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 1.9 2007/11/26 05:03:11 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/systm.h>
  45 #include <sys/tree.h>
  46 #include <sys/malloc.h>
  47 #include <sys/mount.h>
  48 #include <sys/vnode.h>
  49 #include <sys/globaldata.h>
  50 #include <sys/lockf.h>
  51 #include <sys/buf.h>
  52 #include <sys/queue.h>
  53 #include <sys/globaldata.h>
  54
  55 #include <sys/buf2.h>
  56 #include "hammer_alist.h"
  57 #include "hammer_disk.h"
  58 #include "hammer_mount.h"
  59
  60 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  61
  62 MALLOC_DECLARE(M_HAMMER);
  63
  64 struct hammer_mount;
  65
  66 /*
  67  * Key structure used for custom RB tree inode lookups.  This prototypes
  68  * the function hammer_ino_rb_tree_RB_LOOKUP_INFO(root, info).
  69  */
  70 typedef struct hammer_inode_info {
  71         u_int64_t       obj_id;         /* (key) object identifier */
  72         hammer_tid_t    obj_asof;       /* (key) snapshot transid or 0 */
  73 } *hammer_inode_info_t;
  74
  75 /*
  76  * HAMMER Transaction tracking
  77  */
  78 struct hammer_transaction {
  79         struct hammer_mount *hmp;
  80         hammer_tid_t    tid;
  81         struct hammer_volume *rootvol;
  82 };
  83
  84 typedef struct hammer_transaction *hammer_transaction_t;
  85
  86 /*
  87  * HAMMER locks
  88  */
  89 struct hammer_lock {
  90         int     refs;
  91         int     lockcount;
  92         int     wanted;
  93         struct thread *locktd;
  94 };
  95
  96 static __inline int
  97 hammer_islocked(struct hammer_lock *lock)
  98 {
  99         return(lock->lockcount != 0);
 100 }
 101
 102 static __inline int
 103 hammer_islastref(struct hammer_lock *lock)
 104 {
 105         return(lock->refs == 1);
 106 }
 107
 108 /*
 109  * Structure used to represent an inode in-memory.
 110  *
 111  * The record and data associated with an inode may be out of sync with
 112  * the disk (xDIRTY flags), or not even on the disk at all (ONDISK flag
 113  * clear).
 114  *
 115  * An inode may also hold a cache of unsynchronized records, used for
 116  * database and directories only.  Unsynchronized regular file data is
 117  * stored in the buffer cache.
 118  *
 119  * NOTE: A file which is created and destroyed within the initial
 120  * synchronization period can wind up not doing any disk I/O at all.
 121  *
 122  * Finally, an inode may cache numerous disk-referencing B-Tree cursors.
 123  */
 124 struct hammer_ino_rb_tree;
 125 struct hammer_inode;
 126 RB_HEAD(hammer_ino_rb_tree, hammer_inode);
 127 RB_PROTOTYPEX(hammer_ino_rb_tree, INFO, hammer_inode, rb_node,
 128               hammer_ino_rb_compare, hammer_inode_info_t);
 129
 130 struct hammer_rec_rb_tree;
 131 struct hammer_record;
 132 RB_HEAD(hammer_rec_rb_tree, hammer_record);
 133 RB_PROTOTYPEX(hammer_rec_rb_tree, INFO, hammer_record, rb_node,
 134               hammer_rec_rb_compare, hammer_base_elm_t);
 135
 136 TAILQ_HEAD(hammer_node_list, hammer_node);
 137
 138 struct hammer_inode {
 139         RB_ENTRY(hammer_inode) rb_node;
 140         u_int64_t       obj_id;         /* (key) object identifier */
 141         hammer_tid_t    obj_asof;       /* (key) snapshot transid or 0 */
 142         hammer_tid_t    last_tid;       /* last modified tid (for fsync) */
 143         struct hammer_mount *hmp;
 144         int             flags;
 145         struct vnode    *vp;
 146         struct lockf    advlock;
 147         struct hammer_lock lock;
 148         struct hammer_inode_record ino_rec;
 149         struct hammer_inode_data ino_data;
 150         struct hammer_rec_rb_tree rec_tree;     /* red-black record tree */
 151         struct hammer_node      *cache; /* cached B-Tree node shortcut */
 152 };
 153
 154 typedef struct hammer_inode *hammer_inode_t;
 155
 156 #define VTOI(vp)        ((struct hammer_inode *)(vp)->v_data)
 157
 158 #define HAMMER_INODE_DDIRTY     0x0001  /* in-memory ino_data is dirty */
 159 #define HAMMER_INODE_RDIRTY     0x0002  /* in-memory ino_rec is dirty */
 160 #define HAMMER_INODE_ITIMES     0x0004  /* in-memory mtime/atime modified */
 161 #define HAMMER_INODE_ONDISK     0x0010  /* inode is on-disk (else not yet) */
 162 #define HAMMER_INODE_FLUSH      0x0020  /* flush on last ref */
 163 #define HAMMER_INODE_TID        0x0040  /* update in-memory last_tid */
 164 #define HAMMER_INODE_DELETED    0x0080  /* inode ready for deletion */
 165
 166 #define HAMMER_MAX_INODE_CURSORS        4
 167
 168 /*
 169  * Structure used to represent an unsynchronized record in-memory.  This
 170  * structure is orgranized in a per-inode RB-tree.  If the inode is not
 171  * on disk then neither are any records and the in-memory record tree
 172  * represents the entire contents of the inode.  If the inode is on disk
 173  * then the on-disk B-Tree is scanned in parallel with the in-memory
 174  * RB-Tree to synthesize the current state of the file.
 175  *
 176  * Only current (delete_tid == 0) unsynchronized records are kept in-memory.
 177  */
 178 struct hammer_record {
 179         RB_ENTRY(hammer_record)         rb_node;
 180         struct hammer_lock              lock;
 181         struct hammer_inode             *ip;
 182         union hammer_record_ondisk      rec;
 183         union hammer_data_ondisk        *data;
 184         int                             flags;
 185 };
 186
 187 typedef struct hammer_record *hammer_record_t;
 188
 189 #define HAMMER_RECF_ALLOCDATA           0x0001
 190 #define HAMMER_RECF_ONRBTREE            0x0002
 191 #define HAMMER_RECF_DELETED             0x0004
 192 #define HAMMER_RECF_EMBEDDED_DATA       0x0008
 193
 194 /*
 195  * Structures used to internally represent a volume and a cluster
 196  */
 197 struct hammer_volume;
 198 struct hammer_cluster;
 199 struct hammer_supercl;
 200 struct hammer_buffer;
 201 struct hammer_node;
 202 RB_HEAD(hammer_vol_rb_tree, hammer_volume);
 203 RB_HEAD(hammer_clu_rb_tree, hammer_cluster);
 204 RB_HEAD(hammer_scl_rb_tree, hammer_supercl);
 205 RB_HEAD(hammer_buf_rb_tree, hammer_buffer);
 206 RB_HEAD(hammer_nod_rb_tree, hammer_node);
 207
 208 RB_PROTOTYPE2(hammer_vol_rb_tree, hammer_volume, rb_node,
 209               hammer_vol_rb_compare, int32_t);
 210 RB_PROTOTYPE2(hammer_clu_rb_tree, hammer_cluster, rb_node,
 211               hammer_clu_rb_compare, int32_t);
 212 RB_PROTOTYPE2(hammer_scl_rb_tree, hammer_supercl, rb_node,
 213               hammer_scl_rb_compare, int32_t);
 214 RB_PROTOTYPE2(hammer_buf_rb_tree, hammer_buffer, rb_node,
 215               hammer_buf_rb_compare, int32_t);
 216 RB_PROTOTYPE2(hammer_nod_rb_tree, hammer_node, rb_node,
 217               hammer_nod_rb_compare, int32_t);
 218
 219 /*
 220  * IO management - embedded at the head of various in-memory structures
 221  */
 222 enum hammer_io_type { HAMMER_STRUCTURE_VOLUME,
 223                       HAMMER_STRUCTURE_SUPERCL,
 224                       HAMMER_STRUCTURE_CLUSTER,
 225                       HAMMER_STRUCTURE_BUFFER };
 226
 227 union hammer_io_structure;
 228
 229 struct worklist {
 230         LIST_ENTRY(worklist) node;
 231 };
 232
 233 struct hammer_io {
 234         struct worklist worklist;
 235         struct hammer_lock lock;
 236         enum hammer_io_type type;
 237         struct buf      *bp;
 238         int64_t         offset;
 239         u_int           modified : 1;   /* bp's data was modified */
 240         u_int           released : 1;   /* bp released (w/ B_LOCKED set) */
 241 };
 242
 243 typedef struct hammer_io *hammer_io_t;
 244
 245 /*
 246  * In-memory volume representing on-disk buffer
 247  */
 248 struct hammer_volume {
 249         struct hammer_io io;
 250         RB_ENTRY(hammer_volume) rb_node;
 251         struct hammer_clu_rb_tree rb_clus_root;
 252         struct hammer_scl_rb_tree rb_scls_root;
 253         struct hammer_volume_ondisk *ondisk;
 254         struct hammer_alist_live alist;
 255         int32_t vol_no;
 256         int32_t vol_clsize;
 257         int64_t cluster_base;   /* base offset of cluster 0 */
 258         char    *vol_name;
 259         struct vnode *devvp;
 260         struct hammer_mount *hmp;
 261         int     vol_flags;
 262 };
 263
 264 typedef struct hammer_volume *hammer_volume_t;
 265
 266 /*
 267  * In-memory super-cluster representing on-disk buffer
 268  */
 269 struct hammer_supercl {
 270         struct hammer_io io;
 271         RB_ENTRY(hammer_supercl) rb_node;
 272         struct hammer_supercl_ondisk *ondisk;
 273         struct hammer_volume *volume;
 274         struct hammer_alist_live alist;
 275         int32_t scl_no;
 276 };
 277
 278 typedef struct hammer_supercl *hammer_supercl_t;
 279
 280 /*
 281  * In-memory cluster representing on-disk buffer
 282  *
 283  * The cluster's indexing range is cached in hammer_cluster, separate
 284  * from the ondisk info in order to allow cursors to point to it.
 285  */
 286 struct hammer_cluster {
 287         struct hammer_io io;
 288         RB_ENTRY(hammer_cluster) rb_node;
 289         struct hammer_buf_rb_tree rb_bufs_root;
 290         struct hammer_cluster_ondisk *ondisk;
 291         struct hammer_volume *volume;
 292         struct hammer_alist_live alist_master;
 293         struct hammer_alist_live alist_btree;
 294         struct hammer_alist_live alist_record;
 295         struct hammer_alist_live alist_mdata;
 296         struct hammer_nod_rb_tree rb_nods_root; /* cursors in cluster */
 297         struct hammer_base_elm clu_btree_beg;   /* copy of on-disk info */
 298         struct hammer_base_elm clu_btree_end;   /* copy of on-disk info */
 299         int32_t clu_no;
 300 };
 301
 302 typedef struct hammer_cluster *hammer_cluster_t;
 303
 304 /*
 305  * In-memory buffer (other then volume, super-cluster, or cluster),
 306  * representing an on-disk buffer.
 307  */
 308 struct hammer_buffer {
 309         struct hammer_io io;
 310         RB_ENTRY(hammer_buffer) rb_node;
 311         hammer_fsbuf_ondisk_t ondisk;
 312         struct hammer_volume *volume;
 313         struct hammer_cluster *cluster;
 314         int32_t buf_no;
 315         u_int64_t buf_type;
 316         struct hammer_alist_live alist;
 317         struct hammer_node_list clist;
 318         struct hammer_node *save_scan;
 319 };
 320
 321 typedef struct hammer_buffer *hammer_buffer_t;
 322
 323 /*
 324  * In-memory B-Tree node, representing an on-disk B-Tree node.
 325  *
 326  * This is a hang-on structure which is backed by a hammer_buffer,
 327  * indexed by a hammer_cluster, and used for fine-grained locking of
 328  * B-Tree nodes in order to properly control lock ordering.  A hammer_buffer
 329  * can contain multiple nodes representing wildly disassociated portions
 330  * of the B-Tree so locking cannot be done on a buffer-by-buffer basis.
 331  *
 332  * This structure uses a cluster-relative index to reduce the number
 333  * of layers required to access it, and also because all on-disk B-Tree
 334  * references are cluster-relative offsets.
 335  */
 336 struct hammer_node {
 337         struct hammer_lock      lock;           /* node-by-node lock */
 338         TAILQ_ENTRY(hammer_node) entry;         /* per-buffer linkage */
 339         RB_ENTRY(hammer_node)   rb_node;        /* per-cluster linkage */
 340         int32_t                 node_offset;    /* cluster-rel offset */
 341         struct hammer_cluster   *cluster;
 342         struct hammer_buffer    *buffer;        /* backing buffer */
 343         hammer_node_ondisk_t    ondisk;         /* ptr to on-disk structure */
 344         struct hammer_node      **cache1;       /* passive cache(s) */
 345         struct hammer_node      **cache2;
 346 };
 347
 348 typedef struct hammer_node      *hammer_node_t;
 349
 350 /*
 351  * Common I/O management structure - embedded in in-memory structures
 352  * which are backed by filesystem buffers.
 353  */
 354 union hammer_io_structure {
 355         struct hammer_io        io;
 356         struct hammer_volume    volume;
 357         struct hammer_supercl   supercl;
 358         struct hammer_cluster   cluster;
 359         struct hammer_buffer    buffer;
 360 };
 361
 362 #define HAMFS_CLUSTER_DIRTY     0x0001
 363
 364 #include "hammer_cursor.h"
 365
 366 /*
 367  * Internal hammer mount data structure
 368  */
 369 struct hammer_mount {
 370         struct mount *mp;
 371         /*struct vnode *rootvp;*/
 372         struct hammer_ino_rb_tree rb_inos_root;
 373         struct hammer_vol_rb_tree rb_vols_root;
 374         struct hammer_volume *rootvol;
 375         struct hammer_cluster *rootcl;
 376         char *zbuf;     /* HAMMER_BUFSIZE bytes worth of all-zeros */
 377         uuid_t  fsid;
 378         udev_t  fsid_udev;
 379         u_int32_t namekey_iterator;
 380 };
 381
 382 typedef struct hammer_mount     *hammer_mount_t;
 383
 384 #endif
 385
 386 #if defined(_KERNEL)
 387
 388 extern struct vop_ops hammer_vnode_vops;
 389 extern struct hammer_alist_config Buf_alist_config;
 390 extern struct hammer_alist_config Vol_normal_alist_config;
 391 extern struct hammer_alist_config Vol_super_alist_config;
 392 extern struct hammer_alist_config Supercl_alist_config;
 393 extern struct hammer_alist_config Clu_master_alist_config;
 394 extern struct hammer_alist_config Clu_slave_alist_config;
 395 extern struct bio_ops hammer_bioops;
 396
 397 int     hammer_vop_inactive(struct vop_inactive_args *);
 398 int     hammer_vop_reclaim(struct vop_reclaim_args *);
 399 int     hammer_vfs_vget(struct mount *mp, ino_t ino, struct  vnode **vpp);
 400
 401 int     hammer_get_vnode(struct hammer_inode *ip, int lktype,
 402                         struct vnode **vpp);
 403 struct hammer_inode *hammer_get_inode(hammer_mount_t hmp,
 404                         u_int64_t obj_id, int *errorp);
 405 int     hammer_update_inode(hammer_transaction_t trans, hammer_inode_t ip);
 406 void    hammer_put_inode(struct hammer_inode *ip);
 407 void    hammer_put_inode_ref(struct hammer_inode *ip);
 408
 409 int     hammer_unload_inode(hammer_inode_t ip, void *data __unused);
 410 int     hammer_unload_volume(hammer_volume_t volume, void *data __unused);
 411 int     hammer_unload_supercl(hammer_supercl_t supercl, void *data __unused);
 412 int     hammer_unload_cluster(hammer_cluster_t cluster, void *data __unused);
 413 int     hammer_unload_buffer(hammer_buffer_t buffer, void *data __unused);
 414 int     hammer_install_volume(hammer_mount_t hmp, const char *volname);
 415
 416 int     hammer_ip_lookup(hammer_cursor_t cursor, hammer_inode_t ip);
 417 int     hammer_ip_first(hammer_cursor_t cursor, hammer_inode_t ip);
 418 int     hammer_ip_next(hammer_cursor_t cursor);
 419 int     hammer_ip_resolve_data(hammer_cursor_t cursor);
 420 hammer_record_t
 421         hammer_alloc_mem_record(struct hammer_transaction *trans,
 422                                hammer_inode_t ip);
 423 void    hammer_rel_mem_record(struct hammer_record **recordp);
 424 void    hammer_free_mem_record(hammer_record_t record);
 425
 426 int     hammer_cursor_up(hammer_cursor_t cursor);
 427 int     hammer_cursor_toroot(hammer_cursor_t cursor);
 428 int     hammer_cursor_down(hammer_cursor_t cursor);
 429
 430 void    hammer_lock_ex(struct hammer_lock *lock);
 431 int     hammer_lock_ex_try(struct hammer_lock *lock);
 432 void    hammer_lock_sh(struct hammer_lock *lock);
 433 void    hammer_unlock(struct hammer_lock *lock);
 434 void    hammer_ref(struct hammer_lock *lock);
 435 void    hammer_unref(struct hammer_lock *lock);
 436 void    hammer_downgrade(struct hammer_lock *lock);
 437
 438 u_int32_t hammer_to_unix_xid(uuid_t *uuid);
 439 void hammer_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
 440 void    hammer_to_timespec(hammer_tid_t tid, struct timespec *ts);
 441 hammer_tid_t hammer_timespec_to_transid(struct timespec *ts);
 442 hammer_tid_t hammer_alloc_tid(hammer_transaction_t trans);
 443 hammer_tid_t hammer_alloc_recid(hammer_transaction_t trans);
 444
 445 enum vtype hammer_get_vnode_type(u_int8_t obj_type);
 446 int hammer_get_dtype(u_int8_t obj_type);
 447 u_int8_t hammer_get_obj_type(enum vtype vtype);
 448 int64_t hammer_directory_namekey(void *name, int len);
 449
 450 int     hammer_init_cursor_hmp(hammer_cursor_t cursor, hammer_mount_t hmp);
 451 int     hammer_init_cursor_ip(hammer_cursor_t cursor, hammer_inode_t ip);
 452 void    hammer_done_cursor(hammer_cursor_t cursor);
 453 void    hammer_mem_done(hammer_cursor_t cursor);
 454
 455 int     hammer_btree_lookup(hammer_cursor_t cursor);
 456 int     hammer_btree_extract(hammer_cursor_t cursor, int flags);
 457 int     hammer_btree_iterate(hammer_cursor_t cursor);
 458 int     hammer_btree_insert(hammer_cursor_t cursor, hammer_btree_elm_t elm);
 459 int     hammer_btree_delete(hammer_cursor_t cursor);
 460 int     hammer_btree_cmp(hammer_base_elm_t key1, hammer_base_elm_t key2);
 461 int     hammer_btree_range_cmp(hammer_cursor_t cursor, hammer_base_elm_t key2);
 462 void    hammer_print_btree_node(hammer_node_ondisk_t ondisk);
 463 void    hammer_print_btree_elm(hammer_btree_elm_t elm, u_int8_t type, int i);
 464
 465 void    *hammer_bread(struct hammer_cluster *cluster, int32_t cloff,
 466                       u_int64_t buf_type, int *errorp,
 467                       struct hammer_buffer **bufferp);
 468
 469 hammer_volume_t hammer_get_root_volume(hammer_mount_t hmp, int *errorp);
 470 hammer_cluster_t hammer_get_root_cluster(hammer_mount_t hmp, int *errorp);
 471
 472 hammer_volume_t hammer_get_volume(hammer_mount_t hmp,
 473                         int32_t vol_no, int *errorp);
 474 hammer_supercl_t hammer_get_supercl(hammer_volume_t volume,
 475                         int32_t scl_no, int *errorp, int isnew);
 476 hammer_cluster_t hammer_get_cluster(hammer_volume_t volume,
 477                         int32_t clu_no, int *errorp, int isnew);
 478 hammer_buffer_t hammer_get_buffer(hammer_cluster_t cluster,
 479                         int32_t buf_no, u_int64_t buf_type, int *errorp);
 480
 481 int             hammer_ref_cluster(hammer_cluster_t cluster);
 482 int             hammer_ref_buffer(hammer_buffer_t buffer);
 483 void            hammer_flush_buffer_nodes(hammer_buffer_t buffer);
 484
 485
 486 void            hammer_rel_volume(hammer_volume_t volume, int flush);
 487 void            hammer_rel_supercl(hammer_supercl_t supercl, int flush);
 488 void            hammer_rel_cluster(hammer_cluster_t cluster, int flush);
 489 void            hammer_rel_buffer(hammer_buffer_t buffer, int flush);
 490
 491 hammer_node_t   hammer_get_node(hammer_cluster_t cluster,
 492                         int32_t node_offset, int *errorp);
 493 int             hammer_ref_node(hammer_node_t node);
 494 void            hammer_rel_node(hammer_node_t node);
 495 void            hammer_cache_node(hammer_node_t node,
 496                         struct hammer_node **cache);
 497 void            hammer_uncache_node(struct hammer_node **cache);
 498 void            hammer_flush_node(hammer_node_t node);
 499
 500 void hammer_dup_buffer(struct hammer_buffer **bufferp,
 501                         struct hammer_buffer *buffer);
 502 void hammer_dup_cluster(struct hammer_cluster **clusterp,
 503                         struct hammer_cluster *cluster);
 504 hammer_node_t hammer_alloc_btree(struct hammer_cluster *cluster, int *errorp);
 505 void *hammer_alloc_data(struct hammer_cluster *cluster, int32_t bytes,
 506                         int *errorp, struct hammer_buffer **bufferp);
 507 void *hammer_alloc_record(struct hammer_cluster *cluster,
 508                         int *errorp, struct hammer_buffer **bufferp);
 509 void hammer_free_btree_ptr(struct hammer_buffer *buffer,
 510                         hammer_node_ondisk_t node);
 511 void hammer_free_data_ptr(struct hammer_buffer *buffer,
 512                         void *data, int bytes);
 513 void hammer_free_record_ptr(struct hammer_buffer *buffer,
 514                         union hammer_record_ondisk *rec);
 515 void hammer_free_btree(struct hammer_cluster *cluster, int32_t bclu_offset);
 516 void hammer_free_data(struct hammer_cluster *cluster, int32_t bclu_offset,
 517                         int32_t bytes);
 518 void hammer_free_record(struct hammer_cluster *cluster, int32_t bclu_offset);
 519
 520 void hammer_put_volume(struct hammer_volume *volume, int flush);
 521 void hammer_put_supercl(struct hammer_supercl *supercl, int flush);
 522 void hammer_put_cluster(struct hammer_cluster *cluster, int flush);
 523 void hammer_put_buffer(struct hammer_buffer *buffer, int flush);
 524
 525 void hammer_init_alist_config(void);
 526
 527 void hammer_start_transaction(struct hammer_transaction *trans,
 528                               struct hammer_mount *hmp);
 529 void hammer_commit_transaction(struct hammer_transaction *trans);
 530 void hammer_abort_transaction(struct hammer_transaction *trans);
 531
 532 void hammer_modify_inode(struct hammer_transaction *trans,
 533                         hammer_inode_t ip, int flags);
 534 int  hammer_create_inode(struct hammer_transaction *trans, struct vattr *vap,
 535                         struct ucred *cred, struct hammer_inode *dip,
 536                         struct hammer_inode **ipp);
 537 void hammer_rel_inode(hammer_inode_t ip, int flush);
 538 int hammer_sync_inode(hammer_inode_t ip, int waitfor, int handle_delete);
 539
 540 int  hammer_ip_add_directory(struct hammer_transaction *trans,
 541                         hammer_inode_t dip, struct namecache *ncp,
 542                         hammer_inode_t nip);
 543 int  hammer_ip_del_directory(struct hammer_transaction *trans,
 544                         hammer_cursor_t cursor, hammer_inode_t dip,
 545                         hammer_inode_t ip);
 546 int  hammer_ip_delete_range(struct hammer_transaction *trans,
 547                         hammer_inode_t ip, int64_t ran_beg, int64_t ran_end);
 548 int  hammer_ip_sync_data(struct hammer_transaction *trans,
 549                         hammer_inode_t ip, int64_t offset,
 550                         void *data, int bytes);
 551 int  hammer_ip_sync_record(hammer_record_t rec);
 552
 553 int hammer_io_read(struct vnode *devvp, struct hammer_io *io);
 554 int hammer_io_new(struct vnode *devvp, struct hammer_io *io);
 555 void hammer_io_release(struct hammer_io *io, int flush);
 556 int hammer_io_checkflush(hammer_io_t io);
 557
 558 #endif
 559
 560 /*
 561  * Inline support functions (not kernel specific)
 562  */
 563 static __inline void
 564 hammer_modify_volume(struct hammer_volume *volume)
 565 {
 566         volume->io.modified = 1;
 567 }
 568
 569 static __inline void
 570 hammer_modify_supercl(struct hammer_supercl *supercl)
 571 {
 572         supercl->io.modified = 1;
 573 }
 574
 575 static __inline void
 576 hammer_modify_cluster(struct hammer_cluster *cluster)
 577 {
 578         cluster->io.modified = 1;
 579 }
 580
 581 static __inline void
 582 hammer_modify_buffer(struct hammer_buffer *buffer)
 583 {
 584         buffer->io.modified = 1;
 585 }
 586
 587 static __inline void
 588 hammer_modify_node(struct hammer_node *node)
 589 {
 590         node->buffer->io.modified = 1;
 591 }
 592
 593 /*
 594  * Return the cluster-relative byte offset of an element within a buffer
 595  */
 596 static __inline int
 597 hammer_bclu_offset(struct hammer_buffer *buffer, void *ptr)
 598 {
 599         int bclu_offset;
 600
 601         bclu_offset = buffer->buf_no * HAMMER_BUFSIZE +
 602                       ((char *)ptr - (char *)buffer->ondisk);
 603         return(bclu_offset);
 604 }
 605