1 2 #include <linux/ceph/ceph_debug.h> 3 4 #include <linux/module.h> 5 #include <linux/err.h> 6 #include <linux/highmem.h> 7 #include <linux/mm.h> 8 #include <linux/pagemap.h> 9 #include <linux/slab.h> 10 #include <linux/uaccess.h> 11 #ifdef CONFIG_BLOCK 12 #include <linux/bio.h> 13 #endif 14 15 #include <linux/ceph/libceph.h> 16 #include <linux/ceph/osd_client.h> 17 #include <linux/ceph/messenger.h> 18 #include <linux/ceph/decode.h> 19 #include <linux/ceph/auth.h> 20 #include <linux/ceph/pagelist.h> 21 22 #define OSD_OPREPLY_FRONT_LEN 512 23 24 static struct kmem_cache *ceph_osd_request_cache; 25 26 static const struct ceph_connection_operations osd_con_ops; 27 28 /* 29 * Implement client access to distributed object storage cluster. 30 * 31 * All data objects are stored within a cluster/cloud of OSDs, or 32 * "object storage devices." (Note that Ceph OSDs have _nothing_ to 33 * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply 34 * remote daemons serving up and coordinating consistent and safe 35 * access to storage. 36 * 37 * Cluster membership and the mapping of data objects onto storage devices 38 * are described by the osd map. 39 * 40 * We keep track of pending OSD requests (read, write), resubmit 41 * requests to different OSDs when the cluster topology/data layout 42 * change, or retry the affected requests when the communications 43 * channel with an OSD is reset. 44 */ 45 46 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req); 47 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req); 48 static void link_linger(struct ceph_osd *osd, 49 struct ceph_osd_linger_request *lreq); 50 static void unlink_linger(struct ceph_osd *osd, 51 struct ceph_osd_linger_request *lreq); 52 53 #if 1 54 static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem) 55 { 56 bool wrlocked = true; 57 58 if (unlikely(down_read_trylock(sem))) { 59 wrlocked = false; 60 up_read(sem); 61 } 62 63 return wrlocked; 64 } 65 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) 66 { 67 WARN_ON(!rwsem_is_locked(&osdc->lock)); 68 } 69 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) 70 { 71 WARN_ON(!rwsem_is_wrlocked(&osdc->lock)); 72 } 73 static inline void verify_osd_locked(struct ceph_osd *osd) 74 { 75 struct ceph_osd_client *osdc = osd->o_osdc; 76 77 WARN_ON(!(mutex_is_locked(&osd->lock) && 78 rwsem_is_locked(&osdc->lock)) && 79 !rwsem_is_wrlocked(&osdc->lock)); 80 } 81 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) 82 { 83 WARN_ON(!mutex_is_locked(&lreq->lock)); 84 } 85 #else 86 static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { } 87 static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { } 88 static inline void verify_osd_locked(struct ceph_osd *osd) { } 89 static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { } 90 #endif 91 92 /* 93 * calculate the mapping of a file extent onto an object, and fill out the 94 * request accordingly. shorten extent as necessary if it crosses an 95 * object boundary. 96 * 97 * fill osd op in request message. 98 */ 99 static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, 100 u64 *objnum, u64 *objoff, u64 *objlen) 101 { 102 u64 orig_len = *plen; 103 int r; 104 105 /* object extent? */ 106 r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum, 107 objoff, objlen); 108 if (r < 0) 109 return r; 110 if (*objlen < orig_len) { 111 *plen = *objlen; 112 dout(" skipping last %llu, final file extent %llu~%llu\n", 113 orig_len - *plen, off, *plen); 114 } 115 116 dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); 117 118 return 0; 119 } 120 121 static void ceph_osd_data_init(struct ceph_osd_data *osd_data) 122 { 123 memset(osd_data, 0, sizeof (*osd_data)); 124 osd_data->type = CEPH_OSD_DATA_TYPE_NONE; 125 } 126 127 static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data, 128 struct page **pages, u64 length, u32 alignment, 129 bool pages_from_pool, bool own_pages) 130 { 131 osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; 132 osd_data->pages = pages; 133 osd_data->length = length; 134 osd_data->alignment = alignment; 135 osd_data->pages_from_pool = pages_from_pool; 136 osd_data->own_pages = own_pages; 137 } 138 139 static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, 140 struct ceph_pagelist *pagelist) 141 { 142 osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST; 143 osd_data->pagelist = pagelist; 144 } 145 146 #ifdef CONFIG_BLOCK 147 static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, 148 struct bio *bio, size_t bio_length) 149 { 150 osd_data->type = CEPH_OSD_DATA_TYPE_BIO; 151 osd_data->bio = bio; 152 osd_data->bio_length = bio_length; 153 } 154 #endif /* CONFIG_BLOCK */ 155 156 #define osd_req_op_data(oreq, whch, typ, fld) \ 157 ({ \ 158 struct ceph_osd_request *__oreq = (oreq); \ 159 unsigned int __whch = (whch); \ 160 BUG_ON(__whch >= __oreq->r_num_ops); \ 161 &__oreq->r_ops[__whch].typ.fld; \ 162 }) 163 164 static struct ceph_osd_data * 165 osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) 166 { 167 BUG_ON(which >= osd_req->r_num_ops); 168 169 return &osd_req->r_ops[which].raw_data_in; 170 } 171 172 struct ceph_osd_data * 173 osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, 174 unsigned int which) 175 { 176 return osd_req_op_data(osd_req, which, extent, osd_data); 177 } 178 EXPORT_SYMBOL(osd_req_op_extent_osd_data); 179 180 void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, 181 unsigned int which, struct page **pages, 182 u64 length, u32 alignment, 183 bool pages_from_pool, bool own_pages) 184 { 185 struct ceph_osd_data *osd_data; 186 187 osd_data = osd_req_op_raw_data_in(osd_req, which); 188 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 189 pages_from_pool, own_pages); 190 } 191 EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); 192 193 void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, 194 unsigned int which, struct page **pages, 195 u64 length, u32 alignment, 196 bool pages_from_pool, bool own_pages) 197 { 198 struct ceph_osd_data *osd_data; 199 200 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 201 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 202 pages_from_pool, own_pages); 203 } 204 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); 205 206 void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, 207 unsigned int which, struct ceph_pagelist *pagelist) 208 { 209 struct ceph_osd_data *osd_data; 210 211 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 212 ceph_osd_data_pagelist_init(osd_data, pagelist); 213 } 214 EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); 215 216 #ifdef CONFIG_BLOCK 217 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 218 unsigned int which, struct bio *bio, size_t bio_length) 219 { 220 struct ceph_osd_data *osd_data; 221 222 osd_data = osd_req_op_data(osd_req, which, extent, osd_data); 223 ceph_osd_data_bio_init(osd_data, bio, bio_length); 224 } 225 EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); 226 #endif /* CONFIG_BLOCK */ 227 228 static void osd_req_op_cls_request_info_pagelist( 229 struct ceph_osd_request *osd_req, 230 unsigned int which, struct ceph_pagelist *pagelist) 231 { 232 struct ceph_osd_data *osd_data; 233 234 osd_data = osd_req_op_data(osd_req, which, cls, request_info); 235 ceph_osd_data_pagelist_init(osd_data, pagelist); 236 } 237 238 void osd_req_op_cls_request_data_pagelist( 239 struct ceph_osd_request *osd_req, 240 unsigned int which, struct ceph_pagelist *pagelist) 241 { 242 struct ceph_osd_data *osd_data; 243 244 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 245 ceph_osd_data_pagelist_init(osd_data, pagelist); 246 osd_req->r_ops[which].cls.indata_len += pagelist->length; 247 osd_req->r_ops[which].indata_len += pagelist->length; 248 } 249 EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); 250 251 void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, 252 unsigned int which, struct page **pages, u64 length, 253 u32 alignment, bool pages_from_pool, bool own_pages) 254 { 255 struct ceph_osd_data *osd_data; 256 257 osd_data = osd_req_op_data(osd_req, which, cls, request_data); 258 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 259 pages_from_pool, own_pages); 260 osd_req->r_ops[which].cls.indata_len += length; 261 osd_req->r_ops[which].indata_len += length; 262 } 263 EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); 264 265 void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, 266 unsigned int which, struct page **pages, u64 length, 267 u32 alignment, bool pages_from_pool, bool own_pages) 268 { 269 struct ceph_osd_data *osd_data; 270 271 osd_data = osd_req_op_data(osd_req, which, cls, response_data); 272 ceph_osd_data_pages_init(osd_data, pages, length, alignment, 273 pages_from_pool, own_pages); 274 } 275 EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); 276 277 static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) 278 { 279 switch (osd_data->type) { 280 case CEPH_OSD_DATA_TYPE_NONE: 281 return 0; 282 case CEPH_OSD_DATA_TYPE_PAGES: 283 return osd_data->length; 284 case CEPH_OSD_DATA_TYPE_PAGELIST: 285 return (u64)osd_data->pagelist->length; 286 #ifdef CONFIG_BLOCK 287 case CEPH_OSD_DATA_TYPE_BIO: 288 return (u64)osd_data->bio_length; 289 #endif /* CONFIG_BLOCK */ 290 default: 291 WARN(true, "unrecognized data type %d\n", (int)osd_data->type); 292 return 0; 293 } 294 } 295 296 static void ceph_osd_data_release(struct ceph_osd_data *osd_data) 297 { 298 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { 299 int num_pages; 300 301 num_pages = calc_pages_for((u64)osd_data->alignment, 302 (u64)osd_data->length); 303 ceph_release_page_vector(osd_data->pages, num_pages); 304 } 305 ceph_osd_data_init(osd_data); 306 } 307 308 static void osd_req_op_data_release(struct ceph_osd_request *osd_req, 309 unsigned int which) 310 { 311 struct ceph_osd_req_op *op; 312 313 BUG_ON(which >= osd_req->r_num_ops); 314 op = &osd_req->r_ops[which]; 315 316 switch (op->op) { 317 case CEPH_OSD_OP_READ: 318 case CEPH_OSD_OP_WRITE: 319 case CEPH_OSD_OP_WRITEFULL: 320 ceph_osd_data_release(&op->extent.osd_data); 321 break; 322 case CEPH_OSD_OP_CALL: 323 ceph_osd_data_release(&op->cls.request_info); 324 ceph_osd_data_release(&op->cls.request_data); 325 ceph_osd_data_release(&op->cls.response_data); 326 break; 327 case CEPH_OSD_OP_SETXATTR: 328 case CEPH_OSD_OP_CMPXATTR: 329 ceph_osd_data_release(&op->xattr.osd_data); 330 break; 331 case CEPH_OSD_OP_STAT: 332 ceph_osd_data_release(&op->raw_data_in); 333 break; 334 case CEPH_OSD_OP_NOTIFY_ACK: 335 ceph_osd_data_release(&op->notify_ack.request_data); 336 break; 337 case CEPH_OSD_OP_NOTIFY: 338 ceph_osd_data_release(&op->notify.request_data); 339 ceph_osd_data_release(&op->notify.response_data); 340 break; 341 case CEPH_OSD_OP_LIST_WATCHERS: 342 ceph_osd_data_release(&op->list_watchers.response_data); 343 break; 344 default: 345 break; 346 } 347 } 348 349 /* 350 * Assumes @t is zero-initialized. 351 */ 352 static void target_init(struct ceph_osd_request_target *t) 353 { 354 ceph_oid_init(&t->base_oid); 355 ceph_oloc_init(&t->base_oloc); 356 ceph_oid_init(&t->target_oid); 357 ceph_oloc_init(&t->target_oloc); 358 359 ceph_osds_init(&t->acting); 360 ceph_osds_init(&t->up); 361 t->size = -1; 362 t->min_size = -1; 363 364 t->osd = CEPH_HOMELESS_OSD; 365 } 366 367 static void target_copy(struct ceph_osd_request_target *dest, 368 const struct ceph_osd_request_target *src) 369 { 370 ceph_oid_copy(&dest->base_oid, &src->base_oid); 371 ceph_oloc_copy(&dest->base_oloc, &src->base_oloc); 372 ceph_oid_copy(&dest->target_oid, &src->target_oid); 373 ceph_oloc_copy(&dest->target_oloc, &src->target_oloc); 374 375 dest->pgid = src->pgid; /* struct */ 376 dest->pg_num = src->pg_num; 377 dest->pg_num_mask = src->pg_num_mask; 378 ceph_osds_copy(&dest->acting, &src->acting); 379 ceph_osds_copy(&dest->up, &src->up); 380 dest->size = src->size; 381 dest->min_size = src->min_size; 382 dest->sort_bitwise = src->sort_bitwise; 383 384 dest->flags = src->flags; 385 dest->paused = src->paused; 386 387 dest->osd = src->osd; 388 } 389 390 static void target_destroy(struct ceph_osd_request_target *t) 391 { 392 ceph_oid_destroy(&t->base_oid); 393 ceph_oloc_destroy(&t->base_oloc); 394 ceph_oid_destroy(&t->target_oid); 395 ceph_oloc_destroy(&t->target_oloc); 396 } 397 398 /* 399 * requests 400 */ 401 static void request_release_checks(struct ceph_osd_request *req) 402 { 403 WARN_ON(!RB_EMPTY_NODE(&req->r_node)); 404 WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node)); 405 WARN_ON(!list_empty(&req->r_unsafe_item)); 406 WARN_ON(req->r_osd); 407 } 408 409 static void ceph_osdc_release_request(struct kref *kref) 410 { 411 struct ceph_osd_request *req = container_of(kref, 412 struct ceph_osd_request, r_kref); 413 unsigned int which; 414 415 dout("%s %p (r_request %p r_reply %p)\n", __func__, req, 416 req->r_request, req->r_reply); 417 request_release_checks(req); 418 419 if (req->r_request) 420 ceph_msg_put(req->r_request); 421 if (req->r_reply) 422 ceph_msg_put(req->r_reply); 423 424 for (which = 0; which < req->r_num_ops; which++) 425 osd_req_op_data_release(req, which); 426 427 target_destroy(&req->r_t); 428 ceph_put_snap_context(req->r_snapc); 429 430 if (req->r_mempool) 431 mempool_free(req, req->r_osdc->req_mempool); 432 else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) 433 kmem_cache_free(ceph_osd_request_cache, req); 434 else 435 kfree(req); 436 } 437 438 void ceph_osdc_get_request(struct ceph_osd_request *req) 439 { 440 dout("%s %p (was %d)\n", __func__, req, 441 atomic_read(&req->r_kref.refcount)); 442 kref_get(&req->r_kref); 443 } 444 EXPORT_SYMBOL(ceph_osdc_get_request); 445 446 void ceph_osdc_put_request(struct ceph_osd_request *req) 447 { 448 if (req) { 449 dout("%s %p (was %d)\n", __func__, req, 450 atomic_read(&req->r_kref.refcount)); 451 kref_put(&req->r_kref, ceph_osdc_release_request); 452 } 453 } 454 EXPORT_SYMBOL(ceph_osdc_put_request); 455 456 static void request_init(struct ceph_osd_request *req) 457 { 458 /* req only, each op is zeroed in _osd_req_op_init() */ 459 memset(req, 0, sizeof(*req)); 460 461 kref_init(&req->r_kref); 462 init_completion(&req->r_completion); 463 RB_CLEAR_NODE(&req->r_node); 464 RB_CLEAR_NODE(&req->r_mc_node); 465 INIT_LIST_HEAD(&req->r_unsafe_item); 466 467 target_init(&req->r_t); 468 } 469 470 /* 471 * This is ugly, but it allows us to reuse linger registration and ping 472 * requests, keeping the structure of the code around send_linger{_ping}() 473 * reasonable. Setting up a min_nr=2 mempool for each linger request 474 * and dealing with copying ops (this blasts req only, watch op remains 475 * intact) isn't any better. 476 */ 477 static void request_reinit(struct ceph_osd_request *req) 478 { 479 struct ceph_osd_client *osdc = req->r_osdc; 480 bool mempool = req->r_mempool; 481 unsigned int num_ops = req->r_num_ops; 482 u64 snapid = req->r_snapid; 483 struct ceph_snap_context *snapc = req->r_snapc; 484 bool linger = req->r_linger; 485 struct ceph_msg *request_msg = req->r_request; 486 struct ceph_msg *reply_msg = req->r_reply; 487 488 dout("%s req %p\n", __func__, req); 489 WARN_ON(atomic_read(&req->r_kref.refcount) != 1); 490 request_release_checks(req); 491 492 WARN_ON(atomic_read(&request_msg->kref.refcount) != 1); 493 WARN_ON(atomic_read(&reply_msg->kref.refcount) != 1); 494 target_destroy(&req->r_t); 495 496 request_init(req); 497 req->r_osdc = osdc; 498 req->r_mempool = mempool; 499 req->r_num_ops = num_ops; 500 req->r_snapid = snapid; 501 req->r_snapc = snapc; 502 req->r_linger = linger; 503 req->r_request = request_msg; 504 req->r_reply = reply_msg; 505 } 506 507 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 508 struct ceph_snap_context *snapc, 509 unsigned int num_ops, 510 bool use_mempool, 511 gfp_t gfp_flags) 512 { 513 struct ceph_osd_request *req; 514 515 if (use_mempool) { 516 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 517 req = mempool_alloc(osdc->req_mempool, gfp_flags); 518 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 519 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 520 } else { 521 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 522 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]), 523 gfp_flags); 524 } 525 if (unlikely(!req)) 526 return NULL; 527 528 request_init(req); 529 req->r_osdc = osdc; 530 req->r_mempool = use_mempool; 531 req->r_num_ops = num_ops; 532 req->r_snapid = CEPH_NOSNAP; 533 req->r_snapc = ceph_get_snap_context(snapc); 534 535 dout("%s req %p\n", __func__, req); 536 return req; 537 } 538 EXPORT_SYMBOL(ceph_osdc_alloc_request); 539 540 static int ceph_oloc_encoding_size(struct ceph_object_locator *oloc) 541 { 542 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); 543 } 544 545 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 546 { 547 struct ceph_osd_client *osdc = req->r_osdc; 548 struct ceph_msg *msg; 549 int msg_size; 550 551 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 552 WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); 553 554 /* create request message */ 555 msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */ 556 msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */ 557 msg_size += CEPH_ENCODING_START_BLK_LEN + 558 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 559 msg_size += 1 + 8 + 4 + 4; /* pgid */ 560 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 561 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 562 msg_size += 8; /* snapid */ 563 msg_size += 8; /* snap_seq */ 564 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 565 msg_size += 4; /* retry_attempt */ 566 567 if (req->r_mempool) 568 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 569 else 570 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true); 571 if (!msg) 572 return -ENOMEM; 573 574 memset(msg->front.iov_base, 0, msg->front.iov_len); 575 req->r_request = msg; 576 577 /* create reply message */ 578 msg_size = OSD_OPREPLY_FRONT_LEN; 579 msg_size += req->r_base_oid.name_len; 580 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 581 582 if (req->r_mempool) 583 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 584 else 585 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true); 586 if (!msg) 587 return -ENOMEM; 588 589 req->r_reply = msg; 590 591 return 0; 592 } 593 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 594 595 static bool osd_req_opcode_valid(u16 opcode) 596 { 597 switch (opcode) { 598 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 599 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 600 #undef GENERATE_CASE 601 default: 602 return false; 603 } 604 } 605 606 /* 607 * This is an osd op init function for opcodes that have no data or 608 * other information associated with them. It also serves as a 609 * common init routine for all the other init functions, below. 610 */ 611 static struct ceph_osd_req_op * 612 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 613 u16 opcode, u32 flags) 614 { 615 struct ceph_osd_req_op *op; 616 617 BUG_ON(which >= osd_req->r_num_ops); 618 BUG_ON(!osd_req_opcode_valid(opcode)); 619 620 op = &osd_req->r_ops[which]; 621 memset(op, 0, sizeof (*op)); 622 op->op = opcode; 623 op->flags = flags; 624 625 return op; 626 } 627 628 void osd_req_op_init(struct ceph_osd_request *osd_req, 629 unsigned int which, u16 opcode, u32 flags) 630 { 631 (void)_osd_req_op_init(osd_req, which, opcode, flags); 632 } 633 EXPORT_SYMBOL(osd_req_op_init); 634 635 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 636 unsigned int which, u16 opcode, 637 u64 offset, u64 length, 638 u64 truncate_size, u32 truncate_seq) 639 { 640 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 641 opcode, 0); 642 size_t payload_len = 0; 643 644 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 645 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 646 opcode != CEPH_OSD_OP_TRUNCATE); 647 648 op->extent.offset = offset; 649 op->extent.length = length; 650 op->extent.truncate_size = truncate_size; 651 op->extent.truncate_seq = truncate_seq; 652 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 653 payload_len += length; 654 655 op->indata_len = payload_len; 656 } 657 EXPORT_SYMBOL(osd_req_op_extent_init); 658 659 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 660 unsigned int which, u64 length) 661 { 662 struct ceph_osd_req_op *op; 663 u64 previous; 664 665 BUG_ON(which >= osd_req->r_num_ops); 666 op = &osd_req->r_ops[which]; 667 previous = op->extent.length; 668 669 if (length == previous) 670 return; /* Nothing to do */ 671 BUG_ON(length > previous); 672 673 op->extent.length = length; 674 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 675 op->indata_len -= previous - length; 676 } 677 EXPORT_SYMBOL(osd_req_op_extent_update); 678 679 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 680 unsigned int which, u64 offset_inc) 681 { 682 struct ceph_osd_req_op *op, *prev_op; 683 684 BUG_ON(which + 1 >= osd_req->r_num_ops); 685 686 prev_op = &osd_req->r_ops[which]; 687 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 688 /* dup previous one */ 689 op->indata_len = prev_op->indata_len; 690 op->outdata_len = prev_op->outdata_len; 691 op->extent = prev_op->extent; 692 /* adjust offset */ 693 op->extent.offset += offset_inc; 694 op->extent.length -= offset_inc; 695 696 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 697 op->indata_len -= offset_inc; 698 } 699 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 700 701 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 702 u16 opcode, const char *class, const char *method) 703 { 704 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 705 opcode, 0); 706 struct ceph_pagelist *pagelist; 707 size_t payload_len = 0; 708 size_t size; 709 710 BUG_ON(opcode != CEPH_OSD_OP_CALL); 711 712 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 713 BUG_ON(!pagelist); 714 ceph_pagelist_init(pagelist); 715 716 op->cls.class_name = class; 717 size = strlen(class); 718 BUG_ON(size > (size_t) U8_MAX); 719 op->cls.class_len = size; 720 ceph_pagelist_append(pagelist, class, size); 721 payload_len += size; 722 723 op->cls.method_name = method; 724 size = strlen(method); 725 BUG_ON(size > (size_t) U8_MAX); 726 op->cls.method_len = size; 727 ceph_pagelist_append(pagelist, method, size); 728 payload_len += size; 729 730 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 731 732 op->indata_len = payload_len; 733 } 734 EXPORT_SYMBOL(osd_req_op_cls_init); 735 736 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 737 u16 opcode, const char *name, const void *value, 738 size_t size, u8 cmp_op, u8 cmp_mode) 739 { 740 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 741 opcode, 0); 742 struct ceph_pagelist *pagelist; 743 size_t payload_len; 744 745 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 746 747 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 748 if (!pagelist) 749 return -ENOMEM; 750 751 ceph_pagelist_init(pagelist); 752 753 payload_len = strlen(name); 754 op->xattr.name_len = payload_len; 755 ceph_pagelist_append(pagelist, name, payload_len); 756 757 op->xattr.value_len = size; 758 ceph_pagelist_append(pagelist, value, size); 759 payload_len += size; 760 761 op->xattr.cmp_op = cmp_op; 762 op->xattr.cmp_mode = cmp_mode; 763 764 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 765 op->indata_len = payload_len; 766 return 0; 767 } 768 EXPORT_SYMBOL(osd_req_op_xattr_init); 769 770 /* 771 * @watch_opcode: CEPH_OSD_WATCH_OP_* 772 */ 773 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 774 u64 cookie, u8 watch_opcode) 775 { 776 struct ceph_osd_req_op *op; 777 778 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 779 op->watch.cookie = cookie; 780 op->watch.op = watch_opcode; 781 op->watch.gen = 0; 782 } 783 784 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 785 unsigned int which, 786 u64 expected_object_size, 787 u64 expected_write_size) 788 { 789 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 790 CEPH_OSD_OP_SETALLOCHINT, 791 0); 792 793 op->alloc_hint.expected_object_size = expected_object_size; 794 op->alloc_hint.expected_write_size = expected_write_size; 795 796 /* 797 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 798 * not worth a feature bit. Set FAILOK per-op flag to make 799 * sure older osds don't trip over an unsupported opcode. 800 */ 801 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 802 } 803 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 804 805 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 806 struct ceph_osd_data *osd_data) 807 { 808 u64 length = ceph_osd_data_length(osd_data); 809 810 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 811 BUG_ON(length > (u64) SIZE_MAX); 812 if (length) 813 ceph_msg_data_add_pages(msg, osd_data->pages, 814 length, osd_data->alignment); 815 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 816 BUG_ON(!length); 817 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 818 #ifdef CONFIG_BLOCK 819 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 820 ceph_msg_data_add_bio(msg, osd_data->bio, length); 821 #endif 822 } else { 823 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 824 } 825 } 826 827 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 828 const struct ceph_osd_req_op *src) 829 { 830 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 831 pr_err("unrecognized osd opcode %d\n", src->op); 832 833 return 0; 834 } 835 836 switch (src->op) { 837 case CEPH_OSD_OP_STAT: 838 break; 839 case CEPH_OSD_OP_READ: 840 case CEPH_OSD_OP_WRITE: 841 case CEPH_OSD_OP_WRITEFULL: 842 case CEPH_OSD_OP_ZERO: 843 case CEPH_OSD_OP_TRUNCATE: 844 dst->extent.offset = cpu_to_le64(src->extent.offset); 845 dst->extent.length = cpu_to_le64(src->extent.length); 846 dst->extent.truncate_size = 847 cpu_to_le64(src->extent.truncate_size); 848 dst->extent.truncate_seq = 849 cpu_to_le32(src->extent.truncate_seq); 850 break; 851 case CEPH_OSD_OP_CALL: 852 dst->cls.class_len = src->cls.class_len; 853 dst->cls.method_len = src->cls.method_len; 854 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 855 break; 856 case CEPH_OSD_OP_STARTSYNC: 857 break; 858 case CEPH_OSD_OP_WATCH: 859 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 860 dst->watch.ver = cpu_to_le64(0); 861 dst->watch.op = src->watch.op; 862 dst->watch.gen = cpu_to_le32(src->watch.gen); 863 break; 864 case CEPH_OSD_OP_NOTIFY_ACK: 865 break; 866 case CEPH_OSD_OP_NOTIFY: 867 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 868 break; 869 case CEPH_OSD_OP_LIST_WATCHERS: 870 break; 871 case CEPH_OSD_OP_SETALLOCHINT: 872 dst->alloc_hint.expected_object_size = 873 cpu_to_le64(src->alloc_hint.expected_object_size); 874 dst->alloc_hint.expected_write_size = 875 cpu_to_le64(src->alloc_hint.expected_write_size); 876 break; 877 case CEPH_OSD_OP_SETXATTR: 878 case CEPH_OSD_OP_CMPXATTR: 879 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 880 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 881 dst->xattr.cmp_op = src->xattr.cmp_op; 882 dst->xattr.cmp_mode = src->xattr.cmp_mode; 883 break; 884 case CEPH_OSD_OP_CREATE: 885 case CEPH_OSD_OP_DELETE: 886 break; 887 default: 888 pr_err("unsupported osd opcode %s\n", 889 ceph_osd_op_name(src->op)); 890 WARN_ON(1); 891 892 return 0; 893 } 894 895 dst->op = cpu_to_le16(src->op); 896 dst->flags = cpu_to_le32(src->flags); 897 dst->payload_len = cpu_to_le32(src->indata_len); 898 899 return src->indata_len; 900 } 901 902 /* 903 * build new request AND message, calculate layout, and adjust file 904 * extent as needed. 905 * 906 * if the file was recently truncated, we include information about its 907 * old and new size so that the object can be updated appropriately. (we 908 * avoid synchronously deleting truncated objects because it's slow.) 909 * 910 * if @do_sync, include a 'startsync' command so that the osd will flush 911 * data quickly. 912 */ 913 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 914 struct ceph_file_layout *layout, 915 struct ceph_vino vino, 916 u64 off, u64 *plen, 917 unsigned int which, int num_ops, 918 int opcode, int flags, 919 struct ceph_snap_context *snapc, 920 u32 truncate_seq, 921 u64 truncate_size, 922 bool use_mempool) 923 { 924 struct ceph_osd_request *req; 925 u64 objnum = 0; 926 u64 objoff = 0; 927 u64 objlen = 0; 928 int r; 929 930 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 931 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 932 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 933 934 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 935 GFP_NOFS); 936 if (!req) { 937 r = -ENOMEM; 938 goto fail; 939 } 940 941 /* calculate max write size */ 942 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 943 if (r) 944 goto fail; 945 946 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 947 osd_req_op_init(req, which, opcode, 0); 948 } else { 949 u32 object_size = layout->object_size; 950 u32 object_base = off - objoff; 951 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 952 if (truncate_size <= object_base) { 953 truncate_size = 0; 954 } else { 955 truncate_size -= object_base; 956 if (truncate_size > object_size) 957 truncate_size = object_size; 958 } 959 } 960 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 961 truncate_size, truncate_seq); 962 } 963 964 req->r_flags = flags; 965 req->r_base_oloc.pool = layout->pool_id; 966 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); 967 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 968 969 req->r_snapid = vino.snap; 970 if (flags & CEPH_OSD_FLAG_WRITE) 971 req->r_data_offset = off; 972 973 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 974 if (r) 975 goto fail; 976 977 return req; 978 979 fail: 980 ceph_osdc_put_request(req); 981 return ERR_PTR(r); 982 } 983 EXPORT_SYMBOL(ceph_osdc_new_request); 984 985 /* 986 * We keep osd requests in an rbtree, sorted by ->r_tid. 987 */ 988 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 989 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 990 991 static bool osd_homeless(struct ceph_osd *osd) 992 { 993 return osd->o_osd == CEPH_HOMELESS_OSD; 994 } 995 996 static bool osd_registered(struct ceph_osd *osd) 997 { 998 verify_osdc_locked(osd->o_osdc); 999 1000 return !RB_EMPTY_NODE(&osd->o_node); 1001 } 1002 1003 /* 1004 * Assumes @osd is zero-initialized. 1005 */ 1006 static void osd_init(struct ceph_osd *osd) 1007 { 1008 atomic_set(&osd->o_ref, 1); 1009 RB_CLEAR_NODE(&osd->o_node); 1010 osd->o_requests = RB_ROOT; 1011 osd->o_linger_requests = RB_ROOT; 1012 INIT_LIST_HEAD(&osd->o_osd_lru); 1013 INIT_LIST_HEAD(&osd->o_keepalive_item); 1014 osd->o_incarnation = 1; 1015 mutex_init(&osd->lock); 1016 } 1017 1018 static void osd_cleanup(struct ceph_osd *osd) 1019 { 1020 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1021 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1022 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1023 WARN_ON(!list_empty(&osd->o_osd_lru)); 1024 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1025 1026 if (osd->o_auth.authorizer) { 1027 WARN_ON(osd_homeless(osd)); 1028 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1029 } 1030 } 1031 1032 /* 1033 * Track open sessions with osds. 1034 */ 1035 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1036 { 1037 struct ceph_osd *osd; 1038 1039 WARN_ON(onum == CEPH_HOMELESS_OSD); 1040 1041 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1042 osd_init(osd); 1043 osd->o_osdc = osdc; 1044 osd->o_osd = onum; 1045 1046 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1047 1048 return osd; 1049 } 1050 1051 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1052 { 1053 if (atomic_inc_not_zero(&osd->o_ref)) { 1054 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, 1055 atomic_read(&osd->o_ref)); 1056 return osd; 1057 } else { 1058 dout("get_osd %p FAIL\n", osd); 1059 return NULL; 1060 } 1061 } 1062 1063 static void put_osd(struct ceph_osd *osd) 1064 { 1065 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), 1066 atomic_read(&osd->o_ref) - 1); 1067 if (atomic_dec_and_test(&osd->o_ref)) { 1068 osd_cleanup(osd); 1069 kfree(osd); 1070 } 1071 } 1072 1073 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1074 1075 static void __move_osd_to_lru(struct ceph_osd *osd) 1076 { 1077 struct ceph_osd_client *osdc = osd->o_osdc; 1078 1079 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1080 BUG_ON(!list_empty(&osd->o_osd_lru)); 1081 1082 spin_lock(&osdc->osd_lru_lock); 1083 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1084 spin_unlock(&osdc->osd_lru_lock); 1085 1086 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1087 } 1088 1089 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1090 { 1091 if (RB_EMPTY_ROOT(&osd->o_requests) && 1092 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1093 __move_osd_to_lru(osd); 1094 } 1095 1096 static void __remove_osd_from_lru(struct ceph_osd *osd) 1097 { 1098 struct ceph_osd_client *osdc = osd->o_osdc; 1099 1100 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1101 1102 spin_lock(&osdc->osd_lru_lock); 1103 if (!list_empty(&osd->o_osd_lru)) 1104 list_del_init(&osd->o_osd_lru); 1105 spin_unlock(&osdc->osd_lru_lock); 1106 } 1107 1108 /* 1109 * Close the connection and assign any leftover requests to the 1110 * homeless session. 1111 */ 1112 static void close_osd(struct ceph_osd *osd) 1113 { 1114 struct ceph_osd_client *osdc = osd->o_osdc; 1115 struct rb_node *n; 1116 1117 verify_osdc_wrlocked(osdc); 1118 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1119 1120 ceph_con_close(&osd->o_con); 1121 1122 for (n = rb_first(&osd->o_requests); n; ) { 1123 struct ceph_osd_request *req = 1124 rb_entry(n, struct ceph_osd_request, r_node); 1125 1126 n = rb_next(n); /* unlink_request() */ 1127 1128 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1129 unlink_request(osd, req); 1130 link_request(&osdc->homeless_osd, req); 1131 } 1132 for (n = rb_first(&osd->o_linger_requests); n; ) { 1133 struct ceph_osd_linger_request *lreq = 1134 rb_entry(n, struct ceph_osd_linger_request, node); 1135 1136 n = rb_next(n); /* unlink_linger() */ 1137 1138 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1139 lreq->linger_id); 1140 unlink_linger(osd, lreq); 1141 link_linger(&osdc->homeless_osd, lreq); 1142 } 1143 1144 __remove_osd_from_lru(osd); 1145 erase_osd(&osdc->osds, osd); 1146 put_osd(osd); 1147 } 1148 1149 /* 1150 * reset osd connect 1151 */ 1152 static int reopen_osd(struct ceph_osd *osd) 1153 { 1154 struct ceph_entity_addr *peer_addr; 1155 1156 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1157 1158 if (RB_EMPTY_ROOT(&osd->o_requests) && 1159 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1160 close_osd(osd); 1161 return -ENODEV; 1162 } 1163 1164 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1165 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1166 !ceph_con_opened(&osd->o_con)) { 1167 struct rb_node *n; 1168 1169 dout("osd addr hasn't changed and connection never opened, " 1170 "letting msgr retry\n"); 1171 /* touch each r_stamp for handle_timeout()'s benfit */ 1172 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1173 struct ceph_osd_request *req = 1174 rb_entry(n, struct ceph_osd_request, r_node); 1175 req->r_stamp = jiffies; 1176 } 1177 1178 return -EAGAIN; 1179 } 1180 1181 ceph_con_close(&osd->o_con); 1182 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1183 osd->o_incarnation++; 1184 1185 return 0; 1186 } 1187 1188 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1189 bool wrlocked) 1190 { 1191 struct ceph_osd *osd; 1192 1193 if (wrlocked) 1194 verify_osdc_wrlocked(osdc); 1195 else 1196 verify_osdc_locked(osdc); 1197 1198 if (o != CEPH_HOMELESS_OSD) 1199 osd = lookup_osd(&osdc->osds, o); 1200 else 1201 osd = &osdc->homeless_osd; 1202 if (!osd) { 1203 if (!wrlocked) 1204 return ERR_PTR(-EAGAIN); 1205 1206 osd = create_osd(osdc, o); 1207 insert_osd(&osdc->osds, osd); 1208 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1209 &osdc->osdmap->osd_addr[osd->o_osd]); 1210 } 1211 1212 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1213 return osd; 1214 } 1215 1216 /* 1217 * Create request <-> OSD session relation. 1218 * 1219 * @req has to be assigned a tid, @osd may be homeless. 1220 */ 1221 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1222 { 1223 verify_osd_locked(osd); 1224 WARN_ON(!req->r_tid || req->r_osd); 1225 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1226 req, req->r_tid); 1227 1228 if (!osd_homeless(osd)) 1229 __remove_osd_from_lru(osd); 1230 else 1231 atomic_inc(&osd->o_osdc->num_homeless); 1232 1233 get_osd(osd); 1234 insert_request(&osd->o_requests, req); 1235 req->r_osd = osd; 1236 } 1237 1238 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1239 { 1240 verify_osd_locked(osd); 1241 WARN_ON(req->r_osd != osd); 1242 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1243 req, req->r_tid); 1244 1245 req->r_osd = NULL; 1246 erase_request(&osd->o_requests, req); 1247 put_osd(osd); 1248 1249 if (!osd_homeless(osd)) 1250 maybe_move_osd_to_lru(osd); 1251 else 1252 atomic_dec(&osd->o_osdc->num_homeless); 1253 } 1254 1255 static bool __pool_full(struct ceph_pg_pool_info *pi) 1256 { 1257 return pi->flags & CEPH_POOL_FLAG_FULL; 1258 } 1259 1260 static bool have_pool_full(struct ceph_osd_client *osdc) 1261 { 1262 struct rb_node *n; 1263 1264 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1265 struct ceph_pg_pool_info *pi = 1266 rb_entry(n, struct ceph_pg_pool_info, node); 1267 1268 if (__pool_full(pi)) 1269 return true; 1270 } 1271 1272 return false; 1273 } 1274 1275 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1276 { 1277 struct ceph_pg_pool_info *pi; 1278 1279 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1280 if (!pi) 1281 return false; 1282 1283 return __pool_full(pi); 1284 } 1285 1286 /* 1287 * Returns whether a request should be blocked from being sent 1288 * based on the current osdmap and osd_client settings. 1289 */ 1290 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1291 const struct ceph_osd_request_target *t, 1292 struct ceph_pg_pool_info *pi) 1293 { 1294 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1295 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1296 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1297 __pool_full(pi); 1298 1299 WARN_ON(pi->id != t->base_oloc.pool); 1300 return (t->flags & CEPH_OSD_FLAG_READ && pauserd) || 1301 (t->flags & CEPH_OSD_FLAG_WRITE && pausewr); 1302 } 1303 1304 enum calc_target_result { 1305 CALC_TARGET_NO_ACTION = 0, 1306 CALC_TARGET_NEED_RESEND, 1307 CALC_TARGET_POOL_DNE, 1308 }; 1309 1310 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1311 struct ceph_osd_request_target *t, 1312 u32 *last_force_resend, 1313 bool any_change) 1314 { 1315 struct ceph_pg_pool_info *pi; 1316 struct ceph_pg pgid, last_pgid; 1317 struct ceph_osds up, acting; 1318 bool force_resend = false; 1319 bool need_check_tiering = false; 1320 bool need_resend = false; 1321 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1322 enum calc_target_result ct_res; 1323 int ret; 1324 1325 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1326 if (!pi) { 1327 t->osd = CEPH_HOMELESS_OSD; 1328 ct_res = CALC_TARGET_POOL_DNE; 1329 goto out; 1330 } 1331 1332 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1333 if (last_force_resend && 1334 *last_force_resend < pi->last_force_request_resend) { 1335 *last_force_resend = pi->last_force_request_resend; 1336 force_resend = true; 1337 } else if (!last_force_resend) { 1338 force_resend = true; 1339 } 1340 } 1341 if (ceph_oid_empty(&t->target_oid) || force_resend) { 1342 ceph_oid_copy(&t->target_oid, &t->base_oid); 1343 need_check_tiering = true; 1344 } 1345 if (ceph_oloc_empty(&t->target_oloc) || force_resend) { 1346 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1347 need_check_tiering = true; 1348 } 1349 1350 if (need_check_tiering && 1351 (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1352 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) 1353 t->target_oloc.pool = pi->read_tier; 1354 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) 1355 t->target_oloc.pool = pi->write_tier; 1356 } 1357 1358 ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid, 1359 &t->target_oloc, &pgid); 1360 if (ret) { 1361 WARN_ON(ret != -ENOENT); 1362 t->osd = CEPH_HOMELESS_OSD; 1363 ct_res = CALC_TARGET_POOL_DNE; 1364 goto out; 1365 } 1366 last_pgid.pool = pgid.pool; 1367 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1368 1369 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting); 1370 if (any_change && 1371 ceph_is_new_interval(&t->acting, 1372 &acting, 1373 &t->up, 1374 &up, 1375 t->size, 1376 pi->size, 1377 t->min_size, 1378 pi->min_size, 1379 t->pg_num, 1380 pi->pg_num, 1381 t->sort_bitwise, 1382 sort_bitwise, 1383 &last_pgid)) 1384 force_resend = true; 1385 1386 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1387 t->paused = false; 1388 need_resend = true; 1389 } 1390 1391 if (ceph_pg_compare(&t->pgid, &pgid) || 1392 ceph_osds_changed(&t->acting, &acting, any_change) || 1393 force_resend) { 1394 t->pgid = pgid; /* struct */ 1395 ceph_osds_copy(&t->acting, &acting); 1396 ceph_osds_copy(&t->up, &up); 1397 t->size = pi->size; 1398 t->min_size = pi->min_size; 1399 t->pg_num = pi->pg_num; 1400 t->pg_num_mask = pi->pg_num_mask; 1401 t->sort_bitwise = sort_bitwise; 1402 1403 t->osd = acting.primary; 1404 need_resend = true; 1405 } 1406 1407 ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION; 1408 out: 1409 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd); 1410 return ct_res; 1411 } 1412 1413 static void setup_request_data(struct ceph_osd_request *req, 1414 struct ceph_msg *msg) 1415 { 1416 u32 data_len = 0; 1417 int i; 1418 1419 if (!list_empty(&msg->data)) 1420 return; 1421 1422 WARN_ON(msg->data_length); 1423 for (i = 0; i < req->r_num_ops; i++) { 1424 struct ceph_osd_req_op *op = &req->r_ops[i]; 1425 1426 switch (op->op) { 1427 /* request */ 1428 case CEPH_OSD_OP_WRITE: 1429 case CEPH_OSD_OP_WRITEFULL: 1430 WARN_ON(op->indata_len != op->extent.length); 1431 ceph_osdc_msg_data_add(msg, &op->extent.osd_data); 1432 break; 1433 case CEPH_OSD_OP_SETXATTR: 1434 case CEPH_OSD_OP_CMPXATTR: 1435 WARN_ON(op->indata_len != op->xattr.name_len + 1436 op->xattr.value_len); 1437 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data); 1438 break; 1439 case CEPH_OSD_OP_NOTIFY_ACK: 1440 ceph_osdc_msg_data_add(msg, 1441 &op->notify_ack.request_data); 1442 break; 1443 1444 /* reply */ 1445 case CEPH_OSD_OP_STAT: 1446 ceph_osdc_msg_data_add(req->r_reply, 1447 &op->raw_data_in); 1448 break; 1449 case CEPH_OSD_OP_READ: 1450 ceph_osdc_msg_data_add(req->r_reply, 1451 &op->extent.osd_data); 1452 break; 1453 case CEPH_OSD_OP_LIST_WATCHERS: 1454 ceph_osdc_msg_data_add(req->r_reply, 1455 &op->list_watchers.response_data); 1456 break; 1457 1458 /* both */ 1459 case CEPH_OSD_OP_CALL: 1460 WARN_ON(op->indata_len != op->cls.class_len + 1461 op->cls.method_len + 1462 op->cls.indata_len); 1463 ceph_osdc_msg_data_add(msg, &op->cls.request_info); 1464 /* optional, can be NONE */ 1465 ceph_osdc_msg_data_add(msg, &op->cls.request_data); 1466 /* optional, can be NONE */ 1467 ceph_osdc_msg_data_add(req->r_reply, 1468 &op->cls.response_data); 1469 break; 1470 case CEPH_OSD_OP_NOTIFY: 1471 ceph_osdc_msg_data_add(msg, 1472 &op->notify.request_data); 1473 ceph_osdc_msg_data_add(req->r_reply, 1474 &op->notify.response_data); 1475 break; 1476 } 1477 1478 data_len += op->indata_len; 1479 } 1480 1481 WARN_ON(data_len != msg->data_length); 1482 } 1483 1484 static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg) 1485 { 1486 void *p = msg->front.iov_base; 1487 void *const end = p + msg->front_alloc_len; 1488 u32 data_len = 0; 1489 int i; 1490 1491 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 1492 /* snapshots aren't writeable */ 1493 WARN_ON(req->r_snapid != CEPH_NOSNAP); 1494 } else { 1495 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 1496 req->r_data_offset || req->r_snapc); 1497 } 1498 1499 setup_request_data(req, msg); 1500 1501 ceph_encode_32(&p, 1); /* client_inc, always 1 */ 1502 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 1503 ceph_encode_32(&p, req->r_flags); 1504 ceph_encode_timespec(p, &req->r_mtime); 1505 p += sizeof(struct ceph_timespec); 1506 /* aka reassert_version */ 1507 memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version)); 1508 p += sizeof(req->r_replay_version); 1509 1510 /* oloc */ 1511 ceph_start_encoding(&p, 5, 4, 1512 ceph_oloc_encoding_size(&req->r_t.target_oloc)); 1513 ceph_encode_64(&p, req->r_t.target_oloc.pool); 1514 ceph_encode_32(&p, -1); /* preferred */ 1515 ceph_encode_32(&p, 0); /* key len */ 1516 if (req->r_t.target_oloc.pool_ns) 1517 ceph_encode_string(&p, end, req->r_t.target_oloc.pool_ns->str, 1518 req->r_t.target_oloc.pool_ns->len); 1519 else 1520 ceph_encode_32(&p, 0); 1521 1522 /* pgid */ 1523 ceph_encode_8(&p, 1); 1524 ceph_encode_64(&p, req->r_t.pgid.pool); 1525 ceph_encode_32(&p, req->r_t.pgid.seed); 1526 ceph_encode_32(&p, -1); /* preferred */ 1527 1528 /* oid */ 1529 ceph_encode_32(&p, req->r_t.target_oid.name_len); 1530 memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len); 1531 p += req->r_t.target_oid.name_len; 1532 1533 /* ops, can imply data */ 1534 ceph_encode_16(&p, req->r_num_ops); 1535 for (i = 0; i < req->r_num_ops; i++) { 1536 data_len += osd_req_encode_op(p, &req->r_ops[i]); 1537 p += sizeof(struct ceph_osd_op); 1538 } 1539 1540 ceph_encode_64(&p, req->r_snapid); /* snapid */ 1541 if (req->r_snapc) { 1542 ceph_encode_64(&p, req->r_snapc->seq); 1543 ceph_encode_32(&p, req->r_snapc->num_snaps); 1544 for (i = 0; i < req->r_snapc->num_snaps; i++) 1545 ceph_encode_64(&p, req->r_snapc->snaps[i]); 1546 } else { 1547 ceph_encode_64(&p, 0); /* snap_seq */ 1548 ceph_encode_32(&p, 0); /* snaps len */ 1549 } 1550 1551 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 1552 1553 BUG_ON(p > end); 1554 msg->front.iov_len = p - msg->front.iov_base; 1555 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 1556 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 1557 msg->hdr.data_len = cpu_to_le32(data_len); 1558 /* 1559 * The header "data_off" is a hint to the receiver allowing it 1560 * to align received data into its buffers such that there's no 1561 * need to re-copy it before writing it to disk (direct I/O). 1562 */ 1563 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 1564 1565 dout("%s req %p oid %s oid_len %d front %zu data %u\n", __func__, 1566 req, req->r_t.target_oid.name, req->r_t.target_oid.name_len, 1567 msg->front.iov_len, data_len); 1568 } 1569 1570 /* 1571 * @req has to be assigned a tid and registered. 1572 */ 1573 static void send_request(struct ceph_osd_request *req) 1574 { 1575 struct ceph_osd *osd = req->r_osd; 1576 1577 verify_osd_locked(osd); 1578 WARN_ON(osd->o_osd != req->r_t.osd); 1579 1580 /* 1581 * We may have a previously queued request message hanging 1582 * around. Cancel it to avoid corrupting the msgr. 1583 */ 1584 if (req->r_sent) 1585 ceph_msg_revoke(req->r_request); 1586 1587 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 1588 if (req->r_attempts) 1589 req->r_flags |= CEPH_OSD_FLAG_RETRY; 1590 else 1591 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 1592 1593 encode_request(req, req->r_request); 1594 1595 dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n", 1596 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 1597 req->r_t.osd, req->r_flags, req->r_attempts); 1598 1599 req->r_t.paused = false; 1600 req->r_stamp = jiffies; 1601 req->r_attempts++; 1602 1603 req->r_sent = osd->o_incarnation; 1604 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 1605 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 1606 } 1607 1608 static void maybe_request_map(struct ceph_osd_client *osdc) 1609 { 1610 bool continuous = false; 1611 1612 verify_osdc_locked(osdc); 1613 WARN_ON(!osdc->osdmap->epoch); 1614 1615 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1616 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 1617 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 1618 dout("%s osdc %p continuous\n", __func__, osdc); 1619 continuous = true; 1620 } else { 1621 dout("%s osdc %p onetime\n", __func__, osdc); 1622 } 1623 1624 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 1625 osdc->osdmap->epoch + 1, continuous)) 1626 ceph_monc_renew_subs(&osdc->client->monc); 1627 } 1628 1629 static void send_map_check(struct ceph_osd_request *req); 1630 1631 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 1632 { 1633 struct ceph_osd_client *osdc = req->r_osdc; 1634 struct ceph_osd *osd; 1635 enum calc_target_result ct_res; 1636 bool need_send = false; 1637 bool promoted = false; 1638 1639 WARN_ON(req->r_tid); 1640 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 1641 1642 again: 1643 ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, false); 1644 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 1645 goto promote; 1646 1647 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 1648 if (IS_ERR(osd)) { 1649 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 1650 goto promote; 1651 } 1652 1653 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1654 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 1655 dout("req %p pausewr\n", req); 1656 req->r_t.paused = true; 1657 maybe_request_map(osdc); 1658 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1659 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 1660 dout("req %p pauserd\n", req); 1661 req->r_t.paused = true; 1662 maybe_request_map(osdc); 1663 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1664 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 1665 CEPH_OSD_FLAG_FULL_FORCE)) && 1666 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1667 pool_full(osdc, req->r_t.base_oloc.pool))) { 1668 dout("req %p full/pool_full\n", req); 1669 pr_warn_ratelimited("FULL or reached pool quota\n"); 1670 req->r_t.paused = true; 1671 maybe_request_map(osdc); 1672 } else if (!osd_homeless(osd)) { 1673 need_send = true; 1674 } else { 1675 maybe_request_map(osdc); 1676 } 1677 1678 mutex_lock(&osd->lock); 1679 /* 1680 * Assign the tid atomically with send_request() to protect 1681 * multiple writes to the same object from racing with each 1682 * other, resulting in out of order ops on the OSDs. 1683 */ 1684 req->r_tid = atomic64_inc_return(&osdc->last_tid); 1685 link_request(osd, req); 1686 if (need_send) 1687 send_request(req); 1688 mutex_unlock(&osd->lock); 1689 1690 if (ct_res == CALC_TARGET_POOL_DNE) 1691 send_map_check(req); 1692 1693 if (promoted) 1694 downgrade_write(&osdc->lock); 1695 return; 1696 1697 promote: 1698 up_read(&osdc->lock); 1699 down_write(&osdc->lock); 1700 wrlocked = true; 1701 promoted = true; 1702 goto again; 1703 } 1704 1705 static void account_request(struct ceph_osd_request *req) 1706 { 1707 WARN_ON(req->r_flags & CEPH_OSD_FLAG_ACK); 1708 WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE))); 1709 1710 req->r_flags |= CEPH_OSD_FLAG_ONDISK; 1711 atomic_inc(&req->r_osdc->num_requests); 1712 } 1713 1714 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 1715 { 1716 ceph_osdc_get_request(req); 1717 account_request(req); 1718 __submit_request(req, wrlocked); 1719 } 1720 1721 static void finish_request(struct ceph_osd_request *req) 1722 { 1723 struct ceph_osd_client *osdc = req->r_osdc; 1724 struct ceph_osd *osd = req->r_osd; 1725 1726 verify_osd_locked(osd); 1727 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1728 1729 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 1730 unlink_request(osd, req); 1731 atomic_dec(&osdc->num_requests); 1732 1733 /* 1734 * If an OSD has failed or returned and a request has been sent 1735 * twice, it's possible to get a reply and end up here while the 1736 * request message is queued for delivery. We will ignore the 1737 * reply, so not a big deal, but better to try and catch it. 1738 */ 1739 ceph_msg_revoke(req->r_request); 1740 ceph_msg_revoke_incoming(req->r_reply); 1741 } 1742 1743 static void __complete_request(struct ceph_osd_request *req) 1744 { 1745 if (req->r_callback) { 1746 dout("%s req %p tid %llu cb %pf result %d\n", __func__, req, 1747 req->r_tid, req->r_callback, req->r_result); 1748 req->r_callback(req); 1749 } 1750 } 1751 1752 /* 1753 * This is open-coded in handle_reply(). 1754 */ 1755 static void complete_request(struct ceph_osd_request *req, int err) 1756 { 1757 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 1758 1759 req->r_result = err; 1760 finish_request(req); 1761 __complete_request(req); 1762 complete_all(&req->r_completion); 1763 ceph_osdc_put_request(req); 1764 } 1765 1766 static void cancel_map_check(struct ceph_osd_request *req) 1767 { 1768 struct ceph_osd_client *osdc = req->r_osdc; 1769 struct ceph_osd_request *lookup_req; 1770 1771 verify_osdc_wrlocked(osdc); 1772 1773 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1774 if (!lookup_req) 1775 return; 1776 1777 WARN_ON(lookup_req != req); 1778 erase_request_mc(&osdc->map_checks, req); 1779 ceph_osdc_put_request(req); 1780 } 1781 1782 static void cancel_request(struct ceph_osd_request *req) 1783 { 1784 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1785 1786 cancel_map_check(req); 1787 finish_request(req); 1788 complete_all(&req->r_completion); 1789 ceph_osdc_put_request(req); 1790 } 1791 1792 static void check_pool_dne(struct ceph_osd_request *req) 1793 { 1794 struct ceph_osd_client *osdc = req->r_osdc; 1795 struct ceph_osdmap *map = osdc->osdmap; 1796 1797 verify_osdc_wrlocked(osdc); 1798 WARN_ON(!map->epoch); 1799 1800 if (req->r_attempts) { 1801 /* 1802 * We sent a request earlier, which means that 1803 * previously the pool existed, and now it does not 1804 * (i.e., it was deleted). 1805 */ 1806 req->r_map_dne_bound = map->epoch; 1807 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 1808 req->r_tid); 1809 } else { 1810 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 1811 req, req->r_tid, req->r_map_dne_bound, map->epoch); 1812 } 1813 1814 if (req->r_map_dne_bound) { 1815 if (map->epoch >= req->r_map_dne_bound) { 1816 /* we had a new enough map */ 1817 pr_info_ratelimited("tid %llu pool does not exist\n", 1818 req->r_tid); 1819 complete_request(req, -ENOENT); 1820 } 1821 } else { 1822 send_map_check(req); 1823 } 1824 } 1825 1826 static void map_check_cb(struct ceph_mon_generic_request *greq) 1827 { 1828 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 1829 struct ceph_osd_request *req; 1830 u64 tid = greq->private_data; 1831 1832 WARN_ON(greq->result || !greq->u.newest); 1833 1834 down_write(&osdc->lock); 1835 req = lookup_request_mc(&osdc->map_checks, tid); 1836 if (!req) { 1837 dout("%s tid %llu dne\n", __func__, tid); 1838 goto out_unlock; 1839 } 1840 1841 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 1842 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 1843 if (!req->r_map_dne_bound) 1844 req->r_map_dne_bound = greq->u.newest; 1845 erase_request_mc(&osdc->map_checks, req); 1846 check_pool_dne(req); 1847 1848 ceph_osdc_put_request(req); 1849 out_unlock: 1850 up_write(&osdc->lock); 1851 } 1852 1853 static void send_map_check(struct ceph_osd_request *req) 1854 { 1855 struct ceph_osd_client *osdc = req->r_osdc; 1856 struct ceph_osd_request *lookup_req; 1857 int ret; 1858 1859 verify_osdc_wrlocked(osdc); 1860 1861 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1862 if (lookup_req) { 1863 WARN_ON(lookup_req != req); 1864 return; 1865 } 1866 1867 ceph_osdc_get_request(req); 1868 insert_request_mc(&osdc->map_checks, req); 1869 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 1870 map_check_cb, req->r_tid); 1871 WARN_ON(ret); 1872 } 1873 1874 /* 1875 * lingering requests, watch/notify v2 infrastructure 1876 */ 1877 static void linger_release(struct kref *kref) 1878 { 1879 struct ceph_osd_linger_request *lreq = 1880 container_of(kref, struct ceph_osd_linger_request, kref); 1881 1882 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 1883 lreq->reg_req, lreq->ping_req); 1884 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 1885 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 1886 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 1887 WARN_ON(!list_empty(&lreq->scan_item)); 1888 WARN_ON(!list_empty(&lreq->pending_lworks)); 1889 WARN_ON(lreq->osd); 1890 1891 if (lreq->reg_req) 1892 ceph_osdc_put_request(lreq->reg_req); 1893 if (lreq->ping_req) 1894 ceph_osdc_put_request(lreq->ping_req); 1895 target_destroy(&lreq->t); 1896 kfree(lreq); 1897 } 1898 1899 static void linger_put(struct ceph_osd_linger_request *lreq) 1900 { 1901 if (lreq) 1902 kref_put(&lreq->kref, linger_release); 1903 } 1904 1905 static struct ceph_osd_linger_request * 1906 linger_get(struct ceph_osd_linger_request *lreq) 1907 { 1908 kref_get(&lreq->kref); 1909 return lreq; 1910 } 1911 1912 static struct ceph_osd_linger_request * 1913 linger_alloc(struct ceph_osd_client *osdc) 1914 { 1915 struct ceph_osd_linger_request *lreq; 1916 1917 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 1918 if (!lreq) 1919 return NULL; 1920 1921 kref_init(&lreq->kref); 1922 mutex_init(&lreq->lock); 1923 RB_CLEAR_NODE(&lreq->node); 1924 RB_CLEAR_NODE(&lreq->osdc_node); 1925 RB_CLEAR_NODE(&lreq->mc_node); 1926 INIT_LIST_HEAD(&lreq->scan_item); 1927 INIT_LIST_HEAD(&lreq->pending_lworks); 1928 init_completion(&lreq->reg_commit_wait); 1929 init_completion(&lreq->notify_finish_wait); 1930 1931 lreq->osdc = osdc; 1932 target_init(&lreq->t); 1933 1934 dout("%s lreq %p\n", __func__, lreq); 1935 return lreq; 1936 } 1937 1938 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 1939 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 1940 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 1941 1942 /* 1943 * Create linger request <-> OSD session relation. 1944 * 1945 * @lreq has to be registered, @osd may be homeless. 1946 */ 1947 static void link_linger(struct ceph_osd *osd, 1948 struct ceph_osd_linger_request *lreq) 1949 { 1950 verify_osd_locked(osd); 1951 WARN_ON(!lreq->linger_id || lreq->osd); 1952 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1953 osd->o_osd, lreq, lreq->linger_id); 1954 1955 if (!osd_homeless(osd)) 1956 __remove_osd_from_lru(osd); 1957 else 1958 atomic_inc(&osd->o_osdc->num_homeless); 1959 1960 get_osd(osd); 1961 insert_linger(&osd->o_linger_requests, lreq); 1962 lreq->osd = osd; 1963 } 1964 1965 static void unlink_linger(struct ceph_osd *osd, 1966 struct ceph_osd_linger_request *lreq) 1967 { 1968 verify_osd_locked(osd); 1969 WARN_ON(lreq->osd != osd); 1970 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1971 osd->o_osd, lreq, lreq->linger_id); 1972 1973 lreq->osd = NULL; 1974 erase_linger(&osd->o_linger_requests, lreq); 1975 put_osd(osd); 1976 1977 if (!osd_homeless(osd)) 1978 maybe_move_osd_to_lru(osd); 1979 else 1980 atomic_dec(&osd->o_osdc->num_homeless); 1981 } 1982 1983 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 1984 { 1985 verify_osdc_locked(lreq->osdc); 1986 1987 return !RB_EMPTY_NODE(&lreq->osdc_node); 1988 } 1989 1990 static bool linger_registered(struct ceph_osd_linger_request *lreq) 1991 { 1992 struct ceph_osd_client *osdc = lreq->osdc; 1993 bool registered; 1994 1995 down_read(&osdc->lock); 1996 registered = __linger_registered(lreq); 1997 up_read(&osdc->lock); 1998 1999 return registered; 2000 } 2001 2002 static void linger_register(struct ceph_osd_linger_request *lreq) 2003 { 2004 struct ceph_osd_client *osdc = lreq->osdc; 2005 2006 verify_osdc_wrlocked(osdc); 2007 WARN_ON(lreq->linger_id); 2008 2009 linger_get(lreq); 2010 lreq->linger_id = ++osdc->last_linger_id; 2011 insert_linger_osdc(&osdc->linger_requests, lreq); 2012 } 2013 2014 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2015 { 2016 struct ceph_osd_client *osdc = lreq->osdc; 2017 2018 verify_osdc_wrlocked(osdc); 2019 2020 erase_linger_osdc(&osdc->linger_requests, lreq); 2021 linger_put(lreq); 2022 } 2023 2024 static void cancel_linger_request(struct ceph_osd_request *req) 2025 { 2026 struct ceph_osd_linger_request *lreq = req->r_priv; 2027 2028 WARN_ON(!req->r_linger); 2029 cancel_request(req); 2030 linger_put(lreq); 2031 } 2032 2033 struct linger_work { 2034 struct work_struct work; 2035 struct ceph_osd_linger_request *lreq; 2036 struct list_head pending_item; 2037 unsigned long queued_stamp; 2038 2039 union { 2040 struct { 2041 u64 notify_id; 2042 u64 notifier_id; 2043 void *payload; /* points into @msg front */ 2044 size_t payload_len; 2045 2046 struct ceph_msg *msg; /* for ceph_msg_put() */ 2047 } notify; 2048 struct { 2049 int err; 2050 } error; 2051 }; 2052 }; 2053 2054 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2055 work_func_t workfn) 2056 { 2057 struct linger_work *lwork; 2058 2059 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2060 if (!lwork) 2061 return NULL; 2062 2063 INIT_WORK(&lwork->work, workfn); 2064 INIT_LIST_HEAD(&lwork->pending_item); 2065 lwork->lreq = linger_get(lreq); 2066 2067 return lwork; 2068 } 2069 2070 static void lwork_free(struct linger_work *lwork) 2071 { 2072 struct ceph_osd_linger_request *lreq = lwork->lreq; 2073 2074 mutex_lock(&lreq->lock); 2075 list_del(&lwork->pending_item); 2076 mutex_unlock(&lreq->lock); 2077 2078 linger_put(lreq); 2079 kfree(lwork); 2080 } 2081 2082 static void lwork_queue(struct linger_work *lwork) 2083 { 2084 struct ceph_osd_linger_request *lreq = lwork->lreq; 2085 struct ceph_osd_client *osdc = lreq->osdc; 2086 2087 verify_lreq_locked(lreq); 2088 WARN_ON(!list_empty(&lwork->pending_item)); 2089 2090 lwork->queued_stamp = jiffies; 2091 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2092 queue_work(osdc->notify_wq, &lwork->work); 2093 } 2094 2095 static void do_watch_notify(struct work_struct *w) 2096 { 2097 struct linger_work *lwork = container_of(w, struct linger_work, work); 2098 struct ceph_osd_linger_request *lreq = lwork->lreq; 2099 2100 if (!linger_registered(lreq)) { 2101 dout("%s lreq %p not registered\n", __func__, lreq); 2102 goto out; 2103 } 2104 2105 WARN_ON(!lreq->is_watch); 2106 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2107 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2108 lwork->notify.payload_len); 2109 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2110 lwork->notify.notifier_id, lwork->notify.payload, 2111 lwork->notify.payload_len); 2112 2113 out: 2114 ceph_msg_put(lwork->notify.msg); 2115 lwork_free(lwork); 2116 } 2117 2118 static void do_watch_error(struct work_struct *w) 2119 { 2120 struct linger_work *lwork = container_of(w, struct linger_work, work); 2121 struct ceph_osd_linger_request *lreq = lwork->lreq; 2122 2123 if (!linger_registered(lreq)) { 2124 dout("%s lreq %p not registered\n", __func__, lreq); 2125 goto out; 2126 } 2127 2128 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2129 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2130 2131 out: 2132 lwork_free(lwork); 2133 } 2134 2135 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2136 { 2137 struct linger_work *lwork; 2138 2139 lwork = lwork_alloc(lreq, do_watch_error); 2140 if (!lwork) { 2141 pr_err("failed to allocate error-lwork\n"); 2142 return; 2143 } 2144 2145 lwork->error.err = lreq->last_error; 2146 lwork_queue(lwork); 2147 } 2148 2149 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2150 int result) 2151 { 2152 if (!completion_done(&lreq->reg_commit_wait)) { 2153 lreq->reg_commit_error = (result <= 0 ? result : 0); 2154 complete_all(&lreq->reg_commit_wait); 2155 } 2156 } 2157 2158 static void linger_commit_cb(struct ceph_osd_request *req) 2159 { 2160 struct ceph_osd_linger_request *lreq = req->r_priv; 2161 2162 mutex_lock(&lreq->lock); 2163 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2164 lreq->linger_id, req->r_result); 2165 linger_reg_commit_complete(lreq, req->r_result); 2166 lreq->committed = true; 2167 2168 if (!lreq->is_watch) { 2169 struct ceph_osd_data *osd_data = 2170 osd_req_op_data(req, 0, notify, response_data); 2171 void *p = page_address(osd_data->pages[0]); 2172 2173 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2174 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2175 2176 /* make note of the notify_id */ 2177 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2178 lreq->notify_id = ceph_decode_64(&p); 2179 dout("lreq %p notify_id %llu\n", lreq, 2180 lreq->notify_id); 2181 } else { 2182 dout("lreq %p no notify_id\n", lreq); 2183 } 2184 } 2185 2186 mutex_unlock(&lreq->lock); 2187 linger_put(lreq); 2188 } 2189 2190 static int normalize_watch_error(int err) 2191 { 2192 /* 2193 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2194 * notification and a failure to reconnect because we raced with 2195 * the delete appear the same to the user. 2196 */ 2197 if (err == -ENOENT) 2198 err = -ENOTCONN; 2199 2200 return err; 2201 } 2202 2203 static void linger_reconnect_cb(struct ceph_osd_request *req) 2204 { 2205 struct ceph_osd_linger_request *lreq = req->r_priv; 2206 2207 mutex_lock(&lreq->lock); 2208 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2209 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2210 if (req->r_result < 0) { 2211 if (!lreq->last_error) { 2212 lreq->last_error = normalize_watch_error(req->r_result); 2213 queue_watch_error(lreq); 2214 } 2215 } 2216 2217 mutex_unlock(&lreq->lock); 2218 linger_put(lreq); 2219 } 2220 2221 static void send_linger(struct ceph_osd_linger_request *lreq) 2222 { 2223 struct ceph_osd_request *req = lreq->reg_req; 2224 struct ceph_osd_req_op *op = &req->r_ops[0]; 2225 2226 verify_osdc_wrlocked(req->r_osdc); 2227 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2228 2229 if (req->r_osd) 2230 cancel_linger_request(req); 2231 2232 request_reinit(req); 2233 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 2234 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 2235 req->r_flags = lreq->t.flags; 2236 req->r_mtime = lreq->mtime; 2237 2238 mutex_lock(&lreq->lock); 2239 if (lreq->is_watch && lreq->committed) { 2240 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2241 op->watch.cookie != lreq->linger_id); 2242 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 2243 op->watch.gen = ++lreq->register_gen; 2244 dout("lreq %p reconnect register_gen %u\n", lreq, 2245 op->watch.gen); 2246 req->r_callback = linger_reconnect_cb; 2247 } else { 2248 if (!lreq->is_watch) 2249 lreq->notify_id = 0; 2250 else 2251 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 2252 dout("lreq %p register\n", lreq); 2253 req->r_callback = linger_commit_cb; 2254 } 2255 mutex_unlock(&lreq->lock); 2256 2257 req->r_priv = linger_get(lreq); 2258 req->r_linger = true; 2259 2260 submit_request(req, true); 2261 } 2262 2263 static void linger_ping_cb(struct ceph_osd_request *req) 2264 { 2265 struct ceph_osd_linger_request *lreq = req->r_priv; 2266 2267 mutex_lock(&lreq->lock); 2268 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 2269 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 2270 lreq->last_error); 2271 if (lreq->register_gen == req->r_ops[0].watch.gen) { 2272 if (!req->r_result) { 2273 lreq->watch_valid_thru = lreq->ping_sent; 2274 } else if (!lreq->last_error) { 2275 lreq->last_error = normalize_watch_error(req->r_result); 2276 queue_watch_error(lreq); 2277 } 2278 } else { 2279 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 2280 lreq->register_gen, req->r_ops[0].watch.gen); 2281 } 2282 2283 mutex_unlock(&lreq->lock); 2284 linger_put(lreq); 2285 } 2286 2287 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 2288 { 2289 struct ceph_osd_client *osdc = lreq->osdc; 2290 struct ceph_osd_request *req = lreq->ping_req; 2291 struct ceph_osd_req_op *op = &req->r_ops[0]; 2292 2293 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2294 dout("%s PAUSERD\n", __func__); 2295 return; 2296 } 2297 2298 lreq->ping_sent = jiffies; 2299 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 2300 __func__, lreq, lreq->linger_id, lreq->ping_sent, 2301 lreq->register_gen); 2302 2303 if (req->r_osd) 2304 cancel_linger_request(req); 2305 2306 request_reinit(req); 2307 target_copy(&req->r_t, &lreq->t); 2308 2309 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2310 op->watch.cookie != lreq->linger_id || 2311 op->watch.op != CEPH_OSD_WATCH_OP_PING); 2312 op->watch.gen = lreq->register_gen; 2313 req->r_callback = linger_ping_cb; 2314 req->r_priv = linger_get(lreq); 2315 req->r_linger = true; 2316 2317 ceph_osdc_get_request(req); 2318 account_request(req); 2319 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2320 link_request(lreq->osd, req); 2321 send_request(req); 2322 } 2323 2324 static void linger_submit(struct ceph_osd_linger_request *lreq) 2325 { 2326 struct ceph_osd_client *osdc = lreq->osdc; 2327 struct ceph_osd *osd; 2328 2329 calc_target(osdc, &lreq->t, &lreq->last_force_resend, false); 2330 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2331 link_linger(osd, lreq); 2332 2333 send_linger(lreq); 2334 } 2335 2336 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 2337 { 2338 struct ceph_osd_client *osdc = lreq->osdc; 2339 struct ceph_osd_linger_request *lookup_lreq; 2340 2341 verify_osdc_wrlocked(osdc); 2342 2343 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2344 lreq->linger_id); 2345 if (!lookup_lreq) 2346 return; 2347 2348 WARN_ON(lookup_lreq != lreq); 2349 erase_linger_mc(&osdc->linger_map_checks, lreq); 2350 linger_put(lreq); 2351 } 2352 2353 /* 2354 * @lreq has to be both registered and linked. 2355 */ 2356 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 2357 { 2358 if (lreq->is_watch && lreq->ping_req->r_osd) 2359 cancel_linger_request(lreq->ping_req); 2360 if (lreq->reg_req->r_osd) 2361 cancel_linger_request(lreq->reg_req); 2362 cancel_linger_map_check(lreq); 2363 unlink_linger(lreq->osd, lreq); 2364 linger_unregister(lreq); 2365 } 2366 2367 static void linger_cancel(struct ceph_osd_linger_request *lreq) 2368 { 2369 struct ceph_osd_client *osdc = lreq->osdc; 2370 2371 down_write(&osdc->lock); 2372 if (__linger_registered(lreq)) 2373 __linger_cancel(lreq); 2374 up_write(&osdc->lock); 2375 } 2376 2377 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 2378 2379 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 2380 { 2381 struct ceph_osd_client *osdc = lreq->osdc; 2382 struct ceph_osdmap *map = osdc->osdmap; 2383 2384 verify_osdc_wrlocked(osdc); 2385 WARN_ON(!map->epoch); 2386 2387 if (lreq->register_gen) { 2388 lreq->map_dne_bound = map->epoch; 2389 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 2390 lreq, lreq->linger_id); 2391 } else { 2392 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 2393 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2394 map->epoch); 2395 } 2396 2397 if (lreq->map_dne_bound) { 2398 if (map->epoch >= lreq->map_dne_bound) { 2399 /* we had a new enough map */ 2400 pr_info("linger_id %llu pool does not exist\n", 2401 lreq->linger_id); 2402 linger_reg_commit_complete(lreq, -ENOENT); 2403 __linger_cancel(lreq); 2404 } 2405 } else { 2406 send_linger_map_check(lreq); 2407 } 2408 } 2409 2410 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 2411 { 2412 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2413 struct ceph_osd_linger_request *lreq; 2414 u64 linger_id = greq->private_data; 2415 2416 WARN_ON(greq->result || !greq->u.newest); 2417 2418 down_write(&osdc->lock); 2419 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 2420 if (!lreq) { 2421 dout("%s linger_id %llu dne\n", __func__, linger_id); 2422 goto out_unlock; 2423 } 2424 2425 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 2426 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2427 greq->u.newest); 2428 if (!lreq->map_dne_bound) 2429 lreq->map_dne_bound = greq->u.newest; 2430 erase_linger_mc(&osdc->linger_map_checks, lreq); 2431 check_linger_pool_dne(lreq); 2432 2433 linger_put(lreq); 2434 out_unlock: 2435 up_write(&osdc->lock); 2436 } 2437 2438 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 2439 { 2440 struct ceph_osd_client *osdc = lreq->osdc; 2441 struct ceph_osd_linger_request *lookup_lreq; 2442 int ret; 2443 2444 verify_osdc_wrlocked(osdc); 2445 2446 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2447 lreq->linger_id); 2448 if (lookup_lreq) { 2449 WARN_ON(lookup_lreq != lreq); 2450 return; 2451 } 2452 2453 linger_get(lreq); 2454 insert_linger_mc(&osdc->linger_map_checks, lreq); 2455 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2456 linger_map_check_cb, lreq->linger_id); 2457 WARN_ON(ret); 2458 } 2459 2460 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 2461 { 2462 int ret; 2463 2464 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2465 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 2466 return ret ?: lreq->reg_commit_error; 2467 } 2468 2469 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 2470 { 2471 int ret; 2472 2473 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2474 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 2475 return ret ?: lreq->notify_finish_error; 2476 } 2477 2478 /* 2479 * Timeout callback, called every N seconds. When 1 or more OSD 2480 * requests has been active for more than N seconds, we send a keepalive 2481 * (tag + timestamp) to its OSD to ensure any communications channel 2482 * reset is detected. 2483 */ 2484 static void handle_timeout(struct work_struct *work) 2485 { 2486 struct ceph_osd_client *osdc = 2487 container_of(work, struct ceph_osd_client, timeout_work.work); 2488 struct ceph_options *opts = osdc->client->options; 2489 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 2490 LIST_HEAD(slow_osds); 2491 struct rb_node *n, *p; 2492 2493 dout("%s osdc %p\n", __func__, osdc); 2494 down_write(&osdc->lock); 2495 2496 /* 2497 * ping osds that are a bit slow. this ensures that if there 2498 * is a break in the TCP connection we will notice, and reopen 2499 * a connection with that osd (from the fault callback). 2500 */ 2501 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 2502 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 2503 bool found = false; 2504 2505 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 2506 struct ceph_osd_request *req = 2507 rb_entry(p, struct ceph_osd_request, r_node); 2508 2509 if (time_before(req->r_stamp, cutoff)) { 2510 dout(" req %p tid %llu on osd%d is laggy\n", 2511 req, req->r_tid, osd->o_osd); 2512 found = true; 2513 } 2514 } 2515 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 2516 struct ceph_osd_linger_request *lreq = 2517 rb_entry(p, struct ceph_osd_linger_request, node); 2518 2519 dout(" lreq %p linger_id %llu is served by osd%d\n", 2520 lreq, lreq->linger_id, osd->o_osd); 2521 found = true; 2522 2523 mutex_lock(&lreq->lock); 2524 if (lreq->is_watch && lreq->committed && !lreq->last_error) 2525 send_linger_ping(lreq); 2526 mutex_unlock(&lreq->lock); 2527 } 2528 2529 if (found) 2530 list_move_tail(&osd->o_keepalive_item, &slow_osds); 2531 } 2532 2533 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 2534 maybe_request_map(osdc); 2535 2536 while (!list_empty(&slow_osds)) { 2537 struct ceph_osd *osd = list_first_entry(&slow_osds, 2538 struct ceph_osd, 2539 o_keepalive_item); 2540 list_del_init(&osd->o_keepalive_item); 2541 ceph_con_keepalive(&osd->o_con); 2542 } 2543 2544 up_write(&osdc->lock); 2545 schedule_delayed_work(&osdc->timeout_work, 2546 osdc->client->options->osd_keepalive_timeout); 2547 } 2548 2549 static void handle_osds_timeout(struct work_struct *work) 2550 { 2551 struct ceph_osd_client *osdc = 2552 container_of(work, struct ceph_osd_client, 2553 osds_timeout_work.work); 2554 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 2555 struct ceph_osd *osd, *nosd; 2556 2557 dout("%s osdc %p\n", __func__, osdc); 2558 down_write(&osdc->lock); 2559 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 2560 if (time_before(jiffies, osd->lru_ttl)) 2561 break; 2562 2563 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 2564 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 2565 close_osd(osd); 2566 } 2567 2568 up_write(&osdc->lock); 2569 schedule_delayed_work(&osdc->osds_timeout_work, 2570 round_jiffies_relative(delay)); 2571 } 2572 2573 static int ceph_oloc_decode(void **p, void *end, 2574 struct ceph_object_locator *oloc) 2575 { 2576 u8 struct_v, struct_cv; 2577 u32 len; 2578 void *struct_end; 2579 int ret = 0; 2580 2581 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2582 struct_v = ceph_decode_8(p); 2583 struct_cv = ceph_decode_8(p); 2584 if (struct_v < 3) { 2585 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 2586 struct_v, struct_cv); 2587 goto e_inval; 2588 } 2589 if (struct_cv > 6) { 2590 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 2591 struct_v, struct_cv); 2592 goto e_inval; 2593 } 2594 len = ceph_decode_32(p); 2595 ceph_decode_need(p, end, len, e_inval); 2596 struct_end = *p + len; 2597 2598 oloc->pool = ceph_decode_64(p); 2599 *p += 4; /* skip preferred */ 2600 2601 len = ceph_decode_32(p); 2602 if (len > 0) { 2603 pr_warn("ceph_object_locator::key is set\n"); 2604 goto e_inval; 2605 } 2606 2607 if (struct_v >= 5) { 2608 bool changed = false; 2609 2610 len = ceph_decode_32(p); 2611 if (len > 0) { 2612 ceph_decode_need(p, end, len, e_inval); 2613 if (!oloc->pool_ns || 2614 ceph_compare_string(oloc->pool_ns, *p, len)) 2615 changed = true; 2616 *p += len; 2617 } else { 2618 if (oloc->pool_ns) 2619 changed = true; 2620 } 2621 if (changed) { 2622 /* redirect changes namespace */ 2623 pr_warn("ceph_object_locator::nspace is changed\n"); 2624 goto e_inval; 2625 } 2626 } 2627 2628 if (struct_v >= 6) { 2629 s64 hash = ceph_decode_64(p); 2630 if (hash != -1) { 2631 pr_warn("ceph_object_locator::hash is set\n"); 2632 goto e_inval; 2633 } 2634 } 2635 2636 /* skip the rest */ 2637 *p = struct_end; 2638 out: 2639 return ret; 2640 2641 e_inval: 2642 ret = -EINVAL; 2643 goto out; 2644 } 2645 2646 static int ceph_redirect_decode(void **p, void *end, 2647 struct ceph_request_redirect *redir) 2648 { 2649 u8 struct_v, struct_cv; 2650 u32 len; 2651 void *struct_end; 2652 int ret; 2653 2654 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2655 struct_v = ceph_decode_8(p); 2656 struct_cv = ceph_decode_8(p); 2657 if (struct_cv > 1) { 2658 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 2659 struct_v, struct_cv); 2660 goto e_inval; 2661 } 2662 len = ceph_decode_32(p); 2663 ceph_decode_need(p, end, len, e_inval); 2664 struct_end = *p + len; 2665 2666 ret = ceph_oloc_decode(p, end, &redir->oloc); 2667 if (ret) 2668 goto out; 2669 2670 len = ceph_decode_32(p); 2671 if (len > 0) { 2672 pr_warn("ceph_request_redirect::object_name is set\n"); 2673 goto e_inval; 2674 } 2675 2676 len = ceph_decode_32(p); 2677 *p += len; /* skip osd_instructions */ 2678 2679 /* skip the rest */ 2680 *p = struct_end; 2681 out: 2682 return ret; 2683 2684 e_inval: 2685 ret = -EINVAL; 2686 goto out; 2687 } 2688 2689 struct MOSDOpReply { 2690 struct ceph_pg pgid; 2691 u64 flags; 2692 int result; 2693 u32 epoch; 2694 int num_ops; 2695 u32 outdata_len[CEPH_OSD_MAX_OPS]; 2696 s32 rval[CEPH_OSD_MAX_OPS]; 2697 int retry_attempt; 2698 struct ceph_eversion replay_version; 2699 u64 user_version; 2700 struct ceph_request_redirect redirect; 2701 }; 2702 2703 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 2704 { 2705 void *p = msg->front.iov_base; 2706 void *const end = p + msg->front.iov_len; 2707 u16 version = le16_to_cpu(msg->hdr.version); 2708 struct ceph_eversion bad_replay_version; 2709 u8 decode_redir; 2710 u32 len; 2711 int ret; 2712 int i; 2713 2714 ceph_decode_32_safe(&p, end, len, e_inval); 2715 ceph_decode_need(&p, end, len, e_inval); 2716 p += len; /* skip oid */ 2717 2718 ret = ceph_decode_pgid(&p, end, &m->pgid); 2719 if (ret) 2720 return ret; 2721 2722 ceph_decode_64_safe(&p, end, m->flags, e_inval); 2723 ceph_decode_32_safe(&p, end, m->result, e_inval); 2724 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 2725 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 2726 p += sizeof(bad_replay_version); 2727 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 2728 2729 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 2730 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 2731 goto e_inval; 2732 2733 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 2734 e_inval); 2735 for (i = 0; i < m->num_ops; i++) { 2736 struct ceph_osd_op *op = p; 2737 2738 m->outdata_len[i] = le32_to_cpu(op->payload_len); 2739 p += sizeof(*op); 2740 } 2741 2742 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 2743 for (i = 0; i < m->num_ops; i++) 2744 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 2745 2746 if (version >= 5) { 2747 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 2748 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 2749 p += sizeof(m->replay_version); 2750 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 2751 } else { 2752 m->replay_version = bad_replay_version; /* struct */ 2753 m->user_version = le64_to_cpu(m->replay_version.version); 2754 } 2755 2756 if (version >= 6) { 2757 if (version >= 7) 2758 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 2759 else 2760 decode_redir = 1; 2761 } else { 2762 decode_redir = 0; 2763 } 2764 2765 if (decode_redir) { 2766 ret = ceph_redirect_decode(&p, end, &m->redirect); 2767 if (ret) 2768 return ret; 2769 } else { 2770 ceph_oloc_init(&m->redirect.oloc); 2771 } 2772 2773 return 0; 2774 2775 e_inval: 2776 return -EINVAL; 2777 } 2778 2779 /* 2780 * Handle MOSDOpReply. Set ->r_result and call the callback if it is 2781 * specified. 2782 */ 2783 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 2784 { 2785 struct ceph_osd_client *osdc = osd->o_osdc; 2786 struct ceph_osd_request *req; 2787 struct MOSDOpReply m; 2788 u64 tid = le64_to_cpu(msg->hdr.tid); 2789 u32 data_len = 0; 2790 int ret; 2791 int i; 2792 2793 dout("%s msg %p tid %llu\n", __func__, msg, tid); 2794 2795 down_read(&osdc->lock); 2796 if (!osd_registered(osd)) { 2797 dout("%s osd%d unknown\n", __func__, osd->o_osd); 2798 goto out_unlock_osdc; 2799 } 2800 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 2801 2802 mutex_lock(&osd->lock); 2803 req = lookup_request(&osd->o_requests, tid); 2804 if (!req) { 2805 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 2806 goto out_unlock_session; 2807 } 2808 2809 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 2810 ret = decode_MOSDOpReply(msg, &m); 2811 m.redirect.oloc.pool_ns = NULL; 2812 if (ret) { 2813 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 2814 req->r_tid, ret); 2815 ceph_msg_dump(msg); 2816 goto fail_request; 2817 } 2818 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 2819 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 2820 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 2821 le64_to_cpu(m.replay_version.version), m.user_version); 2822 2823 if (m.retry_attempt >= 0) { 2824 if (m.retry_attempt != req->r_attempts - 1) { 2825 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 2826 req, req->r_tid, m.retry_attempt, 2827 req->r_attempts - 1); 2828 goto out_unlock_session; 2829 } 2830 } else { 2831 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 2832 } 2833 2834 if (!ceph_oloc_empty(&m.redirect.oloc)) { 2835 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 2836 m.redirect.oloc.pool); 2837 unlink_request(osd, req); 2838 mutex_unlock(&osd->lock); 2839 2840 /* 2841 * Not ceph_oloc_copy() - changing pool_ns is not 2842 * supported. 2843 */ 2844 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 2845 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED; 2846 req->r_tid = 0; 2847 __submit_request(req, false); 2848 goto out_unlock_osdc; 2849 } 2850 2851 if (m.num_ops != req->r_num_ops) { 2852 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 2853 req->r_num_ops, req->r_tid); 2854 goto fail_request; 2855 } 2856 for (i = 0; i < req->r_num_ops; i++) { 2857 dout(" req %p tid %llu op %d rval %d len %u\n", req, 2858 req->r_tid, i, m.rval[i], m.outdata_len[i]); 2859 req->r_ops[i].rval = m.rval[i]; 2860 req->r_ops[i].outdata_len = m.outdata_len[i]; 2861 data_len += m.outdata_len[i]; 2862 } 2863 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 2864 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 2865 le32_to_cpu(msg->hdr.data_len), req->r_tid); 2866 goto fail_request; 2867 } 2868 dout("%s req %p tid %llu result %d data_len %u\n", __func__, 2869 req, req->r_tid, m.result, data_len); 2870 2871 /* 2872 * Since we only ever request ONDISK, we should only ever get 2873 * one (type of) reply back. 2874 */ 2875 WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK)); 2876 req->r_result = m.result ?: data_len; 2877 finish_request(req); 2878 mutex_unlock(&osd->lock); 2879 up_read(&osdc->lock); 2880 2881 __complete_request(req); 2882 complete_all(&req->r_completion); 2883 ceph_osdc_put_request(req); 2884 return; 2885 2886 fail_request: 2887 complete_request(req, -EIO); 2888 out_unlock_session: 2889 mutex_unlock(&osd->lock); 2890 out_unlock_osdc: 2891 up_read(&osdc->lock); 2892 } 2893 2894 static void set_pool_was_full(struct ceph_osd_client *osdc) 2895 { 2896 struct rb_node *n; 2897 2898 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 2899 struct ceph_pg_pool_info *pi = 2900 rb_entry(n, struct ceph_pg_pool_info, node); 2901 2902 pi->was_full = __pool_full(pi); 2903 } 2904 } 2905 2906 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 2907 { 2908 struct ceph_pg_pool_info *pi; 2909 2910 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 2911 if (!pi) 2912 return false; 2913 2914 return pi->was_full && !__pool_full(pi); 2915 } 2916 2917 static enum calc_target_result 2918 recalc_linger_target(struct ceph_osd_linger_request *lreq) 2919 { 2920 struct ceph_osd_client *osdc = lreq->osdc; 2921 enum calc_target_result ct_res; 2922 2923 ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true); 2924 if (ct_res == CALC_TARGET_NEED_RESEND) { 2925 struct ceph_osd *osd; 2926 2927 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2928 if (osd != lreq->osd) { 2929 unlink_linger(lreq->osd, lreq); 2930 link_linger(osd, lreq); 2931 } 2932 } 2933 2934 return ct_res; 2935 } 2936 2937 /* 2938 * Requeue requests whose mapping to an OSD has changed. 2939 */ 2940 static void scan_requests(struct ceph_osd *osd, 2941 bool force_resend, 2942 bool cleared_full, 2943 bool check_pool_cleared_full, 2944 struct rb_root *need_resend, 2945 struct list_head *need_resend_linger) 2946 { 2947 struct ceph_osd_client *osdc = osd->o_osdc; 2948 struct rb_node *n; 2949 bool force_resend_writes; 2950 2951 for (n = rb_first(&osd->o_linger_requests); n; ) { 2952 struct ceph_osd_linger_request *lreq = 2953 rb_entry(n, struct ceph_osd_linger_request, node); 2954 enum calc_target_result ct_res; 2955 2956 n = rb_next(n); /* recalc_linger_target() */ 2957 2958 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 2959 lreq->linger_id); 2960 ct_res = recalc_linger_target(lreq); 2961 switch (ct_res) { 2962 case CALC_TARGET_NO_ACTION: 2963 force_resend_writes = cleared_full || 2964 (check_pool_cleared_full && 2965 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 2966 if (!force_resend && !force_resend_writes) 2967 break; 2968 2969 /* fall through */ 2970 case CALC_TARGET_NEED_RESEND: 2971 cancel_linger_map_check(lreq); 2972 /* 2973 * scan_requests() for the previous epoch(s) 2974 * may have already added it to the list, since 2975 * it's not unlinked here. 2976 */ 2977 if (list_empty(&lreq->scan_item)) 2978 list_add_tail(&lreq->scan_item, need_resend_linger); 2979 break; 2980 case CALC_TARGET_POOL_DNE: 2981 check_linger_pool_dne(lreq); 2982 break; 2983 } 2984 } 2985 2986 for (n = rb_first(&osd->o_requests); n; ) { 2987 struct ceph_osd_request *req = 2988 rb_entry(n, struct ceph_osd_request, r_node); 2989 enum calc_target_result ct_res; 2990 2991 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 2992 2993 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 2994 ct_res = calc_target(osdc, &req->r_t, 2995 &req->r_last_force_resend, false); 2996 switch (ct_res) { 2997 case CALC_TARGET_NO_ACTION: 2998 force_resend_writes = cleared_full || 2999 (check_pool_cleared_full && 3000 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3001 if (!force_resend && 3002 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3003 !force_resend_writes)) 3004 break; 3005 3006 /* fall through */ 3007 case CALC_TARGET_NEED_RESEND: 3008 cancel_map_check(req); 3009 unlink_request(osd, req); 3010 insert_request(need_resend, req); 3011 break; 3012 case CALC_TARGET_POOL_DNE: 3013 check_pool_dne(req); 3014 break; 3015 } 3016 } 3017 } 3018 3019 static int handle_one_map(struct ceph_osd_client *osdc, 3020 void *p, void *end, bool incremental, 3021 struct rb_root *need_resend, 3022 struct list_head *need_resend_linger) 3023 { 3024 struct ceph_osdmap *newmap; 3025 struct rb_node *n; 3026 bool skipped_map = false; 3027 bool was_full; 3028 3029 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3030 set_pool_was_full(osdc); 3031 3032 if (incremental) 3033 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3034 else 3035 newmap = ceph_osdmap_decode(&p, end); 3036 if (IS_ERR(newmap)) 3037 return PTR_ERR(newmap); 3038 3039 if (newmap != osdc->osdmap) { 3040 /* 3041 * Preserve ->was_full before destroying the old map. 3042 * For pools that weren't in the old map, ->was_full 3043 * should be false. 3044 */ 3045 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3046 struct ceph_pg_pool_info *pi = 3047 rb_entry(n, struct ceph_pg_pool_info, node); 3048 struct ceph_pg_pool_info *old_pi; 3049 3050 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3051 if (old_pi) 3052 pi->was_full = old_pi->was_full; 3053 else 3054 WARN_ON(pi->was_full); 3055 } 3056 3057 if (osdc->osdmap->epoch && 3058 osdc->osdmap->epoch + 1 < newmap->epoch) { 3059 WARN_ON(incremental); 3060 skipped_map = true; 3061 } 3062 3063 ceph_osdmap_destroy(osdc->osdmap); 3064 osdc->osdmap = newmap; 3065 } 3066 3067 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3068 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3069 need_resend, need_resend_linger); 3070 3071 for (n = rb_first(&osdc->osds); n; ) { 3072 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3073 3074 n = rb_next(n); /* close_osd() */ 3075 3076 scan_requests(osd, skipped_map, was_full, true, need_resend, 3077 need_resend_linger); 3078 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3079 memcmp(&osd->o_con.peer_addr, 3080 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3081 sizeof(struct ceph_entity_addr))) 3082 close_osd(osd); 3083 } 3084 3085 return 0; 3086 } 3087 3088 static void kick_requests(struct ceph_osd_client *osdc, 3089 struct rb_root *need_resend, 3090 struct list_head *need_resend_linger) 3091 { 3092 struct ceph_osd_linger_request *lreq, *nlreq; 3093 struct rb_node *n; 3094 3095 for (n = rb_first(need_resend); n; ) { 3096 struct ceph_osd_request *req = 3097 rb_entry(n, struct ceph_osd_request, r_node); 3098 struct ceph_osd *osd; 3099 3100 n = rb_next(n); 3101 erase_request(need_resend, req); /* before link_request() */ 3102 3103 WARN_ON(req->r_osd); 3104 calc_target(osdc, &req->r_t, NULL, false); 3105 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3106 link_request(osd, req); 3107 if (!req->r_linger) { 3108 if (!osd_homeless(osd) && !req->r_t.paused) 3109 send_request(req); 3110 } else { 3111 cancel_linger_request(req); 3112 } 3113 } 3114 3115 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3116 if (!osd_homeless(lreq->osd)) 3117 send_linger(lreq); 3118 3119 list_del_init(&lreq->scan_item); 3120 } 3121 } 3122 3123 /* 3124 * Process updated osd map. 3125 * 3126 * The message contains any number of incremental and full maps, normally 3127 * indicating some sort of topology change in the cluster. Kick requests 3128 * off to different OSDs as needed. 3129 */ 3130 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3131 { 3132 void *p = msg->front.iov_base; 3133 void *const end = p + msg->front.iov_len; 3134 u32 nr_maps, maplen; 3135 u32 epoch; 3136 struct ceph_fsid fsid; 3137 struct rb_root need_resend = RB_ROOT; 3138 LIST_HEAD(need_resend_linger); 3139 bool handled_incremental = false; 3140 bool was_pauserd, was_pausewr; 3141 bool pauserd, pausewr; 3142 int err; 3143 3144 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3145 down_write(&osdc->lock); 3146 3147 /* verify fsid */ 3148 ceph_decode_need(&p, end, sizeof(fsid), bad); 3149 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3150 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3151 goto bad; 3152 3153 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3154 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3155 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3156 have_pool_full(osdc); 3157 3158 /* incremental maps */ 3159 ceph_decode_32_safe(&p, end, nr_maps, bad); 3160 dout(" %d inc maps\n", nr_maps); 3161 while (nr_maps > 0) { 3162 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3163 epoch = ceph_decode_32(&p); 3164 maplen = ceph_decode_32(&p); 3165 ceph_decode_need(&p, end, maplen, bad); 3166 if (osdc->osdmap->epoch && 3167 osdc->osdmap->epoch + 1 == epoch) { 3168 dout("applying incremental map %u len %d\n", 3169 epoch, maplen); 3170 err = handle_one_map(osdc, p, p + maplen, true, 3171 &need_resend, &need_resend_linger); 3172 if (err) 3173 goto bad; 3174 handled_incremental = true; 3175 } else { 3176 dout("ignoring incremental map %u len %d\n", 3177 epoch, maplen); 3178 } 3179 p += maplen; 3180 nr_maps--; 3181 } 3182 if (handled_incremental) 3183 goto done; 3184 3185 /* full maps */ 3186 ceph_decode_32_safe(&p, end, nr_maps, bad); 3187 dout(" %d full maps\n", nr_maps); 3188 while (nr_maps) { 3189 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3190 epoch = ceph_decode_32(&p); 3191 maplen = ceph_decode_32(&p); 3192 ceph_decode_need(&p, end, maplen, bad); 3193 if (nr_maps > 1) { 3194 dout("skipping non-latest full map %u len %d\n", 3195 epoch, maplen); 3196 } else if (osdc->osdmap->epoch >= epoch) { 3197 dout("skipping full map %u len %d, " 3198 "older than our %u\n", epoch, maplen, 3199 osdc->osdmap->epoch); 3200 } else { 3201 dout("taking full map %u len %d\n", epoch, maplen); 3202 err = handle_one_map(osdc, p, p + maplen, false, 3203 &need_resend, &need_resend_linger); 3204 if (err) 3205 goto bad; 3206 } 3207 p += maplen; 3208 nr_maps--; 3209 } 3210 3211 done: 3212 /* 3213 * subscribe to subsequent osdmap updates if full to ensure 3214 * we find out when we are no longer full and stop returning 3215 * ENOSPC. 3216 */ 3217 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3218 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3219 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3220 have_pool_full(osdc); 3221 if (was_pauserd || was_pausewr || pauserd || pausewr) 3222 maybe_request_map(osdc); 3223 3224 kick_requests(osdc, &need_resend, &need_resend_linger); 3225 3226 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 3227 osdc->osdmap->epoch); 3228 up_write(&osdc->lock); 3229 wake_up_all(&osdc->client->auth_wq); 3230 return; 3231 3232 bad: 3233 pr_err("osdc handle_map corrupt msg\n"); 3234 ceph_msg_dump(msg); 3235 up_write(&osdc->lock); 3236 } 3237 3238 /* 3239 * Resubmit requests pending on the given osd. 3240 */ 3241 static void kick_osd_requests(struct ceph_osd *osd) 3242 { 3243 struct rb_node *n; 3244 3245 for (n = rb_first(&osd->o_requests); n; ) { 3246 struct ceph_osd_request *req = 3247 rb_entry(n, struct ceph_osd_request, r_node); 3248 3249 n = rb_next(n); /* cancel_linger_request() */ 3250 3251 if (!req->r_linger) { 3252 if (!req->r_t.paused) 3253 send_request(req); 3254 } else { 3255 cancel_linger_request(req); 3256 } 3257 } 3258 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 3259 struct ceph_osd_linger_request *lreq = 3260 rb_entry(n, struct ceph_osd_linger_request, node); 3261 3262 send_linger(lreq); 3263 } 3264 } 3265 3266 /* 3267 * If the osd connection drops, we need to resubmit all requests. 3268 */ 3269 static void osd_fault(struct ceph_connection *con) 3270 { 3271 struct ceph_osd *osd = con->private; 3272 struct ceph_osd_client *osdc = osd->o_osdc; 3273 3274 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 3275 3276 down_write(&osdc->lock); 3277 if (!osd_registered(osd)) { 3278 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3279 goto out_unlock; 3280 } 3281 3282 if (!reopen_osd(osd)) 3283 kick_osd_requests(osd); 3284 maybe_request_map(osdc); 3285 3286 out_unlock: 3287 up_write(&osdc->lock); 3288 } 3289 3290 /* 3291 * Process osd watch notifications 3292 */ 3293 static void handle_watch_notify(struct ceph_osd_client *osdc, 3294 struct ceph_msg *msg) 3295 { 3296 void *p = msg->front.iov_base; 3297 void *const end = p + msg->front.iov_len; 3298 struct ceph_osd_linger_request *lreq; 3299 struct linger_work *lwork; 3300 u8 proto_ver, opcode; 3301 u64 cookie, notify_id; 3302 u64 notifier_id = 0; 3303 s32 return_code = 0; 3304 void *payload = NULL; 3305 u32 payload_len = 0; 3306 3307 ceph_decode_8_safe(&p, end, proto_ver, bad); 3308 ceph_decode_8_safe(&p, end, opcode, bad); 3309 ceph_decode_64_safe(&p, end, cookie, bad); 3310 p += 8; /* skip ver */ 3311 ceph_decode_64_safe(&p, end, notify_id, bad); 3312 3313 if (proto_ver >= 1) { 3314 ceph_decode_32_safe(&p, end, payload_len, bad); 3315 ceph_decode_need(&p, end, payload_len, bad); 3316 payload = p; 3317 p += payload_len; 3318 } 3319 3320 if (le16_to_cpu(msg->hdr.version) >= 2) 3321 ceph_decode_32_safe(&p, end, return_code, bad); 3322 3323 if (le16_to_cpu(msg->hdr.version) >= 3) 3324 ceph_decode_64_safe(&p, end, notifier_id, bad); 3325 3326 down_read(&osdc->lock); 3327 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 3328 if (!lreq) { 3329 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 3330 cookie); 3331 goto out_unlock_osdc; 3332 } 3333 3334 mutex_lock(&lreq->lock); 3335 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 3336 opcode, cookie, lreq, lreq->is_watch); 3337 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 3338 if (!lreq->last_error) { 3339 lreq->last_error = -ENOTCONN; 3340 queue_watch_error(lreq); 3341 } 3342 } else if (!lreq->is_watch) { 3343 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 3344 if (lreq->notify_id && lreq->notify_id != notify_id) { 3345 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 3346 lreq->notify_id, notify_id); 3347 } else if (!completion_done(&lreq->notify_finish_wait)) { 3348 struct ceph_msg_data *data = 3349 list_first_entry_or_null(&msg->data, 3350 struct ceph_msg_data, 3351 links); 3352 3353 if (data) { 3354 if (lreq->preply_pages) { 3355 WARN_ON(data->type != 3356 CEPH_MSG_DATA_PAGES); 3357 *lreq->preply_pages = data->pages; 3358 *lreq->preply_len = data->length; 3359 } else { 3360 ceph_release_page_vector(data->pages, 3361 calc_pages_for(0, data->length)); 3362 } 3363 } 3364 lreq->notify_finish_error = return_code; 3365 complete_all(&lreq->notify_finish_wait); 3366 } 3367 } else { 3368 /* CEPH_WATCH_EVENT_NOTIFY */ 3369 lwork = lwork_alloc(lreq, do_watch_notify); 3370 if (!lwork) { 3371 pr_err("failed to allocate notify-lwork\n"); 3372 goto out_unlock_lreq; 3373 } 3374 3375 lwork->notify.notify_id = notify_id; 3376 lwork->notify.notifier_id = notifier_id; 3377 lwork->notify.payload = payload; 3378 lwork->notify.payload_len = payload_len; 3379 lwork->notify.msg = ceph_msg_get(msg); 3380 lwork_queue(lwork); 3381 } 3382 3383 out_unlock_lreq: 3384 mutex_unlock(&lreq->lock); 3385 out_unlock_osdc: 3386 up_read(&osdc->lock); 3387 return; 3388 3389 bad: 3390 pr_err("osdc handle_watch_notify corrupt msg\n"); 3391 } 3392 3393 /* 3394 * Register request, send initial attempt. 3395 */ 3396 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 3397 struct ceph_osd_request *req, 3398 bool nofail) 3399 { 3400 down_read(&osdc->lock); 3401 submit_request(req, false); 3402 up_read(&osdc->lock); 3403 3404 return 0; 3405 } 3406 EXPORT_SYMBOL(ceph_osdc_start_request); 3407 3408 /* 3409 * Unregister a registered request. The request is not completed: 3410 * ->r_result isn't set and __complete_request() isn't called. 3411 */ 3412 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 3413 { 3414 struct ceph_osd_client *osdc = req->r_osdc; 3415 3416 down_write(&osdc->lock); 3417 if (req->r_osd) 3418 cancel_request(req); 3419 up_write(&osdc->lock); 3420 } 3421 EXPORT_SYMBOL(ceph_osdc_cancel_request); 3422 3423 /* 3424 * @timeout: in jiffies, 0 means "wait forever" 3425 */ 3426 static int wait_request_timeout(struct ceph_osd_request *req, 3427 unsigned long timeout) 3428 { 3429 long left; 3430 3431 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3432 left = wait_for_completion_killable_timeout(&req->r_completion, 3433 ceph_timeout_jiffies(timeout)); 3434 if (left <= 0) { 3435 left = left ?: -ETIMEDOUT; 3436 ceph_osdc_cancel_request(req); 3437 } else { 3438 left = req->r_result; /* completed */ 3439 } 3440 3441 return left; 3442 } 3443 3444 /* 3445 * wait for a request to complete 3446 */ 3447 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 3448 struct ceph_osd_request *req) 3449 { 3450 return wait_request_timeout(req, 0); 3451 } 3452 EXPORT_SYMBOL(ceph_osdc_wait_request); 3453 3454 /* 3455 * sync - wait for all in-flight requests to flush. avoid starvation. 3456 */ 3457 void ceph_osdc_sync(struct ceph_osd_client *osdc) 3458 { 3459 struct rb_node *n, *p; 3460 u64 last_tid = atomic64_read(&osdc->last_tid); 3461 3462 again: 3463 down_read(&osdc->lock); 3464 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3465 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3466 3467 mutex_lock(&osd->lock); 3468 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 3469 struct ceph_osd_request *req = 3470 rb_entry(p, struct ceph_osd_request, r_node); 3471 3472 if (req->r_tid > last_tid) 3473 break; 3474 3475 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 3476 continue; 3477 3478 ceph_osdc_get_request(req); 3479 mutex_unlock(&osd->lock); 3480 up_read(&osdc->lock); 3481 dout("%s waiting on req %p tid %llu last_tid %llu\n", 3482 __func__, req, req->r_tid, last_tid); 3483 wait_for_completion(&req->r_completion); 3484 ceph_osdc_put_request(req); 3485 goto again; 3486 } 3487 3488 mutex_unlock(&osd->lock); 3489 } 3490 3491 up_read(&osdc->lock); 3492 dout("%s done last_tid %llu\n", __func__, last_tid); 3493 } 3494 EXPORT_SYMBOL(ceph_osdc_sync); 3495 3496 static struct ceph_osd_request * 3497 alloc_linger_request(struct ceph_osd_linger_request *lreq) 3498 { 3499 struct ceph_osd_request *req; 3500 3501 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 3502 if (!req) 3503 return NULL; 3504 3505 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3506 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3507 3508 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 3509 ceph_osdc_put_request(req); 3510 return NULL; 3511 } 3512 3513 return req; 3514 } 3515 3516 /* 3517 * Returns a handle, caller owns a ref. 3518 */ 3519 struct ceph_osd_linger_request * 3520 ceph_osdc_watch(struct ceph_osd_client *osdc, 3521 struct ceph_object_id *oid, 3522 struct ceph_object_locator *oloc, 3523 rados_watchcb2_t wcb, 3524 rados_watcherrcb_t errcb, 3525 void *data) 3526 { 3527 struct ceph_osd_linger_request *lreq; 3528 int ret; 3529 3530 lreq = linger_alloc(osdc); 3531 if (!lreq) 3532 return ERR_PTR(-ENOMEM); 3533 3534 lreq->is_watch = true; 3535 lreq->wcb = wcb; 3536 lreq->errcb = errcb; 3537 lreq->data = data; 3538 lreq->watch_valid_thru = jiffies; 3539 3540 ceph_oid_copy(&lreq->t.base_oid, oid); 3541 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3542 lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3543 lreq->mtime = CURRENT_TIME; 3544 3545 lreq->reg_req = alloc_linger_request(lreq); 3546 if (!lreq->reg_req) { 3547 ret = -ENOMEM; 3548 goto err_put_lreq; 3549 } 3550 3551 lreq->ping_req = alloc_linger_request(lreq); 3552 if (!lreq->ping_req) { 3553 ret = -ENOMEM; 3554 goto err_put_lreq; 3555 } 3556 3557 down_write(&osdc->lock); 3558 linger_register(lreq); /* before osd_req_op_* */ 3559 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id, 3560 CEPH_OSD_WATCH_OP_WATCH); 3561 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id, 3562 CEPH_OSD_WATCH_OP_PING); 3563 linger_submit(lreq); 3564 up_write(&osdc->lock); 3565 3566 ret = linger_reg_commit_wait(lreq); 3567 if (ret) { 3568 linger_cancel(lreq); 3569 goto err_put_lreq; 3570 } 3571 3572 return lreq; 3573 3574 err_put_lreq: 3575 linger_put(lreq); 3576 return ERR_PTR(ret); 3577 } 3578 EXPORT_SYMBOL(ceph_osdc_watch); 3579 3580 /* 3581 * Releases a ref. 3582 * 3583 * Times out after mount_timeout to preserve rbd unmap behaviour 3584 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 3585 * with mount_timeout"). 3586 */ 3587 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 3588 struct ceph_osd_linger_request *lreq) 3589 { 3590 struct ceph_options *opts = osdc->client->options; 3591 struct ceph_osd_request *req; 3592 int ret; 3593 3594 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3595 if (!req) 3596 return -ENOMEM; 3597 3598 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3599 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3600 req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3601 req->r_mtime = CURRENT_TIME; 3602 osd_req_op_watch_init(req, 0, lreq->linger_id, 3603 CEPH_OSD_WATCH_OP_UNWATCH); 3604 3605 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3606 if (ret) 3607 goto out_put_req; 3608 3609 ceph_osdc_start_request(osdc, req, false); 3610 linger_cancel(lreq); 3611 linger_put(lreq); 3612 ret = wait_request_timeout(req, opts->mount_timeout); 3613 3614 out_put_req: 3615 ceph_osdc_put_request(req); 3616 return ret; 3617 } 3618 EXPORT_SYMBOL(ceph_osdc_unwatch); 3619 3620 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 3621 u64 notify_id, u64 cookie, void *payload, 3622 size_t payload_len) 3623 { 3624 struct ceph_osd_req_op *op; 3625 struct ceph_pagelist *pl; 3626 int ret; 3627 3628 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 3629 3630 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3631 if (!pl) 3632 return -ENOMEM; 3633 3634 ceph_pagelist_init(pl); 3635 ret = ceph_pagelist_encode_64(pl, notify_id); 3636 ret |= ceph_pagelist_encode_64(pl, cookie); 3637 if (payload) { 3638 ret |= ceph_pagelist_encode_32(pl, payload_len); 3639 ret |= ceph_pagelist_append(pl, payload, payload_len); 3640 } else { 3641 ret |= ceph_pagelist_encode_32(pl, 0); 3642 } 3643 if (ret) { 3644 ceph_pagelist_release(pl); 3645 return -ENOMEM; 3646 } 3647 3648 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 3649 op->indata_len = pl->length; 3650 return 0; 3651 } 3652 3653 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 3654 struct ceph_object_id *oid, 3655 struct ceph_object_locator *oloc, 3656 u64 notify_id, 3657 u64 cookie, 3658 void *payload, 3659 size_t payload_len) 3660 { 3661 struct ceph_osd_request *req; 3662 int ret; 3663 3664 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3665 if (!req) 3666 return -ENOMEM; 3667 3668 ceph_oid_copy(&req->r_base_oid, oid); 3669 ceph_oloc_copy(&req->r_base_oloc, oloc); 3670 req->r_flags = CEPH_OSD_FLAG_READ; 3671 3672 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3673 if (ret) 3674 goto out_put_req; 3675 3676 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 3677 payload_len); 3678 if (ret) 3679 goto out_put_req; 3680 3681 ceph_osdc_start_request(osdc, req, false); 3682 ret = ceph_osdc_wait_request(osdc, req); 3683 3684 out_put_req: 3685 ceph_osdc_put_request(req); 3686 return ret; 3687 } 3688 EXPORT_SYMBOL(ceph_osdc_notify_ack); 3689 3690 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 3691 u64 cookie, u32 prot_ver, u32 timeout, 3692 void *payload, size_t payload_len) 3693 { 3694 struct ceph_osd_req_op *op; 3695 struct ceph_pagelist *pl; 3696 int ret; 3697 3698 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 3699 op->notify.cookie = cookie; 3700 3701 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3702 if (!pl) 3703 return -ENOMEM; 3704 3705 ceph_pagelist_init(pl); 3706 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 3707 ret |= ceph_pagelist_encode_32(pl, timeout); 3708 ret |= ceph_pagelist_encode_32(pl, payload_len); 3709 ret |= ceph_pagelist_append(pl, payload, payload_len); 3710 if (ret) { 3711 ceph_pagelist_release(pl); 3712 return -ENOMEM; 3713 } 3714 3715 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 3716 op->indata_len = pl->length; 3717 return 0; 3718 } 3719 3720 /* 3721 * @timeout: in seconds 3722 * 3723 * @preply_{pages,len} are initialized both on success and error. 3724 * The caller is responsible for: 3725 * 3726 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 3727 */ 3728 int ceph_osdc_notify(struct ceph_osd_client *osdc, 3729 struct ceph_object_id *oid, 3730 struct ceph_object_locator *oloc, 3731 void *payload, 3732 size_t payload_len, 3733 u32 timeout, 3734 struct page ***preply_pages, 3735 size_t *preply_len) 3736 { 3737 struct ceph_osd_linger_request *lreq; 3738 struct page **pages; 3739 int ret; 3740 3741 WARN_ON(!timeout); 3742 if (preply_pages) { 3743 *preply_pages = NULL; 3744 *preply_len = 0; 3745 } 3746 3747 lreq = linger_alloc(osdc); 3748 if (!lreq) 3749 return -ENOMEM; 3750 3751 lreq->preply_pages = preply_pages; 3752 lreq->preply_len = preply_len; 3753 3754 ceph_oid_copy(&lreq->t.base_oid, oid); 3755 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3756 lreq->t.flags = CEPH_OSD_FLAG_READ; 3757 3758 lreq->reg_req = alloc_linger_request(lreq); 3759 if (!lreq->reg_req) { 3760 ret = -ENOMEM; 3761 goto out_put_lreq; 3762 } 3763 3764 /* for notify_id */ 3765 pages = ceph_alloc_page_vector(1, GFP_NOIO); 3766 if (IS_ERR(pages)) { 3767 ret = PTR_ERR(pages); 3768 goto out_put_lreq; 3769 } 3770 3771 down_write(&osdc->lock); 3772 linger_register(lreq); /* before osd_req_op_* */ 3773 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1, 3774 timeout, payload, payload_len); 3775 if (ret) { 3776 linger_unregister(lreq); 3777 up_write(&osdc->lock); 3778 ceph_release_page_vector(pages, 1); 3779 goto out_put_lreq; 3780 } 3781 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 3782 response_data), 3783 pages, PAGE_SIZE, 0, false, true); 3784 linger_submit(lreq); 3785 up_write(&osdc->lock); 3786 3787 ret = linger_reg_commit_wait(lreq); 3788 if (!ret) 3789 ret = linger_notify_finish_wait(lreq); 3790 else 3791 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 3792 3793 linger_cancel(lreq); 3794 out_put_lreq: 3795 linger_put(lreq); 3796 return ret; 3797 } 3798 EXPORT_SYMBOL(ceph_osdc_notify); 3799 3800 /* 3801 * Return the number of milliseconds since the watch was last 3802 * confirmed, or an error. If there is an error, the watch is no 3803 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 3804 */ 3805 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 3806 struct ceph_osd_linger_request *lreq) 3807 { 3808 unsigned long stamp, age; 3809 int ret; 3810 3811 down_read(&osdc->lock); 3812 mutex_lock(&lreq->lock); 3813 stamp = lreq->watch_valid_thru; 3814 if (!list_empty(&lreq->pending_lworks)) { 3815 struct linger_work *lwork = 3816 list_first_entry(&lreq->pending_lworks, 3817 struct linger_work, 3818 pending_item); 3819 3820 if (time_before(lwork->queued_stamp, stamp)) 3821 stamp = lwork->queued_stamp; 3822 } 3823 age = jiffies - stamp; 3824 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 3825 lreq, lreq->linger_id, age, lreq->last_error); 3826 /* we are truncating to msecs, so return a safe upper bound */ 3827 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 3828 3829 mutex_unlock(&lreq->lock); 3830 up_read(&osdc->lock); 3831 return ret; 3832 } 3833 3834 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 3835 { 3836 u8 struct_v; 3837 u32 struct_len; 3838 int ret; 3839 3840 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 3841 &struct_v, &struct_len); 3842 if (ret) 3843 return ret; 3844 3845 ceph_decode_copy(p, &item->name, sizeof(item->name)); 3846 item->cookie = ceph_decode_64(p); 3847 *p += 4; /* skip timeout_seconds */ 3848 if (struct_v >= 2) { 3849 ceph_decode_copy(p, &item->addr, sizeof(item->addr)); 3850 ceph_decode_addr(&item->addr); 3851 } 3852 3853 dout("%s %s%llu cookie %llu addr %s\n", __func__, 3854 ENTITY_NAME(item->name), item->cookie, 3855 ceph_pr_addr(&item->addr.in_addr)); 3856 return 0; 3857 } 3858 3859 static int decode_watchers(void **p, void *end, 3860 struct ceph_watch_item **watchers, 3861 u32 *num_watchers) 3862 { 3863 u8 struct_v; 3864 u32 struct_len; 3865 int i; 3866 int ret; 3867 3868 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 3869 &struct_v, &struct_len); 3870 if (ret) 3871 return ret; 3872 3873 *num_watchers = ceph_decode_32(p); 3874 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 3875 if (!*watchers) 3876 return -ENOMEM; 3877 3878 for (i = 0; i < *num_watchers; i++) { 3879 ret = decode_watcher(p, end, *watchers + i); 3880 if (ret) { 3881 kfree(*watchers); 3882 return ret; 3883 } 3884 } 3885 3886 return 0; 3887 } 3888 3889 /* 3890 * On success, the caller is responsible for: 3891 * 3892 * kfree(watchers); 3893 */ 3894 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 3895 struct ceph_object_id *oid, 3896 struct ceph_object_locator *oloc, 3897 struct ceph_watch_item **watchers, 3898 u32 *num_watchers) 3899 { 3900 struct ceph_osd_request *req; 3901 struct page **pages; 3902 int ret; 3903 3904 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3905 if (!req) 3906 return -ENOMEM; 3907 3908 ceph_oid_copy(&req->r_base_oid, oid); 3909 ceph_oloc_copy(&req->r_base_oloc, oloc); 3910 req->r_flags = CEPH_OSD_FLAG_READ; 3911 3912 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3913 if (ret) 3914 goto out_put_req; 3915 3916 pages = ceph_alloc_page_vector(1, GFP_NOIO); 3917 if (IS_ERR(pages)) { 3918 ret = PTR_ERR(pages); 3919 goto out_put_req; 3920 } 3921 3922 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 3923 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 3924 response_data), 3925 pages, PAGE_SIZE, 0, false, true); 3926 3927 ceph_osdc_start_request(osdc, req, false); 3928 ret = ceph_osdc_wait_request(osdc, req); 3929 if (ret >= 0) { 3930 void *p = page_address(pages[0]); 3931 void *const end = p + req->r_ops[0].outdata_len; 3932 3933 ret = decode_watchers(&p, end, watchers, num_watchers); 3934 } 3935 3936 out_put_req: 3937 ceph_osdc_put_request(req); 3938 return ret; 3939 } 3940 EXPORT_SYMBOL(ceph_osdc_list_watchers); 3941 3942 /* 3943 * Call all pending notify callbacks - for use after a watch is 3944 * unregistered, to make sure no more callbacks for it will be invoked 3945 */ 3946 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 3947 { 3948 dout("%s osdc %p\n", __func__, osdc); 3949 flush_workqueue(osdc->notify_wq); 3950 } 3951 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 3952 3953 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 3954 { 3955 down_read(&osdc->lock); 3956 maybe_request_map(osdc); 3957 up_read(&osdc->lock); 3958 } 3959 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 3960 3961 /* 3962 * Execute an OSD class method on an object. 3963 * 3964 * @flags: CEPH_OSD_FLAG_* 3965 * @resp_len: in/out param for reply length 3966 */ 3967 int ceph_osdc_call(struct ceph_osd_client *osdc, 3968 struct ceph_object_id *oid, 3969 struct ceph_object_locator *oloc, 3970 const char *class, const char *method, 3971 unsigned int flags, 3972 struct page *req_page, size_t req_len, 3973 struct page *resp_page, size_t *resp_len) 3974 { 3975 struct ceph_osd_request *req; 3976 int ret; 3977 3978 if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE)) 3979 return -E2BIG; 3980 3981 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3982 if (!req) 3983 return -ENOMEM; 3984 3985 ceph_oid_copy(&req->r_base_oid, oid); 3986 ceph_oloc_copy(&req->r_base_oloc, oloc); 3987 req->r_flags = flags; 3988 3989 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3990 if (ret) 3991 goto out_put_req; 3992 3993 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method); 3994 if (req_page) 3995 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 3996 0, false, false); 3997 if (resp_page) 3998 osd_req_op_cls_response_data_pages(req, 0, &resp_page, 3999 *resp_len, 0, false, false); 4000 4001 ceph_osdc_start_request(osdc, req, false); 4002 ret = ceph_osdc_wait_request(osdc, req); 4003 if (ret >= 0) { 4004 ret = req->r_ops[0].rval; 4005 if (resp_page) 4006 *resp_len = req->r_ops[0].outdata_len; 4007 } 4008 4009 out_put_req: 4010 ceph_osdc_put_request(req); 4011 return ret; 4012 } 4013 EXPORT_SYMBOL(ceph_osdc_call); 4014 4015 /* 4016 * init, shutdown 4017 */ 4018 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 4019 { 4020 int err; 4021 4022 dout("init\n"); 4023 osdc->client = client; 4024 init_rwsem(&osdc->lock); 4025 osdc->osds = RB_ROOT; 4026 INIT_LIST_HEAD(&osdc->osd_lru); 4027 spin_lock_init(&osdc->osd_lru_lock); 4028 osd_init(&osdc->homeless_osd); 4029 osdc->homeless_osd.o_osdc = osdc; 4030 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 4031 osdc->last_linger_id = CEPH_LINGER_ID_START; 4032 osdc->linger_requests = RB_ROOT; 4033 osdc->map_checks = RB_ROOT; 4034 osdc->linger_map_checks = RB_ROOT; 4035 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 4036 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 4037 4038 err = -ENOMEM; 4039 osdc->osdmap = ceph_osdmap_alloc(); 4040 if (!osdc->osdmap) 4041 goto out; 4042 4043 osdc->req_mempool = mempool_create_slab_pool(10, 4044 ceph_osd_request_cache); 4045 if (!osdc->req_mempool) 4046 goto out_map; 4047 4048 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 4049 PAGE_SIZE, 10, true, "osd_op"); 4050 if (err < 0) 4051 goto out_mempool; 4052 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 4053 PAGE_SIZE, 10, true, "osd_op_reply"); 4054 if (err < 0) 4055 goto out_msgpool; 4056 4057 err = -ENOMEM; 4058 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 4059 if (!osdc->notify_wq) 4060 goto out_msgpool_reply; 4061 4062 schedule_delayed_work(&osdc->timeout_work, 4063 osdc->client->options->osd_keepalive_timeout); 4064 schedule_delayed_work(&osdc->osds_timeout_work, 4065 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 4066 4067 return 0; 4068 4069 out_msgpool_reply: 4070 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4071 out_msgpool: 4072 ceph_msgpool_destroy(&osdc->msgpool_op); 4073 out_mempool: 4074 mempool_destroy(osdc->req_mempool); 4075 out_map: 4076 ceph_osdmap_destroy(osdc->osdmap); 4077 out: 4078 return err; 4079 } 4080 4081 void ceph_osdc_stop(struct ceph_osd_client *osdc) 4082 { 4083 flush_workqueue(osdc->notify_wq); 4084 destroy_workqueue(osdc->notify_wq); 4085 cancel_delayed_work_sync(&osdc->timeout_work); 4086 cancel_delayed_work_sync(&osdc->osds_timeout_work); 4087 4088 down_write(&osdc->lock); 4089 while (!RB_EMPTY_ROOT(&osdc->osds)) { 4090 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 4091 struct ceph_osd, o_node); 4092 close_osd(osd); 4093 } 4094 up_write(&osdc->lock); 4095 WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1); 4096 osd_cleanup(&osdc->homeless_osd); 4097 4098 WARN_ON(!list_empty(&osdc->osd_lru)); 4099 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 4100 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 4101 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 4102 WARN_ON(atomic_read(&osdc->num_requests)); 4103 WARN_ON(atomic_read(&osdc->num_homeless)); 4104 4105 ceph_osdmap_destroy(osdc->osdmap); 4106 mempool_destroy(osdc->req_mempool); 4107 ceph_msgpool_destroy(&osdc->msgpool_op); 4108 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4109 } 4110 4111 /* 4112 * Read some contiguous pages. If we cross a stripe boundary, shorten 4113 * *plen. Return number of bytes read, or error. 4114 */ 4115 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 4116 struct ceph_vino vino, struct ceph_file_layout *layout, 4117 u64 off, u64 *plen, 4118 u32 truncate_seq, u64 truncate_size, 4119 struct page **pages, int num_pages, int page_align) 4120 { 4121 struct ceph_osd_request *req; 4122 int rc = 0; 4123 4124 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 4125 vino.snap, off, *plen); 4126 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 4127 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 4128 NULL, truncate_seq, truncate_size, 4129 false); 4130 if (IS_ERR(req)) 4131 return PTR_ERR(req); 4132 4133 /* it may be a short read due to an object boundary */ 4134 osd_req_op_extent_osd_data_pages(req, 0, 4135 pages, *plen, page_align, false, false); 4136 4137 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 4138 off, *plen, *plen, page_align); 4139 4140 rc = ceph_osdc_start_request(osdc, req, false); 4141 if (!rc) 4142 rc = ceph_osdc_wait_request(osdc, req); 4143 4144 ceph_osdc_put_request(req); 4145 dout("readpages result %d\n", rc); 4146 return rc; 4147 } 4148 EXPORT_SYMBOL(ceph_osdc_readpages); 4149 4150 /* 4151 * do a synchronous write on N pages 4152 */ 4153 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 4154 struct ceph_file_layout *layout, 4155 struct ceph_snap_context *snapc, 4156 u64 off, u64 len, 4157 u32 truncate_seq, u64 truncate_size, 4158 struct timespec *mtime, 4159 struct page **pages, int num_pages) 4160 { 4161 struct ceph_osd_request *req; 4162 int rc = 0; 4163 int page_align = off & ~PAGE_MASK; 4164 4165 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 4166 CEPH_OSD_OP_WRITE, 4167 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 4168 snapc, truncate_seq, truncate_size, 4169 true); 4170 if (IS_ERR(req)) 4171 return PTR_ERR(req); 4172 4173 /* it may be a short write due to an object boundary */ 4174 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 4175 false, false); 4176 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 4177 4178 req->r_mtime = *mtime; 4179 rc = ceph_osdc_start_request(osdc, req, true); 4180 if (!rc) 4181 rc = ceph_osdc_wait_request(osdc, req); 4182 4183 ceph_osdc_put_request(req); 4184 if (rc == 0) 4185 rc = len; 4186 dout("writepages result %d\n", rc); 4187 return rc; 4188 } 4189 EXPORT_SYMBOL(ceph_osdc_writepages); 4190 4191 int ceph_osdc_setup(void) 4192 { 4193 size_t size = sizeof(struct ceph_osd_request) + 4194 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 4195 4196 BUG_ON(ceph_osd_request_cache); 4197 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 4198 0, 0, NULL); 4199 4200 return ceph_osd_request_cache ? 0 : -ENOMEM; 4201 } 4202 EXPORT_SYMBOL(ceph_osdc_setup); 4203 4204 void ceph_osdc_cleanup(void) 4205 { 4206 BUG_ON(!ceph_osd_request_cache); 4207 kmem_cache_destroy(ceph_osd_request_cache); 4208 ceph_osd_request_cache = NULL; 4209 } 4210 EXPORT_SYMBOL(ceph_osdc_cleanup); 4211 4212 /* 4213 * handle incoming message 4214 */ 4215 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 4216 { 4217 struct ceph_osd *osd = con->private; 4218 struct ceph_osd_client *osdc = osd->o_osdc; 4219 int type = le16_to_cpu(msg->hdr.type); 4220 4221 switch (type) { 4222 case CEPH_MSG_OSD_MAP: 4223 ceph_osdc_handle_map(osdc, msg); 4224 break; 4225 case CEPH_MSG_OSD_OPREPLY: 4226 handle_reply(osd, msg); 4227 break; 4228 case CEPH_MSG_WATCH_NOTIFY: 4229 handle_watch_notify(osdc, msg); 4230 break; 4231 4232 default: 4233 pr_err("received unknown message type %d %s\n", type, 4234 ceph_msg_type_name(type)); 4235 } 4236 4237 ceph_msg_put(msg); 4238 } 4239 4240 /* 4241 * Lookup and return message for incoming reply. Don't try to do 4242 * anything about a larger than preallocated data portion of the 4243 * message at the moment - for now, just skip the message. 4244 */ 4245 static struct ceph_msg *get_reply(struct ceph_connection *con, 4246 struct ceph_msg_header *hdr, 4247 int *skip) 4248 { 4249 struct ceph_osd *osd = con->private; 4250 struct ceph_osd_client *osdc = osd->o_osdc; 4251 struct ceph_msg *m = NULL; 4252 struct ceph_osd_request *req; 4253 int front_len = le32_to_cpu(hdr->front_len); 4254 int data_len = le32_to_cpu(hdr->data_len); 4255 u64 tid = le64_to_cpu(hdr->tid); 4256 4257 down_read(&osdc->lock); 4258 if (!osd_registered(osd)) { 4259 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 4260 *skip = 1; 4261 goto out_unlock_osdc; 4262 } 4263 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 4264 4265 mutex_lock(&osd->lock); 4266 req = lookup_request(&osd->o_requests, tid); 4267 if (!req) { 4268 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 4269 osd->o_osd, tid); 4270 *skip = 1; 4271 goto out_unlock_session; 4272 } 4273 4274 ceph_msg_revoke_incoming(req->r_reply); 4275 4276 if (front_len > req->r_reply->front_alloc_len) { 4277 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 4278 __func__, osd->o_osd, req->r_tid, front_len, 4279 req->r_reply->front_alloc_len); 4280 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 4281 false); 4282 if (!m) 4283 goto out_unlock_session; 4284 ceph_msg_put(req->r_reply); 4285 req->r_reply = m; 4286 } 4287 4288 if (data_len > req->r_reply->data_length) { 4289 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 4290 __func__, osd->o_osd, req->r_tid, data_len, 4291 req->r_reply->data_length); 4292 m = NULL; 4293 *skip = 1; 4294 goto out_unlock_session; 4295 } 4296 4297 m = ceph_msg_get(req->r_reply); 4298 dout("get_reply tid %lld %p\n", tid, m); 4299 4300 out_unlock_session: 4301 mutex_unlock(&osd->lock); 4302 out_unlock_osdc: 4303 up_read(&osdc->lock); 4304 return m; 4305 } 4306 4307 /* 4308 * TODO: switch to a msg-owned pagelist 4309 */ 4310 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 4311 { 4312 struct ceph_msg *m; 4313 int type = le16_to_cpu(hdr->type); 4314 u32 front_len = le32_to_cpu(hdr->front_len); 4315 u32 data_len = le32_to_cpu(hdr->data_len); 4316 4317 m = ceph_msg_new(type, front_len, GFP_NOIO, false); 4318 if (!m) 4319 return NULL; 4320 4321 if (data_len) { 4322 struct page **pages; 4323 struct ceph_osd_data osd_data; 4324 4325 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 4326 GFP_NOIO); 4327 if (IS_ERR(pages)) { 4328 ceph_msg_put(m); 4329 return NULL; 4330 } 4331 4332 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false, 4333 false); 4334 ceph_osdc_msg_data_add(m, &osd_data); 4335 } 4336 4337 return m; 4338 } 4339 4340 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 4341 struct ceph_msg_header *hdr, 4342 int *skip) 4343 { 4344 struct ceph_osd *osd = con->private; 4345 int type = le16_to_cpu(hdr->type); 4346 4347 *skip = 0; 4348 switch (type) { 4349 case CEPH_MSG_OSD_MAP: 4350 case CEPH_MSG_WATCH_NOTIFY: 4351 return alloc_msg_with_page_vector(hdr); 4352 case CEPH_MSG_OSD_OPREPLY: 4353 return get_reply(con, hdr, skip); 4354 default: 4355 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 4356 osd->o_osd, type); 4357 *skip = 1; 4358 return NULL; 4359 } 4360 } 4361 4362 /* 4363 * Wrappers to refcount containing ceph_osd struct 4364 */ 4365 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 4366 { 4367 struct ceph_osd *osd = con->private; 4368 if (get_osd(osd)) 4369 return con; 4370 return NULL; 4371 } 4372 4373 static void put_osd_con(struct ceph_connection *con) 4374 { 4375 struct ceph_osd *osd = con->private; 4376 put_osd(osd); 4377 } 4378 4379 /* 4380 * authentication 4381 */ 4382 /* 4383 * Note: returned pointer is the address of a structure that's 4384 * managed separately. Caller must *not* attempt to free it. 4385 */ 4386 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 4387 int *proto, int force_new) 4388 { 4389 struct ceph_osd *o = con->private; 4390 struct ceph_osd_client *osdc = o->o_osdc; 4391 struct ceph_auth_client *ac = osdc->client->monc.auth; 4392 struct ceph_auth_handshake *auth = &o->o_auth; 4393 4394 if (force_new && auth->authorizer) { 4395 ceph_auth_destroy_authorizer(auth->authorizer); 4396 auth->authorizer = NULL; 4397 } 4398 if (!auth->authorizer) { 4399 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4400 auth); 4401 if (ret) 4402 return ERR_PTR(ret); 4403 } else { 4404 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4405 auth); 4406 if (ret) 4407 return ERR_PTR(ret); 4408 } 4409 *proto = ac->protocol; 4410 4411 return auth; 4412 } 4413 4414 4415 static int verify_authorizer_reply(struct ceph_connection *con) 4416 { 4417 struct ceph_osd *o = con->private; 4418 struct ceph_osd_client *osdc = o->o_osdc; 4419 struct ceph_auth_client *ac = osdc->client->monc.auth; 4420 4421 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer); 4422 } 4423 4424 static int invalidate_authorizer(struct ceph_connection *con) 4425 { 4426 struct ceph_osd *o = con->private; 4427 struct ceph_osd_client *osdc = o->o_osdc; 4428 struct ceph_auth_client *ac = osdc->client->monc.auth; 4429 4430 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 4431 return ceph_monc_validate_auth(&osdc->client->monc); 4432 } 4433 4434 static int osd_sign_message(struct ceph_msg *msg) 4435 { 4436 struct ceph_osd *o = msg->con->private; 4437 struct ceph_auth_handshake *auth = &o->o_auth; 4438 4439 return ceph_auth_sign_message(auth, msg); 4440 } 4441 4442 static int osd_check_message_signature(struct ceph_msg *msg) 4443 { 4444 struct ceph_osd *o = msg->con->private; 4445 struct ceph_auth_handshake *auth = &o->o_auth; 4446 4447 return ceph_auth_check_message_signature(auth, msg); 4448 } 4449 4450 static const struct ceph_connection_operations osd_con_ops = { 4451 .get = get_osd_con, 4452 .put = put_osd_con, 4453 .dispatch = dispatch, 4454 .get_authorizer = get_authorizer, 4455 .verify_authorizer_reply = verify_authorizer_reply, 4456 .invalidate_authorizer = invalidate_authorizer, 4457 .alloc_msg = alloc_msg, 4458 .sign_message = osd_sign_message, 4459 .check_message_signature = osd_check_message_signature, 4460 .fault = osd_fault, 4461 }; 4462