2 * Copyright (c) 2011-2013 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
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
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.
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
37 * This header file contains structures used internally by the HAMMER2
38 * implementation. See hammer2_disk.h for on-disk structures.
41 #ifndef _VFS_HAMMER2_HAMMER2_H_
42 #define _VFS_HAMMER2_HAMMER2_H_
44 #include <sys/param.h>
45 #include <sys/types.h>
46 #include <sys/kernel.h>
48 #include <sys/systm.h>
50 #include <sys/malloc.h>
51 #include <sys/mount.h>
52 #include <sys/vnode.h>
54 #include <sys/mountctl.h>
57 #include <sys/thread.h>
58 #include <sys/globaldata.h>
59 #include <sys/lockf.h>
61 #include <sys/queue.h>
62 #include <sys/limits.h>
64 #include <sys/signal2.h>
66 #include <sys/mutex.h>
67 #include <sys/mutex2.h>
69 #include "hammer2_disk.h"
70 #include "hammer2_mount.h"
71 #include "hammer2_ioctl.h"
72 #include "hammer2_ccms.h"
77 struct hammer2_pfsmount;
83 * The chain structure tracks a portion of the media topology from the
84 * root (volume) down. Chains represent volumes, inodes, indirect blocks,
85 * data blocks, and freemap nodes and leafs.
87 * The chain structure can be multi-homed and its topological recursion
88 * (chain->core) can be shared amongst several chains. Chain structures
89 * are topologically stable once placed in the in-memory topology (they
90 * don't move around). Modifications which cross flush synchronization
91 * boundaries, renames, resizing, or any move of the chain to elsewhere
92 * in the topology is accomplished via the DELETE-DUPLICATE mechanism.
94 * DELETE-DUPLICATE allows HAMMER2 to track work across flush synchronization
95 * points without stalling the filesystem or corrupting the flush
96 * sychronization point. When necessary a chain will be marked DELETED
97 * and a new, duplicate chain will be allocated.
99 * This mechanism necessarily requires that we be able to overload chains
100 * at any given layer in the topology. Overloading is accomplished via a
101 * RBTREE recursion through chain->rbtree.
105 * (1) Fully coherent snapshots can be taken without requiring
106 * a pre-flush, resulting in extremely fast (sub-millisecond)
109 * (2) Multiple synchronization points can be in-flight at the same
110 * time, representing multiple snapshots or flushes.
112 * (3) The algorithms needed to keep track of everything are actually
115 * Special Considerations:
117 * A chain is ref-counted on a per-chain basis, but the chain's lock
118 * is associated with the shared chain_core and is not per-chain.
120 * The power-of-2 nature of the media radix tree ensures that there
121 * will be no overlaps which straddle edges.
123 RB_HEAD(hammer2_chain_tree, hammer2_chain);
124 TAILQ_HEAD(h2_flush_deferral_list, hammer2_chain);
125 TAILQ_HEAD(h2_core_list, hammer2_chain);
126 TAILQ_HEAD(h2_layer_list, hammer2_chain_layer);
128 struct hammer2_chain_layer {
130 TAILQ_ENTRY(hammer2_chain_layer) entry;
131 struct hammer2_chain_tree rbtree;
132 int refs; /* prevent destruction */
135 typedef struct hammer2_chain_layer hammer2_chain_layer_t;
137 struct hammer2_chain_core {
140 struct h2_core_list ownerq; /* all chains sharing this core */
141 struct h2_layer_list layerq;
142 int live_zero; /* blockref array opt */
143 hammer2_tid_t update_lo; /* check update against parent */
144 hammer2_tid_t update_hi; /* check update against parent */
145 u_int chain_count; /* total chains in layers */
148 u_int live_count; /* live (not deleted) chains in tree */
149 int generation; /* generation number (inserts only) */
152 typedef struct hammer2_chain_core hammer2_chain_core_t;
154 #define HAMMER2_CORE_UNUSED0001 0x0001
155 #define HAMMER2_CORE_COUNTEDBREFS 0x0002
157 struct hammer2_chain {
158 RB_ENTRY(hammer2_chain) rbnode; /* node */
159 TAILQ_ENTRY(hammer2_chain) core_entry; /* contemporary chains */
160 hammer2_chain_layer_t *inlayer;
161 hammer2_blockref_t bref;
162 hammer2_chain_core_t *core;
163 hammer2_chain_core_t *above;
164 struct hammer2_state *state; /* if active cache msg */
165 struct hammer2_mount *hmp;
166 struct hammer2_pfsmount *pmp; /* can be NULL */
168 hammer2_tid_t modify_tid; /* snapshot/flush filter */
169 hammer2_tid_t delete_tid;
170 hammer2_key_t data_count; /* delta's to apply */
171 hammer2_key_t inode_count; /* delta's to apply */
172 struct buf *bp; /* physical data buffer */
173 u_int bytes; /* physical data size */
178 hammer2_media_data_t *data; /* data pointer shortcut */
179 TAILQ_ENTRY(hammer2_chain) flush_node; /* flush deferral list */
182 typedef struct hammer2_chain hammer2_chain_t;
184 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2);
185 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp);
188 * Special notes on flags:
190 * INITIAL - This flag allows a chain to be created and for storage to
191 * be allocated without having to immediately instantiate the
192 * related buffer. The data is assumed to be all-zeros. It
193 * is primarily used for indirect blocks.
195 * MOVED - A modified chain becomes MOVED after it flushes. A chain
196 * can also become MOVED if it is moved within the topology
197 * (even if not modified).
199 #define HAMMER2_CHAIN_MODIFIED 0x00000001 /* dirty chain data */
200 #define HAMMER2_CHAIN_ALLOCATED 0x00000002 /* kmalloc'd chain */
201 #define HAMMER2_CHAIN_DIRTYBP 0x00000004 /* dirty on unlock */
202 #define HAMMER2_CHAIN_FORCECOW 0x00000008 /* force copy-on-wr */
203 #define HAMMER2_CHAIN_DELETED 0x00000010 /* deleted chain */
204 #define HAMMER2_CHAIN_INITIAL 0x00000020 /* initial create */
205 #define HAMMER2_CHAIN_FLUSHED 0x00000040 /* flush on unlock */
206 #define HAMMER2_CHAIN_MOVED 0x00000080 /* bref changed */
207 #define HAMMER2_CHAIN_IOFLUSH 0x00000100 /* bawrite on put */
208 #define HAMMER2_CHAIN_DEFERRED 0x00000200 /* on a deferral list */
209 #define HAMMER2_CHAIN_DESTROYED 0x00000400 /* destroying inode */
210 #define HAMMER2_CHAIN_VOLUMESYNC 0x00000800 /* needs volume sync */
211 #define HAMMER2_CHAIN_UNUSED01000 0x00001000
212 #define HAMMER2_CHAIN_MOUNTED 0x00002000 /* PFS is mounted */
213 #define HAMMER2_CHAIN_ONRBTREE 0x00004000 /* on parent RB tree */
214 #define HAMMER2_CHAIN_SNAPSHOT 0x00008000 /* snapshot special */
215 #define HAMMER2_CHAIN_EMBEDDED 0x00010000 /* embedded data */
216 #define HAMMER2_CHAIN_UNUSED20000 0x00020000
217 #define HAMMER2_CHAIN_UNUSED40000 0x00040000
218 #define HAMMER2_CHAIN_UNUSED80000 0x00080000
219 #define HAMMER2_CHAIN_DUPLICATED 0x00100000 /* fwd delete-dup */
220 #define HAMMER2_CHAIN_PFSROOT 0x00200000 /* in pfs->cluster */
223 * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
225 * NOTE: MATCHIND allows an indirect block / freemap node to be returned
226 * when the passed key range matches the radix. Remember that key_end
227 * is inclusive (e.g. {0x000,0xFFF}, not {0x000,0x1000}).
229 #define HAMMER2_LOOKUP_NOLOCK 0x00000001 /* ref only */
230 #define HAMMER2_LOOKUP_NODATA 0x00000002 /* data left NULL */
231 #define HAMMER2_LOOKUP_SHARED 0x00000100
232 #define HAMMER2_LOOKUP_MATCHIND 0x00000200
233 #define HAMMER2_LOOKUP_FREEMAP 0x00000400 /* freemap base */
234 #define HAMMER2_LOOKUP_ALWAYS 0x00000800 /* resolve data */
237 * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
239 * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
240 * blocks in the INITIAL-create state.
242 #define HAMMER2_MODIFY_OPTDATA 0x00000002 /* data can be NULL */
243 #define HAMMER2_MODIFY_NO_MODIFY_TID 0x00000004
244 #define HAMMER2_MODIFY_ASSERTNOCOPY 0x00000008 /* assert no del-dup */
245 #define HAMMER2_MODIFY_NOREALLOC 0x00000010
246 #define HAMMER2_MODIFY_INPLACE 0x00000020 /* don't del-dup */
249 * Flags passed to hammer2_chain_lock()
251 #define HAMMER2_RESOLVE_NEVER 1
252 #define HAMMER2_RESOLVE_MAYBE 2
253 #define HAMMER2_RESOLVE_ALWAYS 3
254 #define HAMMER2_RESOLVE_MASK 0x0F
256 #define HAMMER2_RESOLVE_SHARED 0x10 /* request shared lock */
257 #define HAMMER2_RESOLVE_NOREF 0x20 /* already ref'd on lock */
260 * Flags passed to hammer2_chain_delete()
262 #define HAMMER2_DELETE_WILLDUP 0x0001 /* no blk free, will be dup */
265 * Flags passed to hammer2_chain_delete_duplicate()
267 #define HAMMER2_DELDUP_RECORE 0x0001
270 * Cluster different types of storage together for allocations
272 #define HAMMER2_FREECACHE_INODE 0
273 #define HAMMER2_FREECACHE_INDIR 1
274 #define HAMMER2_FREECACHE_DATA 2
275 #define HAMMER2_FREECACHE_UNUSED3 3
276 #define HAMMER2_FREECACHE_TYPES 4
279 * hammer2_freemap_alloc() block preference
281 #define HAMMER2_OFF_NOPREF ((hammer2_off_t)-1)
284 * BMAP read-ahead maximum parameters
286 #define HAMMER2_BMAP_COUNT 16 /* max bmap read-ahead */
287 #define HAMMER2_BMAP_BYTES (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
292 #define HAMMER2_FLUSH_DEPTH_LIMIT 10 /* stack recursion limit */
295 * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
297 * There is an in-memory representation of all on-media data structure.
298 * Basically everything is represented by a hammer2_chain structure
299 * in-memory and other higher-level structures map to chains.
301 * A great deal of data is accessed simply via its buffer cache buffer,
302 * which is mapped for the duration of the chain's lock. However, because
303 * chains may represent blocks smaller than the 16KB minimum we impose
304 * on buffer cache buffers, we cannot hold related buffer cache buffers
305 * locked for smaller blocks. In these situations we kmalloc() a copy
308 * When modifications are made to a chain a new filesystem block must be
309 * allocated. Multiple modifications do not necessarily allocate new
310 * blocks. However, when a flush occurs a flush synchronization point
311 * is created and any new modifications made after this point will allocate
312 * a new block even if the chain is already in a modified state.
314 * The in-memory representation may remain cached (for example in order to
315 * placemark clustering locks) even after the related data has been
320 * In order to support concurrent flushes a flush synchronization point
321 * is created represented by a transaction id. Among other things,
322 * operations may move filesystem objects from one part of the topology
323 * to another (for example, if you rename a file or when indirect blocks
324 * are created or destroyed, and a few other things). When this occurs
325 * across a flush synchronization point the flusher needs to be able to
326 * recurse down BOTH the 'before' version of the topology and the 'after'
329 * To facilitate this modifications to chains do what is called a
330 * DELETE-DUPLICATE operation. Chains are not actually moved in-memory.
331 * Instead the chain we wish to move is deleted and a new chain is created
332 * at the target location in the topology. ANY SUBCHAINS PLACED UNDER THE
333 * CHAIN BEING MOVED HAVE TO EXIST IN BOTH PLACES. To make this work
334 * all sub-chains are managed by the hammer2_chain_core structure. This
335 * structure can be multi-homed, meaning that it can have more than one
336 * chain as its parent. When a chain is delete-duplicated the chain's core
337 * becomes shared under both the old and new chain.
341 * When a chain is delete-duplicated the old chain typically becomes stale.
342 * This is detected via the HAMMER2_CHAIN_DUPLICATED flag in chain->flags.
343 * To avoid executing live filesystem operations on stale chains, the inode
344 * locking code will follow stale chains via core->ownerq until it finds
345 * the live chain. The lock prevents ripups by other threads. Lookups
346 * must properly order locking operations to prevent other threads from
347 * racing the lookup operation and will also follow stale chains when
351 RB_HEAD(hammer2_inode_tree, hammer2_inode);
356 * NOTE: The inode's attribute CST which is also used to lock the inode
357 * is embedded in the chain (chain.cst) and aliased w/ attr_cst.
359 struct hammer2_inode {
360 RB_ENTRY(hammer2_inode) rbnode; /* inumber lookup (HL) */
361 ccms_cst_t topo_cst; /* directory topology cst */
362 struct hammer2_pfsmount *pmp; /* PFS mount */
363 struct hammer2_inode *pip; /* parent inode */
365 hammer2_chain_t *chain; /* NOTE: rehomed on rename */
366 struct lockf advlock;
369 u_int refs; /* +vpref, +flushref */
370 uint8_t comp_heuristic;
375 typedef struct hammer2_inode hammer2_inode_t;
377 #define HAMMER2_INODE_MODIFIED 0x0001
378 #define HAMMER2_INODE_SROOT 0x0002 /* kmalloc special case */
379 #define HAMMER2_INODE_RENAME_INPROG 0x0004
380 #define HAMMER2_INODE_ONRBTREE 0x0008
381 #define HAMMER2_INODE_RESIZED 0x0010
382 #define HAMMER2_INODE_MTIME 0x0020
384 int hammer2_inode_cmp(hammer2_inode_t *ip1, hammer2_inode_t *ip2);
385 RB_PROTOTYPE2(hammer2_inode_tree, hammer2_inode, rbnode, hammer2_inode_cmp,
389 * A hammer2 transaction and flush sequencing structure.
391 * This global structure is tied into hammer2_mount and is used
392 * to sequence modifying operations and flushes.
394 * (a) Any modifying operations with sync_tid >= flush_tid will stall until
395 * all modifying operating with sync_tid < flush_tid complete.
397 * The flush related to flush_tid stalls until all modifying operations
398 * with sync_tid < flush_tid complete.
400 * (b) Once unstalled, modifying operations with sync_tid > flush_tid are
401 * allowed to run. All modifications cause modify/duplicate operations
402 * to occur on the related chains. Note that most INDIRECT blocks will
403 * be unaffected because the modifications just overload the RBTREE
404 * structurally instead of actually modifying the indirect blocks.
406 * (c) The actual flush unstalls and RUNS CONCURRENTLY with (b), but only
407 * utilizes the chain structures with sync_tid <= flush_tid. The
408 * flush will modify related indirect blocks and inodes in-place
409 * (rather than duplicate) since the adjustments are compatible with
410 * (b)'s RBTREE overloading
412 * SPECIAL NOTE: Inode modifications have to also propagate along any
413 * modify/duplicate chains. File writes detect the flush
414 * and force out the conflicting buffer cache buffer(s)
415 * before reusing them.
417 * (d) Snapshots can be made instantly but must be flushed and disconnected
418 * from their duplicative source before they can be mounted. This is
419 * because while H2's on-media structure supports forks, its in-memory
420 * structure only supports very simple forking for background flushing
423 * TODO: Flush merging. When fsync() is called on multiple discrete files
424 * concurrently there is no reason to stall the second fsync.
425 * The final flush that reaches to root can cover both fsync()s.
427 * The chains typically terminate as they fly onto the disk. The flush
428 * ultimately reaches the volume header.
430 struct hammer2_trans {
431 TAILQ_ENTRY(hammer2_trans) entry;
432 struct hammer2_pfsmount *pmp;
433 hammer2_tid_t real_tid;
434 hammer2_tid_t sync_tid;
435 hammer2_tid_t inode_tid;
436 thread_t td; /* pointer */
439 uint8_t inodes_created;
443 typedef struct hammer2_trans hammer2_trans_t;
445 #define HAMMER2_TRANS_ISFLUSH 0x0001 /* formal flush */
446 #define HAMMER2_TRANS_UNUSED0002 0x0002
447 #define HAMMER2_TRANS_BUFCACHE 0x0004 /* from bioq strategy write */
448 #define HAMMER2_TRANS_NEWINODE 0x0008 /* caller allocating inode */
449 #define HAMMER2_TRANS_ISALLOCATING 0x0010 /* in allocator */
451 #define HAMMER2_FREEMAP_HEUR_NRADIX 4 /* pwr 2 PBUFRADIX-MINIORADIX */
452 #define HAMMER2_FREEMAP_HEUR_TYPES 8
453 #define HAMMER2_FREEMAP_HEUR (HAMMER2_FREEMAP_HEUR_NRADIX * \
454 HAMMER2_FREEMAP_HEUR_TYPES)
457 * Global (per device) mount structure for device (aka vp->v_mount->hmp)
459 TAILQ_HEAD(hammer2_trans_queue, hammer2_trans);
461 struct hammer2_mount {
462 struct vnode *devvp; /* device vnode */
463 int ronly; /* read-only mount */
464 int pmp_count; /* PFS mounts backed by us */
465 TAILQ_ENTRY(hammer2_mount) mntentry; /* hammer2_mntlist */
467 struct malloc_type *mchain;
470 hammer2_chain_t vchain; /* anchor chain (topology) */
471 hammer2_chain_t fchain; /* anchor chain (freemap) */
472 hammer2_inode_t *sroot; /* super-root localized to media */
473 struct lock alloclk; /* lockmgr lock */
474 struct lock voldatalk; /* lockmgr lock */
475 struct hammer2_trans_queue transq; /* all in-progress transactions */
476 hammer2_off_t heur_freemap[HAMMER2_FREEMAP_HEUR];
477 int flushcnt; /* #of flush trans on the list */
479 int volhdrno; /* last volhdrno written */
480 hammer2_volume_data_t voldata;
481 hammer2_volume_data_t volsync; /* synchronized voldata */
484 typedef struct hammer2_mount hammer2_mount_t;
487 * HAMMER2 cluster - a device/root associated with a PFS.
489 * A PFS may have several hammer2_cluster's associated with it.
491 #define HAMMER2_MAXCLUSTER 8
493 struct hammer2_cluster {
496 hammer2_chain_t *chains[HAMMER2_MAXCLUSTER];
499 typedef struct hammer2_cluster hammer2_cluster_t;
502 * HAMMER2 PFS mount point structure (aka vp->v_mount->mnt_data).
503 * This has a 1:1 correspondence to struct mount (note that the
504 * hammer2_mount structure has a N:1 correspondence).
506 * This structure represents a cluster mount and not necessarily a
507 * PFS under a specific device mount (HMP). The distinction is important
508 * because the elements backing a cluster mount can change on the fly.
510 * Usually the first element under the cluster represents the original
511 * user-requested mount that bootstraps the whole mess. In significant
512 * setups the original is usually just a read-only media image (or
513 * representitive file) that simply contains a bootstrap volume header
514 * listing the configuration.
516 struct hammer2_pfsmount {
518 hammer2_cluster_t cluster;
519 hammer2_inode_t *iroot; /* PFS root inode */
520 hammer2_off_t inode_count; /* copy of inode_count */
521 ccms_domain_t ccms_dom;
522 struct netexport export; /* nfs export */
523 int ronly; /* read-only mount */
524 struct malloc_type *minode;
525 struct malloc_type *mmsg;
527 struct spinlock inum_spin; /* inumber lookup */
528 struct hammer2_inode_tree inum_tree;
532 thread_t wthread_td; /* write thread td */
533 struct bio_queue_head wthread_bioq; /* logical buffer bioq */
534 struct mtx wthread_mtx; /* interlock */
535 int wthread_destroy;/* termination sequencing */
538 typedef struct hammer2_pfsmount hammer2_pfsmount_t;
540 struct hammer2_cbinfo {
541 hammer2_chain_t *chain;
542 void (*func)(hammer2_chain_t *, struct buf *, char *, void *);
547 typedef struct hammer2_cbinfo hammer2_cbinfo_t;
551 MALLOC_DECLARE(M_HAMMER2);
553 #define VTOI(vp) ((hammer2_inode_t *)(vp)->v_data)
554 #define ITOV(ip) ((ip)->vp)
557 * Currently locked chains retain the locked buffer cache buffer for
558 * indirect blocks, and indirect blocks can be one of two sizes. The
559 * device buffer has to match the case to avoid deadlocking recursive
560 * chains that might otherwise try to access different offsets within
561 * the same device buffer.
565 hammer2_devblkradix(int radix)
568 if (radix <= HAMMER2_LBUFRADIX) {
569 return (HAMMER2_LBUFRADIX);
571 return (HAMMER2_PBUFRADIX);
574 return (HAMMER2_PBUFRADIX);
580 hammer2_devblksize(size_t bytes)
583 if (bytes <= HAMMER2_LBUFSIZE) {
584 return(HAMMER2_LBUFSIZE);
586 KKASSERT(bytes <= HAMMER2_PBUFSIZE &&
587 (bytes ^ (bytes - 1)) == ((bytes << 1) - 1));
588 return (HAMMER2_PBUFSIZE);
591 KKASSERT(bytes <= HAMMER2_PBUFSIZE &&
592 (bytes ^ (bytes - 1)) == ((bytes << 1) - 1));
593 return(HAMMER2_PBUFSIZE);
600 MPTOPMP(struct mount *mp)
602 return ((hammer2_pfsmount_t *)mp->mnt_data);
605 extern struct vop_ops hammer2_vnode_vops;
606 extern struct vop_ops hammer2_spec_vops;
607 extern struct vop_ops hammer2_fifo_vops;
609 extern int hammer2_debug;
610 extern int hammer2_cluster_enable;
611 extern int hammer2_hardlink_enable;
612 extern long hammer2_iod_file_read;
613 extern long hammer2_iod_meta_read;
614 extern long hammer2_iod_indr_read;
615 extern long hammer2_iod_fmap_read;
616 extern long hammer2_iod_volu_read;
617 extern long hammer2_iod_file_write;
618 extern long hammer2_iod_meta_write;
619 extern long hammer2_iod_indr_write;
620 extern long hammer2_iod_fmap_write;
621 extern long hammer2_iod_volu_write;
622 extern long hammer2_ioa_file_read;
623 extern long hammer2_ioa_meta_read;
624 extern long hammer2_ioa_indr_read;
625 extern long hammer2_ioa_fmap_read;
626 extern long hammer2_ioa_volu_read;
627 extern long hammer2_ioa_file_write;
628 extern long hammer2_ioa_meta_write;
629 extern long hammer2_ioa_indr_write;
630 extern long hammer2_ioa_fmap_write;
631 extern long hammer2_ioa_volu_write;
633 extern struct objcache *cache_buffer_read;
634 extern struct objcache *cache_buffer_write;
637 extern int write_thread_wakeup;
639 extern mtx_t thread_protect;
644 #define hammer2_icrc32(buf, size) iscsi_crc32((buf), (size))
645 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc))
647 hammer2_chain_t *hammer2_inode_lock_ex(hammer2_inode_t *ip);
648 hammer2_chain_t *hammer2_inode_lock_sh(hammer2_inode_t *ip);
649 void hammer2_inode_unlock_ex(hammer2_inode_t *ip, hammer2_chain_t *chain);
650 void hammer2_inode_unlock_sh(hammer2_inode_t *ip, hammer2_chain_t *chain);
651 void hammer2_chain_refactor(hammer2_chain_t **chainp);
652 void hammer2_voldata_lock(hammer2_mount_t *hmp);
653 void hammer2_voldata_unlock(hammer2_mount_t *hmp, int modify);
654 ccms_state_t hammer2_inode_lock_temp_release(hammer2_inode_t *ip);
655 void hammer2_inode_lock_temp_restore(hammer2_inode_t *ip, ccms_state_t ostate);
656 ccms_state_t hammer2_inode_lock_upgrade(hammer2_inode_t *ip);
657 void hammer2_inode_lock_downgrade(hammer2_inode_t *ip, ccms_state_t ostate);
659 void hammer2_mount_exlock(hammer2_mount_t *hmp);
660 void hammer2_mount_shlock(hammer2_mount_t *hmp);
661 void hammer2_mount_unlock(hammer2_mount_t *hmp);
663 int hammer2_get_dtype(hammer2_chain_t *chain);
664 int hammer2_get_vtype(hammer2_chain_t *chain);
665 u_int8_t hammer2_get_obj_type(enum vtype vtype);
666 void hammer2_time_to_timespec(u_int64_t xtime, struct timespec *ts);
667 u_int64_t hammer2_timespec_to_time(struct timespec *ts);
668 u_int32_t hammer2_to_unix_xid(uuid_t *uuid);
669 void hammer2_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
671 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len);
672 int hammer2_getradix(size_t bytes);
674 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
675 hammer2_key_t *lbasep, hammer2_key_t *leofp);
676 int hammer2_calc_physical(hammer2_inode_t *ip, hammer2_key_t lbase);
677 void hammer2_update_time(uint64_t *timep);
682 struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp);
684 void hammer2_inode_lock_nlinks(hammer2_inode_t *ip);
685 void hammer2_inode_unlock_nlinks(hammer2_inode_t *ip);
686 hammer2_inode_t *hammer2_inode_lookup(hammer2_pfsmount_t *pmp,
688 hammer2_inode_t *hammer2_inode_get(hammer2_pfsmount_t *pmp,
689 hammer2_inode_t *dip, hammer2_chain_t *chain);
690 void hammer2_inode_free(hammer2_inode_t *ip);
691 void hammer2_inode_ref(hammer2_inode_t *ip);
692 void hammer2_inode_drop(hammer2_inode_t *ip);
693 void hammer2_inode_repoint(hammer2_inode_t *ip, hammer2_inode_t *pip,
694 hammer2_chain_t *chain);
696 hammer2_inode_t *hammer2_inode_create(hammer2_trans_t *trans,
697 hammer2_inode_t *dip,
698 struct vattr *vap, struct ucred *cred,
699 const uint8_t *name, size_t name_len,
700 hammer2_chain_t **chainp, int *errorp);
701 int hammer2_inode_connect(hammer2_trans_t *trans, int hlink,
702 hammer2_inode_t *dip, hammer2_chain_t **chainp,
703 const uint8_t *name, size_t name_len);
704 hammer2_inode_t *hammer2_inode_common_parent(hammer2_inode_t *fdip,
705 hammer2_inode_t *tdip);
706 void hammer2_inode_fsync(hammer2_trans_t *trans, hammer2_inode_t *ip,
707 hammer2_chain_t **parentp);
708 int hammer2_unlink_file(hammer2_trans_t *trans, hammer2_inode_t *dip,
709 const uint8_t *name, size_t name_len, int isdir,
711 int hammer2_hardlink_consolidate(hammer2_trans_t *trans, hammer2_inode_t *ip,
712 hammer2_chain_t **chainp,
713 hammer2_inode_t *tdip, int linkcnt);
714 int hammer2_hardlink_deconsolidate(hammer2_trans_t *trans, hammer2_inode_t *dip,
715 hammer2_chain_t **chainp, hammer2_chain_t **ochainp);
716 int hammer2_hardlink_find(hammer2_inode_t *dip,
717 hammer2_chain_t **chainp, hammer2_chain_t **ochainp);
722 void hammer2_modify_volume(hammer2_mount_t *hmp);
723 hammer2_chain_t *hammer2_chain_alloc(hammer2_mount_t *hmp, hammer2_pfsmount_t *pmp,
724 hammer2_trans_t *trans, hammer2_blockref_t *bref);
725 void hammer2_chain_core_alloc(hammer2_trans_t *trans, hammer2_chain_t *nchain,
726 hammer2_chain_t *ochain);
727 void hammer2_chain_ref(hammer2_chain_t *chain);
728 void hammer2_chain_drop(hammer2_chain_t *chain);
729 int hammer2_chain_lock(hammer2_chain_t *chain, int how);
730 void hammer2_chain_load_async(hammer2_chain_t *chain,
731 void (*func)(hammer2_chain_t *, struct buf *,
734 void hammer2_chain_moved(hammer2_chain_t *chain);
735 void hammer2_chain_modify(hammer2_trans_t *trans,
736 hammer2_chain_t **chainp, int flags);
737 hammer2_inode_data_t *hammer2_chain_modify_ip(hammer2_trans_t *trans,
738 hammer2_inode_t *ip, hammer2_chain_t **chainp,
740 void hammer2_chain_resize(hammer2_trans_t *trans, hammer2_inode_t *ip,
741 hammer2_chain_t *parent,
742 hammer2_chain_t **chainp,
743 int nradix, int flags);
744 void hammer2_chain_unlock(hammer2_chain_t *chain);
745 void hammer2_chain_wait(hammer2_chain_t *chain);
746 hammer2_chain_t *hammer2_chain_get(hammer2_chain_t *parent,
747 hammer2_blockref_t *bref);
748 hammer2_chain_t *hammer2_chain_lookup_init(hammer2_chain_t *parent, int flags);
749 void hammer2_chain_lookup_done(hammer2_chain_t *parent);
750 hammer2_chain_t *hammer2_chain_lookup(hammer2_chain_t **parentp,
751 hammer2_key_t *key_nextp,
752 hammer2_key_t key_beg, hammer2_key_t key_end,
753 int *cache_indexp, int flags);
754 hammer2_chain_t *hammer2_chain_next(hammer2_chain_t **parentp,
755 hammer2_chain_t *chain,
756 hammer2_key_t *key_nextp,
757 hammer2_key_t key_beg, hammer2_key_t key_end,
758 int *cache_indexp, int flags);
760 int hammer2_chain_create(hammer2_trans_t *trans,
761 hammer2_chain_t **parentp,
762 hammer2_chain_t **chainp,
763 hammer2_key_t key, int keybits,
764 int type, size_t bytes);
765 void hammer2_chain_duplicate(hammer2_trans_t *trans, hammer2_chain_t **parentp,
766 hammer2_chain_t **chainp,
767 hammer2_blockref_t *bref, int snapshot);
768 int hammer2_chain_snapshot(hammer2_trans_t *trans, hammer2_chain_t **chainp,
769 hammer2_ioc_pfs_t *pfs);
770 void hammer2_chain_delete(hammer2_trans_t *trans, hammer2_chain_t *chain,
772 void hammer2_chain_delete_duplicate(hammer2_trans_t *trans,
773 hammer2_chain_t **chainp, int flags);
774 void hammer2_chain_flush(hammer2_trans_t *trans, hammer2_chain_t **chainp);
775 void hammer2_chain_commit(hammer2_trans_t *trans, hammer2_chain_t *chain);
776 void hammer2_chain_setsubmod(hammer2_trans_t *trans, hammer2_chain_t *chain);
778 void hammer2_chain_memory_wait(hammer2_pfsmount_t *pmp);
779 void hammer2_chain_memory_wakeup(hammer2_pfsmount_t *pmp);
780 void hammer2_chain_countbrefs(hammer2_chain_t *chain,
781 hammer2_blockref_t *base, int count);
782 void hammer2_chain_layer_check_locked(hammer2_mount_t *hmp,
783 hammer2_chain_core_t *core);
785 int hammer2_base_find(hammer2_chain_t *chain,
786 hammer2_blockref_t *base, int count,
787 int *cache_indexp, hammer2_key_t *key_nextp,
788 hammer2_key_t key_beg, hammer2_key_t key_end);
789 void hammer2_base_delete(hammer2_chain_t *chain,
790 hammer2_blockref_t *base, int count,
791 int *cache_indexp, hammer2_chain_t *child);
792 void hammer2_base_insert(hammer2_chain_t *chain,
793 hammer2_blockref_t *base, int count,
794 int *cache_indexp, hammer2_chain_t *child);
799 void hammer2_trans_init(hammer2_trans_t *trans,
800 hammer2_pfsmount_t *pmp, int flags);
801 void hammer2_trans_clear_invfsync(hammer2_trans_t *trans);
802 void hammer2_trans_done(hammer2_trans_t *trans);
807 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
808 int fflag, struct ucred *cred);
813 int hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg);
814 int hammer2_msg_adhoc_input(kdmsg_msg_t *msg);
819 void hammer2_clusterctl_wakeup(kdmsg_iocom_t *iocom);
820 void hammer2_volconf_update(hammer2_pfsmount_t *pmp, int index);
821 void hammer2_cluster_reconnect(hammer2_pfsmount_t *pmp, struct file *fp);
822 void hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp);
823 void hammer2_bioq_sync(hammer2_pfsmount_t *pmp);
824 int hammer2_vfs_sync(struct mount *mp, int waitflags);
829 int hammer2_freemap_alloc(hammer2_trans_t *trans, hammer2_mount_t *hmp,
830 hammer2_blockref_t *bref, size_t bytes);
831 void hammer2_freemap_free(hammer2_trans_t *trans, hammer2_mount_t *hmp,
832 hammer2_blockref_t *bref, int how);
835 #endif /* !_KERNEL */
836 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */