1 /* 2 * Copyright (c) 2011-2016 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@dragonflybsd.org> 6 * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 3. Neither the name of The DragonFly Project nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific, prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 /* 37 * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES 38 * 39 * This header file contains structures used internally by the HAMMER2 40 * implementation. See hammer2_disk.h for on-disk structures. 41 * 42 * There is an in-memory representation of all on-media data structure. 43 * Almost everything is represented by a hammer2_chain structure in-memory. 44 * Other higher-level structures typically map to chains. 45 * 46 * A great deal of data is accessed simply via its buffer cache buffer, 47 * which is mapped for the duration of the chain's lock. Hammer2 must 48 * implement its own buffer cache layer on top of the system layer to 49 * allow for different threads to lock different sub-block-sized buffers. 50 * 51 * When modifications are made to a chain a new filesystem block must be 52 * allocated. Multiple modifications do not typically allocate new blocks 53 * until the current block has been flushed. Flushes do not block the 54 * front-end unless the front-end operation crosses the current inode being 55 * flushed. 56 * 57 * The in-memory representation may remain cached (for example in order to 58 * placemark clustering locks) even after the related data has been 59 * detached. 60 */ 61 62 #ifndef _VFS_HAMMER2_HAMMER2_H_ 63 #define _VFS_HAMMER2_HAMMER2_H_ 64 65 #include <sys/param.h> 66 #include <sys/types.h> 67 #include <sys/kernel.h> 68 #include <sys/conf.h> 69 #include <sys/systm.h> 70 #include <sys/tree.h> 71 #include <sys/malloc.h> 72 #include <sys/mount.h> 73 #include <sys/vnode.h> 74 #include <sys/proc.h> 75 #include <sys/mountctl.h> 76 #include <sys/priv.h> 77 #include <sys/stat.h> 78 #include <sys/thread.h> 79 #include <sys/globaldata.h> 80 #include <sys/lockf.h> 81 #include <sys/buf.h> 82 #include <sys/queue.h> 83 #include <sys/limits.h> 84 #include <sys/dmsg.h> 85 #include <sys/mutex.h> 86 #include <sys/kern_syscall.h> 87 88 #include <sys/signal2.h> 89 #include <sys/buf2.h> 90 #include <sys/mutex2.h> 91 #include <sys/thread2.h> 92 93 #include "hammer2_xxhash.h" 94 #include "hammer2_disk.h" 95 #include "hammer2_mount.h" 96 #include "hammer2_ioctl.h" 97 98 struct hammer2_io; 99 struct hammer2_iocb; 100 struct hammer2_chain; 101 struct hammer2_cluster; 102 struct hammer2_inode; 103 struct hammer2_dev; 104 struct hammer2_pfs; 105 struct hammer2_span; 106 struct hammer2_state; 107 struct hammer2_msg; 108 struct hammer2_thread; 109 union hammer2_xop; 110 111 /* 112 * Mutex and lock shims. Hammer2 requires support for asynchronous and 113 * abortable locks, and both exclusive and shared spinlocks. Normal 114 * synchronous non-abortable locks can be substituted for spinlocks. 115 */ 116 typedef mtx_t hammer2_mtx_t; 117 typedef mtx_link_t hammer2_mtx_link_t; 118 typedef mtx_state_t hammer2_mtx_state_t; 119 120 typedef struct spinlock hammer2_spin_t; 121 122 #define hammer2_mtx_ex mtx_lock_ex_quick 123 #define hammer2_mtx_sh mtx_lock_sh_quick 124 #define hammer2_mtx_sh_again mtx_lock_sh_again 125 #define hammer2_mtx_unlock mtx_unlock 126 #define hammer2_mtx_downgrade mtx_downgrade 127 #define hammer2_mtx_owned mtx_owned 128 #define hammer2_mtx_init mtx_init 129 #define hammer2_mtx_temp_release mtx_lock_temp_release 130 #define hammer2_mtx_temp_restore mtx_lock_temp_restore 131 #define hammer2_mtx_refs mtx_lockrefs 132 133 #define hammer2_spin_init spin_init 134 #define hammer2_spin_sh spin_lock_shared 135 #define hammer2_spin_ex spin_lock 136 #define hammer2_spin_unsh spin_unlock_shared 137 #define hammer2_spin_unex spin_unlock 138 139 TAILQ_HEAD(hammer2_xop_list, hammer2_xop_head); 140 TAILQ_HEAD(hammer2_chain_list, hammer2_chain); 141 142 typedef struct hammer2_xop_list hammer2_xop_list_t; 143 144 145 /* 146 * General lock support 147 */ 148 static __inline 149 int 150 hammer2_mtx_upgrade_try(hammer2_mtx_t *mtx) 151 { 152 return mtx_upgrade_try(mtx); 153 } 154 155 /* 156 * The xid tracks internal transactional updates. 157 * 158 * XXX fix-me, really needs to be 64-bits 159 */ 160 typedef uint32_t hammer2_xid_t; 161 162 #define HAMMER2_XID_MIN 0x00000000U 163 #define HAMMER2_XID_MAX 0x7FFFFFFFU 164 165 #define HAMMER2_LIMIT_DIRTY_CHAINS (65536) 166 167 /* 168 * The chain structure tracks a portion of the media topology from the 169 * root (volume) down. Chains represent volumes, inodes, indirect blocks, 170 * data blocks, and freemap nodes and leafs. 171 * 172 * The chain structure utilizes a simple singly-homed topology and the 173 * chain's in-memory topology will move around as the chains do, due mainly 174 * to renames and indirect block creation. 175 * 176 * Block Table Updates 177 * 178 * Block table updates for insertions and updates are delayed until the 179 * flush. This allows us to avoid having to modify the parent chain 180 * all the way to the root. 181 * 182 * Block table deletions are performed immediately (modifying the parent 183 * in the process) because the flush code uses the chain structure to 184 * track delayed updates and the chain will be (likely) gone or moved to 185 * another location in the topology after a deletion. 186 * 187 * A prior iteration of the code tried to keep the relationship intact 188 * on deletes by doing a delete-duplicate operation on the chain, but 189 * it added way too much complexity to the codebase. 190 * 191 * Flush Synchronization 192 * 193 * The flush code must flush modified chains bottom-up. Because chain 194 * structures can shift around and are NOT topologically stable, 195 * modified chains are independently indexed for the flush. As the flush 196 * runs it modifies (or further modifies) and updates the parents, 197 * propagating the flush all the way to the volume root. 198 * 199 * Modifying front-end operations can occur during a flush but will block 200 * in two cases: (1) when the front-end tries to operate on the inode 201 * currently in the midst of being flushed and (2) if the front-end 202 * crosses an inode currently being flushed (such as during a rename). 203 * So, for example, if you rename directory "x" to "a/b/c/d/e/f/g/x" and 204 * the flusher is currently working on "a/b/c", the rename will block 205 * temporarily in order to ensure that "x" exists in one place or the 206 * other. 207 * 208 * Meta-data statistics are updated by the flusher. The front-end will 209 * make estimates but meta-data must be fully synchronized only during a 210 * flush in order to ensure that it remains correct across a crash. 211 * 212 * Multiple flush synchronizations can theoretically be in-flight at the 213 * same time but the implementation is not coded to handle the case and 214 * currently serializes them. 215 * 216 * Snapshots: 217 * 218 * Snapshots currently require the subdirectory tree being snapshotted 219 * to be flushed. The snapshot then creates a new super-root inode which 220 * copies the flushed blockdata of the directory or file that was 221 * snapshotted. 222 * 223 * RBTREE NOTES: 224 * 225 * - Note that the radix tree runs in powers of 2 only so sub-trees 226 * cannot straddle edges. 227 */ 228 RB_HEAD(hammer2_chain_tree, hammer2_chain); 229 TAILQ_HEAD(h2_flush_list, hammer2_chain); 230 TAILQ_HEAD(h2_core_list, hammer2_chain); 231 TAILQ_HEAD(h2_iocb_list, hammer2_iocb); 232 233 #define CHAIN_CORE_DELETE_BMAP_ENTRIES \ 234 (HAMMER2_PBUFSIZE / sizeof(hammer2_blockref_t) / sizeof(uint32_t)) 235 236 /* 237 * Core topology for chain (embedded in chain). Protected by a spinlock. 238 */ 239 struct hammer2_chain_core { 240 hammer2_spin_t spin; 241 struct hammer2_chain_tree rbtree; /* sub-chains */ 242 int live_zero; /* blockref array opt */ 243 u_int live_count; /* live (not deleted) chains in tree */ 244 u_int chain_count; /* live + deleted chains under core */ 245 int generation; /* generation number (inserts only) */ 246 }; 247 248 typedef struct hammer2_chain_core hammer2_chain_core_t; 249 250 RB_HEAD(hammer2_io_tree, hammer2_io); 251 252 /* 253 * IOCB - IO callback (into chain, cluster, or manual request) 254 */ 255 struct hammer2_iocb { 256 TAILQ_ENTRY(hammer2_iocb) entry; 257 void (*callback)(struct hammer2_iocb *iocb); 258 struct hammer2_io *dio; 259 struct hammer2_cluster *cluster; 260 struct hammer2_chain *chain; 261 void *ptr; 262 off_t lbase; 263 int lsize; 264 uint32_t flags; 265 int error; 266 int btype; 267 }; 268 269 typedef struct hammer2_iocb hammer2_iocb_t; 270 271 #define HAMMER2_IOCB_INTERLOCK 0x00000001 272 #define HAMMER2_IOCB_ONQ 0x00000002 273 #define HAMMER2_IOCB_DONE 0x00000004 274 #define HAMMER2_IOCB_INPROG 0x00000008 275 #define HAMMER2_IOCB_UNUSED10 0x00000010 276 #define HAMMER2_IOCB_QUICK 0x00010000 277 #define HAMMER2_IOCB_ZERO 0x00020000 278 #define HAMMER2_IOCB_READ 0x00040000 279 #define HAMMER2_IOCB_WAKEUP 0x00080000 280 281 /* 282 * DIO - Management structure wrapping system buffer cache. 283 * 284 * Used for multiple purposes including concurrent management 285 * if small requests by chains into larger DIOs. 286 */ 287 struct hammer2_io { 288 RB_ENTRY(hammer2_io) rbnode; /* indexed by device offset */ 289 struct h2_iocb_list iocbq; 290 struct spinlock spin; 291 struct hammer2_dev *hmp; 292 struct buf *bp; 293 off_t pbase; 294 uint64_t refs; 295 int psize; 296 int act; /* activity */ 297 int btype; /* approximate BREF_TYPE_* */ 298 int unused01; 299 }; 300 301 typedef struct hammer2_io hammer2_io_t; 302 303 #define HAMMER2_DIO_INPROG 0x8000000000000000LLU /* bio in progress */ 304 #define HAMMER2_DIO_GOOD 0x4000000000000000LLU /* dio->bp is stable */ 305 #define HAMMER2_DIO_WAITING 0x2000000000000000LLU /* wait on INPROG */ 306 #define HAMMER2_DIO_DIRTY 0x1000000000000000LLU /* flush last drop */ 307 #define HAMMER2_DIO_INVALOK 0x0800000000000000LLU /* ok to inval */ 308 #define HAMMER2_DIO_INVAL 0x0400000000000000LLU /* inval request */ 309 310 #define HAMMER2_DIO_MASK 0x00FFFFFFFFFFFFFFLLU 311 312 #define HAMMER2_DIO_INVALBITS (HAMMER2_DIO_INVAL | HAMMER2_DIO_INVALOK) 313 314 /* 315 * Primary chain structure keeps track of the topology in-memory. 316 */ 317 struct hammer2_chain { 318 hammer2_mtx_t lock; 319 hammer2_chain_core_t core; 320 RB_ENTRY(hammer2_chain) rbnode; /* live chain(s) */ 321 hammer2_blockref_t bref; 322 struct hammer2_chain *parent; 323 struct hammer2_state *state; /* if active cache msg */ 324 struct hammer2_dev *hmp; 325 struct hammer2_pfs *pmp; /* A PFS or super-root (spmp) */ 326 327 hammer2_io_t *dio; /* physical data buffer */ 328 u_int bytes; /* physical data size */ 329 u_int flags; 330 u_int refs; 331 u_int lockcnt; 332 int error; /* on-lock data error state */ 333 int persist_refs; /* (aka ip->cluster) */ 334 335 hammer2_media_data_t *data; /* data pointer shortcut */ 336 TAILQ_ENTRY(hammer2_chain) flush_node; /* flush list */ 337 TAILQ_ENTRY(hammer2_chain) lru_node; /* 0-refs LRU */ 338 }; 339 340 typedef struct hammer2_chain hammer2_chain_t; 341 342 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2); 343 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp); 344 345 /* 346 * Special notes on flags: 347 * 348 * INITIAL - This flag allows a chain to be created and for storage to 349 * be allocated without having to immediately instantiate the 350 * related buffer. The data is assumed to be all-zeros. It 351 * is primarily used for indirect blocks. 352 * 353 * MODIFIED - The chain's media data has been modified. Prevents chain 354 * free on lastdrop if still in the topology. 355 * 356 * UPDATE - Chain might not be modified but parent blocktable needs 357 * an update. Prevents chain free on lastdrop if still in 358 * the topology. 359 * 360 * FICTITIOUS - Faked chain as a placeholder for an error condition. This 361 * chain is unsuitable for I/O. 362 * 363 * BMAPPED - Indicates that the chain is present in the parent blockmap. 364 * 365 * BMAPUPD - Indicates that the chain is present but needs to be updated 366 * in the parent blockmap. 367 */ 368 #define HAMMER2_CHAIN_MODIFIED 0x00000001 /* dirty chain data */ 369 #define HAMMER2_CHAIN_ALLOCATED 0x00000002 /* kmalloc'd chain */ 370 #define HAMMER2_CHAIN_DESTROY 0x00000004 371 #define HAMMER2_CHAIN_DEDUP 0x00000008 /* recorded for dedup */ 372 #define HAMMER2_CHAIN_DELETED 0x00000010 /* deleted chain */ 373 #define HAMMER2_CHAIN_INITIAL 0x00000020 /* initial create */ 374 #define HAMMER2_CHAIN_UPDATE 0x00000040 /* need parent update */ 375 #define HAMMER2_CHAIN_DEFERRED 0x00000080 /* flush depth defer */ 376 #define HAMMER2_CHAIN_TESTEDGOOD 0x00000100 /* crc tested good */ 377 #define HAMMER2_CHAIN_ONFLUSH 0x00000200 /* on a flush list */ 378 #define HAMMER2_CHAIN_FICTITIOUS 0x00000400 /* unsuitable for I/O */ 379 #define HAMMER2_CHAIN_VOLUMESYNC 0x00000800 /* needs volume sync */ 380 #define HAMMER2_CHAIN_DELAYED 0x00001000 /* delayed flush */ 381 #define HAMMER2_CHAIN_COUNTEDBREFS 0x00002000 /* block table stats */ 382 #define HAMMER2_CHAIN_ONRBTREE 0x00004000 /* on parent RB tree */ 383 #define HAMMER2_CHAIN_ONLRU 0x00008000 /* on LRU list */ 384 #define HAMMER2_CHAIN_EMBEDDED 0x00010000 /* embedded data */ 385 #define HAMMER2_CHAIN_RELEASE 0x00020000 /* don't keep around */ 386 #define HAMMER2_CHAIN_BMAPPED 0x00040000 /* present in blkmap */ 387 #define HAMMER2_CHAIN_BMAPUPD 0x00080000 /* +needs updating */ 388 #define HAMMER2_CHAIN_IOINPROG 0x00100000 /* I/O interlock */ 389 #define HAMMER2_CHAIN_IOSIGNAL 0x00200000 /* I/O interlock */ 390 #define HAMMER2_CHAIN_PFSBOUNDARY 0x00400000 /* super->pfs inode */ 391 392 #define HAMMER2_CHAIN_FLUSH_MASK (HAMMER2_CHAIN_MODIFIED | \ 393 HAMMER2_CHAIN_UPDATE | \ 394 HAMMER2_CHAIN_ONFLUSH | \ 395 HAMMER2_CHAIN_DESTROY) 396 397 /* 398 * Hammer2 error codes, used by chain->error and cluster->error. The error 399 * code is typically set on-lock unless no I/O was requested, and set on 400 * I/O otherwise. If set for a cluster it generally means that the cluster 401 * code could not find a valid copy to present. 402 * 403 * IO - An I/O error occurred 404 * CHECK - I/O succeeded but did not match the check code 405 * INCOMPLETE - A cluster is not complete enough to use, or 406 * a chain cannot be loaded because its parent has an error. 407 * 408 * NOTE: API allows callers to check zero/non-zero to determine if an error 409 * condition exists. 410 * 411 * NOTE: Chain's data field is usually NULL on an IO error but not necessarily 412 * NULL on other errors. Check chain->error, not chain->data. 413 */ 414 #define HAMMER2_ERROR_NONE 0 415 #define HAMMER2_ERROR_IO 1 /* device I/O error */ 416 #define HAMMER2_ERROR_CHECK 2 /* check code mismatch */ 417 #define HAMMER2_ERROR_INCOMPLETE 3 /* incomplete cluster */ 418 #define HAMMER2_ERROR_DEPTH 4 /* temporary depth limit */ 419 420 /* 421 * Flags passed to hammer2_chain_lookup() and hammer2_chain_next() 422 * 423 * NOTES: 424 * NOLOCK - Input and output chains are referenced only and not 425 * locked. Output chain might be temporarily locked 426 * internally. 427 * 428 * NODATA - Asks that the chain->data not be resolved in order 429 * to avoid I/O. 430 * 431 * NODIRECT - Prevents a lookup of offset 0 in an inode from returning 432 * the inode itself if the inode is in DIRECTDATA mode 433 * (i.e. file is <= 512 bytes). Used by the synchronization 434 * code to prevent confusion. 435 * 436 * SHARED - The input chain is expected to be locked shared, 437 * and the output chain is locked shared. 438 * 439 * MATCHIND - Allows an indirect block / freemap node to be returned 440 * when the passed key range matches the radix. Remember 441 * that key_end is inclusive (e.g. {0x000,0xFFF}, 442 * not {0x000,0x1000}). 443 * 444 * (Cannot be used for remote or cluster ops). 445 * 446 * ALLNODES - Allows NULL focus. 447 * 448 * ALWAYS - Always resolve the data. If ALWAYS and NODATA are both 449 * missing, bulk file data is not resolved but inodes and 450 * other meta-data will. 451 * 452 * NOUNLOCK - Used by hammer2_chain_next() to leave the lock on 453 * the input chain intact. The chain is still dropped. 454 * This allows the caller to add a reference to the chain 455 * and retain it in a locked state (used by the 456 * XOP/feed/collect code). 457 */ 458 #define HAMMER2_LOOKUP_NOLOCK 0x00000001 /* ref only */ 459 #define HAMMER2_LOOKUP_NODATA 0x00000002 /* data left NULL */ 460 #define HAMMER2_LOOKUP_NODIRECT 0x00000004 /* no offset=0 DD */ 461 #define HAMMER2_LOOKUP_SHARED 0x00000100 462 #define HAMMER2_LOOKUP_MATCHIND 0x00000200 /* return all chains */ 463 #define HAMMER2_LOOKUP_ALLNODES 0x00000400 /* allow NULL focus */ 464 #define HAMMER2_LOOKUP_ALWAYS 0x00000800 /* resolve data */ 465 #define HAMMER2_LOOKUP_NOUNLOCK 0x00001000 /* leave lock intact */ 466 467 /* 468 * Flags passed to hammer2_chain_modify() and hammer2_chain_resize() 469 * 470 * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT 471 * blocks in the INITIAL-create state. 472 */ 473 #define HAMMER2_MODIFY_OPTDATA 0x00000002 /* data can be NULL */ 474 #define HAMMER2_MODIFY_NO_MODIFY_TID 0x00000004 475 #define HAMMER2_MODIFY_UNUSED0008 0x00000008 476 477 /* 478 * Flags passed to hammer2_chain_lock() 479 * 480 * NOTE: RDONLY is set to optimize cluster operations when *no* modifications 481 * will be made to either the cluster being locked or any underlying 482 * cluster. It allows the cluster to lock and access data for a subset 483 * of available nodes instead of all available nodes. 484 */ 485 #define HAMMER2_RESOLVE_NEVER 1 486 #define HAMMER2_RESOLVE_MAYBE 2 487 #define HAMMER2_RESOLVE_ALWAYS 3 488 #define HAMMER2_RESOLVE_MASK 0x0F 489 490 #define HAMMER2_RESOLVE_SHARED 0x10 /* request shared lock */ 491 #define HAMMER2_RESOLVE_LOCKAGAIN 0x20 /* another shared lock */ 492 #define HAMMER2_RESOLVE_RDONLY 0x40 /* higher level op flag */ 493 494 /* 495 * Flags passed to hammer2_chain_delete() 496 */ 497 #define HAMMER2_DELETE_PERMANENT 0x0001 498 499 /* 500 * Flags passed to hammer2_chain_insert() or hammer2_chain_rename() 501 */ 502 #define HAMMER2_INSERT_PFSROOT 0x0004 503 504 /* 505 * Flags passed to hammer2_chain_delete_duplicate() 506 */ 507 #define HAMMER2_DELDUP_RECORE 0x0001 508 509 /* 510 * Cluster different types of storage together for allocations 511 */ 512 #define HAMMER2_FREECACHE_INODE 0 513 #define HAMMER2_FREECACHE_INDIR 1 514 #define HAMMER2_FREECACHE_DATA 2 515 #define HAMMER2_FREECACHE_UNUSED3 3 516 #define HAMMER2_FREECACHE_TYPES 4 517 518 /* 519 * hammer2_freemap_alloc() block preference 520 */ 521 #define HAMMER2_OFF_NOPREF ((hammer2_off_t)-1) 522 523 /* 524 * BMAP read-ahead maximum parameters 525 */ 526 #define HAMMER2_BMAP_COUNT 16 /* max bmap read-ahead */ 527 #define HAMMER2_BMAP_BYTES (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT) 528 529 /* 530 * hammer2_freemap_adjust() 531 */ 532 #define HAMMER2_FREEMAP_DORECOVER 1 533 #define HAMMER2_FREEMAP_DOMAYFREE 2 534 #define HAMMER2_FREEMAP_DOREALFREE 3 535 536 /* 537 * HAMMER2 cluster - A set of chains representing the same entity. 538 * 539 * hammer2_cluster typically represents a temporary set of representitive 540 * chains. The one exception is that a hammer2_cluster is embedded in 541 * hammer2_inode. This embedded cluster is ONLY used to track the 542 * representitive chains and cannot be directly locked. 543 * 544 * A cluster is usually temporary (and thus per-thread) for locking purposes, 545 * allowing us to embed the asynchronous storage required for cluster 546 * operations in the cluster itself and adjust the state and status without 547 * having to worry too much about SMP issues. 548 * 549 * The exception is the cluster embedded in the hammer2_inode structure. 550 * This is used to cache the cluster state on an inode-by-inode basis. 551 * Individual hammer2_chain structures not incorporated into clusters might 552 * also stick around to cache miscellanious elements. 553 * 554 * Because the cluster is a 'working copy' and is usually subject to cluster 555 * quorum rules, it is quite possible for us to end up with an insufficient 556 * number of live chains to execute an operation. If an insufficient number 557 * of chains remain in a working copy, the operation may have to be 558 * downgraded, retried, stall until the requisit number of chains are 559 * available, or possibly even error out depending on the mount type. 560 * 561 * A cluster's focus is set when it is locked. The focus can only be set 562 * to a chain still part of the synchronized set. 563 */ 564 #define HAMMER2_MAXCLUSTER 8 565 #define HAMMER2_XOPMASK_CLUSTER ((1U << HAMMER2_MAXCLUSTER) - 1) 566 #define HAMMER2_XOPFIFO 16 567 #define HAMMER2_XOPFIFO_MASK (HAMMER2_XOPFIFO - 1) 568 #define HAMMER2_XOPGROUPS 32 569 #define HAMMER2_XOPGROUPS_MASK (HAMMER2_XOPGROUPS - 1) 570 #define HAMMER2_XOPMASK_VOP 0x80000000U 571 #define HAMMER2_XOPMASK_FIFOW 0x40000000U 572 573 #define HAMMER2_XOPMASK_ALLDONE (HAMMER2_XOPMASK_VOP | HAMMER2_XOPMASK_CLUSTER) 574 575 #define HAMMER2_SPECTHREADS 1 /* sync */ 576 577 struct hammer2_cluster_item { 578 hammer2_chain_t *chain; 579 int cache_index; 580 int error; 581 uint32_t flags; 582 }; 583 584 typedef struct hammer2_cluster_item hammer2_cluster_item_t; 585 586 /* 587 * INVALID - Invalid for focus, i.e. not part of synchronized set. 588 * Once set, this bit is sticky across operations. 589 * 590 * FEMOD - Indicates that front-end modifying operations can 591 * mess with this entry and MODSYNC will copy also 592 * effect it. 593 */ 594 #define HAMMER2_CITEM_INVALID 0x00000001 595 #define HAMMER2_CITEM_FEMOD 0x00000002 596 #define HAMMER2_CITEM_NULL 0x00000004 597 598 struct hammer2_cluster { 599 int refs; /* track for deallocation */ 600 int ddflag; 601 struct hammer2_pfs *pmp; 602 uint32_t flags; 603 int nchains; 604 int error; /* error code valid on lock */ 605 int focus_index; 606 hammer2_iocb_t iocb; 607 hammer2_chain_t *focus; /* current focus (or mod) */ 608 hammer2_cluster_item_t array[HAMMER2_MAXCLUSTER]; 609 }; 610 611 typedef struct hammer2_cluster hammer2_cluster_t; 612 613 /* 614 * WRHARD - Hard mounts can write fully synchronized 615 * RDHARD - Hard mounts can read fully synchronized 616 * UNHARD - Unsynchronized masters present 617 * NOHARD - No masters visible 618 * WRSOFT - Soft mounts can write to at least the SOFT_MASTER 619 * RDSOFT - Soft mounts can read from at least a SOFT_SLAVE 620 * UNSOFT - Unsynchronized slaves present 621 * NOSOFT - No slaves visible 622 * RDSLAVE - slaves are accessible (possibly unsynchronized or remote). 623 * MSYNCED - All masters are fully synchronized 624 * SSYNCED - All known local slaves are fully synchronized to masters 625 * 626 * All available masters are always incorporated. All PFSs belonging to a 627 * cluster (master, slave, copy, whatever) always try to synchronize the 628 * total number of known masters in the PFSs root inode. 629 * 630 * A cluster might have access to many slaves, copies, or caches, but we 631 * have a limited number of cluster slots. Any such elements which are 632 * directly mounted from block device(s) will always be incorporated. Note 633 * that SSYNCED only applies to such elements which are directly mounted, 634 * not to any remote slaves, copies, or caches that could be available. These 635 * bits are used to monitor and drive our synchronization threads. 636 * 637 * When asking the question 'is any data accessible at all', then a simple 638 * test against (RDHARD|RDSOFT|RDSLAVE) gives you the answer. If any of 639 * these bits are set the object can be read with certain caveats: 640 * RDHARD - no caveats. RDSOFT - authoritative but might not be synchronized. 641 * and RDSLAVE - not authoritative, has some data but it could be old or 642 * incomplete. 643 * 644 * When both soft and hard mounts are available, data will be read and written 645 * via the soft mount only. But all might be in the cluster because 646 * background synchronization threads still need to do their work. 647 */ 648 #define HAMMER2_CLUSTER_INODE 0x00000001 /* embedded in inode struct */ 649 #define HAMMER2_CLUSTER_UNUSED2 0x00000002 650 #define HAMMER2_CLUSTER_LOCKED 0x00000004 /* cluster lks not recursive */ 651 #define HAMMER2_CLUSTER_WRHARD 0x00000100 /* hard-mount can write */ 652 #define HAMMER2_CLUSTER_RDHARD 0x00000200 /* hard-mount can read */ 653 #define HAMMER2_CLUSTER_UNHARD 0x00000400 /* unsynchronized masters */ 654 #define HAMMER2_CLUSTER_NOHARD 0x00000800 /* no masters visible */ 655 #define HAMMER2_CLUSTER_WRSOFT 0x00001000 /* soft-mount can write */ 656 #define HAMMER2_CLUSTER_RDSOFT 0x00002000 /* soft-mount can read */ 657 #define HAMMER2_CLUSTER_UNSOFT 0x00004000 /* unsynchronized slaves */ 658 #define HAMMER2_CLUSTER_NOSOFT 0x00008000 /* no slaves visible */ 659 #define HAMMER2_CLUSTER_MSYNCED 0x00010000 /* all masters synchronized */ 660 #define HAMMER2_CLUSTER_SSYNCED 0x00020000 /* known slaves synchronized */ 661 662 #define HAMMER2_CLUSTER_ANYDATA ( HAMMER2_CLUSTER_RDHARD | \ 663 HAMMER2_CLUSTER_RDSOFT | \ 664 HAMMER2_CLUSTER_RDSLAVE) 665 666 #define HAMMER2_CLUSTER_RDOK ( HAMMER2_CLUSTER_RDHARD | \ 667 HAMMER2_CLUSTER_RDSOFT) 668 669 #define HAMMER2_CLUSTER_WROK ( HAMMER2_CLUSTER_WRHARD | \ 670 HAMMER2_CLUSTER_WRSOFT) 671 672 #define HAMMER2_CLUSTER_ZFLAGS ( HAMMER2_CLUSTER_WRHARD | \ 673 HAMMER2_CLUSTER_RDHARD | \ 674 HAMMER2_CLUSTER_WRSOFT | \ 675 HAMMER2_CLUSTER_RDSOFT | \ 676 HAMMER2_CLUSTER_MSYNCED | \ 677 HAMMER2_CLUSTER_SSYNCED) 678 679 /* 680 * Helper functions (cluster must be locked for flags to be valid). 681 */ 682 static __inline 683 int 684 hammer2_cluster_rdok(hammer2_cluster_t *cluster) 685 { 686 return (cluster->flags & HAMMER2_CLUSTER_RDOK); 687 } 688 689 static __inline 690 int 691 hammer2_cluster_wrok(hammer2_cluster_t *cluster) 692 { 693 return (cluster->flags & HAMMER2_CLUSTER_WROK); 694 } 695 696 RB_HEAD(hammer2_inode_tree, hammer2_inode); 697 698 /* 699 * A hammer2 inode. 700 * 701 * NOTE: The inode-embedded cluster is never used directly for I/O (since 702 * it may be shared). Instead it will be replicated-in and synchronized 703 * back out if changed. 704 */ 705 struct hammer2_inode { 706 RB_ENTRY(hammer2_inode) rbnode; /* inumber lookup (HL) */ 707 hammer2_mtx_t lock; /* inode lock */ 708 hammer2_mtx_t truncate_lock; /* prevent truncates */ 709 struct hammer2_pfs *pmp; /* PFS mount */ 710 struct vnode *vp; 711 struct spinlock cluster_spin; /* update cluster */ 712 hammer2_cluster_t cluster; 713 struct lockf advlock; 714 u_int flags; 715 u_int refs; /* +vpref, +flushref */ 716 uint8_t comp_heuristic; 717 hammer2_inode_meta_t meta; /* copy of meta-data */ 718 hammer2_off_t osize; 719 hammer2_cluster_t *cluster_cache; 720 }; 721 722 typedef struct hammer2_inode hammer2_inode_t; 723 724 /* 725 * MODIFIED - Inode is in a modified state, ip->meta may have changes. 726 * RESIZED - Inode truncated (any) or inode extended beyond 727 * EMBEDDED_BYTES. 728 */ 729 #define HAMMER2_INODE_MODIFIED 0x0001 730 #define HAMMER2_INODE_SROOT 0x0002 /* kmalloc special case */ 731 #define HAMMER2_INODE_RENAME_INPROG 0x0004 732 #define HAMMER2_INODE_ONRBTREE 0x0008 733 #define HAMMER2_INODE_RESIZED 0x0010 /* requires inode_fsync */ 734 #define HAMMER2_INODE_ISDELETED 0x0020 /* deleted */ 735 #define HAMMER2_INODE_ISUNLINKED 0x0040 736 #define HAMMER2_INODE_METAGOOD 0x0080 /* inode meta-data good */ 737 #define HAMMER2_INODE_ONSIDEQ 0x0100 /* on side processing queue */ 738 739 int hammer2_inode_cmp(hammer2_inode_t *ip1, hammer2_inode_t *ip2); 740 RB_PROTOTYPE2(hammer2_inode_tree, hammer2_inode, rbnode, hammer2_inode_cmp, 741 hammer2_tid_t); 742 743 /* 744 * inode-unlink side-structure 745 */ 746 struct hammer2_inode_sideq { 747 TAILQ_ENTRY(hammer2_inode_sideq) entry; 748 hammer2_inode_t *ip; 749 }; 750 TAILQ_HEAD(h2_sideq_list, hammer2_inode_sideq); 751 752 typedef struct hammer2_inode_sideq hammer2_inode_sideq_t; 753 754 /* 755 * Transaction management sub-structure under hammer2_pfs 756 */ 757 struct hammer2_trans { 758 uint32_t flags; 759 uint32_t sync_wait; 760 }; 761 762 typedef struct hammer2_trans hammer2_trans_t; 763 764 #define HAMMER2_TRANS_ISFLUSH 0x80000000 /* flush code */ 765 #define HAMMER2_TRANS_BUFCACHE 0x40000000 /* bio strategy */ 766 #define HAMMER2_TRANS_PREFLUSH 0x20000000 /* preflush state */ 767 #define HAMMER2_TRANS_FPENDING 0x10000000 /* flush pending */ 768 #define HAMMER2_TRANS_WAITING 0x08000000 /* someone waiting */ 769 #define HAMMER2_TRANS_MASK 0x00FFFFFF /* count mask */ 770 771 #define HAMMER2_FREEMAP_HEUR_NRADIX 4 /* pwr 2 PBUFRADIX-MINIORADIX */ 772 #define HAMMER2_FREEMAP_HEUR_TYPES 8 773 #define HAMMER2_FREEMAP_HEUR_SIZE (HAMMER2_FREEMAP_HEUR_NRADIX * \ 774 HAMMER2_FREEMAP_HEUR_TYPES) 775 776 #define HAMMER2_DEDUP_HEUR_SIZE 65536 777 #define HAMMER2_DEDUP_HEUR_MASK (HAMMER2_DEDUP_HEUR_SIZE - 1) 778 779 #define HAMMER2_FLUSH_TOP 0x0001 780 #define HAMMER2_FLUSH_ALL 0x0002 781 782 783 /* 784 * Hammer2 support thread element. 785 * 786 * Potentially many support threads can hang off of hammer2, primarily 787 * off the hammer2_pfs structure. Typically: 788 * 789 * td x Nodes A synchronization thread for each node. 790 * td x Nodes x workers Worker threads for frontend operations. 791 * td x 1 Bioq thread for logical buffer writes. 792 * 793 * In addition, the synchronization thread(s) associated with the 794 * super-root PFS (spmp) for a node is responsible for automatic bulkfree 795 * and dedup scans. 796 */ 797 struct hammer2_thread { 798 struct hammer2_pfs *pmp; 799 hammer2_xop_list_t *xopq; /* points into pmp->xopq[] */ 800 thread_t td; 801 uint32_t flags; 802 int depth; 803 int clindex; /* cluster element index */ 804 int repidx; 805 }; 806 807 typedef struct hammer2_thread hammer2_thread_t; 808 809 #define HAMMER2_THREAD_UNMOUNTING 0x0001 /* unmount request */ 810 #define HAMMER2_THREAD_DEV 0x0002 /* related to dev, not pfs */ 811 #define HAMMER2_THREAD_WAITING 0x0004 /* thread in idle tsleep */ 812 #define HAMMER2_THREAD_REMASTER 0x0008 /* remaster request */ 813 #define HAMMER2_THREAD_STOP 0x0010 /* exit request */ 814 #define HAMMER2_THREAD_FREEZE 0x0020 /* force idle */ 815 #define HAMMER2_THREAD_FROZEN 0x0040 /* thread is frozen */ 816 #define HAMMER2_THREAD_XOPQ 0x0080 /* work pending */ 817 #define HAMMER2_THREAD_STOPPED 0x0100 /* thread has stopped */ 818 #define HAMMER2_THREAD_UNFREEZE 0x0200 819 #define HAMMER2_THREAD_CLIENTWAIT 0x0400 820 821 #define HAMMER2_THREAD_WAKEUP_MASK (HAMMER2_THREAD_UNMOUNTING | \ 822 HAMMER2_THREAD_REMASTER | \ 823 HAMMER2_THREAD_STOP | \ 824 HAMMER2_THREAD_FREEZE | \ 825 HAMMER2_THREAD_XOPQ) 826 827 /* 828 * Support structure for dedup heuristic. 829 */ 830 struct hammer2_dedup { 831 hammer2_off_t data_off; 832 uint64_t data_crc; 833 uint32_t ticks; 834 uint32_t unused03; 835 }; 836 837 typedef struct hammer2_dedup hammer2_dedup_t; 838 839 /* 840 * hammer2_xop - container for VOP/XOP operation (allocated, not on stack). 841 * 842 * This structure is used to distribute a VOP operation across multiple 843 * nodes. It provides a rendezvous for concurrent node execution and 844 * can be detached from the frontend operation to allow the frontend to 845 * return early. 846 * 847 * This structure also sequences operations on up to three inodes. 848 */ 849 typedef void (*hammer2_xop_func_t)(union hammer2_xop *xop, int clidx); 850 851 struct hammer2_xop_fifo { 852 TAILQ_ENTRY(hammer2_xop_head) entry; 853 hammer2_chain_t *array[HAMMER2_XOPFIFO]; 854 int errors[HAMMER2_XOPFIFO]; 855 int ri; 856 int wi; 857 int flags; 858 }; 859 860 typedef struct hammer2_xop_fifo hammer2_xop_fifo_t; 861 862 #define HAMMER2_XOP_FIFO_RUN 0x0001 863 #define HAMMER2_XOP_FIFO_STALL 0x0002 864 865 struct hammer2_xop_head { 866 hammer2_xop_func_t func; 867 hammer2_tid_t mtid; 868 struct hammer2_inode *ip1; 869 struct hammer2_inode *ip2; 870 struct hammer2_inode *ip3; 871 uint32_t check_counter; 872 uint32_t run_mask; 873 uint32_t chk_mask; 874 int flags; 875 int state; 876 int error; 877 hammer2_key_t collect_key; 878 char *name1; 879 size_t name1_len; 880 char *name2; 881 size_t name2_len; 882 hammer2_xop_fifo_t collect[HAMMER2_MAXCLUSTER]; 883 hammer2_cluster_t cluster; /* help collections */ 884 }; 885 886 typedef struct hammer2_xop_head hammer2_xop_head_t; 887 888 struct hammer2_xop_ipcluster { 889 hammer2_xop_head_t head; 890 }; 891 892 struct hammer2_xop_strategy { 893 hammer2_xop_head_t head; 894 hammer2_key_t lbase; 895 int finished; 896 hammer2_mtx_t lock; 897 struct bio *bio; 898 }; 899 900 struct hammer2_xop_readdir { 901 hammer2_xop_head_t head; 902 hammer2_key_t lkey; 903 }; 904 905 struct hammer2_xop_nresolve { 906 hammer2_xop_head_t head; 907 hammer2_key_t lhc; /* if name is NULL used lhc */ 908 }; 909 910 struct hammer2_xop_nlink { 911 hammer2_xop_head_t head; 912 int nlinks_delta; 913 }; 914 915 struct hammer2_xop_unlink { 916 hammer2_xop_head_t head; 917 int isdir; 918 int dopermanent; 919 }; 920 921 struct hammer2_xop_nrename { 922 hammer2_xop_head_t head; 923 hammer2_tid_t lhc; 924 int ip_key; 925 }; 926 927 struct hammer2_xop_scanlhc { 928 hammer2_xop_head_t head; 929 hammer2_key_t lhc; 930 }; 931 932 struct hammer2_xop_scanall { 933 hammer2_xop_head_t head; 934 hammer2_key_t key_beg; /* inclusive */ 935 hammer2_key_t key_end; /* inclusive */ 936 int resolve_flags; 937 int lookup_flags; 938 }; 939 940 struct hammer2_xop_lookup { 941 hammer2_xop_head_t head; 942 hammer2_key_t lhc; 943 }; 944 945 struct hammer2_xop_create { 946 hammer2_xop_head_t head; 947 hammer2_inode_meta_t meta; /* initial metadata */ 948 hammer2_key_t lhc; 949 int flags; 950 }; 951 952 struct hammer2_xop_destroy { 953 hammer2_xop_head_t head; 954 }; 955 956 struct hammer2_xop_fsync { 957 hammer2_xop_head_t head; 958 hammer2_inode_meta_t meta; 959 hammer2_off_t osize; 960 u_int ipflags; 961 int clear_directdata; 962 }; 963 964 struct hammer2_xop_unlinkall { 965 hammer2_xop_head_t head; 966 hammer2_key_t key_beg; 967 hammer2_key_t key_end; 968 }; 969 970 struct hammer2_xop_connect { 971 hammer2_xop_head_t head; 972 hammer2_key_t lhc; 973 }; 974 975 struct hammer2_xop_flush { 976 hammer2_xop_head_t head; 977 }; 978 979 typedef struct hammer2_xop_readdir hammer2_xop_readdir_t; 980 typedef struct hammer2_xop_nresolve hammer2_xop_nresolve_t; 981 typedef struct hammer2_xop_nlink hammer2_xop_nlink_t; 982 typedef struct hammer2_xop_unlink hammer2_xop_unlink_t; 983 typedef struct hammer2_xop_nrename hammer2_xop_nrename_t; 984 typedef struct hammer2_xop_ipcluster hammer2_xop_ipcluster_t; 985 typedef struct hammer2_xop_strategy hammer2_xop_strategy_t; 986 typedef struct hammer2_xop_create hammer2_xop_create_t; 987 typedef struct hammer2_xop_destroy hammer2_xop_destroy_t; 988 typedef struct hammer2_xop_fsync hammer2_xop_fsync_t; 989 typedef struct hammer2_xop_unlinkall hammer2_xop_unlinkall_t; 990 typedef struct hammer2_xop_scanlhc hammer2_xop_scanlhc_t; 991 typedef struct hammer2_xop_scanall hammer2_xop_scanall_t; 992 typedef struct hammer2_xop_lookup hammer2_xop_lookup_t; 993 typedef struct hammer2_xop_connect hammer2_xop_connect_t; 994 typedef struct hammer2_xop_flush hammer2_xop_flush_t; 995 996 union hammer2_xop { 997 hammer2_xop_head_t head; 998 hammer2_xop_ipcluster_t xop_ipcluster; 999 hammer2_xop_readdir_t xop_readdir; 1000 hammer2_xop_nresolve_t xop_nresolve; 1001 hammer2_xop_nlink_t xop_nlink; 1002 hammer2_xop_unlink_t xop_unlink; 1003 hammer2_xop_nrename_t xop_nrename; 1004 hammer2_xop_strategy_t xop_strategy; 1005 hammer2_xop_create_t xop_create; 1006 hammer2_xop_destroy_t xop_destroy; 1007 hammer2_xop_fsync_t xop_fsync; 1008 hammer2_xop_unlinkall_t xop_unlinkall; 1009 hammer2_xop_scanlhc_t xop_scanlhc; 1010 hammer2_xop_scanall_t xop_scanall; 1011 hammer2_xop_lookup_t xop_lookup; 1012 hammer2_xop_flush_t xop_flush; 1013 hammer2_xop_connect_t xop_connect; 1014 }; 1015 1016 typedef union hammer2_xop hammer2_xop_t; 1017 1018 /* 1019 * hammer2_xop_group - Manage XOP support threads. 1020 */ 1021 struct hammer2_xop_group { 1022 hammer2_thread_t thrs[HAMMER2_MAXCLUSTER]; 1023 }; 1024 1025 typedef struct hammer2_xop_group hammer2_xop_group_t; 1026 1027 /* 1028 * flags to hammer2_xop_collect() 1029 */ 1030 #define HAMMER2_XOP_COLLECT_NOWAIT 0x00000001 1031 #define HAMMER2_XOP_COLLECT_WAITALL 0x00000002 1032 1033 /* 1034 * flags to hammer2_xop_alloc() 1035 * 1036 * MODIFYING - This is a modifying transaction, allocate a mtid. 1037 */ 1038 #define HAMMER2_XOP_MODIFYING 0x00000001 1039 #define HAMMER2_XOP_ITERATOR 0x00000002 1040 1041 /* 1042 * Global (per partition) management structure, represents a hard block 1043 * device. Typically referenced by hammer2_chain structures when applicable. 1044 * Typically not used for network-managed elements. 1045 * 1046 * Note that a single hammer2_dev can be indirectly tied to multiple system 1047 * mount points. There is no direct relationship. System mounts are 1048 * per-cluster-id, not per-block-device, and a single hard mount might contain 1049 * many PFSs and those PFSs might combine together in various ways to form 1050 * the set of available clusters. 1051 */ 1052 struct hammer2_dev { 1053 struct vnode *devvp; /* device vnode */ 1054 int ronly; /* read-only mount */ 1055 int mount_count; /* number of actively mounted PFSs */ 1056 TAILQ_ENTRY(hammer2_dev) mntentry; /* hammer2_mntlist */ 1057 1058 struct malloc_type *mchain; 1059 int nipstacks; 1060 int maxipstacks; 1061 kdmsg_iocom_t iocom; /* volume-level dmsg interface */ 1062 struct spinlock io_spin; /* iotree access */ 1063 struct hammer2_io_tree iotree; 1064 int iofree_count; 1065 hammer2_chain_t vchain; /* anchor chain (topology) */ 1066 hammer2_chain_t fchain; /* anchor chain (freemap) */ 1067 struct spinlock list_spin; 1068 struct h2_flush_list flushq; /* flush seeds */ 1069 struct hammer2_pfs *spmp; /* super-root pmp for transactions */ 1070 struct lock bulklk; /* bulkfree lock */ 1071 struct lock vollk; /* lockmgr lock */ 1072 hammer2_off_t heur_freemap[HAMMER2_FREEMAP_HEUR_SIZE]; 1073 hammer2_dedup_t heur_dedup[HAMMER2_DEDUP_HEUR_SIZE]; 1074 int volhdrno; /* last volhdrno written */ 1075 int hflags; /* HMNT2 flags applicable to device */ 1076 char devrepname[64]; /* for kprintf */ 1077 hammer2_volume_data_t voldata; 1078 hammer2_volume_data_t volsync; /* synchronized voldata */ 1079 }; 1080 1081 typedef struct hammer2_dev hammer2_dev_t; 1082 1083 /* 1084 * Helper functions (cluster must be locked for flags to be valid). 1085 */ 1086 static __inline 1087 int 1088 hammer2_chain_rdok(hammer2_chain_t *chain) 1089 { 1090 return (chain->error == 0); 1091 } 1092 1093 static __inline 1094 int 1095 hammer2_chain_wrok(hammer2_chain_t *chain) 1096 { 1097 return (chain->error == 0 && chain->hmp->ronly == 0); 1098 } 1099 1100 /* 1101 * Per-cluster management structure. This structure will be tied to a 1102 * system mount point if the system is mounting the PFS, but is also used 1103 * to manage clusters encountered during the super-root scan or received 1104 * via LNK_SPANs that might not be mounted. 1105 * 1106 * This structure is also used to represent the super-root that hangs off 1107 * of a hard mount point. The super-root is not really a cluster element. 1108 * In this case the spmp_hmp field will be non-NULL. It's just easier to do 1109 * this than to special case super-root manipulation in the hammer2_chain* 1110 * code as being only hammer2_dev-related. 1111 * 1112 * pfs_mode and pfs_nmasters are rollup fields which critically describes 1113 * how elements of the cluster act on the cluster. pfs_mode is only applicable 1114 * when a PFS is mounted by the system. pfs_nmasters is our best guess as to 1115 * how many masters have been configured for a cluster and is always 1116 * applicable. pfs_types[] is an array with 1:1 correspondance to the 1117 * iroot cluster and describes the PFS types of the nodes making up the 1118 * cluster. 1119 * 1120 * WARNING! Portions of this structure have deferred initialization. In 1121 * particular, if not mounted there will be no wthread. 1122 * umounted network PFSs will also be missing iroot and numerous 1123 * other fields will not be initialized prior to mount. 1124 * 1125 * Synchronization threads are chain-specific and only applicable 1126 * to local hard PFS entries. A hammer2_pfs structure may contain 1127 * more than one when multiple hard PFSs are present on the local 1128 * machine which require synchronization monitoring. Most PFSs 1129 * (such as snapshots) are 1xMASTER PFSs which do not need a 1130 * synchronization thread. 1131 * 1132 * WARNING! The chains making up pfs->iroot's cluster are accounted for in 1133 * hammer2_dev->mount_count when the pfs is associated with a mount 1134 * point. 1135 */ 1136 struct hammer2_pfs { 1137 struct mount *mp; 1138 TAILQ_ENTRY(hammer2_pfs) mntentry; /* hammer2_pfslist */ 1139 uuid_t pfs_clid; 1140 hammer2_dev_t *spmp_hmp; /* only if super-root pmp */ 1141 hammer2_dev_t *force_local; /* only if 'local' mount */ 1142 hammer2_inode_t *iroot; /* PFS root inode */ 1143 uint8_t pfs_types[HAMMER2_MAXCLUSTER]; 1144 char *pfs_names[HAMMER2_MAXCLUSTER]; 1145 hammer2_dev_t *pfs_hmps[HAMMER2_MAXCLUSTER]; 1146 hammer2_trans_t trans; 1147 struct lock lock; /* PFS lock for certain ops */ 1148 struct lock lock_nlink; /* rename and nlink lock */ 1149 struct netexport export; /* nfs export */ 1150 int ronly; /* read-only mount */ 1151 int hflags; /* pfs-specific mount flags */ 1152 struct malloc_type *minode; 1153 struct malloc_type *mmsg; 1154 struct spinlock inum_spin; /* inumber lookup */ 1155 struct hammer2_inode_tree inum_tree; /* (not applicable to spmp) */ 1156 struct spinlock lru_spin; /* inumber lookup */ 1157 struct hammer2_chain_list lru_list; /* chains on LRU */ 1158 int lru_count; /* #of chains on LRU */ 1159 hammer2_tid_t modify_tid; /* modify transaction id */ 1160 hammer2_tid_t inode_tid; /* inode allocator */ 1161 uint8_t pfs_nmasters; /* total masters */ 1162 uint8_t pfs_mode; /* operating mode PFSMODE */ 1163 uint8_t unused01; 1164 uint8_t unused02; 1165 int xop_iterator; 1166 long inmem_inodes; 1167 uint32_t inmem_dirty_chains; 1168 int count_lwinprog; /* logical write in prog */ 1169 struct spinlock list_spin; 1170 struct h2_sideq_list sideq; /* last-close dirty/unlink */ 1171 hammer2_thread_t sync_thrs[HAMMER2_MAXCLUSTER]; 1172 uint32_t cluster_flags; /* cached cluster flags */ 1173 int has_xop_threads; 1174 struct spinlock xop_spin; /* xop sequencer */ 1175 hammer2_xop_group_t xop_groups[HAMMER2_XOPGROUPS]; 1176 hammer2_xop_list_t xopq[HAMMER2_MAXCLUSTER][HAMMER2_XOPGROUPS+ 1177 HAMMER2_SPECTHREADS]; 1178 }; 1179 1180 typedef struct hammer2_pfs hammer2_pfs_t; 1181 1182 #define HAMMER2_LRU_LIMIT 1024 /* per pmp lru_list */ 1183 1184 #define HAMMER2_DIRTYCHAIN_WAITING 0x80000000 1185 #define HAMMER2_DIRTYCHAIN_MASK 0x7FFFFFFF 1186 1187 #define HAMMER2_LWINPROG_WAITING 0x80000000 1188 #define HAMMER2_LWINPROG_WAITING0 0x40000000 1189 #define HAMMER2_LWINPROG_MASK 0x3FFFFFFF 1190 1191 /* 1192 * hammer2_cluster_check 1193 */ 1194 #define HAMMER2_CHECK_NULL 0x00000001 1195 1196 /* 1197 * Bulkscan 1198 */ 1199 #define HAMMER2_BULK_ABORT 0x00000001 1200 1201 /* 1202 * Misc 1203 */ 1204 #if defined(_KERNEL) 1205 1206 MALLOC_DECLARE(M_HAMMER2); 1207 1208 #define VTOI(vp) ((hammer2_inode_t *)(vp)->v_data) 1209 #define ITOV(ip) ((ip)->vp) 1210 1211 /* 1212 * Currently locked chains retain the locked buffer cache buffer for 1213 * indirect blocks, and indirect blocks can be one of two sizes. The 1214 * device buffer has to match the case to avoid deadlocking recursive 1215 * chains that might otherwise try to access different offsets within 1216 * the same device buffer. 1217 */ 1218 static __inline 1219 int 1220 hammer2_devblkradix(int radix) 1221 { 1222 #if 0 1223 if (radix <= HAMMER2_LBUFRADIX) { 1224 return (HAMMER2_LBUFRADIX); 1225 } else { 1226 return (HAMMER2_PBUFRADIX); 1227 } 1228 #endif 1229 return (HAMMER2_PBUFRADIX); 1230 } 1231 1232 /* 1233 * XXX almost time to remove this. DIO uses PBUFSIZE exclusively now. 1234 */ 1235 static __inline 1236 size_t 1237 hammer2_devblksize(size_t bytes) 1238 { 1239 #if 0 1240 if (bytes <= HAMMER2_LBUFSIZE) { 1241 return(HAMMER2_LBUFSIZE); 1242 } else { 1243 KKASSERT(bytes <= HAMMER2_PBUFSIZE && 1244 (bytes ^ (bytes - 1)) == ((bytes << 1) - 1)); 1245 return (HAMMER2_PBUFSIZE); 1246 } 1247 #endif 1248 return (HAMMER2_PBUFSIZE); 1249 } 1250 1251 1252 static __inline 1253 hammer2_pfs_t * 1254 MPTOPMP(struct mount *mp) 1255 { 1256 return ((hammer2_pfs_t *)mp->mnt_data); 1257 } 1258 1259 #define LOCKSTART int __nlocks = curthread->td_locks 1260 #define LOCKENTER (++curthread->td_locks) 1261 #define LOCKEXIT (--curthread->td_locks) 1262 #define LOCKSTOP KKASSERT(curthread->td_locks == __nlocks) 1263 1264 extern struct vop_ops hammer2_vnode_vops; 1265 extern struct vop_ops hammer2_spec_vops; 1266 extern struct vop_ops hammer2_fifo_vops; 1267 1268 extern int hammer2_debug; 1269 extern int hammer2_cluster_read; 1270 extern int hammer2_cluster_write; 1271 extern int hammer2_dedup_enable; 1272 extern int hammer2_inval_enable; 1273 extern int hammer2_flush_pipe; 1274 extern int hammer2_synchronous_flush; 1275 extern int hammer2_dio_count; 1276 extern long hammer2_chain_allocs; 1277 extern long hammer2_chain_frees; 1278 extern long hammer2_limit_dirty_chains; 1279 extern long hammer2_count_modified_chains; 1280 extern long hammer2_iod_invals; 1281 extern long hammer2_iod_file_read; 1282 extern long hammer2_iod_meta_read; 1283 extern long hammer2_iod_indr_read; 1284 extern long hammer2_iod_fmap_read; 1285 extern long hammer2_iod_volu_read; 1286 extern long hammer2_iod_file_write; 1287 extern long hammer2_iod_file_wembed; 1288 extern long hammer2_iod_file_wzero; 1289 extern long hammer2_iod_file_wdedup; 1290 extern long hammer2_iod_meta_write; 1291 extern long hammer2_iod_indr_write; 1292 extern long hammer2_iod_fmap_write; 1293 extern long hammer2_iod_volu_write; 1294 1295 extern long hammer2_check_xxhash64; 1296 extern long hammer2_check_icrc32; 1297 1298 extern struct objcache *cache_buffer_read; 1299 extern struct objcache *cache_buffer_write; 1300 extern struct objcache *cache_xops; 1301 1302 /* 1303 * hammer2_subr.c 1304 */ 1305 #define hammer2_icrc32(buf, size) iscsi_crc32((buf), (size)) 1306 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc)) 1307 1308 int hammer2_signal_check(time_t *timep); 1309 const char *hammer2_error_str(int error); 1310 1311 void hammer2_inode_lock(hammer2_inode_t *ip, int how); 1312 void hammer2_inode_unlock(hammer2_inode_t *ip); 1313 hammer2_chain_t *hammer2_inode_chain(hammer2_inode_t *ip, int clindex, int how); 1314 hammer2_chain_t *hammer2_inode_chain_and_parent(hammer2_inode_t *ip, 1315 int clindex, hammer2_chain_t **parentp, int how); 1316 hammer2_mtx_state_t hammer2_inode_lock_temp_release(hammer2_inode_t *ip); 1317 void hammer2_inode_lock_temp_restore(hammer2_inode_t *ip, 1318 hammer2_mtx_state_t ostate); 1319 int hammer2_inode_lock_upgrade(hammer2_inode_t *ip); 1320 void hammer2_inode_lock_downgrade(hammer2_inode_t *ip, int); 1321 1322 void hammer2_dev_exlock(hammer2_dev_t *hmp); 1323 void hammer2_dev_shlock(hammer2_dev_t *hmp); 1324 void hammer2_dev_unlock(hammer2_dev_t *hmp); 1325 1326 int hammer2_get_dtype(const hammer2_inode_data_t *ipdata); 1327 int hammer2_get_vtype(uint8_t type); 1328 uint8_t hammer2_get_obj_type(enum vtype vtype); 1329 void hammer2_time_to_timespec(uint64_t xtime, struct timespec *ts); 1330 uint64_t hammer2_timespec_to_time(const struct timespec *ts); 1331 uint32_t hammer2_to_unix_xid(const uuid_t *uuid); 1332 void hammer2_guid_to_uuid(uuid_t *uuid, uint32_t guid); 1333 void hammer2_trans_manage_init(hammer2_pfs_t *pmp); 1334 1335 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len); 1336 int hammer2_getradix(size_t bytes); 1337 1338 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff, 1339 hammer2_key_t *lbasep, hammer2_key_t *leofp); 1340 int hammer2_calc_physical(hammer2_inode_t *ip, hammer2_key_t lbase); 1341 void hammer2_update_time(uint64_t *timep); 1342 void hammer2_adjreadcounter(hammer2_blockref_t *bref, size_t bytes); 1343 1344 /* 1345 * hammer2_inode.c 1346 */ 1347 struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp); 1348 hammer2_inode_t *hammer2_inode_lookup(hammer2_pfs_t *pmp, 1349 hammer2_tid_t inum); 1350 hammer2_inode_t *hammer2_inode_get(hammer2_pfs_t *pmp, hammer2_inode_t *dip, 1351 hammer2_cluster_t *cluster, int idx); 1352 void hammer2_inode_free(hammer2_inode_t *ip); 1353 void hammer2_inode_ref(hammer2_inode_t *ip); 1354 void hammer2_inode_drop(hammer2_inode_t *ip); 1355 void hammer2_inode_repoint(hammer2_inode_t *ip, hammer2_inode_t *pip, 1356 hammer2_cluster_t *cluster); 1357 void hammer2_inode_repoint_one(hammer2_inode_t *ip, hammer2_cluster_t *cluster, 1358 int idx); 1359 void hammer2_inode_modify(hammer2_inode_t *ip); 1360 void hammer2_inode_run_sideq(hammer2_pfs_t *pmp); 1361 1362 hammer2_inode_t *hammer2_inode_create(hammer2_inode_t *dip, 1363 hammer2_inode_t *pip, 1364 struct vattr *vap, struct ucred *cred, 1365 const uint8_t *name, size_t name_len, hammer2_key_t lhc, 1366 hammer2_key_t inum, uint8_t type, uint8_t target_type, 1367 int flags, int *errorp); 1368 void hammer2_inode_chain_sync(hammer2_inode_t *ip); 1369 int hammer2_inode_unlink_finisher(hammer2_inode_t *ip, int isopen); 1370 1371 /* 1372 * hammer2_chain.c 1373 */ 1374 void hammer2_voldata_lock(hammer2_dev_t *hmp); 1375 void hammer2_voldata_unlock(hammer2_dev_t *hmp); 1376 void hammer2_voldata_modify(hammer2_dev_t *hmp); 1377 hammer2_chain_t *hammer2_chain_alloc(hammer2_dev_t *hmp, 1378 hammer2_pfs_t *pmp, 1379 hammer2_blockref_t *bref); 1380 void hammer2_chain_core_init(hammer2_chain_t *chain); 1381 void hammer2_chain_ref(hammer2_chain_t *chain); 1382 void hammer2_chain_ref_hold(hammer2_chain_t *chain); 1383 void hammer2_chain_drop(hammer2_chain_t *chain); 1384 void hammer2_chain_drop_unhold(hammer2_chain_t *chain); 1385 void hammer2_chain_lock(hammer2_chain_t *chain, int how); 1386 void hammer2_chain_lock_unhold(hammer2_chain_t *chain, int how); 1387 #if 0 1388 void hammer2_chain_push_shared_lock(hammer2_chain_t *chain); 1389 void hammer2_chain_pull_shared_lock(hammer2_chain_t *chain); 1390 #endif 1391 void hammer2_chain_load_data(hammer2_chain_t *chain); 1392 const hammer2_media_data_t *hammer2_chain_rdata(hammer2_chain_t *chain); 1393 hammer2_media_data_t *hammer2_chain_wdata(hammer2_chain_t *chain); 1394 int hammer2_chain_snapshot(hammer2_chain_t *chain, hammer2_ioc_pfs_t *pmp, 1395 hammer2_tid_t mtid); 1396 1397 int hammer2_chain_hardlink_find(hammer2_chain_t **parentp, 1398 hammer2_chain_t **chainp, 1399 int clindex, int flags); 1400 void hammer2_chain_modify(hammer2_chain_t *chain, hammer2_tid_t mtid, 1401 hammer2_off_t dedup_off, int flags); 1402 void hammer2_chain_modify_ip(hammer2_inode_t *ip, hammer2_chain_t *chain, 1403 hammer2_tid_t mtid, int flags); 1404 void hammer2_chain_resize(hammer2_inode_t *ip, hammer2_chain_t *parent, 1405 hammer2_chain_t *chain, 1406 hammer2_tid_t mtid, hammer2_off_t dedup_off, 1407 int nradix, int flags); 1408 void hammer2_chain_unlock(hammer2_chain_t *chain); 1409 void hammer2_chain_unlock_hold(hammer2_chain_t *chain); 1410 void hammer2_chain_wait(hammer2_chain_t *chain); 1411 hammer2_chain_t *hammer2_chain_get(hammer2_chain_t *parent, int generation, 1412 hammer2_blockref_t *bref); 1413 hammer2_chain_t *hammer2_chain_lookup_init(hammer2_chain_t *parent, int flags); 1414 void hammer2_chain_lookup_done(hammer2_chain_t *parent); 1415 hammer2_chain_t *hammer2_chain_getparent(hammer2_chain_t **parentp, int how); 1416 hammer2_chain_t *hammer2_chain_lookup(hammer2_chain_t **parentp, 1417 hammer2_key_t *key_nextp, 1418 hammer2_key_t key_beg, hammer2_key_t key_end, 1419 int *cache_indexp, int flags); 1420 hammer2_chain_t *hammer2_chain_next(hammer2_chain_t **parentp, 1421 hammer2_chain_t *chain, 1422 hammer2_key_t *key_nextp, 1423 hammer2_key_t key_beg, hammer2_key_t key_end, 1424 int *cache_indexp, int flags); 1425 hammer2_blockref_t *hammer2_chain_scan(hammer2_chain_t *parent, 1426 hammer2_chain_t **chainp, 1427 hammer2_blockref_t *bref, 1428 int *firstp, int *cache_indexp, int flags); 1429 1430 int hammer2_chain_create(hammer2_chain_t **parentp, hammer2_chain_t **chainp, 1431 hammer2_pfs_t *pmp, int methods, 1432 hammer2_key_t key, int keybits, 1433 int type, size_t bytes, hammer2_tid_t mtid, 1434 hammer2_off_t dedup_off, int flags); 1435 void hammer2_chain_rename(hammer2_blockref_t *bref, 1436 hammer2_chain_t **parentp, 1437 hammer2_chain_t *chain, 1438 hammer2_tid_t mtid, int flags); 1439 void hammer2_chain_delete(hammer2_chain_t *parent, hammer2_chain_t *chain, 1440 hammer2_tid_t mtid, int flags); 1441 void hammer2_chain_setflush(hammer2_chain_t *chain); 1442 void hammer2_chain_countbrefs(hammer2_chain_t *chain, 1443 hammer2_blockref_t *base, int count); 1444 hammer2_chain_t *hammer2_chain_bulksnap(hammer2_chain_t *chain); 1445 void hammer2_chain_bulkdrop(hammer2_chain_t *copy); 1446 1447 void hammer2_chain_setcheck(hammer2_chain_t *chain, void *bdata); 1448 int hammer2_chain_testcheck(hammer2_chain_t *chain, void *bdata); 1449 1450 void hammer2_pfs_memory_wait(hammer2_pfs_t *pmp); 1451 void hammer2_pfs_memory_inc(hammer2_pfs_t *pmp); 1452 void hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp); 1453 1454 void hammer2_base_delete(hammer2_chain_t *chain, 1455 hammer2_blockref_t *base, int count, 1456 int *cache_indexp, hammer2_chain_t *child); 1457 void hammer2_base_insert(hammer2_chain_t *chain, 1458 hammer2_blockref_t *base, int count, 1459 int *cache_indexp, hammer2_chain_t *child); 1460 1461 /* 1462 * hammer2_flush.c 1463 */ 1464 void hammer2_flush(hammer2_chain_t *chain, int istop); 1465 void hammer2_flush_quick(hammer2_dev_t *hmp); 1466 void hammer2_delayed_flush(hammer2_chain_t *chain); 1467 1468 /* 1469 * hammer2_trans.c 1470 */ 1471 void hammer2_trans_init(hammer2_pfs_t *pmp, uint32_t flags); 1472 hammer2_tid_t hammer2_trans_sub(hammer2_pfs_t *pmp); 1473 void hammer2_trans_clear_preflush(hammer2_pfs_t *pmp); 1474 void hammer2_trans_done(hammer2_pfs_t *pmp); 1475 hammer2_tid_t hammer2_trans_newinum(hammer2_pfs_t *pmp); 1476 void hammer2_trans_assert_strategy(hammer2_pfs_t *pmp); 1477 void hammer2_dedup_record(hammer2_chain_t *chain, char *data); 1478 1479 /* 1480 * hammer2_ioctl.c 1481 */ 1482 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data, 1483 int fflag, struct ucred *cred); 1484 1485 /* 1486 * hammer2_io.c 1487 */ 1488 void hammer2_io_putblk(hammer2_io_t **diop); 1489 void hammer2_io_cleanup(hammer2_dev_t *hmp, struct hammer2_io_tree *tree); 1490 char *hammer2_io_data(hammer2_io_t *dio, off_t lbase); 1491 hammer2_io_t *hammer2_io_getquick(hammer2_dev_t *hmp, off_t lbase, int lsize); 1492 void hammer2_io_resetinval(hammer2_dev_t *hmp, off_t lbase); 1493 void hammer2_io_getblk(hammer2_dev_t *hmp, off_t lbase, int lsize, 1494 hammer2_iocb_t *iocb); 1495 void hammer2_io_complete(hammer2_iocb_t *iocb); 1496 void hammer2_io_callback(struct bio *bio); 1497 void hammer2_iocb_wait(hammer2_iocb_t *iocb); 1498 int hammer2_io_new(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize, 1499 hammer2_io_t **diop); 1500 int hammer2_io_newnz(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize, 1501 hammer2_io_t **diop); 1502 void hammer2_io_newq(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize); 1503 int hammer2_io_bread(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize, 1504 hammer2_io_t **diop); 1505 void hammer2_io_bawrite(hammer2_io_t **diop); 1506 void hammer2_io_bdwrite(hammer2_io_t **diop); 1507 int hammer2_io_bwrite(hammer2_io_t **diop); 1508 int hammer2_io_isdirty(hammer2_io_t *dio); 1509 void hammer2_io_setdirty(hammer2_io_t *dio); 1510 void hammer2_io_setinval(hammer2_io_t *dio, hammer2_off_t off, u_int bytes); 1511 void hammer2_io_brelse(hammer2_io_t **diop); 1512 void hammer2_io_bqrelse(hammer2_io_t **diop); 1513 int hammer2_io_crc_good(hammer2_chain_t *chain, uint64_t *maskp); 1514 void hammer2_io_crc_setmask(hammer2_io_t *dio, uint64_t mask); 1515 void hammer2_io_crc_clrmask(hammer2_io_t *dio, uint64_t mask); 1516 1517 /* 1518 * hammer2_thread.c 1519 */ 1520 void hammer2_thr_signal(hammer2_thread_t *thr, uint32_t flags); 1521 void hammer2_thr_return(hammer2_thread_t *thr, uint32_t flags); 1522 void hammer2_thr_wait(hammer2_thread_t *thr, uint32_t flags); 1523 void hammer2_thr_wait_neg(hammer2_thread_t *thr, uint32_t flags); 1524 void hammer2_thr_create(hammer2_thread_t *thr, hammer2_pfs_t *pmp, 1525 const char *id, int clindex, int repidx, 1526 void (*func)(void *arg)); 1527 void hammer2_thr_delete(hammer2_thread_t *thr); 1528 void hammer2_thr_remaster(hammer2_thread_t *thr); 1529 void hammer2_thr_freeze_async(hammer2_thread_t *thr); 1530 void hammer2_thr_freeze(hammer2_thread_t *thr); 1531 void hammer2_thr_unfreeze(hammer2_thread_t *thr); 1532 int hammer2_thr_break(hammer2_thread_t *thr); 1533 void hammer2_primary_xops_thread(void *arg); 1534 1535 /* 1536 * hammer2_thread.c (XOP API) 1537 */ 1538 void hammer2_xop_group_init(hammer2_pfs_t *pmp, hammer2_xop_group_t *xgrp); 1539 void *hammer2_xop_alloc(hammer2_inode_t *ip, int flags); 1540 void hammer2_xop_setname(hammer2_xop_head_t *xop, 1541 const char *name, size_t name_len); 1542 void hammer2_xop_setname2(hammer2_xop_head_t *xop, 1543 const char *name, size_t name_len); 1544 size_t hammer2_xop_setname_inum(hammer2_xop_head_t *xop, hammer2_key_t inum); 1545 void hammer2_xop_setip2(hammer2_xop_head_t *xop, hammer2_inode_t *ip2); 1546 void hammer2_xop_setip3(hammer2_xop_head_t *xop, hammer2_inode_t *ip3); 1547 void hammer2_xop_reinit(hammer2_xop_head_t *xop); 1548 void hammer2_xop_helper_create(hammer2_pfs_t *pmp); 1549 void hammer2_xop_helper_cleanup(hammer2_pfs_t *pmp); 1550 void hammer2_xop_start(hammer2_xop_head_t *xop, hammer2_xop_func_t func); 1551 void hammer2_xop_start_except(hammer2_xop_head_t *xop, hammer2_xop_func_t func, 1552 int notidx); 1553 int hammer2_xop_collect(hammer2_xop_head_t *xop, int flags); 1554 void hammer2_xop_retire(hammer2_xop_head_t *xop, uint32_t mask); 1555 int hammer2_xop_active(hammer2_xop_head_t *xop); 1556 int hammer2_xop_feed(hammer2_xop_head_t *xop, hammer2_chain_t *chain, 1557 int clindex, int error); 1558 1559 /* 1560 * hammer2_synchro.c 1561 */ 1562 void hammer2_primary_sync_thread(void *arg); 1563 1564 /* 1565 * XOP backends in hammer2_xops.c, primarily for VNOPS. Other XOP backends 1566 * may be integrated into other source files. 1567 */ 1568 void hammer2_xop_ipcluster(hammer2_xop_t *xop, int clidx); 1569 void hammer2_xop_readdir(hammer2_xop_t *xop, int clidx); 1570 void hammer2_xop_nresolve(hammer2_xop_t *xop, int clidx); 1571 void hammer2_xop_unlink(hammer2_xop_t *xop, int clidx); 1572 void hammer2_xop_nrename(hammer2_xop_t *xop, int clidx); 1573 void hammer2_xop_nlink(hammer2_xop_t *xop, int clidx); 1574 void hammer2_xop_scanlhc(hammer2_xop_t *xop, int clidx); 1575 void hammer2_xop_scanall(hammer2_xop_t *xop, int clidx); 1576 void hammer2_xop_lookup(hammer2_xop_t *xop, int clidx); 1577 void hammer2_inode_xop_create(hammer2_xop_t *xop, int clidx); 1578 void hammer2_inode_xop_destroy(hammer2_xop_t *xop, int clidx); 1579 void hammer2_inode_xop_chain_sync(hammer2_xop_t *xop, int clidx); 1580 void hammer2_inode_xop_unlinkall(hammer2_xop_t *xop, int clidx); 1581 void hammer2_inode_xop_connect(hammer2_xop_t *xop, int clidx); 1582 void hammer2_inode_xop_flush(hammer2_xop_t *xop, int clidx); 1583 1584 /* 1585 * hammer2_msgops.c 1586 */ 1587 int hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg); 1588 int hammer2_msg_adhoc_input(kdmsg_msg_t *msg); 1589 1590 /* 1591 * hammer2_vfsops.c 1592 */ 1593 void hammer2_volconf_update(hammer2_dev_t *hmp, int index); 1594 void hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp, char pfx); 1595 int hammer2_vfs_sync(struct mount *mp, int waitflags); 1596 hammer2_pfs_t *hammer2_pfsalloc(hammer2_chain_t *chain, 1597 const hammer2_inode_data_t *ripdata, 1598 hammer2_tid_t modify_tid, 1599 hammer2_dev_t *force_local); 1600 int hammer2_vfs_vget(struct mount *mp, struct vnode *dvp, 1601 ino_t ino, struct vnode **vpp); 1602 1603 void hammer2_lwinprog_ref(hammer2_pfs_t *pmp); 1604 void hammer2_lwinprog_drop(hammer2_pfs_t *pmp); 1605 void hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int pipe); 1606 1607 /* 1608 * hammer2_freemap.c 1609 */ 1610 int hammer2_freemap_alloc(hammer2_chain_t *chain, size_t bytes); 1611 void hammer2_freemap_adjust(hammer2_dev_t *hmp, 1612 hammer2_blockref_t *bref, int how); 1613 1614 /* 1615 * hammer2_cluster.c 1616 */ 1617 uint8_t hammer2_cluster_type(hammer2_cluster_t *cluster); 1618 const hammer2_media_data_t *hammer2_cluster_rdata(hammer2_cluster_t *cluster); 1619 hammer2_media_data_t *hammer2_cluster_wdata(hammer2_cluster_t *cluster); 1620 hammer2_cluster_t *hammer2_cluster_from_chain(hammer2_chain_t *chain); 1621 void hammer2_cluster_bref(hammer2_cluster_t *cluster, hammer2_blockref_t *bref); 1622 hammer2_cluster_t *hammer2_cluster_alloc(hammer2_pfs_t *pmp, 1623 hammer2_blockref_t *bref); 1624 void hammer2_cluster_ref(hammer2_cluster_t *cluster); 1625 void hammer2_cluster_drop(hammer2_cluster_t *cluster); 1626 void hammer2_cluster_lock(hammer2_cluster_t *cluster, int how); 1627 int hammer2_cluster_check(hammer2_cluster_t *cluster, hammer2_key_t lokey, 1628 int flags); 1629 void hammer2_cluster_resolve(hammer2_cluster_t *cluster); 1630 void hammer2_cluster_forcegood(hammer2_cluster_t *cluster); 1631 hammer2_cluster_t *hammer2_cluster_copy(hammer2_cluster_t *ocluster); 1632 void hammer2_cluster_unlock(hammer2_cluster_t *cluster); 1633 1634 int hammer2_bulkfree_pass(hammer2_dev_t *hmp, 1635 struct hammer2_ioc_bulkfree *bfi); 1636 1637 /* 1638 * hammer2_iocom.c 1639 */ 1640 void hammer2_iocom_init(hammer2_dev_t *hmp); 1641 void hammer2_iocom_uninit(hammer2_dev_t *hmp); 1642 void hammer2_cluster_reconnect(hammer2_dev_t *hmp, struct file *fp); 1643 1644 /* 1645 * hammer2_strategy.c 1646 */ 1647 int hammer2_vop_strategy(struct vop_strategy_args *ap); 1648 int hammer2_vop_bmap(struct vop_bmap_args *ap); 1649 void hammer2_write_thread(void *arg); 1650 void hammer2_bioq_sync(hammer2_pfs_t *pmp); 1651 void hammer2_dedup_clear(hammer2_dev_t *hmp); 1652 1653 #endif /* !_KERNEL */ 1654 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */ 1655