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
  67 #include "hammer2_disk.h"
  68 #include "hammer2_mount.h"
  69 #include "hammer2_ioctl.h"
  70 #include "hammer2_ccms.h"
  71 #include "hammer2_network.h"
  72
  73 struct hammer2_chain;
  74 struct hammer2_inode;
  75 struct hammer2_mount;
  76 struct hammer2_pfsmount;
  77 struct hammer2_state;
  78 struct hammer2_msg;
  79
  80 /*
  81  * The chain structure tracks blockref recursions all the way to
  82  * the root volume.  These consist of indirect blocks, inodes,
  83  * and eventually the volume header.
  84  *
  85  * The chain structure is embedded in the hammer2_mount, hammer2_inode,
  86  * and other system memory structures.  The chain structure typically
  87  * implements the reference count and busy flag for the larger structure.
  88  *
  89  * It is always possible to track a chain element all the way back to the
  90  * root by following the (parent) links.  (index) is a type-dependent index
  91  * in the parent indicating where in the parent the chain element resides.
  92  *
  93  * When a blockref is added or deleted the related chain element is marked
  94  * modified and all of its parents are marked SUBMODIFIED (the parent
  95  * recursion can stop once we hit a node that is already marked SUBMODIFIED).
  96  * A deleted chain element must remain intact until synchronized against
  97  * its parent.
  98  *
  99  * The blockref at (parent, index) is not adjusted until the modified chain
 100  * element is flushed and unmarked.  Until then the child's blockref may
 101  * not match the blockref at (parent, index).
 102  */
 103 RB_HEAD(hammer2_chain_tree, hammer2_chain);
 104 RB_HEAD(hammer2_state_tree, hammer2_state);
 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           refs;
 128         u_int           flags;
 129 };
 130
 131 typedef struct hammer2_chain hammer2_chain_t;
 132
 133 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2);
 134 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp);
 135
 136 /*
 137  * MOVED - This bit is set during the flush when the MODIFIED bit is cleared,
 138  *         indicating that the parent's blocktable must inherit a change to
 139  *         the bref (typically a block reallocation)
 140  *
 141  *         It must also be set in situations where a chain is not MODIFIED
 142  *         but whos bref has changed (typically due to fields other than
 143  *         a block reallocation).
 144  */
 145 #define HAMMER2_CHAIN_MODIFIED          0x00000001      /* active mods */
 146 #define HAMMER2_CHAIN_DIRTYEMBED        0x00000002      /* inode embedded */
 147 #define HAMMER2_CHAIN_DIRTYBP           0x00000004      /* dirty on unlock */
 148 #define HAMMER2_CHAIN_SUBMODIFIED       0x00000008      /* 1+ subs modified */
 149 #define HAMMER2_CHAIN_DELETED           0x00000010
 150 #define HAMMER2_CHAIN_INITIAL           0x00000020      /* initial create */
 151 #define HAMMER2_CHAIN_FLUSHED           0x00000040      /* flush on unlock */
 152 #define HAMMER2_CHAIN_MOVED             0x00000080      /* bref changed */
 153 #define HAMMER2_CHAIN_IOFLUSH           0x00000100      /* bawrite on put */
 154 #define HAMMER2_CHAIN_DEFERRED          0x00000200      /* on a deferral list*/
 155 #define HAMMER2_CHAIN_DESTROYED         0x00000400      /* destroying */
 156 #define HAMMER2_CHAIN_MODIFIED_AUX      0x00000800      /* hmp->vchain only */
 157 #define HAMMER2_CHAIN_MODIFY_TID        0x00001000      /* mod updates field */
 158 #define HAMMER2_CHAIN_MOUNTED           0x00002000      /* PFS is mounted */
 159
 160 /*
 161  * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
 162  */
 163 #define HAMMER2_LOOKUP_NOLOCK           0x00000001      /* ref only */
 164 #define HAMMER2_LOOKUP_NODATA           0x00000002      /* data left NULL */
 165 #define HAMMER2_LOOKUP_SHARED           0x00000100
 166
 167 /*
 168  * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
 169  *
 170  * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
 171  *       blocks in the INITIAL-create state.
 172  *
 173  * NOTE: NO_MODIFY_TID tells the function to not set HAMMER2_CHAIN_MODIFY_TID
 174  *       when marking the chain modified (used when a sub-chain modification
 175  *       propagates upward).
 176  */
 177 #define HAMMER2_MODIFY_NOSUB            0x00000001      /* do not set SUBMOD */
 178 #define HAMMER2_MODIFY_OPTDATA          0x00000002      /* data can be NULL */
 179 #define HAMMER2_MODIFY_NO_MODIFY_TID    0x00000004
 180
 181 /*
 182  * Flags passed to hammer2_chain_lock()
 183  */
 184 #define HAMMER2_RESOLVE_NEVER           1
 185 #define HAMMER2_RESOLVE_MAYBE           2
 186 #define HAMMER2_RESOLVE_ALWAYS          3
 187 #define HAMMER2_RESOLVE_MASK            0x0F
 188
 189 #define HAMMER2_RESOLVE_SHARED          0x10
 190
 191 /*
 192  * Cluster different types of storage together for allocations
 193  */
 194 #define HAMMER2_FREECACHE_INODE         0
 195 #define HAMMER2_FREECACHE_INDIR         1
 196 #define HAMMER2_FREECACHE_DATA          2
 197 #define HAMMER2_FREECACHE_UNUSED3       3
 198 #define HAMMER2_FREECACHE_TYPES         4
 199
 200 /*
 201  * BMAP read-ahead maximum parameters
 202  */
 203 #define HAMMER2_BMAP_COUNT              16      /* max bmap read-ahead */
 204 #define HAMMER2_BMAP_BYTES              (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
 205
 206 /*
 207  * Misc
 208  */
 209 #define HAMMER2_FLUSH_DEPTH_LIMIT       40      /* stack recursion limit */
 210
 211 /*
 212  * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
 213  *
 214  * There is an in-memory representation of all on-media data structure.
 215  *
 216  * When accessed read-only the data will be mapped to the related buffer
 217  * cache buffer.
 218  *
 219  * When accessed read-write (marked modified) a kmalloc()'d copy of the
 220  * is created which can then be modified.  The copy is destroyed when a
 221  * filesystem block is allocated to replace it.
 222  *
 223  * Active inodes (those with vnodes attached) will maintain the kmalloc()'d
 224  * copy for both the read-only and the read-write case.  The combination of
 225  * (bp) and (data) determines whether (data) was allocated or not.
 226  *
 227  * The in-memory representation may remain cached (for example in order to
 228  * placemark clustering locks) even after the related data has been
 229  * detached.
 230  */
 231
 232 /*
 233  * A hammer2 inode.
 234  *
 235  * NOTE: The inode's attribute CST which is also used to lock the inode
 236  *       is embedded in the chain (chain.cst) and aliased w/ attr_cst.
 237  */
 238 struct hammer2_inode {
 239         struct hammer2_mount    *hmp;           /* Global mount */
 240         struct hammer2_pfsmount *pmp;           /* PFS mount */
 241         struct hammer2_inode    *pip;           /* parent inode */
 242         struct vnode            *vp;
 243         ccms_cst_t              topo_cst;       /* directory topology cst */
 244         hammer2_chain_t         chain;
 245         struct hammer2_inode_data ip_data;
 246         struct lockf            advlock;
 247         u_int                   depth;          /* directory depth */
 248         hammer2_off_t           delta_dcount;   /* adjust data_count */
 249         hammer2_off_t           delta_icount;   /* adjust inode_count */
 250 };
 251
 252 typedef struct hammer2_inode hammer2_inode_t;
 253
 254 /*
 255  * A hammer2 indirect block
 256  */
 257 struct hammer2_indblock {
 258         hammer2_chain_t         chain;
 259 };
 260
 261 typedef struct hammer2_indblock hammer2_indblock_t;
 262
 263 /*
 264  * A hammer2 data block
 265  */
 266 struct hammer2_data {
 267         hammer2_chain_t         chain;
 268 };
 269
 270 typedef struct hammer2_data hammer2_data_t;
 271
 272 struct hammer2_freecache {
 273         hammer2_off_t   bulk;
 274         hammer2_off_t   single;
 275 };
 276
 277 typedef struct hammer2_freecache hammer2_freecache_t;
 278
 279 /*
 280  * Global (per device) mount structure for device (aka vp->v_mount->hmp)
 281  */
 282 struct hammer2_mount {
 283         struct vnode    *devvp;         /* device vnode */
 284         int             ronly;          /* read-only mount */
 285         int             pmp_count;      /* PFS mounts backed by us */
 286         TAILQ_ENTRY(hammer2_mount) mntentry; /* hammer2_mntlist */
 287
 288         struct malloc_type *minode;
 289         int             ninodes;
 290         int             maxinodes;
 291
 292         struct malloc_type *mchain;
 293         int             nipstacks;
 294         int             maxipstacks;
 295         hammer2_chain_t vchain;         /* anchor chain */
 296         hammer2_chain_t *schain;        /* super-root */
 297         struct lock     alloclk;        /* lockmgr lock */
 298         struct lock     voldatalk;      /* lockmgr lock */
 299
 300         hammer2_volume_data_t voldata;
 301         hammer2_freecache_t freecache[HAMMER2_FREECACHE_TYPES]
 302                                      [HAMMER2_MAX_RADIX+1];
 303 };
 304
 305 typedef struct hammer2_mount hammer2_mount_t;
 306
 307 /*
 308  * Per-PFS mount structure for device (aka vp->v_mount)
 309  */
 310 struct hammer2_pfsmount {
 311         struct mount            *mp;            /* kernel mount */
 312         struct hammer2_mount    *hmp;           /* device global mount */
 313         hammer2_chain_t         *rchain;        /* PFS root chain */
 314         hammer2_inode_t         *iroot;         /* PFS root inode */
 315         struct malloc_type      *mmsg;
 316         ccms_domain_t           ccms_dom;
 317         struct netexport        export;         /* nfs export */
 318         int                     ronly;          /* read-only mount */
 319         struct file             *msg_fp;        /* cluster pipe->userland */
 320         thread_t                msgrd_td;       /* cluster thread */
 321         thread_t                msgwr_td;       /* cluster thread */
 322         int                     msg_ctl;        /* wakeup flags */
 323         uint32_t                msgid_iterator;
 324         struct lock             msglk;          /* lockmgr lock */
 325         TAILQ_HEAD(, hammer2_msg) msgq;         /* transmit queue */
 326         struct hammer2_state    *freerd_state;  /* allocation cache */
 327         struct hammer2_state    *freewr_state;  /* allocation cache */
 328         struct hammer2_state_tree staterd_tree; /* active messages */
 329         struct hammer2_state_tree statewr_tree; /* active messages */
 330 };
 331
 332 typedef struct hammer2_pfsmount hammer2_pfsmount_t;
 333
 334 #define HAMMER2_CLUSTERCTL_KILL 0x0001
 335
 336 /*
 337  * In-memory message structure for hammer2.
 338  *
 339  * Persistent cache state messages will be associated with a hammer2_chain.
 340  *
 341  * NOTE!  If REPLY is set then the source and target fields in the message
 342  *        are swapped.  That is, source and target remain unchanged whether
 343  *        the message is a command from side A or a reply from side B.
 344  *        The message is routed based on target if REPLY is not set, and on
 345  *        source if REPLY is set.
 346  */
 347 struct hammer2_state {
 348         RB_ENTRY(hammer2_state) rbnode;         /* indexed by msgid */
 349         struct hammer2_pfsmount *pmp;
 350         uint32_t        txcmd;                  /* mostly for CMDF flags */
 351         uint32_t        rxcmd;                  /* mostly for CMDF flags */
 352         uint16_t        source;                 /* command originator */
 353         uint16_t        target;                 /* reply originator */
 354         uint32_t        msgid;                  /* {source,target,msgid} uniq */
 355         int             flags;
 356         int             error;
 357         struct hammer2_chain *chain;            /* msg associated w/chain */
 358         struct hammer2_msg *msg;
 359         int (*func)(struct hammer2_pfsmount *, struct hammer2_msg *);
 360 };
 361
 362 #define HAMMER2_STATE_INSERTED  0x0001
 363 #define HAMMER2_STATE_DYNAMIC   0x0002
 364
 365 struct hammer2_msg {
 366         TAILQ_ENTRY(hammer2_msg) qentry;        /* serialized queue */
 367         struct hammer2_state *state;
 368         size_t          hdr_size;
 369         size_t          aux_size;
 370         char            *aux_data;
 371         hammer2_msg_any_t any;
 372 };
 373
 374 typedef struct hammer2_state hammer2_state_t;
 375 typedef struct hammer2_msg hammer2_msg_t;
 376
 377 int hammer2_state_cmp(hammer2_state_t *state1, hammer2_state_t *state2);
 378 RB_PROTOTYPE(hammer2_state_tree, hammer2_state, rbnode, hammer2_state_cmp);
 379
 380
 381 #if defined(_KERNEL)
 382
 383 MALLOC_DECLARE(M_HAMMER2);
 384
 385 #define VTOI(vp)        ((hammer2_inode_t *)(vp)->v_data)
 386 #define ITOV(ip)        ((ip)->vp)
 387
 388 static __inline
 389 hammer2_pfsmount_t *
 390 MPTOPMP(struct mount *mp)
 391 {
 392         return ((hammer2_pfsmount_t *)mp->mnt_data);
 393 }
 394
 395 static __inline
 396 hammer2_mount_t *
 397 MPTOHMP(struct mount *mp)
 398 {
 399         return (((hammer2_pfsmount_t *)mp->mnt_data)->hmp);
 400 }
 401
 402 extern struct vop_ops hammer2_vnode_vops;
 403 extern struct vop_ops hammer2_spec_vops;
 404 extern struct vop_ops hammer2_fifo_vops;
 405
 406 extern int hammer2_debug;
 407 extern int hammer2_cluster_enable;
 408 extern int hammer2_hardlink_enable;
 409 extern long hammer2_iod_file_read;
 410 extern long hammer2_iod_meta_read;
 411 extern long hammer2_iod_indr_read;
 412 extern long hammer2_iod_file_write;
 413 extern long hammer2_iod_meta_write;
 414 extern long hammer2_iod_indr_write;
 415 extern long hammer2_iod_volu_write;
 416 extern long hammer2_ioa_file_read;
 417 extern long hammer2_ioa_meta_read;
 418 extern long hammer2_ioa_indr_read;
 419 extern long hammer2_ioa_file_write;
 420 extern long hammer2_ioa_meta_write;
 421 extern long hammer2_ioa_indr_write;
 422 extern long hammer2_ioa_volu_write;
 423
 424 /*
 425  * hammer2_subr.c
 426  */
 427 void hammer2_inode_lock_ex(hammer2_inode_t *ip);
 428 void hammer2_inode_unlock_ex(hammer2_inode_t *ip);
 429 void hammer2_inode_lock_sh(hammer2_inode_t *ip);
 430 void hammer2_inode_unlock_sh(hammer2_inode_t *ip);
 431 void hammer2_inode_busy(hammer2_inode_t *ip);
 432 void hammer2_inode_unbusy(hammer2_inode_t *ip);
 433 void hammer2_voldata_lock(hammer2_mount_t *hmp);
 434 void hammer2_voldata_unlock(hammer2_mount_t *hmp);
 435
 436 void hammer2_mount_exlock(hammer2_mount_t *hmp);
 437 void hammer2_mount_shlock(hammer2_mount_t *hmp);
 438 void hammer2_mount_unlock(hammer2_mount_t *hmp);
 439
 440 int hammer2_get_dtype(hammer2_inode_t *ip);
 441 int hammer2_get_vtype(hammer2_inode_t *ip);
 442 u_int8_t hammer2_get_obj_type(enum vtype vtype);
 443 void hammer2_time_to_timespec(u_int64_t xtime, struct timespec *ts);
 444 u_int64_t hammer2_timespec_to_time(struct timespec *ts);
 445 u_int32_t hammer2_to_unix_xid(uuid_t *uuid);
 446 void hammer2_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
 447
 448 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len);
 449 int hammer2_bytes_to_radix(size_t bytes);
 450
 451 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
 452                          hammer2_key_t *lbasep, hammer2_key_t *leofp);
 453 void hammer2_update_time(uint64_t *timep);
 454
 455 /*
 456  * hammer2_inode.c
 457  */
 458 struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp);
 459
 460 void hammer2_inode_lock_nlinks(hammer2_inode_t *ip);
 461 void hammer2_inode_unlock_nlinks(hammer2_inode_t *ip);
 462 hammer2_inode_t *hammer2_inode_alloc(hammer2_pfsmount_t *pmp, void *data);
 463 void hammer2_inode_free(hammer2_inode_t *ip);
 464 void hammer2_inode_ref(hammer2_inode_t *ip);
 465 void hammer2_inode_drop(hammer2_inode_t *ip);
 466 int hammer2_inode_calc_alloc(hammer2_key_t filesize);
 467
 468 int hammer2_inode_create(hammer2_inode_t *dip,
 469                         struct vattr *vap, struct ucred *cred,
 470                         const uint8_t *name, size_t name_len,
 471                         hammer2_inode_t **nipp);
 472
 473 int hammer2_inode_duplicate(hammer2_inode_t *dip,
 474                         hammer2_inode_t *oip, hammer2_inode_t **nipp,
 475                         const uint8_t *name, size_t name_len);
 476 int hammer2_inode_connect(hammer2_inode_t *dip, hammer2_inode_t *oip,
 477                         const uint8_t *name, size_t name_len);
 478
 479 int hammer2_unlink_file(hammer2_inode_t *dip,
 480                         const uint8_t *name, size_t name_len,
 481                         int isdir, hammer2_inode_t *retain_ip);
 482 int hammer2_hardlink_consolidate(hammer2_inode_t **ipp, hammer2_inode_t *tdip);
 483 int hammer2_hardlink_deconsolidate(hammer2_inode_t *dip,
 484                         hammer2_chain_t **chainp, hammer2_inode_t **ipp);
 485 int hammer2_hardlink_find(hammer2_inode_t *dip, hammer2_chain_t **chainp,
 486                         hammer2_inode_t **ipp);
 487
 488 /*
 489  * hammer2_chain.c
 490  */
 491 void hammer2_modify_volume(hammer2_mount_t *hmp);
 492 hammer2_chain_t *hammer2_chain_alloc(hammer2_mount_t *hmp,
 493                                 hammer2_blockref_t *bref);
 494 void hammer2_chain_free(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 495 void hammer2_chain_ref(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 496 void hammer2_chain_drop(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 497 int hammer2_chain_lock(hammer2_mount_t *hmp, hammer2_chain_t *chain, int how);
 498 void hammer2_chain_moved(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 499 void hammer2_chain_modify(hammer2_mount_t *hmp, hammer2_chain_t *chain,
 500                                 int flags);
 501 void hammer2_chain_resize(hammer2_inode_t *ip, hammer2_chain_t *chain,
 502                                 int nradix, int flags);
 503 void hammer2_chain_unlock(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 504 hammer2_chain_t *hammer2_chain_find(hammer2_mount_t *hmp,
 505                                 hammer2_chain_t *parent, int index);
 506 hammer2_chain_t *hammer2_chain_get(hammer2_mount_t *hmp,
 507                                 hammer2_chain_t *parent,
 508                                 int index, int flags);
 509 hammer2_chain_t *hammer2_chain_lookup(hammer2_mount_t *hmp,
 510                                 hammer2_chain_t **parentp,
 511                                 hammer2_key_t key_beg, hammer2_key_t key_end,
 512                                 int flags);
 513 hammer2_chain_t *hammer2_chain_next(hammer2_mount_t *hmp,
 514                                 hammer2_chain_t **parentp,
 515                                 hammer2_chain_t *chain,
 516                                 hammer2_key_t key_beg, hammer2_key_t key_end,
 517                                 int flags);
 518 hammer2_chain_t *hammer2_chain_create(hammer2_mount_t *hmp,
 519                                 hammer2_chain_t *parent,
 520                                 hammer2_chain_t *chain,
 521                                 hammer2_key_t key, int keybits,
 522                                 int type, size_t bytes);
 523 void hammer2_chain_delete(hammer2_mount_t *hmp, hammer2_chain_t *parent,
 524                                 hammer2_chain_t *chain, int retain);
 525 void hammer2_chain_flush(hammer2_mount_t *hmp, hammer2_chain_t *chain,
 526                                 hammer2_tid_t modify_tid);
 527 void hammer2_chain_commit(hammer2_mount_t *hmp, hammer2_chain_t *chain);
 528
 529 /*
 530  * hammer2_ioctl.c
 531  */
 532 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
 533                                 int fflag, struct ucred *cred);
 534
 535 /*
 536  * hammer2_msg.c
 537  */
 538 int hammer2_state_msgrx(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
 539 int hammer2_state_msgtx(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
 540 void hammer2_state_cleanuprx(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
 541 void hammer2_state_cleanuptx(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
 542 int hammer2_msg_execute(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
 543 void hammer2_state_free(hammer2_state_t *state);
 544 void hammer2_msg_free(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
 545 hammer2_msg_t *hammer2_msg_alloc(hammer2_pfsmount_t *pmp,
 546                                 uint16_t source, uint16_t target,
 547                                 uint32_t cmd);
 548 hammer2_state_t *hammer2_msg_write(hammer2_pfsmount_t *pmp,
 549                                 hammer2_msg_t *msg,
 550                                 int (*func)(hammer2_pfsmount_t *,
 551                                             hammer2_msg_t *));
 552
 553 /*
 554  * hammer2_msgops.c
 555  */
 556 int hammer2_msg_adhoc_input(hammer2_pfsmount_t *pmp, hammer2_msg_t *msg);
 557
 558 /*
 559  * hammer2_freemap.c
 560  */
 561 hammer2_off_t hammer2_freemap_alloc(hammer2_mount_t *hmp,
 562                                 int type, size_t bytes);
 563 void hammer2_freemap_free(hammer2_mount_t *hmp, hammer2_off_t data_off,
 564                                 int type);
 565
 566 #endif /* !_KERNEL */
 567 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */