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 1.73 2008/06/03 18:47:25 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>
57 #include <sys/globaldata.h>
60 #include <sys/signal2.h>
61 #include "hammer_disk.h"
62 #include "hammer_mount.h"
63 #include "hammer_ioctl.h"
65 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
67 MALLOC_DECLARE(M_HAMMER);
72 * Key structure used for custom RB tree inode lookups. This prototypes
73 * the function hammer_ino_rb_tree_RB_LOOKUP_INFO(root, info).
75 typedef struct hammer_inode_info {
76 int64_t obj_id; /* (key) object identifier */
77 hammer_tid_t obj_asof; /* (key) snapshot transid or 0 */
78 } *hammer_inode_info_t;
80 typedef enum hammer_transaction_type {
84 } hammer_transaction_type_t;
87 * HAMMER Transaction tracking
89 struct hammer_transaction {
90 hammer_transaction_type_t type;
91 struct hammer_mount *hmp;
95 struct hammer_volume *rootvol;
98 typedef struct hammer_transaction *hammer_transaction_t;
104 int refs; /* active references delay writes */
105 int lockcount; /* lock count for exclusive/shared access */
107 struct thread *locktd;
111 hammer_islocked(struct hammer_lock *lock)
113 return(lock->lockcount != 0);
117 hammer_isactive(struct hammer_lock *lock)
119 return(lock->refs != 0);
123 hammer_islastref(struct hammer_lock *lock)
125 return(lock->refs == 1);
129 * Return if we specifically own the lock exclusively.
132 hammer_lock_excl_owned(struct hammer_lock *lock, thread_t td)
134 if (lock->lockcount > 0 && lock->locktd == td)
140 * Flush state, used by various structures
142 typedef enum hammer_inode_state {
146 } hammer_inode_state_t;
148 TAILQ_HEAD(hammer_record_list, hammer_record);
151 * Cache object ids. A fixed number of objid cache structures are
152 * created to reserve object id's for newly created files in multiples
153 * of 100,000, localized to a particular directory, and recycled as
154 * needed. This allows parallel create operations in different
155 * directories to retain fairly localized object ids which in turn
156 * improves reblocking performance and layout.
158 #define OBJID_CACHE_SIZE 128
159 #define OBJID_CACHE_BULK 100000
161 typedef struct hammer_objid_cache {
162 TAILQ_ENTRY(hammer_objid_cache) entry;
163 struct hammer_inode *dip;
164 hammer_tid_t next_tid;
166 } *hammer_objid_cache_t;
169 * Structure used to represent an inode in-memory.
171 * The record and data associated with an inode may be out of sync with
172 * the disk (xDIRTY flags), or not even on the disk at all (ONDISK flag
175 * An inode may also hold a cache of unsynchronized records, used for
176 * database and directories only. Unsynchronized regular file data is
177 * stored in the buffer cache.
179 * NOTE: A file which is created and destroyed within the initial
180 * synchronization period can wind up not doing any disk I/O at all.
182 * Finally, an inode may cache numerous disk-referencing B-Tree cursors.
184 struct hammer_ino_rb_tree;
186 RB_HEAD(hammer_ino_rb_tree, hammer_inode);
187 RB_PROTOTYPEX(hammer_ino_rb_tree, INFO, hammer_inode, rb_node,
188 hammer_ino_rb_compare, hammer_inode_info_t);
190 struct hammer_rec_rb_tree;
191 struct hammer_record;
192 RB_HEAD(hammer_rec_rb_tree, hammer_record);
193 RB_PROTOTYPEX(hammer_rec_rb_tree, INFO, hammer_record, rb_node,
194 hammer_rec_rb_compare, hammer_base_elm_t);
196 TAILQ_HEAD(hammer_node_list, hammer_node);
198 struct hammer_inode {
199 RB_ENTRY(hammer_inode) rb_node;
200 hammer_inode_state_t flush_state;
202 TAILQ_ENTRY(hammer_inode) flush_entry;
203 struct hammer_record_list target_list; /* target of dependant recs */
204 u_int64_t obj_id; /* (key) object identifier */
205 hammer_tid_t obj_asof; /* (key) snapshot or 0 */
206 struct hammer_mount *hmp;
207 hammer_objid_cache_t objid_cache;
209 int error; /* flush error */
210 int cursor_ip_refs; /* sanity */
211 int rsv_databufs; /* counts towards hmp */
213 struct lockf advlock;
214 struct hammer_lock lock; /* sync copy interlock */
215 TAILQ_HEAD(, bio) bio_list; /* BIOs to flush out */
216 TAILQ_HEAD(, bio) bio_alt_list; /* BIOs to flush out */
218 struct hammer_btree_leaf_elm ino_leaf; /* in-memory cache */
219 struct hammer_inode_data ino_data; /* in-memory cache */
220 struct hammer_rec_rb_tree rec_tree; /* in-memory cache */
221 struct hammer_node *cache[2]; /* search initiate cache */
224 * When a demark is created to synchronize an inode to
225 * disk, certain fields are copied so the front-end VOPs
226 * can continue to run in parallel with the synchronization
227 * occuring in the background.
229 int sync_flags; /* to-sync flags cache */
230 off_t sync_trunc_off; /* to-sync truncation */
231 struct hammer_btree_leaf_elm sync_ino_leaf; /* to-sync cache */
232 struct hammer_inode_data sync_ino_data; /* to-sync cache */
235 typedef struct hammer_inode *hammer_inode_t;
237 #define VTOI(vp) ((struct hammer_inode *)(vp)->v_data)
239 #define HAMMER_INODE_DDIRTY 0x0001 /* in-memory ino_data is dirty */
240 #define HAMMER_INODE_RSV_INODES 0x0002 /* hmp->rsv_inodes bumped */
241 #define HAMMER_INODE_ITIMES 0x0004 /* in-memory mtime/atime modified */
242 #define HAMMER_INODE_XDIRTY 0x0008 /* in-memory records */
243 #define HAMMER_INODE_ONDISK 0x0010 /* inode is on-disk (else not yet) */
244 #define HAMMER_INODE_FLUSH 0x0020 /* flush on last ref */
245 #define HAMMER_INODE_DELETED 0x0080 /* inode delete (backend) */
246 #define HAMMER_INODE_DELONDISK 0x0100 /* delete synchronized to disk */
247 #define HAMMER_INODE_RO 0x0200 /* read-only (because of as-of) */
248 #define HAMMER_INODE_VHELD 0x0400 /* vnode held on sync */
249 #define HAMMER_INODE_DONDISK 0x0800 /* data records may be on disk */
250 #define HAMMER_INODE_BUFS 0x1000 /* dirty high level bps present */
251 #define HAMMER_INODE_REFLUSH 0x2000 /* pipelined flush during flush */
252 #define HAMMER_INODE_WRITE_ALT 0x4000 /* strategy writes to alt bioq */
253 #define HAMMER_INODE_FLUSHW 0x8000 /* Someone waiting for flush */
255 #define HAMMER_INODE_TRUNCATED 0x00010000
256 #define HAMMER_INODE_DELETING 0x00020000 /* inode delete request (frontend)*/
257 #define HAMMER_INODE_RESIGNAL 0x00040000 /* re-signal on re-flush */
259 #define HAMMER_INODE_MODMASK (HAMMER_INODE_DDIRTY| \
260 HAMMER_INODE_XDIRTY|HAMMER_INODE_BUFS| \
261 HAMMER_INODE_ITIMES|HAMMER_INODE_TRUNCATED|\
262 HAMMER_INODE_DELETING)
264 #define HAMMER_INODE_MODMASK_NOXDIRTY \
265 (HAMMER_INODE_MODMASK & ~HAMMER_INODE_XDIRTY)
267 #define HAMMER_MAX_INODE_CURSORS 4
269 #define HAMMER_FLUSH_SIGNAL 0x0001
270 #define HAMMER_FLUSH_RECURSION 0x0002
273 * Structure used to represent an unsynchronized record in-memory. These
274 * records typically represent directory entries. Only non-historical
275 * records are kept in-memory.
277 * Records are organized as a per-inode RB-Tree. If the inode is not
278 * on disk then neither are any records and the in-memory record tree
279 * represents the entire contents of the inode. If the inode is on disk
280 * then the on-disk B-Tree is scanned in parallel with the in-memory
281 * RB-Tree to synthesize the current state of the file.
283 * Records are also used to enforce the ordering of directory create/delete
284 * operations. A new inode will not be flushed to disk unless its related
285 * directory entry is also being flushed at the same time. A directory entry
286 * will not be removed unless its related inode is also being removed at the
289 typedef enum hammer_record_type {
290 HAMMER_MEM_RECORD_GENERAL, /* misc record */
291 HAMMER_MEM_RECORD_INODE, /* inode record */
292 HAMMER_MEM_RECORD_ADD, /* positive memory cache record */
293 HAMMER_MEM_RECORD_DEL /* negative delete-on-disk record */
294 } hammer_record_type_t;
296 struct hammer_record {
297 RB_ENTRY(hammer_record) rb_node;
298 TAILQ_ENTRY(hammer_record) target_entry;
299 hammer_inode_state_t flush_state;
301 hammer_record_type_t type;
302 struct hammer_lock lock;
303 struct hammer_inode *ip;
304 struct hammer_inode *target_ip;
305 struct hammer_btree_leaf_elm leaf;
306 union hammer_data_ondisk *data;
310 typedef struct hammer_record *hammer_record_t;
313 * Record flags. Note that FE can only be set by the frontend if the
314 * record has not been interlocked by the backend w/ BE.
316 #define HAMMER_RECF_ALLOCDATA 0x0001
317 #define HAMMER_RECF_ONRBTREE 0x0002
318 #define HAMMER_RECF_DELETED_FE 0x0004 /* deleted (frontend) */
319 #define HAMMER_RECF_DELETED_BE 0x0008 /* deleted (backend) */
320 #define HAMMER_RECF_UNUSED0010 0x0010
321 #define HAMMER_RECF_INTERLOCK_BE 0x0020 /* backend interlock */
322 #define HAMMER_RECF_WANTED 0x0040
323 #define HAMMER_RECF_CONVERT_DELETE 0x0100 /* special case */
326 * In-memory structures representing on-disk structures.
328 struct hammer_volume;
329 struct hammer_buffer;
332 RB_HEAD(hammer_vol_rb_tree, hammer_volume);
333 RB_HEAD(hammer_buf_rb_tree, hammer_buffer);
334 RB_HEAD(hammer_nod_rb_tree, hammer_node);
335 RB_HEAD(hammer_und_rb_tree, hammer_undo);
337 RB_PROTOTYPE2(hammer_vol_rb_tree, hammer_volume, rb_node,
338 hammer_vol_rb_compare, int32_t);
339 RB_PROTOTYPE2(hammer_buf_rb_tree, hammer_buffer, rb_node,
340 hammer_buf_rb_compare, hammer_off_t);
341 RB_PROTOTYPE2(hammer_nod_rb_tree, hammer_node, rb_node,
342 hammer_nod_rb_compare, hammer_off_t);
343 RB_PROTOTYPE2(hammer_und_rb_tree, hammer_undo, rb_node,
344 hammer_und_rb_compare, hammer_off_t);
347 * IO management - embedded at the head of various in-memory structures
349 * VOLUME - hammer_volume containing meta-data
350 * META_BUFFER - hammer_buffer containing meta-data
351 * DATA_BUFFER - hammer_buffer containing pure-data
353 * Dirty volume headers and dirty meta-data buffers are locked until the
354 * flusher can sequence them out. Dirty pure-data buffers can be written.
355 * Clean buffers can be passively released.
357 typedef enum hammer_io_type {
358 HAMMER_STRUCTURE_VOLUME,
359 HAMMER_STRUCTURE_META_BUFFER,
360 HAMMER_STRUCTURE_UNDO_BUFFER,
361 HAMMER_STRUCTURE_DATA_BUFFER
364 union hammer_io_structure;
368 LIST_ENTRY(worklist) node;
371 TAILQ_HEAD(hammer_io_list, hammer_io);
372 typedef struct hammer_io_list *hammer_io_list_t;
375 struct worklist worklist;
376 struct hammer_lock lock;
377 enum hammer_io_type type;
378 struct hammer_mount *hmp;
379 TAILQ_ENTRY(hammer_io) mod_entry; /* list entry if modified */
380 hammer_io_list_t mod_list;
383 int loading; /* loading/unloading interlock */
386 u_int modified : 1; /* bp's data was modified */
387 u_int released : 1; /* bp released (w/ B_LOCKED set) */
388 u_int running : 1; /* bp write IO in progress */
389 u_int waiting : 1; /* someone is waiting on us */
390 u_int validated : 1; /* ondisk has been validated */
391 u_int waitdep : 1; /* flush waits for dependancies */
392 u_int recovered : 1; /* has recovery ref */
395 typedef struct hammer_io *hammer_io_t;
398 * In-memory volume representing on-disk buffer
400 struct hammer_volume {
402 RB_ENTRY(hammer_volume) rb_node;
403 struct hammer_buf_rb_tree rb_bufs_root;
404 struct hammer_volume_ondisk *ondisk;
406 int64_t nblocks; /* note: special calculation for statfs */
407 int64_t buffer_base; /* base offset of buffer 0 */
408 hammer_off_t maxbuf_off; /* Maximum buffer offset (zone-2) */
409 hammer_off_t maxraw_off; /* Maximum raw offset for device */
415 typedef struct hammer_volume *hammer_volume_t;
418 * In-memory buffer (other then volume, super-cluster, or cluster),
419 * representing an on-disk buffer.
421 struct hammer_buffer {
423 RB_ENTRY(hammer_buffer) rb_node;
425 struct hammer_volume *volume;
426 hammer_off_t zone2_offset;
427 hammer_off_t zoneX_offset;
428 struct hammer_node_list clist;
431 typedef struct hammer_buffer *hammer_buffer_t;
434 * In-memory B-Tree node, representing an on-disk B-Tree node.
436 * This is a hang-on structure which is backed by a hammer_buffer,
437 * indexed by a hammer_cluster, and used for fine-grained locking of
438 * B-Tree nodes in order to properly control lock ordering. A hammer_buffer
439 * can contain multiple nodes representing wildly disassociated portions
440 * of the B-Tree so locking cannot be done on a buffer-by-buffer basis.
442 * This structure uses a cluster-relative index to reduce the number
443 * of layers required to access it, and also because all on-disk B-Tree
444 * references are cluster-relative offsets.
447 struct hammer_lock lock; /* node-by-node lock */
448 TAILQ_ENTRY(hammer_node) entry; /* per-buffer linkage */
449 RB_ENTRY(hammer_node) rb_node; /* per-cluster linkage */
450 hammer_off_t node_offset; /* full offset spec */
451 struct hammer_mount *hmp;
452 struct hammer_buffer *buffer; /* backing buffer */
453 hammer_node_ondisk_t ondisk; /* ptr to on-disk structure */
454 struct hammer_node **cache1; /* passive cache(s) */
455 struct hammer_node **cache2;
457 int loading; /* load interlock */
460 #define HAMMER_NODE_DELETED 0x0001
461 #define HAMMER_NODE_FLUSH 0x0002
463 typedef struct hammer_node *hammer_node_t;
466 * List of locked nodes.
468 struct hammer_node_locklist {
469 struct hammer_node_locklist *next;
473 typedef struct hammer_node_locklist *hammer_node_locklist_t;
477 * Common I/O management structure - embedded in in-memory structures
478 * which are backed by filesystem buffers.
480 union hammer_io_structure {
482 struct hammer_volume volume;
483 struct hammer_buffer buffer;
486 typedef union hammer_io_structure *hammer_io_structure_t;
489 * Allocation holes are recorded for a short period of time in an attempt
490 * to use up the space.
493 #define HAMMER_MAX_HOLES 8
497 struct hammer_holes {
498 TAILQ_HEAD(, hammer_hole) list;
502 typedef struct hammer_holes *hammer_holes_t;
505 TAILQ_ENTRY(hammer_hole) entry;
510 typedef struct hammer_hole *hammer_hole_t;
512 #include "hammer_cursor.h"
515 * Undo history tracking
517 #define HAMMER_MAX_UNDOS 256
520 RB_ENTRY(hammer_undo) rb_node;
521 TAILQ_ENTRY(hammer_undo) lru_entry;
526 typedef struct hammer_undo *hammer_undo_t;
529 * Internal hammer mount data structure
531 struct hammer_mount {
533 /*struct vnode *rootvp;*/
534 struct hammer_ino_rb_tree rb_inos_root;
535 struct hammer_vol_rb_tree rb_vols_root;
536 struct hammer_nod_rb_tree rb_nods_root;
537 struct hammer_und_rb_tree rb_undo_root;
538 struct hammer_volume *rootvol;
539 struct hammer_base_elm root_btree_beg;
540 struct hammer_base_elm root_btree_end;
541 char *zbuf; /* HAMMER_BUFSIZE bytes worth of all-zeros */
546 int rsv_inodes; /* reserved space due to dirty inodes */
547 int rsv_databufs; /* reserved space due to dirty buffers */
548 int rsv_databytes; /* reserved space due to record data */
549 int rsv_recs; /* reserved space due to dirty records */
550 int flusher_signal; /* flusher thread sequencer */
551 int flusher_act; /* currently active flush group */
552 int flusher_done; /* set to act when complete */
553 int flusher_next; /* next flush group */
554 int flusher_lock; /* lock sequencing of the next flush */
556 hammer_tid_t flusher_tid; /* last flushed transaction id */
557 hammer_off_t flusher_undo_start; /* UNDO window for flushes */
560 u_int check_interrupt;
563 struct hammer_io_list volu_list; /* dirty undo buffers */
564 struct hammer_io_list undo_list; /* dirty undo buffers */
565 struct hammer_io_list data_list; /* dirty data buffers */
566 struct hammer_io_list meta_list; /* dirty meta bufs */
567 struct hammer_io_list lose_list; /* loose buffers */
568 int locked_dirty_count; /* meta/volu count */
569 int io_running_count;
570 int objid_cache_count;
572 hammer_off_t next_tid;
573 int64_t copy_stat_freebigblocks; /* number of free bigblocks */
575 u_int32_t namekey_iterator;
576 hammer_off_t zone_limits[HAMMER_MAX_ZONES];
577 struct netexport export;
578 struct hammer_lock sync_lock;
579 struct hammer_lock free_lock;
580 struct lock blockmap_lock;
581 struct hammer_blockmap blockmap[HAMMER_MAX_ZONES];
582 struct hammer_holes holes[HAMMER_MAX_ZONES];
583 struct hammer_undo undos[HAMMER_MAX_UNDOS];
585 TAILQ_HEAD(, hammer_undo) undo_lru_list;
586 TAILQ_HEAD(, hammer_inode) flush_list;
587 TAILQ_HEAD(, hammer_objid_cache) objid_cache_list;
590 typedef struct hammer_mount *hammer_mount_t;
592 struct hammer_sync_info {
601 extern struct vop_ops hammer_vnode_vops;
602 extern struct vop_ops hammer_spec_vops;
603 extern struct vop_ops hammer_fifo_vops;
604 extern struct bio_ops hammer_bioops;
606 extern int hammer_debug_io;
607 extern int hammer_debug_general;
608 extern int hammer_debug_debug;
609 extern int hammer_debug_inode;
610 extern int hammer_debug_locks;
611 extern int hammer_debug_btree;
612 extern int hammer_debug_tid;
613 extern int hammer_debug_recover;
614 extern int hammer_debug_recover_faults;
615 extern int hammer_count_inodes;
616 extern int hammer_count_records;
617 extern int hammer_count_record_datas;
618 extern int hammer_count_volumes;
619 extern int hammer_count_buffers;
620 extern int hammer_count_nodes;
621 extern int hammer_count_dirtybufs;
622 extern int hammer_limit_dirtybufs;
623 extern int hammer_bio_count;
624 extern int64_t hammer_contention_count;
626 int hammer_vop_inactive(struct vop_inactive_args *);
627 int hammer_vop_reclaim(struct vop_reclaim_args *);
628 int hammer_get_vnode(struct hammer_inode *ip, struct vnode **vpp);
629 struct hammer_inode *hammer_get_inode(hammer_transaction_t trans,
630 struct hammer_node **cache,
631 u_int64_t obj_id, hammer_tid_t asof, int flags,
633 void hammer_put_inode(struct hammer_inode *ip);
634 void hammer_put_inode_ref(struct hammer_inode *ip);
636 int hammer_unload_volume(hammer_volume_t volume, void *data __unused);
637 int hammer_adjust_volume_mode(hammer_volume_t volume, void *data __unused);
639 int hammer_unload_buffer(hammer_buffer_t buffer, void *data __unused);
640 int hammer_install_volume(hammer_mount_t hmp, const char *volname);
642 int hammer_ip_lookup(hammer_cursor_t cursor);
643 int hammer_ip_first(hammer_cursor_t cursor);
644 int hammer_ip_next(hammer_cursor_t cursor);
645 int hammer_ip_resolve_data(hammer_cursor_t cursor);
646 int hammer_ip_delete_record(hammer_cursor_t cursor, hammer_inode_t ip,
648 int hammer_delete_at_cursor(hammer_cursor_t cursor, int64_t *stat_bytes);
649 int hammer_ip_check_directory_empty(hammer_transaction_t trans,
651 int hammer_sync_hmp(hammer_mount_t hmp, int waitfor);
652 int hammer_queue_inodes_flusher(hammer_mount_t hmp, int waitfor);
656 hammer_alloc_mem_record(hammer_inode_t ip, int data_len);
657 void hammer_flush_record_done(hammer_record_t record, int error);
658 void hammer_wait_mem_record(hammer_record_t record);
659 void hammer_rel_mem_record(hammer_record_t record);
661 int hammer_cursor_up(hammer_cursor_t cursor);
662 int hammer_cursor_up_locked(hammer_cursor_t cursor);
663 int hammer_cursor_down(hammer_cursor_t cursor);
664 int hammer_cursor_upgrade(hammer_cursor_t cursor);
665 void hammer_cursor_downgrade(hammer_cursor_t cursor);
666 int hammer_cursor_seek(hammer_cursor_t cursor, hammer_node_t node,
668 void hammer_lock_ex(struct hammer_lock *lock);
669 int hammer_lock_ex_try(struct hammer_lock *lock);
670 void hammer_lock_sh(struct hammer_lock *lock);
671 int hammer_lock_upgrade(struct hammer_lock *lock);
672 void hammer_lock_downgrade(struct hammer_lock *lock);
673 void hammer_unlock(struct hammer_lock *lock);
674 void hammer_ref(struct hammer_lock *lock);
675 void hammer_unref(struct hammer_lock *lock);
677 void hammer_sync_lock_ex(hammer_transaction_t trans);
678 void hammer_sync_lock_sh(hammer_transaction_t trans);
679 void hammer_sync_unlock(hammer_transaction_t trans);
681 u_int32_t hammer_to_unix_xid(uuid_t *uuid);
682 void hammer_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
683 void hammer_to_timespec(hammer_tid_t tid, struct timespec *ts);
684 hammer_tid_t hammer_timespec_to_transid(struct timespec *ts);
685 hammer_tid_t hammer_now_tid(void);
686 hammer_tid_t hammer_str_to_tid(const char *str);
687 hammer_tid_t hammer_alloc_objid(hammer_transaction_t trans, hammer_inode_t dip);
688 void hammer_clear_objid(hammer_inode_t dip);
689 void hammer_destroy_objid_cache(hammer_mount_t hmp);
691 int hammer_enter_undo_history(hammer_mount_t hmp, hammer_off_t offset,
693 void hammer_clear_undo_history(hammer_mount_t hmp);
694 enum vtype hammer_get_vnode_type(u_int8_t obj_type);
695 int hammer_get_dtype(u_int8_t obj_type);
696 u_int8_t hammer_get_obj_type(enum vtype vtype);
697 int64_t hammer_directory_namekey(void *name, int len);
698 int hammer_nohistory(hammer_inode_t ip);
700 int hammer_init_cursor(hammer_transaction_t trans, hammer_cursor_t cursor,
701 struct hammer_node **cache, hammer_inode_t ip);
702 int hammer_reinit_cursor(hammer_cursor_t cursor);
703 void hammer_normalize_cursor(hammer_cursor_t cursor);
704 void hammer_done_cursor(hammer_cursor_t cursor);
705 void hammer_mem_done(hammer_cursor_t cursor);
707 int hammer_btree_lookup(hammer_cursor_t cursor);
708 int hammer_btree_first(hammer_cursor_t cursor);
709 int hammer_btree_last(hammer_cursor_t cursor);
710 int hammer_btree_extract(hammer_cursor_t cursor, int flags);
711 int hammer_btree_iterate(hammer_cursor_t cursor);
712 int hammer_btree_iterate_reverse(hammer_cursor_t cursor);
713 int hammer_btree_insert(hammer_cursor_t cursor,
714 hammer_btree_leaf_elm_t elm);
715 int hammer_btree_delete(hammer_cursor_t cursor);
716 int hammer_btree_cmp(hammer_base_elm_t key1, hammer_base_elm_t key2);
717 int hammer_btree_chkts(hammer_tid_t ts, hammer_base_elm_t key);
718 int hammer_btree_correct_rhb(hammer_cursor_t cursor, hammer_tid_t tid);
719 int hammer_btree_correct_lhb(hammer_cursor_t cursor, hammer_tid_t tid);
721 int btree_set_parent(hammer_transaction_t trans, hammer_node_t node,
722 hammer_btree_elm_t elm);
723 int hammer_btree_lock_children(hammer_cursor_t cursor,
724 struct hammer_node_locklist **locklistp);
725 void hammer_btree_unlock_children(struct hammer_node_locklist **locklistp);
728 void hammer_print_btree_node(hammer_node_ondisk_t ondisk);
729 void hammer_print_btree_elm(hammer_btree_elm_t elm, u_int8_t type, int i);
731 void *hammer_bread(struct hammer_mount *hmp, hammer_off_t off,
732 int *errorp, struct hammer_buffer **bufferp);
733 void *hammer_bnew(struct hammer_mount *hmp, hammer_off_t off,
734 int *errorp, struct hammer_buffer **bufferp);
736 hammer_volume_t hammer_get_root_volume(hammer_mount_t hmp, int *errorp);
737 int hammer_dowrite(hammer_cursor_t cursor, hammer_inode_t ip,
740 hammer_volume_t hammer_get_volume(hammer_mount_t hmp,
741 int32_t vol_no, int *errorp);
742 hammer_buffer_t hammer_get_buffer(hammer_mount_t hmp,
743 hammer_off_t buf_offset, int isnew, int *errorp);
744 void hammer_clrxlate_buffer(hammer_mount_t hmp,
745 hammer_off_t buf_offset);
746 void hammer_uncache_buffer(struct hammer_mount *hmp, hammer_off_t off);
748 int hammer_ref_volume(hammer_volume_t volume);
749 int hammer_ref_buffer(hammer_buffer_t buffer);
750 void hammer_flush_buffer_nodes(hammer_buffer_t buffer);
752 void hammer_rel_volume(hammer_volume_t volume, int flush);
753 void hammer_rel_buffer(hammer_buffer_t buffer, int flush);
755 int hammer_vfs_export(struct mount *mp, int op,
756 const struct export_args *export);
757 hammer_node_t hammer_get_node(hammer_mount_t hmp, hammer_off_t node_offset,
758 int isnew, int *errorp);
759 void hammer_ref_node(hammer_node_t node);
760 hammer_node_t hammer_ref_node_safe(struct hammer_mount *hmp,
761 struct hammer_node **cache, int *errorp);
762 void hammer_rel_node(hammer_node_t node);
763 void hammer_delete_node(hammer_transaction_t trans,
765 void hammer_cache_node(hammer_node_t node,
766 struct hammer_node **cache);
767 void hammer_uncache_node(struct hammer_node **cache);
768 void hammer_flush_node(hammer_node_t node);
770 void hammer_dup_buffer(struct hammer_buffer **bufferp,
771 struct hammer_buffer *buffer);
772 hammer_node_t hammer_alloc_btree(hammer_transaction_t trans, int *errorp);
773 void *hammer_alloc_record(hammer_transaction_t trans,
774 hammer_off_t *rec_offp, u_int16_t rec_type,
775 struct hammer_buffer **rec_bufferp,
776 int32_t data_len, void **datap,
777 hammer_off_t *data_offp,
778 struct hammer_buffer **data_bufferp, int *errorp);
779 void *hammer_alloc_data(hammer_transaction_t trans, int32_t data_len,
780 hammer_off_t *data_offsetp,
781 struct hammer_buffer **data_bufferp, int *errorp);
783 int hammer_generate_undo(hammer_transaction_t trans, hammer_io_t io,
784 hammer_off_t zone1_offset, void *base, int len);
786 void hammer_put_volume(struct hammer_volume *volume, int flush);
787 void hammer_put_buffer(struct hammer_buffer *buffer, int flush);
789 hammer_off_t hammer_freemap_alloc(hammer_transaction_t trans,
790 hammer_off_t owner, int *errorp);
791 void hammer_freemap_free(hammer_transaction_t trans, hammer_off_t phys_offset,
792 hammer_off_t owner, int *errorp);
793 int hammer_checkspace(hammer_mount_t hmp);
794 hammer_off_t hammer_blockmap_alloc(hammer_transaction_t trans, int zone,
795 int bytes, int *errorp);
796 void hammer_blockmap_free(hammer_transaction_t trans,
797 hammer_off_t bmap_off, int bytes);
798 int hammer_blockmap_getfree(hammer_mount_t hmp, hammer_off_t bmap_off,
799 int *curp, int *errorp);
800 hammer_off_t hammer_blockmap_lookup(hammer_mount_t hmp, hammer_off_t bmap_off,
802 hammer_off_t hammer_undo_lookup(hammer_mount_t hmp, hammer_off_t bmap_off,
804 int64_t hammer_undo_used(hammer_mount_t hmp);
805 int64_t hammer_undo_space(hammer_mount_t hmp);
806 int64_t hammer_undo_max(hammer_mount_t hmp);
809 void hammer_start_transaction(struct hammer_transaction *trans,
810 struct hammer_mount *hmp);
811 void hammer_simple_transaction(struct hammer_transaction *trans,
812 struct hammer_mount *hmp);
813 void hammer_start_transaction_fls(struct hammer_transaction *trans,
814 struct hammer_mount *hmp);
815 void hammer_done_transaction(struct hammer_transaction *trans);
817 void hammer_modify_inode(struct hammer_transaction *trans,
818 hammer_inode_t ip, int flags);
819 void hammer_flush_inode(hammer_inode_t ip, int flags);
820 void hammer_flush_inode_done(hammer_inode_t ip);
821 void hammer_wait_inode(hammer_inode_t ip);
823 int hammer_create_inode(struct hammer_transaction *trans, struct vattr *vap,
824 struct ucred *cred, struct hammer_inode *dip,
825 struct hammer_inode **ipp);
826 void hammer_rel_inode(hammer_inode_t ip, int flush);
827 int hammer_reload_inode(hammer_inode_t ip, void *arg __unused);
829 int hammer_sync_inode(hammer_inode_t ip);
830 void hammer_test_inode(hammer_inode_t ip);
831 void hammer_inode_unloadable_check(hammer_inode_t ip, int getvp);
833 int hammer_ip_add_directory(struct hammer_transaction *trans,
834 hammer_inode_t dip, struct namecache *ncp,
836 int hammer_ip_del_directory(struct hammer_transaction *trans,
837 hammer_cursor_t cursor, hammer_inode_t dip,
839 int hammer_ip_add_record(struct hammer_transaction *trans,
840 hammer_record_t record);
841 int hammer_ip_delete_range(hammer_cursor_t cursor, hammer_inode_t ip,
842 int64_t ran_beg, int64_t ran_end);
843 int hammer_ip_delete_range_all(hammer_cursor_t cursor, hammer_inode_t ip,
845 int hammer_ip_sync_data(hammer_cursor_t cursor, hammer_inode_t ip,
846 int64_t offset, void *data, int bytes);
847 int hammer_ip_sync_record(hammer_transaction_t trans, hammer_record_t rec);
848 int hammer_ip_sync_record_cursor(hammer_cursor_t cursor, hammer_record_t rec);
850 int hammer_ioctl(hammer_inode_t ip, u_long com, caddr_t data, int fflag,
853 void hammer_io_init(hammer_io_t io, hammer_mount_t hmp,
854 enum hammer_io_type type);
855 void hammer_io_reinit(hammer_io_t io, enum hammer_io_type type);
856 int hammer_io_read(struct vnode *devvp, struct hammer_io *io,
858 int hammer_io_new(struct vnode *devvp, struct hammer_io *io);
859 void hammer_io_release(struct hammer_io *io, int flush);
860 void hammer_io_flush(struct hammer_io *io);
861 void hammer_io_clear_modify(struct hammer_io *io);
862 void hammer_io_waitdep(struct hammer_io *io);
864 void hammer_modify_volume(hammer_transaction_t trans, hammer_volume_t volume,
865 void *base, int len);
866 void hammer_modify_buffer(hammer_transaction_t trans, hammer_buffer_t buffer,
867 void *base, int len);
868 void hammer_modify_volume_done(hammer_volume_t volume);
869 void hammer_modify_buffer_done(hammer_buffer_t buffer);
871 int hammer_ioc_reblock(hammer_transaction_t trans, hammer_inode_t ip,
872 struct hammer_ioc_reblock *reblock);
873 int hammer_ioc_prune(hammer_transaction_t trans, hammer_inode_t ip,
874 struct hammer_ioc_prune *prune);
876 void hammer_init_holes(hammer_mount_t hmp, hammer_holes_t holes);
877 void hammer_free_holes(hammer_mount_t hmp, hammer_holes_t holes);
878 int hammer_signal_check(hammer_mount_t hmp);
880 void hammer_flusher_create(hammer_mount_t hmp);
881 void hammer_flusher_destroy(hammer_mount_t hmp);
882 void hammer_flusher_sync(hammer_mount_t hmp);
883 void hammer_flusher_async(hammer_mount_t hmp);
885 int hammer_recover(hammer_mount_t hmp, hammer_volume_t rootvol);
886 void hammer_recover_flush_buffers(hammer_mount_t hmp,
887 hammer_volume_t root_volume);
889 void hammer_crc_set_blockmap(hammer_blockmap_t blockmap);
890 void hammer_crc_set_volume(hammer_volume_ondisk_t ondisk);
892 int hammer_crc_test_blockmap(hammer_blockmap_t blockmap);
893 int hammer_crc_test_volume(hammer_volume_ondisk_t ondisk);
894 int hammer_crc_test_btree(hammer_node_ondisk_t ondisk);
895 void hkprintf(const char *ctl, ...);
900 hammer_modify_node_noundo(hammer_transaction_t trans, hammer_node_t node)
902 hammer_modify_buffer(trans, node->buffer, NULL, 0);
906 hammer_modify_node_all(hammer_transaction_t trans, struct hammer_node *node)
908 hammer_modify_buffer(trans, node->buffer,
909 node->ondisk, sizeof(*node->ondisk));
913 hammer_modify_node(hammer_transaction_t trans, hammer_node_t node,
916 hammer_crc_t *crcptr;
918 KKASSERT((char *)base >= (char *)node->ondisk &&
919 (char *)base + len <=
920 (char *)node->ondisk + sizeof(*node->ondisk));
921 hammer_modify_buffer(trans, node->buffer, base, len);
922 crcptr = &node->ondisk->crc;
923 hammer_modify_buffer(trans, node->buffer, crcptr, sizeof(hammer_crc_t));
924 --node->buffer->io.modify_refs; /* only want one ref */
928 hammer_modify_node_done(hammer_node_t node)
930 node->ondisk->crc = crc32(&node->ondisk->crc + 1, HAMMER_BTREE_CRCSIZE);
931 hammer_modify_buffer_done(node->buffer);
934 #define hammer_modify_volume_field(trans, vol, field) \
935 hammer_modify_volume(trans, vol, &(vol)->ondisk->field, \
936 sizeof((vol)->ondisk->field))
938 #define hammer_modify_node_field(trans, node, field) \
939 hammer_modify_node(trans, node, &(node)->ondisk->field, \
940 sizeof((node)->ondisk->field))