sys/vfs/hammer2/hammer2.h

   1 /*
   2  * Copyright (c) 2011-2012 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@dragonflybsd.org>
   6  * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 /*
  37  * This header file contains structures used internally by the HAMMER2
  38  * implementation.  See hammer2_disk.h for on-disk structures.
  39  */
  40
  41 #ifndef _VFS_HAMMER2_HAMMER2_H_
  42 #define _VFS_HAMMER2_HAMMER2_H_
  43
  44 #include <sys/param.h>
  45 #include <sys/types.h>
  46 #include <sys/kernel.h>
  47 #include <sys/conf.h>
  48 #include <sys/systm.h>
  49 #include <sys/tree.h>
  50 #include <sys/malloc.h>
  51 #include <sys/mount.h>
  52 #include <sys/vnode.h>
  53 #include <sys/proc.h>
  54 #include <sys/mountctl.h>
  55 #include <sys/priv.h>
  56 #include <sys/stat.h>
  57 #include <sys/thread.h>
  58 #include <sys/globaldata.h>
  59 #include <sys/lockf.h>
  60 #include <sys/buf.h>
  61 #include <sys/queue.h>
  62 #include <sys/limits.h>
  63 #include <sys/buf2.h>
  64 #include <sys/signal2.h>
  65 #include <sys/tree.h>
  66 #include <sys/dmsg.h>
  67
  68 #include "hammer2_disk.h"
  69 #include "hammer2_mount.h"
  70 #include "hammer2_ioctl.h"
  71 #include "hammer2_ccms.h"
  72
  73 struct hammer2_chain;
  74 struct hammer2_inode;
  75 struct hammer2_mount;
  76 struct hammer2_pfsmount;
  77 struct hammer2_span;
  78 struct hammer2_state;
  79 struct hammer2_msg;
  80
  81 /*
  82  * The chain structure tracks blockref recursions all the way to
  83  * the root volume.  These consist of indirect blocks, inodes,
  84  * and eventually the volume header.
  85  *
  86  * The chain structure is embedded in the hammer2_mount, hammer2_inode,
  87  * and other system memory structures.  The chain structure typically
  88  * implements the reference count and busy flag for the larger structure.
  89  *
  90  * It is always possible to track a chain element all the way back to the
  91  * root by following the (parent) links.  (index) is a type-dependent index
  92  * in the parent indicating where in the parent the chain element resides.
  93  *
  94  * When a blockref is added or deleted the related chain element is marked
  95  * modified and all of its parents are marked SUBMODIFIED (the parent
  96  * recursion can stop once we hit a node that is already marked SUBMODIFIED).
  97  * A deleted chain element must remain intact until synchronized against
  98  * its parent.
  99  *
 100  * The blockref at (parent, index) is not adjusted until the modified chain
 101  * element is flushed and unmarked.  Until then the child's blockref may
 102  * not match the blockref at (parent, index).
 103  */
 104 RB_HEAD(hammer2_chain_tree, hammer2_chain);
 105 TAILQ_HEAD(flush_deferral_list, hammer2_chain);
 106
 107 struct hammer2_chain {
 108         ccms_cst_t      cst;                    /* attr or data cst */
 109         struct hammer2_blockref bref;
 110         struct hammer2_blockref bref_flush;     /* synchronized w/MOVED bit */
 111         struct hammer2_chain    *parent;        /* return chain to root */
 112         struct hammer2_chain_tree rbhead;
 113         struct hammer2_state    *state;         /* if active cache msg */
 114         RB_ENTRY(hammer2_chain) rbnode;
 115         TAILQ_ENTRY(hammer2_chain) flush_node;  /* flush deferral list */
 116         union {
 117                 struct hammer2_inode *ip;
 118                 struct hammer2_indblock *np;
 119                 struct hammer2_data *dp;
 120                 void *mem;
 121         } u;
 122
 123         struct buf      *bp;            /* buffer cache (ro) */
 124         hammer2_media_data_t *data;     /* modified copy of data (rw) */
 125         u_int           bytes;          /* physical size of data */
 126         int             index;          /* index in parent */
 127         u_int           flushing;       /* element undergoing flush (count) */
 128         u_int           refs;
 129         u_int           flags;
 130 };
 131
 132 typedef struct hammer2_chain hammer2_chain_t;
 133
 134 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2);
 135 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp);
 136
 137 /*
 138  * MOVED - This bit is set during the flush when the MODIFIED bit is cleared,
 139  *         indicating that the parent's blocktable must inherit a change to
 140  *         the bref (typically a block reallocation)
 141  *
 142  *         It must also be set in situations where a chain is not MODIFIED
 143  *         but whos bref has changed (typically due to fields other than
 144  *         a block reallocation).
 145  */
 146 #define HAMMER2_CHAIN_MODIFIED          0x00000001      /* active mods */
 147 #define HAMMER2_CHAIN_DIRTYEMBED        0x00000002      /* inode embedded */
 148 #define HAMMER2_CHAIN_DIRTYBP           0x00000004      /* dirty on unlock */
 149 #define HAMMER2_CHAIN_SUBMODIFIED       0x00000008      /* 1+ subs modified */
 150 #define HAMMER2_CHAIN_DELETED           0x00000010      /* deleted chain */
 151 #define HAMMER2_CHAIN_INITIAL           0x00000020      /* initial create */
 152 #define HAMMER2_CHAIN_FLUSHED           0x00000040      /* flush on unlock */
 153 #define HAMMER2_CHAIN_MOVED             0x00000080      /* bref changed */
 154 #define HAMMER2_CHAIN_IOFLUSH           0x00000100      /* bawrite on put */
 155 #define HAMMER2_CHAIN_DEFERRED          0x00000200      /* on a deferral list*/
 156 #define HAMMER2_CHAIN_DESTROYED         0x00000400      /* destroying inode */
 157 #define HAMMER2_CHAIN_MODIFIED_AUX      0x00000800      /* hmp->vchain only */
 158 #define HAMMER2_CHAIN_MODIFY_TID        0x00001000      /* mod updates field */
 159 #define HAMMER2_CHAIN_MOUNTED           0x00002000      /* PFS is mounted */
 160 #define HAMMER2_CHAIN_ONRBTREE          0x00004000      /* on parent RB tree */
 161
 162 /*
 163  * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
 164  */
 165 #define HAMMER2_LOOKUP_NOLOCK           0x00000001      /* ref only */
 166 #define HAMMER2_LOOKUP_NODATA           0x00000002      /* data left NULL */
 167 #define HAMMER2_LOOKUP_SHARED           0x00000100
 168
 169 /*
 170  * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
 171  *
 172  * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
 173  *       blocks in the INITIAL-create state.
 174  *
 175  * NOTE: NO_MODIFY_TID tells the function to not set HAMMER2_CHAIN_MODIFY_TID
 176  *       when marking the chain modified (used when a sub-chain modification
 177  *       propagates upward).
 178  */
 179 #define HAMMER2_MODIFY_NOSUB            0x00000001      /* do not set SUBMOD */
 180 #define HAMMER2_MODIFY_OPTDATA          0x00000002      /* data can be NULL */
 181 #define HAMMER2_MODIFY_NO_MODIFY_TID    0x00000004
 182
 183 /*
 184  * Flags passed to hammer2_chain_lock()
 185  */
 186 #define HAMMER2_RESOLVE_NEVER           1
 187 #define HAMMER2_RESOLVE_MAYBE           2
 188 #define HAMMER2_RESOLVE_ALWAYS          3
 189 #define HAMMER2_RESOLVE_MASK            0x0F
 190
 191 #define HAMMER2_RESOLVE_SHARED          0x10
 192
 193 /*
 194  * Cluster different types of storage together for allocations
 195  */
 196 #define HAMMER2_FREECACHE_INODE         0
 197 #define HAMMER2_FREECACHE_INDIR         1
 198 #define HAMMER2_FREECACHE_DATA          2
 199 #define HAMMER2_FREECACHE_UNUSED3       3
 200 #define HAMMER2_FREECACHE_TYPES         4
 201
 202 /*
 203  * BMAP read-ahead maximum parameters
 204  */
 205 #define HAMMER2_BMAP_COUNT              16      /* max bmap read-ahead */
 206 #define HAMMER2_BMAP_BYTES              (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
 207
 208 /*
 209  * Misc
 210  */
 211 #define HAMMER2_FLUSH_DEPTH_LIMIT       40      /* stack recursion limit */
 212
 213 /*
 214  * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
 215  *
 216  * There is an in-memory representation of all on-media data structure.
 217  *
 218  * When accessed read-only the data will be mapped to the related buffer
 219  * cache buffer.
 220  *
 221  * When accessed read-write (marked modified) a kmalloc()'d copy of the
 222  * is created which can then be modified.  The copy is destroyed when a
 223  * filesystem block is allocated to replace it.
 224  *
 225  * Active inodes (those with vnodes attached) will maintain the kmalloc()'d
 226  * copy for both the read-only and the read-write case.  The combination of
 227  * (bp) and (data) determines whether (data) was allocated or not.
 228  *
 229  * The in-memory representation may remain cached (for example in order to
 230  * placemark clustering locks) even after the related data has been
 231  * detached.
 232  */
 233
 234 /*
 235  * A hammer2 inode.
 236  *
 237  * NOTE: The inode's attribute CST which is also used to lock the inode
 238  *       is embedded in the chain (chain.cst) and aliased w/ attr_cst.
 239  */
 240 struct hammer2_inode {
 241         struct hammer2_mount    *hmp;           /* Global mount */
 242         struct hammer2_pfsmount *pmp;           /* PFS mount */
 243         struct hammer2_inode    *pip;           /* parent inode */
 244         struct vnode            *vp;
 245         ccms_cst_t              topo_cst;       /* directory topology cst */
 246         hammer2_chain_t         chain;
 247         struct hammer2_inode_data ip_data;
 248         struct lockf            advlock;
 249         hammer2_off_t           delta_dcount;   /* adjust data_count */
 250         hammer2_off_t           delta_icount;   /* adjust inode_count */
 251 };
 252
 253 typedef struct hammer2_inode hammer2_inode_t;
 254
 255 /*
 256  * A hammer2 indirect block
 257  */
 258 struct hammer2_indblock {
 259         hammer2_chain_t         chain;
 260 };
 261
 262 typedef struct hammer2_indblock hammer2_indblock_t;
 263
 264 /*
 265  * A hammer2 data block
 266  */
 267 struct hammer2_data {
 268         hammer2_chain_t         chain;
 269 };
 270
 271 typedef struct hammer2_data hammer2_data_t;
 272
 273 struct hammer2_freecache {
 274         hammer2_off_t   bulk;
 275         hammer2_off_t   single;
 276 };
 277
 278 typedef struct hammer2_freecache hammer2_freecache_t;
 279
 280 /*
 281  * Global (per device) mount structure for device (aka vp->v_mount->hmp)
 282  */
 283 struct hammer2_mount {
 284         struct vnode    *devvp;         /* device vnode */
 285         int             ronly;          /* read-only mount */
 286         int             pmp_count;      /* PFS mounts backed by us */
 287         TAILQ_ENTRY(hammer2_mount) mntentry; /* hammer2_mntlist */
 288
 289         struct malloc_type *minode;
 290         int             ninodes;
 291         int             maxinodes;
 292
 293         struct malloc_type *mchain;
 294         int             nipstacks;
 295         int             maxipstacks;
 296         hammer2_chain_t vchain;         /* anchor chain */
 297         hammer2_chain_t *schain;        /* super-root */
 298         struct lock     alloclk;        /* lockmgr lock */
 299         struct lock     voldatalk;      /* lockmgr lock */
 300
 301         int             volhdrno;       /* last volhdrno written */
 302         hammer2_volume_data_t voldata;
 303         hammer2_volume_data_t volsync;  /* synchronized voldata */
 304         hammer2_freecache_t freecache[HAMMER2_FREECACHE_TYPES]
 305                                      [HAMMER2_MAX_RADIX+1];
 306 };
 307
 308 typedef struct hammer2_mount hammer2_mount_t;
 309
 310 /*
 311  * Per-PFS mount structure for device (aka vp->v_mount)
 312  */
 313 struct hammer2_pfsmount {
 314         struct mount            *mp;            /* kernel mount */
 315         struct hammer2_mount    *hmp;           /* device global mount */
 316         hammer2_chain_t         *rchain;        /* PFS root chain */
 317         hammer2_inode_t         *iroot;         /* PFS root inode */
 318         ccms_domain_t           ccms_dom;
 319         struct netexport        export;         /* nfs export */
 320         int                     ronly;          /* read-only mount */
 321         struct malloc_type      *mmsg;
 322         kdmsg_iocom_t           iocom;
 323 };
 324
 325 typedef struct hammer2_pfsmount hammer2_pfsmount_t;
 326
 327 #if defined(_KERNEL)
 328
 329 MALLOC_DECLARE(M_HAMMER2);
 330
 331 #define VTOI(vp)        ((hammer2_inode_t *)(vp)->v_data)
 332 #define ITOV(ip)        ((ip)->vp)
 333
 334 static __inline
 335 hammer2_pfsmount_t *
 336 MPTOPMP(struct mount *mp)
 337 {
 338         return ((hammer2_pfsmount_t *)mp->mnt_data);
 339 }
 340
 341 static __inline
 342 hammer2_mount_t *
 343 MPTOHMP(struct mount *mp)
 344 {
 345         return (((hammer2_pfsmount_t *)mp->mnt_data)->hmp);
 346 }
 347
 348 extern struct vop_ops hammer2_vnode_vops;
 349 extern struct vop_ops hammer2_spec_vops;
 350 extern struct vop_ops hammer2_fifo_vops;
 351
 352 extern int hammer2_debug;
 353 extern int hammer2_cluster_enable;
 354 extern int hammer2_hardlink_enable;
 355 extern long hammer2_iod_file_read;
 356 extern long hammer2_iod_meta_read;
 357 extern long hammer2_iod_indr_read;
 358 extern long hammer2_iod_file_write;
 359 extern long hammer2_iod_meta_write;
 360 extern long hammer2_iod_indr_write;
 361 extern long hammer2_iod_volu_write;
 362 extern long hammer2_ioa_file_read;
 363 extern long hammer2_ioa_meta_read;
 364 extern long hammer2_ioa_indr_read;
 365 extern long hammer2_ioa_file_write;
 366 extern long hammer2_ioa_meta_write;
 367 extern long hammer2_ioa_indr_write;
 368 extern long hammer2_ioa_volu_write;
 369
 370 /*
 371  * hammer2_subr.c
 372  */
 373 #define hammer2_icrc32(buf, size)       iscsi_crc32((buf), (size))
 374 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc))
 375
 376 void hammer2_inode_lock_ex(hammer2_inode_t *ip);
 377 void hammer2_inode_unlock_ex(hammer2_inode_t *ip);
 378 void hammer2_inode_lock_sh(hammer2_inode_t *ip);
 379 void hammer2_inode_unlock_sh(hammer2_inode_t *ip);
 380 void hammer2_inode_busy(hammer2_inode_t *ip);
 381 void hammer2_inode_unbusy(hammer2_inode_t *ip);
 382 void hammer2_voldata_lock(hammer2_mount_t *hmp);
 383 void hammer2_voldata_unlock(hammer2_mount_t *hmp);
 384
 385 void hammer2_mount_exlock(hammer2_mount_t *hmp);
 386 void hammer2_mount_shlock(hammer2_mount_t *hmp);
 387 void hammer2_mount_unlock(hammer2_mount_t *hmp);
 388
 389 int hammer2_get_dtype(hammer2_inode_t *ip);
 390 int hammer2_get_vtype(hammer2_inode_t *ip);
 391 u_int8_t hammer2_get_obj_type(enum vtype vtype);
 392 void hammer2_time_to_timespec(u_int64_t xtime, struct timespec *ts);
 393 u_int64_t hammer2_timespec_to_time(struct timespec *ts);
 394 u_int32_t hammer2_to_unix_xid(uuid_t *uuid);
 395 void hammer2_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
 396
 397 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len);
 398 int hammer2_bytes_to_radix(size_t bytes);
 399
 400 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
 401                          hammer2_key_t *lbasep, hammer2_key_t *leofp);
 402 void hammer2_update_time(uint64_t *timep);
 403
 404 /*
 405  * hammer2_inode.c
 406  */
 407 struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp);
 408
 409 void hammer2_inode_lock_nlinks(hammer2_inode_t *ip);
 410 void hammer2_inode_unlock_nlinks(hammer2_inode_t *ip);
 411 hammer2_inode_t *hammer2_inode_alloc(hammer2_pfsmount_t *pmp, void *data);
 412 void hammer2_inode_free(hammer2_inode_t *ip);
 413 void hammer2_inode_ref(hammer2_inode_t *ip);
 414 void hammer2_inode_drop(hammer2_inode_t *ip);
 415 int hammer2_inode_calc_alloc(hammer2_key_t filesize);
 416
 417 int hammer2_inode_create(hammer2_inode_t *dip,
 418                         struct vattr *vap, struct ucred *cred,
 419                         const uint8_t *name, size_t name_len,
 420                         hammer2_inode_t **nipp);
 421
 422 int hammer2_inode_duplicate(hammer2_inode_t *dip,
 423                         hammer2_inode_t *oip, hammer2_inode_t **nipp,
 424                         const uint8_t *name, size_t name_len);
 425 int hammer2_inode_connect(hammer2_inode_t *dip, hammer2_inode_t *oip,
 426                         const uint8_t *name, size_t name_len);
 427 hammer2_inode_t *hammer2_inode_common_parent(hammer2_mount_t *hmp,
 428                         hammer2_inode_t *fdip, hammer2_inode_t *tdip);
 429
 430 int hammer2_unlink_file(hammer2_inode_t *dip,
 431                         const uint8_t *name, size_t name_len,
 432                         int isdir, hammer2_inode_t *retain_ip);
 433 int hammer2_hardlink_consolidate(hammer2_inode_t **ipp, hammer2_inode_t *tdip);
 434 int hammer2_hardlink_deconsolidate(hammer2_inode_t *dip,
 435                         hammer2_chain_t **chainp, hammer2_inode_t **ipp);
 436 int hammer2_hardlink_find(hammer2_inode_t *dip, hammer2_chain_t **chainp,
 437                         hammer2_inode_t **ipp);
 438
 439 /*
 440  * hammer2_chain.c
 441  */
 442 void hammer2_modify_volume(hammer2_mount_t *hmp);
 443 hammer2_chain_t *hammer2_chain_alloc(hammer2_mount_t *hmp,
 444                                 hammer2_blockref_t *bref);
 445 void hammer2_chain_free(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 446 void hammer2_chain_ref(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 447 void hammer2_chain_drop(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 448 int hammer2_chain_lock(hammer2_mount_t *hmp, hammer2_chain_t *chain, int how);
 449 void hammer2_chain_moved(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 450 void hammer2_chain_modify(hammer2_mount_t *hmp, hammer2_chain_t *chain,
 451                                 int flags);
 452 void hammer2_chain_resize(hammer2_inode_t *ip, hammer2_chain_t *chain,
 453                                 int nradix, int flags);
 454 void hammer2_chain_unlock(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 455 void hammer2_chain_wait(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 456 hammer2_chain_t *hammer2_chain_find(hammer2_mount_t *hmp,
 457                                 hammer2_chain_t *parent, int index);
 458 hammer2_chain_t *hammer2_chain_get(hammer2_mount_t *hmp,
 459                                 hammer2_chain_t *parent,
 460                                 int index, int flags);
 461 hammer2_chain_t *hammer2_chain_lookup(hammer2_mount_t *hmp,
 462                                 hammer2_chain_t **parentp,
 463                                 hammer2_key_t key_beg, hammer2_key_t key_end,
 464                                 int flags);
 465 hammer2_chain_t *hammer2_chain_next(hammer2_mount_t *hmp,
 466                                 hammer2_chain_t **parentp,
 467                                 hammer2_chain_t *chain,
 468                                 hammer2_key_t key_beg, hammer2_key_t key_end,
 469                                 int flags);
 470 hammer2_chain_t *hammer2_chain_create(hammer2_mount_t *hmp,
 471                                 hammer2_chain_t *parent,
 472                                 hammer2_chain_t *chain,
 473                                 hammer2_key_t key, int keybits,
 474                                 int type, size_t bytes,
 475                                 int *errorp);
 476 void hammer2_chain_delete(hammer2_mount_t *hmp, hammer2_chain_t *parent,
 477                                 hammer2_chain_t *chain, int retain);
 478 void hammer2_chain_flush(hammer2_mount_t *hmp, hammer2_chain_t *chain,
 479                                 hammer2_tid_t modify_tid);
 480 void hammer2_chain_commit(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 481 void hammer2_chain_parent_setsubmod(hammer2_mount_t *hmp,
 482                                 hammer2_chain_t *chain);
 483
 484 /*
 485  * hammer2_ioctl.c
 486  */
 487 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
 488                                 int fflag, struct ucred *cred);
 489
 490 /*
 491  * hammer2_msgops.c
 492  */
 493 int hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg);
 494 int hammer2_msg_adhoc_input(kdmsg_msg_t *msg);
 495
 496 /*
 497  * hammer2_vfsops.c
 498  */
 499 void hammer2_clusterctl_wakeup(kdmsg_iocom_t *iocom);
 500 void hammer2_volconf_update(hammer2_pfsmount_t *pmp, int index);
 501 void hammer2_cluster_reconnect(hammer2_pfsmount_t *pmp, struct file *fp);
 502
 503 /*
 504  * hammer2_freemap.c
 505  */
 506 hammer2_off_t hammer2_freemap_alloc(hammer2_mount_t *hmp,
 507                                 int type, size_t bytes);
 508 void hammer2_freemap_free(hammer2_mount_t *hmp, hammer2_off_t data_off,
 509                                 int type);
 510
 511 #endif /* !_KERNEL */
 512 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */