sys/vfs/hammer/hammer.h

   1 /*
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/vfs/hammer/hammer.h,v 1.37 2008/02/10 18:58:22 dillon Exp $
  35  */
  36 /*
  37  * This header file contains structures used internally by the HAMMERFS
  38  * implementation.  See hammer_disk.h for on-disk structures.
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/types.h>
  43 #include <sys/kernel.h>
  44 #include <sys/conf.h>
  45 #include <sys/systm.h>
  46 #include <sys/tree.h>
  47 #include <sys/malloc.h>
  48 #include <sys/mount.h>
  49 #include <sys/mountctl.h>
  50 #include <sys/vnode.h>
  51 #include <sys/proc.h>
  52 #include <sys/globaldata.h>
  53 #include <sys/lockf.h>
  54 #include <sys/buf.h>
  55 #include <sys/queue.h>
  56 #include <sys/globaldata.h>
  57
  58 #include <sys/buf2.h>
  59 #include "hammer_disk.h"
  60 #include "hammer_mount.h"
  61 #include "hammer_ioctl.h"
  62
  63 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  64
  65 MALLOC_DECLARE(M_HAMMER);
  66
  67 struct hammer_mount;
  68
  69 /*
  70  * Key structure used for custom RB tree inode lookups.  This prototypes
  71  * the function hammer_ino_rb_tree_RB_LOOKUP_INFO(root, info).
  72  */
  73 typedef struct hammer_inode_info {
  74         int64_t         obj_id;         /* (key) object identifier */
  75         hammer_tid_t    obj_asof;       /* (key) snapshot transid or 0 */
  76 } *hammer_inode_info_t;
  77
  78 /*
  79  * HAMMER Transaction tracking
  80  */
  81 struct hammer_transaction {
  82         struct hammer_mount *hmp;
  83         hammer_tid_t    tid;
  84         struct hammer_volume *rootvol;
  85 /*      TAILQ_HEAD(, hammer_io) recycle_list;*/
  86 };
  87
  88 typedef struct hammer_transaction *hammer_transaction_t;
  89
  90 /*
  91  * HAMMER locks
  92  */
  93 struct hammer_lock {
  94         int     refs;           /* active references delay writes */
  95         int     lockcount;      /* lock count for exclusive/shared access */
  96         int     wanted;
  97         struct thread *locktd;
  98 };
  99
 100 static __inline int
 101 hammer_islocked(struct hammer_lock *lock)
 102 {
 103         return(lock->lockcount != 0);
 104 }
 105
 106 static __inline int
 107 hammer_isactive(struct hammer_lock *lock)
 108 {
 109         return(lock->refs != 0);
 110 }
 111
 112 static __inline int
 113 hammer_islastref(struct hammer_lock *lock)
 114 {
 115         return(lock->refs == 1);
 116 }
 117
 118 /*
 119  * This inline is specifically optimized for the case where the caller
 120  * owns the lock, but wants to know what kind of lock he owns.  A
 121  * negative value indicates a shared lock, a positive value indicates
 122  * an exclusive lock.
 123  */
 124 static __inline int
 125 hammer_lock_held(struct hammer_lock *lock)
 126 {
 127         return(lock->lockcount);
 128 }
 129
 130 /*
 131  * Structure used to represent an inode in-memory.
 132  *
 133  * The record and data associated with an inode may be out of sync with
 134  * the disk (xDIRTY flags), or not even on the disk at all (ONDISK flag
 135  * clear).
 136  *
 137  * An inode may also hold a cache of unsynchronized records, used for
 138  * database and directories only.  Unsynchronized regular file data is
 139  * stored in the buffer cache.
 140  *
 141  * NOTE: A file which is created and destroyed within the initial
 142  * synchronization period can wind up not doing any disk I/O at all.
 143  *
 144  * Finally, an inode may cache numerous disk-referencing B-Tree cursors.
 145  */
 146 struct hammer_ino_rb_tree;
 147 struct hammer_inode;
 148 RB_HEAD(hammer_ino_rb_tree, hammer_inode);
 149 RB_PROTOTYPEX(hammer_ino_rb_tree, INFO, hammer_inode, rb_node,
 150               hammer_ino_rb_compare, hammer_inode_info_t);
 151
 152 struct hammer_rec_rb_tree;
 153 struct hammer_record;
 154 RB_HEAD(hammer_rec_rb_tree, hammer_record);
 155 RB_PROTOTYPEX(hammer_rec_rb_tree, INFO, hammer_record, rb_node,
 156               hammer_rec_rb_compare, hammer_base_elm_t);
 157
 158 TAILQ_HEAD(hammer_node_list, hammer_node);
 159
 160 struct hammer_inode {
 161         RB_ENTRY(hammer_inode) rb_node;
 162         u_int64_t       obj_id;         /* (key) object identifier */
 163         hammer_tid_t    obj_asof;       /* (key) snapshot transid or 0 */
 164         hammer_tid_t    last_tid;       /* last modified tid (for fsync) */
 165         struct hammer_mount *hmp;
 166         int             flags;
 167         struct vnode    *vp;
 168         struct lockf    advlock;
 169         struct hammer_lock lock;
 170         struct hammer_inode_record ino_rec;
 171         struct hammer_inode_data ino_data;
 172         struct hammer_rec_rb_tree rec_tree;     /* red-black record tree */
 173         struct hammer_node      *cache[2];      /* search initiate cache */
 174 };
 175
 176 typedef struct hammer_inode *hammer_inode_t;
 177
 178 #define VTOI(vp)        ((struct hammer_inode *)(vp)->v_data)
 179
 180 #define HAMMER_INODE_DDIRTY     0x0001  /* in-memory ino_data is dirty */
 181 #define HAMMER_INODE_RDIRTY     0x0002  /* in-memory ino_rec is dirty */
 182 #define HAMMER_INODE_ITIMES     0x0004  /* in-memory mtime/atime modified */
 183 #define HAMMER_INODE_XDIRTY     0x0008  /* in-memory records present */
 184 #define HAMMER_INODE_ONDISK     0x0010  /* inode is on-disk (else not yet) */
 185 #define HAMMER_INODE_FLUSH      0x0020  /* flush on last ref */
 186 #define HAMMER_INODE_DELETED    0x0080  /* inode ready for deletion */
 187 #define HAMMER_INODE_DELONDISK  0x0100  /* delete synchronized to disk */
 188 #define HAMMER_INODE_RO         0x0200  /* read-only (because of as-of) */
 189 #define HAMMER_INODE_GONE       0x0400  /* delete flushed out */
 190 #define HAMMER_INODE_DONDISK    0x0800  /* data records may be on disk */
 191 #define HAMMER_INODE_BUFS       0x1000  /* dirty high level bps present */
 192 #define HAMMER_INODE_TIDLOCKED  0x2000  /* tid locked until inode synced */
 193
 194 #define HAMMER_INODE_MODMASK    (HAMMER_INODE_DDIRTY|HAMMER_INODE_RDIRTY| \
 195                                  HAMMER_INODE_XDIRTY|HAMMER_INODE_BUFS|   \
 196                                  HAMMER_INODE_ITIMES|HAMMER_INODE_DELETED)
 197
 198 #define HAMMER_MAX_INODE_CURSORS        4
 199
 200 /*
 201  * Structure used to represent an unsynchronized record in-memory.  This
 202  * structure is orgranized in a per-inode RB-tree.  If the inode is not
 203  * on disk then neither are any records and the in-memory record tree
 204  * represents the entire contents of the inode.  If the inode is on disk
 205  * then the on-disk B-Tree is scanned in parallel with the in-memory
 206  * RB-Tree to synthesize the current state of the file.
 207  *
 208  * Only current (delete_tid == 0) unsynchronized records are kept in-memory.
 209  *
 210  * blocked is the count of the number of cursors (ip_first/ip_next) blocked
 211  * on the record waiting for a synchronization to complete.
 212  */
 213 struct hammer_record {
 214         RB_ENTRY(hammer_record)         rb_node;
 215         struct hammer_lock              lock;
 216         struct hammer_inode             *ip;
 217         union hammer_record_ondisk      rec;
 218         union hammer_data_ondisk        *data;
 219         int                             flags;
 220         int                             blocked;
 221 };
 222
 223 typedef struct hammer_record *hammer_record_t;
 224
 225 #define HAMMER_RECF_ALLOCDATA           0x0001
 226 #define HAMMER_RECF_ONRBTREE            0x0002
 227 #define HAMMER_RECF_DELETED             0x0004
 228 #define HAMMER_RECF_INBAND              0x0008
 229 #define HAMMER_RECF_SYNCING             0x0010
 230 #define HAMMER_RECF_WANTED              0x0020
 231
 232 /*
 233  * In-memory structures representing on-disk structures.
 234  */
 235 struct hammer_volume;
 236 struct hammer_buffer;
 237 struct hammer_node;
 238 RB_HEAD(hammer_vol_rb_tree, hammer_volume);
 239 RB_HEAD(hammer_buf_rb_tree, hammer_buffer);
 240 RB_HEAD(hammer_nod_rb_tree, hammer_node);
 241
 242 RB_PROTOTYPE2(hammer_vol_rb_tree, hammer_volume, rb_node,
 243               hammer_vol_rb_compare, int32_t);
 244 RB_PROTOTYPE2(hammer_buf_rb_tree, hammer_buffer, rb_node,
 245               hammer_buf_rb_compare, hammer_off_t);
 246 RB_PROTOTYPE2(hammer_nod_rb_tree, hammer_node, rb_node,
 247               hammer_nod_rb_compare, hammer_off_t);
 248
 249 /*
 250  * IO management - embedded at the head of various in-memory structures
 251  */
 252 enum hammer_io_type { HAMMER_STRUCTURE_VOLUME,
 253                       HAMMER_STRUCTURE_BUFFER };
 254
 255 union hammer_io_structure;
 256 struct hammer_io;
 257
 258 struct worklist {
 259         LIST_ENTRY(worklist) node;
 260 };
 261
 262 TAILQ_HEAD(hammer_io_list, hammer_io);
 263
 264 struct hammer_io {
 265         struct worklist worklist;
 266         struct hammer_lock lock;
 267         enum hammer_io_type type;
 268         struct buf      *bp;
 269         int64_t         offset;
 270         TAILQ_ENTRY(hammer_io) entry;   /* based on modified flag */
 271         struct hammer_io_list  *entry_list;
 272         struct hammer_io_list  deplist;
 273         u_int           modified : 1;   /* bp's data was modified */
 274         u_int           released : 1;   /* bp released (w/ B_LOCKED set) */
 275         u_int           running : 1;    /* bp write IO in progress */
 276         u_int           waiting : 1;    /* someone is waiting on us */
 277         u_int           loading : 1;    /* ondisk is loading */
 278         u_int           validated : 1;  /* ondisk has been validated */
 279 };
 280
 281 typedef struct hammer_io *hammer_io_t;
 282
 283 /*
 284  * In-memory volume representing on-disk buffer
 285  */
 286 struct hammer_volume {
 287         struct hammer_io io;
 288         RB_ENTRY(hammer_volume) rb_node;
 289         struct hammer_buf_rb_tree rb_bufs_root;
 290         struct hammer_volume_ondisk *ondisk;
 291         int32_t vol_no;
 292         int64_t nblocks;        /* note: special calculation for statfs */
 293         int64_t buffer_base;    /* base offset of buffer 0 */
 294         hammer_off_t maxbuf_off; /* Maximum buffer offset */
 295         char    *vol_name;
 296         struct vnode *devvp;
 297         struct hammer_mount *hmp;
 298         int     vol_flags;
 299 };
 300
 301 typedef struct hammer_volume *hammer_volume_t;
 302
 303 /*
 304  * In-memory buffer (other then volume, super-cluster, or cluster),
 305  * representing an on-disk buffer.
 306  */
 307 struct hammer_buffer {
 308         struct hammer_io io;
 309         RB_ENTRY(hammer_buffer) rb_node;
 310         void *ondisk;
 311         struct hammer_volume *volume;
 312         hammer_off_t zone2_offset;
 313         hammer_off_t zoneX_offset;
 314         struct hammer_node_list clist;
 315 };
 316
 317 typedef struct hammer_buffer *hammer_buffer_t;
 318
 319 /*
 320  * In-memory B-Tree node, representing an on-disk B-Tree node.
 321  *
 322  * This is a hang-on structure which is backed by a hammer_buffer,
 323  * indexed by a hammer_cluster, and used for fine-grained locking of
 324  * B-Tree nodes in order to properly control lock ordering.  A hammer_buffer
 325  * can contain multiple nodes representing wildly disassociated portions
 326  * of the B-Tree so locking cannot be done on a buffer-by-buffer basis.
 327  *
 328  * This structure uses a cluster-relative index to reduce the number
 329  * of layers required to access it, and also because all on-disk B-Tree
 330  * references are cluster-relative offsets.
 331  */
 332 struct hammer_node {
 333         struct hammer_lock      lock;           /* node-by-node lock */
 334         TAILQ_ENTRY(hammer_node) entry;         /* per-buffer linkage */
 335         RB_ENTRY(hammer_node)   rb_node;        /* per-cluster linkage */
 336         hammer_off_t            node_offset;    /* full offset spec */
 337         struct hammer_mount     *hmp;
 338         struct hammer_buffer    *buffer;        /* backing buffer */
 339         hammer_node_ondisk_t    ondisk;         /* ptr to on-disk structure */
 340         struct hammer_node      **cache1;       /* passive cache(s) */
 341         struct hammer_node      **cache2;
 342         int                     flags;
 343 };
 344
 345 #define HAMMER_NODE_DELETED     0x0001
 346 #define HAMMER_NODE_FLUSH       0x0002
 347
 348 typedef struct hammer_node      *hammer_node_t;
 349
 350 /*
 351  * List of locked nodes.
 352  */
 353 struct hammer_node_locklist {
 354         struct hammer_node_locklist *next;
 355         hammer_node_t   node;
 356 };
 357
 358 typedef struct hammer_node_locklist *hammer_node_locklist_t;
 359
 360
 361 /*
 362  * Common I/O management structure - embedded in in-memory structures
 363  * which are backed by filesystem buffers.
 364  */
 365 union hammer_io_structure {
 366         struct hammer_io        io;
 367         struct hammer_volume    volume;
 368         struct hammer_buffer    buffer;
 369 };
 370
 371 typedef union hammer_io_structure *hammer_io_structure_t;
 372
 373 #define HAMFS_CLUSTER_DIRTY     0x0001
 374
 375 #include "hammer_cursor.h"
 376
 377 /*
 378  * Internal hammer mount data structure
 379  */
 380 struct hammer_mount {
 381         struct mount *mp;
 382         /*struct vnode *rootvp;*/
 383         struct hammer_ino_rb_tree rb_inos_root;
 384         struct hammer_vol_rb_tree rb_vols_root;
 385         struct hammer_nod_rb_tree rb_nods_root;
 386         struct hammer_volume *rootvol;
 387         struct hammer_base_elm root_btree_beg;
 388         struct hammer_base_elm root_btree_end;
 389         char    *zbuf;  /* HAMMER_BUFSIZE bytes worth of all-zeros */
 390         int     hflags;
 391         int     ronly;
 392         int     nvolumes;
 393         int     volume_iterator;
 394         uuid_t  fsid;
 395         udev_t  fsid_udev;
 396         hammer_tid_t asof;
 397         u_int32_t namekey_iterator;
 398         struct netexport export;
 399         struct lock blockmap_lock;
 400 };
 401
 402 typedef struct hammer_mount     *hammer_mount_t;
 403
 404 struct hammer_sync_info {
 405         int error;
 406         int waitfor;
 407 };
 408
 409 #endif
 410
 411 #if defined(_KERNEL)
 412
 413 extern struct vop_ops hammer_vnode_vops;
 414 extern struct vop_ops hammer_spec_vops;
 415 extern struct vop_ops hammer_fifo_vops;
 416 extern struct bio_ops hammer_bioops;
 417
 418 extern int hammer_debug_general;
 419 extern int hammer_debug_btree;
 420 extern int hammer_debug_tid;
 421 extern int hammer_debug_recover;
 422 extern int hammer_debug_recover_faults;
 423 extern int hammer_count_inodes;
 424 extern int hammer_count_records;
 425 extern int hammer_count_record_datas;
 426 extern int hammer_count_volumes;
 427 extern int hammer_count_buffers;
 428 extern int hammer_count_nodes;
 429
 430 int     hammer_vop_inactive(struct vop_inactive_args *);
 431 int     hammer_vop_reclaim(struct vop_reclaim_args *);
 432 int     hammer_get_vnode(struct hammer_inode *ip, int lktype,
 433                         struct vnode **vpp);
 434 struct hammer_inode *hammer_get_inode(hammer_mount_t hmp,
 435                         struct hammer_node **cache,
 436                         u_int64_t obj_id, hammer_tid_t asof, int flags,
 437                         int *errorp);
 438 void    hammer_put_inode(struct hammer_inode *ip);
 439 void    hammer_put_inode_ref(struct hammer_inode *ip);
 440
 441 int     hammer_unload_inode(hammer_inode_t ip, void *data);
 442 int     hammer_unload_volume(hammer_volume_t volume, void *data __unused);
 443 int     hammer_unload_buffer(hammer_buffer_t buffer, void *data __unused);
 444 int     hammer_install_volume(hammer_mount_t hmp, const char *volname);
 445
 446 int     hammer_ip_lookup(hammer_cursor_t cursor, hammer_inode_t ip);
 447 int     hammer_ip_first(hammer_cursor_t cursor, hammer_inode_t ip);
 448 int     hammer_ip_next(hammer_cursor_t cursor);
 449 int     hammer_ip_resolve_record_and_data(hammer_cursor_t cursor);
 450 int     hammer_ip_resolve_data(hammer_cursor_t cursor);
 451 int     hammer_ip_delete_record(hammer_cursor_t cursor, hammer_tid_t tid);
 452 int     hammer_delete_at_cursor(hammer_cursor_t cursor, int64_t *stat_bytes);
 453 int     hammer_ip_check_directory_empty(hammer_transaction_t trans,
 454                         hammer_inode_t ip);
 455 int     hammer_sync_hmp(hammer_mount_t hmp, int waitfor);
 456 int     hammer_sync_volume(hammer_volume_t volume, void *data);
 457 int     hammer_sync_buffer(hammer_buffer_t buffer, void *data);
 458
 459 hammer_record_t
 460         hammer_alloc_mem_record(hammer_inode_t ip);
 461 void    hammer_rel_mem_record(hammer_record_t record);
 462
 463 int     hammer_cursor_up(hammer_cursor_t cursor);
 464 int     hammer_cursor_down(hammer_cursor_t cursor);
 465 int     hammer_cursor_upgrade(hammer_cursor_t cursor);
 466 void    hammer_cursor_downgrade(hammer_cursor_t cursor);
 467 int     hammer_cursor_seek(hammer_cursor_t cursor, hammer_node_t node,
 468                         int index);
 469 void    hammer_lock_ex(struct hammer_lock *lock);
 470 int     hammer_lock_ex_try(struct hammer_lock *lock);
 471 void    hammer_lock_sh(struct hammer_lock *lock);
 472 int     hammer_lock_upgrade(struct hammer_lock *lock);
 473 void    hammer_lock_downgrade(struct hammer_lock *lock);
 474 void    hammer_unlock(struct hammer_lock *lock);
 475 void    hammer_ref(struct hammer_lock *lock);
 476 void    hammer_unref(struct hammer_lock *lock);
 477
 478 u_int32_t hammer_to_unix_xid(uuid_t *uuid);
 479 void hammer_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
 480 void    hammer_to_timespec(hammer_tid_t tid, struct timespec *ts);
 481 hammer_tid_t hammer_timespec_to_transid(struct timespec *ts);
 482 hammer_tid_t hammer_alloc_tid(hammer_transaction_t trans);
 483 hammer_tid_t hammer_now_tid(void);
 484 hammer_tid_t hammer_str_to_tid(const char *str);
 485
 486 enum vtype hammer_get_vnode_type(u_int8_t obj_type);
 487 int hammer_get_dtype(u_int8_t obj_type);
 488 u_int8_t hammer_get_obj_type(enum vtype vtype);
 489 int64_t hammer_directory_namekey(void *name, int len);
 490
 491 int     hammer_init_cursor_hmp(hammer_cursor_t cursor,
 492                         struct hammer_node **cache, hammer_mount_t hmp);
 493
 494 void    hammer_done_cursor(hammer_cursor_t cursor);
 495 void    hammer_mem_done(hammer_cursor_t cursor);
 496
 497 int     hammer_btree_lookup(hammer_cursor_t cursor);
 498 int     hammer_btree_first(hammer_cursor_t cursor);
 499 int     hammer_btree_last(hammer_cursor_t cursor);
 500 int     hammer_btree_extract(hammer_cursor_t cursor, int flags);
 501 int     hammer_btree_iterate(hammer_cursor_t cursor);
 502 int     hammer_btree_iterate_reverse(hammer_cursor_t cursor);
 503 int     hammer_btree_insert(hammer_cursor_t cursor, hammer_btree_elm_t elm);
 504 int     hammer_btree_delete(hammer_cursor_t cursor);
 505 int     hammer_btree_cmp(hammer_base_elm_t key1, hammer_base_elm_t key2);
 506 int     hammer_btree_chkts(hammer_tid_t ts, hammer_base_elm_t key);
 507 int     hammer_btree_correct_rhb(hammer_cursor_t cursor, hammer_tid_t tid);
 508 int     hammer_btree_correct_lhb(hammer_cursor_t cursor, hammer_tid_t tid);
 509
 510
 511 int     hammer_btree_lock_children(hammer_cursor_t cursor,
 512                         struct hammer_node_locklist **locklistp);
 513 void    hammer_btree_unlock_children(struct hammer_node_locklist **locklistp);
 514
 515 void    hammer_print_btree_node(hammer_node_ondisk_t ondisk);
 516 void    hammer_print_btree_elm(hammer_btree_elm_t elm, u_int8_t type, int i);
 517
 518 void    *hammer_bread(struct hammer_mount *hmp, hammer_off_t off,
 519                         int *errorp, struct hammer_buffer **bufferp);
 520 void    *hammer_bnew(struct hammer_mount *hmp, hammer_off_t off,
 521                         int *errorp, struct hammer_buffer **bufferp);
 522
 523 hammer_volume_t hammer_get_root_volume(hammer_mount_t hmp, int *errorp);
 524
 525 hammer_volume_t hammer_get_volume(hammer_mount_t hmp,
 526                         int32_t vol_no, int *errorp);
 527 hammer_buffer_t hammer_get_buffer(hammer_mount_t hmp,
 528                         hammer_off_t buf_offset, int isnew, int *errorp);
 529
 530 int             hammer_ref_volume(hammer_volume_t volume);
 531 int             hammer_ref_buffer(hammer_buffer_t buffer);
 532 void            hammer_flush_buffer_nodes(hammer_buffer_t buffer);
 533
 534 void            hammer_rel_volume(hammer_volume_t volume, int flush);
 535 void            hammer_rel_buffer(hammer_buffer_t buffer, int flush);
 536
 537 int             hammer_vfs_export(struct mount *mp, int op,
 538                         const struct export_args *export);
 539 hammer_node_t   hammer_get_node(hammer_mount_t hmp,
 540                         hammer_off_t node_offset, int *errorp);
 541 int             hammer_ref_node(hammer_node_t node);
 542 hammer_node_t   hammer_ref_node_safe(struct hammer_mount *hmp,
 543                         struct hammer_node **cache, int *errorp);
 544 void            hammer_rel_node(hammer_node_t node);
 545 void            hammer_cache_node(hammer_node_t node,
 546                         struct hammer_node **cache);
 547 void            hammer_uncache_node(struct hammer_node **cache);
 548 void            hammer_flush_node(hammer_node_t node);
 549
 550 void hammer_dup_buffer(struct hammer_buffer **bufferp,
 551                         struct hammer_buffer *buffer);
 552 hammer_node_t hammer_alloc_btree(hammer_mount_t hmp, int *errorp);
 553 void *hammer_alloc_record(hammer_mount_t hmp,
 554                         hammer_off_t *rec_offp, u_int8_t rec_type,
 555                         struct hammer_buffer **rec_bufferp,
 556                         int32_t data_len, void **datap,
 557                         struct hammer_buffer **data_bufferp, int *errorp);
 558 int hammer_generate_undo(hammer_mount_t hmp, hammer_off_t undo_offset,
 559                         void *base, int len);
 560
 561 void hammer_put_volume(struct hammer_volume *volume, int flush);
 562 void hammer_put_buffer(struct hammer_buffer *buffer, int flush);
 563
 564 hammer_off_t hammer_freemap_alloc(hammer_mount_t hmp, int *errorp);
 565 hammer_off_t hammer_blockmap_alloc(hammer_mount_t hmp, int zone,
 566                         int bytes, int *errorp);
 567 int hammer_blockmap_free(hammer_mount_t hmp, hammer_off_t bmap_off, int bytes);
 568 hammer_off_t hammer_blockmap_lookup(hammer_mount_t hmp, hammer_off_t bmap_off,
 569                         int *errorp);
 570
 571 void hammer_start_transaction(struct hammer_transaction *trans,
 572                               struct hammer_mount *hmp);
 573 void hammer_start_transaction_tid(struct hammer_transaction *trans,
 574                                   struct hammer_mount *hmp, hammer_tid_t tid);
 575 void hammer_commit_transaction(struct hammer_transaction *trans);
 576 void hammer_abort_transaction(struct hammer_transaction *trans);
 577
 578 void hammer_modify_inode(struct hammer_transaction *trans,
 579                         hammer_inode_t ip, int flags);
 580 int  hammer_create_inode(struct hammer_transaction *trans, struct vattr *vap,
 581                         struct ucred *cred, struct hammer_inode *dip,
 582                         struct hammer_inode **ipp);
 583 void hammer_rel_inode(hammer_inode_t ip, int flush);
 584 int hammer_sync_inode(hammer_inode_t ip, int waitfor, int handle_delete);
 585
 586 int  hammer_ip_add_directory(struct hammer_transaction *trans,
 587                         hammer_inode_t dip, struct namecache *ncp,
 588                         hammer_inode_t nip);
 589 int  hammer_ip_del_directory(struct hammer_transaction *trans,
 590                         hammer_cursor_t cursor, hammer_inode_t dip,
 591                         hammer_inode_t ip);
 592 int  hammer_ip_add_record(struct hammer_transaction *trans,
 593                         hammer_record_t record);
 594 int  hammer_ip_delete_range(struct hammer_transaction *trans,
 595                         hammer_inode_t ip, int64_t ran_beg, int64_t ran_end);
 596 int  hammer_ip_delete_range_all(struct hammer_transaction *trans,
 597                         hammer_inode_t ip);
 598 int  hammer_ip_sync_data(struct hammer_transaction *trans,
 599                         hammer_inode_t ip, int64_t offset,
 600                         void *data, int bytes);
 601 int  hammer_ip_sync_record(hammer_record_t rec);
 602
 603 int hammer_ioctl(hammer_inode_t ip, u_long com, caddr_t data, int fflag,
 604                         struct ucred *cred);
 605
 606 void hammer_io_init(hammer_io_t io, enum hammer_io_type type);
 607 int hammer_io_read(struct vnode *devvp, struct hammer_io *io);
 608 int hammer_io_new(struct vnode *devvp, struct hammer_io *io);
 609 void hammer_io_release(struct hammer_io *io, int flush);
 610 void hammer_io_flush(struct hammer_io *io);
 611 int hammer_io_checkflush(hammer_io_t io);
 612 void hammer_io_clear_modify(struct hammer_io *io);
 613 void hammer_io_waitdep(struct hammer_io *io);
 614
 615 void hammer_modify_volume(hammer_volume_t volume, void *base, int len);
 616 void hammer_modify_buffer(hammer_buffer_t buffer, void *base, int len);
 617
 618 #endif
 619
 620 static __inline void
 621 hammer_modify_node(struct hammer_node *node)
 622 {
 623         hammer_modify_buffer(node->buffer, node->ondisk, sizeof(*node->ondisk));
 624 }
 625