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 kfree(op->extent.sparse_ext); 382 ceph_osd_data_release(&op->extent.osd_data); 383 break; 384 case CEPH_OSD_OP_CALL: 385 ceph_osd_data_release(&op->cls.request_info); 386 ceph_osd_data_release(&op->cls.request_data); 387 ceph_osd_data_release(&op->cls.response_data); 388 break; 389 case CEPH_OSD_OP_SETXATTR: 390 case CEPH_OSD_OP_CMPXATTR: 391 ceph_osd_data_release(&op->xattr.osd_data); 392 break; 393 case CEPH_OSD_OP_STAT: 394 ceph_osd_data_release(&op->raw_data_in); 395 break; 396 case CEPH_OSD_OP_NOTIFY_ACK: 397 ceph_osd_data_release(&op->notify_ack.request_data); 398 break; 399 case CEPH_OSD_OP_NOTIFY: 400 ceph_osd_data_release(&op->notify.request_data); 401 ceph_osd_data_release(&op->notify.response_data); 402 break; 403 case CEPH_OSD_OP_LIST_WATCHERS: 404 ceph_osd_data_release(&op->list_watchers.response_data); 405 break; 406 case CEPH_OSD_OP_COPY_FROM2: 407 ceph_osd_data_release(&op->copy_from.osd_data); 408 break; 409 default: 410 break; 411 } 412 } 413 414 /* 415 * Assumes @t is zero-initialized. 416 */ 417 static void target_init(struct ceph_osd_request_target *t) 418 { 419 ceph_oid_init(&t->base_oid); 420 ceph_oloc_init(&t->base_oloc); 421 ceph_oid_init(&t->target_oid); 422 ceph_oloc_init(&t->target_oloc); 423 424 ceph_osds_init(&t->acting); 425 ceph_osds_init(&t->up); 426 t->size = -1; 427 t->min_size = -1; 428 429 t->osd = CEPH_HOMELESS_OSD; 430 } 431 432 static void target_copy(struct ceph_osd_request_target *dest, 433 const struct ceph_osd_request_target *src) 434 { 435 ceph_oid_copy(&dest->base_oid, &src->base_oid); 436 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc); 437 ceph_oid_copy(&dest->target_oid, &src->target_oid); 438 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc); 439 440 dest->pgid = src->pgid; /* struct */ 441 dest->spgid = src->spgid; /* struct */ 442 dest->pg_num = src->pg_num; 443 dest->pg_num_mask = src->pg_num_mask; 444 ceph_osds_copy(&dest->acting, &src->acting); 445 ceph_osds_copy(&dest->up, &src->up); 446 dest->size = src->size; 447 dest->min_size = src->min_size; 448 dest->sort_bitwise = src->sort_bitwise; 449 dest->recovery_deletes = src->recovery_deletes; 450 451 dest->flags = src->flags; 452 dest->used_replica = src->used_replica; 453 dest->paused = src->paused; 454 455 dest->epoch = src->epoch; 456 dest->last_force_resend = src->last_force_resend; 457 458 dest->osd = src->osd; 459 } 460 461 static void target_destroy(struct ceph_osd_request_target *t) 462 { 463 ceph_oid_destroy(&t->base_oid); 464 ceph_oloc_destroy(&t->base_oloc); 465 ceph_oid_destroy(&t->target_oid); 466 ceph_oloc_destroy(&t->target_oloc); 467 } 468 469 /* 470 * requests 471 */ 472 static void request_release_checks(struct ceph_osd_request *req) 473 { 474 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 475 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node)); 476 WARN_ON(!list_empty(&req->r_private_item)); 477 WARN_ON(req->r_osd); 478 } 479 480 static void ceph_osdc_release_request(struct kref *kref) 481 { 482 struct ceph_osd_request *req = container_of(kref, 483 struct ceph_osd_request, r_kref); 484 unsigned int which; 485 486 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 487 req->r_request, req->r_reply); 488 request_release_checks(req); 489 490 if (req->r_request) 491 ceph_msg_put(req->r_request); 492 if (req->r_reply) 493 ceph_msg_put(req->r_reply); 494 495 for (which = 0; which < req->r_num_ops; which++) 496 osd_req_op_data_release(req, which); 497 498 target_destroy(&req->r_t); 499 ceph_put_snap_context(req->r_snapc); 500 501 if (req->r_mempool) 502 mempool_free(req, req->r_osdc->req_mempool); 503 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) 504 kmem_cache_free(ceph_osd_request_cache, req); 505 else 506 kfree(req); 507 } 508 509 void ceph_osdc_get_request(struct ceph_osd_request *req) 510 { 511 dout("%s %p (was %d)\n", __func__, req, 512 kref_read(&req->r_kref)); 513 kref_get(&req->r_kref); 514 } 515 EXPORT_SYMBOL(ceph_osdc_get_request); 516 517 void ceph_osdc_put_request(struct ceph_osd_request *req) 518 { 519 if (req) { 520 dout("%s %p (was %d)\n", __func__, req, 521 kref_read(&req->r_kref)); 522 kref_put(&req->r_kref, ceph_osdc_release_request); 523 } 524 } 525 EXPORT_SYMBOL(ceph_osdc_put_request); 526 527 static void request_init(struct ceph_osd_request *req) 528 { 529 /* req only, each op is zeroed in osd_req_op_init() */ 530 memset(req, 0, sizeof(*req)); 531 532 kref_init(&req->r_kref); 533 init_completion(&req->r_completion); 534 RB_CLEAR_NODE(&req->r_node); 535 RB_CLEAR_NODE(&req->r_mc_node); 536 INIT_LIST_HEAD(&req->r_private_item); 537 538 target_init(&req->r_t); 539 } 540 541 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 542 struct ceph_snap_context *snapc, 543 unsigned int num_ops, 544 bool use_mempool, 545 gfp_t gfp_flags) 546 { 547 struct ceph_osd_request *req; 548 549 if (use_mempool) { 550 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 551 req = mempool_alloc(osdc->req_mempool, gfp_flags); 552 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 553 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 554 } else { 555 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 556 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags); 557 } 558 if (unlikely(!req)) 559 return NULL; 560 561 request_init(req); 562 req->r_osdc = osdc; 563 req->r_mempool = use_mempool; 564 req->r_num_ops = num_ops; 565 req->r_snapid = CEPH_NOSNAP; 566 req->r_snapc = ceph_get_snap_context(snapc); 567 568 dout("%s req %p\n", __func__, req); 569 return req; 570 } 571 EXPORT_SYMBOL(ceph_osdc_alloc_request); 572 573 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc) 574 { 575 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); 576 } 577 578 static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp, 579 int num_request_data_items, 580 int num_reply_data_items) 581 { 582 struct ceph_osd_client *osdc = req->r_osdc; 583 struct ceph_msg *msg; 584 int msg_size; 585 586 WARN_ON(req->r_request || req->r_reply); 587 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 588 WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); 589 590 /* create request message */ 591 msg_size = CEPH_ENCODING_START_BLK_LEN + 592 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 593 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */ 594 msg_size += CEPH_ENCODING_START_BLK_LEN + 595 sizeof(struct ceph_osd_reqid); /* reqid */ 596 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */ 597 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */ 598 msg_size += CEPH_ENCODING_START_BLK_LEN + 599 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 600 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 601 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 602 msg_size += 8; /* snapid */ 603 msg_size += 8; /* snap_seq */ 604 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 605 msg_size += 4 + 8; /* retry_attempt, features */ 606 607 if (req->r_mempool) 608 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size, 609 num_request_data_items); 610 else 611 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size, 612 num_request_data_items, gfp, true); 613 if (!msg) 614 return -ENOMEM; 615 616 memset(msg->front.iov_base, 0, msg->front.iov_len); 617 req->r_request = msg; 618 619 /* create reply message */ 620 msg_size = OSD_OPREPLY_FRONT_LEN; 621 msg_size += req->r_base_oid.name_len; 622 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 623 624 if (req->r_mempool) 625 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size, 626 num_reply_data_items); 627 else 628 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size, 629 num_reply_data_items, gfp, true); 630 if (!msg) 631 return -ENOMEM; 632 633 req->r_reply = msg; 634 635 return 0; 636 } 637 638 static bool osd_req_opcode_valid(u16 opcode) 639 { 640 switch (opcode) { 641 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 642 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 643 #undef GENERATE_CASE 644 default: 645 return false; 646 } 647 } 648 649 static void get_num_data_items(struct ceph_osd_request *req, 650 int *num_request_data_items, 651 int *num_reply_data_items) 652 { 653 struct ceph_osd_req_op *op; 654 655 *num_request_data_items = 0; 656 *num_reply_data_items = 0; 657 658 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { 659 switch (op->op) { 660 /* request */ 661 case CEPH_OSD_OP_WRITE: 662 case CEPH_OSD_OP_WRITEFULL: 663 case CEPH_OSD_OP_SETXATTR: 664 case CEPH_OSD_OP_CMPXATTR: 665 case CEPH_OSD_OP_NOTIFY_ACK: 666 case CEPH_OSD_OP_COPY_FROM2: 667 *num_request_data_items += 1; 668 break; 669 670 /* reply */ 671 case CEPH_OSD_OP_STAT: 672 case CEPH_OSD_OP_READ: 673 case CEPH_OSD_OP_LIST_WATCHERS: 674 *num_reply_data_items += 1; 675 break; 676 677 /* both */ 678 case CEPH_OSD_OP_NOTIFY: 679 *num_request_data_items += 1; 680 *num_reply_data_items += 1; 681 break; 682 case CEPH_OSD_OP_CALL: 683 *num_request_data_items += 2; 684 *num_reply_data_items += 1; 685 break; 686 687 default: 688 WARN_ON(!osd_req_opcode_valid(op->op)); 689 break; 690 } 691 } 692 } 693 694 /* 695 * oid, oloc and OSD op opcode(s) must be filled in before this function 696 * is called. 697 */ 698 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 699 { 700 int num_request_data_items, num_reply_data_items; 701 702 get_num_data_items(req, &num_request_data_items, &num_reply_data_items); 703 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items, 704 num_reply_data_items); 705 } 706 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 707 708 /* 709 * This is an osd op init function for opcodes that have no data or 710 * other information associated with them. It also serves as a 711 * common init routine for all the other init functions, below. 712 */ 713 struct ceph_osd_req_op * 714 osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 715 u16 opcode, u32 flags) 716 { 717 struct ceph_osd_req_op *op; 718 719 BUG_ON(which >= osd_req->r_num_ops); 720 BUG_ON(!osd_req_opcode_valid(opcode)); 721 722 op = &osd_req->r_ops[which]; 723 memset(op, 0, sizeof (*op)); 724 op->op = opcode; 725 op->flags = flags; 726 727 return op; 728 } 729 EXPORT_SYMBOL(osd_req_op_init); 730 731 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 732 unsigned int which, u16 opcode, 733 u64 offset, u64 length, 734 u64 truncate_size, u32 truncate_seq) 735 { 736 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, 737 opcode, 0); 738 size_t payload_len = 0; 739 740 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 741 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 742 opcode != CEPH_OSD_OP_TRUNCATE); 743 744 op->extent.offset = offset; 745 op->extent.length = length; 746 op->extent.truncate_size = truncate_size; 747 op->extent.truncate_seq = truncate_seq; 748 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 749 payload_len += length; 750 751 op->indata_len = payload_len; 752 } 753 EXPORT_SYMBOL(osd_req_op_extent_init); 754 755 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 756 unsigned int which, u64 length) 757 { 758 struct ceph_osd_req_op *op; 759 u64 previous; 760 761 BUG_ON(which >= osd_req->r_num_ops); 762 op = &osd_req->r_ops[which]; 763 previous = op->extent.length; 764 765 if (length == previous) 766 return; /* Nothing to do */ 767 BUG_ON(length > previous); 768 769 op->extent.length = length; 770 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 771 op->indata_len -= previous - length; 772 } 773 EXPORT_SYMBOL(osd_req_op_extent_update); 774 775 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 776 unsigned int which, u64 offset_inc) 777 { 778 struct ceph_osd_req_op *op, *prev_op; 779 780 BUG_ON(which + 1 >= osd_req->r_num_ops); 781 782 prev_op = &osd_req->r_ops[which]; 783 op = osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 784 /* dup previous one */ 785 op->indata_len = prev_op->indata_len; 786 op->outdata_len = prev_op->outdata_len; 787 op->extent = prev_op->extent; 788 /* adjust offset */ 789 op->extent.offset += offset_inc; 790 op->extent.length -= offset_inc; 791 792 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 793 op->indata_len -= offset_inc; 794 } 795 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 796 797 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 798 const char *class, const char *method) 799 { 800 struct ceph_osd_req_op *op; 801 struct ceph_pagelist *pagelist; 802 size_t payload_len = 0; 803 size_t size; 804 int ret; 805 806 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0); 807 808 pagelist = ceph_pagelist_alloc(GFP_NOFS); 809 if (!pagelist) 810 return -ENOMEM; 811 812 op->cls.class_name = class; 813 size = strlen(class); 814 BUG_ON(size > (size_t) U8_MAX); 815 op->cls.class_len = size; 816 ret = ceph_pagelist_append(pagelist, class, size); 817 if (ret) 818 goto err_pagelist_free; 819 payload_len += size; 820 821 op->cls.method_name = method; 822 size = strlen(method); 823 BUG_ON(size > (size_t) U8_MAX); 824 op->cls.method_len = size; 825 ret = ceph_pagelist_append(pagelist, method, size); 826 if (ret) 827 goto err_pagelist_free; 828 payload_len += size; 829 830 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 831 op->indata_len = payload_len; 832 return 0; 833 834 err_pagelist_free: 835 ceph_pagelist_release(pagelist); 836 return ret; 837 } 838 EXPORT_SYMBOL(osd_req_op_cls_init); 839 840 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 841 u16 opcode, const char *name, const void *value, 842 size_t size, u8 cmp_op, u8 cmp_mode) 843 { 844 struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, 845 opcode, 0); 846 struct ceph_pagelist *pagelist; 847 size_t payload_len; 848 int ret; 849 850 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 851 852 pagelist = ceph_pagelist_alloc(GFP_NOFS); 853 if (!pagelist) 854 return -ENOMEM; 855 856 payload_len = strlen(name); 857 op->xattr.name_len = payload_len; 858 ret = ceph_pagelist_append(pagelist, name, payload_len); 859 if (ret) 860 goto err_pagelist_free; 861 862 op->xattr.value_len = size; 863 ret = ceph_pagelist_append(pagelist, value, size); 864 if (ret) 865 goto err_pagelist_free; 866 payload_len += size; 867 868 op->xattr.cmp_op = cmp_op; 869 op->xattr.cmp_mode = cmp_mode; 870 871 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 872 op->indata_len = payload_len; 873 return 0; 874 875 err_pagelist_free: 876 ceph_pagelist_release(pagelist); 877 return ret; 878 } 879 EXPORT_SYMBOL(osd_req_op_xattr_init); 880 881 /* 882 * @watch_opcode: CEPH_OSD_WATCH_OP_* 883 */ 884 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 885 u8 watch_opcode, u64 cookie, u32 gen) 886 { 887 struct ceph_osd_req_op *op; 888 889 op = osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 890 op->watch.cookie = cookie; 891 op->watch.op = watch_opcode; 892 op->watch.gen = gen; 893 } 894 895 /* 896 * prot_ver, timeout and notify payload (may be empty) should already be 897 * encoded in @request_pl 898 */ 899 static void osd_req_op_notify_init(struct ceph_osd_request *req, int which, 900 u64 cookie, struct ceph_pagelist *request_pl) 901 { 902 struct ceph_osd_req_op *op; 903 904 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 905 op->notify.cookie = cookie; 906 907 ceph_osd_data_pagelist_init(&op->notify.request_data, request_pl); 908 op->indata_len = request_pl->length; 909 } 910 911 /* 912 * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_* 913 */ 914 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 915 unsigned int which, 916 u64 expected_object_size, 917 u64 expected_write_size, 918 u32 flags) 919 { 920 struct ceph_osd_req_op *op; 921 922 op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_SETALLOCHINT, 0); 923 op->alloc_hint.expected_object_size = expected_object_size; 924 op->alloc_hint.expected_write_size = expected_write_size; 925 op->alloc_hint.flags = flags; 926 927 /* 928 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 929 * not worth a feature bit. Set FAILOK per-op flag to make 930 * sure older osds don't trip over an unsupported opcode. 931 */ 932 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 933 } 934 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 935 936 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 937 struct ceph_osd_data *osd_data) 938 { 939 u64 length = ceph_osd_data_length(osd_data); 940 941 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 942 BUG_ON(length > (u64) SIZE_MAX); 943 if (length) 944 ceph_msg_data_add_pages(msg, osd_data->pages, 945 length, osd_data->alignment, false); 946 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 947 BUG_ON(!length); 948 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 949 #ifdef CONFIG_BLOCK 950 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 951 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length); 952 #endif 953 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) { 954 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos); 955 } else { 956 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 957 } 958 } 959 960 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 961 const struct ceph_osd_req_op *src) 962 { 963 switch (src->op) { 964 case CEPH_OSD_OP_STAT: 965 break; 966 case CEPH_OSD_OP_READ: 967 case CEPH_OSD_OP_WRITE: 968 case CEPH_OSD_OP_WRITEFULL: 969 case CEPH_OSD_OP_ZERO: 970 case CEPH_OSD_OP_TRUNCATE: 971 dst->extent.offset = cpu_to_le64(src->extent.offset); 972 dst->extent.length = cpu_to_le64(src->extent.length); 973 dst->extent.truncate_size = 974 cpu_to_le64(src->extent.truncate_size); 975 dst->extent.truncate_seq = 976 cpu_to_le32(src->extent.truncate_seq); 977 break; 978 case CEPH_OSD_OP_CALL: 979 dst->cls.class_len = src->cls.class_len; 980 dst->cls.method_len = src->cls.method_len; 981 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 982 break; 983 case CEPH_OSD_OP_WATCH: 984 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 985 dst->watch.ver = cpu_to_le64(0); 986 dst->watch.op = src->watch.op; 987 dst->watch.gen = cpu_to_le32(src->watch.gen); 988 break; 989 case CEPH_OSD_OP_NOTIFY_ACK: 990 break; 991 case CEPH_OSD_OP_NOTIFY: 992 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 993 break; 994 case CEPH_OSD_OP_LIST_WATCHERS: 995 break; 996 case CEPH_OSD_OP_SETALLOCHINT: 997 dst->alloc_hint.expected_object_size = 998 cpu_to_le64(src->alloc_hint.expected_object_size); 999 dst->alloc_hint.expected_write_size = 1000 cpu_to_le64(src->alloc_hint.expected_write_size); 1001 dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags); 1002 break; 1003 case CEPH_OSD_OP_SETXATTR: 1004 case CEPH_OSD_OP_CMPXATTR: 1005 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 1006 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 1007 dst->xattr.cmp_op = src->xattr.cmp_op; 1008 dst->xattr.cmp_mode = src->xattr.cmp_mode; 1009 break; 1010 case CEPH_OSD_OP_CREATE: 1011 case CEPH_OSD_OP_DELETE: 1012 break; 1013 case CEPH_OSD_OP_COPY_FROM2: 1014 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid); 1015 dst->copy_from.src_version = 1016 cpu_to_le64(src->copy_from.src_version); 1017 dst->copy_from.flags = src->copy_from.flags; 1018 dst->copy_from.src_fadvise_flags = 1019 cpu_to_le32(src->copy_from.src_fadvise_flags); 1020 break; 1021 default: 1022 pr_err("unsupported osd opcode %s\n", 1023 ceph_osd_op_name(src->op)); 1024 WARN_ON(1); 1025 1026 return 0; 1027 } 1028 1029 dst->op = cpu_to_le16(src->op); 1030 dst->flags = cpu_to_le32(src->flags); 1031 dst->payload_len = cpu_to_le32(src->indata_len); 1032 1033 return src->indata_len; 1034 } 1035 1036 /* 1037 * build new request AND message, calculate layout, and adjust file 1038 * extent as needed. 1039 * 1040 * if the file was recently truncated, we include information about its 1041 * old and new size so that the object can be updated appropriately. (we 1042 * avoid synchronously deleting truncated objects because it's slow.) 1043 */ 1044 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 1045 struct ceph_file_layout *layout, 1046 struct ceph_vino vino, 1047 u64 off, u64 *plen, 1048 unsigned int which, int num_ops, 1049 int opcode, int flags, 1050 struct ceph_snap_context *snapc, 1051 u32 truncate_seq, 1052 u64 truncate_size, 1053 bool use_mempool) 1054 { 1055 struct ceph_osd_request *req; 1056 u64 objnum = 0; 1057 u64 objoff = 0; 1058 u64 objlen = 0; 1059 int r; 1060 1061 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 1062 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 1063 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 1064 1065 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 1066 GFP_NOFS); 1067 if (!req) { 1068 r = -ENOMEM; 1069 goto fail; 1070 } 1071 1072 /* calculate max write size */ 1073 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 1074 if (r) 1075 goto fail; 1076 1077 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 1078 osd_req_op_init(req, which, opcode, 0); 1079 } else { 1080 u32 object_size = layout->object_size; 1081 u32 object_base = off - objoff; 1082 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 1083 if (truncate_size <= object_base) { 1084 truncate_size = 0; 1085 } else { 1086 truncate_size -= object_base; 1087 if (truncate_size > object_size) 1088 truncate_size = object_size; 1089 } 1090 } 1091 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 1092 truncate_size, truncate_seq); 1093 } 1094 1095 req->r_base_oloc.pool = layout->pool_id; 1096 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); 1097 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 1098 req->r_flags = flags | osdc->client->options->read_from_replica; 1099 1100 req->r_snapid = vino.snap; 1101 if (flags & CEPH_OSD_FLAG_WRITE) 1102 req->r_data_offset = off; 1103 1104 if (num_ops > 1) 1105 /* 1106 * This is a special case for ceph_writepages_start(), but it 1107 * also covers ceph_uninline_data(). If more multi-op request 1108 * use cases emerge, we will need a separate helper. 1109 */ 1110 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0); 1111 else 1112 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 1113 if (r) 1114 goto fail; 1115 1116 return req; 1117 1118 fail: 1119 ceph_osdc_put_request(req); 1120 return ERR_PTR(r); 1121 } 1122 EXPORT_SYMBOL(ceph_osdc_new_request); 1123 1124 int __ceph_alloc_sparse_ext_map(struct ceph_osd_req_op *op, int cnt) 1125 { 1126 op->extent.sparse_ext_cnt = cnt; 1127 op->extent.sparse_ext = kmalloc_array(cnt, 1128 sizeof(*op->extent.sparse_ext), 1129 GFP_NOFS); 1130 if (!op->extent.sparse_ext) 1131 return -ENOMEM; 1132 return 0; 1133 } 1134 EXPORT_SYMBOL(__ceph_alloc_sparse_ext_map); 1135 1136 /* 1137 * We keep osd requests in an rbtree, sorted by ->r_tid. 1138 */ 1139 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 1140 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 1141 1142 /* 1143 * Call @fn on each OSD request as long as @fn returns 0. 1144 */ 1145 static void for_each_request(struct ceph_osd_client *osdc, 1146 int (*fn)(struct ceph_osd_request *req, void *arg), 1147 void *arg) 1148 { 1149 struct rb_node *n, *p; 1150 1151 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 1152 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 1153 1154 for (p = rb_first(&osd->o_requests); p; ) { 1155 struct ceph_osd_request *req = 1156 rb_entry(p, struct ceph_osd_request, r_node); 1157 1158 p = rb_next(p); 1159 if (fn(req, arg)) 1160 return; 1161 } 1162 } 1163 1164 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 1165 struct ceph_osd_request *req = 1166 rb_entry(p, struct ceph_osd_request, r_node); 1167 1168 p = rb_next(p); 1169 if (fn(req, arg)) 1170 return; 1171 } 1172 } 1173 1174 static bool osd_homeless(struct ceph_osd *osd) 1175 { 1176 return osd->o_osd == CEPH_HOMELESS_OSD; 1177 } 1178 1179 static bool osd_registered(struct ceph_osd *osd) 1180 { 1181 verify_osdc_locked(osd->o_osdc); 1182 1183 return !RB_EMPTY_NODE(&osd->o_node); 1184 } 1185 1186 /* 1187 * Assumes @osd is zero-initialized. 1188 */ 1189 static void osd_init(struct ceph_osd *osd) 1190 { 1191 refcount_set(&osd->o_ref, 1); 1192 RB_CLEAR_NODE(&osd->o_node); 1193 spin_lock_init(&osd->o_requests_lock); 1194 osd->o_requests = RB_ROOT; 1195 osd->o_linger_requests = RB_ROOT; 1196 osd->o_backoff_mappings = RB_ROOT; 1197 osd->o_backoffs_by_id = RB_ROOT; 1198 INIT_LIST_HEAD(&osd->o_osd_lru); 1199 INIT_LIST_HEAD(&osd->o_keepalive_item); 1200 osd->o_incarnation = 1; 1201 mutex_init(&osd->lock); 1202 } 1203 1204 static void osd_cleanup(struct ceph_osd *osd) 1205 { 1206 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1207 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1208 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1209 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings)); 1210 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id)); 1211 WARN_ON(!list_empty(&osd->o_osd_lru)); 1212 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1213 1214 if (osd->o_auth.authorizer) { 1215 WARN_ON(osd_homeless(osd)); 1216 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1217 } 1218 } 1219 1220 /* 1221 * Track open sessions with osds. 1222 */ 1223 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1224 { 1225 struct ceph_osd *osd; 1226 1227 WARN_ON(onum == CEPH_HOMELESS_OSD); 1228 1229 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1230 osd_init(osd); 1231 osd->o_osdc = osdc; 1232 osd->o_osd = onum; 1233 1234 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1235 1236 return osd; 1237 } 1238 1239 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1240 { 1241 if (refcount_inc_not_zero(&osd->o_ref)) { 1242 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1, 1243 refcount_read(&osd->o_ref)); 1244 return osd; 1245 } else { 1246 dout("get_osd %p FAIL\n", osd); 1247 return NULL; 1248 } 1249 } 1250 1251 static void put_osd(struct ceph_osd *osd) 1252 { 1253 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref), 1254 refcount_read(&osd->o_ref) - 1); 1255 if (refcount_dec_and_test(&osd->o_ref)) { 1256 osd_cleanup(osd); 1257 kfree(osd); 1258 } 1259 } 1260 1261 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1262 1263 static void __move_osd_to_lru(struct ceph_osd *osd) 1264 { 1265 struct ceph_osd_client *osdc = osd->o_osdc; 1266 1267 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1268 BUG_ON(!list_empty(&osd->o_osd_lru)); 1269 1270 spin_lock(&osdc->osd_lru_lock); 1271 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1272 spin_unlock(&osdc->osd_lru_lock); 1273 1274 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1275 } 1276 1277 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1278 { 1279 if (RB_EMPTY_ROOT(&osd->o_requests) && 1280 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1281 __move_osd_to_lru(osd); 1282 } 1283 1284 static void __remove_osd_from_lru(struct ceph_osd *osd) 1285 { 1286 struct ceph_osd_client *osdc = osd->o_osdc; 1287 1288 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1289 1290 spin_lock(&osdc->osd_lru_lock); 1291 if (!list_empty(&osd->o_osd_lru)) 1292 list_del_init(&osd->o_osd_lru); 1293 spin_unlock(&osdc->osd_lru_lock); 1294 } 1295 1296 /* 1297 * Close the connection and assign any leftover requests to the 1298 * homeless session. 1299 */ 1300 static void close_osd(struct ceph_osd *osd) 1301 { 1302 struct ceph_osd_client *osdc = osd->o_osdc; 1303 struct rb_node *n; 1304 1305 verify_osdc_wrlocked(osdc); 1306 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1307 1308 ceph_con_close(&osd->o_con); 1309 1310 for (n = rb_first(&osd->o_requests); n; ) { 1311 struct ceph_osd_request *req = 1312 rb_entry(n, struct ceph_osd_request, r_node); 1313 1314 n = rb_next(n); /* unlink_request() */ 1315 1316 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1317 unlink_request(osd, req); 1318 link_request(&osdc->homeless_osd, req); 1319 } 1320 for (n = rb_first(&osd->o_linger_requests); n; ) { 1321 struct ceph_osd_linger_request *lreq = 1322 rb_entry(n, struct ceph_osd_linger_request, node); 1323 1324 n = rb_next(n); /* unlink_linger() */ 1325 1326 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1327 lreq->linger_id); 1328 unlink_linger(osd, lreq); 1329 link_linger(&osdc->homeless_osd, lreq); 1330 } 1331 clear_backoffs(osd); 1332 1333 __remove_osd_from_lru(osd); 1334 erase_osd(&osdc->osds, osd); 1335 put_osd(osd); 1336 } 1337 1338 /* 1339 * reset osd connect 1340 */ 1341 static int reopen_osd(struct ceph_osd *osd) 1342 { 1343 struct ceph_entity_addr *peer_addr; 1344 1345 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1346 1347 if (RB_EMPTY_ROOT(&osd->o_requests) && 1348 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1349 close_osd(osd); 1350 return -ENODEV; 1351 } 1352 1353 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1354 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1355 !ceph_con_opened(&osd->o_con)) { 1356 struct rb_node *n; 1357 1358 dout("osd addr hasn't changed and connection never opened, " 1359 "letting msgr retry\n"); 1360 /* touch each r_stamp for handle_timeout()'s benfit */ 1361 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1362 struct ceph_osd_request *req = 1363 rb_entry(n, struct ceph_osd_request, r_node); 1364 req->r_stamp = jiffies; 1365 } 1366 1367 return -EAGAIN; 1368 } 1369 1370 ceph_con_close(&osd->o_con); 1371 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1372 osd->o_incarnation++; 1373 1374 return 0; 1375 } 1376 1377 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1378 bool wrlocked) 1379 { 1380 struct ceph_osd *osd; 1381 1382 if (wrlocked) 1383 verify_osdc_wrlocked(osdc); 1384 else 1385 verify_osdc_locked(osdc); 1386 1387 if (o != CEPH_HOMELESS_OSD) 1388 osd = lookup_osd(&osdc->osds, o); 1389 else 1390 osd = &osdc->homeless_osd; 1391 if (!osd) { 1392 if (!wrlocked) 1393 return ERR_PTR(-EAGAIN); 1394 1395 osd = create_osd(osdc, o); 1396 insert_osd(&osdc->osds, osd); 1397 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1398 &osdc->osdmap->osd_addr[osd->o_osd]); 1399 } 1400 1401 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1402 return osd; 1403 } 1404 1405 /* 1406 * Create request <-> OSD session relation. 1407 * 1408 * @req has to be assigned a tid, @osd may be homeless. 1409 */ 1410 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1411 { 1412 verify_osd_locked(osd); 1413 WARN_ON(!req->r_tid || req->r_osd); 1414 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1415 req, req->r_tid); 1416 1417 if (!osd_homeless(osd)) 1418 __remove_osd_from_lru(osd); 1419 else 1420 atomic_inc(&osd->o_osdc->num_homeless); 1421 1422 get_osd(osd); 1423 spin_lock(&osd->o_requests_lock); 1424 insert_request(&osd->o_requests, req); 1425 spin_unlock(&osd->o_requests_lock); 1426 req->r_osd = osd; 1427 } 1428 1429 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1430 { 1431 verify_osd_locked(osd); 1432 WARN_ON(req->r_osd != osd); 1433 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1434 req, req->r_tid); 1435 1436 req->r_osd = NULL; 1437 spin_lock(&osd->o_requests_lock); 1438 erase_request(&osd->o_requests, req); 1439 spin_unlock(&osd->o_requests_lock); 1440 put_osd(osd); 1441 1442 if (!osd_homeless(osd)) 1443 maybe_move_osd_to_lru(osd); 1444 else 1445 atomic_dec(&osd->o_osdc->num_homeless); 1446 } 1447 1448 static bool __pool_full(struct ceph_pg_pool_info *pi) 1449 { 1450 return pi->flags & CEPH_POOL_FLAG_FULL; 1451 } 1452 1453 static bool have_pool_full(struct ceph_osd_client *osdc) 1454 { 1455 struct rb_node *n; 1456 1457 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1458 struct ceph_pg_pool_info *pi = 1459 rb_entry(n, struct ceph_pg_pool_info, node); 1460 1461 if (__pool_full(pi)) 1462 return true; 1463 } 1464 1465 return false; 1466 } 1467 1468 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1469 { 1470 struct ceph_pg_pool_info *pi; 1471 1472 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1473 if (!pi) 1474 return false; 1475 1476 return __pool_full(pi); 1477 } 1478 1479 /* 1480 * Returns whether a request should be blocked from being sent 1481 * based on the current osdmap and osd_client settings. 1482 */ 1483 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1484 const struct ceph_osd_request_target *t, 1485 struct ceph_pg_pool_info *pi) 1486 { 1487 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1488 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1489 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1490 __pool_full(pi); 1491 1492 WARN_ON(pi->id != t->target_oloc.pool); 1493 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) || 1494 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) || 1495 (osdc->osdmap->epoch < osdc->epoch_barrier); 1496 } 1497 1498 static int pick_random_replica(const struct ceph_osds *acting) 1499 { 1500 int i = get_random_u32_below(acting->size); 1501 1502 dout("%s picked osd%d, primary osd%d\n", __func__, 1503 acting->osds[i], acting->primary); 1504 return i; 1505 } 1506 1507 /* 1508 * Picks the closest replica based on client's location given by 1509 * crush_location option. Prefers the primary if the locality is 1510 * the same. 1511 */ 1512 static int pick_closest_replica(struct ceph_osd_client *osdc, 1513 const struct ceph_osds *acting) 1514 { 1515 struct ceph_options *opt = osdc->client->options; 1516 int best_i, best_locality; 1517 int i = 0, locality; 1518 1519 do { 1520 locality = ceph_get_crush_locality(osdc->osdmap, 1521 acting->osds[i], 1522 &opt->crush_locs); 1523 if (i == 0 || 1524 (locality >= 0 && best_locality < 0) || 1525 (locality >= 0 && best_locality >= 0 && 1526 locality < best_locality)) { 1527 best_i = i; 1528 best_locality = locality; 1529 } 1530 } while (++i < acting->size); 1531 1532 dout("%s picked osd%d with locality %d, primary osd%d\n", __func__, 1533 acting->osds[best_i], best_locality, acting->primary); 1534 return best_i; 1535 } 1536 1537 enum calc_target_result { 1538 CALC_TARGET_NO_ACTION = 0, 1539 CALC_TARGET_NEED_RESEND, 1540 CALC_TARGET_POOL_DNE, 1541 }; 1542 1543 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1544 struct ceph_osd_request_target *t, 1545 bool any_change) 1546 { 1547 struct ceph_pg_pool_info *pi; 1548 struct ceph_pg pgid, last_pgid; 1549 struct ceph_osds up, acting; 1550 bool is_read = t->flags & CEPH_OSD_FLAG_READ; 1551 bool is_write = t->flags & CEPH_OSD_FLAG_WRITE; 1552 bool force_resend = false; 1553 bool unpaused = false; 1554 bool legacy_change = false; 1555 bool split = false; 1556 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1557 bool recovery_deletes = ceph_osdmap_flag(osdc, 1558 CEPH_OSDMAP_RECOVERY_DELETES); 1559 enum calc_target_result ct_res; 1560 1561 t->epoch = osdc->osdmap->epoch; 1562 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1563 if (!pi) { 1564 t->osd = CEPH_HOMELESS_OSD; 1565 ct_res = CALC_TARGET_POOL_DNE; 1566 goto out; 1567 } 1568 1569 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1570 if (t->last_force_resend < pi->last_force_request_resend) { 1571 t->last_force_resend = pi->last_force_request_resend; 1572 force_resend = true; 1573 } else if (t->last_force_resend == 0) { 1574 force_resend = true; 1575 } 1576 } 1577 1578 /* apply tiering */ 1579 ceph_oid_copy(&t->target_oid, &t->base_oid); 1580 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1581 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1582 if (is_read && pi->read_tier >= 0) 1583 t->target_oloc.pool = pi->read_tier; 1584 if (is_write && pi->write_tier >= 0) 1585 t->target_oloc.pool = pi->write_tier; 1586 1587 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool); 1588 if (!pi) { 1589 t->osd = CEPH_HOMELESS_OSD; 1590 ct_res = CALC_TARGET_POOL_DNE; 1591 goto out; 1592 } 1593 } 1594 1595 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid); 1596 last_pgid.pool = pgid.pool; 1597 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1598 1599 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting); 1600 if (any_change && 1601 ceph_is_new_interval(&t->acting, 1602 &acting, 1603 &t->up, 1604 &up, 1605 t->size, 1606 pi->size, 1607 t->min_size, 1608 pi->min_size, 1609 t->pg_num, 1610 pi->pg_num, 1611 t->sort_bitwise, 1612 sort_bitwise, 1613 t->recovery_deletes, 1614 recovery_deletes, 1615 &last_pgid)) 1616 force_resend = true; 1617 1618 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1619 t->paused = false; 1620 unpaused = true; 1621 } 1622 legacy_change = ceph_pg_compare(&t->pgid, &pgid) || 1623 ceph_osds_changed(&t->acting, &acting, 1624 t->used_replica || any_change); 1625 if (t->pg_num) 1626 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num); 1627 1628 if (legacy_change || force_resend || split) { 1629 t->pgid = pgid; /* struct */ 1630 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid); 1631 ceph_osds_copy(&t->acting, &acting); 1632 ceph_osds_copy(&t->up, &up); 1633 t->size = pi->size; 1634 t->min_size = pi->min_size; 1635 t->pg_num = pi->pg_num; 1636 t->pg_num_mask = pi->pg_num_mask; 1637 t->sort_bitwise = sort_bitwise; 1638 t->recovery_deletes = recovery_deletes; 1639 1640 if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS | 1641 CEPH_OSD_FLAG_LOCALIZE_READS)) && 1642 !is_write && pi->type == CEPH_POOL_TYPE_REP && 1643 acting.size > 1) { 1644 int pos; 1645 1646 WARN_ON(!is_read || acting.osds[0] != acting.primary); 1647 if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) { 1648 pos = pick_random_replica(&acting); 1649 } else { 1650 pos = pick_closest_replica(osdc, &acting); 1651 } 1652 t->osd = acting.osds[pos]; 1653 t->used_replica = pos > 0; 1654 } else { 1655 t->osd = acting.primary; 1656 t->used_replica = false; 1657 } 1658 } 1659 1660 if (unpaused || legacy_change || force_resend || split) 1661 ct_res = CALC_TARGET_NEED_RESEND; 1662 else 1663 ct_res = CALC_TARGET_NO_ACTION; 1664 1665 out: 1666 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused, 1667 legacy_change, force_resend, split, ct_res, t->osd); 1668 return ct_res; 1669 } 1670 1671 static struct ceph_spg_mapping *alloc_spg_mapping(void) 1672 { 1673 struct ceph_spg_mapping *spg; 1674 1675 spg = kmalloc(sizeof(*spg), GFP_NOIO); 1676 if (!spg) 1677 return NULL; 1678 1679 RB_CLEAR_NODE(&spg->node); 1680 spg->backoffs = RB_ROOT; 1681 return spg; 1682 } 1683 1684 static void free_spg_mapping(struct ceph_spg_mapping *spg) 1685 { 1686 WARN_ON(!RB_EMPTY_NODE(&spg->node)); 1687 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs)); 1688 1689 kfree(spg); 1690 } 1691 1692 /* 1693 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to 1694 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is 1695 * defined only within a specific spgid; it does not pass anything to 1696 * children on split, or to another primary. 1697 */ 1698 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare, 1699 RB_BYPTR, const struct ceph_spg *, node) 1700 1701 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid) 1702 { 1703 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits; 1704 } 1705 1706 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid, 1707 void **pkey, size_t *pkey_len) 1708 { 1709 if (hoid->key_len) { 1710 *pkey = hoid->key; 1711 *pkey_len = hoid->key_len; 1712 } else { 1713 *pkey = hoid->oid; 1714 *pkey_len = hoid->oid_len; 1715 } 1716 } 1717 1718 static int compare_names(const void *name1, size_t name1_len, 1719 const void *name2, size_t name2_len) 1720 { 1721 int ret; 1722 1723 ret = memcmp(name1, name2, min(name1_len, name2_len)); 1724 if (!ret) { 1725 if (name1_len < name2_len) 1726 ret = -1; 1727 else if (name1_len > name2_len) 1728 ret = 1; 1729 } 1730 return ret; 1731 } 1732 1733 static int hoid_compare(const struct ceph_hobject_id *lhs, 1734 const struct ceph_hobject_id *rhs) 1735 { 1736 void *effective_key1, *effective_key2; 1737 size_t effective_key1_len, effective_key2_len; 1738 int ret; 1739 1740 if (lhs->is_max < rhs->is_max) 1741 return -1; 1742 if (lhs->is_max > rhs->is_max) 1743 return 1; 1744 1745 if (lhs->pool < rhs->pool) 1746 return -1; 1747 if (lhs->pool > rhs->pool) 1748 return 1; 1749 1750 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs)) 1751 return -1; 1752 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs)) 1753 return 1; 1754 1755 ret = compare_names(lhs->nspace, lhs->nspace_len, 1756 rhs->nspace, rhs->nspace_len); 1757 if (ret) 1758 return ret; 1759 1760 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len); 1761 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len); 1762 ret = compare_names(effective_key1, effective_key1_len, 1763 effective_key2, effective_key2_len); 1764 if (ret) 1765 return ret; 1766 1767 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len); 1768 if (ret) 1769 return ret; 1770 1771 if (lhs->snapid < rhs->snapid) 1772 return -1; 1773 if (lhs->snapid > rhs->snapid) 1774 return 1; 1775 1776 return 0; 1777 } 1778 1779 /* 1780 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX 1781 * compat stuff here. 1782 * 1783 * Assumes @hoid is zero-initialized. 1784 */ 1785 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid) 1786 { 1787 u8 struct_v; 1788 u32 struct_len; 1789 int ret; 1790 1791 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v, 1792 &struct_len); 1793 if (ret) 1794 return ret; 1795 1796 if (struct_v < 4) { 1797 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v); 1798 goto e_inval; 1799 } 1800 1801 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len, 1802 GFP_NOIO); 1803 if (IS_ERR(hoid->key)) { 1804 ret = PTR_ERR(hoid->key); 1805 hoid->key = NULL; 1806 return ret; 1807 } 1808 1809 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len, 1810 GFP_NOIO); 1811 if (IS_ERR(hoid->oid)) { 1812 ret = PTR_ERR(hoid->oid); 1813 hoid->oid = NULL; 1814 return ret; 1815 } 1816 1817 ceph_decode_64_safe(p, end, hoid->snapid, e_inval); 1818 ceph_decode_32_safe(p, end, hoid->hash, e_inval); 1819 ceph_decode_8_safe(p, end, hoid->is_max, e_inval); 1820 1821 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len, 1822 GFP_NOIO); 1823 if (IS_ERR(hoid->nspace)) { 1824 ret = PTR_ERR(hoid->nspace); 1825 hoid->nspace = NULL; 1826 return ret; 1827 } 1828 1829 ceph_decode_64_safe(p, end, hoid->pool, e_inval); 1830 1831 ceph_hoid_build_hash_cache(hoid); 1832 return 0; 1833 1834 e_inval: 1835 return -EINVAL; 1836 } 1837 1838 static int hoid_encoding_size(const struct ceph_hobject_id *hoid) 1839 { 1840 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */ 1841 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len; 1842 } 1843 1844 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid) 1845 { 1846 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid)); 1847 ceph_encode_string(p, end, hoid->key, hoid->key_len); 1848 ceph_encode_string(p, end, hoid->oid, hoid->oid_len); 1849 ceph_encode_64(p, hoid->snapid); 1850 ceph_encode_32(p, hoid->hash); 1851 ceph_encode_8(p, hoid->is_max); 1852 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len); 1853 ceph_encode_64(p, hoid->pool); 1854 } 1855 1856 static void free_hoid(struct ceph_hobject_id *hoid) 1857 { 1858 if (hoid) { 1859 kfree(hoid->key); 1860 kfree(hoid->oid); 1861 kfree(hoid->nspace); 1862 kfree(hoid); 1863 } 1864 } 1865 1866 static struct ceph_osd_backoff *alloc_backoff(void) 1867 { 1868 struct ceph_osd_backoff *backoff; 1869 1870 backoff = kzalloc(sizeof(*backoff), GFP_NOIO); 1871 if (!backoff) 1872 return NULL; 1873 1874 RB_CLEAR_NODE(&backoff->spg_node); 1875 RB_CLEAR_NODE(&backoff->id_node); 1876 return backoff; 1877 } 1878 1879 static void free_backoff(struct ceph_osd_backoff *backoff) 1880 { 1881 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node)); 1882 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node)); 1883 1884 free_hoid(backoff->begin); 1885 free_hoid(backoff->end); 1886 kfree(backoff); 1887 } 1888 1889 /* 1890 * Within a specific spgid, backoffs are managed by ->begin hoid. 1891 */ 1892 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare, 1893 RB_BYVAL, spg_node); 1894 1895 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root, 1896 const struct ceph_hobject_id *hoid) 1897 { 1898 struct rb_node *n = root->rb_node; 1899 1900 while (n) { 1901 struct ceph_osd_backoff *cur = 1902 rb_entry(n, struct ceph_osd_backoff, spg_node); 1903 int cmp; 1904 1905 cmp = hoid_compare(hoid, cur->begin); 1906 if (cmp < 0) { 1907 n = n->rb_left; 1908 } else if (cmp > 0) { 1909 if (hoid_compare(hoid, cur->end) < 0) 1910 return cur; 1911 1912 n = n->rb_right; 1913 } else { 1914 return cur; 1915 } 1916 } 1917 1918 return NULL; 1919 } 1920 1921 /* 1922 * Each backoff has a unique id within its OSD session. 1923 */ 1924 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node) 1925 1926 static void clear_backoffs(struct ceph_osd *osd) 1927 { 1928 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) { 1929 struct ceph_spg_mapping *spg = 1930 rb_entry(rb_first(&osd->o_backoff_mappings), 1931 struct ceph_spg_mapping, node); 1932 1933 while (!RB_EMPTY_ROOT(&spg->backoffs)) { 1934 struct ceph_osd_backoff *backoff = 1935 rb_entry(rb_first(&spg->backoffs), 1936 struct ceph_osd_backoff, spg_node); 1937 1938 erase_backoff(&spg->backoffs, backoff); 1939 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 1940 free_backoff(backoff); 1941 } 1942 erase_spg_mapping(&osd->o_backoff_mappings, spg); 1943 free_spg_mapping(spg); 1944 } 1945 } 1946 1947 /* 1948 * Set up a temporary, non-owning view into @t. 1949 */ 1950 static void hoid_fill_from_target(struct ceph_hobject_id *hoid, 1951 const struct ceph_osd_request_target *t) 1952 { 1953 hoid->key = NULL; 1954 hoid->key_len = 0; 1955 hoid->oid = t->target_oid.name; 1956 hoid->oid_len = t->target_oid.name_len; 1957 hoid->snapid = CEPH_NOSNAP; 1958 hoid->hash = t->pgid.seed; 1959 hoid->is_max = false; 1960 if (t->target_oloc.pool_ns) { 1961 hoid->nspace = t->target_oloc.pool_ns->str; 1962 hoid->nspace_len = t->target_oloc.pool_ns->len; 1963 } else { 1964 hoid->nspace = NULL; 1965 hoid->nspace_len = 0; 1966 } 1967 hoid->pool = t->target_oloc.pool; 1968 ceph_hoid_build_hash_cache(hoid); 1969 } 1970 1971 static bool should_plug_request(struct ceph_osd_request *req) 1972 { 1973 struct ceph_osd *osd = req->r_osd; 1974 struct ceph_spg_mapping *spg; 1975 struct ceph_osd_backoff *backoff; 1976 struct ceph_hobject_id hoid; 1977 1978 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid); 1979 if (!spg) 1980 return false; 1981 1982 hoid_fill_from_target(&hoid, &req->r_t); 1983 backoff = lookup_containing_backoff(&spg->backoffs, &hoid); 1984 if (!backoff) 1985 return false; 1986 1987 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n", 1988 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool, 1989 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id); 1990 return true; 1991 } 1992 1993 /* 1994 * Keep get_num_data_items() in sync with this function. 1995 */ 1996 static void setup_request_data(struct ceph_osd_request *req) 1997 { 1998 struct ceph_msg *request_msg = req->r_request; 1999 struct ceph_msg *reply_msg = req->r_reply; 2000 struct ceph_osd_req_op *op; 2001 2002 if (req->r_request->num_data_items || req->r_reply->num_data_items) 2003 return; 2004 2005 WARN_ON(request_msg->data_length || reply_msg->data_length); 2006 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { 2007 switch (op->op) { 2008 /* request */ 2009 case CEPH_OSD_OP_WRITE: 2010 case CEPH_OSD_OP_WRITEFULL: 2011 WARN_ON(op->indata_len != op->extent.length); 2012 ceph_osdc_msg_data_add(request_msg, 2013 &op->extent.osd_data); 2014 break; 2015 case CEPH_OSD_OP_SETXATTR: 2016 case CEPH_OSD_OP_CMPXATTR: 2017 WARN_ON(op->indata_len != op->xattr.name_len + 2018 op->xattr.value_len); 2019 ceph_osdc_msg_data_add(request_msg, 2020 &op->xattr.osd_data); 2021 break; 2022 case CEPH_OSD_OP_NOTIFY_ACK: 2023 ceph_osdc_msg_data_add(request_msg, 2024 &op->notify_ack.request_data); 2025 break; 2026 case CEPH_OSD_OP_COPY_FROM2: 2027 ceph_osdc_msg_data_add(request_msg, 2028 &op->copy_from.osd_data); 2029 break; 2030 2031 /* reply */ 2032 case CEPH_OSD_OP_STAT: 2033 ceph_osdc_msg_data_add(reply_msg, 2034 &op->raw_data_in); 2035 break; 2036 case CEPH_OSD_OP_READ: 2037 ceph_osdc_msg_data_add(reply_msg, 2038 &op->extent.osd_data); 2039 break; 2040 case CEPH_OSD_OP_LIST_WATCHERS: 2041 ceph_osdc_msg_data_add(reply_msg, 2042 &op->list_watchers.response_data); 2043 break; 2044 2045 /* both */ 2046 case CEPH_OSD_OP_CALL: 2047 WARN_ON(op->indata_len != op->cls.class_len + 2048 op->cls.method_len + 2049 op->cls.indata_len); 2050 ceph_osdc_msg_data_add(request_msg, 2051 &op->cls.request_info); 2052 /* optional, can be NONE */ 2053 ceph_osdc_msg_data_add(request_msg, 2054 &op->cls.request_data); 2055 /* optional, can be NONE */ 2056 ceph_osdc_msg_data_add(reply_msg, 2057 &op->cls.response_data); 2058 break; 2059 case CEPH_OSD_OP_NOTIFY: 2060 ceph_osdc_msg_data_add(request_msg, 2061 &op->notify.request_data); 2062 ceph_osdc_msg_data_add(reply_msg, 2063 &op->notify.response_data); 2064 break; 2065 } 2066 } 2067 } 2068 2069 static void encode_pgid(void **p, const struct ceph_pg *pgid) 2070 { 2071 ceph_encode_8(p, 1); 2072 ceph_encode_64(p, pgid->pool); 2073 ceph_encode_32(p, pgid->seed); 2074 ceph_encode_32(p, -1); /* preferred */ 2075 } 2076 2077 static void encode_spgid(void **p, const struct ceph_spg *spgid) 2078 { 2079 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1); 2080 encode_pgid(p, &spgid->pgid); 2081 ceph_encode_8(p, spgid->shard); 2082 } 2083 2084 static void encode_oloc(void **p, void *end, 2085 const struct ceph_object_locator *oloc) 2086 { 2087 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc)); 2088 ceph_encode_64(p, oloc->pool); 2089 ceph_encode_32(p, -1); /* preferred */ 2090 ceph_encode_32(p, 0); /* key len */ 2091 if (oloc->pool_ns) 2092 ceph_encode_string(p, end, oloc->pool_ns->str, 2093 oloc->pool_ns->len); 2094 else 2095 ceph_encode_32(p, 0); 2096 } 2097 2098 static void encode_request_partial(struct ceph_osd_request *req, 2099 struct ceph_msg *msg) 2100 { 2101 void *p = msg->front.iov_base; 2102 void *const end = p + msg->front_alloc_len; 2103 u32 data_len = 0; 2104 int i; 2105 2106 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 2107 /* snapshots aren't writeable */ 2108 WARN_ON(req->r_snapid != CEPH_NOSNAP); 2109 } else { 2110 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 2111 req->r_data_offset || req->r_snapc); 2112 } 2113 2114 setup_request_data(req); 2115 2116 encode_spgid(&p, &req->r_t.spgid); /* actual spg */ 2117 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */ 2118 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 2119 ceph_encode_32(&p, req->r_flags); 2120 2121 /* reqid */ 2122 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid)); 2123 memset(p, 0, sizeof(struct ceph_osd_reqid)); 2124 p += sizeof(struct ceph_osd_reqid); 2125 2126 /* trace */ 2127 memset(p, 0, sizeof(struct ceph_blkin_trace_info)); 2128 p += sizeof(struct ceph_blkin_trace_info); 2129 2130 ceph_encode_32(&p, 0); /* client_inc, always 0 */ 2131 ceph_encode_timespec64(p, &req->r_mtime); 2132 p += sizeof(struct ceph_timespec); 2133 2134 encode_oloc(&p, end, &req->r_t.target_oloc); 2135 ceph_encode_string(&p, end, req->r_t.target_oid.name, 2136 req->r_t.target_oid.name_len); 2137 2138 /* ops, can imply data */ 2139 ceph_encode_16(&p, req->r_num_ops); 2140 for (i = 0; i < req->r_num_ops; i++) { 2141 data_len += osd_req_encode_op(p, &req->r_ops[i]); 2142 p += sizeof(struct ceph_osd_op); 2143 } 2144 2145 ceph_encode_64(&p, req->r_snapid); /* snapid */ 2146 if (req->r_snapc) { 2147 ceph_encode_64(&p, req->r_snapc->seq); 2148 ceph_encode_32(&p, req->r_snapc->num_snaps); 2149 for (i = 0; i < req->r_snapc->num_snaps; i++) 2150 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2151 } else { 2152 ceph_encode_64(&p, 0); /* snap_seq */ 2153 ceph_encode_32(&p, 0); /* snaps len */ 2154 } 2155 2156 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 2157 BUG_ON(p > end - 8); /* space for features */ 2158 2159 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */ 2160 /* front_len is finalized in encode_request_finish() */ 2161 msg->front.iov_len = p - msg->front.iov_base; 2162 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2163 msg->hdr.data_len = cpu_to_le32(data_len); 2164 /* 2165 * The header "data_off" is a hint to the receiver allowing it 2166 * to align received data into its buffers such that there's no 2167 * need to re-copy it before writing it to disk (direct I/O). 2168 */ 2169 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 2170 2171 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg, 2172 req->r_t.target_oid.name, req->r_t.target_oid.name_len); 2173 } 2174 2175 static void encode_request_finish(struct ceph_msg *msg) 2176 { 2177 void *p = msg->front.iov_base; 2178 void *const partial_end = p + msg->front.iov_len; 2179 void *const end = p + msg->front_alloc_len; 2180 2181 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) { 2182 /* luminous OSD -- encode features and be done */ 2183 p = partial_end; 2184 ceph_encode_64(&p, msg->con->peer_features); 2185 } else { 2186 struct { 2187 char spgid[CEPH_ENCODING_START_BLK_LEN + 2188 CEPH_PGID_ENCODING_LEN + 1]; 2189 __le32 hash; 2190 __le32 epoch; 2191 __le32 flags; 2192 char reqid[CEPH_ENCODING_START_BLK_LEN + 2193 sizeof(struct ceph_osd_reqid)]; 2194 char trace[sizeof(struct ceph_blkin_trace_info)]; 2195 __le32 client_inc; 2196 struct ceph_timespec mtime; 2197 } __packed head; 2198 struct ceph_pg pgid; 2199 void *oloc, *oid, *tail; 2200 int oloc_len, oid_len, tail_len; 2201 int len; 2202 2203 /* 2204 * Pre-luminous OSD -- reencode v8 into v4 using @head 2205 * as a temporary buffer. Encode the raw PG; the rest 2206 * is just a matter of moving oloc, oid and tail blobs 2207 * around. 2208 */ 2209 memcpy(&head, p, sizeof(head)); 2210 p += sizeof(head); 2211 2212 oloc = p; 2213 p += CEPH_ENCODING_START_BLK_LEN; 2214 pgid.pool = ceph_decode_64(&p); 2215 p += 4 + 4; /* preferred, key len */ 2216 len = ceph_decode_32(&p); 2217 p += len; /* nspace */ 2218 oloc_len = p - oloc; 2219 2220 oid = p; 2221 len = ceph_decode_32(&p); 2222 p += len; 2223 oid_len = p - oid; 2224 2225 tail = p; 2226 tail_len = partial_end - p; 2227 2228 p = msg->front.iov_base; 2229 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc)); 2230 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch)); 2231 ceph_encode_copy(&p, &head.flags, sizeof(head.flags)); 2232 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime)); 2233 2234 /* reassert_version */ 2235 memset(p, 0, sizeof(struct ceph_eversion)); 2236 p += sizeof(struct ceph_eversion); 2237 2238 BUG_ON(p >= oloc); 2239 memmove(p, oloc, oloc_len); 2240 p += oloc_len; 2241 2242 pgid.seed = le32_to_cpu(head.hash); 2243 encode_pgid(&p, &pgid); /* raw pg */ 2244 2245 BUG_ON(p >= oid); 2246 memmove(p, oid, oid_len); 2247 p += oid_len; 2248 2249 /* tail -- ops, snapid, snapc, retry_attempt */ 2250 BUG_ON(p >= tail); 2251 memmove(p, tail, tail_len); 2252 p += tail_len; 2253 2254 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 2255 } 2256 2257 BUG_ON(p > end); 2258 msg->front.iov_len = p - msg->front.iov_base; 2259 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2260 2261 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg, 2262 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len), 2263 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len), 2264 le16_to_cpu(msg->hdr.version)); 2265 } 2266 2267 /* 2268 * @req has to be assigned a tid and registered. 2269 */ 2270 static void send_request(struct ceph_osd_request *req) 2271 { 2272 struct ceph_osd *osd = req->r_osd; 2273 2274 verify_osd_locked(osd); 2275 WARN_ON(osd->o_osd != req->r_t.osd); 2276 2277 /* backoff? */ 2278 if (should_plug_request(req)) 2279 return; 2280 2281 /* 2282 * We may have a previously queued request message hanging 2283 * around. Cancel it to avoid corrupting the msgr. 2284 */ 2285 if (req->r_sent) 2286 ceph_msg_revoke(req->r_request); 2287 2288 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 2289 if (req->r_attempts) 2290 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2291 else 2292 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 2293 2294 encode_request_partial(req, req->r_request); 2295 2296 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n", 2297 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 2298 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed, 2299 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags, 2300 req->r_attempts); 2301 2302 req->r_t.paused = false; 2303 req->r_stamp = jiffies; 2304 req->r_attempts++; 2305 2306 req->r_sent = osd->o_incarnation; 2307 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 2308 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 2309 } 2310 2311 static void maybe_request_map(struct ceph_osd_client *osdc) 2312 { 2313 bool continuous = false; 2314 2315 verify_osdc_locked(osdc); 2316 WARN_ON(!osdc->osdmap->epoch); 2317 2318 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2319 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 2320 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2321 dout("%s osdc %p continuous\n", __func__, osdc); 2322 continuous = true; 2323 } else { 2324 dout("%s osdc %p onetime\n", __func__, osdc); 2325 } 2326 2327 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 2328 osdc->osdmap->epoch + 1, continuous)) 2329 ceph_monc_renew_subs(&osdc->client->monc); 2330 } 2331 2332 static void complete_request(struct ceph_osd_request *req, int err); 2333 static void send_map_check(struct ceph_osd_request *req); 2334 2335 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 2336 { 2337 struct ceph_osd_client *osdc = req->r_osdc; 2338 struct ceph_osd *osd; 2339 enum calc_target_result ct_res; 2340 int err = 0; 2341 bool need_send = false; 2342 bool promoted = false; 2343 2344 WARN_ON(req->r_tid); 2345 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 2346 2347 again: 2348 ct_res = calc_target(osdc, &req->r_t, false); 2349 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 2350 goto promote; 2351 2352 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 2353 if (IS_ERR(osd)) { 2354 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 2355 goto promote; 2356 } 2357 2358 if (osdc->abort_err) { 2359 dout("req %p abort_err %d\n", req, osdc->abort_err); 2360 err = osdc->abort_err; 2361 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) { 2362 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch, 2363 osdc->epoch_barrier); 2364 req->r_t.paused = true; 2365 maybe_request_map(osdc); 2366 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2367 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2368 dout("req %p pausewr\n", req); 2369 req->r_t.paused = true; 2370 maybe_request_map(osdc); 2371 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 2372 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2373 dout("req %p pauserd\n", req); 2374 req->r_t.paused = true; 2375 maybe_request_map(osdc); 2376 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2377 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 2378 CEPH_OSD_FLAG_FULL_FORCE)) && 2379 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2380 pool_full(osdc, req->r_t.base_oloc.pool))) { 2381 dout("req %p full/pool_full\n", req); 2382 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) { 2383 err = -ENOSPC; 2384 } else { 2385 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL)) 2386 pr_warn_ratelimited("cluster is full (osdmap FULL)\n"); 2387 else 2388 pr_warn_ratelimited("pool %lld is full or reached quota\n", 2389 req->r_t.base_oloc.pool); 2390 req->r_t.paused = true; 2391 maybe_request_map(osdc); 2392 } 2393 } else if (!osd_homeless(osd)) { 2394 need_send = true; 2395 } else { 2396 maybe_request_map(osdc); 2397 } 2398 2399 mutex_lock(&osd->lock); 2400 /* 2401 * Assign the tid atomically with send_request() to protect 2402 * multiple writes to the same object from racing with each 2403 * other, resulting in out of order ops on the OSDs. 2404 */ 2405 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2406 link_request(osd, req); 2407 if (need_send) 2408 send_request(req); 2409 else if (err) 2410 complete_request(req, err); 2411 mutex_unlock(&osd->lock); 2412 2413 if (!err && ct_res == CALC_TARGET_POOL_DNE) 2414 send_map_check(req); 2415 2416 if (promoted) 2417 downgrade_write(&osdc->lock); 2418 return; 2419 2420 promote: 2421 up_read(&osdc->lock); 2422 down_write(&osdc->lock); 2423 wrlocked = true; 2424 promoted = true; 2425 goto again; 2426 } 2427 2428 static void account_request(struct ceph_osd_request *req) 2429 { 2430 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK)); 2431 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE))); 2432 2433 req->r_flags |= CEPH_OSD_FLAG_ONDISK; 2434 atomic_inc(&req->r_osdc->num_requests); 2435 2436 req->r_start_stamp = jiffies; 2437 req->r_start_latency = ktime_get(); 2438 } 2439 2440 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 2441 { 2442 ceph_osdc_get_request(req); 2443 account_request(req); 2444 __submit_request(req, wrlocked); 2445 } 2446 2447 static void finish_request(struct ceph_osd_request *req) 2448 { 2449 struct ceph_osd_client *osdc = req->r_osdc; 2450 2451 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 2452 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2453 2454 req->r_end_latency = ktime_get(); 2455 2456 if (req->r_osd) 2457 unlink_request(req->r_osd, req); 2458 atomic_dec(&osdc->num_requests); 2459 2460 /* 2461 * If an OSD has failed or returned and a request has been sent 2462 * twice, it's possible to get a reply and end up here while the 2463 * request message is queued for delivery. We will ignore the 2464 * reply, so not a big deal, but better to try and catch it. 2465 */ 2466 ceph_msg_revoke(req->r_request); 2467 ceph_msg_revoke_incoming(req->r_reply); 2468 } 2469 2470 static void __complete_request(struct ceph_osd_request *req) 2471 { 2472 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req, 2473 req->r_tid, req->r_callback, req->r_result); 2474 2475 if (req->r_callback) 2476 req->r_callback(req); 2477 complete_all(&req->r_completion); 2478 ceph_osdc_put_request(req); 2479 } 2480 2481 static void complete_request_workfn(struct work_struct *work) 2482 { 2483 struct ceph_osd_request *req = 2484 container_of(work, struct ceph_osd_request, r_complete_work); 2485 2486 __complete_request(req); 2487 } 2488 2489 /* 2490 * This is open-coded in handle_reply(). 2491 */ 2492 static void complete_request(struct ceph_osd_request *req, int err) 2493 { 2494 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2495 2496 req->r_result = err; 2497 finish_request(req); 2498 2499 INIT_WORK(&req->r_complete_work, complete_request_workfn); 2500 queue_work(req->r_osdc->completion_wq, &req->r_complete_work); 2501 } 2502 2503 static void cancel_map_check(struct ceph_osd_request *req) 2504 { 2505 struct ceph_osd_client *osdc = req->r_osdc; 2506 struct ceph_osd_request *lookup_req; 2507 2508 verify_osdc_wrlocked(osdc); 2509 2510 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2511 if (!lookup_req) 2512 return; 2513 2514 WARN_ON(lookup_req != req); 2515 erase_request_mc(&osdc->map_checks, req); 2516 ceph_osdc_put_request(req); 2517 } 2518 2519 static void cancel_request(struct ceph_osd_request *req) 2520 { 2521 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2522 2523 cancel_map_check(req); 2524 finish_request(req); 2525 complete_all(&req->r_completion); 2526 ceph_osdc_put_request(req); 2527 } 2528 2529 static void abort_request(struct ceph_osd_request *req, int err) 2530 { 2531 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2532 2533 cancel_map_check(req); 2534 complete_request(req, err); 2535 } 2536 2537 static int abort_fn(struct ceph_osd_request *req, void *arg) 2538 { 2539 int err = *(int *)arg; 2540 2541 abort_request(req, err); 2542 return 0; /* continue iteration */ 2543 } 2544 2545 /* 2546 * Abort all in-flight requests with @err and arrange for all future 2547 * requests to be failed immediately. 2548 */ 2549 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err) 2550 { 2551 dout("%s osdc %p err %d\n", __func__, osdc, err); 2552 down_write(&osdc->lock); 2553 for_each_request(osdc, abort_fn, &err); 2554 osdc->abort_err = err; 2555 up_write(&osdc->lock); 2556 } 2557 EXPORT_SYMBOL(ceph_osdc_abort_requests); 2558 2559 void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc) 2560 { 2561 down_write(&osdc->lock); 2562 osdc->abort_err = 0; 2563 up_write(&osdc->lock); 2564 } 2565 EXPORT_SYMBOL(ceph_osdc_clear_abort_err); 2566 2567 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2568 { 2569 if (likely(eb > osdc->epoch_barrier)) { 2570 dout("updating epoch_barrier from %u to %u\n", 2571 osdc->epoch_barrier, eb); 2572 osdc->epoch_barrier = eb; 2573 /* Request map if we're not to the barrier yet */ 2574 if (eb > osdc->osdmap->epoch) 2575 maybe_request_map(osdc); 2576 } 2577 } 2578 2579 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2580 { 2581 down_read(&osdc->lock); 2582 if (unlikely(eb > osdc->epoch_barrier)) { 2583 up_read(&osdc->lock); 2584 down_write(&osdc->lock); 2585 update_epoch_barrier(osdc, eb); 2586 up_write(&osdc->lock); 2587 } else { 2588 up_read(&osdc->lock); 2589 } 2590 } 2591 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier); 2592 2593 /* 2594 * We can end up releasing caps as a result of abort_request(). 2595 * In that case, we probably want to ensure that the cap release message 2596 * has an updated epoch barrier in it, so set the epoch barrier prior to 2597 * aborting the first request. 2598 */ 2599 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg) 2600 { 2601 struct ceph_osd_client *osdc = req->r_osdc; 2602 bool *victims = arg; 2603 2604 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2605 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2606 pool_full(osdc, req->r_t.base_oloc.pool))) { 2607 if (!*victims) { 2608 update_epoch_barrier(osdc, osdc->osdmap->epoch); 2609 *victims = true; 2610 } 2611 abort_request(req, -ENOSPC); 2612 } 2613 2614 return 0; /* continue iteration */ 2615 } 2616 2617 /* 2618 * Drop all pending requests that are stalled waiting on a full condition to 2619 * clear, and complete them with ENOSPC as the return code. Set the 2620 * osdc->epoch_barrier to the latest map epoch that we've seen if any were 2621 * cancelled. 2622 */ 2623 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc) 2624 { 2625 bool victims = false; 2626 2627 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) && 2628 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc))) 2629 for_each_request(osdc, abort_on_full_fn, &victims); 2630 } 2631 2632 static void check_pool_dne(struct ceph_osd_request *req) 2633 { 2634 struct ceph_osd_client *osdc = req->r_osdc; 2635 struct ceph_osdmap *map = osdc->osdmap; 2636 2637 verify_osdc_wrlocked(osdc); 2638 WARN_ON(!map->epoch); 2639 2640 if (req->r_attempts) { 2641 /* 2642 * We sent a request earlier, which means that 2643 * previously the pool existed, and now it does not 2644 * (i.e., it was deleted). 2645 */ 2646 req->r_map_dne_bound = map->epoch; 2647 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 2648 req->r_tid); 2649 } else { 2650 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 2651 req, req->r_tid, req->r_map_dne_bound, map->epoch); 2652 } 2653 2654 if (req->r_map_dne_bound) { 2655 if (map->epoch >= req->r_map_dne_bound) { 2656 /* we had a new enough map */ 2657 pr_info_ratelimited("tid %llu pool does not exist\n", 2658 req->r_tid); 2659 complete_request(req, -ENOENT); 2660 } 2661 } else { 2662 send_map_check(req); 2663 } 2664 } 2665 2666 static void map_check_cb(struct ceph_mon_generic_request *greq) 2667 { 2668 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2669 struct ceph_osd_request *req; 2670 u64 tid = greq->private_data; 2671 2672 WARN_ON(greq->result || !greq->u.newest); 2673 2674 down_write(&osdc->lock); 2675 req = lookup_request_mc(&osdc->map_checks, tid); 2676 if (!req) { 2677 dout("%s tid %llu dne\n", __func__, tid); 2678 goto out_unlock; 2679 } 2680 2681 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 2682 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 2683 if (!req->r_map_dne_bound) 2684 req->r_map_dne_bound = greq->u.newest; 2685 erase_request_mc(&osdc->map_checks, req); 2686 check_pool_dne(req); 2687 2688 ceph_osdc_put_request(req); 2689 out_unlock: 2690 up_write(&osdc->lock); 2691 } 2692 2693 static void send_map_check(struct ceph_osd_request *req) 2694 { 2695 struct ceph_osd_client *osdc = req->r_osdc; 2696 struct ceph_osd_request *lookup_req; 2697 int ret; 2698 2699 verify_osdc_wrlocked(osdc); 2700 2701 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2702 if (lookup_req) { 2703 WARN_ON(lookup_req != req); 2704 return; 2705 } 2706 2707 ceph_osdc_get_request(req); 2708 insert_request_mc(&osdc->map_checks, req); 2709 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2710 map_check_cb, req->r_tid); 2711 WARN_ON(ret); 2712 } 2713 2714 /* 2715 * lingering requests, watch/notify v2 infrastructure 2716 */ 2717 static void linger_release(struct kref *kref) 2718 { 2719 struct ceph_osd_linger_request *lreq = 2720 container_of(kref, struct ceph_osd_linger_request, kref); 2721 2722 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 2723 lreq->reg_req, lreq->ping_req); 2724 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 2725 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 2726 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 2727 WARN_ON(!list_empty(&lreq->scan_item)); 2728 WARN_ON(!list_empty(&lreq->pending_lworks)); 2729 WARN_ON(lreq->osd); 2730 2731 if (lreq->request_pl) 2732 ceph_pagelist_release(lreq->request_pl); 2733 if (lreq->notify_id_pages) 2734 ceph_release_page_vector(lreq->notify_id_pages, 1); 2735 2736 ceph_osdc_put_request(lreq->reg_req); 2737 ceph_osdc_put_request(lreq->ping_req); 2738 target_destroy(&lreq->t); 2739 kfree(lreq); 2740 } 2741 2742 static void linger_put(struct ceph_osd_linger_request *lreq) 2743 { 2744 if (lreq) 2745 kref_put(&lreq->kref, linger_release); 2746 } 2747 2748 static struct ceph_osd_linger_request * 2749 linger_get(struct ceph_osd_linger_request *lreq) 2750 { 2751 kref_get(&lreq->kref); 2752 return lreq; 2753 } 2754 2755 static struct ceph_osd_linger_request * 2756 linger_alloc(struct ceph_osd_client *osdc) 2757 { 2758 struct ceph_osd_linger_request *lreq; 2759 2760 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 2761 if (!lreq) 2762 return NULL; 2763 2764 kref_init(&lreq->kref); 2765 mutex_init(&lreq->lock); 2766 RB_CLEAR_NODE(&lreq->node); 2767 RB_CLEAR_NODE(&lreq->osdc_node); 2768 RB_CLEAR_NODE(&lreq->mc_node); 2769 INIT_LIST_HEAD(&lreq->scan_item); 2770 INIT_LIST_HEAD(&lreq->pending_lworks); 2771 init_completion(&lreq->reg_commit_wait); 2772 init_completion(&lreq->notify_finish_wait); 2773 2774 lreq->osdc = osdc; 2775 target_init(&lreq->t); 2776 2777 dout("%s lreq %p\n", __func__, lreq); 2778 return lreq; 2779 } 2780 2781 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 2782 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 2783 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 2784 2785 /* 2786 * Create linger request <-> OSD session relation. 2787 * 2788 * @lreq has to be registered, @osd may be homeless. 2789 */ 2790 static void link_linger(struct ceph_osd *osd, 2791 struct ceph_osd_linger_request *lreq) 2792 { 2793 verify_osd_locked(osd); 2794 WARN_ON(!lreq->linger_id || lreq->osd); 2795 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2796 osd->o_osd, lreq, lreq->linger_id); 2797 2798 if (!osd_homeless(osd)) 2799 __remove_osd_from_lru(osd); 2800 else 2801 atomic_inc(&osd->o_osdc->num_homeless); 2802 2803 get_osd(osd); 2804 insert_linger(&osd->o_linger_requests, lreq); 2805 lreq->osd = osd; 2806 } 2807 2808 static void unlink_linger(struct ceph_osd *osd, 2809 struct ceph_osd_linger_request *lreq) 2810 { 2811 verify_osd_locked(osd); 2812 WARN_ON(lreq->osd != osd); 2813 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2814 osd->o_osd, lreq, lreq->linger_id); 2815 2816 lreq->osd = NULL; 2817 erase_linger(&osd->o_linger_requests, lreq); 2818 put_osd(osd); 2819 2820 if (!osd_homeless(osd)) 2821 maybe_move_osd_to_lru(osd); 2822 else 2823 atomic_dec(&osd->o_osdc->num_homeless); 2824 } 2825 2826 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 2827 { 2828 verify_osdc_locked(lreq->osdc); 2829 2830 return !RB_EMPTY_NODE(&lreq->osdc_node); 2831 } 2832 2833 static bool linger_registered(struct ceph_osd_linger_request *lreq) 2834 { 2835 struct ceph_osd_client *osdc = lreq->osdc; 2836 bool registered; 2837 2838 down_read(&osdc->lock); 2839 registered = __linger_registered(lreq); 2840 up_read(&osdc->lock); 2841 2842 return registered; 2843 } 2844 2845 static void linger_register(struct ceph_osd_linger_request *lreq) 2846 { 2847 struct ceph_osd_client *osdc = lreq->osdc; 2848 2849 verify_osdc_wrlocked(osdc); 2850 WARN_ON(lreq->linger_id); 2851 2852 linger_get(lreq); 2853 lreq->linger_id = ++osdc->last_linger_id; 2854 insert_linger_osdc(&osdc->linger_requests, lreq); 2855 } 2856 2857 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2858 { 2859 struct ceph_osd_client *osdc = lreq->osdc; 2860 2861 verify_osdc_wrlocked(osdc); 2862 2863 erase_linger_osdc(&osdc->linger_requests, lreq); 2864 linger_put(lreq); 2865 } 2866 2867 static void cancel_linger_request(struct ceph_osd_request *req) 2868 { 2869 struct ceph_osd_linger_request *lreq = req->r_priv; 2870 2871 WARN_ON(!req->r_linger); 2872 cancel_request(req); 2873 linger_put(lreq); 2874 } 2875 2876 struct linger_work { 2877 struct work_struct work; 2878 struct ceph_osd_linger_request *lreq; 2879 struct list_head pending_item; 2880 unsigned long queued_stamp; 2881 2882 union { 2883 struct { 2884 u64 notify_id; 2885 u64 notifier_id; 2886 void *payload; /* points into @msg front */ 2887 size_t payload_len; 2888 2889 struct ceph_msg *msg; /* for ceph_msg_put() */ 2890 } notify; 2891 struct { 2892 int err; 2893 } error; 2894 }; 2895 }; 2896 2897 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2898 work_func_t workfn) 2899 { 2900 struct linger_work *lwork; 2901 2902 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2903 if (!lwork) 2904 return NULL; 2905 2906 INIT_WORK(&lwork->work, workfn); 2907 INIT_LIST_HEAD(&lwork->pending_item); 2908 lwork->lreq = linger_get(lreq); 2909 2910 return lwork; 2911 } 2912 2913 static void lwork_free(struct linger_work *lwork) 2914 { 2915 struct ceph_osd_linger_request *lreq = lwork->lreq; 2916 2917 mutex_lock(&lreq->lock); 2918 list_del(&lwork->pending_item); 2919 mutex_unlock(&lreq->lock); 2920 2921 linger_put(lreq); 2922 kfree(lwork); 2923 } 2924 2925 static void lwork_queue(struct linger_work *lwork) 2926 { 2927 struct ceph_osd_linger_request *lreq = lwork->lreq; 2928 struct ceph_osd_client *osdc = lreq->osdc; 2929 2930 verify_lreq_locked(lreq); 2931 WARN_ON(!list_empty(&lwork->pending_item)); 2932 2933 lwork->queued_stamp = jiffies; 2934 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2935 queue_work(osdc->notify_wq, &lwork->work); 2936 } 2937 2938 static void do_watch_notify(struct work_struct *w) 2939 { 2940 struct linger_work *lwork = container_of(w, struct linger_work, work); 2941 struct ceph_osd_linger_request *lreq = lwork->lreq; 2942 2943 if (!linger_registered(lreq)) { 2944 dout("%s lreq %p not registered\n", __func__, lreq); 2945 goto out; 2946 } 2947 2948 WARN_ON(!lreq->is_watch); 2949 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2950 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2951 lwork->notify.payload_len); 2952 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2953 lwork->notify.notifier_id, lwork->notify.payload, 2954 lwork->notify.payload_len); 2955 2956 out: 2957 ceph_msg_put(lwork->notify.msg); 2958 lwork_free(lwork); 2959 } 2960 2961 static void do_watch_error(struct work_struct *w) 2962 { 2963 struct linger_work *lwork = container_of(w, struct linger_work, work); 2964 struct ceph_osd_linger_request *lreq = lwork->lreq; 2965 2966 if (!linger_registered(lreq)) { 2967 dout("%s lreq %p not registered\n", __func__, lreq); 2968 goto out; 2969 } 2970 2971 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2972 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2973 2974 out: 2975 lwork_free(lwork); 2976 } 2977 2978 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2979 { 2980 struct linger_work *lwork; 2981 2982 lwork = lwork_alloc(lreq, do_watch_error); 2983 if (!lwork) { 2984 pr_err("failed to allocate error-lwork\n"); 2985 return; 2986 } 2987 2988 lwork->error.err = lreq->last_error; 2989 lwork_queue(lwork); 2990 } 2991 2992 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2993 int result) 2994 { 2995 if (!completion_done(&lreq->reg_commit_wait)) { 2996 lreq->reg_commit_error = (result <= 0 ? result : 0); 2997 complete_all(&lreq->reg_commit_wait); 2998 } 2999 } 3000 3001 static void linger_commit_cb(struct ceph_osd_request *req) 3002 { 3003 struct ceph_osd_linger_request *lreq = req->r_priv; 3004 3005 mutex_lock(&lreq->lock); 3006 if (req != lreq->reg_req) { 3007 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n", 3008 __func__, lreq, lreq->linger_id, req, lreq->reg_req); 3009 goto out; 3010 } 3011 3012 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 3013 lreq->linger_id, req->r_result); 3014 linger_reg_commit_complete(lreq, req->r_result); 3015 lreq->committed = true; 3016 3017 if (!lreq->is_watch) { 3018 struct ceph_osd_data *osd_data = 3019 osd_req_op_data(req, 0, notify, response_data); 3020 void *p = page_address(osd_data->pages[0]); 3021 3022 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 3023 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 3024 3025 /* make note of the notify_id */ 3026 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 3027 lreq->notify_id = ceph_decode_64(&p); 3028 dout("lreq %p notify_id %llu\n", lreq, 3029 lreq->notify_id); 3030 } else { 3031 dout("lreq %p no notify_id\n", lreq); 3032 } 3033 } 3034 3035 out: 3036 mutex_unlock(&lreq->lock); 3037 linger_put(lreq); 3038 } 3039 3040 static int normalize_watch_error(int err) 3041 { 3042 /* 3043 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 3044 * notification and a failure to reconnect because we raced with 3045 * the delete appear the same to the user. 3046 */ 3047 if (err == -ENOENT) 3048 err = -ENOTCONN; 3049 3050 return err; 3051 } 3052 3053 static void linger_reconnect_cb(struct ceph_osd_request *req) 3054 { 3055 struct ceph_osd_linger_request *lreq = req->r_priv; 3056 3057 mutex_lock(&lreq->lock); 3058 if (req != lreq->reg_req) { 3059 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n", 3060 __func__, lreq, lreq->linger_id, req, lreq->reg_req); 3061 goto out; 3062 } 3063 3064 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 3065 lreq, lreq->linger_id, req->r_result, lreq->last_error); 3066 if (req->r_result < 0) { 3067 if (!lreq->last_error) { 3068 lreq->last_error = normalize_watch_error(req->r_result); 3069 queue_watch_error(lreq); 3070 } 3071 } 3072 3073 out: 3074 mutex_unlock(&lreq->lock); 3075 linger_put(lreq); 3076 } 3077 3078 static void send_linger(struct ceph_osd_linger_request *lreq) 3079 { 3080 struct ceph_osd_client *osdc = lreq->osdc; 3081 struct ceph_osd_request *req; 3082 int ret; 3083 3084 verify_osdc_wrlocked(osdc); 3085 mutex_lock(&lreq->lock); 3086 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3087 3088 if (lreq->reg_req) { 3089 if (lreq->reg_req->r_osd) 3090 cancel_linger_request(lreq->reg_req); 3091 ceph_osdc_put_request(lreq->reg_req); 3092 } 3093 3094 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO); 3095 BUG_ON(!req); 3096 3097 target_copy(&req->r_t, &lreq->t); 3098 req->r_mtime = lreq->mtime; 3099 3100 if (lreq->is_watch && lreq->committed) { 3101 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_RECONNECT, 3102 lreq->linger_id, ++lreq->register_gen); 3103 dout("lreq %p reconnect register_gen %u\n", lreq, 3104 req->r_ops[0].watch.gen); 3105 req->r_callback = linger_reconnect_cb; 3106 } else { 3107 if (lreq->is_watch) { 3108 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_WATCH, 3109 lreq->linger_id, 0); 3110 } else { 3111 lreq->notify_id = 0; 3112 3113 refcount_inc(&lreq->request_pl->refcnt); 3114 osd_req_op_notify_init(req, 0, lreq->linger_id, 3115 lreq->request_pl); 3116 ceph_osd_data_pages_init( 3117 osd_req_op_data(req, 0, notify, response_data), 3118 lreq->notify_id_pages, PAGE_SIZE, 0, false, false); 3119 } 3120 dout("lreq %p register\n", lreq); 3121 req->r_callback = linger_commit_cb; 3122 } 3123 3124 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3125 BUG_ON(ret); 3126 3127 req->r_priv = linger_get(lreq); 3128 req->r_linger = true; 3129 lreq->reg_req = req; 3130 mutex_unlock(&lreq->lock); 3131 3132 submit_request(req, true); 3133 } 3134 3135 static void linger_ping_cb(struct ceph_osd_request *req) 3136 { 3137 struct ceph_osd_linger_request *lreq = req->r_priv; 3138 3139 mutex_lock(&lreq->lock); 3140 if (req != lreq->ping_req) { 3141 dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n", 3142 __func__, lreq, lreq->linger_id, req, lreq->ping_req); 3143 goto out; 3144 } 3145 3146 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 3147 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 3148 lreq->last_error); 3149 if (lreq->register_gen == req->r_ops[0].watch.gen) { 3150 if (!req->r_result) { 3151 lreq->watch_valid_thru = lreq->ping_sent; 3152 } else if (!lreq->last_error) { 3153 lreq->last_error = normalize_watch_error(req->r_result); 3154 queue_watch_error(lreq); 3155 } 3156 } else { 3157 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 3158 lreq->register_gen, req->r_ops[0].watch.gen); 3159 } 3160 3161 out: 3162 mutex_unlock(&lreq->lock); 3163 linger_put(lreq); 3164 } 3165 3166 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 3167 { 3168 struct ceph_osd_client *osdc = lreq->osdc; 3169 struct ceph_osd_request *req; 3170 int ret; 3171 3172 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 3173 dout("%s PAUSERD\n", __func__); 3174 return; 3175 } 3176 3177 lreq->ping_sent = jiffies; 3178 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 3179 __func__, lreq, lreq->linger_id, lreq->ping_sent, 3180 lreq->register_gen); 3181 3182 if (lreq->ping_req) { 3183 if (lreq->ping_req->r_osd) 3184 cancel_linger_request(lreq->ping_req); 3185 ceph_osdc_put_request(lreq->ping_req); 3186 } 3187 3188 req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO); 3189 BUG_ON(!req); 3190 3191 target_copy(&req->r_t, &lreq->t); 3192 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_PING, lreq->linger_id, 3193 lreq->register_gen); 3194 req->r_callback = linger_ping_cb; 3195 3196 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3197 BUG_ON(ret); 3198 3199 req->r_priv = linger_get(lreq); 3200 req->r_linger = true; 3201 lreq->ping_req = req; 3202 3203 ceph_osdc_get_request(req); 3204 account_request(req); 3205 req->r_tid = atomic64_inc_return(&osdc->last_tid); 3206 link_request(lreq->osd, req); 3207 send_request(req); 3208 } 3209 3210 static void linger_submit(struct ceph_osd_linger_request *lreq) 3211 { 3212 struct ceph_osd_client *osdc = lreq->osdc; 3213 struct ceph_osd *osd; 3214 3215 down_write(&osdc->lock); 3216 linger_register(lreq); 3217 3218 calc_target(osdc, &lreq->t, false); 3219 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3220 link_linger(osd, lreq); 3221 3222 send_linger(lreq); 3223 up_write(&osdc->lock); 3224 } 3225 3226 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 3227 { 3228 struct ceph_osd_client *osdc = lreq->osdc; 3229 struct ceph_osd_linger_request *lookup_lreq; 3230 3231 verify_osdc_wrlocked(osdc); 3232 3233 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3234 lreq->linger_id); 3235 if (!lookup_lreq) 3236 return; 3237 3238 WARN_ON(lookup_lreq != lreq); 3239 erase_linger_mc(&osdc->linger_map_checks, lreq); 3240 linger_put(lreq); 3241 } 3242 3243 /* 3244 * @lreq has to be both registered and linked. 3245 */ 3246 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 3247 { 3248 if (lreq->ping_req && lreq->ping_req->r_osd) 3249 cancel_linger_request(lreq->ping_req); 3250 if (lreq->reg_req && lreq->reg_req->r_osd) 3251 cancel_linger_request(lreq->reg_req); 3252 cancel_linger_map_check(lreq); 3253 unlink_linger(lreq->osd, lreq); 3254 linger_unregister(lreq); 3255 } 3256 3257 static void linger_cancel(struct ceph_osd_linger_request *lreq) 3258 { 3259 struct ceph_osd_client *osdc = lreq->osdc; 3260 3261 down_write(&osdc->lock); 3262 if (__linger_registered(lreq)) 3263 __linger_cancel(lreq); 3264 up_write(&osdc->lock); 3265 } 3266 3267 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 3268 3269 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 3270 { 3271 struct ceph_osd_client *osdc = lreq->osdc; 3272 struct ceph_osdmap *map = osdc->osdmap; 3273 3274 verify_osdc_wrlocked(osdc); 3275 WARN_ON(!map->epoch); 3276 3277 if (lreq->register_gen) { 3278 lreq->map_dne_bound = map->epoch; 3279 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 3280 lreq, lreq->linger_id); 3281 } else { 3282 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 3283 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3284 map->epoch); 3285 } 3286 3287 if (lreq->map_dne_bound) { 3288 if (map->epoch >= lreq->map_dne_bound) { 3289 /* we had a new enough map */ 3290 pr_info("linger_id %llu pool does not exist\n", 3291 lreq->linger_id); 3292 linger_reg_commit_complete(lreq, -ENOENT); 3293 __linger_cancel(lreq); 3294 } 3295 } else { 3296 send_linger_map_check(lreq); 3297 } 3298 } 3299 3300 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 3301 { 3302 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 3303 struct ceph_osd_linger_request *lreq; 3304 u64 linger_id = greq->private_data; 3305 3306 WARN_ON(greq->result || !greq->u.newest); 3307 3308 down_write(&osdc->lock); 3309 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 3310 if (!lreq) { 3311 dout("%s linger_id %llu dne\n", __func__, linger_id); 3312 goto out_unlock; 3313 } 3314 3315 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 3316 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3317 greq->u.newest); 3318 if (!lreq->map_dne_bound) 3319 lreq->map_dne_bound = greq->u.newest; 3320 erase_linger_mc(&osdc->linger_map_checks, lreq); 3321 check_linger_pool_dne(lreq); 3322 3323 linger_put(lreq); 3324 out_unlock: 3325 up_write(&osdc->lock); 3326 } 3327 3328 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 3329 { 3330 struct ceph_osd_client *osdc = lreq->osdc; 3331 struct ceph_osd_linger_request *lookup_lreq; 3332 int ret; 3333 3334 verify_osdc_wrlocked(osdc); 3335 3336 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3337 lreq->linger_id); 3338 if (lookup_lreq) { 3339 WARN_ON(lookup_lreq != lreq); 3340 return; 3341 } 3342 3343 linger_get(lreq); 3344 insert_linger_mc(&osdc->linger_map_checks, lreq); 3345 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 3346 linger_map_check_cb, lreq->linger_id); 3347 WARN_ON(ret); 3348 } 3349 3350 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 3351 { 3352 int ret; 3353 3354 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3355 ret = wait_for_completion_killable(&lreq->reg_commit_wait); 3356 return ret ?: lreq->reg_commit_error; 3357 } 3358 3359 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq, 3360 unsigned long timeout) 3361 { 3362 long left; 3363 3364 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3365 left = wait_for_completion_killable_timeout(&lreq->notify_finish_wait, 3366 ceph_timeout_jiffies(timeout)); 3367 if (left <= 0) 3368 left = left ?: -ETIMEDOUT; 3369 else 3370 left = lreq->notify_finish_error; /* completed */ 3371 3372 return left; 3373 } 3374 3375 /* 3376 * Timeout callback, called every N seconds. When 1 or more OSD 3377 * requests has been active for more than N seconds, we send a keepalive 3378 * (tag + timestamp) to its OSD to ensure any communications channel 3379 * reset is detected. 3380 */ 3381 static void handle_timeout(struct work_struct *work) 3382 { 3383 struct ceph_osd_client *osdc = 3384 container_of(work, struct ceph_osd_client, timeout_work.work); 3385 struct ceph_options *opts = osdc->client->options; 3386 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 3387 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout; 3388 LIST_HEAD(slow_osds); 3389 struct rb_node *n, *p; 3390 3391 dout("%s osdc %p\n", __func__, osdc); 3392 down_write(&osdc->lock); 3393 3394 /* 3395 * ping osds that are a bit slow. this ensures that if there 3396 * is a break in the TCP connection we will notice, and reopen 3397 * a connection with that osd (from the fault callback). 3398 */ 3399 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3400 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3401 bool found = false; 3402 3403 for (p = rb_first(&osd->o_requests); p; ) { 3404 struct ceph_osd_request *req = 3405 rb_entry(p, struct ceph_osd_request, r_node); 3406 3407 p = rb_next(p); /* abort_request() */ 3408 3409 if (time_before(req->r_stamp, cutoff)) { 3410 dout(" req %p tid %llu on osd%d is laggy\n", 3411 req, req->r_tid, osd->o_osd); 3412 found = true; 3413 } 3414 if (opts->osd_request_timeout && 3415 time_before(req->r_start_stamp, expiry_cutoff)) { 3416 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3417 req->r_tid, osd->o_osd); 3418 abort_request(req, -ETIMEDOUT); 3419 } 3420 } 3421 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 3422 struct ceph_osd_linger_request *lreq = 3423 rb_entry(p, struct ceph_osd_linger_request, node); 3424 3425 dout(" lreq %p linger_id %llu is served by osd%d\n", 3426 lreq, lreq->linger_id, osd->o_osd); 3427 found = true; 3428 3429 mutex_lock(&lreq->lock); 3430 if (lreq->is_watch && lreq->committed && !lreq->last_error) 3431 send_linger_ping(lreq); 3432 mutex_unlock(&lreq->lock); 3433 } 3434 3435 if (found) 3436 list_move_tail(&osd->o_keepalive_item, &slow_osds); 3437 } 3438 3439 if (opts->osd_request_timeout) { 3440 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 3441 struct ceph_osd_request *req = 3442 rb_entry(p, struct ceph_osd_request, r_node); 3443 3444 p = rb_next(p); /* abort_request() */ 3445 3446 if (time_before(req->r_start_stamp, expiry_cutoff)) { 3447 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3448 req->r_tid, osdc->homeless_osd.o_osd); 3449 abort_request(req, -ETIMEDOUT); 3450 } 3451 } 3452 } 3453 3454 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 3455 maybe_request_map(osdc); 3456 3457 while (!list_empty(&slow_osds)) { 3458 struct ceph_osd *osd = list_first_entry(&slow_osds, 3459 struct ceph_osd, 3460 o_keepalive_item); 3461 list_del_init(&osd->o_keepalive_item); 3462 ceph_con_keepalive(&osd->o_con); 3463 } 3464 3465 up_write(&osdc->lock); 3466 schedule_delayed_work(&osdc->timeout_work, 3467 osdc->client->options->osd_keepalive_timeout); 3468 } 3469 3470 static void handle_osds_timeout(struct work_struct *work) 3471 { 3472 struct ceph_osd_client *osdc = 3473 container_of(work, struct ceph_osd_client, 3474 osds_timeout_work.work); 3475 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 3476 struct ceph_osd *osd, *nosd; 3477 3478 dout("%s osdc %p\n", __func__, osdc); 3479 down_write(&osdc->lock); 3480 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 3481 if (time_before(jiffies, osd->lru_ttl)) 3482 break; 3483 3484 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 3485 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 3486 close_osd(osd); 3487 } 3488 3489 up_write(&osdc->lock); 3490 schedule_delayed_work(&osdc->osds_timeout_work, 3491 round_jiffies_relative(delay)); 3492 } 3493 3494 static int ceph_oloc_decode(void **p, void *end, 3495 struct ceph_object_locator *oloc) 3496 { 3497 u8 struct_v, struct_cv; 3498 u32 len; 3499 void *struct_end; 3500 int ret = 0; 3501 3502 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3503 struct_v = ceph_decode_8(p); 3504 struct_cv = ceph_decode_8(p); 3505 if (struct_v < 3) { 3506 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 3507 struct_v, struct_cv); 3508 goto e_inval; 3509 } 3510 if (struct_cv > 6) { 3511 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 3512 struct_v, struct_cv); 3513 goto e_inval; 3514 } 3515 len = ceph_decode_32(p); 3516 ceph_decode_need(p, end, len, e_inval); 3517 struct_end = *p + len; 3518 3519 oloc->pool = ceph_decode_64(p); 3520 *p += 4; /* skip preferred */ 3521 3522 len = ceph_decode_32(p); 3523 if (len > 0) { 3524 pr_warn("ceph_object_locator::key is set\n"); 3525 goto e_inval; 3526 } 3527 3528 if (struct_v >= 5) { 3529 bool changed = false; 3530 3531 len = ceph_decode_32(p); 3532 if (len > 0) { 3533 ceph_decode_need(p, end, len, e_inval); 3534 if (!oloc->pool_ns || 3535 ceph_compare_string(oloc->pool_ns, *p, len)) 3536 changed = true; 3537 *p += len; 3538 } else { 3539 if (oloc->pool_ns) 3540 changed = true; 3541 } 3542 if (changed) { 3543 /* redirect changes namespace */ 3544 pr_warn("ceph_object_locator::nspace is changed\n"); 3545 goto e_inval; 3546 } 3547 } 3548 3549 if (struct_v >= 6) { 3550 s64 hash = ceph_decode_64(p); 3551 if (hash != -1) { 3552 pr_warn("ceph_object_locator::hash is set\n"); 3553 goto e_inval; 3554 } 3555 } 3556 3557 /* skip the rest */ 3558 *p = struct_end; 3559 out: 3560 return ret; 3561 3562 e_inval: 3563 ret = -EINVAL; 3564 goto out; 3565 } 3566 3567 static int ceph_redirect_decode(void **p, void *end, 3568 struct ceph_request_redirect *redir) 3569 { 3570 u8 struct_v, struct_cv; 3571 u32 len; 3572 void *struct_end; 3573 int ret; 3574 3575 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3576 struct_v = ceph_decode_8(p); 3577 struct_cv = ceph_decode_8(p); 3578 if (struct_cv > 1) { 3579 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 3580 struct_v, struct_cv); 3581 goto e_inval; 3582 } 3583 len = ceph_decode_32(p); 3584 ceph_decode_need(p, end, len, e_inval); 3585 struct_end = *p + len; 3586 3587 ret = ceph_oloc_decode(p, end, &redir->oloc); 3588 if (ret) 3589 goto out; 3590 3591 len = ceph_decode_32(p); 3592 if (len > 0) { 3593 pr_warn("ceph_request_redirect::object_name is set\n"); 3594 goto e_inval; 3595 } 3596 3597 /* skip the rest */ 3598 *p = struct_end; 3599 out: 3600 return ret; 3601 3602 e_inval: 3603 ret = -EINVAL; 3604 goto out; 3605 } 3606 3607 struct MOSDOpReply { 3608 struct ceph_pg pgid; 3609 u64 flags; 3610 int result; 3611 u32 epoch; 3612 int num_ops; 3613 u32 outdata_len[CEPH_OSD_MAX_OPS]; 3614 s32 rval[CEPH_OSD_MAX_OPS]; 3615 int retry_attempt; 3616 struct ceph_eversion replay_version; 3617 u64 user_version; 3618 struct ceph_request_redirect redirect; 3619 }; 3620 3621 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 3622 { 3623 void *p = msg->front.iov_base; 3624 void *const end = p + msg->front.iov_len; 3625 u16 version = le16_to_cpu(msg->hdr.version); 3626 struct ceph_eversion bad_replay_version; 3627 u8 decode_redir; 3628 u32 len; 3629 int ret; 3630 int i; 3631 3632 ceph_decode_32_safe(&p, end, len, e_inval); 3633 ceph_decode_need(&p, end, len, e_inval); 3634 p += len; /* skip oid */ 3635 3636 ret = ceph_decode_pgid(&p, end, &m->pgid); 3637 if (ret) 3638 return ret; 3639 3640 ceph_decode_64_safe(&p, end, m->flags, e_inval); 3641 ceph_decode_32_safe(&p, end, m->result, e_inval); 3642 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 3643 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 3644 p += sizeof(bad_replay_version); 3645 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 3646 3647 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 3648 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 3649 goto e_inval; 3650 3651 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 3652 e_inval); 3653 for (i = 0; i < m->num_ops; i++) { 3654 struct ceph_osd_op *op = p; 3655 3656 m->outdata_len[i] = le32_to_cpu(op->payload_len); 3657 p += sizeof(*op); 3658 } 3659 3660 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 3661 for (i = 0; i < m->num_ops; i++) 3662 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 3663 3664 if (version >= 5) { 3665 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 3666 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 3667 p += sizeof(m->replay_version); 3668 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 3669 } else { 3670 m->replay_version = bad_replay_version; /* struct */ 3671 m->user_version = le64_to_cpu(m->replay_version.version); 3672 } 3673 3674 if (version >= 6) { 3675 if (version >= 7) 3676 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 3677 else 3678 decode_redir = 1; 3679 } else { 3680 decode_redir = 0; 3681 } 3682 3683 if (decode_redir) { 3684 ret = ceph_redirect_decode(&p, end, &m->redirect); 3685 if (ret) 3686 return ret; 3687 } else { 3688 ceph_oloc_init(&m->redirect.oloc); 3689 } 3690 3691 return 0; 3692 3693 e_inval: 3694 return -EINVAL; 3695 } 3696 3697 /* 3698 * Handle MOSDOpReply. Set ->r_result and call the callback if it is 3699 * specified. 3700 */ 3701 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 3702 { 3703 struct ceph_osd_client *osdc = osd->o_osdc; 3704 struct ceph_osd_request *req; 3705 struct MOSDOpReply m; 3706 u64 tid = le64_to_cpu(msg->hdr.tid); 3707 u32 data_len = 0; 3708 int ret; 3709 int i; 3710 3711 dout("%s msg %p tid %llu\n", __func__, msg, tid); 3712 3713 down_read(&osdc->lock); 3714 if (!osd_registered(osd)) { 3715 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3716 goto out_unlock_osdc; 3717 } 3718 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 3719 3720 mutex_lock(&osd->lock); 3721 req = lookup_request(&osd->o_requests, tid); 3722 if (!req) { 3723 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 3724 goto out_unlock_session; 3725 } 3726 3727 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 3728 ret = decode_MOSDOpReply(msg, &m); 3729 m.redirect.oloc.pool_ns = NULL; 3730 if (ret) { 3731 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 3732 req->r_tid, ret); 3733 ceph_msg_dump(msg); 3734 goto fail_request; 3735 } 3736 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 3737 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 3738 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 3739 le64_to_cpu(m.replay_version.version), m.user_version); 3740 3741 if (m.retry_attempt >= 0) { 3742 if (m.retry_attempt != req->r_attempts - 1) { 3743 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 3744 req, req->r_tid, m.retry_attempt, 3745 req->r_attempts - 1); 3746 goto out_unlock_session; 3747 } 3748 } else { 3749 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 3750 } 3751 3752 if (!ceph_oloc_empty(&m.redirect.oloc)) { 3753 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 3754 m.redirect.oloc.pool); 3755 unlink_request(osd, req); 3756 mutex_unlock(&osd->lock); 3757 3758 /* 3759 * Not ceph_oloc_copy() - changing pool_ns is not 3760 * supported. 3761 */ 3762 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 3763 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED | 3764 CEPH_OSD_FLAG_IGNORE_OVERLAY | 3765 CEPH_OSD_FLAG_IGNORE_CACHE; 3766 req->r_tid = 0; 3767 __submit_request(req, false); 3768 goto out_unlock_osdc; 3769 } 3770 3771 if (m.result == -EAGAIN) { 3772 dout("req %p tid %llu EAGAIN\n", req, req->r_tid); 3773 unlink_request(osd, req); 3774 mutex_unlock(&osd->lock); 3775 3776 /* 3777 * The object is missing on the replica or not (yet) 3778 * readable. Clear pgid to force a resend to the primary 3779 * via legacy_change. 3780 */ 3781 req->r_t.pgid.pool = 0; 3782 req->r_t.pgid.seed = 0; 3783 WARN_ON(!req->r_t.used_replica); 3784 req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS | 3785 CEPH_OSD_FLAG_LOCALIZE_READS); 3786 req->r_tid = 0; 3787 __submit_request(req, false); 3788 goto out_unlock_osdc; 3789 } 3790 3791 if (m.num_ops != req->r_num_ops) { 3792 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 3793 req->r_num_ops, req->r_tid); 3794 goto fail_request; 3795 } 3796 for (i = 0; i < req->r_num_ops; i++) { 3797 dout(" req %p tid %llu op %d rval %d len %u\n", req, 3798 req->r_tid, i, m.rval[i], m.outdata_len[i]); 3799 req->r_ops[i].rval = m.rval[i]; 3800 req->r_ops[i].outdata_len = m.outdata_len[i]; 3801 data_len += m.outdata_len[i]; 3802 } 3803 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 3804 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 3805 le32_to_cpu(msg->hdr.data_len), req->r_tid); 3806 goto fail_request; 3807 } 3808 dout("%s req %p tid %llu result %d data_len %u\n", __func__, 3809 req, req->r_tid, m.result, data_len); 3810 3811 /* 3812 * Since we only ever request ONDISK, we should only ever get 3813 * one (type of) reply back. 3814 */ 3815 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK)); 3816 req->r_result = m.result ?: data_len; 3817 finish_request(req); 3818 mutex_unlock(&osd->lock); 3819 up_read(&osdc->lock); 3820 3821 __complete_request(req); 3822 return; 3823 3824 fail_request: 3825 complete_request(req, -EIO); 3826 out_unlock_session: 3827 mutex_unlock(&osd->lock); 3828 out_unlock_osdc: 3829 up_read(&osdc->lock); 3830 } 3831 3832 static void set_pool_was_full(struct ceph_osd_client *osdc) 3833 { 3834 struct rb_node *n; 3835 3836 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 3837 struct ceph_pg_pool_info *pi = 3838 rb_entry(n, struct ceph_pg_pool_info, node); 3839 3840 pi->was_full = __pool_full(pi); 3841 } 3842 } 3843 3844 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 3845 { 3846 struct ceph_pg_pool_info *pi; 3847 3848 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 3849 if (!pi) 3850 return false; 3851 3852 return pi->was_full && !__pool_full(pi); 3853 } 3854 3855 static enum calc_target_result 3856 recalc_linger_target(struct ceph_osd_linger_request *lreq) 3857 { 3858 struct ceph_osd_client *osdc = lreq->osdc; 3859 enum calc_target_result ct_res; 3860 3861 ct_res = calc_target(osdc, &lreq->t, true); 3862 if (ct_res == CALC_TARGET_NEED_RESEND) { 3863 struct ceph_osd *osd; 3864 3865 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3866 if (osd != lreq->osd) { 3867 unlink_linger(lreq->osd, lreq); 3868 link_linger(osd, lreq); 3869 } 3870 } 3871 3872 return ct_res; 3873 } 3874 3875 /* 3876 * Requeue requests whose mapping to an OSD has changed. 3877 */ 3878 static void scan_requests(struct ceph_osd *osd, 3879 bool force_resend, 3880 bool cleared_full, 3881 bool check_pool_cleared_full, 3882 struct rb_root *need_resend, 3883 struct list_head *need_resend_linger) 3884 { 3885 struct ceph_osd_client *osdc = osd->o_osdc; 3886 struct rb_node *n; 3887 bool force_resend_writes; 3888 3889 for (n = rb_first(&osd->o_linger_requests); n; ) { 3890 struct ceph_osd_linger_request *lreq = 3891 rb_entry(n, struct ceph_osd_linger_request, node); 3892 enum calc_target_result ct_res; 3893 3894 n = rb_next(n); /* recalc_linger_target() */ 3895 3896 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 3897 lreq->linger_id); 3898 ct_res = recalc_linger_target(lreq); 3899 switch (ct_res) { 3900 case CALC_TARGET_NO_ACTION: 3901 force_resend_writes = cleared_full || 3902 (check_pool_cleared_full && 3903 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 3904 if (!force_resend && !force_resend_writes) 3905 break; 3906 3907 fallthrough; 3908 case CALC_TARGET_NEED_RESEND: 3909 cancel_linger_map_check(lreq); 3910 /* 3911 * scan_requests() for the previous epoch(s) 3912 * may have already added it to the list, since 3913 * it's not unlinked here. 3914 */ 3915 if (list_empty(&lreq->scan_item)) 3916 list_add_tail(&lreq->scan_item, need_resend_linger); 3917 break; 3918 case CALC_TARGET_POOL_DNE: 3919 list_del_init(&lreq->scan_item); 3920 check_linger_pool_dne(lreq); 3921 break; 3922 } 3923 } 3924 3925 for (n = rb_first(&osd->o_requests); n; ) { 3926 struct ceph_osd_request *req = 3927 rb_entry(n, struct ceph_osd_request, r_node); 3928 enum calc_target_result ct_res; 3929 3930 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3931 3932 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3933 ct_res = calc_target(osdc, &req->r_t, false); 3934 switch (ct_res) { 3935 case CALC_TARGET_NO_ACTION: 3936 force_resend_writes = cleared_full || 3937 (check_pool_cleared_full && 3938 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3939 if (!force_resend && 3940 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3941 !force_resend_writes)) 3942 break; 3943 3944 fallthrough; 3945 case CALC_TARGET_NEED_RESEND: 3946 cancel_map_check(req); 3947 unlink_request(osd, req); 3948 insert_request(need_resend, req); 3949 break; 3950 case CALC_TARGET_POOL_DNE: 3951 check_pool_dne(req); 3952 break; 3953 } 3954 } 3955 } 3956 3957 static int handle_one_map(struct ceph_osd_client *osdc, 3958 void *p, void *end, bool incremental, 3959 struct rb_root *need_resend, 3960 struct list_head *need_resend_linger) 3961 { 3962 struct ceph_osdmap *newmap; 3963 struct rb_node *n; 3964 bool skipped_map = false; 3965 bool was_full; 3966 3967 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3968 set_pool_was_full(osdc); 3969 3970 if (incremental) 3971 newmap = osdmap_apply_incremental(&p, end, 3972 ceph_msgr2(osdc->client), 3973 osdc->osdmap); 3974 else 3975 newmap = ceph_osdmap_decode(&p, end, ceph_msgr2(osdc->client)); 3976 if (IS_ERR(newmap)) 3977 return PTR_ERR(newmap); 3978 3979 if (newmap != osdc->osdmap) { 3980 /* 3981 * Preserve ->was_full before destroying the old map. 3982 * For pools that weren't in the old map, ->was_full 3983 * should be false. 3984 */ 3985 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3986 struct ceph_pg_pool_info *pi = 3987 rb_entry(n, struct ceph_pg_pool_info, node); 3988 struct ceph_pg_pool_info *old_pi; 3989 3990 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3991 if (old_pi) 3992 pi->was_full = old_pi->was_full; 3993 else 3994 WARN_ON(pi->was_full); 3995 } 3996 3997 if (osdc->osdmap->epoch && 3998 osdc->osdmap->epoch + 1 < newmap->epoch) { 3999 WARN_ON(incremental); 4000 skipped_map = true; 4001 } 4002 4003 ceph_osdmap_destroy(osdc->osdmap); 4004 osdc->osdmap = newmap; 4005 } 4006 4007 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 4008 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 4009 need_resend, need_resend_linger); 4010 4011 for (n = rb_first(&osdc->osds); n; ) { 4012 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 4013 4014 n = rb_next(n); /* close_osd() */ 4015 4016 scan_requests(osd, skipped_map, was_full, true, need_resend, 4017 need_resend_linger); 4018 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 4019 memcmp(&osd->o_con.peer_addr, 4020 ceph_osd_addr(osdc->osdmap, osd->o_osd), 4021 sizeof(struct ceph_entity_addr))) 4022 close_osd(osd); 4023 } 4024 4025 return 0; 4026 } 4027 4028 static void kick_requests(struct ceph_osd_client *osdc, 4029 struct rb_root *need_resend, 4030 struct list_head *need_resend_linger) 4031 { 4032 struct ceph_osd_linger_request *lreq, *nlreq; 4033 enum calc_target_result ct_res; 4034 struct rb_node *n; 4035 4036 /* make sure need_resend targets reflect latest map */ 4037 for (n = rb_first(need_resend); n; ) { 4038 struct ceph_osd_request *req = 4039 rb_entry(n, struct ceph_osd_request, r_node); 4040 4041 n = rb_next(n); 4042 4043 if (req->r_t.epoch < osdc->osdmap->epoch) { 4044 ct_res = calc_target(osdc, &req->r_t, false); 4045 if (ct_res == CALC_TARGET_POOL_DNE) { 4046 erase_request(need_resend, req); 4047 check_pool_dne(req); 4048 } 4049 } 4050 } 4051 4052 for (n = rb_first(need_resend); n; ) { 4053 struct ceph_osd_request *req = 4054 rb_entry(n, struct ceph_osd_request, r_node); 4055 struct ceph_osd *osd; 4056 4057 n = rb_next(n); 4058 erase_request(need_resend, req); /* before link_request() */ 4059 4060 osd = lookup_create_osd(osdc, req->r_t.osd, true); 4061 link_request(osd, req); 4062 if (!req->r_linger) { 4063 if (!osd_homeless(osd) && !req->r_t.paused) 4064 send_request(req); 4065 } else { 4066 cancel_linger_request(req); 4067 } 4068 } 4069 4070 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 4071 if (!osd_homeless(lreq->osd)) 4072 send_linger(lreq); 4073 4074 list_del_init(&lreq->scan_item); 4075 } 4076 } 4077 4078 /* 4079 * Process updated osd map. 4080 * 4081 * The message contains any number of incremental and full maps, normally 4082 * indicating some sort of topology change in the cluster. Kick requests 4083 * off to different OSDs as needed. 4084 */ 4085 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 4086 { 4087 void *p = msg->front.iov_base; 4088 void *const end = p + msg->front.iov_len; 4089 u32 nr_maps, maplen; 4090 u32 epoch; 4091 struct ceph_fsid fsid; 4092 struct rb_root need_resend = RB_ROOT; 4093 LIST_HEAD(need_resend_linger); 4094 bool handled_incremental = false; 4095 bool was_pauserd, was_pausewr; 4096 bool pauserd, pausewr; 4097 int err; 4098 4099 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 4100 down_write(&osdc->lock); 4101 4102 /* verify fsid */ 4103 ceph_decode_need(&p, end, sizeof(fsid), bad); 4104 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 4105 if (ceph_check_fsid(osdc->client, &fsid) < 0) 4106 goto bad; 4107 4108 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 4109 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 4110 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 4111 have_pool_full(osdc); 4112 4113 /* incremental maps */ 4114 ceph_decode_32_safe(&p, end, nr_maps, bad); 4115 dout(" %d inc maps\n", nr_maps); 4116 while (nr_maps > 0) { 4117 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 4118 epoch = ceph_decode_32(&p); 4119 maplen = ceph_decode_32(&p); 4120 ceph_decode_need(&p, end, maplen, bad); 4121 if (osdc->osdmap->epoch && 4122 osdc->osdmap->epoch + 1 == epoch) { 4123 dout("applying incremental map %u len %d\n", 4124 epoch, maplen); 4125 err = handle_one_map(osdc, p, p + maplen, true, 4126 &need_resend, &need_resend_linger); 4127 if (err) 4128 goto bad; 4129 handled_incremental = true; 4130 } else { 4131 dout("ignoring incremental map %u len %d\n", 4132 epoch, maplen); 4133 } 4134 p += maplen; 4135 nr_maps--; 4136 } 4137 if (handled_incremental) 4138 goto done; 4139 4140 /* full maps */ 4141 ceph_decode_32_safe(&p, end, nr_maps, bad); 4142 dout(" %d full maps\n", nr_maps); 4143 while (nr_maps) { 4144 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 4145 epoch = ceph_decode_32(&p); 4146 maplen = ceph_decode_32(&p); 4147 ceph_decode_need(&p, end, maplen, bad); 4148 if (nr_maps > 1) { 4149 dout("skipping non-latest full map %u len %d\n", 4150 epoch, maplen); 4151 } else if (osdc->osdmap->epoch >= epoch) { 4152 dout("skipping full map %u len %d, " 4153 "older than our %u\n", epoch, maplen, 4154 osdc->osdmap->epoch); 4155 } else { 4156 dout("taking full map %u len %d\n", epoch, maplen); 4157 err = handle_one_map(osdc, p, p + maplen, false, 4158 &need_resend, &need_resend_linger); 4159 if (err) 4160 goto bad; 4161 } 4162 p += maplen; 4163 nr_maps--; 4164 } 4165 4166 done: 4167 /* 4168 * subscribe to subsequent osdmap updates if full to ensure 4169 * we find out when we are no longer full and stop returning 4170 * ENOSPC. 4171 */ 4172 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 4173 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 4174 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 4175 have_pool_full(osdc); 4176 if (was_pauserd || was_pausewr || pauserd || pausewr || 4177 osdc->osdmap->epoch < osdc->epoch_barrier) 4178 maybe_request_map(osdc); 4179 4180 kick_requests(osdc, &need_resend, &need_resend_linger); 4181 4182 ceph_osdc_abort_on_full(osdc); 4183 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 4184 osdc->osdmap->epoch); 4185 up_write(&osdc->lock); 4186 wake_up_all(&osdc->client->auth_wq); 4187 return; 4188 4189 bad: 4190 pr_err("osdc handle_map corrupt msg\n"); 4191 ceph_msg_dump(msg); 4192 up_write(&osdc->lock); 4193 } 4194 4195 /* 4196 * Resubmit requests pending on the given osd. 4197 */ 4198 static void kick_osd_requests(struct ceph_osd *osd) 4199 { 4200 struct rb_node *n; 4201 4202 clear_backoffs(osd); 4203 4204 for (n = rb_first(&osd->o_requests); n; ) { 4205 struct ceph_osd_request *req = 4206 rb_entry(n, struct ceph_osd_request, r_node); 4207 4208 n = rb_next(n); /* cancel_linger_request() */ 4209 4210 if (!req->r_linger) { 4211 if (!req->r_t.paused) 4212 send_request(req); 4213 } else { 4214 cancel_linger_request(req); 4215 } 4216 } 4217 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 4218 struct ceph_osd_linger_request *lreq = 4219 rb_entry(n, struct ceph_osd_linger_request, node); 4220 4221 send_linger(lreq); 4222 } 4223 } 4224 4225 /* 4226 * If the osd connection drops, we need to resubmit all requests. 4227 */ 4228 static void osd_fault(struct ceph_connection *con) 4229 { 4230 struct ceph_osd *osd = con->private; 4231 struct ceph_osd_client *osdc = osd->o_osdc; 4232 4233 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 4234 4235 down_write(&osdc->lock); 4236 if (!osd_registered(osd)) { 4237 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4238 goto out_unlock; 4239 } 4240 4241 if (!reopen_osd(osd)) 4242 kick_osd_requests(osd); 4243 maybe_request_map(osdc); 4244 4245 out_unlock: 4246 up_write(&osdc->lock); 4247 } 4248 4249 struct MOSDBackoff { 4250 struct ceph_spg spgid; 4251 u32 map_epoch; 4252 u8 op; 4253 u64 id; 4254 struct ceph_hobject_id *begin; 4255 struct ceph_hobject_id *end; 4256 }; 4257 4258 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m) 4259 { 4260 void *p = msg->front.iov_base; 4261 void *const end = p + msg->front.iov_len; 4262 u8 struct_v; 4263 u32 struct_len; 4264 int ret; 4265 4266 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len); 4267 if (ret) 4268 return ret; 4269 4270 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid); 4271 if (ret) 4272 return ret; 4273 4274 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval); 4275 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval); 4276 ceph_decode_8_safe(&p, end, m->op, e_inval); 4277 ceph_decode_64_safe(&p, end, m->id, e_inval); 4278 4279 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO); 4280 if (!m->begin) 4281 return -ENOMEM; 4282 4283 ret = decode_hoid(&p, end, m->begin); 4284 if (ret) { 4285 free_hoid(m->begin); 4286 return ret; 4287 } 4288 4289 m->end = kzalloc(sizeof(*m->end), GFP_NOIO); 4290 if (!m->end) { 4291 free_hoid(m->begin); 4292 return -ENOMEM; 4293 } 4294 4295 ret = decode_hoid(&p, end, m->end); 4296 if (ret) { 4297 free_hoid(m->begin); 4298 free_hoid(m->end); 4299 return ret; 4300 } 4301 4302 return 0; 4303 4304 e_inval: 4305 return -EINVAL; 4306 } 4307 4308 static struct ceph_msg *create_backoff_message( 4309 const struct ceph_osd_backoff *backoff, 4310 u32 map_epoch) 4311 { 4312 struct ceph_msg *msg; 4313 void *p, *end; 4314 int msg_size; 4315 4316 msg_size = CEPH_ENCODING_START_BLK_LEN + 4317 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 4318 msg_size += 4 + 1 + 8; /* map_epoch, op, id */ 4319 msg_size += CEPH_ENCODING_START_BLK_LEN + 4320 hoid_encoding_size(backoff->begin); 4321 msg_size += CEPH_ENCODING_START_BLK_LEN + 4322 hoid_encoding_size(backoff->end); 4323 4324 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true); 4325 if (!msg) 4326 return NULL; 4327 4328 p = msg->front.iov_base; 4329 end = p + msg->front_alloc_len; 4330 4331 encode_spgid(&p, &backoff->spgid); 4332 ceph_encode_32(&p, map_epoch); 4333 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK); 4334 ceph_encode_64(&p, backoff->id); 4335 encode_hoid(&p, end, backoff->begin); 4336 encode_hoid(&p, end, backoff->end); 4337 BUG_ON(p != end); 4338 4339 msg->front.iov_len = p - msg->front.iov_base; 4340 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */ 4341 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 4342 4343 return msg; 4344 } 4345 4346 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m) 4347 { 4348 struct ceph_spg_mapping *spg; 4349 struct ceph_osd_backoff *backoff; 4350 struct ceph_msg *msg; 4351 4352 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4353 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4354 4355 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid); 4356 if (!spg) { 4357 spg = alloc_spg_mapping(); 4358 if (!spg) { 4359 pr_err("%s failed to allocate spg\n", __func__); 4360 return; 4361 } 4362 spg->spgid = m->spgid; /* struct */ 4363 insert_spg_mapping(&osd->o_backoff_mappings, spg); 4364 } 4365 4366 backoff = alloc_backoff(); 4367 if (!backoff) { 4368 pr_err("%s failed to allocate backoff\n", __func__); 4369 return; 4370 } 4371 backoff->spgid = m->spgid; /* struct */ 4372 backoff->id = m->id; 4373 backoff->begin = m->begin; 4374 m->begin = NULL; /* backoff now owns this */ 4375 backoff->end = m->end; 4376 m->end = NULL; /* ditto */ 4377 4378 insert_backoff(&spg->backoffs, backoff); 4379 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4380 4381 /* 4382 * Ack with original backoff's epoch so that the OSD can 4383 * discard this if there was a PG split. 4384 */ 4385 msg = create_backoff_message(backoff, m->map_epoch); 4386 if (!msg) { 4387 pr_err("%s failed to allocate msg\n", __func__); 4388 return; 4389 } 4390 ceph_con_send(&osd->o_con, msg); 4391 } 4392 4393 static bool target_contained_by(const struct ceph_osd_request_target *t, 4394 const struct ceph_hobject_id *begin, 4395 const struct ceph_hobject_id *end) 4396 { 4397 struct ceph_hobject_id hoid; 4398 int cmp; 4399 4400 hoid_fill_from_target(&hoid, t); 4401 cmp = hoid_compare(&hoid, begin); 4402 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0); 4403 } 4404 4405 static void handle_backoff_unblock(struct ceph_osd *osd, 4406 const struct MOSDBackoff *m) 4407 { 4408 struct ceph_spg_mapping *spg; 4409 struct ceph_osd_backoff *backoff; 4410 struct rb_node *n; 4411 4412 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4413 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4414 4415 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id); 4416 if (!backoff) { 4417 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n", 4418 __func__, osd->o_osd, m->spgid.pgid.pool, 4419 m->spgid.pgid.seed, m->spgid.shard, m->id); 4420 return; 4421 } 4422 4423 if (hoid_compare(backoff->begin, m->begin) && 4424 hoid_compare(backoff->end, m->end)) { 4425 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n", 4426 __func__, osd->o_osd, m->spgid.pgid.pool, 4427 m->spgid.pgid.seed, m->spgid.shard, m->id); 4428 /* unblock it anyway... */ 4429 } 4430 4431 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid); 4432 BUG_ON(!spg); 4433 4434 erase_backoff(&spg->backoffs, backoff); 4435 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4436 free_backoff(backoff); 4437 4438 if (RB_EMPTY_ROOT(&spg->backoffs)) { 4439 erase_spg_mapping(&osd->o_backoff_mappings, spg); 4440 free_spg_mapping(spg); 4441 } 4442 4443 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 4444 struct ceph_osd_request *req = 4445 rb_entry(n, struct ceph_osd_request, r_node); 4446 4447 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) { 4448 /* 4449 * Match against @m, not @backoff -- the PG may 4450 * have split on the OSD. 4451 */ 4452 if (target_contained_by(&req->r_t, m->begin, m->end)) { 4453 /* 4454 * If no other installed backoff applies, 4455 * resend. 4456 */ 4457 send_request(req); 4458 } 4459 } 4460 } 4461 } 4462 4463 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg) 4464 { 4465 struct ceph_osd_client *osdc = osd->o_osdc; 4466 struct MOSDBackoff m; 4467 int ret; 4468 4469 down_read(&osdc->lock); 4470 if (!osd_registered(osd)) { 4471 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4472 up_read(&osdc->lock); 4473 return; 4474 } 4475 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 4476 4477 mutex_lock(&osd->lock); 4478 ret = decode_MOSDBackoff(msg, &m); 4479 if (ret) { 4480 pr_err("failed to decode MOSDBackoff: %d\n", ret); 4481 ceph_msg_dump(msg); 4482 goto out_unlock; 4483 } 4484 4485 switch (m.op) { 4486 case CEPH_OSD_BACKOFF_OP_BLOCK: 4487 handle_backoff_block(osd, &m); 4488 break; 4489 case CEPH_OSD_BACKOFF_OP_UNBLOCK: 4490 handle_backoff_unblock(osd, &m); 4491 break; 4492 default: 4493 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op); 4494 } 4495 4496 free_hoid(m.begin); 4497 free_hoid(m.end); 4498 4499 out_unlock: 4500 mutex_unlock(&osd->lock); 4501 up_read(&osdc->lock); 4502 } 4503 4504 /* 4505 * Process osd watch notifications 4506 */ 4507 static void handle_watch_notify(struct ceph_osd_client *osdc, 4508 struct ceph_msg *msg) 4509 { 4510 void *p = msg->front.iov_base; 4511 void *const end = p + msg->front.iov_len; 4512 struct ceph_osd_linger_request *lreq; 4513 struct linger_work *lwork; 4514 u8 proto_ver, opcode; 4515 u64 cookie, notify_id; 4516 u64 notifier_id = 0; 4517 s32 return_code = 0; 4518 void *payload = NULL; 4519 u32 payload_len = 0; 4520 4521 ceph_decode_8_safe(&p, end, proto_ver, bad); 4522 ceph_decode_8_safe(&p, end, opcode, bad); 4523 ceph_decode_64_safe(&p, end, cookie, bad); 4524 p += 8; /* skip ver */ 4525 ceph_decode_64_safe(&p, end, notify_id, bad); 4526 4527 if (proto_ver >= 1) { 4528 ceph_decode_32_safe(&p, end, payload_len, bad); 4529 ceph_decode_need(&p, end, payload_len, bad); 4530 payload = p; 4531 p += payload_len; 4532 } 4533 4534 if (le16_to_cpu(msg->hdr.version) >= 2) 4535 ceph_decode_32_safe(&p, end, return_code, bad); 4536 4537 if (le16_to_cpu(msg->hdr.version) >= 3) 4538 ceph_decode_64_safe(&p, end, notifier_id, bad); 4539 4540 down_read(&osdc->lock); 4541 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 4542 if (!lreq) { 4543 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 4544 cookie); 4545 goto out_unlock_osdc; 4546 } 4547 4548 mutex_lock(&lreq->lock); 4549 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 4550 opcode, cookie, lreq, lreq->is_watch); 4551 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 4552 if (!lreq->last_error) { 4553 lreq->last_error = -ENOTCONN; 4554 queue_watch_error(lreq); 4555 } 4556 } else if (!lreq->is_watch) { 4557 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 4558 if (lreq->notify_id && lreq->notify_id != notify_id) { 4559 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 4560 lreq->notify_id, notify_id); 4561 } else if (!completion_done(&lreq->notify_finish_wait)) { 4562 struct ceph_msg_data *data = 4563 msg->num_data_items ? &msg->data[0] : NULL; 4564 4565 if (data) { 4566 if (lreq->preply_pages) { 4567 WARN_ON(data->type != 4568 CEPH_MSG_DATA_PAGES); 4569 *lreq->preply_pages = data->pages; 4570 *lreq->preply_len = data->length; 4571 data->own_pages = false; 4572 } 4573 } 4574 lreq->notify_finish_error = return_code; 4575 complete_all(&lreq->notify_finish_wait); 4576 } 4577 } else { 4578 /* CEPH_WATCH_EVENT_NOTIFY */ 4579 lwork = lwork_alloc(lreq, do_watch_notify); 4580 if (!lwork) { 4581 pr_err("failed to allocate notify-lwork\n"); 4582 goto out_unlock_lreq; 4583 } 4584 4585 lwork->notify.notify_id = notify_id; 4586 lwork->notify.notifier_id = notifier_id; 4587 lwork->notify.payload = payload; 4588 lwork->notify.payload_len = payload_len; 4589 lwork->notify.msg = ceph_msg_get(msg); 4590 lwork_queue(lwork); 4591 } 4592 4593 out_unlock_lreq: 4594 mutex_unlock(&lreq->lock); 4595 out_unlock_osdc: 4596 up_read(&osdc->lock); 4597 return; 4598 4599 bad: 4600 pr_err("osdc handle_watch_notify corrupt msg\n"); 4601 } 4602 4603 /* 4604 * Register request, send initial attempt. 4605 */ 4606 void ceph_osdc_start_request(struct ceph_osd_client *osdc, 4607 struct ceph_osd_request *req) 4608 { 4609 down_read(&osdc->lock); 4610 submit_request(req, false); 4611 up_read(&osdc->lock); 4612 } 4613 EXPORT_SYMBOL(ceph_osdc_start_request); 4614 4615 /* 4616 * Unregister request. If @req was registered, it isn't completed: 4617 * r_result isn't set and __complete_request() isn't invoked. 4618 * 4619 * If @req wasn't registered, this call may have raced with 4620 * handle_reply(), in which case r_result would already be set and 4621 * __complete_request() would be getting invoked, possibly even 4622 * concurrently with this call. 4623 */ 4624 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 4625 { 4626 struct ceph_osd_client *osdc = req->r_osdc; 4627 4628 down_write(&osdc->lock); 4629 if (req->r_osd) 4630 cancel_request(req); 4631 up_write(&osdc->lock); 4632 } 4633 EXPORT_SYMBOL(ceph_osdc_cancel_request); 4634 4635 /* 4636 * @timeout: in jiffies, 0 means "wait forever" 4637 */ 4638 static int wait_request_timeout(struct ceph_osd_request *req, 4639 unsigned long timeout) 4640 { 4641 long left; 4642 4643 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 4644 left = wait_for_completion_killable_timeout(&req->r_completion, 4645 ceph_timeout_jiffies(timeout)); 4646 if (left <= 0) { 4647 left = left ?: -ETIMEDOUT; 4648 ceph_osdc_cancel_request(req); 4649 } else { 4650 left = req->r_result; /* completed */ 4651 } 4652 4653 return left; 4654 } 4655 4656 /* 4657 * wait for a request to complete 4658 */ 4659 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 4660 struct ceph_osd_request *req) 4661 { 4662 return wait_request_timeout(req, 0); 4663 } 4664 EXPORT_SYMBOL(ceph_osdc_wait_request); 4665 4666 /* 4667 * sync - wait for all in-flight requests to flush. avoid starvation. 4668 */ 4669 void ceph_osdc_sync(struct ceph_osd_client *osdc) 4670 { 4671 struct rb_node *n, *p; 4672 u64 last_tid = atomic64_read(&osdc->last_tid); 4673 4674 again: 4675 down_read(&osdc->lock); 4676 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 4677 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 4678 4679 mutex_lock(&osd->lock); 4680 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 4681 struct ceph_osd_request *req = 4682 rb_entry(p, struct ceph_osd_request, r_node); 4683 4684 if (req->r_tid > last_tid) 4685 break; 4686 4687 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 4688 continue; 4689 4690 ceph_osdc_get_request(req); 4691 mutex_unlock(&osd->lock); 4692 up_read(&osdc->lock); 4693 dout("%s waiting on req %p tid %llu last_tid %llu\n", 4694 __func__, req, req->r_tid, last_tid); 4695 wait_for_completion(&req->r_completion); 4696 ceph_osdc_put_request(req); 4697 goto again; 4698 } 4699 4700 mutex_unlock(&osd->lock); 4701 } 4702 4703 up_read(&osdc->lock); 4704 dout("%s done last_tid %llu\n", __func__, last_tid); 4705 } 4706 EXPORT_SYMBOL(ceph_osdc_sync); 4707 4708 /* 4709 * Returns a handle, caller owns a ref. 4710 */ 4711 struct ceph_osd_linger_request * 4712 ceph_osdc_watch(struct ceph_osd_client *osdc, 4713 struct ceph_object_id *oid, 4714 struct ceph_object_locator *oloc, 4715 rados_watchcb2_t wcb, 4716 rados_watcherrcb_t errcb, 4717 void *data) 4718 { 4719 struct ceph_osd_linger_request *lreq; 4720 int ret; 4721 4722 lreq = linger_alloc(osdc); 4723 if (!lreq) 4724 return ERR_PTR(-ENOMEM); 4725 4726 lreq->is_watch = true; 4727 lreq->wcb = wcb; 4728 lreq->errcb = errcb; 4729 lreq->data = data; 4730 lreq->watch_valid_thru = jiffies; 4731 4732 ceph_oid_copy(&lreq->t.base_oid, oid); 4733 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4734 lreq->t.flags = CEPH_OSD_FLAG_WRITE; 4735 ktime_get_real_ts64(&lreq->mtime); 4736 4737 linger_submit(lreq); 4738 ret = linger_reg_commit_wait(lreq); 4739 if (ret) { 4740 linger_cancel(lreq); 4741 goto err_put_lreq; 4742 } 4743 4744 return lreq; 4745 4746 err_put_lreq: 4747 linger_put(lreq); 4748 return ERR_PTR(ret); 4749 } 4750 EXPORT_SYMBOL(ceph_osdc_watch); 4751 4752 /* 4753 * Releases a ref. 4754 * 4755 * Times out after mount_timeout to preserve rbd unmap behaviour 4756 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 4757 * with mount_timeout"). 4758 */ 4759 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 4760 struct ceph_osd_linger_request *lreq) 4761 { 4762 struct ceph_options *opts = osdc->client->options; 4763 struct ceph_osd_request *req; 4764 int ret; 4765 4766 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4767 if (!req) 4768 return -ENOMEM; 4769 4770 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4771 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4772 req->r_flags = CEPH_OSD_FLAG_WRITE; 4773 ktime_get_real_ts64(&req->r_mtime); 4774 osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_UNWATCH, 4775 lreq->linger_id, 0); 4776 4777 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4778 if (ret) 4779 goto out_put_req; 4780 4781 ceph_osdc_start_request(osdc, req); 4782 linger_cancel(lreq); 4783 linger_put(lreq); 4784 ret = wait_request_timeout(req, opts->mount_timeout); 4785 4786 out_put_req: 4787 ceph_osdc_put_request(req); 4788 return ret; 4789 } 4790 EXPORT_SYMBOL(ceph_osdc_unwatch); 4791 4792 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 4793 u64 notify_id, u64 cookie, void *payload, 4794 u32 payload_len) 4795 { 4796 struct ceph_osd_req_op *op; 4797 struct ceph_pagelist *pl; 4798 int ret; 4799 4800 op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 4801 4802 pl = ceph_pagelist_alloc(GFP_NOIO); 4803 if (!pl) 4804 return -ENOMEM; 4805 4806 ret = ceph_pagelist_encode_64(pl, notify_id); 4807 ret |= ceph_pagelist_encode_64(pl, cookie); 4808 if (payload) { 4809 ret |= ceph_pagelist_encode_32(pl, payload_len); 4810 ret |= ceph_pagelist_append(pl, payload, payload_len); 4811 } else { 4812 ret |= ceph_pagelist_encode_32(pl, 0); 4813 } 4814 if (ret) { 4815 ceph_pagelist_release(pl); 4816 return -ENOMEM; 4817 } 4818 4819 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 4820 op->indata_len = pl->length; 4821 return 0; 4822 } 4823 4824 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 4825 struct ceph_object_id *oid, 4826 struct ceph_object_locator *oloc, 4827 u64 notify_id, 4828 u64 cookie, 4829 void *payload, 4830 u32 payload_len) 4831 { 4832 struct ceph_osd_request *req; 4833 int ret; 4834 4835 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4836 if (!req) 4837 return -ENOMEM; 4838 4839 ceph_oid_copy(&req->r_base_oid, oid); 4840 ceph_oloc_copy(&req->r_base_oloc, oloc); 4841 req->r_flags = CEPH_OSD_FLAG_READ; 4842 4843 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 4844 payload_len); 4845 if (ret) 4846 goto out_put_req; 4847 4848 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4849 if (ret) 4850 goto out_put_req; 4851 4852 ceph_osdc_start_request(osdc, req); 4853 ret = ceph_osdc_wait_request(osdc, req); 4854 4855 out_put_req: 4856 ceph_osdc_put_request(req); 4857 return ret; 4858 } 4859 EXPORT_SYMBOL(ceph_osdc_notify_ack); 4860 4861 /* 4862 * @timeout: in seconds 4863 * 4864 * @preply_{pages,len} are initialized both on success and error. 4865 * The caller is responsible for: 4866 * 4867 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 4868 */ 4869 int ceph_osdc_notify(struct ceph_osd_client *osdc, 4870 struct ceph_object_id *oid, 4871 struct ceph_object_locator *oloc, 4872 void *payload, 4873 u32 payload_len, 4874 u32 timeout, 4875 struct page ***preply_pages, 4876 size_t *preply_len) 4877 { 4878 struct ceph_osd_linger_request *lreq; 4879 int ret; 4880 4881 WARN_ON(!timeout); 4882 if (preply_pages) { 4883 *preply_pages = NULL; 4884 *preply_len = 0; 4885 } 4886 4887 lreq = linger_alloc(osdc); 4888 if (!lreq) 4889 return -ENOMEM; 4890 4891 lreq->request_pl = ceph_pagelist_alloc(GFP_NOIO); 4892 if (!lreq->request_pl) { 4893 ret = -ENOMEM; 4894 goto out_put_lreq; 4895 } 4896 4897 ret = ceph_pagelist_encode_32(lreq->request_pl, 1); /* prot_ver */ 4898 ret |= ceph_pagelist_encode_32(lreq->request_pl, timeout); 4899 ret |= ceph_pagelist_encode_32(lreq->request_pl, payload_len); 4900 ret |= ceph_pagelist_append(lreq->request_pl, payload, payload_len); 4901 if (ret) { 4902 ret = -ENOMEM; 4903 goto out_put_lreq; 4904 } 4905 4906 /* for notify_id */ 4907 lreq->notify_id_pages = ceph_alloc_page_vector(1, GFP_NOIO); 4908 if (IS_ERR(lreq->notify_id_pages)) { 4909 ret = PTR_ERR(lreq->notify_id_pages); 4910 lreq->notify_id_pages = NULL; 4911 goto out_put_lreq; 4912 } 4913 4914 lreq->preply_pages = preply_pages; 4915 lreq->preply_len = preply_len; 4916 4917 ceph_oid_copy(&lreq->t.base_oid, oid); 4918 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4919 lreq->t.flags = CEPH_OSD_FLAG_READ; 4920 4921 linger_submit(lreq); 4922 ret = linger_reg_commit_wait(lreq); 4923 if (!ret) 4924 ret = linger_notify_finish_wait(lreq, 4925 msecs_to_jiffies(2 * timeout * MSEC_PER_SEC)); 4926 else 4927 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 4928 4929 linger_cancel(lreq); 4930 out_put_lreq: 4931 linger_put(lreq); 4932 return ret; 4933 } 4934 EXPORT_SYMBOL(ceph_osdc_notify); 4935 4936 /* 4937 * Return the number of milliseconds since the watch was last 4938 * confirmed, or an error. If there is an error, the watch is no 4939 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 4940 */ 4941 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 4942 struct ceph_osd_linger_request *lreq) 4943 { 4944 unsigned long stamp, age; 4945 int ret; 4946 4947 down_read(&osdc->lock); 4948 mutex_lock(&lreq->lock); 4949 stamp = lreq->watch_valid_thru; 4950 if (!list_empty(&lreq->pending_lworks)) { 4951 struct linger_work *lwork = 4952 list_first_entry(&lreq->pending_lworks, 4953 struct linger_work, 4954 pending_item); 4955 4956 if (time_before(lwork->queued_stamp, stamp)) 4957 stamp = lwork->queued_stamp; 4958 } 4959 age = jiffies - stamp; 4960 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 4961 lreq, lreq->linger_id, age, lreq->last_error); 4962 /* we are truncating to msecs, so return a safe upper bound */ 4963 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 4964 4965 mutex_unlock(&lreq->lock); 4966 up_read(&osdc->lock); 4967 return ret; 4968 } 4969 4970 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 4971 { 4972 u8 struct_v; 4973 u32 struct_len; 4974 int ret; 4975 4976 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 4977 &struct_v, &struct_len); 4978 if (ret) 4979 goto bad; 4980 4981 ret = -EINVAL; 4982 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad); 4983 ceph_decode_64_safe(p, end, item->cookie, bad); 4984 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */ 4985 4986 if (struct_v >= 2) { 4987 ret = ceph_decode_entity_addr(p, end, &item->addr); 4988 if (ret) 4989 goto bad; 4990 } else { 4991 ret = 0; 4992 } 4993 4994 dout("%s %s%llu cookie %llu addr %s\n", __func__, 4995 ENTITY_NAME(item->name), item->cookie, 4996 ceph_pr_addr(&item->addr)); 4997 bad: 4998 return ret; 4999 } 5000 5001 static int decode_watchers(void **p, void *end, 5002 struct ceph_watch_item **watchers, 5003 u32 *num_watchers) 5004 { 5005 u8 struct_v; 5006 u32 struct_len; 5007 int i; 5008 int ret; 5009 5010 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 5011 &struct_v, &struct_len); 5012 if (ret) 5013 return ret; 5014 5015 *num_watchers = ceph_decode_32(p); 5016 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 5017 if (!*watchers) 5018 return -ENOMEM; 5019 5020 for (i = 0; i < *num_watchers; i++) { 5021 ret = decode_watcher(p, end, *watchers + i); 5022 if (ret) { 5023 kfree(*watchers); 5024 return ret; 5025 } 5026 } 5027 5028 return 0; 5029 } 5030 5031 /* 5032 * On success, the caller is responsible for: 5033 * 5034 * kfree(watchers); 5035 */ 5036 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 5037 struct ceph_object_id *oid, 5038 struct ceph_object_locator *oloc, 5039 struct ceph_watch_item **watchers, 5040 u32 *num_watchers) 5041 { 5042 struct ceph_osd_request *req; 5043 struct page **pages; 5044 int ret; 5045 5046 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 5047 if (!req) 5048 return -ENOMEM; 5049 5050 ceph_oid_copy(&req->r_base_oid, oid); 5051 ceph_oloc_copy(&req->r_base_oloc, oloc); 5052 req->r_flags = CEPH_OSD_FLAG_READ; 5053 5054 pages = ceph_alloc_page_vector(1, GFP_NOIO); 5055 if (IS_ERR(pages)) { 5056 ret = PTR_ERR(pages); 5057 goto out_put_req; 5058 } 5059 5060 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 5061 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 5062 response_data), 5063 pages, PAGE_SIZE, 0, false, true); 5064 5065 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 5066 if (ret) 5067 goto out_put_req; 5068 5069 ceph_osdc_start_request(osdc, req); 5070 ret = ceph_osdc_wait_request(osdc, req); 5071 if (ret >= 0) { 5072 void *p = page_address(pages[0]); 5073 void *const end = p + req->r_ops[0].outdata_len; 5074 5075 ret = decode_watchers(&p, end, watchers, num_watchers); 5076 } 5077 5078 out_put_req: 5079 ceph_osdc_put_request(req); 5080 return ret; 5081 } 5082 EXPORT_SYMBOL(ceph_osdc_list_watchers); 5083 5084 /* 5085 * Call all pending notify callbacks - for use after a watch is 5086 * unregistered, to make sure no more callbacks for it will be invoked 5087 */ 5088 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 5089 { 5090 dout("%s osdc %p\n", __func__, osdc); 5091 flush_workqueue(osdc->notify_wq); 5092 } 5093 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 5094 5095 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 5096 { 5097 down_read(&osdc->lock); 5098 maybe_request_map(osdc); 5099 up_read(&osdc->lock); 5100 } 5101 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 5102 5103 /* 5104 * Execute an OSD class method on an object. 5105 * 5106 * @flags: CEPH_OSD_FLAG_* 5107 * @resp_len: in/out param for reply length 5108 */ 5109 int ceph_osdc_call(struct ceph_osd_client *osdc, 5110 struct ceph_object_id *oid, 5111 struct ceph_object_locator *oloc, 5112 const char *class, const char *method, 5113 unsigned int flags, 5114 struct page *req_page, size_t req_len, 5115 struct page **resp_pages, size_t *resp_len) 5116 { 5117 struct ceph_osd_request *req; 5118 int ret; 5119 5120 if (req_len > PAGE_SIZE) 5121 return -E2BIG; 5122 5123 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 5124 if (!req) 5125 return -ENOMEM; 5126 5127 ceph_oid_copy(&req->r_base_oid, oid); 5128 ceph_oloc_copy(&req->r_base_oloc, oloc); 5129 req->r_flags = flags; 5130 5131 ret = osd_req_op_cls_init(req, 0, class, method); 5132 if (ret) 5133 goto out_put_req; 5134 5135 if (req_page) 5136 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 5137 0, false, false); 5138 if (resp_pages) 5139 osd_req_op_cls_response_data_pages(req, 0, resp_pages, 5140 *resp_len, 0, false, false); 5141 5142 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 5143 if (ret) 5144 goto out_put_req; 5145 5146 ceph_osdc_start_request(osdc, req); 5147 ret = ceph_osdc_wait_request(osdc, req); 5148 if (ret >= 0) { 5149 ret = req->r_ops[0].rval; 5150 if (resp_pages) 5151 *resp_len = req->r_ops[0].outdata_len; 5152 } 5153 5154 out_put_req: 5155 ceph_osdc_put_request(req); 5156 return ret; 5157 } 5158 EXPORT_SYMBOL(ceph_osdc_call); 5159 5160 /* 5161 * reset all osd connections 5162 */ 5163 void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc) 5164 { 5165 struct rb_node *n; 5166 5167 down_write(&osdc->lock); 5168 for (n = rb_first(&osdc->osds); n; ) { 5169 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 5170 5171 n = rb_next(n); 5172 if (!reopen_osd(osd)) 5173 kick_osd_requests(osd); 5174 } 5175 up_write(&osdc->lock); 5176 } 5177 5178 /* 5179 * init, shutdown 5180 */ 5181 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 5182 { 5183 int err; 5184 5185 dout("init\n"); 5186 osdc->client = client; 5187 init_rwsem(&osdc->lock); 5188 osdc->osds = RB_ROOT; 5189 INIT_LIST_HEAD(&osdc->osd_lru); 5190 spin_lock_init(&osdc->osd_lru_lock); 5191 osd_init(&osdc->homeless_osd); 5192 osdc->homeless_osd.o_osdc = osdc; 5193 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 5194 osdc->last_linger_id = CEPH_LINGER_ID_START; 5195 osdc->linger_requests = RB_ROOT; 5196 osdc->map_checks = RB_ROOT; 5197 osdc->linger_map_checks = RB_ROOT; 5198 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 5199 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 5200 5201 err = -ENOMEM; 5202 osdc->osdmap = ceph_osdmap_alloc(); 5203 if (!osdc->osdmap) 5204 goto out; 5205 5206 osdc->req_mempool = mempool_create_slab_pool(10, 5207 ceph_osd_request_cache); 5208 if (!osdc->req_mempool) 5209 goto out_map; 5210 5211 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 5212 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op"); 5213 if (err < 0) 5214 goto out_mempool; 5215 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 5216 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, 5217 "osd_op_reply"); 5218 if (err < 0) 5219 goto out_msgpool; 5220 5221 err = -ENOMEM; 5222 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 5223 if (!osdc->notify_wq) 5224 goto out_msgpool_reply; 5225 5226 osdc->completion_wq = create_singlethread_workqueue("ceph-completion"); 5227 if (!osdc->completion_wq) 5228 goto out_notify_wq; 5229 5230 schedule_delayed_work(&osdc->timeout_work, 5231 osdc->client->options->osd_keepalive_timeout); 5232 schedule_delayed_work(&osdc->osds_timeout_work, 5233 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 5234 5235 return 0; 5236 5237 out_notify_wq: 5238 destroy_workqueue(osdc->notify_wq); 5239 out_msgpool_reply: 5240 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5241 out_msgpool: 5242 ceph_msgpool_destroy(&osdc->msgpool_op); 5243 out_mempool: 5244 mempool_destroy(osdc->req_mempool); 5245 out_map: 5246 ceph_osdmap_destroy(osdc->osdmap); 5247 out: 5248 return err; 5249 } 5250 5251 void ceph_osdc_stop(struct ceph_osd_client *osdc) 5252 { 5253 destroy_workqueue(osdc->completion_wq); 5254 destroy_workqueue(osdc->notify_wq); 5255 cancel_delayed_work_sync(&osdc->timeout_work); 5256 cancel_delayed_work_sync(&osdc->osds_timeout_work); 5257 5258 down_write(&osdc->lock); 5259 while (!RB_EMPTY_ROOT(&osdc->osds)) { 5260 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 5261 struct ceph_osd, o_node); 5262 close_osd(osd); 5263 } 5264 up_write(&osdc->lock); 5265 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1); 5266 osd_cleanup(&osdc->homeless_osd); 5267 5268 WARN_ON(!list_empty(&osdc->osd_lru)); 5269 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 5270 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 5271 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 5272 WARN_ON(atomic_read(&osdc->num_requests)); 5273 WARN_ON(atomic_read(&osdc->num_homeless)); 5274 5275 ceph_osdmap_destroy(osdc->osdmap); 5276 mempool_destroy(osdc->req_mempool); 5277 ceph_msgpool_destroy(&osdc->msgpool_op); 5278 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5279 } 5280 5281 int osd_req_op_copy_from_init(struct ceph_osd_request *req, 5282 u64 src_snapid, u64 src_version, 5283 struct ceph_object_id *src_oid, 5284 struct ceph_object_locator *src_oloc, 5285 u32 src_fadvise_flags, 5286 u32 dst_fadvise_flags, 5287 u32 truncate_seq, u64 truncate_size, 5288 u8 copy_from_flags) 5289 { 5290 struct ceph_osd_req_op *op; 5291 struct page **pages; 5292 void *p, *end; 5293 5294 pages = ceph_alloc_page_vector(1, GFP_KERNEL); 5295 if (IS_ERR(pages)) 5296 return PTR_ERR(pages); 5297 5298 op = osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2, 5299 dst_fadvise_flags); 5300 op->copy_from.snapid = src_snapid; 5301 op->copy_from.src_version = src_version; 5302 op->copy_from.flags = copy_from_flags; 5303 op->copy_from.src_fadvise_flags = src_fadvise_flags; 5304 5305 p = page_address(pages[0]); 5306 end = p + PAGE_SIZE; 5307 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len); 5308 encode_oloc(&p, end, src_oloc); 5309 ceph_encode_32(&p, truncate_seq); 5310 ceph_encode_64(&p, truncate_size); 5311 op->indata_len = PAGE_SIZE - (end - p); 5312 5313 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages, 5314 op->indata_len, 0, false, true); 5315 return 0; 5316 } 5317 EXPORT_SYMBOL(osd_req_op_copy_from_init); 5318 5319 int __init ceph_osdc_setup(void) 5320 { 5321 size_t size = sizeof(struct ceph_osd_request) + 5322 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 5323 5324 BUG_ON(ceph_osd_request_cache); 5325 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 5326 0, 0, NULL); 5327 5328 return ceph_osd_request_cache ? 0 : -ENOMEM; 5329 } 5330 5331 void ceph_osdc_cleanup(void) 5332 { 5333 BUG_ON(!ceph_osd_request_cache); 5334 kmem_cache_destroy(ceph_osd_request_cache); 5335 ceph_osd_request_cache = NULL; 5336 } 5337 5338 /* 5339 * handle incoming message 5340 */ 5341 static void osd_dispatch(struct ceph_connection *con, struct ceph_msg *msg) 5342 { 5343 struct ceph_osd *osd = con->private; 5344 struct ceph_osd_client *osdc = osd->o_osdc; 5345 int type = le16_to_cpu(msg->hdr.type); 5346 5347 switch (type) { 5348 case CEPH_MSG_OSD_MAP: 5349 ceph_osdc_handle_map(osdc, msg); 5350 break; 5351 case CEPH_MSG_OSD_OPREPLY: 5352 handle_reply(osd, msg); 5353 break; 5354 case CEPH_MSG_OSD_BACKOFF: 5355 handle_backoff(osd, msg); 5356 break; 5357 case CEPH_MSG_WATCH_NOTIFY: 5358 handle_watch_notify(osdc, msg); 5359 break; 5360 5361 default: 5362 pr_err("received unknown message type %d %s\n", type, 5363 ceph_msg_type_name(type)); 5364 } 5365 5366 ceph_msg_put(msg); 5367 } 5368 5369 /* 5370 * Lookup and return message for incoming reply. Don't try to do 5371 * anything about a larger than preallocated data portion of the 5372 * message at the moment - for now, just skip the message. 5373 */ 5374 static struct ceph_msg *get_reply(struct ceph_connection *con, 5375 struct ceph_msg_header *hdr, 5376 int *skip) 5377 { 5378 struct ceph_osd *osd = con->private; 5379 struct ceph_osd_client *osdc = osd->o_osdc; 5380 struct ceph_msg *m = NULL; 5381 struct ceph_osd_request *req; 5382 int front_len = le32_to_cpu(hdr->front_len); 5383 int data_len = le32_to_cpu(hdr->data_len); 5384 u64 tid = le64_to_cpu(hdr->tid); 5385 5386 down_read(&osdc->lock); 5387 if (!osd_registered(osd)) { 5388 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 5389 *skip = 1; 5390 goto out_unlock_osdc; 5391 } 5392 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 5393 5394 mutex_lock(&osd->lock); 5395 req = lookup_request(&osd->o_requests, tid); 5396 if (!req) { 5397 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 5398 osd->o_osd, tid); 5399 *skip = 1; 5400 goto out_unlock_session; 5401 } 5402 5403 ceph_msg_revoke_incoming(req->r_reply); 5404 5405 if (front_len > req->r_reply->front_alloc_len) { 5406 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 5407 __func__, osd->o_osd, req->r_tid, front_len, 5408 req->r_reply->front_alloc_len); 5409 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 5410 false); 5411 if (!m) 5412 goto out_unlock_session; 5413 ceph_msg_put(req->r_reply); 5414 req->r_reply = m; 5415 } 5416 5417 if (data_len > req->r_reply->data_length) { 5418 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 5419 __func__, osd->o_osd, req->r_tid, data_len, 5420 req->r_reply->data_length); 5421 m = NULL; 5422 *skip = 1; 5423 goto out_unlock_session; 5424 } 5425 5426 m = ceph_msg_get(req->r_reply); 5427 dout("get_reply tid %lld %p\n", tid, m); 5428 5429 out_unlock_session: 5430 mutex_unlock(&osd->lock); 5431 out_unlock_osdc: 5432 up_read(&osdc->lock); 5433 return m; 5434 } 5435 5436 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 5437 { 5438 struct ceph_msg *m; 5439 int type = le16_to_cpu(hdr->type); 5440 u32 front_len = le32_to_cpu(hdr->front_len); 5441 u32 data_len = le32_to_cpu(hdr->data_len); 5442 5443 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false); 5444 if (!m) 5445 return NULL; 5446 5447 if (data_len) { 5448 struct page **pages; 5449 5450 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 5451 GFP_NOIO); 5452 if (IS_ERR(pages)) { 5453 ceph_msg_put(m); 5454 return NULL; 5455 } 5456 5457 ceph_msg_data_add_pages(m, pages, data_len, 0, true); 5458 } 5459 5460 return m; 5461 } 5462 5463 static struct ceph_msg *osd_alloc_msg(struct ceph_connection *con, 5464 struct ceph_msg_header *hdr, 5465 int *skip) 5466 { 5467 struct ceph_osd *osd = con->private; 5468 int type = le16_to_cpu(hdr->type); 5469 5470 *skip = 0; 5471 switch (type) { 5472 case CEPH_MSG_OSD_MAP: 5473 case CEPH_MSG_OSD_BACKOFF: 5474 case CEPH_MSG_WATCH_NOTIFY: 5475 return alloc_msg_with_page_vector(hdr); 5476 case CEPH_MSG_OSD_OPREPLY: 5477 return get_reply(con, hdr, skip); 5478 default: 5479 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 5480 osd->o_osd, type); 5481 *skip = 1; 5482 return NULL; 5483 } 5484 } 5485 5486 /* 5487 * Wrappers to refcount containing ceph_osd struct 5488 */ 5489 static struct ceph_connection *osd_get_con(struct ceph_connection *con) 5490 { 5491 struct ceph_osd *osd = con->private; 5492 if (get_osd(osd)) 5493 return con; 5494 return NULL; 5495 } 5496 5497 static void osd_put_con(struct ceph_connection *con) 5498 { 5499 struct ceph_osd *osd = con->private; 5500 put_osd(osd); 5501 } 5502 5503 /* 5504 * authentication 5505 */ 5506 5507 /* 5508 * Note: returned pointer is the address of a structure that's 5509 * managed separately. Caller must *not* attempt to free it. 5510 */ 5511 static struct ceph_auth_handshake * 5512 osd_get_authorizer(struct ceph_connection *con, int *proto, int force_new) 5513 { 5514 struct ceph_osd *o = con->private; 5515 struct ceph_osd_client *osdc = o->o_osdc; 5516 struct ceph_auth_client *ac = osdc->client->monc.auth; 5517 struct ceph_auth_handshake *auth = &o->o_auth; 5518 int ret; 5519 5520 ret = __ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD, 5521 force_new, proto, NULL, NULL); 5522 if (ret) 5523 return ERR_PTR(ret); 5524 5525 return auth; 5526 } 5527 5528 static int osd_add_authorizer_challenge(struct ceph_connection *con, 5529 void *challenge_buf, int challenge_buf_len) 5530 { 5531 struct ceph_osd *o = con->private; 5532 struct ceph_osd_client *osdc = o->o_osdc; 5533 struct ceph_auth_client *ac = osdc->client->monc.auth; 5534 5535 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer, 5536 challenge_buf, challenge_buf_len); 5537 } 5538 5539 static int osd_verify_authorizer_reply(struct ceph_connection *con) 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 struct ceph_auth_handshake *auth = &o->o_auth; 5545 5546 return ceph_auth_verify_authorizer_reply(ac, auth->authorizer, 5547 auth->authorizer_reply_buf, auth->authorizer_reply_buf_len, 5548 NULL, NULL, NULL, NULL); 5549 } 5550 5551 static int osd_invalidate_authorizer(struct ceph_connection *con) 5552 { 5553 struct ceph_osd *o = con->private; 5554 struct ceph_osd_client *osdc = o->o_osdc; 5555 struct ceph_auth_client *ac = osdc->client->monc.auth; 5556 5557 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 5558 return ceph_monc_validate_auth(&osdc->client->monc); 5559 } 5560 5561 static int osd_get_auth_request(struct ceph_connection *con, 5562 void *buf, int *buf_len, 5563 void **authorizer, int *authorizer_len) 5564 { 5565 struct ceph_osd *o = con->private; 5566 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth; 5567 struct ceph_auth_handshake *auth = &o->o_auth; 5568 int ret; 5569 5570 ret = ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD, 5571 buf, buf_len); 5572 if (ret) 5573 return ret; 5574 5575 *authorizer = auth->authorizer_buf; 5576 *authorizer_len = auth->authorizer_buf_len; 5577 return 0; 5578 } 5579 5580 static int osd_handle_auth_reply_more(struct ceph_connection *con, 5581 void *reply, int reply_len, 5582 void *buf, int *buf_len, 5583 void **authorizer, int *authorizer_len) 5584 { 5585 struct ceph_osd *o = con->private; 5586 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth; 5587 struct ceph_auth_handshake *auth = &o->o_auth; 5588 int ret; 5589 5590 ret = ceph_auth_handle_svc_reply_more(ac, auth, reply, reply_len, 5591 buf, buf_len); 5592 if (ret) 5593 return ret; 5594 5595 *authorizer = auth->authorizer_buf; 5596 *authorizer_len = auth->authorizer_buf_len; 5597 return 0; 5598 } 5599 5600 static int osd_handle_auth_done(struct ceph_connection *con, 5601 u64 global_id, void *reply, int reply_len, 5602 u8 *session_key, int *session_key_len, 5603 u8 *con_secret, int *con_secret_len) 5604 { 5605 struct ceph_osd *o = con->private; 5606 struct ceph_auth_client *ac = o->o_osdc->client->monc.auth; 5607 struct ceph_auth_handshake *auth = &o->o_auth; 5608 5609 return ceph_auth_handle_svc_reply_done(ac, auth, reply, reply_len, 5610 session_key, session_key_len, 5611 con_secret, con_secret_len); 5612 } 5613 5614 static int osd_handle_auth_bad_method(struct ceph_connection *con, 5615 int used_proto, int result, 5616 const int *allowed_protos, int proto_cnt, 5617 const int *allowed_modes, int mode_cnt) 5618 { 5619 struct ceph_osd *o = con->private; 5620 struct ceph_mon_client *monc = &o->o_osdc->client->monc; 5621 int ret; 5622 5623 if (ceph_auth_handle_bad_authorizer(monc->auth, CEPH_ENTITY_TYPE_OSD, 5624 used_proto, result, 5625 allowed_protos, proto_cnt, 5626 allowed_modes, mode_cnt)) { 5627 ret = ceph_monc_validate_auth(monc); 5628 if (ret) 5629 return ret; 5630 } 5631 5632 return -EACCES; 5633 } 5634 5635 static void osd_reencode_message(struct ceph_msg *msg) 5636 { 5637 int type = le16_to_cpu(msg->hdr.type); 5638 5639 if (type == CEPH_MSG_OSD_OP) 5640 encode_request_finish(msg); 5641 } 5642 5643 static int osd_sign_message(struct ceph_msg *msg) 5644 { 5645 struct ceph_osd *o = msg->con->private; 5646 struct ceph_auth_handshake *auth = &o->o_auth; 5647 5648 return ceph_auth_sign_message(auth, msg); 5649 } 5650 5651 static int osd_check_message_signature(struct ceph_msg *msg) 5652 { 5653 struct ceph_osd *o = msg->con->private; 5654 struct ceph_auth_handshake *auth = &o->o_auth; 5655 5656 return ceph_auth_check_message_signature(auth, msg); 5657 } 5658 5659 static const struct ceph_connection_operations osd_con_ops = { 5660 .get = osd_get_con, 5661 .put = osd_put_con, 5662 .alloc_msg = osd_alloc_msg, 5663 .dispatch = osd_dispatch, 5664 .fault = osd_fault, 5665 .reencode_message = osd_reencode_message, 5666 .get_authorizer = osd_get_authorizer, 5667 .add_authorizer_challenge = osd_add_authorizer_challenge, 5668 .verify_authorizer_reply = osd_verify_authorizer_reply, 5669 .invalidate_authorizer = osd_invalidate_authorizer, 5670 .sign_message = osd_sign_message, 5671 .check_message_signature = osd_check_message_signature, 5672 .get_auth_request = osd_get_auth_request, 5673 .handle_auth_reply_more = osd_handle_auth_reply_more, 5674 .handle_auth_done = osd_handle_auth_done, 5675 .handle_auth_bad_method = osd_handle_auth_bad_method, 5676 }; 5677