2 * Copyright (c) 2011-2015 The DragonFly Project. All rights reserved.
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>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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13 * notice, this list of conditions and the following disclaimer.
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23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
39 * This header file contains structures used internally by the HAMMER2
40 * implementation. See hammer2_disk.h for on-disk structures.
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.
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.
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
57 * The in-memory representation may remain cached (for example in order to
58 * placemark clustering locks) even after the related data has been
62 #ifndef _VFS_HAMMER2_HAMMER2_H_
63 #define _VFS_HAMMER2_HAMMER2_H_
65 #include <sys/param.h>
66 #include <sys/types.h>
67 #include <sys/kernel.h>
69 #include <sys/systm.h>
71 #include <sys/malloc.h>
72 #include <sys/mount.h>
73 #include <sys/vnode.h>
75 #include <sys/mountctl.h>
78 #include <sys/thread.h>
79 #include <sys/globaldata.h>
80 #include <sys/lockf.h>
82 #include <sys/queue.h>
83 #include <sys/limits.h>
85 #include <sys/mutex.h>
86 #include <sys/kern_syscall.h>
88 #include <sys/signal2.h>
90 #include <sys/mutex2.h>
91 #include <sys/thread2.h>
93 #include "hammer2_disk.h"
94 #include "hammer2_mount.h"
95 #include "hammer2_ioctl.h"
100 struct hammer2_cluster;
101 struct hammer2_inode;
105 struct hammer2_state;
109 * Mutex and lock shims. Hammer2 requires support for asynchronous and
110 * abortable locks, and both exclusive and shared spinlocks. Normal
111 * synchronous non-abortable locks can be substituted for spinlocks.
113 typedef mtx_t hammer2_mtx_t;
114 typedef mtx_link_t hammer2_mtx_link_t;
115 typedef mtx_state_t hammer2_mtx_state_t;
117 typedef struct spinlock hammer2_spin_t;
119 #define hammer2_mtx_ex mtx_lock_ex_quick
120 #define hammer2_mtx_sh mtx_lock_sh_quick
121 #define hammer2_mtx_unlock mtx_unlock
122 #define hammer2_mtx_owned mtx_owned
123 #define hammer2_mtx_init mtx_init
124 #define hammer2_mtx_temp_release mtx_lock_temp_release
125 #define hammer2_mtx_temp_restore mtx_lock_temp_restore
126 #define hammer2_mtx_refs mtx_lockrefs
128 #define hammer2_spin_init spin_init
129 #define hammer2_spin_sh spin_lock_shared
130 #define hammer2_spin_ex spin_lock
131 #define hammer2_spin_unsh spin_unlock_shared
132 #define hammer2_spin_unex spin_unlock
135 * General lock support
139 hammer2_mtx_upgrade(hammer2_mtx_t *mtx)
143 if (mtx_islocked_ex(mtx)) {
147 mtx_lock_ex_quick(mtx);
154 * Downgrade an inode lock from exclusive to shared only if the inode
155 * lock was previously shared. If the inode lock was previously exclusive,
160 hammer2_mtx_downgrade(hammer2_mtx_t *mtx, int wasexclusive)
162 if (wasexclusive == 0)
167 * The xid tracks internal transactional updates.
169 * XXX fix-me, really needs to be 64-bits
171 typedef uint32_t hammer2_xid_t;
173 #define HAMMER2_XID_MIN 0x00000000U
174 #define HAMMER2_XID_MAX 0x7FFFFFFFU
177 * The chain structure tracks a portion of the media topology from the
178 * root (volume) down. Chains represent volumes, inodes, indirect blocks,
179 * data blocks, and freemap nodes and leafs.
181 * The chain structure utilizes a simple singly-homed topology and the
182 * chain's in-memory topology will move around as the chains do, due mainly
183 * to renames and indirect block creation.
185 * Block Table Updates
187 * Block table updates for insertions and updates are delayed until the
188 * flush. This allows us to avoid having to modify the parent chain
189 * all the way to the root.
191 * Block table deletions are performed immediately (modifying the parent
192 * in the process) because the flush code uses the chain structure to
193 * track delayed updates and the chain will be (likely) gone or moved to
194 * another location in the topology after a deletion.
196 * A prior iteration of the code tried to keep the relationship intact
197 * on deletes by doing a delete-duplicate operation on the chain, but
198 * it added way too much complexity to the codebase.
200 * Flush Synchronization
202 * The flush code must flush modified chains bottom-up. Because chain
203 * structures can shift around and are NOT topologically stable,
204 * modified chains are independently indexed for the flush. As the flush
205 * runs it modifies (or further modifies) and updates the parents,
206 * propagating the flush all the way to the volume root.
208 * Modifying front-end operations can occur during a flush but will block
209 * in two cases: (1) when the front-end tries to operate on the inode
210 * currently in the midst of being flushed and (2) if the front-end
211 * crosses an inode currently being flushed (such as during a rename).
212 * So, for example, if you rename directory "x" to "a/b/c/d/e/f/g/x" and
213 * the flusher is currently working on "a/b/c", the rename will block
214 * temporarily in order to ensure that "x" exists in one place or the
217 * Meta-data statistics are updated by the flusher. The front-end will
218 * make estimates but meta-data must be fully synchronized only during a
219 * flush in order to ensure that it remains correct across a crash.
221 * Multiple flush synchronizations can theoretically be in-flight at the
222 * same time but the implementation is not coded to handle the case and
223 * currently serializes them.
227 * Snapshots currently require the subdirectory tree being snapshotted
228 * to be flushed. The snapshot then creates a new super-root inode which
229 * copies the flushed blockdata of the directory or file that was
234 * - Note that the radix tree runs in powers of 2 only so sub-trees
235 * cannot straddle edges.
237 RB_HEAD(hammer2_chain_tree, hammer2_chain);
238 TAILQ_HEAD(h2_flush_list, hammer2_chain);
239 TAILQ_HEAD(h2_core_list, hammer2_chain);
240 TAILQ_HEAD(h2_iocb_list, hammer2_iocb);
242 #define CHAIN_CORE_DELETE_BMAP_ENTRIES \
243 (HAMMER2_PBUFSIZE / sizeof(hammer2_blockref_t) / sizeof(uint32_t))
245 struct hammer2_chain_core {
248 struct hammer2_chain_tree rbtree; /* sub-chains */
249 int live_zero; /* blockref array opt */
251 u_int live_count; /* live (not deleted) chains in tree */
252 u_int chain_count; /* live + deleted chains under core */
253 int generation; /* generation number (inserts only) */
256 typedef struct hammer2_chain_core hammer2_chain_core_t;
258 #define HAMMER2_CORE_UNUSED0001 0x0001
259 #define HAMMER2_CORE_COUNTEDBREFS 0x0002
261 RB_HEAD(hammer2_io_tree, hammer2_io);
264 * IOCB - IO callback (into chain, cluster, or manual request)
266 struct hammer2_iocb {
267 TAILQ_ENTRY(hammer2_iocb) entry;
268 void (*callback)(struct hammer2_iocb *iocb);
269 struct hammer2_io *dio;
270 struct hammer2_cluster *cluster;
271 struct hammer2_chain *chain;
279 typedef struct hammer2_iocb hammer2_iocb_t;
281 #define HAMMER2_IOCB_INTERLOCK 0x00000001
282 #define HAMMER2_IOCB_ONQ 0x00000002
283 #define HAMMER2_IOCB_DONE 0x00000004
284 #define HAMMER2_IOCB_INPROG 0x00000008
285 #define HAMMER2_IOCB_UNUSED10 0x00000010
286 #define HAMMER2_IOCB_QUICK 0x00010000
287 #define HAMMER2_IOCB_ZERO 0x00020000
288 #define HAMMER2_IOCB_READ 0x00040000
289 #define HAMMER2_IOCB_WAKEUP 0x00080000
292 * DIO - Management structure wrapping system buffer cache.
294 * Used for multiple purposes including concurrent management
295 * if small requests by chains into larger DIOs.
298 RB_ENTRY(hammer2_io) rbnode; /* indexed by device offset */
299 struct h2_iocb_list iocbq;
300 struct spinlock spin;
301 struct hammer2_dev *hmp;
306 int act; /* activity */
309 typedef struct hammer2_io hammer2_io_t;
311 #define HAMMER2_DIO_INPROG 0x80000000 /* bio in progress */
312 #define HAMMER2_DIO_GOOD 0x40000000 /* dio->bp is stable */
313 #define HAMMER2_DIO_WAITING 0x20000000 /* (old) */
314 #define HAMMER2_DIO_DIRTY 0x10000000 /* flush on last drop */
316 #define HAMMER2_DIO_MASK 0x0FFFFFFF
319 * Primary chain structure keeps track of the topology in-memory.
321 struct hammer2_chain {
322 hammer2_chain_core_t core;
323 RB_ENTRY(hammer2_chain) rbnode; /* live chain(s) */
324 hammer2_blockref_t bref;
325 struct hammer2_chain *parent;
326 struct hammer2_state *state; /* if active cache msg */
327 struct hammer2_dev *hmp;
328 struct hammer2_pfs *pmp; /* A PFS or super-root (spmp) */
330 hammer2_xid_t flush_xid; /* flush sequencing */
331 hammer2_key_t data_count; /* delta's to apply */
332 hammer2_key_t inode_count; /* delta's to apply */
333 hammer2_key_t data_count_up; /* delta's to apply */
334 hammer2_key_t inode_count_up; /* delta's to apply */
335 hammer2_io_t *dio; /* physical data buffer */
336 u_int bytes; /* physical data size */
340 hammer2_media_data_t *data; /* data pointer shortcut */
341 TAILQ_ENTRY(hammer2_chain) flush_node; /* flush list */
344 typedef struct hammer2_chain hammer2_chain_t;
346 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2);
347 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp);
350 * Special notes on flags:
352 * INITIAL - This flag allows a chain to be created and for storage to
353 * be allocated without having to immediately instantiate the
354 * related buffer. The data is assumed to be all-zeros. It
355 * is primarily used for indirect blocks.
357 * MODIFIED- The chain's media data has been modified.
358 * UPDATE - Chain might not be modified but parent blocktable needs update
360 * BMAPPED - Indicates that the chain is present in the parent blockmap.
361 * BMAPUPD - Indicates that the chain is present but needs to be updated
362 * in the parent blockmap.
364 #define HAMMER2_CHAIN_MODIFIED 0x00000001 /* dirty chain data */
365 #define HAMMER2_CHAIN_ALLOCATED 0x00000002 /* kmalloc'd chain */
366 #define HAMMER2_CHAIN_DESTROY 0x00000004
367 #define HAMMER2_CHAIN_UNLINKED 0x00000008 /* unlinked file */
368 #define HAMMER2_CHAIN_DELETED 0x00000010 /* deleted chain */
369 #define HAMMER2_CHAIN_INITIAL 0x00000020 /* initial create */
370 #define HAMMER2_CHAIN_UPDATE 0x00000040 /* need parent update */
371 #define HAMMER2_CHAIN_DEFERRED 0x00000080 /* flush depth defer */
372 #define HAMMER2_CHAIN_IOFLUSH 0x00000100 /* bawrite on put */
373 #define HAMMER2_CHAIN_ONFLUSH 0x00000200 /* on a flush list */
374 #define HAMMER2_CHAIN_UNUSED00000400 0x00000400
375 #define HAMMER2_CHAIN_VOLUMESYNC 0x00000800 /* needs volume sync */
376 #define HAMMER2_CHAIN_UNUSED00001000 0x00001000
377 #define HAMMER2_CHAIN_UNUSED00002000 0x00002000
378 #define HAMMER2_CHAIN_ONRBTREE 0x00004000 /* on parent RB tree */
379 #define HAMMER2_CHAIN_SNAPSHOT 0x00008000 /* snapshot special */
380 #define HAMMER2_CHAIN_EMBEDDED 0x00010000 /* embedded data */
381 #define HAMMER2_CHAIN_RELEASE 0x00020000 /* don't keep around */
382 #define HAMMER2_CHAIN_BMAPPED 0x00040000 /* present in blkmap */
383 #define HAMMER2_CHAIN_BMAPUPD 0x00080000 /* +needs updating */
384 #define HAMMER2_CHAIN_UNUSED00100000 0x00100000
385 #define HAMMER2_CHAIN_UNUSED00200000 0x00200000
386 #define HAMMER2_CHAIN_PFSBOUNDARY 0x00400000 /* super->pfs inode */
388 #define HAMMER2_CHAIN_FLUSH_MASK (HAMMER2_CHAIN_MODIFIED | \
389 HAMMER2_CHAIN_UPDATE | \
390 HAMMER2_CHAIN_ONFLUSH)
393 * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
395 * NOTE: MATCHIND allows an indirect block / freemap node to be returned
396 * when the passed key range matches the radix. Remember that key_end
397 * is inclusive (e.g. {0x000,0xFFF}, not {0x000,0x1000}).
399 #define HAMMER2_LOOKUP_NOLOCK 0x00000001 /* ref only */
400 #define HAMMER2_LOOKUP_NODATA 0x00000002 /* data left NULL */
401 #define HAMMER2_LOOKUP_SHARED 0x00000100
402 #define HAMMER2_LOOKUP_MATCHIND 0x00000200 /* return all chains */
403 #define HAMMER2_LOOKUP_UNUSED0400 0x00000400
404 #define HAMMER2_LOOKUP_ALWAYS 0x00000800 /* resolve data */
407 * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
409 * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
410 * blocks in the INITIAL-create state.
412 #define HAMMER2_MODIFY_OPTDATA 0x00000002 /* data can be NULL */
413 #define HAMMER2_MODIFY_NO_MODIFY_TID 0x00000004
414 #define HAMMER2_MODIFY_UNUSED0008 0x00000008
415 #define HAMMER2_MODIFY_NOREALLOC 0x00000010
418 * Flags passed to hammer2_chain_lock()
420 #define HAMMER2_RESOLVE_NEVER 1
421 #define HAMMER2_RESOLVE_MAYBE 2
422 #define HAMMER2_RESOLVE_ALWAYS 3
423 #define HAMMER2_RESOLVE_MASK 0x0F
425 #define HAMMER2_RESOLVE_SHARED 0x10 /* request shared lock */
426 #define HAMMER2_RESOLVE_NOREF 0x20 /* already ref'd on lock */
429 * Flags passed to hammer2_chain_delete()
431 #define HAMMER2_DELETE_PERMANENT 0x0001
432 #define HAMMER2_DELETE_NOSTATS 0x0002
434 #define HAMMER2_INSERT_NOSTATS 0x0002
435 #define HAMMER2_INSERT_PFSROOT 0x0004
438 * Flags passed to hammer2_chain_delete_duplicate()
440 #define HAMMER2_DELDUP_RECORE 0x0001
443 * Cluster different types of storage together for allocations
445 #define HAMMER2_FREECACHE_INODE 0
446 #define HAMMER2_FREECACHE_INDIR 1
447 #define HAMMER2_FREECACHE_DATA 2
448 #define HAMMER2_FREECACHE_UNUSED3 3
449 #define HAMMER2_FREECACHE_TYPES 4
452 * hammer2_freemap_alloc() block preference
454 #define HAMMER2_OFF_NOPREF ((hammer2_off_t)-1)
457 * BMAP read-ahead maximum parameters
459 #define HAMMER2_BMAP_COUNT 16 /* max bmap read-ahead */
460 #define HAMMER2_BMAP_BYTES (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
463 * hammer2_freemap_adjust()
465 #define HAMMER2_FREEMAP_DORECOVER 1
466 #define HAMMER2_FREEMAP_DOMAYFREE 2
467 #define HAMMER2_FREEMAP_DOREALFREE 3
470 * HAMMER2 cluster - A set of chains representing the same entity.
472 * hammer2_cluster typically represents a temporary set of representitive
473 * chains. The one exception is that a hammer2_cluster is embedded in
474 * hammer2_inode. This embedded cluster is ONLY used to track the
475 * representitive chains and cannot be directly locked.
477 * A cluster is usually temporary (and thus per-thread) for locking purposes,
478 * allowing us to embed the asynchronous storage required for cluster
479 * operations in the cluster itself and adjust the state and status without
480 * having to worry too much about SMP issues.
482 * The exception is the cluster embedded in the hammer2_inode structure.
483 * This is used to cache the cluster state on an inode-by-inode basis.
484 * Individual hammer2_chain structures not incorporated into clusters might
485 * also stick around to cache miscellanious elements.
487 * Because the cluster is a 'working copy' and is usually subject to cluster
488 * quorum rules, it is quite possible for us to end up with an insufficient
489 * number of live chains to execute an operation. If an insufficient number
490 * of chains remain in a working copy, the operation may have to be
491 * downgraded, retried, stall until the requisit number of chains are
492 * available, or possibly even error out depending on the mount type.
494 #define HAMMER2_MAXCLUSTER 8
496 struct hammer2_cluster_item {
497 hammer2_mtx_link_t async_link;
498 hammer2_chain_t *chain;
499 struct hammer2_cluster *cluster; /* link back to cluster */
504 typedef struct hammer2_cluster_item hammer2_cluster_item_t;
506 struct hammer2_cluster {
508 int refs; /* track for deallocation */
509 struct hammer2_pfs *pmp;
513 hammer2_chain_t *focus; /* current focus (or mod) */
514 hammer2_cluster_item_t array[HAMMER2_MAXCLUSTER];
517 typedef struct hammer2_cluster hammer2_cluster_t;
520 * WRHARD - Hard mounts can write fully synchronized
521 * RDHARD - Hard mounts can read fully synchronized
522 * WRSOFT - Soft mounts can write to at least the SOFT_MASTER
523 * RDSOFT - Soft mounts can read from at least a SOFT_SLAVE
524 * RDSLAVE - slaves are accessible (possibly unsynchronized or remote).
525 * MSYNCED - All masters are fully synchronized
526 * SSYNCED - All known local slaves are fully synchronized to masters
528 * All available masters are always incorporated. All PFSs belonging to a
529 * cluster (master, slave, copy, whatever) always try to synchronize the
530 * total number of known masters in the PFSs root inode.
532 * A cluster might have access to many slaves, copies, or caches, but we
533 * have a limited number of cluster slots. Any such elements which are
534 * directly mounted from block device(s) will always be incorporated. Note
535 * that SSYNCED only applies to such elements which are directly mounted,
536 * not to any remote slaves, copies, or caches that could be available. These
537 * bits are used to monitor and drive our synchronization threads.
539 * When asking the question 'is any data accessible at all', then a simple
540 * test against (RDHARD|RDSOFT|RDSLAVE) gives you the answer. If any of
541 * these bits are set the object can be read with certain caveats:
542 * RDHARD - no caveats. RDSOFT - authoritative but might not be synchronized.
543 * and RDSLAVE - not authoritative, has some data but it could be old or
546 * When both soft and hard mounts are available, data will be read and written
547 * via the soft mount only. But all might be in the cluster because
548 * background synchronization threads still need to do their work.
550 #define HAMMER2_CLUSTER_INODE 0x00000001 /* embedded in inode */
551 #define HAMMER2_CLUSTER_NOSYNC 0x00000002 /* not in sync (cumulative) */
552 #define HAMMER2_CLUSTER_WRHARD 0x00000100 /* hard-mount can write */
553 #define HAMMER2_CLUSTER_RDHARD 0x00000200 /* hard-mount can read */
554 #define HAMMER2_CLUSTER_WRSOFT 0x00000400 /* soft-mount can write */
555 #define HAMMER2_CLUSTER_RDSOFT 0x00000800 /* soft-mount can read */
556 #define HAMMER2_CLUSTER_MSYNCED 0x00001000 /* all masters synchronized */
557 #define HAMMER2_CLUSTER_SSYNCED 0x00002000 /* known slaves synchronized */
559 #define HAMMER2_CLUSTER_ANYDATA ( HAMMER2_CLUSTER_RDHARD | \
560 HAMMER2_CLUSTER_RDSOFT | \
561 HAMMER2_CLUSTER_RDSLAVE)
563 #define HAMMER2_CLUSTER_RDOK ( HAMMER2_CLUSTER_RDHARD | \
564 HAMMER2_CLUSTER_RDSOFT)
566 #define HAMMER2_CLUSTER_WROK ( HAMMER2_CLUSTER_WRHARD | \
567 HAMMER2_CLUSTER_WRSOFT)
570 RB_HEAD(hammer2_inode_tree, hammer2_inode);
575 * NOTE: The inode-embedded cluster is never used directly for I/O (since
576 * it may be shared). Instead it will be replicated-in and synchronized
577 * back out if changed.
579 struct hammer2_inode {
580 RB_ENTRY(hammer2_inode) rbnode; /* inumber lookup (HL) */
581 hammer2_mtx_t lock; /* inode lock */
582 struct hammer2_pfs *pmp; /* PFS mount */
583 struct hammer2_inode *pip; /* parent inode */
585 hammer2_cluster_t cluster;
586 struct lockf advlock;
589 u_int refs; /* +vpref, +flushref */
590 uint8_t comp_heuristic;
595 typedef struct hammer2_inode hammer2_inode_t;
597 #define HAMMER2_INODE_MODIFIED 0x0001
598 #define HAMMER2_INODE_SROOT 0x0002 /* kmalloc special case */
599 #define HAMMER2_INODE_RENAME_INPROG 0x0004
600 #define HAMMER2_INODE_ONRBTREE 0x0008
601 #define HAMMER2_INODE_RESIZED 0x0010
602 #define HAMMER2_INODE_MTIME 0x0020
604 int hammer2_inode_cmp(hammer2_inode_t *ip1, hammer2_inode_t *ip2);
605 RB_PROTOTYPE2(hammer2_inode_tree, hammer2_inode, rbnode, hammer2_inode_cmp,
609 * inode-unlink side-structure
611 struct hammer2_inode_unlink {
612 TAILQ_ENTRY(hammer2_inode_unlink) entry;
615 TAILQ_HEAD(h2_unlk_list, hammer2_inode_unlink);
617 typedef struct hammer2_inode_unlink hammer2_inode_unlink_t;
620 * Cluster node synchronization thread element.
622 * Multiple syncthr's can hang off of a hammer2_pfs structure, typically one
623 * for each block device that is part of the PFS. Synchronization threads
624 * for PFSs accessed over the network are handled by their respective hosts.
626 * Synchronization threads are responsible for keeping a local node
627 * synchronized to the greater cluster.
629 * A syncthr can also hang off each hammer2_dev's super-root PFS (spmp).
630 * This thread is responsible for automatic bulkfree and dedup scans.
632 struct hammer2_syncthr {
633 struct hammer2_pfs *pmp;
641 typedef struct hammer2_syncthr hammer2_syncthr_t;
643 #define HAMMER2_SYNCTHR_UNMOUNTING 0x0001 /* unmount request */
644 #define HAMMER2_SYNCTHR_DEV 0x0002 /* related to dev, not pfs */
645 #define HAMMER2_SYNCTHR_SPANNED 0x0004 /* LNK_SPAN active */
646 #define HAMMER2_SYNCTHR_REMASTER 0x0008 /* remaster request */
647 #define HAMMER2_SYNCTHR_STOP 0x0010 /* exit request */
648 #define HAMMER2_SYNCTHR_FREEZE 0x0020 /* force idle */
649 #define HAMMER2_SYNCTHR_FROZEN 0x0040 /* restart */
652 * A hammer2 transaction and flush sequencing structure.
654 * This global structure is tied into hammer2_dev and is used
655 * to sequence modifying operations and flushes.
657 * (a) Any modifying operations with sync_tid >= flush_tid will stall until
658 * all modifying operating with sync_tid < flush_tid complete.
660 * The flush related to flush_tid stalls until all modifying operations
661 * with sync_tid < flush_tid complete.
663 * (b) Once unstalled, modifying operations with sync_tid > flush_tid are
664 * allowed to run. All modifications cause modify/duplicate operations
665 * to occur on the related chains. Note that most INDIRECT blocks will
666 * be unaffected because the modifications just overload the RBTREE
667 * structurally instead of actually modifying the indirect blocks.
669 * (c) The actual flush unstalls and RUNS CONCURRENTLY with (b), but only
670 * utilizes the chain structures with sync_tid <= flush_tid. The
671 * flush will modify related indirect blocks and inodes in-place
672 * (rather than duplicate) since the adjustments are compatible with
673 * (b)'s RBTREE overloading
675 * SPECIAL NOTE: Inode modifications have to also propagate along any
676 * modify/duplicate chains. File writes detect the flush
677 * and force out the conflicting buffer cache buffer(s)
678 * before reusing them.
680 * (d) Snapshots can be made instantly but must be flushed and disconnected
681 * from their duplicative source before they can be mounted. This is
682 * because while H2's on-media structure supports forks, its in-memory
683 * structure only supports very simple forking for background flushing
686 * TODO: Flush merging. When fsync() is called on multiple discrete files
687 * concurrently there is no reason to stall the second fsync.
688 * The final flush that reaches to root can cover both fsync()s.
690 * The chains typically terminate as they fly onto the disk. The flush
691 * ultimately reaches the volume header.
693 struct hammer2_trans {
694 TAILQ_ENTRY(hammer2_trans) entry;
695 struct hammer2_pfs *pmp;
696 hammer2_xid_t sync_xid;
697 hammer2_tid_t inode_tid; /* inode number assignment */
698 thread_t td; /* pointer */
701 uint8_t inodes_created;
705 typedef struct hammer2_trans hammer2_trans_t;
707 #define HAMMER2_TRANS_ISFLUSH 0x0001 /* formal flush */
708 #define HAMMER2_TRANS_CONCURRENT 0x0002 /* concurrent w/flush */
709 #define HAMMER2_TRANS_BUFCACHE 0x0004 /* from bioq strategy write */
710 #define HAMMER2_TRANS_NEWINODE 0x0008 /* caller allocating inode */
711 #define HAMMER2_TRANS_UNUSED0010 0x0010
712 #define HAMMER2_TRANS_PREFLUSH 0x0020 /* preflush state */
714 #define HAMMER2_FREEMAP_HEUR_NRADIX 4 /* pwr 2 PBUFRADIX-MINIORADIX */
715 #define HAMMER2_FREEMAP_HEUR_TYPES 8
716 #define HAMMER2_FREEMAP_HEUR (HAMMER2_FREEMAP_HEUR_NRADIX * \
717 HAMMER2_FREEMAP_HEUR_TYPES)
720 * Transaction Rendezvous
722 TAILQ_HEAD(hammer2_trans_queue, hammer2_trans);
724 struct hammer2_trans_manage {
725 hammer2_xid_t flush_xid; /* last flush transaction */
726 hammer2_xid_t alloc_xid;
727 struct lock translk; /* lockmgr lock */
728 struct hammer2_trans_queue transq; /* modifying transactions */
729 int flushcnt; /* track flush trans */
732 typedef struct hammer2_trans_manage hammer2_trans_manage_t;
735 * Global (per partition) management structure, represents a hard block
736 * device. Typically referenced by hammer2_chain structures when applicable.
737 * Typically not used for network-managed elements.
739 * Note that a single hammer2_dev can be indirectly tied to multiple system
740 * mount points. There is no direct relationship. System mounts are
741 * per-cluster-id, not per-block-device, and a single hard mount might contain
742 * many PFSs and those PFSs might combine together in various ways to form
743 * the set of available clusters.
746 struct vnode *devvp; /* device vnode */
747 int ronly; /* read-only mount */
748 int pmp_count; /* number of actively mounted PFSs */
749 TAILQ_ENTRY(hammer2_dev) mntentry; /* hammer2_mntlist */
751 struct malloc_type *mchain;
754 kdmsg_iocom_t iocom; /* volume-level dmsg interface */
755 struct spinlock io_spin; /* iotree access */
756 struct hammer2_io_tree iotree;
758 hammer2_chain_t vchain; /* anchor chain (topology) */
759 hammer2_chain_t fchain; /* anchor chain (freemap) */
760 struct spinlock list_spin;
761 struct h2_flush_list flushq; /* flush seeds */
762 struct hammer2_pfs *spmp; /* super-root pmp for transactions */
763 struct lock vollk; /* lockmgr lock */
764 hammer2_off_t heur_freemap[HAMMER2_FREEMAP_HEUR];
765 int volhdrno; /* last volhdrno written */
766 hammer2_volume_data_t voldata;
767 hammer2_volume_data_t volsync; /* synchronized voldata */
770 typedef struct hammer2_dev hammer2_dev_t;
773 * Per-cluster management structure. This structure will be tied to a
774 * system mount point if the system is mounting the PFS, but is also used
775 * to manage clusters encountered during the super-root scan or received
776 * via LNK_SPANs that might not be mounted.
778 * This structure is also used to represent the super-root that hangs off
779 * of a hard mount point. The super-root is not really a cluster element.
780 * In this case the spmp_hmp field will be non-NULL. It's just easier to do
781 * this than to special case super-root manipulation in the hammer2_chain*
782 * code as being only hammer2_dev-related.
784 * pfs_mode and pfs_nmasters are rollup fields which critically describes
785 * how elements of the cluster act on the cluster. pfs_mode is only applicable
786 * when a PFS is mounted by the system. pfs_nmasters is our best guess as to
787 * how many masters have been configured for a cluster and is always
790 * WARNING! Portions of this structure have deferred initialization. In
791 * particular, if not mounted there will be no ihidden or wthread.
792 * umounted network PFSs will also be missing iroot and numerous
793 * other fields will not be initialized prior to mount.
795 * Synchronization threads are chain-specific and only applicable
796 * to local hard PFS entries. A hammer2_pfs structure may contain
797 * more than one when multiple hard PFSs are present on the local
798 * machine which require synchronization monitoring. Most PFSs
799 * (such as snapshots) are 1xMASTER PFSs which do not need a
800 * synchronization thread.
802 * WARNING! The chains making up pfs->iroot's cluster are accounted for in
803 * hammer2_dev->pmp_count when the pfs is associated with a mount
808 TAILQ_ENTRY(hammer2_pfs) mntentry; /* hammer2_pfslist */
810 hammer2_dev_t *spmp_hmp; /* only if super-root pmp */
811 hammer2_inode_t *iroot; /* PFS root inode */
812 hammer2_inode_t *ihidden; /* PFS hidden directory */
813 struct lock lock; /* PFS lock for certain ops */
814 hammer2_off_t inode_count; /* copy of inode_count */
815 struct netexport export; /* nfs export */
816 int ronly; /* read-only mount */
817 struct malloc_type *minode;
818 struct malloc_type *mmsg;
819 struct spinlock inum_spin; /* inumber lookup */
820 struct hammer2_inode_tree inum_tree; /* (not applicable to spmp) */
821 hammer2_tid_t alloc_tid;
822 hammer2_tid_t flush_tid;
823 hammer2_tid_t inode_tid;
824 uint8_t pfs_nmasters; /* total masters */
825 uint8_t pfs_mode; /* operating mode PFSMODE */
830 uint32_t inmem_dirty_chains;
831 int count_lwinprog; /* logical write in prog */
832 struct spinlock list_spin;
833 struct h2_unlk_list unlinkq; /* last-close unlink */
834 hammer2_syncthr_t primary_thr;
835 thread_t wthread_td; /* write thread td */
836 struct bio_queue_head wthread_bioq; /* logical buffer bioq */
837 hammer2_mtx_t wthread_mtx; /* interlock */
838 int wthread_destroy;/* termination sequencing */
841 typedef struct hammer2_pfs hammer2_pfs_t;
843 #define HAMMER2_DIRTYCHAIN_WAITING 0x80000000
844 #define HAMMER2_DIRTYCHAIN_MASK 0x7FFFFFFF
846 #define HAMMER2_LWINPROG_WAITING 0x80000000
847 #define HAMMER2_LWINPROG_MASK 0x7FFFFFFF
852 #define HAMMER2_BULK_ABORT 0x00000001
859 MALLOC_DECLARE(M_HAMMER2);
861 #define VTOI(vp) ((hammer2_inode_t *)(vp)->v_data)
862 #define ITOV(ip) ((ip)->vp)
865 * Currently locked chains retain the locked buffer cache buffer for
866 * indirect blocks, and indirect blocks can be one of two sizes. The
867 * device buffer has to match the case to avoid deadlocking recursive
868 * chains that might otherwise try to access different offsets within
869 * the same device buffer.
873 hammer2_devblkradix(int radix)
876 if (radix <= HAMMER2_LBUFRADIX) {
877 return (HAMMER2_LBUFRADIX);
879 return (HAMMER2_PBUFRADIX);
882 return (HAMMER2_PBUFRADIX);
886 * XXX almost time to remove this. DIO uses PBUFSIZE exclusively now.
890 hammer2_devblksize(size_t bytes)
893 if (bytes <= HAMMER2_LBUFSIZE) {
894 return(HAMMER2_LBUFSIZE);
896 KKASSERT(bytes <= HAMMER2_PBUFSIZE &&
897 (bytes ^ (bytes - 1)) == ((bytes << 1) - 1));
898 return (HAMMER2_PBUFSIZE);
901 return (HAMMER2_PBUFSIZE);
907 MPTOPMP(struct mount *mp)
909 return ((hammer2_pfs_t *)mp->mnt_data);
912 #define LOCKSTART int __nlocks = curthread->td_locks
913 #define LOCKENTER (++curthread->td_locks)
914 #define LOCKEXIT (--curthread->td_locks)
915 #define LOCKSTOP KKASSERT(curthread->td_locks == __nlocks)
917 extern struct vop_ops hammer2_vnode_vops;
918 extern struct vop_ops hammer2_spec_vops;
919 extern struct vop_ops hammer2_fifo_vops;
921 extern int hammer2_debug;
922 extern int hammer2_cluster_enable;
923 extern int hammer2_hardlink_enable;
924 extern int hammer2_flush_pipe;
925 extern int hammer2_synchronous_flush;
926 extern int hammer2_dio_count;
927 extern long hammer2_limit_dirty_chains;
928 extern long hammer2_iod_file_read;
929 extern long hammer2_iod_meta_read;
930 extern long hammer2_iod_indr_read;
931 extern long hammer2_iod_fmap_read;
932 extern long hammer2_iod_volu_read;
933 extern long hammer2_iod_file_write;
934 extern long hammer2_iod_meta_write;
935 extern long hammer2_iod_indr_write;
936 extern long hammer2_iod_fmap_write;
937 extern long hammer2_iod_volu_write;
938 extern long hammer2_ioa_file_read;
939 extern long hammer2_ioa_meta_read;
940 extern long hammer2_ioa_indr_read;
941 extern long hammer2_ioa_fmap_read;
942 extern long hammer2_ioa_volu_read;
943 extern long hammer2_ioa_file_write;
944 extern long hammer2_ioa_meta_write;
945 extern long hammer2_ioa_indr_write;
946 extern long hammer2_ioa_fmap_write;
947 extern long hammer2_ioa_volu_write;
949 extern struct objcache *cache_buffer_read;
950 extern struct objcache *cache_buffer_write;
953 extern int write_thread_wakeup;
958 #define hammer2_icrc32(buf, size) iscsi_crc32((buf), (size))
959 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc))
961 int hammer2_signal_check(time_t *timep);
962 hammer2_cluster_t *hammer2_inode_lock_ex(hammer2_inode_t *ip);
963 hammer2_cluster_t *hammer2_inode_lock_nex(hammer2_inode_t *ip, int how);
964 hammer2_cluster_t *hammer2_inode_lock_sh(hammer2_inode_t *ip);
965 void hammer2_inode_unlock_ex(hammer2_inode_t *ip, hammer2_cluster_t *chain);
966 void hammer2_inode_unlock_sh(hammer2_inode_t *ip, hammer2_cluster_t *chain);
967 hammer2_mtx_state_t hammer2_inode_lock_temp_release(hammer2_inode_t *ip);
968 void hammer2_inode_lock_temp_restore(hammer2_inode_t *ip,
969 hammer2_mtx_state_t ostate);
970 int hammer2_inode_lock_upgrade(hammer2_inode_t *ip);
971 void hammer2_inode_lock_downgrade(hammer2_inode_t *ip, int);
973 void hammer2_dev_exlock(hammer2_dev_t *hmp);
974 void hammer2_dev_shlock(hammer2_dev_t *hmp);
975 void hammer2_dev_unlock(hammer2_dev_t *hmp);
977 int hammer2_get_dtype(const hammer2_inode_data_t *ipdata);
978 int hammer2_get_vtype(const hammer2_inode_data_t *ipdata);
979 u_int8_t hammer2_get_obj_type(enum vtype vtype);
980 void hammer2_time_to_timespec(u_int64_t xtime, struct timespec *ts);
981 u_int64_t hammer2_timespec_to_time(const struct timespec *ts);
982 u_int32_t hammer2_to_unix_xid(const uuid_t *uuid);
983 void hammer2_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
984 hammer2_xid_t hammer2_trans_newxid(hammer2_pfs_t *pmp);
985 void hammer2_trans_manage_init(void);
987 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len);
988 int hammer2_getradix(size_t bytes);
990 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
991 hammer2_key_t *lbasep, hammer2_key_t *leofp);
992 int hammer2_calc_physical(hammer2_inode_t *ip,
993 const hammer2_inode_data_t *ipdata,
994 hammer2_key_t lbase);
995 void hammer2_update_time(uint64_t *timep);
996 void hammer2_adjreadcounter(hammer2_blockref_t *bref, size_t bytes);
1001 struct vnode *hammer2_igetv(hammer2_inode_t *ip, hammer2_cluster_t *cparent,
1003 void hammer2_inode_lock_nlinks(hammer2_inode_t *ip);
1004 void hammer2_inode_unlock_nlinks(hammer2_inode_t *ip);
1005 hammer2_inode_t *hammer2_inode_lookup(hammer2_pfs_t *pmp,
1006 hammer2_tid_t inum);
1007 hammer2_inode_t *hammer2_inode_get(hammer2_pfs_t *pmp,
1008 hammer2_inode_t *dip, hammer2_cluster_t *cluster);
1009 void hammer2_inode_free(hammer2_inode_t *ip);
1010 void hammer2_inode_ref(hammer2_inode_t *ip);
1011 void hammer2_inode_drop(hammer2_inode_t *ip);
1012 void hammer2_inode_repoint(hammer2_inode_t *ip, hammer2_inode_t *pip,
1013 hammer2_cluster_t *cluster);
1014 void hammer2_run_unlinkq(hammer2_trans_t *trans, hammer2_pfs_t *pmp);
1016 hammer2_inode_t *hammer2_inode_create(hammer2_trans_t *trans,
1017 hammer2_inode_t *dip,
1018 struct vattr *vap, struct ucred *cred,
1019 const uint8_t *name, size_t name_len,
1020 hammer2_cluster_t **clusterp,
1021 int flags, int *errorp);
1022 int hammer2_inode_connect(hammer2_trans_t *trans,
1023 hammer2_cluster_t **clusterp, int hlink,
1024 hammer2_inode_t *dip, hammer2_cluster_t *dcluster,
1025 const uint8_t *name, size_t name_len,
1027 hammer2_inode_t *hammer2_inode_common_parent(hammer2_inode_t *fdip,
1028 hammer2_inode_t *tdip);
1029 void hammer2_inode_fsync(hammer2_trans_t *trans, hammer2_inode_t *ip,
1030 hammer2_cluster_t *cparent);
1031 int hammer2_unlink_file(hammer2_trans_t *trans, hammer2_inode_t *dip,
1032 const uint8_t *name, size_t name_len, int isdir,
1033 int *hlinkp, struct nchandle *nch, int nlinks);
1034 int hammer2_hardlink_consolidate(hammer2_trans_t *trans,
1035 hammer2_inode_t *ip, hammer2_cluster_t **clusterp,
1036 hammer2_inode_t *cdip, hammer2_cluster_t *cdcluster,
1038 int hammer2_hardlink_deconsolidate(hammer2_trans_t *trans, hammer2_inode_t *dip,
1039 hammer2_chain_t **chainp, hammer2_chain_t **ochainp);
1040 int hammer2_hardlink_find(hammer2_inode_t *dip, hammer2_cluster_t **cparentp,
1041 hammer2_cluster_t *cluster);
1042 int hammer2_parent_find(hammer2_cluster_t **cparentp,
1043 hammer2_cluster_t *cluster);
1044 void hammer2_inode_install_hidden(hammer2_pfs_t *pmp);
1049 void hammer2_voldata_lock(hammer2_dev_t *hmp);
1050 void hammer2_voldata_unlock(hammer2_dev_t *hmp);
1051 void hammer2_voldata_modify(hammer2_dev_t *hmp);
1052 hammer2_chain_t *hammer2_chain_alloc(hammer2_dev_t *hmp,
1054 hammer2_trans_t *trans,
1055 hammer2_blockref_t *bref);
1056 void hammer2_chain_core_alloc(hammer2_trans_t *trans, hammer2_chain_t *chain);
1057 void hammer2_chain_ref(hammer2_chain_t *chain);
1058 void hammer2_chain_drop(hammer2_chain_t *chain);
1059 int hammer2_chain_lock(hammer2_chain_t *chain, int how);
1060 const hammer2_media_data_t *hammer2_chain_rdata(hammer2_chain_t *chain);
1061 hammer2_media_data_t *hammer2_chain_wdata(hammer2_chain_t *chain);
1066 int hammer2_cluster_isunlinked(hammer2_cluster_t *cluster);
1067 void hammer2_cluster_load_async(hammer2_cluster_t *cluster,
1068 void (*callback)(hammer2_iocb_t *iocb),
1070 void hammer2_chain_moved(hammer2_chain_t *chain);
1071 void hammer2_chain_modify(hammer2_trans_t *trans,
1072 hammer2_chain_t *chain, int flags);
1073 void hammer2_chain_resize(hammer2_trans_t *trans, hammer2_inode_t *ip,
1074 hammer2_chain_t *parent,
1075 hammer2_chain_t *chain,
1076 int nradix, int flags);
1077 void hammer2_chain_unlock(hammer2_chain_t *chain);
1078 void hammer2_chain_wait(hammer2_chain_t *chain);
1079 hammer2_chain_t *hammer2_chain_get(hammer2_chain_t *parent, int generation,
1080 hammer2_blockref_t *bref);
1081 hammer2_chain_t *hammer2_chain_lookup_init(hammer2_chain_t *parent, int flags);
1082 void hammer2_chain_lookup_done(hammer2_chain_t *parent);
1083 hammer2_chain_t *hammer2_chain_lookup(hammer2_chain_t **parentp,
1084 hammer2_key_t *key_nextp,
1085 hammer2_key_t key_beg, hammer2_key_t key_end,
1086 int *cache_indexp, int flags, int *ddflagp);
1087 hammer2_chain_t *hammer2_chain_next(hammer2_chain_t **parentp,
1088 hammer2_chain_t *chain,
1089 hammer2_key_t *key_nextp,
1090 hammer2_key_t key_beg, hammer2_key_t key_end,
1091 int *cache_indexp, int flags);
1092 hammer2_chain_t *hammer2_chain_scan(hammer2_chain_t *parent,
1093 hammer2_chain_t *chain,
1094 int *cache_indexp, int flags);
1096 int hammer2_chain_create(hammer2_trans_t *trans, hammer2_chain_t **parentp,
1097 hammer2_chain_t **chainp,
1099 hammer2_key_t key, int keybits,
1100 int type, size_t bytes, int flags);
1101 void hammer2_chain_rename(hammer2_trans_t *trans, hammer2_blockref_t *bref,
1102 hammer2_chain_t **parentp,
1103 hammer2_chain_t *chain, int flags);
1104 int hammer2_chain_snapshot(hammer2_trans_t *trans, hammer2_chain_t **chainp,
1105 hammer2_ioc_pfs_t *pfs);
1106 void hammer2_chain_delete(hammer2_trans_t *trans, hammer2_chain_t *parent,
1107 hammer2_chain_t *chain, int flags);
1108 void hammer2_chain_delete_duplicate(hammer2_trans_t *trans,
1109 hammer2_chain_t **chainp, int flags);
1110 void hammer2_flush(hammer2_trans_t *trans, hammer2_chain_t *chain);
1111 void hammer2_chain_commit(hammer2_trans_t *trans, hammer2_chain_t *chain);
1112 void hammer2_chain_setflush(hammer2_trans_t *trans, hammer2_chain_t *chain);
1113 void hammer2_chain_countbrefs(hammer2_chain_t *chain,
1114 hammer2_blockref_t *base, int count);
1116 void hammer2_chain_setcheck(hammer2_chain_t *chain, void *bdata);
1117 int hammer2_chain_testcheck(hammer2_chain_t *chain, void *bdata);
1120 void hammer2_pfs_memory_wait(hammer2_pfs_t *pmp);
1121 void hammer2_pfs_memory_inc(hammer2_pfs_t *pmp);
1122 void hammer2_pfs_memory_wakeup(hammer2_pfs_t *pmp);
1124 void hammer2_base_delete(hammer2_trans_t *trans, hammer2_chain_t *chain,
1125 hammer2_blockref_t *base, int count,
1126 int *cache_indexp, hammer2_chain_t *child);
1127 void hammer2_base_insert(hammer2_trans_t *trans, hammer2_chain_t *chain,
1128 hammer2_blockref_t *base, int count,
1129 int *cache_indexp, hammer2_chain_t *child);
1134 void hammer2_trans_init(hammer2_trans_t *trans, hammer2_pfs_t *pmp,
1136 void hammer2_trans_spmp(hammer2_trans_t *trans, hammer2_pfs_t *pmp);
1137 void hammer2_trans_done(hammer2_trans_t *trans);
1142 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
1143 int fflag, struct ucred *cred);
1148 void hammer2_io_putblk(hammer2_io_t **diop);
1149 void hammer2_io_cleanup(hammer2_dev_t *hmp, struct hammer2_io_tree *tree);
1150 char *hammer2_io_data(hammer2_io_t *dio, off_t lbase);
1151 void hammer2_io_getblk(hammer2_dev_t *hmp, off_t lbase, int lsize,
1152 hammer2_iocb_t *iocb);
1153 void hammer2_io_complete(hammer2_iocb_t *iocb);
1154 void hammer2_io_callback(struct bio *bio);
1155 void hammer2_iocb_wait(hammer2_iocb_t *iocb);
1156 int hammer2_io_new(hammer2_dev_t *hmp, off_t lbase, int lsize,
1157 hammer2_io_t **diop);
1158 int hammer2_io_newnz(hammer2_dev_t *hmp, off_t lbase, int lsize,
1159 hammer2_io_t **diop);
1160 int hammer2_io_newq(hammer2_dev_t *hmp, off_t lbase, int lsize,
1161 hammer2_io_t **diop);
1162 int hammer2_io_bread(hammer2_dev_t *hmp, off_t lbase, int lsize,
1163 hammer2_io_t **diop);
1164 void hammer2_io_bawrite(hammer2_io_t **diop);
1165 void hammer2_io_bdwrite(hammer2_io_t **diop);
1166 int hammer2_io_bwrite(hammer2_io_t **diop);
1167 int hammer2_io_isdirty(hammer2_io_t *dio);
1168 void hammer2_io_setdirty(hammer2_io_t *dio);
1169 void hammer2_io_setinval(hammer2_io_t *dio, u_int bytes);
1170 void hammer2_io_brelse(hammer2_io_t **diop);
1171 void hammer2_io_bqrelse(hammer2_io_t **diop);
1176 int hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg);
1177 int hammer2_msg_adhoc_input(kdmsg_msg_t *msg);
1182 void hammer2_clusterctl_wakeup(kdmsg_iocom_t *iocom);
1183 void hammer2_volconf_update(hammer2_dev_t *hmp, int index);
1184 void hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp, char pfx);
1185 void hammer2_bioq_sync(hammer2_pfs_t *pmp);
1186 int hammer2_vfs_sync(struct mount *mp, int waitflags);
1187 hammer2_pfs_t *hammer2_pfsalloc(hammer2_cluster_t *cluster,
1188 const hammer2_inode_data_t *ripdata,
1189 hammer2_tid_t alloc_tid);
1191 void hammer2_lwinprog_ref(hammer2_pfs_t *pmp);
1192 void hammer2_lwinprog_drop(hammer2_pfs_t *pmp);
1193 void hammer2_lwinprog_wait(hammer2_pfs_t *pmp);
1198 int hammer2_freemap_alloc(hammer2_trans_t *trans, hammer2_chain_t *chain,
1200 void hammer2_freemap_adjust(hammer2_trans_t *trans, hammer2_dev_t *hmp,
1201 hammer2_blockref_t *bref, int how);
1206 int hammer2_cluster_need_resize(hammer2_cluster_t *cluster, int bytes);
1207 uint8_t hammer2_cluster_type(hammer2_cluster_t *cluster);
1208 const hammer2_media_data_t *hammer2_cluster_rdata(hammer2_cluster_t *cluster);
1209 hammer2_media_data_t *hammer2_cluster_wdata(hammer2_cluster_t *cluster);
1210 hammer2_cluster_t *hammer2_cluster_from_chain(hammer2_chain_t *chain);
1211 int hammer2_cluster_modified(hammer2_cluster_t *cluster);
1212 int hammer2_cluster_duplicated(hammer2_cluster_t *cluster);
1213 void hammer2_cluster_set_chainflags(hammer2_cluster_t *cluster, uint32_t flags);
1214 void hammer2_cluster_clr_chainflags(hammer2_cluster_t *cluster, uint32_t flags);
1215 void hammer2_cluster_bref(hammer2_cluster_t *cluster, hammer2_blockref_t *bref);
1216 void hammer2_cluster_setflush(hammer2_trans_t *trans,
1217 hammer2_cluster_t *cluster);
1218 void hammer2_cluster_setmethod_check(hammer2_trans_t *trans,
1219 hammer2_cluster_t *cluster, int check_algo);
1220 hammer2_cluster_t *hammer2_cluster_alloc(hammer2_pfs_t *pmp,
1221 hammer2_trans_t *trans,
1222 hammer2_blockref_t *bref);
1223 void hammer2_cluster_ref(hammer2_cluster_t *cluster);
1224 void hammer2_cluster_drop(hammer2_cluster_t *cluster);
1225 void hammer2_cluster_wait(hammer2_cluster_t *cluster);
1226 int hammer2_cluster_lock(hammer2_cluster_t *cluster, int how);
1227 void hammer2_cluster_replace(hammer2_cluster_t *dst, hammer2_cluster_t *src);
1228 void hammer2_cluster_replace_locked(hammer2_cluster_t *dst,
1229 hammer2_cluster_t *src);
1230 hammer2_cluster_t *hammer2_cluster_copy(hammer2_cluster_t *ocluster);
1231 void hammer2_cluster_unlock(hammer2_cluster_t *cluster);
1232 void hammer2_cluster_resize(hammer2_trans_t *trans, hammer2_inode_t *ip,
1233 hammer2_cluster_t *cparent, hammer2_cluster_t *cluster,
1234 int nradix, int flags);
1235 hammer2_inode_data_t *hammer2_cluster_modify_ip(hammer2_trans_t *trans,
1236 hammer2_inode_t *ip, hammer2_cluster_t *cluster,
1238 void hammer2_cluster_modify(hammer2_trans_t *trans, hammer2_cluster_t *cluster,
1240 void hammer2_cluster_modsync(hammer2_cluster_t *cluster);
1241 hammer2_cluster_t *hammer2_cluster_lookup_init(hammer2_cluster_t *cparent,
1243 void hammer2_cluster_lookup_done(hammer2_cluster_t *cparent);
1244 hammer2_cluster_t *hammer2_cluster_lookup(hammer2_cluster_t *cparent,
1245 hammer2_key_t *key_nextp,
1246 hammer2_key_t key_beg, hammer2_key_t key_end,
1247 int flags, int *ddflagp);
1248 hammer2_cluster_t *hammer2_cluster_next(hammer2_cluster_t *cparent,
1249 hammer2_cluster_t *cluster,
1250 hammer2_key_t *key_nextp,
1251 hammer2_key_t key_beg, hammer2_key_t key_end,
1253 hammer2_cluster_t *hammer2_cluster_scan(hammer2_cluster_t *cparent,
1254 hammer2_cluster_t *cluster, int flags);
1255 int hammer2_cluster_create(hammer2_trans_t *trans, hammer2_cluster_t *cparent,
1256 hammer2_cluster_t **clusterp,
1257 hammer2_key_t key, int keybits,
1258 int type, size_t bytes, int flags);
1259 void hammer2_cluster_rename(hammer2_trans_t *trans, hammer2_blockref_t *bref,
1260 hammer2_cluster_t *cparent, hammer2_cluster_t *cluster,
1262 void hammer2_cluster_delete(hammer2_trans_t *trans, hammer2_cluster_t *pcluster,
1263 hammer2_cluster_t *cluster, int flags);
1264 int hammer2_cluster_snapshot(hammer2_trans_t *trans,
1265 hammer2_cluster_t *ocluster, hammer2_ioc_pfs_t *pfs);
1266 hammer2_cluster_t *hammer2_cluster_parent(hammer2_cluster_t *cluster);
1268 int hammer2_bulk_scan(hammer2_trans_t *trans, hammer2_chain_t *parent,
1269 int (*func)(hammer2_chain_t *chain, void *info),
1271 int hammer2_bulkfree_pass(hammer2_dev_t *hmp,
1272 struct hammer2_ioc_bulkfree *bfi);
1277 void hammer2_iocom_init(hammer2_dev_t *hmp);
1278 void hammer2_iocom_uninit(hammer2_dev_t *hmp);
1279 void hammer2_cluster_reconnect(hammer2_dev_t *hmp, struct file *fp);
1284 void hammer2_syncthr_create(hammer2_syncthr_t *thr, hammer2_pfs_t *pmp,
1285 void (*func)(void *arg));
1286 void hammer2_syncthr_delete(hammer2_syncthr_t *thr);
1287 void hammer2_syncthr_remaster(hammer2_syncthr_t *thr);
1288 void hammer2_syncthr_freeze(hammer2_syncthr_t *thr);
1289 void hammer2_syncthr_unfreeze(hammer2_syncthr_t *thr);
1290 void hammer2_syncthr_primary(void *arg);
1292 #endif /* !_KERNEL */
1293 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */