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 /* 130 * Consumes @pages if @own_pages is true. 131 */ 132 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data, 133 struct page **pages, u64 length, u32 alignment, 134 bool pages_from_pool, bool own_pages) 135 { 136 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; 137 osd_data->pages = pages; 138 osd_data->length = length; 139 osd_data->alignment = alignment; 140 osd_data->pages_from_pool = pages_from_pool; 141 osd_data->own_pages = own_pages; 142 } 143 144 /* 145 * Consumes a ref on @pagelist. 146 */ 147 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, 148 struct ceph_pagelist *pagelist) 149 { 150 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST; 151 osd_data->pagelist = pagelist; 152 } 153 154 #ifdef CONFIG_BLOCK 155 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, 156 struct ceph_bio_iter *bio_pos, 157 u32 bio_length) 158 { 159 osd_data->type = CEPH_OSD_DATA_TYPE_BIO; 160 osd_data->bio_pos = *bio_pos; 161 osd_data->bio_length = bio_length; 162 } 163 #endif /* CONFIG_BLOCK */ 164 165 static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data, 166 struct ceph_bvec_iter *bvec_pos, 167 u32 num_bvecs) 168 { 169 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS; 170 osd_data->bvec_pos = *bvec_pos; 171 osd_data->num_bvecs = num_bvecs; 172 } 173 174 static struct ceph_osd_data * 175 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) 176 { 177 BUG_ON(which >= osd_req->r_num_ops); 178 179 return &osd_req->r_ops[which].raw_data_in; 180 } 181 182 struct ceph_osd_data * 183 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, 184 unsigned int which) 185 { 186 return osd_req_op_data(osd_req, which, extent, osd_data); 187 } 188 EXPORT_SYMBOL(osd_req_op_extent_osd_data); 189 190 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, 191 unsigned int which, struct page **pages, 192 u64 length, u32 alignment, 193 bool pages_from_pool, bool own_pages) 194 { 195 struct ceph_osd_data *osd_data; 196 197 osd_data = osd_req_op_raw_data_in(osd_req, which); 198 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 199 pages_from_pool, own_pages); 200 } 201 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); 202 203 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, 204 unsigned int which, struct page **pages, 205 u64 length, u32 alignment, 206 bool pages_from_pool, bool own_pages) 207 { 208 struct ceph_osd_data *osd_data; 209 210 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 211 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 212 pages_from_pool, own_pages); 213 } 214 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); 215 216 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, 217 unsigned int which, struct ceph_pagelist *pagelist) 218 { 219 struct ceph_osd_data *osd_data; 220 221 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 222 ceph_osd_data_pagelist_init(osd_data, pagelist); 223 } 224 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); 225 226 #ifdef CONFIG_BLOCK 227 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 228 unsigned int which, 229 struct ceph_bio_iter *bio_pos, 230 u32 bio_length) 231 { 232 struct ceph_osd_data *osd_data; 233 234 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 235 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length); 236 } 237 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); 238 #endif /* CONFIG_BLOCK */ 239 240 void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req, 241 unsigned int which, 242 struct bio_vec *bvecs, u32 num_bvecs, 243 u32 bytes) 244 { 245 struct ceph_osd_data *osd_data; 246 struct ceph_bvec_iter it = { 247 .bvecs = bvecs, 248 .iter = { .bi_size = bytes }, 249 }; 250 251 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 252 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs); 253 } 254 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs); 255 256 void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req, 257 unsigned int which, 258 struct ceph_bvec_iter *bvec_pos) 259 { 260 struct ceph_osd_data *osd_data; 261 262 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 263 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0); 264 } 265 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos); 266 267 static void osd_req_op_cls_request_info_pagelist( 268 struct ceph_osd_request *osd_req, 269 unsigned int which, struct ceph_pagelist *pagelist) 270 { 271 struct ceph_osd_data *osd_data; 272 273 osd_data = osd_req_op_data(osd_req, which, cls, request_info); 274 ceph_osd_data_pagelist_init(osd_data, pagelist); 275 } 276 277 void osd_req_op_cls_request_data_pagelist( 278 struct ceph_osd_request *osd_req, 279 unsigned int which, struct ceph_pagelist *pagelist) 280 { 281 struct ceph_osd_data *osd_data; 282 283 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 284 ceph_osd_data_pagelist_init(osd_data, pagelist); 285 osd_req->r_ops[which].cls.indata_len += pagelist->length; 286 osd_req->r_ops[which].indata_len += pagelist->length; 287 } 288 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); 289 290 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, 291 unsigned int which, struct page **pages, u64 length, 292 u32 alignment, bool pages_from_pool, bool own_pages) 293 { 294 struct ceph_osd_data *osd_data; 295 296 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 297 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 298 pages_from_pool, own_pages); 299 osd_req->r_ops[which].cls.indata_len += length; 300 osd_req->r_ops[which].indata_len += length; 301 } 302 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); 303 304 void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req, 305 unsigned int which, 306 struct bio_vec *bvecs, u32 num_bvecs, 307 u32 bytes) 308 { 309 struct ceph_osd_data *osd_data; 310 struct ceph_bvec_iter it = { 311 .bvecs = bvecs, 312 .iter = { .bi_size = bytes }, 313 }; 314 315 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 316 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs); 317 osd_req->r_ops[which].cls.indata_len += bytes; 318 osd_req->r_ops[which].indata_len += bytes; 319 } 320 EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs); 321 322 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, 323 unsigned int which, struct page **pages, u64 length, 324 u32 alignment, bool pages_from_pool, bool own_pages) 325 { 326 struct ceph_osd_data *osd_data; 327 328 osd_data = osd_req_op_data(osd_req, which, cls, response_data); 329 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 330 pages_from_pool, own_pages); 331 } 332 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); 333 334 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) 335 { 336 switch (osd_data->type) { 337 case CEPH_OSD_DATA_TYPE_NONE: 338 return 0; 339 case CEPH_OSD_DATA_TYPE_PAGES: 340 return osd_data->length; 341 case CEPH_OSD_DATA_TYPE_PAGELIST: 342 return (u64)osd_data->pagelist->length; 343 #ifdef CONFIG_BLOCK 344 case CEPH_OSD_DATA_TYPE_BIO: 345 return (u64)osd_data->bio_length; 346 #endif /* CONFIG_BLOCK */ 347 case CEPH_OSD_DATA_TYPE_BVECS: 348 return osd_data->bvec_pos.iter.bi_size; 349 default: 350 WARN(true, "unrecognized data type %d\n", (int)osd_data->type); 351 return 0; 352 } 353 } 354 355 static void ceph_osd_data_release(struct ceph_osd_data *osd_data) 356 { 357 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { 358 int num_pages; 359 360 num_pages = calc_pages_for((u64)osd_data->alignment, 361 (u64)osd_data->length); 362 ceph_release_page_vector(osd_data->pages, num_pages); 363 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 364 ceph_pagelist_release(osd_data->pagelist); 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 case CEPH_OSD_OP_COPY_FROM: 406 ceph_osd_data_release(&op->copy_from.osd_data); 407 break; 408 default: 409 break; 410 } 411 } 412 413 /* 414 * Assumes @t is zero-initialized. 415 */ 416 static void target_init(struct ceph_osd_request_target *t) 417 { 418 ceph_oid_init(&t->base_oid); 419 ceph_oloc_init(&t->base_oloc); 420 ceph_oid_init(&t->target_oid); 421 ceph_oloc_init(&t->target_oloc); 422 423 ceph_osds_init(&t->acting); 424 ceph_osds_init(&t->up); 425 t->size = -1; 426 t->min_size = -1; 427 428 t->osd = CEPH_HOMELESS_OSD; 429 } 430 431 static void target_copy(struct ceph_osd_request_target *dest, 432 const struct ceph_osd_request_target *src) 433 { 434 ceph_oid_copy(&dest->base_oid, &src->base_oid); 435 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc); 436 ceph_oid_copy(&dest->target_oid, &src->target_oid); 437 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc); 438 439 dest->pgid = src->pgid; /* struct */ 440 dest->spgid = src->spgid; /* struct */ 441 dest->pg_num = src->pg_num; 442 dest->pg_num_mask = src->pg_num_mask; 443 ceph_osds_copy(&dest->acting, &src->acting); 444 ceph_osds_copy(&dest->up, &src->up); 445 dest->size = src->size; 446 dest->min_size = src->min_size; 447 dest->sort_bitwise = src->sort_bitwise; 448 449 dest->flags = src->flags; 450 dest->paused = src->paused; 451 452 dest->epoch = src->epoch; 453 dest->last_force_resend = src->last_force_resend; 454 455 dest->osd = src->osd; 456 } 457 458 static void target_destroy(struct ceph_osd_request_target *t) 459 { 460 ceph_oid_destroy(&t->base_oid); 461 ceph_oloc_destroy(&t->base_oloc); 462 ceph_oid_destroy(&t->target_oid); 463 ceph_oloc_destroy(&t->target_oloc); 464 } 465 466 /* 467 * requests 468 */ 469 static void request_release_checks(struct ceph_osd_request *req) 470 { 471 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 472 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node)); 473 WARN_ON(!list_empty(&req->r_private_item)); 474 WARN_ON(req->r_osd); 475 } 476 477 static void ceph_osdc_release_request(struct kref *kref) 478 { 479 struct ceph_osd_request *req = container_of(kref, 480 struct ceph_osd_request, r_kref); 481 unsigned int which; 482 483 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 484 req->r_request, req->r_reply); 485 request_release_checks(req); 486 487 if (req->r_request) 488 ceph_msg_put(req->r_request); 489 if (req->r_reply) 490 ceph_msg_put(req->r_reply); 491 492 for (which = 0; which < req->r_num_ops; which++) 493 osd_req_op_data_release(req, which); 494 495 target_destroy(&req->r_t); 496 ceph_put_snap_context(req->r_snapc); 497 498 if (req->r_mempool) 499 mempool_free(req, req->r_osdc->req_mempool); 500 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) 501 kmem_cache_free(ceph_osd_request_cache, req); 502 else 503 kfree(req); 504 } 505 506 void ceph_osdc_get_request(struct ceph_osd_request *req) 507 { 508 dout("%s %p (was %d)\n", __func__, req, 509 kref_read(&req->r_kref)); 510 kref_get(&req->r_kref); 511 } 512 EXPORT_SYMBOL(ceph_osdc_get_request); 513 514 void ceph_osdc_put_request(struct ceph_osd_request *req) 515 { 516 if (req) { 517 dout("%s %p (was %d)\n", __func__, req, 518 kref_read(&req->r_kref)); 519 kref_put(&req->r_kref, ceph_osdc_release_request); 520 } 521 } 522 EXPORT_SYMBOL(ceph_osdc_put_request); 523 524 static void request_init(struct ceph_osd_request *req) 525 { 526 /* req only, each op is zeroed in _osd_req_op_init() */ 527 memset(req, 0, sizeof(*req)); 528 529 kref_init(&req->r_kref); 530 init_completion(&req->r_completion); 531 RB_CLEAR_NODE(&req->r_node); 532 RB_CLEAR_NODE(&req->r_mc_node); 533 INIT_LIST_HEAD(&req->r_private_item); 534 535 target_init(&req->r_t); 536 } 537 538 /* 539 * This is ugly, but it allows us to reuse linger registration and ping 540 * requests, keeping the structure of the code around send_linger{_ping}() 541 * reasonable. Setting up a min_nr=2 mempool for each linger request 542 * and dealing with copying ops (this blasts req only, watch op remains 543 * intact) isn't any better. 544 */ 545 static void request_reinit(struct ceph_osd_request *req) 546 { 547 struct ceph_osd_client *osdc = req->r_osdc; 548 bool mempool = req->r_mempool; 549 unsigned int num_ops = req->r_num_ops; 550 u64 snapid = req->r_snapid; 551 struct ceph_snap_context *snapc = req->r_snapc; 552 bool linger = req->r_linger; 553 struct ceph_msg *request_msg = req->r_request; 554 struct ceph_msg *reply_msg = req->r_reply; 555 556 dout("%s req %p\n", __func__, req); 557 WARN_ON(kref_read(&req->r_kref) != 1); 558 request_release_checks(req); 559 560 WARN_ON(kref_read(&request_msg->kref) != 1); 561 WARN_ON(kref_read(&reply_msg->kref) != 1); 562 target_destroy(&req->r_t); 563 564 request_init(req); 565 req->r_osdc = osdc; 566 req->r_mempool = mempool; 567 req->r_num_ops = num_ops; 568 req->r_snapid = snapid; 569 req->r_snapc = snapc; 570 req->r_linger = linger; 571 req->r_request = request_msg; 572 req->r_reply = reply_msg; 573 } 574 575 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 576 struct ceph_snap_context *snapc, 577 unsigned int num_ops, 578 bool use_mempool, 579 gfp_t gfp_flags) 580 { 581 struct ceph_osd_request *req; 582 583 if (use_mempool) { 584 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 585 req = mempool_alloc(osdc->req_mempool, gfp_flags); 586 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 587 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 588 } else { 589 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 590 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags); 591 } 592 if (unlikely(!req)) 593 return NULL; 594 595 request_init(req); 596 req->r_osdc = osdc; 597 req->r_mempool = use_mempool; 598 req->r_num_ops = num_ops; 599 req->r_snapid = CEPH_NOSNAP; 600 req->r_snapc = ceph_get_snap_context(snapc); 601 602 dout("%s req %p\n", __func__, req); 603 return req; 604 } 605 EXPORT_SYMBOL(ceph_osdc_alloc_request); 606 607 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc) 608 { 609 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); 610 } 611 612 static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp, 613 int num_request_data_items, 614 int num_reply_data_items) 615 { 616 struct ceph_osd_client *osdc = req->r_osdc; 617 struct ceph_msg *msg; 618 int msg_size; 619 620 WARN_ON(req->r_request || req->r_reply); 621 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 622 WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); 623 624 /* create request message */ 625 msg_size = CEPH_ENCODING_START_BLK_LEN + 626 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 627 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */ 628 msg_size += CEPH_ENCODING_START_BLK_LEN + 629 sizeof(struct ceph_osd_reqid); /* reqid */ 630 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */ 631 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */ 632 msg_size += CEPH_ENCODING_START_BLK_LEN + 633 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 634 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 635 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 636 msg_size += 8; /* snapid */ 637 msg_size += 8; /* snap_seq */ 638 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 639 msg_size += 4 + 8; /* retry_attempt, features */ 640 641 if (req->r_mempool) 642 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size, 643 num_request_data_items); 644 else 645 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size, 646 num_request_data_items, gfp, true); 647 if (!msg) 648 return -ENOMEM; 649 650 memset(msg->front.iov_base, 0, msg->front.iov_len); 651 req->r_request = msg; 652 653 /* create reply message */ 654 msg_size = OSD_OPREPLY_FRONT_LEN; 655 msg_size += req->r_base_oid.name_len; 656 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 657 658 if (req->r_mempool) 659 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size, 660 num_reply_data_items); 661 else 662 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size, 663 num_reply_data_items, gfp, true); 664 if (!msg) 665 return -ENOMEM; 666 667 req->r_reply = msg; 668 669 return 0; 670 } 671 672 static bool osd_req_opcode_valid(u16 opcode) 673 { 674 switch (opcode) { 675 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 676 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 677 #undef GENERATE_CASE 678 default: 679 return false; 680 } 681 } 682 683 static void get_num_data_items(struct ceph_osd_request *req, 684 int *num_request_data_items, 685 int *num_reply_data_items) 686 { 687 struct ceph_osd_req_op *op; 688 689 *num_request_data_items = 0; 690 *num_reply_data_items = 0; 691 692 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { 693 switch (op->op) { 694 /* request */ 695 case CEPH_OSD_OP_WRITE: 696 case CEPH_OSD_OP_WRITEFULL: 697 case CEPH_OSD_OP_SETXATTR: 698 case CEPH_OSD_OP_CMPXATTR: 699 case CEPH_OSD_OP_NOTIFY_ACK: 700 case CEPH_OSD_OP_COPY_FROM: 701 *num_request_data_items += 1; 702 break; 703 704 /* reply */ 705 case CEPH_OSD_OP_STAT: 706 case CEPH_OSD_OP_READ: 707 case CEPH_OSD_OP_LIST_WATCHERS: 708 *num_reply_data_items += 1; 709 break; 710 711 /* both */ 712 case CEPH_OSD_OP_NOTIFY: 713 *num_request_data_items += 1; 714 *num_reply_data_items += 1; 715 break; 716 case CEPH_OSD_OP_CALL: 717 *num_request_data_items += 2; 718 *num_reply_data_items += 1; 719 break; 720 721 default: 722 WARN_ON(!osd_req_opcode_valid(op->op)); 723 break; 724 } 725 } 726 } 727 728 /* 729 * oid, oloc and OSD op opcode(s) must be filled in before this function 730 * is called. 731 */ 732 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 733 { 734 int num_request_data_items, num_reply_data_items; 735 736 get_num_data_items(req, &num_request_data_items, &num_reply_data_items); 737 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items, 738 num_reply_data_items); 739 } 740 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 741 742 /* 743 * This is an osd op init function for opcodes that have no data or 744 * other information associated with them. It also serves as a 745 * common init routine for all the other init functions, below. 746 */ 747 static struct ceph_osd_req_op * 748 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 749 u16 opcode, u32 flags) 750 { 751 struct ceph_osd_req_op *op; 752 753 BUG_ON(which >= osd_req->r_num_ops); 754 BUG_ON(!osd_req_opcode_valid(opcode)); 755 756 op = &osd_req->r_ops[which]; 757 memset(op, 0, sizeof (*op)); 758 op->op = opcode; 759 op->flags = flags; 760 761 return op; 762 } 763 764 void osd_req_op_init(struct ceph_osd_request *osd_req, 765 unsigned int which, u16 opcode, u32 flags) 766 { 767 (void)_osd_req_op_init(osd_req, which, opcode, flags); 768 } 769 EXPORT_SYMBOL(osd_req_op_init); 770 771 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 772 unsigned int which, u16 opcode, 773 u64 offset, u64 length, 774 u64 truncate_size, u32 truncate_seq) 775 { 776 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 777 opcode, 0); 778 size_t payload_len = 0; 779 780 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 781 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 782 opcode != CEPH_OSD_OP_TRUNCATE); 783 784 op->extent.offset = offset; 785 op->extent.length = length; 786 op->extent.truncate_size = truncate_size; 787 op->extent.truncate_seq = truncate_seq; 788 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 789 payload_len += length; 790 791 op->indata_len = payload_len; 792 } 793 EXPORT_SYMBOL(osd_req_op_extent_init); 794 795 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 796 unsigned int which, u64 length) 797 { 798 struct ceph_osd_req_op *op; 799 u64 previous; 800 801 BUG_ON(which >= osd_req->r_num_ops); 802 op = &osd_req->r_ops[which]; 803 previous = op->extent.length; 804 805 if (length == previous) 806 return; /* Nothing to do */ 807 BUG_ON(length > previous); 808 809 op->extent.length = length; 810 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 811 op->indata_len -= previous - length; 812 } 813 EXPORT_SYMBOL(osd_req_op_extent_update); 814 815 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 816 unsigned int which, u64 offset_inc) 817 { 818 struct ceph_osd_req_op *op, *prev_op; 819 820 BUG_ON(which + 1 >= osd_req->r_num_ops); 821 822 prev_op = &osd_req->r_ops[which]; 823 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 824 /* dup previous one */ 825 op->indata_len = prev_op->indata_len; 826 op->outdata_len = prev_op->outdata_len; 827 op->extent = prev_op->extent; 828 /* adjust offset */ 829 op->extent.offset += offset_inc; 830 op->extent.length -= offset_inc; 831 832 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 833 op->indata_len -= offset_inc; 834 } 835 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 836 837 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 838 const char *class, const char *method) 839 { 840 struct ceph_osd_req_op *op; 841 struct ceph_pagelist *pagelist; 842 size_t payload_len = 0; 843 size_t size; 844 845 op = _osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0); 846 847 pagelist = ceph_pagelist_alloc(GFP_NOFS); 848 if (!pagelist) 849 return -ENOMEM; 850 851 op->cls.class_name = class; 852 size = strlen(class); 853 BUG_ON(size > (size_t) U8_MAX); 854 op->cls.class_len = size; 855 ceph_pagelist_append(pagelist, class, size); 856 payload_len += size; 857 858 op->cls.method_name = method; 859 size = strlen(method); 860 BUG_ON(size > (size_t) U8_MAX); 861 op->cls.method_len = size; 862 ceph_pagelist_append(pagelist, method, size); 863 payload_len += size; 864 865 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 866 867 op->indata_len = payload_len; 868 return 0; 869 } 870 EXPORT_SYMBOL(osd_req_op_cls_init); 871 872 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 873 u16 opcode, const char *name, const void *value, 874 size_t size, u8 cmp_op, u8 cmp_mode) 875 { 876 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 877 opcode, 0); 878 struct ceph_pagelist *pagelist; 879 size_t payload_len; 880 881 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 882 883 pagelist = ceph_pagelist_alloc(GFP_NOFS); 884 if (!pagelist) 885 return -ENOMEM; 886 887 payload_len = strlen(name); 888 op->xattr.name_len = payload_len; 889 ceph_pagelist_append(pagelist, name, payload_len); 890 891 op->xattr.value_len = size; 892 ceph_pagelist_append(pagelist, value, size); 893 payload_len += size; 894 895 op->xattr.cmp_op = cmp_op; 896 op->xattr.cmp_mode = cmp_mode; 897 898 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 899 op->indata_len = payload_len; 900 return 0; 901 } 902 EXPORT_SYMBOL(osd_req_op_xattr_init); 903 904 /* 905 * @watch_opcode: CEPH_OSD_WATCH_OP_* 906 */ 907 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 908 u64 cookie, u8 watch_opcode) 909 { 910 struct ceph_osd_req_op *op; 911 912 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 913 op->watch.cookie = cookie; 914 op->watch.op = watch_opcode; 915 op->watch.gen = 0; 916 } 917 918 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 919 unsigned int which, 920 u64 expected_object_size, 921 u64 expected_write_size) 922 { 923 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 924 CEPH_OSD_OP_SETALLOCHINT, 925 0); 926 927 op->alloc_hint.expected_object_size = expected_object_size; 928 op->alloc_hint.expected_write_size = expected_write_size; 929 930 /* 931 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 932 * not worth a feature bit. Set FAILOK per-op flag to make 933 * sure older osds don't trip over an unsupported opcode. 934 */ 935 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 936 } 937 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 938 939 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 940 struct ceph_osd_data *osd_data) 941 { 942 u64 length = ceph_osd_data_length(osd_data); 943 944 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 945 BUG_ON(length > (u64) SIZE_MAX); 946 if (length) 947 ceph_msg_data_add_pages(msg, osd_data->pages, 948 length, osd_data->alignment); 949 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 950 BUG_ON(!length); 951 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 952 #ifdef CONFIG_BLOCK 953 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 954 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length); 955 #endif 956 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) { 957 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos); 958 } else { 959 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 960 } 961 } 962 963 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 964 const struct ceph_osd_req_op *src) 965 { 966 switch (src->op) { 967 case CEPH_OSD_OP_STAT: 968 break; 969 case CEPH_OSD_OP_READ: 970 case CEPH_OSD_OP_WRITE: 971 case CEPH_OSD_OP_WRITEFULL: 972 case CEPH_OSD_OP_ZERO: 973 case CEPH_OSD_OP_TRUNCATE: 974 dst->extent.offset = cpu_to_le64(src->extent.offset); 975 dst->extent.length = cpu_to_le64(src->extent.length); 976 dst->extent.truncate_size = 977 cpu_to_le64(src->extent.truncate_size); 978 dst->extent.truncate_seq = 979 cpu_to_le32(src->extent.truncate_seq); 980 break; 981 case CEPH_OSD_OP_CALL: 982 dst->cls.class_len = src->cls.class_len; 983 dst->cls.method_len = src->cls.method_len; 984 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 985 break; 986 case CEPH_OSD_OP_WATCH: 987 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 988 dst->watch.ver = cpu_to_le64(0); 989 dst->watch.op = src->watch.op; 990 dst->watch.gen = cpu_to_le32(src->watch.gen); 991 break; 992 case CEPH_OSD_OP_NOTIFY_ACK: 993 break; 994 case CEPH_OSD_OP_NOTIFY: 995 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 996 break; 997 case CEPH_OSD_OP_LIST_WATCHERS: 998 break; 999 case CEPH_OSD_OP_SETALLOCHINT: 1000 dst->alloc_hint.expected_object_size = 1001 cpu_to_le64(src->alloc_hint.expected_object_size); 1002 dst->alloc_hint.expected_write_size = 1003 cpu_to_le64(src->alloc_hint.expected_write_size); 1004 break; 1005 case CEPH_OSD_OP_SETXATTR: 1006 case CEPH_OSD_OP_CMPXATTR: 1007 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 1008 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 1009 dst->xattr.cmp_op = src->xattr.cmp_op; 1010 dst->xattr.cmp_mode = src->xattr.cmp_mode; 1011 break; 1012 case CEPH_OSD_OP_CREATE: 1013 case CEPH_OSD_OP_DELETE: 1014 break; 1015 case CEPH_OSD_OP_COPY_FROM: 1016 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid); 1017 dst->copy_from.src_version = 1018 cpu_to_le64(src->copy_from.src_version); 1019 dst->copy_from.flags = src->copy_from.flags; 1020 dst->copy_from.src_fadvise_flags = 1021 cpu_to_le32(src->copy_from.src_fadvise_flags); 1022 break; 1023 default: 1024 pr_err("unsupported osd opcode %s\n", 1025 ceph_osd_op_name(src->op)); 1026 WARN_ON(1); 1027 1028 return 0; 1029 } 1030 1031 dst->op = cpu_to_le16(src->op); 1032 dst->flags = cpu_to_le32(src->flags); 1033 dst->payload_len = cpu_to_le32(src->indata_len); 1034 1035 return src->indata_len; 1036 } 1037 1038 /* 1039 * build new request AND message, calculate layout, and adjust file 1040 * extent as needed. 1041 * 1042 * if the file was recently truncated, we include information about its 1043 * old and new size so that the object can be updated appropriately. (we 1044 * avoid synchronously deleting truncated objects because it's slow.) 1045 */ 1046 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 1047 struct ceph_file_layout *layout, 1048 struct ceph_vino vino, 1049 u64 off, u64 *plen, 1050 unsigned int which, int num_ops, 1051 int opcode, int flags, 1052 struct ceph_snap_context *snapc, 1053 u32 truncate_seq, 1054 u64 truncate_size, 1055 bool use_mempool) 1056 { 1057 struct ceph_osd_request *req; 1058 u64 objnum = 0; 1059 u64 objoff = 0; 1060 u64 objlen = 0; 1061 int r; 1062 1063 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 1064 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 1065 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 1066 1067 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 1068 GFP_NOFS); 1069 if (!req) { 1070 r = -ENOMEM; 1071 goto fail; 1072 } 1073 1074 /* calculate max write size */ 1075 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 1076 if (r) 1077 goto fail; 1078 1079 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 1080 osd_req_op_init(req, which, opcode, 0); 1081 } else { 1082 u32 object_size = layout->object_size; 1083 u32 object_base = off - objoff; 1084 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 1085 if (truncate_size <= object_base) { 1086 truncate_size = 0; 1087 } else { 1088 truncate_size -= object_base; 1089 if (truncate_size > object_size) 1090 truncate_size = object_size; 1091 } 1092 } 1093 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 1094 truncate_size, truncate_seq); 1095 } 1096 1097 req->r_flags = flags; 1098 req->r_base_oloc.pool = layout->pool_id; 1099 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); 1100 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 1101 1102 req->r_snapid = vino.snap; 1103 if (flags & CEPH_OSD_FLAG_WRITE) 1104 req->r_data_offset = off; 1105 1106 if (num_ops > 1) 1107 /* 1108 * This is a special case for ceph_writepages_start(), but it 1109 * also covers ceph_uninline_data(). If more multi-op request 1110 * use cases emerge, we will need a separate helper. 1111 */ 1112 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0); 1113 else 1114 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 1115 if (r) 1116 goto fail; 1117 1118 return req; 1119 1120 fail: 1121 ceph_osdc_put_request(req); 1122 return ERR_PTR(r); 1123 } 1124 EXPORT_SYMBOL(ceph_osdc_new_request); 1125 1126 /* 1127 * We keep osd requests in an rbtree, sorted by ->r_tid. 1128 */ 1129 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 1130 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 1131 1132 /* 1133 * Call @fn on each OSD request as long as @fn returns 0. 1134 */ 1135 static void for_each_request(struct ceph_osd_client *osdc, 1136 int (*fn)(struct ceph_osd_request *req, void *arg), 1137 void *arg) 1138 { 1139 struct rb_node *n, *p; 1140 1141 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 1142 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 1143 1144 for (p = rb_first(&osd->o_requests); p; ) { 1145 struct ceph_osd_request *req = 1146 rb_entry(p, struct ceph_osd_request, r_node); 1147 1148 p = rb_next(p); 1149 if (fn(req, arg)) 1150 return; 1151 } 1152 } 1153 1154 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 1155 struct ceph_osd_request *req = 1156 rb_entry(p, struct ceph_osd_request, r_node); 1157 1158 p = rb_next(p); 1159 if (fn(req, arg)) 1160 return; 1161 } 1162 } 1163 1164 static bool osd_homeless(struct ceph_osd *osd) 1165 { 1166 return osd->o_osd == CEPH_HOMELESS_OSD; 1167 } 1168 1169 static bool osd_registered(struct ceph_osd *osd) 1170 { 1171 verify_osdc_locked(osd->o_osdc); 1172 1173 return !RB_EMPTY_NODE(&osd->o_node); 1174 } 1175 1176 /* 1177 * Assumes @osd is zero-initialized. 1178 */ 1179 static void osd_init(struct ceph_osd *osd) 1180 { 1181 refcount_set(&osd->o_ref, 1); 1182 RB_CLEAR_NODE(&osd->o_node); 1183 osd->o_requests = RB_ROOT; 1184 osd->o_linger_requests = RB_ROOT; 1185 osd->o_backoff_mappings = RB_ROOT; 1186 osd->o_backoffs_by_id = RB_ROOT; 1187 INIT_LIST_HEAD(&osd->o_osd_lru); 1188 INIT_LIST_HEAD(&osd->o_keepalive_item); 1189 osd->o_incarnation = 1; 1190 mutex_init(&osd->lock); 1191 } 1192 1193 static void osd_cleanup(struct ceph_osd *osd) 1194 { 1195 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1196 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1197 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1198 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings)); 1199 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id)); 1200 WARN_ON(!list_empty(&osd->o_osd_lru)); 1201 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1202 1203 if (osd->o_auth.authorizer) { 1204 WARN_ON(osd_homeless(osd)); 1205 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1206 } 1207 } 1208 1209 /* 1210 * Track open sessions with osds. 1211 */ 1212 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1213 { 1214 struct ceph_osd *osd; 1215 1216 WARN_ON(onum == CEPH_HOMELESS_OSD); 1217 1218 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1219 osd_init(osd); 1220 osd->o_osdc = osdc; 1221 osd->o_osd = onum; 1222 1223 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1224 1225 return osd; 1226 } 1227 1228 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1229 { 1230 if (refcount_inc_not_zero(&osd->o_ref)) { 1231 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1, 1232 refcount_read(&osd->o_ref)); 1233 return osd; 1234 } else { 1235 dout("get_osd %p FAIL\n", osd); 1236 return NULL; 1237 } 1238 } 1239 1240 static void put_osd(struct ceph_osd *osd) 1241 { 1242 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref), 1243 refcount_read(&osd->o_ref) - 1); 1244 if (refcount_dec_and_test(&osd->o_ref)) { 1245 osd_cleanup(osd); 1246 kfree(osd); 1247 } 1248 } 1249 1250 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1251 1252 static void __move_osd_to_lru(struct ceph_osd *osd) 1253 { 1254 struct ceph_osd_client *osdc = osd->o_osdc; 1255 1256 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1257 BUG_ON(!list_empty(&osd->o_osd_lru)); 1258 1259 spin_lock(&osdc->osd_lru_lock); 1260 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1261 spin_unlock(&osdc->osd_lru_lock); 1262 1263 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1264 } 1265 1266 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1267 { 1268 if (RB_EMPTY_ROOT(&osd->o_requests) && 1269 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1270 __move_osd_to_lru(osd); 1271 } 1272 1273 static void __remove_osd_from_lru(struct ceph_osd *osd) 1274 { 1275 struct ceph_osd_client *osdc = osd->o_osdc; 1276 1277 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1278 1279 spin_lock(&osdc->osd_lru_lock); 1280 if (!list_empty(&osd->o_osd_lru)) 1281 list_del_init(&osd->o_osd_lru); 1282 spin_unlock(&osdc->osd_lru_lock); 1283 } 1284 1285 /* 1286 * Close the connection and assign any leftover requests to the 1287 * homeless session. 1288 */ 1289 static void close_osd(struct ceph_osd *osd) 1290 { 1291 struct ceph_osd_client *osdc = osd->o_osdc; 1292 struct rb_node *n; 1293 1294 verify_osdc_wrlocked(osdc); 1295 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1296 1297 ceph_con_close(&osd->o_con); 1298 1299 for (n = rb_first(&osd->o_requests); n; ) { 1300 struct ceph_osd_request *req = 1301 rb_entry(n, struct ceph_osd_request, r_node); 1302 1303 n = rb_next(n); /* unlink_request() */ 1304 1305 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1306 unlink_request(osd, req); 1307 link_request(&osdc->homeless_osd, req); 1308 } 1309 for (n = rb_first(&osd->o_linger_requests); n; ) { 1310 struct ceph_osd_linger_request *lreq = 1311 rb_entry(n, struct ceph_osd_linger_request, node); 1312 1313 n = rb_next(n); /* unlink_linger() */ 1314 1315 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1316 lreq->linger_id); 1317 unlink_linger(osd, lreq); 1318 link_linger(&osdc->homeless_osd, lreq); 1319 } 1320 clear_backoffs(osd); 1321 1322 __remove_osd_from_lru(osd); 1323 erase_osd(&osdc->osds, osd); 1324 put_osd(osd); 1325 } 1326 1327 /* 1328 * reset osd connect 1329 */ 1330 static int reopen_osd(struct ceph_osd *osd) 1331 { 1332 struct ceph_entity_addr *peer_addr; 1333 1334 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1335 1336 if (RB_EMPTY_ROOT(&osd->o_requests) && 1337 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1338 close_osd(osd); 1339 return -ENODEV; 1340 } 1341 1342 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1343 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1344 !ceph_con_opened(&osd->o_con)) { 1345 struct rb_node *n; 1346 1347 dout("osd addr hasn't changed and connection never opened, " 1348 "letting msgr retry\n"); 1349 /* touch each r_stamp for handle_timeout()'s benfit */ 1350 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1351 struct ceph_osd_request *req = 1352 rb_entry(n, struct ceph_osd_request, r_node); 1353 req->r_stamp = jiffies; 1354 } 1355 1356 return -EAGAIN; 1357 } 1358 1359 ceph_con_close(&osd->o_con); 1360 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1361 osd->o_incarnation++; 1362 1363 return 0; 1364 } 1365 1366 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1367 bool wrlocked) 1368 { 1369 struct ceph_osd *osd; 1370 1371 if (wrlocked) 1372 verify_osdc_wrlocked(osdc); 1373 else 1374 verify_osdc_locked(osdc); 1375 1376 if (o != CEPH_HOMELESS_OSD) 1377 osd = lookup_osd(&osdc->osds, o); 1378 else 1379 osd = &osdc->homeless_osd; 1380 if (!osd) { 1381 if (!wrlocked) 1382 return ERR_PTR(-EAGAIN); 1383 1384 osd = create_osd(osdc, o); 1385 insert_osd(&osdc->osds, osd); 1386 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1387 &osdc->osdmap->osd_addr[osd->o_osd]); 1388 } 1389 1390 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1391 return osd; 1392 } 1393 1394 /* 1395 * Create request <-> OSD session relation. 1396 * 1397 * @req has to be assigned a tid, @osd may be homeless. 1398 */ 1399 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1400 { 1401 verify_osd_locked(osd); 1402 WARN_ON(!req->r_tid || req->r_osd); 1403 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1404 req, req->r_tid); 1405 1406 if (!osd_homeless(osd)) 1407 __remove_osd_from_lru(osd); 1408 else 1409 atomic_inc(&osd->o_osdc->num_homeless); 1410 1411 get_osd(osd); 1412 insert_request(&osd->o_requests, req); 1413 req->r_osd = osd; 1414 } 1415 1416 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1417 { 1418 verify_osd_locked(osd); 1419 WARN_ON(req->r_osd != osd); 1420 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1421 req, req->r_tid); 1422 1423 req->r_osd = NULL; 1424 erase_request(&osd->o_requests, req); 1425 put_osd(osd); 1426 1427 if (!osd_homeless(osd)) 1428 maybe_move_osd_to_lru(osd); 1429 else 1430 atomic_dec(&osd->o_osdc->num_homeless); 1431 } 1432 1433 static bool __pool_full(struct ceph_pg_pool_info *pi) 1434 { 1435 return pi->flags & CEPH_POOL_FLAG_FULL; 1436 } 1437 1438 static bool have_pool_full(struct ceph_osd_client *osdc) 1439 { 1440 struct rb_node *n; 1441 1442 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1443 struct ceph_pg_pool_info *pi = 1444 rb_entry(n, struct ceph_pg_pool_info, node); 1445 1446 if (__pool_full(pi)) 1447 return true; 1448 } 1449 1450 return false; 1451 } 1452 1453 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1454 { 1455 struct ceph_pg_pool_info *pi; 1456 1457 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1458 if (!pi) 1459 return false; 1460 1461 return __pool_full(pi); 1462 } 1463 1464 /* 1465 * Returns whether a request should be blocked from being sent 1466 * based on the current osdmap and osd_client settings. 1467 */ 1468 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1469 const struct ceph_osd_request_target *t, 1470 struct ceph_pg_pool_info *pi) 1471 { 1472 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1473 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1474 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1475 __pool_full(pi); 1476 1477 WARN_ON(pi->id != t->target_oloc.pool); 1478 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) || 1479 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) || 1480 (osdc->osdmap->epoch < osdc->epoch_barrier); 1481 } 1482 1483 enum calc_target_result { 1484 CALC_TARGET_NO_ACTION = 0, 1485 CALC_TARGET_NEED_RESEND, 1486 CALC_TARGET_POOL_DNE, 1487 }; 1488 1489 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1490 struct ceph_osd_request_target *t, 1491 struct ceph_connection *con, 1492 bool any_change) 1493 { 1494 struct ceph_pg_pool_info *pi; 1495 struct ceph_pg pgid, last_pgid; 1496 struct ceph_osds up, acting; 1497 bool force_resend = false; 1498 bool unpaused = false; 1499 bool legacy_change; 1500 bool split = false; 1501 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1502 bool recovery_deletes = ceph_osdmap_flag(osdc, 1503 CEPH_OSDMAP_RECOVERY_DELETES); 1504 enum calc_target_result ct_res; 1505 1506 t->epoch = osdc->osdmap->epoch; 1507 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1508 if (!pi) { 1509 t->osd = CEPH_HOMELESS_OSD; 1510 ct_res = CALC_TARGET_POOL_DNE; 1511 goto out; 1512 } 1513 1514 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1515 if (t->last_force_resend < pi->last_force_request_resend) { 1516 t->last_force_resend = pi->last_force_request_resend; 1517 force_resend = true; 1518 } else if (t->last_force_resend == 0) { 1519 force_resend = true; 1520 } 1521 } 1522 1523 /* apply tiering */ 1524 ceph_oid_copy(&t->target_oid, &t->base_oid); 1525 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1526 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1527 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) 1528 t->target_oloc.pool = pi->read_tier; 1529 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) 1530 t->target_oloc.pool = pi->write_tier; 1531 1532 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool); 1533 if (!pi) { 1534 t->osd = CEPH_HOMELESS_OSD; 1535 ct_res = CALC_TARGET_POOL_DNE; 1536 goto out; 1537 } 1538 } 1539 1540 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid); 1541 last_pgid.pool = pgid.pool; 1542 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1543 1544 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting); 1545 if (any_change && 1546 ceph_is_new_interval(&t->acting, 1547 &acting, 1548 &t->up, 1549 &up, 1550 t->size, 1551 pi->size, 1552 t->min_size, 1553 pi->min_size, 1554 t->pg_num, 1555 pi->pg_num, 1556 t->sort_bitwise, 1557 sort_bitwise, 1558 t->recovery_deletes, 1559 recovery_deletes, 1560 &last_pgid)) 1561 force_resend = true; 1562 1563 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1564 t->paused = false; 1565 unpaused = true; 1566 } 1567 legacy_change = ceph_pg_compare(&t->pgid, &pgid) || 1568 ceph_osds_changed(&t->acting, &acting, any_change); 1569 if (t->pg_num) 1570 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num); 1571 1572 if (legacy_change || force_resend || split) { 1573 t->pgid = pgid; /* struct */ 1574 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid); 1575 ceph_osds_copy(&t->acting, &acting); 1576 ceph_osds_copy(&t->up, &up); 1577 t->size = pi->size; 1578 t->min_size = pi->min_size; 1579 t->pg_num = pi->pg_num; 1580 t->pg_num_mask = pi->pg_num_mask; 1581 t->sort_bitwise = sort_bitwise; 1582 t->recovery_deletes = recovery_deletes; 1583 1584 t->osd = acting.primary; 1585 } 1586 1587 if (unpaused || legacy_change || force_resend || 1588 (split && con && CEPH_HAVE_FEATURE(con->peer_features, 1589 RESEND_ON_SPLIT))) 1590 ct_res = CALC_TARGET_NEED_RESEND; 1591 else 1592 ct_res = CALC_TARGET_NO_ACTION; 1593 1594 out: 1595 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd); 1596 return ct_res; 1597 } 1598 1599 static struct ceph_spg_mapping *alloc_spg_mapping(void) 1600 { 1601 struct ceph_spg_mapping *spg; 1602 1603 spg = kmalloc(sizeof(*spg), GFP_NOIO); 1604 if (!spg) 1605 return NULL; 1606 1607 RB_CLEAR_NODE(&spg->node); 1608 spg->backoffs = RB_ROOT; 1609 return spg; 1610 } 1611 1612 static void free_spg_mapping(struct ceph_spg_mapping *spg) 1613 { 1614 WARN_ON(!RB_EMPTY_NODE(&spg->node)); 1615 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs)); 1616 1617 kfree(spg); 1618 } 1619 1620 /* 1621 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to 1622 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is 1623 * defined only within a specific spgid; it does not pass anything to 1624 * children on split, or to another primary. 1625 */ 1626 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare, 1627 RB_BYPTR, const struct ceph_spg *, node) 1628 1629 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid) 1630 { 1631 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits; 1632 } 1633 1634 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid, 1635 void **pkey, size_t *pkey_len) 1636 { 1637 if (hoid->key_len) { 1638 *pkey = hoid->key; 1639 *pkey_len = hoid->key_len; 1640 } else { 1641 *pkey = hoid->oid; 1642 *pkey_len = hoid->oid_len; 1643 } 1644 } 1645 1646 static int compare_names(const void *name1, size_t name1_len, 1647 const void *name2, size_t name2_len) 1648 { 1649 int ret; 1650 1651 ret = memcmp(name1, name2, min(name1_len, name2_len)); 1652 if (!ret) { 1653 if (name1_len < name2_len) 1654 ret = -1; 1655 else if (name1_len > name2_len) 1656 ret = 1; 1657 } 1658 return ret; 1659 } 1660 1661 static int hoid_compare(const struct ceph_hobject_id *lhs, 1662 const struct ceph_hobject_id *rhs) 1663 { 1664 void *effective_key1, *effective_key2; 1665 size_t effective_key1_len, effective_key2_len; 1666 int ret; 1667 1668 if (lhs->is_max < rhs->is_max) 1669 return -1; 1670 if (lhs->is_max > rhs->is_max) 1671 return 1; 1672 1673 if (lhs->pool < rhs->pool) 1674 return -1; 1675 if (lhs->pool > rhs->pool) 1676 return 1; 1677 1678 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs)) 1679 return -1; 1680 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs)) 1681 return 1; 1682 1683 ret = compare_names(lhs->nspace, lhs->nspace_len, 1684 rhs->nspace, rhs->nspace_len); 1685 if (ret) 1686 return ret; 1687 1688 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len); 1689 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len); 1690 ret = compare_names(effective_key1, effective_key1_len, 1691 effective_key2, effective_key2_len); 1692 if (ret) 1693 return ret; 1694 1695 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len); 1696 if (ret) 1697 return ret; 1698 1699 if (lhs->snapid < rhs->snapid) 1700 return -1; 1701 if (lhs->snapid > rhs->snapid) 1702 return 1; 1703 1704 return 0; 1705 } 1706 1707 /* 1708 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX 1709 * compat stuff here. 1710 * 1711 * Assumes @hoid is zero-initialized. 1712 */ 1713 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid) 1714 { 1715 u8 struct_v; 1716 u32 struct_len; 1717 int ret; 1718 1719 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v, 1720 &struct_len); 1721 if (ret) 1722 return ret; 1723 1724 if (struct_v < 4) { 1725 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v); 1726 goto e_inval; 1727 } 1728 1729 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len, 1730 GFP_NOIO); 1731 if (IS_ERR(hoid->key)) { 1732 ret = PTR_ERR(hoid->key); 1733 hoid->key = NULL; 1734 return ret; 1735 } 1736 1737 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len, 1738 GFP_NOIO); 1739 if (IS_ERR(hoid->oid)) { 1740 ret = PTR_ERR(hoid->oid); 1741 hoid->oid = NULL; 1742 return ret; 1743 } 1744 1745 ceph_decode_64_safe(p, end, hoid->snapid, e_inval); 1746 ceph_decode_32_safe(p, end, hoid->hash, e_inval); 1747 ceph_decode_8_safe(p, end, hoid->is_max, e_inval); 1748 1749 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len, 1750 GFP_NOIO); 1751 if (IS_ERR(hoid->nspace)) { 1752 ret = PTR_ERR(hoid->nspace); 1753 hoid->nspace = NULL; 1754 return ret; 1755 } 1756 1757 ceph_decode_64_safe(p, end, hoid->pool, e_inval); 1758 1759 ceph_hoid_build_hash_cache(hoid); 1760 return 0; 1761 1762 e_inval: 1763 return -EINVAL; 1764 } 1765 1766 static int hoid_encoding_size(const struct ceph_hobject_id *hoid) 1767 { 1768 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */ 1769 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len; 1770 } 1771 1772 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid) 1773 { 1774 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid)); 1775 ceph_encode_string(p, end, hoid->key, hoid->key_len); 1776 ceph_encode_string(p, end, hoid->oid, hoid->oid_len); 1777 ceph_encode_64(p, hoid->snapid); 1778 ceph_encode_32(p, hoid->hash); 1779 ceph_encode_8(p, hoid->is_max); 1780 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len); 1781 ceph_encode_64(p, hoid->pool); 1782 } 1783 1784 static void free_hoid(struct ceph_hobject_id *hoid) 1785 { 1786 if (hoid) { 1787 kfree(hoid->key); 1788 kfree(hoid->oid); 1789 kfree(hoid->nspace); 1790 kfree(hoid); 1791 } 1792 } 1793 1794 static struct ceph_osd_backoff *alloc_backoff(void) 1795 { 1796 struct ceph_osd_backoff *backoff; 1797 1798 backoff = kzalloc(sizeof(*backoff), GFP_NOIO); 1799 if (!backoff) 1800 return NULL; 1801 1802 RB_CLEAR_NODE(&backoff->spg_node); 1803 RB_CLEAR_NODE(&backoff->id_node); 1804 return backoff; 1805 } 1806 1807 static void free_backoff(struct ceph_osd_backoff *backoff) 1808 { 1809 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node)); 1810 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node)); 1811 1812 free_hoid(backoff->begin); 1813 free_hoid(backoff->end); 1814 kfree(backoff); 1815 } 1816 1817 /* 1818 * Within a specific spgid, backoffs are managed by ->begin hoid. 1819 */ 1820 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare, 1821 RB_BYVAL, spg_node); 1822 1823 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root, 1824 const struct ceph_hobject_id *hoid) 1825 { 1826 struct rb_node *n = root->rb_node; 1827 1828 while (n) { 1829 struct ceph_osd_backoff *cur = 1830 rb_entry(n, struct ceph_osd_backoff, spg_node); 1831 int cmp; 1832 1833 cmp = hoid_compare(hoid, cur->begin); 1834 if (cmp < 0) { 1835 n = n->rb_left; 1836 } else if (cmp > 0) { 1837 if (hoid_compare(hoid, cur->end) < 0) 1838 return cur; 1839 1840 n = n->rb_right; 1841 } else { 1842 return cur; 1843 } 1844 } 1845 1846 return NULL; 1847 } 1848 1849 /* 1850 * Each backoff has a unique id within its OSD session. 1851 */ 1852 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node) 1853 1854 static void clear_backoffs(struct ceph_osd *osd) 1855 { 1856 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) { 1857 struct ceph_spg_mapping *spg = 1858 rb_entry(rb_first(&osd->o_backoff_mappings), 1859 struct ceph_spg_mapping, node); 1860 1861 while (!RB_EMPTY_ROOT(&spg->backoffs)) { 1862 struct ceph_osd_backoff *backoff = 1863 rb_entry(rb_first(&spg->backoffs), 1864 struct ceph_osd_backoff, spg_node); 1865 1866 erase_backoff(&spg->backoffs, backoff); 1867 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 1868 free_backoff(backoff); 1869 } 1870 erase_spg_mapping(&osd->o_backoff_mappings, spg); 1871 free_spg_mapping(spg); 1872 } 1873 } 1874 1875 /* 1876 * Set up a temporary, non-owning view into @t. 1877 */ 1878 static void hoid_fill_from_target(struct ceph_hobject_id *hoid, 1879 const struct ceph_osd_request_target *t) 1880 { 1881 hoid->key = NULL; 1882 hoid->key_len = 0; 1883 hoid->oid = t->target_oid.name; 1884 hoid->oid_len = t->target_oid.name_len; 1885 hoid->snapid = CEPH_NOSNAP; 1886 hoid->hash = t->pgid.seed; 1887 hoid->is_max = false; 1888 if (t->target_oloc.pool_ns) { 1889 hoid->nspace = t->target_oloc.pool_ns->str; 1890 hoid->nspace_len = t->target_oloc.pool_ns->len; 1891 } else { 1892 hoid->nspace = NULL; 1893 hoid->nspace_len = 0; 1894 } 1895 hoid->pool = t->target_oloc.pool; 1896 ceph_hoid_build_hash_cache(hoid); 1897 } 1898 1899 static bool should_plug_request(struct ceph_osd_request *req) 1900 { 1901 struct ceph_osd *osd = req->r_osd; 1902 struct ceph_spg_mapping *spg; 1903 struct ceph_osd_backoff *backoff; 1904 struct ceph_hobject_id hoid; 1905 1906 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid); 1907 if (!spg) 1908 return false; 1909 1910 hoid_fill_from_target(&hoid, &req->r_t); 1911 backoff = lookup_containing_backoff(&spg->backoffs, &hoid); 1912 if (!backoff) 1913 return false; 1914 1915 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n", 1916 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool, 1917 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id); 1918 return true; 1919 } 1920 1921 /* 1922 * Keep get_num_data_items() in sync with this function. 1923 */ 1924 static void setup_request_data(struct ceph_osd_request *req) 1925 { 1926 struct ceph_msg *request_msg = req->r_request; 1927 struct ceph_msg *reply_msg = req->r_reply; 1928 struct ceph_osd_req_op *op; 1929 1930 if (req->r_request->num_data_items || req->r_reply->num_data_items) 1931 return; 1932 1933 WARN_ON(request_msg->data_length || reply_msg->data_length); 1934 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { 1935 switch (op->op) { 1936 /* request */ 1937 case CEPH_OSD_OP_WRITE: 1938 case CEPH_OSD_OP_WRITEFULL: 1939 WARN_ON(op->indata_len != op->extent.length); 1940 ceph_osdc_msg_data_add(request_msg, 1941 &op->extent.osd_data); 1942 break; 1943 case CEPH_OSD_OP_SETXATTR: 1944 case CEPH_OSD_OP_CMPXATTR: 1945 WARN_ON(op->indata_len != op->xattr.name_len + 1946 op->xattr.value_len); 1947 ceph_osdc_msg_data_add(request_msg, 1948 &op->xattr.osd_data); 1949 break; 1950 case CEPH_OSD_OP_NOTIFY_ACK: 1951 ceph_osdc_msg_data_add(request_msg, 1952 &op->notify_ack.request_data); 1953 break; 1954 case CEPH_OSD_OP_COPY_FROM: 1955 ceph_osdc_msg_data_add(request_msg, 1956 &op->copy_from.osd_data); 1957 break; 1958 1959 /* reply */ 1960 case CEPH_OSD_OP_STAT: 1961 ceph_osdc_msg_data_add(reply_msg, 1962 &op->raw_data_in); 1963 break; 1964 case CEPH_OSD_OP_READ: 1965 ceph_osdc_msg_data_add(reply_msg, 1966 &op->extent.osd_data); 1967 break; 1968 case CEPH_OSD_OP_LIST_WATCHERS: 1969 ceph_osdc_msg_data_add(reply_msg, 1970 &op->list_watchers.response_data); 1971 break; 1972 1973 /* both */ 1974 case CEPH_OSD_OP_CALL: 1975 WARN_ON(op->indata_len != op->cls.class_len + 1976 op->cls.method_len + 1977 op->cls.indata_len); 1978 ceph_osdc_msg_data_add(request_msg, 1979 &op->cls.request_info); 1980 /* optional, can be NONE */ 1981 ceph_osdc_msg_data_add(request_msg, 1982 &op->cls.request_data); 1983 /* optional, can be NONE */ 1984 ceph_osdc_msg_data_add(reply_msg, 1985 &op->cls.response_data); 1986 break; 1987 case CEPH_OSD_OP_NOTIFY: 1988 ceph_osdc_msg_data_add(request_msg, 1989 &op->notify.request_data); 1990 ceph_osdc_msg_data_add(reply_msg, 1991 &op->notify.response_data); 1992 break; 1993 } 1994 } 1995 } 1996 1997 static void encode_pgid(void **p, const struct ceph_pg *pgid) 1998 { 1999 ceph_encode_8(p, 1); 2000 ceph_encode_64(p, pgid->pool); 2001 ceph_encode_32(p, pgid->seed); 2002 ceph_encode_32(p, -1); /* preferred */ 2003 } 2004 2005 static void encode_spgid(void **p, const struct ceph_spg *spgid) 2006 { 2007 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1); 2008 encode_pgid(p, &spgid->pgid); 2009 ceph_encode_8(p, spgid->shard); 2010 } 2011 2012 static void encode_oloc(void **p, void *end, 2013 const struct ceph_object_locator *oloc) 2014 { 2015 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc)); 2016 ceph_encode_64(p, oloc->pool); 2017 ceph_encode_32(p, -1); /* preferred */ 2018 ceph_encode_32(p, 0); /* key len */ 2019 if (oloc->pool_ns) 2020 ceph_encode_string(p, end, oloc->pool_ns->str, 2021 oloc->pool_ns->len); 2022 else 2023 ceph_encode_32(p, 0); 2024 } 2025 2026 static void encode_request_partial(struct ceph_osd_request *req, 2027 struct ceph_msg *msg) 2028 { 2029 void *p = msg->front.iov_base; 2030 void *const end = p + msg->front_alloc_len; 2031 u32 data_len = 0; 2032 int i; 2033 2034 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 2035 /* snapshots aren't writeable */ 2036 WARN_ON(req->r_snapid != CEPH_NOSNAP); 2037 } else { 2038 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 2039 req->r_data_offset || req->r_snapc); 2040 } 2041 2042 setup_request_data(req); 2043 2044 encode_spgid(&p, &req->r_t.spgid); /* actual spg */ 2045 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */ 2046 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 2047 ceph_encode_32(&p, req->r_flags); 2048 2049 /* reqid */ 2050 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid)); 2051 memset(p, 0, sizeof(struct ceph_osd_reqid)); 2052 p += sizeof(struct ceph_osd_reqid); 2053 2054 /* trace */ 2055 memset(p, 0, sizeof(struct ceph_blkin_trace_info)); 2056 p += sizeof(struct ceph_blkin_trace_info); 2057 2058 ceph_encode_32(&p, 0); /* client_inc, always 0 */ 2059 ceph_encode_timespec64(p, &req->r_mtime); 2060 p += sizeof(struct ceph_timespec); 2061 2062 encode_oloc(&p, end, &req->r_t.target_oloc); 2063 ceph_encode_string(&p, end, req->r_t.target_oid.name, 2064 req->r_t.target_oid.name_len); 2065 2066 /* ops, can imply data */ 2067 ceph_encode_16(&p, req->r_num_ops); 2068 for (i = 0; i < req->r_num_ops; i++) { 2069 data_len += osd_req_encode_op(p, &req->r_ops[i]); 2070 p += sizeof(struct ceph_osd_op); 2071 } 2072 2073 ceph_encode_64(&p, req->r_snapid); /* snapid */ 2074 if (req->r_snapc) { 2075 ceph_encode_64(&p, req->r_snapc->seq); 2076 ceph_encode_32(&p, req->r_snapc->num_snaps); 2077 for (i = 0; i < req->r_snapc->num_snaps; i++) 2078 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2079 } else { 2080 ceph_encode_64(&p, 0); /* snap_seq */ 2081 ceph_encode_32(&p, 0); /* snaps len */ 2082 } 2083 2084 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 2085 BUG_ON(p > end - 8); /* space for features */ 2086 2087 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */ 2088 /* front_len is finalized in encode_request_finish() */ 2089 msg->front.iov_len = p - msg->front.iov_base; 2090 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2091 msg->hdr.data_len = cpu_to_le32(data_len); 2092 /* 2093 * The header "data_off" is a hint to the receiver allowing it 2094 * to align received data into its buffers such that there's no 2095 * need to re-copy it before writing it to disk (direct I/O). 2096 */ 2097 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 2098 2099 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg, 2100 req->r_t.target_oid.name, req->r_t.target_oid.name_len); 2101 } 2102 2103 static void encode_request_finish(struct ceph_msg *msg) 2104 { 2105 void *p = msg->front.iov_base; 2106 void *const partial_end = p + msg->front.iov_len; 2107 void *const end = p + msg->front_alloc_len; 2108 2109 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) { 2110 /* luminous OSD -- encode features and be done */ 2111 p = partial_end; 2112 ceph_encode_64(&p, msg->con->peer_features); 2113 } else { 2114 struct { 2115 char spgid[CEPH_ENCODING_START_BLK_LEN + 2116 CEPH_PGID_ENCODING_LEN + 1]; 2117 __le32 hash; 2118 __le32 epoch; 2119 __le32 flags; 2120 char reqid[CEPH_ENCODING_START_BLK_LEN + 2121 sizeof(struct ceph_osd_reqid)]; 2122 char trace[sizeof(struct ceph_blkin_trace_info)]; 2123 __le32 client_inc; 2124 struct ceph_timespec mtime; 2125 } __packed head; 2126 struct ceph_pg pgid; 2127 void *oloc, *oid, *tail; 2128 int oloc_len, oid_len, tail_len; 2129 int len; 2130 2131 /* 2132 * Pre-luminous OSD -- reencode v8 into v4 using @head 2133 * as a temporary buffer. Encode the raw PG; the rest 2134 * is just a matter of moving oloc, oid and tail blobs 2135 * around. 2136 */ 2137 memcpy(&head, p, sizeof(head)); 2138 p += sizeof(head); 2139 2140 oloc = p; 2141 p += CEPH_ENCODING_START_BLK_LEN; 2142 pgid.pool = ceph_decode_64(&p); 2143 p += 4 + 4; /* preferred, key len */ 2144 len = ceph_decode_32(&p); 2145 p += len; /* nspace */ 2146 oloc_len = p - oloc; 2147 2148 oid = p; 2149 len = ceph_decode_32(&p); 2150 p += len; 2151 oid_len = p - oid; 2152 2153 tail = p; 2154 tail_len = partial_end - p; 2155 2156 p = msg->front.iov_base; 2157 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc)); 2158 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch)); 2159 ceph_encode_copy(&p, &head.flags, sizeof(head.flags)); 2160 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime)); 2161 2162 /* reassert_version */ 2163 memset(p, 0, sizeof(struct ceph_eversion)); 2164 p += sizeof(struct ceph_eversion); 2165 2166 BUG_ON(p >= oloc); 2167 memmove(p, oloc, oloc_len); 2168 p += oloc_len; 2169 2170 pgid.seed = le32_to_cpu(head.hash); 2171 encode_pgid(&p, &pgid); /* raw pg */ 2172 2173 BUG_ON(p >= oid); 2174 memmove(p, oid, oid_len); 2175 p += oid_len; 2176 2177 /* tail -- ops, snapid, snapc, retry_attempt */ 2178 BUG_ON(p >= tail); 2179 memmove(p, tail, tail_len); 2180 p += tail_len; 2181 2182 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 2183 } 2184 2185 BUG_ON(p > end); 2186 msg->front.iov_len = p - msg->front.iov_base; 2187 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2188 2189 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg, 2190 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len), 2191 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len), 2192 le16_to_cpu(msg->hdr.version)); 2193 } 2194 2195 /* 2196 * @req has to be assigned a tid and registered. 2197 */ 2198 static void send_request(struct ceph_osd_request *req) 2199 { 2200 struct ceph_osd *osd = req->r_osd; 2201 2202 verify_osd_locked(osd); 2203 WARN_ON(osd->o_osd != req->r_t.osd); 2204 2205 /* backoff? */ 2206 if (should_plug_request(req)) 2207 return; 2208 2209 /* 2210 * We may have a previously queued request message hanging 2211 * around. Cancel it to avoid corrupting the msgr. 2212 */ 2213 if (req->r_sent) 2214 ceph_msg_revoke(req->r_request); 2215 2216 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 2217 if (req->r_attempts) 2218 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2219 else 2220 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 2221 2222 encode_request_partial(req, req->r_request); 2223 2224 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n", 2225 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 2226 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed, 2227 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags, 2228 req->r_attempts); 2229 2230 req->r_t.paused = false; 2231 req->r_stamp = jiffies; 2232 req->r_attempts++; 2233 2234 req->r_sent = osd->o_incarnation; 2235 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 2236 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 2237 } 2238 2239 static void maybe_request_map(struct ceph_osd_client *osdc) 2240 { 2241 bool continuous = false; 2242 2243 verify_osdc_locked(osdc); 2244 WARN_ON(!osdc->osdmap->epoch); 2245 2246 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2247 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 2248 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2249 dout("%s osdc %p continuous\n", __func__, osdc); 2250 continuous = true; 2251 } else { 2252 dout("%s osdc %p onetime\n", __func__, osdc); 2253 } 2254 2255 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 2256 osdc->osdmap->epoch + 1, continuous)) 2257 ceph_monc_renew_subs(&osdc->client->monc); 2258 } 2259 2260 static void complete_request(struct ceph_osd_request *req, int err); 2261 static void send_map_check(struct ceph_osd_request *req); 2262 2263 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 2264 { 2265 struct ceph_osd_client *osdc = req->r_osdc; 2266 struct ceph_osd *osd; 2267 enum calc_target_result ct_res; 2268 int err = 0; 2269 bool need_send = false; 2270 bool promoted = false; 2271 2272 WARN_ON(req->r_tid); 2273 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 2274 2275 again: 2276 ct_res = calc_target(osdc, &req->r_t, NULL, false); 2277 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 2278 goto promote; 2279 2280 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 2281 if (IS_ERR(osd)) { 2282 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 2283 goto promote; 2284 } 2285 2286 if (osdc->abort_err) { 2287 dout("req %p abort_err %d\n", req, osdc->abort_err); 2288 err = osdc->abort_err; 2289 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) { 2290 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch, 2291 osdc->epoch_barrier); 2292 req->r_t.paused = true; 2293 maybe_request_map(osdc); 2294 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2295 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2296 dout("req %p pausewr\n", req); 2297 req->r_t.paused = true; 2298 maybe_request_map(osdc); 2299 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 2300 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2301 dout("req %p pauserd\n", req); 2302 req->r_t.paused = true; 2303 maybe_request_map(osdc); 2304 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2305 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 2306 CEPH_OSD_FLAG_FULL_FORCE)) && 2307 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2308 pool_full(osdc, req->r_t.base_oloc.pool))) { 2309 dout("req %p full/pool_full\n", req); 2310 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) { 2311 err = -ENOSPC; 2312 } else { 2313 pr_warn_ratelimited("FULL or reached pool quota\n"); 2314 req->r_t.paused = true; 2315 maybe_request_map(osdc); 2316 } 2317 } else if (!osd_homeless(osd)) { 2318 need_send = true; 2319 } else { 2320 maybe_request_map(osdc); 2321 } 2322 2323 mutex_lock(&osd->lock); 2324 /* 2325 * Assign the tid atomically with send_request() to protect 2326 * multiple writes to the same object from racing with each 2327 * other, resulting in out of order ops on the OSDs. 2328 */ 2329 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2330 link_request(osd, req); 2331 if (need_send) 2332 send_request(req); 2333 else if (err) 2334 complete_request(req, err); 2335 mutex_unlock(&osd->lock); 2336 2337 if (!err && ct_res == CALC_TARGET_POOL_DNE) 2338 send_map_check(req); 2339 2340 if (promoted) 2341 downgrade_write(&osdc->lock); 2342 return; 2343 2344 promote: 2345 up_read(&osdc->lock); 2346 down_write(&osdc->lock); 2347 wrlocked = true; 2348 promoted = true; 2349 goto again; 2350 } 2351 2352 static void account_request(struct ceph_osd_request *req) 2353 { 2354 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK)); 2355 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE))); 2356 2357 req->r_flags |= CEPH_OSD_FLAG_ONDISK; 2358 atomic_inc(&req->r_osdc->num_requests); 2359 2360 req->r_start_stamp = jiffies; 2361 } 2362 2363 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 2364 { 2365 ceph_osdc_get_request(req); 2366 account_request(req); 2367 __submit_request(req, wrlocked); 2368 } 2369 2370 static void finish_request(struct ceph_osd_request *req) 2371 { 2372 struct ceph_osd_client *osdc = req->r_osdc; 2373 2374 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 2375 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2376 2377 if (req->r_osd) 2378 unlink_request(req->r_osd, req); 2379 atomic_dec(&osdc->num_requests); 2380 2381 /* 2382 * If an OSD has failed or returned and a request has been sent 2383 * twice, it's possible to get a reply and end up here while the 2384 * request message is queued for delivery. We will ignore the 2385 * reply, so not a big deal, but better to try and catch it. 2386 */ 2387 ceph_msg_revoke(req->r_request); 2388 ceph_msg_revoke_incoming(req->r_reply); 2389 } 2390 2391 static void __complete_request(struct ceph_osd_request *req) 2392 { 2393 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req, 2394 req->r_tid, req->r_callback, req->r_result); 2395 2396 if (req->r_callback) 2397 req->r_callback(req); 2398 complete_all(&req->r_completion); 2399 ceph_osdc_put_request(req); 2400 } 2401 2402 static void complete_request_workfn(struct work_struct *work) 2403 { 2404 struct ceph_osd_request *req = 2405 container_of(work, struct ceph_osd_request, r_complete_work); 2406 2407 __complete_request(req); 2408 } 2409 2410 /* 2411 * This is open-coded in handle_reply(). 2412 */ 2413 static void complete_request(struct ceph_osd_request *req, int err) 2414 { 2415 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2416 2417 req->r_result = err; 2418 finish_request(req); 2419 2420 INIT_WORK(&req->r_complete_work, complete_request_workfn); 2421 queue_work(req->r_osdc->completion_wq, &req->r_complete_work); 2422 } 2423 2424 static void cancel_map_check(struct ceph_osd_request *req) 2425 { 2426 struct ceph_osd_client *osdc = req->r_osdc; 2427 struct ceph_osd_request *lookup_req; 2428 2429 verify_osdc_wrlocked(osdc); 2430 2431 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2432 if (!lookup_req) 2433 return; 2434 2435 WARN_ON(lookup_req != req); 2436 erase_request_mc(&osdc->map_checks, req); 2437 ceph_osdc_put_request(req); 2438 } 2439 2440 static void cancel_request(struct ceph_osd_request *req) 2441 { 2442 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2443 2444 cancel_map_check(req); 2445 finish_request(req); 2446 complete_all(&req->r_completion); 2447 ceph_osdc_put_request(req); 2448 } 2449 2450 static void abort_request(struct ceph_osd_request *req, int err) 2451 { 2452 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2453 2454 cancel_map_check(req); 2455 complete_request(req, err); 2456 } 2457 2458 static int abort_fn(struct ceph_osd_request *req, void *arg) 2459 { 2460 int err = *(int *)arg; 2461 2462 abort_request(req, err); 2463 return 0; /* continue iteration */ 2464 } 2465 2466 /* 2467 * Abort all in-flight requests with @err and arrange for all future 2468 * requests to be failed immediately. 2469 */ 2470 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err) 2471 { 2472 dout("%s osdc %p err %d\n", __func__, osdc, err); 2473 down_write(&osdc->lock); 2474 for_each_request(osdc, abort_fn, &err); 2475 osdc->abort_err = err; 2476 up_write(&osdc->lock); 2477 } 2478 EXPORT_SYMBOL(ceph_osdc_abort_requests); 2479 2480 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2481 { 2482 if (likely(eb > osdc->epoch_barrier)) { 2483 dout("updating epoch_barrier from %u to %u\n", 2484 osdc->epoch_barrier, eb); 2485 osdc->epoch_barrier = eb; 2486 /* Request map if we're not to the barrier yet */ 2487 if (eb > osdc->osdmap->epoch) 2488 maybe_request_map(osdc); 2489 } 2490 } 2491 2492 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2493 { 2494 down_read(&osdc->lock); 2495 if (unlikely(eb > osdc->epoch_barrier)) { 2496 up_read(&osdc->lock); 2497 down_write(&osdc->lock); 2498 update_epoch_barrier(osdc, eb); 2499 up_write(&osdc->lock); 2500 } else { 2501 up_read(&osdc->lock); 2502 } 2503 } 2504 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier); 2505 2506 /* 2507 * We can end up releasing caps as a result of abort_request(). 2508 * In that case, we probably want to ensure that the cap release message 2509 * has an updated epoch barrier in it, so set the epoch barrier prior to 2510 * aborting the first request. 2511 */ 2512 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg) 2513 { 2514 struct ceph_osd_client *osdc = req->r_osdc; 2515 bool *victims = arg; 2516 2517 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2518 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2519 pool_full(osdc, req->r_t.base_oloc.pool))) { 2520 if (!*victims) { 2521 update_epoch_barrier(osdc, osdc->osdmap->epoch); 2522 *victims = true; 2523 } 2524 abort_request(req, -ENOSPC); 2525 } 2526 2527 return 0; /* continue iteration */ 2528 } 2529 2530 /* 2531 * Drop all pending requests that are stalled waiting on a full condition to 2532 * clear, and complete them with ENOSPC as the return code. Set the 2533 * osdc->epoch_barrier to the latest map epoch that we've seen if any were 2534 * cancelled. 2535 */ 2536 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc) 2537 { 2538 bool victims = false; 2539 2540 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) && 2541 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc))) 2542 for_each_request(osdc, abort_on_full_fn, &victims); 2543 } 2544 2545 static void check_pool_dne(struct ceph_osd_request *req) 2546 { 2547 struct ceph_osd_client *osdc = req->r_osdc; 2548 struct ceph_osdmap *map = osdc->osdmap; 2549 2550 verify_osdc_wrlocked(osdc); 2551 WARN_ON(!map->epoch); 2552 2553 if (req->r_attempts) { 2554 /* 2555 * We sent a request earlier, which means that 2556 * previously the pool existed, and now it does not 2557 * (i.e., it was deleted). 2558 */ 2559 req->r_map_dne_bound = map->epoch; 2560 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 2561 req->r_tid); 2562 } else { 2563 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 2564 req, req->r_tid, req->r_map_dne_bound, map->epoch); 2565 } 2566 2567 if (req->r_map_dne_bound) { 2568 if (map->epoch >= req->r_map_dne_bound) { 2569 /* we had a new enough map */ 2570 pr_info_ratelimited("tid %llu pool does not exist\n", 2571 req->r_tid); 2572 complete_request(req, -ENOENT); 2573 } 2574 } else { 2575 send_map_check(req); 2576 } 2577 } 2578 2579 static void map_check_cb(struct ceph_mon_generic_request *greq) 2580 { 2581 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2582 struct ceph_osd_request *req; 2583 u64 tid = greq->private_data; 2584 2585 WARN_ON(greq->result || !greq->u.newest); 2586 2587 down_write(&osdc->lock); 2588 req = lookup_request_mc(&osdc->map_checks, tid); 2589 if (!req) { 2590 dout("%s tid %llu dne\n", __func__, tid); 2591 goto out_unlock; 2592 } 2593 2594 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 2595 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 2596 if (!req->r_map_dne_bound) 2597 req->r_map_dne_bound = greq->u.newest; 2598 erase_request_mc(&osdc->map_checks, req); 2599 check_pool_dne(req); 2600 2601 ceph_osdc_put_request(req); 2602 out_unlock: 2603 up_write(&osdc->lock); 2604 } 2605 2606 static void send_map_check(struct ceph_osd_request *req) 2607 { 2608 struct ceph_osd_client *osdc = req->r_osdc; 2609 struct ceph_osd_request *lookup_req; 2610 int ret; 2611 2612 verify_osdc_wrlocked(osdc); 2613 2614 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2615 if (lookup_req) { 2616 WARN_ON(lookup_req != req); 2617 return; 2618 } 2619 2620 ceph_osdc_get_request(req); 2621 insert_request_mc(&osdc->map_checks, req); 2622 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2623 map_check_cb, req->r_tid); 2624 WARN_ON(ret); 2625 } 2626 2627 /* 2628 * lingering requests, watch/notify v2 infrastructure 2629 */ 2630 static void linger_release(struct kref *kref) 2631 { 2632 struct ceph_osd_linger_request *lreq = 2633 container_of(kref, struct ceph_osd_linger_request, kref); 2634 2635 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 2636 lreq->reg_req, lreq->ping_req); 2637 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 2638 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 2639 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 2640 WARN_ON(!list_empty(&lreq->scan_item)); 2641 WARN_ON(!list_empty(&lreq->pending_lworks)); 2642 WARN_ON(lreq->osd); 2643 2644 if (lreq->reg_req) 2645 ceph_osdc_put_request(lreq->reg_req); 2646 if (lreq->ping_req) 2647 ceph_osdc_put_request(lreq->ping_req); 2648 target_destroy(&lreq->t); 2649 kfree(lreq); 2650 } 2651 2652 static void linger_put(struct ceph_osd_linger_request *lreq) 2653 { 2654 if (lreq) 2655 kref_put(&lreq->kref, linger_release); 2656 } 2657 2658 static struct ceph_osd_linger_request * 2659 linger_get(struct ceph_osd_linger_request *lreq) 2660 { 2661 kref_get(&lreq->kref); 2662 return lreq; 2663 } 2664 2665 static struct ceph_osd_linger_request * 2666 linger_alloc(struct ceph_osd_client *osdc) 2667 { 2668 struct ceph_osd_linger_request *lreq; 2669 2670 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 2671 if (!lreq) 2672 return NULL; 2673 2674 kref_init(&lreq->kref); 2675 mutex_init(&lreq->lock); 2676 RB_CLEAR_NODE(&lreq->node); 2677 RB_CLEAR_NODE(&lreq->osdc_node); 2678 RB_CLEAR_NODE(&lreq->mc_node); 2679 INIT_LIST_HEAD(&lreq->scan_item); 2680 INIT_LIST_HEAD(&lreq->pending_lworks); 2681 init_completion(&lreq->reg_commit_wait); 2682 init_completion(&lreq->notify_finish_wait); 2683 2684 lreq->osdc = osdc; 2685 target_init(&lreq->t); 2686 2687 dout("%s lreq %p\n", __func__, lreq); 2688 return lreq; 2689 } 2690 2691 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 2692 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 2693 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 2694 2695 /* 2696 * Create linger request <-> OSD session relation. 2697 * 2698 * @lreq has to be registered, @osd may be homeless. 2699 */ 2700 static void link_linger(struct ceph_osd *osd, 2701 struct ceph_osd_linger_request *lreq) 2702 { 2703 verify_osd_locked(osd); 2704 WARN_ON(!lreq->linger_id || lreq->osd); 2705 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2706 osd->o_osd, lreq, lreq->linger_id); 2707 2708 if (!osd_homeless(osd)) 2709 __remove_osd_from_lru(osd); 2710 else 2711 atomic_inc(&osd->o_osdc->num_homeless); 2712 2713 get_osd(osd); 2714 insert_linger(&osd->o_linger_requests, lreq); 2715 lreq->osd = osd; 2716 } 2717 2718 static void unlink_linger(struct ceph_osd *osd, 2719 struct ceph_osd_linger_request *lreq) 2720 { 2721 verify_osd_locked(osd); 2722 WARN_ON(lreq->osd != osd); 2723 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2724 osd->o_osd, lreq, lreq->linger_id); 2725 2726 lreq->osd = NULL; 2727 erase_linger(&osd->o_linger_requests, lreq); 2728 put_osd(osd); 2729 2730 if (!osd_homeless(osd)) 2731 maybe_move_osd_to_lru(osd); 2732 else 2733 atomic_dec(&osd->o_osdc->num_homeless); 2734 } 2735 2736 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 2737 { 2738 verify_osdc_locked(lreq->osdc); 2739 2740 return !RB_EMPTY_NODE(&lreq->osdc_node); 2741 } 2742 2743 static bool linger_registered(struct ceph_osd_linger_request *lreq) 2744 { 2745 struct ceph_osd_client *osdc = lreq->osdc; 2746 bool registered; 2747 2748 down_read(&osdc->lock); 2749 registered = __linger_registered(lreq); 2750 up_read(&osdc->lock); 2751 2752 return registered; 2753 } 2754 2755 static void linger_register(struct ceph_osd_linger_request *lreq) 2756 { 2757 struct ceph_osd_client *osdc = lreq->osdc; 2758 2759 verify_osdc_wrlocked(osdc); 2760 WARN_ON(lreq->linger_id); 2761 2762 linger_get(lreq); 2763 lreq->linger_id = ++osdc->last_linger_id; 2764 insert_linger_osdc(&osdc->linger_requests, lreq); 2765 } 2766 2767 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2768 { 2769 struct ceph_osd_client *osdc = lreq->osdc; 2770 2771 verify_osdc_wrlocked(osdc); 2772 2773 erase_linger_osdc(&osdc->linger_requests, lreq); 2774 linger_put(lreq); 2775 } 2776 2777 static void cancel_linger_request(struct ceph_osd_request *req) 2778 { 2779 struct ceph_osd_linger_request *lreq = req->r_priv; 2780 2781 WARN_ON(!req->r_linger); 2782 cancel_request(req); 2783 linger_put(lreq); 2784 } 2785 2786 struct linger_work { 2787 struct work_struct work; 2788 struct ceph_osd_linger_request *lreq; 2789 struct list_head pending_item; 2790 unsigned long queued_stamp; 2791 2792 union { 2793 struct { 2794 u64 notify_id; 2795 u64 notifier_id; 2796 void *payload; /* points into @msg front */ 2797 size_t payload_len; 2798 2799 struct ceph_msg *msg; /* for ceph_msg_put() */ 2800 } notify; 2801 struct { 2802 int err; 2803 } error; 2804 }; 2805 }; 2806 2807 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2808 work_func_t workfn) 2809 { 2810 struct linger_work *lwork; 2811 2812 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2813 if (!lwork) 2814 return NULL; 2815 2816 INIT_WORK(&lwork->work, workfn); 2817 INIT_LIST_HEAD(&lwork->pending_item); 2818 lwork->lreq = linger_get(lreq); 2819 2820 return lwork; 2821 } 2822 2823 static void lwork_free(struct linger_work *lwork) 2824 { 2825 struct ceph_osd_linger_request *lreq = lwork->lreq; 2826 2827 mutex_lock(&lreq->lock); 2828 list_del(&lwork->pending_item); 2829 mutex_unlock(&lreq->lock); 2830 2831 linger_put(lreq); 2832 kfree(lwork); 2833 } 2834 2835 static void lwork_queue(struct linger_work *lwork) 2836 { 2837 struct ceph_osd_linger_request *lreq = lwork->lreq; 2838 struct ceph_osd_client *osdc = lreq->osdc; 2839 2840 verify_lreq_locked(lreq); 2841 WARN_ON(!list_empty(&lwork->pending_item)); 2842 2843 lwork->queued_stamp = jiffies; 2844 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2845 queue_work(osdc->notify_wq, &lwork->work); 2846 } 2847 2848 static void do_watch_notify(struct work_struct *w) 2849 { 2850 struct linger_work *lwork = container_of(w, struct linger_work, work); 2851 struct ceph_osd_linger_request *lreq = lwork->lreq; 2852 2853 if (!linger_registered(lreq)) { 2854 dout("%s lreq %p not registered\n", __func__, lreq); 2855 goto out; 2856 } 2857 2858 WARN_ON(!lreq->is_watch); 2859 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2860 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2861 lwork->notify.payload_len); 2862 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2863 lwork->notify.notifier_id, lwork->notify.payload, 2864 lwork->notify.payload_len); 2865 2866 out: 2867 ceph_msg_put(lwork->notify.msg); 2868 lwork_free(lwork); 2869 } 2870 2871 static void do_watch_error(struct work_struct *w) 2872 { 2873 struct linger_work *lwork = container_of(w, struct linger_work, work); 2874 struct ceph_osd_linger_request *lreq = lwork->lreq; 2875 2876 if (!linger_registered(lreq)) { 2877 dout("%s lreq %p not registered\n", __func__, lreq); 2878 goto out; 2879 } 2880 2881 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2882 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2883 2884 out: 2885 lwork_free(lwork); 2886 } 2887 2888 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2889 { 2890 struct linger_work *lwork; 2891 2892 lwork = lwork_alloc(lreq, do_watch_error); 2893 if (!lwork) { 2894 pr_err("failed to allocate error-lwork\n"); 2895 return; 2896 } 2897 2898 lwork->error.err = lreq->last_error; 2899 lwork_queue(lwork); 2900 } 2901 2902 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2903 int result) 2904 { 2905 if (!completion_done(&lreq->reg_commit_wait)) { 2906 lreq->reg_commit_error = (result <= 0 ? result : 0); 2907 complete_all(&lreq->reg_commit_wait); 2908 } 2909 } 2910 2911 static void linger_commit_cb(struct ceph_osd_request *req) 2912 { 2913 struct ceph_osd_linger_request *lreq = req->r_priv; 2914 2915 mutex_lock(&lreq->lock); 2916 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2917 lreq->linger_id, req->r_result); 2918 linger_reg_commit_complete(lreq, req->r_result); 2919 lreq->committed = true; 2920 2921 if (!lreq->is_watch) { 2922 struct ceph_osd_data *osd_data = 2923 osd_req_op_data(req, 0, notify, response_data); 2924 void *p = page_address(osd_data->pages[0]); 2925 2926 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2927 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2928 2929 /* make note of the notify_id */ 2930 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2931 lreq->notify_id = ceph_decode_64(&p); 2932 dout("lreq %p notify_id %llu\n", lreq, 2933 lreq->notify_id); 2934 } else { 2935 dout("lreq %p no notify_id\n", lreq); 2936 } 2937 } 2938 2939 mutex_unlock(&lreq->lock); 2940 linger_put(lreq); 2941 } 2942 2943 static int normalize_watch_error(int err) 2944 { 2945 /* 2946 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2947 * notification and a failure to reconnect because we raced with 2948 * the delete appear the same to the user. 2949 */ 2950 if (err == -ENOENT) 2951 err = -ENOTCONN; 2952 2953 return err; 2954 } 2955 2956 static void linger_reconnect_cb(struct ceph_osd_request *req) 2957 { 2958 struct ceph_osd_linger_request *lreq = req->r_priv; 2959 2960 mutex_lock(&lreq->lock); 2961 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2962 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2963 if (req->r_result < 0) { 2964 if (!lreq->last_error) { 2965 lreq->last_error = normalize_watch_error(req->r_result); 2966 queue_watch_error(lreq); 2967 } 2968 } 2969 2970 mutex_unlock(&lreq->lock); 2971 linger_put(lreq); 2972 } 2973 2974 static void send_linger(struct ceph_osd_linger_request *lreq) 2975 { 2976 struct ceph_osd_request *req = lreq->reg_req; 2977 struct ceph_osd_req_op *op = &req->r_ops[0]; 2978 2979 verify_osdc_wrlocked(req->r_osdc); 2980 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2981 2982 if (req->r_osd) 2983 cancel_linger_request(req); 2984 2985 request_reinit(req); 2986 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 2987 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 2988 req->r_flags = lreq->t.flags; 2989 req->r_mtime = lreq->mtime; 2990 2991 mutex_lock(&lreq->lock); 2992 if (lreq->is_watch && lreq->committed) { 2993 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2994 op->watch.cookie != lreq->linger_id); 2995 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 2996 op->watch.gen = ++lreq->register_gen; 2997 dout("lreq %p reconnect register_gen %u\n", lreq, 2998 op->watch.gen); 2999 req->r_callback = linger_reconnect_cb; 3000 } else { 3001 if (!lreq->is_watch) 3002 lreq->notify_id = 0; 3003 else 3004 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 3005 dout("lreq %p register\n", lreq); 3006 req->r_callback = linger_commit_cb; 3007 } 3008 mutex_unlock(&lreq->lock); 3009 3010 req->r_priv = linger_get(lreq); 3011 req->r_linger = true; 3012 3013 submit_request(req, true); 3014 } 3015 3016 static void linger_ping_cb(struct ceph_osd_request *req) 3017 { 3018 struct ceph_osd_linger_request *lreq = req->r_priv; 3019 3020 mutex_lock(&lreq->lock); 3021 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 3022 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 3023 lreq->last_error); 3024 if (lreq->register_gen == req->r_ops[0].watch.gen) { 3025 if (!req->r_result) { 3026 lreq->watch_valid_thru = lreq->ping_sent; 3027 } else if (!lreq->last_error) { 3028 lreq->last_error = normalize_watch_error(req->r_result); 3029 queue_watch_error(lreq); 3030 } 3031 } else { 3032 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 3033 lreq->register_gen, req->r_ops[0].watch.gen); 3034 } 3035 3036 mutex_unlock(&lreq->lock); 3037 linger_put(lreq); 3038 } 3039 3040 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 3041 { 3042 struct ceph_osd_client *osdc = lreq->osdc; 3043 struct ceph_osd_request *req = lreq->ping_req; 3044 struct ceph_osd_req_op *op = &req->r_ops[0]; 3045 3046 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 3047 dout("%s PAUSERD\n", __func__); 3048 return; 3049 } 3050 3051 lreq->ping_sent = jiffies; 3052 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 3053 __func__, lreq, lreq->linger_id, lreq->ping_sent, 3054 lreq->register_gen); 3055 3056 if (req->r_osd) 3057 cancel_linger_request(req); 3058 3059 request_reinit(req); 3060 target_copy(&req->r_t, &lreq->t); 3061 3062 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 3063 op->watch.cookie != lreq->linger_id || 3064 op->watch.op != CEPH_OSD_WATCH_OP_PING); 3065 op->watch.gen = lreq->register_gen; 3066 req->r_callback = linger_ping_cb; 3067 req->r_priv = linger_get(lreq); 3068 req->r_linger = true; 3069 3070 ceph_osdc_get_request(req); 3071 account_request(req); 3072 req->r_tid = atomic64_inc_return(&osdc->last_tid); 3073 link_request(lreq->osd, req); 3074 send_request(req); 3075 } 3076 3077 static void linger_submit(struct ceph_osd_linger_request *lreq) 3078 { 3079 struct ceph_osd_client *osdc = lreq->osdc; 3080 struct ceph_osd *osd; 3081 3082 down_write(&osdc->lock); 3083 linger_register(lreq); 3084 if (lreq->is_watch) { 3085 lreq->reg_req->r_ops[0].watch.cookie = lreq->linger_id; 3086 lreq->ping_req->r_ops[0].watch.cookie = lreq->linger_id; 3087 } else { 3088 lreq->reg_req->r_ops[0].notify.cookie = lreq->linger_id; 3089 } 3090 3091 calc_target(osdc, &lreq->t, NULL, false); 3092 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3093 link_linger(osd, lreq); 3094 3095 send_linger(lreq); 3096 up_write(&osdc->lock); 3097 } 3098 3099 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 3100 { 3101 struct ceph_osd_client *osdc = lreq->osdc; 3102 struct ceph_osd_linger_request *lookup_lreq; 3103 3104 verify_osdc_wrlocked(osdc); 3105 3106 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3107 lreq->linger_id); 3108 if (!lookup_lreq) 3109 return; 3110 3111 WARN_ON(lookup_lreq != lreq); 3112 erase_linger_mc(&osdc->linger_map_checks, lreq); 3113 linger_put(lreq); 3114 } 3115 3116 /* 3117 * @lreq has to be both registered and linked. 3118 */ 3119 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 3120 { 3121 if (lreq->is_watch && lreq->ping_req->r_osd) 3122 cancel_linger_request(lreq->ping_req); 3123 if (lreq->reg_req->r_osd) 3124 cancel_linger_request(lreq->reg_req); 3125 cancel_linger_map_check(lreq); 3126 unlink_linger(lreq->osd, lreq); 3127 linger_unregister(lreq); 3128 } 3129 3130 static void linger_cancel(struct ceph_osd_linger_request *lreq) 3131 { 3132 struct ceph_osd_client *osdc = lreq->osdc; 3133 3134 down_write(&osdc->lock); 3135 if (__linger_registered(lreq)) 3136 __linger_cancel(lreq); 3137 up_write(&osdc->lock); 3138 } 3139 3140 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 3141 3142 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 3143 { 3144 struct ceph_osd_client *osdc = lreq->osdc; 3145 struct ceph_osdmap *map = osdc->osdmap; 3146 3147 verify_osdc_wrlocked(osdc); 3148 WARN_ON(!map->epoch); 3149 3150 if (lreq->register_gen) { 3151 lreq->map_dne_bound = map->epoch; 3152 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 3153 lreq, lreq->linger_id); 3154 } else { 3155 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 3156 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3157 map->epoch); 3158 } 3159 3160 if (lreq->map_dne_bound) { 3161 if (map->epoch >= lreq->map_dne_bound) { 3162 /* we had a new enough map */ 3163 pr_info("linger_id %llu pool does not exist\n", 3164 lreq->linger_id); 3165 linger_reg_commit_complete(lreq, -ENOENT); 3166 __linger_cancel(lreq); 3167 } 3168 } else { 3169 send_linger_map_check(lreq); 3170 } 3171 } 3172 3173 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 3174 { 3175 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 3176 struct ceph_osd_linger_request *lreq; 3177 u64 linger_id = greq->private_data; 3178 3179 WARN_ON(greq->result || !greq->u.newest); 3180 3181 down_write(&osdc->lock); 3182 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 3183 if (!lreq) { 3184 dout("%s linger_id %llu dne\n", __func__, linger_id); 3185 goto out_unlock; 3186 } 3187 3188 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 3189 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3190 greq->u.newest); 3191 if (!lreq->map_dne_bound) 3192 lreq->map_dne_bound = greq->u.newest; 3193 erase_linger_mc(&osdc->linger_map_checks, lreq); 3194 check_linger_pool_dne(lreq); 3195 3196 linger_put(lreq); 3197 out_unlock: 3198 up_write(&osdc->lock); 3199 } 3200 3201 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 3202 { 3203 struct ceph_osd_client *osdc = lreq->osdc; 3204 struct ceph_osd_linger_request *lookup_lreq; 3205 int ret; 3206 3207 verify_osdc_wrlocked(osdc); 3208 3209 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3210 lreq->linger_id); 3211 if (lookup_lreq) { 3212 WARN_ON(lookup_lreq != lreq); 3213 return; 3214 } 3215 3216 linger_get(lreq); 3217 insert_linger_mc(&osdc->linger_map_checks, lreq); 3218 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 3219 linger_map_check_cb, lreq->linger_id); 3220 WARN_ON(ret); 3221 } 3222 3223 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 3224 { 3225 int ret; 3226 3227 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3228 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 3229 return ret ?: lreq->reg_commit_error; 3230 } 3231 3232 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 3233 { 3234 int ret; 3235 3236 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3237 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 3238 return ret ?: lreq->notify_finish_error; 3239 } 3240 3241 /* 3242 * Timeout callback, called every N seconds. When 1 or more OSD 3243 * requests has been active for more than N seconds, we send a keepalive 3244 * (tag + timestamp) to its OSD to ensure any communications channel 3245 * reset is detected. 3246 */ 3247 static void handle_timeout(struct work_struct *work) 3248 { 3249 struct ceph_osd_client *osdc = 3250 container_of(work, struct ceph_osd_client, timeout_work.work); 3251 struct ceph_options *opts = osdc->client->options; 3252 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 3253 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout; 3254 LIST_HEAD(slow_osds); 3255 struct rb_node *n, *p; 3256 3257 dout("%s osdc %p\n", __func__, osdc); 3258 down_write(&osdc->lock); 3259 3260 /* 3261 * ping osds that are a bit slow. this ensures that if there 3262 * is a break in the TCP connection we will notice, and reopen 3263 * a connection with that osd (from the fault callback). 3264 */ 3265 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3266 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3267 bool found = false; 3268 3269 for (p = rb_first(&osd->o_requests); p; ) { 3270 struct ceph_osd_request *req = 3271 rb_entry(p, struct ceph_osd_request, r_node); 3272 3273 p = rb_next(p); /* abort_request() */ 3274 3275 if (time_before(req->r_stamp, cutoff)) { 3276 dout(" req %p tid %llu on osd%d is laggy\n", 3277 req, req->r_tid, osd->o_osd); 3278 found = true; 3279 } 3280 if (opts->osd_request_timeout && 3281 time_before(req->r_start_stamp, expiry_cutoff)) { 3282 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3283 req->r_tid, osd->o_osd); 3284 abort_request(req, -ETIMEDOUT); 3285 } 3286 } 3287 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 3288 struct ceph_osd_linger_request *lreq = 3289 rb_entry(p, struct ceph_osd_linger_request, node); 3290 3291 dout(" lreq %p linger_id %llu is served by osd%d\n", 3292 lreq, lreq->linger_id, osd->o_osd); 3293 found = true; 3294 3295 mutex_lock(&lreq->lock); 3296 if (lreq->is_watch && lreq->committed && !lreq->last_error) 3297 send_linger_ping(lreq); 3298 mutex_unlock(&lreq->lock); 3299 } 3300 3301 if (found) 3302 list_move_tail(&osd->o_keepalive_item, &slow_osds); 3303 } 3304 3305 if (opts->osd_request_timeout) { 3306 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 3307 struct ceph_osd_request *req = 3308 rb_entry(p, struct ceph_osd_request, r_node); 3309 3310 p = rb_next(p); /* abort_request() */ 3311 3312 if (time_before(req->r_start_stamp, expiry_cutoff)) { 3313 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3314 req->r_tid, osdc->homeless_osd.o_osd); 3315 abort_request(req, -ETIMEDOUT); 3316 } 3317 } 3318 } 3319 3320 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 3321 maybe_request_map(osdc); 3322 3323 while (!list_empty(&slow_osds)) { 3324 struct ceph_osd *osd = list_first_entry(&slow_osds, 3325 struct ceph_osd, 3326 o_keepalive_item); 3327 list_del_init(&osd->o_keepalive_item); 3328 ceph_con_keepalive(&osd->o_con); 3329 } 3330 3331 up_write(&osdc->lock); 3332 schedule_delayed_work(&osdc->timeout_work, 3333 osdc->client->options->osd_keepalive_timeout); 3334 } 3335 3336 static void handle_osds_timeout(struct work_struct *work) 3337 { 3338 struct ceph_osd_client *osdc = 3339 container_of(work, struct ceph_osd_client, 3340 osds_timeout_work.work); 3341 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 3342 struct ceph_osd *osd, *nosd; 3343 3344 dout("%s osdc %p\n", __func__, osdc); 3345 down_write(&osdc->lock); 3346 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 3347 if (time_before(jiffies, osd->lru_ttl)) 3348 break; 3349 3350 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 3351 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 3352 close_osd(osd); 3353 } 3354 3355 up_write(&osdc->lock); 3356 schedule_delayed_work(&osdc->osds_timeout_work, 3357 round_jiffies_relative(delay)); 3358 } 3359 3360 static int ceph_oloc_decode(void **p, void *end, 3361 struct ceph_object_locator *oloc) 3362 { 3363 u8 struct_v, struct_cv; 3364 u32 len; 3365 void *struct_end; 3366 int ret = 0; 3367 3368 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3369 struct_v = ceph_decode_8(p); 3370 struct_cv = ceph_decode_8(p); 3371 if (struct_v < 3) { 3372 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 3373 struct_v, struct_cv); 3374 goto e_inval; 3375 } 3376 if (struct_cv > 6) { 3377 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 3378 struct_v, struct_cv); 3379 goto e_inval; 3380 } 3381 len = ceph_decode_32(p); 3382 ceph_decode_need(p, end, len, e_inval); 3383 struct_end = *p + len; 3384 3385 oloc->pool = ceph_decode_64(p); 3386 *p += 4; /* skip preferred */ 3387 3388 len = ceph_decode_32(p); 3389 if (len > 0) { 3390 pr_warn("ceph_object_locator::key is set\n"); 3391 goto e_inval; 3392 } 3393 3394 if (struct_v >= 5) { 3395 bool changed = false; 3396 3397 len = ceph_decode_32(p); 3398 if (len > 0) { 3399 ceph_decode_need(p, end, len, e_inval); 3400 if (!oloc->pool_ns || 3401 ceph_compare_string(oloc->pool_ns, *p, len)) 3402 changed = true; 3403 *p += len; 3404 } else { 3405 if (oloc->pool_ns) 3406 changed = true; 3407 } 3408 if (changed) { 3409 /* redirect changes namespace */ 3410 pr_warn("ceph_object_locator::nspace is changed\n"); 3411 goto e_inval; 3412 } 3413 } 3414 3415 if (struct_v >= 6) { 3416 s64 hash = ceph_decode_64(p); 3417 if (hash != -1) { 3418 pr_warn("ceph_object_locator::hash is set\n"); 3419 goto e_inval; 3420 } 3421 } 3422 3423 /* skip the rest */ 3424 *p = struct_end; 3425 out: 3426 return ret; 3427 3428 e_inval: 3429 ret = -EINVAL; 3430 goto out; 3431 } 3432 3433 static int ceph_redirect_decode(void **p, void *end, 3434 struct ceph_request_redirect *redir) 3435 { 3436 u8 struct_v, struct_cv; 3437 u32 len; 3438 void *struct_end; 3439 int ret; 3440 3441 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3442 struct_v = ceph_decode_8(p); 3443 struct_cv = ceph_decode_8(p); 3444 if (struct_cv > 1) { 3445 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 3446 struct_v, struct_cv); 3447 goto e_inval; 3448 } 3449 len = ceph_decode_32(p); 3450 ceph_decode_need(p, end, len, e_inval); 3451 struct_end = *p + len; 3452 3453 ret = ceph_oloc_decode(p, end, &redir->oloc); 3454 if (ret) 3455 goto out; 3456 3457 len = ceph_decode_32(p); 3458 if (len > 0) { 3459 pr_warn("ceph_request_redirect::object_name is set\n"); 3460 goto e_inval; 3461 } 3462 3463 len = ceph_decode_32(p); 3464 *p += len; /* skip osd_instructions */ 3465 3466 /* skip the rest */ 3467 *p = struct_end; 3468 out: 3469 return ret; 3470 3471 e_inval: 3472 ret = -EINVAL; 3473 goto out; 3474 } 3475 3476 struct MOSDOpReply { 3477 struct ceph_pg pgid; 3478 u64 flags; 3479 int result; 3480 u32 epoch; 3481 int num_ops; 3482 u32 outdata_len[CEPH_OSD_MAX_OPS]; 3483 s32 rval[CEPH_OSD_MAX_OPS]; 3484 int retry_attempt; 3485 struct ceph_eversion replay_version; 3486 u64 user_version; 3487 struct ceph_request_redirect redirect; 3488 }; 3489 3490 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 3491 { 3492 void *p = msg->front.iov_base; 3493 void *const end = p + msg->front.iov_len; 3494 u16 version = le16_to_cpu(msg->hdr.version); 3495 struct ceph_eversion bad_replay_version; 3496 u8 decode_redir; 3497 u32 len; 3498 int ret; 3499 int i; 3500 3501 ceph_decode_32_safe(&p, end, len, e_inval); 3502 ceph_decode_need(&p, end, len, e_inval); 3503 p += len; /* skip oid */ 3504 3505 ret = ceph_decode_pgid(&p, end, &m->pgid); 3506 if (ret) 3507 return ret; 3508 3509 ceph_decode_64_safe(&p, end, m->flags, e_inval); 3510 ceph_decode_32_safe(&p, end, m->result, e_inval); 3511 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 3512 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 3513 p += sizeof(bad_replay_version); 3514 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 3515 3516 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 3517 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 3518 goto e_inval; 3519 3520 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 3521 e_inval); 3522 for (i = 0; i < m->num_ops; i++) { 3523 struct ceph_osd_op *op = p; 3524 3525 m->outdata_len[i] = le32_to_cpu(op->payload_len); 3526 p += sizeof(*op); 3527 } 3528 3529 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 3530 for (i = 0; i < m->num_ops; i++) 3531 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 3532 3533 if (version >= 5) { 3534 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 3535 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 3536 p += sizeof(m->replay_version); 3537 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 3538 } else { 3539 m->replay_version = bad_replay_version; /* struct */ 3540 m->user_version = le64_to_cpu(m->replay_version.version); 3541 } 3542 3543 if (version >= 6) { 3544 if (version >= 7) 3545 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 3546 else 3547 decode_redir = 1; 3548 } else { 3549 decode_redir = 0; 3550 } 3551 3552 if (decode_redir) { 3553 ret = ceph_redirect_decode(&p, end, &m->redirect); 3554 if (ret) 3555 return ret; 3556 } else { 3557 ceph_oloc_init(&m->redirect.oloc); 3558 } 3559 3560 return 0; 3561 3562 e_inval: 3563 return -EINVAL; 3564 } 3565 3566 /* 3567 * Handle MOSDOpReply. Set ->r_result and call the callback if it is 3568 * specified. 3569 */ 3570 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 3571 { 3572 struct ceph_osd_client *osdc = osd->o_osdc; 3573 struct ceph_osd_request *req; 3574 struct MOSDOpReply m; 3575 u64 tid = le64_to_cpu(msg->hdr.tid); 3576 u32 data_len = 0; 3577 int ret; 3578 int i; 3579 3580 dout("%s msg %p tid %llu\n", __func__, msg, tid); 3581 3582 down_read(&osdc->lock); 3583 if (!osd_registered(osd)) { 3584 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3585 goto out_unlock_osdc; 3586 } 3587 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 3588 3589 mutex_lock(&osd->lock); 3590 req = lookup_request(&osd->o_requests, tid); 3591 if (!req) { 3592 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 3593 goto out_unlock_session; 3594 } 3595 3596 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 3597 ret = decode_MOSDOpReply(msg, &m); 3598 m.redirect.oloc.pool_ns = NULL; 3599 if (ret) { 3600 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 3601 req->r_tid, ret); 3602 ceph_msg_dump(msg); 3603 goto fail_request; 3604 } 3605 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 3606 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 3607 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 3608 le64_to_cpu(m.replay_version.version), m.user_version); 3609 3610 if (m.retry_attempt >= 0) { 3611 if (m.retry_attempt != req->r_attempts - 1) { 3612 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 3613 req, req->r_tid, m.retry_attempt, 3614 req->r_attempts - 1); 3615 goto out_unlock_session; 3616 } 3617 } else { 3618 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 3619 } 3620 3621 if (!ceph_oloc_empty(&m.redirect.oloc)) { 3622 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 3623 m.redirect.oloc.pool); 3624 unlink_request(osd, req); 3625 mutex_unlock(&osd->lock); 3626 3627 /* 3628 * Not ceph_oloc_copy() - changing pool_ns is not 3629 * supported. 3630 */ 3631 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 3632 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED; 3633 req->r_tid = 0; 3634 __submit_request(req, false); 3635 goto out_unlock_osdc; 3636 } 3637 3638 if (m.num_ops != req->r_num_ops) { 3639 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 3640 req->r_num_ops, req->r_tid); 3641 goto fail_request; 3642 } 3643 for (i = 0; i < req->r_num_ops; i++) { 3644 dout(" req %p tid %llu op %d rval %d len %u\n", req, 3645 req->r_tid, i, m.rval[i], m.outdata_len[i]); 3646 req->r_ops[i].rval = m.rval[i]; 3647 req->r_ops[i].outdata_len = m.outdata_len[i]; 3648 data_len += m.outdata_len[i]; 3649 } 3650 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 3651 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 3652 le32_to_cpu(msg->hdr.data_len), req->r_tid); 3653 goto fail_request; 3654 } 3655 dout("%s req %p tid %llu result %d data_len %u\n", __func__, 3656 req, req->r_tid, m.result, data_len); 3657 3658 /* 3659 * Since we only ever request ONDISK, we should only ever get 3660 * one (type of) reply back. 3661 */ 3662 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK)); 3663 req->r_result = m.result ?: data_len; 3664 finish_request(req); 3665 mutex_unlock(&osd->lock); 3666 up_read(&osdc->lock); 3667 3668 __complete_request(req); 3669 return; 3670 3671 fail_request: 3672 complete_request(req, -EIO); 3673 out_unlock_session: 3674 mutex_unlock(&osd->lock); 3675 out_unlock_osdc: 3676 up_read(&osdc->lock); 3677 } 3678 3679 static void set_pool_was_full(struct ceph_osd_client *osdc) 3680 { 3681 struct rb_node *n; 3682 3683 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 3684 struct ceph_pg_pool_info *pi = 3685 rb_entry(n, struct ceph_pg_pool_info, node); 3686 3687 pi->was_full = __pool_full(pi); 3688 } 3689 } 3690 3691 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 3692 { 3693 struct ceph_pg_pool_info *pi; 3694 3695 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 3696 if (!pi) 3697 return false; 3698 3699 return pi->was_full && !__pool_full(pi); 3700 } 3701 3702 static enum calc_target_result 3703 recalc_linger_target(struct ceph_osd_linger_request *lreq) 3704 { 3705 struct ceph_osd_client *osdc = lreq->osdc; 3706 enum calc_target_result ct_res; 3707 3708 ct_res = calc_target(osdc, &lreq->t, NULL, true); 3709 if (ct_res == CALC_TARGET_NEED_RESEND) { 3710 struct ceph_osd *osd; 3711 3712 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3713 if (osd != lreq->osd) { 3714 unlink_linger(lreq->osd, lreq); 3715 link_linger(osd, lreq); 3716 } 3717 } 3718 3719 return ct_res; 3720 } 3721 3722 /* 3723 * Requeue requests whose mapping to an OSD has changed. 3724 */ 3725 static void scan_requests(struct ceph_osd *osd, 3726 bool force_resend, 3727 bool cleared_full, 3728 bool check_pool_cleared_full, 3729 struct rb_root *need_resend, 3730 struct list_head *need_resend_linger) 3731 { 3732 struct ceph_osd_client *osdc = osd->o_osdc; 3733 struct rb_node *n; 3734 bool force_resend_writes; 3735 3736 for (n = rb_first(&osd->o_linger_requests); n; ) { 3737 struct ceph_osd_linger_request *lreq = 3738 rb_entry(n, struct ceph_osd_linger_request, node); 3739 enum calc_target_result ct_res; 3740 3741 n = rb_next(n); /* recalc_linger_target() */ 3742 3743 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 3744 lreq->linger_id); 3745 ct_res = recalc_linger_target(lreq); 3746 switch (ct_res) { 3747 case CALC_TARGET_NO_ACTION: 3748 force_resend_writes = cleared_full || 3749 (check_pool_cleared_full && 3750 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 3751 if (!force_resend && !force_resend_writes) 3752 break; 3753 3754 /* fall through */ 3755 case CALC_TARGET_NEED_RESEND: 3756 cancel_linger_map_check(lreq); 3757 /* 3758 * scan_requests() for the previous epoch(s) 3759 * may have already added it to the list, since 3760 * it's not unlinked here. 3761 */ 3762 if (list_empty(&lreq->scan_item)) 3763 list_add_tail(&lreq->scan_item, need_resend_linger); 3764 break; 3765 case CALC_TARGET_POOL_DNE: 3766 list_del_init(&lreq->scan_item); 3767 check_linger_pool_dne(lreq); 3768 break; 3769 } 3770 } 3771 3772 for (n = rb_first(&osd->o_requests); n; ) { 3773 struct ceph_osd_request *req = 3774 rb_entry(n, struct ceph_osd_request, r_node); 3775 enum calc_target_result ct_res; 3776 3777 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3778 3779 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3780 ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con, 3781 false); 3782 switch (ct_res) { 3783 case CALC_TARGET_NO_ACTION: 3784 force_resend_writes = cleared_full || 3785 (check_pool_cleared_full && 3786 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3787 if (!force_resend && 3788 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3789 !force_resend_writes)) 3790 break; 3791 3792 /* fall through */ 3793 case CALC_TARGET_NEED_RESEND: 3794 cancel_map_check(req); 3795 unlink_request(osd, req); 3796 insert_request(need_resend, req); 3797 break; 3798 case CALC_TARGET_POOL_DNE: 3799 check_pool_dne(req); 3800 break; 3801 } 3802 } 3803 } 3804 3805 static int handle_one_map(struct ceph_osd_client *osdc, 3806 void *p, void *end, bool incremental, 3807 struct rb_root *need_resend, 3808 struct list_head *need_resend_linger) 3809 { 3810 struct ceph_osdmap *newmap; 3811 struct rb_node *n; 3812 bool skipped_map = false; 3813 bool was_full; 3814 3815 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3816 set_pool_was_full(osdc); 3817 3818 if (incremental) 3819 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3820 else 3821 newmap = ceph_osdmap_decode(&p, end); 3822 if (IS_ERR(newmap)) 3823 return PTR_ERR(newmap); 3824 3825 if (newmap != osdc->osdmap) { 3826 /* 3827 * Preserve ->was_full before destroying the old map. 3828 * For pools that weren't in the old map, ->was_full 3829 * should be false. 3830 */ 3831 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3832 struct ceph_pg_pool_info *pi = 3833 rb_entry(n, struct ceph_pg_pool_info, node); 3834 struct ceph_pg_pool_info *old_pi; 3835 3836 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3837 if (old_pi) 3838 pi->was_full = old_pi->was_full; 3839 else 3840 WARN_ON(pi->was_full); 3841 } 3842 3843 if (osdc->osdmap->epoch && 3844 osdc->osdmap->epoch + 1 < newmap->epoch) { 3845 WARN_ON(incremental); 3846 skipped_map = true; 3847 } 3848 3849 ceph_osdmap_destroy(osdc->osdmap); 3850 osdc->osdmap = newmap; 3851 } 3852 3853 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3854 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3855 need_resend, need_resend_linger); 3856 3857 for (n = rb_first(&osdc->osds); n; ) { 3858 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3859 3860 n = rb_next(n); /* close_osd() */ 3861 3862 scan_requests(osd, skipped_map, was_full, true, need_resend, 3863 need_resend_linger); 3864 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3865 memcmp(&osd->o_con.peer_addr, 3866 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3867 sizeof(struct ceph_entity_addr))) 3868 close_osd(osd); 3869 } 3870 3871 return 0; 3872 } 3873 3874 static void kick_requests(struct ceph_osd_client *osdc, 3875 struct rb_root *need_resend, 3876 struct list_head *need_resend_linger) 3877 { 3878 struct ceph_osd_linger_request *lreq, *nlreq; 3879 enum calc_target_result ct_res; 3880 struct rb_node *n; 3881 3882 /* make sure need_resend targets reflect latest map */ 3883 for (n = rb_first(need_resend); n; ) { 3884 struct ceph_osd_request *req = 3885 rb_entry(n, struct ceph_osd_request, r_node); 3886 3887 n = rb_next(n); 3888 3889 if (req->r_t.epoch < osdc->osdmap->epoch) { 3890 ct_res = calc_target(osdc, &req->r_t, NULL, false); 3891 if (ct_res == CALC_TARGET_POOL_DNE) { 3892 erase_request(need_resend, req); 3893 check_pool_dne(req); 3894 } 3895 } 3896 } 3897 3898 for (n = rb_first(need_resend); n; ) { 3899 struct ceph_osd_request *req = 3900 rb_entry(n, struct ceph_osd_request, r_node); 3901 struct ceph_osd *osd; 3902 3903 n = rb_next(n); 3904 erase_request(need_resend, req); /* before link_request() */ 3905 3906 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3907 link_request(osd, req); 3908 if (!req->r_linger) { 3909 if (!osd_homeless(osd) && !req->r_t.paused) 3910 send_request(req); 3911 } else { 3912 cancel_linger_request(req); 3913 } 3914 } 3915 3916 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3917 if (!osd_homeless(lreq->osd)) 3918 send_linger(lreq); 3919 3920 list_del_init(&lreq->scan_item); 3921 } 3922 } 3923 3924 /* 3925 * Process updated osd map. 3926 * 3927 * The message contains any number of incremental and full maps, normally 3928 * indicating some sort of topology change in the cluster. Kick requests 3929 * off to different OSDs as needed. 3930 */ 3931 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3932 { 3933 void *p = msg->front.iov_base; 3934 void *const end = p + msg->front.iov_len; 3935 u32 nr_maps, maplen; 3936 u32 epoch; 3937 struct ceph_fsid fsid; 3938 struct rb_root need_resend = RB_ROOT; 3939 LIST_HEAD(need_resend_linger); 3940 bool handled_incremental = false; 3941 bool was_pauserd, was_pausewr; 3942 bool pauserd, pausewr; 3943 int err; 3944 3945 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3946 down_write(&osdc->lock); 3947 3948 /* verify fsid */ 3949 ceph_decode_need(&p, end, sizeof(fsid), bad); 3950 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3951 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3952 goto bad; 3953 3954 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3955 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3956 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3957 have_pool_full(osdc); 3958 3959 /* incremental maps */ 3960 ceph_decode_32_safe(&p, end, nr_maps, bad); 3961 dout(" %d inc maps\n", nr_maps); 3962 while (nr_maps > 0) { 3963 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3964 epoch = ceph_decode_32(&p); 3965 maplen = ceph_decode_32(&p); 3966 ceph_decode_need(&p, end, maplen, bad); 3967 if (osdc->osdmap->epoch && 3968 osdc->osdmap->epoch + 1 == epoch) { 3969 dout("applying incremental map %u len %d\n", 3970 epoch, maplen); 3971 err = handle_one_map(osdc, p, p + maplen, true, 3972 &need_resend, &need_resend_linger); 3973 if (err) 3974 goto bad; 3975 handled_incremental = true; 3976 } else { 3977 dout("ignoring incremental map %u len %d\n", 3978 epoch, maplen); 3979 } 3980 p += maplen; 3981 nr_maps--; 3982 } 3983 if (handled_incremental) 3984 goto done; 3985 3986 /* full maps */ 3987 ceph_decode_32_safe(&p, end, nr_maps, bad); 3988 dout(" %d full maps\n", nr_maps); 3989 while (nr_maps) { 3990 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3991 epoch = ceph_decode_32(&p); 3992 maplen = ceph_decode_32(&p); 3993 ceph_decode_need(&p, end, maplen, bad); 3994 if (nr_maps > 1) { 3995 dout("skipping non-latest full map %u len %d\n", 3996 epoch, maplen); 3997 } else if (osdc->osdmap->epoch >= epoch) { 3998 dout("skipping full map %u len %d, " 3999 "older than our %u\n", epoch, maplen, 4000 osdc->osdmap->epoch); 4001 } else { 4002 dout("taking full map %u len %d\n", epoch, maplen); 4003 err = handle_one_map(osdc, p, p + maplen, false, 4004 &need_resend, &need_resend_linger); 4005 if (err) 4006 goto bad; 4007 } 4008 p += maplen; 4009 nr_maps--; 4010 } 4011 4012 done: 4013 /* 4014 * subscribe to subsequent osdmap updates if full to ensure 4015 * we find out when we are no longer full and stop returning 4016 * ENOSPC. 4017 */ 4018 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 4019 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 4020 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 4021 have_pool_full(osdc); 4022 if (was_pauserd || was_pausewr || pauserd || pausewr || 4023 osdc->osdmap->epoch < osdc->epoch_barrier) 4024 maybe_request_map(osdc); 4025 4026 kick_requests(osdc, &need_resend, &need_resend_linger); 4027 4028 ceph_osdc_abort_on_full(osdc); 4029 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 4030 osdc->osdmap->epoch); 4031 up_write(&osdc->lock); 4032 wake_up_all(&osdc->client->auth_wq); 4033 return; 4034 4035 bad: 4036 pr_err("osdc handle_map corrupt msg\n"); 4037 ceph_msg_dump(msg); 4038 up_write(&osdc->lock); 4039 } 4040 4041 /* 4042 * Resubmit requests pending on the given osd. 4043 */ 4044 static void kick_osd_requests(struct ceph_osd *osd) 4045 { 4046 struct rb_node *n; 4047 4048 clear_backoffs(osd); 4049 4050 for (n = rb_first(&osd->o_requests); n; ) { 4051 struct ceph_osd_request *req = 4052 rb_entry(n, struct ceph_osd_request, r_node); 4053 4054 n = rb_next(n); /* cancel_linger_request() */ 4055 4056 if (!req->r_linger) { 4057 if (!req->r_t.paused) 4058 send_request(req); 4059 } else { 4060 cancel_linger_request(req); 4061 } 4062 } 4063 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 4064 struct ceph_osd_linger_request *lreq = 4065 rb_entry(n, struct ceph_osd_linger_request, node); 4066 4067 send_linger(lreq); 4068 } 4069 } 4070 4071 /* 4072 * If the osd connection drops, we need to resubmit all requests. 4073 */ 4074 static void osd_fault(struct ceph_connection *con) 4075 { 4076 struct ceph_osd *osd = con->private; 4077 struct ceph_osd_client *osdc = osd->o_osdc; 4078 4079 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 4080 4081 down_write(&osdc->lock); 4082 if (!osd_registered(osd)) { 4083 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4084 goto out_unlock; 4085 } 4086 4087 if (!reopen_osd(osd)) 4088 kick_osd_requests(osd); 4089 maybe_request_map(osdc); 4090 4091 out_unlock: 4092 up_write(&osdc->lock); 4093 } 4094 4095 struct MOSDBackoff { 4096 struct ceph_spg spgid; 4097 u32 map_epoch; 4098 u8 op; 4099 u64 id; 4100 struct ceph_hobject_id *begin; 4101 struct ceph_hobject_id *end; 4102 }; 4103 4104 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m) 4105 { 4106 void *p = msg->front.iov_base; 4107 void *const end = p + msg->front.iov_len; 4108 u8 struct_v; 4109 u32 struct_len; 4110 int ret; 4111 4112 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len); 4113 if (ret) 4114 return ret; 4115 4116 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid); 4117 if (ret) 4118 return ret; 4119 4120 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval); 4121 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval); 4122 ceph_decode_8_safe(&p, end, m->op, e_inval); 4123 ceph_decode_64_safe(&p, end, m->id, e_inval); 4124 4125 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO); 4126 if (!m->begin) 4127 return -ENOMEM; 4128 4129 ret = decode_hoid(&p, end, m->begin); 4130 if (ret) { 4131 free_hoid(m->begin); 4132 return ret; 4133 } 4134 4135 m->end = kzalloc(sizeof(*m->end), GFP_NOIO); 4136 if (!m->end) { 4137 free_hoid(m->begin); 4138 return -ENOMEM; 4139 } 4140 4141 ret = decode_hoid(&p, end, m->end); 4142 if (ret) { 4143 free_hoid(m->begin); 4144 free_hoid(m->end); 4145 return ret; 4146 } 4147 4148 return 0; 4149 4150 e_inval: 4151 return -EINVAL; 4152 } 4153 4154 static struct ceph_msg *create_backoff_message( 4155 const struct ceph_osd_backoff *backoff, 4156 u32 map_epoch) 4157 { 4158 struct ceph_msg *msg; 4159 void *p, *end; 4160 int msg_size; 4161 4162 msg_size = CEPH_ENCODING_START_BLK_LEN + 4163 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 4164 msg_size += 4 + 1 + 8; /* map_epoch, op, id */ 4165 msg_size += CEPH_ENCODING_START_BLK_LEN + 4166 hoid_encoding_size(backoff->begin); 4167 msg_size += CEPH_ENCODING_START_BLK_LEN + 4168 hoid_encoding_size(backoff->end); 4169 4170 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true); 4171 if (!msg) 4172 return NULL; 4173 4174 p = msg->front.iov_base; 4175 end = p + msg->front_alloc_len; 4176 4177 encode_spgid(&p, &backoff->spgid); 4178 ceph_encode_32(&p, map_epoch); 4179 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK); 4180 ceph_encode_64(&p, backoff->id); 4181 encode_hoid(&p, end, backoff->begin); 4182 encode_hoid(&p, end, backoff->end); 4183 BUG_ON(p != end); 4184 4185 msg->front.iov_len = p - msg->front.iov_base; 4186 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */ 4187 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 4188 4189 return msg; 4190 } 4191 4192 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m) 4193 { 4194 struct ceph_spg_mapping *spg; 4195 struct ceph_osd_backoff *backoff; 4196 struct ceph_msg *msg; 4197 4198 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4199 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4200 4201 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid); 4202 if (!spg) { 4203 spg = alloc_spg_mapping(); 4204 if (!spg) { 4205 pr_err("%s failed to allocate spg\n", __func__); 4206 return; 4207 } 4208 spg->spgid = m->spgid; /* struct */ 4209 insert_spg_mapping(&osd->o_backoff_mappings, spg); 4210 } 4211 4212 backoff = alloc_backoff(); 4213 if (!backoff) { 4214 pr_err("%s failed to allocate backoff\n", __func__); 4215 return; 4216 } 4217 backoff->spgid = m->spgid; /* struct */ 4218 backoff->id = m->id; 4219 backoff->begin = m->begin; 4220 m->begin = NULL; /* backoff now owns this */ 4221 backoff->end = m->end; 4222 m->end = NULL; /* ditto */ 4223 4224 insert_backoff(&spg->backoffs, backoff); 4225 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4226 4227 /* 4228 * Ack with original backoff's epoch so that the OSD can 4229 * discard this if there was a PG split. 4230 */ 4231 msg = create_backoff_message(backoff, m->map_epoch); 4232 if (!msg) { 4233 pr_err("%s failed to allocate msg\n", __func__); 4234 return; 4235 } 4236 ceph_con_send(&osd->o_con, msg); 4237 } 4238 4239 static bool target_contained_by(const struct ceph_osd_request_target *t, 4240 const struct ceph_hobject_id *begin, 4241 const struct ceph_hobject_id *end) 4242 { 4243 struct ceph_hobject_id hoid; 4244 int cmp; 4245 4246 hoid_fill_from_target(&hoid, t); 4247 cmp = hoid_compare(&hoid, begin); 4248 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0); 4249 } 4250 4251 static void handle_backoff_unblock(struct ceph_osd *osd, 4252 const struct MOSDBackoff *m) 4253 { 4254 struct ceph_spg_mapping *spg; 4255 struct ceph_osd_backoff *backoff; 4256 struct rb_node *n; 4257 4258 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4259 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4260 4261 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id); 4262 if (!backoff) { 4263 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n", 4264 __func__, osd->o_osd, m->spgid.pgid.pool, 4265 m->spgid.pgid.seed, m->spgid.shard, m->id); 4266 return; 4267 } 4268 4269 if (hoid_compare(backoff->begin, m->begin) && 4270 hoid_compare(backoff->end, m->end)) { 4271 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n", 4272 __func__, osd->o_osd, m->spgid.pgid.pool, 4273 m->spgid.pgid.seed, m->spgid.shard, m->id); 4274 /* unblock it anyway... */ 4275 } 4276 4277 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid); 4278 BUG_ON(!spg); 4279 4280 erase_backoff(&spg->backoffs, backoff); 4281 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4282 free_backoff(backoff); 4283 4284 if (RB_EMPTY_ROOT(&spg->backoffs)) { 4285 erase_spg_mapping(&osd->o_backoff_mappings, spg); 4286 free_spg_mapping(spg); 4287 } 4288 4289 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 4290 struct ceph_osd_request *req = 4291 rb_entry(n, struct ceph_osd_request, r_node); 4292 4293 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) { 4294 /* 4295 * Match against @m, not @backoff -- the PG may 4296 * have split on the OSD. 4297 */ 4298 if (target_contained_by(&req->r_t, m->begin, m->end)) { 4299 /* 4300 * If no other installed backoff applies, 4301 * resend. 4302 */ 4303 send_request(req); 4304 } 4305 } 4306 } 4307 } 4308 4309 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg) 4310 { 4311 struct ceph_osd_client *osdc = osd->o_osdc; 4312 struct MOSDBackoff m; 4313 int ret; 4314 4315 down_read(&osdc->lock); 4316 if (!osd_registered(osd)) { 4317 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4318 up_read(&osdc->lock); 4319 return; 4320 } 4321 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 4322 4323 mutex_lock(&osd->lock); 4324 ret = decode_MOSDBackoff(msg, &m); 4325 if (ret) { 4326 pr_err("failed to decode MOSDBackoff: %d\n", ret); 4327 ceph_msg_dump(msg); 4328 goto out_unlock; 4329 } 4330 4331 switch (m.op) { 4332 case CEPH_OSD_BACKOFF_OP_BLOCK: 4333 handle_backoff_block(osd, &m); 4334 break; 4335 case CEPH_OSD_BACKOFF_OP_UNBLOCK: 4336 handle_backoff_unblock(osd, &m); 4337 break; 4338 default: 4339 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op); 4340 } 4341 4342 free_hoid(m.begin); 4343 free_hoid(m.end); 4344 4345 out_unlock: 4346 mutex_unlock(&osd->lock); 4347 up_read(&osdc->lock); 4348 } 4349 4350 /* 4351 * Process osd watch notifications 4352 */ 4353 static void handle_watch_notify(struct ceph_osd_client *osdc, 4354 struct ceph_msg *msg) 4355 { 4356 void *p = msg->front.iov_base; 4357 void *const end = p + msg->front.iov_len; 4358 struct ceph_osd_linger_request *lreq; 4359 struct linger_work *lwork; 4360 u8 proto_ver, opcode; 4361 u64 cookie, notify_id; 4362 u64 notifier_id = 0; 4363 s32 return_code = 0; 4364 void *payload = NULL; 4365 u32 payload_len = 0; 4366 4367 ceph_decode_8_safe(&p, end, proto_ver, bad); 4368 ceph_decode_8_safe(&p, end, opcode, bad); 4369 ceph_decode_64_safe(&p, end, cookie, bad); 4370 p += 8; /* skip ver */ 4371 ceph_decode_64_safe(&p, end, notify_id, bad); 4372 4373 if (proto_ver >= 1) { 4374 ceph_decode_32_safe(&p, end, payload_len, bad); 4375 ceph_decode_need(&p, end, payload_len, bad); 4376 payload = p; 4377 p += payload_len; 4378 } 4379 4380 if (le16_to_cpu(msg->hdr.version) >= 2) 4381 ceph_decode_32_safe(&p, end, return_code, bad); 4382 4383 if (le16_to_cpu(msg->hdr.version) >= 3) 4384 ceph_decode_64_safe(&p, end, notifier_id, bad); 4385 4386 down_read(&osdc->lock); 4387 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 4388 if (!lreq) { 4389 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 4390 cookie); 4391 goto out_unlock_osdc; 4392 } 4393 4394 mutex_lock(&lreq->lock); 4395 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 4396 opcode, cookie, lreq, lreq->is_watch); 4397 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 4398 if (!lreq->last_error) { 4399 lreq->last_error = -ENOTCONN; 4400 queue_watch_error(lreq); 4401 } 4402 } else if (!lreq->is_watch) { 4403 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 4404 if (lreq->notify_id && lreq->notify_id != notify_id) { 4405 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 4406 lreq->notify_id, notify_id); 4407 } else if (!completion_done(&lreq->notify_finish_wait)) { 4408 struct ceph_msg_data *data = 4409 msg->num_data_items ? &msg->data[0] : NULL; 4410 4411 if (data) { 4412 if (lreq->preply_pages) { 4413 WARN_ON(data->type != 4414 CEPH_MSG_DATA_PAGES); 4415 *lreq->preply_pages = data->pages; 4416 *lreq->preply_len = data->length; 4417 } else { 4418 ceph_release_page_vector(data->pages, 4419 calc_pages_for(0, data->length)); 4420 } 4421 } 4422 lreq->notify_finish_error = return_code; 4423 complete_all(&lreq->notify_finish_wait); 4424 } 4425 } else { 4426 /* CEPH_WATCH_EVENT_NOTIFY */ 4427 lwork = lwork_alloc(lreq, do_watch_notify); 4428 if (!lwork) { 4429 pr_err("failed to allocate notify-lwork\n"); 4430 goto out_unlock_lreq; 4431 } 4432 4433 lwork->notify.notify_id = notify_id; 4434 lwork->notify.notifier_id = notifier_id; 4435 lwork->notify.payload = payload; 4436 lwork->notify.payload_len = payload_len; 4437 lwork->notify.msg = ceph_msg_get(msg); 4438 lwork_queue(lwork); 4439 } 4440 4441 out_unlock_lreq: 4442 mutex_unlock(&lreq->lock); 4443 out_unlock_osdc: 4444 up_read(&osdc->lock); 4445 return; 4446 4447 bad: 4448 pr_err("osdc handle_watch_notify corrupt msg\n"); 4449 } 4450 4451 /* 4452 * Register request, send initial attempt. 4453 */ 4454 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 4455 struct ceph_osd_request *req, 4456 bool nofail) 4457 { 4458 down_read(&osdc->lock); 4459 submit_request(req, false); 4460 up_read(&osdc->lock); 4461 4462 return 0; 4463 } 4464 EXPORT_SYMBOL(ceph_osdc_start_request); 4465 4466 /* 4467 * Unregister a registered request. The request is not completed: 4468 * ->r_result isn't set and __complete_request() isn't called. 4469 */ 4470 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 4471 { 4472 struct ceph_osd_client *osdc = req->r_osdc; 4473 4474 down_write(&osdc->lock); 4475 if (req->r_osd) 4476 cancel_request(req); 4477 up_write(&osdc->lock); 4478 } 4479 EXPORT_SYMBOL(ceph_osdc_cancel_request); 4480 4481 /* 4482 * @timeout: in jiffies, 0 means "wait forever" 4483 */ 4484 static int wait_request_timeout(struct ceph_osd_request *req, 4485 unsigned long timeout) 4486 { 4487 long left; 4488 4489 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 4490 left = wait_for_completion_killable_timeout(&req->r_completion, 4491 ceph_timeout_jiffies(timeout)); 4492 if (left <= 0) { 4493 left = left ?: -ETIMEDOUT; 4494 ceph_osdc_cancel_request(req); 4495 } else { 4496 left = req->r_result; /* completed */ 4497 } 4498 4499 return left; 4500 } 4501 4502 /* 4503 * wait for a request to complete 4504 */ 4505 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 4506 struct ceph_osd_request *req) 4507 { 4508 return wait_request_timeout(req, 0); 4509 } 4510 EXPORT_SYMBOL(ceph_osdc_wait_request); 4511 4512 /* 4513 * sync - wait for all in-flight requests to flush. avoid starvation. 4514 */ 4515 void ceph_osdc_sync(struct ceph_osd_client *osdc) 4516 { 4517 struct rb_node *n, *p; 4518 u64 last_tid = atomic64_read(&osdc->last_tid); 4519 4520 again: 4521 down_read(&osdc->lock); 4522 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 4523 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 4524 4525 mutex_lock(&osd->lock); 4526 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 4527 struct ceph_osd_request *req = 4528 rb_entry(p, struct ceph_osd_request, r_node); 4529 4530 if (req->r_tid > last_tid) 4531 break; 4532 4533 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 4534 continue; 4535 4536 ceph_osdc_get_request(req); 4537 mutex_unlock(&osd->lock); 4538 up_read(&osdc->lock); 4539 dout("%s waiting on req %p tid %llu last_tid %llu\n", 4540 __func__, req, req->r_tid, last_tid); 4541 wait_for_completion(&req->r_completion); 4542 ceph_osdc_put_request(req); 4543 goto again; 4544 } 4545 4546 mutex_unlock(&osd->lock); 4547 } 4548 4549 up_read(&osdc->lock); 4550 dout("%s done last_tid %llu\n", __func__, last_tid); 4551 } 4552 EXPORT_SYMBOL(ceph_osdc_sync); 4553 4554 static struct ceph_osd_request * 4555 alloc_linger_request(struct ceph_osd_linger_request *lreq) 4556 { 4557 struct ceph_osd_request *req; 4558 4559 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 4560 if (!req) 4561 return NULL; 4562 4563 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4564 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4565 return req; 4566 } 4567 4568 static struct ceph_osd_request * 4569 alloc_watch_request(struct ceph_osd_linger_request *lreq, u8 watch_opcode) 4570 { 4571 struct ceph_osd_request *req; 4572 4573 req = alloc_linger_request(lreq); 4574 if (!req) 4575 return NULL; 4576 4577 /* 4578 * Pass 0 for cookie because we don't know it yet, it will be 4579 * filled in by linger_submit(). 4580 */ 4581 osd_req_op_watch_init(req, 0, 0, watch_opcode); 4582 4583 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 4584 ceph_osdc_put_request(req); 4585 return NULL; 4586 } 4587 4588 return req; 4589 } 4590 4591 /* 4592 * Returns a handle, caller owns a ref. 4593 */ 4594 struct ceph_osd_linger_request * 4595 ceph_osdc_watch(struct ceph_osd_client *osdc, 4596 struct ceph_object_id *oid, 4597 struct ceph_object_locator *oloc, 4598 rados_watchcb2_t wcb, 4599 rados_watcherrcb_t errcb, 4600 void *data) 4601 { 4602 struct ceph_osd_linger_request *lreq; 4603 int ret; 4604 4605 lreq = linger_alloc(osdc); 4606 if (!lreq) 4607 return ERR_PTR(-ENOMEM); 4608 4609 lreq->is_watch = true; 4610 lreq->wcb = wcb; 4611 lreq->errcb = errcb; 4612 lreq->data = data; 4613 lreq->watch_valid_thru = jiffies; 4614 4615 ceph_oid_copy(&lreq->t.base_oid, oid); 4616 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4617 lreq->t.flags = CEPH_OSD_FLAG_WRITE; 4618 ktime_get_real_ts64(&lreq->mtime); 4619 4620 lreq->reg_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_WATCH); 4621 if (!lreq->reg_req) { 4622 ret = -ENOMEM; 4623 goto err_put_lreq; 4624 } 4625 4626 lreq->ping_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_PING); 4627 if (!lreq->ping_req) { 4628 ret = -ENOMEM; 4629 goto err_put_lreq; 4630 } 4631 4632 linger_submit(lreq); 4633 ret = linger_reg_commit_wait(lreq); 4634 if (ret) { 4635 linger_cancel(lreq); 4636 goto err_put_lreq; 4637 } 4638 4639 return lreq; 4640 4641 err_put_lreq: 4642 linger_put(lreq); 4643 return ERR_PTR(ret); 4644 } 4645 EXPORT_SYMBOL(ceph_osdc_watch); 4646 4647 /* 4648 * Releases a ref. 4649 * 4650 * Times out after mount_timeout to preserve rbd unmap behaviour 4651 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 4652 * with mount_timeout"). 4653 */ 4654 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 4655 struct ceph_osd_linger_request *lreq) 4656 { 4657 struct ceph_options *opts = osdc->client->options; 4658 struct ceph_osd_request *req; 4659 int ret; 4660 4661 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4662 if (!req) 4663 return -ENOMEM; 4664 4665 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4666 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4667 req->r_flags = CEPH_OSD_FLAG_WRITE; 4668 ktime_get_real_ts64(&req->r_mtime); 4669 osd_req_op_watch_init(req, 0, lreq->linger_id, 4670 CEPH_OSD_WATCH_OP_UNWATCH); 4671 4672 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4673 if (ret) 4674 goto out_put_req; 4675 4676 ceph_osdc_start_request(osdc, req, false); 4677 linger_cancel(lreq); 4678 linger_put(lreq); 4679 ret = wait_request_timeout(req, opts->mount_timeout); 4680 4681 out_put_req: 4682 ceph_osdc_put_request(req); 4683 return ret; 4684 } 4685 EXPORT_SYMBOL(ceph_osdc_unwatch); 4686 4687 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 4688 u64 notify_id, u64 cookie, void *payload, 4689 u32 payload_len) 4690 { 4691 struct ceph_osd_req_op *op; 4692 struct ceph_pagelist *pl; 4693 int ret; 4694 4695 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 4696 4697 pl = ceph_pagelist_alloc(GFP_NOIO); 4698 if (!pl) 4699 return -ENOMEM; 4700 4701 ret = ceph_pagelist_encode_64(pl, notify_id); 4702 ret |= ceph_pagelist_encode_64(pl, cookie); 4703 if (payload) { 4704 ret |= ceph_pagelist_encode_32(pl, payload_len); 4705 ret |= ceph_pagelist_append(pl, payload, payload_len); 4706 } else { 4707 ret |= ceph_pagelist_encode_32(pl, 0); 4708 } 4709 if (ret) { 4710 ceph_pagelist_release(pl); 4711 return -ENOMEM; 4712 } 4713 4714 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 4715 op->indata_len = pl->length; 4716 return 0; 4717 } 4718 4719 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 4720 struct ceph_object_id *oid, 4721 struct ceph_object_locator *oloc, 4722 u64 notify_id, 4723 u64 cookie, 4724 void *payload, 4725 u32 payload_len) 4726 { 4727 struct ceph_osd_request *req; 4728 int ret; 4729 4730 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4731 if (!req) 4732 return -ENOMEM; 4733 4734 ceph_oid_copy(&req->r_base_oid, oid); 4735 ceph_oloc_copy(&req->r_base_oloc, oloc); 4736 req->r_flags = CEPH_OSD_FLAG_READ; 4737 4738 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 4739 payload_len); 4740 if (ret) 4741 goto out_put_req; 4742 4743 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4744 if (ret) 4745 goto out_put_req; 4746 4747 ceph_osdc_start_request(osdc, req, false); 4748 ret = ceph_osdc_wait_request(osdc, req); 4749 4750 out_put_req: 4751 ceph_osdc_put_request(req); 4752 return ret; 4753 } 4754 EXPORT_SYMBOL(ceph_osdc_notify_ack); 4755 4756 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 4757 u64 cookie, u32 prot_ver, u32 timeout, 4758 void *payload, u32 payload_len) 4759 { 4760 struct ceph_osd_req_op *op; 4761 struct ceph_pagelist *pl; 4762 int ret; 4763 4764 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 4765 op->notify.cookie = cookie; 4766 4767 pl = ceph_pagelist_alloc(GFP_NOIO); 4768 if (!pl) 4769 return -ENOMEM; 4770 4771 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 4772 ret |= ceph_pagelist_encode_32(pl, timeout); 4773 ret |= ceph_pagelist_encode_32(pl, payload_len); 4774 ret |= ceph_pagelist_append(pl, payload, payload_len); 4775 if (ret) { 4776 ceph_pagelist_release(pl); 4777 return -ENOMEM; 4778 } 4779 4780 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 4781 op->indata_len = pl->length; 4782 return 0; 4783 } 4784 4785 /* 4786 * @timeout: in seconds 4787 * 4788 * @preply_{pages,len} are initialized both on success and error. 4789 * The caller is responsible for: 4790 * 4791 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 4792 */ 4793 int ceph_osdc_notify(struct ceph_osd_client *osdc, 4794 struct ceph_object_id *oid, 4795 struct ceph_object_locator *oloc, 4796 void *payload, 4797 u32 payload_len, 4798 u32 timeout, 4799 struct page ***preply_pages, 4800 size_t *preply_len) 4801 { 4802 struct ceph_osd_linger_request *lreq; 4803 struct page **pages; 4804 int ret; 4805 4806 WARN_ON(!timeout); 4807 if (preply_pages) { 4808 *preply_pages = NULL; 4809 *preply_len = 0; 4810 } 4811 4812 lreq = linger_alloc(osdc); 4813 if (!lreq) 4814 return -ENOMEM; 4815 4816 lreq->preply_pages = preply_pages; 4817 lreq->preply_len = preply_len; 4818 4819 ceph_oid_copy(&lreq->t.base_oid, oid); 4820 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4821 lreq->t.flags = CEPH_OSD_FLAG_READ; 4822 4823 lreq->reg_req = alloc_linger_request(lreq); 4824 if (!lreq->reg_req) { 4825 ret = -ENOMEM; 4826 goto out_put_lreq; 4827 } 4828 4829 /* 4830 * Pass 0 for cookie because we don't know it yet, it will be 4831 * filled in by linger_submit(). 4832 */ 4833 ret = osd_req_op_notify_init(lreq->reg_req, 0, 0, 1, timeout, 4834 payload, payload_len); 4835 if (ret) 4836 goto out_put_lreq; 4837 4838 /* for notify_id */ 4839 pages = ceph_alloc_page_vector(1, GFP_NOIO); 4840 if (IS_ERR(pages)) { 4841 ret = PTR_ERR(pages); 4842 goto out_put_lreq; 4843 } 4844 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 4845 response_data), 4846 pages, PAGE_SIZE, 0, false, true); 4847 4848 ret = ceph_osdc_alloc_messages(lreq->reg_req, GFP_NOIO); 4849 if (ret) 4850 goto out_put_lreq; 4851 4852 linger_submit(lreq); 4853 ret = linger_reg_commit_wait(lreq); 4854 if (!ret) 4855 ret = linger_notify_finish_wait(lreq); 4856 else 4857 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 4858 4859 linger_cancel(lreq); 4860 out_put_lreq: 4861 linger_put(lreq); 4862 return ret; 4863 } 4864 EXPORT_SYMBOL(ceph_osdc_notify); 4865 4866 /* 4867 * Return the number of milliseconds since the watch was last 4868 * confirmed, or an error. If there is an error, the watch is no 4869 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 4870 */ 4871 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 4872 struct ceph_osd_linger_request *lreq) 4873 { 4874 unsigned long stamp, age; 4875 int ret; 4876 4877 down_read(&osdc->lock); 4878 mutex_lock(&lreq->lock); 4879 stamp = lreq->watch_valid_thru; 4880 if (!list_empty(&lreq->pending_lworks)) { 4881 struct linger_work *lwork = 4882 list_first_entry(&lreq->pending_lworks, 4883 struct linger_work, 4884 pending_item); 4885 4886 if (time_before(lwork->queued_stamp, stamp)) 4887 stamp = lwork->queued_stamp; 4888 } 4889 age = jiffies - stamp; 4890 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 4891 lreq, lreq->linger_id, age, lreq->last_error); 4892 /* we are truncating to msecs, so return a safe upper bound */ 4893 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 4894 4895 mutex_unlock(&lreq->lock); 4896 up_read(&osdc->lock); 4897 return ret; 4898 } 4899 4900 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 4901 { 4902 u8 struct_v; 4903 u32 struct_len; 4904 int ret; 4905 4906 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 4907 &struct_v, &struct_len); 4908 if (ret) 4909 goto bad; 4910 4911 ret = -EINVAL; 4912 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad); 4913 ceph_decode_64_safe(p, end, item->cookie, bad); 4914 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */ 4915 4916 if (struct_v >= 2) { 4917 ret = ceph_decode_entity_addr(p, end, &item->addr); 4918 if (ret) 4919 goto bad; 4920 } else { 4921 ret = 0; 4922 } 4923 4924 dout("%s %s%llu cookie %llu addr %s\n", __func__, 4925 ENTITY_NAME(item->name), item->cookie, 4926 ceph_pr_addr(&item->addr)); 4927 bad: 4928 return ret; 4929 } 4930 4931 static int decode_watchers(void **p, void *end, 4932 struct ceph_watch_item **watchers, 4933 u32 *num_watchers) 4934 { 4935 u8 struct_v; 4936 u32 struct_len; 4937 int i; 4938 int ret; 4939 4940 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 4941 &struct_v, &struct_len); 4942 if (ret) 4943 return ret; 4944 4945 *num_watchers = ceph_decode_32(p); 4946 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 4947 if (!*watchers) 4948 return -ENOMEM; 4949 4950 for (i = 0; i < *num_watchers; i++) { 4951 ret = decode_watcher(p, end, *watchers + i); 4952 if (ret) { 4953 kfree(*watchers); 4954 return ret; 4955 } 4956 } 4957 4958 return 0; 4959 } 4960 4961 /* 4962 * On success, the caller is responsible for: 4963 * 4964 * kfree(watchers); 4965 */ 4966 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 4967 struct ceph_object_id *oid, 4968 struct ceph_object_locator *oloc, 4969 struct ceph_watch_item **watchers, 4970 u32 *num_watchers) 4971 { 4972 struct ceph_osd_request *req; 4973 struct page **pages; 4974 int ret; 4975 4976 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4977 if (!req) 4978 return -ENOMEM; 4979 4980 ceph_oid_copy(&req->r_base_oid, oid); 4981 ceph_oloc_copy(&req->r_base_oloc, oloc); 4982 req->r_flags = CEPH_OSD_FLAG_READ; 4983 4984 pages = ceph_alloc_page_vector(1, GFP_NOIO); 4985 if (IS_ERR(pages)) { 4986 ret = PTR_ERR(pages); 4987 goto out_put_req; 4988 } 4989 4990 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 4991 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 4992 response_data), 4993 pages, PAGE_SIZE, 0, false, true); 4994 4995 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4996 if (ret) 4997 goto out_put_req; 4998 4999 ceph_osdc_start_request(osdc, req, false); 5000 ret = ceph_osdc_wait_request(osdc, req); 5001 if (ret >= 0) { 5002 void *p = page_address(pages[0]); 5003 void *const end = p + req->r_ops[0].outdata_len; 5004 5005 ret = decode_watchers(&p, end, watchers, num_watchers); 5006 } 5007 5008 out_put_req: 5009 ceph_osdc_put_request(req); 5010 return ret; 5011 } 5012 EXPORT_SYMBOL(ceph_osdc_list_watchers); 5013 5014 /* 5015 * Call all pending notify callbacks - for use after a watch is 5016 * unregistered, to make sure no more callbacks for it will be invoked 5017 */ 5018 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 5019 { 5020 dout("%s osdc %p\n", __func__, osdc); 5021 flush_workqueue(osdc->notify_wq); 5022 } 5023 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 5024 5025 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 5026 { 5027 down_read(&osdc->lock); 5028 maybe_request_map(osdc); 5029 up_read(&osdc->lock); 5030 } 5031 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 5032 5033 /* 5034 * Execute an OSD class method on an object. 5035 * 5036 * @flags: CEPH_OSD_FLAG_* 5037 * @resp_len: in/out param for reply length 5038 */ 5039 int ceph_osdc_call(struct ceph_osd_client *osdc, 5040 struct ceph_object_id *oid, 5041 struct ceph_object_locator *oloc, 5042 const char *class, const char *method, 5043 unsigned int flags, 5044 struct page *req_page, size_t req_len, 5045 struct page **resp_pages, size_t *resp_len) 5046 { 5047 struct ceph_osd_request *req; 5048 int ret; 5049 5050 if (req_len > PAGE_SIZE) 5051 return -E2BIG; 5052 5053 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 5054 if (!req) 5055 return -ENOMEM; 5056 5057 ceph_oid_copy(&req->r_base_oid, oid); 5058 ceph_oloc_copy(&req->r_base_oloc, oloc); 5059 req->r_flags = flags; 5060 5061 ret = osd_req_op_cls_init(req, 0, class, method); 5062 if (ret) 5063 goto out_put_req; 5064 5065 if (req_page) 5066 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 5067 0, false, false); 5068 if (resp_pages) 5069 osd_req_op_cls_response_data_pages(req, 0, resp_pages, 5070 *resp_len, 0, false, false); 5071 5072 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 5073 if (ret) 5074 goto out_put_req; 5075 5076 ceph_osdc_start_request(osdc, req, false); 5077 ret = ceph_osdc_wait_request(osdc, req); 5078 if (ret >= 0) { 5079 ret = req->r_ops[0].rval; 5080 if (resp_pages) 5081 *resp_len = req->r_ops[0].outdata_len; 5082 } 5083 5084 out_put_req: 5085 ceph_osdc_put_request(req); 5086 return ret; 5087 } 5088 EXPORT_SYMBOL(ceph_osdc_call); 5089 5090 /* 5091 * init, shutdown 5092 */ 5093 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 5094 { 5095 int err; 5096 5097 dout("init\n"); 5098 osdc->client = client; 5099 init_rwsem(&osdc->lock); 5100 osdc->osds = RB_ROOT; 5101 INIT_LIST_HEAD(&osdc->osd_lru); 5102 spin_lock_init(&osdc->osd_lru_lock); 5103 osd_init(&osdc->homeless_osd); 5104 osdc->homeless_osd.o_osdc = osdc; 5105 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 5106 osdc->last_linger_id = CEPH_LINGER_ID_START; 5107 osdc->linger_requests = RB_ROOT; 5108 osdc->map_checks = RB_ROOT; 5109 osdc->linger_map_checks = RB_ROOT; 5110 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 5111 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 5112 5113 err = -ENOMEM; 5114 osdc->osdmap = ceph_osdmap_alloc(); 5115 if (!osdc->osdmap) 5116 goto out; 5117 5118 osdc->req_mempool = mempool_create_slab_pool(10, 5119 ceph_osd_request_cache); 5120 if (!osdc->req_mempool) 5121 goto out_map; 5122 5123 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 5124 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op"); 5125 if (err < 0) 5126 goto out_mempool; 5127 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 5128 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, 5129 "osd_op_reply"); 5130 if (err < 0) 5131 goto out_msgpool; 5132 5133 err = -ENOMEM; 5134 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 5135 if (!osdc->notify_wq) 5136 goto out_msgpool_reply; 5137 5138 osdc->completion_wq = create_singlethread_workqueue("ceph-completion"); 5139 if (!osdc->completion_wq) 5140 goto out_notify_wq; 5141 5142 schedule_delayed_work(&osdc->timeout_work, 5143 osdc->client->options->osd_keepalive_timeout); 5144 schedule_delayed_work(&osdc->osds_timeout_work, 5145 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 5146 5147 return 0; 5148 5149 out_notify_wq: 5150 destroy_workqueue(osdc->notify_wq); 5151 out_msgpool_reply: 5152 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5153 out_msgpool: 5154 ceph_msgpool_destroy(&osdc->msgpool_op); 5155 out_mempool: 5156 mempool_destroy(osdc->req_mempool); 5157 out_map: 5158 ceph_osdmap_destroy(osdc->osdmap); 5159 out: 5160 return err; 5161 } 5162 5163 void ceph_osdc_stop(struct ceph_osd_client *osdc) 5164 { 5165 destroy_workqueue(osdc->completion_wq); 5166 destroy_workqueue(osdc->notify_wq); 5167 cancel_delayed_work_sync(&osdc->timeout_work); 5168 cancel_delayed_work_sync(&osdc->osds_timeout_work); 5169 5170 down_write(&osdc->lock); 5171 while (!RB_EMPTY_ROOT(&osdc->osds)) { 5172 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 5173 struct ceph_osd, o_node); 5174 close_osd(osd); 5175 } 5176 up_write(&osdc->lock); 5177 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1); 5178 osd_cleanup(&osdc->homeless_osd); 5179 5180 WARN_ON(!list_empty(&osdc->osd_lru)); 5181 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 5182 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 5183 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 5184 WARN_ON(atomic_read(&osdc->num_requests)); 5185 WARN_ON(atomic_read(&osdc->num_homeless)); 5186 5187 ceph_osdmap_destroy(osdc->osdmap); 5188 mempool_destroy(osdc->req_mempool); 5189 ceph_msgpool_destroy(&osdc->msgpool_op); 5190 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5191 } 5192 5193 /* 5194 * Read some contiguous pages. If we cross a stripe boundary, shorten 5195 * *plen. Return number of bytes read, or error. 5196 */ 5197 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 5198 struct ceph_vino vino, struct ceph_file_layout *layout, 5199 u64 off, u64 *plen, 5200 u32 truncate_seq, u64 truncate_size, 5201 struct page **pages, int num_pages, int page_align) 5202 { 5203 struct ceph_osd_request *req; 5204 int rc = 0; 5205 5206 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 5207 vino.snap, off, *plen); 5208 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 5209 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 5210 NULL, truncate_seq, truncate_size, 5211 false); 5212 if (IS_ERR(req)) 5213 return PTR_ERR(req); 5214 5215 /* it may be a short read due to an object boundary */ 5216 osd_req_op_extent_osd_data_pages(req, 0, 5217 pages, *plen, page_align, false, false); 5218 5219 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 5220 off, *plen, *plen, page_align); 5221 5222 rc = ceph_osdc_start_request(osdc, req, false); 5223 if (!rc) 5224 rc = ceph_osdc_wait_request(osdc, req); 5225 5226 ceph_osdc_put_request(req); 5227 dout("readpages result %d\n", rc); 5228 return rc; 5229 } 5230 EXPORT_SYMBOL(ceph_osdc_readpages); 5231 5232 /* 5233 * do a synchronous write on N pages 5234 */ 5235 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 5236 struct ceph_file_layout *layout, 5237 struct ceph_snap_context *snapc, 5238 u64 off, u64 len, 5239 u32 truncate_seq, u64 truncate_size, 5240 struct timespec64 *mtime, 5241 struct page **pages, int num_pages) 5242 { 5243 struct ceph_osd_request *req; 5244 int rc = 0; 5245 int page_align = off & ~PAGE_MASK; 5246 5247 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 5248 CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, 5249 snapc, truncate_seq, truncate_size, 5250 true); 5251 if (IS_ERR(req)) 5252 return PTR_ERR(req); 5253 5254 /* it may be a short write due to an object boundary */ 5255 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 5256 false, false); 5257 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 5258 5259 req->r_mtime = *mtime; 5260 rc = ceph_osdc_start_request(osdc, req, true); 5261 if (!rc) 5262 rc = ceph_osdc_wait_request(osdc, req); 5263 5264 ceph_osdc_put_request(req); 5265 if (rc == 0) 5266 rc = len; 5267 dout("writepages result %d\n", rc); 5268 return rc; 5269 } 5270 EXPORT_SYMBOL(ceph_osdc_writepages); 5271 5272 static int osd_req_op_copy_from_init(struct ceph_osd_request *req, 5273 u64 src_snapid, u64 src_version, 5274 struct ceph_object_id *src_oid, 5275 struct ceph_object_locator *src_oloc, 5276 u32 src_fadvise_flags, 5277 u32 dst_fadvise_flags, 5278 u8 copy_from_flags) 5279 { 5280 struct ceph_osd_req_op *op; 5281 struct page **pages; 5282 void *p, *end; 5283 5284 pages = ceph_alloc_page_vector(1, GFP_KERNEL); 5285 if (IS_ERR(pages)) 5286 return PTR_ERR(pages); 5287 5288 op = _osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM, dst_fadvise_flags); 5289 op->copy_from.snapid = src_snapid; 5290 op->copy_from.src_version = src_version; 5291 op->copy_from.flags = copy_from_flags; 5292 op->copy_from.src_fadvise_flags = src_fadvise_flags; 5293 5294 p = page_address(pages[0]); 5295 end = p + PAGE_SIZE; 5296 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len); 5297 encode_oloc(&p, end, src_oloc); 5298 op->indata_len = PAGE_SIZE - (end - p); 5299 5300 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages, 5301 op->indata_len, 0, false, true); 5302 return 0; 5303 } 5304 5305 int ceph_osdc_copy_from(struct ceph_osd_client *osdc, 5306 u64 src_snapid, u64 src_version, 5307 struct ceph_object_id *src_oid, 5308 struct ceph_object_locator *src_oloc, 5309 u32 src_fadvise_flags, 5310 struct ceph_object_id *dst_oid, 5311 struct ceph_object_locator *dst_oloc, 5312 u32 dst_fadvise_flags, 5313 u8 copy_from_flags) 5314 { 5315 struct ceph_osd_request *req; 5316 int ret; 5317 5318 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL); 5319 if (!req) 5320 return -ENOMEM; 5321 5322 req->r_flags = CEPH_OSD_FLAG_WRITE; 5323 5324 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc); 5325 ceph_oid_copy(&req->r_t.base_oid, dst_oid); 5326 5327 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid, 5328 src_oloc, src_fadvise_flags, 5329 dst_fadvise_flags, copy_from_flags); 5330 if (ret) 5331 goto out; 5332 5333 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL); 5334 if (ret) 5335 goto out; 5336 5337 ceph_osdc_start_request(osdc, req, false); 5338 ret = ceph_osdc_wait_request(osdc, req); 5339 5340 out: 5341 ceph_osdc_put_request(req); 5342 return ret; 5343 } 5344 EXPORT_SYMBOL(ceph_osdc_copy_from); 5345 5346 int __init ceph_osdc_setup(void) 5347 { 5348 size_t size = sizeof(struct ceph_osd_request) + 5349 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 5350 5351 BUG_ON(ceph_osd_request_cache); 5352 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 5353 0, 0, NULL); 5354 5355 return ceph_osd_request_cache ? 0 : -ENOMEM; 5356 } 5357 5358 void ceph_osdc_cleanup(void) 5359 { 5360 BUG_ON(!ceph_osd_request_cache); 5361 kmem_cache_destroy(ceph_osd_request_cache); 5362 ceph_osd_request_cache = NULL; 5363 } 5364 5365 /* 5366 * handle incoming message 5367 */ 5368 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 5369 { 5370 struct ceph_osd *osd = con->private; 5371 struct ceph_osd_client *osdc = osd->o_osdc; 5372 int type = le16_to_cpu(msg->hdr.type); 5373 5374 switch (type) { 5375 case CEPH_MSG_OSD_MAP: 5376 ceph_osdc_handle_map(osdc, msg); 5377 break; 5378 case CEPH_MSG_OSD_OPREPLY: 5379 handle_reply(osd, msg); 5380 break; 5381 case CEPH_MSG_OSD_BACKOFF: 5382 handle_backoff(osd, msg); 5383 break; 5384 case CEPH_MSG_WATCH_NOTIFY: 5385 handle_watch_notify(osdc, msg); 5386 break; 5387 5388 default: 5389 pr_err("received unknown message type %d %s\n", type, 5390 ceph_msg_type_name(type)); 5391 } 5392 5393 ceph_msg_put(msg); 5394 } 5395 5396 /* 5397 * Lookup and return message for incoming reply. Don't try to do 5398 * anything about a larger than preallocated data portion of the 5399 * message at the moment - for now, just skip the message. 5400 */ 5401 static struct ceph_msg *get_reply(struct ceph_connection *con, 5402 struct ceph_msg_header *hdr, 5403 int *skip) 5404 { 5405 struct ceph_osd *osd = con->private; 5406 struct ceph_osd_client *osdc = osd->o_osdc; 5407 struct ceph_msg *m = NULL; 5408 struct ceph_osd_request *req; 5409 int front_len = le32_to_cpu(hdr->front_len); 5410 int data_len = le32_to_cpu(hdr->data_len); 5411 u64 tid = le64_to_cpu(hdr->tid); 5412 5413 down_read(&osdc->lock); 5414 if (!osd_registered(osd)) { 5415 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 5416 *skip = 1; 5417 goto out_unlock_osdc; 5418 } 5419 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 5420 5421 mutex_lock(&osd->lock); 5422 req = lookup_request(&osd->o_requests, tid); 5423 if (!req) { 5424 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 5425 osd->o_osd, tid); 5426 *skip = 1; 5427 goto out_unlock_session; 5428 } 5429 5430 ceph_msg_revoke_incoming(req->r_reply); 5431 5432 if (front_len > req->r_reply->front_alloc_len) { 5433 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 5434 __func__, osd->o_osd, req->r_tid, front_len, 5435 req->r_reply->front_alloc_len); 5436 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 5437 false); 5438 if (!m) 5439 goto out_unlock_session; 5440 ceph_msg_put(req->r_reply); 5441 req->r_reply = m; 5442 } 5443 5444 if (data_len > req->r_reply->data_length) { 5445 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 5446 __func__, osd->o_osd, req->r_tid, data_len, 5447 req->r_reply->data_length); 5448 m = NULL; 5449 *skip = 1; 5450 goto out_unlock_session; 5451 } 5452 5453 m = ceph_msg_get(req->r_reply); 5454 dout("get_reply tid %lld %p\n", tid, m); 5455 5456 out_unlock_session: 5457 mutex_unlock(&osd->lock); 5458 out_unlock_osdc: 5459 up_read(&osdc->lock); 5460 return m; 5461 } 5462 5463 /* 5464 * TODO: switch to a msg-owned pagelist 5465 */ 5466 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 5467 { 5468 struct ceph_msg *m; 5469 int type = le16_to_cpu(hdr->type); 5470 u32 front_len = le32_to_cpu(hdr->front_len); 5471 u32 data_len = le32_to_cpu(hdr->data_len); 5472 5473 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false); 5474 if (!m) 5475 return NULL; 5476 5477 if (data_len) { 5478 struct page **pages; 5479 struct ceph_osd_data osd_data; 5480 5481 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 5482 GFP_NOIO); 5483 if (IS_ERR(pages)) { 5484 ceph_msg_put(m); 5485 return NULL; 5486 } 5487 5488 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false, 5489 false); 5490 ceph_osdc_msg_data_add(m, &osd_data); 5491 } 5492 5493 return m; 5494 } 5495 5496 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 5497 struct ceph_msg_header *hdr, 5498 int *skip) 5499 { 5500 struct ceph_osd *osd = con->private; 5501 int type = le16_to_cpu(hdr->type); 5502 5503 *skip = 0; 5504 switch (type) { 5505 case CEPH_MSG_OSD_MAP: 5506 case CEPH_MSG_OSD_BACKOFF: 5507 case CEPH_MSG_WATCH_NOTIFY: 5508 return alloc_msg_with_page_vector(hdr); 5509 case CEPH_MSG_OSD_OPREPLY: 5510 return get_reply(con, hdr, skip); 5511 default: 5512 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 5513 osd->o_osd, type); 5514 *skip = 1; 5515 return NULL; 5516 } 5517 } 5518 5519 /* 5520 * Wrappers to refcount containing ceph_osd struct 5521 */ 5522 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 5523 { 5524 struct ceph_osd *osd = con->private; 5525 if (get_osd(osd)) 5526 return con; 5527 return NULL; 5528 } 5529 5530 static void put_osd_con(struct ceph_connection *con) 5531 { 5532 struct ceph_osd *osd = con->private; 5533 put_osd(osd); 5534 } 5535 5536 /* 5537 * authentication 5538 */ 5539 /* 5540 * Note: returned pointer is the address of a structure that's 5541 * managed separately. Caller must *not* attempt to free it. 5542 */ 5543 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 5544 int *proto, int force_new) 5545 { 5546 struct ceph_osd *o = con->private; 5547 struct ceph_osd_client *osdc = o->o_osdc; 5548 struct ceph_auth_client *ac = osdc->client->monc.auth; 5549 struct ceph_auth_handshake *auth = &o->o_auth; 5550 5551 if (force_new && auth->authorizer) { 5552 ceph_auth_destroy_authorizer(auth->authorizer); 5553 auth->authorizer = NULL; 5554 } 5555 if (!auth->authorizer) { 5556 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5557 auth); 5558 if (ret) 5559 return ERR_PTR(ret); 5560 } else { 5561 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5562 auth); 5563 if (ret) 5564 return ERR_PTR(ret); 5565 } 5566 *proto = ac->protocol; 5567 5568 return auth; 5569 } 5570 5571 static int add_authorizer_challenge(struct ceph_connection *con, 5572 void *challenge_buf, int challenge_buf_len) 5573 { 5574 struct ceph_osd *o = con->private; 5575 struct ceph_osd_client *osdc = o->o_osdc; 5576 struct ceph_auth_client *ac = osdc->client->monc.auth; 5577 5578 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer, 5579 challenge_buf, challenge_buf_len); 5580 } 5581 5582 static int verify_authorizer_reply(struct ceph_connection *con) 5583 { 5584 struct ceph_osd *o = con->private; 5585 struct ceph_osd_client *osdc = o->o_osdc; 5586 struct ceph_auth_client *ac = osdc->client->monc.auth; 5587 5588 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer); 5589 } 5590 5591 static int invalidate_authorizer(struct ceph_connection *con) 5592 { 5593 struct ceph_osd *o = con->private; 5594 struct ceph_osd_client *osdc = o->o_osdc; 5595 struct ceph_auth_client *ac = osdc->client->monc.auth; 5596 5597 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 5598 return ceph_monc_validate_auth(&osdc->client->monc); 5599 } 5600 5601 static void osd_reencode_message(struct ceph_msg *msg) 5602 { 5603 int type = le16_to_cpu(msg->hdr.type); 5604 5605 if (type == CEPH_MSG_OSD_OP) 5606 encode_request_finish(msg); 5607 } 5608 5609 static int osd_sign_message(struct ceph_msg *msg) 5610 { 5611 struct ceph_osd *o = msg->con->private; 5612 struct ceph_auth_handshake *auth = &o->o_auth; 5613 5614 return ceph_auth_sign_message(auth, msg); 5615 } 5616 5617 static int osd_check_message_signature(struct ceph_msg *msg) 5618 { 5619 struct ceph_osd *o = msg->con->private; 5620 struct ceph_auth_handshake *auth = &o->o_auth; 5621 5622 return ceph_auth_check_message_signature(auth, msg); 5623 } 5624 5625 static const struct ceph_connection_operations osd_con_ops = { 5626 .get = get_osd_con, 5627 .put = put_osd_con, 5628 .dispatch = dispatch, 5629 .get_authorizer = get_authorizer, 5630 .add_authorizer_challenge = add_authorizer_challenge, 5631 .verify_authorizer_reply = verify_authorizer_reply, 5632 .invalidate_authorizer = invalidate_authorizer, 5633 .alloc_msg = alloc_msg, 5634 .reencode_message = osd_reencode_message, 5635 .sign_message = osd_sign_message, 5636 .check_message_signature = osd_check_message_signature, 5637 .fault = osd_fault, 5638 }; 5639