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_FROM2: 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 dest->recovery_deletes = src->recovery_deletes; 449 450 dest->flags = src->flags; 451 dest->used_replica = src->used_replica; 452 dest->paused = src->paused; 453 454 dest->epoch = src->epoch; 455 dest->last_force_resend = src->last_force_resend; 456 457 dest->osd = src->osd; 458 } 459 460 static void target_destroy(struct ceph_osd_request_target *t) 461 { 462 ceph_oid_destroy(&t->base_oid); 463 ceph_oloc_destroy(&t->base_oloc); 464 ceph_oid_destroy(&t->target_oid); 465 ceph_oloc_destroy(&t->target_oloc); 466 } 467 468 /* 469 * requests 470 */ 471 static void request_release_checks(struct ceph_osd_request *req) 472 { 473 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 474 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node)); 475 WARN_ON(!list_empty(&req->r_private_item)); 476 WARN_ON(req->r_osd); 477 } 478 479 static void ceph_osdc_release_request(struct kref *kref) 480 { 481 struct ceph_osd_request *req = container_of(kref, 482 struct ceph_osd_request, r_kref); 483 unsigned int which; 484 485 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 486 req->r_request, req->r_reply); 487 request_release_checks(req); 488 489 if (req->r_request) 490 ceph_msg_put(req->r_request); 491 if (req->r_reply) 492 ceph_msg_put(req->r_reply); 493 494 for (which = 0; which < req->r_num_ops; which++) 495 osd_req_op_data_release(req, which); 496 497 target_destroy(&req->r_t); 498 ceph_put_snap_context(req->r_snapc); 499 500 if (req->r_mempool) 501 mempool_free(req, req->r_osdc->req_mempool); 502 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) 503 kmem_cache_free(ceph_osd_request_cache, req); 504 else 505 kfree(req); 506 } 507 508 void ceph_osdc_get_request(struct ceph_osd_request *req) 509 { 510 dout("%s %p (was %d)\n", __func__, req, 511 kref_read(&req->r_kref)); 512 kref_get(&req->r_kref); 513 } 514 EXPORT_SYMBOL(ceph_osdc_get_request); 515 516 void ceph_osdc_put_request(struct ceph_osd_request *req) 517 { 518 if (req) { 519 dout("%s %p (was %d)\n", __func__, req, 520 kref_read(&req->r_kref)); 521 kref_put(&req->r_kref, ceph_osdc_release_request); 522 } 523 } 524 EXPORT_SYMBOL(ceph_osdc_put_request); 525 526 static void request_init(struct ceph_osd_request *req) 527 { 528 /* req only, each op is zeroed in osd_req_op_init() */ 529 memset(req, 0, sizeof(*req)); 530 531 kref_init(&req->r_kref); 532 init_completion(&req->r_completion); 533 RB_CLEAR_NODE(&req->r_node); 534 RB_CLEAR_NODE(&req->r_mc_node); 535 INIT_LIST_HEAD(&req->r_private_item); 536 537 target_init(&req->r_t); 538 } 539 540 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 541 struct ceph_snap_context *snapc, 542 unsigned int num_ops, 543 bool use_mempool, 544 gfp_t gfp_flags) 545 { 546 struct ceph_osd_request *req; 547 548 if (use_mempool) { 549 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 550 req = mempool_alloc(osdc->req_mempool, gfp_flags); 551 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 552 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 553 } else { 554 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 555 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags); 556 } 557 if (unlikely(!req)) 558 return NULL; 559 560 request_init(req); 561 req->r_osdc = osdc; 562 req->r_mempool = use_mempool; 563 req->r_num_ops = num_ops; 564 req->r_snapid = CEPH_NOSNAP; 565 req->r_snapc = ceph_get_snap_context(snapc); 566 567 dout("%s req %p\n", __func__, req); 568 return req; 569 } 570 EXPORT_SYMBOL(ceph_osdc_alloc_request); 571 572 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc) 573 { 574 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); 575 } 576 577 static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp, 578 int num_request_data_items, 579 int num_reply_data_items) 580 { 581 struct ceph_osd_client *osdc = req->r_osdc; 582 struct ceph_msg *msg; 583 int msg_size; 584 585 WARN_ON(req->r_request || req->r_reply); 586 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 587 WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); 588 589 /* create request message */ 590 msg_size = CEPH_ENCODING_START_BLK_LEN + 591 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 592 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */ 593 msg_size += CEPH_ENCODING_START_BLK_LEN + 594 sizeof(struct ceph_osd_reqid); /* reqid */ 595 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */ 596 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */ 597 msg_size += CEPH_ENCODING_START_BLK_LEN + 598 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 599 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 600 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 601 msg_size += 8; /* snapid */ 602 msg_size += 8; /* snap_seq */ 603 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 604 msg_size += 4 + 8; /* retry_attempt, features */ 605 606 if (req->r_mempool) 607 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size, 608 num_request_data_items); 609 else 610 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size, 611 num_request_data_items, gfp, true); 612 if (!msg) 613 return -ENOMEM; 614 615 memset(msg->front.iov_base, 0, msg->front.iov_len); 616 req->r_request = msg; 617 618 /* create reply message */ 619 msg_size = OSD_OPREPLY_FRONT_LEN; 620 msg_size += req->r_base_oid.name_len; 621 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 622 623 if (req->r_mempool) 624 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size, 625 num_reply_data_items); 626 else 627 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size, 628 num_reply_data_items, gfp, true); 629 if (!msg) 630 return -ENOMEM; 631 632 req->r_reply = msg; 633 634 return 0; 635 } 636 637 static bool osd_req_opcode_valid(u16 opcode) 638 { 639 switch (opcode) { 640 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 641 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 642 #undef GENERATE_CASE 643 default: 644 return false; 645 } 646 } 647 648 static void get_num_data_items(struct ceph_osd_request *req, 649 int *num_request_data_items, 650 int *num_reply_data_items) 651 { 652 struct ceph_osd_req_op *op; 653 654 *num_request_data_items = 0; 655 *num_reply_data_items = 0; 656 657 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { 658 switch (op->op) { 659 /* request */ 660 case CEPH_OSD_OP_WRITE: 661 case CEPH_OSD_OP_WRITEFULL: 662 case CEPH_OSD_OP_SETXATTR: 663 case CEPH_OSD_OP_CMPXATTR: 664 case CEPH_OSD_OP_NOTIFY_ACK: 665 case CEPH_OSD_OP_COPY_FROM2: 666 *num_request_data_items += 1; 667 break; 668 669 /* reply */ 670 case CEPH_OSD_OP_STAT: 671 case CEPH_OSD_OP_READ: 672 case CEPH_OSD_OP_LIST_WATCHERS: 673 *num_reply_data_items += 1; 674 break; 675 676 /* both */ 677 case CEPH_OSD_OP_NOTIFY: 678 *num_request_data_items += 1; 679 *num_reply_data_items += 1; 680 break; 681 case CEPH_OSD_OP_CALL: 682 *num_request_data_items += 2; 683 *num_reply_data_items += 1; 684 break; 685 686 default: 687 WARN_ON(!osd_req_opcode_valid(op->op)); 688 break; 689 } 690 } 691 } 692 693 /* 694 * oid, oloc and OSD op opcode(s) must be filled in before this function 695 * is called. 696 */ 697 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 698 { 699 int num_request_data_items, num_reply_data_items; 700 701 get_num_data_items(req, &num_request_data_items, &num_reply_data_items); 702 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items, 703 num_reply_data_items); 704 } 705 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 706 707 /* 708 * This is an osd op init function for opcodes that have no data or 709 * other information associated with them. It also serves as a 710 * common init routine for all the other init functions, below. 711 */ 712 struct ceph_osd_req_op * 713 osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 714 u16 opcode, u32 flags) 715 { 716 struct ceph_osd_req_op *op; 717 718 BUG_ON(which >= osd_req->r_num_ops); 719 BUG_ON(!osd_req_opcode_valid(opcode)); 720 721 op = &osd_req->r_ops[which]; 722 memset(op, 0, sizeof (*op)); 723 op->op = opcode; 724 op->flags = flags; 725 726 return op; 727 } 728 EXPORT_SYMBOL(osd_req_op_init); 729 730 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 731 unsigned int which, u16 opcode, 732 u64 offset, u64 length, 733 u64 truncate_size, u32 truncate_seq) 734 { 735 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, 736 opcode, 0); 737 size_t payload_len = 0; 738 739 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 740 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 741 opcode != CEPH_OSD_OP_TRUNCATE); 742 743 op->extent.offset = offset; 744 op->extent.length = length; 745 op->extent.truncate_size = truncate_size; 746 op->extent.truncate_seq = truncate_seq; 747 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 748 payload_len += length; 749 750 op->indata_len = payload_len; 751 } 752 EXPORT_SYMBOL(osd_req_op_extent_init); 753 754 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 755 unsigned int which, u64 length) 756 { 757 struct ceph_osd_req_op *op; 758 u64 previous; 759 760 BUG_ON(which >= osd_req->r_num_ops); 761 op = &osd_req->r_ops[which]; 762 previous = op->extent.length; 763 764 if (length == previous) 765 return; /* Nothing to do */ 766 BUG_ON(length > previous); 767 768 op->extent.length = length; 769 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 770 op->indata_len -= previous - length; 771 } 772 EXPORT_SYMBOL(osd_req_op_extent_update); 773 774 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 775 unsigned int which, u64 offset_inc) 776 { 777 struct ceph_osd_req_op *op, *prev_op; 778 779 BUG_ON(which + 1 >= osd_req->r_num_ops); 780 781 prev_op = &osd_req->r_ops[which]; 782 op = osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 783 /* dup previous one */ 784 op->indata_len = prev_op->indata_len; 785 op->outdata_len = prev_op->outdata_len; 786 op->extent = prev_op->extent; 787 /* adjust offset */ 788 op->extent.offset += offset_inc; 789 op->extent.length -= offset_inc; 790 791 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 792 op->indata_len -= offset_inc; 793 } 794 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 795 796 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 797 const char *class, const char *method) 798 { 799 struct ceph_osd_req_op *op; 800 struct ceph_pagelist *pagelist; 801 size_t payload_len = 0; 802 size_t size; 803 int ret; 804 805 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0); 806 807 pagelist = ceph_pagelist_alloc(GFP_NOFS); 808 if (!pagelist) 809 return -ENOMEM; 810 811 op->cls.class_name = class; 812 size = strlen(class); 813 BUG_ON(size > (size_t) U8_MAX); 814 op->cls.class_len = size; 815 ret = ceph_pagelist_append(pagelist, class, size); 816 if (ret) 817 goto err_pagelist_free; 818 payload_len += size; 819 820 op->cls.method_name = method; 821 size = strlen(method); 822 BUG_ON(size > (size_t) U8_MAX); 823 op->cls.method_len = size; 824 ret = ceph_pagelist_append(pagelist, method, size); 825 if (ret) 826 goto err_pagelist_free; 827 payload_len += size; 828 829 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 830 op->indata_len = payload_len; 831 return 0; 832 833 err_pagelist_free: 834 ceph_pagelist_release(pagelist); 835 return ret; 836 } 837 EXPORT_SYMBOL(osd_req_op_cls_init); 838 839 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 840 u16 opcode, const char *name, const void *value, 841 size_t size, u8 cmp_op, u8 cmp_mode) 842 { 843 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, 844 opcode, 0); 845 struct ceph_pagelist *pagelist; 846 size_t payload_len; 847 int ret; 848 849 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 850 851 pagelist = ceph_pagelist_alloc(GFP_NOFS); 852 if (!pagelist) 853 return -ENOMEM; 854 855 payload_len = strlen(name); 856 op->xattr.name_len = payload_len; 857 ret = ceph_pagelist_append(pagelist, name, payload_len); 858 if (ret) 859 goto err_pagelist_free; 860 861 op->xattr.value_len = size; 862 ret = ceph_pagelist_append(pagelist, value, size); 863 if (ret) 864 goto err_pagelist_free; 865 payload_len += size; 866 867 op->xattr.cmp_op = cmp_op; 868 op->xattr.cmp_mode = cmp_mode; 869 870 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 871 op->indata_len = payload_len; 872 return 0; 873 874 err_pagelist_free: 875 ceph_pagelist_release(pagelist); 876 return ret; 877 } 878 EXPORT_SYMBOL(osd_req_op_xattr_init); 879 880 /* 881 * @watch_opcode: CEPH_OSD_WATCH_OP_* 882 */ 883 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 884 u8 watch_opcode, u64 cookie, u32 gen) 885 { 886 struct ceph_osd_req_op *op; 887 888 op = osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 889 op->watch.cookie = cookie; 890 op->watch.op = watch_opcode; 891 op->watch.gen = gen; 892 } 893 894 /* 895 * prot_ver, timeout and notify payload (may be empty) should already be 896 * encoded in @request_pl 897 */ 898 static void osd_req_op_notify_init(struct ceph_osd_request *req, int which, 899 u64 cookie, struct ceph_pagelist *request_pl) 900 { 901 struct ceph_osd_req_op *op; 902 903 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 904 op->notify.cookie = cookie; 905 906 ceph_osd_data_pagelist_init(&op->notify.request_data, request_pl); 907 op->indata_len = request_pl->length; 908 } 909 910 /* 911 * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_* 912 */ 913 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 914 unsigned int which, 915 u64 expected_object_size, 916 u64 expected_write_size, 917 u32 flags) 918 { 919 struct ceph_osd_req_op *op; 920 921 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_SETALLOCHINT, 0); 922 op->alloc_hint.expected_object_size = expected_object_size; 923 op->alloc_hint.expected_write_size = expected_write_size; 924 op->alloc_hint.flags = flags; 925 926 /* 927 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 928 * not worth a feature bit. Set FAILOK per-op flag to make 929 * sure older osds don't trip over an unsupported opcode. 930 */ 931 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 932 } 933 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 934 935 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 936 struct ceph_osd_data *osd_data) 937 { 938 u64 length = ceph_osd_data_length(osd_data); 939 940 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 941 BUG_ON(length > (u64) SIZE_MAX); 942 if (length) 943 ceph_msg_data_add_pages(msg, osd_data->pages, 944 length, osd_data->alignment, false); 945 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 946 BUG_ON(!length); 947 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 948 #ifdef CONFIG_BLOCK 949 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 950 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length); 951 #endif 952 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) { 953 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos); 954 } else { 955 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 956 } 957 } 958 959 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 960 const struct ceph_osd_req_op *src) 961 { 962 switch (src->op) { 963 case CEPH_OSD_OP_STAT: 964 break; 965 case CEPH_OSD_OP_READ: 966 case CEPH_OSD_OP_WRITE: 967 case CEPH_OSD_OP_WRITEFULL: 968 case CEPH_OSD_OP_ZERO: 969 case CEPH_OSD_OP_TRUNCATE: 970 dst->extent.offset = cpu_to_le64(src->extent.offset); 971 dst->extent.length = cpu_to_le64(src->extent.length); 972 dst->extent.truncate_size = 973 cpu_to_le64(src->extent.truncate_size); 974 dst->extent.truncate_seq = 975 cpu_to_le32(src->extent.truncate_seq); 976 break; 977 case CEPH_OSD_OP_CALL: 978 dst->cls.class_len = src->cls.class_len; 979 dst->cls.method_len = src->cls.method_len; 980 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 981 break; 982 case CEPH_OSD_OP_WATCH: 983 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 984 dst->watch.ver = cpu_to_le64(0); 985 dst->watch.op = src->watch.op; 986 dst->watch.gen = cpu_to_le32(src->watch.gen); 987 break; 988 case CEPH_OSD_OP_NOTIFY_ACK: 989 break; 990 case CEPH_OSD_OP_NOTIFY: 991 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 992 break; 993 case CEPH_OSD_OP_LIST_WATCHERS: 994 break; 995 case CEPH_OSD_OP_SETALLOCHINT: 996 dst->alloc_hint.expected_object_size = 997 cpu_to_le64(src->alloc_hint.expected_object_size); 998 dst->alloc_hint.expected_write_size = 999 cpu_to_le64(src->alloc_hint.expected_write_size); 1000 dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags); 1001 break; 1002 case CEPH_OSD_OP_SETXATTR: 1003 case CEPH_OSD_OP_CMPXATTR: 1004 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 1005 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 1006 dst->xattr.cmp_op = src->xattr.cmp_op; 1007 dst->xattr.cmp_mode = src->xattr.cmp_mode; 1008 break; 1009 case CEPH_OSD_OP_CREATE: 1010 case CEPH_OSD_OP_DELETE: 1011 break; 1012 case CEPH_OSD_OP_COPY_FROM2: 1013 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid); 1014 dst->copy_from.src_version = 1015 cpu_to_le64(src->copy_from.src_version); 1016 dst->copy_from.flags = src->copy_from.flags; 1017 dst->copy_from.src_fadvise_flags = 1018 cpu_to_le32(src->copy_from.src_fadvise_flags); 1019 break; 1020 default: 1021 pr_err("unsupported osd opcode %s\n", 1022 ceph_osd_op_name(src->op)); 1023 WARN_ON(1); 1024 1025 return 0; 1026 } 1027 1028 dst->op = cpu_to_le16(src->op); 1029 dst->flags = cpu_to_le32(src->flags); 1030 dst->payload_len = cpu_to_le32(src->indata_len); 1031 1032 return src->indata_len; 1033 } 1034 1035 /* 1036 * build new request AND message, calculate layout, and adjust file 1037 * extent as needed. 1038 * 1039 * if the file was recently truncated, we include information about its 1040 * old and new size so that the object can be updated appropriately. (we 1041 * avoid synchronously deleting truncated objects because it's slow.) 1042 */ 1043 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 1044 struct ceph_file_layout *layout, 1045 struct ceph_vino vino, 1046 u64 off, u64 *plen, 1047 unsigned int which, int num_ops, 1048 int opcode, int flags, 1049 struct ceph_snap_context *snapc, 1050 u32 truncate_seq, 1051 u64 truncate_size, 1052 bool use_mempool) 1053 { 1054 struct ceph_osd_request *req; 1055 u64 objnum = 0; 1056 u64 objoff = 0; 1057 u64 objlen = 0; 1058 int r; 1059 1060 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 1061 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 1062 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 1063 1064 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 1065 GFP_NOFS); 1066 if (!req) { 1067 r = -ENOMEM; 1068 goto fail; 1069 } 1070 1071 /* calculate max write size */ 1072 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 1073 if (r) 1074 goto fail; 1075 1076 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 1077 osd_req_op_init(req, which, opcode, 0); 1078 } else { 1079 u32 object_size = layout->object_size; 1080 u32 object_base = off - objoff; 1081 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 1082 if (truncate_size <= object_base) { 1083 truncate_size = 0; 1084 } else { 1085 truncate_size -= object_base; 1086 if (truncate_size > object_size) 1087 truncate_size = object_size; 1088 } 1089 } 1090 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 1091 truncate_size, truncate_seq); 1092 } 1093 1094 req->r_base_oloc.pool = layout->pool_id; 1095 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); 1096 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 1097 req->r_flags = flags | osdc->client->options->read_from_replica; 1098 1099 req->r_snapid = vino.snap; 1100 if (flags & CEPH_OSD_FLAG_WRITE) 1101 req->r_data_offset = off; 1102 1103 if (num_ops > 1) 1104 /* 1105 * This is a special case for ceph_writepages_start(), but it 1106 * also covers ceph_uninline_data(). If more multi-op request 1107 * use cases emerge, we will need a separate helper. 1108 */ 1109 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0); 1110 else 1111 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 1112 if (r) 1113 goto fail; 1114 1115 return req; 1116 1117 fail: 1118 ceph_osdc_put_request(req); 1119 return ERR_PTR(r); 1120 } 1121 EXPORT_SYMBOL(ceph_osdc_new_request); 1122 1123 /* 1124 * We keep osd requests in an rbtree, sorted by ->r_tid. 1125 */ 1126 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 1127 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 1128 1129 /* 1130 * Call @fn on each OSD request as long as @fn returns 0. 1131 */ 1132 static void for_each_request(struct ceph_osd_client *osdc, 1133 int (*fn)(struct ceph_osd_request *req, void *arg), 1134 void *arg) 1135 { 1136 struct rb_node *n, *p; 1137 1138 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 1139 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 1140 1141 for (p = rb_first(&osd->o_requests); p; ) { 1142 struct ceph_osd_request *req = 1143 rb_entry(p, struct ceph_osd_request, r_node); 1144 1145 p = rb_next(p); 1146 if (fn(req, arg)) 1147 return; 1148 } 1149 } 1150 1151 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 1152 struct ceph_osd_request *req = 1153 rb_entry(p, struct ceph_osd_request, r_node); 1154 1155 p = rb_next(p); 1156 if (fn(req, arg)) 1157 return; 1158 } 1159 } 1160 1161 static bool osd_homeless(struct ceph_osd *osd) 1162 { 1163 return osd->o_osd == CEPH_HOMELESS_OSD; 1164 } 1165 1166 static bool osd_registered(struct ceph_osd *osd) 1167 { 1168 verify_osdc_locked(osd->o_osdc); 1169 1170 return !RB_EMPTY_NODE(&osd->o_node); 1171 } 1172 1173 /* 1174 * Assumes @osd is zero-initialized. 1175 */ 1176 static void osd_init(struct ceph_osd *osd) 1177 { 1178 refcount_set(&osd->o_ref, 1); 1179 RB_CLEAR_NODE(&osd->o_node); 1180 osd->o_requests = RB_ROOT; 1181 osd->o_linger_requests = RB_ROOT; 1182 osd->o_backoff_mappings = RB_ROOT; 1183 osd->o_backoffs_by_id = RB_ROOT; 1184 INIT_LIST_HEAD(&osd->o_osd_lru); 1185 INIT_LIST_HEAD(&osd->o_keepalive_item); 1186 osd->o_incarnation = 1; 1187 mutex_init(&osd->lock); 1188 } 1189 1190 static void osd_cleanup(struct ceph_osd *osd) 1191 { 1192 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1193 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1194 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1195 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings)); 1196 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id)); 1197 WARN_ON(!list_empty(&osd->o_osd_lru)); 1198 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1199 1200 if (osd->o_auth.authorizer) { 1201 WARN_ON(osd_homeless(osd)); 1202 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1203 } 1204 } 1205 1206 /* 1207 * Track open sessions with osds. 1208 */ 1209 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1210 { 1211 struct ceph_osd *osd; 1212 1213 WARN_ON(onum == CEPH_HOMELESS_OSD); 1214 1215 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1216 osd_init(osd); 1217 osd->o_osdc = osdc; 1218 osd->o_osd = onum; 1219 1220 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1221 1222 return osd; 1223 } 1224 1225 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1226 { 1227 if (refcount_inc_not_zero(&osd->o_ref)) { 1228 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1, 1229 refcount_read(&osd->o_ref)); 1230 return osd; 1231 } else { 1232 dout("get_osd %p FAIL\n", osd); 1233 return NULL; 1234 } 1235 } 1236 1237 static void put_osd(struct ceph_osd *osd) 1238 { 1239 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref), 1240 refcount_read(&osd->o_ref) - 1); 1241 if (refcount_dec_and_test(&osd->o_ref)) { 1242 osd_cleanup(osd); 1243 kfree(osd); 1244 } 1245 } 1246 1247 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1248 1249 static void __move_osd_to_lru(struct ceph_osd *osd) 1250 { 1251 struct ceph_osd_client *osdc = osd->o_osdc; 1252 1253 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1254 BUG_ON(!list_empty(&osd->o_osd_lru)); 1255 1256 spin_lock(&osdc->osd_lru_lock); 1257 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1258 spin_unlock(&osdc->osd_lru_lock); 1259 1260 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1261 } 1262 1263 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1264 { 1265 if (RB_EMPTY_ROOT(&osd->o_requests) && 1266 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1267 __move_osd_to_lru(osd); 1268 } 1269 1270 static void __remove_osd_from_lru(struct ceph_osd *osd) 1271 { 1272 struct ceph_osd_client *osdc = osd->o_osdc; 1273 1274 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1275 1276 spin_lock(&osdc->osd_lru_lock); 1277 if (!list_empty(&osd->o_osd_lru)) 1278 list_del_init(&osd->o_osd_lru); 1279 spin_unlock(&osdc->osd_lru_lock); 1280 } 1281 1282 /* 1283 * Close the connection and assign any leftover requests to the 1284 * homeless session. 1285 */ 1286 static void close_osd(struct ceph_osd *osd) 1287 { 1288 struct ceph_osd_client *osdc = osd->o_osdc; 1289 struct rb_node *n; 1290 1291 verify_osdc_wrlocked(osdc); 1292 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1293 1294 ceph_con_close(&osd->o_con); 1295 1296 for (n = rb_first(&osd->o_requests); n; ) { 1297 struct ceph_osd_request *req = 1298 rb_entry(n, struct ceph_osd_request, r_node); 1299 1300 n = rb_next(n); /* unlink_request() */ 1301 1302 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1303 unlink_request(osd, req); 1304 link_request(&osdc->homeless_osd, req); 1305 } 1306 for (n = rb_first(&osd->o_linger_requests); n; ) { 1307 struct ceph_osd_linger_request *lreq = 1308 rb_entry(n, struct ceph_osd_linger_request, node); 1309 1310 n = rb_next(n); /* unlink_linger() */ 1311 1312 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1313 lreq->linger_id); 1314 unlink_linger(osd, lreq); 1315 link_linger(&osdc->homeless_osd, lreq); 1316 } 1317 clear_backoffs(osd); 1318 1319 __remove_osd_from_lru(osd); 1320 erase_osd(&osdc->osds, osd); 1321 put_osd(osd); 1322 } 1323 1324 /* 1325 * reset osd connect 1326 */ 1327 static int reopen_osd(struct ceph_osd *osd) 1328 { 1329 struct ceph_entity_addr *peer_addr; 1330 1331 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1332 1333 if (RB_EMPTY_ROOT(&osd->o_requests) && 1334 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1335 close_osd(osd); 1336 return -ENODEV; 1337 } 1338 1339 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1340 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1341 !ceph_con_opened(&osd->o_con)) { 1342 struct rb_node *n; 1343 1344 dout("osd addr hasn't changed and connection never opened, " 1345 "letting msgr retry\n"); 1346 /* touch each r_stamp for handle_timeout()'s benfit */ 1347 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1348 struct ceph_osd_request *req = 1349 rb_entry(n, struct ceph_osd_request, r_node); 1350 req->r_stamp = jiffies; 1351 } 1352 1353 return -EAGAIN; 1354 } 1355 1356 ceph_con_close(&osd->o_con); 1357 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1358 osd->o_incarnation++; 1359 1360 return 0; 1361 } 1362 1363 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1364 bool wrlocked) 1365 { 1366 struct ceph_osd *osd; 1367 1368 if (wrlocked) 1369 verify_osdc_wrlocked(osdc); 1370 else 1371 verify_osdc_locked(osdc); 1372 1373 if (o != CEPH_HOMELESS_OSD) 1374 osd = lookup_osd(&osdc->osds, o); 1375 else 1376 osd = &osdc->homeless_osd; 1377 if (!osd) { 1378 if (!wrlocked) 1379 return ERR_PTR(-EAGAIN); 1380 1381 osd = create_osd(osdc, o); 1382 insert_osd(&osdc->osds, osd); 1383 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1384 &osdc->osdmap->osd_addr[osd->o_osd]); 1385 } 1386 1387 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1388 return osd; 1389 } 1390 1391 /* 1392 * Create request <-> OSD session relation. 1393 * 1394 * @req has to be assigned a tid, @osd may be homeless. 1395 */ 1396 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1397 { 1398 verify_osd_locked(osd); 1399 WARN_ON(!req->r_tid || req->r_osd); 1400 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1401 req, req->r_tid); 1402 1403 if (!osd_homeless(osd)) 1404 __remove_osd_from_lru(osd); 1405 else 1406 atomic_inc(&osd->o_osdc->num_homeless); 1407 1408 get_osd(osd); 1409 insert_request(&osd->o_requests, req); 1410 req->r_osd = osd; 1411 } 1412 1413 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1414 { 1415 verify_osd_locked(osd); 1416 WARN_ON(req->r_osd != osd); 1417 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1418 req, req->r_tid); 1419 1420 req->r_osd = NULL; 1421 erase_request(&osd->o_requests, req); 1422 put_osd(osd); 1423 1424 if (!osd_homeless(osd)) 1425 maybe_move_osd_to_lru(osd); 1426 else 1427 atomic_dec(&osd->o_osdc->num_homeless); 1428 } 1429 1430 static bool __pool_full(struct ceph_pg_pool_info *pi) 1431 { 1432 return pi->flags & CEPH_POOL_FLAG_FULL; 1433 } 1434 1435 static bool have_pool_full(struct ceph_osd_client *osdc) 1436 { 1437 struct rb_node *n; 1438 1439 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1440 struct ceph_pg_pool_info *pi = 1441 rb_entry(n, struct ceph_pg_pool_info, node); 1442 1443 if (__pool_full(pi)) 1444 return true; 1445 } 1446 1447 return false; 1448 } 1449 1450 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1451 { 1452 struct ceph_pg_pool_info *pi; 1453 1454 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1455 if (!pi) 1456 return false; 1457 1458 return __pool_full(pi); 1459 } 1460 1461 /* 1462 * Returns whether a request should be blocked from being sent 1463 * based on the current osdmap and osd_client settings. 1464 */ 1465 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1466 const struct ceph_osd_request_target *t, 1467 struct ceph_pg_pool_info *pi) 1468 { 1469 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1470 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1471 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1472 __pool_full(pi); 1473 1474 WARN_ON(pi->id != t->target_oloc.pool); 1475 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) || 1476 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) || 1477 (osdc->osdmap->epoch < osdc->epoch_barrier); 1478 } 1479 1480 static int pick_random_replica(const struct ceph_osds *acting) 1481 { 1482 int i = prandom_u32() % acting->size; 1483 1484 dout("%s picked osd%d, primary osd%d\n", __func__, 1485 acting->osds[i], acting->primary); 1486 return i; 1487 } 1488 1489 /* 1490 * Picks the closest replica based on client's location given by 1491 * crush_location option. Prefers the primary if the locality is 1492 * the same. 1493 */ 1494 static int pick_closest_replica(struct ceph_osd_client *osdc, 1495 const struct ceph_osds *acting) 1496 { 1497 struct ceph_options *opt = osdc->client->options; 1498 int best_i, best_locality; 1499 int i = 0, locality; 1500 1501 do { 1502 locality = ceph_get_crush_locality(osdc->osdmap, 1503 acting->osds[i], 1504 &opt->crush_locs); 1505 if (i == 0 || 1506 (locality >= 0 && best_locality < 0) || 1507 (locality >= 0 && best_locality >= 0 && 1508 locality < best_locality)) { 1509 best_i = i; 1510 best_locality = locality; 1511 } 1512 } while (++i < acting->size); 1513 1514 dout("%s picked osd%d with locality %d, primary osd%d\n", __func__, 1515 acting->osds[best_i], best_locality, acting->primary); 1516 return best_i; 1517 } 1518 1519 enum calc_target_result { 1520 CALC_TARGET_NO_ACTION = 0, 1521 CALC_TARGET_NEED_RESEND, 1522 CALC_TARGET_POOL_DNE, 1523 }; 1524 1525 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1526 struct ceph_osd_request_target *t, 1527 bool any_change) 1528 { 1529 struct ceph_pg_pool_info *pi; 1530 struct ceph_pg pgid, last_pgid; 1531 struct ceph_osds up, acting; 1532 bool is_read = t->flags & CEPH_OSD_FLAG_READ; 1533 bool is_write = t->flags & CEPH_OSD_FLAG_WRITE; 1534 bool force_resend = false; 1535 bool unpaused = false; 1536 bool legacy_change = false; 1537 bool split = false; 1538 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1539 bool recovery_deletes = ceph_osdmap_flag(osdc, 1540 CEPH_OSDMAP_RECOVERY_DELETES); 1541 enum calc_target_result ct_res; 1542 1543 t->epoch = osdc->osdmap->epoch; 1544 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1545 if (!pi) { 1546 t->osd = CEPH_HOMELESS_OSD; 1547 ct_res = CALC_TARGET_POOL_DNE; 1548 goto out; 1549 } 1550 1551 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1552 if (t->last_force_resend < pi->last_force_request_resend) { 1553 t->last_force_resend = pi->last_force_request_resend; 1554 force_resend = true; 1555 } else if (t->last_force_resend == 0) { 1556 force_resend = true; 1557 } 1558 } 1559 1560 /* apply tiering */ 1561 ceph_oid_copy(&t->target_oid, &t->base_oid); 1562 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1563 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1564 if (is_read && pi->read_tier >= 0) 1565 t->target_oloc.pool = pi->read_tier; 1566 if (is_write && pi->write_tier >= 0) 1567 t->target_oloc.pool = pi->write_tier; 1568 1569 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool); 1570 if (!pi) { 1571 t->osd = CEPH_HOMELESS_OSD; 1572 ct_res = CALC_TARGET_POOL_DNE; 1573 goto out; 1574 } 1575 } 1576 1577 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid); 1578 last_pgid.pool = pgid.pool; 1579 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1580 1581 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting); 1582 if (any_change && 1583 ceph_is_new_interval(&t->acting, 1584 &acting, 1585 &t->up, 1586 &up, 1587 t->size, 1588 pi->size, 1589 t->min_size, 1590 pi->min_size, 1591 t->pg_num, 1592 pi->pg_num, 1593 t->sort_bitwise, 1594 sort_bitwise, 1595 t->recovery_deletes, 1596 recovery_deletes, 1597 &last_pgid)) 1598 force_resend = true; 1599 1600 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1601 t->paused = false; 1602 unpaused = true; 1603 } 1604 legacy_change = ceph_pg_compare(&t->pgid, &pgid) || 1605 ceph_osds_changed(&t->acting, &acting, 1606 t->used_replica || any_change); 1607 if (t->pg_num) 1608 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num); 1609 1610 if (legacy_change || force_resend || split) { 1611 t->pgid = pgid; /* struct */ 1612 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid); 1613 ceph_osds_copy(&t->acting, &acting); 1614 ceph_osds_copy(&t->up, &up); 1615 t->size = pi->size; 1616 t->min_size = pi->min_size; 1617 t->pg_num = pi->pg_num; 1618 t->pg_num_mask = pi->pg_num_mask; 1619 t->sort_bitwise = sort_bitwise; 1620 t->recovery_deletes = recovery_deletes; 1621 1622 if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS | 1623 CEPH_OSD_FLAG_LOCALIZE_READS)) && 1624 !is_write && pi->type == CEPH_POOL_TYPE_REP && 1625 acting.size > 1) { 1626 int pos; 1627 1628 WARN_ON(!is_read || acting.osds[0] != acting.primary); 1629 if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) { 1630 pos = pick_random_replica(&acting); 1631 } else { 1632 pos = pick_closest_replica(osdc, &acting); 1633 } 1634 t->osd = acting.osds[pos]; 1635 t->used_replica = pos > 0; 1636 } else { 1637 t->osd = acting.primary; 1638 t->used_replica = false; 1639 } 1640 } 1641 1642 if (unpaused || legacy_change || force_resend || split) 1643 ct_res = CALC_TARGET_NEED_RESEND; 1644 else 1645 ct_res = CALC_TARGET_NO_ACTION; 1646 1647 out: 1648 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused, 1649 legacy_change, force_resend, split, ct_res, t->osd); 1650 return ct_res; 1651 } 1652 1653 static struct ceph_spg_mapping *alloc_spg_mapping(void) 1654 { 1655 struct ceph_spg_mapping *spg; 1656 1657 spg = kmalloc(sizeof(*spg), GFP_NOIO); 1658 if (!spg) 1659 return NULL; 1660 1661 RB_CLEAR_NODE(&spg->node); 1662 spg->backoffs = RB_ROOT; 1663 return spg; 1664 } 1665 1666 static void free_spg_mapping(struct ceph_spg_mapping *spg) 1667 { 1668 WARN_ON(!RB_EMPTY_NODE(&spg->node)); 1669 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs)); 1670 1671 kfree(spg); 1672 } 1673 1674 /* 1675 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to 1676 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is 1677 * defined only within a specific spgid; it does not pass anything to 1678 * children on split, or to another primary. 1679 */ 1680 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare, 1681 RB_BYPTR, const struct ceph_spg *, node) 1682 1683 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid) 1684 { 1685 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits; 1686 } 1687 1688 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid, 1689 void **pkey, size_t *pkey_len) 1690 { 1691 if (hoid->key_len) { 1692 *pkey = hoid->key; 1693 *pkey_len = hoid->key_len; 1694 } else { 1695 *pkey = hoid->oid; 1696 *pkey_len = hoid->oid_len; 1697 } 1698 } 1699 1700 static int compare_names(const void *name1, size_t name1_len, 1701 const void *name2, size_t name2_len) 1702 { 1703 int ret; 1704 1705 ret = memcmp(name1, name2, min(name1_len, name2_len)); 1706 if (!ret) { 1707 if (name1_len < name2_len) 1708 ret = -1; 1709 else if (name1_len > name2_len) 1710 ret = 1; 1711 } 1712 return ret; 1713 } 1714 1715 static int hoid_compare(const struct ceph_hobject_id *lhs, 1716 const struct ceph_hobject_id *rhs) 1717 { 1718 void *effective_key1, *effective_key2; 1719 size_t effective_key1_len, effective_key2_len; 1720 int ret; 1721 1722 if (lhs->is_max < rhs->is_max) 1723 return -1; 1724 if (lhs->is_max > rhs->is_max) 1725 return 1; 1726 1727 if (lhs->pool < rhs->pool) 1728 return -1; 1729 if (lhs->pool > rhs->pool) 1730 return 1; 1731 1732 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs)) 1733 return -1; 1734 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs)) 1735 return 1; 1736 1737 ret = compare_names(lhs->nspace, lhs->nspace_len, 1738 rhs->nspace, rhs->nspace_len); 1739 if (ret) 1740 return ret; 1741 1742 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len); 1743 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len); 1744 ret = compare_names(effective_key1, effective_key1_len, 1745 effective_key2, effective_key2_len); 1746 if (ret) 1747 return ret; 1748 1749 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len); 1750 if (ret) 1751 return ret; 1752 1753 if (lhs->snapid < rhs->snapid) 1754 return -1; 1755 if (lhs->snapid > rhs->snapid) 1756 return 1; 1757 1758 return 0; 1759 } 1760 1761 /* 1762 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX 1763 * compat stuff here. 1764 * 1765 * Assumes @hoid is zero-initialized. 1766 */ 1767 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid) 1768 { 1769 u8 struct_v; 1770 u32 struct_len; 1771 int ret; 1772 1773 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v, 1774 &struct_len); 1775 if (ret) 1776 return ret; 1777 1778 if (struct_v < 4) { 1779 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v); 1780 goto e_inval; 1781 } 1782 1783 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len, 1784 GFP_NOIO); 1785 if (IS_ERR(hoid->key)) { 1786 ret = PTR_ERR(hoid->key); 1787 hoid->key = NULL; 1788 return ret; 1789 } 1790 1791 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len, 1792 GFP_NOIO); 1793 if (IS_ERR(hoid->oid)) { 1794 ret = PTR_ERR(hoid->oid); 1795 hoid->oid = NULL; 1796 return ret; 1797 } 1798 1799 ceph_decode_64_safe(p, end, hoid->snapid, e_inval); 1800 ceph_decode_32_safe(p, end, hoid->hash, e_inval); 1801 ceph_decode_8_safe(p, end, hoid->is_max, e_inval); 1802 1803 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len, 1804 GFP_NOIO); 1805 if (IS_ERR(hoid->nspace)) { 1806 ret = PTR_ERR(hoid->nspace); 1807 hoid->nspace = NULL; 1808 return ret; 1809 } 1810 1811 ceph_decode_64_safe(p, end, hoid->pool, e_inval); 1812 1813 ceph_hoid_build_hash_cache(hoid); 1814 return 0; 1815 1816 e_inval: 1817 return -EINVAL; 1818 } 1819 1820 static int hoid_encoding_size(const struct ceph_hobject_id *hoid) 1821 { 1822 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */ 1823 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len; 1824 } 1825 1826 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid) 1827 { 1828 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid)); 1829 ceph_encode_string(p, end, hoid->key, hoid->key_len); 1830 ceph_encode_string(p, end, hoid->oid, hoid->oid_len); 1831 ceph_encode_64(p, hoid->snapid); 1832 ceph_encode_32(p, hoid->hash); 1833 ceph_encode_8(p, hoid->is_max); 1834 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len); 1835 ceph_encode_64(p, hoid->pool); 1836 } 1837 1838 static void free_hoid(struct ceph_hobject_id *hoid) 1839 { 1840 if (hoid) { 1841 kfree(hoid->key); 1842 kfree(hoid->oid); 1843 kfree(hoid->nspace); 1844 kfree(hoid); 1845 } 1846 } 1847 1848 static struct ceph_osd_backoff *alloc_backoff(void) 1849 { 1850 struct ceph_osd_backoff *backoff; 1851 1852 backoff = kzalloc(sizeof(*backoff), GFP_NOIO); 1853 if (!backoff) 1854 return NULL; 1855 1856 RB_CLEAR_NODE(&backoff->spg_node); 1857 RB_CLEAR_NODE(&backoff->id_node); 1858 return backoff; 1859 } 1860 1861 static void free_backoff(struct ceph_osd_backoff *backoff) 1862 { 1863 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node)); 1864 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node)); 1865 1866 free_hoid(backoff->begin); 1867 free_hoid(backoff->end); 1868 kfree(backoff); 1869 } 1870 1871 /* 1872 * Within a specific spgid, backoffs are managed by ->begin hoid. 1873 */ 1874 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare, 1875 RB_BYVAL, spg_node); 1876 1877 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root, 1878 const struct ceph_hobject_id *hoid) 1879 { 1880 struct rb_node *n = root->rb_node; 1881 1882 while (n) { 1883 struct ceph_osd_backoff *cur = 1884 rb_entry(n, struct ceph_osd_backoff, spg_node); 1885 int cmp; 1886 1887 cmp = hoid_compare(hoid, cur->begin); 1888 if (cmp < 0) { 1889 n = n->rb_left; 1890 } else if (cmp > 0) { 1891 if (hoid_compare(hoid, cur->end) < 0) 1892 return cur; 1893 1894 n = n->rb_right; 1895 } else { 1896 return cur; 1897 } 1898 } 1899 1900 return NULL; 1901 } 1902 1903 /* 1904 * Each backoff has a unique id within its OSD session. 1905 */ 1906 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node) 1907 1908 static void clear_backoffs(struct ceph_osd *osd) 1909 { 1910 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) { 1911 struct ceph_spg_mapping *spg = 1912 rb_entry(rb_first(&osd->o_backoff_mappings), 1913 struct ceph_spg_mapping, node); 1914 1915 while (!RB_EMPTY_ROOT(&spg->backoffs)) { 1916 struct ceph_osd_backoff *backoff = 1917 rb_entry(rb_first(&spg->backoffs), 1918 struct ceph_osd_backoff, spg_node); 1919 1920 erase_backoff(&spg->backoffs, backoff); 1921 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 1922 free_backoff(backoff); 1923 } 1924 erase_spg_mapping(&osd->o_backoff_mappings, spg); 1925 free_spg_mapping(spg); 1926 } 1927 } 1928 1929 /* 1930 * Set up a temporary, non-owning view into @t. 1931 */ 1932 static void hoid_fill_from_target(struct ceph_hobject_id *hoid, 1933 const struct ceph_osd_request_target *t) 1934 { 1935 hoid->key = NULL; 1936 hoid->key_len = 0; 1937 hoid->oid = t->target_oid.name; 1938 hoid->oid_len = t->target_oid.name_len; 1939 hoid->snapid = CEPH_NOSNAP; 1940 hoid->hash = t->pgid.seed; 1941 hoid->is_max = false; 1942 if (t->target_oloc.pool_ns) { 1943 hoid->nspace = t->target_oloc.pool_ns->str; 1944 hoid->nspace_len = t->target_oloc.pool_ns->len; 1945 } else { 1946 hoid->nspace = NULL; 1947 hoid->nspace_len = 0; 1948 } 1949 hoid->pool = t->target_oloc.pool; 1950 ceph_hoid_build_hash_cache(hoid); 1951 } 1952 1953 static bool should_plug_request(struct ceph_osd_request *req) 1954 { 1955 struct ceph_osd *osd = req->r_osd; 1956 struct ceph_spg_mapping *spg; 1957 struct ceph_osd_backoff *backoff; 1958 struct ceph_hobject_id hoid; 1959 1960 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid); 1961 if (!spg) 1962 return false; 1963 1964 hoid_fill_from_target(&hoid, &req->r_t); 1965 backoff = lookup_containing_backoff(&spg->backoffs, &hoid); 1966 if (!backoff) 1967 return false; 1968 1969 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n", 1970 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool, 1971 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id); 1972 return true; 1973 } 1974 1975 /* 1976 * Keep get_num_data_items() in sync with this function. 1977 */ 1978 static void setup_request_data(struct ceph_osd_request *req) 1979 { 1980 struct ceph_msg *request_msg = req->r_request; 1981 struct ceph_msg *reply_msg = req->r_reply; 1982 struct ceph_osd_req_op *op; 1983 1984 if (req->r_request->num_data_items || req->r_reply->num_data_items) 1985 return; 1986 1987 WARN_ON(request_msg->data_length || reply_msg->data_length); 1988 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { 1989 switch (op->op) { 1990 /* request */ 1991 case CEPH_OSD_OP_WRITE: 1992 case CEPH_OSD_OP_WRITEFULL: 1993 WARN_ON(op->indata_len != op->extent.length); 1994 ceph_osdc_msg_data_add(request_msg, 1995 &op->extent.osd_data); 1996 break; 1997 case CEPH_OSD_OP_SETXATTR: 1998 case CEPH_OSD_OP_CMPXATTR: 1999 WARN_ON(op->indata_len != op->xattr.name_len + 2000 op->xattr.value_len); 2001 ceph_osdc_msg_data_add(request_msg, 2002 &op->xattr.osd_data); 2003 break; 2004 case CEPH_OSD_OP_NOTIFY_ACK: 2005 ceph_osdc_msg_data_add(request_msg, 2006 &op->notify_ack.request_data); 2007 break; 2008 case CEPH_OSD_OP_COPY_FROM2: 2009 ceph_osdc_msg_data_add(request_msg, 2010 &op->copy_from.osd_data); 2011 break; 2012 2013 /* reply */ 2014 case CEPH_OSD_OP_STAT: 2015 ceph_osdc_msg_data_add(reply_msg, 2016 &op->raw_data_in); 2017 break; 2018 case CEPH_OSD_OP_READ: 2019 ceph_osdc_msg_data_add(reply_msg, 2020 &op->extent.osd_data); 2021 break; 2022 case CEPH_OSD_OP_LIST_WATCHERS: 2023 ceph_osdc_msg_data_add(reply_msg, 2024 &op->list_watchers.response_data); 2025 break; 2026 2027 /* both */ 2028 case CEPH_OSD_OP_CALL: 2029 WARN_ON(op->indata_len != op->cls.class_len + 2030 op->cls.method_len + 2031 op->cls.indata_len); 2032 ceph_osdc_msg_data_add(request_msg, 2033 &op->cls.request_info); 2034 /* optional, can be NONE */ 2035 ceph_osdc_msg_data_add(request_msg, 2036 &op->cls.request_data); 2037 /* optional, can be NONE */ 2038 ceph_osdc_msg_data_add(reply_msg, 2039 &op->cls.response_data); 2040 break; 2041 case CEPH_OSD_OP_NOTIFY: 2042 ceph_osdc_msg_data_add(request_msg, 2043 &op->notify.request_data); 2044 ceph_osdc_msg_data_add(reply_msg, 2045 &op->notify.response_data); 2046 break; 2047 } 2048 } 2049 } 2050 2051 static void encode_pgid(void **p, const struct ceph_pg *pgid) 2052 { 2053 ceph_encode_8(p, 1); 2054 ceph_encode_64(p, pgid->pool); 2055 ceph_encode_32(p, pgid->seed); 2056 ceph_encode_32(p, -1); /* preferred */ 2057 } 2058 2059 static void encode_spgid(void **p, const struct ceph_spg *spgid) 2060 { 2061 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1); 2062 encode_pgid(p, &spgid->pgid); 2063 ceph_encode_8(p, spgid->shard); 2064 } 2065 2066 static void encode_oloc(void **p, void *end, 2067 const struct ceph_object_locator *oloc) 2068 { 2069 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc)); 2070 ceph_encode_64(p, oloc->pool); 2071 ceph_encode_32(p, -1); /* preferred */ 2072 ceph_encode_32(p, 0); /* key len */ 2073 if (oloc->pool_ns) 2074 ceph_encode_string(p, end, oloc->pool_ns->str, 2075 oloc->pool_ns->len); 2076 else 2077 ceph_encode_32(p, 0); 2078 } 2079 2080 static void encode_request_partial(struct ceph_osd_request *req, 2081 struct ceph_msg *msg) 2082 { 2083 void *p = msg->front.iov_base; 2084 void *const end = p + msg->front_alloc_len; 2085 u32 data_len = 0; 2086 int i; 2087 2088 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 2089 /* snapshots aren't writeable */ 2090 WARN_ON(req->r_snapid != CEPH_NOSNAP); 2091 } else { 2092 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 2093 req->r_data_offset || req->r_snapc); 2094 } 2095 2096 setup_request_data(req); 2097 2098 encode_spgid(&p, &req->r_t.spgid); /* actual spg */ 2099 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */ 2100 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 2101 ceph_encode_32(&p, req->r_flags); 2102 2103 /* reqid */ 2104 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid)); 2105 memset(p, 0, sizeof(struct ceph_osd_reqid)); 2106 p += sizeof(struct ceph_osd_reqid); 2107 2108 /* trace */ 2109 memset(p, 0, sizeof(struct ceph_blkin_trace_info)); 2110 p += sizeof(struct ceph_blkin_trace_info); 2111 2112 ceph_encode_32(&p, 0); /* client_inc, always 0 */ 2113 ceph_encode_timespec64(p, &req->r_mtime); 2114 p += sizeof(struct ceph_timespec); 2115 2116 encode_oloc(&p, end, &req->r_t.target_oloc); 2117 ceph_encode_string(&p, end, req->r_t.target_oid.name, 2118 req->r_t.target_oid.name_len); 2119 2120 /* ops, can imply data */ 2121 ceph_encode_16(&p, req->r_num_ops); 2122 for (i = 0; i < req->r_num_ops; i++) { 2123 data_len += osd_req_encode_op(p, &req->r_ops[i]); 2124 p += sizeof(struct ceph_osd_op); 2125 } 2126 2127 ceph_encode_64(&p, req->r_snapid); /* snapid */ 2128 if (req->r_snapc) { 2129 ceph_encode_64(&p, req->r_snapc->seq); 2130 ceph_encode_32(&p, req->r_snapc->num_snaps); 2131 for (i = 0; i < req->r_snapc->num_snaps; i++) 2132 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2133 } else { 2134 ceph_encode_64(&p, 0); /* snap_seq */ 2135 ceph_encode_32(&p, 0); /* snaps len */ 2136 } 2137 2138 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 2139 BUG_ON(p > end - 8); /* space for features */ 2140 2141 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */ 2142 /* front_len is finalized in encode_request_finish() */ 2143 msg->front.iov_len = p - msg->front.iov_base; 2144 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2145 msg->hdr.data_len = cpu_to_le32(data_len); 2146 /* 2147 * The header "data_off" is a hint to the receiver allowing it 2148 * to align received data into its buffers such that there's no 2149 * need to re-copy it before writing it to disk (direct I/O). 2150 */ 2151 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 2152 2153 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg, 2154 req->r_t.target_oid.name, req->r_t.target_oid.name_len); 2155 } 2156 2157 static void encode_request_finish(struct ceph_msg *msg) 2158 { 2159 void *p = msg->front.iov_base; 2160 void *const partial_end = p + msg->front.iov_len; 2161 void *const end = p + msg->front_alloc_len; 2162 2163 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) { 2164 /* luminous OSD -- encode features and be done */ 2165 p = partial_end; 2166 ceph_encode_64(&p, msg->con->peer_features); 2167 } else { 2168 struct { 2169 char spgid[CEPH_ENCODING_START_BLK_LEN + 2170 CEPH_PGID_ENCODING_LEN + 1]; 2171 __le32 hash; 2172 __le32 epoch; 2173 __le32 flags; 2174 char reqid[CEPH_ENCODING_START_BLK_LEN + 2175 sizeof(struct ceph_osd_reqid)]; 2176 char trace[sizeof(struct ceph_blkin_trace_info)]; 2177 __le32 client_inc; 2178 struct ceph_timespec mtime; 2179 } __packed head; 2180 struct ceph_pg pgid; 2181 void *oloc, *oid, *tail; 2182 int oloc_len, oid_len, tail_len; 2183 int len; 2184 2185 /* 2186 * Pre-luminous OSD -- reencode v8 into v4 using @head 2187 * as a temporary buffer. Encode the raw PG; the rest 2188 * is just a matter of moving oloc, oid and tail blobs 2189 * around. 2190 */ 2191 memcpy(&head, p, sizeof(head)); 2192 p += sizeof(head); 2193 2194 oloc = p; 2195 p += CEPH_ENCODING_START_BLK_LEN; 2196 pgid.pool = ceph_decode_64(&p); 2197 p += 4 + 4; /* preferred, key len */ 2198 len = ceph_decode_32(&p); 2199 p += len; /* nspace */ 2200 oloc_len = p - oloc; 2201 2202 oid = p; 2203 len = ceph_decode_32(&p); 2204 p += len; 2205 oid_len = p - oid; 2206 2207 tail = p; 2208 tail_len = partial_end - p; 2209 2210 p = msg->front.iov_base; 2211 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc)); 2212 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch)); 2213 ceph_encode_copy(&p, &head.flags, sizeof(head.flags)); 2214 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime)); 2215 2216 /* reassert_version */ 2217 memset(p, 0, sizeof(struct ceph_eversion)); 2218 p += sizeof(struct ceph_eversion); 2219 2220 BUG_ON(p >= oloc); 2221 memmove(p, oloc, oloc_len); 2222 p += oloc_len; 2223 2224 pgid.seed = le32_to_cpu(head.hash); 2225 encode_pgid(&p, &pgid); /* raw pg */ 2226 2227 BUG_ON(p >= oid); 2228 memmove(p, oid, oid_len); 2229 p += oid_len; 2230 2231 /* tail -- ops, snapid, snapc, retry_attempt */ 2232 BUG_ON(p >= tail); 2233 memmove(p, tail, tail_len); 2234 p += tail_len; 2235 2236 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 2237 } 2238 2239 BUG_ON(p > end); 2240 msg->front.iov_len = p - msg->front.iov_base; 2241 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2242 2243 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg, 2244 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len), 2245 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len), 2246 le16_to_cpu(msg->hdr.version)); 2247 } 2248 2249 /* 2250 * @req has to be assigned a tid and registered. 2251 */ 2252 static void send_request(struct ceph_osd_request *req) 2253 { 2254 struct ceph_osd *osd = req->r_osd; 2255 2256 verify_osd_locked(osd); 2257 WARN_ON(osd->o_osd != req->r_t.osd); 2258 2259 /* backoff? */ 2260 if (should_plug_request(req)) 2261 return; 2262 2263 /* 2264 * We may have a previously queued request message hanging 2265 * around. Cancel it to avoid corrupting the msgr. 2266 */ 2267 if (req->r_sent) 2268 ceph_msg_revoke(req->r_request); 2269 2270 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 2271 if (req->r_attempts) 2272 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2273 else 2274 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 2275 2276 encode_request_partial(req, req->r_request); 2277 2278 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n", 2279 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 2280 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed, 2281 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags, 2282 req->r_attempts); 2283 2284 req->r_t.paused = false; 2285 req->r_stamp = jiffies; 2286 req->r_attempts++; 2287 2288 req->r_sent = osd->o_incarnation; 2289 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 2290 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 2291 } 2292 2293 static void maybe_request_map(struct ceph_osd_client *osdc) 2294 { 2295 bool continuous = false; 2296 2297 verify_osdc_locked(osdc); 2298 WARN_ON(!osdc->osdmap->epoch); 2299 2300 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2301 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 2302 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2303 dout("%s osdc %p continuous\n", __func__, osdc); 2304 continuous = true; 2305 } else { 2306 dout("%s osdc %p onetime\n", __func__, osdc); 2307 } 2308 2309 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 2310 osdc->osdmap->epoch + 1, continuous)) 2311 ceph_monc_renew_subs(&osdc->client->monc); 2312 } 2313 2314 static void complete_request(struct ceph_osd_request *req, int err); 2315 static void send_map_check(struct ceph_osd_request *req); 2316 2317 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 2318 { 2319 struct ceph_osd_client *osdc = req->r_osdc; 2320 struct ceph_osd *osd; 2321 enum calc_target_result ct_res; 2322 int err = 0; 2323 bool need_send = false; 2324 bool promoted = false; 2325 2326 WARN_ON(req->r_tid); 2327 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 2328 2329 again: 2330 ct_res = calc_target(osdc, &req->r_t, false); 2331 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 2332 goto promote; 2333 2334 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 2335 if (IS_ERR(osd)) { 2336 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 2337 goto promote; 2338 } 2339 2340 if (osdc->abort_err) { 2341 dout("req %p abort_err %d\n", req, osdc->abort_err); 2342 err = osdc->abort_err; 2343 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) { 2344 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch, 2345 osdc->epoch_barrier); 2346 req->r_t.paused = true; 2347 maybe_request_map(osdc); 2348 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2349 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2350 dout("req %p pausewr\n", req); 2351 req->r_t.paused = true; 2352 maybe_request_map(osdc); 2353 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 2354 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2355 dout("req %p pauserd\n", req); 2356 req->r_t.paused = true; 2357 maybe_request_map(osdc); 2358 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2359 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 2360 CEPH_OSD_FLAG_FULL_FORCE)) && 2361 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2362 pool_full(osdc, req->r_t.base_oloc.pool))) { 2363 dout("req %p full/pool_full\n", req); 2364 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) { 2365 err = -ENOSPC; 2366 } else { 2367 pr_warn_ratelimited("FULL or reached pool quota\n"); 2368 req->r_t.paused = true; 2369 maybe_request_map(osdc); 2370 } 2371 } else if (!osd_homeless(osd)) { 2372 need_send = true; 2373 } else { 2374 maybe_request_map(osdc); 2375 } 2376 2377 mutex_lock(&osd->lock); 2378 /* 2379 * Assign the tid atomically with send_request() to protect 2380 * multiple writes to the same object from racing with each 2381 * other, resulting in out of order ops on the OSDs. 2382 */ 2383 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2384 link_request(osd, req); 2385 if (need_send) 2386 send_request(req); 2387 else if (err) 2388 complete_request(req, err); 2389 mutex_unlock(&osd->lock); 2390 2391 if (!err && ct_res == CALC_TARGET_POOL_DNE) 2392 send_map_check(req); 2393 2394 if (promoted) 2395 downgrade_write(&osdc->lock); 2396 return; 2397 2398 promote: 2399 up_read(&osdc->lock); 2400 down_write(&osdc->lock); 2401 wrlocked = true; 2402 promoted = true; 2403 goto again; 2404 } 2405 2406 static void account_request(struct ceph_osd_request *req) 2407 { 2408 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK)); 2409 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE))); 2410 2411 req->r_flags |= CEPH_OSD_FLAG_ONDISK; 2412 atomic_inc(&req->r_osdc->num_requests); 2413 2414 req->r_start_stamp = jiffies; 2415 req->r_start_latency = ktime_get(); 2416 } 2417 2418 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 2419 { 2420 ceph_osdc_get_request(req); 2421 account_request(req); 2422 __submit_request(req, wrlocked); 2423 } 2424 2425 static void finish_request(struct ceph_osd_request *req) 2426 { 2427 struct ceph_osd_client *osdc = req->r_osdc; 2428 2429 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 2430 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2431 2432 req->r_end_latency = ktime_get(); 2433 2434 if (req->r_osd) 2435 unlink_request(req->r_osd, req); 2436 atomic_dec(&osdc->num_requests); 2437 2438 /* 2439 * If an OSD has failed or returned and a request has been sent 2440 * twice, it's possible to get a reply and end up here while the 2441 * request message is queued for delivery. We will ignore the 2442 * reply, so not a big deal, but better to try and catch it. 2443 */ 2444 ceph_msg_revoke(req->r_request); 2445 ceph_msg_revoke_incoming(req->r_reply); 2446 } 2447 2448 static void __complete_request(struct ceph_osd_request *req) 2449 { 2450 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req, 2451 req->r_tid, req->r_callback, req->r_result); 2452 2453 if (req->r_callback) 2454 req->r_callback(req); 2455 complete_all(&req->r_completion); 2456 ceph_osdc_put_request(req); 2457 } 2458 2459 static void complete_request_workfn(struct work_struct *work) 2460 { 2461 struct ceph_osd_request *req = 2462 container_of(work, struct ceph_osd_request, r_complete_work); 2463 2464 __complete_request(req); 2465 } 2466 2467 /* 2468 * This is open-coded in handle_reply(). 2469 */ 2470 static void complete_request(struct ceph_osd_request *req, int err) 2471 { 2472 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2473 2474 req->r_result = err; 2475 finish_request(req); 2476 2477 INIT_WORK(&req->r_complete_work, complete_request_workfn); 2478 queue_work(req->r_osdc->completion_wq, &req->r_complete_work); 2479 } 2480 2481 static void cancel_map_check(struct ceph_osd_request *req) 2482 { 2483 struct ceph_osd_client *osdc = req->r_osdc; 2484 struct ceph_osd_request *lookup_req; 2485 2486 verify_osdc_wrlocked(osdc); 2487 2488 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2489 if (!lookup_req) 2490 return; 2491 2492 WARN_ON(lookup_req != req); 2493 erase_request_mc(&osdc->map_checks, req); 2494 ceph_osdc_put_request(req); 2495 } 2496 2497 static void cancel_request(struct ceph_osd_request *req) 2498 { 2499 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2500 2501 cancel_map_check(req); 2502 finish_request(req); 2503 complete_all(&req->r_completion); 2504 ceph_osdc_put_request(req); 2505 } 2506 2507 static void abort_request(struct ceph_osd_request *req, int err) 2508 { 2509 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2510 2511 cancel_map_check(req); 2512 complete_request(req, err); 2513 } 2514 2515 static int abort_fn(struct ceph_osd_request *req, void *arg) 2516 { 2517 int err = *(int *)arg; 2518 2519 abort_request(req, err); 2520 return 0; /* continue iteration */ 2521 } 2522 2523 /* 2524 * Abort all in-flight requests with @err and arrange for all future 2525 * requests to be failed immediately. 2526 */ 2527 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err) 2528 { 2529 dout("%s osdc %p err %d\n", __func__, osdc, err); 2530 down_write(&osdc->lock); 2531 for_each_request(osdc, abort_fn, &err); 2532 osdc->abort_err = err; 2533 up_write(&osdc->lock); 2534 } 2535 EXPORT_SYMBOL(ceph_osdc_abort_requests); 2536 2537 void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc) 2538 { 2539 down_write(&osdc->lock); 2540 osdc->abort_err = 0; 2541 up_write(&osdc->lock); 2542 } 2543 EXPORT_SYMBOL(ceph_osdc_clear_abort_err); 2544 2545 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2546 { 2547 if (likely(eb > osdc->epoch_barrier)) { 2548 dout("updating epoch_barrier from %u to %u\n", 2549 osdc->epoch_barrier, eb); 2550 osdc->epoch_barrier = eb; 2551 /* Request map if we're not to the barrier yet */ 2552 if (eb > osdc->osdmap->epoch) 2553 maybe_request_map(osdc); 2554 } 2555 } 2556 2557 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2558 { 2559 down_read(&osdc->lock); 2560 if (unlikely(eb > osdc->epoch_barrier)) { 2561 up_read(&osdc->lock); 2562 down_write(&osdc->lock); 2563 update_epoch_barrier(osdc, eb); 2564 up_write(&osdc->lock); 2565 } else { 2566 up_read(&osdc->lock); 2567 } 2568 } 2569 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier); 2570 2571 /* 2572 * We can end up releasing caps as a result of abort_request(). 2573 * In that case, we probably want to ensure that the cap release message 2574 * has an updated epoch barrier in it, so set the epoch barrier prior to 2575 * aborting the first request. 2576 */ 2577 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg) 2578 { 2579 struct ceph_osd_client *osdc = req->r_osdc; 2580 bool *victims = arg; 2581 2582 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2583 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2584 pool_full(osdc, req->r_t.base_oloc.pool))) { 2585 if (!*victims) { 2586 update_epoch_barrier(osdc, osdc->osdmap->epoch); 2587 *victims = true; 2588 } 2589 abort_request(req, -ENOSPC); 2590 } 2591 2592 return 0; /* continue iteration */ 2593 } 2594 2595 /* 2596 * Drop all pending requests that are stalled waiting on a full condition to 2597 * clear, and complete them with ENOSPC as the return code. Set the 2598 * osdc->epoch_barrier to the latest map epoch that we've seen if any were 2599 * cancelled. 2600 */ 2601 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc) 2602 { 2603 bool victims = false; 2604 2605 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) && 2606 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc))) 2607 for_each_request(osdc, abort_on_full_fn, &victims); 2608 } 2609 2610 static void check_pool_dne(struct ceph_osd_request *req) 2611 { 2612 struct ceph_osd_client *osdc = req->r_osdc; 2613 struct ceph_osdmap *map = osdc->osdmap; 2614 2615 verify_osdc_wrlocked(osdc); 2616 WARN_ON(!map->epoch); 2617 2618 if (req->r_attempts) { 2619 /* 2620 * We sent a request earlier, which means that 2621 * previously the pool existed, and now it does not 2622 * (i.e., it was deleted). 2623 */ 2624 req->r_map_dne_bound = map->epoch; 2625 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 2626 req->r_tid); 2627 } else { 2628 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 2629 req, req->r_tid, req->r_map_dne_bound, map->epoch); 2630 } 2631 2632 if (req->r_map_dne_bound) { 2633 if (map->epoch >= req->r_map_dne_bound) { 2634 /* we had a new enough map */ 2635 pr_info_ratelimited("tid %llu pool does not exist\n", 2636 req->r_tid); 2637 complete_request(req, -ENOENT); 2638 } 2639 } else { 2640 send_map_check(req); 2641 } 2642 } 2643 2644 static void map_check_cb(struct ceph_mon_generic_request *greq) 2645 { 2646 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2647 struct ceph_osd_request *req; 2648 u64 tid = greq->private_data; 2649 2650 WARN_ON(greq->result || !greq->u.newest); 2651 2652 down_write(&osdc->lock); 2653 req = lookup_request_mc(&osdc->map_checks, tid); 2654 if (!req) { 2655 dout("%s tid %llu dne\n", __func__, tid); 2656 goto out_unlock; 2657 } 2658 2659 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 2660 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 2661 if (!req->r_map_dne_bound) 2662 req->r_map_dne_bound = greq->u.newest; 2663 erase_request_mc(&osdc->map_checks, req); 2664 check_pool_dne(req); 2665 2666 ceph_osdc_put_request(req); 2667 out_unlock: 2668 up_write(&osdc->lock); 2669 } 2670 2671 static void send_map_check(struct ceph_osd_request *req) 2672 { 2673 struct ceph_osd_client *osdc = req->r_osdc; 2674 struct ceph_osd_request *lookup_req; 2675 int ret; 2676 2677 verify_osdc_wrlocked(osdc); 2678 2679 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2680 if (lookup_req) { 2681 WARN_ON(lookup_req != req); 2682 return; 2683 } 2684 2685 ceph_osdc_get_request(req); 2686 insert_request_mc(&osdc->map_checks, req); 2687 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2688 map_check_cb, req->r_tid); 2689 WARN_ON(ret); 2690 } 2691 2692 /* 2693 * lingering requests, watch/notify v2 infrastructure 2694 */ 2695 static void linger_release(struct kref *kref) 2696 { 2697 struct ceph_osd_linger_request *lreq = 2698 container_of(kref, struct ceph_osd_linger_request, kref); 2699 2700 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 2701 lreq->reg_req, lreq->ping_req); 2702 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 2703 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 2704 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 2705 WARN_ON(!list_empty(&lreq->scan_item)); 2706 WARN_ON(!list_empty(&lreq->pending_lworks)); 2707 WARN_ON(lreq->osd); 2708 2709 if (lreq->request_pl) 2710 ceph_pagelist_release(lreq->request_pl); 2711 if (lreq->notify_id_pages) 2712 ceph_release_page_vector(lreq->notify_id_pages, 1); 2713 2714 ceph_osdc_put_request(lreq->reg_req); 2715 ceph_osdc_put_request(lreq->ping_req); 2716 target_destroy(&lreq->t); 2717 kfree(lreq); 2718 } 2719 2720 static void linger_put(struct ceph_osd_linger_request *lreq) 2721 { 2722 if (lreq) 2723 kref_put(&lreq->kref, linger_release); 2724 } 2725 2726 static struct ceph_osd_linger_request * 2727 linger_get(struct ceph_osd_linger_request *lreq) 2728 { 2729 kref_get(&lreq->kref); 2730 return lreq; 2731 } 2732 2733 static struct ceph_osd_linger_request * 2734 linger_alloc(struct ceph_osd_client *osdc) 2735 { 2736 struct ceph_osd_linger_request *lreq; 2737 2738 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 2739 if (!lreq) 2740 return NULL; 2741 2742 kref_init(&lreq->kref); 2743 mutex_init(&lreq->lock); 2744 RB_CLEAR_NODE(&lreq->node); 2745 RB_CLEAR_NODE(&lreq->osdc_node); 2746 RB_CLEAR_NODE(&lreq->mc_node); 2747 INIT_LIST_HEAD(&lreq->scan_item); 2748 INIT_LIST_HEAD(&lreq->pending_lworks); 2749 init_completion(&lreq->reg_commit_wait); 2750 init_completion(&lreq->notify_finish_wait); 2751 2752 lreq->osdc = osdc; 2753 target_init(&lreq->t); 2754 2755 dout("%s lreq %p\n", __func__, lreq); 2756 return lreq; 2757 } 2758 2759 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 2760 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 2761 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 2762 2763 /* 2764 * Create linger request <-> OSD session relation. 2765 * 2766 * @lreq has to be registered, @osd may be homeless. 2767 */ 2768 static void link_linger(struct ceph_osd *osd, 2769 struct ceph_osd_linger_request *lreq) 2770 { 2771 verify_osd_locked(osd); 2772 WARN_ON(!lreq->linger_id || lreq->osd); 2773 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2774 osd->o_osd, lreq, lreq->linger_id); 2775 2776 if (!osd_homeless(osd)) 2777 __remove_osd_from_lru(osd); 2778 else 2779 atomic_inc(&osd->o_osdc->num_homeless); 2780 2781 get_osd(osd); 2782 insert_linger(&osd->o_linger_requests, lreq); 2783 lreq->osd = osd; 2784 } 2785 2786 static void unlink_linger(struct ceph_osd *osd, 2787 struct ceph_osd_linger_request *lreq) 2788 { 2789 verify_osd_locked(osd); 2790 WARN_ON(lreq->osd != osd); 2791 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2792 osd->o_osd, lreq, lreq->linger_id); 2793 2794 lreq->osd = NULL; 2795 erase_linger(&osd->o_linger_requests, lreq); 2796 put_osd(osd); 2797 2798 if (!osd_homeless(osd)) 2799 maybe_move_osd_to_lru(osd); 2800 else 2801 atomic_dec(&osd->o_osdc->num_homeless); 2802 } 2803 2804 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 2805 { 2806 verify_osdc_locked(lreq->osdc); 2807 2808 return !RB_EMPTY_NODE(&lreq->osdc_node); 2809 } 2810 2811 static bool linger_registered(struct ceph_osd_linger_request *lreq) 2812 { 2813 struct ceph_osd_client *osdc = lreq->osdc; 2814 bool registered; 2815 2816 down_read(&osdc->lock); 2817 registered = __linger_registered(lreq); 2818 up_read(&osdc->lock); 2819 2820 return registered; 2821 } 2822 2823 static void linger_register(struct ceph_osd_linger_request *lreq) 2824 { 2825 struct ceph_osd_client *osdc = lreq->osdc; 2826 2827 verify_osdc_wrlocked(osdc); 2828 WARN_ON(lreq->linger_id); 2829 2830 linger_get(lreq); 2831 lreq->linger_id = ++osdc->last_linger_id; 2832 insert_linger_osdc(&osdc->linger_requests, lreq); 2833 } 2834 2835 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2836 { 2837 struct ceph_osd_client *osdc = lreq->osdc; 2838 2839 verify_osdc_wrlocked(osdc); 2840 2841 erase_linger_osdc(&osdc->linger_requests, lreq); 2842 linger_put(lreq); 2843 } 2844 2845 static void cancel_linger_request(struct ceph_osd_request *req) 2846 { 2847 struct ceph_osd_linger_request *lreq = req->r_priv; 2848 2849 WARN_ON(!req->r_linger); 2850 cancel_request(req); 2851 linger_put(lreq); 2852 } 2853 2854 struct linger_work { 2855 struct work_struct work; 2856 struct ceph_osd_linger_request *lreq; 2857 struct list_head pending_item; 2858 unsigned long queued_stamp; 2859 2860 union { 2861 struct { 2862 u64 notify_id; 2863 u64 notifier_id; 2864 void *payload; /* points into @msg front */ 2865 size_t payload_len; 2866 2867 struct ceph_msg *msg; /* for ceph_msg_put() */ 2868 } notify; 2869 struct { 2870 int err; 2871 } error; 2872 }; 2873 }; 2874 2875 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2876 work_func_t workfn) 2877 { 2878 struct linger_work *lwork; 2879 2880 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2881 if (!lwork) 2882 return NULL; 2883 2884 INIT_WORK(&lwork->work, workfn); 2885 INIT_LIST_HEAD(&lwork->pending_item); 2886 lwork->lreq = linger_get(lreq); 2887 2888 return lwork; 2889 } 2890 2891 static void lwork_free(struct linger_work *lwork) 2892 { 2893 struct ceph_osd_linger_request *lreq = lwork->lreq; 2894 2895 mutex_lock(&lreq->lock); 2896 list_del(&lwork->pending_item); 2897 mutex_unlock(&lreq->lock); 2898 2899 linger_put(lreq); 2900 kfree(lwork); 2901 } 2902 2903 static void lwork_queue(struct linger_work *lwork) 2904 { 2905 struct ceph_osd_linger_request *lreq = lwork->lreq; 2906 struct ceph_osd_client *osdc = lreq->osdc; 2907 2908 verify_lreq_locked(lreq); 2909 WARN_ON(!list_empty(&lwork->pending_item)); 2910 2911 lwork->queued_stamp = jiffies; 2912 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2913 queue_work(osdc->notify_wq, &lwork->work); 2914 } 2915 2916 static void do_watch_notify(struct work_struct *w) 2917 { 2918 struct linger_work *lwork = container_of(w, struct linger_work, work); 2919 struct ceph_osd_linger_request *lreq = lwork->lreq; 2920 2921 if (!linger_registered(lreq)) { 2922 dout("%s lreq %p not registered\n", __func__, lreq); 2923 goto out; 2924 } 2925 2926 WARN_ON(!lreq->is_watch); 2927 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2928 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2929 lwork->notify.payload_len); 2930 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2931 lwork->notify.notifier_id, lwork->notify.payload, 2932 lwork->notify.payload_len); 2933 2934 out: 2935 ceph_msg_put(lwork->notify.msg); 2936 lwork_free(lwork); 2937 } 2938 2939 static void do_watch_error(struct work_struct *w) 2940 { 2941 struct linger_work *lwork = container_of(w, struct linger_work, work); 2942 struct ceph_osd_linger_request *lreq = lwork->lreq; 2943 2944 if (!linger_registered(lreq)) { 2945 dout("%s lreq %p not registered\n", __func__, lreq); 2946 goto out; 2947 } 2948 2949 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2950 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2951 2952 out: 2953 lwork_free(lwork); 2954 } 2955 2956 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2957 { 2958 struct linger_work *lwork; 2959 2960 lwork = lwork_alloc(lreq, do_watch_error); 2961 if (!lwork) { 2962 pr_err("failed to allocate error-lwork\n"); 2963 return; 2964 } 2965 2966 lwork->error.err = lreq->last_error; 2967 lwork_queue(lwork); 2968 } 2969 2970 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2971 int result) 2972 { 2973 if (!completion_done(&lreq->reg_commit_wait)) { 2974 lreq->reg_commit_error = (result <= 0 ? result : 0); 2975 complete_all(&lreq->reg_commit_wait); 2976 } 2977 } 2978 2979 static void linger_commit_cb(struct ceph_osd_request *req) 2980 { 2981 struct ceph_osd_linger_request *lreq = req->r_priv; 2982 2983 mutex_lock(&lreq->lock); 2984 if (req != lreq->reg_req) { 2985 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n", 2986 __func__, lreq, lreq->linger_id, req, lreq->reg_req); 2987 goto out; 2988 } 2989 2990 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2991 lreq->linger_id, req->r_result); 2992 linger_reg_commit_complete(lreq, req->r_result); 2993 lreq->committed = true; 2994 2995 if (!lreq->is_watch) { 2996 struct ceph_osd_data *osd_data = 2997 osd_req_op_data(req, 0, notify, response_data); 2998 void *p = page_address(osd_data->pages[0]); 2999 3000 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 3001 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 3002 3003 /* make note of the notify_id */ 3004 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 3005 lreq->notify_id = ceph_decode_64(&p); 3006 dout("lreq %p notify_id %llu\n", lreq, 3007 lreq->notify_id); 3008 } else { 3009 dout("lreq %p no notify_id\n", lreq); 3010 } 3011 } 3012 3013 out: 3014 mutex_unlock(&lreq->lock); 3015 linger_put(lreq); 3016 } 3017 3018 static int normalize_watch_error(int err) 3019 { 3020 /* 3021 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 3022 * notification and a failure to reconnect because we raced with 3023 * the delete appear the same to the user. 3024 */ 3025 if (err == -ENOENT) 3026 err = -ENOTCONN; 3027 3028 return err; 3029 } 3030 3031 static void linger_reconnect_cb(struct ceph_osd_request *req) 3032 { 3033 struct ceph_osd_linger_request *lreq = req->r_priv; 3034 3035 mutex_lock(&lreq->lock); 3036 if (req != lreq->reg_req) { 3037 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n", 3038 __func__, lreq, lreq->linger_id, req, lreq->reg_req); 3039 goto out; 3040 } 3041 3042 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 3043 lreq, lreq->linger_id, req->r_result, lreq->last_error); 3044 if (req->r_result < 0) { 3045 if (!lreq->last_error) { 3046 lreq->last_error = normalize_watch_error(req->r_result); 3047 queue_watch_error(lreq); 3048 } 3049 } 3050 3051 out: 3052 mutex_unlock(&lreq->lock); 3053 linger_put(lreq); 3054 } 3055 3056 static void send_linger(struct ceph_osd_linger_request *lreq) 3057 { 3058 struct ceph_osd_client *osdc = lreq->osdc; 3059 struct ceph_osd_request *req; 3060 int ret; 3061 3062 verify_osdc_wrlocked(osdc); 3063 mutex_lock(&lreq->lock); 3064 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3065 3066 if (lreq->reg_req) { 3067 if (lreq->reg_req->r_osd) 3068 cancel_linger_request(lreq->reg_req); 3069 ceph_osdc_put_request(lreq->reg_req); 3070 } 3071 3072 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO); 3073 BUG_ON(!req); 3074 3075 target_copy(&req->r_t, &lreq->t); 3076 req->r_mtime = lreq->mtime; 3077 3078 if (lreq->is_watch && lreq->committed) { 3079 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_RECONNECT, 3080 lreq->linger_id, ++lreq->register_gen); 3081 dout("lreq %p reconnect register_gen %u\n", lreq, 3082 req->r_ops[0].watch.gen); 3083 req->r_callback = linger_reconnect_cb; 3084 } else { 3085 if (lreq->is_watch) { 3086 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_WATCH, 3087 lreq->linger_id, 0); 3088 } else { 3089 lreq->notify_id = 0; 3090 3091 refcount_inc(&lreq->request_pl->refcnt); 3092 osd_req_op_notify_init(req, 0, lreq->linger_id, 3093 lreq->request_pl); 3094 ceph_osd_data_pages_init( 3095 osd_req_op_data(req, 0, notify, response_data), 3096 lreq->notify_id_pages, PAGE_SIZE, 0, false, false); 3097 } 3098 dout("lreq %p register\n", lreq); 3099 req->r_callback = linger_commit_cb; 3100 } 3101 3102 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3103 BUG_ON(ret); 3104 3105 req->r_priv = linger_get(lreq); 3106 req->r_linger = true; 3107 lreq->reg_req = req; 3108 mutex_unlock(&lreq->lock); 3109 3110 submit_request(req, true); 3111 } 3112 3113 static void linger_ping_cb(struct ceph_osd_request *req) 3114 { 3115 struct ceph_osd_linger_request *lreq = req->r_priv; 3116 3117 mutex_lock(&lreq->lock); 3118 if (req != lreq->ping_req) { 3119 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n", 3120 __func__, lreq, lreq->linger_id, req, lreq->ping_req); 3121 goto out; 3122 } 3123 3124 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 3125 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 3126 lreq->last_error); 3127 if (lreq->register_gen == req->r_ops[0].watch.gen) { 3128 if (!req->r_result) { 3129 lreq->watch_valid_thru = lreq->ping_sent; 3130 } else if (!lreq->last_error) { 3131 lreq->last_error = normalize_watch_error(req->r_result); 3132 queue_watch_error(lreq); 3133 } 3134 } else { 3135 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 3136 lreq->register_gen, req->r_ops[0].watch.gen); 3137 } 3138 3139 out: 3140 mutex_unlock(&lreq->lock); 3141 linger_put(lreq); 3142 } 3143 3144 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 3145 { 3146 struct ceph_osd_client *osdc = lreq->osdc; 3147 struct ceph_osd_request *req; 3148 int ret; 3149 3150 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 3151 dout("%s PAUSERD\n", __func__); 3152 return; 3153 } 3154 3155 lreq->ping_sent = jiffies; 3156 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 3157 __func__, lreq, lreq->linger_id, lreq->ping_sent, 3158 lreq->register_gen); 3159 3160 if (lreq->ping_req) { 3161 if (lreq->ping_req->r_osd) 3162 cancel_linger_request(lreq->ping_req); 3163 ceph_osdc_put_request(lreq->ping_req); 3164 } 3165 3166 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO); 3167 BUG_ON(!req); 3168 3169 target_copy(&req->r_t, &lreq->t); 3170 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_PING, lreq->linger_id, 3171 lreq->register_gen); 3172 req->r_callback = linger_ping_cb; 3173 3174 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3175 BUG_ON(ret); 3176 3177 req->r_priv = linger_get(lreq); 3178 req->r_linger = true; 3179 lreq->ping_req = req; 3180 3181 ceph_osdc_get_request(req); 3182 account_request(req); 3183 req->r_tid = atomic64_inc_return(&osdc->last_tid); 3184 link_request(lreq->osd, req); 3185 send_request(req); 3186 } 3187 3188 static void linger_submit(struct ceph_osd_linger_request *lreq) 3189 { 3190 struct ceph_osd_client *osdc = lreq->osdc; 3191 struct ceph_osd *osd; 3192 3193 down_write(&osdc->lock); 3194 linger_register(lreq); 3195 3196 calc_target(osdc, &lreq->t, false); 3197 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3198 link_linger(osd, lreq); 3199 3200 send_linger(lreq); 3201 up_write(&osdc->lock); 3202 } 3203 3204 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 3205 { 3206 struct ceph_osd_client *osdc = lreq->osdc; 3207 struct ceph_osd_linger_request *lookup_lreq; 3208 3209 verify_osdc_wrlocked(osdc); 3210 3211 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3212 lreq->linger_id); 3213 if (!lookup_lreq) 3214 return; 3215 3216 WARN_ON(lookup_lreq != lreq); 3217 erase_linger_mc(&osdc->linger_map_checks, lreq); 3218 linger_put(lreq); 3219 } 3220 3221 /* 3222 * @lreq has to be both registered and linked. 3223 */ 3224 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 3225 { 3226 if (lreq->ping_req && lreq->ping_req->r_osd) 3227 cancel_linger_request(lreq->ping_req); 3228 if (lreq->reg_req && lreq->reg_req->r_osd) 3229 cancel_linger_request(lreq->reg_req); 3230 cancel_linger_map_check(lreq); 3231 unlink_linger(lreq->osd, lreq); 3232 linger_unregister(lreq); 3233 } 3234 3235 static void linger_cancel(struct ceph_osd_linger_request *lreq) 3236 { 3237 struct ceph_osd_client *osdc = lreq->osdc; 3238 3239 down_write(&osdc->lock); 3240 if (__linger_registered(lreq)) 3241 __linger_cancel(lreq); 3242 up_write(&osdc->lock); 3243 } 3244 3245 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 3246 3247 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 3248 { 3249 struct ceph_osd_client *osdc = lreq->osdc; 3250 struct ceph_osdmap *map = osdc->osdmap; 3251 3252 verify_osdc_wrlocked(osdc); 3253 WARN_ON(!map->epoch); 3254 3255 if (lreq->register_gen) { 3256 lreq->map_dne_bound = map->epoch; 3257 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 3258 lreq, lreq->linger_id); 3259 } else { 3260 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 3261 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3262 map->epoch); 3263 } 3264 3265 if (lreq->map_dne_bound) { 3266 if (map->epoch >= lreq->map_dne_bound) { 3267 /* we had a new enough map */ 3268 pr_info("linger_id %llu pool does not exist\n", 3269 lreq->linger_id); 3270 linger_reg_commit_complete(lreq, -ENOENT); 3271 __linger_cancel(lreq); 3272 } 3273 } else { 3274 send_linger_map_check(lreq); 3275 } 3276 } 3277 3278 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 3279 { 3280 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 3281 struct ceph_osd_linger_request *lreq; 3282 u64 linger_id = greq->private_data; 3283 3284 WARN_ON(greq->result || !greq->u.newest); 3285 3286 down_write(&osdc->lock); 3287 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 3288 if (!lreq) { 3289 dout("%s linger_id %llu dne\n", __func__, linger_id); 3290 goto out_unlock; 3291 } 3292 3293 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 3294 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3295 greq->u.newest); 3296 if (!lreq->map_dne_bound) 3297 lreq->map_dne_bound = greq->u.newest; 3298 erase_linger_mc(&osdc->linger_map_checks, lreq); 3299 check_linger_pool_dne(lreq); 3300 3301 linger_put(lreq); 3302 out_unlock: 3303 up_write(&osdc->lock); 3304 } 3305 3306 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 3307 { 3308 struct ceph_osd_client *osdc = lreq->osdc; 3309 struct ceph_osd_linger_request *lookup_lreq; 3310 int ret; 3311 3312 verify_osdc_wrlocked(osdc); 3313 3314 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3315 lreq->linger_id); 3316 if (lookup_lreq) { 3317 WARN_ON(lookup_lreq != lreq); 3318 return; 3319 } 3320 3321 linger_get(lreq); 3322 insert_linger_mc(&osdc->linger_map_checks, lreq); 3323 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 3324 linger_map_check_cb, lreq->linger_id); 3325 WARN_ON(ret); 3326 } 3327 3328 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 3329 { 3330 int ret; 3331 3332 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3333 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 3334 return ret ?: lreq->reg_commit_error; 3335 } 3336 3337 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 3338 { 3339 int ret; 3340 3341 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3342 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 3343 return ret ?: lreq->notify_finish_error; 3344 } 3345 3346 /* 3347 * Timeout callback, called every N seconds. When 1 or more OSD 3348 * requests has been active for more than N seconds, we send a keepalive 3349 * (tag + timestamp) to its OSD to ensure any communications channel 3350 * reset is detected. 3351 */ 3352 static void handle_timeout(struct work_struct *work) 3353 { 3354 struct ceph_osd_client *osdc = 3355 container_of(work, struct ceph_osd_client, timeout_work.work); 3356 struct ceph_options *opts = osdc->client->options; 3357 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 3358 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout; 3359 LIST_HEAD(slow_osds); 3360 struct rb_node *n, *p; 3361 3362 dout("%s osdc %p\n", __func__, osdc); 3363 down_write(&osdc->lock); 3364 3365 /* 3366 * ping osds that are a bit slow. this ensures that if there 3367 * is a break in the TCP connection we will notice, and reopen 3368 * a connection with that osd (from the fault callback). 3369 */ 3370 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3371 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3372 bool found = false; 3373 3374 for (p = rb_first(&osd->o_requests); p; ) { 3375 struct ceph_osd_request *req = 3376 rb_entry(p, struct ceph_osd_request, r_node); 3377 3378 p = rb_next(p); /* abort_request() */ 3379 3380 if (time_before(req->r_stamp, cutoff)) { 3381 dout(" req %p tid %llu on osd%d is laggy\n", 3382 req, req->r_tid, osd->o_osd); 3383 found = true; 3384 } 3385 if (opts->osd_request_timeout && 3386 time_before(req->r_start_stamp, expiry_cutoff)) { 3387 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3388 req->r_tid, osd->o_osd); 3389 abort_request(req, -ETIMEDOUT); 3390 } 3391 } 3392 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 3393 struct ceph_osd_linger_request *lreq = 3394 rb_entry(p, struct ceph_osd_linger_request, node); 3395 3396 dout(" lreq %p linger_id %llu is served by osd%d\n", 3397 lreq, lreq->linger_id, osd->o_osd); 3398 found = true; 3399 3400 mutex_lock(&lreq->lock); 3401 if (lreq->is_watch && lreq->committed && !lreq->last_error) 3402 send_linger_ping(lreq); 3403 mutex_unlock(&lreq->lock); 3404 } 3405 3406 if (found) 3407 list_move_tail(&osd->o_keepalive_item, &slow_osds); 3408 } 3409 3410 if (opts->osd_request_timeout) { 3411 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 3412 struct ceph_osd_request *req = 3413 rb_entry(p, struct ceph_osd_request, r_node); 3414 3415 p = rb_next(p); /* abort_request() */ 3416 3417 if (time_before(req->r_start_stamp, expiry_cutoff)) { 3418 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3419 req->r_tid, osdc->homeless_osd.o_osd); 3420 abort_request(req, -ETIMEDOUT); 3421 } 3422 } 3423 } 3424 3425 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 3426 maybe_request_map(osdc); 3427 3428 while (!list_empty(&slow_osds)) { 3429 struct ceph_osd *osd = list_first_entry(&slow_osds, 3430 struct ceph_osd, 3431 o_keepalive_item); 3432 list_del_init(&osd->o_keepalive_item); 3433 ceph_con_keepalive(&osd->o_con); 3434 } 3435 3436 up_write(&osdc->lock); 3437 schedule_delayed_work(&osdc->timeout_work, 3438 osdc->client->options->osd_keepalive_timeout); 3439 } 3440 3441 static void handle_osds_timeout(struct work_struct *work) 3442 { 3443 struct ceph_osd_client *osdc = 3444 container_of(work, struct ceph_osd_client, 3445 osds_timeout_work.work); 3446 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 3447 struct ceph_osd *osd, *nosd; 3448 3449 dout("%s osdc %p\n", __func__, osdc); 3450 down_write(&osdc->lock); 3451 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 3452 if (time_before(jiffies, osd->lru_ttl)) 3453 break; 3454 3455 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 3456 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 3457 close_osd(osd); 3458 } 3459 3460 up_write(&osdc->lock); 3461 schedule_delayed_work(&osdc->osds_timeout_work, 3462 round_jiffies_relative(delay)); 3463 } 3464 3465 static int ceph_oloc_decode(void **p, void *end, 3466 struct ceph_object_locator *oloc) 3467 { 3468 u8 struct_v, struct_cv; 3469 u32 len; 3470 void *struct_end; 3471 int ret = 0; 3472 3473 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3474 struct_v = ceph_decode_8(p); 3475 struct_cv = ceph_decode_8(p); 3476 if (struct_v < 3) { 3477 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 3478 struct_v, struct_cv); 3479 goto e_inval; 3480 } 3481 if (struct_cv > 6) { 3482 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 3483 struct_v, struct_cv); 3484 goto e_inval; 3485 } 3486 len = ceph_decode_32(p); 3487 ceph_decode_need(p, end, len, e_inval); 3488 struct_end = *p + len; 3489 3490 oloc->pool = ceph_decode_64(p); 3491 *p += 4; /* skip preferred */ 3492 3493 len = ceph_decode_32(p); 3494 if (len > 0) { 3495 pr_warn("ceph_object_locator::key is set\n"); 3496 goto e_inval; 3497 } 3498 3499 if (struct_v >= 5) { 3500 bool changed = false; 3501 3502 len = ceph_decode_32(p); 3503 if (len > 0) { 3504 ceph_decode_need(p, end, len, e_inval); 3505 if (!oloc->pool_ns || 3506 ceph_compare_string(oloc->pool_ns, *p, len)) 3507 changed = true; 3508 *p += len; 3509 } else { 3510 if (oloc->pool_ns) 3511 changed = true; 3512 } 3513 if (changed) { 3514 /* redirect changes namespace */ 3515 pr_warn("ceph_object_locator::nspace is changed\n"); 3516 goto e_inval; 3517 } 3518 } 3519 3520 if (struct_v >= 6) { 3521 s64 hash = ceph_decode_64(p); 3522 if (hash != -1) { 3523 pr_warn("ceph_object_locator::hash is set\n"); 3524 goto e_inval; 3525 } 3526 } 3527 3528 /* skip the rest */ 3529 *p = struct_end; 3530 out: 3531 return ret; 3532 3533 e_inval: 3534 ret = -EINVAL; 3535 goto out; 3536 } 3537 3538 static int ceph_redirect_decode(void **p, void *end, 3539 struct ceph_request_redirect *redir) 3540 { 3541 u8 struct_v, struct_cv; 3542 u32 len; 3543 void *struct_end; 3544 int ret; 3545 3546 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3547 struct_v = ceph_decode_8(p); 3548 struct_cv = ceph_decode_8(p); 3549 if (struct_cv > 1) { 3550 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 3551 struct_v, struct_cv); 3552 goto e_inval; 3553 } 3554 len = ceph_decode_32(p); 3555 ceph_decode_need(p, end, len, e_inval); 3556 struct_end = *p + len; 3557 3558 ret = ceph_oloc_decode(p, end, &redir->oloc); 3559 if (ret) 3560 goto out; 3561 3562 len = ceph_decode_32(p); 3563 if (len > 0) { 3564 pr_warn("ceph_request_redirect::object_name is set\n"); 3565 goto e_inval; 3566 } 3567 3568 /* skip the rest */ 3569 *p = struct_end; 3570 out: 3571 return ret; 3572 3573 e_inval: 3574 ret = -EINVAL; 3575 goto out; 3576 } 3577 3578 struct MOSDOpReply { 3579 struct ceph_pg pgid; 3580 u64 flags; 3581 int result; 3582 u32 epoch; 3583 int num_ops; 3584 u32 outdata_len[CEPH_OSD_MAX_OPS]; 3585 s32 rval[CEPH_OSD_MAX_OPS]; 3586 int retry_attempt; 3587 struct ceph_eversion replay_version; 3588 u64 user_version; 3589 struct ceph_request_redirect redirect; 3590 }; 3591 3592 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 3593 { 3594 void *p = msg->front.iov_base; 3595 void *const end = p + msg->front.iov_len; 3596 u16 version = le16_to_cpu(msg->hdr.version); 3597 struct ceph_eversion bad_replay_version; 3598 u8 decode_redir; 3599 u32 len; 3600 int ret; 3601 int i; 3602 3603 ceph_decode_32_safe(&p, end, len, e_inval); 3604 ceph_decode_need(&p, end, len, e_inval); 3605 p += len; /* skip oid */ 3606 3607 ret = ceph_decode_pgid(&p, end, &m->pgid); 3608 if (ret) 3609 return ret; 3610 3611 ceph_decode_64_safe(&p, end, m->flags, e_inval); 3612 ceph_decode_32_safe(&p, end, m->result, e_inval); 3613 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 3614 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 3615 p += sizeof(bad_replay_version); 3616 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 3617 3618 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 3619 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 3620 goto e_inval; 3621 3622 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 3623 e_inval); 3624 for (i = 0; i < m->num_ops; i++) { 3625 struct ceph_osd_op *op = p; 3626 3627 m->outdata_len[i] = le32_to_cpu(op->payload_len); 3628 p += sizeof(*op); 3629 } 3630 3631 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 3632 for (i = 0; i < m->num_ops; i++) 3633 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 3634 3635 if (version >= 5) { 3636 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 3637 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 3638 p += sizeof(m->replay_version); 3639 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 3640 } else { 3641 m->replay_version = bad_replay_version; /* struct */ 3642 m->user_version = le64_to_cpu(m->replay_version.version); 3643 } 3644 3645 if (version >= 6) { 3646 if (version >= 7) 3647 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 3648 else 3649 decode_redir = 1; 3650 } else { 3651 decode_redir = 0; 3652 } 3653 3654 if (decode_redir) { 3655 ret = ceph_redirect_decode(&p, end, &m->redirect); 3656 if (ret) 3657 return ret; 3658 } else { 3659 ceph_oloc_init(&m->redirect.oloc); 3660 } 3661 3662 return 0; 3663 3664 e_inval: 3665 return -EINVAL; 3666 } 3667 3668 /* 3669 * Handle MOSDOpReply. Set ->r_result and call the callback if it is 3670 * specified. 3671 */ 3672 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 3673 { 3674 struct ceph_osd_client *osdc = osd->o_osdc; 3675 struct ceph_osd_request *req; 3676 struct MOSDOpReply m; 3677 u64 tid = le64_to_cpu(msg->hdr.tid); 3678 u32 data_len = 0; 3679 int ret; 3680 int i; 3681 3682 dout("%s msg %p tid %llu\n", __func__, msg, tid); 3683 3684 down_read(&osdc->lock); 3685 if (!osd_registered(osd)) { 3686 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3687 goto out_unlock_osdc; 3688 } 3689 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 3690 3691 mutex_lock(&osd->lock); 3692 req = lookup_request(&osd->o_requests, tid); 3693 if (!req) { 3694 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 3695 goto out_unlock_session; 3696 } 3697 3698 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 3699 ret = decode_MOSDOpReply(msg, &m); 3700 m.redirect.oloc.pool_ns = NULL; 3701 if (ret) { 3702 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 3703 req->r_tid, ret); 3704 ceph_msg_dump(msg); 3705 goto fail_request; 3706 } 3707 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 3708 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 3709 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 3710 le64_to_cpu(m.replay_version.version), m.user_version); 3711 3712 if (m.retry_attempt >= 0) { 3713 if (m.retry_attempt != req->r_attempts - 1) { 3714 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 3715 req, req->r_tid, m.retry_attempt, 3716 req->r_attempts - 1); 3717 goto out_unlock_session; 3718 } 3719 } else { 3720 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 3721 } 3722 3723 if (!ceph_oloc_empty(&m.redirect.oloc)) { 3724 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 3725 m.redirect.oloc.pool); 3726 unlink_request(osd, req); 3727 mutex_unlock(&osd->lock); 3728 3729 /* 3730 * Not ceph_oloc_copy() - changing pool_ns is not 3731 * supported. 3732 */ 3733 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 3734 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED | 3735 CEPH_OSD_FLAG_IGNORE_OVERLAY | 3736 CEPH_OSD_FLAG_IGNORE_CACHE; 3737 req->r_tid = 0; 3738 __submit_request(req, false); 3739 goto out_unlock_osdc; 3740 } 3741 3742 if (m.result == -EAGAIN) { 3743 dout("req %p tid %llu EAGAIN\n", req, req->r_tid); 3744 unlink_request(osd, req); 3745 mutex_unlock(&osd->lock); 3746 3747 /* 3748 * The object is missing on the replica or not (yet) 3749 * readable. Clear pgid to force a resend to the primary 3750 * via legacy_change. 3751 */ 3752 req->r_t.pgid.pool = 0; 3753 req->r_t.pgid.seed = 0; 3754 WARN_ON(!req->r_t.used_replica); 3755 req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS | 3756 CEPH_OSD_FLAG_LOCALIZE_READS); 3757 req->r_tid = 0; 3758 __submit_request(req, false); 3759 goto out_unlock_osdc; 3760 } 3761 3762 if (m.num_ops != req->r_num_ops) { 3763 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 3764 req->r_num_ops, req->r_tid); 3765 goto fail_request; 3766 } 3767 for (i = 0; i < req->r_num_ops; i++) { 3768 dout(" req %p tid %llu op %d rval %d len %u\n", req, 3769 req->r_tid, i, m.rval[i], m.outdata_len[i]); 3770 req->r_ops[i].rval = m.rval[i]; 3771 req->r_ops[i].outdata_len = m.outdata_len[i]; 3772 data_len += m.outdata_len[i]; 3773 } 3774 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 3775 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 3776 le32_to_cpu(msg->hdr.data_len), req->r_tid); 3777 goto fail_request; 3778 } 3779 dout("%s req %p tid %llu result %d data_len %u\n", __func__, 3780 req, req->r_tid, m.result, data_len); 3781 3782 /* 3783 * Since we only ever request ONDISK, we should only ever get 3784 * one (type of) reply back. 3785 */ 3786 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK)); 3787 req->r_result = m.result ?: data_len; 3788 finish_request(req); 3789 mutex_unlock(&osd->lock); 3790 up_read(&osdc->lock); 3791 3792 __complete_request(req); 3793 return; 3794 3795 fail_request: 3796 complete_request(req, -EIO); 3797 out_unlock_session: 3798 mutex_unlock(&osd->lock); 3799 out_unlock_osdc: 3800 up_read(&osdc->lock); 3801 } 3802 3803 static void set_pool_was_full(struct ceph_osd_client *osdc) 3804 { 3805 struct rb_node *n; 3806 3807 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 3808 struct ceph_pg_pool_info *pi = 3809 rb_entry(n, struct ceph_pg_pool_info, node); 3810 3811 pi->was_full = __pool_full(pi); 3812 } 3813 } 3814 3815 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 3816 { 3817 struct ceph_pg_pool_info *pi; 3818 3819 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 3820 if (!pi) 3821 return false; 3822 3823 return pi->was_full && !__pool_full(pi); 3824 } 3825 3826 static enum calc_target_result 3827 recalc_linger_target(struct ceph_osd_linger_request *lreq) 3828 { 3829 struct ceph_osd_client *osdc = lreq->osdc; 3830 enum calc_target_result ct_res; 3831 3832 ct_res = calc_target(osdc, &lreq->t, true); 3833 if (ct_res == CALC_TARGET_NEED_RESEND) { 3834 struct ceph_osd *osd; 3835 3836 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3837 if (osd != lreq->osd) { 3838 unlink_linger(lreq->osd, lreq); 3839 link_linger(osd, lreq); 3840 } 3841 } 3842 3843 return ct_res; 3844 } 3845 3846 /* 3847 * Requeue requests whose mapping to an OSD has changed. 3848 */ 3849 static void scan_requests(struct ceph_osd *osd, 3850 bool force_resend, 3851 bool cleared_full, 3852 bool check_pool_cleared_full, 3853 struct rb_root *need_resend, 3854 struct list_head *need_resend_linger) 3855 { 3856 struct ceph_osd_client *osdc = osd->o_osdc; 3857 struct rb_node *n; 3858 bool force_resend_writes; 3859 3860 for (n = rb_first(&osd->o_linger_requests); n; ) { 3861 struct ceph_osd_linger_request *lreq = 3862 rb_entry(n, struct ceph_osd_linger_request, node); 3863 enum calc_target_result ct_res; 3864 3865 n = rb_next(n); /* recalc_linger_target() */ 3866 3867 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 3868 lreq->linger_id); 3869 ct_res = recalc_linger_target(lreq); 3870 switch (ct_res) { 3871 case CALC_TARGET_NO_ACTION: 3872 force_resend_writes = cleared_full || 3873 (check_pool_cleared_full && 3874 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 3875 if (!force_resend && !force_resend_writes) 3876 break; 3877 3878 fallthrough; 3879 case CALC_TARGET_NEED_RESEND: 3880 cancel_linger_map_check(lreq); 3881 /* 3882 * scan_requests() for the previous epoch(s) 3883 * may have already added it to the list, since 3884 * it's not unlinked here. 3885 */ 3886 if (list_empty(&lreq->scan_item)) 3887 list_add_tail(&lreq->scan_item, need_resend_linger); 3888 break; 3889 case CALC_TARGET_POOL_DNE: 3890 list_del_init(&lreq->scan_item); 3891 check_linger_pool_dne(lreq); 3892 break; 3893 } 3894 } 3895 3896 for (n = rb_first(&osd->o_requests); n; ) { 3897 struct ceph_osd_request *req = 3898 rb_entry(n, struct ceph_osd_request, r_node); 3899 enum calc_target_result ct_res; 3900 3901 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3902 3903 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3904 ct_res = calc_target(osdc, &req->r_t, false); 3905 switch (ct_res) { 3906 case CALC_TARGET_NO_ACTION: 3907 force_resend_writes = cleared_full || 3908 (check_pool_cleared_full && 3909 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3910 if (!force_resend && 3911 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3912 !force_resend_writes)) 3913 break; 3914 3915 fallthrough; 3916 case CALC_TARGET_NEED_RESEND: 3917 cancel_map_check(req); 3918 unlink_request(osd, req); 3919 insert_request(need_resend, req); 3920 break; 3921 case CALC_TARGET_POOL_DNE: 3922 check_pool_dne(req); 3923 break; 3924 } 3925 } 3926 } 3927 3928 static int handle_one_map(struct ceph_osd_client *osdc, 3929 void *p, void *end, bool incremental, 3930 struct rb_root *need_resend, 3931 struct list_head *need_resend_linger) 3932 { 3933 struct ceph_osdmap *newmap; 3934 struct rb_node *n; 3935 bool skipped_map = false; 3936 bool was_full; 3937 3938 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3939 set_pool_was_full(osdc); 3940 3941 if (incremental) 3942 newmap = osdmap_apply_incremental(&p, end, 3943 ceph_msgr2(osdc->client), 3944 osdc->osdmap); 3945 else 3946 newmap = ceph_osdmap_decode(&p, end, ceph_msgr2(osdc->client)); 3947 if (IS_ERR(newmap)) 3948 return PTR_ERR(newmap); 3949 3950 if (newmap != osdc->osdmap) { 3951 /* 3952 * Preserve ->was_full before destroying the old map. 3953 * For pools that weren't in the old map, ->was_full 3954 * should be false. 3955 */ 3956 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3957 struct ceph_pg_pool_info *pi = 3958 rb_entry(n, struct ceph_pg_pool_info, node); 3959 struct ceph_pg_pool_info *old_pi; 3960 3961 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3962 if (old_pi) 3963 pi->was_full = old_pi->was_full; 3964 else 3965 WARN_ON(pi->was_full); 3966 } 3967 3968 if (osdc->osdmap->epoch && 3969 osdc->osdmap->epoch + 1 < newmap->epoch) { 3970 WARN_ON(incremental); 3971 skipped_map = true; 3972 } 3973 3974 ceph_osdmap_destroy(osdc->osdmap); 3975 osdc->osdmap = newmap; 3976 } 3977 3978 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3979 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3980 need_resend, need_resend_linger); 3981 3982 for (n = rb_first(&osdc->osds); n; ) { 3983 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3984 3985 n = rb_next(n); /* close_osd() */ 3986 3987 scan_requests(osd, skipped_map, was_full, true, need_resend, 3988 need_resend_linger); 3989 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3990 memcmp(&osd->o_con.peer_addr, 3991 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3992 sizeof(struct ceph_entity_addr))) 3993 close_osd(osd); 3994 } 3995 3996 return 0; 3997 } 3998 3999 static void kick_requests(struct ceph_osd_client *osdc, 4000 struct rb_root *need_resend, 4001 struct list_head *need_resend_linger) 4002 { 4003 struct ceph_osd_linger_request *lreq, *nlreq; 4004 enum calc_target_result ct_res; 4005 struct rb_node *n; 4006 4007 /* make sure need_resend targets reflect latest map */ 4008 for (n = rb_first(need_resend); n; ) { 4009 struct ceph_osd_request *req = 4010 rb_entry(n, struct ceph_osd_request, r_node); 4011 4012 n = rb_next(n); 4013 4014 if (req->r_t.epoch < osdc->osdmap->epoch) { 4015 ct_res = calc_target(osdc, &req->r_t, false); 4016 if (ct_res == CALC_TARGET_POOL_DNE) { 4017 erase_request(need_resend, req); 4018 check_pool_dne(req); 4019 } 4020 } 4021 } 4022 4023 for (n = rb_first(need_resend); n; ) { 4024 struct ceph_osd_request *req = 4025 rb_entry(n, struct ceph_osd_request, r_node); 4026 struct ceph_osd *osd; 4027 4028 n = rb_next(n); 4029 erase_request(need_resend, req); /* before link_request() */ 4030 4031 osd = lookup_create_osd(osdc, req->r_t.osd, true); 4032 link_request(osd, req); 4033 if (!req->r_linger) { 4034 if (!osd_homeless(osd) && !req->r_t.paused) 4035 send_request(req); 4036 } else { 4037 cancel_linger_request(req); 4038 } 4039 } 4040 4041 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 4042 if (!osd_homeless(lreq->osd)) 4043 send_linger(lreq); 4044 4045 list_del_init(&lreq->scan_item); 4046 } 4047 } 4048 4049 /* 4050 * Process updated osd map. 4051 * 4052 * The message contains any number of incremental and full maps, normally 4053 * indicating some sort of topology change in the cluster. Kick requests 4054 * off to different OSDs as needed. 4055 */ 4056 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 4057 { 4058 void *p = msg->front.iov_base; 4059 void *const end = p + msg->front.iov_len; 4060 u32 nr_maps, maplen; 4061 u32 epoch; 4062 struct ceph_fsid fsid; 4063 struct rb_root need_resend = RB_ROOT; 4064 LIST_HEAD(need_resend_linger); 4065 bool handled_incremental = false; 4066 bool was_pauserd, was_pausewr; 4067 bool pauserd, pausewr; 4068 int err; 4069 4070 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 4071 down_write(&osdc->lock); 4072 4073 /* verify fsid */ 4074 ceph_decode_need(&p, end, sizeof(fsid), bad); 4075 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 4076 if (ceph_check_fsid(osdc->client, &fsid) < 0) 4077 goto bad; 4078 4079 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 4080 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 4081 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 4082 have_pool_full(osdc); 4083 4084 /* incremental maps */ 4085 ceph_decode_32_safe(&p, end, nr_maps, bad); 4086 dout(" %d inc maps\n", nr_maps); 4087 while (nr_maps > 0) { 4088 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 4089 epoch = ceph_decode_32(&p); 4090 maplen = ceph_decode_32(&p); 4091 ceph_decode_need(&p, end, maplen, bad); 4092 if (osdc->osdmap->epoch && 4093 osdc->osdmap->epoch + 1 == epoch) { 4094 dout("applying incremental map %u len %d\n", 4095 epoch, maplen); 4096 err = handle_one_map(osdc, p, p + maplen, true, 4097 &need_resend, &need_resend_linger); 4098 if (err) 4099 goto bad; 4100 handled_incremental = true; 4101 } else { 4102 dout("ignoring incremental map %u len %d\n", 4103 epoch, maplen); 4104 } 4105 p += maplen; 4106 nr_maps--; 4107 } 4108 if (handled_incremental) 4109 goto done; 4110 4111 /* full maps */ 4112 ceph_decode_32_safe(&p, end, nr_maps, bad); 4113 dout(" %d full maps\n", nr_maps); 4114 while (nr_maps) { 4115 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 4116 epoch = ceph_decode_32(&p); 4117 maplen = ceph_decode_32(&p); 4118 ceph_decode_need(&p, end, maplen, bad); 4119 if (nr_maps > 1) { 4120 dout("skipping non-latest full map %u len %d\n", 4121 epoch, maplen); 4122 } else if (osdc->osdmap->epoch >= epoch) { 4123 dout("skipping full map %u len %d, " 4124 "older than our %u\n", epoch, maplen, 4125 osdc->osdmap->epoch); 4126 } else { 4127 dout("taking full map %u len %d\n", epoch, maplen); 4128 err = handle_one_map(osdc, p, p + maplen, false, 4129 &need_resend, &need_resend_linger); 4130 if (err) 4131 goto bad; 4132 } 4133 p += maplen; 4134 nr_maps--; 4135 } 4136 4137 done: 4138 /* 4139 * subscribe to subsequent osdmap updates if full to ensure 4140 * we find out when we are no longer full and stop returning 4141 * ENOSPC. 4142 */ 4143 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 4144 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 4145 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 4146 have_pool_full(osdc); 4147 if (was_pauserd || was_pausewr || pauserd || pausewr || 4148 osdc->osdmap->epoch < osdc->epoch_barrier) 4149 maybe_request_map(osdc); 4150 4151 kick_requests(osdc, &need_resend, &need_resend_linger); 4152 4153 ceph_osdc_abort_on_full(osdc); 4154 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 4155 osdc->osdmap->epoch); 4156 up_write(&osdc->lock); 4157 wake_up_all(&osdc->client->auth_wq); 4158 return; 4159 4160 bad: 4161 pr_err("osdc handle_map corrupt msg\n"); 4162 ceph_msg_dump(msg); 4163 up_write(&osdc->lock); 4164 } 4165 4166 /* 4167 * Resubmit requests pending on the given osd. 4168 */ 4169 static void kick_osd_requests(struct ceph_osd *osd) 4170 { 4171 struct rb_node *n; 4172 4173 clear_backoffs(osd); 4174 4175 for (n = rb_first(&osd->o_requests); n; ) { 4176 struct ceph_osd_request *req = 4177 rb_entry(n, struct ceph_osd_request, r_node); 4178 4179 n = rb_next(n); /* cancel_linger_request() */ 4180 4181 if (!req->r_linger) { 4182 if (!req->r_t.paused) 4183 send_request(req); 4184 } else { 4185 cancel_linger_request(req); 4186 } 4187 } 4188 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 4189 struct ceph_osd_linger_request *lreq = 4190 rb_entry(n, struct ceph_osd_linger_request, node); 4191 4192 send_linger(lreq); 4193 } 4194 } 4195 4196 /* 4197 * If the osd connection drops, we need to resubmit all requests. 4198 */ 4199 static void osd_fault(struct ceph_connection *con) 4200 { 4201 struct ceph_osd *osd = con->private; 4202 struct ceph_osd_client *osdc = osd->o_osdc; 4203 4204 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 4205 4206 down_write(&osdc->lock); 4207 if (!osd_registered(osd)) { 4208 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4209 goto out_unlock; 4210 } 4211 4212 if (!reopen_osd(osd)) 4213 kick_osd_requests(osd); 4214 maybe_request_map(osdc); 4215 4216 out_unlock: 4217 up_write(&osdc->lock); 4218 } 4219 4220 struct MOSDBackoff { 4221 struct ceph_spg spgid; 4222 u32 map_epoch; 4223 u8 op; 4224 u64 id; 4225 struct ceph_hobject_id *begin; 4226 struct ceph_hobject_id *end; 4227 }; 4228 4229 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m) 4230 { 4231 void *p = msg->front.iov_base; 4232 void *const end = p + msg->front.iov_len; 4233 u8 struct_v; 4234 u32 struct_len; 4235 int ret; 4236 4237 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len); 4238 if (ret) 4239 return ret; 4240 4241 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid); 4242 if (ret) 4243 return ret; 4244 4245 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval); 4246 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval); 4247 ceph_decode_8_safe(&p, end, m->op, e_inval); 4248 ceph_decode_64_safe(&p, end, m->id, e_inval); 4249 4250 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO); 4251 if (!m->begin) 4252 return -ENOMEM; 4253 4254 ret = decode_hoid(&p, end, m->begin); 4255 if (ret) { 4256 free_hoid(m->begin); 4257 return ret; 4258 } 4259 4260 m->end = kzalloc(sizeof(*m->end), GFP_NOIO); 4261 if (!m->end) { 4262 free_hoid(m->begin); 4263 return -ENOMEM; 4264 } 4265 4266 ret = decode_hoid(&p, end, m->end); 4267 if (ret) { 4268 free_hoid(m->begin); 4269 free_hoid(m->end); 4270 return ret; 4271 } 4272 4273 return 0; 4274 4275 e_inval: 4276 return -EINVAL; 4277 } 4278 4279 static struct ceph_msg *create_backoff_message( 4280 const struct ceph_osd_backoff *backoff, 4281 u32 map_epoch) 4282 { 4283 struct ceph_msg *msg; 4284 void *p, *end; 4285 int msg_size; 4286 4287 msg_size = CEPH_ENCODING_START_BLK_LEN + 4288 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 4289 msg_size += 4 + 1 + 8; /* map_epoch, op, id */ 4290 msg_size += CEPH_ENCODING_START_BLK_LEN + 4291 hoid_encoding_size(backoff->begin); 4292 msg_size += CEPH_ENCODING_START_BLK_LEN + 4293 hoid_encoding_size(backoff->end); 4294 4295 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true); 4296 if (!msg) 4297 return NULL; 4298 4299 p = msg->front.iov_base; 4300 end = p + msg->front_alloc_len; 4301 4302 encode_spgid(&p, &backoff->spgid); 4303 ceph_encode_32(&p, map_epoch); 4304 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK); 4305 ceph_encode_64(&p, backoff->id); 4306 encode_hoid(&p, end, backoff->begin); 4307 encode_hoid(&p, end, backoff->end); 4308 BUG_ON(p != end); 4309 4310 msg->front.iov_len = p - msg->front.iov_base; 4311 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */ 4312 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 4313 4314 return msg; 4315 } 4316 4317 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m) 4318 { 4319 struct ceph_spg_mapping *spg; 4320 struct ceph_osd_backoff *backoff; 4321 struct ceph_msg *msg; 4322 4323 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4324 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4325 4326 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid); 4327 if (!spg) { 4328 spg = alloc_spg_mapping(); 4329 if (!spg) { 4330 pr_err("%s failed to allocate spg\n", __func__); 4331 return; 4332 } 4333 spg->spgid = m->spgid; /* struct */ 4334 insert_spg_mapping(&osd->o_backoff_mappings, spg); 4335 } 4336 4337 backoff = alloc_backoff(); 4338 if (!backoff) { 4339 pr_err("%s failed to allocate backoff\n", __func__); 4340 return; 4341 } 4342 backoff->spgid = m->spgid; /* struct */ 4343 backoff->id = m->id; 4344 backoff->begin = m->begin; 4345 m->begin = NULL; /* backoff now owns this */ 4346 backoff->end = m->end; 4347 m->end = NULL; /* ditto */ 4348 4349 insert_backoff(&spg->backoffs, backoff); 4350 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4351 4352 /* 4353 * Ack with original backoff's epoch so that the OSD can 4354 * discard this if there was a PG split. 4355 */ 4356 msg = create_backoff_message(backoff, m->map_epoch); 4357 if (!msg) { 4358 pr_err("%s failed to allocate msg\n", __func__); 4359 return; 4360 } 4361 ceph_con_send(&osd->o_con, msg); 4362 } 4363 4364 static bool target_contained_by(const struct ceph_osd_request_target *t, 4365 const struct ceph_hobject_id *begin, 4366 const struct ceph_hobject_id *end) 4367 { 4368 struct ceph_hobject_id hoid; 4369 int cmp; 4370 4371 hoid_fill_from_target(&hoid, t); 4372 cmp = hoid_compare(&hoid, begin); 4373 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0); 4374 } 4375 4376 static void handle_backoff_unblock(struct ceph_osd *osd, 4377 const struct MOSDBackoff *m) 4378 { 4379 struct ceph_spg_mapping *spg; 4380 struct ceph_osd_backoff *backoff; 4381 struct rb_node *n; 4382 4383 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4384 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4385 4386 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id); 4387 if (!backoff) { 4388 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n", 4389 __func__, osd->o_osd, m->spgid.pgid.pool, 4390 m->spgid.pgid.seed, m->spgid.shard, m->id); 4391 return; 4392 } 4393 4394 if (hoid_compare(backoff->begin, m->begin) && 4395 hoid_compare(backoff->end, m->end)) { 4396 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n", 4397 __func__, osd->o_osd, m->spgid.pgid.pool, 4398 m->spgid.pgid.seed, m->spgid.shard, m->id); 4399 /* unblock it anyway... */ 4400 } 4401 4402 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid); 4403 BUG_ON(!spg); 4404 4405 erase_backoff(&spg->backoffs, backoff); 4406 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4407 free_backoff(backoff); 4408 4409 if (RB_EMPTY_ROOT(&spg->backoffs)) { 4410 erase_spg_mapping(&osd->o_backoff_mappings, spg); 4411 free_spg_mapping(spg); 4412 } 4413 4414 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 4415 struct ceph_osd_request *req = 4416 rb_entry(n, struct ceph_osd_request, r_node); 4417 4418 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) { 4419 /* 4420 * Match against @m, not @backoff -- the PG may 4421 * have split on the OSD. 4422 */ 4423 if (target_contained_by(&req->r_t, m->begin, m->end)) { 4424 /* 4425 * If no other installed backoff applies, 4426 * resend. 4427 */ 4428 send_request(req); 4429 } 4430 } 4431 } 4432 } 4433 4434 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg) 4435 { 4436 struct ceph_osd_client *osdc = osd->o_osdc; 4437 struct MOSDBackoff m; 4438 int ret; 4439 4440 down_read(&osdc->lock); 4441 if (!osd_registered(osd)) { 4442 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4443 up_read(&osdc->lock); 4444 return; 4445 } 4446 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 4447 4448 mutex_lock(&osd->lock); 4449 ret = decode_MOSDBackoff(msg, &m); 4450 if (ret) { 4451 pr_err("failed to decode MOSDBackoff: %d\n", ret); 4452 ceph_msg_dump(msg); 4453 goto out_unlock; 4454 } 4455 4456 switch (m.op) { 4457 case CEPH_OSD_BACKOFF_OP_BLOCK: 4458 handle_backoff_block(osd, &m); 4459 break; 4460 case CEPH_OSD_BACKOFF_OP_UNBLOCK: 4461 handle_backoff_unblock(osd, &m); 4462 break; 4463 default: 4464 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op); 4465 } 4466 4467 free_hoid(m.begin); 4468 free_hoid(m.end); 4469 4470 out_unlock: 4471 mutex_unlock(&osd->lock); 4472 up_read(&osdc->lock); 4473 } 4474 4475 /* 4476 * Process osd watch notifications 4477 */ 4478 static void handle_watch_notify(struct ceph_osd_client *osdc, 4479 struct ceph_msg *msg) 4480 { 4481 void *p = msg->front.iov_base; 4482 void *const end = p + msg->front.iov_len; 4483 struct ceph_osd_linger_request *lreq; 4484 struct linger_work *lwork; 4485 u8 proto_ver, opcode; 4486 u64 cookie, notify_id; 4487 u64 notifier_id = 0; 4488 s32 return_code = 0; 4489 void *payload = NULL; 4490 u32 payload_len = 0; 4491 4492 ceph_decode_8_safe(&p, end, proto_ver, bad); 4493 ceph_decode_8_safe(&p, end, opcode, bad); 4494 ceph_decode_64_safe(&p, end, cookie, bad); 4495 p += 8; /* skip ver */ 4496 ceph_decode_64_safe(&p, end, notify_id, bad); 4497 4498 if (proto_ver >= 1) { 4499 ceph_decode_32_safe(&p, end, payload_len, bad); 4500 ceph_decode_need(&p, end, payload_len, bad); 4501 payload = p; 4502 p += payload_len; 4503 } 4504 4505 if (le16_to_cpu(msg->hdr.version) >= 2) 4506 ceph_decode_32_safe(&p, end, return_code, bad); 4507 4508 if (le16_to_cpu(msg->hdr.version) >= 3) 4509 ceph_decode_64_safe(&p, end, notifier_id, bad); 4510 4511 down_read(&osdc->lock); 4512 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 4513 if (!lreq) { 4514 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 4515 cookie); 4516 goto out_unlock_osdc; 4517 } 4518 4519 mutex_lock(&lreq->lock); 4520 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 4521 opcode, cookie, lreq, lreq->is_watch); 4522 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 4523 if (!lreq->last_error) { 4524 lreq->last_error = -ENOTCONN; 4525 queue_watch_error(lreq); 4526 } 4527 } else if (!lreq->is_watch) { 4528 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 4529 if (lreq->notify_id && lreq->notify_id != notify_id) { 4530 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 4531 lreq->notify_id, notify_id); 4532 } else if (!completion_done(&lreq->notify_finish_wait)) { 4533 struct ceph_msg_data *data = 4534 msg->num_data_items ? &msg->data[0] : NULL; 4535 4536 if (data) { 4537 if (lreq->preply_pages) { 4538 WARN_ON(data->type != 4539 CEPH_MSG_DATA_PAGES); 4540 *lreq->preply_pages = data->pages; 4541 *lreq->preply_len = data->length; 4542 data->own_pages = false; 4543 } 4544 } 4545 lreq->notify_finish_error = return_code; 4546 complete_all(&lreq->notify_finish_wait); 4547 } 4548 } else { 4549 /* CEPH_WATCH_EVENT_NOTIFY */ 4550 lwork = lwork_alloc(lreq, do_watch_notify); 4551 if (!lwork) { 4552 pr_err("failed to allocate notify-lwork\n"); 4553 goto out_unlock_lreq; 4554 } 4555 4556 lwork->notify.notify_id = notify_id; 4557 lwork->notify.notifier_id = notifier_id; 4558 lwork->notify.payload = payload; 4559 lwork->notify.payload_len = payload_len; 4560 lwork->notify.msg = ceph_msg_get(msg); 4561 lwork_queue(lwork); 4562 } 4563 4564 out_unlock_lreq: 4565 mutex_unlock(&lreq->lock); 4566 out_unlock_osdc: 4567 up_read(&osdc->lock); 4568 return; 4569 4570 bad: 4571 pr_err("osdc handle_watch_notify corrupt msg\n"); 4572 } 4573 4574 /* 4575 * Register request, send initial attempt. 4576 */ 4577 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 4578 struct ceph_osd_request *req, 4579 bool nofail) 4580 { 4581 down_read(&osdc->lock); 4582 submit_request(req, false); 4583 up_read(&osdc->lock); 4584 4585 return 0; 4586 } 4587 EXPORT_SYMBOL(ceph_osdc_start_request); 4588 4589 /* 4590 * Unregister a registered request. The request is not completed: 4591 * ->r_result isn't set and __complete_request() isn't called. 4592 */ 4593 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 4594 { 4595 struct ceph_osd_client *osdc = req->r_osdc; 4596 4597 down_write(&osdc->lock); 4598 if (req->r_osd) 4599 cancel_request(req); 4600 up_write(&osdc->lock); 4601 } 4602 EXPORT_SYMBOL(ceph_osdc_cancel_request); 4603 4604 /* 4605 * @timeout: in jiffies, 0 means "wait forever" 4606 */ 4607 static int wait_request_timeout(struct ceph_osd_request *req, 4608 unsigned long timeout) 4609 { 4610 long left; 4611 4612 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 4613 left = wait_for_completion_killable_timeout(&req->r_completion, 4614 ceph_timeout_jiffies(timeout)); 4615 if (left <= 0) { 4616 left = left ?: -ETIMEDOUT; 4617 ceph_osdc_cancel_request(req); 4618 } else { 4619 left = req->r_result; /* completed */ 4620 } 4621 4622 return left; 4623 } 4624 4625 /* 4626 * wait for a request to complete 4627 */ 4628 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 4629 struct ceph_osd_request *req) 4630 { 4631 return wait_request_timeout(req, 0); 4632 } 4633 EXPORT_SYMBOL(ceph_osdc_wait_request); 4634 4635 /* 4636 * sync - wait for all in-flight requests to flush. avoid starvation. 4637 */ 4638 void ceph_osdc_sync(struct ceph_osd_client *osdc) 4639 { 4640 struct rb_node *n, *p; 4641 u64 last_tid = atomic64_read(&osdc->last_tid); 4642 4643 again: 4644 down_read(&osdc->lock); 4645 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 4646 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 4647 4648 mutex_lock(&osd->lock); 4649 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 4650 struct ceph_osd_request *req = 4651 rb_entry(p, struct ceph_osd_request, r_node); 4652 4653 if (req->r_tid > last_tid) 4654 break; 4655 4656 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 4657 continue; 4658 4659 ceph_osdc_get_request(req); 4660 mutex_unlock(&osd->lock); 4661 up_read(&osdc->lock); 4662 dout("%s waiting on req %p tid %llu last_tid %llu\n", 4663 __func__, req, req->r_tid, last_tid); 4664 wait_for_completion(&req->r_completion); 4665 ceph_osdc_put_request(req); 4666 goto again; 4667 } 4668 4669 mutex_unlock(&osd->lock); 4670 } 4671 4672 up_read(&osdc->lock); 4673 dout("%s done last_tid %llu\n", __func__, last_tid); 4674 } 4675 EXPORT_SYMBOL(ceph_osdc_sync); 4676 4677 /* 4678 * Returns a handle, caller owns a ref. 4679 */ 4680 struct ceph_osd_linger_request * 4681 ceph_osdc_watch(struct ceph_osd_client *osdc, 4682 struct ceph_object_id *oid, 4683 struct ceph_object_locator *oloc, 4684 rados_watchcb2_t wcb, 4685 rados_watcherrcb_t errcb, 4686 void *data) 4687 { 4688 struct ceph_osd_linger_request *lreq; 4689 int ret; 4690 4691 lreq = linger_alloc(osdc); 4692 if (!lreq) 4693 return ERR_PTR(-ENOMEM); 4694 4695 lreq->is_watch = true; 4696 lreq->wcb = wcb; 4697 lreq->errcb = errcb; 4698 lreq->data = data; 4699 lreq->watch_valid_thru = jiffies; 4700 4701 ceph_oid_copy(&lreq->t.base_oid, oid); 4702 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4703 lreq->t.flags = CEPH_OSD_FLAG_WRITE; 4704 ktime_get_real_ts64(&lreq->mtime); 4705 4706 linger_submit(lreq); 4707 ret = linger_reg_commit_wait(lreq); 4708 if (ret) { 4709 linger_cancel(lreq); 4710 goto err_put_lreq; 4711 } 4712 4713 return lreq; 4714 4715 err_put_lreq: 4716 linger_put(lreq); 4717 return ERR_PTR(ret); 4718 } 4719 EXPORT_SYMBOL(ceph_osdc_watch); 4720 4721 /* 4722 * Releases a ref. 4723 * 4724 * Times out after mount_timeout to preserve rbd unmap behaviour 4725 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 4726 * with mount_timeout"). 4727 */ 4728 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 4729 struct ceph_osd_linger_request *lreq) 4730 { 4731 struct ceph_options *opts = osdc->client->options; 4732 struct ceph_osd_request *req; 4733 int ret; 4734 4735 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4736 if (!req) 4737 return -ENOMEM; 4738 4739 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4740 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4741 req->r_flags = CEPH_OSD_FLAG_WRITE; 4742 ktime_get_real_ts64(&req->r_mtime); 4743 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_UNWATCH, 4744 lreq->linger_id, 0); 4745 4746 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4747 if (ret) 4748 goto out_put_req; 4749 4750 ceph_osdc_start_request(osdc, req, false); 4751 linger_cancel(lreq); 4752 linger_put(lreq); 4753 ret = wait_request_timeout(req, opts->mount_timeout); 4754 4755 out_put_req: 4756 ceph_osdc_put_request(req); 4757 return ret; 4758 } 4759 EXPORT_SYMBOL(ceph_osdc_unwatch); 4760 4761 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 4762 u64 notify_id, u64 cookie, void *payload, 4763 u32 payload_len) 4764 { 4765 struct ceph_osd_req_op *op; 4766 struct ceph_pagelist *pl; 4767 int ret; 4768 4769 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 4770 4771 pl = ceph_pagelist_alloc(GFP_NOIO); 4772 if (!pl) 4773 return -ENOMEM; 4774 4775 ret = ceph_pagelist_encode_64(pl, notify_id); 4776 ret |= ceph_pagelist_encode_64(pl, cookie); 4777 if (payload) { 4778 ret |= ceph_pagelist_encode_32(pl, payload_len); 4779 ret |= ceph_pagelist_append(pl, payload, payload_len); 4780 } else { 4781 ret |= ceph_pagelist_encode_32(pl, 0); 4782 } 4783 if (ret) { 4784 ceph_pagelist_release(pl); 4785 return -ENOMEM; 4786 } 4787 4788 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 4789 op->indata_len = pl->length; 4790 return 0; 4791 } 4792 4793 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 4794 struct ceph_object_id *oid, 4795 struct ceph_object_locator *oloc, 4796 u64 notify_id, 4797 u64 cookie, 4798 void *payload, 4799 u32 payload_len) 4800 { 4801 struct ceph_osd_request *req; 4802 int ret; 4803 4804 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4805 if (!req) 4806 return -ENOMEM; 4807 4808 ceph_oid_copy(&req->r_base_oid, oid); 4809 ceph_oloc_copy(&req->r_base_oloc, oloc); 4810 req->r_flags = CEPH_OSD_FLAG_READ; 4811 4812 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 4813 payload_len); 4814 if (ret) 4815 goto out_put_req; 4816 4817 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4818 if (ret) 4819 goto out_put_req; 4820 4821 ceph_osdc_start_request(osdc, req, false); 4822 ret = ceph_osdc_wait_request(osdc, req); 4823 4824 out_put_req: 4825 ceph_osdc_put_request(req); 4826 return ret; 4827 } 4828 EXPORT_SYMBOL(ceph_osdc_notify_ack); 4829 4830 /* 4831 * @timeout: in seconds 4832 * 4833 * @preply_{pages,len} are initialized both on success and error. 4834 * The caller is responsible for: 4835 * 4836 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 4837 */ 4838 int ceph_osdc_notify(struct ceph_osd_client *osdc, 4839 struct ceph_object_id *oid, 4840 struct ceph_object_locator *oloc, 4841 void *payload, 4842 u32 payload_len, 4843 u32 timeout, 4844 struct page ***preply_pages, 4845 size_t *preply_len) 4846 { 4847 struct ceph_osd_linger_request *lreq; 4848 int ret; 4849 4850 WARN_ON(!timeout); 4851 if (preply_pages) { 4852 *preply_pages = NULL; 4853 *preply_len = 0; 4854 } 4855 4856 lreq = linger_alloc(osdc); 4857 if (!lreq) 4858 return -ENOMEM; 4859 4860 lreq->request_pl = ceph_pagelist_alloc(GFP_NOIO); 4861 if (!lreq->request_pl) { 4862 ret = -ENOMEM; 4863 goto out_put_lreq; 4864 } 4865 4866 ret = ceph_pagelist_encode_32(lreq->request_pl, 1); /* prot_ver */ 4867 ret |= ceph_pagelist_encode_32(lreq->request_pl, timeout); 4868 ret |= ceph_pagelist_encode_32(lreq->request_pl, payload_len); 4869 ret |= ceph_pagelist_append(lreq->request_pl, payload, payload_len); 4870 if (ret) { 4871 ret = -ENOMEM; 4872 goto out_put_lreq; 4873 } 4874 4875 /* for notify_id */ 4876 lreq->notify_id_pages = ceph_alloc_page_vector(1, GFP_NOIO); 4877 if (IS_ERR(lreq->notify_id_pages)) { 4878 ret = PTR_ERR(lreq->notify_id_pages); 4879 lreq->notify_id_pages = NULL; 4880 goto out_put_lreq; 4881 } 4882 4883 lreq->preply_pages = preply_pages; 4884 lreq->preply_len = preply_len; 4885 4886 ceph_oid_copy(&lreq->t.base_oid, oid); 4887 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4888 lreq->t.flags = CEPH_OSD_FLAG_READ; 4889 4890 linger_submit(lreq); 4891 ret = linger_reg_commit_wait(lreq); 4892 if (!ret) 4893 ret = linger_notify_finish_wait(lreq); 4894 else 4895 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 4896 4897 linger_cancel(lreq); 4898 out_put_lreq: 4899 linger_put(lreq); 4900 return ret; 4901 } 4902 EXPORT_SYMBOL(ceph_osdc_notify); 4903 4904 /* 4905 * Return the number of milliseconds since the watch was last 4906 * confirmed, or an error. If there is an error, the watch is no 4907 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 4908 */ 4909 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 4910 struct ceph_osd_linger_request *lreq) 4911 { 4912 unsigned long stamp, age; 4913 int ret; 4914 4915 down_read(&osdc->lock); 4916 mutex_lock(&lreq->lock); 4917 stamp = lreq->watch_valid_thru; 4918 if (!list_empty(&lreq->pending_lworks)) { 4919 struct linger_work *lwork = 4920 list_first_entry(&lreq->pending_lworks, 4921 struct linger_work, 4922 pending_item); 4923 4924 if (time_before(lwork->queued_stamp, stamp)) 4925 stamp = lwork->queued_stamp; 4926 } 4927 age = jiffies - stamp; 4928 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 4929 lreq, lreq->linger_id, age, lreq->last_error); 4930 /* we are truncating to msecs, so return a safe upper bound */ 4931 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 4932 4933 mutex_unlock(&lreq->lock); 4934 up_read(&osdc->lock); 4935 return ret; 4936 } 4937 4938 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 4939 { 4940 u8 struct_v; 4941 u32 struct_len; 4942 int ret; 4943 4944 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 4945 &struct_v, &struct_len); 4946 if (ret) 4947 goto bad; 4948 4949 ret = -EINVAL; 4950 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad); 4951 ceph_decode_64_safe(p, end, item->cookie, bad); 4952 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */ 4953 4954 if (struct_v >= 2) { 4955 ret = ceph_decode_entity_addr(p, end, &item->addr); 4956 if (ret) 4957 goto bad; 4958 } else { 4959 ret = 0; 4960 } 4961 4962 dout("%s %s%llu cookie %llu addr %s\n", __func__, 4963 ENTITY_NAME(item->name), item->cookie, 4964 ceph_pr_addr(&item->addr)); 4965 bad: 4966 return ret; 4967 } 4968 4969 static int decode_watchers(void **p, void *end, 4970 struct ceph_watch_item **watchers, 4971 u32 *num_watchers) 4972 { 4973 u8 struct_v; 4974 u32 struct_len; 4975 int i; 4976 int ret; 4977 4978 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 4979 &struct_v, &struct_len); 4980 if (ret) 4981 return ret; 4982 4983 *num_watchers = ceph_decode_32(p); 4984 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 4985 if (!*watchers) 4986 return -ENOMEM; 4987 4988 for (i = 0; i < *num_watchers; i++) { 4989 ret = decode_watcher(p, end, *watchers + i); 4990 if (ret) { 4991 kfree(*watchers); 4992 return ret; 4993 } 4994 } 4995 4996 return 0; 4997 } 4998 4999 /* 5000 * On success, the caller is responsible for: 5001 * 5002 * kfree(watchers); 5003 */ 5004 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 5005 struct ceph_object_id *oid, 5006 struct ceph_object_locator *oloc, 5007 struct ceph_watch_item **watchers, 5008 u32 *num_watchers) 5009 { 5010 struct ceph_osd_request *req; 5011 struct page **pages; 5012 int ret; 5013 5014 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 5015 if (!req) 5016 return -ENOMEM; 5017 5018 ceph_oid_copy(&req->r_base_oid, oid); 5019 ceph_oloc_copy(&req->r_base_oloc, oloc); 5020 req->r_flags = CEPH_OSD_FLAG_READ; 5021 5022 pages = ceph_alloc_page_vector(1, GFP_NOIO); 5023 if (IS_ERR(pages)) { 5024 ret = PTR_ERR(pages); 5025 goto out_put_req; 5026 } 5027 5028 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 5029 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 5030 response_data), 5031 pages, PAGE_SIZE, 0, false, true); 5032 5033 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 5034 if (ret) 5035 goto out_put_req; 5036 5037 ceph_osdc_start_request(osdc, req, false); 5038 ret = ceph_osdc_wait_request(osdc, req); 5039 if (ret >= 0) { 5040 void *p = page_address(pages[0]); 5041 void *const end = p + req->r_ops[0].outdata_len; 5042 5043 ret = decode_watchers(&p, end, watchers, num_watchers); 5044 } 5045 5046 out_put_req: 5047 ceph_osdc_put_request(req); 5048 return ret; 5049 } 5050 EXPORT_SYMBOL(ceph_osdc_list_watchers); 5051 5052 /* 5053 * Call all pending notify callbacks - for use after a watch is 5054 * unregistered, to make sure no more callbacks for it will be invoked 5055 */ 5056 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 5057 { 5058 dout("%s osdc %p\n", __func__, osdc); 5059 flush_workqueue(osdc->notify_wq); 5060 } 5061 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 5062 5063 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 5064 { 5065 down_read(&osdc->lock); 5066 maybe_request_map(osdc); 5067 up_read(&osdc->lock); 5068 } 5069 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 5070 5071 /* 5072 * Execute an OSD class method on an object. 5073 * 5074 * @flags: CEPH_OSD_FLAG_* 5075 * @resp_len: in/out param for reply length 5076 */ 5077 int ceph_osdc_call(struct ceph_osd_client *osdc, 5078 struct ceph_object_id *oid, 5079 struct ceph_object_locator *oloc, 5080 const char *class, const char *method, 5081 unsigned int flags, 5082 struct page *req_page, size_t req_len, 5083 struct page **resp_pages, size_t *resp_len) 5084 { 5085 struct ceph_osd_request *req; 5086 int ret; 5087 5088 if (req_len > PAGE_SIZE) 5089 return -E2BIG; 5090 5091 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 5092 if (!req) 5093 return -ENOMEM; 5094 5095 ceph_oid_copy(&req->r_base_oid, oid); 5096 ceph_oloc_copy(&req->r_base_oloc, oloc); 5097 req->r_flags = flags; 5098 5099 ret = osd_req_op_cls_init(req, 0, class, method); 5100 if (ret) 5101 goto out_put_req; 5102 5103 if (req_page) 5104 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 5105 0, false, false); 5106 if (resp_pages) 5107 osd_req_op_cls_response_data_pages(req, 0, resp_pages, 5108 *resp_len, 0, false, false); 5109 5110 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 5111 if (ret) 5112 goto out_put_req; 5113 5114 ceph_osdc_start_request(osdc, req, false); 5115 ret = ceph_osdc_wait_request(osdc, req); 5116 if (ret >= 0) { 5117 ret = req->r_ops[0].rval; 5118 if (resp_pages) 5119 *resp_len = req->r_ops[0].outdata_len; 5120 } 5121 5122 out_put_req: 5123 ceph_osdc_put_request(req); 5124 return ret; 5125 } 5126 EXPORT_SYMBOL(ceph_osdc_call); 5127 5128 /* 5129 * reset all osd connections 5130 */ 5131 void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc) 5132 { 5133 struct rb_node *n; 5134 5135 down_write(&osdc->lock); 5136 for (n = rb_first(&osdc->osds); n; ) { 5137 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 5138 5139 n = rb_next(n); 5140 if (!reopen_osd(osd)) 5141 kick_osd_requests(osd); 5142 } 5143 up_write(&osdc->lock); 5144 } 5145 5146 /* 5147 * init, shutdown 5148 */ 5149 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 5150 { 5151 int err; 5152 5153 dout("init\n"); 5154 osdc->client = client; 5155 init_rwsem(&osdc->lock); 5156 osdc->osds = RB_ROOT; 5157 INIT_LIST_HEAD(&osdc->osd_lru); 5158 spin_lock_init(&osdc->osd_lru_lock); 5159 osd_init(&osdc->homeless_osd); 5160 osdc->homeless_osd.o_osdc = osdc; 5161 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 5162 osdc->last_linger_id = CEPH_LINGER_ID_START; 5163 osdc->linger_requests = RB_ROOT; 5164 osdc->map_checks = RB_ROOT; 5165 osdc->linger_map_checks = RB_ROOT; 5166 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 5167 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 5168 5169 err = -ENOMEM; 5170 osdc->osdmap = ceph_osdmap_alloc(); 5171 if (!osdc->osdmap) 5172 goto out; 5173 5174 osdc->req_mempool = mempool_create_slab_pool(10, 5175 ceph_osd_request_cache); 5176 if (!osdc->req_mempool) 5177 goto out_map; 5178 5179 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 5180 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op"); 5181 if (err < 0) 5182 goto out_mempool; 5183 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 5184 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, 5185 "osd_op_reply"); 5186 if (err < 0) 5187 goto out_msgpool; 5188 5189 err = -ENOMEM; 5190 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 5191 if (!osdc->notify_wq) 5192 goto out_msgpool_reply; 5193 5194 osdc->completion_wq = create_singlethread_workqueue("ceph-completion"); 5195 if (!osdc->completion_wq) 5196 goto out_notify_wq; 5197 5198 schedule_delayed_work(&osdc->timeout_work, 5199 osdc->client->options->osd_keepalive_timeout); 5200 schedule_delayed_work(&osdc->osds_timeout_work, 5201 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 5202 5203 return 0; 5204 5205 out_notify_wq: 5206 destroy_workqueue(osdc->notify_wq); 5207 out_msgpool_reply: 5208 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5209 out_msgpool: 5210 ceph_msgpool_destroy(&osdc->msgpool_op); 5211 out_mempool: 5212 mempool_destroy(osdc->req_mempool); 5213 out_map: 5214 ceph_osdmap_destroy(osdc->osdmap); 5215 out: 5216 return err; 5217 } 5218 5219 void ceph_osdc_stop(struct ceph_osd_client *osdc) 5220 { 5221 destroy_workqueue(osdc->completion_wq); 5222 destroy_workqueue(osdc->notify_wq); 5223 cancel_delayed_work_sync(&osdc->timeout_work); 5224 cancel_delayed_work_sync(&osdc->osds_timeout_work); 5225 5226 down_write(&osdc->lock); 5227 while (!RB_EMPTY_ROOT(&osdc->osds)) { 5228 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 5229 struct ceph_osd, o_node); 5230 close_osd(osd); 5231 } 5232 up_write(&osdc->lock); 5233 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1); 5234 osd_cleanup(&osdc->homeless_osd); 5235 5236 WARN_ON(!list_empty(&osdc->osd_lru)); 5237 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 5238 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 5239 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 5240 WARN_ON(atomic_read(&osdc->num_requests)); 5241 WARN_ON(atomic_read(&osdc->num_homeless)); 5242 5243 ceph_osdmap_destroy(osdc->osdmap); 5244 mempool_destroy(osdc->req_mempool); 5245 ceph_msgpool_destroy(&osdc->msgpool_op); 5246 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5247 } 5248 5249 static int osd_req_op_copy_from_init(struct ceph_osd_request *req, 5250 u64 src_snapid, u64 src_version, 5251 struct ceph_object_id *src_oid, 5252 struct ceph_object_locator *src_oloc, 5253 u32 src_fadvise_flags, 5254 u32 dst_fadvise_flags, 5255 u32 truncate_seq, u64 truncate_size, 5256 u8 copy_from_flags) 5257 { 5258 struct ceph_osd_req_op *op; 5259 struct page **pages; 5260 void *p, *end; 5261 5262 pages = ceph_alloc_page_vector(1, GFP_KERNEL); 5263 if (IS_ERR(pages)) 5264 return PTR_ERR(pages); 5265 5266 op = osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2, 5267 dst_fadvise_flags); 5268 op->copy_from.snapid = src_snapid; 5269 op->copy_from.src_version = src_version; 5270 op->copy_from.flags = copy_from_flags; 5271 op->copy_from.src_fadvise_flags = src_fadvise_flags; 5272 5273 p = page_address(pages[0]); 5274 end = p + PAGE_SIZE; 5275 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len); 5276 encode_oloc(&p, end, src_oloc); 5277 ceph_encode_32(&p, truncate_seq); 5278 ceph_encode_64(&p, truncate_size); 5279 op->indata_len = PAGE_SIZE - (end - p); 5280 5281 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages, 5282 op->indata_len, 0, false, true); 5283 return 0; 5284 } 5285 5286 int ceph_osdc_copy_from(struct ceph_osd_client *osdc, 5287 u64 src_snapid, u64 src_version, 5288 struct ceph_object_id *src_oid, 5289 struct ceph_object_locator *src_oloc, 5290 u32 src_fadvise_flags, 5291 struct ceph_object_id *dst_oid, 5292 struct ceph_object_locator *dst_oloc, 5293 u32 dst_fadvise_flags, 5294 u32 truncate_seq, u64 truncate_size, 5295 u8 copy_from_flags) 5296 { 5297 struct ceph_osd_request *req; 5298 int ret; 5299 5300 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL); 5301 if (!req) 5302 return -ENOMEM; 5303 5304 req->r_flags = CEPH_OSD_FLAG_WRITE; 5305 5306 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc); 5307 ceph_oid_copy(&req->r_t.base_oid, dst_oid); 5308 5309 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid, 5310 src_oloc, src_fadvise_flags, 5311 dst_fadvise_flags, truncate_seq, 5312 truncate_size, copy_from_flags); 5313 if (ret) 5314 goto out; 5315 5316 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL); 5317 if (ret) 5318 goto out; 5319 5320 ceph_osdc_start_request(osdc, req, false); 5321 ret = ceph_osdc_wait_request(osdc, req); 5322 5323 out: 5324 ceph_osdc_put_request(req); 5325 return ret; 5326 } 5327 EXPORT_SYMBOL(ceph_osdc_copy_from); 5328 5329 int __init ceph_osdc_setup(void) 5330 { 5331 size_t size = sizeof(struct ceph_osd_request) + 5332 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 5333 5334 BUG_ON(ceph_osd_request_cache); 5335 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 5336 0, 0, NULL); 5337 5338 return ceph_osd_request_cache ? 0 : -ENOMEM; 5339 } 5340 5341 void ceph_osdc_cleanup(void) 5342 { 5343 BUG_ON(!ceph_osd_request_cache); 5344 kmem_cache_destroy(ceph_osd_request_cache); 5345 ceph_osd_request_cache = NULL; 5346 } 5347 5348 /* 5349 * handle incoming message 5350 */ 5351 static void osd_dispatch(struct ceph_connection *con, struct ceph_msg *msg) 5352 { 5353 struct ceph_osd *osd = con->private; 5354 struct ceph_osd_client *osdc = osd->o_osdc; 5355 int type = le16_to_cpu(msg->hdr.type); 5356 5357 switch (type) { 5358 case CEPH_MSG_OSD_MAP: 5359 ceph_osdc_handle_map(osdc, msg); 5360 break; 5361 case CEPH_MSG_OSD_OPREPLY: 5362 handle_reply(osd, msg); 5363 break; 5364 case CEPH_MSG_OSD_BACKOFF: 5365 handle_backoff(osd, msg); 5366 break; 5367 case CEPH_MSG_WATCH_NOTIFY: 5368 handle_watch_notify(osdc, msg); 5369 break; 5370 5371 default: 5372 pr_err("received unknown message type %d %s\n", type, 5373 ceph_msg_type_name(type)); 5374 } 5375 5376 ceph_msg_put(msg); 5377 } 5378 5379 /* 5380 * Lookup and return message for incoming reply. Don't try to do 5381 * anything about a larger than preallocated data portion of the 5382 * message at the moment - for now, just skip the message. 5383 */ 5384 static struct ceph_msg *get_reply(struct ceph_connection *con, 5385 struct ceph_msg_header *hdr, 5386 int *skip) 5387 { 5388 struct ceph_osd *osd = con->private; 5389 struct ceph_osd_client *osdc = osd->o_osdc; 5390 struct ceph_msg *m = NULL; 5391 struct ceph_osd_request *req; 5392 int front_len = le32_to_cpu(hdr->front_len); 5393 int data_len = le32_to_cpu(hdr->data_len); 5394 u64 tid = le64_to_cpu(hdr->tid); 5395 5396 down_read(&osdc->lock); 5397 if (!osd_registered(osd)) { 5398 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 5399 *skip = 1; 5400 goto out_unlock_osdc; 5401 } 5402 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 5403 5404 mutex_lock(&osd->lock); 5405 req = lookup_request(&osd->o_requests, tid); 5406 if (!req) { 5407 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 5408 osd->o_osd, tid); 5409 *skip = 1; 5410 goto out_unlock_session; 5411 } 5412 5413 ceph_msg_revoke_incoming(req->r_reply); 5414 5415 if (front_len > req->r_reply->front_alloc_len) { 5416 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 5417 __func__, osd->o_osd, req->r_tid, front_len, 5418 req->r_reply->front_alloc_len); 5419 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 5420 false); 5421 if (!m) 5422 goto out_unlock_session; 5423 ceph_msg_put(req->r_reply); 5424 req->r_reply = m; 5425 } 5426 5427 if (data_len > req->r_reply->data_length) { 5428 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 5429 __func__, osd->o_osd, req->r_tid, data_len, 5430 req->r_reply->data_length); 5431 m = NULL; 5432 *skip = 1; 5433 goto out_unlock_session; 5434 } 5435 5436 m = ceph_msg_get(req->r_reply); 5437 dout("get_reply tid %lld %p\n", tid, m); 5438 5439 out_unlock_session: 5440 mutex_unlock(&osd->lock); 5441 out_unlock_osdc: 5442 up_read(&osdc->lock); 5443 return m; 5444 } 5445 5446 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 5447 { 5448 struct ceph_msg *m; 5449 int type = le16_to_cpu(hdr->type); 5450 u32 front_len = le32_to_cpu(hdr->front_len); 5451 u32 data_len = le32_to_cpu(hdr->data_len); 5452 5453 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false); 5454 if (!m) 5455 return NULL; 5456 5457 if (data_len) { 5458 struct page **pages; 5459 5460 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 5461 GFP_NOIO); 5462 if (IS_ERR(pages)) { 5463 ceph_msg_put(m); 5464 return NULL; 5465 } 5466 5467 ceph_msg_data_add_pages(m, pages, data_len, 0, true); 5468 } 5469 5470 return m; 5471 } 5472 5473 static struct ceph_msg *osd_alloc_msg(struct ceph_connection *con, 5474 struct ceph_msg_header *hdr, 5475 int *skip) 5476 { 5477 struct ceph_osd *osd = con->private; 5478 int type = le16_to_cpu(hdr->type); 5479 5480 *skip = 0; 5481 switch (type) { 5482 case CEPH_MSG_OSD_MAP: 5483 case CEPH_MSG_OSD_BACKOFF: 5484 case CEPH_MSG_WATCH_NOTIFY: 5485 return alloc_msg_with_page_vector(hdr); 5486 case CEPH_MSG_OSD_OPREPLY: 5487 return get_reply(con, hdr, skip); 5488 default: 5489 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 5490 osd->o_osd, type); 5491 *skip = 1; 5492 return NULL; 5493 } 5494 } 5495 5496 /* 5497 * Wrappers to refcount containing ceph_osd struct 5498 */ 5499 static struct ceph_connection *osd_get_con(struct ceph_connection *con) 5500 { 5501 struct ceph_osd *osd = con->private; 5502 if (get_osd(osd)) 5503 return con; 5504 return NULL; 5505 } 5506 5507 static void osd_put_con(struct ceph_connection *con) 5508 { 5509 struct ceph_osd *osd = con->private; 5510 put_osd(osd); 5511 } 5512 5513 /* 5514 * authentication 5515 */ 5516 5517 /* 5518 * Note: returned pointer is the address of a structure that's 5519 * managed separately. Caller must *not* attempt to free it. 5520 */ 5521 static struct ceph_auth_handshake * 5522 osd_get_authorizer(struct ceph_connection *con, int *proto, int force_new) 5523 { 5524 struct ceph_osd *o = con->private; 5525 struct ceph_osd_client *osdc = o->o_osdc; 5526 struct ceph_auth_client *ac = osdc->client->monc.auth; 5527 struct ceph_auth_handshake *auth = &o->o_auth; 5528 int ret; 5529 5530 ret = __ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD, 5531 force_new, proto, NULL, NULL); 5532 if (ret) 5533 return ERR_PTR(ret); 5534 5535 return auth; 5536 } 5537 5538 static int osd_add_authorizer_challenge(struct ceph_connection *con, 5539 void *challenge_buf, int challenge_buf_len) 5540 { 5541 struct ceph_osd *o = con->private; 5542 struct ceph_osd_client *osdc = o->o_osdc; 5543 struct ceph_auth_client *ac = osdc->client->monc.auth; 5544 5545 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer, 5546 challenge_buf, challenge_buf_len); 5547 } 5548 5549 static int osd_verify_authorizer_reply(struct ceph_connection *con) 5550 { 5551 struct ceph_osd *o = con->private; 5552 struct ceph_osd_client *osdc = o->o_osdc; 5553 struct ceph_auth_client *ac = osdc->client->monc.auth; 5554 struct ceph_auth_handshake *auth = &o->o_auth; 5555 5556 return ceph_auth_verify_authorizer_reply(ac, auth->authorizer, 5557 auth->authorizer_reply_buf, auth->authorizer_reply_buf_len, 5558 NULL, NULL, NULL, NULL); 5559 } 5560 5561 static int osd_invalidate_authorizer(struct ceph_connection *con) 5562 { 5563 struct ceph_osd *o = con->private; 5564 struct ceph_osd_client *osdc = o->o_osdc; 5565 struct ceph_auth_client *ac = osdc->client->monc.auth; 5566 5567 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 5568 return ceph_monc_validate_auth(&osdc->client->monc); 5569 } 5570 5571 static int osd_get_auth_request(struct ceph_connection *con, 5572 void *buf, int *buf_len, 5573 void **authorizer, int *authorizer_len) 5574 { 5575 struct ceph_osd *o = con->private; 5576 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth; 5577 struct ceph_auth_handshake *auth = &o->o_auth; 5578 int ret; 5579 5580 ret = ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD, 5581 buf, buf_len); 5582 if (ret) 5583 return ret; 5584 5585 *authorizer = auth->authorizer_buf; 5586 *authorizer_len = auth->authorizer_buf_len; 5587 return 0; 5588 } 5589 5590 static int osd_handle_auth_reply_more(struct ceph_connection *con, 5591 void *reply, int reply_len, 5592 void *buf, int *buf_len, 5593 void **authorizer, int *authorizer_len) 5594 { 5595 struct ceph_osd *o = con->private; 5596 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth; 5597 struct ceph_auth_handshake *auth = &o->o_auth; 5598 int ret; 5599 5600 ret = ceph_auth_handle_svc_reply_more(ac, auth, reply, reply_len, 5601 buf, buf_len); 5602 if (ret) 5603 return ret; 5604 5605 *authorizer = auth->authorizer_buf; 5606 *authorizer_len = auth->authorizer_buf_len; 5607 return 0; 5608 } 5609 5610 static int osd_handle_auth_done(struct ceph_connection *con, 5611 u64 global_id, void *reply, int reply_len, 5612 u8 *session_key, int *session_key_len, 5613 u8 *con_secret, int *con_secret_len) 5614 { 5615 struct ceph_osd *o = con->private; 5616 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth; 5617 struct ceph_auth_handshake *auth = &o->o_auth; 5618 5619 return ceph_auth_handle_svc_reply_done(ac, auth, reply, reply_len, 5620 session_key, session_key_len, 5621 con_secret, con_secret_len); 5622 } 5623 5624 static int osd_handle_auth_bad_method(struct ceph_connection *con, 5625 int used_proto, int result, 5626 const int *allowed_protos, int proto_cnt, 5627 const int *allowed_modes, int mode_cnt) 5628 { 5629 struct ceph_osd *o = con->private; 5630 struct ceph_mon_client *monc = &o->o_osdc->client->monc; 5631 int ret; 5632 5633 if (ceph_auth_handle_bad_authorizer(monc->auth, CEPH_ENTITY_TYPE_OSD, 5634 used_proto, result, 5635 allowed_protos, proto_cnt, 5636 allowed_modes, mode_cnt)) { 5637 ret = ceph_monc_validate_auth(monc); 5638 if (ret) 5639 return ret; 5640 } 5641 5642 return -EACCES; 5643 } 5644 5645 static void osd_reencode_message(struct ceph_msg *msg) 5646 { 5647 int type = le16_to_cpu(msg->hdr.type); 5648 5649 if (type == CEPH_MSG_OSD_OP) 5650 encode_request_finish(msg); 5651 } 5652 5653 static int osd_sign_message(struct ceph_msg *msg) 5654 { 5655 struct ceph_osd *o = msg->con->private; 5656 struct ceph_auth_handshake *auth = &o->o_auth; 5657 5658 return ceph_auth_sign_message(auth, msg); 5659 } 5660 5661 static int osd_check_message_signature(struct ceph_msg *msg) 5662 { 5663 struct ceph_osd *o = msg->con->private; 5664 struct ceph_auth_handshake *auth = &o->o_auth; 5665 5666 return ceph_auth_check_message_signature(auth, msg); 5667 } 5668 5669 static const struct ceph_connection_operations osd_con_ops = { 5670 .get = osd_get_con, 5671 .put = osd_put_con, 5672 .alloc_msg = osd_alloc_msg, 5673 .dispatch = osd_dispatch, 5674 .fault = osd_fault, 5675 .reencode_message = osd_reencode_message, 5676 .get_authorizer = osd_get_authorizer, 5677 .add_authorizer_challenge = osd_add_authorizer_challenge, 5678 .verify_authorizer_reply = osd_verify_authorizer_reply, 5679 .invalidate_authorizer = osd_invalidate_authorizer, 5680 .sign_message = osd_sign_message, 5681 .check_message_signature = osd_check_message_signature, 5682 .get_auth_request = osd_get_auth_request, 5683 .handle_auth_reply_more = osd_handle_auth_reply_more, 5684 .handle_auth_done = osd_handle_auth_done, 5685 .handle_auth_bad_method = osd_handle_auth_bad_method, 5686 }; 5687