hammer2 - Initial CCMS adaptation and code-up
[dragonfly.git] / sys / vfs / hammer2 / hammer2.h
CommitLineData
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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/globaldata.h>
58#include <sys/lockf.h>
59#include <sys/buf.h>
60#include <sys/queue.h>
61#include <sys/limits.h>
62#include <sys/buf2.h>
63#include <sys/signal2.h>
64#include <sys/tree.h>
65
66#include "hammer2_disk.h"
67#include "hammer2_mount.h"
2910a90c 68#include "hammer2_ioctl.h"
1ad77ed9 69#include "hammer2_ccms.h"
703720e4 70
5c23d7f1 71struct hammer2_chain;
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72struct hammer2_inode;
73struct hammer2_mount;
e4e20f48 74struct hammer2_pfsmount;
703720e4 75
703720e4 76/*
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77 * The chain structure tracks blockref recursions all the way to
78 * the root volume. These consist of indirect blocks, inodes,
79 * and eventually the volume header.
80 *
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81 * The chain structure is embedded in the hammer2_mount, hammer2_inode,
82 * and other system memory structures. The chain structure typically
83 * implements the reference count and busy flag for the larger structure.
84 *
85 * It is always possible to track a chain element all the way back to the
86 * root by following the (parent) links. (index) is a type-dependent index
87 * in the parent indicating where in the parent the chain element resides.
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88 *
89 * When a blockref is added or deleted the related chain element is marked
90 * modified and all of its parents are marked SUBMODIFIED (the parent
91 * recursion can stop once we hit a node that is already marked SUBMODIFIED).
92 * A deleted chain element must remain intact until synchronized against
93 * its parent.
94 *
95 * The blockref at (parent, index) is not adjusted until the modified chain
96 * element is flushed and unmarked. Until then the child's blockref may
97 * not match the blockref at (parent, index).
50e4f8f4 98 */
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99SPLAY_HEAD(hammer2_chain_splay, hammer2_chain);
100
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101struct hammer2_chain {
102 struct hammer2_blockref bref;
004f88b4 103 struct hammer2_blockref bref_flush; /* synchronized w/MOVED bit */
1c9f601e 104 struct hammer2_chain *parent; /* return chain to root */
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105 struct hammer2_chain_splay shead;
106 SPLAY_ENTRY(hammer2_chain) snode;
1c9f601e 107 TAILQ_ENTRY(hammer2_chain) flush_node; /* flush deferral list */
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108 union {
109 struct hammer2_inode *ip;
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110 struct hammer2_indblock *np;
111 struct hammer2_data *dp;
112 void *mem;
7cfa8da5 113 } u;
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114
115 struct buf *bp; /* buffer cache (ro) */
116 hammer2_media_data_t *data; /* modified copy of data (rw) */
866d5273 117 u_int bytes; /* physical size of data */
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118 struct lock lk; /* lockmgr lock */
119 int index; /* index in parent */
120 u_int refs;
121 u_int busy; /* soft-busy */
122 u_int flags;
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123};
124
125typedef struct hammer2_chain hammer2_chain_t;
126
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127int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2);
128SPLAY_PROTOTYPE(hammer2_chain_splay, hammer2_chain, snode, hammer2_chain_cmp);
129
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130/*
131 * MOVED - This bit is set during the flush when the MODIFIED bit is cleared,
132 * indicating that the parent's blocktable must inherit a change to
133 * the bref (typically a block reallocation)
134 *
135 * It must also be set in situations where a chain is not MODIFIED
136 * but whos bref has changed (typically due to fields other than
137 * a block reallocation).
138 */
2910a90c 139#define HAMMER2_CHAIN_MODIFIED 0x00000001 /* active mods */
214f4a77 140#define HAMMER2_CHAIN_DIRTYEMBED 0x00000002 /* inode embedded */
a92f82c4 141#define HAMMER2_CHAIN_DIRTYBP 0x00000004 /* dirty on unlock */
73e441b9 142#define HAMMER2_CHAIN_SUBMODIFIED 0x00000008 /* 1+ subs modified */
b7926f31 143#define HAMMER2_CHAIN_DELETED 0x00000010
01eabad4 144#define HAMMER2_CHAIN_INITIAL 0x00000020 /* initial create */
c667909f 145#define HAMMER2_CHAIN_FLUSHED 0x00000040 /* flush on unlock */
28ee5f14 146#define HAMMER2_CHAIN_MOVED 0x00000080 /* bref changed */
37aa19df 147#define HAMMER2_CHAIN_IOFLUSH 0x00000100 /* bawrite on put */
1c9f601e 148#define HAMMER2_CHAIN_DEFERRED 0x00000200 /* on a deferral list*/
222d9e22 149#define HAMMER2_CHAIN_DESTROYED 0x00000400 /* destroying */
2910a90c 150#define HAMMER2_CHAIN_MODIFIED_AUX 0x00000800 /* hmp->vchain only */
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151#define HAMMER2_CHAIN_MODIFY_TID 0x00001000 /* mod updates field */
152#define HAMMER2_CHAIN_MOUNTED 0x00002000 /* PFS is mounted */
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153
154/*
155 * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
156 */
157#define HAMMER2_LOOKUP_NOLOCK 0x00000001 /* ref only */
8cce658d 158#define HAMMER2_LOOKUP_NODATA 0x00000002 /* data left NULL */
5c23d7f1 159
50e4f8f4 160/*
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161 * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
162 *
163 * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
164 * blocks in the INITIAL-create state.
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165 *
166 * NOTE: NO_MODIFY_TID tells the function to not set HAMMER2_CHAIN_MODIFY_TID
167 * when marking the chain modified (used when a sub-chain modification
168 * propagates upward).
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169 */
170#define HAMMER2_MODIFY_NOSUB 0x00000001 /* do not set SUBMOD */
171#define HAMMER2_MODIFY_OPTDATA 0x00000002 /* data can be NULL */
4d5318eb 172#define HAMMER2_MODIFY_NO_MODIFY_TID 0x00000004
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173
174/*
175 * Flags passed to hammer2_chain_lock()
176 */
177#define HAMMER2_RESOLVE_NEVER 1
178#define HAMMER2_RESOLVE_MAYBE 2
179#define HAMMER2_RESOLVE_ALWAYS 3
180
181/*
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182 * Cluster different types of storage together for allocations
183 */
184#define HAMMER2_FREECACHE_INODE 0
185#define HAMMER2_FREECACHE_INDIR 1
186#define HAMMER2_FREECACHE_DATA 2
187#define HAMMER2_FREECACHE_UNUSED3 3
188#define HAMMER2_FREECACHE_TYPES 4
189
190/*
191 * BMAP read-ahead maximum parameters
192 */
193#define HAMMER2_BMAP_COUNT 16 /* max bmap read-ahead */
194#define HAMMER2_BMAP_BYTES (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
195
196/*
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197 * Misc
198 */
199#define HAMMER2_FLUSH_DEPTH_LIMIT 40 /* stack recursion limit */
200
201/*
5c23d7f1 202 * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
7cfa8da5 203 *
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204 * There is an in-memory representation of all on-media data structure.
205 *
206 * When accessed read-only the data will be mapped to the related buffer
207 * cache buffer.
208 *
209 * When accessed read-write (marked modified) a kmalloc()'d copy of the
210 * is created which can then be modified. The copy is destroyed when a
211 * filesystem block is allocated to replace it.
212 *
213 * Active inodes (those with vnodes attached) will maintain the kmalloc()'d
214 * copy for both the read-only and the read-write case. The combination of
215 * (bp) and (data) determines whether (data) was allocated or not.
216 *
217 * The in-memory representation may remain cached (for example in order to
218 * placemark clustering locks) even after the related data has been
219 * detached.
220 */
221
222/*
223 * A hammer2 inode.
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224 */
225struct hammer2_inode {
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226 struct hammer2_mount *hmp; /* Global mount */
227 struct hammer2_pfsmount *pmp; /* PFS mount */
e028fa74 228 struct hammer2_inode *pip; /* parent inode */
703720e4 229 struct vnode *vp;
50e4f8f4 230 hammer2_chain_t chain;
5c23d7f1 231 struct hammer2_inode_data ip_data;
37aa19df 232 struct lockf advlock;
99535653 233 u_int depth; /* directory depth */
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234 hammer2_off_t delta_dcount; /* adjust data_count */
235 hammer2_off_t delta_icount; /* adjust inode_count */
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236};
237
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238typedef struct hammer2_inode hammer2_inode_t;
239
703720e4 240/*
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241 * A hammer2 indirect block
242 */
243struct hammer2_indblock {
244 hammer2_chain_t chain;
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245};
246
247typedef struct hammer2_indblock hammer2_indblock_t;
248
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249/*
250 * A hammer2 data block
251 */
252struct hammer2_data {
253 hammer2_chain_t chain;
254};
255
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256typedef struct hammer2_data hammer2_data_t;
257
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258struct hammer2_freecache {
259 hammer2_off_t bulk;
260 hammer2_off_t single;
261};
262
263typedef struct hammer2_freecache hammer2_freecache_t;
264
7cfa8da5 265/*
e4e20f48 266 * Global (per device) mount structure for device (aka vp->v_mount->hmp)
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267 */
268struct hammer2_mount {
50e4f8f4 269 struct vnode *devvp; /* device vnode */
50e4f8f4 270 int ronly; /* read-only mount */
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271 int pmp_count; /* PFS mounts backed by us */
272 TAILQ_ENTRY(hammer2_mount) mntentry; /* hammer2_mntlist */
703720e4 273
5c23d7f1 274 struct malloc_type *minode;
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275 int ninodes;
276 int maxinodes;
703720e4 277
5c23d7f1 278 struct malloc_type *mchain;
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279 int nipstacks;
280 int maxipstacks;
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281 hammer2_chain_t vchain; /* anchor chain */
282 hammer2_chain_t *schain; /* super-root */
01eabad4 283 struct lock alloclk; /* lockmgr lock */
2910a90c 284 struct lock voldatalk; /* lockmgr lock */
703720e4 285
54eb943b 286 hammer2_volume_data_t voldata;
004f88b4 287 hammer2_freecache_t freecache[HAMMER2_FREECACHE_TYPES][HAMMER2_MAX_RADIX+1];
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288};
289
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290typedef struct hammer2_mount hammer2_mount_t;
291
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292/*
293 * Per-PFS mount structure for device (aka vp->v_mount)
294 */
295struct hammer2_pfsmount {
296 struct mount *mp; /* kernel mount */
297 struct hammer2_mount *hmp; /* device global mount */
298 hammer2_chain_t *rchain; /* PFS root chain */
299 hammer2_inode_t *iroot; /* PFS root inode */
300 struct netexport export; /* nfs export */
301 int ronly; /* read-only mount */
302};
303
304typedef struct hammer2_pfsmount hammer2_pfsmount_t;
305
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306#if defined(_KERNEL)
307
308MALLOC_DECLARE(M_HAMMER2);
309
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310#define VTOI(vp) ((hammer2_inode_t *)(vp)->v_data)
311#define ITOV(ip) ((ip)->vp)
312
e118c14f 313static __inline
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314hammer2_pfsmount_t *
315MPTOPMP(struct mount *mp)
703720e4 316{
e4e20f48 317 return ((hammer2_pfsmount_t *)mp->mnt_data);
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318}
319
e118c14f 320static __inline
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321hammer2_mount_t *
322MPTOHMP(struct mount *mp)
47902fef 323{
e4e20f48 324 return (((hammer2_pfsmount_t *)mp->mnt_data)->hmp);
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325}
326
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327extern struct vop_ops hammer2_vnode_vops;
328extern struct vop_ops hammer2_spec_vops;
329extern struct vop_ops hammer2_fifo_vops;
330
37aa19df 331extern int hammer2_debug;
01eabad4 332extern int hammer2_cluster_enable;
e708f8b9 333extern int hammer2_hardlink_enable;
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334extern long hammer2_iod_file_read;
335extern long hammer2_iod_meta_read;
336extern long hammer2_iod_indr_read;
337extern long hammer2_iod_file_write;
338extern long hammer2_iod_meta_write;
339extern long hammer2_iod_indr_write;
340extern long hammer2_iod_volu_write;
341extern long hammer2_ioa_file_read;
342extern long hammer2_ioa_meta_read;
343extern long hammer2_ioa_indr_read;
344extern long hammer2_ioa_file_write;
345extern long hammer2_ioa_meta_write;
346extern long hammer2_ioa_indr_write;
347extern long hammer2_ioa_volu_write;
37aa19df 348
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349/*
350 * hammer2_subr.c
351 */
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352void hammer2_inode_lock_ex(hammer2_inode_t *ip);
353void hammer2_inode_unlock_ex(hammer2_inode_t *ip);
9c2e0de0 354void hammer2_inode_lock_sh(hammer2_inode_t *ip);
54eb943b 355void hammer2_inode_unlock_sh(hammer2_inode_t *ip);
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356void hammer2_inode_busy(hammer2_inode_t *ip);
357void hammer2_inode_unbusy(hammer2_inode_t *ip);
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358void hammer2_voldata_lock(hammer2_mount_t *hmp);
359void hammer2_voldata_unlock(hammer2_mount_t *hmp);
e118c14f 360
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361void hammer2_mount_exlock(hammer2_mount_t *hmp);
362void hammer2_mount_shlock(hammer2_mount_t *hmp);
363void hammer2_mount_unlock(hammer2_mount_t *hmp);
703720e4 364
e028fa74 365int hammer2_get_dtype(hammer2_inode_t *ip);
cd4b3d92 366int hammer2_get_vtype(hammer2_inode_t *ip);
37494cab 367u_int8_t hammer2_get_obj_type(enum vtype vtype);
cd4b3d92 368void hammer2_time_to_timespec(u_int64_t xtime, struct timespec *ts);
b2b78aaa 369u_int64_t hammer2_timespec_to_time(struct timespec *ts);
37494cab 370u_int32_t hammer2_to_unix_xid(uuid_t *uuid);
b2b78aaa 371void hammer2_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
e028fa74 372
7cfa8da5 373hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len);
6ba3b984 374int hammer2_bytes_to_radix(size_t bytes);
7cfa8da5 375
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376int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
377 hammer2_key_t *lbasep, hammer2_key_t *leofp);
b2b78aaa 378void hammer2_update_time(uint64_t *timep);
8cce658d 379
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380/*
381 * hammer2_inode.c
382 */
54eb943b 383struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp);
ae183399 384
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385void hammer2_inode_lock_nlinks(hammer2_inode_t *ip);
386void hammer2_inode_unlock_nlinks(hammer2_inode_t *ip);
e4e20f48 387hammer2_inode_t *hammer2_inode_alloc(hammer2_pfsmount_t *pmp, void *data);
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388void hammer2_inode_free(hammer2_inode_t *ip);
389void hammer2_inode_ref(hammer2_inode_t *ip);
390void hammer2_inode_drop(hammer2_inode_t *ip);
866d5273 391int hammer2_inode_calc_alloc(hammer2_key_t filesize);
6934ae32 392
e4e20f48 393int hammer2_inode_create(hammer2_inode_t *dip,
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394 struct vattr *vap, struct ucred *cred,
395 const uint8_t *name, size_t name_len,
396 hammer2_inode_t **nipp);
6934ae32 397
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398int hammer2_inode_duplicate(hammer2_inode_t *dip,
399 hammer2_inode_t *oip, hammer2_inode_t **nipp,
400 const uint8_t *name, size_t name_len);
401int hammer2_inode_connect(hammer2_inode_t *dip, hammer2_inode_t *oip,
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402 const uint8_t *name, size_t name_len);
403
ae183399 404int hammer2_unlink_file(hammer2_inode_t *dip,
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405 const uint8_t *name, size_t name_len,
406 int isdir, hammer2_inode_t *retain_ip);
99535653 407int hammer2_hardlink_consolidate(hammer2_inode_t **ipp, hammer2_inode_t *tdip);
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408int hammer2_hardlink_deconsolidate(hammer2_inode_t *dip,
409 hammer2_chain_t **chainp, hammer2_inode_t **ipp);
410int hammer2_hardlink_find(hammer2_inode_t *dip, hammer2_chain_t **chainp,
411 hammer2_inode_t **ipp);
ae183399 412
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413/*
414 * hammer2_chain.c
415 */
2910a90c 416void hammer2_modify_volume(hammer2_mount_t *hmp);
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417hammer2_chain_t *hammer2_chain_alloc(hammer2_mount_t *hmp,
418 hammer2_blockref_t *bref);
419void hammer2_chain_free(hammer2_mount_t *hmp, hammer2_chain_t *chain);
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420void hammer2_chain_ref(hammer2_mount_t *hmp, hammer2_chain_t *chain);
421void hammer2_chain_drop(hammer2_mount_t *hmp, hammer2_chain_t *chain);
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422int hammer2_chain_lock(hammer2_mount_t *hmp, hammer2_chain_t *chain, int how);
423void hammer2_chain_moved(hammer2_mount_t *hmp, hammer2_chain_t *chain);
214f4a77 424void hammer2_chain_modify(hammer2_mount_t *hmp, hammer2_chain_t *chain,
01eabad4 425 int flags);
28ee5f14 426void hammer2_chain_resize(hammer2_inode_t *ip, hammer2_chain_t *chain,
01eabad4 427 int nradix, int flags);
5c23d7f1 428void hammer2_chain_unlock(hammer2_mount_t *hmp, hammer2_chain_t *chain);
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429hammer2_chain_t *hammer2_chain_find(hammer2_mount_t *hmp,
430 hammer2_chain_t *parent, int index);
232a50f9 431hammer2_chain_t *hammer2_chain_get(hammer2_mount_t *hmp,
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432 hammer2_chain_t *parent,
433 int index, int flags);
5c23d7f1 434hammer2_chain_t *hammer2_chain_lookup(hammer2_mount_t *hmp,
e028fa74 435 hammer2_chain_t **parentp,
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436 hammer2_key_t key_beg, hammer2_key_t key_end,
437 int flags);
7cfa8da5 438hammer2_chain_t *hammer2_chain_next(hammer2_mount_t *hmp,
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439 hammer2_chain_t **parentp,
440 hammer2_chain_t *chain,
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441 hammer2_key_t key_beg, hammer2_key_t key_end,
442 int flags);
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443hammer2_chain_t *hammer2_chain_create(hammer2_mount_t *hmp,
444 hammer2_chain_t *parent,
6934ae32 445 hammer2_chain_t *chain,
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446 hammer2_key_t key, int keybits,
447 int type, size_t bytes);
3ac6a319 448void hammer2_chain_delete(hammer2_mount_t *hmp, hammer2_chain_t *parent,
004f88b4 449 hammer2_chain_t *chain, int retain);
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450void hammer2_chain_flush(hammer2_mount_t *hmp, hammer2_chain_t *chain,
451 hammer2_tid_t modify_tid);
b7926f31 452void hammer2_chain_commit(hammer2_mount_t *hmp, hammer2_chain_t *chain);
50e4f8f4 453
df9ea374 454/*
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455 * hammer2_ioctl.c
456 */
457int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
458 int fflag, struct ucred *cred);
459
460/*
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461 * hammer2_freemap.c
462 */
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463hammer2_off_t hammer2_freemap_alloc(hammer2_mount_t *hmp,
464 int type, size_t bytes);
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465void hammer2_freemap_free(hammer2_mount_t *hmp, hammer2_off_t data_off,
466 int type);
df9ea374 467
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468#endif /* !_KERNEL */
469#endif /* !_VFS_HAMMER2_HAMMER2_H_ */