2 * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
34 * $DragonFly: src/sys/vfs/hammer/hammer.h,v 1.93 2008/06/26 04:06:22 dillon Exp $
37 * This header file contains structures used internally by the HAMMERFS
38 * implementation. See hammer_disk.h for on-disk structures.
41 #include <sys/param.h>
42 #include <sys/types.h>
43 #include <sys/kernel.h>
45 #include <sys/systm.h>
47 #include <sys/malloc.h>
48 #include <sys/mount.h>
49 #include <sys/mountctl.h>
50 #include <sys/vnode.h>
53 #include <sys/globaldata.h>
54 #include <sys/lockf.h>
56 #include <sys/queue.h>
58 #include <sys/globaldata.h>
61 #include <sys/signal2.h>
62 #include "hammer_disk.h"
63 #include "hammer_mount.h"
64 #include "hammer_ioctl.h"
66 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
68 MALLOC_DECLARE(M_HAMMER
);
73 #if !defined(KTR_HAMMER)
74 #define KTR_HAMMER KTR_ALL
76 KTR_INFO_MASTER_EXTERN(hammer
);
84 * Key structure used for custom RB tree inode lookups. This prototypes
85 * the function hammer_ino_rb_tree_RB_LOOKUP_INFO(root, info).
87 typedef struct hammer_inode_info
{
88 int64_t obj_id
; /* (key) object identifier */
89 hammer_tid_t obj_asof
; /* (key) snapshot transid or 0 */
90 u_int32_t obj_localization
; /* (key) pseudo-fs */
92 struct hammer_btree_leaf_elm
*leaf
;
94 } *hammer_inode_info_t
;
96 typedef enum hammer_transaction_type
{
100 } hammer_transaction_type_t
;
103 * HAMMER Transaction tracking
105 struct hammer_transaction
{
106 hammer_transaction_type_t type
;
107 struct hammer_mount
*hmp
;
112 struct hammer_volume
*rootvol
;
115 typedef struct hammer_transaction
*hammer_transaction_t
;
121 int refs
; /* active references delay writes */
122 int lockcount
; /* lock count for exclusive/shared access */
124 int exwanted
; /* number of threads waiting for ex lock */
125 struct thread
*locktd
;
129 hammer_islocked(struct hammer_lock
*lock
)
131 return(lock
->lockcount
!= 0);
135 hammer_isactive(struct hammer_lock
*lock
)
137 return(lock
->refs
!= 0);
141 hammer_islastref(struct hammer_lock
*lock
)
143 return(lock
->refs
== 1);
147 * Return if we specifically own the lock exclusively.
150 hammer_lock_excl_owned(struct hammer_lock
*lock
, thread_t td
)
152 if (lock
->lockcount
> 0 && lock
->locktd
== td
)
158 * Flush state, used by various structures
160 typedef enum hammer_inode_state
{
164 } hammer_inode_state_t
;
166 TAILQ_HEAD(hammer_record_list
, hammer_record
);
169 * Cache object ids. A fixed number of objid cache structures are
170 * created to reserve object id's for newly created files in multiples
171 * of 100,000, localized to a particular directory, and recycled as
172 * needed. This allows parallel create operations in different
173 * directories to retain fairly localized object ids which in turn
174 * improves reblocking performance and layout.
176 #define OBJID_CACHE_SIZE 1024
177 #define OBJID_CACHE_BULK 100000
179 typedef struct hammer_objid_cache
{
180 TAILQ_ENTRY(hammer_objid_cache
) entry
;
181 struct hammer_inode
*dip
;
182 hammer_tid_t next_tid
;
184 } *hammer_objid_cache_t
;
187 * Associate an inode with a B-Tree node to cache search start positions
189 typedef struct hammer_node_cache
{
190 TAILQ_ENTRY(hammer_node_cache
) entry
;
191 struct hammer_node
*node
;
192 struct hammer_inode
*ip
;
193 } *hammer_node_cache_t
;
195 TAILQ_HEAD(hammer_node_cache_list
, hammer_node_cache
);
198 * Structure used to represent an inode in-memory.
200 * The record and data associated with an inode may be out of sync with
201 * the disk (xDIRTY flags), or not even on the disk at all (ONDISK flag
204 * An inode may also hold a cache of unsynchronized records, used for
205 * database and directories only. Unsynchronized regular file data is
206 * stored in the buffer cache.
208 * NOTE: A file which is created and destroyed within the initial
209 * synchronization period can wind up not doing any disk I/O at all.
211 * Finally, an inode may cache numerous disk-referencing B-Tree cursors.
213 struct hammer_ino_rb_tree
;
215 RB_HEAD(hammer_ino_rb_tree
, hammer_inode
);
216 RB_PROTOTYPEX(hammer_ino_rb_tree
, INFO
, hammer_inode
, rb_node
,
217 hammer_ino_rb_compare
, hammer_inode_info_t
);
219 struct hammer_rec_rb_tree
;
220 struct hammer_record
;
221 RB_HEAD(hammer_rec_rb_tree
, hammer_record
);
222 RB_PROTOTYPEX(hammer_rec_rb_tree
, INFO
, hammer_record
, rb_node
,
223 hammer_rec_rb_compare
, hammer_btree_leaf_elm_t
);
225 TAILQ_HEAD(hammer_node_list
, hammer_node
);
227 struct hammer_inode
{
228 RB_ENTRY(hammer_inode
) rb_node
;
229 hammer_inode_state_t flush_state
;
231 TAILQ_ENTRY(hammer_inode
) flush_entry
;
232 struct hammer_record_list target_list
; /* target of dependant recs */
233 u_int64_t obj_id
; /* (key) object identifier */
234 hammer_tid_t obj_asof
; /* (key) snapshot or 0 */
235 u_int32_t obj_localization
; /* (key) pseudo-fs */
236 struct hammer_mount
*hmp
;
237 hammer_objid_cache_t objid_cache
;
239 int error
; /* flush error */
240 int cursor_ip_refs
; /* sanity */
244 struct lockf advlock
;
245 struct hammer_lock lock
; /* sync copy interlock */
247 struct hammer_btree_leaf_elm ino_leaf
; /* in-memory cache */
248 struct hammer_inode_data ino_data
; /* in-memory cache */
249 struct hammer_rec_rb_tree rec_tree
; /* in-memory cache */
250 struct hammer_node_cache cache
[2]; /* search initiate cache */
253 * When a demark is created to synchronize an inode to
254 * disk, certain fields are copied so the front-end VOPs
255 * can continue to run in parallel with the synchronization
256 * occuring in the background.
258 int sync_flags
; /* to-sync flags cache */
259 off_t sync_trunc_off
; /* to-sync truncation */
260 struct hammer_btree_leaf_elm sync_ino_leaf
; /* to-sync cache */
261 struct hammer_inode_data sync_ino_data
; /* to-sync cache */
264 typedef struct hammer_inode
*hammer_inode_t
;
266 #define VTOI(vp) ((struct hammer_inode *)(vp)->v_data)
268 #define HAMMER_INODE_DDIRTY 0x0001 /* in-memory ino_data is dirty */
269 /* (not including atime/mtime) */
270 #define HAMMER_INODE_RSV_INODES 0x0002 /* hmp->rsv_inodes bumped */
271 #define HAMMER_INODE_UNUSED0004 0x0004
272 #define HAMMER_INODE_XDIRTY 0x0008 /* in-memory records */
273 #define HAMMER_INODE_ONDISK 0x0010 /* inode is on-disk (else not yet) */
274 #define HAMMER_INODE_FLUSH 0x0020 /* flush on last ref */
275 #define HAMMER_INODE_DELETED 0x0080 /* inode delete (backend) */
276 #define HAMMER_INODE_DELONDISK 0x0100 /* delete synchronized to disk */
277 #define HAMMER_INODE_RO 0x0200 /* read-only (because of as-of) */
278 #define HAMMER_INODE_VHELD 0x0400 /* vnode held on sync */
279 #define HAMMER_INODE_DONDISK 0x0800 /* data records may be on disk */
280 #define HAMMER_INODE_BUFS 0x1000 /* dirty high level bps present */
281 #define HAMMER_INODE_REFLUSH 0x2000 /* pipelined flush during flush */
282 #define HAMMER_INODE_RECLAIM 0x4000 /* trying to reclaim */
283 #define HAMMER_INODE_FLUSHW 0x8000 /* Someone waiting for flush */
285 #define HAMMER_INODE_TRUNCATED 0x00010000
286 #define HAMMER_INODE_DELETING 0x00020000 /* inode delete request (frontend)*/
287 #define HAMMER_INODE_RESIGNAL 0x00040000 /* re-signal on re-flush */
288 #define HAMMER_INODE_ATIME 0x00100000 /* in-memory atime modified */
289 #define HAMMER_INODE_MTIME 0x00100000 /* in-memory mtime modified */
291 #define HAMMER_INODE_MODMASK (HAMMER_INODE_DDIRTY| \
292 HAMMER_INODE_XDIRTY|HAMMER_INODE_BUFS| \
293 HAMMER_INODE_ATIME|HAMMER_INODE_MTIME| \
294 HAMMER_INODE_TRUNCATED|HAMMER_INODE_DELETING)
296 #define HAMMER_INODE_MODMASK_NOXDIRTY \
297 (HAMMER_INODE_MODMASK & ~HAMMER_INODE_XDIRTY)
299 #define HAMMER_FLUSH_GROUP_SIZE 64
301 #define HAMMER_FLUSH_SIGNAL 0x0001
302 #define HAMMER_FLUSH_RECURSION 0x0002
305 * Used by the inode reclaim code to pipeline reclaims and avoid
306 * blowing out kernel memory or letting the flusher get too far
309 struct hammer_reclaim
{
310 TAILQ_ENTRY(hammer_reclaim
) entry
;
314 #define HAMMER_RECLAIM_FLUSH 2000
315 #define HAMMER_RECLAIM_WAIT 4000
318 * Structure used to represent an unsynchronized record in-memory. These
319 * records typically represent directory entries. Only non-historical
320 * records are kept in-memory.
322 * Records are organized as a per-inode RB-Tree. If the inode is not
323 * on disk then neither are any records and the in-memory record tree
324 * represents the entire contents of the inode. If the inode is on disk
325 * then the on-disk B-Tree is scanned in parallel with the in-memory
326 * RB-Tree to synthesize the current state of the file.
328 * Records are also used to enforce the ordering of directory create/delete
329 * operations. A new inode will not be flushed to disk unless its related
330 * directory entry is also being flushed at the same time. A directory entry
331 * will not be removed unless its related inode is also being removed at the
334 typedef enum hammer_record_type
{
335 HAMMER_MEM_RECORD_GENERAL
, /* misc record */
336 HAMMER_MEM_RECORD_INODE
, /* inode record */
337 HAMMER_MEM_RECORD_ADD
, /* positive memory cache record */
338 HAMMER_MEM_RECORD_DEL
, /* negative delete-on-disk record */
339 HAMMER_MEM_RECORD_DATA
/* bulk-data record w/on-disk ref */
340 } hammer_record_type_t
;
342 struct hammer_record
{
343 RB_ENTRY(hammer_record
) rb_node
;
344 TAILQ_ENTRY(hammer_record
) target_entry
;
345 hammer_inode_state_t flush_state
;
347 hammer_record_type_t type
;
348 struct hammer_lock lock
;
349 struct hammer_reserve
*resv
;
350 struct hammer_inode
*ip
;
351 struct hammer_inode
*target_ip
;
352 struct hammer_btree_leaf_elm leaf
;
353 union hammer_data_ondisk
*data
;
357 typedef struct hammer_record
*hammer_record_t
;
360 * Record flags. Note that FE can only be set by the frontend if the
361 * record has not been interlocked by the backend w/ BE.
363 #define HAMMER_RECF_ALLOCDATA 0x0001
364 #define HAMMER_RECF_ONRBTREE 0x0002
365 #define HAMMER_RECF_DELETED_FE 0x0004 /* deleted (frontend) */
366 #define HAMMER_RECF_DELETED_BE 0x0008 /* deleted (backend) */
367 #define HAMMER_RECF_UNUSED0010 0x0010
368 #define HAMMER_RECF_INTERLOCK_BE 0x0020 /* backend interlock */
369 #define HAMMER_RECF_WANTED 0x0040 /* wanted by the frontend */
370 #define HAMMER_RECF_CONVERT_DELETE 0x0100 /* special case */
373 * In-memory structures representing on-disk structures.
375 struct hammer_volume
;
376 struct hammer_buffer
;
379 struct hammer_reserve
;
381 RB_HEAD(hammer_vol_rb_tree
, hammer_volume
);
382 RB_HEAD(hammer_buf_rb_tree
, hammer_buffer
);
383 RB_HEAD(hammer_nod_rb_tree
, hammer_node
);
384 RB_HEAD(hammer_und_rb_tree
, hammer_undo
);
385 RB_HEAD(hammer_res_rb_tree
, hammer_reserve
);
387 RB_PROTOTYPE2(hammer_vol_rb_tree
, hammer_volume
, rb_node
,
388 hammer_vol_rb_compare
, int32_t);
389 RB_PROTOTYPE2(hammer_buf_rb_tree
, hammer_buffer
, rb_node
,
390 hammer_buf_rb_compare
, hammer_off_t
);
391 RB_PROTOTYPE2(hammer_nod_rb_tree
, hammer_node
, rb_node
,
392 hammer_nod_rb_compare
, hammer_off_t
);
393 RB_PROTOTYPE2(hammer_und_rb_tree
, hammer_undo
, rb_node
,
394 hammer_und_rb_compare
, hammer_off_t
);
395 RB_PROTOTYPE2(hammer_res_rb_tree
, hammer_reserve
, rb_node
,
396 hammer_res_rb_compare
, hammer_off_t
);
399 * IO management - embedded at the head of various in-memory structures
401 * VOLUME - hammer_volume containing meta-data
402 * META_BUFFER - hammer_buffer containing meta-data
403 * DATA_BUFFER - hammer_buffer containing pure-data
405 * Dirty volume headers and dirty meta-data buffers are locked until the
406 * flusher can sequence them out. Dirty pure-data buffers can be written.
407 * Clean buffers can be passively released.
409 typedef enum hammer_io_type
{
410 HAMMER_STRUCTURE_VOLUME
,
411 HAMMER_STRUCTURE_META_BUFFER
,
412 HAMMER_STRUCTURE_UNDO_BUFFER
,
413 HAMMER_STRUCTURE_DATA_BUFFER
416 union hammer_io_structure
;
420 LIST_ENTRY(worklist
) node
;
423 TAILQ_HEAD(hammer_io_list
, hammer_io
);
424 typedef struct hammer_io_list
*hammer_io_list_t
;
427 struct worklist worklist
;
428 struct hammer_lock lock
;
429 enum hammer_io_type type
;
430 struct hammer_mount
*hmp
;
431 TAILQ_ENTRY(hammer_io
) mod_entry
; /* list entry if modified */
432 hammer_io_list_t mod_list
;
434 int64_t offset
; /* zone-2 offset */
435 int bytes
; /* buffer cache buffer size */
436 int loading
; /* loading/unloading interlock */
439 u_int modified
: 1; /* bp's data was modified */
440 u_int released
: 1; /* bp released (w/ B_LOCKED set) */
441 u_int running
: 1; /* bp write IO in progress */
442 u_int waiting
: 1; /* someone is waiting on us */
443 u_int validated
: 1; /* ondisk has been validated */
444 u_int waitdep
: 1; /* flush waits for dependancies */
445 u_int recovered
: 1; /* has recovery ref */
446 u_int waitmod
: 1; /* waiting for modify_refs */
447 u_int reclaim
: 1; /* reclaim requested */
448 u_int gencrc
: 1; /* crc needs to be generated */
451 typedef struct hammer_io
*hammer_io_t
;
453 #define HAMMER_CLUSTER_SIZE (64 * 1024)
454 #if HAMMER_CLUSTER_SIZE > MAXBSIZE
455 #undef HAMMER_CLUSTER_SIZE
456 #define HAMMER_CLUSTER_SIZE MAXBSIZE
458 #define HAMMER_CLUSTER_BUFS (HAMMER_CLUSTER_SIZE / HAMMER_BUFSIZE)
461 * In-memory volume representing on-disk buffer
463 struct hammer_volume
{
465 RB_ENTRY(hammer_volume
) rb_node
;
466 struct hammer_volume_ondisk
*ondisk
;
468 int64_t nblocks
; /* note: special calculation for statfs */
469 int64_t buffer_base
; /* base offset of buffer 0 */
470 hammer_off_t maxbuf_off
; /* Maximum buffer offset (zone-2) */
471 hammer_off_t maxraw_off
; /* Maximum raw offset for device */
477 typedef struct hammer_volume
*hammer_volume_t
;
480 * In-memory buffer (other then volume, super-cluster, or cluster),
481 * representing an on-disk buffer.
483 struct hammer_buffer
{
485 RB_ENTRY(hammer_buffer
) rb_node
;
487 struct hammer_volume
*volume
;
488 hammer_off_t zoneX_offset
;
489 hammer_off_t zone2_offset
;
490 struct hammer_reserve
*resv
;
491 struct hammer_node_list clist
;
494 typedef struct hammer_buffer
*hammer_buffer_t
;
497 * In-memory B-Tree node, representing an on-disk B-Tree node.
499 * This is a hang-on structure which is backed by a hammer_buffer,
500 * indexed by a hammer_cluster, and used for fine-grained locking of
501 * B-Tree nodes in order to properly control lock ordering. A hammer_buffer
502 * can contain multiple nodes representing wildly disassociated portions
503 * of the B-Tree so locking cannot be done on a buffer-by-buffer basis.
505 * This structure uses a cluster-relative index to reduce the number
506 * of layers required to access it, and also because all on-disk B-Tree
507 * references are cluster-relative offsets.
510 struct hammer_lock lock
; /* node-by-node lock */
511 TAILQ_ENTRY(hammer_node
) entry
; /* per-buffer linkage */
512 RB_ENTRY(hammer_node
) rb_node
; /* per-cluster linkage */
513 hammer_off_t node_offset
; /* full offset spec */
514 struct hammer_mount
*hmp
;
515 struct hammer_buffer
*buffer
; /* backing buffer */
516 hammer_node_ondisk_t ondisk
; /* ptr to on-disk structure */
517 struct hammer_node_cache_list cache_list
; /* passive caches */
519 int loading
; /* load interlock */
522 #define HAMMER_NODE_DELETED 0x0001
523 #define HAMMER_NODE_FLUSH 0x0002
524 #define HAMMER_NODE_CRCGOOD 0x0004
525 #define HAMMER_NODE_NEEDSCRC 0x0008
526 #define HAMMER_NODE_NEEDSMIRROR 0x0010
528 typedef struct hammer_node
*hammer_node_t
;
531 * List of locked nodes.
533 struct hammer_node_locklist
{
534 struct hammer_node_locklist
*next
;
538 typedef struct hammer_node_locklist
*hammer_node_locklist_t
;
542 * Common I/O management structure - embedded in in-memory structures
543 * which are backed by filesystem buffers.
545 union hammer_io_structure
{
547 struct hammer_volume volume
;
548 struct hammer_buffer buffer
;
551 typedef union hammer_io_structure
*hammer_io_structure_t
;
554 * The reserve structure prevents the blockmap from allocating
555 * out of a reserved bigblock. Such reservations are used by
556 * the direct-write mechanism.
558 * The structure is also used to hold off on reallocations of
559 * big blocks from the freemap until flush dependancies have
562 struct hammer_reserve
{
563 RB_ENTRY(hammer_reserve
) rb_node
;
564 TAILQ_ENTRY(hammer_reserve
) delay_entry
;
569 hammer_off_t zone_offset
;
572 typedef struct hammer_reserve
*hammer_reserve_t
;
574 #define HAMMER_RESF_ONDELAY 0x0001
576 #include "hammer_cursor.h"
579 * The undo structure tracks recent undos to avoid laying down duplicate
580 * undos within a flush group, saving us a significant amount of overhead.
582 * This is strictly a heuristic.
584 #define HAMMER_MAX_UNDOS 1024
585 #define HAMMER_MAX_FLUSHERS 4
588 RB_ENTRY(hammer_undo
) rb_node
;
589 TAILQ_ENTRY(hammer_undo
) lru_entry
;
594 typedef struct hammer_undo
*hammer_undo_t
;
596 struct hammer_flusher_info
;
598 struct hammer_flusher
{
599 int signal
; /* flusher thread sequencer */
600 int act
; /* currently active flush group */
601 int done
; /* set to act when complete */
602 int next
; /* next flush group */
603 int group_lock
; /* lock sequencing of the next flush */
604 int exiting
; /* request master exit */
605 int count
; /* number of slave flushers */
606 int running
; /* number of slave flushers running */
607 thread_t td
; /* master flusher thread */
608 hammer_tid_t tid
; /* last flushed transaction id */
609 int finalize_want
; /* serialize finalization */
610 struct hammer_lock finalize_lock
; /* serialize finalization */
611 struct hammer_transaction trans
; /* shared transaction */
612 struct hammer_flusher_info
*info
[HAMMER_MAX_FLUSHERS
];
616 * Internal hammer mount data structure
618 struct hammer_mount
{
620 /*struct vnode *rootvp;*/
621 struct hammer_ino_rb_tree rb_inos_root
;
622 struct hammer_vol_rb_tree rb_vols_root
;
623 struct hammer_nod_rb_tree rb_nods_root
;
624 struct hammer_und_rb_tree rb_undo_root
;
625 struct hammer_res_rb_tree rb_resv_root
;
626 struct hammer_buf_rb_tree rb_bufs_root
;
627 struct hammer_volume
*rootvol
;
628 struct hammer_base_elm root_btree_beg
;
629 struct hammer_base_elm root_btree_end
;
635 int masterid
; /* -1 or 0-15 - clustering and mirroring */
636 int rsv_inodes
; /* reserved space due to dirty inodes */
637 int rsv_databufs
; /* reserved space due to dirty buffers */
638 int rsv_databytes
; /* reserved space due to record data */
639 int rsv_recs
; /* reserved space due to dirty records */
641 int count_newrecords
;
643 int inode_reclaims
; /* inodes pending reclaim by flusher */
644 int count_inodes
; /* total number of inodes */
645 int count_iqueued
; /* inodes queued to flusher */
647 struct hammer_flusher flusher
;
649 u_int check_interrupt
;
652 struct hammer_io_list volu_list
; /* dirty undo buffers */
653 struct hammer_io_list undo_list
; /* dirty undo buffers */
654 struct hammer_io_list data_list
; /* dirty data buffers */
655 struct hammer_io_list alt_data_list
; /* dirty data buffers */
656 struct hammer_io_list meta_list
; /* dirty meta bufs */
657 struct hammer_io_list lose_list
; /* loose buffers */
658 int locked_dirty_count
; /* meta/volu count */
659 int io_running_count
;
660 int objid_cache_count
;
661 hammer_tid_t asof
; /* snapshot mount */
662 hammer_off_t next_tid
;
663 int64_t copy_stat_freebigblocks
; /* number of free bigblocks */
665 u_int32_t namekey_iterator
;
666 struct netexport export
;
667 struct hammer_lock sync_lock
;
668 struct hammer_lock free_lock
;
669 struct hammer_lock undo_lock
;
670 struct hammer_lock blkmap_lock
;
671 struct hammer_blockmap blockmap
[HAMMER_MAX_ZONES
];
672 struct hammer_undo undos
[HAMMER_MAX_UNDOS
];
674 TAILQ_HEAD(, hammer_undo
) undo_lru_list
;
675 TAILQ_HEAD(, hammer_inode
) flush_list
;
676 TAILQ_HEAD(, hammer_reserve
) delay_list
;
677 TAILQ_HEAD(, hammer_objid_cache
) objid_cache_list
;
678 TAILQ_HEAD(, hammer_reclaim
) reclaim_list
;
681 typedef struct hammer_mount
*hammer_mount_t
;
683 #define HAMMER_MOUNT_UNUSED0001 0x0001
685 struct hammer_sync_info
{
694 extern struct vop_ops hammer_vnode_vops
;
695 extern struct vop_ops hammer_spec_vops
;
696 extern struct vop_ops hammer_fifo_vops
;
697 extern struct bio_ops hammer_bioops
;
699 extern int hammer_debug_io
;
700 extern int hammer_debug_general
;
701 extern int hammer_debug_debug
;
702 extern int hammer_debug_inode
;
703 extern int hammer_debug_locks
;
704 extern int hammer_debug_btree
;
705 extern int hammer_debug_tid
;
706 extern int hammer_debug_recover
;
707 extern int hammer_debug_recover_faults
;
708 extern int hammer_debug_cluster_enable
;
709 extern int hammer_count_inodes
;
710 extern int hammer_count_iqueued
;
711 extern int hammer_count_reclaiming
;
712 extern int hammer_count_records
;
713 extern int hammer_count_record_datas
;
714 extern int hammer_count_volumes
;
715 extern int hammer_count_buffers
;
716 extern int hammer_count_nodes
;
717 extern int64_t hammer_stats_btree_lookups
;
718 extern int64_t hammer_stats_btree_searches
;
719 extern int64_t hammer_stats_btree_inserts
;
720 extern int64_t hammer_stats_btree_deletes
;
721 extern int64_t hammer_stats_btree_elements
;
722 extern int64_t hammer_stats_btree_splits
;
723 extern int64_t hammer_stats_btree_iterations
;
724 extern int64_t hammer_stats_record_iterations
;
725 extern int hammer_count_dirtybufs
;
726 extern int hammer_count_refedbufs
;
727 extern int hammer_count_reservations
;
728 extern int hammer_count_io_running_read
;
729 extern int hammer_count_io_running_write
;
730 extern int hammer_count_io_locked
;
731 extern int hammer_limit_dirtybufs
;
732 extern int hammer_limit_iqueued
;
733 extern int hammer_limit_recs
;
734 extern int hammer_bio_count
;
735 extern int hammer_verify_zone
;
736 extern int hammer_write_mode
;
737 extern int64_t hammer_contention_count
;
739 int hammer_vop_inactive(struct vop_inactive_args
*);
740 int hammer_vop_reclaim(struct vop_reclaim_args
*);
741 int hammer_get_vnode(struct hammer_inode
*ip
, struct vnode
**vpp
);
742 struct hammer_inode
*hammer_get_inode(hammer_transaction_t trans
,
743 hammer_inode_t dip
, u_int64_t obj_id
,
744 hammer_tid_t asof
, u_int32_t localization
,
745 int flags
, int *errorp
);
746 void hammer_scan_inode_snapshots(hammer_mount_t hmp
,
747 hammer_inode_info_t iinfo
,
748 int (*callback
)(hammer_inode_t ip
, void *data
),
750 void hammer_put_inode(struct hammer_inode
*ip
);
751 void hammer_put_inode_ref(struct hammer_inode
*ip
);
752 void hammer_inode_waitreclaims(hammer_mount_t hmp
);
754 int hammer_unload_volume(hammer_volume_t volume
, void *data __unused
);
755 int hammer_adjust_volume_mode(hammer_volume_t volume
, void *data __unused
);
757 int hammer_unload_buffer(hammer_buffer_t buffer
, void *data __unused
);
758 int hammer_install_volume(hammer_mount_t hmp
, const char *volname
);
760 int hammer_ip_lookup(hammer_cursor_t cursor
);
761 int hammer_ip_first(hammer_cursor_t cursor
);
762 int hammer_ip_next(hammer_cursor_t cursor
);
763 int hammer_ip_resolve_data(hammer_cursor_t cursor
);
764 int hammer_ip_delete_record(hammer_cursor_t cursor
, hammer_inode_t ip
,
766 int hammer_delete_at_cursor(hammer_cursor_t cursor
, int64_t *stat_bytes
);
767 int hammer_ip_check_directory_empty(hammer_transaction_t trans
,
769 int hammer_sync_hmp(hammer_mount_t hmp
, int waitfor
);
770 int hammer_queue_inodes_flusher(hammer_mount_t hmp
, int waitfor
);
774 hammer_alloc_mem_record(hammer_inode_t ip
, int data_len
);
775 void hammer_flush_record_done(hammer_record_t record
, int error
);
776 void hammer_wait_mem_record_ident(hammer_record_t record
, const char *ident
);
777 void hammer_rel_mem_record(hammer_record_t record
);
779 int hammer_cursor_up(hammer_cursor_t cursor
);
780 int hammer_cursor_up_locked(hammer_cursor_t cursor
);
781 int hammer_cursor_down(hammer_cursor_t cursor
);
782 int hammer_cursor_upgrade(hammer_cursor_t cursor
);
783 int hammer_cursor_upgrade_node(hammer_cursor_t cursor
);
784 void hammer_cursor_downgrade(hammer_cursor_t cursor
);
785 int hammer_cursor_seek(hammer_cursor_t cursor
, hammer_node_t node
,
787 void hammer_lock_ex_ident(struct hammer_lock
*lock
, const char *ident
);
788 int hammer_lock_ex_try(struct hammer_lock
*lock
);
789 void hammer_lock_sh(struct hammer_lock
*lock
);
790 void hammer_lock_sh_lowpri(struct hammer_lock
*lock
);
791 int hammer_lock_sh_try(struct hammer_lock
*lock
);
792 int hammer_lock_upgrade(struct hammer_lock
*lock
);
793 void hammer_lock_downgrade(struct hammer_lock
*lock
);
794 void hammer_unlock(struct hammer_lock
*lock
);
795 void hammer_ref(struct hammer_lock
*lock
);
796 void hammer_unref(struct hammer_lock
*lock
);
798 void hammer_sync_lock_ex(hammer_transaction_t trans
);
799 void hammer_sync_lock_sh(hammer_transaction_t trans
);
800 int hammer_sync_lock_sh_try(hammer_transaction_t trans
);
801 void hammer_sync_unlock(hammer_transaction_t trans
);
803 u_int32_t
hammer_to_unix_xid(uuid_t
*uuid
);
804 void hammer_guid_to_uuid(uuid_t
*uuid
, u_int32_t guid
);
805 void hammer_time_to_timespec(u_int64_t xtime
, struct timespec
*ts
);
806 u_int64_t
hammer_timespec_to_time(struct timespec
*ts
);
807 hammer_tid_t
hammer_str_to_tid(const char *str
);
808 hammer_tid_t
hammer_alloc_objid(hammer_mount_t hmp
, hammer_inode_t dip
);
809 void hammer_clear_objid(hammer_inode_t dip
);
810 void hammer_destroy_objid_cache(hammer_mount_t hmp
);
812 int hammer_enter_undo_history(hammer_mount_t hmp
, hammer_off_t offset
,
814 void hammer_clear_undo_history(hammer_mount_t hmp
);
815 enum vtype
hammer_get_vnode_type(u_int8_t obj_type
);
816 int hammer_get_dtype(u_int8_t obj_type
);
817 u_int8_t
hammer_get_obj_type(enum vtype vtype
);
818 int64_t hammer_directory_namekey(const void *name
, int len
);
819 int hammer_nohistory(hammer_inode_t ip
);
821 int hammer_init_cursor(hammer_transaction_t trans
, hammer_cursor_t cursor
,
822 hammer_node_cache_t cache
, hammer_inode_t ip
);
823 int hammer_reinit_cursor(hammer_cursor_t cursor
);
824 void hammer_normalize_cursor(hammer_cursor_t cursor
);
825 void hammer_done_cursor(hammer_cursor_t cursor
);
826 void hammer_mem_done(hammer_cursor_t cursor
);
828 int hammer_btree_lookup(hammer_cursor_t cursor
);
829 int hammer_btree_first(hammer_cursor_t cursor
);
830 int hammer_btree_last(hammer_cursor_t cursor
);
831 int hammer_btree_extract(hammer_cursor_t cursor
, int flags
);
832 int hammer_btree_iterate(hammer_cursor_t cursor
);
833 int hammer_btree_iterate_reverse(hammer_cursor_t cursor
);
834 int hammer_btree_insert(hammer_cursor_t cursor
,
835 hammer_btree_leaf_elm_t elm
);
836 int hammer_btree_delete(hammer_cursor_t cursor
);
837 int hammer_btree_mirror_propagate(hammer_transaction_t trans
,
838 hammer_node_t node
, int index
,
839 hammer_tid_t mirror_tid
);
841 int hammer_btree_cmp(hammer_base_elm_t key1
, hammer_base_elm_t key2
);
842 int hammer_btree_chkts(hammer_tid_t ts
, hammer_base_elm_t key
);
843 int hammer_btree_correct_rhb(hammer_cursor_t cursor
, hammer_tid_t tid
);
844 int hammer_btree_correct_lhb(hammer_cursor_t cursor
, hammer_tid_t tid
);
846 int btree_set_parent(hammer_transaction_t trans
, hammer_node_t node
,
847 hammer_btree_elm_t elm
);
848 int hammer_btree_lock_children(hammer_cursor_t cursor
,
849 struct hammer_node_locklist
**locklistp
);
850 void hammer_btree_unlock_children(struct hammer_node_locklist
**locklistp
);
851 int hammer_btree_search_node(hammer_base_elm_t elm
, hammer_node_ondisk_t node
);
852 hammer_node_t
hammer_btree_get_parent(hammer_node_t node
, int *parent_indexp
,
853 int *errorp
, int try_exclusive
);
855 void hammer_print_btree_node(hammer_node_ondisk_t ondisk
);
856 void hammer_print_btree_elm(hammer_btree_elm_t elm
, u_int8_t type
, int i
);
858 void *hammer_bread(struct hammer_mount
*hmp
, hammer_off_t off
,
859 int *errorp
, struct hammer_buffer
**bufferp
);
860 void *hammer_bnew(struct hammer_mount
*hmp
, hammer_off_t off
,
861 int *errorp
, struct hammer_buffer
**bufferp
);
862 void *hammer_bread_ext(struct hammer_mount
*hmp
, hammer_off_t off
, int bytes
,
863 int *errorp
, struct hammer_buffer
**bufferp
);
864 void *hammer_bnew_ext(struct hammer_mount
*hmp
, hammer_off_t off
, int bytes
,
865 int *errorp
, struct hammer_buffer
**bufferp
);
867 hammer_volume_t
hammer_get_root_volume(hammer_mount_t hmp
, int *errorp
);
869 hammer_volume_t
hammer_get_volume(hammer_mount_t hmp
,
870 int32_t vol_no
, int *errorp
);
871 hammer_buffer_t
hammer_get_buffer(hammer_mount_t hmp
, hammer_off_t buf_offset
,
872 int bytes
, int isnew
, int *errorp
);
873 void hammer_del_buffers(hammer_mount_t hmp
, hammer_off_t base_offset
,
874 hammer_off_t zone2_offset
, int bytes
);
876 int hammer_ref_volume(hammer_volume_t volume
);
877 int hammer_ref_buffer(hammer_buffer_t buffer
);
878 void hammer_flush_buffer_nodes(hammer_buffer_t buffer
);
880 void hammer_rel_volume(hammer_volume_t volume
, int flush
);
881 void hammer_rel_buffer(hammer_buffer_t buffer
, int flush
);
883 int hammer_vfs_export(struct mount
*mp
, int op
,
884 const struct export_args
*export
);
885 hammer_node_t
hammer_get_node(hammer_mount_t hmp
, hammer_off_t node_offset
,
886 int isnew
, int *errorp
);
887 void hammer_ref_node(hammer_node_t node
);
888 hammer_node_t
hammer_ref_node_safe(struct hammer_mount
*hmp
,
889 hammer_node_cache_t cache
, int *errorp
);
890 void hammer_rel_node(hammer_node_t node
);
891 void hammer_delete_node(hammer_transaction_t trans
,
893 void hammer_cache_node(hammer_node_cache_t cache
,
895 void hammer_uncache_node(hammer_node_cache_t cache
);
896 void hammer_flush_node(hammer_node_t node
);
898 void hammer_dup_buffer(struct hammer_buffer
**bufferp
,
899 struct hammer_buffer
*buffer
);
900 hammer_node_t
hammer_alloc_btree(hammer_transaction_t trans
, int *errorp
);
901 void *hammer_alloc_data(hammer_transaction_t trans
, int32_t data_len
,
902 u_int16_t rec_type
, hammer_off_t
*data_offsetp
,
903 struct hammer_buffer
**data_bufferp
, int *errorp
);
905 int hammer_generate_undo(hammer_transaction_t trans
, hammer_io_t io
,
906 hammer_off_t zone1_offset
, void *base
, int len
);
908 void hammer_put_volume(struct hammer_volume
*volume
, int flush
);
909 void hammer_put_buffer(struct hammer_buffer
*buffer
, int flush
);
911 hammer_off_t
hammer_freemap_alloc(hammer_transaction_t trans
,
912 hammer_off_t owner
, int *errorp
);
913 void hammer_freemap_free(hammer_transaction_t trans
, hammer_off_t phys_offset
,
914 hammer_off_t owner
, int *errorp
);
915 int hammer_checkspace(hammer_mount_t hmp
);
916 hammer_off_t
hammer_blockmap_alloc(hammer_transaction_t trans
, int zone
,
917 int bytes
, int *errorp
);
918 hammer_reserve_t
hammer_blockmap_reserve(hammer_mount_t hmp
, int zone
,
919 int bytes
, hammer_off_t
*zone_offp
, int *errorp
);
920 void hammer_blockmap_reserve_complete(hammer_mount_t hmp
,
921 hammer_reserve_t resv
);
922 void hammer_reserve_setdelay(hammer_mount_t hmp
, hammer_reserve_t resv
,
923 hammer_off_t zone2_offset
);
924 void hammer_reserve_clrdelay(hammer_mount_t hmp
, hammer_reserve_t resv
);
925 void hammer_blockmap_free(hammer_transaction_t trans
,
926 hammer_off_t bmap_off
, int bytes
);
927 void hammer_blockmap_finalize(hammer_transaction_t trans
,
928 hammer_off_t bmap_off
, int bytes
);
929 int hammer_blockmap_getfree(hammer_mount_t hmp
, hammer_off_t bmap_off
,
930 int *curp
, int *errorp
);
931 hammer_off_t
hammer_blockmap_lookup(hammer_mount_t hmp
, hammer_off_t bmap_off
,
933 hammer_off_t
hammer_undo_lookup(hammer_mount_t hmp
, hammer_off_t bmap_off
,
935 int64_t hammer_undo_used(hammer_mount_t hmp
);
936 int64_t hammer_undo_space(hammer_mount_t hmp
);
937 int64_t hammer_undo_max(hammer_mount_t hmp
);
939 void hammer_start_transaction(struct hammer_transaction
*trans
,
940 struct hammer_mount
*hmp
);
941 void hammer_simple_transaction(struct hammer_transaction
*trans
,
942 struct hammer_mount
*hmp
);
943 void hammer_start_transaction_fls(struct hammer_transaction
*trans
,
944 struct hammer_mount
*hmp
);
945 void hammer_done_transaction(struct hammer_transaction
*trans
);
947 void hammer_modify_inode(hammer_inode_t ip
, int flags
);
948 void hammer_flush_inode(hammer_inode_t ip
, int flags
);
949 void hammer_flush_inode_done(hammer_inode_t ip
);
950 void hammer_wait_inode(hammer_inode_t ip
);
952 int hammer_create_inode(struct hammer_transaction
*trans
, struct vattr
*vap
,
953 struct ucred
*cred
, struct hammer_inode
*dip
,
954 int pseudofs
, struct hammer_inode
**ipp
);
955 void hammer_rel_inode(hammer_inode_t ip
, int flush
);
956 int hammer_reload_inode(hammer_inode_t ip
, void *arg __unused
);
957 int hammer_ino_rb_compare(hammer_inode_t ip1
, hammer_inode_t ip2
);
959 int hammer_sync_inode(hammer_inode_t ip
);
960 void hammer_test_inode(hammer_inode_t ip
);
961 void hammer_inode_unloadable_check(hammer_inode_t ip
, int getvp
);
963 int hammer_ip_add_directory(struct hammer_transaction
*trans
,
964 hammer_inode_t dip
, const char *name
, int bytes
,
966 int hammer_ip_del_directory(struct hammer_transaction
*trans
,
967 hammer_cursor_t cursor
, hammer_inode_t dip
,
969 hammer_record_t
hammer_ip_add_bulk(hammer_inode_t ip
, off_t file_offset
,
970 void *data
, int bytes
, int *errorp
);
971 int hammer_ip_frontend_trunc(struct hammer_inode
*ip
, off_t file_size
);
972 int hammer_ip_add_record(struct hammer_transaction
*trans
,
973 hammer_record_t record
);
974 int hammer_ip_delete_range(hammer_cursor_t cursor
, hammer_inode_t ip
,
975 int64_t ran_beg
, int64_t ran_end
, int truncating
);
976 int hammer_ip_delete_range_all(hammer_cursor_t cursor
, hammer_inode_t ip
,
978 int hammer_ip_sync_data(hammer_cursor_t cursor
, hammer_inode_t ip
,
979 int64_t offset
, void *data
, int bytes
);
980 int hammer_ip_sync_record(hammer_transaction_t trans
, hammer_record_t rec
);
981 int hammer_ip_sync_record_cursor(hammer_cursor_t cursor
, hammer_record_t rec
);
983 int hammer_ioctl(hammer_inode_t ip
, u_long com
, caddr_t data
, int fflag
,
986 void hammer_io_init(hammer_io_t io
, hammer_mount_t hmp
,
987 enum hammer_io_type type
);
988 int hammer_io_read(struct vnode
*devvp
, struct hammer_io
*io
,
990 int hammer_io_new(struct vnode
*devvp
, struct hammer_io
*io
);
991 void hammer_io_inval(hammer_volume_t volume
, hammer_off_t zone2_offset
);
992 void hammer_io_release(struct hammer_io
*io
, int flush
);
993 void hammer_io_flush(struct hammer_io
*io
);
994 void hammer_io_waitdep(struct hammer_io
*io
);
995 void hammer_io_wait_all(hammer_mount_t hmp
, const char *ident
);
996 int hammer_io_direct_read(hammer_mount_t hmp
, struct bio
*bio
);
997 int hammer_io_direct_write(hammer_mount_t hmp
, hammer_btree_leaf_elm_t leaf
,
999 void hammer_io_direct_uncache(hammer_mount_t hmp
, hammer_btree_leaf_elm_t leaf
);
1000 void hammer_io_write_interlock(hammer_io_t io
);
1001 void hammer_io_done_interlock(hammer_io_t io
);
1002 void hammer_io_clear_modify(struct hammer_io
*io
, int inval
);
1003 void hammer_io_clear_modlist(struct hammer_io
*io
);
1004 void hammer_modify_volume(hammer_transaction_t trans
, hammer_volume_t volume
,
1005 void *base
, int len
);
1006 void hammer_modify_buffer(hammer_transaction_t trans
, hammer_buffer_t buffer
,
1007 void *base
, int len
);
1008 void hammer_modify_volume_done(hammer_volume_t volume
);
1009 void hammer_modify_buffer_done(hammer_buffer_t buffer
);
1011 int hammer_ioc_reblock(hammer_transaction_t trans
, hammer_inode_t ip
,
1012 struct hammer_ioc_reblock
*reblock
);
1013 int hammer_ioc_prune(hammer_transaction_t trans
, hammer_inode_t ip
,
1014 struct hammer_ioc_prune
*prune
);
1015 int hammer_ioc_mirror_read(hammer_transaction_t trans
, hammer_inode_t ip
,
1016 struct hammer_ioc_mirror_rw
*mirror
);
1017 int hammer_ioc_mirror_write(hammer_transaction_t trans
, hammer_inode_t ip
,
1018 struct hammer_ioc_mirror_rw
*mirror
);
1020 int hammer_signal_check(hammer_mount_t hmp
);
1022 void hammer_flusher_create(hammer_mount_t hmp
);
1023 void hammer_flusher_destroy(hammer_mount_t hmp
);
1024 void hammer_flusher_sync(hammer_mount_t hmp
);
1025 void hammer_flusher_async(hammer_mount_t hmp
);
1027 int hammer_recover(hammer_mount_t hmp
, hammer_volume_t rootvol
);
1028 void hammer_recover_flush_buffers(hammer_mount_t hmp
,
1029 hammer_volume_t root_volume
);
1031 void hammer_crc_set_blockmap(hammer_blockmap_t blockmap
);
1032 void hammer_crc_set_volume(hammer_volume_ondisk_t ondisk
);
1033 void hammer_crc_set_leaf(void *data
, hammer_btree_leaf_elm_t leaf
);
1035 int hammer_crc_test_blockmap(hammer_blockmap_t blockmap
);
1036 int hammer_crc_test_volume(hammer_volume_ondisk_t ondisk
);
1037 int hammer_crc_test_btree(hammer_node_ondisk_t ondisk
);
1038 int hammer_crc_test_leaf(void *data
, hammer_btree_leaf_elm_t leaf
);
1039 void hkprintf(const char *ctl
, ...);
1041 int hammer_blocksize(int64_t file_offset
);
1042 int64_t hammer_blockdemarc(int64_t file_offset1
, int64_t file_offset2
);
1046 static __inline
void
1047 hammer_wait_mem_record(hammer_record_t record
)
1049 hammer_wait_mem_record_ident(record
, "hmmwai");
1052 static __inline
void
1053 hammer_lock_ex(struct hammer_lock
*lock
)
1055 hammer_lock_ex_ident(lock
, "hmrlck");
1059 * Indicate that a B-Tree node is being modified.
1061 static __inline
void
1062 hammer_modify_node_noundo(hammer_transaction_t trans
, hammer_node_t node
)
1064 hammer_modify_buffer(trans
, node
->buffer
, NULL
, 0);
1067 static __inline
void
1068 hammer_modify_node_all(hammer_transaction_t trans
, struct hammer_node
*node
)
1070 hammer_modify_buffer(trans
, node
->buffer
,
1071 node
->ondisk
, sizeof(*node
->ondisk
));
1074 static __inline
void
1075 hammer_modify_node(hammer_transaction_t trans
, hammer_node_t node
,
1076 void *base
, int len
)
1078 hammer_crc_t
*crcptr
;
1080 KKASSERT((char *)base
>= (char *)node
->ondisk
&&
1081 (char *)base
+ len
<=
1082 (char *)node
->ondisk
+ sizeof(*node
->ondisk
));
1083 hammer_modify_buffer(trans
, node
->buffer
, base
, len
);
1084 crcptr
= &node
->ondisk
->crc
;
1085 hammer_modify_buffer(trans
, node
->buffer
, crcptr
, sizeof(hammer_crc_t
));
1086 --node
->buffer
->io
.modify_refs
; /* only want one ref */
1090 * Indicate that the specified modifications have been completed.
1092 * Do not try to generate the crc here, it's very expensive to do and a
1093 * sequence of insertions or deletions can result in many calls to this
1094 * function on the same node.
1096 static __inline
void
1097 hammer_modify_node_done(hammer_node_t node
)
1099 node
->flags
|= HAMMER_NODE_CRCGOOD
;
1100 if ((node
->flags
& HAMMER_NODE_NEEDSCRC
) == 0) {
1101 node
->flags
|= HAMMER_NODE_NEEDSCRC
;
1102 node
->buffer
->io
.gencrc
= 1;
1103 hammer_ref_node(node
);
1105 hammer_modify_buffer_done(node
->buffer
);
1108 #define hammer_modify_volume_field(trans, vol, field) \
1109 hammer_modify_volume(trans, vol, &(vol)->ondisk->field, \
1110 sizeof((vol)->ondisk->field))
1112 #define hammer_modify_node_field(trans, node, field) \
1113 hammer_modify_node(trans, node, &(node)->ondisk->field, \
1114 sizeof((node)->ondisk->field))