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 #ifdef _KERNEL 66 #include <sys/param.h> 67 #endif 68 #include <sys/types.h> 69 #ifdef _KERNEL 70 #include <sys/kernel.h> 71 #endif 72 #include <sys/conf.h> 73 #ifdef _KERNEL 74 #include <sys/systm.h> 75 #endif 76 #include <sys/tree.h> 77 #include <sys/malloc.h> 78 #include <sys/mount.h> 79 #include <sys/vnode.h> 80 #include <sys/proc.h> 81 #include <sys/mountctl.h> 82 #include <sys/priv.h> 83 #include <sys/stat.h> 84 #include <sys/thread.h> 85 #include <sys/globaldata.h> 86 #include <sys/lockf.h> 87 #include <sys/buf.h> 88 #include <sys/queue.h> 89 #include <sys/limits.h> 90 #include <sys/dmsg.h> 91 #include <sys/mutex.h> 92 #ifdef _KERNEL 93 #include <sys/kern_syscall.h> 94 #endif 95 96 #ifdef _KERNEL 97 #include <sys/signal2.h> 98 #include <sys/buf2.h> 99 #include <sys/mutex2.h> 100 #include <sys/thread2.h> 101 #endif 102 103 #include "hammer2_xxhash.h" 104 #include "hammer2_disk.h" 105 #include "hammer2_mount.h" 106 #include "hammer2_ioctl.h" 107 108 struct hammer2_io; 109 struct hammer2_iocb; 110 struct hammer2_chain; 111 struct hammer2_cluster; 112 struct hammer2_inode; 113 struct hammer2_dev; 114 struct hammer2_pfs; 115 struct hammer2_span; 116 struct hammer2_state; 117 struct hammer2_msg; 118 struct hammer2_thread; 119 union hammer2_xop; 120 121 /* 122 * Mutex and lock shims. Hammer2 requires support for asynchronous and 123 * abortable locks, and both exclusive and shared spinlocks. Normal 124 * synchronous non-abortable locks can be substituted for spinlocks. 125 */ 126 typedef mtx_t hammer2_mtx_t; 127 typedef mtx_link_t hammer2_mtx_link_t; 128 typedef mtx_state_t hammer2_mtx_state_t; 129 130 typedef struct spinlock hammer2_spin_t; 131 132 #define hammer2_mtx_ex mtx_lock_ex_quick 133 #define hammer2_mtx_sh mtx_lock_sh_quick 134 #define hammer2_mtx_sh_again mtx_lock_sh_again 135 #define hammer2_mtx_unlock mtx_unlock 136 #define hammer2_mtx_downgrade mtx_downgrade 137 #define hammer2_mtx_owned mtx_owned 138 #define hammer2_mtx_init mtx_init 139 #define hammer2_mtx_temp_release mtx_lock_temp_release 140 #define hammer2_mtx_temp_restore mtx_lock_temp_restore 141 #define hammer2_mtx_refs mtx_lockrefs 142 143 #define hammer2_spin_init spin_init 144 #define hammer2_spin_sh spin_lock_shared 145 #define hammer2_spin_ex spin_lock 146 #define hammer2_spin_unsh spin_unlock_shared 147 #define hammer2_spin_unex spin_unlock 148 149 TAILQ_HEAD(hammer2_xop_list, hammer2_xop_head); 150 TAILQ_HEAD(hammer2_chain_list, hammer2_chain); 151 152 typedef struct hammer2_xop_list hammer2_xop_list_t; 153 154 #ifdef _KERNEL 155 /* 156 * General lock support 157 */ 158 static __inline 159 int 160 hammer2_mtx_upgrade_try(hammer2_mtx_t *mtx) 161 { 162 return mtx_upgrade_try(mtx); 163 } 164 165 #endif 166 167 /* 168 * The xid tracks internal transactional updates. 169 * 170 * XXX fix-me, really needs to be 64-bits 171 */ 172 typedef uint32_t hammer2_xid_t; 173 174 #define HAMMER2_XID_MIN 0x00000000U 175 #define HAMMER2_XID_MAX 0x7FFFFFFFU 176 177 #define HAMMER2_LIMIT_DIRTY_CHAINS (65536) 178 179 /* 180 * The chain structure tracks a portion of the media topology from the 181 * root (volume) down. Chains represent volumes, inodes, indirect blocks, 182 * data blocks, and freemap nodes and leafs. 183 * 184 * The chain structure utilizes a simple singly-homed topology and the 185 * chain's in-memory topology will move around as the chains do, due mainly 186 * to renames and indirect block creation. 187 * 188 * Block Table Updates 189 * 190 * Block table updates for insertions and updates are delayed until the 191 * flush. This allows us to avoid having to modify the parent chain 192 * all the way to the root. 193 * 194 * Block table deletions are performed immediately (modifying the parent 195 * in the process) because the flush code uses the chain structure to 196 * track delayed updates and the chain will be (likely) gone or moved to 197 * another location in the topology after a deletion. 198 * 199 * A prior iteration of the code tried to keep the relationship intact 200 * on deletes by doing a delete-duplicate operation on the chain, but 201 * it added way too much complexity to the codebase. 202 * 203 * Flush Synchronization 204 * 205 * The flush code must flush modified chains bottom-up. Because chain 206 * structures can shift around and are NOT topologically stable, 207 * modified chains are independently indexed for the flush. As the flush 208 * runs it modifies (or further modifies) and updates the parents, 209 * propagating the flush all the way to the volume root. 210 * 211 * Modifying front-end operations can occur during a flush but will block 212 * in two cases: (1) when the front-end tries to operate on the inode 213 * currently in the midst of being flushed and (2) if the front-end 214 * crosses an inode currently being flushed (such as during a rename). 215 * So, for example, if you rename directory "x" to "a/b/c/d/e/f/g/x" and 216 * the flusher is currently working on "a/b/c", the rename will block 217 * temporarily in order to ensure that "x" exists in one place or the 218 * other. 219 * 220 * Meta-data statistics are updated by the flusher. The front-end will 221 * make estimates but meta-data must be fully synchronized only during a 222 * flush in order to ensure that it remains correct across a crash. 223 * 224 * Multiple flush synchronizations can theoretically be in-flight at the 225 * same time but the implementation is not coded to handle the case and 226 * currently serializes them. 227 * 228 * Snapshots: 229 * 230 * Snapshots currently require the subdirectory tree being snapshotted 231 * to be flushed. The snapshot then creates a new super-root inode which 232 * copies the flushed blockdata of the directory or file that was 233 * snapshotted. 234 * 235 * RBTREE NOTES: 236 * 237 * - Note that the radix tree runs in powers of 2 only so sub-trees 238 * cannot straddle edges. 239 */ 240 RB_HEAD(hammer2_chain_tree, hammer2_chain); 241 TAILQ_HEAD(h2_flush_list, hammer2_chain); 242 TAILQ_HEAD(h2_core_list, hammer2_chain); 243 TAILQ_HEAD(h2_iocb_list, hammer2_iocb); 244 245 #define CHAIN_CORE_DELETE_BMAP_ENTRIES \ 246 (HAMMER2_PBUFSIZE / sizeof(hammer2_blockref_t) / sizeof(uint32_t)) 247 248 /* 249 * Core topology for chain (embedded in chain). Protected by a spinlock. 250 */ 251 struct hammer2_chain_core { 252 hammer2_spin_t spin; 253 struct hammer2_chain_tree rbtree; /* sub-chains */ 254 int live_zero; /* blockref array opt */ 255 u_int live_count; /* live (not deleted) chains in tree */ 256 u_int chain_count; /* live + deleted chains under core */ 257 int generation; /* generation number (inserts only) */ 258 }; 259 260 typedef struct hammer2_chain_core hammer2_chain_core_t; 261 262 RB_HEAD(hammer2_io_tree, hammer2_io); 263 264 /* 265 * IOCB - IO callback (into chain, cluster, or manual request) 266 */ 267 struct hammer2_iocb { 268 TAILQ_ENTRY(hammer2_iocb) entry; 269 void (*callback)(struct hammer2_iocb *iocb); 270 struct hammer2_io *dio; 271 struct hammer2_chain *chain; 272 void *ptr; 273 off_t lbase; 274 int lsize; 275 uint32_t flags; 276 int error; 277 int btype; 278 }; 279 280 typedef struct hammer2_iocb hammer2_iocb_t; 281 282 #define HAMMER2_IOCB_INTERLOCK 0x00000001 283 #define HAMMER2_IOCB_ONQ 0x00000002 284 #define HAMMER2_IOCB_DONE 0x00000004 285 #define HAMMER2_IOCB_INPROG 0x00000008 286 #define HAMMER2_IOCB_UNUSED10 0x00000010 287 #define HAMMER2_IOCB_QUICK 0x00010000 288 #define HAMMER2_IOCB_ZERO 0x00020000 289 #define HAMMER2_IOCB_READ 0x00040000 290 #define HAMMER2_IOCB_WAKEUP 0x00080000 291 292 /* 293 * DIO - Management structure wrapping system buffer cache. 294 * 295 * Used for multiple purposes including concurrent management 296 * if small requests by chains into larger DIOs. 297 */ 298 struct hammer2_io { 299 RB_ENTRY(hammer2_io) rbnode; /* indexed by device offset */ 300 struct h2_iocb_list iocbq; 301 struct spinlock spin; 302 struct hammer2_dev *hmp; 303 struct buf *bp; 304 off_t pbase; 305 uint64_t refs; 306 int psize; 307 int act; /* activity */ 308 int btype; /* approximate BREF_TYPE_* */ 309 int unused01; 310 }; 311 312 typedef struct hammer2_io hammer2_io_t; 313 314 #define HAMMER2_DIO_INPROG 0x8000000000000000LLU /* bio in progress */ 315 #define HAMMER2_DIO_GOOD 0x4000000000000000LLU /* dio->bp is stable */ 316 #define HAMMER2_DIO_WAITING 0x2000000000000000LLU /* wait on INPROG */ 317 #define HAMMER2_DIO_DIRTY 0x1000000000000000LLU /* flush last drop */ 318 #define HAMMER2_DIO_INVALOK 0x0800000000000000LLU /* ok to inval */ 319 #define HAMMER2_DIO_INVAL 0x0400000000000000LLU /* inval request */ 320 321 #define HAMMER2_DIO_MASK 0x00FFFFFFFFFFFFFFLLU 322 323 #define HAMMER2_DIO_INVALBITS (HAMMER2_DIO_INVAL | HAMMER2_DIO_INVALOK) 324 325 /* 326 * Primary chain structure keeps track of the topology in-memory. 327 */ 328 struct hammer2_chain { 329 hammer2_mtx_t lock; 330 hammer2_chain_core_t core; 331 RB_ENTRY(hammer2_chain) rbnode; /* live chain(s) */ 332 hammer2_blockref_t bref; 333 struct hammer2_chain *parent; 334 struct hammer2_state *state; /* if active cache msg */ 335 struct hammer2_dev *hmp; 336 struct hammer2_pfs *pmp; /* A PFS or super-root (spmp) */ 337 338 hammer2_io_t *dio; /* physical data buffer */ 339 u_int bytes; /* physical data size */ 340 u_int flags; 341 u_int refs; 342 u_int lockcnt; 343 int error; /* on-lock data error state */ 344 int persist_refs; /* (aka ip->cluster) */ 345 346 hammer2_media_data_t *data; /* data pointer shortcut */ 347 TAILQ_ENTRY(hammer2_chain) flush_node; /* flush list */ 348 TAILQ_ENTRY(hammer2_chain) lru_node; /* 0-refs LRU */ 349 }; 350 351 typedef struct hammer2_chain hammer2_chain_t; 352 353 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2); 354 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp); 355 356 /* 357 * Special notes on flags: 358 * 359 * INITIAL - This flag allows a chain to be created and for storage to 360 * be allocated without having to immediately instantiate the 361 * related buffer. The data is assumed to be all-zeros. It 362 * is primarily used for indirect blocks. 363 * 364 * MODIFIED - The chain's media data has been modified. Prevents chain 365 * free on lastdrop if still in the topology. 366 * 367 * UPDATE - Chain might not be modified but parent blocktable needs 368 * an update. Prevents chain free on lastdrop if still in 369 * the topology. 370 * 371 * FICTITIOUS - Faked chain as a placeholder for an error condition. This 372 * chain is unsuitable for I/O. 373 * 374 * BMAPPED - Indicates that the chain is present in the parent blockmap. 375 * 376 * BMAPUPD - Indicates that the chain is present but needs to be updated 377 * in the parent blockmap. 378 */ 379 #define HAMMER2_CHAIN_MODIFIED 0x00000001 /* dirty chain data */ 380 #define HAMMER2_CHAIN_ALLOCATED 0x00000002 /* kmalloc'd chain */ 381 #define HAMMER2_CHAIN_DESTROY 0x00000004 382 #define HAMMER2_CHAIN_DEDUP 0x00000008 /* recorded for dedup */ 383 #define HAMMER2_CHAIN_DELETED 0x00000010 /* deleted chain */ 384 #define HAMMER2_CHAIN_INITIAL 0x00000020 /* initial create */ 385 #define HAMMER2_CHAIN_UPDATE 0x00000040 /* need parent update */ 386 #define HAMMER2_CHAIN_DEFERRED 0x00000080 /* flush depth defer */ 387 #define HAMMER2_CHAIN_TESTEDGOOD 0x00000100 /* crc tested good */ 388 #define HAMMER2_CHAIN_ONFLUSH 0x00000200 /* on a flush list */ 389 #define HAMMER2_CHAIN_FICTITIOUS 0x00000400 /* unsuitable for I/O */ 390 #define HAMMER2_CHAIN_VOLUMESYNC 0x00000800 /* needs volume sync */ 391 #define HAMMER2_CHAIN_DELAYED 0x00001000 /* delayed flush */ 392 #define HAMMER2_CHAIN_COUNTEDBREFS 0x00002000 /* block table stats */ 393 #define HAMMER2_CHAIN_ONRBTREE 0x00004000 /* on parent RB tree */ 394 #define HAMMER2_CHAIN_ONLRU 0x00008000 /* on LRU list */ 395 #define HAMMER2_CHAIN_EMBEDDED 0x00010000 /* embedded data */ 396 #define HAMMER2_CHAIN_RELEASE 0x00020000 /* don't keep around */ 397 #define HAMMER2_CHAIN_BMAPPED 0x00040000 /* present in blkmap */ 398 #define HAMMER2_CHAIN_BMAPUPD 0x00080000 /* +needs updating */ 399 #define HAMMER2_CHAIN_IOINPROG 0x00100000 /* I/O interlock */ 400 #define HAMMER2_CHAIN_IOSIGNAL 0x00200000 /* I/O interlock */ 401 #define HAMMER2_CHAIN_PFSBOUNDARY 0x00400000 /* super->pfs inode */ 402 403 #define HAMMER2_CHAIN_FLUSH_MASK (HAMMER2_CHAIN_MODIFIED | \ 404 HAMMER2_CHAIN_UPDATE | \ 405 HAMMER2_CHAIN_ONFLUSH | \ 406 HAMMER2_CHAIN_DESTROY) 407 408 /* 409 * Hammer2 error codes, used by chain->error and cluster->error. The error 410 * code is typically set on-lock unless no I/O was requested, and set on 411 * I/O otherwise. If set for a cluster it generally means that the cluster 412 * code could not find a valid copy to present. 413 * 414 * IO - An I/O error occurred 415 * CHECK - I/O succeeded but did not match the check code 416 * INCOMPLETE - A cluster is not complete enough to use, or 417 * a chain cannot be loaded because its parent has an error. 418 * 419 * NOTE: API allows callers to check zero/non-zero to determine if an error 420 * condition exists. 421 * 422 * NOTE: Chain's data field is usually NULL on an IO error but not necessarily 423 * NULL on other errors. Check chain->error, not chain->data. 424 */ 425 #define HAMMER2_ERROR_NONE 0 426 #define HAMMER2_ERROR_IO 1 /* device I/O error */ 427 #define HAMMER2_ERROR_CHECK 2 /* check code mismatch */ 428 #define HAMMER2_ERROR_INCOMPLETE 3 /* incomplete cluster */ 429 #define HAMMER2_ERROR_DEPTH 4 /* temporary depth limit */ 430 431 /* 432 * Flags passed to hammer2_chain_lookup() and hammer2_chain_next() 433 * 434 * NOTES: 435 * NOLOCK - Input and output chains are referenced only and not 436 * locked. Output chain might be temporarily locked 437 * internally. 438 * 439 * NODATA - Asks that the chain->data not be resolved in order 440 * to avoid I/O. 441 * 442 * NODIRECT - Prevents a lookup of offset 0 in an inode from returning 443 * the inode itself if the inode is in DIRECTDATA mode 444 * (i.e. file is <= 512 bytes). Used by the synchronization 445 * code to prevent confusion. 446 * 447 * SHARED - The input chain is expected to be locked shared, 448 * and the output chain is locked shared. 449 * 450 * MATCHIND - Allows an indirect block / freemap node to be returned 451 * when the passed key range matches the radix. Remember 452 * that key_end is inclusive (e.g. {0x000,0xFFF}, 453 * not {0x000,0x1000}). 454 * 455 * (Cannot be used for remote or cluster ops). 456 * 457 * ALLNODES - Allows NULL focus. 458 * 459 * ALWAYS - Always resolve the data. If ALWAYS and NODATA are both 460 * missing, bulk file data is not resolved but inodes and 461 * other meta-data will. 462 * 463 * NOUNLOCK - Used by hammer2_chain_next() to leave the lock on 464 * the input chain intact. The chain is still dropped. 465 * This allows the caller to add a reference to the chain 466 * and retain it in a locked state (used by the 467 * XOP/feed/collect code). 468 */ 469 #define HAMMER2_LOOKUP_NOLOCK 0x00000001 /* ref only */ 470 #define HAMMER2_LOOKUP_NODATA 0x00000002 /* data left NULL */ 471 #define HAMMER2_LOOKUP_NODIRECT 0x00000004 /* no offset=0 DD */ 472 #define HAMMER2_LOOKUP_SHARED 0x00000100 473 #define HAMMER2_LOOKUP_MATCHIND 0x00000200 /* return all chains */ 474 #define HAMMER2_LOOKUP_ALLNODES 0x00000400 /* allow NULL focus */ 475 #define HAMMER2_LOOKUP_ALWAYS 0x00000800 /* resolve data */ 476 #define HAMMER2_LOOKUP_NOUNLOCK 0x00001000 /* leave lock intact */ 477 478 /* 479 * Flags passed to hammer2_chain_modify() and hammer2_chain_resize() 480 * 481 * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT 482 * blocks in the INITIAL-create state. 483 */ 484 #define HAMMER2_MODIFY_OPTDATA 0x00000002 /* data can be NULL */ 485 #define HAMMER2_MODIFY_NO_MODIFY_TID 0x00000004 486 #define HAMMER2_MODIFY_UNUSED0008 0x00000008 487 488 /* 489 * Flags passed to hammer2_chain_lock() 490 * 491 * NOTE: RDONLY is set to optimize cluster operations when *no* modifications 492 * will be made to either the cluster being locked or any underlying 493 * cluster. It allows the cluster to lock and access data for a subset 494 * of available nodes instead of all available nodes. 495 */ 496 #define HAMMER2_RESOLVE_NEVER 1 497 #define HAMMER2_RESOLVE_MAYBE 2 498 #define HAMMER2_RESOLVE_ALWAYS 3 499 #define HAMMER2_RESOLVE_MASK 0x0F 500 501 #define HAMMER2_RESOLVE_SHARED 0x10 /* request shared lock */ 502 #define HAMMER2_RESOLVE_LOCKAGAIN 0x20 /* another shared lock */ 503 #define HAMMER2_RESOLVE_RDONLY 0x40 /* higher level op flag */ 504 505 /* 506 * Flags passed to hammer2_chain_delete() 507 */ 508 #define HAMMER2_DELETE_PERMANENT 0x0001 509 510 /* 511 * Flags passed to hammer2_chain_insert() or hammer2_chain_rename() 512 */ 513 #define HAMMER2_INSERT_PFSROOT 0x0004 514 515 /* 516 * Flags passed to hammer2_chain_delete_duplicate() 517 */ 518 #define HAMMER2_DELDUP_RECORE 0x0001 519 520 /* 521 * Cluster different types of storage together for allocations 522 */ 523 #define HAMMER2_FREECACHE_INODE 0 524 #define HAMMER2_FREECACHE_INDIR 1 525 #define HAMMER2_FREECACHE_DATA 2 526 #define HAMMER2_FREECACHE_UNUSED3 3 527 #define HAMMER2_FREECACHE_TYPES 4 528 529 /* 530 * hammer2_freemap_alloc() block preference 531 */ 532 #define HAMMER2_OFF_NOPREF ((hammer2_off_t)-1) 533 534 /* 535 * BMAP read-ahead maximum parameters 536 */ 537 #define HAMMER2_BMAP_COUNT 16 /* max bmap read-ahead */ 538 #define HAMMER2_BMAP_BYTES (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT) 539 540 /* 541 * hammer2_freemap_adjust() 542 */ 543 #define HAMMER2_FREEMAP_DORECOVER 1 544 #define HAMMER2_FREEMAP_DOMAYFREE 2 545 #define HAMMER2_FREEMAP_DOREALFREE 3 546 547 /* 548 * HAMMER2 cluster - A set of chains representing the same entity. 549 * 550 * hammer2_cluster typically represents a temporary set of representitive 551 * chains. The one exception is that a hammer2_cluster is embedded in 552 * hammer2_inode. This embedded cluster is ONLY used to track the 553 * representitive chains and cannot be directly locked. 554 * 555 * A cluster is usually temporary (and thus per-thread) for locking purposes, 556 * allowing us to embed the asynchronous storage required for cluster 557 * operations in the cluster itself and adjust the state and status without 558 * having to worry too much about SMP issues. 559 * 560 * The exception is the cluster embedded in the hammer2_inode structure. 561 * This is used to cache the cluster state on an inode-by-inode basis. 562 * Individual hammer2_chain structures not incorporated into clusters might 563 * also stick around to cache miscellanious elements. 564 * 565 * Because the cluster is a 'working copy' and is usually subject to cluster 566 * quorum rules, it is quite possible for us to end up with an insufficient 567 * number of live chains to execute an operation. If an insufficient number 568 * of chains remain in a working copy, the operation may have to be 569 * downgraded, retried, stall until the requisit number of chains are 570 * available, or possibly even error out depending on the mount type. 571 * 572 * A cluster's focus is set when it is locked. The focus can only be set 573 * to a chain still part of the synchronized set. 574 */ 575 #define HAMMER2_MAXCLUSTER 8 576 #define HAMMER2_XOPMASK_CLUSTER ((1U << HAMMER2_MAXCLUSTER) - 1) 577 #define HAMMER2_XOPFIFO 16 578 #define HAMMER2_XOPFIFO_MASK (HAMMER2_XOPFIFO - 1) 579 #define HAMMER2_XOPGROUPS 32 580 #define HAMMER2_XOPGROUPS_MASK (HAMMER2_XOPGROUPS - 1) 581 #define HAMMER2_XOPMASK_VOP 0x80000000U 582 #define HAMMER2_XOPMASK_FIFOW 0x40000000U 583 584 #define HAMMER2_XOPMASK_ALLDONE (HAMMER2_XOPMASK_VOP | HAMMER2_XOPMASK_CLUSTER) 585 586 #define HAMMER2_SPECTHREADS 1 /* sync */ 587 588 struct hammer2_cluster_item { 589 hammer2_chain_t *chain; 590 int cache_index; 591 int error; 592 uint32_t flags; 593 }; 594 595 typedef struct hammer2_cluster_item hammer2_cluster_item_t; 596 597 /* 598 * INVALID - Invalid for focus, i.e. not part of synchronized set. 599 * Once set, this bit is sticky across operations. 600 * 601 * FEMOD - Indicates that front-end modifying operations can 602 * mess with this entry and MODSYNC will copy also 603 * effect it. 604 */ 605 #define HAMMER2_CITEM_INVALID 0x00000001 606 #define HAMMER2_CITEM_FEMOD 0x00000002 607 #define HAMMER2_CITEM_NULL 0x00000004 608 609 struct hammer2_cluster { 610 int refs; /* track for deallocation */ 611 int ddflag; 612 struct hammer2_pfs *pmp; 613 uint32_t flags; 614 int nchains; 615 int error; /* error code valid on lock */ 616 int focus_index; 617 hammer2_iocb_t iocb; 618 hammer2_chain_t *focus; /* current focus (or mod) */ 619 hammer2_cluster_item_t array[HAMMER2_MAXCLUSTER]; 620 }; 621 622 typedef struct hammer2_cluster hammer2_cluster_t; 623 624 /* 625 * WRHARD - Hard mounts can write fully synchronized 626 * RDHARD - Hard mounts can read fully synchronized 627 * UNHARD - Unsynchronized masters present 628 * NOHARD - No masters visible 629 * WRSOFT - Soft mounts can write to at least the SOFT_MASTER 630 * RDSOFT - Soft mounts can read from at least a SOFT_SLAVE 631 * UNSOFT - Unsynchronized slaves present 632 * NOSOFT - No slaves visible 633 * RDSLAVE - slaves are accessible (possibly unsynchronized or remote). 634 * MSYNCED - All masters are fully synchronized 635 * SSYNCED - All known local slaves are fully synchronized to masters 636 * 637 * All available masters are always incorporated. All PFSs belonging to a 638 * cluster (master, slave, copy, whatever) always try to synchronize the 639 * total number of known masters in the PFSs root inode. 640 * 641 * A cluster might have access to many slaves, copies, or caches, but we 642 * have a limited number of cluster slots. Any such elements which are 643 * directly mounted from block device(s) will always be incorporated. Note 644 * that SSYNCED only applies to such elements which are directly mounted, 645 * not to any remote slaves, copies, or caches that could be available. These 646 * bits are used to monitor and drive our synchronization threads. 647 * 648 * When asking the question 'is any data accessible at all', then a simple 649 * test against (RDHARD|RDSOFT|RDSLAVE) gives you the answer. If any of 650 * these bits are set the object can be read with certain caveats: 651 * RDHARD - no caveats. RDSOFT - authoritative but might not be synchronized. 652 * and RDSLAVE - not authoritative, has some data but it could be old or 653 * incomplete. 654 * 655 * When both soft and hard mounts are available, data will be read and written 656 * via the soft mount only. But all might be in the cluster because 657 * background synchronization threads still need to do their work. 658 */ 659 #define HAMMER2_CLUSTER_INODE 0x00000001 /* embedded in inode struct */ 660 #define HAMMER2_CLUSTER_UNUSED2 0x00000002 661 #define HAMMER2_CLUSTER_LOCKED 0x00000004 /* cluster lks not recursive */ 662 #define HAMMER2_CLUSTER_WRHARD 0x00000100 /* hard-mount can write */ 663 #define HAMMER2_CLUSTER_RDHARD 0x00000200 /* hard-mount can read */ 664 #define HAMMER2_CLUSTER_UNHARD 0x00000400 /* unsynchronized masters */ 665 #define HAMMER2_CLUSTER_NOHARD 0x00000800 /* no masters visible */ 666 #define HAMMER2_CLUSTER_WRSOFT 0x00001000 /* soft-mount can write */ 667 #define HAMMER2_CLUSTER_RDSOFT 0x00002000 /* soft-mount can read */ 668 #define HAMMER2_CLUSTER_UNSOFT 0x00004000 /* unsynchronized slaves */ 669 #define HAMMER2_CLUSTER_NOSOFT 0x00008000 /* no slaves visible */ 670 #define HAMMER2_CLUSTER_MSYNCED 0x00010000 /* all masters synchronized */ 671 #define HAMMER2_CLUSTER_SSYNCED 0x00020000 /* known slaves synchronized */ 672 673 #define HAMMER2_CLUSTER_ANYDATA ( HAMMER2_CLUSTER_RDHARD | \ 674 HAMMER2_CLUSTER_RDSOFT | \ 675 HAMMER2_CLUSTER_RDSLAVE) 676 677 #define HAMMER2_CLUSTER_RDOK ( HAMMER2_CLUSTER_RDHARD | \ 678 HAMMER2_CLUSTER_RDSOFT) 679 680 #define HAMMER2_CLUSTER_WROK ( HAMMER2_CLUSTER_WRHARD | \ 681 HAMMER2_CLUSTER_WRSOFT) 682 683 #define HAMMER2_CLUSTER_ZFLAGS ( HAMMER2_CLUSTER_WRHARD | \ 684 HAMMER2_CLUSTER_RDHARD | \ 685 HAMMER2_CLUSTER_WRSOFT | \ 686 HAMMER2_CLUSTER_RDSOFT | \ 687 HAMMER2_CLUSTER_MSYNCED | \ 688 HAMMER2_CLUSTER_SSYNCED) 689 690 /* 691 * Helper functions (cluster must be locked for flags to be valid). 692 */ 693 static __inline 694 int 695 hammer2_cluster_rdok(hammer2_cluster_t *cluster) 696 { 697 return (cluster->flags & HAMMER2_CLUSTER_RDOK); 698 } 699 700 static __inline 701 int 702 hammer2_cluster_wrok(hammer2_cluster_t *cluster) 703 { 704 return (cluster->flags & HAMMER2_CLUSTER_WROK); 705 } 706 707 RB_HEAD(hammer2_inode_tree, hammer2_inode); 708 709 /* 710 * A hammer2 inode. 711 * 712 * NOTE: The inode-embedded cluster is never used directly for I/O (since 713 * it may be shared). Instead it will be replicated-in and synchronized 714 * back out if changed. 715 */ 716 struct hammer2_inode { 717 RB_ENTRY(hammer2_inode) rbnode; /* inumber lookup (HL) */ 718 hammer2_mtx_t lock; /* inode lock */ 719 hammer2_mtx_t truncate_lock; /* prevent truncates */ 720 struct hammer2_pfs *pmp; /* PFS mount */ 721 struct vnode *vp; 722 struct spinlock cluster_spin; /* update cluster */ 723 hammer2_cluster_t cluster; 724 struct lockf advlock; 725 u_int flags; 726 u_int refs; /* +vpref, +flushref */ 727 uint8_t comp_heuristic; 728 hammer2_inode_meta_t meta; /* copy of meta-data */ 729 hammer2_off_t osize; 730 }; 731 732 typedef struct hammer2_inode hammer2_inode_t; 733 734 /* 735 * MODIFIED - Inode is in a modified state, ip->meta may have changes. 736 * RESIZED - Inode truncated (any) or inode extended beyond 737 * EMBEDDED_BYTES. 738 */ 739 #define HAMMER2_INODE_MODIFIED 0x0001 740 #define HAMMER2_INODE_SROOT 0x0002 /* kmalloc special case */ 741 #define HAMMER2_INODE_RENAME_INPROG 0x0004 742 #define HAMMER2_INODE_ONRBTREE 0x0008 743 #define HAMMER2_INODE_RESIZED 0x0010 /* requires inode_fsync */ 744 #define HAMMER2_INODE_ISDELETED 0x0020 /* deleted */ 745 #define HAMMER2_INODE_ISUNLINKED 0x0040 746 #define HAMMER2_INODE_METAGOOD 0x0080 /* inode meta-data good */ 747 #define HAMMER2_INODE_ONSIDEQ 0x0100 /* on side processing queue */ 748 749 int hammer2_inode_cmp(hammer2_inode_t *ip1, hammer2_inode_t *ip2); 750 RB_PROTOTYPE2(hammer2_inode_tree, hammer2_inode, rbnode, hammer2_inode_cmp, 751 hammer2_tid_t); 752 753 /* 754 * inode-unlink side-structure 755 */ 756 struct hammer2_inode_sideq { 757 TAILQ_ENTRY(hammer2_inode_sideq) entry; 758 hammer2_inode_t *ip; 759 }; 760 TAILQ_HEAD(h2_sideq_list, hammer2_inode_sideq); 761 762 typedef struct hammer2_inode_sideq hammer2_inode_sideq_t; 763 764 /* 765 * Transaction management sub-structure under hammer2_pfs 766 */ 767 struct hammer2_trans { 768 uint32_t flags; 769 uint32_t sync_wait; 770 }; 771 772 typedef struct hammer2_trans hammer2_trans_t; 773 774 #define HAMMER2_TRANS_ISFLUSH 0x80000000 /* flush code */ 775 #define HAMMER2_TRANS_BUFCACHE 0x40000000 /* bio strategy */ 776 #define HAMMER2_TRANS_UNUSED20 0x20000000 777 #define HAMMER2_TRANS_FPENDING 0x10000000 /* flush pending */ 778 #define HAMMER2_TRANS_WAITING 0x08000000 /* someone waiting */ 779 #define HAMMER2_TRANS_MASK 0x00FFFFFF /* count mask */ 780 781 #define HAMMER2_FREEMAP_HEUR_NRADIX 4 /* pwr 2 PBUFRADIX-MINIORADIX */ 782 #define HAMMER2_FREEMAP_HEUR_TYPES 8 783 #define HAMMER2_FREEMAP_HEUR_SIZE (HAMMER2_FREEMAP_HEUR_NRADIX * \ 784 HAMMER2_FREEMAP_HEUR_TYPES) 785 786 #define HAMMER2_DEDUP_HEUR_SIZE 65536 787 #define HAMMER2_DEDUP_HEUR_MASK (HAMMER2_DEDUP_HEUR_SIZE - 1) 788 789 #define HAMMER2_FLUSH_TOP 0x0001 790 #define HAMMER2_FLUSH_ALL 0x0002 791 792 793 /* 794 * Hammer2 support thread element. 795 * 796 * Potentially many support threads can hang off of hammer2, primarily 797 * off the hammer2_pfs structure. Typically: 798 * 799 * td x Nodes A synchronization thread for each node. 800 * td x Nodes x workers Worker threads for frontend operations. 801 * td x 1 Bioq thread for logical buffer writes. 802 * 803 * In addition, the synchronization thread(s) associated with the 804 * super-root PFS (spmp) for a node is responsible for automatic bulkfree 805 * and dedup scans. 806 */ 807 struct hammer2_thread { 808 struct hammer2_pfs *pmp; 809 struct hammer2_dev *hmp; 810 hammer2_xop_list_t xopq; 811 thread_t td; 812 uint32_t flags; 813 int depth; 814 int clindex; /* cluster element index */ 815 int repidx; 816 char *scratch; /* MAXPHYS */ 817 }; 818 819 typedef struct hammer2_thread hammer2_thread_t; 820 821 #define HAMMER2_THREAD_UNMOUNTING 0x0001 /* unmount request */ 822 #define HAMMER2_THREAD_DEV 0x0002 /* related to dev, not pfs */ 823 #define HAMMER2_THREAD_WAITING 0x0004 /* thread in idle tsleep */ 824 #define HAMMER2_THREAD_REMASTER 0x0008 /* remaster request */ 825 #define HAMMER2_THREAD_STOP 0x0010 /* exit request */ 826 #define HAMMER2_THREAD_FREEZE 0x0020 /* force idle */ 827 #define HAMMER2_THREAD_FROZEN 0x0040 /* thread is frozen */ 828 #define HAMMER2_THREAD_XOPQ 0x0080 /* work pending */ 829 #define HAMMER2_THREAD_STOPPED 0x0100 /* thread has stopped */ 830 #define HAMMER2_THREAD_UNFREEZE 0x0200 831 832 #define HAMMER2_THREAD_WAKEUP_MASK (HAMMER2_THREAD_UNMOUNTING | \ 833 HAMMER2_THREAD_REMASTER | \ 834 HAMMER2_THREAD_STOP | \ 835 HAMMER2_THREAD_FREEZE | \ 836 HAMMER2_THREAD_XOPQ) 837 838 /* 839 * Support structure for dedup heuristic. 840 */ 841 struct hammer2_dedup { 842 hammer2_off_t data_off; 843 uint64_t data_crc; 844 uint32_t ticks; 845 uint32_t unused03; 846 }; 847 848 typedef struct hammer2_dedup hammer2_dedup_t; 849 850 /* 851 * hammer2_xop - container for VOP/XOP operation (allocated, not on stack). 852 * 853 * This structure is used to distribute a VOP operation across multiple 854 * nodes. It provides a rendezvous for concurrent node execution and 855 * can be detached from the frontend operation to allow the frontend to 856 * return early. 857 * 858 * This structure also sequences operations on up to three inodes. 859 */ 860 typedef void (*hammer2_xop_func_t)(hammer2_thread_t *thr, 861 union hammer2_xop *xop); 862 863 struct hammer2_xop_fifo { 864 TAILQ_ENTRY(hammer2_xop_head) entry; 865 hammer2_chain_t *array[HAMMER2_XOPFIFO]; 866 int errors[HAMMER2_XOPFIFO]; 867 int ri; 868 int wi; 869 int flags; 870 hammer2_thread_t *thr; 871 }; 872 873 typedef struct hammer2_xop_fifo hammer2_xop_fifo_t; 874 875 #define HAMMER2_XOP_FIFO_RUN 0x0001 876 #define HAMMER2_XOP_FIFO_STALL 0x0002 877 878 struct hammer2_xop_head { 879 hammer2_xop_func_t func; 880 hammer2_tid_t mtid; 881 struct hammer2_inode *ip1; 882 struct hammer2_inode *ip2; 883 struct hammer2_inode *ip3; 884 uint32_t check_counter; 885 uint32_t run_mask; 886 uint32_t chk_mask; 887 int flags; 888 int state; 889 int error; 890 hammer2_key_t collect_key; 891 char *name1; 892 size_t name1_len; 893 char *name2; 894 size_t name2_len; 895 hammer2_xop_fifo_t collect[HAMMER2_MAXCLUSTER]; 896 hammer2_cluster_t cluster; /* help collections */ 897 }; 898 899 typedef struct hammer2_xop_head hammer2_xop_head_t; 900 901 #define HAMMER2_XOP_CHKWAIT 0x00000001U 902 #define HAMMER2_XOP_CHKINC 0x00000002U 903 904 struct hammer2_xop_ipcluster { 905 hammer2_xop_head_t head; 906 }; 907 908 struct hammer2_xop_strategy { 909 hammer2_xop_head_t head; 910 hammer2_key_t lbase; 911 int finished; 912 hammer2_mtx_t lock; 913 struct bio *bio; 914 }; 915 916 struct hammer2_xop_readdir { 917 hammer2_xop_head_t head; 918 hammer2_key_t lkey; 919 }; 920 921 struct hammer2_xop_nresolve { 922 hammer2_xop_head_t head; 923 hammer2_key_t lhc; /* if name is NULL used lhc */ 924 }; 925 926 struct hammer2_xop_unlink { 927 hammer2_xop_head_t head; 928 int isdir; 929 int dopermanent; 930 }; 931 932 struct hammer2_xop_nrename { 933 hammer2_xop_head_t head; 934 hammer2_tid_t lhc; 935 int ip_key; 936 }; 937 938 struct hammer2_xop_scanlhc { 939 hammer2_xop_head_t head; 940 hammer2_key_t lhc; 941 }; 942 943 struct hammer2_xop_scanall { 944 hammer2_xop_head_t head; 945 hammer2_key_t key_beg; /* inclusive */ 946 hammer2_key_t key_end; /* inclusive */ 947 int resolve_flags; 948 int lookup_flags; 949 }; 950 951 struct hammer2_xop_lookup { 952 hammer2_xop_head_t head; 953 hammer2_key_t lhc; 954 }; 955 956 struct hammer2_xop_mkdirent { 957 hammer2_xop_head_t head; 958 hammer2_dirent_head_t dirent; 959 hammer2_key_t lhc; 960 }; 961 962 struct hammer2_xop_create { 963 hammer2_xop_head_t head; 964 hammer2_inode_meta_t meta; /* initial metadata */ 965 hammer2_key_t lhc; 966 int flags; 967 }; 968 969 struct hammer2_xop_destroy { 970 hammer2_xop_head_t head; 971 }; 972 973 struct hammer2_xop_fsync { 974 hammer2_xop_head_t head; 975 hammer2_inode_meta_t meta; 976 hammer2_off_t osize; 977 u_int ipflags; 978 int clear_directdata; 979 }; 980 981 struct hammer2_xop_unlinkall { 982 hammer2_xop_head_t head; 983 hammer2_key_t key_beg; 984 hammer2_key_t key_end; 985 }; 986 987 struct hammer2_xop_connect { 988 hammer2_xop_head_t head; 989 hammer2_key_t lhc; 990 }; 991 992 struct hammer2_xop_flush { 993 hammer2_xop_head_t head; 994 }; 995 996 typedef struct hammer2_xop_readdir hammer2_xop_readdir_t; 997 typedef struct hammer2_xop_nresolve hammer2_xop_nresolve_t; 998 typedef struct hammer2_xop_unlink hammer2_xop_unlink_t; 999 typedef struct hammer2_xop_nrename hammer2_xop_nrename_t; 1000 typedef struct hammer2_xop_ipcluster hammer2_xop_ipcluster_t; 1001 typedef struct hammer2_xop_strategy hammer2_xop_strategy_t; 1002 typedef struct hammer2_xop_mkdirent hammer2_xop_mkdirent_t; 1003 typedef struct hammer2_xop_create hammer2_xop_create_t; 1004 typedef struct hammer2_xop_destroy hammer2_xop_destroy_t; 1005 typedef struct hammer2_xop_fsync hammer2_xop_fsync_t; 1006 typedef struct hammer2_xop_unlinkall hammer2_xop_unlinkall_t; 1007 typedef struct hammer2_xop_scanlhc hammer2_xop_scanlhc_t; 1008 typedef struct hammer2_xop_scanall hammer2_xop_scanall_t; 1009 typedef struct hammer2_xop_lookup hammer2_xop_lookup_t; 1010 typedef struct hammer2_xop_connect hammer2_xop_connect_t; 1011 typedef struct hammer2_xop_flush hammer2_xop_flush_t; 1012 1013 union hammer2_xop { 1014 hammer2_xop_head_t head; 1015 hammer2_xop_ipcluster_t xop_ipcluster; 1016 hammer2_xop_readdir_t xop_readdir; 1017 hammer2_xop_nresolve_t xop_nresolve; 1018 hammer2_xop_unlink_t xop_unlink; 1019 hammer2_xop_nrename_t xop_nrename; 1020 hammer2_xop_strategy_t xop_strategy; 1021 hammer2_xop_mkdirent_t xop_mkdirent; 1022 hammer2_xop_create_t xop_create; 1023 hammer2_xop_destroy_t xop_destroy; 1024 hammer2_xop_fsync_t xop_fsync; 1025 hammer2_xop_unlinkall_t xop_unlinkall; 1026 hammer2_xop_scanlhc_t xop_scanlhc; 1027 hammer2_xop_scanall_t xop_scanall; 1028 hammer2_xop_lookup_t xop_lookup; 1029 hammer2_xop_flush_t xop_flush; 1030 hammer2_xop_connect_t xop_connect; 1031 }; 1032 1033 typedef union hammer2_xop hammer2_xop_t; 1034 1035 /* 1036 * hammer2_xop_group - Manage XOP support threads. 1037 */ 1038 struct hammer2_xop_group { 1039 hammer2_thread_t thrs[HAMMER2_MAXCLUSTER]; 1040 }; 1041 1042 typedef struct hammer2_xop_group hammer2_xop_group_t; 1043 1044 /* 1045 * flags to hammer2_xop_collect() 1046 */ 1047 #define HAMMER2_XOP_COLLECT_NOWAIT 0x00000001 1048 #define HAMMER2_XOP_COLLECT_WAITALL 0x00000002 1049 1050 /* 1051 * flags to hammer2_xop_alloc() 1052 * 1053 * MODIFYING - This is a modifying transaction, allocate a mtid. 1054 */ 1055 #define HAMMER2_XOP_MODIFYING 0x00000001 1056 #define HAMMER2_XOP_STRATEGY 0x00000002 1057 1058 /* 1059 * Global (per partition) management structure, represents a hard block 1060 * device. Typically referenced by hammer2_chain structures when applicable. 1061 * Typically not used for network-managed elements. 1062 * 1063 * Note that a single hammer2_dev can be indirectly tied to multiple system 1064 * mount points. There is no direct relationship. System mounts are 1065 * per-cluster-id, not per-block-device, and a single hard mount might contain 1066 * many PFSs and those PFSs might combine together in various ways to form 1067 * the set of available clusters. 1068 */ 1069 struct hammer2_dev { 1070 struct vnode *devvp; /* device vnode */ 1071 int ronly; /* read-only mount */ 1072 int mount_count; /* number of actively mounted PFSs */ 1073 TAILQ_ENTRY(hammer2_dev) mntentry; /* hammer2_mntlist */ 1074 1075 struct malloc_type *mchain; 1076 int nipstacks; 1077 int maxipstacks; 1078 kdmsg_iocom_t iocom; /* volume-level dmsg interface */ 1079 struct spinlock io_spin; /* iotree access */ 1080 struct hammer2_io_tree iotree; 1081 int iofree_count; 1082 hammer2_chain_t vchain; /* anchor chain (topology) */ 1083 hammer2_chain_t fchain; /* anchor chain (freemap) */ 1084 struct spinlock list_spin; 1085 struct h2_flush_list flushq; /* flush seeds */ 1086 struct hammer2_pfs *spmp; /* super-root pmp for transactions */ 1087 struct lock vollk; /* lockmgr lock */ 1088 struct lock bulklk; /* bulkfree operation lock */ 1089 struct lock bflock; /* bulk-free manual function lock */ 1090 hammer2_off_t heur_freemap[HAMMER2_FREEMAP_HEUR_SIZE]; 1091 hammer2_dedup_t heur_dedup[HAMMER2_DEDUP_HEUR_SIZE]; 1092 int volhdrno; /* last volhdrno written */ 1093 uint32_t hflags; /* HMNT2 flags applicable to device */ 1094 hammer2_thread_t bfthr; /* bulk-free thread */ 1095 char devrepname[64]; /* for kprintf */ 1096 hammer2_ioc_bulkfree_t bflast; /* stats for last bulkfree run */ 1097 hammer2_volume_data_t voldata; 1098 hammer2_volume_data_t volsync; /* synchronized voldata */ 1099 }; 1100 1101 typedef struct hammer2_dev hammer2_dev_t; 1102 1103 /* 1104 * Helper functions (cluster must be locked for flags to be valid). 1105 */ 1106 static __inline 1107 int 1108 hammer2_chain_rdok(hammer2_chain_t *chain) 1109 { 1110 return (chain->error == 0); 1111 } 1112 1113 static __inline 1114 int 1115 hammer2_chain_wrok(hammer2_chain_t *chain) 1116 { 1117 return (chain->error == 0 && chain->hmp->ronly == 0); 1118 } 1119 1120 /* 1121 * Per-cluster management structure. This structure will be tied to a 1122 * system mount point if the system is mounting the PFS, but is also used 1123 * to manage clusters encountered during the super-root scan or received 1124 * via LNK_SPANs that might not be mounted. 1125 * 1126 * This structure is also used to represent the super-root that hangs off 1127 * of a hard mount point. The super-root is not really a cluster element. 1128 * In this case the spmp_hmp field will be non-NULL. It's just easier to do 1129 * this than to special case super-root manipulation in the hammer2_chain* 1130 * code as being only hammer2_dev-related. 1131 * 1132 * pfs_mode and pfs_nmasters are rollup fields which critically describes 1133 * how elements of the cluster act on the cluster. pfs_mode is only applicable 1134 * when a PFS is mounted by the system. pfs_nmasters is our best guess as to 1135 * how many masters have been configured for a cluster and is always 1136 * applicable. pfs_types[] is an array with 1:1 correspondance to the 1137 * iroot cluster and describes the PFS types of the nodes making up the 1138 * cluster. 1139 * 1140 * WARNING! Portions of this structure have deferred initialization. In 1141 * particular, if not mounted there will be no wthread. 1142 * umounted network PFSs will also be missing iroot and numerous 1143 * other fields will not be initialized prior to mount. 1144 * 1145 * Synchronization threads are chain-specific and only applicable 1146 * to local hard PFS entries. A hammer2_pfs structure may contain 1147 * more than one when multiple hard PFSs are present on the local 1148 * machine which require synchronization monitoring. Most PFSs 1149 * (such as snapshots) are 1xMASTER PFSs which do not need a 1150 * synchronization thread. 1151 * 1152 * WARNING! The chains making up pfs->iroot's cluster are accounted for in 1153 * hammer2_dev->mount_count when the pfs is associated with a mount 1154 * point. 1155 */ 1156 struct hammer2_pfs { 1157 struct mount *mp; 1158 TAILQ_ENTRY(hammer2_pfs) mntentry; /* hammer2_pfslist */ 1159 uuid_t pfs_clid; 1160 hammer2_dev_t *spmp_hmp; /* only if super-root pmp */ 1161 hammer2_dev_t *force_local; /* only if 'local' mount */ 1162 hammer2_inode_t *iroot; /* PFS root inode */ 1163 uint8_t pfs_types[HAMMER2_MAXCLUSTER]; 1164 char *pfs_names[HAMMER2_MAXCLUSTER]; 1165 hammer2_dev_t *pfs_hmps[HAMMER2_MAXCLUSTER]; 1166 hammer2_trans_t trans; 1167 struct lock lock; /* PFS lock for certain ops */ 1168 struct lock lock_nlink; /* rename and nlink lock */ 1169 struct netexport export; /* nfs export */ 1170 int ronly; /* read-only mount */ 1171 int hflags; /* pfs-specific mount flags */ 1172 struct malloc_type *minode; 1173 struct malloc_type *mmsg; 1174 struct spinlock inum_spin; /* inumber lookup */ 1175 struct hammer2_inode_tree inum_tree; /* (not applicable to spmp) */ 1176 struct spinlock lru_spin; /* inumber lookup */ 1177 struct hammer2_chain_list lru_list; /* chains on LRU */ 1178 int lru_count; /* #of chains on LRU */ 1179 hammer2_tid_t modify_tid; /* modify transaction id */ 1180 hammer2_tid_t inode_tid; /* inode allocator */ 1181 uint8_t pfs_nmasters; /* total masters */ 1182 uint8_t pfs_mode; /* operating mode PFSMODE */ 1183 uint8_t unused01; 1184 uint8_t unused02; 1185 int unused03; 1186 long inmem_inodes; 1187 uint32_t inmem_dirty_chains; 1188 int count_lwinprog; /* logical write in prog */ 1189 struct spinlock list_spin; 1190 struct h2_sideq_list sideq; /* last-close dirty/unlink */ 1191 hammer2_thread_t sync_thrs[HAMMER2_MAXCLUSTER]; 1192 uint32_t cluster_flags; /* cached cluster flags */ 1193 int has_xop_threads; 1194 struct spinlock xop_spin; /* xop sequencer */ 1195 hammer2_xop_group_t xop_groups[HAMMER2_XOPGROUPS]; 1196 }; 1197 1198 typedef struct hammer2_pfs hammer2_pfs_t; 1199 1200 TAILQ_HEAD(hammer2_pfslist, hammer2_pfs); 1201 1202 #define HAMMER2_LRU_LIMIT 1024 /* per pmp lru_list */ 1203 1204 #define HAMMER2_DIRTYCHAIN_WAITING 0x80000000 1205 #define HAMMER2_DIRTYCHAIN_MASK 0x7FFFFFFF 1206 1207 #define HAMMER2_LWINPROG_WAITING 0x80000000 1208 #define HAMMER2_LWINPROG_WAITING0 0x40000000 1209 #define HAMMER2_LWINPROG_MASK 0x3FFFFFFF 1210 1211 /* 1212 * hammer2_cluster_check 1213 */ 1214 #define HAMMER2_CHECK_NULL 0x00000001 1215 1216 /* 1217 * Bulkscan 1218 */ 1219 #define HAMMER2_BULK_ABORT 0x00000001 1220 1221 /* 1222 * Misc 1223 */ 1224 #if defined(_KERNEL) 1225 1226 MALLOC_DECLARE(M_HAMMER2); 1227 1228 #define VTOI(vp) ((hammer2_inode_t *)(vp)->v_data) 1229 #define ITOV(ip) ((ip)->vp) 1230 1231 /* 1232 * Currently locked chains retain the locked buffer cache buffer for 1233 * indirect blocks, and indirect blocks can be one of two sizes. The 1234 * device buffer has to match the case to avoid deadlocking recursive 1235 * chains that might otherwise try to access different offsets within 1236 * the same device buffer. 1237 */ 1238 static __inline 1239 int 1240 hammer2_devblkradix(int radix) 1241 { 1242 #if 0 1243 if (radix <= HAMMER2_LBUFRADIX) { 1244 return (HAMMER2_LBUFRADIX); 1245 } else { 1246 return (HAMMER2_PBUFRADIX); 1247 } 1248 #endif 1249 return (HAMMER2_PBUFRADIX); 1250 } 1251 1252 /* 1253 * XXX almost time to remove this. DIO uses PBUFSIZE exclusively now. 1254 */ 1255 static __inline 1256 size_t 1257 hammer2_devblksize(size_t bytes) 1258 { 1259 #if 0 1260 if (bytes <= HAMMER2_LBUFSIZE) { 1261 return(HAMMER2_LBUFSIZE); 1262 } else { 1263 KKASSERT(bytes <= HAMMER2_PBUFSIZE && 1264 (bytes ^ (bytes - 1)) == ((bytes << 1) - 1)); 1265 return (HAMMER2_PBUFSIZE); 1266 } 1267 #endif 1268 return (HAMMER2_PBUFSIZE); 1269 } 1270 1271 1272 static __inline 1273 hammer2_pfs_t * 1274 MPTOPMP(struct mount *mp) 1275 { 1276 return ((hammer2_pfs_t *)mp->mnt_data); 1277 } 1278 1279 #define LOCKSTART int __nlocks = curthread->td_locks 1280 #define LOCKENTER (++curthread->td_locks) 1281 #define LOCKEXIT (--curthread->td_locks) 1282 #define LOCKSTOP KKASSERT(curthread->td_locks == __nlocks) 1283 1284 extern struct vop_ops hammer2_vnode_vops; 1285 extern struct vop_ops hammer2_spec_vops; 1286 extern struct vop_ops hammer2_fifo_vops; 1287 extern struct hammer2_pfslist hammer2_pfslist; 1288 extern struct lock hammer2_mntlk; 1289 1290 1291 extern int hammer2_debug; 1292 extern int hammer2_cluster_read; 1293 extern int hammer2_cluster_write; 1294 extern int hammer2_dedup_enable; 1295 extern int hammer2_inval_enable; 1296 extern int hammer2_flush_pipe; 1297 extern int hammer2_synchronous_flush; 1298 extern int hammer2_dio_count; 1299 extern long hammer2_chain_allocs; 1300 extern long hammer2_chain_frees; 1301 extern long hammer2_limit_dirty_chains; 1302 extern long hammer2_count_modified_chains; 1303 extern long hammer2_iod_invals; 1304 extern long hammer2_iod_file_read; 1305 extern long hammer2_iod_meta_read; 1306 extern long hammer2_iod_indr_read; 1307 extern long hammer2_iod_fmap_read; 1308 extern long hammer2_iod_volu_read; 1309 extern long hammer2_iod_file_write; 1310 extern long hammer2_iod_file_wembed; 1311 extern long hammer2_iod_file_wzero; 1312 extern long hammer2_iod_file_wdedup; 1313 extern long hammer2_iod_meta_write; 1314 extern long hammer2_iod_indr_write; 1315 extern long hammer2_iod_fmap_write; 1316 extern long hammer2_iod_volu_write; 1317 1318 extern long hammer2_check_xxhash64; 1319 extern long hammer2_check_icrc32; 1320 1321 extern struct objcache *cache_buffer_read; 1322 extern struct objcache *cache_buffer_write; 1323 extern struct objcache *cache_xops; 1324 1325 /* 1326 * hammer2_subr.c 1327 */ 1328 #define hammer2_icrc32(buf, size) iscsi_crc32((buf), (size)) 1329 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc)) 1330 1331 int hammer2_signal_check(time_t *timep); 1332 const char *hammer2_error_str(int error); 1333 1334 void hammer2_inode_lock(hammer2_inode_t *ip, int how); 1335 void hammer2_inode_unlock(hammer2_inode_t *ip); 1336 hammer2_chain_t *hammer2_inode_chain(hammer2_inode_t *ip, int clindex, int how); 1337 hammer2_chain_t *hammer2_inode_chain_and_parent(hammer2_inode_t *ip, 1338 int clindex, hammer2_chain_t **parentp, int how); 1339 hammer2_mtx_state_t hammer2_inode_lock_temp_release(hammer2_inode_t *ip); 1340 void hammer2_inode_lock_temp_restore(hammer2_inode_t *ip, 1341 hammer2_mtx_state_t ostate); 1342 int hammer2_inode_lock_upgrade(hammer2_inode_t *ip); 1343 void hammer2_inode_lock_downgrade(hammer2_inode_t *ip, int); 1344 1345 void hammer2_dev_exlock(hammer2_dev_t *hmp); 1346 void hammer2_dev_shlock(hammer2_dev_t *hmp); 1347 void hammer2_dev_unlock(hammer2_dev_t *hmp); 1348 1349 int hammer2_get_dtype(uint8_t type); 1350 int hammer2_get_vtype(uint8_t type); 1351 uint8_t hammer2_get_obj_type(enum vtype vtype); 1352 void hammer2_time_to_timespec(uint64_t xtime, struct timespec *ts); 1353 uint64_t hammer2_timespec_to_time(const struct timespec *ts); 1354 uint32_t hammer2_to_unix_xid(const uuid_t *uuid); 1355 void hammer2_guid_to_uuid(uuid_t *uuid, uint32_t guid); 1356 void hammer2_trans_manage_init(hammer2_pfs_t *pmp); 1357 1358 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len); 1359 int hammer2_getradix(size_t bytes); 1360 1361 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff, 1362 hammer2_key_t *lbasep, hammer2_key_t *leofp); 1363 int hammer2_calc_physical(hammer2_inode_t *ip, hammer2_key_t lbase); 1364 void hammer2_update_time(uint64_t *timep); 1365 void hammer2_adjreadcounter(hammer2_blockref_t *bref, size_t bytes); 1366 1367 /* 1368 * hammer2_inode.c 1369 */ 1370 struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp); 1371 hammer2_inode_t *hammer2_inode_lookup(hammer2_pfs_t *pmp, 1372 hammer2_tid_t inum); 1373 hammer2_inode_t *hammer2_inode_get(hammer2_pfs_t *pmp, hammer2_inode_t *dip, 1374 hammer2_cluster_t *cluster, int idx); 1375 void hammer2_inode_free(hammer2_inode_t *ip); 1376 void hammer2_inode_ref(hammer2_inode_t *ip); 1377 void hammer2_inode_drop(hammer2_inode_t *ip); 1378 void hammer2_inode_repoint(hammer2_inode_t *ip, hammer2_inode_t *pip, 1379 hammer2_cluster_t *cluster); 1380 void hammer2_inode_repoint_one(hammer2_inode_t *ip, hammer2_cluster_t *cluster, 1381 int idx); 1382 void hammer2_inode_modify(hammer2_inode_t *ip); 1383 void hammer2_inode_run_sideq(hammer2_pfs_t *pmp); 1384 1385 hammer2_inode_t *hammer2_inode_create(hammer2_inode_t *dip, 1386 hammer2_inode_t *pip, 1387 struct vattr *vap, struct ucred *cred, 1388 const uint8_t *name, size_t name_len, hammer2_key_t lhc, 1389 hammer2_key_t inum, uint8_t type, uint8_t target_type, 1390 int flags, int *errorp); 1391 void hammer2_inode_chain_sync(hammer2_inode_t *ip); 1392 int hammer2_inode_unlink_finisher(hammer2_inode_t *ip, int isopen); 1393 int hammer2_dirent_create(hammer2_inode_t *dip, const char *name, 1394 size_t name_len, hammer2_key_t inum, uint8_t type); 1395 1396 /* 1397 * hammer2_chain.c 1398 */ 1399 void hammer2_voldata_lock(hammer2_dev_t *hmp); 1400 void hammer2_voldata_unlock(hammer2_dev_t *hmp); 1401 void hammer2_voldata_modify(hammer2_dev_t *hmp); 1402 hammer2_chain_t *hammer2_chain_alloc(hammer2_dev_t *hmp, 1403 hammer2_pfs_t *pmp, 1404 hammer2_blockref_t *bref); 1405 void hammer2_chain_core_init(hammer2_chain_t *chain); 1406 void hammer2_chain_ref(hammer2_chain_t *chain); 1407 void hammer2_chain_ref_hold(hammer2_chain_t *chain); 1408 void hammer2_chain_drop(hammer2_chain_t *chain); 1409 void hammer2_chain_drop_unhold(hammer2_chain_t *chain); 1410 void hammer2_chain_lock(hammer2_chain_t *chain, int how); 1411 void hammer2_chain_lock_unhold(hammer2_chain_t *chain, int how); 1412 #if 0 1413 void hammer2_chain_push_shared_lock(hammer2_chain_t *chain); 1414 void hammer2_chain_pull_shared_lock(hammer2_chain_t *chain); 1415 #endif 1416 void hammer2_chain_load_data(hammer2_chain_t *chain); 1417 const hammer2_media_data_t *hammer2_chain_rdata(hammer2_chain_t *chain); 1418 hammer2_media_data_t *hammer2_chain_wdata(hammer2_chain_t *chain); 1419 int hammer2_chain_snapshot(hammer2_chain_t *chain, hammer2_ioc_pfs_t *pmp, 1420 hammer2_tid_t mtid); 1421 1422 int hammer2_chain_inode_find(hammer2_pfs_t *pmp, hammer2_key_t inum, 1423 int clindex, int flags, 1424 hammer2_chain_t **parentp, 1425 hammer2_chain_t **chainp); 1426 void hammer2_chain_modify(hammer2_chain_t *chain, hammer2_tid_t mtid, 1427 hammer2_off_t dedup_off, int flags); 1428 void hammer2_chain_modify_ip(hammer2_inode_t *ip, hammer2_chain_t *chain, 1429 hammer2_tid_t mtid, int flags); 1430 void hammer2_chain_resize(hammer2_chain_t *chain, 1431 hammer2_tid_t mtid, hammer2_off_t dedup_off, 1432 int nradix, int flags); 1433 void hammer2_chain_unlock(hammer2_chain_t *chain); 1434 void hammer2_chain_unlock_hold(hammer2_chain_t *chain); 1435 void hammer2_chain_wait(hammer2_chain_t *chain); 1436 hammer2_chain_t *hammer2_chain_get(hammer2_chain_t *parent, int generation, 1437 hammer2_blockref_t *bref); 1438 hammer2_chain_t *hammer2_chain_lookup_init(hammer2_chain_t *parent, int flags); 1439 void hammer2_chain_lookup_done(hammer2_chain_t *parent); 1440 hammer2_chain_t *hammer2_chain_getparent(hammer2_chain_t **parentp, int how); 1441 hammer2_chain_t *hammer2_chain_lookup(hammer2_chain_t **parentp, 1442 hammer2_key_t *key_nextp, 1443 hammer2_key_t key_beg, hammer2_key_t key_end, 1444 int *cache_indexp, int flags); 1445 hammer2_chain_t *hammer2_chain_next(hammer2_chain_t **parentp, 1446 hammer2_chain_t *chain, 1447 hammer2_key_t *key_nextp, 1448 hammer2_key_t key_beg, hammer2_key_t key_end, 1449 int *cache_indexp, int flags); 1450 hammer2_blockref_t *hammer2_chain_scan(hammer2_chain_t *parent, 1451 hammer2_chain_t **chainp, 1452 hammer2_blockref_t *bref, 1453 int *firstp, int *cache_indexp, int flags); 1454 1455 int hammer2_chain_create(hammer2_chain_t **parentp, hammer2_chain_t **chainp, 1456 hammer2_pfs_t *pmp, int methods, 1457 hammer2_key_t key, int keybits, 1458 int type, size_t bytes, hammer2_tid_t mtid, 1459 hammer2_off_t dedup_off, int flags); 1460 void hammer2_chain_rename(hammer2_blockref_t *bref, 1461 hammer2_chain_t **parentp, 1462 hammer2_chain_t *chain, 1463 hammer2_tid_t mtid, int flags); 1464 void hammer2_chain_delete(hammer2_chain_t *parent, hammer2_chain_t *chain, 1465 hammer2_tid_t mtid, int flags); 1466 void hammer2_chain_setflush(hammer2_chain_t *chain); 1467 void hammer2_chain_countbrefs(hammer2_chain_t *chain, 1468 hammer2_blockref_t *base, int count); 1469 hammer2_chain_t *hammer2_chain_bulksnap(hammer2_chain_t *chain); 1470 void hammer2_chain_bulkdrop(hammer2_chain_t *copy); 1471 1472 void hammer2_chain_setcheck(hammer2_chain_t *chain, void *bdata); 1473 int hammer2_chain_testcheck(hammer2_chain_t *chain, void *bdata); 1474 int hammer2_chain_dirent_test(hammer2_chain_t *chain, const char *name, 1475 size_t name_len); 1476 1477 void hammer2_pfs_memory_wait(hammer2_pfs_t *pmp); 1478 void hammer2_pfs_memory_inc(hammer2_pfs_t *pmp); 1479 void hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp); 1480 1481 void hammer2_base_delete(hammer2_chain_t *chain, 1482 hammer2_blockref_t *base, int count, 1483 int *cache_indexp, hammer2_chain_t *child); 1484 void hammer2_base_insert(hammer2_chain_t *chain, 1485 hammer2_blockref_t *base, int count, 1486 int *cache_indexp, hammer2_chain_t *child); 1487 1488 /* 1489 * hammer2_flush.c 1490 */ 1491 hammer2_chain_t *hammer2_flush_quick(hammer2_dev_t *hmp); 1492 void hammer2_flush(hammer2_chain_t *chain, int istop); 1493 void hammer2_delayed_flush(hammer2_chain_t *chain); 1494 1495 /* 1496 * hammer2_trans.c 1497 */ 1498 void hammer2_trans_init(hammer2_pfs_t *pmp, uint32_t flags); 1499 hammer2_tid_t hammer2_trans_sub(hammer2_pfs_t *pmp); 1500 void hammer2_trans_done(hammer2_pfs_t *pmp); 1501 hammer2_tid_t hammer2_trans_newinum(hammer2_pfs_t *pmp); 1502 void hammer2_trans_assert_strategy(hammer2_pfs_t *pmp); 1503 void hammer2_dedup_record(hammer2_chain_t *chain, char *data); 1504 1505 /* 1506 * hammer2_ioctl.c 1507 */ 1508 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data, 1509 int fflag, struct ucred *cred); 1510 1511 /* 1512 * hammer2_io.c 1513 */ 1514 void hammer2_io_putblk(hammer2_io_t **diop); 1515 void hammer2_io_cleanup(hammer2_dev_t *hmp, struct hammer2_io_tree *tree); 1516 char *hammer2_io_data(hammer2_io_t *dio, off_t lbase); 1517 hammer2_io_t *hammer2_io_getquick(hammer2_dev_t *hmp, off_t lbase, int lsize); 1518 void hammer2_io_resetinval(hammer2_dev_t *hmp, off_t lbase); 1519 void hammer2_io_getblk(hammer2_dev_t *hmp, off_t lbase, int lsize, 1520 hammer2_iocb_t *iocb); 1521 void hammer2_io_complete(hammer2_iocb_t *iocb); 1522 void hammer2_io_callback(struct bio *bio); 1523 void hammer2_iocb_wait(hammer2_iocb_t *iocb); 1524 int hammer2_io_new(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize, 1525 hammer2_io_t **diop); 1526 int hammer2_io_newnz(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize, 1527 hammer2_io_t **diop); 1528 void hammer2_io_newq(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize); 1529 int hammer2_io_bread(hammer2_dev_t *hmp, int btype, off_t lbase, int lsize, 1530 hammer2_io_t **diop); 1531 void hammer2_io_bawrite(hammer2_io_t **diop); 1532 void hammer2_io_bdwrite(hammer2_io_t **diop); 1533 int hammer2_io_bwrite(hammer2_io_t **diop); 1534 int hammer2_io_isdirty(hammer2_io_t *dio); 1535 void hammer2_io_setdirty(hammer2_io_t *dio); 1536 void hammer2_io_setinval(hammer2_io_t *dio, hammer2_off_t off, u_int bytes); 1537 void hammer2_io_brelse(hammer2_io_t **diop); 1538 void hammer2_io_bqrelse(hammer2_io_t **diop); 1539 int hammer2_io_crc_good(hammer2_chain_t *chain, uint64_t *maskp); 1540 void hammer2_io_crc_setmask(hammer2_io_t *dio, uint64_t mask); 1541 void hammer2_io_crc_clrmask(hammer2_io_t *dio, uint64_t mask); 1542 1543 /* 1544 * hammer2_thread.c 1545 */ 1546 void hammer2_thr_signal(hammer2_thread_t *thr, uint32_t flags); 1547 void hammer2_thr_signal2(hammer2_thread_t *thr, 1548 uint32_t pflags, uint32_t nflags); 1549 void hammer2_thr_wait(hammer2_thread_t *thr, uint32_t flags); 1550 void hammer2_thr_wait_neg(hammer2_thread_t *thr, uint32_t flags); 1551 int hammer2_thr_wait_any(hammer2_thread_t *thr, uint32_t flags, int timo); 1552 void hammer2_thr_create(hammer2_thread_t *thr, 1553 hammer2_pfs_t *pmp, hammer2_dev_t *hmp, 1554 const char *id, int clindex, int repidx, 1555 void (*func)(void *arg)); 1556 void hammer2_thr_delete(hammer2_thread_t *thr); 1557 void hammer2_thr_remaster(hammer2_thread_t *thr); 1558 void hammer2_thr_freeze_async(hammer2_thread_t *thr); 1559 void hammer2_thr_freeze(hammer2_thread_t *thr); 1560 void hammer2_thr_unfreeze(hammer2_thread_t *thr); 1561 int hammer2_thr_break(hammer2_thread_t *thr); 1562 void hammer2_primary_xops_thread(void *arg); 1563 1564 /* 1565 * hammer2_thread.c (XOP API) 1566 */ 1567 void hammer2_xop_group_init(hammer2_pfs_t *pmp, hammer2_xop_group_t *xgrp); 1568 void *hammer2_xop_alloc(hammer2_inode_t *ip, int flags); 1569 void hammer2_xop_setname(hammer2_xop_head_t *xop, 1570 const char *name, size_t name_len); 1571 void hammer2_xop_setname2(hammer2_xop_head_t *xop, 1572 const char *name, size_t name_len); 1573 size_t hammer2_xop_setname_inum(hammer2_xop_head_t *xop, hammer2_key_t inum); 1574 void hammer2_xop_setip2(hammer2_xop_head_t *xop, hammer2_inode_t *ip2); 1575 void hammer2_xop_setip3(hammer2_xop_head_t *xop, hammer2_inode_t *ip3); 1576 void hammer2_xop_reinit(hammer2_xop_head_t *xop); 1577 void hammer2_xop_helper_create(hammer2_pfs_t *pmp); 1578 void hammer2_xop_helper_cleanup(hammer2_pfs_t *pmp); 1579 void hammer2_xop_start(hammer2_xop_head_t *xop, hammer2_xop_func_t func); 1580 void hammer2_xop_start_except(hammer2_xop_head_t *xop, hammer2_xop_func_t func, 1581 int notidx); 1582 int hammer2_xop_collect(hammer2_xop_head_t *xop, int flags); 1583 void hammer2_xop_retire(hammer2_xop_head_t *xop, uint32_t mask); 1584 int hammer2_xop_active(hammer2_xop_head_t *xop); 1585 int hammer2_xop_feed(hammer2_xop_head_t *xop, hammer2_chain_t *chain, 1586 int clindex, int error); 1587 1588 /* 1589 * hammer2_synchro.c 1590 */ 1591 void hammer2_primary_sync_thread(void *arg); 1592 1593 /* 1594 * XOP backends in hammer2_xops.c, primarily for VNOPS. Other XOP backends 1595 * may be integrated into other source files. 1596 */ 1597 void hammer2_xop_ipcluster(hammer2_thread_t *thr, hammer2_xop_t *xop); 1598 void hammer2_xop_readdir(hammer2_thread_t *thr, hammer2_xop_t *xop); 1599 void hammer2_xop_nresolve(hammer2_thread_t *thr, hammer2_xop_t *xop); 1600 void hammer2_xop_unlink(hammer2_thread_t *thr, hammer2_xop_t *xop); 1601 void hammer2_xop_nrename(hammer2_thread_t *thr, hammer2_xop_t *xop); 1602 void hammer2_xop_scanlhc(hammer2_thread_t *thr, hammer2_xop_t *xop); 1603 void hammer2_xop_scanall(hammer2_thread_t *thr, hammer2_xop_t *xop); 1604 void hammer2_xop_lookup(hammer2_thread_t *thr, hammer2_xop_t *xop); 1605 void hammer2_inode_xop_mkdirent(hammer2_thread_t *thr, hammer2_xop_t *xop); 1606 void hammer2_inode_xop_create(hammer2_thread_t *thr, hammer2_xop_t *xop); 1607 void hammer2_inode_xop_destroy(hammer2_thread_t *thr, hammer2_xop_t *xop); 1608 void hammer2_inode_xop_chain_sync(hammer2_thread_t *thr, hammer2_xop_t *xop); 1609 void hammer2_inode_xop_unlinkall(hammer2_thread_t *thr, hammer2_xop_t *xop); 1610 void hammer2_inode_xop_connect(hammer2_thread_t *thr, hammer2_xop_t *xop); 1611 void hammer2_inode_xop_flush(hammer2_thread_t *thr, hammer2_xop_t *xop); 1612 1613 /* 1614 * hammer2_msgops.c 1615 */ 1616 int hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg); 1617 int hammer2_msg_adhoc_input(kdmsg_msg_t *msg); 1618 1619 /* 1620 * hammer2_vfsops.c 1621 */ 1622 void hammer2_volconf_update(hammer2_dev_t *hmp, int index); 1623 void hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp, char pfx); 1624 int hammer2_vfs_sync(struct mount *mp, int waitflags); 1625 hammer2_pfs_t *hammer2_pfsalloc(hammer2_chain_t *chain, 1626 const hammer2_inode_data_t *ripdata, 1627 hammer2_tid_t modify_tid, 1628 hammer2_dev_t *force_local); 1629 void hammer2_pfsdealloc(hammer2_pfs_t *pmp, int clindex, int destroying); 1630 int hammer2_vfs_vget(struct mount *mp, struct vnode *dvp, 1631 ino_t ino, struct vnode **vpp); 1632 1633 void hammer2_lwinprog_ref(hammer2_pfs_t *pmp); 1634 void hammer2_lwinprog_drop(hammer2_pfs_t *pmp); 1635 void hammer2_lwinprog_wait(hammer2_pfs_t *pmp, int pipe); 1636 1637 /* 1638 * hammer2_freemap.c 1639 */ 1640 int hammer2_freemap_alloc(hammer2_chain_t *chain, size_t bytes); 1641 void hammer2_freemap_adjust(hammer2_dev_t *hmp, 1642 hammer2_blockref_t *bref, int how); 1643 1644 /* 1645 * hammer2_cluster.c 1646 */ 1647 uint8_t hammer2_cluster_type(hammer2_cluster_t *cluster); 1648 const hammer2_media_data_t *hammer2_cluster_rdata(hammer2_cluster_t *cluster); 1649 hammer2_media_data_t *hammer2_cluster_wdata(hammer2_cluster_t *cluster); 1650 hammer2_cluster_t *hammer2_cluster_from_chain(hammer2_chain_t *chain); 1651 void hammer2_cluster_bref(hammer2_cluster_t *cluster, hammer2_blockref_t *bref); 1652 hammer2_cluster_t *hammer2_cluster_alloc(hammer2_pfs_t *pmp, 1653 hammer2_blockref_t *bref); 1654 void hammer2_cluster_ref(hammer2_cluster_t *cluster); 1655 void hammer2_cluster_drop(hammer2_cluster_t *cluster); 1656 void hammer2_cluster_lock(hammer2_cluster_t *cluster, int how); 1657 int hammer2_cluster_check(hammer2_cluster_t *cluster, hammer2_key_t lokey, 1658 int flags); 1659 void hammer2_cluster_resolve(hammer2_cluster_t *cluster); 1660 void hammer2_cluster_forcegood(hammer2_cluster_t *cluster); 1661 void hammer2_cluster_unlock(hammer2_cluster_t *cluster); 1662 1663 void hammer2_bulkfree_init(hammer2_dev_t *hmp); 1664 void hammer2_bulkfree_uninit(hammer2_dev_t *hmp); 1665 int hammer2_bulkfree_pass(hammer2_dev_t *hmp, struct hammer2_ioc_bulkfree *bfi); 1666 1667 /* 1668 * hammer2_iocom.c 1669 */ 1670 void hammer2_iocom_init(hammer2_dev_t *hmp); 1671 void hammer2_iocom_uninit(hammer2_dev_t *hmp); 1672 void hammer2_cluster_reconnect(hammer2_dev_t *hmp, struct file *fp); 1673 1674 /* 1675 * hammer2_strategy.c 1676 */ 1677 int hammer2_vop_strategy(struct vop_strategy_args *ap); 1678 int hammer2_vop_bmap(struct vop_bmap_args *ap); 1679 void hammer2_write_thread(void *arg); 1680 void hammer2_bioq_sync(hammer2_pfs_t *pmp); 1681 void hammer2_dedup_clear(hammer2_dev_t *hmp); 1682 1683 #endif /* !_KERNEL */ 1684 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */ 1685