sys/vfs/hammer2/hammer2.h

   1 /*
   2  * Copyright (c) 2011-2013 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 the root
  83  * volume.  These consist of indirect blocks, inodes, and eventually the
  84  * volume header itself.
  85  *
  86  * In situations where a duplicate is needed to represent different snapshots
  87  * or flush points a new chain will be allocated but associated with the
  88  * same shared chain_core.  The RBTREE is contained in the shared chain_core
  89  * and entries in the RBTREE are versioned.
  90  *
  91  * Duplication can occur whenever a chain must be modified.  Note that
  92  * a deletion is not considered a modification.
  93  *
  94  *      (a) General modifications at data leafs
  95  *      (b) When a chain is resized
  96  *      (c) When a chain's blockref array is updated
  97  *      (d) When a chain is renamed
  98  *      (e) When a chain is moved (when an indirect block is split)
  99  *
 100  * Advantages:
 101  *
 102  *      (1) Fully coherent snapshots can be taken without requiring
 103  *          a pre-flush, resulting in extremely fast (sub-millisecond)
 104  *          snapshots.
 105  *
 106  *      (2) Multiple synchronization points can be in-flight at the same
 107  *          time, representing multiple snapshots or flushes.
 108  *
 109  *      (3) The algorithms needed to keep track of everything are actually
 110  *          not that complex.
 111  *
 112  * Special Considerations:
 113  *
 114  *      A chain is ref-counted on a per-chain basis, but the chain's lock
 115  *      is associated with the shared chain_core and is not per-chain.
 116  *
 117  *      Each chain is representative of a filesystem topology.  Even
 118  *      though the shared chain_core's are effectively multi-homed, the
 119  *      chain structure is not.
 120  *
 121  *      chain->parent is a stable pointer and can be iterated without locking
 122  *      as long as either the chain or *any* deep child under the chain
 123  *      is held.
 124  */
 125 RB_HEAD(hammer2_chain_tree, hammer2_chain);
 126 TAILQ_HEAD(flush_deferral_list, hammer2_chain);
 127
 128 struct hammer2_chain_core {
 129         struct ccms_cst cst;
 130         struct hammer2_chain_tree rbtree;
 131         struct hammer2_chain    *first_parent;
 132         u_int           sharecnt;
 133         u_int           flags;
 134 };
 135
 136 typedef struct hammer2_chain_core hammer2_chain_core_t;
 137
 138 #define HAMMER2_CORE_INDIRECT           0x0001
 139
 140 struct hammer2_chain {
 141         RB_ENTRY(hammer2_chain) rbnode;
 142         hammer2_blockref_t      bref;
 143         hammer2_chain_core_t    *core;
 144         hammer2_chain_core_t    *above;
 145         struct hammer2_chain    *next_parent;
 146         struct hammer2_state    *state;         /* if active cache msg */
 147         struct hammer2_mount    *hmp;
 148 #if 0
 149         struct hammer2_chain    *duplink;       /* duplication link */
 150 #endif
 151
 152         hammer2_tid_t   modify_tid;             /* snapshot/flush filter */
 153         hammer2_tid_t   delete_tid;
 154         struct buf      *bp;                    /* physical data buffer */
 155         u_int           bytes;                  /* physical data size */
 156         int             index;                  /* blockref index in parent */
 157         u_int           flags;
 158         u_int           refs;
 159         u_int           lockcnt;
 160         hammer2_media_data_t *data;             /* data pointer shortcut */
 161         TAILQ_ENTRY(hammer2_chain) flush_node;  /* flush deferral list */
 162 };
 163
 164 typedef struct hammer2_chain hammer2_chain_t;
 165
 166 int hammer2_chain_cmp(hammer2_chain_t *chain1, hammer2_chain_t *chain2);
 167 RB_PROTOTYPE(hammer2_chain_tree, hammer2_chain, rbnode, hammer2_chain_cmp);
 168
 169 /*
 170  * Special notes on flags:
 171  *
 172  * INITIAL - This flag allows a chain to be created and for storage to
 173  *           be allocated without having to immediately instantiate the
 174  *           related buffer.  The data is assumed to be all-zeros.  It
 175  *           is primarily used for indirect blocks.
 176  *
 177  * MOVED   - A modified chain becomes MOVED after it flushes.  A chain
 178  *           can also become MOVED if it is moved within the topology
 179  *           (even if not modified).
 180  *
 181  */
 182 #define HAMMER2_CHAIN_MODIFIED          0x00000001      /* dirty chain data */
 183 #define HAMMER2_CHAIN_ALLOCATED         0x00000002      /* kmalloc'd chain */
 184 #define HAMMER2_CHAIN_DIRTYBP           0x00000004      /* dirty on unlock */
 185 #define HAMMER2_CHAIN_SUBMODIFIED       0x00000008      /* recursive flush */
 186 #define HAMMER2_CHAIN_DELETED           0x00000010      /* deleted chain */
 187 #define HAMMER2_CHAIN_INITIAL           0x00000020      /* initial create */
 188 #define HAMMER2_CHAIN_FLUSHED           0x00000040      /* flush on unlock */
 189 #define HAMMER2_CHAIN_MOVED             0x00000080      /* bref changed */
 190 #define HAMMER2_CHAIN_IOFLUSH           0x00000100      /* bawrite on put */
 191 #define HAMMER2_CHAIN_DEFERRED          0x00000200      /* on a deferral list */
 192 #define HAMMER2_CHAIN_DESTROYED         0x00000400      /* destroying inode */
 193 #define HAMMER2_CHAIN_VOLUMESYNC        0x00000800      /* needs volume sync */
 194 #define HAMMER2_CHAIN_RECYCLE           0x00001000      /* force recycle */
 195 #define HAMMER2_CHAIN_MOUNTED           0x00002000      /* PFS is mounted */
 196 #define HAMMER2_CHAIN_ONRBTREE          0x00004000      /* on parent RB tree */
 197 #define HAMMER2_CHAIN_SNAPSHOT          0x00008000      /* snapshot special */
 198 #define HAMMER2_CHAIN_EMBEDDED          0x00010000      /* embedded data */
 199
 200 /*
 201  * Flags passed to hammer2_chain_lookup() and hammer2_chain_next()
 202  *
 203  * NOTE: MATCHIND allows an indirect block / freemap node to be returned
 204  *       when the passed key range matches the radix.  Remember that key_end
 205  *       is inclusive (e.g. {0x000,0xFFF}, not {0x000,0x1000}).
 206  */
 207 #define HAMMER2_LOOKUP_NOLOCK           0x00000001      /* ref only */
 208 #define HAMMER2_LOOKUP_NODATA           0x00000002      /* data left NULL */
 209 #define HAMMER2_LOOKUP_SHARED           0x00000100
 210 #define HAMMER2_LOOKUP_MATCHIND         0x00000200
 211 #define HAMMER2_LOOKUP_FREEMAP          0x00000400      /* freemap base */
 212 #define HAMMER2_LOOKUP_ALWAYS           0x00000800      /* resolve data */
 213
 214 /*
 215  * Flags passed to hammer2_chain_modify() and hammer2_chain_resize()
 216  *
 217  * NOTE: OPTDATA allows us to avoid instantiating buffers for INDIRECT
 218  *       blocks in the INITIAL-create state.
 219  */
 220 #define HAMMER2_MODIFY_OPTDATA          0x00000002      /* data can be NULL */
 221 #define HAMMER2_MODIFY_NO_MODIFY_TID    0x00000004
 222 #define HAMMER2_MODIFY_ASSERTNOCOPY     0x00000008
 223 #define HAMMER2_MODIFY_NOREALLOC        0x00000010
 224
 225 /*
 226  * Flags passed to hammer2_chain_lock()
 227  */
 228 #define HAMMER2_RESOLVE_NEVER           1
 229 #define HAMMER2_RESOLVE_MAYBE           2
 230 #define HAMMER2_RESOLVE_ALWAYS          3
 231 #define HAMMER2_RESOLVE_MASK            0x0F
 232
 233 #define HAMMER2_RESOLVE_SHARED          0x10    /* request shared lock */
 234 #define HAMMER2_RESOLVE_NOREF           0x20    /* already ref'd on lock */
 235
 236 /*
 237  * Flags passed to hammer2_chain_delete_duplicate()
 238  */
 239 #define HAMMER2_DELDUP_RECORE           0x0001
 240
 241 /*
 242  * Cluster different types of storage together for allocations
 243  */
 244 #define HAMMER2_FREECACHE_INODE         0
 245 #define HAMMER2_FREECACHE_INDIR         1
 246 #define HAMMER2_FREECACHE_DATA          2
 247 #define HAMMER2_FREECACHE_UNUSED3       3
 248 #define HAMMER2_FREECACHE_TYPES         4
 249
 250 /*
 251  * hammer2_freemap_alloc() block preference
 252  */
 253 #define HAMMER2_OFF_NOPREF              ((hammer2_off_t)-1)
 254
 255 /*
 256  * BMAP read-ahead maximum parameters
 257  */
 258 #define HAMMER2_BMAP_COUNT              16      /* max bmap read-ahead */
 259 #define HAMMER2_BMAP_BYTES              (HAMMER2_PBUFSIZE * HAMMER2_BMAP_COUNT)
 260
 261 /*
 262  * Misc
 263  */
 264 #define HAMMER2_FLUSH_DEPTH_LIMIT       40      /* stack recursion limit */
 265
 266 /*
 267  * HAMMER2 IN-MEMORY CACHE OF MEDIA STRUCTURES
 268  *
 269  * There is an in-memory representation of all on-media data structure.
 270  *
 271  * When accessed read-only the data will be mapped to the related buffer
 272  * cache buffer.
 273  *
 274  * When accessed read-write (marked modified) a kmalloc()'d copy of the
 275  * is created which can then be modified.  The copy is destroyed when a
 276  * filesystem block is allocated to replace it.
 277  *
 278  * Active inodes (those with vnodes attached) will maintain the kmalloc()'d
 279  * copy for both the read-only and the read-write case.  The combination of
 280  * (bp) and (data) determines whether (data) was allocated or not.
 281  *
 282  * The in-memory representation may remain cached (for example in order to
 283  * placemark clustering locks) even after the related data has been
 284  * detached.
 285  */
 286
 287 RB_HEAD(hammer2_inode_tree, hammer2_inode);
 288
 289 /*
 290  * A hammer2 inode.
 291  *
 292  * NOTE: The inode's attribute CST which is also used to lock the inode
 293  *       is embedded in the chain (chain.cst) and aliased w/ attr_cst.
 294  */
 295 struct hammer2_inode {
 296         RB_ENTRY(hammer2_inode) rbnode;         /* inumber lookup (HL) */
 297         ccms_cst_t              topo_cst;       /* directory topology cst */
 298         struct hammer2_mount    *hmp;           /* Global mount */
 299         struct hammer2_pfsmount *pmp;           /* PFS mount */
 300         struct hammer2_inode    *pip;           /* parent inode */
 301         struct vnode            *vp;
 302         hammer2_chain_t         *chain;         /* NOTE: rehomed on rename */
 303         struct lockf            advlock;
 304         hammer2_tid_t           inum;
 305         u_int                   flags;
 306         u_int                   refs;           /* +vpref, +flushref */
 307 };
 308
 309 typedef struct hammer2_inode hammer2_inode_t;
 310
 311 #define HAMMER2_INODE_MODIFIED          0x0001
 312 #define HAMMER2_INODE_UNUSED0002        0x0002
 313 #define HAMMER2_INODE_RENAME_INPROG     0x0004
 314 #define HAMMER2_INODE_ONRBTREE          0x0008
 315
 316 int hammer2_inode_cmp(hammer2_inode_t *ip1, hammer2_inode_t *ip2);
 317 RB_PROTOTYPE2(hammer2_inode_tree, hammer2_inode, rbnode, hammer2_inode_cmp,
 318                 hammer2_tid_t);
 319
 320 /*
 321  * A hammer2 transaction and flush sequencing structure.
 322  *
 323  * This global structure is tied into hammer2_mount and is used
 324  * to sequence modifying operations and flushes.
 325  *
 326  * (a) Any modifying operations with sync_tid >= flush_tid will stall until
 327  *     all modifying operating with sync_tid < flush_tid complete.
 328  *
 329  *     The flush related to flush_tid stalls until all modifying operations
 330  *     with sync_tid < flush_tid complete.
 331  *
 332  * (b) Once unstalled, modifying operations with sync_tid > flush_tid are
 333  *     allowed to run.  All modifications cause modify/duplicate operations
 334  *     to occur on the related chains.  Note that most INDIRECT blocks will
 335  *     be unaffected because the modifications just overload the RBTREE
 336  *     structurally instead of actually modifying the indirect blocks.
 337  *
 338  * (c) The actual flush unstalls and RUNS CONCURRENTLY with (b), but only
 339  *     utilizes the chain structures with sync_tid <= flush_tid.  The
 340  *     flush will modify related indirect blocks and inodes in-place
 341  *     (rather than duplicate) since the adjustments are compatible with
 342  *     (b)'s RBTREE overloading
 343  *
 344  *     SPECIAL NOTE:  Inode modifications have to also propagate along any
 345  *                    modify/duplicate chains.  File writes detect the flush
 346  *                    and force out the conflicting buffer cache buffer(s)
 347  *                    before reusing them.
 348  *
 349  * (d) Snapshots can be made instantly but must be flushed and disconnected
 350  *     from their duplicative source before they can be mounted.  This is
 351  *     because while H2's on-media structure supports forks, its in-memory
 352  *     structure only supports very simple forking for background flushing
 353  *     purposes.
 354  *
 355  * TODO: Flush merging.  When fsync() is called on multiple discrete files
 356  *       concurrently there is no reason to stall the second fsync.
 357  *       The final flush that reaches to root can cover both fsync()s.
 358  *
 359  *     The chains typically terminate as they fly onto the disk.  The flush
 360  *     ultimately reaches the volume header.
 361  */
 362 struct hammer2_trans {
 363         TAILQ_ENTRY(hammer2_trans) entry;
 364         struct hammer2_mount    *hmp;
 365         hammer2_tid_t           sync_tid;
 366         thread_t                td;             /* pointer */
 367         int                     flags;
 368         int                     blocked;
 369         struct hammer2_inode    *tmp_ip;        /* heuristics only */
 370         hammer2_off_t           tmp_bpref;      /* heuristics only */
 371         uint8_t                 inodes_created;
 372         uint8_t                 dummy[7];
 373 };
 374
 375 typedef struct hammer2_trans hammer2_trans_t;
 376
 377 #define HAMMER2_TRANS_ISFLUSH           0x0001
 378 #define HAMMER2_TRANS_RESTRICTED        0x0002  /* snapshot flush restrict */
 379
 380 /*
 381  * XXX
 382  */
 383 struct hammer2_freecache {
 384         hammer2_off_t   bulk;
 385         hammer2_off_t   single;
 386 };
 387
 388 typedef struct hammer2_freecache hammer2_freecache_t;
 389
 390 /*
 391  * Global (per device) mount structure for device (aka vp->v_mount->hmp)
 392  */
 393 TAILQ_HEAD(hammer2_trans_queue, hammer2_trans);
 394
 395 struct hammer2_mount {
 396         struct vnode    *devvp;         /* device vnode */
 397         int             ronly;          /* read-only mount */
 398         int             pmp_count;      /* PFS mounts backed by us */
 399         TAILQ_ENTRY(hammer2_mount) mntentry; /* hammer2_mntlist */
 400
 401         struct malloc_type *minode;
 402         int             ninodes;
 403         int             maxinodes;
 404
 405         struct malloc_type *mchain;
 406         int             nipstacks;
 407         int             maxipstacks;
 408         hammer2_chain_t vchain;         /* anchor chain */
 409         hammer2_chain_t fchain;         /* freemap chain special */
 410         hammer2_chain_t *schain;        /* super-root */
 411         hammer2_inode_t *sroot;         /* super-root inode */
 412         struct lock     alloclk;        /* lockmgr lock */
 413         struct lock     voldatalk;      /* lockmgr lock */
 414         struct hammer2_trans_queue transq; /* all in-progress transactions */
 415         hammer2_trans_t *curflush;      /* current flush in progress */
 416         hammer2_tid_t   topo_flush_tid; /* currently synchronizing flush pt */
 417         hammer2_tid_t   free_flush_tid; /* currently synchronizing flush pt */
 418         hammer2_off_t   heur_last_alloc;
 419         int             flushcnt;       /* #of flush trans on the list */
 420
 421         int             volhdrno;       /* last volhdrno written */
 422         hammer2_volume_data_t voldata;
 423         hammer2_volume_data_t volsync;  /* synchronized voldata */
 424         hammer2_freecache_t freecache[HAMMER2_FREECACHE_TYPES]
 425                                      [HAMMER2_MAX_RADIX+1];
 426 };
 427
 428 typedef struct hammer2_mount hammer2_mount_t;
 429
 430 /*
 431  * Per-PFS mount structure for device (aka vp->v_mount)
 432  */
 433 struct hammer2_pfsmount {
 434         struct mount            *mp;            /* kernel mount */
 435         struct hammer2_mount    *hmp;           /* device global mount */
 436         hammer2_chain_t         *rchain;        /* PFS root chain */
 437         hammer2_inode_t         *iroot;         /* PFS root inode */
 438         hammer2_off_t           inode_count;    /* copy of inode_count */
 439         ccms_domain_t           ccms_dom;
 440         struct netexport        export;         /* nfs export */
 441         int                     ronly;          /* read-only mount */
 442         struct malloc_type      *mmsg;
 443         kdmsg_iocom_t           iocom;
 444         struct spinlock         inum_spin;      /* inumber lookup */
 445         struct hammer2_inode_tree inum_tree;
 446 };
 447
 448 typedef struct hammer2_pfsmount hammer2_pfsmount_t;
 449
 450 #if defined(_KERNEL)
 451
 452 MALLOC_DECLARE(M_HAMMER2);
 453
 454 #define VTOI(vp)        ((hammer2_inode_t *)(vp)->v_data)
 455 #define ITOV(ip)        ((ip)->vp)
 456
 457 static __inline
 458 hammer2_pfsmount_t *
 459 MPTOPMP(struct mount *mp)
 460 {
 461         return ((hammer2_pfsmount_t *)mp->mnt_data);
 462 }
 463
 464 static __inline
 465 hammer2_mount_t *
 466 MPTOHMP(struct mount *mp)
 467 {
 468         return (((hammer2_pfsmount_t *)mp->mnt_data)->hmp);
 469 }
 470
 471 static __inline
 472 int
 473 hammer2_chain_refactor_test(hammer2_chain_t *chain, int traverse_hlink)
 474 {
 475         if ((chain->flags & HAMMER2_CHAIN_DELETED) &&
 476             chain->next_parent &&
 477             (chain->next_parent->flags & HAMMER2_CHAIN_SNAPSHOT) == 0) {
 478                 return (1);
 479         }
 480         if (traverse_hlink &&
 481             chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
 482             chain->data->ipdata.type == HAMMER2_OBJTYPE_HARDLINK &&
 483             chain->next_parent &&
 484             (chain->next_parent->flags & HAMMER2_CHAIN_SNAPSHOT) == 0) {
 485                 return(1);
 486         }
 487
 488         return (0);
 489 }
 490
 491 extern struct vop_ops hammer2_vnode_vops;
 492 extern struct vop_ops hammer2_spec_vops;
 493 extern struct vop_ops hammer2_fifo_vops;
 494
 495 extern int hammer2_debug;
 496 extern int hammer2_cluster_enable;
 497 extern int hammer2_hardlink_enable;
 498 extern long hammer2_iod_file_read;
 499 extern long hammer2_iod_meta_read;
 500 extern long hammer2_iod_indr_read;
 501 extern long hammer2_iod_file_write;
 502 extern long hammer2_iod_meta_write;
 503 extern long hammer2_iod_indr_write;
 504 extern long hammer2_iod_fmap_write;
 505 extern long hammer2_iod_volu_write;
 506 extern long hammer2_ioa_file_read;
 507 extern long hammer2_ioa_meta_read;
 508 extern long hammer2_ioa_indr_read;
 509 extern long hammer2_ioa_file_write;
 510 extern long hammer2_ioa_meta_write;
 511 extern long hammer2_ioa_indr_write;
 512 extern long hammer2_ioa_fmap_write;
 513 extern long hammer2_ioa_volu_write;
 514
 515 /*
 516  * hammer2_subr.c
 517  */
 518 #define hammer2_icrc32(buf, size)       iscsi_crc32((buf), (size))
 519 #define hammer2_icrc32c(buf, size, crc) iscsi_crc32_ext((buf), (size), (crc))
 520
 521 hammer2_chain_t *hammer2_inode_lock_ex(hammer2_inode_t *ip);
 522 hammer2_chain_t *hammer2_inode_lock_sh(hammer2_inode_t *ip);
 523 void hammer2_inode_unlock_ex(hammer2_inode_t *ip, hammer2_chain_t *chain);
 524 void hammer2_inode_unlock_sh(hammer2_inode_t *ip, hammer2_chain_t *chain);
 525 void hammer2_voldata_lock(hammer2_mount_t *hmp);
 526 void hammer2_voldata_unlock(hammer2_mount_t *hmp, int modify);
 527 ccms_state_t hammer2_inode_lock_temp_release(hammer2_inode_t *ip);
 528 void hammer2_inode_lock_temp_restore(hammer2_inode_t *ip, ccms_state_t ostate);
 529 ccms_state_t hammer2_inode_lock_upgrade(hammer2_inode_t *ip);
 530 void hammer2_inode_lock_downgrade(hammer2_inode_t *ip, ccms_state_t ostate);
 531
 532 void hammer2_mount_exlock(hammer2_mount_t *hmp);
 533 void hammer2_mount_shlock(hammer2_mount_t *hmp);
 534 void hammer2_mount_unlock(hammer2_mount_t *hmp);
 535
 536 int hammer2_get_dtype(hammer2_chain_t *chain);
 537 int hammer2_get_vtype(hammer2_chain_t *chain);
 538 u_int8_t hammer2_get_obj_type(enum vtype vtype);
 539 void hammer2_time_to_timespec(u_int64_t xtime, struct timespec *ts);
 540 u_int64_t hammer2_timespec_to_time(struct timespec *ts);
 541 u_int32_t hammer2_to_unix_xid(uuid_t *uuid);
 542 void hammer2_guid_to_uuid(uuid_t *uuid, u_int32_t guid);
 543
 544 hammer2_key_t hammer2_dirhash(const unsigned char *name, size_t len);
 545 int hammer2_getradix(size_t bytes);
 546
 547 int hammer2_calc_logical(hammer2_inode_t *ip, hammer2_off_t uoff,
 548                          hammer2_key_t *lbasep, hammer2_key_t *leofp);
 549 void hammer2_update_time(uint64_t *timep);
 550
 551 /*
 552  * hammer2_inode.c
 553  */
 554 struct vnode *hammer2_igetv(hammer2_inode_t *ip, int *errorp);
 555
 556 void hammer2_inode_lock_nlinks(hammer2_inode_t *ip);
 557 void hammer2_inode_unlock_nlinks(hammer2_inode_t *ip);
 558 hammer2_inode_t *hammer2_inode_lookup(hammer2_pfsmount_t *pmp,
 559                         hammer2_tid_t inum);
 560 hammer2_inode_t *hammer2_inode_get(hammer2_mount_t *hmp,
 561                         hammer2_pfsmount_t *pmp, hammer2_inode_t *dip,
 562                         hammer2_chain_t *chain);
 563 void hammer2_inode_free(hammer2_inode_t *ip);
 564 void hammer2_inode_ref(hammer2_inode_t *ip);
 565 void hammer2_inode_drop(hammer2_inode_t *ip);
 566 void hammer2_inode_repoint(hammer2_inode_t *ip, hammer2_inode_t *pip,
 567                         hammer2_chain_t *chain);
 568
 569 hammer2_inode_t *hammer2_inode_create(hammer2_trans_t *trans,
 570                         hammer2_inode_t *dip,
 571                         struct vattr *vap, struct ucred *cred,
 572                         const uint8_t *name, size_t name_len,
 573                         hammer2_chain_t **chainp, int *errorp);
 574 int hammer2_inode_connect(hammer2_trans_t *trans, int hlink,
 575                         hammer2_inode_t *dip, hammer2_chain_t **chainp,
 576                         const uint8_t *name, size_t name_len);
 577 hammer2_inode_t *hammer2_inode_common_parent(hammer2_inode_t *fdip,
 578                         hammer2_inode_t *tdip);
 579
 580 int hammer2_unlink_file(hammer2_trans_t *trans, hammer2_inode_t *dip,
 581                         const uint8_t *name, size_t name_len, int isdir,
 582                         int *hlinkp);
 583 int hammer2_hardlink_consolidate(hammer2_trans_t *trans, hammer2_inode_t *ip,
 584                         hammer2_chain_t **chainp,
 585                         hammer2_inode_t *tdip, int linkcnt);
 586 int hammer2_hardlink_deconsolidate(hammer2_trans_t *trans, hammer2_inode_t *dip,
 587                         hammer2_chain_t **chainp, hammer2_chain_t **ochainp);
 588 int hammer2_hardlink_find(hammer2_inode_t *dip,
 589                         hammer2_chain_t **chainp, hammer2_chain_t **ochainp);
 590
 591 /*
 592  * hammer2_chain.c
 593  */
 594 void hammer2_modify_volume(hammer2_mount_t *hmp);
 595 hammer2_chain_t *hammer2_chain_alloc(hammer2_mount_t *hmp,
 596                                 hammer2_trans_t *trans,
 597                                 hammer2_blockref_t *bref);
 598 void hammer2_chain_core_alloc(hammer2_chain_t *chain,
 599                                 hammer2_chain_core_t *core);
 600 void hammer2_chain_ref(hammer2_chain_t *chain);
 601 void hammer2_chain_drop(hammer2_chain_t *chain);
 602 int hammer2_chain_lock(hammer2_chain_t *chain, int how);
 603 void hammer2_chain_moved(hammer2_chain_t *chain);
 604 void hammer2_chain_modify(hammer2_trans_t *trans,
 605                                 hammer2_chain_t **chainp, int flags);
 606 hammer2_inode_data_t *hammer2_chain_modify_ip(hammer2_trans_t *trans,
 607                                 hammer2_inode_t *ip, hammer2_chain_t **chainp,
 608                                 int flags);
 609 void hammer2_chain_resize(hammer2_trans_t *trans, hammer2_inode_t *ip,
 610                                 struct buf *bp,
 611                                 hammer2_chain_t *parent,
 612                                 hammer2_chain_t **chainp,
 613                                 int nradix, int flags);
 614 void hammer2_chain_unlock(hammer2_chain_t *chain);
 615 void hammer2_chain_wait(hammer2_chain_t *chain);
 616 hammer2_chain_t *hammer2_chain_find(hammer2_chain_t *parent, int index);
 617 hammer2_chain_t *hammer2_chain_get(hammer2_chain_t *parent, int index,
 618                                 int flags);
 619 hammer2_chain_t *hammer2_chain_lookup_init(hammer2_chain_t *parent, int flags);
 620 void hammer2_chain_lookup_done(hammer2_chain_t *parent);
 621 hammer2_chain_t *hammer2_chain_lookup(hammer2_chain_t **parentp,
 622                                 hammer2_key_t key_beg, hammer2_key_t key_end,
 623                                 int flags);
 624 hammer2_chain_t *hammer2_chain_next(hammer2_chain_t **parentp,
 625                                 hammer2_chain_t *chain,
 626                                 hammer2_key_t key_beg, hammer2_key_t key_end,
 627                                 int flags);
 628 int hammer2_chain_create(hammer2_trans_t *trans,
 629                                 hammer2_chain_t **parentp,
 630                                 hammer2_chain_t **chainp,
 631                                 hammer2_key_t key, int keybits,
 632                                 int type, size_t bytes);
 633 void hammer2_chain_duplicate(hammer2_trans_t *trans, hammer2_chain_t *parent,
 634                                 int i,
 635                                 hammer2_chain_t **chainp,
 636                                 hammer2_blockref_t *bref);
 637 int hammer2_chain_snapshot(hammer2_trans_t *trans, hammer2_inode_t *ip,
 638                                 hammer2_ioc_pfs_t *pfs);
 639 void hammer2_chain_delete(hammer2_trans_t *trans, hammer2_chain_t *chain);
 640 void hammer2_chain_delete_duplicate(hammer2_trans_t *trans,
 641                                 hammer2_chain_t **chainp, int flags);
 642 void hammer2_chain_flush(hammer2_trans_t *trans, hammer2_chain_t *chain);
 643 void hammer2_chain_commit(hammer2_trans_t *trans, hammer2_chain_t *chain);
 644 void hammer2_chain_setsubmod(hammer2_trans_t *trans, hammer2_chain_t *chain);
 645
 646 /*
 647  * hammer2_trans.c
 648  */
 649 void hammer2_trans_init(hammer2_trans_t *trans, hammer2_mount_t *hmp,
 650                         hammer2_inode_t *ip, int flags);
 651 void hammer2_trans_done(hammer2_trans_t *trans);
 652
 653 /*
 654  * hammer2_ioctl.c
 655  */
 656 int hammer2_ioctl(hammer2_inode_t *ip, u_long com, void *data,
 657                                 int fflag, struct ucred *cred);
 658
 659 /*
 660  * hammer2_msgops.c
 661  */
 662 int hammer2_msg_dbg_rcvmsg(kdmsg_msg_t *msg);
 663 int hammer2_msg_adhoc_input(kdmsg_msg_t *msg);
 664
 665 /*
 666  * hammer2_vfsops.c
 667  */
 668 void hammer2_clusterctl_wakeup(kdmsg_iocom_t *iocom);
 669 void hammer2_volconf_update(hammer2_pfsmount_t *pmp, int index);
 670 void hammer2_cluster_reconnect(hammer2_pfsmount_t *pmp, struct file *fp);
 671 void hammer2_dump_chain(hammer2_chain_t *chain, int tab, int *countp);
 672
 673 /*
 674  * hammer2_freemap.c
 675  */
 676 int hammer2_freemap_alloc(hammer2_trans_t *trans,
 677                                 hammer2_blockref_t *bref, size_t bytes);
 678 void hammer2_freemap_free(hammer2_mount_t *hmp, hammer2_off_t data_off,
 679                                 int type);
 680
 681 #endif /* !_KERNEL */
 682 #endif /* !_VFS_HAMMER2_HAMMER2_H_ */