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 1.130 2008/11/13 02:18:43 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>
54 #include <sys/globaldata.h>
55 #include <sys/lockf.h>
57 #include <sys/queue.h>
59 #include <sys/globaldata.h>
62 #include <sys/signal2.h>
63 #include "hammer_disk.h"
64 #include "hammer_mount.h"
65 #include "hammer_ioctl.h"
67 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
69 MALLOC_DECLARE(M_HAMMER
);
74 #if !defined(KTR_HAMMER)
75 #define KTR_HAMMER KTR_ALL
77 KTR_INFO_MASTER_EXTERN(hammer
);
85 * Key structure used for custom RB tree inode lookups. This prototypes
86 * the function hammer_ino_rb_tree_RB_LOOKUP_INFO(root, info).
88 typedef struct hammer_inode_info
{
89 int64_t obj_id
; /* (key) object identifier */
90 hammer_tid_t obj_asof
; /* (key) snapshot transid or 0 */
91 u_int32_t obj_localization
; /* (key) pseudo-fs */
93 struct hammer_btree_leaf_elm
*leaf
;
95 } *hammer_inode_info_t
;
97 typedef enum hammer_transaction_type
{
101 } hammer_transaction_type_t
;
104 * HAMMER Transaction tracking
106 struct hammer_transaction
{
107 hammer_transaction_type_t type
;
108 struct hammer_mount
*hmp
;
114 struct hammer_volume
*rootvol
;
117 typedef struct hammer_transaction
*hammer_transaction_t
;
119 #define HAMMER_TRANSF_NEWINODE 0x0001
120 #define HAMMER_TRANSF_DIDIO 0x0002
121 #define HAMMER_TRANSF_CRCDOM 0x0004 /* EDOM on CRC error, less critical */
127 int refs
; /* active references delay writes */
128 volatile u_int lockval
; /* lock count and control bits */
129 struct thread
*owner
; /* owner if exclusively held */
132 #define HAMMER_LOCKF_EXCLUSIVE 0x40000000
133 #define HAMMER_LOCKF_WANTED 0x80000000
136 hammer_notlocked(struct hammer_lock
*lock
)
138 return(lock
->lockval
== 0);
142 hammer_islocked(struct hammer_lock
*lock
)
144 return(lock
->lockval
!= 0);
148 hammer_isactive(struct hammer_lock
*lock
)
150 return(lock
->refs
!= 0);
154 hammer_islastref(struct hammer_lock
*lock
)
156 return(lock
->refs
== 1);
160 * Return if we specifically own the lock exclusively.
163 hammer_lock_excl_owned(struct hammer_lock
*lock
, thread_t td
)
165 if ((lock
->lockval
& HAMMER_LOCKF_EXCLUSIVE
) &&
173 * Flush state, used by various structures
175 typedef enum hammer_inode_state
{
179 } hammer_inode_state_t
;
181 TAILQ_HEAD(hammer_record_list
, hammer_record
);
184 * Pseudo-filesystem extended data tracking
186 struct hammer_pfs_rb_tree
;
187 struct hammer_pseudofs_inmem
;
188 RB_HEAD(hammer_pfs_rb_tree
, hammer_pseudofs_inmem
);
189 RB_PROTOTYPE2(hammer_pfs_rb_tree
, hammer_pseudofs_inmem
, rb_node
,
190 hammer_pfs_rb_compare
, u_int32_t
);
192 struct hammer_pseudofs_inmem
{
193 RB_ENTRY(hammer_pseudofs_inmem
) rb_node
;
194 struct hammer_lock lock
;
195 u_int32_t localization
;
196 hammer_tid_t create_tid
;
199 struct hammer_pseudofs_data pfsd
;
202 typedef struct hammer_pseudofs_inmem
*hammer_pseudofs_inmem_t
;
204 #define HAMMER_PFSM_DELETED 0x0001
207 * Cache object ids. A fixed number of objid cache structures are
208 * created to reserve object id's for newly created files in multiples
209 * of 100,000, localized to a particular directory, and recycled as
210 * needed. This allows parallel create operations in different
211 * directories to retain fairly localized object ids which in turn
212 * improves reblocking performance and layout.
214 #define OBJID_CACHE_SIZE 1024
215 #define OBJID_CACHE_BULK_BITS 10 /* 10 bits (1024) */
216 #define OBJID_CACHE_BULK (32 * 32) /* two level (1024) */
217 #define OBJID_CACHE_BULK_MASK (OBJID_CACHE_BULK - 1)
218 #define OBJID_CACHE_BULK_MASK64 ((u_int64_t)(OBJID_CACHE_BULK - 1))
220 typedef struct hammer_objid_cache
{
221 TAILQ_ENTRY(hammer_objid_cache
) entry
;
222 struct hammer_inode
*dip
;
223 hammer_tid_t base_tid
;
227 } *hammer_objid_cache_t
;
230 * Associate an inode with a B-Tree node to cache search start positions
232 typedef struct hammer_node_cache
{
233 TAILQ_ENTRY(hammer_node_cache
) entry
;
234 struct hammer_node
*node
;
235 struct hammer_inode
*ip
;
236 } *hammer_node_cache_t
;
238 TAILQ_HEAD(hammer_node_cache_list
, hammer_node_cache
);
241 * Structure used to organize flush groups. Flush groups must be
242 * organized into chunks in order to avoid blowing out the UNDO FIFO.
243 * Without this a 'sync' could end up flushing 50,000 inodes in a single
246 struct hammer_flush_group
{
247 TAILQ_ENTRY(hammer_flush_group
) flush_entry
;
248 TAILQ_HEAD(, hammer_inode
) flush_list
;
249 int unused01
; /* inode load */
250 int total_count
; /* record load */
251 int running
; /* group is running */
256 typedef struct hammer_flush_group
*hammer_flush_group_t
;
258 TAILQ_HEAD(hammer_flush_group_list
, hammer_flush_group
);
261 * Structure used to represent an inode in-memory.
263 * The record and data associated with an inode may be out of sync with
264 * the disk (xDIRTY flags), or not even on the disk at all (ONDISK flag
267 * An inode may also hold a cache of unsynchronized records, used for
268 * database and directories only. Unsynchronized regular file data is
269 * stored in the buffer cache.
271 * NOTE: A file which is created and destroyed within the initial
272 * synchronization period can wind up not doing any disk I/O at all.
274 * Finally, an inode may cache numerous disk-referencing B-Tree cursors.
276 struct hammer_ino_rb_tree
;
278 RB_HEAD(hammer_ino_rb_tree
, hammer_inode
);
279 RB_PROTOTYPEX(hammer_ino_rb_tree
, INFO
, hammer_inode
, rb_node
,
280 hammer_ino_rb_compare
, hammer_inode_info_t
);
282 struct hammer_rec_rb_tree
;
283 struct hammer_record
;
284 RB_HEAD(hammer_rec_rb_tree
, hammer_record
);
285 RB_PROTOTYPEX(hammer_rec_rb_tree
, INFO
, hammer_record
, rb_node
,
286 hammer_rec_rb_compare
, hammer_btree_leaf_elm_t
);
288 TAILQ_HEAD(hammer_node_list
, hammer_node
);
290 struct hammer_inode
{
291 RB_ENTRY(hammer_inode
) rb_node
;
292 hammer_inode_state_t flush_state
;
293 hammer_flush_group_t flush_group
;
294 TAILQ_ENTRY(hammer_inode
) flush_entry
;
295 struct hammer_record_list target_list
; /* target of dependant recs */
296 int64_t obj_id
; /* (key) object identifier */
297 hammer_tid_t obj_asof
; /* (key) snapshot or 0 */
298 u_int32_t obj_localization
; /* (key) pseudo-fs */
299 struct hammer_mount
*hmp
;
300 hammer_objid_cache_t objid_cache
;
302 int error
; /* flush error */
303 int cursor_ip_refs
; /* sanity */
306 hammer_pseudofs_inmem_t pfsm
;
307 struct lockf advlock
;
308 struct hammer_lock lock
; /* sync copy interlock */
310 struct hammer_btree_leaf_elm ino_leaf
; /* in-memory cache */
311 struct hammer_inode_data ino_data
; /* in-memory cache */
312 struct hammer_rec_rb_tree rec_tree
; /* in-memory cache */
314 struct hammer_node_cache cache
[4]; /* search initiate cache */
317 * When a demark is created to synchronize an inode to
318 * disk, certain fields are copied so the front-end VOPs
319 * can continue to run in parallel with the synchronization
320 * occuring in the background.
322 int sync_flags
; /* to-sync flags cache */
323 off_t sync_trunc_off
; /* to-sync truncation */
324 off_t save_trunc_off
; /* write optimization */
325 struct hammer_btree_leaf_elm sync_ino_leaf
; /* to-sync cache */
326 struct hammer_inode_data sync_ino_data
; /* to-sync cache */
329 typedef struct hammer_inode
*hammer_inode_t
;
331 #define VTOI(vp) ((struct hammer_inode *)(vp)->v_data)
333 #define HAMMER_INODE_DDIRTY 0x0001 /* in-memory ino_data is dirty */
334 /* (not including atime/mtime) */
335 #define HAMMER_INODE_RSV_INODES 0x0002 /* hmp->rsv_inodes bumped */
336 #define HAMMER_INODE_CONN_DOWN 0x0004 /* include in downward recursion */
337 #define HAMMER_INODE_XDIRTY 0x0008 /* in-memory records */
338 #define HAMMER_INODE_ONDISK 0x0010 /* inode is on-disk (else not yet) */
339 #define HAMMER_INODE_FLUSH 0x0020 /* flush on last ref */
340 #define HAMMER_INODE_DELETED 0x0080 /* inode delete (backend) */
341 #define HAMMER_INODE_DELONDISK 0x0100 /* delete synchronized to disk */
342 #define HAMMER_INODE_RO 0x0200 /* read-only (because of as-of) */
343 #define HAMMER_INODE_VHELD 0x0400 /* vnode held on sync */
344 #define HAMMER_INODE_DONDISK 0x0800 /* data records may be on disk */
345 #define HAMMER_INODE_BUFS 0x1000 /* dirty high level bps present */
346 #define HAMMER_INODE_REFLUSH 0x2000 /* flush on dependancy / reflush */
347 #define HAMMER_INODE_RECLAIM 0x4000 /* trying to reclaim */
348 #define HAMMER_INODE_FLUSHW 0x8000 /* Someone waiting for flush */
350 #define HAMMER_INODE_TRUNCATED 0x00010000
351 #define HAMMER_INODE_DELETING 0x00020000 /* inode delete request (frontend)*/
352 #define HAMMER_INODE_RESIGNAL 0x00040000 /* re-signal on re-flush */
353 #define HAMMER_INODE_ATIME 0x00100000 /* in-memory atime modified */
354 #define HAMMER_INODE_MTIME 0x00200000 /* in-memory mtime modified */
355 #define HAMMER_INODE_WOULDBLOCK 0x00400000 /* re-issue to new flush group */
356 #define HAMMER_INODE_DUMMY 0x00800000 /* dummy inode covering bad file */
357 #define HAMMER_INODE_CLOSESYNC 0x01000000 /* synchronously fsync on close */
358 #define HAMMER_INODE_CLOSEASYNC 0x02000000 /* asynchronously fsync on close */
360 #define HAMMER_INODE_MODMASK (HAMMER_INODE_DDIRTY| \
361 HAMMER_INODE_XDIRTY|HAMMER_INODE_BUFS| \
362 HAMMER_INODE_ATIME|HAMMER_INODE_MTIME| \
363 HAMMER_INODE_TRUNCATED|HAMMER_INODE_DELETING)
365 #define HAMMER_INODE_MODMASK_NOXDIRTY \
366 (HAMMER_INODE_MODMASK & ~HAMMER_INODE_XDIRTY)
368 #define HAMMER_FLUSH_GROUP_SIZE 64
370 #define HAMMER_FLUSH_SIGNAL 0x0001
371 #define HAMMER_FLUSH_RECURSION 0x0002
374 * Used by the inode reclaim code to pipeline reclaims and avoid
375 * blowing out kernel memory or letting the flusher get too far
376 * behind. The reclaim wakes up when count reaches 0 or the
379 struct hammer_reclaim
{
380 TAILQ_ENTRY(hammer_reclaim
) entry
;
384 #define HAMMER_RECLAIM_FLUSH 2000
385 #define HAMMER_RECLAIM_WAIT 4000
388 * Structure used to represent an unsynchronized record in-memory. These
389 * records typically represent directory entries. Only non-historical
390 * records are kept in-memory.
392 * Records are organized as a per-inode RB-Tree. If the inode is not
393 * on disk then neither are any records and the in-memory record tree
394 * represents the entire contents of the inode. If the inode is on disk
395 * then the on-disk B-Tree is scanned in parallel with the in-memory
396 * RB-Tree to synthesize the current state of the file.
398 * Records are also used to enforce the ordering of directory create/delete
399 * operations. A new inode will not be flushed to disk unless its related
400 * directory entry is also being flushed at the same time. A directory entry
401 * will not be removed unless its related inode is also being removed at the
404 typedef enum hammer_record_type
{
405 HAMMER_MEM_RECORD_GENERAL
, /* misc record */
406 HAMMER_MEM_RECORD_INODE
, /* inode record */
407 HAMMER_MEM_RECORD_ADD
, /* positive memory cache record */
408 HAMMER_MEM_RECORD_DEL
, /* negative delete-on-disk record */
409 HAMMER_MEM_RECORD_DATA
/* bulk-data record w/on-disk ref */
410 } hammer_record_type_t
;
412 struct hammer_record
{
413 RB_ENTRY(hammer_record
) rb_node
;
414 TAILQ_ENTRY(hammer_record
) target_entry
;
415 hammer_inode_state_t flush_state
;
416 hammer_flush_group_t flush_group
;
417 hammer_record_type_t type
;
418 struct hammer_lock lock
;
419 struct hammer_reserve
*resv
;
420 struct hammer_inode
*ip
;
421 struct hammer_inode
*target_ip
;
422 struct hammer_btree_leaf_elm leaf
;
423 union hammer_data_ondisk
*data
;
425 hammer_off_t zone2_offset
; /* direct-write only */
428 typedef struct hammer_record
*hammer_record_t
;
431 * Record flags. Note that FE can only be set by the frontend if the
432 * record has not been interlocked by the backend w/ BE.
434 #define HAMMER_RECF_ALLOCDATA 0x0001
435 #define HAMMER_RECF_ONRBTREE 0x0002
436 #define HAMMER_RECF_DELETED_FE 0x0004 /* deleted (frontend) */
437 #define HAMMER_RECF_DELETED_BE 0x0008 /* deleted (backend) */
438 #define HAMMER_RECF_COMMITTED 0x0010 /* committed to the B-Tree */
439 #define HAMMER_RECF_INTERLOCK_BE 0x0020 /* backend interlock */
440 #define HAMMER_RECF_WANTED 0x0040 /* wanted by the frontend */
441 #define HAMMER_RECF_CONVERT_DELETE 0x0100 /* special case */
442 #define HAMMER_RECF_DIRECT_IO 0x0200 /* related direct I/O running*/
443 #define HAMMER_RECF_DIRECT_WAIT 0x0400 /* related direct I/O running*/
444 #define HAMMER_RECF_DIRECT_INVAL 0x0800 /* buffer alias invalidation */
447 * hammer_delete_at_cursor() flags
449 #define HAMMER_DELETE_ADJUST 0x0001
450 #define HAMMER_DELETE_DESTROY 0x0002
453 * In-memory structures representing on-disk structures.
455 struct hammer_volume
;
456 struct hammer_buffer
;
459 struct hammer_reserve
;
461 RB_HEAD(hammer_vol_rb_tree
, hammer_volume
);
462 RB_HEAD(hammer_buf_rb_tree
, hammer_buffer
);
463 RB_HEAD(hammer_nod_rb_tree
, hammer_node
);
464 RB_HEAD(hammer_und_rb_tree
, hammer_undo
);
465 RB_HEAD(hammer_res_rb_tree
, hammer_reserve
);
467 RB_PROTOTYPE2(hammer_vol_rb_tree
, hammer_volume
, rb_node
,
468 hammer_vol_rb_compare
, int32_t);
469 RB_PROTOTYPE2(hammer_buf_rb_tree
, hammer_buffer
, rb_node
,
470 hammer_buf_rb_compare
, hammer_off_t
);
471 RB_PROTOTYPE2(hammer_nod_rb_tree
, hammer_node
, rb_node
,
472 hammer_nod_rb_compare
, hammer_off_t
);
473 RB_PROTOTYPE2(hammer_und_rb_tree
, hammer_undo
, rb_node
,
474 hammer_und_rb_compare
, hammer_off_t
);
475 RB_PROTOTYPE2(hammer_res_rb_tree
, hammer_reserve
, rb_node
,
476 hammer_res_rb_compare
, hammer_off_t
);
479 * IO management - embedded at the head of various in-memory structures
481 * VOLUME - hammer_volume containing meta-data
482 * META_BUFFER - hammer_buffer containing meta-data
483 * DATA_BUFFER - hammer_buffer containing pure-data
485 * Dirty volume headers and dirty meta-data buffers are locked until the
486 * flusher can sequence them out. Dirty pure-data buffers can be written.
487 * Clean buffers can be passively released.
489 typedef enum hammer_io_type
{
490 HAMMER_STRUCTURE_VOLUME
,
491 HAMMER_STRUCTURE_META_BUFFER
,
492 HAMMER_STRUCTURE_UNDO_BUFFER
,
493 HAMMER_STRUCTURE_DATA_BUFFER
496 union hammer_io_structure
;
500 LIST_ENTRY(worklist
) node
;
503 TAILQ_HEAD(hammer_io_list
, hammer_io
);
504 typedef struct hammer_io_list
*hammer_io_list_t
;
507 struct worklist worklist
;
508 struct hammer_lock lock
;
509 enum hammer_io_type type
;
510 struct hammer_mount
*hmp
;
511 struct hammer_volume
*volume
;
512 TAILQ_ENTRY(hammer_io
) mod_entry
; /* list entry if modified */
513 hammer_io_list_t mod_list
;
515 int64_t offset
; /* zone-2 offset */
516 int bytes
; /* buffer cache buffer size */
517 int loading
; /* loading/unloading interlock */
520 u_int modified
: 1; /* bp's data was modified */
521 u_int released
: 1; /* bp released (w/ B_LOCKED set) */
522 u_int running
: 1; /* bp write IO in progress */
523 u_int waiting
: 1; /* someone is waiting on us */
524 u_int validated
: 1; /* ondisk has been validated */
525 u_int waitdep
: 1; /* flush waits for dependancies */
526 u_int recovered
: 1; /* has recovery ref */
527 u_int waitmod
: 1; /* waiting for modify_refs */
528 u_int reclaim
: 1; /* reclaim requested */
529 u_int gencrc
: 1; /* crc needs to be generated */
530 u_int ioerror
: 1; /* abort on io-error */
533 typedef struct hammer_io
*hammer_io_t
;
535 #define HAMMER_CLUSTER_SIZE (64 * 1024)
536 #if HAMMER_CLUSTER_SIZE > MAXBSIZE
537 #undef HAMMER_CLUSTER_SIZE
538 #define HAMMER_CLUSTER_SIZE MAXBSIZE
540 #define HAMMER_CLUSTER_BUFS (HAMMER_CLUSTER_SIZE / HAMMER_BUFSIZE)
543 * In-memory volume representing on-disk buffer
545 struct hammer_volume
{
547 RB_ENTRY(hammer_volume
) rb_node
;
548 struct hammer_volume_ondisk
*ondisk
;
550 int64_t nblocks
; /* note: special calculation for statfs */
551 int64_t buffer_base
; /* base offset of buffer 0 */
552 hammer_off_t maxbuf_off
; /* Maximum buffer offset (zone-2) */
553 hammer_off_t maxraw_off
; /* Maximum raw offset for device */
559 typedef struct hammer_volume
*hammer_volume_t
;
562 * In-memory buffer (other then volume, super-cluster, or cluster),
563 * representing an on-disk buffer.
565 struct hammer_buffer
{
567 RB_ENTRY(hammer_buffer
) rb_node
;
569 hammer_off_t zoneX_offset
;
570 hammer_off_t zone2_offset
;
571 struct hammer_reserve
*resv
;
572 struct hammer_node_list clist
;
575 typedef struct hammer_buffer
*hammer_buffer_t
;
578 * In-memory B-Tree node, representing an on-disk B-Tree node.
580 * This is a hang-on structure which is backed by a hammer_buffer,
581 * indexed by a hammer_cluster, and used for fine-grained locking of
582 * B-Tree nodes in order to properly control lock ordering. A hammer_buffer
583 * can contain multiple nodes representing wildly disassociated portions
584 * of the B-Tree so locking cannot be done on a buffer-by-buffer basis.
586 * This structure uses a cluster-relative index to reduce the number
587 * of layers required to access it, and also because all on-disk B-Tree
588 * references are cluster-relative offsets.
591 struct hammer_lock lock
; /* node-by-node lock */
592 TAILQ_ENTRY(hammer_node
) entry
; /* per-buffer linkage */
593 RB_ENTRY(hammer_node
) rb_node
; /* per-cluster linkage */
594 hammer_off_t node_offset
; /* full offset spec */
595 struct hammer_mount
*hmp
;
596 struct hammer_buffer
*buffer
; /* backing buffer */
597 hammer_node_ondisk_t ondisk
; /* ptr to on-disk structure */
598 TAILQ_HEAD(, hammer_cursor
) cursor_list
; /* deadlock recovery */
599 struct hammer_node_cache_list cache_list
; /* passive caches */
601 int loading
; /* load interlock */
604 #define HAMMER_NODE_DELETED 0x0001
605 #define HAMMER_NODE_FLUSH 0x0002
606 #define HAMMER_NODE_CRCGOOD 0x0004
607 #define HAMMER_NODE_NEEDSCRC 0x0008
608 #define HAMMER_NODE_NEEDSMIRROR 0x0010
609 #define HAMMER_NODE_CRCBAD 0x0020
611 #define HAMMER_NODE_CRCANY (HAMMER_NODE_CRCGOOD | HAMMER_NODE_CRCBAD)
613 typedef struct hammer_node
*hammer_node_t
;
616 * List of locked nodes. This structure is used to lock potentially large
617 * numbers of nodes as an aid for complex B-Tree operations.
619 struct hammer_node_lock
;
620 TAILQ_HEAD(hammer_node_lock_list
, hammer_node_lock
);
622 struct hammer_node_lock
{
623 TAILQ_ENTRY(hammer_node_lock
) entry
;
624 struct hammer_node_lock_list list
;
625 struct hammer_node_lock
*parent
;
627 hammer_node_ondisk_t copy
; /* copy of on-disk data */
628 int index
; /* index of this node in parent */
629 int count
; /* count children */
633 typedef struct hammer_node_lock
*hammer_node_lock_t
;
635 #define HAMMER_NODE_LOCK_UPDATED 0x0001
638 * Common I/O management structure - embedded in in-memory structures
639 * which are backed by filesystem buffers.
641 union hammer_io_structure
{
643 struct hammer_volume volume
;
644 struct hammer_buffer buffer
;
647 typedef union hammer_io_structure
*hammer_io_structure_t
;
650 * The reserve structure prevents the blockmap from allocating
651 * out of a reserved bigblock. Such reservations are used by
652 * the direct-write mechanism.
654 * The structure is also used to hold off on reallocations of
655 * big blocks from the freemap until flush dependancies have
658 struct hammer_reserve
{
659 RB_ENTRY(hammer_reserve
) rb_node
;
660 TAILQ_ENTRY(hammer_reserve
) delay_entry
;
666 hammer_off_t zone_offset
;
669 typedef struct hammer_reserve
*hammer_reserve_t
;
671 #define HAMMER_RESF_ONDELAY 0x0001
672 #define HAMMER_RESF_LAYER2FREE 0x0002
674 #include "hammer_cursor.h"
677 * The undo structure tracks recent undos to avoid laying down duplicate
678 * undos within a flush group, saving us a significant amount of overhead.
680 * This is strictly a heuristic.
682 #define HAMMER_MAX_UNDOS 1024
683 #define HAMMER_MAX_FLUSHERS 4
686 RB_ENTRY(hammer_undo
) rb_node
;
687 TAILQ_ENTRY(hammer_undo
) lru_entry
;
692 typedef struct hammer_undo
*hammer_undo_t
;
694 struct hammer_flusher_info
;
695 TAILQ_HEAD(hammer_flusher_info_list
, hammer_flusher_info
);
697 struct hammer_flusher
{
698 int signal
; /* flusher thread sequencer */
699 int act
; /* currently active flush group */
700 int done
; /* set to act when complete */
701 int next
; /* next flush group */
702 int group_lock
; /* lock sequencing of the next flush */
703 int exiting
; /* request master exit */
704 thread_t td
; /* master flusher thread */
705 hammer_tid_t tid
; /* last flushed transaction id */
706 int finalize_want
; /* serialize finalization */
707 struct hammer_lock finalize_lock
; /* serialize finalization */
708 struct hammer_transaction trans
; /* shared transaction */
709 struct hammer_flusher_info_list run_list
;
710 struct hammer_flusher_info_list ready_list
;
714 * Internal hammer mount data structure
716 struct hammer_mount
{
718 /*struct vnode *rootvp;*/
719 struct hammer_ino_rb_tree rb_inos_root
;
720 struct hammer_vol_rb_tree rb_vols_root
;
721 struct hammer_nod_rb_tree rb_nods_root
;
722 struct hammer_und_rb_tree rb_undo_root
;
723 struct hammer_res_rb_tree rb_resv_root
;
724 struct hammer_buf_rb_tree rb_bufs_root
;
725 struct hammer_pfs_rb_tree rb_pfsm_root
;
726 struct hammer_volume
*rootvol
;
727 struct hammer_base_elm root_btree_beg
;
728 struct hammer_base_elm root_btree_end
;
730 struct malloc_type
*m_misc
;
731 struct malloc_type
*m_inodes
;
733 int flags
; /* HAMMER_MOUNT_xxx flags */
738 int master_id
; /* -1 or 0-15 - clustering and mirroring */
739 int version
; /* hammer filesystem version to use */
740 int rsv_inodes
; /* reserved space due to dirty inodes */
741 int64_t rsv_databytes
; /* reserved space due to record data */
742 int rsv_recs
; /* reserved space due to dirty records */
743 int rsv_fromdelay
; /* bigblocks reserved due to flush delay */
744 int undo_rec_limit
; /* based on size of undo area */
746 int count_newrecords
;
748 int inode_reclaims
; /* inodes pending reclaim by flusher */
749 int count_inodes
; /* total number of inodes */
750 int count_iqueued
; /* inodes queued to flusher */
752 struct hammer_flusher flusher
;
754 u_int check_interrupt
;
757 struct hammer_io_list volu_list
; /* dirty undo buffers */
758 struct hammer_io_list undo_list
; /* dirty undo buffers */
759 struct hammer_io_list data_list
; /* dirty data buffers */
760 struct hammer_io_list alt_data_list
; /* dirty data buffers */
761 struct hammer_io_list meta_list
; /* dirty meta bufs */
762 struct hammer_io_list lose_list
; /* loose buffers */
763 int locked_dirty_space
; /* meta/volu count */
764 int io_running_space
;
765 int objid_cache_count
;
766 int error
; /* critical I/O error */
767 struct krate krate
; /* rate limited kprintf */
768 hammer_tid_t asof
; /* snapshot mount */
769 hammer_tid_t next_tid
;
770 hammer_tid_t flush_tid1
; /* flusher tid sequencing */
771 hammer_tid_t flush_tid2
; /* flusher tid sequencing */
772 int64_t copy_stat_freebigblocks
; /* number of free bigblocks */
774 struct netexport export
;
775 struct hammer_lock sync_lock
;
776 struct hammer_lock free_lock
;
777 struct hammer_lock undo_lock
;
778 struct hammer_lock blkmap_lock
;
779 struct hammer_blockmap blockmap
[HAMMER_MAX_ZONES
];
780 struct hammer_undo undos
[HAMMER_MAX_UNDOS
];
782 TAILQ_HEAD(, hammer_undo
) undo_lru_list
;
783 TAILQ_HEAD(, hammer_reserve
) delay_list
;
784 struct hammer_flush_group_list flush_group_list
;
785 hammer_flush_group_t next_flush_group
;
786 TAILQ_HEAD(, hammer_objid_cache
) objid_cache_list
;
787 TAILQ_HEAD(, hammer_reclaim
) reclaim_list
;
790 typedef struct hammer_mount
*hammer_mount_t
;
792 #define HAMMER_MOUNT_CRITICAL_ERROR 0x0001
793 #define HAMMER_MOUNT_FLUSH_RECOVERY 0x0002
795 struct hammer_sync_info
{
803 * checkspace slop (8MB chunks), higher numbers are more conservative.
805 #define HAMMER_CHKSPC_REBLOCK 25
806 #define HAMMER_CHKSPC_MIRROR 20
807 #define HAMMER_CHKSPC_WRITE 20
808 #define HAMMER_CHKSPC_CREATE 20
809 #define HAMMER_CHKSPC_REMOVE 10
810 #define HAMMER_CHKSPC_EMERGENCY 0
814 extern struct vop_ops hammer_vnode_vops
;
815 extern struct vop_ops hammer_spec_vops
;
816 extern struct vop_ops hammer_fifo_vops
;
817 extern struct bio_ops hammer_bioops
;
819 extern int hammer_debug_io
;
820 extern int hammer_debug_general
;
821 extern int hammer_debug_debug
;
822 extern int hammer_debug_inode
;
823 extern int hammer_debug_locks
;
824 extern int hammer_debug_btree
;
825 extern int hammer_debug_tid
;
826 extern int hammer_debug_recover
;
827 extern int hammer_debug_recover_faults
;
828 extern int hammer_cluster_enable
;
829 extern int hammer_count_fsyncs
;
830 extern int hammer_count_inodes
;
831 extern int hammer_count_iqueued
;
832 extern int hammer_count_reclaiming
;
833 extern int hammer_count_records
;
834 extern int hammer_count_record_datas
;
835 extern int hammer_count_volumes
;
836 extern int hammer_count_buffers
;
837 extern int hammer_count_nodes
;
838 extern int64_t hammer_count_extra_space_used
;
839 extern int64_t hammer_stats_btree_lookups
;
840 extern int64_t hammer_stats_btree_searches
;
841 extern int64_t hammer_stats_btree_inserts
;
842 extern int64_t hammer_stats_btree_deletes
;
843 extern int64_t hammer_stats_btree_elements
;
844 extern int64_t hammer_stats_btree_splits
;
845 extern int64_t hammer_stats_btree_iterations
;
846 extern int64_t hammer_stats_btree_root_iterations
;
847 extern int64_t hammer_stats_record_iterations
;
848 extern int64_t hammer_stats_file_read
;
849 extern int64_t hammer_stats_file_write
;
850 extern int64_t hammer_stats_file_iopsr
;
851 extern int64_t hammer_stats_file_iopsw
;
852 extern int64_t hammer_stats_disk_read
;
853 extern int64_t hammer_stats_disk_write
;
854 extern int64_t hammer_stats_inode_flushes
;
855 extern int64_t hammer_stats_commits
;
856 extern int hammer_count_dirtybufspace
;
857 extern int hammer_count_refedbufs
;
858 extern int hammer_count_reservations
;
859 extern int hammer_count_io_running_read
;
860 extern int hammer_count_io_running_write
;
861 extern int hammer_count_io_locked
;
862 extern int hammer_limit_dirtybufspace
;
863 extern int hammer_limit_recs
;
864 extern int hammer_limit_inode_recs
;
865 extern int hammer_bio_count
;
866 extern int hammer_verify_zone
;
867 extern int hammer_verify_data
;
868 extern int hammer_write_mode
;
869 extern int hammer_yield_check
;
870 extern int hammer_fsync_mode
;
871 extern int hammer_autoflush
;
872 extern int64_t hammer_contention_count
;
874 void hammer_critical_error(hammer_mount_t hmp
, hammer_inode_t ip
,
875 int error
, const char *msg
);
876 int hammer_vop_inactive(struct vop_inactive_args
*);
877 int hammer_vop_reclaim(struct vop_reclaim_args
*);
878 int hammer_get_vnode(struct hammer_inode
*ip
, struct vnode
**vpp
);
879 struct hammer_inode
*hammer_get_inode(hammer_transaction_t trans
,
880 hammer_inode_t dip
, int64_t obj_id
,
881 hammer_tid_t asof
, u_int32_t localization
,
882 int flags
, int *errorp
);
883 struct hammer_inode
*hammer_get_dummy_inode(hammer_transaction_t trans
,
884 hammer_inode_t dip
, int64_t obj_id
,
885 hammer_tid_t asof
, u_int32_t localization
,
886 int flags
, int *errorp
);
887 struct hammer_inode
*hammer_find_inode(hammer_transaction_t trans
,
888 int64_t obj_id
, hammer_tid_t asof
,
889 u_int32_t localization
);
890 void hammer_scan_inode_snapshots(hammer_mount_t hmp
,
891 hammer_inode_info_t iinfo
,
892 int (*callback
)(hammer_inode_t ip
, void *data
),
894 void hammer_put_inode(struct hammer_inode
*ip
);
895 void hammer_put_inode_ref(struct hammer_inode
*ip
);
896 void hammer_inode_waitreclaims(hammer_mount_t hmp
);
897 void hammer_inode_waithard(hammer_mount_t hmp
);
899 int hammer_unload_volume(hammer_volume_t volume
, void *data __unused
);
900 int hammer_adjust_volume_mode(hammer_volume_t volume
, void *data __unused
);
902 int hammer_unload_buffer(hammer_buffer_t buffer
, void *data __unused
);
903 int hammer_install_volume(hammer_mount_t hmp
, const char *volname
,
904 struct vnode
*devvp
);
905 int hammer_mountcheck_volumes(hammer_mount_t hmp
);
907 int hammer_mem_add(hammer_record_t record
);
908 int hammer_ip_lookup(hammer_cursor_t cursor
);
909 int hammer_ip_first(hammer_cursor_t cursor
);
910 int hammer_ip_next(hammer_cursor_t cursor
);
911 int hammer_ip_resolve_data(hammer_cursor_t cursor
);
912 int hammer_ip_delete_record(hammer_cursor_t cursor
, hammer_inode_t ip
,
914 int hammer_delete_at_cursor(hammer_cursor_t cursor
, int delete_flags
,
915 hammer_tid_t delete_tid
, u_int32_t delete_ts
,
916 int track
, int64_t *stat_bytes
);
917 int hammer_ip_check_directory_empty(hammer_transaction_t trans
,
919 int hammer_sync_hmp(hammer_mount_t hmp
, int waitfor
);
920 int hammer_queue_inodes_flusher(hammer_mount_t hmp
, int waitfor
);
923 hammer_alloc_mem_record(hammer_inode_t ip
, int data_len
);
924 void hammer_flush_record_done(hammer_record_t record
, int error
);
925 void hammer_wait_mem_record_ident(hammer_record_t record
, const char *ident
);
926 void hammer_rel_mem_record(hammer_record_t record
);
928 int hammer_cursor_up(hammer_cursor_t cursor
);
929 int hammer_cursor_up_locked(hammer_cursor_t cursor
);
930 int hammer_cursor_down(hammer_cursor_t cursor
);
931 int hammer_cursor_upgrade(hammer_cursor_t cursor
);
932 int hammer_cursor_upgrade_node(hammer_cursor_t cursor
);
933 void hammer_cursor_downgrade(hammer_cursor_t cursor
);
934 int hammer_cursor_seek(hammer_cursor_t cursor
, hammer_node_t node
,
936 void hammer_lock_ex_ident(struct hammer_lock
*lock
, const char *ident
);
937 int hammer_lock_ex_try(struct hammer_lock
*lock
);
938 void hammer_lock_sh(struct hammer_lock
*lock
);
939 int hammer_lock_sh_try(struct hammer_lock
*lock
);
940 int hammer_lock_upgrade(struct hammer_lock
*lock
);
941 void hammer_lock_downgrade(struct hammer_lock
*lock
);
942 int hammer_lock_status(struct hammer_lock
*lock
);
943 void hammer_unlock(struct hammer_lock
*lock
);
944 void hammer_ref(struct hammer_lock
*lock
);
945 void hammer_unref(struct hammer_lock
*lock
);
947 void hammer_sync_lock_ex(hammer_transaction_t trans
);
948 void hammer_sync_lock_sh(hammer_transaction_t trans
);
949 int hammer_sync_lock_sh_try(hammer_transaction_t trans
);
950 void hammer_sync_unlock(hammer_transaction_t trans
);
952 u_int32_t
hammer_to_unix_xid(uuid_t
*uuid
);
953 void hammer_guid_to_uuid(uuid_t
*uuid
, u_int32_t guid
);
954 void hammer_time_to_timespec(u_int64_t xtime
, struct timespec
*ts
);
955 u_int64_t
hammer_timespec_to_time(struct timespec
*ts
);
956 int hammer_str_to_tid(const char *str
, int *ispfsp
,
957 hammer_tid_t
*tidp
, u_int32_t
*localizationp
);
958 int hammer_is_atatext(const char *name
, int len
);
959 hammer_tid_t
hammer_alloc_objid(hammer_mount_t hmp
, hammer_inode_t dip
,
961 void hammer_clear_objid(hammer_inode_t dip
);
962 void hammer_destroy_objid_cache(hammer_mount_t hmp
);
964 int hammer_enter_undo_history(hammer_mount_t hmp
, hammer_off_t offset
,
966 void hammer_clear_undo_history(hammer_mount_t hmp
);
967 enum vtype
hammer_get_vnode_type(u_int8_t obj_type
);
968 int hammer_get_dtype(u_int8_t obj_type
);
969 u_int8_t
hammer_get_obj_type(enum vtype vtype
);
970 int64_t hammer_directory_namekey(hammer_inode_t dip
, const void *name
, int len
,
971 u_int32_t
*max_iterationsp
);
972 int hammer_nohistory(hammer_inode_t ip
);
974 int hammer_init_cursor(hammer_transaction_t trans
, hammer_cursor_t cursor
,
975 hammer_node_cache_t cache
, hammer_inode_t ip
);
976 void hammer_normalize_cursor(hammer_cursor_t cursor
);
977 void hammer_done_cursor(hammer_cursor_t cursor
);
978 int hammer_recover_cursor(hammer_cursor_t cursor
);
979 void hammer_unlock_cursor(hammer_cursor_t cursor
);
980 int hammer_lock_cursor(hammer_cursor_t cursor
);
981 hammer_cursor_t
hammer_push_cursor(hammer_cursor_t ocursor
);
982 void hammer_pop_cursor(hammer_cursor_t ocursor
, hammer_cursor_t ncursor
);
984 void hammer_cursor_replaced_node(hammer_node_t onode
, hammer_node_t nnode
);
985 void hammer_cursor_removed_node(hammer_node_t onode
, hammer_node_t parent
,
987 void hammer_cursor_split_node(hammer_node_t onode
, hammer_node_t nnode
,
989 void hammer_cursor_moved_element(hammer_node_t onode
, hammer_node_t nnode
,
990 int oindex
, int nindex
);
991 void hammer_cursor_parent_changed(hammer_node_t node
, hammer_node_t oparent
,
992 hammer_node_t nparent
, int nindex
);
993 void hammer_cursor_inserted_element(hammer_node_t node
, int index
);
994 void hammer_cursor_deleted_element(hammer_node_t node
, int index
);
996 int hammer_btree_lookup(hammer_cursor_t cursor
);
997 int hammer_btree_first(hammer_cursor_t cursor
);
998 int hammer_btree_last(hammer_cursor_t cursor
);
999 int hammer_btree_extract(hammer_cursor_t cursor
, int flags
);
1000 int hammer_btree_iterate(hammer_cursor_t cursor
);
1001 int hammer_btree_iterate_reverse(hammer_cursor_t cursor
);
1002 int hammer_btree_insert(hammer_cursor_t cursor
,
1003 hammer_btree_leaf_elm_t elm
, int *doprop
);
1004 int hammer_btree_delete(hammer_cursor_t cursor
);
1005 void hammer_btree_do_propagation(hammer_cursor_t cursor
,
1006 hammer_pseudofs_inmem_t pfsm
,
1007 hammer_btree_leaf_elm_t leaf
);
1008 int hammer_btree_cmp(hammer_base_elm_t key1
, hammer_base_elm_t key2
);
1009 int hammer_btree_chkts(hammer_tid_t ts
, hammer_base_elm_t key
);
1010 int hammer_btree_correct_rhb(hammer_cursor_t cursor
, hammer_tid_t tid
);
1011 int hammer_btree_correct_lhb(hammer_cursor_t cursor
, hammer_tid_t tid
);
1013 int btree_set_parent(hammer_transaction_t trans
, hammer_node_t node
,
1014 hammer_btree_elm_t elm
);
1015 void hammer_node_lock_init(hammer_node_lock_t parent
, hammer_node_t node
);
1016 int hammer_btree_lock_children(hammer_cursor_t cursor
, int depth
,
1017 hammer_node_lock_t parent
);
1018 void hammer_btree_lock_copy(hammer_cursor_t cursor
,
1019 hammer_node_lock_t parent
);
1020 int hammer_btree_sync_copy(hammer_cursor_t cursor
,
1021 hammer_node_lock_t parent
);
1022 void hammer_btree_unlock_children(hammer_cursor_t cursor
,
1023 hammer_node_lock_t parent
);
1024 int hammer_btree_search_node(hammer_base_elm_t elm
, hammer_node_ondisk_t node
);
1025 hammer_node_t
hammer_btree_get_parent(hammer_transaction_t trans
,
1026 hammer_node_t node
, int *parent_indexp
,
1027 int *errorp
, int try_exclusive
);
1029 void hammer_print_btree_node(hammer_node_ondisk_t ondisk
);
1030 void hammer_print_btree_elm(hammer_btree_elm_t elm
, u_int8_t type
, int i
);
1032 void *hammer_bread(struct hammer_mount
*hmp
, hammer_off_t off
,
1033 int *errorp
, struct hammer_buffer
**bufferp
);
1034 void *hammer_bnew(struct hammer_mount
*hmp
, hammer_off_t off
,
1035 int *errorp
, struct hammer_buffer
**bufferp
);
1036 void *hammer_bread_ext(struct hammer_mount
*hmp
, hammer_off_t off
, int bytes
,
1037 int *errorp
, struct hammer_buffer
**bufferp
);
1038 void *hammer_bnew_ext(struct hammer_mount
*hmp
, hammer_off_t off
, int bytes
,
1039 int *errorp
, struct hammer_buffer
**bufferp
);
1041 hammer_volume_t
hammer_get_root_volume(hammer_mount_t hmp
, int *errorp
);
1043 hammer_volume_t
hammer_get_volume(hammer_mount_t hmp
,
1044 int32_t vol_no
, int *errorp
);
1045 hammer_buffer_t
hammer_get_buffer(hammer_mount_t hmp
, hammer_off_t buf_offset
,
1046 int bytes
, int isnew
, int *errorp
);
1047 void hammer_sync_buffers(hammer_mount_t hmp
,
1048 hammer_off_t base_offset
, int bytes
);
1049 int hammer_del_buffers(hammer_mount_t hmp
,
1050 hammer_off_t base_offset
,
1051 hammer_off_t zone2_offset
, int bytes
,
1052 int report_conflicts
);
1054 int hammer_ref_volume(hammer_volume_t volume
);
1055 int hammer_ref_buffer(hammer_buffer_t buffer
);
1056 void hammer_flush_buffer_nodes(hammer_buffer_t buffer
);
1058 void hammer_rel_volume(hammer_volume_t volume
, int flush
);
1059 void hammer_rel_buffer(hammer_buffer_t buffer
, int flush
);
1061 int hammer_vfs_export(struct mount
*mp
, int op
,
1062 const struct export_args
*export
);
1063 hammer_node_t
hammer_get_node(hammer_transaction_t trans
,
1064 hammer_off_t node_offset
, int isnew
, int *errorp
);
1065 void hammer_ref_node(hammer_node_t node
);
1066 hammer_node_t
hammer_ref_node_safe(hammer_transaction_t trans
,
1067 hammer_node_cache_t cache
, int *errorp
);
1068 void hammer_rel_node(hammer_node_t node
);
1069 void hammer_delete_node(hammer_transaction_t trans
,
1070 hammer_node_t node
);
1071 void hammer_cache_node(hammer_node_cache_t cache
,
1072 hammer_node_t node
);
1073 void hammer_uncache_node(hammer_node_cache_t cache
);
1074 void hammer_flush_node(hammer_node_t node
);
1076 void hammer_dup_buffer(struct hammer_buffer
**bufferp
,
1077 struct hammer_buffer
*buffer
);
1078 hammer_node_t
hammer_alloc_btree(hammer_transaction_t trans
,
1079 hammer_off_t hint
, int *errorp
);
1080 void *hammer_alloc_data(hammer_transaction_t trans
, int32_t data_len
,
1081 u_int16_t rec_type
, hammer_off_t
*data_offsetp
,
1082 struct hammer_buffer
**data_bufferp
,
1083 hammer_off_t hint
, int *errorp
);
1085 int hammer_generate_undo(hammer_transaction_t trans
, hammer_io_t io
,
1086 hammer_off_t zone1_offset
, void *base
, int len
);
1088 void hammer_put_volume(struct hammer_volume
*volume
, int flush
);
1089 void hammer_put_buffer(struct hammer_buffer
*buffer
, int flush
);
1091 hammer_off_t
hammer_freemap_alloc(hammer_transaction_t trans
,
1092 hammer_off_t owner
, int *errorp
);
1093 void hammer_freemap_free(hammer_transaction_t trans
, hammer_off_t phys_offset
,
1094 hammer_off_t owner
, int *errorp
);
1095 int _hammer_checkspace(hammer_mount_t hmp
, int slop
, int64_t *resp
);
1096 hammer_off_t
hammer_blockmap_alloc(hammer_transaction_t trans
, int zone
,
1097 int bytes
, hammer_off_t hint
, int *errorp
);
1098 hammer_reserve_t
hammer_blockmap_reserve(hammer_mount_t hmp
, int zone
,
1099 int bytes
, hammer_off_t
*zone_offp
, int *errorp
);
1100 void hammer_blockmap_reserve_complete(hammer_mount_t hmp
,
1101 hammer_reserve_t resv
);
1102 void hammer_reserve_clrdelay(hammer_mount_t hmp
, hammer_reserve_t resv
);
1103 void hammer_blockmap_free(hammer_transaction_t trans
,
1104 hammer_off_t bmap_off
, int bytes
);
1105 int hammer_blockmap_finalize(hammer_transaction_t trans
,
1106 hammer_reserve_t resv
,
1107 hammer_off_t bmap_off
, int bytes
);
1108 int hammer_blockmap_getfree(hammer_mount_t hmp
, hammer_off_t bmap_off
,
1109 int *curp
, int *errorp
);
1110 hammer_off_t
hammer_blockmap_lookup(hammer_mount_t hmp
, hammer_off_t bmap_off
,
1112 hammer_off_t
hammer_undo_lookup(hammer_mount_t hmp
, hammer_off_t bmap_off
,
1114 int64_t hammer_undo_used(hammer_transaction_t trans
);
1115 int64_t hammer_undo_space(hammer_transaction_t trans
);
1116 int64_t hammer_undo_max(hammer_mount_t hmp
);
1117 int hammer_undo_reclaim(hammer_io_t io
);
1119 void hammer_start_transaction(struct hammer_transaction
*trans
,
1120 struct hammer_mount
*hmp
);
1121 void hammer_simple_transaction(struct hammer_transaction
*trans
,
1122 struct hammer_mount
*hmp
);
1123 void hammer_start_transaction_fls(struct hammer_transaction
*trans
,
1124 struct hammer_mount
*hmp
);
1125 void hammer_done_transaction(struct hammer_transaction
*trans
);
1127 void hammer_modify_inode(hammer_inode_t ip
, int flags
);
1128 void hammer_flush_inode(hammer_inode_t ip
, int flags
);
1129 void hammer_flush_inode_done(hammer_inode_t ip
, int error
);
1130 void hammer_wait_inode(hammer_inode_t ip
);
1132 int hammer_create_inode(struct hammer_transaction
*trans
, struct vattr
*vap
,
1133 struct ucred
*cred
, struct hammer_inode
*dip
,
1134 const char *name
, int namelen
,
1135 hammer_pseudofs_inmem_t pfsm
,
1136 struct hammer_inode
**ipp
);
1137 void hammer_rel_inode(hammer_inode_t ip
, int flush
);
1138 int hammer_reload_inode(hammer_inode_t ip
, void *arg __unused
);
1139 int hammer_ino_rb_compare(hammer_inode_t ip1
, hammer_inode_t ip2
);
1140 int hammer_destroy_inode_callback(hammer_inode_t ip
, void *data __unused
);
1142 int hammer_sync_inode(hammer_transaction_t trans
, hammer_inode_t ip
);
1143 void hammer_test_inode(hammer_inode_t dip
);
1144 void hammer_inode_unloadable_check(hammer_inode_t ip
, int getvp
);
1146 int hammer_ip_add_directory(struct hammer_transaction
*trans
,
1147 hammer_inode_t dip
, const char *name
, int bytes
,
1148 hammer_inode_t nip
);
1149 int hammer_ip_del_directory(struct hammer_transaction
*trans
,
1150 hammer_cursor_t cursor
, hammer_inode_t dip
,
1152 hammer_record_t
hammer_ip_add_bulk(hammer_inode_t ip
, off_t file_offset
,
1153 void *data
, int bytes
, int *errorp
);
1154 int hammer_ip_frontend_trunc(struct hammer_inode
*ip
, off_t file_size
);
1155 int hammer_ip_add_record(struct hammer_transaction
*trans
,
1156 hammer_record_t record
);
1157 int hammer_ip_delete_range(hammer_cursor_t cursor
, hammer_inode_t ip
,
1158 int64_t ran_beg
, int64_t ran_end
, int truncating
);
1159 int hammer_ip_delete_clean(hammer_cursor_t cursor
, hammer_inode_t ip
,
1161 int hammer_ip_sync_data(hammer_cursor_t cursor
, hammer_inode_t ip
,
1162 int64_t offset
, void *data
, int bytes
);
1163 int hammer_ip_sync_record(hammer_transaction_t trans
, hammer_record_t rec
);
1164 int hammer_ip_sync_record_cursor(hammer_cursor_t cursor
, hammer_record_t rec
);
1165 hammer_pseudofs_inmem_t
hammer_load_pseudofs(hammer_transaction_t trans
,
1166 u_int32_t localization
, int *errorp
);
1167 int hammer_mkroot_pseudofs(hammer_transaction_t trans
, struct ucred
*cred
,
1168 hammer_pseudofs_inmem_t pfsm
);
1169 int hammer_save_pseudofs(hammer_transaction_t trans
,
1170 hammer_pseudofs_inmem_t pfsm
);
1171 int hammer_unload_pseudofs(hammer_transaction_t trans
, u_int32_t localization
);
1172 void hammer_rel_pseudofs(hammer_mount_t hmp
, hammer_pseudofs_inmem_t pfsm
);
1173 int hammer_ioctl(hammer_inode_t ip
, u_long com
, caddr_t data
, int fflag
,
1174 struct ucred
*cred
);
1176 void hammer_io_init(hammer_io_t io
, hammer_volume_t volume
,
1177 enum hammer_io_type type
);
1178 int hammer_io_read(struct vnode
*devvp
, struct hammer_io
*io
,
1179 hammer_off_t limit
);
1180 int hammer_io_new(struct vnode
*devvp
, struct hammer_io
*io
);
1181 int hammer_io_inval(hammer_volume_t volume
, hammer_off_t zone2_offset
);
1182 struct buf
*hammer_io_release(struct hammer_io
*io
, int flush
);
1183 void hammer_io_flush(struct hammer_io
*io
, int reclaim
);
1184 void hammer_io_wait(struct hammer_io
*io
);
1185 void hammer_io_waitdep(struct hammer_io
*io
);
1186 void hammer_io_wait_all(hammer_mount_t hmp
, const char *ident
);
1187 int hammer_io_direct_read(hammer_mount_t hmp
, struct bio
*bio
,
1188 hammer_btree_leaf_elm_t leaf
);
1189 int hammer_io_direct_write(hammer_mount_t hmp
, hammer_record_t record
,
1191 void hammer_io_direct_wait(hammer_record_t record
);
1192 void hammer_io_direct_uncache(hammer_mount_t hmp
, hammer_btree_leaf_elm_t leaf
);
1193 void hammer_io_write_interlock(hammer_io_t io
);
1194 void hammer_io_done_interlock(hammer_io_t io
);
1195 void hammer_io_clear_modify(struct hammer_io
*io
, int inval
);
1196 void hammer_io_clear_modlist(struct hammer_io
*io
);
1197 void hammer_io_flush_sync(hammer_mount_t hmp
);
1199 void hammer_modify_volume(hammer_transaction_t trans
, hammer_volume_t volume
,
1200 void *base
, int len
);
1201 void hammer_modify_buffer(hammer_transaction_t trans
, hammer_buffer_t buffer
,
1202 void *base
, int len
);
1203 void hammer_modify_volume_done(hammer_volume_t volume
);
1204 void hammer_modify_buffer_done(hammer_buffer_t buffer
);
1206 int hammer_ioc_reblock(hammer_transaction_t trans
, hammer_inode_t ip
,
1207 struct hammer_ioc_reblock
*reblock
);
1208 int hammer_ioc_rebalance(hammer_transaction_t trans
, hammer_inode_t ip
,
1209 struct hammer_ioc_rebalance
*rebal
);
1210 int hammer_ioc_prune(hammer_transaction_t trans
, hammer_inode_t ip
,
1211 struct hammer_ioc_prune
*prune
);
1212 int hammer_ioc_mirror_read(hammer_transaction_t trans
, hammer_inode_t ip
,
1213 struct hammer_ioc_mirror_rw
*mirror
);
1214 int hammer_ioc_mirror_write(hammer_transaction_t trans
, hammer_inode_t ip
,
1215 struct hammer_ioc_mirror_rw
*mirror
);
1216 int hammer_ioc_set_pseudofs(hammer_transaction_t trans
, hammer_inode_t ip
,
1217 struct ucred
*cred
, struct hammer_ioc_pseudofs_rw
*pfs
);
1218 int hammer_ioc_get_pseudofs(hammer_transaction_t trans
, hammer_inode_t ip
,
1219 struct hammer_ioc_pseudofs_rw
*pfs
);
1220 int hammer_ioc_destroy_pseudofs(hammer_transaction_t trans
, hammer_inode_t ip
,
1221 struct hammer_ioc_pseudofs_rw
*pfs
);
1222 int hammer_ioc_downgrade_pseudofs(hammer_transaction_t trans
, hammer_inode_t ip
,
1223 struct hammer_ioc_pseudofs_rw
*pfs
);
1224 int hammer_ioc_upgrade_pseudofs(hammer_transaction_t trans
, hammer_inode_t ip
,
1225 struct hammer_ioc_pseudofs_rw
*pfs
);
1226 int hammer_ioc_wait_pseudofs(hammer_transaction_t trans
, hammer_inode_t ip
,
1227 struct hammer_ioc_pseudofs_rw
*pfs
);
1228 int hammer_ioc_expand(hammer_transaction_t trans
, hammer_inode_t ip
,
1229 struct hammer_ioc_expand
*expand
);
1231 int hammer_signal_check(hammer_mount_t hmp
);
1233 void hammer_flusher_create(hammer_mount_t hmp
);
1234 void hammer_flusher_destroy(hammer_mount_t hmp
);
1235 void hammer_flusher_sync(hammer_mount_t hmp
);
1236 int hammer_flusher_async(hammer_mount_t hmp
, hammer_flush_group_t flg
);
1237 int hammer_flusher_async_one(hammer_mount_t hmp
);
1238 void hammer_flusher_wait(hammer_mount_t hmp
, int seq
);
1239 void hammer_flusher_wait_next(hammer_mount_t hmp
);
1240 int hammer_flusher_meta_limit(hammer_mount_t hmp
);
1241 int hammer_flusher_meta_halflimit(hammer_mount_t hmp
);
1242 int hammer_flusher_undo_exhausted(hammer_transaction_t trans
, int quarter
);
1243 void hammer_flusher_clean_loose_ios(hammer_mount_t hmp
);
1244 void hammer_flusher_finalize(hammer_transaction_t trans
, int final
);
1245 int hammer_flusher_haswork(hammer_mount_t hmp
);
1248 int hammer_recover(hammer_mount_t hmp
, hammer_volume_t rootvol
);
1249 void hammer_recover_flush_buffers(hammer_mount_t hmp
,
1250 hammer_volume_t root_volume
, int final
);
1252 void hammer_crc_set_blockmap(hammer_blockmap_t blockmap
);
1253 void hammer_crc_set_volume(hammer_volume_ondisk_t ondisk
);
1254 void hammer_crc_set_leaf(void *data
, hammer_btree_leaf_elm_t leaf
);
1256 int hammer_crc_test_blockmap(hammer_blockmap_t blockmap
);
1257 int hammer_crc_test_volume(hammer_volume_ondisk_t ondisk
);
1258 int hammer_crc_test_btree(hammer_node_ondisk_t ondisk
);
1259 int hammer_crc_test_leaf(void *data
, hammer_btree_leaf_elm_t leaf
);
1260 void hkprintf(const char *ctl
, ...);
1261 udev_t
hammer_fsid_to_udev(uuid_t
*uuid
);
1264 int hammer_blocksize(int64_t file_offset
);
1265 int64_t hammer_blockdemarc(int64_t file_offset1
, int64_t file_offset2
);
1268 * Shortcut for _hammer_checkspace(), used all over the code.
1271 hammer_checkspace(hammer_mount_t hmp
, int slop
)
1273 return(_hammer_checkspace(hmp
, slop
, NULL
));
1278 static __inline
void
1279 hammer_wait_mem_record(hammer_record_t record
)
1281 hammer_wait_mem_record_ident(record
, "hmmwai");
1284 static __inline
void
1285 hammer_lock_ex(struct hammer_lock
*lock
)
1287 hammer_lock_ex_ident(lock
, "hmrlck");
1291 * Indicate that a B-Tree node is being modified.
1293 static __inline
void
1294 hammer_modify_node_noundo(hammer_transaction_t trans
, hammer_node_t node
)
1296 KKASSERT((node
->flags
& HAMMER_NODE_CRCBAD
) == 0);
1297 hammer_modify_buffer(trans
, node
->buffer
, NULL
, 0);
1300 static __inline
void
1301 hammer_modify_node_all(hammer_transaction_t trans
, struct hammer_node
*node
)
1303 KKASSERT((node
->flags
& HAMMER_NODE_CRCBAD
) == 0);
1304 hammer_modify_buffer(trans
, node
->buffer
,
1305 node
->ondisk
, sizeof(*node
->ondisk
));
1308 static __inline
void
1309 hammer_modify_node(hammer_transaction_t trans
, hammer_node_t node
,
1310 void *base
, int len
)
1312 hammer_crc_t
*crcptr
;
1314 KKASSERT((char *)base
>= (char *)node
->ondisk
&&
1315 (char *)base
+ len
<=
1316 (char *)node
->ondisk
+ sizeof(*node
->ondisk
));
1317 KKASSERT((node
->flags
& HAMMER_NODE_CRCBAD
) == 0);
1318 hammer_modify_buffer(trans
, node
->buffer
, base
, len
);
1319 crcptr
= &node
->ondisk
->crc
;
1320 hammer_modify_buffer(trans
, node
->buffer
, crcptr
, sizeof(hammer_crc_t
));
1321 --node
->buffer
->io
.modify_refs
; /* only want one ref */
1325 * Indicate that the specified modifications have been completed.
1327 * Do not try to generate the crc here, it's very expensive to do and a
1328 * sequence of insertions or deletions can result in many calls to this
1329 * function on the same node.
1331 static __inline
void
1332 hammer_modify_node_done(hammer_node_t node
)
1334 node
->flags
|= HAMMER_NODE_CRCGOOD
;
1335 if ((node
->flags
& HAMMER_NODE_NEEDSCRC
) == 0) {
1336 node
->flags
|= HAMMER_NODE_NEEDSCRC
;
1337 node
->buffer
->io
.gencrc
= 1;
1338 hammer_ref_node(node
);
1340 hammer_modify_buffer_done(node
->buffer
);
1343 #define hammer_modify_volume_field(trans, vol, field) \
1344 hammer_modify_volume(trans, vol, &(vol)->ondisk->field, \
1345 sizeof((vol)->ondisk->field))
1347 #define hammer_modify_node_field(trans, node, field) \
1348 hammer_modify_node(trans, node, &(node)->ondisk->field, \
1349 sizeof((node)->ondisk->field))
1352 * The HAMMER_INODE_CAP_DIR_LOCAL_INO capability is set on newly
1353 * created directories for HAMMER version 2 or greater and causes
1354 * directory entries to be placed the inode localization zone in
1355 * the B-Tree instead of the misc zone.
1357 * This greatly improves localization between directory entries and
1360 static __inline u_int32_t
1361 hammer_dir_localization(hammer_inode_t dip
)
1363 if (dip
->ino_data
.cap_flags
& HAMMER_INODE_CAP_DIR_LOCAL_INO
)
1364 return(HAMMER_LOCALIZE_INODE
);
1366 return(HAMMER_LOCALIZE_MISC
);