1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/ceph/ceph_debug.h> 4 5 #include <linux/module.h> 6 #include <linux/err.h> 7 #include <linux/highmem.h> 8 #include <linux/mm.h> 9 #include <linux/pagemap.h> 10 #include <linux/slab.h> 11 #include <linux/uaccess.h> 12 #ifdef CONFIG_BLOCK 13 #include <linux/bio.h> 14 #endif 15 16 #include <linux/ceph/ceph_features.h> 17 #include <linux/ceph/libceph.h> 18 #include <linux/ceph/osd_client.h> 19 #include <linux/ceph/messenger.h> 20 #include <linux/ceph/decode.h> 21 #include <linux/ceph/auth.h> 22 #include <linux/ceph/pagelist.h> 23 #include <linux/ceph/striper.h> 24 25 #define OSD_OPREPLY_FRONT_LEN 512 26 27 static struct kmem_cache *ceph_osd_request_cache; 28 29 static const struct ceph_connection_operations osd_con_ops; 30 31 /* 32 * Implement client access to distributed object storage cluster. 33 * 34 * All data objects are stored within a cluster/cloud of OSDs, or 35 * "object storage devices." (Note that Ceph OSDs have _nothing_ to 36 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply 37 * remote daemons serving up and coordinating consistent and safe 38 * access to storage. 39 * 40 * Cluster membership and the mapping of data objects onto storage devices 41 * are described by the osd map. 42 * 43 * We keep track of pending OSD requests (read, write), resubmit 44 * requests to different OSDs when the cluster topology/data layout 45 * change, or retry the affected requests when the communications 46 * channel with an OSD is reset. 47 */ 48 49 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req); 50 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req); 51 static void link_linger(struct ceph_osd *osd, 52 struct ceph_osd_linger_request *lreq); 53 static void unlink_linger(struct ceph_osd *osd, 54 struct ceph_osd_linger_request *lreq); 55 static void clear_backoffs(struct ceph_osd *osd); 56 57 #if 1 58 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem) 59 { 60 bool wrlocked = true; 61 62 if (unlikely(down_read_trylock(sem))) { 63 wrlocked = false; 64 up_read(sem); 65 } 66 67 return wrlocked; 68 } 69 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) 70 { 71 WARN_ON(!rwsem_is_locked(&osdc->lock)); 72 } 73 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) 74 { 75 WARN_ON(!rwsem_is_wrlocked(&osdc->lock)); 76 } 77 static inline void verify_osd_locked(struct ceph_osd *osd) 78 { 79 struct ceph_osd_client *osdc = osd->o_osdc; 80 81 WARN_ON(!(mutex_is_locked(&osd->lock) && 82 rwsem_is_locked(&osdc->lock)) && 83 !rwsem_is_wrlocked(&osdc->lock)); 84 } 85 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) 86 { 87 WARN_ON(!mutex_is_locked(&lreq->lock)); 88 } 89 #else 90 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { } 91 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { } 92 static inline void verify_osd_locked(struct ceph_osd *osd) { } 93 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { } 94 #endif 95 96 /* 97 * calculate the mapping of a file extent onto an object, and fill out the 98 * request accordingly. shorten extent as necessary if it crosses an 99 * object boundary. 100 * 101 * fill osd op in request message. 102 */ 103 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, 104 u64 *objnum, u64 *objoff, u64 *objlen) 105 { 106 u64 orig_len = *plen; 107 u32 xlen; 108 109 /* object extent? */ 110 ceph_calc_file_object_mapping(layout, off, orig_len, objnum, 111 objoff, &xlen); 112 *objlen = xlen; 113 if (*objlen < orig_len) { 114 *plen = *objlen; 115 dout(" skipping last %llu, final file extent %llu~%llu\n", 116 orig_len - *plen, off, *plen); 117 } 118 119 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); 120 return 0; 121 } 122 123 static void ceph_osd_data_init(struct ceph_osd_data *osd_data) 124 { 125 memset(osd_data, 0, sizeof (*osd_data)); 126 osd_data->type = CEPH_OSD_DATA_TYPE_NONE; 127 } 128 129 /* 130 * Consumes @pages if @own_pages is true. 131 */ 132 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data, 133 struct page **pages, u64 length, u32 alignment, 134 bool pages_from_pool, bool own_pages) 135 { 136 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; 137 osd_data->pages = pages; 138 osd_data->length = length; 139 osd_data->alignment = alignment; 140 osd_data->pages_from_pool = pages_from_pool; 141 osd_data->own_pages = own_pages; 142 } 143 144 /* 145 * Consumes a ref on @pagelist. 146 */ 147 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, 148 struct ceph_pagelist *pagelist) 149 { 150 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST; 151 osd_data->pagelist = pagelist; 152 } 153 154 #ifdef CONFIG_BLOCK 155 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, 156 struct ceph_bio_iter *bio_pos, 157 u32 bio_length) 158 { 159 osd_data->type = CEPH_OSD_DATA_TYPE_BIO; 160 osd_data->bio_pos = *bio_pos; 161 osd_data->bio_length = bio_length; 162 } 163 #endif /* CONFIG_BLOCK */ 164 165 static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data, 166 struct ceph_bvec_iter *bvec_pos, 167 u32 num_bvecs) 168 { 169 osd_data->type = CEPH_OSD_DATA_TYPE_BVECS; 170 osd_data->bvec_pos = *bvec_pos; 171 osd_data->num_bvecs = num_bvecs; 172 } 173 174 static struct ceph_osd_data * 175 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) 176 { 177 BUG_ON(which >= osd_req->r_num_ops); 178 179 return &osd_req->r_ops[which].raw_data_in; 180 } 181 182 struct ceph_osd_data * 183 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, 184 unsigned int which) 185 { 186 return osd_req_op_data(osd_req, which, extent, osd_data); 187 } 188 EXPORT_SYMBOL(osd_req_op_extent_osd_data); 189 190 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, 191 unsigned int which, struct page **pages, 192 u64 length, u32 alignment, 193 bool pages_from_pool, bool own_pages) 194 { 195 struct ceph_osd_data *osd_data; 196 197 osd_data = osd_req_op_raw_data_in(osd_req, which); 198 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 199 pages_from_pool, own_pages); 200 } 201 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); 202 203 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, 204 unsigned int which, struct page **pages, 205 u64 length, u32 alignment, 206 bool pages_from_pool, bool own_pages) 207 { 208 struct ceph_osd_data *osd_data; 209 210 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 211 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 212 pages_from_pool, own_pages); 213 } 214 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); 215 216 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, 217 unsigned int which, struct ceph_pagelist *pagelist) 218 { 219 struct ceph_osd_data *osd_data; 220 221 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 222 ceph_osd_data_pagelist_init(osd_data, pagelist); 223 } 224 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); 225 226 #ifdef CONFIG_BLOCK 227 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 228 unsigned int which, 229 struct ceph_bio_iter *bio_pos, 230 u32 bio_length) 231 { 232 struct ceph_osd_data *osd_data; 233 234 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 235 ceph_osd_data_bio_init(osd_data, bio_pos, bio_length); 236 } 237 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); 238 #endif /* CONFIG_BLOCK */ 239 240 void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req, 241 unsigned int which, 242 struct bio_vec *bvecs, u32 num_bvecs, 243 u32 bytes) 244 { 245 struct ceph_osd_data *osd_data; 246 struct ceph_bvec_iter it = { 247 .bvecs = bvecs, 248 .iter = { .bi_size = bytes }, 249 }; 250 251 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 252 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs); 253 } 254 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs); 255 256 void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req, 257 unsigned int which, 258 struct ceph_bvec_iter *bvec_pos) 259 { 260 struct ceph_osd_data *osd_data; 261 262 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 263 ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0); 264 } 265 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos); 266 267 static void osd_req_op_cls_request_info_pagelist( 268 struct ceph_osd_request *osd_req, 269 unsigned int which, struct ceph_pagelist *pagelist) 270 { 271 struct ceph_osd_data *osd_data; 272 273 osd_data = osd_req_op_data(osd_req, which, cls, request_info); 274 ceph_osd_data_pagelist_init(osd_data, pagelist); 275 } 276 277 void osd_req_op_cls_request_data_pagelist( 278 struct ceph_osd_request *osd_req, 279 unsigned int which, struct ceph_pagelist *pagelist) 280 { 281 struct ceph_osd_data *osd_data; 282 283 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 284 ceph_osd_data_pagelist_init(osd_data, pagelist); 285 osd_req->r_ops[which].cls.indata_len += pagelist->length; 286 osd_req->r_ops[which].indata_len += pagelist->length; 287 } 288 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); 289 290 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, 291 unsigned int which, struct page **pages, u64 length, 292 u32 alignment, bool pages_from_pool, bool own_pages) 293 { 294 struct ceph_osd_data *osd_data; 295 296 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 297 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 298 pages_from_pool, own_pages); 299 osd_req->r_ops[which].cls.indata_len += length; 300 osd_req->r_ops[which].indata_len += length; 301 } 302 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); 303 304 void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req, 305 unsigned int which, 306 struct bio_vec *bvecs, u32 num_bvecs, 307 u32 bytes) 308 { 309 struct ceph_osd_data *osd_data; 310 struct ceph_bvec_iter it = { 311 .bvecs = bvecs, 312 .iter = { .bi_size = bytes }, 313 }; 314 315 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 316 ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs); 317 osd_req->r_ops[which].cls.indata_len += bytes; 318 osd_req->r_ops[which].indata_len += bytes; 319 } 320 EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs); 321 322 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, 323 unsigned int which, struct page **pages, u64 length, 324 u32 alignment, bool pages_from_pool, bool own_pages) 325 { 326 struct ceph_osd_data *osd_data; 327 328 osd_data = osd_req_op_data(osd_req, which, cls, response_data); 329 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 330 pages_from_pool, own_pages); 331 } 332 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); 333 334 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) 335 { 336 switch (osd_data->type) { 337 case CEPH_OSD_DATA_TYPE_NONE: 338 return 0; 339 case CEPH_OSD_DATA_TYPE_PAGES: 340 return osd_data->length; 341 case CEPH_OSD_DATA_TYPE_PAGELIST: 342 return (u64)osd_data->pagelist->length; 343 #ifdef CONFIG_BLOCK 344 case CEPH_OSD_DATA_TYPE_BIO: 345 return (u64)osd_data->bio_length; 346 #endif /* CONFIG_BLOCK */ 347 case CEPH_OSD_DATA_TYPE_BVECS: 348 return osd_data->bvec_pos.iter.bi_size; 349 default: 350 WARN(true, "unrecognized data type %d\n", (int)osd_data->type); 351 return 0; 352 } 353 } 354 355 static void ceph_osd_data_release(struct ceph_osd_data *osd_data) 356 { 357 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { 358 int num_pages; 359 360 num_pages = calc_pages_for((u64)osd_data->alignment, 361 (u64)osd_data->length); 362 ceph_release_page_vector(osd_data->pages, num_pages); 363 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 364 ceph_pagelist_release(osd_data->pagelist); 365 } 366 ceph_osd_data_init(osd_data); 367 } 368 369 static void osd_req_op_data_release(struct ceph_osd_request *osd_req, 370 unsigned int which) 371 { 372 struct ceph_osd_req_op *op; 373 374 BUG_ON(which >= osd_req->r_num_ops); 375 op = &osd_req->r_ops[which]; 376 377 switch (op->op) { 378 case CEPH_OSD_OP_READ: 379 case CEPH_OSD_OP_WRITE: 380 case CEPH_OSD_OP_WRITEFULL: 381 ceph_osd_data_release(&op->extent.osd_data); 382 break; 383 case CEPH_OSD_OP_CALL: 384 ceph_osd_data_release(&op->cls.request_info); 385 ceph_osd_data_release(&op->cls.request_data); 386 ceph_osd_data_release(&op->cls.response_data); 387 break; 388 case CEPH_OSD_OP_SETXATTR: 389 case CEPH_OSD_OP_CMPXATTR: 390 ceph_osd_data_release(&op->xattr.osd_data); 391 break; 392 case CEPH_OSD_OP_STAT: 393 ceph_osd_data_release(&op->raw_data_in); 394 break; 395 case CEPH_OSD_OP_NOTIFY_ACK: 396 ceph_osd_data_release(&op->notify_ack.request_data); 397 break; 398 case CEPH_OSD_OP_NOTIFY: 399 ceph_osd_data_release(&op->notify.request_data); 400 ceph_osd_data_release(&op->notify.response_data); 401 break; 402 case CEPH_OSD_OP_LIST_WATCHERS: 403 ceph_osd_data_release(&op->list_watchers.response_data); 404 break; 405 case CEPH_OSD_OP_COPY_FROM2: 406 ceph_osd_data_release(&op->copy_from.osd_data); 407 break; 408 default: 409 break; 410 } 411 } 412 413 /* 414 * Assumes @t is zero-initialized. 415 */ 416 static void target_init(struct ceph_osd_request_target *t) 417 { 418 ceph_oid_init(&t->base_oid); 419 ceph_oloc_init(&t->base_oloc); 420 ceph_oid_init(&t->target_oid); 421 ceph_oloc_init(&t->target_oloc); 422 423 ceph_osds_init(&t->acting); 424 ceph_osds_init(&t->up); 425 t->size = -1; 426 t->min_size = -1; 427 428 t->osd = CEPH_HOMELESS_OSD; 429 } 430 431 static void target_copy(struct ceph_osd_request_target *dest, 432 const struct ceph_osd_request_target *src) 433 { 434 ceph_oid_copy(&dest->base_oid, &src->base_oid); 435 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc); 436 ceph_oid_copy(&dest->target_oid, &src->target_oid); 437 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc); 438 439 dest->pgid = src->pgid; /* struct */ 440 dest->spgid = src->spgid; /* struct */ 441 dest->pg_num = src->pg_num; 442 dest->pg_num_mask = src->pg_num_mask; 443 ceph_osds_copy(&dest->acting, &src->acting); 444 ceph_osds_copy(&dest->up, &src->up); 445 dest->size = src->size; 446 dest->min_size = src->min_size; 447 dest->sort_bitwise = src->sort_bitwise; 448 449 dest->flags = src->flags; 450 dest->paused = src->paused; 451 452 dest->epoch = src->epoch; 453 dest->last_force_resend = src->last_force_resend; 454 455 dest->osd = src->osd; 456 } 457 458 static void target_destroy(struct ceph_osd_request_target *t) 459 { 460 ceph_oid_destroy(&t->base_oid); 461 ceph_oloc_destroy(&t->base_oloc); 462 ceph_oid_destroy(&t->target_oid); 463 ceph_oloc_destroy(&t->target_oloc); 464 } 465 466 /* 467 * requests 468 */ 469 static void request_release_checks(struct ceph_osd_request *req) 470 { 471 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 472 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node)); 473 WARN_ON(!list_empty(&req->r_private_item)); 474 WARN_ON(req->r_osd); 475 } 476 477 static void ceph_osdc_release_request(struct kref *kref) 478 { 479 struct ceph_osd_request *req = container_of(kref, 480 struct ceph_osd_request, r_kref); 481 unsigned int which; 482 483 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 484 req->r_request, req->r_reply); 485 request_release_checks(req); 486 487 if (req->r_request) 488 ceph_msg_put(req->r_request); 489 if (req->r_reply) 490 ceph_msg_put(req->r_reply); 491 492 for (which = 0; which < req->r_num_ops; which++) 493 osd_req_op_data_release(req, which); 494 495 target_destroy(&req->r_t); 496 ceph_put_snap_context(req->r_snapc); 497 498 if (req->r_mempool) 499 mempool_free(req, req->r_osdc->req_mempool); 500 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) 501 kmem_cache_free(ceph_osd_request_cache, req); 502 else 503 kfree(req); 504 } 505 506 void ceph_osdc_get_request(struct ceph_osd_request *req) 507 { 508 dout("%s %p (was %d)\n", __func__, req, 509 kref_read(&req->r_kref)); 510 kref_get(&req->r_kref); 511 } 512 EXPORT_SYMBOL(ceph_osdc_get_request); 513 514 void ceph_osdc_put_request(struct ceph_osd_request *req) 515 { 516 if (req) { 517 dout("%s %p (was %d)\n", __func__, req, 518 kref_read(&req->r_kref)); 519 kref_put(&req->r_kref, ceph_osdc_release_request); 520 } 521 } 522 EXPORT_SYMBOL(ceph_osdc_put_request); 523 524 static void request_init(struct ceph_osd_request *req) 525 { 526 /* req only, each op is zeroed in _osd_req_op_init() */ 527 memset(req, 0, sizeof(*req)); 528 529 kref_init(&req->r_kref); 530 init_completion(&req->r_completion); 531 RB_CLEAR_NODE(&req->r_node); 532 RB_CLEAR_NODE(&req->r_mc_node); 533 INIT_LIST_HEAD(&req->r_private_item); 534 535 target_init(&req->r_t); 536 } 537 538 /* 539 * This is ugly, but it allows us to reuse linger registration and ping 540 * requests, keeping the structure of the code around send_linger{_ping}() 541 * reasonable. Setting up a min_nr=2 mempool for each linger request 542 * and dealing with copying ops (this blasts req only, watch op remains 543 * intact) isn't any better. 544 */ 545 static void request_reinit(struct ceph_osd_request *req) 546 { 547 struct ceph_osd_client *osdc = req->r_osdc; 548 bool mempool = req->r_mempool; 549 unsigned int num_ops = req->r_num_ops; 550 u64 snapid = req->r_snapid; 551 struct ceph_snap_context *snapc = req->r_snapc; 552 bool linger = req->r_linger; 553 struct ceph_msg *request_msg = req->r_request; 554 struct ceph_msg *reply_msg = req->r_reply; 555 556 dout("%s req %p\n", __func__, req); 557 WARN_ON(kref_read(&req->r_kref) != 1); 558 request_release_checks(req); 559 560 WARN_ON(kref_read(&request_msg->kref) != 1); 561 WARN_ON(kref_read(&reply_msg->kref) != 1); 562 target_destroy(&req->r_t); 563 564 request_init(req); 565 req->r_osdc = osdc; 566 req->r_mempool = mempool; 567 req->r_num_ops = num_ops; 568 req->r_snapid = snapid; 569 req->r_snapc = snapc; 570 req->r_linger = linger; 571 req->r_request = request_msg; 572 req->r_reply = reply_msg; 573 } 574 575 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 576 struct ceph_snap_context *snapc, 577 unsigned int num_ops, 578 bool use_mempool, 579 gfp_t gfp_flags) 580 { 581 struct ceph_osd_request *req; 582 583 if (use_mempool) { 584 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 585 req = mempool_alloc(osdc->req_mempool, gfp_flags); 586 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 587 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 588 } else { 589 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 590 req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags); 591 } 592 if (unlikely(!req)) 593 return NULL; 594 595 request_init(req); 596 req->r_osdc = osdc; 597 req->r_mempool = use_mempool; 598 req->r_num_ops = num_ops; 599 req->r_snapid = CEPH_NOSNAP; 600 req->r_snapc = ceph_get_snap_context(snapc); 601 602 dout("%s req %p\n", __func__, req); 603 return req; 604 } 605 EXPORT_SYMBOL(ceph_osdc_alloc_request); 606 607 static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc) 608 { 609 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); 610 } 611 612 static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp, 613 int num_request_data_items, 614 int num_reply_data_items) 615 { 616 struct ceph_osd_client *osdc = req->r_osdc; 617 struct ceph_msg *msg; 618 int msg_size; 619 620 WARN_ON(req->r_request || req->r_reply); 621 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 622 WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); 623 624 /* create request message */ 625 msg_size = CEPH_ENCODING_START_BLK_LEN + 626 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 627 msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */ 628 msg_size += CEPH_ENCODING_START_BLK_LEN + 629 sizeof(struct ceph_osd_reqid); /* reqid */ 630 msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */ 631 msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */ 632 msg_size += CEPH_ENCODING_START_BLK_LEN + 633 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 634 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 635 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 636 msg_size += 8; /* snapid */ 637 msg_size += 8; /* snap_seq */ 638 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 639 msg_size += 4 + 8; /* retry_attempt, features */ 640 641 if (req->r_mempool) 642 msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size, 643 num_request_data_items); 644 else 645 msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size, 646 num_request_data_items, gfp, true); 647 if (!msg) 648 return -ENOMEM; 649 650 memset(msg->front.iov_base, 0, msg->front.iov_len); 651 req->r_request = msg; 652 653 /* create reply message */ 654 msg_size = OSD_OPREPLY_FRONT_LEN; 655 msg_size += req->r_base_oid.name_len; 656 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 657 658 if (req->r_mempool) 659 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, msg_size, 660 num_reply_data_items); 661 else 662 msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size, 663 num_reply_data_items, gfp, true); 664 if (!msg) 665 return -ENOMEM; 666 667 req->r_reply = msg; 668 669 return 0; 670 } 671 672 static bool osd_req_opcode_valid(u16 opcode) 673 { 674 switch (opcode) { 675 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 676 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 677 #undef GENERATE_CASE 678 default: 679 return false; 680 } 681 } 682 683 static void get_num_data_items(struct ceph_osd_request *req, 684 int *num_request_data_items, 685 int *num_reply_data_items) 686 { 687 struct ceph_osd_req_op *op; 688 689 *num_request_data_items = 0; 690 *num_reply_data_items = 0; 691 692 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { 693 switch (op->op) { 694 /* request */ 695 case CEPH_OSD_OP_WRITE: 696 case CEPH_OSD_OP_WRITEFULL: 697 case CEPH_OSD_OP_SETXATTR: 698 case CEPH_OSD_OP_CMPXATTR: 699 case CEPH_OSD_OP_NOTIFY_ACK: 700 case CEPH_OSD_OP_COPY_FROM2: 701 *num_request_data_items += 1; 702 break; 703 704 /* reply */ 705 case CEPH_OSD_OP_STAT: 706 case CEPH_OSD_OP_READ: 707 case CEPH_OSD_OP_LIST_WATCHERS: 708 *num_reply_data_items += 1; 709 break; 710 711 /* both */ 712 case CEPH_OSD_OP_NOTIFY: 713 *num_request_data_items += 1; 714 *num_reply_data_items += 1; 715 break; 716 case CEPH_OSD_OP_CALL: 717 *num_request_data_items += 2; 718 *num_reply_data_items += 1; 719 break; 720 721 default: 722 WARN_ON(!osd_req_opcode_valid(op->op)); 723 break; 724 } 725 } 726 } 727 728 /* 729 * oid, oloc and OSD op opcode(s) must be filled in before this function 730 * is called. 731 */ 732 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 733 { 734 int num_request_data_items, num_reply_data_items; 735 736 get_num_data_items(req, &num_request_data_items, &num_reply_data_items); 737 return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items, 738 num_reply_data_items); 739 } 740 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 741 742 /* 743 * This is an osd op init function for opcodes that have no data or 744 * other information associated with them. It also serves as a 745 * common init routine for all the other init functions, below. 746 */ 747 static struct ceph_osd_req_op * 748 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 749 u16 opcode, u32 flags) 750 { 751 struct ceph_osd_req_op *op; 752 753 BUG_ON(which >= osd_req->r_num_ops); 754 BUG_ON(!osd_req_opcode_valid(opcode)); 755 756 op = &osd_req->r_ops[which]; 757 memset(op, 0, sizeof (*op)); 758 op->op = opcode; 759 op->flags = flags; 760 761 return op; 762 } 763 764 void osd_req_op_init(struct ceph_osd_request *osd_req, 765 unsigned int which, u16 opcode, u32 flags) 766 { 767 (void)_osd_req_op_init(osd_req, which, opcode, flags); 768 } 769 EXPORT_SYMBOL(osd_req_op_init); 770 771 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 772 unsigned int which, u16 opcode, 773 u64 offset, u64 length, 774 u64 truncate_size, u32 truncate_seq) 775 { 776 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 777 opcode, 0); 778 size_t payload_len = 0; 779 780 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 781 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 782 opcode != CEPH_OSD_OP_TRUNCATE); 783 784 op->extent.offset = offset; 785 op->extent.length = length; 786 op->extent.truncate_size = truncate_size; 787 op->extent.truncate_seq = truncate_seq; 788 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 789 payload_len += length; 790 791 op->indata_len = payload_len; 792 } 793 EXPORT_SYMBOL(osd_req_op_extent_init); 794 795 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 796 unsigned int which, u64 length) 797 { 798 struct ceph_osd_req_op *op; 799 u64 previous; 800 801 BUG_ON(which >= osd_req->r_num_ops); 802 op = &osd_req->r_ops[which]; 803 previous = op->extent.length; 804 805 if (length == previous) 806 return; /* Nothing to do */ 807 BUG_ON(length > previous); 808 809 op->extent.length = length; 810 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 811 op->indata_len -= previous - length; 812 } 813 EXPORT_SYMBOL(osd_req_op_extent_update); 814 815 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 816 unsigned int which, u64 offset_inc) 817 { 818 struct ceph_osd_req_op *op, *prev_op; 819 820 BUG_ON(which + 1 >= osd_req->r_num_ops); 821 822 prev_op = &osd_req->r_ops[which]; 823 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 824 /* dup previous one */ 825 op->indata_len = prev_op->indata_len; 826 op->outdata_len = prev_op->outdata_len; 827 op->extent = prev_op->extent; 828 /* adjust offset */ 829 op->extent.offset += offset_inc; 830 op->extent.length -= offset_inc; 831 832 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 833 op->indata_len -= offset_inc; 834 } 835 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 836 837 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 838 const char *class, const char *method) 839 { 840 struct ceph_osd_req_op *op; 841 struct ceph_pagelist *pagelist; 842 size_t payload_len = 0; 843 size_t size; 844 int ret; 845 846 op = _osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0); 847 848 pagelist = ceph_pagelist_alloc(GFP_NOFS); 849 if (!pagelist) 850 return -ENOMEM; 851 852 op->cls.class_name = class; 853 size = strlen(class); 854 BUG_ON(size > (size_t) U8_MAX); 855 op->cls.class_len = size; 856 ret = ceph_pagelist_append(pagelist, class, size); 857 if (ret) 858 goto err_pagelist_free; 859 payload_len += size; 860 861 op->cls.method_name = method; 862 size = strlen(method); 863 BUG_ON(size > (size_t) U8_MAX); 864 op->cls.method_len = size; 865 ret = ceph_pagelist_append(pagelist, method, size); 866 if (ret) 867 goto err_pagelist_free; 868 payload_len += size; 869 870 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 871 op->indata_len = payload_len; 872 return 0; 873 874 err_pagelist_free: 875 ceph_pagelist_release(pagelist); 876 return ret; 877 } 878 EXPORT_SYMBOL(osd_req_op_cls_init); 879 880 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 881 u16 opcode, const char *name, const void *value, 882 size_t size, u8 cmp_op, u8 cmp_mode) 883 { 884 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 885 opcode, 0); 886 struct ceph_pagelist *pagelist; 887 size_t payload_len; 888 int ret; 889 890 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 891 892 pagelist = ceph_pagelist_alloc(GFP_NOFS); 893 if (!pagelist) 894 return -ENOMEM; 895 896 payload_len = strlen(name); 897 op->xattr.name_len = payload_len; 898 ret = ceph_pagelist_append(pagelist, name, payload_len); 899 if (ret) 900 goto err_pagelist_free; 901 902 op->xattr.value_len = size; 903 ret = ceph_pagelist_append(pagelist, value, size); 904 if (ret) 905 goto err_pagelist_free; 906 payload_len += size; 907 908 op->xattr.cmp_op = cmp_op; 909 op->xattr.cmp_mode = cmp_mode; 910 911 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 912 op->indata_len = payload_len; 913 return 0; 914 915 err_pagelist_free: 916 ceph_pagelist_release(pagelist); 917 return ret; 918 } 919 EXPORT_SYMBOL(osd_req_op_xattr_init); 920 921 /* 922 * @watch_opcode: CEPH_OSD_WATCH_OP_* 923 */ 924 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 925 u64 cookie, u8 watch_opcode) 926 { 927 struct ceph_osd_req_op *op; 928 929 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 930 op->watch.cookie = cookie; 931 op->watch.op = watch_opcode; 932 op->watch.gen = 0; 933 } 934 935 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 936 unsigned int which, 937 u64 expected_object_size, 938 u64 expected_write_size) 939 { 940 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 941 CEPH_OSD_OP_SETALLOCHINT, 942 0); 943 944 op->alloc_hint.expected_object_size = expected_object_size; 945 op->alloc_hint.expected_write_size = expected_write_size; 946 947 /* 948 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 949 * not worth a feature bit. Set FAILOK per-op flag to make 950 * sure older osds don't trip over an unsupported opcode. 951 */ 952 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 953 } 954 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 955 956 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 957 struct ceph_osd_data *osd_data) 958 { 959 u64 length = ceph_osd_data_length(osd_data); 960 961 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 962 BUG_ON(length > (u64) SIZE_MAX); 963 if (length) 964 ceph_msg_data_add_pages(msg, osd_data->pages, 965 length, osd_data->alignment, false); 966 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 967 BUG_ON(!length); 968 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 969 #ifdef CONFIG_BLOCK 970 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 971 ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length); 972 #endif 973 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) { 974 ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos); 975 } else { 976 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 977 } 978 } 979 980 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 981 const struct ceph_osd_req_op *src) 982 { 983 switch (src->op) { 984 case CEPH_OSD_OP_STAT: 985 break; 986 case CEPH_OSD_OP_READ: 987 case CEPH_OSD_OP_WRITE: 988 case CEPH_OSD_OP_WRITEFULL: 989 case CEPH_OSD_OP_ZERO: 990 case CEPH_OSD_OP_TRUNCATE: 991 dst->extent.offset = cpu_to_le64(src->extent.offset); 992 dst->extent.length = cpu_to_le64(src->extent.length); 993 dst->extent.truncate_size = 994 cpu_to_le64(src->extent.truncate_size); 995 dst->extent.truncate_seq = 996 cpu_to_le32(src->extent.truncate_seq); 997 break; 998 case CEPH_OSD_OP_CALL: 999 dst->cls.class_len = src->cls.class_len; 1000 dst->cls.method_len = src->cls.method_len; 1001 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 1002 break; 1003 case CEPH_OSD_OP_WATCH: 1004 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 1005 dst->watch.ver = cpu_to_le64(0); 1006 dst->watch.op = src->watch.op; 1007 dst->watch.gen = cpu_to_le32(src->watch.gen); 1008 break; 1009 case CEPH_OSD_OP_NOTIFY_ACK: 1010 break; 1011 case CEPH_OSD_OP_NOTIFY: 1012 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 1013 break; 1014 case CEPH_OSD_OP_LIST_WATCHERS: 1015 break; 1016 case CEPH_OSD_OP_SETALLOCHINT: 1017 dst->alloc_hint.expected_object_size = 1018 cpu_to_le64(src->alloc_hint.expected_object_size); 1019 dst->alloc_hint.expected_write_size = 1020 cpu_to_le64(src->alloc_hint.expected_write_size); 1021 break; 1022 case CEPH_OSD_OP_SETXATTR: 1023 case CEPH_OSD_OP_CMPXATTR: 1024 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 1025 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 1026 dst->xattr.cmp_op = src->xattr.cmp_op; 1027 dst->xattr.cmp_mode = src->xattr.cmp_mode; 1028 break; 1029 case CEPH_OSD_OP_CREATE: 1030 case CEPH_OSD_OP_DELETE: 1031 break; 1032 case CEPH_OSD_OP_COPY_FROM2: 1033 dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid); 1034 dst->copy_from.src_version = 1035 cpu_to_le64(src->copy_from.src_version); 1036 dst->copy_from.flags = src->copy_from.flags; 1037 dst->copy_from.src_fadvise_flags = 1038 cpu_to_le32(src->copy_from.src_fadvise_flags); 1039 break; 1040 default: 1041 pr_err("unsupported osd opcode %s\n", 1042 ceph_osd_op_name(src->op)); 1043 WARN_ON(1); 1044 1045 return 0; 1046 } 1047 1048 dst->op = cpu_to_le16(src->op); 1049 dst->flags = cpu_to_le32(src->flags); 1050 dst->payload_len = cpu_to_le32(src->indata_len); 1051 1052 return src->indata_len; 1053 } 1054 1055 /* 1056 * build new request AND message, calculate layout, and adjust file 1057 * extent as needed. 1058 * 1059 * if the file was recently truncated, we include information about its 1060 * old and new size so that the object can be updated appropriately. (we 1061 * avoid synchronously deleting truncated objects because it's slow.) 1062 */ 1063 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 1064 struct ceph_file_layout *layout, 1065 struct ceph_vino vino, 1066 u64 off, u64 *plen, 1067 unsigned int which, int num_ops, 1068 int opcode, int flags, 1069 struct ceph_snap_context *snapc, 1070 u32 truncate_seq, 1071 u64 truncate_size, 1072 bool use_mempool) 1073 { 1074 struct ceph_osd_request *req; 1075 u64 objnum = 0; 1076 u64 objoff = 0; 1077 u64 objlen = 0; 1078 int r; 1079 1080 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 1081 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 1082 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 1083 1084 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 1085 GFP_NOFS); 1086 if (!req) { 1087 r = -ENOMEM; 1088 goto fail; 1089 } 1090 1091 /* calculate max write size */ 1092 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 1093 if (r) 1094 goto fail; 1095 1096 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 1097 osd_req_op_init(req, which, opcode, 0); 1098 } else { 1099 u32 object_size = layout->object_size; 1100 u32 object_base = off - objoff; 1101 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 1102 if (truncate_size <= object_base) { 1103 truncate_size = 0; 1104 } else { 1105 truncate_size -= object_base; 1106 if (truncate_size > object_size) 1107 truncate_size = object_size; 1108 } 1109 } 1110 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 1111 truncate_size, truncate_seq); 1112 } 1113 1114 req->r_flags = flags; 1115 req->r_base_oloc.pool = layout->pool_id; 1116 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); 1117 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 1118 1119 req->r_snapid = vino.snap; 1120 if (flags & CEPH_OSD_FLAG_WRITE) 1121 req->r_data_offset = off; 1122 1123 if (num_ops > 1) 1124 /* 1125 * This is a special case for ceph_writepages_start(), but it 1126 * also covers ceph_uninline_data(). If more multi-op request 1127 * use cases emerge, we will need a separate helper. 1128 */ 1129 r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0); 1130 else 1131 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 1132 if (r) 1133 goto fail; 1134 1135 return req; 1136 1137 fail: 1138 ceph_osdc_put_request(req); 1139 return ERR_PTR(r); 1140 } 1141 EXPORT_SYMBOL(ceph_osdc_new_request); 1142 1143 /* 1144 * We keep osd requests in an rbtree, sorted by ->r_tid. 1145 */ 1146 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 1147 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 1148 1149 /* 1150 * Call @fn on each OSD request as long as @fn returns 0. 1151 */ 1152 static void for_each_request(struct ceph_osd_client *osdc, 1153 int (*fn)(struct ceph_osd_request *req, void *arg), 1154 void *arg) 1155 { 1156 struct rb_node *n, *p; 1157 1158 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 1159 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 1160 1161 for (p = rb_first(&osd->o_requests); p; ) { 1162 struct ceph_osd_request *req = 1163 rb_entry(p, struct ceph_osd_request, r_node); 1164 1165 p = rb_next(p); 1166 if (fn(req, arg)) 1167 return; 1168 } 1169 } 1170 1171 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 1172 struct ceph_osd_request *req = 1173 rb_entry(p, struct ceph_osd_request, r_node); 1174 1175 p = rb_next(p); 1176 if (fn(req, arg)) 1177 return; 1178 } 1179 } 1180 1181 static bool osd_homeless(struct ceph_osd *osd) 1182 { 1183 return osd->o_osd == CEPH_HOMELESS_OSD; 1184 } 1185 1186 static bool osd_registered(struct ceph_osd *osd) 1187 { 1188 verify_osdc_locked(osd->o_osdc); 1189 1190 return !RB_EMPTY_NODE(&osd->o_node); 1191 } 1192 1193 /* 1194 * Assumes @osd is zero-initialized. 1195 */ 1196 static void osd_init(struct ceph_osd *osd) 1197 { 1198 refcount_set(&osd->o_ref, 1); 1199 RB_CLEAR_NODE(&osd->o_node); 1200 osd->o_requests = RB_ROOT; 1201 osd->o_linger_requests = RB_ROOT; 1202 osd->o_backoff_mappings = RB_ROOT; 1203 osd->o_backoffs_by_id = RB_ROOT; 1204 INIT_LIST_HEAD(&osd->o_osd_lru); 1205 INIT_LIST_HEAD(&osd->o_keepalive_item); 1206 osd->o_incarnation = 1; 1207 mutex_init(&osd->lock); 1208 } 1209 1210 static void osd_cleanup(struct ceph_osd *osd) 1211 { 1212 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1213 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1214 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1215 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings)); 1216 WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id)); 1217 WARN_ON(!list_empty(&osd->o_osd_lru)); 1218 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1219 1220 if (osd->o_auth.authorizer) { 1221 WARN_ON(osd_homeless(osd)); 1222 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1223 } 1224 } 1225 1226 /* 1227 * Track open sessions with osds. 1228 */ 1229 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1230 { 1231 struct ceph_osd *osd; 1232 1233 WARN_ON(onum == CEPH_HOMELESS_OSD); 1234 1235 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1236 osd_init(osd); 1237 osd->o_osdc = osdc; 1238 osd->o_osd = onum; 1239 1240 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1241 1242 return osd; 1243 } 1244 1245 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1246 { 1247 if (refcount_inc_not_zero(&osd->o_ref)) { 1248 dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1, 1249 refcount_read(&osd->o_ref)); 1250 return osd; 1251 } else { 1252 dout("get_osd %p FAIL\n", osd); 1253 return NULL; 1254 } 1255 } 1256 1257 static void put_osd(struct ceph_osd *osd) 1258 { 1259 dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref), 1260 refcount_read(&osd->o_ref) - 1); 1261 if (refcount_dec_and_test(&osd->o_ref)) { 1262 osd_cleanup(osd); 1263 kfree(osd); 1264 } 1265 } 1266 1267 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1268 1269 static void __move_osd_to_lru(struct ceph_osd *osd) 1270 { 1271 struct ceph_osd_client *osdc = osd->o_osdc; 1272 1273 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1274 BUG_ON(!list_empty(&osd->o_osd_lru)); 1275 1276 spin_lock(&osdc->osd_lru_lock); 1277 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1278 spin_unlock(&osdc->osd_lru_lock); 1279 1280 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1281 } 1282 1283 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1284 { 1285 if (RB_EMPTY_ROOT(&osd->o_requests) && 1286 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1287 __move_osd_to_lru(osd); 1288 } 1289 1290 static void __remove_osd_from_lru(struct ceph_osd *osd) 1291 { 1292 struct ceph_osd_client *osdc = osd->o_osdc; 1293 1294 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1295 1296 spin_lock(&osdc->osd_lru_lock); 1297 if (!list_empty(&osd->o_osd_lru)) 1298 list_del_init(&osd->o_osd_lru); 1299 spin_unlock(&osdc->osd_lru_lock); 1300 } 1301 1302 /* 1303 * Close the connection and assign any leftover requests to the 1304 * homeless session. 1305 */ 1306 static void close_osd(struct ceph_osd *osd) 1307 { 1308 struct ceph_osd_client *osdc = osd->o_osdc; 1309 struct rb_node *n; 1310 1311 verify_osdc_wrlocked(osdc); 1312 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1313 1314 ceph_con_close(&osd->o_con); 1315 1316 for (n = rb_first(&osd->o_requests); n; ) { 1317 struct ceph_osd_request *req = 1318 rb_entry(n, struct ceph_osd_request, r_node); 1319 1320 n = rb_next(n); /* unlink_request() */ 1321 1322 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1323 unlink_request(osd, req); 1324 link_request(&osdc->homeless_osd, req); 1325 } 1326 for (n = rb_first(&osd->o_linger_requests); n; ) { 1327 struct ceph_osd_linger_request *lreq = 1328 rb_entry(n, struct ceph_osd_linger_request, node); 1329 1330 n = rb_next(n); /* unlink_linger() */ 1331 1332 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1333 lreq->linger_id); 1334 unlink_linger(osd, lreq); 1335 link_linger(&osdc->homeless_osd, lreq); 1336 } 1337 clear_backoffs(osd); 1338 1339 __remove_osd_from_lru(osd); 1340 erase_osd(&osdc->osds, osd); 1341 put_osd(osd); 1342 } 1343 1344 /* 1345 * reset osd connect 1346 */ 1347 static int reopen_osd(struct ceph_osd *osd) 1348 { 1349 struct ceph_entity_addr *peer_addr; 1350 1351 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1352 1353 if (RB_EMPTY_ROOT(&osd->o_requests) && 1354 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1355 close_osd(osd); 1356 return -ENODEV; 1357 } 1358 1359 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1360 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1361 !ceph_con_opened(&osd->o_con)) { 1362 struct rb_node *n; 1363 1364 dout("osd addr hasn't changed and connection never opened, " 1365 "letting msgr retry\n"); 1366 /* touch each r_stamp for handle_timeout()'s benfit */ 1367 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1368 struct ceph_osd_request *req = 1369 rb_entry(n, struct ceph_osd_request, r_node); 1370 req->r_stamp = jiffies; 1371 } 1372 1373 return -EAGAIN; 1374 } 1375 1376 ceph_con_close(&osd->o_con); 1377 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1378 osd->o_incarnation++; 1379 1380 return 0; 1381 } 1382 1383 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1384 bool wrlocked) 1385 { 1386 struct ceph_osd *osd; 1387 1388 if (wrlocked) 1389 verify_osdc_wrlocked(osdc); 1390 else 1391 verify_osdc_locked(osdc); 1392 1393 if (o != CEPH_HOMELESS_OSD) 1394 osd = lookup_osd(&osdc->osds, o); 1395 else 1396 osd = &osdc->homeless_osd; 1397 if (!osd) { 1398 if (!wrlocked) 1399 return ERR_PTR(-EAGAIN); 1400 1401 osd = create_osd(osdc, o); 1402 insert_osd(&osdc->osds, osd); 1403 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1404 &osdc->osdmap->osd_addr[osd->o_osd]); 1405 } 1406 1407 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1408 return osd; 1409 } 1410 1411 /* 1412 * Create request <-> OSD session relation. 1413 * 1414 * @req has to be assigned a tid, @osd may be homeless. 1415 */ 1416 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1417 { 1418 verify_osd_locked(osd); 1419 WARN_ON(!req->r_tid || req->r_osd); 1420 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1421 req, req->r_tid); 1422 1423 if (!osd_homeless(osd)) 1424 __remove_osd_from_lru(osd); 1425 else 1426 atomic_inc(&osd->o_osdc->num_homeless); 1427 1428 get_osd(osd); 1429 insert_request(&osd->o_requests, req); 1430 req->r_osd = osd; 1431 } 1432 1433 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1434 { 1435 verify_osd_locked(osd); 1436 WARN_ON(req->r_osd != osd); 1437 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1438 req, req->r_tid); 1439 1440 req->r_osd = NULL; 1441 erase_request(&osd->o_requests, req); 1442 put_osd(osd); 1443 1444 if (!osd_homeless(osd)) 1445 maybe_move_osd_to_lru(osd); 1446 else 1447 atomic_dec(&osd->o_osdc->num_homeless); 1448 } 1449 1450 static bool __pool_full(struct ceph_pg_pool_info *pi) 1451 { 1452 return pi->flags & CEPH_POOL_FLAG_FULL; 1453 } 1454 1455 static bool have_pool_full(struct ceph_osd_client *osdc) 1456 { 1457 struct rb_node *n; 1458 1459 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1460 struct ceph_pg_pool_info *pi = 1461 rb_entry(n, struct ceph_pg_pool_info, node); 1462 1463 if (__pool_full(pi)) 1464 return true; 1465 } 1466 1467 return false; 1468 } 1469 1470 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1471 { 1472 struct ceph_pg_pool_info *pi; 1473 1474 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1475 if (!pi) 1476 return false; 1477 1478 return __pool_full(pi); 1479 } 1480 1481 /* 1482 * Returns whether a request should be blocked from being sent 1483 * based on the current osdmap and osd_client settings. 1484 */ 1485 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1486 const struct ceph_osd_request_target *t, 1487 struct ceph_pg_pool_info *pi) 1488 { 1489 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1490 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1491 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1492 __pool_full(pi); 1493 1494 WARN_ON(pi->id != t->target_oloc.pool); 1495 return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) || 1496 ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) || 1497 (osdc->osdmap->epoch < osdc->epoch_barrier); 1498 } 1499 1500 enum calc_target_result { 1501 CALC_TARGET_NO_ACTION = 0, 1502 CALC_TARGET_NEED_RESEND, 1503 CALC_TARGET_POOL_DNE, 1504 }; 1505 1506 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1507 struct ceph_osd_request_target *t, 1508 bool any_change) 1509 { 1510 struct ceph_pg_pool_info *pi; 1511 struct ceph_pg pgid, last_pgid; 1512 struct ceph_osds up, acting; 1513 bool force_resend = false; 1514 bool unpaused = false; 1515 bool legacy_change = false; 1516 bool split = false; 1517 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1518 bool recovery_deletes = ceph_osdmap_flag(osdc, 1519 CEPH_OSDMAP_RECOVERY_DELETES); 1520 enum calc_target_result ct_res; 1521 1522 t->epoch = osdc->osdmap->epoch; 1523 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1524 if (!pi) { 1525 t->osd = CEPH_HOMELESS_OSD; 1526 ct_res = CALC_TARGET_POOL_DNE; 1527 goto out; 1528 } 1529 1530 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1531 if (t->last_force_resend < pi->last_force_request_resend) { 1532 t->last_force_resend = pi->last_force_request_resend; 1533 force_resend = true; 1534 } else if (t->last_force_resend == 0) { 1535 force_resend = true; 1536 } 1537 } 1538 1539 /* apply tiering */ 1540 ceph_oid_copy(&t->target_oid, &t->base_oid); 1541 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1542 if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1543 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) 1544 t->target_oloc.pool = pi->read_tier; 1545 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) 1546 t->target_oloc.pool = pi->write_tier; 1547 1548 pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool); 1549 if (!pi) { 1550 t->osd = CEPH_HOMELESS_OSD; 1551 ct_res = CALC_TARGET_POOL_DNE; 1552 goto out; 1553 } 1554 } 1555 1556 __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid); 1557 last_pgid.pool = pgid.pool; 1558 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1559 1560 ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting); 1561 if (any_change && 1562 ceph_is_new_interval(&t->acting, 1563 &acting, 1564 &t->up, 1565 &up, 1566 t->size, 1567 pi->size, 1568 t->min_size, 1569 pi->min_size, 1570 t->pg_num, 1571 pi->pg_num, 1572 t->sort_bitwise, 1573 sort_bitwise, 1574 t->recovery_deletes, 1575 recovery_deletes, 1576 &last_pgid)) 1577 force_resend = true; 1578 1579 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1580 t->paused = false; 1581 unpaused = true; 1582 } 1583 legacy_change = ceph_pg_compare(&t->pgid, &pgid) || 1584 ceph_osds_changed(&t->acting, &acting, any_change); 1585 if (t->pg_num) 1586 split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num); 1587 1588 if (legacy_change || force_resend || split) { 1589 t->pgid = pgid; /* struct */ 1590 ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid); 1591 ceph_osds_copy(&t->acting, &acting); 1592 ceph_osds_copy(&t->up, &up); 1593 t->size = pi->size; 1594 t->min_size = pi->min_size; 1595 t->pg_num = pi->pg_num; 1596 t->pg_num_mask = pi->pg_num_mask; 1597 t->sort_bitwise = sort_bitwise; 1598 t->recovery_deletes = recovery_deletes; 1599 1600 t->osd = acting.primary; 1601 } 1602 1603 if (unpaused || legacy_change || force_resend || split) 1604 ct_res = CALC_TARGET_NEED_RESEND; 1605 else 1606 ct_res = CALC_TARGET_NO_ACTION; 1607 1608 out: 1609 dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused, 1610 legacy_change, force_resend, split, ct_res, t->osd); 1611 return ct_res; 1612 } 1613 1614 static struct ceph_spg_mapping *alloc_spg_mapping(void) 1615 { 1616 struct ceph_spg_mapping *spg; 1617 1618 spg = kmalloc(sizeof(*spg), GFP_NOIO); 1619 if (!spg) 1620 return NULL; 1621 1622 RB_CLEAR_NODE(&spg->node); 1623 spg->backoffs = RB_ROOT; 1624 return spg; 1625 } 1626 1627 static void free_spg_mapping(struct ceph_spg_mapping *spg) 1628 { 1629 WARN_ON(!RB_EMPTY_NODE(&spg->node)); 1630 WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs)); 1631 1632 kfree(spg); 1633 } 1634 1635 /* 1636 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to 1637 * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is 1638 * defined only within a specific spgid; it does not pass anything to 1639 * children on split, or to another primary. 1640 */ 1641 DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare, 1642 RB_BYPTR, const struct ceph_spg *, node) 1643 1644 static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid) 1645 { 1646 return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits; 1647 } 1648 1649 static void hoid_get_effective_key(const struct ceph_hobject_id *hoid, 1650 void **pkey, size_t *pkey_len) 1651 { 1652 if (hoid->key_len) { 1653 *pkey = hoid->key; 1654 *pkey_len = hoid->key_len; 1655 } else { 1656 *pkey = hoid->oid; 1657 *pkey_len = hoid->oid_len; 1658 } 1659 } 1660 1661 static int compare_names(const void *name1, size_t name1_len, 1662 const void *name2, size_t name2_len) 1663 { 1664 int ret; 1665 1666 ret = memcmp(name1, name2, min(name1_len, name2_len)); 1667 if (!ret) { 1668 if (name1_len < name2_len) 1669 ret = -1; 1670 else if (name1_len > name2_len) 1671 ret = 1; 1672 } 1673 return ret; 1674 } 1675 1676 static int hoid_compare(const struct ceph_hobject_id *lhs, 1677 const struct ceph_hobject_id *rhs) 1678 { 1679 void *effective_key1, *effective_key2; 1680 size_t effective_key1_len, effective_key2_len; 1681 int ret; 1682 1683 if (lhs->is_max < rhs->is_max) 1684 return -1; 1685 if (lhs->is_max > rhs->is_max) 1686 return 1; 1687 1688 if (lhs->pool < rhs->pool) 1689 return -1; 1690 if (lhs->pool > rhs->pool) 1691 return 1; 1692 1693 if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs)) 1694 return -1; 1695 if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs)) 1696 return 1; 1697 1698 ret = compare_names(lhs->nspace, lhs->nspace_len, 1699 rhs->nspace, rhs->nspace_len); 1700 if (ret) 1701 return ret; 1702 1703 hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len); 1704 hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len); 1705 ret = compare_names(effective_key1, effective_key1_len, 1706 effective_key2, effective_key2_len); 1707 if (ret) 1708 return ret; 1709 1710 ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len); 1711 if (ret) 1712 return ret; 1713 1714 if (lhs->snapid < rhs->snapid) 1715 return -1; 1716 if (lhs->snapid > rhs->snapid) 1717 return 1; 1718 1719 return 0; 1720 } 1721 1722 /* 1723 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX 1724 * compat stuff here. 1725 * 1726 * Assumes @hoid is zero-initialized. 1727 */ 1728 static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid) 1729 { 1730 u8 struct_v; 1731 u32 struct_len; 1732 int ret; 1733 1734 ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v, 1735 &struct_len); 1736 if (ret) 1737 return ret; 1738 1739 if (struct_v < 4) { 1740 pr_err("got struct_v %d < 4 of hobject_t\n", struct_v); 1741 goto e_inval; 1742 } 1743 1744 hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len, 1745 GFP_NOIO); 1746 if (IS_ERR(hoid->key)) { 1747 ret = PTR_ERR(hoid->key); 1748 hoid->key = NULL; 1749 return ret; 1750 } 1751 1752 hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len, 1753 GFP_NOIO); 1754 if (IS_ERR(hoid->oid)) { 1755 ret = PTR_ERR(hoid->oid); 1756 hoid->oid = NULL; 1757 return ret; 1758 } 1759 1760 ceph_decode_64_safe(p, end, hoid->snapid, e_inval); 1761 ceph_decode_32_safe(p, end, hoid->hash, e_inval); 1762 ceph_decode_8_safe(p, end, hoid->is_max, e_inval); 1763 1764 hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len, 1765 GFP_NOIO); 1766 if (IS_ERR(hoid->nspace)) { 1767 ret = PTR_ERR(hoid->nspace); 1768 hoid->nspace = NULL; 1769 return ret; 1770 } 1771 1772 ceph_decode_64_safe(p, end, hoid->pool, e_inval); 1773 1774 ceph_hoid_build_hash_cache(hoid); 1775 return 0; 1776 1777 e_inval: 1778 return -EINVAL; 1779 } 1780 1781 static int hoid_encoding_size(const struct ceph_hobject_id *hoid) 1782 { 1783 return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */ 1784 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len; 1785 } 1786 1787 static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid) 1788 { 1789 ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid)); 1790 ceph_encode_string(p, end, hoid->key, hoid->key_len); 1791 ceph_encode_string(p, end, hoid->oid, hoid->oid_len); 1792 ceph_encode_64(p, hoid->snapid); 1793 ceph_encode_32(p, hoid->hash); 1794 ceph_encode_8(p, hoid->is_max); 1795 ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len); 1796 ceph_encode_64(p, hoid->pool); 1797 } 1798 1799 static void free_hoid(struct ceph_hobject_id *hoid) 1800 { 1801 if (hoid) { 1802 kfree(hoid->key); 1803 kfree(hoid->oid); 1804 kfree(hoid->nspace); 1805 kfree(hoid); 1806 } 1807 } 1808 1809 static struct ceph_osd_backoff *alloc_backoff(void) 1810 { 1811 struct ceph_osd_backoff *backoff; 1812 1813 backoff = kzalloc(sizeof(*backoff), GFP_NOIO); 1814 if (!backoff) 1815 return NULL; 1816 1817 RB_CLEAR_NODE(&backoff->spg_node); 1818 RB_CLEAR_NODE(&backoff->id_node); 1819 return backoff; 1820 } 1821 1822 static void free_backoff(struct ceph_osd_backoff *backoff) 1823 { 1824 WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node)); 1825 WARN_ON(!RB_EMPTY_NODE(&backoff->id_node)); 1826 1827 free_hoid(backoff->begin); 1828 free_hoid(backoff->end); 1829 kfree(backoff); 1830 } 1831 1832 /* 1833 * Within a specific spgid, backoffs are managed by ->begin hoid. 1834 */ 1835 DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare, 1836 RB_BYVAL, spg_node); 1837 1838 static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root, 1839 const struct ceph_hobject_id *hoid) 1840 { 1841 struct rb_node *n = root->rb_node; 1842 1843 while (n) { 1844 struct ceph_osd_backoff *cur = 1845 rb_entry(n, struct ceph_osd_backoff, spg_node); 1846 int cmp; 1847 1848 cmp = hoid_compare(hoid, cur->begin); 1849 if (cmp < 0) { 1850 n = n->rb_left; 1851 } else if (cmp > 0) { 1852 if (hoid_compare(hoid, cur->end) < 0) 1853 return cur; 1854 1855 n = n->rb_right; 1856 } else { 1857 return cur; 1858 } 1859 } 1860 1861 return NULL; 1862 } 1863 1864 /* 1865 * Each backoff has a unique id within its OSD session. 1866 */ 1867 DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node) 1868 1869 static void clear_backoffs(struct ceph_osd *osd) 1870 { 1871 while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) { 1872 struct ceph_spg_mapping *spg = 1873 rb_entry(rb_first(&osd->o_backoff_mappings), 1874 struct ceph_spg_mapping, node); 1875 1876 while (!RB_EMPTY_ROOT(&spg->backoffs)) { 1877 struct ceph_osd_backoff *backoff = 1878 rb_entry(rb_first(&spg->backoffs), 1879 struct ceph_osd_backoff, spg_node); 1880 1881 erase_backoff(&spg->backoffs, backoff); 1882 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 1883 free_backoff(backoff); 1884 } 1885 erase_spg_mapping(&osd->o_backoff_mappings, spg); 1886 free_spg_mapping(spg); 1887 } 1888 } 1889 1890 /* 1891 * Set up a temporary, non-owning view into @t. 1892 */ 1893 static void hoid_fill_from_target(struct ceph_hobject_id *hoid, 1894 const struct ceph_osd_request_target *t) 1895 { 1896 hoid->key = NULL; 1897 hoid->key_len = 0; 1898 hoid->oid = t->target_oid.name; 1899 hoid->oid_len = t->target_oid.name_len; 1900 hoid->snapid = CEPH_NOSNAP; 1901 hoid->hash = t->pgid.seed; 1902 hoid->is_max = false; 1903 if (t->target_oloc.pool_ns) { 1904 hoid->nspace = t->target_oloc.pool_ns->str; 1905 hoid->nspace_len = t->target_oloc.pool_ns->len; 1906 } else { 1907 hoid->nspace = NULL; 1908 hoid->nspace_len = 0; 1909 } 1910 hoid->pool = t->target_oloc.pool; 1911 ceph_hoid_build_hash_cache(hoid); 1912 } 1913 1914 static bool should_plug_request(struct ceph_osd_request *req) 1915 { 1916 struct ceph_osd *osd = req->r_osd; 1917 struct ceph_spg_mapping *spg; 1918 struct ceph_osd_backoff *backoff; 1919 struct ceph_hobject_id hoid; 1920 1921 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid); 1922 if (!spg) 1923 return false; 1924 1925 hoid_fill_from_target(&hoid, &req->r_t); 1926 backoff = lookup_containing_backoff(&spg->backoffs, &hoid); 1927 if (!backoff) 1928 return false; 1929 1930 dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n", 1931 __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool, 1932 backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id); 1933 return true; 1934 } 1935 1936 /* 1937 * Keep get_num_data_items() in sync with this function. 1938 */ 1939 static void setup_request_data(struct ceph_osd_request *req) 1940 { 1941 struct ceph_msg *request_msg = req->r_request; 1942 struct ceph_msg *reply_msg = req->r_reply; 1943 struct ceph_osd_req_op *op; 1944 1945 if (req->r_request->num_data_items || req->r_reply->num_data_items) 1946 return; 1947 1948 WARN_ON(request_msg->data_length || reply_msg->data_length); 1949 for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { 1950 switch (op->op) { 1951 /* request */ 1952 case CEPH_OSD_OP_WRITE: 1953 case CEPH_OSD_OP_WRITEFULL: 1954 WARN_ON(op->indata_len != op->extent.length); 1955 ceph_osdc_msg_data_add(request_msg, 1956 &op->extent.osd_data); 1957 break; 1958 case CEPH_OSD_OP_SETXATTR: 1959 case CEPH_OSD_OP_CMPXATTR: 1960 WARN_ON(op->indata_len != op->xattr.name_len + 1961 op->xattr.value_len); 1962 ceph_osdc_msg_data_add(request_msg, 1963 &op->xattr.osd_data); 1964 break; 1965 case CEPH_OSD_OP_NOTIFY_ACK: 1966 ceph_osdc_msg_data_add(request_msg, 1967 &op->notify_ack.request_data); 1968 break; 1969 case CEPH_OSD_OP_COPY_FROM2: 1970 ceph_osdc_msg_data_add(request_msg, 1971 &op->copy_from.osd_data); 1972 break; 1973 1974 /* reply */ 1975 case CEPH_OSD_OP_STAT: 1976 ceph_osdc_msg_data_add(reply_msg, 1977 &op->raw_data_in); 1978 break; 1979 case CEPH_OSD_OP_READ: 1980 ceph_osdc_msg_data_add(reply_msg, 1981 &op->extent.osd_data); 1982 break; 1983 case CEPH_OSD_OP_LIST_WATCHERS: 1984 ceph_osdc_msg_data_add(reply_msg, 1985 &op->list_watchers.response_data); 1986 break; 1987 1988 /* both */ 1989 case CEPH_OSD_OP_CALL: 1990 WARN_ON(op->indata_len != op->cls.class_len + 1991 op->cls.method_len + 1992 op->cls.indata_len); 1993 ceph_osdc_msg_data_add(request_msg, 1994 &op->cls.request_info); 1995 /* optional, can be NONE */ 1996 ceph_osdc_msg_data_add(request_msg, 1997 &op->cls.request_data); 1998 /* optional, can be NONE */ 1999 ceph_osdc_msg_data_add(reply_msg, 2000 &op->cls.response_data); 2001 break; 2002 case CEPH_OSD_OP_NOTIFY: 2003 ceph_osdc_msg_data_add(request_msg, 2004 &op->notify.request_data); 2005 ceph_osdc_msg_data_add(reply_msg, 2006 &op->notify.response_data); 2007 break; 2008 } 2009 } 2010 } 2011 2012 static void encode_pgid(void **p, const struct ceph_pg *pgid) 2013 { 2014 ceph_encode_8(p, 1); 2015 ceph_encode_64(p, pgid->pool); 2016 ceph_encode_32(p, pgid->seed); 2017 ceph_encode_32(p, -1); /* preferred */ 2018 } 2019 2020 static void encode_spgid(void **p, const struct ceph_spg *spgid) 2021 { 2022 ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1); 2023 encode_pgid(p, &spgid->pgid); 2024 ceph_encode_8(p, spgid->shard); 2025 } 2026 2027 static void encode_oloc(void **p, void *end, 2028 const struct ceph_object_locator *oloc) 2029 { 2030 ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc)); 2031 ceph_encode_64(p, oloc->pool); 2032 ceph_encode_32(p, -1); /* preferred */ 2033 ceph_encode_32(p, 0); /* key len */ 2034 if (oloc->pool_ns) 2035 ceph_encode_string(p, end, oloc->pool_ns->str, 2036 oloc->pool_ns->len); 2037 else 2038 ceph_encode_32(p, 0); 2039 } 2040 2041 static void encode_request_partial(struct ceph_osd_request *req, 2042 struct ceph_msg *msg) 2043 { 2044 void *p = msg->front.iov_base; 2045 void *const end = p + msg->front_alloc_len; 2046 u32 data_len = 0; 2047 int i; 2048 2049 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 2050 /* snapshots aren't writeable */ 2051 WARN_ON(req->r_snapid != CEPH_NOSNAP); 2052 } else { 2053 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 2054 req->r_data_offset || req->r_snapc); 2055 } 2056 2057 setup_request_data(req); 2058 2059 encode_spgid(&p, &req->r_t.spgid); /* actual spg */ 2060 ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */ 2061 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 2062 ceph_encode_32(&p, req->r_flags); 2063 2064 /* reqid */ 2065 ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid)); 2066 memset(p, 0, sizeof(struct ceph_osd_reqid)); 2067 p += sizeof(struct ceph_osd_reqid); 2068 2069 /* trace */ 2070 memset(p, 0, sizeof(struct ceph_blkin_trace_info)); 2071 p += sizeof(struct ceph_blkin_trace_info); 2072 2073 ceph_encode_32(&p, 0); /* client_inc, always 0 */ 2074 ceph_encode_timespec64(p, &req->r_mtime); 2075 p += sizeof(struct ceph_timespec); 2076 2077 encode_oloc(&p, end, &req->r_t.target_oloc); 2078 ceph_encode_string(&p, end, req->r_t.target_oid.name, 2079 req->r_t.target_oid.name_len); 2080 2081 /* ops, can imply data */ 2082 ceph_encode_16(&p, req->r_num_ops); 2083 for (i = 0; i < req->r_num_ops; i++) { 2084 data_len += osd_req_encode_op(p, &req->r_ops[i]); 2085 p += sizeof(struct ceph_osd_op); 2086 } 2087 2088 ceph_encode_64(&p, req->r_snapid); /* snapid */ 2089 if (req->r_snapc) { 2090 ceph_encode_64(&p, req->r_snapc->seq); 2091 ceph_encode_32(&p, req->r_snapc->num_snaps); 2092 for (i = 0; i < req->r_snapc->num_snaps; i++) 2093 ceph_encode_64(&p, req->r_snapc->snaps[i]); 2094 } else { 2095 ceph_encode_64(&p, 0); /* snap_seq */ 2096 ceph_encode_32(&p, 0); /* snaps len */ 2097 } 2098 2099 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 2100 BUG_ON(p > end - 8); /* space for features */ 2101 2102 msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */ 2103 /* front_len is finalized in encode_request_finish() */ 2104 msg->front.iov_len = p - msg->front.iov_base; 2105 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2106 msg->hdr.data_len = cpu_to_le32(data_len); 2107 /* 2108 * The header "data_off" is a hint to the receiver allowing it 2109 * to align received data into its buffers such that there's no 2110 * need to re-copy it before writing it to disk (direct I/O). 2111 */ 2112 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 2113 2114 dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg, 2115 req->r_t.target_oid.name, req->r_t.target_oid.name_len); 2116 } 2117 2118 static void encode_request_finish(struct ceph_msg *msg) 2119 { 2120 void *p = msg->front.iov_base; 2121 void *const partial_end = p + msg->front.iov_len; 2122 void *const end = p + msg->front_alloc_len; 2123 2124 if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) { 2125 /* luminous OSD -- encode features and be done */ 2126 p = partial_end; 2127 ceph_encode_64(&p, msg->con->peer_features); 2128 } else { 2129 struct { 2130 char spgid[CEPH_ENCODING_START_BLK_LEN + 2131 CEPH_PGID_ENCODING_LEN + 1]; 2132 __le32 hash; 2133 __le32 epoch; 2134 __le32 flags; 2135 char reqid[CEPH_ENCODING_START_BLK_LEN + 2136 sizeof(struct ceph_osd_reqid)]; 2137 char trace[sizeof(struct ceph_blkin_trace_info)]; 2138 __le32 client_inc; 2139 struct ceph_timespec mtime; 2140 } __packed head; 2141 struct ceph_pg pgid; 2142 void *oloc, *oid, *tail; 2143 int oloc_len, oid_len, tail_len; 2144 int len; 2145 2146 /* 2147 * Pre-luminous OSD -- reencode v8 into v4 using @head 2148 * as a temporary buffer. Encode the raw PG; the rest 2149 * is just a matter of moving oloc, oid and tail blobs 2150 * around. 2151 */ 2152 memcpy(&head, p, sizeof(head)); 2153 p += sizeof(head); 2154 2155 oloc = p; 2156 p += CEPH_ENCODING_START_BLK_LEN; 2157 pgid.pool = ceph_decode_64(&p); 2158 p += 4 + 4; /* preferred, key len */ 2159 len = ceph_decode_32(&p); 2160 p += len; /* nspace */ 2161 oloc_len = p - oloc; 2162 2163 oid = p; 2164 len = ceph_decode_32(&p); 2165 p += len; 2166 oid_len = p - oid; 2167 2168 tail = p; 2169 tail_len = partial_end - p; 2170 2171 p = msg->front.iov_base; 2172 ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc)); 2173 ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch)); 2174 ceph_encode_copy(&p, &head.flags, sizeof(head.flags)); 2175 ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime)); 2176 2177 /* reassert_version */ 2178 memset(p, 0, sizeof(struct ceph_eversion)); 2179 p += sizeof(struct ceph_eversion); 2180 2181 BUG_ON(p >= oloc); 2182 memmove(p, oloc, oloc_len); 2183 p += oloc_len; 2184 2185 pgid.seed = le32_to_cpu(head.hash); 2186 encode_pgid(&p, &pgid); /* raw pg */ 2187 2188 BUG_ON(p >= oid); 2189 memmove(p, oid, oid_len); 2190 p += oid_len; 2191 2192 /* tail -- ops, snapid, snapc, retry_attempt */ 2193 BUG_ON(p >= tail); 2194 memmove(p, tail, tail_len); 2195 p += tail_len; 2196 2197 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 2198 } 2199 2200 BUG_ON(p > end); 2201 msg->front.iov_len = p - msg->front.iov_base; 2202 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 2203 2204 dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg, 2205 le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len), 2206 le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len), 2207 le16_to_cpu(msg->hdr.version)); 2208 } 2209 2210 /* 2211 * @req has to be assigned a tid and registered. 2212 */ 2213 static void send_request(struct ceph_osd_request *req) 2214 { 2215 struct ceph_osd *osd = req->r_osd; 2216 2217 verify_osd_locked(osd); 2218 WARN_ON(osd->o_osd != req->r_t.osd); 2219 2220 /* backoff? */ 2221 if (should_plug_request(req)) 2222 return; 2223 2224 /* 2225 * We may have a previously queued request message hanging 2226 * around. Cancel it to avoid corrupting the msgr. 2227 */ 2228 if (req->r_sent) 2229 ceph_msg_revoke(req->r_request); 2230 2231 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 2232 if (req->r_attempts) 2233 req->r_flags |= CEPH_OSD_FLAG_RETRY; 2234 else 2235 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 2236 2237 encode_request_partial(req, req->r_request); 2238 2239 dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n", 2240 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 2241 req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed, 2242 req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags, 2243 req->r_attempts); 2244 2245 req->r_t.paused = false; 2246 req->r_stamp = jiffies; 2247 req->r_attempts++; 2248 2249 req->r_sent = osd->o_incarnation; 2250 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 2251 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 2252 } 2253 2254 static void maybe_request_map(struct ceph_osd_client *osdc) 2255 { 2256 bool continuous = false; 2257 2258 verify_osdc_locked(osdc); 2259 WARN_ON(!osdc->osdmap->epoch); 2260 2261 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2262 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 2263 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2264 dout("%s osdc %p continuous\n", __func__, osdc); 2265 continuous = true; 2266 } else { 2267 dout("%s osdc %p onetime\n", __func__, osdc); 2268 } 2269 2270 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 2271 osdc->osdmap->epoch + 1, continuous)) 2272 ceph_monc_renew_subs(&osdc->client->monc); 2273 } 2274 2275 static void complete_request(struct ceph_osd_request *req, int err); 2276 static void send_map_check(struct ceph_osd_request *req); 2277 2278 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 2279 { 2280 struct ceph_osd_client *osdc = req->r_osdc; 2281 struct ceph_osd *osd; 2282 enum calc_target_result ct_res; 2283 int err = 0; 2284 bool need_send = false; 2285 bool promoted = false; 2286 2287 WARN_ON(req->r_tid); 2288 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 2289 2290 again: 2291 ct_res = calc_target(osdc, &req->r_t, false); 2292 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 2293 goto promote; 2294 2295 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 2296 if (IS_ERR(osd)) { 2297 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 2298 goto promote; 2299 } 2300 2301 if (osdc->abort_err) { 2302 dout("req %p abort_err %d\n", req, osdc->abort_err); 2303 err = osdc->abort_err; 2304 } else if (osdc->osdmap->epoch < osdc->epoch_barrier) { 2305 dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch, 2306 osdc->epoch_barrier); 2307 req->r_t.paused = true; 2308 maybe_request_map(osdc); 2309 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2310 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 2311 dout("req %p pausewr\n", req); 2312 req->r_t.paused = true; 2313 maybe_request_map(osdc); 2314 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 2315 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2316 dout("req %p pauserd\n", req); 2317 req->r_t.paused = true; 2318 maybe_request_map(osdc); 2319 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2320 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 2321 CEPH_OSD_FLAG_FULL_FORCE)) && 2322 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2323 pool_full(osdc, req->r_t.base_oloc.pool))) { 2324 dout("req %p full/pool_full\n", req); 2325 if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) { 2326 err = -ENOSPC; 2327 } else { 2328 pr_warn_ratelimited("FULL or reached pool quota\n"); 2329 req->r_t.paused = true; 2330 maybe_request_map(osdc); 2331 } 2332 } else if (!osd_homeless(osd)) { 2333 need_send = true; 2334 } else { 2335 maybe_request_map(osdc); 2336 } 2337 2338 mutex_lock(&osd->lock); 2339 /* 2340 * Assign the tid atomically with send_request() to protect 2341 * multiple writes to the same object from racing with each 2342 * other, resulting in out of order ops on the OSDs. 2343 */ 2344 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2345 link_request(osd, req); 2346 if (need_send) 2347 send_request(req); 2348 else if (err) 2349 complete_request(req, err); 2350 mutex_unlock(&osd->lock); 2351 2352 if (!err && ct_res == CALC_TARGET_POOL_DNE) 2353 send_map_check(req); 2354 2355 if (promoted) 2356 downgrade_write(&osdc->lock); 2357 return; 2358 2359 promote: 2360 up_read(&osdc->lock); 2361 down_write(&osdc->lock); 2362 wrlocked = true; 2363 promoted = true; 2364 goto again; 2365 } 2366 2367 static void account_request(struct ceph_osd_request *req) 2368 { 2369 WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK)); 2370 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE))); 2371 2372 req->r_flags |= CEPH_OSD_FLAG_ONDISK; 2373 atomic_inc(&req->r_osdc->num_requests); 2374 2375 req->r_start_stamp = jiffies; 2376 } 2377 2378 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 2379 { 2380 ceph_osdc_get_request(req); 2381 account_request(req); 2382 __submit_request(req, wrlocked); 2383 } 2384 2385 static void finish_request(struct ceph_osd_request *req) 2386 { 2387 struct ceph_osd_client *osdc = req->r_osdc; 2388 2389 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 2390 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2391 2392 if (req->r_osd) 2393 unlink_request(req->r_osd, req); 2394 atomic_dec(&osdc->num_requests); 2395 2396 /* 2397 * If an OSD has failed or returned and a request has been sent 2398 * twice, it's possible to get a reply and end up here while the 2399 * request message is queued for delivery. We will ignore the 2400 * reply, so not a big deal, but better to try and catch it. 2401 */ 2402 ceph_msg_revoke(req->r_request); 2403 ceph_msg_revoke_incoming(req->r_reply); 2404 } 2405 2406 static void __complete_request(struct ceph_osd_request *req) 2407 { 2408 dout("%s req %p tid %llu cb %ps result %d\n", __func__, req, 2409 req->r_tid, req->r_callback, req->r_result); 2410 2411 if (req->r_callback) 2412 req->r_callback(req); 2413 complete_all(&req->r_completion); 2414 ceph_osdc_put_request(req); 2415 } 2416 2417 static void complete_request_workfn(struct work_struct *work) 2418 { 2419 struct ceph_osd_request *req = 2420 container_of(work, struct ceph_osd_request, r_complete_work); 2421 2422 __complete_request(req); 2423 } 2424 2425 /* 2426 * This is open-coded in handle_reply(). 2427 */ 2428 static void complete_request(struct ceph_osd_request *req, int err) 2429 { 2430 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2431 2432 req->r_result = err; 2433 finish_request(req); 2434 2435 INIT_WORK(&req->r_complete_work, complete_request_workfn); 2436 queue_work(req->r_osdc->completion_wq, &req->r_complete_work); 2437 } 2438 2439 static void cancel_map_check(struct ceph_osd_request *req) 2440 { 2441 struct ceph_osd_client *osdc = req->r_osdc; 2442 struct ceph_osd_request *lookup_req; 2443 2444 verify_osdc_wrlocked(osdc); 2445 2446 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2447 if (!lookup_req) 2448 return; 2449 2450 WARN_ON(lookup_req != req); 2451 erase_request_mc(&osdc->map_checks, req); 2452 ceph_osdc_put_request(req); 2453 } 2454 2455 static void cancel_request(struct ceph_osd_request *req) 2456 { 2457 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2458 2459 cancel_map_check(req); 2460 finish_request(req); 2461 complete_all(&req->r_completion); 2462 ceph_osdc_put_request(req); 2463 } 2464 2465 static void abort_request(struct ceph_osd_request *req, int err) 2466 { 2467 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 2468 2469 cancel_map_check(req); 2470 complete_request(req, err); 2471 } 2472 2473 static int abort_fn(struct ceph_osd_request *req, void *arg) 2474 { 2475 int err = *(int *)arg; 2476 2477 abort_request(req, err); 2478 return 0; /* continue iteration */ 2479 } 2480 2481 /* 2482 * Abort all in-flight requests with @err and arrange for all future 2483 * requests to be failed immediately. 2484 */ 2485 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err) 2486 { 2487 dout("%s osdc %p err %d\n", __func__, osdc, err); 2488 down_write(&osdc->lock); 2489 for_each_request(osdc, abort_fn, &err); 2490 osdc->abort_err = err; 2491 up_write(&osdc->lock); 2492 } 2493 EXPORT_SYMBOL(ceph_osdc_abort_requests); 2494 2495 void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc) 2496 { 2497 down_write(&osdc->lock); 2498 osdc->abort_err = 0; 2499 up_write(&osdc->lock); 2500 } 2501 EXPORT_SYMBOL(ceph_osdc_clear_abort_err); 2502 2503 static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2504 { 2505 if (likely(eb > osdc->epoch_barrier)) { 2506 dout("updating epoch_barrier from %u to %u\n", 2507 osdc->epoch_barrier, eb); 2508 osdc->epoch_barrier = eb; 2509 /* Request map if we're not to the barrier yet */ 2510 if (eb > osdc->osdmap->epoch) 2511 maybe_request_map(osdc); 2512 } 2513 } 2514 2515 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) 2516 { 2517 down_read(&osdc->lock); 2518 if (unlikely(eb > osdc->epoch_barrier)) { 2519 up_read(&osdc->lock); 2520 down_write(&osdc->lock); 2521 update_epoch_barrier(osdc, eb); 2522 up_write(&osdc->lock); 2523 } else { 2524 up_read(&osdc->lock); 2525 } 2526 } 2527 EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier); 2528 2529 /* 2530 * We can end up releasing caps as a result of abort_request(). 2531 * In that case, we probably want to ensure that the cap release message 2532 * has an updated epoch barrier in it, so set the epoch barrier prior to 2533 * aborting the first request. 2534 */ 2535 static int abort_on_full_fn(struct ceph_osd_request *req, void *arg) 2536 { 2537 struct ceph_osd_client *osdc = req->r_osdc; 2538 bool *victims = arg; 2539 2540 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 2541 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 2542 pool_full(osdc, req->r_t.base_oloc.pool))) { 2543 if (!*victims) { 2544 update_epoch_barrier(osdc, osdc->osdmap->epoch); 2545 *victims = true; 2546 } 2547 abort_request(req, -ENOSPC); 2548 } 2549 2550 return 0; /* continue iteration */ 2551 } 2552 2553 /* 2554 * Drop all pending requests that are stalled waiting on a full condition to 2555 * clear, and complete them with ENOSPC as the return code. Set the 2556 * osdc->epoch_barrier to the latest map epoch that we've seen if any were 2557 * cancelled. 2558 */ 2559 static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc) 2560 { 2561 bool victims = false; 2562 2563 if (ceph_test_opt(osdc->client, ABORT_ON_FULL) && 2564 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc))) 2565 for_each_request(osdc, abort_on_full_fn, &victims); 2566 } 2567 2568 static void check_pool_dne(struct ceph_osd_request *req) 2569 { 2570 struct ceph_osd_client *osdc = req->r_osdc; 2571 struct ceph_osdmap *map = osdc->osdmap; 2572 2573 verify_osdc_wrlocked(osdc); 2574 WARN_ON(!map->epoch); 2575 2576 if (req->r_attempts) { 2577 /* 2578 * We sent a request earlier, which means that 2579 * previously the pool existed, and now it does not 2580 * (i.e., it was deleted). 2581 */ 2582 req->r_map_dne_bound = map->epoch; 2583 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 2584 req->r_tid); 2585 } else { 2586 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 2587 req, req->r_tid, req->r_map_dne_bound, map->epoch); 2588 } 2589 2590 if (req->r_map_dne_bound) { 2591 if (map->epoch >= req->r_map_dne_bound) { 2592 /* we had a new enough map */ 2593 pr_info_ratelimited("tid %llu pool does not exist\n", 2594 req->r_tid); 2595 complete_request(req, -ENOENT); 2596 } 2597 } else { 2598 send_map_check(req); 2599 } 2600 } 2601 2602 static void map_check_cb(struct ceph_mon_generic_request *greq) 2603 { 2604 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2605 struct ceph_osd_request *req; 2606 u64 tid = greq->private_data; 2607 2608 WARN_ON(greq->result || !greq->u.newest); 2609 2610 down_write(&osdc->lock); 2611 req = lookup_request_mc(&osdc->map_checks, tid); 2612 if (!req) { 2613 dout("%s tid %llu dne\n", __func__, tid); 2614 goto out_unlock; 2615 } 2616 2617 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 2618 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 2619 if (!req->r_map_dne_bound) 2620 req->r_map_dne_bound = greq->u.newest; 2621 erase_request_mc(&osdc->map_checks, req); 2622 check_pool_dne(req); 2623 2624 ceph_osdc_put_request(req); 2625 out_unlock: 2626 up_write(&osdc->lock); 2627 } 2628 2629 static void send_map_check(struct ceph_osd_request *req) 2630 { 2631 struct ceph_osd_client *osdc = req->r_osdc; 2632 struct ceph_osd_request *lookup_req; 2633 int ret; 2634 2635 verify_osdc_wrlocked(osdc); 2636 2637 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 2638 if (lookup_req) { 2639 WARN_ON(lookup_req != req); 2640 return; 2641 } 2642 2643 ceph_osdc_get_request(req); 2644 insert_request_mc(&osdc->map_checks, req); 2645 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2646 map_check_cb, req->r_tid); 2647 WARN_ON(ret); 2648 } 2649 2650 /* 2651 * lingering requests, watch/notify v2 infrastructure 2652 */ 2653 static void linger_release(struct kref *kref) 2654 { 2655 struct ceph_osd_linger_request *lreq = 2656 container_of(kref, struct ceph_osd_linger_request, kref); 2657 2658 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 2659 lreq->reg_req, lreq->ping_req); 2660 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 2661 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 2662 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 2663 WARN_ON(!list_empty(&lreq->scan_item)); 2664 WARN_ON(!list_empty(&lreq->pending_lworks)); 2665 WARN_ON(lreq->osd); 2666 2667 if (lreq->reg_req) 2668 ceph_osdc_put_request(lreq->reg_req); 2669 if (lreq->ping_req) 2670 ceph_osdc_put_request(lreq->ping_req); 2671 target_destroy(&lreq->t); 2672 kfree(lreq); 2673 } 2674 2675 static void linger_put(struct ceph_osd_linger_request *lreq) 2676 { 2677 if (lreq) 2678 kref_put(&lreq->kref, linger_release); 2679 } 2680 2681 static struct ceph_osd_linger_request * 2682 linger_get(struct ceph_osd_linger_request *lreq) 2683 { 2684 kref_get(&lreq->kref); 2685 return lreq; 2686 } 2687 2688 static struct ceph_osd_linger_request * 2689 linger_alloc(struct ceph_osd_client *osdc) 2690 { 2691 struct ceph_osd_linger_request *lreq; 2692 2693 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 2694 if (!lreq) 2695 return NULL; 2696 2697 kref_init(&lreq->kref); 2698 mutex_init(&lreq->lock); 2699 RB_CLEAR_NODE(&lreq->node); 2700 RB_CLEAR_NODE(&lreq->osdc_node); 2701 RB_CLEAR_NODE(&lreq->mc_node); 2702 INIT_LIST_HEAD(&lreq->scan_item); 2703 INIT_LIST_HEAD(&lreq->pending_lworks); 2704 init_completion(&lreq->reg_commit_wait); 2705 init_completion(&lreq->notify_finish_wait); 2706 2707 lreq->osdc = osdc; 2708 target_init(&lreq->t); 2709 2710 dout("%s lreq %p\n", __func__, lreq); 2711 return lreq; 2712 } 2713 2714 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 2715 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 2716 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 2717 2718 /* 2719 * Create linger request <-> OSD session relation. 2720 * 2721 * @lreq has to be registered, @osd may be homeless. 2722 */ 2723 static void link_linger(struct ceph_osd *osd, 2724 struct ceph_osd_linger_request *lreq) 2725 { 2726 verify_osd_locked(osd); 2727 WARN_ON(!lreq->linger_id || lreq->osd); 2728 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2729 osd->o_osd, lreq, lreq->linger_id); 2730 2731 if (!osd_homeless(osd)) 2732 __remove_osd_from_lru(osd); 2733 else 2734 atomic_inc(&osd->o_osdc->num_homeless); 2735 2736 get_osd(osd); 2737 insert_linger(&osd->o_linger_requests, lreq); 2738 lreq->osd = osd; 2739 } 2740 2741 static void unlink_linger(struct ceph_osd *osd, 2742 struct ceph_osd_linger_request *lreq) 2743 { 2744 verify_osd_locked(osd); 2745 WARN_ON(lreq->osd != osd); 2746 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 2747 osd->o_osd, lreq, lreq->linger_id); 2748 2749 lreq->osd = NULL; 2750 erase_linger(&osd->o_linger_requests, lreq); 2751 put_osd(osd); 2752 2753 if (!osd_homeless(osd)) 2754 maybe_move_osd_to_lru(osd); 2755 else 2756 atomic_dec(&osd->o_osdc->num_homeless); 2757 } 2758 2759 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 2760 { 2761 verify_osdc_locked(lreq->osdc); 2762 2763 return !RB_EMPTY_NODE(&lreq->osdc_node); 2764 } 2765 2766 static bool linger_registered(struct ceph_osd_linger_request *lreq) 2767 { 2768 struct ceph_osd_client *osdc = lreq->osdc; 2769 bool registered; 2770 2771 down_read(&osdc->lock); 2772 registered = __linger_registered(lreq); 2773 up_read(&osdc->lock); 2774 2775 return registered; 2776 } 2777 2778 static void linger_register(struct ceph_osd_linger_request *lreq) 2779 { 2780 struct ceph_osd_client *osdc = lreq->osdc; 2781 2782 verify_osdc_wrlocked(osdc); 2783 WARN_ON(lreq->linger_id); 2784 2785 linger_get(lreq); 2786 lreq->linger_id = ++osdc->last_linger_id; 2787 insert_linger_osdc(&osdc->linger_requests, lreq); 2788 } 2789 2790 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2791 { 2792 struct ceph_osd_client *osdc = lreq->osdc; 2793 2794 verify_osdc_wrlocked(osdc); 2795 2796 erase_linger_osdc(&osdc->linger_requests, lreq); 2797 linger_put(lreq); 2798 } 2799 2800 static void cancel_linger_request(struct ceph_osd_request *req) 2801 { 2802 struct ceph_osd_linger_request *lreq = req->r_priv; 2803 2804 WARN_ON(!req->r_linger); 2805 cancel_request(req); 2806 linger_put(lreq); 2807 } 2808 2809 struct linger_work { 2810 struct work_struct work; 2811 struct ceph_osd_linger_request *lreq; 2812 struct list_head pending_item; 2813 unsigned long queued_stamp; 2814 2815 union { 2816 struct { 2817 u64 notify_id; 2818 u64 notifier_id; 2819 void *payload; /* points into @msg front */ 2820 size_t payload_len; 2821 2822 struct ceph_msg *msg; /* for ceph_msg_put() */ 2823 } notify; 2824 struct { 2825 int err; 2826 } error; 2827 }; 2828 }; 2829 2830 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2831 work_func_t workfn) 2832 { 2833 struct linger_work *lwork; 2834 2835 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2836 if (!lwork) 2837 return NULL; 2838 2839 INIT_WORK(&lwork->work, workfn); 2840 INIT_LIST_HEAD(&lwork->pending_item); 2841 lwork->lreq = linger_get(lreq); 2842 2843 return lwork; 2844 } 2845 2846 static void lwork_free(struct linger_work *lwork) 2847 { 2848 struct ceph_osd_linger_request *lreq = lwork->lreq; 2849 2850 mutex_lock(&lreq->lock); 2851 list_del(&lwork->pending_item); 2852 mutex_unlock(&lreq->lock); 2853 2854 linger_put(lreq); 2855 kfree(lwork); 2856 } 2857 2858 static void lwork_queue(struct linger_work *lwork) 2859 { 2860 struct ceph_osd_linger_request *lreq = lwork->lreq; 2861 struct ceph_osd_client *osdc = lreq->osdc; 2862 2863 verify_lreq_locked(lreq); 2864 WARN_ON(!list_empty(&lwork->pending_item)); 2865 2866 lwork->queued_stamp = jiffies; 2867 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2868 queue_work(osdc->notify_wq, &lwork->work); 2869 } 2870 2871 static void do_watch_notify(struct work_struct *w) 2872 { 2873 struct linger_work *lwork = container_of(w, struct linger_work, work); 2874 struct ceph_osd_linger_request *lreq = lwork->lreq; 2875 2876 if (!linger_registered(lreq)) { 2877 dout("%s lreq %p not registered\n", __func__, lreq); 2878 goto out; 2879 } 2880 2881 WARN_ON(!lreq->is_watch); 2882 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2883 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2884 lwork->notify.payload_len); 2885 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2886 lwork->notify.notifier_id, lwork->notify.payload, 2887 lwork->notify.payload_len); 2888 2889 out: 2890 ceph_msg_put(lwork->notify.msg); 2891 lwork_free(lwork); 2892 } 2893 2894 static void do_watch_error(struct work_struct *w) 2895 { 2896 struct linger_work *lwork = container_of(w, struct linger_work, work); 2897 struct ceph_osd_linger_request *lreq = lwork->lreq; 2898 2899 if (!linger_registered(lreq)) { 2900 dout("%s lreq %p not registered\n", __func__, lreq); 2901 goto out; 2902 } 2903 2904 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2905 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2906 2907 out: 2908 lwork_free(lwork); 2909 } 2910 2911 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2912 { 2913 struct linger_work *lwork; 2914 2915 lwork = lwork_alloc(lreq, do_watch_error); 2916 if (!lwork) { 2917 pr_err("failed to allocate error-lwork\n"); 2918 return; 2919 } 2920 2921 lwork->error.err = lreq->last_error; 2922 lwork_queue(lwork); 2923 } 2924 2925 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2926 int result) 2927 { 2928 if (!completion_done(&lreq->reg_commit_wait)) { 2929 lreq->reg_commit_error = (result <= 0 ? result : 0); 2930 complete_all(&lreq->reg_commit_wait); 2931 } 2932 } 2933 2934 static void linger_commit_cb(struct ceph_osd_request *req) 2935 { 2936 struct ceph_osd_linger_request *lreq = req->r_priv; 2937 2938 mutex_lock(&lreq->lock); 2939 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2940 lreq->linger_id, req->r_result); 2941 linger_reg_commit_complete(lreq, req->r_result); 2942 lreq->committed = true; 2943 2944 if (!lreq->is_watch) { 2945 struct ceph_osd_data *osd_data = 2946 osd_req_op_data(req, 0, notify, response_data); 2947 void *p = page_address(osd_data->pages[0]); 2948 2949 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2950 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2951 2952 /* make note of the notify_id */ 2953 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2954 lreq->notify_id = ceph_decode_64(&p); 2955 dout("lreq %p notify_id %llu\n", lreq, 2956 lreq->notify_id); 2957 } else { 2958 dout("lreq %p no notify_id\n", lreq); 2959 } 2960 } 2961 2962 mutex_unlock(&lreq->lock); 2963 linger_put(lreq); 2964 } 2965 2966 static int normalize_watch_error(int err) 2967 { 2968 /* 2969 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2970 * notification and a failure to reconnect because we raced with 2971 * the delete appear the same to the user. 2972 */ 2973 if (err == -ENOENT) 2974 err = -ENOTCONN; 2975 2976 return err; 2977 } 2978 2979 static void linger_reconnect_cb(struct ceph_osd_request *req) 2980 { 2981 struct ceph_osd_linger_request *lreq = req->r_priv; 2982 2983 mutex_lock(&lreq->lock); 2984 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2985 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2986 if (req->r_result < 0) { 2987 if (!lreq->last_error) { 2988 lreq->last_error = normalize_watch_error(req->r_result); 2989 queue_watch_error(lreq); 2990 } 2991 } 2992 2993 mutex_unlock(&lreq->lock); 2994 linger_put(lreq); 2995 } 2996 2997 static void send_linger(struct ceph_osd_linger_request *lreq) 2998 { 2999 struct ceph_osd_request *req = lreq->reg_req; 3000 struct ceph_osd_req_op *op = &req->r_ops[0]; 3001 3002 verify_osdc_wrlocked(req->r_osdc); 3003 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3004 3005 if (req->r_osd) 3006 cancel_linger_request(req); 3007 3008 request_reinit(req); 3009 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3010 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3011 req->r_flags = lreq->t.flags; 3012 req->r_mtime = lreq->mtime; 3013 3014 mutex_lock(&lreq->lock); 3015 if (lreq->is_watch && lreq->committed) { 3016 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 3017 op->watch.cookie != lreq->linger_id); 3018 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 3019 op->watch.gen = ++lreq->register_gen; 3020 dout("lreq %p reconnect register_gen %u\n", lreq, 3021 op->watch.gen); 3022 req->r_callback = linger_reconnect_cb; 3023 } else { 3024 if (!lreq->is_watch) 3025 lreq->notify_id = 0; 3026 else 3027 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 3028 dout("lreq %p register\n", lreq); 3029 req->r_callback = linger_commit_cb; 3030 } 3031 mutex_unlock(&lreq->lock); 3032 3033 req->r_priv = linger_get(lreq); 3034 req->r_linger = true; 3035 3036 submit_request(req, true); 3037 } 3038 3039 static void linger_ping_cb(struct ceph_osd_request *req) 3040 { 3041 struct ceph_osd_linger_request *lreq = req->r_priv; 3042 3043 mutex_lock(&lreq->lock); 3044 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 3045 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 3046 lreq->last_error); 3047 if (lreq->register_gen == req->r_ops[0].watch.gen) { 3048 if (!req->r_result) { 3049 lreq->watch_valid_thru = lreq->ping_sent; 3050 } else if (!lreq->last_error) { 3051 lreq->last_error = normalize_watch_error(req->r_result); 3052 queue_watch_error(lreq); 3053 } 3054 } else { 3055 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 3056 lreq->register_gen, req->r_ops[0].watch.gen); 3057 } 3058 3059 mutex_unlock(&lreq->lock); 3060 linger_put(lreq); 3061 } 3062 3063 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 3064 { 3065 struct ceph_osd_client *osdc = lreq->osdc; 3066 struct ceph_osd_request *req = lreq->ping_req; 3067 struct ceph_osd_req_op *op = &req->r_ops[0]; 3068 3069 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 3070 dout("%s PAUSERD\n", __func__); 3071 return; 3072 } 3073 3074 lreq->ping_sent = jiffies; 3075 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 3076 __func__, lreq, lreq->linger_id, lreq->ping_sent, 3077 lreq->register_gen); 3078 3079 if (req->r_osd) 3080 cancel_linger_request(req); 3081 3082 request_reinit(req); 3083 target_copy(&req->r_t, &lreq->t); 3084 3085 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 3086 op->watch.cookie != lreq->linger_id || 3087 op->watch.op != CEPH_OSD_WATCH_OP_PING); 3088 op->watch.gen = lreq->register_gen; 3089 req->r_callback = linger_ping_cb; 3090 req->r_priv = linger_get(lreq); 3091 req->r_linger = true; 3092 3093 ceph_osdc_get_request(req); 3094 account_request(req); 3095 req->r_tid = atomic64_inc_return(&osdc->last_tid); 3096 link_request(lreq->osd, req); 3097 send_request(req); 3098 } 3099 3100 static void linger_submit(struct ceph_osd_linger_request *lreq) 3101 { 3102 struct ceph_osd_client *osdc = lreq->osdc; 3103 struct ceph_osd *osd; 3104 3105 down_write(&osdc->lock); 3106 linger_register(lreq); 3107 if (lreq->is_watch) { 3108 lreq->reg_req->r_ops[0].watch.cookie = lreq->linger_id; 3109 lreq->ping_req->r_ops[0].watch.cookie = lreq->linger_id; 3110 } else { 3111 lreq->reg_req->r_ops[0].notify.cookie = lreq->linger_id; 3112 } 3113 3114 calc_target(osdc, &lreq->t, false); 3115 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3116 link_linger(osd, lreq); 3117 3118 send_linger(lreq); 3119 up_write(&osdc->lock); 3120 } 3121 3122 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 3123 { 3124 struct ceph_osd_client *osdc = lreq->osdc; 3125 struct ceph_osd_linger_request *lookup_lreq; 3126 3127 verify_osdc_wrlocked(osdc); 3128 3129 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3130 lreq->linger_id); 3131 if (!lookup_lreq) 3132 return; 3133 3134 WARN_ON(lookup_lreq != lreq); 3135 erase_linger_mc(&osdc->linger_map_checks, lreq); 3136 linger_put(lreq); 3137 } 3138 3139 /* 3140 * @lreq has to be both registered and linked. 3141 */ 3142 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 3143 { 3144 if (lreq->is_watch && lreq->ping_req->r_osd) 3145 cancel_linger_request(lreq->ping_req); 3146 if (lreq->reg_req->r_osd) 3147 cancel_linger_request(lreq->reg_req); 3148 cancel_linger_map_check(lreq); 3149 unlink_linger(lreq->osd, lreq); 3150 linger_unregister(lreq); 3151 } 3152 3153 static void linger_cancel(struct ceph_osd_linger_request *lreq) 3154 { 3155 struct ceph_osd_client *osdc = lreq->osdc; 3156 3157 down_write(&osdc->lock); 3158 if (__linger_registered(lreq)) 3159 __linger_cancel(lreq); 3160 up_write(&osdc->lock); 3161 } 3162 3163 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 3164 3165 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 3166 { 3167 struct ceph_osd_client *osdc = lreq->osdc; 3168 struct ceph_osdmap *map = osdc->osdmap; 3169 3170 verify_osdc_wrlocked(osdc); 3171 WARN_ON(!map->epoch); 3172 3173 if (lreq->register_gen) { 3174 lreq->map_dne_bound = map->epoch; 3175 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 3176 lreq, lreq->linger_id); 3177 } else { 3178 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 3179 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3180 map->epoch); 3181 } 3182 3183 if (lreq->map_dne_bound) { 3184 if (map->epoch >= lreq->map_dne_bound) { 3185 /* we had a new enough map */ 3186 pr_info("linger_id %llu pool does not exist\n", 3187 lreq->linger_id); 3188 linger_reg_commit_complete(lreq, -ENOENT); 3189 __linger_cancel(lreq); 3190 } 3191 } else { 3192 send_linger_map_check(lreq); 3193 } 3194 } 3195 3196 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 3197 { 3198 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 3199 struct ceph_osd_linger_request *lreq; 3200 u64 linger_id = greq->private_data; 3201 3202 WARN_ON(greq->result || !greq->u.newest); 3203 3204 down_write(&osdc->lock); 3205 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 3206 if (!lreq) { 3207 dout("%s linger_id %llu dne\n", __func__, linger_id); 3208 goto out_unlock; 3209 } 3210 3211 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 3212 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 3213 greq->u.newest); 3214 if (!lreq->map_dne_bound) 3215 lreq->map_dne_bound = greq->u.newest; 3216 erase_linger_mc(&osdc->linger_map_checks, lreq); 3217 check_linger_pool_dne(lreq); 3218 3219 linger_put(lreq); 3220 out_unlock: 3221 up_write(&osdc->lock); 3222 } 3223 3224 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 3225 { 3226 struct ceph_osd_client *osdc = lreq->osdc; 3227 struct ceph_osd_linger_request *lookup_lreq; 3228 int ret; 3229 3230 verify_osdc_wrlocked(osdc); 3231 3232 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 3233 lreq->linger_id); 3234 if (lookup_lreq) { 3235 WARN_ON(lookup_lreq != lreq); 3236 return; 3237 } 3238 3239 linger_get(lreq); 3240 insert_linger_mc(&osdc->linger_map_checks, lreq); 3241 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 3242 linger_map_check_cb, lreq->linger_id); 3243 WARN_ON(ret); 3244 } 3245 3246 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 3247 { 3248 int ret; 3249 3250 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3251 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 3252 return ret ?: lreq->reg_commit_error; 3253 } 3254 3255 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 3256 { 3257 int ret; 3258 3259 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 3260 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 3261 return ret ?: lreq->notify_finish_error; 3262 } 3263 3264 /* 3265 * Timeout callback, called every N seconds. When 1 or more OSD 3266 * requests has been active for more than N seconds, we send a keepalive 3267 * (tag + timestamp) to its OSD to ensure any communications channel 3268 * reset is detected. 3269 */ 3270 static void handle_timeout(struct work_struct *work) 3271 { 3272 struct ceph_osd_client *osdc = 3273 container_of(work, struct ceph_osd_client, timeout_work.work); 3274 struct ceph_options *opts = osdc->client->options; 3275 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 3276 unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout; 3277 LIST_HEAD(slow_osds); 3278 struct rb_node *n, *p; 3279 3280 dout("%s osdc %p\n", __func__, osdc); 3281 down_write(&osdc->lock); 3282 3283 /* 3284 * ping osds that are a bit slow. this ensures that if there 3285 * is a break in the TCP connection we will notice, and reopen 3286 * a connection with that osd (from the fault callback). 3287 */ 3288 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3289 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3290 bool found = false; 3291 3292 for (p = rb_first(&osd->o_requests); p; ) { 3293 struct ceph_osd_request *req = 3294 rb_entry(p, struct ceph_osd_request, r_node); 3295 3296 p = rb_next(p); /* abort_request() */ 3297 3298 if (time_before(req->r_stamp, cutoff)) { 3299 dout(" req %p tid %llu on osd%d is laggy\n", 3300 req, req->r_tid, osd->o_osd); 3301 found = true; 3302 } 3303 if (opts->osd_request_timeout && 3304 time_before(req->r_start_stamp, expiry_cutoff)) { 3305 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3306 req->r_tid, osd->o_osd); 3307 abort_request(req, -ETIMEDOUT); 3308 } 3309 } 3310 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 3311 struct ceph_osd_linger_request *lreq = 3312 rb_entry(p, struct ceph_osd_linger_request, node); 3313 3314 dout(" lreq %p linger_id %llu is served by osd%d\n", 3315 lreq, lreq->linger_id, osd->o_osd); 3316 found = true; 3317 3318 mutex_lock(&lreq->lock); 3319 if (lreq->is_watch && lreq->committed && !lreq->last_error) 3320 send_linger_ping(lreq); 3321 mutex_unlock(&lreq->lock); 3322 } 3323 3324 if (found) 3325 list_move_tail(&osd->o_keepalive_item, &slow_osds); 3326 } 3327 3328 if (opts->osd_request_timeout) { 3329 for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { 3330 struct ceph_osd_request *req = 3331 rb_entry(p, struct ceph_osd_request, r_node); 3332 3333 p = rb_next(p); /* abort_request() */ 3334 3335 if (time_before(req->r_start_stamp, expiry_cutoff)) { 3336 pr_err_ratelimited("tid %llu on osd%d timeout\n", 3337 req->r_tid, osdc->homeless_osd.o_osd); 3338 abort_request(req, -ETIMEDOUT); 3339 } 3340 } 3341 } 3342 3343 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 3344 maybe_request_map(osdc); 3345 3346 while (!list_empty(&slow_osds)) { 3347 struct ceph_osd *osd = list_first_entry(&slow_osds, 3348 struct ceph_osd, 3349 o_keepalive_item); 3350 list_del_init(&osd->o_keepalive_item); 3351 ceph_con_keepalive(&osd->o_con); 3352 } 3353 3354 up_write(&osdc->lock); 3355 schedule_delayed_work(&osdc->timeout_work, 3356 osdc->client->options->osd_keepalive_timeout); 3357 } 3358 3359 static void handle_osds_timeout(struct work_struct *work) 3360 { 3361 struct ceph_osd_client *osdc = 3362 container_of(work, struct ceph_osd_client, 3363 osds_timeout_work.work); 3364 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 3365 struct ceph_osd *osd, *nosd; 3366 3367 dout("%s osdc %p\n", __func__, osdc); 3368 down_write(&osdc->lock); 3369 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 3370 if (time_before(jiffies, osd->lru_ttl)) 3371 break; 3372 3373 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 3374 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 3375 close_osd(osd); 3376 } 3377 3378 up_write(&osdc->lock); 3379 schedule_delayed_work(&osdc->osds_timeout_work, 3380 round_jiffies_relative(delay)); 3381 } 3382 3383 static int ceph_oloc_decode(void **p, void *end, 3384 struct ceph_object_locator *oloc) 3385 { 3386 u8 struct_v, struct_cv; 3387 u32 len; 3388 void *struct_end; 3389 int ret = 0; 3390 3391 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3392 struct_v = ceph_decode_8(p); 3393 struct_cv = ceph_decode_8(p); 3394 if (struct_v < 3) { 3395 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 3396 struct_v, struct_cv); 3397 goto e_inval; 3398 } 3399 if (struct_cv > 6) { 3400 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 3401 struct_v, struct_cv); 3402 goto e_inval; 3403 } 3404 len = ceph_decode_32(p); 3405 ceph_decode_need(p, end, len, e_inval); 3406 struct_end = *p + len; 3407 3408 oloc->pool = ceph_decode_64(p); 3409 *p += 4; /* skip preferred */ 3410 3411 len = ceph_decode_32(p); 3412 if (len > 0) { 3413 pr_warn("ceph_object_locator::key is set\n"); 3414 goto e_inval; 3415 } 3416 3417 if (struct_v >= 5) { 3418 bool changed = false; 3419 3420 len = ceph_decode_32(p); 3421 if (len > 0) { 3422 ceph_decode_need(p, end, len, e_inval); 3423 if (!oloc->pool_ns || 3424 ceph_compare_string(oloc->pool_ns, *p, len)) 3425 changed = true; 3426 *p += len; 3427 } else { 3428 if (oloc->pool_ns) 3429 changed = true; 3430 } 3431 if (changed) { 3432 /* redirect changes namespace */ 3433 pr_warn("ceph_object_locator::nspace is changed\n"); 3434 goto e_inval; 3435 } 3436 } 3437 3438 if (struct_v >= 6) { 3439 s64 hash = ceph_decode_64(p); 3440 if (hash != -1) { 3441 pr_warn("ceph_object_locator::hash is set\n"); 3442 goto e_inval; 3443 } 3444 } 3445 3446 /* skip the rest */ 3447 *p = struct_end; 3448 out: 3449 return ret; 3450 3451 e_inval: 3452 ret = -EINVAL; 3453 goto out; 3454 } 3455 3456 static int ceph_redirect_decode(void **p, void *end, 3457 struct ceph_request_redirect *redir) 3458 { 3459 u8 struct_v, struct_cv; 3460 u32 len; 3461 void *struct_end; 3462 int ret; 3463 3464 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 3465 struct_v = ceph_decode_8(p); 3466 struct_cv = ceph_decode_8(p); 3467 if (struct_cv > 1) { 3468 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 3469 struct_v, struct_cv); 3470 goto e_inval; 3471 } 3472 len = ceph_decode_32(p); 3473 ceph_decode_need(p, end, len, e_inval); 3474 struct_end = *p + len; 3475 3476 ret = ceph_oloc_decode(p, end, &redir->oloc); 3477 if (ret) 3478 goto out; 3479 3480 len = ceph_decode_32(p); 3481 if (len > 0) { 3482 pr_warn("ceph_request_redirect::object_name is set\n"); 3483 goto e_inval; 3484 } 3485 3486 /* skip the rest */ 3487 *p = struct_end; 3488 out: 3489 return ret; 3490 3491 e_inval: 3492 ret = -EINVAL; 3493 goto out; 3494 } 3495 3496 struct MOSDOpReply { 3497 struct ceph_pg pgid; 3498 u64 flags; 3499 int result; 3500 u32 epoch; 3501 int num_ops; 3502 u32 outdata_len[CEPH_OSD_MAX_OPS]; 3503 s32 rval[CEPH_OSD_MAX_OPS]; 3504 int retry_attempt; 3505 struct ceph_eversion replay_version; 3506 u64 user_version; 3507 struct ceph_request_redirect redirect; 3508 }; 3509 3510 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 3511 { 3512 void *p = msg->front.iov_base; 3513 void *const end = p + msg->front.iov_len; 3514 u16 version = le16_to_cpu(msg->hdr.version); 3515 struct ceph_eversion bad_replay_version; 3516 u8 decode_redir; 3517 u32 len; 3518 int ret; 3519 int i; 3520 3521 ceph_decode_32_safe(&p, end, len, e_inval); 3522 ceph_decode_need(&p, end, len, e_inval); 3523 p += len; /* skip oid */ 3524 3525 ret = ceph_decode_pgid(&p, end, &m->pgid); 3526 if (ret) 3527 return ret; 3528 3529 ceph_decode_64_safe(&p, end, m->flags, e_inval); 3530 ceph_decode_32_safe(&p, end, m->result, e_inval); 3531 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 3532 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 3533 p += sizeof(bad_replay_version); 3534 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 3535 3536 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 3537 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 3538 goto e_inval; 3539 3540 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 3541 e_inval); 3542 for (i = 0; i < m->num_ops; i++) { 3543 struct ceph_osd_op *op = p; 3544 3545 m->outdata_len[i] = le32_to_cpu(op->payload_len); 3546 p += sizeof(*op); 3547 } 3548 3549 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 3550 for (i = 0; i < m->num_ops; i++) 3551 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 3552 3553 if (version >= 5) { 3554 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 3555 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 3556 p += sizeof(m->replay_version); 3557 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 3558 } else { 3559 m->replay_version = bad_replay_version; /* struct */ 3560 m->user_version = le64_to_cpu(m->replay_version.version); 3561 } 3562 3563 if (version >= 6) { 3564 if (version >= 7) 3565 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 3566 else 3567 decode_redir = 1; 3568 } else { 3569 decode_redir = 0; 3570 } 3571 3572 if (decode_redir) { 3573 ret = ceph_redirect_decode(&p, end, &m->redirect); 3574 if (ret) 3575 return ret; 3576 } else { 3577 ceph_oloc_init(&m->redirect.oloc); 3578 } 3579 3580 return 0; 3581 3582 e_inval: 3583 return -EINVAL; 3584 } 3585 3586 /* 3587 * Handle MOSDOpReply. Set ->r_result and call the callback if it is 3588 * specified. 3589 */ 3590 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 3591 { 3592 struct ceph_osd_client *osdc = osd->o_osdc; 3593 struct ceph_osd_request *req; 3594 struct MOSDOpReply m; 3595 u64 tid = le64_to_cpu(msg->hdr.tid); 3596 u32 data_len = 0; 3597 int ret; 3598 int i; 3599 3600 dout("%s msg %p tid %llu\n", __func__, msg, tid); 3601 3602 down_read(&osdc->lock); 3603 if (!osd_registered(osd)) { 3604 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3605 goto out_unlock_osdc; 3606 } 3607 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 3608 3609 mutex_lock(&osd->lock); 3610 req = lookup_request(&osd->o_requests, tid); 3611 if (!req) { 3612 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 3613 goto out_unlock_session; 3614 } 3615 3616 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 3617 ret = decode_MOSDOpReply(msg, &m); 3618 m.redirect.oloc.pool_ns = NULL; 3619 if (ret) { 3620 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 3621 req->r_tid, ret); 3622 ceph_msg_dump(msg); 3623 goto fail_request; 3624 } 3625 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 3626 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 3627 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 3628 le64_to_cpu(m.replay_version.version), m.user_version); 3629 3630 if (m.retry_attempt >= 0) { 3631 if (m.retry_attempt != req->r_attempts - 1) { 3632 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 3633 req, req->r_tid, m.retry_attempt, 3634 req->r_attempts - 1); 3635 goto out_unlock_session; 3636 } 3637 } else { 3638 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 3639 } 3640 3641 if (!ceph_oloc_empty(&m.redirect.oloc)) { 3642 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 3643 m.redirect.oloc.pool); 3644 unlink_request(osd, req); 3645 mutex_unlock(&osd->lock); 3646 3647 /* 3648 * Not ceph_oloc_copy() - changing pool_ns is not 3649 * supported. 3650 */ 3651 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 3652 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED | 3653 CEPH_OSD_FLAG_IGNORE_OVERLAY | 3654 CEPH_OSD_FLAG_IGNORE_CACHE; 3655 req->r_tid = 0; 3656 __submit_request(req, false); 3657 goto out_unlock_osdc; 3658 } 3659 3660 if (m.num_ops != req->r_num_ops) { 3661 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 3662 req->r_num_ops, req->r_tid); 3663 goto fail_request; 3664 } 3665 for (i = 0; i < req->r_num_ops; i++) { 3666 dout(" req %p tid %llu op %d rval %d len %u\n", req, 3667 req->r_tid, i, m.rval[i], m.outdata_len[i]); 3668 req->r_ops[i].rval = m.rval[i]; 3669 req->r_ops[i].outdata_len = m.outdata_len[i]; 3670 data_len += m.outdata_len[i]; 3671 } 3672 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 3673 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 3674 le32_to_cpu(msg->hdr.data_len), req->r_tid); 3675 goto fail_request; 3676 } 3677 dout("%s req %p tid %llu result %d data_len %u\n", __func__, 3678 req, req->r_tid, m.result, data_len); 3679 3680 /* 3681 * Since we only ever request ONDISK, we should only ever get 3682 * one (type of) reply back. 3683 */ 3684 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK)); 3685 req->r_result = m.result ?: data_len; 3686 finish_request(req); 3687 mutex_unlock(&osd->lock); 3688 up_read(&osdc->lock); 3689 3690 __complete_request(req); 3691 return; 3692 3693 fail_request: 3694 complete_request(req, -EIO); 3695 out_unlock_session: 3696 mutex_unlock(&osd->lock); 3697 out_unlock_osdc: 3698 up_read(&osdc->lock); 3699 } 3700 3701 static void set_pool_was_full(struct ceph_osd_client *osdc) 3702 { 3703 struct rb_node *n; 3704 3705 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 3706 struct ceph_pg_pool_info *pi = 3707 rb_entry(n, struct ceph_pg_pool_info, node); 3708 3709 pi->was_full = __pool_full(pi); 3710 } 3711 } 3712 3713 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 3714 { 3715 struct ceph_pg_pool_info *pi; 3716 3717 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 3718 if (!pi) 3719 return false; 3720 3721 return pi->was_full && !__pool_full(pi); 3722 } 3723 3724 static enum calc_target_result 3725 recalc_linger_target(struct ceph_osd_linger_request *lreq) 3726 { 3727 struct ceph_osd_client *osdc = lreq->osdc; 3728 enum calc_target_result ct_res; 3729 3730 ct_res = calc_target(osdc, &lreq->t, true); 3731 if (ct_res == CALC_TARGET_NEED_RESEND) { 3732 struct ceph_osd *osd; 3733 3734 osd = lookup_create_osd(osdc, lreq->t.osd, true); 3735 if (osd != lreq->osd) { 3736 unlink_linger(lreq->osd, lreq); 3737 link_linger(osd, lreq); 3738 } 3739 } 3740 3741 return ct_res; 3742 } 3743 3744 /* 3745 * Requeue requests whose mapping to an OSD has changed. 3746 */ 3747 static void scan_requests(struct ceph_osd *osd, 3748 bool force_resend, 3749 bool cleared_full, 3750 bool check_pool_cleared_full, 3751 struct rb_root *need_resend, 3752 struct list_head *need_resend_linger) 3753 { 3754 struct ceph_osd_client *osdc = osd->o_osdc; 3755 struct rb_node *n; 3756 bool force_resend_writes; 3757 3758 for (n = rb_first(&osd->o_linger_requests); n; ) { 3759 struct ceph_osd_linger_request *lreq = 3760 rb_entry(n, struct ceph_osd_linger_request, node); 3761 enum calc_target_result ct_res; 3762 3763 n = rb_next(n); /* recalc_linger_target() */ 3764 3765 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 3766 lreq->linger_id); 3767 ct_res = recalc_linger_target(lreq); 3768 switch (ct_res) { 3769 case CALC_TARGET_NO_ACTION: 3770 force_resend_writes = cleared_full || 3771 (check_pool_cleared_full && 3772 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 3773 if (!force_resend && !force_resend_writes) 3774 break; 3775 3776 /* fall through */ 3777 case CALC_TARGET_NEED_RESEND: 3778 cancel_linger_map_check(lreq); 3779 /* 3780 * scan_requests() for the previous epoch(s) 3781 * may have already added it to the list, since 3782 * it's not unlinked here. 3783 */ 3784 if (list_empty(&lreq->scan_item)) 3785 list_add_tail(&lreq->scan_item, need_resend_linger); 3786 break; 3787 case CALC_TARGET_POOL_DNE: 3788 list_del_init(&lreq->scan_item); 3789 check_linger_pool_dne(lreq); 3790 break; 3791 } 3792 } 3793 3794 for (n = rb_first(&osd->o_requests); n; ) { 3795 struct ceph_osd_request *req = 3796 rb_entry(n, struct ceph_osd_request, r_node); 3797 enum calc_target_result ct_res; 3798 3799 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3800 3801 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3802 ct_res = calc_target(osdc, &req->r_t, false); 3803 switch (ct_res) { 3804 case CALC_TARGET_NO_ACTION: 3805 force_resend_writes = cleared_full || 3806 (check_pool_cleared_full && 3807 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3808 if (!force_resend && 3809 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3810 !force_resend_writes)) 3811 break; 3812 3813 /* fall through */ 3814 case CALC_TARGET_NEED_RESEND: 3815 cancel_map_check(req); 3816 unlink_request(osd, req); 3817 insert_request(need_resend, req); 3818 break; 3819 case CALC_TARGET_POOL_DNE: 3820 check_pool_dne(req); 3821 break; 3822 } 3823 } 3824 } 3825 3826 static int handle_one_map(struct ceph_osd_client *osdc, 3827 void *p, void *end, bool incremental, 3828 struct rb_root *need_resend, 3829 struct list_head *need_resend_linger) 3830 { 3831 struct ceph_osdmap *newmap; 3832 struct rb_node *n; 3833 bool skipped_map = false; 3834 bool was_full; 3835 3836 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3837 set_pool_was_full(osdc); 3838 3839 if (incremental) 3840 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3841 else 3842 newmap = ceph_osdmap_decode(&p, end); 3843 if (IS_ERR(newmap)) 3844 return PTR_ERR(newmap); 3845 3846 if (newmap != osdc->osdmap) { 3847 /* 3848 * Preserve ->was_full before destroying the old map. 3849 * For pools that weren't in the old map, ->was_full 3850 * should be false. 3851 */ 3852 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3853 struct ceph_pg_pool_info *pi = 3854 rb_entry(n, struct ceph_pg_pool_info, node); 3855 struct ceph_pg_pool_info *old_pi; 3856 3857 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3858 if (old_pi) 3859 pi->was_full = old_pi->was_full; 3860 else 3861 WARN_ON(pi->was_full); 3862 } 3863 3864 if (osdc->osdmap->epoch && 3865 osdc->osdmap->epoch + 1 < newmap->epoch) { 3866 WARN_ON(incremental); 3867 skipped_map = true; 3868 } 3869 3870 ceph_osdmap_destroy(osdc->osdmap); 3871 osdc->osdmap = newmap; 3872 } 3873 3874 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3875 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3876 need_resend, need_resend_linger); 3877 3878 for (n = rb_first(&osdc->osds); n; ) { 3879 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3880 3881 n = rb_next(n); /* close_osd() */ 3882 3883 scan_requests(osd, skipped_map, was_full, true, need_resend, 3884 need_resend_linger); 3885 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3886 memcmp(&osd->o_con.peer_addr, 3887 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3888 sizeof(struct ceph_entity_addr))) 3889 close_osd(osd); 3890 } 3891 3892 return 0; 3893 } 3894 3895 static void kick_requests(struct ceph_osd_client *osdc, 3896 struct rb_root *need_resend, 3897 struct list_head *need_resend_linger) 3898 { 3899 struct ceph_osd_linger_request *lreq, *nlreq; 3900 enum calc_target_result ct_res; 3901 struct rb_node *n; 3902 3903 /* make sure need_resend targets reflect latest map */ 3904 for (n = rb_first(need_resend); n; ) { 3905 struct ceph_osd_request *req = 3906 rb_entry(n, struct ceph_osd_request, r_node); 3907 3908 n = rb_next(n); 3909 3910 if (req->r_t.epoch < osdc->osdmap->epoch) { 3911 ct_res = calc_target(osdc, &req->r_t, false); 3912 if (ct_res == CALC_TARGET_POOL_DNE) { 3913 erase_request(need_resend, req); 3914 check_pool_dne(req); 3915 } 3916 } 3917 } 3918 3919 for (n = rb_first(need_resend); n; ) { 3920 struct ceph_osd_request *req = 3921 rb_entry(n, struct ceph_osd_request, r_node); 3922 struct ceph_osd *osd; 3923 3924 n = rb_next(n); 3925 erase_request(need_resend, req); /* before link_request() */ 3926 3927 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3928 link_request(osd, req); 3929 if (!req->r_linger) { 3930 if (!osd_homeless(osd) && !req->r_t.paused) 3931 send_request(req); 3932 } else { 3933 cancel_linger_request(req); 3934 } 3935 } 3936 3937 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3938 if (!osd_homeless(lreq->osd)) 3939 send_linger(lreq); 3940 3941 list_del_init(&lreq->scan_item); 3942 } 3943 } 3944 3945 /* 3946 * Process updated osd map. 3947 * 3948 * The message contains any number of incremental and full maps, normally 3949 * indicating some sort of topology change in the cluster. Kick requests 3950 * off to different OSDs as needed. 3951 */ 3952 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3953 { 3954 void *p = msg->front.iov_base; 3955 void *const end = p + msg->front.iov_len; 3956 u32 nr_maps, maplen; 3957 u32 epoch; 3958 struct ceph_fsid fsid; 3959 struct rb_root need_resend = RB_ROOT; 3960 LIST_HEAD(need_resend_linger); 3961 bool handled_incremental = false; 3962 bool was_pauserd, was_pausewr; 3963 bool pauserd, pausewr; 3964 int err; 3965 3966 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3967 down_write(&osdc->lock); 3968 3969 /* verify fsid */ 3970 ceph_decode_need(&p, end, sizeof(fsid), bad); 3971 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3972 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3973 goto bad; 3974 3975 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3976 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3977 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3978 have_pool_full(osdc); 3979 3980 /* incremental maps */ 3981 ceph_decode_32_safe(&p, end, nr_maps, bad); 3982 dout(" %d inc maps\n", nr_maps); 3983 while (nr_maps > 0) { 3984 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3985 epoch = ceph_decode_32(&p); 3986 maplen = ceph_decode_32(&p); 3987 ceph_decode_need(&p, end, maplen, bad); 3988 if (osdc->osdmap->epoch && 3989 osdc->osdmap->epoch + 1 == epoch) { 3990 dout("applying incremental map %u len %d\n", 3991 epoch, maplen); 3992 err = handle_one_map(osdc, p, p + maplen, true, 3993 &need_resend, &need_resend_linger); 3994 if (err) 3995 goto bad; 3996 handled_incremental = true; 3997 } else { 3998 dout("ignoring incremental map %u len %d\n", 3999 epoch, maplen); 4000 } 4001 p += maplen; 4002 nr_maps--; 4003 } 4004 if (handled_incremental) 4005 goto done; 4006 4007 /* full maps */ 4008 ceph_decode_32_safe(&p, end, nr_maps, bad); 4009 dout(" %d full maps\n", nr_maps); 4010 while (nr_maps) { 4011 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 4012 epoch = ceph_decode_32(&p); 4013 maplen = ceph_decode_32(&p); 4014 ceph_decode_need(&p, end, maplen, bad); 4015 if (nr_maps > 1) { 4016 dout("skipping non-latest full map %u len %d\n", 4017 epoch, maplen); 4018 } else if (osdc->osdmap->epoch >= epoch) { 4019 dout("skipping full map %u len %d, " 4020 "older than our %u\n", epoch, maplen, 4021 osdc->osdmap->epoch); 4022 } else { 4023 dout("taking full map %u len %d\n", epoch, maplen); 4024 err = handle_one_map(osdc, p, p + maplen, false, 4025 &need_resend, &need_resend_linger); 4026 if (err) 4027 goto bad; 4028 } 4029 p += maplen; 4030 nr_maps--; 4031 } 4032 4033 done: 4034 /* 4035 * subscribe to subsequent osdmap updates if full to ensure 4036 * we find out when we are no longer full and stop returning 4037 * ENOSPC. 4038 */ 4039 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 4040 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 4041 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 4042 have_pool_full(osdc); 4043 if (was_pauserd || was_pausewr || pauserd || pausewr || 4044 osdc->osdmap->epoch < osdc->epoch_barrier) 4045 maybe_request_map(osdc); 4046 4047 kick_requests(osdc, &need_resend, &need_resend_linger); 4048 4049 ceph_osdc_abort_on_full(osdc); 4050 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 4051 osdc->osdmap->epoch); 4052 up_write(&osdc->lock); 4053 wake_up_all(&osdc->client->auth_wq); 4054 return; 4055 4056 bad: 4057 pr_err("osdc handle_map corrupt msg\n"); 4058 ceph_msg_dump(msg); 4059 up_write(&osdc->lock); 4060 } 4061 4062 /* 4063 * Resubmit requests pending on the given osd. 4064 */ 4065 static void kick_osd_requests(struct ceph_osd *osd) 4066 { 4067 struct rb_node *n; 4068 4069 clear_backoffs(osd); 4070 4071 for (n = rb_first(&osd->o_requests); n; ) { 4072 struct ceph_osd_request *req = 4073 rb_entry(n, struct ceph_osd_request, r_node); 4074 4075 n = rb_next(n); /* cancel_linger_request() */ 4076 4077 if (!req->r_linger) { 4078 if (!req->r_t.paused) 4079 send_request(req); 4080 } else { 4081 cancel_linger_request(req); 4082 } 4083 } 4084 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 4085 struct ceph_osd_linger_request *lreq = 4086 rb_entry(n, struct ceph_osd_linger_request, node); 4087 4088 send_linger(lreq); 4089 } 4090 } 4091 4092 /* 4093 * If the osd connection drops, we need to resubmit all requests. 4094 */ 4095 static void osd_fault(struct ceph_connection *con) 4096 { 4097 struct ceph_osd *osd = con->private; 4098 struct ceph_osd_client *osdc = osd->o_osdc; 4099 4100 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 4101 4102 down_write(&osdc->lock); 4103 if (!osd_registered(osd)) { 4104 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4105 goto out_unlock; 4106 } 4107 4108 if (!reopen_osd(osd)) 4109 kick_osd_requests(osd); 4110 maybe_request_map(osdc); 4111 4112 out_unlock: 4113 up_write(&osdc->lock); 4114 } 4115 4116 struct MOSDBackoff { 4117 struct ceph_spg spgid; 4118 u32 map_epoch; 4119 u8 op; 4120 u64 id; 4121 struct ceph_hobject_id *begin; 4122 struct ceph_hobject_id *end; 4123 }; 4124 4125 static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m) 4126 { 4127 void *p = msg->front.iov_base; 4128 void *const end = p + msg->front.iov_len; 4129 u8 struct_v; 4130 u32 struct_len; 4131 int ret; 4132 4133 ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len); 4134 if (ret) 4135 return ret; 4136 4137 ret = ceph_decode_pgid(&p, end, &m->spgid.pgid); 4138 if (ret) 4139 return ret; 4140 4141 ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval); 4142 ceph_decode_32_safe(&p, end, m->map_epoch, e_inval); 4143 ceph_decode_8_safe(&p, end, m->op, e_inval); 4144 ceph_decode_64_safe(&p, end, m->id, e_inval); 4145 4146 m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO); 4147 if (!m->begin) 4148 return -ENOMEM; 4149 4150 ret = decode_hoid(&p, end, m->begin); 4151 if (ret) { 4152 free_hoid(m->begin); 4153 return ret; 4154 } 4155 4156 m->end = kzalloc(sizeof(*m->end), GFP_NOIO); 4157 if (!m->end) { 4158 free_hoid(m->begin); 4159 return -ENOMEM; 4160 } 4161 4162 ret = decode_hoid(&p, end, m->end); 4163 if (ret) { 4164 free_hoid(m->begin); 4165 free_hoid(m->end); 4166 return ret; 4167 } 4168 4169 return 0; 4170 4171 e_inval: 4172 return -EINVAL; 4173 } 4174 4175 static struct ceph_msg *create_backoff_message( 4176 const struct ceph_osd_backoff *backoff, 4177 u32 map_epoch) 4178 { 4179 struct ceph_msg *msg; 4180 void *p, *end; 4181 int msg_size; 4182 4183 msg_size = CEPH_ENCODING_START_BLK_LEN + 4184 CEPH_PGID_ENCODING_LEN + 1; /* spgid */ 4185 msg_size += 4 + 1 + 8; /* map_epoch, op, id */ 4186 msg_size += CEPH_ENCODING_START_BLK_LEN + 4187 hoid_encoding_size(backoff->begin); 4188 msg_size += CEPH_ENCODING_START_BLK_LEN + 4189 hoid_encoding_size(backoff->end); 4190 4191 msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true); 4192 if (!msg) 4193 return NULL; 4194 4195 p = msg->front.iov_base; 4196 end = p + msg->front_alloc_len; 4197 4198 encode_spgid(&p, &backoff->spgid); 4199 ceph_encode_32(&p, map_epoch); 4200 ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK); 4201 ceph_encode_64(&p, backoff->id); 4202 encode_hoid(&p, end, backoff->begin); 4203 encode_hoid(&p, end, backoff->end); 4204 BUG_ON(p != end); 4205 4206 msg->front.iov_len = p - msg->front.iov_base; 4207 msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */ 4208 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 4209 4210 return msg; 4211 } 4212 4213 static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m) 4214 { 4215 struct ceph_spg_mapping *spg; 4216 struct ceph_osd_backoff *backoff; 4217 struct ceph_msg *msg; 4218 4219 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4220 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4221 4222 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid); 4223 if (!spg) { 4224 spg = alloc_spg_mapping(); 4225 if (!spg) { 4226 pr_err("%s failed to allocate spg\n", __func__); 4227 return; 4228 } 4229 spg->spgid = m->spgid; /* struct */ 4230 insert_spg_mapping(&osd->o_backoff_mappings, spg); 4231 } 4232 4233 backoff = alloc_backoff(); 4234 if (!backoff) { 4235 pr_err("%s failed to allocate backoff\n", __func__); 4236 return; 4237 } 4238 backoff->spgid = m->spgid; /* struct */ 4239 backoff->id = m->id; 4240 backoff->begin = m->begin; 4241 m->begin = NULL; /* backoff now owns this */ 4242 backoff->end = m->end; 4243 m->end = NULL; /* ditto */ 4244 4245 insert_backoff(&spg->backoffs, backoff); 4246 insert_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4247 4248 /* 4249 * Ack with original backoff's epoch so that the OSD can 4250 * discard this if there was a PG split. 4251 */ 4252 msg = create_backoff_message(backoff, m->map_epoch); 4253 if (!msg) { 4254 pr_err("%s failed to allocate msg\n", __func__); 4255 return; 4256 } 4257 ceph_con_send(&osd->o_con, msg); 4258 } 4259 4260 static bool target_contained_by(const struct ceph_osd_request_target *t, 4261 const struct ceph_hobject_id *begin, 4262 const struct ceph_hobject_id *end) 4263 { 4264 struct ceph_hobject_id hoid; 4265 int cmp; 4266 4267 hoid_fill_from_target(&hoid, t); 4268 cmp = hoid_compare(&hoid, begin); 4269 return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0); 4270 } 4271 4272 static void handle_backoff_unblock(struct ceph_osd *osd, 4273 const struct MOSDBackoff *m) 4274 { 4275 struct ceph_spg_mapping *spg; 4276 struct ceph_osd_backoff *backoff; 4277 struct rb_node *n; 4278 4279 dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, 4280 m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); 4281 4282 backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id); 4283 if (!backoff) { 4284 pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n", 4285 __func__, osd->o_osd, m->spgid.pgid.pool, 4286 m->spgid.pgid.seed, m->spgid.shard, m->id); 4287 return; 4288 } 4289 4290 if (hoid_compare(backoff->begin, m->begin) && 4291 hoid_compare(backoff->end, m->end)) { 4292 pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n", 4293 __func__, osd->o_osd, m->spgid.pgid.pool, 4294 m->spgid.pgid.seed, m->spgid.shard, m->id); 4295 /* unblock it anyway... */ 4296 } 4297 4298 spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid); 4299 BUG_ON(!spg); 4300 4301 erase_backoff(&spg->backoffs, backoff); 4302 erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); 4303 free_backoff(backoff); 4304 4305 if (RB_EMPTY_ROOT(&spg->backoffs)) { 4306 erase_spg_mapping(&osd->o_backoff_mappings, spg); 4307 free_spg_mapping(spg); 4308 } 4309 4310 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 4311 struct ceph_osd_request *req = 4312 rb_entry(n, struct ceph_osd_request, r_node); 4313 4314 if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) { 4315 /* 4316 * Match against @m, not @backoff -- the PG may 4317 * have split on the OSD. 4318 */ 4319 if (target_contained_by(&req->r_t, m->begin, m->end)) { 4320 /* 4321 * If no other installed backoff applies, 4322 * resend. 4323 */ 4324 send_request(req); 4325 } 4326 } 4327 } 4328 } 4329 4330 static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg) 4331 { 4332 struct ceph_osd_client *osdc = osd->o_osdc; 4333 struct MOSDBackoff m; 4334 int ret; 4335 4336 down_read(&osdc->lock); 4337 if (!osd_registered(osd)) { 4338 dout("%s osd%d unknown\n", __func__, osd->o_osd); 4339 up_read(&osdc->lock); 4340 return; 4341 } 4342 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 4343 4344 mutex_lock(&osd->lock); 4345 ret = decode_MOSDBackoff(msg, &m); 4346 if (ret) { 4347 pr_err("failed to decode MOSDBackoff: %d\n", ret); 4348 ceph_msg_dump(msg); 4349 goto out_unlock; 4350 } 4351 4352 switch (m.op) { 4353 case CEPH_OSD_BACKOFF_OP_BLOCK: 4354 handle_backoff_block(osd, &m); 4355 break; 4356 case CEPH_OSD_BACKOFF_OP_UNBLOCK: 4357 handle_backoff_unblock(osd, &m); 4358 break; 4359 default: 4360 pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op); 4361 } 4362 4363 free_hoid(m.begin); 4364 free_hoid(m.end); 4365 4366 out_unlock: 4367 mutex_unlock(&osd->lock); 4368 up_read(&osdc->lock); 4369 } 4370 4371 /* 4372 * Process osd watch notifications 4373 */ 4374 static void handle_watch_notify(struct ceph_osd_client *osdc, 4375 struct ceph_msg *msg) 4376 { 4377 void *p = msg->front.iov_base; 4378 void *const end = p + msg->front.iov_len; 4379 struct ceph_osd_linger_request *lreq; 4380 struct linger_work *lwork; 4381 u8 proto_ver, opcode; 4382 u64 cookie, notify_id; 4383 u64 notifier_id = 0; 4384 s32 return_code = 0; 4385 void *payload = NULL; 4386 u32 payload_len = 0; 4387 4388 ceph_decode_8_safe(&p, end, proto_ver, bad); 4389 ceph_decode_8_safe(&p, end, opcode, bad); 4390 ceph_decode_64_safe(&p, end, cookie, bad); 4391 p += 8; /* skip ver */ 4392 ceph_decode_64_safe(&p, end, notify_id, bad); 4393 4394 if (proto_ver >= 1) { 4395 ceph_decode_32_safe(&p, end, payload_len, bad); 4396 ceph_decode_need(&p, end, payload_len, bad); 4397 payload = p; 4398 p += payload_len; 4399 } 4400 4401 if (le16_to_cpu(msg->hdr.version) >= 2) 4402 ceph_decode_32_safe(&p, end, return_code, bad); 4403 4404 if (le16_to_cpu(msg->hdr.version) >= 3) 4405 ceph_decode_64_safe(&p, end, notifier_id, bad); 4406 4407 down_read(&osdc->lock); 4408 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 4409 if (!lreq) { 4410 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 4411 cookie); 4412 goto out_unlock_osdc; 4413 } 4414 4415 mutex_lock(&lreq->lock); 4416 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 4417 opcode, cookie, lreq, lreq->is_watch); 4418 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 4419 if (!lreq->last_error) { 4420 lreq->last_error = -ENOTCONN; 4421 queue_watch_error(lreq); 4422 } 4423 } else if (!lreq->is_watch) { 4424 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 4425 if (lreq->notify_id && lreq->notify_id != notify_id) { 4426 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 4427 lreq->notify_id, notify_id); 4428 } else if (!completion_done(&lreq->notify_finish_wait)) { 4429 struct ceph_msg_data *data = 4430 msg->num_data_items ? &msg->data[0] : NULL; 4431 4432 if (data) { 4433 if (lreq->preply_pages) { 4434 WARN_ON(data->type != 4435 CEPH_MSG_DATA_PAGES); 4436 *lreq->preply_pages = data->pages; 4437 *lreq->preply_len = data->length; 4438 data->own_pages = false; 4439 } 4440 } 4441 lreq->notify_finish_error = return_code; 4442 complete_all(&lreq->notify_finish_wait); 4443 } 4444 } else { 4445 /* CEPH_WATCH_EVENT_NOTIFY */ 4446 lwork = lwork_alloc(lreq, do_watch_notify); 4447 if (!lwork) { 4448 pr_err("failed to allocate notify-lwork\n"); 4449 goto out_unlock_lreq; 4450 } 4451 4452 lwork->notify.notify_id = notify_id; 4453 lwork->notify.notifier_id = notifier_id; 4454 lwork->notify.payload = payload; 4455 lwork->notify.payload_len = payload_len; 4456 lwork->notify.msg = ceph_msg_get(msg); 4457 lwork_queue(lwork); 4458 } 4459 4460 out_unlock_lreq: 4461 mutex_unlock(&lreq->lock); 4462 out_unlock_osdc: 4463 up_read(&osdc->lock); 4464 return; 4465 4466 bad: 4467 pr_err("osdc handle_watch_notify corrupt msg\n"); 4468 } 4469 4470 /* 4471 * Register request, send initial attempt. 4472 */ 4473 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 4474 struct ceph_osd_request *req, 4475 bool nofail) 4476 { 4477 down_read(&osdc->lock); 4478 submit_request(req, false); 4479 up_read(&osdc->lock); 4480 4481 return 0; 4482 } 4483 EXPORT_SYMBOL(ceph_osdc_start_request); 4484 4485 /* 4486 * Unregister a registered request. The request is not completed: 4487 * ->r_result isn't set and __complete_request() isn't called. 4488 */ 4489 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 4490 { 4491 struct ceph_osd_client *osdc = req->r_osdc; 4492 4493 down_write(&osdc->lock); 4494 if (req->r_osd) 4495 cancel_request(req); 4496 up_write(&osdc->lock); 4497 } 4498 EXPORT_SYMBOL(ceph_osdc_cancel_request); 4499 4500 /* 4501 * @timeout: in jiffies, 0 means "wait forever" 4502 */ 4503 static int wait_request_timeout(struct ceph_osd_request *req, 4504 unsigned long timeout) 4505 { 4506 long left; 4507 4508 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 4509 left = wait_for_completion_killable_timeout(&req->r_completion, 4510 ceph_timeout_jiffies(timeout)); 4511 if (left <= 0) { 4512 left = left ?: -ETIMEDOUT; 4513 ceph_osdc_cancel_request(req); 4514 } else { 4515 left = req->r_result; /* completed */ 4516 } 4517 4518 return left; 4519 } 4520 4521 /* 4522 * wait for a request to complete 4523 */ 4524 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 4525 struct ceph_osd_request *req) 4526 { 4527 return wait_request_timeout(req, 0); 4528 } 4529 EXPORT_SYMBOL(ceph_osdc_wait_request); 4530 4531 /* 4532 * sync - wait for all in-flight requests to flush. avoid starvation. 4533 */ 4534 void ceph_osdc_sync(struct ceph_osd_client *osdc) 4535 { 4536 struct rb_node *n, *p; 4537 u64 last_tid = atomic64_read(&osdc->last_tid); 4538 4539 again: 4540 down_read(&osdc->lock); 4541 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 4542 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 4543 4544 mutex_lock(&osd->lock); 4545 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 4546 struct ceph_osd_request *req = 4547 rb_entry(p, struct ceph_osd_request, r_node); 4548 4549 if (req->r_tid > last_tid) 4550 break; 4551 4552 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 4553 continue; 4554 4555 ceph_osdc_get_request(req); 4556 mutex_unlock(&osd->lock); 4557 up_read(&osdc->lock); 4558 dout("%s waiting on req %p tid %llu last_tid %llu\n", 4559 __func__, req, req->r_tid, last_tid); 4560 wait_for_completion(&req->r_completion); 4561 ceph_osdc_put_request(req); 4562 goto again; 4563 } 4564 4565 mutex_unlock(&osd->lock); 4566 } 4567 4568 up_read(&osdc->lock); 4569 dout("%s done last_tid %llu\n", __func__, last_tid); 4570 } 4571 EXPORT_SYMBOL(ceph_osdc_sync); 4572 4573 static struct ceph_osd_request * 4574 alloc_linger_request(struct ceph_osd_linger_request *lreq) 4575 { 4576 struct ceph_osd_request *req; 4577 4578 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 4579 if (!req) 4580 return NULL; 4581 4582 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4583 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4584 return req; 4585 } 4586 4587 static struct ceph_osd_request * 4588 alloc_watch_request(struct ceph_osd_linger_request *lreq, u8 watch_opcode) 4589 { 4590 struct ceph_osd_request *req; 4591 4592 req = alloc_linger_request(lreq); 4593 if (!req) 4594 return NULL; 4595 4596 /* 4597 * Pass 0 for cookie because we don't know it yet, it will be 4598 * filled in by linger_submit(). 4599 */ 4600 osd_req_op_watch_init(req, 0, 0, watch_opcode); 4601 4602 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 4603 ceph_osdc_put_request(req); 4604 return NULL; 4605 } 4606 4607 return req; 4608 } 4609 4610 /* 4611 * Returns a handle, caller owns a ref. 4612 */ 4613 struct ceph_osd_linger_request * 4614 ceph_osdc_watch(struct ceph_osd_client *osdc, 4615 struct ceph_object_id *oid, 4616 struct ceph_object_locator *oloc, 4617 rados_watchcb2_t wcb, 4618 rados_watcherrcb_t errcb, 4619 void *data) 4620 { 4621 struct ceph_osd_linger_request *lreq; 4622 int ret; 4623 4624 lreq = linger_alloc(osdc); 4625 if (!lreq) 4626 return ERR_PTR(-ENOMEM); 4627 4628 lreq->is_watch = true; 4629 lreq->wcb = wcb; 4630 lreq->errcb = errcb; 4631 lreq->data = data; 4632 lreq->watch_valid_thru = jiffies; 4633 4634 ceph_oid_copy(&lreq->t.base_oid, oid); 4635 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4636 lreq->t.flags = CEPH_OSD_FLAG_WRITE; 4637 ktime_get_real_ts64(&lreq->mtime); 4638 4639 lreq->reg_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_WATCH); 4640 if (!lreq->reg_req) { 4641 ret = -ENOMEM; 4642 goto err_put_lreq; 4643 } 4644 4645 lreq->ping_req = alloc_watch_request(lreq, CEPH_OSD_WATCH_OP_PING); 4646 if (!lreq->ping_req) { 4647 ret = -ENOMEM; 4648 goto err_put_lreq; 4649 } 4650 4651 linger_submit(lreq); 4652 ret = linger_reg_commit_wait(lreq); 4653 if (ret) { 4654 linger_cancel(lreq); 4655 goto err_put_lreq; 4656 } 4657 4658 return lreq; 4659 4660 err_put_lreq: 4661 linger_put(lreq); 4662 return ERR_PTR(ret); 4663 } 4664 EXPORT_SYMBOL(ceph_osdc_watch); 4665 4666 /* 4667 * Releases a ref. 4668 * 4669 * Times out after mount_timeout to preserve rbd unmap behaviour 4670 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 4671 * with mount_timeout"). 4672 */ 4673 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 4674 struct ceph_osd_linger_request *lreq) 4675 { 4676 struct ceph_options *opts = osdc->client->options; 4677 struct ceph_osd_request *req; 4678 int ret; 4679 4680 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4681 if (!req) 4682 return -ENOMEM; 4683 4684 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 4685 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 4686 req->r_flags = CEPH_OSD_FLAG_WRITE; 4687 ktime_get_real_ts64(&req->r_mtime); 4688 osd_req_op_watch_init(req, 0, lreq->linger_id, 4689 CEPH_OSD_WATCH_OP_UNWATCH); 4690 4691 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4692 if (ret) 4693 goto out_put_req; 4694 4695 ceph_osdc_start_request(osdc, req, false); 4696 linger_cancel(lreq); 4697 linger_put(lreq); 4698 ret = wait_request_timeout(req, opts->mount_timeout); 4699 4700 out_put_req: 4701 ceph_osdc_put_request(req); 4702 return ret; 4703 } 4704 EXPORT_SYMBOL(ceph_osdc_unwatch); 4705 4706 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 4707 u64 notify_id, u64 cookie, void *payload, 4708 u32 payload_len) 4709 { 4710 struct ceph_osd_req_op *op; 4711 struct ceph_pagelist *pl; 4712 int ret; 4713 4714 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 4715 4716 pl = ceph_pagelist_alloc(GFP_NOIO); 4717 if (!pl) 4718 return -ENOMEM; 4719 4720 ret = ceph_pagelist_encode_64(pl, notify_id); 4721 ret |= ceph_pagelist_encode_64(pl, cookie); 4722 if (payload) { 4723 ret |= ceph_pagelist_encode_32(pl, payload_len); 4724 ret |= ceph_pagelist_append(pl, payload, payload_len); 4725 } else { 4726 ret |= ceph_pagelist_encode_32(pl, 0); 4727 } 4728 if (ret) { 4729 ceph_pagelist_release(pl); 4730 return -ENOMEM; 4731 } 4732 4733 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 4734 op->indata_len = pl->length; 4735 return 0; 4736 } 4737 4738 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 4739 struct ceph_object_id *oid, 4740 struct ceph_object_locator *oloc, 4741 u64 notify_id, 4742 u64 cookie, 4743 void *payload, 4744 u32 payload_len) 4745 { 4746 struct ceph_osd_request *req; 4747 int ret; 4748 4749 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4750 if (!req) 4751 return -ENOMEM; 4752 4753 ceph_oid_copy(&req->r_base_oid, oid); 4754 ceph_oloc_copy(&req->r_base_oloc, oloc); 4755 req->r_flags = CEPH_OSD_FLAG_READ; 4756 4757 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 4758 payload_len); 4759 if (ret) 4760 goto out_put_req; 4761 4762 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4763 if (ret) 4764 goto out_put_req; 4765 4766 ceph_osdc_start_request(osdc, req, false); 4767 ret = ceph_osdc_wait_request(osdc, req); 4768 4769 out_put_req: 4770 ceph_osdc_put_request(req); 4771 return ret; 4772 } 4773 EXPORT_SYMBOL(ceph_osdc_notify_ack); 4774 4775 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 4776 u64 cookie, u32 prot_ver, u32 timeout, 4777 void *payload, u32 payload_len) 4778 { 4779 struct ceph_osd_req_op *op; 4780 struct ceph_pagelist *pl; 4781 int ret; 4782 4783 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 4784 op->notify.cookie = cookie; 4785 4786 pl = ceph_pagelist_alloc(GFP_NOIO); 4787 if (!pl) 4788 return -ENOMEM; 4789 4790 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 4791 ret |= ceph_pagelist_encode_32(pl, timeout); 4792 ret |= ceph_pagelist_encode_32(pl, payload_len); 4793 ret |= ceph_pagelist_append(pl, payload, payload_len); 4794 if (ret) { 4795 ceph_pagelist_release(pl); 4796 return -ENOMEM; 4797 } 4798 4799 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 4800 op->indata_len = pl->length; 4801 return 0; 4802 } 4803 4804 /* 4805 * @timeout: in seconds 4806 * 4807 * @preply_{pages,len} are initialized both on success and error. 4808 * The caller is responsible for: 4809 * 4810 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 4811 */ 4812 int ceph_osdc_notify(struct ceph_osd_client *osdc, 4813 struct ceph_object_id *oid, 4814 struct ceph_object_locator *oloc, 4815 void *payload, 4816 u32 payload_len, 4817 u32 timeout, 4818 struct page ***preply_pages, 4819 size_t *preply_len) 4820 { 4821 struct ceph_osd_linger_request *lreq; 4822 struct page **pages; 4823 int ret; 4824 4825 WARN_ON(!timeout); 4826 if (preply_pages) { 4827 *preply_pages = NULL; 4828 *preply_len = 0; 4829 } 4830 4831 lreq = linger_alloc(osdc); 4832 if (!lreq) 4833 return -ENOMEM; 4834 4835 lreq->preply_pages = preply_pages; 4836 lreq->preply_len = preply_len; 4837 4838 ceph_oid_copy(&lreq->t.base_oid, oid); 4839 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 4840 lreq->t.flags = CEPH_OSD_FLAG_READ; 4841 4842 lreq->reg_req = alloc_linger_request(lreq); 4843 if (!lreq->reg_req) { 4844 ret = -ENOMEM; 4845 goto out_put_lreq; 4846 } 4847 4848 /* 4849 * Pass 0 for cookie because we don't know it yet, it will be 4850 * filled in by linger_submit(). 4851 */ 4852 ret = osd_req_op_notify_init(lreq->reg_req, 0, 0, 1, timeout, 4853 payload, payload_len); 4854 if (ret) 4855 goto out_put_lreq; 4856 4857 /* for notify_id */ 4858 pages = ceph_alloc_page_vector(1, GFP_NOIO); 4859 if (IS_ERR(pages)) { 4860 ret = PTR_ERR(pages); 4861 goto out_put_lreq; 4862 } 4863 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 4864 response_data), 4865 pages, PAGE_SIZE, 0, false, true); 4866 4867 ret = ceph_osdc_alloc_messages(lreq->reg_req, GFP_NOIO); 4868 if (ret) 4869 goto out_put_lreq; 4870 4871 linger_submit(lreq); 4872 ret = linger_reg_commit_wait(lreq); 4873 if (!ret) 4874 ret = linger_notify_finish_wait(lreq); 4875 else 4876 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 4877 4878 linger_cancel(lreq); 4879 out_put_lreq: 4880 linger_put(lreq); 4881 return ret; 4882 } 4883 EXPORT_SYMBOL(ceph_osdc_notify); 4884 4885 /* 4886 * Return the number of milliseconds since the watch was last 4887 * confirmed, or an error. If there is an error, the watch is no 4888 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 4889 */ 4890 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 4891 struct ceph_osd_linger_request *lreq) 4892 { 4893 unsigned long stamp, age; 4894 int ret; 4895 4896 down_read(&osdc->lock); 4897 mutex_lock(&lreq->lock); 4898 stamp = lreq->watch_valid_thru; 4899 if (!list_empty(&lreq->pending_lworks)) { 4900 struct linger_work *lwork = 4901 list_first_entry(&lreq->pending_lworks, 4902 struct linger_work, 4903 pending_item); 4904 4905 if (time_before(lwork->queued_stamp, stamp)) 4906 stamp = lwork->queued_stamp; 4907 } 4908 age = jiffies - stamp; 4909 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 4910 lreq, lreq->linger_id, age, lreq->last_error); 4911 /* we are truncating to msecs, so return a safe upper bound */ 4912 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 4913 4914 mutex_unlock(&lreq->lock); 4915 up_read(&osdc->lock); 4916 return ret; 4917 } 4918 4919 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 4920 { 4921 u8 struct_v; 4922 u32 struct_len; 4923 int ret; 4924 4925 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 4926 &struct_v, &struct_len); 4927 if (ret) 4928 goto bad; 4929 4930 ret = -EINVAL; 4931 ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad); 4932 ceph_decode_64_safe(p, end, item->cookie, bad); 4933 ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */ 4934 4935 if (struct_v >= 2) { 4936 ret = ceph_decode_entity_addr(p, end, &item->addr); 4937 if (ret) 4938 goto bad; 4939 } else { 4940 ret = 0; 4941 } 4942 4943 dout("%s %s%llu cookie %llu addr %s\n", __func__, 4944 ENTITY_NAME(item->name), item->cookie, 4945 ceph_pr_addr(&item->addr)); 4946 bad: 4947 return ret; 4948 } 4949 4950 static int decode_watchers(void **p, void *end, 4951 struct ceph_watch_item **watchers, 4952 u32 *num_watchers) 4953 { 4954 u8 struct_v; 4955 u32 struct_len; 4956 int i; 4957 int ret; 4958 4959 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 4960 &struct_v, &struct_len); 4961 if (ret) 4962 return ret; 4963 4964 *num_watchers = ceph_decode_32(p); 4965 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 4966 if (!*watchers) 4967 return -ENOMEM; 4968 4969 for (i = 0; i < *num_watchers; i++) { 4970 ret = decode_watcher(p, end, *watchers + i); 4971 if (ret) { 4972 kfree(*watchers); 4973 return ret; 4974 } 4975 } 4976 4977 return 0; 4978 } 4979 4980 /* 4981 * On success, the caller is responsible for: 4982 * 4983 * kfree(watchers); 4984 */ 4985 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 4986 struct ceph_object_id *oid, 4987 struct ceph_object_locator *oloc, 4988 struct ceph_watch_item **watchers, 4989 u32 *num_watchers) 4990 { 4991 struct ceph_osd_request *req; 4992 struct page **pages; 4993 int ret; 4994 4995 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4996 if (!req) 4997 return -ENOMEM; 4998 4999 ceph_oid_copy(&req->r_base_oid, oid); 5000 ceph_oloc_copy(&req->r_base_oloc, oloc); 5001 req->r_flags = CEPH_OSD_FLAG_READ; 5002 5003 pages = ceph_alloc_page_vector(1, GFP_NOIO); 5004 if (IS_ERR(pages)) { 5005 ret = PTR_ERR(pages); 5006 goto out_put_req; 5007 } 5008 5009 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 5010 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 5011 response_data), 5012 pages, PAGE_SIZE, 0, false, true); 5013 5014 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 5015 if (ret) 5016 goto out_put_req; 5017 5018 ceph_osdc_start_request(osdc, req, false); 5019 ret = ceph_osdc_wait_request(osdc, req); 5020 if (ret >= 0) { 5021 void *p = page_address(pages[0]); 5022 void *const end = p + req->r_ops[0].outdata_len; 5023 5024 ret = decode_watchers(&p, end, watchers, num_watchers); 5025 } 5026 5027 out_put_req: 5028 ceph_osdc_put_request(req); 5029 return ret; 5030 } 5031 EXPORT_SYMBOL(ceph_osdc_list_watchers); 5032 5033 /* 5034 * Call all pending notify callbacks - for use after a watch is 5035 * unregistered, to make sure no more callbacks for it will be invoked 5036 */ 5037 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 5038 { 5039 dout("%s osdc %p\n", __func__, osdc); 5040 flush_workqueue(osdc->notify_wq); 5041 } 5042 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 5043 5044 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 5045 { 5046 down_read(&osdc->lock); 5047 maybe_request_map(osdc); 5048 up_read(&osdc->lock); 5049 } 5050 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 5051 5052 /* 5053 * Execute an OSD class method on an object. 5054 * 5055 * @flags: CEPH_OSD_FLAG_* 5056 * @resp_len: in/out param for reply length 5057 */ 5058 int ceph_osdc_call(struct ceph_osd_client *osdc, 5059 struct ceph_object_id *oid, 5060 struct ceph_object_locator *oloc, 5061 const char *class, const char *method, 5062 unsigned int flags, 5063 struct page *req_page, size_t req_len, 5064 struct page **resp_pages, size_t *resp_len) 5065 { 5066 struct ceph_osd_request *req; 5067 int ret; 5068 5069 if (req_len > PAGE_SIZE) 5070 return -E2BIG; 5071 5072 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 5073 if (!req) 5074 return -ENOMEM; 5075 5076 ceph_oid_copy(&req->r_base_oid, oid); 5077 ceph_oloc_copy(&req->r_base_oloc, oloc); 5078 req->r_flags = flags; 5079 5080 ret = osd_req_op_cls_init(req, 0, class, method); 5081 if (ret) 5082 goto out_put_req; 5083 5084 if (req_page) 5085 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 5086 0, false, false); 5087 if (resp_pages) 5088 osd_req_op_cls_response_data_pages(req, 0, resp_pages, 5089 *resp_len, 0, false, false); 5090 5091 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 5092 if (ret) 5093 goto out_put_req; 5094 5095 ceph_osdc_start_request(osdc, req, false); 5096 ret = ceph_osdc_wait_request(osdc, req); 5097 if (ret >= 0) { 5098 ret = req->r_ops[0].rval; 5099 if (resp_pages) 5100 *resp_len = req->r_ops[0].outdata_len; 5101 } 5102 5103 out_put_req: 5104 ceph_osdc_put_request(req); 5105 return ret; 5106 } 5107 EXPORT_SYMBOL(ceph_osdc_call); 5108 5109 /* 5110 * reset all osd connections 5111 */ 5112 void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc) 5113 { 5114 struct rb_node *n; 5115 5116 down_write(&osdc->lock); 5117 for (n = rb_first(&osdc->osds); n; ) { 5118 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 5119 5120 n = rb_next(n); 5121 if (!reopen_osd(osd)) 5122 kick_osd_requests(osd); 5123 } 5124 up_write(&osdc->lock); 5125 } 5126 5127 /* 5128 * init, shutdown 5129 */ 5130 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 5131 { 5132 int err; 5133 5134 dout("init\n"); 5135 osdc->client = client; 5136 init_rwsem(&osdc->lock); 5137 osdc->osds = RB_ROOT; 5138 INIT_LIST_HEAD(&osdc->osd_lru); 5139 spin_lock_init(&osdc->osd_lru_lock); 5140 osd_init(&osdc->homeless_osd); 5141 osdc->homeless_osd.o_osdc = osdc; 5142 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 5143 osdc->last_linger_id = CEPH_LINGER_ID_START; 5144 osdc->linger_requests = RB_ROOT; 5145 osdc->map_checks = RB_ROOT; 5146 osdc->linger_map_checks = RB_ROOT; 5147 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 5148 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 5149 5150 err = -ENOMEM; 5151 osdc->osdmap = ceph_osdmap_alloc(); 5152 if (!osdc->osdmap) 5153 goto out; 5154 5155 osdc->req_mempool = mempool_create_slab_pool(10, 5156 ceph_osd_request_cache); 5157 if (!osdc->req_mempool) 5158 goto out_map; 5159 5160 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 5161 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "osd_op"); 5162 if (err < 0) 5163 goto out_mempool; 5164 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 5165 PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, 5166 "osd_op_reply"); 5167 if (err < 0) 5168 goto out_msgpool; 5169 5170 err = -ENOMEM; 5171 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 5172 if (!osdc->notify_wq) 5173 goto out_msgpool_reply; 5174 5175 osdc->completion_wq = create_singlethread_workqueue("ceph-completion"); 5176 if (!osdc->completion_wq) 5177 goto out_notify_wq; 5178 5179 schedule_delayed_work(&osdc->timeout_work, 5180 osdc->client->options->osd_keepalive_timeout); 5181 schedule_delayed_work(&osdc->osds_timeout_work, 5182 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 5183 5184 return 0; 5185 5186 out_notify_wq: 5187 destroy_workqueue(osdc->notify_wq); 5188 out_msgpool_reply: 5189 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5190 out_msgpool: 5191 ceph_msgpool_destroy(&osdc->msgpool_op); 5192 out_mempool: 5193 mempool_destroy(osdc->req_mempool); 5194 out_map: 5195 ceph_osdmap_destroy(osdc->osdmap); 5196 out: 5197 return err; 5198 } 5199 5200 void ceph_osdc_stop(struct ceph_osd_client *osdc) 5201 { 5202 destroy_workqueue(osdc->completion_wq); 5203 destroy_workqueue(osdc->notify_wq); 5204 cancel_delayed_work_sync(&osdc->timeout_work); 5205 cancel_delayed_work_sync(&osdc->osds_timeout_work); 5206 5207 down_write(&osdc->lock); 5208 while (!RB_EMPTY_ROOT(&osdc->osds)) { 5209 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 5210 struct ceph_osd, o_node); 5211 close_osd(osd); 5212 } 5213 up_write(&osdc->lock); 5214 WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1); 5215 osd_cleanup(&osdc->homeless_osd); 5216 5217 WARN_ON(!list_empty(&osdc->osd_lru)); 5218 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 5219 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 5220 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 5221 WARN_ON(atomic_read(&osdc->num_requests)); 5222 WARN_ON(atomic_read(&osdc->num_homeless)); 5223 5224 ceph_osdmap_destroy(osdc->osdmap); 5225 mempool_destroy(osdc->req_mempool); 5226 ceph_msgpool_destroy(&osdc->msgpool_op); 5227 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 5228 } 5229 5230 static int osd_req_op_copy_from_init(struct ceph_osd_request *req, 5231 u64 src_snapid, u64 src_version, 5232 struct ceph_object_id *src_oid, 5233 struct ceph_object_locator *src_oloc, 5234 u32 src_fadvise_flags, 5235 u32 dst_fadvise_flags, 5236 u32 truncate_seq, u64 truncate_size, 5237 u8 copy_from_flags) 5238 { 5239 struct ceph_osd_req_op *op; 5240 struct page **pages; 5241 void *p, *end; 5242 5243 pages = ceph_alloc_page_vector(1, GFP_KERNEL); 5244 if (IS_ERR(pages)) 5245 return PTR_ERR(pages); 5246 5247 op = _osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2, 5248 dst_fadvise_flags); 5249 op->copy_from.snapid = src_snapid; 5250 op->copy_from.src_version = src_version; 5251 op->copy_from.flags = copy_from_flags; 5252 op->copy_from.src_fadvise_flags = src_fadvise_flags; 5253 5254 p = page_address(pages[0]); 5255 end = p + PAGE_SIZE; 5256 ceph_encode_string(&p, end, src_oid->name, src_oid->name_len); 5257 encode_oloc(&p, end, src_oloc); 5258 ceph_encode_32(&p, truncate_seq); 5259 ceph_encode_64(&p, truncate_size); 5260 op->indata_len = PAGE_SIZE - (end - p); 5261 5262 ceph_osd_data_pages_init(&op->copy_from.osd_data, pages, 5263 op->indata_len, 0, false, true); 5264 return 0; 5265 } 5266 5267 int ceph_osdc_copy_from(struct ceph_osd_client *osdc, 5268 u64 src_snapid, u64 src_version, 5269 struct ceph_object_id *src_oid, 5270 struct ceph_object_locator *src_oloc, 5271 u32 src_fadvise_flags, 5272 struct ceph_object_id *dst_oid, 5273 struct ceph_object_locator *dst_oloc, 5274 u32 dst_fadvise_flags, 5275 u32 truncate_seq, u64 truncate_size, 5276 u8 copy_from_flags) 5277 { 5278 struct ceph_osd_request *req; 5279 int ret; 5280 5281 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL); 5282 if (!req) 5283 return -ENOMEM; 5284 5285 req->r_flags = CEPH_OSD_FLAG_WRITE; 5286 5287 ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc); 5288 ceph_oid_copy(&req->r_t.base_oid, dst_oid); 5289 5290 ret = osd_req_op_copy_from_init(req, src_snapid, src_version, src_oid, 5291 src_oloc, src_fadvise_flags, 5292 dst_fadvise_flags, truncate_seq, 5293 truncate_size, copy_from_flags); 5294 if (ret) 5295 goto out; 5296 5297 ret = ceph_osdc_alloc_messages(req, GFP_KERNEL); 5298 if (ret) 5299 goto out; 5300 5301 ceph_osdc_start_request(osdc, req, false); 5302 ret = ceph_osdc_wait_request(osdc, req); 5303 5304 out: 5305 ceph_osdc_put_request(req); 5306 return ret; 5307 } 5308 EXPORT_SYMBOL(ceph_osdc_copy_from); 5309 5310 int __init ceph_osdc_setup(void) 5311 { 5312 size_t size = sizeof(struct ceph_osd_request) + 5313 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 5314 5315 BUG_ON(ceph_osd_request_cache); 5316 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 5317 0, 0, NULL); 5318 5319 return ceph_osd_request_cache ? 0 : -ENOMEM; 5320 } 5321 5322 void ceph_osdc_cleanup(void) 5323 { 5324 BUG_ON(!ceph_osd_request_cache); 5325 kmem_cache_destroy(ceph_osd_request_cache); 5326 ceph_osd_request_cache = NULL; 5327 } 5328 5329 /* 5330 * handle incoming message 5331 */ 5332 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 5333 { 5334 struct ceph_osd *osd = con->private; 5335 struct ceph_osd_client *osdc = osd->o_osdc; 5336 int type = le16_to_cpu(msg->hdr.type); 5337 5338 switch (type) { 5339 case CEPH_MSG_OSD_MAP: 5340 ceph_osdc_handle_map(osdc, msg); 5341 break; 5342 case CEPH_MSG_OSD_OPREPLY: 5343 handle_reply(osd, msg); 5344 break; 5345 case CEPH_MSG_OSD_BACKOFF: 5346 handle_backoff(osd, msg); 5347 break; 5348 case CEPH_MSG_WATCH_NOTIFY: 5349 handle_watch_notify(osdc, msg); 5350 break; 5351 5352 default: 5353 pr_err("received unknown message type %d %s\n", type, 5354 ceph_msg_type_name(type)); 5355 } 5356 5357 ceph_msg_put(msg); 5358 } 5359 5360 /* 5361 * Lookup and return message for incoming reply. Don't try to do 5362 * anything about a larger than preallocated data portion of the 5363 * message at the moment - for now, just skip the message. 5364 */ 5365 static struct ceph_msg *get_reply(struct ceph_connection *con, 5366 struct ceph_msg_header *hdr, 5367 int *skip) 5368 { 5369 struct ceph_osd *osd = con->private; 5370 struct ceph_osd_client *osdc = osd->o_osdc; 5371 struct ceph_msg *m = NULL; 5372 struct ceph_osd_request *req; 5373 int front_len = le32_to_cpu(hdr->front_len); 5374 int data_len = le32_to_cpu(hdr->data_len); 5375 u64 tid = le64_to_cpu(hdr->tid); 5376 5377 down_read(&osdc->lock); 5378 if (!osd_registered(osd)) { 5379 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 5380 *skip = 1; 5381 goto out_unlock_osdc; 5382 } 5383 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 5384 5385 mutex_lock(&osd->lock); 5386 req = lookup_request(&osd->o_requests, tid); 5387 if (!req) { 5388 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 5389 osd->o_osd, tid); 5390 *skip = 1; 5391 goto out_unlock_session; 5392 } 5393 5394 ceph_msg_revoke_incoming(req->r_reply); 5395 5396 if (front_len > req->r_reply->front_alloc_len) { 5397 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 5398 __func__, osd->o_osd, req->r_tid, front_len, 5399 req->r_reply->front_alloc_len); 5400 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 5401 false); 5402 if (!m) 5403 goto out_unlock_session; 5404 ceph_msg_put(req->r_reply); 5405 req->r_reply = m; 5406 } 5407 5408 if (data_len > req->r_reply->data_length) { 5409 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 5410 __func__, osd->o_osd, req->r_tid, data_len, 5411 req->r_reply->data_length); 5412 m = NULL; 5413 *skip = 1; 5414 goto out_unlock_session; 5415 } 5416 5417 m = ceph_msg_get(req->r_reply); 5418 dout("get_reply tid %lld %p\n", tid, m); 5419 5420 out_unlock_session: 5421 mutex_unlock(&osd->lock); 5422 out_unlock_osdc: 5423 up_read(&osdc->lock); 5424 return m; 5425 } 5426 5427 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 5428 { 5429 struct ceph_msg *m; 5430 int type = le16_to_cpu(hdr->type); 5431 u32 front_len = le32_to_cpu(hdr->front_len); 5432 u32 data_len = le32_to_cpu(hdr->data_len); 5433 5434 m = ceph_msg_new2(type, front_len, 1, GFP_NOIO, false); 5435 if (!m) 5436 return NULL; 5437 5438 if (data_len) { 5439 struct page **pages; 5440 5441 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 5442 GFP_NOIO); 5443 if (IS_ERR(pages)) { 5444 ceph_msg_put(m); 5445 return NULL; 5446 } 5447 5448 ceph_msg_data_add_pages(m, pages, data_len, 0, true); 5449 } 5450 5451 return m; 5452 } 5453 5454 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 5455 struct ceph_msg_header *hdr, 5456 int *skip) 5457 { 5458 struct ceph_osd *osd = con->private; 5459 int type = le16_to_cpu(hdr->type); 5460 5461 *skip = 0; 5462 switch (type) { 5463 case CEPH_MSG_OSD_MAP: 5464 case CEPH_MSG_OSD_BACKOFF: 5465 case CEPH_MSG_WATCH_NOTIFY: 5466 return alloc_msg_with_page_vector(hdr); 5467 case CEPH_MSG_OSD_OPREPLY: 5468 return get_reply(con, hdr, skip); 5469 default: 5470 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 5471 osd->o_osd, type); 5472 *skip = 1; 5473 return NULL; 5474 } 5475 } 5476 5477 /* 5478 * Wrappers to refcount containing ceph_osd struct 5479 */ 5480 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 5481 { 5482 struct ceph_osd *osd = con->private; 5483 if (get_osd(osd)) 5484 return con; 5485 return NULL; 5486 } 5487 5488 static void put_osd_con(struct ceph_connection *con) 5489 { 5490 struct ceph_osd *osd = con->private; 5491 put_osd(osd); 5492 } 5493 5494 /* 5495 * authentication 5496 */ 5497 /* 5498 * Note: returned pointer is the address of a structure that's 5499 * managed separately. Caller must *not* attempt to free it. 5500 */ 5501 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 5502 int *proto, int force_new) 5503 { 5504 struct ceph_osd *o = con->private; 5505 struct ceph_osd_client *osdc = o->o_osdc; 5506 struct ceph_auth_client *ac = osdc->client->monc.auth; 5507 struct ceph_auth_handshake *auth = &o->o_auth; 5508 5509 if (force_new && auth->authorizer) { 5510 ceph_auth_destroy_authorizer(auth->authorizer); 5511 auth->authorizer = NULL; 5512 } 5513 if (!auth->authorizer) { 5514 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5515 auth); 5516 if (ret) 5517 return ERR_PTR(ret); 5518 } else { 5519 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 5520 auth); 5521 if (ret) 5522 return ERR_PTR(ret); 5523 } 5524 *proto = ac->protocol; 5525 5526 return auth; 5527 } 5528 5529 static int add_authorizer_challenge(struct ceph_connection *con, 5530 void *challenge_buf, int challenge_buf_len) 5531 { 5532 struct ceph_osd *o = con->private; 5533 struct ceph_osd_client *osdc = o->o_osdc; 5534 struct ceph_auth_client *ac = osdc->client->monc.auth; 5535 5536 return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer, 5537 challenge_buf, challenge_buf_len); 5538 } 5539 5540 static int verify_authorizer_reply(struct ceph_connection *con) 5541 { 5542 struct ceph_osd *o = con->private; 5543 struct ceph_osd_client *osdc = o->o_osdc; 5544 struct ceph_auth_client *ac = osdc->client->monc.auth; 5545 5546 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer); 5547 } 5548 5549 static int invalidate_authorizer(struct ceph_connection *con) 5550 { 5551 struct ceph_osd *o = con->private; 5552 struct ceph_osd_client *osdc = o->o_osdc; 5553 struct ceph_auth_client *ac = osdc->client->monc.auth; 5554 5555 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 5556 return ceph_monc_validate_auth(&osdc->client->monc); 5557 } 5558 5559 static void osd_reencode_message(struct ceph_msg *msg) 5560 { 5561 int type = le16_to_cpu(msg->hdr.type); 5562 5563 if (type == CEPH_MSG_OSD_OP) 5564 encode_request_finish(msg); 5565 } 5566 5567 static int osd_sign_message(struct ceph_msg *msg) 5568 { 5569 struct ceph_osd *o = msg->con->private; 5570 struct ceph_auth_handshake *auth = &o->o_auth; 5571 5572 return ceph_auth_sign_message(auth, msg); 5573 } 5574 5575 static int osd_check_message_signature(struct ceph_msg *msg) 5576 { 5577 struct ceph_osd *o = msg->con->private; 5578 struct ceph_auth_handshake *auth = &o->o_auth; 5579 5580 return ceph_auth_check_message_signature(auth, msg); 5581 } 5582 5583 static const struct ceph_connection_operations osd_con_ops = { 5584 .get = get_osd_con, 5585 .put = put_osd_con, 5586 .dispatch = dispatch, 5587 .get_authorizer = get_authorizer, 5588 .add_authorizer_challenge = add_authorizer_challenge, 5589 .verify_authorizer_reply = verify_authorizer_reply, 5590 .invalidate_authorizer = invalidate_authorizer, 5591 .alloc_msg = alloc_msg, 5592 .reencode_message = osd_reencode_message, 5593 .sign_message = osd_sign_message, 5594 .check_message_signature = osd_check_message_signature, 5595 .fault = osd_fault, 5596 }; 5597