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 748 unsigned int which, u64 offset_inc) 749 { 750 struct ceph_osd_req_op *op, *prev_op; 751 752 BUG_ON(which + 1 >= osd_req->r_num_ops); 753 754 prev_op = &osd_req->r_ops[which]; 755 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 756 /* dup previous one */ 757 op->indata_len = prev_op->indata_len; 758 op->outdata_len = prev_op->outdata_len; 759 op->extent = prev_op->extent; 760 /* adjust offset */ 761 op->extent.offset += offset_inc; 762 op->extent.length -= offset_inc; 763 764 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 765 op->indata_len -= offset_inc; 766 } 767 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 768 769 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 770 u16 opcode, const char *class, const char *method) 771 { 772 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 773 opcode, 0); 774 struct ceph_pagelist *pagelist; 775 size_t payload_len = 0; 776 size_t size; 777 778 BUG_ON(opcode != CEPH_OSD_OP_CALL); 779 780 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 781 if (!pagelist) 782 return -ENOMEM; 783 784 ceph_pagelist_init(pagelist); 785 786 op->cls.class_name = class; 787 size = strlen(class); 788 BUG_ON(size > (size_t) U8_MAX); 789 op->cls.class_len = size; 790 ceph_pagelist_append(pagelist, class, size); 791 payload_len += size; 792 793 op->cls.method_name = method; 794 size = strlen(method); 795 BUG_ON(size > (size_t) U8_MAX); 796 op->cls.method_len = size; 797 ceph_pagelist_append(pagelist, method, size); 798 payload_len += size; 799 800 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 801 802 op->indata_len = payload_len; 803 return 0; 804 } 805 EXPORT_SYMBOL(osd_req_op_cls_init); 806 807 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 808 u16 opcode, const char *name, const void *value, 809 size_t size, u8 cmp_op, u8 cmp_mode) 810 { 811 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 812 opcode, 0); 813 struct ceph_pagelist *pagelist; 814 size_t payload_len; 815 816 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 817 818 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 819 if (!pagelist) 820 return -ENOMEM; 821 822 ceph_pagelist_init(pagelist); 823 824 payload_len = strlen(name); 825 op->xattr.name_len = payload_len; 826 ceph_pagelist_append(pagelist, name, payload_len); 827 828 op->xattr.value_len = size; 829 ceph_pagelist_append(pagelist, value, size); 830 payload_len += size; 831 832 op->xattr.cmp_op = cmp_op; 833 op->xattr.cmp_mode = cmp_mode; 834 835 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 836 op->indata_len = payload_len; 837 return 0; 838 } 839 EXPORT_SYMBOL(osd_req_op_xattr_init); 840 841 /* 842 * @watch_opcode: CEPH_OSD_WATCH_OP_* 843 */ 844 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 845 u64 cookie, u8 watch_opcode) 846 { 847 struct ceph_osd_req_op *op; 848 849 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 850 op->watch.cookie = cookie; 851 op->watch.op = watch_opcode; 852 op->watch.gen = 0; 853 } 854 855 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 856 unsigned int which, 857 u64 expected_object_size, 858 u64 expected_write_size) 859 { 860 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 861 CEPH_OSD_OP_SETALLOCHINT, 862 0); 863 864 op->alloc_hint.expected_object_size = expected_object_size; 865 op->alloc_hint.expected_write_size = expected_write_size; 866 867 /* 868 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 869 * not worth a feature bit. Set FAILOK per-op flag to make 870 * sure older osds don't trip over an unsupported opcode. 871 */ 872 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 873 } 874 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 875 876 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 877 struct ceph_osd_data *osd_data) 878 { 879 u64 length = ceph_osd_data_length(osd_data); 880 881 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 882 BUG_ON(length > (u64) SIZE_MAX); 883 if (length) 884 ceph_msg_data_add_pages(msg, osd_data->pages, 885 length, osd_data->alignment); 886 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 887 BUG_ON(!length); 888 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 889 #ifdef CONFIG_BLOCK 890 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 891 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length); 892 #endif 893 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) { 894 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos); 895 } else { 896 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 897 } 898 } 899 900 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 901 const struct ceph_osd_req_op *src) 902 { 903 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 904 pr_err("unrecognized osd opcode %d\n", src->op); 905 906 return 0; 907 } 908 909 switch (src->op) { 910 case CEPH_OSD_OP_STAT: 911 break; 912 case CEPH_OSD_OP_READ: 913 case CEPH_OSD_OP_WRITE: 914 case CEPH_OSD_OP_WRITEFULL: 915 case CEPH_OSD_OP_ZERO: 916 case CEPH_OSD_OP_TRUNCATE: 917 dst->extent.offset = cpu_to_le64(src->extent.offset); 918 dst->extent.length = cpu_to_le64(src->extent.length); 919 dst->extent.truncate_size = 920 cpu_to_le64(src->extent.truncate_size); 921 dst->extent.truncate_seq = 922 cpu_to_le32(src->extent.truncate_seq); 923 break; 924 case CEPH_OSD_OP_CALL: 925 dst->cls.class_len = src->cls.class_len; 926 dst->cls.method_len = src->cls.method_len; 927 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 928 break; 929 case CEPH_OSD_OP_WATCH: 930 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 931 dst->watch.ver = cpu_to_le64(0); 932 dst->watch.op = src->watch.op; 933 dst->watch.gen = cpu_to_le32(src->watch.gen); 934 break; 935 case CEPH_OSD_OP_NOTIFY_ACK: 936 break; 937 case CEPH_OSD_OP_NOTIFY: 938 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 939 break; 940 case CEPH_OSD_OP_LIST_WATCHERS: 941 break; 942 case CEPH_OSD_OP_SETALLOCHINT: 943 dst->alloc_hint.expected_object_size = 944 cpu_to_le64(src->alloc_hint.expected_object_size); 945 dst->alloc_hint.expected_write_size = 946 cpu_to_le64(src->alloc_hint.expected_write_size); 947 break; 948 case CEPH_OSD_OP_SETXATTR: 949 case CEPH_OSD_OP_CMPXATTR: 950 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 951 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 952 dst->xattr.cmp_op = src->xattr.cmp_op; 953 dst->xattr.cmp_mode = src->xattr.cmp_mode; 954 break; 955 case CEPH_OSD_OP_CREATE: 956 case CEPH_OSD_OP_DELETE: 957 break; 958 default: 959 pr_err("unsupported osd opcode %s\n", 960 ceph_osd_op_name(src->op)); 961 WARN_ON(1); 962 963 return 0; 964 } 965 966 dst->op = cpu_to_le16(src->op); 967 dst->flags = cpu_to_le32(src->flags); 968 dst->payload_len = cpu_to_le32(src->indata_len); 969 970 return src->indata_len; 971 } 972 973 /* 974 * build new request AND message, calculate layout, and adjust file 975 * extent as needed. 976 * 977 * if the file was recently truncated, we include information about its 978 * old and new size so that the object can be updated appropriately. (we 979 * avoid synchronously deleting truncated objects because it's slow.) 980 */ 981 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 982 struct ceph_file_layout *layout, 983 struct ceph_vino vino, 984 u64 off, u64 *plen, 985 unsigned int which, int num_ops, 986 int opcode, int flags, 987 struct ceph_snap_context *snapc, 988 u32 truncate_seq, 989 u64 truncate_size, 990 bool use_mempool) 991 { 992 struct ceph_osd_request *req; 993 u64 objnum = 0; 994 u64 objoff = 0; 995 u64 objlen = 0; 996 int r; 997 998 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 999 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 1000 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 1001 1002 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 1003 GFP_NOFS); 1004 if (!req) { 1005 r = -ENOMEM; 1006 goto fail; 1007 } 1008 1009 /* calculate max write size */ 1010 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 1011 if (r) 1012 goto fail; 1013 1014 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 1015 osd_req_op_init(req, which, opcode, 0); 1016 } else { 1017 u32 object_size = layout->object_size; 1018 u32 object_base = off - objoff; 1019 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 1020 if (truncate_size <= object_base) { 1021 truncate_size = 0; 1022 } else { 1023 truncate_size -= object_base; 1024 if (truncate_size > object_size) 1025 truncate_size = object_size; 1026 } 1027 } 1028 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 1029 truncate_size, truncate_seq); 1030 } 1031 1032 req->r_flags = flags; 1033 req->r_base_oloc.pool = layout->pool_id; 1034 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); 1035 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 1036 1037 req->r_snapid = vino.snap; 1038 if (flags & CEPH_OSD_FLAG_WRITE) 1039 req->r_data_offset = off; 1040 1041 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 1042 if (r) 1043 goto fail; 1044 1045 return req; 1046 1047 fail: 1048 ceph_osdc_put_request(req); 1049 return ERR_PTR(r); 1050 } 1051 EXPORT_SYMBOL(ceph_osdc_new_request); 1052 1053 /* 1054 * We keep osd requests in an rbtree, sorted by ->r_tid. 1055 */ 1056 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 1057 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 1058 1059 /* 1060 * Call @fn on each OSD request as long as @fn returns 0. 1061 */ 1062 static void for_each_request(struct ceph_osd_client *osdc, 1063 int (*fn)(struct ceph_osd_request *req, void *arg), 1064 void *arg) 1065 { 1066 struct rb_node *n, *p; 1067 1068 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 1069 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 1070 1071 for (p = rb_first(&osd->o_requests); p; ) { 1072 struct ceph_osd_request *req = 1073 rb_entry(p, struct ceph_osd_request, r_node); 1074 1075 p = rb_next(p); 1076 if (fn(req, arg)) 1077 return; 1078 } 1079 } 1080 1081 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 1082 struct ceph_osd_request *req = 1083 rb_entry(p, struct ceph_osd_request, r_node); 1084 1085 p = rb_next(p); 1086 if (fn(req, arg)) 1087 return; 1088 } 1089 } 1090 1091 static bool osd_homeless(struct ceph_osd *osd) 1092 { 1093 return osd->o_osd == CEPH_HOMELESS_OSD; 1094 } 1095 1096 static bool osd_registered(struct ceph_osd *osd) 1097 { 1098 verify_osdc_locked(osd->o_osdc); 1099 1100 return !RB_EMPTY_NODE(&osd->o_node); 1101 } 1102 1103 /* 1104 * Assumes @osd is zero-initialized. 1105 */ 1106 static void osd_init(struct ceph_osd *osd) 1107 { 1108 refcount_set(&osd->o_ref, 1); 1109 RB_CLEAR_NODE(&osd->o_node); 1110 osd->o_requests = RB_ROOT; 1111 osd->o_linger_requests = RB_ROOT; 1112 osd->o_backoff_mappings = RB_ROOT; 1113 osd->o_backoffs_by_id = RB_ROOT; 1114 INIT_LIST_HEAD(&osd->o_osd_lru); 1115 INIT_LIST_HEAD(&osd->o_keepalive_item); 1116 osd->o_incarnation = 1; 1117 mutex_init(&osd->lock); 1118 } 1119 1120 static void osd_cleanup(struct ceph_osd *osd) 1121 { 1122 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1123 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1124 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1125 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings)); 1126 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id)); 1127 WARN_ON(!list_empty(&osd->o_osd_lru)); 1128 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1129 1130 if (osd->o_auth.authorizer) { 1131 WARN_ON(osd_homeless(osd)); 1132 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1133 } 1134 } 1135 1136 /* 1137 * Track open sessions with osds. 1138 */ 1139 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1140 { 1141 struct ceph_osd *osd; 1142 1143 WARN_ON(onum == CEPH_HOMELESS_OSD); 1144 1145 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1146 osd_init(osd); 1147 osd->o_osdc = osdc; 1148 osd->o_osd = onum; 1149 1150 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1151 1152 return osd; 1153 } 1154 1155 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1156 { 1157 if (refcount_inc_not_zero(&osd->o_ref)) { 1158 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1, 1159 refcount_read(&osd->o_ref)); 1160 return osd; 1161 } else { 1162 dout("get_osd %p FAIL\n", osd); 1163 return NULL; 1164 } 1165 } 1166 1167 static void put_osd(struct ceph_osd *osd) 1168 { 1169 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref), 1170 refcount_read(&osd->o_ref) - 1); 1171 if (refcount_dec_and_test(&osd->o_ref)) { 1172 osd_cleanup(osd); 1173 kfree(osd); 1174 } 1175 } 1176 1177 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1178 1179 static void __move_osd_to_lru(struct ceph_osd *osd) 1180 { 1181 struct ceph_osd_client *osdc = osd->o_osdc; 1182 1183 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1184 BUG_ON(!list_empty(&osd->o_osd_lru)); 1185 1186 spin_lock(&osdc->osd_lru_lock); 1187 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1188 spin_unlock(&osdc->osd_lru_lock); 1189 1190 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1191 } 1192 1193 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1194 { 1195 if (RB_EMPTY_ROOT(&osd->o_requests) && 1196 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1197 __move_osd_to_lru(osd); 1198 } 1199 1200 static void __remove_osd_from_lru(struct ceph_osd *osd) 1201 { 1202 struct ceph_osd_client *osdc = osd->o_osdc; 1203 1204 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1205 1206 spin_lock(&osdc->osd_lru_lock); 1207 if (!list_empty(&osd->o_osd_lru)) 1208 list_del_init(&osd->o_osd_lru); 1209 spin_unlock(&osdc->osd_lru_lock); 1210 } 1211 1212 /* 1213 * Close the connection and assign any leftover requests to the 1214 * homeless session. 1215 */ 1216 static void close_osd(struct ceph_osd *osd) 1217 { 1218 struct ceph_osd_client *osdc = osd->o_osdc; 1219 struct rb_node *n; 1220 1221 verify_osdc_wrlocked(osdc); 1222 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1223 1224 ceph_con_close(&osd->o_con); 1225 1226 for (n = rb_first(&osd->o_requests); n; ) { 1227 struct ceph_osd_request *req = 1228 rb_entry(n, struct ceph_osd_request, r_node); 1229 1230 n = rb_next(n); /* unlink_request() */ 1231 1232 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1233 unlink_request(osd, req); 1234 link_request(&osdc->homeless_osd, req); 1235 } 1236 for (n = rb_first(&osd->o_linger_requests); n; ) { 1237 struct ceph_osd_linger_request *lreq = 1238 rb_entry(n, struct ceph_osd_linger_request, node); 1239 1240 n = rb_next(n); /* unlink_linger() */ 1241 1242 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1243 lreq->linger_id); 1244 unlink_linger(osd, lreq); 1245 link_linger(&osdc->homeless_osd, lreq); 1246 } 1247 clear_backoffs(osd); 1248 1249 __remove_osd_from_lru(osd); 1250 erase_osd(&osdc->osds, osd); 1251 put_osd(osd); 1252 } 1253 1254 /* 1255 * reset osd connect 1256 */ 1257 static int reopen_osd(struct ceph_osd *osd) 1258 { 1259 struct ceph_entity_addr *peer_addr; 1260 1261 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1262 1263 if (RB_EMPTY_ROOT(&osd->o_requests) && 1264 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1265 close_osd(osd); 1266 return -ENODEV; 1267 } 1268 1269 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1270 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1271 !ceph_con_opened(&osd->o_con)) { 1272 struct rb_node *n; 1273 1274 dout("osd addr hasn't changed and connection never opened, " 1275 "letting msgr retry\n"); 1276 /* touch each r_stamp for handle_timeout()'s benfit */ 1277 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1278 struct ceph_osd_request *req = 1279 rb_entry(n, struct ceph_osd_request, r_node); 1280 req->r_stamp = jiffies; 1281 } 1282 1283 return -EAGAIN; 1284 } 1285 1286 ceph_con_close(&osd->o_con); 1287 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1288 osd->o_incarnation++; 1289 1290 return 0; 1291 } 1292 1293 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1294 bool wrlocked) 1295 { 1296 struct ceph_osd *osd; 1297 1298 if (wrlocked) 1299 verify_osdc_wrlocked(osdc); 1300 else 1301 verify_osdc_locked(osdc); 1302 1303 if (o != CEPH_HOMELESS_OSD) 1304 osd = lookup_osd(&osdc->osds, o); 1305 else 1306 osd = &osdc->homeless_osd; 1307 if (!osd) { 1308 if (!wrlocked) 1309 return ERR_PTR(-EAGAIN); 1310 1311 osd = create_osd(osdc, o); 1312 insert_osd(&osdc->osds, osd); 1313 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1314 &osdc->osdmap->osd_addr[osd->o_osd]); 1315 } 1316 1317 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1318 return osd; 1319 } 1320 1321 /* 1322 * Create request <-> OSD session relation. 1323 * 1324 * @req has to be assigned a tid, @osd may be homeless. 1325 */ 1326 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1327 { 1328 verify_osd_locked(osd); 1329 WARN_ON(!req->r_tid || req->r_osd); 1330 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1331 req, req->r_tid); 1332 1333 if (!osd_homeless(osd)) 1334 __remove_osd_from_lru(osd); 1335 else 1336 atomic_inc(&osd->o_osdc->num_homeless); 1337 1338 get_osd(osd); 1339 insert_request(&osd->o_requests, req); 1340 req->r_osd = osd; 1341 } 1342 1343 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1344 { 1345 verify_osd_locked(osd); 1346 WARN_ON(req->r_osd != osd); 1347 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1348 req, req->r_tid); 1349 1350 req->r_osd = NULL; 1351 erase_request(&osd->o_requests, req); 1352 put_osd(osd); 1353 1354 if (!osd_homeless(osd)) 1355 maybe_move_osd_to_lru(osd); 1356 else 1357 atomic_dec(&osd->o_osdc->num_homeless); 1358 } 1359 1360 static bool __pool_full(struct ceph_pg_pool_info *pi) 1361 { 1362 return pi->flags & CEPH_POOL_FLAG_FULL; 1363 } 1364 1365 static bool have_pool_full(struct ceph_osd_client *osdc) 1366 { 1367 struct rb_node *n; 1368 1369 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1370 struct ceph_pg_pool_info *pi = 1371 rb_entry(n, struct ceph_pg_pool_info, node); 1372 1373 if (__pool_full(pi)) 1374 return true; 1375 } 1376 1377 return false; 1378 } 1379 1380 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1381 { 1382 struct ceph_pg_pool_info *pi; 1383 1384 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1385 if (!pi) 1386 return false; 1387 1388 return __pool_full(pi); 1389 } 1390 1391 /* 1392 * Returns whether a request should be blocked from being sent 1393 * based on the current osdmap and osd_client settings. 1394 */ 1395 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1396 const struct ceph_osd_request_target *t, 1397 struct ceph_pg_pool_info *pi) 1398 { 1399 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1400 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1401 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1402 __pool_full(pi); 1403 1404 WARN_ON(pi->id != t->target_oloc.pool); 1405 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) || 1406 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) || 1407 (osdc->osdmap->epoch < osdc->epoch_barrier); 1408 } 1409 1410 enum calc_target_result { 1411 CALC_TARGET_NO_ACTION = 0, 1412 CALC_TARGET_NEED_RESEND, 1413 CALC_TARGET_POOL_DNE, 1414 }; 1415 1416 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1417 struct ceph_osd_request_target *t, 1418 struct ceph_connection *con, 1419 bool any_change) 1420 { 1421 struct ceph_pg_pool_info *pi; 1422 struct ceph_pg pgid, last_pgid; 1423 struct ceph_osds up, acting; 1424 bool force_resend = false; 1425 bool unpaused = false; 1426 bool legacy_change; 1427 bool split = false; 1428 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1429 bool recovery_deletes = ceph_osdmap_flag(osdc, 1430 CEPH_OSDMAP_RECOVERY_DELETES); 1431 enum calc_target_result ct_res; 1432 1433 t->epoch = osdc->osdmap->epoch; 1434 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1435 if (!pi) { 1436 t->osd = CEPH_HOMELESS_OSD; 1437 ct_res = CALC_TARGET_POOL_DNE; 1438 goto out; 1439 } 1440 1441 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1442 if (t->last_force_resend < pi->last_force_request_resend) { 1443 t->last_force_resend = pi->last_force_request_resend; 1444 force_resend = true; 1445 } else if (t->last_force_resend == 0) { 1446 force_resend = true; 1447 } 1448 } 1449 1450 /* apply tiering */ 1451 ceph_oid_copy(&t->target_oid, &t->base_oid); 1452 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1453 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1454 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) 1455 t->target_oloc.pool = pi->read_tier; 1456 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) 1457 t->target_oloc.pool = pi->write_tier; 1458 1459 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool); 1460 if (!pi) { 1461 t->osd = CEPH_HOMELESS_OSD; 1462 ct_res = CALC_TARGET_POOL_DNE; 1463 goto out; 1464 } 1465 } 1466 1467 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid); 1468 last_pgid.pool = pgid.pool; 1469 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1470 1471 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting); 1472 if (any_change && 1473 ceph_is_new_interval(&t->acting, 1474 &acting, 1475 &t->up, 1476 &up, 1477 t->size, 1478 pi->size, 1479 t->min_size, 1480 pi->min_size, 1481 t->pg_num, 1482 pi->pg_num, 1483 t->sort_bitwise, 1484 sort_bitwise, 1485 t->recovery_deletes, 1486 recovery_deletes, 1487 &last_pgid)) 1488 force_resend = true; 1489 1490 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1491 t->paused = false; 1492 unpaused = true; 1493 } 1494 legacy_change = ceph_pg_compare(&t->pgid, &pgid) || 1495 ceph_osds_changed(&t->acting, &acting, any_change); 1496 if (t->pg_num) 1497 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num); 1498 1499 if (legacy_change || force_resend || split) { 1500 t->pgid = pgid; /* struct */ 1501 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid); 1502 ceph_osds_copy(&t->acting, &acting); 1503 ceph_osds_copy(&t->up, &up); 1504 t->size = pi->size; 1505 t->min_size = pi->min_size; 1506 t->pg_num = pi->pg_num; 1507 t->pg_num_mask = pi->pg_num_mask; 1508 t->sort_bitwise = sort_bitwise; 1509 t->recovery_deletes = recovery_deletes; 1510 1511 t->osd = acting.primary; 1512 } 1513 1514 if (unpaused || legacy_change || force_resend || 1515 (split && con && CEPH_HAVE_FEATURE(con->peer_features, 1516 RESEND_ON_SPLIT))) 1517 ct_res = CALC_TARGET_NEED_RESEND; 1518 else 1519 ct_res = CALC_TARGET_NO_ACTION; 1520 1521 out: 1522 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd); 1523 return ct_res; 1524 } 1525 1526 static struct ceph_spg_mapping *alloc_spg_mapping(void) 1527 { 1528 struct ceph_spg_mapping *spg; 1529 1530 spg = kmalloc(sizeof(*spg), GFP_NOIO); 1531 if (!spg) 1532 return NULL; 1533 1534 RB_CLEAR_NODE(&spg->node); 1535 spg->backoffs = RB_ROOT; 1536 return spg; 1537 } 1538 1539 static void free_spg_mapping(struct ceph_spg_mapping *spg) 1540 { 1541 WARN_ON(!RB_EMPTY_NODE(&spg->node)); 1542 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs)); 1543 1544 kfree(spg); 1545 } 1546 1547 /* 1548 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to 1549 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is 1550 * defined only within a specific spgid; it does not pass anything to 1551 * children on split, or to another primary. 1552 */ 1553 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare, 1554 RB_BYPTR, const struct ceph_spg *, node) 1555 1556 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid) 1557 { 1558 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits; 1559 } 1560 1561 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid, 1562 void **pkey, size_t *pkey_len) 1563 { 1564 if (hoid->key_len) { 1565 *pkey = hoid->key; 1566 *pkey_len = hoid->key_len; 1567 } else { 1568 *pkey = hoid->oid; 1569 *pkey_len = hoid->oid_len; 1570 } 1571 } 1572 1573 static int compare_names(const void *name1, size_t name1_len, 1574 const void *name2, size_t name2_len) 1575 { 1576 int ret; 1577 1578 ret = memcmp(name1, name2, min(name1_len, name2_len)); 1579 if (!ret) { 1580 if (name1_len < name2_len) 1581 ret = -1; 1582 else if (name1_len > name2_len) 1583 ret = 1; 1584 } 1585 return ret; 1586 } 1587 1588 static int hoid_compare(const struct ceph_hobject_id *lhs, 1589 const struct ceph_hobject_id *rhs) 1590 { 1591 void *effective_key1, *effective_key2; 1592 size_t effective_key1_len, effective_key2_len; 1593 int ret; 1594 1595 if (lhs->is_max < rhs->is_max) 1596 return -1; 1597 if (lhs->is_max > rhs->is_max) 1598 return 1; 1599 1600 if (lhs->pool < rhs->pool) 1601 return -1; 1602 if (lhs->pool > rhs->pool) 1603 return 1; 1604 1605 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs)) 1606 return -1; 1607 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs)) 1608 return 1; 1609 1610 ret = compare_names(lhs->nspace, lhs->nspace_len, 1611 rhs->nspace, rhs->nspace_len); 1612 if (ret) 1613 return ret; 1614 1615 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len); 1616 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len); 1617 ret = compare_names(effective_key1, effective_key1_len, 1618 effective_key2, effective_key2_len); 1619 if (ret) 1620 return ret; 1621 1622 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len); 1623 if (ret) 1624 return ret; 1625 1626 if (lhs->snapid < rhs->snapid) 1627 return -1; 1628 if (lhs->snapid > rhs->snapid) 1629 return 1; 1630 1631 return 0; 1632 } 1633 1634 /* 1635 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX 1636 * compat stuff here. 1637 * 1638 * Assumes @hoid is zero-initialized. 1639 */ 1640 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid) 1641 { 1642 u8 struct_v; 1643 u32 struct_len; 1644 int ret; 1645 1646 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v, 1647 &struct_len); 1648 if (ret) 1649 return ret; 1650 1651 if (struct_v < 4) { 1652 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v); 1653 goto e_inval; 1654 } 1655 1656 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len, 1657 GFP_NOIO); 1658 if (IS_ERR(hoid->key)) { 1659 ret = PTR_ERR(hoid->key); 1660 hoid->key = NULL; 1661 return ret; 1662 } 1663 1664 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len, 1665 GFP_NOIO); 1666 if (IS_ERR(hoid->oid)) { 1667 ret = PTR_ERR(hoid->oid); 1668 hoid->oid = NULL; 1669 return ret; 1670 } 1671 1672 ceph_decode_64_safe(p, end, hoid->snapid, e_inval); 1673 ceph_decode_32_safe(p, end, hoid->hash, e_inval); 1674 ceph_decode_8_safe(p, end, hoid->is_max, e_inval); 1675 1676 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len, 1677 GFP_NOIO); 1678 if (IS_ERR(hoid->nspace)) { 1679 ret = PTR_ERR(hoid->nspace); 1680 hoid->nspace = NULL; 1681 return ret; 1682 } 1683 1684 ceph_decode_64_safe(p, end, hoid->pool, e_inval); 1685 1686 ceph_hoid_build_hash_cache(hoid); 1687 return 0; 1688 1689 e_inval: 1690 return -EINVAL; 1691 } 1692 1693 static int hoid_encoding_size(const struct ceph_hobject_id *hoid) 1694 { 1695 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */ 1696 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len; 1697 } 1698 1699 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid) 1700 { 1701 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid)); 1702 ceph_encode_string(p, end, hoid->key, hoid->key_len); 1703 ceph_encode_string(p, end, hoid->oid, hoid->oid_len); 1704 ceph_encode_64(p, hoid->snapid); 1705 ceph_encode_32(p, hoid->hash); 1706 ceph_encode_8(p, hoid->is_max); 1707 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len); 1708 ceph_encode_64(p, hoid->pool); 1709 } 1710 1711 static void free_hoid(struct ceph_hobject_id *hoid) 1712 { 1713 if (hoid) { 1714 kfree(hoid->key); 1715 kfree(hoid->oid); 1716 kfree(hoid->nspace); 1717 kfree(hoid); 1718 } 1719 } 1720 1721 static struct ceph_osd_backoff *alloc_backoff(void) 1722 { 1723 struct ceph_osd_backoff *backoff; 1724 1725 backoff = kzalloc(sizeof(*backoff), GFP_NOIO); 1726 if (!backoff) 1727 return NULL; 1728 1729 RB_CLEAR_NODE(&backoff->spg_node); 1730 RB_CLEAR_NODE(&backoff->id_node); 1731 return backoff; 1732 } 1733 1734 static void free_backoff(struct ceph_osd_backoff *backoff) 1735 { 1736 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node)); 1737 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node)); 1738 1739 free_hoid(backoff->begin); 1740 free_hoid(backoff->end); 1741 kfree(backoff); 1742 } 1743 1744 /* 1745 * Within a specific spgid, backoffs are managed by ->begin hoid. 1746 */ 1747 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare, 1748 RB_BYVAL, spg_node); 1749 1750 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root, 1751 const struct ceph_hobject_id *hoid) 1752 { 1753 struct rb_node *n = root->rb_node; 1754 1755 while (n) { 1756 struct ceph_osd_backoff *cur = 1757 rb_entry(n, struct ceph_osd_backoff, spg_node); 1758 int cmp; 1759 1760 cmp = hoid_compare(hoid, cur->begin); 1761 if (cmp < 0) { 1762 n = n->rb_left; 1763 } else if (cmp > 0) { 1764 if (hoid_compare(hoid, cur->end) < 0) 1765 return cur; 1766 1767 n = n->rb_right; 1768 } else { 1769 return cur; 1770 } 1771 } 1772 1773 return NULL; 1774 } 1775 1776 /* 1777 * Each backoff has a unique id within its OSD session. 1778 */ 1779 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node) 1780 1781 static void clear_backoffs(struct ceph_osd *osd) 1782 { 1783 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) { 1784 struct ceph_spg_mapping *spg = 1785 rb_entry(rb_first(&osd->o_backoff_mappings), 1786 struct ceph_spg_mapping, node); 1787 1788 while (!RB_EMPTY_ROOT(&spg->backoffs)) { 1789 struct ceph_osd_backoff *backoff = 1790 rb_entry(rb_first(&spg->backoffs), 1791 struct ceph_osd_backoff, spg_node); 1792 1793 erase_backoff(&spg->backoffs, backoff); 1794 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 1795 free_backoff(backoff); 1796 } 1797 erase_spg_mapping(&osd->o_backoff_mappings, spg); 1798 free_spg_mapping(spg); 1799 } 1800 } 1801 1802 /* 1803 * Set up a temporary, non-owning view into @t. 1804 */ 1805 static void hoid_fill_from_target(struct ceph_hobject_id *hoid, 1806 const struct ceph_osd_request_target *t) 1807 { 1808 hoid->key = NULL; 1809 hoid->key_len = 0; 1810 hoid->oid = t->target_oid.name; 1811 hoid->oid_len = t->target_oid.name_len; 1812 hoid->snapid = CEPH_NOSNAP; 1813 hoid->hash = t->pgid.seed; 1814 hoid->is_max = false; 1815 if (t->target_oloc.pool_ns) { 1816 hoid->nspace = t->target_oloc.pool_ns->str; 1817 hoid->nspace_len = t->target_oloc.pool_ns->len; 1818 } else { 1819 hoid->nspace = NULL; 1820 hoid->nspace_len = 0; 1821 } 1822 hoid->pool = t->target_oloc.pool; 1823 ceph_hoid_build_hash_cache(hoid); 1824 } 1825 1826 static bool should_plug_request(struct ceph_osd_request *req) 1827 { 1828 struct ceph_osd *osd = req->r_osd; 1829 struct ceph_spg_mapping *spg; 1830 struct ceph_osd_backoff *backoff; 1831 struct ceph_hobject_id hoid; 1832 1833 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid); 1834 if (!spg) 1835 return false; 1836 1837 hoid_fill_from_target(&hoid, &req->r_t); 1838 backoff = lookup_containing_backoff(&spg->backoffs, &hoid); 1839 if (!backoff) 1840 return false; 1841 1842 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n", 1843 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool, 1844 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id); 1845 return true; 1846 } 1847 1848 static void setup_request_data(struct ceph_osd_request *req, 1849 struct ceph_msg *msg) 1850 { 1851 u32 data_len = 0; 1852 int i; 1853 1854 if (!list_empty(&msg->data)) 1855 return; 1856 1857 WARN_ON(msg->data_length); 1858 for (i = 0; i < req->r_num_ops; i++) { 1859 struct ceph_osd_req_op *op = &req->r_ops[i]; 1860 1861 switch (op->op) { 1862 /* request */ 1863 case CEPH_OSD_OP_WRITE: 1864 case CEPH_OSD_OP_WRITEFULL: 1865 WARN_ON(op->indata_len != op->extent.length); 1866 ceph_osdc_msg_data_add(msg, &op->extent.osd_data); 1867 break; 1868 case CEPH_OSD_OP_SETXATTR: 1869 case CEPH_OSD_OP_CMPXATTR: 1870 WARN_ON(op->indata_len != op->xattr.name_len + 1871 op->xattr.value_len); 1872 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data); 1873 break; 1874 case CEPH_OSD_OP_NOTIFY_ACK: 1875 ceph_osdc_msg_data_add(msg, 1876 &op->notify_ack.request_data); 1877 break; 1878 1879 /* reply */ 1880 case CEPH_OSD_OP_STAT: 1881 ceph_osdc_msg_data_add(req->r_reply, 1882 &op->raw_data_in); 1883 break; 1884 case CEPH_OSD_OP_READ: 1885 ceph_osdc_msg_data_add(req->r_reply, 1886 &op->extent.osd_data); 1887 break; 1888 case CEPH_OSD_OP_LIST_WATCHERS: 1889 ceph_osdc_msg_data_add(req->r_reply, 1890 &op->list_watchers.response_data); 1891 break; 1892 1893 /* both */ 1894 case CEPH_OSD_OP_CALL: 1895 WARN_ON(op->indata_len != op->cls.class_len + 1896 op->cls.method_len + 1897 op->cls.indata_len); 1898 ceph_osdc_msg_data_add(msg, &op->cls.request_info); 1899 /* optional, can be NONE */ 1900 ceph_osdc_msg_data_add(msg, &op->cls.request_data); 1901 /* optional, can be NONE */ 1902 ceph_osdc_msg_data_add(req->r_reply, 1903 &op->cls.response_data); 1904 break; 1905 case CEPH_OSD_OP_NOTIFY: 1906 ceph_osdc_msg_data_add(msg, 1907 &op->notify.request_data); 1908 ceph_osdc_msg_data_add(req->r_reply, 1909 &op->notify.response_data); 1910 break; 1911 } 1912 1913 data_len += op->indata_len; 1914 } 1915 1916 WARN_ON(data_len != msg->data_length); 1917 } 1918 1919 static void encode_pgid(void **p, const struct ceph_pg *pgid) 1920 { 1921 ceph_encode_8(p, 1); 1922 ceph_encode_64(p, pgid->pool); 1923 ceph_encode_32(p, pgid->seed); 1924 ceph_encode_32(p, -1); /* preferred */ 1925 } 1926 1927 static void encode_spgid(void **p, const struct ceph_spg *spgid) 1928 { 1929 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1); 1930 encode_pgid(p, &spgid->pgid); 1931 ceph_encode_8(p, spgid->shard); 1932 } 1933 1934 static void encode_oloc(void **p, void *end, 1935 const struct ceph_object_locator *oloc) 1936 { 1937 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc)); 1938 ceph_encode_64(p, oloc->pool); 1939 ceph_encode_32(p, -1); /* preferred */ 1940 ceph_encode_32(p, 0); /* key len */ 1941 if (oloc->pool_ns) 1942 ceph_encode_string(p, end, oloc->pool_ns->str, 1943 oloc->pool_ns->len); 1944 else 1945 ceph_encode_32(p, 0); 1946 } 1947 1948 static void encode_request_partial(struct ceph_osd_request *req, 1949 struct ceph_msg *msg) 1950 { 1951 void *p = msg->front.iov_base; 1952 void *const end = p + msg->front_alloc_len; 1953 u32 data_len = 0; 1954 int i; 1955 1956 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 1957 /* snapshots aren't writeable */ 1958 WARN_ON(req->r_snapid != CEPH_NOSNAP); 1959 } else { 1960 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 1961 req->r_data_offset || req->r_snapc); 1962 } 1963 1964 setup_request_data(req, msg); 1965 1966 encode_spgid(&p, &req->r_t.spgid); /* actual spg */ 1967 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */ 1968 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 1969 ceph_encode_32(&p, req->r_flags); 1970 1971 /* reqid */ 1972 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid)); 1973 memset(p, 0, sizeof(struct ceph_osd_reqid)); 1974 p += sizeof(struct ceph_osd_reqid); 1975 1976 /* trace */ 1977 memset(p, 0, sizeof(struct ceph_blkin_trace_info)); 1978 p += sizeof(struct ceph_blkin_trace_info); 1979 1980 ceph_encode_32(&p, 0); /* client_inc, always 0 */ 1981 ceph_encode_timespec64(p, &req->r_mtime); 1982 p += sizeof(struct ceph_timespec); 1983 1984 encode_oloc(&p, end, &req->r_t.target_oloc); 1985 ceph_encode_string(&p, end, req->r_t.target_oid.name, 1986 req->r_t.target_oid.name_len); 1987 1988 /* ops, can imply data */ 1989 ceph_encode_16(&p, req->r_num_ops); 1990 for (i = 0; i < req->r_num_ops; i++) { 1991 data_len += osd_req_encode_op(p, &req->r_ops[i]); 1992 p += sizeof(struct ceph_osd_op); 1993 } 1994 1995 ceph_encode_64(&p, req->r_snapid); /* snapid */ 1996 if (req->r_snapc) { 1997 ceph_encode_64(&p, req->r_snapc->seq); 1998 ceph_encode_32(&p, req->r_snapc->num_snaps); 1999 for (i = 0; i < req->r_snapc->num_snaps; i++) 2000 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2001 } else { 2002 ceph_encode_64(&p, 0); /* snap_seq */ 2003 ceph_encode_32(&p, 0); /* snaps len */ 2004 } 2005 2006 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 2007 BUG_ON(p > end - 8); /* space for features */ 2008 2009 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */ 2010 /* front_len is finalized in encode_request_finish() */ 2011 msg->front.iov_len = p - msg->front.iov_base; 2012 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2013 msg->hdr.data_len = cpu_to_le32(data_len); 2014 /* 2015 * The header "data_off" is a hint to the receiver allowing it 2016 * to align received data into its buffers such that there's no 2017 * need to re-copy it before writing it to disk (direct I/O). 2018 */ 2019 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 2020 2021 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg, 2022 req->r_t.target_oid.name, req->r_t.target_oid.name_len); 2023 } 2024 2025 static void encode_request_finish(struct ceph_msg *msg) 2026 { 2027 void *p = msg->front.iov_base; 2028 void *const partial_end = p + msg->front.iov_len; 2029 void *const end = p + msg->front_alloc_len; 2030 2031 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) { 2032 /* luminous OSD -- encode features and be done */ 2033 p = partial_end; 2034 ceph_encode_64(&p, msg->con->peer_features); 2035 } else { 2036 struct { 2037 char spgid[CEPH_ENCODING_START_BLK_LEN + 2038 CEPH_PGID_ENCODING_LEN + 1]; 2039 __le32 hash; 2040 __le32 epoch; 2041 __le32 flags; 2042 char reqid[CEPH_ENCODING_START_BLK_LEN + 2043 sizeof(struct ceph_osd_reqid)]; 2044 char trace[sizeof(struct ceph_blkin_trace_info)]; 2045 __le32 client_inc; 2046 struct ceph_timespec mtime; 2047 } __packed head; 2048 struct ceph_pg pgid; 2049 void *oloc, *oid, *tail; 2050 int oloc_len, oid_len, tail_len; 2051 int len; 2052 2053 /* 2054 * Pre-luminous OSD -- reencode v8 into v4 using @head 2055 * as a temporary buffer. Encode the raw PG; the rest 2056 * is just a matter of moving oloc, oid and tail blobs 2057 * around. 2058 */ 2059 memcpy(&head, p, sizeof(head)); 2060 p += sizeof(head); 2061 2062 oloc = p; 2063 p += CEPH_ENCODING_START_BLK_LEN; 2064 pgid.pool = ceph_decode_64(&p); 2065 p += 4 + 4; /* preferred, key len */ 2066 len = ceph_decode_32(&p); 2067 p += len; /* nspace */ 2068 oloc_len = p - oloc; 2069 2070 oid = p; 2071 len = ceph_decode_32(&p); 2072 p += len; 2073 oid_len = p - oid; 2074 2075 tail = p; 2076 tail_len = partial_end - p; 2077 2078 p = msg->front.iov_base; 2079 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc)); 2080 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch)); 2081 ceph_encode_copy(&p, &head.flags, sizeof(head.flags)); 2082 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime)); 2083 2084 /* reassert_version */ 2085 memset(p, 0, sizeof(struct ceph_eversion)); 2086 p += sizeof(struct ceph_eversion); 2087 2088 BUG_ON(p >= oloc); 2089 memmove(p, oloc, oloc_len); 2090 p += oloc_len; 2091 2092 pgid.seed = le32_to_cpu(head.hash); 2093 encode_pgid(&p, &pgid); /* raw pg */ 2094 2095 BUG_ON(p >= oid); 2096 memmove(p, oid, oid_len); 2097 p += oid_len; 2098 2099 /* tail -- ops, snapid, snapc, retry_attempt */ 2100 BUG_ON(p >= tail); 2101 memmove(p, tail, tail_len); 2102 p += tail_len; 2103 2104 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 2105 } 2106 2107 BUG_ON(p > end); 2108 msg->front.iov_len = p - msg->front.iov_base; 2109 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2110 2111 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg, 2112 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len), 2113 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len), 2114 le16_to_cpu(msg->hdr.version)); 2115 } 2116 2117 /* 2118 * @req has to be assigned a tid and registered. 2119 */ 2120 static void send_request(struct ceph_osd_request *req) 2121 { 2122 struct ceph_osd *osd = req->r_osd; 2123 2124 verify_osd_locked(osd); 2125 WARN_ON(osd->o_osd != req->r_t.osd); 2126 2127 /* backoff? */ 2128 if (should_plug_request(req)) 2129 return; 2130 2131 /* 2132 * We may have a previously queued request message hanging 2133 * around. Cancel it to avoid corrupting the msgr. 2134 */ 2135 if (req->r_sent) 2136 ceph_msg_revoke(req->r_request); 2137 2138 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 2139 if (req->r_attempts) 2140 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2141 else 2142 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 2143 2144 encode_request_partial(req, req->r_request); 2145 2146 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n", 2147 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 2148 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed, 2149 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags, 2150 req->r_attempts); 2151 2152 req->r_t.paused = false; 2153 req->r_stamp = jiffies; 2154 req->r_attempts++; 2155 2156 req->r_sent = osd->o_incarnation; 2157 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 2158 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 2159 } 2160 2161 static void maybe_request_map(struct ceph_osd_client *osdc) 2162 { 2163 bool continuous = false; 2164 2165 verify_osdc_locked(osdc); 2166 WARN_ON(!osdc->osdmap->epoch); 2167 2168 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2169 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 2170 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2171 dout("%s osdc %p continuous\n", __func__, osdc); 2172 continuous = true; 2173 } else { 2174 dout("%s osdc %p onetime\n", __func__, osdc); 2175 } 2176 2177 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 2178 osdc->osdmap->epoch + 1, continuous)) 2179 ceph_monc_renew_subs(&osdc->client->monc); 2180 } 2181 2182 static void complete_request(struct ceph_osd_request *req, int err); 2183 static void send_map_check(struct ceph_osd_request *req); 2184 2185 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 2186 { 2187 struct ceph_osd_client *osdc = req->r_osdc; 2188 struct ceph_osd *osd; 2189 enum calc_target_result ct_res; 2190 int err = 0; 2191 bool need_send = false; 2192 bool promoted = false; 2193 2194 WARN_ON(req->r_tid); 2195 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 2196 2197 again: 2198 ct_res = calc_target(osdc, &req->r_t, NULL, false); 2199 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 2200 goto promote; 2201 2202 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 2203 if (IS_ERR(osd)) { 2204 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 2205 goto promote; 2206 } 2207 2208 if (osdc->abort_err) { 2209 dout("req %p abort_err %d\n", req, osdc->abort_err); 2210 err = osdc->abort_err; 2211 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) { 2212 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch, 2213 osdc->epoch_barrier); 2214 req->r_t.paused = true; 2215 maybe_request_map(osdc); 2216 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2217 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2218 dout("req %p pausewr\n", req); 2219 req->r_t.paused = true; 2220 maybe_request_map(osdc); 2221 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 2222 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2223 dout("req %p pauserd\n", req); 2224 req->r_t.paused = true; 2225 maybe_request_map(osdc); 2226 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2227 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 2228 CEPH_OSD_FLAG_FULL_FORCE)) && 2229 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2230 pool_full(osdc, req->r_t.base_oloc.pool))) { 2231 dout("req %p full/pool_full\n", req); 2232 if (osdc->abort_on_full) { 2233 err = -ENOSPC; 2234 } else { 2235 pr_warn_ratelimited("FULL or reached pool quota\n"); 2236 req->r_t.paused = true; 2237 maybe_request_map(osdc); 2238 } 2239 } else if (!osd_homeless(osd)) { 2240 need_send = true; 2241 } else { 2242 maybe_request_map(osdc); 2243 } 2244 2245 mutex_lock(&osd->lock); 2246 /* 2247 * Assign the tid atomically with send_request() to protect 2248 * multiple writes to the same object from racing with each 2249 * other, resulting in out of order ops on the OSDs. 2250 */ 2251 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2252 link_request(osd, req); 2253 if (need_send) 2254 send_request(req); 2255 else if (err) 2256 complete_request(req, err); 2257 mutex_unlock(&osd->lock); 2258 2259 if (!err && ct_res == CALC_TARGET_POOL_DNE) 2260 send_map_check(req); 2261 2262 if (promoted) 2263 downgrade_write(&osdc->lock); 2264 return; 2265 2266 promote: 2267 up_read(&osdc->lock); 2268 down_write(&osdc->lock); 2269 wrlocked = true; 2270 promoted = true; 2271 goto again; 2272 } 2273 2274 static void account_request(struct ceph_osd_request *req) 2275 { 2276 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK)); 2277 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE))); 2278 2279 req->r_flags |= CEPH_OSD_FLAG_ONDISK; 2280 atomic_inc(&req->r_osdc->num_requests); 2281 2282 req->r_start_stamp = jiffies; 2283 } 2284 2285 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 2286 { 2287 ceph_osdc_get_request(req); 2288 account_request(req); 2289 __submit_request(req, wrlocked); 2290 } 2291 2292 static void finish_request(struct ceph_osd_request *req) 2293 { 2294 struct ceph_osd_client *osdc = req->r_osdc; 2295 2296 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 2297 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2298 2299 if (req->r_osd) 2300 unlink_request(req->r_osd, req); 2301 atomic_dec(&osdc->num_requests); 2302 2303 /* 2304 * If an OSD has failed or returned and a request has been sent 2305 * twice, it's possible to get a reply and end up here while the 2306 * request message is queued for delivery. We will ignore the 2307 * reply, so not a big deal, but better to try and catch it. 2308 */ 2309 ceph_msg_revoke(req->r_request); 2310 ceph_msg_revoke_incoming(req->r_reply); 2311 } 2312 2313 static void __complete_request(struct ceph_osd_request *req) 2314 { 2315 dout("%s req %p tid %llu cb %pf result %d\n", __func__, req, 2316 req->r_tid, req->r_callback, req->r_result); 2317 2318 if (req->r_callback) 2319 req->r_callback(req); 2320 complete_all(&req->r_completion); 2321 ceph_osdc_put_request(req); 2322 } 2323 2324 static void complete_request_workfn(struct work_struct *work) 2325 { 2326 struct ceph_osd_request *req = 2327 container_of(work, struct ceph_osd_request, r_complete_work); 2328 2329 __complete_request(req); 2330 } 2331 2332 /* 2333 * This is open-coded in handle_reply(). 2334 */ 2335 static void complete_request(struct ceph_osd_request *req, int err) 2336 { 2337 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2338 2339 req->r_result = err; 2340 finish_request(req); 2341 2342 INIT_WORK(&req->r_complete_work, complete_request_workfn); 2343 queue_work(req->r_osdc->completion_wq, &req->r_complete_work); 2344 } 2345 2346 static void cancel_map_check(struct ceph_osd_request *req) 2347 { 2348 struct ceph_osd_client *osdc = req->r_osdc; 2349 struct ceph_osd_request *lookup_req; 2350 2351 verify_osdc_wrlocked(osdc); 2352 2353 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2354 if (!lookup_req) 2355 return; 2356 2357 WARN_ON(lookup_req != req); 2358 erase_request_mc(&osdc->map_checks, req); 2359 ceph_osdc_put_request(req); 2360 } 2361 2362 static void cancel_request(struct ceph_osd_request *req) 2363 { 2364 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2365 2366 cancel_map_check(req); 2367 finish_request(req); 2368 complete_all(&req->r_completion); 2369 ceph_osdc_put_request(req); 2370 } 2371 2372 static void abort_request(struct ceph_osd_request *req, int err) 2373 { 2374 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2375 2376 cancel_map_check(req); 2377 complete_request(req, err); 2378 } 2379 2380 static int abort_fn(struct ceph_osd_request *req, void *arg) 2381 { 2382 int err = *(int *)arg; 2383 2384 abort_request(req, err); 2385 return 0; /* continue iteration */ 2386 } 2387 2388 /* 2389 * Abort all in-flight requests with @err and arrange for all future 2390 * requests to be failed immediately. 2391 */ 2392 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err) 2393 { 2394 dout("%s osdc %p err %d\n", __func__, osdc, err); 2395 down_write(&osdc->lock); 2396 for_each_request(osdc, abort_fn, &err); 2397 osdc->abort_err = err; 2398 up_write(&osdc->lock); 2399 } 2400 EXPORT_SYMBOL(ceph_osdc_abort_requests); 2401 2402 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2403 { 2404 if (likely(eb > osdc->epoch_barrier)) { 2405 dout("updating epoch_barrier from %u to %u\n", 2406 osdc->epoch_barrier, eb); 2407 osdc->epoch_barrier = eb; 2408 /* Request map if we're not to the barrier yet */ 2409 if (eb > osdc->osdmap->epoch) 2410 maybe_request_map(osdc); 2411 } 2412 } 2413 2414 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2415 { 2416 down_read(&osdc->lock); 2417 if (unlikely(eb > osdc->epoch_barrier)) { 2418 up_read(&osdc->lock); 2419 down_write(&osdc->lock); 2420 update_epoch_barrier(osdc, eb); 2421 up_write(&osdc->lock); 2422 } else { 2423 up_read(&osdc->lock); 2424 } 2425 } 2426 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier); 2427 2428 /* 2429 * We can end up releasing caps as a result of abort_request(). 2430 * In that case, we probably want to ensure that the cap release message 2431 * has an updated epoch barrier in it, so set the epoch barrier prior to 2432 * aborting the first request. 2433 */ 2434 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg) 2435 { 2436 struct ceph_osd_client *osdc = req->r_osdc; 2437 bool *victims = arg; 2438 2439 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2440 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2441 pool_full(osdc, req->r_t.base_oloc.pool))) { 2442 if (!*victims) { 2443 update_epoch_barrier(osdc, osdc->osdmap->epoch); 2444 *victims = true; 2445 } 2446 abort_request(req, -ENOSPC); 2447 } 2448 2449 return 0; /* continue iteration */ 2450 } 2451 2452 /* 2453 * Drop all pending requests that are stalled waiting on a full condition to 2454 * clear, and complete them with ENOSPC as the return code. Set the 2455 * osdc->epoch_barrier to the latest map epoch that we've seen if any were 2456 * cancelled. 2457 */ 2458 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc) 2459 { 2460 bool victims = false; 2461 2462 if (osdc->abort_on_full && 2463 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc))) 2464 for_each_request(osdc, abort_on_full_fn, &victims); 2465 } 2466 2467 static void check_pool_dne(struct ceph_osd_request *req) 2468 { 2469 struct ceph_osd_client *osdc = req->r_osdc; 2470 struct ceph_osdmap *map = osdc->osdmap; 2471 2472 verify_osdc_wrlocked(osdc); 2473 WARN_ON(!map->epoch); 2474 2475 if (req->r_attempts) { 2476 /* 2477 * We sent a request earlier, which means that 2478 * previously the pool existed, and now it does not 2479 * (i.e., it was deleted). 2480 */ 2481 req->r_map_dne_bound = map->epoch; 2482 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 2483 req->r_tid); 2484 } else { 2485 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 2486 req, req->r_tid, req->r_map_dne_bound, map->epoch); 2487 } 2488 2489 if (req->r_map_dne_bound) { 2490 if (map->epoch >= req->r_map_dne_bound) { 2491 /* we had a new enough map */ 2492 pr_info_ratelimited("tid %llu pool does not exist\n", 2493 req->r_tid); 2494 complete_request(req, -ENOENT); 2495 } 2496 } else { 2497 send_map_check(req); 2498 } 2499 } 2500 2501 static void map_check_cb(struct ceph_mon_generic_request *greq) 2502 { 2503 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2504 struct ceph_osd_request *req; 2505 u64 tid = greq->private_data; 2506 2507 WARN_ON(greq->result || !greq->u.newest); 2508 2509 down_write(&osdc->lock); 2510 req = lookup_request_mc(&osdc->map_checks, tid); 2511 if (!req) { 2512 dout("%s tid %llu dne\n", __func__, tid); 2513 goto out_unlock; 2514 } 2515 2516 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 2517 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 2518 if (!req->r_map_dne_bound) 2519 req->r_map_dne_bound = greq->u.newest; 2520 erase_request_mc(&osdc->map_checks, req); 2521 check_pool_dne(req); 2522 2523 ceph_osdc_put_request(req); 2524 out_unlock: 2525 up_write(&osdc->lock); 2526 } 2527 2528 static void send_map_check(struct ceph_osd_request *req) 2529 { 2530 struct ceph_osd_client *osdc = req->r_osdc; 2531 struct ceph_osd_request *lookup_req; 2532 int ret; 2533 2534 verify_osdc_wrlocked(osdc); 2535 2536 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2537 if (lookup_req) { 2538 WARN_ON(lookup_req != req); 2539 return; 2540 } 2541 2542 ceph_osdc_get_request(req); 2543 insert_request_mc(&osdc->map_checks, req); 2544 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2545 map_check_cb, req->r_tid); 2546 WARN_ON(ret); 2547 } 2548 2549 /* 2550 * lingering requests, watch/notify v2 infrastructure 2551 */ 2552 static void linger_release(struct kref *kref) 2553 { 2554 struct ceph_osd_linger_request *lreq = 2555 container_of(kref, struct ceph_osd_linger_request, kref); 2556 2557 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 2558 lreq->reg_req, lreq->ping_req); 2559 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 2560 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 2561 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 2562 WARN_ON(!list_empty(&lreq->scan_item)); 2563 WARN_ON(!list_empty(&lreq->pending_lworks)); 2564 WARN_ON(lreq->osd); 2565 2566 if (lreq->reg_req) 2567 ceph_osdc_put_request(lreq->reg_req); 2568 if (lreq->ping_req) 2569 ceph_osdc_put_request(lreq->ping_req); 2570 target_destroy(&lreq->t); 2571 kfree(lreq); 2572 } 2573 2574 static void linger_put(struct ceph_osd_linger_request *lreq) 2575 { 2576 if (lreq) 2577 kref_put(&lreq->kref, linger_release); 2578 } 2579 2580 static struct ceph_osd_linger_request * 2581 linger_get(struct ceph_osd_linger_request *lreq) 2582 { 2583 kref_get(&lreq->kref); 2584 return lreq; 2585 } 2586 2587 static struct ceph_osd_linger_request * 2588 linger_alloc(struct ceph_osd_client *osdc) 2589 { 2590 struct ceph_osd_linger_request *lreq; 2591 2592 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 2593 if (!lreq) 2594 return NULL; 2595 2596 kref_init(&lreq->kref); 2597 mutex_init(&lreq->lock); 2598 RB_CLEAR_NODE(&lreq->node); 2599 RB_CLEAR_NODE(&lreq->osdc_node); 2600 RB_CLEAR_NODE(&lreq->mc_node); 2601 INIT_LIST_HEAD(&lreq->scan_item); 2602 INIT_LIST_HEAD(&lreq->pending_lworks); 2603 init_completion(&lreq->reg_commit_wait); 2604 init_completion(&lreq->notify_finish_wait); 2605 2606 lreq->osdc = osdc; 2607 target_init(&lreq->t); 2608 2609 dout("%s lreq %p\n", __func__, lreq); 2610 return lreq; 2611 } 2612 2613 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 2614 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 2615 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 2616 2617 /* 2618 * Create linger request <-> OSD session relation. 2619 * 2620 * @lreq has to be registered, @osd may be homeless. 2621 */ 2622 static void link_linger(struct ceph_osd *osd, 2623 struct ceph_osd_linger_request *lreq) 2624 { 2625 verify_osd_locked(osd); 2626 WARN_ON(!lreq->linger_id || lreq->osd); 2627 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2628 osd->o_osd, lreq, lreq->linger_id); 2629 2630 if (!osd_homeless(osd)) 2631 __remove_osd_from_lru(osd); 2632 else 2633 atomic_inc(&osd->o_osdc->num_homeless); 2634 2635 get_osd(osd); 2636 insert_linger(&osd->o_linger_requests, lreq); 2637 lreq->osd = osd; 2638 } 2639 2640 static void unlink_linger(struct ceph_osd *osd, 2641 struct ceph_osd_linger_request *lreq) 2642 { 2643 verify_osd_locked(osd); 2644 WARN_ON(lreq->osd != osd); 2645 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2646 osd->o_osd, lreq, lreq->linger_id); 2647 2648 lreq->osd = NULL; 2649 erase_linger(&osd->o_linger_requests, lreq); 2650 put_osd(osd); 2651 2652 if (!osd_homeless(osd)) 2653 maybe_move_osd_to_lru(osd); 2654 else 2655 atomic_dec(&osd->o_osdc->num_homeless); 2656 } 2657 2658 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 2659 { 2660 verify_osdc_locked(lreq->osdc); 2661 2662 return !RB_EMPTY_NODE(&lreq->osdc_node); 2663 } 2664 2665 static bool linger_registered(struct ceph_osd_linger_request *lreq) 2666 { 2667 struct ceph_osd_client *osdc = lreq->osdc; 2668 bool registered; 2669 2670 down_read(&osdc->lock); 2671 registered = __linger_registered(lreq); 2672 up_read(&osdc->lock); 2673 2674 return registered; 2675 } 2676 2677 static void linger_register(struct ceph_osd_linger_request *lreq) 2678 { 2679 struct ceph_osd_client *osdc = lreq->osdc; 2680 2681 verify_osdc_wrlocked(osdc); 2682 WARN_ON(lreq->linger_id); 2683 2684 linger_get(lreq); 2685 lreq->linger_id = ++osdc->last_linger_id; 2686 insert_linger_osdc(&osdc->linger_requests, lreq); 2687 } 2688 2689 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2690 { 2691 struct ceph_osd_client *osdc = lreq->osdc; 2692 2693 verify_osdc_wrlocked(osdc); 2694 2695 erase_linger_osdc(&osdc->linger_requests, lreq); 2696 linger_put(lreq); 2697 } 2698 2699 static void cancel_linger_request(struct ceph_osd_request *req) 2700 { 2701 struct ceph_osd_linger_request *lreq = req->r_priv; 2702 2703 WARN_ON(!req->r_linger); 2704 cancel_request(req); 2705 linger_put(lreq); 2706 } 2707 2708 struct linger_work { 2709 struct work_struct work; 2710 struct ceph_osd_linger_request *lreq; 2711 struct list_head pending_item; 2712 unsigned long queued_stamp; 2713 2714 union { 2715 struct { 2716 u64 notify_id; 2717 u64 notifier_id; 2718 void *payload; /* points into @msg front */ 2719 size_t payload_len; 2720 2721 struct ceph_msg *msg; /* for ceph_msg_put() */ 2722 } notify; 2723 struct { 2724 int err; 2725 } error; 2726 }; 2727 }; 2728 2729 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2730 work_func_t workfn) 2731 { 2732 struct linger_work *lwork; 2733 2734 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2735 if (!lwork) 2736 return NULL; 2737 2738 INIT_WORK(&lwork->work, workfn); 2739 INIT_LIST_HEAD(&lwork->pending_item); 2740 lwork->lreq = linger_get(lreq); 2741 2742 return lwork; 2743 } 2744 2745 static void lwork_free(struct linger_work *lwork) 2746 { 2747 struct ceph_osd_linger_request *lreq = lwork->lreq; 2748 2749 mutex_lock(&lreq->lock); 2750 list_del(&lwork->pending_item); 2751 mutex_unlock(&lreq->lock); 2752 2753 linger_put(lreq); 2754 kfree(lwork); 2755 } 2756 2757 static void lwork_queue(struct linger_work *lwork) 2758 { 2759 struct ceph_osd_linger_request *lreq = lwork->lreq; 2760 struct ceph_osd_client *osdc = lreq->osdc; 2761 2762 verify_lreq_locked(lreq); 2763 WARN_ON(!list_empty(&lwork->pending_item)); 2764 2765 lwork->queued_stamp = jiffies; 2766 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2767 queue_work(osdc->notify_wq, &lwork->work); 2768 } 2769 2770 static void do_watch_notify(struct work_struct *w) 2771 { 2772 struct linger_work *lwork = container_of(w, struct linger_work, work); 2773 struct ceph_osd_linger_request *lreq = lwork->lreq; 2774 2775 if (!linger_registered(lreq)) { 2776 dout("%s lreq %p not registered\n", __func__, lreq); 2777 goto out; 2778 } 2779 2780 WARN_ON(!lreq->is_watch); 2781 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2782 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2783 lwork->notify.payload_len); 2784 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2785 lwork->notify.notifier_id, lwork->notify.payload, 2786 lwork->notify.payload_len); 2787 2788 out: 2789 ceph_msg_put(lwork->notify.msg); 2790 lwork_free(lwork); 2791 } 2792 2793 static void do_watch_error(struct work_struct *w) 2794 { 2795 struct linger_work *lwork = container_of(w, struct linger_work, work); 2796 struct ceph_osd_linger_request *lreq = lwork->lreq; 2797 2798 if (!linger_registered(lreq)) { 2799 dout("%s lreq %p not registered\n", __func__, lreq); 2800 goto out; 2801 } 2802 2803 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2804 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2805 2806 out: 2807 lwork_free(lwork); 2808 } 2809 2810 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2811 { 2812 struct linger_work *lwork; 2813 2814 lwork = lwork_alloc(lreq, do_watch_error); 2815 if (!lwork) { 2816 pr_err("failed to allocate error-lwork\n"); 2817 return; 2818 } 2819 2820 lwork->error.err = lreq->last_error; 2821 lwork_queue(lwork); 2822 } 2823 2824 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2825 int result) 2826 { 2827 if (!completion_done(&lreq->reg_commit_wait)) { 2828 lreq->reg_commit_error = (result <= 0 ? result : 0); 2829 complete_all(&lreq->reg_commit_wait); 2830 } 2831 } 2832 2833 static void linger_commit_cb(struct ceph_osd_request *req) 2834 { 2835 struct ceph_osd_linger_request *lreq = req->r_priv; 2836 2837 mutex_lock(&lreq->lock); 2838 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2839 lreq->linger_id, req->r_result); 2840 linger_reg_commit_complete(lreq, req->r_result); 2841 lreq->committed = true; 2842 2843 if (!lreq->is_watch) { 2844 struct ceph_osd_data *osd_data = 2845 osd_req_op_data(req, 0, notify, response_data); 2846 void *p = page_address(osd_data->pages[0]); 2847 2848 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2849 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2850 2851 /* make note of the notify_id */ 2852 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2853 lreq->notify_id = ceph_decode_64(&p); 2854 dout("lreq %p notify_id %llu\n", lreq, 2855 lreq->notify_id); 2856 } else { 2857 dout("lreq %p no notify_id\n", lreq); 2858 } 2859 } 2860 2861 mutex_unlock(&lreq->lock); 2862 linger_put(lreq); 2863 } 2864 2865 static int normalize_watch_error(int err) 2866 { 2867 /* 2868 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2869 * notification and a failure to reconnect because we raced with 2870 * the delete appear the same to the user. 2871 */ 2872 if (err == -ENOENT) 2873 err = -ENOTCONN; 2874 2875 return err; 2876 } 2877 2878 static void linger_reconnect_cb(struct ceph_osd_request *req) 2879 { 2880 struct ceph_osd_linger_request *lreq = req->r_priv; 2881 2882 mutex_lock(&lreq->lock); 2883 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2884 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2885 if (req->r_result < 0) { 2886 if (!lreq->last_error) { 2887 lreq->last_error = normalize_watch_error(req->r_result); 2888 queue_watch_error(lreq); 2889 } 2890 } 2891 2892 mutex_unlock(&lreq->lock); 2893 linger_put(lreq); 2894 } 2895 2896 static void send_linger(struct ceph_osd_linger_request *lreq) 2897 { 2898 struct ceph_osd_request *req = lreq->reg_req; 2899 struct ceph_osd_req_op *op = &req->r_ops[0]; 2900 2901 verify_osdc_wrlocked(req->r_osdc); 2902 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2903 2904 if (req->r_osd) 2905 cancel_linger_request(req); 2906 2907 request_reinit(req); 2908 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 2909 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 2910 req->r_flags = lreq->t.flags; 2911 req->r_mtime = lreq->mtime; 2912 2913 mutex_lock(&lreq->lock); 2914 if (lreq->is_watch && lreq->committed) { 2915 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2916 op->watch.cookie != lreq->linger_id); 2917 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 2918 op->watch.gen = ++lreq->register_gen; 2919 dout("lreq %p reconnect register_gen %u\n", lreq, 2920 op->watch.gen); 2921 req->r_callback = linger_reconnect_cb; 2922 } else { 2923 if (!lreq->is_watch) 2924 lreq->notify_id = 0; 2925 else 2926 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 2927 dout("lreq %p register\n", lreq); 2928 req->r_callback = linger_commit_cb; 2929 } 2930 mutex_unlock(&lreq->lock); 2931 2932 req->r_priv = linger_get(lreq); 2933 req->r_linger = true; 2934 2935 submit_request(req, true); 2936 } 2937 2938 static void linger_ping_cb(struct ceph_osd_request *req) 2939 { 2940 struct ceph_osd_linger_request *lreq = req->r_priv; 2941 2942 mutex_lock(&lreq->lock); 2943 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 2944 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 2945 lreq->last_error); 2946 if (lreq->register_gen == req->r_ops[0].watch.gen) { 2947 if (!req->r_result) { 2948 lreq->watch_valid_thru = lreq->ping_sent; 2949 } else if (!lreq->last_error) { 2950 lreq->last_error = normalize_watch_error(req->r_result); 2951 queue_watch_error(lreq); 2952 } 2953 } else { 2954 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 2955 lreq->register_gen, req->r_ops[0].watch.gen); 2956 } 2957 2958 mutex_unlock(&lreq->lock); 2959 linger_put(lreq); 2960 } 2961 2962 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 2963 { 2964 struct ceph_osd_client *osdc = lreq->osdc; 2965 struct ceph_osd_request *req = lreq->ping_req; 2966 struct ceph_osd_req_op *op = &req->r_ops[0]; 2967 2968 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2969 dout("%s PAUSERD\n", __func__); 2970 return; 2971 } 2972 2973 lreq->ping_sent = jiffies; 2974 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 2975 __func__, lreq, lreq->linger_id, lreq->ping_sent, 2976 lreq->register_gen); 2977 2978 if (req->r_osd) 2979 cancel_linger_request(req); 2980 2981 request_reinit(req); 2982 target_copy(&req->r_t, &lreq->t); 2983 2984 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2985 op->watch.cookie != lreq->linger_id || 2986 op->watch.op != CEPH_OSD_WATCH_OP_PING); 2987 op->watch.gen = lreq->register_gen; 2988 req->r_callback = linger_ping_cb; 2989 req->r_priv = linger_get(lreq); 2990 req->r_linger = true; 2991 2992 ceph_osdc_get_request(req); 2993 account_request(req); 2994 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2995 link_request(lreq->osd, req); 2996 send_request(req); 2997 } 2998 2999 static void linger_submit(struct ceph_osd_linger_request *lreq) 3000 { 3001 struct ceph_osd_client *osdc = lreq->osdc; 3002 struct ceph_osd *osd; 3003 3004 calc_target(osdc, &lreq->t, NULL, false); 3005 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3006 link_linger(osd, lreq); 3007 3008 send_linger(lreq); 3009 } 3010 3011 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 3012 { 3013 struct ceph_osd_client *osdc = lreq->osdc; 3014 struct ceph_osd_linger_request *lookup_lreq; 3015 3016 verify_osdc_wrlocked(osdc); 3017 3018 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3019 lreq->linger_id); 3020 if (!lookup_lreq) 3021 return; 3022 3023 WARN_ON(lookup_lreq != lreq); 3024 erase_linger_mc(&osdc->linger_map_checks, lreq); 3025 linger_put(lreq); 3026 } 3027 3028 /* 3029 * @lreq has to be both registered and linked. 3030 */ 3031 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 3032 { 3033 if (lreq->is_watch && lreq->ping_req->r_osd) 3034 cancel_linger_request(lreq->ping_req); 3035 if (lreq->reg_req->r_osd) 3036 cancel_linger_request(lreq->reg_req); 3037 cancel_linger_map_check(lreq); 3038 unlink_linger(lreq->osd, lreq); 3039 linger_unregister(lreq); 3040 } 3041 3042 static void linger_cancel(struct ceph_osd_linger_request *lreq) 3043 { 3044 struct ceph_osd_client *osdc = lreq->osdc; 3045 3046 down_write(&osdc->lock); 3047 if (__linger_registered(lreq)) 3048 __linger_cancel(lreq); 3049 up_write(&osdc->lock); 3050 } 3051 3052 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 3053 3054 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 3055 { 3056 struct ceph_osd_client *osdc = lreq->osdc; 3057 struct ceph_osdmap *map = osdc->osdmap; 3058 3059 verify_osdc_wrlocked(osdc); 3060 WARN_ON(!map->epoch); 3061 3062 if (lreq->register_gen) { 3063 lreq->map_dne_bound = map->epoch; 3064 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 3065 lreq, lreq->linger_id); 3066 } else { 3067 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 3068 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3069 map->epoch); 3070 } 3071 3072 if (lreq->map_dne_bound) { 3073 if (map->epoch >= lreq->map_dne_bound) { 3074 /* we had a new enough map */ 3075 pr_info("linger_id %llu pool does not exist\n", 3076 lreq->linger_id); 3077 linger_reg_commit_complete(lreq, -ENOENT); 3078 __linger_cancel(lreq); 3079 } 3080 } else { 3081 send_linger_map_check(lreq); 3082 } 3083 } 3084 3085 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 3086 { 3087 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 3088 struct ceph_osd_linger_request *lreq; 3089 u64 linger_id = greq->private_data; 3090 3091 WARN_ON(greq->result || !greq->u.newest); 3092 3093 down_write(&osdc->lock); 3094 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 3095 if (!lreq) { 3096 dout("%s linger_id %llu dne\n", __func__, linger_id); 3097 goto out_unlock; 3098 } 3099 3100 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 3101 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3102 greq->u.newest); 3103 if (!lreq->map_dne_bound) 3104 lreq->map_dne_bound = greq->u.newest; 3105 erase_linger_mc(&osdc->linger_map_checks, lreq); 3106 check_linger_pool_dne(lreq); 3107 3108 linger_put(lreq); 3109 out_unlock: 3110 up_write(&osdc->lock); 3111 } 3112 3113 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 3114 { 3115 struct ceph_osd_client *osdc = lreq->osdc; 3116 struct ceph_osd_linger_request *lookup_lreq; 3117 int ret; 3118 3119 verify_osdc_wrlocked(osdc); 3120 3121 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3122 lreq->linger_id); 3123 if (lookup_lreq) { 3124 WARN_ON(lookup_lreq != lreq); 3125 return; 3126 } 3127 3128 linger_get(lreq); 3129 insert_linger_mc(&osdc->linger_map_checks, lreq); 3130 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 3131 linger_map_check_cb, lreq->linger_id); 3132 WARN_ON(ret); 3133 } 3134 3135 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 3136 { 3137 int ret; 3138 3139 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3140 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 3141 return ret ?: lreq->reg_commit_error; 3142 } 3143 3144 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 3145 { 3146 int ret; 3147 3148 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3149 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 3150 return ret ?: lreq->notify_finish_error; 3151 } 3152 3153 /* 3154 * Timeout callback, called every N seconds. When 1 or more OSD 3155 * requests has been active for more than N seconds, we send a keepalive 3156 * (tag + timestamp) to its OSD to ensure any communications channel 3157 * reset is detected. 3158 */ 3159 static void handle_timeout(struct work_struct *work) 3160 { 3161 struct ceph_osd_client *osdc = 3162 container_of(work, struct ceph_osd_client, timeout_work.work); 3163 struct ceph_options *opts = osdc->client->options; 3164 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 3165 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout; 3166 LIST_HEAD(slow_osds); 3167 struct rb_node *n, *p; 3168 3169 dout("%s osdc %p\n", __func__, osdc); 3170 down_write(&osdc->lock); 3171 3172 /* 3173 * ping osds that are a bit slow. this ensures that if there 3174 * is a break in the TCP connection we will notice, and reopen 3175 * a connection with that osd (from the fault callback). 3176 */ 3177 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3178 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3179 bool found = false; 3180 3181 for (p = rb_first(&osd->o_requests); p; ) { 3182 struct ceph_osd_request *req = 3183 rb_entry(p, struct ceph_osd_request, r_node); 3184 3185 p = rb_next(p); /* abort_request() */ 3186 3187 if (time_before(req->r_stamp, cutoff)) { 3188 dout(" req %p tid %llu on osd%d is laggy\n", 3189 req, req->r_tid, osd->o_osd); 3190 found = true; 3191 } 3192 if (opts->osd_request_timeout && 3193 time_before(req->r_start_stamp, expiry_cutoff)) { 3194 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3195 req->r_tid, osd->o_osd); 3196 abort_request(req, -ETIMEDOUT); 3197 } 3198 } 3199 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 3200 struct ceph_osd_linger_request *lreq = 3201 rb_entry(p, struct ceph_osd_linger_request, node); 3202 3203 dout(" lreq %p linger_id %llu is served by osd%d\n", 3204 lreq, lreq->linger_id, osd->o_osd); 3205 found = true; 3206 3207 mutex_lock(&lreq->lock); 3208 if (lreq->is_watch && lreq->committed && !lreq->last_error) 3209 send_linger_ping(lreq); 3210 mutex_unlock(&lreq->lock); 3211 } 3212 3213 if (found) 3214 list_move_tail(&osd->o_keepalive_item, &slow_osds); 3215 } 3216 3217 if (opts->osd_request_timeout) { 3218 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 3219 struct ceph_osd_request *req = 3220 rb_entry(p, struct ceph_osd_request, r_node); 3221 3222 p = rb_next(p); /* abort_request() */ 3223 3224 if (time_before(req->r_start_stamp, expiry_cutoff)) { 3225 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3226 req->r_tid, osdc->homeless_osd.o_osd); 3227 abort_request(req, -ETIMEDOUT); 3228 } 3229 } 3230 } 3231 3232 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 3233 maybe_request_map(osdc); 3234 3235 while (!list_empty(&slow_osds)) { 3236 struct ceph_osd *osd = list_first_entry(&slow_osds, 3237 struct ceph_osd, 3238 o_keepalive_item); 3239 list_del_init(&osd->o_keepalive_item); 3240 ceph_con_keepalive(&osd->o_con); 3241 } 3242 3243 up_write(&osdc->lock); 3244 schedule_delayed_work(&osdc->timeout_work, 3245 osdc->client->options->osd_keepalive_timeout); 3246 } 3247 3248 static void handle_osds_timeout(struct work_struct *work) 3249 { 3250 struct ceph_osd_client *osdc = 3251 container_of(work, struct ceph_osd_client, 3252 osds_timeout_work.work); 3253 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 3254 struct ceph_osd *osd, *nosd; 3255 3256 dout("%s osdc %p\n", __func__, osdc); 3257 down_write(&osdc->lock); 3258 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 3259 if (time_before(jiffies, osd->lru_ttl)) 3260 break; 3261 3262 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 3263 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 3264 close_osd(osd); 3265 } 3266 3267 up_write(&osdc->lock); 3268 schedule_delayed_work(&osdc->osds_timeout_work, 3269 round_jiffies_relative(delay)); 3270 } 3271 3272 static int ceph_oloc_decode(void **p, void *end, 3273 struct ceph_object_locator *oloc) 3274 { 3275 u8 struct_v, struct_cv; 3276 u32 len; 3277 void *struct_end; 3278 int ret = 0; 3279 3280 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3281 struct_v = ceph_decode_8(p); 3282 struct_cv = ceph_decode_8(p); 3283 if (struct_v < 3) { 3284 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 3285 struct_v, struct_cv); 3286 goto e_inval; 3287 } 3288 if (struct_cv > 6) { 3289 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 3290 struct_v, struct_cv); 3291 goto e_inval; 3292 } 3293 len = ceph_decode_32(p); 3294 ceph_decode_need(p, end, len, e_inval); 3295 struct_end = *p + len; 3296 3297 oloc->pool = ceph_decode_64(p); 3298 *p += 4; /* skip preferred */ 3299 3300 len = ceph_decode_32(p); 3301 if (len > 0) { 3302 pr_warn("ceph_object_locator::key is set\n"); 3303 goto e_inval; 3304 } 3305 3306 if (struct_v >= 5) { 3307 bool changed = false; 3308 3309 len = ceph_decode_32(p); 3310 if (len > 0) { 3311 ceph_decode_need(p, end, len, e_inval); 3312 if (!oloc->pool_ns || 3313 ceph_compare_string(oloc->pool_ns, *p, len)) 3314 changed = true; 3315 *p += len; 3316 } else { 3317 if (oloc->pool_ns) 3318 changed = true; 3319 } 3320 if (changed) { 3321 /* redirect changes namespace */ 3322 pr_warn("ceph_object_locator::nspace is changed\n"); 3323 goto e_inval; 3324 } 3325 } 3326 3327 if (struct_v >= 6) { 3328 s64 hash = ceph_decode_64(p); 3329 if (hash != -1) { 3330 pr_warn("ceph_object_locator::hash is set\n"); 3331 goto e_inval; 3332 } 3333 } 3334 3335 /* skip the rest */ 3336 *p = struct_end; 3337 out: 3338 return ret; 3339 3340 e_inval: 3341 ret = -EINVAL; 3342 goto out; 3343 } 3344 3345 static int ceph_redirect_decode(void **p, void *end, 3346 struct ceph_request_redirect *redir) 3347 { 3348 u8 struct_v, struct_cv; 3349 u32 len; 3350 void *struct_end; 3351 int ret; 3352 3353 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3354 struct_v = ceph_decode_8(p); 3355 struct_cv = ceph_decode_8(p); 3356 if (struct_cv > 1) { 3357 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 3358 struct_v, struct_cv); 3359 goto e_inval; 3360 } 3361 len = ceph_decode_32(p); 3362 ceph_decode_need(p, end, len, e_inval); 3363 struct_end = *p + len; 3364 3365 ret = ceph_oloc_decode(p, end, &redir->oloc); 3366 if (ret) 3367 goto out; 3368 3369 len = ceph_decode_32(p); 3370 if (len > 0) { 3371 pr_warn("ceph_request_redirect::object_name is set\n"); 3372 goto e_inval; 3373 } 3374 3375 len = ceph_decode_32(p); 3376 *p += len; /* skip osd_instructions */ 3377 3378 /* skip the rest */ 3379 *p = struct_end; 3380 out: 3381 return ret; 3382 3383 e_inval: 3384 ret = -EINVAL; 3385 goto out; 3386 } 3387 3388 struct MOSDOpReply { 3389 struct ceph_pg pgid; 3390 u64 flags; 3391 int result; 3392 u32 epoch; 3393 int num_ops; 3394 u32 outdata_len[CEPH_OSD_MAX_OPS]; 3395 s32 rval[CEPH_OSD_MAX_OPS]; 3396 int retry_attempt; 3397 struct ceph_eversion replay_version; 3398 u64 user_version; 3399 struct ceph_request_redirect redirect; 3400 }; 3401 3402 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 3403 { 3404 void *p = msg->front.iov_base; 3405 void *const end = p + msg->front.iov_len; 3406 u16 version = le16_to_cpu(msg->hdr.version); 3407 struct ceph_eversion bad_replay_version; 3408 u8 decode_redir; 3409 u32 len; 3410 int ret; 3411 int i; 3412 3413 ceph_decode_32_safe(&p, end, len, e_inval); 3414 ceph_decode_need(&p, end, len, e_inval); 3415 p += len; /* skip oid */ 3416 3417 ret = ceph_decode_pgid(&p, end, &m->pgid); 3418 if (ret) 3419 return ret; 3420 3421 ceph_decode_64_safe(&p, end, m->flags, e_inval); 3422 ceph_decode_32_safe(&p, end, m->result, e_inval); 3423 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 3424 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 3425 p += sizeof(bad_replay_version); 3426 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 3427 3428 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 3429 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 3430 goto e_inval; 3431 3432 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 3433 e_inval); 3434 for (i = 0; i < m->num_ops; i++) { 3435 struct ceph_osd_op *op = p; 3436 3437 m->outdata_len[i] = le32_to_cpu(op->payload_len); 3438 p += sizeof(*op); 3439 } 3440 3441 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 3442 for (i = 0; i < m->num_ops; i++) 3443 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 3444 3445 if (version >= 5) { 3446 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 3447 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 3448 p += sizeof(m->replay_version); 3449 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 3450 } else { 3451 m->replay_version = bad_replay_version; /* struct */ 3452 m->user_version = le64_to_cpu(m->replay_version.version); 3453 } 3454 3455 if (version >= 6) { 3456 if (version >= 7) 3457 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 3458 else 3459 decode_redir = 1; 3460 } else { 3461 decode_redir = 0; 3462 } 3463 3464 if (decode_redir) { 3465 ret = ceph_redirect_decode(&p, end, &m->redirect); 3466 if (ret) 3467 return ret; 3468 } else { 3469 ceph_oloc_init(&m->redirect.oloc); 3470 } 3471 3472 return 0; 3473 3474 e_inval: 3475 return -EINVAL; 3476 } 3477 3478 /* 3479 * Handle MOSDOpReply. Set ->r_result and call the callback if it is 3480 * specified. 3481 */ 3482 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 3483 { 3484 struct ceph_osd_client *osdc = osd->o_osdc; 3485 struct ceph_osd_request *req; 3486 struct MOSDOpReply m; 3487 u64 tid = le64_to_cpu(msg->hdr.tid); 3488 u32 data_len = 0; 3489 int ret; 3490 int i; 3491 3492 dout("%s msg %p tid %llu\n", __func__, msg, tid); 3493 3494 down_read(&osdc->lock); 3495 if (!osd_registered(osd)) { 3496 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3497 goto out_unlock_osdc; 3498 } 3499 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 3500 3501 mutex_lock(&osd->lock); 3502 req = lookup_request(&osd->o_requests, tid); 3503 if (!req) { 3504 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 3505 goto out_unlock_session; 3506 } 3507 3508 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 3509 ret = decode_MOSDOpReply(msg, &m); 3510 m.redirect.oloc.pool_ns = NULL; 3511 if (ret) { 3512 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 3513 req->r_tid, ret); 3514 ceph_msg_dump(msg); 3515 goto fail_request; 3516 } 3517 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 3518 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 3519 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 3520 le64_to_cpu(m.replay_version.version), m.user_version); 3521 3522 if (m.retry_attempt >= 0) { 3523 if (m.retry_attempt != req->r_attempts - 1) { 3524 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 3525 req, req->r_tid, m.retry_attempt, 3526 req->r_attempts - 1); 3527 goto out_unlock_session; 3528 } 3529 } else { 3530 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 3531 } 3532 3533 if (!ceph_oloc_empty(&m.redirect.oloc)) { 3534 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 3535 m.redirect.oloc.pool); 3536 unlink_request(osd, req); 3537 mutex_unlock(&osd->lock); 3538 3539 /* 3540 * Not ceph_oloc_copy() - changing pool_ns is not 3541 * supported. 3542 */ 3543 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 3544 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED; 3545 req->r_tid = 0; 3546 __submit_request(req, false); 3547 goto out_unlock_osdc; 3548 } 3549 3550 if (m.num_ops != req->r_num_ops) { 3551 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 3552 req->r_num_ops, req->r_tid); 3553 goto fail_request; 3554 } 3555 for (i = 0; i < req->r_num_ops; i++) { 3556 dout(" req %p tid %llu op %d rval %d len %u\n", req, 3557 req->r_tid, i, m.rval[i], m.outdata_len[i]); 3558 req->r_ops[i].rval = m.rval[i]; 3559 req->r_ops[i].outdata_len = m.outdata_len[i]; 3560 data_len += m.outdata_len[i]; 3561 } 3562 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 3563 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 3564 le32_to_cpu(msg->hdr.data_len), req->r_tid); 3565 goto fail_request; 3566 } 3567 dout("%s req %p tid %llu result %d data_len %u\n", __func__, 3568 req, req->r_tid, m.result, data_len); 3569 3570 /* 3571 * Since we only ever request ONDISK, we should only ever get 3572 * one (type of) reply back. 3573 */ 3574 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK)); 3575 req->r_result = m.result ?: data_len; 3576 finish_request(req); 3577 mutex_unlock(&osd->lock); 3578 up_read(&osdc->lock); 3579 3580 __complete_request(req); 3581 return; 3582 3583 fail_request: 3584 complete_request(req, -EIO); 3585 out_unlock_session: 3586 mutex_unlock(&osd->lock); 3587 out_unlock_osdc: 3588 up_read(&osdc->lock); 3589 } 3590 3591 static void set_pool_was_full(struct ceph_osd_client *osdc) 3592 { 3593 struct rb_node *n; 3594 3595 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 3596 struct ceph_pg_pool_info *pi = 3597 rb_entry(n, struct ceph_pg_pool_info, node); 3598 3599 pi->was_full = __pool_full(pi); 3600 } 3601 } 3602 3603 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 3604 { 3605 struct ceph_pg_pool_info *pi; 3606 3607 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 3608 if (!pi) 3609 return false; 3610 3611 return pi->was_full && !__pool_full(pi); 3612 } 3613 3614 static enum calc_target_result 3615 recalc_linger_target(struct ceph_osd_linger_request *lreq) 3616 { 3617 struct ceph_osd_client *osdc = lreq->osdc; 3618 enum calc_target_result ct_res; 3619 3620 ct_res = calc_target(osdc, &lreq->t, NULL, true); 3621 if (ct_res == CALC_TARGET_NEED_RESEND) { 3622 struct ceph_osd *osd; 3623 3624 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3625 if (osd != lreq->osd) { 3626 unlink_linger(lreq->osd, lreq); 3627 link_linger(osd, lreq); 3628 } 3629 } 3630 3631 return ct_res; 3632 } 3633 3634 /* 3635 * Requeue requests whose mapping to an OSD has changed. 3636 */ 3637 static void scan_requests(struct ceph_osd *osd, 3638 bool force_resend, 3639 bool cleared_full, 3640 bool check_pool_cleared_full, 3641 struct rb_root *need_resend, 3642 struct list_head *need_resend_linger) 3643 { 3644 struct ceph_osd_client *osdc = osd->o_osdc; 3645 struct rb_node *n; 3646 bool force_resend_writes; 3647 3648 for (n = rb_first(&osd->o_linger_requests); n; ) { 3649 struct ceph_osd_linger_request *lreq = 3650 rb_entry(n, struct ceph_osd_linger_request, node); 3651 enum calc_target_result ct_res; 3652 3653 n = rb_next(n); /* recalc_linger_target() */ 3654 3655 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 3656 lreq->linger_id); 3657 ct_res = recalc_linger_target(lreq); 3658 switch (ct_res) { 3659 case CALC_TARGET_NO_ACTION: 3660 force_resend_writes = cleared_full || 3661 (check_pool_cleared_full && 3662 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 3663 if (!force_resend && !force_resend_writes) 3664 break; 3665 3666 /* fall through */ 3667 case CALC_TARGET_NEED_RESEND: 3668 cancel_linger_map_check(lreq); 3669 /* 3670 * scan_requests() for the previous epoch(s) 3671 * may have already added it to the list, since 3672 * it's not unlinked here. 3673 */ 3674 if (list_empty(&lreq->scan_item)) 3675 list_add_tail(&lreq->scan_item, need_resend_linger); 3676 break; 3677 case CALC_TARGET_POOL_DNE: 3678 list_del_init(&lreq->scan_item); 3679 check_linger_pool_dne(lreq); 3680 break; 3681 } 3682 } 3683 3684 for (n = rb_first(&osd->o_requests); n; ) { 3685 struct ceph_osd_request *req = 3686 rb_entry(n, struct ceph_osd_request, r_node); 3687 enum calc_target_result ct_res; 3688 3689 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3690 3691 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3692 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con, 3693 false); 3694 switch (ct_res) { 3695 case CALC_TARGET_NO_ACTION: 3696 force_resend_writes = cleared_full || 3697 (check_pool_cleared_full && 3698 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3699 if (!force_resend && 3700 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3701 !force_resend_writes)) 3702 break; 3703 3704 /* fall through */ 3705 case CALC_TARGET_NEED_RESEND: 3706 cancel_map_check(req); 3707 unlink_request(osd, req); 3708 insert_request(need_resend, req); 3709 break; 3710 case CALC_TARGET_POOL_DNE: 3711 check_pool_dne(req); 3712 break; 3713 } 3714 } 3715 } 3716 3717 static int handle_one_map(struct ceph_osd_client *osdc, 3718 void *p, void *end, bool incremental, 3719 struct rb_root *need_resend, 3720 struct list_head *need_resend_linger) 3721 { 3722 struct ceph_osdmap *newmap; 3723 struct rb_node *n; 3724 bool skipped_map = false; 3725 bool was_full; 3726 3727 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3728 set_pool_was_full(osdc); 3729 3730 if (incremental) 3731 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3732 else 3733 newmap = ceph_osdmap_decode(&p, end); 3734 if (IS_ERR(newmap)) 3735 return PTR_ERR(newmap); 3736 3737 if (newmap != osdc->osdmap) { 3738 /* 3739 * Preserve ->was_full before destroying the old map. 3740 * For pools that weren't in the old map, ->was_full 3741 * should be false. 3742 */ 3743 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3744 struct ceph_pg_pool_info *pi = 3745 rb_entry(n, struct ceph_pg_pool_info, node); 3746 struct ceph_pg_pool_info *old_pi; 3747 3748 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3749 if (old_pi) 3750 pi->was_full = old_pi->was_full; 3751 else 3752 WARN_ON(pi->was_full); 3753 } 3754 3755 if (osdc->osdmap->epoch && 3756 osdc->osdmap->epoch + 1 < newmap->epoch) { 3757 WARN_ON(incremental); 3758 skipped_map = true; 3759 } 3760 3761 ceph_osdmap_destroy(osdc->osdmap); 3762 osdc->osdmap = newmap; 3763 } 3764 3765 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3766 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3767 need_resend, need_resend_linger); 3768 3769 for (n = rb_first(&osdc->osds); n; ) { 3770 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3771 3772 n = rb_next(n); /* close_osd() */ 3773 3774 scan_requests(osd, skipped_map, was_full, true, need_resend, 3775 need_resend_linger); 3776 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3777 memcmp(&osd->o_con.peer_addr, 3778 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3779 sizeof(struct ceph_entity_addr))) 3780 close_osd(osd); 3781 } 3782 3783 return 0; 3784 } 3785 3786 static void kick_requests(struct ceph_osd_client *osdc, 3787 struct rb_root *need_resend, 3788 struct list_head *need_resend_linger) 3789 { 3790 struct ceph_osd_linger_request *lreq, *nlreq; 3791 enum calc_target_result ct_res; 3792 struct rb_node *n; 3793 3794 /* make sure need_resend targets reflect latest map */ 3795 for (n = rb_first(need_resend); n; ) { 3796 struct ceph_osd_request *req = 3797 rb_entry(n, struct ceph_osd_request, r_node); 3798 3799 n = rb_next(n); 3800 3801 if (req->r_t.epoch < osdc->osdmap->epoch) { 3802 ct_res = calc_target(osdc, &req->r_t, NULL, false); 3803 if (ct_res == CALC_TARGET_POOL_DNE) { 3804 erase_request(need_resend, req); 3805 check_pool_dne(req); 3806 } 3807 } 3808 } 3809 3810 for (n = rb_first(need_resend); n; ) { 3811 struct ceph_osd_request *req = 3812 rb_entry(n, struct ceph_osd_request, r_node); 3813 struct ceph_osd *osd; 3814 3815 n = rb_next(n); 3816 erase_request(need_resend, req); /* before link_request() */ 3817 3818 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3819 link_request(osd, req); 3820 if (!req->r_linger) { 3821 if (!osd_homeless(osd) && !req->r_t.paused) 3822 send_request(req); 3823 } else { 3824 cancel_linger_request(req); 3825 } 3826 } 3827 3828 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3829 if (!osd_homeless(lreq->osd)) 3830 send_linger(lreq); 3831 3832 list_del_init(&lreq->scan_item); 3833 } 3834 } 3835 3836 /* 3837 * Process updated osd map. 3838 * 3839 * The message contains any number of incremental and full maps, normally 3840 * indicating some sort of topology change in the cluster. Kick requests 3841 * off to different OSDs as needed. 3842 */ 3843 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3844 { 3845 void *p = msg->front.iov_base; 3846 void *const end = p + msg->front.iov_len; 3847 u32 nr_maps, maplen; 3848 u32 epoch; 3849 struct ceph_fsid fsid; 3850 struct rb_root need_resend = RB_ROOT; 3851 LIST_HEAD(need_resend_linger); 3852 bool handled_incremental = false; 3853 bool was_pauserd, was_pausewr; 3854 bool pauserd, pausewr; 3855 int err; 3856 3857 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3858 down_write(&osdc->lock); 3859 3860 /* verify fsid */ 3861 ceph_decode_need(&p, end, sizeof(fsid), bad); 3862 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3863 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3864 goto bad; 3865 3866 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3867 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3868 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3869 have_pool_full(osdc); 3870 3871 /* incremental maps */ 3872 ceph_decode_32_safe(&p, end, nr_maps, bad); 3873 dout(" %d inc maps\n", nr_maps); 3874 while (nr_maps > 0) { 3875 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3876 epoch = ceph_decode_32(&p); 3877 maplen = ceph_decode_32(&p); 3878 ceph_decode_need(&p, end, maplen, bad); 3879 if (osdc->osdmap->epoch && 3880 osdc->osdmap->epoch + 1 == epoch) { 3881 dout("applying incremental map %u len %d\n", 3882 epoch, maplen); 3883 err = handle_one_map(osdc, p, p + maplen, true, 3884 &need_resend, &need_resend_linger); 3885 if (err) 3886 goto bad; 3887 handled_incremental = true; 3888 } else { 3889 dout("ignoring incremental map %u len %d\n", 3890 epoch, maplen); 3891 } 3892 p += maplen; 3893 nr_maps--; 3894 } 3895 if (handled_incremental) 3896 goto done; 3897 3898 /* full maps */ 3899 ceph_decode_32_safe(&p, end, nr_maps, bad); 3900 dout(" %d full maps\n", nr_maps); 3901 while (nr_maps) { 3902 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3903 epoch = ceph_decode_32(&p); 3904 maplen = ceph_decode_32(&p); 3905 ceph_decode_need(&p, end, maplen, bad); 3906 if (nr_maps > 1) { 3907 dout("skipping non-latest full map %u len %d\n", 3908 epoch, maplen); 3909 } else if (osdc->osdmap->epoch >= epoch) { 3910 dout("skipping full map %u len %d, " 3911 "older than our %u\n", epoch, maplen, 3912 osdc->osdmap->epoch); 3913 } else { 3914 dout("taking full map %u len %d\n", epoch, maplen); 3915 err = handle_one_map(osdc, p, p + maplen, false, 3916 &need_resend, &need_resend_linger); 3917 if (err) 3918 goto bad; 3919 } 3920 p += maplen; 3921 nr_maps--; 3922 } 3923 3924 done: 3925 /* 3926 * subscribe to subsequent osdmap updates if full to ensure 3927 * we find out when we are no longer full and stop returning 3928 * ENOSPC. 3929 */ 3930 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3931 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3932 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3933 have_pool_full(osdc); 3934 if (was_pauserd || was_pausewr || pauserd || pausewr || 3935 osdc->osdmap->epoch < osdc->epoch_barrier) 3936 maybe_request_map(osdc); 3937 3938 kick_requests(osdc, &need_resend, &need_resend_linger); 3939 3940 ceph_osdc_abort_on_full(osdc); 3941 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 3942 osdc->osdmap->epoch); 3943 up_write(&osdc->lock); 3944 wake_up_all(&osdc->client->auth_wq); 3945 return; 3946 3947 bad: 3948 pr_err("osdc handle_map corrupt msg\n"); 3949 ceph_msg_dump(msg); 3950 up_write(&osdc->lock); 3951 } 3952 3953 /* 3954 * Resubmit requests pending on the given osd. 3955 */ 3956 static void kick_osd_requests(struct ceph_osd *osd) 3957 { 3958 struct rb_node *n; 3959 3960 clear_backoffs(osd); 3961 3962 for (n = rb_first(&osd->o_requests); n; ) { 3963 struct ceph_osd_request *req = 3964 rb_entry(n, struct ceph_osd_request, r_node); 3965 3966 n = rb_next(n); /* cancel_linger_request() */ 3967 3968 if (!req->r_linger) { 3969 if (!req->r_t.paused) 3970 send_request(req); 3971 } else { 3972 cancel_linger_request(req); 3973 } 3974 } 3975 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 3976 struct ceph_osd_linger_request *lreq = 3977 rb_entry(n, struct ceph_osd_linger_request, node); 3978 3979 send_linger(lreq); 3980 } 3981 } 3982 3983 /* 3984 * If the osd connection drops, we need to resubmit all requests. 3985 */ 3986 static void osd_fault(struct ceph_connection *con) 3987 { 3988 struct ceph_osd *osd = con->private; 3989 struct ceph_osd_client *osdc = osd->o_osdc; 3990 3991 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 3992 3993 down_write(&osdc->lock); 3994 if (!osd_registered(osd)) { 3995 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3996 goto out_unlock; 3997 } 3998 3999 if (!reopen_osd(osd)) 4000 kick_osd_requests(osd); 4001 maybe_request_map(osdc); 4002 4003 out_unlock: 4004 up_write(&osdc->lock); 4005 } 4006 4007 struct MOSDBackoff { 4008 struct ceph_spg spgid; 4009 u32 map_epoch; 4010 u8 op; 4011 u64 id; 4012 struct ceph_hobject_id *begin; 4013 struct ceph_hobject_id *end; 4014 }; 4015 4016 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m) 4017 { 4018 void *p = msg->front.iov_base; 4019 void *const end = p + msg->front.iov_len; 4020 u8 struct_v; 4021 u32 struct_len; 4022 int ret; 4023 4024 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len); 4025 if (ret) 4026 return ret; 4027 4028 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid); 4029 if (ret) 4030 return ret; 4031 4032 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval); 4033 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval); 4034 ceph_decode_8_safe(&p, end, m->op, e_inval); 4035 ceph_decode_64_safe(&p, end, m->id, e_inval); 4036 4037 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO); 4038 if (!m->begin) 4039 return -ENOMEM; 4040 4041 ret = decode_hoid(&p, end, m->begin); 4042 if (ret) { 4043 free_hoid(m->begin); 4044 return ret; 4045 } 4046 4047 m->end = kzalloc(sizeof(*m->end), GFP_NOIO); 4048 if (!m->end) { 4049 free_hoid(m->begin); 4050 return -ENOMEM; 4051 } 4052 4053 ret = decode_hoid(&p, end, m->end); 4054 if (ret) { 4055 free_hoid(m->begin); 4056 free_hoid(m->end); 4057 return ret; 4058 } 4059 4060 return 0; 4061 4062 e_inval: 4063 return -EINVAL; 4064 } 4065 4066 static struct ceph_msg *create_backoff_message( 4067 const struct ceph_osd_backoff *backoff, 4068 u32 map_epoch) 4069 { 4070 struct ceph_msg *msg; 4071 void *p, *end; 4072 int msg_size; 4073 4074 msg_size = CEPH_ENCODING_START_BLK_LEN + 4075 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 4076 msg_size += 4 + 1 + 8; /* map_epoch, op, id */ 4077 msg_size += CEPH_ENCODING_START_BLK_LEN + 4078 hoid_encoding_size(backoff->begin); 4079 msg_size += CEPH_ENCODING_START_BLK_LEN + 4080 hoid_encoding_size(backoff->end); 4081 4082 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true); 4083 if (!msg) 4084 return NULL; 4085 4086 p = msg->front.iov_base; 4087 end = p + msg->front_alloc_len; 4088 4089 encode_spgid(&p, &backoff->spgid); 4090 ceph_encode_32(&p, map_epoch); 4091 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK); 4092 ceph_encode_64(&p, backoff->id); 4093 encode_hoid(&p, end, backoff->begin); 4094 encode_hoid(&p, end, backoff->end); 4095 BUG_ON(p != end); 4096 4097 msg->front.iov_len = p - msg->front.iov_base; 4098 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */ 4099 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 4100 4101 return msg; 4102 } 4103 4104 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m) 4105 { 4106 struct ceph_spg_mapping *spg; 4107 struct ceph_osd_backoff *backoff; 4108 struct ceph_msg *msg; 4109 4110 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4111 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4112 4113 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid); 4114 if (!spg) { 4115 spg = alloc_spg_mapping(); 4116 if (!spg) { 4117 pr_err("%s failed to allocate spg\n", __func__); 4118 return; 4119 } 4120 spg->spgid = m->spgid; /* struct */ 4121 insert_spg_mapping(&osd->o_backoff_mappings, spg); 4122 } 4123 4124 backoff = alloc_backoff(); 4125 if (!backoff) { 4126 pr_err("%s failed to allocate backoff\n", __func__); 4127 return; 4128 } 4129 backoff->spgid = m->spgid; /* struct */ 4130 backoff->id = m->id; 4131 backoff->begin = m->begin; 4132 m->begin = NULL; /* backoff now owns this */ 4133 backoff->end = m->end; 4134 m->end = NULL; /* ditto */ 4135 4136 insert_backoff(&spg->backoffs, backoff); 4137 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4138 4139 /* 4140 * Ack with original backoff's epoch so that the OSD can 4141 * discard this if there was a PG split. 4142 */ 4143 msg = create_backoff_message(backoff, m->map_epoch); 4144 if (!msg) { 4145 pr_err("%s failed to allocate msg\n", __func__); 4146 return; 4147 } 4148 ceph_con_send(&osd->o_con, msg); 4149 } 4150 4151 static bool target_contained_by(const struct ceph_osd_request_target *t, 4152 const struct ceph_hobject_id *begin, 4153 const struct ceph_hobject_id *end) 4154 { 4155 struct ceph_hobject_id hoid; 4156 int cmp; 4157 4158 hoid_fill_from_target(&hoid, t); 4159 cmp = hoid_compare(&hoid, begin); 4160 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0); 4161 } 4162 4163 static void handle_backoff_unblock(struct ceph_osd *osd, 4164 const struct MOSDBackoff *m) 4165 { 4166 struct ceph_spg_mapping *spg; 4167 struct ceph_osd_backoff *backoff; 4168 struct rb_node *n; 4169 4170 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4171 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4172 4173 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id); 4174 if (!backoff) { 4175 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n", 4176 __func__, osd->o_osd, m->spgid.pgid.pool, 4177 m->spgid.pgid.seed, m->spgid.shard, m->id); 4178 return; 4179 } 4180 4181 if (hoid_compare(backoff->begin, m->begin) && 4182 hoid_compare(backoff->end, m->end)) { 4183 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n", 4184 __func__, osd->o_osd, m->spgid.pgid.pool, 4185 m->spgid.pgid.seed, m->spgid.shard, m->id); 4186 /* unblock it anyway... */ 4187 } 4188 4189 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid); 4190 BUG_ON(!spg); 4191 4192 erase_backoff(&spg->backoffs, backoff); 4193 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4194 free_backoff(backoff); 4195 4196 if (RB_EMPTY_ROOT(&spg->backoffs)) { 4197 erase_spg_mapping(&osd->o_backoff_mappings, spg); 4198 free_spg_mapping(spg); 4199 } 4200 4201 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 4202 struct ceph_osd_request *req = 4203 rb_entry(n, struct ceph_osd_request, r_node); 4204 4205 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) { 4206 /* 4207 * Match against @m, not @backoff -- the PG may 4208 * have split on the OSD. 4209 */ 4210 if (target_contained_by(&req->r_t, m->begin, m->end)) { 4211 /* 4212 * If no other installed backoff applies, 4213 * resend. 4214 */ 4215 send_request(req); 4216 } 4217 } 4218 } 4219 } 4220 4221 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg) 4222 { 4223 struct ceph_osd_client *osdc = osd->o_osdc; 4224 struct MOSDBackoff m; 4225 int ret; 4226 4227 down_read(&osdc->lock); 4228 if (!osd_registered(osd)) { 4229 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4230 up_read(&osdc->lock); 4231 return; 4232 } 4233 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 4234 4235 mutex_lock(&osd->lock); 4236 ret = decode_MOSDBackoff(msg, &m); 4237 if (ret) { 4238 pr_err("failed to decode MOSDBackoff: %d\n", ret); 4239 ceph_msg_dump(msg); 4240 goto out_unlock; 4241 } 4242 4243 switch (m.op) { 4244 case CEPH_OSD_BACKOFF_OP_BLOCK: 4245 handle_backoff_block(osd, &m); 4246 break; 4247 case CEPH_OSD_BACKOFF_OP_UNBLOCK: 4248 handle_backoff_unblock(osd, &m); 4249 break; 4250 default: 4251 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op); 4252 } 4253 4254 free_hoid(m.begin); 4255 free_hoid(m.end); 4256 4257 out_unlock: 4258 mutex_unlock(&osd->lock); 4259 up_read(&osdc->lock); 4260 } 4261 4262 /* 4263 * Process osd watch notifications 4264 */ 4265 static void handle_watch_notify(struct ceph_osd_client *osdc, 4266 struct ceph_msg *msg) 4267 { 4268 void *p = msg->front.iov_base; 4269 void *const end = p + msg->front.iov_len; 4270 struct ceph_osd_linger_request *lreq; 4271 struct linger_work *lwork; 4272 u8 proto_ver, opcode; 4273 u64 cookie, notify_id; 4274 u64 notifier_id = 0; 4275 s32 return_code = 0; 4276 void *payload = NULL; 4277 u32 payload_len = 0; 4278 4279 ceph_decode_8_safe(&p, end, proto_ver, bad); 4280 ceph_decode_8_safe(&p, end, opcode, bad); 4281 ceph_decode_64_safe(&p, end, cookie, bad); 4282 p += 8; /* skip ver */ 4283 ceph_decode_64_safe(&p, end, notify_id, bad); 4284 4285 if (proto_ver >= 1) { 4286 ceph_decode_32_safe(&p, end, payload_len, bad); 4287 ceph_decode_need(&p, end, payload_len, bad); 4288 payload = p; 4289 p += payload_len; 4290 } 4291 4292 if (le16_to_cpu(msg->hdr.version) >= 2) 4293 ceph_decode_32_safe(&p, end, return_code, bad); 4294 4295 if (le16_to_cpu(msg->hdr.version) >= 3) 4296 ceph_decode_64_safe(&p, end, notifier_id, bad); 4297 4298 down_read(&osdc->lock); 4299 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 4300 if (!lreq) { 4301 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 4302 cookie); 4303 goto out_unlock_osdc; 4304 } 4305 4306 mutex_lock(&lreq->lock); 4307 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 4308 opcode, cookie, lreq, lreq->is_watch); 4309 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 4310 if (!lreq->last_error) { 4311 lreq->last_error = -ENOTCONN; 4312 queue_watch_error(lreq); 4313 } 4314 } else if (!lreq->is_watch) { 4315 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 4316 if (lreq->notify_id && lreq->notify_id != notify_id) { 4317 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 4318 lreq->notify_id, notify_id); 4319 } else if (!completion_done(&lreq->notify_finish_wait)) { 4320 struct ceph_msg_data *data = 4321 list_first_entry_or_null(&msg->data, 4322 struct ceph_msg_data, 4323 links); 4324 4325 if (data) { 4326 if (lreq->preply_pages) { 4327 WARN_ON(data->type != 4328 CEPH_MSG_DATA_PAGES); 4329 *lreq->preply_pages = data->pages; 4330 *lreq->preply_len = data->length; 4331 } else { 4332 ceph_release_page_vector(data->pages, 4333 calc_pages_for(0, data->length)); 4334 } 4335 } 4336 lreq->notify_finish_error = return_code; 4337 complete_all(&lreq->notify_finish_wait); 4338 } 4339 } else { 4340 /* CEPH_WATCH_EVENT_NOTIFY */ 4341 lwork = lwork_alloc(lreq, do_watch_notify); 4342 if (!lwork) { 4343 pr_err("failed to allocate notify-lwork\n"); 4344 goto out_unlock_lreq; 4345 } 4346 4347 lwork->notify.notify_id = notify_id; 4348 lwork->notify.notifier_id = notifier_id; 4349 lwork->notify.payload = payload; 4350 lwork->notify.payload_len = payload_len; 4351 lwork->notify.msg = ceph_msg_get(msg); 4352 lwork_queue(lwork); 4353 } 4354 4355 out_unlock_lreq: 4356 mutex_unlock(&lreq->lock); 4357 out_unlock_osdc: 4358 up_read(&osdc->lock); 4359 return; 4360 4361 bad: 4362 pr_err("osdc handle_watch_notify corrupt msg\n"); 4363 } 4364 4365 /* 4366 * Register request, send initial attempt. 4367 */ 4368 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 4369 struct ceph_osd_request *req, 4370 bool nofail) 4371 { 4372 down_read(&osdc->lock); 4373 submit_request(req, false); 4374 up_read(&osdc->lock); 4375 4376 return 0; 4377 } 4378 EXPORT_SYMBOL(ceph_osdc_start_request); 4379 4380 /* 4381 * Unregister a registered request. The request is not completed: 4382 * ->r_result isn't set and __complete_request() isn't called. 4383 */ 4384 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 4385 { 4386 struct ceph_osd_client *osdc = req->r_osdc; 4387 4388 down_write(&osdc->lock); 4389 if (req->r_osd) 4390 cancel_request(req); 4391 up_write(&osdc->lock); 4392 } 4393 EXPORT_SYMBOL(ceph_osdc_cancel_request); 4394 4395 /* 4396 * @timeout: in jiffies, 0 means "wait forever" 4397 */ 4398 static int wait_request_timeout(struct ceph_osd_request *req, 4399 unsigned long timeout) 4400 { 4401 long left; 4402 4403 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 4404 left = wait_for_completion_killable_timeout(&req->r_completion, 4405 ceph_timeout_jiffies(timeout)); 4406 if (left <= 0) { 4407 left = left ?: -ETIMEDOUT; 4408 ceph_osdc_cancel_request(req); 4409 } else { 4410 left = req->r_result; /* completed */ 4411 } 4412 4413 return left; 4414 } 4415 4416 /* 4417 * wait for a request to complete 4418 */ 4419 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 4420 struct ceph_osd_request *req) 4421 { 4422 return wait_request_timeout(req, 0); 4423 } 4424 EXPORT_SYMBOL(ceph_osdc_wait_request); 4425 4426 /* 4427 * sync - wait for all in-flight requests to flush. avoid starvation. 4428 */ 4429 void ceph_osdc_sync(struct ceph_osd_client *osdc) 4430 { 4431 struct rb_node *n, *p; 4432 u64 last_tid = atomic64_read(&osdc->last_tid); 4433 4434 again: 4435 down_read(&osdc->lock); 4436 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 4437 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 4438 4439 mutex_lock(&osd->lock); 4440 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 4441 struct ceph_osd_request *req = 4442 rb_entry(p, struct ceph_osd_request, r_node); 4443 4444 if (req->r_tid > last_tid) 4445 break; 4446 4447 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 4448 continue; 4449 4450 ceph_osdc_get_request(req); 4451 mutex_unlock(&osd->lock); 4452 up_read(&osdc->lock); 4453 dout("%s waiting on req %p tid %llu last_tid %llu\n", 4454 __func__, req, req->r_tid, last_tid); 4455 wait_for_completion(&req->r_completion); 4456 ceph_osdc_put_request(req); 4457 goto again; 4458 } 4459 4460 mutex_unlock(&osd->lock); 4461 } 4462 4463 up_read(&osdc->lock); 4464 dout("%s done last_tid %llu\n", __func__, last_tid); 4465 } 4466 EXPORT_SYMBOL(ceph_osdc_sync); 4467 4468 static struct ceph_osd_request * 4469 alloc_linger_request(struct ceph_osd_linger_request *lreq) 4470 { 4471 struct ceph_osd_request *req; 4472 4473 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 4474 if (!req) 4475 return NULL; 4476 4477 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4478 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4479 4480 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 4481 ceph_osdc_put_request(req); 4482 return NULL; 4483 } 4484 4485 return req; 4486 } 4487 4488 /* 4489 * Returns a handle, caller owns a ref. 4490 */ 4491 struct ceph_osd_linger_request * 4492 ceph_osdc_watch(struct ceph_osd_client *osdc, 4493 struct ceph_object_id *oid, 4494 struct ceph_object_locator *oloc, 4495 rados_watchcb2_t wcb, 4496 rados_watcherrcb_t errcb, 4497 void *data) 4498 { 4499 struct ceph_osd_linger_request *lreq; 4500 int ret; 4501 4502 lreq = linger_alloc(osdc); 4503 if (!lreq) 4504 return ERR_PTR(-ENOMEM); 4505 4506 lreq->is_watch = true; 4507 lreq->wcb = wcb; 4508 lreq->errcb = errcb; 4509 lreq->data = data; 4510 lreq->watch_valid_thru = jiffies; 4511 4512 ceph_oid_copy(&lreq->t.base_oid, oid); 4513 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4514 lreq->t.flags = CEPH_OSD_FLAG_WRITE; 4515 ktime_get_real_ts64(&lreq->mtime); 4516 4517 lreq->reg_req = alloc_linger_request(lreq); 4518 if (!lreq->reg_req) { 4519 ret = -ENOMEM; 4520 goto err_put_lreq; 4521 } 4522 4523 lreq->ping_req = alloc_linger_request(lreq); 4524 if (!lreq->ping_req) { 4525 ret = -ENOMEM; 4526 goto err_put_lreq; 4527 } 4528 4529 down_write(&osdc->lock); 4530 linger_register(lreq); /* before osd_req_op_* */ 4531 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id, 4532 CEPH_OSD_WATCH_OP_WATCH); 4533 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id, 4534 CEPH_OSD_WATCH_OP_PING); 4535 linger_submit(lreq); 4536 up_write(&osdc->lock); 4537 4538 ret = linger_reg_commit_wait(lreq); 4539 if (ret) { 4540 linger_cancel(lreq); 4541 goto err_put_lreq; 4542 } 4543 4544 return lreq; 4545 4546 err_put_lreq: 4547 linger_put(lreq); 4548 return ERR_PTR(ret); 4549 } 4550 EXPORT_SYMBOL(ceph_osdc_watch); 4551 4552 /* 4553 * Releases a ref. 4554 * 4555 * Times out after mount_timeout to preserve rbd unmap behaviour 4556 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 4557 * with mount_timeout"). 4558 */ 4559 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 4560 struct ceph_osd_linger_request *lreq) 4561 { 4562 struct ceph_options *opts = osdc->client->options; 4563 struct ceph_osd_request *req; 4564 int ret; 4565 4566 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4567 if (!req) 4568 return -ENOMEM; 4569 4570 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4571 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4572 req->r_flags = CEPH_OSD_FLAG_WRITE; 4573 ktime_get_real_ts64(&req->r_mtime); 4574 osd_req_op_watch_init(req, 0, lreq->linger_id, 4575 CEPH_OSD_WATCH_OP_UNWATCH); 4576 4577 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4578 if (ret) 4579 goto out_put_req; 4580 4581 ceph_osdc_start_request(osdc, req, false); 4582 linger_cancel(lreq); 4583 linger_put(lreq); 4584 ret = wait_request_timeout(req, opts->mount_timeout); 4585 4586 out_put_req: 4587 ceph_osdc_put_request(req); 4588 return ret; 4589 } 4590 EXPORT_SYMBOL(ceph_osdc_unwatch); 4591 4592 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 4593 u64 notify_id, u64 cookie, void *payload, 4594 u32 payload_len) 4595 { 4596 struct ceph_osd_req_op *op; 4597 struct ceph_pagelist *pl; 4598 int ret; 4599 4600 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 4601 4602 pl = kmalloc(sizeof(*pl), GFP_NOIO); 4603 if (!pl) 4604 return -ENOMEM; 4605 4606 ceph_pagelist_init(pl); 4607 ret = ceph_pagelist_encode_64(pl, notify_id); 4608 ret |= ceph_pagelist_encode_64(pl, cookie); 4609 if (payload) { 4610 ret |= ceph_pagelist_encode_32(pl, payload_len); 4611 ret |= ceph_pagelist_append(pl, payload, payload_len); 4612 } else { 4613 ret |= ceph_pagelist_encode_32(pl, 0); 4614 } 4615 if (ret) { 4616 ceph_pagelist_release(pl); 4617 return -ENOMEM; 4618 } 4619 4620 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 4621 op->indata_len = pl->length; 4622 return 0; 4623 } 4624 4625 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 4626 struct ceph_object_id *oid, 4627 struct ceph_object_locator *oloc, 4628 u64 notify_id, 4629 u64 cookie, 4630 void *payload, 4631 u32 payload_len) 4632 { 4633 struct ceph_osd_request *req; 4634 int ret; 4635 4636 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4637 if (!req) 4638 return -ENOMEM; 4639 4640 ceph_oid_copy(&req->r_base_oid, oid); 4641 ceph_oloc_copy(&req->r_base_oloc, oloc); 4642 req->r_flags = CEPH_OSD_FLAG_READ; 4643 4644 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4645 if (ret) 4646 goto out_put_req; 4647 4648 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 4649 payload_len); 4650 if (ret) 4651 goto out_put_req; 4652 4653 ceph_osdc_start_request(osdc, req, false); 4654 ret = ceph_osdc_wait_request(osdc, req); 4655 4656 out_put_req: 4657 ceph_osdc_put_request(req); 4658 return ret; 4659 } 4660 EXPORT_SYMBOL(ceph_osdc_notify_ack); 4661 4662 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 4663 u64 cookie, u32 prot_ver, u32 timeout, 4664 void *payload, u32 payload_len) 4665 { 4666 struct ceph_osd_req_op *op; 4667 struct ceph_pagelist *pl; 4668 int ret; 4669 4670 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 4671 op->notify.cookie = cookie; 4672 4673 pl = kmalloc(sizeof(*pl), GFP_NOIO); 4674 if (!pl) 4675 return -ENOMEM; 4676 4677 ceph_pagelist_init(pl); 4678 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 4679 ret |= ceph_pagelist_encode_32(pl, timeout); 4680 ret |= ceph_pagelist_encode_32(pl, payload_len); 4681 ret |= ceph_pagelist_append(pl, payload, payload_len); 4682 if (ret) { 4683 ceph_pagelist_release(pl); 4684 return -ENOMEM; 4685 } 4686 4687 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 4688 op->indata_len = pl->length; 4689 return 0; 4690 } 4691 4692 /* 4693 * @timeout: in seconds 4694 * 4695 * @preply_{pages,len} are initialized both on success and error. 4696 * The caller is responsible for: 4697 * 4698 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 4699 */ 4700 int ceph_osdc_notify(struct ceph_osd_client *osdc, 4701 struct ceph_object_id *oid, 4702 struct ceph_object_locator *oloc, 4703 void *payload, 4704 u32 payload_len, 4705 u32 timeout, 4706 struct page ***preply_pages, 4707 size_t *preply_len) 4708 { 4709 struct ceph_osd_linger_request *lreq; 4710 struct page **pages; 4711 int ret; 4712 4713 WARN_ON(!timeout); 4714 if (preply_pages) { 4715 *preply_pages = NULL; 4716 *preply_len = 0; 4717 } 4718 4719 lreq = linger_alloc(osdc); 4720 if (!lreq) 4721 return -ENOMEM; 4722 4723 lreq->preply_pages = preply_pages; 4724 lreq->preply_len = preply_len; 4725 4726 ceph_oid_copy(&lreq->t.base_oid, oid); 4727 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4728 lreq->t.flags = CEPH_OSD_FLAG_READ; 4729 4730 lreq->reg_req = alloc_linger_request(lreq); 4731 if (!lreq->reg_req) { 4732 ret = -ENOMEM; 4733 goto out_put_lreq; 4734 } 4735 4736 /* for notify_id */ 4737 pages = ceph_alloc_page_vector(1, GFP_NOIO); 4738 if (IS_ERR(pages)) { 4739 ret = PTR_ERR(pages); 4740 goto out_put_lreq; 4741 } 4742 4743 down_write(&osdc->lock); 4744 linger_register(lreq); /* before osd_req_op_* */ 4745 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1, 4746 timeout, payload, payload_len); 4747 if (ret) { 4748 linger_unregister(lreq); 4749 up_write(&osdc->lock); 4750 ceph_release_page_vector(pages, 1); 4751 goto out_put_lreq; 4752 } 4753 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 4754 response_data), 4755 pages, PAGE_SIZE, 0, false, true); 4756 linger_submit(lreq); 4757 up_write(&osdc->lock); 4758 4759 ret = linger_reg_commit_wait(lreq); 4760 if (!ret) 4761 ret = linger_notify_finish_wait(lreq); 4762 else 4763 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 4764 4765 linger_cancel(lreq); 4766 out_put_lreq: 4767 linger_put(lreq); 4768 return ret; 4769 } 4770 EXPORT_SYMBOL(ceph_osdc_notify); 4771 4772 /* 4773 * Return the number of milliseconds since the watch was last 4774 * confirmed, or an error. If there is an error, the watch is no 4775 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 4776 */ 4777 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 4778 struct ceph_osd_linger_request *lreq) 4779 { 4780 unsigned long stamp, age; 4781 int ret; 4782 4783 down_read(&osdc->lock); 4784 mutex_lock(&lreq->lock); 4785 stamp = lreq->watch_valid_thru; 4786 if (!list_empty(&lreq->pending_lworks)) { 4787 struct linger_work *lwork = 4788 list_first_entry(&lreq->pending_lworks, 4789 struct linger_work, 4790 pending_item); 4791 4792 if (time_before(lwork->queued_stamp, stamp)) 4793 stamp = lwork->queued_stamp; 4794 } 4795 age = jiffies - stamp; 4796 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 4797 lreq, lreq->linger_id, age, lreq->last_error); 4798 /* we are truncating to msecs, so return a safe upper bound */ 4799 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 4800 4801 mutex_unlock(&lreq->lock); 4802 up_read(&osdc->lock); 4803 return ret; 4804 } 4805 4806 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 4807 { 4808 u8 struct_v; 4809 u32 struct_len; 4810 int ret; 4811 4812 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 4813 &struct_v, &struct_len); 4814 if (ret) 4815 return ret; 4816 4817 ceph_decode_copy(p, &item->name, sizeof(item->name)); 4818 item->cookie = ceph_decode_64(p); 4819 *p += 4; /* skip timeout_seconds */ 4820 if (struct_v >= 2) { 4821 ceph_decode_copy(p, &item->addr, sizeof(item->addr)); 4822 ceph_decode_addr(&item->addr); 4823 } 4824 4825 dout("%s %s%llu cookie %llu addr %s\n", __func__, 4826 ENTITY_NAME(item->name), item->cookie, 4827 ceph_pr_addr(&item->addr.in_addr)); 4828 return 0; 4829 } 4830 4831 static int decode_watchers(void **p, void *end, 4832 struct ceph_watch_item **watchers, 4833 u32 *num_watchers) 4834 { 4835 u8 struct_v; 4836 u32 struct_len; 4837 int i; 4838 int ret; 4839 4840 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 4841 &struct_v, &struct_len); 4842 if (ret) 4843 return ret; 4844 4845 *num_watchers = ceph_decode_32(p); 4846 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 4847 if (!*watchers) 4848 return -ENOMEM; 4849 4850 for (i = 0; i < *num_watchers; i++) { 4851 ret = decode_watcher(p, end, *watchers + i); 4852 if (ret) { 4853 kfree(*watchers); 4854 return ret; 4855 } 4856 } 4857 4858 return 0; 4859 } 4860 4861 /* 4862 * On success, the caller is responsible for: 4863 * 4864 * kfree(watchers); 4865 */ 4866 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 4867 struct ceph_object_id *oid, 4868 struct ceph_object_locator *oloc, 4869 struct ceph_watch_item **watchers, 4870 u32 *num_watchers) 4871 { 4872 struct ceph_osd_request *req; 4873 struct page **pages; 4874 int ret; 4875 4876 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4877 if (!req) 4878 return -ENOMEM; 4879 4880 ceph_oid_copy(&req->r_base_oid, oid); 4881 ceph_oloc_copy(&req->r_base_oloc, oloc); 4882 req->r_flags = CEPH_OSD_FLAG_READ; 4883 4884 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4885 if (ret) 4886 goto out_put_req; 4887 4888 pages = ceph_alloc_page_vector(1, GFP_NOIO); 4889 if (IS_ERR(pages)) { 4890 ret = PTR_ERR(pages); 4891 goto out_put_req; 4892 } 4893 4894 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 4895 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 4896 response_data), 4897 pages, PAGE_SIZE, 0, false, true); 4898 4899 ceph_osdc_start_request(osdc, req, false); 4900 ret = ceph_osdc_wait_request(osdc, req); 4901 if (ret >= 0) { 4902 void *p = page_address(pages[0]); 4903 void *const end = p + req->r_ops[0].outdata_len; 4904 4905 ret = decode_watchers(&p, end, watchers, num_watchers); 4906 } 4907 4908 out_put_req: 4909 ceph_osdc_put_request(req); 4910 return ret; 4911 } 4912 EXPORT_SYMBOL(ceph_osdc_list_watchers); 4913 4914 /* 4915 * Call all pending notify callbacks - for use after a watch is 4916 * unregistered, to make sure no more callbacks for it will be invoked 4917 */ 4918 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 4919 { 4920 dout("%s osdc %p\n", __func__, osdc); 4921 flush_workqueue(osdc->notify_wq); 4922 } 4923 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 4924 4925 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 4926 { 4927 down_read(&osdc->lock); 4928 maybe_request_map(osdc); 4929 up_read(&osdc->lock); 4930 } 4931 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 4932 4933 /* 4934 * Execute an OSD class method on an object. 4935 * 4936 * @flags: CEPH_OSD_FLAG_* 4937 * @resp_len: in/out param for reply length 4938 */ 4939 int ceph_osdc_call(struct ceph_osd_client *osdc, 4940 struct ceph_object_id *oid, 4941 struct ceph_object_locator *oloc, 4942 const char *class, const char *method, 4943 unsigned int flags, 4944 struct page *req_page, size_t req_len, 4945 struct page *resp_page, size_t *resp_len) 4946 { 4947 struct ceph_osd_request *req; 4948 int ret; 4949 4950 if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE)) 4951 return -E2BIG; 4952 4953 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4954 if (!req) 4955 return -ENOMEM; 4956 4957 ceph_oid_copy(&req->r_base_oid, oid); 4958 ceph_oloc_copy(&req->r_base_oloc, oloc); 4959 req->r_flags = flags; 4960 4961 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4962 if (ret) 4963 goto out_put_req; 4964 4965 ret = osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method); 4966 if (ret) 4967 goto out_put_req; 4968 4969 if (req_page) 4970 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 4971 0, false, false); 4972 if (resp_page) 4973 osd_req_op_cls_response_data_pages(req, 0, &resp_page, 4974 *resp_len, 0, false, false); 4975 4976 ceph_osdc_start_request(osdc, req, false); 4977 ret = ceph_osdc_wait_request(osdc, req); 4978 if (ret >= 0) { 4979 ret = req->r_ops[0].rval; 4980 if (resp_page) 4981 *resp_len = req->r_ops[0].outdata_len; 4982 } 4983 4984 out_put_req: 4985 ceph_osdc_put_request(req); 4986 return ret; 4987 } 4988 EXPORT_SYMBOL(ceph_osdc_call); 4989 4990 /* 4991 * init, shutdown 4992 */ 4993 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 4994 { 4995 int err; 4996 4997 dout("init\n"); 4998 osdc->client = client; 4999 init_rwsem(&osdc->lock); 5000 osdc->osds = RB_ROOT; 5001 INIT_LIST_HEAD(&osdc->osd_lru); 5002 spin_lock_init(&osdc->osd_lru_lock); 5003 osd_init(&osdc->homeless_osd); 5004 osdc->homeless_osd.o_osdc = osdc; 5005 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 5006 osdc->last_linger_id = CEPH_LINGER_ID_START; 5007 osdc->linger_requests = RB_ROOT; 5008 osdc->map_checks = RB_ROOT; 5009 osdc->linger_map_checks = RB_ROOT; 5010 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 5011 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 5012 5013 err = -ENOMEM; 5014 osdc->osdmap = ceph_osdmap_alloc(); 5015 if (!osdc->osdmap) 5016 goto out; 5017 5018 osdc->req_mempool = mempool_create_slab_pool(10, 5019 ceph_osd_request_cache); 5020 if (!osdc->req_mempool) 5021 goto out_map; 5022 5023 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 5024 PAGE_SIZE, 10, true, "osd_op"); 5025 if (err < 0) 5026 goto out_mempool; 5027 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 5028 PAGE_SIZE, 10, true, "osd_op_reply"); 5029 if (err < 0) 5030 goto out_msgpool; 5031 5032 err = -ENOMEM; 5033 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 5034 if (!osdc->notify_wq) 5035 goto out_msgpool_reply; 5036 5037 osdc->completion_wq = create_singlethread_workqueue("ceph-completion"); 5038 if (!osdc->completion_wq) 5039 goto out_notify_wq; 5040 5041 schedule_delayed_work(&osdc->timeout_work, 5042 osdc->client->options->osd_keepalive_timeout); 5043 schedule_delayed_work(&osdc->osds_timeout_work, 5044 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 5045 5046 return 0; 5047 5048 out_notify_wq: 5049 destroy_workqueue(osdc->notify_wq); 5050 out_msgpool_reply: 5051 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5052 out_msgpool: 5053 ceph_msgpool_destroy(&osdc->msgpool_op); 5054 out_mempool: 5055 mempool_destroy(osdc->req_mempool); 5056 out_map: 5057 ceph_osdmap_destroy(osdc->osdmap); 5058 out: 5059 return err; 5060 } 5061 5062 void ceph_osdc_stop(struct ceph_osd_client *osdc) 5063 { 5064 destroy_workqueue(osdc->completion_wq); 5065 destroy_workqueue(osdc->notify_wq); 5066 cancel_delayed_work_sync(&osdc->timeout_work); 5067 cancel_delayed_work_sync(&osdc->osds_timeout_work); 5068 5069 down_write(&osdc->lock); 5070 while (!RB_EMPTY_ROOT(&osdc->osds)) { 5071 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 5072 struct ceph_osd, o_node); 5073 close_osd(osd); 5074 } 5075 up_write(&osdc->lock); 5076 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1); 5077 osd_cleanup(&osdc->homeless_osd); 5078 5079 WARN_ON(!list_empty(&osdc->osd_lru)); 5080 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 5081 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 5082 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 5083 WARN_ON(atomic_read(&osdc->num_requests)); 5084 WARN_ON(atomic_read(&osdc->num_homeless)); 5085 5086 ceph_osdmap_destroy(osdc->osdmap); 5087 mempool_destroy(osdc->req_mempool); 5088 ceph_msgpool_destroy(&osdc->msgpool_op); 5089 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5090 } 5091 5092 /* 5093 * Read some contiguous pages. If we cross a stripe boundary, shorten 5094 * *plen. Return number of bytes read, or error. 5095 */ 5096 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 5097 struct ceph_vino vino, struct ceph_file_layout *layout, 5098 u64 off, u64 *plen, 5099 u32 truncate_seq, u64 truncate_size, 5100 struct page **pages, int num_pages, int page_align) 5101 { 5102 struct ceph_osd_request *req; 5103 int rc = 0; 5104 5105 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 5106 vino.snap, off, *plen); 5107 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 5108 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 5109 NULL, truncate_seq, truncate_size, 5110 false); 5111 if (IS_ERR(req)) 5112 return PTR_ERR(req); 5113 5114 /* it may be a short read due to an object boundary */ 5115 osd_req_op_extent_osd_data_pages(req, 0, 5116 pages, *plen, page_align, false, false); 5117 5118 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 5119 off, *plen, *plen, page_align); 5120 5121 rc = ceph_osdc_start_request(osdc, req, false); 5122 if (!rc) 5123 rc = ceph_osdc_wait_request(osdc, req); 5124 5125 ceph_osdc_put_request(req); 5126 dout("readpages result %d\n", rc); 5127 return rc; 5128 } 5129 EXPORT_SYMBOL(ceph_osdc_readpages); 5130 5131 /* 5132 * do a synchronous write on N pages 5133 */ 5134 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 5135 struct ceph_file_layout *layout, 5136 struct ceph_snap_context *snapc, 5137 u64 off, u64 len, 5138 u32 truncate_seq, u64 truncate_size, 5139 struct timespec64 *mtime, 5140 struct page **pages, int num_pages) 5141 { 5142 struct ceph_osd_request *req; 5143 int rc = 0; 5144 int page_align = off & ~PAGE_MASK; 5145 5146 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 5147 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, 5148 snapc, truncate_seq, truncate_size, 5149 true); 5150 if (IS_ERR(req)) 5151 return PTR_ERR(req); 5152 5153 /* it may be a short write due to an object boundary */ 5154 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 5155 false, false); 5156 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 5157 5158 req->r_mtime = *mtime; 5159 rc = ceph_osdc_start_request(osdc, req, true); 5160 if (!rc) 5161 rc = ceph_osdc_wait_request(osdc, req); 5162 5163 ceph_osdc_put_request(req); 5164 if (rc == 0) 5165 rc = len; 5166 dout("writepages result %d\n", rc); 5167 return rc; 5168 } 5169 EXPORT_SYMBOL(ceph_osdc_writepages); 5170 5171 int __init ceph_osdc_setup(void) 5172 { 5173 size_t size = sizeof(struct ceph_osd_request) + 5174 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 5175 5176 BUG_ON(ceph_osd_request_cache); 5177 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 5178 0, 0, NULL); 5179 5180 return ceph_osd_request_cache ? 0 : -ENOMEM; 5181 } 5182 5183 void ceph_osdc_cleanup(void) 5184 { 5185 BUG_ON(!ceph_osd_request_cache); 5186 kmem_cache_destroy(ceph_osd_request_cache); 5187 ceph_osd_request_cache = NULL; 5188 } 5189 5190 /* 5191 * handle incoming message 5192 */ 5193 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 5194 { 5195 struct ceph_osd *osd = con->private; 5196 struct ceph_osd_client *osdc = osd->o_osdc; 5197 int type = le16_to_cpu(msg->hdr.type); 5198 5199 switch (type) { 5200 case CEPH_MSG_OSD_MAP: 5201 ceph_osdc_handle_map(osdc, msg); 5202 break; 5203 case CEPH_MSG_OSD_OPREPLY: 5204 handle_reply(osd, msg); 5205 break; 5206 case CEPH_MSG_OSD_BACKOFF: 5207 handle_backoff(osd, msg); 5208 break; 5209 case CEPH_MSG_WATCH_NOTIFY: 5210 handle_watch_notify(osdc, msg); 5211 break; 5212 5213 default: 5214 pr_err("received unknown message type %d %s\n", type, 5215 ceph_msg_type_name(type)); 5216 } 5217 5218 ceph_msg_put(msg); 5219 } 5220 5221 /* 5222 * Lookup and return message for incoming reply. Don't try to do 5223 * anything about a larger than preallocated data portion of the 5224 * message at the moment - for now, just skip the message. 5225 */ 5226 static struct ceph_msg *get_reply(struct ceph_connection *con, 5227 struct ceph_msg_header *hdr, 5228 int *skip) 5229 { 5230 struct ceph_osd *osd = con->private; 5231 struct ceph_osd_client *osdc = osd->o_osdc; 5232 struct ceph_msg *m = NULL; 5233 struct ceph_osd_request *req; 5234 int front_len = le32_to_cpu(hdr->front_len); 5235 int data_len = le32_to_cpu(hdr->data_len); 5236 u64 tid = le64_to_cpu(hdr->tid); 5237 5238 down_read(&osdc->lock); 5239 if (!osd_registered(osd)) { 5240 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 5241 *skip = 1; 5242 goto out_unlock_osdc; 5243 } 5244 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 5245 5246 mutex_lock(&osd->lock); 5247 req = lookup_request(&osd->o_requests, tid); 5248 if (!req) { 5249 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 5250 osd->o_osd, tid); 5251 *skip = 1; 5252 goto out_unlock_session; 5253 } 5254 5255 ceph_msg_revoke_incoming(req->r_reply); 5256 5257 if (front_len > req->r_reply->front_alloc_len) { 5258 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 5259 __func__, osd->o_osd, req->r_tid, front_len, 5260 req->r_reply->front_alloc_len); 5261 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 5262 false); 5263 if (!m) 5264 goto out_unlock_session; 5265 ceph_msg_put(req->r_reply); 5266 req->r_reply = m; 5267 } 5268 5269 if (data_len > req->r_reply->data_length) { 5270 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 5271 __func__, osd->o_osd, req->r_tid, data_len, 5272 req->r_reply->data_length); 5273 m = NULL; 5274 *skip = 1; 5275 goto out_unlock_session; 5276 } 5277 5278 m = ceph_msg_get(req->r_reply); 5279 dout("get_reply tid %lld %p\n", tid, m); 5280 5281 out_unlock_session: 5282 mutex_unlock(&osd->lock); 5283 out_unlock_osdc: 5284 up_read(&osdc->lock); 5285 return m; 5286 } 5287 5288 /* 5289 * TODO: switch to a msg-owned pagelist 5290 */ 5291 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 5292 { 5293 struct ceph_msg *m; 5294 int type = le16_to_cpu(hdr->type); 5295 u32 front_len = le32_to_cpu(hdr->front_len); 5296 u32 data_len = le32_to_cpu(hdr->data_len); 5297 5298 m = ceph_msg_new(type, front_len, GFP_NOIO, false); 5299 if (!m) 5300 return NULL; 5301 5302 if (data_len) { 5303 struct page **pages; 5304 struct ceph_osd_data osd_data; 5305 5306 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 5307 GFP_NOIO); 5308 if (IS_ERR(pages)) { 5309 ceph_msg_put(m); 5310 return NULL; 5311 } 5312 5313 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false, 5314 false); 5315 ceph_osdc_msg_data_add(m, &osd_data); 5316 } 5317 5318 return m; 5319 } 5320 5321 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 5322 struct ceph_msg_header *hdr, 5323 int *skip) 5324 { 5325 struct ceph_osd *osd = con->private; 5326 int type = le16_to_cpu(hdr->type); 5327 5328 *skip = 0; 5329 switch (type) { 5330 case CEPH_MSG_OSD_MAP: 5331 case CEPH_MSG_OSD_BACKOFF: 5332 case CEPH_MSG_WATCH_NOTIFY: 5333 return alloc_msg_with_page_vector(hdr); 5334 case CEPH_MSG_OSD_OPREPLY: 5335 return get_reply(con, hdr, skip); 5336 default: 5337 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 5338 osd->o_osd, type); 5339 *skip = 1; 5340 return NULL; 5341 } 5342 } 5343 5344 /* 5345 * Wrappers to refcount containing ceph_osd struct 5346 */ 5347 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 5348 { 5349 struct ceph_osd *osd = con->private; 5350 if (get_osd(osd)) 5351 return con; 5352 return NULL; 5353 } 5354 5355 static void put_osd_con(struct ceph_connection *con) 5356 { 5357 struct ceph_osd *osd = con->private; 5358 put_osd(osd); 5359 } 5360 5361 /* 5362 * authentication 5363 */ 5364 /* 5365 * Note: returned pointer is the address of a structure that's 5366 * managed separately. Caller must *not* attempt to free it. 5367 */ 5368 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 5369 int *proto, int force_new) 5370 { 5371 struct ceph_osd *o = con->private; 5372 struct ceph_osd_client *osdc = o->o_osdc; 5373 struct ceph_auth_client *ac = osdc->client->monc.auth; 5374 struct ceph_auth_handshake *auth = &o->o_auth; 5375 5376 if (force_new && auth->authorizer) { 5377 ceph_auth_destroy_authorizer(auth->authorizer); 5378 auth->authorizer = NULL; 5379 } 5380 if (!auth->authorizer) { 5381 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5382 auth); 5383 if (ret) 5384 return ERR_PTR(ret); 5385 } else { 5386 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5387 auth); 5388 if (ret) 5389 return ERR_PTR(ret); 5390 } 5391 *proto = ac->protocol; 5392 5393 return auth; 5394 } 5395 5396 static int add_authorizer_challenge(struct ceph_connection *con, 5397 void *challenge_buf, int challenge_buf_len) 5398 { 5399 struct ceph_osd *o = con->private; 5400 struct ceph_osd_client *osdc = o->o_osdc; 5401 struct ceph_auth_client *ac = osdc->client->monc.auth; 5402 5403 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer, 5404 challenge_buf, challenge_buf_len); 5405 } 5406 5407 static int verify_authorizer_reply(struct ceph_connection *con) 5408 { 5409 struct ceph_osd *o = con->private; 5410 struct ceph_osd_client *osdc = o->o_osdc; 5411 struct ceph_auth_client *ac = osdc->client->monc.auth; 5412 5413 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer); 5414 } 5415 5416 static int invalidate_authorizer(struct ceph_connection *con) 5417 { 5418 struct ceph_osd *o = con->private; 5419 struct ceph_osd_client *osdc = o->o_osdc; 5420 struct ceph_auth_client *ac = osdc->client->monc.auth; 5421 5422 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 5423 return ceph_monc_validate_auth(&osdc->client->monc); 5424 } 5425 5426 static void osd_reencode_message(struct ceph_msg *msg) 5427 { 5428 int type = le16_to_cpu(msg->hdr.type); 5429 5430 if (type == CEPH_MSG_OSD_OP) 5431 encode_request_finish(msg); 5432 } 5433 5434 static int osd_sign_message(struct ceph_msg *msg) 5435 { 5436 struct ceph_osd *o = msg->con->private; 5437 struct ceph_auth_handshake *auth = &o->o_auth; 5438 5439 return ceph_auth_sign_message(auth, msg); 5440 } 5441 5442 static int osd_check_message_signature(struct ceph_msg *msg) 5443 { 5444 struct ceph_osd *o = msg->con->private; 5445 struct ceph_auth_handshake *auth = &o->o_auth; 5446 5447 return ceph_auth_check_message_signature(auth, msg); 5448 } 5449 5450 static const struct ceph_connection_operations osd_con_ops = { 5451 .get = get_osd_con, 5452 .put = put_osd_con, 5453 .dispatch = dispatch, 5454 .get_authorizer = get_authorizer, 5455 .add_authorizer_challenge = add_authorizer_challenge, 5456 .verify_authorizer_reply = verify_authorizer_reply, 5457 .invalidate_authorizer = invalidate_authorizer, 5458 .alloc_msg = alloc_msg, 5459 .reencode_message = osd_reencode_message, 5460 .sign_message = osd_sign_message, 5461 .check_message_signature = osd_check_message_signature, 5462 .fault = osd_fault, 5463 }; 5464