330558e1bb8c8ecb54a0280bdc87bb102a84c354
[dragonfly.git] / sys / vfs / hammer2 / hammer2.h
1 /*
2  * Copyright (c) 2011-2012 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  * This header file contains structures used internally by the HAMMER2
38  * implementation.  See hammer2_disk.h for on-disk structures.
39  */
40
41 #ifndef _VFS_HAMMER2_HAMMER2_H_
42 #define _VFS_HAMMER2_HAMMER2_H_
43
44 #include <sys/param.h>
45 #include <sys/types.h>
46 #include <sys/kernel.h>
47 #include <sys/conf.h>
48 #include <sys/systm.h>
49 #include <sys/tree.h>
50 #include <sys/malloc.h>
51 #include <sys/mount.h>
52 #include <sys/vnode.h>
53 #include <sys/proc.h>
54 #include <sys/mountctl.h>
55 #include <sys/priv.h>
56 #include <sys/stat.h>
57 #include <sys/thread.h>
58 #include <sys/globaldata.h>
59 #include <sys/lockf.h>
60 #include <sys/buf.h>
61 #include <sys/queue.h>
62 #include <sys/limits.h>
63 #include <sys/buf2.h>
64 #include <sys/signal2.h>
65 #include <sys/tree.h>
66
67 #include "hammer2_disk.h"
68 #include "hammer2_mount.h"
69 #include "hammer2_ioctl.h"
70 #include "hammer2_ccms.h"
71 #include "hammer2_network.h"
72
73 struct hammer2_chain;
74 struct hammer2_inode;
75 struct hammer2_mount;
76 struct hammer2_pfsmount;
77 struct hammer2_state;
78 struct hammer2_msg;
79
80 /*
81  * The chain structure tracks blockref recursions all the way to
82  * the root volume.  These consist of indirect blocks, inodes,
83  * and eventually the volume header.
84  *
85  * The chain structure is embedded in the hammer2_mount, hammer2_inode,
86  * and other system memory structures.  The chain structure typically
87  * implements the reference count and busy flag for the larger structure.
88  *
89  * It is always possible to track a chain element all the way back to the
90  * root by following the (parent) links.  (index) is a type-dependent index
91  * in the parent indicating where in the parent the chain element resides.
92  *
93  * When a blockref is added or deleted the related chain element is marked
94  * modified and all of its parents are marked SUBMODIFIED (the parent
95  * recursion can stop once we hit a node that is already marked SUBMODIFIED).
96  * A deleted chain element must remain intact until synchronized against
97  * its parent.
98  *
99  * The blockref at (parent, index) is not adjusted until the modified chain
100  * element is flushed and unmarked.  Until then the child's blockref may
101  * not match the blockref at (parent, index).
102  */
103 RB_HEAD(hammer2_chain_tree, hammer2_chain);
104 RB_HEAD(hammer2_state_tree, hammer2_state);
105 TAILQ_HEAD(flush_deferral_list, hammer2_chain);
106
107 struct hammer2_chain {
108         ccms_cst_t      cst;                    /* attr or data cst */
109         struct hammer2_blockref bref;
110         struct hammer2_blockref bref_flush;     /* synchronized w/MOVED bit */
111         struct hammer2_chain    *parent;        /* return chain to root */
112         struct hammer2_chain_tree rbhead;
113         struct hammer2_state    *state;         /* if active cache msg */
114         RB_ENTRY(hammer2_chain) rbnode;
115         TAILQ_ENTRY(hammer2_chain) flush_node;  /* flush deferral list */
116         union {
117                 struct hammer2_inode *ip;
118                 struct hammer2_indblock *np;
119                 struct hammer2_data *dp;
120                 void *mem;
121         } u;
122
123         struct buf      *bp;            /* buffer cache (ro) */
124         hammer2_media_data_t *data;     /* modified copy of data (rw) */
125         u_int           bytes;          /* physical size of data */
126         int             index;          /* index in parent */
127         u_int           refs;
128         u_int           flags;
129 };
130
131 typedef struct hammer2_chain hammer2_chain_t;
132
133 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2);
134 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp);
135
136 /*
137  * MOVED - This bit is set during the flush when the MODIFIED bit is cleared,
138  *         indicating that the parent's blocktable must inherit a change to
139  *         the bref (typically a block reallocation)
140  *
141  *         It must also be set in situations where a chain is not MODIFIED
142  *         but whos bref has changed (typically due to fields other than
143  *         a block reallocation).
144  */
145 #define HAMMER2_CHAIN_MODIFIED          0x00000001      /* active mods */
146 #define HAMMER2_CHAIN_DIRTYEMBED        0x00000002      /* inode embedded */
147 #define HAMMER2_CHAIN_DIRTYBP           0x00000004      /* dirty on unlock */
148 #define HAMMER2_CHAIN_SUBMODIFIED       0x00000008      /* 1+ subs modified */
149 #define HAMMER2_CHAIN_DELETED           0x00000010
150 #define HAMMER2_CHAIN_INITIAL           0x00000020      /* initial create */
151 #define HAMMER2_CHAIN_FLUSHED           0x00000040      /* flush on unlock */
152 #define HAMMER2_CHAIN_MOVED             0x00000080      /* bref changed */
153 #define HAMMER2_CHAIN_IOFLUSH           0x00000100      /* bawrite on put */
154 #define HAMMER2_CHAIN_DEFERRED          0x00000200      /* on a deferral list*/
155 #define HAMMER2_CHAIN_DESTROYED         0x00000400      /* destroying */
156 #define HAMMER2_CHAIN_MODIFIED_AUX      0x00000800      /* hmp->vchain only */
157 #define HAMMER2_CHAIN_MODIFY_TID        0x00001000      /* mod updates field */
158 #define HAMMER2_CHAIN_MOUNTED           0x00002000      /* PFS is mounted */
159
160 /*
161  * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
162  */
163 #define HAMMER2_LOOKUP_NOLOCK           0x00000001      /* ref only */
164 #define HAMMER2_LOOKUP_NODATA           0x00000002      /* data left NULL */
165 #define HAMMER2_LOOKUP_SHARED           0x00000100
166
167 /*
168  * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
169  *
170  * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
171  *       blocks in the INITIAL-create state.
172  *
173  * NOTE: NO_MODIFY_TID tells the function to not set HAMMER2_CHAIN_MODIFY_TID
174  *       when marking the chain modified (used when a sub-chain modification
175  *       propagates upward).
176  */
177 #define HAMMER2_MODIFY_NOSUB            0x00000001      /* do not set SUBMOD */
178 #define HAMMER2_MODIFY_OPTDATA          0x00000002      /* data can be NULL */
179 #define HAMMER2_MODIFY_NO_MODIFY_TID    0x00000004
180
181 /*
182  * Flags passed to hammer2_chain_lock()
183  */
184 #define HAMMER2_RESOLVE_NEVER           1
185 #define HAMMER2_RESOLVE_MAYBE           2
186 #define HAMMER2_RESOLVE_ALWAYS          3
187 #define HAMMER2_RESOLVE_MASK            0x0F
188
189 #define HAMMER2_RESOLVE_SHARED          0x10
190
191 /*
192  * Cluster different types of storage together for allocations
193  */
194 #define HAMMER2_FREECACHE_INODE         0
195 #define HAMMER2_FREECACHE_INDIR         1
196 #define HAMMER2_FREECACHE_DATA          2
197 #define HAMMER2_FREECACHE_UNUSED3       3
198 #define HAMMER2_FREECACHE_TYPES         4
199
200 /*
201  * BMAP read-ahead maximum parameters
202  */
203 #define HAMMER2_BMAP_COUNT              16      /* max bmap read-ahead */
204 #define HAMMER2_BMAP_BYTES              (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
205
206 /*
207  * Misc
208  */
209 #define HAMMER2_FLUSH_DEPTH_LIMIT       40      /* stack recursion limit */
210
211 /*
212  * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
213  *
214  * There is an in-memory representation of all on-media data structure.
215  *
216  * When accessed read-only the data will be mapped to the related buffer
217  * cache buffer.
218  *
219  * When accessed read-write (marked modified) a kmalloc()'d copy of the
220  * is created which can then be modified.  The copy is destroyed when a
221  * filesystem block is allocated to replace it.
222  *
223  * Active inodes (those with vnodes attached) will maintain the kmalloc()'d
224  * copy for both the read-only and the read-write case.  The combination of
225  * (bp) and (data) determines whether (data) was allocated or not.
226  *
227  * The in-memory representation may remain cached (for example in order to
228  * placemark clustering locks) even after the related data has been
229  * detached.
230  */
231
232 /*
233  * A hammer2 inode.
234  *
235  * NOTE: The inode's attribute CST which is also used to lock the inode
236  *       is embedded in the chain (chain.cst) and aliased w/ attr_cst.
237  */
238 struct hammer2_inode {
239         struct hammer2_mount    *hmp;           /* Global mount */
240         struct hammer2_pfsmount *pmp;           /* PFS mount */
241         struct hammer2_inode    *pip;           /* parent inode */
242         struct vnode            *vp;
243         ccms_cst_t              topo_cst;       /* directory topology cst */
244         hammer2_chain_t         chain;
245         struct hammer2_inode_data ip_data;
246         struct lockf            advlock;
247         u_int                   depth;          /* directory depth */
248         hammer2_off_t           delta_dcount;   /* adjust data_count */
249         hammer2_off_t           delta_icount;   /* adjust inode_count */
250 };
251
252 typedef struct hammer2_inode hammer2_inode_t;
253
254 /*
255  * A hammer2 indirect block
256  */
257 struct hammer2_indblock {
258         hammer2_chain_t         chain;
259 };
260
261 typedef struct hammer2_indblock hammer2_indblock_t;
262
263 /*
264  * A hammer2 data block
265  */
266 struct hammer2_data {
267         hammer2_chain_t         chain;
268 };
269
270 typedef struct hammer2_data hammer2_data_t;
271
272 struct hammer2_freecache {
273         hammer2_off_t   bulk;
274         hammer2_off_t   single;
275 };
276
277 typedef struct hammer2_freecache hammer2_freecache_t;
278
279 /*
280  * Global (per device) mount structure for device (aka vp->v_mount->hmp)
281  */
282 struct hammer2_mount {
283         struct vnode    *devvp;         /* device vnode */
284         int             ronly;          /* read-only mount */
285         int             pmp_count;      /* PFS mounts backed by us */
286         TAILQ_ENTRY(hammer2_mount) mntentry; /* hammer2_mntlist */
287
288         struct malloc_type *minode;
289         int             ninodes;
290         int             maxinodes;
291
292         struct malloc_type *mchain;
293         int             nipstacks;
294         int             maxipstacks;
295         hammer2_chain_t vchain;         /* anchor chain */
296         hammer2_chain_t *schain;        /* super-root */
297         struct lock     alloclk;        /* lockmgr lock */
298         struct lock     voldatalk;      /* lockmgr lock */
299
300         hammer2_volume_data_t voldata;
301         hammer2_freecache_t freecache[HAMMER2_FREECACHE_TYPES]
302                                      [HAMMER2_MAX_RADIX+1];
303 };
304
305 typedef struct hammer2_mount hammer2_mount_t;
306
307 /*
308  * Per-PFS mount structure for device (aka vp->v_mount)
309  */
310 struct hammer2_pfsmount {
311         struct mount            *mp;            /* kernel mount */
312         struct hammer2_mount    *hmp;           /* device global mount */
313         hammer2_chain_t         *rchain;        /* PFS root chain */
314         hammer2_inode_t         *iroot;         /* PFS root inode */
315         struct malloc_type      *mmsg;
316         ccms_domain_t           ccms_dom;
317         struct netexport        export;         /* nfs export */
318         int                     ronly;          /* read-only mount */
319         struct file             *msg_fp;        /* cluster pipe->userland */
320         thread_t                msgrd_td;       /* cluster thread */
321         thread_t                msgwr_td;       /* cluster thread */
322         int                     msg_ctl;        /* wakeup flags */
323         uint32_t                msgid_iterator;
324         struct lock             msglk;          /* lockmgr lock */
325         TAILQ_HEAD(, hammer2_msg) msgq;         /* transmit queue */
326         struct hammer2_state    *freerd_state;  /* allocation cache */
327         struct hammer2_state    *freewr_state;  /* allocation cache */
328         struct hammer2_state_tree staterd_tree; /* active messages */
329         struct hammer2_state_tree statewr_tree; /* active messages */
330 };
331
332 typedef struct hammer2_pfsmount hammer2_pfsmount_t;
333
334 #define HAMMER2_CLUSTERCTL_KILL 0x0001
335
336 /*
337  * In-memory message structure for hammer2.
338  *
339  * Persistent cache state messages will be associated with a hammer2_chain.
340  *
341  * NOTE!  If REPLY is set then the source and target fields in the message
342  *        are swapped.  That is, source and target remain unchanged whether
343  *        the message is a command from side A or a reply from side B.
344  *        The message is routed based on target if REPLY is not set, and on
345  *        source if REPLY is set.
346  */
347 struct hammer2_state {
348         RB_ENTRY(hammer2_state) rbnode;         /* indexed by msgid */
349         struct hammer2_pfsmount *pmp;
350         uint32_t        txcmd;                  /* mostly for CMDF flags */
351         uint32_t        rxcmd;                  /* mostly for CMDF flags */
352         uint16_t        source;                 /* command originator */
353         uint16_t        target;                 /* reply originator */
354         uint32_t        msgid;                  /* {source,target,msgid} uniq */
355         int             flags;
356         int             error;
357         struct hammer2_chain *chain;            /* msg associated w/chain */
358         struct hammer2_msg *msg;
359         int (*func)(struct hammer2_pfsmount *, struct hammer2_msg *);
360 };
361
362 #define HAMMER2_STATE_INSERTED  0x0001
363 #define HAMMER2_STATE_DYNAMIC   0x0002
364
365 struct hammer2_msg {
366         TAILQ_ENTRY(hammer2_msg) qentry;        /* serialized queue */
367         struct hammer2_state *state;
368         size_t          hdr_size;
369         size_t          aux_size;
370         char            *aux_data;
371         hammer2_msg_any_t any;
372 };
373
374 typedef struct hammer2_state hammer2_state_t;
375 typedef struct hammer2_msg hammer2_msg_t;
376
377 int hammer2_state_cmp(hammer2_state_t *state1, hammer2_state_t *state2);
378 RB_PROTOTYPE(hammer2_state_tree, hammer2_state, rbnode, hammer2_state_cmp);
379
380
381 #if defined(_KERNEL)
382
383 MALLOC_DECLARE(M_HAMMER2);
384
385 #define VTOI(vp)        ((hammer2_inode_t *)(vp)->v_data)
386 #define ITOV(ip)        ((ip)->vp)
387
388 static __inline
389 hammer2_pfsmount_t *
390 MPTOPMP(struct mount *mp)
391 {
392         return ((hammer2_pfsmount_t *)mp->mnt_data);
393 }
394
395 static __inline
396 hammer2_mount_t *
397 MPTOHMP(struct mount *mp)
398 {
399         return (((hammer2_pfsmount_t *)mp->mnt_data)->hmp);
400 }
401
402 extern struct vop_ops hammer2_vnode_vops;
403 extern struct vop_ops hammer2_spec_vops;
404 extern struct vop_ops hammer2_fifo_vops;
405
406 extern int hammer2_debug;
407 extern int hammer2_cluster_enable;
408 extern int hammer2_hardlink_enable;
409 extern long hammer2_iod_file_read;
410 extern long hammer2_iod_meta_read;
411 extern long hammer2_iod_indr_read;
412 extern long hammer2_iod_file_write;
413 extern long hammer2_iod_meta_write;
414 extern long hammer2_iod_indr_write;
415 extern long hammer2_iod_volu_write;
416 extern long hammer2_ioa_file_read;
417 extern long hammer2_ioa_meta_read;
418 extern long hammer2_ioa_indr_read;
419 extern long hammer2_ioa_file_write;
420 extern long hammer2_ioa_meta_write;
421 extern long hammer2_ioa_indr_write;
422 extern long hammer2_ioa_volu_write;
423
424 /*
425  * hammer2_subr.c
426  */
427 void hammer2_inode_lock_ex(hammer2_inode_t *ip);
428 void hammer2_inode_unlock_ex(hammer2_inode_t *ip);
429 void hammer2_inode_lock_sh(hammer2_inode_t *ip);
430 void hammer2_inode_unlock_sh(hammer2_inode_t *ip);
431 void hammer2_inode_busy(hammer2_inode_t *ip);
432 void hammer2_inode_unbusy(hammer2_inode_t *ip);
433 void hammer2_voldata_lock(hammer2_mount_t *hmp);
434 void hammer2_voldata_unlock(hammer2_mount_t *hmp);
435
436 void hammer2_mount_exlock(hammer2_mount_t *hmp);
437 void hammer2_mount_shlock(hammer2_mount_t *hmp);
438 void hammer2_mount_unlock(hammer2_mount_t *hmp);
439
440 int hammer2_get_dtype(hammer2_inode_t *ip);
441 int hammer2_get_vtype(hammer2_inode_t *ip);
442 u_int8_t hammer2_get_obj_type(enum vtype vtype);
443 void hammer2_time_to_timespec(u_int64_t xtime, struct timespec *ts);
444 u_int64_t hammer2_timespec_to_time(struct timespec *ts);
445 u_int32_t hammer2_to_unix_xid(uuid_t *uuid);
446 void hammer2_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
447
448 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len);
449 int hammer2_bytes_to_radix(size_t bytes);
450
451 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
452                          hammer2_key_t *lbasep, hammer2_key_t *leofp);
453 void hammer2_update_time(uint64_t *timep);
454
455 /*
456  * hammer2_inode.c
457  */
458 struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp);
459
460 void hammer2_inode_lock_nlinks(hammer2_inode_t *ip);
461 void hammer2_inode_unlock_nlinks(hammer2_inode_t *ip);
462 hammer2_inode_t *hammer2_inode_alloc(hammer2_pfsmount_t *pmp, void *data);
463 void hammer2_inode_free(hammer2_inode_t *ip);
464 void hammer2_inode_ref(hammer2_inode_t *ip);
465 void hammer2_inode_drop(hammer2_inode_t *ip);
466 int hammer2_inode_calc_alloc(hammer2_key_t filesize);
467
468 int hammer2_inode_create(hammer2_inode_t *dip,
469                         struct vattr *vap, struct ucred *cred,
470                         const uint8_t *name, size_t name_len,
471                         hammer2_inode_t **nipp);
472
473 int hammer2_inode_duplicate(hammer2_inode_t *dip,
474                         hammer2_inode_t *oip, hammer2_inode_t **nipp,
475                         const uint8_t *name, size_t name_len);
476 int hammer2_inode_connect(hammer2_inode_t *dip, hammer2_inode_t *oip,
477                         const uint8_t *name, size_t name_len);
478
479 int hammer2_unlink_file(hammer2_inode_t *dip,
480                         const uint8_t *name, size_t name_len,
481                         int isdir, hammer2_inode_t *retain_ip);
482 int hammer2_hardlink_consolidate(hammer2_inode_t **ipp, hammer2_inode_t *tdip);
483 int hammer2_hardlink_deconsolidate(hammer2_inode_t *dip,
484                         hammer2_chain_t **chainp, hammer2_inode_t **ipp);
485 int hammer2_hardlink_find(hammer2_inode_t *dip, hammer2_chain_t **chainp,
486                         hammer2_inode_t **ipp);
487
488 /*
489  * hammer2_chain.c
490  */
491 void hammer2_modify_volume(hammer2_mount_t *hmp);
492 hammer2_chain_t *hammer2_chain_alloc(hammer2_mount_t *hmp,
493                                 hammer2_blockref_t *bref);
494 void hammer2_chain_free(hammer2_mount_t *hmp, hammer2_chain_t *chain);
495 void hammer2_chain_ref(hammer2_mount_t *hmp, hammer2_chain_t *chain);
496 void hammer2_chain_drop(hammer2_mount_t *hmp, hammer2_chain_t *chain);
497 int hammer2_chain_lock(hammer2_mount_t *hmp, hammer2_chain_t *chain, int how);
498 void hammer2_chain_moved(hammer2_mount_t *hmp, hammer2_chain_t *chain);
499 void hammer2_chain_modify(hammer2_mount_t *hmp, hammer2_chain_t *chain,
500                                 int flags);
501 void hammer2_chain_resize(hammer2_inode_t *ip, hammer2_chain_t *chain,
502                                 int nradix, int flags);
503 void hammer2_chain_unlock(hammer2_mount_t *hmp, hammer2_chain_t *chain);
504 hammer2_chain_t *hammer2_chain_find(hammer2_mount_t *hmp,
505                                 hammer2_chain_t *parent, int index);
506 hammer2_chain_t *hammer2_chain_get(hammer2_mount_t *hmp,
507                                 hammer2_chain_t *parent,
508                                 int index, int flags);
509 hammer2_chain_t *hammer2_chain_lookup(hammer2_mount_t *hmp,
510                                 hammer2_chain_t **parentp,
511                                 hammer2_key_t key_beg, hammer2_key_t key_end,
512                                 int flags);
513 hammer2_chain_t *hammer2_chain_next(hammer2_mount_t *hmp,
514                                 hammer2_chain_t **parentp,
515                                 hammer2_chain_t *chain,
516                                 hammer2_key_t key_beg, hammer2_key_t key_end,
517                                 int flags);
518 hammer2_chain_t *hammer2_chain_create(hammer2_mount_t *hmp,
519                                 hammer2_chain_t *parent,
520                                 hammer2_chain_t *chain,
521                                 hammer2_key_t key, int keybits,
522                                 int type, size_t bytes);
523 void hammer2_chain_delete(hammer2_mount_t *hmp, hammer2_chain_t *parent,
524                                 hammer2_chain_t *chain, int retain);
525 void hammer2_chain_flush(hammer2_mount_t *hmp, hammer2_chain_t *chain,
526                                 hammer2_tid_t modify_tid);
527 void hammer2_chain_commit(hammer2_mount_t *hmp, hammer2_chain_t *chain);
528
529 /*
530  * hammer2_ioctl.c
531  */
532 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
533                                 int fflag, struct ucred *cred);
534
535 /*
536  * hammer2_msg.c
537  */
538 int hammer2_state_msgrx(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
539 int hammer2_state_msgtx(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
540 void hammer2_state_cleanuprx(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
541 void hammer2_state_cleanuptx(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
542 int hammer2_msg_execute(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
543 void hammer2_state_free(hammer2_state_t *state);
544 void hammer2_msg_free(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
545 hammer2_msg_t *hammer2_msg_alloc(hammer2_pfsmount_t *pmp,
546                                 uint16_t source, uint16_t target,
547                                 uint32_t cmd);
548 hammer2_state_t *hammer2_msg_write(hammer2_pfsmount_t *pmp,
549                                 hammer2_msg_t *msg,
550                                 int (*func)(hammer2_pfsmount_t *,
551                                             hammer2_msg_t *));
552
553 /*
554  * hammer2_msgops.c
555  */
556 int hammer2_msg_adhoc_input(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
557
558 /*
559  * hammer2_freemap.c
560  */
561 hammer2_off_t hammer2_freemap_alloc(hammer2_mount_t *hmp,
562                                 int type, size_t bytes);
563 void hammer2_freemap_free(hammer2_mount_t *hmp, hammer2_off_t data_off,
564                                 int type);
565
566 #endif /* !_KERNEL */
567 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */