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