Update example disklabel to bigger slice,
[dragonfly.git] / sys / vfs / hammer / hammer.h
CommitLineData
8750964d 1/*
1f07f686 2 * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved.
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3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
ea434b6f 34 * $DragonFly: src/sys/vfs/hammer/hammer.h,v 1.108 2008/07/09 10:29:20 dillon Exp $
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35 */
36/*
37 * This header file contains structures used internally by the HAMMERFS
c60bb2c5 38 * implementation. See hammer_disk.h for on-disk structures.
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39 */
40
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41#include <sys/param.h>
42#include <sys/types.h>
43#include <sys/kernel.h>
42c7d26b 44#include <sys/conf.h>
427e5fc6 45#include <sys/systm.h>
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46#include <sys/tree.h>
47#include <sys/malloc.h>
427e5fc6 48#include <sys/mount.h>
513ca7d7 49#include <sys/mountctl.h>
427e5fc6 50#include <sys/vnode.h>
42c7d26b 51#include <sys/proc.h>
e63644f0 52#include <sys/stat.h>
427e5fc6 53#include <sys/globaldata.h>
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54#include <sys/lockf.h>
55#include <sys/buf.h>
8cd0a023 56#include <sys/queue.h>
bcac4bbb 57#include <sys/ktr.h>
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58#include <sys/globaldata.h>
59
60#include <sys/buf2.h>
855942b6 61#include <sys/signal2.h>
427e5fc6 62#include "hammer_disk.h"
8750964d 63#include "hammer_mount.h"
7dc57964 64#include "hammer_ioctl.h"
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65
66#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
67
68MALLOC_DECLARE(M_HAMMER);
69
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70/*
71 * Kernel trace
72 */
73#if !defined(KTR_HAMMER)
74#define KTR_HAMMER KTR_ALL
75#endif
76KTR_INFO_MASTER_EXTERN(hammer);
77
78/*
79 * Misc structures
80 */
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81struct hammer_mount;
82
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83/*
84 * Key structure used for custom RB tree inode lookups. This prototypes
85 * the function hammer_ino_rb_tree_RB_LOOKUP_INFO(root, info).
86 */
87typedef struct hammer_inode_info {
513ca7d7 88 int64_t obj_id; /* (key) object identifier */
8750964d 89 hammer_tid_t obj_asof; /* (key) snapshot transid or 0 */
ddfdf542 90 u_int32_t obj_localization; /* (key) pseudo-fs */
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91 union {
92 struct hammer_btree_leaf_elm *leaf;
93 } u;
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94} *hammer_inode_info_t;
95
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96typedef enum hammer_transaction_type {
97 HAMMER_TRANS_RO,
98 HAMMER_TRANS_STD,
99 HAMMER_TRANS_FLS
100} hammer_transaction_type_t;
101
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102/*
103 * HAMMER Transaction tracking
104 */
105struct hammer_transaction {
b84de5af 106 hammer_transaction_type_t type;
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107 struct hammer_mount *hmp;
108 hammer_tid_t tid;
ddfdf542 109 u_int64_t time;
dd94f1b1 110 u_int32_t time32;
2f85fa4d 111 int sync_lock_refs;
a89aec1b 112 struct hammer_volume *rootvol;
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113};
114
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115typedef struct hammer_transaction *hammer_transaction_t;
116
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117/*
118 * HAMMER locks
119 */
427e5fc6 120struct hammer_lock {
0b075555 121 int refs; /* active references delay writes */
0b075555 122 int lockcount; /* lock count for exclusive/shared access */
427e5fc6 123 int wanted;
4a2796f3 124 int exwanted; /* number of threads waiting for ex lock */
427e5fc6 125 struct thread *locktd;
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126};
127
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128static __inline int
129hammer_islocked(struct hammer_lock *lock)
130{
8cd0a023 131 return(lock->lockcount != 0);
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132}
133
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134static __inline int
135hammer_isactive(struct hammer_lock *lock)
136{
137 return(lock->refs != 0);
138}
139
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140static __inline int
141hammer_islastref(struct hammer_lock *lock)
142{
143 return(lock->refs == 1);
144}
c60bb2c5 145
6a37e7e4 146/*
7aa3b8a6 147 * Return if we specifically own the lock exclusively.
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148 */
149static __inline int
7aa3b8a6 150hammer_lock_excl_owned(struct hammer_lock *lock, thread_t td)
6a37e7e4 151{
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152 if (lock->lockcount > 0 && lock->locktd == td)
153 return(1);
154 return(0);
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155}
156
ec4e8497 157/*
1f07f686 158 * Flush state, used by various structures
ec4e8497 159 */
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160typedef enum hammer_inode_state {
161 HAMMER_FST_IDLE,
162 HAMMER_FST_SETUP,
163 HAMMER_FST_FLUSH
164} hammer_inode_state_t;
ec4e8497 165
1f07f686 166TAILQ_HEAD(hammer_record_list, hammer_record);
ec4e8497 167
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168/*
169 * Pseudo-filesystem extended data tracking
170 */
171struct hammer_pfs_rb_tree;
172struct hammer_pseudofs_inmem;
173RB_HEAD(hammer_pfs_rb_tree, hammer_pseudofs_inmem);
174RB_PROTOTYPE2(hammer_pfs_rb_tree, hammer_pseudofs_inmem, rb_node,
175 hammer_pfs_rb_compare, u_int32_t);
176
177struct hammer_pseudofs_inmem {
178 RB_ENTRY(hammer_pseudofs_inmem) rb_node;
179 struct hammer_lock lock;
180 u_int32_t localization;
ea434b6f 181 hammer_tid_t create_tid;
a56cb012 182 udev_t fsid_udev;
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183 struct hammer_pseudofs_data pfsd;
184};
185
186typedef struct hammer_pseudofs_inmem *hammer_pseudofs_inmem_t;
187
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188/*
189 * Cache object ids. A fixed number of objid cache structures are
190 * created to reserve object id's for newly created files in multiples
191 * of 100,000, localized to a particular directory, and recycled as
192 * needed. This allows parallel create operations in different
193 * directories to retain fairly localized object ids which in turn
194 * improves reblocking performance and layout.
195 */
bf3b416b 196#define OBJID_CACHE_SIZE 1024
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197#define OBJID_CACHE_BULK 100000
198
199typedef struct hammer_objid_cache {
200 TAILQ_ENTRY(hammer_objid_cache) entry;
201 struct hammer_inode *dip;
202 hammer_tid_t next_tid;
203 int count;
204} *hammer_objid_cache_t;
205
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206/*
207 * Associate an inode with a B-Tree node to cache search start positions
208 */
209typedef struct hammer_node_cache {
210 TAILQ_ENTRY(hammer_node_cache) entry;
211 struct hammer_node *node;
212 struct hammer_inode *ip;
213} *hammer_node_cache_t;
214
215TAILQ_HEAD(hammer_node_cache_list, hammer_node_cache);
216
8750964d 217/*
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218 * Structure used to represent an inode in-memory.
219 *
220 * The record and data associated with an inode may be out of sync with
221 * the disk (xDIRTY flags), or not even on the disk at all (ONDISK flag
222 * clear).
223 *
224 * An inode may also hold a cache of unsynchronized records, used for
225 * database and directories only. Unsynchronized regular file data is
226 * stored in the buffer cache.
227 *
228 * NOTE: A file which is created and destroyed within the initial
229 * synchronization period can wind up not doing any disk I/O at all.
230 *
231 * Finally, an inode may cache numerous disk-referencing B-Tree cursors.
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232 */
233struct hammer_ino_rb_tree;
234struct hammer_inode;
235RB_HEAD(hammer_ino_rb_tree, hammer_inode);
236RB_PROTOTYPEX(hammer_ino_rb_tree, INFO, hammer_inode, rb_node,
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237 hammer_ino_rb_compare, hammer_inode_info_t);
238
239struct hammer_rec_rb_tree;
240struct hammer_record;
241RB_HEAD(hammer_rec_rb_tree, hammer_record);
242RB_PROTOTYPEX(hammer_rec_rb_tree, INFO, hammer_record, rb_node,
0832c9bb 243 hammer_rec_rb_compare, hammer_btree_leaf_elm_t);
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244
245TAILQ_HEAD(hammer_node_list, hammer_node);
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246
247struct hammer_inode {
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248 RB_ENTRY(hammer_inode) rb_node;
249 hammer_inode_state_t flush_state;
250 int flush_group;
059819e3 251 TAILQ_ENTRY(hammer_inode) flush_entry;
1f07f686 252 struct hammer_record_list target_list; /* target of dependant recs */
adf01747 253 int64_t obj_id; /* (key) object identifier */
b84de5af 254 hammer_tid_t obj_asof; /* (key) snapshot or 0 */
ddfdf542 255 u_int32_t obj_localization; /* (key) pseudo-fs */
b84de5af 256 struct hammer_mount *hmp;
0729c8c8 257 hammer_objid_cache_t objid_cache;
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258 int flags;
259 int error; /* flush error */
260 int cursor_ip_refs; /* sanity */
47637bff 261 int rsv_recs;
b84de5af 262 struct vnode *vp;
5fa5c92f 263 hammer_pseudofs_inmem_t pfsm;
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264 struct lockf advlock;
265 struct hammer_lock lock; /* sync copy interlock */
b84de5af 266 off_t trunc_off;
11ad5ade 267 struct hammer_btree_leaf_elm ino_leaf; /* in-memory cache */
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268 struct hammer_inode_data ino_data; /* in-memory cache */
269 struct hammer_rec_rb_tree rec_tree; /* in-memory cache */
bcac4bbb 270 struct hammer_node_cache cache[2]; /* search initiate cache */
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271
272 /*
273 * When a demark is created to synchronize an inode to
274 * disk, certain fields are copied so the front-end VOPs
275 * can continue to run in parallel with the synchronization
276 * occuring in the background.
277 */
278 int sync_flags; /* to-sync flags cache */
279 off_t sync_trunc_off; /* to-sync truncation */
a9d52b76 280 off_t save_trunc_off; /* write optimization */
11ad5ade 281 struct hammer_btree_leaf_elm sync_ino_leaf; /* to-sync cache */
b84de5af 282 struct hammer_inode_data sync_ino_data; /* to-sync cache */
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283};
284
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285typedef struct hammer_inode *hammer_inode_t;
286
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287#define VTOI(vp) ((struct hammer_inode *)(vp)->v_data)
288
8cd0a023 289#define HAMMER_INODE_DDIRTY 0x0001 /* in-memory ino_data is dirty */
ddfdf542 290 /* (not including atime/mtime) */
e63644f0 291#define HAMMER_INODE_RSV_INODES 0x0002 /* hmp->rsv_inodes bumped */
ea434b6f 292#define HAMMER_INODE_UNUSED0004 0x0004
1f07f686 293#define HAMMER_INODE_XDIRTY 0x0008 /* in-memory records */
8cd0a023 294#define HAMMER_INODE_ONDISK 0x0010 /* inode is on-disk (else not yet) */
a89aec1b 295#define HAMMER_INODE_FLUSH 0x0020 /* flush on last ref */
869e8f55 296#define HAMMER_INODE_DELETED 0x0080 /* inode delete (backend) */
76376933 297#define HAMMER_INODE_DELONDISK 0x0100 /* delete synchronized to disk */
d113fda1 298#define HAMMER_INODE_RO 0x0200 /* read-only (because of as-of) */
e8599db1 299#define HAMMER_INODE_VHELD 0x0400 /* vnode held on sync */
0a72edae 300#define HAMMER_INODE_DONDISK 0x0800 /* data records may be on disk */
f3b0f382 301#define HAMMER_INODE_BUFS 0x1000 /* dirty high level bps present */
b84de5af 302#define HAMMER_INODE_REFLUSH 0x2000 /* pipelined flush during flush */
9f5097dc 303#define HAMMER_INODE_RECLAIM 0x4000 /* trying to reclaim */
059819e3 304#define HAMMER_INODE_FLUSHW 0x8000 /* Someone waiting for flush */
8cd0a023 305
b84de5af 306#define HAMMER_INODE_TRUNCATED 0x00010000
869e8f55 307#define HAMMER_INODE_DELETING 0x00020000 /* inode delete request (frontend)*/
4e17f465 308#define HAMMER_INODE_RESIGNAL 0x00040000 /* re-signal on re-flush */
ddfdf542 309#define HAMMER_INODE_ATIME 0x00100000 /* in-memory atime modified */
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310#define HAMMER_INODE_MTIME 0x00200000 /* in-memory mtime modified */
311#define HAMMER_INODE_WOULDBLOCK 0x00400000 /* re-issue to new flush group */
b84de5af 312
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313#define HAMMER_INODE_MODMASK (HAMMER_INODE_DDIRTY| \
314 HAMMER_INODE_XDIRTY|HAMMER_INODE_BUFS| \
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315 HAMMER_INODE_ATIME|HAMMER_INODE_MTIME| \
316 HAMMER_INODE_TRUNCATED|HAMMER_INODE_DELETING)
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317
318#define HAMMER_INODE_MODMASK_NOXDIRTY \
319 (HAMMER_INODE_MODMASK & ~HAMMER_INODE_XDIRTY)
0b075555 320
cb51be26 321#define HAMMER_FLUSH_GROUP_SIZE 64
66325755 322
f90dde4c 323#define HAMMER_FLUSH_SIGNAL 0x0001
4e17f465 324#define HAMMER_FLUSH_RECURSION 0x0002
f90dde4c 325
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326/*
327 * Used by the inode reclaim code to pipeline reclaims and avoid
328 * blowing out kernel memory or letting the flusher get too far
329 * behind.
330 */
331struct hammer_reclaim {
332 TAILQ_ENTRY(hammer_reclaim) entry;
333 int okydoky;
334};
335
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336#define HAMMER_RECLAIM_FLUSH 2000
337#define HAMMER_RECLAIM_WAIT 4000
9f5097dc 338
8750964d 339/*
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340 * Structure used to represent an unsynchronized record in-memory. These
341 * records typically represent directory entries. Only non-historical
342 * records are kept in-memory.
343 *
344 * Records are organized as a per-inode RB-Tree. If the inode is not
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345 * on disk then neither are any records and the in-memory record tree
346 * represents the entire contents of the inode. If the inode is on disk
347 * then the on-disk B-Tree is scanned in parallel with the in-memory
348 * RB-Tree to synthesize the current state of the file.
349 *
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350 * Records are also used to enforce the ordering of directory create/delete
351 * operations. A new inode will not be flushed to disk unless its related
352 * directory entry is also being flushed at the same time. A directory entry
353 * will not be removed unless its related inode is also being removed at the
354 * same time.
8750964d 355 */
1f07f686 356typedef enum hammer_record_type {
e8599db1 357 HAMMER_MEM_RECORD_GENERAL, /* misc record */
930bf163 358 HAMMER_MEM_RECORD_INODE, /* inode record */
1f07f686 359 HAMMER_MEM_RECORD_ADD, /* positive memory cache record */
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360 HAMMER_MEM_RECORD_DEL, /* negative delete-on-disk record */
361 HAMMER_MEM_RECORD_DATA /* bulk-data record w/on-disk ref */
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362} hammer_record_type_t;
363
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364struct hammer_record {
365 RB_ENTRY(hammer_record) rb_node;
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366 TAILQ_ENTRY(hammer_record) target_entry;
367 hammer_inode_state_t flush_state;
368 int flush_group;
369 hammer_record_type_t type;
a89aec1b 370 struct hammer_lock lock;
0832c9bb 371 struct hammer_reserve *resv;
8cd0a023 372 struct hammer_inode *ip;
1f07f686 373 struct hammer_inode *target_ip;
11ad5ade 374 struct hammer_btree_leaf_elm leaf;
8cd0a023 375 union hammer_data_ondisk *data;
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376 int flags;
377};
8750964d 378
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379typedef struct hammer_record *hammer_record_t;
380
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381/*
382 * Record flags. Note that FE can only be set by the frontend if the
383 * record has not been interlocked by the backend w/ BE.
384 */
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385#define HAMMER_RECF_ALLOCDATA 0x0001
386#define HAMMER_RECF_ONRBTREE 0x0002
b84de5af 387#define HAMMER_RECF_DELETED_FE 0x0004 /* deleted (frontend) */
d36ec43b 388#define HAMMER_RECF_DELETED_BE 0x0008 /* deleted (backend) */
11ad5ade 389#define HAMMER_RECF_UNUSED0010 0x0010
d36ec43b 390#define HAMMER_RECF_INTERLOCK_BE 0x0020 /* backend interlock */
0832c9bb 391#define HAMMER_RECF_WANTED 0x0040 /* wanted by the frontend */
1f07f686 392#define HAMMER_RECF_CONVERT_DELETE 0x0100 /* special case */
8cd0a023 393
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394/*
395 * hammer_delete_at_cursor() flags
396 */
397#define HAMMER_DELETE_ADJUST 0x0001
398#define HAMMER_DELETE_DESTROY 0x0002
399
8cd0a023 400/*
47197d71 401 * In-memory structures representing on-disk structures.
8cd0a023 402 */
8750964d 403struct hammer_volume;
427e5fc6 404struct hammer_buffer;
8cd0a023 405struct hammer_node;
e8599db1 406struct hammer_undo;
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407struct hammer_reserve;
408
8750964d 409RB_HEAD(hammer_vol_rb_tree, hammer_volume);
427e5fc6 410RB_HEAD(hammer_buf_rb_tree, hammer_buffer);
8cd0a023 411RB_HEAD(hammer_nod_rb_tree, hammer_node);
e8599db1 412RB_HEAD(hammer_und_rb_tree, hammer_undo);
0832c9bb 413RB_HEAD(hammer_res_rb_tree, hammer_reserve);
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414
415RB_PROTOTYPE2(hammer_vol_rb_tree, hammer_volume, rb_node,
416 hammer_vol_rb_compare, int32_t);
427e5fc6 417RB_PROTOTYPE2(hammer_buf_rb_tree, hammer_buffer, rb_node,
47197d71 418 hammer_buf_rb_compare, hammer_off_t);
8cd0a023 419RB_PROTOTYPE2(hammer_nod_rb_tree, hammer_node, rb_node,
47197d71 420 hammer_nod_rb_compare, hammer_off_t);
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421RB_PROTOTYPE2(hammer_und_rb_tree, hammer_undo, rb_node,
422 hammer_und_rb_compare, hammer_off_t);
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423RB_PROTOTYPE2(hammer_res_rb_tree, hammer_reserve, rb_node,
424 hammer_res_rb_compare, hammer_off_t);
8750964d 425
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426/*
427 * IO management - embedded at the head of various in-memory structures
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428 *
429 * VOLUME - hammer_volume containing meta-data
430 * META_BUFFER - hammer_buffer containing meta-data
431 * DATA_BUFFER - hammer_buffer containing pure-data
432 *
433 * Dirty volume headers and dirty meta-data buffers are locked until the
434 * flusher can sequence them out. Dirty pure-data buffers can be written.
435 * Clean buffers can be passively released.
66325755 436 */
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437typedef enum hammer_io_type {
438 HAMMER_STRUCTURE_VOLUME,
439 HAMMER_STRUCTURE_META_BUFFER,
440 HAMMER_STRUCTURE_UNDO_BUFFER,
441 HAMMER_STRUCTURE_DATA_BUFFER
442} hammer_io_type_t;
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443
444union hammer_io_structure;
055f5ff8 445struct hammer_io;
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446
447struct worklist {
448 LIST_ENTRY(worklist) node;
449};
450
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451TAILQ_HEAD(hammer_io_list, hammer_io);
452typedef struct hammer_io_list *hammer_io_list_t;
055f5ff8 453
66325755 454struct hammer_io {
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455 struct worklist worklist;
456 struct hammer_lock lock;
457 enum hammer_io_type type;
458 struct hammer_mount *hmp;
459 TAILQ_ENTRY(hammer_io) mod_entry; /* list entry if modified */
460 hammer_io_list_t mod_list;
461 struct buf *bp;
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462 int64_t offset; /* zone-2 offset */
463 int bytes; /* buffer cache buffer size */
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464 int loading; /* loading/unloading interlock */
465 int modify_refs;
466
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467 u_int modified : 1; /* bp's data was modified */
468 u_int released : 1; /* bp released (w/ B_LOCKED set) */
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469 u_int running : 1; /* bp write IO in progress */
470 u_int waiting : 1; /* someone is waiting on us */
b33e2cc0 471 u_int validated : 1; /* ondisk has been validated */
b58c6388 472 u_int waitdep : 1; /* flush waits for dependancies */
51c35492 473 u_int recovered : 1; /* has recovery ref */
9f5097dc 474 u_int waitmod : 1; /* waiting for modify_refs */
cebe9493 475 u_int reclaim : 1; /* reclaim requested */
bcac4bbb 476 u_int gencrc : 1; /* crc needs to be generated */
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477};
478
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479typedef struct hammer_io *hammer_io_t;
480
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481#define HAMMER_CLUSTER_SIZE (64 * 1024)
482#if HAMMER_CLUSTER_SIZE > MAXBSIZE
483#undef HAMMER_CLUSTER_SIZE
484#define HAMMER_CLUSTER_SIZE MAXBSIZE
485#endif
486#define HAMMER_CLUSTER_BUFS (HAMMER_CLUSTER_SIZE / HAMMER_BUFSIZE)
487
66325755 488/*
8cd0a023 489 * In-memory volume representing on-disk buffer
66325755 490 */
8750964d 491struct hammer_volume {
66325755 492 struct hammer_io io;
8750964d 493 RB_ENTRY(hammer_volume) rb_node;
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494 struct hammer_volume_ondisk *ondisk;
495 int32_t vol_no;
fbc6e32a 496 int64_t nblocks; /* note: special calculation for statfs */
47197d71 497 int64_t buffer_base; /* base offset of buffer 0 */
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498 hammer_off_t maxbuf_off; /* Maximum buffer offset (zone-2) */
499 hammer_off_t maxraw_off; /* Maximum raw offset for device */
c60bb2c5 500 char *vol_name;
8750964d 501 struct vnode *devvp;
427e5fc6 502 int vol_flags;
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503};
504
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505typedef struct hammer_volume *hammer_volume_t;
506
66325755 507/*
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508 * In-memory buffer (other then volume, super-cluster, or cluster),
509 * representing an on-disk buffer.
66325755 510 */
427e5fc6 511struct hammer_buffer {
66325755 512 struct hammer_io io;
427e5fc6 513 RB_ENTRY(hammer_buffer) rb_node;
47197d71 514 void *ondisk;
427e5fc6 515 struct hammer_volume *volume;
34d829f7 516 hammer_off_t zoneX_offset;
0832c9bb 517 hammer_off_t zone2_offset;
cebe9493 518 struct hammer_reserve *resv;
8cd0a023 519 struct hammer_node_list clist;
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520};
521
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522typedef struct hammer_buffer *hammer_buffer_t;
523
524/*
525 * In-memory B-Tree node, representing an on-disk B-Tree node.
526 *
527 * This is a hang-on structure which is backed by a hammer_buffer,
528 * indexed by a hammer_cluster, and used for fine-grained locking of
529 * B-Tree nodes in order to properly control lock ordering. A hammer_buffer
530 * can contain multiple nodes representing wildly disassociated portions
531 * of the B-Tree so locking cannot be done on a buffer-by-buffer basis.
532 *
533 * This structure uses a cluster-relative index to reduce the number
534 * of layers required to access it, and also because all on-disk B-Tree
535 * references are cluster-relative offsets.
536 */
537struct hammer_node {
538 struct hammer_lock lock; /* node-by-node lock */
539 TAILQ_ENTRY(hammer_node) entry; /* per-buffer linkage */
540 RB_ENTRY(hammer_node) rb_node; /* per-cluster linkage */
47197d71 541 hammer_off_t node_offset; /* full offset spec */
40043e7f 542 struct hammer_mount *hmp;
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543 struct hammer_buffer *buffer; /* backing buffer */
544 hammer_node_ondisk_t ondisk; /* ptr to on-disk structure */
b3bad96f 545 TAILQ_HEAD(, hammer_cursor) cursor_list; /* deadlock recovery */
bcac4bbb 546 struct hammer_node_cache_list cache_list; /* passive caches */
b3deaf57 547 int flags;
740d8317 548 int loading; /* load interlock */
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549};
550
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551#define HAMMER_NODE_DELETED 0x0001
552#define HAMMER_NODE_FLUSH 0x0002
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553#define HAMMER_NODE_CRCGOOD 0x0004
554#define HAMMER_NODE_NEEDSCRC 0x0008
c82af904 555#define HAMMER_NODE_NEEDSMIRROR 0x0010
b3deaf57 556
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557typedef struct hammer_node *hammer_node_t;
558
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559/*
560 * List of locked nodes.
561 */
562struct hammer_node_locklist {
563 struct hammer_node_locklist *next;
564 hammer_node_t node;
565};
566
567typedef struct hammer_node_locklist *hammer_node_locklist_t;
568
569
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570/*
571 * Common I/O management structure - embedded in in-memory structures
572 * which are backed by filesystem buffers.
573 */
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574union hammer_io_structure {
575 struct hammer_io io;
576 struct hammer_volume volume;
66325755 577 struct hammer_buffer buffer;
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578};
579
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580typedef union hammer_io_structure *hammer_io_structure_t;
581
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582/*
583 * The reserve structure prevents the blockmap from allocating
584 * out of a reserved bigblock. Such reservations are used by
585 * the direct-write mechanism.
586 *
587 * The structure is also used to hold off on reallocations of
588 * big blocks from the freemap until flush dependancies have
589 * been dealt with.
590 */
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591struct hammer_reserve {
592 RB_ENTRY(hammer_reserve) rb_node;
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593 TAILQ_ENTRY(hammer_reserve) delay_entry;
594 int flush_group;
cb51be26 595 int flags;
0832c9bb 596 int refs;
cb51be26 597 int zone;
df301614 598 int append_off;
cebe9493 599 hammer_off_t zone_offset;
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600};
601
602typedef struct hammer_reserve *hammer_reserve_t;
603
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604#define HAMMER_RESF_ONDELAY 0x0001
605
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606#include "hammer_cursor.h"
607
e8599db1 608/*
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609 * The undo structure tracks recent undos to avoid laying down duplicate
610 * undos within a flush group, saving us a significant amount of overhead.
611 *
612 * This is strictly a heuristic.
e8599db1 613 */
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614#define HAMMER_MAX_UNDOS 1024
615#define HAMMER_MAX_FLUSHERS 4
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616
617struct hammer_undo {
618 RB_ENTRY(hammer_undo) rb_node;
619 TAILQ_ENTRY(hammer_undo) lru_entry;
620 hammer_off_t offset;
621 int bytes;
622};
623
624typedef struct hammer_undo *hammer_undo_t;
625
af209b0f 626struct hammer_flusher_info;
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627
628struct hammer_flusher {
629 int signal; /* flusher thread sequencer */
630 int act; /* currently active flush group */
631 int done; /* set to act when complete */
632 int next; /* next flush group */
633 int group_lock; /* lock sequencing of the next flush */
634 int exiting; /* request master exit */
635 int count; /* number of slave flushers */
636 int running; /* number of slave flushers running */
637 thread_t td; /* master flusher thread */
638 hammer_tid_t tid; /* last flushed transaction id */
639 int finalize_want; /* serialize finalization */
640 struct hammer_lock finalize_lock; /* serialize finalization */
641 struct hammer_transaction trans; /* shared transaction */
642 struct hammer_flusher_info *info[HAMMER_MAX_FLUSHERS];
643};
644
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645/*
646 * Internal hammer mount data structure
647 */
648struct hammer_mount {
649 struct mount *mp;
27ea2398 650 /*struct vnode *rootvp;*/
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651 struct hammer_ino_rb_tree rb_inos_root;
652 struct hammer_vol_rb_tree rb_vols_root;
40043e7f 653 struct hammer_nod_rb_tree rb_nods_root;
e8599db1 654 struct hammer_und_rb_tree rb_undo_root;
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655 struct hammer_res_rb_tree rb_resv_root;
656 struct hammer_buf_rb_tree rb_bufs_root;
5fa5c92f 657 struct hammer_pfs_rb_tree rb_pfsm_root;
8750964d 658 struct hammer_volume *rootvol;
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659 struct hammer_base_elm root_btree_beg;
660 struct hammer_base_elm root_btree_end;
9f5097dc 661 int flags;
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662 int hflags;
663 int ronly;
664 int nvolumes;
d26d0ae9 665 int volume_iterator;
5de0c0e5 666 int masterid; /* -1 or 0-15 - clustering and mirroring */
e63644f0 667 int rsv_inodes; /* reserved space due to dirty inodes */
a7e9bef1 668 int64_t rsv_databytes; /* reserved space due to record data */
e63644f0 669 int rsv_recs; /* reserved space due to dirty records */
a7e9bef1 670 int rsv_fromdelay; /* bigblocks reserved due to flush delay */
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671 int last_newrecords;
672 int count_newrecords;
da2da375 673
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674 int inode_reclaims; /* inodes pending reclaim by flusher */
675 int count_inodes; /* total number of inodes */
af209b0f 676 int count_iqueued; /* inodes queued to flusher */
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677
678 struct hammer_flusher flusher;
679
855942b6 680 u_int check_interrupt;
8750964d 681 uuid_t fsid;
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682 struct hammer_io_list volu_list; /* dirty undo buffers */
683 struct hammer_io_list undo_list; /* dirty undo buffers */
684 struct hammer_io_list data_list; /* dirty data buffers */
0832c9bb 685 struct hammer_io_list alt_data_list; /* dirty data buffers */
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686 struct hammer_io_list meta_list; /* dirty meta bufs */
687 struct hammer_io_list lose_list; /* loose buffers */
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688 int locked_dirty_space; /* meta/volu count */
689 int io_running_space;
0729c8c8 690 int objid_cache_count;
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691 hammer_tid_t asof; /* snapshot mount */
692 hammer_off_t next_tid;
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693 int64_t copy_stat_freebigblocks; /* number of free bigblocks */
694
66325755 695 u_int32_t namekey_iterator;
513ca7d7 696 struct netexport export;
9480ff55 697 struct hammer_lock sync_lock;
c9b9e29d 698 struct hammer_lock free_lock;
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699 struct hammer_lock undo_lock;
700 struct hammer_lock blkmap_lock;
0729c8c8 701 struct hammer_blockmap blockmap[HAMMER_MAX_ZONES];
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702 struct hammer_undo undos[HAMMER_MAX_UNDOS];
703 int undo_alloc;
704 TAILQ_HEAD(, hammer_undo) undo_lru_list;
059819e3 705 TAILQ_HEAD(, hammer_inode) flush_list;
cebe9493 706 TAILQ_HEAD(, hammer_reserve) delay_list;
0729c8c8 707 TAILQ_HEAD(, hammer_objid_cache) objid_cache_list;
7bc5b8c2 708 TAILQ_HEAD(, hammer_reclaim) reclaim_list;
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709};
710
8cd0a023 711typedef struct hammer_mount *hammer_mount_t;
8750964d 712
7bc5b8c2 713#define HAMMER_MOUNT_UNUSED0001 0x0001
9f5097dc 714
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715struct hammer_sync_info {
716 int error;
717 int waitfor;
718};
719
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720#endif
721
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722/*
723 * checkspace slop (8MB chunks), higher numbers are more conservative.
724 */
725#define HAMMER_CHECKSPACE_SLOP_REBLOCK 25
726#define HAMMER_CHECKSPACE_SLOP_WRITE 20
e4a5ff06 727#define HAMMER_CHECKSPACE_SLOP_CREATE 20
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728#define HAMMER_CHECKSPACE_SLOP_REMOVE 10
729
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730#if defined(_KERNEL)
731
732extern struct vop_ops hammer_vnode_vops;
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733extern struct vop_ops hammer_spec_vops;
734extern struct vop_ops hammer_fifo_vops;
66325755 735extern struct bio_ops hammer_bioops;
427e5fc6 736
2f85fa4d 737extern int hammer_debug_io;
d5ef456e 738extern int hammer_debug_general;
77062c8a 739extern int hammer_debug_debug;
e8599db1 740extern int hammer_debug_inode;
7d683b0f 741extern int hammer_debug_locks;
b3deaf57 742extern int hammer_debug_btree;
d113fda1 743extern int hammer_debug_tid;
b33e2cc0 744extern int hammer_debug_recover;
46fe7ae1 745extern int hammer_debug_recover_faults;
a99b9ea2 746extern int hammer_debug_cluster_enable;
b3deaf57 747extern int hammer_count_inodes;
af209b0f 748extern int hammer_count_iqueued;
9f5097dc 749extern int hammer_count_reclaiming;
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750extern int hammer_count_records;
751extern int hammer_count_record_datas;
752extern int hammer_count_volumes;
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753extern int hammer_count_buffers;
754extern int hammer_count_nodes;
a7e9bef1 755extern int64_t hammer_count_extra_space_used;
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756extern int64_t hammer_stats_btree_lookups;
757extern int64_t hammer_stats_btree_searches;
758extern int64_t hammer_stats_btree_inserts;
759extern int64_t hammer_stats_btree_deletes;
760extern int64_t hammer_stats_btree_elements;
761extern int64_t hammer_stats_btree_splits;
762extern int64_t hammer_stats_btree_iterations;
763extern int64_t hammer_stats_record_iterations;
f5a07a7a 764extern int hammer_count_dirtybufspace;
a99b9ea2 765extern int hammer_count_refedbufs;
0832c9bb 766extern int hammer_count_reservations;
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767extern int hammer_count_io_running_read;
768extern int hammer_count_io_running_write;
769extern int hammer_count_io_locked;
f5a07a7a 770extern int hammer_limit_dirtybufspace;
af209b0f 771extern int hammer_limit_iqueued;
47637bff 772extern int hammer_limit_recs;
1f07f686 773extern int hammer_bio_count;
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774extern int hammer_verify_zone;
775extern int hammer_write_mode;
7d683b0f 776extern int64_t hammer_contention_count;
b3deaf57 777
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778int hammer_vop_inactive(struct vop_inactive_args *);
779int hammer_vop_reclaim(struct vop_reclaim_args *);
e8599db1 780int hammer_get_vnode(struct hammer_inode *ip, struct vnode **vpp);
36f82b23 781struct hammer_inode *hammer_get_inode(hammer_transaction_t trans,
adf01747 782 hammer_inode_t dip, int64_t obj_id,
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783 hammer_tid_t asof, u_int32_t localization,
784 int flags, int *errorp);
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785void hammer_scan_inode_snapshots(hammer_mount_t hmp,
786 hammer_inode_info_t iinfo,
787 int (*callback)(hammer_inode_t ip, void *data),
788 void *data);
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789void hammer_put_inode(struct hammer_inode *ip);
790void hammer_put_inode_ref(struct hammer_inode *ip);
4a2796f3 791void hammer_inode_waitreclaims(hammer_mount_t hmp);
66325755 792
8cd0a023 793int hammer_unload_volume(hammer_volume_t volume, void *data __unused);
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794int hammer_adjust_volume_mode(hammer_volume_t volume, void *data __unused);
795
a89aec1b 796int hammer_unload_buffer(hammer_buffer_t buffer, void *data __unused);
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797int hammer_install_volume(hammer_mount_t hmp, const char *volname);
798
45a014dc 799int hammer_ip_lookup(hammer_cursor_t cursor);
4e17f465 800int hammer_ip_first(hammer_cursor_t cursor);
a89aec1b 801int hammer_ip_next(hammer_cursor_t cursor);
8cd0a023 802int hammer_ip_resolve_data(hammer_cursor_t cursor);
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803int hammer_ip_delete_record(hammer_cursor_t cursor, hammer_inode_t ip,
804 hammer_tid_t tid);
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805int hammer_delete_at_cursor(hammer_cursor_t cursor, int delete_flags,
806 int64_t *stat_bytes);
b3deaf57 807int hammer_ip_check_directory_empty(hammer_transaction_t trans,
98f7132d 808 hammer_inode_t ip);
fbc6e32a 809int hammer_sync_hmp(hammer_mount_t hmp, int waitfor);
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810int hammer_queue_inodes_flusher(hammer_mount_t hmp, int waitfor);
811
8cd0a023 812hammer_record_t
11ad5ade 813 hammer_alloc_mem_record(hammer_inode_t ip, int data_len);
d36ec43b 814void hammer_flush_record_done(hammer_record_t record, int error);
af209b0f 815void hammer_wait_mem_record_ident(hammer_record_t record, const char *ident);
b3deaf57 816void hammer_rel_mem_record(hammer_record_t record);
b84de5af 817
6a37e7e4 818int hammer_cursor_up(hammer_cursor_t cursor);
f36a9737 819int hammer_cursor_up_locked(hammer_cursor_t cursor);
8cd0a023 820int hammer_cursor_down(hammer_cursor_t cursor);
6a37e7e4 821int hammer_cursor_upgrade(hammer_cursor_t cursor);
7bc5b8c2 822int hammer_cursor_upgrade_node(hammer_cursor_t cursor);
6a37e7e4 823void hammer_cursor_downgrade(hammer_cursor_t cursor);
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824int hammer_cursor_seek(hammer_cursor_t cursor, hammer_node_t node,
825 int index);
af209b0f 826void hammer_lock_ex_ident(struct hammer_lock *lock, const char *ident);
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827int hammer_lock_ex_try(struct hammer_lock *lock);
828void hammer_lock_sh(struct hammer_lock *lock);
4a2796f3 829void hammer_lock_sh_lowpri(struct hammer_lock *lock);
47637bff 830int hammer_lock_sh_try(struct hammer_lock *lock);
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831int hammer_lock_upgrade(struct hammer_lock *lock);
832void hammer_lock_downgrade(struct hammer_lock *lock);
b3bad96f 833int hammer_lock_status(struct hammer_lock *lock);
427e5fc6 834void hammer_unlock(struct hammer_lock *lock);
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835void hammer_ref(struct hammer_lock *lock);
836void hammer_unref(struct hammer_lock *lock);
8cd0a023 837
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838void hammer_sync_lock_ex(hammer_transaction_t trans);
839void hammer_sync_lock_sh(hammer_transaction_t trans);
47637bff 840int hammer_sync_lock_sh_try(hammer_transaction_t trans);
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841void hammer_sync_unlock(hammer_transaction_t trans);
842
66325755 843u_int32_t hammer_to_unix_xid(uuid_t *uuid);
8cd0a023 844void hammer_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
ddfdf542
MD
845void hammer_time_to_timespec(u_int64_t xtime, struct timespec *ts);
846u_int64_t hammer_timespec_to_time(struct timespec *ts);
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847hammer_tid_t hammer_str_to_tid(const char *str, int *ispfs,
848 u_int32_t *localizationp);
5de0c0e5 849hammer_tid_t hammer_alloc_objid(hammer_mount_t hmp, hammer_inode_t dip);
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MD
850void hammer_clear_objid(hammer_inode_t dip);
851void hammer_destroy_objid_cache(hammer_mount_t hmp);
8cd0a023 852
e8599db1 853int hammer_enter_undo_history(hammer_mount_t hmp, hammer_off_t offset,
b3bad96f 854 int bytes);
e8599db1 855void hammer_clear_undo_history(hammer_mount_t hmp);
66325755 856enum vtype hammer_get_vnode_type(u_int8_t obj_type);
6b4f890b 857int hammer_get_dtype(u_int8_t obj_type);
66325755 858u_int8_t hammer_get_obj_type(enum vtype vtype);
5a930e66 859int64_t hammer_directory_namekey(const void *name, int len);
e63644f0 860int hammer_nohistory(hammer_inode_t ip);
427e5fc6 861
36f82b23 862int hammer_init_cursor(hammer_transaction_t trans, hammer_cursor_t cursor,
b3bad96f 863 hammer_node_cache_t cache, hammer_inode_t ip);
4e17f465 864void hammer_normalize_cursor(hammer_cursor_t cursor);
8cd0a023 865void hammer_done_cursor(hammer_cursor_t cursor);
b3bad96f 866int hammer_recover_cursor(hammer_cursor_t cursor);
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867void hammer_unlock_cursor(hammer_cursor_t cursor, int also_ip);
868int hammer_lock_cursor(hammer_cursor_t cursor, int also_ip);
869hammer_cursor_t hammer_push_cursor(hammer_cursor_t ocursor);
870void hammer_pop_cursor(hammer_cursor_t ocursor, hammer_cursor_t ncursor);
b3bad96f
MD
871
872void hammer_cursor_replaced_node(hammer_node_t onode, hammer_node_t nnode);
873void hammer_cursor_removed_node(hammer_node_t onode, hammer_node_t parent,
874 int index);
875void hammer_cursor_split_node(hammer_node_t onode, hammer_node_t nnode,
876 int index);
877void hammer_cursor_inserted_element(hammer_node_t node, int index);
878void hammer_cursor_deleted_element(hammer_node_t node, int index);
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879
880int hammer_btree_lookup(hammer_cursor_t cursor);
d26d0ae9 881int hammer_btree_first(hammer_cursor_t cursor);
32c90105 882int hammer_btree_last(hammer_cursor_t cursor);
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MD
883int hammer_btree_extract(hammer_cursor_t cursor, int flags);
884int hammer_btree_iterate(hammer_cursor_t cursor);
32c90105 885int hammer_btree_iterate_reverse(hammer_cursor_t cursor);
11ad5ade 886int hammer_btree_insert(hammer_cursor_t cursor,
602c6cb8 887 hammer_btree_leaf_elm_t elm, int *doprop);
8cd0a023 888int hammer_btree_delete(hammer_cursor_t cursor);
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889void hammer_btree_do_propagation(hammer_cursor_t cursor, hammer_inode_t ip,
890 hammer_btree_leaf_elm_t leaf);
8cd0a023 891int hammer_btree_cmp(hammer_base_elm_t key1, hammer_base_elm_t key2);
d26d0ae9 892int hammer_btree_chkts(hammer_tid_t ts, hammer_base_elm_t key);
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893int hammer_btree_correct_rhb(hammer_cursor_t cursor, hammer_tid_t tid);
894int hammer_btree_correct_lhb(hammer_cursor_t cursor, hammer_tid_t tid);
895
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896int btree_set_parent(hammer_transaction_t trans, hammer_node_t node,
897 hammer_btree_elm_t elm);
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898int hammer_btree_lock_children(hammer_cursor_t cursor,
899 struct hammer_node_locklist **locklistp);
2f85fa4d 900void hammer_btree_unlock_children(struct hammer_node_locklist **locklistp);
bcac4bbb 901int hammer_btree_search_node(hammer_base_elm_t elm, hammer_node_ondisk_t node);
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902hammer_node_t hammer_btree_get_parent(hammer_node_t node, int *parent_indexp,
903 int *errorp, int try_exclusive);
b33e2cc0 904
c0ade690
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905void hammer_print_btree_node(hammer_node_ondisk_t ondisk);
906void hammer_print_btree_elm(hammer_btree_elm_t elm, u_int8_t type, int i);
8750964d 907
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908void *hammer_bread(struct hammer_mount *hmp, hammer_off_t off,
909 int *errorp, struct hammer_buffer **bufferp);
910void *hammer_bnew(struct hammer_mount *hmp, hammer_off_t off,
911 int *errorp, struct hammer_buffer **bufferp);
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912void *hammer_bread_ext(struct hammer_mount *hmp, hammer_off_t off, int bytes,
913 int *errorp, struct hammer_buffer **bufferp);
914void *hammer_bnew_ext(struct hammer_mount *hmp, hammer_off_t off, int bytes,
915 int *errorp, struct hammer_buffer **bufferp);
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916
917hammer_volume_t hammer_get_root_volume(hammer_mount_t hmp, int *errorp);
427e5fc6 918
8cd0a023 919hammer_volume_t hammer_get_volume(hammer_mount_t hmp,
427e5fc6 920 int32_t vol_no, int *errorp);
4a2796f3
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921hammer_buffer_t hammer_get_buffer(hammer_mount_t hmp, hammer_off_t buf_offset,
922 int bytes, int isnew, int *errorp);
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MD
923void hammer_del_buffers(hammer_mount_t hmp, hammer_off_t base_offset,
924 hammer_off_t zone2_offset, int bytes);
8cd0a023 925
fbc6e32a 926int hammer_ref_volume(hammer_volume_t volume);
8cd0a023
MD
927int hammer_ref_buffer(hammer_buffer_t buffer);
928void hammer_flush_buffer_nodes(hammer_buffer_t buffer);
929
8cd0a023 930void hammer_rel_volume(hammer_volume_t volume, int flush);
8cd0a023
MD
931void hammer_rel_buffer(hammer_buffer_t buffer, int flush);
932
513ca7d7
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933int hammer_vfs_export(struct mount *mp, int op,
934 const struct export_args *export);
19619882
MD
935hammer_node_t hammer_get_node(hammer_mount_t hmp, hammer_off_t node_offset,
936 int isnew, int *errorp);
740d8317 937void hammer_ref_node(hammer_node_t node);
055f5ff8 938hammer_node_t hammer_ref_node_safe(struct hammer_mount *hmp,
bcac4bbb 939 hammer_node_cache_t cache, int *errorp);
8cd0a023 940void hammer_rel_node(hammer_node_t node);
36f82b23
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941void hammer_delete_node(hammer_transaction_t trans,
942 hammer_node_t node);
bcac4bbb
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943void hammer_cache_node(hammer_node_cache_t cache,
944 hammer_node_t node);
945void hammer_uncache_node(hammer_node_cache_t cache);
8cd0a023
MD
946void hammer_flush_node(hammer_node_t node);
947
427e5fc6
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948void hammer_dup_buffer(struct hammer_buffer **bufferp,
949 struct hammer_buffer *buffer);
36f82b23 950hammer_node_t hammer_alloc_btree(hammer_transaction_t trans, int *errorp);
36f82b23 951void *hammer_alloc_data(hammer_transaction_t trans, int32_t data_len,
bf3b416b 952 u_int16_t rec_type, hammer_off_t *data_offsetp,
bf686dbe
MD
953 struct hammer_buffer **data_bufferp, int *errorp);
954
059819e3
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955int hammer_generate_undo(hammer_transaction_t trans, hammer_io_t io,
956 hammer_off_t zone1_offset, void *base, int len);
427e5fc6 957
66325755 958void hammer_put_volume(struct hammer_volume *volume, int flush);
66325755 959void hammer_put_buffer(struct hammer_buffer *buffer, int flush);
427e5fc6 960
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961hammer_off_t hammer_freemap_alloc(hammer_transaction_t trans,
962 hammer_off_t owner, int *errorp);
963void hammer_freemap_free(hammer_transaction_t trans, hammer_off_t phys_offset,
c3be93f2 964 hammer_off_t owner, int *errorp);
a7e9bef1 965int hammer_checkspace(hammer_mount_t hmp, int slop);
36f82b23 966hammer_off_t hammer_blockmap_alloc(hammer_transaction_t trans, int zone,
40043e7f 967 int bytes, int *errorp);
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MD
968hammer_reserve_t hammer_blockmap_reserve(hammer_mount_t hmp, int zone,
969 int bytes, hammer_off_t *zone_offp, int *errorp);
970void hammer_blockmap_reserve_complete(hammer_mount_t hmp,
971 hammer_reserve_t resv);
cb51be26 972void hammer_reserve_clrdelay(hammer_mount_t hmp, hammer_reserve_t resv);
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973void hammer_blockmap_free(hammer_transaction_t trans,
974 hammer_off_t bmap_off, int bytes);
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975void hammer_blockmap_finalize(hammer_transaction_t trans,
976 hammer_off_t bmap_off, int bytes);
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977int hammer_blockmap_getfree(hammer_mount_t hmp, hammer_off_t bmap_off,
978 int *curp, int *errorp);
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979hammer_off_t hammer_blockmap_lookup(hammer_mount_t hmp, hammer_off_t bmap_off,
980 int *errorp);
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981hammer_off_t hammer_undo_lookup(hammer_mount_t hmp, hammer_off_t bmap_off,
982 int *errorp);
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983int64_t hammer_undo_used(hammer_transaction_t trans);
984int64_t hammer_undo_space(hammer_transaction_t trans);
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985int64_t hammer_undo_max(hammer_mount_t hmp);
986
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987void hammer_start_transaction(struct hammer_transaction *trans,
988 struct hammer_mount *hmp);
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989void hammer_simple_transaction(struct hammer_transaction *trans,
990 struct hammer_mount *hmp);
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991void hammer_start_transaction_fls(struct hammer_transaction *trans,
992 struct hammer_mount *hmp);
993void hammer_done_transaction(struct hammer_transaction *trans);
66325755 994
47637bff 995void hammer_modify_inode(hammer_inode_t ip, int flags);
f90dde4c 996void hammer_flush_inode(hammer_inode_t ip, int flags);
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997void hammer_flush_inode_done(hammer_inode_t ip);
998void hammer_wait_inode(hammer_inode_t ip);
999
8cd0a023
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1000int hammer_create_inode(struct hammer_transaction *trans, struct vattr *vap,
1001 struct ucred *cred, struct hammer_inode *dip,
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1002 hammer_pseudofs_inmem_t pfsm,
1003 struct hammer_inode **ipp);
a89aec1b 1004void hammer_rel_inode(hammer_inode_t ip, int flush);
51c35492 1005int hammer_reload_inode(hammer_inode_t ip, void *arg __unused);
af209b0f 1006int hammer_ino_rb_compare(hammer_inode_t ip1, hammer_inode_t ip2);
51c35492 1007
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1008int hammer_sync_inode(hammer_inode_t ip);
1009void hammer_test_inode(hammer_inode_t ip);
e8599db1 1010void hammer_inode_unloadable_check(hammer_inode_t ip, int getvp);
8cd0a023 1011
a89aec1b 1012int hammer_ip_add_directory(struct hammer_transaction *trans,
5a930e66 1013 hammer_inode_t dip, const char *name, int bytes,
8cd0a023 1014 hammer_inode_t nip);
a89aec1b 1015int hammer_ip_del_directory(struct hammer_transaction *trans,
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1016 hammer_cursor_t cursor, hammer_inode_t dip,
1017 hammer_inode_t ip);
47637bff 1018hammer_record_t hammer_ip_add_bulk(hammer_inode_t ip, off_t file_offset,
0832c9bb 1019 void *data, int bytes, int *errorp);
47637bff 1020int hammer_ip_frontend_trunc(struct hammer_inode *ip, off_t file_size);
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1021int hammer_ip_add_record(struct hammer_transaction *trans,
1022 hammer_record_t record);
4e17f465 1023int hammer_ip_delete_range(hammer_cursor_t cursor, hammer_inode_t ip,
47637bff 1024 int64_t ran_beg, int64_t ran_end, int truncating);
a9d52b76 1025int hammer_ip_delete_clean(hammer_cursor_t cursor, hammer_inode_t ip,
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1026 int *countp);
1027int hammer_ip_sync_data(hammer_cursor_t cursor, hammer_inode_t ip,
1028 int64_t offset, void *data, int bytes);
36f82b23 1029int hammer_ip_sync_record(hammer_transaction_t trans, hammer_record_t rec);
4e17f465 1030int hammer_ip_sync_record_cursor(hammer_cursor_t cursor, hammer_record_t rec);
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1031hammer_pseudofs_inmem_t hammer_load_pseudofs(hammer_transaction_t trans,
1032 u_int32_t localization, int *errorp);
1033int hammer_mkroot_pseudofs(hammer_transaction_t trans, struct ucred *cred,
1034 hammer_pseudofs_inmem_t pfsm);
1035int hammer_save_pseudofs(hammer_transaction_t trans,
1036 hammer_pseudofs_inmem_t pfsm);
5fa5c92f 1037void hammer_rel_pseudofs(hammer_mount_t hmp, hammer_pseudofs_inmem_t pfsm);
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1038int hammer_ioctl(hammer_inode_t ip, u_long com, caddr_t data, int fflag,
1039 struct ucred *cred);
1040
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1041void hammer_io_init(hammer_io_t io, hammer_mount_t hmp,
1042 enum hammer_io_type type);
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1043int hammer_io_read(struct vnode *devvp, struct hammer_io *io,
1044 hammer_off_t limit);
66325755 1045int hammer_io_new(struct vnode *devvp, struct hammer_io *io);
47637bff 1046void hammer_io_inval(hammer_volume_t volume, hammer_off_t zone2_offset);
ecca949a 1047struct buf *hammer_io_release(struct hammer_io *io, int flush);
055f5ff8 1048void hammer_io_flush(struct hammer_io *io);
055f5ff8 1049void hammer_io_waitdep(struct hammer_io *io);
af209b0f 1050void hammer_io_wait_all(hammer_mount_t hmp, const char *ident);
4a2796f3 1051int hammer_io_direct_read(hammer_mount_t hmp, struct bio *bio);
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1052int hammer_io_direct_write(hammer_mount_t hmp, hammer_btree_leaf_elm_t leaf,
1053 struct bio *bio);
43c665ae 1054void hammer_io_direct_uncache(hammer_mount_t hmp, hammer_btree_leaf_elm_t leaf);
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1055void hammer_io_write_interlock(hammer_io_t io);
1056void hammer_io_done_interlock(hammer_io_t io);
4a2796f3 1057void hammer_io_clear_modify(struct hammer_io *io, int inval);
cebe9493 1058void hammer_io_clear_modlist(struct hammer_io *io);
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1059void hammer_modify_volume(hammer_transaction_t trans, hammer_volume_t volume,
1060 void *base, int len);
1061void hammer_modify_buffer(hammer_transaction_t trans, hammer_buffer_t buffer,
1062 void *base, int len);
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1063void hammer_modify_volume_done(hammer_volume_t volume);
1064void hammer_modify_buffer_done(hammer_buffer_t buffer);
0b075555 1065
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1066int hammer_ioc_reblock(hammer_transaction_t trans, hammer_inode_t ip,
1067 struct hammer_ioc_reblock *reblock);
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1068int hammer_ioc_prune(hammer_transaction_t trans, hammer_inode_t ip,
1069 struct hammer_ioc_prune *prune);
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1070int hammer_ioc_mirror_read(hammer_transaction_t trans, hammer_inode_t ip,
1071 struct hammer_ioc_mirror_rw *mirror);
1072int hammer_ioc_mirror_write(hammer_transaction_t trans, hammer_inode_t ip,
1073 struct hammer_ioc_mirror_rw *mirror);
5fa5c92f 1074int hammer_ioc_set_pseudofs(hammer_transaction_t trans, hammer_inode_t ip,
ea434b6f 1075 struct ucred *cred, struct hammer_ioc_pseudofs_rw *pfs);
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1076int hammer_ioc_get_pseudofs(hammer_transaction_t trans, hammer_inode_t ip,
1077 struct hammer_ioc_pseudofs_rw *pfs);
bf686dbe 1078
855942b6 1079int hammer_signal_check(hammer_mount_t hmp);
bf686dbe 1080
059819e3
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1081void hammer_flusher_create(hammer_mount_t hmp);
1082void hammer_flusher_destroy(hammer_mount_t hmp);
1083void hammer_flusher_sync(hammer_mount_t hmp);
1084void hammer_flusher_async(hammer_mount_t hmp);
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1085int hammer_flusher_meta_limit(hammer_mount_t hmp);
1086int hammer_flusher_undo_exhausted(hammer_transaction_t trans, int quarter);
525aad3a 1087void hammer_flusher_clean_loose_ios(hammer_mount_t hmp);
059819e3 1088
f90dde4c 1089int hammer_recover(hammer_mount_t hmp, hammer_volume_t rootvol);
51c35492 1090void hammer_recover_flush_buffers(hammer_mount_t hmp,
06ad81ff 1091 hammer_volume_t root_volume, int final);
f90dde4c 1092
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1093void hammer_crc_set_blockmap(hammer_blockmap_t blockmap);
1094void hammer_crc_set_volume(hammer_volume_ondisk_t ondisk);
ddfdf542 1095void hammer_crc_set_leaf(void *data, hammer_btree_leaf_elm_t leaf);
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1096
1097int hammer_crc_test_blockmap(hammer_blockmap_t blockmap);
1098int hammer_crc_test_volume(hammer_volume_ondisk_t ondisk);
19619882 1099int hammer_crc_test_btree(hammer_node_ondisk_t ondisk);
ddfdf542 1100int hammer_crc_test_leaf(void *data, hammer_btree_leaf_elm_t leaf);
77062c8a 1101void hkprintf(const char *ctl, ...);
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1102udev_t hammer_fsid_to_udev(uuid_t *uuid);
1103
19619882 1104
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1105int hammer_blocksize(int64_t file_offset);
1106int64_t hammer_blockdemarc(int64_t file_offset1, int64_t file_offset2);
1107
055f5ff8 1108#endif
427e5fc6 1109
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1110static __inline void
1111hammer_wait_mem_record(hammer_record_t record)
1112{
1113 hammer_wait_mem_record_ident(record, "hmmwai");
1114}
1115
1116static __inline void
1117hammer_lock_ex(struct hammer_lock *lock)
1118{
1119 hammer_lock_ex_ident(lock, "hmrlck");
1120}
1121
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1122/*
1123 * Indicate that a B-Tree node is being modified.
1124 */
8cd0a023 1125static __inline void
36f82b23 1126hammer_modify_node_noundo(hammer_transaction_t trans, hammer_node_t node)
bf686dbe 1127{
36f82b23 1128 hammer_modify_buffer(trans, node->buffer, NULL, 0);
bf686dbe
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1129}
1130
1131static __inline void
36f82b23 1132hammer_modify_node_all(hammer_transaction_t trans, struct hammer_node *node)
8cd0a023 1133{
36f82b23
MD
1134 hammer_modify_buffer(trans, node->buffer,
1135 node->ondisk, sizeof(*node->ondisk));
427e5fc6
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1136}
1137
bf686dbe 1138static __inline void
36f82b23
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1139hammer_modify_node(hammer_transaction_t trans, hammer_node_t node,
1140 void *base, int len)
bf686dbe 1141{
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MD
1142 hammer_crc_t *crcptr;
1143
bf686dbe
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1144 KKASSERT((char *)base >= (char *)node->ondisk &&
1145 (char *)base + len <=
1146 (char *)node->ondisk + sizeof(*node->ondisk));
36f82b23 1147 hammer_modify_buffer(trans, node->buffer, base, len);
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MD
1148 crcptr = &node->ondisk->crc;
1149 hammer_modify_buffer(trans, node->buffer, crcptr, sizeof(hammer_crc_t));
1150 --node->buffer->io.modify_refs; /* only want one ref */
bf686dbe
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1151}
1152
bcac4bbb
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1153/*
1154 * Indicate that the specified modifications have been completed.
1155 *
1156 * Do not try to generate the crc here, it's very expensive to do and a
1157 * sequence of insertions or deletions can result in many calls to this
1158 * function on the same node.
1159 */
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1160static __inline void
1161hammer_modify_node_done(hammer_node_t node)
1162{
bcac4bbb
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1163 node->flags |= HAMMER_NODE_CRCGOOD;
1164 if ((node->flags & HAMMER_NODE_NEEDSCRC) == 0) {
1165 node->flags |= HAMMER_NODE_NEEDSCRC;
1166 node->buffer->io.gencrc = 1;
1167 hammer_ref_node(node);
1168 }
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1169 hammer_modify_buffer_done(node->buffer);
1170}
1171
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1172#define hammer_modify_volume_field(trans, vol, field) \
1173 hammer_modify_volume(trans, vol, &(vol)->ondisk->field, \
1174 sizeof((vol)->ondisk->field))
1175
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1176#define hammer_modify_node_field(trans, node, field) \
1177 hammer_modify_node(trans, node, &(node)->ondisk->field, \
1178 sizeof((node)->ondisk->field))
1179