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 RB_HEAD(hammer2_state_tree, hammer2_state);
 106 TAILQ_HEAD(flush_deferral_list, hammer2_chain);
 107
 108 struct hammer2_chain {
 109         ccms_cst_t      cst;                    /* attr or data cst */
 110         struct hammer2_blockref bref;
 111         struct hammer2_blockref bref_flush;     /* synchronized w/MOVED bit */
 112         struct hammer2_chain    *parent;        /* return chain to root */
 113         struct hammer2_chain_tree rbhead;
 114         struct hammer2_state    *state;         /* if active cache msg */
 115         RB_ENTRY(hammer2_chain) rbnode;
 116         TAILQ_ENTRY(hammer2_chain) flush_node;  /* flush deferral list */
 117         union {
 118                 struct hammer2_inode *ip;
 119                 struct hammer2_indblock *np;
 120                 struct hammer2_data *dp;
 121                 void *mem;
 122         } u;
 123
 124         struct buf      *bp;            /* buffer cache (ro) */
 125         hammer2_media_data_t *data;     /* modified copy of data (rw) */
 126         u_int           bytes;          /* physical size of data */
 127         int             index;          /* index in parent */
 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
 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 */
 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
 161 /*
 162  * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
 163  */
 164 #define HAMMER2_LOOKUP_NOLOCK           0x00000001      /* ref only */
 165 #define HAMMER2_LOOKUP_NODATA           0x00000002      /* data left NULL */
 166 #define HAMMER2_LOOKUP_SHARED           0x00000100
 167
 168 /*
 169  * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
 170  *
 171  * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
 172  *       blocks in the INITIAL-create state.
 173  *
 174  * NOTE: NO_MODIFY_TID tells the function to not set HAMMER2_CHAIN_MODIFY_TID
 175  *       when marking the chain modified (used when a sub-chain modification
 176  *       propagates upward).
 177  */
 178 #define HAMMER2_MODIFY_NOSUB            0x00000001      /* do not set SUBMOD */
 179 #define HAMMER2_MODIFY_OPTDATA          0x00000002      /* data can be NULL */
 180 #define HAMMER2_MODIFY_NO_MODIFY_TID    0x00000004
 181
 182 /*
 183  * Flags passed to hammer2_chain_lock()
 184  */
 185 #define HAMMER2_RESOLVE_NEVER           1
 186 #define HAMMER2_RESOLVE_MAYBE           2
 187 #define HAMMER2_RESOLVE_ALWAYS          3
 188 #define HAMMER2_RESOLVE_MASK            0x0F
 189
 190 #define HAMMER2_RESOLVE_SHARED          0x10
 191
 192 /*
 193  * Cluster different types of storage together for allocations
 194  */
 195 #define HAMMER2_FREECACHE_INODE         0
 196 #define HAMMER2_FREECACHE_INDIR         1
 197 #define HAMMER2_FREECACHE_DATA          2
 198 #define HAMMER2_FREECACHE_UNUSED3       3
 199 #define HAMMER2_FREECACHE_TYPES         4
 200
 201 /*
 202  * BMAP read-ahead maximum parameters
 203  */
 204 #define HAMMER2_BMAP_COUNT              16      /* max bmap read-ahead */
 205 #define HAMMER2_BMAP_BYTES              (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
 206
 207 /*
 208  * Misc
 209  */
 210 #define HAMMER2_FLUSH_DEPTH_LIMIT       40      /* stack recursion limit */
 211
 212 /*
 213  * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
 214  *
 215  * There is an in-memory representation of all on-media data structure.
 216  *
 217  * When accessed read-only the data will be mapped to the related buffer
 218  * cache buffer.
 219  *
 220  * When accessed read-write (marked modified) a kmalloc()'d copy of the
 221  * is created which can then be modified.  The copy is destroyed when a
 222  * filesystem block is allocated to replace it.
 223  *
 224  * Active inodes (those with vnodes attached) will maintain the kmalloc()'d
 225  * copy for both the read-only and the read-write case.  The combination of
 226  * (bp) and (data) determines whether (data) was allocated or not.
 227  *
 228  * The in-memory representation may remain cached (for example in order to
 229  * placemark clustering locks) even after the related data has been
 230  * detached.
 231  */
 232
 233 /*
 234  * A hammer2 inode.
 235  *
 236  * NOTE: The inode's attribute CST which is also used to lock the inode
 237  *       is embedded in the chain (chain.cst) and aliased w/ attr_cst.
 238  */
 239 struct hammer2_inode {
 240         struct hammer2_mount    *hmp;           /* Global mount */
 241         struct hammer2_pfsmount *pmp;           /* PFS mount */
 242         struct hammer2_inode    *pip;           /* parent inode */
 243         struct vnode            *vp;
 244         ccms_cst_t              topo_cst;       /* directory topology cst */
 245         hammer2_chain_t         chain;
 246         struct hammer2_inode_data ip_data;
 247         struct lockf            advlock;
 248         u_int                   depth;          /* directory depth */
 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  * Structure used to represent a virtual circuit for a messaging
 282  * route.  Typically associated from hammer2_state but the hammer2_pfsmount
 283  * structure also has one to represent the point-to-point link.
 284  */
 285 struct hammer2_router {
 286         struct hammer2_pfsmount *pmp;
 287         struct hammer2_state    *state;         /* received LNK_SPAN state */
 288         uint64_t                target;         /* target */
 289 };
 290
 291 typedef struct hammer2_router hammer2_router_t;
 292
 293 /*
 294  * Global (per device) mount structure for device (aka vp->v_mount->hmp)
 295  */
 296 struct hammer2_mount {
 297         struct vnode    *devvp;         /* device vnode */
 298         int             ronly;          /* read-only mount */
 299         int             pmp_count;      /* PFS mounts backed by us */
 300         TAILQ_ENTRY(hammer2_mount) mntentry; /* hammer2_mntlist */
 301
 302         struct malloc_type *minode;
 303         int             ninodes;
 304         int             maxinodes;
 305
 306         struct malloc_type *mchain;
 307         int             nipstacks;
 308         int             maxipstacks;
 309         hammer2_chain_t vchain;         /* anchor chain */
 310         hammer2_chain_t *schain;        /* super-root */
 311         struct lock     alloclk;        /* lockmgr lock */
 312         struct lock     voldatalk;      /* lockmgr lock */
 313
 314         hammer2_volume_data_t voldata;
 315         hammer2_freecache_t freecache[HAMMER2_FREECACHE_TYPES]
 316                                      [HAMMER2_MAX_RADIX+1];
 317 };
 318
 319 typedef struct hammer2_mount hammer2_mount_t;
 320
 321 /*
 322  * Per-PFS mount structure for device (aka vp->v_mount)
 323  */
 324 struct hammer2_pfsmount {
 325         struct mount            *mp;            /* kernel mount */
 326         struct hammer2_mount    *hmp;           /* device global mount */
 327         hammer2_chain_t         *rchain;        /* PFS root chain */
 328         hammer2_inode_t         *iroot;         /* PFS root inode */
 329         struct malloc_type      *mmsg;
 330         ccms_domain_t           ccms_dom;
 331         struct netexport        export;         /* nfs export */
 332         int                     ronly;          /* read-only mount */
 333         struct file             *msg_fp;        /* cluster pipe->userland */
 334         thread_t                msgrd_td;       /* cluster thread */
 335         thread_t                msgwr_td;       /* cluster thread */
 336         int                     msg_ctl;        /* wakeup flags */
 337         int                     msg_seq;        /* cluster msg sequence id */
 338         uint32_t                reserved01;
 339         struct lock             msglk;          /* lockmgr lock */
 340         TAILQ_HEAD(, hammer2_msg) msgq;         /* transmit queue */
 341         struct hammer2_state    *conn_state;    /* active LNK_CONN state */
 342         struct hammer2_state    *freerd_state;  /* allocation cache */
 343         struct hammer2_state    *freewr_state;  /* allocation cache */
 344         struct hammer2_state_tree staterd_tree; /* active messages */
 345         struct hammer2_state_tree statewr_tree; /* active messages */
 346         struct hammer2_router   router;
 347 };
 348
 349 typedef struct hammer2_pfsmount hammer2_pfsmount_t;
 350
 351 /*
 352  * msg_ctl flags (atomic)
 353  */
 354 #define HAMMER2_CLUSTERCTL_KILL         0x00000001
 355 #define HAMMER2_CLUSTERCTL_KILLRX       0x00000002 /* staged helper exit */
 356 #define HAMMER2_CLUSTERCTL_KILLTX       0x00000004 /* staged helper exit */
 357 #define HAMMER2_CLUSTERCTL_SLEEPING     0x00000008 /* interlocked w/msglk */
 358
 359 /*
 360  * Transactional state structure, representing an open transaction.  The
 361  * transaction might represent a cache state (and thus have a chain
 362  * association), or a VOP op, LNK_SPAN, or other things.
 363  */
 364 struct hammer2_state {
 365         RB_ENTRY(hammer2_state) rbnode;         /* indexed by msgid */
 366         struct hammer2_pfsmount *pmp;
 367         struct hammer2_router *router;          /* related LNK_SPAN route */
 368         uint32_t        txcmd;                  /* mostly for CMDF flags */
 369         uint32_t        rxcmd;                  /* mostly for CMDF flags */
 370         uint64_t        msgid;                  /* {spanid,msgid} uniq */
 371         int             flags;
 372         int             error;
 373         struct hammer2_chain *chain;            /* msg associated w/chain */
 374         struct hammer2_msg *msg;
 375         int (*func)(struct hammer2_state *, struct hammer2_msg *);
 376         union {
 377                 void *any;
 378                 hammer2_pfsmount_t *pmp;
 379         } any;
 380 };
 381
 382 #define HAMMER2_STATE_INSERTED  0x0001
 383 #define HAMMER2_STATE_DYNAMIC   0x0002
 384 #define HAMMER2_STATE_DELPEND   0x0004          /* transmit delete pending */
 385
 386 struct hammer2_msg {
 387         TAILQ_ENTRY(hammer2_msg) qentry;        /* serialized queue */
 388         struct hammer2_router *router;
 389         struct hammer2_state *state;
 390         size_t          hdr_size;
 391         size_t          aux_size;
 392         char            *aux_data;
 393         dmsg_any_t      any;
 394 };
 395
 396 typedef struct hammer2_link hammer2_link_t;
 397 typedef struct hammer2_state hammer2_state_t;
 398 typedef struct hammer2_msg hammer2_msg_t;
 399
 400 int hammer2_state_cmp(hammer2_state_t *state1, hammer2_state_t *state2);
 401 RB_PROTOTYPE(hammer2_state_tree, hammer2_state, rbnode, hammer2_state_cmp);
 402
 403
 404 #if defined(_KERNEL)
 405
 406 MALLOC_DECLARE(M_HAMMER2);
 407
 408 #define VTOI(vp)        ((hammer2_inode_t *)(vp)->v_data)
 409 #define ITOV(ip)        ((ip)->vp)
 410
 411 static __inline
 412 hammer2_pfsmount_t *
 413 MPTOPMP(struct mount *mp)
 414 {
 415         return ((hammer2_pfsmount_t *)mp->mnt_data);
 416 }
 417
 418 static __inline
 419 hammer2_mount_t *
 420 MPTOHMP(struct mount *mp)
 421 {
 422         return (((hammer2_pfsmount_t *)mp->mnt_data)->hmp);
 423 }
 424
 425 extern struct vop_ops hammer2_vnode_vops;
 426 extern struct vop_ops hammer2_spec_vops;
 427 extern struct vop_ops hammer2_fifo_vops;
 428
 429 extern int hammer2_debug;
 430 extern int hammer2_cluster_enable;
 431 extern int hammer2_hardlink_enable;
 432 extern long hammer2_iod_file_read;
 433 extern long hammer2_iod_meta_read;
 434 extern long hammer2_iod_indr_read;
 435 extern long hammer2_iod_file_write;
 436 extern long hammer2_iod_meta_write;
 437 extern long hammer2_iod_indr_write;
 438 extern long hammer2_iod_volu_write;
 439 extern long hammer2_ioa_file_read;
 440 extern long hammer2_ioa_meta_read;
 441 extern long hammer2_ioa_indr_read;
 442 extern long hammer2_ioa_file_write;
 443 extern long hammer2_ioa_meta_write;
 444 extern long hammer2_ioa_indr_write;
 445 extern long hammer2_ioa_volu_write;
 446
 447 /*
 448  * hammer2_subr.c
 449  */
 450 void hammer2_inode_lock_ex(hammer2_inode_t *ip);
 451 void hammer2_inode_unlock_ex(hammer2_inode_t *ip);
 452 void hammer2_inode_lock_sh(hammer2_inode_t *ip);
 453 void hammer2_inode_unlock_sh(hammer2_inode_t *ip);
 454 void hammer2_inode_busy(hammer2_inode_t *ip);
 455 void hammer2_inode_unbusy(hammer2_inode_t *ip);
 456 void hammer2_voldata_lock(hammer2_mount_t *hmp);
 457 void hammer2_voldata_unlock(hammer2_mount_t *hmp);
 458
 459 void hammer2_mount_exlock(hammer2_mount_t *hmp);
 460 void hammer2_mount_shlock(hammer2_mount_t *hmp);
 461 void hammer2_mount_unlock(hammer2_mount_t *hmp);
 462
 463 int hammer2_get_dtype(hammer2_inode_t *ip);
 464 int hammer2_get_vtype(hammer2_inode_t *ip);
 465 u_int8_t hammer2_get_obj_type(enum vtype vtype);
 466 void hammer2_time_to_timespec(u_int64_t xtime, struct timespec *ts);
 467 u_int64_t hammer2_timespec_to_time(struct timespec *ts);
 468 u_int32_t hammer2_to_unix_xid(uuid_t *uuid);
 469 void hammer2_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
 470
 471 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len);
 472 int hammer2_bytes_to_radix(size_t bytes);
 473
 474 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
 475                          hammer2_key_t *lbasep, hammer2_key_t *leofp);
 476 void hammer2_update_time(uint64_t *timep);
 477
 478 /*
 479  * hammer2_inode.c
 480  */
 481 struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp);
 482
 483 void hammer2_inode_lock_nlinks(hammer2_inode_t *ip);
 484 void hammer2_inode_unlock_nlinks(hammer2_inode_t *ip);
 485 hammer2_inode_t *hammer2_inode_alloc(hammer2_pfsmount_t *pmp, void *data);
 486 void hammer2_inode_free(hammer2_inode_t *ip);
 487 void hammer2_inode_ref(hammer2_inode_t *ip);
 488 void hammer2_inode_drop(hammer2_inode_t *ip);
 489 int hammer2_inode_calc_alloc(hammer2_key_t filesize);
 490
 491 int hammer2_inode_create(hammer2_inode_t *dip,
 492                         struct vattr *vap, struct ucred *cred,
 493                         const uint8_t *name, size_t name_len,
 494                         hammer2_inode_t **nipp);
 495
 496 int hammer2_inode_duplicate(hammer2_inode_t *dip,
 497                         hammer2_inode_t *oip, hammer2_inode_t **nipp,
 498                         const uint8_t *name, size_t name_len);
 499 int hammer2_inode_connect(hammer2_inode_t *dip, hammer2_inode_t *oip,
 500                         const uint8_t *name, size_t name_len);
 501
 502 int hammer2_unlink_file(hammer2_inode_t *dip,
 503                         const uint8_t *name, size_t name_len,
 504                         int isdir, hammer2_inode_t *retain_ip);
 505 int hammer2_hardlink_consolidate(hammer2_inode_t **ipp, hammer2_inode_t *tdip);
 506 int hammer2_hardlink_deconsolidate(hammer2_inode_t *dip,
 507                         hammer2_chain_t **chainp, hammer2_inode_t **ipp);
 508 int hammer2_hardlink_find(hammer2_inode_t *dip, hammer2_chain_t **chainp,
 509                         hammer2_inode_t **ipp);
 510
 511 /*
 512  * hammer2_chain.c
 513  */
 514 void hammer2_modify_volume(hammer2_mount_t *hmp);
 515 hammer2_chain_t *hammer2_chain_alloc(hammer2_mount_t *hmp,
 516                                 hammer2_blockref_t *bref);
 517 void hammer2_chain_free(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 518 void hammer2_chain_ref(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 519 void hammer2_chain_drop(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 520 int hammer2_chain_lock(hammer2_mount_t *hmp, hammer2_chain_t *chain, int how);
 521 void hammer2_chain_moved(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 522 void hammer2_chain_modify(hammer2_mount_t *hmp, hammer2_chain_t *chain,
 523                                 int flags);
 524 void hammer2_chain_resize(hammer2_inode_t *ip, hammer2_chain_t *chain,
 525                                 int nradix, int flags);
 526 void hammer2_chain_unlock(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 527 hammer2_chain_t *hammer2_chain_find(hammer2_mount_t *hmp,
 528                                 hammer2_chain_t *parent, int index);
 529 hammer2_chain_t *hammer2_chain_get(hammer2_mount_t *hmp,
 530                                 hammer2_chain_t *parent,
 531                                 int index, int flags);
 532 hammer2_chain_t *hammer2_chain_lookup(hammer2_mount_t *hmp,
 533                                 hammer2_chain_t **parentp,
 534                                 hammer2_key_t key_beg, hammer2_key_t key_end,
 535                                 int flags);
 536 hammer2_chain_t *hammer2_chain_next(hammer2_mount_t *hmp,
 537                                 hammer2_chain_t **parentp,
 538                                 hammer2_chain_t *chain,
 539                                 hammer2_key_t key_beg, hammer2_key_t key_end,
 540                                 int flags);
 541 hammer2_chain_t *hammer2_chain_create(hammer2_mount_t *hmp,
 542                                 hammer2_chain_t *parent,
 543                                 hammer2_chain_t *chain,
 544                                 hammer2_key_t key, int keybits,
 545                                 int type, size_t bytes);
 546 void hammer2_chain_delete(hammer2_mount_t *hmp, hammer2_chain_t *parent,
 547                                 hammer2_chain_t *chain, int retain);
 548 void hammer2_chain_flush(hammer2_mount_t *hmp, hammer2_chain_t *chain,
 549                                 hammer2_tid_t modify_tid);
 550 void hammer2_chain_commit(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 551
 552 /*
 553  * hammer2_ioctl.c
 554  */
 555 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
 556                                 int fflag, struct ucred *cred);
 557
 558 /*
 559  * hammer2_msg.c
 560  */
 561 int hammer2_state_msgrx(hammer2_msg_t *msg);
 562 int hammer2_state_msgtx(hammer2_msg_t *msg);
 563 void hammer2_state_cleanuprx(hammer2_msg_t *msg);
 564 void hammer2_state_cleanuptx(hammer2_msg_t *msg);
 565 int hammer2_msg_execute(hammer2_msg_t *msg);
 566 void hammer2_state_free(hammer2_state_t *state);
 567 void hammer2_msg_free(hammer2_msg_t *msg);
 568 hammer2_msg_t *hammer2_msg_alloc(hammer2_router_t *router, uint32_t cmd,
 569                                 int (*func)(hammer2_state_t *, hammer2_msg_t *),
 570                                 void *data);
 571 void hammer2_msg_write(hammer2_msg_t *msg);
 572 void hammer2_msg_reply(hammer2_msg_t *msg, uint32_t error);
 573 void hammer2_msg_result(hammer2_msg_t *msg, uint32_t error);
 574
 575 /*
 576  * hammer2_msgops.c
 577  */
 578 int hammer2_msg_dbg_rcvmsg(hammer2_msg_t *msg);
 579 int hammer2_msg_adhoc_input(hammer2_msg_t *msg);
 580
 581 /*
 582  * hammer2_vfsops.c
 583  */
 584 void hammer2_clusterctl_wakeup(hammer2_pfsmount_t *pmp);
 585 void hammer2_volconf_update(hammer2_pfsmount_t *pmp, int index);
 586 void hammer2_cluster_reconnect(hammer2_pfsmount_t *pmp, struct file *fp);
 587
 588 /*
 589  * hammer2_freemap.c
 590  */
 591 hammer2_off_t hammer2_freemap_alloc(hammer2_mount_t *hmp,
 592                                 int type, size_t bytes);
 593 void hammer2_freemap_free(hammer2_mount_t *hmp, hammer2_off_t data_off,
 594                                 int type);
 595
 596 #endif /* !_KERNEL */
 597 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */