1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _FS_CEPH_OSD_CLIENT_H 3 #define _FS_CEPH_OSD_CLIENT_H 4 5 #include <linux/bitrev.h> 6 #include <linux/completion.h> 7 #include <linux/kref.h> 8 #include <linux/mempool.h> 9 #include <linux/rbtree.h> 10 #include <linux/refcount.h> 11 #include <linux/ktime.h> 12 13 #include <linux/ceph/types.h> 14 #include <linux/ceph/osdmap.h> 15 #include <linux/ceph/messenger.h> 16 #include <linux/ceph/msgpool.h> 17 #include <linux/ceph/auth.h> 18 #include <linux/ceph/pagelist.h> 19 20 struct ceph_msg; 21 struct ceph_snap_context; 22 struct ceph_osd_request; 23 struct ceph_osd_client; 24 25 /* 26 * completion callback for async writepages 27 */ 28 typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *); 29 30 #define CEPH_HOMELESS_OSD -1 31 32 /* 33 * A single extent in a SPARSE_READ reply. 34 * 35 * Note that these come from the OSD as little-endian values. On BE arches, 36 * we convert them in-place after receipt. 37 */ 38 struct ceph_sparse_extent { 39 u64 off; 40 u64 len; 41 } __packed; 42 43 /* Sparse read state machine state values */ 44 enum ceph_sparse_read_state { 45 CEPH_SPARSE_READ_HDR = 0, 46 CEPH_SPARSE_READ_EXTENTS, 47 CEPH_SPARSE_READ_DATA_LEN, 48 CEPH_SPARSE_READ_DATA_PRE, 49 CEPH_SPARSE_READ_DATA, 50 }; 51 52 /* 53 * A SPARSE_READ reply is a 32-bit count of extents, followed by an array of 54 * 64-bit offset/length pairs, and then all of the actual file data 55 * concatenated after it (sans holes). 56 * 57 * Unfortunately, we don't know how long the extent array is until we've 58 * started reading the data section of the reply. The caller should send down 59 * a destination buffer for the array, but we'll alloc one if it's too small 60 * or if the caller doesn't. 61 */ 62 struct ceph_sparse_read { 63 enum ceph_sparse_read_state sr_state; /* state machine state */ 64 u64 sr_req_off; /* orig request offset */ 65 u64 sr_req_len; /* orig request length */ 66 u64 sr_pos; /* current pos in buffer */ 67 int sr_index; /* current extent index */ 68 u32 sr_datalen; /* length of actual data */ 69 u32 sr_count; /* extent count in reply */ 70 int sr_ext_len; /* length of extent array */ 71 struct ceph_sparse_extent *sr_extent; /* extent array */ 72 }; 73 74 /* 75 * A given osd we're communicating with. 76 * 77 * Note that the o_requests tree can be searched while holding the "lock" mutex 78 * or the "o_requests_lock" spinlock. Insertion or removal requires both! 79 */ 80 struct ceph_osd { 81 refcount_t o_ref; 82 int o_sparse_op_idx; 83 struct ceph_osd_client *o_osdc; 84 int o_osd; 85 int o_incarnation; 86 struct rb_node o_node; 87 struct ceph_connection o_con; 88 spinlock_t o_requests_lock; 89 struct rb_root o_requests; 90 struct rb_root o_linger_requests; 91 struct rb_root o_backoff_mappings; 92 struct rb_root o_backoffs_by_id; 93 struct list_head o_osd_lru; 94 struct ceph_auth_handshake o_auth; 95 unsigned long lru_ttl; 96 struct list_head o_keepalive_item; 97 struct mutex lock; 98 struct ceph_sparse_read o_sparse_read; 99 }; 100 101 #define CEPH_OSD_SLAB_OPS 2 102 #define CEPH_OSD_MAX_OPS 16 103 104 enum ceph_osd_data_type { 105 CEPH_OSD_DATA_TYPE_NONE = 0, 106 CEPH_OSD_DATA_TYPE_PAGES, 107 CEPH_OSD_DATA_TYPE_PAGELIST, 108 #ifdef CONFIG_BLOCK 109 CEPH_OSD_DATA_TYPE_BIO, 110 #endif /* CONFIG_BLOCK */ 111 CEPH_OSD_DATA_TYPE_BVECS, 112 CEPH_OSD_DATA_TYPE_ITER, 113 }; 114 115 struct ceph_osd_data { 116 enum ceph_osd_data_type type; 117 union { 118 struct { 119 struct page **pages; 120 u64 length; 121 u32 alignment; 122 bool pages_from_pool; 123 bool own_pages; 124 }; 125 struct ceph_pagelist *pagelist; 126 #ifdef CONFIG_BLOCK 127 struct { 128 struct ceph_bio_iter bio_pos; 129 u32 bio_length; 130 }; 131 #endif /* CONFIG_BLOCK */ 132 struct { 133 struct ceph_bvec_iter bvec_pos; 134 u32 num_bvecs; 135 }; 136 struct iov_iter iter; 137 }; 138 }; 139 140 struct ceph_osd_req_op { 141 u16 op; /* CEPH_OSD_OP_* */ 142 u32 flags; /* CEPH_OSD_OP_FLAG_* */ 143 u32 indata_len; /* request */ 144 u32 outdata_len; /* reply */ 145 s32 rval; 146 147 union { 148 struct ceph_osd_data raw_data_in; 149 struct { 150 u64 offset, length; 151 u64 truncate_size; 152 u32 truncate_seq; 153 int sparse_ext_cnt; 154 struct ceph_sparse_extent *sparse_ext; 155 struct ceph_osd_data osd_data; 156 } extent; 157 struct { 158 u32 name_len; 159 u32 value_len; 160 __u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */ 161 __u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */ 162 struct ceph_osd_data osd_data; 163 } xattr; 164 struct { 165 const char *class_name; 166 const char *method_name; 167 struct ceph_osd_data request_info; 168 struct ceph_osd_data request_data; 169 struct ceph_osd_data response_data; 170 __u8 class_len; 171 __u8 method_len; 172 u32 indata_len; 173 } cls; 174 struct { 175 u64 cookie; 176 __u8 op; /* CEPH_OSD_WATCH_OP_ */ 177 u32 gen; 178 } watch; 179 struct { 180 struct ceph_osd_data request_data; 181 } notify_ack; 182 struct { 183 u64 cookie; 184 struct ceph_osd_data request_data; 185 struct ceph_osd_data response_data; 186 } notify; 187 struct { 188 struct ceph_osd_data response_data; 189 } list_watchers; 190 struct { 191 u64 expected_object_size; 192 u64 expected_write_size; 193 u32 flags; /* CEPH_OSD_OP_ALLOC_HINT_FLAG_* */ 194 } alloc_hint; 195 struct { 196 u64 snapid; 197 u64 src_version; 198 u8 flags; 199 u32 src_fadvise_flags; 200 struct ceph_osd_data osd_data; 201 } copy_from; 202 struct { 203 u64 ver; 204 } assert_ver; 205 }; 206 }; 207 208 struct ceph_osd_request_target { 209 struct ceph_object_id base_oid; 210 struct ceph_object_locator base_oloc; 211 struct ceph_object_id target_oid; 212 struct ceph_object_locator target_oloc; 213 214 struct ceph_pg pgid; /* last raw pg we mapped to */ 215 struct ceph_spg spgid; /* last actual spg we mapped to */ 216 u32 pg_num; 217 u32 pg_num_mask; 218 struct ceph_osds acting; 219 struct ceph_osds up; 220 int size; 221 int min_size; 222 bool sort_bitwise; 223 bool recovery_deletes; 224 225 unsigned int flags; /* CEPH_OSD_FLAG_* */ 226 bool used_replica; 227 bool paused; 228 229 u32 epoch; 230 u32 last_force_resend; 231 232 int osd; 233 }; 234 235 /* an in-flight request */ 236 struct ceph_osd_request { 237 u64 r_tid; /* unique for this client */ 238 struct rb_node r_node; 239 struct rb_node r_mc_node; /* map check */ 240 struct work_struct r_complete_work; 241 struct ceph_osd *r_osd; 242 243 struct ceph_osd_request_target r_t; 244 #define r_base_oid r_t.base_oid 245 #define r_base_oloc r_t.base_oloc 246 #define r_flags r_t.flags 247 248 struct ceph_msg *r_request, *r_reply; 249 u32 r_sent; /* >0 if r_request is sending/sent */ 250 251 /* request osd ops array */ 252 unsigned int r_num_ops; 253 254 int r_result; 255 256 struct ceph_osd_client *r_osdc; 257 struct kref r_kref; 258 bool r_mempool; 259 bool r_linger; /* don't resend on failure */ 260 struct completion r_completion; /* private to osd_client.c */ 261 ceph_osdc_callback_t r_callback; 262 263 struct inode *r_inode; /* for use by callbacks */ 264 struct list_head r_private_item; /* ditto */ 265 void *r_priv; /* ditto */ 266 267 /* set by submitter */ 268 u64 r_snapid; /* for reads, CEPH_NOSNAP o/w */ 269 struct ceph_snap_context *r_snapc; /* for writes */ 270 struct timespec64 r_mtime; /* ditto */ 271 u64 r_data_offset; /* ditto */ 272 273 /* internal */ 274 u64 r_version; /* data version sent in reply */ 275 unsigned long r_stamp; /* jiffies, send or check time */ 276 unsigned long r_start_stamp; /* jiffies */ 277 ktime_t r_start_latency; /* ktime_t */ 278 ktime_t r_end_latency; /* ktime_t */ 279 int r_attempts; 280 u32 r_map_dne_bound; 281 282 struct ceph_osd_req_op r_ops[] __counted_by(r_num_ops); 283 }; 284 285 struct ceph_request_redirect { 286 struct ceph_object_locator oloc; 287 }; 288 289 /* 290 * osd request identifier 291 * 292 * caller name + incarnation# + tid to unique identify this request 293 */ 294 struct ceph_osd_reqid { 295 struct ceph_entity_name name; 296 __le64 tid; 297 __le32 inc; 298 } __packed; 299 300 struct ceph_blkin_trace_info { 301 __le64 trace_id; 302 __le64 span_id; 303 __le64 parent_span_id; 304 } __packed; 305 306 typedef void (*rados_watchcb2_t)(void *arg, u64 notify_id, u64 cookie, 307 u64 notifier_id, void *data, size_t data_len); 308 typedef void (*rados_watcherrcb_t)(void *arg, u64 cookie, int err); 309 310 struct ceph_osd_linger_request { 311 struct ceph_osd_client *osdc; 312 u64 linger_id; 313 bool committed; 314 bool is_watch; /* watch or notify */ 315 316 struct ceph_osd *osd; 317 struct ceph_osd_request *reg_req; 318 struct ceph_osd_request *ping_req; 319 unsigned long ping_sent; 320 unsigned long watch_valid_thru; 321 struct list_head pending_lworks; 322 323 struct ceph_osd_request_target t; 324 u32 map_dne_bound; 325 326 struct timespec64 mtime; 327 328 struct kref kref; 329 struct mutex lock; 330 struct rb_node node; /* osd */ 331 struct rb_node osdc_node; /* osdc */ 332 struct rb_node mc_node; /* map check */ 333 struct list_head scan_item; 334 335 struct completion reg_commit_wait; 336 struct completion notify_finish_wait; 337 int reg_commit_error; 338 int notify_finish_error; 339 int last_error; 340 341 u32 register_gen; 342 u64 notify_id; 343 344 rados_watchcb2_t wcb; 345 rados_watcherrcb_t errcb; 346 void *data; 347 348 struct ceph_pagelist *request_pl; 349 struct page **notify_id_pages; 350 351 struct page ***preply_pages; 352 size_t *preply_len; 353 }; 354 355 struct ceph_watch_item { 356 struct ceph_entity_name name; 357 u64 cookie; 358 struct ceph_entity_addr addr; 359 }; 360 361 struct ceph_spg_mapping { 362 struct rb_node node; 363 struct ceph_spg spgid; 364 365 struct rb_root backoffs; 366 }; 367 368 struct ceph_hobject_id { 369 void *key; 370 size_t key_len; 371 void *oid; 372 size_t oid_len; 373 u64 snapid; 374 u32 hash; 375 u8 is_max; 376 void *nspace; 377 size_t nspace_len; 378 s64 pool; 379 380 /* cache */ 381 u32 hash_reverse_bits; 382 }; 383 ceph_hoid_build_hash_cache(struct ceph_hobject_id * hoid)384 static inline void ceph_hoid_build_hash_cache(struct ceph_hobject_id *hoid) 385 { 386 hoid->hash_reverse_bits = bitrev32(hoid->hash); 387 } 388 389 /* 390 * PG-wide backoff: [begin, end) 391 * per-object backoff: begin == end 392 */ 393 struct ceph_osd_backoff { 394 struct rb_node spg_node; 395 struct rb_node id_node; 396 397 struct ceph_spg spgid; 398 u64 id; 399 struct ceph_hobject_id *begin; 400 struct ceph_hobject_id *end; 401 }; 402 403 #define CEPH_LINGER_ID_START 0xffff000000000000ULL 404 405 struct ceph_osd_client { 406 struct ceph_client *client; 407 408 struct ceph_osdmap *osdmap; /* current map */ 409 struct rw_semaphore lock; 410 411 struct rb_root osds; /* osds */ 412 struct list_head osd_lru; /* idle osds */ 413 spinlock_t osd_lru_lock; 414 u32 epoch_barrier; 415 struct ceph_osd homeless_osd; 416 atomic64_t last_tid; /* tid of last request */ 417 u64 last_linger_id; 418 struct rb_root linger_requests; /* lingering requests */ 419 struct rb_root map_checks; 420 struct rb_root linger_map_checks; 421 atomic_t num_requests; 422 atomic_t num_homeless; 423 int abort_err; 424 struct delayed_work timeout_work; 425 struct delayed_work osds_timeout_work; 426 #ifdef CONFIG_DEBUG_FS 427 struct dentry *debugfs_file; 428 #endif 429 430 mempool_t *req_mempool; 431 432 struct ceph_msgpool msgpool_op; 433 struct ceph_msgpool msgpool_op_reply; 434 435 struct workqueue_struct *notify_wq; 436 struct workqueue_struct *completion_wq; 437 }; 438 ceph_osdmap_flag(struct ceph_osd_client * osdc,int flag)439 static inline bool ceph_osdmap_flag(struct ceph_osd_client *osdc, int flag) 440 { 441 return osdc->osdmap->flags & flag; 442 } 443 444 extern int ceph_osdc_setup(void); 445 extern void ceph_osdc_cleanup(void); 446 447 extern int ceph_osdc_init(struct ceph_osd_client *osdc, 448 struct ceph_client *client); 449 extern void ceph_osdc_stop(struct ceph_osd_client *osdc); 450 extern void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc); 451 452 extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc, 453 struct ceph_msg *msg); 454 void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb); 455 void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err); 456 void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc); 457 458 #define osd_req_op_data(oreq, whch, typ, fld) \ 459 ({ \ 460 struct ceph_osd_request *__oreq = (oreq); \ 461 unsigned int __whch = (whch); \ 462 BUG_ON(__whch >= __oreq->r_num_ops); \ 463 &__oreq->r_ops[__whch].typ.fld; \ 464 }) 465 466 struct ceph_osd_req_op *osd_req_op_init(struct ceph_osd_request *osd_req, 467 unsigned int which, u16 opcode, u32 flags); 468 469 extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *, 470 unsigned int which, 471 struct page **pages, u64 length, 472 u32 alignment, bool pages_from_pool, 473 bool own_pages); 474 475 extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req, 476 unsigned int which, u16 opcode, 477 u64 offset, u64 length, 478 u64 truncate_size, u32 truncate_seq); 479 extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req, 480 unsigned int which, u64 length); 481 extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, 482 unsigned int which, u64 offset_inc); 483 484 extern struct ceph_osd_data *osd_req_op_extent_osd_data( 485 struct ceph_osd_request *osd_req, 486 unsigned int which); 487 488 extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *, 489 unsigned int which, 490 struct page **pages, u64 length, 491 u32 alignment, bool pages_from_pool, 492 bool own_pages); 493 extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, 494 unsigned int which, 495 struct ceph_pagelist *pagelist); 496 #ifdef CONFIG_BLOCK 497 void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, 498 unsigned int which, 499 struct ceph_bio_iter *bio_pos, 500 u32 bio_length); 501 #endif /* CONFIG_BLOCK */ 502 void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req, 503 unsigned int which, 504 struct bio_vec *bvecs, u32 num_bvecs, 505 u32 bytes); 506 void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req, 507 unsigned int which, 508 struct ceph_bvec_iter *bvec_pos); 509 void osd_req_op_extent_osd_iter(struct ceph_osd_request *osd_req, 510 unsigned int which, struct iov_iter *iter); 511 512 extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, 513 unsigned int which, 514 struct ceph_pagelist *pagelist); 515 extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *, 516 unsigned int which, 517 struct page **pages, u64 length, 518 u32 alignment, bool pages_from_pool, 519 bool own_pages); 520 void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req, 521 unsigned int which, 522 struct bio_vec *bvecs, u32 num_bvecs, 523 u32 bytes); 524 extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *, 525 unsigned int which, 526 struct page **pages, u64 length, 527 u32 alignment, bool pages_from_pool, 528 bool own_pages); 529 int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, 530 const char *class, const char *method); 531 extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, 532 u16 opcode, const char *name, const void *value, 533 size_t size, u8 cmp_op, u8 cmp_mode); 534 extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, 535 unsigned int which, 536 u64 expected_object_size, 537 u64 expected_write_size, 538 u32 flags); 539 extern int osd_req_op_copy_from_init(struct ceph_osd_request *req, 540 u64 src_snapid, u64 src_version, 541 struct ceph_object_id *src_oid, 542 struct ceph_object_locator *src_oloc, 543 u32 src_fadvise_flags, 544 u32 dst_fadvise_flags, 545 u32 truncate_seq, u64 truncate_size, 546 u8 copy_from_flags); 547 548 extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, 549 struct ceph_snap_context *snapc, 550 unsigned int num_ops, 551 bool use_mempool, 552 gfp_t gfp_flags); 553 int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp); 554 555 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *, 556 struct ceph_file_layout *layout, 557 struct ceph_vino vino, 558 u64 offset, u64 *len, 559 unsigned int which, int num_ops, 560 int opcode, int flags, 561 struct ceph_snap_context *snapc, 562 u32 truncate_seq, u64 truncate_size, 563 bool use_mempool); 564 565 int __ceph_alloc_sparse_ext_map(struct ceph_osd_req_op *op, int cnt); 566 567 /* 568 * How big an extent array should we preallocate for a sparse read? This is 569 * just a starting value. If we get more than this back from the OSD, the 570 * receiver will reallocate. 571 */ 572 #define CEPH_SPARSE_EXT_ARRAY_INITIAL 16 573 ceph_alloc_sparse_ext_map(struct ceph_osd_req_op * op,int cnt)574 static inline int ceph_alloc_sparse_ext_map(struct ceph_osd_req_op *op, int cnt) 575 { 576 if (!cnt) 577 cnt = CEPH_SPARSE_EXT_ARRAY_INITIAL; 578 579 return __ceph_alloc_sparse_ext_map(op, cnt); 580 } 581 582 extern void ceph_osdc_get_request(struct ceph_osd_request *req); 583 extern void ceph_osdc_put_request(struct ceph_osd_request *req); 584 585 void ceph_osdc_start_request(struct ceph_osd_client *osdc, 586 struct ceph_osd_request *req); 587 extern void ceph_osdc_cancel_request(struct ceph_osd_request *req); 588 extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc, 589 struct ceph_osd_request *req); 590 extern void ceph_osdc_sync(struct ceph_osd_client *osdc); 591 592 extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc); 593 void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc); 594 595 int ceph_osdc_call(struct ceph_osd_client *osdc, 596 struct ceph_object_id *oid, 597 struct ceph_object_locator *oloc, 598 const char *class, const char *method, 599 unsigned int flags, 600 struct page *req_page, size_t req_len, 601 struct page **resp_pages, size_t *resp_len); 602 603 /* watch/notify */ 604 struct ceph_osd_linger_request * 605 ceph_osdc_watch(struct ceph_osd_client *osdc, 606 struct ceph_object_id *oid, 607 struct ceph_object_locator *oloc, 608 rados_watchcb2_t wcb, 609 rados_watcherrcb_t errcb, 610 void *data); 611 int ceph_osdc_unwatch(struct ceph_osd_client *osdc, 612 struct ceph_osd_linger_request *lreq); 613 614 int ceph_osdc_notify_ack(struct ceph_osd_client *osdc, 615 struct ceph_object_id *oid, 616 struct ceph_object_locator *oloc, 617 u64 notify_id, 618 u64 cookie, 619 void *payload, 620 u32 payload_len); 621 int ceph_osdc_notify(struct ceph_osd_client *osdc, 622 struct ceph_object_id *oid, 623 struct ceph_object_locator *oloc, 624 void *payload, 625 u32 payload_len, 626 u32 timeout, 627 struct page ***preply_pages, 628 size_t *preply_len); 629 int ceph_osdc_watch_check(struct ceph_osd_client *osdc, 630 struct ceph_osd_linger_request *lreq); 631 int ceph_osdc_list_watchers(struct ceph_osd_client *osdc, 632 struct ceph_object_id *oid, 633 struct ceph_object_locator *oloc, 634 struct ceph_watch_item **watchers, 635 u32 *num_watchers); 636 637 /* Find offset into the buffer of the end of the extent map */ ceph_sparse_ext_map_end(struct ceph_osd_req_op * op)638 static inline u64 ceph_sparse_ext_map_end(struct ceph_osd_req_op *op) 639 { 640 struct ceph_sparse_extent *ext; 641 642 /* No extents? No data */ 643 if (op->extent.sparse_ext_cnt == 0) 644 return 0; 645 646 ext = &op->extent.sparse_ext[op->extent.sparse_ext_cnt - 1]; 647 648 return ext->off + ext->len - op->extent.offset; 649 } 650 651 #endif 652