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_done_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 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 676 op->indata_len -= previous - length; 677 } 678 EXPORT_SYMBOL(osd_req_op_extent_update); 679 680 void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 681 unsigned int which, u64 offset_inc) 682 { 683 struct ceph_osd_req_op *op, *prev_op; 684 685 BUG_ON(which + 1 >= osd_req->r_num_ops); 686 687 prev_op = &osd_req->r_ops[which]; 688 op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); 689 /* dup previous one */ 690 op->indata_len = prev_op->indata_len; 691 op->outdata_len = prev_op->outdata_len; 692 op->extent = prev_op->extent; 693 /* adjust offset */ 694 op->extent.offset += offset_inc; 695 op->extent.length -= offset_inc; 696 697 if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) 698 op->indata_len -= offset_inc; 699 } 700 EXPORT_SYMBOL(osd_req_op_extent_dup_last); 701 702 void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 703 u16 opcode, const char *class, const char *method) 704 { 705 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 706 opcode, 0); 707 struct ceph_pagelist *pagelist; 708 size_t payload_len = 0; 709 size_t size; 710 711 BUG_ON(opcode != CEPH_OSD_OP_CALL); 712 713 pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); 714 BUG_ON(!pagelist); 715 ceph_pagelist_init(pagelist); 716 717 op->cls.class_name = class; 718 size = strlen(class); 719 BUG_ON(size > (size_t) U8_MAX); 720 op->cls.class_len = size; 721 ceph_pagelist_append(pagelist, class, size); 722 payload_len += size; 723 724 op->cls.method_name = method; 725 size = strlen(method); 726 BUG_ON(size > (size_t) U8_MAX); 727 op->cls.method_len = size; 728 ceph_pagelist_append(pagelist, method, size); 729 payload_len += size; 730 731 osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); 732 733 op->indata_len = payload_len; 734 } 735 EXPORT_SYMBOL(osd_req_op_cls_init); 736 737 int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 738 u16 opcode, const char *name, const void *value, 739 size_t size, u8 cmp_op, u8 cmp_mode) 740 { 741 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 742 opcode, 0); 743 struct ceph_pagelist *pagelist; 744 size_t payload_len; 745 746 BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); 747 748 pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); 749 if (!pagelist) 750 return -ENOMEM; 751 752 ceph_pagelist_init(pagelist); 753 754 payload_len = strlen(name); 755 op->xattr.name_len = payload_len; 756 ceph_pagelist_append(pagelist, name, payload_len); 757 758 op->xattr.value_len = size; 759 ceph_pagelist_append(pagelist, value, size); 760 payload_len += size; 761 762 op->xattr.cmp_op = cmp_op; 763 op->xattr.cmp_mode = cmp_mode; 764 765 ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); 766 op->indata_len = payload_len; 767 return 0; 768 } 769 EXPORT_SYMBOL(osd_req_op_xattr_init); 770 771 /* 772 * @watch_opcode: CEPH_OSD_WATCH_OP_* 773 */ 774 static void osd_req_op_watch_init(struct ceph_osd_request *req, int which, 775 u64 cookie, u8 watch_opcode) 776 { 777 struct ceph_osd_req_op *op; 778 779 op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0); 780 op->watch.cookie = cookie; 781 op->watch.op = watch_opcode; 782 op->watch.gen = 0; 783 } 784 785 void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 786 unsigned int which, 787 u64 expected_object_size, 788 u64 expected_write_size) 789 { 790 struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, 791 CEPH_OSD_OP_SETALLOCHINT, 792 0); 793 794 op->alloc_hint.expected_object_size = expected_object_size; 795 op->alloc_hint.expected_write_size = expected_write_size; 796 797 /* 798 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed 799 * not worth a feature bit. Set FAILOK per-op flag to make 800 * sure older osds don't trip over an unsupported opcode. 801 */ 802 op->flags |= CEPH_OSD_OP_FLAG_FAILOK; 803 } 804 EXPORT_SYMBOL(osd_req_op_alloc_hint_init); 805 806 static void ceph_osdc_msg_data_add(struct ceph_msg *msg, 807 struct ceph_osd_data *osd_data) 808 { 809 u64 length = ceph_osd_data_length(osd_data); 810 811 if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { 812 BUG_ON(length > (u64) SIZE_MAX); 813 if (length) 814 ceph_msg_data_add_pages(msg, osd_data->pages, 815 length, osd_data->alignment); 816 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { 817 BUG_ON(!length); 818 ceph_msg_data_add_pagelist(msg, osd_data->pagelist); 819 #ifdef CONFIG_BLOCK 820 } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { 821 ceph_msg_data_add_bio(msg, osd_data->bio, length); 822 #endif 823 } else { 824 BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); 825 } 826 } 827 828 static u32 osd_req_encode_op(struct ceph_osd_op *dst, 829 const struct ceph_osd_req_op *src) 830 { 831 if (WARN_ON(!osd_req_opcode_valid(src->op))) { 832 pr_err("unrecognized osd opcode %d\n", src->op); 833 834 return 0; 835 } 836 837 switch (src->op) { 838 case CEPH_OSD_OP_STAT: 839 break; 840 case CEPH_OSD_OP_READ: 841 case CEPH_OSD_OP_WRITE: 842 case CEPH_OSD_OP_WRITEFULL: 843 case CEPH_OSD_OP_ZERO: 844 case CEPH_OSD_OP_TRUNCATE: 845 dst->extent.offset = cpu_to_le64(src->extent.offset); 846 dst->extent.length = cpu_to_le64(src->extent.length); 847 dst->extent.truncate_size = 848 cpu_to_le64(src->extent.truncate_size); 849 dst->extent.truncate_seq = 850 cpu_to_le32(src->extent.truncate_seq); 851 break; 852 case CEPH_OSD_OP_CALL: 853 dst->cls.class_len = src->cls.class_len; 854 dst->cls.method_len = src->cls.method_len; 855 dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); 856 break; 857 case CEPH_OSD_OP_STARTSYNC: 858 break; 859 case CEPH_OSD_OP_WATCH: 860 dst->watch.cookie = cpu_to_le64(src->watch.cookie); 861 dst->watch.ver = cpu_to_le64(0); 862 dst->watch.op = src->watch.op; 863 dst->watch.gen = cpu_to_le32(src->watch.gen); 864 break; 865 case CEPH_OSD_OP_NOTIFY_ACK: 866 break; 867 case CEPH_OSD_OP_NOTIFY: 868 dst->notify.cookie = cpu_to_le64(src->notify.cookie); 869 break; 870 case CEPH_OSD_OP_LIST_WATCHERS: 871 break; 872 case CEPH_OSD_OP_SETALLOCHINT: 873 dst->alloc_hint.expected_object_size = 874 cpu_to_le64(src->alloc_hint.expected_object_size); 875 dst->alloc_hint.expected_write_size = 876 cpu_to_le64(src->alloc_hint.expected_write_size); 877 break; 878 case CEPH_OSD_OP_SETXATTR: 879 case CEPH_OSD_OP_CMPXATTR: 880 dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); 881 dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); 882 dst->xattr.cmp_op = src->xattr.cmp_op; 883 dst->xattr.cmp_mode = src->xattr.cmp_mode; 884 break; 885 case CEPH_OSD_OP_CREATE: 886 case CEPH_OSD_OP_DELETE: 887 break; 888 default: 889 pr_err("unsupported osd opcode %s\n", 890 ceph_osd_op_name(src->op)); 891 WARN_ON(1); 892 893 return 0; 894 } 895 896 dst->op = cpu_to_le16(src->op); 897 dst->flags = cpu_to_le32(src->flags); 898 dst->payload_len = cpu_to_le32(src->indata_len); 899 900 return src->indata_len; 901 } 902 903 /* 904 * build new request AND message, calculate layout, and adjust file 905 * extent as needed. 906 * 907 * if the file was recently truncated, we include information about its 908 * old and new size so that the object can be updated appropriately. (we 909 * avoid synchronously deleting truncated objects because it's slow.) 910 * 911 * if @do_sync, include a 'startsync' command so that the osd will flush 912 * data quickly. 913 */ 914 struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, 915 struct ceph_file_layout *layout, 916 struct ceph_vino vino, 917 u64 off, u64 *plen, 918 unsigned int which, int num_ops, 919 int opcode, int flags, 920 struct ceph_snap_context *snapc, 921 u32 truncate_seq, 922 u64 truncate_size, 923 bool use_mempool) 924 { 925 struct ceph_osd_request *req; 926 u64 objnum = 0; 927 u64 objoff = 0; 928 u64 objlen = 0; 929 int r; 930 931 BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && 932 opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && 933 opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); 934 935 req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, 936 GFP_NOFS); 937 if (!req) { 938 r = -ENOMEM; 939 goto fail; 940 } 941 942 /* calculate max write size */ 943 r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); 944 if (r) 945 goto fail; 946 947 if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { 948 osd_req_op_init(req, which, opcode, 0); 949 } else { 950 u32 object_size = layout->object_size; 951 u32 object_base = off - objoff; 952 if (!(truncate_seq == 1 && truncate_size == -1ULL)) { 953 if (truncate_size <= object_base) { 954 truncate_size = 0; 955 } else { 956 truncate_size -= object_base; 957 if (truncate_size > object_size) 958 truncate_size = object_size; 959 } 960 } 961 osd_req_op_extent_init(req, which, opcode, objoff, objlen, 962 truncate_size, truncate_seq); 963 } 964 965 req->r_flags = flags; 966 req->r_base_oloc.pool = layout->pool_id; 967 req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns); 968 ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); 969 970 req->r_snapid = vino.snap; 971 if (flags & CEPH_OSD_FLAG_WRITE) 972 req->r_data_offset = off; 973 974 r = ceph_osdc_alloc_messages(req, GFP_NOFS); 975 if (r) 976 goto fail; 977 978 return req; 979 980 fail: 981 ceph_osdc_put_request(req); 982 return ERR_PTR(r); 983 } 984 EXPORT_SYMBOL(ceph_osdc_new_request); 985 986 /* 987 * We keep osd requests in an rbtree, sorted by ->r_tid. 988 */ 989 DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) 990 DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node) 991 992 static bool osd_homeless(struct ceph_osd *osd) 993 { 994 return osd->o_osd == CEPH_HOMELESS_OSD; 995 } 996 997 static bool osd_registered(struct ceph_osd *osd) 998 { 999 verify_osdc_locked(osd->o_osdc); 1000 1001 return !RB_EMPTY_NODE(&osd->o_node); 1002 } 1003 1004 /* 1005 * Assumes @osd is zero-initialized. 1006 */ 1007 static void osd_init(struct ceph_osd *osd) 1008 { 1009 atomic_set(&osd->o_ref, 1); 1010 RB_CLEAR_NODE(&osd->o_node); 1011 osd->o_requests = RB_ROOT; 1012 osd->o_linger_requests = RB_ROOT; 1013 INIT_LIST_HEAD(&osd->o_osd_lru); 1014 INIT_LIST_HEAD(&osd->o_keepalive_item); 1015 osd->o_incarnation = 1; 1016 mutex_init(&osd->lock); 1017 } 1018 1019 static void osd_cleanup(struct ceph_osd *osd) 1020 { 1021 WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); 1022 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 1023 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 1024 WARN_ON(!list_empty(&osd->o_osd_lru)); 1025 WARN_ON(!list_empty(&osd->o_keepalive_item)); 1026 1027 if (osd->o_auth.authorizer) { 1028 WARN_ON(osd_homeless(osd)); 1029 ceph_auth_destroy_authorizer(osd->o_auth.authorizer); 1030 } 1031 } 1032 1033 /* 1034 * Track open sessions with osds. 1035 */ 1036 static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) 1037 { 1038 struct ceph_osd *osd; 1039 1040 WARN_ON(onum == CEPH_HOMELESS_OSD); 1041 1042 osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL); 1043 osd_init(osd); 1044 osd->o_osdc = osdc; 1045 osd->o_osd = onum; 1046 1047 ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); 1048 1049 return osd; 1050 } 1051 1052 static struct ceph_osd *get_osd(struct ceph_osd *osd) 1053 { 1054 if (atomic_inc_not_zero(&osd->o_ref)) { 1055 dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, 1056 atomic_read(&osd->o_ref)); 1057 return osd; 1058 } else { 1059 dout("get_osd %p FAIL\n", osd); 1060 return NULL; 1061 } 1062 } 1063 1064 static void put_osd(struct ceph_osd *osd) 1065 { 1066 dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), 1067 atomic_read(&osd->o_ref) - 1); 1068 if (atomic_dec_and_test(&osd->o_ref)) { 1069 osd_cleanup(osd); 1070 kfree(osd); 1071 } 1072 } 1073 1074 DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) 1075 1076 static void __move_osd_to_lru(struct ceph_osd *osd) 1077 { 1078 struct ceph_osd_client *osdc = osd->o_osdc; 1079 1080 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1081 BUG_ON(!list_empty(&osd->o_osd_lru)); 1082 1083 spin_lock(&osdc->osd_lru_lock); 1084 list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); 1085 spin_unlock(&osdc->osd_lru_lock); 1086 1087 osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; 1088 } 1089 1090 static void maybe_move_osd_to_lru(struct ceph_osd *osd) 1091 { 1092 if (RB_EMPTY_ROOT(&osd->o_requests) && 1093 RB_EMPTY_ROOT(&osd->o_linger_requests)) 1094 __move_osd_to_lru(osd); 1095 } 1096 1097 static void __remove_osd_from_lru(struct ceph_osd *osd) 1098 { 1099 struct ceph_osd_client *osdc = osd->o_osdc; 1100 1101 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1102 1103 spin_lock(&osdc->osd_lru_lock); 1104 if (!list_empty(&osd->o_osd_lru)) 1105 list_del_init(&osd->o_osd_lru); 1106 spin_unlock(&osdc->osd_lru_lock); 1107 } 1108 1109 /* 1110 * Close the connection and assign any leftover requests to the 1111 * homeless session. 1112 */ 1113 static void close_osd(struct ceph_osd *osd) 1114 { 1115 struct ceph_osd_client *osdc = osd->o_osdc; 1116 struct rb_node *n; 1117 1118 verify_osdc_wrlocked(osdc); 1119 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1120 1121 ceph_con_close(&osd->o_con); 1122 1123 for (n = rb_first(&osd->o_requests); n; ) { 1124 struct ceph_osd_request *req = 1125 rb_entry(n, struct ceph_osd_request, r_node); 1126 1127 n = rb_next(n); /* unlink_request() */ 1128 1129 dout(" reassigning req %p tid %llu\n", req, req->r_tid); 1130 unlink_request(osd, req); 1131 link_request(&osdc->homeless_osd, req); 1132 } 1133 for (n = rb_first(&osd->o_linger_requests); n; ) { 1134 struct ceph_osd_linger_request *lreq = 1135 rb_entry(n, struct ceph_osd_linger_request, node); 1136 1137 n = rb_next(n); /* unlink_linger() */ 1138 1139 dout(" reassigning lreq %p linger_id %llu\n", lreq, 1140 lreq->linger_id); 1141 unlink_linger(osd, lreq); 1142 link_linger(&osdc->homeless_osd, lreq); 1143 } 1144 1145 __remove_osd_from_lru(osd); 1146 erase_osd(&osdc->osds, osd); 1147 put_osd(osd); 1148 } 1149 1150 /* 1151 * reset osd connect 1152 */ 1153 static int reopen_osd(struct ceph_osd *osd) 1154 { 1155 struct ceph_entity_addr *peer_addr; 1156 1157 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 1158 1159 if (RB_EMPTY_ROOT(&osd->o_requests) && 1160 RB_EMPTY_ROOT(&osd->o_linger_requests)) { 1161 close_osd(osd); 1162 return -ENODEV; 1163 } 1164 1165 peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd]; 1166 if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && 1167 !ceph_con_opened(&osd->o_con)) { 1168 struct rb_node *n; 1169 1170 dout("osd addr hasn't changed and connection never opened, " 1171 "letting msgr retry\n"); 1172 /* touch each r_stamp for handle_timeout()'s benfit */ 1173 for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) { 1174 struct ceph_osd_request *req = 1175 rb_entry(n, struct ceph_osd_request, r_node); 1176 req->r_stamp = jiffies; 1177 } 1178 1179 return -EAGAIN; 1180 } 1181 1182 ceph_con_close(&osd->o_con); 1183 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr); 1184 osd->o_incarnation++; 1185 1186 return 0; 1187 } 1188 1189 static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o, 1190 bool wrlocked) 1191 { 1192 struct ceph_osd *osd; 1193 1194 if (wrlocked) 1195 verify_osdc_wrlocked(osdc); 1196 else 1197 verify_osdc_locked(osdc); 1198 1199 if (o != CEPH_HOMELESS_OSD) 1200 osd = lookup_osd(&osdc->osds, o); 1201 else 1202 osd = &osdc->homeless_osd; 1203 if (!osd) { 1204 if (!wrlocked) 1205 return ERR_PTR(-EAGAIN); 1206 1207 osd = create_osd(osdc, o); 1208 insert_osd(&osdc->osds, osd); 1209 ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, 1210 &osdc->osdmap->osd_addr[osd->o_osd]); 1211 } 1212 1213 dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd); 1214 return osd; 1215 } 1216 1217 /* 1218 * Create request <-> OSD session relation. 1219 * 1220 * @req has to be assigned a tid, @osd may be homeless. 1221 */ 1222 static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1223 { 1224 verify_osd_locked(osd); 1225 WARN_ON(!req->r_tid || req->r_osd); 1226 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1227 req, req->r_tid); 1228 1229 if (!osd_homeless(osd)) 1230 __remove_osd_from_lru(osd); 1231 else 1232 atomic_inc(&osd->o_osdc->num_homeless); 1233 1234 get_osd(osd); 1235 insert_request(&osd->o_requests, req); 1236 req->r_osd = osd; 1237 } 1238 1239 static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req) 1240 { 1241 verify_osd_locked(osd); 1242 WARN_ON(req->r_osd != osd); 1243 dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd, 1244 req, req->r_tid); 1245 1246 req->r_osd = NULL; 1247 erase_request(&osd->o_requests, req); 1248 put_osd(osd); 1249 1250 if (!osd_homeless(osd)) 1251 maybe_move_osd_to_lru(osd); 1252 else 1253 atomic_dec(&osd->o_osdc->num_homeless); 1254 } 1255 1256 static bool __pool_full(struct ceph_pg_pool_info *pi) 1257 { 1258 return pi->flags & CEPH_POOL_FLAG_FULL; 1259 } 1260 1261 static bool have_pool_full(struct ceph_osd_client *osdc) 1262 { 1263 struct rb_node *n; 1264 1265 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 1266 struct ceph_pg_pool_info *pi = 1267 rb_entry(n, struct ceph_pg_pool_info, node); 1268 1269 if (__pool_full(pi)) 1270 return true; 1271 } 1272 1273 return false; 1274 } 1275 1276 static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id) 1277 { 1278 struct ceph_pg_pool_info *pi; 1279 1280 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 1281 if (!pi) 1282 return false; 1283 1284 return __pool_full(pi); 1285 } 1286 1287 /* 1288 * Returns whether a request should be blocked from being sent 1289 * based on the current osdmap and osd_client settings. 1290 */ 1291 static bool target_should_be_paused(struct ceph_osd_client *osdc, 1292 const struct ceph_osd_request_target *t, 1293 struct ceph_pg_pool_info *pi) 1294 { 1295 bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 1296 bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 1297 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1298 __pool_full(pi); 1299 1300 WARN_ON(pi->id != t->base_oloc.pool); 1301 return (t->flags & CEPH_OSD_FLAG_READ && pauserd) || 1302 (t->flags & CEPH_OSD_FLAG_WRITE && pausewr); 1303 } 1304 1305 enum calc_target_result { 1306 CALC_TARGET_NO_ACTION = 0, 1307 CALC_TARGET_NEED_RESEND, 1308 CALC_TARGET_POOL_DNE, 1309 }; 1310 1311 static enum calc_target_result calc_target(struct ceph_osd_client *osdc, 1312 struct ceph_osd_request_target *t, 1313 u32 *last_force_resend, 1314 bool any_change) 1315 { 1316 struct ceph_pg_pool_info *pi; 1317 struct ceph_pg pgid, last_pgid; 1318 struct ceph_osds up, acting; 1319 bool force_resend = false; 1320 bool need_check_tiering = false; 1321 bool need_resend = false; 1322 bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); 1323 enum calc_target_result ct_res; 1324 int ret; 1325 1326 pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); 1327 if (!pi) { 1328 t->osd = CEPH_HOMELESS_OSD; 1329 ct_res = CALC_TARGET_POOL_DNE; 1330 goto out; 1331 } 1332 1333 if (osdc->osdmap->epoch == pi->last_force_request_resend) { 1334 if (last_force_resend && 1335 *last_force_resend < pi->last_force_request_resend) { 1336 *last_force_resend = pi->last_force_request_resend; 1337 force_resend = true; 1338 } else if (!last_force_resend) { 1339 force_resend = true; 1340 } 1341 } 1342 if (ceph_oid_empty(&t->target_oid) || force_resend) { 1343 ceph_oid_copy(&t->target_oid, &t->base_oid); 1344 need_check_tiering = true; 1345 } 1346 if (ceph_oloc_empty(&t->target_oloc) || force_resend) { 1347 ceph_oloc_copy(&t->target_oloc, &t->base_oloc); 1348 need_check_tiering = true; 1349 } 1350 1351 if (need_check_tiering && 1352 (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { 1353 if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) 1354 t->target_oloc.pool = pi->read_tier; 1355 if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) 1356 t->target_oloc.pool = pi->write_tier; 1357 } 1358 1359 ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid, 1360 &t->target_oloc, &pgid); 1361 if (ret) { 1362 WARN_ON(ret != -ENOENT); 1363 t->osd = CEPH_HOMELESS_OSD; 1364 ct_res = CALC_TARGET_POOL_DNE; 1365 goto out; 1366 } 1367 last_pgid.pool = pgid.pool; 1368 last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); 1369 1370 ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting); 1371 if (any_change && 1372 ceph_is_new_interval(&t->acting, 1373 &acting, 1374 &t->up, 1375 &up, 1376 t->size, 1377 pi->size, 1378 t->min_size, 1379 pi->min_size, 1380 t->pg_num, 1381 pi->pg_num, 1382 t->sort_bitwise, 1383 sort_bitwise, 1384 &last_pgid)) 1385 force_resend = true; 1386 1387 if (t->paused && !target_should_be_paused(osdc, t, pi)) { 1388 t->paused = false; 1389 need_resend = true; 1390 } 1391 1392 if (ceph_pg_compare(&t->pgid, &pgid) || 1393 ceph_osds_changed(&t->acting, &acting, any_change) || 1394 force_resend) { 1395 t->pgid = pgid; /* struct */ 1396 ceph_osds_copy(&t->acting, &acting); 1397 ceph_osds_copy(&t->up, &up); 1398 t->size = pi->size; 1399 t->min_size = pi->min_size; 1400 t->pg_num = pi->pg_num; 1401 t->pg_num_mask = pi->pg_num_mask; 1402 t->sort_bitwise = sort_bitwise; 1403 1404 t->osd = acting.primary; 1405 need_resend = true; 1406 } 1407 1408 ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION; 1409 out: 1410 dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd); 1411 return ct_res; 1412 } 1413 1414 static void setup_request_data(struct ceph_osd_request *req, 1415 struct ceph_msg *msg) 1416 { 1417 u32 data_len = 0; 1418 int i; 1419 1420 if (!list_empty(&msg->data)) 1421 return; 1422 1423 WARN_ON(msg->data_length); 1424 for (i = 0; i < req->r_num_ops; i++) { 1425 struct ceph_osd_req_op *op = &req->r_ops[i]; 1426 1427 switch (op->op) { 1428 /* request */ 1429 case CEPH_OSD_OP_WRITE: 1430 case CEPH_OSD_OP_WRITEFULL: 1431 WARN_ON(op->indata_len != op->extent.length); 1432 ceph_osdc_msg_data_add(msg, &op->extent.osd_data); 1433 break; 1434 case CEPH_OSD_OP_SETXATTR: 1435 case CEPH_OSD_OP_CMPXATTR: 1436 WARN_ON(op->indata_len != op->xattr.name_len + 1437 op->xattr.value_len); 1438 ceph_osdc_msg_data_add(msg, &op->xattr.osd_data); 1439 break; 1440 case CEPH_OSD_OP_NOTIFY_ACK: 1441 ceph_osdc_msg_data_add(msg, 1442 &op->notify_ack.request_data); 1443 break; 1444 1445 /* reply */ 1446 case CEPH_OSD_OP_STAT: 1447 ceph_osdc_msg_data_add(req->r_reply, 1448 &op->raw_data_in); 1449 break; 1450 case CEPH_OSD_OP_READ: 1451 ceph_osdc_msg_data_add(req->r_reply, 1452 &op->extent.osd_data); 1453 break; 1454 case CEPH_OSD_OP_LIST_WATCHERS: 1455 ceph_osdc_msg_data_add(req->r_reply, 1456 &op->list_watchers.response_data); 1457 break; 1458 1459 /* both */ 1460 case CEPH_OSD_OP_CALL: 1461 WARN_ON(op->indata_len != op->cls.class_len + 1462 op->cls.method_len + 1463 op->cls.indata_len); 1464 ceph_osdc_msg_data_add(msg, &op->cls.request_info); 1465 /* optional, can be NONE */ 1466 ceph_osdc_msg_data_add(msg, &op->cls.request_data); 1467 /* optional, can be NONE */ 1468 ceph_osdc_msg_data_add(req->r_reply, 1469 &op->cls.response_data); 1470 break; 1471 case CEPH_OSD_OP_NOTIFY: 1472 ceph_osdc_msg_data_add(msg, 1473 &op->notify.request_data); 1474 ceph_osdc_msg_data_add(req->r_reply, 1475 &op->notify.response_data); 1476 break; 1477 } 1478 1479 data_len += op->indata_len; 1480 } 1481 1482 WARN_ON(data_len != msg->data_length); 1483 } 1484 1485 static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg) 1486 { 1487 void *p = msg->front.iov_base; 1488 void *const end = p + msg->front_alloc_len; 1489 u32 data_len = 0; 1490 int i; 1491 1492 if (req->r_flags & CEPH_OSD_FLAG_WRITE) { 1493 /* snapshots aren't writeable */ 1494 WARN_ON(req->r_snapid != CEPH_NOSNAP); 1495 } else { 1496 WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || 1497 req->r_data_offset || req->r_snapc); 1498 } 1499 1500 setup_request_data(req, msg); 1501 1502 ceph_encode_32(&p, 1); /* client_inc, always 1 */ 1503 ceph_encode_32(&p, req->r_osdc->osdmap->epoch); 1504 ceph_encode_32(&p, req->r_flags); 1505 ceph_encode_timespec(p, &req->r_mtime); 1506 p += sizeof(struct ceph_timespec); 1507 /* aka reassert_version */ 1508 memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version)); 1509 p += sizeof(req->r_replay_version); 1510 1511 /* oloc */ 1512 ceph_start_encoding(&p, 5, 4, 1513 ceph_oloc_encoding_size(&req->r_t.target_oloc)); 1514 ceph_encode_64(&p, req->r_t.target_oloc.pool); 1515 ceph_encode_32(&p, -1); /* preferred */ 1516 ceph_encode_32(&p, 0); /* key len */ 1517 if (req->r_t.target_oloc.pool_ns) 1518 ceph_encode_string(&p, end, req->r_t.target_oloc.pool_ns->str, 1519 req->r_t.target_oloc.pool_ns->len); 1520 else 1521 ceph_encode_32(&p, 0); 1522 1523 /* pgid */ 1524 ceph_encode_8(&p, 1); 1525 ceph_encode_64(&p, req->r_t.pgid.pool); 1526 ceph_encode_32(&p, req->r_t.pgid.seed); 1527 ceph_encode_32(&p, -1); /* preferred */ 1528 1529 /* oid */ 1530 ceph_encode_32(&p, req->r_t.target_oid.name_len); 1531 memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len); 1532 p += req->r_t.target_oid.name_len; 1533 1534 /* ops, can imply data */ 1535 ceph_encode_16(&p, req->r_num_ops); 1536 for (i = 0; i < req->r_num_ops; i++) { 1537 data_len += osd_req_encode_op(p, &req->r_ops[i]); 1538 p += sizeof(struct ceph_osd_op); 1539 } 1540 1541 ceph_encode_64(&p, req->r_snapid); /* snapid */ 1542 if (req->r_snapc) { 1543 ceph_encode_64(&p, req->r_snapc->seq); 1544 ceph_encode_32(&p, req->r_snapc->num_snaps); 1545 for (i = 0; i < req->r_snapc->num_snaps; i++) 1546 ceph_encode_64(&p, req->r_snapc->snaps[i]); 1547 } else { 1548 ceph_encode_64(&p, 0); /* snap_seq */ 1549 ceph_encode_32(&p, 0); /* snaps len */ 1550 } 1551 1552 ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ 1553 1554 BUG_ON(p > end); 1555 msg->front.iov_len = p - msg->front.iov_base; 1556 msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ 1557 msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); 1558 msg->hdr.data_len = cpu_to_le32(data_len); 1559 /* 1560 * The header "data_off" is a hint to the receiver allowing it 1561 * to align received data into its buffers such that there's no 1562 * need to re-copy it before writing it to disk (direct I/O). 1563 */ 1564 msg->hdr.data_off = cpu_to_le16(req->r_data_offset); 1565 1566 dout("%s req %p oid %s oid_len %d front %zu data %u\n", __func__, 1567 req, req->r_t.target_oid.name, req->r_t.target_oid.name_len, 1568 msg->front.iov_len, data_len); 1569 } 1570 1571 /* 1572 * @req has to be assigned a tid and registered. 1573 */ 1574 static void send_request(struct ceph_osd_request *req) 1575 { 1576 struct ceph_osd *osd = req->r_osd; 1577 1578 verify_osd_locked(osd); 1579 WARN_ON(osd->o_osd != req->r_t.osd); 1580 1581 /* 1582 * We may have a previously queued request message hanging 1583 * around. Cancel it to avoid corrupting the msgr. 1584 */ 1585 if (req->r_sent) 1586 ceph_msg_revoke(req->r_request); 1587 1588 req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; 1589 if (req->r_attempts) 1590 req->r_flags |= CEPH_OSD_FLAG_RETRY; 1591 else 1592 WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); 1593 1594 encode_request(req, req->r_request); 1595 1596 dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n", 1597 __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, 1598 req->r_t.osd, req->r_flags, req->r_attempts); 1599 1600 req->r_t.paused = false; 1601 req->r_stamp = jiffies; 1602 req->r_attempts++; 1603 1604 req->r_sent = osd->o_incarnation; 1605 req->r_request->hdr.tid = cpu_to_le64(req->r_tid); 1606 ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); 1607 } 1608 1609 static void maybe_request_map(struct ceph_osd_client *osdc) 1610 { 1611 bool continuous = false; 1612 1613 verify_osdc_locked(osdc); 1614 WARN_ON(!osdc->osdmap->epoch); 1615 1616 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1617 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) || 1618 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 1619 dout("%s osdc %p continuous\n", __func__, osdc); 1620 continuous = true; 1621 } else { 1622 dout("%s osdc %p onetime\n", __func__, osdc); 1623 } 1624 1625 if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 1626 osdc->osdmap->epoch + 1, continuous)) 1627 ceph_monc_renew_subs(&osdc->client->monc); 1628 } 1629 1630 static void send_map_check(struct ceph_osd_request *req); 1631 1632 static void __submit_request(struct ceph_osd_request *req, bool wrlocked) 1633 { 1634 struct ceph_osd_client *osdc = req->r_osdc; 1635 struct ceph_osd *osd; 1636 enum calc_target_result ct_res; 1637 bool need_send = false; 1638 bool promoted = false; 1639 1640 WARN_ON(req->r_tid || req->r_got_reply); 1641 dout("%s req %p wrlocked %d\n", __func__, req, wrlocked); 1642 1643 again: 1644 ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, false); 1645 if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked) 1646 goto promote; 1647 1648 osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked); 1649 if (IS_ERR(osd)) { 1650 WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked); 1651 goto promote; 1652 } 1653 1654 if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1655 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) { 1656 dout("req %p pausewr\n", req); 1657 req->r_t.paused = true; 1658 maybe_request_map(osdc); 1659 } else if ((req->r_flags & CEPH_OSD_FLAG_READ) && 1660 ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 1661 dout("req %p pauserd\n", req); 1662 req->r_t.paused = true; 1663 maybe_request_map(osdc); 1664 } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && 1665 !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY | 1666 CEPH_OSD_FLAG_FULL_FORCE)) && 1667 (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 1668 pool_full(osdc, req->r_t.base_oloc.pool))) { 1669 dout("req %p full/pool_full\n", req); 1670 pr_warn_ratelimited("FULL or reached pool quota\n"); 1671 req->r_t.paused = true; 1672 maybe_request_map(osdc); 1673 } else if (!osd_homeless(osd)) { 1674 need_send = true; 1675 } else { 1676 maybe_request_map(osdc); 1677 } 1678 1679 mutex_lock(&osd->lock); 1680 /* 1681 * Assign the tid atomically with send_request() to protect 1682 * multiple writes to the same object from racing with each 1683 * other, resulting in out of order ops on the OSDs. 1684 */ 1685 req->r_tid = atomic64_inc_return(&osdc->last_tid); 1686 link_request(osd, req); 1687 if (need_send) 1688 send_request(req); 1689 mutex_unlock(&osd->lock); 1690 1691 if (ct_res == CALC_TARGET_POOL_DNE) 1692 send_map_check(req); 1693 1694 if (promoted) 1695 downgrade_write(&osdc->lock); 1696 return; 1697 1698 promote: 1699 up_read(&osdc->lock); 1700 down_write(&osdc->lock); 1701 wrlocked = true; 1702 promoted = true; 1703 goto again; 1704 } 1705 1706 static void account_request(struct ceph_osd_request *req) 1707 { 1708 unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK; 1709 1710 if (req->r_flags & CEPH_OSD_FLAG_READ) { 1711 WARN_ON(req->r_flags & mask); 1712 req->r_flags |= CEPH_OSD_FLAG_ACK; 1713 } else if (req->r_flags & CEPH_OSD_FLAG_WRITE) 1714 WARN_ON(!(req->r_flags & mask)); 1715 else 1716 WARN_ON(1); 1717 1718 WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask); 1719 atomic_inc(&req->r_osdc->num_requests); 1720 } 1721 1722 static void submit_request(struct ceph_osd_request *req, bool wrlocked) 1723 { 1724 ceph_osdc_get_request(req); 1725 account_request(req); 1726 __submit_request(req, wrlocked); 1727 } 1728 1729 static void finish_request(struct ceph_osd_request *req) 1730 { 1731 struct ceph_osd_client *osdc = req->r_osdc; 1732 struct ceph_osd *osd = req->r_osd; 1733 1734 verify_osd_locked(osd); 1735 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1736 1737 WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); 1738 unlink_request(osd, req); 1739 atomic_dec(&osdc->num_requests); 1740 1741 /* 1742 * If an OSD has failed or returned and a request has been sent 1743 * twice, it's possible to get a reply and end up here while the 1744 * request message is queued for delivery. We will ignore the 1745 * reply, so not a big deal, but better to try and catch it. 1746 */ 1747 ceph_msg_revoke(req->r_request); 1748 ceph_msg_revoke_incoming(req->r_reply); 1749 } 1750 1751 static void __complete_request(struct ceph_osd_request *req) 1752 { 1753 if (req->r_callback) 1754 req->r_callback(req); 1755 else 1756 complete_all(&req->r_completion); 1757 } 1758 1759 /* 1760 * Note that this is open-coded in handle_reply(), which has to deal 1761 * with ack vs commit, dup acks, etc. 1762 */ 1763 static void complete_request(struct ceph_osd_request *req, int err) 1764 { 1765 dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); 1766 1767 req->r_result = err; 1768 finish_request(req); 1769 __complete_request(req); 1770 complete_all(&req->r_done_completion); 1771 ceph_osdc_put_request(req); 1772 } 1773 1774 static void cancel_map_check(struct ceph_osd_request *req) 1775 { 1776 struct ceph_osd_client *osdc = req->r_osdc; 1777 struct ceph_osd_request *lookup_req; 1778 1779 verify_osdc_wrlocked(osdc); 1780 1781 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1782 if (!lookup_req) 1783 return; 1784 1785 WARN_ON(lookup_req != req); 1786 erase_request_mc(&osdc->map_checks, req); 1787 ceph_osdc_put_request(req); 1788 } 1789 1790 static void cancel_request(struct ceph_osd_request *req) 1791 { 1792 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 1793 1794 cancel_map_check(req); 1795 finish_request(req); 1796 complete_all(&req->r_done_completion); 1797 ceph_osdc_put_request(req); 1798 } 1799 1800 static void check_pool_dne(struct ceph_osd_request *req) 1801 { 1802 struct ceph_osd_client *osdc = req->r_osdc; 1803 struct ceph_osdmap *map = osdc->osdmap; 1804 1805 verify_osdc_wrlocked(osdc); 1806 WARN_ON(!map->epoch); 1807 1808 if (req->r_attempts) { 1809 /* 1810 * We sent a request earlier, which means that 1811 * previously the pool existed, and now it does not 1812 * (i.e., it was deleted). 1813 */ 1814 req->r_map_dne_bound = map->epoch; 1815 dout("%s req %p tid %llu pool disappeared\n", __func__, req, 1816 req->r_tid); 1817 } else { 1818 dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__, 1819 req, req->r_tid, req->r_map_dne_bound, map->epoch); 1820 } 1821 1822 if (req->r_map_dne_bound) { 1823 if (map->epoch >= req->r_map_dne_bound) { 1824 /* we had a new enough map */ 1825 pr_info_ratelimited("tid %llu pool does not exist\n", 1826 req->r_tid); 1827 complete_request(req, -ENOENT); 1828 } 1829 } else { 1830 send_map_check(req); 1831 } 1832 } 1833 1834 static void map_check_cb(struct ceph_mon_generic_request *greq) 1835 { 1836 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 1837 struct ceph_osd_request *req; 1838 u64 tid = greq->private_data; 1839 1840 WARN_ON(greq->result || !greq->u.newest); 1841 1842 down_write(&osdc->lock); 1843 req = lookup_request_mc(&osdc->map_checks, tid); 1844 if (!req) { 1845 dout("%s tid %llu dne\n", __func__, tid); 1846 goto out_unlock; 1847 } 1848 1849 dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__, 1850 req, req->r_tid, req->r_map_dne_bound, greq->u.newest); 1851 if (!req->r_map_dne_bound) 1852 req->r_map_dne_bound = greq->u.newest; 1853 erase_request_mc(&osdc->map_checks, req); 1854 check_pool_dne(req); 1855 1856 ceph_osdc_put_request(req); 1857 out_unlock: 1858 up_write(&osdc->lock); 1859 } 1860 1861 static void send_map_check(struct ceph_osd_request *req) 1862 { 1863 struct ceph_osd_client *osdc = req->r_osdc; 1864 struct ceph_osd_request *lookup_req; 1865 int ret; 1866 1867 verify_osdc_wrlocked(osdc); 1868 1869 lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid); 1870 if (lookup_req) { 1871 WARN_ON(lookup_req != req); 1872 return; 1873 } 1874 1875 ceph_osdc_get_request(req); 1876 insert_request_mc(&osdc->map_checks, req); 1877 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 1878 map_check_cb, req->r_tid); 1879 WARN_ON(ret); 1880 } 1881 1882 /* 1883 * lingering requests, watch/notify v2 infrastructure 1884 */ 1885 static void linger_release(struct kref *kref) 1886 { 1887 struct ceph_osd_linger_request *lreq = 1888 container_of(kref, struct ceph_osd_linger_request, kref); 1889 1890 dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq, 1891 lreq->reg_req, lreq->ping_req); 1892 WARN_ON(!RB_EMPTY_NODE(&lreq->node)); 1893 WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node)); 1894 WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node)); 1895 WARN_ON(!list_empty(&lreq->scan_item)); 1896 WARN_ON(!list_empty(&lreq->pending_lworks)); 1897 WARN_ON(lreq->osd); 1898 1899 if (lreq->reg_req) 1900 ceph_osdc_put_request(lreq->reg_req); 1901 if (lreq->ping_req) 1902 ceph_osdc_put_request(lreq->ping_req); 1903 target_destroy(&lreq->t); 1904 kfree(lreq); 1905 } 1906 1907 static void linger_put(struct ceph_osd_linger_request *lreq) 1908 { 1909 if (lreq) 1910 kref_put(&lreq->kref, linger_release); 1911 } 1912 1913 static struct ceph_osd_linger_request * 1914 linger_get(struct ceph_osd_linger_request *lreq) 1915 { 1916 kref_get(&lreq->kref); 1917 return lreq; 1918 } 1919 1920 static struct ceph_osd_linger_request * 1921 linger_alloc(struct ceph_osd_client *osdc) 1922 { 1923 struct ceph_osd_linger_request *lreq; 1924 1925 lreq = kzalloc(sizeof(*lreq), GFP_NOIO); 1926 if (!lreq) 1927 return NULL; 1928 1929 kref_init(&lreq->kref); 1930 mutex_init(&lreq->lock); 1931 RB_CLEAR_NODE(&lreq->node); 1932 RB_CLEAR_NODE(&lreq->osdc_node); 1933 RB_CLEAR_NODE(&lreq->mc_node); 1934 INIT_LIST_HEAD(&lreq->scan_item); 1935 INIT_LIST_HEAD(&lreq->pending_lworks); 1936 init_completion(&lreq->reg_commit_wait); 1937 init_completion(&lreq->notify_finish_wait); 1938 1939 lreq->osdc = osdc; 1940 target_init(&lreq->t); 1941 1942 dout("%s lreq %p\n", __func__, lreq); 1943 return lreq; 1944 } 1945 1946 DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node) 1947 DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node) 1948 DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node) 1949 1950 /* 1951 * Create linger request <-> OSD session relation. 1952 * 1953 * @lreq has to be registered, @osd may be homeless. 1954 */ 1955 static void link_linger(struct ceph_osd *osd, 1956 struct ceph_osd_linger_request *lreq) 1957 { 1958 verify_osd_locked(osd); 1959 WARN_ON(!lreq->linger_id || lreq->osd); 1960 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1961 osd->o_osd, lreq, lreq->linger_id); 1962 1963 if (!osd_homeless(osd)) 1964 __remove_osd_from_lru(osd); 1965 else 1966 atomic_inc(&osd->o_osdc->num_homeless); 1967 1968 get_osd(osd); 1969 insert_linger(&osd->o_linger_requests, lreq); 1970 lreq->osd = osd; 1971 } 1972 1973 static void unlink_linger(struct ceph_osd *osd, 1974 struct ceph_osd_linger_request *lreq) 1975 { 1976 verify_osd_locked(osd); 1977 WARN_ON(lreq->osd != osd); 1978 dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd, 1979 osd->o_osd, lreq, lreq->linger_id); 1980 1981 lreq->osd = NULL; 1982 erase_linger(&osd->o_linger_requests, lreq); 1983 put_osd(osd); 1984 1985 if (!osd_homeless(osd)) 1986 maybe_move_osd_to_lru(osd); 1987 else 1988 atomic_dec(&osd->o_osdc->num_homeless); 1989 } 1990 1991 static bool __linger_registered(struct ceph_osd_linger_request *lreq) 1992 { 1993 verify_osdc_locked(lreq->osdc); 1994 1995 return !RB_EMPTY_NODE(&lreq->osdc_node); 1996 } 1997 1998 static bool linger_registered(struct ceph_osd_linger_request *lreq) 1999 { 2000 struct ceph_osd_client *osdc = lreq->osdc; 2001 bool registered; 2002 2003 down_read(&osdc->lock); 2004 registered = __linger_registered(lreq); 2005 up_read(&osdc->lock); 2006 2007 return registered; 2008 } 2009 2010 static void linger_register(struct ceph_osd_linger_request *lreq) 2011 { 2012 struct ceph_osd_client *osdc = lreq->osdc; 2013 2014 verify_osdc_wrlocked(osdc); 2015 WARN_ON(lreq->linger_id); 2016 2017 linger_get(lreq); 2018 lreq->linger_id = ++osdc->last_linger_id; 2019 insert_linger_osdc(&osdc->linger_requests, lreq); 2020 } 2021 2022 static void linger_unregister(struct ceph_osd_linger_request *lreq) 2023 { 2024 struct ceph_osd_client *osdc = lreq->osdc; 2025 2026 verify_osdc_wrlocked(osdc); 2027 2028 erase_linger_osdc(&osdc->linger_requests, lreq); 2029 linger_put(lreq); 2030 } 2031 2032 static void cancel_linger_request(struct ceph_osd_request *req) 2033 { 2034 struct ceph_osd_linger_request *lreq = req->r_priv; 2035 2036 WARN_ON(!req->r_linger); 2037 cancel_request(req); 2038 linger_put(lreq); 2039 } 2040 2041 struct linger_work { 2042 struct work_struct work; 2043 struct ceph_osd_linger_request *lreq; 2044 struct list_head pending_item; 2045 unsigned long queued_stamp; 2046 2047 union { 2048 struct { 2049 u64 notify_id; 2050 u64 notifier_id; 2051 void *payload; /* points into @msg front */ 2052 size_t payload_len; 2053 2054 struct ceph_msg *msg; /* for ceph_msg_put() */ 2055 } notify; 2056 struct { 2057 int err; 2058 } error; 2059 }; 2060 }; 2061 2062 static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq, 2063 work_func_t workfn) 2064 { 2065 struct linger_work *lwork; 2066 2067 lwork = kzalloc(sizeof(*lwork), GFP_NOIO); 2068 if (!lwork) 2069 return NULL; 2070 2071 INIT_WORK(&lwork->work, workfn); 2072 INIT_LIST_HEAD(&lwork->pending_item); 2073 lwork->lreq = linger_get(lreq); 2074 2075 return lwork; 2076 } 2077 2078 static void lwork_free(struct linger_work *lwork) 2079 { 2080 struct ceph_osd_linger_request *lreq = lwork->lreq; 2081 2082 mutex_lock(&lreq->lock); 2083 list_del(&lwork->pending_item); 2084 mutex_unlock(&lreq->lock); 2085 2086 linger_put(lreq); 2087 kfree(lwork); 2088 } 2089 2090 static void lwork_queue(struct linger_work *lwork) 2091 { 2092 struct ceph_osd_linger_request *lreq = lwork->lreq; 2093 struct ceph_osd_client *osdc = lreq->osdc; 2094 2095 verify_lreq_locked(lreq); 2096 WARN_ON(!list_empty(&lwork->pending_item)); 2097 2098 lwork->queued_stamp = jiffies; 2099 list_add_tail(&lwork->pending_item, &lreq->pending_lworks); 2100 queue_work(osdc->notify_wq, &lwork->work); 2101 } 2102 2103 static void do_watch_notify(struct work_struct *w) 2104 { 2105 struct linger_work *lwork = container_of(w, struct linger_work, work); 2106 struct ceph_osd_linger_request *lreq = lwork->lreq; 2107 2108 if (!linger_registered(lreq)) { 2109 dout("%s lreq %p not registered\n", __func__, lreq); 2110 goto out; 2111 } 2112 2113 WARN_ON(!lreq->is_watch); 2114 dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n", 2115 __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id, 2116 lwork->notify.payload_len); 2117 lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id, 2118 lwork->notify.notifier_id, lwork->notify.payload, 2119 lwork->notify.payload_len); 2120 2121 out: 2122 ceph_msg_put(lwork->notify.msg); 2123 lwork_free(lwork); 2124 } 2125 2126 static void do_watch_error(struct work_struct *w) 2127 { 2128 struct linger_work *lwork = container_of(w, struct linger_work, work); 2129 struct ceph_osd_linger_request *lreq = lwork->lreq; 2130 2131 if (!linger_registered(lreq)) { 2132 dout("%s lreq %p not registered\n", __func__, lreq); 2133 goto out; 2134 } 2135 2136 dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err); 2137 lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err); 2138 2139 out: 2140 lwork_free(lwork); 2141 } 2142 2143 static void queue_watch_error(struct ceph_osd_linger_request *lreq) 2144 { 2145 struct linger_work *lwork; 2146 2147 lwork = lwork_alloc(lreq, do_watch_error); 2148 if (!lwork) { 2149 pr_err("failed to allocate error-lwork\n"); 2150 return; 2151 } 2152 2153 lwork->error.err = lreq->last_error; 2154 lwork_queue(lwork); 2155 } 2156 2157 static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq, 2158 int result) 2159 { 2160 if (!completion_done(&lreq->reg_commit_wait)) { 2161 lreq->reg_commit_error = (result <= 0 ? result : 0); 2162 complete_all(&lreq->reg_commit_wait); 2163 } 2164 } 2165 2166 static void linger_commit_cb(struct ceph_osd_request *req) 2167 { 2168 struct ceph_osd_linger_request *lreq = req->r_priv; 2169 2170 mutex_lock(&lreq->lock); 2171 dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq, 2172 lreq->linger_id, req->r_result); 2173 WARN_ON(!__linger_registered(lreq)); 2174 linger_reg_commit_complete(lreq, req->r_result); 2175 lreq->committed = true; 2176 2177 if (!lreq->is_watch) { 2178 struct ceph_osd_data *osd_data = 2179 osd_req_op_data(req, 0, notify, response_data); 2180 void *p = page_address(osd_data->pages[0]); 2181 2182 WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY || 2183 osd_data->type != CEPH_OSD_DATA_TYPE_PAGES); 2184 2185 /* make note of the notify_id */ 2186 if (req->r_ops[0].outdata_len >= sizeof(u64)) { 2187 lreq->notify_id = ceph_decode_64(&p); 2188 dout("lreq %p notify_id %llu\n", lreq, 2189 lreq->notify_id); 2190 } else { 2191 dout("lreq %p no notify_id\n", lreq); 2192 } 2193 } 2194 2195 mutex_unlock(&lreq->lock); 2196 linger_put(lreq); 2197 } 2198 2199 static int normalize_watch_error(int err) 2200 { 2201 /* 2202 * Translate ENOENT -> ENOTCONN so that a delete->disconnection 2203 * notification and a failure to reconnect because we raced with 2204 * the delete appear the same to the user. 2205 */ 2206 if (err == -ENOENT) 2207 err = -ENOTCONN; 2208 2209 return err; 2210 } 2211 2212 static void linger_reconnect_cb(struct ceph_osd_request *req) 2213 { 2214 struct ceph_osd_linger_request *lreq = req->r_priv; 2215 2216 mutex_lock(&lreq->lock); 2217 dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__, 2218 lreq, lreq->linger_id, req->r_result, lreq->last_error); 2219 if (req->r_result < 0) { 2220 if (!lreq->last_error) { 2221 lreq->last_error = normalize_watch_error(req->r_result); 2222 queue_watch_error(lreq); 2223 } 2224 } 2225 2226 mutex_unlock(&lreq->lock); 2227 linger_put(lreq); 2228 } 2229 2230 static void send_linger(struct ceph_osd_linger_request *lreq) 2231 { 2232 struct ceph_osd_request *req = lreq->reg_req; 2233 struct ceph_osd_req_op *op = &req->r_ops[0]; 2234 2235 verify_osdc_wrlocked(req->r_osdc); 2236 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2237 2238 if (req->r_osd) 2239 cancel_linger_request(req); 2240 2241 request_reinit(req); 2242 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 2243 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 2244 req->r_flags = lreq->t.flags; 2245 req->r_mtime = lreq->mtime; 2246 2247 mutex_lock(&lreq->lock); 2248 if (lreq->is_watch && lreq->committed) { 2249 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2250 op->watch.cookie != lreq->linger_id); 2251 op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT; 2252 op->watch.gen = ++lreq->register_gen; 2253 dout("lreq %p reconnect register_gen %u\n", lreq, 2254 op->watch.gen); 2255 req->r_callback = linger_reconnect_cb; 2256 } else { 2257 if (!lreq->is_watch) 2258 lreq->notify_id = 0; 2259 else 2260 WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH); 2261 dout("lreq %p register\n", lreq); 2262 req->r_callback = linger_commit_cb; 2263 } 2264 mutex_unlock(&lreq->lock); 2265 2266 req->r_priv = linger_get(lreq); 2267 req->r_linger = true; 2268 2269 submit_request(req, true); 2270 } 2271 2272 static void linger_ping_cb(struct ceph_osd_request *req) 2273 { 2274 struct ceph_osd_linger_request *lreq = req->r_priv; 2275 2276 mutex_lock(&lreq->lock); 2277 dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n", 2278 __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent, 2279 lreq->last_error); 2280 if (lreq->register_gen == req->r_ops[0].watch.gen) { 2281 if (!req->r_result) { 2282 lreq->watch_valid_thru = lreq->ping_sent; 2283 } else if (!lreq->last_error) { 2284 lreq->last_error = normalize_watch_error(req->r_result); 2285 queue_watch_error(lreq); 2286 } 2287 } else { 2288 dout("lreq %p register_gen %u ignoring old pong %u\n", lreq, 2289 lreq->register_gen, req->r_ops[0].watch.gen); 2290 } 2291 2292 mutex_unlock(&lreq->lock); 2293 linger_put(lreq); 2294 } 2295 2296 static void send_linger_ping(struct ceph_osd_linger_request *lreq) 2297 { 2298 struct ceph_osd_client *osdc = lreq->osdc; 2299 struct ceph_osd_request *req = lreq->ping_req; 2300 struct ceph_osd_req_op *op = &req->r_ops[0]; 2301 2302 if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) { 2303 dout("%s PAUSERD\n", __func__); 2304 return; 2305 } 2306 2307 lreq->ping_sent = jiffies; 2308 dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n", 2309 __func__, lreq, lreq->linger_id, lreq->ping_sent, 2310 lreq->register_gen); 2311 2312 if (req->r_osd) 2313 cancel_linger_request(req); 2314 2315 request_reinit(req); 2316 target_copy(&req->r_t, &lreq->t); 2317 2318 WARN_ON(op->op != CEPH_OSD_OP_WATCH || 2319 op->watch.cookie != lreq->linger_id || 2320 op->watch.op != CEPH_OSD_WATCH_OP_PING); 2321 op->watch.gen = lreq->register_gen; 2322 req->r_callback = linger_ping_cb; 2323 req->r_priv = linger_get(lreq); 2324 req->r_linger = true; 2325 2326 ceph_osdc_get_request(req); 2327 account_request(req); 2328 req->r_tid = atomic64_inc_return(&osdc->last_tid); 2329 link_request(lreq->osd, req); 2330 send_request(req); 2331 } 2332 2333 static void linger_submit(struct ceph_osd_linger_request *lreq) 2334 { 2335 struct ceph_osd_client *osdc = lreq->osdc; 2336 struct ceph_osd *osd; 2337 2338 calc_target(osdc, &lreq->t, &lreq->last_force_resend, false); 2339 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2340 link_linger(osd, lreq); 2341 2342 send_linger(lreq); 2343 } 2344 2345 static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq) 2346 { 2347 struct ceph_osd_client *osdc = lreq->osdc; 2348 struct ceph_osd_linger_request *lookup_lreq; 2349 2350 verify_osdc_wrlocked(osdc); 2351 2352 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2353 lreq->linger_id); 2354 if (!lookup_lreq) 2355 return; 2356 2357 WARN_ON(lookup_lreq != lreq); 2358 erase_linger_mc(&osdc->linger_map_checks, lreq); 2359 linger_put(lreq); 2360 } 2361 2362 /* 2363 * @lreq has to be both registered and linked. 2364 */ 2365 static void __linger_cancel(struct ceph_osd_linger_request *lreq) 2366 { 2367 if (lreq->is_watch && lreq->ping_req->r_osd) 2368 cancel_linger_request(lreq->ping_req); 2369 if (lreq->reg_req->r_osd) 2370 cancel_linger_request(lreq->reg_req); 2371 cancel_linger_map_check(lreq); 2372 unlink_linger(lreq->osd, lreq); 2373 linger_unregister(lreq); 2374 } 2375 2376 static void linger_cancel(struct ceph_osd_linger_request *lreq) 2377 { 2378 struct ceph_osd_client *osdc = lreq->osdc; 2379 2380 down_write(&osdc->lock); 2381 if (__linger_registered(lreq)) 2382 __linger_cancel(lreq); 2383 up_write(&osdc->lock); 2384 } 2385 2386 static void send_linger_map_check(struct ceph_osd_linger_request *lreq); 2387 2388 static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq) 2389 { 2390 struct ceph_osd_client *osdc = lreq->osdc; 2391 struct ceph_osdmap *map = osdc->osdmap; 2392 2393 verify_osdc_wrlocked(osdc); 2394 WARN_ON(!map->epoch); 2395 2396 if (lreq->register_gen) { 2397 lreq->map_dne_bound = map->epoch; 2398 dout("%s lreq %p linger_id %llu pool disappeared\n", __func__, 2399 lreq, lreq->linger_id); 2400 } else { 2401 dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n", 2402 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2403 map->epoch); 2404 } 2405 2406 if (lreq->map_dne_bound) { 2407 if (map->epoch >= lreq->map_dne_bound) { 2408 /* we had a new enough map */ 2409 pr_info("linger_id %llu pool does not exist\n", 2410 lreq->linger_id); 2411 linger_reg_commit_complete(lreq, -ENOENT); 2412 __linger_cancel(lreq); 2413 } 2414 } else { 2415 send_linger_map_check(lreq); 2416 } 2417 } 2418 2419 static void linger_map_check_cb(struct ceph_mon_generic_request *greq) 2420 { 2421 struct ceph_osd_client *osdc = &greq->monc->client->osdc; 2422 struct ceph_osd_linger_request *lreq; 2423 u64 linger_id = greq->private_data; 2424 2425 WARN_ON(greq->result || !greq->u.newest); 2426 2427 down_write(&osdc->lock); 2428 lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id); 2429 if (!lreq) { 2430 dout("%s linger_id %llu dne\n", __func__, linger_id); 2431 goto out_unlock; 2432 } 2433 2434 dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n", 2435 __func__, lreq, lreq->linger_id, lreq->map_dne_bound, 2436 greq->u.newest); 2437 if (!lreq->map_dne_bound) 2438 lreq->map_dne_bound = greq->u.newest; 2439 erase_linger_mc(&osdc->linger_map_checks, lreq); 2440 check_linger_pool_dne(lreq); 2441 2442 linger_put(lreq); 2443 out_unlock: 2444 up_write(&osdc->lock); 2445 } 2446 2447 static void send_linger_map_check(struct ceph_osd_linger_request *lreq) 2448 { 2449 struct ceph_osd_client *osdc = lreq->osdc; 2450 struct ceph_osd_linger_request *lookup_lreq; 2451 int ret; 2452 2453 verify_osdc_wrlocked(osdc); 2454 2455 lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks, 2456 lreq->linger_id); 2457 if (lookup_lreq) { 2458 WARN_ON(lookup_lreq != lreq); 2459 return; 2460 } 2461 2462 linger_get(lreq); 2463 insert_linger_mc(&osdc->linger_map_checks, lreq); 2464 ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap", 2465 linger_map_check_cb, lreq->linger_id); 2466 WARN_ON(ret); 2467 } 2468 2469 static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq) 2470 { 2471 int ret; 2472 2473 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2474 ret = wait_for_completion_interruptible(&lreq->reg_commit_wait); 2475 return ret ?: lreq->reg_commit_error; 2476 } 2477 2478 static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq) 2479 { 2480 int ret; 2481 2482 dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); 2483 ret = wait_for_completion_interruptible(&lreq->notify_finish_wait); 2484 return ret ?: lreq->notify_finish_error; 2485 } 2486 2487 /* 2488 * Timeout callback, called every N seconds. When 1 or more OSD 2489 * requests has been active for more than N seconds, we send a keepalive 2490 * (tag + timestamp) to its OSD to ensure any communications channel 2491 * reset is detected. 2492 */ 2493 static void handle_timeout(struct work_struct *work) 2494 { 2495 struct ceph_osd_client *osdc = 2496 container_of(work, struct ceph_osd_client, timeout_work.work); 2497 struct ceph_options *opts = osdc->client->options; 2498 unsigned long cutoff = jiffies - opts->osd_keepalive_timeout; 2499 LIST_HEAD(slow_osds); 2500 struct rb_node *n, *p; 2501 2502 dout("%s osdc %p\n", __func__, osdc); 2503 down_write(&osdc->lock); 2504 2505 /* 2506 * ping osds that are a bit slow. this ensures that if there 2507 * is a break in the TCP connection we will notice, and reopen 2508 * a connection with that osd (from the fault callback). 2509 */ 2510 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 2511 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 2512 bool found = false; 2513 2514 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 2515 struct ceph_osd_request *req = 2516 rb_entry(p, struct ceph_osd_request, r_node); 2517 2518 if (time_before(req->r_stamp, cutoff)) { 2519 dout(" req %p tid %llu on osd%d is laggy\n", 2520 req, req->r_tid, osd->o_osd); 2521 found = true; 2522 } 2523 } 2524 for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) { 2525 struct ceph_osd_linger_request *lreq = 2526 rb_entry(p, struct ceph_osd_linger_request, node); 2527 2528 dout(" lreq %p linger_id %llu is served by osd%d\n", 2529 lreq, lreq->linger_id, osd->o_osd); 2530 found = true; 2531 2532 mutex_lock(&lreq->lock); 2533 if (lreq->is_watch && lreq->committed && !lreq->last_error) 2534 send_linger_ping(lreq); 2535 mutex_unlock(&lreq->lock); 2536 } 2537 2538 if (found) 2539 list_move_tail(&osd->o_keepalive_item, &slow_osds); 2540 } 2541 2542 if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds)) 2543 maybe_request_map(osdc); 2544 2545 while (!list_empty(&slow_osds)) { 2546 struct ceph_osd *osd = list_first_entry(&slow_osds, 2547 struct ceph_osd, 2548 o_keepalive_item); 2549 list_del_init(&osd->o_keepalive_item); 2550 ceph_con_keepalive(&osd->o_con); 2551 } 2552 2553 up_write(&osdc->lock); 2554 schedule_delayed_work(&osdc->timeout_work, 2555 osdc->client->options->osd_keepalive_timeout); 2556 } 2557 2558 static void handle_osds_timeout(struct work_struct *work) 2559 { 2560 struct ceph_osd_client *osdc = 2561 container_of(work, struct ceph_osd_client, 2562 osds_timeout_work.work); 2563 unsigned long delay = osdc->client->options->osd_idle_ttl / 4; 2564 struct ceph_osd *osd, *nosd; 2565 2566 dout("%s osdc %p\n", __func__, osdc); 2567 down_write(&osdc->lock); 2568 list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { 2569 if (time_before(jiffies, osd->lru_ttl)) 2570 break; 2571 2572 WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests)); 2573 WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests)); 2574 close_osd(osd); 2575 } 2576 2577 up_write(&osdc->lock); 2578 schedule_delayed_work(&osdc->osds_timeout_work, 2579 round_jiffies_relative(delay)); 2580 } 2581 2582 static int ceph_oloc_decode(void **p, void *end, 2583 struct ceph_object_locator *oloc) 2584 { 2585 u8 struct_v, struct_cv; 2586 u32 len; 2587 void *struct_end; 2588 int ret = 0; 2589 2590 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2591 struct_v = ceph_decode_8(p); 2592 struct_cv = ceph_decode_8(p); 2593 if (struct_v < 3) { 2594 pr_warn("got v %d < 3 cv %d of ceph_object_locator\n", 2595 struct_v, struct_cv); 2596 goto e_inval; 2597 } 2598 if (struct_cv > 6) { 2599 pr_warn("got v %d cv %d > 6 of ceph_object_locator\n", 2600 struct_v, struct_cv); 2601 goto e_inval; 2602 } 2603 len = ceph_decode_32(p); 2604 ceph_decode_need(p, end, len, e_inval); 2605 struct_end = *p + len; 2606 2607 oloc->pool = ceph_decode_64(p); 2608 *p += 4; /* skip preferred */ 2609 2610 len = ceph_decode_32(p); 2611 if (len > 0) { 2612 pr_warn("ceph_object_locator::key is set\n"); 2613 goto e_inval; 2614 } 2615 2616 if (struct_v >= 5) { 2617 bool changed = false; 2618 2619 len = ceph_decode_32(p); 2620 if (len > 0) { 2621 ceph_decode_need(p, end, len, e_inval); 2622 if (!oloc->pool_ns || 2623 ceph_compare_string(oloc->pool_ns, *p, len)) 2624 changed = true; 2625 *p += len; 2626 } else { 2627 if (oloc->pool_ns) 2628 changed = true; 2629 } 2630 if (changed) { 2631 /* redirect changes namespace */ 2632 pr_warn("ceph_object_locator::nspace is changed\n"); 2633 goto e_inval; 2634 } 2635 } 2636 2637 if (struct_v >= 6) { 2638 s64 hash = ceph_decode_64(p); 2639 if (hash != -1) { 2640 pr_warn("ceph_object_locator::hash is set\n"); 2641 goto e_inval; 2642 } 2643 } 2644 2645 /* skip the rest */ 2646 *p = struct_end; 2647 out: 2648 return ret; 2649 2650 e_inval: 2651 ret = -EINVAL; 2652 goto out; 2653 } 2654 2655 static int ceph_redirect_decode(void **p, void *end, 2656 struct ceph_request_redirect *redir) 2657 { 2658 u8 struct_v, struct_cv; 2659 u32 len; 2660 void *struct_end; 2661 int ret; 2662 2663 ceph_decode_need(p, end, 1 + 1 + 4, e_inval); 2664 struct_v = ceph_decode_8(p); 2665 struct_cv = ceph_decode_8(p); 2666 if (struct_cv > 1) { 2667 pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", 2668 struct_v, struct_cv); 2669 goto e_inval; 2670 } 2671 len = ceph_decode_32(p); 2672 ceph_decode_need(p, end, len, e_inval); 2673 struct_end = *p + len; 2674 2675 ret = ceph_oloc_decode(p, end, &redir->oloc); 2676 if (ret) 2677 goto out; 2678 2679 len = ceph_decode_32(p); 2680 if (len > 0) { 2681 pr_warn("ceph_request_redirect::object_name is set\n"); 2682 goto e_inval; 2683 } 2684 2685 len = ceph_decode_32(p); 2686 *p += len; /* skip osd_instructions */ 2687 2688 /* skip the rest */ 2689 *p = struct_end; 2690 out: 2691 return ret; 2692 2693 e_inval: 2694 ret = -EINVAL; 2695 goto out; 2696 } 2697 2698 struct MOSDOpReply { 2699 struct ceph_pg pgid; 2700 u64 flags; 2701 int result; 2702 u32 epoch; 2703 int num_ops; 2704 u32 outdata_len[CEPH_OSD_MAX_OPS]; 2705 s32 rval[CEPH_OSD_MAX_OPS]; 2706 int retry_attempt; 2707 struct ceph_eversion replay_version; 2708 u64 user_version; 2709 struct ceph_request_redirect redirect; 2710 }; 2711 2712 static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) 2713 { 2714 void *p = msg->front.iov_base; 2715 void *const end = p + msg->front.iov_len; 2716 u16 version = le16_to_cpu(msg->hdr.version); 2717 struct ceph_eversion bad_replay_version; 2718 u8 decode_redir; 2719 u32 len; 2720 int ret; 2721 int i; 2722 2723 ceph_decode_32_safe(&p, end, len, e_inval); 2724 ceph_decode_need(&p, end, len, e_inval); 2725 p += len; /* skip oid */ 2726 2727 ret = ceph_decode_pgid(&p, end, &m->pgid); 2728 if (ret) 2729 return ret; 2730 2731 ceph_decode_64_safe(&p, end, m->flags, e_inval); 2732 ceph_decode_32_safe(&p, end, m->result, e_inval); 2733 ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); 2734 memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); 2735 p += sizeof(bad_replay_version); 2736 ceph_decode_32_safe(&p, end, m->epoch, e_inval); 2737 2738 ceph_decode_32_safe(&p, end, m->num_ops, e_inval); 2739 if (m->num_ops > ARRAY_SIZE(m->outdata_len)) 2740 goto e_inval; 2741 2742 ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), 2743 e_inval); 2744 for (i = 0; i < m->num_ops; i++) { 2745 struct ceph_osd_op *op = p; 2746 2747 m->outdata_len[i] = le32_to_cpu(op->payload_len); 2748 p += sizeof(*op); 2749 } 2750 2751 ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); 2752 for (i = 0; i < m->num_ops; i++) 2753 ceph_decode_32_safe(&p, end, m->rval[i], e_inval); 2754 2755 if (version >= 5) { 2756 ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); 2757 memcpy(&m->replay_version, p, sizeof(m->replay_version)); 2758 p += sizeof(m->replay_version); 2759 ceph_decode_64_safe(&p, end, m->user_version, e_inval); 2760 } else { 2761 m->replay_version = bad_replay_version; /* struct */ 2762 m->user_version = le64_to_cpu(m->replay_version.version); 2763 } 2764 2765 if (version >= 6) { 2766 if (version >= 7) 2767 ceph_decode_8_safe(&p, end, decode_redir, e_inval); 2768 else 2769 decode_redir = 1; 2770 } else { 2771 decode_redir = 0; 2772 } 2773 2774 if (decode_redir) { 2775 ret = ceph_redirect_decode(&p, end, &m->redirect); 2776 if (ret) 2777 return ret; 2778 } else { 2779 ceph_oloc_init(&m->redirect.oloc); 2780 } 2781 2782 return 0; 2783 2784 e_inval: 2785 return -EINVAL; 2786 } 2787 2788 /* 2789 * We are done with @req if 2790 * - @m is a safe reply, or 2791 * - @m is an unsafe reply and we didn't want a safe one 2792 */ 2793 static bool done_request(const struct ceph_osd_request *req, 2794 const struct MOSDOpReply *m) 2795 { 2796 return (m->result < 0 || 2797 (m->flags & CEPH_OSD_FLAG_ONDISK) || 2798 !(req->r_flags & CEPH_OSD_FLAG_ONDISK)); 2799 } 2800 2801 /* 2802 * handle osd op reply. either call the callback if it is specified, 2803 * or do the completion to wake up the waiting thread. 2804 * 2805 * ->r_unsafe_callback is set? yes no 2806 * 2807 * first reply is OK (needed r_cb/r_completion, r_cb/r_completion, 2808 * any or needed/got safe) r_done_completion r_done_completion 2809 * 2810 * first reply is unsafe r_unsafe_cb(true) (nothing) 2811 * 2812 * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion, 2813 * r_done_completion r_done_completion 2814 */ 2815 static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg) 2816 { 2817 struct ceph_osd_client *osdc = osd->o_osdc; 2818 struct ceph_osd_request *req; 2819 struct MOSDOpReply m; 2820 u64 tid = le64_to_cpu(msg->hdr.tid); 2821 u32 data_len = 0; 2822 bool already_acked; 2823 int ret; 2824 int i; 2825 2826 dout("%s msg %p tid %llu\n", __func__, msg, tid); 2827 2828 down_read(&osdc->lock); 2829 if (!osd_registered(osd)) { 2830 dout("%s osd%d unknown\n", __func__, osd->o_osd); 2831 goto out_unlock_osdc; 2832 } 2833 WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); 2834 2835 mutex_lock(&osd->lock); 2836 req = lookup_request(&osd->o_requests, tid); 2837 if (!req) { 2838 dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid); 2839 goto out_unlock_session; 2840 } 2841 2842 m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns; 2843 ret = decode_MOSDOpReply(msg, &m); 2844 m.redirect.oloc.pool_ns = NULL; 2845 if (ret) { 2846 pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", 2847 req->r_tid, ret); 2848 ceph_msg_dump(msg); 2849 goto fail_request; 2850 } 2851 dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", 2852 __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, 2853 m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), 2854 le64_to_cpu(m.replay_version.version), m.user_version); 2855 2856 if (m.retry_attempt >= 0) { 2857 if (m.retry_attempt != req->r_attempts - 1) { 2858 dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", 2859 req, req->r_tid, m.retry_attempt, 2860 req->r_attempts - 1); 2861 goto out_unlock_session; 2862 } 2863 } else { 2864 WARN_ON(1); /* MOSDOpReply v4 is assumed */ 2865 } 2866 2867 if (!ceph_oloc_empty(&m.redirect.oloc)) { 2868 dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, 2869 m.redirect.oloc.pool); 2870 unlink_request(osd, req); 2871 mutex_unlock(&osd->lock); 2872 2873 /* 2874 * Not ceph_oloc_copy() - changing pool_ns is not 2875 * supported. 2876 */ 2877 req->r_t.target_oloc.pool = m.redirect.oloc.pool; 2878 req->r_flags |= CEPH_OSD_FLAG_REDIRECTED; 2879 req->r_tid = 0; 2880 __submit_request(req, false); 2881 goto out_unlock_osdc; 2882 } 2883 2884 if (m.num_ops != req->r_num_ops) { 2885 pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, 2886 req->r_num_ops, req->r_tid); 2887 goto fail_request; 2888 } 2889 for (i = 0; i < req->r_num_ops; i++) { 2890 dout(" req %p tid %llu op %d rval %d len %u\n", req, 2891 req->r_tid, i, m.rval[i], m.outdata_len[i]); 2892 req->r_ops[i].rval = m.rval[i]; 2893 req->r_ops[i].outdata_len = m.outdata_len[i]; 2894 data_len += m.outdata_len[i]; 2895 } 2896 if (data_len != le32_to_cpu(msg->hdr.data_len)) { 2897 pr_err("sum of lens %u != %u for tid %llu\n", data_len, 2898 le32_to_cpu(msg->hdr.data_len), req->r_tid); 2899 goto fail_request; 2900 } 2901 dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__, 2902 req, req->r_tid, req->r_got_reply, m.result, data_len); 2903 2904 already_acked = req->r_got_reply; 2905 if (!already_acked) { 2906 req->r_result = m.result ?: data_len; 2907 req->r_replay_version = m.replay_version; /* struct */ 2908 req->r_got_reply = true; 2909 } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) { 2910 dout("req %p tid %llu dup ack\n", req, req->r_tid); 2911 goto out_unlock_session; 2912 } 2913 2914 if (done_request(req, &m)) { 2915 finish_request(req); 2916 if (req->r_linger) { 2917 WARN_ON(req->r_unsafe_callback); 2918 dout("req %p tid %llu cb (locked)\n", req, req->r_tid); 2919 __complete_request(req); 2920 } 2921 } 2922 2923 mutex_unlock(&osd->lock); 2924 up_read(&osdc->lock); 2925 2926 if (done_request(req, &m)) { 2927 if (already_acked && req->r_unsafe_callback) { 2928 dout("req %p tid %llu safe-cb\n", req, req->r_tid); 2929 req->r_unsafe_callback(req, false); 2930 } else if (!req->r_linger) { 2931 dout("req %p tid %llu cb\n", req, req->r_tid); 2932 __complete_request(req); 2933 } 2934 complete_all(&req->r_done_completion); 2935 ceph_osdc_put_request(req); 2936 } else { 2937 if (req->r_unsafe_callback) { 2938 dout("req %p tid %llu unsafe-cb\n", req, req->r_tid); 2939 req->r_unsafe_callback(req, true); 2940 } else { 2941 WARN_ON(1); 2942 } 2943 } 2944 2945 return; 2946 2947 fail_request: 2948 complete_request(req, -EIO); 2949 out_unlock_session: 2950 mutex_unlock(&osd->lock); 2951 out_unlock_osdc: 2952 up_read(&osdc->lock); 2953 } 2954 2955 static void set_pool_was_full(struct ceph_osd_client *osdc) 2956 { 2957 struct rb_node *n; 2958 2959 for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) { 2960 struct ceph_pg_pool_info *pi = 2961 rb_entry(n, struct ceph_pg_pool_info, node); 2962 2963 pi->was_full = __pool_full(pi); 2964 } 2965 } 2966 2967 static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id) 2968 { 2969 struct ceph_pg_pool_info *pi; 2970 2971 pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id); 2972 if (!pi) 2973 return false; 2974 2975 return pi->was_full && !__pool_full(pi); 2976 } 2977 2978 static enum calc_target_result 2979 recalc_linger_target(struct ceph_osd_linger_request *lreq) 2980 { 2981 struct ceph_osd_client *osdc = lreq->osdc; 2982 enum calc_target_result ct_res; 2983 2984 ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true); 2985 if (ct_res == CALC_TARGET_NEED_RESEND) { 2986 struct ceph_osd *osd; 2987 2988 osd = lookup_create_osd(osdc, lreq->t.osd, true); 2989 if (osd != lreq->osd) { 2990 unlink_linger(lreq->osd, lreq); 2991 link_linger(osd, lreq); 2992 } 2993 } 2994 2995 return ct_res; 2996 } 2997 2998 /* 2999 * Requeue requests whose mapping to an OSD has changed. 3000 */ 3001 static void scan_requests(struct ceph_osd *osd, 3002 bool force_resend, 3003 bool cleared_full, 3004 bool check_pool_cleared_full, 3005 struct rb_root *need_resend, 3006 struct list_head *need_resend_linger) 3007 { 3008 struct ceph_osd_client *osdc = osd->o_osdc; 3009 struct rb_node *n; 3010 bool force_resend_writes; 3011 3012 for (n = rb_first(&osd->o_linger_requests); n; ) { 3013 struct ceph_osd_linger_request *lreq = 3014 rb_entry(n, struct ceph_osd_linger_request, node); 3015 enum calc_target_result ct_res; 3016 3017 n = rb_next(n); /* recalc_linger_target() */ 3018 3019 dout("%s lreq %p linger_id %llu\n", __func__, lreq, 3020 lreq->linger_id); 3021 ct_res = recalc_linger_target(lreq); 3022 switch (ct_res) { 3023 case CALC_TARGET_NO_ACTION: 3024 force_resend_writes = cleared_full || 3025 (check_pool_cleared_full && 3026 pool_cleared_full(osdc, lreq->t.base_oloc.pool)); 3027 if (!force_resend && !force_resend_writes) 3028 break; 3029 3030 /* fall through */ 3031 case CALC_TARGET_NEED_RESEND: 3032 cancel_linger_map_check(lreq); 3033 /* 3034 * scan_requests() for the previous epoch(s) 3035 * may have already added it to the list, since 3036 * it's not unlinked here. 3037 */ 3038 if (list_empty(&lreq->scan_item)) 3039 list_add_tail(&lreq->scan_item, need_resend_linger); 3040 break; 3041 case CALC_TARGET_POOL_DNE: 3042 check_linger_pool_dne(lreq); 3043 break; 3044 } 3045 } 3046 3047 for (n = rb_first(&osd->o_requests); n; ) { 3048 struct ceph_osd_request *req = 3049 rb_entry(n, struct ceph_osd_request, r_node); 3050 enum calc_target_result ct_res; 3051 3052 n = rb_next(n); /* unlink_request(), check_pool_dne() */ 3053 3054 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3055 ct_res = calc_target(osdc, &req->r_t, 3056 &req->r_last_force_resend, false); 3057 switch (ct_res) { 3058 case CALC_TARGET_NO_ACTION: 3059 force_resend_writes = cleared_full || 3060 (check_pool_cleared_full && 3061 pool_cleared_full(osdc, req->r_t.base_oloc.pool)); 3062 if (!force_resend && 3063 (!(req->r_flags & CEPH_OSD_FLAG_WRITE) || 3064 !force_resend_writes)) 3065 break; 3066 3067 /* fall through */ 3068 case CALC_TARGET_NEED_RESEND: 3069 cancel_map_check(req); 3070 unlink_request(osd, req); 3071 insert_request(need_resend, req); 3072 break; 3073 case CALC_TARGET_POOL_DNE: 3074 check_pool_dne(req); 3075 break; 3076 } 3077 } 3078 } 3079 3080 static int handle_one_map(struct ceph_osd_client *osdc, 3081 void *p, void *end, bool incremental, 3082 struct rb_root *need_resend, 3083 struct list_head *need_resend_linger) 3084 { 3085 struct ceph_osdmap *newmap; 3086 struct rb_node *n; 3087 bool skipped_map = false; 3088 bool was_full; 3089 3090 was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3091 set_pool_was_full(osdc); 3092 3093 if (incremental) 3094 newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); 3095 else 3096 newmap = ceph_osdmap_decode(&p, end); 3097 if (IS_ERR(newmap)) 3098 return PTR_ERR(newmap); 3099 3100 if (newmap != osdc->osdmap) { 3101 /* 3102 * Preserve ->was_full before destroying the old map. 3103 * For pools that weren't in the old map, ->was_full 3104 * should be false. 3105 */ 3106 for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { 3107 struct ceph_pg_pool_info *pi = 3108 rb_entry(n, struct ceph_pg_pool_info, node); 3109 struct ceph_pg_pool_info *old_pi; 3110 3111 old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); 3112 if (old_pi) 3113 pi->was_full = old_pi->was_full; 3114 else 3115 WARN_ON(pi->was_full); 3116 } 3117 3118 if (osdc->osdmap->epoch && 3119 osdc->osdmap->epoch + 1 < newmap->epoch) { 3120 WARN_ON(incremental); 3121 skipped_map = true; 3122 } 3123 3124 ceph_osdmap_destroy(osdc->osdmap); 3125 osdc->osdmap = newmap; 3126 } 3127 3128 was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL); 3129 scan_requests(&osdc->homeless_osd, skipped_map, was_full, true, 3130 need_resend, need_resend_linger); 3131 3132 for (n = rb_first(&osdc->osds); n; ) { 3133 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3134 3135 n = rb_next(n); /* close_osd() */ 3136 3137 scan_requests(osd, skipped_map, was_full, true, need_resend, 3138 need_resend_linger); 3139 if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || 3140 memcmp(&osd->o_con.peer_addr, 3141 ceph_osd_addr(osdc->osdmap, osd->o_osd), 3142 sizeof(struct ceph_entity_addr))) 3143 close_osd(osd); 3144 } 3145 3146 return 0; 3147 } 3148 3149 static void kick_requests(struct ceph_osd_client *osdc, 3150 struct rb_root *need_resend, 3151 struct list_head *need_resend_linger) 3152 { 3153 struct ceph_osd_linger_request *lreq, *nlreq; 3154 struct rb_node *n; 3155 3156 for (n = rb_first(need_resend); n; ) { 3157 struct ceph_osd_request *req = 3158 rb_entry(n, struct ceph_osd_request, r_node); 3159 struct ceph_osd *osd; 3160 3161 n = rb_next(n); 3162 erase_request(need_resend, req); /* before link_request() */ 3163 3164 WARN_ON(req->r_osd); 3165 calc_target(osdc, &req->r_t, NULL, false); 3166 osd = lookup_create_osd(osdc, req->r_t.osd, true); 3167 link_request(osd, req); 3168 if (!req->r_linger) { 3169 if (!osd_homeless(osd) && !req->r_t.paused) 3170 send_request(req); 3171 } else { 3172 cancel_linger_request(req); 3173 } 3174 } 3175 3176 list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) { 3177 if (!osd_homeless(lreq->osd)) 3178 send_linger(lreq); 3179 3180 list_del_init(&lreq->scan_item); 3181 } 3182 } 3183 3184 /* 3185 * Process updated osd map. 3186 * 3187 * The message contains any number of incremental and full maps, normally 3188 * indicating some sort of topology change in the cluster. Kick requests 3189 * off to different OSDs as needed. 3190 */ 3191 void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) 3192 { 3193 void *p = msg->front.iov_base; 3194 void *const end = p + msg->front.iov_len; 3195 u32 nr_maps, maplen; 3196 u32 epoch; 3197 struct ceph_fsid fsid; 3198 struct rb_root need_resend = RB_ROOT; 3199 LIST_HEAD(need_resend_linger); 3200 bool handled_incremental = false; 3201 bool was_pauserd, was_pausewr; 3202 bool pauserd, pausewr; 3203 int err; 3204 3205 dout("%s have %u\n", __func__, osdc->osdmap->epoch); 3206 down_write(&osdc->lock); 3207 3208 /* verify fsid */ 3209 ceph_decode_need(&p, end, sizeof(fsid), bad); 3210 ceph_decode_copy(&p, &fsid, sizeof(fsid)); 3211 if (ceph_check_fsid(osdc->client, &fsid) < 0) 3212 goto bad; 3213 3214 was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3215 was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3216 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3217 have_pool_full(osdc); 3218 3219 /* incremental maps */ 3220 ceph_decode_32_safe(&p, end, nr_maps, bad); 3221 dout(" %d inc maps\n", nr_maps); 3222 while (nr_maps > 0) { 3223 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3224 epoch = ceph_decode_32(&p); 3225 maplen = ceph_decode_32(&p); 3226 ceph_decode_need(&p, end, maplen, bad); 3227 if (osdc->osdmap->epoch && 3228 osdc->osdmap->epoch + 1 == epoch) { 3229 dout("applying incremental map %u len %d\n", 3230 epoch, maplen); 3231 err = handle_one_map(osdc, p, p + maplen, true, 3232 &need_resend, &need_resend_linger); 3233 if (err) 3234 goto bad; 3235 handled_incremental = true; 3236 } else { 3237 dout("ignoring incremental map %u len %d\n", 3238 epoch, maplen); 3239 } 3240 p += maplen; 3241 nr_maps--; 3242 } 3243 if (handled_incremental) 3244 goto done; 3245 3246 /* full maps */ 3247 ceph_decode_32_safe(&p, end, nr_maps, bad); 3248 dout(" %d full maps\n", nr_maps); 3249 while (nr_maps) { 3250 ceph_decode_need(&p, end, 2*sizeof(u32), bad); 3251 epoch = ceph_decode_32(&p); 3252 maplen = ceph_decode_32(&p); 3253 ceph_decode_need(&p, end, maplen, bad); 3254 if (nr_maps > 1) { 3255 dout("skipping non-latest full map %u len %d\n", 3256 epoch, maplen); 3257 } else if (osdc->osdmap->epoch >= epoch) { 3258 dout("skipping full map %u len %d, " 3259 "older than our %u\n", epoch, maplen, 3260 osdc->osdmap->epoch); 3261 } else { 3262 dout("taking full map %u len %d\n", epoch, maplen); 3263 err = handle_one_map(osdc, p, p + maplen, false, 3264 &need_resend, &need_resend_linger); 3265 if (err) 3266 goto bad; 3267 } 3268 p += maplen; 3269 nr_maps--; 3270 } 3271 3272 done: 3273 /* 3274 * subscribe to subsequent osdmap updates if full to ensure 3275 * we find out when we are no longer full and stop returning 3276 * ENOSPC. 3277 */ 3278 pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD); 3279 pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) || 3280 ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || 3281 have_pool_full(osdc); 3282 if (was_pauserd || was_pausewr || pauserd || pausewr) 3283 maybe_request_map(osdc); 3284 3285 kick_requests(osdc, &need_resend, &need_resend_linger); 3286 3287 ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, 3288 osdc->osdmap->epoch); 3289 up_write(&osdc->lock); 3290 wake_up_all(&osdc->client->auth_wq); 3291 return; 3292 3293 bad: 3294 pr_err("osdc handle_map corrupt msg\n"); 3295 ceph_msg_dump(msg); 3296 up_write(&osdc->lock); 3297 } 3298 3299 /* 3300 * Resubmit requests pending on the given osd. 3301 */ 3302 static void kick_osd_requests(struct ceph_osd *osd) 3303 { 3304 struct rb_node *n; 3305 3306 for (n = rb_first(&osd->o_requests); n; ) { 3307 struct ceph_osd_request *req = 3308 rb_entry(n, struct ceph_osd_request, r_node); 3309 3310 n = rb_next(n); /* cancel_linger_request() */ 3311 3312 if (!req->r_linger) { 3313 if (!req->r_t.paused) 3314 send_request(req); 3315 } else { 3316 cancel_linger_request(req); 3317 } 3318 } 3319 for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) { 3320 struct ceph_osd_linger_request *lreq = 3321 rb_entry(n, struct ceph_osd_linger_request, node); 3322 3323 send_linger(lreq); 3324 } 3325 } 3326 3327 /* 3328 * If the osd connection drops, we need to resubmit all requests. 3329 */ 3330 static void osd_fault(struct ceph_connection *con) 3331 { 3332 struct ceph_osd *osd = con->private; 3333 struct ceph_osd_client *osdc = osd->o_osdc; 3334 3335 dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd); 3336 3337 down_write(&osdc->lock); 3338 if (!osd_registered(osd)) { 3339 dout("%s osd%d unknown\n", __func__, osd->o_osd); 3340 goto out_unlock; 3341 } 3342 3343 if (!reopen_osd(osd)) 3344 kick_osd_requests(osd); 3345 maybe_request_map(osdc); 3346 3347 out_unlock: 3348 up_write(&osdc->lock); 3349 } 3350 3351 /* 3352 * Process osd watch notifications 3353 */ 3354 static void handle_watch_notify(struct ceph_osd_client *osdc, 3355 struct ceph_msg *msg) 3356 { 3357 void *p = msg->front.iov_base; 3358 void *const end = p + msg->front.iov_len; 3359 struct ceph_osd_linger_request *lreq; 3360 struct linger_work *lwork; 3361 u8 proto_ver, opcode; 3362 u64 cookie, notify_id; 3363 u64 notifier_id = 0; 3364 s32 return_code = 0; 3365 void *payload = NULL; 3366 u32 payload_len = 0; 3367 3368 ceph_decode_8_safe(&p, end, proto_ver, bad); 3369 ceph_decode_8_safe(&p, end, opcode, bad); 3370 ceph_decode_64_safe(&p, end, cookie, bad); 3371 p += 8; /* skip ver */ 3372 ceph_decode_64_safe(&p, end, notify_id, bad); 3373 3374 if (proto_ver >= 1) { 3375 ceph_decode_32_safe(&p, end, payload_len, bad); 3376 ceph_decode_need(&p, end, payload_len, bad); 3377 payload = p; 3378 p += payload_len; 3379 } 3380 3381 if (le16_to_cpu(msg->hdr.version) >= 2) 3382 ceph_decode_32_safe(&p, end, return_code, bad); 3383 3384 if (le16_to_cpu(msg->hdr.version) >= 3) 3385 ceph_decode_64_safe(&p, end, notifier_id, bad); 3386 3387 down_read(&osdc->lock); 3388 lreq = lookup_linger_osdc(&osdc->linger_requests, cookie); 3389 if (!lreq) { 3390 dout("%s opcode %d cookie %llu dne\n", __func__, opcode, 3391 cookie); 3392 goto out_unlock_osdc; 3393 } 3394 3395 mutex_lock(&lreq->lock); 3396 dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__, 3397 opcode, cookie, lreq, lreq->is_watch); 3398 if (opcode == CEPH_WATCH_EVENT_DISCONNECT) { 3399 if (!lreq->last_error) { 3400 lreq->last_error = -ENOTCONN; 3401 queue_watch_error(lreq); 3402 } 3403 } else if (!lreq->is_watch) { 3404 /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */ 3405 if (lreq->notify_id && lreq->notify_id != notify_id) { 3406 dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq, 3407 lreq->notify_id, notify_id); 3408 } else if (!completion_done(&lreq->notify_finish_wait)) { 3409 struct ceph_msg_data *data = 3410 list_first_entry_or_null(&msg->data, 3411 struct ceph_msg_data, 3412 links); 3413 3414 if (data) { 3415 if (lreq->preply_pages) { 3416 WARN_ON(data->type != 3417 CEPH_MSG_DATA_PAGES); 3418 *lreq->preply_pages = data->pages; 3419 *lreq->preply_len = data->length; 3420 } else { 3421 ceph_release_page_vector(data->pages, 3422 calc_pages_for(0, data->length)); 3423 } 3424 } 3425 lreq->notify_finish_error = return_code; 3426 complete_all(&lreq->notify_finish_wait); 3427 } 3428 } else { 3429 /* CEPH_WATCH_EVENT_NOTIFY */ 3430 lwork = lwork_alloc(lreq, do_watch_notify); 3431 if (!lwork) { 3432 pr_err("failed to allocate notify-lwork\n"); 3433 goto out_unlock_lreq; 3434 } 3435 3436 lwork->notify.notify_id = notify_id; 3437 lwork->notify.notifier_id = notifier_id; 3438 lwork->notify.payload = payload; 3439 lwork->notify.payload_len = payload_len; 3440 lwork->notify.msg = ceph_msg_get(msg); 3441 lwork_queue(lwork); 3442 } 3443 3444 out_unlock_lreq: 3445 mutex_unlock(&lreq->lock); 3446 out_unlock_osdc: 3447 up_read(&osdc->lock); 3448 return; 3449 3450 bad: 3451 pr_err("osdc handle_watch_notify corrupt msg\n"); 3452 } 3453 3454 /* 3455 * Register request, send initial attempt. 3456 */ 3457 int ceph_osdc_start_request(struct ceph_osd_client *osdc, 3458 struct ceph_osd_request *req, 3459 bool nofail) 3460 { 3461 down_read(&osdc->lock); 3462 submit_request(req, false); 3463 up_read(&osdc->lock); 3464 3465 return 0; 3466 } 3467 EXPORT_SYMBOL(ceph_osdc_start_request); 3468 3469 /* 3470 * Unregister a registered request. The request is not completed: 3471 * ->r_result isn't set and __complete_request() isn't called. 3472 */ 3473 void ceph_osdc_cancel_request(struct ceph_osd_request *req) 3474 { 3475 struct ceph_osd_client *osdc = req->r_osdc; 3476 3477 down_write(&osdc->lock); 3478 if (req->r_osd) 3479 cancel_request(req); 3480 up_write(&osdc->lock); 3481 } 3482 EXPORT_SYMBOL(ceph_osdc_cancel_request); 3483 3484 /* 3485 * @timeout: in jiffies, 0 means "wait forever" 3486 */ 3487 static int wait_request_timeout(struct ceph_osd_request *req, 3488 unsigned long timeout) 3489 { 3490 long left; 3491 3492 dout("%s req %p tid %llu\n", __func__, req, req->r_tid); 3493 left = wait_for_completion_killable_timeout(&req->r_completion, 3494 ceph_timeout_jiffies(timeout)); 3495 if (left <= 0) { 3496 left = left ?: -ETIMEDOUT; 3497 ceph_osdc_cancel_request(req); 3498 } else { 3499 left = req->r_result; /* completed */ 3500 } 3501 3502 return left; 3503 } 3504 3505 /* 3506 * wait for a request to complete 3507 */ 3508 int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 3509 struct ceph_osd_request *req) 3510 { 3511 return wait_request_timeout(req, 0); 3512 } 3513 EXPORT_SYMBOL(ceph_osdc_wait_request); 3514 3515 /* 3516 * sync - wait for all in-flight requests to flush. avoid starvation. 3517 */ 3518 void ceph_osdc_sync(struct ceph_osd_client *osdc) 3519 { 3520 struct rb_node *n, *p; 3521 u64 last_tid = atomic64_read(&osdc->last_tid); 3522 3523 again: 3524 down_read(&osdc->lock); 3525 for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { 3526 struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 3527 3528 mutex_lock(&osd->lock); 3529 for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) { 3530 struct ceph_osd_request *req = 3531 rb_entry(p, struct ceph_osd_request, r_node); 3532 3533 if (req->r_tid > last_tid) 3534 break; 3535 3536 if (!(req->r_flags & CEPH_OSD_FLAG_WRITE)) 3537 continue; 3538 3539 ceph_osdc_get_request(req); 3540 mutex_unlock(&osd->lock); 3541 up_read(&osdc->lock); 3542 dout("%s waiting on req %p tid %llu last_tid %llu\n", 3543 __func__, req, req->r_tid, last_tid); 3544 wait_for_completion(&req->r_done_completion); 3545 ceph_osdc_put_request(req); 3546 goto again; 3547 } 3548 3549 mutex_unlock(&osd->lock); 3550 } 3551 3552 up_read(&osdc->lock); 3553 dout("%s done last_tid %llu\n", __func__, last_tid); 3554 } 3555 EXPORT_SYMBOL(ceph_osdc_sync); 3556 3557 static struct ceph_osd_request * 3558 alloc_linger_request(struct ceph_osd_linger_request *lreq) 3559 { 3560 struct ceph_osd_request *req; 3561 3562 req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO); 3563 if (!req) 3564 return NULL; 3565 3566 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3567 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3568 3569 if (ceph_osdc_alloc_messages(req, GFP_NOIO)) { 3570 ceph_osdc_put_request(req); 3571 return NULL; 3572 } 3573 3574 return req; 3575 } 3576 3577 /* 3578 * Returns a handle, caller owns a ref. 3579 */ 3580 struct ceph_osd_linger_request * 3581 ceph_osdc_watch(struct ceph_osd_client *osdc, 3582 struct ceph_object_id *oid, 3583 struct ceph_object_locator *oloc, 3584 rados_watchcb2_t wcb, 3585 rados_watcherrcb_t errcb, 3586 void *data) 3587 { 3588 struct ceph_osd_linger_request *lreq; 3589 int ret; 3590 3591 lreq = linger_alloc(osdc); 3592 if (!lreq) 3593 return ERR_PTR(-ENOMEM); 3594 3595 lreq->is_watch = true; 3596 lreq->wcb = wcb; 3597 lreq->errcb = errcb; 3598 lreq->data = data; 3599 lreq->watch_valid_thru = jiffies; 3600 3601 ceph_oid_copy(&lreq->t.base_oid, oid); 3602 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3603 lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3604 lreq->mtime = CURRENT_TIME; 3605 3606 lreq->reg_req = alloc_linger_request(lreq); 3607 if (!lreq->reg_req) { 3608 ret = -ENOMEM; 3609 goto err_put_lreq; 3610 } 3611 3612 lreq->ping_req = alloc_linger_request(lreq); 3613 if (!lreq->ping_req) { 3614 ret = -ENOMEM; 3615 goto err_put_lreq; 3616 } 3617 3618 down_write(&osdc->lock); 3619 linger_register(lreq); /* before osd_req_op_* */ 3620 osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id, 3621 CEPH_OSD_WATCH_OP_WATCH); 3622 osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id, 3623 CEPH_OSD_WATCH_OP_PING); 3624 linger_submit(lreq); 3625 up_write(&osdc->lock); 3626 3627 ret = linger_reg_commit_wait(lreq); 3628 if (ret) { 3629 linger_cancel(lreq); 3630 goto err_put_lreq; 3631 } 3632 3633 return lreq; 3634 3635 err_put_lreq: 3636 linger_put(lreq); 3637 return ERR_PTR(ret); 3638 } 3639 EXPORT_SYMBOL(ceph_osdc_watch); 3640 3641 /* 3642 * Releases a ref. 3643 * 3644 * Times out after mount_timeout to preserve rbd unmap behaviour 3645 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap 3646 * with mount_timeout"). 3647 */ 3648 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 3649 struct ceph_osd_linger_request *lreq) 3650 { 3651 struct ceph_options *opts = osdc->client->options; 3652 struct ceph_osd_request *req; 3653 int ret; 3654 3655 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3656 if (!req) 3657 return -ENOMEM; 3658 3659 ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid); 3660 ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc); 3661 req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK; 3662 req->r_mtime = CURRENT_TIME; 3663 osd_req_op_watch_init(req, 0, lreq->linger_id, 3664 CEPH_OSD_WATCH_OP_UNWATCH); 3665 3666 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3667 if (ret) 3668 goto out_put_req; 3669 3670 ceph_osdc_start_request(osdc, req, false); 3671 linger_cancel(lreq); 3672 linger_put(lreq); 3673 ret = wait_request_timeout(req, opts->mount_timeout); 3674 3675 out_put_req: 3676 ceph_osdc_put_request(req); 3677 return ret; 3678 } 3679 EXPORT_SYMBOL(ceph_osdc_unwatch); 3680 3681 static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which, 3682 u64 notify_id, u64 cookie, void *payload, 3683 size_t payload_len) 3684 { 3685 struct ceph_osd_req_op *op; 3686 struct ceph_pagelist *pl; 3687 int ret; 3688 3689 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0); 3690 3691 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3692 if (!pl) 3693 return -ENOMEM; 3694 3695 ceph_pagelist_init(pl); 3696 ret = ceph_pagelist_encode_64(pl, notify_id); 3697 ret |= ceph_pagelist_encode_64(pl, cookie); 3698 if (payload) { 3699 ret |= ceph_pagelist_encode_32(pl, payload_len); 3700 ret |= ceph_pagelist_append(pl, payload, payload_len); 3701 } else { 3702 ret |= ceph_pagelist_encode_32(pl, 0); 3703 } 3704 if (ret) { 3705 ceph_pagelist_release(pl); 3706 return -ENOMEM; 3707 } 3708 3709 ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl); 3710 op->indata_len = pl->length; 3711 return 0; 3712 } 3713 3714 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 3715 struct ceph_object_id *oid, 3716 struct ceph_object_locator *oloc, 3717 u64 notify_id, 3718 u64 cookie, 3719 void *payload, 3720 size_t payload_len) 3721 { 3722 struct ceph_osd_request *req; 3723 int ret; 3724 3725 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3726 if (!req) 3727 return -ENOMEM; 3728 3729 ceph_oid_copy(&req->r_base_oid, oid); 3730 ceph_oloc_copy(&req->r_base_oloc, oloc); 3731 req->r_flags = CEPH_OSD_FLAG_READ; 3732 3733 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3734 if (ret) 3735 goto out_put_req; 3736 3737 ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, 3738 payload_len); 3739 if (ret) 3740 goto out_put_req; 3741 3742 ceph_osdc_start_request(osdc, req, false); 3743 ret = ceph_osdc_wait_request(osdc, req); 3744 3745 out_put_req: 3746 ceph_osdc_put_request(req); 3747 return ret; 3748 } 3749 EXPORT_SYMBOL(ceph_osdc_notify_ack); 3750 3751 static int osd_req_op_notify_init(struct ceph_osd_request *req, int which, 3752 u64 cookie, u32 prot_ver, u32 timeout, 3753 void *payload, size_t payload_len) 3754 { 3755 struct ceph_osd_req_op *op; 3756 struct ceph_pagelist *pl; 3757 int ret; 3758 3759 op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); 3760 op->notify.cookie = cookie; 3761 3762 pl = kmalloc(sizeof(*pl), GFP_NOIO); 3763 if (!pl) 3764 return -ENOMEM; 3765 3766 ceph_pagelist_init(pl); 3767 ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */ 3768 ret |= ceph_pagelist_encode_32(pl, timeout); 3769 ret |= ceph_pagelist_encode_32(pl, payload_len); 3770 ret |= ceph_pagelist_append(pl, payload, payload_len); 3771 if (ret) { 3772 ceph_pagelist_release(pl); 3773 return -ENOMEM; 3774 } 3775 3776 ceph_osd_data_pagelist_init(&op->notify.request_data, pl); 3777 op->indata_len = pl->length; 3778 return 0; 3779 } 3780 3781 /* 3782 * @timeout: in seconds 3783 * 3784 * @preply_{pages,len} are initialized both on success and error. 3785 * The caller is responsible for: 3786 * 3787 * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len)) 3788 */ 3789 int ceph_osdc_notify(struct ceph_osd_client *osdc, 3790 struct ceph_object_id *oid, 3791 struct ceph_object_locator *oloc, 3792 void *payload, 3793 size_t payload_len, 3794 u32 timeout, 3795 struct page ***preply_pages, 3796 size_t *preply_len) 3797 { 3798 struct ceph_osd_linger_request *lreq; 3799 struct page **pages; 3800 int ret; 3801 3802 WARN_ON(!timeout); 3803 if (preply_pages) { 3804 *preply_pages = NULL; 3805 *preply_len = 0; 3806 } 3807 3808 lreq = linger_alloc(osdc); 3809 if (!lreq) 3810 return -ENOMEM; 3811 3812 lreq->preply_pages = preply_pages; 3813 lreq->preply_len = preply_len; 3814 3815 ceph_oid_copy(&lreq->t.base_oid, oid); 3816 ceph_oloc_copy(&lreq->t.base_oloc, oloc); 3817 lreq->t.flags = CEPH_OSD_FLAG_READ; 3818 3819 lreq->reg_req = alloc_linger_request(lreq); 3820 if (!lreq->reg_req) { 3821 ret = -ENOMEM; 3822 goto out_put_lreq; 3823 } 3824 3825 /* for notify_id */ 3826 pages = ceph_alloc_page_vector(1, GFP_NOIO); 3827 if (IS_ERR(pages)) { 3828 ret = PTR_ERR(pages); 3829 goto out_put_lreq; 3830 } 3831 3832 down_write(&osdc->lock); 3833 linger_register(lreq); /* before osd_req_op_* */ 3834 ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1, 3835 timeout, payload, payload_len); 3836 if (ret) { 3837 linger_unregister(lreq); 3838 up_write(&osdc->lock); 3839 ceph_release_page_vector(pages, 1); 3840 goto out_put_lreq; 3841 } 3842 ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify, 3843 response_data), 3844 pages, PAGE_SIZE, 0, false, true); 3845 linger_submit(lreq); 3846 up_write(&osdc->lock); 3847 3848 ret = linger_reg_commit_wait(lreq); 3849 if (!ret) 3850 ret = linger_notify_finish_wait(lreq); 3851 else 3852 dout("lreq %p failed to initiate notify %d\n", lreq, ret); 3853 3854 linger_cancel(lreq); 3855 out_put_lreq: 3856 linger_put(lreq); 3857 return ret; 3858 } 3859 EXPORT_SYMBOL(ceph_osdc_notify); 3860 3861 /* 3862 * Return the number of milliseconds since the watch was last 3863 * confirmed, or an error. If there is an error, the watch is no 3864 * longer valid, and should be destroyed with ceph_osdc_unwatch(). 3865 */ 3866 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 3867 struct ceph_osd_linger_request *lreq) 3868 { 3869 unsigned long stamp, age; 3870 int ret; 3871 3872 down_read(&osdc->lock); 3873 mutex_lock(&lreq->lock); 3874 stamp = lreq->watch_valid_thru; 3875 if (!list_empty(&lreq->pending_lworks)) { 3876 struct linger_work *lwork = 3877 list_first_entry(&lreq->pending_lworks, 3878 struct linger_work, 3879 pending_item); 3880 3881 if (time_before(lwork->queued_stamp, stamp)) 3882 stamp = lwork->queued_stamp; 3883 } 3884 age = jiffies - stamp; 3885 dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__, 3886 lreq, lreq->linger_id, age, lreq->last_error); 3887 /* we are truncating to msecs, so return a safe upper bound */ 3888 ret = lreq->last_error ?: 1 + jiffies_to_msecs(age); 3889 3890 mutex_unlock(&lreq->lock); 3891 up_read(&osdc->lock); 3892 return ret; 3893 } 3894 3895 static int decode_watcher(void **p, void *end, struct ceph_watch_item *item) 3896 { 3897 u8 struct_v; 3898 u32 struct_len; 3899 int ret; 3900 3901 ret = ceph_start_decoding(p, end, 2, "watch_item_t", 3902 &struct_v, &struct_len); 3903 if (ret) 3904 return ret; 3905 3906 ceph_decode_copy(p, &item->name, sizeof(item->name)); 3907 item->cookie = ceph_decode_64(p); 3908 *p += 4; /* skip timeout_seconds */ 3909 if (struct_v >= 2) { 3910 ceph_decode_copy(p, &item->addr, sizeof(item->addr)); 3911 ceph_decode_addr(&item->addr); 3912 } 3913 3914 dout("%s %s%llu cookie %llu addr %s\n", __func__, 3915 ENTITY_NAME(item->name), item->cookie, 3916 ceph_pr_addr(&item->addr.in_addr)); 3917 return 0; 3918 } 3919 3920 static int decode_watchers(void **p, void *end, 3921 struct ceph_watch_item **watchers, 3922 u32 *num_watchers) 3923 { 3924 u8 struct_v; 3925 u32 struct_len; 3926 int i; 3927 int ret; 3928 3929 ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t", 3930 &struct_v, &struct_len); 3931 if (ret) 3932 return ret; 3933 3934 *num_watchers = ceph_decode_32(p); 3935 *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO); 3936 if (!*watchers) 3937 return -ENOMEM; 3938 3939 for (i = 0; i < *num_watchers; i++) { 3940 ret = decode_watcher(p, end, *watchers + i); 3941 if (ret) { 3942 kfree(*watchers); 3943 return ret; 3944 } 3945 } 3946 3947 return 0; 3948 } 3949 3950 /* 3951 * On success, the caller is responsible for: 3952 * 3953 * kfree(watchers); 3954 */ 3955 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 3956 struct ceph_object_id *oid, 3957 struct ceph_object_locator *oloc, 3958 struct ceph_watch_item **watchers, 3959 u32 *num_watchers) 3960 { 3961 struct ceph_osd_request *req; 3962 struct page **pages; 3963 int ret; 3964 3965 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 3966 if (!req) 3967 return -ENOMEM; 3968 3969 ceph_oid_copy(&req->r_base_oid, oid); 3970 ceph_oloc_copy(&req->r_base_oloc, oloc); 3971 req->r_flags = CEPH_OSD_FLAG_READ; 3972 3973 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 3974 if (ret) 3975 goto out_put_req; 3976 3977 pages = ceph_alloc_page_vector(1, GFP_NOIO); 3978 if (IS_ERR(pages)) { 3979 ret = PTR_ERR(pages); 3980 goto out_put_req; 3981 } 3982 3983 osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0); 3984 ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers, 3985 response_data), 3986 pages, PAGE_SIZE, 0, false, true); 3987 3988 ceph_osdc_start_request(osdc, req, false); 3989 ret = ceph_osdc_wait_request(osdc, req); 3990 if (ret >= 0) { 3991 void *p = page_address(pages[0]); 3992 void *const end = p + req->r_ops[0].outdata_len; 3993 3994 ret = decode_watchers(&p, end, watchers, num_watchers); 3995 } 3996 3997 out_put_req: 3998 ceph_osdc_put_request(req); 3999 return ret; 4000 } 4001 EXPORT_SYMBOL(ceph_osdc_list_watchers); 4002 4003 /* 4004 * Call all pending notify callbacks - for use after a watch is 4005 * unregistered, to make sure no more callbacks for it will be invoked 4006 */ 4007 void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc) 4008 { 4009 dout("%s osdc %p\n", __func__, osdc); 4010 flush_workqueue(osdc->notify_wq); 4011 } 4012 EXPORT_SYMBOL(ceph_osdc_flush_notifies); 4013 4014 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc) 4015 { 4016 down_read(&osdc->lock); 4017 maybe_request_map(osdc); 4018 up_read(&osdc->lock); 4019 } 4020 EXPORT_SYMBOL(ceph_osdc_maybe_request_map); 4021 4022 /* 4023 * Execute an OSD class method on an object. 4024 * 4025 * @flags: CEPH_OSD_FLAG_* 4026 * @resp_len: out param for reply length 4027 */ 4028 int ceph_osdc_call(struct ceph_osd_client *osdc, 4029 struct ceph_object_id *oid, 4030 struct ceph_object_locator *oloc, 4031 const char *class, const char *method, 4032 unsigned int flags, 4033 struct page *req_page, size_t req_len, 4034 struct page *resp_page, size_t *resp_len) 4035 { 4036 struct ceph_osd_request *req; 4037 int ret; 4038 4039 req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); 4040 if (!req) 4041 return -ENOMEM; 4042 4043 ceph_oid_copy(&req->r_base_oid, oid); 4044 ceph_oloc_copy(&req->r_base_oloc, oloc); 4045 req->r_flags = flags; 4046 4047 ret = ceph_osdc_alloc_messages(req, GFP_NOIO); 4048 if (ret) 4049 goto out_put_req; 4050 4051 osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method); 4052 if (req_page) 4053 osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 4054 0, false, false); 4055 if (resp_page) 4056 osd_req_op_cls_response_data_pages(req, 0, &resp_page, 4057 PAGE_SIZE, 0, false, false); 4058 4059 ceph_osdc_start_request(osdc, req, false); 4060 ret = ceph_osdc_wait_request(osdc, req); 4061 if (ret >= 0) { 4062 ret = req->r_ops[0].rval; 4063 if (resp_page) 4064 *resp_len = req->r_ops[0].outdata_len; 4065 } 4066 4067 out_put_req: 4068 ceph_osdc_put_request(req); 4069 return ret; 4070 } 4071 EXPORT_SYMBOL(ceph_osdc_call); 4072 4073 /* 4074 * init, shutdown 4075 */ 4076 int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) 4077 { 4078 int err; 4079 4080 dout("init\n"); 4081 osdc->client = client; 4082 init_rwsem(&osdc->lock); 4083 osdc->osds = RB_ROOT; 4084 INIT_LIST_HEAD(&osdc->osd_lru); 4085 spin_lock_init(&osdc->osd_lru_lock); 4086 osd_init(&osdc->homeless_osd); 4087 osdc->homeless_osd.o_osdc = osdc; 4088 osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD; 4089 osdc->last_linger_id = CEPH_LINGER_ID_START; 4090 osdc->linger_requests = RB_ROOT; 4091 osdc->map_checks = RB_ROOT; 4092 osdc->linger_map_checks = RB_ROOT; 4093 INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); 4094 INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); 4095 4096 err = -ENOMEM; 4097 osdc->osdmap = ceph_osdmap_alloc(); 4098 if (!osdc->osdmap) 4099 goto out; 4100 4101 osdc->req_mempool = mempool_create_slab_pool(10, 4102 ceph_osd_request_cache); 4103 if (!osdc->req_mempool) 4104 goto out_map; 4105 4106 err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, 4107 PAGE_SIZE, 10, true, "osd_op"); 4108 if (err < 0) 4109 goto out_mempool; 4110 err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, 4111 PAGE_SIZE, 10, true, "osd_op_reply"); 4112 if (err < 0) 4113 goto out_msgpool; 4114 4115 err = -ENOMEM; 4116 osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); 4117 if (!osdc->notify_wq) 4118 goto out_msgpool_reply; 4119 4120 schedule_delayed_work(&osdc->timeout_work, 4121 osdc->client->options->osd_keepalive_timeout); 4122 schedule_delayed_work(&osdc->osds_timeout_work, 4123 round_jiffies_relative(osdc->client->options->osd_idle_ttl)); 4124 4125 return 0; 4126 4127 out_msgpool_reply: 4128 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4129 out_msgpool: 4130 ceph_msgpool_destroy(&osdc->msgpool_op); 4131 out_mempool: 4132 mempool_destroy(osdc->req_mempool); 4133 out_map: 4134 ceph_osdmap_destroy(osdc->osdmap); 4135 out: 4136 return err; 4137 } 4138 4139 void ceph_osdc_stop(struct ceph_osd_client *osdc) 4140 { 4141 flush_workqueue(osdc->notify_wq); 4142 destroy_workqueue(osdc->notify_wq); 4143 cancel_delayed_work_sync(&osdc->timeout_work); 4144 cancel_delayed_work_sync(&osdc->osds_timeout_work); 4145 4146 down_write(&osdc->lock); 4147 while (!RB_EMPTY_ROOT(&osdc->osds)) { 4148 struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), 4149 struct ceph_osd, o_node); 4150 close_osd(osd); 4151 } 4152 up_write(&osdc->lock); 4153 WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1); 4154 osd_cleanup(&osdc->homeless_osd); 4155 4156 WARN_ON(!list_empty(&osdc->osd_lru)); 4157 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests)); 4158 WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks)); 4159 WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks)); 4160 WARN_ON(atomic_read(&osdc->num_requests)); 4161 WARN_ON(atomic_read(&osdc->num_homeless)); 4162 4163 ceph_osdmap_destroy(osdc->osdmap); 4164 mempool_destroy(osdc->req_mempool); 4165 ceph_msgpool_destroy(&osdc->msgpool_op); 4166 ceph_msgpool_destroy(&osdc->msgpool_op_reply); 4167 } 4168 4169 /* 4170 * Read some contiguous pages. If we cross a stripe boundary, shorten 4171 * *plen. Return number of bytes read, or error. 4172 */ 4173 int ceph_osdc_readpages(struct ceph_osd_client *osdc, 4174 struct ceph_vino vino, struct ceph_file_layout *layout, 4175 u64 off, u64 *plen, 4176 u32 truncate_seq, u64 truncate_size, 4177 struct page **pages, int num_pages, int page_align) 4178 { 4179 struct ceph_osd_request *req; 4180 int rc = 0; 4181 4182 dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, 4183 vino.snap, off, *plen); 4184 req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, 4185 CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, 4186 NULL, truncate_seq, truncate_size, 4187 false); 4188 if (IS_ERR(req)) 4189 return PTR_ERR(req); 4190 4191 /* it may be a short read due to an object boundary */ 4192 osd_req_op_extent_osd_data_pages(req, 0, 4193 pages, *plen, page_align, false, false); 4194 4195 dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", 4196 off, *plen, *plen, page_align); 4197 4198 rc = ceph_osdc_start_request(osdc, req, false); 4199 if (!rc) 4200 rc = ceph_osdc_wait_request(osdc, req); 4201 4202 ceph_osdc_put_request(req); 4203 dout("readpages result %d\n", rc); 4204 return rc; 4205 } 4206 EXPORT_SYMBOL(ceph_osdc_readpages); 4207 4208 /* 4209 * do a synchronous write on N pages 4210 */ 4211 int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, 4212 struct ceph_file_layout *layout, 4213 struct ceph_snap_context *snapc, 4214 u64 off, u64 len, 4215 u32 truncate_seq, u64 truncate_size, 4216 struct timespec *mtime, 4217 struct page **pages, int num_pages) 4218 { 4219 struct ceph_osd_request *req; 4220 int rc = 0; 4221 int page_align = off & ~PAGE_MASK; 4222 4223 req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, 4224 CEPH_OSD_OP_WRITE, 4225 CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, 4226 snapc, truncate_seq, truncate_size, 4227 true); 4228 if (IS_ERR(req)) 4229 return PTR_ERR(req); 4230 4231 /* it may be a short write due to an object boundary */ 4232 osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, 4233 false, false); 4234 dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); 4235 4236 req->r_mtime = *mtime; 4237 rc = ceph_osdc_start_request(osdc, req, true); 4238 if (!rc) 4239 rc = ceph_osdc_wait_request(osdc, req); 4240 4241 ceph_osdc_put_request(req); 4242 if (rc == 0) 4243 rc = len; 4244 dout("writepages result %d\n", rc); 4245 return rc; 4246 } 4247 EXPORT_SYMBOL(ceph_osdc_writepages); 4248 4249 int ceph_osdc_setup(void) 4250 { 4251 size_t size = sizeof(struct ceph_osd_request) + 4252 CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); 4253 4254 BUG_ON(ceph_osd_request_cache); 4255 ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 4256 0, 0, NULL); 4257 4258 return ceph_osd_request_cache ? 0 : -ENOMEM; 4259 } 4260 EXPORT_SYMBOL(ceph_osdc_setup); 4261 4262 void ceph_osdc_cleanup(void) 4263 { 4264 BUG_ON(!ceph_osd_request_cache); 4265 kmem_cache_destroy(ceph_osd_request_cache); 4266 ceph_osd_request_cache = NULL; 4267 } 4268 EXPORT_SYMBOL(ceph_osdc_cleanup); 4269 4270 /* 4271 * handle incoming message 4272 */ 4273 static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) 4274 { 4275 struct ceph_osd *osd = con->private; 4276 struct ceph_osd_client *osdc = osd->o_osdc; 4277 int type = le16_to_cpu(msg->hdr.type); 4278 4279 switch (type) { 4280 case CEPH_MSG_OSD_MAP: 4281 ceph_osdc_handle_map(osdc, msg); 4282 break; 4283 case CEPH_MSG_OSD_OPREPLY: 4284 handle_reply(osd, msg); 4285 break; 4286 case CEPH_MSG_WATCH_NOTIFY: 4287 handle_watch_notify(osdc, msg); 4288 break; 4289 4290 default: 4291 pr_err("received unknown message type %d %s\n", type, 4292 ceph_msg_type_name(type)); 4293 } 4294 4295 ceph_msg_put(msg); 4296 } 4297 4298 /* 4299 * Lookup and return message for incoming reply. Don't try to do 4300 * anything about a larger than preallocated data portion of the 4301 * message at the moment - for now, just skip the message. 4302 */ 4303 static struct ceph_msg *get_reply(struct ceph_connection *con, 4304 struct ceph_msg_header *hdr, 4305 int *skip) 4306 { 4307 struct ceph_osd *osd = con->private; 4308 struct ceph_osd_client *osdc = osd->o_osdc; 4309 struct ceph_msg *m = NULL; 4310 struct ceph_osd_request *req; 4311 int front_len = le32_to_cpu(hdr->front_len); 4312 int data_len = le32_to_cpu(hdr->data_len); 4313 u64 tid = le64_to_cpu(hdr->tid); 4314 4315 down_read(&osdc->lock); 4316 if (!osd_registered(osd)) { 4317 dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd); 4318 *skip = 1; 4319 goto out_unlock_osdc; 4320 } 4321 WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num)); 4322 4323 mutex_lock(&osd->lock); 4324 req = lookup_request(&osd->o_requests, tid); 4325 if (!req) { 4326 dout("%s osd%d tid %llu unknown, skipping\n", __func__, 4327 osd->o_osd, tid); 4328 *skip = 1; 4329 goto out_unlock_session; 4330 } 4331 4332 ceph_msg_revoke_incoming(req->r_reply); 4333 4334 if (front_len > req->r_reply->front_alloc_len) { 4335 pr_warn("%s osd%d tid %llu front %d > preallocated %d\n", 4336 __func__, osd->o_osd, req->r_tid, front_len, 4337 req->r_reply->front_alloc_len); 4338 m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS, 4339 false); 4340 if (!m) 4341 goto out_unlock_session; 4342 ceph_msg_put(req->r_reply); 4343 req->r_reply = m; 4344 } 4345 4346 if (data_len > req->r_reply->data_length) { 4347 pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", 4348 __func__, osd->o_osd, req->r_tid, data_len, 4349 req->r_reply->data_length); 4350 m = NULL; 4351 *skip = 1; 4352 goto out_unlock_session; 4353 } 4354 4355 m = ceph_msg_get(req->r_reply); 4356 dout("get_reply tid %lld %p\n", tid, m); 4357 4358 out_unlock_session: 4359 mutex_unlock(&osd->lock); 4360 out_unlock_osdc: 4361 up_read(&osdc->lock); 4362 return m; 4363 } 4364 4365 /* 4366 * TODO: switch to a msg-owned pagelist 4367 */ 4368 static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr) 4369 { 4370 struct ceph_msg *m; 4371 int type = le16_to_cpu(hdr->type); 4372 u32 front_len = le32_to_cpu(hdr->front_len); 4373 u32 data_len = le32_to_cpu(hdr->data_len); 4374 4375 m = ceph_msg_new(type, front_len, GFP_NOIO, false); 4376 if (!m) 4377 return NULL; 4378 4379 if (data_len) { 4380 struct page **pages; 4381 struct ceph_osd_data osd_data; 4382 4383 pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), 4384 GFP_NOIO); 4385 if (IS_ERR(pages)) { 4386 ceph_msg_put(m); 4387 return NULL; 4388 } 4389 4390 ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false, 4391 false); 4392 ceph_osdc_msg_data_add(m, &osd_data); 4393 } 4394 4395 return m; 4396 } 4397 4398 static struct ceph_msg *alloc_msg(struct ceph_connection *con, 4399 struct ceph_msg_header *hdr, 4400 int *skip) 4401 { 4402 struct ceph_osd *osd = con->private; 4403 int type = le16_to_cpu(hdr->type); 4404 4405 *skip = 0; 4406 switch (type) { 4407 case CEPH_MSG_OSD_MAP: 4408 case CEPH_MSG_WATCH_NOTIFY: 4409 return alloc_msg_with_page_vector(hdr); 4410 case CEPH_MSG_OSD_OPREPLY: 4411 return get_reply(con, hdr, skip); 4412 default: 4413 pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__, 4414 osd->o_osd, type); 4415 *skip = 1; 4416 return NULL; 4417 } 4418 } 4419 4420 /* 4421 * Wrappers to refcount containing ceph_osd struct 4422 */ 4423 static struct ceph_connection *get_osd_con(struct ceph_connection *con) 4424 { 4425 struct ceph_osd *osd = con->private; 4426 if (get_osd(osd)) 4427 return con; 4428 return NULL; 4429 } 4430 4431 static void put_osd_con(struct ceph_connection *con) 4432 { 4433 struct ceph_osd *osd = con->private; 4434 put_osd(osd); 4435 } 4436 4437 /* 4438 * authentication 4439 */ 4440 /* 4441 * Note: returned pointer is the address of a structure that's 4442 * managed separately. Caller must *not* attempt to free it. 4443 */ 4444 static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, 4445 int *proto, int force_new) 4446 { 4447 struct ceph_osd *o = con->private; 4448 struct ceph_osd_client *osdc = o->o_osdc; 4449 struct ceph_auth_client *ac = osdc->client->monc.auth; 4450 struct ceph_auth_handshake *auth = &o->o_auth; 4451 4452 if (force_new && auth->authorizer) { 4453 ceph_auth_destroy_authorizer(auth->authorizer); 4454 auth->authorizer = NULL; 4455 } 4456 if (!auth->authorizer) { 4457 int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4458 auth); 4459 if (ret) 4460 return ERR_PTR(ret); 4461 } else { 4462 int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, 4463 auth); 4464 if (ret) 4465 return ERR_PTR(ret); 4466 } 4467 *proto = ac->protocol; 4468 4469 return auth; 4470 } 4471 4472 4473 static int verify_authorizer_reply(struct ceph_connection *con) 4474 { 4475 struct ceph_osd *o = con->private; 4476 struct ceph_osd_client *osdc = o->o_osdc; 4477 struct ceph_auth_client *ac = osdc->client->monc.auth; 4478 4479 return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer); 4480 } 4481 4482 static int invalidate_authorizer(struct ceph_connection *con) 4483 { 4484 struct ceph_osd *o = con->private; 4485 struct ceph_osd_client *osdc = o->o_osdc; 4486 struct ceph_auth_client *ac = osdc->client->monc.auth; 4487 4488 ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); 4489 return ceph_monc_validate_auth(&osdc->client->monc); 4490 } 4491 4492 static int osd_sign_message(struct ceph_msg *msg) 4493 { 4494 struct ceph_osd *o = msg->con->private; 4495 struct ceph_auth_handshake *auth = &o->o_auth; 4496 4497 return ceph_auth_sign_message(auth, msg); 4498 } 4499 4500 static int osd_check_message_signature(struct ceph_msg *msg) 4501 { 4502 struct ceph_osd *o = msg->con->private; 4503 struct ceph_auth_handshake *auth = &o->o_auth; 4504 4505 return ceph_auth_check_message_signature(auth, msg); 4506 } 4507 4508 static const struct ceph_connection_operations osd_con_ops = { 4509 .get = get_osd_con, 4510 .put = put_osd_con, 4511 .dispatch = dispatch, 4512 .get_authorizer = get_authorizer, 4513 .verify_authorizer_reply = verify_authorizer_reply, 4514 .invalidate_authorizer = invalidate_authorizer, 4515 .alloc_msg = alloc_msg, 4516 .sign_message = osd_sign_message, 4517 .check_message_signature = osd_check_message_signature, 4518 .fault = osd_fault, 4519 }; 4520