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 init_completion(&req->r_safe_completion); 464 RB_CLEAR_NODE(&req->r_node); 465 RB_CLEAR_NODE(&req->r_mc_node); 466 INIT_LIST_HEAD(&req->r_unsafe_item); 467 468 target_init(&req->r_t); 469 } 470 471 /* 472 * This is ugly, but it allows us to reuse linger registration and ping 473 * requests, keeping the structure of the code around send_linger{_ping}() 474 * reasonable. Setting up a min_nr=2 mempool for each linger request 475 * and dealing with copying ops (this blasts req only, watch op remains 476 * intact) isn't any better. 477 */ 478 static void request_reinit(struct ceph_osd_request *req) 479 { 480 struct ceph_osd_client *osdc = req->r_osdc; 481 bool mempool = req->r_mempool; 482 unsigned int num_ops = req->r_num_ops; 483 u64 snapid = req->r_snapid; 484 struct ceph_snap_context *snapc = req->r_snapc; 485 bool linger = req->r_linger; 486 struct ceph_msg *request_msg = req->r_request; 487 struct ceph_msg *reply_msg = req->r_reply; 488 489 dout("%s req %p\n", __func__, req); 490 WARN_ON(atomic_read(&req->r_kref.refcount) != 1); 491 request_release_checks(req); 492 493 WARN_ON(atomic_read(&request_msg->kref.refcount) != 1); 494 WARN_ON(atomic_read(&reply_msg->kref.refcount) != 1); 495 target_destroy(&req->r_t); 496 497 request_init(req); 498 req->r_osdc = osdc; 499 req->r_mempool = mempool; 500 req->r_num_ops = num_ops; 501 req->r_snapid = snapid; 502 req->r_snapc = snapc; 503 req->r_linger = linger; 504 req->r_request = request_msg; 505 req->r_reply = reply_msg; 506 } 507 508 struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 509 struct ceph_snap_context *snapc, 510 unsigned int num_ops, 511 bool use_mempool, 512 gfp_t gfp_flags) 513 { 514 struct ceph_osd_request *req; 515 516 if (use_mempool) { 517 BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); 518 req = mempool_alloc(osdc->req_mempool, gfp_flags); 519 } else if (num_ops <= CEPH_OSD_SLAB_OPS) { 520 req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); 521 } else { 522 BUG_ON(num_ops > CEPH_OSD_MAX_OPS); 523 req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]), 524 gfp_flags); 525 } 526 if (unlikely(!req)) 527 return NULL; 528 529 request_init(req); 530 req->r_osdc = osdc; 531 req->r_mempool = use_mempool; 532 req->r_num_ops = num_ops; 533 req->r_snapid = CEPH_NOSNAP; 534 req->r_snapc = ceph_get_snap_context(snapc); 535 536 dout("%s req %p\n", __func__, req); 537 return req; 538 } 539 EXPORT_SYMBOL(ceph_osdc_alloc_request); 540 541 static int ceph_oloc_encoding_size(struct ceph_object_locator *oloc) 542 { 543 return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); 544 } 545 546 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) 547 { 548 struct ceph_osd_client *osdc = req->r_osdc; 549 struct ceph_msg *msg; 550 int msg_size; 551 552 WARN_ON(ceph_oid_empty(&req->r_base_oid)); 553 WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); 554 555 /* create request message */ 556 msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */ 557 msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */ 558 msg_size += CEPH_ENCODING_START_BLK_LEN + 559 ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 560 msg_size += 1 + 8 + 4 + 4; /* pgid */ 561 msg_size += 4 + req->r_base_oid.name_len; /* oid */ 562 msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); 563 msg_size += 8; /* snapid */ 564 msg_size += 8; /* snap_seq */ 565 msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); 566 msg_size += 4; /* retry_attempt */ 567 568 if (req->r_mempool) 569 msg = ceph_msgpool_get(&osdc->msgpool_op, 0); 570 else 571 msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true); 572 if (!msg) 573 return -ENOMEM; 574 575 memset(msg->front.iov_base, 0, msg->front.iov_len); 576 req->r_request = msg; 577 578 /* create reply message */ 579 msg_size = OSD_OPREPLY_FRONT_LEN; 580 msg_size += req->r_base_oid.name_len; 581 msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); 582 583 if (req->r_mempool) 584 msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); 585 else 586 msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true); 587 if (!msg) 588 return -ENOMEM; 589 590 req->r_reply = msg; 591 592 return 0; 593 } 594 EXPORT_SYMBOL(ceph_osdc_alloc_messages); 595 596 static bool osd_req_opcode_valid(u16 opcode) 597 { 598 switch (opcode) { 599 #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; 600 __CEPH_FORALL_OSD_OPS(GENERATE_CASE) 601 #undef GENERATE_CASE 602 default: 603 return false; 604 } 605 } 606 607 /* 608 * This is an osd op init function for opcodes that have no data or 609 * other information associated with them. It also serves as a 610 * common init routine for all the other init functions, below. 611 */ 612 static struct ceph_osd_req_op * 613 _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, 614 u16 opcode, u32 flags) 615 { 616 struct ceph_osd_req_op *op; 617 618 BUG_ON(which >= osd_req->r_num_ops); 619 BUG_ON(!osd_req_opcode_valid(opcode)); 620 621 op = &osd_req->r_ops[which]; 622 memset(op, 0, sizeof (*op)); 623 op->op = opcode; 624 op->flags = flags; 625 626 return op; 627 } 628 629 void osd_req_op_init(struct ceph_osd_request *osd_req, 630 unsigned int which, u16 opcode, u32 flags) 631 { 632 (void)_osd_req_op_init(osd_req, which, opcode, flags); 633 } 634 EXPORT_SYMBOL(osd_req_op_init); 635 636 void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 637 unsigned int which, u16 opcode, 638 u64 offset, u64 length, 639 u64 truncate_size, u32 truncate_seq) 640 { 641 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 642 opcode, 0); 643 size_t payload_len = 0; 644 645 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 646 opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && 647 opcode != CEPH_OSD_OP_TRUNCATE); 648 649 op->extent.offset = offset; 650 op->extent.length = length; 651 op->extent.truncate_size = truncate_size; 652 op->extent.truncate_seq = truncate_seq; 653 if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) 654 payload_len += length; 655 656 op->indata_len = payload_len; 657 } 658 EXPORT_SYMBOL(osd_req_op_extent_init); 659 660 void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 661 unsigned int which, u64 length) 662 { 663 struct ceph_osd_req_op *op; 664 u64 previous; 665 666 BUG_ON(which >= osd_req->r_num_ops); 667 op = &osd_req->r_ops[which]; 668 previous = op->extent.length; 669 670 if (length == previous) 671 return; /* Nothing to do */ 672 BUG_ON(length > previous); 673 674 op->extent.length = length; 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 || req->r_got_reply); 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 unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK; 1708 1709 if (req->r_flags & CEPH_OSD_FLAG_READ) { 1710 WARN_ON(req->r_flags & mask); 1711 req->r_flags |= CEPH_OSD_FLAG_ACK; 1712 } else if (req->r_flags & CEPH_OSD_FLAG_WRITE) 1713 WARN_ON(!(req->r_flags & mask)); 1714 else 1715 WARN_ON(1); 1716 1717 WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask); 1718 atomic_inc(&req->r_osdc->num_requests); 1719 } 1720 1721 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 1722 { 1723 ceph_osdc_get_request(req); 1724 account_request(req); 1725 __submit_request(req, wrlocked); 1726 } 1727 1728 static void __finish_request(struct ceph_osd_request *req) 1729 { 1730 struct ceph_osd_client *osdc = req->r_osdc; 1731 struct ceph_osd *osd = req->r_osd; 1732 1733 verify_osd_locked(osd); 1734 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1735 1736 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 1737 unlink_request(osd, req); 1738 atomic_dec(&osdc->num_requests); 1739 1740 /* 1741 * If an OSD has failed or returned and a request has been sent 1742 * twice, it's possible to get a reply and end up here while the 1743 * request message is queued for delivery. We will ignore the 1744 * reply, so not a big deal, but better to try and catch it. 1745 */ 1746 ceph_msg_revoke(req->r_request); 1747 ceph_msg_revoke_incoming(req->r_reply); 1748 } 1749 1750 static void finish_request(struct ceph_osd_request *req) 1751 { 1752 __finish_request(req); 1753 ceph_osdc_put_request(req); 1754 } 1755 1756 static void __complete_request(struct ceph_osd_request *req) 1757 { 1758 if (req->r_callback) 1759 req->r_callback(req); 1760 else 1761 complete_all(&req->r_completion); 1762 } 1763 1764 /* 1765 * Note that this is open-coded in handle_reply(), which has to deal 1766 * with ack vs commit, dup acks, etc. 1767 */ 1768 static void complete_request(struct ceph_osd_request *req, int err) 1769 { 1770 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 1771 1772 req->r_result = err; 1773 __finish_request(req); 1774 __complete_request(req); 1775 complete_all(&req->r_safe_completion); 1776 ceph_osdc_put_request(req); 1777 } 1778 1779 static void cancel_map_check(struct ceph_osd_request *req) 1780 { 1781 struct ceph_osd_client *osdc = req->r_osdc; 1782 struct ceph_osd_request *lookup_req; 1783 1784 verify_osdc_wrlocked(osdc); 1785 1786 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1787 if (!lookup_req) 1788 return; 1789 1790 WARN_ON(lookup_req != req); 1791 erase_request_mc(&osdc->map_checks, req); 1792 ceph_osdc_put_request(req); 1793 } 1794 1795 static void cancel_request(struct ceph_osd_request *req) 1796 { 1797 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1798 1799 cancel_map_check(req); 1800 finish_request(req); 1801 } 1802 1803 static void check_pool_dne(struct ceph_osd_request *req) 1804 { 1805 struct ceph_osd_client *osdc = req->r_osdc; 1806 struct ceph_osdmap *map = osdc->osdmap; 1807 1808 verify_osdc_wrlocked(osdc); 1809 WARN_ON(!map->epoch); 1810 1811 if (req->r_attempts) { 1812 /* 1813 * We sent a request earlier, which means that 1814 * previously the pool existed, and now it does not 1815 * (i.e., it was deleted). 1816 */ 1817 req->r_map_dne_bound = map->epoch; 1818 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 1819 req->r_tid); 1820 } else { 1821 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 1822 req, req->r_tid, req->r_map_dne_bound, map->epoch); 1823 } 1824 1825 if (req->r_map_dne_bound) { 1826 if (map->epoch >= req->r_map_dne_bound) { 1827 /* we had a new enough map */ 1828 pr_info_ratelimited("tid %llu pool does not exist\n", 1829 req->r_tid); 1830 complete_request(req, -ENOENT); 1831 } 1832 } else { 1833 send_map_check(req); 1834 } 1835 } 1836 1837 static void map_check_cb(struct ceph_mon_generic_request *greq) 1838 { 1839 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 1840 struct ceph_osd_request *req; 1841 u64 tid = greq->private_data; 1842 1843 WARN_ON(greq->result || !greq->u.newest); 1844 1845 down_write(&osdc->lock); 1846 req = lookup_request_mc(&osdc->map_checks, tid); 1847 if (!req) { 1848 dout("%s tid %llu dne\n", __func__, tid); 1849 goto out_unlock; 1850 } 1851 1852 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 1853 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 1854 if (!req->r_map_dne_bound) 1855 req->r_map_dne_bound = greq->u.newest; 1856 erase_request_mc(&osdc->map_checks, req); 1857 check_pool_dne(req); 1858 1859 ceph_osdc_put_request(req); 1860 out_unlock: 1861 up_write(&osdc->lock); 1862 } 1863 1864 static void send_map_check(struct ceph_osd_request *req) 1865 { 1866 struct ceph_osd_client *osdc = req->r_osdc; 1867 struct ceph_osd_request *lookup_req; 1868 int ret; 1869 1870 verify_osdc_wrlocked(osdc); 1871 1872 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1873 if (lookup_req) { 1874 WARN_ON(lookup_req != req); 1875 return; 1876 } 1877 1878 ceph_osdc_get_request(req); 1879 insert_request_mc(&osdc->map_checks, req); 1880 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 1881 map_check_cb, req->r_tid); 1882 WARN_ON(ret); 1883 } 1884 1885 /* 1886 * lingering requests, watch/notify v2 infrastructure 1887 */ 1888 static void linger_release(struct kref *kref) 1889 { 1890 struct ceph_osd_linger_request *lreq = 1891 container_of(kref, struct ceph_osd_linger_request, kref); 1892 1893 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 1894 lreq->reg_req, lreq->ping_req); 1895 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 1896 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 1897 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 1898 WARN_ON(!list_empty(&lreq->scan_item)); 1899 WARN_ON(!list_empty(&lreq->pending_lworks)); 1900 WARN_ON(lreq->osd); 1901 1902 if (lreq->reg_req) 1903 ceph_osdc_put_request(lreq->reg_req); 1904 if (lreq->ping_req) 1905 ceph_osdc_put_request(lreq->ping_req); 1906 target_destroy(&lreq->t); 1907 kfree(lreq); 1908 } 1909 1910 static void linger_put(struct ceph_osd_linger_request *lreq) 1911 { 1912 if (lreq) 1913 kref_put(&lreq->kref, linger_release); 1914 } 1915 1916 static struct ceph_osd_linger_request * 1917 linger_get(struct ceph_osd_linger_request *lreq) 1918 { 1919 kref_get(&lreq->kref); 1920 return lreq; 1921 } 1922 1923 static struct ceph_osd_linger_request * 1924 linger_alloc(struct ceph_osd_client *osdc) 1925 { 1926 struct ceph_osd_linger_request *lreq; 1927 1928 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 1929 if (!lreq) 1930 return NULL; 1931 1932 kref_init(&lreq->kref); 1933 mutex_init(&lreq->lock); 1934 RB_CLEAR_NODE(&lreq->node); 1935 RB_CLEAR_NODE(&lreq->osdc_node); 1936 RB_CLEAR_NODE(&lreq->mc_node); 1937 INIT_LIST_HEAD(&lreq->scan_item); 1938 INIT_LIST_HEAD(&lreq->pending_lworks); 1939 init_completion(&lreq->reg_commit_wait); 1940 init_completion(&lreq->notify_finish_wait); 1941 1942 lreq->osdc = osdc; 1943 target_init(&lreq->t); 1944 1945 dout("%s lreq %p\n", __func__, lreq); 1946 return lreq; 1947 } 1948 1949 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 1950 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 1951 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 1952 1953 /* 1954 * Create linger request <-> OSD session relation. 1955 * 1956 * @lreq has to be registered, @osd may be homeless. 1957 */ 1958 static void link_linger(struct ceph_osd *osd, 1959 struct ceph_osd_linger_request *lreq) 1960 { 1961 verify_osd_locked(osd); 1962 WARN_ON(!lreq->linger_id || lreq->osd); 1963 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1964 osd->o_osd, lreq, lreq->linger_id); 1965 1966 if (!osd_homeless(osd)) 1967 __remove_osd_from_lru(osd); 1968 else 1969 atomic_inc(&osd->o_osdc->num_homeless); 1970 1971 get_osd(osd); 1972 insert_linger(&osd->o_linger_requests, lreq); 1973 lreq->osd = osd; 1974 } 1975 1976 static void unlink_linger(struct ceph_osd *osd, 1977 struct ceph_osd_linger_request *lreq) 1978 { 1979 verify_osd_locked(osd); 1980 WARN_ON(lreq->osd != osd); 1981 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1982 osd->o_osd, lreq, lreq->linger_id); 1983 1984 lreq->osd = NULL; 1985 erase_linger(&osd->o_linger_requests, lreq); 1986 put_osd(osd); 1987 1988 if (!osd_homeless(osd)) 1989 maybe_move_osd_to_lru(osd); 1990 else 1991 atomic_dec(&osd->o_osdc->num_homeless); 1992 } 1993 1994 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 1995 { 1996 verify_osdc_locked(lreq->osdc); 1997 1998 return !RB_EMPTY_NODE(&lreq->osdc_node); 1999 } 2000 2001 static bool linger_registered(struct ceph_osd_linger_request *lreq) 2002 { 2003 struct ceph_osd_client *osdc = lreq->osdc; 2004 bool registered; 2005 2006 down_read(&osdc->lock); 2007 registered = __linger_registered(lreq); 2008 up_read(&osdc->lock); 2009 2010 return registered; 2011 } 2012 2013 static void linger_register(struct ceph_osd_linger_request *lreq) 2014 { 2015 struct ceph_osd_client *osdc = lreq->osdc; 2016 2017 verify_osdc_wrlocked(osdc); 2018 WARN_ON(lreq->linger_id); 2019 2020 linger_get(lreq); 2021 lreq->linger_id = ++osdc->last_linger_id; 2022 insert_linger_osdc(&osdc->linger_requests, lreq); 2023 } 2024 2025 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2026 { 2027 struct ceph_osd_client *osdc = lreq->osdc; 2028 2029 verify_osdc_wrlocked(osdc); 2030 2031 erase_linger_osdc(&osdc->linger_requests, lreq); 2032 linger_put(lreq); 2033 } 2034 2035 static void cancel_linger_request(struct ceph_osd_request *req) 2036 { 2037 struct ceph_osd_linger_request *lreq = req->r_priv; 2038 2039 WARN_ON(!req->r_linger); 2040 cancel_request(req); 2041 linger_put(lreq); 2042 } 2043 2044 struct linger_work { 2045 struct work_struct work; 2046 struct ceph_osd_linger_request *lreq; 2047 struct list_head pending_item; 2048 unsigned long queued_stamp; 2049 2050 union { 2051 struct { 2052 u64 notify_id; 2053 u64 notifier_id; 2054 void *payload; /* points into @msg front */ 2055 size_t payload_len; 2056 2057 struct ceph_msg *msg; /* for ceph_msg_put() */ 2058 } notify; 2059 struct { 2060 int err; 2061 } error; 2062 }; 2063 }; 2064 2065 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2066 work_func_t workfn) 2067 { 2068 struct linger_work *lwork; 2069 2070 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2071 if (!lwork) 2072 return NULL; 2073 2074 INIT_WORK(&lwork->work, workfn); 2075 INIT_LIST_HEAD(&lwork->pending_item); 2076 lwork->lreq = linger_get(lreq); 2077 2078 return lwork; 2079 } 2080 2081 static void lwork_free(struct linger_work *lwork) 2082 { 2083 struct ceph_osd_linger_request *lreq = lwork->lreq; 2084 2085 mutex_lock(&lreq->lock); 2086 list_del(&lwork->pending_item); 2087 mutex_unlock(&lreq->lock); 2088 2089 linger_put(lreq); 2090 kfree(lwork); 2091 } 2092 2093 static void lwork_queue(struct linger_work *lwork) 2094 { 2095 struct ceph_osd_linger_request *lreq = lwork->lreq; 2096 struct ceph_osd_client *osdc = lreq->osdc; 2097 2098 verify_lreq_locked(lreq); 2099 WARN_ON(!list_empty(&lwork->pending_item)); 2100 2101 lwork->queued_stamp = jiffies; 2102 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2103 queue_work(osdc->notify_wq, &lwork->work); 2104 } 2105 2106 static void do_watch_notify(struct work_struct *w) 2107 { 2108 struct linger_work *lwork = container_of(w, struct linger_work, work); 2109 struct ceph_osd_linger_request *lreq = lwork->lreq; 2110 2111 if (!linger_registered(lreq)) { 2112 dout("%s lreq %p not registered\n", __func__, lreq); 2113 goto out; 2114 } 2115 2116 WARN_ON(!lreq->is_watch); 2117 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2118 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2119 lwork->notify.payload_len); 2120 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2121 lwork->notify.notifier_id, lwork->notify.payload, 2122 lwork->notify.payload_len); 2123 2124 out: 2125 ceph_msg_put(lwork->notify.msg); 2126 lwork_free(lwork); 2127 } 2128 2129 static void do_watch_error(struct work_struct *w) 2130 { 2131 struct linger_work *lwork = container_of(w, struct linger_work, work); 2132 struct ceph_osd_linger_request *lreq = lwork->lreq; 2133 2134 if (!linger_registered(lreq)) { 2135 dout("%s lreq %p not registered\n", __func__, lreq); 2136 goto out; 2137 } 2138 2139 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2140 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2141 2142 out: 2143 lwork_free(lwork); 2144 } 2145 2146 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2147 { 2148 struct linger_work *lwork; 2149 2150 lwork = lwork_alloc(lreq, do_watch_error); 2151 if (!lwork) { 2152 pr_err("failed to allocate error-lwork\n"); 2153 return; 2154 } 2155 2156 lwork->error.err = lreq->last_error; 2157 lwork_queue(lwork); 2158 } 2159 2160 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2161 int result) 2162 { 2163 if (!completion_done(&lreq->reg_commit_wait)) { 2164 lreq->reg_commit_error = (result <= 0 ? result : 0); 2165 complete_all(&lreq->reg_commit_wait); 2166 } 2167 } 2168 2169 static void linger_commit_cb(struct ceph_osd_request *req) 2170 { 2171 struct ceph_osd_linger_request *lreq = req->r_priv; 2172 2173 mutex_lock(&lreq->lock); 2174 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2175 lreq->linger_id, req->r_result); 2176 WARN_ON(!__linger_registered(lreq)); 2177 linger_reg_commit_complete(lreq, req->r_result); 2178 lreq->committed = true; 2179 2180 if (!lreq->is_watch) { 2181 struct ceph_osd_data *osd_data = 2182 osd_req_op_data(req, 0, notify, response_data); 2183 void *p = page_address(osd_data->pages[0]); 2184 2185 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2186 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2187 2188 /* make note of the notify_id */ 2189 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2190 lreq->notify_id = ceph_decode_64(&p); 2191 dout("lreq %p notify_id %llu\n", lreq, 2192 lreq->notify_id); 2193 } else { 2194 dout("lreq %p no notify_id\n", lreq); 2195 } 2196 } 2197 2198 mutex_unlock(&lreq->lock); 2199 linger_put(lreq); 2200 } 2201 2202 static int normalize_watch_error(int err) 2203 { 2204 /* 2205 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2206 * notification and a failure to reconnect because we raced with 2207 * the delete appear the same to the user. 2208 */ 2209 if (err == -ENOENT) 2210 err = -ENOTCONN; 2211 2212 return err; 2213 } 2214 2215 static void linger_reconnect_cb(struct ceph_osd_request *req) 2216 { 2217 struct ceph_osd_linger_request *lreq = req->r_priv; 2218 2219 mutex_lock(&lreq->lock); 2220 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2221 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2222 if (req->r_result < 0) { 2223 if (!lreq->last_error) { 2224 lreq->last_error = normalize_watch_error(req->r_result); 2225 queue_watch_error(lreq); 2226 } 2227 } 2228 2229 mutex_unlock(&lreq->lock); 2230 linger_put(lreq); 2231 } 2232 2233 static void send_linger(struct ceph_osd_linger_request *lreq) 2234 { 2235 struct ceph_osd_request *req = lreq->reg_req; 2236 struct ceph_osd_req_op *op = &req->r_ops[0]; 2237 2238 verify_osdc_wrlocked(req->r_osdc); 2239 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2240 2241 if (req->r_osd) 2242 cancel_linger_request(req); 2243 2244 request_reinit(req); 2245 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 2246 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 2247 req->r_flags = lreq->t.flags; 2248 req->r_mtime = lreq->mtime; 2249 2250 mutex_lock(&lreq->lock); 2251 if (lreq->is_watch && lreq->committed) { 2252 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2253 op->watch.cookie != lreq->linger_id); 2254 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 2255 op->watch.gen = ++lreq->register_gen; 2256 dout("lreq %p reconnect register_gen %u\n", lreq, 2257 op->watch.gen); 2258 req->r_callback = linger_reconnect_cb; 2259 } else { 2260 if (!lreq->is_watch) 2261 lreq->notify_id = 0; 2262 else 2263 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 2264 dout("lreq %p register\n", lreq); 2265 req->r_callback = linger_commit_cb; 2266 } 2267 mutex_unlock(&lreq->lock); 2268 2269 req->r_priv = linger_get(lreq); 2270 req->r_linger = true; 2271 2272 submit_request(req, true); 2273 } 2274 2275 static void linger_ping_cb(struct ceph_osd_request *req) 2276 { 2277 struct ceph_osd_linger_request *lreq = req->r_priv; 2278 2279 mutex_lock(&lreq->lock); 2280 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 2281 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 2282 lreq->last_error); 2283 if (lreq->register_gen == req->r_ops[0].watch.gen) { 2284 if (!req->r_result) { 2285 lreq->watch_valid_thru = lreq->ping_sent; 2286 } else if (!lreq->last_error) { 2287 lreq->last_error = normalize_watch_error(req->r_result); 2288 queue_watch_error(lreq); 2289 } 2290 } else { 2291 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 2292 lreq->register_gen, req->r_ops[0].watch.gen); 2293 } 2294 2295 mutex_unlock(&lreq->lock); 2296 linger_put(lreq); 2297 } 2298 2299 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 2300 { 2301 struct ceph_osd_client *osdc = lreq->osdc; 2302 struct ceph_osd_request *req = lreq->ping_req; 2303 struct ceph_osd_req_op *op = &req->r_ops[0]; 2304 2305 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2306 dout("%s PAUSERD\n", __func__); 2307 return; 2308 } 2309 2310 lreq->ping_sent = jiffies; 2311 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 2312 __func__, lreq, lreq->linger_id, lreq->ping_sent, 2313 lreq->register_gen); 2314 2315 if (req->r_osd) 2316 cancel_linger_request(req); 2317 2318 request_reinit(req); 2319 target_copy(&req->r_t, &lreq->t); 2320 2321 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2322 op->watch.cookie != lreq->linger_id || 2323 op->watch.op != CEPH_OSD_WATCH_OP_PING); 2324 op->watch.gen = lreq->register_gen; 2325 req->r_callback = linger_ping_cb; 2326 req->r_priv = linger_get(lreq); 2327 req->r_linger = true; 2328 2329 ceph_osdc_get_request(req); 2330 account_request(req); 2331 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2332 link_request(lreq->osd, req); 2333 send_request(req); 2334 } 2335 2336 static void linger_submit(struct ceph_osd_linger_request *lreq) 2337 { 2338 struct ceph_osd_client *osdc = lreq->osdc; 2339 struct ceph_osd *osd; 2340 2341 calc_target(osdc, &lreq->t, &lreq->last_force_resend, false); 2342 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2343 link_linger(osd, lreq); 2344 2345 send_linger(lreq); 2346 } 2347 2348 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 2349 { 2350 struct ceph_osd_client *osdc = lreq->osdc; 2351 struct ceph_osd_linger_request *lookup_lreq; 2352 2353 verify_osdc_wrlocked(osdc); 2354 2355 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2356 lreq->linger_id); 2357 if (!lookup_lreq) 2358 return; 2359 2360 WARN_ON(lookup_lreq != lreq); 2361 erase_linger_mc(&osdc->linger_map_checks, lreq); 2362 linger_put(lreq); 2363 } 2364 2365 /* 2366 * @lreq has to be both registered and linked. 2367 */ 2368 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 2369 { 2370 if (lreq->is_watch && lreq->ping_req->r_osd) 2371 cancel_linger_request(lreq->ping_req); 2372 if (lreq->reg_req->r_osd) 2373 cancel_linger_request(lreq->reg_req); 2374 cancel_linger_map_check(lreq); 2375 unlink_linger(lreq->osd, lreq); 2376 linger_unregister(lreq); 2377 } 2378 2379 static void linger_cancel(struct ceph_osd_linger_request *lreq) 2380 { 2381 struct ceph_osd_client *osdc = lreq->osdc; 2382 2383 down_write(&osdc->lock); 2384 if (__linger_registered(lreq)) 2385 __linger_cancel(lreq); 2386 up_write(&osdc->lock); 2387 } 2388 2389 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 2390 2391 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 2392 { 2393 struct ceph_osd_client *osdc = lreq->osdc; 2394 struct ceph_osdmap *map = osdc->osdmap; 2395 2396 verify_osdc_wrlocked(osdc); 2397 WARN_ON(!map->epoch); 2398 2399 if (lreq->register_gen) { 2400 lreq->map_dne_bound = map->epoch; 2401 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 2402 lreq, lreq->linger_id); 2403 } else { 2404 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 2405 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2406 map->epoch); 2407 } 2408 2409 if (lreq->map_dne_bound) { 2410 if (map->epoch >= lreq->map_dne_bound) { 2411 /* we had a new enough map */ 2412 pr_info("linger_id %llu pool does not exist\n", 2413 lreq->linger_id); 2414 linger_reg_commit_complete(lreq, -ENOENT); 2415 __linger_cancel(lreq); 2416 } 2417 } else { 2418 send_linger_map_check(lreq); 2419 } 2420 } 2421 2422 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 2423 { 2424 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2425 struct ceph_osd_linger_request *lreq; 2426 u64 linger_id = greq->private_data; 2427 2428 WARN_ON(greq->result || !greq->u.newest); 2429 2430 down_write(&osdc->lock); 2431 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 2432 if (!lreq) { 2433 dout("%s linger_id %llu dne\n", __func__, linger_id); 2434 goto out_unlock; 2435 } 2436 2437 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 2438 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2439 greq->u.newest); 2440 if (!lreq->map_dne_bound) 2441 lreq->map_dne_bound = greq->u.newest; 2442 erase_linger_mc(&osdc->linger_map_checks, lreq); 2443 check_linger_pool_dne(lreq); 2444 2445 linger_put(lreq); 2446 out_unlock: 2447 up_write(&osdc->lock); 2448 } 2449 2450 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 2451 { 2452 struct ceph_osd_client *osdc = lreq->osdc; 2453 struct ceph_osd_linger_request *lookup_lreq; 2454 int ret; 2455 2456 verify_osdc_wrlocked(osdc); 2457 2458 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2459 lreq->linger_id); 2460 if (lookup_lreq) { 2461 WARN_ON(lookup_lreq != lreq); 2462 return; 2463 } 2464 2465 linger_get(lreq); 2466 insert_linger_mc(&osdc->linger_map_checks, lreq); 2467 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2468 linger_map_check_cb, lreq->linger_id); 2469 WARN_ON(ret); 2470 } 2471 2472 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 2473 { 2474 int ret; 2475 2476 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2477 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 2478 return ret ?: lreq->reg_commit_error; 2479 } 2480 2481 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 2482 { 2483 int ret; 2484 2485 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2486 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 2487 return ret ?: lreq->notify_finish_error; 2488 } 2489 2490 /* 2491 * Timeout callback, called every N seconds. When 1 or more OSD 2492 * requests has been active for more than N seconds, we send a keepalive 2493 * (tag + timestamp) to its OSD to ensure any communications channel 2494 * reset is detected. 2495 */ 2496 static void handle_timeout(struct work_struct *work) 2497 { 2498 struct ceph_osd_client *osdc = 2499 container_of(work, struct ceph_osd_client, timeout_work.work); 2500 struct ceph_options *opts = osdc->client->options; 2501 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 2502 LIST_HEAD(slow_osds); 2503 struct rb_node *n, *p; 2504 2505 dout("%s osdc %p\n", __func__, osdc); 2506 down_write(&osdc->lock); 2507 2508 /* 2509 * ping osds that are a bit slow. this ensures that if there 2510 * is a break in the TCP connection we will notice, and reopen 2511 * a connection with that osd (from the fault callback). 2512 */ 2513 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 2514 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 2515 bool found = false; 2516 2517 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 2518 struct ceph_osd_request *req = 2519 rb_entry(p, struct ceph_osd_request, r_node); 2520 2521 if (time_before(req->r_stamp, cutoff)) { 2522 dout(" req %p tid %llu on osd%d is laggy\n", 2523 req, req->r_tid, osd->o_osd); 2524 found = true; 2525 } 2526 } 2527 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 2528 struct ceph_osd_linger_request *lreq = 2529 rb_entry(p, struct ceph_osd_linger_request, node); 2530 2531 dout(" lreq %p linger_id %llu is served by osd%d\n", 2532 lreq, lreq->linger_id, osd->o_osd); 2533 found = true; 2534 2535 mutex_lock(&lreq->lock); 2536 if (lreq->is_watch && lreq->committed && !lreq->last_error) 2537 send_linger_ping(lreq); 2538 mutex_unlock(&lreq->lock); 2539 } 2540 2541 if (found) 2542 list_move_tail(&osd->o_keepalive_item, &slow_osds); 2543 } 2544 2545 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 2546 maybe_request_map(osdc); 2547 2548 while (!list_empty(&slow_osds)) { 2549 struct ceph_osd *osd = list_first_entry(&slow_osds, 2550 struct ceph_osd, 2551 o_keepalive_item); 2552 list_del_init(&osd->o_keepalive_item); 2553 ceph_con_keepalive(&osd->o_con); 2554 } 2555 2556 up_write(&osdc->lock); 2557 schedule_delayed_work(&osdc->timeout_work, 2558 osdc->client->options->osd_keepalive_timeout); 2559 } 2560 2561 static void handle_osds_timeout(struct work_struct *work) 2562 { 2563 struct ceph_osd_client *osdc = 2564 container_of(work, struct ceph_osd_client, 2565 osds_timeout_work.work); 2566 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 2567 struct ceph_osd *osd, *nosd; 2568 2569 dout("%s osdc %p\n", __func__, osdc); 2570 down_write(&osdc->lock); 2571 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 2572 if (time_before(jiffies, osd->lru_ttl)) 2573 break; 2574 2575 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 2576 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 2577 close_osd(osd); 2578 } 2579 2580 up_write(&osdc->lock); 2581 schedule_delayed_work(&osdc->osds_timeout_work, 2582 round_jiffies_relative(delay)); 2583 } 2584 2585 static int ceph_oloc_decode(void **p, void *end, 2586 struct ceph_object_locator *oloc) 2587 { 2588 u8 struct_v, struct_cv; 2589 u32 len; 2590 void *struct_end; 2591 int ret = 0; 2592 2593 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2594 struct_v = ceph_decode_8(p); 2595 struct_cv = ceph_decode_8(p); 2596 if (struct_v < 3) { 2597 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 2598 struct_v, struct_cv); 2599 goto e_inval; 2600 } 2601 if (struct_cv > 6) { 2602 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 2603 struct_v, struct_cv); 2604 goto e_inval; 2605 } 2606 len = ceph_decode_32(p); 2607 ceph_decode_need(p, end, len, e_inval); 2608 struct_end = *p + len; 2609 2610 oloc->pool = ceph_decode_64(p); 2611 *p += 4; /* skip preferred */ 2612 2613 len = ceph_decode_32(p); 2614 if (len > 0) { 2615 pr_warn("ceph_object_locator::key is set\n"); 2616 goto e_inval; 2617 } 2618 2619 if (struct_v >= 5) { 2620 bool changed = false; 2621 2622 len = ceph_decode_32(p); 2623 if (len > 0) { 2624 ceph_decode_need(p, end, len, e_inval); 2625 if (!oloc->pool_ns || 2626 ceph_compare_string(oloc->pool_ns, *p, len)) 2627 changed = true; 2628 *p += len; 2629 } else { 2630 if (oloc->pool_ns) 2631 changed = true; 2632 } 2633 if (changed) { 2634 /* redirect changes namespace */ 2635 pr_warn("ceph_object_locator::nspace is changed\n"); 2636 goto e_inval; 2637 } 2638 } 2639 2640 if (struct_v >= 6) { 2641 s64 hash = ceph_decode_64(p); 2642 if (hash != -1) { 2643 pr_warn("ceph_object_locator::hash is set\n"); 2644 goto e_inval; 2645 } 2646 } 2647 2648 /* skip the rest */ 2649 *p = struct_end; 2650 out: 2651 return ret; 2652 2653 e_inval: 2654 ret = -EINVAL; 2655 goto out; 2656 } 2657 2658 static int ceph_redirect_decode(void **p, void *end, 2659 struct ceph_request_redirect *redir) 2660 { 2661 u8 struct_v, struct_cv; 2662 u32 len; 2663 void *struct_end; 2664 int ret; 2665 2666 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2667 struct_v = ceph_decode_8(p); 2668 struct_cv = ceph_decode_8(p); 2669 if (struct_cv > 1) { 2670 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 2671 struct_v, struct_cv); 2672 goto e_inval; 2673 } 2674 len = ceph_decode_32(p); 2675 ceph_decode_need(p, end, len, e_inval); 2676 struct_end = *p + len; 2677 2678 ret = ceph_oloc_decode(p, end, &redir->oloc); 2679 if (ret) 2680 goto out; 2681 2682 len = ceph_decode_32(p); 2683 if (len > 0) { 2684 pr_warn("ceph_request_redirect::object_name is set\n"); 2685 goto e_inval; 2686 } 2687 2688 len = ceph_decode_32(p); 2689 *p += len; /* skip osd_instructions */ 2690 2691 /* skip the rest */ 2692 *p = struct_end; 2693 out: 2694 return ret; 2695 2696 e_inval: 2697 ret = -EINVAL; 2698 goto out; 2699 } 2700 2701 struct MOSDOpReply { 2702 struct ceph_pg pgid; 2703 u64 flags; 2704 int result; 2705 u32 epoch; 2706 int num_ops; 2707 u32 outdata_len[CEPH_OSD_MAX_OPS]; 2708 s32 rval[CEPH_OSD_MAX_OPS]; 2709 int retry_attempt; 2710 struct ceph_eversion replay_version; 2711 u64 user_version; 2712 struct ceph_request_redirect redirect; 2713 }; 2714 2715 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 2716 { 2717 void *p = msg->front.iov_base; 2718 void *const end = p + msg->front.iov_len; 2719 u16 version = le16_to_cpu(msg->hdr.version); 2720 struct ceph_eversion bad_replay_version; 2721 u8 decode_redir; 2722 u32 len; 2723 int ret; 2724 int i; 2725 2726 ceph_decode_32_safe(&p, end, len, e_inval); 2727 ceph_decode_need(&p, end, len, e_inval); 2728 p += len; /* skip oid */ 2729 2730 ret = ceph_decode_pgid(&p, end, &m->pgid); 2731 if (ret) 2732 return ret; 2733 2734 ceph_decode_64_safe(&p, end, m->flags, e_inval); 2735 ceph_decode_32_safe(&p, end, m->result, e_inval); 2736 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 2737 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 2738 p += sizeof(bad_replay_version); 2739 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 2740 2741 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 2742 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 2743 goto e_inval; 2744 2745 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 2746 e_inval); 2747 for (i = 0; i < m->num_ops; i++) { 2748 struct ceph_osd_op *op = p; 2749 2750 m->outdata_len[i] = le32_to_cpu(op->payload_len); 2751 p += sizeof(*op); 2752 } 2753 2754 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 2755 for (i = 0; i < m->num_ops; i++) 2756 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 2757 2758 if (version >= 5) { 2759 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 2760 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 2761 p += sizeof(m->replay_version); 2762 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 2763 } else { 2764 m->replay_version = bad_replay_version; /* struct */ 2765 m->user_version = le64_to_cpu(m->replay_version.version); 2766 } 2767 2768 if (version >= 6) { 2769 if (version >= 7) 2770 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 2771 else 2772 decode_redir = 1; 2773 } else { 2774 decode_redir = 0; 2775 } 2776 2777 if (decode_redir) { 2778 ret = ceph_redirect_decode(&p, end, &m->redirect); 2779 if (ret) 2780 return ret; 2781 } else { 2782 ceph_oloc_init(&m->redirect.oloc); 2783 } 2784 2785 return 0; 2786 2787 e_inval: 2788 return -EINVAL; 2789 } 2790 2791 /* 2792 * We are done with @req if 2793 * - @m is a safe reply, or 2794 * - @m is an unsafe reply and we didn't want a safe one 2795 */ 2796 static bool done_request(const struct ceph_osd_request *req, 2797 const struct MOSDOpReply *m) 2798 { 2799 return (m->result < 0 || 2800 (m->flags & CEPH_OSD_FLAG_ONDISK) || 2801 !(req->r_flags & CEPH_OSD_FLAG_ONDISK)); 2802 } 2803 2804 /* 2805 * handle osd op reply. either call the callback if it is specified, 2806 * or do the completion to wake up the waiting thread. 2807 * 2808 * ->r_unsafe_callback is set? yes no 2809 * 2810 * first reply is OK (needed r_cb/r_completion, r_cb/r_completion, 2811 * any or needed/got safe) r_safe_completion r_safe_completion 2812 * 2813 * first reply is unsafe r_unsafe_cb(true) (nothing) 2814 * 2815 * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion, 2816 * r_safe_completion r_safe_completion 2817 */ 2818 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 2819 { 2820 struct ceph_osd_client *osdc = osd->o_osdc; 2821 struct ceph_osd_request *req; 2822 struct MOSDOpReply m; 2823 u64 tid = le64_to_cpu(msg->hdr.tid); 2824 u32 data_len = 0; 2825 bool already_acked; 2826 int ret; 2827 int i; 2828 2829 dout("%s msg %p tid %llu\n", __func__, msg, tid); 2830 2831 down_read(&osdc->lock); 2832 if (!osd_registered(osd)) { 2833 dout("%s osd%d unknown\n", __func__, osd->o_osd); 2834 goto out_unlock_osdc; 2835 } 2836 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 2837 2838 mutex_lock(&osd->lock); 2839 req = lookup_request(&osd->o_requests, tid); 2840 if (!req) { 2841 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 2842 goto out_unlock_session; 2843 } 2844 2845 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 2846 ret = decode_MOSDOpReply(msg, &m); 2847 m.redirect.oloc.pool_ns = NULL; 2848 if (ret) { 2849 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 2850 req->r_tid, ret); 2851 ceph_msg_dump(msg); 2852 goto fail_request; 2853 } 2854 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 2855 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 2856 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 2857 le64_to_cpu(m.replay_version.version), m.user_version); 2858 2859 if (m.retry_attempt >= 0) { 2860 if (m.retry_attempt != req->r_attempts - 1) { 2861 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 2862 req, req->r_tid, m.retry_attempt, 2863 req->r_attempts - 1); 2864 goto out_unlock_session; 2865 } 2866 } else { 2867 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 2868 } 2869 2870 if (!ceph_oloc_empty(&m.redirect.oloc)) { 2871 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 2872 m.redirect.oloc.pool); 2873 unlink_request(osd, req); 2874 mutex_unlock(&osd->lock); 2875 2876 /* 2877 * Not ceph_oloc_copy() - changing pool_ns is not 2878 * supported. 2879 */ 2880 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 2881 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED; 2882 req->r_tid = 0; 2883 __submit_request(req, false); 2884 goto out_unlock_osdc; 2885 } 2886 2887 if (m.num_ops != req->r_num_ops) { 2888 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 2889 req->r_num_ops, req->r_tid); 2890 goto fail_request; 2891 } 2892 for (i = 0; i < req->r_num_ops; i++) { 2893 dout(" req %p tid %llu op %d rval %d len %u\n", req, 2894 req->r_tid, i, m.rval[i], m.outdata_len[i]); 2895 req->r_ops[i].rval = m.rval[i]; 2896 req->r_ops[i].outdata_len = m.outdata_len[i]; 2897 data_len += m.outdata_len[i]; 2898 } 2899 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 2900 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 2901 le32_to_cpu(msg->hdr.data_len), req->r_tid); 2902 goto fail_request; 2903 } 2904 dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__, 2905 req, req->r_tid, req->r_got_reply, m.result, data_len); 2906 2907 already_acked = req->r_got_reply; 2908 if (!already_acked) { 2909 req->r_result = m.result ?: data_len; 2910 req->r_replay_version = m.replay_version; /* struct */ 2911 req->r_got_reply = true; 2912 } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) { 2913 dout("req %p tid %llu dup ack\n", req, req->r_tid); 2914 goto out_unlock_session; 2915 } 2916 2917 if (done_request(req, &m)) { 2918 __finish_request(req); 2919 if (req->r_linger) { 2920 WARN_ON(req->r_unsafe_callback); 2921 dout("req %p tid %llu cb (locked)\n", req, req->r_tid); 2922 __complete_request(req); 2923 } 2924 } 2925 2926 mutex_unlock(&osd->lock); 2927 up_read(&osdc->lock); 2928 2929 if (done_request(req, &m)) { 2930 if (already_acked && req->r_unsafe_callback) { 2931 dout("req %p tid %llu safe-cb\n", req, req->r_tid); 2932 req->r_unsafe_callback(req, false); 2933 } else if (!req->r_linger) { 2934 dout("req %p tid %llu cb\n", req, req->r_tid); 2935 __complete_request(req); 2936 } 2937 if (m.flags & CEPH_OSD_FLAG_ONDISK) 2938 complete_all(&req->r_safe_completion); 2939 ceph_osdc_put_request(req); 2940 } else { 2941 if (req->r_unsafe_callback) { 2942 dout("req %p tid %llu unsafe-cb\n", req, req->r_tid); 2943 req->r_unsafe_callback(req, true); 2944 } else { 2945 WARN_ON(1); 2946 } 2947 } 2948 2949 return; 2950 2951 fail_request: 2952 complete_request(req, -EIO); 2953 out_unlock_session: 2954 mutex_unlock(&osd->lock); 2955 out_unlock_osdc: 2956 up_read(&osdc->lock); 2957 } 2958 2959 static void set_pool_was_full(struct ceph_osd_client *osdc) 2960 { 2961 struct rb_node *n; 2962 2963 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 2964 struct ceph_pg_pool_info *pi = 2965 rb_entry(n, struct ceph_pg_pool_info, node); 2966 2967 pi->was_full = __pool_full(pi); 2968 } 2969 } 2970 2971 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 2972 { 2973 struct ceph_pg_pool_info *pi; 2974 2975 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 2976 if (!pi) 2977 return false; 2978 2979 return pi->was_full && !__pool_full(pi); 2980 } 2981 2982 static enum calc_target_result 2983 recalc_linger_target(struct ceph_osd_linger_request *lreq) 2984 { 2985 struct ceph_osd_client *osdc = lreq->osdc; 2986 enum calc_target_result ct_res; 2987 2988 ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true); 2989 if (ct_res == CALC_TARGET_NEED_RESEND) { 2990 struct ceph_osd *osd; 2991 2992 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2993 if (osd != lreq->osd) { 2994 unlink_linger(lreq->osd, lreq); 2995 link_linger(osd, lreq); 2996 } 2997 } 2998 2999 return ct_res; 3000 } 3001 3002 /* 3003 * Requeue requests whose mapping to an OSD has changed. 3004 */ 3005 static void scan_requests(struct ceph_osd *osd, 3006 bool force_resend, 3007 bool cleared_full, 3008 bool check_pool_cleared_full, 3009 struct rb_root *need_resend, 3010 struct list_head *need_resend_linger) 3011 { 3012 struct ceph_osd_client *osdc = osd->o_osdc; 3013 struct rb_node *n; 3014 bool force_resend_writes; 3015 3016 for (n = rb_first(&osd->o_linger_requests); n; ) { 3017 struct ceph_osd_linger_request *lreq = 3018 rb_entry(n, struct ceph_osd_linger_request, node); 3019 enum calc_target_result ct_res; 3020 3021 n = rb_next(n); /* recalc_linger_target() */ 3022 3023 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 3024 lreq->linger_id); 3025 ct_res = recalc_linger_target(lreq); 3026 switch (ct_res) { 3027 case CALC_TARGET_NO_ACTION: 3028 force_resend_writes = cleared_full || 3029 (check_pool_cleared_full && 3030 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 3031 if (!force_resend && !force_resend_writes) 3032 break; 3033 3034 /* fall through */ 3035 case CALC_TARGET_NEED_RESEND: 3036 cancel_linger_map_check(lreq); 3037 /* 3038 * scan_requests() for the previous epoch(s) 3039 * may have already added it to the list, since 3040 * it's not unlinked here. 3041 */ 3042 if (list_empty(&lreq->scan_item)) 3043 list_add_tail(&lreq->scan_item, need_resend_linger); 3044 break; 3045 case CALC_TARGET_POOL_DNE: 3046 check_linger_pool_dne(lreq); 3047 break; 3048 } 3049 } 3050 3051 for (n = rb_first(&osd->o_requests); n; ) { 3052 struct ceph_osd_request *req = 3053 rb_entry(n, struct ceph_osd_request, r_node); 3054 enum calc_target_result ct_res; 3055 3056 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3057 3058 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3059 ct_res = calc_target(osdc, &req->r_t, 3060 &req->r_last_force_resend, false); 3061 switch (ct_res) { 3062 case CALC_TARGET_NO_ACTION: 3063 force_resend_writes = cleared_full || 3064 (check_pool_cleared_full && 3065 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3066 if (!force_resend && 3067 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3068 !force_resend_writes)) 3069 break; 3070 3071 /* fall through */ 3072 case CALC_TARGET_NEED_RESEND: 3073 cancel_map_check(req); 3074 unlink_request(osd, req); 3075 insert_request(need_resend, req); 3076 break; 3077 case CALC_TARGET_POOL_DNE: 3078 check_pool_dne(req); 3079 break; 3080 } 3081 } 3082 } 3083 3084 static int handle_one_map(struct ceph_osd_client *osdc, 3085 void *p, void *end, bool incremental, 3086 struct rb_root *need_resend, 3087 struct list_head *need_resend_linger) 3088 { 3089 struct ceph_osdmap *newmap; 3090 struct rb_node *n; 3091 bool skipped_map = false; 3092 bool was_full; 3093 3094 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3095 set_pool_was_full(osdc); 3096 3097 if (incremental) 3098 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3099 else 3100 newmap = ceph_osdmap_decode(&p, end); 3101 if (IS_ERR(newmap)) 3102 return PTR_ERR(newmap); 3103 3104 if (newmap != osdc->osdmap) { 3105 /* 3106 * Preserve ->was_full before destroying the old map. 3107 * For pools that weren't in the old map, ->was_full 3108 * should be false. 3109 */ 3110 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3111 struct ceph_pg_pool_info *pi = 3112 rb_entry(n, struct ceph_pg_pool_info, node); 3113 struct ceph_pg_pool_info *old_pi; 3114 3115 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3116 if (old_pi) 3117 pi->was_full = old_pi->was_full; 3118 else 3119 WARN_ON(pi->was_full); 3120 } 3121 3122 if (osdc->osdmap->epoch && 3123 osdc->osdmap->epoch + 1 < newmap->epoch) { 3124 WARN_ON(incremental); 3125 skipped_map = true; 3126 } 3127 3128 ceph_osdmap_destroy(osdc->osdmap); 3129 osdc->osdmap = newmap; 3130 } 3131 3132 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3133 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3134 need_resend, need_resend_linger); 3135 3136 for (n = rb_first(&osdc->osds); n; ) { 3137 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3138 3139 n = rb_next(n); /* close_osd() */ 3140 3141 scan_requests(osd, skipped_map, was_full, true, need_resend, 3142 need_resend_linger); 3143 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3144 memcmp(&osd->o_con.peer_addr, 3145 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3146 sizeof(struct ceph_entity_addr))) 3147 close_osd(osd); 3148 } 3149 3150 return 0; 3151 } 3152 3153 static void kick_requests(struct ceph_osd_client *osdc, 3154 struct rb_root *need_resend, 3155 struct list_head *need_resend_linger) 3156 { 3157 struct ceph_osd_linger_request *lreq, *nlreq; 3158 struct rb_node *n; 3159 3160 for (n = rb_first(need_resend); n; ) { 3161 struct ceph_osd_request *req = 3162 rb_entry(n, struct ceph_osd_request, r_node); 3163 struct ceph_osd *osd; 3164 3165 n = rb_next(n); 3166 erase_request(need_resend, req); /* before link_request() */ 3167 3168 WARN_ON(req->r_osd); 3169 calc_target(osdc, &req->r_t, NULL, false); 3170 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3171 link_request(osd, req); 3172 if (!req->r_linger) { 3173 if (!osd_homeless(osd) && !req->r_t.paused) 3174 send_request(req); 3175 } else { 3176 cancel_linger_request(req); 3177 } 3178 } 3179 3180 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3181 if (!osd_homeless(lreq->osd)) 3182 send_linger(lreq); 3183 3184 list_del_init(&lreq->scan_item); 3185 } 3186 } 3187 3188 /* 3189 * Process updated osd map. 3190 * 3191 * The message contains any number of incremental and full maps, normally 3192 * indicating some sort of topology change in the cluster. Kick requests 3193 * off to different OSDs as needed. 3194 */ 3195 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3196 { 3197 void *p = msg->front.iov_base; 3198 void *const end = p + msg->front.iov_len; 3199 u32 nr_maps, maplen; 3200 u32 epoch; 3201 struct ceph_fsid fsid; 3202 struct rb_root need_resend = RB_ROOT; 3203 LIST_HEAD(need_resend_linger); 3204 bool handled_incremental = false; 3205 bool was_pauserd, was_pausewr; 3206 bool pauserd, pausewr; 3207 int err; 3208 3209 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3210 down_write(&osdc->lock); 3211 3212 /* verify fsid */ 3213 ceph_decode_need(&p, end, sizeof(fsid), bad); 3214 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3215 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3216 goto bad; 3217 3218 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3219 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3220 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3221 have_pool_full(osdc); 3222 3223 /* incremental maps */ 3224 ceph_decode_32_safe(&p, end, nr_maps, bad); 3225 dout(" %d inc maps\n", nr_maps); 3226 while (nr_maps > 0) { 3227 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3228 epoch = ceph_decode_32(&p); 3229 maplen = ceph_decode_32(&p); 3230 ceph_decode_need(&p, end, maplen, bad); 3231 if (osdc->osdmap->epoch && 3232 osdc->osdmap->epoch + 1 == epoch) { 3233 dout("applying incremental map %u len %d\n", 3234 epoch, maplen); 3235 err = handle_one_map(osdc, p, p + maplen, true, 3236 &need_resend, &need_resend_linger); 3237 if (err) 3238 goto bad; 3239 handled_incremental = true; 3240 } else { 3241 dout("ignoring incremental map %u len %d\n", 3242 epoch, maplen); 3243 } 3244 p += maplen; 3245 nr_maps--; 3246 } 3247 if (handled_incremental) 3248 goto done; 3249 3250 /* full maps */ 3251 ceph_decode_32_safe(&p, end, nr_maps, bad); 3252 dout(" %d full maps\n", nr_maps); 3253 while (nr_maps) { 3254 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3255 epoch = ceph_decode_32(&p); 3256 maplen = ceph_decode_32(&p); 3257 ceph_decode_need(&p, end, maplen, bad); 3258 if (nr_maps > 1) { 3259 dout("skipping non-latest full map %u len %d\n", 3260 epoch, maplen); 3261 } else if (osdc->osdmap->epoch >= epoch) { 3262 dout("skipping full map %u len %d, " 3263 "older than our %u\n", epoch, maplen, 3264 osdc->osdmap->epoch); 3265 } else { 3266 dout("taking full map %u len %d\n", epoch, maplen); 3267 err = handle_one_map(osdc, p, p + maplen, false, 3268 &need_resend, &need_resend_linger); 3269 if (err) 3270 goto bad; 3271 } 3272 p += maplen; 3273 nr_maps--; 3274 } 3275 3276 done: 3277 /* 3278 * subscribe to subsequent osdmap updates if full to ensure 3279 * we find out when we are no longer full and stop returning 3280 * ENOSPC. 3281 */ 3282 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3283 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3284 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3285 have_pool_full(osdc); 3286 if (was_pauserd || was_pausewr || pauserd || pausewr) 3287 maybe_request_map(osdc); 3288 3289 kick_requests(osdc, &need_resend, &need_resend_linger); 3290 3291 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 3292 osdc->osdmap->epoch); 3293 up_write(&osdc->lock); 3294 wake_up_all(&osdc->client->auth_wq); 3295 return; 3296 3297 bad: 3298 pr_err("osdc handle_map corrupt msg\n"); 3299 ceph_msg_dump(msg); 3300 up_write(&osdc->lock); 3301 } 3302 3303 /* 3304 * Resubmit requests pending on the given osd. 3305 */ 3306 static void kick_osd_requests(struct ceph_osd *osd) 3307 { 3308 struct rb_node *n; 3309 3310 for (n = rb_first(&osd->o_requests); n; ) { 3311 struct ceph_osd_request *req = 3312 rb_entry(n, struct ceph_osd_request, r_node); 3313 3314 n = rb_next(n); /* cancel_linger_request() */ 3315 3316 if (!req->r_linger) { 3317 if (!req->r_t.paused) 3318 send_request(req); 3319 } else { 3320 cancel_linger_request(req); 3321 } 3322 } 3323 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 3324 struct ceph_osd_linger_request *lreq = 3325 rb_entry(n, struct ceph_osd_linger_request, node); 3326 3327 send_linger(lreq); 3328 } 3329 } 3330 3331 /* 3332 * If the osd connection drops, we need to resubmit all requests. 3333 */ 3334 static void osd_fault(struct ceph_connection *con) 3335 { 3336 struct ceph_osd *osd = con->private; 3337 struct ceph_osd_client *osdc = osd->o_osdc; 3338 3339 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 3340 3341 down_write(&osdc->lock); 3342 if (!osd_registered(osd)) { 3343 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3344 goto out_unlock; 3345 } 3346 3347 if (!reopen_osd(osd)) 3348 kick_osd_requests(osd); 3349 maybe_request_map(osdc); 3350 3351 out_unlock: 3352 up_write(&osdc->lock); 3353 } 3354 3355 /* 3356 * Process osd watch notifications 3357 */ 3358 static void handle_watch_notify(struct ceph_osd_client *osdc, 3359 struct ceph_msg *msg) 3360 { 3361 void *p = msg->front.iov_base; 3362 void *const end = p + msg->front.iov_len; 3363 struct ceph_osd_linger_request *lreq; 3364 struct linger_work *lwork; 3365 u8 proto_ver, opcode; 3366 u64 cookie, notify_id; 3367 u64 notifier_id = 0; 3368 s32 return_code = 0; 3369 void *payload = NULL; 3370 u32 payload_len = 0; 3371 3372 ceph_decode_8_safe(&p, end, proto_ver, bad); 3373 ceph_decode_8_safe(&p, end, opcode, bad); 3374 ceph_decode_64_safe(&p, end, cookie, bad); 3375 p += 8; /* skip ver */ 3376 ceph_decode_64_safe(&p, end, notify_id, bad); 3377 3378 if (proto_ver >= 1) { 3379 ceph_decode_32_safe(&p, end, payload_len, bad); 3380 ceph_decode_need(&p, end, payload_len, bad); 3381 payload = p; 3382 p += payload_len; 3383 } 3384 3385 if (le16_to_cpu(msg->hdr.version) >= 2) 3386 ceph_decode_32_safe(&p, end, return_code, bad); 3387 3388 if (le16_to_cpu(msg->hdr.version) >= 3) 3389 ceph_decode_64_safe(&p, end, notifier_id, bad); 3390 3391 down_read(&osdc->lock); 3392 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 3393 if (!lreq) { 3394 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 3395 cookie); 3396 goto out_unlock_osdc; 3397 } 3398 3399 mutex_lock(&lreq->lock); 3400 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 3401 opcode, cookie, lreq, lreq->is_watch); 3402 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 3403 if (!lreq->last_error) { 3404 lreq->last_error = -ENOTCONN; 3405 queue_watch_error(lreq); 3406 } 3407 } else if (!lreq->is_watch) { 3408 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 3409 if (lreq->notify_id && lreq->notify_id != notify_id) { 3410 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 3411 lreq->notify_id, notify_id); 3412 } else if (!completion_done(&lreq->notify_finish_wait)) { 3413 struct ceph_msg_data *data = 3414 list_first_entry_or_null(&msg->data, 3415 struct ceph_msg_data, 3416 links); 3417 3418 if (data) { 3419 if (lreq->preply_pages) { 3420 WARN_ON(data->type != 3421 CEPH_MSG_DATA_PAGES); 3422 *lreq->preply_pages = data->pages; 3423 *lreq->preply_len = data->length; 3424 } else { 3425 ceph_release_page_vector(data->pages, 3426 calc_pages_for(0, data->length)); 3427 } 3428 } 3429 lreq->notify_finish_error = return_code; 3430 complete_all(&lreq->notify_finish_wait); 3431 } 3432 } else { 3433 /* CEPH_WATCH_EVENT_NOTIFY */ 3434 lwork = lwork_alloc(lreq, do_watch_notify); 3435 if (!lwork) { 3436 pr_err("failed to allocate notify-lwork\n"); 3437 goto out_unlock_lreq; 3438 } 3439 3440 lwork->notify.notify_id = notify_id; 3441 lwork->notify.notifier_id = notifier_id; 3442 lwork->notify.payload = payload; 3443 lwork->notify.payload_len = payload_len; 3444 lwork->notify.msg = ceph_msg_get(msg); 3445 lwork_queue(lwork); 3446 } 3447 3448 out_unlock_lreq: 3449 mutex_unlock(&lreq->lock); 3450 out_unlock_osdc: 3451 up_read(&osdc->lock); 3452 return; 3453 3454 bad: 3455 pr_err("osdc handle_watch_notify corrupt msg\n"); 3456 } 3457 3458 /* 3459 * Register request, send initial attempt. 3460 */ 3461 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 3462 struct ceph_osd_request *req, 3463 bool nofail) 3464 { 3465 down_read(&osdc->lock); 3466 submit_request(req, false); 3467 up_read(&osdc->lock); 3468 3469 return 0; 3470 } 3471 EXPORT_SYMBOL(ceph_osdc_start_request); 3472 3473 /* 3474 * Unregister a registered request. The request is not completed (i.e. 3475 * no callbacks or wakeups) - higher layers are supposed to know what 3476 * they are canceling. 3477 */ 3478 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 3479 { 3480 struct ceph_osd_client *osdc = req->r_osdc; 3481 3482 down_write(&osdc->lock); 3483 if (req->r_osd) 3484 cancel_request(req); 3485 up_write(&osdc->lock); 3486 } 3487 EXPORT_SYMBOL(ceph_osdc_cancel_request); 3488 3489 /* 3490 * @timeout: in jiffies, 0 means "wait forever" 3491 */ 3492 static int wait_request_timeout(struct ceph_osd_request *req, 3493 unsigned long timeout) 3494 { 3495 long left; 3496 3497 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3498 left = wait_for_completion_killable_timeout(&req->r_completion, 3499 ceph_timeout_jiffies(timeout)); 3500 if (left <= 0) { 3501 left = left ?: -ETIMEDOUT; 3502 ceph_osdc_cancel_request(req); 3503 3504 /* kludge - need to to wake ceph_osdc_sync() */ 3505 complete_all(&req->r_safe_completion); 3506 } else { 3507 left = req->r_result; /* completed */ 3508 } 3509 3510 return left; 3511 } 3512 3513 /* 3514 * wait for a request to complete 3515 */ 3516 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 3517 struct ceph_osd_request *req) 3518 { 3519 return wait_request_timeout(req, 0); 3520 } 3521 EXPORT_SYMBOL(ceph_osdc_wait_request); 3522 3523 /* 3524 * sync - wait for all in-flight requests to flush. avoid starvation. 3525 */ 3526 void ceph_osdc_sync(struct ceph_osd_client *osdc) 3527 { 3528 struct rb_node *n, *p; 3529 u64 last_tid = atomic64_read(&osdc->last_tid); 3530 3531 again: 3532 down_read(&osdc->lock); 3533 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3534 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3535 3536 mutex_lock(&osd->lock); 3537 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 3538 struct ceph_osd_request *req = 3539 rb_entry(p, struct ceph_osd_request, r_node); 3540 3541 if (req->r_tid > last_tid) 3542 break; 3543 3544 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 3545 continue; 3546 3547 ceph_osdc_get_request(req); 3548 mutex_unlock(&osd->lock); 3549 up_read(&osdc->lock); 3550 dout("%s waiting on req %p tid %llu last_tid %llu\n", 3551 __func__, req, req->r_tid, last_tid); 3552 wait_for_completion(&req->r_safe_completion); 3553 ceph_osdc_put_request(req); 3554 goto again; 3555 } 3556 3557 mutex_unlock(&osd->lock); 3558 } 3559 3560 up_read(&osdc->lock); 3561 dout("%s done last_tid %llu\n", __func__, last_tid); 3562 } 3563 EXPORT_SYMBOL(ceph_osdc_sync); 3564 3565 static struct ceph_osd_request * 3566 alloc_linger_request(struct ceph_osd_linger_request *lreq) 3567 { 3568 struct ceph_osd_request *req; 3569 3570 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 3571 if (!req) 3572 return NULL; 3573 3574 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3575 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3576 3577 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 3578 ceph_osdc_put_request(req); 3579 return NULL; 3580 } 3581 3582 return req; 3583 } 3584 3585 /* 3586 * Returns a handle, caller owns a ref. 3587 */ 3588 struct ceph_osd_linger_request * 3589 ceph_osdc_watch(struct ceph_osd_client *osdc, 3590 struct ceph_object_id *oid, 3591 struct ceph_object_locator *oloc, 3592 rados_watchcb2_t wcb, 3593 rados_watcherrcb_t errcb, 3594 void *data) 3595 { 3596 struct ceph_osd_linger_request *lreq; 3597 int ret; 3598 3599 lreq = linger_alloc(osdc); 3600 if (!lreq) 3601 return ERR_PTR(-ENOMEM); 3602 3603 lreq->is_watch = true; 3604 lreq->wcb = wcb; 3605 lreq->errcb = errcb; 3606 lreq->data = data; 3607 lreq->watch_valid_thru = jiffies; 3608 3609 ceph_oid_copy(&lreq->t.base_oid, oid); 3610 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3611 lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3612 lreq->mtime = CURRENT_TIME; 3613 3614 lreq->reg_req = alloc_linger_request(lreq); 3615 if (!lreq->reg_req) { 3616 ret = -ENOMEM; 3617 goto err_put_lreq; 3618 } 3619 3620 lreq->ping_req = alloc_linger_request(lreq); 3621 if (!lreq->ping_req) { 3622 ret = -ENOMEM; 3623 goto err_put_lreq; 3624 } 3625 3626 down_write(&osdc->lock); 3627 linger_register(lreq); /* before osd_req_op_* */ 3628 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id, 3629 CEPH_OSD_WATCH_OP_WATCH); 3630 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id, 3631 CEPH_OSD_WATCH_OP_PING); 3632 linger_submit(lreq); 3633 up_write(&osdc->lock); 3634 3635 ret = linger_reg_commit_wait(lreq); 3636 if (ret) { 3637 linger_cancel(lreq); 3638 goto err_put_lreq; 3639 } 3640 3641 return lreq; 3642 3643 err_put_lreq: 3644 linger_put(lreq); 3645 return ERR_PTR(ret); 3646 } 3647 EXPORT_SYMBOL(ceph_osdc_watch); 3648 3649 /* 3650 * Releases a ref. 3651 * 3652 * Times out after mount_timeout to preserve rbd unmap behaviour 3653 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 3654 * with mount_timeout"). 3655 */ 3656 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 3657 struct ceph_osd_linger_request *lreq) 3658 { 3659 struct ceph_options *opts = osdc->client->options; 3660 struct ceph_osd_request *req; 3661 int ret; 3662 3663 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3664 if (!req) 3665 return -ENOMEM; 3666 3667 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3668 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3669 req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3670 req->r_mtime = CURRENT_TIME; 3671 osd_req_op_watch_init(req, 0, lreq->linger_id, 3672 CEPH_OSD_WATCH_OP_UNWATCH); 3673 3674 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3675 if (ret) 3676 goto out_put_req; 3677 3678 ceph_osdc_start_request(osdc, req, false); 3679 linger_cancel(lreq); 3680 linger_put(lreq); 3681 ret = wait_request_timeout(req, opts->mount_timeout); 3682 3683 out_put_req: 3684 ceph_osdc_put_request(req); 3685 return ret; 3686 } 3687 EXPORT_SYMBOL(ceph_osdc_unwatch); 3688 3689 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 3690 u64 notify_id, u64 cookie, void *payload, 3691 size_t payload_len) 3692 { 3693 struct ceph_osd_req_op *op; 3694 struct ceph_pagelist *pl; 3695 int ret; 3696 3697 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 3698 3699 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3700 if (!pl) 3701 return -ENOMEM; 3702 3703 ceph_pagelist_init(pl); 3704 ret = ceph_pagelist_encode_64(pl, notify_id); 3705 ret |= ceph_pagelist_encode_64(pl, cookie); 3706 if (payload) { 3707 ret |= ceph_pagelist_encode_32(pl, payload_len); 3708 ret |= ceph_pagelist_append(pl, payload, payload_len); 3709 } else { 3710 ret |= ceph_pagelist_encode_32(pl, 0); 3711 } 3712 if (ret) { 3713 ceph_pagelist_release(pl); 3714 return -ENOMEM; 3715 } 3716 3717 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 3718 op->indata_len = pl->length; 3719 return 0; 3720 } 3721 3722 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 3723 struct ceph_object_id *oid, 3724 struct ceph_object_locator *oloc, 3725 u64 notify_id, 3726 u64 cookie, 3727 void *payload, 3728 size_t payload_len) 3729 { 3730 struct ceph_osd_request *req; 3731 int ret; 3732 3733 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3734 if (!req) 3735 return -ENOMEM; 3736 3737 ceph_oid_copy(&req->r_base_oid, oid); 3738 ceph_oloc_copy(&req->r_base_oloc, oloc); 3739 req->r_flags = CEPH_OSD_FLAG_READ; 3740 3741 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3742 if (ret) 3743 goto out_put_req; 3744 3745 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 3746 payload_len); 3747 if (ret) 3748 goto out_put_req; 3749 3750 ceph_osdc_start_request(osdc, req, false); 3751 ret = ceph_osdc_wait_request(osdc, req); 3752 3753 out_put_req: 3754 ceph_osdc_put_request(req); 3755 return ret; 3756 } 3757 EXPORT_SYMBOL(ceph_osdc_notify_ack); 3758 3759 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 3760 u64 cookie, u32 prot_ver, u32 timeout, 3761 void *payload, size_t payload_len) 3762 { 3763 struct ceph_osd_req_op *op; 3764 struct ceph_pagelist *pl; 3765 int ret; 3766 3767 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 3768 op->notify.cookie = cookie; 3769 3770 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3771 if (!pl) 3772 return -ENOMEM; 3773 3774 ceph_pagelist_init(pl); 3775 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 3776 ret |= ceph_pagelist_encode_32(pl, timeout); 3777 ret |= ceph_pagelist_encode_32(pl, payload_len); 3778 ret |= ceph_pagelist_append(pl, payload, payload_len); 3779 if (ret) { 3780 ceph_pagelist_release(pl); 3781 return -ENOMEM; 3782 } 3783 3784 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 3785 op->indata_len = pl->length; 3786 return 0; 3787 } 3788 3789 /* 3790 * @timeout: in seconds 3791 * 3792 * @preply_{pages,len} are initialized both on success and error. 3793 * The caller is responsible for: 3794 * 3795 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 3796 */ 3797 int ceph_osdc_notify(struct ceph_osd_client *osdc, 3798 struct ceph_object_id *oid, 3799 struct ceph_object_locator *oloc, 3800 void *payload, 3801 size_t payload_len, 3802 u32 timeout, 3803 struct page ***preply_pages, 3804 size_t *preply_len) 3805 { 3806 struct ceph_osd_linger_request *lreq; 3807 struct page **pages; 3808 int ret; 3809 3810 WARN_ON(!timeout); 3811 if (preply_pages) { 3812 *preply_pages = NULL; 3813 *preply_len = 0; 3814 } 3815 3816 lreq = linger_alloc(osdc); 3817 if (!lreq) 3818 return -ENOMEM; 3819 3820 lreq->preply_pages = preply_pages; 3821 lreq->preply_len = preply_len; 3822 3823 ceph_oid_copy(&lreq->t.base_oid, oid); 3824 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3825 lreq->t.flags = CEPH_OSD_FLAG_READ; 3826 3827 lreq->reg_req = alloc_linger_request(lreq); 3828 if (!lreq->reg_req) { 3829 ret = -ENOMEM; 3830 goto out_put_lreq; 3831 } 3832 3833 /* for notify_id */ 3834 pages = ceph_alloc_page_vector(1, GFP_NOIO); 3835 if (IS_ERR(pages)) { 3836 ret = PTR_ERR(pages); 3837 goto out_put_lreq; 3838 } 3839 3840 down_write(&osdc->lock); 3841 linger_register(lreq); /* before osd_req_op_* */ 3842 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1, 3843 timeout, payload, payload_len); 3844 if (ret) { 3845 linger_unregister(lreq); 3846 up_write(&osdc->lock); 3847 ceph_release_page_vector(pages, 1); 3848 goto out_put_lreq; 3849 } 3850 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 3851 response_data), 3852 pages, PAGE_SIZE, 0, false, true); 3853 linger_submit(lreq); 3854 up_write(&osdc->lock); 3855 3856 ret = linger_reg_commit_wait(lreq); 3857 if (!ret) 3858 ret = linger_notify_finish_wait(lreq); 3859 else 3860 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 3861 3862 linger_cancel(lreq); 3863 out_put_lreq: 3864 linger_put(lreq); 3865 return ret; 3866 } 3867 EXPORT_SYMBOL(ceph_osdc_notify); 3868 3869 /* 3870 * Return the number of milliseconds since the watch was last 3871 * confirmed, or an error. If there is an error, the watch is no 3872 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 3873 */ 3874 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 3875 struct ceph_osd_linger_request *lreq) 3876 { 3877 unsigned long stamp, age; 3878 int ret; 3879 3880 down_read(&osdc->lock); 3881 mutex_lock(&lreq->lock); 3882 stamp = lreq->watch_valid_thru; 3883 if (!list_empty(&lreq->pending_lworks)) { 3884 struct linger_work *lwork = 3885 list_first_entry(&lreq->pending_lworks, 3886 struct linger_work, 3887 pending_item); 3888 3889 if (time_before(lwork->queued_stamp, stamp)) 3890 stamp = lwork->queued_stamp; 3891 } 3892 age = jiffies - stamp; 3893 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 3894 lreq, lreq->linger_id, age, lreq->last_error); 3895 /* we are truncating to msecs, so return a safe upper bound */ 3896 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 3897 3898 mutex_unlock(&lreq->lock); 3899 up_read(&osdc->lock); 3900 return ret; 3901 } 3902 3903 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 3904 { 3905 u8 struct_v; 3906 u32 struct_len; 3907 int ret; 3908 3909 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 3910 &struct_v, &struct_len); 3911 if (ret) 3912 return ret; 3913 3914 ceph_decode_copy(p, &item->name, sizeof(item->name)); 3915 item->cookie = ceph_decode_64(p); 3916 *p += 4; /* skip timeout_seconds */ 3917 if (struct_v >= 2) { 3918 ceph_decode_copy(p, &item->addr, sizeof(item->addr)); 3919 ceph_decode_addr(&item->addr); 3920 } 3921 3922 dout("%s %s%llu cookie %llu addr %s\n", __func__, 3923 ENTITY_NAME(item->name), item->cookie, 3924 ceph_pr_addr(&item->addr.in_addr)); 3925 return 0; 3926 } 3927 3928 static int decode_watchers(void **p, void *end, 3929 struct ceph_watch_item **watchers, 3930 u32 *num_watchers) 3931 { 3932 u8 struct_v; 3933 u32 struct_len; 3934 int i; 3935 int ret; 3936 3937 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 3938 &struct_v, &struct_len); 3939 if (ret) 3940 return ret; 3941 3942 *num_watchers = ceph_decode_32(p); 3943 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 3944 if (!*watchers) 3945 return -ENOMEM; 3946 3947 for (i = 0; i < *num_watchers; i++) { 3948 ret = decode_watcher(p, end, *watchers + i); 3949 if (ret) { 3950 kfree(*watchers); 3951 return ret; 3952 } 3953 } 3954 3955 return 0; 3956 } 3957 3958 /* 3959 * On success, the caller is responsible for: 3960 * 3961 * kfree(watchers); 3962 */ 3963 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 3964 struct ceph_object_id *oid, 3965 struct ceph_object_locator *oloc, 3966 struct ceph_watch_item **watchers, 3967 u32 *num_watchers) 3968 { 3969 struct ceph_osd_request *req; 3970 struct page **pages; 3971 int ret; 3972 3973 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3974 if (!req) 3975 return -ENOMEM; 3976 3977 ceph_oid_copy(&req->r_base_oid, oid); 3978 ceph_oloc_copy(&req->r_base_oloc, oloc); 3979 req->r_flags = CEPH_OSD_FLAG_READ; 3980 3981 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3982 if (ret) 3983 goto out_put_req; 3984 3985 pages = ceph_alloc_page_vector(1, GFP_NOIO); 3986 if (IS_ERR(pages)) { 3987 ret = PTR_ERR(pages); 3988 goto out_put_req; 3989 } 3990 3991 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 3992 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 3993 response_data), 3994 pages, PAGE_SIZE, 0, false, true); 3995 3996 ceph_osdc_start_request(osdc, req, false); 3997 ret = ceph_osdc_wait_request(osdc, req); 3998 if (ret >= 0) { 3999 void *p = page_address(pages[0]); 4000 void *const end = p + req->r_ops[0].outdata_len; 4001 4002 ret = decode_watchers(&p, end, watchers, num_watchers); 4003 } 4004 4005 out_put_req: 4006 ceph_osdc_put_request(req); 4007 return ret; 4008 } 4009 EXPORT_SYMBOL(ceph_osdc_list_watchers); 4010 4011 /* 4012 * Call all pending notify callbacks - for use after a watch is 4013 * unregistered, to make sure no more callbacks for it will be invoked 4014 */ 4015 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 4016 { 4017 dout("%s osdc %p\n", __func__, osdc); 4018 flush_workqueue(osdc->notify_wq); 4019 } 4020 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 4021 4022 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 4023 { 4024 down_read(&osdc->lock); 4025 maybe_request_map(osdc); 4026 up_read(&osdc->lock); 4027 } 4028 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 4029 4030 /* 4031 * Execute an OSD class method on an object. 4032 * 4033 * @flags: CEPH_OSD_FLAG_* 4034 * @resp_len: out param for reply length 4035 */ 4036 int ceph_osdc_call(struct ceph_osd_client *osdc, 4037 struct ceph_object_id *oid, 4038 struct ceph_object_locator *oloc, 4039 const char *class, const char *method, 4040 unsigned int flags, 4041 struct page *req_page, size_t req_len, 4042 struct page *resp_page, size_t *resp_len) 4043 { 4044 struct ceph_osd_request *req; 4045 int ret; 4046 4047 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4048 if (!req) 4049 return -ENOMEM; 4050 4051 ceph_oid_copy(&req->r_base_oid, oid); 4052 ceph_oloc_copy(&req->r_base_oloc, oloc); 4053 req->r_flags = flags; 4054 4055 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4056 if (ret) 4057 goto out_put_req; 4058 4059 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method); 4060 if (req_page) 4061 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 4062 0, false, false); 4063 if (resp_page) 4064 osd_req_op_cls_response_data_pages(req, 0, &resp_page, 4065 PAGE_SIZE, 0, false, false); 4066 4067 ceph_osdc_start_request(osdc, req, false); 4068 ret = ceph_osdc_wait_request(osdc, req); 4069 if (ret >= 0) { 4070 ret = req->r_ops[0].rval; 4071 if (resp_page) 4072 *resp_len = req->r_ops[0].outdata_len; 4073 } 4074 4075 out_put_req: 4076 ceph_osdc_put_request(req); 4077 return ret; 4078 } 4079 EXPORT_SYMBOL(ceph_osdc_call); 4080 4081 /* 4082 * init, shutdown 4083 */ 4084 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 4085 { 4086 int err; 4087 4088 dout("init\n"); 4089 osdc->client = client; 4090 init_rwsem(&osdc->lock); 4091 osdc->osds = RB_ROOT; 4092 INIT_LIST_HEAD(&osdc->osd_lru); 4093 spin_lock_init(&osdc->osd_lru_lock); 4094 osd_init(&osdc->homeless_osd); 4095 osdc->homeless_osd.o_osdc = osdc; 4096 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 4097 osdc->linger_requests = RB_ROOT; 4098 osdc->map_checks = RB_ROOT; 4099 osdc->linger_map_checks = RB_ROOT; 4100 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 4101 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 4102 4103 err = -ENOMEM; 4104 osdc->osdmap = ceph_osdmap_alloc(); 4105 if (!osdc->osdmap) 4106 goto out; 4107 4108 osdc->req_mempool = mempool_create_slab_pool(10, 4109 ceph_osd_request_cache); 4110 if (!osdc->req_mempool) 4111 goto out_map; 4112 4113 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 4114 PAGE_SIZE, 10, true, "osd_op"); 4115 if (err < 0) 4116 goto out_mempool; 4117 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 4118 PAGE_SIZE, 10, true, "osd_op_reply"); 4119 if (err < 0) 4120 goto out_msgpool; 4121 4122 err = -ENOMEM; 4123 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 4124 if (!osdc->notify_wq) 4125 goto out_msgpool_reply; 4126 4127 schedule_delayed_work(&osdc->timeout_work, 4128 osdc->client->options->osd_keepalive_timeout); 4129 schedule_delayed_work(&osdc->osds_timeout_work, 4130 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 4131 4132 return 0; 4133 4134 out_msgpool_reply: 4135 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4136 out_msgpool: 4137 ceph_msgpool_destroy(&osdc->msgpool_op); 4138 out_mempool: 4139 mempool_destroy(osdc->req_mempool); 4140 out_map: 4141 ceph_osdmap_destroy(osdc->osdmap); 4142 out: 4143 return err; 4144 } 4145 4146 void ceph_osdc_stop(struct ceph_osd_client *osdc) 4147 { 4148 flush_workqueue(osdc->notify_wq); 4149 destroy_workqueue(osdc->notify_wq); 4150 cancel_delayed_work_sync(&osdc->timeout_work); 4151 cancel_delayed_work_sync(&osdc->osds_timeout_work); 4152 4153 down_write(&osdc->lock); 4154 while (!RB_EMPTY_ROOT(&osdc->osds)) { 4155 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 4156 struct ceph_osd, o_node); 4157 close_osd(osd); 4158 } 4159 up_write(&osdc->lock); 4160 WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1); 4161 osd_cleanup(&osdc->homeless_osd); 4162 4163 WARN_ON(!list_empty(&osdc->osd_lru)); 4164 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 4165 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 4166 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 4167 WARN_ON(atomic_read(&osdc->num_requests)); 4168 WARN_ON(atomic_read(&osdc->num_homeless)); 4169 4170 ceph_osdmap_destroy(osdc->osdmap); 4171 mempool_destroy(osdc->req_mempool); 4172 ceph_msgpool_destroy(&osdc->msgpool_op); 4173 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4174 } 4175 4176 /* 4177 * Read some contiguous pages. If we cross a stripe boundary, shorten 4178 * *plen. Return number of bytes read, or error. 4179 */ 4180 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 4181 struct ceph_vino vino, struct ceph_file_layout *layout, 4182 u64 off, u64 *plen, 4183 u32 truncate_seq, u64 truncate_size, 4184 struct page **pages, int num_pages, int page_align) 4185 { 4186 struct ceph_osd_request *req; 4187 int rc = 0; 4188 4189 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 4190 vino.snap, off, *plen); 4191 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 4192 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 4193 NULL, truncate_seq, truncate_size, 4194 false); 4195 if (IS_ERR(req)) 4196 return PTR_ERR(req); 4197 4198 /* it may be a short read due to an object boundary */ 4199 osd_req_op_extent_osd_data_pages(req, 0, 4200 pages, *plen, page_align, false, false); 4201 4202 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 4203 off, *plen, *plen, page_align); 4204 4205 rc = ceph_osdc_start_request(osdc, req, false); 4206 if (!rc) 4207 rc = ceph_osdc_wait_request(osdc, req); 4208 4209 ceph_osdc_put_request(req); 4210 dout("readpages result %d\n", rc); 4211 return rc; 4212 } 4213 EXPORT_SYMBOL(ceph_osdc_readpages); 4214 4215 /* 4216 * do a synchronous write on N pages 4217 */ 4218 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 4219 struct ceph_file_layout *layout, 4220 struct ceph_snap_context *snapc, 4221 u64 off, u64 len, 4222 u32 truncate_seq, u64 truncate_size, 4223 struct timespec *mtime, 4224 struct page **pages, int num_pages) 4225 { 4226 struct ceph_osd_request *req; 4227 int rc = 0; 4228 int page_align = off & ~PAGE_MASK; 4229 4230 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 4231 CEPH_OSD_OP_WRITE, 4232 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 4233 snapc, truncate_seq, truncate_size, 4234 true); 4235 if (IS_ERR(req)) 4236 return PTR_ERR(req); 4237 4238 /* it may be a short write due to an object boundary */ 4239 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 4240 false, false); 4241 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 4242 4243 req->r_mtime = *mtime; 4244 rc = ceph_osdc_start_request(osdc, req, true); 4245 if (!rc) 4246 rc = ceph_osdc_wait_request(osdc, req); 4247 4248 ceph_osdc_put_request(req); 4249 if (rc == 0) 4250 rc = len; 4251 dout("writepages result %d\n", rc); 4252 return rc; 4253 } 4254 EXPORT_SYMBOL(ceph_osdc_writepages); 4255 4256 int ceph_osdc_setup(void) 4257 { 4258 size_t size = sizeof(struct ceph_osd_request) + 4259 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 4260 4261 BUG_ON(ceph_osd_request_cache); 4262 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 4263 0, 0, NULL); 4264 4265 return ceph_osd_request_cache ? 0 : -ENOMEM; 4266 } 4267 EXPORT_SYMBOL(ceph_osdc_setup); 4268 4269 void ceph_osdc_cleanup(void) 4270 { 4271 BUG_ON(!ceph_osd_request_cache); 4272 kmem_cache_destroy(ceph_osd_request_cache); 4273 ceph_osd_request_cache = NULL; 4274 } 4275 EXPORT_SYMBOL(ceph_osdc_cleanup); 4276 4277 /* 4278 * handle incoming message 4279 */ 4280 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 4281 { 4282 struct ceph_osd *osd = con->private; 4283 struct ceph_osd_client *osdc = osd->o_osdc; 4284 int type = le16_to_cpu(msg->hdr.type); 4285 4286 switch (type) { 4287 case CEPH_MSG_OSD_MAP: 4288 ceph_osdc_handle_map(osdc, msg); 4289 break; 4290 case CEPH_MSG_OSD_OPREPLY: 4291 handle_reply(osd, msg); 4292 break; 4293 case CEPH_MSG_WATCH_NOTIFY: 4294 handle_watch_notify(osdc, msg); 4295 break; 4296 4297 default: 4298 pr_err("received unknown message type %d %s\n", type, 4299 ceph_msg_type_name(type)); 4300 } 4301 4302 ceph_msg_put(msg); 4303 } 4304 4305 /* 4306 * Lookup and return message for incoming reply. Don't try to do 4307 * anything about a larger than preallocated data portion of the 4308 * message at the moment - for now, just skip the message. 4309 */ 4310 static struct ceph_msg *get_reply(struct ceph_connection *con, 4311 struct ceph_msg_header *hdr, 4312 int *skip) 4313 { 4314 struct ceph_osd *osd = con->private; 4315 struct ceph_osd_client *osdc = osd->o_osdc; 4316 struct ceph_msg *m = NULL; 4317 struct ceph_osd_request *req; 4318 int front_len = le32_to_cpu(hdr->front_len); 4319 int data_len = le32_to_cpu(hdr->data_len); 4320 u64 tid = le64_to_cpu(hdr->tid); 4321 4322 down_read(&osdc->lock); 4323 if (!osd_registered(osd)) { 4324 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 4325 *skip = 1; 4326 goto out_unlock_osdc; 4327 } 4328 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 4329 4330 mutex_lock(&osd->lock); 4331 req = lookup_request(&osd->o_requests, tid); 4332 if (!req) { 4333 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 4334 osd->o_osd, tid); 4335 *skip = 1; 4336 goto out_unlock_session; 4337 } 4338 4339 ceph_msg_revoke_incoming(req->r_reply); 4340 4341 if (front_len > req->r_reply->front_alloc_len) { 4342 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 4343 __func__, osd->o_osd, req->r_tid, front_len, 4344 req->r_reply->front_alloc_len); 4345 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 4346 false); 4347 if (!m) 4348 goto out_unlock_session; 4349 ceph_msg_put(req->r_reply); 4350 req->r_reply = m; 4351 } 4352 4353 if (data_len > req->r_reply->data_length) { 4354 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 4355 __func__, osd->o_osd, req->r_tid, data_len, 4356 req->r_reply->data_length); 4357 m = NULL; 4358 *skip = 1; 4359 goto out_unlock_session; 4360 } 4361 4362 m = ceph_msg_get(req->r_reply); 4363 dout("get_reply tid %lld %p\n", tid, m); 4364 4365 out_unlock_session: 4366 mutex_unlock(&osd->lock); 4367 out_unlock_osdc: 4368 up_read(&osdc->lock); 4369 return m; 4370 } 4371 4372 /* 4373 * TODO: switch to a msg-owned pagelist 4374 */ 4375 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 4376 { 4377 struct ceph_msg *m; 4378 int type = le16_to_cpu(hdr->type); 4379 u32 front_len = le32_to_cpu(hdr->front_len); 4380 u32 data_len = le32_to_cpu(hdr->data_len); 4381 4382 m = ceph_msg_new(type, front_len, GFP_NOIO, false); 4383 if (!m) 4384 return NULL; 4385 4386 if (data_len) { 4387 struct page **pages; 4388 struct ceph_osd_data osd_data; 4389 4390 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 4391 GFP_NOIO); 4392 if (IS_ERR(pages)) { 4393 ceph_msg_put(m); 4394 return NULL; 4395 } 4396 4397 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false, 4398 false); 4399 ceph_osdc_msg_data_add(m, &osd_data); 4400 } 4401 4402 return m; 4403 } 4404 4405 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 4406 struct ceph_msg_header *hdr, 4407 int *skip) 4408 { 4409 struct ceph_osd *osd = con->private; 4410 int type = le16_to_cpu(hdr->type); 4411 4412 *skip = 0; 4413 switch (type) { 4414 case CEPH_MSG_OSD_MAP: 4415 case CEPH_MSG_WATCH_NOTIFY: 4416 return alloc_msg_with_page_vector(hdr); 4417 case CEPH_MSG_OSD_OPREPLY: 4418 return get_reply(con, hdr, skip); 4419 default: 4420 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 4421 osd->o_osd, type); 4422 *skip = 1; 4423 return NULL; 4424 } 4425 } 4426 4427 /* 4428 * Wrappers to refcount containing ceph_osd struct 4429 */ 4430 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 4431 { 4432 struct ceph_osd *osd = con->private; 4433 if (get_osd(osd)) 4434 return con; 4435 return NULL; 4436 } 4437 4438 static void put_osd_con(struct ceph_connection *con) 4439 { 4440 struct ceph_osd *osd = con->private; 4441 put_osd(osd); 4442 } 4443 4444 /* 4445 * authentication 4446 */ 4447 /* 4448 * Note: returned pointer is the address of a structure that's 4449 * managed separately. Caller must *not* attempt to free it. 4450 */ 4451 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 4452 int *proto, int force_new) 4453 { 4454 struct ceph_osd *o = con->private; 4455 struct ceph_osd_client *osdc = o->o_osdc; 4456 struct ceph_auth_client *ac = osdc->client->monc.auth; 4457 struct ceph_auth_handshake *auth = &o->o_auth; 4458 4459 if (force_new && auth->authorizer) { 4460 ceph_auth_destroy_authorizer(auth->authorizer); 4461 auth->authorizer = NULL; 4462 } 4463 if (!auth->authorizer) { 4464 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4465 auth); 4466 if (ret) 4467 return ERR_PTR(ret); 4468 } else { 4469 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4470 auth); 4471 if (ret) 4472 return ERR_PTR(ret); 4473 } 4474 *proto = ac->protocol; 4475 4476 return auth; 4477 } 4478 4479 4480 static int verify_authorizer_reply(struct ceph_connection *con, int len) 4481 { 4482 struct ceph_osd *o = con->private; 4483 struct ceph_osd_client *osdc = o->o_osdc; 4484 struct ceph_auth_client *ac = osdc->client->monc.auth; 4485 4486 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); 4487 } 4488 4489 static int invalidate_authorizer(struct ceph_connection *con) 4490 { 4491 struct ceph_osd *o = con->private; 4492 struct ceph_osd_client *osdc = o->o_osdc; 4493 struct ceph_auth_client *ac = osdc->client->monc.auth; 4494 4495 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 4496 return ceph_monc_validate_auth(&osdc->client->monc); 4497 } 4498 4499 static int osd_sign_message(struct ceph_msg *msg) 4500 { 4501 struct ceph_osd *o = msg->con->private; 4502 struct ceph_auth_handshake *auth = &o->o_auth; 4503 4504 return ceph_auth_sign_message(auth, msg); 4505 } 4506 4507 static int osd_check_message_signature(struct ceph_msg *msg) 4508 { 4509 struct ceph_osd *o = msg->con->private; 4510 struct ceph_auth_handshake *auth = &o->o_auth; 4511 4512 return ceph_auth_check_message_signature(auth, msg); 4513 } 4514 4515 static const struct ceph_connection_operations osd_con_ops = { 4516 .get = get_osd_con, 4517 .put = put_osd_con, 4518 .dispatch = dispatch, 4519 .get_authorizer = get_authorizer, 4520 .verify_authorizer_reply = verify_authorizer_reply, 4521 .invalidate_authorizer = invalidate_authorizer, 4522 .alloc_msg = alloc_msg, 4523 .sign_message = osd_sign_message, 4524 .check_message_signature = osd_check_message_signature, 4525 .fault = osd_fault, 4526 }; 4527